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ACPI: thinkpad-acpi: preserve radio state across shutdown
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / netrom / af_netrom.c
blobad72bde4f94ed7b7f476b855776cca0479ea6a00
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/module.h>
12 #include <linux/moduleparam.h>
13 #include <linux/capability.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/net_namespace.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>
43 #include <net/tcp_states.h>
44 #include <net/arp.h>
45 #include <linux/init.h>
46
47 static int nr_ndevs = 4;
48
49 int sysctl_netrom_default_path_quality = NR_DEFAULT_QUAL;
50 int sysctl_netrom_obsolescence_count_initialiser = NR_DEFAULT_OBS;
51 int sysctl_netrom_network_ttl_initialiser = NR_DEFAULT_TTL;
52 int sysctl_netrom_transport_timeout = NR_DEFAULT_T1;
53 int sysctl_netrom_transport_maximum_tries = NR_DEFAULT_N2;
54 int sysctl_netrom_transport_acknowledge_delay = NR_DEFAULT_T2;
55 int sysctl_netrom_transport_busy_delay = NR_DEFAULT_T4;
56 int sysctl_netrom_transport_requested_window_size = NR_DEFAULT_WINDOW;
57 int sysctl_netrom_transport_no_activity_timeout = NR_DEFAULT_IDLE;
58 int sysctl_netrom_routing_control = NR_DEFAULT_ROUTING;
59 int sysctl_netrom_link_fails_count = NR_DEFAULT_FAILS;
60 int sysctl_netrom_reset_circuit = NR_DEFAULT_RESET;
61
62 static unsigned short circuit = 0x101;
63
64 static HLIST_HEAD(nr_list);
65 static DEFINE_SPINLOCK(nr_list_lock);
66
67 static const struct proto_ops nr_proto_ops;
68
69 /*
70 * NETROM network devices are virtual network devices encapsulating NETROM
71 * frames into AX.25 which will be sent through an AX.25 device, so form a
72 * special "super class" of normal net devices; split their locks off into a
73 * separate class since they always nest.
74 */
75 static struct lock_class_key nr_netdev_xmit_lock_key;
76 static struct lock_class_key nr_netdev_addr_lock_key;
77
78 static void nr_set_lockdep_one(struct net_device *dev,
79 struct netdev_queue *txq,
80 void *_unused)
81 {
82 lockdep_set_class(&txq->_xmit_lock, &nr_netdev_xmit_lock_key);
83 }
84
85 static void nr_set_lockdep_key(struct net_device *dev)
86 {
87 lockdep_set_class(&dev->addr_list_lock, &nr_netdev_addr_lock_key);
88 netdev_for_each_tx_queue(dev, nr_set_lockdep_one, NULL);
89 }
90
91 /*
92 * Socket removal during an interrupt is now safe.
93 */
94 static void nr_remove_socket(struct sock *sk)
95 {
96 spin_lock_bh(&nr_list_lock);
97 sk_del_node_init(sk);
98 spin_unlock_bh(&nr_list_lock);
99 }
100
101 /*
102 * Kill all bound sockets on a dropped device.
103 */
104 static void nr_kill_by_device(struct net_device *dev)
105 {
106 struct sock *s;
107 struct hlist_node *node;
108
109 spin_lock_bh(&nr_list_lock);
110 sk_for_each(s, node, &nr_list)
111 if (nr_sk(s)->device == dev)
112 nr_disconnect(s, ENETUNREACH);
113 spin_unlock_bh(&nr_list_lock);
114 }
115
116 /*
117 * Handle device status changes.
118 */
119 static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr)
120 {
121 struct net_device *dev = (struct net_device *)ptr;
122
123 if (!net_eq(dev_net(dev), &init_net))
124 return NOTIFY_DONE;
125
126 if (event != NETDEV_DOWN)
127 return NOTIFY_DONE;
128
129 nr_kill_by_device(dev);
130 nr_rt_device_down(dev);
131
132 return NOTIFY_DONE;
133 }
134
135 /*
136 * Add a socket to the bound sockets list.
137 */
138 static void nr_insert_socket(struct sock *sk)
139 {
140 spin_lock_bh(&nr_list_lock);
141 sk_add_node(sk, &nr_list);
142 spin_unlock_bh(&nr_list_lock);
143 }
144
145 /*
146 * Find a socket that wants to accept the Connect Request we just
147 * received.
148 */
149 static struct sock *nr_find_listener(ax25_address *addr)
150 {
151 struct sock *s;
152 struct hlist_node *node;
153
154 spin_lock_bh(&nr_list_lock);
155 sk_for_each(s, node, &nr_list)
156 if (!ax25cmp(&nr_sk(s)->source_addr, addr) &&
157 s->sk_state == TCP_LISTEN) {
158 bh_lock_sock(s);
159 goto found;
160 }
161 s = NULL;
162 found:
163 spin_unlock_bh(&nr_list_lock);
164 return s;
165 }
166
167 /*
168 * Find a connected NET/ROM socket given my circuit IDs.
169 */
170 static struct sock *nr_find_socket(unsigned char index, unsigned char id)
171 {
172 struct sock *s;
173 struct hlist_node *node;
174
175 spin_lock_bh(&nr_list_lock);
176 sk_for_each(s, node, &nr_list) {
177 struct nr_sock *nr = nr_sk(s);
178
179 if (nr->my_index == index && nr->my_id == id) {
180 bh_lock_sock(s);
181 goto found;
182 }
183 }
184 s = NULL;
185 found:
186 spin_unlock_bh(&nr_list_lock);
187 return s;
188 }
189
190 /*
191 * Find a connected NET/ROM socket given their circuit IDs.
192 */
193 static struct sock *nr_find_peer(unsigned char index, unsigned char id,
194 ax25_address *dest)
195 {
196 struct sock *s;
197 struct hlist_node *node;
198
199 spin_lock_bh(&nr_list_lock);
200 sk_for_each(s, node, &nr_list) {
201 struct nr_sock *nr = nr_sk(s);
202
203 if (nr->your_index == index && nr->your_id == id &&
204 !ax25cmp(&nr->dest_addr, dest)) {
205 bh_lock_sock(s);
206 goto found;
207 }
208 }
209 s = NULL;
210 found:
211 spin_unlock_bh(&nr_list_lock);
212 return s;
213 }
214
215 /*
216 * Find next free circuit ID.
217 */
218 static unsigned short nr_find_next_circuit(void)
219 {
220 unsigned short id = circuit;
221 unsigned char i, j;
222 struct sock *sk;
223
224 for (;;) {
225 i = id / 256;
226 j = id % 256;
227
228 if (i != 0 && j != 0) {
229 if ((sk=nr_find_socket(i, j)) == NULL)
230 break;
231 bh_unlock_sock(sk);
232 }
233
234 id++;
235 }
236
237 return id;
238 }
239
240 /*
241 * Deferred destroy.
242 */
243 void nr_destroy_socket(struct sock *);
244
245 /*
246 * Handler for deferred kills.
247 */
248 static void nr_destroy_timer(unsigned long data)
249 {
250 struct sock *sk=(struct sock *)data;
251 bh_lock_sock(sk);
252 sock_hold(sk);
253 nr_destroy_socket(sk);
254 bh_unlock_sock(sk);
255 sock_put(sk);
256 }
257
258 /*
259 * This is called from user mode and the timers. Thus it protects itself
260 * against interrupt users but doesn't worry about being called during
261 * work. Once it is removed from the queue no interrupt or bottom half
262 * will touch it and we are (fairly 8-) ) safe.
263 */
264 void nr_destroy_socket(struct sock *sk)
265 {
266 struct sk_buff *skb;
267
268 nr_remove_socket(sk);
269
270 nr_stop_heartbeat(sk);
271 nr_stop_t1timer(sk);
272 nr_stop_t2timer(sk);
273 nr_stop_t4timer(sk);
274 nr_stop_idletimer(sk);
275
276 nr_clear_queues(sk); /* Flush the queues */
277
278 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
279 if (skb->sk != sk) { /* A pending connection */
280 /* Queue the unaccepted socket for death */
281 sock_set_flag(skb->sk, SOCK_DEAD);
282 nr_start_heartbeat(skb->sk);
283 nr_sk(skb->sk)->state = NR_STATE_0;
284 }
285
286 kfree_skb(skb);
287 }
288
289 if (atomic_read(&sk->sk_wmem_alloc) ||
290 atomic_read(&sk->sk_rmem_alloc)) {
291 /* Defer: outstanding buffers */
292 sk->sk_timer.function = nr_destroy_timer;
293 sk->sk_timer.expires = jiffies + 2 * HZ;
294 add_timer(&sk->sk_timer);
295 } else
296 sock_put(sk);
297 }
298
299 /*
300 * Handling for system calls applied via the various interfaces to a
301 * NET/ROM socket object.
302 */
303
304 static int nr_setsockopt(struct socket *sock, int level, int optname,
305 char __user *optval, int optlen)
306 {
307 struct sock *sk = sock->sk;
308 struct nr_sock *nr = nr_sk(sk);
309 int opt;
310
311 if (level != SOL_NETROM)
312 return -ENOPROTOOPT;
313
314 if (optlen < sizeof(int))
315 return -EINVAL;
316
317 if (get_user(opt, (int __user *)optval))
318 return -EFAULT;
319
320 switch (optname) {
321 case NETROM_T1:
322 if (opt < 1)
323 return -EINVAL;
324 nr->t1 = opt * HZ;
325 return 0;
326
327 case NETROM_T2:
328 if (opt < 1)
329 return -EINVAL;
330 nr->t2 = opt * HZ;
331 return 0;
332
333 case NETROM_N2:
334 if (opt < 1 || opt > 31)
335 return -EINVAL;
336 nr->n2 = opt;
337 return 0;
338
339 case NETROM_T4:
340 if (opt < 1)
341 return -EINVAL;
342 nr->t4 = opt * HZ;
343 return 0;
344
345 case NETROM_IDLE:
346 if (opt < 0)
347 return -EINVAL;
348 nr->idle = opt * 60 * HZ;
349 return 0;
350
351 default:
352 return -ENOPROTOOPT;
353 }
354 }
355
356 static int nr_getsockopt(struct socket *sock, int level, int optname,
357 char __user *optval, int __user *optlen)
358 {
359 struct sock *sk = sock->sk;
360 struct nr_sock *nr = nr_sk(sk);
361 int val = 0;
362 int len;
363
364 if (level != SOL_NETROM)
365 return -ENOPROTOOPT;
366
367 if (get_user(len, optlen))
368 return -EFAULT;
369
370 if (len < 0)
371 return -EINVAL;
372
373 switch (optname) {
374 case NETROM_T1:
375 val = nr->t1 / HZ;
376 break;
377
378 case NETROM_T2:
379 val = nr->t2 / HZ;
380 break;
381
382 case NETROM_N2:
383 val = nr->n2;
384 break;
385
386 case NETROM_T4:
387 val = nr->t4 / HZ;
388 break;
389
390 case NETROM_IDLE:
391 val = nr->idle / (60 * HZ);
392 break;
393
394 default:
395 return -ENOPROTOOPT;
396 }
397
398 len = min_t(unsigned int, len, sizeof(int));
399
400 if (put_user(len, optlen))
401 return -EFAULT;
402
403 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
404 }
405
406 static int nr_listen(struct socket *sock, int backlog)
407 {
408 struct sock *sk = sock->sk;
409
410 lock_sock(sk);
411 if (sk->sk_state != TCP_LISTEN) {
412 memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN);
413 sk->sk_max_ack_backlog = backlog;
414 sk->sk_state = TCP_LISTEN;
415 release_sock(sk);
416 return 0;
417 }
418 release_sock(sk);
419
420 return -EOPNOTSUPP;
421 }
422
423 static struct proto nr_proto = {
424 .name = "NETROM",
425 .owner = THIS_MODULE,
426 .obj_size = sizeof(struct nr_sock),
427 };
428
429 static int nr_create(struct net *net, struct socket *sock, int protocol)
430 {
431 struct sock *sk;
432 struct nr_sock *nr;
433
434 if (net != &init_net)
435 return -EAFNOSUPPORT;
436
437 if (sock->type != SOCK_SEQPACKET || protocol != 0)
438 return -ESOCKTNOSUPPORT;
439
440 sk = sk_alloc(net, PF_NETROM, GFP_ATOMIC, &nr_proto);
441 if (sk == NULL)
442 return -ENOMEM;
443
444 nr = nr_sk(sk);
445
446 sock_init_data(sock, sk);
447
448 sock->ops = &nr_proto_ops;
449 sk->sk_protocol = protocol;
450
451 skb_queue_head_init(&nr->ack_queue);
452 skb_queue_head_init(&nr->reseq_queue);
453 skb_queue_head_init(&nr->frag_queue);
454
455 nr_init_timers(sk);
456
457 nr->t1 =
458 msecs_to_jiffies(sysctl_netrom_transport_timeout);
459 nr->t2 =
460 msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay);
461 nr->n2 =
462 msecs_to_jiffies(sysctl_netrom_transport_maximum_tries);
463 nr->t4 =
464 msecs_to_jiffies(sysctl_netrom_transport_busy_delay);
465 nr->idle =
466 msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout);
467 nr->window = sysctl_netrom_transport_requested_window_size;
468
469 nr->bpqext = 1;
470 nr->state = NR_STATE_0;
471
472 return 0;
473 }
474
475 static struct sock *nr_make_new(struct sock *osk)
476 {
477 struct sock *sk;
478 struct nr_sock *nr, *onr;
479
480 if (osk->sk_type != SOCK_SEQPACKET)
481 return NULL;
482
483 sk = sk_alloc(sock_net(osk), PF_NETROM, GFP_ATOMIC, osk->sk_prot);
484 if (sk == NULL)
485 return NULL;
486
487 nr = nr_sk(sk);
488
489 sock_init_data(NULL, sk);
490
491 sk->sk_type = osk->sk_type;
492 sk->sk_priority = osk->sk_priority;
493 sk->sk_protocol = osk->sk_protocol;
494 sk->sk_rcvbuf = osk->sk_rcvbuf;
495 sk->sk_sndbuf = osk->sk_sndbuf;
496 sk->sk_state = TCP_ESTABLISHED;
497 sock_copy_flags(sk, osk);
498
499 skb_queue_head_init(&nr->ack_queue);
500 skb_queue_head_init(&nr->reseq_queue);
501 skb_queue_head_init(&nr->frag_queue);
502
503 nr_init_timers(sk);
504
505 onr = nr_sk(osk);
506
507 nr->t1 = onr->t1;
508 nr->t2 = onr->t2;
509 nr->n2 = onr->n2;
510 nr->t4 = onr->t4;
511 nr->idle = onr->idle;
512 nr->window = onr->window;
513
514 nr->device = onr->device;
515 nr->bpqext = onr->bpqext;
516
517 return sk;
518 }
519
520 static int nr_release(struct socket *sock)
521 {
522 struct sock *sk = sock->sk;
523 struct nr_sock *nr;
524
525 if (sk == NULL) return 0;
526
527 sock_hold(sk);
528 sock_orphan(sk);
529 lock_sock(sk);
530 nr = nr_sk(sk);
531
532 switch (nr->state) {
533 case NR_STATE_0:
534 case NR_STATE_1:
535 case NR_STATE_2:
536 nr_disconnect(sk, 0);
537 nr_destroy_socket(sk);
538 break;
539
540 case NR_STATE_3:
541 nr_clear_queues(sk);
542 nr->n2count = 0;
543 nr_write_internal(sk, NR_DISCREQ);
544 nr_start_t1timer(sk);
545 nr_stop_t2timer(sk);
546 nr_stop_t4timer(sk);
547 nr_stop_idletimer(sk);
548 nr->state = NR_STATE_2;
549 sk->sk_state = TCP_CLOSE;
550 sk->sk_shutdown |= SEND_SHUTDOWN;
551 sk->sk_state_change(sk);
552 sock_set_flag(sk, SOCK_DESTROY);
553 break;
554
555 default:
556 break;
557 }
558
559 sock->sk = NULL;
560 release_sock(sk);
561 sock_put(sk);
562
563 return 0;
564 }
565
566 static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
567 {
568 struct sock *sk = sock->sk;
569 struct nr_sock *nr = nr_sk(sk);
570 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
571 struct net_device *dev;
572 ax25_uid_assoc *user;
573 ax25_address *source;
574
575 lock_sock(sk);
576 if (!sock_flag(sk, SOCK_ZAPPED)) {
577 release_sock(sk);
578 return -EINVAL;
579 }
580 if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) {
581 release_sock(sk);
582 return -EINVAL;
583 }
584 if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) {
585 release_sock(sk);
586 return -EINVAL;
587 }
588 if (addr->fsa_ax25.sax25_family != AF_NETROM) {
589 release_sock(sk);
590 return -EINVAL;
591 }
592 if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) {
593 SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n");
594 release_sock(sk);
595 return -EADDRNOTAVAIL;
596 }
597
598 /*
599 * Only the super user can set an arbitrary user callsign.
600 */
601 if (addr->fsa_ax25.sax25_ndigis == 1) {
602 if (!capable(CAP_NET_BIND_SERVICE)) {
603 dev_put(dev);
604 release_sock(sk);
605 return -EACCES;
606 }
607 nr->user_addr = addr->fsa_digipeater[0];
608 nr->source_addr = addr->fsa_ax25.sax25_call;
609 } else {
610 source = &addr->fsa_ax25.sax25_call;
611
612 user = ax25_findbyuid(current->euid);
613 if (user) {
614 nr->user_addr = user->call;
615 ax25_uid_put(user);
616 } else {
617 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
618 release_sock(sk);
619 dev_put(dev);
620 return -EPERM;
621 }
622 nr->user_addr = *source;
623 }
624
625 nr->source_addr = *source;
626 }
627
628 nr->device = dev;
629 nr_insert_socket(sk);
630
631 sock_reset_flag(sk, SOCK_ZAPPED);
632 dev_put(dev);
633 release_sock(sk);
634 SOCK_DEBUG(sk, "NET/ROM: socket is bound\n");
635 return 0;
636 }
637
638 static int nr_connect(struct socket *sock, struct sockaddr *uaddr,
639 int addr_len, int flags)
640 {
641 struct sock *sk = sock->sk;
642 struct nr_sock *nr = nr_sk(sk);
643 struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr;
644 ax25_address *source = NULL;
645 ax25_uid_assoc *user;
646 struct net_device *dev;
647 int err = 0;
648
649 lock_sock(sk);
650 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
651 sock->state = SS_CONNECTED;
652 goto out_release; /* Connect completed during a ERESTARTSYS event */
653 }
654
655 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
656 sock->state = SS_UNCONNECTED;
657 err = -ECONNREFUSED;
658 goto out_release;
659 }
660
661 if (sk->sk_state == TCP_ESTABLISHED) {
662 err = -EISCONN; /* No reconnect on a seqpacket socket */
663 goto out_release;
664 }
665
666 sk->sk_state = TCP_CLOSE;
667 sock->state = SS_UNCONNECTED;
668
669 if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) {
670 err = -EINVAL;
671 goto out_release;
672 }
673 if (addr->sax25_family != AF_NETROM) {
674 err = -EINVAL;
675 goto out_release;
676 }
677 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
678 sock_reset_flag(sk, SOCK_ZAPPED);
679
680 if ((dev = nr_dev_first()) == NULL) {
681 err = -ENETUNREACH;
682 goto out_release;
683 }
684 source = (ax25_address *)dev->dev_addr;
685
686 user = ax25_findbyuid(current->euid);
687 if (user) {
688 nr->user_addr = user->call;
689 ax25_uid_put(user);
690 } else {
691 if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) {
692 dev_put(dev);
693 err = -EPERM;
694 goto out_release;
695 }
696 nr->user_addr = *source;
697 }
698
699 nr->source_addr = *source;
700 nr->device = dev;
701
702 dev_put(dev);
703 nr_insert_socket(sk); /* Finish the bind */
704 }
705
706 nr->dest_addr = addr->sax25_call;
707
708 release_sock(sk);
709 circuit = nr_find_next_circuit();
710 lock_sock(sk);
711
712 nr->my_index = circuit / 256;
713 nr->my_id = circuit % 256;
714
715 circuit++;
716
717 /* Move to connecting socket, start sending Connect Requests */
718 sock->state = SS_CONNECTING;
719 sk->sk_state = TCP_SYN_SENT;
720
721 nr_establish_data_link(sk);
722
723 nr->state = NR_STATE_1;
724
725 nr_start_heartbeat(sk);
726
727 /* Now the loop */
728 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
729 err = -EINPROGRESS;
730 goto out_release;
731 }
732
733 /*
734 * A Connect Ack with Choke or timeout or failed routing will go to
735 * closed.
736 */
737 if (sk->sk_state == TCP_SYN_SENT) {
738 DEFINE_WAIT(wait);
739
740 for (;;) {
741 prepare_to_wait(sk->sk_sleep, &wait,
742 TASK_INTERRUPTIBLE);
743 if (sk->sk_state != TCP_SYN_SENT)
744 break;
745 if (!signal_pending(current)) {
746 release_sock(sk);
747 schedule();
748 lock_sock(sk);
749 continue;
750 }
751 err = -ERESTARTSYS;
752 break;
753 }
754 finish_wait(sk->sk_sleep, &wait);
755 if (err)
756 goto out_release;
757 }
758
759 if (sk->sk_state != TCP_ESTABLISHED) {
760 sock->state = SS_UNCONNECTED;
761 err = sock_error(sk); /* Always set at this point */
762 goto out_release;
763 }
764
765 sock->state = SS_CONNECTED;
766
767 out_release:
768 release_sock(sk);
769
770 return err;
771 }
772
773 static int nr_accept(struct socket *sock, struct socket *newsock, int flags)
774 {
775 struct sk_buff *skb;
776 struct sock *newsk;
777 DEFINE_WAIT(wait);
778 struct sock *sk;
779 int err = 0;
780
781 if ((sk = sock->sk) == NULL)
782 return -EINVAL;
783
784 lock_sock(sk);
785 if (sk->sk_type != SOCK_SEQPACKET) {
786 err = -EOPNOTSUPP;
787 goto out_release;
788 }
789
790 if (sk->sk_state != TCP_LISTEN) {
791 err = -EINVAL;
792 goto out_release;
793 }
794
795 /*
796 * The write queue this time is holding sockets ready to use
797 * hooked into the SABM we saved
798 */
799 for (;;) {
800 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
801 skb = skb_dequeue(&sk->sk_receive_queue);
802 if (skb)
803 break;
804
805 if (flags & O_NONBLOCK) {
806 err = -EWOULDBLOCK;
807 break;
808 }
809 if (!signal_pending(current)) {
810 release_sock(sk);
811 schedule();
812 lock_sock(sk);
813 continue;
814 }
815 err = -ERESTARTSYS;
816 break;
817 }
818 finish_wait(sk->sk_sleep, &wait);
819 if (err)
820 goto out_release;
821
822 newsk = skb->sk;
823 sock_graft(newsk, newsock);
824
825 /* Now attach up the new socket */
826 kfree_skb(skb);
827 sk_acceptq_removed(sk);
828
829 out_release:
830 release_sock(sk);
831
832 return err;
833 }
834
835 static int nr_getname(struct socket *sock, struct sockaddr *uaddr,
836 int *uaddr_len, int peer)
837 {
838 struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr;
839 struct sock *sk = sock->sk;
840 struct nr_sock *nr = nr_sk(sk);
841
842 lock_sock(sk);
843 if (peer != 0) {
844 if (sk->sk_state != TCP_ESTABLISHED) {
845 release_sock(sk);
846 return -ENOTCONN;
847 }
848 sax->fsa_ax25.sax25_family = AF_NETROM;
849 sax->fsa_ax25.sax25_ndigis = 1;
850 sax->fsa_ax25.sax25_call = nr->user_addr;
851 memset(sax->fsa_digipeater, 0, sizeof(sax->fsa_digipeater));
852 sax->fsa_digipeater[0] = nr->dest_addr;
853 *uaddr_len = sizeof(struct full_sockaddr_ax25);
854 } else {
855 sax->fsa_ax25.sax25_family = AF_NETROM;
856 sax->fsa_ax25.sax25_ndigis = 0;
857 sax->fsa_ax25.sax25_call = nr->source_addr;
858 *uaddr_len = sizeof(struct sockaddr_ax25);
859 }
860 release_sock(sk);
861
862 return 0;
863 }
864
865 int nr_rx_frame(struct sk_buff *skb, struct net_device *dev)
866 {
867 struct sock *sk;
868 struct sock *make;
869 struct nr_sock *nr_make;
870 ax25_address *src, *dest, *user;
871 unsigned short circuit_index, circuit_id;
872 unsigned short peer_circuit_index, peer_circuit_id;
873 unsigned short frametype, flags, window, timeout;
874 int ret;
875
876 skb->sk = NULL; /* Initially we don't know who it's for */
877
878 /*
879 * skb->data points to the netrom frame start
880 */
881
882 src = (ax25_address *)(skb->data + 0);
883 dest = (ax25_address *)(skb->data + 7);
884
885 circuit_index = skb->data[15];
886 circuit_id = skb->data[16];
887 peer_circuit_index = skb->data[17];
888 peer_circuit_id = skb->data[18];
889 frametype = skb->data[19] & 0x0F;
890 flags = skb->data[19] & 0xF0;
891
892 /*
893 * Check for an incoming IP over NET/ROM frame.
894 */
895 if (frametype == NR_PROTOEXT &&
896 circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) {
897 skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
898 skb_reset_transport_header(skb);
899
900 return nr_rx_ip(skb, dev);
901 }
902
903 /*
904 * Find an existing socket connection, based on circuit ID, if it's
905 * a Connect Request base it on their circuit ID.
906 *
907 * Circuit ID 0/0 is not valid but it could still be a "reset" for a
908 * circuit that no longer exists at the other end ...
909 */
910
911 sk = NULL;
912
913 if (circuit_index == 0 && circuit_id == 0) {
914 if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG)
915 sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src);
916 } else {
917 if (frametype == NR_CONNREQ)
918 sk = nr_find_peer(circuit_index, circuit_id, src);
919 else
920 sk = nr_find_socket(circuit_index, circuit_id);
921 }
922
923 if (sk != NULL) {
924 skb_reset_transport_header(skb);
925
926 if (frametype == NR_CONNACK && skb->len == 22)
927 nr_sk(sk)->bpqext = 1;
928 else
929 nr_sk(sk)->bpqext = 0;
930
931 ret = nr_process_rx_frame(sk, skb);
932 bh_unlock_sock(sk);
933 return ret;
934 }
935
936 /*
937 * Now it should be a CONNREQ.
938 */
939 if (frametype != NR_CONNREQ) {
940 /*
941 * Here it would be nice to be able to send a reset but
942 * NET/ROM doesn't have one. We've tried to extend the protocol
943 * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that
944 * apparently kills BPQ boxes... :-(
945 * So now we try to follow the established behaviour of
946 * G8PZT's Xrouter which is sending packets with command type 7
947 * as an extension of the protocol.
948 */
949 if (sysctl_netrom_reset_circuit &&
950 (frametype != NR_RESET || flags != 0))
951 nr_transmit_reset(skb, 1);
952
953 return 0;
954 }
955
956 sk = nr_find_listener(dest);
957
958 user = (ax25_address *)(skb->data + 21);
959
960 if (sk == NULL || sk_acceptq_is_full(sk) ||
961 (make = nr_make_new(sk)) == NULL) {
962 nr_transmit_refusal(skb, 0);
963 if (sk)
964 bh_unlock_sock(sk);
965 return 0;
966 }
967
968 window = skb->data[20];
969
970 skb->sk = make;
971 make->sk_state = TCP_ESTABLISHED;
972
973 /* Fill in his circuit details */
974 nr_make = nr_sk(make);
975 nr_make->source_addr = *dest;
976 nr_make->dest_addr = *src;
977 nr_make->user_addr = *user;
978
979 nr_make->your_index = circuit_index;
980 nr_make->your_id = circuit_id;
981
982 bh_unlock_sock(sk);
983 circuit = nr_find_next_circuit();
984 bh_lock_sock(sk);
985
986 nr_make->my_index = circuit / 256;
987 nr_make->my_id = circuit % 256;
988
989 circuit++;
990
991 /* Window negotiation */
992 if (window < nr_make->window)
993 nr_make->window = window;
994
995 /* L4 timeout negotiation */
996 if (skb->len == 37) {
997 timeout = skb->data[36] * 256 + skb->data[35];
998 if (timeout * HZ < nr_make->t1)
999 nr_make->t1 = timeout * HZ;
1000 nr_make->bpqext = 1;
1001 } else {
1002 nr_make->bpqext = 0;
1003 }
1004
1005 nr_write_internal(make, NR_CONNACK);
1006
1007 nr_make->condition = 0x00;
1008 nr_make->vs = 0;
1009 nr_make->va = 0;
1010 nr_make->vr = 0;
1011 nr_make->vl = 0;
1012 nr_make->state = NR_STATE_3;
1013 sk_acceptq_added(sk);
1014 skb_queue_head(&sk->sk_receive_queue, skb);
1015
1016 if (!sock_flag(sk, SOCK_DEAD))
1017 sk->sk_data_ready(sk, skb->len);
1018
1019 bh_unlock_sock(sk);
1020
1021 nr_insert_socket(make);
1022
1023 nr_start_heartbeat(make);
1024 nr_start_idletimer(make);
1025
1026 return 1;
1027 }
1028
1029 static int nr_sendmsg(struct kiocb *iocb, struct socket *sock,
1030 struct msghdr *msg, size_t len)
1031 {
1032 struct sock *sk = sock->sk;
1033 struct nr_sock *nr = nr_sk(sk);
1034 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1035 int err;
1036 struct sockaddr_ax25 sax;
1037 struct sk_buff *skb;
1038 unsigned char *asmptr;
1039 int size;
1040
1041 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1042 return -EINVAL;
1043
1044 lock_sock(sk);
1045 if (sock_flag(sk, SOCK_ZAPPED)) {
1046 err = -EADDRNOTAVAIL;
1047 goto out;
1048 }
1049
1050 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1051 send_sig(SIGPIPE, current, 0);
1052 err = -EPIPE;
1053 goto out;
1054 }
1055
1056 if (nr->device == NULL) {
1057 err = -ENETUNREACH;
1058 goto out;
1059 }
1060
1061 if (usax) {
1062 if (msg->msg_namelen < sizeof(sax)) {
1063 err = -EINVAL;
1064 goto out;
1065 }
1066 sax = *usax;
1067 if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) {
1068 err = -EISCONN;
1069 goto out;
1070 }
1071 if (sax.sax25_family != AF_NETROM) {
1072 err = -EINVAL;
1073 goto out;
1074 }
1075 } else {
1076 if (sk->sk_state != TCP_ESTABLISHED) {
1077 err = -ENOTCONN;
1078 goto out;
1079 }
1080 sax.sax25_family = AF_NETROM;
1081 sax.sax25_call = nr->dest_addr;
1082 }
1083
1084 SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n");
1085
1086 /* Build a packet - the conventional user limit is 236 bytes. We can
1087 do ludicrously large NetROM frames but must not overflow */
1088 if (len > 65536) {
1089 err = -EMSGSIZE;
1090 goto out;
1091 }
1092
1093 SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n");
1094 size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN;
1095
1096 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1097 goto out;
1098
1099 skb_reserve(skb, size - len);
1100 skb_reset_transport_header(skb);
1101
1102 /*
1103 * Push down the NET/ROM header
1104 */
1105
1106 asmptr = skb_push(skb, NR_TRANSPORT_LEN);
1107 SOCK_DEBUG(sk, "Building NET/ROM Header.\n");
1108
1109 /* Build a NET/ROM Transport header */
1110
1111 *asmptr++ = nr->your_index;
1112 *asmptr++ = nr->your_id;
1113 *asmptr++ = 0; /* To be filled in later */
1114 *asmptr++ = 0; /* Ditto */
1115 *asmptr++ = NR_INFO;
1116 SOCK_DEBUG(sk, "Built header.\n");
1117
1118 /*
1119 * Put the data on the end
1120 */
1121 skb_put(skb, len);
1122
1123 SOCK_DEBUG(sk, "NET/ROM: Appending user data\n");
1124
1125 /* User data follows immediately after the NET/ROM transport header */
1126 if (memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len)) {
1127 kfree_skb(skb);
1128 err = -EFAULT;
1129 goto out;
1130 }
1131
1132 SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n");
1133
1134 if (sk->sk_state != TCP_ESTABLISHED) {
1135 kfree_skb(skb);
1136 err = -ENOTCONN;
1137 goto out;
1138 }
1139
1140 nr_output(sk, skb); /* Shove it onto the queue */
1141
1142 err = len;
1143 out:
1144 release_sock(sk);
1145 return err;
1146 }
1147
1148 static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
1149 struct msghdr *msg, size_t size, int flags)
1150 {
1151 struct sock *sk = sock->sk;
1152 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1153 size_t copied;
1154 struct sk_buff *skb;
1155 int er;
1156
1157 /*
1158 * This works for seqpacket too. The receiver has ordered the queue for
1159 * us! We do one quick check first though
1160 */
1161
1162 lock_sock(sk);
1163 if (sk->sk_state != TCP_ESTABLISHED) {
1164 release_sock(sk);
1165 return -ENOTCONN;
1166 }
1167
1168 /* Now we can treat all alike */
1169 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) {
1170 release_sock(sk);
1171 return er;
1172 }
1173
1174 skb_reset_transport_header(skb);
1175 copied = skb->len;
1176
1177 if (copied > size) {
1178 copied = size;
1179 msg->msg_flags |= MSG_TRUNC;
1180 }
1181
1182 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1183
1184 if (sax != NULL) {
1185 sax->sax25_family = AF_NETROM;
1186 skb_copy_from_linear_data_offset(skb, 7, sax->sax25_call.ax25_call,
1187 AX25_ADDR_LEN);
1188 }
1189
1190 msg->msg_namelen = sizeof(*sax);
1191
1192 skb_free_datagram(sk, skb);
1193
1194 release_sock(sk);
1195 return copied;
1196 }
1197
1198
1199 static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1200 {
1201 struct sock *sk = sock->sk;
1202 void __user *argp = (void __user *)arg;
1203 int ret;
1204
1205 switch (cmd) {
1206 case TIOCOUTQ: {
1207 long amount;
1208
1209 lock_sock(sk);
1210 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1211 if (amount < 0)
1212 amount = 0;
1213 release_sock(sk);
1214 return put_user(amount, (int __user *)argp);
1215 }
1216
1217 case TIOCINQ: {
1218 struct sk_buff *skb;
1219 long amount = 0L;
1220
1221 lock_sock(sk);
1222 /* These two are safe on a single CPU system as only user tasks fiddle here */
1223 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1224 amount = skb->len;
1225 release_sock(sk);
1226 return put_user(amount, (int __user *)argp);
1227 }
1228
1229 case SIOCGSTAMP:
1230 lock_sock(sk);
1231 ret = sock_get_timestamp(sk, argp);
1232 release_sock(sk);
1233 return ret;
1234
1235 case SIOCGSTAMPNS:
1236 lock_sock(sk);
1237 ret = sock_get_timestampns(sk, argp);
1238 release_sock(sk);
1239 return ret;
1240
1241 case SIOCGIFADDR:
1242 case SIOCSIFADDR:
1243 case SIOCGIFDSTADDR:
1244 case SIOCSIFDSTADDR:
1245 case SIOCGIFBRDADDR:
1246 case SIOCSIFBRDADDR:
1247 case SIOCGIFNETMASK:
1248 case SIOCSIFNETMASK:
1249 case SIOCGIFMETRIC:
1250 case SIOCSIFMETRIC:
1251 return -EINVAL;
1252
1253 case SIOCADDRT:
1254 case SIOCDELRT:
1255 case SIOCNRDECOBS:
1256 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1257 return nr_rt_ioctl(cmd, argp);
1258
1259 default:
1260 return -ENOIOCTLCMD;
1261 }
1262
1263 return 0;
1264 }
1265
1266 #ifdef CONFIG_PROC_FS
1267
1268 static void *nr_info_start(struct seq_file *seq, loff_t *pos)
1269 {
1270 struct sock *s;
1271 struct hlist_node *node;
1272 int i = 1;
1273
1274 spin_lock_bh(&nr_list_lock);
1275 if (*pos == 0)
1276 return SEQ_START_TOKEN;
1277
1278 sk_for_each(s, node, &nr_list) {
1279 if (i == *pos)
1280 return s;
1281 ++i;
1282 }
1283 return NULL;
1284 }
1285
1286 static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos)
1287 {
1288 ++*pos;
1289
1290 return (v == SEQ_START_TOKEN) ? sk_head(&nr_list)
1291 : sk_next((struct sock *)v);
1292 }
1293
1294 static void nr_info_stop(struct seq_file *seq, void *v)
1295 {
1296 spin_unlock_bh(&nr_list_lock);
1297 }
1298
1299 static int nr_info_show(struct seq_file *seq, void *v)
1300 {
1301 struct sock *s = v;
1302 struct net_device *dev;
1303 struct nr_sock *nr;
1304 const char *devname;
1305 char buf[11];
1306
1307 if (v == SEQ_START_TOKEN)
1308 seq_puts(seq,
1309 "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");
1310
1311 else {
1312
1313 bh_lock_sock(s);
1314 nr = nr_sk(s);
1315
1316 if ((dev = nr->device) == NULL)
1317 devname = "???";
1318 else
1319 devname = dev->name;
1320
1321 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->user_addr));
1322 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->dest_addr));
1323 seq_printf(seq,
1324 "%-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",
1325 ax2asc(buf, &nr->source_addr),
1326 devname,
1327 nr->my_index,
1328 nr->my_id,
1329 nr->your_index,
1330 nr->your_id,
1331 nr->state,
1332 nr->vs,
1333 nr->vr,
1334 nr->va,
1335 ax25_display_timer(&nr->t1timer) / HZ,
1336 nr->t1 / HZ,
1337 ax25_display_timer(&nr->t2timer) / HZ,
1338 nr->t2 / HZ,
1339 ax25_display_timer(&nr->t4timer) / HZ,
1340 nr->t4 / HZ,
1341 ax25_display_timer(&nr->idletimer) / (60 * HZ),
1342 nr->idle / (60 * HZ),
1343 nr->n2count,
1344 nr->n2,
1345 nr->window,
1346 atomic_read(&s->sk_wmem_alloc),
1347 atomic_read(&s->sk_rmem_alloc),
1348 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1349
1350 bh_unlock_sock(s);
1351 }
1352 return 0;
1353 }
1354
1355 static const struct seq_operations nr_info_seqops = {
1356 .start = nr_info_start,
1357 .next = nr_info_next,
1358 .stop = nr_info_stop,
1359 .show = nr_info_show,
1360 };
1361
1362 static int nr_info_open(struct inode *inode, struct file *file)
1363 {
1364 return seq_open(file, &nr_info_seqops);
1365 }
1366
1367 static const struct file_operations nr_info_fops = {
1368 .owner = THIS_MODULE,
1369 .open = nr_info_open,
1370 .read = seq_read,
1371 .llseek = seq_lseek,
1372 .release = seq_release,
1373 };
1374 #endif /* CONFIG_PROC_FS */
1375
1376 static struct net_proto_family nr_family_ops = {
1377 .family = PF_NETROM,
1378 .create = nr_create,
1379 .owner = THIS_MODULE,
1380 };
1381
1382 static const struct proto_ops nr_proto_ops = {
1383 .family = PF_NETROM,
1384 .owner = THIS_MODULE,
1385 .release = nr_release,
1386 .bind = nr_bind,
1387 .connect = nr_connect,
1388 .socketpair = sock_no_socketpair,
1389 .accept = nr_accept,
1390 .getname = nr_getname,
1391 .poll = datagram_poll,
1392 .ioctl = nr_ioctl,
1393 .listen = nr_listen,
1394 .shutdown = sock_no_shutdown,
1395 .setsockopt = nr_setsockopt,
1396 .getsockopt = nr_getsockopt,
1397 .sendmsg = nr_sendmsg,
1398 .recvmsg = nr_recvmsg,
1399 .mmap = sock_no_mmap,
1400 .sendpage = sock_no_sendpage,
1401 };
1402
1403 static struct notifier_block nr_dev_notifier = {
1404 .notifier_call = nr_device_event,
1405 };
1406
1407 static struct net_device **dev_nr;
1408
1409 static struct ax25_protocol nr_pid = {
1410 .pid = AX25_P_NETROM,
1411 .func = nr_route_frame
1412 };
1413
1414 static struct ax25_linkfail nr_linkfail_notifier = {
1415 .func = nr_link_failed,
1416 };
1417
1418 static int __init nr_proto_init(void)
1419 {
1420 int i;
1421 int rc = proto_register(&nr_proto, 0);
1422
1423 if (rc != 0)
1424 goto out;
1425
1426 if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) {
1427 printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n");
1428 return -1;
1429 }
1430
1431 dev_nr = kzalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1432 if (dev_nr == NULL) {
1433 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n");
1434 return -1;
1435 }
1436
1437 for (i = 0; i < nr_ndevs; i++) {
1438 char name[IFNAMSIZ];
1439 struct net_device *dev;
1440
1441 sprintf(name, "nr%d", i);
1442 dev = alloc_netdev(sizeof(struct nr_private), name, nr_setup);
1443 if (!dev) {
1444 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n");
1445 goto fail;
1446 }
1447
1448 dev->base_addr = i;
1449 if (register_netdev(dev)) {
1450 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n");
1451 free_netdev(dev);
1452 goto fail;
1453 }
1454 nr_set_lockdep_key(dev);
1455 dev_nr[i] = dev;
1456 }
1457
1458 if (sock_register(&nr_family_ops)) {
1459 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n");
1460 goto fail;
1461 }
1462
1463 register_netdevice_notifier(&nr_dev_notifier);
1464
1465 ax25_register_pid(&nr_pid);
1466 ax25_linkfail_register(&nr_linkfail_notifier);
1467
1468 #ifdef CONFIG_SYSCTL
1469 nr_register_sysctl();
1470 #endif
1471
1472 nr_loopback_init();
1473
1474 proc_net_fops_create(&init_net, "nr", S_IRUGO, &nr_info_fops);
1475 proc_net_fops_create(&init_net, "nr_neigh", S_IRUGO, &nr_neigh_fops);
1476 proc_net_fops_create(&init_net, "nr_nodes", S_IRUGO, &nr_nodes_fops);
1477 out:
1478 return rc;
1479 fail:
1480 while (--i >= 0) {
1481 unregister_netdev(dev_nr[i]);
1482 free_netdev(dev_nr[i]);
1483 }
1484 kfree(dev_nr);
1485 proto_unregister(&nr_proto);
1486 rc = -1;
1487 goto out;
1488 }
1489
1490 module_init(nr_proto_init);
1491
1492 module_param(nr_ndevs, int, 0);
1493 MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices");
1494
1495 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1496 MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol");
1497 MODULE_LICENSE("GPL");
1498 MODULE_ALIAS_NETPROTO(PF_NETROM);
1499
1500 static void __exit nr_exit(void)
1501 {
1502 int i;
1503
1504 proc_net_remove(&init_net, "nr");
1505 proc_net_remove(&init_net, "nr_neigh");
1506 proc_net_remove(&init_net, "nr_nodes");
1507 nr_loopback_clear();
1508
1509 nr_rt_free();
1510
1511 #ifdef CONFIG_SYSCTL
1512 nr_unregister_sysctl();
1513 #endif
1514
1515 ax25_linkfail_release(&nr_linkfail_notifier);
1516 ax25_protocol_release(AX25_P_NETROM);
1517
1518 unregister_netdevice_notifier(&nr_dev_notifier);
1519
1520 sock_unregister(PF_NETROM);
1521
1522 for (i = 0; i < nr_ndevs; i++) {
1523 struct net_device *dev = dev_nr[i];
1524 if (dev) {
1525 unregister_netdev(dev);
1526 free_netdev(dev);
1527 }
1528 }
1529
1530 kfree(dev_nr);
1531 proto_unregister(&nr_proto);
1532 }
1533 module_exit(nr_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree