1
2
3
4
5
6
7
8
9
10
11
12
13
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 <linux/uaccess.h>
32#include <linux/fcntl.h>
33#include <linux/mm.h>
34#include <linux/interrupt.h>
35
36static void ax25_heartbeat_expiry(struct timer_list *);
37static void ax25_t1timer_expiry(struct timer_list *);
38static void ax25_t2timer_expiry(struct timer_list *);
39static void ax25_t3timer_expiry(struct timer_list *);
40static void ax25_idletimer_expiry(struct timer_list *);
41
42void ax25_setup_timers(ax25_cb *ax25)
43{
44 timer_setup(&ax25->timer, ax25_heartbeat_expiry, 0);
45 timer_setup(&ax25->t1timer, ax25_t1timer_expiry, 0);
46 timer_setup(&ax25->t2timer, ax25_t2timer_expiry, 0);
47 timer_setup(&ax25->t3timer, ax25_t3timer_expiry, 0);
48 timer_setup(&ax25->idletimer, ax25_idletimer_expiry, 0);
49}
50
51void ax25_start_heartbeat(ax25_cb *ax25)
52{
53 mod_timer(&ax25->timer, jiffies + 5 * HZ);
54}
55
56void ax25_start_t1timer(ax25_cb *ax25)
57{
58 mod_timer(&ax25->t1timer, jiffies + ax25->t1);
59}
60
61void ax25_start_t2timer(ax25_cb *ax25)
62{
63 mod_timer(&ax25->t2timer, jiffies + ax25->t2);
64}
65
66void ax25_start_t3timer(ax25_cb *ax25)
67{
68 if (ax25->t3 > 0)
69 mod_timer(&ax25->t3timer, jiffies + ax25->t3);
70 else
71 del_timer(&ax25->t3timer);
72}
73
74void ax25_start_idletimer(ax25_cb *ax25)
75{
76 if (ax25->idle > 0)
77 mod_timer(&ax25->idletimer, jiffies + ax25->idle);
78 else
79 del_timer(&ax25->idletimer);
80}
81
82void ax25_stop_heartbeat(ax25_cb *ax25)
83{
84 del_timer(&ax25->timer);
85}
86
87void ax25_stop_t1timer(ax25_cb *ax25)
88{
89 del_timer(&ax25->t1timer);
90}
91
92void ax25_stop_t2timer(ax25_cb *ax25)
93{
94 del_timer(&ax25->t2timer);
95}
96
97void ax25_stop_t3timer(ax25_cb *ax25)
98{
99 del_timer(&ax25->t3timer);
100}
101
102void ax25_stop_idletimer(ax25_cb *ax25)
103{
104 del_timer(&ax25->idletimer);
105}
106
107int ax25_t1timer_running(ax25_cb *ax25)
108{
109 return timer_pending(&ax25->t1timer);
110}
111
112unsigned long ax25_display_timer(struct timer_list *timer)
113{
114 if (!timer_pending(timer))
115 return 0;
116
117 return timer->expires - jiffies;
118}
119
120EXPORT_SYMBOL(ax25_display_timer);
121
122static void ax25_heartbeat_expiry(struct timer_list *t)
123{
124 int proto = AX25_PROTO_STD_SIMPLEX;
125 ax25_cb *ax25 = from_timer(ax25, t, timer);
126
127 if (ax25->ax25_dev)
128 proto = ax25->ax25_dev->values[AX25_VALUES_PROTOCOL];
129
130 switch (proto) {
131 case AX25_PROTO_STD_SIMPLEX:
132 case AX25_PROTO_STD_DUPLEX:
133 ax25_std_heartbeat_expiry(ax25);
134 break;
135
136#ifdef CONFIG_AX25_DAMA_SLAVE
137 case AX25_PROTO_DAMA_SLAVE:
138 if (ax25->ax25_dev->dama.slave)
139 ax25_ds_heartbeat_expiry(ax25);
140 else
141 ax25_std_heartbeat_expiry(ax25);
142 break;
143#endif
144 }
145}
146
147static void ax25_t1timer_expiry(struct timer_list *t)
148{
149 ax25_cb *ax25 = from_timer(ax25, t, t1timer);
150
151 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
152 case AX25_PROTO_STD_SIMPLEX:
153 case AX25_PROTO_STD_DUPLEX:
154 ax25_std_t1timer_expiry(ax25);
155 break;
156
157#ifdef CONFIG_AX25_DAMA_SLAVE
158 case AX25_PROTO_DAMA_SLAVE:
159 if (!ax25->ax25_dev->dama.slave)
160 ax25_std_t1timer_expiry(ax25);
161 break;
162#endif
163 }
164}
165
166static void ax25_t2timer_expiry(struct timer_list *t)
167{
168 ax25_cb *ax25 = from_timer(ax25, t, t2timer);
169
170 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
171 case AX25_PROTO_STD_SIMPLEX:
172 case AX25_PROTO_STD_DUPLEX:
173 ax25_std_t2timer_expiry(ax25);
174 break;
175
176#ifdef CONFIG_AX25_DAMA_SLAVE
177 case AX25_PROTO_DAMA_SLAVE:
178 if (!ax25->ax25_dev->dama.slave)
179 ax25_std_t2timer_expiry(ax25);
180 break;
181#endif
182 }
183}
184
185static void ax25_t3timer_expiry(struct timer_list *t)
186{
187 ax25_cb *ax25 = from_timer(ax25, t, t3timer);
188
189 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
190 case AX25_PROTO_STD_SIMPLEX:
191 case AX25_PROTO_STD_DUPLEX:
192 ax25_std_t3timer_expiry(ax25);
193 break;
194
195#ifdef CONFIG_AX25_DAMA_SLAVE
196 case AX25_PROTO_DAMA_SLAVE:
197 if (ax25->ax25_dev->dama.slave)
198 ax25_ds_t3timer_expiry(ax25);
199 else
200 ax25_std_t3timer_expiry(ax25);
201 break;
202#endif
203 }
204}
205
206static void ax25_idletimer_expiry(struct timer_list *t)
207{
208 ax25_cb *ax25 = from_timer(ax25, t, idletimer);
209
210 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
211 case AX25_PROTO_STD_SIMPLEX:
212 case AX25_PROTO_STD_DUPLEX:
213 ax25_std_idletimer_expiry(ax25);
214 break;
215
216#ifdef CONFIG_AX25_DAMA_SLAVE
217 case AX25_PROTO_DAMA_SLAVE:
218 if (ax25->ax25_dev->dama.slave)
219 ax25_ds_idletimer_expiry(ax25);
220 else
221 ax25_std_idletimer_expiry(ax25);
222 break;
223#endif
224 }
225}
226