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[NETLINK] genetlink: fix cmd type in genl_ops to be consistent to u8
[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 */
11#include <linux/config.h>
12#include <linux/module.h>
13#include <linux/moduleparam.h>
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
427 nr->t1 = sysctl_netrom_transport_timeout;
428 nr->t2 = sysctl_netrom_transport_acknowledge_delay;
429 nr->n2 = sysctl_netrom_transport_maximum_tries;
430 nr->t4 = sysctl_netrom_transport_busy_delay;
431 nr->idle = sysctl_netrom_transport_no_activity_timeout;
432 nr->window = sysctl_netrom_transport_requested_window_size;
433
434 nr->bpqext = 1;
435 nr->state = NR_STATE_0;
436
437 return 0;
438}
439
440static struct sock *nr_make_new(struct sock *osk)
441{
442 struct sock *sk;
443 struct nr_sock *nr, *onr;
444
445 if (osk->sk_type != SOCK_SEQPACKET)
446 return NULL;
447
448 if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, osk->sk_prot, 1)) == NULL)
449 return NULL;
450
451 nr = nr_sk(sk);
452
453 sock_init_data(NULL, sk);
454
455 sk->sk_type = osk->sk_type;
456 sk->sk_socket = osk->sk_socket;
457 sk->sk_priority = osk->sk_priority;
458 sk->sk_protocol = osk->sk_protocol;
459 sk->sk_rcvbuf = osk->sk_rcvbuf;
460 sk->sk_sndbuf = osk->sk_sndbuf;
461 sk->sk_state = TCP_ESTABLISHED;
462 sk->sk_sleep = osk->sk_sleep;
53b924b3 463 sock_copy_flags(sk, osk);
1da177e4
LT		 464
465 skb_queue_head_init(&nr->ack_queue);
466 skb_queue_head_init(&nr->reseq_queue);
467 skb_queue_head_init(&nr->frag_queue);
468
469 nr_init_timers(sk);
470
471 onr = nr_sk(osk);
472
473 nr->t1 = onr->t1;
474 nr->t2 = onr->t2;
475 nr->n2 = onr->n2;
476 nr->t4 = onr->t4;
477 nr->idle = onr->idle;
478 nr->window = onr->window;
479
480 nr->device = onr->device;
481 nr->bpqext = onr->bpqext;
482
483 return sk;
484}
485
486static int nr_release(struct socket *sock)
487{
488 struct sock *sk = sock->sk;
489 struct nr_sock *nr;
490
491 if (sk == NULL) return 0;
492
493 sock_hold(sk);
494 lock_sock(sk);
495 nr = nr_sk(sk);
496
497 switch (nr->state) {
498 case NR_STATE_0:
499 case NR_STATE_1:
500 case NR_STATE_2:
501 nr_disconnect(sk, 0);
502 nr_destroy_socket(sk);
503 break;
504
505 case NR_STATE_3:
506 nr_clear_queues(sk);
507 nr->n2count = 0;
508 nr_write_internal(sk, NR_DISCREQ);
509 nr_start_t1timer(sk);
510 nr_stop_t2timer(sk);
511 nr_stop_t4timer(sk);
512 nr_stop_idletimer(sk);
513 nr->state = NR_STATE_2;
514 sk->sk_state = TCP_CLOSE;
515 sk->sk_shutdown |= SEND_SHUTDOWN;
516 sk->sk_state_change(sk);
517 sock_orphan(sk);
518 sock_set_flag(sk, SOCK_DESTROY);
519 sk->sk_socket = NULL;
520 break;
521
522 default:
523 sk->sk_socket = NULL;
524 break;
525 }
526
527 sock->sk = NULL;
528 release_sock(sk);
529 sock_put(sk);
530
531 return 0;
532}
533
534static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
535{
536 struct sock *sk = sock->sk;
537 struct nr_sock *nr = nr_sk(sk);
538 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
539 struct net_device *dev;
01d7dd0e
RB		 540 ax25_uid_assoc *user;
541 ax25_address *source;
1da177e4
LT		 542
543 lock_sock(sk);
544 if (!sock_flag(sk, SOCK_ZAPPED)) {
545 release_sock(sk);
546 return -EINVAL;
547 }
548 if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) {
549 release_sock(sk);
550 return -EINVAL;
551 }
552 if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) {
553 release_sock(sk);
554 return -EINVAL;
555 }
556 if (addr->fsa_ax25.sax25_family != AF_NETROM) {
557 release_sock(sk);
558 return -EINVAL;
559 }
560 if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) {
561 SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n");
562 release_sock(sk);
563 return -EADDRNOTAVAIL;
564 }
565
566 /*
567 * Only the super user can set an arbitrary user callsign.
568 */
569 if (addr->fsa_ax25.sax25_ndigis == 1) {
570 if (!capable(CAP_NET_BIND_SERVICE)) {
571 dev_put(dev);
572 release_sock(sk);
573 return -EACCES;
574 }
575 nr->user_addr = addr->fsa_digipeater[0];
576 nr->source_addr = addr->fsa_ax25.sax25_call;
577 } else {
578 source = &addr->fsa_ax25.sax25_call;
579
01d7dd0e
RB		 580 user = ax25_findbyuid(current->euid);
581 if (user) {
582 nr->user_addr = user->call;
583 ax25_uid_put(user);
584 } else {
1da177e4
LT		 585 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
586 release_sock(sk);
587 dev_put(dev);
588 return -EPERM;
589 }
01d7dd0e 590 nr->user_addr = *source;
1da177e4
LT		 591 }
592
1da177e4
LT		 593 nr->source_addr = *source;
594 }
595
596 nr->device = dev;
597 nr_insert_socket(sk);
598
599 sock_reset_flag(sk, SOCK_ZAPPED);
600 dev_put(dev);
601 release_sock(sk);
602 SOCK_DEBUG(sk, "NET/ROM: socket is bound\n");
603 return 0;
604}
605
606static int nr_connect(struct socket *sock, struct sockaddr *uaddr,
607 int addr_len, int flags)
608{
609 struct sock *sk = sock->sk;
610 struct nr_sock *nr = nr_sk(sk);
611 struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr;
01d7dd0e
RB		 612 ax25_address *source = NULL;
613 ax25_uid_assoc *user;
1da177e4
LT		 614 struct net_device *dev;
615
616 lock_sock(sk);
617 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
618 sock->state = SS_CONNECTED;
619 release_sock(sk);
620 return 0; /* Connect completed during a ERESTARTSYS event */
621 }
622
623 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
624 sock->state = SS_UNCONNECTED;
625 release_sock(sk);
626 return -ECONNREFUSED;
627 }
628
629 if (sk->sk_state == TCP_ESTABLISHED) {
630 release_sock(sk);
631 return -EISCONN; /* No reconnect on a seqpacket socket */
632 }
633
634 sk->sk_state = TCP_CLOSE;
635 sock->state = SS_UNCONNECTED;
636
637 if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) {
638 release_sock(sk);
639 return -EINVAL;
640 }
641 if (addr->sax25_family != AF_NETROM) {
642 release_sock(sk);
643 return -EINVAL;
644 }
645 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
646 sock_reset_flag(sk, SOCK_ZAPPED);
647
648 if ((dev = nr_dev_first()) == NULL) {
649 release_sock(sk);
650 return -ENETUNREACH;
651 }
652 source = (ax25_address *)dev->dev_addr;
653
01d7dd0e
RB		 654 user = ax25_findbyuid(current->euid);
655 if (user) {
656 nr->user_addr = user->call;
657 ax25_uid_put(user);
658 } else {
1da177e4
LT		 659 if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) {
660 dev_put(dev);
661 release_sock(sk);
662 return -EPERM;
663 }
01d7dd0e 664 nr->user_addr = *source;
1da177e4
LT		 665 }
666
1da177e4
LT		 667 nr->source_addr = *source;
668 nr->device = dev;
669
670 dev_put(dev);
671 nr_insert_socket(sk); /* Finish the bind */
672 }
673
674 nr->dest_addr = addr->sax25_call;
675
676 release_sock(sk);
677 circuit = nr_find_next_circuit();
678 lock_sock(sk);
679
680 nr->my_index = circuit / 256;
681 nr->my_id = circuit % 256;
682
683 circuit++;
684
685 /* Move to connecting socket, start sending Connect Requests */
686 sock->state = SS_CONNECTING;
687 sk->sk_state = TCP_SYN_SENT;
688
689 nr_establish_data_link(sk);
690
691 nr->state = NR_STATE_1;
692
693 nr_start_heartbeat(sk);
694
695 /* Now the loop */
696 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
697 release_sock(sk);
698 return -EINPROGRESS;
699 }
700
701 /*
702 * A Connect Ack with Choke or timeout or failed routing will go to
703 * closed.
704 */
705 if (sk->sk_state == TCP_SYN_SENT) {
706 struct task_struct *tsk = current;
707 DECLARE_WAITQUEUE(wait, tsk);
708
709 add_wait_queue(sk->sk_sleep, &wait);
710 for (;;) {
711 set_current_state(TASK_INTERRUPTIBLE);
712 if (sk->sk_state != TCP_SYN_SENT)
713 break;
714 release_sock(sk);
715 if (!signal_pending(tsk)) {
716 schedule();
717 lock_sock(sk);
718 continue;
719 }
720 current->state = TASK_RUNNING;
721 remove_wait_queue(sk->sk_sleep, &wait);
722 return -ERESTARTSYS;
723 }
724 current->state = TASK_RUNNING;
725 remove_wait_queue(sk->sk_sleep, &wait);
726 }
727
728 if (sk->sk_state != TCP_ESTABLISHED) {
729 sock->state = SS_UNCONNECTED;
730 release_sock(sk);
731 return sock_error(sk); /* Always set at this point */
732 }
733
734 sock->state = SS_CONNECTED;
735 release_sock(sk);
736
737 return 0;
738}
739
740static int nr_accept(struct socket *sock, struct socket *newsock, int flags)
741{
742 struct task_struct *tsk = current;
743 DECLARE_WAITQUEUE(wait, tsk);
744 struct sk_buff *skb;
745 struct sock *newsk;
746 struct sock *sk;
747 int err = 0;
748
749 if ((sk = sock->sk) == NULL)
750 return -EINVAL;
751
752 lock_sock(sk);
753 if (sk->sk_type != SOCK_SEQPACKET) {
754 err = -EOPNOTSUPP;
755 goto out;
756 }
757
758 if (sk->sk_state != TCP_LISTEN) {
759 err = -EINVAL;
760 goto out;
761 }
762
763 /*
764 * The write queue this time is holding sockets ready to use
765 * hooked into the SABM we saved
766 */
767 add_wait_queue(sk->sk_sleep, &wait);
768 for (;;) {
769 skb = skb_dequeue(&sk->sk_receive_queue);
770 if (skb)
771 break;
772
773 current->state = TASK_INTERRUPTIBLE;
774 release_sock(sk);
775 if (flags & O_NONBLOCK) {
776 current->state = TASK_RUNNING;
777 remove_wait_queue(sk->sk_sleep, &wait);
778 return -EWOULDBLOCK;
779 }
780 if (!signal_pending(tsk)) {
781 schedule();
782 lock_sock(sk);
783 continue;
784 }
785 current->state = TASK_RUNNING;
786 remove_wait_queue(sk->sk_sleep, &wait);
787 return -ERESTARTSYS;
788 }
789 current->state = TASK_RUNNING;
790 remove_wait_queue(sk->sk_sleep, &wait);
791
792 newsk = skb->sk;
793 newsk->sk_socket = newsock;
794 newsk->sk_sleep = &newsock->wait;
795
796 /* Now attach up the new socket */
797 kfree_skb(skb);
798 sk->sk_ack_backlog--;
799 newsock->sk = newsk;
800
801out:
802 release_sock(sk);
803 return err;
804}
805
806static int nr_getname(struct socket *sock, struct sockaddr *uaddr,
807 int *uaddr_len, int peer)
808{
809 struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr;
810 struct sock *sk = sock->sk;
811 struct nr_sock *nr = nr_sk(sk);
812
813 lock_sock(sk);
814 if (peer != 0) {
815 if (sk->sk_state != TCP_ESTABLISHED) {
816 release_sock(sk);
817 return -ENOTCONN;
818 }
819 sax->fsa_ax25.sax25_family = AF_NETROM;
820 sax->fsa_ax25.sax25_ndigis = 1;
821 sax->fsa_ax25.sax25_call = nr->user_addr;
822 sax->fsa_digipeater[0] = nr->dest_addr;
823 *uaddr_len = sizeof(struct full_sockaddr_ax25);
824 } else {
825 sax->fsa_ax25.sax25_family = AF_NETROM;
826 sax->fsa_ax25.sax25_ndigis = 0;
827 sax->fsa_ax25.sax25_call = nr->source_addr;
828 *uaddr_len = sizeof(struct sockaddr_ax25);
829 }
830 release_sock(sk);
831
832 return 0;
833}
834
835int nr_rx_frame(struct sk_buff *skb, struct net_device *dev)
836{
837 struct sock *sk;
838 struct sock *make;
839 struct nr_sock *nr_make;
840 ax25_address *src, *dest, *user;
841 unsigned short circuit_index, circuit_id;
842 unsigned short peer_circuit_index, peer_circuit_id;
843 unsigned short frametype, flags, window, timeout;
844 int ret;
845
846 skb->sk = NULL; /* Initially we don't know who it's for */
847
848 /*
849 * skb->data points to the netrom frame start
850 */
851
852 src = (ax25_address *)(skb->data + 0);
853 dest = (ax25_address *)(skb->data + 7);
854
855 circuit_index = skb->data[15];
856 circuit_id = skb->data[16];
857 peer_circuit_index = skb->data[17];
858 peer_circuit_id = skb->data[18];
859 frametype = skb->data[19] & 0x0F;
860 flags = skb->data[19] & 0xF0;
861
1da177e4
LT		 862 /*
863 * Check for an incoming IP over NET/ROM frame.
864 */
98a82feb
RB		 865 if (frametype == NR_PROTOEXT &&
866 circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) {
1da177e4
LT		 867 skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
868 skb->h.raw = skb->data;
869
870 return nr_rx_ip(skb, dev);
871 }
1da177e4
LT		 872
873 /*
874 * Find an existing socket connection, based on circuit ID, if it's
875 * a Connect Request base it on their circuit ID.
876 *
877 * Circuit ID 0/0 is not valid but it could still be a "reset" for a
878 * circuit that no longer exists at the other end ...
879 */
880
881 sk = NULL;
882
883 if (circuit_index == 0 && circuit_id == 0) {
884 if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG)
885 sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src);
886 } else {
887 if (frametype == NR_CONNREQ)
888 sk = nr_find_peer(circuit_index, circuit_id, src);
889 else
890 sk = nr_find_socket(circuit_index, circuit_id);
891 }
892
893 if (sk != NULL) {
894 skb->h.raw = skb->data;
895
896 if (frametype == NR_CONNACK && skb->len == 22)
897 nr_sk(sk)->bpqext = 1;
898 else
899 nr_sk(sk)->bpqext = 0;
900
901 ret = nr_process_rx_frame(sk, skb);
902 bh_unlock_sock(sk);
903 return ret;
904 }
905
906 /*
907 * Now it should be a CONNREQ.
908 */
909 if (frametype != NR_CONNREQ) {
910 /*
911 * Here it would be nice to be able to send a reset but
e21ce8c7
RB		 912 * NET/ROM doesn't have one. We've tried to extend the protocol
913 * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that
914 * apparently kills BPQ boxes... :-(
915 * So now we try to follow the established behaviour of
916 * G8PZT's Xrouter which is sending packets with command type 7
917 * as an extension of the protocol.
1da177e4 918 */
e21ce8c7
RB		 919 if (sysctl_netrom_reset_circuit &&
920 (frametype != NR_RESET || flags != 0))
921 nr_transmit_reset(skb, 1);
922
1da177e4
LT		 923 return 0;
924 }
925
926 sk = nr_find_listener(dest);
927
928 user = (ax25_address *)(skb->data + 21);
929
930 if (sk == NULL || sk_acceptq_is_full(sk) ||
931 (make = nr_make_new(sk)) == NULL) {
932 nr_transmit_refusal(skb, 0);
933 if (sk)
934 bh_unlock_sock(sk);
935 return 0;
936 }
937
938 window = skb->data[20];
939
940 skb->sk = make;
941 make->sk_state = TCP_ESTABLISHED;
942
943 /* Fill in his circuit details */
944 nr_make = nr_sk(make);
945 nr_make->source_addr = *dest;
946 nr_make->dest_addr = *src;
947 nr_make->user_addr = *user;
948
949 nr_make->your_index = circuit_index;
950 nr_make->your_id = circuit_id;
951
952 bh_unlock_sock(sk);
953 circuit = nr_find_next_circuit();
954 bh_lock_sock(sk);
955
956 nr_make->my_index = circuit / 256;
957 nr_make->my_id = circuit % 256;
958
959 circuit++;
960
961 /* Window negotiation */
962 if (window < nr_make->window)
963 nr_make->window = window;
964
965 /* L4 timeout negotiation */
966 if (skb->len == 37) {
967 timeout = skb->data[36] * 256 + skb->data[35];
968 if (timeout * HZ < nr_make->t1)
969 nr_make->t1 = timeout * HZ;
970 nr_make->bpqext = 1;
971 } else {
972 nr_make->bpqext = 0;
973 }
974
975 nr_write_internal(make, NR_CONNACK);
976
977 nr_make->condition = 0x00;
978 nr_make->vs = 0;
979 nr_make->va = 0;
980 nr_make->vr = 0;
981 nr_make->vl = 0;
982 nr_make->state = NR_STATE_3;
983 sk->sk_ack_backlog++;
984
985 nr_insert_socket(make);
986
987 skb_queue_head(&sk->sk_receive_queue, skb);
988
989 nr_start_heartbeat(make);
990 nr_start_idletimer(make);
991
992 if (!sock_flag(sk, SOCK_DEAD))
993 sk->sk_data_ready(sk, skb->len);
994
995 bh_unlock_sock(sk);
996 return 1;
997}
998
999static int nr_sendmsg(struct kiocb *iocb, struct socket *sock,
1000 struct msghdr *msg, size_t len)
1001{
1002 struct sock *sk = sock->sk;
1003 struct nr_sock *nr = nr_sk(sk);
1004 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1005 int err;
1006 struct sockaddr_ax25 sax;
1007 struct sk_buff *skb;
1008 unsigned char *asmptr;
1009 int size;
1010
1011 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1012 return -EINVAL;
1013
1014 lock_sock(sk);
1015 if (sock_flag(sk, SOCK_ZAPPED)) {
1016 err = -EADDRNOTAVAIL;
1017 goto out;
1018 }
1019
1020 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1021 send_sig(SIGPIPE, current, 0);
1022 err = -EPIPE;
1023 goto out;
1024 }
1025
1026 if (nr->device == NULL) {
1027 err = -ENETUNREACH;
1028 goto out;
1029 }
1030
1031 if (usax) {
1032 if (msg->msg_namelen < sizeof(sax)) {
1033 err = -EINVAL;
1034 goto out;
1035 }
1036 sax = *usax;
1037 if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) {
1038 err = -EISCONN;
1039 goto out;
1040 }
1041 if (sax.sax25_family != AF_NETROM) {
1042 err = -EINVAL;
1043 goto out;
1044 }
1045 } else {
1046 if (sk->sk_state != TCP_ESTABLISHED) {
1047 err = -ENOTCONN;
1048 goto out;
1049 }
1050 sax.sax25_family = AF_NETROM;
1051 sax.sax25_call = nr->dest_addr;
1052 }
1053
1054 SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n");
1055
1056 /* Build a packet */
1057 SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n");
1058 size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN;
1059
1060 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1061 goto out;
1062
1063 skb_reserve(skb, size - len);
1064
1065 /*
1066 * Push down the NET/ROM header
1067 */
1068
1069 asmptr = skb_push(skb, NR_TRANSPORT_LEN);
1070 SOCK_DEBUG(sk, "Building NET/ROM Header.\n");
1071
1072 /* Build a NET/ROM Transport header */
1073
1074 *asmptr++ = nr->your_index;
1075 *asmptr++ = nr->your_id;
1076 *asmptr++ = 0; /* To be filled in later */
1077 *asmptr++ = 0; /* Ditto */
1078 *asmptr++ = NR_INFO;
1079 SOCK_DEBUG(sk, "Built header.\n");
1080
1081 /*
1082 * Put the data on the end
1083 */
1084
1085 skb->h.raw = skb_put(skb, len);
1086
1087 asmptr = skb->h.raw;
1088 SOCK_DEBUG(sk, "NET/ROM: Appending user data\n");
1089
1090 /* User data follows immediately after the NET/ROM transport header */
1091 if (memcpy_fromiovec(asmptr, msg->msg_iov, len)) {
1092 kfree_skb(skb);
1093 err = -EFAULT;
1094 goto out;
1095 }
1096
1097 SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n");
1098
1099 if (sk->sk_state != TCP_ESTABLISHED) {
1100 kfree_skb(skb);
1101 err = -ENOTCONN;
1102 goto out;
1103 }
1104
1105 nr_output(sk, skb); /* Shove it onto the queue */
1106
1107 err = len;
1108out:
1109 release_sock(sk);
1110 return err;
1111}
1112
1113static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
1114 struct msghdr *msg, size_t size, int flags)
1115{
1116 struct sock *sk = sock->sk;
1117 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1118 size_t copied;
1119 struct sk_buff *skb;
1120 int er;
1121
1122 /*
1123 * This works for seqpacket too. The receiver has ordered the queue for
1124 * us! We do one quick check first though
1125 */
1126
1127 lock_sock(sk);
1128 if (sk->sk_state != TCP_ESTABLISHED) {
1129 release_sock(sk);
1130 return -ENOTCONN;
1131 }
1132
1133 /* Now we can treat all alike */
1134 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) {
1135 release_sock(sk);
1136 return er;
1137 }
1138
1139 skb->h.raw = skb->data;
1140 copied = skb->len;
1141
1142 if (copied > size) {
1143 copied = size;
1144 msg->msg_flags |= MSG_TRUNC;
1145 }
1146
1147 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1148
1149 if (sax != NULL) {
1150 sax->sax25_family = AF_NETROM;
1151 memcpy(sax->sax25_call.ax25_call, skb->data + 7, AX25_ADDR_LEN);
1152 }
1153
1154 msg->msg_namelen = sizeof(*sax);
1155
1156 skb_free_datagram(sk, skb);
1157
1158 release_sock(sk);
1159 return copied;
1160}
1161
1162
1163static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1164{
1165 struct sock *sk = sock->sk;
1166 void __user *argp = (void __user *)arg;
1167 int ret;
1168
1169 lock_sock(sk);
1170 switch (cmd) {
1171 case TIOCOUTQ: {
1172 long amount;
1173 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1174 if (amount < 0)
1175 amount = 0;
1176 release_sock(sk);
1177 return put_user(amount, (int __user *)argp);
1178 }
1179
1180 case TIOCINQ: {
1181 struct sk_buff *skb;
1182 long amount = 0L;
1183 /* These two are safe on a single CPU system as only user tasks fiddle here */
1184 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1185 amount = skb->len;
1186 release_sock(sk);
1187 return put_user(amount, (int __user *)argp);
1188 }
1189
1190 case SIOCGSTAMP:
9b37ee75 1191 ret = sock_get_timestamp(sk, argp);
1da177e4
LT		 1192 release_sock(sk);
1193 return ret;
1194
1195 case SIOCGIFADDR:
1196 case SIOCSIFADDR:
1197 case SIOCGIFDSTADDR:
1198 case SIOCSIFDSTADDR:
1199 case SIOCGIFBRDADDR:
1200 case SIOCSIFBRDADDR:
1201 case SIOCGIFNETMASK:
1202 case SIOCSIFNETMASK:
1203 case SIOCGIFMETRIC:
1204 case SIOCSIFMETRIC:
1205 release_sock(sk);
1206 return -EINVAL;
1207
1208 case SIOCADDRT:
1209 case SIOCDELRT:
1210 case SIOCNRDECOBS:
1211 release_sock(sk);
1212 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1213 return nr_rt_ioctl(cmd, argp);
1214
1215 default:
1216 release_sock(sk);
1217 return dev_ioctl(cmd, argp);
1218 }
1219 release_sock(sk);
1220
1221 return 0;
1222}
1223
1224#ifdef CONFIG_PROC_FS
1225
1226static void *nr_info_start(struct seq_file *seq, loff_t *pos)
1227{
1228 struct sock *s;
1229 struct hlist_node *node;
1230 int i = 1;
1231
1232 spin_lock_bh(&nr_list_lock);
1233 if (*pos == 0)
1234 return SEQ_START_TOKEN;
1235
1236 sk_for_each(s, node, &nr_list) {
1237 if (i == *pos)
1238 return s;
1239 ++i;
1240 }
1241 return NULL;
1242}
1243
1244static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos)
1245{
1246 ++*pos;
1247
1248 return (v == SEQ_START_TOKEN) ? sk_head(&nr_list)
1249 : sk_next((struct sock *)v);
1250}
1251
1252static void nr_info_stop(struct seq_file *seq, void *v)
1253{
1254 spin_unlock_bh(&nr_list_lock);
1255}
1256
1257static int nr_info_show(struct seq_file *seq, void *v)
1258{
1259 struct sock *s = v;
1260 struct net_device *dev;
1261 struct nr_sock *nr;
1262 const char *devname;
f75268cd 1263 char buf[11];
1da177e4
LT		 1264
1265 if (v == SEQ_START_TOKEN)
1266 seq_puts(seq,
1267"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");
1268
1269 else {
1270
1271 bh_lock_sock(s);
1272 nr = nr_sk(s);
1273
1274 if ((dev = nr->device) == NULL)
1275 devname = "???";
1276 else
1277 devname = dev->name;
1278
f75268cd
RB		 1279 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->user_addr));
1280 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->dest_addr));
1da177e4
LT		 1281 seq_printf(seq,
1282"%-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 1283 ax2asc(buf, &nr->source_addr),
1da177e4
LT		 1284 devname,
1285 nr->my_index,
1286 nr->my_id,
1287 nr->your_index,
1288 nr->your_id,
1289 nr->state,
1290 nr->vs,
1291 nr->vr,
1292 nr->va,
1293 ax25_display_timer(&nr->t1timer) / HZ,
1294 nr->t1 / HZ,
1295 ax25_display_timer(&nr->t2timer) / HZ,
1296 nr->t2 / HZ,
1297 ax25_display_timer(&nr->t4timer) / HZ,
1298 nr->t4 / HZ,
1299 ax25_display_timer(&nr->idletimer) / (60 * HZ),
1300 nr->idle / (60 * HZ),
1301 nr->n2count,
1302 nr->n2,
1303 nr->window,
1304 atomic_read(&s->sk_wmem_alloc),
1305 atomic_read(&s->sk_rmem_alloc),
1306 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1307
1308 bh_unlock_sock(s);
1309 }
1310 return 0;
1311}
1312
1313static struct seq_operations nr_info_seqops = {
1314 .start = nr_info_start,
1315 .next = nr_info_next,
1316 .stop = nr_info_stop,
1317 .show = nr_info_show,
1318};
1319
1320static int nr_info_open(struct inode *inode, struct file *file)
1321{
1322 return seq_open(file, &nr_info_seqops);
1323}
1324
1325static struct file_operations nr_info_fops = {
1326 .owner = THIS_MODULE,
1327 .open = nr_info_open,
1328 .read = seq_read,
1329 .llseek = seq_lseek,
1330 .release = seq_release,
1331};
1332#endif /* CONFIG_PROC_FS */
1333
1334static struct net_proto_family nr_family_ops = {
1335 .family = PF_NETROM,
1336 .create = nr_create,
1337 .owner = THIS_MODULE,
1338};
1339
90ddc4f0 1340static const struct proto_ops nr_proto_ops = {
1da177e4
LT		 1341 .family = PF_NETROM,
1342 .owner = THIS_MODULE,
1343 .release = nr_release,
1344 .bind = nr_bind,
1345 .connect = nr_connect,
1346 .socketpair = sock_no_socketpair,
1347 .accept = nr_accept,
1348 .getname = nr_getname,
1349 .poll = datagram_poll,
1350 .ioctl = nr_ioctl,
1351 .listen = nr_listen,
1352 .shutdown = sock_no_shutdown,
1353 .setsockopt = nr_setsockopt,
1354 .getsockopt = nr_getsockopt,
1355 .sendmsg = nr_sendmsg,
1356 .recvmsg = nr_recvmsg,
1357 .mmap = sock_no_mmap,
1358 .sendpage = sock_no_sendpage,
1359};
1360
1361static struct notifier_block nr_dev_notifier = {
1362 .notifier_call = nr_device_event,
1363};
1364
1365static struct net_device **dev_nr;
1366
1367static char banner[] __initdata = KERN_INFO "G4KLX NET/ROM for Linux. Version 0.7 for AX25.037 Linux 2.4\n";
1368
1369static int __init nr_proto_init(void)
1370{
1371 int i;
1372 int rc = proto_register(&nr_proto, 0);
1373
1374 if (rc != 0)
1375 goto out;
1376
1377 if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) {
1378 printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n");
1379 return -1;
1380 }
1381
1382 dev_nr = kmalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1383 if (dev_nr == NULL) {
1384 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n");
1385 return -1;
1386 }
1387
1388 memset(dev_nr, 0x00, nr_ndevs * sizeof(struct net_device *));
1389
1390 for (i = 0; i < nr_ndevs; i++) {
1391 char name[IFNAMSIZ];
1392 struct net_device *dev;
1393
1394 sprintf(name, "nr%d", i);
b88a762b 1395 dev = alloc_netdev(sizeof(struct nr_private), name, nr_setup);
1da177e4
LT		 1396 if (!dev) {
1397 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n");
1398 goto fail;
1399 }
1400
1401 dev->base_addr = i;
1402 if (register_netdev(dev)) {
1403 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n");
1404 free_netdev(dev);
1405 goto fail;
1406 }
1407 dev_nr[i] = dev;
1408 }
1409
1410 if (sock_register(&nr_family_ops)) {
1411 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n");
1412 goto fail;
1413 }
1414
1415 register_netdevice_notifier(&nr_dev_notifier);
1416 printk(banner);
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)