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 <linux/fcntl.h>
  33 #include <linux/mm.h>
  34 #include <linux/interrupt.h>
  35
  36 static void ax25_heartbeat_expiry(unsigned long);
  37 static void ax25_t1timer_expiry(unsigned long);
  38 static void ax25_t2timer_expiry(unsigned long);
  39 static void ax25_t3timer_expiry(unsigned long);
  40 static void ax25_idletimer_expiry(unsigned long);
  41
  42 void ax25_setup_timers(ax25_cb *ax25)
  43 {
  44         setup_timer(&ax25->timer, ax25_heartbeat_expiry, (unsigned long)ax25);
  45         setup_timer(&ax25->t1timer, ax25_t1timer_expiry, (unsigned long)ax25);
  46         setup_timer(&ax25->t2timer, ax25_t2timer_expiry, (unsigned long)ax25);
  47         setup_timer(&ax25->t3timer, ax25_t3timer_expiry, (unsigned long)ax25);
  48         setup_timer(&ax25->idletimer, ax25_idletimer_expiry,
  49                     (unsigned long)ax25);
  50 }
  51
  52 void ax25_start_heartbeat(ax25_cb *ax25)
  53 {
  54         mod_timer(&ax25->timer, jiffies + 5 * HZ);
  55 }
  56
  57 void ax25_start_t1timer(ax25_cb *ax25)
  58 {
  59         mod_timer(&ax25->t1timer, jiffies + ax25->t1);
  60 }
  61
  62 void ax25_start_t2timer(ax25_cb *ax25)
  63 {
  64         mod_timer(&ax25->t2timer, jiffies + ax25->t2);
  65 }
  66
  67 void ax25_start_t3timer(ax25_cb *ax25)
  68 {
  69         if (ax25->t3 > 0)
  70                 mod_timer(&ax25->t3timer, jiffies + ax25->t3);
  71         else
  72                 del_timer(&ax25->t3timer);
  73 }
  74
  75 void ax25_start_idletimer(ax25_cb *ax25)
  76 {
  77         if (ax25->idle > 0)
  78                 mod_timer(&ax25->idletimer, jiffies + ax25->idle);
  79         else
  80                 del_timer(&ax25->idletimer);
  81 }
  82
  83 void ax25_stop_heartbeat(ax25_cb *ax25)
  84 {
  85         del_timer(&ax25->timer);
  86 }
  87
  88 void ax25_stop_t1timer(ax25_cb *ax25)
  89 {
  90         del_timer(&ax25->t1timer);
  91 }
  92
  93 void ax25_stop_t2timer(ax25_cb *ax25)
  94 {
  95         del_timer(&ax25->t2timer);
  96 }
  97
  98 void ax25_stop_t3timer(ax25_cb *ax25)
  99 {
 100         del_timer(&ax25->t3timer);
 101 }
 102
 103 void ax25_stop_idletimer(ax25_cb *ax25)
 104 {
 105         del_timer(&ax25->idletimer);
 106 }
 107
 108 int ax25_t1timer_running(ax25_cb *ax25)
 109 {
 110         return timer_pending(&ax25->t1timer);
 111 }
 112
 113 unsigned long ax25_display_timer(struct timer_list *timer)
 114 {
 115         if (!timer_pending(timer))
 116                 return 0;
 117
 118         return timer->expires - jiffies;
 119 }
 120
 121 EXPORT_SYMBOL(ax25_display_timer);
 122
 123 static void ax25_heartbeat_expiry(unsigned long param)
 124 {
 125         int proto = AX25_PROTO_STD_SIMPLEX;
 126         ax25_cb *ax25 = (ax25_cb *)param;
 127
 128         if (ax25->ax25_dev)
 129                 proto = ax25->ax25_dev->values[AX25_VALUES_PROTOCOL];
 130
 131         switch (proto) {
 132         case AX25_PROTO_STD_SIMPLEX:
 133         case AX25_PROTO_STD_DUPLEX:
 134                 ax25_std_heartbeat_expiry(ax25);
 135                 break;
 136
 137 #ifdef CONFIG_AX25_DAMA_SLAVE
 138         case AX25_PROTO_DAMA_SLAVE:
 139                 if (ax25->ax25_dev->dama.slave)
 140                         ax25_ds_heartbeat_expiry(ax25);
 141                 else
 142                         ax25_std_heartbeat_expiry(ax25);
 143                 break;
 144 #endif
 145         }
 146 }
 147
 148 static void ax25_t1timer_expiry(unsigned long param)
 149 {
 150         ax25_cb *ax25 = (ax25_cb *)param;
 151
 152         switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
 153         case AX25_PROTO_STD_SIMPLEX:
 154         case AX25_PROTO_STD_DUPLEX:
 155                 ax25_std_t1timer_expiry(ax25);
 156                 break;
 157
 158 #ifdef CONFIG_AX25_DAMA_SLAVE
 159         case AX25_PROTO_DAMA_SLAVE:
 160                 if (!ax25->ax25_dev->dama.slave)
 161                         ax25_std_t1timer_expiry(ax25);
 162                 break;
 163 #endif
 164         }
 165 }
 166
 167 static void ax25_t2timer_expiry(unsigned long param)
 168 {
 169         ax25_cb *ax25 = (ax25_cb *)param;
 170
 171         switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
 172         case AX25_PROTO_STD_SIMPLEX:
 173         case AX25_PROTO_STD_DUPLEX:
 174                 ax25_std_t2timer_expiry(ax25);
 175                 break;
 176
 177 #ifdef CONFIG_AX25_DAMA_SLAVE
 178         case AX25_PROTO_DAMA_SLAVE:
 179                 if (!ax25->ax25_dev->dama.slave)
 180                         ax25_std_t2timer_expiry(ax25);
 181                 break;
 182 #endif
 183         }
 184 }
 185
 186 static void ax25_t3timer_expiry(unsigned long param)
 187 {
 188         ax25_cb *ax25 = (ax25_cb *)param;
 189
 190         switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
 191         case AX25_PROTO_STD_SIMPLEX:
 192         case AX25_PROTO_STD_DUPLEX:
 193                 ax25_std_t3timer_expiry(ax25);
 194                 break;
 195
 196 #ifdef CONFIG_AX25_DAMA_SLAVE
 197         case AX25_PROTO_DAMA_SLAVE:
 198                 if (ax25->ax25_dev->dama.slave)
 199                         ax25_ds_t3timer_expiry(ax25);
 200                 else
 201                         ax25_std_t3timer_expiry(ax25);
 202                 break;
 203 #endif
 204         }
 205 }
 206
 207 static void ax25_idletimer_expiry(unsigned long param)
 208 {
 209         ax25_cb *ax25 = (ax25_cb *)param;
 210
 211         switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
 212         case AX25_PROTO_STD_SIMPLEX:
 213         case AX25_PROTO_STD_DUPLEX:
 214                 ax25_std_idletimer_expiry(ax25);
 215                 break;
 216
 217 #ifdef CONFIG_AX25_DAMA_SLAVE
 218         case AX25_PROTO_DAMA_SLAVE:
 219                 if (ax25->ax25_dev->dama.slave)
 220                         ax25_ds_idletimer_expiry(ax25);
 221                 else
 222                         ax25_std_idletimer_expiry(ax25);
 223                 break;
 224 #endif
 225         }
 226 }