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[mirror_ubuntu-bionic-kernel.git] / net / rose / af_rose.c
1 /*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
8 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
9 * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
10 * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
11 */
12
13 #include <linux/capability.h>
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/init.h>
17 #include <linux/errno.h>
18 #include <linux/types.h>
19 #include <linux/socket.h>
20 #include <linux/in.h>
21 #include <linux/slab.h>
22 #include <linux/kernel.h>
23 #include <linux/sched/signal.h>
24 #include <linux/spinlock.h>
25 #include <linux/timer.h>
26 #include <linux/string.h>
27 #include <linux/sockios.h>
28 #include <linux/net.h>
29 #include <linux/stat.h>
30 #include <net/net_namespace.h>
31 #include <net/ax25.h>
32 #include <linux/inet.h>
33 #include <linux/netdevice.h>
34 #include <linux/if_arp.h>
35 #include <linux/skbuff.h>
36 #include <net/sock.h>
37 #include <linux/uaccess.h>
38 #include <linux/fcntl.h>
39 #include <linux/termios.h>
40 #include <linux/mm.h>
41 #include <linux/interrupt.h>
42 #include <linux/notifier.h>
43 #include <net/rose.h>
44 #include <linux/proc_fs.h>
45 #include <linux/seq_file.h>
46 #include <net/tcp_states.h>
47 #include <net/ip.h>
48 #include <net/arp.h>
49
50 static int rose_ndevs = 10;
51
52 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
53 int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
54 int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
55 int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
56 int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
57 int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
58 int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
59 int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
60 int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
61 int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
62
63 static HLIST_HEAD(rose_list);
64 static DEFINE_SPINLOCK(rose_list_lock);
65
66 static const struct proto_ops rose_proto_ops;
67
68 ax25_address rose_callsign;
69
70 /*
71 * ROSE network devices are virtual network devices encapsulating ROSE
72 * frames into AX.25 which will be sent through an AX.25 device, so form a
73 * special "super class" of normal net devices; split their locks off into a
74 * separate class since they always nest.
75 */
76 static struct lock_class_key rose_netdev_xmit_lock_key;
77 static struct lock_class_key rose_netdev_addr_lock_key;
78
79 static void rose_set_lockdep_one(struct net_device *dev,
80 struct netdev_queue *txq,
81 void *_unused)
82 {
83 lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
84 }
85
86 static void rose_set_lockdep_key(struct net_device *dev)
87 {
88 lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
89 netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
90 }
91
92 /*
93 * Convert a ROSE address into text.
94 */
95 char *rose2asc(char *buf, const rose_address *addr)
96 {
97 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
98 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
99 addr->rose_addr[4] == 0x00) {
100 strcpy(buf, "*");
101 } else {
102 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
103 addr->rose_addr[1] & 0xFF,
104 addr->rose_addr[2] & 0xFF,
105 addr->rose_addr[3] & 0xFF,
106 addr->rose_addr[4] & 0xFF);
107 }
108
109 return buf;
110 }
111
112 /*
113 * Compare two ROSE addresses, 0 == equal.
114 */
115 int rosecmp(rose_address *addr1, rose_address *addr2)
116 {
117 int i;
118
119 for (i = 0; i < 5; i++)
120 if (addr1->rose_addr[i] != addr2->rose_addr[i])
121 return 1;
122
123 return 0;
124 }
125
126 /*
127 * Compare two ROSE addresses for only mask digits, 0 == equal.
128 */
129 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
130 {
131 unsigned int i, j;
132
133 if (mask > 10)
134 return 1;
135
136 for (i = 0; i < mask; i++) {
137 j = i / 2;
138
139 if ((i % 2) != 0) {
140 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
141 return 1;
142 } else {
143 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
144 return 1;
145 }
146 }
147
148 return 0;
149 }
150
151 /*
152 * Socket removal during an interrupt is now safe.
153 */
154 static void rose_remove_socket(struct sock *sk)
155 {
156 spin_lock_bh(&rose_list_lock);
157 sk_del_node_init(sk);
158 spin_unlock_bh(&rose_list_lock);
159 }
160
161 /*
162 * Kill all bound sockets on a broken link layer connection to a
163 * particular neighbour.
164 */
165 void rose_kill_by_neigh(struct rose_neigh *neigh)
166 {
167 struct sock *s;
168
169 spin_lock_bh(&rose_list_lock);
170 sk_for_each(s, &rose_list) {
171 struct rose_sock *rose = rose_sk(s);
172
173 if (rose->neighbour == neigh) {
174 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
175 rose->neighbour->use--;
176 rose->neighbour = NULL;
177 }
178 }
179 spin_unlock_bh(&rose_list_lock);
180 }
181
182 /*
183 * Kill all bound sockets on a dropped device.
184 */
185 static void rose_kill_by_device(struct net_device *dev)
186 {
187 struct sock *s;
188
189 spin_lock_bh(&rose_list_lock);
190 sk_for_each(s, &rose_list) {
191 struct rose_sock *rose = rose_sk(s);
192
193 if (rose->device == dev) {
194 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
195 if (rose->neighbour)
196 rose->neighbour->use--;
197 rose->device = NULL;
198 }
199 }
200 spin_unlock_bh(&rose_list_lock);
201 }
202
203 /*
204 * Handle device status changes.
205 */
206 static int rose_device_event(struct notifier_block *this,
207 unsigned long event, void *ptr)
208 {
209 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
210
211 if (!net_eq(dev_net(dev), &init_net))
212 return NOTIFY_DONE;
213
214 if (event != NETDEV_DOWN)
215 return NOTIFY_DONE;
216
217 switch (dev->type) {
218 case ARPHRD_ROSE:
219 rose_kill_by_device(dev);
220 break;
221 case ARPHRD_AX25:
222 rose_link_device_down(dev);
223 rose_rt_device_down(dev);
224 break;
225 }
226
227 return NOTIFY_DONE;
228 }
229
230 /*
231 * Add a socket to the bound sockets list.
232 */
233 static void rose_insert_socket(struct sock *sk)
234 {
235
236 spin_lock_bh(&rose_list_lock);
237 sk_add_node(sk, &rose_list);
238 spin_unlock_bh(&rose_list_lock);
239 }
240
241 /*
242 * Find a socket that wants to accept the Call Request we just
243 * received.
244 */
245 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
246 {
247 struct sock *s;
248
249 spin_lock_bh(&rose_list_lock);
250 sk_for_each(s, &rose_list) {
251 struct rose_sock *rose = rose_sk(s);
252
253 if (!rosecmp(&rose->source_addr, addr) &&
254 !ax25cmp(&rose->source_call, call) &&
255 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
256 goto found;
257 }
258
259 sk_for_each(s, &rose_list) {
260 struct rose_sock *rose = rose_sk(s);
261
262 if (!rosecmp(&rose->source_addr, addr) &&
263 !ax25cmp(&rose->source_call, &null_ax25_address) &&
264 s->sk_state == TCP_LISTEN)
265 goto found;
266 }
267 s = NULL;
268 found:
269 spin_unlock_bh(&rose_list_lock);
270 return s;
271 }
272
273 /*
274 * Find a connected ROSE socket given my LCI and device.
275 */
276 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
277 {
278 struct sock *s;
279
280 spin_lock_bh(&rose_list_lock);
281 sk_for_each(s, &rose_list) {
282 struct rose_sock *rose = rose_sk(s);
283
284 if (rose->lci == lci && rose->neighbour == neigh)
285 goto found;
286 }
287 s = NULL;
288 found:
289 spin_unlock_bh(&rose_list_lock);
290 return s;
291 }
292
293 /*
294 * Find a unique LCI for a given device.
295 */
296 unsigned int rose_new_lci(struct rose_neigh *neigh)
297 {
298 int lci;
299
300 if (neigh->dce_mode) {
301 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
302 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
303 return lci;
304 } else {
305 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
306 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
307 return lci;
308 }
309
310 return 0;
311 }
312
313 /*
314 * Deferred destroy.
315 */
316 void rose_destroy_socket(struct sock *);
317
318 /*
319 * Handler for deferred kills.
320 */
321 static void rose_destroy_timer(unsigned long data)
322 {
323 rose_destroy_socket((struct sock *)data);
324 }
325
326 /*
327 * This is called from user mode and the timers. Thus it protects itself
328 * against interrupt users but doesn't worry about being called during
329 * work. Once it is removed from the queue no interrupt or bottom half
330 * will touch it and we are (fairly 8-) ) safe.
331 */
332 void rose_destroy_socket(struct sock *sk)
333 {
334 struct sk_buff *skb;
335
336 rose_remove_socket(sk);
337 rose_stop_heartbeat(sk);
338 rose_stop_idletimer(sk);
339 rose_stop_timer(sk);
340
341 rose_clear_queues(sk); /* Flush the queues */
342
343 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
344 if (skb->sk != sk) { /* A pending connection */
345 /* Queue the unaccepted socket for death */
346 sock_set_flag(skb->sk, SOCK_DEAD);
347 rose_start_heartbeat(skb->sk);
348 rose_sk(skb->sk)->state = ROSE_STATE_0;
349 }
350
351 kfree_skb(skb);
352 }
353
354 if (sk_has_allocations(sk)) {
355 /* Defer: outstanding buffers */
356 setup_timer(&sk->sk_timer, rose_destroy_timer,
357 (unsigned long)sk);
358 sk->sk_timer.expires = jiffies + 10 * HZ;
359 add_timer(&sk->sk_timer);
360 } else
361 sock_put(sk);
362 }
363
364 /*
365 * Handling for system calls applied via the various interfaces to a
366 * ROSE socket object.
367 */
368
369 static int rose_setsockopt(struct socket *sock, int level, int optname,
370 char __user *optval, unsigned int optlen)
371 {
372 struct sock *sk = sock->sk;
373 struct rose_sock *rose = rose_sk(sk);
374 int opt;
375
376 if (level != SOL_ROSE)
377 return -ENOPROTOOPT;
378
379 if (optlen < sizeof(int))
380 return -EINVAL;
381
382 if (get_user(opt, (int __user *)optval))
383 return -EFAULT;
384
385 switch (optname) {
386 case ROSE_DEFER:
387 rose->defer = opt ? 1 : 0;
388 return 0;
389
390 case ROSE_T1:
391 if (opt < 1)
392 return -EINVAL;
393 rose->t1 = opt * HZ;
394 return 0;
395
396 case ROSE_T2:
397 if (opt < 1)
398 return -EINVAL;
399 rose->t2 = opt * HZ;
400 return 0;
401
402 case ROSE_T3:
403 if (opt < 1)
404 return -EINVAL;
405 rose->t3 = opt * HZ;
406 return 0;
407
408 case ROSE_HOLDBACK:
409 if (opt < 1)
410 return -EINVAL;
411 rose->hb = opt * HZ;
412 return 0;
413
414 case ROSE_IDLE:
415 if (opt < 0)
416 return -EINVAL;
417 rose->idle = opt * 60 * HZ;
418 return 0;
419
420 case ROSE_QBITINCL:
421 rose->qbitincl = opt ? 1 : 0;
422 return 0;
423
424 default:
425 return -ENOPROTOOPT;
426 }
427 }
428
429 static int rose_getsockopt(struct socket *sock, int level, int optname,
430 char __user *optval, int __user *optlen)
431 {
432 struct sock *sk = sock->sk;
433 struct rose_sock *rose = rose_sk(sk);
434 int val = 0;
435 int len;
436
437 if (level != SOL_ROSE)
438 return -ENOPROTOOPT;
439
440 if (get_user(len, optlen))
441 return -EFAULT;
442
443 if (len < 0)
444 return -EINVAL;
445
446 switch (optname) {
447 case ROSE_DEFER:
448 val = rose->defer;
449 break;
450
451 case ROSE_T1:
452 val = rose->t1 / HZ;
453 break;
454
455 case ROSE_T2:
456 val = rose->t2 / HZ;
457 break;
458
459 case ROSE_T3:
460 val = rose->t3 / HZ;
461 break;
462
463 case ROSE_HOLDBACK:
464 val = rose->hb / HZ;
465 break;
466
467 case ROSE_IDLE:
468 val = rose->idle / (60 * HZ);
469 break;
470
471 case ROSE_QBITINCL:
472 val = rose->qbitincl;
473 break;
474
475 default:
476 return -ENOPROTOOPT;
477 }
478
479 len = min_t(unsigned int, len, sizeof(int));
480
481 if (put_user(len, optlen))
482 return -EFAULT;
483
484 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
485 }
486
487 static int rose_listen(struct socket *sock, int backlog)
488 {
489 struct sock *sk = sock->sk;
490
491 if (sk->sk_state != TCP_LISTEN) {
492 struct rose_sock *rose = rose_sk(sk);
493
494 rose->dest_ndigis = 0;
495 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
496 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
497 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
498 sk->sk_max_ack_backlog = backlog;
499 sk->sk_state = TCP_LISTEN;
500 return 0;
501 }
502
503 return -EOPNOTSUPP;
504 }
505
506 static struct proto rose_proto = {
507 .name = "ROSE",
508 .owner = THIS_MODULE,
509 .obj_size = sizeof(struct rose_sock),
510 };
511
512 static int rose_create(struct net *net, struct socket *sock, int protocol,
513 int kern)
514 {
515 struct sock *sk;
516 struct rose_sock *rose;
517
518 if (!net_eq(net, &init_net))
519 return -EAFNOSUPPORT;
520
521 if (sock->type != SOCK_SEQPACKET || protocol != 0)
522 return -ESOCKTNOSUPPORT;
523
524 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
525 if (sk == NULL)
526 return -ENOMEM;
527
528 rose = rose_sk(sk);
529
530 sock_init_data(sock, sk);
531
532 skb_queue_head_init(&rose->ack_queue);
533 #ifdef M_BIT
534 skb_queue_head_init(&rose->frag_queue);
535 rose->fraglen = 0;
536 #endif
537
538 sock->ops = &rose_proto_ops;
539 sk->sk_protocol = protocol;
540
541 init_timer(&rose->timer);
542 init_timer(&rose->idletimer);
543
544 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
545 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
546 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
547 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
548 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
549
550 rose->state = ROSE_STATE_0;
551
552 return 0;
553 }
554
555 static struct sock *rose_make_new(struct sock *osk)
556 {
557 struct sock *sk;
558 struct rose_sock *rose, *orose;
559
560 if (osk->sk_type != SOCK_SEQPACKET)
561 return NULL;
562
563 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
564 if (sk == NULL)
565 return NULL;
566
567 rose = rose_sk(sk);
568
569 sock_init_data(NULL, sk);
570
571 skb_queue_head_init(&rose->ack_queue);
572 #ifdef M_BIT
573 skb_queue_head_init(&rose->frag_queue);
574 rose->fraglen = 0;
575 #endif
576
577 sk->sk_type = osk->sk_type;
578 sk->sk_priority = osk->sk_priority;
579 sk->sk_protocol = osk->sk_protocol;
580 sk->sk_rcvbuf = osk->sk_rcvbuf;
581 sk->sk_sndbuf = osk->sk_sndbuf;
582 sk->sk_state = TCP_ESTABLISHED;
583 sock_copy_flags(sk, osk);
584
585 init_timer(&rose->timer);
586 init_timer(&rose->idletimer);
587
588 orose = rose_sk(osk);
589 rose->t1 = orose->t1;
590 rose->t2 = orose->t2;
591 rose->t3 = orose->t3;
592 rose->hb = orose->hb;
593 rose->idle = orose->idle;
594 rose->defer = orose->defer;
595 rose->device = orose->device;
596 rose->qbitincl = orose->qbitincl;
597
598 return sk;
599 }
600
601 static int rose_release(struct socket *sock)
602 {
603 struct sock *sk = sock->sk;
604 struct rose_sock *rose;
605
606 if (sk == NULL) return 0;
607
608 sock_hold(sk);
609 sock_orphan(sk);
610 lock_sock(sk);
611 rose = rose_sk(sk);
612
613 switch (rose->state) {
614 case ROSE_STATE_0:
615 release_sock(sk);
616 rose_disconnect(sk, 0, -1, -1);
617 lock_sock(sk);
618 rose_destroy_socket(sk);
619 break;
620
621 case ROSE_STATE_2:
622 rose->neighbour->use--;
623 release_sock(sk);
624 rose_disconnect(sk, 0, -1, -1);
625 lock_sock(sk);
626 rose_destroy_socket(sk);
627 break;
628
629 case ROSE_STATE_1:
630 case ROSE_STATE_3:
631 case ROSE_STATE_4:
632 case ROSE_STATE_5:
633 rose_clear_queues(sk);
634 rose_stop_idletimer(sk);
635 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
636 rose_start_t3timer(sk);
637 rose->state = ROSE_STATE_2;
638 sk->sk_state = TCP_CLOSE;
639 sk->sk_shutdown |= SEND_SHUTDOWN;
640 sk->sk_state_change(sk);
641 sock_set_flag(sk, SOCK_DEAD);
642 sock_set_flag(sk, SOCK_DESTROY);
643 break;
644
645 default:
646 break;
647 }
648
649 sock->sk = NULL;
650 release_sock(sk);
651 sock_put(sk);
652
653 return 0;
654 }
655
656 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
657 {
658 struct sock *sk = sock->sk;
659 struct rose_sock *rose = rose_sk(sk);
660 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
661 struct net_device *dev;
662 ax25_address *source;
663 ax25_uid_assoc *user;
664 int n;
665
666 if (!sock_flag(sk, SOCK_ZAPPED))
667 return -EINVAL;
668
669 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
670 return -EINVAL;
671
672 if (addr->srose_family != AF_ROSE)
673 return -EINVAL;
674
675 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
676 return -EINVAL;
677
678 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
679 return -EINVAL;
680
681 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
682 return -EADDRNOTAVAIL;
683
684 source = &addr->srose_call;
685
686 user = ax25_findbyuid(current_euid());
687 if (user) {
688 rose->source_call = user->call;
689 ax25_uid_put(user);
690 } else {
691 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
692 return -EACCES;
693 rose->source_call = *source;
694 }
695
696 rose->source_addr = addr->srose_addr;
697 rose->device = dev;
698 rose->source_ndigis = addr->srose_ndigis;
699
700 if (addr_len == sizeof(struct full_sockaddr_rose)) {
701 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
702 for (n = 0 ; n < addr->srose_ndigis ; n++)
703 rose->source_digis[n] = full_addr->srose_digis[n];
704 } else {
705 if (rose->source_ndigis == 1) {
706 rose->source_digis[0] = addr->srose_digi;
707 }
708 }
709
710 rose_insert_socket(sk);
711
712 sock_reset_flag(sk, SOCK_ZAPPED);
713
714 return 0;
715 }
716
717 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
718 {
719 struct sock *sk = sock->sk;
720 struct rose_sock *rose = rose_sk(sk);
721 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
722 unsigned char cause, diagnostic;
723 struct net_device *dev;
724 ax25_uid_assoc *user;
725 int n, err = 0;
726
727 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
728 return -EINVAL;
729
730 if (addr->srose_family != AF_ROSE)
731 return -EINVAL;
732
733 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
734 return -EINVAL;
735
736 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
737 return -EINVAL;
738
739 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
740 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
741 return -EINVAL;
742
743 lock_sock(sk);
744
745 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
746 /* Connect completed during a ERESTARTSYS event */
747 sock->state = SS_CONNECTED;
748 goto out_release;
749 }
750
751 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
752 sock->state = SS_UNCONNECTED;
753 err = -ECONNREFUSED;
754 goto out_release;
755 }
756
757 if (sk->sk_state == TCP_ESTABLISHED) {
758 /* No reconnect on a seqpacket socket */
759 err = -EISCONN;
760 goto out_release;
761 }
762
763 sk->sk_state = TCP_CLOSE;
764 sock->state = SS_UNCONNECTED;
765
766 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
767 &diagnostic, 0);
768 if (!rose->neighbour) {
769 err = -ENETUNREACH;
770 goto out_release;
771 }
772
773 rose->lci = rose_new_lci(rose->neighbour);
774 if (!rose->lci) {
775 err = -ENETUNREACH;
776 goto out_release;
777 }
778
779 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
780 sock_reset_flag(sk, SOCK_ZAPPED);
781
782 if ((dev = rose_dev_first()) == NULL) {
783 err = -ENETUNREACH;
784 goto out_release;
785 }
786
787 user = ax25_findbyuid(current_euid());
788 if (!user) {
789 err = -EINVAL;
790 goto out_release;
791 }
792
793 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
794 rose->source_call = user->call;
795 rose->device = dev;
796 ax25_uid_put(user);
797
798 rose_insert_socket(sk); /* Finish the bind */
799 }
800 rose->dest_addr = addr->srose_addr;
801 rose->dest_call = addr->srose_call;
802 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
803 rose->dest_ndigis = addr->srose_ndigis;
804
805 if (addr_len == sizeof(struct full_sockaddr_rose)) {
806 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
807 for (n = 0 ; n < addr->srose_ndigis ; n++)
808 rose->dest_digis[n] = full_addr->srose_digis[n];
809 } else {
810 if (rose->dest_ndigis == 1) {
811 rose->dest_digis[0] = addr->srose_digi;
812 }
813 }
814
815 /* Move to connecting socket, start sending Connect Requests */
816 sock->state = SS_CONNECTING;
817 sk->sk_state = TCP_SYN_SENT;
818
819 rose->state = ROSE_STATE_1;
820
821 rose->neighbour->use++;
822
823 rose_write_internal(sk, ROSE_CALL_REQUEST);
824 rose_start_heartbeat(sk);
825 rose_start_t1timer(sk);
826
827 /* Now the loop */
828 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
829 err = -EINPROGRESS;
830 goto out_release;
831 }
832
833 /*
834 * A Connect Ack with Choke or timeout or failed routing will go to
835 * closed.
836 */
837 if (sk->sk_state == TCP_SYN_SENT) {
838 DEFINE_WAIT(wait);
839
840 for (;;) {
841 prepare_to_wait(sk_sleep(sk), &wait,
842 TASK_INTERRUPTIBLE);
843 if (sk->sk_state != TCP_SYN_SENT)
844 break;
845 if (!signal_pending(current)) {
846 release_sock(sk);
847 schedule();
848 lock_sock(sk);
849 continue;
850 }
851 err = -ERESTARTSYS;
852 break;
853 }
854 finish_wait(sk_sleep(sk), &wait);
855
856 if (err)
857 goto out_release;
858 }
859
860 if (sk->sk_state != TCP_ESTABLISHED) {
861 sock->state = SS_UNCONNECTED;
862 err = sock_error(sk); /* Always set at this point */
863 goto out_release;
864 }
865
866 sock->state = SS_CONNECTED;
867
868 out_release:
869 release_sock(sk);
870
871 return err;
872 }
873
874 static int rose_accept(struct socket *sock, struct socket *newsock, int flags,
875 bool kern)
876 {
877 struct sk_buff *skb;
878 struct sock *newsk;
879 DEFINE_WAIT(wait);
880 struct sock *sk;
881 int err = 0;
882
883 if ((sk = sock->sk) == NULL)
884 return -EINVAL;
885
886 lock_sock(sk);
887 if (sk->sk_type != SOCK_SEQPACKET) {
888 err = -EOPNOTSUPP;
889 goto out_release;
890 }
891
892 if (sk->sk_state != TCP_LISTEN) {
893 err = -EINVAL;
894 goto out_release;
895 }
896
897 /*
898 * The write queue this time is holding sockets ready to use
899 * hooked into the SABM we saved
900 */
901 for (;;) {
902 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
903
904 skb = skb_dequeue(&sk->sk_receive_queue);
905 if (skb)
906 break;
907
908 if (flags & O_NONBLOCK) {
909 err = -EWOULDBLOCK;
910 break;
911 }
912 if (!signal_pending(current)) {
913 release_sock(sk);
914 schedule();
915 lock_sock(sk);
916 continue;
917 }
918 err = -ERESTARTSYS;
919 break;
920 }
921 finish_wait(sk_sleep(sk), &wait);
922 if (err)
923 goto out_release;
924
925 newsk = skb->sk;
926 sock_graft(newsk, newsock);
927
928 /* Now attach up the new socket */
929 skb->sk = NULL;
930 kfree_skb(skb);
931 sk->sk_ack_backlog--;
932
933 out_release:
934 release_sock(sk);
935
936 return err;
937 }
938
939 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
940 int *uaddr_len, int peer)
941 {
942 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
943 struct sock *sk = sock->sk;
944 struct rose_sock *rose = rose_sk(sk);
945 int n;
946
947 memset(srose, 0, sizeof(*srose));
948 if (peer != 0) {
949 if (sk->sk_state != TCP_ESTABLISHED)
950 return -ENOTCONN;
951 srose->srose_family = AF_ROSE;
952 srose->srose_addr = rose->dest_addr;
953 srose->srose_call = rose->dest_call;
954 srose->srose_ndigis = rose->dest_ndigis;
955 for (n = 0; n < rose->dest_ndigis; n++)
956 srose->srose_digis[n] = rose->dest_digis[n];
957 } else {
958 srose->srose_family = AF_ROSE;
959 srose->srose_addr = rose->source_addr;
960 srose->srose_call = rose->source_call;
961 srose->srose_ndigis = rose->source_ndigis;
962 for (n = 0; n < rose->source_ndigis; n++)
963 srose->srose_digis[n] = rose->source_digis[n];
964 }
965
966 *uaddr_len = sizeof(struct full_sockaddr_rose);
967 return 0;
968 }
969
970 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
971 {
972 struct sock *sk;
973 struct sock *make;
974 struct rose_sock *make_rose;
975 struct rose_facilities_struct facilities;
976 int n;
977
978 skb->sk = NULL; /* Initially we don't know who it's for */
979
980 /*
981 * skb->data points to the rose frame start
982 */
983 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
984
985 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
986 skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
987 &facilities)) {
988 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
989 return 0;
990 }
991
992 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
993
994 /*
995 * We can't accept the Call Request.
996 */
997 if (sk == NULL || sk_acceptq_is_full(sk) ||
998 (make = rose_make_new(sk)) == NULL) {
999 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1000 return 0;
1001 }
1002
1003 skb->sk = make;
1004 make->sk_state = TCP_ESTABLISHED;
1005 make_rose = rose_sk(make);
1006
1007 make_rose->lci = lci;
1008 make_rose->dest_addr = facilities.dest_addr;
1009 make_rose->dest_call = facilities.dest_call;
1010 make_rose->dest_ndigis = facilities.dest_ndigis;
1011 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1012 make_rose->dest_digis[n] = facilities.dest_digis[n];
1013 make_rose->source_addr = facilities.source_addr;
1014 make_rose->source_call = facilities.source_call;
1015 make_rose->source_ndigis = facilities.source_ndigis;
1016 for (n = 0 ; n < facilities.source_ndigis ; n++)
1017 make_rose->source_digis[n] = facilities.source_digis[n];
1018 make_rose->neighbour = neigh;
1019 make_rose->device = dev;
1020 make_rose->facilities = facilities;
1021
1022 make_rose->neighbour->use++;
1023
1024 if (rose_sk(sk)->defer) {
1025 make_rose->state = ROSE_STATE_5;
1026 } else {
1027 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1028 make_rose->state = ROSE_STATE_3;
1029 rose_start_idletimer(make);
1030 }
1031
1032 make_rose->condition = 0x00;
1033 make_rose->vs = 0;
1034 make_rose->va = 0;
1035 make_rose->vr = 0;
1036 make_rose->vl = 0;
1037 sk->sk_ack_backlog++;
1038
1039 rose_insert_socket(make);
1040
1041 skb_queue_head(&sk->sk_receive_queue, skb);
1042
1043 rose_start_heartbeat(make);
1044
1045 if (!sock_flag(sk, SOCK_DEAD))
1046 sk->sk_data_ready(sk);
1047
1048 return 1;
1049 }
1050
1051 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1052 {
1053 struct sock *sk = sock->sk;
1054 struct rose_sock *rose = rose_sk(sk);
1055 DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1056 int err;
1057 struct full_sockaddr_rose srose;
1058 struct sk_buff *skb;
1059 unsigned char *asmptr;
1060 int n, size, qbit = 0;
1061
1062 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1063 return -EINVAL;
1064
1065 if (sock_flag(sk, SOCK_ZAPPED))
1066 return -EADDRNOTAVAIL;
1067
1068 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1069 send_sig(SIGPIPE, current, 0);
1070 return -EPIPE;
1071 }
1072
1073 if (rose->neighbour == NULL || rose->device == NULL)
1074 return -ENETUNREACH;
1075
1076 if (usrose != NULL) {
1077 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1078 return -EINVAL;
1079 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1080 memcpy(&srose, usrose, msg->msg_namelen);
1081 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1082 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1083 return -EISCONN;
1084 if (srose.srose_ndigis != rose->dest_ndigis)
1085 return -EISCONN;
1086 if (srose.srose_ndigis == rose->dest_ndigis) {
1087 for (n = 0 ; n < srose.srose_ndigis ; n++)
1088 if (ax25cmp(&rose->dest_digis[n],
1089 &srose.srose_digis[n]))
1090 return -EISCONN;
1091 }
1092 if (srose.srose_family != AF_ROSE)
1093 return -EINVAL;
1094 } else {
1095 if (sk->sk_state != TCP_ESTABLISHED)
1096 return -ENOTCONN;
1097
1098 srose.srose_family = AF_ROSE;
1099 srose.srose_addr = rose->dest_addr;
1100 srose.srose_call = rose->dest_call;
1101 srose.srose_ndigis = rose->dest_ndigis;
1102 for (n = 0 ; n < rose->dest_ndigis ; n++)
1103 srose.srose_digis[n] = rose->dest_digis[n];
1104 }
1105
1106 /* Build a packet */
1107 /* Sanity check the packet size */
1108 if (len > 65535)
1109 return -EMSGSIZE;
1110
1111 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1112
1113 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1114 return err;
1115
1116 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1117
1118 /*
1119 * Put the data on the end
1120 */
1121
1122 skb_reset_transport_header(skb);
1123 skb_put(skb, len);
1124
1125 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1126 if (err) {
1127 kfree_skb(skb);
1128 return err;
1129 }
1130
1131 /*
1132 * If the Q BIT Include socket option is in force, the first
1133 * byte of the user data is the logical value of the Q Bit.
1134 */
1135 if (rose->qbitincl) {
1136 qbit = skb->data[0];
1137 skb_pull(skb, 1);
1138 }
1139
1140 /*
1141 * Push down the ROSE header
1142 */
1143 asmptr = skb_push(skb, ROSE_MIN_LEN);
1144
1145 /* Build a ROSE Network header */
1146 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1147 asmptr[1] = (rose->lci >> 0) & 0xFF;
1148 asmptr[2] = ROSE_DATA;
1149
1150 if (qbit)
1151 asmptr[0] |= ROSE_Q_BIT;
1152
1153 if (sk->sk_state != TCP_ESTABLISHED) {
1154 kfree_skb(skb);
1155 return -ENOTCONN;
1156 }
1157
1158 #ifdef M_BIT
1159 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1160 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1161 unsigned char header[ROSE_MIN_LEN];
1162 struct sk_buff *skbn;
1163 int frontlen;
1164 int lg;
1165
1166 /* Save a copy of the Header */
1167 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1168 skb_pull(skb, ROSE_MIN_LEN);
1169
1170 frontlen = skb_headroom(skb);
1171
1172 while (skb->len > 0) {
1173 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1174 kfree_skb(skb);
1175 return err;
1176 }
1177
1178 skbn->sk = sk;
1179 skbn->free = 1;
1180 skbn->arp = 1;
1181
1182 skb_reserve(skbn, frontlen);
1183
1184 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1185
1186 /* Copy the user data */
1187 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1188 skb_pull(skb, lg);
1189
1190 /* Duplicate the Header */
1191 skb_push(skbn, ROSE_MIN_LEN);
1192 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1193
1194 if (skb->len > 0)
1195 skbn->data[2] |= M_BIT;
1196
1197 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1198 }
1199
1200 skb->free = 1;
1201 kfree_skb(skb);
1202 } else {
1203 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1204 }
1205 #else
1206 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1207 #endif
1208
1209 rose_kick(sk);
1210
1211 return len;
1212 }
1213
1214
1215 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1216 int flags)
1217 {
1218 struct sock *sk = sock->sk;
1219 struct rose_sock *rose = rose_sk(sk);
1220 size_t copied;
1221 unsigned char *asmptr;
1222 struct sk_buff *skb;
1223 int n, er, qbit;
1224
1225 /*
1226 * This works for seqpacket too. The receiver has ordered the queue for
1227 * us! We do one quick check first though
1228 */
1229 if (sk->sk_state != TCP_ESTABLISHED)
1230 return -ENOTCONN;
1231
1232 /* Now we can treat all alike */
1233 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1234 return er;
1235
1236 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1237
1238 skb_pull(skb, ROSE_MIN_LEN);
1239
1240 if (rose->qbitincl) {
1241 asmptr = skb_push(skb, 1);
1242 *asmptr = qbit;
1243 }
1244
1245 skb_reset_transport_header(skb);
1246 copied = skb->len;
1247
1248 if (copied > size) {
1249 copied = size;
1250 msg->msg_flags |= MSG_TRUNC;
1251 }
1252
1253 skb_copy_datagram_msg(skb, 0, msg, copied);
1254
1255 if (msg->msg_name) {
1256 struct sockaddr_rose *srose;
1257 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1258 msg->msg_name);
1259
1260 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1261 srose = msg->msg_name;
1262 srose->srose_family = AF_ROSE;
1263 srose->srose_addr = rose->dest_addr;
1264 srose->srose_call = rose->dest_call;
1265 srose->srose_ndigis = rose->dest_ndigis;
1266 for (n = 0 ; n < rose->dest_ndigis ; n++)
1267 full_srose->srose_digis[n] = rose->dest_digis[n];
1268 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1269 }
1270
1271 skb_free_datagram(sk, skb);
1272
1273 return copied;
1274 }
1275
1276
1277 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1278 {
1279 struct sock *sk = sock->sk;
1280 struct rose_sock *rose = rose_sk(sk);
1281 void __user *argp = (void __user *)arg;
1282
1283 switch (cmd) {
1284 case TIOCOUTQ: {
1285 long amount;
1286
1287 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1288 if (amount < 0)
1289 amount = 0;
1290 return put_user(amount, (unsigned int __user *) argp);
1291 }
1292
1293 case TIOCINQ: {
1294 struct sk_buff *skb;
1295 long amount = 0L;
1296 /* These two are safe on a single CPU system as only user tasks fiddle here */
1297 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1298 amount = skb->len;
1299 return put_user(amount, (unsigned int __user *) argp);
1300 }
1301
1302 case SIOCGSTAMP:
1303 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1304
1305 case SIOCGSTAMPNS:
1306 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1307
1308 case SIOCGIFADDR:
1309 case SIOCSIFADDR:
1310 case SIOCGIFDSTADDR:
1311 case SIOCSIFDSTADDR:
1312 case SIOCGIFBRDADDR:
1313 case SIOCSIFBRDADDR:
1314 case SIOCGIFNETMASK:
1315 case SIOCSIFNETMASK:
1316 case SIOCGIFMETRIC:
1317 case SIOCSIFMETRIC:
1318 return -EINVAL;
1319
1320 case SIOCADDRT:
1321 case SIOCDELRT:
1322 case SIOCRSCLRRT:
1323 if (!capable(CAP_NET_ADMIN))
1324 return -EPERM;
1325 return rose_rt_ioctl(cmd, argp);
1326
1327 case SIOCRSGCAUSE: {
1328 struct rose_cause_struct rose_cause;
1329 rose_cause.cause = rose->cause;
1330 rose_cause.diagnostic = rose->diagnostic;
1331 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1332 }
1333
1334 case SIOCRSSCAUSE: {
1335 struct rose_cause_struct rose_cause;
1336 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1337 return -EFAULT;
1338 rose->cause = rose_cause.cause;
1339 rose->diagnostic = rose_cause.diagnostic;
1340 return 0;
1341 }
1342
1343 case SIOCRSSL2CALL:
1344 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1345 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1346 ax25_listen_release(&rose_callsign, NULL);
1347 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1348 return -EFAULT;
1349 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1350 return ax25_listen_register(&rose_callsign, NULL);
1351
1352 return 0;
1353
1354 case SIOCRSGL2CALL:
1355 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1356
1357 case SIOCRSACCEPT:
1358 if (rose->state == ROSE_STATE_5) {
1359 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1360 rose_start_idletimer(sk);
1361 rose->condition = 0x00;
1362 rose->vs = 0;
1363 rose->va = 0;
1364 rose->vr = 0;
1365 rose->vl = 0;
1366 rose->state = ROSE_STATE_3;
1367 }
1368 return 0;
1369
1370 default:
1371 return -ENOIOCTLCMD;
1372 }
1373
1374 return 0;
1375 }
1376
1377 #ifdef CONFIG_PROC_FS
1378 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1379 __acquires(rose_list_lock)
1380 {
1381 spin_lock_bh(&rose_list_lock);
1382 return seq_hlist_start_head(&rose_list, *pos);
1383 }
1384
1385 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1386 {
1387 return seq_hlist_next(v, &rose_list, pos);
1388 }
1389
1390 static void rose_info_stop(struct seq_file *seq, void *v)
1391 __releases(rose_list_lock)
1392 {
1393 spin_unlock_bh(&rose_list_lock);
1394 }
1395
1396 static int rose_info_show(struct seq_file *seq, void *v)
1397 {
1398 char buf[11], rsbuf[11];
1399
1400 if (v == SEQ_START_TOKEN)
1401 seq_puts(seq,
1402 "dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode\n");
1403
1404 else {
1405 struct sock *s = sk_entry(v);
1406 struct rose_sock *rose = rose_sk(s);
1407 const char *devname, *callsign;
1408 const struct net_device *dev = rose->device;
1409
1410 if (!dev)
1411 devname = "???";
1412 else
1413 devname = dev->name;
1414
1415 seq_printf(seq, "%-10s %-9s ",
1416 rose2asc(rsbuf, &rose->dest_addr),
1417 ax2asc(buf, &rose->dest_call));
1418
1419 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1420 callsign = "??????-?";
1421 else
1422 callsign = ax2asc(buf, &rose->source_call);
1423
1424 seq_printf(seq,
1425 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1426 rose2asc(rsbuf, &rose->source_addr),
1427 callsign,
1428 devname,
1429 rose->lci & 0x0FFF,
1430 (rose->neighbour) ? rose->neighbour->number : 0,
1431 rose->state,
1432 rose->vs,
1433 rose->vr,
1434 rose->va,
1435 ax25_display_timer(&rose->timer) / HZ,
1436 rose->t1 / HZ,
1437 rose->t2 / HZ,
1438 rose->t3 / HZ,
1439 rose->hb / HZ,
1440 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1441 rose->idle / (60 * HZ),
1442 sk_wmem_alloc_get(s),
1443 sk_rmem_alloc_get(s),
1444 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1445 }
1446
1447 return 0;
1448 }
1449
1450 static const struct seq_operations rose_info_seqops = {
1451 .start = rose_info_start,
1452 .next = rose_info_next,
1453 .stop = rose_info_stop,
1454 .show = rose_info_show,
1455 };
1456
1457 static int rose_info_open(struct inode *inode, struct file *file)
1458 {
1459 return seq_open(file, &rose_info_seqops);
1460 }
1461
1462 static const struct file_operations rose_info_fops = {
1463 .owner = THIS_MODULE,
1464 .open = rose_info_open,
1465 .read = seq_read,
1466 .llseek = seq_lseek,
1467 .release = seq_release,
1468 };
1469 #endif /* CONFIG_PROC_FS */
1470
1471 static const struct net_proto_family rose_family_ops = {
1472 .family = PF_ROSE,
1473 .create = rose_create,
1474 .owner = THIS_MODULE,
1475 };
1476
1477 static const struct proto_ops rose_proto_ops = {
1478 .family = PF_ROSE,
1479 .owner = THIS_MODULE,
1480 .release = rose_release,
1481 .bind = rose_bind,
1482 .connect = rose_connect,
1483 .socketpair = sock_no_socketpair,
1484 .accept = rose_accept,
1485 .getname = rose_getname,
1486 .poll = datagram_poll,
1487 .ioctl = rose_ioctl,
1488 .listen = rose_listen,
1489 .shutdown = sock_no_shutdown,
1490 .setsockopt = rose_setsockopt,
1491 .getsockopt = rose_getsockopt,
1492 .sendmsg = rose_sendmsg,
1493 .recvmsg = rose_recvmsg,
1494 .mmap = sock_no_mmap,
1495 .sendpage = sock_no_sendpage,
1496 };
1497
1498 static struct notifier_block rose_dev_notifier = {
1499 .notifier_call = rose_device_event,
1500 };
1501
1502 static struct net_device **dev_rose;
1503
1504 static struct ax25_protocol rose_pid = {
1505 .pid = AX25_P_ROSE,
1506 .func = rose_route_frame
1507 };
1508
1509 static struct ax25_linkfail rose_linkfail_notifier = {
1510 .func = rose_link_failed
1511 };
1512
1513 static int __init rose_proto_init(void)
1514 {
1515 int i;
1516 int rc;
1517
1518 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1519 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1520 rc = -EINVAL;
1521 goto out;
1522 }
1523
1524 rc = proto_register(&rose_proto, 0);
1525 if (rc != 0)
1526 goto out;
1527
1528 rose_callsign = null_ax25_address;
1529
1530 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1531 if (dev_rose == NULL) {
1532 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1533 rc = -ENOMEM;
1534 goto out_proto_unregister;
1535 }
1536
1537 for (i = 0; i < rose_ndevs; i++) {
1538 struct net_device *dev;
1539 char name[IFNAMSIZ];
1540
1541 sprintf(name, "rose%d", i);
1542 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1543 if (!dev) {
1544 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1545 rc = -ENOMEM;
1546 goto fail;
1547 }
1548 rc = register_netdev(dev);
1549 if (rc) {
1550 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1551 free_netdev(dev);
1552 goto fail;
1553 }
1554 rose_set_lockdep_key(dev);
1555 dev_rose[i] = dev;
1556 }
1557
1558 sock_register(&rose_family_ops);
1559 register_netdevice_notifier(&rose_dev_notifier);
1560
1561 ax25_register_pid(&rose_pid);
1562 ax25_linkfail_register(&rose_linkfail_notifier);
1563
1564 #ifdef CONFIG_SYSCTL
1565 rose_register_sysctl();
1566 #endif
1567 rose_loopback_init();
1568
1569 rose_add_loopback_neigh();
1570
1571 proc_create("rose", S_IRUGO, init_net.proc_net, &rose_info_fops);
1572 proc_create("rose_neigh", S_IRUGO, init_net.proc_net,
1573 &rose_neigh_fops);
1574 proc_create("rose_nodes", S_IRUGO, init_net.proc_net,
1575 &rose_nodes_fops);
1576 proc_create("rose_routes", S_IRUGO, init_net.proc_net,
1577 &rose_routes_fops);
1578 out:
1579 return rc;
1580 fail:
1581 while (--i >= 0) {
1582 unregister_netdev(dev_rose[i]);
1583 free_netdev(dev_rose[i]);
1584 }
1585 kfree(dev_rose);
1586 out_proto_unregister:
1587 proto_unregister(&rose_proto);
1588 goto out;
1589 }
1590 module_init(rose_proto_init);
1591
1592 module_param(rose_ndevs, int, 0);
1593 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1594
1595 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1596 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1597 MODULE_LICENSE("GPL");
1598 MODULE_ALIAS_NETPROTO(PF_ROSE);
1599
1600 static void __exit rose_exit(void)
1601 {
1602 int i;
1603
1604 remove_proc_entry("rose", init_net.proc_net);
1605 remove_proc_entry("rose_neigh", init_net.proc_net);
1606 remove_proc_entry("rose_nodes", init_net.proc_net);
1607 remove_proc_entry("rose_routes", init_net.proc_net);
1608 rose_loopback_clear();
1609
1610 rose_rt_free();
1611
1612 ax25_protocol_release(AX25_P_ROSE);
1613 ax25_linkfail_release(&rose_linkfail_notifier);
1614
1615 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1616 ax25_listen_release(&rose_callsign, NULL);
1617
1618 #ifdef CONFIG_SYSCTL
1619 rose_unregister_sysctl();
1620 #endif
1621 unregister_netdevice_notifier(&rose_dev_notifier);
1622
1623 sock_unregister(PF_ROSE);
1624
1625 for (i = 0; i < rose_ndevs; i++) {
1626 struct net_device *dev = dev_rose[i];
1627
1628 if (dev) {
1629 unregister_netdev(dev);
1630 free_netdev(dev);
1631 }
1632 }
1633
1634 kfree(dev_rose);
1635 proto_unregister(&rose_proto);
1636 }
1637
1638 module_exit(rose_exit);
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