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/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 <asm/uaccess.h>
32#include <linux/fcntl.h>
33#include <linux/mm.h>
34#include <linux/interrupt.h>
35
36static void ax25_heartbeat_expiry(unsigned long);
37static void ax25_t1timer_expiry(unsigned long);
38static void ax25_t2timer_expiry(unsigned long);
39static void ax25_t3timer_expiry(unsigned long);
40static void ax25_idletimer_expiry(unsigned long);
41
42void ax25_setup_timers(ax25_cb *ax25)
43{
44	setup_timer(&ax25->timer, ax25_heartbeat_expiry, (unsigned long)ax25);
45	setup_timer(&ax25->t1timer, ax25_t1timer_expiry, (unsigned long)ax25);
46	setup_timer(&ax25->t2timer, ax25_t2timer_expiry, (unsigned long)ax25);
47	setup_timer(&ax25->t3timer, ax25_t3timer_expiry, (unsigned long)ax25);
48	setup_timer(&ax25->idletimer, ax25_idletimer_expiry,
49		    (unsigned long)ax25);
50}
51
52void ax25_start_heartbeat(ax25_cb *ax25)
53{
54	mod_timer(&ax25->timer, jiffies + 5 * HZ);
55}
56
57void ax25_start_t1timer(ax25_cb *ax25)
58{
59	mod_timer(&ax25->t1timer, jiffies + ax25->t1);
60}
61
62void ax25_start_t2timer(ax25_cb *ax25)
63{
64	mod_timer(&ax25->t2timer, jiffies + ax25->t2);
65}
66
67void ax25_start_t3timer(ax25_cb *ax25)
68{
69	if (ax25->t3 > 0)
70		mod_timer(&ax25->t3timer, jiffies + ax25->t3);
71	else
72		del_timer(&ax25->t3timer);
73}
74
75void ax25_start_idletimer(ax25_cb *ax25)
76{
77	if (ax25->idle > 0)
78		mod_timer(&ax25->idletimer, jiffies + ax25->idle);
79	else
80		del_timer(&ax25->idletimer);
81}
82
83void ax25_stop_heartbeat(ax25_cb *ax25)
84{
85	del_timer(&ax25->timer);
86}
87
88void ax25_stop_t1timer(ax25_cb *ax25)
89{
90	del_timer(&ax25->t1timer);
91}
92
93void ax25_stop_t2timer(ax25_cb *ax25)
94{
95	del_timer(&ax25->t2timer);
96}
97
98void ax25_stop_t3timer(ax25_cb *ax25)
99{
100	del_timer(&ax25->t3timer);
101}
102
103void ax25_stop_idletimer(ax25_cb *ax25)
104{
105	del_timer(&ax25->idletimer);
106}
107
108int ax25_t1timer_running(ax25_cb *ax25)
109{
110	return timer_pending(&ax25->t1timer);
111}
112
113unsigned long ax25_display_timer(struct timer_list *timer)
114{
115	if (!timer_pending(timer))
116		return 0;
117
118	return timer->expires - jiffies;
119}
120
121EXPORT_SYMBOL(ax25_display_timer);
122
123static void ax25_heartbeat_expiry(unsigned long param)
124{
125	int proto = AX25_PROTO_STD_SIMPLEX;
126	ax25_cb *ax25 = (ax25_cb *)param;
127
128	if (ax25->ax25_dev)
129		proto = ax25->ax25_dev->values[AX25_VALUES_PROTOCOL];
130
131	switch (proto) {
132	case AX25_PROTO_STD_SIMPLEX:
133	case AX25_PROTO_STD_DUPLEX:
134		ax25_std_heartbeat_expiry(ax25);
135		break;
136
137#ifdef CONFIG_AX25_DAMA_SLAVE
138	case AX25_PROTO_DAMA_SLAVE:
139		if (ax25->ax25_dev->dama.slave)
140			ax25_ds_heartbeat_expiry(ax25);
141		else
142			ax25_std_heartbeat_expiry(ax25);
143		break;
144#endif
145	}
146}
147
148static void ax25_t1timer_expiry(unsigned long param)
149{
150	ax25_cb *ax25 = (ax25_cb *)param;
151
152	switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
153	case AX25_PROTO_STD_SIMPLEX:
154	case AX25_PROTO_STD_DUPLEX:
155		ax25_std_t1timer_expiry(ax25);
156		break;
157
158#ifdef CONFIG_AX25_DAMA_SLAVE
159	case AX25_PROTO_DAMA_SLAVE:
160		if (!ax25->ax25_dev->dama.slave)
161			ax25_std_t1timer_expiry(ax25);
162		break;
163#endif
164	}
165}
166
167static void ax25_t2timer_expiry(unsigned long param)
168{
169	ax25_cb *ax25 = (ax25_cb *)param;
170
171	switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
172	case AX25_PROTO_STD_SIMPLEX:
173	case AX25_PROTO_STD_DUPLEX:
174		ax25_std_t2timer_expiry(ax25);
175		break;
176
177#ifdef CONFIG_AX25_DAMA_SLAVE
178	case AX25_PROTO_DAMA_SLAVE:
179		if (!ax25->ax25_dev->dama.slave)
180			ax25_std_t2timer_expiry(ax25);
181		break;
182#endif
183	}
184}
185
186static void ax25_t3timer_expiry(unsigned long param)
187{
188	ax25_cb *ax25 = (ax25_cb *)param;
189
190	switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
191	case AX25_PROTO_STD_SIMPLEX:
192	case AX25_PROTO_STD_DUPLEX:
193		ax25_std_t3timer_expiry(ax25);
194		break;
195
196#ifdef CONFIG_AX25_DAMA_SLAVE
197	case AX25_PROTO_DAMA_SLAVE:
198		if (ax25->ax25_dev->dama.slave)
199			ax25_ds_t3timer_expiry(ax25);
200		else
201			ax25_std_t3timer_expiry(ax25);
202		break;
203#endif
204	}
205}
206
207static void ax25_idletimer_expiry(unsigned long param)
208{
209	ax25_cb *ax25 = (ax25_cb *)param;
210
211	switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
212	case AX25_PROTO_STD_SIMPLEX:
213	case AX25_PROTO_STD_DUPLEX:
214		ax25_std_idletimer_expiry(ax25);
215		break;
216
217#ifdef CONFIG_AX25_DAMA_SLAVE
218	case AX25_PROTO_DAMA_SLAVE:
219		if (ax25->ax25_dev->dama.slave)
220			ax25_ds_idletimer_expiry(ax25);
221		else
222			ax25_std_idletimer_expiry(ax25);
223		break;
224#endif
225	}
226}
227