net/ax25/ax25_timer.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License as published by
   4  * the Free Software Foundation; either version 2 of the License, or
   5  * (at your option) any later version.
   6  *
   7  * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
   8  * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
   9  * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
  10  * Copyright (C) Darryl Miles G7LED (dlm@g7led.demon.co.uk)
  11  * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
  12  * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
  13  * Copyright (C) 2002 Ralf Baechle DO1GRB (ralf@gnu.org)
  14  */
  15 #include <linux/errno.h>
  16 #include <linux/types.h>
  17 #include <linux/socket.h>
  18 #include <linux/in.h>
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/jiffies.h>
  22 #include <linux/timer.h>
  23 #include <linux/string.h>
  24 #include <linux/sockios.h>
  25 #include <linux/net.h>
  26 #include <net/ax25.h>
  27 #include <linux/inet.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/skbuff.h>
  30 #include <net/sock.h>
  31 #include <asm/uaccess.h>
  32 #include <asm/system.h>
  33 #include <linux/fcntl.h>
  34 #include <linux/mm.h>
  35 #include <linux/interrupt.h>
  36
  37 static void ax25_heartbeat_expiry(unsigned long);
  38 static void ax25_t1timer_expiry(unsigned long);
  39 static void ax25_t2timer_expiry(unsigned long);
  40 static void ax25_t3timer_expiry(unsigned long);
  41 static void ax25_idletimer_expiry(unsigned long);
  42
  43 void ax25_setup_timers(ax25_cb *ax25)
  44 {
  45         setup_timer(&ax25->timer, ax25_heartbeat_expiry, (unsigned long)ax25);
  46         setup_timer(&ax25->t1timer, ax25_t1timer_expiry, (unsigned long)ax25);
  47         setup_timer(&ax25->t2timer, ax25_t2timer_expiry, (unsigned long)ax25);
  48         setup_timer(&ax25->t3timer, ax25_t3timer_expiry, (unsigned long)ax25);
  49         setup_timer(&ax25->idletimer, ax25_idletimer_expiry,
  50                     (unsigned long)ax25);
  51 }
  52
  53 void ax25_start_heartbeat(ax25_cb *ax25)
  54 {
  55         mod_timer(&ax25->timer, jiffies + 5 * HZ);
  56 }
  57
  58 void ax25_start_t1timer(ax25_cb *ax25)
  59 {
  60         mod_timer(&ax25->t1timer, jiffies + ax25->t1);
  61 }
  62
  63 void ax25_start_t2timer(ax25_cb *ax25)
  64 {
  65         mod_timer(&ax25->t2timer, jiffies + ax25->t2);
  66 }
  67
  68 void ax25_start_t3timer(ax25_cb *ax25)
  69 {
  70         if (ax25->t3 > 0)
  71                 mod_timer(&ax25->t3timer, jiffies + ax25->t3);
  72         else
  73                 del_timer(&ax25->t3timer);
  74 }
  75
  76 void ax25_start_idletimer(ax25_cb *ax25)
  77 {
  78         if (ax25->idle > 0)
  79                 mod_timer(&ax25->idletimer, jiffies + ax25->idle);
  80         else
  81                 del_timer(&ax25->idletimer);
  82 }
  83
  84 void ax25_stop_heartbeat(ax25_cb *ax25)
  85 {
  86         del_timer(&ax25->timer);
  87 }
  88
  89 void ax25_stop_t1timer(ax25_cb *ax25)
  90 {
  91         del_timer(&ax25->t1timer);
  92 }
  93
  94 void ax25_stop_t2timer(ax25_cb *ax25)
  95 {
  96         del_timer(&ax25->t2timer);
  97 }
  98
  99 void ax25_stop_t3timer(ax25_cb *ax25)
 100 {
 101         del_timer(&ax25->t3timer);
 102 }
 103
 104 void ax25_stop_idletimer(ax25_cb *ax25)
 105 {
 106         del_timer(&ax25->idletimer);
 107 }
 108
 109 int ax25_t1timer_running(ax25_cb *ax25)
 110 {
 111         return timer_pending(&ax25->t1timer);
 112 }
 113
 114 unsigned long ax25_display_timer(struct timer_list *timer)
 115 {
 116         if (!timer_pending(timer))
 117                 return 0;
 118
 119         return timer->expires - jiffies;
 120 }
 121
 122 EXPORT_SYMBOL(ax25_display_timer);
 123
 124 static void ax25_heartbeat_expiry(unsigned long param)
 125 {
 126         int proto = AX25_PROTO_STD_SIMPLEX;
 127         ax25_cb *ax25 = (ax25_cb *)param;
 128
 129         if (ax25->ax25_dev)
 130                 proto = ax25->ax25_dev->values[AX25_VALUES_PROTOCOL];
 131
 132         switch (proto) {
 133         case AX25_PROTO_STD_SIMPLEX:
 134         case AX25_PROTO_STD_DUPLEX:
 135                 ax25_std_heartbeat_expiry(ax25);
 136                 break;
 137
 138 #ifdef CONFIG_AX25_DAMA_SLAVE
 139         case AX25_PROTO_DAMA_SLAVE:
 140                 if (ax25->ax25_dev->dama.slave)
 141                         ax25_ds_heartbeat_expiry(ax25);
 142                 else
 143                         ax25_std_heartbeat_expiry(ax25);
 144                 break;
 145 #endif
 146         }
 147 }
 148
 149 static void ax25_t1timer_expiry(unsigned long param)
 150 {
 151         ax25_cb *ax25 = (ax25_cb *)param;
 152
 153         switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
 154         case AX25_PROTO_STD_SIMPLEX:
 155         case AX25_PROTO_STD_DUPLEX:
 156                 ax25_std_t1timer_expiry(ax25);
 157                 break;
 158
 159 #ifdef CONFIG_AX25_DAMA_SLAVE
 160         case AX25_PROTO_DAMA_SLAVE:
 161                 if (!ax25->ax25_dev->dama.slave)
 162                         ax25_std_t1timer_expiry(ax25);
 163                 break;
 164 #endif
 165         }
 166 }
 167
 168 static void ax25_t2timer_expiry(unsigned long param)
 169 {
 170         ax25_cb *ax25 = (ax25_cb *)param;
 171
 172         switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
 173         case AX25_PROTO_STD_SIMPLEX:
 174         case AX25_PROTO_STD_DUPLEX:
 175                 ax25_std_t2timer_expiry(ax25);
 176                 break;
 177
 178 #ifdef CONFIG_AX25_DAMA_SLAVE
 179         case AX25_PROTO_DAMA_SLAVE:
 180                 if (!ax25->ax25_dev->dama.slave)
 181                         ax25_std_t2timer_expiry(ax25);
 182                 break;
 183 #endif
 184         }
 185 }
 186
 187 static void ax25_t3timer_expiry(unsigned long param)
 188 {
 189         ax25_cb *ax25 = (ax25_cb *)param;
 190
 191         switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
 192         case AX25_PROTO_STD_SIMPLEX:
 193         case AX25_PROTO_STD_DUPLEX:
 194                 ax25_std_t3timer_expiry(ax25);
 195                 break;
 196
 197 #ifdef CONFIG_AX25_DAMA_SLAVE
 198         case AX25_PROTO_DAMA_SLAVE:
 199                 if (ax25->ax25_dev->dama.slave)
 200                         ax25_ds_t3timer_expiry(ax25);
 201                 else
 202                         ax25_std_t3timer_expiry(ax25);
 203                 break;
 204 #endif
 205         }
 206 }
 207
 208 static void ax25_idletimer_expiry(unsigned long param)
 209 {
 210         ax25_cb *ax25 = (ax25_cb *)param;
 211
 212         switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
 213         case AX25_PROTO_STD_SIMPLEX:
 214         case AX25_PROTO_STD_DUPLEX:
 215                 ax25_std_idletimer_expiry(ax25);
 216                 break;
 217
 218 #ifdef CONFIG_AX25_DAMA_SLAVE
 219         case AX25_PROTO_DAMA_SLAVE:
 220                 if (ax25->ax25_dev->dama.slave)
 221                         ax25_ds_idletimer_expiry(ax25);
 222                 else
 223                         ax25_std_idletimer_expiry(ax25);
 224                 break;
 225 #endif
 226         }
 227 }