original development tree for Linux kernel GTP module; now long in mainline.
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linux-gtp/net/ax25/ax25_timer.c

228 lines
5.1 KiB

/*
* 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) 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 <asm/uaccess.h>
#include <asm/system.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
static void ax25_heartbeat_expiry(unsigned long);
static void ax25_t1timer_expiry(unsigned long);
static void ax25_t2timer_expiry(unsigned long);
static void ax25_t3timer_expiry(unsigned long);
static void ax25_idletimer_expiry(unsigned long);
void ax25_setup_timers(ax25_cb *ax25)
{
setup_timer(&ax25->timer, ax25_heartbeat_expiry, (unsigned long)ax25);
setup_timer(&ax25->t1timer, ax25_t1timer_expiry, (unsigned long)ax25);
setup_timer(&ax25->t2timer, ax25_t2timer_expiry, (unsigned long)ax25);
setup_timer(&ax25->t3timer, ax25_t3timer_expiry, (unsigned long)ax25);
setup_timer(&ax25->idletimer, ax25_idletimer_expiry,
(unsigned long)ax25);
}
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
del_timer(&ax25->t3timer);
}
void ax25_start_idletimer(ax25_cb *ax25)
{
if (ax25->idle > 0)
mod_timer(&ax25->idletimer, jiffies + ax25->idle);
else
del_timer(&ax25->idletimer);
}
void ax25_stop_heartbeat(ax25_cb *ax25)
{
del_timer(&ax25->timer);
}
void ax25_stop_t1timer(ax25_cb *ax25)
{
del_timer(&ax25->t1timer);
}
void ax25_stop_t2timer(ax25_cb *ax25)
{
del_timer(&ax25->t2timer);
}
void ax25_stop_t3timer(ax25_cb *ax25)
{
del_timer(&ax25->t3timer);
}
void ax25_stop_idletimer(ax25_cb *ax25)
{
del_timer(&ax25->idletimer);
}
int ax25_t1timer_running(ax25_cb *ax25)
{
return timer_pending(&ax25->t1timer);
}
unsigned long ax25_display_timer(struct timer_list *timer)
{
if (!timer_pending(timer))
return 0;
return timer->expires - jiffies;
}
EXPORT_SYMBOL(ax25_display_timer);
static void ax25_heartbeat_expiry(unsigned long param)
{
int proto = AX25_PROTO_STD_SIMPLEX;
ax25_cb *ax25 = (ax25_cb *)param;
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(unsigned long param)
{
ax25_cb *ax25 = (ax25_cb *)param;
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(unsigned long param)
{
ax25_cb *ax25 = (ax25_cb *)param;
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(unsigned long param)
{
ax25_cb *ax25 = (ax25_cb *)param;
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(unsigned long param)
{
ax25_cb *ax25 = (ax25_cb *)param;
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
}
}