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1da177e4 LT |
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/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 | ||
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_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 | ||
54 | void 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 | ||
65 | void 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 | ||
76 | void 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 | ||
89 | void 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 | ||
102 | void ax25_stop_heartbeat(ax25_cb *ax25) | |
103 | { | |
104 | del_timer(&ax25->timer); | |
105 | } | |
106 | ||
107 | void ax25_stop_t1timer(ax25_cb *ax25) | |
108 | { | |
109 | del_timer(&ax25->t1timer); | |
110 | } | |
111 | ||
112 | void ax25_stop_t2timer(ax25_cb *ax25) | |
113 | { | |
114 | del_timer(&ax25->t2timer); | |
115 | } | |
116 | ||
117 | void ax25_stop_t3timer(ax25_cb *ax25) | |
118 | { | |
119 | del_timer(&ax25->t3timer); | |
120 | } | |
121 | ||
122 | void ax25_stop_idletimer(ax25_cb *ax25) | |
123 | { | |
124 | del_timer(&ax25->idletimer); | |
125 | } | |
126 | ||
127 | int ax25_t1timer_running(ax25_cb *ax25) | |
128 | { | |
129 | return timer_pending(&ax25->t1timer); | |
130 | } | |
131 | ||
132 | unsigned 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 | ||
140 | static 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 | ||
165 | static 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 | ||
184 | static 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 | ||
203 | static 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 | ||
224 | static 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 | } |