/*
   * 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
  	}
  }