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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 | ||
91774904 | 456 | lock_kernel(); |
1da177e4 LT |
457 | if (level != SOL_X25 || optname != X25_QBITINCL) |
458 | goto out; | |
459 | ||
460 | rc = -EINVAL; | |
461 | if (optlen < sizeof(int)) | |
462 | goto out; | |
463 | ||
464 | rc = -EFAULT; | |
465 | if (get_user(opt, (int __user *)optval)) | |
466 | goto out; | |
467 | ||
468 | x25_sk(sk)->qbitincl = !!opt; | |
469 | rc = 0; | |
470 | out: | |
91774904 | 471 | unlock_kernel(); |
1da177e4 LT |
472 | return rc; |
473 | } | |
474 | ||
475 | static int x25_getsockopt(struct socket *sock, int level, int optname, | |
476 | char __user *optval, int __user *optlen) | |
477 | { | |
478 | struct sock *sk = sock->sk; | |
479 | int val, len, rc = -ENOPROTOOPT; | |
f8e1d201 | 480 | |
91774904 | 481 | lock_kernel(); |
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 | ||
499 | val = x25_sk(sk)->qbitincl; | |
500 | rc = copy_to_user(optval, &val, len) ? -EFAULT : 0; | |
501 | out: | |
91774904 | 502 | unlock_kernel(); |
1da177e4 LT |
503 | return rc; |
504 | } | |
505 | ||
506 | static int x25_listen(struct socket *sock, int backlog) | |
507 | { | |
508 | struct sock *sk = sock->sk; | |
509 | int rc = -EOPNOTSUPP; | |
510 | ||
91774904 | 511 | lock_kernel(); |
1da177e4 LT |
512 | if (sk->sk_state != TCP_LISTEN) { |
513 | memset(&x25_sk(sk)->dest_addr, 0, X25_ADDR_LEN); | |
514 | sk->sk_max_ack_backlog = backlog; | |
515 | sk->sk_state = TCP_LISTEN; | |
516 | rc = 0; | |
517 | } | |
91774904 | 518 | unlock_kernel(); |
1da177e4 LT |
519 | |
520 | return rc; | |
521 | } | |
522 | ||
523 | static struct proto x25_proto = { | |
524 | .name = "X25", | |
525 | .owner = THIS_MODULE, | |
526 | .obj_size = sizeof(struct x25_sock), | |
527 | }; | |
528 | ||
1b8d7ae4 | 529 | static struct sock *x25_alloc_socket(struct net *net) |
1da177e4 LT |
530 | { |
531 | struct x25_sock *x25; | |
6257ff21 | 532 | struct sock *sk = sk_alloc(net, AF_X25, GFP_ATOMIC, &x25_proto); |
1da177e4 LT |
533 | |
534 | if (!sk) | |
535 | goto out; | |
536 | ||
537 | sock_init_data(NULL, sk); | |
538 | ||
539 | x25 = x25_sk(sk); | |
540 | skb_queue_head_init(&x25->ack_queue); | |
541 | skb_queue_head_init(&x25->fragment_queue); | |
542 | skb_queue_head_init(&x25->interrupt_in_queue); | |
543 | skb_queue_head_init(&x25->interrupt_out_queue); | |
544 | out: | |
545 | return sk; | |
546 | } | |
547 | ||
3f378b68 EP |
548 | static int x25_create(struct net *net, struct socket *sock, int protocol, |
549 | int kern) | |
1da177e4 LT |
550 | { |
551 | struct sock *sk; | |
552 | struct x25_sock *x25; | |
b18e7a06 | 553 | int rc = -EAFNOSUPPORT; |
1da177e4 | 554 | |
09ad9bc7 | 555 | if (!net_eq(net, &init_net)) |
b18e7a06 | 556 | goto out; |
557 | ||
558 | rc = -ESOCKTNOSUPPORT; | |
559 | if (sock->type != SOCK_SEQPACKET) | |
560 | goto out; | |
1b8d7ae4 | 561 | |
b18e7a06 | 562 | rc = -EINVAL; |
563 | if (protocol) | |
1da177e4 LT |
564 | goto out; |
565 | ||
b18e7a06 | 566 | rc = -ENOBUFS; |
1b8d7ae4 | 567 | if ((sk = x25_alloc_socket(net)) == NULL) |
1da177e4 LT |
568 | goto out; |
569 | ||
570 | x25 = x25_sk(sk); | |
571 | ||
572 | sock_init_data(sock, sk); | |
573 | ||
574 | x25_init_timers(sk); | |
575 | ||
576 | sock->ops = &x25_proto_ops; | |
577 | sk->sk_protocol = protocol; | |
578 | sk->sk_backlog_rcv = x25_backlog_rcv; | |
579 | ||
580 | x25->t21 = sysctl_x25_call_request_timeout; | |
581 | x25->t22 = sysctl_x25_reset_request_timeout; | |
582 | x25->t23 = sysctl_x25_clear_request_timeout; | |
583 | x25->t2 = sysctl_x25_ack_holdback_timeout; | |
584 | x25->state = X25_STATE_0; | |
cb65d506 | 585 | x25->cudmatchlength = 0; |
ebc3f64b SP |
586 | x25->accptapprv = X25_DENY_ACCPT_APPRV; /* normally no cud */ |
587 | /* on call accept */ | |
1da177e4 LT |
588 | |
589 | x25->facilities.winsize_in = X25_DEFAULT_WINDOW_SIZE; | |
590 | x25->facilities.winsize_out = X25_DEFAULT_WINDOW_SIZE; | |
591 | x25->facilities.pacsize_in = X25_DEFAULT_PACKET_SIZE; | |
592 | x25->facilities.pacsize_out = X25_DEFAULT_PACKET_SIZE; | |
ddd0451f JH |
593 | x25->facilities.throughput = 0; /* by default don't negotiate |
594 | throughput */ | |
1da177e4 | 595 | x25->facilities.reverse = X25_DEFAULT_REVERSE; |
f8e1d201 YH |
596 | x25->dte_facilities.calling_len = 0; |
597 | x25->dte_facilities.called_len = 0; | |
598 | memset(x25->dte_facilities.called_ae, '\0', | |
599 | sizeof(x25->dte_facilities.called_ae)); | |
600 | memset(x25->dte_facilities.calling_ae, '\0', | |
601 | sizeof(x25->dte_facilities.calling_ae)); | |
a64b7b93 | 602 | |
1da177e4 LT |
603 | rc = 0; |
604 | out: | |
605 | return rc; | |
606 | } | |
607 | ||
608 | static struct sock *x25_make_new(struct sock *osk) | |
609 | { | |
610 | struct sock *sk = NULL; | |
611 | struct x25_sock *x25, *ox25; | |
612 | ||
613 | if (osk->sk_type != SOCK_SEQPACKET) | |
614 | goto out; | |
615 | ||
3b1e0a65 | 616 | if ((sk = x25_alloc_socket(sock_net(osk))) == NULL) |
1da177e4 LT |
617 | goto out; |
618 | ||
619 | x25 = x25_sk(sk); | |
620 | ||
621 | sk->sk_type = osk->sk_type; | |
1da177e4 LT |
622 | sk->sk_priority = osk->sk_priority; |
623 | sk->sk_protocol = osk->sk_protocol; | |
624 | sk->sk_rcvbuf = osk->sk_rcvbuf; | |
625 | sk->sk_sndbuf = osk->sk_sndbuf; | |
626 | sk->sk_state = TCP_ESTABLISHED; | |
1da177e4 | 627 | sk->sk_backlog_rcv = osk->sk_backlog_rcv; |
a20a8554 | 628 | sock_copy_flags(sk, osk); |
1da177e4 LT |
629 | |
630 | ox25 = x25_sk(osk); | |
631 | x25->t21 = ox25->t21; | |
632 | x25->t22 = ox25->t22; | |
633 | x25->t23 = ox25->t23; | |
634 | x25->t2 = ox25->t2; | |
635 | x25->facilities = ox25->facilities; | |
636 | x25->qbitincl = ox25->qbitincl; | |
a64b7b93 | 637 | x25->dte_facilities = ox25->dte_facilities; |
cb65d506 | 638 | x25->cudmatchlength = ox25->cudmatchlength; |
ebc3f64b | 639 | x25->accptapprv = ox25->accptapprv; |
1da177e4 LT |
640 | |
641 | x25_init_timers(sk); | |
642 | out: | |
643 | return sk; | |
644 | } | |
645 | ||
646 | static int x25_release(struct socket *sock) | |
647 | { | |
648 | struct sock *sk = sock->sk; | |
649 | struct x25_sock *x25; | |
650 | ||
91774904 | 651 | lock_kernel(); |
1da177e4 LT |
652 | if (!sk) |
653 | goto out; | |
654 | ||
655 | x25 = x25_sk(sk); | |
656 | ||
657 | switch (x25->state) { | |
658 | ||
659 | case X25_STATE_0: | |
660 | case X25_STATE_2: | |
661 | x25_disconnect(sk, 0, 0, 0); | |
662 | x25_destroy_socket(sk); | |
663 | goto out; | |
664 | ||
665 | case X25_STATE_1: | |
666 | case X25_STATE_3: | |
667 | case X25_STATE_4: | |
668 | x25_clear_queues(sk); | |
669 | x25_write_internal(sk, X25_CLEAR_REQUEST); | |
670 | x25_start_t23timer(sk); | |
671 | x25->state = X25_STATE_2; | |
672 | sk->sk_state = TCP_CLOSE; | |
673 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
674 | sk->sk_state_change(sk); | |
675 | sock_set_flag(sk, SOCK_DEAD); | |
676 | sock_set_flag(sk, SOCK_DESTROY); | |
677 | break; | |
678 | } | |
679 | ||
c751e4f8 | 680 | sock_orphan(sk); |
1da177e4 | 681 | out: |
91774904 | 682 | unlock_kernel(); |
1da177e4 LT |
683 | return 0; |
684 | } | |
685 | ||
686 | static int x25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
687 | { | |
688 | struct sock *sk = sock->sk; | |
689 | struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr; | |
a9288525 | 690 | int len, i, rc = 0; |
1da177e4 | 691 | |
91774904 | 692 | lock_kernel(); |
1da177e4 LT |
693 | if (!sock_flag(sk, SOCK_ZAPPED) || |
694 | addr_len != sizeof(struct sockaddr_x25) || | |
91774904 AB |
695 | addr->sx25_family != AF_X25) { |
696 | rc = -EINVAL; | |
697 | goto out; | |
698 | } | |
1da177e4 | 699 | |
a9288525 | 700 | len = strlen(addr->sx25_addr.x25_addr); |
701 | for (i = 0; i < len; i++) { | |
702 | if (!isdigit(addr->sx25_addr.x25_addr[i])) { | |
703 | rc = -EINVAL; | |
704 | goto out; | |
705 | } | |
706 | } | |
707 | ||
1da177e4 LT |
708 | x25_sk(sk)->source_addr = addr->sx25_addr; |
709 | x25_insert_socket(sk); | |
710 | sock_reset_flag(sk, SOCK_ZAPPED); | |
711 | SOCK_DEBUG(sk, "x25_bind: socket is bound\n"); | |
91774904 AB |
712 | out: |
713 | unlock_kernel(); | |
714 | return rc; | |
1da177e4 LT |
715 | } |
716 | ||
717 | static int x25_wait_for_connection_establishment(struct sock *sk) | |
718 | { | |
719 | DECLARE_WAITQUEUE(wait, current); | |
f8e1d201 | 720 | int rc; |
1da177e4 LT |
721 | |
722 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
723 | for (;;) { | |
724 | __set_current_state(TASK_INTERRUPTIBLE); | |
725 | rc = -ERESTARTSYS; | |
726 | if (signal_pending(current)) | |
727 | break; | |
728 | rc = sock_error(sk); | |
729 | if (rc) { | |
730 | sk->sk_socket->state = SS_UNCONNECTED; | |
731 | break; | |
732 | } | |
733 | rc = 0; | |
734 | if (sk->sk_state != TCP_ESTABLISHED) { | |
735 | release_sock(sk); | |
736 | schedule(); | |
737 | lock_sock(sk); | |
738 | } else | |
739 | break; | |
740 | } | |
741 | __set_current_state(TASK_RUNNING); | |
742 | remove_wait_queue(sk->sk_sleep, &wait); | |
743 | return rc; | |
744 | } | |
745 | ||
746 | static int x25_connect(struct socket *sock, struct sockaddr *uaddr, | |
747 | int addr_len, int flags) | |
748 | { | |
749 | struct sock *sk = sock->sk; | |
750 | struct x25_sock *x25 = x25_sk(sk); | |
751 | struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr; | |
752 | struct x25_route *rt; | |
753 | int rc = 0; | |
754 | ||
91774904 | 755 | lock_kernel(); |
1da177e4 LT |
756 | lock_sock(sk); |
757 | if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { | |
758 | sock->state = SS_CONNECTED; | |
759 | goto out; /* Connect completed during a ERESTARTSYS event */ | |
760 | } | |
761 | ||
762 | rc = -ECONNREFUSED; | |
763 | if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { | |
764 | sock->state = SS_UNCONNECTED; | |
765 | goto out; | |
766 | } | |
767 | ||
768 | rc = -EISCONN; /* No reconnect on a seqpacket socket */ | |
769 | if (sk->sk_state == TCP_ESTABLISHED) | |
770 | goto out; | |
771 | ||
f8e1d201 | 772 | sk->sk_state = TCP_CLOSE; |
1da177e4 LT |
773 | sock->state = SS_UNCONNECTED; |
774 | ||
775 | rc = -EINVAL; | |
776 | if (addr_len != sizeof(struct sockaddr_x25) || | |
777 | addr->sx25_family != AF_X25) | |
778 | goto out; | |
779 | ||
780 | rc = -ENETUNREACH; | |
781 | rt = x25_get_route(&addr->sx25_addr); | |
782 | if (!rt) | |
783 | goto out; | |
784 | ||
785 | x25->neighbour = x25_get_neigh(rt->dev); | |
786 | if (!x25->neighbour) | |
787 | goto out_put_route; | |
788 | ||
789 | x25_limit_facilities(&x25->facilities, x25->neighbour); | |
790 | ||
791 | x25->lci = x25_new_lci(x25->neighbour); | |
792 | if (!x25->lci) | |
793 | goto out_put_neigh; | |
794 | ||
795 | rc = -EINVAL; | |
796 | if (sock_flag(sk, SOCK_ZAPPED)) /* Must bind first - autobinding does not work */ | |
797 | goto out_put_neigh; | |
798 | ||
799 | if (!strcmp(x25->source_addr.x25_addr, null_x25_address.x25_addr)) | |
800 | memset(&x25->source_addr, '\0', X25_ADDR_LEN); | |
801 | ||
802 | x25->dest_addr = addr->sx25_addr; | |
803 | ||
804 | /* Move to connecting socket, start sending Connect Requests */ | |
805 | sock->state = SS_CONNECTING; | |
806 | sk->sk_state = TCP_SYN_SENT; | |
807 | ||
808 | x25->state = X25_STATE_1; | |
809 | ||
810 | x25_write_internal(sk, X25_CALL_REQUEST); | |
811 | ||
812 | x25_start_heartbeat(sk); | |
813 | x25_start_t21timer(sk); | |
814 | ||
815 | /* Now the loop */ | |
816 | rc = -EINPROGRESS; | |
817 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) | |
818 | goto out_put_neigh; | |
819 | ||
820 | rc = x25_wait_for_connection_establishment(sk); | |
821 | if (rc) | |
822 | goto out_put_neigh; | |
823 | ||
824 | sock->state = SS_CONNECTED; | |
825 | rc = 0; | |
826 | out_put_neigh: | |
827 | if (rc) | |
828 | x25_neigh_put(x25->neighbour); | |
829 | out_put_route: | |
830 | x25_route_put(rt); | |
831 | out: | |
832 | release_sock(sk); | |
91774904 | 833 | unlock_kernel(); |
1da177e4 LT |
834 | return rc; |
835 | } | |
836 | ||
bac37ec8 | 837 | static int x25_wait_for_data(struct sock *sk, long timeout) |
1da177e4 LT |
838 | { |
839 | DECLARE_WAITQUEUE(wait, current); | |
840 | int rc = 0; | |
841 | ||
842 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
843 | for (;;) { | |
844 | __set_current_state(TASK_INTERRUPTIBLE); | |
845 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
846 | break; | |
847 | rc = -ERESTARTSYS; | |
848 | if (signal_pending(current)) | |
849 | break; | |
850 | rc = -EAGAIN; | |
851 | if (!timeout) | |
852 | break; | |
853 | rc = 0; | |
854 | if (skb_queue_empty(&sk->sk_receive_queue)) { | |
855 | release_sock(sk); | |
856 | timeout = schedule_timeout(timeout); | |
857 | lock_sock(sk); | |
858 | } else | |
859 | break; | |
860 | } | |
861 | __set_current_state(TASK_RUNNING); | |
862 | remove_wait_queue(sk->sk_sleep, &wait); | |
863 | return rc; | |
864 | } | |
f8e1d201 | 865 | |
1da177e4 LT |
866 | static int x25_accept(struct socket *sock, struct socket *newsock, int flags) |
867 | { | |
868 | struct sock *sk = sock->sk; | |
869 | struct sock *newsk; | |
870 | struct sk_buff *skb; | |
871 | int rc = -EINVAL; | |
872 | ||
91774904 | 873 | lock_kernel(); |
1da177e4 LT |
874 | if (!sk || sk->sk_state != TCP_LISTEN) |
875 | goto out; | |
876 | ||
877 | rc = -EOPNOTSUPP; | |
878 | if (sk->sk_type != SOCK_SEQPACKET) | |
879 | goto out; | |
880 | ||
881 | lock_sock(sk); | |
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: | |
91774904 | 901 | unlock_kernel(); |
1da177e4 LT |
902 | return rc; |
903 | } | |
904 | ||
905 | static int x25_getname(struct socket *sock, struct sockaddr *uaddr, | |
906 | int *uaddr_len, int peer) | |
907 | { | |
908 | struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)uaddr; | |
909 | struct sock *sk = sock->sk; | |
910 | struct x25_sock *x25 = x25_sk(sk); | |
91774904 | 911 | int rc = 0; |
1da177e4 | 912 | |
91774904 | 913 | lock_kernel(); |
1da177e4 | 914 | if (peer) { |
91774904 AB |
915 | if (sk->sk_state != TCP_ESTABLISHED) { |
916 | rc = -ENOTCONN; | |
917 | goto out; | |
918 | } | |
1da177e4 LT |
919 | sx25->sx25_addr = x25->dest_addr; |
920 | } else | |
921 | sx25->sx25_addr = x25->source_addr; | |
922 | ||
923 | sx25->sx25_family = AF_X25; | |
924 | *uaddr_len = sizeof(*sx25); | |
925 | ||
91774904 AB |
926 | out: |
927 | unlock_kernel(); | |
928 | return rc; | |
929 | } | |
930 | ||
931 | static unsigned int x25_datagram_poll(struct file *file, struct socket *sock, | |
932 | poll_table *wait) | |
933 | { | |
934 | int rc; | |
935 | ||
936 | lock_kernel(); | |
937 | rc = datagram_poll(file, sock, wait); | |
938 | unlock_kernel(); | |
939 | ||
940 | return rc; | |
1da177e4 | 941 | } |
f8e1d201 | 942 | |
1da177e4 LT |
943 | int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *nb, |
944 | unsigned int lci) | |
945 | { | |
946 | struct sock *sk; | |
947 | struct sock *make; | |
948 | struct x25_sock *makex25; | |
949 | struct x25_address source_addr, dest_addr; | |
950 | struct x25_facilities facilities; | |
a64b7b93 | 951 | struct x25_dte_facilities dte_facilities; |
95a9dc43 | 952 | int len, addr_len, rc; |
1da177e4 LT |
953 | |
954 | /* | |
955 | * Remove the LCI and frame type. | |
956 | */ | |
957 | skb_pull(skb, X25_STD_MIN_LEN); | |
958 | ||
959 | /* | |
960 | * Extract the X.25 addresses and convert them to ASCII strings, | |
961 | * and remove them. | |
f5eb917b JH |
962 | * |
963 | * Address block is mandatory in call request packets | |
1da177e4 | 964 | */ |
f5eb917b JH |
965 | addr_len = x25_parse_address_block(skb, &source_addr, &dest_addr); |
966 | if (addr_len <= 0) | |
967 | goto out_clear_request; | |
95a9dc43 | 968 | skb_pull(skb, addr_len); |
1da177e4 LT |
969 | |
970 | /* | |
971 | * Get the length of the facilities, skip past them for the moment | |
972 | * get the call user data because this is needed to determine | |
973 | * the correct listener | |
f5eb917b JH |
974 | * |
975 | * Facilities length is mandatory in call request packets | |
1da177e4 | 976 | */ |
f5eb917b JH |
977 | if (skb->len < 1) |
978 | goto out_clear_request; | |
1da177e4 | 979 | len = skb->data[0] + 1; |
f5eb917b JH |
980 | if (skb->len < len) |
981 | goto out_clear_request; | |
1da177e4 LT |
982 | skb_pull(skb,len); |
983 | ||
1da177e4 LT |
984 | /* |
985 | * Find a listener for the particular address/cud pair. | |
986 | */ | |
cb65d506 SP |
987 | sk = x25_find_listener(&source_addr,skb); |
988 | skb_push(skb,len); | |
1da177e4 | 989 | |
95a9dc43 AH |
990 | if (sk != NULL && sk_acceptq_is_full(sk)) { |
991 | goto out_sock_put; | |
992 | } | |
993 | ||
1da177e4 | 994 | /* |
95a9dc43 AH |
995 | * We dont have any listeners for this incoming call. |
996 | * Try forwarding it. | |
1da177e4 | 997 | */ |
95a9dc43 AH |
998 | if (sk == NULL) { |
999 | skb_push(skb, addr_len + X25_STD_MIN_LEN); | |
39e21c0d AH |
1000 | if (sysctl_x25_forward && |
1001 | x25_forward_call(&dest_addr, nb, skb, lci) > 0) | |
95a9dc43 AH |
1002 | { |
1003 | /* Call was forwarded, dont process it any more */ | |
1004 | kfree_skb(skb); | |
1005 | rc = 1; | |
1006 | goto out; | |
1007 | } else { | |
1008 | /* No listeners, can't forward, clear the call */ | |
1009 | goto out_clear_request; | |
1010 | } | |
1011 | } | |
1da177e4 LT |
1012 | |
1013 | /* | |
1014 | * Try to reach a compromise on the requested facilities. | |
1015 | */ | |
a64b7b93 SP |
1016 | len = x25_negotiate_facilities(skb, sk, &facilities, &dte_facilities); |
1017 | if (len == -1) | |
1da177e4 LT |
1018 | goto out_sock_put; |
1019 | ||
1020 | /* | |
1021 | * current neighbour/link might impose additional limits | |
1022 | * on certain facilties | |
1023 | */ | |
1024 | ||
1025 | x25_limit_facilities(&facilities, nb); | |
1026 | ||
1027 | /* | |
1028 | * Try to create a new socket. | |
1029 | */ | |
1030 | make = x25_make_new(sk); | |
1031 | if (!make) | |
1032 | goto out_sock_put; | |
1033 | ||
1034 | /* | |
1035 | * Remove the facilities | |
1036 | */ | |
1037 | skb_pull(skb, len); | |
1038 | ||
1039 | skb->sk = make; | |
1040 | make->sk_state = TCP_ESTABLISHED; | |
1041 | ||
1042 | makex25 = x25_sk(make); | |
1043 | makex25->lci = lci; | |
1044 | makex25->dest_addr = dest_addr; | |
1045 | makex25->source_addr = source_addr; | |
1046 | makex25->neighbour = nb; | |
1047 | makex25->facilities = facilities; | |
a64b7b93 | 1048 | makex25->dte_facilities= dte_facilities; |
1da177e4 | 1049 | makex25->vc_facil_mask = x25_sk(sk)->vc_facil_mask; |
cb65d506 SP |
1050 | /* ensure no reverse facil on accept */ |
1051 | makex25->vc_facil_mask &= ~X25_MASK_REVERSE; | |
a64b7b93 SP |
1052 | /* ensure no calling address extension on accept */ |
1053 | makex25->vc_facil_mask &= ~X25_MASK_CALLING_AE; | |
cb65d506 | 1054 | makex25->cudmatchlength = x25_sk(sk)->cudmatchlength; |
1da177e4 | 1055 | |
ebc3f64b SP |
1056 | /* Normally all calls are accepted immediatly */ |
1057 | if(makex25->accptapprv & X25_DENY_ACCPT_APPRV) { | |
1058 | x25_write_internal(make, X25_CALL_ACCEPTED); | |
1059 | makex25->state = X25_STATE_3; | |
1060 | } | |
1da177e4 | 1061 | |
cb65d506 SP |
1062 | /* |
1063 | * Incoming Call User Data. | |
1064 | */ | |
8db09f26 RK |
1065 | skb_copy_from_linear_data(skb, makex25->calluserdata.cuddata, skb->len); |
1066 | makex25->calluserdata.cudlength = skb->len; | |
cb65d506 | 1067 | |
1da177e4 LT |
1068 | sk->sk_ack_backlog++; |
1069 | ||
1070 | x25_insert_socket(make); | |
1071 | ||
1072 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1073 | ||
1074 | x25_start_heartbeat(make); | |
1075 | ||
1076 | if (!sock_flag(sk, SOCK_DEAD)) | |
1077 | sk->sk_data_ready(sk, skb->len); | |
1078 | rc = 1; | |
1079 | sock_put(sk); | |
1080 | out: | |
1081 | return rc; | |
1082 | out_sock_put: | |
1083 | sock_put(sk); | |
1084 | out_clear_request: | |
1085 | rc = 0; | |
1086 | x25_transmit_clear_request(nb, lci, 0x01); | |
1087 | goto out; | |
1088 | } | |
1089 | ||
1090 | static int x25_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1091 | struct msghdr *msg, size_t len) | |
1092 | { | |
1093 | struct sock *sk = sock->sk; | |
1094 | struct x25_sock *x25 = x25_sk(sk); | |
1095 | struct sockaddr_x25 *usx25 = (struct sockaddr_x25 *)msg->msg_name; | |
1096 | struct sockaddr_x25 sx25; | |
1097 | struct sk_buff *skb; | |
1098 | unsigned char *asmptr; | |
1099 | int noblock = msg->msg_flags & MSG_DONTWAIT; | |
1100 | size_t size; | |
1101 | int qbit = 0, rc = -EINVAL; | |
1102 | ||
91774904 | 1103 | lock_kernel(); |
1da177e4 LT |
1104 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_OOB|MSG_EOR|MSG_CMSG_COMPAT)) |
1105 | goto out; | |
1106 | ||
1107 | /* we currently don't support segmented records at the user interface */ | |
1108 | if (!(msg->msg_flags & (MSG_EOR|MSG_OOB))) | |
1109 | goto out; | |
1110 | ||
1111 | rc = -EADDRNOTAVAIL; | |
1112 | if (sock_flag(sk, SOCK_ZAPPED)) | |
1113 | goto out; | |
1114 | ||
1115 | rc = -EPIPE; | |
1116 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1117 | send_sig(SIGPIPE, current, 0); | |
1118 | goto out; | |
1119 | } | |
1120 | ||
1121 | rc = -ENETUNREACH; | |
1122 | if (!x25->neighbour) | |
1123 | goto out; | |
1124 | ||
1125 | if (usx25) { | |
1126 | rc = -EINVAL; | |
1127 | if (msg->msg_namelen < sizeof(sx25)) | |
1128 | goto out; | |
1129 | memcpy(&sx25, usx25, sizeof(sx25)); | |
1130 | rc = -EISCONN; | |
1131 | if (strcmp(x25->dest_addr.x25_addr, sx25.sx25_addr.x25_addr)) | |
1132 | goto out; | |
1133 | rc = -EINVAL; | |
1134 | if (sx25.sx25_family != AF_X25) | |
1135 | goto out; | |
1136 | } else { | |
1137 | /* | |
1138 | * FIXME 1003.1g - if the socket is like this because | |
1139 | * it has become closed (not started closed) we ought | |
1140 | * to SIGPIPE, EPIPE; | |
1141 | */ | |
1142 | rc = -ENOTCONN; | |
1143 | if (sk->sk_state != TCP_ESTABLISHED) | |
1144 | goto out; | |
1145 | ||
1146 | sx25.sx25_family = AF_X25; | |
1147 | sx25.sx25_addr = x25->dest_addr; | |
1148 | } | |
1149 | ||
83e0bbcb AC |
1150 | /* Sanity check the packet size */ |
1151 | if (len > 65535) { | |
1152 | rc = -EMSGSIZE; | |
1153 | goto out; | |
1154 | } | |
1155 | ||
1da177e4 LT |
1156 | SOCK_DEBUG(sk, "x25_sendmsg: sendto: Addresses built.\n"); |
1157 | ||
1158 | /* Build a packet */ | |
1159 | SOCK_DEBUG(sk, "x25_sendmsg: sendto: building packet.\n"); | |
1160 | ||
1161 | if ((msg->msg_flags & MSG_OOB) && len > 32) | |
1162 | len = 32; | |
1163 | ||
1164 | size = len + X25_MAX_L2_LEN + X25_EXT_MIN_LEN; | |
1165 | ||
1166 | skb = sock_alloc_send_skb(sk, size, noblock, &rc); | |
1167 | if (!skb) | |
1168 | goto out; | |
1169 | X25_SKB_CB(skb)->flags = msg->msg_flags; | |
1170 | ||
1171 | skb_reserve(skb, X25_MAX_L2_LEN + X25_EXT_MIN_LEN); | |
1172 | ||
1173 | /* | |
1174 | * Put the data on the end | |
1175 | */ | |
1176 | SOCK_DEBUG(sk, "x25_sendmsg: Copying user data\n"); | |
1177 | ||
eeeb0374 ACM |
1178 | skb_reset_transport_header(skb); |
1179 | skb_put(skb, len); | |
1da177e4 | 1180 | |
eeeb0374 | 1181 | rc = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len); |
1da177e4 LT |
1182 | if (rc) |
1183 | goto out_kfree_skb; | |
1184 | ||
1185 | /* | |
1186 | * If the Q BIT Include socket option is in force, the first | |
1187 | * byte of the user data is the logical value of the Q Bit. | |
1188 | */ | |
1189 | if (x25->qbitincl) { | |
1190 | qbit = skb->data[0]; | |
1191 | skb_pull(skb, 1); | |
1192 | } | |
1193 | ||
1194 | /* | |
1195 | * Push down the X.25 header | |
1196 | */ | |
1197 | SOCK_DEBUG(sk, "x25_sendmsg: Building X.25 Header.\n"); | |
1198 | ||
1199 | if (msg->msg_flags & MSG_OOB) { | |
1200 | if (x25->neighbour->extended) { | |
1201 | asmptr = skb_push(skb, X25_STD_MIN_LEN); | |
1202 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ; | |
1203 | *asmptr++ = (x25->lci >> 0) & 0xFF; | |
1204 | *asmptr++ = X25_INTERRUPT; | |
1205 | } else { | |
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_INTERRUPT; | |
1210 | } | |
1211 | } else { | |
1212 | if (x25->neighbour->extended) { | |
1213 | /* Build an Extended X.25 header */ | |
1214 | asmptr = skb_push(skb, X25_EXT_MIN_LEN); | |
1215 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ; | |
1216 | *asmptr++ = (x25->lci >> 0) & 0xFF; | |
1217 | *asmptr++ = X25_DATA; | |
1218 | *asmptr++ = X25_DATA; | |
1219 | } else { | |
1220 | /* Build an Standard X.25 header */ | |
1221 | asmptr = skb_push(skb, X25_STD_MIN_LEN); | |
1222 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ; | |
1223 | *asmptr++ = (x25->lci >> 0) & 0xFF; | |
1224 | *asmptr++ = X25_DATA; | |
1225 | } | |
1226 | ||
1227 | if (qbit) | |
1228 | skb->data[0] |= X25_Q_BIT; | |
1229 | } | |
1230 | ||
1231 | SOCK_DEBUG(sk, "x25_sendmsg: Built header.\n"); | |
1232 | SOCK_DEBUG(sk, "x25_sendmsg: Transmitting buffer\n"); | |
1233 | ||
1234 | rc = -ENOTCONN; | |
1235 | if (sk->sk_state != TCP_ESTABLISHED) | |
1236 | goto out_kfree_skb; | |
1237 | ||
1238 | if (msg->msg_flags & MSG_OOB) | |
1239 | skb_queue_tail(&x25->interrupt_out_queue, skb); | |
1240 | else { | |
8db09f26 RK |
1241 | rc = x25_output(sk, skb); |
1242 | len = rc; | |
1243 | if (rc < 0) | |
1da177e4 LT |
1244 | kfree_skb(skb); |
1245 | else if (x25->qbitincl) | |
1246 | len++; | |
1247 | } | |
1248 | ||
1249 | /* | |
1250 | * lock_sock() is currently only used to serialize this x25_kick() | |
1251 | * against input-driven x25_kick() calls. It currently only blocks | |
1252 | * incoming packets for this socket and does not protect against | |
1253 | * any other socket state changes and is not called from anywhere | |
1254 | * else. As x25_kick() cannot block and as long as all socket | |
1255 | * operations are BKL-wrapped, we don't need take to care about | |
1256 | * purging the backlog queue in x25_release(). | |
1257 | * | |
1258 | * Using lock_sock() to protect all socket operations entirely | |
1259 | * (and making the whole x25 stack SMP aware) unfortunately would | |
1260 | * require major changes to {send,recv}msg and skb allocation methods. | |
1261 | * -> 2.5 ;) | |
1262 | */ | |
1263 | lock_sock(sk); | |
1264 | x25_kick(sk); | |
1265 | release_sock(sk); | |
1266 | rc = len; | |
1267 | out: | |
91774904 | 1268 | unlock_kernel(); |
1da177e4 LT |
1269 | return rc; |
1270 | out_kfree_skb: | |
1271 | kfree_skb(skb); | |
1272 | goto out; | |
1273 | } | |
1274 | ||
1275 | ||
1276 | static int x25_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1277 | struct msghdr *msg, size_t size, | |
1278 | int flags) | |
1279 | { | |
1280 | struct sock *sk = sock->sk; | |
1281 | struct x25_sock *x25 = x25_sk(sk); | |
1282 | struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name; | |
1283 | size_t copied; | |
1284 | int qbit; | |
1285 | struct sk_buff *skb; | |
1286 | unsigned char *asmptr; | |
1287 | int rc = -ENOTCONN; | |
1288 | ||
91774904 | 1289 | lock_kernel(); |
1da177e4 LT |
1290 | /* |
1291 | * This works for seqpacket too. The receiver has ordered the queue for | |
1292 | * us! We do one quick check first though | |
1293 | */ | |
1294 | if (sk->sk_state != TCP_ESTABLISHED) | |
1295 | goto out; | |
1296 | ||
1297 | if (flags & MSG_OOB) { | |
1298 | rc = -EINVAL; | |
1299 | if (sock_flag(sk, SOCK_URGINLINE) || | |
1300 | !skb_peek(&x25->interrupt_in_queue)) | |
1301 | goto out; | |
1302 | ||
1303 | skb = skb_dequeue(&x25->interrupt_in_queue); | |
1304 | ||
1305 | skb_pull(skb, X25_STD_MIN_LEN); | |
1306 | ||
1307 | /* | |
1308 | * No Q bit information on Interrupt data. | |
1309 | */ | |
1310 | if (x25->qbitincl) { | |
1311 | asmptr = skb_push(skb, 1); | |
1312 | *asmptr = 0x00; | |
1313 | } | |
1314 | ||
1315 | msg->msg_flags |= MSG_OOB; | |
1316 | } else { | |
1317 | /* Now we can treat all alike */ | |
1318 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, | |
1319 | flags & MSG_DONTWAIT, &rc); | |
1320 | if (!skb) | |
1321 | goto out; | |
1322 | ||
1323 | qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT; | |
1324 | ||
1325 | skb_pull(skb, x25->neighbour->extended ? | |
1326 | X25_EXT_MIN_LEN : X25_STD_MIN_LEN); | |
1327 | ||
1328 | if (x25->qbitincl) { | |
1329 | asmptr = skb_push(skb, 1); | |
1330 | *asmptr = qbit; | |
1331 | } | |
1332 | } | |
1333 | ||
badff6d0 | 1334 | skb_reset_transport_header(skb); |
1da177e4 LT |
1335 | copied = skb->len; |
1336 | ||
1337 | if (copied > size) { | |
1338 | copied = size; | |
1339 | msg->msg_flags |= MSG_TRUNC; | |
1340 | } | |
1341 | ||
f8e1d201 | 1342 | /* Currently, each datagram always contains a complete record */ |
1da177e4 LT |
1343 | msg->msg_flags |= MSG_EOR; |
1344 | ||
1345 | rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
1346 | if (rc) | |
1347 | goto out_free_dgram; | |
1348 | ||
1349 | if (sx25) { | |
1350 | sx25->sx25_family = AF_X25; | |
1351 | sx25->sx25_addr = x25->dest_addr; | |
1352 | } | |
1353 | ||
1354 | msg->msg_namelen = sizeof(struct sockaddr_x25); | |
1355 | ||
1356 | lock_sock(sk); | |
1357 | x25_check_rbuf(sk); | |
1358 | release_sock(sk); | |
1359 | rc = copied; | |
1360 | out_free_dgram: | |
1361 | skb_free_datagram(sk, skb); | |
1362 | out: | |
91774904 | 1363 | unlock_kernel(); |
1da177e4 LT |
1364 | return rc; |
1365 | } | |
1366 | ||
1367 | ||
1368 | static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1369 | { | |
1370 | struct sock *sk = sock->sk; | |
1371 | struct x25_sock *x25 = x25_sk(sk); | |
1372 | void __user *argp = (void __user *)arg; | |
1373 | int rc; | |
1374 | ||
91774904 | 1375 | lock_kernel(); |
1da177e4 LT |
1376 | switch (cmd) { |
1377 | case TIOCOUTQ: { | |
31e6d363 ED |
1378 | int amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
1379 | ||
1da177e4 LT |
1380 | if (amount < 0) |
1381 | amount = 0; | |
1382 | rc = put_user(amount, (unsigned int __user *)argp); | |
1383 | break; | |
1384 | } | |
1385 | ||
1386 | case TIOCINQ: { | |
1387 | struct sk_buff *skb; | |
1388 | int amount = 0; | |
1389 | /* | |
1390 | * These two are safe on a single CPU system as | |
1391 | * only user tasks fiddle here | |
1392 | */ | |
1393 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) | |
1394 | amount = skb->len; | |
1395 | rc = put_user(amount, (unsigned int __user *)argp); | |
1396 | break; | |
1397 | } | |
1398 | ||
1399 | case SIOCGSTAMP: | |
1400 | rc = -EINVAL; | |
1401 | if (sk) | |
f8e1d201 YH |
1402 | rc = sock_get_timestamp(sk, |
1403 | (struct timeval __user *)argp); | |
1da177e4 | 1404 | break; |
ae40eb1e ED |
1405 | case SIOCGSTAMPNS: |
1406 | rc = -EINVAL; | |
1407 | if (sk) | |
1408 | rc = sock_get_timestampns(sk, | |
1409 | (struct timespec __user *)argp); | |
1410 | break; | |
1da177e4 LT |
1411 | case SIOCGIFADDR: |
1412 | case SIOCSIFADDR: | |
1413 | case SIOCGIFDSTADDR: | |
1414 | case SIOCSIFDSTADDR: | |
1415 | case SIOCGIFBRDADDR: | |
1416 | case SIOCSIFBRDADDR: | |
1417 | case SIOCGIFNETMASK: | |
1418 | case SIOCSIFNETMASK: | |
1419 | case SIOCGIFMETRIC: | |
1420 | case SIOCSIFMETRIC: | |
1421 | rc = -EINVAL; | |
1422 | break; | |
1423 | case SIOCADDRT: | |
1424 | case SIOCDELRT: | |
1425 | rc = -EPERM; | |
1426 | if (!capable(CAP_NET_ADMIN)) | |
1427 | break; | |
1428 | rc = x25_route_ioctl(cmd, argp); | |
1429 | break; | |
1430 | case SIOCX25GSUBSCRIP: | |
1431 | rc = x25_subscr_ioctl(cmd, argp); | |
1432 | break; | |
1433 | case SIOCX25SSUBSCRIP: | |
1434 | rc = -EPERM; | |
1435 | if (!capable(CAP_NET_ADMIN)) | |
1436 | break; | |
1437 | rc = x25_subscr_ioctl(cmd, argp); | |
1438 | break; | |
1439 | case SIOCX25GFACILITIES: { | |
1440 | struct x25_facilities fac = x25->facilities; | |
1441 | rc = copy_to_user(argp, &fac, | |
1442 | sizeof(fac)) ? -EFAULT : 0; | |
1443 | break; | |
1444 | } | |
1445 | ||
1446 | case SIOCX25SFACILITIES: { | |
1447 | struct x25_facilities facilities; | |
1448 | rc = -EFAULT; | |
1449 | if (copy_from_user(&facilities, argp, | |
1450 | sizeof(facilities))) | |
1451 | break; | |
1452 | rc = -EINVAL; | |
1453 | if (sk->sk_state != TCP_LISTEN && | |
1454 | sk->sk_state != TCP_CLOSE) | |
1455 | break; | |
1456 | if (facilities.pacsize_in < X25_PS16 || | |
1457 | facilities.pacsize_in > X25_PS4096) | |
1458 | break; | |
1459 | if (facilities.pacsize_out < X25_PS16 || | |
1460 | facilities.pacsize_out > X25_PS4096) | |
1461 | break; | |
1462 | if (facilities.winsize_in < 1 || | |
1463 | facilities.winsize_in > 127) | |
1464 | break; | |
ddd0451f JH |
1465 | if (facilities.throughput) { |
1466 | int out = facilities.throughput & 0xf0; | |
1467 | int in = facilities.throughput & 0x0f; | |
1468 | if (!out) | |
1469 | facilities.throughput |= | |
1470 | X25_DEFAULT_THROUGHPUT << 4; | |
1471 | else if (out < 0x30 || out > 0xD0) | |
1472 | break; | |
1473 | if (!in) | |
1474 | facilities.throughput |= | |
1475 | X25_DEFAULT_THROUGHPUT; | |
1476 | else if (in < 0x03 || in > 0x0D) | |
1477 | break; | |
1478 | } | |
ebc3f64b | 1479 | if (facilities.reverse && |
06a96b33 | 1480 | (facilities.reverse & 0x81) != 0x81) |
1da177e4 LT |
1481 | break; |
1482 | x25->facilities = facilities; | |
1483 | rc = 0; | |
1484 | break; | |
1485 | } | |
1486 | ||
a64b7b93 | 1487 | case SIOCX25GDTEFACILITIES: { |
f8e1d201 | 1488 | rc = copy_to_user(argp, &x25->dte_facilities, |
a64b7b93 SP |
1489 | sizeof(x25->dte_facilities)); |
1490 | if (rc) | |
1491 | rc = -EFAULT; | |
f8e1d201 YH |
1492 | break; |
1493 | } | |
a64b7b93 | 1494 | |
f8e1d201 YH |
1495 | case SIOCX25SDTEFACILITIES: { |
1496 | struct x25_dte_facilities dtefacs; | |
1497 | rc = -EFAULT; | |
1498 | if (copy_from_user(&dtefacs, argp, sizeof(dtefacs))) | |
a64b7b93 SP |
1499 | break; |
1500 | rc = -EINVAL; | |
1501 | if (sk->sk_state != TCP_LISTEN && | |
1502 | sk->sk_state != TCP_CLOSE) | |
1503 | break; | |
1504 | if (dtefacs.calling_len > X25_MAX_AE_LEN) | |
1505 | break; | |
1506 | if (dtefacs.calling_ae == NULL) | |
1507 | break; | |
1508 | if (dtefacs.called_len > X25_MAX_AE_LEN) | |
1509 | break; | |
1510 | if (dtefacs.called_ae == NULL) | |
1511 | break; | |
1512 | x25->dte_facilities = dtefacs; | |
1513 | rc = 0; | |
1514 | break; | |
1515 | } | |
1516 | ||
1da177e4 LT |
1517 | case SIOCX25GCALLUSERDATA: { |
1518 | struct x25_calluserdata cud = x25->calluserdata; | |
1519 | rc = copy_to_user(argp, &cud, | |
1520 | sizeof(cud)) ? -EFAULT : 0; | |
1521 | break; | |
1522 | } | |
1523 | ||
1524 | case SIOCX25SCALLUSERDATA: { | |
1525 | struct x25_calluserdata calluserdata; | |
1526 | ||
1527 | rc = -EFAULT; | |
1528 | if (copy_from_user(&calluserdata, argp, | |
1529 | sizeof(calluserdata))) | |
1530 | break; | |
1531 | rc = -EINVAL; | |
1532 | if (calluserdata.cudlength > X25_MAX_CUD_LEN) | |
1533 | break; | |
1534 | x25->calluserdata = calluserdata; | |
1535 | rc = 0; | |
1536 | break; | |
1537 | } | |
1538 | ||
1539 | case SIOCX25GCAUSEDIAG: { | |
1540 | struct x25_causediag causediag; | |
1541 | causediag = x25->causediag; | |
1542 | rc = copy_to_user(argp, &causediag, | |
1543 | sizeof(causediag)) ? -EFAULT : 0; | |
1544 | break; | |
1545 | } | |
1546 | ||
386e50cc AH |
1547 | case SIOCX25SCAUSEDIAG: { |
1548 | struct x25_causediag causediag; | |
1549 | rc = -EFAULT; | |
1550 | if (copy_from_user(&causediag, argp, sizeof(causediag))) | |
1551 | break; | |
1552 | x25->causediag = causediag; | |
1553 | rc = 0; | |
1554 | break; | |
1555 | ||
1556 | } | |
1557 | ||
cb65d506 SP |
1558 | case SIOCX25SCUDMATCHLEN: { |
1559 | struct x25_subaddr sub_addr; | |
1560 | rc = -EINVAL; | |
1561 | if(sk->sk_state != TCP_CLOSE) | |
1562 | break; | |
1563 | rc = -EFAULT; | |
1564 | if (copy_from_user(&sub_addr, argp, | |
1565 | sizeof(sub_addr))) | |
1566 | break; | |
f8e1d201 | 1567 | rc = -EINVAL; |
cb65d506 SP |
1568 | if(sub_addr.cudmatchlength > X25_MAX_CUD_LEN) |
1569 | break; | |
1570 | x25->cudmatchlength = sub_addr.cudmatchlength; | |
1571 | rc = 0; | |
1572 | break; | |
1573 | } | |
1574 | ||
ebc3f64b SP |
1575 | case SIOCX25CALLACCPTAPPRV: { |
1576 | rc = -EINVAL; | |
1577 | if (sk->sk_state != TCP_CLOSE) | |
1578 | break; | |
1579 | x25->accptapprv = X25_ALLOW_ACCPT_APPRV; | |
1580 | rc = 0; | |
1581 | break; | |
1582 | } | |
1583 | ||
1584 | case SIOCX25SENDCALLACCPT: { | |
1585 | rc = -EINVAL; | |
1586 | if (sk->sk_state != TCP_ESTABLISHED) | |
1587 | break; | |
1588 | if (x25->accptapprv) /* must call accptapprv above */ | |
1589 | break; | |
1590 | x25_write_internal(sk, X25_CALL_ACCEPTED); | |
1591 | x25->state = X25_STATE_3; | |
1592 | rc = 0; | |
1593 | break; | |
1594 | } | |
1595 | ||
f8e1d201 | 1596 | default: |
b5e5fa5e | 1597 | rc = -ENOIOCTLCMD; |
1da177e4 LT |
1598 | break; |
1599 | } | |
91774904 | 1600 | unlock_kernel(); |
1da177e4 LT |
1601 | |
1602 | return rc; | |
1603 | } | |
1604 | ||
ec1b4cf7 | 1605 | static const struct net_proto_family x25_family_ops = { |
1da177e4 LT |
1606 | .family = AF_X25, |
1607 | .create = x25_create, | |
1608 | .owner = THIS_MODULE, | |
1609 | }; | |
1610 | ||
1b06e6ba SP |
1611 | #ifdef CONFIG_COMPAT |
1612 | static int compat_x25_subscr_ioctl(unsigned int cmd, | |
1613 | struct compat_x25_subscrip_struct __user *x25_subscr32) | |
1614 | { | |
1615 | struct compat_x25_subscrip_struct x25_subscr; | |
1616 | struct x25_neigh *nb; | |
1617 | struct net_device *dev; | |
1618 | int rc = -EINVAL; | |
1619 | ||
1620 | rc = -EFAULT; | |
1621 | if (copy_from_user(&x25_subscr, x25_subscr32, sizeof(*x25_subscr32))) | |
1622 | goto out; | |
1623 | ||
1624 | rc = -EINVAL; | |
1625 | dev = x25_dev_get(x25_subscr.device); | |
1626 | if (dev == NULL) | |
1627 | goto out; | |
1628 | ||
1629 | nb = x25_get_neigh(dev); | |
1630 | if (nb == NULL) | |
1631 | goto out_dev_put; | |
1632 | ||
1633 | dev_put(dev); | |
1634 | ||
1635 | if (cmd == SIOCX25GSUBSCRIP) { | |
1636 | x25_subscr.extended = nb->extended; | |
1637 | x25_subscr.global_facil_mask = nb->global_facil_mask; | |
1638 | rc = copy_to_user(x25_subscr32, &x25_subscr, | |
1639 | sizeof(*x25_subscr32)) ? -EFAULT : 0; | |
1640 | } else { | |
1641 | rc = -EINVAL; | |
1642 | if (x25_subscr.extended == 0 || x25_subscr.extended == 1) { | |
1643 | rc = 0; | |
1644 | nb->extended = x25_subscr.extended; | |
1645 | nb->global_facil_mask = x25_subscr.global_facil_mask; | |
1646 | } | |
1647 | } | |
1648 | x25_neigh_put(nb); | |
1649 | out: | |
1650 | return rc; | |
1651 | out_dev_put: | |
1652 | dev_put(dev); | |
1653 | goto out; | |
1654 | } | |
1655 | ||
1656 | static int compat_x25_ioctl(struct socket *sock, unsigned int cmd, | |
1657 | unsigned long arg) | |
1658 | { | |
1659 | void __user *argp = compat_ptr(arg); | |
1660 | struct sock *sk = sock->sk; | |
1661 | ||
1662 | int rc = -ENOIOCTLCMD; | |
1663 | ||
1664 | switch(cmd) { | |
1665 | case TIOCOUTQ: | |
1666 | case TIOCINQ: | |
1667 | rc = x25_ioctl(sock, cmd, (unsigned long)argp); | |
1668 | break; | |
1669 | case SIOCGSTAMP: | |
1670 | rc = -EINVAL; | |
91774904 | 1671 | lock_kernel(); |
1b06e6ba SP |
1672 | if (sk) |
1673 | rc = compat_sock_get_timestamp(sk, | |
1674 | (struct timeval __user*)argp); | |
91774904 | 1675 | unlock_kernel(); |
1b06e6ba | 1676 | break; |
ae40eb1e ED |
1677 | case SIOCGSTAMPNS: |
1678 | rc = -EINVAL; | |
91774904 | 1679 | lock_kernel(); |
ae40eb1e ED |
1680 | if (sk) |
1681 | rc = compat_sock_get_timestampns(sk, | |
1682 | (struct timespec __user*)argp); | |
91774904 | 1683 | unlock_kernel(); |
ae40eb1e | 1684 | break; |
1b06e6ba SP |
1685 | case SIOCGIFADDR: |
1686 | case SIOCSIFADDR: | |
1687 | case SIOCGIFDSTADDR: | |
1688 | case SIOCSIFDSTADDR: | |
1689 | case SIOCGIFBRDADDR: | |
1690 | case SIOCSIFBRDADDR: | |
1691 | case SIOCGIFNETMASK: | |
1692 | case SIOCSIFNETMASK: | |
1693 | case SIOCGIFMETRIC: | |
1694 | case SIOCSIFMETRIC: | |
1695 | rc = -EINVAL; | |
1696 | break; | |
1697 | case SIOCADDRT: | |
1698 | case SIOCDELRT: | |
1699 | rc = -EPERM; | |
1700 | if (!capable(CAP_NET_ADMIN)) | |
1701 | break; | |
91774904 | 1702 | lock_kernel(); |
1b06e6ba | 1703 | rc = x25_route_ioctl(cmd, argp); |
91774904 | 1704 | unlock_kernel(); |
1b06e6ba SP |
1705 | break; |
1706 | case SIOCX25GSUBSCRIP: | |
91774904 | 1707 | lock_kernel(); |
1b06e6ba | 1708 | rc = compat_x25_subscr_ioctl(cmd, argp); |
91774904 | 1709 | unlock_kernel(); |
1b06e6ba SP |
1710 | break; |
1711 | case SIOCX25SSUBSCRIP: | |
1712 | rc = -EPERM; | |
1713 | if (!capable(CAP_NET_ADMIN)) | |
1714 | break; | |
91774904 | 1715 | lock_kernel(); |
1b06e6ba | 1716 | rc = compat_x25_subscr_ioctl(cmd, argp); |
91774904 | 1717 | unlock_kernel(); |
1b06e6ba SP |
1718 | break; |
1719 | case SIOCX25GFACILITIES: | |
1720 | case SIOCX25SFACILITIES: | |
9a6b9f2e SP |
1721 | case SIOCX25GDTEFACILITIES: |
1722 | case SIOCX25SDTEFACILITIES: | |
1b06e6ba SP |
1723 | case SIOCX25GCALLUSERDATA: |
1724 | case SIOCX25SCALLUSERDATA: | |
1725 | case SIOCX25GCAUSEDIAG: | |
386e50cc | 1726 | case SIOCX25SCAUSEDIAG: |
1b06e6ba SP |
1727 | case SIOCX25SCUDMATCHLEN: |
1728 | case SIOCX25CALLACCPTAPPRV: | |
1729 | case SIOCX25SENDCALLACCPT: | |
1730 | rc = x25_ioctl(sock, cmd, (unsigned long)argp); | |
1731 | break; | |
1732 | default: | |
1733 | rc = -ENOIOCTLCMD; | |
1734 | break; | |
1735 | } | |
1736 | return rc; | |
1737 | } | |
1738 | #endif | |
1739 | ||
91774904 | 1740 | static const struct proto_ops x25_proto_ops = { |
1da177e4 LT |
1741 | .family = AF_X25, |
1742 | .owner = THIS_MODULE, | |
1743 | .release = x25_release, | |
1744 | .bind = x25_bind, | |
1745 | .connect = x25_connect, | |
1746 | .socketpair = sock_no_socketpair, | |
1747 | .accept = x25_accept, | |
1748 | .getname = x25_getname, | |
91774904 | 1749 | .poll = x25_datagram_poll, |
1da177e4 | 1750 | .ioctl = x25_ioctl, |
1b06e6ba SP |
1751 | #ifdef CONFIG_COMPAT |
1752 | .compat_ioctl = compat_x25_ioctl, | |
1753 | #endif | |
1da177e4 LT |
1754 | .listen = x25_listen, |
1755 | .shutdown = sock_no_shutdown, | |
1756 | .setsockopt = x25_setsockopt, | |
1757 | .getsockopt = x25_getsockopt, | |
1758 | .sendmsg = x25_sendmsg, | |
1759 | .recvmsg = x25_recvmsg, | |
1760 | .mmap = sock_no_mmap, | |
1761 | .sendpage = sock_no_sendpage, | |
1762 | }; | |
1763 | ||
7546dd97 | 1764 | static struct packet_type x25_packet_type __read_mostly = { |
09640e63 | 1765 | .type = cpu_to_be16(ETH_P_X25), |
1da177e4 LT |
1766 | .func = x25_lapb_receive_frame, |
1767 | }; | |
1768 | ||
1769 | static struct notifier_block x25_dev_notifier = { | |
1770 | .notifier_call = x25_device_event, | |
1771 | }; | |
1772 | ||
1773 | void x25_kill_by_neigh(struct x25_neigh *nb) | |
1774 | { | |
1775 | struct sock *s; | |
1776 | struct hlist_node *node; | |
1777 | ||
1778 | write_lock_bh(&x25_list_lock); | |
1779 | ||
1780 | sk_for_each(s, node, &x25_list) | |
1781 | if (x25_sk(s)->neighbour == nb) | |
1782 | x25_disconnect(s, ENETUNREACH, 0, 0); | |
1783 | ||
1784 | write_unlock_bh(&x25_list_lock); | |
95a9dc43 AH |
1785 | |
1786 | /* Remove any related forwards */ | |
1787 | x25_clear_forward_by_dev(nb->dev); | |
1da177e4 LT |
1788 | } |
1789 | ||
1790 | static int __init x25_init(void) | |
1791 | { | |
1792 | int rc = proto_register(&x25_proto, 0); | |
1793 | ||
1794 | if (rc != 0) | |
1795 | goto out; | |
1796 | ||
1fd975a0 | 1797 | rc = sock_register(&x25_family_ops); |
1798 | if (rc != 0) | |
1799 | goto out_proto; | |
1da177e4 LT |
1800 | |
1801 | dev_add_pack(&x25_packet_type); | |
1802 | ||
1fd975a0 | 1803 | rc = register_netdevice_notifier(&x25_dev_notifier); |
1804 | if (rc != 0) | |
1805 | goto out_sock; | |
1da177e4 | 1806 | |
a44562e4 | 1807 | printk(KERN_INFO "X.25 for Linux Version 0.2\n"); |
1da177e4 | 1808 | |
1da177e4 | 1809 | x25_register_sysctl(); |
1fd975a0 | 1810 | rc = x25_proc_init(); |
1811 | if (rc != 0) | |
1812 | goto out_dev; | |
1da177e4 LT |
1813 | out: |
1814 | return rc; | |
1fd975a0 | 1815 | out_dev: |
1816 | unregister_netdevice_notifier(&x25_dev_notifier); | |
1817 | out_sock: | |
1818 | sock_unregister(AF_X25); | |
1819 | out_proto: | |
1820 | proto_unregister(&x25_proto); | |
1821 | goto out; | |
1da177e4 LT |
1822 | } |
1823 | module_init(x25_init); | |
1824 | ||
1825 | static void __exit x25_exit(void) | |
1826 | { | |
1827 | x25_proc_exit(); | |
1828 | x25_link_free(); | |
1829 | x25_route_free(); | |
1830 | ||
1da177e4 | 1831 | x25_unregister_sysctl(); |
1da177e4 LT |
1832 | |
1833 | unregister_netdevice_notifier(&x25_dev_notifier); | |
1834 | ||
1835 | dev_remove_pack(&x25_packet_type); | |
1836 | ||
1837 | sock_unregister(AF_X25); | |
1838 | proto_unregister(&x25_proto); | |
1839 | } | |
1840 | module_exit(x25_exit); | |
1841 | ||
1842 | MODULE_AUTHOR("Jonathan Naylor <g4klx@g4klx.demon.co.uk>"); | |
1843 | MODULE_DESCRIPTION("The X.25 Packet Layer network layer protocol"); | |
1844 | MODULE_LICENSE("GPL"); | |
1845 | MODULE_ALIAS_NETPROTO(PF_X25); |