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MIPS: Oprofile: Fixup the loose ends in the plumbing.
[linux-2.6/verdex.git] / net / x25 / af_x25.c
blobbfabaf9cba873fa1739460e8dc08dc91f5237bf9
1 /*
2 * X.25 Packet Layer release 002
3 *
4 * This is ALPHA test software. This code may break your machine,
5 * randomly fail to work with new releases, misbehave and/or generally
6 * screw up. It might even work.
7 *
8 * This code REQUIRES 2.1.15 or higher
9 *
10 * This module:
11 * This module is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 * History
17 * X.25 001 Jonathan Naylor Started coding.
18 * X.25 002 Jonathan Naylor Centralised disconnect handling.
19 * New timer architecture.
20 * 2000-03-11 Henner Eisen MSG_EOR handling more POSIX compliant.
21 * 2000-03-22 Daniela Squassoni Allowed disabling/enabling of
22 * facilities negotiation and increased
23 * the throughput upper limit.
24 * 2000-08-27 Arnaldo C. Melo s/suser/capable/ + micro cleanups
25 * 2000-09-04 Henner Eisen Set sock->state in x25_accept().
26 * Fixed x25_output() related skb leakage.
27 * 2000-10-02 Henner Eisen Made x25_kick() single threaded per socket.
28 * 2000-10-27 Henner Eisen MSG_DONTWAIT for fragment allocation.
29 * 2000-11-14 Henner Eisen Closing datalink from NETDEV_GOING_DOWN
30 * 2002-10-06 Arnaldo C. Melo Get rid of cli/sti, move proc stuff to
31 * x25_proc.c, using seq_file
32 * 2005-04-02 Shaun Pereira Selective sub address matching
33 * with call user data
34 * 2005-04-15 Shaun Pereira Fast select with no restriction on
35 * response
36 */
37
38 #include <linux/config.h>
39 #include <linux/module.h>
40 #include <linux/errno.h>
41 #include <linux/kernel.h>
42 #include <linux/sched.h>
43 #include <linux/timer.h>
44 #include <linux/string.h>
45 #include <linux/net.h>
46 #include <linux/netdevice.h>
47 #include <linux/if_arp.h>
48 #include <linux/skbuff.h>
49 #include <net/sock.h>
50 #include <net/tcp_states.h>
51 #include <asm/uaccess.h>
52 #include <linux/fcntl.h>
53 #include <linux/termios.h> /* For TIOCINQ/OUTQ */
54 #include <linux/notifier.h>
55 #include <linux/init.h>
56 #include <net/x25.h>
57
58 int sysctl_x25_restart_request_timeout = X25_DEFAULT_T20;
59 int sysctl_x25_call_request_timeout = X25_DEFAULT_T21;
60 int sysctl_x25_reset_request_timeout = X25_DEFAULT_T22;
61 int sysctl_x25_clear_request_timeout = X25_DEFAULT_T23;
62 int sysctl_x25_ack_holdback_timeout = X25_DEFAULT_T2;
63
64 HLIST_HEAD(x25_list);
65 DEFINE_RWLOCK(x25_list_lock);
66
67 static const struct proto_ops x25_proto_ops;
68
69 static struct x25_address null_x25_address = {" "};
70
71 int x25_addr_ntoa(unsigned char *p, struct x25_address *called_addr,
72 struct x25_address *calling_addr)
73 {
74 int called_len, calling_len;
75 char *called, *calling;
76 int i;
77
78 called_len = (*p >> 0) & 0x0F;
79 calling_len = (*p >> 4) & 0x0F;
80
81 called = called_addr->x25_addr;
82 calling = calling_addr->x25_addr;
83 p++;
84
85 for (i = 0; i < (called_len + calling_len); i++) {
86 if (i < called_len) {
87 if (i % 2 != 0) {
88 *called++ = ((*p >> 0) & 0x0F) + '0';
89 p++;
90 } else {
91 *called++ = ((*p >> 4) & 0x0F) + '0';
92 }
93 } else {
94 if (i % 2 != 0) {
95 *calling++ = ((*p >> 0) & 0x0F) + '0';
96 p++;
97 } else {
98 *calling++ = ((*p >> 4) & 0x0F) + '0';
99 }
100 }
101 }
102
103 *called = *calling = '\0';
104
105 return 1 + (called_len + calling_len + 1) / 2;
106 }
107
108 int x25_addr_aton(unsigned char *p, struct x25_address *called_addr,
109 struct x25_address *calling_addr)
110 {
111 unsigned int called_len, calling_len;
112 char *called, *calling;
113 int i;
114
115 called = called_addr->x25_addr;
116 calling = calling_addr->x25_addr;
117
118 called_len = strlen(called);
119 calling_len = strlen(calling);
120
121 *p++ = (calling_len << 4) | (called_len << 0);
122
123 for (i = 0; i < (called_len + calling_len); i++) {
124 if (i < called_len) {
125 if (i % 2 != 0) {
126 *p |= (*called++ - '0') << 0;
127 p++;
128 } else {
129 *p = 0x00;
130 *p |= (*called++ - '0') << 4;
131 }
132 } else {
133 if (i % 2 != 0) {
134 *p |= (*calling++ - '0') << 0;
135 p++;
136 } else {
137 *p = 0x00;
138 *p |= (*calling++ - '0') << 4;
139 }
140 }
141 }
142
143 return 1 + (called_len + calling_len + 1) / 2;
144 }
145
146 /*
147 * Socket removal during an interrupt is now safe.
148 */
149 static void x25_remove_socket(struct sock *sk)
150 {
151 write_lock_bh(&x25_list_lock);
152 sk_del_node_init(sk);
153 write_unlock_bh(&x25_list_lock);
154 }
155
156 /*
157 * Kill all bound sockets on a dropped device.
158 */
159 static void x25_kill_by_device(struct net_device *dev)
160 {
161 struct sock *s;
162 struct hlist_node *node;
163
164 write_lock_bh(&x25_list_lock);
165
166 sk_for_each(s, node, &x25_list)
167 if (x25_sk(s)->neighbour && x25_sk(s)->neighbour->dev == dev)
168 x25_disconnect(s, ENETUNREACH, 0, 0);
169
170 write_unlock_bh(&x25_list_lock);
171 }
172
173 /*
174 * Handle device status changes.
175 */
176 static int x25_device_event(struct notifier_block *this, unsigned long event,
177 void *ptr)
178 {
179 struct net_device *dev = ptr;
180 struct x25_neigh *nb;
181
182 if (dev->type == ARPHRD_X25
183 #if defined(CONFIG_LLC) || defined(CONFIG_LLC_MODULE)
184 || dev->type == ARPHRD_ETHER
185 #endif
186 ) {
187 switch (event) {
188 case NETDEV_UP:
189 x25_link_device_up(dev);
190 break;
191 case NETDEV_GOING_DOWN:
192 nb = x25_get_neigh(dev);
193 if (nb) {
194 x25_terminate_link(nb);
195 x25_neigh_put(nb);
196 }
197 break;
198 case NETDEV_DOWN:
199 x25_kill_by_device(dev);
200 x25_route_device_down(dev);
201 x25_link_device_down(dev);
202 break;
203 }
204 }
205
206 return NOTIFY_DONE;
207 }
208
209 /*
210 * Add a socket to the bound sockets list.
211 */
212 static void x25_insert_socket(struct sock *sk)
213 {
214 write_lock_bh(&x25_list_lock);
215 sk_add_node(sk, &x25_list);
216 write_unlock_bh(&x25_list_lock);
217 }
218
219 /*
220 * Find a socket that wants to accept the Call Request we just
221 * received. Check the full list for an address/cud match.
222 * If no cuds match return the next_best thing, an address match.
223 * Note: if a listening socket has cud set it must only get calls
224 * with matching cud.
225 */
226 static struct sock *x25_find_listener(struct x25_address *addr,
227 struct sk_buff *skb)
228 {
229 struct sock *s;
230 struct sock *next_best;
231 struct hlist_node *node;
232
233 read_lock_bh(&x25_list_lock);
234 next_best = NULL;
235
236 sk_for_each(s, node, &x25_list)
237 if ((!strcmp(addr->x25_addr,
238 x25_sk(s)->source_addr.x25_addr) ||
239 !strcmp(addr->x25_addr,
240 null_x25_address.x25_addr)) &&
241 s->sk_state == TCP_LISTEN) {
242 /*
243 * Found a listening socket, now check the incoming
244 * call user data vs this sockets call user data
245 */
246 if(skb->len > 0 && x25_sk(s)->cudmatchlength > 0) {
247 if((memcmp(x25_sk(s)->calluserdata.cuddata,
248 skb->data,
249 x25_sk(s)->cudmatchlength)) == 0) {
250 sock_hold(s);
251 goto found;
252 }
253 } else
254 next_best = s;
255 }
256 if (next_best) {
257 s = next_best;
258 sock_hold(s);
259 goto found;
260 }
261 s = NULL;
262 found:
263 read_unlock_bh(&x25_list_lock);
264 return s;
265 }
266
267 /*
268 * Find a connected X.25 socket given my LCI and neighbour.
269 */
270 static struct sock *__x25_find_socket(unsigned int lci, struct x25_neigh *nb)
271 {
272 struct sock *s;
273 struct hlist_node *node;
274
275 sk_for_each(s, node, &x25_list)
276 if (x25_sk(s)->lci == lci && x25_sk(s)->neighbour == nb) {
277 sock_hold(s);
278 goto found;
279 }
280 s = NULL;
281 found:
282 return s;
283 }
284
285 struct sock *x25_find_socket(unsigned int lci, struct x25_neigh *nb)
286 {
287 struct sock *s;
288
289 read_lock_bh(&x25_list_lock);
290 s = __x25_find_socket(lci, nb);
291 read_unlock_bh(&x25_list_lock);
292 return s;
293 }
294
295 /*
296 * Find a unique LCI for a given device.
297 */
298 static unsigned int x25_new_lci(struct x25_neigh *nb)
299 {
300 unsigned int lci = 1;
301 struct sock *sk;
302
303 read_lock_bh(&x25_list_lock);
304
305 while ((sk = __x25_find_socket(lci, nb)) != NULL) {
306 sock_put(sk);
307 if (++lci == 4096) {
308 lci = 0;
309 break;
310 }
311 }
312
313 read_unlock_bh(&x25_list_lock);
314 return lci;
315 }
316
317 /*
318 * Deferred destroy.
319 */
320 void x25_destroy_socket(struct sock *);
321
322 /*
323 * handler for deferred kills.
324 */
325 static void x25_destroy_timer(unsigned long data)
326 {
327 x25_destroy_socket((struct sock *)data);
328 }
329
330 /*
331 * This is called from user mode and the timers. Thus it protects itself
332 * against interrupt users but doesn't worry about being called during
333 * work. Once it is removed from the queue no interrupt or bottom half
334 * will touch it and we are (fairly 8-) ) safe.
335 * Not static as it's used by the timer
336 */
337 void x25_destroy_socket(struct sock *sk)
338 {
339 struct sk_buff *skb;
340
341 sock_hold(sk);
342 lock_sock(sk);
343 x25_stop_heartbeat(sk);
344 x25_stop_timer(sk);
345
346 x25_remove_socket(sk);
347 x25_clear_queues(sk); /* Flush the queues */
348
349 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
350 if (skb->sk != sk) { /* A pending connection */
351 /*
352 * Queue the unaccepted socket for death
353 */
354 sock_set_flag(skb->sk, SOCK_DEAD);
355 x25_start_heartbeat(skb->sk);
356 x25_sk(skb->sk)->state = X25_STATE_0;
357 }
358
359 kfree_skb(skb);
360 }
361
362 if (atomic_read(&sk->sk_wmem_alloc) ||
363 atomic_read(&sk->sk_rmem_alloc)) {
364 /* Defer: outstanding buffers */
365 sk->sk_timer.expires = jiffies + 10 * HZ;
366 sk->sk_timer.function = x25_destroy_timer;
367 sk->sk_timer.data = (unsigned long)sk;
368 add_timer(&sk->sk_timer);
369 } else {
370 /* drop last reference so sock_put will free */
371 __sock_put(sk);
372 }
373
374 release_sock(sk);
375 sock_put(sk);
376 }
377
378 /*
379 * Handling for system calls applied via the various interfaces to a
380 * X.25 socket object.
381 */
382
383 static int x25_setsockopt(struct socket *sock, int level, int optname,
384 char __user *optval, int optlen)
385 {
386 int opt;
387 struct sock *sk = sock->sk;
388 int rc = -ENOPROTOOPT;
389
390 if (level != SOL_X25 || optname != X25_QBITINCL)
391 goto out;
392
393 rc = -EINVAL;
394 if (optlen < sizeof(int))
395 goto out;
396
397 rc = -EFAULT;
398 if (get_user(opt, (int __user *)optval))
399 goto out;
400
401 x25_sk(sk)->qbitincl = !!opt;
402 rc = 0;
403 out:
404 return rc;
405 }
406
407 static int x25_getsockopt(struct socket *sock, int level, int optname,
408 char __user *optval, int __user *optlen)
409 {
410 struct sock *sk = sock->sk;
411 int val, len, rc = -ENOPROTOOPT;
412
413 if (level != SOL_X25 || optname != X25_QBITINCL)
414 goto out;
415
416 rc = -EFAULT;
417 if (get_user(len, optlen))
418 goto out;
419
420 len = min_t(unsigned int, len, sizeof(int));
421
422 rc = -EINVAL;
423 if (len < 0)
424 goto out;
425
426 rc = -EFAULT;
427 if (put_user(len, optlen))
428 goto out;
429
430 val = x25_sk(sk)->qbitincl;
431 rc = copy_to_user(optval, &val, len) ? -EFAULT : 0;
432 out:
433 return rc;
434 }
435
436 static int x25_listen(struct socket *sock, int backlog)
437 {
438 struct sock *sk = sock->sk;
439 int rc = -EOPNOTSUPP;
440
441 if (sk->sk_state != TCP_LISTEN) {
442 memset(&x25_sk(sk)->dest_addr, 0, X25_ADDR_LEN);
443 sk->sk_max_ack_backlog = backlog;
444 sk->sk_state = TCP_LISTEN;
445 rc = 0;
446 }
447
448 return rc;
449 }
450
451 static struct proto x25_proto = {
452 .name = "X25",
453 .owner = THIS_MODULE,
454 .obj_size = sizeof(struct x25_sock),
455 };
456
457 static struct sock *x25_alloc_socket(void)
458 {
459 struct x25_sock *x25;
460 struct sock *sk = sk_alloc(AF_X25, GFP_ATOMIC, &x25_proto, 1);
461
462 if (!sk)
463 goto out;
464
465 sock_init_data(NULL, sk);
466
467 x25 = x25_sk(sk);
468 skb_queue_head_init(&x25->ack_queue);
469 skb_queue_head_init(&x25->fragment_queue);
470 skb_queue_head_init(&x25->interrupt_in_queue);
471 skb_queue_head_init(&x25->interrupt_out_queue);
472 out:
473 return sk;
474 }
475
476 void x25_init_timers(struct sock *sk);
477
478 static int x25_create(struct socket *sock, int protocol)
479 {
480 struct sock *sk;
481 struct x25_sock *x25;
482 int rc = -ESOCKTNOSUPPORT;
483
484 if (sock->type != SOCK_SEQPACKET || protocol)
485 goto out;
486
487 rc = -ENOMEM;
488 if ((sk = x25_alloc_socket()) == NULL)
489 goto out;
490
491 x25 = x25_sk(sk);
492
493 sock_init_data(sock, sk);
494
495 x25_init_timers(sk);
496
497 sock->ops = &x25_proto_ops;
498 sk->sk_protocol = protocol;
499 sk->sk_backlog_rcv = x25_backlog_rcv;
500
501 x25->t21 = sysctl_x25_call_request_timeout;
502 x25->t22 = sysctl_x25_reset_request_timeout;
503 x25->t23 = sysctl_x25_clear_request_timeout;
504 x25->t2 = sysctl_x25_ack_holdback_timeout;
505 x25->state = X25_STATE_0;
506 x25->cudmatchlength = 0;
507 x25->accptapprv = X25_DENY_ACCPT_APPRV; /* normally no cud */
508 /* on call accept */
509
510 x25->facilities.winsize_in = X25_DEFAULT_WINDOW_SIZE;
511 x25->facilities.winsize_out = X25_DEFAULT_WINDOW_SIZE;
512 x25->facilities.pacsize_in = X25_DEFAULT_PACKET_SIZE;
513 x25->facilities.pacsize_out = X25_DEFAULT_PACKET_SIZE;
514 x25->facilities.throughput = X25_DEFAULT_THROUGHPUT;
515 x25->facilities.reverse = X25_DEFAULT_REVERSE;
516 rc = 0;
517 out:
518 return rc;
519 }
520
521 static struct sock *x25_make_new(struct sock *osk)
522 {
523 struct sock *sk = NULL;
524 struct x25_sock *x25, *ox25;
525
526 if (osk->sk_type != SOCK_SEQPACKET)
527 goto out;
528
529 if ((sk = x25_alloc_socket()) == NULL)
530 goto out;
531
532 x25 = x25_sk(sk);
533
534 sk->sk_type = osk->sk_type;
535 sk->sk_socket = osk->sk_socket;
536 sk->sk_priority = osk->sk_priority;
537 sk->sk_protocol = osk->sk_protocol;
538 sk->sk_rcvbuf = osk->sk_rcvbuf;
539 sk->sk_sndbuf = osk->sk_sndbuf;
540 sk->sk_state = TCP_ESTABLISHED;
541 sk->sk_sleep = osk->sk_sleep;
542 sk->sk_backlog_rcv = osk->sk_backlog_rcv;
543 sock_copy_flags(sk, osk);
544
545 ox25 = x25_sk(osk);
546 x25->t21 = ox25->t21;
547 x25->t22 = ox25->t22;
548 x25->t23 = ox25->t23;
549 x25->t2 = ox25->t2;
550 x25->facilities = ox25->facilities;
551 x25->qbitincl = ox25->qbitincl;
552 x25->cudmatchlength = ox25->cudmatchlength;
553 x25->accptapprv = ox25->accptapprv;
554
555 x25_init_timers(sk);
556 out:
557 return sk;
558 }
559
560 static int x25_release(struct socket *sock)
561 {
562 struct sock *sk = sock->sk;
563 struct x25_sock *x25;
564
565 if (!sk)
566 goto out;
567
568 x25 = x25_sk(sk);
569
570 switch (x25->state) {
571
572 case X25_STATE_0:
573 case X25_STATE_2:
574 x25_disconnect(sk, 0, 0, 0);
575 x25_destroy_socket(sk);
576 goto out;
577
578 case X25_STATE_1:
579 case X25_STATE_3:
580 case X25_STATE_4:
581 x25_clear_queues(sk);
582 x25_write_internal(sk, X25_CLEAR_REQUEST);
583 x25_start_t23timer(sk);
584 x25->state = X25_STATE_2;
585 sk->sk_state = TCP_CLOSE;
586 sk->sk_shutdown |= SEND_SHUTDOWN;
587 sk->sk_state_change(sk);
588 sock_set_flag(sk, SOCK_DEAD);
589 sock_set_flag(sk, SOCK_DESTROY);
590 break;
591 }
592
593 sock->sk = NULL;
594 sk->sk_socket = NULL; /* Not used, but we should do this */
595 out:
596 return 0;
597 }
598
599 static int x25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
600 {
601 struct sock *sk = sock->sk;
602 struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr;
603
604 if (!sock_flag(sk, SOCK_ZAPPED) ||
605 addr_len != sizeof(struct sockaddr_x25) ||
606 addr->sx25_family != AF_X25)
607 return -EINVAL;
608
609 x25_sk(sk)->source_addr = addr->sx25_addr;
610 x25_insert_socket(sk);
611 sock_reset_flag(sk, SOCK_ZAPPED);
612 SOCK_DEBUG(sk, "x25_bind: socket is bound\n");
613
614 return 0;
615 }
616
617 static int x25_wait_for_connection_establishment(struct sock *sk)
618 {
619 DECLARE_WAITQUEUE(wait, current);
620 int rc;
621
622 add_wait_queue_exclusive(sk->sk_sleep, &wait);
623 for (;;) {
624 __set_current_state(TASK_INTERRUPTIBLE);
625 rc = -ERESTARTSYS;
626 if (signal_pending(current))
627 break;
628 rc = sock_error(sk);
629 if (rc) {
630 sk->sk_socket->state = SS_UNCONNECTED;
631 break;
632 }
633 rc = 0;
634 if (sk->sk_state != TCP_ESTABLISHED) {
635 release_sock(sk);
636 schedule();
637 lock_sock(sk);
638 } else
639 break;
640 }
641 __set_current_state(TASK_RUNNING);
642 remove_wait_queue(sk->sk_sleep, &wait);
643 return rc;
644 }
645
646 static int x25_connect(struct socket *sock, struct sockaddr *uaddr,
647 int addr_len, int flags)
648 {
649 struct sock *sk = sock->sk;
650 struct x25_sock *x25 = x25_sk(sk);
651 struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr;
652 struct x25_route *rt;
653 int rc = 0;
654
655 lock_sock(sk);
656 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
657 sock->state = SS_CONNECTED;
658 goto out; /* Connect completed during a ERESTARTSYS event */
659 }
660
661 rc = -ECONNREFUSED;
662 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
663 sock->state = SS_UNCONNECTED;
664 goto out;
665 }
666
667 rc = -EISCONN; /* No reconnect on a seqpacket socket */
668 if (sk->sk_state == TCP_ESTABLISHED)
669 goto out;
670
671 sk->sk_state = TCP_CLOSE;
672 sock->state = SS_UNCONNECTED;
673
674 rc = -EINVAL;
675 if (addr_len != sizeof(struct sockaddr_x25) ||
676 addr->sx25_family != AF_X25)
677 goto out;
678
679 rc = -ENETUNREACH;
680 rt = x25_get_route(&addr->sx25_addr);
681 if (!rt)
682 goto out;
683
684 x25->neighbour = x25_get_neigh(rt->dev);
685 if (!x25->neighbour)
686 goto out_put_route;
687
688 x25_limit_facilities(&x25->facilities, x25->neighbour);
689
690 x25->lci = x25_new_lci(x25->neighbour);
691 if (!x25->lci)
692 goto out_put_neigh;
693
694 rc = -EINVAL;
695 if (sock_flag(sk, SOCK_ZAPPED)) /* Must bind first - autobinding does not work */
696 goto out_put_neigh;
697
698 if (!strcmp(x25->source_addr.x25_addr, null_x25_address.x25_addr))
699 memset(&x25->source_addr, '\0', X25_ADDR_LEN);
700
701 x25->dest_addr = addr->sx25_addr;
702
703 /* Move to connecting socket, start sending Connect Requests */
704 sock->state = SS_CONNECTING;
705 sk->sk_state = TCP_SYN_SENT;
706
707 x25->state = X25_STATE_1;
708
709 x25_write_internal(sk, X25_CALL_REQUEST);
710
711 x25_start_heartbeat(sk);
712 x25_start_t21timer(sk);
713
714 /* Now the loop */
715 rc = -EINPROGRESS;
716 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
717 goto out_put_neigh;
718
719 rc = x25_wait_for_connection_establishment(sk);
720 if (rc)
721 goto out_put_neigh;
722
723 sock->state = SS_CONNECTED;
724 rc = 0;
725 out_put_neigh:
726 if (rc)
727 x25_neigh_put(x25->neighbour);
728 out_put_route:
729 x25_route_put(rt);
730 out:
731 release_sock(sk);
732 return rc;
733 }
734
735 static int x25_wait_for_data(struct sock *sk, int timeout)
736 {
737 DECLARE_WAITQUEUE(wait, current);
738 int rc = 0;
739
740 add_wait_queue_exclusive(sk->sk_sleep, &wait);
741 for (;;) {
742 __set_current_state(TASK_INTERRUPTIBLE);
743 if (sk->sk_shutdown & RCV_SHUTDOWN)
744 break;
745 rc = -ERESTARTSYS;
746 if (signal_pending(current))
747 break;
748 rc = -EAGAIN;
749 if (!timeout)
750 break;
751 rc = 0;
752 if (skb_queue_empty(&sk->sk_receive_queue)) {
753 release_sock(sk);
754 timeout = schedule_timeout(timeout);
755 lock_sock(sk);
756 } else
757 break;
758 }
759 __set_current_state(TASK_RUNNING);
760 remove_wait_queue(sk->sk_sleep, &wait);
761 return rc;
762 }
763
764 static int x25_accept(struct socket *sock, struct socket *newsock, int flags)
765 {
766 struct sock *sk = sock->sk;
767 struct sock *newsk;
768 struct sk_buff *skb;
769 int rc = -EINVAL;
770
771 if (!sk || sk->sk_state != TCP_LISTEN)
772 goto out;
773
774 rc = -EOPNOTSUPP;
775 if (sk->sk_type != SOCK_SEQPACKET)
776 goto out;
777
778 lock_sock(sk);
779 rc = x25_wait_for_data(sk, sk->sk_rcvtimeo);
780 if (rc)
781 goto out2;
782 skb = skb_dequeue(&sk->sk_receive_queue);
783 rc = -EINVAL;
784 if (!skb->sk)
785 goto out2;
786 newsk = skb->sk;
787 newsk->sk_socket = newsock;
788 newsk->sk_sleep = &newsock->wait;
789
790 /* Now attach up the new socket */
791 skb->sk = NULL;
792 kfree_skb(skb);
793 sk->sk_ack_backlog--;
794 newsock->sk = newsk;
795 newsock->state = SS_CONNECTED;
796 rc = 0;
797 out2:
798 release_sock(sk);
799 out:
800 return rc;
801 }
802
803 static int x25_getname(struct socket *sock, struct sockaddr *uaddr,
804 int *uaddr_len, int peer)
805 {
806 struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)uaddr;
807 struct sock *sk = sock->sk;
808 struct x25_sock *x25 = x25_sk(sk);
809
810 if (peer) {
811 if (sk->sk_state != TCP_ESTABLISHED)
812 return -ENOTCONN;
813 sx25->sx25_addr = x25->dest_addr;
814 } else
815 sx25->sx25_addr = x25->source_addr;
816
817 sx25->sx25_family = AF_X25;
818 *uaddr_len = sizeof(*sx25);
819
820 return 0;
821 }
822
823 int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *nb,
824 unsigned int lci)
825 {
826 struct sock *sk;
827 struct sock *make;
828 struct x25_sock *makex25;
829 struct x25_address source_addr, dest_addr;
830 struct x25_facilities facilities;
831 int len, rc;
832
833 /*
834 * Remove the LCI and frame type.
835 */
836 skb_pull(skb, X25_STD_MIN_LEN);
837
838 /*
839 * Extract the X.25 addresses and convert them to ASCII strings,
840 * and remove them.
841 */
842 skb_pull(skb, x25_addr_ntoa(skb->data, &source_addr, &dest_addr));
843
844 /*
845 * Get the length of the facilities, skip past them for the moment
846 * get the call user data because this is needed to determine
847 * the correct listener
848 */
849 len = skb->data[0] + 1;
850 skb_pull(skb,len);
851
852 /*
853 * Find a listener for the particular address/cud pair.
854 */
855 sk = x25_find_listener(&source_addr,skb);
856 skb_push(skb,len);
857
858 /*
859 * We can't accept the Call Request.
860 */
861 if (sk == NULL || sk_acceptq_is_full(sk))
862 goto out_clear_request;
863
864 /*
865 * Try to reach a compromise on the requested facilities.
866 */
867 if ((len = x25_negotiate_facilities(skb, sk, &facilities)) == -1)
868 goto out_sock_put;
869
870 /*
871 * current neighbour/link might impose additional limits
872 * on certain facilties
873 */
874
875 x25_limit_facilities(&facilities, nb);
876
877 /*
878 * Try to create a new socket.
879 */
880 make = x25_make_new(sk);
881 if (!make)
882 goto out_sock_put;
883
884 /*
885 * Remove the facilities
886 */
887 skb_pull(skb, len);
888
889 skb->sk = make;
890 make->sk_state = TCP_ESTABLISHED;
891
892 makex25 = x25_sk(make);
893 makex25->lci = lci;
894 makex25->dest_addr = dest_addr;
895 makex25->source_addr = source_addr;
896 makex25->neighbour = nb;
897 makex25->facilities = facilities;
898 makex25->vc_facil_mask = x25_sk(sk)->vc_facil_mask;
899 /* ensure no reverse facil on accept */
900 makex25->vc_facil_mask &= ~X25_MASK_REVERSE;
901 makex25->cudmatchlength = x25_sk(sk)->cudmatchlength;
902
903 /* Normally all calls are accepted immediatly */
904 if(makex25->accptapprv & X25_DENY_ACCPT_APPRV) {
905 x25_write_internal(make, X25_CALL_ACCEPTED);
906 makex25->state = X25_STATE_3;
907 }
908
909 /*
910 * Incoming Call User Data.
911 */
912 if (skb->len >= 0) {
913 memcpy(makex25->calluserdata.cuddata, skb->data, skb->len);
914 makex25->calluserdata.cudlength = skb->len;
915 }
916
917 sk->sk_ack_backlog++;
918
919 x25_insert_socket(make);
920
921 skb_queue_head(&sk->sk_receive_queue, skb);
922
923 x25_start_heartbeat(make);
924
925 if (!sock_flag(sk, SOCK_DEAD))
926 sk->sk_data_ready(sk, skb->len);
927 rc = 1;
928 sock_put(sk);
929 out:
930 return rc;
931 out_sock_put:
932 sock_put(sk);
933 out_clear_request:
934 rc = 0;
935 x25_transmit_clear_request(nb, lci, 0x01);
936 goto out;
937 }
938
939 static int x25_sendmsg(struct kiocb *iocb, struct socket *sock,
940 struct msghdr *msg, size_t len)
941 {
942 struct sock *sk = sock->sk;
943 struct x25_sock *x25 = x25_sk(sk);
944 struct sockaddr_x25 *usx25 = (struct sockaddr_x25 *)msg->msg_name;
945 struct sockaddr_x25 sx25;
946 struct sk_buff *skb;
947 unsigned char *asmptr;
948 int noblock = msg->msg_flags & MSG_DONTWAIT;
949 size_t size;
950 int qbit = 0, rc = -EINVAL;
951
952 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_OOB|MSG_EOR|MSG_CMSG_COMPAT))
953 goto out;
954
955 /* we currently don't support segmented records at the user interface */
956 if (!(msg->msg_flags & (MSG_EOR|MSG_OOB)))
957 goto out;
958
959 rc = -EADDRNOTAVAIL;
960 if (sock_flag(sk, SOCK_ZAPPED))
961 goto out;
962
963 rc = -EPIPE;
964 if (sk->sk_shutdown & SEND_SHUTDOWN) {
965 send_sig(SIGPIPE, current, 0);
966 goto out;
967 }
968
969 rc = -ENETUNREACH;
970 if (!x25->neighbour)
971 goto out;
972
973 if (usx25) {
974 rc = -EINVAL;
975 if (msg->msg_namelen < sizeof(sx25))
976 goto out;
977 memcpy(&sx25, usx25, sizeof(sx25));
978 rc = -EISCONN;
979 if (strcmp(x25->dest_addr.x25_addr, sx25.sx25_addr.x25_addr))
980 goto out;
981 rc = -EINVAL;
982 if (sx25.sx25_family != AF_X25)
983 goto out;
984 } else {
985 /*
986 * FIXME 1003.1g - if the socket is like this because
987 * it has become closed (not started closed) we ought
988 * to SIGPIPE, EPIPE;
989 */
990 rc = -ENOTCONN;
991 if (sk->sk_state != TCP_ESTABLISHED)
992 goto out;
993
994 sx25.sx25_family = AF_X25;
995 sx25.sx25_addr = x25->dest_addr;
996 }
997
998 SOCK_DEBUG(sk, "x25_sendmsg: sendto: Addresses built.\n");
999
1000 /* Build a packet */
1001 SOCK_DEBUG(sk, "x25_sendmsg: sendto: building packet.\n");
1002
1003 if ((msg->msg_flags & MSG_OOB) && len > 32)
1004 len = 32;
1005
1006 size = len + X25_MAX_L2_LEN + X25_EXT_MIN_LEN;
1007
1008 skb = sock_alloc_send_skb(sk, size, noblock, &rc);
1009 if (!skb)
1010 goto out;
1011 X25_SKB_CB(skb)->flags = msg->msg_flags;
1012
1013 skb_reserve(skb, X25_MAX_L2_LEN + X25_EXT_MIN_LEN);
1014
1015 /*
1016 * Put the data on the end
1017 */
1018 SOCK_DEBUG(sk, "x25_sendmsg: Copying user data\n");
1019
1020 asmptr = skb->h.raw = skb_put(skb, len);
1021
1022 rc = memcpy_fromiovec(asmptr, msg->msg_iov, len);
1023 if (rc)
1024 goto out_kfree_skb;
1025
1026 /*
1027 * If the Q BIT Include socket option is in force, the first
1028 * byte of the user data is the logical value of the Q Bit.
1029 */
1030 if (x25->qbitincl) {
1031 qbit = skb->data[0];
1032 skb_pull(skb, 1);
1033 }
1034
1035 /*
1036 * Push down the X.25 header
1037 */
1038 SOCK_DEBUG(sk, "x25_sendmsg: Building X.25 Header.\n");
1039
1040 if (msg->msg_flags & MSG_OOB) {
1041 if (x25->neighbour->extended) {
1042 asmptr = skb_push(skb, X25_STD_MIN_LEN);
1043 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ;
1044 *asmptr++ = (x25->lci >> 0) & 0xFF;
1045 *asmptr++ = X25_INTERRUPT;
1046 } else {
1047 asmptr = skb_push(skb, X25_STD_MIN_LEN);
1048 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ;
1049 *asmptr++ = (x25->lci >> 0) & 0xFF;
1050 *asmptr++ = X25_INTERRUPT;
1051 }
1052 } else {
1053 if (x25->neighbour->extended) {
1054 /* Build an Extended X.25 header */
1055 asmptr = skb_push(skb, X25_EXT_MIN_LEN);
1056 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ;
1057 *asmptr++ = (x25->lci >> 0) & 0xFF;
1058 *asmptr++ = X25_DATA;
1059 *asmptr++ = X25_DATA;
1060 } else {
1061 /* Build an Standard X.25 header */
1062 asmptr = skb_push(skb, X25_STD_MIN_LEN);
1063 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ;
1064 *asmptr++ = (x25->lci >> 0) & 0xFF;
1065 *asmptr++ = X25_DATA;
1066 }
1067
1068 if (qbit)
1069 skb->data[0] |= X25_Q_BIT;
1070 }
1071
1072 SOCK_DEBUG(sk, "x25_sendmsg: Built header.\n");
1073 SOCK_DEBUG(sk, "x25_sendmsg: Transmitting buffer\n");
1074
1075 rc = -ENOTCONN;
1076 if (sk->sk_state != TCP_ESTABLISHED)
1077 goto out_kfree_skb;
1078
1079 if (msg->msg_flags & MSG_OOB)
1080 skb_queue_tail(&x25->interrupt_out_queue, skb);
1081 else {
1082 len = x25_output(sk, skb);
1083 if (len < 0)
1084 kfree_skb(skb);
1085 else if (x25->qbitincl)
1086 len++;
1087 }
1088
1089 /*
1090 * lock_sock() is currently only used to serialize this x25_kick()
1091 * against input-driven x25_kick() calls. It currently only blocks
1092 * incoming packets for this socket and does not protect against
1093 * any other socket state changes and is not called from anywhere
1094 * else. As x25_kick() cannot block and as long as all socket
1095 * operations are BKL-wrapped, we don't need take to care about
1096 * purging the backlog queue in x25_release().
1097 *
1098 * Using lock_sock() to protect all socket operations entirely
1099 * (and making the whole x25 stack SMP aware) unfortunately would
1100 * require major changes to {send,recv}msg and skb allocation methods.
1101 * -> 2.5 ;)
1102 */
1103 lock_sock(sk);
1104 x25_kick(sk);
1105 release_sock(sk);
1106 rc = len;
1107 out:
1108 return rc;
1109 out_kfree_skb:
1110 kfree_skb(skb);
1111 goto out;
1112 }
1113
1114
1115 static int x25_recvmsg(struct kiocb *iocb, struct socket *sock,
1116 struct msghdr *msg, size_t size,
1117 int flags)
1118 {
1119 struct sock *sk = sock->sk;
1120 struct x25_sock *x25 = x25_sk(sk);
1121 struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name;
1122 size_t copied;
1123 int qbit;
1124 struct sk_buff *skb;
1125 unsigned char *asmptr;
1126 int rc = -ENOTCONN;
1127
1128 /*
1129 * This works for seqpacket too. The receiver has ordered the queue for
1130 * us! We do one quick check first though
1131 */
1132 if (sk->sk_state != TCP_ESTABLISHED)
1133 goto out;
1134
1135 if (flags & MSG_OOB) {
1136 rc = -EINVAL;
1137 if (sock_flag(sk, SOCK_URGINLINE) ||
1138 !skb_peek(&x25->interrupt_in_queue))
1139 goto out;
1140
1141 skb = skb_dequeue(&x25->interrupt_in_queue);
1142
1143 skb_pull(skb, X25_STD_MIN_LEN);
1144
1145 /*
1146 * No Q bit information on Interrupt data.
1147 */
1148 if (x25->qbitincl) {
1149 asmptr = skb_push(skb, 1);
1150 *asmptr = 0x00;
1151 }
1152
1153 msg->msg_flags |= MSG_OOB;
1154 } else {
1155 /* Now we can treat all alike */
1156 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1157 flags & MSG_DONTWAIT, &rc);
1158 if (!skb)
1159 goto out;
1160
1161 qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT;
1162
1163 skb_pull(skb, x25->neighbour->extended ?
1164 X25_EXT_MIN_LEN : X25_STD_MIN_LEN);
1165
1166 if (x25->qbitincl) {
1167 asmptr = skb_push(skb, 1);
1168 *asmptr = qbit;
1169 }
1170 }
1171
1172 skb->h.raw = skb->data;
1173
1174 copied = skb->len;
1175
1176 if (copied > size) {
1177 copied = size;
1178 msg->msg_flags |= MSG_TRUNC;
1179 }
1180
1181 /* Currently, each datagram always contains a complete record */
1182 msg->msg_flags |= MSG_EOR;
1183
1184 rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1185 if (rc)
1186 goto out_free_dgram;
1187
1188 if (sx25) {
1189 sx25->sx25_family = AF_X25;
1190 sx25->sx25_addr = x25->dest_addr;
1191 }
1192
1193 msg->msg_namelen = sizeof(struct sockaddr_x25);
1194
1195 lock_sock(sk);
1196 x25_check_rbuf(sk);
1197 release_sock(sk);
1198 rc = copied;
1199 out_free_dgram:
1200 skb_free_datagram(sk, skb);
1201 out:
1202 return rc;
1203 }
1204
1205
1206 static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1207 {
1208 struct sock *sk = sock->sk;
1209 struct x25_sock *x25 = x25_sk(sk);
1210 void __user *argp = (void __user *)arg;
1211 int rc;
1212
1213 switch (cmd) {
1214 case TIOCOUTQ: {
1215 int amount = sk->sk_sndbuf -
1216 atomic_read(&sk->sk_wmem_alloc);
1217 if (amount < 0)
1218 amount = 0;
1219 rc = put_user(amount, (unsigned int __user *)argp);
1220 break;
1221 }
1222
1223 case TIOCINQ: {
1224 struct sk_buff *skb;
1225 int amount = 0;
1226 /*
1227 * These two are safe on a single CPU system as
1228 * only user tasks fiddle here
1229 */
1230 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1231 amount = skb->len;
1232 rc = put_user(amount, (unsigned int __user *)argp);
1233 break;
1234 }
1235
1236 case SIOCGSTAMP:
1237 rc = -EINVAL;
1238 if (sk)
1239 rc = sock_get_timestamp(sk,
1240 (struct timeval __user *)argp);
1241 break;
1242 case SIOCGIFADDR:
1243 case SIOCSIFADDR:
1244 case SIOCGIFDSTADDR:
1245 case SIOCSIFDSTADDR:
1246 case SIOCGIFBRDADDR:
1247 case SIOCSIFBRDADDR:
1248 case SIOCGIFNETMASK:
1249 case SIOCSIFNETMASK:
1250 case SIOCGIFMETRIC:
1251 case SIOCSIFMETRIC:
1252 rc = -EINVAL;
1253 break;
1254 case SIOCADDRT:
1255 case SIOCDELRT:
1256 rc = -EPERM;
1257 if (!capable(CAP_NET_ADMIN))
1258 break;
1259 rc = x25_route_ioctl(cmd, argp);
1260 break;
1261 case SIOCX25GSUBSCRIP:
1262 rc = x25_subscr_ioctl(cmd, argp);
1263 break;
1264 case SIOCX25SSUBSCRIP:
1265 rc = -EPERM;
1266 if (!capable(CAP_NET_ADMIN))
1267 break;
1268 rc = x25_subscr_ioctl(cmd, argp);
1269 break;
1270 case SIOCX25GFACILITIES: {
1271 struct x25_facilities fac = x25->facilities;
1272 rc = copy_to_user(argp, &fac,
1273 sizeof(fac)) ? -EFAULT : 0;
1274 break;
1275 }
1276
1277 case SIOCX25SFACILITIES: {
1278 struct x25_facilities facilities;
1279 rc = -EFAULT;
1280 if (copy_from_user(&facilities, argp,
1281 sizeof(facilities)))
1282 break;
1283 rc = -EINVAL;
1284 if (sk->sk_state != TCP_LISTEN &&
1285 sk->sk_state != TCP_CLOSE)
1286 break;
1287 if (facilities.pacsize_in < X25_PS16 ||
1288 facilities.pacsize_in > X25_PS4096)
1289 break;
1290 if (facilities.pacsize_out < X25_PS16 ||
1291 facilities.pacsize_out > X25_PS4096)
1292 break;
1293 if (facilities.winsize_in < 1 ||
1294 facilities.winsize_in > 127)
1295 break;
1296 if (facilities.throughput < 0x03 ||
1297 facilities.throughput > 0xDD)
1298 break;
1299 if (facilities.reverse &&
1300 (facilities.reverse | 0x81)!= 0x81)
1301 break;
1302 x25->facilities = facilities;
1303 rc = 0;
1304 break;
1305 }
1306
1307 case SIOCX25GCALLUSERDATA: {
1308 struct x25_calluserdata cud = x25->calluserdata;
1309 rc = copy_to_user(argp, &cud,
1310 sizeof(cud)) ? -EFAULT : 0;
1311 break;
1312 }
1313
1314 case SIOCX25SCALLUSERDATA: {
1315 struct x25_calluserdata calluserdata;
1316
1317 rc = -EFAULT;
1318 if (copy_from_user(&calluserdata, argp,
1319 sizeof(calluserdata)))
1320 break;
1321 rc = -EINVAL;
1322 if (calluserdata.cudlength > X25_MAX_CUD_LEN)
1323 break;
1324 x25->calluserdata = calluserdata;
1325 rc = 0;
1326 break;
1327 }
1328
1329 case SIOCX25GCAUSEDIAG: {
1330 struct x25_causediag causediag;
1331 causediag = x25->causediag;
1332 rc = copy_to_user(argp, &causediag,
1333 sizeof(causediag)) ? -EFAULT : 0;
1334 break;
1335 }
1336
1337 case SIOCX25SCUDMATCHLEN: {
1338 struct x25_subaddr sub_addr;
1339 rc = -EINVAL;
1340 if(sk->sk_state != TCP_CLOSE)
1341 break;
1342 rc = -EFAULT;
1343 if (copy_from_user(&sub_addr, argp,
1344 sizeof(sub_addr)))
1345 break;
1346 rc = -EINVAL;
1347 if(sub_addr.cudmatchlength > X25_MAX_CUD_LEN)
1348 break;
1349 x25->cudmatchlength = sub_addr.cudmatchlength;
1350 rc = 0;
1351 break;
1352 }
1353
1354 case SIOCX25CALLACCPTAPPRV: {
1355 rc = -EINVAL;
1356 if (sk->sk_state != TCP_CLOSE)
1357 break;
1358 x25->accptapprv = X25_ALLOW_ACCPT_APPRV;
1359 rc = 0;
1360 break;
1361 }
1362
1363 case SIOCX25SENDCALLACCPT: {
1364 rc = -EINVAL;
1365 if (sk->sk_state != TCP_ESTABLISHED)
1366 break;
1367 if (x25->accptapprv) /* must call accptapprv above */
1368 break;
1369 x25_write_internal(sk, X25_CALL_ACCEPTED);
1370 x25->state = X25_STATE_3;
1371 rc = 0;
1372 break;
1373 }
1374
1375 default:
1376 rc = -ENOIOCTLCMD;
1377 break;
1378 }
1379
1380 return rc;
1381 }
1382
1383 static struct net_proto_family x25_family_ops = {
1384 .family = AF_X25,
1385 .create = x25_create,
1386 .owner = THIS_MODULE,
1387 };
1388
1389 static const struct proto_ops SOCKOPS_WRAPPED(x25_proto_ops) = {
1390 .family = AF_X25,
1391 .owner = THIS_MODULE,
1392 .release = x25_release,
1393 .bind = x25_bind,
1394 .connect = x25_connect,
1395 .socketpair = sock_no_socketpair,
1396 .accept = x25_accept,
1397 .getname = x25_getname,
1398 .poll = datagram_poll,
1399 .ioctl = x25_ioctl,
1400 .listen = x25_listen,
1401 .shutdown = sock_no_shutdown,
1402 .setsockopt = x25_setsockopt,
1403 .getsockopt = x25_getsockopt,
1404 .sendmsg = x25_sendmsg,
1405 .recvmsg = x25_recvmsg,
1406 .mmap = sock_no_mmap,
1407 .sendpage = sock_no_sendpage,
1408 };
1409
1410 #include <linux/smp_lock.h>
1411 SOCKOPS_WRAP(x25_proto, AF_X25);
1412
1413 static struct packet_type x25_packet_type = {
1414 .type = __constant_htons(ETH_P_X25),
1415 .func = x25_lapb_receive_frame,
1416 };
1417
1418 static struct notifier_block x25_dev_notifier = {
1419 .notifier_call = x25_device_event,
1420 };
1421
1422 void x25_kill_by_neigh(struct x25_neigh *nb)
1423 {
1424 struct sock *s;
1425 struct hlist_node *node;
1426
1427 write_lock_bh(&x25_list_lock);
1428
1429 sk_for_each(s, node, &x25_list)
1430 if (x25_sk(s)->neighbour == nb)
1431 x25_disconnect(s, ENETUNREACH, 0, 0);
1432
1433 write_unlock_bh(&x25_list_lock);
1434 }
1435
1436 static int __init x25_init(void)
1437 {
1438 int rc = proto_register(&x25_proto, 0);
1439
1440 if (rc != 0)
1441 goto out;
1442
1443 sock_register(&x25_family_ops);
1444
1445 dev_add_pack(&x25_packet_type);
1446
1447 register_netdevice_notifier(&x25_dev_notifier);
1448
1449 printk(KERN_INFO "X.25 for Linux. Version 0.2 for Linux 2.1.15\n");
1450
1451 #ifdef CONFIG_SYSCTL
1452 x25_register_sysctl();
1453 #endif
1454 x25_proc_init();
1455 out:
1456 return rc;
1457 }
1458 module_init(x25_init);
1459
1460 static void __exit x25_exit(void)
1461 {
1462 x25_proc_exit();
1463 x25_link_free();
1464 x25_route_free();
1465
1466 #ifdef CONFIG_SYSCTL
1467 x25_unregister_sysctl();
1468 #endif
1469
1470 unregister_netdevice_notifier(&x25_dev_notifier);
1471
1472 dev_remove_pack(&x25_packet_type);
1473
1474 sock_unregister(AF_X25);
1475 proto_unregister(&x25_proto);
1476 }
1477 module_exit(x25_exit);
1478
1479 MODULE_AUTHOR("Jonathan Naylor <g4klx@g4klx.demon.co.uk>");
1480 MODULE_DESCRIPTION("The X.25 Packet Layer network layer protocol");
1481 MODULE_LICENSE("GPL");
1482 MODULE_ALIAS_NETPROTO(PF_X25);
Verdex Pro support