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 } 228