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Commit | Line | Data |
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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> | |
5a0e3ad6 | 50 | #include <linux/slab.h> |
1da177e4 | 51 | #include <net/sock.h> |
c752f073 | 52 | #include <net/tcp_states.h> |
1da177e4 LT |
53 | #include <asm/uaccess.h> |
54 | #include <linux/fcntl.h> | |
55 | #include <linux/termios.h> /* For TIOCINQ/OUTQ */ | |
56 | #include <linux/notifier.h> | |
57 | #include <linux/init.h> | |
1b06e6ba | 58 | #include <linux/compat.h> |
a9288525 | 59 | #include <linux/ctype.h> |
1b06e6ba | 60 | |
1da177e4 | 61 | #include <net/x25.h> |
1b06e6ba | 62 | #include <net/compat.h> |
1da177e4 LT |
63 | |
64 | int sysctl_x25_restart_request_timeout = X25_DEFAULT_T20; | |
65 | int sysctl_x25_call_request_timeout = X25_DEFAULT_T21; | |
66 | int sysctl_x25_reset_request_timeout = X25_DEFAULT_T22; | |
67 | int sysctl_x25_clear_request_timeout = X25_DEFAULT_T23; | |
68 | int sysctl_x25_ack_holdback_timeout = X25_DEFAULT_T2; | |
39e21c0d | 69 | int sysctl_x25_forward = 0; |
1da177e4 LT |
70 | |
71 | HLIST_HEAD(x25_list); | |
72 | DEFINE_RWLOCK(x25_list_lock); | |
73 | ||
90ddc4f0 | 74 | static const struct proto_ops x25_proto_ops; |
1da177e4 LT |
75 | |
76 | static struct x25_address null_x25_address = {" "}; | |
77 | ||
1b06e6ba SP |
78 | #ifdef CONFIG_COMPAT |
79 | struct compat_x25_subscrip_struct { | |
80 | char device[200-sizeof(compat_ulong_t)]; | |
81 | compat_ulong_t global_facil_mask; | |
82 | compat_uint_t extended; | |
83 | }; | |
84 | #endif | |
85 | ||
f5eb917b JH |
86 | |
87 | int x25_parse_address_block(struct sk_buff *skb, | |
88 | struct x25_address *called_addr, | |
89 | struct x25_address *calling_addr) | |
90 | { | |
91 | unsigned char len; | |
92 | int needed; | |
93 | int rc; | |
94 | ||
95 | if (skb->len < 1) { | |
96 | /* packet has no address block */ | |
97 | rc = 0; | |
98 | goto empty; | |
99 | } | |
100 | ||
101 | len = *skb->data; | |
102 | needed = 1 + (len >> 4) + (len & 0x0f); | |
103 | ||
104 | if (skb->len < needed) { | |
105 | /* packet is too short to hold the addresses it claims | |
106 | to hold */ | |
107 | rc = -1; | |
108 | goto empty; | |
109 | } | |
110 | ||
111 | return x25_addr_ntoa(skb->data, called_addr, calling_addr); | |
112 | ||
113 | empty: | |
114 | *called_addr->x25_addr = 0; | |
115 | *calling_addr->x25_addr = 0; | |
116 | ||
117 | return rc; | |
118 | } | |
119 | ||
120 | ||
1da177e4 LT |
121 | int x25_addr_ntoa(unsigned char *p, struct x25_address *called_addr, |
122 | struct x25_address *calling_addr) | |
123 | { | |
6bf1574e | 124 | unsigned int called_len, calling_len; |
1da177e4 | 125 | char *called, *calling; |
6bf1574e | 126 | unsigned int i; |
1da177e4 LT |
127 | |
128 | called_len = (*p >> 0) & 0x0F; | |
129 | calling_len = (*p >> 4) & 0x0F; | |
130 | ||
131 | called = called_addr->x25_addr; | |
132 | calling = calling_addr->x25_addr; | |
133 | p++; | |
134 | ||
135 | for (i = 0; i < (called_len + calling_len); i++) { | |
136 | if (i < called_len) { | |
137 | if (i % 2 != 0) { | |
138 | *called++ = ((*p >> 0) & 0x0F) + '0'; | |
139 | p++; | |
140 | } else { | |
141 | *called++ = ((*p >> 4) & 0x0F) + '0'; | |
142 | } | |
143 | } else { | |
144 | if (i % 2 != 0) { | |
145 | *calling++ = ((*p >> 0) & 0x0F) + '0'; | |
146 | p++; | |
147 | } else { | |
148 | *calling++ = ((*p >> 4) & 0x0F) + '0'; | |
149 | } | |
150 | } | |
151 | } | |
152 | ||
153 | *called = *calling = '\0'; | |
154 | ||
155 | return 1 + (called_len + calling_len + 1) / 2; | |
156 | } | |
157 | ||
158 | int x25_addr_aton(unsigned char *p, struct x25_address *called_addr, | |
159 | struct x25_address *calling_addr) | |
160 | { | |
161 | unsigned int called_len, calling_len; | |
162 | char *called, *calling; | |
163 | int i; | |
164 | ||
165 | called = called_addr->x25_addr; | |
166 | calling = calling_addr->x25_addr; | |
167 | ||
168 | called_len = strlen(called); | |
169 | calling_len = strlen(calling); | |
170 | ||
171 | *p++ = (calling_len << 4) | (called_len << 0); | |
172 | ||
173 | for (i = 0; i < (called_len + calling_len); i++) { | |
174 | if (i < called_len) { | |
175 | if (i % 2 != 0) { | |
176 | *p |= (*called++ - '0') << 0; | |
177 | p++; | |
178 | } else { | |
179 | *p = 0x00; | |
180 | *p |= (*called++ - '0') << 4; | |
181 | } | |
182 | } else { | |
183 | if (i % 2 != 0) { | |
184 | *p |= (*calling++ - '0') << 0; | |
185 | p++; | |
186 | } else { | |
187 | *p = 0x00; | |
188 | *p |= (*calling++ - '0') << 4; | |
189 | } | |
190 | } | |
191 | } | |
192 | ||
193 | return 1 + (called_len + calling_len + 1) / 2; | |
194 | } | |
195 | ||
196 | /* | |
197 | * Socket removal during an interrupt is now safe. | |
198 | */ | |
199 | static void x25_remove_socket(struct sock *sk) | |
200 | { | |
201 | write_lock_bh(&x25_list_lock); | |
202 | sk_del_node_init(sk); | |
203 | write_unlock_bh(&x25_list_lock); | |
204 | } | |
205 | ||
206 | /* | |
207 | * Kill all bound sockets on a dropped device. | |
208 | */ | |
209 | static void x25_kill_by_device(struct net_device *dev) | |
210 | { | |
211 | struct sock *s; | |
212 | struct hlist_node *node; | |
213 | ||
214 | write_lock_bh(&x25_list_lock); | |
215 | ||
216 | sk_for_each(s, node, &x25_list) | |
217 | if (x25_sk(s)->neighbour && x25_sk(s)->neighbour->dev == dev) | |
218 | x25_disconnect(s, ENETUNREACH, 0, 0); | |
219 | ||
220 | write_unlock_bh(&x25_list_lock); | |
221 | } | |
222 | ||
223 | /* | |
224 | * Handle device status changes. | |
225 | */ | |
226 | static int x25_device_event(struct notifier_block *this, unsigned long event, | |
227 | void *ptr) | |
228 | { | |
229 | struct net_device *dev = ptr; | |
230 | struct x25_neigh *nb; | |
231 | ||
721499e8 | 232 | if (!net_eq(dev_net(dev), &init_net)) |
e9dc8653 EB |
233 | return NOTIFY_DONE; |
234 | ||
1da177e4 LT |
235 | if (dev->type == ARPHRD_X25 |
236 | #if defined(CONFIG_LLC) || defined(CONFIG_LLC_MODULE) | |
237 | || dev->type == ARPHRD_ETHER | |
238 | #endif | |
239 | ) { | |
240 | switch (event) { | |
241 | case NETDEV_UP: | |
242 | x25_link_device_up(dev); | |
243 | break; | |
244 | case NETDEV_GOING_DOWN: | |
245 | nb = x25_get_neigh(dev); | |
246 | if (nb) { | |
247 | x25_terminate_link(nb); | |
248 | x25_neigh_put(nb); | |
249 | } | |
250 | break; | |
251 | case NETDEV_DOWN: | |
252 | x25_kill_by_device(dev); | |
253 | x25_route_device_down(dev); | |
254 | x25_link_device_down(dev); | |
255 | break; | |
256 | } | |
257 | } | |
258 | ||
259 | return NOTIFY_DONE; | |
260 | } | |
261 | ||
262 | /* | |
263 | * Add a socket to the bound sockets list. | |
264 | */ | |
265 | static void x25_insert_socket(struct sock *sk) | |
266 | { | |
267 | write_lock_bh(&x25_list_lock); | |
268 | sk_add_node(sk, &x25_list); | |
269 | write_unlock_bh(&x25_list_lock); | |
270 | } | |
271 | ||
272 | /* | |
273 | * Find a socket that wants to accept the Call Request we just | |
274 | * received. Check the full list for an address/cud match. | |
275 | * If no cuds match return the next_best thing, an address match. | |
276 | * Note: if a listening socket has cud set it must only get calls | |
277 | * with matching cud. | |
278 | */ | |
cb65d506 SP |
279 | static struct sock *x25_find_listener(struct x25_address *addr, |
280 | struct sk_buff *skb) | |
1da177e4 LT |
281 | { |
282 | struct sock *s; | |
283 | struct sock *next_best; | |
284 | struct hlist_node *node; | |
285 | ||
286 | read_lock_bh(&x25_list_lock); | |
287 | next_best = NULL; | |
288 | ||
289 | sk_for_each(s, node, &x25_list) | |
290 | if ((!strcmp(addr->x25_addr, | |
cb65d506 SP |
291 | x25_sk(s)->source_addr.x25_addr) || |
292 | !strcmp(addr->x25_addr, | |
293 | null_x25_address.x25_addr)) && | |
294 | s->sk_state == TCP_LISTEN) { | |
1da177e4 LT |
295 | /* |
296 | * Found a listening socket, now check the incoming | |
297 | * call user data vs this sockets call user data | |
298 | */ | |
cb65d506 | 299 | if(skb->len > 0 && x25_sk(s)->cudmatchlength > 0) { |
f8e1d201 YH |
300 | if((memcmp(x25_sk(s)->calluserdata.cuddata, |
301 | skb->data, | |
cb65d506 SP |
302 | x25_sk(s)->cudmatchlength)) == 0) { |
303 | sock_hold(s); | |
304 | goto found; | |
305 | } | |
306 | } else | |
1da177e4 | 307 | next_best = s; |
1da177e4 LT |
308 | } |
309 | if (next_best) { | |
310 | s = next_best; | |
311 | sock_hold(s); | |
312 | goto found; | |
313 | } | |
314 | s = NULL; | |
315 | found: | |
316 | read_unlock_bh(&x25_list_lock); | |
317 | return s; | |
318 | } | |
319 | ||
320 | /* | |
321 | * Find a connected X.25 socket given my LCI and neighbour. | |
322 | */ | |
323 | static struct sock *__x25_find_socket(unsigned int lci, struct x25_neigh *nb) | |
324 | { | |
325 | struct sock *s; | |
326 | struct hlist_node *node; | |
327 | ||
328 | sk_for_each(s, node, &x25_list) | |
329 | if (x25_sk(s)->lci == lci && x25_sk(s)->neighbour == nb) { | |
330 | sock_hold(s); | |
331 | goto found; | |
332 | } | |
333 | s = NULL; | |
334 | found: | |
335 | return s; | |
336 | } | |
337 | ||
338 | struct sock *x25_find_socket(unsigned int lci, struct x25_neigh *nb) | |
339 | { | |
340 | struct sock *s; | |
341 | ||
342 | read_lock_bh(&x25_list_lock); | |
343 | s = __x25_find_socket(lci, nb); | |
344 | read_unlock_bh(&x25_list_lock); | |
345 | return s; | |
346 | } | |
347 | ||
348 | /* | |
349 | * Find a unique LCI for a given device. | |
350 | */ | |
351 | static unsigned int x25_new_lci(struct x25_neigh *nb) | |
352 | { | |
353 | unsigned int lci = 1; | |
354 | struct sock *sk; | |
355 | ||
356 | read_lock_bh(&x25_list_lock); | |
357 | ||
358 | while ((sk = __x25_find_socket(lci, nb)) != NULL) { | |
359 | sock_put(sk); | |
360 | if (++lci == 4096) { | |
361 | lci = 0; | |
362 | break; | |
363 | } | |
364 | } | |
365 | ||
366 | read_unlock_bh(&x25_list_lock); | |
367 | return lci; | |
368 | } | |
369 | ||
370 | /* | |
371 | * Deferred destroy. | |
372 | */ | |
14ebaf81 | 373 | static void __x25_destroy_socket(struct sock *); |
1da177e4 LT |
374 | |
375 | /* | |
376 | * handler for deferred kills. | |
377 | */ | |
378 | static void x25_destroy_timer(unsigned long data) | |
379 | { | |
14ebaf81 | 380 | x25_destroy_socket_from_timer((struct sock *)data); |
1da177e4 LT |
381 | } |
382 | ||
383 | /* | |
384 | * This is called from user mode and the timers. Thus it protects itself | |
385 | * against interrupt users but doesn't worry about being called during | |
386 | * work. Once it is removed from the queue no interrupt or bottom half | |
387 | * will touch it and we are (fairly 8-) ) safe. | |
388 | * Not static as it's used by the timer | |
389 | */ | |
14ebaf81 | 390 | static void __x25_destroy_socket(struct sock *sk) |
1da177e4 LT |
391 | { |
392 | struct sk_buff *skb; | |
393 | ||
1da177e4 LT |
394 | x25_stop_heartbeat(sk); |
395 | x25_stop_timer(sk); | |
396 | ||
397 | x25_remove_socket(sk); | |
398 | x25_clear_queues(sk); /* Flush the queues */ | |
399 | ||
400 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
401 | if (skb->sk != sk) { /* A pending connection */ | |
402 | /* | |
403 | * Queue the unaccepted socket for death | |
404 | */ | |
2cec6b01 | 405 | skb->sk->sk_state = TCP_LISTEN; |
1da177e4 LT |
406 | sock_set_flag(skb->sk, SOCK_DEAD); |
407 | x25_start_heartbeat(skb->sk); | |
408 | x25_sk(skb->sk)->state = X25_STATE_0; | |
409 | } | |
410 | ||
411 | kfree_skb(skb); | |
412 | } | |
413 | ||
c564039f | 414 | if (sk_has_allocations(sk)) { |
1da177e4 LT |
415 | /* Defer: outstanding buffers */ |
416 | sk->sk_timer.expires = jiffies + 10 * HZ; | |
417 | sk->sk_timer.function = x25_destroy_timer; | |
418 | sk->sk_timer.data = (unsigned long)sk; | |
419 | add_timer(&sk->sk_timer); | |
420 | } else { | |
421 | /* drop last reference so sock_put will free */ | |
422 | __sock_put(sk); | |
423 | } | |
14ebaf81 | 424 | } |
1da177e4 | 425 | |
14ebaf81 DM |
426 | void x25_destroy_socket_from_timer(struct sock *sk) |
427 | { | |
428 | sock_hold(sk); | |
429 | bh_lock_sock(sk); | |
430 | __x25_destroy_socket(sk); | |
431 | bh_unlock_sock(sk); | |
432 | sock_put(sk); | |
433 | } | |
434 | ||
435 | static void x25_destroy_socket(struct sock *sk) | |
436 | { | |
437 | sock_hold(sk); | |
438 | lock_sock(sk); | |
439 | __x25_destroy_socket(sk); | |
1da177e4 LT |
440 | release_sock(sk); |
441 | sock_put(sk); | |
442 | } | |
443 | ||
444 | /* | |
445 | * Handling for system calls applied via the various interfaces to a | |
446 | * X.25 socket object. | |
447 | */ | |
448 | ||
449 | static int x25_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 450 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
451 | { |
452 | int opt; | |
453 | struct sock *sk = sock->sk; | |
454 | int rc = -ENOPROTOOPT; | |
455 | ||
456 | if (level != SOL_X25 || optname != X25_QBITINCL) | |
457 | goto out; | |
458 | ||
459 | rc = -EINVAL; | |
460 | if (optlen < sizeof(int)) | |
461 | goto out; | |
462 | ||
463 | rc = -EFAULT; | |
464 | if (get_user(opt, (int __user *)optval)) | |
465 | goto out; | |
466 | ||
cb863ffd | 467 | if (opt) |
468 | set_bit(X25_Q_BIT_FLAG, &x25_sk(sk)->flags); | |
469 | else | |
470 | clear_bit(X25_Q_BIT_FLAG, &x25_sk(sk)->flags); | |
1da177e4 LT |
471 | rc = 0; |
472 | out: | |
473 | return rc; | |
474 | } | |
475 | ||
476 | static int x25_getsockopt(struct socket *sock, int level, int optname, | |
477 | char __user *optval, int __user *optlen) | |
478 | { | |
479 | struct sock *sk = sock->sk; | |
480 | int val, len, rc = -ENOPROTOOPT; | |
f8e1d201 | 481 | |
1da177e4 LT |
482 | if (level != SOL_X25 || optname != X25_QBITINCL) |
483 | goto out; | |
484 | ||
485 | rc = -EFAULT; | |
486 | if (get_user(len, optlen)) | |
487 | goto out; | |
488 | ||
489 | len = min_t(unsigned int, len, sizeof(int)); | |
490 | ||
491 | rc = -EINVAL; | |
492 | if (len < 0) | |
493 | goto out; | |
f8e1d201 | 494 | |
1da177e4 LT |
495 | rc = -EFAULT; |
496 | if (put_user(len, optlen)) | |
497 | goto out; | |
498 | ||
cb863ffd | 499 | val = test_bit(X25_Q_BIT_FLAG, &x25_sk(sk)->flags); |
1da177e4 LT |
500 | rc = copy_to_user(optval, &val, len) ? -EFAULT : 0; |
501 | out: | |
502 | return rc; | |
503 | } | |
504 | ||
505 | static int x25_listen(struct socket *sock, int backlog) | |
506 | { | |
507 | struct sock *sk = sock->sk; | |
508 | int rc = -EOPNOTSUPP; | |
509 | ||
25aa4efe | 510 | lock_sock(sk); |
1da177e4 LT |
511 | if (sk->sk_state != TCP_LISTEN) { |
512 | memset(&x25_sk(sk)->dest_addr, 0, X25_ADDR_LEN); | |
513 | sk->sk_max_ack_backlog = backlog; | |
514 | sk->sk_state = TCP_LISTEN; | |
515 | rc = 0; | |
516 | } | |
25aa4efe | 517 | release_sock(sk); |
1da177e4 LT |
518 | |
519 | return rc; | |
520 | } | |
521 | ||
522 | static struct proto x25_proto = { | |
523 | .name = "X25", | |
524 | .owner = THIS_MODULE, | |
525 | .obj_size = sizeof(struct x25_sock), | |
526 | }; | |
527 | ||
1b8d7ae4 | 528 | static struct sock *x25_alloc_socket(struct net *net) |
1da177e4 LT |
529 | { |
530 | struct x25_sock *x25; | |
6257ff21 | 531 | struct sock *sk = sk_alloc(net, AF_X25, GFP_ATOMIC, &x25_proto); |
1da177e4 LT |
532 | |
533 | if (!sk) | |
534 | goto out; | |
535 | ||
536 | sock_init_data(NULL, sk); | |
537 | ||
538 | x25 = x25_sk(sk); | |
539 | skb_queue_head_init(&x25->ack_queue); | |
540 | skb_queue_head_init(&x25->fragment_queue); | |
541 | skb_queue_head_init(&x25->interrupt_in_queue); | |
542 | skb_queue_head_init(&x25->interrupt_out_queue); | |
543 | out: | |
544 | return sk; | |
545 | } | |
546 | ||
3f378b68 EP |
547 | static int x25_create(struct net *net, struct socket *sock, int protocol, |
548 | int kern) | |
1da177e4 LT |
549 | { |
550 | struct sock *sk; | |
551 | struct x25_sock *x25; | |
b18e7a06 | 552 | int rc = -EAFNOSUPPORT; |
1da177e4 | 553 | |
09ad9bc7 | 554 | if (!net_eq(net, &init_net)) |
b18e7a06 | 555 | goto out; |
556 | ||
557 | rc = -ESOCKTNOSUPPORT; | |
558 | if (sock->type != SOCK_SEQPACKET) | |
559 | goto out; | |
1b8d7ae4 | 560 | |
b18e7a06 | 561 | rc = -EINVAL; |
562 | if (protocol) | |
1da177e4 LT |
563 | goto out; |
564 | ||
b18e7a06 | 565 | rc = -ENOBUFS; |
1b8d7ae4 | 566 | if ((sk = x25_alloc_socket(net)) == NULL) |
1da177e4 LT |
567 | goto out; |
568 | ||
569 | x25 = x25_sk(sk); | |
570 | ||
571 | sock_init_data(sock, sk); | |
572 | ||
573 | x25_init_timers(sk); | |
574 | ||
575 | sock->ops = &x25_proto_ops; | |
576 | sk->sk_protocol = protocol; | |
577 | sk->sk_backlog_rcv = x25_backlog_rcv; | |
578 | ||
579 | x25->t21 = sysctl_x25_call_request_timeout; | |
580 | x25->t22 = sysctl_x25_reset_request_timeout; | |
581 | x25->t23 = sysctl_x25_clear_request_timeout; | |
582 | x25->t2 = sysctl_x25_ack_holdback_timeout; | |
583 | x25->state = X25_STATE_0; | |
cb65d506 | 584 | x25->cudmatchlength = 0; |
37cda787 | 585 | set_bit(X25_ACCPT_APPRV_FLAG, &x25->flags); /* normally no cud */ |
ebc3f64b | 586 | /* on call accept */ |
1da177e4 LT |
587 | |
588 | x25->facilities.winsize_in = X25_DEFAULT_WINDOW_SIZE; | |
589 | x25->facilities.winsize_out = X25_DEFAULT_WINDOW_SIZE; | |
590 | x25->facilities.pacsize_in = X25_DEFAULT_PACKET_SIZE; | |
591 | x25->facilities.pacsize_out = X25_DEFAULT_PACKET_SIZE; | |
ddd0451f JH |
592 | x25->facilities.throughput = 0; /* by default don't negotiate |
593 | throughput */ | |
1da177e4 | 594 | x25->facilities.reverse = X25_DEFAULT_REVERSE; |
f8e1d201 YH |
595 | x25->dte_facilities.calling_len = 0; |
596 | x25->dte_facilities.called_len = 0; | |
597 | memset(x25->dte_facilities.called_ae, '\0', | |
598 | sizeof(x25->dte_facilities.called_ae)); | |
599 | memset(x25->dte_facilities.calling_ae, '\0', | |
600 | sizeof(x25->dte_facilities.calling_ae)); | |
a64b7b93 | 601 | |
1da177e4 LT |
602 | rc = 0; |
603 | out: | |
604 | return rc; | |
605 | } | |
606 | ||
607 | static struct sock *x25_make_new(struct sock *osk) | |
608 | { | |
609 | struct sock *sk = NULL; | |
610 | struct x25_sock *x25, *ox25; | |
611 | ||
612 | if (osk->sk_type != SOCK_SEQPACKET) | |
613 | goto out; | |
614 | ||
3b1e0a65 | 615 | if ((sk = x25_alloc_socket(sock_net(osk))) == NULL) |
1da177e4 LT |
616 | goto out; |
617 | ||
618 | x25 = x25_sk(sk); | |
619 | ||
620 | sk->sk_type = osk->sk_type; | |
1da177e4 LT |
621 | sk->sk_priority = osk->sk_priority; |
622 | sk->sk_protocol = osk->sk_protocol; | |
623 | sk->sk_rcvbuf = osk->sk_rcvbuf; | |
624 | sk->sk_sndbuf = osk->sk_sndbuf; | |
625 | sk->sk_state = TCP_ESTABLISHED; | |
1da177e4 | 626 | sk->sk_backlog_rcv = osk->sk_backlog_rcv; |
a20a8554 | 627 | sock_copy_flags(sk, osk); |
1da177e4 LT |
628 | |
629 | ox25 = x25_sk(osk); | |
630 | x25->t21 = ox25->t21; | |
631 | x25->t22 = ox25->t22; | |
632 | x25->t23 = ox25->t23; | |
633 | x25->t2 = ox25->t2; | |
cb863ffd | 634 | x25->flags = ox25->flags; |
1da177e4 | 635 | x25->facilities = ox25->facilities; |
a64b7b93 | 636 | x25->dte_facilities = ox25->dte_facilities; |
cb65d506 | 637 | x25->cudmatchlength = ox25->cudmatchlength; |
1da177e4 | 638 | |
b7792e34 | 639 | clear_bit(X25_INTERRUPT_FLAG, &x25->flags); |
1da177e4 LT |
640 | x25_init_timers(sk); |
641 | out: | |
642 | return sk; | |
643 | } | |
644 | ||
645 | static int x25_release(struct socket *sock) | |
646 | { | |
647 | struct sock *sk = sock->sk; | |
648 | struct x25_sock *x25; | |
649 | ||
91774904 | 650 | lock_kernel(); |
1da177e4 LT |
651 | if (!sk) |
652 | goto out; | |
653 | ||
654 | x25 = x25_sk(sk); | |
655 | ||
656 | switch (x25->state) { | |
657 | ||
658 | case X25_STATE_0: | |
659 | case X25_STATE_2: | |
660 | x25_disconnect(sk, 0, 0, 0); | |
661 | x25_destroy_socket(sk); | |
662 | goto out; | |
663 | ||
664 | case X25_STATE_1: | |
665 | case X25_STATE_3: | |
666 | case X25_STATE_4: | |
667 | x25_clear_queues(sk); | |
668 | x25_write_internal(sk, X25_CLEAR_REQUEST); | |
669 | x25_start_t23timer(sk); | |
670 | x25->state = X25_STATE_2; | |
671 | sk->sk_state = TCP_CLOSE; | |
672 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
673 | sk->sk_state_change(sk); | |
674 | sock_set_flag(sk, SOCK_DEAD); | |
675 | sock_set_flag(sk, SOCK_DESTROY); | |
676 | break; | |
677 | } | |
678 | ||
c751e4f8 | 679 | sock_orphan(sk); |
1da177e4 | 680 | out: |
91774904 | 681 | unlock_kernel(); |
1da177e4 LT |
682 | return 0; |
683 | } | |
684 | ||
685 | static int x25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
686 | { | |
687 | struct sock *sk = sock->sk; | |
688 | struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr; | |
a9288525 | 689 | int len, i, rc = 0; |
1da177e4 LT |
690 | |
691 | if (!sock_flag(sk, SOCK_ZAPPED) || | |
692 | addr_len != sizeof(struct sockaddr_x25) || | |
91774904 AB |
693 | addr->sx25_family != AF_X25) { |
694 | rc = -EINVAL; | |
695 | goto out; | |
696 | } | |
1da177e4 | 697 | |
a9288525 | 698 | len = strlen(addr->sx25_addr.x25_addr); |
699 | for (i = 0; i < len; i++) { | |
700 | if (!isdigit(addr->sx25_addr.x25_addr[i])) { | |
701 | rc = -EINVAL; | |
702 | goto out; | |
703 | } | |
704 | } | |
705 | ||
90c27297 | 706 | lock_sock(sk); |
1da177e4 LT |
707 | x25_sk(sk)->source_addr = addr->sx25_addr; |
708 | x25_insert_socket(sk); | |
709 | sock_reset_flag(sk, SOCK_ZAPPED); | |
90c27297 | 710 | release_sock(sk); |
1da177e4 | 711 | SOCK_DEBUG(sk, "x25_bind: socket is bound\n"); |
91774904 | 712 | out: |
91774904 | 713 | return rc; |
1da177e4 LT |
714 | } |
715 | ||
716 | static int x25_wait_for_connection_establishment(struct sock *sk) | |
717 | { | |
718 | DECLARE_WAITQUEUE(wait, current); | |
f8e1d201 | 719 | int rc; |
1da177e4 | 720 | |
aa395145 | 721 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
1da177e4 LT |
722 | for (;;) { |
723 | __set_current_state(TASK_INTERRUPTIBLE); | |
724 | rc = -ERESTARTSYS; | |
725 | if (signal_pending(current)) | |
726 | break; | |
727 | rc = sock_error(sk); | |
728 | if (rc) { | |
729 | sk->sk_socket->state = SS_UNCONNECTED; | |
730 | break; | |
731 | } | |
732 | rc = 0; | |
733 | if (sk->sk_state != TCP_ESTABLISHED) { | |
734 | release_sock(sk); | |
735 | schedule(); | |
736 | lock_sock(sk); | |
737 | } else | |
738 | break; | |
739 | } | |
740 | __set_current_state(TASK_RUNNING); | |
aa395145 | 741 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
742 | return rc; |
743 | } | |
744 | ||
745 | static int x25_connect(struct socket *sock, struct sockaddr *uaddr, | |
746 | int addr_len, int flags) | |
747 | { | |
748 | struct sock *sk = sock->sk; | |
749 | struct x25_sock *x25 = x25_sk(sk); | |
750 | struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr; | |
751 | struct x25_route *rt; | |
752 | int rc = 0; | |
753 | ||
754 | lock_sock(sk); | |
755 | if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { | |
756 | sock->state = SS_CONNECTED; | |
757 | goto out; /* Connect completed during a ERESTARTSYS event */ | |
758 | } | |
759 | ||
760 | rc = -ECONNREFUSED; | |
761 | if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { | |
762 | sock->state = SS_UNCONNECTED; | |
763 | goto out; | |
764 | } | |
765 | ||
766 | rc = -EISCONN; /* No reconnect on a seqpacket socket */ | |
767 | if (sk->sk_state == TCP_ESTABLISHED) | |
768 | goto out; | |
769 | ||
f8e1d201 | 770 | sk->sk_state = TCP_CLOSE; |
1da177e4 LT |
771 | sock->state = SS_UNCONNECTED; |
772 | ||
773 | rc = -EINVAL; | |
774 | if (addr_len != sizeof(struct sockaddr_x25) || | |
775 | addr->sx25_family != AF_X25) | |
776 | goto out; | |
777 | ||
778 | rc = -ENETUNREACH; | |
779 | rt = x25_get_route(&addr->sx25_addr); | |
780 | if (!rt) | |
781 | goto out; | |
782 | ||
783 | x25->neighbour = x25_get_neigh(rt->dev); | |
784 | if (!x25->neighbour) | |
785 | goto out_put_route; | |
786 | ||
787 | x25_limit_facilities(&x25->facilities, x25->neighbour); | |
788 | ||
789 | x25->lci = x25_new_lci(x25->neighbour); | |
790 | if (!x25->lci) | |
791 | goto out_put_neigh; | |
792 | ||
793 | rc = -EINVAL; | |
794 | if (sock_flag(sk, SOCK_ZAPPED)) /* Must bind first - autobinding does not work */ | |
795 | goto out_put_neigh; | |
796 | ||
797 | if (!strcmp(x25->source_addr.x25_addr, null_x25_address.x25_addr)) | |
798 | memset(&x25->source_addr, '\0', X25_ADDR_LEN); | |
799 | ||
800 | x25->dest_addr = addr->sx25_addr; | |
801 | ||
802 | /* Move to connecting socket, start sending Connect Requests */ | |
803 | sock->state = SS_CONNECTING; | |
804 | sk->sk_state = TCP_SYN_SENT; | |
805 | ||
806 | x25->state = X25_STATE_1; | |
807 | ||
808 | x25_write_internal(sk, X25_CALL_REQUEST); | |
809 | ||
810 | x25_start_heartbeat(sk); | |
811 | x25_start_t21timer(sk); | |
812 | ||
813 | /* Now the loop */ | |
814 | rc = -EINPROGRESS; | |
815 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) | |
816 | goto out_put_neigh; | |
817 | ||
818 | rc = x25_wait_for_connection_establishment(sk); | |
819 | if (rc) | |
820 | goto out_put_neigh; | |
821 | ||
822 | sock->state = SS_CONNECTED; | |
823 | rc = 0; | |
824 | out_put_neigh: | |
825 | if (rc) | |
826 | x25_neigh_put(x25->neighbour); | |
827 | out_put_route: | |
828 | x25_route_put(rt); | |
829 | out: | |
830 | release_sock(sk); | |
831 | return rc; | |
832 | } | |
833 | ||
bac37ec8 | 834 | static int x25_wait_for_data(struct sock *sk, long timeout) |
1da177e4 LT |
835 | { |
836 | DECLARE_WAITQUEUE(wait, current); | |
837 | int rc = 0; | |
838 | ||
aa395145 | 839 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
1da177e4 LT |
840 | for (;;) { |
841 | __set_current_state(TASK_INTERRUPTIBLE); | |
842 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
843 | break; | |
844 | rc = -ERESTARTSYS; | |
845 | if (signal_pending(current)) | |
846 | break; | |
847 | rc = -EAGAIN; | |
848 | if (!timeout) | |
849 | break; | |
850 | rc = 0; | |
851 | if (skb_queue_empty(&sk->sk_receive_queue)) { | |
852 | release_sock(sk); | |
853 | timeout = schedule_timeout(timeout); | |
854 | lock_sock(sk); | |
855 | } else | |
856 | break; | |
857 | } | |
858 | __set_current_state(TASK_RUNNING); | |
aa395145 | 859 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
860 | return rc; |
861 | } | |
f8e1d201 | 862 | |
1da177e4 LT |
863 | static int x25_accept(struct socket *sock, struct socket *newsock, int flags) |
864 | { | |
865 | struct sock *sk = sock->sk; | |
866 | struct sock *newsk; | |
867 | struct sk_buff *skb; | |
868 | int rc = -EINVAL; | |
869 | ||
141646ce | 870 | if (!sk) |
1da177e4 LT |
871 | goto out; |
872 | ||
873 | rc = -EOPNOTSUPP; | |
874 | if (sk->sk_type != SOCK_SEQPACKET) | |
875 | goto out; | |
876 | ||
877 | lock_sock(sk); | |
141646ce AH |
878 | rc = -EINVAL; |
879 | if (sk->sk_state != TCP_LISTEN) | |
880 | goto out2; | |
881 | ||
1da177e4 LT |
882 | rc = x25_wait_for_data(sk, sk->sk_rcvtimeo); |
883 | if (rc) | |
884 | goto out2; | |
885 | skb = skb_dequeue(&sk->sk_receive_queue); | |
886 | rc = -EINVAL; | |
887 | if (!skb->sk) | |
888 | goto out2; | |
889 | newsk = skb->sk; | |
b61d38e0 | 890 | sock_graft(newsk, newsock); |
1da177e4 LT |
891 | |
892 | /* Now attach up the new socket */ | |
893 | skb->sk = NULL; | |
894 | kfree_skb(skb); | |
895 | sk->sk_ack_backlog--; | |
1da177e4 LT |
896 | newsock->state = SS_CONNECTED; |
897 | rc = 0; | |
898 | out2: | |
899 | release_sock(sk); | |
900 | out: | |
901 | return rc; | |
902 | } | |
903 | ||
904 | static int x25_getname(struct socket *sock, struct sockaddr *uaddr, | |
905 | int *uaddr_len, int peer) | |
906 | { | |
907 | struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)uaddr; | |
908 | struct sock *sk = sock->sk; | |
909 | struct x25_sock *x25 = x25_sk(sk); | |
91774904 | 910 | int rc = 0; |
1da177e4 LT |
911 | |
912 | if (peer) { | |
91774904 AB |
913 | if (sk->sk_state != TCP_ESTABLISHED) { |
914 | rc = -ENOTCONN; | |
915 | goto out; | |
916 | } | |
1da177e4 LT |
917 | sx25->sx25_addr = x25->dest_addr; |
918 | } else | |
919 | sx25->sx25_addr = x25->source_addr; | |
920 | ||
921 | sx25->sx25_family = AF_X25; | |
922 | *uaddr_len = sizeof(*sx25); | |
923 | ||
91774904 | 924 | out: |
91774904 AB |
925 | return rc; |
926 | } | |
927 | ||
1da177e4 LT |
928 | int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *nb, |
929 | unsigned int lci) | |
930 | { | |
931 | struct sock *sk; | |
932 | struct sock *make; | |
933 | struct x25_sock *makex25; | |
934 | struct x25_address source_addr, dest_addr; | |
935 | struct x25_facilities facilities; | |
a64b7b93 | 936 | struct x25_dte_facilities dte_facilities; |
95a9dc43 | 937 | int len, addr_len, rc; |
1da177e4 LT |
938 | |
939 | /* | |
940 | * Remove the LCI and frame type. | |
941 | */ | |
942 | skb_pull(skb, X25_STD_MIN_LEN); | |
943 | ||
944 | /* | |
945 | * Extract the X.25 addresses and convert them to ASCII strings, | |
946 | * and remove them. | |
f5eb917b JH |
947 | * |
948 | * Address block is mandatory in call request packets | |
1da177e4 | 949 | */ |
f5eb917b JH |
950 | addr_len = x25_parse_address_block(skb, &source_addr, &dest_addr); |
951 | if (addr_len <= 0) | |
952 | goto out_clear_request; | |
95a9dc43 | 953 | skb_pull(skb, addr_len); |
1da177e4 LT |
954 | |
955 | /* | |
956 | * Get the length of the facilities, skip past them for the moment | |
957 | * get the call user data because this is needed to determine | |
958 | * the correct listener | |
f5eb917b JH |
959 | * |
960 | * Facilities length is mandatory in call request packets | |
1da177e4 | 961 | */ |
f5eb917b JH |
962 | if (skb->len < 1) |
963 | goto out_clear_request; | |
1da177e4 | 964 | len = skb->data[0] + 1; |
f5eb917b JH |
965 | if (skb->len < len) |
966 | goto out_clear_request; | |
1da177e4 LT |
967 | skb_pull(skb,len); |
968 | ||
1da177e4 LT |
969 | /* |
970 | * Find a listener for the particular address/cud pair. | |
971 | */ | |
cb65d506 SP |
972 | sk = x25_find_listener(&source_addr,skb); |
973 | skb_push(skb,len); | |
1da177e4 | 974 | |
95a9dc43 AH |
975 | if (sk != NULL && sk_acceptq_is_full(sk)) { |
976 | goto out_sock_put; | |
977 | } | |
978 | ||
1da177e4 | 979 | /* |
95a9dc43 AH |
980 | * We dont have any listeners for this incoming call. |
981 | * Try forwarding it. | |
1da177e4 | 982 | */ |
95a9dc43 AH |
983 | if (sk == NULL) { |
984 | skb_push(skb, addr_len + X25_STD_MIN_LEN); | |
39e21c0d AH |
985 | if (sysctl_x25_forward && |
986 | x25_forward_call(&dest_addr, nb, skb, lci) > 0) | |
95a9dc43 AH |
987 | { |
988 | /* Call was forwarded, dont process it any more */ | |
989 | kfree_skb(skb); | |
990 | rc = 1; | |
991 | goto out; | |
992 | } else { | |
993 | /* No listeners, can't forward, clear the call */ | |
994 | goto out_clear_request; | |
995 | } | |
996 | } | |
1da177e4 LT |
997 | |
998 | /* | |
999 | * Try to reach a compromise on the requested facilities. | |
1000 | */ | |
a64b7b93 SP |
1001 | len = x25_negotiate_facilities(skb, sk, &facilities, &dte_facilities); |
1002 | if (len == -1) | |
1da177e4 LT |
1003 | goto out_sock_put; |
1004 | ||
1005 | /* | |
1006 | * current neighbour/link might impose additional limits | |
1007 | * on certain facilties | |
1008 | */ | |
1009 | ||
1010 | x25_limit_facilities(&facilities, nb); | |
1011 | ||
1012 | /* | |
1013 | * Try to create a new socket. | |
1014 | */ | |
1015 | make = x25_make_new(sk); | |
1016 | if (!make) | |
1017 | goto out_sock_put; | |
1018 | ||
1019 | /* | |
1020 | * Remove the facilities | |
1021 | */ | |
1022 | skb_pull(skb, len); | |
1023 | ||
1024 | skb->sk = make; | |
1025 | make->sk_state = TCP_ESTABLISHED; | |
1026 | ||
1027 | makex25 = x25_sk(make); | |
1028 | makex25->lci = lci; | |
1029 | makex25->dest_addr = dest_addr; | |
1030 | makex25->source_addr = source_addr; | |
1031 | makex25->neighbour = nb; | |
1032 | makex25->facilities = facilities; | |
a64b7b93 | 1033 | makex25->dte_facilities= dte_facilities; |
1da177e4 | 1034 | makex25->vc_facil_mask = x25_sk(sk)->vc_facil_mask; |
cb65d506 SP |
1035 | /* ensure no reverse facil on accept */ |
1036 | makex25->vc_facil_mask &= ~X25_MASK_REVERSE; | |
a64b7b93 SP |
1037 | /* ensure no calling address extension on accept */ |
1038 | makex25->vc_facil_mask &= ~X25_MASK_CALLING_AE; | |
cb65d506 | 1039 | makex25->cudmatchlength = x25_sk(sk)->cudmatchlength; |
1da177e4 | 1040 | |
37cda787 | 1041 | /* Normally all calls are accepted immediately */ |
1042 | if (test_bit(X25_ACCPT_APPRV_FLAG, &makex25->flags)) { | |
ebc3f64b SP |
1043 | x25_write_internal(make, X25_CALL_ACCEPTED); |
1044 | makex25->state = X25_STATE_3; | |
1045 | } | |
1da177e4 | 1046 | |
cb65d506 SP |
1047 | /* |
1048 | * Incoming Call User Data. | |
1049 | */ | |
8db09f26 RK |
1050 | skb_copy_from_linear_data(skb, makex25->calluserdata.cuddata, skb->len); |
1051 | makex25->calluserdata.cudlength = skb->len; | |
cb65d506 | 1052 | |
1da177e4 LT |
1053 | sk->sk_ack_backlog++; |
1054 | ||
1055 | x25_insert_socket(make); | |
1056 | ||
1057 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1058 | ||
1059 | x25_start_heartbeat(make); | |
1060 | ||
1061 | if (!sock_flag(sk, SOCK_DEAD)) | |
1062 | sk->sk_data_ready(sk, skb->len); | |
1063 | rc = 1; | |
1064 | sock_put(sk); | |
1065 | out: | |
1066 | return rc; | |
1067 | out_sock_put: | |
1068 | sock_put(sk); | |
1069 | out_clear_request: | |
1070 | rc = 0; | |
1071 | x25_transmit_clear_request(nb, lci, 0x01); | |
1072 | goto out; | |
1073 | } | |
1074 | ||
1075 | static int x25_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1076 | struct msghdr *msg, size_t len) | |
1077 | { | |
1078 | struct sock *sk = sock->sk; | |
1079 | struct x25_sock *x25 = x25_sk(sk); | |
1080 | struct sockaddr_x25 *usx25 = (struct sockaddr_x25 *)msg->msg_name; | |
1081 | struct sockaddr_x25 sx25; | |
1082 | struct sk_buff *skb; | |
1083 | unsigned char *asmptr; | |
1084 | int noblock = msg->msg_flags & MSG_DONTWAIT; | |
1085 | size_t size; | |
1086 | int qbit = 0, rc = -EINVAL; | |
1087 | ||
91774904 | 1088 | lock_kernel(); |
1da177e4 LT |
1089 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_OOB|MSG_EOR|MSG_CMSG_COMPAT)) |
1090 | goto out; | |
1091 | ||
1092 | /* we currently don't support segmented records at the user interface */ | |
1093 | if (!(msg->msg_flags & (MSG_EOR|MSG_OOB))) | |
1094 | goto out; | |
1095 | ||
1096 | rc = -EADDRNOTAVAIL; | |
1097 | if (sock_flag(sk, SOCK_ZAPPED)) | |
1098 | goto out; | |
1099 | ||
1100 | rc = -EPIPE; | |
1101 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1102 | send_sig(SIGPIPE, current, 0); | |
1103 | goto out; | |
1104 | } | |
1105 | ||
1106 | rc = -ENETUNREACH; | |
1107 | if (!x25->neighbour) | |
1108 | goto out; | |
1109 | ||
1110 | if (usx25) { | |
1111 | rc = -EINVAL; | |
1112 | if (msg->msg_namelen < sizeof(sx25)) | |
1113 | goto out; | |
1114 | memcpy(&sx25, usx25, sizeof(sx25)); | |
1115 | rc = -EISCONN; | |
1116 | if (strcmp(x25->dest_addr.x25_addr, sx25.sx25_addr.x25_addr)) | |
1117 | goto out; | |
1118 | rc = -EINVAL; | |
1119 | if (sx25.sx25_family != AF_X25) | |
1120 | goto out; | |
1121 | } else { | |
1122 | /* | |
1123 | * FIXME 1003.1g - if the socket is like this because | |
1124 | * it has become closed (not started closed) we ought | |
1125 | * to SIGPIPE, EPIPE; | |
1126 | */ | |
1127 | rc = -ENOTCONN; | |
1128 | if (sk->sk_state != TCP_ESTABLISHED) | |
1129 | goto out; | |
1130 | ||
1131 | sx25.sx25_family = AF_X25; | |
1132 | sx25.sx25_addr = x25->dest_addr; | |
1133 | } | |
1134 | ||
83e0bbcb AC |
1135 | /* Sanity check the packet size */ |
1136 | if (len > 65535) { | |
1137 | rc = -EMSGSIZE; | |
1138 | goto out; | |
1139 | } | |
1140 | ||
1da177e4 LT |
1141 | SOCK_DEBUG(sk, "x25_sendmsg: sendto: Addresses built.\n"); |
1142 | ||
1143 | /* Build a packet */ | |
1144 | SOCK_DEBUG(sk, "x25_sendmsg: sendto: building packet.\n"); | |
1145 | ||
1146 | if ((msg->msg_flags & MSG_OOB) && len > 32) | |
1147 | len = 32; | |
1148 | ||
1149 | size = len + X25_MAX_L2_LEN + X25_EXT_MIN_LEN; | |
1150 | ||
1151 | skb = sock_alloc_send_skb(sk, size, noblock, &rc); | |
1152 | if (!skb) | |
1153 | goto out; | |
1154 | X25_SKB_CB(skb)->flags = msg->msg_flags; | |
1155 | ||
1156 | skb_reserve(skb, X25_MAX_L2_LEN + X25_EXT_MIN_LEN); | |
1157 | ||
1158 | /* | |
1159 | * Put the data on the end | |
1160 | */ | |
1161 | SOCK_DEBUG(sk, "x25_sendmsg: Copying user data\n"); | |
1162 | ||
eeeb0374 ACM |
1163 | skb_reset_transport_header(skb); |
1164 | skb_put(skb, len); | |
1da177e4 | 1165 | |
eeeb0374 | 1166 | rc = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len); |
1da177e4 LT |
1167 | if (rc) |
1168 | goto out_kfree_skb; | |
1169 | ||
1170 | /* | |
1171 | * If the Q BIT Include socket option is in force, the first | |
1172 | * byte of the user data is the logical value of the Q Bit. | |
1173 | */ | |
cb863ffd | 1174 | if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) { |
1da177e4 LT |
1175 | qbit = skb->data[0]; |
1176 | skb_pull(skb, 1); | |
1177 | } | |
1178 | ||
1179 | /* | |
1180 | * Push down the X.25 header | |
1181 | */ | |
1182 | SOCK_DEBUG(sk, "x25_sendmsg: Building X.25 Header.\n"); | |
1183 | ||
1184 | if (msg->msg_flags & MSG_OOB) { | |
1185 | if (x25->neighbour->extended) { | |
1186 | asmptr = skb_push(skb, X25_STD_MIN_LEN); | |
1187 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ; | |
1188 | *asmptr++ = (x25->lci >> 0) & 0xFF; | |
1189 | *asmptr++ = X25_INTERRUPT; | |
1190 | } else { | |
1191 | asmptr = skb_push(skb, X25_STD_MIN_LEN); | |
1192 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ; | |
1193 | *asmptr++ = (x25->lci >> 0) & 0xFF; | |
1194 | *asmptr++ = X25_INTERRUPT; | |
1195 | } | |
1196 | } else { | |
1197 | if (x25->neighbour->extended) { | |
1198 | /* Build an Extended X.25 header */ | |
1199 | asmptr = skb_push(skb, X25_EXT_MIN_LEN); | |
1200 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ; | |
1201 | *asmptr++ = (x25->lci >> 0) & 0xFF; | |
1202 | *asmptr++ = X25_DATA; | |
1203 | *asmptr++ = X25_DATA; | |
1204 | } else { | |
1205 | /* Build an Standard X.25 header */ | |
1206 | asmptr = skb_push(skb, X25_STD_MIN_LEN); | |
1207 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ; | |
1208 | *asmptr++ = (x25->lci >> 0) & 0xFF; | |
1209 | *asmptr++ = X25_DATA; | |
1210 | } | |
1211 | ||
1212 | if (qbit) | |
1213 | skb->data[0] |= X25_Q_BIT; | |
1214 | } | |
1215 | ||
1216 | SOCK_DEBUG(sk, "x25_sendmsg: Built header.\n"); | |
1217 | SOCK_DEBUG(sk, "x25_sendmsg: Transmitting buffer\n"); | |
1218 | ||
1219 | rc = -ENOTCONN; | |
1220 | if (sk->sk_state != TCP_ESTABLISHED) | |
1221 | goto out_kfree_skb; | |
1222 | ||
1223 | if (msg->msg_flags & MSG_OOB) | |
1224 | skb_queue_tail(&x25->interrupt_out_queue, skb); | |
1225 | else { | |
8db09f26 RK |
1226 | rc = x25_output(sk, skb); |
1227 | len = rc; | |
1228 | if (rc < 0) | |
1da177e4 | 1229 | kfree_skb(skb); |
cb863ffd | 1230 | else if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) |
1da177e4 LT |
1231 | len++; |
1232 | } | |
1233 | ||
1234 | /* | |
1235 | * lock_sock() is currently only used to serialize this x25_kick() | |
1236 | * against input-driven x25_kick() calls. It currently only blocks | |
1237 | * incoming packets for this socket and does not protect against | |
1238 | * any other socket state changes and is not called from anywhere | |
1239 | * else. As x25_kick() cannot block and as long as all socket | |
1240 | * operations are BKL-wrapped, we don't need take to care about | |
1241 | * purging the backlog queue in x25_release(). | |
1242 | * | |
1243 | * Using lock_sock() to protect all socket operations entirely | |
1244 | * (and making the whole x25 stack SMP aware) unfortunately would | |
1245 | * require major changes to {send,recv}msg and skb allocation methods. | |
1246 | * -> 2.5 ;) | |
1247 | */ | |
1248 | lock_sock(sk); | |
1249 | x25_kick(sk); | |
1250 | release_sock(sk); | |
1251 | rc = len; | |
1252 | out: | |
91774904 | 1253 | unlock_kernel(); |
1da177e4 LT |
1254 | return rc; |
1255 | out_kfree_skb: | |
1256 | kfree_skb(skb); | |
1257 | goto out; | |
1258 | } | |
1259 | ||
1260 | ||
1261 | static int x25_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1262 | struct msghdr *msg, size_t size, | |
1263 | int flags) | |
1264 | { | |
1265 | struct sock *sk = sock->sk; | |
1266 | struct x25_sock *x25 = x25_sk(sk); | |
1267 | struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name; | |
1268 | size_t copied; | |
1269 | int qbit; | |
1270 | struct sk_buff *skb; | |
1271 | unsigned char *asmptr; | |
1272 | int rc = -ENOTCONN; | |
1273 | ||
91774904 | 1274 | lock_kernel(); |
1da177e4 LT |
1275 | /* |
1276 | * This works for seqpacket too. The receiver has ordered the queue for | |
1277 | * us! We do one quick check first though | |
1278 | */ | |
1279 | if (sk->sk_state != TCP_ESTABLISHED) | |
1280 | goto out; | |
1281 | ||
1282 | if (flags & MSG_OOB) { | |
1283 | rc = -EINVAL; | |
1284 | if (sock_flag(sk, SOCK_URGINLINE) || | |
1285 | !skb_peek(&x25->interrupt_in_queue)) | |
1286 | goto out; | |
1287 | ||
1288 | skb = skb_dequeue(&x25->interrupt_in_queue); | |
1289 | ||
1290 | skb_pull(skb, X25_STD_MIN_LEN); | |
1291 | ||
1292 | /* | |
1293 | * No Q bit information on Interrupt data. | |
1294 | */ | |
cb863ffd | 1295 | if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) { |
1da177e4 LT |
1296 | asmptr = skb_push(skb, 1); |
1297 | *asmptr = 0x00; | |
1298 | } | |
1299 | ||
1300 | msg->msg_flags |= MSG_OOB; | |
1301 | } else { | |
1302 | /* Now we can treat all alike */ | |
1303 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, | |
1304 | flags & MSG_DONTWAIT, &rc); | |
1305 | if (!skb) | |
1306 | goto out; | |
1307 | ||
1308 | qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT; | |
1309 | ||
1310 | skb_pull(skb, x25->neighbour->extended ? | |
1311 | X25_EXT_MIN_LEN : X25_STD_MIN_LEN); | |
1312 | ||
cb863ffd | 1313 | if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) { |
1da177e4 LT |
1314 | asmptr = skb_push(skb, 1); |
1315 | *asmptr = qbit; | |
1316 | } | |
1317 | } | |
1318 | ||
badff6d0 | 1319 | skb_reset_transport_header(skb); |
1da177e4 LT |
1320 | copied = skb->len; |
1321 | ||
1322 | if (copied > size) { | |
1323 | copied = size; | |
1324 | msg->msg_flags |= MSG_TRUNC; | |
1325 | } | |
1326 | ||
f8e1d201 | 1327 | /* Currently, each datagram always contains a complete record */ |
1da177e4 LT |
1328 | msg->msg_flags |= MSG_EOR; |
1329 | ||
1330 | rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
1331 | if (rc) | |
1332 | goto out_free_dgram; | |
1333 | ||
1334 | if (sx25) { | |
1335 | sx25->sx25_family = AF_X25; | |
1336 | sx25->sx25_addr = x25->dest_addr; | |
1337 | } | |
1338 | ||
1339 | msg->msg_namelen = sizeof(struct sockaddr_x25); | |
1340 | ||
1341 | lock_sock(sk); | |
1342 | x25_check_rbuf(sk); | |
1343 | release_sock(sk); | |
1344 | rc = copied; | |
1345 | out_free_dgram: | |
1346 | skb_free_datagram(sk, skb); | |
1347 | out: | |
91774904 | 1348 | unlock_kernel(); |
1da177e4 LT |
1349 | return rc; |
1350 | } | |
1351 | ||
1352 | ||
1353 | static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1354 | { | |
1355 | struct sock *sk = sock->sk; | |
1356 | struct x25_sock *x25 = x25_sk(sk); | |
1357 | void __user *argp = (void __user *)arg; | |
1358 | int rc; | |
1359 | ||
1360 | switch (cmd) { | |
1361 | case TIOCOUTQ: { | |
70be998c | 1362 | int amount; |
31e6d363 | 1363 | |
70be998c | 1364 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
1da177e4 LT |
1365 | if (amount < 0) |
1366 | amount = 0; | |
1367 | rc = put_user(amount, (unsigned int __user *)argp); | |
1368 | break; | |
1369 | } | |
1370 | ||
1371 | case TIOCINQ: { | |
1372 | struct sk_buff *skb; | |
1373 | int amount = 0; | |
1374 | /* | |
1375 | * These two are safe on a single CPU system as | |
1376 | * only user tasks fiddle here | |
1377 | */ | |
54aafbd4 | 1378 | lock_sock(sk); |
1da177e4 LT |
1379 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) |
1380 | amount = skb->len; | |
54aafbd4 | 1381 | release_sock(sk); |
1da177e4 LT |
1382 | rc = put_user(amount, (unsigned int __user *)argp); |
1383 | break; | |
1384 | } | |
1385 | ||
1386 | case SIOCGSTAMP: | |
1387 | rc = -EINVAL; | |
1388 | if (sk) | |
f8e1d201 YH |
1389 | rc = sock_get_timestamp(sk, |
1390 | (struct timeval __user *)argp); | |
1da177e4 | 1391 | break; |
ae40eb1e ED |
1392 | case SIOCGSTAMPNS: |
1393 | rc = -EINVAL; | |
1394 | if (sk) | |
1395 | rc = sock_get_timestampns(sk, | |
1396 | (struct timespec __user *)argp); | |
1397 | break; | |
1da177e4 LT |
1398 | case SIOCGIFADDR: |
1399 | case SIOCSIFADDR: | |
1400 | case SIOCGIFDSTADDR: | |
1401 | case SIOCSIFDSTADDR: | |
1402 | case SIOCGIFBRDADDR: | |
1403 | case SIOCSIFBRDADDR: | |
1404 | case SIOCGIFNETMASK: | |
1405 | case SIOCSIFNETMASK: | |
1406 | case SIOCGIFMETRIC: | |
1407 | case SIOCSIFMETRIC: | |
1408 | rc = -EINVAL; | |
1409 | break; | |
1410 | case SIOCADDRT: | |
1411 | case SIOCDELRT: | |
1412 | rc = -EPERM; | |
1413 | if (!capable(CAP_NET_ADMIN)) | |
1414 | break; | |
1415 | rc = x25_route_ioctl(cmd, argp); | |
1416 | break; | |
1417 | case SIOCX25GSUBSCRIP: | |
1418 | rc = x25_subscr_ioctl(cmd, argp); | |
1419 | break; | |
1420 | case SIOCX25SSUBSCRIP: | |
1421 | rc = -EPERM; | |
1422 | if (!capable(CAP_NET_ADMIN)) | |
1423 | break; | |
1424 | rc = x25_subscr_ioctl(cmd, argp); | |
1425 | break; | |
1426 | case SIOCX25GFACILITIES: { | |
1427 | struct x25_facilities fac = x25->facilities; | |
70be998c | 1428 | lock_kernel(); |
1da177e4 LT |
1429 | rc = copy_to_user(argp, &fac, |
1430 | sizeof(fac)) ? -EFAULT : 0; | |
70be998c | 1431 | unlock_kernel(); |
1da177e4 LT |
1432 | break; |
1433 | } | |
1434 | ||
1435 | case SIOCX25SFACILITIES: { | |
1436 | struct x25_facilities facilities; | |
1437 | rc = -EFAULT; | |
70be998c | 1438 | lock_kernel(); |
1da177e4 LT |
1439 | if (copy_from_user(&facilities, argp, |
1440 | sizeof(facilities))) | |
1441 | break; | |
1442 | rc = -EINVAL; | |
1443 | if (sk->sk_state != TCP_LISTEN && | |
1444 | sk->sk_state != TCP_CLOSE) | |
1445 | break; | |
1446 | if (facilities.pacsize_in < X25_PS16 || | |
1447 | facilities.pacsize_in > X25_PS4096) | |
1448 | break; | |
1449 | if (facilities.pacsize_out < X25_PS16 || | |
1450 | facilities.pacsize_out > X25_PS4096) | |
1451 | break; | |
1452 | if (facilities.winsize_in < 1 || | |
1453 | facilities.winsize_in > 127) | |
1454 | break; | |
ddd0451f JH |
1455 | if (facilities.throughput) { |
1456 | int out = facilities.throughput & 0xf0; | |
1457 | int in = facilities.throughput & 0x0f; | |
1458 | if (!out) | |
1459 | facilities.throughput |= | |
1460 | X25_DEFAULT_THROUGHPUT << 4; | |
1461 | else if (out < 0x30 || out > 0xD0) | |
1462 | break; | |
1463 | if (!in) | |
1464 | facilities.throughput |= | |
1465 | X25_DEFAULT_THROUGHPUT; | |
1466 | else if (in < 0x03 || in > 0x0D) | |
1467 | break; | |
1468 | } | |
ebc3f64b | 1469 | if (facilities.reverse && |
06a96b33 | 1470 | (facilities.reverse & 0x81) != 0x81) |
1da177e4 LT |
1471 | break; |
1472 | x25->facilities = facilities; | |
1473 | rc = 0; | |
70be998c | 1474 | unlock_kernel(); |
1da177e4 LT |
1475 | break; |
1476 | } | |
1477 | ||
a64b7b93 | 1478 | case SIOCX25GDTEFACILITIES: { |
70be998c | 1479 | lock_kernel(); |
f8e1d201 | 1480 | rc = copy_to_user(argp, &x25->dte_facilities, |
a64b7b93 | 1481 | sizeof(x25->dte_facilities)); |
70be998c | 1482 | unlock_kernel(); |
a64b7b93 SP |
1483 | if (rc) |
1484 | rc = -EFAULT; | |
f8e1d201 YH |
1485 | break; |
1486 | } | |
a64b7b93 | 1487 | |
f8e1d201 YH |
1488 | case SIOCX25SDTEFACILITIES: { |
1489 | struct x25_dte_facilities dtefacs; | |
1490 | rc = -EFAULT; | |
70be998c | 1491 | lock_kernel(); |
f8e1d201 | 1492 | if (copy_from_user(&dtefacs, argp, sizeof(dtefacs))) |
a64b7b93 SP |
1493 | break; |
1494 | rc = -EINVAL; | |
1495 | if (sk->sk_state != TCP_LISTEN && | |
1496 | sk->sk_state != TCP_CLOSE) | |
1497 | break; | |
1498 | if (dtefacs.calling_len > X25_MAX_AE_LEN) | |
1499 | break; | |
1500 | if (dtefacs.calling_ae == NULL) | |
1501 | break; | |
1502 | if (dtefacs.called_len > X25_MAX_AE_LEN) | |
1503 | break; | |
1504 | if (dtefacs.called_ae == NULL) | |
1505 | break; | |
1506 | x25->dte_facilities = dtefacs; | |
1507 | rc = 0; | |
70be998c | 1508 | unlock_kernel(); |
a64b7b93 SP |
1509 | break; |
1510 | } | |
1511 | ||
1da177e4 LT |
1512 | case SIOCX25GCALLUSERDATA: { |
1513 | struct x25_calluserdata cud = x25->calluserdata; | |
70be998c | 1514 | lock_kernel(); |
1da177e4 LT |
1515 | rc = copy_to_user(argp, &cud, |
1516 | sizeof(cud)) ? -EFAULT : 0; | |
70be998c | 1517 | unlock_kernel(); |
1da177e4 LT |
1518 | break; |
1519 | } | |
1520 | ||
1521 | case SIOCX25SCALLUSERDATA: { | |
1522 | struct x25_calluserdata calluserdata; | |
1523 | ||
1524 | rc = -EFAULT; | |
70be998c | 1525 | lock_kernel(); |
1da177e4 LT |
1526 | if (copy_from_user(&calluserdata, argp, |
1527 | sizeof(calluserdata))) | |
1528 | break; | |
1529 | rc = -EINVAL; | |
1530 | if (calluserdata.cudlength > X25_MAX_CUD_LEN) | |
1531 | break; | |
1532 | x25->calluserdata = calluserdata; | |
70be998c | 1533 | unlock_kernel(); |
1da177e4 LT |
1534 | rc = 0; |
1535 | break; | |
1536 | } | |
1537 | ||
1538 | case SIOCX25GCAUSEDIAG: { | |
1539 | struct x25_causediag causediag; | |
70be998c | 1540 | lock_kernel(); |
1da177e4 LT |
1541 | causediag = x25->causediag; |
1542 | rc = copy_to_user(argp, &causediag, | |
1543 | sizeof(causediag)) ? -EFAULT : 0; | |
70be998c | 1544 | unlock_kernel(); |
1da177e4 LT |
1545 | break; |
1546 | } | |
1547 | ||
386e50cc AH |
1548 | case SIOCX25SCAUSEDIAG: { |
1549 | struct x25_causediag causediag; | |
1550 | rc = -EFAULT; | |
70be998c | 1551 | lock_kernel(); |
386e50cc AH |
1552 | if (copy_from_user(&causediag, argp, sizeof(causediag))) |
1553 | break; | |
1554 | x25->causediag = causediag; | |
70be998c | 1555 | unlock_kernel(); |
386e50cc AH |
1556 | rc = 0; |
1557 | break; | |
1558 | ||
1559 | } | |
1560 | ||
cb65d506 SP |
1561 | case SIOCX25SCUDMATCHLEN: { |
1562 | struct x25_subaddr sub_addr; | |
1563 | rc = -EINVAL; | |
70be998c | 1564 | lock_kernel(); |
cb65d506 SP |
1565 | if(sk->sk_state != TCP_CLOSE) |
1566 | break; | |
1567 | rc = -EFAULT; | |
1568 | if (copy_from_user(&sub_addr, argp, | |
1569 | sizeof(sub_addr))) | |
1570 | break; | |
f8e1d201 | 1571 | rc = -EINVAL; |
cb65d506 SP |
1572 | if(sub_addr.cudmatchlength > X25_MAX_CUD_LEN) |
1573 | break; | |
1574 | x25->cudmatchlength = sub_addr.cudmatchlength; | |
70be998c | 1575 | unlock_kernel(); |
cb65d506 SP |
1576 | rc = 0; |
1577 | break; | |
1578 | } | |
1579 | ||
ebc3f64b SP |
1580 | case SIOCX25CALLACCPTAPPRV: { |
1581 | rc = -EINVAL; | |
70be998c | 1582 | lock_kernel(); |
ebc3f64b SP |
1583 | if (sk->sk_state != TCP_CLOSE) |
1584 | break; | |
37cda787 | 1585 | clear_bit(X25_ACCPT_APPRV_FLAG, &x25->flags); |
70be998c | 1586 | unlock_kernel(); |
ebc3f64b SP |
1587 | rc = 0; |
1588 | break; | |
1589 | } | |
1590 | ||
1591 | case SIOCX25SENDCALLACCPT: { | |
1592 | rc = -EINVAL; | |
70be998c | 1593 | lock_kernel(); |
ebc3f64b SP |
1594 | if (sk->sk_state != TCP_ESTABLISHED) |
1595 | break; | |
37cda787 | 1596 | /* must call accptapprv above */ |
1597 | if (test_bit(X25_ACCPT_APPRV_FLAG, &x25->flags)) | |
ebc3f64b SP |
1598 | break; |
1599 | x25_write_internal(sk, X25_CALL_ACCEPTED); | |
1600 | x25->state = X25_STATE_3; | |
70be998c | 1601 | unlock_kernel(); |
ebc3f64b SP |
1602 | rc = 0; |
1603 | break; | |
1604 | } | |
1605 | ||
f8e1d201 | 1606 | default: |
b5e5fa5e | 1607 | rc = -ENOIOCTLCMD; |
1da177e4 LT |
1608 | break; |
1609 | } | |
1610 | ||
1611 | return rc; | |
1612 | } | |
1613 | ||
ec1b4cf7 | 1614 | static const struct net_proto_family x25_family_ops = { |
1da177e4 LT |
1615 | .family = AF_X25, |
1616 | .create = x25_create, | |
1617 | .owner = THIS_MODULE, | |
1618 | }; | |
1619 | ||
1b06e6ba SP |
1620 | #ifdef CONFIG_COMPAT |
1621 | static int compat_x25_subscr_ioctl(unsigned int cmd, | |
1622 | struct compat_x25_subscrip_struct __user *x25_subscr32) | |
1623 | { | |
1624 | struct compat_x25_subscrip_struct x25_subscr; | |
1625 | struct x25_neigh *nb; | |
1626 | struct net_device *dev; | |
1627 | int rc = -EINVAL; | |
1628 | ||
1629 | rc = -EFAULT; | |
1630 | if (copy_from_user(&x25_subscr, x25_subscr32, sizeof(*x25_subscr32))) | |
1631 | goto out; | |
1632 | ||
1633 | rc = -EINVAL; | |
1634 | dev = x25_dev_get(x25_subscr.device); | |
1635 | if (dev == NULL) | |
1636 | goto out; | |
1637 | ||
1638 | nb = x25_get_neigh(dev); | |
1639 | if (nb == NULL) | |
1640 | goto out_dev_put; | |
1641 | ||
1642 | dev_put(dev); | |
1643 | ||
1644 | if (cmd == SIOCX25GSUBSCRIP) { | |
5595a1a5 | 1645 | read_lock_bh(&x25_neigh_list_lock); |
1b06e6ba SP |
1646 | x25_subscr.extended = nb->extended; |
1647 | x25_subscr.global_facil_mask = nb->global_facil_mask; | |
5595a1a5 | 1648 | read_unlock_bh(&x25_neigh_list_lock); |
1b06e6ba SP |
1649 | rc = copy_to_user(x25_subscr32, &x25_subscr, |
1650 | sizeof(*x25_subscr32)) ? -EFAULT : 0; | |
1651 | } else { | |
1652 | rc = -EINVAL; | |
1653 | if (x25_subscr.extended == 0 || x25_subscr.extended == 1) { | |
1654 | rc = 0; | |
5595a1a5 | 1655 | write_lock_bh(&x25_neigh_list_lock); |
1b06e6ba SP |
1656 | nb->extended = x25_subscr.extended; |
1657 | nb->global_facil_mask = x25_subscr.global_facil_mask; | |
5595a1a5 | 1658 | write_unlock_bh(&x25_neigh_list_lock); |
1b06e6ba SP |
1659 | } |
1660 | } | |
1661 | x25_neigh_put(nb); | |
1662 | out: | |
1663 | return rc; | |
1664 | out_dev_put: | |
1665 | dev_put(dev); | |
1666 | goto out; | |
1667 | } | |
1668 | ||
1669 | static int compat_x25_ioctl(struct socket *sock, unsigned int cmd, | |
1670 | unsigned long arg) | |
1671 | { | |
1672 | void __user *argp = compat_ptr(arg); | |
1673 | struct sock *sk = sock->sk; | |
1674 | ||
1675 | int rc = -ENOIOCTLCMD; | |
1676 | ||
1677 | switch(cmd) { | |
1678 | case TIOCOUTQ: | |
1679 | case TIOCINQ: | |
1680 | rc = x25_ioctl(sock, cmd, (unsigned long)argp); | |
1681 | break; | |
1682 | case SIOCGSTAMP: | |
1683 | rc = -EINVAL; | |
1684 | if (sk) | |
1685 | rc = compat_sock_get_timestamp(sk, | |
1686 | (struct timeval __user*)argp); | |
1687 | break; | |
ae40eb1e ED |
1688 | case SIOCGSTAMPNS: |
1689 | rc = -EINVAL; | |
1690 | if (sk) | |
1691 | rc = compat_sock_get_timestampns(sk, | |
1692 | (struct timespec __user*)argp); | |
1693 | break; | |
1b06e6ba SP |
1694 | case SIOCGIFADDR: |
1695 | case SIOCSIFADDR: | |
1696 | case SIOCGIFDSTADDR: | |
1697 | case SIOCSIFDSTADDR: | |
1698 | case SIOCGIFBRDADDR: | |
1699 | case SIOCSIFBRDADDR: | |
1700 | case SIOCGIFNETMASK: | |
1701 | case SIOCSIFNETMASK: | |
1702 | case SIOCGIFMETRIC: | |
1703 | case SIOCSIFMETRIC: | |
1704 | rc = -EINVAL; | |
1705 | break; | |
1706 | case SIOCADDRT: | |
1707 | case SIOCDELRT: | |
1708 | rc = -EPERM; | |
1709 | if (!capable(CAP_NET_ADMIN)) | |
1710 | break; | |
1711 | rc = x25_route_ioctl(cmd, argp); | |
1712 | break; | |
1713 | case SIOCX25GSUBSCRIP: | |
1714 | rc = compat_x25_subscr_ioctl(cmd, argp); | |
1715 | break; | |
1716 | case SIOCX25SSUBSCRIP: | |
1717 | rc = -EPERM; | |
1718 | if (!capable(CAP_NET_ADMIN)) | |
1719 | break; | |
1720 | rc = compat_x25_subscr_ioctl(cmd, argp); | |
1721 | break; | |
1722 | case SIOCX25GFACILITIES: | |
1723 | case SIOCX25SFACILITIES: | |
9a6b9f2e SP |
1724 | case SIOCX25GDTEFACILITIES: |
1725 | case SIOCX25SDTEFACILITIES: | |
1b06e6ba SP |
1726 | case SIOCX25GCALLUSERDATA: |
1727 | case SIOCX25SCALLUSERDATA: | |
1728 | case SIOCX25GCAUSEDIAG: | |
386e50cc | 1729 | case SIOCX25SCAUSEDIAG: |
1b06e6ba SP |
1730 | case SIOCX25SCUDMATCHLEN: |
1731 | case SIOCX25CALLACCPTAPPRV: | |
1732 | case SIOCX25SENDCALLACCPT: | |
1733 | rc = x25_ioctl(sock, cmd, (unsigned long)argp); | |
1734 | break; | |
1735 | default: | |
1736 | rc = -ENOIOCTLCMD; | |
1737 | break; | |
1738 | } | |
1739 | return rc; | |
1740 | } | |
1741 | #endif | |
1742 | ||
91774904 | 1743 | static const struct proto_ops x25_proto_ops = { |
1da177e4 LT |
1744 | .family = AF_X25, |
1745 | .owner = THIS_MODULE, | |
1746 | .release = x25_release, | |
1747 | .bind = x25_bind, | |
1748 | .connect = x25_connect, | |
1749 | .socketpair = sock_no_socketpair, | |
1750 | .accept = x25_accept, | |
1751 | .getname = x25_getname, | |
768190fd | 1752 | .poll = datagram_poll, |
1da177e4 | 1753 | .ioctl = x25_ioctl, |
1b06e6ba SP |
1754 | #ifdef CONFIG_COMPAT |
1755 | .compat_ioctl = compat_x25_ioctl, | |
1756 | #endif | |
1da177e4 LT |
1757 | .listen = x25_listen, |
1758 | .shutdown = sock_no_shutdown, | |
1759 | .setsockopt = x25_setsockopt, | |
1760 | .getsockopt = x25_getsockopt, | |
1761 | .sendmsg = x25_sendmsg, | |
1762 | .recvmsg = x25_recvmsg, | |
1763 | .mmap = sock_no_mmap, | |
1764 | .sendpage = sock_no_sendpage, | |
1765 | }; | |
1766 | ||
7546dd97 | 1767 | static struct packet_type x25_packet_type __read_mostly = { |
09640e63 | 1768 | .type = cpu_to_be16(ETH_P_X25), |
1da177e4 LT |
1769 | .func = x25_lapb_receive_frame, |
1770 | }; | |
1771 | ||
1772 | static struct notifier_block x25_dev_notifier = { | |
1773 | .notifier_call = x25_device_event, | |
1774 | }; | |
1775 | ||
1776 | void x25_kill_by_neigh(struct x25_neigh *nb) | |
1777 | { | |
1778 | struct sock *s; | |
1779 | struct hlist_node *node; | |
1780 | ||
1781 | write_lock_bh(&x25_list_lock); | |
1782 | ||
1783 | sk_for_each(s, node, &x25_list) | |
1784 | if (x25_sk(s)->neighbour == nb) | |
1785 | x25_disconnect(s, ENETUNREACH, 0, 0); | |
1786 | ||
1787 | write_unlock_bh(&x25_list_lock); | |
95a9dc43 AH |
1788 | |
1789 | /* Remove any related forwards */ | |
1790 | x25_clear_forward_by_dev(nb->dev); | |
1da177e4 LT |
1791 | } |
1792 | ||
1793 | static int __init x25_init(void) | |
1794 | { | |
1795 | int rc = proto_register(&x25_proto, 0); | |
1796 | ||
1797 | if (rc != 0) | |
1798 | goto out; | |
1799 | ||
1fd975a0 | 1800 | rc = sock_register(&x25_family_ops); |
1801 | if (rc != 0) | |
1802 | goto out_proto; | |
1da177e4 LT |
1803 | |
1804 | dev_add_pack(&x25_packet_type); | |
1805 | ||
1fd975a0 | 1806 | rc = register_netdevice_notifier(&x25_dev_notifier); |
1807 | if (rc != 0) | |
1808 | goto out_sock; | |
1da177e4 | 1809 | |
a44562e4 | 1810 | printk(KERN_INFO "X.25 for Linux Version 0.2\n"); |
1da177e4 | 1811 | |
1da177e4 | 1812 | x25_register_sysctl(); |
1fd975a0 | 1813 | rc = x25_proc_init(); |
1814 | if (rc != 0) | |
1815 | goto out_dev; | |
1da177e4 LT |
1816 | out: |
1817 | return rc; | |
1fd975a0 | 1818 | out_dev: |
1819 | unregister_netdevice_notifier(&x25_dev_notifier); | |
1820 | out_sock: | |
1821 | sock_unregister(AF_X25); | |
1822 | out_proto: | |
1823 | proto_unregister(&x25_proto); | |
1824 | goto out; | |
1da177e4 LT |
1825 | } |
1826 | module_init(x25_init); | |
1827 | ||
1828 | static void __exit x25_exit(void) | |
1829 | { | |
1830 | x25_proc_exit(); | |
1831 | x25_link_free(); | |
1832 | x25_route_free(); | |
1833 | ||
1da177e4 | 1834 | x25_unregister_sysctl(); |
1da177e4 LT |
1835 | |
1836 | unregister_netdevice_notifier(&x25_dev_notifier); | |
1837 | ||
1838 | dev_remove_pack(&x25_packet_type); | |
1839 | ||
1840 | sock_unregister(AF_X25); | |
1841 | proto_unregister(&x25_proto); | |
1842 | } | |
1843 | module_exit(x25_exit); | |
1844 | ||
1845 | MODULE_AUTHOR("Jonathan Naylor <g4klx@g4klx.demon.co.uk>"); | |
1846 | MODULE_DESCRIPTION("The X.25 Packet Layer network layer protocol"); | |
1847 | MODULE_LICENSE("GPL"); | |
1848 | MODULE_ALIAS_NETPROTO(PF_X25); |