Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | |
f8e1d201 | 6 | * screw up. It might even work. |
1da177e4 LT |
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. | |
f8e1d201 YH |
21 | * 2000-03-22 Daniela Squassoni Allowed disabling/enabling of |
22 | * facilities negotiation and increased | |
1da177e4 LT |
23 | * the throughput upper limit. |
24 | * 2000-08-27 Arnaldo C. Melo s/suser/capable/ + micro cleanups | |
f8e1d201 | 25 | * 2000-09-04 Henner Eisen Set sock->state in x25_accept(). |
1da177e4 LT |
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 | |
cb65d506 SP |
32 | * 2005-04-02 Shaun Pereira Selective sub address matching |
33 | * with call user data | |
ebc3f64b SP |
34 | * 2005-04-15 Shaun Pereira Fast select with no restriction on |
35 | * response | |
1da177e4 LT |
36 | */ |
37 | ||
1da177e4 | 38 | #include <linux/module.h> |
4fc268d2 | 39 | #include <linux/capability.h> |
1da177e4 LT |
40 | #include <linux/errno.h> |
41 | #include <linux/kernel.h> | |
42 | #include <linux/sched.h> | |
405f5571 | 43 | #include <linux/smp_lock.h> |
1da177e4 LT |
44 | #include <linux/timer.h> |
45 | #include <linux/string.h> | |
46 | #include <linux/net.h> | |
47 | #include <linux/netdevice.h> | |
48 | #include <linux/if_arp.h> | |
49 | #include <linux/skbuff.h> | |
50 | #include <net/sock.h> | |
c752f073 | 51 | #include <net/tcp_states.h> |
1da177e4 LT |
52 | #include <asm/uaccess.h> |
53 | #include <linux/fcntl.h> | |
54 | #include <linux/termios.h> /* For TIOCINQ/OUTQ */ | |
55 | #include <linux/notifier.h> | |
56 | #include <linux/init.h> | |
1b06e6ba SP |
57 | #include <linux/compat.h> |
58 | ||
1da177e4 | 59 | #include <net/x25.h> |
1b06e6ba | 60 | #include <net/compat.h> |
1da177e4 LT |
61 | |
62 | int sysctl_x25_restart_request_timeout = X25_DEFAULT_T20; | |
63 | int sysctl_x25_call_request_timeout = X25_DEFAULT_T21; | |
64 | int sysctl_x25_reset_request_timeout = X25_DEFAULT_T22; | |
65 | int sysctl_x25_clear_request_timeout = X25_DEFAULT_T23; | |
66 | int sysctl_x25_ack_holdback_timeout = X25_DEFAULT_T2; | |
39e21c0d | 67 | int sysctl_x25_forward = 0; |
1da177e4 LT |
68 | |
69 | HLIST_HEAD(x25_list); | |
70 | DEFINE_RWLOCK(x25_list_lock); | |
71 | ||
90ddc4f0 | 72 | static const struct proto_ops x25_proto_ops; |
1da177e4 LT |
73 | |
74 | static struct x25_address null_x25_address = {" "}; | |
75 | ||
1b06e6ba SP |
76 | #ifdef CONFIG_COMPAT |
77 | struct compat_x25_subscrip_struct { | |
78 | char device[200-sizeof(compat_ulong_t)]; | |
79 | compat_ulong_t global_facil_mask; | |
80 | compat_uint_t extended; | |
81 | }; | |
82 | #endif | |
83 | ||
1da177e4 LT |
84 | int x25_addr_ntoa(unsigned char *p, struct x25_address *called_addr, |
85 | struct x25_address *calling_addr) | |
86 | { | |
6bf1574e | 87 | unsigned int called_len, calling_len; |
1da177e4 | 88 | char *called, *calling; |
6bf1574e | 89 | unsigned int i; |
1da177e4 LT |
90 | |
91 | called_len = (*p >> 0) & 0x0F; | |
92 | calling_len = (*p >> 4) & 0x0F; | |
93 | ||
94 | called = called_addr->x25_addr; | |
95 | calling = calling_addr->x25_addr; | |
96 | p++; | |
97 | ||
98 | for (i = 0; i < (called_len + calling_len); i++) { | |
99 | if (i < called_len) { | |
100 | if (i % 2 != 0) { | |
101 | *called++ = ((*p >> 0) & 0x0F) + '0'; | |
102 | p++; | |
103 | } else { | |
104 | *called++ = ((*p >> 4) & 0x0F) + '0'; | |
105 | } | |
106 | } else { | |
107 | if (i % 2 != 0) { | |
108 | *calling++ = ((*p >> 0) & 0x0F) + '0'; | |
109 | p++; | |
110 | } else { | |
111 | *calling++ = ((*p >> 4) & 0x0F) + '0'; | |
112 | } | |
113 | } | |
114 | } | |
115 | ||
116 | *called = *calling = '\0'; | |
117 | ||
118 | return 1 + (called_len + calling_len + 1) / 2; | |
119 | } | |
120 | ||
121 | int x25_addr_aton(unsigned char *p, struct x25_address *called_addr, | |
122 | struct x25_address *calling_addr) | |
123 | { | |
124 | unsigned int called_len, calling_len; | |
125 | char *called, *calling; | |
126 | int i; | |
127 | ||
128 | called = called_addr->x25_addr; | |
129 | calling = calling_addr->x25_addr; | |
130 | ||
131 | called_len = strlen(called); | |
132 | calling_len = strlen(calling); | |
133 | ||
134 | *p++ = (calling_len << 4) | (called_len << 0); | |
135 | ||
136 | for (i = 0; i < (called_len + calling_len); i++) { | |
137 | if (i < called_len) { | |
138 | if (i % 2 != 0) { | |
139 | *p |= (*called++ - '0') << 0; | |
140 | p++; | |
141 | } else { | |
142 | *p = 0x00; | |
143 | *p |= (*called++ - '0') << 4; | |
144 | } | |
145 | } else { | |
146 | if (i % 2 != 0) { | |
147 | *p |= (*calling++ - '0') << 0; | |
148 | p++; | |
149 | } else { | |
150 | *p = 0x00; | |
151 | *p |= (*calling++ - '0') << 4; | |
152 | } | |
153 | } | |
154 | } | |
155 | ||
156 | return 1 + (called_len + calling_len + 1) / 2; | |
157 | } | |
158 | ||
159 | /* | |
160 | * Socket removal during an interrupt is now safe. | |
161 | */ | |
162 | static void x25_remove_socket(struct sock *sk) | |
163 | { | |
164 | write_lock_bh(&x25_list_lock); | |
165 | sk_del_node_init(sk); | |
166 | write_unlock_bh(&x25_list_lock); | |
167 | } | |
168 | ||
169 | /* | |
170 | * Kill all bound sockets on a dropped device. | |
171 | */ | |
172 | static void x25_kill_by_device(struct net_device *dev) | |
173 | { | |
174 | struct sock *s; | |
175 | struct hlist_node *node; | |
176 | ||
177 | write_lock_bh(&x25_list_lock); | |
178 | ||
179 | sk_for_each(s, node, &x25_list) | |
180 | if (x25_sk(s)->neighbour && x25_sk(s)->neighbour->dev == dev) | |
181 | x25_disconnect(s, ENETUNREACH, 0, 0); | |
182 | ||
183 | write_unlock_bh(&x25_list_lock); | |
184 | } | |
185 | ||
186 | /* | |
187 | * Handle device status changes. | |
188 | */ | |
189 | static int x25_device_event(struct notifier_block *this, unsigned long event, | |
190 | void *ptr) | |
191 | { | |
192 | struct net_device *dev = ptr; | |
193 | struct x25_neigh *nb; | |
194 | ||
721499e8 | 195 | if (!net_eq(dev_net(dev), &init_net)) |
e9dc8653 EB |
196 | return NOTIFY_DONE; |
197 | ||
1da177e4 LT |
198 | if (dev->type == ARPHRD_X25 |
199 | #if defined(CONFIG_LLC) || defined(CONFIG_LLC_MODULE) | |
200 | || dev->type == ARPHRD_ETHER | |
201 | #endif | |
202 | ) { | |
203 | switch (event) { | |
204 | case NETDEV_UP: | |
205 | x25_link_device_up(dev); | |
206 | break; | |
207 | case NETDEV_GOING_DOWN: | |
208 | nb = x25_get_neigh(dev); | |
209 | if (nb) { | |
210 | x25_terminate_link(nb); | |
211 | x25_neigh_put(nb); | |
212 | } | |
213 | break; | |
214 | case NETDEV_DOWN: | |
215 | x25_kill_by_device(dev); | |
216 | x25_route_device_down(dev); | |
217 | x25_link_device_down(dev); | |
218 | break; | |
219 | } | |
220 | } | |
221 | ||
222 | return NOTIFY_DONE; | |
223 | } | |
224 | ||
225 | /* | |
226 | * Add a socket to the bound sockets list. | |
227 | */ | |
228 | static void x25_insert_socket(struct sock *sk) | |
229 | { | |
230 | write_lock_bh(&x25_list_lock); | |
231 | sk_add_node(sk, &x25_list); | |
232 | write_unlock_bh(&x25_list_lock); | |
233 | } | |
234 | ||
235 | /* | |
236 | * Find a socket that wants to accept the Call Request we just | |
237 | * received. Check the full list for an address/cud match. | |
238 | * If no cuds match return the next_best thing, an address match. | |
239 | * Note: if a listening socket has cud set it must only get calls | |
240 | * with matching cud. | |
241 | */ | |
cb65d506 SP |
242 | static struct sock *x25_find_listener(struct x25_address *addr, |
243 | struct sk_buff *skb) | |
1da177e4 LT |
244 | { |
245 | struct sock *s; | |
246 | struct sock *next_best; | |
247 | struct hlist_node *node; | |
248 | ||
249 | read_lock_bh(&x25_list_lock); | |
250 | next_best = NULL; | |
251 | ||
252 | sk_for_each(s, node, &x25_list) | |
253 | if ((!strcmp(addr->x25_addr, | |
cb65d506 SP |
254 | x25_sk(s)->source_addr.x25_addr) || |
255 | !strcmp(addr->x25_addr, | |
256 | null_x25_address.x25_addr)) && | |
257 | s->sk_state == TCP_LISTEN) { | |
1da177e4 LT |
258 | /* |
259 | * Found a listening socket, now check the incoming | |
260 | * call user data vs this sockets call user data | |
261 | */ | |
cb65d506 | 262 | if(skb->len > 0 && x25_sk(s)->cudmatchlength > 0) { |
f8e1d201 YH |
263 | if((memcmp(x25_sk(s)->calluserdata.cuddata, |
264 | skb->data, | |
cb65d506 SP |
265 | x25_sk(s)->cudmatchlength)) == 0) { |
266 | sock_hold(s); | |
267 | goto found; | |
268 | } | |
269 | } else | |
1da177e4 | 270 | next_best = s; |
1da177e4 LT |
271 | } |
272 | if (next_best) { | |
273 | s = next_best; | |
274 | sock_hold(s); | |
275 | goto found; | |
276 | } | |
277 | s = NULL; | |
278 | found: | |
279 | read_unlock_bh(&x25_list_lock); | |
280 | return s; | |
281 | } | |
282 | ||
283 | /* | |
284 | * Find a connected X.25 socket given my LCI and neighbour. | |
285 | */ | |
286 | static struct sock *__x25_find_socket(unsigned int lci, struct x25_neigh *nb) | |
287 | { | |
288 | struct sock *s; | |
289 | struct hlist_node *node; | |
290 | ||
291 | sk_for_each(s, node, &x25_list) | |
292 | if (x25_sk(s)->lci == lci && x25_sk(s)->neighbour == nb) { | |
293 | sock_hold(s); | |
294 | goto found; | |
295 | } | |
296 | s = NULL; | |
297 | found: | |
298 | return s; | |
299 | } | |
300 | ||
301 | struct sock *x25_find_socket(unsigned int lci, struct x25_neigh *nb) | |
302 | { | |
303 | struct sock *s; | |
304 | ||
305 | read_lock_bh(&x25_list_lock); | |
306 | s = __x25_find_socket(lci, nb); | |
307 | read_unlock_bh(&x25_list_lock); | |
308 | return s; | |
309 | } | |
310 | ||
311 | /* | |
312 | * Find a unique LCI for a given device. | |
313 | */ | |
314 | static unsigned int x25_new_lci(struct x25_neigh *nb) | |
315 | { | |
316 | unsigned int lci = 1; | |
317 | struct sock *sk; | |
318 | ||
319 | read_lock_bh(&x25_list_lock); | |
320 | ||
321 | while ((sk = __x25_find_socket(lci, nb)) != NULL) { | |
322 | sock_put(sk); | |
323 | if (++lci == 4096) { | |
324 | lci = 0; | |
325 | break; | |
326 | } | |
327 | } | |
328 | ||
329 | read_unlock_bh(&x25_list_lock); | |
330 | return lci; | |
331 | } | |
332 | ||
333 | /* | |
334 | * Deferred destroy. | |
335 | */ | |
14ebaf81 | 336 | static void __x25_destroy_socket(struct sock *); |
1da177e4 LT |
337 | |
338 | /* | |
339 | * handler for deferred kills. | |
340 | */ | |
341 | static void x25_destroy_timer(unsigned long data) | |
342 | { | |
14ebaf81 | 343 | x25_destroy_socket_from_timer((struct sock *)data); |
1da177e4 LT |
344 | } |
345 | ||
346 | /* | |
347 | * This is called from user mode and the timers. Thus it protects itself | |
348 | * against interrupt users but doesn't worry about being called during | |
349 | * work. Once it is removed from the queue no interrupt or bottom half | |
350 | * will touch it and we are (fairly 8-) ) safe. | |
351 | * Not static as it's used by the timer | |
352 | */ | |
14ebaf81 | 353 | static void __x25_destroy_socket(struct sock *sk) |
1da177e4 LT |
354 | { |
355 | struct sk_buff *skb; | |
356 | ||
1da177e4 LT |
357 | x25_stop_heartbeat(sk); |
358 | x25_stop_timer(sk); | |
359 | ||
360 | x25_remove_socket(sk); | |
361 | x25_clear_queues(sk); /* Flush the queues */ | |
362 | ||
363 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
364 | if (skb->sk != sk) { /* A pending connection */ | |
365 | /* | |
366 | * Queue the unaccepted socket for death | |
367 | */ | |
368 | sock_set_flag(skb->sk, SOCK_DEAD); | |
369 | x25_start_heartbeat(skb->sk); | |
370 | x25_sk(skb->sk)->state = X25_STATE_0; | |
371 | } | |
372 | ||
373 | kfree_skb(skb); | |
374 | } | |
375 | ||
c564039f | 376 | if (sk_has_allocations(sk)) { |
1da177e4 LT |
377 | /* Defer: outstanding buffers */ |
378 | sk->sk_timer.expires = jiffies + 10 * HZ; | |
379 | sk->sk_timer.function = x25_destroy_timer; | |
380 | sk->sk_timer.data = (unsigned long)sk; | |
381 | add_timer(&sk->sk_timer); | |
382 | } else { | |
383 | /* drop last reference so sock_put will free */ | |
384 | __sock_put(sk); | |
385 | } | |
14ebaf81 | 386 | } |
1da177e4 | 387 | |
14ebaf81 DM |
388 | void x25_destroy_socket_from_timer(struct sock *sk) |
389 | { | |
390 | sock_hold(sk); | |
391 | bh_lock_sock(sk); | |
392 | __x25_destroy_socket(sk); | |
393 | bh_unlock_sock(sk); | |
394 | sock_put(sk); | |
395 | } | |
396 | ||
397 | static void x25_destroy_socket(struct sock *sk) | |
398 | { | |
399 | sock_hold(sk); | |
400 | lock_sock(sk); | |
401 | __x25_destroy_socket(sk); | |
1da177e4 LT |
402 | release_sock(sk); |
403 | sock_put(sk); | |
404 | } | |
405 | ||
406 | /* | |
407 | * Handling for system calls applied via the various interfaces to a | |
408 | * X.25 socket object. | |
409 | */ | |
410 | ||
411 | static int x25_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 412 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
413 | { |
414 | int opt; | |
415 | struct sock *sk = sock->sk; | |
416 | int rc = -ENOPROTOOPT; | |
417 | ||
418 | if (level != SOL_X25 || optname != X25_QBITINCL) | |
419 | goto out; | |
420 | ||
421 | rc = -EINVAL; | |
422 | if (optlen < sizeof(int)) | |
423 | goto out; | |
424 | ||
425 | rc = -EFAULT; | |
426 | if (get_user(opt, (int __user *)optval)) | |
427 | goto out; | |
428 | ||
429 | x25_sk(sk)->qbitincl = !!opt; | |
430 | rc = 0; | |
431 | out: | |
432 | return rc; | |
433 | } | |
434 | ||
435 | static int x25_getsockopt(struct socket *sock, int level, int optname, | |
436 | char __user *optval, int __user *optlen) | |
437 | { | |
438 | struct sock *sk = sock->sk; | |
439 | int val, len, rc = -ENOPROTOOPT; | |
f8e1d201 | 440 | |
1da177e4 LT |
441 | if (level != SOL_X25 || optname != X25_QBITINCL) |
442 | goto out; | |
443 | ||
444 | rc = -EFAULT; | |
445 | if (get_user(len, optlen)) | |
446 | goto out; | |
447 | ||
448 | len = min_t(unsigned int, len, sizeof(int)); | |
449 | ||
450 | rc = -EINVAL; | |
451 | if (len < 0) | |
452 | goto out; | |
f8e1d201 | 453 | |
1da177e4 LT |
454 | rc = -EFAULT; |
455 | if (put_user(len, optlen)) | |
456 | goto out; | |
457 | ||
458 | val = x25_sk(sk)->qbitincl; | |
459 | rc = copy_to_user(optval, &val, len) ? -EFAULT : 0; | |
460 | out: | |
461 | return rc; | |
462 | } | |
463 | ||
464 | static int x25_listen(struct socket *sock, int backlog) | |
465 | { | |
466 | struct sock *sk = sock->sk; | |
467 | int rc = -EOPNOTSUPP; | |
468 | ||
469 | if (sk->sk_state != TCP_LISTEN) { | |
470 | memset(&x25_sk(sk)->dest_addr, 0, X25_ADDR_LEN); | |
471 | sk->sk_max_ack_backlog = backlog; | |
472 | sk->sk_state = TCP_LISTEN; | |
473 | rc = 0; | |
474 | } | |
475 | ||
476 | return rc; | |
477 | } | |
478 | ||
479 | static struct proto x25_proto = { | |
480 | .name = "X25", | |
481 | .owner = THIS_MODULE, | |
482 | .obj_size = sizeof(struct x25_sock), | |
483 | }; | |
484 | ||
1b8d7ae4 | 485 | static struct sock *x25_alloc_socket(struct net *net) |
1da177e4 LT |
486 | { |
487 | struct x25_sock *x25; | |
6257ff21 | 488 | struct sock *sk = sk_alloc(net, AF_X25, GFP_ATOMIC, &x25_proto); |
1da177e4 LT |
489 | |
490 | if (!sk) | |
491 | goto out; | |
492 | ||
493 | sock_init_data(NULL, sk); | |
494 | ||
495 | x25 = x25_sk(sk); | |
496 | skb_queue_head_init(&x25->ack_queue); | |
497 | skb_queue_head_init(&x25->fragment_queue); | |
498 | skb_queue_head_init(&x25->interrupt_in_queue); | |
499 | skb_queue_head_init(&x25->interrupt_out_queue); | |
500 | out: | |
501 | return sk; | |
502 | } | |
503 | ||
1b8d7ae4 | 504 | static int x25_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
505 | { |
506 | struct sock *sk; | |
507 | struct x25_sock *x25; | |
508 | int rc = -ESOCKTNOSUPPORT; | |
509 | ||
1b8d7ae4 EB |
510 | if (net != &init_net) |
511 | return -EAFNOSUPPORT; | |
512 | ||
1da177e4 LT |
513 | if (sock->type != SOCK_SEQPACKET || protocol) |
514 | goto out; | |
515 | ||
516 | rc = -ENOMEM; | |
1b8d7ae4 | 517 | if ((sk = x25_alloc_socket(net)) == NULL) |
1da177e4 LT |
518 | goto out; |
519 | ||
520 | x25 = x25_sk(sk); | |
521 | ||
522 | sock_init_data(sock, sk); | |
523 | ||
524 | x25_init_timers(sk); | |
525 | ||
526 | sock->ops = &x25_proto_ops; | |
527 | sk->sk_protocol = protocol; | |
528 | sk->sk_backlog_rcv = x25_backlog_rcv; | |
529 | ||
530 | x25->t21 = sysctl_x25_call_request_timeout; | |
531 | x25->t22 = sysctl_x25_reset_request_timeout; | |
532 | x25->t23 = sysctl_x25_clear_request_timeout; | |
533 | x25->t2 = sysctl_x25_ack_holdback_timeout; | |
534 | x25->state = X25_STATE_0; | |
cb65d506 | 535 | x25->cudmatchlength = 0; |
ebc3f64b SP |
536 | x25->accptapprv = X25_DENY_ACCPT_APPRV; /* normally no cud */ |
537 | /* on call accept */ | |
1da177e4 LT |
538 | |
539 | x25->facilities.winsize_in = X25_DEFAULT_WINDOW_SIZE; | |
540 | x25->facilities.winsize_out = X25_DEFAULT_WINDOW_SIZE; | |
541 | x25->facilities.pacsize_in = X25_DEFAULT_PACKET_SIZE; | |
542 | x25->facilities.pacsize_out = X25_DEFAULT_PACKET_SIZE; | |
543 | x25->facilities.throughput = X25_DEFAULT_THROUGHPUT; | |
544 | x25->facilities.reverse = X25_DEFAULT_REVERSE; | |
f8e1d201 YH |
545 | x25->dte_facilities.calling_len = 0; |
546 | x25->dte_facilities.called_len = 0; | |
547 | memset(x25->dte_facilities.called_ae, '\0', | |
548 | sizeof(x25->dte_facilities.called_ae)); | |
549 | memset(x25->dte_facilities.calling_ae, '\0', | |
550 | sizeof(x25->dte_facilities.calling_ae)); | |
a64b7b93 | 551 | |
1da177e4 LT |
552 | rc = 0; |
553 | out: | |
554 | return rc; | |
555 | } | |
556 | ||
557 | static struct sock *x25_make_new(struct sock *osk) | |
558 | { | |
559 | struct sock *sk = NULL; | |
560 | struct x25_sock *x25, *ox25; | |
561 | ||
562 | if (osk->sk_type != SOCK_SEQPACKET) | |
563 | goto out; | |
564 | ||
3b1e0a65 | 565 | if ((sk = x25_alloc_socket(sock_net(osk))) == NULL) |
1da177e4 LT |
566 | goto out; |
567 | ||
568 | x25 = x25_sk(sk); | |
569 | ||
570 | sk->sk_type = osk->sk_type; | |
1da177e4 LT |
571 | sk->sk_priority = osk->sk_priority; |
572 | sk->sk_protocol = osk->sk_protocol; | |
573 | sk->sk_rcvbuf = osk->sk_rcvbuf; | |
574 | sk->sk_sndbuf = osk->sk_sndbuf; | |
575 | sk->sk_state = TCP_ESTABLISHED; | |
1da177e4 | 576 | sk->sk_backlog_rcv = osk->sk_backlog_rcv; |
a20a8554 | 577 | sock_copy_flags(sk, osk); |
1da177e4 LT |
578 | |
579 | ox25 = x25_sk(osk); | |
580 | x25->t21 = ox25->t21; | |
581 | x25->t22 = ox25->t22; | |
582 | x25->t23 = ox25->t23; | |
583 | x25->t2 = ox25->t2; | |
584 | x25->facilities = ox25->facilities; | |
585 | x25->qbitincl = ox25->qbitincl; | |
a64b7b93 | 586 | x25->dte_facilities = ox25->dte_facilities; |
cb65d506 | 587 | x25->cudmatchlength = ox25->cudmatchlength; |
ebc3f64b | 588 | x25->accptapprv = ox25->accptapprv; |
1da177e4 LT |
589 | |
590 | x25_init_timers(sk); | |
591 | out: | |
592 | return sk; | |
593 | } | |
594 | ||
595 | static int x25_release(struct socket *sock) | |
596 | { | |
597 | struct sock *sk = sock->sk; | |
598 | struct x25_sock *x25; | |
599 | ||
600 | if (!sk) | |
601 | goto out; | |
602 | ||
603 | x25 = x25_sk(sk); | |
604 | ||
605 | switch (x25->state) { | |
606 | ||
607 | case X25_STATE_0: | |
608 | case X25_STATE_2: | |
609 | x25_disconnect(sk, 0, 0, 0); | |
610 | x25_destroy_socket(sk); | |
611 | goto out; | |
612 | ||
613 | case X25_STATE_1: | |
614 | case X25_STATE_3: | |
615 | case X25_STATE_4: | |
616 | x25_clear_queues(sk); | |
617 | x25_write_internal(sk, X25_CLEAR_REQUEST); | |
618 | x25_start_t23timer(sk); | |
619 | x25->state = X25_STATE_2; | |
620 | sk->sk_state = TCP_CLOSE; | |
621 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
622 | sk->sk_state_change(sk); | |
623 | sock_set_flag(sk, SOCK_DEAD); | |
624 | sock_set_flag(sk, SOCK_DESTROY); | |
625 | break; | |
626 | } | |
627 | ||
c751e4f8 | 628 | sock_orphan(sk); |
1da177e4 LT |
629 | out: |
630 | return 0; | |
631 | } | |
632 | ||
633 | static int x25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
634 | { | |
635 | struct sock *sk = sock->sk; | |
636 | struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr; | |
637 | ||
638 | if (!sock_flag(sk, SOCK_ZAPPED) || | |
639 | addr_len != sizeof(struct sockaddr_x25) || | |
640 | addr->sx25_family != AF_X25) | |
641 | return -EINVAL; | |
642 | ||
643 | x25_sk(sk)->source_addr = addr->sx25_addr; | |
644 | x25_insert_socket(sk); | |
645 | sock_reset_flag(sk, SOCK_ZAPPED); | |
646 | SOCK_DEBUG(sk, "x25_bind: socket is bound\n"); | |
647 | ||
648 | return 0; | |
649 | } | |
650 | ||
651 | static int x25_wait_for_connection_establishment(struct sock *sk) | |
652 | { | |
653 | DECLARE_WAITQUEUE(wait, current); | |
f8e1d201 | 654 | int rc; |
1da177e4 LT |
655 | |
656 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
657 | for (;;) { | |
658 | __set_current_state(TASK_INTERRUPTIBLE); | |
659 | rc = -ERESTARTSYS; | |
660 | if (signal_pending(current)) | |
661 | break; | |
662 | rc = sock_error(sk); | |
663 | if (rc) { | |
664 | sk->sk_socket->state = SS_UNCONNECTED; | |
665 | break; | |
666 | } | |
667 | rc = 0; | |
668 | if (sk->sk_state != TCP_ESTABLISHED) { | |
669 | release_sock(sk); | |
670 | schedule(); | |
671 | lock_sock(sk); | |
672 | } else | |
673 | break; | |
674 | } | |
675 | __set_current_state(TASK_RUNNING); | |
676 | remove_wait_queue(sk->sk_sleep, &wait); | |
677 | return rc; | |
678 | } | |
679 | ||
680 | static int x25_connect(struct socket *sock, struct sockaddr *uaddr, | |
681 | int addr_len, int flags) | |
682 | { | |
683 | struct sock *sk = sock->sk; | |
684 | struct x25_sock *x25 = x25_sk(sk); | |
685 | struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr; | |
686 | struct x25_route *rt; | |
687 | int rc = 0; | |
688 | ||
689 | lock_sock(sk); | |
690 | if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { | |
691 | sock->state = SS_CONNECTED; | |
692 | goto out; /* Connect completed during a ERESTARTSYS event */ | |
693 | } | |
694 | ||
695 | rc = -ECONNREFUSED; | |
696 | if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { | |
697 | sock->state = SS_UNCONNECTED; | |
698 | goto out; | |
699 | } | |
700 | ||
701 | rc = -EISCONN; /* No reconnect on a seqpacket socket */ | |
702 | if (sk->sk_state == TCP_ESTABLISHED) | |
703 | goto out; | |
704 | ||
f8e1d201 | 705 | sk->sk_state = TCP_CLOSE; |
1da177e4 LT |
706 | sock->state = SS_UNCONNECTED; |
707 | ||
708 | rc = -EINVAL; | |
709 | if (addr_len != sizeof(struct sockaddr_x25) || | |
710 | addr->sx25_family != AF_X25) | |
711 | goto out; | |
712 | ||
713 | rc = -ENETUNREACH; | |
714 | rt = x25_get_route(&addr->sx25_addr); | |
715 | if (!rt) | |
716 | goto out; | |
717 | ||
718 | x25->neighbour = x25_get_neigh(rt->dev); | |
719 | if (!x25->neighbour) | |
720 | goto out_put_route; | |
721 | ||
722 | x25_limit_facilities(&x25->facilities, x25->neighbour); | |
723 | ||
724 | x25->lci = x25_new_lci(x25->neighbour); | |
725 | if (!x25->lci) | |
726 | goto out_put_neigh; | |
727 | ||
728 | rc = -EINVAL; | |
729 | if (sock_flag(sk, SOCK_ZAPPED)) /* Must bind first - autobinding does not work */ | |
730 | goto out_put_neigh; | |
731 | ||
732 | if (!strcmp(x25->source_addr.x25_addr, null_x25_address.x25_addr)) | |
733 | memset(&x25->source_addr, '\0', X25_ADDR_LEN); | |
734 | ||
735 | x25->dest_addr = addr->sx25_addr; | |
736 | ||
737 | /* Move to connecting socket, start sending Connect Requests */ | |
738 | sock->state = SS_CONNECTING; | |
739 | sk->sk_state = TCP_SYN_SENT; | |
740 | ||
741 | x25->state = X25_STATE_1; | |
742 | ||
743 | x25_write_internal(sk, X25_CALL_REQUEST); | |
744 | ||
745 | x25_start_heartbeat(sk); | |
746 | x25_start_t21timer(sk); | |
747 | ||
748 | /* Now the loop */ | |
749 | rc = -EINPROGRESS; | |
750 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) | |
751 | goto out_put_neigh; | |
752 | ||
753 | rc = x25_wait_for_connection_establishment(sk); | |
754 | if (rc) | |
755 | goto out_put_neigh; | |
756 | ||
757 | sock->state = SS_CONNECTED; | |
758 | rc = 0; | |
759 | out_put_neigh: | |
760 | if (rc) | |
761 | x25_neigh_put(x25->neighbour); | |
762 | out_put_route: | |
763 | x25_route_put(rt); | |
764 | out: | |
765 | release_sock(sk); | |
766 | return rc; | |
767 | } | |
768 | ||
bac37ec8 | 769 | static int x25_wait_for_data(struct sock *sk, long timeout) |
1da177e4 LT |
770 | { |
771 | DECLARE_WAITQUEUE(wait, current); | |
772 | int rc = 0; | |
773 | ||
774 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
775 | for (;;) { | |
776 | __set_current_state(TASK_INTERRUPTIBLE); | |
777 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
778 | break; | |
779 | rc = -ERESTARTSYS; | |
780 | if (signal_pending(current)) | |
781 | break; | |
782 | rc = -EAGAIN; | |
783 | if (!timeout) | |
784 | break; | |
785 | rc = 0; | |
786 | if (skb_queue_empty(&sk->sk_receive_queue)) { | |
787 | release_sock(sk); | |
788 | timeout = schedule_timeout(timeout); | |
789 | lock_sock(sk); | |
790 | } else | |
791 | break; | |
792 | } | |
793 | __set_current_state(TASK_RUNNING); | |
794 | remove_wait_queue(sk->sk_sleep, &wait); | |
795 | return rc; | |
796 | } | |
f8e1d201 | 797 | |
1da177e4 LT |
798 | static int x25_accept(struct socket *sock, struct socket *newsock, int flags) |
799 | { | |
800 | struct sock *sk = sock->sk; | |
801 | struct sock *newsk; | |
802 | struct sk_buff *skb; | |
803 | int rc = -EINVAL; | |
804 | ||
805 | if (!sk || sk->sk_state != TCP_LISTEN) | |
806 | goto out; | |
807 | ||
808 | rc = -EOPNOTSUPP; | |
809 | if (sk->sk_type != SOCK_SEQPACKET) | |
810 | goto out; | |
811 | ||
812 | lock_sock(sk); | |
813 | rc = x25_wait_for_data(sk, sk->sk_rcvtimeo); | |
814 | if (rc) | |
815 | goto out2; | |
816 | skb = skb_dequeue(&sk->sk_receive_queue); | |
817 | rc = -EINVAL; | |
818 | if (!skb->sk) | |
819 | goto out2; | |
820 | newsk = skb->sk; | |
b61d38e0 | 821 | sock_graft(newsk, newsock); |
1da177e4 LT |
822 | |
823 | /* Now attach up the new socket */ | |
824 | skb->sk = NULL; | |
825 | kfree_skb(skb); | |
826 | sk->sk_ack_backlog--; | |
1da177e4 LT |
827 | newsock->state = SS_CONNECTED; |
828 | rc = 0; | |
829 | out2: | |
830 | release_sock(sk); | |
831 | out: | |
832 | return rc; | |
833 | } | |
834 | ||
835 | static int x25_getname(struct socket *sock, struct sockaddr *uaddr, | |
836 | int *uaddr_len, int peer) | |
837 | { | |
838 | struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)uaddr; | |
839 | struct sock *sk = sock->sk; | |
840 | struct x25_sock *x25 = x25_sk(sk); | |
841 | ||
842 | if (peer) { | |
843 | if (sk->sk_state != TCP_ESTABLISHED) | |
844 | return -ENOTCONN; | |
845 | sx25->sx25_addr = x25->dest_addr; | |
846 | } else | |
847 | sx25->sx25_addr = x25->source_addr; | |
848 | ||
849 | sx25->sx25_family = AF_X25; | |
850 | *uaddr_len = sizeof(*sx25); | |
851 | ||
852 | return 0; | |
853 | } | |
f8e1d201 | 854 | |
1da177e4 LT |
855 | int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *nb, |
856 | unsigned int lci) | |
857 | { | |
858 | struct sock *sk; | |
859 | struct sock *make; | |
860 | struct x25_sock *makex25; | |
861 | struct x25_address source_addr, dest_addr; | |
862 | struct x25_facilities facilities; | |
a64b7b93 | 863 | struct x25_dte_facilities dte_facilities; |
95a9dc43 | 864 | int len, addr_len, rc; |
1da177e4 LT |
865 | |
866 | /* | |
867 | * Remove the LCI and frame type. | |
868 | */ | |
869 | skb_pull(skb, X25_STD_MIN_LEN); | |
870 | ||
871 | /* | |
872 | * Extract the X.25 addresses and convert them to ASCII strings, | |
873 | * and remove them. | |
874 | */ | |
95a9dc43 AH |
875 | addr_len = x25_addr_ntoa(skb->data, &source_addr, &dest_addr); |
876 | skb_pull(skb, addr_len); | |
1da177e4 LT |
877 | |
878 | /* | |
879 | * Get the length of the facilities, skip past them for the moment | |
880 | * get the call user data because this is needed to determine | |
881 | * the correct listener | |
882 | */ | |
883 | len = skb->data[0] + 1; | |
884 | skb_pull(skb,len); | |
885 | ||
1da177e4 LT |
886 | /* |
887 | * Find a listener for the particular address/cud pair. | |
888 | */ | |
cb65d506 SP |
889 | sk = x25_find_listener(&source_addr,skb); |
890 | skb_push(skb,len); | |
1da177e4 | 891 | |
95a9dc43 AH |
892 | if (sk != NULL && sk_acceptq_is_full(sk)) { |
893 | goto out_sock_put; | |
894 | } | |
895 | ||
1da177e4 | 896 | /* |
95a9dc43 AH |
897 | * We dont have any listeners for this incoming call. |
898 | * Try forwarding it. | |
1da177e4 | 899 | */ |
95a9dc43 AH |
900 | if (sk == NULL) { |
901 | skb_push(skb, addr_len + X25_STD_MIN_LEN); | |
39e21c0d AH |
902 | if (sysctl_x25_forward && |
903 | x25_forward_call(&dest_addr, nb, skb, lci) > 0) | |
95a9dc43 AH |
904 | { |
905 | /* Call was forwarded, dont process it any more */ | |
906 | kfree_skb(skb); | |
907 | rc = 1; | |
908 | goto out; | |
909 | } else { | |
910 | /* No listeners, can't forward, clear the call */ | |
911 | goto out_clear_request; | |
912 | } | |
913 | } | |
1da177e4 LT |
914 | |
915 | /* | |
916 | * Try to reach a compromise on the requested facilities. | |
917 | */ | |
a64b7b93 SP |
918 | len = x25_negotiate_facilities(skb, sk, &facilities, &dte_facilities); |
919 | if (len == -1) | |
1da177e4 LT |
920 | goto out_sock_put; |
921 | ||
922 | /* | |
923 | * current neighbour/link might impose additional limits | |
924 | * on certain facilties | |
925 | */ | |
926 | ||
927 | x25_limit_facilities(&facilities, nb); | |
928 | ||
929 | /* | |
930 | * Try to create a new socket. | |
931 | */ | |
932 | make = x25_make_new(sk); | |
933 | if (!make) | |
934 | goto out_sock_put; | |
935 | ||
936 | /* | |
937 | * Remove the facilities | |
938 | */ | |
939 | skb_pull(skb, len); | |
940 | ||
941 | skb->sk = make; | |
942 | make->sk_state = TCP_ESTABLISHED; | |
943 | ||
944 | makex25 = x25_sk(make); | |
945 | makex25->lci = lci; | |
946 | makex25->dest_addr = dest_addr; | |
947 | makex25->source_addr = source_addr; | |
948 | makex25->neighbour = nb; | |
949 | makex25->facilities = facilities; | |
a64b7b93 | 950 | makex25->dte_facilities= dte_facilities; |
1da177e4 | 951 | makex25->vc_facil_mask = x25_sk(sk)->vc_facil_mask; |
cb65d506 SP |
952 | /* ensure no reverse facil on accept */ |
953 | makex25->vc_facil_mask &= ~X25_MASK_REVERSE; | |
a64b7b93 SP |
954 | /* ensure no calling address extension on accept */ |
955 | makex25->vc_facil_mask &= ~X25_MASK_CALLING_AE; | |
cb65d506 | 956 | makex25->cudmatchlength = x25_sk(sk)->cudmatchlength; |
1da177e4 | 957 | |
ebc3f64b SP |
958 | /* Normally all calls are accepted immediatly */ |
959 | if(makex25->accptapprv & X25_DENY_ACCPT_APPRV) { | |
960 | x25_write_internal(make, X25_CALL_ACCEPTED); | |
961 | makex25->state = X25_STATE_3; | |
962 | } | |
1da177e4 | 963 | |
cb65d506 SP |
964 | /* |
965 | * Incoming Call User Data. | |
966 | */ | |
8db09f26 RK |
967 | skb_copy_from_linear_data(skb, makex25->calluserdata.cuddata, skb->len); |
968 | makex25->calluserdata.cudlength = skb->len; | |
cb65d506 | 969 | |
1da177e4 LT |
970 | sk->sk_ack_backlog++; |
971 | ||
972 | x25_insert_socket(make); | |
973 | ||
974 | skb_queue_head(&sk->sk_receive_queue, skb); | |
975 | ||
976 | x25_start_heartbeat(make); | |
977 | ||
978 | if (!sock_flag(sk, SOCK_DEAD)) | |
979 | sk->sk_data_ready(sk, skb->len); | |
980 | rc = 1; | |
981 | sock_put(sk); | |
982 | out: | |
983 | return rc; | |
984 | out_sock_put: | |
985 | sock_put(sk); | |
986 | out_clear_request: | |
987 | rc = 0; | |
988 | x25_transmit_clear_request(nb, lci, 0x01); | |
989 | goto out; | |
990 | } | |
991 | ||
992 | static int x25_sendmsg(struct kiocb *iocb, struct socket *sock, | |
993 | struct msghdr *msg, size_t len) | |
994 | { | |
995 | struct sock *sk = sock->sk; | |
996 | struct x25_sock *x25 = x25_sk(sk); | |
997 | struct sockaddr_x25 *usx25 = (struct sockaddr_x25 *)msg->msg_name; | |
998 | struct sockaddr_x25 sx25; | |
999 | struct sk_buff *skb; | |
1000 | unsigned char *asmptr; | |
1001 | int noblock = msg->msg_flags & MSG_DONTWAIT; | |
1002 | size_t size; | |
1003 | int qbit = 0, rc = -EINVAL; | |
1004 | ||
1005 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_OOB|MSG_EOR|MSG_CMSG_COMPAT)) | |
1006 | goto out; | |
1007 | ||
1008 | /* we currently don't support segmented records at the user interface */ | |
1009 | if (!(msg->msg_flags & (MSG_EOR|MSG_OOB))) | |
1010 | goto out; | |
1011 | ||
1012 | rc = -EADDRNOTAVAIL; | |
1013 | if (sock_flag(sk, SOCK_ZAPPED)) | |
1014 | goto out; | |
1015 | ||
1016 | rc = -EPIPE; | |
1017 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1018 | send_sig(SIGPIPE, current, 0); | |
1019 | goto out; | |
1020 | } | |
1021 | ||
1022 | rc = -ENETUNREACH; | |
1023 | if (!x25->neighbour) | |
1024 | goto out; | |
1025 | ||
1026 | if (usx25) { | |
1027 | rc = -EINVAL; | |
1028 | if (msg->msg_namelen < sizeof(sx25)) | |
1029 | goto out; | |
1030 | memcpy(&sx25, usx25, sizeof(sx25)); | |
1031 | rc = -EISCONN; | |
1032 | if (strcmp(x25->dest_addr.x25_addr, sx25.sx25_addr.x25_addr)) | |
1033 | goto out; | |
1034 | rc = -EINVAL; | |
1035 | if (sx25.sx25_family != AF_X25) | |
1036 | goto out; | |
1037 | } else { | |
1038 | /* | |
1039 | * FIXME 1003.1g - if the socket is like this because | |
1040 | * it has become closed (not started closed) we ought | |
1041 | * to SIGPIPE, EPIPE; | |
1042 | */ | |
1043 | rc = -ENOTCONN; | |
1044 | if (sk->sk_state != TCP_ESTABLISHED) | |
1045 | goto out; | |
1046 | ||
1047 | sx25.sx25_family = AF_X25; | |
1048 | sx25.sx25_addr = x25->dest_addr; | |
1049 | } | |
1050 | ||
83e0bbcb AC |
1051 | /* Sanity check the packet size */ |
1052 | if (len > 65535) { | |
1053 | rc = -EMSGSIZE; | |
1054 | goto out; | |
1055 | } | |
1056 | ||
1da177e4 LT |
1057 | SOCK_DEBUG(sk, "x25_sendmsg: sendto: Addresses built.\n"); |
1058 | ||
1059 | /* Build a packet */ | |
1060 | SOCK_DEBUG(sk, "x25_sendmsg: sendto: building packet.\n"); | |
1061 | ||
1062 | if ((msg->msg_flags & MSG_OOB) && len > 32) | |
1063 | len = 32; | |
1064 | ||
1065 | size = len + X25_MAX_L2_LEN + X25_EXT_MIN_LEN; | |
1066 | ||
1067 | skb = sock_alloc_send_skb(sk, size, noblock, &rc); | |
1068 | if (!skb) | |
1069 | goto out; | |
1070 | X25_SKB_CB(skb)->flags = msg->msg_flags; | |
1071 | ||
1072 | skb_reserve(skb, X25_MAX_L2_LEN + X25_EXT_MIN_LEN); | |
1073 | ||
1074 | /* | |
1075 | * Put the data on the end | |
1076 | */ | |
1077 | SOCK_DEBUG(sk, "x25_sendmsg: Copying user data\n"); | |
1078 | ||
eeeb0374 ACM |
1079 | skb_reset_transport_header(skb); |
1080 | skb_put(skb, len); | |
1da177e4 | 1081 | |
eeeb0374 | 1082 | rc = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len); |
1da177e4 LT |
1083 | if (rc) |
1084 | goto out_kfree_skb; | |
1085 | ||
1086 | /* | |
1087 | * If the Q BIT Include socket option is in force, the first | |
1088 | * byte of the user data is the logical value of the Q Bit. | |
1089 | */ | |
1090 | if (x25->qbitincl) { | |
1091 | qbit = skb->data[0]; | |
1092 | skb_pull(skb, 1); | |
1093 | } | |
1094 | ||
1095 | /* | |
1096 | * Push down the X.25 header | |
1097 | */ | |
1098 | SOCK_DEBUG(sk, "x25_sendmsg: Building X.25 Header.\n"); | |
1099 | ||
1100 | if (msg->msg_flags & MSG_OOB) { | |
1101 | if (x25->neighbour->extended) { | |
1102 | asmptr = skb_push(skb, X25_STD_MIN_LEN); | |
1103 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ; | |
1104 | *asmptr++ = (x25->lci >> 0) & 0xFF; | |
1105 | *asmptr++ = X25_INTERRUPT; | |
1106 | } else { | |
1107 | asmptr = skb_push(skb, X25_STD_MIN_LEN); | |
1108 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ; | |
1109 | *asmptr++ = (x25->lci >> 0) & 0xFF; | |
1110 | *asmptr++ = X25_INTERRUPT; | |
1111 | } | |
1112 | } else { | |
1113 | if (x25->neighbour->extended) { | |
1114 | /* Build an Extended X.25 header */ | |
1115 | asmptr = skb_push(skb, X25_EXT_MIN_LEN); | |
1116 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ; | |
1117 | *asmptr++ = (x25->lci >> 0) & 0xFF; | |
1118 | *asmptr++ = X25_DATA; | |
1119 | *asmptr++ = X25_DATA; | |
1120 | } else { | |
1121 | /* Build an Standard X.25 header */ | |
1122 | asmptr = skb_push(skb, X25_STD_MIN_LEN); | |
1123 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ; | |
1124 | *asmptr++ = (x25->lci >> 0) & 0xFF; | |
1125 | *asmptr++ = X25_DATA; | |
1126 | } | |
1127 | ||
1128 | if (qbit) | |
1129 | skb->data[0] |= X25_Q_BIT; | |
1130 | } | |
1131 | ||
1132 | SOCK_DEBUG(sk, "x25_sendmsg: Built header.\n"); | |
1133 | SOCK_DEBUG(sk, "x25_sendmsg: Transmitting buffer\n"); | |
1134 | ||
1135 | rc = -ENOTCONN; | |
1136 | if (sk->sk_state != TCP_ESTABLISHED) | |
1137 | goto out_kfree_skb; | |
1138 | ||
1139 | if (msg->msg_flags & MSG_OOB) | |
1140 | skb_queue_tail(&x25->interrupt_out_queue, skb); | |
1141 | else { | |
8db09f26 RK |
1142 | rc = x25_output(sk, skb); |
1143 | len = rc; | |
1144 | if (rc < 0) | |
1da177e4 LT |
1145 | kfree_skb(skb); |
1146 | else if (x25->qbitincl) | |
1147 | len++; | |
1148 | } | |
1149 | ||
1150 | /* | |
1151 | * lock_sock() is currently only used to serialize this x25_kick() | |
1152 | * against input-driven x25_kick() calls. It currently only blocks | |
1153 | * incoming packets for this socket and does not protect against | |
1154 | * any other socket state changes and is not called from anywhere | |
1155 | * else. As x25_kick() cannot block and as long as all socket | |
1156 | * operations are BKL-wrapped, we don't need take to care about | |
1157 | * purging the backlog queue in x25_release(). | |
1158 | * | |
1159 | * Using lock_sock() to protect all socket operations entirely | |
1160 | * (and making the whole x25 stack SMP aware) unfortunately would | |
1161 | * require major changes to {send,recv}msg and skb allocation methods. | |
1162 | * -> 2.5 ;) | |
1163 | */ | |
1164 | lock_sock(sk); | |
1165 | x25_kick(sk); | |
1166 | release_sock(sk); | |
1167 | rc = len; | |
1168 | out: | |
1169 | return rc; | |
1170 | out_kfree_skb: | |
1171 | kfree_skb(skb); | |
1172 | goto out; | |
1173 | } | |
1174 | ||
1175 | ||
1176 | static int x25_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1177 | struct msghdr *msg, size_t size, | |
1178 | int flags) | |
1179 | { | |
1180 | struct sock *sk = sock->sk; | |
1181 | struct x25_sock *x25 = x25_sk(sk); | |
1182 | struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name; | |
1183 | size_t copied; | |
1184 | int qbit; | |
1185 | struct sk_buff *skb; | |
1186 | unsigned char *asmptr; | |
1187 | int rc = -ENOTCONN; | |
1188 | ||
1189 | /* | |
1190 | * This works for seqpacket too. The receiver has ordered the queue for | |
1191 | * us! We do one quick check first though | |
1192 | */ | |
1193 | if (sk->sk_state != TCP_ESTABLISHED) | |
1194 | goto out; | |
1195 | ||
1196 | if (flags & MSG_OOB) { | |
1197 | rc = -EINVAL; | |
1198 | if (sock_flag(sk, SOCK_URGINLINE) || | |
1199 | !skb_peek(&x25->interrupt_in_queue)) | |
1200 | goto out; | |
1201 | ||
1202 | skb = skb_dequeue(&x25->interrupt_in_queue); | |
1203 | ||
1204 | skb_pull(skb, X25_STD_MIN_LEN); | |
1205 | ||
1206 | /* | |
1207 | * No Q bit information on Interrupt data. | |
1208 | */ | |
1209 | if (x25->qbitincl) { | |
1210 | asmptr = skb_push(skb, 1); | |
1211 | *asmptr = 0x00; | |
1212 | } | |
1213 | ||
1214 | msg->msg_flags |= MSG_OOB; | |
1215 | } else { | |
1216 | /* Now we can treat all alike */ | |
1217 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, | |
1218 | flags & MSG_DONTWAIT, &rc); | |
1219 | if (!skb) | |
1220 | goto out; | |
1221 | ||
1222 | qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT; | |
1223 | ||
1224 | skb_pull(skb, x25->neighbour->extended ? | |
1225 | X25_EXT_MIN_LEN : X25_STD_MIN_LEN); | |
1226 | ||
1227 | if (x25->qbitincl) { | |
1228 | asmptr = skb_push(skb, 1); | |
1229 | *asmptr = qbit; | |
1230 | } | |
1231 | } | |
1232 | ||
badff6d0 | 1233 | skb_reset_transport_header(skb); |
1da177e4 LT |
1234 | copied = skb->len; |
1235 | ||
1236 | if (copied > size) { | |
1237 | copied = size; | |
1238 | msg->msg_flags |= MSG_TRUNC; | |
1239 | } | |
1240 | ||
f8e1d201 | 1241 | /* Currently, each datagram always contains a complete record */ |
1da177e4 LT |
1242 | msg->msg_flags |= MSG_EOR; |
1243 | ||
1244 | rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
1245 | if (rc) | |
1246 | goto out_free_dgram; | |
1247 | ||
1248 | if (sx25) { | |
1249 | sx25->sx25_family = AF_X25; | |
1250 | sx25->sx25_addr = x25->dest_addr; | |
1251 | } | |
1252 | ||
1253 | msg->msg_namelen = sizeof(struct sockaddr_x25); | |
1254 | ||
1255 | lock_sock(sk); | |
1256 | x25_check_rbuf(sk); | |
1257 | release_sock(sk); | |
1258 | rc = copied; | |
1259 | out_free_dgram: | |
1260 | skb_free_datagram(sk, skb); | |
1261 | out: | |
1262 | return rc; | |
1263 | } | |
1264 | ||
1265 | ||
1266 | static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1267 | { | |
1268 | struct sock *sk = sock->sk; | |
1269 | struct x25_sock *x25 = x25_sk(sk); | |
1270 | void __user *argp = (void __user *)arg; | |
1271 | int rc; | |
1272 | ||
1273 | switch (cmd) { | |
1274 | case TIOCOUTQ: { | |
31e6d363 ED |
1275 | int amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
1276 | ||
1da177e4 LT |
1277 | if (amount < 0) |
1278 | amount = 0; | |
1279 | rc = put_user(amount, (unsigned int __user *)argp); | |
1280 | break; | |
1281 | } | |
1282 | ||
1283 | case TIOCINQ: { | |
1284 | struct sk_buff *skb; | |
1285 | int amount = 0; | |
1286 | /* | |
1287 | * These two are safe on a single CPU system as | |
1288 | * only user tasks fiddle here | |
1289 | */ | |
1290 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) | |
1291 | amount = skb->len; | |
1292 | rc = put_user(amount, (unsigned int __user *)argp); | |
1293 | break; | |
1294 | } | |
1295 | ||
1296 | case SIOCGSTAMP: | |
1297 | rc = -EINVAL; | |
1298 | if (sk) | |
f8e1d201 YH |
1299 | rc = sock_get_timestamp(sk, |
1300 | (struct timeval __user *)argp); | |
1da177e4 | 1301 | break; |
ae40eb1e ED |
1302 | case SIOCGSTAMPNS: |
1303 | rc = -EINVAL; | |
1304 | if (sk) | |
1305 | rc = sock_get_timestampns(sk, | |
1306 | (struct timespec __user *)argp); | |
1307 | break; | |
1da177e4 LT |
1308 | case SIOCGIFADDR: |
1309 | case SIOCSIFADDR: | |
1310 | case SIOCGIFDSTADDR: | |
1311 | case SIOCSIFDSTADDR: | |
1312 | case SIOCGIFBRDADDR: | |
1313 | case SIOCSIFBRDADDR: | |
1314 | case SIOCGIFNETMASK: | |
1315 | case SIOCSIFNETMASK: | |
1316 | case SIOCGIFMETRIC: | |
1317 | case SIOCSIFMETRIC: | |
1318 | rc = -EINVAL; | |
1319 | break; | |
1320 | case SIOCADDRT: | |
1321 | case SIOCDELRT: | |
1322 | rc = -EPERM; | |
1323 | if (!capable(CAP_NET_ADMIN)) | |
1324 | break; | |
1325 | rc = x25_route_ioctl(cmd, argp); | |
1326 | break; | |
1327 | case SIOCX25GSUBSCRIP: | |
1328 | rc = x25_subscr_ioctl(cmd, argp); | |
1329 | break; | |
1330 | case SIOCX25SSUBSCRIP: | |
1331 | rc = -EPERM; | |
1332 | if (!capable(CAP_NET_ADMIN)) | |
1333 | break; | |
1334 | rc = x25_subscr_ioctl(cmd, argp); | |
1335 | break; | |
1336 | case SIOCX25GFACILITIES: { | |
1337 | struct x25_facilities fac = x25->facilities; | |
1338 | rc = copy_to_user(argp, &fac, | |
1339 | sizeof(fac)) ? -EFAULT : 0; | |
1340 | break; | |
1341 | } | |
1342 | ||
1343 | case SIOCX25SFACILITIES: { | |
1344 | struct x25_facilities facilities; | |
1345 | rc = -EFAULT; | |
1346 | if (copy_from_user(&facilities, argp, | |
1347 | sizeof(facilities))) | |
1348 | break; | |
1349 | rc = -EINVAL; | |
1350 | if (sk->sk_state != TCP_LISTEN && | |
1351 | sk->sk_state != TCP_CLOSE) | |
1352 | break; | |
1353 | if (facilities.pacsize_in < X25_PS16 || | |
1354 | facilities.pacsize_in > X25_PS4096) | |
1355 | break; | |
1356 | if (facilities.pacsize_out < X25_PS16 || | |
1357 | facilities.pacsize_out > X25_PS4096) | |
1358 | break; | |
1359 | if (facilities.winsize_in < 1 || | |
1360 | facilities.winsize_in > 127) | |
1361 | break; | |
1362 | if (facilities.throughput < 0x03 || | |
1363 | facilities.throughput > 0xDD) | |
1364 | break; | |
ebc3f64b SP |
1365 | if (facilities.reverse && |
1366 | (facilities.reverse | 0x81)!= 0x81) | |
1da177e4 LT |
1367 | break; |
1368 | x25->facilities = facilities; | |
1369 | rc = 0; | |
1370 | break; | |
1371 | } | |
1372 | ||
a64b7b93 | 1373 | case SIOCX25GDTEFACILITIES: { |
f8e1d201 | 1374 | rc = copy_to_user(argp, &x25->dte_facilities, |
a64b7b93 SP |
1375 | sizeof(x25->dte_facilities)); |
1376 | if (rc) | |
1377 | rc = -EFAULT; | |
f8e1d201 YH |
1378 | break; |
1379 | } | |
a64b7b93 | 1380 | |
f8e1d201 YH |
1381 | case SIOCX25SDTEFACILITIES: { |
1382 | struct x25_dte_facilities dtefacs; | |
1383 | rc = -EFAULT; | |
1384 | if (copy_from_user(&dtefacs, argp, sizeof(dtefacs))) | |
a64b7b93 SP |
1385 | break; |
1386 | rc = -EINVAL; | |
1387 | if (sk->sk_state != TCP_LISTEN && | |
1388 | sk->sk_state != TCP_CLOSE) | |
1389 | break; | |
1390 | if (dtefacs.calling_len > X25_MAX_AE_LEN) | |
1391 | break; | |
1392 | if (dtefacs.calling_ae == NULL) | |
1393 | break; | |
1394 | if (dtefacs.called_len > X25_MAX_AE_LEN) | |
1395 | break; | |
1396 | if (dtefacs.called_ae == NULL) | |
1397 | break; | |
1398 | x25->dte_facilities = dtefacs; | |
1399 | rc = 0; | |
1400 | break; | |
1401 | } | |
1402 | ||
1da177e4 LT |
1403 | case SIOCX25GCALLUSERDATA: { |
1404 | struct x25_calluserdata cud = x25->calluserdata; | |
1405 | rc = copy_to_user(argp, &cud, | |
1406 | sizeof(cud)) ? -EFAULT : 0; | |
1407 | break; | |
1408 | } | |
1409 | ||
1410 | case SIOCX25SCALLUSERDATA: { | |
1411 | struct x25_calluserdata calluserdata; | |
1412 | ||
1413 | rc = -EFAULT; | |
1414 | if (copy_from_user(&calluserdata, argp, | |
1415 | sizeof(calluserdata))) | |
1416 | break; | |
1417 | rc = -EINVAL; | |
1418 | if (calluserdata.cudlength > X25_MAX_CUD_LEN) | |
1419 | break; | |
1420 | x25->calluserdata = calluserdata; | |
1421 | rc = 0; | |
1422 | break; | |
1423 | } | |
1424 | ||
1425 | case SIOCX25GCAUSEDIAG: { | |
1426 | struct x25_causediag causediag; | |
1427 | causediag = x25->causediag; | |
1428 | rc = copy_to_user(argp, &causediag, | |
1429 | sizeof(causediag)) ? -EFAULT : 0; | |
1430 | break; | |
1431 | } | |
1432 | ||
cb65d506 SP |
1433 | case SIOCX25SCUDMATCHLEN: { |
1434 | struct x25_subaddr sub_addr; | |
1435 | rc = -EINVAL; | |
1436 | if(sk->sk_state != TCP_CLOSE) | |
1437 | break; | |
1438 | rc = -EFAULT; | |
1439 | if (copy_from_user(&sub_addr, argp, | |
1440 | sizeof(sub_addr))) | |
1441 | break; | |
f8e1d201 | 1442 | rc = -EINVAL; |
cb65d506 SP |
1443 | if(sub_addr.cudmatchlength > X25_MAX_CUD_LEN) |
1444 | break; | |
1445 | x25->cudmatchlength = sub_addr.cudmatchlength; | |
1446 | rc = 0; | |
1447 | break; | |
1448 | } | |
1449 | ||
ebc3f64b SP |
1450 | case SIOCX25CALLACCPTAPPRV: { |
1451 | rc = -EINVAL; | |
1452 | if (sk->sk_state != TCP_CLOSE) | |
1453 | break; | |
1454 | x25->accptapprv = X25_ALLOW_ACCPT_APPRV; | |
1455 | rc = 0; | |
1456 | break; | |
1457 | } | |
1458 | ||
1459 | case SIOCX25SENDCALLACCPT: { | |
1460 | rc = -EINVAL; | |
1461 | if (sk->sk_state != TCP_ESTABLISHED) | |
1462 | break; | |
1463 | if (x25->accptapprv) /* must call accptapprv above */ | |
1464 | break; | |
1465 | x25_write_internal(sk, X25_CALL_ACCEPTED); | |
1466 | x25->state = X25_STATE_3; | |
1467 | rc = 0; | |
1468 | break; | |
1469 | } | |
1470 | ||
f8e1d201 | 1471 | default: |
b5e5fa5e | 1472 | rc = -ENOIOCTLCMD; |
1da177e4 LT |
1473 | break; |
1474 | } | |
1475 | ||
1476 | return rc; | |
1477 | } | |
1478 | ||
ec1b4cf7 | 1479 | static const struct net_proto_family x25_family_ops = { |
1da177e4 LT |
1480 | .family = AF_X25, |
1481 | .create = x25_create, | |
1482 | .owner = THIS_MODULE, | |
1483 | }; | |
1484 | ||
1b06e6ba SP |
1485 | #ifdef CONFIG_COMPAT |
1486 | static int compat_x25_subscr_ioctl(unsigned int cmd, | |
1487 | struct compat_x25_subscrip_struct __user *x25_subscr32) | |
1488 | { | |
1489 | struct compat_x25_subscrip_struct x25_subscr; | |
1490 | struct x25_neigh *nb; | |
1491 | struct net_device *dev; | |
1492 | int rc = -EINVAL; | |
1493 | ||
1494 | rc = -EFAULT; | |
1495 | if (copy_from_user(&x25_subscr, x25_subscr32, sizeof(*x25_subscr32))) | |
1496 | goto out; | |
1497 | ||
1498 | rc = -EINVAL; | |
1499 | dev = x25_dev_get(x25_subscr.device); | |
1500 | if (dev == NULL) | |
1501 | goto out; | |
1502 | ||
1503 | nb = x25_get_neigh(dev); | |
1504 | if (nb == NULL) | |
1505 | goto out_dev_put; | |
1506 | ||
1507 | dev_put(dev); | |
1508 | ||
1509 | if (cmd == SIOCX25GSUBSCRIP) { | |
1510 | x25_subscr.extended = nb->extended; | |
1511 | x25_subscr.global_facil_mask = nb->global_facil_mask; | |
1512 | rc = copy_to_user(x25_subscr32, &x25_subscr, | |
1513 | sizeof(*x25_subscr32)) ? -EFAULT : 0; | |
1514 | } else { | |
1515 | rc = -EINVAL; | |
1516 | if (x25_subscr.extended == 0 || x25_subscr.extended == 1) { | |
1517 | rc = 0; | |
1518 | nb->extended = x25_subscr.extended; | |
1519 | nb->global_facil_mask = x25_subscr.global_facil_mask; | |
1520 | } | |
1521 | } | |
1522 | x25_neigh_put(nb); | |
1523 | out: | |
1524 | return rc; | |
1525 | out_dev_put: | |
1526 | dev_put(dev); | |
1527 | goto out; | |
1528 | } | |
1529 | ||
1530 | static int compat_x25_ioctl(struct socket *sock, unsigned int cmd, | |
1531 | unsigned long arg) | |
1532 | { | |
1533 | void __user *argp = compat_ptr(arg); | |
1534 | struct sock *sk = sock->sk; | |
1535 | ||
1536 | int rc = -ENOIOCTLCMD; | |
1537 | ||
1538 | switch(cmd) { | |
1539 | case TIOCOUTQ: | |
1540 | case TIOCINQ: | |
1541 | rc = x25_ioctl(sock, cmd, (unsigned long)argp); | |
1542 | break; | |
1543 | case SIOCGSTAMP: | |
1544 | rc = -EINVAL; | |
1545 | if (sk) | |
1546 | rc = compat_sock_get_timestamp(sk, | |
1547 | (struct timeval __user*)argp); | |
1548 | break; | |
ae40eb1e ED |
1549 | case SIOCGSTAMPNS: |
1550 | rc = -EINVAL; | |
1551 | if (sk) | |
1552 | rc = compat_sock_get_timestampns(sk, | |
1553 | (struct timespec __user*)argp); | |
1554 | break; | |
1b06e6ba SP |
1555 | case SIOCGIFADDR: |
1556 | case SIOCSIFADDR: | |
1557 | case SIOCGIFDSTADDR: | |
1558 | case SIOCSIFDSTADDR: | |
1559 | case SIOCGIFBRDADDR: | |
1560 | case SIOCSIFBRDADDR: | |
1561 | case SIOCGIFNETMASK: | |
1562 | case SIOCSIFNETMASK: | |
1563 | case SIOCGIFMETRIC: | |
1564 | case SIOCSIFMETRIC: | |
1565 | rc = -EINVAL; | |
1566 | break; | |
1567 | case SIOCADDRT: | |
1568 | case SIOCDELRT: | |
1569 | rc = -EPERM; | |
1570 | if (!capable(CAP_NET_ADMIN)) | |
1571 | break; | |
1572 | rc = x25_route_ioctl(cmd, argp); | |
1573 | break; | |
1574 | case SIOCX25GSUBSCRIP: | |
1575 | rc = compat_x25_subscr_ioctl(cmd, argp); | |
1576 | break; | |
1577 | case SIOCX25SSUBSCRIP: | |
1578 | rc = -EPERM; | |
1579 | if (!capable(CAP_NET_ADMIN)) | |
1580 | break; | |
1581 | rc = compat_x25_subscr_ioctl(cmd, argp); | |
1582 | break; | |
1583 | case SIOCX25GFACILITIES: | |
1584 | case SIOCX25SFACILITIES: | |
9a6b9f2e SP |
1585 | case SIOCX25GDTEFACILITIES: |
1586 | case SIOCX25SDTEFACILITIES: | |
1b06e6ba SP |
1587 | case SIOCX25GCALLUSERDATA: |
1588 | case SIOCX25SCALLUSERDATA: | |
1589 | case SIOCX25GCAUSEDIAG: | |
1590 | case SIOCX25SCUDMATCHLEN: | |
1591 | case SIOCX25CALLACCPTAPPRV: | |
1592 | case SIOCX25SENDCALLACCPT: | |
1593 | rc = x25_ioctl(sock, cmd, (unsigned long)argp); | |
1594 | break; | |
1595 | default: | |
1596 | rc = -ENOIOCTLCMD; | |
1597 | break; | |
1598 | } | |
1599 | return rc; | |
1600 | } | |
1601 | #endif | |
1602 | ||
90ddc4f0 | 1603 | static const struct proto_ops SOCKOPS_WRAPPED(x25_proto_ops) = { |
1da177e4 LT |
1604 | .family = AF_X25, |
1605 | .owner = THIS_MODULE, | |
1606 | .release = x25_release, | |
1607 | .bind = x25_bind, | |
1608 | .connect = x25_connect, | |
1609 | .socketpair = sock_no_socketpair, | |
1610 | .accept = x25_accept, | |
1611 | .getname = x25_getname, | |
1612 | .poll = datagram_poll, | |
1613 | .ioctl = x25_ioctl, | |
1b06e6ba SP |
1614 | #ifdef CONFIG_COMPAT |
1615 | .compat_ioctl = compat_x25_ioctl, | |
1616 | #endif | |
1da177e4 LT |
1617 | .listen = x25_listen, |
1618 | .shutdown = sock_no_shutdown, | |
1619 | .setsockopt = x25_setsockopt, | |
1620 | .getsockopt = x25_getsockopt, | |
1621 | .sendmsg = x25_sendmsg, | |
1622 | .recvmsg = x25_recvmsg, | |
1623 | .mmap = sock_no_mmap, | |
1624 | .sendpage = sock_no_sendpage, | |
1625 | }; | |
1626 | ||
1da177e4 LT |
1627 | SOCKOPS_WRAP(x25_proto, AF_X25); |
1628 | ||
7546dd97 | 1629 | static struct packet_type x25_packet_type __read_mostly = { |
09640e63 | 1630 | .type = cpu_to_be16(ETH_P_X25), |
1da177e4 LT |
1631 | .func = x25_lapb_receive_frame, |
1632 | }; | |
1633 | ||
1634 | static struct notifier_block x25_dev_notifier = { | |
1635 | .notifier_call = x25_device_event, | |
1636 | }; | |
1637 | ||
1638 | void x25_kill_by_neigh(struct x25_neigh *nb) | |
1639 | { | |
1640 | struct sock *s; | |
1641 | struct hlist_node *node; | |
1642 | ||
1643 | write_lock_bh(&x25_list_lock); | |
1644 | ||
1645 | sk_for_each(s, node, &x25_list) | |
1646 | if (x25_sk(s)->neighbour == nb) | |
1647 | x25_disconnect(s, ENETUNREACH, 0, 0); | |
1648 | ||
1649 | write_unlock_bh(&x25_list_lock); | |
95a9dc43 AH |
1650 | |
1651 | /* Remove any related forwards */ | |
1652 | x25_clear_forward_by_dev(nb->dev); | |
1da177e4 LT |
1653 | } |
1654 | ||
1655 | static int __init x25_init(void) | |
1656 | { | |
1657 | int rc = proto_register(&x25_proto, 0); | |
1658 | ||
1659 | if (rc != 0) | |
1660 | goto out; | |
1661 | ||
1662 | sock_register(&x25_family_ops); | |
1663 | ||
1664 | dev_add_pack(&x25_packet_type); | |
1665 | ||
1666 | register_netdevice_notifier(&x25_dev_notifier); | |
1667 | ||
a44562e4 | 1668 | printk(KERN_INFO "X.25 for Linux Version 0.2\n"); |
1da177e4 LT |
1669 | |
1670 | #ifdef CONFIG_SYSCTL | |
1671 | x25_register_sysctl(); | |
1672 | #endif | |
1673 | x25_proc_init(); | |
1674 | out: | |
1675 | return rc; | |
1676 | } | |
1677 | module_init(x25_init); | |
1678 | ||
1679 | static void __exit x25_exit(void) | |
1680 | { | |
1681 | x25_proc_exit(); | |
1682 | x25_link_free(); | |
1683 | x25_route_free(); | |
1684 | ||
1685 | #ifdef CONFIG_SYSCTL | |
1686 | x25_unregister_sysctl(); | |
1687 | #endif | |
1688 | ||
1689 | unregister_netdevice_notifier(&x25_dev_notifier); | |
1690 | ||
1691 | dev_remove_pack(&x25_packet_type); | |
1692 | ||
1693 | sock_unregister(AF_X25); | |
1694 | proto_unregister(&x25_proto); | |
1695 | } | |
1696 | module_exit(x25_exit); | |
1697 | ||
1698 | MODULE_AUTHOR("Jonathan Naylor <g4klx@g4klx.demon.co.uk>"); | |
1699 | MODULE_DESCRIPTION("The X.25 Packet Layer network layer protocol"); | |
1700 | MODULE_LICENSE("GPL"); | |
1701 | MODULE_ALIAS_NETPROTO(PF_X25); |