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[AX.25]: Fix locking of ax25 protocol function list.
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / netrom / af_netrom.c
CommitLineData
1da177e4
LT		 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 Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
8 * Copyright Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
9 * Copyright Darryl Miles G7LED (dlm@g7led.demon.co.uk)
10 */
1da177e4
LT		 11#include <linux/module.h>
12#include <linux/moduleparam.h>
4fc268d2 13#include <linux/capability.h>
1da177e4
LT		 14#include <linux/errno.h>
15#include <linux/types.h>
16#include <linux/socket.h>
17#include <linux/in.h>
18#include <linux/kernel.h>
19#include <linux/sched.h>
20#include <linux/timer.h>
21#include <linux/string.h>
22#include <linux/sockios.h>
23#include <linux/net.h>
24#include <linux/stat.h>
25#include <net/ax25.h>
26#include <linux/inet.h>
27#include <linux/netdevice.h>
28#include <linux/if_arp.h>
29#include <linux/skbuff.h>
30#include <net/sock.h>
31#include <asm/uaccess.h>
32#include <asm/system.h>
33#include <linux/fcntl.h>
34#include <linux/termios.h> /* For TIOCINQ/OUTQ */
35#include <linux/mm.h>
36#include <linux/interrupt.h>
37#include <linux/notifier.h>
38#include <net/netrom.h>
39#include <linux/proc_fs.h>
40#include <linux/seq_file.h>
41#include <net/ip.h>
c752f073 42#include <net/tcp_states.h>
1da177e4
LT		 43#include <net/arp.h>
44#include <linux/init.h>
45
46static int nr_ndevs = 4;
47
48int sysctl_netrom_default_path_quality = NR_DEFAULT_QUAL;
49int sysctl_netrom_obsolescence_count_initialiser = NR_DEFAULT_OBS;
50int sysctl_netrom_network_ttl_initialiser = NR_DEFAULT_TTL;
51int sysctl_netrom_transport_timeout = NR_DEFAULT_T1;
52int sysctl_netrom_transport_maximum_tries = NR_DEFAULT_N2;
53int sysctl_netrom_transport_acknowledge_delay = NR_DEFAULT_T2;
54int sysctl_netrom_transport_busy_delay = NR_DEFAULT_T4;
55int sysctl_netrom_transport_requested_window_size = NR_DEFAULT_WINDOW;
56int sysctl_netrom_transport_no_activity_timeout = NR_DEFAULT_IDLE;
57int sysctl_netrom_routing_control = NR_DEFAULT_ROUTING;
58int sysctl_netrom_link_fails_count = NR_DEFAULT_FAILS;
e21ce8c7 59int sysctl_netrom_reset_circuit = NR_DEFAULT_RESET;
1da177e4
LT		 60
61static unsigned short circuit = 0x101;
62
63static HLIST_HEAD(nr_list);
64static DEFINE_SPINLOCK(nr_list_lock);
65
90ddc4f0 66static const struct proto_ops nr_proto_ops;
1da177e4
LT		 67
68/*
69 * Socket removal during an interrupt is now safe.
70 */
71static void nr_remove_socket(struct sock *sk)
72{
73 spin_lock_bh(&nr_list_lock);
74 sk_del_node_init(sk);
75 spin_unlock_bh(&nr_list_lock);
76}
77
78/*
79 * Kill all bound sockets on a dropped device.
80 */
81static void nr_kill_by_device(struct net_device *dev)
82{
83 struct sock *s;
84 struct hlist_node *node;
85
86 spin_lock_bh(&nr_list_lock);
87 sk_for_each(s, node, &nr_list)
88 if (nr_sk(s)->device == dev)
89 nr_disconnect(s, ENETUNREACH);
90 spin_unlock_bh(&nr_list_lock);
91}
92
93/*
94 * Handle device status changes.
95 */
96static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr)
97{
98 struct net_device *dev = (struct net_device *)ptr;
99
100 if (event != NETDEV_DOWN)
101 return NOTIFY_DONE;
102
103 nr_kill_by_device(dev);
104 nr_rt_device_down(dev);
105
106 return NOTIFY_DONE;
107}
108
109/*
110 * Add a socket to the bound sockets list.
111 */
112static void nr_insert_socket(struct sock *sk)
113{
114 spin_lock_bh(&nr_list_lock);
115 sk_add_node(sk, &nr_list);
116 spin_unlock_bh(&nr_list_lock);
117}
118
119/*
120 * Find a socket that wants to accept the Connect Request we just
121 * received.
122 */
123static struct sock *nr_find_listener(ax25_address *addr)
124{
125 struct sock *s;
126 struct hlist_node *node;
127
128 spin_lock_bh(&nr_list_lock);
129 sk_for_each(s, node, &nr_list)
130 if (!ax25cmp(&nr_sk(s)->source_addr, addr) &&
131 s->sk_state == TCP_LISTEN) {
132 bh_lock_sock(s);
133 goto found;
134 }
135 s = NULL;
136found:
137 spin_unlock_bh(&nr_list_lock);
138 return s;
139}
140
141/*
142 * Find a connected NET/ROM socket given my circuit IDs.
143 */
144static struct sock *nr_find_socket(unsigned char index, unsigned char id)
145{
146 struct sock *s;
147 struct hlist_node *node;
148
149 spin_lock_bh(&nr_list_lock);
150 sk_for_each(s, node, &nr_list) {
151 struct nr_sock *nr = nr_sk(s);
152
153 if (nr->my_index == index && nr->my_id == id) {
154 bh_lock_sock(s);
155 goto found;
156 }
157 }
158 s = NULL;
159found:
160 spin_unlock_bh(&nr_list_lock);
161 return s;
162}
163
164/*
165 * Find a connected NET/ROM socket given their circuit IDs.
166 */
167static struct sock *nr_find_peer(unsigned char index, unsigned char id,
168 ax25_address *dest)
169{
170 struct sock *s;
171 struct hlist_node *node;
172
173 spin_lock_bh(&nr_list_lock);
174 sk_for_each(s, node, &nr_list) {
175 struct nr_sock *nr = nr_sk(s);
176
177 if (nr->your_index == index && nr->your_id == id &&
178 !ax25cmp(&nr->dest_addr, dest)) {
179 bh_lock_sock(s);
180 goto found;
181 }
182 }
183 s = NULL;
184found:
185 spin_unlock_bh(&nr_list_lock);
186 return s;
187}
188
189/*
190 * Find next free circuit ID.
191 */
192static unsigned short nr_find_next_circuit(void)
193{
194 unsigned short id = circuit;
195 unsigned char i, j;
196 struct sock *sk;
197
198 for (;;) {
199 i = id / 256;
200 j = id % 256;
201
202 if (i != 0 && j != 0) {
203 if ((sk=nr_find_socket(i, j)) == NULL)
204 break;
205 bh_unlock_sock(sk);
206 }
207
208 id++;
209 }
210
211 return id;
212}
213
214/*
215 * Deferred destroy.
216 */
217void nr_destroy_socket(struct sock *);
218
219/*
220 * Handler for deferred kills.
221 */
222static void nr_destroy_timer(unsigned long data)
223{
224 struct sock *sk=(struct sock *)data;
225 bh_lock_sock(sk);
226 sock_hold(sk);
227 nr_destroy_socket(sk);
228 bh_unlock_sock(sk);
229 sock_put(sk);
230}
231
232/*
233 * This is called from user mode and the timers. Thus it protects itself
234 * against interrupt users but doesn't worry about being called during
235 * work. Once it is removed from the queue no interrupt or bottom half
236 * will touch it and we are (fairly 8-) ) safe.
237 */
238void nr_destroy_socket(struct sock *sk)
239{
240 struct sk_buff *skb;
241
242 nr_remove_socket(sk);
243
244 nr_stop_heartbeat(sk);
245 nr_stop_t1timer(sk);
246 nr_stop_t2timer(sk);
247 nr_stop_t4timer(sk);
248 nr_stop_idletimer(sk);
249
250 nr_clear_queues(sk); /* Flush the queues */
251
252 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
253 if (skb->sk != sk) { /* A pending connection */
254 /* Queue the unaccepted socket for death */
255 sock_set_flag(skb->sk, SOCK_DEAD);
256 nr_start_heartbeat(skb->sk);
257 nr_sk(skb->sk)->state = NR_STATE_0;
258 }
259
260 kfree_skb(skb);
261 }
262
263 if (atomic_read(&sk->sk_wmem_alloc) ||
264 atomic_read(&sk->sk_rmem_alloc)) {
265 /* Defer: outstanding buffers */
266 sk->sk_timer.function = nr_destroy_timer;
267 sk->sk_timer.expires = jiffies + 2 * HZ;
268 add_timer(&sk->sk_timer);
269 } else
270 sock_put(sk);
271}
272
273/*
274 * Handling for system calls applied via the various interfaces to a
275 * NET/ROM socket object.
276 */
277
278static int nr_setsockopt(struct socket *sock, int level, int optname,
279 char __user *optval, int optlen)
280{
281 struct sock *sk = sock->sk;
282 struct nr_sock *nr = nr_sk(sk);
283 int opt;
284
285 if (level != SOL_NETROM)
286 return -ENOPROTOOPT;
287
288 if (optlen < sizeof(int))
289 return -EINVAL;
290
291 if (get_user(opt, (int __user *)optval))
292 return -EFAULT;
293
294 switch (optname) {
295 case NETROM_T1:
296 if (opt < 1)
297 return -EINVAL;
298 nr->t1 = opt * HZ;
299 return 0;
300
301 case NETROM_T2:
302 if (opt < 1)
303 return -EINVAL;
304 nr->t2 = opt * HZ;
305 return 0;
306
307 case NETROM_N2:
308 if (opt < 1 || opt > 31)
309 return -EINVAL;
310 nr->n2 = opt;
311 return 0;
312
313 case NETROM_T4:
314 if (opt < 1)
315 return -EINVAL;
316 nr->t4 = opt * HZ;
317 return 0;
318
319 case NETROM_IDLE:
320 if (opt < 0)
321 return -EINVAL;
322 nr->idle = opt * 60 * HZ;
323 return 0;
324
325 default:
326 return -ENOPROTOOPT;
327 }
328}
329
330static int nr_getsockopt(struct socket *sock, int level, int optname,
331 char __user *optval, int __user *optlen)
332{
333 struct sock *sk = sock->sk;
334 struct nr_sock *nr = nr_sk(sk);
335 int val = 0;
336 int len;
337
338 if (level != SOL_NETROM)
339 return -ENOPROTOOPT;
340
341 if (get_user(len, optlen))
342 return -EFAULT;
343
344 if (len < 0)
345 return -EINVAL;
346
347 switch (optname) {
348 case NETROM_T1:
349 val = nr->t1 / HZ;
350 break;
351
352 case NETROM_T2:
353 val = nr->t2 / HZ;
354 break;
355
356 case NETROM_N2:
357 val = nr->n2;
358 break;
359
360 case NETROM_T4:
361 val = nr->t4 / HZ;
362 break;
363
364 case NETROM_IDLE:
365 val = nr->idle / (60 * HZ);
366 break;
367
368 default:
369 return -ENOPROTOOPT;
370 }
371
372 len = min_t(unsigned int, len, sizeof(int));
373
374 if (put_user(len, optlen))
375 return -EFAULT;
376
377 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
378}
379
380static int nr_listen(struct socket *sock, int backlog)
381{
382 struct sock *sk = sock->sk;
383
384 lock_sock(sk);
385 if (sk->sk_state != TCP_LISTEN) {
386 memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN);
387 sk->sk_max_ack_backlog = backlog;
388 sk->sk_state = TCP_LISTEN;
389 release_sock(sk);
390 return 0;
391 }
392 release_sock(sk);
393
394 return -EOPNOTSUPP;
395}
396
397static struct proto nr_proto = {
398 .name = "NETROM",
399 .owner = THIS_MODULE,
400 .obj_size = sizeof(struct nr_sock),
401};
402
403static int nr_create(struct socket *sock, int protocol)
404{
405 struct sock *sk;
406 struct nr_sock *nr;
407
408 if (sock->type != SOCK_SEQPACKET || protocol != 0)
409 return -ESOCKTNOSUPPORT;
410
411 if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, &nr_proto, 1)) == NULL)
412 return -ENOMEM;
413
414 nr = nr_sk(sk);
415
416 sock_init_data(sock, sk);
417
418 sock->ops = &nr_proto_ops;
419 sk->sk_protocol = protocol;
420
421 skb_queue_head_init(&nr->ack_queue);
422 skb_queue_head_init(&nr->reseq_queue);
423 skb_queue_head_init(&nr->frag_queue);
424
425 nr_init_timers(sk);
426
4d8937d0
RB		 427 nr->t1 =
428 msecs_to_jiffies(sysctl_netrom_transport_timeout);
429 nr->t2 =
430 msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay);
431 nr->n2 =
432 msecs_to_jiffies(sysctl_netrom_transport_maximum_tries);
433 nr->t4 =
434 msecs_to_jiffies(sysctl_netrom_transport_busy_delay);
435 nr->idle =
436 msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout);
1da177e4
LT		 437 nr->window = sysctl_netrom_transport_requested_window_size;
438
439 nr->bpqext = 1;
440 nr->state = NR_STATE_0;
441
442 return 0;
443}
444
445static struct sock *nr_make_new(struct sock *osk)
446{
447 struct sock *sk;
448 struct nr_sock *nr, *onr;
449
450 if (osk->sk_type != SOCK_SEQPACKET)
451 return NULL;
452
453 if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, osk->sk_prot, 1)) == NULL)
454 return NULL;
455
456 nr = nr_sk(sk);
457
458 sock_init_data(NULL, sk);
459
460 sk->sk_type = osk->sk_type;
461 sk->sk_socket = osk->sk_socket;
462 sk->sk_priority = osk->sk_priority;
463 sk->sk_protocol = osk->sk_protocol;
464 sk->sk_rcvbuf = osk->sk_rcvbuf;
465 sk->sk_sndbuf = osk->sk_sndbuf;
466 sk->sk_state = TCP_ESTABLISHED;
467 sk->sk_sleep = osk->sk_sleep;
53b924b3 468 sock_copy_flags(sk, osk);
1da177e4
LT		 469
470 skb_queue_head_init(&nr->ack_queue);
471 skb_queue_head_init(&nr->reseq_queue);
472 skb_queue_head_init(&nr->frag_queue);
473
474 nr_init_timers(sk);
475
476 onr = nr_sk(osk);
477
478 nr->t1 = onr->t1;
479 nr->t2 = onr->t2;
480 nr->n2 = onr->n2;
481 nr->t4 = onr->t4;
482 nr->idle = onr->idle;
483 nr->window = onr->window;
484
485 nr->device = onr->device;
486 nr->bpqext = onr->bpqext;
487
488 return sk;
489}
490
491static int nr_release(struct socket *sock)
492{
493 struct sock *sk = sock->sk;
494 struct nr_sock *nr;
495
496 if (sk == NULL) return 0;
497
498 sock_hold(sk);
499 lock_sock(sk);
500 nr = nr_sk(sk);
501
502 switch (nr->state) {
503 case NR_STATE_0:
504 case NR_STATE_1:
505 case NR_STATE_2:
506 nr_disconnect(sk, 0);
507 nr_destroy_socket(sk);
508 break;
509
510 case NR_STATE_3:
511 nr_clear_queues(sk);
512 nr->n2count = 0;
513 nr_write_internal(sk, NR_DISCREQ);
514 nr_start_t1timer(sk);
515 nr_stop_t2timer(sk);
516 nr_stop_t4timer(sk);
517 nr_stop_idletimer(sk);
518 nr->state = NR_STATE_2;
519 sk->sk_state = TCP_CLOSE;
520 sk->sk_shutdown |= SEND_SHUTDOWN;
521 sk->sk_state_change(sk);
522 sock_orphan(sk);
523 sock_set_flag(sk, SOCK_DESTROY);
524 sk->sk_socket = NULL;
525 break;
526
527 default:
528 sk->sk_socket = NULL;
529 break;
530 }
531
532 sock->sk = NULL;
533 release_sock(sk);
534 sock_put(sk);
535
536 return 0;
537}
538
539static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
540{
541 struct sock *sk = sock->sk;
542 struct nr_sock *nr = nr_sk(sk);
543 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
544 struct net_device *dev;
01d7dd0e
RB		 545 ax25_uid_assoc *user;
546 ax25_address *source;
1da177e4
LT		 547
548 lock_sock(sk);
549 if (!sock_flag(sk, SOCK_ZAPPED)) {
550 release_sock(sk);
551 return -EINVAL;
552 }
553 if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) {
554 release_sock(sk);
555 return -EINVAL;
556 }
557 if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) {
558 release_sock(sk);
559 return -EINVAL;
560 }
561 if (addr->fsa_ax25.sax25_family != AF_NETROM) {
562 release_sock(sk);
563 return -EINVAL;
564 }
565 if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) {
566 SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n");
567 release_sock(sk);
568 return -EADDRNOTAVAIL;
569 }
570
571 /*
572 * Only the super user can set an arbitrary user callsign.
573 */
574 if (addr->fsa_ax25.sax25_ndigis == 1) {
575 if (!capable(CAP_NET_BIND_SERVICE)) {
576 dev_put(dev);
577 release_sock(sk);
578 return -EACCES;
579 }
580 nr->user_addr = addr->fsa_digipeater[0];
581 nr->source_addr = addr->fsa_ax25.sax25_call;
582 } else {
583 source = &addr->fsa_ax25.sax25_call;
584
01d7dd0e
RB		 585 user = ax25_findbyuid(current->euid);
586 if (user) {
587 nr->user_addr = user->call;
588 ax25_uid_put(user);
589 } else {
1da177e4
LT		 590 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
591 release_sock(sk);
592 dev_put(dev);
593 return -EPERM;
594 }
01d7dd0e 595 nr->user_addr = *source;
1da177e4
LT		 596 }
597
1da177e4
LT		 598 nr->source_addr = *source;
599 }
600
601 nr->device = dev;
602 nr_insert_socket(sk);
603
604 sock_reset_flag(sk, SOCK_ZAPPED);
605 dev_put(dev);
606 release_sock(sk);
607 SOCK_DEBUG(sk, "NET/ROM: socket is bound\n");
608 return 0;
609}
610
611static int nr_connect(struct socket *sock, struct sockaddr *uaddr,
612 int addr_len, int flags)
613{
614 struct sock *sk = sock->sk;
615 struct nr_sock *nr = nr_sk(sk);
616 struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr;
01d7dd0e
RB		 617 ax25_address *source = NULL;
618 ax25_uid_assoc *user;
1da177e4
LT		 619 struct net_device *dev;
620
621 lock_sock(sk);
622 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
623 sock->state = SS_CONNECTED;
624 release_sock(sk);
625 return 0; /* Connect completed during a ERESTARTSYS event */
626 }
627
628 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
629 sock->state = SS_UNCONNECTED;
630 release_sock(sk);
631 return -ECONNREFUSED;
632 }
633
634 if (sk->sk_state == TCP_ESTABLISHED) {
635 release_sock(sk);
636 return -EISCONN; /* No reconnect on a seqpacket socket */
637 }
638
639 sk->sk_state = TCP_CLOSE;
640 sock->state = SS_UNCONNECTED;
641
642 if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) {
643 release_sock(sk);
644 return -EINVAL;
645 }
646 if (addr->sax25_family != AF_NETROM) {
647 release_sock(sk);
648 return -EINVAL;
649 }
650 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
651 sock_reset_flag(sk, SOCK_ZAPPED);
652
653 if ((dev = nr_dev_first()) == NULL) {
654 release_sock(sk);
655 return -ENETUNREACH;
656 }
657 source = (ax25_address *)dev->dev_addr;
658
01d7dd0e
RB		 659 user = ax25_findbyuid(current->euid);
660 if (user) {
661 nr->user_addr = user->call;
662 ax25_uid_put(user);
663 } else {
1da177e4
LT		 664 if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) {
665 dev_put(dev);
666 release_sock(sk);
667 return -EPERM;
668 }
01d7dd0e 669 nr->user_addr = *source;
1da177e4
LT		 670 }
671
1da177e4
LT		 672 nr->source_addr = *source;
673 nr->device = dev;
674
675 dev_put(dev);
676 nr_insert_socket(sk); /* Finish the bind */
677 }
678
679 nr->dest_addr = addr->sax25_call;
680
681 release_sock(sk);
682 circuit = nr_find_next_circuit();
683 lock_sock(sk);
684
685 nr->my_index = circuit / 256;
686 nr->my_id = circuit % 256;
687
688 circuit++;
689
690 /* Move to connecting socket, start sending Connect Requests */
691 sock->state = SS_CONNECTING;
692 sk->sk_state = TCP_SYN_SENT;
693
694 nr_establish_data_link(sk);
695
696 nr->state = NR_STATE_1;
697
698 nr_start_heartbeat(sk);
699
700 /* Now the loop */
701 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
702 release_sock(sk);
703 return -EINPROGRESS;
704 }
705
706 /*
707 * A Connect Ack with Choke or timeout or failed routing will go to
708 * closed.
709 */
710 if (sk->sk_state == TCP_SYN_SENT) {
711 struct task_struct *tsk = current;
712 DECLARE_WAITQUEUE(wait, tsk);
713
714 add_wait_queue(sk->sk_sleep, &wait);
715 for (;;) {
716 set_current_state(TASK_INTERRUPTIBLE);
717 if (sk->sk_state != TCP_SYN_SENT)
718 break;
719 release_sock(sk);
720 if (!signal_pending(tsk)) {
721 schedule();
722 lock_sock(sk);
723 continue;
724 }
725 current->state = TASK_RUNNING;
726 remove_wait_queue(sk->sk_sleep, &wait);
727 return -ERESTARTSYS;
728 }
729 current->state = TASK_RUNNING;
730 remove_wait_queue(sk->sk_sleep, &wait);
731 }
732
733 if (sk->sk_state != TCP_ESTABLISHED) {
734 sock->state = SS_UNCONNECTED;
735 release_sock(sk);
736 return sock_error(sk); /* Always set at this point */
737 }
738
739 sock->state = SS_CONNECTED;
740 release_sock(sk);
741
742 return 0;
743}
744
745static int nr_accept(struct socket *sock, struct socket *newsock, int flags)
746{
747 struct task_struct *tsk = current;
748 DECLARE_WAITQUEUE(wait, tsk);
749 struct sk_buff *skb;
750 struct sock *newsk;
751 struct sock *sk;
752 int err = 0;
753
754 if ((sk = sock->sk) == NULL)
755 return -EINVAL;
756
757 lock_sock(sk);
758 if (sk->sk_type != SOCK_SEQPACKET) {
759 err = -EOPNOTSUPP;
760 goto out;
761 }
762
763 if (sk->sk_state != TCP_LISTEN) {
764 err = -EINVAL;
765 goto out;
766 }
767
768 /*
769 * The write queue this time is holding sockets ready to use
770 * hooked into the SABM we saved
771 */
772 add_wait_queue(sk->sk_sleep, &wait);
773 for (;;) {
774 skb = skb_dequeue(&sk->sk_receive_queue);
775 if (skb)
776 break;
777
778 current->state = TASK_INTERRUPTIBLE;
779 release_sock(sk);
780 if (flags & O_NONBLOCK) {
781 current->state = TASK_RUNNING;
782 remove_wait_queue(sk->sk_sleep, &wait);
783 return -EWOULDBLOCK;
784 }
785 if (!signal_pending(tsk)) {
786 schedule();
787 lock_sock(sk);
788 continue;
789 }
790 current->state = TASK_RUNNING;
791 remove_wait_queue(sk->sk_sleep, &wait);
792 return -ERESTARTSYS;
793 }
794 current->state = TASK_RUNNING;
795 remove_wait_queue(sk->sk_sleep, &wait);
796
797 newsk = skb->sk;
798 newsk->sk_socket = newsock;
799 newsk->sk_sleep = &newsock->wait;
800
801 /* Now attach up the new socket */
802 kfree_skb(skb);
18601a7d 803 sk_acceptq_removed(sk);
1da177e4
LT		 804 newsock->sk = newsk;
805
806out:
807 release_sock(sk);
808 return err;
809}
810
811static int nr_getname(struct socket *sock, struct sockaddr *uaddr,
812 int *uaddr_len, int peer)
813{
814 struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr;
815 struct sock *sk = sock->sk;
816 struct nr_sock *nr = nr_sk(sk);
817
818 lock_sock(sk);
819 if (peer != 0) {
820 if (sk->sk_state != TCP_ESTABLISHED) {
821 release_sock(sk);
822 return -ENOTCONN;
823 }
824 sax->fsa_ax25.sax25_family = AF_NETROM;
825 sax->fsa_ax25.sax25_ndigis = 1;
826 sax->fsa_ax25.sax25_call = nr->user_addr;
827 sax->fsa_digipeater[0] = nr->dest_addr;
828 *uaddr_len = sizeof(struct full_sockaddr_ax25);
829 } else {
830 sax->fsa_ax25.sax25_family = AF_NETROM;
831 sax->fsa_ax25.sax25_ndigis = 0;
832 sax->fsa_ax25.sax25_call = nr->source_addr;
833 *uaddr_len = sizeof(struct sockaddr_ax25);
834 }
835 release_sock(sk);
836
837 return 0;
838}
839
840int nr_rx_frame(struct sk_buff *skb, struct net_device *dev)
841{
842 struct sock *sk;
843 struct sock *make;
844 struct nr_sock *nr_make;
845 ax25_address *src, *dest, *user;
846 unsigned short circuit_index, circuit_id;
847 unsigned short peer_circuit_index, peer_circuit_id;
848 unsigned short frametype, flags, window, timeout;
849 int ret;
850
851 skb->sk = NULL; /* Initially we don't know who it's for */
852
853 /*
854 * skb->data points to the netrom frame start
855 */
856
857 src = (ax25_address *)(skb->data + 0);
858 dest = (ax25_address *)(skb->data + 7);
859
860 circuit_index = skb->data[15];
861 circuit_id = skb->data[16];
862 peer_circuit_index = skb->data[17];
863 peer_circuit_id = skb->data[18];
864 frametype = skb->data[19] & 0x0F;
865 flags = skb->data[19] & 0xF0;
866
1da177e4
LT		 867 /*
868 * Check for an incoming IP over NET/ROM frame.
869 */
98a82feb
RB		 870 if (frametype == NR_PROTOEXT &&
871 circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) {
1da177e4
LT		 872 skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
873 skb->h.raw = skb->data;
874
875 return nr_rx_ip(skb, dev);
876 }
1da177e4
LT		 877
878 /*
879 * Find an existing socket connection, based on circuit ID, if it's
880 * a Connect Request base it on their circuit ID.
881 *
882 * Circuit ID 0/0 is not valid but it could still be a "reset" for a
883 * circuit that no longer exists at the other end ...
884 */
885
886 sk = NULL;
887
888 if (circuit_index == 0 && circuit_id == 0) {
889 if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG)
890 sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src);
891 } else {
892 if (frametype == NR_CONNREQ)
893 sk = nr_find_peer(circuit_index, circuit_id, src);
894 else
895 sk = nr_find_socket(circuit_index, circuit_id);
896 }
897
898 if (sk != NULL) {
899 skb->h.raw = skb->data;
900
901 if (frametype == NR_CONNACK && skb->len == 22)
902 nr_sk(sk)->bpqext = 1;
903 else
904 nr_sk(sk)->bpqext = 0;
905
906 ret = nr_process_rx_frame(sk, skb);
907 bh_unlock_sock(sk);
908 return ret;
909 }
910
911 /*
912 * Now it should be a CONNREQ.
913 */
914 if (frametype != NR_CONNREQ) {
915 /*
916 * Here it would be nice to be able to send a reset but
e21ce8c7
RB		 917 * NET/ROM doesn't have one. We've tried to extend the protocol
918 * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that
919 * apparently kills BPQ boxes... :-(
920 * So now we try to follow the established behaviour of
921 * G8PZT's Xrouter which is sending packets with command type 7
922 * as an extension of the protocol.
1da177e4 923 */
e21ce8c7
RB		 924 if (sysctl_netrom_reset_circuit &&
925 (frametype != NR_RESET || flags != 0))
926 nr_transmit_reset(skb, 1);
927
1da177e4
LT		 928 return 0;
929 }
930
931 sk = nr_find_listener(dest);
932
933 user = (ax25_address *)(skb->data + 21);
934
935 if (sk == NULL || sk_acceptq_is_full(sk) ||
936 (make = nr_make_new(sk)) == NULL) {
937 nr_transmit_refusal(skb, 0);
938 if (sk)
939 bh_unlock_sock(sk);
940 return 0;
941 }
942
943 window = skb->data[20];
944
945 skb->sk = make;
946 make->sk_state = TCP_ESTABLISHED;
947
948 /* Fill in his circuit details */
949 nr_make = nr_sk(make);
950 nr_make->source_addr = *dest;
951 nr_make->dest_addr = *src;
952 nr_make->user_addr = *user;
953
954 nr_make->your_index = circuit_index;
955 nr_make->your_id = circuit_id;
956
957 bh_unlock_sock(sk);
958 circuit = nr_find_next_circuit();
959 bh_lock_sock(sk);
960
961 nr_make->my_index = circuit / 256;
962 nr_make->my_id = circuit % 256;
963
964 circuit++;
965
966 /* Window negotiation */
967 if (window < nr_make->window)
968 nr_make->window = window;
969
970 /* L4 timeout negotiation */
971 if (skb->len == 37) {
972 timeout = skb->data[36] * 256 + skb->data[35];
973 if (timeout * HZ < nr_make->t1)
974 nr_make->t1 = timeout * HZ;
975 nr_make->bpqext = 1;
976 } else {
977 nr_make->bpqext = 0;
978 }
979
980 nr_write_internal(make, NR_CONNACK);
981
982 nr_make->condition = 0x00;
983 nr_make->vs = 0;
984 nr_make->va = 0;
985 nr_make->vr = 0;
986 nr_make->vl = 0;
987 nr_make->state = NR_STATE_3;
18601a7d 988 sk_acceptq_added(sk);
1da177e4
LT		 989
990 nr_insert_socket(make);
991
992 skb_queue_head(&sk->sk_receive_queue, skb);
993
994 nr_start_heartbeat(make);
995 nr_start_idletimer(make);
996
997 if (!sock_flag(sk, SOCK_DEAD))
998 sk->sk_data_ready(sk, skb->len);
999
1000 bh_unlock_sock(sk);
1001 return 1;
1002}
1003
1004static int nr_sendmsg(struct kiocb *iocb, struct socket *sock,
1005 struct msghdr *msg, size_t len)
1006{
1007 struct sock *sk = sock->sk;
1008 struct nr_sock *nr = nr_sk(sk);
1009 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1010 int err;
1011 struct sockaddr_ax25 sax;
1012 struct sk_buff *skb;
1013 unsigned char *asmptr;
1014 int size;
1015
1016 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1017 return -EINVAL;
1018
1019 lock_sock(sk);
1020 if (sock_flag(sk, SOCK_ZAPPED)) {
1021 err = -EADDRNOTAVAIL;
1022 goto out;
1023 }
1024
1025 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1026 send_sig(SIGPIPE, current, 0);
1027 err = -EPIPE;
1028 goto out;
1029 }
1030
1031 if (nr->device == NULL) {
1032 err = -ENETUNREACH;
1033 goto out;
1034 }
1035
1036 if (usax) {
1037 if (msg->msg_namelen < sizeof(sax)) {
1038 err = -EINVAL;
1039 goto out;
1040 }
1041 sax = *usax;
1042 if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) {
1043 err = -EISCONN;
1044 goto out;
1045 }
1046 if (sax.sax25_family != AF_NETROM) {
1047 err = -EINVAL;
1048 goto out;
1049 }
1050 } else {
1051 if (sk->sk_state != TCP_ESTABLISHED) {
1052 err = -ENOTCONN;
1053 goto out;
1054 }
1055 sax.sax25_family = AF_NETROM;
1056 sax.sax25_call = nr->dest_addr;
1057 }
1058
1059 SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n");
1060
1061 /* Build a packet */
1062 SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n");
1063 size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN;
1064
1065 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1066 goto out;
1067
1068 skb_reserve(skb, size - len);
1069
1070 /*
1071 * Push down the NET/ROM header
1072 */
1073
1074 asmptr = skb_push(skb, NR_TRANSPORT_LEN);
1075 SOCK_DEBUG(sk, "Building NET/ROM Header.\n");
1076
1077 /* Build a NET/ROM Transport header */
1078
1079 *asmptr++ = nr->your_index;
1080 *asmptr++ = nr->your_id;
1081 *asmptr++ = 0; /* To be filled in later */
1082 *asmptr++ = 0; /* Ditto */
1083 *asmptr++ = NR_INFO;
1084 SOCK_DEBUG(sk, "Built header.\n");
1085
1086 /*
1087 * Put the data on the end
1088 */
1089
1090 skb->h.raw = skb_put(skb, len);
1091
1092 asmptr = skb->h.raw;
1093 SOCK_DEBUG(sk, "NET/ROM: Appending user data\n");
1094
1095 /* User data follows immediately after the NET/ROM transport header */
1096 if (memcpy_fromiovec(asmptr, msg->msg_iov, len)) {
1097 kfree_skb(skb);
1098 err = -EFAULT;
1099 goto out;
1100 }
1101
1102 SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n");
1103
1104 if (sk->sk_state != TCP_ESTABLISHED) {
1105 kfree_skb(skb);
1106 err = -ENOTCONN;
1107 goto out;
1108 }
1109
1110 nr_output(sk, skb); /* Shove it onto the queue */
1111
1112 err = len;
1113out:
1114 release_sock(sk);
1115 return err;
1116}
1117
1118static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
1119 struct msghdr *msg, size_t size, int flags)
1120{
1121 struct sock *sk = sock->sk;
1122 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1123 size_t copied;
1124 struct sk_buff *skb;
1125 int er;
1126
1127 /*
1128 * This works for seqpacket too. The receiver has ordered the queue for
1129 * us! We do one quick check first though
1130 */
1131
1132 lock_sock(sk);
1133 if (sk->sk_state != TCP_ESTABLISHED) {
1134 release_sock(sk);
1135 return -ENOTCONN;
1136 }
1137
1138 /* Now we can treat all alike */
1139 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) {
1140 release_sock(sk);
1141 return er;
1142 }
1143
1144 skb->h.raw = skb->data;
1145 copied = skb->len;
1146
1147 if (copied > size) {
1148 copied = size;
1149 msg->msg_flags |= MSG_TRUNC;
1150 }
1151
1152 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1153
1154 if (sax != NULL) {
1155 sax->sax25_family = AF_NETROM;
1156 memcpy(sax->sax25_call.ax25_call, skb->data + 7, AX25_ADDR_LEN);
1157 }
1158
1159 msg->msg_namelen = sizeof(*sax);
1160
1161 skb_free_datagram(sk, skb);
1162
1163 release_sock(sk);
1164 return copied;
1165}
1166
1167
1168static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1169{
1170 struct sock *sk = sock->sk;
1171 void __user *argp = (void __user *)arg;
1172 int ret;
1173
1da177e4
LT		 1174 switch (cmd) {
1175 case TIOCOUTQ: {
1176 long amount;
5ff7630e
CH		 1177
1178 lock_sock(sk);
1da177e4
LT		 1179 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1180 if (amount < 0)
1181 amount = 0;
1182 release_sock(sk);
1183 return put_user(amount, (int __user *)argp);
1184 }
1185
1186 case TIOCINQ: {
1187 struct sk_buff *skb;
1188 long amount = 0L;
5ff7630e
CH		 1189
1190 lock_sock(sk);
1da177e4
LT		 1191 /* These two are safe on a single CPU system as only user tasks fiddle here */
1192 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1193 amount = skb->len;
1194 release_sock(sk);
1195 return put_user(amount, (int __user *)argp);
1196 }
1197
1198 case SIOCGSTAMP:
5ff7630e 1199 lock_sock(sk);
9b37ee75 1200 ret = sock_get_timestamp(sk, argp);
1da177e4
LT		 1201 release_sock(sk);
1202 return ret;
1203
1204 case SIOCGIFADDR:
1205 case SIOCSIFADDR:
1206 case SIOCGIFDSTADDR:
1207 case SIOCSIFDSTADDR:
1208 case SIOCGIFBRDADDR:
1209 case SIOCSIFBRDADDR:
1210 case SIOCGIFNETMASK:
1211 case SIOCSIFNETMASK:
1212 case SIOCGIFMETRIC:
1213 case SIOCSIFMETRIC:
1da177e4
LT		 1214 return -EINVAL;
1215
1216 case SIOCADDRT:
1217 case SIOCDELRT:
1218 case SIOCNRDECOBS:
1da177e4
LT		 1219 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1220 return nr_rt_ioctl(cmd, argp);
1221
1222 default:
b5e5fa5e 1223 return -ENOIOCTLCMD;
1da177e4 1224 }
1da177e4
LT		 1225
1226 return 0;
1227}
1228
1229#ifdef CONFIG_PROC_FS
1230
1231static void *nr_info_start(struct seq_file *seq, loff_t *pos)
1232{
1233 struct sock *s;
1234 struct hlist_node *node;
1235 int i = 1;
1236
1237 spin_lock_bh(&nr_list_lock);
1238 if (*pos == 0)
1239 return SEQ_START_TOKEN;
1240
1241 sk_for_each(s, node, &nr_list) {
1242 if (i == *pos)
1243 return s;
1244 ++i;
1245 }
1246 return NULL;
1247}
1248
1249static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos)
1250{
1251 ++*pos;
1252
1253 return (v == SEQ_START_TOKEN) ? sk_head(&nr_list)
1254 : sk_next((struct sock *)v);
1255}
1256
1257static void nr_info_stop(struct seq_file *seq, void *v)
1258{
1259 spin_unlock_bh(&nr_list_lock);
1260}
1261
1262static int nr_info_show(struct seq_file *seq, void *v)
1263{
1264 struct sock *s = v;
1265 struct net_device *dev;
1266 struct nr_sock *nr;
1267 const char *devname;
f75268cd 1268 char buf[11];
1da177e4
LT		 1269
1270 if (v == SEQ_START_TOKEN)
1271 seq_puts(seq,
1272"user_addr dest_node src_node dev my your st vs vr va t1 t2 t4 idle n2 wnd Snd-Q Rcv-Q inode\n");
1273
1274 else {
1275
1276 bh_lock_sock(s);
1277 nr = nr_sk(s);
1278
1279 if ((dev = nr->device) == NULL)
1280 devname = "???";
1281 else
1282 devname = dev->name;
1283
f75268cd
RB		 1284 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->user_addr));
1285 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->dest_addr));
1da177e4
LT		 1286 seq_printf(seq,
1287"%-9s %-3s %02X/%02X %02X/%02X %2d %3d %3d %3d %3lu/%03lu %2lu/%02lu %3lu/%03lu %3lu/%03lu %2d/%02d %3d %5d %5d %ld\n",
f75268cd 1288 ax2asc(buf, &nr->source_addr),
1da177e4
LT		 1289 devname,
1290 nr->my_index,
1291 nr->my_id,
1292 nr->your_index,
1293 nr->your_id,
1294 nr->state,
1295 nr->vs,
1296 nr->vr,
1297 nr->va,
1298 ax25_display_timer(&nr->t1timer) / HZ,
1299 nr->t1 / HZ,
1300 ax25_display_timer(&nr->t2timer) / HZ,
1301 nr->t2 / HZ,
1302 ax25_display_timer(&nr->t4timer) / HZ,
1303 nr->t4 / HZ,
1304 ax25_display_timer(&nr->idletimer) / (60 * HZ),
1305 nr->idle / (60 * HZ),
1306 nr->n2count,
1307 nr->n2,
1308 nr->window,
1309 atomic_read(&s->sk_wmem_alloc),
1310 atomic_read(&s->sk_rmem_alloc),
1311 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1312
1313 bh_unlock_sock(s);
1314 }
1315 return 0;
1316}
1317
1318static struct seq_operations nr_info_seqops = {
1319 .start = nr_info_start,
1320 .next = nr_info_next,
1321 .stop = nr_info_stop,
1322 .show = nr_info_show,
1323};
1324
1325static int nr_info_open(struct inode *inode, struct file *file)
1326{
1327 return seq_open(file, &nr_info_seqops);
1328}
1329
1330static struct file_operations nr_info_fops = {
1331 .owner = THIS_MODULE,
1332 .open = nr_info_open,
1333 .read = seq_read,
1334 .llseek = seq_lseek,
1335 .release = seq_release,
1336};
1337#endif /* CONFIG_PROC_FS */
1338
1339static struct net_proto_family nr_family_ops = {
1340 .family = PF_NETROM,
1341 .create = nr_create,
1342 .owner = THIS_MODULE,
1343};
1344
90ddc4f0 1345static const struct proto_ops nr_proto_ops = {
1da177e4
LT		 1346 .family = PF_NETROM,
1347 .owner = THIS_MODULE,
1348 .release = nr_release,
1349 .bind = nr_bind,
1350 .connect = nr_connect,
1351 .socketpair = sock_no_socketpair,
1352 .accept = nr_accept,
1353 .getname = nr_getname,
1354 .poll = datagram_poll,
1355 .ioctl = nr_ioctl,
1356 .listen = nr_listen,
1357 .shutdown = sock_no_shutdown,
1358 .setsockopt = nr_setsockopt,
1359 .getsockopt = nr_getsockopt,
1360 .sendmsg = nr_sendmsg,
1361 .recvmsg = nr_recvmsg,
1362 .mmap = sock_no_mmap,
1363 .sendpage = sock_no_sendpage,
1364};
1365
1366static struct notifier_block nr_dev_notifier = {
1367 .notifier_call = nr_device_event,
1368};
1369
1370static struct net_device **dev_nr;
1371
1da177e4
LT		 1372static int __init nr_proto_init(void)
1373{
1374 int i;
1375 int rc = proto_register(&nr_proto, 0);
1376
1377 if (rc != 0)
1378 goto out;
1379
1380 if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) {
1381 printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n");
1382 return -1;
1383 }
1384
1b30dd35 1385 dev_nr = kzalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1da177e4
LT		 1386 if (dev_nr == NULL) {
1387 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n");
1388 return -1;
1389 }
1390
1da177e4
LT		 1391 for (i = 0; i < nr_ndevs; i++) {
1392 char name[IFNAMSIZ];
1393 struct net_device *dev;
1394
1395 sprintf(name, "nr%d", i);
b88a762b 1396 dev = alloc_netdev(sizeof(struct nr_private), name, nr_setup);
1da177e4
LT		 1397 if (!dev) {
1398 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n");
1399 goto fail;
1400 }
1401
1402 dev->base_addr = i;
1403 if (register_netdev(dev)) {
1404 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n");
1405 free_netdev(dev);
1406 goto fail;
1407 }
1408 dev_nr[i] = dev;
1409 }
1410
1411 if (sock_register(&nr_family_ops)) {
1412 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n");
1413 goto fail;
1414 }
1415
1416 register_netdevice_notifier(&nr_dev_notifier);
1da177e4
LT		 1417
1418 ax25_protocol_register(AX25_P_NETROM, nr_route_frame);
1419 ax25_linkfail_register(nr_link_failed);
1420
1421#ifdef CONFIG_SYSCTL
1422 nr_register_sysctl();
1423#endif
1424
1425 nr_loopback_init();
1426
1427 proc_net_fops_create("nr", S_IRUGO, &nr_info_fops);
1428 proc_net_fops_create("nr_neigh", S_IRUGO, &nr_neigh_fops);
1429 proc_net_fops_create("nr_nodes", S_IRUGO, &nr_nodes_fops);
1430out:
1431 return rc;
1432fail:
1433 while (--i >= 0) {
1434 unregister_netdev(dev_nr[i]);
1435 free_netdev(dev_nr[i]);
1436 }
1437 kfree(dev_nr);
1438 proto_unregister(&nr_proto);
1439 rc = -1;
1440 goto out;
1441}
1442
1443module_init(nr_proto_init);
1444
1445module_param(nr_ndevs, int, 0);
1446MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices");
1447
1448MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1449MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol");
1450MODULE_LICENSE("GPL");
1451MODULE_ALIAS_NETPROTO(PF_NETROM);
1452
1453static void __exit nr_exit(void)
1454{
1455 int i;
1456
1457 proc_net_remove("nr");
1458 proc_net_remove("nr_neigh");
1459 proc_net_remove("nr_nodes");
1460 nr_loopback_clear();
1461
1462 nr_rt_free();
1463
1464#ifdef CONFIG_SYSCTL
1465 nr_unregister_sysctl();
1466#endif
1467
1468 ax25_linkfail_release(nr_link_failed);
1469 ax25_protocol_release(AX25_P_NETROM);
1470
1471 unregister_netdevice_notifier(&nr_dev_notifier);
1472
1473 sock_unregister(PF_NETROM);
1474
1475 for (i = 0; i < nr_ndevs; i++) {
1476 struct net_device *dev = dev_nr[i];
1477 if (dev) {
1478 unregister_netdev(dev);
1479 free_netdev(dev);
1480 }
1481 }
1482
1483 kfree(dev_nr);
1484 proto_unregister(&nr_proto);
1485}
1486module_exit(nr_exit);
kernel source for telekom puls (alcatel/mediatek)