Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * |
4 | * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) | |
5 | * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net) | |
6 | */ | |
7 | #include <linux/errno.h> | |
8 | #include <linux/types.h> | |
9 | #include <linux/socket.h> | |
10 | #include <linux/in.h> | |
11 | #include <linux/kernel.h> | |
1da177e4 LT |
12 | #include <linux/timer.h> |
13 | #include <linux/string.h> | |
14 | #include <linux/sockios.h> | |
15 | #include <linux/net.h> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
1da177e4 LT |
17 | #include <net/ax25.h> |
18 | #include <linux/inet.h> | |
19 | #include <linux/netdevice.h> | |
20 | #include <net/arp.h> | |
21 | #include <linux/if_arp.h> | |
22 | #include <linux/skbuff.h> | |
23 | #include <net/sock.h> | |
c752f073 | 24 | #include <net/tcp_states.h> |
7c0f6ba6 | 25 | #include <linux/uaccess.h> |
1da177e4 LT |
26 | #include <linux/fcntl.h> |
27 | #include <linux/termios.h> /* For TIOCINQ/OUTQ */ | |
28 | #include <linux/mm.h> | |
29 | #include <linux/interrupt.h> | |
30 | #include <linux/notifier.h> | |
1da177e4 LT |
31 | #include <linux/init.h> |
32 | #include <net/rose.h> | |
33 | #include <linux/seq_file.h> | |
bc3b2d7f | 34 | #include <linux/export.h> |
1da177e4 LT |
35 | |
36 | static unsigned int rose_neigh_no = 1; | |
37 | ||
38 | static struct rose_node *rose_node_list; | |
39 | static DEFINE_SPINLOCK(rose_node_list_lock); | |
40 | static struct rose_neigh *rose_neigh_list; | |
41 | static DEFINE_SPINLOCK(rose_neigh_list_lock); | |
42 | static struct rose_route *rose_route_list; | |
43 | static DEFINE_SPINLOCK(rose_route_list_lock); | |
44 | ||
891e6a93 | 45 | struct rose_neigh *rose_loopback_neigh; |
1da177e4 | 46 | |
1da177e4 LT |
47 | /* |
48 | * Add a new route to a node, and in the process add the node and the | |
49 | * neighbour if it is new. | |
50 | */ | |
c9266b99 | 51 | static int __must_check rose_add_node(struct rose_route_struct *rose_route, |
1da177e4 LT |
52 | struct net_device *dev) |
53 | { | |
54 | struct rose_node *rose_node, *rose_tmpn, *rose_tmpp; | |
55 | struct rose_neigh *rose_neigh; | |
56 | int i, res = 0; | |
57 | ||
58 | spin_lock_bh(&rose_node_list_lock); | |
59 | spin_lock_bh(&rose_neigh_list_lock); | |
60 | ||
61 | rose_node = rose_node_list; | |
62 | while (rose_node != NULL) { | |
63 | if ((rose_node->mask == rose_route->mask) && | |
64 | (rosecmpm(&rose_route->address, &rose_node->address, | |
3dcf7c5e | 65 | rose_route->mask) == 0)) |
1da177e4 LT |
66 | break; |
67 | rose_node = rose_node->next; | |
68 | } | |
69 | ||
70 | if (rose_node != NULL && rose_node->loopback) { | |
71 | res = -EINVAL; | |
72 | goto out; | |
73 | } | |
74 | ||
75 | rose_neigh = rose_neigh_list; | |
76 | while (rose_neigh != NULL) { | |
f64f9e71 JP |
77 | if (ax25cmp(&rose_route->neighbour, |
78 | &rose_neigh->callsign) == 0 && | |
79 | rose_neigh->dev == dev) | |
1da177e4 LT |
80 | break; |
81 | rose_neigh = rose_neigh->next; | |
82 | } | |
83 | ||
84 | if (rose_neigh == NULL) { | |
85 | rose_neigh = kmalloc(sizeof(*rose_neigh), GFP_ATOMIC); | |
86 | if (rose_neigh == NULL) { | |
87 | res = -ENOMEM; | |
88 | goto out; | |
89 | } | |
90 | ||
91 | rose_neigh->callsign = rose_route->neighbour; | |
92 | rose_neigh->digipeat = NULL; | |
93 | rose_neigh->ax25 = NULL; | |
94 | rose_neigh->dev = dev; | |
95 | rose_neigh->count = 0; | |
96 | rose_neigh->use = 0; | |
97 | rose_neigh->dce_mode = 0; | |
98 | rose_neigh->loopback = 0; | |
99 | rose_neigh->number = rose_neigh_no++; | |
100 | rose_neigh->restarted = 0; | |
101 | ||
102 | skb_queue_head_init(&rose_neigh->queue); | |
103 | ||
4966babd KC |
104 | timer_setup(&rose_neigh->ftimer, NULL, 0); |
105 | timer_setup(&rose_neigh->t0timer, NULL, 0); | |
1da177e4 LT |
106 | |
107 | if (rose_route->ndigis != 0) { | |
e2e0c7c9 JL |
108 | rose_neigh->digipeat = |
109 | kmalloc(sizeof(ax25_digi), GFP_ATOMIC); | |
110 | if (rose_neigh->digipeat == NULL) { | |
1da177e4 LT |
111 | kfree(rose_neigh); |
112 | res = -ENOMEM; | |
113 | goto out; | |
114 | } | |
115 | ||
116 | rose_neigh->digipeat->ndigi = rose_route->ndigis; | |
117 | rose_neigh->digipeat->lastrepeat = -1; | |
118 | ||
119 | for (i = 0; i < rose_route->ndigis; i++) { | |
120 | rose_neigh->digipeat->calls[i] = | |
121 | rose_route->digipeaters[i]; | |
122 | rose_neigh->digipeat->repeated[i] = 0; | |
123 | } | |
124 | } | |
125 | ||
126 | rose_neigh->next = rose_neigh_list; | |
127 | rose_neigh_list = rose_neigh; | |
128 | } | |
129 | ||
130 | /* | |
131 | * This is a new node to be inserted into the list. Find where it needs | |
132 | * to be inserted into the list, and insert it. We want to be sure | |
133 | * to order the list in descending order of mask size to ensure that | |
134 | * later when we are searching this list the first match will be the | |
135 | * best match. | |
136 | */ | |
137 | if (rose_node == NULL) { | |
138 | rose_tmpn = rose_node_list; | |
139 | rose_tmpp = NULL; | |
140 | ||
141 | while (rose_tmpn != NULL) { | |
142 | if (rose_tmpn->mask > rose_route->mask) { | |
143 | rose_tmpp = rose_tmpn; | |
144 | rose_tmpn = rose_tmpn->next; | |
145 | } else { | |
146 | break; | |
147 | } | |
148 | } | |
149 | ||
150 | /* create new node */ | |
151 | rose_node = kmalloc(sizeof(*rose_node), GFP_ATOMIC); | |
152 | if (rose_node == NULL) { | |
153 | res = -ENOMEM; | |
154 | goto out; | |
155 | } | |
156 | ||
157 | rose_node->address = rose_route->address; | |
158 | rose_node->mask = rose_route->mask; | |
159 | rose_node->count = 1; | |
160 | rose_node->loopback = 0; | |
161 | rose_node->neighbour[0] = rose_neigh; | |
162 | ||
163 | if (rose_tmpn == NULL) { | |
164 | if (rose_tmpp == NULL) { /* Empty list */ | |
165 | rose_node_list = rose_node; | |
166 | rose_node->next = NULL; | |
167 | } else { | |
168 | rose_tmpp->next = rose_node; | |
169 | rose_node->next = NULL; | |
170 | } | |
171 | } else { | |
172 | if (rose_tmpp == NULL) { /* 1st node */ | |
173 | rose_node->next = rose_node_list; | |
174 | rose_node_list = rose_node; | |
175 | } else { | |
176 | rose_tmpp->next = rose_node; | |
177 | rose_node->next = rose_tmpn; | |
178 | } | |
179 | } | |
180 | rose_neigh->count++; | |
181 | ||
182 | goto out; | |
183 | } | |
184 | ||
185 | /* We have space, slot it in */ | |
186 | if (rose_node->count < 3) { | |
187 | rose_node->neighbour[rose_node->count] = rose_neigh; | |
188 | rose_node->count++; | |
189 | rose_neigh->count++; | |
190 | } | |
191 | ||
192 | out: | |
193 | spin_unlock_bh(&rose_neigh_list_lock); | |
194 | spin_unlock_bh(&rose_node_list_lock); | |
195 | ||
196 | return res; | |
197 | } | |
198 | ||
199 | /* | |
200 | * Caller is holding rose_node_list_lock. | |
201 | */ | |
202 | static void rose_remove_node(struct rose_node *rose_node) | |
203 | { | |
204 | struct rose_node *s; | |
205 | ||
206 | if ((s = rose_node_list) == rose_node) { | |
207 | rose_node_list = rose_node->next; | |
208 | kfree(rose_node); | |
209 | return; | |
210 | } | |
211 | ||
212 | while (s != NULL && s->next != NULL) { | |
213 | if (s->next == rose_node) { | |
214 | s->next = rose_node->next; | |
215 | kfree(rose_node); | |
216 | return; | |
217 | } | |
218 | ||
219 | s = s->next; | |
220 | } | |
221 | } | |
222 | ||
223 | /* | |
224 | * Caller is holding rose_neigh_list_lock. | |
225 | */ | |
226 | static void rose_remove_neigh(struct rose_neigh *rose_neigh) | |
227 | { | |
228 | struct rose_neigh *s; | |
229 | ||
230 | rose_stop_ftimer(rose_neigh); | |
231 | rose_stop_t0timer(rose_neigh); | |
232 | ||
233 | skb_queue_purge(&rose_neigh->queue); | |
234 | ||
1da177e4 LT |
235 | if ((s = rose_neigh_list) == rose_neigh) { |
236 | rose_neigh_list = rose_neigh->next; | |
d00c362f JP |
237 | if (rose_neigh->ax25) |
238 | ax25_cb_put(rose_neigh->ax25); | |
a51482bd | 239 | kfree(rose_neigh->digipeat); |
1da177e4 LT |
240 | kfree(rose_neigh); |
241 | return; | |
242 | } | |
243 | ||
244 | while (s != NULL && s->next != NULL) { | |
245 | if (s->next == rose_neigh) { | |
246 | s->next = rose_neigh->next; | |
d00c362f JP |
247 | if (rose_neigh->ax25) |
248 | ax25_cb_put(rose_neigh->ax25); | |
a51482bd | 249 | kfree(rose_neigh->digipeat); |
1da177e4 LT |
250 | kfree(rose_neigh); |
251 | return; | |
252 | } | |
253 | ||
254 | s = s->next; | |
255 | } | |
1da177e4 LT |
256 | } |
257 | ||
258 | /* | |
259 | * Caller is holding rose_route_list_lock. | |
260 | */ | |
261 | static void rose_remove_route(struct rose_route *rose_route) | |
262 | { | |
263 | struct rose_route *s; | |
264 | ||
265 | if (rose_route->neigh1 != NULL) | |
266 | rose_route->neigh1->use--; | |
267 | ||
268 | if (rose_route->neigh2 != NULL) | |
269 | rose_route->neigh2->use--; | |
270 | ||
271 | if ((s = rose_route_list) == rose_route) { | |
272 | rose_route_list = rose_route->next; | |
273 | kfree(rose_route); | |
274 | return; | |
275 | } | |
276 | ||
277 | while (s != NULL && s->next != NULL) { | |
278 | if (s->next == rose_route) { | |
279 | s->next = rose_route->next; | |
280 | kfree(rose_route); | |
281 | return; | |
282 | } | |
283 | ||
284 | s = s->next; | |
285 | } | |
286 | } | |
287 | ||
288 | /* | |
289 | * "Delete" a node. Strictly speaking remove a route to a node. The node | |
290 | * is only deleted if no routes are left to it. | |
291 | */ | |
292 | static int rose_del_node(struct rose_route_struct *rose_route, | |
293 | struct net_device *dev) | |
294 | { | |
295 | struct rose_node *rose_node; | |
296 | struct rose_neigh *rose_neigh; | |
297 | int i, err = 0; | |
298 | ||
299 | spin_lock_bh(&rose_node_list_lock); | |
300 | spin_lock_bh(&rose_neigh_list_lock); | |
301 | ||
302 | rose_node = rose_node_list; | |
303 | while (rose_node != NULL) { | |
304 | if ((rose_node->mask == rose_route->mask) && | |
305 | (rosecmpm(&rose_route->address, &rose_node->address, | |
3dcf7c5e | 306 | rose_route->mask) == 0)) |
1da177e4 LT |
307 | break; |
308 | rose_node = rose_node->next; | |
309 | } | |
310 | ||
311 | if (rose_node == NULL || rose_node->loopback) { | |
312 | err = -EINVAL; | |
313 | goto out; | |
314 | } | |
315 | ||
316 | rose_neigh = rose_neigh_list; | |
317 | while (rose_neigh != NULL) { | |
f64f9e71 JP |
318 | if (ax25cmp(&rose_route->neighbour, |
319 | &rose_neigh->callsign) == 0 && | |
320 | rose_neigh->dev == dev) | |
1da177e4 LT |
321 | break; |
322 | rose_neigh = rose_neigh->next; | |
323 | } | |
324 | ||
325 | if (rose_neigh == NULL) { | |
326 | err = -EINVAL; | |
327 | goto out; | |
328 | } | |
329 | ||
330 | for (i = 0; i < rose_node->count; i++) { | |
331 | if (rose_node->neighbour[i] == rose_neigh) { | |
332 | rose_neigh->count--; | |
333 | ||
334 | if (rose_neigh->count == 0 && rose_neigh->use == 0) | |
335 | rose_remove_neigh(rose_neigh); | |
336 | ||
337 | rose_node->count--; | |
338 | ||
339 | if (rose_node->count == 0) { | |
340 | rose_remove_node(rose_node); | |
341 | } else { | |
342 | switch (i) { | |
343 | case 0: | |
344 | rose_node->neighbour[0] = | |
345 | rose_node->neighbour[1]; | |
a05b8c43 | 346 | /* fall through */ |
1da177e4 LT |
347 | case 1: |
348 | rose_node->neighbour[1] = | |
349 | rose_node->neighbour[2]; | |
350 | case 2: | |
351 | break; | |
352 | } | |
353 | } | |
354 | goto out; | |
355 | } | |
356 | } | |
357 | err = -EINVAL; | |
358 | ||
359 | out: | |
360 | spin_unlock_bh(&rose_neigh_list_lock); | |
361 | spin_unlock_bh(&rose_node_list_lock); | |
362 | ||
363 | return err; | |
364 | } | |
365 | ||
366 | /* | |
367 | * Add the loopback neighbour. | |
368 | */ | |
a3d38402 | 369 | void rose_add_loopback_neigh(void) |
1da177e4 | 370 | { |
891e6a93 AD |
371 | struct rose_neigh *sn; |
372 | ||
373 | rose_loopback_neigh = kmalloc(sizeof(struct rose_neigh), GFP_KERNEL); | |
374 | if (!rose_loopback_neigh) | |
375 | return; | |
376 | sn = rose_loopback_neigh; | |
1da177e4 | 377 | |
a3d38402 RB |
378 | sn->callsign = null_ax25_address; |
379 | sn->digipeat = NULL; | |
380 | sn->ax25 = NULL; | |
381 | sn->dev = NULL; | |
382 | sn->count = 0; | |
383 | sn->use = 0; | |
384 | sn->dce_mode = 1; | |
385 | sn->loopback = 1; | |
386 | sn->number = rose_neigh_no++; | |
387 | sn->restarted = 1; | |
1da177e4 | 388 | |
a3d38402 | 389 | skb_queue_head_init(&sn->queue); |
1da177e4 | 390 | |
4966babd KC |
391 | timer_setup(&sn->ftimer, NULL, 0); |
392 | timer_setup(&sn->t0timer, NULL, 0); | |
1da177e4 LT |
393 | |
394 | spin_lock_bh(&rose_neigh_list_lock); | |
a3d38402 RB |
395 | sn->next = rose_neigh_list; |
396 | rose_neigh_list = sn; | |
1da177e4 | 397 | spin_unlock_bh(&rose_neigh_list_lock); |
1da177e4 LT |
398 | } |
399 | ||
400 | /* | |
401 | * Add a loopback node. | |
402 | */ | |
403 | int rose_add_loopback_node(rose_address *address) | |
404 | { | |
405 | struct rose_node *rose_node; | |
0506d406 | 406 | int err = 0; |
1da177e4 LT |
407 | |
408 | spin_lock_bh(&rose_node_list_lock); | |
409 | ||
410 | rose_node = rose_node_list; | |
411 | while (rose_node != NULL) { | |
412 | if ((rose_node->mask == 10) && | |
413 | (rosecmpm(address, &rose_node->address, 10) == 0) && | |
414 | rose_node->loopback) | |
415 | break; | |
416 | rose_node = rose_node->next; | |
417 | } | |
418 | ||
419 | if (rose_node != NULL) | |
420 | goto out; | |
421 | ||
422 | if ((rose_node = kmalloc(sizeof(*rose_node), GFP_ATOMIC)) == NULL) { | |
423 | err = -ENOMEM; | |
424 | goto out; | |
425 | } | |
426 | ||
427 | rose_node->address = *address; | |
428 | rose_node->mask = 10; | |
429 | rose_node->count = 1; | |
430 | rose_node->loopback = 1; | |
891e6a93 | 431 | rose_node->neighbour[0] = rose_loopback_neigh; |
1da177e4 LT |
432 | |
433 | /* Insert at the head of list. Address is always mask=10 */ | |
434 | rose_node->next = rose_node_list; | |
435 | rose_node_list = rose_node; | |
436 | ||
891e6a93 | 437 | rose_loopback_neigh->count++; |
1da177e4 LT |
438 | |
439 | out: | |
440 | spin_unlock_bh(&rose_node_list_lock); | |
441 | ||
0506d406 | 442 | return err; |
1da177e4 LT |
443 | } |
444 | ||
445 | /* | |
446 | * Delete a loopback node. | |
447 | */ | |
448 | void rose_del_loopback_node(rose_address *address) | |
449 | { | |
450 | struct rose_node *rose_node; | |
451 | ||
452 | spin_lock_bh(&rose_node_list_lock); | |
453 | ||
454 | rose_node = rose_node_list; | |
455 | while (rose_node != NULL) { | |
456 | if ((rose_node->mask == 10) && | |
457 | (rosecmpm(address, &rose_node->address, 10) == 0) && | |
458 | rose_node->loopback) | |
459 | break; | |
460 | rose_node = rose_node->next; | |
461 | } | |
462 | ||
463 | if (rose_node == NULL) | |
464 | goto out; | |
465 | ||
466 | rose_remove_node(rose_node); | |
467 | ||
891e6a93 | 468 | rose_loopback_neigh->count--; |
1da177e4 LT |
469 | |
470 | out: | |
471 | spin_unlock_bh(&rose_node_list_lock); | |
472 | } | |
473 | ||
474 | /* | |
475 | * A device has been removed. Remove its routes and neighbours. | |
476 | */ | |
477 | void rose_rt_device_down(struct net_device *dev) | |
478 | { | |
479 | struct rose_neigh *s, *rose_neigh; | |
480 | struct rose_node *t, *rose_node; | |
481 | int i; | |
482 | ||
483 | spin_lock_bh(&rose_node_list_lock); | |
484 | spin_lock_bh(&rose_neigh_list_lock); | |
485 | rose_neigh = rose_neigh_list; | |
486 | while (rose_neigh != NULL) { | |
487 | s = rose_neigh; | |
488 | rose_neigh = rose_neigh->next; | |
489 | ||
490 | if (s->dev != dev) | |
491 | continue; | |
492 | ||
493 | rose_node = rose_node_list; | |
494 | ||
495 | while (rose_node != NULL) { | |
496 | t = rose_node; | |
497 | rose_node = rose_node->next; | |
498 | ||
499 | for (i = 0; i < t->count; i++) { | |
500 | if (t->neighbour[i] != s) | |
501 | continue; | |
502 | ||
503 | t->count--; | |
504 | ||
505 | switch (i) { | |
506 | case 0: | |
507 | t->neighbour[0] = t->neighbour[1]; | |
a05b8c43 | 508 | /* fall through */ |
1da177e4 LT |
509 | case 1: |
510 | t->neighbour[1] = t->neighbour[2]; | |
511 | case 2: | |
512 | break; | |
513 | } | |
514 | } | |
515 | ||
516 | if (t->count <= 0) | |
517 | rose_remove_node(t); | |
518 | } | |
519 | ||
520 | rose_remove_neigh(s); | |
521 | } | |
522 | spin_unlock_bh(&rose_neigh_list_lock); | |
523 | spin_unlock_bh(&rose_node_list_lock); | |
524 | } | |
525 | ||
526 | #if 0 /* Currently unused */ | |
527 | /* | |
528 | * A device has been removed. Remove its links. | |
529 | */ | |
530 | void rose_route_device_down(struct net_device *dev) | |
531 | { | |
532 | struct rose_route *s, *rose_route; | |
533 | ||
534 | spin_lock_bh(&rose_route_list_lock); | |
535 | rose_route = rose_route_list; | |
536 | while (rose_route != NULL) { | |
537 | s = rose_route; | |
538 | rose_route = rose_route->next; | |
539 | ||
540 | if (s->neigh1->dev == dev || s->neigh2->dev == dev) | |
541 | rose_remove_route(s); | |
542 | } | |
543 | spin_unlock_bh(&rose_route_list_lock); | |
544 | } | |
545 | #endif | |
546 | ||
547 | /* | |
548 | * Clear all nodes and neighbours out, except for neighbours with | |
549 | * active connections going through them. | |
550 | * Do not clear loopback neighbour and nodes. | |
551 | */ | |
552 | static int rose_clear_routes(void) | |
553 | { | |
554 | struct rose_neigh *s, *rose_neigh; | |
555 | struct rose_node *t, *rose_node; | |
556 | ||
557 | spin_lock_bh(&rose_node_list_lock); | |
558 | spin_lock_bh(&rose_neigh_list_lock); | |
559 | ||
560 | rose_neigh = rose_neigh_list; | |
561 | rose_node = rose_node_list; | |
562 | ||
563 | while (rose_node != NULL) { | |
564 | t = rose_node; | |
565 | rose_node = rose_node->next; | |
566 | if (!t->loopback) | |
567 | rose_remove_node(t); | |
568 | } | |
569 | ||
570 | while (rose_neigh != NULL) { | |
571 | s = rose_neigh; | |
572 | rose_neigh = rose_neigh->next; | |
573 | ||
574 | if (s->use == 0 && !s->loopback) { | |
575 | s->count = 0; | |
576 | rose_remove_neigh(s); | |
577 | } | |
578 | } | |
579 | ||
580 | spin_unlock_bh(&rose_neigh_list_lock); | |
581 | spin_unlock_bh(&rose_node_list_lock); | |
582 | ||
583 | return 0; | |
584 | } | |
585 | ||
586 | /* | |
587 | * Check that the device given is a valid AX.25 interface that is "up". | |
25985edc | 588 | * called with RTNL |
1da177e4 | 589 | */ |
b4ec8240 | 590 | static struct net_device *rose_ax25_dev_find(char *devname) |
1da177e4 LT |
591 | { |
592 | struct net_device *dev; | |
593 | ||
b4ec8240 | 594 | if ((dev = __dev_get_by_name(&init_net, devname)) == NULL) |
1da177e4 LT |
595 | return NULL; |
596 | ||
597 | if ((dev->flags & IFF_UP) && dev->type == ARPHRD_AX25) | |
598 | return dev; | |
599 | ||
1da177e4 LT |
600 | return NULL; |
601 | } | |
602 | ||
603 | /* | |
604 | * Find the first active ROSE device, usually "rose0". | |
605 | */ | |
606 | struct net_device *rose_dev_first(void) | |
607 | { | |
608 | struct net_device *dev, *first = NULL; | |
609 | ||
c6d14c84 ED |
610 | rcu_read_lock(); |
611 | for_each_netdev_rcu(&init_net, dev) { | |
1da177e4 LT |
612 | if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE) |
613 | if (first == NULL || strncmp(dev->name, first->name, 3) < 0) | |
614 | first = dev; | |
615 | } | |
c6d14c84 | 616 | rcu_read_unlock(); |
1da177e4 LT |
617 | |
618 | return first; | |
619 | } | |
620 | ||
621 | /* | |
622 | * Find the ROSE device for the given address. | |
623 | */ | |
624 | struct net_device *rose_dev_get(rose_address *addr) | |
625 | { | |
626 | struct net_device *dev; | |
627 | ||
c6d14c84 ED |
628 | rcu_read_lock(); |
629 | for_each_netdev_rcu(&init_net, dev) { | |
1da177e4 LT |
630 | if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE && rosecmp(addr, (rose_address *)dev->dev_addr) == 0) { |
631 | dev_hold(dev); | |
632 | goto out; | |
633 | } | |
634 | } | |
7562f876 | 635 | dev = NULL; |
1da177e4 | 636 | out: |
c6d14c84 | 637 | rcu_read_unlock(); |
1da177e4 LT |
638 | return dev; |
639 | } | |
640 | ||
641 | static int rose_dev_exists(rose_address *addr) | |
642 | { | |
643 | struct net_device *dev; | |
644 | ||
c6d14c84 ED |
645 | rcu_read_lock(); |
646 | for_each_netdev_rcu(&init_net, dev) { | |
1da177e4 LT |
647 | if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE && rosecmp(addr, (rose_address *)dev->dev_addr) == 0) |
648 | goto out; | |
649 | } | |
7562f876 | 650 | dev = NULL; |
1da177e4 | 651 | out: |
c6d14c84 | 652 | rcu_read_unlock(); |
1da177e4 LT |
653 | return dev != NULL; |
654 | } | |
655 | ||
656 | ||
657 | ||
658 | ||
659 | struct rose_route *rose_route_free_lci(unsigned int lci, struct rose_neigh *neigh) | |
660 | { | |
661 | struct rose_route *rose_route; | |
662 | ||
663 | for (rose_route = rose_route_list; rose_route != NULL; rose_route = rose_route->next) | |
664 | if ((rose_route->neigh1 == neigh && rose_route->lci1 == lci) || | |
665 | (rose_route->neigh2 == neigh && rose_route->lci2 == lci)) | |
666 | return rose_route; | |
667 | ||
668 | return NULL; | |
669 | } | |
670 | ||
671 | /* | |
fe2c802a | 672 | * Find a neighbour or a route given a ROSE address. |
1da177e4 LT |
673 | */ |
674 | struct rose_neigh *rose_get_neigh(rose_address *addr, unsigned char *cause, | |
c5d8b24a | 675 | unsigned char *diagnostic, int route_frame) |
1da177e4 LT |
676 | { |
677 | struct rose_neigh *res = NULL; | |
678 | struct rose_node *node; | |
679 | int failed = 0; | |
680 | int i; | |
681 | ||
c5d8b24a | 682 | if (!route_frame) spin_lock_bh(&rose_node_list_lock); |
1da177e4 LT |
683 | for (node = rose_node_list; node != NULL; node = node->next) { |
684 | if (rosecmpm(addr, &node->address, node->mask) == 0) { | |
685 | for (i = 0; i < node->count; i++) { | |
c5d8b24a BP |
686 | if (node->neighbour[i]->restarted) { |
687 | res = node->neighbour[i]; | |
688 | goto out; | |
fe2c802a | 689 | } |
c5d8b24a BP |
690 | } |
691 | } | |
692 | } | |
693 | if (!route_frame) { /* connect request */ | |
694 | for (node = rose_node_list; node != NULL; node = node->next) { | |
695 | if (rosecmpm(addr, &node->address, node->mask) == 0) { | |
696 | for (i = 0; i < node->count; i++) { | |
fe2c802a BP |
697 | if (!rose_ftimer_running(node->neighbour[i])) { |
698 | res = node->neighbour[i]; | |
699 | goto out; | |
c5d8b24a BP |
700 | } |
701 | failed = 1; | |
fe2c802a | 702 | } |
1da177e4 | 703 | } |
1da177e4 LT |
704 | } |
705 | } | |
706 | ||
707 | if (failed) { | |
708 | *cause = ROSE_OUT_OF_ORDER; | |
709 | *diagnostic = 0; | |
710 | } else { | |
711 | *cause = ROSE_NOT_OBTAINABLE; | |
712 | *diagnostic = 0; | |
713 | } | |
714 | ||
715 | out: | |
c5d8b24a | 716 | if (!route_frame) spin_unlock_bh(&rose_node_list_lock); |
1da177e4 LT |
717 | return res; |
718 | } | |
719 | ||
720 | /* | |
721 | * Handle the ioctls that control the routing functions. | |
722 | */ | |
723 | int rose_rt_ioctl(unsigned int cmd, void __user *arg) | |
724 | { | |
725 | struct rose_route_struct rose_route; | |
726 | struct net_device *dev; | |
727 | int err; | |
728 | ||
729 | switch (cmd) { | |
730 | case SIOCADDRT: | |
731 | if (copy_from_user(&rose_route, arg, sizeof(struct rose_route_struct))) | |
732 | return -EFAULT; | |
b4ec8240 | 733 | if ((dev = rose_ax25_dev_find(rose_route.device)) == NULL) |
1da177e4 | 734 | return -EINVAL; |
b4ec8240 | 735 | if (rose_dev_exists(&rose_route.address)) /* Can't add routes to ourself */ |
1da177e4 | 736 | return -EINVAL; |
1da177e4 LT |
737 | if (rose_route.mask > 10) /* Mask can't be more than 10 digits */ |
738 | return -EINVAL; | |
95df1c04 | 739 | if (rose_route.ndigis > AX25_MAX_DIGIS) |
1da177e4 LT |
740 | return -EINVAL; |
741 | err = rose_add_node(&rose_route, dev); | |
1da177e4 LT |
742 | return err; |
743 | ||
744 | case SIOCDELRT: | |
745 | if (copy_from_user(&rose_route, arg, sizeof(struct rose_route_struct))) | |
746 | return -EFAULT; | |
b4ec8240 | 747 | if ((dev = rose_ax25_dev_find(rose_route.device)) == NULL) |
1da177e4 LT |
748 | return -EINVAL; |
749 | err = rose_del_node(&rose_route, dev); | |
1da177e4 LT |
750 | return err; |
751 | ||
752 | case SIOCRSCLRRT: | |
753 | return rose_clear_routes(); | |
754 | ||
755 | default: | |
756 | return -EINVAL; | |
757 | } | |
758 | ||
759 | return 0; | |
760 | } | |
761 | ||
762 | static void rose_del_route_by_neigh(struct rose_neigh *rose_neigh) | |
763 | { | |
764 | struct rose_route *rose_route, *s; | |
765 | ||
766 | rose_neigh->restarted = 0; | |
767 | ||
768 | rose_stop_t0timer(rose_neigh); | |
769 | rose_start_ftimer(rose_neigh); | |
770 | ||
771 | skb_queue_purge(&rose_neigh->queue); | |
772 | ||
773 | spin_lock_bh(&rose_route_list_lock); | |
774 | ||
775 | rose_route = rose_route_list; | |
776 | ||
777 | while (rose_route != NULL) { | |
778 | if ((rose_route->neigh1 == rose_neigh && rose_route->neigh2 == rose_neigh) || | |
779 | (rose_route->neigh1 == rose_neigh && rose_route->neigh2 == NULL) || | |
780 | (rose_route->neigh2 == rose_neigh && rose_route->neigh1 == NULL)) { | |
781 | s = rose_route->next; | |
782 | rose_remove_route(rose_route); | |
783 | rose_route = s; | |
784 | continue; | |
785 | } | |
786 | ||
787 | if (rose_route->neigh1 == rose_neigh) { | |
788 | rose_route->neigh1->use--; | |
789 | rose_route->neigh1 = NULL; | |
790 | rose_transmit_clear_request(rose_route->neigh2, rose_route->lci2, ROSE_OUT_OF_ORDER, 0); | |
791 | } | |
792 | ||
793 | if (rose_route->neigh2 == rose_neigh) { | |
794 | rose_route->neigh2->use--; | |
795 | rose_route->neigh2 = NULL; | |
796 | rose_transmit_clear_request(rose_route->neigh1, rose_route->lci1, ROSE_OUT_OF_ORDER, 0); | |
797 | } | |
798 | ||
799 | rose_route = rose_route->next; | |
800 | } | |
801 | spin_unlock_bh(&rose_route_list_lock); | |
802 | } | |
803 | ||
804 | /* | |
805 | * A level 2 link has timed out, therefore it appears to be a poor link, | |
806 | * then don't use that neighbour until it is reset. Blow away all through | |
807 | * routes and connections using this route. | |
808 | */ | |
809 | void rose_link_failed(ax25_cb *ax25, int reason) | |
810 | { | |
811 | struct rose_neigh *rose_neigh; | |
812 | ||
813 | spin_lock_bh(&rose_neigh_list_lock); | |
814 | rose_neigh = rose_neigh_list; | |
815 | while (rose_neigh != NULL) { | |
816 | if (rose_neigh->ax25 == ax25) | |
817 | break; | |
818 | rose_neigh = rose_neigh->next; | |
819 | } | |
820 | ||
821 | if (rose_neigh != NULL) { | |
822 | rose_neigh->ax25 = NULL; | |
d00c362f | 823 | ax25_cb_put(ax25); |
1da177e4 LT |
824 | |
825 | rose_del_route_by_neigh(rose_neigh); | |
826 | rose_kill_by_neigh(rose_neigh); | |
827 | } | |
828 | spin_unlock_bh(&rose_neigh_list_lock); | |
829 | } | |
830 | ||
831 | /* | |
832 | * A device has been "downed" remove its link status. Blow away all | |
833 | * through routes and connections that use this device. | |
834 | */ | |
835 | void rose_link_device_down(struct net_device *dev) | |
836 | { | |
837 | struct rose_neigh *rose_neigh; | |
838 | ||
839 | for (rose_neigh = rose_neigh_list; rose_neigh != NULL; rose_neigh = rose_neigh->next) { | |
840 | if (rose_neigh->dev == dev) { | |
841 | rose_del_route_by_neigh(rose_neigh); | |
842 | rose_kill_by_neigh(rose_neigh); | |
843 | } | |
844 | } | |
845 | } | |
846 | ||
847 | /* | |
848 | * Route a frame to an appropriate AX.25 connection. | |
b0cf0292 | 849 | * A NULL ax25_cb indicates an internally generated frame. |
1da177e4 LT |
850 | */ |
851 | int rose_route_frame(struct sk_buff *skb, ax25_cb *ax25) | |
852 | { | |
853 | struct rose_neigh *rose_neigh, *new_neigh; | |
854 | struct rose_route *rose_route; | |
855 | struct rose_facilities_struct facilities; | |
856 | rose_address *src_addr, *dest_addr; | |
857 | struct sock *sk; | |
858 | unsigned short frametype; | |
859 | unsigned int lci, new_lci; | |
860 | unsigned char cause, diagnostic; | |
861 | struct net_device *dev; | |
e0bccd31 | 862 | int res = 0; |
f75268cd | 863 | char buf[11]; |
1da177e4 | 864 | |
e0bccd31 BH |
865 | if (skb->len < ROSE_MIN_LEN) |
866 | return res; | |
b0cf0292 BP |
867 | |
868 | if (!ax25) | |
869 | return rose_loopback_queue(skb, NULL); | |
870 | ||
1da177e4 LT |
871 | frametype = skb->data[2]; |
872 | lci = ((skb->data[0] << 8) & 0xF00) + ((skb->data[1] << 0) & 0x0FF); | |
e0bccd31 BH |
873 | if (frametype == ROSE_CALL_REQUEST && |
874 | (skb->len <= ROSE_CALL_REQ_FACILITIES_OFF || | |
875 | skb->data[ROSE_CALL_REQ_ADDR_LEN_OFF] != | |
876 | ROSE_CALL_REQ_ADDR_LEN_VAL)) | |
877 | return res; | |
878 | src_addr = (rose_address *)(skb->data + ROSE_CALL_REQ_SRC_ADDR_OFF); | |
879 | dest_addr = (rose_address *)(skb->data + ROSE_CALL_REQ_DEST_ADDR_OFF); | |
1da177e4 | 880 | |
1da177e4 LT |
881 | spin_lock_bh(&rose_neigh_list_lock); |
882 | spin_lock_bh(&rose_route_list_lock); | |
883 | ||
884 | rose_neigh = rose_neigh_list; | |
885 | while (rose_neigh != NULL) { | |
886 | if (ax25cmp(&ax25->dest_addr, &rose_neigh->callsign) == 0 && | |
887 | ax25->ax25_dev->dev == rose_neigh->dev) | |
888 | break; | |
889 | rose_neigh = rose_neigh->next; | |
890 | } | |
891 | ||
892 | if (rose_neigh == NULL) { | |
893 | printk("rose_route : unknown neighbour or device %s\n", | |
f75268cd | 894 | ax2asc(buf, &ax25->dest_addr)); |
1da177e4 LT |
895 | goto out; |
896 | } | |
897 | ||
898 | /* | |
899 | * Obviously the link is working, halt the ftimer. | |
900 | */ | |
901 | rose_stop_ftimer(rose_neigh); | |
902 | ||
903 | /* | |
904 | * LCI of zero is always for us, and its always a restart | |
905 | * frame. | |
906 | */ | |
907 | if (lci == 0) { | |
908 | rose_link_rx_restart(skb, rose_neigh, frametype); | |
909 | goto out; | |
910 | } | |
911 | ||
912 | /* | |
913 | * Find an existing socket. | |
914 | */ | |
915 | if ((sk = rose_find_socket(lci, rose_neigh)) != NULL) { | |
916 | if (frametype == ROSE_CALL_REQUEST) { | |
917 | struct rose_sock *rose = rose_sk(sk); | |
918 | ||
919 | /* Remove an existing unused socket */ | |
920 | rose_clear_queues(sk); | |
921 | rose->cause = ROSE_NETWORK_CONGESTION; | |
922 | rose->diagnostic = 0; | |
923 | rose->neighbour->use--; | |
924 | rose->neighbour = NULL; | |
925 | rose->lci = 0; | |
926 | rose->state = ROSE_STATE_0; | |
927 | sk->sk_state = TCP_CLOSE; | |
928 | sk->sk_err = 0; | |
929 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
930 | if (!sock_flag(sk, SOCK_DEAD)) { | |
931 | sk->sk_state_change(sk); | |
932 | sock_set_flag(sk, SOCK_DEAD); | |
933 | } | |
934 | } | |
935 | else { | |
badff6d0 | 936 | skb_reset_transport_header(skb); |
1da177e4 LT |
937 | res = rose_process_rx_frame(sk, skb); |
938 | goto out; | |
939 | } | |
940 | } | |
941 | ||
942 | /* | |
943 | * Is is a Call Request and is it for us ? | |
944 | */ | |
945 | if (frametype == ROSE_CALL_REQUEST) | |
946 | if ((dev = rose_dev_get(dest_addr)) != NULL) { | |
947 | res = rose_rx_call_request(skb, dev, rose_neigh, lci); | |
948 | dev_put(dev); | |
949 | goto out; | |
950 | } | |
951 | ||
952 | if (!sysctl_rose_routing_control) { | |
953 | rose_transmit_clear_request(rose_neigh, lci, ROSE_NOT_OBTAINABLE, 0); | |
954 | goto out; | |
955 | } | |
956 | ||
957 | /* | |
958 | * Route it to the next in line if we have an entry for it. | |
959 | */ | |
960 | rose_route = rose_route_list; | |
961 | while (rose_route != NULL) { | |
962 | if (rose_route->lci1 == lci && | |
963 | rose_route->neigh1 == rose_neigh) { | |
964 | if (frametype == ROSE_CALL_REQUEST) { | |
965 | /* F6FBB - Remove an existing unused route */ | |
966 | rose_remove_route(rose_route); | |
967 | break; | |
968 | } else if (rose_route->neigh2 != NULL) { | |
969 | skb->data[0] &= 0xF0; | |
970 | skb->data[0] |= (rose_route->lci2 >> 8) & 0x0F; | |
971 | skb->data[1] = (rose_route->lci2 >> 0) & 0xFF; | |
972 | rose_transmit_link(skb, rose_route->neigh2); | |
973 | if (frametype == ROSE_CLEAR_CONFIRMATION) | |
974 | rose_remove_route(rose_route); | |
975 | res = 1; | |
976 | goto out; | |
977 | } else { | |
978 | if (frametype == ROSE_CLEAR_CONFIRMATION) | |
979 | rose_remove_route(rose_route); | |
980 | goto out; | |
981 | } | |
982 | } | |
983 | if (rose_route->lci2 == lci && | |
984 | rose_route->neigh2 == rose_neigh) { | |
985 | if (frametype == ROSE_CALL_REQUEST) { | |
986 | /* F6FBB - Remove an existing unused route */ | |
987 | rose_remove_route(rose_route); | |
988 | break; | |
989 | } else if (rose_route->neigh1 != NULL) { | |
990 | skb->data[0] &= 0xF0; | |
991 | skb->data[0] |= (rose_route->lci1 >> 8) & 0x0F; | |
992 | skb->data[1] = (rose_route->lci1 >> 0) & 0xFF; | |
993 | rose_transmit_link(skb, rose_route->neigh1); | |
994 | if (frametype == ROSE_CLEAR_CONFIRMATION) | |
995 | rose_remove_route(rose_route); | |
996 | res = 1; | |
997 | goto out; | |
998 | } else { | |
999 | if (frametype == ROSE_CLEAR_CONFIRMATION) | |
1000 | rose_remove_route(rose_route); | |
1001 | goto out; | |
1002 | } | |
1003 | } | |
1004 | rose_route = rose_route->next; | |
1005 | } | |
1006 | ||
1007 | /* | |
1008 | * We know that: | |
1009 | * 1. The frame isn't for us, | |
1010 | * 2. It isn't "owned" by any existing route. | |
1011 | */ | |
dc16aaf2 | 1012 | if (frametype != ROSE_CALL_REQUEST) { /* XXX */ |
c1cc1684 | 1013 | res = 0; |
dc16aaf2 DM |
1014 | goto out; |
1015 | } | |
1da177e4 | 1016 | |
1da177e4 LT |
1017 | memset(&facilities, 0x00, sizeof(struct rose_facilities_struct)); |
1018 | ||
e0bccd31 BH |
1019 | if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF, |
1020 | skb->len - ROSE_CALL_REQ_FACILITIES_OFF, | |
1021 | &facilities)) { | |
1da177e4 LT |
1022 | rose_transmit_clear_request(rose_neigh, lci, ROSE_INVALID_FACILITY, 76); |
1023 | goto out; | |
1024 | } | |
1025 | ||
1026 | /* | |
1027 | * Check for routing loops. | |
1028 | */ | |
1029 | rose_route = rose_route_list; | |
1030 | while (rose_route != NULL) { | |
1031 | if (rose_route->rand == facilities.rand && | |
1032 | rosecmp(src_addr, &rose_route->src_addr) == 0 && | |
1033 | ax25cmp(&facilities.dest_call, &rose_route->src_call) == 0 && | |
1034 | ax25cmp(&facilities.source_call, &rose_route->dest_call) == 0) { | |
1035 | rose_transmit_clear_request(rose_neigh, lci, ROSE_NOT_OBTAINABLE, 120); | |
1036 | goto out; | |
1037 | } | |
1038 | rose_route = rose_route->next; | |
1039 | } | |
1040 | ||
fe2c802a | 1041 | if ((new_neigh = rose_get_neigh(dest_addr, &cause, &diagnostic, 1)) == NULL) { |
1da177e4 LT |
1042 | rose_transmit_clear_request(rose_neigh, lci, cause, diagnostic); |
1043 | goto out; | |
1044 | } | |
1045 | ||
1046 | if ((new_lci = rose_new_lci(new_neigh)) == 0) { | |
1047 | rose_transmit_clear_request(rose_neigh, lci, ROSE_NETWORK_CONGESTION, 71); | |
1048 | goto out; | |
1049 | } | |
1050 | ||
1051 | if ((rose_route = kmalloc(sizeof(*rose_route), GFP_ATOMIC)) == NULL) { | |
1052 | rose_transmit_clear_request(rose_neigh, lci, ROSE_NETWORK_CONGESTION, 120); | |
1053 | goto out; | |
1054 | } | |
1055 | ||
1056 | rose_route->lci1 = lci; | |
1057 | rose_route->src_addr = *src_addr; | |
1058 | rose_route->dest_addr = *dest_addr; | |
1059 | rose_route->src_call = facilities.dest_call; | |
1060 | rose_route->dest_call = facilities.source_call; | |
1061 | rose_route->rand = facilities.rand; | |
1062 | rose_route->neigh1 = rose_neigh; | |
1063 | rose_route->lci2 = new_lci; | |
1064 | rose_route->neigh2 = new_neigh; | |
1065 | ||
1066 | rose_route->neigh1->use++; | |
1067 | rose_route->neigh2->use++; | |
1068 | ||
1069 | rose_route->next = rose_route_list; | |
1070 | rose_route_list = rose_route; | |
1071 | ||
1072 | skb->data[0] &= 0xF0; | |
1073 | skb->data[0] |= (rose_route->lci2 >> 8) & 0x0F; | |
1074 | skb->data[1] = (rose_route->lci2 >> 0) & 0xFF; | |
1075 | ||
1076 | rose_transmit_link(skb, rose_route->neigh2); | |
1077 | res = 1; | |
1078 | ||
1079 | out: | |
1080 | spin_unlock_bh(&rose_route_list_lock); | |
1081 | spin_unlock_bh(&rose_neigh_list_lock); | |
1da177e4 LT |
1082 | |
1083 | return res; | |
1084 | } | |
1085 | ||
1086 | #ifdef CONFIG_PROC_FS | |
1087 | ||
1088 | static void *rose_node_start(struct seq_file *seq, loff_t *pos) | |
f37f2c62 | 1089 | __acquires(rose_node_list_lock) |
1da177e4 LT |
1090 | { |
1091 | struct rose_node *rose_node; | |
1092 | int i = 1; | |
1093 | ||
f37f2c62 | 1094 | spin_lock_bh(&rose_node_list_lock); |
1da177e4 LT |
1095 | if (*pos == 0) |
1096 | return SEQ_START_TOKEN; | |
1097 | ||
3dcf7c5e | 1098 | for (rose_node = rose_node_list; rose_node && i < *pos; |
1da177e4 LT |
1099 | rose_node = rose_node->next, ++i); |
1100 | ||
1101 | return (i == *pos) ? rose_node : NULL; | |
1102 | } | |
1103 | ||
1104 | static void *rose_node_next(struct seq_file *seq, void *v, loff_t *pos) | |
1105 | { | |
1106 | ++*pos; | |
3dcf7c5e YH |
1107 | |
1108 | return (v == SEQ_START_TOKEN) ? rose_node_list | |
1da177e4 LT |
1109 | : ((struct rose_node *)v)->next; |
1110 | } | |
1111 | ||
1112 | static void rose_node_stop(struct seq_file *seq, void *v) | |
f37f2c62 | 1113 | __releases(rose_node_list_lock) |
1da177e4 | 1114 | { |
f37f2c62 | 1115 | spin_unlock_bh(&rose_node_list_lock); |
1da177e4 LT |
1116 | } |
1117 | ||
1118 | static int rose_node_show(struct seq_file *seq, void *v) | |
1119 | { | |
dcf777f6 | 1120 | char rsbuf[11]; |
1da177e4 LT |
1121 | int i; |
1122 | ||
1123 | if (v == SEQ_START_TOKEN) | |
1124 | seq_puts(seq, "address mask n neigh neigh neigh\n"); | |
1125 | else { | |
1126 | const struct rose_node *rose_node = v; | |
1127 | /* if (rose_node->loopback) { | |
1128 | seq_printf(seq, "%-10s %04d 1 loopback\n", | |
dcf777f6 RB |
1129 | rose2asc(rsbuf, &rose_node->address), |
1130 | rose_node->mask); | |
1da177e4 LT |
1131 | } else { */ |
1132 | seq_printf(seq, "%-10s %04d %d", | |
dcf777f6 RB |
1133 | rose2asc(rsbuf, &rose_node->address), |
1134 | rose_node->mask, | |
1135 | rose_node->count); | |
1da177e4 LT |
1136 | |
1137 | for (i = 0; i < rose_node->count; i++) | |
1138 | seq_printf(seq, " %05d", | |
1139 | rose_node->neighbour[i]->number); | |
1140 | ||
1141 | seq_puts(seq, "\n"); | |
1142 | /* } */ | |
1143 | } | |
1144 | return 0; | |
1145 | } | |
1146 | ||
fddda2b7 | 1147 | const struct seq_operations rose_node_seqops = { |
1da177e4 LT |
1148 | .start = rose_node_start, |
1149 | .next = rose_node_next, | |
1150 | .stop = rose_node_stop, | |
1151 | .show = rose_node_show, | |
1152 | }; | |
1153 | ||
1da177e4 | 1154 | static void *rose_neigh_start(struct seq_file *seq, loff_t *pos) |
95b7d924 | 1155 | __acquires(rose_neigh_list_lock) |
1da177e4 LT |
1156 | { |
1157 | struct rose_neigh *rose_neigh; | |
1158 | int i = 1; | |
1159 | ||
1160 | spin_lock_bh(&rose_neigh_list_lock); | |
1161 | if (*pos == 0) | |
1162 | return SEQ_START_TOKEN; | |
1163 | ||
3dcf7c5e | 1164 | for (rose_neigh = rose_neigh_list; rose_neigh && i < *pos; |
1da177e4 LT |
1165 | rose_neigh = rose_neigh->next, ++i); |
1166 | ||
1167 | return (i == *pos) ? rose_neigh : NULL; | |
1168 | } | |
1169 | ||
1170 | static void *rose_neigh_next(struct seq_file *seq, void *v, loff_t *pos) | |
1171 | { | |
1172 | ++*pos; | |
3dcf7c5e YH |
1173 | |
1174 | return (v == SEQ_START_TOKEN) ? rose_neigh_list | |
1da177e4 LT |
1175 | : ((struct rose_neigh *)v)->next; |
1176 | } | |
1177 | ||
1178 | static void rose_neigh_stop(struct seq_file *seq, void *v) | |
95b7d924 | 1179 | __releases(rose_neigh_list_lock) |
1da177e4 LT |
1180 | { |
1181 | spin_unlock_bh(&rose_neigh_list_lock); | |
1182 | } | |
1183 | ||
1184 | static int rose_neigh_show(struct seq_file *seq, void *v) | |
1185 | { | |
f75268cd | 1186 | char buf[11]; |
1da177e4 LT |
1187 | int i; |
1188 | ||
1189 | if (v == SEQ_START_TOKEN) | |
3dcf7c5e | 1190 | seq_puts(seq, |
1da177e4 LT |
1191 | "addr callsign dev count use mode restart t0 tf digipeaters\n"); |
1192 | else { | |
1193 | struct rose_neigh *rose_neigh = v; | |
1194 | ||
1195 | /* if (!rose_neigh->loopback) { */ | |
1196 | seq_printf(seq, "%05d %-9s %-4s %3d %3d %3s %3s %3lu %3lu", | |
1197 | rose_neigh->number, | |
f75268cd | 1198 | (rose_neigh->loopback) ? "RSLOOP-0" : ax2asc(buf, &rose_neigh->callsign), |
1da177e4 LT |
1199 | rose_neigh->dev ? rose_neigh->dev->name : "???", |
1200 | rose_neigh->count, | |
1201 | rose_neigh->use, | |
1202 | (rose_neigh->dce_mode) ? "DCE" : "DTE", | |
1203 | (rose_neigh->restarted) ? "yes" : "no", | |
1204 | ax25_display_timer(&rose_neigh->t0timer) / HZ, | |
1205 | ax25_display_timer(&rose_neigh->ftimer) / HZ); | |
1206 | ||
1207 | if (rose_neigh->digipeat != NULL) { | |
1208 | for (i = 0; i < rose_neigh->digipeat->ndigi; i++) | |
f75268cd | 1209 | seq_printf(seq, " %s", ax2asc(buf, &rose_neigh->digipeat->calls[i])); |
1da177e4 LT |
1210 | } |
1211 | ||
1212 | seq_puts(seq, "\n"); | |
1213 | } | |
1214 | return 0; | |
1215 | } | |
1216 | ||
1217 | ||
fddda2b7 | 1218 | const struct seq_operations rose_neigh_seqops = { |
1da177e4 LT |
1219 | .start = rose_neigh_start, |
1220 | .next = rose_neigh_next, | |
1221 | .stop = rose_neigh_stop, | |
1222 | .show = rose_neigh_show, | |
1223 | }; | |
1224 | ||
1da177e4 | 1225 | static void *rose_route_start(struct seq_file *seq, loff_t *pos) |
95b7d924 | 1226 | __acquires(rose_route_list_lock) |
1da177e4 LT |
1227 | { |
1228 | struct rose_route *rose_route; | |
1229 | int i = 1; | |
1230 | ||
1231 | spin_lock_bh(&rose_route_list_lock); | |
1232 | if (*pos == 0) | |
1233 | return SEQ_START_TOKEN; | |
1234 | ||
3dcf7c5e | 1235 | for (rose_route = rose_route_list; rose_route && i < *pos; |
1da177e4 LT |
1236 | rose_route = rose_route->next, ++i); |
1237 | ||
1238 | return (i == *pos) ? rose_route : NULL; | |
1239 | } | |
1240 | ||
1241 | static void *rose_route_next(struct seq_file *seq, void *v, loff_t *pos) | |
1242 | { | |
1243 | ++*pos; | |
3dcf7c5e YH |
1244 | |
1245 | return (v == SEQ_START_TOKEN) ? rose_route_list | |
1da177e4 LT |
1246 | : ((struct rose_route *)v)->next; |
1247 | } | |
1248 | ||
1249 | static void rose_route_stop(struct seq_file *seq, void *v) | |
95b7d924 | 1250 | __releases(rose_route_list_lock) |
1da177e4 LT |
1251 | { |
1252 | spin_unlock_bh(&rose_route_list_lock); | |
1253 | } | |
1254 | ||
1255 | static int rose_route_show(struct seq_file *seq, void *v) | |
1256 | { | |
dcf777f6 | 1257 | char buf[11], rsbuf[11]; |
f75268cd | 1258 | |
1da177e4 | 1259 | if (v == SEQ_START_TOKEN) |
3dcf7c5e | 1260 | seq_puts(seq, |
1da177e4 LT |
1261 | "lci address callsign neigh <-> lci address callsign neigh\n"); |
1262 | else { | |
1263 | struct rose_route *rose_route = v; | |
1264 | ||
3dcf7c5e | 1265 | if (rose_route->neigh1) |
1da177e4 LT |
1266 | seq_printf(seq, |
1267 | "%3.3X %-10s %-9s %05d ", | |
1268 | rose_route->lci1, | |
dcf777f6 | 1269 | rose2asc(rsbuf, &rose_route->src_addr), |
f75268cd | 1270 | ax2asc(buf, &rose_route->src_call), |
1da177e4 | 1271 | rose_route->neigh1->number); |
3dcf7c5e YH |
1272 | else |
1273 | seq_puts(seq, | |
1da177e4 LT |
1274 | "000 * * 00000 "); |
1275 | ||
3dcf7c5e | 1276 | if (rose_route->neigh2) |
1da177e4 LT |
1277 | seq_printf(seq, |
1278 | "%3.3X %-10s %-9s %05d\n", | |
dcf777f6 RB |
1279 | rose_route->lci2, |
1280 | rose2asc(rsbuf, &rose_route->dest_addr), | |
1281 | ax2asc(buf, &rose_route->dest_call), | |
1282 | rose_route->neigh2->number); | |
3dcf7c5e | 1283 | else |
1da177e4 LT |
1284 | seq_puts(seq, |
1285 | "000 * * 00000\n"); | |
1286 | } | |
1287 | return 0; | |
1288 | } | |
1289 | ||
fddda2b7 | 1290 | struct seq_operations rose_route_seqops = { |
1da177e4 LT |
1291 | .start = rose_route_start, |
1292 | .next = rose_route_next, | |
1293 | .stop = rose_route_stop, | |
1294 | .show = rose_route_show, | |
1295 | }; | |
1da177e4 LT |
1296 | #endif /* CONFIG_PROC_FS */ |
1297 | ||
1298 | /* | |
1299 | * Release all memory associated with ROSE routing structures. | |
1300 | */ | |
1301 | void __exit rose_rt_free(void) | |
1302 | { | |
1303 | struct rose_neigh *s, *rose_neigh = rose_neigh_list; | |
1304 | struct rose_node *t, *rose_node = rose_node_list; | |
1305 | struct rose_route *u, *rose_route = rose_route_list; | |
1306 | ||
1307 | while (rose_neigh != NULL) { | |
1308 | s = rose_neigh; | |
1309 | rose_neigh = rose_neigh->next; | |
1310 | ||
1311 | rose_remove_neigh(s); | |
1312 | } | |
1313 | ||
1314 | while (rose_node != NULL) { | |
1315 | t = rose_node; | |
1316 | rose_node = rose_node->next; | |
1317 | ||
1318 | rose_remove_node(t); | |
1319 | } | |
1320 | ||
1321 | while (rose_route != NULL) { | |
1322 | u = rose_route; | |
1323 | rose_route = rose_route->next; | |
1324 | ||
1325 | rose_remove_route(u); | |
1326 | } | |
1327 | } |