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[PATCH] w1: Added DS2433 driver - family id update.
[linux-2.6/verdex.git] / net / x25 / af_x25.c
blob020d73cc8414916f6a0bf65b2fbe675ec5759ead
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 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
544 if (sock_flag(osk, SOCK_ZAPPED))
545 sock_set_flag(sk, SOCK_ZAPPED);
546
547 if (sock_flag(osk, SOCK_DBG))
548 sock_set_flag(sk, SOCK_DBG);
549
550 ox25 = x25_sk(osk);
551 x25->t21 = ox25->t21;
552 x25->t22 = ox25->t22;
553 x25->t23 = ox25->t23;
554 x25->t2 = ox25->t2;
555 x25->facilities = ox25->facilities;
556 x25->qbitincl = ox25->qbitincl;
557 x25->cudmatchlength = ox25->cudmatchlength;
558 x25->accptapprv = ox25->accptapprv;
559
560 x25_init_timers(sk);
561 out:
562 return sk;
563 }
564
565 static int x25_release(struct socket *sock)
566 {
567 struct sock *sk = sock->sk;
568 struct x25_sock *x25;
569
570 if (!sk)
571 goto out;
572
573 x25 = x25_sk(sk);
574
575 switch (x25->state) {
576
577 case X25_STATE_0:
578 case X25_STATE_2:
579 x25_disconnect(sk, 0, 0, 0);
580 x25_destroy_socket(sk);
581 goto out;
582
583 case X25_STATE_1:
584 case X25_STATE_3:
585 case X25_STATE_4:
586 x25_clear_queues(sk);
587 x25_write_internal(sk, X25_CLEAR_REQUEST);
588 x25_start_t23timer(sk);
589 x25->state = X25_STATE_2;
590 sk->sk_state = TCP_CLOSE;
591 sk->sk_shutdown |= SEND_SHUTDOWN;
592 sk->sk_state_change(sk);
593 sock_set_flag(sk, SOCK_DEAD);
594 sock_set_flag(sk, SOCK_DESTROY);
595 break;
596 }
597
598 sock->sk = NULL;
599 sk->sk_socket = NULL; /* Not used, but we should do this */
600 out:
601 return 0;
602 }
603
604 static int x25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
605 {
606 struct sock *sk = sock->sk;
607 struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr;
608
609 if (!sock_flag(sk, SOCK_ZAPPED) ||
610 addr_len != sizeof(struct sockaddr_x25) ||
611 addr->sx25_family != AF_X25)
612 return -EINVAL;
613
614 x25_sk(sk)->source_addr = addr->sx25_addr;
615 x25_insert_socket(sk);
616 sock_reset_flag(sk, SOCK_ZAPPED);
617 SOCK_DEBUG(sk, "x25_bind: socket is bound\n");
618
619 return 0;
620 }
621
622 static int x25_wait_for_connection_establishment(struct sock *sk)
623 {
624 DECLARE_WAITQUEUE(wait, current);
625 int rc;
626
627 add_wait_queue_exclusive(sk->sk_sleep, &wait);
628 for (;;) {
629 __set_current_state(TASK_INTERRUPTIBLE);
630 rc = -ERESTARTSYS;
631 if (signal_pending(current))
632 break;
633 rc = sock_error(sk);
634 if (rc) {
635 sk->sk_socket->state = SS_UNCONNECTED;
636 break;
637 }
638 rc = 0;
639 if (sk->sk_state != TCP_ESTABLISHED) {
640 release_sock(sk);
641 schedule();
642 lock_sock(sk);
643 } else
644 break;
645 }
646 __set_current_state(TASK_RUNNING);
647 remove_wait_queue(sk->sk_sleep, &wait);
648 return rc;
649 }
650
651 static int x25_connect(struct socket *sock, struct sockaddr *uaddr,
652 int addr_len, int flags)
653 {
654 struct sock *sk = sock->sk;
655 struct x25_sock *x25 = x25_sk(sk);
656 struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr;
657 struct x25_route *rt;
658 int rc = 0;
659
660 lock_sock(sk);
661 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
662 sock->state = SS_CONNECTED;
663 goto out; /* Connect completed during a ERESTARTSYS event */
664 }
665
666 rc = -ECONNREFUSED;
667 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
668 sock->state = SS_UNCONNECTED;
669 goto out;
670 }
671
672 rc = -EISCONN; /* No reconnect on a seqpacket socket */
673 if (sk->sk_state == TCP_ESTABLISHED)
674 goto out;
675
676 sk->sk_state = TCP_CLOSE;
677 sock->state = SS_UNCONNECTED;
678
679 rc = -EINVAL;
680 if (addr_len != sizeof(struct sockaddr_x25) ||
681 addr->sx25_family != AF_X25)
682 goto out;
683
684 rc = -ENETUNREACH;
685 rt = x25_get_route(&addr->sx25_addr);
686 if (!rt)
687 goto out;
688
689 x25->neighbour = x25_get_neigh(rt->dev);
690 if (!x25->neighbour)
691 goto out_put_route;
692
693 x25_limit_facilities(&x25->facilities, x25->neighbour);
694
695 x25->lci = x25_new_lci(x25->neighbour);
696 if (!x25->lci)
697 goto out_put_neigh;
698
699 rc = -EINVAL;
700 if (sock_flag(sk, SOCK_ZAPPED)) /* Must bind first - autobinding does not work */
701 goto out_put_neigh;
702
703 if (!strcmp(x25->source_addr.x25_addr, null_x25_address.x25_addr))
704 memset(&x25->source_addr, '\0', X25_ADDR_LEN);
705
706 x25->dest_addr = addr->sx25_addr;
707
708 /* Move to connecting socket, start sending Connect Requests */
709 sock->state = SS_CONNECTING;
710 sk->sk_state = TCP_SYN_SENT;
711
712 x25->state = X25_STATE_1;
713
714 x25_write_internal(sk, X25_CALL_REQUEST);
715
716 x25_start_heartbeat(sk);
717 x25_start_t21timer(sk);
718
719 /* Now the loop */
720 rc = -EINPROGRESS;
721 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
722 goto out_put_neigh;
723
724 rc = x25_wait_for_connection_establishment(sk);
725 if (rc)
726 goto out_put_neigh;
727
728 sock->state = SS_CONNECTED;
729 rc = 0;
730 out_put_neigh:
731 if (rc)
732 x25_neigh_put(x25->neighbour);
733 out_put_route:
734 x25_route_put(rt);
735 out:
736 release_sock(sk);
737 return rc;
738 }
739
740 static int x25_wait_for_data(struct sock *sk, int timeout)
741 {
742 DECLARE_WAITQUEUE(wait, current);
743 int rc = 0;
744
745 add_wait_queue_exclusive(sk->sk_sleep, &wait);
746 for (;;) {
747 __set_current_state(TASK_INTERRUPTIBLE);
748 if (sk->sk_shutdown & RCV_SHUTDOWN)
749 break;
750 rc = -ERESTARTSYS;
751 if (signal_pending(current))
752 break;
753 rc = -EAGAIN;
754 if (!timeout)
755 break;
756 rc = 0;
757 if (skb_queue_empty(&sk->sk_receive_queue)) {
758 release_sock(sk);
759 timeout = schedule_timeout(timeout);
760 lock_sock(sk);
761 } else
762 break;
763 }
764 __set_current_state(TASK_RUNNING);
765 remove_wait_queue(sk->sk_sleep, &wait);
766 return rc;
767 }
768
769 static int x25_accept(struct socket *sock, struct socket *newsock, int flags)
770 {
771 struct sock *sk = sock->sk;
772 struct sock *newsk;
773 struct sk_buff *skb;
774 int rc = -EINVAL;
775
776 if (!sk || sk->sk_state != TCP_LISTEN)
777 goto out;
778
779 rc = -EOPNOTSUPP;
780 if (sk->sk_type != SOCK_SEQPACKET)
781 goto out;
782
783 lock_sock(sk);
784 rc = x25_wait_for_data(sk, sk->sk_rcvtimeo);
785 if (rc)
786 goto out2;
787 skb = skb_dequeue(&sk->sk_receive_queue);
788 rc = -EINVAL;
789 if (!skb->sk)
790 goto out2;
791 newsk = skb->sk;
792 newsk->sk_socket = newsock;
793 newsk->sk_sleep = &newsock->wait;
794
795 /* Now attach up the new socket */
796 skb->sk = NULL;
797 kfree_skb(skb);
798 sk->sk_ack_backlog--;
799 newsock->sk = newsk;
800 newsock->state = SS_CONNECTED;
801 rc = 0;
802 out2:
803 release_sock(sk);
804 out:
805 return rc;
806 }
807
808 static int x25_getname(struct socket *sock, struct sockaddr *uaddr,
809 int *uaddr_len, int peer)
810 {
811 struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)uaddr;
812 struct sock *sk = sock->sk;
813 struct x25_sock *x25 = x25_sk(sk);
814
815 if (peer) {
816 if (sk->sk_state != TCP_ESTABLISHED)
817 return -ENOTCONN;
818 sx25->sx25_addr = x25->dest_addr;
819 } else
820 sx25->sx25_addr = x25->source_addr;
821
822 sx25->sx25_family = AF_X25;
823 *uaddr_len = sizeof(*sx25);
824
825 return 0;
826 }
827
828 int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *nb,
829 unsigned int lci)
830 {
831 struct sock *sk;
832 struct sock *make;
833 struct x25_sock *makex25;
834 struct x25_address source_addr, dest_addr;
835 struct x25_facilities facilities;
836 int len, rc;
837
838 /*
839 * Remove the LCI and frame type.
840 */
841 skb_pull(skb, X25_STD_MIN_LEN);
842
843 /*
844 * Extract the X.25 addresses and convert them to ASCII strings,
845 * and remove them.
846 */
847 skb_pull(skb, x25_addr_ntoa(skb->data, &source_addr, &dest_addr));
848
849 /*
850 * Get the length of the facilities, skip past them for the moment
851 * get the call user data because this is needed to determine
852 * the correct listener
853 */
854 len = skb->data[0] + 1;
855 skb_pull(skb,len);
856
857 /*
858 * Find a listener for the particular address/cud pair.
859 */
860 sk = x25_find_listener(&source_addr,skb);
861 skb_push(skb,len);
862
863 /*
864 * We can't accept the Call Request.
865 */
866 if (sk == NULL || sk_acceptq_is_full(sk))
867 goto out_clear_request;
868
869 /*
870 * Try to reach a compromise on the requested facilities.
871 */
872 if ((len = x25_negotiate_facilities(skb, sk, &facilities)) == -1)
873 goto out_sock_put;
874
875 /*
876 * current neighbour/link might impose additional limits
877 * on certain facilties
878 */
879
880 x25_limit_facilities(&facilities, nb);
881
882 /*
883 * Try to create a new socket.
884 */
885 make = x25_make_new(sk);
886 if (!make)
887 goto out_sock_put;
888
889 /*
890 * Remove the facilities
891 */
892 skb_pull(skb, len);
893
894 skb->sk = make;
895 make->sk_state = TCP_ESTABLISHED;
896
897 makex25 = x25_sk(make);
898 makex25->lci = lci;
899 makex25->dest_addr = dest_addr;
900 makex25->source_addr = source_addr;
901 makex25->neighbour = nb;
902 makex25->facilities = facilities;
903 makex25->vc_facil_mask = x25_sk(sk)->vc_facil_mask;
904 /* ensure no reverse facil on accept */
905 makex25->vc_facil_mask &= ~X25_MASK_REVERSE;
906 makex25->cudmatchlength = x25_sk(sk)->cudmatchlength;
907
908 /* Normally all calls are accepted immediatly */
909 if(makex25->accptapprv & X25_DENY_ACCPT_APPRV) {
910 x25_write_internal(make, X25_CALL_ACCEPTED);
911 makex25->state = X25_STATE_3;
912 }
913
914 /*
915 * Incoming Call User Data.
916 */
917 if (skb->len >= 0) {
918 memcpy(makex25->calluserdata.cuddata, skb->data, skb->len);
919 makex25->calluserdata.cudlength = skb->len;
920 }
921
922 sk->sk_ack_backlog++;
923
924 x25_insert_socket(make);
925
926 skb_queue_head(&sk->sk_receive_queue, skb);
927
928 x25_start_heartbeat(make);
929
930 if (!sock_flag(sk, SOCK_DEAD))
931 sk->sk_data_ready(sk, skb->len);
932 rc = 1;
933 sock_put(sk);
934 out:
935 return rc;
936 out_sock_put:
937 sock_put(sk);
938 out_clear_request:
939 rc = 0;
940 x25_transmit_clear_request(nb, lci, 0x01);
941 goto out;
942 }
943
944 static int x25_sendmsg(struct kiocb *iocb, struct socket *sock,
945 struct msghdr *msg, size_t len)
946 {
947 struct sock *sk = sock->sk;
948 struct x25_sock *x25 = x25_sk(sk);
949 struct sockaddr_x25 *usx25 = (struct sockaddr_x25 *)msg->msg_name;
950 struct sockaddr_x25 sx25;
951 struct sk_buff *skb;
952 unsigned char *asmptr;
953 int noblock = msg->msg_flags & MSG_DONTWAIT;
954 size_t size;
955 int qbit = 0, rc = -EINVAL;
956
957 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_OOB|MSG_EOR|MSG_CMSG_COMPAT))
958 goto out;
959
960 /* we currently don't support segmented records at the user interface */
961 if (!(msg->msg_flags & (MSG_EOR|MSG_OOB)))
962 goto out;
963
964 rc = -EADDRNOTAVAIL;
965 if (sock_flag(sk, SOCK_ZAPPED))
966 goto out;
967
968 rc = -EPIPE;
969 if (sk->sk_shutdown & SEND_SHUTDOWN) {
970 send_sig(SIGPIPE, current, 0);
971 goto out;
972 }
973
974 rc = -ENETUNREACH;
975 if (!x25->neighbour)
976 goto out;
977
978 if (usx25) {
979 rc = -EINVAL;
980 if (msg->msg_namelen < sizeof(sx25))
981 goto out;
982 memcpy(&sx25, usx25, sizeof(sx25));
983 rc = -EISCONN;
984 if (strcmp(x25->dest_addr.x25_addr, sx25.sx25_addr.x25_addr))
985 goto out;
986 rc = -EINVAL;
987 if (sx25.sx25_family != AF_X25)
988 goto out;
989 } else {
990 /*
991 * FIXME 1003.1g - if the socket is like this because
992 * it has become closed (not started closed) we ought
993 * to SIGPIPE, EPIPE;
994 */
995 rc = -ENOTCONN;
996 if (sk->sk_state != TCP_ESTABLISHED)
997 goto out;
998
999 sx25.sx25_family = AF_X25;
1000 sx25.sx25_addr = x25->dest_addr;
1001 }
1002
1003 SOCK_DEBUG(sk, "x25_sendmsg: sendto: Addresses built.\n");
1004
1005 /* Build a packet */
1006 SOCK_DEBUG(sk, "x25_sendmsg: sendto: building packet.\n");
1007
1008 if ((msg->msg_flags & MSG_OOB) && len > 32)
1009 len = 32;
1010
1011 size = len + X25_MAX_L2_LEN + X25_EXT_MIN_LEN;
1012
1013 skb = sock_alloc_send_skb(sk, size, noblock, &rc);
1014 if (!skb)
1015 goto out;
1016 X25_SKB_CB(skb)->flags = msg->msg_flags;
1017
1018 skb_reserve(skb, X25_MAX_L2_LEN + X25_EXT_MIN_LEN);
1019
1020 /*
1021 * Put the data on the end
1022 */
1023 SOCK_DEBUG(sk, "x25_sendmsg: Copying user data\n");
1024
1025 asmptr = skb->h.raw = skb_put(skb, len);
1026
1027 rc = memcpy_fromiovec(asmptr, msg->msg_iov, len);
1028 if (rc)
1029 goto out_kfree_skb;
1030
1031 /*
1032 * If the Q BIT Include socket option is in force, the first
1033 * byte of the user data is the logical value of the Q Bit.
1034 */
1035 if (x25->qbitincl) {
1036 qbit = skb->data[0];
1037 skb_pull(skb, 1);
1038 }
1039
1040 /*
1041 * Push down the X.25 header
1042 */
1043 SOCK_DEBUG(sk, "x25_sendmsg: Building X.25 Header.\n");
1044
1045 if (msg->msg_flags & MSG_OOB) {
1046 if (x25->neighbour->extended) {
1047 asmptr = skb_push(skb, X25_STD_MIN_LEN);
1048 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ;
1049 *asmptr++ = (x25->lci >> 0) & 0xFF;
1050 *asmptr++ = X25_INTERRUPT;
1051 } else {
1052 asmptr = skb_push(skb, X25_STD_MIN_LEN);
1053 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ;
1054 *asmptr++ = (x25->lci >> 0) & 0xFF;
1055 *asmptr++ = X25_INTERRUPT;
1056 }
1057 } else {
1058 if (x25->neighbour->extended) {
1059 /* Build an Extended X.25 header */
1060 asmptr = skb_push(skb, X25_EXT_MIN_LEN);
1061 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ;
1062 *asmptr++ = (x25->lci >> 0) & 0xFF;
1063 *asmptr++ = X25_DATA;
1064 *asmptr++ = X25_DATA;
1065 } else {
1066 /* Build an Standard X.25 header */
1067 asmptr = skb_push(skb, X25_STD_MIN_LEN);
1068 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ;
1069 *asmptr++ = (x25->lci >> 0) & 0xFF;
1070 *asmptr++ = X25_DATA;
1071 }
1072
1073 if (qbit)
1074 skb->data[0] |= X25_Q_BIT;
1075 }
1076
1077 SOCK_DEBUG(sk, "x25_sendmsg: Built header.\n");
1078 SOCK_DEBUG(sk, "x25_sendmsg: Transmitting buffer\n");
1079
1080 rc = -ENOTCONN;
1081 if (sk->sk_state != TCP_ESTABLISHED)
1082 goto out_kfree_skb;
1083
1084 if (msg->msg_flags & MSG_OOB)
1085 skb_queue_tail(&x25->interrupt_out_queue, skb);
1086 else {
1087 len = x25_output(sk, skb);
1088 if (len < 0)
1089 kfree_skb(skb);
1090 else if (x25->qbitincl)
1091 len++;
1092 }
1093
1094 /*
1095 * lock_sock() is currently only used to serialize this x25_kick()
1096 * against input-driven x25_kick() calls. It currently only blocks
1097 * incoming packets for this socket and does not protect against
1098 * any other socket state changes and is not called from anywhere
1099 * else. As x25_kick() cannot block and as long as all socket
1100 * operations are BKL-wrapped, we don't need take to care about
1101 * purging the backlog queue in x25_release().
1102 *
1103 * Using lock_sock() to protect all socket operations entirely
1104 * (and making the whole x25 stack SMP aware) unfortunately would
1105 * require major changes to {send,recv}msg and skb allocation methods.
1106 * -> 2.5 ;)
1107 */
1108 lock_sock(sk);
1109 x25_kick(sk);
1110 release_sock(sk);
1111 rc = len;
1112 out:
1113 return rc;
1114 out_kfree_skb:
1115 kfree_skb(skb);
1116 goto out;
1117 }
1118
1119
1120 static int x25_recvmsg(struct kiocb *iocb, struct socket *sock,
1121 struct msghdr *msg, size_t size,
1122 int flags)
1123 {
1124 struct sock *sk = sock->sk;
1125 struct x25_sock *x25 = x25_sk(sk);
1126 struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name;
1127 size_t copied;
1128 int qbit;
1129 struct sk_buff *skb;
1130 unsigned char *asmptr;
1131 int rc = -ENOTCONN;
1132
1133 /*
1134 * This works for seqpacket too. The receiver has ordered the queue for
1135 * us! We do one quick check first though
1136 */
1137 if (sk->sk_state != TCP_ESTABLISHED)
1138 goto out;
1139
1140 if (flags & MSG_OOB) {
1141 rc = -EINVAL;
1142 if (sock_flag(sk, SOCK_URGINLINE) ||
1143 !skb_peek(&x25->interrupt_in_queue))
1144 goto out;
1145
1146 skb = skb_dequeue(&x25->interrupt_in_queue);
1147
1148 skb_pull(skb, X25_STD_MIN_LEN);
1149
1150 /*
1151 * No Q bit information on Interrupt data.
1152 */
1153 if (x25->qbitincl) {
1154 asmptr = skb_push(skb, 1);
1155 *asmptr = 0x00;
1156 }
1157
1158 msg->msg_flags |= MSG_OOB;
1159 } else {
1160 /* Now we can treat all alike */
1161 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1162 flags & MSG_DONTWAIT, &rc);
1163 if (!skb)
1164 goto out;
1165
1166 qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT;
1167
1168 skb_pull(skb, x25->neighbour->extended ?
1169 X25_EXT_MIN_LEN : X25_STD_MIN_LEN);
1170
1171 if (x25->qbitincl) {
1172 asmptr = skb_push(skb, 1);
1173 *asmptr = qbit;
1174 }
1175 }
1176
1177 skb->h.raw = skb->data;
1178
1179 copied = skb->len;
1180
1181 if (copied > size) {
1182 copied = size;
1183 msg->msg_flags |= MSG_TRUNC;
1184 }
1185
1186 /* Currently, each datagram always contains a complete record */
1187 msg->msg_flags |= MSG_EOR;
1188
1189 rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1190 if (rc)
1191 goto out_free_dgram;
1192
1193 if (sx25) {
1194 sx25->sx25_family = AF_X25;
1195 sx25->sx25_addr = x25->dest_addr;
1196 }
1197
1198 msg->msg_namelen = sizeof(struct sockaddr_x25);
1199
1200 lock_sock(sk);
1201 x25_check_rbuf(sk);
1202 release_sock(sk);
1203 rc = copied;
1204 out_free_dgram:
1205 skb_free_datagram(sk, skb);
1206 out:
1207 return rc;
1208 }
1209
1210
1211 static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1212 {
1213 struct sock *sk = sock->sk;
1214 struct x25_sock *x25 = x25_sk(sk);
1215 void __user *argp = (void __user *)arg;
1216 int rc;
1217
1218 switch (cmd) {
1219 case TIOCOUTQ: {
1220 int amount = sk->sk_sndbuf -
1221 atomic_read(&sk->sk_wmem_alloc);
1222 if (amount < 0)
1223 amount = 0;
1224 rc = put_user(amount, (unsigned int __user *)argp);
1225 break;
1226 }
1227
1228 case TIOCINQ: {
1229 struct sk_buff *skb;
1230 int amount = 0;
1231 /*
1232 * These two are safe on a single CPU system as
1233 * only user tasks fiddle here
1234 */
1235 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1236 amount = skb->len;
1237 rc = put_user(amount, (unsigned int __user *)argp);
1238 break;
1239 }
1240
1241 case SIOCGSTAMP:
1242 rc = -EINVAL;
1243 if (sk)
1244 rc = sock_get_timestamp(sk,
1245 (struct timeval __user *)argp);
1246 break;
1247 case SIOCGIFADDR:
1248 case SIOCSIFADDR:
1249 case SIOCGIFDSTADDR:
1250 case SIOCSIFDSTADDR:
1251 case SIOCGIFBRDADDR:
1252 case SIOCSIFBRDADDR:
1253 case SIOCGIFNETMASK:
1254 case SIOCSIFNETMASK:
1255 case SIOCGIFMETRIC:
1256 case SIOCSIFMETRIC:
1257 rc = -EINVAL;
1258 break;
1259 case SIOCADDRT:
1260 case SIOCDELRT:
1261 rc = -EPERM;
1262 if (!capable(CAP_NET_ADMIN))
1263 break;
1264 rc = x25_route_ioctl(cmd, argp);
1265 break;
1266 case SIOCX25GSUBSCRIP:
1267 rc = x25_subscr_ioctl(cmd, argp);
1268 break;
1269 case SIOCX25SSUBSCRIP:
1270 rc = -EPERM;
1271 if (!capable(CAP_NET_ADMIN))
1272 break;
1273 rc = x25_subscr_ioctl(cmd, argp);
1274 break;
1275 case SIOCX25GFACILITIES: {
1276 struct x25_facilities fac = x25->facilities;
1277 rc = copy_to_user(argp, &fac,
1278 sizeof(fac)) ? -EFAULT : 0;
1279 break;
1280 }
1281
1282 case SIOCX25SFACILITIES: {
1283 struct x25_facilities facilities;
1284 rc = -EFAULT;
1285 if (copy_from_user(&facilities, argp,
1286 sizeof(facilities)))
1287 break;
1288 rc = -EINVAL;
1289 if (sk->sk_state != TCP_LISTEN &&
1290 sk->sk_state != TCP_CLOSE)
1291 break;
1292 if (facilities.pacsize_in < X25_PS16 ||
1293 facilities.pacsize_in > X25_PS4096)
1294 break;
1295 if (facilities.pacsize_out < X25_PS16 ||
1296 facilities.pacsize_out > X25_PS4096)
1297 break;
1298 if (facilities.winsize_in < 1 ||
1299 facilities.winsize_in > 127)
1300 break;
1301 if (facilities.throughput < 0x03 ||
1302 facilities.throughput > 0xDD)
1303 break;
1304 if (facilities.reverse &&
1305 (facilities.reverse | 0x81)!= 0x81)
1306 break;
1307 x25->facilities = facilities;
1308 rc = 0;
1309 break;
1310 }
1311
1312 case SIOCX25GCALLUSERDATA: {
1313 struct x25_calluserdata cud = x25->calluserdata;
1314 rc = copy_to_user(argp, &cud,
1315 sizeof(cud)) ? -EFAULT : 0;
1316 break;
1317 }
1318
1319 case SIOCX25SCALLUSERDATA: {
1320 struct x25_calluserdata calluserdata;
1321
1322 rc = -EFAULT;
1323 if (copy_from_user(&calluserdata, argp,
1324 sizeof(calluserdata)))
1325 break;
1326 rc = -EINVAL;
1327 if (calluserdata.cudlength > X25_MAX_CUD_LEN)
1328 break;
1329 x25->calluserdata = calluserdata;
1330 rc = 0;
1331 break;
1332 }
1333
1334 case SIOCX25GCAUSEDIAG: {
1335 struct x25_causediag causediag;
1336 causediag = x25->causediag;
1337 rc = copy_to_user(argp, &causediag,
1338 sizeof(causediag)) ? -EFAULT : 0;
1339 break;
1340 }
1341
1342 case SIOCX25SCUDMATCHLEN: {
1343 struct x25_subaddr sub_addr;
1344 rc = -EINVAL;
1345 if(sk->sk_state != TCP_CLOSE)
1346 break;
1347 rc = -EFAULT;
1348 if (copy_from_user(&sub_addr, argp,
1349 sizeof(sub_addr)))
1350 break;
1351 rc = -EINVAL;
1352 if(sub_addr.cudmatchlength > X25_MAX_CUD_LEN)
1353 break;
1354 x25->cudmatchlength = sub_addr.cudmatchlength;
1355 rc = 0;
1356 break;
1357 }
1358
1359 case SIOCX25CALLACCPTAPPRV: {
1360 rc = -EINVAL;
1361 if (sk->sk_state != TCP_CLOSE)
1362 break;
1363 x25->accptapprv = X25_ALLOW_ACCPT_APPRV;
1364 rc = 0;
1365 break;
1366 }
1367
1368 case SIOCX25SENDCALLACCPT: {
1369 rc = -EINVAL;
1370 if (sk->sk_state != TCP_ESTABLISHED)
1371 break;
1372 if (x25->accptapprv) /* must call accptapprv above */
1373 break;
1374 x25_write_internal(sk, X25_CALL_ACCEPTED);
1375 x25->state = X25_STATE_3;
1376 rc = 0;
1377 break;
1378 }
1379
1380 default:
1381 rc = dev_ioctl(cmd, argp);
1382 break;
1383 }
1384
1385 return rc;
1386 }
1387
1388 static struct net_proto_family x25_family_ops = {
1389 .family = AF_X25,
1390 .create = x25_create,
1391 .owner = THIS_MODULE,
1392 };
1393
1394 static struct proto_ops SOCKOPS_WRAPPED(x25_proto_ops) = {
1395 .family = AF_X25,
1396 .owner = THIS_MODULE,
1397 .release = x25_release,
1398 .bind = x25_bind,
1399 .connect = x25_connect,
1400 .socketpair = sock_no_socketpair,
1401 .accept = x25_accept,
1402 .getname = x25_getname,
1403 .poll = datagram_poll,
1404 .ioctl = x25_ioctl,
1405 .listen = x25_listen,
1406 .shutdown = sock_no_shutdown,
1407 .setsockopt = x25_setsockopt,
1408 .getsockopt = x25_getsockopt,
1409 .sendmsg = x25_sendmsg,
1410 .recvmsg = x25_recvmsg,
1411 .mmap = sock_no_mmap,
1412 .sendpage = sock_no_sendpage,
1413 };
1414
1415 #include <linux/smp_lock.h>
1416 SOCKOPS_WRAP(x25_proto, AF_X25);
1417
1418 static struct packet_type x25_packet_type = {
1419 .type = __constant_htons(ETH_P_X25),
1420 .func = x25_lapb_receive_frame,
1421 };
1422
1423 static struct notifier_block x25_dev_notifier = {
1424 .notifier_call = x25_device_event,
1425 };
1426
1427 void x25_kill_by_neigh(struct x25_neigh *nb)
1428 {
1429 struct sock *s;
1430 struct hlist_node *node;
1431
1432 write_lock_bh(&x25_list_lock);
1433
1434 sk_for_each(s, node, &x25_list)
1435 if (x25_sk(s)->neighbour == nb)
1436 x25_disconnect(s, ENETUNREACH, 0, 0);
1437
1438 write_unlock_bh(&x25_list_lock);
1439 }
1440
1441 static int __init x25_init(void)
1442 {
1443 int rc = proto_register(&x25_proto, 0);
1444
1445 if (rc != 0)
1446 goto out;
1447
1448 sock_register(&x25_family_ops);
1449
1450 dev_add_pack(&x25_packet_type);
1451
1452 register_netdevice_notifier(&x25_dev_notifier);
1453
1454 printk(KERN_INFO "X.25 for Linux. Version 0.2 for Linux 2.1.15\n");
1455
1456 #ifdef CONFIG_SYSCTL
1457 x25_register_sysctl();
1458 #endif
1459 x25_proc_init();
1460 out:
1461 return rc;
1462 }
1463 module_init(x25_init);
1464
1465 static void __exit x25_exit(void)
1466 {
1467 x25_proc_exit();
1468 x25_link_free();
1469 x25_route_free();
1470
1471 #ifdef CONFIG_SYSCTL
1472 x25_unregister_sysctl();
1473 #endif
1474
1475 unregister_netdevice_notifier(&x25_dev_notifier);
1476
1477 dev_remove_pack(&x25_packet_type);
1478
1479 sock_unregister(AF_X25);
1480 proto_unregister(&x25_proto);
1481 }
1482 module_exit(x25_exit);
1483
1484 MODULE_AUTHOR("Jonathan Naylor <g4klx@g4klx.demon.co.uk>");
1485 MODULE_DESCRIPTION("The X.25 Packet Layer network layer protocol");
1486 MODULE_LICENSE("GPL");
1487 MODULE_ALIAS_NETPROTO(PF_X25);
Verdex Pro support