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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * |
4 | * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk) | |
5 | * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) | |
6 | * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi) | |
7 | * Copyright (C) Darryl Miles G7LED (dlm@g7led.demon.co.uk) | |
8 | * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de) | |
9 | * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr) | |
10 | * Copyright (C) 2002 Ralf Baechle DO1GRB (ralf@gnu.org) | |
11 | */ | |
1da177e4 LT |
12 | #include <linux/errno.h> |
13 | #include <linux/types.h> | |
14 | #include <linux/socket.h> | |
15 | #include <linux/in.h> | |
16 | #include <linux/kernel.h> | |
70868eac | 17 | #include <linux/module.h> |
1da177e4 LT |
18 | #include <linux/jiffies.h> |
19 | #include <linux/timer.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/sockios.h> | |
22 | #include <linux/net.h> | |
23 | #include <net/ax25.h> | |
24 | #include <linux/inet.h> | |
25 | #include <linux/netdevice.h> | |
26 | #include <linux/skbuff.h> | |
27 | #include <net/sock.h> | |
7c0f6ba6 | 28 | #include <linux/uaccess.h> |
1da177e4 LT |
29 | #include <linux/fcntl.h> |
30 | #include <linux/mm.h> | |
31 | #include <linux/interrupt.h> | |
32 | ||
8dbd05ff KC |
33 | static void ax25_heartbeat_expiry(struct timer_list *); |
34 | static void ax25_t1timer_expiry(struct timer_list *); | |
35 | static void ax25_t2timer_expiry(struct timer_list *); | |
36 | static void ax25_t3timer_expiry(struct timer_list *); | |
37 | static void ax25_idletimer_expiry(struct timer_list *); | |
1da177e4 | 38 | |
21fab4a8 | 39 | void ax25_setup_timers(ax25_cb *ax25) |
1da177e4 | 40 | { |
8dbd05ff KC |
41 | timer_setup(&ax25->timer, ax25_heartbeat_expiry, 0); |
42 | timer_setup(&ax25->t1timer, ax25_t1timer_expiry, 0); | |
43 | timer_setup(&ax25->t2timer, ax25_t2timer_expiry, 0); | |
44 | timer_setup(&ax25->t3timer, ax25_t3timer_expiry, 0); | |
45 | timer_setup(&ax25->idletimer, ax25_idletimer_expiry, 0); | |
21fab4a8 | 46 | } |
1da177e4 | 47 | |
21fab4a8 JP |
48 | void ax25_start_heartbeat(ax25_cb *ax25) |
49 | { | |
50 | mod_timer(&ax25->timer, jiffies + 5 * HZ); | |
1da177e4 LT |
51 | } |
52 | ||
53 | void ax25_start_t1timer(ax25_cb *ax25) | |
54 | { | |
21fab4a8 | 55 | mod_timer(&ax25->t1timer, jiffies + ax25->t1); |
1da177e4 LT |
56 | } |
57 | ||
58 | void ax25_start_t2timer(ax25_cb *ax25) | |
59 | { | |
21fab4a8 | 60 | mod_timer(&ax25->t2timer, jiffies + ax25->t2); |
1da177e4 LT |
61 | } |
62 | ||
63 | void ax25_start_t3timer(ax25_cb *ax25) | |
64 | { | |
21fab4a8 JP |
65 | if (ax25->t3 > 0) |
66 | mod_timer(&ax25->t3timer, jiffies + ax25->t3); | |
67 | else | |
68 | del_timer(&ax25->t3timer); | |
1da177e4 LT |
69 | } |
70 | ||
71 | void ax25_start_idletimer(ax25_cb *ax25) | |
72 | { | |
21fab4a8 JP |
73 | if (ax25->idle > 0) |
74 | mod_timer(&ax25->idletimer, jiffies + ax25->idle); | |
75 | else | |
76 | del_timer(&ax25->idletimer); | |
1da177e4 LT |
77 | } |
78 | ||
79 | void ax25_stop_heartbeat(ax25_cb *ax25) | |
80 | { | |
81 | del_timer(&ax25->timer); | |
82 | } | |
83 | ||
84 | void ax25_stop_t1timer(ax25_cb *ax25) | |
85 | { | |
86 | del_timer(&ax25->t1timer); | |
87 | } | |
88 | ||
89 | void ax25_stop_t2timer(ax25_cb *ax25) | |
90 | { | |
91 | del_timer(&ax25->t2timer); | |
92 | } | |
93 | ||
94 | void ax25_stop_t3timer(ax25_cb *ax25) | |
95 | { | |
96 | del_timer(&ax25->t3timer); | |
97 | } | |
98 | ||
99 | void ax25_stop_idletimer(ax25_cb *ax25) | |
100 | { | |
101 | del_timer(&ax25->idletimer); | |
102 | } | |
103 | ||
104 | int ax25_t1timer_running(ax25_cb *ax25) | |
105 | { | |
106 | return timer_pending(&ax25->t1timer); | |
107 | } | |
108 | ||
109 | unsigned long ax25_display_timer(struct timer_list *timer) | |
110 | { | |
df1c9414 FR |
111 | long delta = timer->expires - jiffies; |
112 | ||
1da177e4 LT |
113 | if (!timer_pending(timer)) |
114 | return 0; | |
115 | ||
df1c9414 | 116 | return max(0L, delta); |
1da177e4 LT |
117 | } |
118 | ||
70868eac RB |
119 | EXPORT_SYMBOL(ax25_display_timer); |
120 | ||
8dbd05ff | 121 | static void ax25_heartbeat_expiry(struct timer_list *t) |
1da177e4 LT |
122 | { |
123 | int proto = AX25_PROTO_STD_SIMPLEX; | |
8dbd05ff | 124 | ax25_cb *ax25 = from_timer(ax25, t, timer); |
1da177e4 LT |
125 | |
126 | if (ax25->ax25_dev) | |
127 | proto = ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]; | |
128 | ||
129 | switch (proto) { | |
130 | case AX25_PROTO_STD_SIMPLEX: | |
131 | case AX25_PROTO_STD_DUPLEX: | |
132 | ax25_std_heartbeat_expiry(ax25); | |
133 | break; | |
134 | ||
135 | #ifdef CONFIG_AX25_DAMA_SLAVE | |
136 | case AX25_PROTO_DAMA_SLAVE: | |
137 | if (ax25->ax25_dev->dama.slave) | |
138 | ax25_ds_heartbeat_expiry(ax25); | |
139 | else | |
140 | ax25_std_heartbeat_expiry(ax25); | |
141 | break; | |
142 | #endif | |
143 | } | |
144 | } | |
145 | ||
8dbd05ff | 146 | static void ax25_t1timer_expiry(struct timer_list *t) |
1da177e4 | 147 | { |
8dbd05ff | 148 | ax25_cb *ax25 = from_timer(ax25, t, t1timer); |
1da177e4 LT |
149 | |
150 | switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) { | |
151 | case AX25_PROTO_STD_SIMPLEX: | |
152 | case AX25_PROTO_STD_DUPLEX: | |
153 | ax25_std_t1timer_expiry(ax25); | |
154 | break; | |
155 | ||
156 | #ifdef CONFIG_AX25_DAMA_SLAVE | |
157 | case AX25_PROTO_DAMA_SLAVE: | |
158 | if (!ax25->ax25_dev->dama.slave) | |
159 | ax25_std_t1timer_expiry(ax25); | |
160 | break; | |
161 | #endif | |
162 | } | |
163 | } | |
164 | ||
8dbd05ff | 165 | static void ax25_t2timer_expiry(struct timer_list *t) |
1da177e4 | 166 | { |
8dbd05ff | 167 | ax25_cb *ax25 = from_timer(ax25, t, t2timer); |
1da177e4 LT |
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_t2timer_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_t2timer_expiry(ax25); | |
179 | break; | |
180 | #endif | |
181 | } | |
182 | } | |
183 | ||
8dbd05ff | 184 | static void ax25_t3timer_expiry(struct timer_list *t) |
1da177e4 | 185 | { |
8dbd05ff | 186 | ax25_cb *ax25 = from_timer(ax25, t, t3timer); |
1da177e4 LT |
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_t3timer_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_ds_t3timer_expiry(ax25); | |
198 | else | |
199 | ax25_std_t3timer_expiry(ax25); | |
200 | break; | |
201 | #endif | |
202 | } | |
203 | } | |
204 | ||
8dbd05ff | 205 | static void ax25_idletimer_expiry(struct timer_list *t) |
1da177e4 | 206 | { |
8dbd05ff | 207 | ax25_cb *ax25 = from_timer(ax25, t, idletimer); |
1da177e4 LT |
208 | |
209 | switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) { | |
210 | case AX25_PROTO_STD_SIMPLEX: | |
211 | case AX25_PROTO_STD_DUPLEX: | |
212 | ax25_std_idletimer_expiry(ax25); | |
213 | break; | |
214 | ||
215 | #ifdef CONFIG_AX25_DAMA_SLAVE | |
216 | case AX25_PROTO_DAMA_SLAVE: | |
217 | if (ax25->ax25_dev->dama.slave) | |
218 | ax25_ds_idletimer_expiry(ax25); | |
219 | else | |
220 | ax25_std_idletimer_expiry(ax25); | |
221 | break; | |
222 | #endif | |
223 | } | |
224 | } |