1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
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 | */ |
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> |
17 | #include <linux/module.h> |
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> |
28 | #include <linux/uaccess.h> |
29 | #include <linux/fcntl.h> |
30 | #include <linux/mm.h> |
31 | #include <linux/interrupt.h> |
32 | |
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 *); |
38 | |
39 | void ax25_setup_timers(ax25_cb *ax25) |
40 | { |
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); |
46 | } |
47 | |
48 | void ax25_start_heartbeat(ax25_cb *ax25) |
49 | { |
50 | mod_timer(timer: &ax25->timer, expires: jiffies + 5 * HZ); |
51 | } |
52 | |
53 | void ax25_start_t1timer(ax25_cb *ax25) |
54 | { |
55 | mod_timer(timer: &ax25->t1timer, expires: jiffies + ax25->t1); |
56 | } |
57 | |
58 | void ax25_start_t2timer(ax25_cb *ax25) |
59 | { |
60 | mod_timer(timer: &ax25->t2timer, expires: jiffies + ax25->t2); |
61 | } |
62 | |
63 | void ax25_start_t3timer(ax25_cb *ax25) |
64 | { |
65 | if (ax25->t3 > 0) |
66 | mod_timer(timer: &ax25->t3timer, expires: jiffies + ax25->t3); |
67 | else |
68 | del_timer(timer: &ax25->t3timer); |
69 | } |
70 | |
71 | void ax25_start_idletimer(ax25_cb *ax25) |
72 | { |
73 | if (ax25->idle > 0) |
74 | mod_timer(timer: &ax25->idletimer, expires: jiffies + ax25->idle); |
75 | else |
76 | del_timer(timer: &ax25->idletimer); |
77 | } |
78 | |
79 | void ax25_stop_heartbeat(ax25_cb *ax25) |
80 | { |
81 | del_timer(timer: &ax25->timer); |
82 | } |
83 | |
84 | void ax25_stop_t1timer(ax25_cb *ax25) |
85 | { |
86 | del_timer(timer: &ax25->t1timer); |
87 | } |
88 | |
89 | void ax25_stop_t2timer(ax25_cb *ax25) |
90 | { |
91 | del_timer(timer: &ax25->t2timer); |
92 | } |
93 | |
94 | void ax25_stop_t3timer(ax25_cb *ax25) |
95 | { |
96 | del_timer(timer: &ax25->t3timer); |
97 | } |
98 | |
99 | void ax25_stop_idletimer(ax25_cb *ax25) |
100 | { |
101 | del_timer(timer: &ax25->idletimer); |
102 | } |
103 | |
104 | int ax25_t1timer_running(ax25_cb *ax25) |
105 | { |
106 | return timer_pending(timer: &ax25->t1timer); |
107 | } |
108 | |
109 | unsigned long ax25_display_timer(struct timer_list *timer) |
110 | { |
111 | long delta = timer->expires - jiffies; |
112 | |
113 | if (!timer_pending(timer)) |
114 | return 0; |
115 | |
116 | return max(0L, delta); |
117 | } |
118 | |
119 | EXPORT_SYMBOL(ax25_display_timer); |
120 | |
121 | static void ax25_heartbeat_expiry(struct timer_list *t) |
122 | { |
123 | int proto = AX25_PROTO_STD_SIMPLEX; |
124 | ax25_cb *ax25 = from_timer(ax25, t, timer); |
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 | |
146 | static void ax25_t1timer_expiry(struct timer_list *t) |
147 | { |
148 | ax25_cb *ax25 = from_timer(ax25, t, t1timer); |
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 | |
165 | static void ax25_t2timer_expiry(struct timer_list *t) |
166 | { |
167 | ax25_cb *ax25 = from_timer(ax25, t, t2timer); |
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 | |
184 | static void ax25_t3timer_expiry(struct timer_list *t) |
185 | { |
186 | ax25_cb *ax25 = from_timer(ax25, t, t3timer); |
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 | |
205 | static void ax25_idletimer_expiry(struct timer_list *t) |
206 | { |
207 | ax25_cb *ax25 = from_timer(ax25, t, idletimer); |
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 | } |
225 | |