Release 4.11 net/ax25/ax25_ds_timer.c
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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(unsigned long);
/*
* 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)
{
setup_timer(&ax25_dev->dama.slave_timer, ax25_ds_timeout,
(unsigned long)ax25_dev);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 21 | 77.78% | 1 | 50.00% |
Jarek Poplawski | 6 | 22.22% | 1 | 50.00% |
Total | 27 | 100.00% | 2 | 100.00% |
void ax25_ds_del_timer(ax25_dev *ax25_dev)
{
if (ax25_dev)
del_timer(&ax25_dev->dama.slave_timer);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 23 | 100.00% | 1 | 100.00% |
Total | 23 | 100.00% | 1 | 100.00% |
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);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 36 | 73.47% | 1 | 33.33% |
Jarek Poplawski | 10 | 20.41% | 1 | 33.33% |
Ralf Bächle | 3 | 6.12% | 1 | 33.33% |
Total | 49 | 100.00% | 3 | 100.00% |
/*
* DAMA Slave Timeout
* Silently discard all (slave) connections in case our master forgot us...
*/
static void ax25_ds_timeout(unsigned long arg)
{
ax25_dev *ax25_dev = (struct ax25_dev *) arg;
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);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 107 | 85.60% | 3 | 50.00% |
Ralf Bächle | 12 | 9.60% | 2 | 33.33% |
Jeroen Vreeken | 6 | 4.80% | 1 | 16.67% |
Total | 125 | 100.00% | 6 | 100.00% |
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);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 100 | 56.82% | 4 | 33.33% |
Jeroen Vreeken | 52 | 29.55% | 1 | 8.33% |
Arnaldo Carvalho de Melo | 10 | 5.68% | 2 | 16.67% |
James Morris | 4 | 2.27% | 1 | 8.33% |
Basil Gunn | 4 | 2.27% | 1 | 8.33% |
Ralf Bächle | 2 | 1.14% | 1 | 8.33% |
Bernard Pidoux | 2 | 1.14% | 1 | 8.33% |
Eric Dumazet | 2 | 1.14% | 1 | 8.33% |
Total | 176 | 100.00% | 12 | 100.00% |
/* 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);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 32 | 100.00% | 2 | 100.00% |
Total | 32 | 100.00% | 2 | 100.00% |
/* 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);
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 93 | 75.61% | 3 | 37.50% |
Jeroen Vreeken | 13 | 10.57% | 1 | 12.50% |
Arnaldo Carvalho de Melo | 12 | 9.76% | 2 | 25.00% |
James Morris | 4 | 3.25% | 1 | 12.50% |
Andrew Morton | 1 | 0.81% | 1 | 12.50% |
Total | 123 | 100.00% | 8 | 100.00% |
/* 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);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 225 | 94.94% | 2 | 66.67% |
Basil Gunn | 12 | 5.06% | 1 | 33.33% |
Total | 237 | 100.00% | 3 | 100.00% |
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 703 | 80.90% | 5 | 21.74% |
Jeroen Vreeken | 71 | 8.17% | 1 | 4.35% |
Ralf Bächle | 23 | 2.65% | 5 | 21.74% |
Arnaldo Carvalho de Melo | 23 | 2.65% | 3 | 13.04% |
Jarek Poplawski | 16 | 1.84% | 1 | 4.35% |
Basil Gunn | 16 | 1.84% | 1 | 4.35% |
James Morris | 8 | 0.92% | 1 | 4.35% |
Eric Dumazet | 2 | 0.23% | 1 | 4.35% |
David S. Miller | 2 | 0.23% | 1 | 4.35% |
Bernard Pidoux | 2 | 0.23% | 1 | 4.35% |
Linus Torvalds | 1 | 0.12% | 1 | 4.35% |
Rusty Russell | 1 | 0.12% | 1 | 4.35% |
Andrew Morton | 1 | 0.12% | 1 | 4.35% |
Total | 869 | 100.00% | 23 | 100.00% |
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