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net: remove ax25 and amateur radio (hamradio) subsystem

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Remove the amateur radio (AX.25, NET/ROM, ROSE) protocol implementation
and all associated hamradio device drivers from the kernel tree.
This set of protocols has long been a huge bug/syzbot magnet,
and since nobody stepped up to help us deal with the influx
of the AI-generated bug reports we need to move it out of tree
to protect our sanity.

The code is moved to an out-of-tree repo:
https://github.com/linux-netdev/mod-orphan
if it's cleaned up and reworked there we can accept it back.

Minimal stub headers are kept for include/net/ax25.h (AX25_P_IP,
AX25_ADDR_LEN, ax25_address) and include/net/rose.h (ROSE_ADDR_LEN)
so that the conditional integration code in arp.c and tun.c continues
to compile and work when the out-of-tree modules are loaded.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Carlos Bilbao <carlos.bilbao@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Acked-by: Toke Høiland-Jørgensen <toke@toke.dk>
Link: https://patch.msgid.link/20260421021824.1293976-1-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Jakub Kicinski 2026-04-20 19:18:23 -07:00
parent 4f10f1dfb2
commit dd8d4bc28a
93 changed files with 6 additions and 29237 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/.renames.txt
View File

@ -783,7 +783,6 @@ namespaces/compatibility-list admin-guide/namespaces/compatibility-list
namespaces/index admin-guide/namespaces/index namespaces/index admin-guide/namespaces/index
namespaces/resource-control admin-guide/namespaces/resource-control namespaces/resource-control admin-guide/namespaces/resource-control
networking/altera_tse networking/device_drivers/ethernet/altera/altera_tse networking/altera_tse networking/device_drivers/ethernet/altera/altera_tse
networking/baycom networking/device_drivers/hamradio/baycom
networking/bpf_flow_dissector bpf/prog_flow_dissector networking/bpf_flow_dissector bpf/prog_flow_dissector
networking/cxacru networking/device_drivers/atm/cxacru networking/cxacru networking/device_drivers/atm/cxacru
networking/defza networking/device_drivers/fddi/defza networking/defza networking/device_drivers/fddi/defza
@ -848,7 +847,6 @@ networking/ixgbe networking/device_drivers/ethernet/intel/ixgbe
networking/ixgbevf networking/device_drivers/ethernet/intel/ixgbevf networking/ixgbevf networking/device_drivers/ethernet/intel/ixgbevf
networking/netdev-FAQ process/maintainer-netdev networking/netdev-FAQ process/maintainer-netdev
networking/skfp networking/device_drivers/fddi/skfp networking/skfp networking/device_drivers/fddi/skfp
networking/z8530drv networking/device_drivers/hamradio/z8530drv
nfc/index driver-api/nfc/index nfc/index driver-api/nfc/index
nfc/nfc-hci driver-api/nfc/nfc-hci nfc/nfc-hci driver-api/nfc/nfc-hci
nfc/nfc-pn544 driver-api/nfc/nfc-pn544 nfc/nfc-pn544 driver-api/nfc/nfc-pn544

18
Documentation/admin-guide/kernel-parameters.txt
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@ -6,7 +6,6 @@
APPARMOR AppArmor support is enabled. APPARMOR AppArmor support is enabled.
ARM ARM architecture is enabled. ARM ARM architecture is enabled.
ARM64 ARM64 architecture is enabled. ARM64 ARM64 architecture is enabled.
AX25 Appropriate AX.25 support is enabled.
CLK Common clock infrastructure is enabled. CLK Common clock infrastructure is enabled.
CMA Contiguous Memory Area support is enabled. CMA Contiguous Memory Area support is enabled.
DRM Direct Rendering Management support is enabled. DRM Direct Rendering Management support is enabled.
@ -633,23 +632,6 @@ Kernel parameters
1 - Enable the BAU. 1 - Enable the BAU.
unset - Disable the BAU. unset - Disable the BAU.
baycom_epp= [HW,AX25]
Format: <io>,<mode>
baycom_par= [HW,AX25] BayCom Parallel Port AX.25 Modem
Format: <io>,<mode>
See header of drivers/net/hamradio/baycom_par.c.
baycom_ser_fdx= [HW,AX25]
BayCom Serial Port AX.25 Modem (Full Duplex Mode)
Format: <io>,<irq>,<mode>[,<baud>]
See header of drivers/net/hamradio/baycom_ser_fdx.c.
baycom_ser_hdx= [HW,AX25]
BayCom Serial Port AX.25 Modem (Half Duplex Mode)
Format: <io>,<irq>,<mode>
See header of drivers/net/hamradio/baycom_ser_hdx.c.
bdev_allow_write_mounted= bdev_allow_write_mounted=
Format: <bool> Format: <bool>
Control the ability to open a mounted block device Control the ability to open a mounted block device

191
Documentation/networking/6pack.rst
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@ -1,191 +0,0 @@
.. SPDX-License-Identifier: GPL-2.0
==============
6pack Protocol
==============
This is the 6pack-mini-HOWTO, written by
Andreas Könsgen DG3KQ
:Internet: ajk@comnets.uni-bremen.de
:AMPR-net: dg3kq@db0pra.ampr.org
:AX.25: dg3kq@db0ach.#nrw.deu.eu
Last update: April 7, 1998
1. What is 6pack, and what are the advantages to KISS?
======================================================
6pack is a transmission protocol for data exchange between the PC and
the TNC over a serial line. It can be used as an alternative to KISS.
6pack has two major advantages:
- The PC is given full control over the radio
channel. Special control data is exchanged between the PC and the TNC so
that the PC knows at any time if the TNC is receiving data, if a TNC
buffer underrun or overrun has occurred, if the PTT is
set and so on. This control data is processed at a higher priority than
normal data, so a data stream can be interrupted at any time to issue an
important event. This helps to improve the channel access and timing
algorithms as everything is computed in the PC. It would even be possible
to experiment with something completely different from the known CSMA and
DAMA channel access methods.
This kind of real-time control is especially important to supply several
TNCs that are connected between each other and the PC by a daisy chain
(however, this feature is not supported yet by the Linux 6pack driver).
- Each packet transferred over the serial line is supplied with a checksum,
so it is easy to detect errors due to problems on the serial line.
Received packets that are corrupt are not passed on to the AX.25 layer.
Damaged packets that the TNC has received from the PC are not transmitted.
More details about 6pack are described in the file 6pack.ps that is located
in the doc directory of the AX.25 utilities package.
2. Who has developed the 6pack protocol?
========================================
The 6pack protocol has been developed by Ekki Plicht DF4OR, Henning Rech
DF9IC and Gunter Jost DK7WJ. A driver for 6pack, written by Gunter Jost and
Matthias Welwarsky DG2FEF, comes along with the PC version of FlexNet.
They have also written a firmware for TNCs to perform the 6pack
protocol (see section 4 below).
3. Where can I get the latest version of 6pack for LinuX?
=========================================================
At the moment, the 6pack stuff can obtained via anonymous ftp from
db0bm.automation.fh-aachen.de. In the directory /incoming/dg3kq,
there is a file named 6pack.tgz.
4. Preparing the TNC for 6pack operation
========================================
To be able to use 6pack, a special firmware for the TNC is needed. The EPROM
of a newly bought TNC does not contain 6pack, so you will have to
program an EPROM yourself. The image file for 6pack EPROMs should be
available on any packet radio box where PC/FlexNet can be found. The name of
the file is 6pack.bin. This file is copyrighted and maintained by the FlexNet
team. It can be used under the terms of the license that comes along
with PC/FlexNet. Please do not ask me about the internals of this file as I
don't know anything about it. I used a textual description of the 6pack
protocol to program the Linux driver.
TNCs contain a 64kByte EPROM, the lower half of which is used for
the firmware/KISS. The upper half is either empty or is sometimes
programmed with software called TAPR. In the latter case, the TNC
is supplied with a DIP switch so you can easily change between the
two systems. When programming a new EPROM, one of the systems is replaced
by 6pack. It is useful to replace TAPR, as this software is rarely used
nowadays. If your TNC is not equipped with the switch mentioned above, you
can build in one yourself that switches over the highest address pin
of the EPROM between HIGH and LOW level. After having inserted the new EPROM
and switched to 6pack, apply power to the TNC for a first test. The connect
and the status LED are lit for about a second if the firmware initialises
the TNC correctly.
5. Building and installing the 6pack driver
===========================================
The driver has been tested with kernel version 2.1.90. Use with older
kernels may lead to a compilation error because the interface to a kernel
function has been changed in the 2.1.8x kernels.
How to turn on 6pack support:
-----------------------------
- In the linux kernel configuration program, select the code maturity level
options menu and turn on the prompting for development drivers.
- Select the amateur radio support menu and turn on the serial port 6pack
driver.
- Compile and install the kernel and the modules.
To use the driver, the kissattach program delivered with the AX.25 utilities
has to be modified.
- Do a cd to the directory that holds the kissattach sources. Edit the
kissattach.c file. At the top, insert the following lines::
#ifndef N_6PACK
#define N_6PACK (N_AX25+1)
#endif
Then find the line:
int disc = N_AX25;
and replace N_AX25 by N_6PACK.
- Recompile kissattach. Rename it to spattach to avoid confusions.
Installing the driver:
----------------------
- Do an insmod 6pack. Look at your /var/log/messages file to check if the
module has printed its initialization message.
- Do a spattach as you would launch kissattach when starting a KISS port.
Check if the kernel prints the message '6pack: TNC found'.
- From here, everything should work as if you were setting up a KISS port.
The only difference is that the network device that represents
the 6pack port is called sp instead of sl or ax. So, sp0 would be the
first 6pack port.
Although the driver has been tested on various platforms, I still declare it
ALPHA. BE CAREFUL! Sync your disks before insmoding the 6pack module
and spattaching. Watch out if your computer behaves strangely. Read section
6 of this file about known problems.
Note that the connect and status LEDs of the TNC are controlled in a
different way than they are when the TNC is used with PC/FlexNet. When using
FlexNet, the connect LED is on if there is a connection; the status LED is
on if there is data in the buffer of the PC's AX.25 engine that has to be
transmitted. Under Linux, the 6pack layer is beyond the AX.25 layer,
so the 6pack driver doesn't know anything about connects or data that
has not yet been transmitted. Therefore the LEDs are controlled
as they are in KISS mode: The connect LED is turned on if data is transferred
from the PC to the TNC over the serial line, the status LED if data is
sent to the PC.
6. Known problems
=================
When testing the driver with 2.0.3x kernels and
operating with data rates on the radio channel of 9600 Baud or higher,
the driver may, on certain systems, sometimes print the message '6pack:
bad checksum', which is due to data loss if the other station sends two
or more subsequent packets. I have been told that this is due to a problem
with the serial driver of 2.0.3x kernels. I don't know yet if the problem
still exists with 2.1.x kernels, as I have heard that the serial driver
code has been changed with 2.1.x.
When shutting down the sp interface with ifconfig, the kernel crashes if
there is still an AX.25 connection left over which an IP connection was
running, even if that IP connection is already closed. The problem does not
occur when there is a bare AX.25 connection still running. I don't know if
this is a problem of the 6pack driver or something else in the kernel.
The driver has been tested as a module, not yet as a kernel-builtin driver.
The 6pack protocol supports daisy-chaining of TNCs in a token ring, which is
connected to one serial port of the PC. This feature is not implemented
and at least at the moment I won't be able to do it because I do not have
the opportunity to build a TNC daisy-chain and test it.
Some of the comments in the source code are inaccurate. They are left from
the SLIP/KISS driver, from which the 6pack driver has been derived.
I haven't modified or removed them yet -- sorry! The code itself needs
some cleaning and optimizing. This will be done in a later release.
If you encounter a bug or if you have a question or suggestion concerning the
driver, feel free to mail me, using the addresses given at the beginning of
this file.
Have fun!
Andreas

17
Documentation/networking/ax25.rst
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@ -1,17 +0,0 @@
.. SPDX-License-Identifier: GPL-2.0
=====
AX.25
=====
To use the amateur radio protocols within Linux you will need to get a
suitable copy of the AX.25 Utilities. More detailed information about
AX.25, NET/ROM and ROSE, associated programs and utilities can be
found on https://linux-ax25.in-berlin.de.
There is a mailing list for discussing Linux amateur radio matters
called linux-hams@vger.kernel.org. To subscribe to it, send a message to
linux-hams+subscribe@vger.kernel.org or use the web interface at
https://vger.kernel.org. The subject and body of the message are
ignored. You don't need to be subscribed to post but of course that
means you might miss an answer.

174
Documentation/networking/device_drivers/hamradio/baycom.rst
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@ -1,174 +0,0 @@
.. SPDX-License-Identifier: GPL-2.0
===============================
Linux Drivers for Baycom Modems
===============================
Thomas M. Sailer, HB9JNX/AE4WA, <sailer@ife.ee.ethz.ch>
The drivers for the baycom modems have been split into
separate drivers as they did not share any code, and the driver
and device names have changed.
This document describes the Linux Kernel Drivers for simple Baycom style
amateur radio modems.
The following drivers are available:
====================================
baycom_ser_fdx:
This driver supports the SER12 modems either full or half duplex.
Its baud rate may be changed via the ``baud`` module parameter,
therefore it supports just about every bit bang modem on a
serial port. Its devices are called bcsf0 through bcsf3.
This is the recommended driver for SER12 type modems,
however if you have a broken UART clone that does not have working
delta status bits, you may try baycom_ser_hdx.
baycom_ser_hdx:
This is an alternative driver for SER12 type modems.
It only supports half duplex, and only 1200 baud. Its devices
are called bcsh0 through bcsh3. Use this driver only if baycom_ser_fdx
does not work with your UART.
baycom_par:
This driver supports the par96 and picpar modems.
Its devices are called bcp0 through bcp3.
baycom_epp:
This driver supports the EPP modem.
Its devices are called bce0 through bce3.
This driver is work-in-progress.
The following modems are supported:
======= ========================================================================
ser12 This is a very simple 1200 baud AFSK modem. The modem consists only
of a modulator/demodulator chip, usually a TI TCM3105. The computer
is responsible for regenerating the receiver bit clock, as well as
for handling the HDLC protocol. The modem connects to a serial port,
hence the name. Since the serial port is not used as an async serial
port, the kernel driver for serial ports cannot be used, and this
driver only supports standard serial hardware (8250, 16450, 16550)
par96 This is a modem for 9600 baud FSK compatible to the G3RUH standard.
The modem does all the filtering and regenerates the receiver clock.
Data is transferred from and to the PC via a shift register.
The shift register is filled with 16 bits and an interrupt is signalled.
The PC then empties the shift register in a burst. This modem connects
to the parallel port, hence the name. The modem leaves the
implementation of the HDLC protocol and the scrambler polynomial to
the PC.
picpar This is a redesign of the par96 modem by Henning Rech, DF9IC. The modem
is protocol compatible to par96, but uses only three low power ICs
and can therefore be fed from the parallel port and does not require
an additional power supply. Furthermore, it incorporates a carrier
detect circuitry.
EPP This is a high-speed modem adaptor that connects to an enhanced parallel
port.
Its target audience is users working over a high speed hub (76.8kbit/s).
eppfpga This is a redesign of the EPP adaptor.
======= ========================================================================
All of the above modems only support half duplex communications. However,
the driver supports the KISS (see below) fullduplex command. It then simply
starts to send as soon as there's a packet to transmit and does not care
about DCD, i.e. it starts to send even if there's someone else on the channel.
This command is required by some implementations of the DAMA channel
access protocol.
The Interface of the drivers
============================
Unlike previous drivers, these drivers are no longer character devices,
but they are now true kernel network interfaces. Installation is therefore
simple. Once installed, four interfaces named bc{sf,sh,p,e}[0-3] are available.
sethdlc from the ax25 utilities may be used to set driver states etc.
Users of userland AX.25 stacks may use the net2kiss utility (also available
in the ax25 utilities package) to convert packets of a network interface
to a KISS stream on a pseudo tty. There's also a patch available from
me for WAMPES which allows attaching a kernel network interface directly.
Configuring the driver
======================
Every time a driver is inserted into the kernel, it has to know which
modems it should access at which ports. This can be done with the setbaycom
utility. If you are only using one modem, you can also configure the
driver from the insmod command line (or by means of an option line in
``/etc/modprobe.d/*.conf``).
Examples::
modprobe baycom_ser_fdx mode="ser12*" iobase=0x3f8 irq=4
sethdlc -i bcsf0 -p mode "ser12*" io 0x3f8 irq 4
Both lines configure the first port to drive a ser12 modem at the first
serial port (COM1 under DOS). The * in the mode parameter instructs the driver
to use the software DCD algorithm (see below)::
insmod baycom_par mode="picpar" iobase=0x378
sethdlc -i bcp0 -p mode "picpar" io 0x378
Both lines configure the first port to drive a picpar modem at the
first parallel port (LPT1 under DOS). (Note: picpar implies
hardware DCD, par96 implies software DCD).
The channel access parameters can be set with sethdlc -a or kissparms.
Note that both utilities interpret the values slightly differently.
Hardware DCD versus Software DCD
================================
To avoid collisions on the air, the driver must know when the channel is
busy. This is the task of the DCD circuitry/software. The driver may either
utilise a software DCD algorithm (options=1) or use a DCD signal from
the hardware (options=0).
======= =================================================================
ser12 if software DCD is utilised, the radio's squelch should always be
open. It is highly recommended to use the software DCD algorithm,
as it is much faster than most hardware squelch circuitry. The
disadvantage is a slightly higher load on the system.
par96 the software DCD algorithm for this type of modem is rather poor.
The modem simply does not provide enough information to implement
a reasonable DCD algorithm in software. Therefore, if your radio
feeds the DCD input of the PAR96 modem, the use of the hardware
DCD circuitry is recommended.
picpar the picpar modem features a builtin DCD hardware, which is highly
recommended.
======= =================================================================
Compatibility with the rest of the Linux kernel
===============================================
The serial driver and the baycom serial drivers compete
for the same hardware resources. Of course only one driver can access a given
interface at a time. The serial driver grabs all interfaces it can find at
startup time. Therefore the baycom drivers subsequently won't be able to
access a serial port. You might therefore find it necessary to release
a port owned by the serial driver with 'setserial /dev/ttyS# uart none', where
# is the number of the interface. The baycom drivers do not reserve any
ports at startup, unless one is specified on the 'insmod' command line. Another
method to solve the problem is to compile all drivers as modules and
leave it to kmod to load the correct driver depending on the application.
The parallel port drivers (baycom_par, baycom_epp) now use the parport subsystem
to arbitrate the ports between different client drivers.
vy 73s de
Tom Sailer, sailer@ife.ee.ethz.ch
hb9jnx @ hb9w.ampr.org

12
Documentation/networking/device_drivers/hamradio/index.rst
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@ -1,12 +0,0 @@
.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
Amateur Radio Device Drivers
============================
Contents:
.. toctree::
:maxdepth: 2
baycom
z8530drv

686
Documentation/networking/device_drivers/hamradio/z8530drv.rst
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@ -1,686 +0,0 @@
.. SPDX-License-Identifier: GPL-2.0
.. include:: <isonum.txt>
=========================================================
SCC.C - Linux driver for Z8530 based HDLC cards for AX.25
=========================================================
This is a subset of the documentation. To use this driver you MUST have the
full package from:
Internet:
1. ftp://ftp.ccac.rwth-aachen.de/pub/jr/z8530drv-utils_3.0-3.tar.gz
2. ftp://ftp.pspt.fi/pub/ham/linux/ax25/z8530drv-utils_3.0-3.tar.gz
Please note that the information in this document may be hopelessly outdated.
A new version of the documentation, along with links to other important
Linux Kernel AX.25 documentation and programs, is available on
http://yaina.de/jreuter
Copyright |copy| 1993,2000 by Joerg Reuter DL1BKE <jreuter@yaina.de>
portions Copyright |copy| 1993 Guido ten Dolle PE1NNZ
for the complete copyright notice see >> Copying.Z8530DRV <<
1. Initialization of the driver
===============================
To use the driver, 3 steps must be performed:
1. if compiled as module: loading the module
2. Setup of hardware, MODEM and KISS parameters with sccinit
3. Attach each channel to the Linux kernel AX.25 with "ifconfig"
Unlike the versions below 2.4 this driver is a real network device
driver. If you want to run xNOS instead of our fine kernel AX.25
use a 2.x version (available from above sites) or read the
AX.25-HOWTO on how to emulate a KISS TNC on network device drivers.
1.1 Loading the module
======================
(If you're going to compile the driver as a part of the kernel image,
skip this chapter and continue with 1.2)
Before you can use a module, you'll have to load it with::
insmod scc.o
please read 'man insmod' that comes with module-init-tools.
You should include the insmod in one of the /etc/rc.d/rc.* files,
and don't forget to insert a call of sccinit after that. It
will read your /etc/z8530drv.conf.
1.2. /etc/z8530drv.conf
=======================
To setup all parameters you must run /sbin/sccinit from one
of your rc.*-files. This has to be done BEFORE you can
"ifconfig" an interface. Sccinit reads the file /etc/z8530drv.conf
and sets the hardware, MODEM and KISS parameters. A sample file is
delivered with this package. Change it to your needs.
The file itself consists of two main sections.
1.2.1 configuration of hardware parameters
==========================================
The hardware setup section defines the following parameters for each
Z8530::
chip 1
data_a 0x300 # data port A
ctrl_a 0x304 # control port A
data_b 0x301 # data port B
ctrl_b 0x305 # control port B
irq 5 # IRQ No. 5
pclock 4915200 # clock
board BAYCOM # hardware type
escc no # enhanced SCC chip? (8580/85180/85280)
vector 0 # latch for interrupt vector
special no # address of special function register
option 0 # option to set via sfr
chip
- this is just a delimiter to make sccinit a bit simpler to
program. A parameter has no effect.
data_a
- the address of the data port A of this Z8530 (needed)
ctrl_a
- the address of the control port A (needed)
data_b
- the address of the data port B (needed)
ctrl_b
- the address of the control port B (needed)
irq
- the used IRQ for this chip. Different chips can use different
IRQs or the same. If they share an interrupt, it needs to be
specified within one chip-definition only.
pclock - the clock at the PCLK pin of the Z8530 (option, 4915200 is
default), measured in Hertz
board
- the "type" of the board:
======================= ========
SCC type value
======================= ========
PA0HZP SCC card PA0HZP
EAGLE card EAGLE
PC100 card PC100
PRIMUS-PC (DG9BL) card PRIMUS
BayCom (U)SCC card BAYCOM
======================= ========
escc
- if you want support for ESCC chips (8580, 85180, 85280), set
this to "yes" (option, defaults to "no")
vector
- address of the vector latch (aka "intack port") for PA0HZP
cards. There can be only one vector latch for all chips!
(option, defaults to 0)
special
- address of the special function register on several cards.
(option, defaults to 0)
option - The value you write into that register (option, default is 0)
You can specify up to four chips (8 channels). If this is not enough,
just change::
#define MAXSCC 4
to a higher value.
Example for the BAYCOM USCC:
----------------------------
::
chip 1
data_a 0x300 # data port A
ctrl_a 0x304 # control port A
data_b 0x301 # data port B
ctrl_b 0x305 # control port B
irq 5 # IRQ No. 5 (#)
board BAYCOM # hardware type (*)
#
# SCC chip 2
#
chip 2
data_a 0x302
ctrl_a 0x306
data_b 0x303
ctrl_b 0x307
board BAYCOM
An example for a PA0HZP card:
-----------------------------
::
chip 1
data_a 0x153
data_b 0x151
ctrl_a 0x152
ctrl_b 0x150
irq 9
pclock 4915200
board PA0HZP
vector 0x168
escc no
#
#
#
chip 2
data_a 0x157
data_b 0x155
ctrl_a 0x156
ctrl_b 0x154
irq 9
pclock 4915200
board PA0HZP
vector 0x168
escc no
A DRSI would should probably work with this:
--------------------------------------------
(actually: two DRSI cards...)
::
chip 1
data_a 0x303
data_b 0x301
ctrl_a 0x302
ctrl_b 0x300
irq 7
pclock 4915200
board DRSI
escc no
#
#
#
chip 2
data_a 0x313
data_b 0x311
ctrl_a 0x312
ctrl_b 0x310
irq 7
pclock 4915200
board DRSI
escc no
Note that you cannot use the on-board baudrate generator off DRSI
cards. Use "mode dpll" for clock source (see below).
This is based on information provided by Mike Bilow (and verified
by Paul Helay)
The utility "gencfg"
--------------------
If you only know the parameters for the PE1CHL driver for DOS,
run gencfg. It will generate the correct port addresses (I hope).
Its parameters are exactly the same as the ones you use with
the "attach scc" command in net, except that the string "init" must
not appear. Example::
gencfg 2 0x150 4 2 0 1 0x168 9 4915200
will print a skeleton z8530drv.conf for the OptoSCC to stdout.
::
gencfg 2 0x300 2 4 5 -4 0 7 4915200 0x10
does the same for the BAYCOM USCC card. In my opinion it is much easier
to edit scc_config.h...
1.2.2 channel configuration
===========================
The channel definition is divided into three sub sections for each
channel:
An example for scc0::
# DEVICE
device scc0 # the device for the following params
# MODEM / BUFFERS
speed 1200 # the default baudrate
clock dpll # clock source:
# dpll = normal half duplex operation
# external = MODEM provides own Rx/Tx clock
# divider = use full duplex divider if
# installed (1)
mode nrzi # HDLC encoding mode
# nrzi = 1k2 MODEM, G3RUH 9k6 MODEM
# nrz = DF9IC 9k6 MODEM
#
bufsize 384 # size of buffers. Note that this must include
# the AX.25 header, not only the data field!
# (optional, defaults to 384)
# KISS (Layer 1)
txdelay 36 # (see chapter 1.4)
persist 64
slot 8
tail 8
fulldup 0
wait 12
min 3
maxkey 7
idle 3
maxdef 120
group 0
txoff off
softdcd on
slip off
The order WITHIN these sections is unimportant. The order OF these
sections IS important. The MODEM parameters are set with the first
recognized KISS parameter...
Please note that you can initialize the board only once after boot
(or insmod). You can change all parameters but "mode" and "clock"
later with the Sccparam program or through KISS. Just to avoid
security holes...
(1) this divider is usually mounted on the SCC-PBC (PA0HZP) or not
present at all (BayCom). It feeds back the output of the DPLL
(digital pll) as transmit clock. Using this mode without a divider
installed will normally result in keying the transceiver until
maxkey expires --- of course without sending anything (useful).
2. Attachment of a channel by your AX.25 software
=================================================
2.1 Kernel AX.25
================
To set up an AX.25 device you can simply type::
ifconfig scc0 44.128.1.1 hw ax25 dl0tha-7
This will create a network interface with the IP number 44.128.20.107
and the callsign "dl0tha". If you do not have any IP number (yet) you
can use any of the 44.128.0.0 network. Note that you do not need
axattach. The purpose of axattach (like slattach) is to create a KISS
network device linked to a TTY. Please read the documentation of the
ax25-utils and the AX.25-HOWTO to learn how to set the parameters of
the kernel AX.25.
2.2 NOS, NET and TFKISS
=======================
Since the TTY driver (aka KISS TNC emulation) is gone you need
to emulate the old behaviour. The cost of using these programs is
that you probably need to compile the kernel AX.25, regardless of whether
you actually use it or not. First setup your /etc/ax25/axports,
for example::
9k6 dl0tha-9 9600 255 4 9600 baud port (scc3)
axlink dl0tha-15 38400 255 4 Link to NOS
Now "ifconfig" the scc device::
ifconfig scc3 44.128.1.1 hw ax25 dl0tha-9
You can now axattach a pseudo-TTY::
axattach /dev/ptys0 axlink
and start your NOS and attach /dev/ptys0 there. The problem is that
NOS is reachable only via digipeating through the kernel AX.25
(disastrous on a DAMA controlled channel). To solve this problem,
configure "rxecho" to echo the incoming frames from "9k6" to "axlink"
and outgoing frames from "axlink" to "9k6" and start::
rxecho
Or simply use "kissbridge" coming with z8530drv-utils::
ifconfig scc3 hw ax25 dl0tha-9
kissbridge scc3 /dev/ptys0
3. Adjustment and Display of parameters
=======================================
3.1 Displaying SCC Parameters:
==============================
Once a SCC channel has been attached, the parameter settings and
some statistic information can be shown using the param program::
dl1bke-u:~$ sccstat scc0
Parameters:
speed : 1200 baud
txdelay : 36
persist : 255
slottime : 0
txtail : 8
fulldup : 1
waittime : 12
mintime : 3 sec
maxkeyup : 7 sec
idletime : 3 sec
maxdefer : 120 sec
group : 0x00
txoff : off
softdcd : on
SLIP : off
Status:
HDLC Z8530 Interrupts Buffers
-----------------------------------------------------------------------
Sent : 273 RxOver : 0 RxInts : 125074 Size : 384
Received : 1095 TxUnder: 0 TxInts : 4684 NoSpace : 0
RxErrors : 1591 ExInts : 11776
TxErrors : 0 SpInts : 1503
Tx State : idle
The status info shown is:
============== ==============================================================
Sent number of frames transmitted
Received number of frames received
RxErrors number of receive errors (CRC, ABORT)
TxErrors number of discarded Tx frames (due to various reasons)
Tx State status of the Tx interrupt handler: idle/busy/active/tail (2)
RxOver number of receiver overruns
TxUnder number of transmitter underruns
RxInts number of receiver interrupts
TxInts number of transmitter interrupts
EpInts number of receiver special condition interrupts
SpInts number of external/status interrupts
Size maximum size of an AX.25 frame (*with* AX.25 headers!)
NoSpace number of times a buffer could not get allocated
============== ==============================================================
An overrun is abnormal. If lots of these occur, the product of
baudrate and number of interfaces is too high for the processing
power of your computer. NoSpace errors are unlikely to be caused by the
driver or the kernel AX.25.
3.2 Setting Parameters
======================
The setting of parameters of the emulated KISS TNC is done in the
same way in the SCC driver. You can change parameters by using
the kissparms program from the ax25-utils package or use the program
"sccparam"::
sccparam <device> <paramname> <decimal-|hexadecimal value>
You can change the following parameters:
=========== =====
param value
=========== =====
speed 1200
txdelay 36
persist 255
slottime 0
txtail 8
fulldup 1
waittime 12
mintime 3
maxkeyup 7
idletime 3
maxdefer 120
group 0x00
txoff off
softdcd on
SLIP off
=========== =====
The parameters have the following meaning:
speed:
The baudrate on this channel in bits/sec
Example: sccparam /dev/scc3 speed 9600
txdelay:
The delay (in units of 10 ms) after keying of the
transmitter, until the first byte is sent. This is usually
called "TXDELAY" in a TNC. When 0 is specified, the driver
will just wait until the CTS signal is asserted. This
assumes the presence of a timer or other circuitry in the
MODEM and/or transmitter, that asserts CTS when the
transmitter is ready for data.
A normal value of this parameter is 30-36.
Example: sccparam /dev/scc0 txd 20
persist:
This is the probability that the transmitter will be keyed
when the channel is found to be free. It is a value from 0
to 255, and the probability is (value+1)/256. The value
should be somewhere near 50-60, and should be lowered when
the channel is used more heavily.
Example: sccparam /dev/scc2 persist 20
slottime:
This is the time between samples of the channel. It is
expressed in units of 10 ms. About 200-300 ms (value 20-30)
seems to be a good value.
Example: sccparam /dev/scc0 slot 20
tail:
The time the transmitter will remain keyed after the last
byte of a packet has been transferred to the SCC. This is
necessary because the CRC and a flag still have to leave the
SCC before the transmitter is keyed down. The value depends
on the baudrate selected. A few character times should be
sufficient, e.g. 40ms at 1200 baud. (value 4)
The value of this parameter is in 10 ms units.
Example: sccparam /dev/scc2 4
full:
The full-duplex mode switch. This can be one of the following
values:
0: The interface will operate in CSMA mode (the normal
half-duplex packet radio operation)
1: Fullduplex mode, i.e. the transmitter will be keyed at
any time, without checking the received carrier. It
will be unkeyed when there are no packets to be sent.
2: Like 1, but the transmitter will remain keyed, also
when there are no packets to be sent. Flags will be
sent in that case, until a timeout (parameter 10)
occurs.
Example: sccparam /dev/scc0 fulldup off
wait:
The initial waittime before any transmit attempt, after the
frame has been queue for transmit. This is the length of
the first slot in CSMA mode. In full duplex modes it is
set to 0 for maximum performance.
The value of this parameter is in 10 ms units.
Example: sccparam /dev/scc1 wait 4
maxkey:
The maximal time the transmitter will be keyed to send
packets, in seconds. This can be useful on busy CSMA
channels, to avoid "getting a bad reputation" when you are
generating a lot of traffic. After the specified time has
elapsed, no new frame will be started. Instead, the trans-
mitter will be switched off for a specified time (parameter
min), and then the selected algorithm for keyup will be
started again.
The value 0 as well as "off" will disable this feature,
and allow infinite transmission time.
Example: sccparam /dev/scc0 maxk 20
min:
This is the time the transmitter will be switched off when
the maximum transmission time is exceeded.
Example: sccparam /dev/scc3 min 10
idle:
This parameter specifies the maximum idle time in full duplex
2 mode, in seconds. When no frames have been sent for this
time, the transmitter will be keyed down. A value of 0 is
has same result as the fullduplex mode 1. This parameter
can be disabled.
Example: sccparam /dev/scc2 idle off # transmit forever
maxdefer
This is the maximum time (in seconds) to wait for a free channel
to send. When this timer expires the transmitter will be keyed
IMMEDIATELY. If you love to get trouble with other users you
should set this to a very low value ;-)
Example: sccparam /dev/scc0 maxdefer 240 # 2 minutes
txoff:
When this parameter has the value 0, the transmission of packets
is enable. Otherwise it is disabled.
Example: sccparam /dev/scc2 txoff on
group:
It is possible to build special radio equipment to use more than
one frequency on the same band, e.g. using several receivers and
only one transmitter that can be switched between frequencies.
Also, you can connect several radios that are active on the same
band. In these cases, it is not possible, or not a good idea, to
transmit on more than one frequency. The SCC driver provides a
method to lock transmitters on different interfaces, using the
"param <interface> group <x>" command. This will only work when
you are using CSMA mode (parameter full = 0).
The number <x> must be 0 if you want no group restrictions, and
can be computed as follows to create restricted groups:
<x> is the sum of some OCTAL numbers:
=== =======================================================
200 This transmitter will only be keyed when all other
transmitters in the group are off.
100 This transmitter will only be keyed when the carrier
detect of all other interfaces in the group is off.
0xx A byte that can be used to define different groups.
Interfaces are in the same group, when the logical AND
between their xx values is nonzero.
=== =======================================================
Examples:
When 2 interfaces use group 201, their transmitters will never be
keyed at the same time.
When 2 interfaces use group 101, the transmitters will only key
when both channels are clear at the same time. When group 301,
the transmitters will not be keyed at the same time.
Don't forget to convert the octal numbers into decimal before
you set the parameter.
Example: (to be written)
softdcd:
use a software dcd instead of the real one... Useful for a very
slow squelch.
Example: sccparam /dev/scc0 soft on
4. Problems
===========
If you have tx-problems with your BayCom USCC card please check
the manufacturer of the 8530. SGS chips have a slightly
different timing. Try Zilog... A solution is to write to register 8
instead to the data port, but this won't work with the ESCC chips.
*SIGH!*
A very common problem is that the PTT locks until the maxkeyup timer
expires, although interrupts and clock source are correct. In most
cases compiling the driver with CONFIG_SCC_DELAY (set with
make config) solves the problems. For more hints read the (pseudo) FAQ
and the documentation coming with z8530drv-utils.
I got reports that the driver has problems on some 386-based systems.
(i.e. Amstrad) Those systems have a bogus AT bus timing which will
lead to delayed answers on interrupts. You can recognize these
problems by looking at the output of Sccstat for the suspected
port. If it shows under- and overruns you own such a system.
Delayed processing of received data: This depends on
- the kernel version
- kernel profiling compiled or not
- a high interrupt load
- a high load of the machine --- running X, Xmorph, XV and Povray,
while compiling the kernel... hmm ... even with 32 MB RAM ... ;-)
Or running a named for the whole .ampr.org domain on an 8 MB
box...
- using information from rxecho or kissbridge.
Kernel panics: please read /linux/README and find out if it
really occurred within the scc driver.
If you cannot solve a problem, send me
- a description of the problem,
- information on your hardware (computer system, scc board, modem)
- your kernel version
- the output of cat /proc/net/z8530
4. Thor RLC100
==============
Mysteriously this board seems not to work with the driver. Anyone
got it up-and-running?
Many thanks to Linus Torvalds and Alan Cox for including the driver
in the Linux standard distribution and their support.
::
Joerg Reuter ampr-net: dl1bke@db0pra.ampr.org
AX-25 : DL1BKE @ DB0ABH.#BAY.DEU.EU
Internet: jreuter@yaina.de
WWW : http://yaina.de/jreuter

1
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@ -13,6 +13,5 @@ Contents:
cellular/index cellular/index
ethernet/index ethernet/index
fddi/index fddi/index
hamradio/index
wifi/index wifi/index
wwan/index wwan/index

2
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@ -40,11 +40,9 @@ Contents:
tls-handshake tls-handshake
nfc nfc
6lowpan 6lowpan
6pack
arcnet-hardware arcnet-hardware
arcnet arcnet
atm atm
ax25
bonding bonding
cdc_mbim cdc_mbim
dctcp dctcp

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@ -72,11 +72,8 @@ PG_MAGIC 'P' pg_{read,write}_hdr ``include/uapi/l
APM_BIOS_MAGIC 0x4101 apm_user ``arch/x86/kernel/apm_32.c`` APM_BIOS_MAGIC 0x4101 apm_user ``arch/x86/kernel/apm_32.c``
FASYNC_MAGIC 0x4601 fasync_struct ``include/linux/fs.h`` FASYNC_MAGIC 0x4601 fasync_struct ``include/linux/fs.h``
SLIP_MAGIC 0x5302 slip ``drivers/net/slip/slip.h`` SLIP_MAGIC 0x5302 slip ``drivers/net/slip/slip.h``
BAYCOM_MAGIC 19730510 baycom_state ``drivers/net/hamradio/baycom_epp.c``
HDLCDRV_MAGIC 0x5ac6e778 hdlcdrv_state ``include/linux/hdlcdrv.h``
KV_MAGIC 0x5f4b565f kernel_vars_s ``arch/mips/include/asm/sn/klkernvars.h`` KV_MAGIC 0x5f4b565f kernel_vars_s ``arch/mips/include/asm/sn/klkernvars.h``
CODA_MAGIC 0xC0DAC0DA coda_file_info ``fs/coda/coda_fs_i.h`` CODA_MAGIC 0xC0DAC0DA coda_file_info ``fs/coda/coda_fs_i.h``
YAM_MAGIC 0xF10A7654 yam_port ``drivers/net/hamradio/yam.c``
CCB_MAGIC 0xf2691ad2 ccb ``drivers/scsi/ncr53c8xx.c`` CCB_MAGIC 0xf2691ad2 ccb ``drivers/scsi/ncr53c8xx.c``
QUEUE_MAGIC_FREE 0xf7e1c9a3 queue_entry ``drivers/scsi/arm/queue.c`` QUEUE_MAGIC_FREE 0xf7e1c9a3 queue_entry ``drivers/scsi/arm/queue.c``
QUEUE_MAGIC_USED 0xf7e1cc33 queue_entry ``drivers/scsi/arm/queue.c`` QUEUE_MAGIC_USED 0xf7e1cc33 queue_entry ``drivers/scsi/arm/queue.c``

3
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@ -78,11 +78,8 @@ PG_MAGIC 'P' pg_{read,write}_hdr ``include/linux/
APM_BIOS_MAGIC 0x4101 apm_user ``arch/x86/kernel/apm_32.c`` APM_BIOS_MAGIC 0x4101 apm_user ``arch/x86/kernel/apm_32.c``
FASYNC_MAGIC 0x4601 fasync_struct ``include/linux/fs.h`` FASYNC_MAGIC 0x4601 fasync_struct ``include/linux/fs.h``
SLIP_MAGIC 0x5302 slip ``drivers/net/slip.h`` SLIP_MAGIC 0x5302 slip ``drivers/net/slip.h``
BAYCOM_MAGIC 0x19730510 baycom_state ``drivers/net/baycom_epp.c``
HDLCDRV_MAGIC 0x5ac6e778 hdlcdrv_state ``include/linux/hdlcdrv.h``
KV_MAGIC 0x5f4b565f kernel_vars_s ``arch/mips/include/asm/sn/klkernvars.h`` KV_MAGIC 0x5f4b565f kernel_vars_s ``arch/mips/include/asm/sn/klkernvars.h``
CODA_MAGIC 0xC0DAC0DA coda_file_info ``fs/coda/coda_fs_i.h`` CODA_MAGIC 0xC0DAC0DA coda_file_info ``fs/coda/coda_fs_i.h``
YAM_MAGIC 0xF10A7654 yam_port ``drivers/net/hamradio/yam.c``
CCB_MAGIC 0xf2691ad2 ccb ``drivers/scsi/ncr53c8xx.c`` CCB_MAGIC 0xf2691ad2 ccb ``drivers/scsi/ncr53c8xx.c``
QUEUE_MAGIC_FREE 0xf7e1c9a3 queue_entry ``drivers/scsi/arm/queue.c`` QUEUE_MAGIC_FREE 0xf7e1c9a3 queue_entry ``drivers/scsi/arm/queue.c``
QUEUE_MAGIC_USED 0xf7e1cc33 queue_entry ``drivers/scsi/arm/queue.c`` QUEUE_MAGIC_USED 0xf7e1cc33 queue_entry ``drivers/scsi/arm/queue.c``

3
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@ -77,11 +77,8 @@ PG_MAGIC 'P' pg_{read,write}_hdr ``include/linux/
APM_BIOS_MAGIC 0x4101 apm_user ``arch/x86/kernel/apm_32.c`` APM_BIOS_MAGIC 0x4101 apm_user ``arch/x86/kernel/apm_32.c``
FASYNC_MAGIC 0x4601 fasync_struct ``include/linux/fs.h`` FASYNC_MAGIC 0x4601 fasync_struct ``include/linux/fs.h``
SLIP_MAGIC 0x5302 slip ``drivers/net/slip.h`` SLIP_MAGIC 0x5302 slip ``drivers/net/slip.h``
BAYCOM_MAGIC 0x19730510 baycom_state ``drivers/net/baycom_epp.c``
HDLCDRV_MAGIC 0x5ac6e778 hdlcdrv_state ``include/linux/hdlcdrv.h``
KV_MAGIC 0x5f4b565f kernel_vars_s ``arch/mips/include/asm/sn/klkernvars.h`` KV_MAGIC 0x5f4b565f kernel_vars_s ``arch/mips/include/asm/sn/klkernvars.h``
CODA_MAGIC 0xC0DAC0DA coda_file_info ``fs/coda/coda_fs_i.h`` CODA_MAGIC 0xC0DAC0DA coda_file_info ``fs/coda/coda_fs_i.h``
YAM_MAGIC 0xF10A7654 yam_port ``drivers/net/hamradio/yam.c``
CCB_MAGIC 0xf2691ad2 ccb ``drivers/scsi/ncr53c8xx.c`` CCB_MAGIC 0xf2691ad2 ccb ``drivers/scsi/ncr53c8xx.c``
QUEUE_MAGIC_FREE 0xf7e1c9a3 queue_entry ``drivers/scsi/arm/queue.c`` QUEUE_MAGIC_FREE 0xf7e1c9a3 queue_entry ``drivers/scsi/arm/queue.c``
QUEUE_MAGIC_USED 0xf7e1cc33 queue_entry ``drivers/scsi/arm/queue.c`` QUEUE_MAGIC_USED 0xf7e1cc33 queue_entry ``drivers/scsi/arm/queue.c``

3
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@ -70,11 +70,8 @@ PG_MAGIC 'P' pg_{read,write}_hdr ``include/linux/
APM_BIOS_MAGIC 0x4101 apm_user ``arch/x86/kernel/apm_32.c`` APM_BIOS_MAGIC 0x4101 apm_user ``arch/x86/kernel/apm_32.c``
FASYNC_MAGIC 0x4601 fasync_struct ``include/linux/fs.h`` FASYNC_MAGIC 0x4601 fasync_struct ``include/linux/fs.h``
SLIP_MAGIC 0x5302 slip ``drivers/net/slip.h`` SLIP_MAGIC 0x5302 slip ``drivers/net/slip.h``
BAYCOM_MAGIC 0x19730510 baycom_state ``drivers/net/baycom_epp.c``
HDLCDRV_MAGIC 0x5ac6e778 hdlcdrv_state ``include/linux/hdlcdrv.h``
KV_MAGIC 0x5f4b565f kernel_vars_s ``arch/mips/include/asm/sn/klkernvars.h`` KV_MAGIC 0x5f4b565f kernel_vars_s ``arch/mips/include/asm/sn/klkernvars.h``
CODA_MAGIC 0xC0DAC0DA coda_file_info ``fs/coda/coda_fs_i.h`` CODA_MAGIC 0xC0DAC0DA coda_file_info ``fs/coda/coda_fs_i.h``
YAM_MAGIC 0xF10A7654 yam_port ``drivers/net/hamradio/yam.c``
CCB_MAGIC 0xf2691ad2 ccb ``drivers/scsi/ncr53c8xx.c`` CCB_MAGIC 0xf2691ad2 ccb ``drivers/scsi/ncr53c8xx.c``
QUEUE_MAGIC_FREE 0xf7e1c9a3 queue_entry ``drivers/scsi/arm/queue.c`` QUEUE_MAGIC_FREE 0xf7e1c9a3 queue_entry ``drivers/scsi/arm/queue.c``
QUEUE_MAGIC_USED 0xf7e1cc33 queue_entry ``drivers/scsi/arm/queue.c`` QUEUE_MAGIC_USED 0xf7e1cc33 queue_entry ``drivers/scsi/arm/queue.c``

3
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@ -64,11 +64,8 @@ PG_MAGIC 'P' pg_{read,write}_hdr ``include/linux/
APM_BIOS_MAGIC 0x4101 apm_user ``arch/x86/kernel/apm_32.c`` APM_BIOS_MAGIC 0x4101 apm_user ``arch/x86/kernel/apm_32.c``
FASYNC_MAGIC 0x4601 fasync_struct ``include/linux/fs.h`` FASYNC_MAGIC 0x4601 fasync_struct ``include/linux/fs.h``
SLIP_MAGIC 0x5302 slip ``drivers/net/slip.h`` SLIP_MAGIC 0x5302 slip ``drivers/net/slip.h``
BAYCOM_MAGIC 0x19730510 baycom_state ``drivers/net/baycom_epp.c``
HDLCDRV_MAGIC 0x5ac6e778 hdlcdrv_state ``include/linux/hdlcdrv.h``
KV_MAGIC 0x5f4b565f kernel_vars_s ``arch/mips/include/asm/sn/klkernvars.h`` KV_MAGIC 0x5f4b565f kernel_vars_s ``arch/mips/include/asm/sn/klkernvars.h``
CODA_MAGIC 0xC0DAC0DA coda_file_info ``fs/coda/coda_fs_i.h`` CODA_MAGIC 0xC0DAC0DA coda_file_info ``fs/coda/coda_fs_i.h``
YAM_MAGIC 0xF10A7654 yam_port ``drivers/net/hamradio/yam.c``
CCB_MAGIC 0xf2691ad2 ccb ``drivers/scsi/ncr53c8xx.c`` CCB_MAGIC 0xf2691ad2 ccb ``drivers/scsi/ncr53c8xx.c``
QUEUE_MAGIC_FREE 0xf7e1c9a3 queue_entry ``drivers/scsi/arm/queue.c`` QUEUE_MAGIC_FREE 0xf7e1c9a3 queue_entry ``drivers/scsi/arm/queue.c``
QUEUE_MAGIC_USED 0xf7e1cc33 queue_entry ``drivers/scsi/arm/queue.c`` QUEUE_MAGIC_USED 0xf7e1cc33 queue_entry ``drivers/scsi/arm/queue.c``

73
MAINTAINERS
View File

@ -102,12 +102,6 @@ F: Documentation/networking/6lowpan.rst
F: include/net/6lowpan.h F: include/net/6lowpan.h
F: net/6lowpan/ F: net/6lowpan/
6PACK NETWORK DRIVER FOR AX.25
M: Andreas Koensgen <ajk@comnets.uni-bremen.de>
L: linux-hams@vger.kernel.org
S: Maintained
F: drivers/net/hamradio/6pack.c
802.11 (including CFG80211/NL80211) 802.11 (including CFG80211/NL80211)
M: Johannes Berg <johannes@sipsolutions.net> M: Johannes Berg <johannes@sipsolutions.net>
L: linux-wireless@vger.kernel.org L: linux-wireless@vger.kernel.org
@ -4280,14 +4274,6 @@ S: Maintained
F: Documentation/devicetree/bindings/leds/backlight/awinic,aw99706.yaml F: Documentation/devicetree/bindings/leds/backlight/awinic,aw99706.yaml
F: drivers/video/backlight/aw99706.c F: drivers/video/backlight/aw99706.c
AX.25 NETWORK LAYER
L: linux-hams@vger.kernel.org
S: Orphan
W: https://linux-ax25.in-berlin.de
F: include/net/ax25.h
F: include/uapi/linux/ax25.h
F: net/ax25/
AXENTIA ARM DEVICES AXENTIA ARM DEVICES
M: Peter Rosin <peda@axentia.se> M: Peter Rosin <peda@axentia.se>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers) L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
@ -4429,13 +4415,6 @@ F: include/uapi/linux/batadv_packet.h
F: include/uapi/linux/batman_adv.h F: include/uapi/linux/batman_adv.h
F: net/batman-adv/ F: net/batman-adv/
BAYCOM/HDLCDRV DRIVERS FOR AX.25
M: Thomas Sailer <t.sailer@alumni.ethz.ch>
L: linux-hams@vger.kernel.org
S: Maintained
W: http://www.baycom.org/~tom/ham/ham.html
F: drivers/net/hamradio/baycom*
BCACHE (BLOCK LAYER CACHE) BCACHE (BLOCK LAYER CACHE)
M: Coly Li <colyli@fnnas.com> M: Coly Li <colyli@fnnas.com>
M: Kent Overstreet <kent.overstreet@linux.dev> M: Kent Overstreet <kent.overstreet@linux.dev>
@ -7019,20 +6998,6 @@ S: Maintained
F: drivers/rtc/rtc-ds1685.c F: drivers/rtc/rtc-ds1685.c
F: include/linux/rtc/ds1685.h F: include/linux/rtc/ds1685.h
DAMA SLAVE for AX.25
M: Joerg Reuter <jreuter@yaina.de>
L: linux-hams@vger.kernel.org
S: Maintained
W: http://yaina.de/jreuter/
W: http://www.qsl.net/dl1bke/
F: net/ax25/af_ax25.c
F: net/ax25/ax25_dev.c
F: net/ax25/ax25_ds_*
F: net/ax25/ax25_in.c
F: net/ax25/ax25_out.c
F: net/ax25/ax25_timer.c
F: net/ax25/sysctl_net_ax25.c
DASHARO ACPI PLATFORM DRIVER DASHARO ACPI PLATFORM DRIVER
M: Michał Kopeć <michal.kopec@3mdeb.com> M: Michał Kopeć <michal.kopec@3mdeb.com>
S: Maintained S: Maintained
@ -11443,11 +11408,6 @@ T: git https://github.com/Rust-for-Linux/linux.git timekeeping-next
F: rust/kernel/time.rs F: rust/kernel/time.rs
F: rust/kernel/time/ F: rust/kernel/time/
HIGH-SPEED SCC DRIVER FOR AX.25
L: linux-hams@vger.kernel.org
S: Orphan
F: drivers/net/hamradio/scc.c
HIGHPOINT ROCKETRAID 3xxx RAID DRIVER HIGHPOINT ROCKETRAID 3xxx RAID DRIVER
M: HighPoint Linux Team <linux@highpoint-tech.com> M: HighPoint Linux Team <linux@highpoint-tech.com>
S: Supported S: Supported
@ -18271,14 +18231,6 @@ F: net/bridge/br_netfilter*.c
F: net/netfilter/ F: net/netfilter/
F: tools/testing/selftests/net/netfilter/ F: tools/testing/selftests/net/netfilter/
NETROM NETWORK LAYER
L: linux-hams@vger.kernel.org
S: Orphan
W: https://linux-ax25.in-berlin.de
F: include/net/netrom.h
F: include/uapi/linux/netrom.h
F: net/netrom/
NETRONIX EMBEDDED CONTROLLER NETRONIX EMBEDDED CONTROLLER
M: Jonathan Neuschäfer <j.neuschaefer@gmx.net> M: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
S: Maintained S: Maintained
@ -23071,14 +23023,6 @@ F: include/linux/mfd/rohm-bd96802.h
F: include/linux/mfd/rohm-generic.h F: include/linux/mfd/rohm-generic.h
F: include/linux/mfd/rohm-shared.h F: include/linux/mfd/rohm-shared.h
ROSE NETWORK LAYER
L: linux-hams@vger.kernel.org
S: Orphan
W: https://linux-ax25.in-berlin.de
F: include/net/rose.h
F: include/uapi/linux/rose.h
F: net/rose/
ROTATION DRIVER FOR ALLWINNER A83T ROTATION DRIVER FOR ALLWINNER A83T
M: Jernej Skrabec <jernej.skrabec@gmail.com> M: Jernej Skrabec <jernej.skrabec@gmail.com>
L: linux-media@vger.kernel.org L: linux-media@vger.kernel.org
@ -29104,13 +29048,6 @@ F: lib/decompress_unxz.c
F: lib/xz/ F: lib/xz/
F: scripts/xz_wrap.sh F: scripts/xz_wrap.sh
YAM DRIVER FOR AX.25
M: Jean-Paul Roubelat <jpr@f6fbb.org>
L: linux-hams@vger.kernel.org
S: Maintained
F: drivers/net/hamradio/yam*
F: include/linux/yam.h
YAMA SECURITY MODULE YAMA SECURITY MODULE
M: Kees Cook <kees@kernel.org> M: Kees Cook <kees@kernel.org>
S: Supported S: Supported
@ -29132,16 +29069,6 @@ S: Maintained
F: Documentation/input/devices/yealink.rst F: Documentation/input/devices/yealink.rst
F: drivers/input/misc/yealink.* F: drivers/input/misc/yealink.*
Z8530 DRIVER FOR AX.25
M: Joerg Reuter <jreuter@yaina.de>
L: linux-hams@vger.kernel.org
S: Maintained
W: http://yaina.de/jreuter/
W: http://www.qsl.net/dl1bke/
F: Documentation/networking/device_drivers/hamradio/z8530drv.rst
F: drivers/net/hamradio/*scc.c
F: drivers/net/hamradio/z8530.h
ZD1211RW WIRELESS DRIVER ZD1211RW WIRELESS DRIVER
L: linux-wireless@vger.kernel.org L: linux-wireless@vger.kernel.org
S: Orphan S: Orphan

1
arch/mips/configs/bcm47xx_defconfig
View File

@ -28,7 +28,6 @@ CONFIG_NETFILTER=y
CONFIG_VLAN_8021Q=y CONFIG_VLAN_8021Q=y
CONFIG_NET_SCHED=y CONFIG_NET_SCHED=y
CONFIG_NET_SCH_FQ_CODEL=y CONFIG_NET_SCH_FQ_CODEL=y
CONFIG_HAMRADIO=y
CONFIG_CFG80211=y CONFIG_CFG80211=y
CONFIG_MAC80211=y CONFIG_MAC80211=y
CONFIG_MTD=y CONFIG_MTD=y

10
arch/mips/configs/bigsur_defconfig
View File

@ -84,16 +84,6 @@ CONFIG_IP_VS_FTP=m
CONFIG_BRIDGE=m CONFIG_BRIDGE=m
CONFIG_VLAN_8021Q=m CONFIG_VLAN_8021Q=m
CONFIG_VLAN_8021Q_GVRP=y CONFIG_VLAN_8021Q_GVRP=y
CONFIG_HAMRADIO=y
CONFIG_AX25=m
CONFIG_NETROM=m
CONFIG_ROSE=m
CONFIG_MKISS=m
CONFIG_6PACK=m
CONFIG_BPQETHER=m
CONFIG_BAYCOM_SER_FDX=m
CONFIG_BAYCOM_SER_HDX=m
CONFIG_YAM=m
CONFIG_FW_LOADER=m CONFIG_FW_LOADER=m
CONFIG_BLK_DEV_LOOP=m CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_NBD=m CONFIG_BLK_DEV_NBD=m

11
arch/mips/configs/gpr_defconfig
View File

@ -130,17 +130,6 @@ CONFIG_NET_EMATCH_TEXT=m
CONFIG_NET_CLS_ACT=y CONFIG_NET_CLS_ACT=y
CONFIG_NET_ACT_POLICE=y CONFIG_NET_ACT_POLICE=y
CONFIG_NET_PKTGEN=m CONFIG_NET_PKTGEN=m
CONFIG_HAMRADIO=y
CONFIG_AX25=m
# CONFIG_AX25_DAMA_SLAVE is not set
CONFIG_NETROM=m
CONFIG_ROSE=m
CONFIG_MKISS=m
CONFIG_6PACK=m
CONFIG_BPQETHER=m
CONFIG_BAYCOM_SER_FDX=m
CONFIG_BAYCOM_SER_HDX=m
CONFIG_YAM=m
CONFIG_CFG80211=y CONFIG_CFG80211=y
CONFIG_MAC80211=y CONFIG_MAC80211=y
CONFIG_MTD=y CONFIG_MTD=y

11
arch/mips/configs/mtx1_defconfig
View File

@ -176,17 +176,6 @@ CONFIG_NET_EMATCH_TEXT=m
CONFIG_NET_CLS_ACT=y CONFIG_NET_CLS_ACT=y
CONFIG_NET_ACT_POLICE=y CONFIG_NET_ACT_POLICE=y
CONFIG_NET_PKTGEN=m CONFIG_NET_PKTGEN=m
CONFIG_HAMRADIO=y
CONFIG_AX25=m
# CONFIG_AX25_DAMA_SLAVE is not set
CONFIG_NETROM=m
CONFIG_ROSE=m
CONFIG_MKISS=m
CONFIG_6PACK=m
CONFIG_BPQETHER=m
CONFIG_BAYCOM_SER_FDX=m
CONFIG_BAYCOM_SER_HDX=m
CONFIG_YAM=m
CONFIG_BT=m CONFIG_BT=m
CONFIG_BT_RFCOMM=m CONFIG_BT_RFCOMM=m
CONFIG_BT_RFCOMM_TTY=y CONFIG_BT_RFCOMM_TTY=y

1
arch/mips/configs/rb532_defconfig
View File

@ -95,7 +95,6 @@ CONFIG_NET_ACT_GACT=m
CONFIG_GACT_PROB=y CONFIG_GACT_PROB=y
CONFIG_NET_ACT_MIRRED=m CONFIG_NET_ACT_MIRRED=m
CONFIG_NET_ACT_PEDIT=m CONFIG_NET_ACT_PEDIT=m
CONFIG_HAMRADIO=y
CONFIG_MTD=y CONFIG_MTD=y
CONFIG_MTD_BLOCK=y CONFIG_MTD_BLOCK=y
CONFIG_MTD_BLOCK2MTD=y CONFIG_MTD_BLOCK2MTD=y

7
arch/mips/configs/rm200_defconfig
View File

@ -147,13 +147,6 @@ CONFIG_NET_CLS_FW=m
CONFIG_NET_CLS_U32=m CONFIG_NET_CLS_U32=m
CONFIG_NET_CLS_RSVP=m CONFIG_NET_CLS_RSVP=m
CONFIG_NET_CLS_RSVP6=m CONFIG_NET_CLS_RSVP6=m
CONFIG_HAMRADIO=y
CONFIG_AX25=m
CONFIG_NETROM=m
CONFIG_ROSE=m
CONFIG_MKISS=m
CONFIG_6PACK=m
CONFIG_BPQETHER=m
CONFIG_CONNECTOR=m CONFIG_CONNECTOR=m
CONFIG_PARPORT=m CONFIG_PARPORT=m
CONFIG_PARPORT_PC=m CONFIG_PARPORT_PC=m

1
arch/mips/configs/rt305x_defconfig
View File

@ -64,7 +64,6 @@ CONFIG_BRIDGE=y
# CONFIG_BRIDGE_IGMP_SNOOPING is not set # CONFIG_BRIDGE_IGMP_SNOOPING is not set
CONFIG_VLAN_8021Q=y CONFIG_VLAN_8021Q=y
CONFIG_NET_SCHED=y CONFIG_NET_SCHED=y
CONFIG_HAMRADIO=y
CONFIG_MTD=y CONFIG_MTD=y
CONFIG_MTD_CMDLINE_PARTS=y CONFIG_MTD_CMDLINE_PARTS=y
CONFIG_MTD_BLOCK=y CONFIG_MTD_BLOCK=y

1
arch/mips/configs/xway_defconfig
View File

@ -66,7 +66,6 @@ CONFIG_BRIDGE=y
# CONFIG_BRIDGE_IGMP_SNOOPING is not set # CONFIG_BRIDGE_IGMP_SNOOPING is not set
CONFIG_VLAN_8021Q=y CONFIG_VLAN_8021Q=y
CONFIG_NET_SCHED=y CONFIG_NET_SCHED=y
CONFIG_HAMRADIO=y
CONFIG_MTD=y CONFIG_MTD=y
CONFIG_MTD_CMDLINE_PARTS=y CONFIG_MTD_CMDLINE_PARTS=y
CONFIG_MTD_BLOCK=y CONFIG_MTD_BLOCK=y

1
drivers/net/Makefile
View File

@ -54,7 +54,6 @@ obj-y += dsa/
endif endif
obj-$(CONFIG_ETHERNET) += ethernet/ obj-$(CONFIG_ETHERNET) += ethernet/
obj-$(CONFIG_FDDI) += fddi/ obj-$(CONFIG_FDDI) += fddi/
obj-$(CONFIG_HAMRADIO) += hamradio/
obj-$(CONFIG_QCOM_IPA) += ipa/ obj-$(CONFIG_QCOM_IPA) += ipa/
obj-$(CONFIG_PLIP) += plip/ obj-$(CONFIG_PLIP) += plip/
obj-$(CONFIG_PPP) += ppp/ obj-$(CONFIG_PPP) += ppp/

912
drivers/net/hamradio/6pack.c
View File

@ -1,912 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* 6pack.c This module implements the 6pack protocol for kernel-based
* devices like TTY. It interfaces between a raw TTY and the
* kernel's AX.25 protocol layers.
*
* Authors: Andreas Könsgen <ajk@comnets.uni-bremen.de>
* Ralf Baechle DL5RB <ralf@linux-mips.org>
*
* Quite a lot of stuff "stolen" by Joerg Reuter from slip.c, written by
*
* Laurence Culhane, <loz@holmes.demon.co.uk>
* Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
*/
#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/bitops.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/in.h>
#include <linux/tty.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <net/ax25.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/rtnetlink.h>
#include <linux/spinlock.h>
#include <linux/if_arp.h>
#include <linux/init.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/semaphore.h>
#include <linux/refcount.h>
/* sixpack priority commands */
#define SIXP_SEOF 0x40 /* start and end of a 6pack frame */
#define SIXP_TX_URUN 0x48 /* transmit overrun */
#define SIXP_RX_ORUN 0x50 /* receive overrun */
#define SIXP_RX_BUF_OVL 0x58 /* receive buffer overflow */
#define SIXP_CHKSUM 0xFF /* valid checksum of a 6pack frame */
/* masks to get certain bits out of the status bytes sent by the TNC */
#define SIXP_CMD_MASK 0xC0
#define SIXP_CHN_MASK 0x07
#define SIXP_PRIO_CMD_MASK 0x80
#define SIXP_STD_CMD_MASK 0x40
#define SIXP_PRIO_DATA_MASK 0x38
#define SIXP_TX_MASK 0x20
#define SIXP_RX_MASK 0x10
#define SIXP_RX_DCD_MASK 0x18
#define SIXP_LEDS_ON 0x78
#define SIXP_LEDS_OFF 0x60
#define SIXP_CON 0x08
#define SIXP_STA 0x10
#define SIXP_FOUND_TNC 0xe9
#define SIXP_CON_ON 0x68
#define SIXP_DCD_MASK 0x08
#define SIXP_DAMA_OFF 0
/* default level 2 parameters */
#define SIXP_TXDELAY 25 /* 250 ms */
#define SIXP_PERSIST 50 /* in 256ths */
#define SIXP_SLOTTIME 10 /* 100 ms */
#define SIXP_INIT_RESYNC_TIMEOUT (3*HZ/2) /* in 1 s */
#define SIXP_RESYNC_TIMEOUT 5*HZ /* in 1 s */
/* 6pack configuration. */
#define SIXP_NRUNIT 31 /* MAX number of 6pack channels */
#define SIXP_MTU 256 /* Default MTU */
enum sixpack_flags {
SIXPF_ERROR, /* Parity, etc. error */
};
struct sixpack {
/* Various fields. */
struct tty_struct *tty; /* ptr to TTY structure */
struct net_device *dev; /* easy for intr handling */
/* These are pointers to the malloc()ed frame buffers. */
int rcount; /* received chars counter */
unsigned char *xbuff; /* transmitter buffer */
unsigned char *xhead; /* next byte to XMIT */
int xleft; /* bytes left in XMIT queue */
u8 raw_buf[4];
u8 cooked_buf[400];
unsigned int rx_count;
unsigned int rx_count_cooked;
spinlock_t rxlock;
unsigned long flags; /* Flag values/ mode etc */
unsigned char mode; /* 6pack mode */
/* 6pack stuff */
unsigned char tx_delay;
unsigned char persistence;
unsigned char slottime;
unsigned char duplex;
unsigned char led_state;
u8 status;
u8 status1;
unsigned char status2;
unsigned char tx_enable;
unsigned char tnc_state;
struct timer_list tx_t;
struct timer_list resync_t;
spinlock_t lock;
};
#define AX25_6PACK_HEADER_LEN 0
static void sixpack_decode(struct sixpack *, const u8 *, size_t);
static int encode_sixpack(unsigned char *, unsigned char *, int, unsigned char);
/*
* Perform the persistence/slottime algorithm for CSMA access. If the
* persistence check was successful, write the data to the serial driver.
* Note that in case of DAMA operation, the data is not sent here.
*/
static void sp_xmit_on_air(struct timer_list *t)
{
struct sixpack *sp = timer_container_of(sp, t, tx_t);
int actual, when = sp->slottime;
static unsigned char random;
random = random * 17 + 41;
if (((sp->status1 & SIXP_DCD_MASK) == 0) && (random < sp->persistence)) {
sp->led_state = 0x70;
sp->tty->ops->write(sp->tty, &sp->led_state, 1);
sp->tx_enable = 1;
actual = sp->tty->ops->write(sp->tty, sp->xbuff, sp->status2);
sp->xleft -= actual;
sp->xhead += actual;
sp->led_state = 0x60;
sp->tty->ops->write(sp->tty, &sp->led_state, 1);
sp->status2 = 0;
} else
mod_timer(&sp->tx_t, jiffies + ((when + 1) * HZ) / 100);
}
/* ----> 6pack timer interrupt handler and friends. <---- */
/* Encapsulate one AX.25 frame and stuff into a TTY queue. */
static void sp_encaps(struct sixpack *sp, unsigned char *icp, int len)
{
unsigned char *msg, *p = icp;
int actual, count;
if (len > AX25_MTU + 73) {
msg = "oversized transmit packet!";
goto out_drop;
}
if (p[0] > 5) {
msg = "invalid KISS command";
goto out_drop;
}
if ((p[0] != 0) && (len > 2)) {
msg = "KISS control packet too long";
goto out_drop;
}
if ((p[0] == 0) && (len < 15)) {
msg = "bad AX.25 packet to transmit";
goto out_drop;
}
count = encode_sixpack(p, sp->xbuff, len, sp->tx_delay);
set_bit(TTY_DO_WRITE_WAKEUP, &sp->tty->flags);
switch (p[0]) {
case 1: sp->tx_delay = p[1];
return;
case 2: sp->persistence = p[1];
return;
case 3: sp->slottime = p[1];
return;
case 4: /* ignored */
return;
case 5: sp->duplex = p[1];
return;
}
if (p[0] != 0)
return;
/*
* In case of fullduplex or DAMA operation, we don't take care about the
* state of the DCD or of any timers, as the determination of the
* correct time to send is the job of the AX.25 layer. We send
* immediately after data has arrived.
*/
if (sp->duplex == 1) {
sp->led_state = 0x70;
sp->tty->ops->write(sp->tty, &sp->led_state, 1);
sp->tx_enable = 1;
actual = sp->tty->ops->write(sp->tty, sp->xbuff, count);
sp->xleft = count - actual;
sp->xhead = sp->xbuff + actual;
sp->led_state = 0x60;
sp->tty->ops->write(sp->tty, &sp->led_state, 1);
} else {
sp->xleft = count;
sp->xhead = sp->xbuff;
sp->status2 = count;
sp_xmit_on_air(&sp->tx_t);
}
return;
out_drop:
sp->dev->stats.tx_dropped++;
netif_start_queue(sp->dev);
if (net_ratelimit())
printk(KERN_DEBUG "%s: %s - dropped.\n", sp->dev->name, msg);
}
/* Encapsulate an IP datagram and kick it into a TTY queue. */
static netdev_tx_t sp_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct sixpack *sp = netdev_priv(dev);
if (skb->protocol == htons(ETH_P_IP))
return ax25_ip_xmit(skb);
spin_lock_bh(&sp->lock);
/* We were not busy, so we are now... :-) */
netif_stop_queue(dev);
dev->stats.tx_bytes += skb->len;
sp_encaps(sp, skb->data, skb->len);
spin_unlock_bh(&sp->lock);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
static int sp_open_dev(struct net_device *dev)
{
struct sixpack *sp = netdev_priv(dev);
if (sp->tty == NULL)
return -ENODEV;
return 0;
}
/* Close the low-level part of the 6pack channel. */
static int sp_close(struct net_device *dev)
{
struct sixpack *sp = netdev_priv(dev);
spin_lock_bh(&sp->lock);
if (sp->tty) {
/* TTY discipline is running. */
clear_bit(TTY_DO_WRITE_WAKEUP, &sp->tty->flags);
}
netif_stop_queue(dev);
spin_unlock_bh(&sp->lock);
return 0;
}
static int sp_set_mac_address(struct net_device *dev, void *addr)
{
struct sockaddr_ax25 *sa = addr;
netif_tx_lock_bh(dev);
netif_addr_lock(dev);
__dev_addr_set(dev, &sa->sax25_call, AX25_ADDR_LEN);
netif_addr_unlock(dev);
netif_tx_unlock_bh(dev);
return 0;
}
static const struct net_device_ops sp_netdev_ops = {
.ndo_open = sp_open_dev,
.ndo_stop = sp_close,
.ndo_start_xmit = sp_xmit,
.ndo_set_mac_address = sp_set_mac_address,
};
static void sp_setup(struct net_device *dev)
{
/* Finish setting up the DEVICE info. */
dev->netdev_ops = &sp_netdev_ops;
dev->mtu = SIXP_MTU;
dev->hard_header_len = AX25_MAX_HEADER_LEN;
dev->header_ops = &ax25_header_ops;
dev->addr_len = AX25_ADDR_LEN;
dev->type = ARPHRD_AX25;
dev->tx_queue_len = 10;
/* Only activated in AX.25 mode */
memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
dev_addr_set(dev, (u8 *)&ax25_defaddr);
dev->flags = 0;
}
/* Send one completely decapsulated IP datagram to the IP layer. */
/*
* This is the routine that sends the received data to the kernel AX.25.
* 'cmd' is the KISS command. For AX.25 data, it is zero.
*/
static void sp_bump(struct sixpack *sp, char cmd)
{
struct sk_buff *skb;
int count;
u8 *ptr;
count = sp->rcount + 1;
sp->dev->stats.rx_bytes += count;
if ((skb = dev_alloc_skb(count + 1)) == NULL)
goto out_mem;
ptr = skb_put(skb, count + 1);
*ptr++ = cmd; /* KISS command */
memcpy(ptr, sp->cooked_buf + 1, count);
skb->protocol = ax25_type_trans(skb, sp->dev);
netif_rx(skb);
sp->dev->stats.rx_packets++;
return;
out_mem:
sp->dev->stats.rx_dropped++;
}
/* ----------------------------------------------------------------------- */
/*
* Called by the TTY driver when there's room for more data. If we have
* more packets to send, we send them here.
*/
static void sixpack_write_wakeup(struct tty_struct *tty)
{
struct sixpack *sp = tty->disc_data;
int actual;
if (!sp)
return;
if (sp->xleft <= 0) {
/* Now serial buffer is almost free & we can start
* transmission of another packet */
sp->dev->stats.tx_packets++;
clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
sp->tx_enable = 0;
netif_wake_queue(sp->dev);
return;
}
if (sp->tx_enable) {
actual = tty->ops->write(tty, sp->xhead, sp->xleft);
sp->xleft -= actual;
sp->xhead += actual;
}
}
/* ----------------------------------------------------------------------- */
/*
* Handle the 'receiver data ready' interrupt.
* This function is called by the tty module in the kernel when
* a block of 6pack data has been received, which can now be decapsulated
* and sent on to some IP layer for further processing.
*/
static void sixpack_receive_buf(struct tty_struct *tty, const u8 *cp,
const u8 *fp, size_t count)
{
struct sixpack *sp;
if (!count)
return;
sp = tty->disc_data;
if (!sp)
return;
/* Read the characters out of the buffer */
while (count--) {
if (fp && *fp++) {
if (!test_and_set_bit(SIXPF_ERROR, &sp->flags))
sp->dev->stats.rx_errors++;
cp++;
continue;
}
sixpack_decode(sp, cp, 1);
cp++;
}
tty_unthrottle(tty);
}
/*
* Try to resync the TNC. Called by the resync timer defined in
* decode_prio_command
*/
#define TNC_UNINITIALIZED 0
#define TNC_UNSYNC_STARTUP 1
#define TNC_UNSYNCED 2
#define TNC_IN_SYNC 3
static void __tnc_set_sync_state(struct sixpack *sp, int new_tnc_state)
{
char *msg;
switch (new_tnc_state) {
default: /* gcc oh piece-o-crap ... */
case TNC_UNSYNC_STARTUP:
msg = "Synchronizing with TNC";
break;
case TNC_UNSYNCED:
msg = "Lost synchronization with TNC\n";
break;
case TNC_IN_SYNC:
msg = "Found TNC";
break;
}
sp->tnc_state = new_tnc_state;
printk(KERN_INFO "%s: %s\n", sp->dev->name, msg);
}
static inline void tnc_set_sync_state(struct sixpack *sp, int new_tnc_state)
{
int old_tnc_state = sp->tnc_state;
if (old_tnc_state != new_tnc_state)
__tnc_set_sync_state(sp, new_tnc_state);
}
static void resync_tnc(struct timer_list *t)
{
struct sixpack *sp = timer_container_of(sp, t, resync_t);
static char resync_cmd = 0xe8;
/* clear any data that might have been received */
sp->rx_count = 0;
sp->rx_count_cooked = 0;
/* reset state machine */
sp->status = 1;
sp->status1 = 1;
sp->status2 = 0;
/* resync the TNC */
sp->led_state = 0x60;
sp->tty->ops->write(sp->tty, &sp->led_state, 1);
sp->tty->ops->write(sp->tty, &resync_cmd, 1);
/* Start resync timer again -- the TNC might be still absent */
mod_timer(&sp->resync_t, jiffies + SIXP_RESYNC_TIMEOUT);
}
static inline int tnc_init(struct sixpack *sp)
{
unsigned char inbyte = 0xe8;
tnc_set_sync_state(sp, TNC_UNSYNC_STARTUP);
sp->tty->ops->write(sp->tty, &inbyte, 1);
mod_timer(&sp->resync_t, jiffies + SIXP_RESYNC_TIMEOUT);
return 0;
}
/*
* Open the high-level part of the 6pack channel.
* This function is called by the TTY module when the
* 6pack line discipline is called for. Because we are
* sure the tty line exists, we only have to link it to
* a free 6pcack channel...
*/
static int sixpack_open(struct tty_struct *tty)
{
char *xbuff = NULL;
struct net_device *dev;
struct sixpack *sp;
unsigned long len;
int err = 0;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (tty->ops->write == NULL)
return -EOPNOTSUPP;
dev = alloc_netdev(sizeof(struct sixpack), "sp%d", NET_NAME_UNKNOWN,
sp_setup);
if (!dev) {
err = -ENOMEM;
goto out;
}
sp = netdev_priv(dev);
sp->dev = dev;
spin_lock_init(&sp->lock);
spin_lock_init(&sp->rxlock);
/* !!! length of the buffers. MTU is IP MTU, not PACLEN! */
len = dev->mtu * 2;
xbuff = kmalloc(len + 4, GFP_KERNEL);
if (xbuff == NULL) {
err = -ENOBUFS;
goto out_free;
}
spin_lock_bh(&sp->lock);
sp->tty = tty;
sp->xbuff = xbuff;
sp->rcount = 0;
sp->rx_count = 0;
sp->rx_count_cooked = 0;
sp->xleft = 0;
sp->flags = 0; /* Clear ESCAPE & ERROR flags */
sp->duplex = 0;
sp->tx_delay = SIXP_TXDELAY;
sp->persistence = SIXP_PERSIST;
sp->slottime = SIXP_SLOTTIME;
sp->led_state = 0x60;
sp->status = 1;
sp->status1 = 1;
sp->status2 = 0;
sp->tx_enable = 0;
netif_start_queue(dev);
timer_setup(&sp->tx_t, sp_xmit_on_air, 0);
timer_setup(&sp->resync_t, resync_tnc, 0);
spin_unlock_bh(&sp->lock);
/* Done. We have linked the TTY line to a channel. */
tty->disc_data = sp;
tty->receive_room = 65536;
/* Now we're ready to register. */
err = register_netdev(dev);
if (err)
goto out_free;
tnc_init(sp);
return 0;
out_free:
kfree(xbuff);
free_netdev(dev);
out:
return err;
}
/*
* Close down a 6pack channel.
* This means flushing out any pending queues, and then restoring the
* TTY line discipline to what it was before it got hooked to 6pack
* (which usually is TTY again).
*/
static void sixpack_close(struct tty_struct *tty)
{
struct sixpack *sp;
sp = tty->disc_data;
if (!sp)
return;
tty->disc_data = NULL;
/* We must stop the queue to avoid potentially scribbling
* on the free buffers. The sp->dead completion is not sufficient
* to protect us from sp->xbuff access.
*/
netif_stop_queue(sp->dev);
unregister_netdev(sp->dev);
timer_delete_sync(&sp->tx_t);
timer_delete_sync(&sp->resync_t);
/* Free all 6pack frame buffers after unreg. */
kfree(sp->xbuff);
free_netdev(sp->dev);
}
/* Perform I/O control on an active 6pack channel. */
static int sixpack_ioctl(struct tty_struct *tty, unsigned int cmd,
unsigned long arg)
{
struct sixpack *sp = tty->disc_data;
struct net_device *dev;
unsigned int tmp, err;
if (!sp)
return -ENXIO;
dev = sp->dev;
switch(cmd) {
case SIOCGIFNAME:
err = copy_to_user((void __user *) arg, dev->name,
strlen(dev->name) + 1) ? -EFAULT : 0;
break;
case SIOCGIFENCAP:
err = put_user(0, (int __user *) arg);
break;
case SIOCSIFENCAP:
if (get_user(tmp, (int __user *) arg)) {
err = -EFAULT;
break;
}
sp->mode = tmp;
dev->addr_len = AX25_ADDR_LEN;
dev->hard_header_len = AX25_KISS_HEADER_LEN +
AX25_MAX_HEADER_LEN + 3;
dev->type = ARPHRD_AX25;
err = 0;
break;
case SIOCSIFHWADDR: {
char addr[AX25_ADDR_LEN];
if (copy_from_user(&addr,
(void __user *)arg, AX25_ADDR_LEN)) {
err = -EFAULT;
break;
}
netif_tx_lock_bh(dev);
__dev_addr_set(dev, &addr, AX25_ADDR_LEN);
netif_tx_unlock_bh(dev);
err = 0;
break;
}
default:
err = tty_mode_ioctl(tty, cmd, arg);
}
return err;
}
static struct tty_ldisc_ops sp_ldisc = {
.owner = THIS_MODULE,
.num = N_6PACK,
.name = "6pack",
.open = sixpack_open,
.close = sixpack_close,
.ioctl = sixpack_ioctl,
.receive_buf = sixpack_receive_buf,
.write_wakeup = sixpack_write_wakeup,
};
/* Initialize 6pack control device -- register 6pack line discipline */
static int __init sixpack_init_driver(void)
{
int status;
/* Register the provided line protocol discipline */
status = tty_register_ldisc(&sp_ldisc);
if (status)
pr_err("6pack: can't register line discipline (err = %d)\n", status);
return status;
}
static void __exit sixpack_exit_driver(void)
{
tty_unregister_ldisc(&sp_ldisc);
}
/* encode an AX.25 packet into 6pack */
static int encode_sixpack(unsigned char *tx_buf, unsigned char *tx_buf_raw,
int length, unsigned char tx_delay)
{
int count = 0;
unsigned char checksum = 0, buf[400];
int raw_count = 0;
tx_buf_raw[raw_count++] = SIXP_PRIO_CMD_MASK | SIXP_TX_MASK;
tx_buf_raw[raw_count++] = SIXP_SEOF;
buf[0] = tx_delay;
for (count = 1; count < length; count++)
buf[count] = tx_buf[count];
for (count = 0; count < length; count++)
checksum += buf[count];
buf[length] = (unsigned char) 0xff - checksum;
for (count = 0; count <= length; count++) {
if ((count % 3) == 0) {
tx_buf_raw[raw_count++] = (buf[count] & 0x3f);
tx_buf_raw[raw_count] = ((buf[count] >> 2) & 0x30);
} else if ((count % 3) == 1) {
tx_buf_raw[raw_count++] |= (buf[count] & 0x0f);
tx_buf_raw[raw_count] = ((buf[count] >> 2) & 0x3c);
} else {
tx_buf_raw[raw_count++] |= (buf[count] & 0x03);
tx_buf_raw[raw_count++] = (buf[count] >> 2);
}
}
if ((length % 3) != 2)
raw_count++;
tx_buf_raw[raw_count++] = SIXP_SEOF;
return raw_count;
}
/* decode 4 sixpack-encoded bytes into 3 data bytes */
static void decode_data(struct sixpack *sp, u8 inbyte)
{
u8 *buf;
if (sp->rx_count != 3) {
sp->raw_buf[sp->rx_count++] = inbyte;
return;
}
if (sp->rx_count_cooked + 2 >= sizeof(sp->cooked_buf)) {
pr_err("6pack: cooked buffer overrun, data loss\n");
sp->rx_count = 0;
return;
}
buf = sp->raw_buf;
sp->cooked_buf[sp->rx_count_cooked++] =
buf[0] | ((buf[1] << 2) & 0xc0);
sp->cooked_buf[sp->rx_count_cooked++] =
(buf[1] & 0x0f) | ((buf[2] << 2) & 0xf0);
sp->cooked_buf[sp->rx_count_cooked++] =
(buf[2] & 0x03) | (inbyte << 2);
sp->rx_count = 0;
}
/* identify and execute a 6pack priority command byte */
static void decode_prio_command(struct sixpack *sp, u8 cmd)
{
ssize_t actual;
if ((cmd & SIXP_PRIO_DATA_MASK) != 0) { /* idle ? */
/* RX and DCD flags can only be set in the same prio command,
if the DCD flag has been set without the RX flag in the previous
prio command. If DCD has not been set before, something in the
transmission has gone wrong. In this case, RX and DCD are
cleared in order to prevent the decode_data routine from
reading further data that might be corrupt. */
if (((sp->status & SIXP_DCD_MASK) == 0) &&
((cmd & SIXP_RX_DCD_MASK) == SIXP_RX_DCD_MASK)) {
if (sp->status != 1)
printk(KERN_DEBUG "6pack: protocol violation\n");
else
sp->status = 0;
cmd &= ~SIXP_RX_DCD_MASK;
}
sp->status = cmd & SIXP_PRIO_DATA_MASK;
} else { /* output watchdog char if idle */
if ((sp->status2 != 0) && (sp->duplex == 1)) {
sp->led_state = 0x70;
sp->tty->ops->write(sp->tty, &sp->led_state, 1);
sp->tx_enable = 1;
actual = sp->tty->ops->write(sp->tty, sp->xbuff, sp->status2);
sp->xleft -= actual;
sp->xhead += actual;
sp->led_state = 0x60;
sp->status2 = 0;
}
}
/* needed to trigger the TNC watchdog */
sp->tty->ops->write(sp->tty, &sp->led_state, 1);
/* if the state byte has been received, the TNC is present,
so the resync timer can be reset. */
if (sp->tnc_state == TNC_IN_SYNC)
mod_timer(&sp->resync_t, jiffies + SIXP_INIT_RESYNC_TIMEOUT);
sp->status1 = cmd & SIXP_PRIO_DATA_MASK;
}
/* identify and execute a standard 6pack command byte */
static void decode_std_command(struct sixpack *sp, u8 cmd)
{
u8 checksum = 0, rest = 0;
short i;
switch (cmd & SIXP_CMD_MASK) { /* normal command */
case SIXP_SEOF:
if ((sp->rx_count == 0) && (sp->rx_count_cooked == 0)) {
if ((sp->status & SIXP_RX_DCD_MASK) ==
SIXP_RX_DCD_MASK) {
sp->led_state = 0x68;
sp->tty->ops->write(sp->tty, &sp->led_state, 1);
}
} else {
sp->led_state = 0x60;
/* fill trailing bytes with zeroes */
sp->tty->ops->write(sp->tty, &sp->led_state, 1);
spin_lock_bh(&sp->rxlock);
rest = sp->rx_count;
if (rest != 0)
for (i = rest; i <= 3; i++)
decode_data(sp, 0);
if (rest == 2)
sp->rx_count_cooked -= 2;
else if (rest == 3)
sp->rx_count_cooked -= 1;
for (i = 0; i < sp->rx_count_cooked; i++)
checksum += sp->cooked_buf[i];
if (checksum != SIXP_CHKSUM) {
printk(KERN_DEBUG "6pack: bad checksum %2.2x\n", checksum);
} else {
sp->rcount = sp->rx_count_cooked-2;
sp_bump(sp, 0);
}
sp->rx_count_cooked = 0;
spin_unlock_bh(&sp->rxlock);
}
break;
case SIXP_TX_URUN: printk(KERN_DEBUG "6pack: TX underrun\n");
break;
case SIXP_RX_ORUN: printk(KERN_DEBUG "6pack: RX overrun\n");
break;
case SIXP_RX_BUF_OVL:
printk(KERN_DEBUG "6pack: RX buffer overflow\n");
}
}
/* decode a 6pack packet */
static void
sixpack_decode(struct sixpack *sp, const u8 *pre_rbuff, size_t count)
{
size_t count1;
u8 inbyte;
for (count1 = 0; count1 < count; count1++) {
inbyte = pre_rbuff[count1];
if (inbyte == SIXP_FOUND_TNC) {
tnc_set_sync_state(sp, TNC_IN_SYNC);
timer_delete(&sp->resync_t);
}
if ((inbyte & SIXP_PRIO_CMD_MASK) != 0)
decode_prio_command(sp, inbyte);
else if ((inbyte & SIXP_STD_CMD_MASK) != 0)
decode_std_command(sp, inbyte);
else if ((sp->status & SIXP_RX_DCD_MASK) == SIXP_RX_DCD_MASK) {
spin_lock_bh(&sp->rxlock);
decode_data(sp, inbyte);
spin_unlock_bh(&sp->rxlock);
}
}
}
MODULE_AUTHOR("Ralf Baechle DO1GRB <ralf@linux-mips.org>");
MODULE_DESCRIPTION("6pack driver for AX.25");
MODULE_LICENSE("GPL");
MODULE_ALIAS_LDISC(N_6PACK);
module_init(sixpack_init_driver);
module_exit(sixpack_exit_driver);

162
drivers/net/hamradio/Kconfig
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@ -1,162 +0,0 @@
# SPDX-License-Identifier: GPL-2.0-only
config MKISS
tristate "Serial port KISS driver"
depends on AX25 && TTY
select CRC16
help
KISS is a protocol used for the exchange of data between a computer
and a Terminal Node Controller (a small embedded system commonly
used for networking over AX.25 amateur radio connections; it
connects the computer's serial port with the radio's microphone
input and speaker output).
Although KISS is less advanced than the 6pack protocol, it has
the advantage that it is already supported by most modern TNCs
without the need for a firmware upgrade.
To compile this driver as a module, choose M here: the module
will be called mkiss.
config 6PACK
tristate "Serial port 6PACK driver"
depends on AX25 && TTY
help
6pack is a transmission protocol for the data exchange between your
PC and your TNC (the Terminal Node Controller acts as a kind of
modem connecting your computer's serial port to your radio's
microphone input and speaker output). This protocol can be used as
an alternative to KISS for networking over AX.25 amateur radio
connections, but it has some extended functionality.
Note that this driver is still experimental and might cause
problems. For details about the features and the usage of the
driver, read <file:Documentation/networking/6pack.rst>.
To compile this driver as a module, choose M here: the module
will be called 6pack.
config BPQETHER
tristate "BPQ Ethernet driver"
depends on AX25
help
AX.25 is the protocol used for computer communication over amateur
radio. If you say Y here, you will be able to send and receive AX.25
traffic over Ethernet (also called "BPQ AX.25"), which could be
useful if some other computer on your local network has a direct
amateur radio connection.
config SCC
tristate "Z8530 SCC driver"
depends on ISA && AX25
help
These cards are used to connect your Linux box to an amateur radio
in order to communicate with other computers. If you want to use
this, read
<file:Documentation/networking/device_drivers/hamradio/z8530drv.rst>
and the AX25-HOWTO, available from
<http://www.tldp.org/docs.html#howto>. Also make sure to say Y
to "Amateur Radio AX.25 Level 2" support.
To compile this driver as a module, choose M here: the module
will be called scc.
config SCC_DELAY
bool "additional delay for PA0HZP OptoSCC compatible boards"
depends on SCC
help
Say Y here if you experience problems with the SCC driver not
working properly; please read
<file:Documentation/networking/device_drivers/hamradio/z8530drv.rst>
for details.
If unsure, say N.
config SCC_TRXECHO
bool "support for TRX that feedback the tx signal to rx"
depends on SCC
help
Some transmitters feed the transmitted signal back to the receive
line. Say Y here to foil this by explicitly disabling the receiver
during data transmission.
If in doubt, say Y.
config BAYCOM_SER_FDX
tristate "BAYCOM ser12 fullduplex driver for AX.25"
depends on AX25 && HAS_IOPORT
select CRC_CCITT
help
This is one of two drivers for Baycom style simple amateur radio
modems that connect to a serial interface. The driver supports the
ser12 design in full-duplex mode. In addition, it allows the
baudrate to be set between 300 and 4800 baud (however not all modems
support all baudrates). This is the preferred driver. The next
driver, "BAYCOM ser12 half-duplex driver for AX.25" is the old
driver and still provided in case this driver does not work with
your serial interface chip. To configure the driver, use the sethdlc
utility available in the standard ax25 utilities package.
For more information on the modems, see
<file:Documentation/networking/device_drivers/hamradio/baycom.rst>.
To compile this driver as a module, choose M here: the module
will be called baycom_ser_fdx. This is recommended.
config BAYCOM_SER_HDX
tristate "BAYCOM ser12 halfduplex driver for AX.25"
depends on AX25 && HAS_IOPORT
select CRC_CCITT
help
This is one of two drivers for Baycom style simple amateur radio
modems that connect to a serial interface. The driver supports the
ser12 design in half-duplex mode. This is the old driver. It is
still provided in case your serial interface chip does not work with
the full-duplex driver. This driver is deprecated. To configure
the driver, use the sethdlc utility available in the standard ax25
utilities package. For more information on the modems, see
<file:Documentation/networking/device_drivers/hamradio/baycom.rst>.
To compile this driver as a module, choose M here: the module
will be called baycom_ser_hdx. This is recommended.
config BAYCOM_PAR
tristate "BAYCOM picpar and par96 driver for AX.25"
depends on PARPORT && AX25
select CRC_CCITT
help
This is a driver for Baycom style simple amateur radio modems that
connect to a parallel interface. The driver supports the picpar and
par96 designs. To configure the driver, use the sethdlc utility
available in the standard ax25 utilities package.
For more information on the modems, see
<file:Documentation/networking/device_drivers/hamradio/baycom.rst>.
To compile this driver as a module, choose M here: the module
will be called baycom_par. This is recommended.
config BAYCOM_EPP
tristate "BAYCOM epp driver for AX.25"
depends on PARPORT && AX25 && !64BIT
select CRC_CCITT
help
This is a driver for Baycom style simple amateur radio modems that
connect to a parallel interface. The driver supports the EPP
designs. To configure the driver, use the sethdlc utility available
in the standard ax25 utilities package.
For more information on the modems, see
<file:Documentation/networking/device_drivers/hamradio/baycom.rst>.
To compile this driver as a module, choose M here: the module
will be called baycom_epp. This is recommended.
config YAM
tristate "YAM driver for AX.25"
depends on AX25 && HAS_IOPORT
help
The YAM is a modem for packet radio which connects to the serial
port and includes some of the functions of a Terminal Node
Controller. If you have one of those, say Y here.
To compile this driver as a module, choose M here: the module
will be called yam.

22
drivers/net/hamradio/Makefile
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@ -1,22 +0,0 @@
# SPDX-License-Identifier: GPL-2.0
#
# Makefile for the Linux AX.25 and HFMODEM device drivers.
#
#
# 19971130 Moved the amateur radio related network drivers from
# drivers/net/ to drivers/hamradio for easier maintenance.
# Joerg Reuter DL1BKE <jreuter@yaina.de>
#
# 20000806 Rewritten to use lists instead of if-statements.
# Christoph Hellwig <hch@infradead.org>
#
obj-$(CONFIG_SCC) += scc.o
obj-$(CONFIG_MKISS) += mkiss.o
obj-$(CONFIG_6PACK) += 6pack.o
obj-$(CONFIG_YAM) += yam.o
obj-$(CONFIG_BPQETHER) += bpqether.o
obj-$(CONFIG_BAYCOM_SER_FDX) += baycom_ser_fdx.o hdlcdrv.o
obj-$(CONFIG_BAYCOM_SER_HDX) += baycom_ser_hdx.o hdlcdrv.o
obj-$(CONFIG_BAYCOM_PAR) += baycom_par.o hdlcdrv.o
obj-$(CONFIG_BAYCOM_EPP) += baycom_epp.o hdlcdrv.o

1316
drivers/net/hamradio/baycom_epp.c
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File diff suppressed because it is too large Load Diff

598
drivers/net/hamradio/baycom_par.c
View File

@ -1,598 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*****************************************************************************/
/*
* baycom_par.c -- baycom par96 and picpar radio modem driver.
*
* Copyright (C) 1996-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
*
* Please note that the GPL allows you to use the driver, NOT the radio.
* In order to use the radio, you need a license from the communications
* authority of your country.
*
* Supported modems
*
* par96: This is a modem for 9600 baud FSK compatible to the G3RUH standard.
* The modem does all the filtering and regenerates the receiver clock.
* Data is transferred from and to the PC via a shift register.
* The shift register is filled with 16 bits and an interrupt is
* signalled. The PC then empties the shift register in a burst. This
* modem connects to the parallel port, hence the name. The modem
* leaves the implementation of the HDLC protocol and the scrambler
* polynomial to the PC. This modem is no longer available (at least
* from Baycom) and has been replaced by the PICPAR modem (see below).
* You may however still build one from the schematics published in
* cq-DL :-).
*
* picpar: This is a redesign of the par96 modem by Henning Rech, DF9IC. The
* modem is protocol compatible to par96, but uses only three low
* power ICs and can therefore be fed from the parallel port and
* does not require an additional power supply. It features
* built in DCD circuitry. The driver should therefore be configured
* for hardware DCD.
*
* Command line options (insmod command line)
*
* mode driver mode string. Valid choices are par96 and picpar.
* iobase base address of the port; common values are 0x378, 0x278, 0x3bc
*
* History:
* 0.1 26.06.1996 Adapted from baycom.c and made network driver interface
* 18.10.1996 Changed to new user space access routines (copy_{to,from}_user)
* 0.3 26.04.1997 init code/data tagged
* 0.4 08.07.1997 alternative ser12 decoding algorithm (uses delta CTS ints)
* 0.5 11.11.1997 split into separate files for ser12/par96
* 0.6 03.08.1999 adapt to Linus' new __setup/__initcall
* removed some pre-2.2 kernel compatibility cruft
* 0.7 10.08.1999 Check if parport can do SPP and is safe to access during interrupt contexts
* 0.8 12.02.2000 adapted to softnet driver interface
* removed direct parport access, uses parport driver methods
* 0.9 03.07.2000 fix interface name handling
*/
/*****************************************************************************/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/hdlcdrv.h>
#include <linux/baycom.h>
#include <linux/parport.h>
#include <linux/bitops.h>
#include <linux/jiffies.h>
#include <linux/uaccess.h>
/* --------------------------------------------------------------------- */
#define BAYCOM_DEBUG
/*
* modem options; bit mask
*/
#define BAYCOM_OPTIONS_SOFTDCD 1
/* --------------------------------------------------------------------- */
static const char bc_drvname[] = "baycom_par";
static const char bc_drvinfo[] = KERN_INFO "baycom_par: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA\n"
"baycom_par: version 0.9\n";
/* --------------------------------------------------------------------- */
#define NR_PORTS 4
static struct net_device *baycom_device[NR_PORTS];
/* --------------------------------------------------------------------- */
#define PAR96_BURSTBITS 16
#define PAR96_BURST 4
#define PAR96_PTT 2
#define PAR96_TXBIT 1
#define PAR96_ACK 0x40
#define PAR96_RXBIT 0x20
#define PAR96_DCD 0x10
#define PAR97_POWER 0xf8
/* ---------------------------------------------------------------------- */
/*
* Information that need to be kept for each board.
*/
struct baycom_state {
struct hdlcdrv_state hdrv;
struct pardevice *pdev;
unsigned int options;
struct modem_state {
short arb_divider;
unsigned char flags;
unsigned int shreg;
struct modem_state_par96 {
int dcd_count;
unsigned int dcd_shreg;
unsigned long descram;
unsigned long scram;
} par96;
} modem;
#ifdef BAYCOM_DEBUG
struct debug_vals {
unsigned long last_jiffies;
unsigned cur_intcnt;
unsigned last_intcnt;
int cur_pllcorr;
int last_pllcorr;
} debug_vals;
#endif /* BAYCOM_DEBUG */
};
/* --------------------------------------------------------------------- */
static inline void baycom_int_freq(struct baycom_state *bc)
{
#ifdef BAYCOM_DEBUG
unsigned long cur_jiffies = jiffies;
/*
* measure the interrupt frequency
*/
bc->debug_vals.cur_intcnt++;
if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) {
bc->debug_vals.last_jiffies = cur_jiffies;
bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt;
bc->debug_vals.cur_intcnt = 0;
bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr;
bc->debug_vals.cur_pllcorr = 0;
}
#endif /* BAYCOM_DEBUG */
}
/* --------------------------------------------------------------------- */
/*
* ===================== PAR96 specific routines =========================
*/
#define PAR96_DESCRAM_TAP1 0x20000
#define PAR96_DESCRAM_TAP2 0x01000
#define PAR96_DESCRAM_TAP3 0x00001
#define PAR96_DESCRAM_TAPSH1 17
#define PAR96_DESCRAM_TAPSH2 12
#define PAR96_DESCRAM_TAPSH3 0
#define PAR96_SCRAM_TAP1 0x20000 /* X^17 */
#define PAR96_SCRAM_TAPN 0x00021 /* X^0+X^5 */
/* --------------------------------------------------------------------- */
static inline void par96_tx(struct net_device *dev, struct baycom_state *bc)
{
int i;
unsigned int data = hdlcdrv_getbits(&bc->hdrv);
struct parport *pp = bc->pdev->port;
for(i = 0; i < PAR96_BURSTBITS; i++, data >>= 1) {
unsigned char val = PAR97_POWER;
bc->modem.par96.scram = ((bc->modem.par96.scram << 1) |
(bc->modem.par96.scram & 1));
if (!(data & 1))
bc->modem.par96.scram ^= 1;
if (bc->modem.par96.scram & (PAR96_SCRAM_TAP1 << 1))
bc->modem.par96.scram ^=
(PAR96_SCRAM_TAPN << 1);
if (bc->modem.par96.scram & (PAR96_SCRAM_TAP1 << 2))
val |= PAR96_TXBIT;
pp->ops->write_data(pp, val);
pp->ops->write_data(pp, val | PAR96_BURST);
}
}
/* --------------------------------------------------------------------- */
static inline void par96_rx(struct net_device *dev, struct baycom_state *bc)
{
int i;
unsigned int data, mask, mask2, descx;
struct parport *pp = bc->pdev->port;
/*
* do receiver; differential decode and descramble on the fly
*/
for(data = i = 0; i < PAR96_BURSTBITS; i++) {
bc->modem.par96.descram = (bc->modem.par96.descram << 1);
if (pp->ops->read_status(pp) & PAR96_RXBIT)
bc->modem.par96.descram |= 1;
descx = bc->modem.par96.descram ^
(bc->modem.par96.descram >> 1);
/* now the diff decoded data is inverted in descram */
pp->ops->write_data(pp, PAR97_POWER | PAR96_PTT);
descx ^= ((descx >> PAR96_DESCRAM_TAPSH1) ^
(descx >> PAR96_DESCRAM_TAPSH2));
data >>= 1;
if (!(descx & 1))
data |= 0x8000;
pp->ops->write_data(pp, PAR97_POWER | PAR96_PTT | PAR96_BURST);
}
hdlcdrv_putbits(&bc->hdrv, data);
/*
* do DCD algorithm
*/
if (bc->options & BAYCOM_OPTIONS_SOFTDCD) {
bc->modem.par96.dcd_shreg = (bc->modem.par96.dcd_shreg >> 16)
| (data << 16);
/* search for flags and set the dcd counter appropriately */
for(mask = 0x1fe00, mask2 = 0xfc00, i = 0;
i < PAR96_BURSTBITS; i++, mask <<= 1, mask2 <<= 1)
if ((bc->modem.par96.dcd_shreg & mask) == mask2)
bc->modem.par96.dcd_count = HDLCDRV_MAXFLEN+4;
/* check for abort/noise sequences */
for(mask = 0x1fe00, mask2 = 0x1fe00, i = 0;
i < PAR96_BURSTBITS; i++, mask <<= 1, mask2 <<= 1)
if (((bc->modem.par96.dcd_shreg & mask) == mask2) &&
(bc->modem.par96.dcd_count >= 0))
bc->modem.par96.dcd_count -= HDLCDRV_MAXFLEN-10;
/* decrement and set the dcd variable */
if (bc->modem.par96.dcd_count >= 0)
bc->modem.par96.dcd_count -= 2;
hdlcdrv_setdcd(&bc->hdrv, bc->modem.par96.dcd_count > 0);
} else {
hdlcdrv_setdcd(&bc->hdrv, !!(pp->ops->read_status(pp) & PAR96_DCD));
}
}
/* --------------------------------------------------------------------- */
static void par96_interrupt(void *dev_id)
{
struct net_device *dev = dev_id;
struct baycom_state *bc = netdev_priv(dev);
baycom_int_freq(bc);
/*
* check if transmitter active
*/
if (hdlcdrv_ptt(&bc->hdrv))
par96_tx(dev, bc);
else {
par96_rx(dev, bc);
if (--bc->modem.arb_divider <= 0) {
bc->modem.arb_divider = 6;
local_irq_enable();
hdlcdrv_arbitrate(dev, &bc->hdrv);
}
}
local_irq_enable();
hdlcdrv_transmitter(dev, &bc->hdrv);
hdlcdrv_receiver(dev, &bc->hdrv);
local_irq_disable();
}
/* --------------------------------------------------------------------- */
static void par96_wakeup(void *handle)
{
struct net_device *dev = (struct net_device *)handle;
struct baycom_state *bc = netdev_priv(dev);
printk(KERN_DEBUG "baycom_par: %s: why am I being woken up?\n", dev->name);
if (!parport_claim(bc->pdev))
printk(KERN_DEBUG "baycom_par: %s: I'm broken.\n", dev->name);
}
/* --------------------------------------------------------------------- */
static int par96_open(struct net_device *dev)
{
struct baycom_state *bc = netdev_priv(dev);
struct pardev_cb par_cb;
struct parport *pp;
int i;
if (!dev || !bc)
return -ENXIO;
pp = parport_find_base(dev->base_addr);
if (!pp) {
printk(KERN_ERR "baycom_par: parport at 0x%lx unknown\n", dev->base_addr);
return -ENXIO;
}
if (pp->irq < 0) {
printk(KERN_ERR "baycom_par: parport at 0x%lx has no irq\n", pp->base);
parport_put_port(pp);
return -ENXIO;
}
if ((~pp->modes) & (PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT)) {
printk(KERN_ERR "baycom_par: parport at 0x%lx cannot be used\n", pp->base);
parport_put_port(pp);
return -ENXIO;
}
memset(&bc->modem, 0, sizeof(bc->modem));
bc->hdrv.par.bitrate = 9600;
memset(&par_cb, 0, sizeof(par_cb));
par_cb.wakeup = par96_wakeup;
par_cb.irq_func = par96_interrupt;
par_cb.private = (void *)dev;
par_cb.flags = PARPORT_DEV_EXCL;
for (i = 0; i < NR_PORTS; i++)
if (baycom_device[i] == dev)
break;
if (i == NR_PORTS) {
pr_err("%s: no device found\n", bc_drvname);
parport_put_port(pp);
return -ENODEV;
}
bc->pdev = parport_register_dev_model(pp, dev->name, &par_cb, i);
parport_put_port(pp);
if (!bc->pdev) {
printk(KERN_ERR "baycom_par: cannot register parport at 0x%lx\n", dev->base_addr);
return -ENXIO;
}
if (parport_claim(bc->pdev)) {
printk(KERN_ERR "baycom_par: parport at 0x%lx busy\n", pp->base);
parport_unregister_device(bc->pdev);
return -EBUSY;
}
pp = bc->pdev->port;
dev->irq = pp->irq;
pp->ops->data_forward(pp);
bc->hdrv.par.bitrate = 9600;
pp->ops->write_data(pp, PAR96_PTT | PAR97_POWER); /* switch off PTT */
pp->ops->enable_irq(pp);
printk(KERN_INFO "%s: par96 at iobase 0x%lx irq %u options 0x%x\n",
bc_drvname, dev->base_addr, dev->irq, bc->options);
return 0;
}
/* --------------------------------------------------------------------- */
static int par96_close(struct net_device *dev)
{
struct baycom_state *bc = netdev_priv(dev);
struct parport *pp;
if (!dev || !bc)
return -EINVAL;
pp = bc->pdev->port;
/* disable interrupt */
pp->ops->disable_irq(pp);
/* switch off PTT */
pp->ops->write_data(pp, PAR96_PTT | PAR97_POWER);
parport_release(bc->pdev);
parport_unregister_device(bc->pdev);
printk(KERN_INFO "%s: close par96 at iobase 0x%lx irq %u\n",
bc_drvname, dev->base_addr, dev->irq);
return 0;
}
/* --------------------------------------------------------------------- */
/*
* ===================== hdlcdrv driver interface =========================
*/
static int baycom_ioctl(struct net_device *dev, void __user *data,
struct hdlcdrv_ioctl *hi, int cmd);
/* --------------------------------------------------------------------- */
static const struct hdlcdrv_ops par96_ops = {
.drvname = bc_drvname,
.drvinfo = bc_drvinfo,
.open = par96_open,
.close = par96_close,
.ioctl = baycom_ioctl
};
/* --------------------------------------------------------------------- */
static int baycom_setmode(struct baycom_state *bc, const char *modestr)
{
if (!strncmp(modestr, "picpar", 6))
bc->options = 0;
else if (!strncmp(modestr, "par96", 5))
bc->options = BAYCOM_OPTIONS_SOFTDCD;
else
bc->options = !!strchr(modestr, '*');
return 0;
}
/* --------------------------------------------------------------------- */
static int baycom_ioctl(struct net_device *dev, void __user *data,
struct hdlcdrv_ioctl *hi, int cmd)
{
struct baycom_state *bc;
struct baycom_ioctl bi;
if (!dev)
return -EINVAL;
bc = netdev_priv(dev);
BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC);
if (cmd != SIOCDEVPRIVATE)
return -ENOIOCTLCMD;
switch (hi->cmd) {
default:
break;
case HDLCDRVCTL_GETMODE:
strscpy(hi->data.modename, bc->options ? "par96" : "picpar");
if (copy_to_user(data, hi, sizeof(struct hdlcdrv_ioctl)))
return -EFAULT;
return 0;
case HDLCDRVCTL_SETMODE:
if (netif_running(dev) || !capable(CAP_NET_ADMIN))
return -EACCES;
hi->data.modename[sizeof(hi->data.modename)-1] = '\0';
return baycom_setmode(bc, hi->data.modename);
case HDLCDRVCTL_MODELIST:
strscpy(hi->data.modename, "par96,picpar");
if (copy_to_user(data, hi, sizeof(struct hdlcdrv_ioctl)))
return -EFAULT;
return 0;
case HDLCDRVCTL_MODEMPARMASK:
return HDLCDRV_PARMASK_IOBASE;
}
if (copy_from_user(&bi, data, sizeof(bi)))
return -EFAULT;
switch (bi.cmd) {
default:
return -ENOIOCTLCMD;
#ifdef BAYCOM_DEBUG
case BAYCOMCTL_GETDEBUG:
bi.data.dbg.debug1 = bc->hdrv.ptt_keyed;
bi.data.dbg.debug2 = bc->debug_vals.last_intcnt;
bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr;
break;
#endif /* BAYCOM_DEBUG */
}
if (copy_to_user(data, &bi, sizeof(bi)))
return -EFAULT;
return 0;
}
/* --------------------------------------------------------------------- */
/*
* command line settable parameters
*/
static char *mode[NR_PORTS] = { "picpar", };
static int iobase[NR_PORTS] = { 0x378, };
module_param_array(mode, charp, NULL, 0);
MODULE_PARM_DESC(mode, "baycom operating mode; eg. par96 or picpar");
module_param_hw_array(iobase, int, ioport, NULL, 0);
MODULE_PARM_DESC(iobase, "baycom io base address");
MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
MODULE_DESCRIPTION("Baycom par96 and picpar amateur radio modem driver");
MODULE_LICENSE("GPL");
/* --------------------------------------------------------------------- */
static int baycom_par_probe(struct pardevice *par_dev)
{
struct device_driver *drv = par_dev->dev.driver;
int len = strlen(drv->name);
if (strncmp(par_dev->name, drv->name, len))
return -ENODEV;
return 0;
}
static struct parport_driver baycom_par_driver = {
.name = "bcp",
.probe = baycom_par_probe,
};
static int __init init_baycompar(void)
{
int i, found = 0, ret;
char set_hw = 1;
printk(bc_drvinfo);
ret = parport_register_driver(&baycom_par_driver);
if (ret)
return ret;
/*
* register net devices
*/
for (i = 0; i < NR_PORTS; i++) {
struct net_device *dev;
struct baycom_state *bc;
char ifname[IFNAMSIZ];
sprintf(ifname, "bcp%d", i);
if (!mode[i])
set_hw = 0;
if (!set_hw)
iobase[i] = 0;
dev = hdlcdrv_register(&par96_ops,
sizeof(struct baycom_state),
ifname, iobase[i], 0, 0);
if (IS_ERR(dev))
break;
bc = netdev_priv(dev);
if (set_hw && baycom_setmode(bc, mode[i]))
set_hw = 0;
found++;
baycom_device[i] = dev;
}
if (!found) {
parport_unregister_driver(&baycom_par_driver);
return -ENXIO;
}
return 0;
}
static void __exit cleanup_baycompar(void)
{
int i;
for(i = 0; i < NR_PORTS; i++) {
struct net_device *dev = baycom_device[i];
if (dev)
hdlcdrv_unregister(dev);
}
parport_unregister_driver(&baycom_par_driver);
}
module_init(init_baycompar);
module_exit(cleanup_baycompar);
/* --------------------------------------------------------------------- */
#ifndef MODULE
/*
* format: baycom_par=io,mode
* mode: par96,picpar
*/
static int __init baycom_par_setup(char *str)
{
static unsigned nr_dev;
int ints[2];
if (nr_dev >= NR_PORTS)
return 0;
str = get_options(str, 2, ints);
if (ints[0] < 1)
return 0;
mode[nr_dev] = str;
iobase[nr_dev] = ints[1];
nr_dev++;
return 1;
}
__setup("baycom_par=", baycom_par_setup);
#endif /* MODULE */
/* --------------------------------------------------------------------- */

678
drivers/net/hamradio/baycom_ser_fdx.c
View File

@ -1,678 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*****************************************************************************/
/*
* baycom_ser_fdx.c -- baycom ser12 fullduplex radio modem driver.
*
* Copyright (C) 1996-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
*
* Please note that the GPL allows you to use the driver, NOT the radio.
* In order to use the radio, you need a license from the communications
* authority of your country.
*
* Supported modems
*
* ser12: This is a very simple 1200 baud AFSK modem. The modem consists only
* of a modulator/demodulator chip, usually a TI TCM3105. The computer
* is responsible for regenerating the receiver bit clock, as well as
* for handling the HDLC protocol. The modem connects to a serial port,
* hence the name. Since the serial port is not used as an async serial
* port, the kernel driver for serial ports cannot be used, and this
* driver only supports standard serial hardware (8250, 16450, 16550A)
*
* This modem usually draws its supply current out of the otherwise unused
* TXD pin of the serial port. Thus a contiguous stream of 0x00-bytes
* is transmitted to achieve a positive supply voltage.
*
* hsk: This is a 4800 baud FSK modem, designed for TNC use. It works fine
* in 'baycom-mode' :-) In contrast to the TCM3105 modem, power is
* externally supplied. So there's no need to provide the 0x00-byte-stream
* when receiving or idle, which drastically reduces interrupt load.
*
* Command line options (insmod command line)
*
* mode ser# hardware DCD
* ser#* software DCD
* ser#+ hardware DCD, inverted signal at DCD pin
* '#' denotes the baud rate / 100, eg. ser12* is '1200 baud, soft DCD'
* iobase base address of the port; common values are 0x3f8, 0x2f8, 0x3e8, 0x2e8
* baud baud rate (between 300 and 4800)
* irq interrupt line of the port; common values are 4,3
*
* History:
* 0.1 26.06.1996 Adapted from baycom.c and made network driver interface
* 18.10.1996 Changed to new user space access routines (copy_{to,from}_user)
* 0.3 26.04.1997 init code/data tagged
* 0.4 08.07.1997 alternative ser12 decoding algorithm (uses delta CTS ints)
* 0.5 11.11.1997 ser12/par96 split into separate files
* 0.6 24.01.1998 Thorsten Kranzkowski, dl8bcu and Thomas Sailer:
* reduced interrupt load in transmit case
* reworked receiver
* 0.7 03.08.1999 adapt to Linus' new __setup/__initcall
* 0.8 10.08.1999 use module_init/module_exit
* 0.9 12.02.2000 adapted to softnet driver interface
* 0.10 03.07.2000 fix interface name handling
*/
/*****************************************************************************/
#include <linux/capability.h>
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/hdlcdrv.h>
#include <linux/baycom.h>
#include <linux/jiffies.h>
#include <linux/time64.h>
#include <linux/uaccess.h>
#include <asm/io.h>
#include <asm/irq.h>
/* --------------------------------------------------------------------- */
#define BAYCOM_DEBUG
/* --------------------------------------------------------------------- */
static const char bc_drvname[] = "baycom_ser_fdx";
static const char bc_drvinfo[] = KERN_INFO "baycom_ser_fdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA\n"
"baycom_ser_fdx: version 0.10\n";
/* --------------------------------------------------------------------- */
#define NR_PORTS 4
static struct net_device *baycom_device[NR_PORTS];
/* --------------------------------------------------------------------- */
#define RBR(iobase) (iobase+0)
#define THR(iobase) (iobase+0)
#define IER(iobase) (iobase+1)
#define IIR(iobase) (iobase+2)
#define FCR(iobase) (iobase+2)
#define LCR(iobase) (iobase+3)
#define MCR(iobase) (iobase+4)
#define LSR(iobase) (iobase+5)
#define MSR(iobase) (iobase+6)
#define SCR(iobase) (iobase+7)
#define DLL(iobase) (iobase+0)
#define DLM(iobase) (iobase+1)
#define SER12_EXTENT 8
/* ---------------------------------------------------------------------- */
/*
* Information that need to be kept for each board.
*/
struct baycom_state {
struct hdlcdrv_state hdrv;
unsigned int baud, baud_us, baud_arbdiv, baud_uartdiv, baud_dcdtimeout;
int opt_dcd;
struct modem_state {
unsigned char flags;
unsigned char ptt;
unsigned int shreg;
struct modem_state_ser12 {
unsigned char tx_bit;
unsigned char last_rxbit;
int dcd_sum0, dcd_sum1, dcd_sum2;
int dcd_time;
unsigned int pll_time;
unsigned int txshreg;
} ser12;
} modem;
#ifdef BAYCOM_DEBUG
struct debug_vals {
unsigned long last_jiffies;
unsigned cur_intcnt;
unsigned last_intcnt;
int cur_pllcorr;
int last_pllcorr;
} debug_vals;
#endif /* BAYCOM_DEBUG */
};
/* --------------------------------------------------------------------- */
static inline void baycom_int_freq(struct baycom_state *bc)
{
#ifdef BAYCOM_DEBUG
unsigned long cur_jiffies = jiffies;
/*
* measure the interrupt frequency
*/
bc->debug_vals.cur_intcnt++;
if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) {
bc->debug_vals.last_jiffies = cur_jiffies;
bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt;
bc->debug_vals.cur_intcnt = 0;
bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr;
bc->debug_vals.cur_pllcorr = 0;
}
#endif /* BAYCOM_DEBUG */
}
/* --------------------------------------------------------------------- */
/*
* ===================== SER12 specific routines =========================
*/
/* --------------------------------------------------------------------- */
static inline void ser12_set_divisor(struct net_device *dev,
unsigned int divisor)
{
outb(0x81, LCR(dev->base_addr)); /* DLAB = 1 */
outb(divisor, DLL(dev->base_addr));
outb(divisor >> 8, DLM(dev->base_addr));
outb(0x01, LCR(dev->base_addr)); /* word length = 6 */
/*
* make sure the next interrupt is generated;
* 0 must be used to power the modem; the modem draws its
* power from the TxD line
*/
outb(0x00, THR(dev->base_addr));
/*
* it is important not to set the divider while transmitting;
* this reportedly makes some UARTs generating interrupts
* in the hundredthousands per second region
* Reported by: Ignacio.Arenaza@studi.epfl.ch (Ignacio Arenaza Nuno)
*/
}
static __inline__ void ser12_rx(struct net_device *dev, struct baycom_state *bc, struct timespec64 *ts, unsigned char curs)
{
int timediff;
int bdus8 = bc->baud_us >> 3;
int bdus4 = bc->baud_us >> 2;
int bdus2 = bc->baud_us >> 1;
timediff = 1000000 + ts->tv_nsec / NSEC_PER_USEC -
bc->modem.ser12.pll_time;
while (timediff >= 500000)
timediff -= 1000000;
while (timediff >= bdus2) {
timediff -= bc->baud_us;
bc->modem.ser12.pll_time += bc->baud_us;
bc->modem.ser12.dcd_time--;
/* first check if there is room to add a bit */
if (bc->modem.shreg & 1) {
hdlcdrv_putbits(&bc->hdrv, (bc->modem.shreg >> 1) ^ 0xffff);
bc->modem.shreg = 0x10000;
}
/* add a one bit */
bc->modem.shreg >>= 1;
}
if (bc->modem.ser12.dcd_time <= 0) {
if (!bc->opt_dcd)
hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 +
bc->modem.ser12.dcd_sum1 +
bc->modem.ser12.dcd_sum2) < 0);
bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1;
bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0;
bc->modem.ser12.dcd_sum0 = 2; /* slight bias */
bc->modem.ser12.dcd_time += 120;
}
if (bc->modem.ser12.last_rxbit != curs) {
bc->modem.ser12.last_rxbit = curs;
bc->modem.shreg |= 0x10000;
/* adjust the PLL */
if (timediff > 0)
bc->modem.ser12.pll_time += bdus8;
else
bc->modem.ser12.pll_time += 1000000 - bdus8;
/* update DCD */
if (abs(timediff) > bdus4)
bc->modem.ser12.dcd_sum0 += 4;
else
bc->modem.ser12.dcd_sum0--;
#ifdef BAYCOM_DEBUG
bc->debug_vals.cur_pllcorr = timediff;
#endif /* BAYCOM_DEBUG */
}
while (bc->modem.ser12.pll_time >= 1000000)
bc->modem.ser12.pll_time -= 1000000;
}
/* --------------------------------------------------------------------- */
static irqreturn_t ser12_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *)dev_id;
struct baycom_state *bc = netdev_priv(dev);
struct timespec64 ts;
unsigned char iir, msr;
unsigned int txcount = 0;
if (!bc || bc->hdrv.magic != HDLCDRV_MAGIC)
return IRQ_NONE;
/* fast way out for shared irq */
if ((iir = inb(IIR(dev->base_addr))) & 1)
return IRQ_NONE;
/* get current time */
ktime_get_ts64(&ts);
msr = inb(MSR(dev->base_addr));
/* delta DCD */
if ((msr & 8) && bc->opt_dcd)
hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80));
do {
switch (iir & 6) {
case 6:
inb(LSR(dev->base_addr));
break;
case 4:
inb(RBR(dev->base_addr));
break;
case 2:
/*
* make sure the next interrupt is generated;
* 0 must be used to power the modem; the modem draws its
* power from the TxD line
*/
outb(0x00, THR(dev->base_addr));
baycom_int_freq(bc);
txcount++;
/*
* first output the last bit (!) then call HDLC transmitter,
* since this may take quite long
*/
if (bc->modem.ptt)
outb(0x0e | (!!bc->modem.ser12.tx_bit), MCR(dev->base_addr));
else
outb(0x0d, MCR(dev->base_addr)); /* transmitter off */
break;
default:
msr = inb(MSR(dev->base_addr));
/* delta DCD */
if ((msr & 8) && bc->opt_dcd)
hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80));
break;
}
iir = inb(IIR(dev->base_addr));
} while (!(iir & 1));
ser12_rx(dev, bc, &ts, msr & 0x10); /* CTS */
if (bc->modem.ptt && txcount) {
if (bc->modem.ser12.txshreg <= 1) {
bc->modem.ser12.txshreg = 0x10000 | hdlcdrv_getbits(&bc->hdrv);
if (!hdlcdrv_ptt(&bc->hdrv)) {
ser12_set_divisor(dev, 115200/100/8);
bc->modem.ptt = 0;
goto end_transmit;
}
}
bc->modem.ser12.tx_bit = !(bc->modem.ser12.tx_bit ^ (bc->modem.ser12.txshreg & 1));
bc->modem.ser12.txshreg >>= 1;
}
end_transmit:
local_irq_enable();
if (!bc->modem.ptt && txcount) {
hdlcdrv_arbitrate(dev, &bc->hdrv);
if (hdlcdrv_ptt(&bc->hdrv)) {
ser12_set_divisor(dev, bc->baud_uartdiv);
bc->modem.ser12.txshreg = 1;
bc->modem.ptt = 1;
}
}
hdlcdrv_transmitter(dev, &bc->hdrv);
hdlcdrv_receiver(dev, &bc->hdrv);
local_irq_disable();
return IRQ_HANDLED;
}
/* --------------------------------------------------------------------- */
enum uart { c_uart_unknown, c_uart_8250,
c_uart_16450, c_uart_16550, c_uart_16550A};
static const char *uart_str[] = {
"unknown", "8250", "16450", "16550", "16550A"
};
static enum uart ser12_check_uart(unsigned int iobase)
{
unsigned char b1,b2,b3;
enum uart u;
enum uart uart_tab[] =
{ c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A };
b1 = inb(MCR(iobase));
outb(b1 | 0x10, MCR(iobase)); /* loopback mode */
b2 = inb(MSR(iobase));
outb(0x1a, MCR(iobase));
b3 = inb(MSR(iobase)) & 0xf0;
outb(b1, MCR(iobase)); /* restore old values */
outb(b2, MSR(iobase));
if (b3 != 0x90)
return c_uart_unknown;
inb(RBR(iobase));
inb(RBR(iobase));
outb(0x01, FCR(iobase)); /* enable FIFOs */
u = uart_tab[(inb(IIR(iobase)) >> 6) & 3];
if (u == c_uart_16450) {
outb(0x5a, SCR(iobase));
b1 = inb(SCR(iobase));
outb(0xa5, SCR(iobase));
b2 = inb(SCR(iobase));
if ((b1 != 0x5a) || (b2 != 0xa5))
u = c_uart_8250;
}
return u;
}
/* --------------------------------------------------------------------- */
static int ser12_open(struct net_device *dev)
{
const unsigned int nr_irqs = irq_get_nr_irqs();
struct baycom_state *bc = netdev_priv(dev);
enum uart u;
if (!dev || !bc)
return -ENXIO;
if (!dev->base_addr || dev->base_addr > 0xffff-SER12_EXTENT ||
dev->irq < 2 || dev->irq > nr_irqs) {
printk(KERN_INFO "baycom_ser_fdx: invalid portnumber (max %u) "
"or irq (2 <= irq <= %d)\n",
0xffff-SER12_EXTENT, nr_irqs);
return -ENXIO;
}
if (bc->baud < 300 || bc->baud > 4800) {
printk(KERN_INFO "baycom_ser_fdx: invalid baudrate "
"(300...4800)\n");
return -EINVAL;
}
if (!request_region(dev->base_addr, SER12_EXTENT, "baycom_ser_fdx")) {
printk(KERN_WARNING "BAYCOM_SER_FSX: I/O port 0x%04lx busy\n",
dev->base_addr);
return -EACCES;
}
memset(&bc->modem, 0, sizeof(bc->modem));
bc->hdrv.par.bitrate = bc->baud;
bc->baud_us = 1000000/bc->baud;
bc->baud_uartdiv = (115200/8)/bc->baud;
if ((u = ser12_check_uart(dev->base_addr)) == c_uart_unknown){
release_region(dev->base_addr, SER12_EXTENT);
return -EIO;
}
outb(0, FCR(dev->base_addr)); /* disable FIFOs */
outb(0x0d, MCR(dev->base_addr));
outb(0, IER(dev->base_addr));
if (request_irq(dev->irq, ser12_interrupt, IRQF_SHARED,
"baycom_ser_fdx", dev)) {
release_region(dev->base_addr, SER12_EXTENT);
return -EBUSY;
}
/*
* set the SIO to 6 Bits/character; during receive,
* the baud rate is set to produce 100 ints/sec
* to feed the channel arbitration process,
* during transmit to baud ints/sec to run
* the transmitter
*/
ser12_set_divisor(dev, 115200/100/8);
/*
* enable transmitter empty interrupt and modem status interrupt
*/
outb(0x0a, IER(dev->base_addr));
/*
* make sure the next interrupt is generated;
* 0 must be used to power the modem; the modem draws its
* power from the TxD line
*/
outb(0x00, THR(dev->base_addr));
hdlcdrv_setdcd(&bc->hdrv, 0);
printk(KERN_INFO "%s: ser_fdx at iobase 0x%lx irq %u baud %u uart %s\n",
bc_drvname, dev->base_addr, dev->irq, bc->baud, uart_str[u]);
return 0;
}
/* --------------------------------------------------------------------- */
static int ser12_close(struct net_device *dev)
{
struct baycom_state *bc = netdev_priv(dev);
if (!dev || !bc)
return -EINVAL;
/*
* disable interrupts
*/
outb(0, IER(dev->base_addr));
outb(1, MCR(dev->base_addr));
free_irq(dev->irq, dev);
release_region(dev->base_addr, SER12_EXTENT);
printk(KERN_INFO "%s: close ser_fdx at iobase 0x%lx irq %u\n",
bc_drvname, dev->base_addr, dev->irq);
return 0;
}
/* --------------------------------------------------------------------- */
/*
* ===================== hdlcdrv driver interface =========================
*/
/* --------------------------------------------------------------------- */
static int baycom_ioctl(struct net_device *dev, void __user *data,
struct hdlcdrv_ioctl *hi, int cmd);
/* --------------------------------------------------------------------- */
static const struct hdlcdrv_ops ser12_ops = {
.drvname = bc_drvname,
.drvinfo = bc_drvinfo,
.open = ser12_open,
.close = ser12_close,
.ioctl = baycom_ioctl,
};
/* --------------------------------------------------------------------- */
static int baycom_setmode(struct baycom_state *bc, const char *modestr)
{
unsigned int baud;
if (!strncmp(modestr, "ser", 3)) {
baud = simple_strtoul(modestr+3, NULL, 10);
if (baud >= 3 && baud <= 48)
bc->baud = baud*100;
}
if (strchr(modestr, '*'))
bc->opt_dcd = 0;
else if (strchr(modestr, '+'))
bc->opt_dcd = -1;
else
bc->opt_dcd = 1;
return 0;
}
/* --------------------------------------------------------------------- */
static int baycom_ioctl(struct net_device *dev, void __user *data,
struct hdlcdrv_ioctl *hi, int cmd)
{
struct baycom_state *bc;
struct baycom_ioctl bi;
if (!dev)
return -EINVAL;
bc = netdev_priv(dev);
BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC);
if (cmd != SIOCDEVPRIVATE)
return -ENOIOCTLCMD;
switch (hi->cmd) {
default:
break;
case HDLCDRVCTL_GETMODE:
sprintf(hi->data.modename, "ser%u", bc->baud / 100);
if (bc->opt_dcd <= 0)
strcat(hi->data.modename, (!bc->opt_dcd) ? "*" : "+");
if (copy_to_user(data, hi, sizeof(struct hdlcdrv_ioctl)))
return -EFAULT;
return 0;
case HDLCDRVCTL_SETMODE:
if (netif_running(dev) || !capable(CAP_NET_ADMIN))
return -EACCES;
hi->data.modename[sizeof(hi->data.modename)-1] = '\0';
return baycom_setmode(bc, hi->data.modename);
case HDLCDRVCTL_MODELIST:
strscpy(hi->data.modename, "ser12,ser3,ser24");
if (copy_to_user(data, hi, sizeof(struct hdlcdrv_ioctl)))
return -EFAULT;
return 0;
case HDLCDRVCTL_MODEMPARMASK:
return HDLCDRV_PARMASK_IOBASE | HDLCDRV_PARMASK_IRQ;
}
if (copy_from_user(&bi, data, sizeof(bi)))
return -EFAULT;
switch (bi.cmd) {
default:
return -ENOIOCTLCMD;
#ifdef BAYCOM_DEBUG
case BAYCOMCTL_GETDEBUG:
bi.data.dbg.debug1 = bc->hdrv.ptt_keyed;
bi.data.dbg.debug2 = bc->debug_vals.last_intcnt;
bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr;
break;
#endif /* BAYCOM_DEBUG */
}
if (copy_to_user(data, &bi, sizeof(bi)))
return -EFAULT;
return 0;
}
/* --------------------------------------------------------------------- */
/*
* command line settable parameters
*/
static char *mode[NR_PORTS] = { "ser12*", };
static int iobase[NR_PORTS] = { 0x3f8, };
static int irq[NR_PORTS] = { 4, };
static int baud[NR_PORTS] = { [0 ... NR_PORTS-1] = 1200 };
module_param_array(mode, charp, NULL, 0);
MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD");
module_param_hw_array(iobase, int, ioport, NULL, 0);
MODULE_PARM_DESC(iobase, "baycom io base address");
module_param_hw_array(irq, int, irq, NULL, 0);
MODULE_PARM_DESC(irq, "baycom irq number");
module_param_array(baud, int, NULL, 0);
MODULE_PARM_DESC(baud, "baycom baud rate (300 to 4800)");
MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
MODULE_DESCRIPTION("Baycom ser12 full duplex amateur radio modem driver");
MODULE_LICENSE("GPL");
/* --------------------------------------------------------------------- */
static int __init init_baycomserfdx(void)
{
int i, found = 0;
char set_hw = 1;
printk(bc_drvinfo);
/*
* register net devices
*/
for (i = 0; i < NR_PORTS; i++) {
struct net_device *dev;
struct baycom_state *bc;
char ifname[IFNAMSIZ];
sprintf(ifname, "bcsf%d", i);
if (!mode[i])
set_hw = 0;
if (!set_hw)
iobase[i] = irq[i] = 0;
dev = hdlcdrv_register(&ser12_ops,
sizeof(struct baycom_state),
ifname, iobase[i], irq[i], 0);
if (IS_ERR(dev))
break;
bc = netdev_priv(dev);
if (set_hw && baycom_setmode(bc, mode[i]))
set_hw = 0;
bc->baud = baud[i];
found++;
baycom_device[i] = dev;
}
if (!found)
return -ENXIO;
return 0;
}
static void __exit cleanup_baycomserfdx(void)
{
int i;
for(i = 0; i < NR_PORTS; i++) {
struct net_device *dev = baycom_device[i];
if (dev)
hdlcdrv_unregister(dev);
}
}
module_init(init_baycomserfdx);
module_exit(cleanup_baycomserfdx);
/* --------------------------------------------------------------------- */
#ifndef MODULE
/*
* format: baycom_ser_fdx=io,irq,mode
* mode: ser# hardware DCD
* ser#* software DCD
* ser#+ hardware DCD, inverted signal at DCD pin
* '#' denotes the baud rate / 100, eg. ser12* is '1200 baud, soft DCD'
*/
static int __init baycom_ser_fdx_setup(char *str)
{
static unsigned nr_dev;
int ints[4];
if (nr_dev >= NR_PORTS)
return 0;
str = get_options(str, 4, ints);
if (ints[0] < 2)
return 0;
mode[nr_dev] = str;
iobase[nr_dev] = ints[1];
irq[nr_dev] = ints[2];
if (ints[0] >= 3)
baud[nr_dev] = ints[3];
nr_dev++;
return 1;
}
__setup("baycom_ser_fdx=", baycom_ser_fdx_setup);
#endif /* MODULE */
/* --------------------------------------------------------------------- */

727
drivers/net/hamradio/baycom_ser_hdx.c
View File

@ -1,727 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*****************************************************************************/
/*
* baycom_ser_hdx.c -- baycom ser12 halfduplex radio modem driver.
*
* Copyright (C) 1996-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
*
* Please note that the GPL allows you to use the driver, NOT the radio.
* In order to use the radio, you need a license from the communications
* authority of your country.
*
* Supported modems
*
* ser12: This is a very simple 1200 baud AFSK modem. The modem consists only
* of a modulator/demodulator chip, usually a TI TCM3105. The computer
* is responsible for regenerating the receiver bit clock, as well as
* for handling the HDLC protocol. The modem connects to a serial port,
* hence the name. Since the serial port is not used as an async serial
* port, the kernel driver for serial ports cannot be used, and this
* driver only supports standard serial hardware (8250, 16450, 16550A)
*
* Command line options (insmod command line)
*
* mode ser12 hardware DCD
* ser12* software DCD
* ser12@ hardware/software DCD, i.e. no explicit DCD signal but hardware
* mutes audio input to the modem
* ser12+ hardware DCD, inverted signal at DCD pin
* iobase base address of the port; common values are 0x3f8, 0x2f8, 0x3e8, 0x2e8
* irq interrupt line of the port; common values are 4,3
*
* History:
* 0.1 26.06.1996 Adapted from baycom.c and made network driver interface
* 18.10.1996 Changed to new user space access routines (copy_{to,from}_user)
* 0.3 26.04.1997 init code/data tagged
* 0.4 08.07.1997 alternative ser12 decoding algorithm (uses delta CTS ints)
* 0.5 11.11.1997 ser12/par96 split into separate files
* 0.6 14.04.1998 cleanups
* 0.7 03.08.1999 adapt to Linus' new __setup/__initcall
* 0.8 10.08.1999 use module_init/module_exit
* 0.9 12.02.2000 adapted to softnet driver interface
* 0.10 03.07.2000 fix interface name handling
*/
/*****************************************************************************/
#include <linux/capability.h>
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/uaccess.h>
#include <asm/io.h>
#include <linux/hdlcdrv.h>
#include <linux/baycom.h>
#include <linux/jiffies.h>
/* --------------------------------------------------------------------- */
#define BAYCOM_DEBUG
/* --------------------------------------------------------------------- */
static const char bc_drvname[] = "baycom_ser_hdx";
static const char bc_drvinfo[] = KERN_INFO "baycom_ser_hdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA\n"
"baycom_ser_hdx: version 0.10\n";
/* --------------------------------------------------------------------- */
#define NR_PORTS 4
static struct net_device *baycom_device[NR_PORTS];
/* --------------------------------------------------------------------- */
#define RBR(iobase) (iobase+0)
#define THR(iobase) (iobase+0)
#define IER(iobase) (iobase+1)
#define IIR(iobase) (iobase+2)
#define FCR(iobase) (iobase+2)
#define LCR(iobase) (iobase+3)
#define MCR(iobase) (iobase+4)
#define LSR(iobase) (iobase+5)
#define MSR(iobase) (iobase+6)
#define SCR(iobase) (iobase+7)
#define DLL(iobase) (iobase+0)
#define DLM(iobase) (iobase+1)
#define SER12_EXTENT 8
/* ---------------------------------------------------------------------- */
/*
* Information that need to be kept for each board.
*/
struct baycom_state {
struct hdlcdrv_state hdrv;
int opt_dcd;
struct modem_state {
short arb_divider;
unsigned char flags;
unsigned int shreg;
struct modem_state_ser12 {
unsigned char tx_bit;
int dcd_sum0, dcd_sum1, dcd_sum2;
unsigned char last_sample;
unsigned char last_rxbit;
unsigned int dcd_shreg;
unsigned int dcd_time;
unsigned int bit_pll;
unsigned char interm_sample;
} ser12;
} modem;
#ifdef BAYCOM_DEBUG
struct debug_vals {
unsigned long last_jiffies;
unsigned cur_intcnt;
unsigned last_intcnt;
int cur_pllcorr;
int last_pllcorr;
} debug_vals;
#endif /* BAYCOM_DEBUG */
};
/* --------------------------------------------------------------------- */
static inline void baycom_int_freq(struct baycom_state *bc)
{
#ifdef BAYCOM_DEBUG
unsigned long cur_jiffies = jiffies;
/*
* measure the interrupt frequency
*/
bc->debug_vals.cur_intcnt++;
if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) {
bc->debug_vals.last_jiffies = cur_jiffies;
bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt;
bc->debug_vals.cur_intcnt = 0;
bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr;
bc->debug_vals.cur_pllcorr = 0;
}
#endif /* BAYCOM_DEBUG */
}
/* --------------------------------------------------------------------- */
/*
* ===================== SER12 specific routines =========================
*/
static inline void ser12_set_divisor(struct net_device *dev,
unsigned char divisor)
{
outb(0x81, LCR(dev->base_addr)); /* DLAB = 1 */
outb(divisor, DLL(dev->base_addr));
outb(0, DLM(dev->base_addr));
outb(0x01, LCR(dev->base_addr)); /* word length = 6 */
/*
* make sure the next interrupt is generated;
* 0 must be used to power the modem; the modem draws its
* power from the TxD line
*/
outb(0x00, THR(dev->base_addr));
/*
* it is important not to set the divider while transmitting;
* this reportedly makes some UARTs generating interrupts
* in the hundredthousands per second region
* Reported by: Ignacio.Arenaza@studi.epfl.ch (Ignacio Arenaza Nuno)
*/
}
/* --------------------------------------------------------------------- */
/*
* must call the TX arbitrator every 10ms
*/
#define SER12_ARB_DIVIDER(bc) (bc->opt_dcd ? 24 : 36)
#define SER12_DCD_INTERVAL(bc) (bc->opt_dcd ? 12 : 240)
static inline void ser12_tx(struct net_device *dev, struct baycom_state *bc)
{
/* one interrupt per channel bit */
ser12_set_divisor(dev, 12);
/*
* first output the last bit (!) then call HDLC transmitter,
* since this may take quite long
*/
outb(0x0e | (!!bc->modem.ser12.tx_bit), MCR(dev->base_addr));
if (bc->modem.shreg <= 1)
bc->modem.shreg = 0x10000 | hdlcdrv_getbits(&bc->hdrv);
bc->modem.ser12.tx_bit = !(bc->modem.ser12.tx_bit ^
(bc->modem.shreg & 1));
bc->modem.shreg >>= 1;
}
/* --------------------------------------------------------------------- */
static inline void ser12_rx(struct net_device *dev, struct baycom_state *bc)
{
unsigned char cur_s;
/*
* do demodulator
*/
cur_s = inb(MSR(dev->base_addr)) & 0x10; /* the CTS line */
hdlcdrv_channelbit(&bc->hdrv, cur_s);
bc->modem.ser12.dcd_shreg = (bc->modem.ser12.dcd_shreg << 1) |
(cur_s != bc->modem.ser12.last_sample);
bc->modem.ser12.last_sample = cur_s;
if(bc->modem.ser12.dcd_shreg & 1) {
if (!bc->opt_dcd) {
unsigned int dcdspos, dcdsneg;
dcdspos = dcdsneg = 0;
dcdspos += ((bc->modem.ser12.dcd_shreg >> 1) & 1);
if (!(bc->modem.ser12.dcd_shreg & 0x7ffffffe))
dcdspos += 2;
dcdsneg += ((bc->modem.ser12.dcd_shreg >> 2) & 1);
dcdsneg += ((bc->modem.ser12.dcd_shreg >> 3) & 1);
dcdsneg += ((bc->modem.ser12.dcd_shreg >> 4) & 1);
bc->modem.ser12.dcd_sum0 += 16*dcdspos - dcdsneg;
} else
bc->modem.ser12.dcd_sum0--;
}
if(!bc->modem.ser12.dcd_time) {
hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 +
bc->modem.ser12.dcd_sum1 +
bc->modem.ser12.dcd_sum2) < 0);
bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1;
bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0;
/* offset to ensure DCD off on silent input */
bc->modem.ser12.dcd_sum0 = 2;
bc->modem.ser12.dcd_time = SER12_DCD_INTERVAL(bc);
}
bc->modem.ser12.dcd_time--;
if (!bc->opt_dcd) {
/*
* PLL code for the improved software DCD algorithm
*/
if (bc->modem.ser12.interm_sample) {
/*
* intermediate sample; set timing correction to normal
*/
ser12_set_divisor(dev, 4);
} else {
/*
* do PLL correction and call HDLC receiver
*/
switch (bc->modem.ser12.dcd_shreg & 7) {
case 1: /* transition too late */
ser12_set_divisor(dev, 5);
#ifdef BAYCOM_DEBUG
bc->debug_vals.cur_pllcorr++;
#endif /* BAYCOM_DEBUG */
break;
case 4: /* transition too early */
ser12_set_divisor(dev, 3);
#ifdef BAYCOM_DEBUG
bc->debug_vals.cur_pllcorr--;
#endif /* BAYCOM_DEBUG */
break;
default:
ser12_set_divisor(dev, 4);
break;
}
bc->modem.shreg >>= 1;
if (bc->modem.ser12.last_sample ==
bc->modem.ser12.last_rxbit)
bc->modem.shreg |= 0x10000;
bc->modem.ser12.last_rxbit =
bc->modem.ser12.last_sample;
}
if (++bc->modem.ser12.interm_sample >= 3)
bc->modem.ser12.interm_sample = 0;
/*
* DCD stuff
*/
if (bc->modem.ser12.dcd_shreg & 1) {
unsigned int dcdspos, dcdsneg;
dcdspos = dcdsneg = 0;
dcdspos += ((bc->modem.ser12.dcd_shreg >> 1) & 1);
dcdspos += (!(bc->modem.ser12.dcd_shreg & 0x7ffffffe))
<< 1;
dcdsneg += ((bc->modem.ser12.dcd_shreg >> 2) & 1);
dcdsneg += ((bc->modem.ser12.dcd_shreg >> 3) & 1);
dcdsneg += ((bc->modem.ser12.dcd_shreg >> 4) & 1);
bc->modem.ser12.dcd_sum0 += 16*dcdspos - dcdsneg;
}
} else {
/*
* PLL algorithm for the hardware squelch DCD algorithm
*/
if (bc->modem.ser12.interm_sample) {
/*
* intermediate sample; set timing correction to normal
*/
ser12_set_divisor(dev, 6);
} else {
/*
* do PLL correction and call HDLC receiver
*/
switch (bc->modem.ser12.dcd_shreg & 3) {
case 1: /* transition too late */
ser12_set_divisor(dev, 7);
#ifdef BAYCOM_DEBUG
bc->debug_vals.cur_pllcorr++;
#endif /* BAYCOM_DEBUG */
break;
case 2: /* transition too early */
ser12_set_divisor(dev, 5);
#ifdef BAYCOM_DEBUG
bc->debug_vals.cur_pllcorr--;
#endif /* BAYCOM_DEBUG */
break;
default:
ser12_set_divisor(dev, 6);
break;
}
bc->modem.shreg >>= 1;
if (bc->modem.ser12.last_sample ==
bc->modem.ser12.last_rxbit)
bc->modem.shreg |= 0x10000;
bc->modem.ser12.last_rxbit =
bc->modem.ser12.last_sample;
}
bc->modem.ser12.interm_sample = !bc->modem.ser12.interm_sample;
/*
* DCD stuff
*/
bc->modem.ser12.dcd_sum0 -= (bc->modem.ser12.dcd_shreg & 1);
}
outb(0x0d, MCR(dev->base_addr)); /* transmitter off */
if (bc->modem.shreg & 1) {
hdlcdrv_putbits(&bc->hdrv, bc->modem.shreg >> 1);
bc->modem.shreg = 0x10000;
}
if(!bc->modem.ser12.dcd_time) {
if (bc->opt_dcd & 1)
hdlcdrv_setdcd(&bc->hdrv, !((inb(MSR(dev->base_addr)) ^ bc->opt_dcd) & 0x80));
else
hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 +
bc->modem.ser12.dcd_sum1 +
bc->modem.ser12.dcd_sum2) < 0);
bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1;
bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0;
/* offset to ensure DCD off on silent input */
bc->modem.ser12.dcd_sum0 = 2;
bc->modem.ser12.dcd_time = SER12_DCD_INTERVAL(bc);
}
bc->modem.ser12.dcd_time--;
}
/* --------------------------------------------------------------------- */
static irqreturn_t ser12_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *)dev_id;
struct baycom_state *bc = netdev_priv(dev);
unsigned char iir;
if (!dev || !bc || bc->hdrv.magic != HDLCDRV_MAGIC)
return IRQ_NONE;
/* fast way out */
if ((iir = inb(IIR(dev->base_addr))) & 1)
return IRQ_NONE;
baycom_int_freq(bc);
do {
switch (iir & 6) {
case 6:
inb(LSR(dev->base_addr));
break;
case 4:
inb(RBR(dev->base_addr));
break;
case 2:
/*
* check if transmitter active
*/
if (hdlcdrv_ptt(&bc->hdrv))
ser12_tx(dev, bc);
else {
ser12_rx(dev, bc);
bc->modem.arb_divider--;
}
outb(0x00, THR(dev->base_addr));
break;
default:
inb(MSR(dev->base_addr));
break;
}
iir = inb(IIR(dev->base_addr));
} while (!(iir & 1));
if (bc->modem.arb_divider <= 0) {
bc->modem.arb_divider = SER12_ARB_DIVIDER(bc);
local_irq_enable();
hdlcdrv_arbitrate(dev, &bc->hdrv);
}
local_irq_enable();
hdlcdrv_transmitter(dev, &bc->hdrv);
hdlcdrv_receiver(dev, &bc->hdrv);
local_irq_disable();
return IRQ_HANDLED;
}
/* --------------------------------------------------------------------- */
enum uart { c_uart_unknown, c_uart_8250,
c_uart_16450, c_uart_16550, c_uart_16550A};
static const char *uart_str[] = {
"unknown", "8250", "16450", "16550", "16550A"
};
static enum uart ser12_check_uart(unsigned int iobase)
{
unsigned char b1,b2,b3;
enum uart u;
enum uart uart_tab[] =
{ c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A };
b1 = inb(MCR(iobase));
outb(b1 | 0x10, MCR(iobase)); /* loopback mode */
b2 = inb(MSR(iobase));
outb(0x1a, MCR(iobase));
b3 = inb(MSR(iobase)) & 0xf0;
outb(b1, MCR(iobase)); /* restore old values */
outb(b2, MSR(iobase));
if (b3 != 0x90)
return c_uart_unknown;
inb(RBR(iobase));
inb(RBR(iobase));
outb(0x01, FCR(iobase)); /* enable FIFOs */
u = uart_tab[(inb(IIR(iobase)) >> 6) & 3];
if (u == c_uart_16450) {
outb(0x5a, SCR(iobase));
b1 = inb(SCR(iobase));
outb(0xa5, SCR(iobase));
b2 = inb(SCR(iobase));
if ((b1 != 0x5a) || (b2 != 0xa5))
u = c_uart_8250;
}
return u;
}
/* --------------------------------------------------------------------- */
static int ser12_open(struct net_device *dev)
{
struct baycom_state *bc = netdev_priv(dev);
enum uart u;
if (!dev || !bc)
return -ENXIO;
if (!dev->base_addr || dev->base_addr > 0x1000-SER12_EXTENT ||
dev->irq < 2 || dev->irq > 15)
return -ENXIO;
if (!request_region(dev->base_addr, SER12_EXTENT, "baycom_ser12"))
return -EACCES;
memset(&bc->modem, 0, sizeof(bc->modem));
bc->hdrv.par.bitrate = 1200;
if ((u = ser12_check_uart(dev->base_addr)) == c_uart_unknown) {
release_region(dev->base_addr, SER12_EXTENT);
return -EIO;
}
outb(0, FCR(dev->base_addr)); /* disable FIFOs */
outb(0x0d, MCR(dev->base_addr));
outb(0, IER(dev->base_addr));
if (request_irq(dev->irq, ser12_interrupt, IRQF_SHARED,
"baycom_ser12", dev)) {
release_region(dev->base_addr, SER12_EXTENT);
return -EBUSY;
}
/*
* enable transmitter empty interrupt
*/
outb(2, IER(dev->base_addr));
/*
* set the SIO to 6 Bits/character and 19200 or 28800 baud, so that
* we get exactly (hopefully) 2 or 3 interrupts per radio symbol,
* depending on the usage of the software DCD routine
*/
ser12_set_divisor(dev, bc->opt_dcd ? 6 : 4);
printk(KERN_INFO "%s: ser12 at iobase 0x%lx irq %u uart %s\n",
bc_drvname, dev->base_addr, dev->irq, uart_str[u]);
return 0;
}
/* --------------------------------------------------------------------- */
static int ser12_close(struct net_device *dev)
{
struct baycom_state *bc = netdev_priv(dev);
if (!dev || !bc)
return -EINVAL;
/*
* disable interrupts
*/
outb(0, IER(dev->base_addr));
outb(1, MCR(dev->base_addr));
free_irq(dev->irq, dev);
release_region(dev->base_addr, SER12_EXTENT);
printk(KERN_INFO "%s: close ser12 at iobase 0x%lx irq %u\n",
bc_drvname, dev->base_addr, dev->irq);
return 0;
}
/* --------------------------------------------------------------------- */
/*
* ===================== hdlcdrv driver interface =========================
*/
/* --------------------------------------------------------------------- */
static int baycom_ioctl(struct net_device *dev, void __user *data,
struct hdlcdrv_ioctl *hi, int cmd);
/* --------------------------------------------------------------------- */
static const struct hdlcdrv_ops ser12_ops = {
.drvname = bc_drvname,
.drvinfo = bc_drvinfo,
.open = ser12_open,
.close = ser12_close,
.ioctl = baycom_ioctl,
};
/* --------------------------------------------------------------------- */
static int baycom_setmode(struct baycom_state *bc, const char *modestr)
{
if (strchr(modestr, '*'))
bc->opt_dcd = 0;
else if (strchr(modestr, '+'))
bc->opt_dcd = -1;
else if (strchr(modestr, '@'))
bc->opt_dcd = -2;
else
bc->opt_dcd = 1;
return 0;
}
/* --------------------------------------------------------------------- */
static int baycom_ioctl(struct net_device *dev, void __user *data,
struct hdlcdrv_ioctl *hi, int cmd)
{
struct baycom_state *bc;
struct baycom_ioctl bi;
if (!dev)
return -EINVAL;
bc = netdev_priv(dev);
BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC);
if (cmd != SIOCDEVPRIVATE)
return -ENOIOCTLCMD;
switch (hi->cmd) {
default:
break;
case HDLCDRVCTL_GETMODE:
strscpy(hi->data.modename, "ser12");
if (bc->opt_dcd <= 0)
strcat(hi->data.modename, (!bc->opt_dcd) ? "*" : (bc->opt_dcd == -2) ? "@" : "+");
if (copy_to_user(data, hi, sizeof(struct hdlcdrv_ioctl)))
return -EFAULT;
return 0;
case HDLCDRVCTL_SETMODE:
if (netif_running(dev) || !capable(CAP_NET_ADMIN))
return -EACCES;
hi->data.modename[sizeof(hi->data.modename)-1] = '\0';
return baycom_setmode(bc, hi->data.modename);
case HDLCDRVCTL_MODELIST:
strscpy(hi->data.modename, "ser12");
if (copy_to_user(data, hi, sizeof(struct hdlcdrv_ioctl)))
return -EFAULT;
return 0;
case HDLCDRVCTL_MODEMPARMASK:
return HDLCDRV_PARMASK_IOBASE | HDLCDRV_PARMASK_IRQ;
}
if (copy_from_user(&bi, data, sizeof(bi)))
return -EFAULT;
switch (bi.cmd) {
default:
return -ENOIOCTLCMD;
#ifdef BAYCOM_DEBUG
case BAYCOMCTL_GETDEBUG:
bi.data.dbg.debug1 = bc->hdrv.ptt_keyed;
bi.data.dbg.debug2 = bc->debug_vals.last_intcnt;
bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr;
break;
#endif /* BAYCOM_DEBUG */
}
if (copy_to_user(data, &bi, sizeof(bi)))
return -EFAULT;
return 0;
}
/* --------------------------------------------------------------------- */
/*
* command line settable parameters
*/
static char *mode[NR_PORTS] = { "ser12*", };
static int iobase[NR_PORTS] = { 0x3f8, };
static int irq[NR_PORTS] = { 4, };
module_param_array(mode, charp, NULL, 0);
MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD");
module_param_hw_array(iobase, int, ioport, NULL, 0);
MODULE_PARM_DESC(iobase, "baycom io base address");
module_param_hw_array(irq, int, irq, NULL, 0);
MODULE_PARM_DESC(irq, "baycom irq number");
MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
MODULE_DESCRIPTION("Baycom ser12 half duplex amateur radio modem driver");
MODULE_LICENSE("GPL");
/* --------------------------------------------------------------------- */
static int __init init_baycomserhdx(void)
{
int i, found = 0;
char set_hw = 1;
printk(bc_drvinfo);
/*
* register net devices
*/
for (i = 0; i < NR_PORTS; i++) {
struct net_device *dev;
struct baycom_state *bc;
char ifname[IFNAMSIZ];
sprintf(ifname, "bcsh%d", i);
if (!mode[i])
set_hw = 0;
if (!set_hw)
iobase[i] = irq[i] = 0;
dev = hdlcdrv_register(&ser12_ops,
sizeof(struct baycom_state),
ifname, iobase[i], irq[i], 0);
if (IS_ERR(dev))
break;
bc = netdev_priv(dev);
if (set_hw && baycom_setmode(bc, mode[i]))
set_hw = 0;
found++;
baycom_device[i] = dev;
}
if (!found)
return -ENXIO;
return 0;
}
static void __exit cleanup_baycomserhdx(void)
{
int i;
for(i = 0; i < NR_PORTS; i++) {
struct net_device *dev = baycom_device[i];
if (dev)
hdlcdrv_unregister(dev);
}
}
module_init(init_baycomserhdx);
module_exit(cleanup_baycomserhdx);
/* --------------------------------------------------------------------- */
#ifndef MODULE
/*
* format: baycom_ser_hdx=io,irq,mode
* mode: ser12 hardware DCD
* ser12* software DCD
* ser12@ hardware/software DCD, i.e. no explicit DCD signal but hardware
* mutes audio input to the modem
* ser12+ hardware DCD, inverted signal at DCD pin
*/
static int __init baycom_ser_hdx_setup(char *str)
{
static unsigned nr_dev;
int ints[3];
if (nr_dev >= NR_PORTS)
return 0;
str = get_options(str, 3, ints);
if (ints[0] < 2)
return 0;
mode[nr_dev] = str;
iobase[nr_dev] = ints[1];
irq[nr_dev] = ints[2];
nr_dev++;
return 1;
}
__setup("baycom_ser_hdx=", baycom_ser_hdx_setup);
#endif /* MODULE */
/* --------------------------------------------------------------------- */

593
drivers/net/hamradio/bpqether.c
View File

@ -1,593 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* G8BPQ compatible "AX.25 via ethernet" driver release 004
*
* This code REQUIRES 2.0.0 or higher/ NET3.029
*
* This is a "pseudo" network driver to allow AX.25 over Ethernet
* using G8BPQ encapsulation. It has been extracted from the protocol
* implementation because
*
* - things got unreadable within the protocol stack
* - to cure the protocol stack from "feature-ism"
* - a protocol implementation shouldn't need to know on
* which hardware it is running
* - user-level programs like the AX.25 utilities shouldn't
* need to know about the hardware.
* - IP over ethernet encapsulated AX.25 was impossible
* - rxecho.c did not work
* - to have room for extensions
* - it just deserves to "live" as an own driver
*
* This driver can use any ethernet destination address, and can be
* limited to accept frames from one dedicated ethernet card only.
*
* Note that the driver sets up the BPQ devices automagically on
* startup or (if started before the "insmod" of an ethernet device)
* on "ifconfig up". It hopefully will remove the BPQ on "rmmod"ing
* the ethernet device (in fact: as soon as another ethernet or bpq
* device gets "ifconfig"ured).
*
* I have heard that several people are thinking of experiments
* with highspeed packet radio using existing ethernet cards.
* Well, this driver is prepared for this purpose, just add
* your tx key control and a txdelay / tailtime algorithm,
* probably some buffering, and /voila/...
*
* History
* BPQ 001 Joerg(DL1BKE) Extracted BPQ code from AX.25
* protocol stack and added my own
* yet existing patches
* BPQ 002 Joerg(DL1BKE) Scan network device list on
* startup.
* BPQ 003 Joerg(DL1BKE) Ethernet destination address
* and accepted source address
* can be configured by an ioctl()
* call.
* Fixed to match Linux networking
* changes - 2.1.15.
* BPQ 004 Joerg(DL1BKE) Fixed to not lock up on ifconfig.
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/net.h>
#include <linux/slab.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/stat.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/rtnetlink.h>
#include <net/ip.h>
#include <net/arp.h>
#include <net/netdev_lock.h>
#include <net/net_namespace.h>
#include <linux/bpqether.h>
static const char banner[] __initconst = KERN_INFO \
"AX.25: bpqether driver version 004\n";
static int bpq_rcv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *);
static int bpq_device_event(struct notifier_block *, unsigned long, void *);
static struct packet_type bpq_packet_type __read_mostly = {
.type = cpu_to_be16(ETH_P_BPQ),
.func = bpq_rcv,
};
static struct notifier_block bpq_dev_notifier = {
.notifier_call = bpq_device_event,
};
struct bpqdev {
struct list_head bpq_list; /* list of bpq devices chain */
struct net_device *ethdev; /* link to ethernet device */
struct net_device *axdev; /* bpq device (bpq#) */
char dest_addr[6]; /* ether destination address */
char acpt_addr[6]; /* accept ether frames from this address only */
};
static LIST_HEAD(bpq_devices);
/* ------------------------------------------------------------------------ */
/*
* Get the ethernet device for a BPQ device
*/
static inline struct net_device *bpq_get_ether_dev(struct net_device *dev)
{
struct bpqdev *bpq = netdev_priv(dev);
return bpq ? bpq->ethdev : NULL;
}
/*
* Get the BPQ device for the ethernet device
*/
static inline struct net_device *bpq_get_ax25_dev(struct net_device *dev)
{
struct bpqdev *bpq;
list_for_each_entry_rcu(bpq, &bpq_devices, bpq_list,
lockdep_rtnl_is_held()) {
if (bpq->ethdev == dev)
return bpq->axdev;
}
return NULL;
}
static inline int dev_is_ethdev(struct net_device *dev)
{
return dev->type == ARPHRD_ETHER && !netdev_need_ops_lock(dev);
}
/* ------------------------------------------------------------------------ */
/*
* Receive an AX.25 frame via an ethernet interface.
*/
static int bpq_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *ptype, struct net_device *orig_dev)
{
int len;
char * ptr;
struct ethhdr *eth;
struct bpqdev *bpq;
if (!net_eq(dev_net(dev), &init_net))
goto drop;
if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
return NET_RX_DROP;
if (!pskb_may_pull(skb, sizeof(struct ethhdr)))
goto drop;
rcu_read_lock();
dev = bpq_get_ax25_dev(dev);
if (dev == NULL || !netif_running(dev))
goto drop_unlock;
/*
* if we want to accept frames from just one ethernet device
* we check the source address of the sender.
*/
bpq = netdev_priv(dev);
eth = eth_hdr(skb);
if (!(bpq->acpt_addr[0] & 0x01) &&
!ether_addr_equal(eth->h_source, bpq->acpt_addr))
goto drop_unlock;
if (skb_cow(skb, sizeof(struct ethhdr)))
goto drop_unlock;
len = skb->data[0] + skb->data[1] * 256 - 5;
if (len < 0 || len > skb->len - 2)
goto drop_unlock;
skb_pull(skb, 2); /* Remove the length bytes */
skb_trim(skb, len); /* Set the length of the data */
dev->stats.rx_packets++;
dev->stats.rx_bytes += len;
ptr = skb_push(skb, 1);
*ptr = 0;
skb->protocol = ax25_type_trans(skb, dev);
netif_rx(skb);
unlock:
rcu_read_unlock();
return 0;
drop_unlock:
kfree_skb(skb);
goto unlock;
drop:
kfree_skb(skb);
return 0;
}
/*
* Send an AX.25 frame via an ethernet interface
*/
static netdev_tx_t bpq_xmit(struct sk_buff *skb, struct net_device *dev)
{
unsigned char *ptr;
struct bpqdev *bpq;
struct net_device *orig_dev;
int size;
if (skb->protocol == htons(ETH_P_IP))
return ax25_ip_xmit(skb);
/*
* Just to be *really* sure not to send anything if the interface
* is down, the ethernet device may have gone.
*/
if (!netif_running(dev)) {
kfree_skb(skb);
return NETDEV_TX_OK;
}
skb_pull(skb, 1); /* Drop KISS byte */
size = skb->len;
/*
* We're about to mess with the skb which may still shared with the
* generic networking code so unshare and ensure it's got enough
* space for the BPQ headers.
*/
if (skb_cow(skb, AX25_BPQ_HEADER_LEN)) {
if (net_ratelimit())
pr_err("bpqether: out of memory\n");
kfree_skb(skb);
return NETDEV_TX_OK;
}
ptr = skb_push(skb, 2); /* Make space for length */
*ptr++ = (size + 5) % 256;
*ptr++ = (size + 5) / 256;
bpq = netdev_priv(dev);
orig_dev = dev;
if ((dev = bpq_get_ether_dev(dev)) == NULL) {
orig_dev->stats.tx_dropped++;
kfree_skb(skb);
return NETDEV_TX_OK;
}
skb->protocol = ax25_type_trans(skb, dev);
skb_reset_network_header(skb);
dev_hard_header(skb, dev, ETH_P_BPQ, bpq->dest_addr, NULL, 0);
dev->stats.tx_packets++;
dev->stats.tx_bytes+=skb->len;
dev_queue_xmit(skb);
netif_wake_queue(dev);
return NETDEV_TX_OK;
}
/*
* Set AX.25 callsign
*/
static int bpq_set_mac_address(struct net_device *dev, void *addr)
{
struct sockaddr *sa = (struct sockaddr *)addr;
dev_addr_set(dev, sa->sa_data);
return 0;
}
/* Ioctl commands
*
* SIOCSBPQETHOPT reserved for enhancements
* SIOCSBPQETHADDR set the destination and accepted
* source ethernet address (broadcast
* or multicast: accept all)
*/
static int bpq_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
void __user *data, int cmd)
{
struct bpq_ethaddr __user *ethaddr = data;
struct bpqdev *bpq = netdev_priv(dev);
struct bpq_req req;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
switch (cmd) {
case SIOCSBPQETHOPT:
if (copy_from_user(&req, data, sizeof(struct bpq_req)))
return -EFAULT;
switch (req.cmd) {
case SIOCGBPQETHPARAM:
case SIOCSBPQETHPARAM:
default:
return -EINVAL;
}
break;
case SIOCSBPQETHADDR:
if (copy_from_user(bpq->dest_addr, ethaddr->destination, ETH_ALEN))
return -EFAULT;
if (copy_from_user(bpq->acpt_addr, ethaddr->accept, ETH_ALEN))
return -EFAULT;
break;
default:
return -EINVAL;
}
return 0;
}
/*
* open/close a device
*/
static int bpq_open(struct net_device *dev)
{
netif_start_queue(dev);
return 0;
}
static int bpq_close(struct net_device *dev)
{
netif_stop_queue(dev);
return 0;
}
/* ------------------------------------------------------------------------ */
#ifdef CONFIG_PROC_FS
/*
* Proc filesystem
*/
static void *bpq_seq_start(struct seq_file *seq, loff_t *pos)
__acquires(RCU)
{
int i = 1;
struct bpqdev *bpqdev;
rcu_read_lock();
if (*pos == 0)
return SEQ_START_TOKEN;
list_for_each_entry_rcu(bpqdev, &bpq_devices, bpq_list) {
if (i == *pos)
return bpqdev;
}
return NULL;
}
static void *bpq_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct list_head *p;
struct bpqdev *bpqdev = v;
++*pos;
if (v == SEQ_START_TOKEN)
p = rcu_dereference(list_next_rcu(&bpq_devices));
else
p = rcu_dereference(list_next_rcu(&bpqdev->bpq_list));
return (p == &bpq_devices) ? NULL
: list_entry(p, struct bpqdev, bpq_list);
}
static void bpq_seq_stop(struct seq_file *seq, void *v)
__releases(RCU)
{
rcu_read_unlock();
}
static int bpq_seq_show(struct seq_file *seq, void *v)
{
if (v == SEQ_START_TOKEN)
seq_puts(seq,
"dev ether destination accept from\n");
else {
const struct bpqdev *bpqdev = v;
seq_printf(seq, "%-5s %-10s %pM ",
bpqdev->axdev->name, bpqdev->ethdev->name,
bpqdev->dest_addr);
if (is_multicast_ether_addr(bpqdev->acpt_addr))
seq_printf(seq, "*\n");
else
seq_printf(seq, "%pM\n", bpqdev->acpt_addr);
}
return 0;
}
static const struct seq_operations bpq_seqops = {
.start = bpq_seq_start,
.next = bpq_seq_next,
.stop = bpq_seq_stop,
.show = bpq_seq_show,
};
#endif
/* ------------------------------------------------------------------------ */
static const struct net_device_ops bpq_netdev_ops = {
.ndo_open = bpq_open,
.ndo_stop = bpq_close,
.ndo_start_xmit = bpq_xmit,
.ndo_set_mac_address = bpq_set_mac_address,
.ndo_siocdevprivate = bpq_siocdevprivate,
};
static void bpq_setup(struct net_device *dev)
{
netdev_lockdep_set_classes(dev);
dev->netdev_ops = &bpq_netdev_ops;
dev->needs_free_netdev = true;
dev->flags = 0;
dev->lltx = true; /* Allow recursion */
#if IS_ENABLED(CONFIG_AX25)
dev->header_ops = &ax25_header_ops;
#endif
dev->type = ARPHRD_AX25;
dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN;
dev->mtu = AX25_DEF_PACLEN;
dev->addr_len = AX25_ADDR_LEN;
memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
dev_addr_set(dev, (u8 *)&ax25_defaddr);
}
/*
* Setup a new device.
*/
static int bpq_new_device(struct net_device *edev)
{
int err;
struct net_device *ndev;
struct bpqdev *bpq;
ndev = alloc_netdev(sizeof(struct bpqdev), "bpq%d", NET_NAME_UNKNOWN,
bpq_setup);
if (!ndev)
return -ENOMEM;
bpq = netdev_priv(ndev);
dev_hold(edev);
bpq->ethdev = edev;
bpq->axdev = ndev;
eth_broadcast_addr(bpq->dest_addr);
eth_broadcast_addr(bpq->acpt_addr);
err = register_netdevice(ndev);
if (err)
goto error;
/* List protected by RTNL */
list_add_rcu(&bpq->bpq_list, &bpq_devices);
return 0;
error:
dev_put(edev);
free_netdev(ndev);
return err;
}
static void bpq_free_device(struct net_device *ndev)
{
struct bpqdev *bpq = netdev_priv(ndev);
dev_put(bpq->ethdev);
list_del_rcu(&bpq->bpq_list);
unregister_netdevice(ndev);
}
/*
* Handle device status changes.
*/
static int bpq_device_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
if (!net_eq(dev_net(dev), &init_net))
return NOTIFY_DONE;
if (!dev_is_ethdev(dev) && !bpq_get_ax25_dev(dev))
return NOTIFY_DONE;
switch (event) {
case NETDEV_UP: /* new ethernet device -> new BPQ interface */
if (bpq_get_ax25_dev(dev) == NULL)
bpq_new_device(dev);
break;
case NETDEV_DOWN: /* ethernet device closed -> close BPQ interface */
if ((dev = bpq_get_ax25_dev(dev)) != NULL)
dev_close(dev);
break;
case NETDEV_UNREGISTER: /* ethernet device removed -> free BPQ interface */
if ((dev = bpq_get_ax25_dev(dev)) != NULL)
bpq_free_device(dev);
break;
default:
break;
}
return NOTIFY_DONE;
}
/* ------------------------------------------------------------------------ */
/*
* Initialize driver. To be called from af_ax25 if not compiled as a
* module
*/
static int __init bpq_init_driver(void)
{
#ifdef CONFIG_PROC_FS
if (!proc_create_seq("bpqether", 0444, init_net.proc_net, &bpq_seqops)) {
printk(KERN_ERR
"bpq: cannot create /proc/net/bpqether entry.\n");
return -ENOENT;
}
#endif /* CONFIG_PROC_FS */
dev_add_pack(&bpq_packet_type);
register_netdevice_notifier(&bpq_dev_notifier);
printk(banner);
return 0;
}
static void __exit bpq_cleanup_driver(void)
{
struct bpqdev *bpq;
dev_remove_pack(&bpq_packet_type);
unregister_netdevice_notifier(&bpq_dev_notifier);
remove_proc_entry("bpqether", init_net.proc_net);
rtnl_lock();
while (!list_empty(&bpq_devices)) {
bpq = list_entry(bpq_devices.next, struct bpqdev, bpq_list);
bpq_free_device(bpq->axdev);
}
rtnl_unlock();
}
MODULE_AUTHOR("Joerg Reuter DL1BKE <jreuter@yaina.de>");
MODULE_DESCRIPTION("Transmit and receive AX.25 packets over Ethernet");
MODULE_LICENSE("GPL");
module_init(bpq_init_driver);
module_exit(bpq_cleanup_driver);

747
drivers/net/hamradio/hdlcdrv.c
View File

@ -1,747 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*****************************************************************************/
/*
* hdlcdrv.c -- HDLC packet radio network driver.
*
* Copyright (C) 1996-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
*
* Please note that the GPL allows you to use the driver, NOT the radio.
* In order to use the radio, you need a license from the communications
* authority of your country.
*
* The driver was derived from Donald Beckers skeleton.c
* Written 1993-94 by Donald Becker.
*
* History:
* 0.1 21.09.1996 Started
* 18.10.1996 Changed to new user space access routines
* (copy_{to,from}_user)
* 0.2 21.11.1996 various small changes
* 0.3 03.03.1997 fixed (hopefully) IP not working with ax.25 as a module
* 0.4 16.04.1997 init code/data tagged
* 0.5 30.07.1997 made HDLC buffers bigger (solves a problem with the
* soundmodem driver)
* 0.6 05.04.1998 add spinlocks
* 0.7 03.08.1999 removed some old compatibility cruft
* 0.8 12.02.2000 adapted to softnet driver interface
*/
/*****************************************************************************/
#include <linux/capability.h>
#include <linux/compat.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/net.h>
#include <linux/in.h>
#include <linux/if.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/skbuff.h>
#include <linux/hdlcdrv.h>
#include <linux/random.h>
#include <net/ax25.h>
#include <linux/uaccess.h>
#include <linux/crc-ccitt.h>
/* --------------------------------------------------------------------- */
#define KISS_VERBOSE
/* --------------------------------------------------------------------- */
#define PARAM_TXDELAY 1
#define PARAM_PERSIST 2
#define PARAM_SLOTTIME 3
#define PARAM_TXTAIL 4
#define PARAM_FULLDUP 5
#define PARAM_HARDWARE 6
#define PARAM_RETURN 255
/* --------------------------------------------------------------------- */
/*
* the CRC routines are stolen from WAMPES
* by Dieter Deyke
*/
/*---------------------------------------------------------------------------*/
static inline void append_crc_ccitt(unsigned char *buffer, int len)
{
unsigned int crc = crc_ccitt(0xffff, buffer, len) ^ 0xffff;
buffer += len;
*buffer++ = crc;
*buffer++ = crc >> 8;
}
/*---------------------------------------------------------------------------*/
static inline int check_crc_ccitt(const unsigned char *buf, int cnt)
{
return (crc_ccitt(0xffff, buf, cnt) & 0xffff) == 0xf0b8;
}
/*---------------------------------------------------------------------------*/
#if 0
static int calc_crc_ccitt(const unsigned char *buf, int cnt)
{
unsigned int crc = 0xffff;
for (; cnt > 0; cnt--)
crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buf++) & 0xff];
crc ^= 0xffff;
return crc & 0xffff;
}
#endif
/* ---------------------------------------------------------------------- */
#define tenms_to_2flags(s,tenms) ((tenms * s->par.bitrate) / 100 / 16)
/* ---------------------------------------------------------------------- */
/*
* The HDLC routines
*/
static int hdlc_rx_add_bytes(struct hdlcdrv_state *s, unsigned int bits,
int num)
{
int added = 0;
while (s->hdlcrx.rx_state && num >= 8) {
if (s->hdlcrx.len >= sizeof(s->hdlcrx.buffer)) {
s->hdlcrx.rx_state = 0;
return 0;
}
*s->hdlcrx.bp++ = bits >> (32-num);
s->hdlcrx.len++;
num -= 8;
added += 8;
}
return added;
}
static void hdlc_rx_flag(struct net_device *dev, struct hdlcdrv_state *s)
{
struct sk_buff *skb;
int pkt_len;
unsigned char *cp;
if (s->hdlcrx.len < 4)
return;
if (!check_crc_ccitt(s->hdlcrx.buffer, s->hdlcrx.len))
return;
pkt_len = s->hdlcrx.len - 2 + 1; /* KISS kludge */
if (!(skb = dev_alloc_skb(pkt_len))) {
printk("%s: memory squeeze, dropping packet\n", dev->name);
dev->stats.rx_dropped++;
return;
}
cp = skb_put(skb, pkt_len);
*cp++ = 0; /* KISS kludge */
memcpy(cp, s->hdlcrx.buffer, pkt_len - 1);
skb->protocol = ax25_type_trans(skb, dev);
netif_rx(skb);
dev->stats.rx_packets++;
}
void hdlcdrv_receiver(struct net_device *dev, struct hdlcdrv_state *s)
{
int i;
unsigned int mask1, mask2, mask3, mask4, mask5, mask6, word;
if (!s || s->magic != HDLCDRV_MAGIC)
return;
if (test_and_set_bit(0, &s->hdlcrx.in_hdlc_rx))
return;
while (!hdlcdrv_hbuf_empty(&s->hdlcrx.hbuf)) {
word = hdlcdrv_hbuf_get(&s->hdlcrx.hbuf);
#ifdef HDLCDRV_DEBUG
hdlcdrv_add_bitbuffer_word(&s->bitbuf_hdlc, word);
#endif /* HDLCDRV_DEBUG */
s->hdlcrx.bitstream >>= 16;
s->hdlcrx.bitstream |= word << 16;
s->hdlcrx.bitbuf >>= 16;
s->hdlcrx.bitbuf |= word << 16;
s->hdlcrx.numbits += 16;
for(i = 15, mask1 = 0x1fc00, mask2 = 0x1fe00, mask3 = 0x0fc00,
mask4 = 0x1f800, mask5 = 0xf800, mask6 = 0xffff;
i >= 0;
i--, mask1 <<= 1, mask2 <<= 1, mask3 <<= 1, mask4 <<= 1,
mask5 <<= 1, mask6 = (mask6 << 1) | 1) {
if ((s->hdlcrx.bitstream & mask1) == mask1)
s->hdlcrx.rx_state = 0; /* abort received */
else if ((s->hdlcrx.bitstream & mask2) == mask3) {
/* flag received */
if (s->hdlcrx.rx_state) {
hdlc_rx_add_bytes(s, s->hdlcrx.bitbuf
<< (8+i),
s->hdlcrx.numbits
-8-i);
hdlc_rx_flag(dev, s);
}
s->hdlcrx.len = 0;
s->hdlcrx.bp = s->hdlcrx.buffer;
s->hdlcrx.rx_state = 1;
s->hdlcrx.numbits = i;
} else if ((s->hdlcrx.bitstream & mask4) == mask5) {
/* stuffed bit */
s->hdlcrx.numbits--;
s->hdlcrx.bitbuf = (s->hdlcrx.bitbuf & (~mask6)) |
((s->hdlcrx.bitbuf & mask6) << 1);
}
}
s->hdlcrx.numbits -= hdlc_rx_add_bytes(s, s->hdlcrx.bitbuf,
s->hdlcrx.numbits);
}
clear_bit(0, &s->hdlcrx.in_hdlc_rx);
}
/* ---------------------------------------------------------------------- */
static inline void do_kiss_params(struct hdlcdrv_state *s,
unsigned char *data, unsigned long len)
{
#ifdef KISS_VERBOSE
#define PKP(a,b) printk(KERN_INFO "hdlcdrv.c: channel params: " a "\n", b)
#else /* KISS_VERBOSE */
#define PKP(a,b)
#endif /* KISS_VERBOSE */
if (len < 2)
return;
switch(data[0]) {
case PARAM_TXDELAY:
s->ch_params.tx_delay = data[1];
PKP("TX delay = %ums", 10 * s->ch_params.tx_delay);
break;
case PARAM_PERSIST:
s->ch_params.ppersist = data[1];
PKP("p persistence = %u", s->ch_params.ppersist);
break;
case PARAM_SLOTTIME:
s->ch_params.slottime = data[1];
PKP("slot time = %ums", s->ch_params.slottime);
break;
case PARAM_TXTAIL:
s->ch_params.tx_tail = data[1];
PKP("TX tail = %ums", s->ch_params.tx_tail);
break;
case PARAM_FULLDUP:
s->ch_params.fulldup = !!data[1];
PKP("%s duplex", s->ch_params.fulldup ? "full" : "half");
break;
default:
break;
}
#undef PKP
}
/* ---------------------------------------------------------------------- */
void hdlcdrv_transmitter(struct net_device *dev, struct hdlcdrv_state *s)
{
unsigned int mask1, mask2, mask3;
int i;
struct sk_buff *skb;
int pkt_len;
if (!s || s->magic != HDLCDRV_MAGIC)
return;
if (test_and_set_bit(0, &s->hdlctx.in_hdlc_tx))
return;
for (;;) {
if (s->hdlctx.numbits >= 16) {
if (hdlcdrv_hbuf_full(&s->hdlctx.hbuf)) {
clear_bit(0, &s->hdlctx.in_hdlc_tx);
return;
}
hdlcdrv_hbuf_put(&s->hdlctx.hbuf, s->hdlctx.bitbuf);
s->hdlctx.bitbuf >>= 16;
s->hdlctx.numbits -= 16;
}
switch (s->hdlctx.tx_state) {
default:
clear_bit(0, &s->hdlctx.in_hdlc_tx);
return;
case 0:
case 1:
if (s->hdlctx.numflags) {
s->hdlctx.numflags--;
s->hdlctx.bitbuf |=
0x7e7e << s->hdlctx.numbits;
s->hdlctx.numbits += 16;
break;
}
if (s->hdlctx.tx_state == 1) {
clear_bit(0, &s->hdlctx.in_hdlc_tx);
return;
}
if (!(skb = s->skb)) {
int flgs = tenms_to_2flags(s, s->ch_params.tx_tail);
if (flgs < 2)
flgs = 2;
s->hdlctx.tx_state = 1;
s->hdlctx.numflags = flgs;
break;
}
s->skb = NULL;
netif_wake_queue(dev);
pkt_len = skb->len-1; /* strip KISS byte */
if (pkt_len >= HDLCDRV_MAXFLEN || pkt_len < 2) {
s->hdlctx.tx_state = 0;
s->hdlctx.numflags = 1;
dev_kfree_skb_irq(skb);
break;
}
skb_copy_from_linear_data_offset(skb, 1,
s->hdlctx.buffer,
pkt_len);
dev_kfree_skb_irq(skb);
s->hdlctx.bp = s->hdlctx.buffer;
append_crc_ccitt(s->hdlctx.buffer, pkt_len);
s->hdlctx.len = pkt_len+2; /* the appended CRC */
s->hdlctx.tx_state = 2;
s->hdlctx.bitstream = 0;
dev->stats.tx_packets++;
break;
case 2:
if (!s->hdlctx.len) {
s->hdlctx.tx_state = 0;
s->hdlctx.numflags = 1;
break;
}
s->hdlctx.len--;
s->hdlctx.bitbuf |= *s->hdlctx.bp <<
s->hdlctx.numbits;
s->hdlctx.bitstream >>= 8;
s->hdlctx.bitstream |= (*s->hdlctx.bp++) << 16;
mask1 = 0x1f000;
mask2 = 0x10000;
mask3 = 0xffffffff >> (31-s->hdlctx.numbits);
s->hdlctx.numbits += 8;
for(i = 0; i < 8; i++, mask1 <<= 1, mask2 <<= 1,
mask3 = (mask3 << 1) | 1) {
if ((s->hdlctx.bitstream & mask1) != mask1)
continue;
s->hdlctx.bitstream &= ~mask2;
s->hdlctx.bitbuf =
(s->hdlctx.bitbuf & mask3) |
((s->hdlctx.bitbuf &
(~mask3)) << 1);
s->hdlctx.numbits++;
mask3 = (mask3 << 1) | 1;
}
break;
}
}
}
/* ---------------------------------------------------------------------- */
static void start_tx(struct net_device *dev, struct hdlcdrv_state *s)
{
s->hdlctx.tx_state = 0;
s->hdlctx.numflags = tenms_to_2flags(s, s->ch_params.tx_delay);
s->hdlctx.bitbuf = s->hdlctx.bitstream = s->hdlctx.numbits = 0;
hdlcdrv_transmitter(dev, s);
s->hdlctx.ptt = 1;
s->ptt_keyed++;
}
/* ---------------------------------------------------------------------- */
void hdlcdrv_arbitrate(struct net_device *dev, struct hdlcdrv_state *s)
{
if (!s || s->magic != HDLCDRV_MAGIC || s->hdlctx.ptt || !s->skb)
return;
if (s->ch_params.fulldup) {
start_tx(dev, s);
return;
}
if (s->hdlcrx.dcd) {
s->hdlctx.slotcnt = s->ch_params.slottime;
return;
}
if ((--s->hdlctx.slotcnt) > 0)
return;
s->hdlctx.slotcnt = s->ch_params.slottime;
if (get_random_u8() > s->ch_params.ppersist)
return;
start_tx(dev, s);
}
/* --------------------------------------------------------------------- */
/*
* ===================== network driver interface =========================
*/
static netdev_tx_t hdlcdrv_send_packet(struct sk_buff *skb,
struct net_device *dev)
{
struct hdlcdrv_state *sm = netdev_priv(dev);
if (skb->protocol == htons(ETH_P_IP))
return ax25_ip_xmit(skb);
if (skb->data[0] != 0) {
do_kiss_params(sm, skb->data, skb->len);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
if (sm->skb) {
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
netif_stop_queue(dev);
sm->skb = skb;
return NETDEV_TX_OK;
}
/* --------------------------------------------------------------------- */
static int hdlcdrv_set_mac_address(struct net_device *dev, void *addr)
{
struct sockaddr *sa = (struct sockaddr *)addr;
/* addr is an AX.25 shifted ASCII mac address */
dev_addr_set(dev, sa->sa_data);
return 0;
}
/* --------------------------------------------------------------------- */
/*
* Open/initialize the board. This is called (in the current kernel)
* sometime after booting when the 'ifconfig' program is run.
*
* This routine should set everything up anew at each open, even
* registers that "should" only need to be set once at boot, so that
* there is non-reboot way to recover if something goes wrong.
*/
static int hdlcdrv_open(struct net_device *dev)
{
struct hdlcdrv_state *s = netdev_priv(dev);
int i;
if (!s->ops || !s->ops->open)
return -ENODEV;
/*
* initialise some variables
*/
s->opened = 1;
s->hdlcrx.hbuf.rd = s->hdlcrx.hbuf.wr = 0;
s->hdlcrx.in_hdlc_rx = 0;
s->hdlcrx.rx_state = 0;
s->hdlctx.hbuf.rd = s->hdlctx.hbuf.wr = 0;
s->hdlctx.in_hdlc_tx = 0;
s->hdlctx.tx_state = 1;
s->hdlctx.numflags = 0;
s->hdlctx.bitstream = s->hdlctx.bitbuf = s->hdlctx.numbits = 0;
s->hdlctx.ptt = 0;
s->hdlctx.slotcnt = s->ch_params.slottime;
s->hdlctx.calibrate = 0;
i = s->ops->open(dev);
if (i)
return i;
netif_start_queue(dev);
return 0;
}
/* --------------------------------------------------------------------- */
/*
* The inverse routine to hdlcdrv_open().
*/
static int hdlcdrv_close(struct net_device *dev)
{
struct hdlcdrv_state *s = netdev_priv(dev);
int i = 0;
netif_stop_queue(dev);
if (s->ops && s->ops->close)
i = s->ops->close(dev);
dev_kfree_skb(s->skb);
s->skb = NULL;
s->opened = 0;
return i;
}
/* --------------------------------------------------------------------- */
static int hdlcdrv_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
void __user *data, int cmd)
{
struct hdlcdrv_state *s = netdev_priv(dev);
struct hdlcdrv_ioctl bi;
if (cmd != SIOCDEVPRIVATE)
return -ENOIOCTLCMD;
if (in_compat_syscall()) /* to be implemented */
return -ENOIOCTLCMD;
if (copy_from_user(&bi, data, sizeof(bi)))
return -EFAULT;
switch (bi.cmd) {
default:
if (s->ops && s->ops->ioctl)
return s->ops->ioctl(dev, data, &bi, cmd);
return -ENOIOCTLCMD;
case HDLCDRVCTL_GETCHANNELPAR:
bi.data.cp.tx_delay = s->ch_params.tx_delay;
bi.data.cp.tx_tail = s->ch_params.tx_tail;
bi.data.cp.slottime = s->ch_params.slottime;
bi.data.cp.ppersist = s->ch_params.ppersist;
bi.data.cp.fulldup = s->ch_params.fulldup;
break;
case HDLCDRVCTL_SETCHANNELPAR:
if (!capable(CAP_NET_ADMIN))
return -EACCES;
s->ch_params.tx_delay = bi.data.cp.tx_delay;
s->ch_params.tx_tail = bi.data.cp.tx_tail;
s->ch_params.slottime = bi.data.cp.slottime;
s->ch_params.ppersist = bi.data.cp.ppersist;
s->ch_params.fulldup = bi.data.cp.fulldup;
s->hdlctx.slotcnt = 1;
return 0;
case HDLCDRVCTL_GETMODEMPAR:
bi.data.mp.iobase = dev->base_addr;
bi.data.mp.irq = dev->irq;
bi.data.mp.dma = dev->dma;
bi.data.mp.dma2 = s->ptt_out.dma2;
bi.data.mp.seriobase = s->ptt_out.seriobase;
bi.data.mp.pariobase = s->ptt_out.pariobase;
bi.data.mp.midiiobase = s->ptt_out.midiiobase;
break;
case HDLCDRVCTL_SETMODEMPAR:
if ((!capable(CAP_SYS_RAWIO)) || netif_running(dev))
return -EACCES;
dev->base_addr = bi.data.mp.iobase;
dev->irq = bi.data.mp.irq;
dev->dma = bi.data.mp.dma;
s->ptt_out.dma2 = bi.data.mp.dma2;
s->ptt_out.seriobase = bi.data.mp.seriobase;
s->ptt_out.pariobase = bi.data.mp.pariobase;
s->ptt_out.midiiobase = bi.data.mp.midiiobase;
return 0;
case HDLCDRVCTL_GETSTAT:
bi.data.cs.ptt = hdlcdrv_ptt(s);
bi.data.cs.dcd = s->hdlcrx.dcd;
bi.data.cs.ptt_keyed = s->ptt_keyed;
bi.data.cs.tx_packets = dev->stats.tx_packets;
bi.data.cs.tx_errors = dev->stats.tx_errors;
bi.data.cs.rx_packets = dev->stats.rx_packets;
bi.data.cs.rx_errors = dev->stats.rx_errors;
break;
case HDLCDRVCTL_OLDGETSTAT:
bi.data.ocs.ptt = hdlcdrv_ptt(s);
bi.data.ocs.dcd = s->hdlcrx.dcd;
bi.data.ocs.ptt_keyed = s->ptt_keyed;
break;
case HDLCDRVCTL_CALIBRATE:
if(!capable(CAP_SYS_RAWIO))
return -EPERM;
if (s->par.bitrate <= 0)
return -EINVAL;
if (bi.data.calibrate > INT_MAX / s->par.bitrate)
return -EINVAL;
s->hdlctx.calibrate = bi.data.calibrate * s->par.bitrate / 16;
return 0;
case HDLCDRVCTL_GETSAMPLES:
#ifndef HDLCDRV_DEBUG
return -EPERM;
#else /* HDLCDRV_DEBUG */
if (s->bitbuf_channel.rd == s->bitbuf_channel.wr)
return -EAGAIN;
bi.data.bits =
s->bitbuf_channel.buffer[s->bitbuf_channel.rd];
s->bitbuf_channel.rd = (s->bitbuf_channel.rd+1) %
sizeof(s->bitbuf_channel.buffer);
break;
#endif /* HDLCDRV_DEBUG */
case HDLCDRVCTL_GETBITS:
#ifndef HDLCDRV_DEBUG
return -EPERM;
#else /* HDLCDRV_DEBUG */
if (s->bitbuf_hdlc.rd == s->bitbuf_hdlc.wr)
return -EAGAIN;
bi.data.bits =
s->bitbuf_hdlc.buffer[s->bitbuf_hdlc.rd];
s->bitbuf_hdlc.rd = (s->bitbuf_hdlc.rd+1) %
sizeof(s->bitbuf_hdlc.buffer);
break;
#endif /* HDLCDRV_DEBUG */
case HDLCDRVCTL_DRIVERNAME:
if (s->ops && s->ops->drvname) {
strscpy(bi.data.drivername, s->ops->drvname,
sizeof(bi.data.drivername));
break;
}
bi.data.drivername[0] = '\0';
break;
}
if (copy_to_user(data, &bi, sizeof(bi)))
return -EFAULT;
return 0;
}
/* --------------------------------------------------------------------- */
static const struct net_device_ops hdlcdrv_netdev = {
.ndo_open = hdlcdrv_open,
.ndo_stop = hdlcdrv_close,
.ndo_start_xmit = hdlcdrv_send_packet,
.ndo_siocdevprivate = hdlcdrv_siocdevprivate,
.ndo_set_mac_address = hdlcdrv_set_mac_address,
};
/*
* Initialize fields in hdlcdrv
*/
static void hdlcdrv_setup(struct net_device *dev)
{
static const struct hdlcdrv_channel_params dflt_ch_params = {
20, 2, 10, 40, 0
};
struct hdlcdrv_state *s = netdev_priv(dev);
/*
* initialize the hdlcdrv_state struct
*/
s->ch_params = dflt_ch_params;
s->ptt_keyed = 0;
spin_lock_init(&s->hdlcrx.hbuf.lock);
s->hdlcrx.hbuf.rd = s->hdlcrx.hbuf.wr = 0;
s->hdlcrx.in_hdlc_rx = 0;
s->hdlcrx.rx_state = 0;
spin_lock_init(&s->hdlctx.hbuf.lock);
s->hdlctx.hbuf.rd = s->hdlctx.hbuf.wr = 0;
s->hdlctx.in_hdlc_tx = 0;
s->hdlctx.tx_state = 1;
s->hdlctx.numflags = 0;
s->hdlctx.bitstream = s->hdlctx.bitbuf = s->hdlctx.numbits = 0;
s->hdlctx.ptt = 0;
s->hdlctx.slotcnt = s->ch_params.slottime;
s->hdlctx.calibrate = 0;
#ifdef HDLCDRV_DEBUG
s->bitbuf_channel.rd = s->bitbuf_channel.wr = 0;
s->bitbuf_channel.shreg = 0x80;
s->bitbuf_hdlc.rd = s->bitbuf_hdlc.wr = 0;
s->bitbuf_hdlc.shreg = 0x80;
#endif /* HDLCDRV_DEBUG */
/* Fill in the fields of the device structure */
s->skb = NULL;
dev->netdev_ops = &hdlcdrv_netdev;
dev->header_ops = &ax25_header_ops;
dev->type = ARPHRD_AX25; /* AF_AX25 device */
dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN;
dev->mtu = AX25_DEF_PACLEN; /* eth_mtu is the default */
dev->addr_len = AX25_ADDR_LEN; /* sizeof an ax.25 address */
memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
dev_addr_set(dev, (u8 *)&ax25_defaddr);
dev->tx_queue_len = 16;
}
/* --------------------------------------------------------------------- */
struct net_device *hdlcdrv_register(const struct hdlcdrv_ops *ops,
unsigned int privsize, const char *ifname,
unsigned int baseaddr, unsigned int irq,
unsigned int dma)
{
struct net_device *dev;
struct hdlcdrv_state *s;
int err;
if (privsize < sizeof(struct hdlcdrv_state))
privsize = sizeof(struct hdlcdrv_state);
dev = alloc_netdev(privsize, ifname, NET_NAME_UNKNOWN, hdlcdrv_setup);
if (!dev)
return ERR_PTR(-ENOMEM);
/*
* initialize part of the hdlcdrv_state struct
*/
s = netdev_priv(dev);
s->magic = HDLCDRV_MAGIC;
s->ops = ops;
dev->base_addr = baseaddr;
dev->irq = irq;
dev->dma = dma;
err = register_netdev(dev);
if (err < 0) {
printk(KERN_WARNING "hdlcdrv: cannot register net "
"device %s\n", dev->name);
free_netdev(dev);
dev = ERR_PTR(err);
}
return dev;
}
/* --------------------------------------------------------------------- */
void hdlcdrv_unregister(struct net_device *dev)
{
struct hdlcdrv_state *s = netdev_priv(dev);
BUG_ON(s->magic != HDLCDRV_MAGIC);
if (s->opened && s->ops->close)
s->ops->close(dev);
unregister_netdev(dev);
free_netdev(dev);
}
/* --------------------------------------------------------------------- */
EXPORT_SYMBOL(hdlcdrv_receiver);
EXPORT_SYMBOL(hdlcdrv_transmitter);
EXPORT_SYMBOL(hdlcdrv_arbitrate);
EXPORT_SYMBOL(hdlcdrv_register);
EXPORT_SYMBOL(hdlcdrv_unregister);
/* --------------------------------------------------------------------- */
MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
MODULE_DESCRIPTION("Packet Radio network interface HDLC encoder/decoder");
MODULE_LICENSE("GPL");

980
drivers/net/hamradio/mkiss.c
View File

@ -1,980 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
*
* Copyright (C) Hans Alblas PE1AYX <hans@esrac.ele.tue.nl>
* Copyright (C) 2004, 05 Ralf Baechle DL5RB <ralf@linux-mips.org>
* Copyright (C) 2004, 05 Thomas Osterried DL9SAU <thomas@x-berg.in-berlin.de>
*/
#include <linux/module.h>
#include <linux/bitops.h>
#include <linux/uaccess.h>
#include <linux/crc16.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/in.h>
#include <linux/inet.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/major.h>
#include <linux/init.h>
#include <linux/rtnetlink.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/jiffies.h>
#include <linux/refcount.h>
#include <net/ax25.h>
#define AX_MTU 236
/* some arch define END as assembly function ending, just undef it */
#undef END
/* SLIP/KISS protocol characters. */
#define END 0300 /* indicates end of frame */
#define ESC 0333 /* indicates byte stuffing */
#define ESC_END 0334 /* ESC ESC_END means END 'data' */
#define ESC_ESC 0335 /* ESC ESC_ESC means ESC 'data' */
struct mkiss {
struct tty_struct *tty; /* ptr to TTY structure */
struct net_device *dev; /* easy for intr handling */
/* These are pointers to the malloc()ed frame buffers. */
spinlock_t buflock;/* lock for rbuf and xbuf */
unsigned char *rbuff; /* receiver buffer */
int rcount; /* received chars counter */
unsigned char *xbuff; /* transmitter buffer */
unsigned char *xhead; /* pointer to next byte to XMIT */
int xleft; /* bytes left in XMIT queue */
/* Detailed SLIP statistics. */
int mtu; /* Our mtu (to spot changes!) */
int buffsize; /* Max buffers sizes */
unsigned long flags; /* Flag values/ mode etc */
/* long req'd: used by set_bit --RR */
#define AXF_INUSE 0 /* Channel in use */
#define AXF_ESCAPE 1 /* ESC received */
#define AXF_ERROR 2 /* Parity, etc. error */
#define AXF_KEEPTEST 3 /* Keepalive test flag */
#define AXF_OUTWAIT 4 /* is outpacket was flag */
int mode;
int crcmode; /* MW: for FlexNet, SMACK etc. */
int crcauto; /* CRC auto mode */
#define CRC_MODE_NONE 0
#define CRC_MODE_FLEX 1
#define CRC_MODE_SMACK 2
#define CRC_MODE_FLEX_TEST 3
#define CRC_MODE_SMACK_TEST 4
refcount_t refcnt;
struct completion dead;
};
/*---------------------------------------------------------------------------*/
static const unsigned short crc_flex_table[] = {
0x0f87, 0x1e0e, 0x2c95, 0x3d1c, 0x49a3, 0x582a, 0x6ab1, 0x7b38,
0x83cf, 0x9246, 0xa0dd, 0xb154, 0xc5eb, 0xd462, 0xe6f9, 0xf770,
0x1f06, 0x0e8f, 0x3c14, 0x2d9d, 0x5922, 0x48ab, 0x7a30, 0x6bb9,
0x934e, 0x82c7, 0xb05c, 0xa1d5, 0xd56a, 0xc4e3, 0xf678, 0xe7f1,
0x2e85, 0x3f0c, 0x0d97, 0x1c1e, 0x68a1, 0x7928, 0x4bb3, 0x5a3a,
0xa2cd, 0xb344, 0x81df, 0x9056, 0xe4e9, 0xf560, 0xc7fb, 0xd672,
0x3e04, 0x2f8d, 0x1d16, 0x0c9f, 0x7820, 0x69a9, 0x5b32, 0x4abb,
0xb24c, 0xa3c5, 0x915e, 0x80d7, 0xf468, 0xe5e1, 0xd77a, 0xc6f3,
0x4d83, 0x5c0a, 0x6e91, 0x7f18, 0x0ba7, 0x1a2e, 0x28b5, 0x393c,
0xc1cb, 0xd042, 0xe2d9, 0xf350, 0x87ef, 0x9666, 0xa4fd, 0xb574,
0x5d02, 0x4c8b, 0x7e10, 0x6f99, 0x1b26, 0x0aaf, 0x3834, 0x29bd,
0xd14a, 0xc0c3, 0xf258, 0xe3d1, 0x976e, 0x86e7, 0xb47c, 0xa5f5,
0x6c81, 0x7d08, 0x4f93, 0x5e1a, 0x2aa5, 0x3b2c, 0x09b7, 0x183e,
0xe0c9, 0xf140, 0xc3db, 0xd252, 0xa6ed, 0xb764, 0x85ff, 0x9476,
0x7c00, 0x6d89, 0x5f12, 0x4e9b, 0x3a24, 0x2bad, 0x1936, 0x08bf,
0xf048, 0xe1c1, 0xd35a, 0xc2d3, 0xb66c, 0xa7e5, 0x957e, 0x84f7,
0x8b8f, 0x9a06, 0xa89d, 0xb914, 0xcdab, 0xdc22, 0xeeb9, 0xff30,
0x07c7, 0x164e, 0x24d5, 0x355c, 0x41e3, 0x506a, 0x62f1, 0x7378,
0x9b0e, 0x8a87, 0xb81c, 0xa995, 0xdd2a, 0xcca3, 0xfe38, 0xefb1,
0x1746, 0x06cf, 0x3454, 0x25dd, 0x5162, 0x40eb, 0x7270, 0x63f9,
0xaa8d, 0xbb04, 0x899f, 0x9816, 0xeca9, 0xfd20, 0xcfbb, 0xde32,
0x26c5, 0x374c, 0x05d7, 0x145e, 0x60e1, 0x7168, 0x43f3, 0x527a,
0xba0c, 0xab85, 0x991e, 0x8897, 0xfc28, 0xeda1, 0xdf3a, 0xceb3,
0x3644, 0x27cd, 0x1556, 0x04df, 0x7060, 0x61e9, 0x5372, 0x42fb,
0xc98b, 0xd802, 0xea99, 0xfb10, 0x8faf, 0x9e26, 0xacbd, 0xbd34,
0x45c3, 0x544a, 0x66d1, 0x7758, 0x03e7, 0x126e, 0x20f5, 0x317c,
0xd90a, 0xc883, 0xfa18, 0xeb91, 0x9f2e, 0x8ea7, 0xbc3c, 0xadb5,
0x5542, 0x44cb, 0x7650, 0x67d9, 0x1366, 0x02ef, 0x3074, 0x21fd,
0xe889, 0xf900, 0xcb9b, 0xda12, 0xaead, 0xbf24, 0x8dbf, 0x9c36,
0x64c1, 0x7548, 0x47d3, 0x565a, 0x22e5, 0x336c, 0x01f7, 0x107e,
0xf808, 0xe981, 0xdb1a, 0xca93, 0xbe2c, 0xafa5, 0x9d3e, 0x8cb7,
0x7440, 0x65c9, 0x5752, 0x46db, 0x3264, 0x23ed, 0x1176, 0x00ff
};
static unsigned short calc_crc_flex(unsigned char *cp, int size)
{
unsigned short crc = 0xffff;
while (size--)
crc = (crc << 8) ^ crc_flex_table[((crc >> 8) ^ *cp++) & 0xff];
return crc;
}
static int check_crc_flex(unsigned char *cp, int size)
{
unsigned short crc = 0xffff;
if (size < 3)
return -1;
while (size--)
crc = (crc << 8) ^ crc_flex_table[((crc >> 8) ^ *cp++) & 0xff];
if ((crc & 0xffff) != 0x7070)
return -1;
return 0;
}
static int check_crc_16(unsigned char *cp, int size)
{
unsigned short crc = 0x0000;
if (size < 3)
return -1;
crc = crc16(0, cp, size);
if (crc != 0x0000)
return -1;
return 0;
}
/*
* Standard encapsulation
*/
static int kiss_esc(unsigned char *s, unsigned char *d, int len)
{
unsigned char *ptr = d;
unsigned char c;
/*
* Send an initial END character to flush out any data that may have
* accumulated in the receiver due to line noise.
*/
*ptr++ = END;
while (len-- > 0) {
switch (c = *s++) {
case END:
*ptr++ = ESC;
*ptr++ = ESC_END;
break;
case ESC:
*ptr++ = ESC;
*ptr++ = ESC_ESC;
break;
default:
*ptr++ = c;
break;
}
}
*ptr++ = END;
return ptr - d;
}
/*
* MW:
* OK its ugly, but tell me a better solution without copying the
* packet to a temporary buffer :-)
*/
static int kiss_esc_crc(unsigned char *s, unsigned char *d, unsigned short crc,
int len)
{
unsigned char *ptr = d;
unsigned char c=0;
*ptr++ = END;
while (len > 0) {
if (len > 2)
c = *s++;
else if (len > 1)
c = crc >> 8;
else
c = crc & 0xff;
len--;
switch (c) {
case END:
*ptr++ = ESC;
*ptr++ = ESC_END;
break;
case ESC:
*ptr++ = ESC;
*ptr++ = ESC_ESC;
break;
default:
*ptr++ = c;
break;
}
}
*ptr++ = END;
return ptr - d;
}
/* Send one completely decapsulated AX.25 packet to the AX.25 layer. */
static void ax_bump(struct mkiss *ax)
{
struct sk_buff *skb;
int count;
spin_lock_bh(&ax->buflock);
if (ax->rbuff[0] > 0x0f) {
if (ax->rbuff[0] & 0x80) {
if (check_crc_16(ax->rbuff, ax->rcount) < 0) {
ax->dev->stats.rx_errors++;
spin_unlock_bh(&ax->buflock);
return;
}
if (ax->crcmode != CRC_MODE_SMACK && ax->crcauto) {
printk(KERN_INFO
"mkiss: %s: Switching to crc-smack\n",
ax->dev->name);
ax->crcmode = CRC_MODE_SMACK;
}
ax->rcount -= 2;
*ax->rbuff &= ~0x80;
} else if (ax->rbuff[0] & 0x20) {
if (check_crc_flex(ax->rbuff, ax->rcount) < 0) {
ax->dev->stats.rx_errors++;
spin_unlock_bh(&ax->buflock);
return;
}
if (ax->crcmode != CRC_MODE_FLEX && ax->crcauto) {
printk(KERN_INFO
"mkiss: %s: Switching to crc-flexnet\n",
ax->dev->name);
ax->crcmode = CRC_MODE_FLEX;
}
ax->rcount -= 2;
/*
* dl9sau bugfix: the trailling two bytes flexnet crc
* will not be passed to the kernel. thus we have to
* correct the kissparm signature, because it indicates
* a crc but there's none
*/
*ax->rbuff &= ~0x20;
}
}
count = ax->rcount;
if ((skb = dev_alloc_skb(count)) == NULL) {
printk(KERN_ERR "mkiss: %s: memory squeeze, dropping packet.\n",
ax->dev->name);
ax->dev->stats.rx_dropped++;
spin_unlock_bh(&ax->buflock);
return;
}
skb_put_data(skb, ax->rbuff, count);
skb->protocol = ax25_type_trans(skb, ax->dev);
netif_rx(skb);
ax->dev->stats.rx_packets++;
ax->dev->stats.rx_bytes += count;
spin_unlock_bh(&ax->buflock);
}
static void kiss_unesc(struct mkiss *ax, unsigned char s)
{
switch (s) {
case END:
/* drop keeptest bit = VSV */
if (test_bit(AXF_KEEPTEST, &ax->flags))
clear_bit(AXF_KEEPTEST, &ax->flags);
if (!test_and_clear_bit(AXF_ERROR, &ax->flags) && (ax->rcount > 2))
ax_bump(ax);
clear_bit(AXF_ESCAPE, &ax->flags);
ax->rcount = 0;
return;
case ESC:
set_bit(AXF_ESCAPE, &ax->flags);
return;
case ESC_ESC:
if (test_and_clear_bit(AXF_ESCAPE, &ax->flags))
s = ESC;
break;
case ESC_END:
if (test_and_clear_bit(AXF_ESCAPE, &ax->flags))
s = END;
break;
}
spin_lock_bh(&ax->buflock);
if (!test_bit(AXF_ERROR, &ax->flags)) {
if (ax->rcount < ax->buffsize) {
ax->rbuff[ax->rcount++] = s;
spin_unlock_bh(&ax->buflock);
return;
}
ax->dev->stats.rx_over_errors++;
set_bit(AXF_ERROR, &ax->flags);
}
spin_unlock_bh(&ax->buflock);
}
static int ax_set_mac_address(struct net_device *dev, void *addr)
{
struct sockaddr_ax25 *sa = addr;
netif_tx_lock_bh(dev);
netif_addr_lock(dev);
__dev_addr_set(dev, &sa->sax25_call, AX25_ADDR_LEN);
netif_addr_unlock(dev);
netif_tx_unlock_bh(dev);
return 0;
}
/*---------------------------------------------------------------------------*/
static void ax_changedmtu(struct mkiss *ax)
{
struct net_device *dev = ax->dev;
unsigned char *xbuff, *rbuff, *oxbuff, *orbuff;
int len;
len = dev->mtu * 2;
/*
* allow for arrival of larger UDP packets, even if we say not to
* also fixes a bug in which SunOS sends 512-byte packets even with
* an MSS of 128
*/
if (len < 576 * 2)
len = 576 * 2;
xbuff = kmalloc(len + 4, GFP_ATOMIC);
rbuff = kmalloc(len + 4, GFP_ATOMIC);
if (xbuff == NULL || rbuff == NULL) {
printk(KERN_ERR "mkiss: %s: unable to grow ax25 buffers, "
"MTU change cancelled.\n",
ax->dev->name);
dev->mtu = ax->mtu;
kfree(xbuff);
kfree(rbuff);
return;
}
spin_lock_bh(&ax->buflock);
oxbuff = ax->xbuff;
ax->xbuff = xbuff;
orbuff = ax->rbuff;
ax->rbuff = rbuff;
if (ax->xleft) {
if (ax->xleft <= len) {
memcpy(ax->xbuff, ax->xhead, ax->xleft);
} else {
ax->xleft = 0;
dev->stats.tx_dropped++;
}
}
ax->xhead = ax->xbuff;
if (ax->rcount) {
if (ax->rcount <= len) {
memcpy(ax->rbuff, orbuff, ax->rcount);
} else {
ax->rcount = 0;
dev->stats.rx_over_errors++;
set_bit(AXF_ERROR, &ax->flags);
}
}
ax->mtu = dev->mtu + 73;
ax->buffsize = len;
spin_unlock_bh(&ax->buflock);
kfree(oxbuff);
kfree(orbuff);
}
/* Encapsulate one AX.25 packet and stuff into a TTY queue. */
static void ax_encaps(struct net_device *dev, unsigned char *icp, int len)
{
struct mkiss *ax = netdev_priv(dev);
unsigned char *p;
int actual, count;
if (ax->mtu != ax->dev->mtu + 73) /* Someone has been ifconfigging */
ax_changedmtu(ax);
if (len > ax->mtu) { /* Sigh, shouldn't occur BUT ... */
printk(KERN_ERR "mkiss: %s: truncating oversized transmit packet!\n", ax->dev->name);
dev->stats.tx_dropped++;
netif_start_queue(dev);
return;
}
p = icp;
spin_lock_bh(&ax->buflock);
if ((*p & 0x0f) != 0) {
/* Configuration Command (kissparms(1).
* Protocol spec says: never append CRC.
* This fixes a very old bug in the linux
* kiss driver. -- dl9sau */
switch (*p & 0xff) {
case 0x85:
/* command from userspace especially for us,
* not for delivery to the tnc */
if (len > 1) {
int cmd = (p[1] & 0xff);
switch(cmd) {
case 3:
ax->crcmode = CRC_MODE_SMACK;
break;
case 2:
ax->crcmode = CRC_MODE_FLEX;
break;
case 1:
ax->crcmode = CRC_MODE_NONE;
break;
case 0:
default:
ax->crcmode = CRC_MODE_SMACK_TEST;
cmd = 0;
}
ax->crcauto = (cmd ? 0 : 1);
printk(KERN_INFO "mkiss: %s: crc mode set to %d\n",
ax->dev->name, cmd);
}
spin_unlock_bh(&ax->buflock);
netif_start_queue(dev);
return;
default:
count = kiss_esc(p, ax->xbuff, len);
}
} else {
unsigned short crc;
switch (ax->crcmode) {
case CRC_MODE_SMACK_TEST:
ax->crcmode = CRC_MODE_FLEX_TEST;
printk(KERN_INFO "mkiss: %s: Trying crc-smack\n", ax->dev->name);
fallthrough;
case CRC_MODE_SMACK:
*p |= 0x80;
crc = swab16(crc16(0, p, len));
count = kiss_esc_crc(p, ax->xbuff, crc, len+2);
break;
case CRC_MODE_FLEX_TEST:
ax->crcmode = CRC_MODE_NONE;
printk(KERN_INFO "mkiss: %s: Trying crc-flexnet\n", ax->dev->name);
fallthrough;
case CRC_MODE_FLEX:
*p |= 0x20;
crc = calc_crc_flex(p, len);
count = kiss_esc_crc(p, ax->xbuff, crc, len+2);
break;
default:
count = kiss_esc(p, ax->xbuff, len);
}
}
spin_unlock_bh(&ax->buflock);
set_bit(TTY_DO_WRITE_WAKEUP, &ax->tty->flags);
actual = ax->tty->ops->write(ax->tty, ax->xbuff, count);
dev->stats.tx_packets++;
dev->stats.tx_bytes += actual;
netif_trans_update(ax->dev);
ax->xleft = count - actual;
ax->xhead = ax->xbuff + actual;
}
/* Encapsulate an AX.25 packet and kick it into a TTY queue. */
static netdev_tx_t ax_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct mkiss *ax = netdev_priv(dev);
if (skb->protocol == htons(ETH_P_IP))
return ax25_ip_xmit(skb);
if (!netif_running(dev)) {
printk(KERN_ERR "mkiss: %s: xmit call when iface is down\n", dev->name);
return NETDEV_TX_BUSY;
}
if (netif_queue_stopped(dev)) {
/*
* May be we must check transmitter timeout here ?
* 14 Oct 1994 Dmitry Gorodchanin.
*/
if (time_before(jiffies, dev_trans_start(dev) + 20 * HZ)) {
/* 20 sec timeout not reached */
return NETDEV_TX_BUSY;
}
printk(KERN_ERR "mkiss: %s: transmit timed out, %s?\n", dev->name,
(tty_chars_in_buffer(ax->tty) || ax->xleft) ?
"bad line quality" : "driver error");
ax->xleft = 0;
clear_bit(TTY_DO_WRITE_WAKEUP, &ax->tty->flags);
netif_start_queue(dev);
}
/* We were not busy, so we are now... :-) */
netif_stop_queue(dev);
ax_encaps(dev, skb->data, skb->len);
kfree_skb(skb);
return NETDEV_TX_OK;
}
static int ax_open_dev(struct net_device *dev)
{
struct mkiss *ax = netdev_priv(dev);
if (ax->tty == NULL)
return -ENODEV;
return 0;
}
/* Open the low-level part of the AX25 channel. Easy! */
static int ax_open(struct net_device *dev)
{
struct mkiss *ax = netdev_priv(dev);
unsigned long len;
if (ax->tty == NULL)
return -ENODEV;
/*
* Allocate the frame buffers:
*
* rbuff Receive buffer.
* xbuff Transmit buffer.
*/
len = dev->mtu * 2;
/*
* allow for arrival of larger UDP packets, even if we say not to
* also fixes a bug in which SunOS sends 512-byte packets even with
* an MSS of 128
*/
if (len < 576 * 2)
len = 576 * 2;
if ((ax->rbuff = kmalloc(len + 4, GFP_KERNEL)) == NULL)
goto norbuff;
if ((ax->xbuff = kmalloc(len + 4, GFP_KERNEL)) == NULL)
goto noxbuff;
ax->mtu = dev->mtu + 73;
ax->buffsize = len;
ax->rcount = 0;
ax->xleft = 0;
ax->flags &= (1 << AXF_INUSE); /* Clear ESCAPE & ERROR flags */
spin_lock_init(&ax->buflock);
return 0;
noxbuff:
kfree(ax->rbuff);
norbuff:
return -ENOMEM;
}
/* Close the low-level part of the AX25 channel. Easy! */
static int ax_close(struct net_device *dev)
{
struct mkiss *ax = netdev_priv(dev);
if (ax->tty)
clear_bit(TTY_DO_WRITE_WAKEUP, &ax->tty->flags);
netif_stop_queue(dev);
return 0;
}
static const struct net_device_ops ax_netdev_ops = {
.ndo_open = ax_open_dev,
.ndo_stop = ax_close,
.ndo_start_xmit = ax_xmit,
.ndo_set_mac_address = ax_set_mac_address,
};
static void ax_setup(struct net_device *dev)
{
/* Finish setting up the DEVICE info. */
dev->mtu = AX_MTU;
dev->hard_header_len = AX25_MAX_HEADER_LEN;
dev->addr_len = AX25_ADDR_LEN;
dev->type = ARPHRD_AX25;
dev->tx_queue_len = 10;
dev->header_ops = &ax25_header_ops;
dev->netdev_ops = &ax_netdev_ops;
memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
dev_addr_set(dev, (u8 *)&ax25_defaddr);
dev->flags = IFF_BROADCAST | IFF_MULTICAST;
}
/*
* We have a potential race on dereferencing tty->disc_data, because the tty
* layer provides no locking at all - thus one cpu could be running
* sixpack_receive_buf while another calls sixpack_close, which zeroes
* tty->disc_data and frees the memory that sixpack_receive_buf is using. The
* best way to fix this is to use a rwlock in the tty struct, but for now we
* use a single global rwlock for all ttys in ppp line discipline.
*/
static DEFINE_RWLOCK(disc_data_lock);
static struct mkiss *mkiss_get(struct tty_struct *tty)
{
struct mkiss *ax;
read_lock(&disc_data_lock);
ax = tty->disc_data;
if (ax)
refcount_inc(&ax->refcnt);
read_unlock(&disc_data_lock);
return ax;
}
static void mkiss_put(struct mkiss *ax)
{
if (refcount_dec_and_test(&ax->refcnt))
complete(&ax->dead);
}
static int crc_force = 0; /* Can be overridden with insmod */
static int mkiss_open(struct tty_struct *tty)
{
struct net_device *dev;
struct mkiss *ax;
int err;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (tty->ops->write == NULL)
return -EOPNOTSUPP;
dev = alloc_netdev(sizeof(struct mkiss), "ax%d", NET_NAME_UNKNOWN,
ax_setup);
if (!dev) {
err = -ENOMEM;
goto out;
}
ax = netdev_priv(dev);
ax->dev = dev;
spin_lock_init(&ax->buflock);
refcount_set(&ax->refcnt, 1);
init_completion(&ax->dead);
ax->tty = tty;
tty->disc_data = ax;
tty->receive_room = 65535;
tty_driver_flush_buffer(tty);
/* Restore default settings */
dev->type = ARPHRD_AX25;
/* Perform the low-level AX25 initialization. */
err = ax_open(ax->dev);
if (err)
goto out_free_netdev;
err = register_netdev(dev);
if (err)
goto out_free_buffers;
/* after register_netdev() - because else printk smashes the kernel */
switch (crc_force) {
case 3:
ax->crcmode = CRC_MODE_SMACK;
printk(KERN_INFO "mkiss: %s: crc mode smack forced.\n",
ax->dev->name);
break;
case 2:
ax->crcmode = CRC_MODE_FLEX;
printk(KERN_INFO "mkiss: %s: crc mode flexnet forced.\n",
ax->dev->name);
break;
case 1:
ax->crcmode = CRC_MODE_NONE;
printk(KERN_INFO "mkiss: %s: crc mode disabled.\n",
ax->dev->name);
break;
case 0:
default:
crc_force = 0;
printk(KERN_INFO "mkiss: %s: crc mode is auto.\n",
ax->dev->name);
ax->crcmode = CRC_MODE_SMACK_TEST;
}
ax->crcauto = (crc_force ? 0 : 1);
netif_start_queue(dev);
/* Done. We have linked the TTY line to a channel. */
return 0;
out_free_buffers:
kfree(ax->rbuff);
kfree(ax->xbuff);
out_free_netdev:
free_netdev(dev);
out:
return err;
}
static void mkiss_close(struct tty_struct *tty)
{
struct mkiss *ax;
write_lock_irq(&disc_data_lock);
ax = tty->disc_data;
tty->disc_data = NULL;
write_unlock_irq(&disc_data_lock);
if (!ax)
return;
/*
* We have now ensured that nobody can start using ap from now on, but
* we have to wait for all existing users to finish.
*/
if (!refcount_dec_and_test(&ax->refcnt))
wait_for_completion(&ax->dead);
/*
* Halt the transmit queue so that a new transmit cannot scribble
* on our buffers
*/
netif_stop_queue(ax->dev);
unregister_netdev(ax->dev);
/* Free all AX25 frame buffers after unreg. */
kfree(ax->rbuff);
kfree(ax->xbuff);
ax->tty = NULL;
free_netdev(ax->dev);
}
/* Perform I/O control on an active ax25 channel. */
static int mkiss_ioctl(struct tty_struct *tty, unsigned int cmd,
unsigned long arg)
{
struct mkiss *ax = mkiss_get(tty);
struct net_device *dev;
unsigned int tmp, err;
/* First make sure we're connected. */
if (ax == NULL)
return -ENXIO;
dev = ax->dev;
switch (cmd) {
case SIOCGIFNAME:
err = copy_to_user((void __user *) arg, ax->dev->name,
strlen(ax->dev->name) + 1) ? -EFAULT : 0;
break;
case SIOCGIFENCAP:
err = put_user(4, (int __user *) arg);
break;
case SIOCSIFENCAP:
if (get_user(tmp, (int __user *) arg)) {
err = -EFAULT;
break;
}
ax->mode = tmp;
dev->addr_len = AX25_ADDR_LEN;
dev->hard_header_len = AX25_KISS_HEADER_LEN +
AX25_MAX_HEADER_LEN + 3;
dev->type = ARPHRD_AX25;
err = 0;
break;
case SIOCSIFHWADDR: {
char addr[AX25_ADDR_LEN];
if (copy_from_user(&addr,
(void __user *) arg, AX25_ADDR_LEN)) {
err = -EFAULT;
break;
}
netif_tx_lock_bh(dev);
__dev_addr_set(dev, addr, AX25_ADDR_LEN);
netif_tx_unlock_bh(dev);
err = 0;
break;
}
default:
err = -ENOIOCTLCMD;
}
mkiss_put(ax);
return err;
}
/*
* Handle the 'receiver data ready' interrupt.
* This function is called by the 'tty_io' module in the kernel when
* a block of data has been received, which can now be decapsulated
* and sent on to the AX.25 layer for further processing.
*/
static void mkiss_receive_buf(struct tty_struct *tty, const u8 *cp,
const u8 *fp, size_t count)
{
struct mkiss *ax = mkiss_get(tty);
if (!ax)
return;
/*
* Argh! mtu change time! - costs us the packet part received
* at the change
*/
if (ax->mtu != ax->dev->mtu + 73)
ax_changedmtu(ax);
/* Read the characters out of the buffer */
while (count--) {
if (fp != NULL && *fp++) {
if (!test_and_set_bit(AXF_ERROR, &ax->flags))
ax->dev->stats.rx_errors++;
cp++;
continue;
}
kiss_unesc(ax, *cp++);
}
mkiss_put(ax);
tty_unthrottle(tty);
}
/*
* Called by the driver when there's room for more data. If we have
* more packets to send, we send them here.
*/
static void mkiss_write_wakeup(struct tty_struct *tty)
{
struct mkiss *ax = mkiss_get(tty);
int actual;
if (!ax)
return;
if (ax->xleft <= 0) {
/* Now serial buffer is almost free & we can start
* transmission of another packet
*/
clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
netif_wake_queue(ax->dev);
goto out;
}
actual = tty->ops->write(tty, ax->xhead, ax->xleft);
ax->xleft -= actual;
ax->xhead += actual;
out:
mkiss_put(ax);
}
static struct tty_ldisc_ops ax_ldisc = {
.owner = THIS_MODULE,
.num = N_AX25,
.name = "mkiss",
.open = mkiss_open,
.close = mkiss_close,
.ioctl = mkiss_ioctl,
.receive_buf = mkiss_receive_buf,
.write_wakeup = mkiss_write_wakeup
};
static const char banner[] __initconst = KERN_INFO \
"mkiss: AX.25 Multikiss, Hans Albas PE1AYX\n";
static const char msg_regfail[] __initconst = KERN_ERR \
"mkiss: can't register line discipline (err = %d)\n";
static int __init mkiss_init_driver(void)
{
int status;
printk(banner);
status = tty_register_ldisc(&ax_ldisc);
if (status != 0)
printk(msg_regfail, status);
return status;
}
static void __exit mkiss_exit_driver(void)
{
tty_unregister_ldisc(&ax_ldisc);
}
MODULE_AUTHOR("Ralf Baechle DL5RB <ralf@linux-mips.org>");
MODULE_DESCRIPTION("KISS driver for AX.25 over TTYs");
module_param(crc_force, int, 0);
MODULE_PARM_DESC(crc_force, "crc [0 = auto | 1 = none | 2 = flexnet | 3 = smack]");
MODULE_LICENSE("GPL");
MODULE_ALIAS_LDISC(N_AX25);
module_init(mkiss_init_driver);
module_exit(mkiss_exit_driver);

2179
drivers/net/hamradio/scc.c
View File

File diff suppressed because it is too large Load Diff

1191
drivers/net/hamradio/yam.c
View File

File diff suppressed because it is too large Load Diff

246
drivers/net/hamradio/z8530.h
View File

@ -1,246 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/* 8530 Serial Communications Controller Register definitions */
#define FLAG 0x7e
/* Write Register 0 */
#define R0 0 /* Register selects */
#define R1 1
#define R2 2
#define R3 3
#define R4 4
#define R5 5
#define R6 6
#define R7 7
#define R8 8
#define R9 9
#define R10 10
#define R11 11
#define R12 12
#define R13 13
#define R14 14
#define R15 15
#define NULLCODE 0 /* Null Code */
#define POINT_HIGH 0x8 /* Select upper half of registers */
#define RES_EXT_INT 0x10 /* Reset Ext. Status Interrupts */
#define SEND_ABORT 0x18 /* HDLC Abort */
#define RES_RxINT_FC 0x20 /* Reset RxINT on First Character */
#define RES_Tx_P 0x28 /* Reset TxINT Pending */
#define ERR_RES 0x30 /* Error Reset */
#define RES_H_IUS 0x38 /* Reset highest IUS */
#define RES_Rx_CRC 0x40 /* Reset Rx CRC Checker */
#define RES_Tx_CRC 0x80 /* Reset Tx CRC Checker */
#define RES_EOM_L 0xC0 /* Reset EOM latch */
/* Write Register 1 */
#define EXT_INT_ENAB 0x1 /* Ext Int Enable */
#define TxINT_ENAB 0x2 /* Tx Int Enable */
#define PAR_SPEC 0x4 /* Parity is special condition */
#define RxINT_DISAB 0 /* Rx Int Disable */
#define RxINT_FCERR 0x8 /* Rx Int on First Character Only or Error */
#define INT_ALL_Rx 0x10 /* Int on all Rx Characters or error */
#define INT_ERR_Rx 0x18 /* Int on error only */
#define WT_RDY_RT 0x20 /* Wait/Ready on R/T */
#define WT_FN_RDYFN 0x40 /* Wait/FN/Ready FN */
#define WT_RDY_ENAB 0x80 /* Wait/Ready Enable */
/* Write Register #2 (Interrupt Vector) */
/* Write Register 3 */
#define RxENABLE 0x1 /* Rx Enable */
#define SYNC_L_INH 0x2 /* Sync Character Load Inhibit */
#define ADD_SM 0x4 /* Address Search Mode (SDLC) */
#define RxCRC_ENAB 0x8 /* Rx CRC Enable */
#define ENT_HM 0x10 /* Enter Hunt Mode */
#define AUTO_ENAB 0x20 /* Auto Enables */
#define Rx5 0x0 /* Rx 5 Bits/Character */
#define Rx7 0x40 /* Rx 7 Bits/Character */
#define Rx6 0x80 /* Rx 6 Bits/Character */
#define Rx8 0xc0 /* Rx 8 Bits/Character */
/* Write Register 4 */
#define PAR_ENA 0x1 /* Parity Enable */
#define PAR_EVEN 0x2 /* Parity Even/Odd* */
#define SYNC_ENAB 0 /* Sync Modes Enable */
#define SB1 0x4 /* 1 stop bit/char */
#define SB15 0x8 /* 1.5 stop bits/char */
#define SB2 0xc /* 2 stop bits/char */
#define MONSYNC 0 /* 8 Bit Sync character */
#define BISYNC 0x10 /* 16 bit sync character */
#define SDLC 0x20 /* SDLC Mode (01111110 Sync Flag) */
#define EXTSYNC 0x30 /* External Sync Mode */
#define X1CLK 0x0 /* x1 clock mode */
#define X16CLK 0x40 /* x16 clock mode */
#define X32CLK 0x80 /* x32 clock mode */
#define X64CLK 0xC0 /* x64 clock mode */
/* Write Register 5 */
#define TxCRC_ENAB 0x1 /* Tx CRC Enable */
#define RTS 0x2 /* RTS */
#define SDLC_CRC 0x4 /* SDLC/CRC-16 */
#define TxENAB 0x8 /* Tx Enable */
#define SND_BRK 0x10 /* Send Break */
#define Tx5 0x0 /* Tx 5 bits (or less)/character */
#define Tx7 0x20 /* Tx 7 bits/character */
#define Tx6 0x40 /* Tx 6 bits/character */
#define Tx8 0x60 /* Tx 8 bits/character */
#define DTR 0x80 /* DTR */
/* Write Register 6 (Sync bits 0-7/SDLC Address Field) */
/* Write Register 7 (Sync bits 8-15/SDLC 01111110) */
/* Write Register 8 (transmit buffer) */
/* Write Register 9 (Master interrupt control) */
#define VIS 1 /* Vector Includes Status */
#define NV 2 /* No Vector */
#define DLC 4 /* Disable Lower Chain */
#define MIE 8 /* Master Interrupt Enable */
#define STATHI 0x10 /* Status high */
#define NORESET 0 /* No reset on write to R9 */
#define CHRB 0x40 /* Reset channel B */
#define CHRA 0x80 /* Reset channel A */
#define FHWRES 0xc0 /* Force hardware reset */
/* Write Register 10 (misc control bits) */
#define BIT6 1 /* 6 bit/8bit sync */
#define LOOPMODE 2 /* SDLC Loop mode */
#define ABUNDER 4 /* Abort/flag on SDLC xmit underrun */
#define MARKIDLE 8 /* Mark/flag on idle */
#define GAOP 0x10 /* Go active on poll */
#define NRZ 0 /* NRZ mode */
#define NRZI 0x20 /* NRZI mode */
#define FM1 0x40 /* FM1 (transition = 1) */
#define FM0 0x60 /* FM0 (transition = 0) */
#define CRCPS 0x80 /* CRC Preset I/O */
/* Write Register 11 (Clock Mode control) */
#define TRxCXT 0 /* TRxC = Xtal output */
#define TRxCTC 1 /* TRxC = Transmit clock */
#define TRxCBR 2 /* TRxC = BR Generator Output */
#define TRxCDP 3 /* TRxC = DPLL output */
#define TRxCOI 4 /* TRxC O/I */
#define TCRTxCP 0 /* Transmit clock = RTxC pin */
#define TCTRxCP 8 /* Transmit clock = TRxC pin */
#define TCBR 0x10 /* Transmit clock = BR Generator output */
#define TCDPLL 0x18 /* Transmit clock = DPLL output */
#define RCRTxCP 0 /* Receive clock = RTxC pin */
#define RCTRxCP 0x20 /* Receive clock = TRxC pin */
#define RCBR 0x40 /* Receive clock = BR Generator output */
#define RCDPLL 0x60 /* Receive clock = DPLL output */
#define RTxCX 0x80 /* RTxC Xtal/No Xtal */
/* Write Register 12 (lower byte of baud rate generator time constant) */
/* Write Register 13 (upper byte of baud rate generator time constant) */
/* Write Register 14 (Misc control bits) */
#define BRENABL 1 /* Baud rate generator enable */
#define BRSRC 2 /* Baud rate generator source */
#define DTRREQ 4 /* DTR/Request function */
#define AUTOECHO 8 /* Auto Echo */
#define LOOPBAK 0x10 /* Local loopback */
#define SEARCH 0x20 /* Enter search mode */
#define RMC 0x40 /* Reset missing clock */
#define DISDPLL 0x60 /* Disable DPLL */
#define SSBR 0x80 /* Set DPLL source = BR generator */
#define SSRTxC 0xa0 /* Set DPLL source = RTxC */
#define SFMM 0xc0 /* Set FM mode */
#define SNRZI 0xe0 /* Set NRZI mode */
/* Write Register 15 (external/status interrupt control) */
#define ZCIE 2 /* Zero count IE */
#define DCDIE 8 /* DCD IE */
#define SYNCIE 0x10 /* Sync/hunt IE */
#define CTSIE 0x20 /* CTS IE */
#define TxUIE 0x40 /* Tx Underrun/EOM IE */
#define BRKIE 0x80 /* Break/Abort IE */
/* Read Register 0 */
#define Rx_CH_AV 0x1 /* Rx Character Available */
#define ZCOUNT 0x2 /* Zero count */
#define Tx_BUF_EMP 0x4 /* Tx Buffer empty */
#define DCD 0x8 /* DCD */
#define SYNC_HUNT 0x10 /* Sync/hunt */
#define CTS 0x20 /* CTS */
#define TxEOM 0x40 /* Tx underrun */
#define BRK_ABRT 0x80 /* Break/Abort */
/* Read Register 1 */
#define ALL_SNT 0x1 /* All sent */
/* Residue Data for 8 Rx bits/char programmed */
#define RES3 0x8 /* 0/3 */
#define RES4 0x4 /* 0/4 */
#define RES5 0xc /* 0/5 */
#define RES6 0x2 /* 0/6 */
#define RES7 0xa /* 0/7 */
#define RES8 0x6 /* 0/8 */
#define RES18 0xe /* 1/8 */
#define RES28 0x0 /* 2/8 */
/* Special Rx Condition Interrupts */
#define PAR_ERR 0x10 /* Parity error */
#define Rx_OVR 0x20 /* Rx Overrun Error */
#define CRC_ERR 0x40 /* CRC/Framing Error */
#define END_FR 0x80 /* End of Frame (SDLC) */
/* Read Register 2 (channel b only) - Interrupt vector */
/* Read Register 3 (interrupt pending register) ch a only */
#define CHBEXT 0x1 /* Channel B Ext/Stat IP */
#define CHBTxIP 0x2 /* Channel B Tx IP */
#define CHBRxIP 0x4 /* Channel B Rx IP */
#define CHAEXT 0x8 /* Channel A Ext/Stat IP */
#define CHATxIP 0x10 /* Channel A Tx IP */
#define CHARxIP 0x20 /* Channel A Rx IP */
/* Read Register 8 (receive data register) */
/* Read Register 10 (misc status bits) */
#define ONLOOP 2 /* On loop */
#define LOOPSEND 0x10 /* Loop sending */
#define CLK2MIS 0x40 /* Two clocks missing */
#define CLK1MIS 0x80 /* One clock missing */
/* Read Register 12 (lower byte of baud rate generator constant) */
/* Read Register 13 (upper byte of baud rate generator constant) */
/* Read Register 15 (value of WR 15) */
/* Z85C30/Z85230 Enhanced SCC register definitions */
/* Write Register 7' (SDLC/HDLC Programmable Enhancements) */
#define AUTOTXF 0x01 /* Auto Tx Flag */
#define AUTOEOM 0x02 /* Auto EOM Latch Reset */
#define AUTORTS 0x04 /* Auto RTS */
#define TXDNRZI 0x08 /* TxD Pulled High in SDLC NRZI mode */
#define RXFIFOH 0x08 /* Z85230: Int on RX FIFO half full */
#define FASTDTR 0x10 /* Fast DTR/REQ Mode */
#define CRCCBCR 0x20 /* CRC Check Bytes Completely Received */
#define TXFIFOE 0x20 /* Z85230: Int on TX FIFO completely empty */
#define EXTRDEN 0x40 /* Extended Read Enabled */
/* Write Register 15 (external/status interrupt control) */
#define SHDLCE 1 /* SDLC/HDLC Enhancements Enable */
#define FIFOE 4 /* FIFO Enable */
/* Read Register 6 (frame status FIFO) */
#define BCLSB 0xff /* LSB of 14 bits count */
/* Read Register 7 (frame status FIFO) */
#define BCMSB 0x3f /* MSB of 14 bits count */
#define FDA 0x40 /* FIFO Data Available Status */
#define FOS 0x80 /* FIFO Overflow Status */

276
include/linux/hdlcdrv.h
View File

@ -1,276 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* hdlcdrv.h -- HDLC packet radio network driver.
* The Linux soundcard driver for 1200 baud and 9600 baud packet radio
* (C) 1996-1998 by Thomas Sailer, HB9JNX/AE4WA
*/
#ifndef _HDLCDRV_H
#define _HDLCDRV_H
#include <linux/netdevice.h>
#include <linux/if.h>
#include <linux/spinlock.h>
#include <uapi/linux/hdlcdrv.h>
#define HDLCDRV_MAGIC 0x5ac6e778
#define HDLCDRV_HDLCBUFFER 32 /* should be a power of 2 for speed reasons */
#define HDLCDRV_BITBUFFER 256 /* should be a power of 2 for speed reasons */
#undef HDLCDRV_LOOPBACK /* define for HDLC debugging purposes */
#define HDLCDRV_DEBUG
/* maximum packet length, excluding CRC */
#define HDLCDRV_MAXFLEN 400
struct hdlcdrv_hdlcbuffer {
spinlock_t lock;
unsigned rd, wr;
unsigned short buf[HDLCDRV_HDLCBUFFER];
};
#ifdef HDLCDRV_DEBUG
struct hdlcdrv_bitbuffer {
unsigned int rd;
unsigned int wr;
unsigned int shreg;
unsigned char buffer[HDLCDRV_BITBUFFER];
};
static inline void hdlcdrv_add_bitbuffer(struct hdlcdrv_bitbuffer *buf,
unsigned int bit)
{
unsigned char new;
new = buf->shreg & 1;
buf->shreg >>= 1;
buf->shreg |= (!!bit) << 7;
if (new) {
buf->buffer[buf->wr] = buf->shreg;
buf->wr = (buf->wr+1) % sizeof(buf->buffer);
buf->shreg = 0x80;
}
}
static inline void hdlcdrv_add_bitbuffer_word(struct hdlcdrv_bitbuffer *buf,
unsigned int bits)
{
buf->buffer[buf->wr] = bits & 0xff;
buf->wr = (buf->wr+1) % sizeof(buf->buffer);
buf->buffer[buf->wr] = (bits >> 8) & 0xff;
buf->wr = (buf->wr+1) % sizeof(buf->buffer);
}
#endif /* HDLCDRV_DEBUG */
/* -------------------------------------------------------------------- */
/*
* Information that need to be kept for each driver.
*/
struct hdlcdrv_ops {
/*
* first some informations needed by the hdlcdrv routines
*/
const char *drvname;
const char *drvinfo;
/*
* the routines called by the hdlcdrv routines
*/
int (*open)(struct net_device *);
int (*close)(struct net_device *);
int (*ioctl)(struct net_device *, void __user *,
struct hdlcdrv_ioctl *, int);
};
struct hdlcdrv_state {
int magic;
int opened;
const struct hdlcdrv_ops *ops;
struct {
int bitrate;
} par;
struct hdlcdrv_pttoutput {
int dma2;
int seriobase;
int pariobase;
int midiiobase;
unsigned int flags;
} ptt_out;
struct hdlcdrv_channel_params ch_params;
struct hdlcdrv_hdlcrx {
struct hdlcdrv_hdlcbuffer hbuf;
unsigned long in_hdlc_rx;
/* 0 = sync hunt, != 0 receiving */
int rx_state;
unsigned int bitstream;
unsigned int bitbuf;
int numbits;
unsigned char dcd;
int len;
unsigned char *bp;
unsigned char buffer[HDLCDRV_MAXFLEN+2];
} hdlcrx;
struct hdlcdrv_hdlctx {
struct hdlcdrv_hdlcbuffer hbuf;
unsigned long in_hdlc_tx;
/*
* 0 = send flags
* 1 = send txtail (flags)
* 2 = send packet
*/
int tx_state;
int numflags;
unsigned int bitstream;
unsigned char ptt;
int calibrate;
int slotcnt;
unsigned int bitbuf;
int numbits;
int len;
unsigned char *bp;
unsigned char buffer[HDLCDRV_MAXFLEN+2];
} hdlctx;
#ifdef HDLCDRV_DEBUG
struct hdlcdrv_bitbuffer bitbuf_channel;
struct hdlcdrv_bitbuffer bitbuf_hdlc;
#endif /* HDLCDRV_DEBUG */
int ptt_keyed;
/* queued skb for transmission */
struct sk_buff *skb;
};
/* -------------------------------------------------------------------- */
static inline int hdlcdrv_hbuf_full(struct hdlcdrv_hdlcbuffer *hb)
{
unsigned long flags;
int ret;
spin_lock_irqsave(&hb->lock, flags);
ret = !((HDLCDRV_HDLCBUFFER - 1 + hb->rd - hb->wr) % HDLCDRV_HDLCBUFFER);
spin_unlock_irqrestore(&hb->lock, flags);
return ret;
}
/* -------------------------------------------------------------------- */
static inline int hdlcdrv_hbuf_empty(struct hdlcdrv_hdlcbuffer *hb)
{
unsigned long flags;
int ret;
spin_lock_irqsave(&hb->lock, flags);
ret = (hb->rd == hb->wr);
spin_unlock_irqrestore(&hb->lock, flags);
return ret;
}
/* -------------------------------------------------------------------- */
static inline unsigned short hdlcdrv_hbuf_get(struct hdlcdrv_hdlcbuffer *hb)
{
unsigned long flags;
unsigned short val;
unsigned newr;
spin_lock_irqsave(&hb->lock, flags);
if (hb->rd == hb->wr)
val = 0;
else {
newr = (hb->rd+1) % HDLCDRV_HDLCBUFFER;
val = hb->buf[hb->rd];
hb->rd = newr;
}
spin_unlock_irqrestore(&hb->lock, flags);
return val;
}
/* -------------------------------------------------------------------- */
static inline void hdlcdrv_hbuf_put(struct hdlcdrv_hdlcbuffer *hb,
unsigned short val)
{
unsigned newp;
unsigned long flags;
spin_lock_irqsave(&hb->lock, flags);
newp = (hb->wr+1) % HDLCDRV_HDLCBUFFER;
if (newp != hb->rd) {
hb->buf[hb->wr] = val & 0xffff;
hb->wr = newp;
}
spin_unlock_irqrestore(&hb->lock, flags);
}
/* -------------------------------------------------------------------- */
static inline void hdlcdrv_putbits(struct hdlcdrv_state *s, unsigned int bits)
{
hdlcdrv_hbuf_put(&s->hdlcrx.hbuf, bits);
}
static inline unsigned int hdlcdrv_getbits(struct hdlcdrv_state *s)
{
unsigned int ret;
if (hdlcdrv_hbuf_empty(&s->hdlctx.hbuf)) {
if (s->hdlctx.calibrate > 0)
s->hdlctx.calibrate--;
else
s->hdlctx.ptt = 0;
ret = 0;
} else
ret = hdlcdrv_hbuf_get(&s->hdlctx.hbuf);
#ifdef HDLCDRV_LOOPBACK
hdlcdrv_hbuf_put(&s->hdlcrx.hbuf, ret);
#endif /* HDLCDRV_LOOPBACK */
return ret;
}
static inline void hdlcdrv_channelbit(struct hdlcdrv_state *s, unsigned int bit)
{
#ifdef HDLCDRV_DEBUG
hdlcdrv_add_bitbuffer(&s->bitbuf_channel, bit);
#endif /* HDLCDRV_DEBUG */
}
static inline void hdlcdrv_setdcd(struct hdlcdrv_state *s, int dcd)
{
s->hdlcrx.dcd = !!dcd;
}
static inline int hdlcdrv_ptt(struct hdlcdrv_state *s)
{
return s->hdlctx.ptt || (s->hdlctx.calibrate > 0);
}
/* -------------------------------------------------------------------- */
void hdlcdrv_receiver(struct net_device *, struct hdlcdrv_state *);
void hdlcdrv_transmitter(struct net_device *, struct hdlcdrv_state *);
void hdlcdrv_arbitrate(struct net_device *, struct hdlcdrv_state *);
struct net_device *hdlcdrv_register(const struct hdlcdrv_ops *ops,
unsigned int privsize, const char *ifname,
unsigned int baseaddr, unsigned int irq,
unsigned int dma);
void hdlcdrv_unregister(struct net_device *dev);
/* -------------------------------------------------------------------- */
#endif /* _HDLCDRV_H */

5
include/linux/netdevice.h
View File

@ -162,7 +162,7 @@ static inline bool dev_xmit_complete(int rc)
#if defined(CONFIG_HYPERV_NET) #if defined(CONFIG_HYPERV_NET)
# define LL_MAX_HEADER 128 # define LL_MAX_HEADER 128
#elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) #elif defined(CONFIG_WLAN)
# if defined(CONFIG_MAC80211_MESH) # if defined(CONFIG_MAC80211_MESH)
# define LL_MAX_HEADER 128 # define LL_MAX_HEADER 128
# else # else
@ -2316,9 +2316,6 @@ struct net_device {
#if IS_ENABLED(CONFIG_ATALK) #if IS_ENABLED(CONFIG_ATALK)
void *atalk_ptr; void *atalk_ptr;
#endif #endif
#if IS_ENABLED(CONFIG_AX25)
struct ax25_dev __rcu *ax25_ptr;
#endif
#if IS_ENABLED(CONFIG_CFG80211) #if IS_ENABLED(CONFIG_CFG80211)
struct wireless_dev *ieee80211_ptr; struct wireless_dev *ieee80211_ptr;
#endif #endif

86
include/linux/scc.h
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@ -1,86 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/* $Id: scc.h,v 1.29 1997/04/02 14:56:45 jreuter Exp jreuter $ */
#ifndef _SCC_H
#define _SCC_H
#include <uapi/linux/scc.h>
enum {TX_OFF, TX_ON}; /* command for scc_key_trx() */
/* Vector masks in RR2B */
#define VECTOR_MASK 0x06
#define TXINT 0x00
#define EXINT 0x02
#define RXINT 0x04
#define SPINT 0x06
#ifdef CONFIG_SCC_DELAY
#define Inb(port) inb_p(port)
#define Outb(port, val) outb_p(val, port)
#else
#define Inb(port) inb(port)
#define Outb(port, val) outb(val, port)
#endif
/* SCC channel control structure for KISS */
struct scc_kiss {
unsigned char txdelay; /* Transmit Delay 10 ms/cnt */
unsigned char persist; /* Persistence (0-255) as a % */
unsigned char slottime; /* Delay to wait on persistence hit */
unsigned char tailtime; /* Delay after last byte written */
unsigned char fulldup; /* Full Duplex mode 0=CSMA 1=DUP 2=ALWAYS KEYED */
unsigned char waittime; /* Waittime before any transmit attempt */
unsigned int maxkeyup; /* Maximum time to transmit (seconds) */
unsigned int mintime; /* Minimal offtime after MAXKEYUP timeout (seconds) */
unsigned int idletime; /* Maximum idle time in ALWAYS KEYED mode (seconds) */
unsigned int maxdefer; /* Timer for CSMA channel busy limit */
unsigned char tx_inhibit; /* Transmit is not allowed when set */
unsigned char group; /* Group ID for AX.25 TX interlocking */
unsigned char mode; /* 'normal' or 'hwctrl' mode (unused) */
unsigned char softdcd; /* Use DPLL instead of DCD pin for carrier detect */
};
/* SCC channel structure */
struct scc_channel {
int init; /* channel exists? */
struct net_device *dev; /* link to device control structure */
struct net_device_stats dev_stat;/* device statistics */
char brand; /* manufacturer of the board */
long clock; /* used clock */
io_port ctrl; /* I/O address of CONTROL register */
io_port data; /* I/O address of DATA register */
io_port special; /* I/O address of special function port */
int irq; /* Number of Interrupt */
char option;
char enhanced; /* Enhanced SCC support */
unsigned char wreg[16]; /* Copy of last written value in WRx */
unsigned char status; /* Copy of R0 at last external interrupt */
unsigned char dcd; /* DCD status */
struct scc_kiss kiss; /* control structure for KISS params */
struct scc_stat stat; /* statistical information */
struct scc_modem modem; /* modem information */
struct sk_buff_head tx_queue; /* next tx buffer */
struct sk_buff *rx_buff; /* pointer to frame currently received */
struct sk_buff *tx_buff; /* pointer to frame currently transmitted */
/* Timer */
struct timer_list tx_t; /* tx timer for this channel */
struct timer_list tx_wdog; /* tx watchdogs */
/* Channel lock */
spinlock_t lock; /* Channel guard lock */
};
#endif /* defined(_SCC_H) */

67
include/linux/yam.h
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@ -1,67 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*****************************************************************************/
/*
* yam.h -- YAM radio modem driver.
*
* Copyright (C) 1998 Frederic Rible F1OAT (frible@teaser.fr)
* Adapted from baycom.c driver written by Thomas Sailer (sailer@ife.ee.ethz.ch)
*
* Please note that the GPL allows you to use the driver, NOT the radio.
* In order to use the radio, you need a license from the communications
* authority of your country.
*/
/*****************************************************************************/
#define SIOCYAMRESERVED (0)
#define SIOCYAMSCFG (1) /* Set configuration */
#define SIOCYAMGCFG (2) /* Get configuration */
#define SIOCYAMSMCS (3) /* Set mcs data */
#define YAM_IOBASE (1 << 0)
#define YAM_IRQ (1 << 1)
#define YAM_BITRATE (1 << 2) /* Bit rate of radio port ->57600 */
#define YAM_MODE (1 << 3) /* 0=simplex 1=duplex 2=duplex+tempo */
#define YAM_HOLDDLY (1 << 4) /* duplex tempo (sec) */
#define YAM_TXDELAY (1 << 5) /* Tx Delay (ms) */
#define YAM_TXTAIL (1 << 6) /* Tx Tail (ms) */
#define YAM_PERSIST (1 << 7) /* Persist (ms) */
#define YAM_SLOTTIME (1 << 8) /* Slottime (ms) */
#define YAM_BAUDRATE (1 << 9) /* Baud rate of rs232 port ->115200 */
#define YAM_MAXBITRATE 57600
#define YAM_MAXBAUDRATE 115200
#define YAM_MAXMODE 2
#define YAM_MAXHOLDDLY 99
#define YAM_MAXTXDELAY 999
#define YAM_MAXTXTAIL 999
#define YAM_MAXPERSIST 255
#define YAM_MAXSLOTTIME 999
#define YAM_FPGA_SIZE 5302
struct yamcfg {
unsigned int mask; /* Mask of commands */
unsigned int iobase; /* IO Base of COM port */
unsigned int irq; /* IRQ of COM port */
unsigned int bitrate; /* Bit rate of radio port */
unsigned int baudrate; /* Baud rate of the RS232 port */
unsigned int txdelay; /* TxDelay */
unsigned int txtail; /* TxTail */
unsigned int persist; /* Persistence */
unsigned int slottime; /* Slottime */
unsigned int mode; /* mode 0 (simp), 1(Dupl), 2(Dupl+delay) */
unsigned int holddly; /* PTT delay in FullDuplex 2 mode */
};
struct yamdrv_ioctl_cfg {
int cmd;
struct yamcfg cfg;
};
struct yamdrv_ioctl_mcs {
int cmd;
unsigned int bitrate;
unsigned char bits[YAM_FPGA_SIZE];
};

476
include/net/ax25.h
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@ -1,480 +1,10 @@
/* SPDX-License-Identifier: GPL-2.0 */ /* SPDX-License-Identifier: GPL-2.0 */
/*
* Declarations of AX.25 type objects.
*
* Alan Cox (GW4PTS) 10/11/93
*/
#ifndef _AX25_H #ifndef _AX25_H
#define _AX25_H #define _AX25_H
#include <linux/ax25.h> #include <linux/ax25.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/refcount.h>
#include <net/neighbour.h>
#include <net/sock.h>
#include <linux/seq_file.h>
#define AX25_T1CLAMPLO 1 #define AX25_ADDR_LEN 7
#define AX25_T1CLAMPHI (30 * HZ) #define AX25_P_IP 0xCC
#define AX25_BPQ_HEADER_LEN 16
#define AX25_KISS_HEADER_LEN 1
#define AX25_HEADER_LEN 17
#define AX25_ADDR_LEN 7
#define AX25_DIGI_HEADER_LEN (AX25_MAX_DIGIS * AX25_ADDR_LEN)
#define AX25_MAX_HEADER_LEN (AX25_HEADER_LEN + AX25_DIGI_HEADER_LEN)
/* AX.25 Protocol IDs */
#define AX25_P_ROSE 0x01
#define AX25_P_VJCOMP 0x06 /* Compressed TCP/IP packet */
/* Van Jacobsen (RFC 1144) */
#define AX25_P_VJUNCOMP 0x07 /* Uncompressed TCP/IP packet */
/* Van Jacobsen (RFC 1144) */
#define AX25_P_SEGMENT 0x08 /* Segmentation fragment */
#define AX25_P_TEXNET 0xc3 /* TEXTNET datagram protocol */
#define AX25_P_LQ 0xc4 /* Link Quality Protocol */
#define AX25_P_ATALK 0xca /* Appletalk */
#define AX25_P_ATALK_ARP 0xcb /* Appletalk ARP */
#define AX25_P_IP 0xcc /* ARPA Internet Protocol */
#define AX25_P_ARP 0xcd /* ARPA Address Resolution */
#define AX25_P_FLEXNET 0xce /* FlexNet */
#define AX25_P_NETROM 0xcf /* NET/ROM */
#define AX25_P_TEXT 0xF0 /* No layer 3 protocol impl. */
/* AX.25 Segment control values */
#define AX25_SEG_REM 0x7F
#define AX25_SEG_FIRST 0x80
#define AX25_CBIT 0x80 /* Command/Response bit */
#define AX25_EBIT 0x01 /* HDLC Address Extension bit */
#define AX25_HBIT 0x80 /* Has been repeated bit */
#define AX25_SSSID_SPARE 0x60 /* Unused bits in SSID for standard AX.25 */
#define AX25_ESSID_SPARE 0x20 /* Unused bits in SSID for extended AX.25 */
#define AX25_DAMA_FLAG 0x20 /* Well, it is *NOT* unused! (dl1bke 951121 */
#define AX25_COND_ACK_PENDING 0x01
#define AX25_COND_REJECT 0x02
#define AX25_COND_PEER_RX_BUSY 0x04
#define AX25_COND_OWN_RX_BUSY 0x08
#define AX25_COND_DAMA_MODE 0x10
#ifndef _LINUX_NETDEVICE_H
#include <linux/netdevice.h>
#endif
/* Upper sub-layer (LAPB) definitions */
/* Control field templates */
#define AX25_I 0x00 /* Information frames */
#define AX25_S 0x01 /* Supervisory frames */
#define AX25_RR 0x01 /* Receiver ready */
#define AX25_RNR 0x05 /* Receiver not ready */
#define AX25_REJ 0x09 /* Reject */
#define AX25_U 0x03 /* Unnumbered frames */
#define AX25_SABM 0x2f /* Set Asynchronous Balanced Mode */
#define AX25_SABME 0x6f /* Set Asynchronous Balanced Mode Extended */
#define AX25_DISC 0x43 /* Disconnect */
#define AX25_DM 0x0f /* Disconnected mode */
#define AX25_UA 0x63 /* Unnumbered acknowledge */
#define AX25_FRMR 0x87 /* Frame reject */
#define AX25_UI 0x03 /* Unnumbered information */
#define AX25_XID 0xaf /* Exchange information */
#define AX25_TEST 0xe3 /* Test */
#define AX25_PF 0x10 /* Poll/final bit for standard AX.25 */
#define AX25_EPF 0x01 /* Poll/final bit for extended AX.25 */
#define AX25_ILLEGAL 0x100 /* Impossible to be a real frame type */
#define AX25_POLLOFF 0
#define AX25_POLLON 1
/* AX25 L2 C-bit */
#define AX25_COMMAND 1
#define AX25_RESPONSE 2
/* Define Link State constants. */
enum {
AX25_STATE_0, /* Listening */
AX25_STATE_1, /* SABM sent */
AX25_STATE_2, /* DISC sent */
AX25_STATE_3, /* Established */
AX25_STATE_4 /* Recovery */
};
#define AX25_MODULUS 8 /* Standard AX.25 modulus */
#define AX25_EMODULUS 128 /* Extended AX.25 modulus */
enum {
AX25_PROTO_STD_SIMPLEX,
AX25_PROTO_STD_DUPLEX,
#ifdef CONFIG_AX25_DAMA_SLAVE
AX25_PROTO_DAMA_SLAVE,
#endif
__AX25_PROTO_MAX,
AX25_PROTO_MAX = __AX25_PROTO_MAX -1
};
enum {
AX25_VALUES_IPDEFMODE, /* 0=DG 1=VC */
AX25_VALUES_AXDEFMODE, /* 0=Normal 1=Extended Seq Nos */
AX25_VALUES_BACKOFF, /* 0=None 1=Linear 2=Exponential */
AX25_VALUES_CONMODE, /* Allow connected modes - 0=No 1=no "PID text" 2=all PIDs */
AX25_VALUES_WINDOW, /* Default window size for standard AX.25 */
AX25_VALUES_EWINDOW, /* Default window size for extended AX.25 */
AX25_VALUES_T1, /* Default T1 timeout value */
AX25_VALUES_T2, /* Default T2 timeout value */
AX25_VALUES_T3, /* Default T3 timeout value */
AX25_VALUES_IDLE, /* Connected mode idle timer */
AX25_VALUES_N2, /* Default N2 value */
AX25_VALUES_PACLEN, /* AX.25 MTU */
AX25_VALUES_PROTOCOL, /* Std AX.25, DAMA Slave */
#ifdef CONFIG_AX25_DAMA_SLAVE
AX25_VALUES_DS_TIMEOUT, /* DAMA Slave timeout */
#endif
AX25_MAX_VALUES /* THIS MUST REMAIN THE LAST ENTRY OF THIS LIST */
};
#define AX25_DEF_IPDEFMODE 0 /* Datagram */
#define AX25_DEF_AXDEFMODE 0 /* Normal */
#define AX25_DEF_BACKOFF 1 /* Linear backoff */
#define AX25_DEF_CONMODE 2 /* Connected mode allowed */
#define AX25_DEF_WINDOW 2 /* Window=2 */
#define AX25_DEF_EWINDOW 32 /* Module-128 Window=32 */
#define AX25_DEF_T1 10000 /* T1=10s */
#define AX25_DEF_T2 3000 /* T2=3s */
#define AX25_DEF_T3 300000 /* T3=300s */
#define AX25_DEF_N2 10 /* N2=10 */
#define AX25_DEF_IDLE 0 /* Idle=None */
#define AX25_DEF_PACLEN 256 /* Paclen=256 */
#define AX25_DEF_PROTOCOL AX25_PROTO_STD_SIMPLEX /* Standard AX.25 */
#define AX25_DEF_DS_TIMEOUT 180000 /* DAMA timeout 3 minutes */
typedef struct ax25_uid_assoc {
struct hlist_node uid_node;
refcount_t refcount;
kuid_t uid;
ax25_address call;
} ax25_uid_assoc;
#define ax25_uid_for_each(__ax25, list) \
hlist_for_each_entry(__ax25, list, uid_node)
#define ax25_uid_hold(ax25) \
refcount_inc(&((ax25)->refcount))
static inline void ax25_uid_put(ax25_uid_assoc *assoc)
{
if (refcount_dec_and_test(&assoc->refcount)) {
kfree(assoc);
}
}
typedef struct {
ax25_address calls[AX25_MAX_DIGIS];
unsigned char repeated[AX25_MAX_DIGIS];
unsigned char ndigi;
signed char lastrepeat;
} ax25_digi;
typedef struct ax25_route {
struct ax25_route *next;
ax25_address callsign;
struct net_device *dev;
ax25_digi *digipeat;
char ip_mode;
} ax25_route;
void __ax25_put_route(ax25_route *ax25_rt);
extern rwlock_t ax25_route_lock;
static inline void ax25_route_lock_use(void)
{
read_lock(&ax25_route_lock);
}
static inline void ax25_route_lock_unuse(void)
{
read_unlock(&ax25_route_lock);
}
typedef struct {
char slave; /* slave_mode? */
struct timer_list slave_timer; /* timeout timer */
unsigned short slave_timeout; /* when? */
} ax25_dama_info;
typedef struct ax25_dev {
struct list_head list;
struct net_device *dev;
netdevice_tracker dev_tracker;
struct net_device *forward;
struct ctl_table_header *sysheader;
int values[AX25_MAX_VALUES];
#ifdef CONFIG_AX25_DAMA_SLAVE
ax25_dama_info dama;
#endif
refcount_t refcount;
bool device_up;
struct rcu_head rcu;
} ax25_dev;
typedef struct ax25_cb {
struct hlist_node ax25_node;
ax25_address source_addr, dest_addr;
ax25_digi *digipeat;
ax25_dev *ax25_dev;
netdevice_tracker dev_tracker;
unsigned char iamdigi;
unsigned char state, modulus, pidincl;
unsigned short vs, vr, va;
unsigned char condition, backoff;
unsigned char n2, n2count;
struct timer_list t1timer, t2timer, t3timer, idletimer;
unsigned long t1, t2, t3, idle, rtt;
unsigned short paclen, fragno, fraglen;
struct sk_buff_head write_queue;
struct sk_buff_head reseq_queue;
struct sk_buff_head ack_queue;
struct sk_buff_head frag_queue;
unsigned char window;
struct timer_list timer, dtimer;
struct sock *sk; /* Backlink to socket */
refcount_t refcount;
} ax25_cb;
struct ax25_sock {
struct sock sk;
struct ax25_cb *cb;
};
#define ax25_sk(ptr) container_of_const(ptr, struct ax25_sock, sk)
static inline struct ax25_cb *sk_to_ax25(const struct sock *sk)
{
return ax25_sk(sk)->cb;
}
#define ax25_for_each(__ax25, list) \
hlist_for_each_entry(__ax25, list, ax25_node)
#define ax25_cb_hold(__ax25) \
refcount_inc(&((__ax25)->refcount))
static __inline__ void ax25_cb_put(ax25_cb *ax25)
{
if (refcount_dec_and_test(&ax25->refcount)) {
kfree(ax25->digipeat);
kfree(ax25);
}
}
static inline void ax25_dev_hold(ax25_dev *ax25_dev)
{
refcount_inc(&ax25_dev->refcount);
}
static inline void ax25_dev_put(ax25_dev *ax25_dev)
{
if (refcount_dec_and_test(&ax25_dev->refcount))
kfree_rcu(ax25_dev, rcu);
}
static inline __be16 ax25_type_trans(struct sk_buff *skb, struct net_device *dev)
{
skb->dev = dev;
skb_reset_mac_header(skb);
skb->pkt_type = PACKET_HOST;
return htons(ETH_P_AX25);
}
/* af_ax25.c */
extern struct hlist_head ax25_list;
extern spinlock_t ax25_list_lock;
void ax25_cb_add(ax25_cb *);
struct sock *ax25_find_listener(ax25_address *, int, struct net_device *, int);
struct sock *ax25_get_socket(ax25_address *, ax25_address *, int);
ax25_cb *ax25_find_cb(const ax25_address *, ax25_address *, ax25_digi *,
struct net_device *);
void ax25_send_to_raw(ax25_address *, struct sk_buff *, int);
void ax25_destroy_socket(ax25_cb *);
ax25_cb * __must_check ax25_create_cb(void);
void ax25_fillin_cb(ax25_cb *, ax25_dev *);
struct sock *ax25_make_new(struct sock *, struct ax25_dev *);
/* ax25_addr.c */
extern const ax25_address ax25_bcast;
extern const ax25_address ax25_defaddr;
extern const ax25_address null_ax25_address;
char *ax2asc(char *buf, const ax25_address *);
void asc2ax(ax25_address *addr, const char *callsign);
int ax25cmp(const ax25_address *, const ax25_address *);
int ax25digicmp(const ax25_digi *, const ax25_digi *);
const unsigned char *ax25_addr_parse(const unsigned char *, int,
ax25_address *, ax25_address *, ax25_digi *, int *, int *);
int ax25_addr_build(unsigned char *, const ax25_address *,
const ax25_address *, const ax25_digi *, int, int);
int ax25_addr_size(const ax25_digi *);
void ax25_digi_invert(const ax25_digi *, ax25_digi *);
/* ax25_dev.c */
extern spinlock_t ax25_dev_lock;
#if IS_ENABLED(CONFIG_AX25)
static inline ax25_dev *ax25_dev_ax25dev(const struct net_device *dev)
{
return rcu_dereference_rtnl(dev->ax25_ptr);
}
#endif
ax25_dev *ax25_addr_ax25dev(ax25_address *);
void ax25_dev_device_up(struct net_device *);
void ax25_dev_device_down(struct net_device *);
int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct *);
struct net_device *ax25_fwd_dev(struct net_device *);
void ax25_dev_free(void);
/* ax25_ds_in.c */
int ax25_ds_frame_in(ax25_cb *, struct sk_buff *, int);
/* ax25_ds_subr.c */
void ax25_ds_nr_error_recovery(ax25_cb *);
void ax25_ds_enquiry_response(ax25_cb *);
void ax25_ds_establish_data_link(ax25_cb *);
void ax25_dev_dama_off(ax25_dev *);
void ax25_dama_on(ax25_cb *);
void ax25_dama_off(ax25_cb *);
/* ax25_ds_timer.c */
void ax25_ds_setup_timer(ax25_dev *);
void ax25_ds_set_timer(ax25_dev *);
void ax25_ds_del_timer(ax25_dev *);
void ax25_ds_timer(ax25_cb *);
void ax25_ds_t1_timeout(ax25_cb *);
void ax25_ds_heartbeat_expiry(ax25_cb *);
void ax25_ds_t3timer_expiry(ax25_cb *);
void ax25_ds_idletimer_expiry(ax25_cb *);
/* ax25_iface.c */
struct ax25_protocol {
struct ax25_protocol *next;
unsigned int pid;
int (*func)(struct sk_buff *, ax25_cb *);
};
void ax25_register_pid(struct ax25_protocol *ap);
void ax25_protocol_release(unsigned int);
struct ax25_linkfail {
struct hlist_node lf_node;
void (*func)(ax25_cb *, int);
};
void ax25_linkfail_register(struct ax25_linkfail *lf);
void ax25_linkfail_release(struct ax25_linkfail *lf);
int __must_check ax25_listen_register(const ax25_address *,
struct net_device *);
void ax25_listen_release(const ax25_address *, struct net_device *);
int(*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *);
int ax25_listen_mine(const ax25_address *, struct net_device *);
void ax25_link_failed(ax25_cb *, int);
int ax25_protocol_is_registered(unsigned int);
/* ax25_in.c */
int ax25_rx_iframe(ax25_cb *, struct sk_buff *);
int ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *,
struct net_device *);
/* ax25_ip.c */
netdev_tx_t ax25_ip_xmit(struct sk_buff *skb);
extern const struct header_ops ax25_header_ops;
/* ax25_out.c */
ax25_cb *ax25_send_frame(struct sk_buff *, int, const ax25_address *,
ax25_address *, ax25_digi *, struct net_device *);
void ax25_output(ax25_cb *, int, struct sk_buff *);
void ax25_kick(ax25_cb *);
void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int);
void ax25_queue_xmit(struct sk_buff *skb, struct net_device *dev);
int ax25_check_iframes_acked(ax25_cb *, unsigned short);
/* ax25_route.c */
void ax25_rt_device_down(struct net_device *);
int ax25_rt_ioctl(unsigned int, void __user *);
extern const struct seq_operations ax25_rt_seqops;
ax25_route *ax25_get_route(ax25_address *addr, struct net_device *dev);
struct sk_buff *ax25_rt_build_path(struct sk_buff *, ax25_address *,
ax25_address *, ax25_digi *);
void ax25_rt_free(void);
/* ax25_std_in.c */
int ax25_std_frame_in(ax25_cb *, struct sk_buff *, int);
/* ax25_std_subr.c */
void ax25_std_nr_error_recovery(ax25_cb *);
void ax25_std_establish_data_link(ax25_cb *);
void ax25_std_transmit_enquiry(ax25_cb *);
void ax25_std_enquiry_response(ax25_cb *);
void ax25_std_timeout_response(ax25_cb *);
/* ax25_std_timer.c */
void ax25_std_heartbeat_expiry(ax25_cb *);
void ax25_std_t1timer_expiry(ax25_cb *);
void ax25_std_t2timer_expiry(ax25_cb *);
void ax25_std_t3timer_expiry(ax25_cb *);
void ax25_std_idletimer_expiry(ax25_cb *);
/* ax25_subr.c */
void ax25_clear_queues(ax25_cb *);
void ax25_frames_acked(ax25_cb *, unsigned short);
void ax25_requeue_frames(ax25_cb *);
int ax25_validate_nr(ax25_cb *, unsigned short);
int ax25_decode(ax25_cb *, struct sk_buff *, int *, int *, int *);
void ax25_send_control(ax25_cb *, int, int, int);
void ax25_return_dm(struct net_device *, ax25_address *, ax25_address *,
ax25_digi *);
void ax25_calculate_t1(ax25_cb *);
void ax25_calculate_rtt(ax25_cb *);
void ax25_disconnect(ax25_cb *, int);
/* ax25_timer.c */
void ax25_setup_timers(ax25_cb *);
void ax25_start_heartbeat(ax25_cb *);
void ax25_start_t1timer(ax25_cb *);
void ax25_start_t2timer(ax25_cb *);
void ax25_start_t3timer(ax25_cb *);
void ax25_start_idletimer(ax25_cb *);
void ax25_stop_heartbeat(ax25_cb *);
void ax25_stop_t1timer(ax25_cb *);
void ax25_stop_t2timer(ax25_cb *);
void ax25_stop_t3timer(ax25_cb *);
void ax25_stop_idletimer(ax25_cb *);
int ax25_t1timer_running(ax25_cb *);
unsigned long ax25_display_timer(struct timer_list *);
/* ax25_uid.c */
extern int ax25_uid_policy;
ax25_uid_assoc *ax25_findbyuid(kuid_t);
int __must_check ax25_uid_ioctl(int, struct sockaddr_ax25 *);
extern const struct seq_operations ax25_uid_seqops;
void ax25_uid_free(void);
/* sysctl_net_ax25.c */
#ifdef CONFIG_SYSCTL
int ax25_register_dev_sysctl(ax25_dev *ax25_dev);
void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev);
#else
static inline int ax25_register_dev_sysctl(ax25_dev *ax25_dev) { return 0; }
static inline void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev) {}
#endif /* CONFIG_SYSCTL */
#endif #endif

273
include/net/netrom.h
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Declarations of NET/ROM type objects.
*
* Jonathan Naylor G4KLX 9/4/95
*/
#ifndef _NETROM_H
#define _NETROM_H
#include <linux/netrom.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <net/sock.h>
#include <linux/refcount.h>
#include <linux/seq_file.h>
#include <net/ax25.h>
#define NR_NETWORK_LEN 15
#define NR_TRANSPORT_LEN 5
#define NR_PROTO_IP 0x0C
#define NR_PROTOEXT 0x00
#define NR_CONNREQ 0x01
#define NR_CONNACK 0x02
#define NR_DISCREQ 0x03
#define NR_DISCACK 0x04
#define NR_INFO 0x05
#define NR_INFOACK 0x06
#define NR_RESET 0x07
#define NR_CHOKE_FLAG 0x80
#define NR_NAK_FLAG 0x40
#define NR_MORE_FLAG 0x20
/* Define Link State constants. */
enum {
NR_STATE_0,
NR_STATE_1,
NR_STATE_2,
NR_STATE_3
};
#define NR_COND_ACK_PENDING 0x01
#define NR_COND_REJECT 0x02
#define NR_COND_PEER_RX_BUSY 0x04
#define NR_COND_OWN_RX_BUSY 0x08
#define NR_DEFAULT_T1 120000 /* Outstanding frames - 120 seconds */
#define NR_DEFAULT_T2 5000 /* Response delay - 5 seconds */
#define NR_DEFAULT_N2 3 /* Number of Retries - 3 */
#define NR_DEFAULT_T4 180000 /* Busy Delay - 180 seconds */
#define NR_DEFAULT_IDLE 0 /* No Activity Timeout - none */
#define NR_DEFAULT_WINDOW 4 /* Default Window Size - 4 */
#define NR_DEFAULT_OBS 6 /* Default Obsolescence Count - 6 */
#define NR_DEFAULT_QUAL 10 /* Default Neighbour Quality - 10 */
#define NR_DEFAULT_TTL 16 /* Default Time To Live - 16 */
#define NR_DEFAULT_ROUTING 1 /* Is routing enabled ? */
#define NR_DEFAULT_FAILS 2 /* Link fails until route fails */
#define NR_DEFAULT_RESET 0 /* Sent / accept reset cmds? */
#define NR_MODULUS 256
#define NR_MAX_WINDOW_SIZE 127 /* Maximum Window Allowable - 127 */
#define NR_MAX_PACKET_SIZE 236 /* Maximum Packet Length - 236 */
struct nr_sock {
struct sock sock;
ax25_address user_addr, source_addr, dest_addr;
struct net_device *device;
unsigned char my_index, my_id;
unsigned char your_index, your_id;
unsigned char state, condition, bpqext, window;
unsigned short vs, vr, va, vl;
unsigned char n2, n2count;
unsigned long t1, t2, t4, idle;
unsigned short fraglen;
struct timer_list t1timer;
struct timer_list t2timer;
struct timer_list t4timer;
struct timer_list idletimer;
struct sk_buff_head ack_queue;
struct sk_buff_head reseq_queue;
struct sk_buff_head frag_queue;
};
#define nr_sk(sk) ((struct nr_sock *)(sk))
struct nr_neigh {
struct hlist_node neigh_node;
ax25_address callsign;
ax25_digi *digipeat;
ax25_cb *ax25;
struct net_device *dev;
unsigned char quality;
unsigned char locked;
unsigned short count;
unsigned int number;
unsigned char failed;
refcount_t refcount;
};
struct nr_route {
unsigned char quality;
unsigned char obs_count;
struct nr_neigh *neighbour;
};
struct nr_node {
struct hlist_node node_node;
ax25_address callsign;
char mnemonic[7];
unsigned char which;
unsigned char count;
struct nr_route routes[3];
refcount_t refcount;
spinlock_t node_lock;
};
/*********************************************************************
* nr_node & nr_neigh lists, refcounting and locking
*********************************************************************/
#define nr_node_hold(__nr_node) \
refcount_inc(&((__nr_node)->refcount))
static __inline__ void nr_node_put(struct nr_node *nr_node)
{
if (refcount_dec_and_test(&nr_node->refcount)) {
kfree(nr_node);
}
}
#define nr_neigh_hold(__nr_neigh) \
refcount_inc(&((__nr_neigh)->refcount))
static __inline__ void nr_neigh_put(struct nr_neigh *nr_neigh)
{
if (refcount_dec_and_test(&nr_neigh->refcount)) {
if (nr_neigh->ax25)
ax25_cb_put(nr_neigh->ax25);
kfree(nr_neigh->digipeat);
kfree(nr_neigh);
}
}
/* nr_node_lock and nr_node_unlock also hold/put the node's refcounter.
*/
static __inline__ void nr_node_lock(struct nr_node *nr_node)
{
nr_node_hold(nr_node);
spin_lock_bh(&nr_node->node_lock);
}
static __inline__ void nr_node_unlock(struct nr_node *nr_node)
{
spin_unlock_bh(&nr_node->node_lock);
nr_node_put(nr_node);
}
#define nr_neigh_for_each(__nr_neigh, list) \
hlist_for_each_entry(__nr_neigh, list, neigh_node)
#define nr_neigh_for_each_safe(__nr_neigh, node2, list) \
hlist_for_each_entry_safe(__nr_neigh, node2, list, neigh_node)
#define nr_node_for_each(__nr_node, list) \
hlist_for_each_entry(__nr_node, list, node_node)
#define nr_node_for_each_safe(__nr_node, node2, list) \
hlist_for_each_entry_safe(__nr_node, node2, list, node_node)
/*********************************************************************/
/* af_netrom.c */
extern int sysctl_netrom_default_path_quality;
extern int sysctl_netrom_obsolescence_count_initialiser;
extern int sysctl_netrom_network_ttl_initialiser;
extern int sysctl_netrom_transport_timeout;
extern int sysctl_netrom_transport_maximum_tries;
extern int sysctl_netrom_transport_acknowledge_delay;
extern int sysctl_netrom_transport_busy_delay;
extern int sysctl_netrom_transport_requested_window_size;
extern int sysctl_netrom_transport_no_activity_timeout;
extern int sysctl_netrom_routing_control;
extern int sysctl_netrom_link_fails_count;
extern int sysctl_netrom_reset_circuit;
int nr_rx_frame(struct sk_buff *, struct net_device *);
void nr_destroy_socket(struct sock *);
/* nr_dev.c */
int nr_rx_ip(struct sk_buff *, struct net_device *);
void nr_setup(struct net_device *);
/* nr_in.c */
int nr_process_rx_frame(struct sock *, struct sk_buff *);
/* nr_loopback.c */
void nr_loopback_init(void);
void nr_loopback_clear(void);
int nr_loopback_queue(struct sk_buff *);
/* nr_out.c */
void nr_output(struct sock *, struct sk_buff *);
void nr_send_nak_frame(struct sock *);
void nr_kick(struct sock *);
void nr_transmit_buffer(struct sock *, struct sk_buff *);
void nr_establish_data_link(struct sock *);
void nr_enquiry_response(struct sock *);
void nr_check_iframes_acked(struct sock *, unsigned short);
/* nr_route.c */
void nr_rt_device_down(struct net_device *);
struct net_device *nr_dev_first(void);
struct net_device *nr_dev_get(ax25_address *);
int nr_rt_ioctl(unsigned int, void __user *);
void nr_link_failed(ax25_cb *, int);
int nr_route_frame(struct sk_buff *, ax25_cb *);
extern const struct seq_operations nr_node_seqops;
extern const struct seq_operations nr_neigh_seqops;
void nr_rt_free(void);
/* nr_subr.c */
void nr_clear_queues(struct sock *);
void nr_frames_acked(struct sock *, unsigned short);
void nr_requeue_frames(struct sock *);
int nr_validate_nr(struct sock *, unsigned short);
int nr_in_rx_window(struct sock *, unsigned short);
void nr_write_internal(struct sock *, int);
void __nr_transmit_reply(struct sk_buff *skb, int mine, unsigned char cmdflags);
/*
* This routine is called when a Connect Acknowledge with the Choke Flag
* set is needed to refuse a connection.
*/
#define nr_transmit_refusal(skb, mine) \
do { \
__nr_transmit_reply((skb), (mine), NR_CONNACK | NR_CHOKE_FLAG); \
} while (0)
/*
* This routine is called when we don't have a circuit matching an incoming
* NET/ROM packet. This is an G8PZT Xrouter extension.
*/
#define nr_transmit_reset(skb, mine) \
do { \
__nr_transmit_reply((skb), (mine), NR_RESET); \
} while (0)
void nr_disconnect(struct sock *, int);
/* nr_timer.c */
void nr_init_timers(struct sock *sk);
void nr_start_heartbeat(struct sock *);
void nr_start_t1timer(struct sock *);
void nr_start_t2timer(struct sock *);
void nr_start_t4timer(struct sock *);
void nr_start_idletimer(struct sock *);
void nr_stop_heartbeat(struct sock *);
void nr_stop_t1timer(struct sock *);
void nr_stop_t2timer(struct sock *);
void nr_stop_t4timer(struct sock *);
void nr_stop_idletimer(struct sock *);
int nr_t1timer_running(struct sock *);
/* sysctl_net_netrom.c */
int nr_register_sysctl(void);
void nr_unregister_sysctl(void);
#endif

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include/net/rose.h
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@ -1,266 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0 */ /* SPDX-License-Identifier: GPL-2.0 */
/*
* Declarations of Rose type objects.
*
* Jonathan Naylor G4KLX 25/8/96
*/
#ifndef _ROSE_H #ifndef _ROSE_H
#define _ROSE_H #define _ROSE_H
#include <linux/refcount.h> #define ROSE_ADDR_LEN 5
#include <linux/rose.h>
#include <net/ax25.h>
#include <net/sock.h>
#define ROSE_ADDR_LEN 5
#define ROSE_MIN_LEN 3
#define ROSE_CALL_REQ_ADDR_LEN_OFF 3
#define ROSE_CALL_REQ_ADDR_LEN_VAL 0xAA /* each address is 10 digits */
#define ROSE_CALL_REQ_DEST_ADDR_OFF 4
#define ROSE_CALL_REQ_SRC_ADDR_OFF 9
#define ROSE_CALL_REQ_FACILITIES_OFF 14
#define ROSE_GFI 0x10
#define ROSE_Q_BIT 0x80
#define ROSE_D_BIT 0x40
#define ROSE_M_BIT 0x10
#define ROSE_CALL_REQUEST 0x0B
#define ROSE_CALL_ACCEPTED 0x0F
#define ROSE_CLEAR_REQUEST 0x13
#define ROSE_CLEAR_CONFIRMATION 0x17
#define ROSE_DATA 0x00
#define ROSE_INTERRUPT 0x23
#define ROSE_INTERRUPT_CONFIRMATION 0x27
#define ROSE_RR 0x01
#define ROSE_RNR 0x05
#define ROSE_REJ 0x09
#define ROSE_RESET_REQUEST 0x1B
#define ROSE_RESET_CONFIRMATION 0x1F
#define ROSE_REGISTRATION_REQUEST 0xF3
#define ROSE_REGISTRATION_CONFIRMATION 0xF7
#define ROSE_RESTART_REQUEST 0xFB
#define ROSE_RESTART_CONFIRMATION 0xFF
#define ROSE_DIAGNOSTIC 0xF1
#define ROSE_ILLEGAL 0xFD
/* Define Link State constants. */
enum {
ROSE_STATE_0, /* Ready */
ROSE_STATE_1, /* Awaiting Call Accepted */
ROSE_STATE_2, /* Awaiting Clear Confirmation */
ROSE_STATE_3, /* Data Transfer */
ROSE_STATE_4, /* Awaiting Reset Confirmation */
ROSE_STATE_5 /* Deferred Call Acceptance */
};
#define ROSE_DEFAULT_T0 180000 /* Default T10 T20 value */
#define ROSE_DEFAULT_T1 200000 /* Default T11 T21 value */
#define ROSE_DEFAULT_T2 180000 /* Default T12 T22 value */
#define ROSE_DEFAULT_T3 180000 /* Default T13 T23 value */
#define ROSE_DEFAULT_HB 5000 /* Default Holdback value */
#define ROSE_DEFAULT_IDLE 0 /* No Activity Timeout - none */
#define ROSE_DEFAULT_ROUTING 1 /* Default routing flag */
#define ROSE_DEFAULT_FAIL_TIMEOUT 120000 /* Time until link considered usable */
#define ROSE_DEFAULT_MAXVC 50 /* Maximum number of VCs per neighbour */
#define ROSE_DEFAULT_WINDOW_SIZE 7 /* Default window size */
#define ROSE_MODULUS 8
#define ROSE_MAX_PACKET_SIZE 251 /* Maximum packet size */
#define ROSE_COND_ACK_PENDING 0x01
#define ROSE_COND_PEER_RX_BUSY 0x02
#define ROSE_COND_OWN_RX_BUSY 0x04
#define FAC_NATIONAL 0x00
#define FAC_CCITT 0x0F
#define FAC_NATIONAL_RAND 0x7F
#define FAC_NATIONAL_FLAGS 0x3F
#define FAC_NATIONAL_DEST_DIGI 0xE9
#define FAC_NATIONAL_SRC_DIGI 0xEB
#define FAC_NATIONAL_FAIL_CALL 0xED
#define FAC_NATIONAL_FAIL_ADD 0xEE
#define FAC_NATIONAL_DIGIS 0xEF
#define FAC_CCITT_DEST_NSAP 0xC9
#define FAC_CCITT_SRC_NSAP 0xCB
struct rose_neigh {
struct rose_neigh *next;
ax25_address callsign;
ax25_digi *digipeat;
ax25_cb *ax25;
struct net_device *dev;
unsigned short count;
refcount_t use;
unsigned int number;
char restarted;
char dce_mode;
char loopback;
struct sk_buff_head queue;
struct timer_list t0timer;
struct timer_list ftimer;
};
struct rose_node {
struct rose_node *next;
rose_address address;
unsigned short mask;
unsigned char count;
char loopback;
struct rose_neigh *neighbour[3];
};
struct rose_route {
struct rose_route *next;
unsigned int lci1, lci2;
rose_address src_addr, dest_addr;
ax25_address src_call, dest_call;
struct rose_neigh *neigh1, *neigh2;
unsigned int rand;
};
struct rose_sock {
struct sock sock;
rose_address source_addr, dest_addr;
ax25_address source_call, dest_call;
unsigned char source_ndigis, dest_ndigis;
ax25_address source_digis[ROSE_MAX_DIGIS];
ax25_address dest_digis[ROSE_MAX_DIGIS];
struct rose_neigh *neighbour;
struct net_device *device;
netdevice_tracker dev_tracker;
unsigned int lci, rand;
unsigned char state, condition, qbitincl, defer;
unsigned char cause, diagnostic;
unsigned short vs, vr, va, vl;
unsigned long t1, t2, t3, hb, idle;
#ifdef M_BIT
unsigned short fraglen;
struct sk_buff_head frag_queue;
#endif
struct sk_buff_head ack_queue;
struct rose_facilities_struct facilities;
struct timer_list timer;
struct timer_list idletimer;
};
#define rose_sk(sk) ((struct rose_sock *)(sk))
static inline void rose_neigh_hold(struct rose_neigh *rose_neigh)
{
refcount_inc(&rose_neigh->use);
}
static inline void rose_neigh_put(struct rose_neigh *rose_neigh)
{
if (refcount_dec_and_test(&rose_neigh->use)) {
if (rose_neigh->ax25)
ax25_cb_put(rose_neigh->ax25);
kfree(rose_neigh->digipeat);
kfree(rose_neigh);
}
}
/* af_rose.c */
extern ax25_address rose_callsign;
extern int sysctl_rose_restart_request_timeout;
extern int sysctl_rose_call_request_timeout;
extern int sysctl_rose_reset_request_timeout;
extern int sysctl_rose_clear_request_timeout;
extern int sysctl_rose_no_activity_timeout;
extern int sysctl_rose_ack_hold_back_timeout;
extern int sysctl_rose_routing_control;
extern int sysctl_rose_link_fail_timeout;
extern int sysctl_rose_maximum_vcs;
extern int sysctl_rose_window_size;
int rosecmp(const rose_address *, const rose_address *);
int rosecmpm(const rose_address *, const rose_address *, unsigned short);
char *rose2asc(char *buf, const rose_address *);
struct sock *rose_find_socket(unsigned int, struct rose_neigh *);
void rose_kill_by_neigh(struct rose_neigh *);
unsigned int rose_new_lci(struct rose_neigh *);
int rose_rx_call_request(struct sk_buff *, struct net_device *,
struct rose_neigh *, unsigned int);
void rose_destroy_socket(struct sock *);
/* rose_dev.c */
void rose_setup(struct net_device *);
/* rose_in.c */
int rose_process_rx_frame(struct sock *, struct sk_buff *);
/* rose_link.c */
void rose_start_ftimer(struct rose_neigh *);
void rose_stop_ftimer(struct rose_neigh *);
void rose_stop_t0timer(struct rose_neigh *);
int rose_ftimer_running(struct rose_neigh *);
void rose_link_rx_restart(struct sk_buff *, struct rose_neigh *,
unsigned short);
void rose_transmit_clear_request(struct rose_neigh *, unsigned int,
unsigned char, unsigned char);
void rose_transmit_link(struct sk_buff *, struct rose_neigh *);
/* rose_loopback.c */
void rose_loopback_init(void);
void rose_loopback_clear(void);
int rose_loopback_queue(struct sk_buff *, struct rose_neigh *);
/* rose_out.c */
void rose_kick(struct sock *);
void rose_enquiry_response(struct sock *);
/* rose_route.c */
extern struct rose_neigh *rose_loopback_neigh;
extern const struct seq_operations rose_neigh_seqops;
extern const struct seq_operations rose_node_seqops;
extern struct seq_operations rose_route_seqops;
void rose_add_loopback_neigh(void);
int __must_check rose_add_loopback_node(const rose_address *);
void rose_del_loopback_node(const rose_address *);
void rose_rt_device_down(struct net_device *);
void rose_link_device_down(struct net_device *);
struct net_device *rose_dev_first(void);
struct net_device *rose_dev_get(rose_address *);
struct rose_route *rose_route_free_lci(unsigned int, struct rose_neigh *);
struct rose_neigh *rose_get_neigh(rose_address *, unsigned char *,
unsigned char *, int);
int rose_rt_ioctl(unsigned int, void __user *);
void rose_link_failed(ax25_cb *, int);
int rose_route_frame(struct sk_buff *, ax25_cb *);
void rose_rt_free(void);
/* rose_subr.c */
void rose_clear_queues(struct sock *);
void rose_frames_acked(struct sock *, unsigned short);
void rose_requeue_frames(struct sock *);
int rose_validate_nr(struct sock *, unsigned short);
void rose_write_internal(struct sock *, int);
int rose_decode(struct sk_buff *, int *, int *, int *, int *, int *);
int rose_parse_facilities(unsigned char *, unsigned int,
struct rose_facilities_struct *);
void rose_disconnect(struct sock *, int, int, int);
/* rose_timer.c */
void rose_start_heartbeat(struct sock *);
void rose_start_t1timer(struct sock *);
void rose_start_t2timer(struct sock *);
void rose_start_t3timer(struct sock *);
void rose_start_hbtimer(struct sock *);
void rose_start_idletimer(struct sock *);
void rose_stop_heartbeat(struct sock *);
void rose_stop_timer(struct sock *);
void rose_stop_idletimer(struct sock *);
/* sysctl_net_rose.c */
void rose_register_sysctl(void);
void rose_unregister_sysctl(void);
#endif #endif

40
include/uapi/linux/baycom.h
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* The Linux BAYCOM driver for the Baycom serial 1200 baud modem
* and the parallel 9600 baud modem
* (C) 1997-1998 by Thomas Sailer, HB9JNX/AE4WA
*/
#ifndef _BAYCOM_H
#define _BAYCOM_H
/* -------------------------------------------------------------------- */
/*
* structs for the IOCTL commands
*/
struct baycom_debug_data {
unsigned long debug1;
unsigned long debug2;
long debug3;
};
struct baycom_ioctl {
int cmd;
union {
struct baycom_debug_data dbg;
} data;
};
/* -------------------------------------------------------------------- */
/*
* ioctl values change for baycom
*/
#define BAYCOMCTL_GETDEBUG 0x92
/* -------------------------------------------------------------------- */
#endif /* _BAYCOM_H */
/* --------------------------------------------------------------------- */

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include/uapi/linux/hdlcdrv.h
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* hdlcdrv.h -- HDLC packet radio network driver.
* The Linux soundcard driver for 1200 baud and 9600 baud packet radio
* (C) 1996-1998 by Thomas Sailer, HB9JNX/AE4WA
*/
#ifndef _UAPI_HDLCDRV_H
#define _UAPI_HDLCDRV_H
/* -------------------------------------------------------------------- */
/*
* structs for the IOCTL commands
*/
struct hdlcdrv_params {
int iobase;
int irq;
int dma;
int dma2;
int seriobase;
int pariobase;
int midiiobase;
};
struct hdlcdrv_channel_params {
int tx_delay; /* the transmitter keyup delay in 10ms units */
int tx_tail; /* the transmitter keyoff delay in 10ms units */
int slottime; /* the slottime in 10ms; usually 10 = 100ms */
int ppersist; /* the p-persistence 0..255 */
int fulldup; /* some driver do not support full duplex, setting */
/* this just makes them send even if DCD is on */
};
struct hdlcdrv_old_channel_state {
int ptt;
int dcd;
int ptt_keyed;
};
struct hdlcdrv_channel_state {
int ptt;
int dcd;
int ptt_keyed;
unsigned long tx_packets;
unsigned long tx_errors;
unsigned long rx_packets;
unsigned long rx_errors;
};
struct hdlcdrv_ioctl {
int cmd;
union {
struct hdlcdrv_params mp;
struct hdlcdrv_channel_params cp;
struct hdlcdrv_channel_state cs;
struct hdlcdrv_old_channel_state ocs;
unsigned int calibrate;
unsigned char bits;
char modename[128];
char drivername[32];
} data;
};
/* -------------------------------------------------------------------- */
/*
* ioctl values
*/
#define HDLCDRVCTL_GETMODEMPAR 0
#define HDLCDRVCTL_SETMODEMPAR 1
#define HDLCDRVCTL_MODEMPARMASK 2 /* not handled by hdlcdrv */
#define HDLCDRVCTL_GETCHANNELPAR 10
#define HDLCDRVCTL_SETCHANNELPAR 11
#define HDLCDRVCTL_OLDGETSTAT 20
#define HDLCDRVCTL_CALIBRATE 21
#define HDLCDRVCTL_GETSTAT 22
/*
* these are mainly for debugging purposes
*/
#define HDLCDRVCTL_GETSAMPLES 30
#define HDLCDRVCTL_GETBITS 31
/*
* not handled by hdlcdrv, but by its depending drivers
*/
#define HDLCDRVCTL_GETMODE 40
#define HDLCDRVCTL_SETMODE 41
#define HDLCDRVCTL_MODELIST 42
#define HDLCDRVCTL_DRIVERNAME 43
/*
* mask of needed modem parameters, returned by HDLCDRVCTL_MODEMPARMASK
*/
#define HDLCDRV_PARMASK_IOBASE (1<<0)
#define HDLCDRV_PARMASK_IRQ (1<<1)
#define HDLCDRV_PARMASK_DMA (1<<2)
#define HDLCDRV_PARMASK_DMA2 (1<<3)
#define HDLCDRV_PARMASK_SERIOBASE (1<<4)
#define HDLCDRV_PARMASK_PARIOBASE (1<<5)
#define HDLCDRV_PARMASK_MIDIIOBASE (1<<6)
/* -------------------------------------------------------------------- */
/* -------------------------------------------------------------------- */
#endif /* _UAPI_HDLCDRV_H */
/* -------------------------------------------------------------------- */

37
include/uapi/linux/netrom.h
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* These are the public elements of the Linux kernel NET/ROM implementation.
* For kernel AX.25 see the file ax25.h. This file requires ax25.h for the
* definition of the ax25_address structure.
*/
#ifndef NETROM_KERNEL_H
#define NETROM_KERNEL_H
#include <linux/ax25.h>
#define NETROM_MTU 236
#define NETROM_T1 1
#define NETROM_T2 2
#define NETROM_N2 3
#define NETROM_T4 6
#define NETROM_IDLE 7
#define SIOCNRDECOBS (SIOCPROTOPRIVATE+2)
struct nr_route_struct {
#define NETROM_NEIGH 0
#define NETROM_NODE 1
int type;
ax25_address callsign;
char device[16];
unsigned int quality;
char mnemonic[7];
ax25_address neighbour;
unsigned int obs_count;
unsigned int ndigis;
ax25_address digipeaters[AX25_MAX_DIGIS];
};
#endif

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include/uapi/linux/rose.h
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* These are the public elements of the Linux kernel Rose implementation.
* For kernel AX.25 see the file ax25.h. This file requires ax25.h for the
* definition of the ax25_address structure.
*/
#ifndef ROSE_KERNEL_H
#define ROSE_KERNEL_H
#include <linux/socket.h>
#include <linux/ax25.h>
#define ROSE_MTU 251
#define ROSE_MAX_DIGIS 6
#define ROSE_DEFER 1
#define ROSE_T1 2
#define ROSE_T2 3
#define ROSE_T3 4
#define ROSE_IDLE 5
#define ROSE_QBITINCL 6
#define ROSE_HOLDBACK 7
#define SIOCRSGCAUSE (SIOCPROTOPRIVATE+0)
#define SIOCRSSCAUSE (SIOCPROTOPRIVATE+1)
#define SIOCRSL2CALL (SIOCPROTOPRIVATE+2)
#define SIOCRSSL2CALL (SIOCPROTOPRIVATE+2)
#define SIOCRSACCEPT (SIOCPROTOPRIVATE+3)
#define SIOCRSCLRRT (SIOCPROTOPRIVATE+4)
#define SIOCRSGL2CALL (SIOCPROTOPRIVATE+5)
#define SIOCRSGFACILITIES (SIOCPROTOPRIVATE+6)
#define ROSE_DTE_ORIGINATED 0x00
#define ROSE_NUMBER_BUSY 0x01
#define ROSE_INVALID_FACILITY 0x03
#define ROSE_NETWORK_CONGESTION 0x05
#define ROSE_OUT_OF_ORDER 0x09
#define ROSE_ACCESS_BARRED 0x0B
#define ROSE_NOT_OBTAINABLE 0x0D
#define ROSE_REMOTE_PROCEDURE 0x11
#define ROSE_LOCAL_PROCEDURE 0x13
#define ROSE_SHIP_ABSENT 0x39
typedef struct {
char rose_addr[5];
} rose_address;
struct sockaddr_rose {
__kernel_sa_family_t srose_family;
rose_address srose_addr;
ax25_address srose_call;
int srose_ndigis;
ax25_address srose_digi;
};
struct full_sockaddr_rose {
__kernel_sa_family_t srose_family;
rose_address srose_addr;
ax25_address srose_call;
unsigned int srose_ndigis;
ax25_address srose_digis[ROSE_MAX_DIGIS];
};
struct rose_route_struct {
rose_address address;
unsigned short mask;
ax25_address neighbour;
char device[16];
unsigned char ndigis;
ax25_address digipeaters[AX25_MAX_DIGIS];
};
struct rose_cause_struct {
unsigned char cause;
unsigned char diagnostic;
};
struct rose_facilities_struct {
rose_address source_addr, dest_addr;
ax25_address source_call, dest_call;
unsigned char source_ndigis, dest_ndigis;
ax25_address source_digis[ROSE_MAX_DIGIS];
ax25_address dest_digis[ROSE_MAX_DIGIS];
unsigned int rand;
rose_address fail_addr;
ax25_address fail_call;
};
#endif

174
include/uapi/linux/scc.h
View File

@ -1,174 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/* $Id: scc.h,v 1.29 1997/04/02 14:56:45 jreuter Exp jreuter $ */
#ifndef _UAPI_SCC_H
#define _UAPI_SCC_H
#include <linux/sockios.h>
/* selection of hardware types */
#define PA0HZP 0x00 /* hardware type for PA0HZP SCC card and compatible */
#define EAGLE 0x01 /* hardware type for EAGLE card */
#define PC100 0x02 /* hardware type for PC100 card */
#define PRIMUS 0x04 /* hardware type for PRIMUS-PC (DG9BL) card */
#define DRSI 0x08 /* hardware type for DRSI PC*Packet card */
#define BAYCOM 0x10 /* hardware type for BayCom (U)SCC */
/* DEV ioctl() commands */
enum SCC_ioctl_cmds {
SIOCSCCRESERVED = SIOCDEVPRIVATE,
SIOCSCCCFG,
SIOCSCCINI,
SIOCSCCCHANINI,
SIOCSCCSMEM,
SIOCSCCGKISS,
SIOCSCCSKISS,
SIOCSCCGSTAT,
SIOCSCCCAL
};
/* Device parameter control (from WAMPES) */
enum L1_params {
PARAM_DATA,
PARAM_TXDELAY,
PARAM_PERSIST,
PARAM_SLOTTIME,
PARAM_TXTAIL,
PARAM_FULLDUP,
PARAM_SOFTDCD, /* was: PARAM_HW */
PARAM_MUTE, /* ??? */
PARAM_DTR,
PARAM_RTS,
PARAM_SPEED,
PARAM_ENDDELAY, /* ??? */
PARAM_GROUP,
PARAM_IDLE,
PARAM_MIN,
PARAM_MAXKEY,
PARAM_WAIT,
PARAM_MAXDEFER,
PARAM_TX,
PARAM_HWEVENT = 31,
PARAM_RETURN = 255 /* reset kiss mode */
};
/* fulldup parameter */
enum FULLDUP_modes {
KISS_DUPLEX_HALF, /* normal CSMA operation */
KISS_DUPLEX_FULL, /* fullduplex, key down trx after transmission */
KISS_DUPLEX_LINK, /* fullduplex, key down trx after 'idletime' sec */
KISS_DUPLEX_OPTIMA /* fullduplex, let the protocol layer control the hw */
};
/* misc. parameters */
#define TIMER_OFF 65535U /* to switch off timers */
#define NO_SUCH_PARAM 65534U /* param not implemented */
/* HWEVENT parameter */
enum HWEVENT_opts {
HWEV_DCD_ON,
HWEV_DCD_OFF,
HWEV_ALL_SENT
};
/* channel grouping */
#define RXGROUP 0100 /* if set, only tx when all channels clear */
#define TXGROUP 0200 /* if set, don't transmit simultaneously */
/* Tx/Rx clock sources */
enum CLOCK_sources {
CLK_DPLL, /* normal halfduplex operation */
CLK_EXTERNAL, /* external clocking (G3RUH/DF9IC modems) */
CLK_DIVIDER, /* Rx = DPLL, Tx = divider (fullduplex with */
/* modems without clock regeneration */
CLK_BRG /* experimental fullduplex mode with DPLL/BRG for */
/* MODEMs without clock recovery */
};
/* Tx state */
enum TX_state {
TXS_IDLE, /* Transmitter off, no data pending */
TXS_BUSY, /* waiting for permission to send / tailtime */
TXS_ACTIVE, /* Transmitter on, sending data */
TXS_NEWFRAME, /* reset CRC and send (next) frame */
TXS_IDLE2, /* Transmitter on, no data pending */
TXS_WAIT, /* Waiting for Mintime to expire */
TXS_TIMEOUT /* We had a transmission timeout */
};
typedef unsigned long io_port; /* type definition for an 'io port address' */
/* SCC statistical information */
struct scc_stat {
long rxints; /* Receiver interrupts */
long txints; /* Transmitter interrupts */
long exints; /* External/status interrupts */
long spints; /* Special receiver interrupts */
long txframes; /* Packets sent */
long rxframes; /* Number of Frames Actually Received */
long rxerrs; /* CRC Errors */
long txerrs; /* KISS errors */
unsigned int nospace; /* "Out of buffers" */
unsigned int rx_over; /* Receiver Overruns */
unsigned int tx_under; /* Transmitter Underruns */
unsigned int tx_state; /* Transmitter state */
int tx_queued; /* tx frames enqueued */
unsigned int maxqueue; /* allocated tx_buffers */
unsigned int bufsize; /* used buffersize */
};
struct scc_modem {
long speed; /* Line speed, bps */
char clocksrc; /* 0 = DPLL, 1 = external, 2 = divider */
char nrz; /* NRZ instead of NRZI */
};
struct scc_kiss_cmd {
int command; /* one of the KISS-Commands defined above */
unsigned param; /* KISS-Param */
};
struct scc_hw_config {
io_port data_a; /* data port channel A */
io_port ctrl_a; /* control port channel A */
io_port data_b; /* data port channel B */
io_port ctrl_b; /* control port channel B */
io_port vector_latch; /* INTACK-Latch (#) */
io_port special; /* special function port */
int irq; /* irq */
long clock; /* clock */
char option; /* command for function port */
char brand; /* hardware type */
char escc; /* use ext. features of a 8580/85180/85280 */
};
/* (#) only one INTACK latch allowed. */
struct scc_mem_config {
unsigned int dummy;
unsigned int bufsize;
};
struct scc_calibrate {
unsigned int time;
unsigned char pattern;
};
#endif /* _UAPI_SCC_H */

1
net/Kconfig
View File

@ -414,7 +414,6 @@ endmenu # Network testing
endmenu # Networking options endmenu # Networking options
source "net/ax25/Kconfig"
source "net/can/Kconfig" source "net/can/Kconfig"
source "net/bluetooth/Kconfig" source "net/bluetooth/Kconfig"
source "net/rxrpc/Kconfig" source "net/rxrpc/Kconfig"

3
net/Makefile
View File

@ -28,9 +28,6 @@ obj-y += dsa/
obj-$(CONFIG_ATALK) += appletalk/ obj-$(CONFIG_ATALK) += appletalk/
obj-$(CONFIG_X25) += x25/ obj-$(CONFIG_X25) += x25/
obj-$(CONFIG_LAPB) += lapb/ obj-$(CONFIG_LAPB) += lapb/
obj-$(CONFIG_NETROM) += netrom/
obj-$(CONFIG_ROSE) += rose/
obj-$(CONFIG_AX25) += ax25/
obj-$(CONFIG_CAN) += can/ obj-$(CONFIG_CAN) += can/
obj-$(CONFIG_BT) += bluetooth/ obj-$(CONFIG_BT) += bluetooth/
obj-$(CONFIG_SUNRPC) += sunrpc/ obj-$(CONFIG_SUNRPC) += sunrpc/

108
net/ax25/Kconfig
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@ -1,108 +0,0 @@
# SPDX-License-Identifier: GPL-2.0-only
#
# Amateur Radio protocols and AX.25 device configuration
#
menuconfig HAMRADIO
depends on NET
bool "Amateur Radio support"
help
If you want to connect your Linux box to an amateur radio, answer Y
here. You want to read <https://www.tapr.org/>
and more specifically about AX.25 on Linux
<https://linux-ax25.in-berlin.de>.
Note that the answer to this question won't directly affect the
kernel: saying N will just cause the configurator to skip all
the questions about amateur radio.
comment "Packet Radio protocols"
depends on HAMRADIO
config AX25
tristate "Amateur Radio AX.25 Level 2 protocol"
depends on HAMRADIO
help
This is the protocol used for computer communication over amateur
radio. It is either used by itself for point-to-point links, or to
carry other protocols such as tcp/ip. To use it, you need a device
that connects your Linux box to your amateur radio. You can either
use a low speed TNC (a Terminal Node Controller acts as a kind of
modem connecting your computer's serial port to your radio's
microphone input and speaker output) supporting the KISS protocol or
one of the various SCC cards that are supported by the generic Z8530
or the DMA SCC driver. Another option are the Baycom modem serial
and parallel port hacks or the sound card modem (supported by their
own drivers). If you say Y here, you also have to say Y to one of
those drivers.
Information about where to get supporting software for Linux amateur
radio as well as information about how to configure an AX.25 port is
contained in the AX25-HOWTO, available from
<https://www.tldp.org/docs.html#howto>. You might also want to
check out the file <file:Documentation/networking/ax25.rst> in the
kernel source. More information about digital amateur radio in
general is on the WWW at
<https://www.tapr.org/>.
To compile this driver as a module, choose M here: the
module will be called ax25.
config AX25_DAMA_SLAVE
bool "AX.25 DAMA Slave support"
default y
depends on AX25
help
DAMA is a mechanism to prevent collisions when doing AX.25
networking. A DAMA server (called "master") accepts incoming traffic
from clients (called "slaves") and redistributes it to other slaves.
If you say Y here, your Linux box will act as a DAMA slave; this is
transparent in that you don't have to do any special DAMA
configuration. Linux cannot yet act as a DAMA server. This option
only compiles DAMA slave support into the kernel. It still needs to
be enabled at runtime. For more about DAMA see
<https://linux-ax25.in-berlin.de>. If unsure, say Y.
config NETROM
tristate "Amateur Radio NET/ROM protocol"
depends on AX25
help
NET/ROM is a network layer protocol on top of AX.25 useful for
routing.
A comprehensive listing of all the software for Linux amateur radio
users as well as information about how to configure an AX.25 port is
contained in the Linux Ham Wiki, available from
<https://linux-ax25.in-berlin.de>. You also might want to check out
the file <file:Documentation/networking/ax25.rst>. More information
about digital amateur radio in general is on the WWW at
<https://www.tapr.org/>.
To compile this driver as a module, choose M here: the
module will be called netrom.
config ROSE
tristate "Amateur Radio X.25 PLP (Rose)"
depends on AX25
help
The Packet Layer Protocol (PLP) is a way to route packets over X.25
connections in general and amateur radio AX.25 connections in
particular, essentially an alternative to NET/ROM.
A comprehensive listing of all the software for Linux amateur radio
users as well as information about how to configure an AX.25 port is
contained in the Linux Ham Wiki, available from
<https://linux-ax25.in-berlin.de>. You also might want to check out
the file <file:Documentation/networking/ax25.rst>. More information
about digital amateur radio in general is on the WWW at
<https://www.tapr.org/>.
To compile this driver as a module, choose M here: the
module will be called rose.
menu "AX.25 network device drivers"
depends on HAMRADIO && AX25
source "drivers/net/hamradio/Kconfig"
endmenu

12
net/ax25/Makefile
View File

@ -1,12 +0,0 @@
# SPDX-License-Identifier: GPL-2.0
#
# Makefile for the Linux AX.25 layer.
#
obj-$(CONFIG_AX25) += ax25.o
ax25-y := ax25_addr.o ax25_dev.o ax25_iface.o ax25_in.o ax25_ip.o ax25_out.o \
ax25_route.o ax25_std_in.o ax25_std_subr.o ax25_std_timer.o \
ax25_subr.o ax25_timer.o ax25_uid.o af_ax25.o
ax25-$(CONFIG_AX25_DAMA_SLAVE) += ax25_ds_in.o ax25_ds_subr.o ax25_ds_timer.o
ax25-$(CONFIG_SYSCTL) += sysctl_net_ax25.o

2089
net/ax25/af_ax25.c
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File diff suppressed because it is too large Load Diff

303
net/ax25/ax25_addr.c
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@ -1,303 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
/*
* The default broadcast address of an interface is QST-0; the default address
* is LINUX-1. The null address is defined as a callsign of all spaces with
* an SSID of zero.
*/
const ax25_address ax25_bcast =
{{'Q' << 1, 'S' << 1, 'T' << 1, ' ' << 1, ' ' << 1, ' ' << 1, 0 << 1}};
const ax25_address ax25_defaddr =
{{'L' << 1, 'I' << 1, 'N' << 1, 'U' << 1, 'X' << 1, ' ' << 1, 1 << 1}};
const ax25_address null_ax25_address =
{{' ' << 1, ' ' << 1, ' ' << 1, ' ' << 1, ' ' << 1, ' ' << 1, 0 << 1}};
EXPORT_SYMBOL_GPL(ax25_bcast);
EXPORT_SYMBOL_GPL(ax25_defaddr);
EXPORT_SYMBOL(null_ax25_address);
/*
* ax25 -> ascii conversion
*/
char *ax2asc(char *buf, const ax25_address *a)
{
char c, *s;
int n;
for (n = 0, s = buf; n < 6; n++) {
c = (a->ax25_call[n] >> 1) & 0x7F;
if (c != ' ') *s++ = c;
}
*s++ = '-';
if ((n = ((a->ax25_call[6] >> 1) & 0x0F)) > 9) {
*s++ = '1';
n -= 10;
}
*s++ = n + '0';
*s++ = '\0';
if (*buf == '\0' || *buf == '-')
return "*";
return buf;
}
EXPORT_SYMBOL(ax2asc);
/*
* ascii -> ax25 conversion
*/
void asc2ax(ax25_address *addr, const char *callsign)
{
const char *s;
int n;
for (s = callsign, n = 0; n < 6; n++) {
if (*s != '\0' && *s != '-')
addr->ax25_call[n] = *s++;
else
addr->ax25_call[n] = ' ';
addr->ax25_call[n] <<= 1;
addr->ax25_call[n] &= 0xFE;
}
if (*s++ == '\0') {
addr->ax25_call[6] = 0x00;
return;
}
addr->ax25_call[6] = *s++ - '0';
if (*s != '\0') {
addr->ax25_call[6] *= 10;
addr->ax25_call[6] += *s++ - '0';
}
addr->ax25_call[6] <<= 1;
addr->ax25_call[6] &= 0x1E;
}
EXPORT_SYMBOL(asc2ax);
/*
* Compare two ax.25 addresses
*/
int ax25cmp(const ax25_address *a, const ax25_address *b)
{
int ct = 0;
while (ct < 6) {
if ((a->ax25_call[ct] & 0xFE) != (b->ax25_call[ct] & 0xFE)) /* Clean off repeater bits */
return 1;
ct++;
}
if ((a->ax25_call[ct] & 0x1E) == (b->ax25_call[ct] & 0x1E)) /* SSID without control bit */
return 0;
return 2; /* Partial match */
}
EXPORT_SYMBOL(ax25cmp);
/*
* Compare two AX.25 digipeater paths.
*/
int ax25digicmp(const ax25_digi *digi1, const ax25_digi *digi2)
{
int i;
if (digi1->ndigi != digi2->ndigi)
return 1;
if (digi1->lastrepeat != digi2->lastrepeat)
return 1;
for (i = 0; i < digi1->ndigi; i++)
if (ax25cmp(&digi1->calls[i], &digi2->calls[i]) != 0)
return 1;
return 0;
}
/*
* Given an AX.25 address pull of to, from, digi list, command/response and the start of data
*
*/
const unsigned char *ax25_addr_parse(const unsigned char *buf, int len,
ax25_address *src, ax25_address *dest, ax25_digi *digi, int *flags,
int *dama)
{
int d = 0;
if (len < 14) return NULL;
if (flags != NULL) {
*flags = 0;
if (buf[6] & AX25_CBIT)
*flags = AX25_COMMAND;
if (buf[13] & AX25_CBIT)
*flags = AX25_RESPONSE;
}
if (dama != NULL)
*dama = ~buf[13] & AX25_DAMA_FLAG;
/* Copy to, from */
if (dest != NULL)
memcpy(dest, buf + 0, AX25_ADDR_LEN);
if (src != NULL)
memcpy(src, buf + 7, AX25_ADDR_LEN);
buf += 2 * AX25_ADDR_LEN;
len -= 2 * AX25_ADDR_LEN;
digi->lastrepeat = -1;
digi->ndigi = 0;
while (!(buf[-1] & AX25_EBIT)) {
if (d >= AX25_MAX_DIGIS)
return NULL;
if (len < AX25_ADDR_LEN)
return NULL;
memcpy(&digi->calls[d], buf, AX25_ADDR_LEN);
digi->ndigi = d + 1;
if (buf[6] & AX25_HBIT) {
digi->repeated[d] = 1;
digi->lastrepeat = d;
} else {
digi->repeated[d] = 0;
}
buf += AX25_ADDR_LEN;
len -= AX25_ADDR_LEN;
d++;
}
return buf;
}
/*
* Assemble an AX.25 header from the bits
*/
int ax25_addr_build(unsigned char *buf, const ax25_address *src,
const ax25_address *dest, const ax25_digi *d, int flag, int modulus)
{
int len = 0;
int ct = 0;
memcpy(buf, dest, AX25_ADDR_LEN);
buf[6] &= ~(AX25_EBIT | AX25_CBIT);
buf[6] |= AX25_SSSID_SPARE;
if (flag == AX25_COMMAND) buf[6] |= AX25_CBIT;
buf += AX25_ADDR_LEN;
len += AX25_ADDR_LEN;
memcpy(buf, src, AX25_ADDR_LEN);
buf[6] &= ~(AX25_EBIT | AX25_CBIT);
buf[6] &= ~AX25_SSSID_SPARE;
if (modulus == AX25_MODULUS)
buf[6] |= AX25_SSSID_SPARE;
else
buf[6] |= AX25_ESSID_SPARE;
if (flag == AX25_RESPONSE) buf[6] |= AX25_CBIT;
/*
* Fast path the normal digiless path
*/
if (d == NULL || d->ndigi == 0) {
buf[6] |= AX25_EBIT;
return 2 * AX25_ADDR_LEN;
}
buf += AX25_ADDR_LEN;
len += AX25_ADDR_LEN;
while (ct < d->ndigi) {
memcpy(buf, &d->calls[ct], AX25_ADDR_LEN);
if (d->repeated[ct])
buf[6] |= AX25_HBIT;
else
buf[6] &= ~AX25_HBIT;
buf[6] &= ~AX25_EBIT;
buf[6] |= AX25_SSSID_SPARE;
buf += AX25_ADDR_LEN;
len += AX25_ADDR_LEN;
ct++;
}
buf[-1] |= AX25_EBIT;
return len;
}
int ax25_addr_size(const ax25_digi *dp)
{
if (dp == NULL)
return 2 * AX25_ADDR_LEN;
return AX25_ADDR_LEN * (2 + dp->ndigi);
}
/*
* Reverse Digipeat List. May not pass both parameters as same struct
*/
void ax25_digi_invert(const ax25_digi *in, ax25_digi *out)
{
int ct;
out->ndigi = in->ndigi;
out->lastrepeat = in->ndigi - in->lastrepeat - 2;
/* Invert the digipeaters */
for (ct = 0; ct < in->ndigi; ct++) {
out->calls[ct] = in->calls[in->ndigi - ct - 1];
if (ct <= out->lastrepeat) {
out->calls[ct].ax25_call[6] |= AX25_HBIT;
out->repeated[ct] = 1;
} else {
out->calls[ct].ax25_call[6] &= ~AX25_HBIT;
out->repeated[ct] = 0;
}
}
}

200
net/ax25/ax25_dev.c
View File

@ -1,200 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/slab.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/spinlock.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/list.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/init.h>
static LIST_HEAD(ax25_dev_list);
DEFINE_SPINLOCK(ax25_dev_lock);
ax25_dev *ax25_addr_ax25dev(ax25_address *addr)
{
ax25_dev *ax25_dev, *res = NULL;
spin_lock_bh(&ax25_dev_lock);
list_for_each_entry(ax25_dev, &ax25_dev_list, list)
if (ax25cmp(addr, (const ax25_address *)ax25_dev->dev->dev_addr) == 0) {
res = ax25_dev;
ax25_dev_hold(ax25_dev);
break;
}
spin_unlock_bh(&ax25_dev_lock);
return res;
}
/*
* This is called when an interface is brought up. These are
* reasonable defaults.
*/
void ax25_dev_device_up(struct net_device *dev)
{
ax25_dev *ax25_dev;
ax25_dev = kzalloc_obj(*ax25_dev);
if (!ax25_dev) {
printk(KERN_ERR "AX.25: ax25_dev_device_up - out of memory\n");
return;
}
refcount_set(&ax25_dev->refcount, 1);
ax25_dev->dev = dev;
netdev_hold(dev, &ax25_dev->dev_tracker, GFP_KERNEL);
ax25_dev->forward = NULL;
ax25_dev->device_up = true;
ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE;
ax25_dev->values[AX25_VALUES_AXDEFMODE] = AX25_DEF_AXDEFMODE;
ax25_dev->values[AX25_VALUES_BACKOFF] = AX25_DEF_BACKOFF;
ax25_dev->values[AX25_VALUES_CONMODE] = AX25_DEF_CONMODE;
ax25_dev->values[AX25_VALUES_WINDOW] = AX25_DEF_WINDOW;
ax25_dev->values[AX25_VALUES_EWINDOW] = AX25_DEF_EWINDOW;
ax25_dev->values[AX25_VALUES_T1] = AX25_DEF_T1;
ax25_dev->values[AX25_VALUES_T2] = AX25_DEF_T2;
ax25_dev->values[AX25_VALUES_T3] = AX25_DEF_T3;
ax25_dev->values[AX25_VALUES_IDLE] = AX25_DEF_IDLE;
ax25_dev->values[AX25_VALUES_N2] = AX25_DEF_N2;
ax25_dev->values[AX25_VALUES_PACLEN] = AX25_DEF_PACLEN;
ax25_dev->values[AX25_VALUES_PROTOCOL] = AX25_DEF_PROTOCOL;
#ifdef CONFIG_AX25_DAMA_SLAVE
ax25_dev->values[AX25_VALUES_DS_TIMEOUT]= AX25_DEF_DS_TIMEOUT;
ax25_ds_setup_timer(ax25_dev);
#endif
spin_lock_bh(&ax25_dev_lock);
list_add(&ax25_dev->list, &ax25_dev_list);
rcu_assign_pointer(dev->ax25_ptr, ax25_dev);
spin_unlock_bh(&ax25_dev_lock);
ax25_register_dev_sysctl(ax25_dev);
}
void ax25_dev_device_down(struct net_device *dev)
{
ax25_dev *s, *ax25_dev;
if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
return;
ax25_unregister_dev_sysctl(ax25_dev);
spin_lock_bh(&ax25_dev_lock);
#ifdef CONFIG_AX25_DAMA_SLAVE
timer_shutdown_sync(&ax25_dev->dama.slave_timer);
#endif
/*
* Remove any packet forwarding that points to this device.
*/
list_for_each_entry(s, &ax25_dev_list, list)
if (s->forward == dev)
s->forward = NULL;
list_for_each_entry(s, &ax25_dev_list, list) {
if (s == ax25_dev) {
list_del(&s->list);
break;
}
}
RCU_INIT_POINTER(dev->ax25_ptr, NULL);
spin_unlock_bh(&ax25_dev_lock);
netdev_put(dev, &ax25_dev->dev_tracker);
ax25_dev_put(ax25_dev);
}
int ax25_fwd_ioctl(unsigned int cmd, struct ax25_fwd_struct *fwd)
{
ax25_dev *ax25_dev, *fwd_dev;
if ((ax25_dev = ax25_addr_ax25dev(&fwd->port_from)) == NULL)
return -EINVAL;
switch (cmd) {
case SIOCAX25ADDFWD:
fwd_dev = ax25_addr_ax25dev(&fwd->port_to);
if (!fwd_dev) {
ax25_dev_put(ax25_dev);
return -EINVAL;
}
if (ax25_dev->forward) {
ax25_dev_put(fwd_dev);
ax25_dev_put(ax25_dev);
return -EINVAL;
}
ax25_dev->forward = fwd_dev->dev;
ax25_dev_put(fwd_dev);
ax25_dev_put(ax25_dev);
break;
case SIOCAX25DELFWD:
if (!ax25_dev->forward) {
ax25_dev_put(ax25_dev);
return -EINVAL;
}
ax25_dev->forward = NULL;
ax25_dev_put(ax25_dev);
break;
default:
ax25_dev_put(ax25_dev);
return -EINVAL;
}
return 0;
}
struct net_device *ax25_fwd_dev(struct net_device *dev)
{
ax25_dev *ax25_dev;
if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
return dev;
if (ax25_dev->forward == NULL)
return dev;
return ax25_dev->forward;
}
/*
* Free all memory associated with device structures.
*/
void __exit ax25_dev_free(void)
{
ax25_dev *s, *n;
spin_lock_bh(&ax25_dev_lock);
list_for_each_entry_safe(s, n, &ax25_dev_list, list) {
netdev_put(s->dev, &s->dev_tracker);
list_del(&s->list);
ax25_dev_put(s);
}
spin_unlock_bh(&ax25_dev_lock);
}

298
net/ax25/ax25_ds_in.c
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@ -1,298 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
* Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
/*
* State machine for state 1, Awaiting Connection State.
* The handling of the timer(s) is in file ax25_ds_timer.c.
* Handling of state 0 and connection release is in ax25.c.
*/
static int ax25_ds_state1_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int pf, int type)
{
switch (frametype) {
case AX25_SABM:
ax25->modulus = AX25_MODULUS;
ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
break;
case AX25_SABME:
ax25->modulus = AX25_EMODULUS;
ax25->window = ax25->ax25_dev->values[AX25_VALUES_EWINDOW];
ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
break;
case AX25_DISC:
ax25_send_control(ax25, AX25_DM, pf, AX25_RESPONSE);
break;
case AX25_UA:
ax25_calculate_rtt(ax25);
ax25_stop_t1timer(ax25);
ax25_start_t3timer(ax25);
ax25_start_idletimer(ax25);
ax25->vs = 0;
ax25->va = 0;
ax25->vr = 0;
ax25->state = AX25_STATE_3;
ax25->n2count = 0;
if (ax25->sk != NULL) {
bh_lock_sock(ax25->sk);
ax25->sk->sk_state = TCP_ESTABLISHED;
/*
* For WAIT_SABM connections we will produce an accept
* ready socket here
*/
if (!sock_flag(ax25->sk, SOCK_DEAD))
ax25->sk->sk_state_change(ax25->sk);
bh_unlock_sock(ax25->sk);
}
ax25_dama_on(ax25);
/* according to DK4EG's spec we are required to
* send a RR RESPONSE FINAL NR=0.
*/
ax25_std_enquiry_response(ax25);
break;
case AX25_DM:
if (pf)
ax25_disconnect(ax25, ECONNREFUSED);
break;
default:
if (pf)
ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
break;
}
return 0;
}
/*
* State machine for state 2, Awaiting Release State.
* The handling of the timer(s) is in file ax25_ds_timer.c
* Handling of state 0 and connection release is in ax25.c.
*/
static int ax25_ds_state2_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int pf, int type)
{
switch (frametype) {
case AX25_SABM:
case AX25_SABME:
ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
ax25_dama_off(ax25);
break;
case AX25_DISC:
ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
ax25_dama_off(ax25);
ax25_disconnect(ax25, 0);
break;
case AX25_DM:
case AX25_UA:
if (pf) {
ax25_dama_off(ax25);
ax25_disconnect(ax25, 0);
}
break;
case AX25_I:
case AX25_REJ:
case AX25_RNR:
case AX25_RR:
if (pf) {
ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
ax25_dama_off(ax25);
}
break;
default:
break;
}
return 0;
}
/*
* State machine for state 3, Connected State.
* The handling of the timer(s) is in file ax25_timer.c
* Handling of state 0 and connection release is in ax25.c.
*/
static int ax25_ds_state3_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int ns, int nr, int pf, int type)
{
int queued = 0;
switch (frametype) {
case AX25_SABM:
case AX25_SABME:
if (frametype == AX25_SABM) {
ax25->modulus = AX25_MODULUS;
ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
} else {
ax25->modulus = AX25_EMODULUS;
ax25->window = ax25->ax25_dev->values[AX25_VALUES_EWINDOW];
}
ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
ax25_stop_t1timer(ax25);
ax25_start_t3timer(ax25);
ax25_start_idletimer(ax25);
ax25->condition = 0x00;
ax25->vs = 0;
ax25->va = 0;
ax25->vr = 0;
ax25_requeue_frames(ax25);
ax25_dama_on(ax25);
break;
case AX25_DISC:
ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
ax25_dama_off(ax25);
ax25_disconnect(ax25, 0);
break;
case AX25_DM:
ax25_dama_off(ax25);
ax25_disconnect(ax25, ECONNRESET);
break;
case AX25_RR:
case AX25_RNR:
if (frametype == AX25_RR)
ax25->condition &= ~AX25_COND_PEER_RX_BUSY;
else
ax25->condition |= AX25_COND_PEER_RX_BUSY;
if (ax25_validate_nr(ax25, nr)) {
if (ax25_check_iframes_acked(ax25, nr))
ax25->n2count=0;
if (type == AX25_COMMAND && pf)
ax25_ds_enquiry_response(ax25);
} else {
ax25_ds_nr_error_recovery(ax25);
ax25->state = AX25_STATE_1;
}
break;
case AX25_REJ:
ax25->condition &= ~AX25_COND_PEER_RX_BUSY;
if (ax25_validate_nr(ax25, nr)) {
if (ax25->va != nr)
ax25->n2count=0;
ax25_frames_acked(ax25, nr);
ax25_calculate_rtt(ax25);
ax25_stop_t1timer(ax25);
ax25_start_t3timer(ax25);
ax25_requeue_frames(ax25);
if (type == AX25_COMMAND && pf)
ax25_ds_enquiry_response(ax25);
} else {
ax25_ds_nr_error_recovery(ax25);
ax25->state = AX25_STATE_1;
}
break;
case AX25_I:
if (!ax25_validate_nr(ax25, nr)) {
ax25_ds_nr_error_recovery(ax25);
ax25->state = AX25_STATE_1;
break;
}
if (ax25->condition & AX25_COND_PEER_RX_BUSY) {
ax25_frames_acked(ax25, nr);
ax25->n2count = 0;
} else {
if (ax25_check_iframes_acked(ax25, nr))
ax25->n2count = 0;
}
if (ax25->condition & AX25_COND_OWN_RX_BUSY) {
if (pf) ax25_ds_enquiry_response(ax25);
break;
}
if (ns == ax25->vr) {
ax25->vr = (ax25->vr + 1) % ax25->modulus;
queued = ax25_rx_iframe(ax25, skb);
if (ax25->condition & AX25_COND_OWN_RX_BUSY)
ax25->vr = ns; /* ax25->vr - 1 */
ax25->condition &= ~AX25_COND_REJECT;
if (pf) {
ax25_ds_enquiry_response(ax25);
} else {
if (!(ax25->condition & AX25_COND_ACK_PENDING)) {
ax25->condition |= AX25_COND_ACK_PENDING;
ax25_start_t2timer(ax25);
}
}
} else {
if (ax25->condition & AX25_COND_REJECT) {
if (pf) ax25_ds_enquiry_response(ax25);
} else {
ax25->condition |= AX25_COND_REJECT;
ax25_ds_enquiry_response(ax25);
ax25->condition &= ~AX25_COND_ACK_PENDING;
}
}
break;
case AX25_FRMR:
case AX25_ILLEGAL:
ax25_ds_establish_data_link(ax25);
ax25->state = AX25_STATE_1;
break;
default:
break;
}
return queued;
}
/*
* Higher level upcall for a LAPB frame
*/
int ax25_ds_frame_in(ax25_cb *ax25, struct sk_buff *skb, int type)
{
int queued = 0, frametype, ns, nr, pf;
frametype = ax25_decode(ax25, skb, &ns, &nr, &pf);
switch (ax25->state) {
case AX25_STATE_1:
queued = ax25_ds_state1_machine(ax25, skb, frametype, pf, type);
break;
case AX25_STATE_2:
queued = ax25_ds_state2_machine(ax25, skb, frametype, pf, type);
break;
case AX25_STATE_3:
queued = ax25_ds_state3_machine(ax25, skb, frametype, ns, nr, pf, type);
break;
}
return queued;
}

204
net/ax25/ax25_ds_subr.c
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@ -1,204 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
* Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/spinlock.h>
#include <linux/net.h>
#include <linux/gfp.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
void ax25_ds_nr_error_recovery(ax25_cb *ax25)
{
ax25_ds_establish_data_link(ax25);
}
/*
* dl1bke 960114: transmit I frames on DAMA poll
*/
void ax25_ds_enquiry_response(ax25_cb *ax25)
{
ax25_cb *ax25o;
/* Please note that neither DK4EG's nor DG2FEF's
* DAMA spec mention the following behaviour as seen
* with TheFirmware:
*
* DB0ACH->DL1BKE <RR C P R0> [DAMA]
* DL1BKE->DB0ACH <I NR=0 NS=0>
* DL1BKE-7->DB0PRA-6 DB0ACH <I C S3 R5>
* DL1BKE->DB0ACH <RR R F R0>
*
* The Flexnet DAMA Master implementation apparently
* insists on the "proper" AX.25 behaviour:
*
* DB0ACH->DL1BKE <RR C P R0> [DAMA]
* DL1BKE->DB0ACH <RR R F R0>
* DL1BKE->DB0ACH <I NR=0 NS=0>
* DL1BKE-7->DB0PRA-6 DB0ACH <I C S3 R5>
*
* Flexnet refuses to send us *any* I frame if we send
* a REJ in case AX25_COND_REJECT is set. It is superfluous in
* this mode anyway (a RR or RNR invokes the retransmission).
* Is this a Flexnet bug?
*/
ax25_std_enquiry_response(ax25);
if (!(ax25->condition & AX25_COND_PEER_RX_BUSY)) {
ax25_requeue_frames(ax25);
ax25_kick(ax25);
}
if (ax25->state == AX25_STATE_1 || ax25->state == AX25_STATE_2 || skb_peek(&ax25->ack_queue) != NULL)
ax25_ds_t1_timeout(ax25);
else
ax25->n2count = 0;
ax25_start_t3timer(ax25);
ax25_ds_set_timer(ax25->ax25_dev);
spin_lock(&ax25_list_lock);
ax25_for_each(ax25o, &ax25_list) {
if (ax25o == ax25)
continue;
if (ax25o->ax25_dev != ax25->ax25_dev)
continue;
if (ax25o->state == AX25_STATE_1 || ax25o->state == AX25_STATE_2) {
ax25_ds_t1_timeout(ax25o);
continue;
}
if (!(ax25o->condition & AX25_COND_PEER_RX_BUSY) && ax25o->state == AX25_STATE_3) {
ax25_requeue_frames(ax25o);
ax25_kick(ax25o);
}
if (ax25o->state == AX25_STATE_1 || ax25o->state == AX25_STATE_2 || skb_peek(&ax25o->ack_queue) != NULL)
ax25_ds_t1_timeout(ax25o);
/* do not start T3 for listening sockets (tnx DD8NE) */
if (ax25o->state != AX25_STATE_0)
ax25_start_t3timer(ax25o);
}
spin_unlock(&ax25_list_lock);
}
void ax25_ds_establish_data_link(ax25_cb *ax25)
{
ax25->condition &= AX25_COND_DAMA_MODE;
ax25->n2count = 0;
ax25_calculate_t1(ax25);
ax25_start_t1timer(ax25);
ax25_stop_t2timer(ax25);
ax25_start_t3timer(ax25);
}
/*
* :::FIXME:::
* This is a kludge. Not all drivers recognize kiss commands.
* We need a driver level request to switch duplex mode, that does
* either SCC changing, PI config or KISS as required. Currently
* this request isn't reliable.
*/
static void ax25_kiss_cmd(ax25_dev *ax25_dev, unsigned char cmd, unsigned char param)
{
struct sk_buff *skb;
unsigned char *p;
if (ax25_dev->dev == NULL)
return;
if ((skb = alloc_skb(2, GFP_ATOMIC)) == NULL)
return;
skb_reset_network_header(skb);
p = skb_put(skb, 2);
*p++ = cmd;
*p++ = param;
skb->protocol = ax25_type_trans(skb, ax25_dev->dev);
dev_queue_xmit(skb);
}
/*
* A nasty problem arises if we count the number of DAMA connections
* wrong, especially when connections on the device already existed
* and our network node (or the sysop) decides to turn on DAMA Master
* mode. We thus flag the 'real' slave connections with
* ax25->dama_slave=1 and look on every disconnect if still slave
* connections exist.
*/
static int ax25_check_dama_slave(ax25_dev *ax25_dev)
{
ax25_cb *ax25;
int res = 0;
spin_lock(&ax25_list_lock);
ax25_for_each(ax25, &ax25_list)
if (ax25->ax25_dev == ax25_dev && (ax25->condition & AX25_COND_DAMA_MODE) && ax25->state > AX25_STATE_1) {
res = 1;
break;
}
spin_unlock(&ax25_list_lock);
return res;
}
static void ax25_dev_dama_on(ax25_dev *ax25_dev)
{
if (ax25_dev == NULL)
return;
if (ax25_dev->dama.slave == 0)
ax25_kiss_cmd(ax25_dev, 5, 1);
ax25_dev->dama.slave = 1;
ax25_ds_set_timer(ax25_dev);
}
void ax25_dev_dama_off(ax25_dev *ax25_dev)
{
if (ax25_dev == NULL)
return;
if (ax25_dev->dama.slave && !ax25_check_dama_slave(ax25_dev)) {
ax25_kiss_cmd(ax25_dev, 5, 0);
ax25_dev->dama.slave = 0;
ax25_ds_del_timer(ax25_dev);
}
}
void ax25_dama_on(ax25_cb *ax25)
{
ax25_dev_dama_on(ax25->ax25_dev);
ax25->condition |= AX25_COND_DAMA_MODE;
}
void ax25_dama_off(ax25_cb *ax25)
{
ax25->condition &= ~AX25_COND_DAMA_MODE;
ax25_dev_dama_off(ax25->ax25_dev);
}

235
net/ax25/ax25_ds_timer.c
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@ -1,235 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
* Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/spinlock.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/jiffies.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <net/tcp_states.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
static void ax25_ds_timeout(struct timer_list *);
/*
* Add DAMA slave timeout timer to timer list.
* Unlike the connection based timers the timeout function gets
* triggered every second. Please note that NET_AX25_DAMA_SLAVE_TIMEOUT
* (aka /proc/sys/net/ax25/{dev}/dama_slave_timeout) is still in
* 1/10th of a second.
*/
void ax25_ds_setup_timer(ax25_dev *ax25_dev)
{
timer_setup(&ax25_dev->dama.slave_timer, ax25_ds_timeout, 0);
}
void ax25_ds_del_timer(ax25_dev *ax25_dev)
{
if (ax25_dev)
timer_delete(&ax25_dev->dama.slave_timer);
}
void ax25_ds_set_timer(ax25_dev *ax25_dev)
{
if (ax25_dev == NULL) /* paranoia */
return;
ax25_dev->dama.slave_timeout =
msecs_to_jiffies(ax25_dev->values[AX25_VALUES_DS_TIMEOUT]) / 10;
mod_timer(&ax25_dev->dama.slave_timer, jiffies + HZ);
}
/*
* DAMA Slave Timeout
* Silently discard all (slave) connections in case our master forgot us...
*/
static void ax25_ds_timeout(struct timer_list *t)
{
ax25_dev *ax25_dev = timer_container_of(ax25_dev, t, dama.slave_timer);
ax25_cb *ax25;
if (ax25_dev == NULL || !ax25_dev->dama.slave)
return; /* Yikes! */
if (!ax25_dev->dama.slave_timeout || --ax25_dev->dama.slave_timeout) {
ax25_ds_set_timer(ax25_dev);
return;
}
spin_lock(&ax25_list_lock);
ax25_for_each(ax25, &ax25_list) {
if (ax25->ax25_dev != ax25_dev || !(ax25->condition & AX25_COND_DAMA_MODE))
continue;
ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
ax25_disconnect(ax25, ETIMEDOUT);
}
spin_unlock(&ax25_list_lock);
ax25_dev_dama_off(ax25_dev);
}
void ax25_ds_heartbeat_expiry(ax25_cb *ax25)
{
struct sock *sk=ax25->sk;
if (sk)
bh_lock_sock(sk);
switch (ax25->state) {
case AX25_STATE_0:
case AX25_STATE_2:
/* Magic here: If we listen() and a new link dies before it
is accepted() it isn't 'dead' so doesn't get removed. */
if (!sk || sock_flag(sk, SOCK_DESTROY) ||
(sk->sk_state == TCP_LISTEN &&
sock_flag(sk, SOCK_DEAD))) {
if (sk) {
sock_hold(sk);
ax25_destroy_socket(ax25);
bh_unlock_sock(sk);
/* Ungrab socket and destroy it */
sock_put(sk);
} else
ax25_destroy_socket(ax25);
return;
}
break;
case AX25_STATE_3:
/*
* Check the state of the receive buffer.
*/
if (sk != NULL) {
if (atomic_read(&sk->sk_rmem_alloc) <
(sk->sk_rcvbuf >> 1) &&
(ax25->condition & AX25_COND_OWN_RX_BUSY)) {
ax25->condition &= ~AX25_COND_OWN_RX_BUSY;
ax25->condition &= ~AX25_COND_ACK_PENDING;
break;
}
}
break;
}
if (sk)
bh_unlock_sock(sk);
ax25_start_heartbeat(ax25);
}
/* dl1bke 960114: T3 works much like the IDLE timeout, but
* gets reloaded with every frame for this
* connection.
*/
void ax25_ds_t3timer_expiry(ax25_cb *ax25)
{
ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
ax25_dama_off(ax25);
ax25_disconnect(ax25, ETIMEDOUT);
}
/* dl1bke 960228: close the connection when IDLE expires.
* unlike T3 this timer gets reloaded only on
* I frames.
*/
void ax25_ds_idletimer_expiry(ax25_cb *ax25)
{
ax25_clear_queues(ax25);
ax25->n2count = 0;
ax25->state = AX25_STATE_2;
ax25_calculate_t1(ax25);
ax25_start_t1timer(ax25);
ax25_stop_t3timer(ax25);
if (ax25->sk != NULL) {
bh_lock_sock(ax25->sk);
ax25->sk->sk_state = TCP_CLOSE;
ax25->sk->sk_err = 0;
ax25->sk->sk_shutdown |= SEND_SHUTDOWN;
if (!sock_flag(ax25->sk, SOCK_DEAD)) {
ax25->sk->sk_state_change(ax25->sk);
sock_set_flag(ax25->sk, SOCK_DEAD);
}
bh_unlock_sock(ax25->sk);
}
}
/* dl1bke 960114: The DAMA protocol requires to send data and SABM/DISC
* within the poll of any connected channel. Remember
* that we are not allowed to send anything unless we
* get polled by the Master.
*
* Thus we'll have to do parts of our T1 handling in
* ax25_enquiry_response().
*/
void ax25_ds_t1_timeout(ax25_cb *ax25)
{
switch (ax25->state) {
case AX25_STATE_1:
if (ax25->n2count == ax25->n2) {
if (ax25->modulus == AX25_MODULUS) {
ax25_disconnect(ax25, ETIMEDOUT);
return;
} else {
ax25->modulus = AX25_MODULUS;
ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
ax25->n2count = 0;
ax25_send_control(ax25, AX25_SABM, AX25_POLLOFF, AX25_COMMAND);
}
} else {
ax25->n2count++;
if (ax25->modulus == AX25_MODULUS)
ax25_send_control(ax25, AX25_SABM, AX25_POLLOFF, AX25_COMMAND);
else
ax25_send_control(ax25, AX25_SABME, AX25_POLLOFF, AX25_COMMAND);
}
break;
case AX25_STATE_2:
if (ax25->n2count == ax25->n2) {
ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
if (!sock_flag(ax25->sk, SOCK_DESTROY))
ax25_disconnect(ax25, ETIMEDOUT);
return;
} else {
ax25->n2count++;
}
break;
case AX25_STATE_3:
if (ax25->n2count == ax25->n2) {
ax25_send_control(ax25, AX25_DM, AX25_POLLON, AX25_RESPONSE);
ax25_disconnect(ax25, ETIMEDOUT);
return;
} else {
ax25->n2count++;
}
break;
}
ax25_calculate_t1(ax25);
ax25_start_t1timer(ax25);
}

214
net/ax25/ax25_iface.c
View File

@ -1,214 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/slab.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
static struct ax25_protocol *protocol_list;
static DEFINE_RWLOCK(protocol_list_lock);
static HLIST_HEAD(ax25_linkfail_list);
static DEFINE_SPINLOCK(linkfail_lock);
static struct listen_struct {
struct listen_struct *next;
ax25_address callsign;
struct net_device *dev;
} *listen_list = NULL;
static DEFINE_SPINLOCK(listen_lock);
/*
* Do not register the internal protocols AX25_P_TEXT, AX25_P_SEGMENT,
* AX25_P_IP or AX25_P_ARP ...
*/
void ax25_register_pid(struct ax25_protocol *ap)
{
write_lock_bh(&protocol_list_lock);
ap->next = protocol_list;
protocol_list = ap;
write_unlock_bh(&protocol_list_lock);
}
EXPORT_SYMBOL_GPL(ax25_register_pid);
void ax25_protocol_release(unsigned int pid)
{
struct ax25_protocol *protocol;
write_lock_bh(&protocol_list_lock);
protocol = protocol_list;
if (protocol == NULL)
goto out;
if (protocol->pid == pid) {
protocol_list = protocol->next;
goto out;
}
while (protocol != NULL && protocol->next != NULL) {
if (protocol->next->pid == pid) {
protocol->next = protocol->next->next;
goto out;
}
protocol = protocol->next;
}
out:
write_unlock_bh(&protocol_list_lock);
}
EXPORT_SYMBOL(ax25_protocol_release);
void ax25_linkfail_register(struct ax25_linkfail *lf)
{
spin_lock_bh(&linkfail_lock);
hlist_add_head(&lf->lf_node, &ax25_linkfail_list);
spin_unlock_bh(&linkfail_lock);
}
EXPORT_SYMBOL(ax25_linkfail_register);
void ax25_linkfail_release(struct ax25_linkfail *lf)
{
spin_lock_bh(&linkfail_lock);
hlist_del_init(&lf->lf_node);
spin_unlock_bh(&linkfail_lock);
}
EXPORT_SYMBOL(ax25_linkfail_release);
int ax25_listen_register(const ax25_address *callsign, struct net_device *dev)
{
struct listen_struct *listen;
if (ax25_listen_mine(callsign, dev))
return 0;
if ((listen = kmalloc_obj(*listen, GFP_ATOMIC)) == NULL)
return -ENOMEM;
listen->callsign = *callsign;
listen->dev = dev;
spin_lock_bh(&listen_lock);
listen->next = listen_list;
listen_list = listen;
spin_unlock_bh(&listen_lock);
return 0;
}
EXPORT_SYMBOL(ax25_listen_register);
void ax25_listen_release(const ax25_address *callsign, struct net_device *dev)
{
struct listen_struct *s, *listen;
spin_lock_bh(&listen_lock);
listen = listen_list;
if (listen == NULL) {
spin_unlock_bh(&listen_lock);
return;
}
if (ax25cmp(&listen->callsign, callsign) == 0 && listen->dev == dev) {
listen_list = listen->next;
spin_unlock_bh(&listen_lock);
kfree(listen);
return;
}
while (listen != NULL && listen->next != NULL) {
if (ax25cmp(&listen->next->callsign, callsign) == 0 && listen->next->dev == dev) {
s = listen->next;
listen->next = listen->next->next;
spin_unlock_bh(&listen_lock);
kfree(s);
return;
}
listen = listen->next;
}
spin_unlock_bh(&listen_lock);
}
EXPORT_SYMBOL(ax25_listen_release);
int (*ax25_protocol_function(unsigned int pid))(struct sk_buff *, ax25_cb *)
{
int (*res)(struct sk_buff *, ax25_cb *) = NULL;
struct ax25_protocol *protocol;
read_lock(&protocol_list_lock);
for (protocol = protocol_list; protocol != NULL; protocol = protocol->next)
if (protocol->pid == pid) {
res = protocol->func;
break;
}
read_unlock(&protocol_list_lock);
return res;
}
int ax25_listen_mine(const ax25_address *callsign, struct net_device *dev)
{
struct listen_struct *listen;
spin_lock_bh(&listen_lock);
for (listen = listen_list; listen != NULL; listen = listen->next)
if (ax25cmp(&listen->callsign, callsign) == 0 &&
(listen->dev == dev || listen->dev == NULL)) {
spin_unlock_bh(&listen_lock);
return 1;
}
spin_unlock_bh(&listen_lock);
return 0;
}
void ax25_link_failed(ax25_cb *ax25, int reason)
{
struct ax25_linkfail *lf;
spin_lock_bh(&linkfail_lock);
hlist_for_each_entry(lf, &ax25_linkfail_list, lf_node)
lf->func(ax25, reason);
spin_unlock_bh(&linkfail_lock);
}
int ax25_protocol_is_registered(unsigned int pid)
{
struct ax25_protocol *protocol;
int res = 0;
read_lock_bh(&protocol_list_lock);
for (protocol = protocol_list; protocol != NULL; protocol = protocol->next)
if (protocol->pid == pid) {
res = 1;
break;
}
read_unlock_bh(&protocol_list_lock);
return res;
}

455
net/ax25/ax25_in.c
View File

@ -1,455 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
* Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
* Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/slab.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
/*
* Given a fragment, queue it on the fragment queue and if the fragment
* is complete, send it back to ax25_rx_iframe.
*/
static int ax25_rx_fragment(ax25_cb *ax25, struct sk_buff *skb)
{
struct sk_buff *skbn, *skbo;
if (ax25->fragno != 0) {
if (!(*skb->data & AX25_SEG_FIRST)) {
if ((ax25->fragno - 1) == (*skb->data & AX25_SEG_REM)) {
/* Enqueue fragment */
ax25->fragno = *skb->data & AX25_SEG_REM;
skb_pull(skb, 1); /* skip fragno */
ax25->fraglen += skb->len;
skb_queue_tail(&ax25->frag_queue, skb);
/* Last fragment received ? */
if (ax25->fragno == 0) {
skbn = alloc_skb(AX25_MAX_HEADER_LEN +
ax25->fraglen,
GFP_ATOMIC);
if (!skbn) {
skb_queue_purge(&ax25->frag_queue);
return 1;
}
skb_reserve(skbn, AX25_MAX_HEADER_LEN);
skbn->dev = ax25->ax25_dev->dev;
skb_reset_network_header(skbn);
skb_reset_transport_header(skbn);
/* Copy data from the fragments */
while ((skbo = skb_dequeue(&ax25->frag_queue)) != NULL) {
skb_copy_from_linear_data(skbo,
skb_put(skbn, skbo->len),
skbo->len);
kfree_skb(skbo);
}
ax25->fraglen = 0;
if (ax25_rx_iframe(ax25, skbn) == 0)
kfree_skb(skbn);
}
return 1;
}
}
} else {
/* First fragment received */
if (*skb->data & AX25_SEG_FIRST) {
skb_queue_purge(&ax25->frag_queue);
ax25->fragno = *skb->data & AX25_SEG_REM;
skb_pull(skb, 1); /* skip fragno */
ax25->fraglen = skb->len;
skb_queue_tail(&ax25->frag_queue, skb);
return 1;
}
}
return 0;
}
/*
* This is where all valid I frames are sent to, to be dispatched to
* whichever protocol requires them.
*/
int ax25_rx_iframe(ax25_cb *ax25, struct sk_buff *skb)
{
int (*func)(struct sk_buff *, ax25_cb *);
unsigned char pid;
int queued = 0;
if (skb == NULL) return 0;
ax25_start_idletimer(ax25);
pid = *skb->data;
if (pid == AX25_P_IP) {
/* working around a TCP bug to keep additional listeners
* happy. TCP re-uses the buffer and destroys the original
* content.
*/
struct sk_buff *skbn = skb_copy(skb, GFP_ATOMIC);
if (skbn != NULL) {
kfree_skb(skb);
skb = skbn;
}
skb_pull(skb, 1); /* Remove PID */
skb->mac_header = skb->network_header;
skb_reset_network_header(skb);
skb->dev = ax25->ax25_dev->dev;
skb->pkt_type = PACKET_HOST;
skb->protocol = htons(ETH_P_IP);
netif_rx(skb);
return 1;
}
if (pid == AX25_P_SEGMENT) {
skb_pull(skb, 1); /* Remove PID */
return ax25_rx_fragment(ax25, skb);
}
if ((func = ax25_protocol_function(pid)) != NULL) {
skb_pull(skb, 1); /* Remove PID */
return (*func)(skb, ax25);
}
if (ax25->sk != NULL && ax25->ax25_dev->values[AX25_VALUES_CONMODE] == 2) {
if ((!ax25->pidincl && ax25->sk->sk_protocol == pid) ||
ax25->pidincl) {
if (sock_queue_rcv_skb(ax25->sk, skb) == 0)
queued = 1;
else
ax25->condition |= AX25_COND_OWN_RX_BUSY;
}
}
return queued;
}
/*
* Higher level upcall for a LAPB frame
*/
static int ax25_process_rx_frame(ax25_cb *ax25, struct sk_buff *skb, int type, int dama)
{
int queued = 0;
if (ax25->state == AX25_STATE_0)
return 0;
switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
case AX25_PROTO_STD_SIMPLEX:
case AX25_PROTO_STD_DUPLEX:
queued = ax25_std_frame_in(ax25, skb, type);
break;
#ifdef CONFIG_AX25_DAMA_SLAVE
case AX25_PROTO_DAMA_SLAVE:
if (dama || ax25->ax25_dev->dama.slave)
queued = ax25_ds_frame_in(ax25, skb, type);
else
queued = ax25_std_frame_in(ax25, skb, type);
break;
#endif
}
return queued;
}
static int ax25_rcv(struct sk_buff *skb, struct net_device *dev,
const ax25_address *dev_addr, struct packet_type *ptype)
{
ax25_address src, dest, *next_digi = NULL;
int type = 0, mine = 0, dama;
struct sock *make, *sk;
ax25_digi dp, reverse_dp;
ax25_cb *ax25;
ax25_dev *ax25_dev;
/*
* Process the AX.25/LAPB frame.
*/
skb_reset_transport_header(skb);
if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
goto free;
/*
* Parse the address header.
*/
if (ax25_addr_parse(skb->data, skb->len, &src, &dest, &dp, &type, &dama) == NULL)
goto free;
/*
* Ours perhaps ?
*/
if (dp.lastrepeat + 1 < dp.ndigi) /* Not yet digipeated completely */
next_digi = &dp.calls[dp.lastrepeat + 1];
/*
* Pull of the AX.25 headers leaving the CTRL/PID bytes
*/
skb_pull(skb, ax25_addr_size(&dp));
/* For our port addresses ? */
if (ax25cmp(&dest, dev_addr) == 0 && dp.lastrepeat + 1 == dp.ndigi)
mine = 1;
/* Also match on any registered callsign from L3/4 */
if (!mine && ax25_listen_mine(&dest, dev) && dp.lastrepeat + 1 == dp.ndigi)
mine = 1;
/* UI frame - bypass LAPB processing */
if ((*skb->data & ~0x10) == AX25_UI && dp.lastrepeat + 1 == dp.ndigi) {
skb_set_transport_header(skb, 2); /* skip control and pid */
ax25_send_to_raw(&dest, skb, skb->data[1]);
if (!mine && ax25cmp(&dest, (ax25_address *)dev->broadcast) != 0)
goto free;
/* Now we are pointing at the pid byte */
switch (skb->data[1]) {
case AX25_P_IP:
skb_pull(skb,2); /* drop PID/CTRL */
skb_reset_transport_header(skb);
skb_reset_network_header(skb);
skb->dev = dev;
skb->pkt_type = PACKET_HOST;
skb->protocol = htons(ETH_P_IP);
netif_rx(skb);
break;
case AX25_P_ARP:
skb_pull(skb,2);
skb_reset_transport_header(skb);
skb_reset_network_header(skb);
skb->dev = dev;
skb->pkt_type = PACKET_HOST;
skb->protocol = htons(ETH_P_ARP);
netif_rx(skb);
break;
case AX25_P_TEXT:
/* Now find a suitable dgram socket */
sk = ax25_get_socket(&dest, &src, SOCK_DGRAM);
if (sk != NULL) {
bh_lock_sock(sk);
if (atomic_read(&sk->sk_rmem_alloc) >=
sk->sk_rcvbuf) {
kfree_skb(skb);
} else {
/*
* Remove the control and PID.
*/
skb_pull(skb, 2);
if (sock_queue_rcv_skb(sk, skb) != 0)
kfree_skb(skb);
}
bh_unlock_sock(sk);
sock_put(sk);
} else {
kfree_skb(skb);
}
break;
default:
kfree_skb(skb); /* Will scan SOCK_AX25 RAW sockets */
break;
}
return 0;
}
/*
* Is connected mode supported on this device ?
* If not, should we DM the incoming frame (except DMs) or
* silently ignore them. For now we stay quiet.
*/
if (ax25_dev->values[AX25_VALUES_CONMODE] == 0)
goto free;
/* LAPB */
/* AX.25 state 1-4 */
ax25_digi_invert(&dp, &reverse_dp);
if ((ax25 = ax25_find_cb(&dest, &src, &reverse_dp, dev)) != NULL) {
/*
* Process the frame. If it is queued up internally it
* returns one otherwise we free it immediately. This
* routine itself wakes the user context layers so we do
* no further work
*/
if (ax25_process_rx_frame(ax25, skb, type, dama) == 0)
kfree_skb(skb);
ax25_cb_put(ax25);
return 0;
}
/* AX.25 state 0 (disconnected) */
/* a) received not a SABM(E) */
if ((*skb->data & ~AX25_PF) != AX25_SABM &&
(*skb->data & ~AX25_PF) != AX25_SABME) {
/*
* Never reply to a DM. Also ignore any connects for
* addresses that are not our interfaces and not a socket.
*/
if ((*skb->data & ~AX25_PF) != AX25_DM && mine)
ax25_return_dm(dev, &src, &dest, &dp);
goto free;
}
/* b) received SABM(E) */
if (dp.lastrepeat + 1 == dp.ndigi)
sk = ax25_find_listener(&dest, 0, dev, SOCK_SEQPACKET);
else
sk = ax25_find_listener(next_digi, 1, dev, SOCK_SEQPACKET);
if (sk != NULL) {
bh_lock_sock(sk);
if (sk_acceptq_is_full(sk) ||
(make = ax25_make_new(sk, ax25_dev)) == NULL) {
if (mine)
ax25_return_dm(dev, &src, &dest, &dp);
kfree_skb(skb);
bh_unlock_sock(sk);
sock_put(sk);
return 0;
}
ax25 = sk_to_ax25(make);
skb_set_owner_r(skb, make);
skb_queue_head(&sk->sk_receive_queue, skb);
make->sk_state = TCP_ESTABLISHED;
sk_acceptq_added(sk);
bh_unlock_sock(sk);
} else {
if (!mine)
goto free;
if ((ax25 = ax25_create_cb()) == NULL) {
ax25_return_dm(dev, &src, &dest, &dp);
goto free;
}
ax25_fillin_cb(ax25, ax25_dev);
}
ax25->source_addr = dest;
ax25->dest_addr = src;
/*
* Sort out any digipeated paths.
*/
if (dp.ndigi && !ax25->digipeat &&
(ax25->digipeat = kmalloc_obj(ax25_digi, GFP_ATOMIC)) == NULL) {
kfree_skb(skb);
ax25_destroy_socket(ax25);
if (sk)
sock_put(sk);
return 0;
}
if (dp.ndigi == 0) {
kfree(ax25->digipeat);
ax25->digipeat = NULL;
} else {
/* Reverse the source SABM's path */
memcpy(ax25->digipeat, &reverse_dp, sizeof(ax25_digi));
}
if ((*skb->data & ~AX25_PF) == AX25_SABME) {
ax25->modulus = AX25_EMODULUS;
ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
} else {
ax25->modulus = AX25_MODULUS;
ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
}
ax25_send_control(ax25, AX25_UA, AX25_POLLON, AX25_RESPONSE);
#ifdef CONFIG_AX25_DAMA_SLAVE
if (dama && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
ax25_dama_on(ax25);
#endif
ax25->state = AX25_STATE_3;
ax25_cb_add(ax25);
ax25_start_heartbeat(ax25);
ax25_start_t3timer(ax25);
ax25_start_idletimer(ax25);
if (sk) {
if (!sock_flag(sk, SOCK_DEAD))
sk->sk_data_ready(sk);
sock_put(sk);
} else {
free:
kfree_skb(skb);
}
return 0;
}
/*
* Receive an AX.25 frame via a SLIP interface.
*/
int ax25_kiss_rcv(struct sk_buff *skb, struct net_device *dev,
struct packet_type *ptype, struct net_device *orig_dev)
{
skb = skb_share_check(skb, GFP_ATOMIC);
if (!skb)
return NET_RX_DROP;
skb_orphan(skb);
if (!net_eq(dev_net(dev), &init_net)) {
kfree_skb(skb);
return 0;
}
if ((*skb->data & 0x0F) != 0) {
kfree_skb(skb); /* Not a KISS data frame */
return 0;
}
skb_pull(skb, AX25_KISS_HEADER_LEN); /* Remove the KISS byte */
return ax25_rcv(skb, dev, (const ax25_address *)dev->dev_addr, ptype);
}

247
net/ax25/ax25_ip.c
View File

@ -1,247 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/slab.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/termios.h> /* For TIOCINQ/OUTQ */
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/sysctl.h>
#include <net/ip.h>
#include <net/arp.h>
/*
* IP over AX.25 encapsulation.
*/
/*
* Shove an AX.25 UI header on an IP packet and handle ARP
*/
#ifdef CONFIG_INET
static int ax25_hard_header(struct sk_buff *skb, struct net_device *dev,
unsigned short type, const void *daddr,
const void *saddr, unsigned int len)
{
unsigned char *buff;
/* they sometimes come back to us... */
if (type == ETH_P_AX25)
return 0;
/* header is an AX.25 UI frame from us to them */
buff = skb_push(skb, AX25_HEADER_LEN);
*buff++ = 0x00; /* KISS DATA */
if (daddr != NULL)
memcpy(buff, daddr, dev->addr_len); /* Address specified */
buff[6] &= ~AX25_CBIT;
buff[6] &= ~AX25_EBIT;
buff[6] |= AX25_SSSID_SPARE;
buff += AX25_ADDR_LEN;
if (saddr != NULL)
memcpy(buff, saddr, dev->addr_len);
else
memcpy(buff, dev->dev_addr, dev->addr_len);
buff[6] &= ~AX25_CBIT;
buff[6] |= AX25_EBIT;
buff[6] |= AX25_SSSID_SPARE;
buff += AX25_ADDR_LEN;
*buff++ = AX25_UI; /* UI */
/* Append a suitable AX.25 PID */
switch (type) {
case ETH_P_IP:
*buff++ = AX25_P_IP;
break;
case ETH_P_ARP:
*buff++ = AX25_P_ARP;
break;
default:
printk(KERN_ERR "AX.25: ax25_hard_header - wrong protocol type 0x%2.2x\n", type);
*buff++ = 0;
break;
}
if (daddr != NULL)
return AX25_HEADER_LEN;
return -AX25_HEADER_LEN; /* Unfinished header */
}
netdev_tx_t ax25_ip_xmit(struct sk_buff *skb)
{
struct sk_buff *ourskb;
unsigned char *bp = skb->data;
ax25_route *route;
struct net_device *dev = NULL;
ax25_address *src, *dst;
ax25_digi *digipeat = NULL;
ax25_dev *ax25_dev;
ax25_cb *ax25;
char ip_mode = ' ';
dst = (ax25_address *)(bp + 1);
src = (ax25_address *)(bp + 8);
ax25_route_lock_use();
route = ax25_get_route(dst, NULL);
if (route) {
digipeat = route->digipeat;
dev = route->dev;
ip_mode = route->ip_mode;
}
if (dev == NULL)
dev = skb->dev;
rcu_read_lock();
if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) {
kfree_skb(skb);
goto put;
}
if (bp[16] == AX25_P_IP) {
if (ip_mode == 'V' || (ip_mode == ' ' && ax25_dev->values[AX25_VALUES_IPDEFMODE])) {
/*
* We copy the buffer and release the original thereby
* keeping it straight
*
* Note: we report 1 back so the caller will
* not feed the frame direct to the physical device
* We don't want that to happen. (It won't be upset
* as we have pulled the frame from the queue by
* freeing it).
*
* NB: TCP modifies buffers that are still
* on a device queue, thus we use skb_copy()
* instead of using skb_clone() unless this
* gets fixed.
*/
ax25_address src_c;
ax25_address dst_c;
if ((ourskb = skb_copy(skb, GFP_ATOMIC)) == NULL) {
kfree_skb(skb);
goto put;
}
if (skb->sk != NULL)
skb_set_owner_w(ourskb, skb->sk);
kfree_skb(skb);
/* dl9sau: bugfix
* after kfree_skb(), dst and src which were pointer
* to bp which is part of skb->data would not be valid
* anymore hope that after skb_pull(ourskb, ..) our
* dsc_c and src_c will not become invalid
*/
bp = ourskb->data;
dst_c = *(ax25_address *)(bp + 1);
src_c = *(ax25_address *)(bp + 8);
skb_pull(ourskb, AX25_HEADER_LEN - 1); /* Keep PID */
skb_reset_network_header(ourskb);
ax25=ax25_send_frame(
ourskb,
ax25_dev->values[AX25_VALUES_PACLEN],
&src_c,
&dst_c, digipeat, dev);
if (ax25) {
ax25_cb_put(ax25);
}
goto put;
}
}
bp[7] &= ~AX25_CBIT;
bp[7] &= ~AX25_EBIT;
bp[7] |= AX25_SSSID_SPARE;
bp[14] &= ~AX25_CBIT;
bp[14] |= AX25_EBIT;
bp[14] |= AX25_SSSID_SPARE;
skb_pull(skb, AX25_KISS_HEADER_LEN);
if (digipeat != NULL) {
if ((ourskb = ax25_rt_build_path(skb, src, dst, route->digipeat)) == NULL)
goto put;
skb = ourskb;
}
ax25_queue_xmit(skb, dev);
put:
rcu_read_unlock();
ax25_route_lock_unuse();
return NETDEV_TX_OK;
}
#else /* INET */
static int ax25_hard_header(struct sk_buff *skb, struct net_device *dev,
unsigned short type, const void *daddr,
const void *saddr, unsigned int len)
{
return -AX25_HEADER_LEN;
}
netdev_tx_t ax25_ip_xmit(struct sk_buff *skb)
{
kfree_skb(skb);
return NETDEV_TX_OK;
}
#endif
static bool ax25_validate_header(const char *header, unsigned int len)
{
ax25_digi digi;
if (!len)
return false;
if (header[0])
return true;
return ax25_addr_parse(header + 1, len - 1, NULL, NULL, &digi, NULL,
NULL);
}
const struct header_ops ax25_header_ops = {
.create = ax25_hard_header,
.validate = ax25_validate_header,
};
EXPORT_SYMBOL(ax25_header_ops);
EXPORT_SYMBOL(ax25_ip_xmit);

398
net/ax25/ax25_out.c
View File

@ -1,398 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
* Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/spinlock.h>
#include <linux/net.h>
#include <linux/slab.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
static DEFINE_SPINLOCK(ax25_frag_lock);
ax25_cb *ax25_send_frame(struct sk_buff *skb, int paclen, const ax25_address *src, ax25_address *dest, ax25_digi *digi, struct net_device *dev)
{
ax25_dev *ax25_dev;
ax25_cb *ax25;
/*
* Take the default packet length for the device if zero is
* specified.
*/
if (paclen == 0) {
rcu_read_lock();
ax25_dev = ax25_dev_ax25dev(dev);
if (!ax25_dev) {
rcu_read_unlock();
return NULL;
}
paclen = ax25_dev->values[AX25_VALUES_PACLEN];
rcu_read_unlock();
}
/*
* Look for an existing connection.
*/
if ((ax25 = ax25_find_cb(src, dest, digi, dev)) != NULL) {
ax25_output(ax25, paclen, skb);
return ax25; /* It already existed */
}
rcu_read_lock();
ax25_dev = ax25_dev_ax25dev(dev);
if (!ax25_dev) {
rcu_read_unlock();
return NULL;
}
if ((ax25 = ax25_create_cb()) == NULL) {
rcu_read_unlock();
return NULL;
}
ax25_fillin_cb(ax25, ax25_dev);
rcu_read_unlock();
ax25->source_addr = *src;
ax25->dest_addr = *dest;
if (digi != NULL) {
ax25->digipeat = kmemdup(digi, sizeof(*digi), GFP_ATOMIC);
if (ax25->digipeat == NULL) {
ax25_cb_put(ax25);
return NULL;
}
}
switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
case AX25_PROTO_STD_SIMPLEX:
case AX25_PROTO_STD_DUPLEX:
ax25_std_establish_data_link(ax25);
break;
#ifdef CONFIG_AX25_DAMA_SLAVE
case AX25_PROTO_DAMA_SLAVE:
if (ax25_dev->dama.slave)
ax25_ds_establish_data_link(ax25);
else
ax25_std_establish_data_link(ax25);
break;
#endif
}
/*
* There is one ref for the state machine; a caller needs
* one more to put it back, just like with the existing one.
*/
ax25_cb_hold(ax25);
ax25_cb_add(ax25);
ax25->state = AX25_STATE_1;
ax25_start_heartbeat(ax25);
ax25_output(ax25, paclen, skb);
return ax25; /* We had to create it */
}
EXPORT_SYMBOL(ax25_send_frame);
/*
* All outgoing AX.25 I frames pass via this routine. Therefore this is
* where the fragmentation of frames takes place. If fragment is set to
* zero then we are not allowed to do fragmentation, even if the frame
* is too large.
*/
void ax25_output(ax25_cb *ax25, int paclen, struct sk_buff *skb)
{
struct sk_buff *skbn;
unsigned char *p;
int frontlen, len, fragno, ka9qfrag, first = 1;
if (paclen < 16) {
WARN_ON_ONCE(1);
kfree_skb(skb);
return;
}
if ((skb->len - 1) > paclen) {
if (*skb->data == AX25_P_TEXT) {
skb_pull(skb, 1); /* skip PID */
ka9qfrag = 0;
} else {
paclen -= 2; /* Allow for fragment control info */
ka9qfrag = 1;
}
fragno = skb->len / paclen;
if (skb->len % paclen == 0) fragno--;
frontlen = skb_headroom(skb); /* Address space + CTRL */
while (skb->len > 0) {
spin_lock_bh(&ax25_frag_lock);
if ((skbn = alloc_skb(paclen + 2 + frontlen, GFP_ATOMIC)) == NULL) {
spin_unlock_bh(&ax25_frag_lock);
printk(KERN_CRIT "AX.25: ax25_output - out of memory\n");
return;
}
if (skb->sk != NULL)
skb_set_owner_w(skbn, skb->sk);
spin_unlock_bh(&ax25_frag_lock);
len = (paclen > skb->len) ? skb->len : paclen;
if (ka9qfrag == 1) {
skb_reserve(skbn, frontlen + 2);
skb_set_network_header(skbn,
skb_network_offset(skb));
skb_copy_from_linear_data(skb, skb_put(skbn, len), len);
p = skb_push(skbn, 2);
*p++ = AX25_P_SEGMENT;
*p = fragno--;
if (first) {
*p |= AX25_SEG_FIRST;
first = 0;
}
} else {
skb_reserve(skbn, frontlen + 1);
skb_set_network_header(skbn,
skb_network_offset(skb));
skb_copy_from_linear_data(skb, skb_put(skbn, len), len);
p = skb_push(skbn, 1);
*p = AX25_P_TEXT;
}
skb_pull(skb, len);
skb_queue_tail(&ax25->write_queue, skbn); /* Throw it on the queue */
}
kfree_skb(skb);
} else {
skb_queue_tail(&ax25->write_queue, skb); /* Throw it on the queue */
}
switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
case AX25_PROTO_STD_SIMPLEX:
case AX25_PROTO_STD_DUPLEX:
ax25_kick(ax25);
break;
#ifdef CONFIG_AX25_DAMA_SLAVE
/*
* A DAMA slave is _required_ to work as normal AX.25L2V2
* if no DAMA master is available.
*/
case AX25_PROTO_DAMA_SLAVE:
if (!ax25->ax25_dev->dama.slave) ax25_kick(ax25);
break;
#endif
}
}
/*
* This procedure is passed a buffer descriptor for an iframe. It builds
* the rest of the control part of the frame and then writes it out.
*/
static void ax25_send_iframe(ax25_cb *ax25, struct sk_buff *skb, int poll_bit)
{
unsigned char *frame;
if (skb == NULL)
return;
skb_reset_network_header(skb);
if (ax25->modulus == AX25_MODULUS) {
frame = skb_push(skb, 1);
*frame = AX25_I;
*frame |= (poll_bit) ? AX25_PF : 0;
*frame |= (ax25->vr << 5);
*frame |= (ax25->vs << 1);
} else {
frame = skb_push(skb, 2);
frame[0] = AX25_I;
frame[0] |= (ax25->vs << 1);
frame[1] = (poll_bit) ? AX25_EPF : 0;
frame[1] |= (ax25->vr << 1);
}
ax25_start_idletimer(ax25);
ax25_transmit_buffer(ax25, skb, AX25_COMMAND);
}
void ax25_kick(ax25_cb *ax25)
{
struct sk_buff *skb, *skbn;
int last = 1;
unsigned short start, end, next;
if (ax25->state != AX25_STATE_3 && ax25->state != AX25_STATE_4)
return;
if (ax25->condition & AX25_COND_PEER_RX_BUSY)
return;
if (skb_peek(&ax25->write_queue) == NULL)
return;
start = (skb_peek(&ax25->ack_queue) == NULL) ? ax25->va : ax25->vs;
end = (ax25->va + ax25->window) % ax25->modulus;
if (start == end)
return;
/*
* Transmit data until either we're out of data to send or
* the window is full. Send a poll on the final I frame if
* the window is filled.
*/
/*
* Dequeue the frame and copy it.
* Check for race with ax25_clear_queues().
*/
skb = skb_dequeue(&ax25->write_queue);
if (!skb)
return;
ax25->vs = start;
do {
if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
skb_queue_head(&ax25->write_queue, skb);
break;
}
if (skb->sk != NULL)
skb_set_owner_w(skbn, skb->sk);
next = (ax25->vs + 1) % ax25->modulus;
last = (next == end);
/*
* Transmit the frame copy.
* bke 960114: do not set the Poll bit on the last frame
* in DAMA mode.
*/
switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
case AX25_PROTO_STD_SIMPLEX:
case AX25_PROTO_STD_DUPLEX:
ax25_send_iframe(ax25, skbn, (last) ? AX25_POLLON : AX25_POLLOFF);
break;
#ifdef CONFIG_AX25_DAMA_SLAVE
case AX25_PROTO_DAMA_SLAVE:
ax25_send_iframe(ax25, skbn, AX25_POLLOFF);
break;
#endif
}
ax25->vs = next;
/*
* Requeue the original data frame.
*/
skb_queue_tail(&ax25->ack_queue, skb);
} while (!last && (skb = skb_dequeue(&ax25->write_queue)) != NULL);
ax25->condition &= ~AX25_COND_ACK_PENDING;
if (!ax25_t1timer_running(ax25)) {
ax25_stop_t3timer(ax25);
ax25_calculate_t1(ax25);
ax25_start_t1timer(ax25);
}
}
void ax25_transmit_buffer(ax25_cb *ax25, struct sk_buff *skb, int type)
{
unsigned char *ptr;
int headroom;
if (ax25->ax25_dev == NULL) {
ax25_disconnect(ax25, ENETUNREACH);
return;
}
headroom = ax25_addr_size(ax25->digipeat);
if (unlikely(skb_headroom(skb) < headroom)) {
skb = skb_expand_head(skb, headroom);
if (!skb) {
printk(KERN_CRIT "AX.25: ax25_transmit_buffer - out of memory\n");
return;
}
}
ptr = skb_push(skb, headroom);
ax25_addr_build(ptr, &ax25->source_addr, &ax25->dest_addr, ax25->digipeat, type, ax25->modulus);
ax25_queue_xmit(skb, ax25->ax25_dev->dev);
}
/*
* A small shim to dev_queue_xmit to add the KISS control byte, and do
* any packet forwarding in operation.
*/
void ax25_queue_xmit(struct sk_buff *skb, struct net_device *dev)
{
unsigned char *ptr;
rcu_read_lock();
skb->protocol = ax25_type_trans(skb, ax25_fwd_dev(dev));
rcu_read_unlock();
ptr = skb_push(skb, 1);
*ptr = 0x00; /* KISS */
dev_queue_xmit(skb);
}
int ax25_check_iframes_acked(ax25_cb *ax25, unsigned short nr)
{
if (ax25->vs == nr) {
ax25_frames_acked(ax25, nr);
ax25_calculate_rtt(ax25);
ax25_stop_t1timer(ax25);
ax25_start_t3timer(ax25);
return 1;
} else {
if (ax25->va != nr) {
ax25_frames_acked(ax25, nr);
ax25_calculate_t1(ax25);
ax25_start_t1timer(ax25);
return 1;
}
}
return 0;
}

416
net/ax25/ax25_route.c
View File

@ -1,416 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
* Copyright (C) Steven Whitehouse GW7RRM (stevew@acm.org)
* Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
* Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de)
* Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
*/
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/timer.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/slab.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/seq_file.h>
#include <linux/export.h>
static ax25_route *ax25_route_list;
DEFINE_RWLOCK(ax25_route_lock);
void ax25_rt_device_down(struct net_device *dev)
{
ax25_route *s, *t, *ax25_rt;
write_lock_bh(&ax25_route_lock);
ax25_rt = ax25_route_list;
while (ax25_rt != NULL) {
s = ax25_rt;
ax25_rt = ax25_rt->next;
if (s->dev == dev) {
if (ax25_route_list == s) {
ax25_route_list = s->next;
kfree(s->digipeat);
kfree(s);
} else {
for (t = ax25_route_list; t != NULL; t = t->next) {
if (t->next == s) {
t->next = s->next;
kfree(s->digipeat);
kfree(s);
break;
}
}
}
}
}
write_unlock_bh(&ax25_route_lock);
}
static int __must_check ax25_rt_add(struct ax25_routes_struct *route)
{
ax25_route *ax25_rt;
ax25_dev *ax25_dev;
int i;
if (route->digi_count > AX25_MAX_DIGIS)
return -EINVAL;
ax25_dev = ax25_addr_ax25dev(&route->port_addr);
if (!ax25_dev)
return -EINVAL;
write_lock_bh(&ax25_route_lock);
ax25_rt = ax25_route_list;
while (ax25_rt != NULL) {
if (ax25cmp(&ax25_rt->callsign, &route->dest_addr) == 0 &&
ax25_rt->dev == ax25_dev->dev) {
kfree(ax25_rt->digipeat);
ax25_rt->digipeat = NULL;
if (route->digi_count != 0) {
if ((ax25_rt->digipeat = kmalloc_obj(ax25_digi, GFP_ATOMIC)) == NULL) {
write_unlock_bh(&ax25_route_lock);
ax25_dev_put(ax25_dev);
return -ENOMEM;
}
ax25_rt->digipeat->lastrepeat = -1;
ax25_rt->digipeat->ndigi = route->digi_count;
for (i = 0; i < route->digi_count; i++) {
ax25_rt->digipeat->repeated[i] = 0;
ax25_rt->digipeat->calls[i] = route->digi_addr[i];
}
}
write_unlock_bh(&ax25_route_lock);
ax25_dev_put(ax25_dev);
return 0;
}
ax25_rt = ax25_rt->next;
}
if ((ax25_rt = kmalloc_obj(ax25_route, GFP_ATOMIC)) == NULL) {
write_unlock_bh(&ax25_route_lock);
ax25_dev_put(ax25_dev);
return -ENOMEM;
}
ax25_rt->callsign = route->dest_addr;
ax25_rt->dev = ax25_dev->dev;
ax25_rt->digipeat = NULL;
ax25_rt->ip_mode = ' ';
if (route->digi_count != 0) {
if ((ax25_rt->digipeat = kmalloc_obj(ax25_digi, GFP_ATOMIC)) == NULL) {
write_unlock_bh(&ax25_route_lock);
kfree(ax25_rt);
ax25_dev_put(ax25_dev);
return -ENOMEM;
}
ax25_rt->digipeat->lastrepeat = -1;
ax25_rt->digipeat->ndigi = route->digi_count;
for (i = 0; i < route->digi_count; i++) {
ax25_rt->digipeat->repeated[i] = 0;
ax25_rt->digipeat->calls[i] = route->digi_addr[i];
}
}
ax25_rt->next = ax25_route_list;
ax25_route_list = ax25_rt;
write_unlock_bh(&ax25_route_lock);
ax25_dev_put(ax25_dev);
return 0;
}
void __ax25_put_route(ax25_route *ax25_rt)
{
kfree(ax25_rt->digipeat);
kfree(ax25_rt);
}
static int ax25_rt_del(struct ax25_routes_struct *route)
{
ax25_route *s, *t, *ax25_rt;
ax25_dev *ax25_dev;
if ((ax25_dev = ax25_addr_ax25dev(&route->port_addr)) == NULL)
return -EINVAL;
write_lock_bh(&ax25_route_lock);
ax25_rt = ax25_route_list;
while (ax25_rt != NULL) {
s = ax25_rt;
ax25_rt = ax25_rt->next;
if (s->dev == ax25_dev->dev &&
ax25cmp(&route->dest_addr, &s->callsign) == 0) {
if (ax25_route_list == s) {
ax25_route_list = s->next;
__ax25_put_route(s);
} else {
for (t = ax25_route_list; t != NULL; t = t->next) {
if (t->next == s) {
t->next = s->next;
__ax25_put_route(s);
break;
}
}
}
}
}
write_unlock_bh(&ax25_route_lock);
ax25_dev_put(ax25_dev);
return 0;
}
static int ax25_rt_opt(struct ax25_route_opt_struct *rt_option)
{
ax25_route *ax25_rt;
ax25_dev *ax25_dev;
int err = 0;
if ((ax25_dev = ax25_addr_ax25dev(&rt_option->port_addr)) == NULL)
return -EINVAL;
write_lock_bh(&ax25_route_lock);
ax25_rt = ax25_route_list;
while (ax25_rt != NULL) {
if (ax25_rt->dev == ax25_dev->dev &&
ax25cmp(&rt_option->dest_addr, &ax25_rt->callsign) == 0) {
switch (rt_option->cmd) {
case AX25_SET_RT_IPMODE:
switch (rt_option->arg) {
case ' ':
case 'D':
case 'V':
ax25_rt->ip_mode = rt_option->arg;
break;
default:
err = -EINVAL;
goto out;
}
break;
default:
err = -EINVAL;
goto out;
}
}
ax25_rt = ax25_rt->next;
}
out:
write_unlock_bh(&ax25_route_lock);
ax25_dev_put(ax25_dev);
return err;
}
int ax25_rt_ioctl(unsigned int cmd, void __user *arg)
{
struct ax25_route_opt_struct rt_option;
struct ax25_routes_struct route;
switch (cmd) {
case SIOCADDRT:
if (copy_from_user(&route, arg, sizeof(route)))
return -EFAULT;
return ax25_rt_add(&route);
case SIOCDELRT:
if (copy_from_user(&route, arg, sizeof(route)))
return -EFAULT;
return ax25_rt_del(&route);
case SIOCAX25OPTRT:
if (copy_from_user(&rt_option, arg, sizeof(rt_option)))
return -EFAULT;
return ax25_rt_opt(&rt_option);
default:
return -EINVAL;
}
}
#ifdef CONFIG_PROC_FS
static void *ax25_rt_seq_start(struct seq_file *seq, loff_t *pos)
__acquires(ax25_route_lock)
{
struct ax25_route *ax25_rt;
int i = 1;
read_lock(&ax25_route_lock);
if (*pos == 0)
return SEQ_START_TOKEN;
for (ax25_rt = ax25_route_list; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
if (i == *pos)
return ax25_rt;
++i;
}
return NULL;
}
static void *ax25_rt_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
++*pos;
return (v == SEQ_START_TOKEN) ? ax25_route_list :
((struct ax25_route *) v)->next;
}
static void ax25_rt_seq_stop(struct seq_file *seq, void *v)
__releases(ax25_route_lock)
{
read_unlock(&ax25_route_lock);
}
static int ax25_rt_seq_show(struct seq_file *seq, void *v)
{
char buf[11];
if (v == SEQ_START_TOKEN)
seq_puts(seq, "callsign dev mode digipeaters\n");
else {
struct ax25_route *ax25_rt = v;
const char *callsign;
int i;
if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0)
callsign = "default";
else
callsign = ax2asc(buf, &ax25_rt->callsign);
seq_printf(seq, "%-9s %-4s",
callsign,
ax25_rt->dev ? ax25_rt->dev->name : "???");
switch (ax25_rt->ip_mode) {
case 'V':
seq_puts(seq, " vc");
break;
case 'D':
seq_puts(seq, " dg");
break;
default:
seq_puts(seq, " *");
break;
}
if (ax25_rt->digipeat != NULL)
for (i = 0; i < ax25_rt->digipeat->ndigi; i++)
seq_printf(seq, " %s",
ax2asc(buf, &ax25_rt->digipeat->calls[i]));
seq_puts(seq, "\n");
}
return 0;
}
const struct seq_operations ax25_rt_seqops = {
.start = ax25_rt_seq_start,
.next = ax25_rt_seq_next,
.stop = ax25_rt_seq_stop,
.show = ax25_rt_seq_show,
};
#endif
/*
* Find AX.25 route
*
* Only routes with a reference count of zero can be destroyed.
* Must be called with ax25_route_lock read locked.
*/
ax25_route *ax25_get_route(ax25_address *addr, struct net_device *dev)
{
ax25_route *ax25_spe_rt = NULL;
ax25_route *ax25_def_rt = NULL;
ax25_route *ax25_rt;
/*
* Bind to the physical interface we heard them on, or the default
* route if none is found;
*/
for (ax25_rt = ax25_route_list; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
if (dev == NULL) {
if (ax25cmp(&ax25_rt->callsign, addr) == 0 && ax25_rt->dev != NULL)
ax25_spe_rt = ax25_rt;
if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0 && ax25_rt->dev != NULL)
ax25_def_rt = ax25_rt;
} else {
if (ax25cmp(&ax25_rt->callsign, addr) == 0 && ax25_rt->dev == dev)
ax25_spe_rt = ax25_rt;
if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0 && ax25_rt->dev == dev)
ax25_def_rt = ax25_rt;
}
}
ax25_rt = ax25_def_rt;
if (ax25_spe_rt != NULL)
ax25_rt = ax25_spe_rt;
return ax25_rt;
}
struct sk_buff *ax25_rt_build_path(struct sk_buff *skb, ax25_address *src,
ax25_address *dest, ax25_digi *digi)
{
unsigned char *bp;
int len;
len = digi->ndigi * AX25_ADDR_LEN;
if (unlikely(skb_headroom(skb) < len)) {
skb = skb_expand_head(skb, len);
if (!skb) {
printk(KERN_CRIT "AX.25: ax25_dg_build_path - out of memory\n");
return NULL;
}
}
bp = skb_push(skb, len);
ax25_addr_build(bp, src, dest, digi, AX25_COMMAND, AX25_MODULUS);
return skb;
}
/*
* Free all memory associated with routing structures.
*/
void __exit ax25_rt_free(void)
{
ax25_route *s, *ax25_rt = ax25_route_list;
write_lock_bh(&ax25_route_lock);
while (ax25_rt != NULL) {
s = ax25_rt;
ax25_rt = ax25_rt->next;
kfree(s->digipeat);
kfree(s);
}
write_unlock_bh(&ax25_route_lock);
}

443
net/ax25/ax25_std_in.c
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@ -1,443 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
* Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
* Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de)
*
* Most of this code is based on the SDL diagrams published in the 7th ARRL
* Computer Networking Conference papers. The diagrams have mistakes in them,
* but are mostly correct. Before you modify the code could you read the SDL
* diagrams as the code is not obvious and probably very easy to break.
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
/*
* State machine for state 1, Awaiting Connection State.
* The handling of the timer(s) is in file ax25_std_timer.c.
* Handling of state 0 and connection release is in ax25.c.
*/
static int ax25_std_state1_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int pf, int type)
{
switch (frametype) {
case AX25_SABM:
ax25->modulus = AX25_MODULUS;
ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
break;
case AX25_SABME:
ax25->modulus = AX25_EMODULUS;
ax25->window = ax25->ax25_dev->values[AX25_VALUES_EWINDOW];
ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
break;
case AX25_DISC:
ax25_send_control(ax25, AX25_DM, pf, AX25_RESPONSE);
break;
case AX25_UA:
if (pf) {
ax25_calculate_rtt(ax25);
ax25_stop_t1timer(ax25);
ax25_start_t3timer(ax25);
ax25_start_idletimer(ax25);
ax25->vs = 0;
ax25->va = 0;
ax25->vr = 0;
ax25->state = AX25_STATE_3;
ax25->n2count = 0;
if (ax25->sk != NULL) {
bh_lock_sock(ax25->sk);
ax25->sk->sk_state = TCP_ESTABLISHED;
/* For WAIT_SABM connections we will produce an accept ready socket here */
if (!sock_flag(ax25->sk, SOCK_DEAD))
ax25->sk->sk_state_change(ax25->sk);
bh_unlock_sock(ax25->sk);
}
}
break;
case AX25_DM:
if (pf) {
if (ax25->modulus == AX25_MODULUS) {
ax25_disconnect(ax25, ECONNREFUSED);
} else {
ax25->modulus = AX25_MODULUS;
ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
}
}
break;
default:
break;
}
return 0;
}
/*
* State machine for state 2, Awaiting Release State.
* The handling of the timer(s) is in file ax25_std_timer.c
* Handling of state 0 and connection release is in ax25.c.
*/
static int ax25_std_state2_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int pf, int type)
{
switch (frametype) {
case AX25_SABM:
case AX25_SABME:
ax25_send_control(ax25, AX25_DM, pf, AX25_RESPONSE);
break;
case AX25_DISC:
ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
ax25_disconnect(ax25, 0);
break;
case AX25_DM:
case AX25_UA:
if (pf)
ax25_disconnect(ax25, 0);
break;
case AX25_I:
case AX25_REJ:
case AX25_RNR:
case AX25_RR:
if (pf) ax25_send_control(ax25, AX25_DM, AX25_POLLON, AX25_RESPONSE);
break;
default:
break;
}
return 0;
}
/*
* State machine for state 3, Connected State.
* The handling of the timer(s) is in file ax25_std_timer.c
* Handling of state 0 and connection release is in ax25.c.
*/
static int ax25_std_state3_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int ns, int nr, int pf, int type)
{
int queued = 0;
switch (frametype) {
case AX25_SABM:
case AX25_SABME:
if (frametype == AX25_SABM) {
ax25->modulus = AX25_MODULUS;
ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
} else {
ax25->modulus = AX25_EMODULUS;
ax25->window = ax25->ax25_dev->values[AX25_VALUES_EWINDOW];
}
ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
ax25_stop_t1timer(ax25);
ax25_stop_t2timer(ax25);
ax25_start_t3timer(ax25);
ax25_start_idletimer(ax25);
ax25->condition = 0x00;
ax25->vs = 0;
ax25->va = 0;
ax25->vr = 0;
ax25_requeue_frames(ax25);
break;
case AX25_DISC:
ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
ax25_disconnect(ax25, 0);
break;
case AX25_DM:
ax25_disconnect(ax25, ECONNRESET);
break;
case AX25_RR:
case AX25_RNR:
if (frametype == AX25_RR)
ax25->condition &= ~AX25_COND_PEER_RX_BUSY;
else
ax25->condition |= AX25_COND_PEER_RX_BUSY;
if (type == AX25_COMMAND && pf)
ax25_std_enquiry_response(ax25);
if (ax25_validate_nr(ax25, nr)) {
ax25_check_iframes_acked(ax25, nr);
} else {
ax25_std_nr_error_recovery(ax25);
ax25->state = AX25_STATE_1;
}
break;
case AX25_REJ:
ax25->condition &= ~AX25_COND_PEER_RX_BUSY;
if (type == AX25_COMMAND && pf)
ax25_std_enquiry_response(ax25);
if (ax25_validate_nr(ax25, nr)) {
ax25_frames_acked(ax25, nr);
ax25_calculate_rtt(ax25);
ax25_stop_t1timer(ax25);
ax25_start_t3timer(ax25);
ax25_requeue_frames(ax25);
} else {
ax25_std_nr_error_recovery(ax25);
ax25->state = AX25_STATE_1;
}
break;
case AX25_I:
if (!ax25_validate_nr(ax25, nr)) {
ax25_std_nr_error_recovery(ax25);
ax25->state = AX25_STATE_1;
break;
}
if (ax25->condition & AX25_COND_PEER_RX_BUSY) {
ax25_frames_acked(ax25, nr);
} else {
ax25_check_iframes_acked(ax25, nr);
}
if (ax25->condition & AX25_COND_OWN_RX_BUSY) {
if (pf) ax25_std_enquiry_response(ax25);
break;
}
if (ns == ax25->vr) {
ax25->vr = (ax25->vr + 1) % ax25->modulus;
queued = ax25_rx_iframe(ax25, skb);
if (ax25->condition & AX25_COND_OWN_RX_BUSY)
ax25->vr = ns; /* ax25->vr - 1 */
ax25->condition &= ~AX25_COND_REJECT;
if (pf) {
ax25_std_enquiry_response(ax25);
} else {
if (!(ax25->condition & AX25_COND_ACK_PENDING)) {
ax25->condition |= AX25_COND_ACK_PENDING;
ax25_start_t2timer(ax25);
}
}
} else {
if (ax25->condition & AX25_COND_REJECT) {
if (pf) ax25_std_enquiry_response(ax25);
} else {
ax25->condition |= AX25_COND_REJECT;
ax25_send_control(ax25, AX25_REJ, pf, AX25_RESPONSE);
ax25->condition &= ~AX25_COND_ACK_PENDING;
}
}
break;
case AX25_FRMR:
case AX25_ILLEGAL:
ax25_std_establish_data_link(ax25);
ax25->state = AX25_STATE_1;
break;
default:
break;
}
return queued;
}
/*
* State machine for state 4, Timer Recovery State.
* The handling of the timer(s) is in file ax25_std_timer.c
* Handling of state 0 and connection release is in ax25.c.
*/
static int ax25_std_state4_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int ns, int nr, int pf, int type)
{
int queued = 0;
switch (frametype) {
case AX25_SABM:
case AX25_SABME:
if (frametype == AX25_SABM) {
ax25->modulus = AX25_MODULUS;
ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
} else {
ax25->modulus = AX25_EMODULUS;
ax25->window = ax25->ax25_dev->values[AX25_VALUES_EWINDOW];
}
ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
ax25_stop_t1timer(ax25);
ax25_stop_t2timer(ax25);
ax25_start_t3timer(ax25);
ax25_start_idletimer(ax25);
ax25->condition = 0x00;
ax25->vs = 0;
ax25->va = 0;
ax25->vr = 0;
ax25->state = AX25_STATE_3;
ax25->n2count = 0;
ax25_requeue_frames(ax25);
break;
case AX25_DISC:
ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
ax25_disconnect(ax25, 0);
break;
case AX25_DM:
ax25_disconnect(ax25, ECONNRESET);
break;
case AX25_RR:
case AX25_RNR:
if (frametype == AX25_RR)
ax25->condition &= ~AX25_COND_PEER_RX_BUSY;
else
ax25->condition |= AX25_COND_PEER_RX_BUSY;
if (type == AX25_RESPONSE && pf) {
ax25_stop_t1timer(ax25);
ax25->n2count = 0;
if (ax25_validate_nr(ax25, nr)) {
ax25_frames_acked(ax25, nr);
if (ax25->vs == ax25->va) {
ax25_start_t3timer(ax25);
ax25->state = AX25_STATE_3;
} else {
ax25_requeue_frames(ax25);
}
} else {
ax25_std_nr_error_recovery(ax25);
ax25->state = AX25_STATE_1;
}
break;
}
if (type == AX25_COMMAND && pf)
ax25_std_enquiry_response(ax25);
if (ax25_validate_nr(ax25, nr)) {
ax25_frames_acked(ax25, nr);
} else {
ax25_std_nr_error_recovery(ax25);
ax25->state = AX25_STATE_1;
}
break;
case AX25_REJ:
ax25->condition &= ~AX25_COND_PEER_RX_BUSY;
if (pf && type == AX25_RESPONSE) {
ax25_stop_t1timer(ax25);
ax25->n2count = 0;
if (ax25_validate_nr(ax25, nr)) {
ax25_frames_acked(ax25, nr);
if (ax25->vs == ax25->va) {
ax25_start_t3timer(ax25);
ax25->state = AX25_STATE_3;
} else {
ax25_requeue_frames(ax25);
}
} else {
ax25_std_nr_error_recovery(ax25);
ax25->state = AX25_STATE_1;
}
break;
}
if (type == AX25_COMMAND && pf)
ax25_std_enquiry_response(ax25);
if (ax25_validate_nr(ax25, nr)) {
ax25_frames_acked(ax25, nr);
ax25_requeue_frames(ax25);
} else {
ax25_std_nr_error_recovery(ax25);
ax25->state = AX25_STATE_1;
}
break;
case AX25_I:
if (!ax25_validate_nr(ax25, nr)) {
ax25_std_nr_error_recovery(ax25);
ax25->state = AX25_STATE_1;
break;
}
ax25_frames_acked(ax25, nr);
if (ax25->condition & AX25_COND_OWN_RX_BUSY) {
if (pf)
ax25_std_enquiry_response(ax25);
break;
}
if (ns == ax25->vr) {
ax25->vr = (ax25->vr + 1) % ax25->modulus;
queued = ax25_rx_iframe(ax25, skb);
if (ax25->condition & AX25_COND_OWN_RX_BUSY)
ax25->vr = ns; /* ax25->vr - 1 */
ax25->condition &= ~AX25_COND_REJECT;
if (pf) {
ax25_std_enquiry_response(ax25);
} else {
if (!(ax25->condition & AX25_COND_ACK_PENDING)) {
ax25->condition |= AX25_COND_ACK_PENDING;
ax25_start_t2timer(ax25);
}
}
} else {
if (ax25->condition & AX25_COND_REJECT) {
if (pf) ax25_std_enquiry_response(ax25);
} else {
ax25->condition |= AX25_COND_REJECT;
ax25_send_control(ax25, AX25_REJ, pf, AX25_RESPONSE);
ax25->condition &= ~AX25_COND_ACK_PENDING;
}
}
break;
case AX25_FRMR:
case AX25_ILLEGAL:
ax25_std_establish_data_link(ax25);
ax25->state = AX25_STATE_1;
break;
default:
break;
}
return queued;
}
/*
* Higher level upcall for a LAPB frame
*/
int ax25_std_frame_in(ax25_cb *ax25, struct sk_buff *skb, int type)
{
int queued = 0, frametype, ns, nr, pf;
frametype = ax25_decode(ax25, skb, &ns, &nr, &pf);
switch (ax25->state) {
case AX25_STATE_1:
queued = ax25_std_state1_machine(ax25, skb, frametype, pf, type);
break;
case AX25_STATE_2:
queued = ax25_std_state2_machine(ax25, skb, frametype, pf, type);
break;
case AX25_STATE_3:
queued = ax25_std_state3_machine(ax25, skb, frametype, ns, nr, pf, type);
break;
case AX25_STATE_4:
queued = ax25_std_state4_machine(ax25, skb, frametype, ns, nr, pf, type);
break;
}
ax25_kick(ax25);
return queued;
}

83
net/ax25/ax25_std_subr.c
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@ -1,83 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
/*
* The following routines are taken from page 170 of the 7th ARRL Computer
* Networking Conference paper, as is the whole state machine.
*/
void ax25_std_nr_error_recovery(ax25_cb *ax25)
{
ax25_std_establish_data_link(ax25);
}
void ax25_std_establish_data_link(ax25_cb *ax25)
{
ax25->condition = 0x00;
ax25->n2count = 0;
if (ax25->modulus == AX25_MODULUS)
ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
else
ax25_send_control(ax25, AX25_SABME, AX25_POLLON, AX25_COMMAND);
ax25_calculate_t1(ax25);
ax25_stop_idletimer(ax25);
ax25_stop_t3timer(ax25);
ax25_stop_t2timer(ax25);
ax25_start_t1timer(ax25);
}
void ax25_std_transmit_enquiry(ax25_cb *ax25)
{
if (ax25->condition & AX25_COND_OWN_RX_BUSY)
ax25_send_control(ax25, AX25_RNR, AX25_POLLON, AX25_COMMAND);
else
ax25_send_control(ax25, AX25_RR, AX25_POLLON, AX25_COMMAND);
ax25->condition &= ~AX25_COND_ACK_PENDING;
ax25_calculate_t1(ax25);
ax25_start_t1timer(ax25);
}
void ax25_std_enquiry_response(ax25_cb *ax25)
{
if (ax25->condition & AX25_COND_OWN_RX_BUSY)
ax25_send_control(ax25, AX25_RNR, AX25_POLLON, AX25_RESPONSE);
else
ax25_send_control(ax25, AX25_RR, AX25_POLLON, AX25_RESPONSE);
ax25->condition &= ~AX25_COND_ACK_PENDING;
}
void ax25_std_timeout_response(ax25_cb *ax25)
{
if (ax25->condition & AX25_COND_OWN_RX_BUSY)
ax25_send_control(ax25, AX25_RNR, AX25_POLLOFF, AX25_RESPONSE);
else
ax25_send_control(ax25, AX25_RR, AX25_POLLOFF, AX25_RESPONSE);
ax25->condition &= ~AX25_COND_ACK_PENDING;
}

175
net/ax25/ax25_std_timer.c
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@ -1,175 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
* Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
* Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
void ax25_std_heartbeat_expiry(ax25_cb *ax25)
{
struct sock *sk = ax25->sk;
if (sk)
bh_lock_sock(sk);
switch (ax25->state) {
case AX25_STATE_0:
case AX25_STATE_2:
/* Magic here: If we listen() and a new link dies before it
is accepted() it isn't 'dead' so doesn't get removed. */
if (!sk || sock_flag(sk, SOCK_DESTROY) ||
(sk->sk_state == TCP_LISTEN &&
sock_flag(sk, SOCK_DEAD))) {
if (sk) {
sock_hold(sk);
ax25_destroy_socket(ax25);
bh_unlock_sock(sk);
/* Ungrab socket and destroy it */
sock_put(sk);
} else
ax25_destroy_socket(ax25);
return;
}
break;
case AX25_STATE_3:
case AX25_STATE_4:
/*
* Check the state of the receive buffer.
*/
if (sk != NULL) {
if (atomic_read(&sk->sk_rmem_alloc) <
(sk->sk_rcvbuf >> 1) &&
(ax25->condition & AX25_COND_OWN_RX_BUSY)) {
ax25->condition &= ~AX25_COND_OWN_RX_BUSY;
ax25->condition &= ~AX25_COND_ACK_PENDING;
ax25_send_control(ax25, AX25_RR, AX25_POLLOFF, AX25_RESPONSE);
break;
}
}
}
if (sk)
bh_unlock_sock(sk);
ax25_start_heartbeat(ax25);
}
void ax25_std_t2timer_expiry(ax25_cb *ax25)
{
if (ax25->condition & AX25_COND_ACK_PENDING) {
ax25->condition &= ~AX25_COND_ACK_PENDING;
ax25_std_timeout_response(ax25);
}
}
void ax25_std_t3timer_expiry(ax25_cb *ax25)
{
ax25->n2count = 0;
ax25_std_transmit_enquiry(ax25);
ax25->state = AX25_STATE_4;
}
void ax25_std_idletimer_expiry(ax25_cb *ax25)
{
ax25_clear_queues(ax25);
ax25->n2count = 0;
ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
ax25->state = AX25_STATE_2;
ax25_calculate_t1(ax25);
ax25_start_t1timer(ax25);
ax25_stop_t2timer(ax25);
ax25_stop_t3timer(ax25);
if (ax25->sk != NULL) {
bh_lock_sock(ax25->sk);
ax25->sk->sk_state = TCP_CLOSE;
ax25->sk->sk_err = 0;
ax25->sk->sk_shutdown |= SEND_SHUTDOWN;
if (!sock_flag(ax25->sk, SOCK_DEAD)) {
ax25->sk->sk_state_change(ax25->sk);
sock_set_flag(ax25->sk, SOCK_DEAD);
}
bh_unlock_sock(ax25->sk);
}
}
void ax25_std_t1timer_expiry(ax25_cb *ax25)
{
switch (ax25->state) {
case AX25_STATE_1:
if (ax25->n2count == ax25->n2) {
if (ax25->modulus == AX25_MODULUS) {
ax25_disconnect(ax25, ETIMEDOUT);
return;
} else {
ax25->modulus = AX25_MODULUS;
ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
ax25->n2count = 0;
ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
}
} else {
ax25->n2count++;
if (ax25->modulus == AX25_MODULUS)
ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
else
ax25_send_control(ax25, AX25_SABME, AX25_POLLON, AX25_COMMAND);
}
break;
case AX25_STATE_2:
if (ax25->n2count == ax25->n2) {
ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
if (!sock_flag(ax25->sk, SOCK_DESTROY))
ax25_disconnect(ax25, ETIMEDOUT);
return;
} else {
ax25->n2count++;
ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
}
break;
case AX25_STATE_3:
ax25->n2count = 1;
ax25_std_transmit_enquiry(ax25);
ax25->state = AX25_STATE_4;
break;
case AX25_STATE_4:
if (ax25->n2count == ax25->n2) {
ax25_send_control(ax25, AX25_DM, AX25_POLLON, AX25_RESPONSE);
ax25_disconnect(ax25, ETIMEDOUT);
return;
} else {
ax25->n2count++;
ax25_std_transmit_enquiry(ax25);
}
break;
}
ax25_calculate_t1(ax25);
ax25_start_t1timer(ax25);
}

296
net/ax25/ax25_subr.c
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@ -1,296 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
* Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
* Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/slab.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
/*
* This routine purges all the queues of frames.
*/
void ax25_clear_queues(ax25_cb *ax25)
{
skb_queue_purge(&ax25->write_queue);
skb_queue_purge(&ax25->ack_queue);
skb_queue_purge(&ax25->reseq_queue);
skb_queue_purge(&ax25->frag_queue);
}
/*
* This routine purges the input queue of those frames that have been
* acknowledged. This replaces the boxes labelled "V(a) <- N(r)" on the
* SDL diagram.
*/
void ax25_frames_acked(ax25_cb *ax25, unsigned short nr)
{
struct sk_buff *skb;
/*
* Remove all the ack-ed frames from the ack queue.
*/
if (ax25->va != nr) {
while (skb_peek(&ax25->ack_queue) != NULL && ax25->va != nr) {
skb = skb_dequeue(&ax25->ack_queue);
kfree_skb(skb);
ax25->va = (ax25->va + 1) % ax25->modulus;
}
}
}
void ax25_requeue_frames(ax25_cb *ax25)
{
struct sk_buff *skb;
/*
* Requeue all the un-ack-ed frames on the output queue to be picked
* up by ax25_kick called from the timer. This arrangement handles the
* possibility of an empty output queue.
*/
while ((skb = skb_dequeue_tail(&ax25->ack_queue)) != NULL)
skb_queue_head(&ax25->write_queue, skb);
}
/*
* Validate that the value of nr is between va and vs. Return true or
* false for testing.
*/
int ax25_validate_nr(ax25_cb *ax25, unsigned short nr)
{
unsigned short vc = ax25->va;
while (vc != ax25->vs) {
if (nr == vc) return 1;
vc = (vc + 1) % ax25->modulus;
}
if (nr == ax25->vs) return 1;
return 0;
}
/*
* This routine is the centralised routine for parsing the control
* information for the different frame formats.
*/
int ax25_decode(ax25_cb *ax25, struct sk_buff *skb, int *ns, int *nr, int *pf)
{
unsigned char *frame;
int frametype = AX25_ILLEGAL;
frame = skb->data;
*ns = *nr = *pf = 0;
if (ax25->modulus == AX25_MODULUS) {
if ((frame[0] & AX25_S) == 0) {
frametype = AX25_I; /* I frame - carries NR/NS/PF */
*ns = (frame[0] >> 1) & 0x07;
*nr = (frame[0] >> 5) & 0x07;
*pf = frame[0] & AX25_PF;
} else if ((frame[0] & AX25_U) == 1) { /* S frame - take out PF/NR */
frametype = frame[0] & 0x0F;
*nr = (frame[0] >> 5) & 0x07;
*pf = frame[0] & AX25_PF;
} else if ((frame[0] & AX25_U) == 3) { /* U frame - take out PF */
frametype = frame[0] & ~AX25_PF;
*pf = frame[0] & AX25_PF;
}
skb_pull(skb, 1);
} else {
if ((frame[0] & AX25_S) == 0) {
frametype = AX25_I; /* I frame - carries NR/NS/PF */
*ns = (frame[0] >> 1) & 0x7F;
*nr = (frame[1] >> 1) & 0x7F;
*pf = frame[1] & AX25_EPF;
skb_pull(skb, 2);
} else if ((frame[0] & AX25_U) == 1) { /* S frame - take out PF/NR */
frametype = frame[0] & 0x0F;
*nr = (frame[1] >> 1) & 0x7F;
*pf = frame[1] & AX25_EPF;
skb_pull(skb, 2);
} else if ((frame[0] & AX25_U) == 3) { /* U frame - take out PF */
frametype = frame[0] & ~AX25_PF;
*pf = frame[0] & AX25_PF;
skb_pull(skb, 1);
}
}
return frametype;
}
/*
* This routine is called when the HDLC layer internally generates a
* command or response for the remote machine ( eg. RR, UA etc. ).
* Only supervisory or unnumbered frames are processed.
*/
void ax25_send_control(ax25_cb *ax25, int frametype, int poll_bit, int type)
{
struct sk_buff *skb;
unsigned char *dptr;
if ((skb = alloc_skb(ax25->ax25_dev->dev->hard_header_len + 2, GFP_ATOMIC)) == NULL)
return;
skb_reserve(skb, ax25->ax25_dev->dev->hard_header_len);
skb_reset_network_header(skb);
/* Assume a response - address structure for DTE */
if (ax25->modulus == AX25_MODULUS) {
dptr = skb_put(skb, 1);
*dptr = frametype;
*dptr |= (poll_bit) ? AX25_PF : 0;
if ((frametype & AX25_U) == AX25_S) /* S frames carry NR */
*dptr |= (ax25->vr << 5);
} else {
if ((frametype & AX25_U) == AX25_U) {
dptr = skb_put(skb, 1);
*dptr = frametype;
*dptr |= (poll_bit) ? AX25_PF : 0;
} else {
dptr = skb_put(skb, 2);
dptr[0] = frametype;
dptr[1] = (ax25->vr << 1);
dptr[1] |= (poll_bit) ? AX25_EPF : 0;
}
}
ax25_transmit_buffer(ax25, skb, type);
}
/*
* Send a 'DM' to an unknown connection attempt, or an invalid caller.
*
* Note: src here is the sender, thus it's the target of the DM
*/
void ax25_return_dm(struct net_device *dev, ax25_address *src, ax25_address *dest, ax25_digi *digi)
{
struct sk_buff *skb;
char *dptr;
ax25_digi retdigi;
if (dev == NULL)
return;
if ((skb = alloc_skb(dev->hard_header_len + 1, GFP_ATOMIC)) == NULL)
return; /* Next SABM will get DM'd */
skb_reserve(skb, dev->hard_header_len);
skb_reset_network_header(skb);
ax25_digi_invert(digi, &retdigi);
dptr = skb_put(skb, 1);
*dptr = AX25_DM | AX25_PF;
/*
* Do the address ourselves
*/
dptr = skb_push(skb, ax25_addr_size(digi));
dptr += ax25_addr_build(dptr, dest, src, &retdigi, AX25_RESPONSE, AX25_MODULUS);
ax25_queue_xmit(skb, dev);
}
/*
* Exponential backoff for AX.25
*/
void ax25_calculate_t1(ax25_cb *ax25)
{
int n, t = 2;
switch (ax25->backoff) {
case 0:
break;
case 1:
t += 2 * ax25->n2count;
break;
case 2:
for (n = 0; n < ax25->n2count; n++)
t *= 2;
if (t > 8) t = 8;
break;
}
ax25->t1 = t * ax25->rtt;
}
/*
* Calculate the Round Trip Time
*/
void ax25_calculate_rtt(ax25_cb *ax25)
{
if (ax25->backoff == 0)
return;
if (ax25_t1timer_running(ax25) && ax25->n2count == 0)
ax25->rtt = (9 * ax25->rtt + ax25->t1 - ax25_display_timer(&ax25->t1timer)) / 10;
if (ax25->rtt < AX25_T1CLAMPLO)
ax25->rtt = AX25_T1CLAMPLO;
if (ax25->rtt > AX25_T1CLAMPHI)
ax25->rtt = AX25_T1CLAMPHI;
}
void ax25_disconnect(ax25_cb *ax25, int reason)
{
ax25_clear_queues(ax25);
if (reason == ENETUNREACH) {
timer_delete_sync(&ax25->timer);
timer_delete_sync(&ax25->t1timer);
timer_delete_sync(&ax25->t2timer);
timer_delete_sync(&ax25->t3timer);
timer_delete_sync(&ax25->idletimer);
} else {
if (ax25->sk && !sock_flag(ax25->sk, SOCK_DESTROY))
ax25_stop_heartbeat(ax25);
ax25_stop_t1timer(ax25);
ax25_stop_t2timer(ax25);
ax25_stop_t3timer(ax25);
ax25_stop_idletimer(ax25);
}
ax25->state = AX25_STATE_0;
ax25_link_failed(ax25, reason);
if (ax25->sk != NULL) {
local_bh_disable();
bh_lock_sock(ax25->sk);
ax25->sk->sk_state = TCP_CLOSE;
ax25->sk->sk_err = reason;
ax25->sk->sk_shutdown |= SEND_SHUTDOWN;
if (!sock_flag(ax25->sk, SOCK_DEAD)) {
ax25->sk->sk_state_change(ax25->sk);
sock_set_flag(ax25->sk, SOCK_DEAD);
}
bh_unlock_sock(ax25->sk);
local_bh_enable();
}
}

224
net/ax25/ax25_timer.c
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@ -1,224 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
* Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
* Copyright (C) Darryl Miles G7LED (dlm@g7led.demon.co.uk)
* Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
* Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
* Copyright (C) 2002 Ralf Baechle DO1GRB (ralf@gnu.org)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/jiffies.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
static void ax25_heartbeat_expiry(struct timer_list *);
static void ax25_t1timer_expiry(struct timer_list *);
static void ax25_t2timer_expiry(struct timer_list *);
static void ax25_t3timer_expiry(struct timer_list *);
static void ax25_idletimer_expiry(struct timer_list *);
void ax25_setup_timers(ax25_cb *ax25)
{
timer_setup(&ax25->timer, ax25_heartbeat_expiry, 0);
timer_setup(&ax25->t1timer, ax25_t1timer_expiry, 0);
timer_setup(&ax25->t2timer, ax25_t2timer_expiry, 0);
timer_setup(&ax25->t3timer, ax25_t3timer_expiry, 0);
timer_setup(&ax25->idletimer, ax25_idletimer_expiry, 0);
}
void ax25_start_heartbeat(ax25_cb *ax25)
{
mod_timer(&ax25->timer, jiffies + 5 * HZ);
}
void ax25_start_t1timer(ax25_cb *ax25)
{
mod_timer(&ax25->t1timer, jiffies + ax25->t1);
}
void ax25_start_t2timer(ax25_cb *ax25)
{
mod_timer(&ax25->t2timer, jiffies + ax25->t2);
}
void ax25_start_t3timer(ax25_cb *ax25)
{
if (ax25->t3 > 0)
mod_timer(&ax25->t3timer, jiffies + ax25->t3);
else
timer_delete(&ax25->t3timer);
}
void ax25_start_idletimer(ax25_cb *ax25)
{
if (ax25->idle > 0)
mod_timer(&ax25->idletimer, jiffies + ax25->idle);
else
timer_delete(&ax25->idletimer);
}
void ax25_stop_heartbeat(ax25_cb *ax25)
{
timer_delete(&ax25->timer);
}
void ax25_stop_t1timer(ax25_cb *ax25)
{
timer_delete(&ax25->t1timer);
}
void ax25_stop_t2timer(ax25_cb *ax25)
{
timer_delete(&ax25->t2timer);
}
void ax25_stop_t3timer(ax25_cb *ax25)
{
timer_delete(&ax25->t3timer);
}
void ax25_stop_idletimer(ax25_cb *ax25)
{
timer_delete(&ax25->idletimer);
}
int ax25_t1timer_running(ax25_cb *ax25)
{
return timer_pending(&ax25->t1timer);
}
unsigned long ax25_display_timer(struct timer_list *timer)
{
long delta = timer->expires - jiffies;
if (!timer_pending(timer))
return 0;
return max(0L, delta);
}
EXPORT_SYMBOL(ax25_display_timer);
static void ax25_heartbeat_expiry(struct timer_list *t)
{
int proto = AX25_PROTO_STD_SIMPLEX;
ax25_cb *ax25 = timer_container_of(ax25, t, timer);
if (ax25->ax25_dev)
proto = ax25->ax25_dev->values[AX25_VALUES_PROTOCOL];
switch (proto) {
case AX25_PROTO_STD_SIMPLEX:
case AX25_PROTO_STD_DUPLEX:
ax25_std_heartbeat_expiry(ax25);
break;
#ifdef CONFIG_AX25_DAMA_SLAVE
case AX25_PROTO_DAMA_SLAVE:
if (ax25->ax25_dev->dama.slave)
ax25_ds_heartbeat_expiry(ax25);
else
ax25_std_heartbeat_expiry(ax25);
break;
#endif
}
}
static void ax25_t1timer_expiry(struct timer_list *t)
{
ax25_cb *ax25 = timer_container_of(ax25, t, t1timer);
switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
case AX25_PROTO_STD_SIMPLEX:
case AX25_PROTO_STD_DUPLEX:
ax25_std_t1timer_expiry(ax25);
break;
#ifdef CONFIG_AX25_DAMA_SLAVE
case AX25_PROTO_DAMA_SLAVE:
if (!ax25->ax25_dev->dama.slave)
ax25_std_t1timer_expiry(ax25);
break;
#endif
}
}
static void ax25_t2timer_expiry(struct timer_list *t)
{
ax25_cb *ax25 = timer_container_of(ax25, t, t2timer);
switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
case AX25_PROTO_STD_SIMPLEX:
case AX25_PROTO_STD_DUPLEX:
ax25_std_t2timer_expiry(ax25);
break;
#ifdef CONFIG_AX25_DAMA_SLAVE
case AX25_PROTO_DAMA_SLAVE:
if (!ax25->ax25_dev->dama.slave)
ax25_std_t2timer_expiry(ax25);
break;
#endif
}
}
static void ax25_t3timer_expiry(struct timer_list *t)
{
ax25_cb *ax25 = timer_container_of(ax25, t, t3timer);
switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
case AX25_PROTO_STD_SIMPLEX:
case AX25_PROTO_STD_DUPLEX:
ax25_std_t3timer_expiry(ax25);
break;
#ifdef CONFIG_AX25_DAMA_SLAVE
case AX25_PROTO_DAMA_SLAVE:
if (ax25->ax25_dev->dama.slave)
ax25_ds_t3timer_expiry(ax25);
else
ax25_std_t3timer_expiry(ax25);
break;
#endif
}
}
static void ax25_idletimer_expiry(struct timer_list *t)
{
ax25_cb *ax25 = timer_container_of(ax25, t, idletimer);
switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
case AX25_PROTO_STD_SIMPLEX:
case AX25_PROTO_STD_DUPLEX:
ax25_std_idletimer_expiry(ax25);
break;
#ifdef CONFIG_AX25_DAMA_SLAVE
case AX25_PROTO_DAMA_SLAVE:
if (ax25->ax25_dev->dama.slave)
ax25_ds_idletimer_expiry(ax25);
else
ax25_std_idletimer_expiry(ax25);
break;
#endif
}
}

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@ -1,204 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
*/
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/notifier.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/stat.h>
#include <linux/sysctl.h>
#include <linux/export.h>
#include <net/ip.h>
#include <net/arp.h>
/*
* Callsign/UID mapper. This is in kernel space for security on multi-amateur machines.
*/
static HLIST_HEAD(ax25_uid_list);
static DEFINE_RWLOCK(ax25_uid_lock);
int ax25_uid_policy;
EXPORT_SYMBOL(ax25_uid_policy);
ax25_uid_assoc *ax25_findbyuid(kuid_t uid)
{
ax25_uid_assoc *ax25_uid, *res = NULL;
read_lock(&ax25_uid_lock);
ax25_uid_for_each(ax25_uid, &ax25_uid_list) {
if (uid_eq(ax25_uid->uid, uid)) {
ax25_uid_hold(ax25_uid);
res = ax25_uid;
break;
}
}
read_unlock(&ax25_uid_lock);
return res;
}
EXPORT_SYMBOL(ax25_findbyuid);
int ax25_uid_ioctl(int cmd, struct sockaddr_ax25 *sax)
{
ax25_uid_assoc *ax25_uid;
ax25_uid_assoc *user;
unsigned long res;
switch (cmd) {
case SIOCAX25GETUID:
res = -ENOENT;
read_lock(&ax25_uid_lock);
ax25_uid_for_each(ax25_uid, &ax25_uid_list) {
if (ax25cmp(&sax->sax25_call, &ax25_uid->call) == 0) {
res = from_kuid_munged(current_user_ns(), ax25_uid->uid);
break;
}
}
read_unlock(&ax25_uid_lock);
return res;
case SIOCAX25ADDUID:
{
kuid_t sax25_kuid;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
sax25_kuid = make_kuid(current_user_ns(), sax->sax25_uid);
if (!uid_valid(sax25_kuid))
return -EINVAL;
user = ax25_findbyuid(sax25_kuid);
if (user) {
ax25_uid_put(user);
return -EEXIST;
}
if (sax->sax25_uid == 0)
return -EINVAL;
if ((ax25_uid = kmalloc_obj(*ax25_uid)) == NULL)
return -ENOMEM;
refcount_set(&ax25_uid->refcount, 1);
ax25_uid->uid = sax25_kuid;
ax25_uid->call = sax->sax25_call;
write_lock(&ax25_uid_lock);
hlist_add_head(&ax25_uid->uid_node, &ax25_uid_list);
write_unlock(&ax25_uid_lock);
return 0;
}
case SIOCAX25DELUID:
if (!capable(CAP_NET_ADMIN))
return -EPERM;
ax25_uid = NULL;
write_lock(&ax25_uid_lock);
ax25_uid_for_each(ax25_uid, &ax25_uid_list) {
if (ax25cmp(&sax->sax25_call, &ax25_uid->call) == 0)
break;
}
if (ax25_uid == NULL) {
write_unlock(&ax25_uid_lock);
return -ENOENT;
}
hlist_del_init(&ax25_uid->uid_node);
ax25_uid_put(ax25_uid);
write_unlock(&ax25_uid_lock);
return 0;
default:
return -EINVAL;
}
return -EINVAL; /*NOTREACHED */
}
#ifdef CONFIG_PROC_FS
static void *ax25_uid_seq_start(struct seq_file *seq, loff_t *pos)
__acquires(ax25_uid_lock)
{
read_lock(&ax25_uid_lock);
return seq_hlist_start_head(&ax25_uid_list, *pos);
}
static void *ax25_uid_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
return seq_hlist_next(v, &ax25_uid_list, pos);
}
static void ax25_uid_seq_stop(struct seq_file *seq, void *v)
__releases(ax25_uid_lock)
{
read_unlock(&ax25_uid_lock);
}
static int ax25_uid_seq_show(struct seq_file *seq, void *v)
{
char buf[11];
if (v == SEQ_START_TOKEN)
seq_printf(seq, "Policy: %d\n", ax25_uid_policy);
else {
struct ax25_uid_assoc *pt;
pt = hlist_entry(v, struct ax25_uid_assoc, uid_node);
seq_printf(seq, "%6d %s\n",
from_kuid_munged(seq_user_ns(seq), pt->uid),
ax2asc(buf, &pt->call));
}
return 0;
}
const struct seq_operations ax25_uid_seqops = {
.start = ax25_uid_seq_start,
.next = ax25_uid_seq_next,
.stop = ax25_uid_seq_stop,
.show = ax25_uid_seq_show,
};
#endif
/*
* Free all memory associated with UID/Callsign structures.
*/
void __exit ax25_uid_free(void)
{
ax25_uid_assoc *ax25_uid;
write_lock(&ax25_uid_lock);
again:
ax25_uid_for_each(ax25_uid, &ax25_uid_list) {
hlist_del_init(&ax25_uid->uid_node);
ax25_uid_put(ax25_uid);
goto again;
}
write_unlock(&ax25_uid_lock);
}

181
net/ax25/sysctl_net_ax25.c
View File

@ -1,181 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) 1996 Mike Shaver (shaver@zeroknowledge.com)
*/
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/sysctl.h>
#include <linux/spinlock.h>
#include <net/ax25.h>
static int min_ipdefmode[1], max_ipdefmode[] = {1};
static int min_axdefmode[1], max_axdefmode[] = {1};
static int min_backoff[1], max_backoff[] = {2};
static int min_conmode[1], max_conmode[] = {2};
static int min_window[] = {1}, max_window[] = {7};
static int min_ewindow[] = {1}, max_ewindow[] = {63};
static int min_t1[] = {1}, max_t1[] = {30000};
static int min_t2[] = {1}, max_t2[] = {20000};
static int min_t3[1], max_t3[] = {3600000};
static int min_idle[1], max_idle[] = {65535000};
static int min_n2[] = {1}, max_n2[] = {31};
static int min_paclen[] = {1}, max_paclen[] = {512};
static int min_proto[1], max_proto[] = { AX25_PROTO_MAX };
#ifdef CONFIG_AX25_DAMA_SLAVE
static int min_ds_timeout[1], max_ds_timeout[] = {65535000};
#endif
static const struct ctl_table ax25_param_table[] = {
{
.procname = "ip_default_mode",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_ipdefmode,
.extra2 = &max_ipdefmode
},
{
.procname = "ax25_default_mode",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_axdefmode,
.extra2 = &max_axdefmode
},
{
.procname = "backoff_type",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_backoff,
.extra2 = &max_backoff
},
{
.procname = "connect_mode",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_conmode,
.extra2 = &max_conmode
},
{
.procname = "standard_window_size",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_window,
.extra2 = &max_window
},
{
.procname = "extended_window_size",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_ewindow,
.extra2 = &max_ewindow
},
{
.procname = "t1_timeout",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_t1,
.extra2 = &max_t1
},
{
.procname = "t2_timeout",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_t2,
.extra2 = &max_t2
},
{
.procname = "t3_timeout",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_t3,
.extra2 = &max_t3
},
{
.procname = "idle_timeout",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_idle,
.extra2 = &max_idle
},
{
.procname = "maximum_retry_count",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_n2,
.extra2 = &max_n2
},
{
.procname = "maximum_packet_length",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_paclen,
.extra2 = &max_paclen
},
{
.procname = "protocol",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_proto,
.extra2 = &max_proto
},
#ifdef CONFIG_AX25_DAMA_SLAVE
{
.procname = "dama_slave_timeout",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_ds_timeout,
.extra2 = &max_ds_timeout
},
#endif
};
int ax25_register_dev_sysctl(ax25_dev *ax25_dev)
{
char path[sizeof("net/ax25/") + IFNAMSIZ];
int k;
struct ctl_table *table;
table = kmemdup(ax25_param_table, sizeof(ax25_param_table), GFP_KERNEL);
if (!table)
return -ENOMEM;
BUILD_BUG_ON(ARRAY_SIZE(ax25_param_table) != AX25_MAX_VALUES);
for (k = 0; k < AX25_MAX_VALUES; k++)
table[k].data = &ax25_dev->values[k];
snprintf(path, sizeof(path), "net/ax25/%s", ax25_dev->dev->name);
ax25_dev->sysheader = register_net_sysctl_sz(&init_net, path, table,
ARRAY_SIZE(ax25_param_table));
if (!ax25_dev->sysheader) {
kfree(table);
return -ENOMEM;
}
return 0;
}
void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev)
{
struct ctl_table_header *header = ax25_dev->sysheader;
const struct ctl_table *table;
if (header) {
ax25_dev->sysheader = NULL;
table = header->ctl_table_arg;
unregister_net_sysctl_table(header);
kfree(table);
}
}

1
net/ipv4/arp.c
View File

@ -109,7 +109,6 @@
#include <net/sock.h> #include <net/sock.h>
#include <net/arp.h> #include <net/arp.h>
#include <net/ax25.h> #include <net/ax25.h>
#include <net/netrom.h>
#include <net/dst_metadata.h> #include <net/dst_metadata.h>
#include <net/ip_tunnels.h> #include <net/ip_tunnels.h>

10
net/netrom/Makefile
View File

@ -1,10 +0,0 @@
# SPDX-License-Identifier: GPL-2.0-only
#
# Makefile for the Linux NET/ROM layer.
#
obj-$(CONFIG_NETROM) += netrom.o
netrom-y := af_netrom.o nr_dev.o nr_in.o nr_loopback.o \
nr_out.o nr_route.o nr_subr.o nr_timer.o
netrom-$(CONFIG_SYSCTL) += sysctl_net_netrom.o

1536
net/netrom/af_netrom.c
View File

File diff suppressed because it is too large Load Diff

178
net/netrom/nr_dev.c
View File

@ -1,178 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
*/
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/fs.h>
#include <linux/types.h>
#include <linux/sysctl.h>
#include <linux/string.h>
#include <linux/socket.h>
#include <linux/errno.h>
#include <linux/fcntl.h>
#include <linux/in.h>
#include <linux/if_ether.h> /* For the statistics structure. */
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <asm/io.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/skbuff.h>
#include <net/ip.h>
#include <net/arp.h>
#include <net/ax25.h>
#include <net/netrom.h>
/*
* Only allow IP over NET/ROM frames through if the netrom device is up.
*/
int nr_rx_ip(struct sk_buff *skb, struct net_device *dev)
{
struct net_device_stats *stats = &dev->stats;
if (!netif_running(dev)) {
stats->rx_dropped++;
return 0;
}
stats->rx_packets++;
stats->rx_bytes += skb->len;
skb->protocol = htons(ETH_P_IP);
/* Spoof incoming device */
skb->dev = dev;
skb->mac_header = skb->network_header;
skb_reset_network_header(skb);
skb->pkt_type = PACKET_HOST;
netif_rx(skb);
return 1;
}
static int nr_header(struct sk_buff *skb, struct net_device *dev,
unsigned short type,
const void *daddr, const void *saddr, unsigned int len)
{
unsigned char *buff = skb_push(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
memcpy(buff, (saddr != NULL) ? saddr : dev->dev_addr, dev->addr_len);
buff[6] &= ~AX25_CBIT;
buff[6] &= ~AX25_EBIT;
buff[6] |= AX25_SSSID_SPARE;
buff += AX25_ADDR_LEN;
if (daddr != NULL)
memcpy(buff, daddr, dev->addr_len);
buff[6] &= ~AX25_CBIT;
buff[6] |= AX25_EBIT;
buff[6] |= AX25_SSSID_SPARE;
buff += AX25_ADDR_LEN;
*buff++ = READ_ONCE(sysctl_netrom_network_ttl_initialiser);
*buff++ = NR_PROTO_IP;
*buff++ = NR_PROTO_IP;
*buff++ = 0;
*buff++ = 0;
*buff++ = NR_PROTOEXT;
if (daddr != NULL)
return 37;
return -37;
}
static int __must_check nr_set_mac_address(struct net_device *dev, void *addr)
{
struct sockaddr *sa = addr;
int err;
if (!memcmp(dev->dev_addr, sa->sa_data, dev->addr_len))
return 0;
if (dev->flags & IFF_UP) {
err = ax25_listen_register((ax25_address *)sa->sa_data, NULL);
if (err)
return err;
ax25_listen_release((const ax25_address *)dev->dev_addr, NULL);
}
dev_addr_set(dev, sa->sa_data);
return 0;
}
static int nr_open(struct net_device *dev)
{
int err;
err = ax25_listen_register((const ax25_address *)dev->dev_addr, NULL);
if (err)
return err;
netif_start_queue(dev);
return 0;
}
static int nr_close(struct net_device *dev)
{
ax25_listen_release((const ax25_address *)dev->dev_addr, NULL);
netif_stop_queue(dev);
return 0;
}
static netdev_tx_t nr_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct net_device_stats *stats = &dev->stats;
unsigned int len = skb->len;
if (!nr_route_frame(skb, NULL)) {
kfree_skb(skb);
stats->tx_errors++;
return NETDEV_TX_OK;
}
stats->tx_packets++;
stats->tx_bytes += len;
return NETDEV_TX_OK;
}
static const struct header_ops nr_header_ops = {
.create = nr_header,
};
static const struct net_device_ops nr_netdev_ops = {
.ndo_open = nr_open,
.ndo_stop = nr_close,
.ndo_start_xmit = nr_xmit,
.ndo_set_mac_address = nr_set_mac_address,
};
void nr_setup(struct net_device *dev)
{
dev->mtu = NR_MAX_PACKET_SIZE;
dev->netdev_ops = &nr_netdev_ops;
dev->header_ops = &nr_header_ops;
dev->hard_header_len = NR_NETWORK_LEN + NR_TRANSPORT_LEN;
dev->addr_len = AX25_ADDR_LEN;
dev->type = ARPHRD_NETROM;
/* New-style flags. */
dev->flags = IFF_NOARP;
}

301
net/netrom/nr_in.c
View File

@ -1,301 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
* Copyright Darryl Miles G7LED (dlm@g7led.demon.co.uk)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/slab.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <net/netrom.h>
static int nr_queue_rx_frame(struct sock *sk, struct sk_buff *skb, int more)
{
struct sk_buff *skbo, *skbn = skb;
struct nr_sock *nr = nr_sk(sk);
skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
nr_start_idletimer(sk);
if (more) {
nr->fraglen += skb->len;
skb_queue_tail(&nr->frag_queue, skb);
return 0;
}
if (!more && nr->fraglen > 0) { /* End of fragment */
nr->fraglen += skb->len;
skb_queue_tail(&nr->frag_queue, skb);
if ((skbn = alloc_skb(nr->fraglen, GFP_ATOMIC)) == NULL)
return 1;
skb_reset_transport_header(skbn);
while ((skbo = skb_dequeue(&nr->frag_queue)) != NULL) {
skb_copy_from_linear_data(skbo,
skb_put(skbn, skbo->len),
skbo->len);
kfree_skb(skbo);
}
nr->fraglen = 0;
}
return sock_queue_rcv_skb(sk, skbn);
}
/*
* State machine for state 1, Awaiting Connection State.
* The handling of the timer(s) is in file nr_timer.c.
* Handling of state 0 and connection release is in netrom.c.
*/
static int nr_state1_machine(struct sock *sk, struct sk_buff *skb,
int frametype)
{
switch (frametype) {
case NR_CONNACK: {
struct nr_sock *nr = nr_sk(sk);
nr_stop_t1timer(sk);
nr_start_idletimer(sk);
nr->your_index = skb->data[17];
nr->your_id = skb->data[18];
nr->vs = 0;
nr->va = 0;
nr->vr = 0;
nr->vl = 0;
nr->state = NR_STATE_3;
nr->n2count = 0;
nr->window = skb->data[20];
sk->sk_state = TCP_ESTABLISHED;
if (!sock_flag(sk, SOCK_DEAD))
sk->sk_state_change(sk);
break;
}
case NR_CONNACK | NR_CHOKE_FLAG:
nr_disconnect(sk, ECONNREFUSED);
break;
case NR_RESET:
if (READ_ONCE(sysctl_netrom_reset_circuit))
nr_disconnect(sk, ECONNRESET);
break;
default:
break;
}
return 0;
}
/*
* State machine for state 2, Awaiting Release State.
* The handling of the timer(s) is in file nr_timer.c
* Handling of state 0 and connection release is in netrom.c.
*/
static int nr_state2_machine(struct sock *sk, struct sk_buff *skb,
int frametype)
{
switch (frametype) {
case NR_CONNACK | NR_CHOKE_FLAG:
nr_disconnect(sk, ECONNRESET);
break;
case NR_DISCREQ:
nr_write_internal(sk, NR_DISCACK);
fallthrough;
case NR_DISCACK:
nr_disconnect(sk, 0);
break;
case NR_RESET:
if (READ_ONCE(sysctl_netrom_reset_circuit))
nr_disconnect(sk, ECONNRESET);
break;
default:
break;
}
return 0;
}
/*
* State machine for state 3, Connected State.
* The handling of the timer(s) is in file nr_timer.c
* Handling of state 0 and connection release is in netrom.c.
*/
static int nr_state3_machine(struct sock *sk, struct sk_buff *skb, int frametype)
{
struct nr_sock *nrom = nr_sk(sk);
struct sk_buff_head temp_queue;
struct sk_buff *skbn;
unsigned short save_vr;
unsigned short nr, ns;
int queued = 0;
nr = skb->data[18];
switch (frametype) {
case NR_CONNREQ:
nr_write_internal(sk, NR_CONNACK);
break;
case NR_DISCREQ:
nr_write_internal(sk, NR_DISCACK);
nr_disconnect(sk, 0);
break;
case NR_CONNACK | NR_CHOKE_FLAG:
case NR_DISCACK:
nr_disconnect(sk, ECONNRESET);
break;
case NR_INFOACK:
case NR_INFOACK | NR_CHOKE_FLAG:
case NR_INFOACK | NR_NAK_FLAG:
case NR_INFOACK | NR_NAK_FLAG | NR_CHOKE_FLAG:
if (frametype & NR_CHOKE_FLAG) {
nrom->condition |= NR_COND_PEER_RX_BUSY;
nr_start_t4timer(sk);
} else {
nrom->condition &= ~NR_COND_PEER_RX_BUSY;
nr_stop_t4timer(sk);
}
if (!nr_validate_nr(sk, nr)) {
break;
}
if (frametype & NR_NAK_FLAG) {
nr_frames_acked(sk, nr);
nr_send_nak_frame(sk);
} else {
if (nrom->condition & NR_COND_PEER_RX_BUSY) {
nr_frames_acked(sk, nr);
} else {
nr_check_iframes_acked(sk, nr);
}
}
break;
case NR_INFO:
case NR_INFO | NR_NAK_FLAG:
case NR_INFO | NR_CHOKE_FLAG:
case NR_INFO | NR_MORE_FLAG:
case NR_INFO | NR_NAK_FLAG | NR_CHOKE_FLAG:
case NR_INFO | NR_CHOKE_FLAG | NR_MORE_FLAG:
case NR_INFO | NR_NAK_FLAG | NR_MORE_FLAG:
case NR_INFO | NR_NAK_FLAG | NR_CHOKE_FLAG | NR_MORE_FLAG:
if (frametype & NR_CHOKE_FLAG) {
nrom->condition |= NR_COND_PEER_RX_BUSY;
nr_start_t4timer(sk);
} else {
nrom->condition &= ~NR_COND_PEER_RX_BUSY;
nr_stop_t4timer(sk);
}
if (nr_validate_nr(sk, nr)) {
if (frametype & NR_NAK_FLAG) {
nr_frames_acked(sk, nr);
nr_send_nak_frame(sk);
} else {
if (nrom->condition & NR_COND_PEER_RX_BUSY) {
nr_frames_acked(sk, nr);
} else {
nr_check_iframes_acked(sk, nr);
}
}
}
queued = 1;
skb_queue_head(&nrom->reseq_queue, skb);
if (nrom->condition & NR_COND_OWN_RX_BUSY)
break;
skb_queue_head_init(&temp_queue);
do {
save_vr = nrom->vr;
while ((skbn = skb_dequeue(&nrom->reseq_queue)) != NULL) {
ns = skbn->data[17];
if (ns == nrom->vr) {
if (nr_queue_rx_frame(sk, skbn, frametype & NR_MORE_FLAG) == 0) {
nrom->vr = (nrom->vr + 1) % NR_MODULUS;
} else {
nrom->condition |= NR_COND_OWN_RX_BUSY;
skb_queue_tail(&temp_queue, skbn);
}
} else if (nr_in_rx_window(sk, ns)) {
skb_queue_tail(&temp_queue, skbn);
} else {
kfree_skb(skbn);
}
}
while ((skbn = skb_dequeue(&temp_queue)) != NULL) {
skb_queue_tail(&nrom->reseq_queue, skbn);
}
} while (save_vr != nrom->vr);
/*
* Window is full, ack it immediately.
*/
if (((nrom->vl + nrom->window) % NR_MODULUS) == nrom->vr) {
nr_enquiry_response(sk);
} else {
if (!(nrom->condition & NR_COND_ACK_PENDING)) {
nrom->condition |= NR_COND_ACK_PENDING;
nr_start_t2timer(sk);
}
}
break;
case NR_RESET:
if (READ_ONCE(sysctl_netrom_reset_circuit))
nr_disconnect(sk, ECONNRESET);
break;
default:
break;
}
return queued;
}
/* Higher level upcall for a LAPB frame - called with sk locked */
int nr_process_rx_frame(struct sock *sk, struct sk_buff *skb)
{
struct nr_sock *nr = nr_sk(sk);
int queued = 0, frametype;
if (nr->state == NR_STATE_0)
return 0;
frametype = skb->data[19];
switch (nr->state) {
case NR_STATE_1:
queued = nr_state1_machine(sk, skb, frametype);
break;
case NR_STATE_2:
queued = nr_state2_machine(sk, skb, frametype);
break;
case NR_STATE_3:
queued = nr_state3_machine(sk, skb, frametype);
break;
}
nr_kick(sk);
return queued;
}

73
net/netrom/nr_loopback.c
View File

@ -1,73 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright Tomi Manninen OH2BNS (oh2bns@sral.fi)
*/
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/socket.h>
#include <linux/timer.h>
#include <net/ax25.h>
#include <linux/skbuff.h>
#include <net/netrom.h>
#include <linux/init.h>
static void nr_loopback_timer(struct timer_list *);
static struct sk_buff_head loopback_queue;
static DEFINE_TIMER(loopback_timer, nr_loopback_timer);
void __init nr_loopback_init(void)
{
skb_queue_head_init(&loopback_queue);
}
static inline int nr_loopback_running(void)
{
return timer_pending(&loopback_timer);
}
int nr_loopback_queue(struct sk_buff *skb)
{
struct sk_buff *skbn;
if ((skbn = alloc_skb(skb->len, GFP_ATOMIC)) != NULL) {
skb_copy_from_linear_data(skb, skb_put(skbn, skb->len), skb->len);
skb_reset_transport_header(skbn);
skb_queue_tail(&loopback_queue, skbn);
if (!nr_loopback_running())
mod_timer(&loopback_timer, jiffies + 10);
}
kfree_skb(skb);
return 1;
}
static void nr_loopback_timer(struct timer_list *unused)
{
struct sk_buff *skb;
ax25_address *nr_dest;
struct net_device *dev;
if ((skb = skb_dequeue(&loopback_queue)) != NULL) {
nr_dest = (ax25_address *)(skb->data + 7);
dev = nr_dev_get(nr_dest);
if (dev == NULL || nr_rx_frame(skb, dev) == 0)
kfree_skb(skb);
dev_put(dev);
if (!skb_queue_empty(&loopback_queue) && !nr_loopback_running())
mod_timer(&loopback_timer, jiffies + 10);
}
}
void nr_loopback_clear(void)
{
timer_delete_sync(&loopback_timer);
skb_queue_purge(&loopback_queue);
}

272
net/netrom/nr_out.c
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@ -1,272 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
* Copyright Darryl Miles G7LED (dlm@g7led.demon.co.uk)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/slab.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <net/netrom.h>
/*
* This is where all NET/ROM frames pass, except for IP-over-NET/ROM which
* cannot be fragmented in this manner.
*/
void nr_output(struct sock *sk, struct sk_buff *skb)
{
struct sk_buff *skbn;
unsigned char transport[NR_TRANSPORT_LEN];
int err, frontlen, len;
if (skb->len - NR_TRANSPORT_LEN > NR_MAX_PACKET_SIZE) {
/* Save a copy of the Transport Header */
skb_copy_from_linear_data(skb, transport, NR_TRANSPORT_LEN);
skb_pull(skb, NR_TRANSPORT_LEN);
frontlen = skb_headroom(skb);
while (skb->len > 0) {
if ((skbn = sock_alloc_send_skb(sk, frontlen + NR_MAX_PACKET_SIZE, 0, &err)) == NULL) {
kfree_skb(skb);
return;
}
skb_reserve(skbn, frontlen);
len = (NR_MAX_PACKET_SIZE > skb->len) ? skb->len : NR_MAX_PACKET_SIZE;
/* Copy the user data */
skb_copy_from_linear_data(skb, skb_put(skbn, len), len);
skb_pull(skb, len);
/* Duplicate the Transport Header */
skb_push(skbn, NR_TRANSPORT_LEN);
skb_copy_to_linear_data(skbn, transport,
NR_TRANSPORT_LEN);
if (skb->len > 0)
skbn->data[4] |= NR_MORE_FLAG;
skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
}
kfree_skb(skb);
} else {
skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
}
nr_kick(sk);
}
/*
* This procedure is passed a buffer descriptor for an iframe. It builds
* the rest of the control part of the frame and then writes it out.
*/
static void nr_send_iframe(struct sock *sk, struct sk_buff *skb)
{
struct nr_sock *nr = nr_sk(sk);
if (skb == NULL)
return;
skb->data[2] = nr->vs;
skb->data[3] = nr->vr;
if (nr->condition & NR_COND_OWN_RX_BUSY)
skb->data[4] |= NR_CHOKE_FLAG;
nr_start_idletimer(sk);
nr_transmit_buffer(sk, skb);
}
void nr_send_nak_frame(struct sock *sk)
{
struct sk_buff *skb, *skbn;
struct nr_sock *nr = nr_sk(sk);
if ((skb = skb_peek(&nr->ack_queue)) == NULL)
return;
if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL)
return;
skbn->data[2] = nr->va;
skbn->data[3] = nr->vr;
if (nr->condition & NR_COND_OWN_RX_BUSY)
skbn->data[4] |= NR_CHOKE_FLAG;
nr_transmit_buffer(sk, skbn);
nr->condition &= ~NR_COND_ACK_PENDING;
nr->vl = nr->vr;
nr_stop_t1timer(sk);
}
void nr_kick(struct sock *sk)
{
struct nr_sock *nr = nr_sk(sk);
struct sk_buff *skb, *skbn;
unsigned short start, end;
if (nr->state != NR_STATE_3)
return;
if (nr->condition & NR_COND_PEER_RX_BUSY)
return;
if (!skb_peek(&sk->sk_write_queue))
return;
start = (skb_peek(&nr->ack_queue) == NULL) ? nr->va : nr->vs;
end = (nr->va + nr->window) % NR_MODULUS;
if (start == end)
return;
nr->vs = start;
/*
* Transmit data until either we're out of data to send or
* the window is full.
*/
/*
* Dequeue the frame and copy it.
*/
skb = skb_dequeue(&sk->sk_write_queue);
do {
if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
skb_queue_head(&sk->sk_write_queue, skb);
break;
}
skb_set_owner_w(skbn, sk);
/*
* Transmit the frame copy.
*/
nr_send_iframe(sk, skbn);
nr->vs = (nr->vs + 1) % NR_MODULUS;
/*
* Requeue the original data frame.
*/
skb_queue_tail(&nr->ack_queue, skb);
} while (nr->vs != end &&
(skb = skb_dequeue(&sk->sk_write_queue)) != NULL);
nr->vl = nr->vr;
nr->condition &= ~NR_COND_ACK_PENDING;
if (!nr_t1timer_running(sk))
nr_start_t1timer(sk);
}
void nr_transmit_buffer(struct sock *sk, struct sk_buff *skb)
{
struct nr_sock *nr = nr_sk(sk);
unsigned char *dptr;
/*
* Add the protocol byte and network header.
*/
dptr = skb_push(skb, NR_NETWORK_LEN);
memcpy(dptr, &nr->source_addr, AX25_ADDR_LEN);
dptr[6] &= ~AX25_CBIT;
dptr[6] &= ~AX25_EBIT;
dptr[6] |= AX25_SSSID_SPARE;
dptr += AX25_ADDR_LEN;
memcpy(dptr, &nr->dest_addr, AX25_ADDR_LEN);
dptr[6] &= ~AX25_CBIT;
dptr[6] |= AX25_EBIT;
dptr[6] |= AX25_SSSID_SPARE;
dptr += AX25_ADDR_LEN;
*dptr++ = READ_ONCE(sysctl_netrom_network_ttl_initialiser);
if (!nr_route_frame(skb, NULL)) {
kfree_skb(skb);
nr_disconnect(sk, ENETUNREACH);
}
}
/*
* The following routines are taken from page 170 of the 7th ARRL Computer
* Networking Conference paper, as is the whole state machine.
*/
void nr_establish_data_link(struct sock *sk)
{
struct nr_sock *nr = nr_sk(sk);
nr->condition = 0x00;
nr->n2count = 0;
nr_write_internal(sk, NR_CONNREQ);
nr_stop_t2timer(sk);
nr_stop_t4timer(sk);
nr_stop_idletimer(sk);
nr_start_t1timer(sk);
}
/*
* Never send a NAK when we are CHOKEd.
*/
void nr_enquiry_response(struct sock *sk)
{
struct nr_sock *nr = nr_sk(sk);
int frametype = NR_INFOACK;
if (nr->condition & NR_COND_OWN_RX_BUSY) {
frametype |= NR_CHOKE_FLAG;
} else {
if (skb_peek(&nr->reseq_queue) != NULL)
frametype |= NR_NAK_FLAG;
}
nr_write_internal(sk, frametype);
nr->vl = nr->vr;
nr->condition &= ~NR_COND_ACK_PENDING;
}
void nr_check_iframes_acked(struct sock *sk, unsigned short nr)
{
struct nr_sock *nrom = nr_sk(sk);
if (nrom->vs == nr) {
nr_frames_acked(sk, nr);
nr_stop_t1timer(sk);
nrom->n2count = 0;
} else {
if (nrom->va != nr) {
nr_frames_acked(sk, nr);
nr_start_t1timer(sk);
}
}
}

989
net/netrom/nr_route.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
* Copyright Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
* Copyright Tomi Manninen OH2BNS (oh2bns@sral.fi)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/slab.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <net/arp.h>
#include <linux/if_arp.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/termios.h> /* For TIOCINQ/OUTQ */
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <net/netrom.h>
#include <linux/seq_file.h>
#include <linux/export.h>
static unsigned int nr_neigh_no = 1;
static HLIST_HEAD(nr_node_list);
static DEFINE_SPINLOCK(nr_node_list_lock);
static HLIST_HEAD(nr_neigh_list);
static DEFINE_SPINLOCK(nr_neigh_list_lock);
static struct nr_node *nr_node_get(ax25_address *callsign)
{
struct nr_node *found = NULL;
struct nr_node *nr_node;
spin_lock_bh(&nr_node_list_lock);
nr_node_for_each(nr_node, &nr_node_list)
if (ax25cmp(callsign, &nr_node->callsign) == 0) {
nr_node_hold(nr_node);
found = nr_node;
break;
}
spin_unlock_bh(&nr_node_list_lock);
return found;
}
static struct nr_neigh *nr_neigh_get_dev(ax25_address *callsign,
struct net_device *dev)
{
struct nr_neigh *found = NULL;
struct nr_neigh *nr_neigh;
spin_lock_bh(&nr_neigh_list_lock);
nr_neigh_for_each(nr_neigh, &nr_neigh_list)
if (ax25cmp(callsign, &nr_neigh->callsign) == 0 &&
nr_neigh->dev == dev) {
nr_neigh_hold(nr_neigh);
found = nr_neigh;
break;
}
spin_unlock_bh(&nr_neigh_list_lock);
return found;
}
static void nr_remove_neigh(struct nr_neigh *);
/* re-sort the routes in quality order. */
static void re_sort_routes(struct nr_node *nr_node, int x, int y)
{
if (nr_node->routes[y].quality > nr_node->routes[x].quality) {
if (nr_node->which == x)
nr_node->which = y;
else if (nr_node->which == y)
nr_node->which = x;
swap(nr_node->routes[x], nr_node->routes[y]);
}
}
/*
* Add a new route to a node, and in the process add the node and the
* neighbour if it is new.
*/
static int __must_check nr_add_node(ax25_address *nr, const char *mnemonic,
ax25_address *ax25, ax25_digi *ax25_digi, struct net_device *dev,
int quality, int obs_count)
{
struct nr_node *nr_node;
struct nr_neigh *nr_neigh;
int i, found;
struct net_device *odev;
if ((odev=nr_dev_get(nr)) != NULL) { /* Can't add routes to ourself */
dev_put(odev);
return -EINVAL;
}
nr_node = nr_node_get(nr);
nr_neigh = nr_neigh_get_dev(ax25, dev);
/*
* The L2 link to a neighbour has failed in the past
* and now a frame comes from this neighbour. We assume
* it was a temporary trouble with the link and reset the
* routes now (and not wait for a node broadcast).
*/
if (nr_neigh != NULL && nr_neigh->failed != 0 && quality == 0) {
struct nr_node *nr_nodet;
spin_lock_bh(&nr_node_list_lock);
nr_node_for_each(nr_nodet, &nr_node_list) {
nr_node_lock(nr_nodet);
for (i = 0; i < nr_nodet->count; i++)
if (nr_nodet->routes[i].neighbour == nr_neigh)
if (i < nr_nodet->which)
nr_nodet->which = i;
nr_node_unlock(nr_nodet);
}
spin_unlock_bh(&nr_node_list_lock);
}
if (nr_neigh != NULL)
nr_neigh->failed = 0;
if (quality == 0 && nr_neigh != NULL && nr_node != NULL) {
nr_neigh_put(nr_neigh);
nr_node_put(nr_node);
return 0;
}
if (nr_neigh == NULL) {
if ((nr_neigh = kmalloc(sizeof(*nr_neigh), GFP_ATOMIC)) == NULL) {
if (nr_node)
nr_node_put(nr_node);
return -ENOMEM;
}
nr_neigh->callsign = *ax25;
nr_neigh->digipeat = NULL;
nr_neigh->ax25 = NULL;
nr_neigh->dev = dev;
nr_neigh->quality = READ_ONCE(sysctl_netrom_default_path_quality);
nr_neigh->locked = 0;
nr_neigh->count = 0;
nr_neigh->number = nr_neigh_no++;
nr_neigh->failed = 0;
refcount_set(&nr_neigh->refcount, 1);
if (ax25_digi != NULL && ax25_digi->ndigi > 0) {
nr_neigh->digipeat = kmemdup(ax25_digi,
sizeof(*ax25_digi),
GFP_KERNEL);
if (nr_neigh->digipeat == NULL) {
kfree(nr_neigh);
if (nr_node)
nr_node_put(nr_node);
return -ENOMEM;
}
}
spin_lock_bh(&nr_neigh_list_lock);
hlist_add_head(&nr_neigh->neigh_node, &nr_neigh_list);
nr_neigh_hold(nr_neigh);
spin_unlock_bh(&nr_neigh_list_lock);
}
if (quality != 0 && ax25cmp(nr, ax25) == 0 && !nr_neigh->locked)
nr_neigh->quality = quality;
if (nr_node == NULL) {
if ((nr_node = kmalloc(sizeof(*nr_node), GFP_ATOMIC)) == NULL) {
if (nr_neigh)
nr_neigh_put(nr_neigh);
return -ENOMEM;
}
nr_node->callsign = *nr;
strscpy(nr_node->mnemonic, mnemonic);
nr_node->which = 0;
nr_node->count = 1;
refcount_set(&nr_node->refcount, 1);
spin_lock_init(&nr_node->node_lock);
nr_node->routes[0].quality = quality;
nr_node->routes[0].obs_count = obs_count;
nr_node->routes[0].neighbour = nr_neigh;
nr_neigh_hold(nr_neigh);
nr_neigh->count++;
spin_lock_bh(&nr_node_list_lock);
hlist_add_head(&nr_node->node_node, &nr_node_list);
/* refcount initialized at 1 */
spin_unlock_bh(&nr_node_list_lock);
nr_neigh_put(nr_neigh);
return 0;
}
nr_node_lock(nr_node);
if (quality != 0)
strscpy(nr_node->mnemonic, mnemonic);
for (found = 0, i = 0; i < nr_node->count; i++) {
if (nr_node->routes[i].neighbour == nr_neigh) {
nr_node->routes[i].quality = quality;
nr_node->routes[i].obs_count = obs_count;
found = 1;
break;
}
}
if (!found) {
/* We have space at the bottom, slot it in */
if (nr_node->count < 3) {
nr_node->routes[2] = nr_node->routes[1];
nr_node->routes[1] = nr_node->routes[0];
nr_node->routes[0].quality = quality;
nr_node->routes[0].obs_count = obs_count;
nr_node->routes[0].neighbour = nr_neigh;
nr_node->which++;
nr_node->count++;
nr_neigh_hold(nr_neigh);
nr_neigh->count++;
} else {
/* It must be better than the worst */
if (quality > nr_node->routes[2].quality) {
nr_node->routes[2].neighbour->count--;
nr_neigh_put(nr_node->routes[2].neighbour);
if (nr_node->routes[2].neighbour->count == 0 && !nr_node->routes[2].neighbour->locked)
nr_remove_neigh(nr_node->routes[2].neighbour);
nr_node->routes[2].quality = quality;
nr_node->routes[2].obs_count = obs_count;
nr_node->routes[2].neighbour = nr_neigh;
nr_neigh_hold(nr_neigh);
nr_neigh->count++;
}
}
}
/* Now re-sort the routes in quality order */
switch (nr_node->count) {
case 3:
re_sort_routes(nr_node, 0, 1);
re_sort_routes(nr_node, 1, 2);
fallthrough;
case 2:
re_sort_routes(nr_node, 0, 1);
break;
case 1:
break;
}
for (i = 0; i < nr_node->count; i++) {
if (nr_node->routes[i].neighbour == nr_neigh) {
if (i < nr_node->which)
nr_node->which = i;
break;
}
}
nr_neigh_put(nr_neigh);
nr_node_unlock(nr_node);
nr_node_put(nr_node);
return 0;
}
static void nr_remove_node_locked(struct nr_node *nr_node)
{
lockdep_assert_held(&nr_node_list_lock);
hlist_del_init(&nr_node->node_node);
nr_node_put(nr_node);
}
static inline void __nr_remove_neigh(struct nr_neigh *nr_neigh)
{
hlist_del_init(&nr_neigh->neigh_node);
nr_neigh_put(nr_neigh);
}
#define nr_remove_neigh_locked(__neigh) \
__nr_remove_neigh(__neigh)
static void nr_remove_neigh(struct nr_neigh *nr_neigh)
{
spin_lock_bh(&nr_neigh_list_lock);
__nr_remove_neigh(nr_neigh);
spin_unlock_bh(&nr_neigh_list_lock);
}
/*
* "Delete" a node. Strictly speaking remove a route to a node. The node
* is only deleted if no routes are left to it.
*/
static int nr_del_node(ax25_address *callsign, ax25_address *neighbour, struct net_device *dev)
{
struct nr_node *nr_node;
struct nr_neigh *nr_neigh;
int i;
nr_node = nr_node_get(callsign);
if (nr_node == NULL)
return -EINVAL;
nr_neigh = nr_neigh_get_dev(neighbour, dev);
if (nr_neigh == NULL) {
nr_node_put(nr_node);
return -EINVAL;
}
spin_lock_bh(&nr_node_list_lock);
nr_node_lock(nr_node);
for (i = 0; i < nr_node->count; i++) {
if (nr_node->routes[i].neighbour == nr_neigh) {
nr_neigh->count--;
nr_neigh_put(nr_neigh);
if (nr_neigh->count == 0 && !nr_neigh->locked)
nr_remove_neigh(nr_neigh);
nr_neigh_put(nr_neigh);
nr_node->count--;
if (nr_node->count == 0) {
nr_remove_node_locked(nr_node);
} else {
switch (i) {
case 0:
nr_node->routes[0] = nr_node->routes[1];
fallthrough;
case 1:
nr_node->routes[1] = nr_node->routes[2];
fallthrough;
case 2:
break;
}
nr_node_put(nr_node);
}
nr_node_unlock(nr_node);
spin_unlock_bh(&nr_node_list_lock);
return 0;
}
}
nr_neigh_put(nr_neigh);
nr_node_unlock(nr_node);
spin_unlock_bh(&nr_node_list_lock);
nr_node_put(nr_node);
return -EINVAL;
}
/*
* Lock a neighbour with a quality.
*/
static int __must_check nr_add_neigh(ax25_address *callsign,
ax25_digi *ax25_digi, struct net_device *dev, unsigned int quality)
{
struct nr_neigh *nr_neigh;
nr_neigh = nr_neigh_get_dev(callsign, dev);
if (nr_neigh) {
nr_neigh->quality = quality;
nr_neigh->locked = 1;
nr_neigh_put(nr_neigh);
return 0;
}
if ((nr_neigh = kmalloc(sizeof(*nr_neigh), GFP_ATOMIC)) == NULL)
return -ENOMEM;
nr_neigh->callsign = *callsign;
nr_neigh->digipeat = NULL;
nr_neigh->ax25 = NULL;
nr_neigh->dev = dev;
nr_neigh->quality = quality;
nr_neigh->locked = 1;
nr_neigh->count = 0;
nr_neigh->number = nr_neigh_no++;
nr_neigh->failed = 0;
refcount_set(&nr_neigh->refcount, 1);
if (ax25_digi != NULL && ax25_digi->ndigi > 0) {
nr_neigh->digipeat = kmemdup(ax25_digi, sizeof(*ax25_digi),
GFP_KERNEL);
if (nr_neigh->digipeat == NULL) {
kfree(nr_neigh);
return -ENOMEM;
}
}
spin_lock_bh(&nr_neigh_list_lock);
hlist_add_head(&nr_neigh->neigh_node, &nr_neigh_list);
/* refcount is initialized at 1 */
spin_unlock_bh(&nr_neigh_list_lock);
return 0;
}
/*
* "Delete" a neighbour. The neighbour is only removed if the number
* of nodes that may use it is zero.
*/
static int nr_del_neigh(ax25_address *callsign, struct net_device *dev, unsigned int quality)
{
struct nr_neigh *nr_neigh;
nr_neigh = nr_neigh_get_dev(callsign, dev);
if (nr_neigh == NULL) return -EINVAL;
nr_neigh->quality = quality;
nr_neigh->locked = 0;
if (nr_neigh->count == 0)
nr_remove_neigh(nr_neigh);
nr_neigh_put(nr_neigh);
return 0;
}
/*
* Decrement the obsolescence count by one. If a route is reduced to a
* count of zero, remove it. Also remove any unlocked neighbours with
* zero nodes routing via it.
*/
static int nr_dec_obs(void)
{
struct nr_neigh *nr_neigh;
struct nr_node *s;
struct hlist_node *nodet;
int i;
spin_lock_bh(&nr_node_list_lock);
nr_node_for_each_safe(s, nodet, &nr_node_list) {
nr_node_lock(s);
for (i = 0; i < s->count; i++) {
switch (s->routes[i].obs_count) {
case 0: /* A locked entry */
break;
case 1: /* From 1 -> 0 */
nr_neigh = s->routes[i].neighbour;
nr_neigh->count--;
nr_neigh_put(nr_neigh);
if (nr_neigh->count == 0 && !nr_neigh->locked)
nr_remove_neigh(nr_neigh);
s->count--;
switch (i) {
case 0:
s->routes[0] = s->routes[1];
fallthrough;
case 1:
s->routes[1] = s->routes[2];
break;
case 2:
break;
}
break;
default:
s->routes[i].obs_count--;
break;
}
}
if (s->count <= 0)
nr_remove_node_locked(s);
nr_node_unlock(s);
}
spin_unlock_bh(&nr_node_list_lock);
return 0;
}
/*
* A device has been removed. Remove its routes and neighbours.
*/
void nr_rt_device_down(struct net_device *dev)
{
struct nr_neigh *s;
struct hlist_node *nodet, *node2t;
struct nr_node *t;
int i;
spin_lock_bh(&nr_neigh_list_lock);
nr_neigh_for_each_safe(s, nodet, &nr_neigh_list) {
if (s->dev == dev) {
spin_lock_bh(&nr_node_list_lock);
nr_node_for_each_safe(t, node2t, &nr_node_list) {
nr_node_lock(t);
for (i = 0; i < t->count; i++) {
if (t->routes[i].neighbour == s) {
t->count--;
switch (i) {
case 0:
t->routes[0] = t->routes[1];
fallthrough;
case 1:
t->routes[1] = t->routes[2];
break;
case 2:
break;
}
}
}
if (t->count <= 0)
nr_remove_node_locked(t);
nr_node_unlock(t);
}
spin_unlock_bh(&nr_node_list_lock);
nr_remove_neigh_locked(s);
}
}
spin_unlock_bh(&nr_neigh_list_lock);
}
/*
* Check that the device given is a valid AX.25 interface that is "up".
* Or a valid ethernet interface with an AX.25 callsign binding.
*/
static struct net_device *nr_ax25_dev_get(char *devname)
{
struct net_device *dev;
if ((dev = dev_get_by_name(&init_net, devname)) == NULL)
return NULL;
if ((dev->flags & IFF_UP) && dev->type == ARPHRD_AX25)
return dev;
dev_put(dev);
return NULL;
}
/*
* Find the first active NET/ROM device, usually "nr0".
*/
struct net_device *nr_dev_first(void)
{
struct net_device *dev, *first = NULL;
rcu_read_lock();
for_each_netdev_rcu(&init_net, dev) {
if ((dev->flags & IFF_UP) && dev->type == ARPHRD_NETROM)
if (first == NULL || strncmp(dev->name, first->name, 3) < 0)
first = dev;
}
dev_hold(first);
rcu_read_unlock();
return first;
}
/*
* Find the NET/ROM device for the given callsign.
*/
struct net_device *nr_dev_get(ax25_address *addr)
{
struct net_device *dev;
rcu_read_lock();
for_each_netdev_rcu(&init_net, dev) {
if ((dev->flags & IFF_UP) && dev->type == ARPHRD_NETROM &&
ax25cmp(addr, (const ax25_address *)dev->dev_addr) == 0) {
dev_hold(dev);
goto out;
}
}
dev = NULL;
out:
rcu_read_unlock();
return dev;
}
static ax25_digi *nr_call_to_digi(ax25_digi *digi, int ndigis,
ax25_address *digipeaters)
{
int i;
if (ndigis == 0)
return NULL;
for (i = 0; i < ndigis; i++) {
digi->calls[i] = digipeaters[i];
digi->repeated[i] = 0;
}
digi->ndigi = ndigis;
digi->lastrepeat = -1;
return digi;
}
/*
* Handle the ioctls that control the routing functions.
*/
int nr_rt_ioctl(unsigned int cmd, void __user *arg)
{
struct nr_route_struct nr_route;
struct net_device *dev;
ax25_digi digi;
int ret;
switch (cmd) {
case SIOCADDRT:
if (copy_from_user(&nr_route, arg, sizeof(struct nr_route_struct)))
return -EFAULT;
if (nr_route.ndigis > AX25_MAX_DIGIS)
return -EINVAL;
if ((dev = nr_ax25_dev_get(nr_route.device)) == NULL)
return -EINVAL;
switch (nr_route.type) {
case NETROM_NODE:
if (strnlen(nr_route.mnemonic, 7) == 7) {
ret = -EINVAL;
break;
}
ret = nr_add_node(&nr_route.callsign,
nr_route.mnemonic,
&nr_route.neighbour,
nr_call_to_digi(&digi, nr_route.ndigis,
nr_route.digipeaters),
dev, nr_route.quality,
nr_route.obs_count);
break;
case NETROM_NEIGH:
ret = nr_add_neigh(&nr_route.callsign,
nr_call_to_digi(&digi, nr_route.ndigis,
nr_route.digipeaters),
dev, nr_route.quality);
break;
default:
ret = -EINVAL;
}
dev_put(dev);
return ret;
case SIOCDELRT:
if (copy_from_user(&nr_route, arg, sizeof(struct nr_route_struct)))
return -EFAULT;
if ((dev = nr_ax25_dev_get(nr_route.device)) == NULL)
return -EINVAL;
switch (nr_route.type) {
case NETROM_NODE:
ret = nr_del_node(&nr_route.callsign,
&nr_route.neighbour, dev);
break;
case NETROM_NEIGH:
ret = nr_del_neigh(&nr_route.callsign,
dev, nr_route.quality);
break;
default:
ret = -EINVAL;
}
dev_put(dev);
return ret;
case SIOCNRDECOBS:
return nr_dec_obs();
default:
return -EINVAL;
}
return 0;
}
/*
* A level 2 link has timed out, therefore it appears to be a poor link,
* then don't use that neighbour until it is reset.
*/
void nr_link_failed(ax25_cb *ax25, int reason)
{
struct nr_neigh *s, *nr_neigh = NULL;
struct nr_node *nr_node = NULL;
spin_lock_bh(&nr_neigh_list_lock);
nr_neigh_for_each(s, &nr_neigh_list) {
if (s->ax25 == ax25) {
nr_neigh_hold(s);
nr_neigh = s;
break;
}
}
spin_unlock_bh(&nr_neigh_list_lock);
if (nr_neigh == NULL)
return;
nr_neigh->ax25 = NULL;
ax25_cb_put(ax25);
if (++nr_neigh->failed < READ_ONCE(sysctl_netrom_link_fails_count)) {
nr_neigh_put(nr_neigh);
return;
}
spin_lock_bh(&nr_node_list_lock);
nr_node_for_each(nr_node, &nr_node_list) {
nr_node_lock(nr_node);
if (nr_node->which < nr_node->count &&
nr_node->routes[nr_node->which].neighbour == nr_neigh)
nr_node->which++;
nr_node_unlock(nr_node);
}
spin_unlock_bh(&nr_node_list_lock);
nr_neigh_put(nr_neigh);
}
/*
* Route a frame to an appropriate AX.25 connection. A NULL ax25_cb
* indicates an internally generated frame.
*/
int nr_route_frame(struct sk_buff *skb, ax25_cb *ax25)
{
ax25_address *nr_src, *nr_dest;
struct nr_neigh *nr_neigh;
struct nr_node *nr_node;
struct net_device *dev;
unsigned char *dptr;
ax25_cb *ax25s;
int ret;
struct sk_buff *nskb, *oskb;
/*
* Reject malformed packets early. Check that it contains at least 2
* addresses and 1 byte more for Time-To-Live
*/
if (skb->len < 2 * sizeof(ax25_address) + 1)
return 0;
nr_src = (ax25_address *)(skb->data + 0);
nr_dest = (ax25_address *)(skb->data + 7);
if (ax25 != NULL) {
ret = nr_add_node(nr_src, "", &ax25->dest_addr, ax25->digipeat,
ax25->ax25_dev->dev, 0,
READ_ONCE(sysctl_netrom_obsolescence_count_initialiser));
if (ret)
return ret;
}
if ((dev = nr_dev_get(nr_dest)) != NULL) { /* Its for me */
if (ax25 == NULL) /* Its from me */
ret = nr_loopback_queue(skb);
else
ret = nr_rx_frame(skb, dev);
dev_put(dev);
return ret;
}
if (!READ_ONCE(sysctl_netrom_routing_control) && ax25 != NULL)
return 0;
/* Its Time-To-Live has expired */
if (skb->data[14] == 1) {
return 0;
}
nr_node = nr_node_get(nr_dest);
if (nr_node == NULL)
return 0;
nr_node_lock(nr_node);
if (nr_node->which >= nr_node->count) {
nr_node_unlock(nr_node);
nr_node_put(nr_node);
return 0;
}
nr_neigh = nr_node->routes[nr_node->which].neighbour;
if ((dev = nr_dev_first()) == NULL) {
nr_node_unlock(nr_node);
nr_node_put(nr_node);
return 0;
}
/* We are going to change the netrom headers so we should get our
own skb, we also did not know until now how much header space
we had to reserve... - RXQ */
nskb = skb_copy_expand(skb, dev->hard_header_len, 0, GFP_ATOMIC);
if (!nskb) {
nr_node_unlock(nr_node);
nr_node_put(nr_node);
dev_put(dev);
return 0;
}
oskb = skb;
skb = nskb;
skb->data[14]--;
dptr = skb_push(skb, 1);
*dptr = AX25_P_NETROM;
ax25s = nr_neigh->ax25;
nr_neigh->ax25 = ax25_send_frame(skb, 256,
(const ax25_address *)dev->dev_addr,
&nr_neigh->callsign,
nr_neigh->digipeat, nr_neigh->dev);
if (ax25s)
ax25_cb_put(ax25s);
dev_put(dev);
ret = (nr_neigh->ax25 != NULL);
nr_node_unlock(nr_node);
nr_node_put(nr_node);
if (ret)
kfree_skb(oskb);
return ret;
}
#ifdef CONFIG_PROC_FS
static void *nr_node_start(struct seq_file *seq, loff_t *pos)
__acquires(&nr_node_list_lock)
{
spin_lock_bh(&nr_node_list_lock);
return seq_hlist_start_head(&nr_node_list, *pos);
}
static void *nr_node_next(struct seq_file *seq, void *v, loff_t *pos)
{
return seq_hlist_next(v, &nr_node_list, pos);
}
static void nr_node_stop(struct seq_file *seq, void *v)
__releases(&nr_node_list_lock)
{
spin_unlock_bh(&nr_node_list_lock);
}
static int nr_node_show(struct seq_file *seq, void *v)
{
char buf[11];
int i;
if (v == SEQ_START_TOKEN)
seq_puts(seq,
"callsign mnemonic w n qual obs neigh qual obs neigh qual obs neigh\n");
else {
struct nr_node *nr_node = hlist_entry(v, struct nr_node,
node_node);
nr_node_lock(nr_node);
seq_printf(seq, "%-9s %-7s %d %d",
ax2asc(buf, &nr_node->callsign),
(nr_node->mnemonic[0] == '\0') ? "*" : nr_node->mnemonic,
nr_node->which + 1,
nr_node->count);
for (i = 0; i < nr_node->count; i++) {
seq_printf(seq, " %3d %d %05d",
nr_node->routes[i].quality,
nr_node->routes[i].obs_count,
nr_node->routes[i].neighbour->number);
}
nr_node_unlock(nr_node);
seq_puts(seq, "\n");
}
return 0;
}
const struct seq_operations nr_node_seqops = {
.start = nr_node_start,
.next = nr_node_next,
.stop = nr_node_stop,
.show = nr_node_show,
};
static void *nr_neigh_start(struct seq_file *seq, loff_t *pos)
__acquires(&nr_neigh_list_lock)
{
spin_lock_bh(&nr_neigh_list_lock);
return seq_hlist_start_head(&nr_neigh_list, *pos);
}
static void *nr_neigh_next(struct seq_file *seq, void *v, loff_t *pos)
{
return seq_hlist_next(v, &nr_neigh_list, pos);
}
static void nr_neigh_stop(struct seq_file *seq, void *v)
__releases(&nr_neigh_list_lock)
{
spin_unlock_bh(&nr_neigh_list_lock);
}
static int nr_neigh_show(struct seq_file *seq, void *v)
{
char buf[11];
int i;
if (v == SEQ_START_TOKEN)
seq_puts(seq, "addr callsign dev qual lock count failed digipeaters\n");
else {
struct nr_neigh *nr_neigh;
nr_neigh = hlist_entry(v, struct nr_neigh, neigh_node);
seq_printf(seq, "%05d %-9s %-4s %3d %d %3d %3d",
nr_neigh->number,
ax2asc(buf, &nr_neigh->callsign),
nr_neigh->dev ? nr_neigh->dev->name : "???",
nr_neigh->quality,
nr_neigh->locked,
nr_neigh->count,
nr_neigh->failed);
if (nr_neigh->digipeat != NULL) {
for (i = 0; i < nr_neigh->digipeat->ndigi; i++)
seq_printf(seq, " %s",
ax2asc(buf, &nr_neigh->digipeat->calls[i]));
}
seq_puts(seq, "\n");
}
return 0;
}
const struct seq_operations nr_neigh_seqops = {
.start = nr_neigh_start,
.next = nr_neigh_next,
.stop = nr_neigh_stop,
.show = nr_neigh_show,
};
#endif
/*
* Free all memory associated with the nodes and routes lists.
*/
void nr_rt_free(void)
{
struct nr_neigh *s = NULL;
struct nr_node *t = NULL;
struct hlist_node *nodet;
spin_lock_bh(&nr_neigh_list_lock);
spin_lock_bh(&nr_node_list_lock);
nr_node_for_each_safe(t, nodet, &nr_node_list) {
nr_node_lock(t);
nr_remove_node_locked(t);
nr_node_unlock(t);
}
nr_neigh_for_each_safe(s, nodet, &nr_neigh_list) {
while(s->count) {
s->count--;
nr_neigh_put(s);
}
nr_remove_neigh_locked(s);
}
spin_unlock_bh(&nr_node_list_lock);
spin_unlock_bh(&nr_neigh_list_lock);
}

280
net/netrom/nr_subr.c
View File

@ -1,280 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/slab.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <net/netrom.h>
/*
* This routine purges all of the queues of frames.
*/
void nr_clear_queues(struct sock *sk)
{
struct nr_sock *nr = nr_sk(sk);
skb_queue_purge(&sk->sk_write_queue);
skb_queue_purge(&nr->ack_queue);
skb_queue_purge(&nr->reseq_queue);
skb_queue_purge(&nr->frag_queue);
}
/*
* This routine purges the input queue of those frames that have been
* acknowledged. This replaces the boxes labelled "V(a) <- N(r)" on the
* SDL diagram.
*/
void nr_frames_acked(struct sock *sk, unsigned short nr)
{
struct nr_sock *nrom = nr_sk(sk);
struct sk_buff *skb;
/*
* Remove all the ack-ed frames from the ack queue.
*/
if (nrom->va != nr) {
while (skb_peek(&nrom->ack_queue) != NULL && nrom->va != nr) {
skb = skb_dequeue(&nrom->ack_queue);
kfree_skb(skb);
nrom->va = (nrom->va + 1) % NR_MODULUS;
}
}
}
/*
* Requeue all the un-ack-ed frames on the output queue to be picked
* up by nr_kick called from the timer. This arrangement handles the
* possibility of an empty output queue.
*/
void nr_requeue_frames(struct sock *sk)
{
struct sk_buff *skb, *skb_prev = NULL;
while ((skb = skb_dequeue(&nr_sk(sk)->ack_queue)) != NULL) {
if (skb_prev == NULL)
skb_queue_head(&sk->sk_write_queue, skb);
else
skb_append(skb_prev, skb, &sk->sk_write_queue);
skb_prev = skb;
}
}
/*
* Validate that the value of nr is between va and vs. Return true or
* false for testing.
*/
int nr_validate_nr(struct sock *sk, unsigned short nr)
{
struct nr_sock *nrom = nr_sk(sk);
unsigned short vc = nrom->va;
while (vc != nrom->vs) {
if (nr == vc) return 1;
vc = (vc + 1) % NR_MODULUS;
}
return nr == nrom->vs;
}
/*
* Check that ns is within the receive window.
*/
int nr_in_rx_window(struct sock *sk, unsigned short ns)
{
struct nr_sock *nr = nr_sk(sk);
unsigned short vc = nr->vr;
unsigned short vt = (nr->vl + nr->window) % NR_MODULUS;
while (vc != vt) {
if (ns == vc) return 1;
vc = (vc + 1) % NR_MODULUS;
}
return 0;
}
/*
* This routine is called when the HDLC layer internally generates a
* control frame.
*/
void nr_write_internal(struct sock *sk, int frametype)
{
struct nr_sock *nr = nr_sk(sk);
struct sk_buff *skb;
unsigned char *dptr;
int len, timeout;
len = NR_TRANSPORT_LEN;
switch (frametype & 0x0F) {
case NR_CONNREQ:
len += 17;
break;
case NR_CONNACK:
len += (nr->bpqext) ? 2 : 1;
break;
case NR_DISCREQ:
case NR_DISCACK:
case NR_INFOACK:
break;
default:
printk(KERN_ERR "NET/ROM: nr_write_internal - invalid frame type %d\n", frametype);
return;
}
skb = alloc_skb(NR_NETWORK_LEN + len, GFP_ATOMIC);
if (!skb)
return;
/*
* Space for AX.25 and NET/ROM network header
*/
skb_reserve(skb, NR_NETWORK_LEN);
dptr = skb_put(skb, len);
switch (frametype & 0x0F) {
case NR_CONNREQ:
timeout = nr->t1 / HZ;
*dptr++ = nr->my_index;
*dptr++ = nr->my_id;
*dptr++ = 0;
*dptr++ = 0;
*dptr++ = frametype;
*dptr++ = nr->window;
memcpy(dptr, &nr->user_addr, AX25_ADDR_LEN);
dptr[6] &= ~AX25_CBIT;
dptr[6] &= ~AX25_EBIT;
dptr[6] |= AX25_SSSID_SPARE;
dptr += AX25_ADDR_LEN;
memcpy(dptr, &nr->source_addr, AX25_ADDR_LEN);
dptr[6] &= ~AX25_CBIT;
dptr[6] &= ~AX25_EBIT;
dptr[6] |= AX25_SSSID_SPARE;
dptr += AX25_ADDR_LEN;
*dptr++ = timeout % 256;
*dptr++ = timeout / 256;
break;
case NR_CONNACK:
*dptr++ = nr->your_index;
*dptr++ = nr->your_id;
*dptr++ = nr->my_index;
*dptr++ = nr->my_id;
*dptr++ = frametype;
*dptr++ = nr->window;
if (nr->bpqext)
*dptr++ = READ_ONCE(sysctl_netrom_network_ttl_initialiser);
break;
case NR_DISCREQ:
case NR_DISCACK:
*dptr++ = nr->your_index;
*dptr++ = nr->your_id;
*dptr++ = 0;
*dptr++ = 0;
*dptr++ = frametype;
break;
case NR_INFOACK:
*dptr++ = nr->your_index;
*dptr++ = nr->your_id;
*dptr++ = 0;
*dptr++ = nr->vr;
*dptr++ = frametype;
break;
}
nr_transmit_buffer(sk, skb);
}
/*
* This routine is called to send an error reply.
*/
void __nr_transmit_reply(struct sk_buff *skb, int mine, unsigned char cmdflags)
{
struct sk_buff *skbn;
unsigned char *dptr;
int len;
len = NR_NETWORK_LEN + NR_TRANSPORT_LEN + 1;
if ((skbn = alloc_skb(len, GFP_ATOMIC)) == NULL)
return;
skb_reserve(skbn, 0);
dptr = skb_put(skbn, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
skb_copy_from_linear_data_offset(skb, 7, dptr, AX25_ADDR_LEN);
dptr[6] &= ~AX25_CBIT;
dptr[6] &= ~AX25_EBIT;
dptr[6] |= AX25_SSSID_SPARE;
dptr += AX25_ADDR_LEN;
skb_copy_from_linear_data(skb, dptr, AX25_ADDR_LEN);
dptr[6] &= ~AX25_CBIT;
dptr[6] |= AX25_EBIT;
dptr[6] |= AX25_SSSID_SPARE;
dptr += AX25_ADDR_LEN;
*dptr++ = READ_ONCE(sysctl_netrom_network_ttl_initialiser);
if (mine) {
*dptr++ = 0;
*dptr++ = 0;
*dptr++ = skb->data[15];
*dptr++ = skb->data[16];
} else {
*dptr++ = skb->data[15];
*dptr++ = skb->data[16];
*dptr++ = 0;
*dptr++ = 0;
}
*dptr++ = cmdflags;
*dptr++ = 0;
if (!nr_route_frame(skbn, NULL))
kfree_skb(skbn);
}
void nr_disconnect(struct sock *sk, int reason)
{
nr_stop_t1timer(sk);
nr_stop_t2timer(sk);
nr_stop_t4timer(sk);
nr_stop_idletimer(sk);
nr_clear_queues(sk);
nr_sk(sk)->state = NR_STATE_0;
sk->sk_state = TCP_CLOSE;
sk->sk_err = reason;
sk->sk_shutdown |= SEND_SHUTDOWN;
if (!sock_flag(sk, SOCK_DEAD)) {
sk->sk_state_change(sk);
sock_set_flag(sk, SOCK_DEAD);
}
}

249
net/netrom/nr_timer.c
View File

@ -1,249 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
* Copyright (C) 2002 Ralf Baechle DO1GRB (ralf@gnu.org)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/jiffies.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <net/netrom.h>
static void nr_heartbeat_expiry(struct timer_list *);
static void nr_t1timer_expiry(struct timer_list *);
static void nr_t2timer_expiry(struct timer_list *);
static void nr_t4timer_expiry(struct timer_list *);
static void nr_idletimer_expiry(struct timer_list *);
void nr_init_timers(struct sock *sk)
{
struct nr_sock *nr = nr_sk(sk);
timer_setup(&nr->t1timer, nr_t1timer_expiry, 0);
timer_setup(&nr->t2timer, nr_t2timer_expiry, 0);
timer_setup(&nr->t4timer, nr_t4timer_expiry, 0);
timer_setup(&nr->idletimer, nr_idletimer_expiry, 0);
/* initialized by sock_init_data */
sk->sk_timer.function = nr_heartbeat_expiry;
}
void nr_start_t1timer(struct sock *sk)
{
struct nr_sock *nr = nr_sk(sk);
sk_reset_timer(sk, &nr->t1timer, jiffies + nr->t1);
}
void nr_start_t2timer(struct sock *sk)
{
struct nr_sock *nr = nr_sk(sk);
sk_reset_timer(sk, &nr->t2timer, jiffies + nr->t2);
}
void nr_start_t4timer(struct sock *sk)
{
struct nr_sock *nr = nr_sk(sk);
sk_reset_timer(sk, &nr->t4timer, jiffies + nr->t4);
}
void nr_start_idletimer(struct sock *sk)
{
struct nr_sock *nr = nr_sk(sk);
if (nr->idle > 0)
sk_reset_timer(sk, &nr->idletimer, jiffies + nr->idle);
}
void nr_start_heartbeat(struct sock *sk)
{
sk_reset_timer(sk, &sk->sk_timer, jiffies + 5 * HZ);
}
void nr_stop_t1timer(struct sock *sk)
{
sk_stop_timer(sk, &nr_sk(sk)->t1timer);
}
void nr_stop_t2timer(struct sock *sk)
{
sk_stop_timer(sk, &nr_sk(sk)->t2timer);
}
void nr_stop_t4timer(struct sock *sk)
{
sk_stop_timer(sk, &nr_sk(sk)->t4timer);
}
void nr_stop_idletimer(struct sock *sk)
{
sk_stop_timer(sk, &nr_sk(sk)->idletimer);
}
void nr_stop_heartbeat(struct sock *sk)
{
sk_stop_timer(sk, &sk->sk_timer);
}
int nr_t1timer_running(struct sock *sk)
{
return timer_pending(&nr_sk(sk)->t1timer);
}
static void nr_heartbeat_expiry(struct timer_list *t)
{
struct sock *sk = timer_container_of(sk, t, sk_timer);
struct nr_sock *nr = nr_sk(sk);
bh_lock_sock(sk);
switch (nr->state) {
case NR_STATE_0:
/* Magic here: If we listen() and a new link dies before it
is accepted() it isn't 'dead' so doesn't get removed. */
if (sock_flag(sk, SOCK_DESTROY) ||
(sk->sk_state == TCP_LISTEN && sock_flag(sk, SOCK_DEAD))) {
if (sk->sk_state == TCP_LISTEN)
sock_hold(sk);
bh_unlock_sock(sk);
nr_destroy_socket(sk);
goto out;
}
break;
case NR_STATE_3:
/*
* Check for the state of the receive buffer.
*/
if (atomic_read(&sk->sk_rmem_alloc) < (sk->sk_rcvbuf / 2) &&
(nr->condition & NR_COND_OWN_RX_BUSY)) {
nr->condition &= ~NR_COND_OWN_RX_BUSY;
nr->condition &= ~NR_COND_ACK_PENDING;
nr->vl = nr->vr;
nr_write_internal(sk, NR_INFOACK);
break;
}
break;
}
nr_start_heartbeat(sk);
bh_unlock_sock(sk);
out:
sock_put(sk);
}
static void nr_t2timer_expiry(struct timer_list *t)
{
struct nr_sock *nr = timer_container_of(nr, t, t2timer);
struct sock *sk = &nr->sock;
bh_lock_sock(sk);
if (nr->condition & NR_COND_ACK_PENDING) {
nr->condition &= ~NR_COND_ACK_PENDING;
nr_enquiry_response(sk);
}
bh_unlock_sock(sk);
sock_put(sk);
}
static void nr_t4timer_expiry(struct timer_list *t)
{
struct nr_sock *nr = timer_container_of(nr, t, t4timer);
struct sock *sk = &nr->sock;
bh_lock_sock(sk);
nr_sk(sk)->condition &= ~NR_COND_PEER_RX_BUSY;
bh_unlock_sock(sk);
sock_put(sk);
}
static void nr_idletimer_expiry(struct timer_list *t)
{
struct nr_sock *nr = timer_container_of(nr, t, idletimer);
struct sock *sk = &nr->sock;
bh_lock_sock(sk);
nr_clear_queues(sk);
nr->n2count = 0;
nr_write_internal(sk, NR_DISCREQ);
nr->state = NR_STATE_2;
nr_start_t1timer(sk);
nr_stop_t2timer(sk);
nr_stop_t4timer(sk);
sk->sk_state = TCP_CLOSE;
sk->sk_err = 0;
sk->sk_shutdown |= SEND_SHUTDOWN;
if (!sock_flag(sk, SOCK_DEAD)) {
sk->sk_state_change(sk);
sock_set_flag(sk, SOCK_DEAD);
}
bh_unlock_sock(sk);
sock_put(sk);
}
static void nr_t1timer_expiry(struct timer_list *t)
{
struct nr_sock *nr = timer_container_of(nr, t, t1timer);
struct sock *sk = &nr->sock;
bh_lock_sock(sk);
switch (nr->state) {
case NR_STATE_1:
if (nr->n2count == nr->n2) {
nr_disconnect(sk, ETIMEDOUT);
goto out;
} else {
nr->n2count++;
nr_write_internal(sk, NR_CONNREQ);
}
break;
case NR_STATE_2:
if (nr->n2count == nr->n2) {
nr_disconnect(sk, ETIMEDOUT);
goto out;
} else {
nr->n2count++;
nr_write_internal(sk, NR_DISCREQ);
}
break;
case NR_STATE_3:
if (nr->n2count == nr->n2) {
nr_disconnect(sk, ETIMEDOUT);
goto out;
} else {
nr->n2count++;
nr_requeue_frames(sk);
}
break;
}
nr_start_t1timer(sk);
out:
bh_unlock_sock(sk);
sock_put(sk);
}

156
net/netrom/sysctl_net_netrom.c
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@ -1,156 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) 1996 Mike Shaver (shaver@zeroknowledge.com)
*/
#include <linux/mm.h>
#include <linux/sysctl.h>
#include <linux/init.h>
#include <net/ax25.h>
#include <net/netrom.h>
/*
* Values taken from NET/ROM documentation.
*/
static int min_quality[] = {0}, max_quality[] = {255};
static int min_obs[] = {0}, max_obs[] = {255};
static int min_ttl[] = {0}, max_ttl[] = {255};
static int min_t1[] = {5 * HZ};
static int max_t1[] = {600 * HZ};
static int min_n2[] = {2}, max_n2[] = {127};
static int min_t2[] = {1 * HZ};
static int max_t2[] = {60 * HZ};
static int min_t4[] = {1 * HZ};
static int max_t4[] = {1000 * HZ};
static int min_window[] = {1}, max_window[] = {127};
static int min_idle[] = {0 * HZ};
static int max_idle[] = {65535 * HZ};
static int min_route[] = {0}, max_route[] = {1};
static int min_fails[] = {1}, max_fails[] = {10};
static int min_reset[] = {0}, max_reset[] = {1};
static struct ctl_table_header *nr_table_header;
static struct ctl_table nr_table[] = {
{
.procname = "default_path_quality",
.data = &sysctl_netrom_default_path_quality,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_quality,
.extra2 = &max_quality
},
{
.procname = "obsolescence_count_initialiser",
.data = &sysctl_netrom_obsolescence_count_initialiser,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_obs,
.extra2 = &max_obs
},
{
.procname = "network_ttl_initialiser",
.data = &sysctl_netrom_network_ttl_initialiser,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_ttl,
.extra2 = &max_ttl
},
{
.procname = "transport_timeout",
.data = &sysctl_netrom_transport_timeout,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_t1,
.extra2 = &max_t1
},
{
.procname = "transport_maximum_tries",
.data = &sysctl_netrom_transport_maximum_tries,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_n2,
.extra2 = &max_n2
},
{
.procname = "transport_acknowledge_delay",
.data = &sysctl_netrom_transport_acknowledge_delay,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_t2,
.extra2 = &max_t2
},
{
.procname = "transport_busy_delay",
.data = &sysctl_netrom_transport_busy_delay,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_t4,
.extra2 = &max_t4
},
{
.procname = "transport_requested_window_size",
.data = &sysctl_netrom_transport_requested_window_size,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_window,
.extra2 = &max_window
},
{
.procname = "transport_no_activity_timeout",
.data = &sysctl_netrom_transport_no_activity_timeout,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_idle,
.extra2 = &max_idle
},
{
.procname = "routing_control",
.data = &sysctl_netrom_routing_control,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_route,
.extra2 = &max_route
},
{
.procname = "link_fails_count",
.data = &sysctl_netrom_link_fails_count,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_fails,
.extra2 = &max_fails
},
{
.procname = "reset",
.data = &sysctl_netrom_reset_circuit,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_reset,
.extra2 = &max_reset
},
};
int __init nr_register_sysctl(void)
{
nr_table_header = register_net_sysctl(&init_net, "net/netrom", nr_table);
if (!nr_table_header)
return -ENOMEM;
return 0;
}
void nr_unregister_sysctl(void)
{
unregister_net_sysctl_table(nr_table_header);
}

10
net/rose/Makefile
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@ -1,10 +0,0 @@
# SPDX-License-Identifier: GPL-2.0-only
#
# Makefile for the Linux Rose (X.25 PLP) layer.
#
obj-$(CONFIG_ROSE) += rose.o
rose-y := af_rose.o rose_dev.o rose_in.o rose_link.o rose_loopback.o \
rose_out.o rose_route.o rose_subr.o rose_timer.o
rose-$(CONFIG_SYSCTL) += sysctl_net_rose.o

1687
net/rose/af_rose.c
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File diff suppressed because it is too large Load Diff

141
net/rose/rose_dev.c
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@ -1,141 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
*/
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/fs.h>
#include <linux/types.h>
#include <linux/sysctl.h>
#include <linux/string.h>
#include <linux/socket.h>
#include <linux/errno.h>
#include <linux/fcntl.h>
#include <linux/in.h>
#include <linux/if_ether.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/skbuff.h>
#include <net/ip.h>
#include <net/arp.h>
#include <net/ax25.h>
#include <net/rose.h>
static int rose_header(struct sk_buff *skb, struct net_device *dev,
unsigned short type,
const void *daddr, const void *saddr, unsigned int len)
{
unsigned char *buff = skb_push(skb, ROSE_MIN_LEN + 2);
if (daddr)
memcpy(buff + 7, daddr, dev->addr_len);
*buff++ = ROSE_GFI | ROSE_Q_BIT;
*buff++ = 0x00;
*buff++ = ROSE_DATA;
*buff++ = 0x7F;
*buff++ = AX25_P_IP;
if (daddr != NULL)
return 37;
return -37;
}
static int rose_set_mac_address(struct net_device *dev, void *addr)
{
struct sockaddr *sa = addr;
int err;
if (!memcmp(dev->dev_addr, sa->sa_data, dev->addr_len))
return 0;
if (dev->flags & IFF_UP) {
err = rose_add_loopback_node((rose_address *)sa->sa_data);
if (err)
return err;
rose_del_loopback_node((const rose_address *)dev->dev_addr);
}
dev_addr_set(dev, sa->sa_data);
return 0;
}
static int rose_open(struct net_device *dev)
{
int err;
err = rose_add_loopback_node((const rose_address *)dev->dev_addr);
if (err)
return err;
netif_start_queue(dev);
return 0;
}
static int rose_close(struct net_device *dev)
{
netif_stop_queue(dev);
rose_del_loopback_node((const rose_address *)dev->dev_addr);
return 0;
}
static netdev_tx_t rose_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct net_device_stats *stats = &dev->stats;
unsigned int len = skb->len;
if (!netif_running(dev)) {
printk(KERN_ERR "ROSE: rose_xmit - called when iface is down\n");
return NETDEV_TX_BUSY;
}
if (!rose_route_frame(skb, NULL)) {
dev_kfree_skb(skb);
stats->tx_errors++;
return NETDEV_TX_OK;
}
stats->tx_packets++;
stats->tx_bytes += len;
return NETDEV_TX_OK;
}
static const struct header_ops rose_header_ops = {
.create = rose_header,
};
static const struct net_device_ops rose_netdev_ops = {
.ndo_open = rose_open,
.ndo_stop = rose_close,
.ndo_start_xmit = rose_xmit,
.ndo_set_mac_address = rose_set_mac_address,
};
void rose_setup(struct net_device *dev)
{
dev->mtu = ROSE_MAX_PACKET_SIZE - 2;
dev->netdev_ops = &rose_netdev_ops;
dev->header_ops = &rose_header_ops;
dev->hard_header_len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
dev->addr_len = ROSE_ADDR_LEN;
dev->type = ARPHRD_ROSE;
/* New-style flags. */
dev->flags = IFF_NOARP;
}

301
net/rose/rose_in.c
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@ -1,301 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
*
* Most of this code is based on the SDL diagrams published in the 7th ARRL
* Computer Networking Conference papers. The diagrams have mistakes in them,
* but are mostly correct. Before you modify the code could you read the SDL
* diagrams as the code is not obvious and probably very easy to break.
*/
#include <linux/errno.h>
#include <linux/filter.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <net/rose.h>
/*
* State machine for state 1, Awaiting Call Accepted State.
* The handling of the timer(s) is in file rose_timer.c.
* Handling of state 0 and connection release is in af_rose.c.
*/
static int rose_state1_machine(struct sock *sk, struct sk_buff *skb, int frametype)
{
struct rose_sock *rose = rose_sk(sk);
switch (frametype) {
case ROSE_CALL_ACCEPTED:
rose_stop_timer(sk);
rose_start_idletimer(sk);
rose->condition = 0x00;
rose->vs = 0;
rose->va = 0;
rose->vr = 0;
rose->vl = 0;
rose->state = ROSE_STATE_3;
sk->sk_state = TCP_ESTABLISHED;
if (!sock_flag(sk, SOCK_DEAD))
sk->sk_state_change(sk);
break;
case ROSE_CLEAR_REQUEST:
rose_write_internal(sk, ROSE_CLEAR_CONFIRMATION);
rose_disconnect(sk, ECONNREFUSED, skb->data[3], skb->data[4]);
rose_neigh_put(rose->neighbour);
break;
default:
break;
}
return 0;
}
/*
* State machine for state 2, Awaiting Clear Confirmation State.
* The handling of the timer(s) is in file rose_timer.c
* Handling of state 0 and connection release is in af_rose.c.
*/
static int rose_state2_machine(struct sock *sk, struct sk_buff *skb, int frametype)
{
struct rose_sock *rose = rose_sk(sk);
switch (frametype) {
case ROSE_CLEAR_REQUEST:
rose_write_internal(sk, ROSE_CLEAR_CONFIRMATION);
rose_disconnect(sk, 0, skb->data[3], skb->data[4]);
rose_neigh_put(rose->neighbour);
break;
case ROSE_CLEAR_CONFIRMATION:
rose_disconnect(sk, 0, -1, -1);
rose_neigh_put(rose->neighbour);
break;
default:
break;
}
return 0;
}
/*
* State machine for state 3, Connected State.
* The handling of the timer(s) is in file rose_timer.c
* Handling of state 0 and connection release is in af_rose.c.
*/
static int rose_state3_machine(struct sock *sk, struct sk_buff *skb, int frametype, int ns, int nr, int q, int d, int m)
{
struct rose_sock *rose = rose_sk(sk);
int queued = 0;
switch (frametype) {
case ROSE_RESET_REQUEST:
rose_stop_timer(sk);
rose_start_idletimer(sk);
rose_write_internal(sk, ROSE_RESET_CONFIRMATION);
rose->condition = 0x00;
rose->vs = 0;
rose->vr = 0;
rose->va = 0;
rose->vl = 0;
rose_requeue_frames(sk);
break;
case ROSE_CLEAR_REQUEST:
rose_write_internal(sk, ROSE_CLEAR_CONFIRMATION);
rose_disconnect(sk, 0, skb->data[3], skb->data[4]);
rose_neigh_put(rose->neighbour);
break;
case ROSE_RR:
case ROSE_RNR:
if (!rose_validate_nr(sk, nr)) {
rose_write_internal(sk, ROSE_RESET_REQUEST);
rose->condition = 0x00;
rose->vs = 0;
rose->vr = 0;
rose->va = 0;
rose->vl = 0;
rose->state = ROSE_STATE_4;
rose_start_t2timer(sk);
rose_stop_idletimer(sk);
} else {
rose_frames_acked(sk, nr);
if (frametype == ROSE_RNR) {
rose->condition |= ROSE_COND_PEER_RX_BUSY;
} else {
rose->condition &= ~ROSE_COND_PEER_RX_BUSY;
}
}
break;
case ROSE_DATA: /* XXX */
rose->condition &= ~ROSE_COND_PEER_RX_BUSY;
if (!rose_validate_nr(sk, nr)) {
rose_write_internal(sk, ROSE_RESET_REQUEST);
rose->condition = 0x00;
rose->vs = 0;
rose->vr = 0;
rose->va = 0;
rose->vl = 0;
rose->state = ROSE_STATE_4;
rose_start_t2timer(sk);
rose_stop_idletimer(sk);
break;
}
rose_frames_acked(sk, nr);
if (ns == rose->vr) {
rose_start_idletimer(sk);
if (!sk_filter_trim_cap(sk, skb, ROSE_MIN_LEN) &&
__sock_queue_rcv_skb(sk, skb) == 0) {
rose->vr = (rose->vr + 1) % ROSE_MODULUS;
queued = 1;
} else {
/* Should never happen ! */
rose_write_internal(sk, ROSE_RESET_REQUEST);
rose->condition = 0x00;
rose->vs = 0;
rose->vr = 0;
rose->va = 0;
rose->vl = 0;
rose->state = ROSE_STATE_4;
rose_start_t2timer(sk);
rose_stop_idletimer(sk);
break;
}
if (atomic_read(&sk->sk_rmem_alloc) >
(sk->sk_rcvbuf >> 1))
rose->condition |= ROSE_COND_OWN_RX_BUSY;
}
/*
* If the window is full, ack the frame, else start the
* acknowledge hold back timer.
*/
if (((rose->vl + sysctl_rose_window_size) % ROSE_MODULUS) == rose->vr) {
rose->condition &= ~ROSE_COND_ACK_PENDING;
rose_stop_timer(sk);
rose_enquiry_response(sk);
} else {
rose->condition |= ROSE_COND_ACK_PENDING;
rose_start_hbtimer(sk);
}
break;
default:
printk(KERN_WARNING "ROSE: unknown %02X in state 3\n", frametype);
break;
}
return queued;
}
/*
* State machine for state 4, Awaiting Reset Confirmation State.
* The handling of the timer(s) is in file rose_timer.c
* Handling of state 0 and connection release is in af_rose.c.
*/
static int rose_state4_machine(struct sock *sk, struct sk_buff *skb, int frametype)
{
struct rose_sock *rose = rose_sk(sk);
switch (frametype) {
case ROSE_RESET_REQUEST:
rose_write_internal(sk, ROSE_RESET_CONFIRMATION);
fallthrough;
case ROSE_RESET_CONFIRMATION:
rose_stop_timer(sk);
rose_start_idletimer(sk);
rose->condition = 0x00;
rose->va = 0;
rose->vr = 0;
rose->vs = 0;
rose->vl = 0;
rose->state = ROSE_STATE_3;
rose_requeue_frames(sk);
break;
case ROSE_CLEAR_REQUEST:
rose_write_internal(sk, ROSE_CLEAR_CONFIRMATION);
rose_disconnect(sk, 0, skb->data[3], skb->data[4]);
rose_neigh_put(rose->neighbour);
break;
default:
break;
}
return 0;
}
/*
* State machine for state 5, Awaiting Call Acceptance State.
* The handling of the timer(s) is in file rose_timer.c
* Handling of state 0 and connection release is in af_rose.c.
*/
static int rose_state5_machine(struct sock *sk, struct sk_buff *skb, int frametype)
{
if (frametype == ROSE_CLEAR_REQUEST) {
rose_write_internal(sk, ROSE_CLEAR_CONFIRMATION);
rose_disconnect(sk, 0, skb->data[3], skb->data[4]);
rose_neigh_put(rose_sk(sk)->neighbour);
}
return 0;
}
/* Higher level upcall for a LAPB frame */
int rose_process_rx_frame(struct sock *sk, struct sk_buff *skb)
{
struct rose_sock *rose = rose_sk(sk);
int queued = 0, frametype, ns, nr, q, d, m;
if (rose->state == ROSE_STATE_0)
return 0;
frametype = rose_decode(skb, &ns, &nr, &q, &d, &m);
/*
* ROSE_CLEAR_REQUEST carries cause and diagnostic in bytes 3..4.
* Reject a malformed frame that is too short to contain them.
*/
if (frametype == ROSE_CLEAR_REQUEST && skb->len < 5)
return 0;
switch (rose->state) {
case ROSE_STATE_1:
queued = rose_state1_machine(sk, skb, frametype);
break;
case ROSE_STATE_2:
queued = rose_state2_machine(sk, skb, frametype);
break;
case ROSE_STATE_3:
queued = rose_state3_machine(sk, skb, frametype, ns, nr, q, d, m);
break;
case ROSE_STATE_4:
queued = rose_state4_machine(sk, skb, frametype);
break;
case ROSE_STATE_5:
queued = rose_state5_machine(sk, skb, frametype);
break;
}
rose_kick(sk);
return queued;
}

289
net/rose/rose_link.c
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@ -1,289 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/jiffies.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/slab.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <net/rose.h>
static void rose_ftimer_expiry(struct timer_list *);
static void rose_t0timer_expiry(struct timer_list *);
static void rose_transmit_restart_confirmation(struct rose_neigh *neigh);
static void rose_transmit_restart_request(struct rose_neigh *neigh);
void rose_start_ftimer(struct rose_neigh *neigh)
{
timer_delete(&neigh->ftimer);
neigh->ftimer.function = rose_ftimer_expiry;
neigh->ftimer.expires =
jiffies + msecs_to_jiffies(sysctl_rose_link_fail_timeout);
add_timer(&neigh->ftimer);
}
static void rose_start_t0timer(struct rose_neigh *neigh)
{
timer_delete(&neigh->t0timer);
neigh->t0timer.function = rose_t0timer_expiry;
neigh->t0timer.expires =
jiffies + msecs_to_jiffies(sysctl_rose_restart_request_timeout);
add_timer(&neigh->t0timer);
}
void rose_stop_ftimer(struct rose_neigh *neigh)
{
timer_delete(&neigh->ftimer);
}
void rose_stop_t0timer(struct rose_neigh *neigh)
{
timer_delete(&neigh->t0timer);
}
int rose_ftimer_running(struct rose_neigh *neigh)
{
return timer_pending(&neigh->ftimer);
}
static int rose_t0timer_running(struct rose_neigh *neigh)
{
return timer_pending(&neigh->t0timer);
}
static void rose_ftimer_expiry(struct timer_list *t)
{
}
static void rose_t0timer_expiry(struct timer_list *t)
{
struct rose_neigh *neigh = timer_container_of(neigh, t, t0timer);
rose_transmit_restart_request(neigh);
neigh->dce_mode = 0;
rose_start_t0timer(neigh);
}
/*
* Interface to ax25_send_frame. Changes my level 2 callsign depending
* on whether we have a global ROSE callsign or use the default port
* callsign.
*/
static int rose_send_frame(struct sk_buff *skb, struct rose_neigh *neigh)
{
const ax25_address *rose_call;
ax25_cb *ax25s;
if (ax25cmp(&rose_callsign, &null_ax25_address) == 0)
rose_call = (const ax25_address *)neigh->dev->dev_addr;
else
rose_call = &rose_callsign;
ax25s = neigh->ax25;
neigh->ax25 = ax25_send_frame(skb, 260, rose_call, &neigh->callsign, neigh->digipeat, neigh->dev);
if (ax25s)
ax25_cb_put(ax25s);
return neigh->ax25 != NULL;
}
/*
* Interface to ax25_link_up. Changes my level 2 callsign depending
* on whether we have a global ROSE callsign or use the default port
* callsign.
*/
static int rose_link_up(struct rose_neigh *neigh)
{
const ax25_address *rose_call;
ax25_cb *ax25s;
if (ax25cmp(&rose_callsign, &null_ax25_address) == 0)
rose_call = (const ax25_address *)neigh->dev->dev_addr;
else
rose_call = &rose_callsign;
ax25s = neigh->ax25;
neigh->ax25 = ax25_find_cb(rose_call, &neigh->callsign, neigh->digipeat, neigh->dev);
if (ax25s)
ax25_cb_put(ax25s);
return neigh->ax25 != NULL;
}
/*
* This handles all restart and diagnostic frames.
*/
void rose_link_rx_restart(struct sk_buff *skb, struct rose_neigh *neigh, unsigned short frametype)
{
struct sk_buff *skbn;
switch (frametype) {
case ROSE_RESTART_REQUEST:
rose_stop_t0timer(neigh);
neigh->restarted = 1;
neigh->dce_mode = (skb->data[3] == ROSE_DTE_ORIGINATED);
rose_transmit_restart_confirmation(neigh);
break;
case ROSE_RESTART_CONFIRMATION:
rose_stop_t0timer(neigh);
neigh->restarted = 1;
break;
case ROSE_DIAGNOSTIC:
pr_warn("ROSE: received diagnostic #%d - %3ph\n", skb->data[3],
skb->data + 4);
break;
default:
printk(KERN_WARNING "ROSE: received unknown %02X with LCI 000\n", frametype);
break;
}
if (neigh->restarted) {
while ((skbn = skb_dequeue(&neigh->queue)) != NULL)
if (!rose_send_frame(skbn, neigh))
kfree_skb(skbn);
}
}
/*
* This routine is called when a Restart Request is needed
*/
static void rose_transmit_restart_request(struct rose_neigh *neigh)
{
struct sk_buff *skb;
unsigned char *dptr;
int len;
len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN + 3;
if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)
return;
skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN);
dptr = skb_put(skb, ROSE_MIN_LEN + 3);
*dptr++ = AX25_P_ROSE;
*dptr++ = ROSE_GFI;
*dptr++ = 0x00;
*dptr++ = ROSE_RESTART_REQUEST;
*dptr++ = ROSE_DTE_ORIGINATED;
*dptr++ = 0;
if (!rose_send_frame(skb, neigh))
kfree_skb(skb);
}
/*
* This routine is called when a Restart Confirmation is needed
*/
static void rose_transmit_restart_confirmation(struct rose_neigh *neigh)
{
struct sk_buff *skb;
unsigned char *dptr;
int len;
len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN + 1;
if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)
return;
skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN);
dptr = skb_put(skb, ROSE_MIN_LEN + 1);
*dptr++ = AX25_P_ROSE;
*dptr++ = ROSE_GFI;
*dptr++ = 0x00;
*dptr++ = ROSE_RESTART_CONFIRMATION;
if (!rose_send_frame(skb, neigh))
kfree_skb(skb);
}
/*
* This routine is called when a Clear Request is needed outside of the context
* of a connected socket.
*/
void rose_transmit_clear_request(struct rose_neigh *neigh, unsigned int lci, unsigned char cause, unsigned char diagnostic)
{
struct sk_buff *skb;
unsigned char *dptr;
int len;
if (!neigh->dev)
return;
len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN + 3;
if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)
return;
skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN);
dptr = skb_put(skb, ROSE_MIN_LEN + 3);
*dptr++ = AX25_P_ROSE;
*dptr++ = ((lci >> 8) & 0x0F) | ROSE_GFI;
*dptr++ = ((lci >> 0) & 0xFF);
*dptr++ = ROSE_CLEAR_REQUEST;
*dptr++ = cause;
*dptr++ = diagnostic;
if (!rose_send_frame(skb, neigh))
kfree_skb(skb);
}
void rose_transmit_link(struct sk_buff *skb, struct rose_neigh *neigh)
{
unsigned char *dptr;
if (neigh->loopback) {
rose_loopback_queue(skb, neigh);
return;
}
if (!rose_link_up(neigh))
neigh->restarted = 0;
dptr = skb_push(skb, 1);
*dptr++ = AX25_P_ROSE;
if (neigh->restarted) {
if (!rose_send_frame(skb, neigh))
kfree_skb(skb);
} else {
skb_queue_tail(&neigh->queue, skb);
if (!rose_t0timer_running(neigh)) {
rose_transmit_restart_request(neigh);
neigh->dce_mode = 0;
rose_start_t0timer(neigh);
}
}
}

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net/rose/rose_loopback.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
*/
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/socket.h>
#include <linux/timer.h>
#include <net/ax25.h>
#include <linux/skbuff.h>
#include <net/rose.h>
#include <linux/init.h>
static struct sk_buff_head loopback_queue;
#define ROSE_LOOPBACK_LIMIT 1000
static struct timer_list loopback_timer;
static void rose_set_loopback_timer(void);
static void rose_loopback_timer(struct timer_list *unused);
void rose_loopback_init(void)
{
skb_queue_head_init(&loopback_queue);
timer_setup(&loopback_timer, rose_loopback_timer, 0);
}
static int rose_loopback_running(void)
{
return timer_pending(&loopback_timer);
}
int rose_loopback_queue(struct sk_buff *skb, struct rose_neigh *neigh)
{
struct sk_buff *skbn = NULL;
if (skb_queue_len(&loopback_queue) < ROSE_LOOPBACK_LIMIT)
skbn = skb_clone(skb, GFP_ATOMIC);
if (skbn) {
consume_skb(skb);
skb_queue_tail(&loopback_queue, skbn);
if (!rose_loopback_running())
rose_set_loopback_timer();
} else {
kfree_skb(skb);
}
return 1;
}
static void rose_set_loopback_timer(void)
{
mod_timer(&loopback_timer, jiffies + 10);
}
static void rose_loopback_timer(struct timer_list *unused)
{
struct sk_buff *skb;
struct net_device *dev;
rose_address *dest;
struct sock *sk;
unsigned short frametype;
unsigned int lci_i, lci_o;
int count;
for (count = 0; count < ROSE_LOOPBACK_LIMIT; count++) {
skb = skb_dequeue(&loopback_queue);
if (!skb)
return;
if (skb->len < ROSE_MIN_LEN) {
kfree_skb(skb);
continue;
}
lci_i = ((skb->data[0] << 8) & 0xF00) + ((skb->data[1] << 0) & 0x0FF);
frametype = skb->data[2];
if (frametype == ROSE_CALL_REQUEST &&
(skb->len <= ROSE_CALL_REQ_FACILITIES_OFF ||
skb->data[ROSE_CALL_REQ_ADDR_LEN_OFF] !=
ROSE_CALL_REQ_ADDR_LEN_VAL)) {
kfree_skb(skb);
continue;
}
dest = (rose_address *)(skb->data + ROSE_CALL_REQ_DEST_ADDR_OFF);
lci_o = ROSE_DEFAULT_MAXVC + 1 - lci_i;
skb_reset_transport_header(skb);
sk = rose_find_socket(lci_o, rose_loopback_neigh);
if (sk) {
if (rose_process_rx_frame(sk, skb) == 0)
kfree_skb(skb);
continue;
}
if (frametype == ROSE_CALL_REQUEST) {
if (!rose_loopback_neigh->dev &&
!rose_loopback_neigh->loopback) {
kfree_skb(skb);
continue;
}
dev = rose_dev_get(dest);
if (!dev) {
kfree_skb(skb);
continue;
}
if (rose_rx_call_request(skb, dev, rose_loopback_neigh, lci_o) == 0) {
dev_put(dev);
kfree_skb(skb);
}
} else {
kfree_skb(skb);
}
}
if (!skb_queue_empty(&loopback_queue))
mod_timer(&loopback_timer, jiffies + 1);
}
void __exit rose_loopback_clear(void)
{
struct sk_buff *skb;
timer_delete(&loopback_timer);
while ((skb = skb_dequeue(&loopback_queue)) != NULL) {
skb->sk = NULL;
kfree_skb(skb);
}
}

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net/rose/rose_out.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/gfp.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <net/rose.h>
/*
* This procedure is passed a buffer descriptor for an iframe. It builds
* the rest of the control part of the frame and then writes it out.
*/
static void rose_send_iframe(struct sock *sk, struct sk_buff *skb)
{
struct rose_sock *rose = rose_sk(sk);
if (skb == NULL)
return;
skb->data[2] |= (rose->vr << 5) & 0xE0;
skb->data[2] |= (rose->vs << 1) & 0x0E;
rose_start_idletimer(sk);
rose_transmit_link(skb, rose->neighbour);
}
void rose_kick(struct sock *sk)
{
struct rose_sock *rose = rose_sk(sk);
struct sk_buff *skb, *skbn;
unsigned short start, end;
if (rose->state != ROSE_STATE_3)
return;
if (rose->condition & ROSE_COND_PEER_RX_BUSY)
return;
if (!skb_peek(&sk->sk_write_queue))
return;
start = (skb_peek(&rose->ack_queue) == NULL) ? rose->va : rose->vs;
end = (rose->va + sysctl_rose_window_size) % ROSE_MODULUS;
if (start == end)
return;
rose->vs = start;
/*
* Transmit data until either we're out of data to send or
* the window is full.
*/
skb = skb_dequeue(&sk->sk_write_queue);
do {
if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
skb_queue_head(&sk->sk_write_queue, skb);
break;
}
skb_set_owner_w(skbn, sk);
/*
* Transmit the frame copy.
*/
rose_send_iframe(sk, skbn);
rose->vs = (rose->vs + 1) % ROSE_MODULUS;
/*
* Requeue the original data frame.
*/
skb_queue_tail(&rose->ack_queue, skb);
} while (rose->vs != end &&
(skb = skb_dequeue(&sk->sk_write_queue)) != NULL);
rose->vl = rose->vr;
rose->condition &= ~ROSE_COND_ACK_PENDING;
rose_stop_timer(sk);
}
/*
* The following routines are taken from page 170 of the 7th ARRL Computer
* Networking Conference paper, as is the whole state machine.
*/
void rose_enquiry_response(struct sock *sk)
{
struct rose_sock *rose = rose_sk(sk);
if (rose->condition & ROSE_COND_OWN_RX_BUSY)
rose_write_internal(sk, ROSE_RNR);
else
rose_write_internal(sk, ROSE_RR);
rose->vl = rose->vr;
rose->condition &= ~ROSE_COND_ACK_PENDING;
rose_stop_timer(sk);
}

1333
net/rose/rose_route.c
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net/rose/rose_subr.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/slab.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <net/rose.h>
static int rose_create_facilities(unsigned char *buffer, struct rose_sock *rose);
/*
* This routine purges all of the queues of frames.
*/
void rose_clear_queues(struct sock *sk)
{
skb_queue_purge(&sk->sk_write_queue);
skb_queue_purge(&rose_sk(sk)->ack_queue);
}
/*
* This routine purges the input queue of those frames that have been
* acknowledged. This replaces the boxes labelled "V(a) <- N(r)" on the
* SDL diagram.
*/
void rose_frames_acked(struct sock *sk, unsigned short nr)
{
struct sk_buff *skb;
struct rose_sock *rose = rose_sk(sk);
/*
* Remove all the ack-ed frames from the ack queue.
*/
if (rose->va != nr) {
while (skb_peek(&rose->ack_queue) != NULL && rose->va != nr) {
skb = skb_dequeue(&rose->ack_queue);
kfree_skb(skb);
rose->va = (rose->va + 1) % ROSE_MODULUS;
}
}
}
void rose_requeue_frames(struct sock *sk)
{
struct sk_buff *skb, *skb_prev = NULL;
/*
* Requeue all the un-ack-ed frames on the output queue to be picked
* up by rose_kick. This arrangement handles the possibility of an
* empty output queue.
*/
while ((skb = skb_dequeue(&rose_sk(sk)->ack_queue)) != NULL) {
if (skb_prev == NULL)
skb_queue_head(&sk->sk_write_queue, skb);
else
skb_append(skb_prev, skb, &sk->sk_write_queue);
skb_prev = skb;
}
}
/*
* Validate that the value of nr is between va and vs. Return true or
* false for testing.
*/
int rose_validate_nr(struct sock *sk, unsigned short nr)
{
struct rose_sock *rose = rose_sk(sk);
unsigned short vc = rose->va;
while (vc != rose->vs) {
if (nr == vc) return 1;
vc = (vc + 1) % ROSE_MODULUS;
}
return nr == rose->vs;
}
/*
* This routine is called when the packet layer internally generates a
* control frame.
*/
void rose_write_internal(struct sock *sk, int frametype)
{
struct rose_sock *rose = rose_sk(sk);
struct sk_buff *skb;
unsigned char *dptr;
unsigned char lci1, lci2;
int maxfaclen = 0;
int len, faclen;
int reserve;
reserve = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + 1;
len = ROSE_MIN_LEN;
switch (frametype) {
case ROSE_CALL_REQUEST:
len += 1 + ROSE_ADDR_LEN + ROSE_ADDR_LEN;
maxfaclen = 256;
break;
case ROSE_CALL_ACCEPTED:
case ROSE_CLEAR_REQUEST:
case ROSE_RESET_REQUEST:
len += 2;
break;
}
skb = alloc_skb(reserve + len + maxfaclen, GFP_ATOMIC);
if (!skb)
return;
/*
* Space for AX.25 header and PID.
*/
skb_reserve(skb, reserve);
dptr = skb_put(skb, len);
lci1 = (rose->lci >> 8) & 0x0F;
lci2 = (rose->lci >> 0) & 0xFF;
switch (frametype) {
case ROSE_CALL_REQUEST:
*dptr++ = ROSE_GFI | lci1;
*dptr++ = lci2;
*dptr++ = frametype;
*dptr++ = ROSE_CALL_REQ_ADDR_LEN_VAL;
memcpy(dptr, &rose->dest_addr, ROSE_ADDR_LEN);
dptr += ROSE_ADDR_LEN;
memcpy(dptr, &rose->source_addr, ROSE_ADDR_LEN);
dptr += ROSE_ADDR_LEN;
faclen = rose_create_facilities(dptr, rose);
skb_put(skb, faclen);
dptr += faclen;
break;
case ROSE_CALL_ACCEPTED:
*dptr++ = ROSE_GFI | lci1;
*dptr++ = lci2;
*dptr++ = frametype;
*dptr++ = 0x00; /* Address length */
*dptr++ = 0; /* Facilities length */
break;
case ROSE_CLEAR_REQUEST:
*dptr++ = ROSE_GFI | lci1;
*dptr++ = lci2;
*dptr++ = frametype;
*dptr++ = rose->cause;
*dptr++ = rose->diagnostic;
break;
case ROSE_RESET_REQUEST:
*dptr++ = ROSE_GFI | lci1;
*dptr++ = lci2;
*dptr++ = frametype;
*dptr++ = ROSE_DTE_ORIGINATED;
*dptr++ = 0;
break;
case ROSE_RR:
case ROSE_RNR:
*dptr++ = ROSE_GFI | lci1;
*dptr++ = lci2;
*dptr = frametype;
*dptr++ |= (rose->vr << 5) & 0xE0;
break;
case ROSE_CLEAR_CONFIRMATION:
case ROSE_RESET_CONFIRMATION:
*dptr++ = ROSE_GFI | lci1;
*dptr++ = lci2;
*dptr++ = frametype;
break;
default:
printk(KERN_ERR "ROSE: rose_write_internal - invalid frametype %02X\n", frametype);
kfree_skb(skb);
return;
}
rose_transmit_link(skb, rose->neighbour);
}
int rose_decode(struct sk_buff *skb, int *ns, int *nr, int *q, int *d, int *m)
{
unsigned char *frame;
frame = skb->data;
*ns = *nr = *q = *d = *m = 0;
switch (frame[2]) {
case ROSE_CALL_REQUEST:
case ROSE_CALL_ACCEPTED:
case ROSE_CLEAR_REQUEST:
case ROSE_CLEAR_CONFIRMATION:
case ROSE_RESET_REQUEST:
case ROSE_RESET_CONFIRMATION:
return frame[2];
default:
break;
}
if ((frame[2] & 0x1F) == ROSE_RR ||
(frame[2] & 0x1F) == ROSE_RNR) {
*nr = (frame[2] >> 5) & 0x07;
return frame[2] & 0x1F;
}
if ((frame[2] & 0x01) == ROSE_DATA) {
*q = (frame[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
*d = (frame[0] & ROSE_D_BIT) == ROSE_D_BIT;
*m = (frame[2] & ROSE_M_BIT) == ROSE_M_BIT;
*nr = (frame[2] >> 5) & 0x07;
*ns = (frame[2] >> 1) & 0x07;
return ROSE_DATA;
}
return ROSE_ILLEGAL;
}
static int rose_parse_national(unsigned char *p, struct rose_facilities_struct *facilities, int len)
{
unsigned char *pt;
unsigned char l, lg, n = 0;
int fac_national_digis_received = 0;
do {
switch (*p & 0xC0) {
case 0x00:
if (len < 2)
return -1;
p += 2;
n += 2;
len -= 2;
break;
case 0x40:
if (len < 3)
return -1;
if (*p == FAC_NATIONAL_RAND)
facilities->rand = ((p[1] << 8) & 0xFF00) + ((p[2] << 0) & 0x00FF);
p += 3;
n += 3;
len -= 3;
break;
case 0x80:
if (len < 4)
return -1;
p += 4;
n += 4;
len -= 4;
break;
case 0xC0:
if (len < 2)
return -1;
l = p[1];
if (len < 2 + l)
return -1;
if (*p == FAC_NATIONAL_DEST_DIGI) {
if (!fac_national_digis_received) {
if (l < AX25_ADDR_LEN)
return -1;
memcpy(&facilities->source_digis[0], p + 2, AX25_ADDR_LEN);
facilities->source_ndigis = 1;
}
}
else if (*p == FAC_NATIONAL_SRC_DIGI) {
if (!fac_national_digis_received) {
if (l < AX25_ADDR_LEN)
return -1;
memcpy(&facilities->dest_digis[0], p + 2, AX25_ADDR_LEN);
facilities->dest_ndigis = 1;
}
}
else if (*p == FAC_NATIONAL_FAIL_CALL) {
if (l < AX25_ADDR_LEN)
return -1;
memcpy(&facilities->fail_call, p + 2, AX25_ADDR_LEN);
}
else if (*p == FAC_NATIONAL_FAIL_ADD) {
if (l < 1 + ROSE_ADDR_LEN)
return -1;
memcpy(&facilities->fail_addr, p + 3, ROSE_ADDR_LEN);
}
else if (*p == FAC_NATIONAL_DIGIS) {
if (l % AX25_ADDR_LEN)
return -1;
fac_national_digis_received = 1;
facilities->source_ndigis = 0;
facilities->dest_ndigis = 0;
for (pt = p + 2, lg = 0 ; lg < l ; pt += AX25_ADDR_LEN, lg += AX25_ADDR_LEN) {
if (pt[6] & AX25_HBIT) {
if (facilities->dest_ndigis >= ROSE_MAX_DIGIS)
return -1;
memcpy(&facilities->dest_digis[facilities->dest_ndigis++], pt, AX25_ADDR_LEN);
} else {
if (facilities->source_ndigis >= ROSE_MAX_DIGIS)
return -1;
memcpy(&facilities->source_digis[facilities->source_ndigis++], pt, AX25_ADDR_LEN);
}
}
}
p += l + 2;
n += l + 2;
len -= l + 2;
break;
}
} while (*p != 0x00 && len > 0);
return n;
}
static int rose_parse_ccitt(unsigned char *p, struct rose_facilities_struct *facilities, int len)
{
unsigned char l, n = 0;
char callsign[11];
do {
switch (*p & 0xC0) {
case 0x00:
if (len < 2)
return -1;
p += 2;
n += 2;
len -= 2;
break;
case 0x40:
if (len < 3)
return -1;
p += 3;
n += 3;
len -= 3;
break;
case 0x80:
if (len < 4)
return -1;
p += 4;
n += 4;
len -= 4;
break;
case 0xC0:
if (len < 2)
return -1;
l = p[1];
/* Prevent overflows*/
if (l < 10 || l > 20)
return -1;
if (*p == FAC_CCITT_DEST_NSAP) {
memcpy(&facilities->source_addr, p + 7, ROSE_ADDR_LEN);
memcpy(callsign, p + 12, l - 10);
callsign[l - 10] = '\0';
asc2ax(&facilities->source_call, callsign);
}
if (*p == FAC_CCITT_SRC_NSAP) {
memcpy(&facilities->dest_addr, p + 7, ROSE_ADDR_LEN);
memcpy(callsign, p + 12, l - 10);
callsign[l - 10] = '\0';
asc2ax(&facilities->dest_call, callsign);
}
p += l + 2;
n += l + 2;
len -= l + 2;
break;
}
} while (*p != 0x00 && len > 0);
return n;
}
int rose_parse_facilities(unsigned char *p, unsigned packet_len,
struct rose_facilities_struct *facilities)
{
int facilities_len, len;
facilities_len = *p++;
if (facilities_len == 0 || (unsigned int)facilities_len > packet_len)
return 0;
while (facilities_len >= 3 && *p == 0x00) {
facilities_len--;
p++;
switch (*p) {
case FAC_NATIONAL: /* National */
len = rose_parse_national(p + 1, facilities, facilities_len - 1);
break;
case FAC_CCITT: /* CCITT */
len = rose_parse_ccitt(p + 1, facilities, facilities_len - 1);
break;
default:
printk(KERN_DEBUG "ROSE: rose_parse_facilities - unknown facilities family %02X\n", *p);
len = 1;
break;
}
if (len < 0)
return 0;
if (WARN_ON(len >= facilities_len))
return 0;
facilities_len -= len + 1;
p += len + 1;
}
return facilities_len == 0;
}
static int rose_create_facilities(unsigned char *buffer, struct rose_sock *rose)
{
unsigned char *p = buffer + 1;
char *callsign;
char buf[11];
int len, nb;
/* National Facilities */
if (rose->rand != 0 || rose->source_ndigis == 1 || rose->dest_ndigis == 1) {
*p++ = 0x00;
*p++ = FAC_NATIONAL;
if (rose->rand != 0) {
*p++ = FAC_NATIONAL_RAND;
*p++ = (rose->rand >> 8) & 0xFF;
*p++ = (rose->rand >> 0) & 0xFF;
}
/* Sent before older facilities */
if ((rose->source_ndigis > 0) || (rose->dest_ndigis > 0)) {
int maxdigi = 0;
*p++ = FAC_NATIONAL_DIGIS;
*p++ = AX25_ADDR_LEN * (rose->source_ndigis + rose->dest_ndigis);
for (nb = 0 ; nb < rose->source_ndigis ; nb++) {
if (++maxdigi >= ROSE_MAX_DIGIS)
break;
memcpy(p, &rose->source_digis[nb], AX25_ADDR_LEN);
p[6] |= AX25_HBIT;
p += AX25_ADDR_LEN;
}
for (nb = 0 ; nb < rose->dest_ndigis ; nb++) {
if (++maxdigi >= ROSE_MAX_DIGIS)
break;
memcpy(p, &rose->dest_digis[nb], AX25_ADDR_LEN);
p[6] &= ~AX25_HBIT;
p += AX25_ADDR_LEN;
}
}
/* For compatibility */
if (rose->source_ndigis > 0) {
*p++ = FAC_NATIONAL_SRC_DIGI;
*p++ = AX25_ADDR_LEN;
memcpy(p, &rose->source_digis[0], AX25_ADDR_LEN);
p += AX25_ADDR_LEN;
}
/* For compatibility */
if (rose->dest_ndigis > 0) {
*p++ = FAC_NATIONAL_DEST_DIGI;
*p++ = AX25_ADDR_LEN;
memcpy(p, &rose->dest_digis[0], AX25_ADDR_LEN);
p += AX25_ADDR_LEN;
}
}
*p++ = 0x00;
*p++ = FAC_CCITT;
*p++ = FAC_CCITT_DEST_NSAP;
callsign = ax2asc(buf, &rose->dest_call);
*p++ = strlen(callsign) + 10;
*p++ = (strlen(callsign) + 9) * 2; /* ??? */
*p++ = 0x47; *p++ = 0x00; *p++ = 0x11;
*p++ = ROSE_ADDR_LEN * 2;
memcpy(p, &rose->dest_addr, ROSE_ADDR_LEN);
p += ROSE_ADDR_LEN;
memcpy(p, callsign, strlen(callsign));
p += strlen(callsign);
*p++ = FAC_CCITT_SRC_NSAP;
callsign = ax2asc(buf, &rose->source_call);
*p++ = strlen(callsign) + 10;
*p++ = (strlen(callsign) + 9) * 2; /* ??? */
*p++ = 0x47; *p++ = 0x00; *p++ = 0x11;
*p++ = ROSE_ADDR_LEN * 2;
memcpy(p, &rose->source_addr, ROSE_ADDR_LEN);
p += ROSE_ADDR_LEN;
memcpy(p, callsign, strlen(callsign));
p += strlen(callsign);
len = p - buffer;
buffer[0] = len - 1;
return len;
}
void rose_disconnect(struct sock *sk, int reason, int cause, int diagnostic)
{
struct rose_sock *rose = rose_sk(sk);
rose_stop_timer(sk);
rose_stop_idletimer(sk);
rose_clear_queues(sk);
rose->lci = 0;
rose->state = ROSE_STATE_0;
if (cause != -1)
rose->cause = cause;
if (diagnostic != -1)
rose->diagnostic = diagnostic;
sk->sk_state = TCP_CLOSE;
sk->sk_err = reason;
sk->sk_shutdown |= SEND_SHUTDOWN;
if (!sock_flag(sk, SOCK_DEAD)) {
sk->sk_state_change(sk);
sock_set_flag(sk, SOCK_DEAD);
}
}

227
net/rose/rose_timer.c
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@ -1,227 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
* Copyright (C) 2002 Ralf Baechle DO1GRB (ralf@gnu.org)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/jiffies.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <net/rose.h>
static void rose_heartbeat_expiry(struct timer_list *t);
static void rose_timer_expiry(struct timer_list *);
static void rose_idletimer_expiry(struct timer_list *);
void rose_start_heartbeat(struct sock *sk)
{
sk_stop_timer(sk, &sk->sk_timer);
sk->sk_timer.function = rose_heartbeat_expiry;
sk->sk_timer.expires = jiffies + 5 * HZ;
sk_reset_timer(sk, &sk->sk_timer, sk->sk_timer.expires);
}
void rose_start_t1timer(struct sock *sk)
{
struct rose_sock *rose = rose_sk(sk);
sk_stop_timer(sk, &rose->timer);
rose->timer.function = rose_timer_expiry;
rose->timer.expires = jiffies + rose->t1;
sk_reset_timer(sk, &rose->timer, rose->timer.expires);
}
void rose_start_t2timer(struct sock *sk)
{
struct rose_sock *rose = rose_sk(sk);
sk_stop_timer(sk, &rose->timer);
rose->timer.function = rose_timer_expiry;
rose->timer.expires = jiffies + rose->t2;
sk_reset_timer(sk, &rose->timer, rose->timer.expires);
}
void rose_start_t3timer(struct sock *sk)
{
struct rose_sock *rose = rose_sk(sk);
sk_stop_timer(sk, &rose->timer);
rose->timer.function = rose_timer_expiry;
rose->timer.expires = jiffies + rose->t3;
sk_reset_timer(sk, &rose->timer, rose->timer.expires);
}
void rose_start_hbtimer(struct sock *sk)
{
struct rose_sock *rose = rose_sk(sk);
sk_stop_timer(sk, &rose->timer);
rose->timer.function = rose_timer_expiry;
rose->timer.expires = jiffies + rose->hb;
sk_reset_timer(sk, &rose->timer, rose->timer.expires);
}
void rose_start_idletimer(struct sock *sk)
{
struct rose_sock *rose = rose_sk(sk);
sk_stop_timer(sk, &rose->idletimer);
if (rose->idle > 0) {
rose->idletimer.function = rose_idletimer_expiry;
rose->idletimer.expires = jiffies + rose->idle;
sk_reset_timer(sk, &rose->idletimer, rose->idletimer.expires);
}
}
void rose_stop_heartbeat(struct sock *sk)
{
sk_stop_timer(sk, &sk->sk_timer);
}
void rose_stop_timer(struct sock *sk)
{
sk_stop_timer(sk, &rose_sk(sk)->timer);
}
void rose_stop_idletimer(struct sock *sk)
{
sk_stop_timer(sk, &rose_sk(sk)->idletimer);
}
static void rose_heartbeat_expiry(struct timer_list *t)
{
struct sock *sk = timer_container_of(sk, t, sk_timer);
struct rose_sock *rose = rose_sk(sk);
bh_lock_sock(sk);
if (sock_owned_by_user(sk)) {
sk_reset_timer(sk, &sk->sk_timer, jiffies + HZ/20);
goto out;
}
switch (rose->state) {
case ROSE_STATE_0:
/* Magic here: If we listen() and a new link dies before it
is accepted() it isn't 'dead' so doesn't get removed. */
if (sock_flag(sk, SOCK_DESTROY) ||
(sk->sk_state == TCP_LISTEN && sock_flag(sk, SOCK_DEAD))) {
bh_unlock_sock(sk);
rose_destroy_socket(sk);
sock_put(sk);
return;
}
break;
case ROSE_STATE_3:
/*
* Check for the state of the receive buffer.
*/
if (atomic_read(&sk->sk_rmem_alloc) < (sk->sk_rcvbuf / 2) &&
(rose->condition & ROSE_COND_OWN_RX_BUSY)) {
rose->condition &= ~ROSE_COND_OWN_RX_BUSY;
rose->condition &= ~ROSE_COND_ACK_PENDING;
rose->vl = rose->vr;
rose_write_internal(sk, ROSE_RR);
rose_stop_timer(sk); /* HB */
break;
}
break;
}
rose_start_heartbeat(sk);
out:
bh_unlock_sock(sk);
sock_put(sk);
}
static void rose_timer_expiry(struct timer_list *t)
{
struct rose_sock *rose = timer_container_of(rose, t, timer);
struct sock *sk = &rose->sock;
bh_lock_sock(sk);
if (sock_owned_by_user(sk)) {
sk_reset_timer(sk, &rose->timer, jiffies + HZ/20);
goto out;
}
switch (rose->state) {
case ROSE_STATE_1: /* T1 */
case ROSE_STATE_4: /* T2 */
rose_write_internal(sk, ROSE_CLEAR_REQUEST);
rose->state = ROSE_STATE_2;
rose_start_t3timer(sk);
break;
case ROSE_STATE_2: /* T3 */
rose_neigh_put(rose->neighbour);
rose_disconnect(sk, ETIMEDOUT, -1, -1);
break;
case ROSE_STATE_3: /* HB */
if (rose->condition & ROSE_COND_ACK_PENDING) {
rose->condition &= ~ROSE_COND_ACK_PENDING;
rose_enquiry_response(sk);
}
break;
}
out:
bh_unlock_sock(sk);
sock_put(sk);
}
static void rose_idletimer_expiry(struct timer_list *t)
{
struct rose_sock *rose = timer_container_of(rose, t, idletimer);
struct sock *sk = &rose->sock;
bh_lock_sock(sk);
if (sock_owned_by_user(sk)) {
sk_reset_timer(sk, &rose->idletimer, jiffies + HZ/20);
goto out;
}
rose_clear_queues(sk);
rose_write_internal(sk, ROSE_CLEAR_REQUEST);
rose_sk(sk)->state = ROSE_STATE_2;
rose_start_t3timer(sk);
sk->sk_state = TCP_CLOSE;
sk->sk_err = 0;
sk->sk_shutdown |= SEND_SHUTDOWN;
if (!sock_flag(sk, SOCK_DEAD)) {
sk->sk_state_change(sk);
sock_set_flag(sk, SOCK_DEAD);
}
out:
bh_unlock_sock(sk);
sock_put(sk);
}

125
net/rose/sysctl_net_rose.c
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@ -1,125 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) 1996 Mike Shaver (shaver@zeroknowledge.com)
*/
#include <linux/mm.h>
#include <linux/sysctl.h>
#include <linux/init.h>
#include <net/ax25.h>
#include <net/rose.h>
static int min_timer[] = {1 * HZ};
static int max_timer[] = {300 * HZ};
static int min_idle[] = {0 * HZ};
static int max_idle[] = {65535 * HZ};
static int min_route[1], max_route[] = {1};
static int min_ftimer[] = {60 * HZ};
static int max_ftimer[] = {600 * HZ};
static int min_maxvcs[] = {1}, max_maxvcs[] = {254};
static int min_window[] = {1}, max_window[] = {7};
static struct ctl_table_header *rose_table_header;
static struct ctl_table rose_table[] = {
{
.procname = "restart_request_timeout",
.data = &sysctl_rose_restart_request_timeout,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_timer,
.extra2 = &max_timer
},
{
.procname = "call_request_timeout",
.data = &sysctl_rose_call_request_timeout,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_timer,
.extra2 = &max_timer
},
{
.procname = "reset_request_timeout",
.data = &sysctl_rose_reset_request_timeout,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_timer,
.extra2 = &max_timer
},
{
.procname = "clear_request_timeout",
.data = &sysctl_rose_clear_request_timeout,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_timer,
.extra2 = &max_timer
},
{
.procname = "no_activity_timeout",
.data = &sysctl_rose_no_activity_timeout,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_idle,
.extra2 = &max_idle
},
{
.procname = "acknowledge_hold_back_timeout",
.data = &sysctl_rose_ack_hold_back_timeout,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_timer,
.extra2 = &max_timer
},
{
.procname = "routing_control",
.data = &sysctl_rose_routing_control,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_route,
.extra2 = &max_route
},
{
.procname = "link_fail_timeout",
.data = &sysctl_rose_link_fail_timeout,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_ftimer,
.extra2 = &max_ftimer
},
{
.procname = "maximum_virtual_circuits",
.data = &sysctl_rose_maximum_vcs,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_maxvcs,
.extra2 = &max_maxvcs
},
{
.procname = "window_size",
.data = &sysctl_rose_window_size,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_window,
.extra2 = &max_window
},
};
void __init rose_register_sysctl(void)
{
rose_table_header = register_net_sysctl(&init_net, "net/rose", rose_table);
}
void rose_unregister_sysctl(void)
{
unregister_net_sysctl_table(rose_table_header);
}