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
ax25_setup_timers(ax25_cb * ax25)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
ax25_start_heartbeat(ax25_cb * ax25)52 void ax25_start_heartbeat(ax25_cb *ax25)
53 {
54 mod_timer(&ax25->timer, jiffies + 5 * HZ);
55 }
56
ax25_start_t1timer(ax25_cb * ax25)57 void ax25_start_t1timer(ax25_cb *ax25)
58 {
59 mod_timer(&ax25->t1timer, jiffies + ax25->t1);
60 }
61
ax25_start_t2timer(ax25_cb * ax25)62 void ax25_start_t2timer(ax25_cb *ax25)
63 {
64 mod_timer(&ax25->t2timer, jiffies + ax25->t2);
65 }
66
ax25_start_t3timer(ax25_cb * ax25)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
ax25_start_idletimer(ax25_cb * ax25)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
ax25_stop_heartbeat(ax25_cb * ax25)83 void ax25_stop_heartbeat(ax25_cb *ax25)
84 {
85 del_timer(&ax25->timer);
86 }
87
ax25_stop_t1timer(ax25_cb * ax25)88 void ax25_stop_t1timer(ax25_cb *ax25)
89 {
90 del_timer(&ax25->t1timer);
91 }
92
ax25_stop_t2timer(ax25_cb * ax25)93 void ax25_stop_t2timer(ax25_cb *ax25)
94 {
95 del_timer(&ax25->t2timer);
96 }
97
ax25_stop_t3timer(ax25_cb * ax25)98 void ax25_stop_t3timer(ax25_cb *ax25)
99 {
100 del_timer(&ax25->t3timer);
101 }
102
ax25_stop_idletimer(ax25_cb * ax25)103 void ax25_stop_idletimer(ax25_cb *ax25)
104 {
105 del_timer(&ax25->idletimer);
106 }
107
ax25_t1timer_running(ax25_cb * ax25)108 int ax25_t1timer_running(ax25_cb *ax25)
109 {
110 return timer_pending(&ax25->t1timer);
111 }
112
ax25_display_timer(struct timer_list * timer)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
ax25_heartbeat_expiry(unsigned long param)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
ax25_t1timer_expiry(unsigned long param)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
ax25_t2timer_expiry(unsigned long param)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
ax25_t3timer_expiry(unsigned long param)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
ax25_idletimer_expiry(unsigned long param)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 }
227