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[AX.25]: Eleminate HZ from AX.25 kernel interfaces
[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>
4fc268d2 14#include <linux/capability.h>
1da177e4
LT		 15#include <linux/errno.h>
16#include <linux/types.h>
17#include <linux/socket.h>
18#include <linux/in.h>
19#include <linux/kernel.h>
20#include <linux/sched.h>
21#include <linux/timer.h>
22#include <linux/string.h>
23#include <linux/sockios.h>
24#include <linux/net.h>
25#include <linux/stat.h>
26#include <net/ax25.h>
27#include <linux/inet.h>
28#include <linux/netdevice.h>
29#include <linux/if_arp.h>
30#include <linux/skbuff.h>
31#include <net/sock.h>
32#include <asm/uaccess.h>
33#include <asm/system.h>
34#include <linux/fcntl.h>
35#include <linux/termios.h> /* For TIOCINQ/OUTQ */
36#include <linux/mm.h>
37#include <linux/interrupt.h>
38#include <linux/notifier.h>
39#include <net/netrom.h>
40#include <linux/proc_fs.h>
41#include <linux/seq_file.h>
42#include <net/ip.h>
c752f073 43#include <net/tcp_states.h>
1da177e4
LT		 44#include <net/arp.h>
45#include <linux/init.h>
46
47static int nr_ndevs = 4;
48
49int sysctl_netrom_default_path_quality = NR_DEFAULT_QUAL;
50int sysctl_netrom_obsolescence_count_initialiser = NR_DEFAULT_OBS;
51int sysctl_netrom_network_ttl_initialiser = NR_DEFAULT_TTL;
52int sysctl_netrom_transport_timeout = NR_DEFAULT_T1;
53int sysctl_netrom_transport_maximum_tries = NR_DEFAULT_N2;
54int sysctl_netrom_transport_acknowledge_delay = NR_DEFAULT_T2;
55int sysctl_netrom_transport_busy_delay = NR_DEFAULT_T4;
56int sysctl_netrom_transport_requested_window_size = NR_DEFAULT_WINDOW;
57int sysctl_netrom_transport_no_activity_timeout = NR_DEFAULT_IDLE;
58int sysctl_netrom_routing_control = NR_DEFAULT_ROUTING;
59int sysctl_netrom_link_fails_count = NR_DEFAULT_FAILS;
e21ce8c7 60int sysctl_netrom_reset_circuit = NR_DEFAULT_RESET;
1da177e4
LT		 61
62static unsigned short circuit = 0x101;
63
64static HLIST_HEAD(nr_list);
65static DEFINE_SPINLOCK(nr_list_lock);
66
90ddc4f0 67static const struct proto_ops nr_proto_ops;
1da177e4
LT		 68
69/*
70 * Socket removal during an interrupt is now safe.
71 */
72static void nr_remove_socket(struct sock *sk)
73{
74 spin_lock_bh(&nr_list_lock);
75 sk_del_node_init(sk);
76 spin_unlock_bh(&nr_list_lock);
77}
78
79/*
80 * Kill all bound sockets on a dropped device.
81 */
82static void nr_kill_by_device(struct net_device *dev)
83{
84 struct sock *s;
85 struct hlist_node *node;
86
87 spin_lock_bh(&nr_list_lock);
88 sk_for_each(s, node, &nr_list)
89 if (nr_sk(s)->device == dev)
90 nr_disconnect(s, ENETUNREACH);
91 spin_unlock_bh(&nr_list_lock);
92}
93
94/*
95 * Handle device status changes.
96 */
97static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr)
98{
99 struct net_device *dev = (struct net_device *)ptr;
100
101 if (event != NETDEV_DOWN)
102 return NOTIFY_DONE;
103
104 nr_kill_by_device(dev);
105 nr_rt_device_down(dev);
106
107 return NOTIFY_DONE;
108}
109
110/*
111 * Add a socket to the bound sockets list.
112 */
113static void nr_insert_socket(struct sock *sk)
114{
115 spin_lock_bh(&nr_list_lock);
116 sk_add_node(sk, &nr_list);
117 spin_unlock_bh(&nr_list_lock);
118}
119
120/*
121 * Find a socket that wants to accept the Connect Request we just
122 * received.
123 */
124static struct sock *nr_find_listener(ax25_address *addr)
125{
126 struct sock *s;
127 struct hlist_node *node;
128
129 spin_lock_bh(&nr_list_lock);
130 sk_for_each(s, node, &nr_list)
131 if (!ax25cmp(&nr_sk(s)->source_addr, addr) &&
132 s->sk_state == TCP_LISTEN) {
133 bh_lock_sock(s);
134 goto found;
135 }
136 s = NULL;
137found:
138 spin_unlock_bh(&nr_list_lock);
139 return s;
140}
141
142/*
143 * Find a connected NET/ROM socket given my circuit IDs.
144 */
145static struct sock *nr_find_socket(unsigned char index, unsigned char id)
146{
147 struct sock *s;
148 struct hlist_node *node;
149
150 spin_lock_bh(&nr_list_lock);
151 sk_for_each(s, node, &nr_list) {
152 struct nr_sock *nr = nr_sk(s);
153
154 if (nr->my_index == index && nr->my_id == id) {
155 bh_lock_sock(s);
156 goto found;
157 }
158 }
159 s = NULL;
160found:
161 spin_unlock_bh(&nr_list_lock);
162 return s;
163}
164
165/*
166 * Find a connected NET/ROM socket given their circuit IDs.
167 */
168static struct sock *nr_find_peer(unsigned char index, unsigned char id,
169 ax25_address *dest)
170{
171 struct sock *s;
172 struct hlist_node *node;
173
174 spin_lock_bh(&nr_list_lock);
175 sk_for_each(s, node, &nr_list) {
176 struct nr_sock *nr = nr_sk(s);
177
178 if (nr->your_index == index && nr->your_id == id &&
179 !ax25cmp(&nr->dest_addr, dest)) {
180 bh_lock_sock(s);
181 goto found;
182 }
183 }
184 s = NULL;
185found:
186 spin_unlock_bh(&nr_list_lock);
187 return s;
188}
189
190/*
191 * Find next free circuit ID.
192 */
193static unsigned short nr_find_next_circuit(void)
194{
195 unsigned short id = circuit;
196 unsigned char i, j;
197 struct sock *sk;
198
199 for (;;) {
200 i = id / 256;
201 j = id % 256;
202
203 if (i != 0 && j != 0) {
204 if ((sk=nr_find_socket(i, j)) == NULL)
205 break;
206 bh_unlock_sock(sk);
207 }
208
209 id++;
210 }
211
212 return id;
213}
214
215/*
216 * Deferred destroy.
217 */
218void nr_destroy_socket(struct sock *);
219
220/*
221 * Handler for deferred kills.
222 */
223static void nr_destroy_timer(unsigned long data)
224{
225 struct sock *sk=(struct sock *)data;
226 bh_lock_sock(sk);
227 sock_hold(sk);
228 nr_destroy_socket(sk);
229 bh_unlock_sock(sk);
230 sock_put(sk);
231}
232
233/*
234 * This is called from user mode and the timers. Thus it protects itself
235 * against interrupt users but doesn't worry about being called during
236 * work. Once it is removed from the queue no interrupt or bottom half
237 * will touch it and we are (fairly 8-) ) safe.
238 */
239void nr_destroy_socket(struct sock *sk)
240{
241 struct sk_buff *skb;
242
243 nr_remove_socket(sk);
244
245 nr_stop_heartbeat(sk);
246 nr_stop_t1timer(sk);
247 nr_stop_t2timer(sk);
248 nr_stop_t4timer(sk);
249 nr_stop_idletimer(sk);
250
251 nr_clear_queues(sk); /* Flush the queues */
252
253 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
254 if (skb->sk != sk) { /* A pending connection */
255 /* Queue the unaccepted socket for death */
256 sock_set_flag(skb->sk, SOCK_DEAD);
257 nr_start_heartbeat(skb->sk);
258 nr_sk(skb->sk)->state = NR_STATE_0;
259 }
260
261 kfree_skb(skb);
262 }
263
264 if (atomic_read(&sk->sk_wmem_alloc) ||
265 atomic_read(&sk->sk_rmem_alloc)) {
266 /* Defer: outstanding buffers */
267 sk->sk_timer.function = nr_destroy_timer;
268 sk->sk_timer.expires = jiffies + 2 * HZ;
269 add_timer(&sk->sk_timer);
270 } else
271 sock_put(sk);
272}
273
274/*
275 * Handling for system calls applied via the various interfaces to a
276 * NET/ROM socket object.
277 */
278
279static int nr_setsockopt(struct socket *sock, int level, int optname,
280 char __user *optval, int optlen)
281{
282 struct sock *sk = sock->sk;
283 struct nr_sock *nr = nr_sk(sk);
284 int opt;
285
286 if (level != SOL_NETROM)
287 return -ENOPROTOOPT;
288
289 if (optlen < sizeof(int))
290 return -EINVAL;
291
292 if (get_user(opt, (int __user *)optval))
293 return -EFAULT;
294
295 switch (optname) {
296 case NETROM_T1:
297 if (opt < 1)
298 return -EINVAL;
299 nr->t1 = opt * HZ;
300 return 0;
301
302 case NETROM_T2:
303 if (opt < 1)
304 return -EINVAL;
305 nr->t2 = opt * HZ;
306 return 0;
307
308 case NETROM_N2:
309 if (opt < 1 || opt > 31)
310 return -EINVAL;
311 nr->n2 = opt;
312 return 0;
313
314 case NETROM_T4:
315 if (opt < 1)
316 return -EINVAL;
317 nr->t4 = opt * HZ;
318 return 0;
319
320 case NETROM_IDLE:
321 if (opt < 0)
322 return -EINVAL;
323 nr->idle = opt * 60 * HZ;
324 return 0;
325
326 default:
327 return -ENOPROTOOPT;
328 }
329}
330
331static int nr_getsockopt(struct socket *sock, int level, int optname,
332 char __user *optval, int __user *optlen)
333{
334 struct sock *sk = sock->sk;
335 struct nr_sock *nr = nr_sk(sk);
336 int val = 0;
337 int len;
338
339 if (level != SOL_NETROM)
340 return -ENOPROTOOPT;
341
342 if (get_user(len, optlen))
343 return -EFAULT;
344
345 if (len < 0)
346 return -EINVAL;
347
348 switch (optname) {
349 case NETROM_T1:
350 val = nr->t1 / HZ;
351 break;
352
353 case NETROM_T2:
354 val = nr->t2 / HZ;
355 break;
356
357 case NETROM_N2:
358 val = nr->n2;
359 break;
360
361 case NETROM_T4:
362 val = nr->t4 / HZ;
363 break;
364
365 case NETROM_IDLE:
366 val = nr->idle / (60 * HZ);
367 break;
368
369 default:
370 return -ENOPROTOOPT;
371 }
372
373 len = min_t(unsigned int, len, sizeof(int));
374
375 if (put_user(len, optlen))
376 return -EFAULT;
377
378 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
379}
380
381static int nr_listen(struct socket *sock, int backlog)
382{
383 struct sock *sk = sock->sk;
384
385 lock_sock(sk);
386 if (sk->sk_state != TCP_LISTEN) {
387 memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN);
388 sk->sk_max_ack_backlog = backlog;
389 sk->sk_state = TCP_LISTEN;
390 release_sock(sk);
391 return 0;
392 }
393 release_sock(sk);
394
395 return -EOPNOTSUPP;
396}
397
398static struct proto nr_proto = {
399 .name = "NETROM",
400 .owner = THIS_MODULE,
401 .obj_size = sizeof(struct nr_sock),
402};
403
404static int nr_create(struct socket *sock, int protocol)
405{
406 struct sock *sk;
407 struct nr_sock *nr;
408
409 if (sock->type != SOCK_SEQPACKET || protocol != 0)
410 return -ESOCKTNOSUPPORT;
411
412 if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, &nr_proto, 1)) == NULL)
413 return -ENOMEM;
414
415 nr = nr_sk(sk);
416
417 sock_init_data(sock, sk);
418
419 sock->ops = &nr_proto_ops;
420 sk->sk_protocol = protocol;
421
422 skb_queue_head_init(&nr->ack_queue);
423 skb_queue_head_init(&nr->reseq_queue);
424 skb_queue_head_init(&nr->frag_queue);
425
426 nr_init_timers(sk);
427
428 nr->t1 = sysctl_netrom_transport_timeout;
429 nr->t2 = sysctl_netrom_transport_acknowledge_delay;
430 nr->n2 = sysctl_netrom_transport_maximum_tries;
431 nr->t4 = sysctl_netrom_transport_busy_delay;
432 nr->idle = sysctl_netrom_transport_no_activity_timeout;
433 nr->window = sysctl_netrom_transport_requested_window_size;
434
435 nr->bpqext = 1;
436 nr->state = NR_STATE_0;
437
438 return 0;
439}
440
441static struct sock *nr_make_new(struct sock *osk)
442{
443 struct sock *sk;
444 struct nr_sock *nr, *onr;
445
446 if (osk->sk_type != SOCK_SEQPACKET)
447 return NULL;
448
449 if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, osk->sk_prot, 1)) == NULL)
450 return NULL;
451
452 nr = nr_sk(sk);
453
454 sock_init_data(NULL, sk);
455
456 sk->sk_type = osk->sk_type;
457 sk->sk_socket = osk->sk_socket;
458 sk->sk_priority = osk->sk_priority;
459 sk->sk_protocol = osk->sk_protocol;
460 sk->sk_rcvbuf = osk->sk_rcvbuf;
461 sk->sk_sndbuf = osk->sk_sndbuf;
462 sk->sk_state = TCP_ESTABLISHED;
463 sk->sk_sleep = osk->sk_sleep;
53b924b3 464 sock_copy_flags(sk, osk);
1da177e4
LT		 465
466 skb_queue_head_init(&nr->ack_queue);
467 skb_queue_head_init(&nr->reseq_queue);
468 skb_queue_head_init(&nr->frag_queue);
469
470 nr_init_timers(sk);
471
472 onr = nr_sk(osk);
473
474 nr->t1 = onr->t1;
475 nr->t2 = onr->t2;
476 nr->n2 = onr->n2;
477 nr->t4 = onr->t4;
478 nr->idle = onr->idle;
479 nr->window = onr->window;
480
481 nr->device = onr->device;
482 nr->bpqext = onr->bpqext;
483
484 return sk;
485}
486
487static int nr_release(struct socket *sock)
488{
489 struct sock *sk = sock->sk;
490 struct nr_sock *nr;
491
492 if (sk == NULL) return 0;
493
494 sock_hold(sk);
495 lock_sock(sk);
496 nr = nr_sk(sk);
497
498 switch (nr->state) {
499 case NR_STATE_0:
500 case NR_STATE_1:
501 case NR_STATE_2:
502 nr_disconnect(sk, 0);
503 nr_destroy_socket(sk);
504 break;
505
506 case NR_STATE_3:
507 nr_clear_queues(sk);
508 nr->n2count = 0;
509 nr_write_internal(sk, NR_DISCREQ);
510 nr_start_t1timer(sk);
511 nr_stop_t2timer(sk);
512 nr_stop_t4timer(sk);
513 nr_stop_idletimer(sk);
514 nr->state = NR_STATE_2;
515 sk->sk_state = TCP_CLOSE;
516 sk->sk_shutdown |= SEND_SHUTDOWN;
517 sk->sk_state_change(sk);
518 sock_orphan(sk);
519 sock_set_flag(sk, SOCK_DESTROY);
520 sk->sk_socket = NULL;
521 break;
522
523 default:
524 sk->sk_socket = NULL;
525 break;
526 }
527
528 sock->sk = NULL;
529 release_sock(sk);
530 sock_put(sk);
531
532 return 0;
533}
534
535static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
536{
537 struct sock *sk = sock->sk;
538 struct nr_sock *nr = nr_sk(sk);
539 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
540 struct net_device *dev;
01d7dd0e
RB		 541 ax25_uid_assoc *user;
542 ax25_address *source;
1da177e4
LT		 543
544 lock_sock(sk);
545 if (!sock_flag(sk, SOCK_ZAPPED)) {
546 release_sock(sk);
547 return -EINVAL;
548 }
549 if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) {
550 release_sock(sk);
551 return -EINVAL;
552 }
553 if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) {
554 release_sock(sk);
555 return -EINVAL;
556 }
557 if (addr->fsa_ax25.sax25_family != AF_NETROM) {
558 release_sock(sk);
559 return -EINVAL;
560 }
561 if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) {
562 SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n");
563 release_sock(sk);
564 return -EADDRNOTAVAIL;
565 }
566
567 /*
568 * Only the super user can set an arbitrary user callsign.
569 */
570 if (addr->fsa_ax25.sax25_ndigis == 1) {
571 if (!capable(CAP_NET_BIND_SERVICE)) {
572 dev_put(dev);
573 release_sock(sk);
574 return -EACCES;
575 }
576 nr->user_addr = addr->fsa_digipeater[0];
577 nr->source_addr = addr->fsa_ax25.sax25_call;
578 } else {
579 source = &addr->fsa_ax25.sax25_call;
580
01d7dd0e
RB		 581 user = ax25_findbyuid(current->euid);
582 if (user) {
583 nr->user_addr = user->call;
584 ax25_uid_put(user);
585 } else {
1da177e4
LT		 586 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
587 release_sock(sk);
588 dev_put(dev);
589 return -EPERM;
590 }
01d7dd0e 591 nr->user_addr = *source;
1da177e4
LT		 592 }
593
1da177e4
LT		 594 nr->source_addr = *source;
595 }
596
597 nr->device = dev;
598 nr_insert_socket(sk);
599
600 sock_reset_flag(sk, SOCK_ZAPPED);
601 dev_put(dev);
602 release_sock(sk);
603 SOCK_DEBUG(sk, "NET/ROM: socket is bound\n");
604 return 0;
605}
606
607static int nr_connect(struct socket *sock, struct sockaddr *uaddr,
608 int addr_len, int flags)
609{
610 struct sock *sk = sock->sk;
611 struct nr_sock *nr = nr_sk(sk);
612 struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr;
01d7dd0e
RB		 613 ax25_address *source = NULL;
614 ax25_uid_assoc *user;
1da177e4
LT		 615 struct net_device *dev;
616
617 lock_sock(sk);
618 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
619 sock->state = SS_CONNECTED;
620 release_sock(sk);
621 return 0; /* Connect completed during a ERESTARTSYS event */
622 }
623
624 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
625 sock->state = SS_UNCONNECTED;
626 release_sock(sk);
627 return -ECONNREFUSED;
628 }
629
630 if (sk->sk_state == TCP_ESTABLISHED) {
631 release_sock(sk);
632 return -EISCONN; /* No reconnect on a seqpacket socket */
633 }
634
635 sk->sk_state = TCP_CLOSE;
636 sock->state = SS_UNCONNECTED;
637
638 if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) {
639 release_sock(sk);
640 return -EINVAL;
641 }
642 if (addr->sax25_family != AF_NETROM) {
643 release_sock(sk);
644 return -EINVAL;
645 }
646 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
647 sock_reset_flag(sk, SOCK_ZAPPED);
648
649 if ((dev = nr_dev_first()) == NULL) {
650 release_sock(sk);
651 return -ENETUNREACH;
652 }
653 source = (ax25_address *)dev->dev_addr;
654
01d7dd0e
RB		 655 user = ax25_findbyuid(current->euid);
656 if (user) {
657 nr->user_addr = user->call;
658 ax25_uid_put(user);
659 } else {
1da177e4
LT		 660 if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) {
661 dev_put(dev);
662 release_sock(sk);
663 return -EPERM;
664 }
01d7dd0e 665 nr->user_addr = *source;
1da177e4
LT		 666 }
667
1da177e4
LT		 668 nr->source_addr = *source;
669 nr->device = dev;
670
671 dev_put(dev);
672 nr_insert_socket(sk); /* Finish the bind */
673 }
674
675 nr->dest_addr = addr->sax25_call;
676
677 release_sock(sk);
678 circuit = nr_find_next_circuit();
679 lock_sock(sk);
680
681 nr->my_index = circuit / 256;
682 nr->my_id = circuit % 256;
683
684 circuit++;
685
686 /* Move to connecting socket, start sending Connect Requests */
687 sock->state = SS_CONNECTING;
688 sk->sk_state = TCP_SYN_SENT;
689
690 nr_establish_data_link(sk);
691
692 nr->state = NR_STATE_1;
693
694 nr_start_heartbeat(sk);
695
696 /* Now the loop */
697 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
698 release_sock(sk);
699 return -EINPROGRESS;
700 }
701
702 /*
703 * A Connect Ack with Choke or timeout or failed routing will go to
704 * closed.
705 */
706 if (sk->sk_state == TCP_SYN_SENT) {
707 struct task_struct *tsk = current;
708 DECLARE_WAITQUEUE(wait, tsk);
709
710 add_wait_queue(sk->sk_sleep, &wait);
711 for (;;) {
712 set_current_state(TASK_INTERRUPTIBLE);
713 if (sk->sk_state != TCP_SYN_SENT)
714 break;
715 release_sock(sk);
716 if (!signal_pending(tsk)) {
717 schedule();
718 lock_sock(sk);
719 continue;
720 }
721 current->state = TASK_RUNNING;
722 remove_wait_queue(sk->sk_sleep, &wait);
723 return -ERESTARTSYS;
724 }
725 current->state = TASK_RUNNING;
726 remove_wait_queue(sk->sk_sleep, &wait);
727 }
728
729 if (sk->sk_state != TCP_ESTABLISHED) {
730 sock->state = SS_UNCONNECTED;
731 release_sock(sk);
732 return sock_error(sk); /* Always set at this point */
733 }
734
735 sock->state = SS_CONNECTED;
736 release_sock(sk);
737
738 return 0;
739}
740
741static int nr_accept(struct socket *sock, struct socket *newsock, int flags)
742{
743 struct task_struct *tsk = current;
744 DECLARE_WAITQUEUE(wait, tsk);
745 struct sk_buff *skb;
746 struct sock *newsk;
747 struct sock *sk;
748 int err = 0;
749
750 if ((sk = sock->sk) == NULL)
751 return -EINVAL;
752
753 lock_sock(sk);
754 if (sk->sk_type != SOCK_SEQPACKET) {
755 err = -EOPNOTSUPP;
756 goto out;
757 }
758
759 if (sk->sk_state != TCP_LISTEN) {
760 err = -EINVAL;
761 goto out;
762 }
763
764 /*
765 * The write queue this time is holding sockets ready to use
766 * hooked into the SABM we saved
767 */
768 add_wait_queue(sk->sk_sleep, &wait);
769 for (;;) {
770 skb = skb_dequeue(&sk->sk_receive_queue);
771 if (skb)
772 break;
773
774 current->state = TASK_INTERRUPTIBLE;
775 release_sock(sk);
776 if (flags & O_NONBLOCK) {
777 current->state = TASK_RUNNING;
778 remove_wait_queue(sk->sk_sleep, &wait);
779 return -EWOULDBLOCK;
780 }
781 if (!signal_pending(tsk)) {
782 schedule();
783 lock_sock(sk);
784 continue;
785 }
786 current->state = TASK_RUNNING;
787 remove_wait_queue(sk->sk_sleep, &wait);
788 return -ERESTARTSYS;
789 }
790 current->state = TASK_RUNNING;
791 remove_wait_queue(sk->sk_sleep, &wait);
792
793 newsk = skb->sk;
794 newsk->sk_socket = newsock;
795 newsk->sk_sleep = &newsock->wait;
796
797 /* Now attach up the new socket */
798 kfree_skb(skb);
799 sk->sk_ack_backlog--;
800 newsock->sk = newsk;
801
802out:
803 release_sock(sk);
804 return err;
805}
806
807static int nr_getname(struct socket *sock, struct sockaddr *uaddr,
808 int *uaddr_len, int peer)
809{
810 struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr;
811 struct sock *sk = sock->sk;
812 struct nr_sock *nr = nr_sk(sk);
813
814 lock_sock(sk);
815 if (peer != 0) {
816 if (sk->sk_state != TCP_ESTABLISHED) {
817 release_sock(sk);
818 return -ENOTCONN;
819 }
820 sax->fsa_ax25.sax25_family = AF_NETROM;
821 sax->fsa_ax25.sax25_ndigis = 1;
822 sax->fsa_ax25.sax25_call = nr->user_addr;
823 sax->fsa_digipeater[0] = nr->dest_addr;
824 *uaddr_len = sizeof(struct full_sockaddr_ax25);
825 } else {
826 sax->fsa_ax25.sax25_family = AF_NETROM;
827 sax->fsa_ax25.sax25_ndigis = 0;
828 sax->fsa_ax25.sax25_call = nr->source_addr;
829 *uaddr_len = sizeof(struct sockaddr_ax25);
830 }
831 release_sock(sk);
832
833 return 0;
834}
835
836int nr_rx_frame(struct sk_buff *skb, struct net_device *dev)
837{
838 struct sock *sk;
839 struct sock *make;
840 struct nr_sock *nr_make;
841 ax25_address *src, *dest, *user;
842 unsigned short circuit_index, circuit_id;
843 unsigned short peer_circuit_index, peer_circuit_id;
844 unsigned short frametype, flags, window, timeout;
845 int ret;
846
847 skb->sk = NULL; /* Initially we don't know who it's for */
848
849 /*
850 * skb->data points to the netrom frame start
851 */
852
853 src = (ax25_address *)(skb->data + 0);
854 dest = (ax25_address *)(skb->data + 7);
855
856 circuit_index = skb->data[15];
857 circuit_id = skb->data[16];
858 peer_circuit_index = skb->data[17];
859 peer_circuit_id = skb->data[18];
860 frametype = skb->data[19] & 0x0F;
861 flags = skb->data[19] & 0xF0;
862
1da177e4
LT		 863 /*
864 * Check for an incoming IP over NET/ROM frame.
865 */
98a82feb
RB		 866 if (frametype == NR_PROTOEXT &&
867 circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) {
1da177e4
LT		 868 skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
869 skb->h.raw = skb->data;
870
871 return nr_rx_ip(skb, dev);
872 }
1da177e4
LT		 873
874 /*
875 * Find an existing socket connection, based on circuit ID, if it's
876 * a Connect Request base it on their circuit ID.
877 *
878 * Circuit ID 0/0 is not valid but it could still be a "reset" for a
879 * circuit that no longer exists at the other end ...
880 */
881
882 sk = NULL;
883
884 if (circuit_index == 0 && circuit_id == 0) {
885 if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG)
886 sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src);
887 } else {
888 if (frametype == NR_CONNREQ)
889 sk = nr_find_peer(circuit_index, circuit_id, src);
890 else
891 sk = nr_find_socket(circuit_index, circuit_id);
892 }
893
894 if (sk != NULL) {
895 skb->h.raw = skb->data;
896
897 if (frametype == NR_CONNACK && skb->len == 22)
898 nr_sk(sk)->bpqext = 1;
899 else
900 nr_sk(sk)->bpqext = 0;
901
902 ret = nr_process_rx_frame(sk, skb);
903 bh_unlock_sock(sk);
904 return ret;
905 }
906
907 /*
908 * Now it should be a CONNREQ.
909 */
910 if (frametype != NR_CONNREQ) {
911 /*
912 * Here it would be nice to be able to send a reset but
e21ce8c7
RB		 913 * NET/ROM doesn't have one. We've tried to extend the protocol
914 * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that
915 * apparently kills BPQ boxes... :-(
916 * So now we try to follow the established behaviour of
917 * G8PZT's Xrouter which is sending packets with command type 7
918 * as an extension of the protocol.
1da177e4 919 */
e21ce8c7
RB		 920 if (sysctl_netrom_reset_circuit &&
921 (frametype != NR_RESET || flags != 0))
922 nr_transmit_reset(skb, 1);
923
1da177e4
LT		 924 return 0;
925 }
926
927 sk = nr_find_listener(dest);
928
929 user = (ax25_address *)(skb->data + 21);
930
931 if (sk == NULL || sk_acceptq_is_full(sk) ||
932 (make = nr_make_new(sk)) == NULL) {
933 nr_transmit_refusal(skb, 0);
934 if (sk)
935 bh_unlock_sock(sk);
936 return 0;
937 }
938
939 window = skb->data[20];
940
941 skb->sk = make;
942 make->sk_state = TCP_ESTABLISHED;
943
944 /* Fill in his circuit details */
945 nr_make = nr_sk(make);
946 nr_make->source_addr = *dest;
947 nr_make->dest_addr = *src;
948 nr_make->user_addr = *user;
949
950 nr_make->your_index = circuit_index;
951 nr_make->your_id = circuit_id;
952
953 bh_unlock_sock(sk);
954 circuit = nr_find_next_circuit();
955 bh_lock_sock(sk);
956
957 nr_make->my_index = circuit / 256;
958 nr_make->my_id = circuit % 256;
959
960 circuit++;
961
962 /* Window negotiation */
963 if (window < nr_make->window)
964 nr_make->window = window;
965
966 /* L4 timeout negotiation */
967 if (skb->len == 37) {
968 timeout = skb->data[36] * 256 + skb->data[35];
969 if (timeout * HZ < nr_make->t1)
970 nr_make->t1 = timeout * HZ;
971 nr_make->bpqext = 1;
972 } else {
973 nr_make->bpqext = 0;
974 }
975
976 nr_write_internal(make, NR_CONNACK);
977
978 nr_make->condition = 0x00;
979 nr_make->vs = 0;
980 nr_make->va = 0;
981 nr_make->vr = 0;
982 nr_make->vl = 0;
983 nr_make->state = NR_STATE_3;
984 sk->sk_ack_backlog++;
985
986 nr_insert_socket(make);
987
988 skb_queue_head(&sk->sk_receive_queue, skb);
989
990 nr_start_heartbeat(make);
991 nr_start_idletimer(make);
992
993 if (!sock_flag(sk, SOCK_DEAD))
994 sk->sk_data_ready(sk, skb->len);
995
996 bh_unlock_sock(sk);
997 return 1;
998}
999
1000static int nr_sendmsg(struct kiocb *iocb, struct socket *sock,
1001 struct msghdr *msg, size_t len)
1002{
1003 struct sock *sk = sock->sk;
1004 struct nr_sock *nr = nr_sk(sk);
1005 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1006 int err;
1007 struct sockaddr_ax25 sax;
1008 struct sk_buff *skb;
1009 unsigned char *asmptr;
1010 int size;
1011
1012 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1013 return -EINVAL;
1014
1015 lock_sock(sk);
1016 if (sock_flag(sk, SOCK_ZAPPED)) {
1017 err = -EADDRNOTAVAIL;
1018 goto out;
1019 }
1020
1021 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1022 send_sig(SIGPIPE, current, 0);
1023 err = -EPIPE;
1024 goto out;
1025 }
1026
1027 if (nr->device == NULL) {
1028 err = -ENETUNREACH;
1029 goto out;
1030 }
1031
1032 if (usax) {
1033 if (msg->msg_namelen < sizeof(sax)) {
1034 err = -EINVAL;
1035 goto out;
1036 }
1037 sax = *usax;
1038 if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) {
1039 err = -EISCONN;
1040 goto out;
1041 }
1042 if (sax.sax25_family != AF_NETROM) {
1043 err = -EINVAL;
1044 goto out;
1045 }
1046 } else {
1047 if (sk->sk_state != TCP_ESTABLISHED) {
1048 err = -ENOTCONN;
1049 goto out;
1050 }
1051 sax.sax25_family = AF_NETROM;
1052 sax.sax25_call = nr->dest_addr;
1053 }
1054
1055 SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n");
1056
1057 /* Build a packet */
1058 SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n");
1059 size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN;
1060
1061 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1062 goto out;
1063
1064 skb_reserve(skb, size - len);
1065
1066 /*
1067 * Push down the NET/ROM header
1068 */
1069
1070 asmptr = skb_push(skb, NR_TRANSPORT_LEN);
1071 SOCK_DEBUG(sk, "Building NET/ROM Header.\n");
1072
1073 /* Build a NET/ROM Transport header */
1074
1075 *asmptr++ = nr->your_index;
1076 *asmptr++ = nr->your_id;
1077 *asmptr++ = 0; /* To be filled in later */
1078 *asmptr++ = 0; /* Ditto */
1079 *asmptr++ = NR_INFO;
1080 SOCK_DEBUG(sk, "Built header.\n");
1081
1082 /*
1083 * Put the data on the end
1084 */
1085
1086 skb->h.raw = skb_put(skb, len);
1087
1088 asmptr = skb->h.raw;
1089 SOCK_DEBUG(sk, "NET/ROM: Appending user data\n");
1090
1091 /* User data follows immediately after the NET/ROM transport header */
1092 if (memcpy_fromiovec(asmptr, msg->msg_iov, len)) {
1093 kfree_skb(skb);
1094 err = -EFAULT;
1095 goto out;
1096 }
1097
1098 SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n");
1099
1100 if (sk->sk_state != TCP_ESTABLISHED) {
1101 kfree_skb(skb);
1102 err = -ENOTCONN;
1103 goto out;
1104 }
1105
1106 nr_output(sk, skb); /* Shove it onto the queue */
1107
1108 err = len;
1109out:
1110 release_sock(sk);
1111 return err;
1112}
1113
1114static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
1115 struct msghdr *msg, size_t size, int flags)
1116{
1117 struct sock *sk = sock->sk;
1118 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1119 size_t copied;
1120 struct sk_buff *skb;
1121 int er;
1122
1123 /*
1124 * This works for seqpacket too. The receiver has ordered the queue for
1125 * us! We do one quick check first though
1126 */
1127
1128 lock_sock(sk);
1129 if (sk->sk_state != TCP_ESTABLISHED) {
1130 release_sock(sk);
1131 return -ENOTCONN;
1132 }
1133
1134 /* Now we can treat all alike */
1135 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) {
1136 release_sock(sk);
1137 return er;
1138 }
1139
1140 skb->h.raw = skb->data;
1141 copied = skb->len;
1142
1143 if (copied > size) {
1144 copied = size;
1145 msg->msg_flags |= MSG_TRUNC;
1146 }
1147
1148 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1149
1150 if (sax != NULL) {
1151 sax->sax25_family = AF_NETROM;
1152 memcpy(sax->sax25_call.ax25_call, skb->data + 7, AX25_ADDR_LEN);
1153 }
1154
1155 msg->msg_namelen = sizeof(*sax);
1156
1157 skb_free_datagram(sk, skb);
1158
1159 release_sock(sk);
1160 return copied;
1161}
1162
1163
1164static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1165{
1166 struct sock *sk = sock->sk;
1167 void __user *argp = (void __user *)arg;
1168 int ret;
1169
1da177e4
LT		 1170 switch (cmd) {
1171 case TIOCOUTQ: {
1172 long amount;
5ff7630e
CH		 1173
1174 lock_sock(sk);
1da177e4
LT		 1175 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1176 if (amount < 0)
1177 amount = 0;
1178 release_sock(sk);
1179 return put_user(amount, (int __user *)argp);
1180 }
1181
1182 case TIOCINQ: {
1183 struct sk_buff *skb;
1184 long amount = 0L;
5ff7630e
CH		 1185
1186 lock_sock(sk);
1da177e4
LT		 1187 /* These two are safe on a single CPU system as only user tasks fiddle here */
1188 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1189 amount = skb->len;
1190 release_sock(sk);
1191 return put_user(amount, (int __user *)argp);
1192 }
1193
1194 case SIOCGSTAMP:
5ff7630e 1195 lock_sock(sk);
9b37ee75 1196 ret = sock_get_timestamp(sk, argp);
1da177e4
LT		 1197 release_sock(sk);
1198 return ret;
1199
1200 case SIOCGIFADDR:
1201 case SIOCSIFADDR:
1202 case SIOCGIFDSTADDR:
1203 case SIOCSIFDSTADDR:
1204 case SIOCGIFBRDADDR:
1205 case SIOCSIFBRDADDR:
1206 case SIOCGIFNETMASK:
1207 case SIOCSIFNETMASK:
1208 case SIOCGIFMETRIC:
1209 case SIOCSIFMETRIC:
1da177e4
LT		 1210 return -EINVAL;
1211
1212 case SIOCADDRT:
1213 case SIOCDELRT:
1214 case SIOCNRDECOBS:
1da177e4
LT		 1215 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1216 return nr_rt_ioctl(cmd, argp);
1217
1218 default:
b5e5fa5e 1219 return -ENOIOCTLCMD;
1da177e4 1220 }
1da177e4
LT		 1221
1222 return 0;
1223}
1224
1225#ifdef CONFIG_PROC_FS
1226
1227static void *nr_info_start(struct seq_file *seq, loff_t *pos)
1228{
1229 struct sock *s;
1230 struct hlist_node *node;
1231 int i = 1;
1232
1233 spin_lock_bh(&nr_list_lock);
1234 if (*pos == 0)
1235 return SEQ_START_TOKEN;
1236
1237 sk_for_each(s, node, &nr_list) {
1238 if (i == *pos)
1239 return s;
1240 ++i;
1241 }
1242 return NULL;
1243}
1244
1245static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos)
1246{
1247 ++*pos;
1248
1249 return (v == SEQ_START_TOKEN) ? sk_head(&nr_list)
1250 : sk_next((struct sock *)v);
1251}
1252
1253static void nr_info_stop(struct seq_file *seq, void *v)
1254{
1255 spin_unlock_bh(&nr_list_lock);
1256}
1257
1258static int nr_info_show(struct seq_file *seq, void *v)
1259{
1260 struct sock *s = v;
1261 struct net_device *dev;
1262 struct nr_sock *nr;
1263 const char *devname;
f75268cd 1264 char buf[11];
1da177e4
LT		 1265
1266 if (v == SEQ_START_TOKEN)
1267 seq_puts(seq,
1268"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");
1269
1270 else {
1271
1272 bh_lock_sock(s);
1273 nr = nr_sk(s);
1274
1275 if ((dev = nr->device) == NULL)
1276 devname = "???";
1277 else
1278 devname = dev->name;
1279
f75268cd
RB		 1280 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->user_addr));
1281 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->dest_addr));
1da177e4
LT		 1282 seq_printf(seq,
1283"%-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 1284 ax2asc(buf, &nr->source_addr),
1da177e4
LT		 1285 devname,
1286 nr->my_index,
1287 nr->my_id,
1288 nr->your_index,
1289 nr->your_id,
1290 nr->state,
1291 nr->vs,
1292 nr->vr,
1293 nr->va,
1294 ax25_display_timer(&nr->t1timer) / HZ,
1295 nr->t1 / HZ,
1296 ax25_display_timer(&nr->t2timer) / HZ,
1297 nr->t2 / HZ,
1298 ax25_display_timer(&nr->t4timer) / HZ,
1299 nr->t4 / HZ,
1300 ax25_display_timer(&nr->idletimer) / (60 * HZ),
1301 nr->idle / (60 * HZ),
1302 nr->n2count,
1303 nr->n2,
1304 nr->window,
1305 atomic_read(&s->sk_wmem_alloc),
1306 atomic_read(&s->sk_rmem_alloc),
1307 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1308
1309 bh_unlock_sock(s);
1310 }
1311 return 0;
1312}
1313
1314static struct seq_operations nr_info_seqops = {
1315 .start = nr_info_start,
1316 .next = nr_info_next,
1317 .stop = nr_info_stop,
1318 .show = nr_info_show,
1319};
1320
1321static int nr_info_open(struct inode *inode, struct file *file)
1322{
1323 return seq_open(file, &nr_info_seqops);
1324}
1325
1326static struct file_operations nr_info_fops = {
1327 .owner = THIS_MODULE,
1328 .open = nr_info_open,
1329 .read = seq_read,
1330 .llseek = seq_lseek,
1331 .release = seq_release,
1332};
1333#endif /* CONFIG_PROC_FS */
1334
1335static struct net_proto_family nr_family_ops = {
1336 .family = PF_NETROM,
1337 .create = nr_create,
1338 .owner = THIS_MODULE,
1339};
1340
90ddc4f0 1341static const struct proto_ops nr_proto_ops = {
1da177e4
LT		 1342 .family = PF_NETROM,
1343 .owner = THIS_MODULE,
1344 .release = nr_release,
1345 .bind = nr_bind,
1346 .connect = nr_connect,
1347 .socketpair = sock_no_socketpair,
1348 .accept = nr_accept,
1349 .getname = nr_getname,
1350 .poll = datagram_poll,
1351 .ioctl = nr_ioctl,
1352 .listen = nr_listen,
1353 .shutdown = sock_no_shutdown,
1354 .setsockopt = nr_setsockopt,
1355 .getsockopt = nr_getsockopt,
1356 .sendmsg = nr_sendmsg,
1357 .recvmsg = nr_recvmsg,
1358 .mmap = sock_no_mmap,
1359 .sendpage = sock_no_sendpage,
1360};
1361
1362static struct notifier_block nr_dev_notifier = {
1363 .notifier_call = nr_device_event,
1364};
1365
1366static struct net_device **dev_nr;
1367
1368static char banner[] __initdata = KERN_INFO "G4KLX NET/ROM for Linux. Version 0.7 for AX25.037 Linux 2.4\n";
1369
1370static int __init nr_proto_init(void)
1371{
1372 int i;
1373 int rc = proto_register(&nr_proto, 0);
1374
1375 if (rc != 0)
1376 goto out;
1377
1378 if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) {
1379 printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n");
1380 return -1;
1381 }
1382
1383 dev_nr = kmalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1384 if (dev_nr == NULL) {
1385 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n");
1386 return -1;
1387 }
1388
1389 memset(dev_nr, 0x00, nr_ndevs * sizeof(struct net_device *));
1390
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);
1417 printk(banner);
1418
1419 ax25_protocol_register(AX25_P_NETROM, nr_route_frame);
1420 ax25_linkfail_register(nr_link_failed);
1421
1422#ifdef CONFIG_SYSCTL
1423 nr_register_sysctl();
1424#endif
1425
1426 nr_loopback_init();
1427
1428 proc_net_fops_create("nr", S_IRUGO, &nr_info_fops);
1429 proc_net_fops_create("nr_neigh", S_IRUGO, &nr_neigh_fops);
1430 proc_net_fops_create("nr_nodes", S_IRUGO, &nr_nodes_fops);
1431out:
1432 return rc;
1433fail:
1434 while (--i >= 0) {
1435 unregister_netdev(dev_nr[i]);
1436 free_netdev(dev_nr[i]);
1437 }
1438 kfree(dev_nr);
1439 proto_unregister(&nr_proto);
1440 rc = -1;
1441 goto out;
1442}
1443
1444module_init(nr_proto_init);
1445
1446module_param(nr_ndevs, int, 0);
1447MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices");
1448
1449MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1450MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol");
1451MODULE_LICENSE("GPL");
1452MODULE_ALIAS_NETPROTO(PF_NETROM);
1453
1454static void __exit nr_exit(void)
1455{
1456 int i;
1457
1458 proc_net_remove("nr");
1459 proc_net_remove("nr_neigh");
1460 proc_net_remove("nr_nodes");
1461 nr_loopback_clear();
1462
1463 nr_rt_free();
1464
1465#ifdef CONFIG_SYSCTL
1466 nr_unregister_sysctl();
1467#endif
1468
1469 ax25_linkfail_release(nr_link_failed);
1470 ax25_protocol_release(AX25_P_NETROM);
1471
1472 unregister_netdevice_notifier(&nr_dev_notifier);
1473
1474 sock_unregister(PF_NETROM);
1475
1476 for (i = 0; i < nr_ndevs; i++) {
1477 struct net_device *dev = dev_nr[i];
1478 if (dev) {
1479 unregister_netdev(dev);
1480 free_netdev(dev);
1481 }
1482 }
1483
1484 kfree(dev_nr);
1485 proto_unregister(&nr_proto);
1486}
1487module_exit(nr_exit);
kernel source for telekom puls (alcatel/mediatek)