blob: 479cae57d1873a97c2f97a6865c873cb12218e37 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
8 * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
9 */
10#include <linux/errno.h>
11#include <linux/types.h>
12#include <linux/socket.h>
13#include <linux/in.h>
14#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/timer.h>
16#include <linux/string.h>
17#include <linux/sockios.h>
18#include <linux/net.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090019#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <net/ax25.h>
21#include <linux/inet.h>
22#include <linux/netdevice.h>
23#include <net/arp.h>
24#include <linux/if_arp.h>
25#include <linux/skbuff.h>
26#include <net/sock.h>
Arnaldo Carvalho de Meloc752f072005-08-09 20:08:28 -070027#include <net/tcp_states.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <asm/system.h>
29#include <asm/uaccess.h>
30#include <linux/fcntl.h>
31#include <linux/termios.h> /* For TIOCINQ/OUTQ */
32#include <linux/mm.h>
33#include <linux/interrupt.h>
34#include <linux/notifier.h>
35#include <linux/netfilter.h>
36#include <linux/init.h>
37#include <net/rose.h>
38#include <linux/seq_file.h>
39
40static unsigned int rose_neigh_no = 1;
41
42static struct rose_node *rose_node_list;
43static DEFINE_SPINLOCK(rose_node_list_lock);
44static struct rose_neigh *rose_neigh_list;
45static DEFINE_SPINLOCK(rose_neigh_list_lock);
46static struct rose_route *rose_route_list;
47static DEFINE_SPINLOCK(rose_route_list_lock);
48
Alexey Dobriyan891e6a92007-10-07 23:44:17 -070049struct rose_neigh *rose_loopback_neigh;
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Linus Torvalds1da177e2005-04-16 15:20:36 -070051/*
52 * Add a new route to a node, and in the process add the node and the
53 * neighbour if it is new.
54 */
Ralf Baechlec9266b92006-12-14 15:49:28 -080055static int __must_check rose_add_node(struct rose_route_struct *rose_route,
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 struct net_device *dev)
57{
58 struct rose_node *rose_node, *rose_tmpn, *rose_tmpp;
59 struct rose_neigh *rose_neigh;
60 int i, res = 0;
61
62 spin_lock_bh(&rose_node_list_lock);
63 spin_lock_bh(&rose_neigh_list_lock);
64
65 rose_node = rose_node_list;
66 while (rose_node != NULL) {
67 if ((rose_node->mask == rose_route->mask) &&
68 (rosecmpm(&rose_route->address, &rose_node->address,
YOSHIFUJI Hideaki3dcf7c52007-02-09 23:25:12 +090069 rose_route->mask) == 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 break;
71 rose_node = rose_node->next;
72 }
73
74 if (rose_node != NULL && rose_node->loopback) {
75 res = -EINVAL;
76 goto out;
77 }
78
79 rose_neigh = rose_neigh_list;
80 while (rose_neigh != NULL) {
Joe Perchesf64f9e72009-11-29 16:55:45 -080081 if (ax25cmp(&rose_route->neighbour,
82 &rose_neigh->callsign) == 0 &&
83 rose_neigh->dev == dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 break;
85 rose_neigh = rose_neigh->next;
86 }
87
88 if (rose_neigh == NULL) {
89 rose_neigh = kmalloc(sizeof(*rose_neigh), GFP_ATOMIC);
90 if (rose_neigh == NULL) {
91 res = -ENOMEM;
92 goto out;
93 }
94
95 rose_neigh->callsign = rose_route->neighbour;
96 rose_neigh->digipeat = NULL;
97 rose_neigh->ax25 = NULL;
98 rose_neigh->dev = dev;
99 rose_neigh->count = 0;
100 rose_neigh->use = 0;
101 rose_neigh->dce_mode = 0;
102 rose_neigh->loopback = 0;
103 rose_neigh->number = rose_neigh_no++;
104 rose_neigh->restarted = 0;
105
106 skb_queue_head_init(&rose_neigh->queue);
107
108 init_timer(&rose_neigh->ftimer);
109 init_timer(&rose_neigh->t0timer);
110
111 if (rose_route->ndigis != 0) {
Julia Lawalle2e0c7c2010-07-30 23:56:39 +0000112 rose_neigh->digipeat =
113 kmalloc(sizeof(ax25_digi), GFP_ATOMIC);
114 if (rose_neigh->digipeat == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 kfree(rose_neigh);
116 res = -ENOMEM;
117 goto out;
118 }
119
120 rose_neigh->digipeat->ndigi = rose_route->ndigis;
121 rose_neigh->digipeat->lastrepeat = -1;
122
123 for (i = 0; i < rose_route->ndigis; i++) {
124 rose_neigh->digipeat->calls[i] =
125 rose_route->digipeaters[i];
126 rose_neigh->digipeat->repeated[i] = 0;
127 }
128 }
129
130 rose_neigh->next = rose_neigh_list;
131 rose_neigh_list = rose_neigh;
132 }
133
134 /*
135 * This is a new node to be inserted into the list. Find where it needs
136 * to be inserted into the list, and insert it. We want to be sure
137 * to order the list in descending order of mask size to ensure that
138 * later when we are searching this list the first match will be the
139 * best match.
140 */
141 if (rose_node == NULL) {
142 rose_tmpn = rose_node_list;
143 rose_tmpp = NULL;
144
145 while (rose_tmpn != NULL) {
146 if (rose_tmpn->mask > rose_route->mask) {
147 rose_tmpp = rose_tmpn;
148 rose_tmpn = rose_tmpn->next;
149 } else {
150 break;
151 }
152 }
153
154 /* create new node */
155 rose_node = kmalloc(sizeof(*rose_node), GFP_ATOMIC);
156 if (rose_node == NULL) {
157 res = -ENOMEM;
158 goto out;
159 }
160
161 rose_node->address = rose_route->address;
162 rose_node->mask = rose_route->mask;
163 rose_node->count = 1;
164 rose_node->loopback = 0;
165 rose_node->neighbour[0] = rose_neigh;
166
167 if (rose_tmpn == NULL) {
168 if (rose_tmpp == NULL) { /* Empty list */
169 rose_node_list = rose_node;
170 rose_node->next = NULL;
171 } else {
172 rose_tmpp->next = rose_node;
173 rose_node->next = NULL;
174 }
175 } else {
176 if (rose_tmpp == NULL) { /* 1st node */
177 rose_node->next = rose_node_list;
178 rose_node_list = rose_node;
179 } else {
180 rose_tmpp->next = rose_node;
181 rose_node->next = rose_tmpn;
182 }
183 }
184 rose_neigh->count++;
185
186 goto out;
187 }
188
189 /* We have space, slot it in */
190 if (rose_node->count < 3) {
191 rose_node->neighbour[rose_node->count] = rose_neigh;
192 rose_node->count++;
193 rose_neigh->count++;
194 }
195
196out:
197 spin_unlock_bh(&rose_neigh_list_lock);
198 spin_unlock_bh(&rose_node_list_lock);
199
200 return res;
201}
202
203/*
204 * Caller is holding rose_node_list_lock.
205 */
206static void rose_remove_node(struct rose_node *rose_node)
207{
208 struct rose_node *s;
209
210 if ((s = rose_node_list) == rose_node) {
211 rose_node_list = rose_node->next;
212 kfree(rose_node);
213 return;
214 }
215
216 while (s != NULL && s->next != NULL) {
217 if (s->next == rose_node) {
218 s->next = rose_node->next;
219 kfree(rose_node);
220 return;
221 }
222
223 s = s->next;
224 }
225}
226
227/*
228 * Caller is holding rose_neigh_list_lock.
229 */
230static void rose_remove_neigh(struct rose_neigh *rose_neigh)
231{
232 struct rose_neigh *s;
233
234 rose_stop_ftimer(rose_neigh);
235 rose_stop_t0timer(rose_neigh);
236
237 skb_queue_purge(&rose_neigh->queue);
238
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 if ((s = rose_neigh_list) == rose_neigh) {
240 rose_neigh_list = rose_neigh->next;
Jarek Poplawskid00c3622010-01-16 01:04:04 -0800241 if (rose_neigh->ax25)
242 ax25_cb_put(rose_neigh->ax25);
Jesper Juhla51482b2005-11-08 09:41:34 -0800243 kfree(rose_neigh->digipeat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 kfree(rose_neigh);
245 return;
246 }
247
248 while (s != NULL && s->next != NULL) {
249 if (s->next == rose_neigh) {
250 s->next = rose_neigh->next;
Jarek Poplawskid00c3622010-01-16 01:04:04 -0800251 if (rose_neigh->ax25)
252 ax25_cb_put(rose_neigh->ax25);
Jesper Juhla51482b2005-11-08 09:41:34 -0800253 kfree(rose_neigh->digipeat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 kfree(rose_neigh);
255 return;
256 }
257
258 s = s->next;
259 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260}
261
262/*
263 * Caller is holding rose_route_list_lock.
264 */
265static void rose_remove_route(struct rose_route *rose_route)
266{
267 struct rose_route *s;
268
269 if (rose_route->neigh1 != NULL)
270 rose_route->neigh1->use--;
271
272 if (rose_route->neigh2 != NULL)
273 rose_route->neigh2->use--;
274
275 if ((s = rose_route_list) == rose_route) {
276 rose_route_list = rose_route->next;
277 kfree(rose_route);
278 return;
279 }
280
281 while (s != NULL && s->next != NULL) {
282 if (s->next == rose_route) {
283 s->next = rose_route->next;
284 kfree(rose_route);
285 return;
286 }
287
288 s = s->next;
289 }
290}
291
292/*
293 * "Delete" a node. Strictly speaking remove a route to a node. The node
294 * is only deleted if no routes are left to it.
295 */
296static int rose_del_node(struct rose_route_struct *rose_route,
297 struct net_device *dev)
298{
299 struct rose_node *rose_node;
300 struct rose_neigh *rose_neigh;
301 int i, err = 0;
302
303 spin_lock_bh(&rose_node_list_lock);
304 spin_lock_bh(&rose_neigh_list_lock);
305
306 rose_node = rose_node_list;
307 while (rose_node != NULL) {
308 if ((rose_node->mask == rose_route->mask) &&
309 (rosecmpm(&rose_route->address, &rose_node->address,
YOSHIFUJI Hideaki3dcf7c52007-02-09 23:25:12 +0900310 rose_route->mask) == 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 break;
312 rose_node = rose_node->next;
313 }
314
315 if (rose_node == NULL || rose_node->loopback) {
316 err = -EINVAL;
317 goto out;
318 }
319
320 rose_neigh = rose_neigh_list;
321 while (rose_neigh != NULL) {
Joe Perchesf64f9e72009-11-29 16:55:45 -0800322 if (ax25cmp(&rose_route->neighbour,
323 &rose_neigh->callsign) == 0 &&
324 rose_neigh->dev == dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 break;
326 rose_neigh = rose_neigh->next;
327 }
328
329 if (rose_neigh == NULL) {
330 err = -EINVAL;
331 goto out;
332 }
333
334 for (i = 0; i < rose_node->count; i++) {
335 if (rose_node->neighbour[i] == rose_neigh) {
336 rose_neigh->count--;
337
338 if (rose_neigh->count == 0 && rose_neigh->use == 0)
339 rose_remove_neigh(rose_neigh);
340
341 rose_node->count--;
342
343 if (rose_node->count == 0) {
344 rose_remove_node(rose_node);
345 } else {
346 switch (i) {
347 case 0:
348 rose_node->neighbour[0] =
349 rose_node->neighbour[1];
350 case 1:
351 rose_node->neighbour[1] =
352 rose_node->neighbour[2];
353 case 2:
354 break;
355 }
356 }
357 goto out;
358 }
359 }
360 err = -EINVAL;
361
362out:
363 spin_unlock_bh(&rose_neigh_list_lock);
364 spin_unlock_bh(&rose_node_list_lock);
365
366 return err;
367}
368
369/*
370 * Add the loopback neighbour.
371 */
Ralf Baechlea3d38402006-12-14 15:52:13 -0800372void rose_add_loopback_neigh(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373{
Alexey Dobriyan891e6a92007-10-07 23:44:17 -0700374 struct rose_neigh *sn;
375
376 rose_loopback_neigh = kmalloc(sizeof(struct rose_neigh), GFP_KERNEL);
377 if (!rose_loopback_neigh)
378 return;
379 sn = rose_loopback_neigh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
Ralf Baechlea3d38402006-12-14 15:52:13 -0800381 sn->callsign = null_ax25_address;
382 sn->digipeat = NULL;
383 sn->ax25 = NULL;
384 sn->dev = NULL;
385 sn->count = 0;
386 sn->use = 0;
387 sn->dce_mode = 1;
388 sn->loopback = 1;
389 sn->number = rose_neigh_no++;
390 sn->restarted = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
Ralf Baechlea3d38402006-12-14 15:52:13 -0800392 skb_queue_head_init(&sn->queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
Ralf Baechlea3d38402006-12-14 15:52:13 -0800394 init_timer(&sn->ftimer);
395 init_timer(&sn->t0timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
397 spin_lock_bh(&rose_neigh_list_lock);
Ralf Baechlea3d38402006-12-14 15:52:13 -0800398 sn->next = rose_neigh_list;
399 rose_neigh_list = sn;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 spin_unlock_bh(&rose_neigh_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401}
402
403/*
404 * Add a loopback node.
405 */
406int rose_add_loopback_node(rose_address *address)
407{
408 struct rose_node *rose_node;
Alexey Dobriyan0506d402006-12-02 22:17:48 -0800409 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410
411 spin_lock_bh(&rose_node_list_lock);
412
413 rose_node = rose_node_list;
414 while (rose_node != NULL) {
415 if ((rose_node->mask == 10) &&
416 (rosecmpm(address, &rose_node->address, 10) == 0) &&
417 rose_node->loopback)
418 break;
419 rose_node = rose_node->next;
420 }
421
422 if (rose_node != NULL)
423 goto out;
424
425 if ((rose_node = kmalloc(sizeof(*rose_node), GFP_ATOMIC)) == NULL) {
426 err = -ENOMEM;
427 goto out;
428 }
429
430 rose_node->address = *address;
431 rose_node->mask = 10;
432 rose_node->count = 1;
433 rose_node->loopback = 1;
Alexey Dobriyan891e6a92007-10-07 23:44:17 -0700434 rose_node->neighbour[0] = rose_loopback_neigh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435
436 /* Insert at the head of list. Address is always mask=10 */
437 rose_node->next = rose_node_list;
438 rose_node_list = rose_node;
439
Alexey Dobriyan891e6a92007-10-07 23:44:17 -0700440 rose_loopback_neigh->count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
442out:
443 spin_unlock_bh(&rose_node_list_lock);
444
Alexey Dobriyan0506d402006-12-02 22:17:48 -0800445 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446}
447
448/*
449 * Delete a loopback node.
450 */
451void rose_del_loopback_node(rose_address *address)
452{
453 struct rose_node *rose_node;
454
455 spin_lock_bh(&rose_node_list_lock);
456
457 rose_node = rose_node_list;
458 while (rose_node != NULL) {
459 if ((rose_node->mask == 10) &&
460 (rosecmpm(address, &rose_node->address, 10) == 0) &&
461 rose_node->loopback)
462 break;
463 rose_node = rose_node->next;
464 }
465
466 if (rose_node == NULL)
467 goto out;
468
469 rose_remove_node(rose_node);
470
Alexey Dobriyan891e6a92007-10-07 23:44:17 -0700471 rose_loopback_neigh->count--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
473out:
474 spin_unlock_bh(&rose_node_list_lock);
475}
476
477/*
478 * A device has been removed. Remove its routes and neighbours.
479 */
480void rose_rt_device_down(struct net_device *dev)
481{
482 struct rose_neigh *s, *rose_neigh;
483 struct rose_node *t, *rose_node;
484 int i;
485
486 spin_lock_bh(&rose_node_list_lock);
487 spin_lock_bh(&rose_neigh_list_lock);
488 rose_neigh = rose_neigh_list;
489 while (rose_neigh != NULL) {
490 s = rose_neigh;
491 rose_neigh = rose_neigh->next;
492
493 if (s->dev != dev)
494 continue;
495
496 rose_node = rose_node_list;
497
498 while (rose_node != NULL) {
499 t = rose_node;
500 rose_node = rose_node->next;
501
502 for (i = 0; i < t->count; i++) {
503 if (t->neighbour[i] != s)
504 continue;
505
506 t->count--;
507
508 switch (i) {
509 case 0:
510 t->neighbour[0] = t->neighbour[1];
511 case 1:
512 t->neighbour[1] = t->neighbour[2];
513 case 2:
514 break;
515 }
516 }
517
518 if (t->count <= 0)
519 rose_remove_node(t);
520 }
521
522 rose_remove_neigh(s);
523 }
524 spin_unlock_bh(&rose_neigh_list_lock);
525 spin_unlock_bh(&rose_node_list_lock);
526}
527
528#if 0 /* Currently unused */
529/*
530 * A device has been removed. Remove its links.
531 */
532void rose_route_device_down(struct net_device *dev)
533{
534 struct rose_route *s, *rose_route;
535
536 spin_lock_bh(&rose_route_list_lock);
537 rose_route = rose_route_list;
538 while (rose_route != NULL) {
539 s = rose_route;
540 rose_route = rose_route->next;
541
542 if (s->neigh1->dev == dev || s->neigh2->dev == dev)
543 rose_remove_route(s);
544 }
545 spin_unlock_bh(&rose_route_list_lock);
546}
547#endif
548
549/*
550 * Clear all nodes and neighbours out, except for neighbours with
551 * active connections going through them.
552 * Do not clear loopback neighbour and nodes.
553 */
554static int rose_clear_routes(void)
555{
556 struct rose_neigh *s, *rose_neigh;
557 struct rose_node *t, *rose_node;
558
559 spin_lock_bh(&rose_node_list_lock);
560 spin_lock_bh(&rose_neigh_list_lock);
561
562 rose_neigh = rose_neigh_list;
563 rose_node = rose_node_list;
564
565 while (rose_node != NULL) {
566 t = rose_node;
567 rose_node = rose_node->next;
568 if (!t->loopback)
569 rose_remove_node(t);
570 }
571
572 while (rose_neigh != NULL) {
573 s = rose_neigh;
574 rose_neigh = rose_neigh->next;
575
576 if (s->use == 0 && !s->loopback) {
577 s->count = 0;
578 rose_remove_neigh(s);
579 }
580 }
581
582 spin_unlock_bh(&rose_neigh_list_lock);
583 spin_unlock_bh(&rose_node_list_lock);
584
585 return 0;
586}
587
588/*
589 * Check that the device given is a valid AX.25 interface that is "up".
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300590 * called with RTNL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 */
Eric Dumazetb4ec8242009-11-05 20:56:07 -0800592static struct net_device *rose_ax25_dev_find(char *devname)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593{
594 struct net_device *dev;
595
Eric Dumazetb4ec8242009-11-05 20:56:07 -0800596 if ((dev = __dev_get_by_name(&init_net, devname)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 return NULL;
598
599 if ((dev->flags & IFF_UP) && dev->type == ARPHRD_AX25)
600 return dev;
601
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 return NULL;
603}
604
605/*
606 * Find the first active ROSE device, usually "rose0".
607 */
608struct net_device *rose_dev_first(void)
609{
610 struct net_device *dev, *first = NULL;
611
Eric Dumazetc6d14c82009-11-04 05:43:23 -0800612 rcu_read_lock();
613 for_each_netdev_rcu(&init_net, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE)
615 if (first == NULL || strncmp(dev->name, first->name, 3) < 0)
616 first = dev;
617 }
Eric Dumazetc6d14c82009-11-04 05:43:23 -0800618 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619
620 return first;
621}
622
623/*
624 * Find the ROSE device for the given address.
625 */
626struct net_device *rose_dev_get(rose_address *addr)
627{
628 struct net_device *dev;
629
Eric Dumazetc6d14c82009-11-04 05:43:23 -0800630 rcu_read_lock();
631 for_each_netdev_rcu(&init_net, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE && rosecmp(addr, (rose_address *)dev->dev_addr) == 0) {
633 dev_hold(dev);
634 goto out;
635 }
636 }
Pavel Emelianov7562f872007-05-03 15:13:45 -0700637 dev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638out:
Eric Dumazetc6d14c82009-11-04 05:43:23 -0800639 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 return dev;
641}
642
643static int rose_dev_exists(rose_address *addr)
644{
645 struct net_device *dev;
646
Eric Dumazetc6d14c82009-11-04 05:43:23 -0800647 rcu_read_lock();
648 for_each_netdev_rcu(&init_net, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE && rosecmp(addr, (rose_address *)dev->dev_addr) == 0)
650 goto out;
651 }
Pavel Emelianov7562f872007-05-03 15:13:45 -0700652 dev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653out:
Eric Dumazetc6d14c82009-11-04 05:43:23 -0800654 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 return dev != NULL;
656}
657
658
659
660
661struct rose_route *rose_route_free_lci(unsigned int lci, struct rose_neigh *neigh)
662{
663 struct rose_route *rose_route;
664
665 for (rose_route = rose_route_list; rose_route != NULL; rose_route = rose_route->next)
666 if ((rose_route->neigh1 == neigh && rose_route->lci1 == lci) ||
667 (rose_route->neigh2 == neigh && rose_route->lci2 == lci))
668 return rose_route;
669
670 return NULL;
671}
672
673/*
Bernard Pidouxfe2c8022008-06-17 17:08:32 -0700674 * Find a neighbour or a route given a ROSE address.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 */
676struct rose_neigh *rose_get_neigh(rose_address *addr, unsigned char *cause,
Bernard Pidouxc5d8b242011-02-14 13:31:09 -0800677 unsigned char *diagnostic, int route_frame)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678{
679 struct rose_neigh *res = NULL;
680 struct rose_node *node;
681 int failed = 0;
682 int i;
683
Bernard Pidouxc5d8b242011-02-14 13:31:09 -0800684 if (!route_frame) spin_lock_bh(&rose_node_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 for (node = rose_node_list; node != NULL; node = node->next) {
686 if (rosecmpm(addr, &node->address, node->mask) == 0) {
687 for (i = 0; i < node->count; i++) {
Bernard Pidouxc5d8b242011-02-14 13:31:09 -0800688 if (node->neighbour[i]->restarted) {
689 res = node->neighbour[i];
690 goto out;
Bernard Pidouxfe2c8022008-06-17 17:08:32 -0700691 }
Bernard Pidouxc5d8b242011-02-14 13:31:09 -0800692 }
693 }
694 }
695 if (!route_frame) { /* connect request */
696 for (node = rose_node_list; node != NULL; node = node->next) {
697 if (rosecmpm(addr, &node->address, node->mask) == 0) {
698 for (i = 0; i < node->count; i++) {
Bernard Pidouxfe2c8022008-06-17 17:08:32 -0700699 if (!rose_ftimer_running(node->neighbour[i])) {
700 res = node->neighbour[i];
Bernard Pidouxc5d8b242011-02-14 13:31:09 -0800701 failed = 0;
Bernard Pidouxfe2c8022008-06-17 17:08:32 -0700702 goto out;
Bernard Pidouxc5d8b242011-02-14 13:31:09 -0800703 }
704 failed = 1;
Bernard Pidouxfe2c8022008-06-17 17:08:32 -0700705 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 }
708 }
709
710 if (failed) {
711 *cause = ROSE_OUT_OF_ORDER;
712 *diagnostic = 0;
713 } else {
714 *cause = ROSE_NOT_OBTAINABLE;
715 *diagnostic = 0;
716 }
717
718out:
Bernard Pidouxc5d8b242011-02-14 13:31:09 -0800719 if (!route_frame) spin_unlock_bh(&rose_node_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 return res;
721}
722
723/*
724 * Handle the ioctls that control the routing functions.
725 */
726int rose_rt_ioctl(unsigned int cmd, void __user *arg)
727{
728 struct rose_route_struct rose_route;
729 struct net_device *dev;
730 int err;
731
732 switch (cmd) {
733 case SIOCADDRT:
734 if (copy_from_user(&rose_route, arg, sizeof(struct rose_route_struct)))
735 return -EFAULT;
Eric Dumazetb4ec8242009-11-05 20:56:07 -0800736 if ((dev = rose_ax25_dev_find(rose_route.device)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 return -EINVAL;
Eric Dumazetb4ec8242009-11-05 20:56:07 -0800738 if (rose_dev_exists(&rose_route.address)) /* Can't add routes to ourself */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 if (rose_route.mask > 10) /* Mask can't be more than 10 digits */
741 return -EINVAL;
Ralf Baechle95df1c02005-10-18 21:39:33 +0100742 if (rose_route.ndigis > AX25_MAX_DIGIS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 return -EINVAL;
744 err = rose_add_node(&rose_route, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 return err;
746
747 case SIOCDELRT:
748 if (copy_from_user(&rose_route, arg, sizeof(struct rose_route_struct)))
749 return -EFAULT;
Eric Dumazetb4ec8242009-11-05 20:56:07 -0800750 if ((dev = rose_ax25_dev_find(rose_route.device)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 return -EINVAL;
752 err = rose_del_node(&rose_route, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 return err;
754
755 case SIOCRSCLRRT:
756 return rose_clear_routes();
757
758 default:
759 return -EINVAL;
760 }
761
762 return 0;
763}
764
765static void rose_del_route_by_neigh(struct rose_neigh *rose_neigh)
766{
767 struct rose_route *rose_route, *s;
768
769 rose_neigh->restarted = 0;
770
771 rose_stop_t0timer(rose_neigh);
772 rose_start_ftimer(rose_neigh);
773
774 skb_queue_purge(&rose_neigh->queue);
775
776 spin_lock_bh(&rose_route_list_lock);
777
778 rose_route = rose_route_list;
779
780 while (rose_route != NULL) {
781 if ((rose_route->neigh1 == rose_neigh && rose_route->neigh2 == rose_neigh) ||
782 (rose_route->neigh1 == rose_neigh && rose_route->neigh2 == NULL) ||
783 (rose_route->neigh2 == rose_neigh && rose_route->neigh1 == NULL)) {
784 s = rose_route->next;
785 rose_remove_route(rose_route);
786 rose_route = s;
787 continue;
788 }
789
790 if (rose_route->neigh1 == rose_neigh) {
791 rose_route->neigh1->use--;
792 rose_route->neigh1 = NULL;
793 rose_transmit_clear_request(rose_route->neigh2, rose_route->lci2, ROSE_OUT_OF_ORDER, 0);
794 }
795
796 if (rose_route->neigh2 == rose_neigh) {
797 rose_route->neigh2->use--;
798 rose_route->neigh2 = NULL;
799 rose_transmit_clear_request(rose_route->neigh1, rose_route->lci1, ROSE_OUT_OF_ORDER, 0);
800 }
801
802 rose_route = rose_route->next;
803 }
804 spin_unlock_bh(&rose_route_list_lock);
805}
806
807/*
808 * A level 2 link has timed out, therefore it appears to be a poor link,
809 * then don't use that neighbour until it is reset. Blow away all through
810 * routes and connections using this route.
811 */
812void rose_link_failed(ax25_cb *ax25, int reason)
813{
814 struct rose_neigh *rose_neigh;
815
816 spin_lock_bh(&rose_neigh_list_lock);
817 rose_neigh = rose_neigh_list;
818 while (rose_neigh != NULL) {
819 if (rose_neigh->ax25 == ax25)
820 break;
821 rose_neigh = rose_neigh->next;
822 }
823
824 if (rose_neigh != NULL) {
825 rose_neigh->ax25 = NULL;
Jarek Poplawskid00c3622010-01-16 01:04:04 -0800826 ax25_cb_put(ax25);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827
828 rose_del_route_by_neigh(rose_neigh);
829 rose_kill_by_neigh(rose_neigh);
830 }
831 spin_unlock_bh(&rose_neigh_list_lock);
832}
833
834/*
835 * A device has been "downed" remove its link status. Blow away all
836 * through routes and connections that use this device.
837 */
838void rose_link_device_down(struct net_device *dev)
839{
840 struct rose_neigh *rose_neigh;
841
842 for (rose_neigh = rose_neigh_list; rose_neigh != NULL; rose_neigh = rose_neigh->next) {
843 if (rose_neigh->dev == dev) {
844 rose_del_route_by_neigh(rose_neigh);
845 rose_kill_by_neigh(rose_neigh);
846 }
847 }
848}
849
850/*
851 * Route a frame to an appropriate AX.25 connection.
852 */
853int rose_route_frame(struct sk_buff *skb, ax25_cb *ax25)
854{
855 struct rose_neigh *rose_neigh, *new_neigh;
856 struct rose_route *rose_route;
857 struct rose_facilities_struct facilities;
858 rose_address *src_addr, *dest_addr;
859 struct sock *sk;
860 unsigned short frametype;
861 unsigned int lci, new_lci;
862 unsigned char cause, diagnostic;
863 struct net_device *dev;
Ben Hutchingse0bccd32011-03-20 06:48:05 +0000864 int res = 0;
Ralf Baechlef75268c2005-09-06 15:49:39 -0700865 char buf[11];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866
867#if 0
868 if (call_in_firewall(PF_ROSE, skb->dev, skb->data, NULL, &skb) != FW_ACCEPT)
869 return res;
870#endif
871
Ben Hutchingse0bccd32011-03-20 06:48:05 +0000872 if (skb->len < ROSE_MIN_LEN)
873 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 frametype = skb->data[2];
875 lci = ((skb->data[0] << 8) & 0xF00) + ((skb->data[1] << 0) & 0x0FF);
Ben Hutchingse0bccd32011-03-20 06:48:05 +0000876 if (frametype == ROSE_CALL_REQUEST &&
877 (skb->len <= ROSE_CALL_REQ_FACILITIES_OFF ||
878 skb->data[ROSE_CALL_REQ_ADDR_LEN_OFF] !=
879 ROSE_CALL_REQ_ADDR_LEN_VAL))
880 return res;
881 src_addr = (rose_address *)(skb->data + ROSE_CALL_REQ_SRC_ADDR_OFF);
882 dest_addr = (rose_address *)(skb->data + ROSE_CALL_REQ_DEST_ADDR_OFF);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 spin_lock_bh(&rose_neigh_list_lock);
885 spin_lock_bh(&rose_route_list_lock);
886
887 rose_neigh = rose_neigh_list;
888 while (rose_neigh != NULL) {
889 if (ax25cmp(&ax25->dest_addr, &rose_neigh->callsign) == 0 &&
890 ax25->ax25_dev->dev == rose_neigh->dev)
891 break;
892 rose_neigh = rose_neigh->next;
893 }
894
895 if (rose_neigh == NULL) {
896 printk("rose_route : unknown neighbour or device %s\n",
Ralf Baechlef75268c2005-09-06 15:49:39 -0700897 ax2asc(buf, &ax25->dest_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 goto out;
899 }
900
901 /*
902 * Obviously the link is working, halt the ftimer.
903 */
904 rose_stop_ftimer(rose_neigh);
905
906 /*
907 * LCI of zero is always for us, and its always a restart
908 * frame.
909 */
910 if (lci == 0) {
911 rose_link_rx_restart(skb, rose_neigh, frametype);
912 goto out;
913 }
914
915 /*
916 * Find an existing socket.
917 */
918 if ((sk = rose_find_socket(lci, rose_neigh)) != NULL) {
919 if (frametype == ROSE_CALL_REQUEST) {
920 struct rose_sock *rose = rose_sk(sk);
921
922 /* Remove an existing unused socket */
923 rose_clear_queues(sk);
924 rose->cause = ROSE_NETWORK_CONGESTION;
925 rose->diagnostic = 0;
926 rose->neighbour->use--;
927 rose->neighbour = NULL;
928 rose->lci = 0;
929 rose->state = ROSE_STATE_0;
930 sk->sk_state = TCP_CLOSE;
931 sk->sk_err = 0;
932 sk->sk_shutdown |= SEND_SHUTDOWN;
933 if (!sock_flag(sk, SOCK_DEAD)) {
934 sk->sk_state_change(sk);
935 sock_set_flag(sk, SOCK_DEAD);
936 }
937 }
938 else {
Arnaldo Carvalho de Melobadff6d2007-03-13 13:06:52 -0300939 skb_reset_transport_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 res = rose_process_rx_frame(sk, skb);
941 goto out;
942 }
943 }
944
945 /*
946 * Is is a Call Request and is it for us ?
947 */
948 if (frametype == ROSE_CALL_REQUEST)
949 if ((dev = rose_dev_get(dest_addr)) != NULL) {
950 res = rose_rx_call_request(skb, dev, rose_neigh, lci);
951 dev_put(dev);
952 goto out;
953 }
954
955 if (!sysctl_rose_routing_control) {
956 rose_transmit_clear_request(rose_neigh, lci, ROSE_NOT_OBTAINABLE, 0);
957 goto out;
958 }
959
960 /*
961 * Route it to the next in line if we have an entry for it.
962 */
963 rose_route = rose_route_list;
964 while (rose_route != NULL) {
965 if (rose_route->lci1 == lci &&
966 rose_route->neigh1 == rose_neigh) {
967 if (frametype == ROSE_CALL_REQUEST) {
968 /* F6FBB - Remove an existing unused route */
969 rose_remove_route(rose_route);
970 break;
971 } else if (rose_route->neigh2 != NULL) {
972 skb->data[0] &= 0xF0;
973 skb->data[0] |= (rose_route->lci2 >> 8) & 0x0F;
974 skb->data[1] = (rose_route->lci2 >> 0) & 0xFF;
975 rose_transmit_link(skb, rose_route->neigh2);
976 if (frametype == ROSE_CLEAR_CONFIRMATION)
977 rose_remove_route(rose_route);
978 res = 1;
979 goto out;
980 } else {
981 if (frametype == ROSE_CLEAR_CONFIRMATION)
982 rose_remove_route(rose_route);
983 goto out;
984 }
985 }
986 if (rose_route->lci2 == lci &&
987 rose_route->neigh2 == rose_neigh) {
988 if (frametype == ROSE_CALL_REQUEST) {
989 /* F6FBB - Remove an existing unused route */
990 rose_remove_route(rose_route);
991 break;
992 } else if (rose_route->neigh1 != NULL) {
993 skb->data[0] &= 0xF0;
994 skb->data[0] |= (rose_route->lci1 >> 8) & 0x0F;
995 skb->data[1] = (rose_route->lci1 >> 0) & 0xFF;
996 rose_transmit_link(skb, rose_route->neigh1);
997 if (frametype == ROSE_CLEAR_CONFIRMATION)
998 rose_remove_route(rose_route);
999 res = 1;
1000 goto out;
1001 } else {
1002 if (frametype == ROSE_CLEAR_CONFIRMATION)
1003 rose_remove_route(rose_route);
1004 goto out;
1005 }
1006 }
1007 rose_route = rose_route->next;
1008 }
1009
1010 /*
1011 * We know that:
1012 * 1. The frame isn't for us,
1013 * 2. It isn't "owned" by any existing route.
1014 */
David S. Millerdc16aaf2005-08-23 10:50:09 -07001015 if (frametype != ROSE_CALL_REQUEST) { /* XXX */
David S. Millerc1cc1682005-08-23 14:55:32 -07001016 res = 0;
David S. Millerdc16aaf2005-08-23 10:50:09 -07001017 goto out;
1018 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
1021
Ben Hutchingse0bccd32011-03-20 06:48:05 +00001022 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
1023 skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
1024 &facilities)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025 rose_transmit_clear_request(rose_neigh, lci, ROSE_INVALID_FACILITY, 76);
1026 goto out;
1027 }
1028
1029 /*
1030 * Check for routing loops.
1031 */
1032 rose_route = rose_route_list;
1033 while (rose_route != NULL) {
1034 if (rose_route->rand == facilities.rand &&
1035 rosecmp(src_addr, &rose_route->src_addr) == 0 &&
1036 ax25cmp(&facilities.dest_call, &rose_route->src_call) == 0 &&
1037 ax25cmp(&facilities.source_call, &rose_route->dest_call) == 0) {
1038 rose_transmit_clear_request(rose_neigh, lci, ROSE_NOT_OBTAINABLE, 120);
1039 goto out;
1040 }
1041 rose_route = rose_route->next;
1042 }
1043
Bernard Pidouxfe2c8022008-06-17 17:08:32 -07001044 if ((new_neigh = rose_get_neigh(dest_addr, &cause, &diagnostic, 1)) == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 rose_transmit_clear_request(rose_neigh, lci, cause, diagnostic);
1046 goto out;
1047 }
1048
1049 if ((new_lci = rose_new_lci(new_neigh)) == 0) {
1050 rose_transmit_clear_request(rose_neigh, lci, ROSE_NETWORK_CONGESTION, 71);
1051 goto out;
1052 }
1053
1054 if ((rose_route = kmalloc(sizeof(*rose_route), GFP_ATOMIC)) == NULL) {
1055 rose_transmit_clear_request(rose_neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1056 goto out;
1057 }
1058
1059 rose_route->lci1 = lci;
1060 rose_route->src_addr = *src_addr;
1061 rose_route->dest_addr = *dest_addr;
1062 rose_route->src_call = facilities.dest_call;
1063 rose_route->dest_call = facilities.source_call;
1064 rose_route->rand = facilities.rand;
1065 rose_route->neigh1 = rose_neigh;
1066 rose_route->lci2 = new_lci;
1067 rose_route->neigh2 = new_neigh;
1068
1069 rose_route->neigh1->use++;
1070 rose_route->neigh2->use++;
1071
1072 rose_route->next = rose_route_list;
1073 rose_route_list = rose_route;
1074
1075 skb->data[0] &= 0xF0;
1076 skb->data[0] |= (rose_route->lci2 >> 8) & 0x0F;
1077 skb->data[1] = (rose_route->lci2 >> 0) & 0xFF;
1078
1079 rose_transmit_link(skb, rose_route->neigh2);
1080 res = 1;
1081
1082out:
1083 spin_unlock_bh(&rose_route_list_lock);
1084 spin_unlock_bh(&rose_neigh_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085
1086 return res;
1087}
1088
1089#ifdef CONFIG_PROC_FS
1090
1091static void *rose_node_start(struct seq_file *seq, loff_t *pos)
Bernard Pidouxf37f2c62008-05-02 17:03:22 -07001092 __acquires(rose_node_list_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093{
1094 struct rose_node *rose_node;
1095 int i = 1;
1096
Bernard Pidouxf37f2c62008-05-02 17:03:22 -07001097 spin_lock_bh(&rose_node_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 if (*pos == 0)
1099 return SEQ_START_TOKEN;
1100
YOSHIFUJI Hideaki3dcf7c52007-02-09 23:25:12 +09001101 for (rose_node = rose_node_list; rose_node && i < *pos;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 rose_node = rose_node->next, ++i);
1103
1104 return (i == *pos) ? rose_node : NULL;
1105}
1106
1107static void *rose_node_next(struct seq_file *seq, void *v, loff_t *pos)
1108{
1109 ++*pos;
YOSHIFUJI Hideaki3dcf7c52007-02-09 23:25:12 +09001110
1111 return (v == SEQ_START_TOKEN) ? rose_node_list
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 : ((struct rose_node *)v)->next;
1113}
1114
1115static void rose_node_stop(struct seq_file *seq, void *v)
Bernard Pidouxf37f2c62008-05-02 17:03:22 -07001116 __releases(rose_node_list_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117{
Bernard Pidouxf37f2c62008-05-02 17:03:22 -07001118 spin_unlock_bh(&rose_node_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119}
1120
1121static int rose_node_show(struct seq_file *seq, void *v)
1122{
Ralf Baechledcf777f2009-07-26 19:11:14 -07001123 char rsbuf[11];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 int i;
1125
1126 if (v == SEQ_START_TOKEN)
1127 seq_puts(seq, "address mask n neigh neigh neigh\n");
1128 else {
1129 const struct rose_node *rose_node = v;
1130 /* if (rose_node->loopback) {
1131 seq_printf(seq, "%-10s %04d 1 loopback\n",
Ralf Baechledcf777f2009-07-26 19:11:14 -07001132 rose2asc(rsbuf, &rose_node->address),
1133 rose_node->mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 } else { */
1135 seq_printf(seq, "%-10s %04d %d",
Ralf Baechledcf777f2009-07-26 19:11:14 -07001136 rose2asc(rsbuf, &rose_node->address),
1137 rose_node->mask,
1138 rose_node->count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139
1140 for (i = 0; i < rose_node->count; i++)
1141 seq_printf(seq, " %05d",
1142 rose_node->neighbour[i]->number);
1143
1144 seq_puts(seq, "\n");
1145 /* } */
1146 }
1147 return 0;
1148}
1149
Philippe De Muyter56b3d972007-07-10 23:07:31 -07001150static const struct seq_operations rose_node_seqops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 .start = rose_node_start,
1152 .next = rose_node_next,
1153 .stop = rose_node_stop,
1154 .show = rose_node_show,
1155};
1156
1157static int rose_nodes_open(struct inode *inode, struct file *file)
1158{
1159 return seq_open(file, &rose_node_seqops);
1160}
1161
Arjan van de Venda7071d2007-02-12 00:55:36 -08001162const struct file_operations rose_nodes_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 .owner = THIS_MODULE,
1164 .open = rose_nodes_open,
1165 .read = seq_read,
1166 .llseek = seq_lseek,
1167 .release = seq_release,
1168};
1169
1170static void *rose_neigh_start(struct seq_file *seq, loff_t *pos)
Eric Dumazet95b7d922008-01-15 03:30:35 -08001171 __acquires(rose_neigh_list_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172{
1173 struct rose_neigh *rose_neigh;
1174 int i = 1;
1175
1176 spin_lock_bh(&rose_neigh_list_lock);
1177 if (*pos == 0)
1178 return SEQ_START_TOKEN;
1179
YOSHIFUJI Hideaki3dcf7c52007-02-09 23:25:12 +09001180 for (rose_neigh = rose_neigh_list; rose_neigh && i < *pos;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181 rose_neigh = rose_neigh->next, ++i);
1182
1183 return (i == *pos) ? rose_neigh : NULL;
1184}
1185
1186static void *rose_neigh_next(struct seq_file *seq, void *v, loff_t *pos)
1187{
1188 ++*pos;
YOSHIFUJI Hideaki3dcf7c52007-02-09 23:25:12 +09001189
1190 return (v == SEQ_START_TOKEN) ? rose_neigh_list
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 : ((struct rose_neigh *)v)->next;
1192}
1193
1194static void rose_neigh_stop(struct seq_file *seq, void *v)
Eric Dumazet95b7d922008-01-15 03:30:35 -08001195 __releases(rose_neigh_list_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196{
1197 spin_unlock_bh(&rose_neigh_list_lock);
1198}
1199
1200static int rose_neigh_show(struct seq_file *seq, void *v)
1201{
Ralf Baechlef75268c2005-09-06 15:49:39 -07001202 char buf[11];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 int i;
1204
1205 if (v == SEQ_START_TOKEN)
YOSHIFUJI Hideaki3dcf7c52007-02-09 23:25:12 +09001206 seq_puts(seq,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 "addr callsign dev count use mode restart t0 tf digipeaters\n");
1208 else {
1209 struct rose_neigh *rose_neigh = v;
1210
1211 /* if (!rose_neigh->loopback) { */
1212 seq_printf(seq, "%05d %-9s %-4s %3d %3d %3s %3s %3lu %3lu",
1213 rose_neigh->number,
Ralf Baechlef75268c2005-09-06 15:49:39 -07001214 (rose_neigh->loopback) ? "RSLOOP-0" : ax2asc(buf, &rose_neigh->callsign),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 rose_neigh->dev ? rose_neigh->dev->name : "???",
1216 rose_neigh->count,
1217 rose_neigh->use,
1218 (rose_neigh->dce_mode) ? "DCE" : "DTE",
1219 (rose_neigh->restarted) ? "yes" : "no",
1220 ax25_display_timer(&rose_neigh->t0timer) / HZ,
1221 ax25_display_timer(&rose_neigh->ftimer) / HZ);
1222
1223 if (rose_neigh->digipeat != NULL) {
1224 for (i = 0; i < rose_neigh->digipeat->ndigi; i++)
Ralf Baechlef75268c2005-09-06 15:49:39 -07001225 seq_printf(seq, " %s", ax2asc(buf, &rose_neigh->digipeat->calls[i]));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226 }
1227
1228 seq_puts(seq, "\n");
1229 }
1230 return 0;
1231}
1232
1233
Philippe De Muyter56b3d972007-07-10 23:07:31 -07001234static const struct seq_operations rose_neigh_seqops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235 .start = rose_neigh_start,
1236 .next = rose_neigh_next,
1237 .stop = rose_neigh_stop,
1238 .show = rose_neigh_show,
1239};
1240
1241static int rose_neigh_open(struct inode *inode, struct file *file)
1242{
1243 return seq_open(file, &rose_neigh_seqops);
1244}
1245
Arjan van de Venda7071d2007-02-12 00:55:36 -08001246const struct file_operations rose_neigh_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247 .owner = THIS_MODULE,
1248 .open = rose_neigh_open,
1249 .read = seq_read,
1250 .llseek = seq_lseek,
1251 .release = seq_release,
1252};
1253
1254
1255static void *rose_route_start(struct seq_file *seq, loff_t *pos)
Eric Dumazet95b7d922008-01-15 03:30:35 -08001256 __acquires(rose_route_list_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257{
1258 struct rose_route *rose_route;
1259 int i = 1;
1260
1261 spin_lock_bh(&rose_route_list_lock);
1262 if (*pos == 0)
1263 return SEQ_START_TOKEN;
1264
YOSHIFUJI Hideaki3dcf7c52007-02-09 23:25:12 +09001265 for (rose_route = rose_route_list; rose_route && i < *pos;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 rose_route = rose_route->next, ++i);
1267
1268 return (i == *pos) ? rose_route : NULL;
1269}
1270
1271static void *rose_route_next(struct seq_file *seq, void *v, loff_t *pos)
1272{
1273 ++*pos;
YOSHIFUJI Hideaki3dcf7c52007-02-09 23:25:12 +09001274
1275 return (v == SEQ_START_TOKEN) ? rose_route_list
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 : ((struct rose_route *)v)->next;
1277}
1278
1279static void rose_route_stop(struct seq_file *seq, void *v)
Eric Dumazet95b7d922008-01-15 03:30:35 -08001280 __releases(rose_route_list_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281{
1282 spin_unlock_bh(&rose_route_list_lock);
1283}
1284
1285static int rose_route_show(struct seq_file *seq, void *v)
1286{
Ralf Baechledcf777f2009-07-26 19:11:14 -07001287 char buf[11], rsbuf[11];
Ralf Baechlef75268c2005-09-06 15:49:39 -07001288
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289 if (v == SEQ_START_TOKEN)
YOSHIFUJI Hideaki3dcf7c52007-02-09 23:25:12 +09001290 seq_puts(seq,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 "lci address callsign neigh <-> lci address callsign neigh\n");
1292 else {
1293 struct rose_route *rose_route = v;
1294
YOSHIFUJI Hideaki3dcf7c52007-02-09 23:25:12 +09001295 if (rose_route->neigh1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 seq_printf(seq,
1297 "%3.3X %-10s %-9s %05d ",
1298 rose_route->lci1,
Ralf Baechledcf777f2009-07-26 19:11:14 -07001299 rose2asc(rsbuf, &rose_route->src_addr),
Ralf Baechlef75268c2005-09-06 15:49:39 -07001300 ax2asc(buf, &rose_route->src_call),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 rose_route->neigh1->number);
YOSHIFUJI Hideaki3dcf7c52007-02-09 23:25:12 +09001302 else
1303 seq_puts(seq,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304 "000 * * 00000 ");
1305
YOSHIFUJI Hideaki3dcf7c52007-02-09 23:25:12 +09001306 if (rose_route->neigh2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 seq_printf(seq,
1308 "%3.3X %-10s %-9s %05d\n",
Ralf Baechledcf777f2009-07-26 19:11:14 -07001309 rose_route->lci2,
1310 rose2asc(rsbuf, &rose_route->dest_addr),
1311 ax2asc(buf, &rose_route->dest_call),
1312 rose_route->neigh2->number);
YOSHIFUJI Hideaki3dcf7c52007-02-09 23:25:12 +09001313 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314 seq_puts(seq,
1315 "000 * * 00000\n");
1316 }
1317 return 0;
1318}
1319
Philippe De Muyter56b3d972007-07-10 23:07:31 -07001320static const struct seq_operations rose_route_seqops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321 .start = rose_route_start,
1322 .next = rose_route_next,
1323 .stop = rose_route_stop,
1324 .show = rose_route_show,
1325};
1326
1327static int rose_route_open(struct inode *inode, struct file *file)
1328{
1329 return seq_open(file, &rose_route_seqops);
1330}
1331
Arjan van de Venda7071d2007-02-12 00:55:36 -08001332const struct file_operations rose_routes_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333 .owner = THIS_MODULE,
1334 .open = rose_route_open,
1335 .read = seq_read,
1336 .llseek = seq_lseek,
1337 .release = seq_release,
1338};
1339
1340#endif /* CONFIG_PROC_FS */
1341
1342/*
1343 * Release all memory associated with ROSE routing structures.
1344 */
1345void __exit rose_rt_free(void)
1346{
1347 struct rose_neigh *s, *rose_neigh = rose_neigh_list;
1348 struct rose_node *t, *rose_node = rose_node_list;
1349 struct rose_route *u, *rose_route = rose_route_list;
1350
1351 while (rose_neigh != NULL) {
1352 s = rose_neigh;
1353 rose_neigh = rose_neigh->next;
1354
1355 rose_remove_neigh(s);
1356 }
1357
1358 while (rose_node != NULL) {
1359 t = rose_node;
1360 rose_node = rose_node->next;
1361
1362 rose_remove_node(t);
1363 }
1364
1365 while (rose_route != NULL) {
1366 u = rose_route;
1367 rose_route = rose_route->next;
1368
1369 rose_remove_route(u);
1370 }
1371}