blob: 7a6b50a14554d5cbc1390c11288c0dce4c8f7cca [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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/config.h>
16#include <linux/errno.h>
17#include <linux/types.h>
18#include <linux/socket.h>
19#include <linux/in.h>
20#include <linux/kernel.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
37static void ax25_heartbeat_expiry(unsigned long);
38static void ax25_t1timer_expiry(unsigned long);
39static void ax25_t2timer_expiry(unsigned long);
40static void ax25_t3timer_expiry(unsigned long);
41static void ax25_idletimer_expiry(unsigned long);
42
43void ax25_start_heartbeat(ax25_cb *ax25)
44{
45 del_timer(&ax25->timer);
46
47 ax25->timer.data = (unsigned long)ax25;
48 ax25->timer.function = &ax25_heartbeat_expiry;
49 ax25->timer.expires = jiffies + 5 * HZ;
50
51 add_timer(&ax25->timer);
52}
53
54void ax25_start_t1timer(ax25_cb *ax25)
55{
56 del_timer(&ax25->t1timer);
57
58 ax25->t1timer.data = (unsigned long)ax25;
59 ax25->t1timer.function = &ax25_t1timer_expiry;
60 ax25->t1timer.expires = jiffies + ax25->t1;
61
62 add_timer(&ax25->t1timer);
63}
64
65void ax25_start_t2timer(ax25_cb *ax25)
66{
67 del_timer(&ax25->t2timer);
68
69 ax25->t2timer.data = (unsigned long)ax25;
70 ax25->t2timer.function = &ax25_t2timer_expiry;
71 ax25->t2timer.expires = jiffies + ax25->t2;
72
73 add_timer(&ax25->t2timer);
74}
75
76void ax25_start_t3timer(ax25_cb *ax25)
77{
78 del_timer(&ax25->t3timer);
79
80 if (ax25->t3 > 0) {
81 ax25->t3timer.data = (unsigned long)ax25;
82 ax25->t3timer.function = &ax25_t3timer_expiry;
83 ax25->t3timer.expires = jiffies + ax25->t3;
84
85 add_timer(&ax25->t3timer);
86 }
87}
88
89void ax25_start_idletimer(ax25_cb *ax25)
90{
91 del_timer(&ax25->idletimer);
92
93 if (ax25->idle > 0) {
94 ax25->idletimer.data = (unsigned long)ax25;
95 ax25->idletimer.function = &ax25_idletimer_expiry;
96 ax25->idletimer.expires = jiffies + ax25->idle;
97
98 add_timer(&ax25->idletimer);
99 }
100}
101
102void ax25_stop_heartbeat(ax25_cb *ax25)
103{
104 del_timer(&ax25->timer);
105}
106
107void ax25_stop_t1timer(ax25_cb *ax25)
108{
109 del_timer(&ax25->t1timer);
110}
111
112void ax25_stop_t2timer(ax25_cb *ax25)
113{
114 del_timer(&ax25->t2timer);
115}
116
117void ax25_stop_t3timer(ax25_cb *ax25)
118{
119 del_timer(&ax25->t3timer);
120}
121
122void ax25_stop_idletimer(ax25_cb *ax25)
123{
124 del_timer(&ax25->idletimer);
125}
126
127int ax25_t1timer_running(ax25_cb *ax25)
128{
129 return timer_pending(&ax25->t1timer);
130}
131
132unsigned long ax25_display_timer(struct timer_list *timer)
133{
134 if (!timer_pending(timer))
135 return 0;
136
137 return timer->expires - jiffies;
138}
139
140static void ax25_heartbeat_expiry(unsigned long param)
141{
142 int proto = AX25_PROTO_STD_SIMPLEX;
143 ax25_cb *ax25 = (ax25_cb *)param;
144
145 if (ax25->ax25_dev)
146 proto = ax25->ax25_dev->values[AX25_VALUES_PROTOCOL];
147
148 switch (proto) {
149 case AX25_PROTO_STD_SIMPLEX:
150 case AX25_PROTO_STD_DUPLEX:
151 ax25_std_heartbeat_expiry(ax25);
152 break;
153
154#ifdef CONFIG_AX25_DAMA_SLAVE
155 case AX25_PROTO_DAMA_SLAVE:
156 if (ax25->ax25_dev->dama.slave)
157 ax25_ds_heartbeat_expiry(ax25);
158 else
159 ax25_std_heartbeat_expiry(ax25);
160 break;
161#endif
162 }
163}
164
165static void ax25_t1timer_expiry(unsigned long param)
166{
167 ax25_cb *ax25 = (ax25_cb *)param;
168
169 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
170 case AX25_PROTO_STD_SIMPLEX:
171 case AX25_PROTO_STD_DUPLEX:
172 ax25_std_t1timer_expiry(ax25);
173 break;
174
175#ifdef CONFIG_AX25_DAMA_SLAVE
176 case AX25_PROTO_DAMA_SLAVE:
177 if (!ax25->ax25_dev->dama.slave)
178 ax25_std_t1timer_expiry(ax25);
179 break;
180#endif
181 }
182}
183
184static void ax25_t2timer_expiry(unsigned long param)
185{
186 ax25_cb *ax25 = (ax25_cb *)param;
187
188 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
189 case AX25_PROTO_STD_SIMPLEX:
190 case AX25_PROTO_STD_DUPLEX:
191 ax25_std_t2timer_expiry(ax25);
192 break;
193
194#ifdef CONFIG_AX25_DAMA_SLAVE
195 case AX25_PROTO_DAMA_SLAVE:
196 if (!ax25->ax25_dev->dama.slave)
197 ax25_std_t2timer_expiry(ax25);
198 break;
199#endif
200 }
201}
202
203static void ax25_t3timer_expiry(unsigned long param)
204{
205 ax25_cb *ax25 = (ax25_cb *)param;
206
207 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
208 case AX25_PROTO_STD_SIMPLEX:
209 case AX25_PROTO_STD_DUPLEX:
210 ax25_std_t3timer_expiry(ax25);
211 break;
212
213#ifdef CONFIG_AX25_DAMA_SLAVE
214 case AX25_PROTO_DAMA_SLAVE:
215 if (ax25->ax25_dev->dama.slave)
216 ax25_ds_t3timer_expiry(ax25);
217 else
218 ax25_std_t3timer_expiry(ax25);
219 break;
220#endif
221 }
222}
223
224static void ax25_idletimer_expiry(unsigned long param)
225{
226 ax25_cb *ax25 = (ax25_cb *)param;
227
228 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
229 case AX25_PROTO_STD_SIMPLEX:
230 case AX25_PROTO_STD_DUPLEX:
231 ax25_std_idletimer_expiry(ax25);
232 break;
233
234#ifdef CONFIG_AX25_DAMA_SLAVE
235 case AX25_PROTO_DAMA_SLAVE:
236 if (ax25->ax25_dev->dama.slave)
237 ax25_ds_idletimer_expiry(ax25);
238 else
239 ax25_std_idletimer_expiry(ax25);
240 break;
241#endif
242 }
243}