1
2
3
4
5
6
7
8
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>
15#include <linux/timer.h>
16#include <linux/string.h>
17#include <linux/sockios.h>
18#include <linux/net.h>
19#include <linux/slab.h>
20#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>
27#include <net/tcp_states.h>
28#include <linux/uaccess.h>
29#include <linux/fcntl.h>
30#include <linux/termios.h>
31#include <linux/mm.h>
32#include <linux/interrupt.h>
33#include <linux/notifier.h>
34#include <linux/init.h>
35#include <net/rose.h>
36#include <linux/seq_file.h>
37#include <linux/export.h>
38
39static unsigned int rose_neigh_no = 1;
40
41static struct rose_node *rose_node_list;
42static DEFINE_SPINLOCK(rose_node_list_lock);
43static struct rose_neigh *rose_neigh_list;
44static DEFINE_SPINLOCK(rose_neigh_list_lock);
45static struct rose_route *rose_route_list;
46static DEFINE_SPINLOCK(rose_route_list_lock);
47
48struct rose_neigh *rose_loopback_neigh;
49
50
51
52
53
54static int __must_check rose_add_node(struct rose_route_struct *rose_route,
55 struct net_device *dev)
56{
57 struct rose_node *rose_node, *rose_tmpn, *rose_tmpp;
58 struct rose_neigh *rose_neigh;
59 int i, res = 0;
60
61 spin_lock_bh(&rose_node_list_lock);
62 spin_lock_bh(&rose_neigh_list_lock);
63
64 rose_node = rose_node_list;
65 while (rose_node != NULL) {
66 if ((rose_node->mask == rose_route->mask) &&
67 (rosecmpm(&rose_route->address, &rose_node->address,
68 rose_route->mask) == 0))
69 break;
70 rose_node = rose_node->next;
71 }
72
73 if (rose_node != NULL && rose_node->loopback) {
74 res = -EINVAL;
75 goto out;
76 }
77
78 rose_neigh = rose_neigh_list;
79 while (rose_neigh != NULL) {
80 if (ax25cmp(&rose_route->neighbour,
81 &rose_neigh->callsign) == 0 &&
82 rose_neigh->dev == dev)
83 break;
84 rose_neigh = rose_neigh->next;
85 }
86
87 if (rose_neigh == NULL) {
88 rose_neigh = kmalloc(sizeof(*rose_neigh), GFP_ATOMIC);
89 if (rose_neigh == NULL) {
90 res = -ENOMEM;
91 goto out;
92 }
93
94 rose_neigh->callsign = rose_route->neighbour;
95 rose_neigh->digipeat = NULL;
96 rose_neigh->ax25 = NULL;
97 rose_neigh->dev = dev;
98 rose_neigh->count = 0;
99 rose_neigh->use = 0;
100 rose_neigh->dce_mode = 0;
101 rose_neigh->loopback = 0;
102 rose_neigh->number = rose_neigh_no++;
103 rose_neigh->restarted = 0;
104
105 skb_queue_head_init(&rose_neigh->queue);
106
107 timer_setup(&rose_neigh->ftimer, NULL, 0);
108 timer_setup(&rose_neigh->t0timer, NULL, 0);
109
110 if (rose_route->ndigis != 0) {
111 rose_neigh->digipeat =
112 kmalloc(sizeof(ax25_digi), GFP_ATOMIC);
113 if (rose_neigh->digipeat == NULL) {
114 kfree(rose_neigh);
115 res = -ENOMEM;
116 goto out;
117 }
118
119 rose_neigh->digipeat->ndigi = rose_route->ndigis;
120 rose_neigh->digipeat->lastrepeat = -1;
121
122 for (i = 0; i < rose_route->ndigis; i++) {
123 rose_neigh->digipeat->calls[i] =
124 rose_route->digipeaters[i];
125 rose_neigh->digipeat->repeated[i] = 0;
126 }
127 }
128
129 rose_neigh->next = rose_neigh_list;
130 rose_neigh_list = rose_neigh;
131 }
132
133
134
135
136
137
138
139
140 if (rose_node == NULL) {
141 rose_tmpn = rose_node_list;
142 rose_tmpp = NULL;
143
144 while (rose_tmpn != NULL) {
145 if (rose_tmpn->mask > rose_route->mask) {
146 rose_tmpp = rose_tmpn;
147 rose_tmpn = rose_tmpn->next;
148 } else {
149 break;
150 }
151 }
152
153
154 rose_node = kmalloc(sizeof(*rose_node), GFP_ATOMIC);
155 if (rose_node == NULL) {
156 res = -ENOMEM;
157 goto out;
158 }
159
160 rose_node->address = rose_route->address;
161 rose_node->mask = rose_route->mask;
162 rose_node->count = 1;
163 rose_node->loopback = 0;
164 rose_node->neighbour[0] = rose_neigh;
165
166 if (rose_tmpn == NULL) {
167 if (rose_tmpp == NULL) {
168 rose_node_list = rose_node;
169 rose_node->next = NULL;
170 } else {
171 rose_tmpp->next = rose_node;
172 rose_node->next = NULL;
173 }
174 } else {
175 if (rose_tmpp == NULL) {
176 rose_node->next = rose_node_list;
177 rose_node_list = rose_node;
178 } else {
179 rose_tmpp->next = rose_node;
180 rose_node->next = rose_tmpn;
181 }
182 }
183 rose_neigh->count++;
184
185 goto out;
186 }
187
188
189 if (rose_node->count < 3) {
190 rose_node->neighbour[rose_node->count] = rose_neigh;
191 rose_node->count++;
192 rose_neigh->count++;
193 }
194
195out:
196 spin_unlock_bh(&rose_neigh_list_lock);
197 spin_unlock_bh(&rose_node_list_lock);
198
199 return res;
200}
201
202
203
204
205static void rose_remove_node(struct rose_node *rose_node)
206{
207 struct rose_node *s;
208
209 if ((s = rose_node_list) == rose_node) {
210 rose_node_list = rose_node->next;
211 kfree(rose_node);
212 return;
213 }
214
215 while (s != NULL && s->next != NULL) {
216 if (s->next == rose_node) {
217 s->next = rose_node->next;
218 kfree(rose_node);
219 return;
220 }
221
222 s = s->next;
223 }
224}
225
226
227
228
229static void rose_remove_neigh(struct rose_neigh *rose_neigh)
230{
231 struct rose_neigh *s;
232
233 rose_stop_ftimer(rose_neigh);
234 rose_stop_t0timer(rose_neigh);
235
236 skb_queue_purge(&rose_neigh->queue);
237
238 if ((s = rose_neigh_list) == rose_neigh) {
239 rose_neigh_list = rose_neigh->next;
240 if (rose_neigh->ax25)
241 ax25_cb_put(rose_neigh->ax25);
242 kfree(rose_neigh->digipeat);
243 kfree(rose_neigh);
244 return;
245 }
246
247 while (s != NULL && s->next != NULL) {
248 if (s->next == rose_neigh) {
249 s->next = rose_neigh->next;
250 if (rose_neigh->ax25)
251 ax25_cb_put(rose_neigh->ax25);
252 kfree(rose_neigh->digipeat);
253 kfree(rose_neigh);
254 return;
255 }
256
257 s = s->next;
258 }
259}
260
261
262
263
264static void rose_remove_route(struct rose_route *rose_route)
265{
266 struct rose_route *s;
267
268 if (rose_route->neigh1 != NULL)
269 rose_route->neigh1->use--;
270
271 if (rose_route->neigh2 != NULL)
272 rose_route->neigh2->use--;
273
274 if ((s = rose_route_list) == rose_route) {
275 rose_route_list = rose_route->next;
276 kfree(rose_route);
277 return;
278 }
279
280 while (s != NULL && s->next != NULL) {
281 if (s->next == rose_route) {
282 s->next = rose_route->next;
283 kfree(rose_route);
284 return;
285 }
286
287 s = s->next;
288 }
289}
290
291
292
293
294
295static int rose_del_node(struct rose_route_struct *rose_route,
296 struct net_device *dev)
297{
298 struct rose_node *rose_node;
299 struct rose_neigh *rose_neigh;
300 int i, err = 0;
301
302 spin_lock_bh(&rose_node_list_lock);
303 spin_lock_bh(&rose_neigh_list_lock);
304
305 rose_node = rose_node_list;
306 while (rose_node != NULL) {
307 if ((rose_node->mask == rose_route->mask) &&
308 (rosecmpm(&rose_route->address, &rose_node->address,
309 rose_route->mask) == 0))
310 break;
311 rose_node = rose_node->next;
312 }
313
314 if (rose_node == NULL || rose_node->loopback) {
315 err = -EINVAL;
316 goto out;
317 }
318
319 rose_neigh = rose_neigh_list;
320 while (rose_neigh != NULL) {
321 if (ax25cmp(&rose_route->neighbour,
322 &rose_neigh->callsign) == 0 &&
323 rose_neigh->dev == dev)
324 break;
325 rose_neigh = rose_neigh->next;
326 }
327
328 if (rose_neigh == NULL) {
329 err = -EINVAL;
330 goto out;
331 }
332
333 for (i = 0; i < rose_node->count; i++) {
334 if (rose_node->neighbour[i] == rose_neigh) {
335 rose_neigh->count--;
336
337 if (rose_neigh->count == 0 && rose_neigh->use == 0)
338 rose_remove_neigh(rose_neigh);
339
340 rose_node->count--;
341
342 if (rose_node->count == 0) {
343 rose_remove_node(rose_node);
344 } else {
345 switch (i) {
346 case 0:
347 rose_node->neighbour[0] =
348 rose_node->neighbour[1];
349
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
371
372void rose_add_loopback_neigh(void)
373{
374 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;
380
381 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;
391
392 skb_queue_head_init(&sn->queue);
393
394 timer_setup(&sn->ftimer, NULL, 0);
395 timer_setup(&sn->t0timer, NULL, 0);
396
397 spin_lock_bh(&rose_neigh_list_lock);
398 sn->next = rose_neigh_list;
399 rose_neigh_list = sn;
400 spin_unlock_bh(&rose_neigh_list_lock);
401}
402
403
404
405
406int rose_add_loopback_node(rose_address *address)
407{
408 struct rose_node *rose_node;
409 int err = 0;
410
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;
434 rose_node->neighbour[0] = rose_loopback_neigh;
435
436
437 rose_node->next = rose_node_list;
438 rose_node_list = rose_node;
439
440 rose_loopback_neigh->count++;
441
442out:
443 spin_unlock_bh(&rose_node_list_lock);
444
445 return err;
446}
447
448
449
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
471 rose_loopback_neigh->count--;
472
473out:
474 spin_unlock_bh(&rose_node_list_lock);
475}
476
477
478
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
512 case 1:
513 t->neighbour[1] = t->neighbour[2];
514 case 2:
515 break;
516 }
517 }
518
519 if (t->count <= 0)
520 rose_remove_node(t);
521 }
522
523 rose_remove_neigh(s);
524 }
525 spin_unlock_bh(&rose_neigh_list_lock);
526 spin_unlock_bh(&rose_node_list_lock);
527}
528
529#if 0
530
531
532
533void rose_route_device_down(struct net_device *dev)
534{
535 struct rose_route *s, *rose_route;
536
537 spin_lock_bh(&rose_route_list_lock);
538 rose_route = rose_route_list;
539 while (rose_route != NULL) {
540 s = rose_route;
541 rose_route = rose_route->next;
542
543 if (s->neigh1->dev == dev || s->neigh2->dev == dev)
544 rose_remove_route(s);
545 }
546 spin_unlock_bh(&rose_route_list_lock);
547}
548#endif
549
550
551
552
553
554
555static int rose_clear_routes(void)
556{
557 struct rose_neigh *s, *rose_neigh;
558 struct rose_node *t, *rose_node;
559
560 spin_lock_bh(&rose_node_list_lock);
561 spin_lock_bh(&rose_neigh_list_lock);
562
563 rose_neigh = rose_neigh_list;
564 rose_node = rose_node_list;
565
566 while (rose_node != NULL) {
567 t = rose_node;
568 rose_node = rose_node->next;
569 if (!t->loopback)
570 rose_remove_node(t);
571 }
572
573 while (rose_neigh != NULL) {
574 s = rose_neigh;
575 rose_neigh = rose_neigh->next;
576
577 if (s->use == 0 && !s->loopback) {
578 s->count = 0;
579 rose_remove_neigh(s);
580 }
581 }
582
583 spin_unlock_bh(&rose_neigh_list_lock);
584 spin_unlock_bh(&rose_node_list_lock);
585
586 return 0;
587}
588
589
590
591
592
593static struct net_device *rose_ax25_dev_find(char *devname)
594{
595 struct net_device *dev;
596
597 if ((dev = __dev_get_by_name(&init_net, devname)) == NULL)
598 return NULL;
599
600 if ((dev->flags & IFF_UP) && dev->type == ARPHRD_AX25)
601 return dev;
602
603 return NULL;
604}
605
606
607
608
609struct net_device *rose_dev_first(void)
610{
611 struct net_device *dev, *first = NULL;
612
613 rcu_read_lock();
614 for_each_netdev_rcu(&init_net, dev) {
615 if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE)
616 if (first == NULL || strncmp(dev->name, first->name, 3) < 0)
617 first = dev;
618 }
619 rcu_read_unlock();
620
621 return first;
622}
623
624
625
626
627struct net_device *rose_dev_get(rose_address *addr)
628{
629 struct net_device *dev;
630
631 rcu_read_lock();
632 for_each_netdev_rcu(&init_net, dev) {
633 if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE && rosecmp(addr, (rose_address *)dev->dev_addr) == 0) {
634 dev_hold(dev);
635 goto out;
636 }
637 }
638 dev = NULL;
639out:
640 rcu_read_unlock();
641 return dev;
642}
643
644static int rose_dev_exists(rose_address *addr)
645{
646 struct net_device *dev;
647
648 rcu_read_lock();
649 for_each_netdev_rcu(&init_net, dev) {
650 if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE && rosecmp(addr, (rose_address *)dev->dev_addr) == 0)
651 goto out;
652 }
653 dev = NULL;
654out:
655 rcu_read_unlock();
656 return dev != NULL;
657}
658
659
660
661
662struct rose_route *rose_route_free_lci(unsigned int lci, struct rose_neigh *neigh)
663{
664 struct rose_route *rose_route;
665
666 for (rose_route = rose_route_list; rose_route != NULL; rose_route = rose_route->next)
667 if ((rose_route->neigh1 == neigh && rose_route->lci1 == lci) ||
668 (rose_route->neigh2 == neigh && rose_route->lci2 == lci))
669 return rose_route;
670
671 return NULL;
672}
673
674
675
676
677struct rose_neigh *rose_get_neigh(rose_address *addr, unsigned char *cause,
678 unsigned char *diagnostic, int route_frame)
679{
680 struct rose_neigh *res = NULL;
681 struct rose_node *node;
682 int failed = 0;
683 int i;
684
685 if (!route_frame) spin_lock_bh(&rose_node_list_lock);
686 for (node = rose_node_list; node != NULL; node = node->next) {
687 if (rosecmpm(addr, &node->address, node->mask) == 0) {
688 for (i = 0; i < node->count; i++) {
689 if (node->neighbour[i]->restarted) {
690 res = node->neighbour[i];
691 goto out;
692 }
693 }
694 }
695 }
696 if (!route_frame) {
697 for (node = rose_node_list; node != NULL; node = node->next) {
698 if (rosecmpm(addr, &node->address, node->mask) == 0) {
699 for (i = 0; i < node->count; i++) {
700 if (!rose_ftimer_running(node->neighbour[i])) {
701 res = node->neighbour[i];
702 failed = 0;
703 goto out;
704 }
705 failed = 1;
706 }
707 }
708 }
709 }
710
711 if (failed) {
712 *cause = ROSE_OUT_OF_ORDER;
713 *diagnostic = 0;
714 } else {
715 *cause = ROSE_NOT_OBTAINABLE;
716 *diagnostic = 0;
717 }
718
719out:
720 if (!route_frame) spin_unlock_bh(&rose_node_list_lock);
721 return res;
722}
723
724
725
726
727int rose_rt_ioctl(unsigned int cmd, void __user *arg)
728{
729 struct rose_route_struct rose_route;
730 struct net_device *dev;
731 int err;
732
733 switch (cmd) {
734 case SIOCADDRT:
735 if (copy_from_user(&rose_route, arg, sizeof(struct rose_route_struct)))
736 return -EFAULT;
737 if ((dev = rose_ax25_dev_find(rose_route.device)) == NULL)
738 return -EINVAL;
739 if (rose_dev_exists(&rose_route.address))
740 return -EINVAL;
741 if (rose_route.mask > 10)
742 return -EINVAL;
743 if (rose_route.ndigis > AX25_MAX_DIGIS)
744 return -EINVAL;
745 err = rose_add_node(&rose_route, dev);
746 return err;
747
748 case SIOCDELRT:
749 if (copy_from_user(&rose_route, arg, sizeof(struct rose_route_struct)))
750 return -EFAULT;
751 if ((dev = rose_ax25_dev_find(rose_route.device)) == NULL)
752 return -EINVAL;
753 err = rose_del_node(&rose_route, dev);
754 return err;
755
756 case SIOCRSCLRRT:
757 return rose_clear_routes();
758
759 default:
760 return -EINVAL;
761 }
762
763 return 0;
764}
765
766static void rose_del_route_by_neigh(struct rose_neigh *rose_neigh)
767{
768 struct rose_route *rose_route, *s;
769
770 rose_neigh->restarted = 0;
771
772 rose_stop_t0timer(rose_neigh);
773 rose_start_ftimer(rose_neigh);
774
775 skb_queue_purge(&rose_neigh->queue);
776
777 spin_lock_bh(&rose_route_list_lock);
778
779 rose_route = rose_route_list;
780
781 while (rose_route != NULL) {
782 if ((rose_route->neigh1 == rose_neigh && rose_route->neigh2 == rose_neigh) ||
783 (rose_route->neigh1 == rose_neigh && rose_route->neigh2 == NULL) ||
784 (rose_route->neigh2 == rose_neigh && rose_route->neigh1 == NULL)) {
785 s = rose_route->next;
786 rose_remove_route(rose_route);
787 rose_route = s;
788 continue;
789 }
790
791 if (rose_route->neigh1 == rose_neigh) {
792 rose_route->neigh1->use--;
793 rose_route->neigh1 = NULL;
794 rose_transmit_clear_request(rose_route->neigh2, rose_route->lci2, ROSE_OUT_OF_ORDER, 0);
795 }
796
797 if (rose_route->neigh2 == rose_neigh) {
798 rose_route->neigh2->use--;
799 rose_route->neigh2 = NULL;
800 rose_transmit_clear_request(rose_route->neigh1, rose_route->lci1, ROSE_OUT_OF_ORDER, 0);
801 }
802
803 rose_route = rose_route->next;
804 }
805 spin_unlock_bh(&rose_route_list_lock);
806}
807
808
809
810
811
812
813void rose_link_failed(ax25_cb *ax25, int reason)
814{
815 struct rose_neigh *rose_neigh;
816
817 spin_lock_bh(&rose_neigh_list_lock);
818 rose_neigh = rose_neigh_list;
819 while (rose_neigh != NULL) {
820 if (rose_neigh->ax25 == ax25)
821 break;
822 rose_neigh = rose_neigh->next;
823 }
824
825 if (rose_neigh != NULL) {
826 rose_neigh->ax25 = NULL;
827 ax25_cb_put(ax25);
828
829 rose_del_route_by_neigh(rose_neigh);
830 rose_kill_by_neigh(rose_neigh);
831 }
832 spin_unlock_bh(&rose_neigh_list_lock);
833}
834
835
836
837
838
839void rose_link_device_down(struct net_device *dev)
840{
841 struct rose_neigh *rose_neigh;
842
843 for (rose_neigh = rose_neigh_list; rose_neigh != NULL; rose_neigh = rose_neigh->next) {
844 if (rose_neigh->dev == dev) {
845 rose_del_route_by_neigh(rose_neigh);
846 rose_kill_by_neigh(rose_neigh);
847 }
848 }
849}
850
851
852
853
854int rose_route_frame(struct sk_buff *skb, ax25_cb *ax25)
855{
856 struct rose_neigh *rose_neigh, *new_neigh;
857 struct rose_route *rose_route;
858 struct rose_facilities_struct facilities;
859 rose_address *src_addr, *dest_addr;
860 struct sock *sk;
861 unsigned short frametype;
862 unsigned int lci, new_lci;
863 unsigned char cause, diagnostic;
864 struct net_device *dev;
865 int res = 0;
866 char buf[11];
867
868 if (skb->len < ROSE_MIN_LEN)
869 return res;
870 frametype = skb->data[2];
871 lci = ((skb->data[0] << 8) & 0xF00) + ((skb->data[1] << 0) & 0x0FF);
872 if (frametype == ROSE_CALL_REQUEST &&
873 (skb->len <= ROSE_CALL_REQ_FACILITIES_OFF ||
874 skb->data[ROSE_CALL_REQ_ADDR_LEN_OFF] !=
875 ROSE_CALL_REQ_ADDR_LEN_VAL))
876 return res;
877 src_addr = (rose_address *)(skb->data + ROSE_CALL_REQ_SRC_ADDR_OFF);
878 dest_addr = (rose_address *)(skb->data + ROSE_CALL_REQ_DEST_ADDR_OFF);
879
880 spin_lock_bh(&rose_neigh_list_lock);
881 spin_lock_bh(&rose_route_list_lock);
882
883 rose_neigh = rose_neigh_list;
884 while (rose_neigh != NULL) {
885 if (ax25cmp(&ax25->dest_addr, &rose_neigh->callsign) == 0 &&
886 ax25->ax25_dev->dev == rose_neigh->dev)
887 break;
888 rose_neigh = rose_neigh->next;
889 }
890
891 if (rose_neigh == NULL) {
892 printk("rose_route : unknown neighbour or device %s\n",
893 ax2asc(buf, &ax25->dest_addr));
894 goto out;
895 }
896
897
898
899
900 rose_stop_ftimer(rose_neigh);
901
902
903
904
905
906 if (lci == 0) {
907 rose_link_rx_restart(skb, rose_neigh, frametype);
908 goto out;
909 }
910
911
912
913
914 if ((sk = rose_find_socket(lci, rose_neigh)) != NULL) {
915 if (frametype == ROSE_CALL_REQUEST) {
916 struct rose_sock *rose = rose_sk(sk);
917
918
919 rose_clear_queues(sk);
920 rose->cause = ROSE_NETWORK_CONGESTION;
921 rose->diagnostic = 0;
922 rose->neighbour->use--;
923 rose->neighbour = NULL;
924 rose->lci = 0;
925 rose->state = ROSE_STATE_0;
926 sk->sk_state = TCP_CLOSE;
927 sk->sk_err = 0;
928 sk->sk_shutdown |= SEND_SHUTDOWN;
929 if (!sock_flag(sk, SOCK_DEAD)) {
930 sk->sk_state_change(sk);
931 sock_set_flag(sk, SOCK_DEAD);
932 }
933 }
934 else {
935 skb_reset_transport_header(skb);
936 res = rose_process_rx_frame(sk, skb);
937 goto out;
938 }
939 }
940
941
942
943
944 if (frametype == ROSE_CALL_REQUEST)
945 if ((dev = rose_dev_get(dest_addr)) != NULL) {
946 res = rose_rx_call_request(skb, dev, rose_neigh, lci);
947 dev_put(dev);
948 goto out;
949 }
950
951 if (!sysctl_rose_routing_control) {
952 rose_transmit_clear_request(rose_neigh, lci, ROSE_NOT_OBTAINABLE, 0);
953 goto out;
954 }
955
956
957
958
959 rose_route = rose_route_list;
960 while (rose_route != NULL) {
961 if (rose_route->lci1 == lci &&
962 rose_route->neigh1 == rose_neigh) {
963 if (frametype == ROSE_CALL_REQUEST) {
964
965 rose_remove_route(rose_route);
966 break;
967 } else if (rose_route->neigh2 != NULL) {
968 skb->data[0] &= 0xF0;
969 skb->data[0] |= (rose_route->lci2 >> 8) & 0x0F;
970 skb->data[1] = (rose_route->lci2 >> 0) & 0xFF;
971 rose_transmit_link(skb, rose_route->neigh2);
972 if (frametype == ROSE_CLEAR_CONFIRMATION)
973 rose_remove_route(rose_route);
974 res = 1;
975 goto out;
976 } else {
977 if (frametype == ROSE_CLEAR_CONFIRMATION)
978 rose_remove_route(rose_route);
979 goto out;
980 }
981 }
982 if (rose_route->lci2 == lci &&
983 rose_route->neigh2 == rose_neigh) {
984 if (frametype == ROSE_CALL_REQUEST) {
985
986 rose_remove_route(rose_route);
987 break;
988 } else if (rose_route->neigh1 != NULL) {
989 skb->data[0] &= 0xF0;
990 skb->data[0] |= (rose_route->lci1 >> 8) & 0x0F;
991 skb->data[1] = (rose_route->lci1 >> 0) & 0xFF;
992 rose_transmit_link(skb, rose_route->neigh1);
993 if (frametype == ROSE_CLEAR_CONFIRMATION)
994 rose_remove_route(rose_route);
995 res = 1;
996 goto out;
997 } else {
998 if (frametype == ROSE_CLEAR_CONFIRMATION)
999 rose_remove_route(rose_route);
1000 goto out;
1001 }
1002 }
1003 rose_route = rose_route->next;
1004 }
1005
1006
1007
1008
1009
1010
1011 if (frametype != ROSE_CALL_REQUEST) {
1012 res = 0;
1013 goto out;
1014 }
1015
1016 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
1017
1018 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
1019 skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
1020 &facilities)) {
1021 rose_transmit_clear_request(rose_neigh, lci, ROSE_INVALID_FACILITY, 76);
1022 goto out;
1023 }
1024
1025
1026
1027
1028 rose_route = rose_route_list;
1029 while (rose_route != NULL) {
1030 if (rose_route->rand == facilities.rand &&
1031 rosecmp(src_addr, &rose_route->src_addr) == 0 &&
1032 ax25cmp(&facilities.dest_call, &rose_route->src_call) == 0 &&
1033 ax25cmp(&facilities.source_call, &rose_route->dest_call) == 0) {
1034 rose_transmit_clear_request(rose_neigh, lci, ROSE_NOT_OBTAINABLE, 120);
1035 goto out;
1036 }
1037 rose_route = rose_route->next;
1038 }
1039
1040 if ((new_neigh = rose_get_neigh(dest_addr, &cause, &diagnostic, 1)) == NULL) {
1041 rose_transmit_clear_request(rose_neigh, lci, cause, diagnostic);
1042 goto out;
1043 }
1044
1045 if ((new_lci = rose_new_lci(new_neigh)) == 0) {
1046 rose_transmit_clear_request(rose_neigh, lci, ROSE_NETWORK_CONGESTION, 71);
1047 goto out;
1048 }
1049
1050 if ((rose_route = kmalloc(sizeof(*rose_route), GFP_ATOMIC)) == NULL) {
1051 rose_transmit_clear_request(rose_neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1052 goto out;
1053 }
1054
1055 rose_route->lci1 = lci;
1056 rose_route->src_addr = *src_addr;
1057 rose_route->dest_addr = *dest_addr;
1058 rose_route->src_call = facilities.dest_call;
1059 rose_route->dest_call = facilities.source_call;
1060 rose_route->rand = facilities.rand;
1061 rose_route->neigh1 = rose_neigh;
1062 rose_route->lci2 = new_lci;
1063 rose_route->neigh2 = new_neigh;
1064
1065 rose_route->neigh1->use++;
1066 rose_route->neigh2->use++;
1067
1068 rose_route->next = rose_route_list;
1069 rose_route_list = rose_route;
1070
1071 skb->data[0] &= 0xF0;
1072 skb->data[0] |= (rose_route->lci2 >> 8) & 0x0F;
1073 skb->data[1] = (rose_route->lci2 >> 0) & 0xFF;
1074
1075 rose_transmit_link(skb, rose_route->neigh2);
1076 res = 1;
1077
1078out:
1079 spin_unlock_bh(&rose_route_list_lock);
1080 spin_unlock_bh(&rose_neigh_list_lock);
1081
1082 return res;
1083}
1084
1085#ifdef CONFIG_PROC_FS
1086
1087static void *rose_node_start(struct seq_file *seq, loff_t *pos)
1088 __acquires(rose_node_list_lock)
1089{
1090 struct rose_node *rose_node;
1091 int i = 1;
1092
1093 spin_lock_bh(&rose_node_list_lock);
1094 if (*pos == 0)
1095 return SEQ_START_TOKEN;
1096
1097 for (rose_node = rose_node_list; rose_node && i < *pos;
1098 rose_node = rose_node->next, ++i);
1099
1100 return (i == *pos) ? rose_node : NULL;
1101}
1102
1103static void *rose_node_next(struct seq_file *seq, void *v, loff_t *pos)
1104{
1105 ++*pos;
1106
1107 return (v == SEQ_START_TOKEN) ? rose_node_list
1108 : ((struct rose_node *)v)->next;
1109}
1110
1111static void rose_node_stop(struct seq_file *seq, void *v)
1112 __releases(rose_node_list_lock)
1113{
1114 spin_unlock_bh(&rose_node_list_lock);
1115}
1116
1117static int rose_node_show(struct seq_file *seq, void *v)
1118{
1119 char rsbuf[11];
1120 int i;
1121
1122 if (v == SEQ_START_TOKEN)
1123 seq_puts(seq, "address mask n neigh neigh neigh\n");
1124 else {
1125 const struct rose_node *rose_node = v;
1126
1127
1128
1129
1130
1131 seq_printf(seq, "%-10s %04d %d",
1132 rose2asc(rsbuf, &rose_node->address),
1133 rose_node->mask,
1134 rose_node->count);
1135
1136 for (i = 0; i < rose_node->count; i++)
1137 seq_printf(seq, " %05d",
1138 rose_node->neighbour[i]->number);
1139
1140 seq_puts(seq, "\n");
1141
1142 }
1143 return 0;
1144}
1145
1146static const struct seq_operations rose_node_seqops = {
1147 .start = rose_node_start,
1148 .next = rose_node_next,
1149 .stop = rose_node_stop,
1150 .show = rose_node_show,
1151};
1152
1153static int rose_nodes_open(struct inode *inode, struct file *file)
1154{
1155 return seq_open(file, &rose_node_seqops);
1156}
1157
1158const struct file_operations rose_nodes_fops = {
1159 .owner = THIS_MODULE,
1160 .open = rose_nodes_open,
1161 .read = seq_read,
1162 .llseek = seq_lseek,
1163 .release = seq_release,
1164};
1165
1166static void *rose_neigh_start(struct seq_file *seq, loff_t *pos)
1167 __acquires(rose_neigh_list_lock)
1168{
1169 struct rose_neigh *rose_neigh;
1170 int i = 1;
1171
1172 spin_lock_bh(&rose_neigh_list_lock);
1173 if (*pos == 0)
1174 return SEQ_START_TOKEN;
1175
1176 for (rose_neigh = rose_neigh_list; rose_neigh && i < *pos;
1177 rose_neigh = rose_neigh->next, ++i);
1178
1179 return (i == *pos) ? rose_neigh : NULL;
1180}
1181
1182static void *rose_neigh_next(struct seq_file *seq, void *v, loff_t *pos)
1183{
1184 ++*pos;
1185
1186 return (v == SEQ_START_TOKEN) ? rose_neigh_list
1187 : ((struct rose_neigh *)v)->next;
1188}
1189
1190static void rose_neigh_stop(struct seq_file *seq, void *v)
1191 __releases(rose_neigh_list_lock)
1192{
1193 spin_unlock_bh(&rose_neigh_list_lock);
1194}
1195
1196static int rose_neigh_show(struct seq_file *seq, void *v)
1197{
1198 char buf[11];
1199 int i;
1200
1201 if (v == SEQ_START_TOKEN)
1202 seq_puts(seq,
1203 "addr callsign dev count use mode restart t0 tf digipeaters\n");
1204 else {
1205 struct rose_neigh *rose_neigh = v;
1206
1207
1208 seq_printf(seq, "%05d %-9s %-4s %3d %3d %3s %3s %3lu %3lu",
1209 rose_neigh->number,
1210 (rose_neigh->loopback) ? "RSLOOP-0" : ax2asc(buf, &rose_neigh->callsign),
1211 rose_neigh->dev ? rose_neigh->dev->name : "???",
1212 rose_neigh->count,
1213 rose_neigh->use,
1214 (rose_neigh->dce_mode) ? "DCE" : "DTE",
1215 (rose_neigh->restarted) ? "yes" : "no",
1216 ax25_display_timer(&rose_neigh->t0timer) / HZ,
1217 ax25_display_timer(&rose_neigh->ftimer) / HZ);
1218
1219 if (rose_neigh->digipeat != NULL) {
1220 for (i = 0; i < rose_neigh->digipeat->ndigi; i++)
1221 seq_printf(seq, " %s", ax2asc(buf, &rose_neigh->digipeat->calls[i]));
1222 }
1223
1224 seq_puts(seq, "\n");
1225 }
1226 return 0;
1227}
1228
1229
1230static const struct seq_operations rose_neigh_seqops = {
1231 .start = rose_neigh_start,
1232 .next = rose_neigh_next,
1233 .stop = rose_neigh_stop,
1234 .show = rose_neigh_show,
1235};
1236
1237static int rose_neigh_open(struct inode *inode, struct file *file)
1238{
1239 return seq_open(file, &rose_neigh_seqops);
1240}
1241
1242const struct file_operations rose_neigh_fops = {
1243 .owner = THIS_MODULE,
1244 .open = rose_neigh_open,
1245 .read = seq_read,
1246 .llseek = seq_lseek,
1247 .release = seq_release,
1248};
1249
1250
1251static void *rose_route_start(struct seq_file *seq, loff_t *pos)
1252 __acquires(rose_route_list_lock)
1253{
1254 struct rose_route *rose_route;
1255 int i = 1;
1256
1257 spin_lock_bh(&rose_route_list_lock);
1258 if (*pos == 0)
1259 return SEQ_START_TOKEN;
1260
1261 for (rose_route = rose_route_list; rose_route && i < *pos;
1262 rose_route = rose_route->next, ++i);
1263
1264 return (i == *pos) ? rose_route : NULL;
1265}
1266
1267static void *rose_route_next(struct seq_file *seq, void *v, loff_t *pos)
1268{
1269 ++*pos;
1270
1271 return (v == SEQ_START_TOKEN) ? rose_route_list
1272 : ((struct rose_route *)v)->next;
1273}
1274
1275static void rose_route_stop(struct seq_file *seq, void *v)
1276 __releases(rose_route_list_lock)
1277{
1278 spin_unlock_bh(&rose_route_list_lock);
1279}
1280
1281static int rose_route_show(struct seq_file *seq, void *v)
1282{
1283 char buf[11], rsbuf[11];
1284
1285 if (v == SEQ_START_TOKEN)
1286 seq_puts(seq,
1287 "lci address callsign neigh <-> lci address callsign neigh\n");
1288 else {
1289 struct rose_route *rose_route = v;
1290
1291 if (rose_route->neigh1)
1292 seq_printf(seq,
1293 "%3.3X %-10s %-9s %05d ",
1294 rose_route->lci1,
1295 rose2asc(rsbuf, &rose_route->src_addr),
1296 ax2asc(buf, &rose_route->src_call),
1297 rose_route->neigh1->number);
1298 else
1299 seq_puts(seq,
1300 "000 * * 00000 ");
1301
1302 if (rose_route->neigh2)
1303 seq_printf(seq,
1304 "%3.3X %-10s %-9s %05d\n",
1305 rose_route->lci2,
1306 rose2asc(rsbuf, &rose_route->dest_addr),
1307 ax2asc(buf, &rose_route->dest_call),
1308 rose_route->neigh2->number);
1309 else
1310 seq_puts(seq,
1311 "000 * * 00000\n");
1312 }
1313 return 0;
1314}
1315
1316static const struct seq_operations rose_route_seqops = {
1317 .start = rose_route_start,
1318 .next = rose_route_next,
1319 .stop = rose_route_stop,
1320 .show = rose_route_show,
1321};
1322
1323static int rose_route_open(struct inode *inode, struct file *file)
1324{
1325 return seq_open(file, &rose_route_seqops);
1326}
1327
1328const struct file_operations rose_routes_fops = {
1329 .owner = THIS_MODULE,
1330 .open = rose_route_open,
1331 .read = seq_read,
1332 .llseek = seq_lseek,
1333 .release = seq_release,
1334};
1335
1336#endif
1337
1338
1339
1340
1341void __exit rose_rt_free(void)
1342{
1343 struct rose_neigh *s, *rose_neigh = rose_neigh_list;
1344 struct rose_node *t, *rose_node = rose_node_list;
1345 struct rose_route *u, *rose_route = rose_route_list;
1346
1347 while (rose_neigh != NULL) {
1348 s = rose_neigh;
1349 rose_neigh = rose_neigh->next;
1350
1351 rose_remove_neigh(s);
1352 }
1353
1354 while (rose_node != NULL) {
1355 t = rose_node;
1356 rose_node = rose_node->next;
1357
1358 rose_remove_node(t);
1359 }
1360
1361 while (rose_route != NULL) {
1362 u = rose_route;
1363 rose_route = rose_route->next;
1364
1365 rose_remove_route(u);
1366 }
1367}
1368
