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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> | |
43 | #include <linux/timer.h> | |
44 | #include <linux/string.h> | |
45 | #include <linux/net.h> | |
46 | #include <linux/netdevice.h> | |
47 | #include <linux/if_arp.h> | |
48 | #include <linux/skbuff.h> | |
5a0e3ad6 | 49 | #include <linux/slab.h> |
1da177e4 | 50 | #include <net/sock.h> |
c752f073 | 51 | #include <net/tcp_states.h> |
1da177e4 LT |
52 | #include <asm/uaccess.h> |
53 | #include <linux/fcntl.h> | |
54 | #include <linux/termios.h> /* For TIOCINQ/OUTQ */ | |
55 | #include <linux/notifier.h> | |
56 | #include <linux/init.h> | |
1b06e6ba | 57 | #include <linux/compat.h> |
a9288525 | 58 | #include <linux/ctype.h> |
1b06e6ba | 59 | |
1da177e4 | 60 | #include <net/x25.h> |
1b06e6ba | 61 | #include <net/compat.h> |
1da177e4 LT |
62 | |
63 | int sysctl_x25_restart_request_timeout = X25_DEFAULT_T20; | |
64 | int sysctl_x25_call_request_timeout = X25_DEFAULT_T21; | |
65 | int sysctl_x25_reset_request_timeout = X25_DEFAULT_T22; | |
66 | int sysctl_x25_clear_request_timeout = X25_DEFAULT_T23; | |
67 | int sysctl_x25_ack_holdback_timeout = X25_DEFAULT_T2; | |
39e21c0d | 68 | int sysctl_x25_forward = 0; |
1da177e4 LT |
69 | |
70 | HLIST_HEAD(x25_list); | |
71 | DEFINE_RWLOCK(x25_list_lock); | |
72 | ||
90ddc4f0 | 73 | static const struct proto_ops x25_proto_ops; |
1da177e4 LT |
74 | |
75 | static struct x25_address null_x25_address = {" "}; | |
76 | ||
1b06e6ba SP |
77 | #ifdef CONFIG_COMPAT |
78 | struct compat_x25_subscrip_struct { | |
79 | char device[200-sizeof(compat_ulong_t)]; | |
80 | compat_ulong_t global_facil_mask; | |
81 | compat_uint_t extended; | |
82 | }; | |
83 | #endif | |
84 | ||
f5eb917b JH |
85 | |
86 | int x25_parse_address_block(struct sk_buff *skb, | |
87 | struct x25_address *called_addr, | |
88 | struct x25_address *calling_addr) | |
89 | { | |
90 | unsigned char len; | |
91 | int needed; | |
92 | int rc; | |
93 | ||
cb101ed2 | 94 | if (!pskb_may_pull(skb, 1)) { |
f5eb917b JH |
95 | /* packet has no address block */ |
96 | rc = 0; | |
97 | goto empty; | |
98 | } | |
99 | ||
100 | len = *skb->data; | |
101 | needed = 1 + (len >> 4) + (len & 0x0f); | |
102 | ||
cb101ed2 | 103 | if (!pskb_may_pull(skb, needed)) { |
f5eb917b JH |
104 | /* packet is too short to hold the addresses it claims |
105 | to hold */ | |
106 | rc = -1; | |
107 | goto empty; | |
108 | } | |
109 | ||
110 | return x25_addr_ntoa(skb->data, called_addr, calling_addr); | |
111 | ||
112 | empty: | |
113 | *called_addr->x25_addr = 0; | |
114 | *calling_addr->x25_addr = 0; | |
115 | ||
116 | return rc; | |
117 | } | |
118 | ||
119 | ||
1da177e4 LT |
120 | int x25_addr_ntoa(unsigned char *p, struct x25_address *called_addr, |
121 | struct x25_address *calling_addr) | |
122 | { | |
6bf1574e | 123 | unsigned int called_len, calling_len; |
1da177e4 | 124 | char *called, *calling; |
6bf1574e | 125 | unsigned int i; |
1da177e4 LT |
126 | |
127 | called_len = (*p >> 0) & 0x0F; | |
128 | calling_len = (*p >> 4) & 0x0F; | |
129 | ||
130 | called = called_addr->x25_addr; | |
131 | calling = calling_addr->x25_addr; | |
132 | p++; | |
133 | ||
134 | for (i = 0; i < (called_len + calling_len); i++) { | |
135 | if (i < called_len) { | |
136 | if (i % 2 != 0) { | |
137 | *called++ = ((*p >> 0) & 0x0F) + '0'; | |
138 | p++; | |
139 | } else { | |
140 | *called++ = ((*p >> 4) & 0x0F) + '0'; | |
141 | } | |
142 | } else { | |
143 | if (i % 2 != 0) { | |
144 | *calling++ = ((*p >> 0) & 0x0F) + '0'; | |
145 | p++; | |
146 | } else { | |
147 | *calling++ = ((*p >> 4) & 0x0F) + '0'; | |
148 | } | |
149 | } | |
150 | } | |
151 | ||
152 | *called = *calling = '\0'; | |
153 | ||
154 | return 1 + (called_len + calling_len + 1) / 2; | |
155 | } | |
156 | ||
157 | int x25_addr_aton(unsigned char *p, struct x25_address *called_addr, | |
158 | struct x25_address *calling_addr) | |
159 | { | |
160 | unsigned int called_len, calling_len; | |
161 | char *called, *calling; | |
162 | int i; | |
163 | ||
164 | called = called_addr->x25_addr; | |
165 | calling = calling_addr->x25_addr; | |
166 | ||
167 | called_len = strlen(called); | |
168 | calling_len = strlen(calling); | |
169 | ||
170 | *p++ = (calling_len << 4) | (called_len << 0); | |
171 | ||
172 | for (i = 0; i < (called_len + calling_len); i++) { | |
173 | if (i < called_len) { | |
174 | if (i % 2 != 0) { | |
175 | *p |= (*called++ - '0') << 0; | |
176 | p++; | |
177 | } else { | |
178 | *p = 0x00; | |
179 | *p |= (*called++ - '0') << 4; | |
180 | } | |
181 | } else { | |
182 | if (i % 2 != 0) { | |
183 | *p |= (*calling++ - '0') << 0; | |
184 | p++; | |
185 | } else { | |
186 | *p = 0x00; | |
187 | *p |= (*calling++ - '0') << 4; | |
188 | } | |
189 | } | |
190 | } | |
191 | ||
192 | return 1 + (called_len + calling_len + 1) / 2; | |
193 | } | |
194 | ||
195 | /* | |
196 | * Socket removal during an interrupt is now safe. | |
197 | */ | |
198 | static void x25_remove_socket(struct sock *sk) | |
199 | { | |
200 | write_lock_bh(&x25_list_lock); | |
201 | sk_del_node_init(sk); | |
202 | write_unlock_bh(&x25_list_lock); | |
203 | } | |
204 | ||
205 | /* | |
206 | * Kill all bound sockets on a dropped device. | |
207 | */ | |
208 | static void x25_kill_by_device(struct net_device *dev) | |
209 | { | |
210 | struct sock *s; | |
1da177e4 LT |
211 | |
212 | write_lock_bh(&x25_list_lock); | |
213 | ||
b67bfe0d | 214 | sk_for_each(s, &x25_list) |
1da177e4 LT |
215 | if (x25_sk(s)->neighbour && x25_sk(s)->neighbour->dev == dev) |
216 | x25_disconnect(s, ENETUNREACH, 0, 0); | |
217 | ||
218 | write_unlock_bh(&x25_list_lock); | |
219 | } | |
220 | ||
221 | /* | |
222 | * Handle device status changes. | |
223 | */ | |
224 | static int x25_device_event(struct notifier_block *this, unsigned long event, | |
225 | void *ptr) | |
226 | { | |
227 | struct net_device *dev = ptr; | |
228 | struct x25_neigh *nb; | |
229 | ||
721499e8 | 230 | if (!net_eq(dev_net(dev), &init_net)) |
e9dc8653 EB |
231 | return NOTIFY_DONE; |
232 | ||
1da177e4 | 233 | if (dev->type == ARPHRD_X25 |
29c36262 | 234 | #if IS_ENABLED(CONFIG_LLC) |
1da177e4 LT |
235 | || dev->type == ARPHRD_ETHER |
236 | #endif | |
237 | ) { | |
238 | switch (event) { | |
fddc5f3e JP |
239 | case NETDEV_UP: |
240 | x25_link_device_up(dev); | |
241 | break; | |
242 | case NETDEV_GOING_DOWN: | |
243 | nb = x25_get_neigh(dev); | |
244 | if (nb) { | |
245 | x25_terminate_link(nb); | |
246 | x25_neigh_put(nb); | |
247 | } | |
248 | break; | |
249 | case NETDEV_DOWN: | |
250 | x25_kill_by_device(dev); | |
251 | x25_route_device_down(dev); | |
252 | x25_link_device_down(dev); | |
253 | break; | |
1da177e4 LT |
254 | } |
255 | } | |
256 | ||
257 | return NOTIFY_DONE; | |
258 | } | |
259 | ||
260 | /* | |
261 | * Add a socket to the bound sockets list. | |
262 | */ | |
263 | static void x25_insert_socket(struct sock *sk) | |
264 | { | |
265 | write_lock_bh(&x25_list_lock); | |
266 | sk_add_node(sk, &x25_list); | |
267 | write_unlock_bh(&x25_list_lock); | |
268 | } | |
269 | ||
270 | /* | |
271 | * Find a socket that wants to accept the Call Request we just | |
272 | * received. Check the full list for an address/cud match. | |
273 | * If no cuds match return the next_best thing, an address match. | |
274 | * Note: if a listening socket has cud set it must only get calls | |
275 | * with matching cud. | |
276 | */ | |
cb65d506 SP |
277 | static struct sock *x25_find_listener(struct x25_address *addr, |
278 | struct sk_buff *skb) | |
1da177e4 LT |
279 | { |
280 | struct sock *s; | |
281 | struct sock *next_best; | |
1da177e4 LT |
282 | |
283 | read_lock_bh(&x25_list_lock); | |
284 | next_best = NULL; | |
285 | ||
b67bfe0d | 286 | sk_for_each(s, &x25_list) |
1da177e4 | 287 | if ((!strcmp(addr->x25_addr, |
cb65d506 SP |
288 | x25_sk(s)->source_addr.x25_addr) || |
289 | !strcmp(addr->x25_addr, | |
290 | null_x25_address.x25_addr)) && | |
291 | s->sk_state == TCP_LISTEN) { | |
1da177e4 LT |
292 | /* |
293 | * Found a listening socket, now check the incoming | |
294 | * call user data vs this sockets call user data | |
295 | */ | |
7f81e25b MD |
296 | if (x25_sk(s)->cudmatchlength > 0 && |
297 | skb->len >= x25_sk(s)->cudmatchlength) { | |
f8e1d201 YH |
298 | if((memcmp(x25_sk(s)->calluserdata.cuddata, |
299 | skb->data, | |
cb65d506 SP |
300 | x25_sk(s)->cudmatchlength)) == 0) { |
301 | sock_hold(s); | |
302 | goto found; | |
303 | } | |
304 | } else | |
1da177e4 | 305 | next_best = s; |
1da177e4 LT |
306 | } |
307 | if (next_best) { | |
308 | s = next_best; | |
309 | sock_hold(s); | |
310 | goto found; | |
311 | } | |
312 | s = NULL; | |
313 | found: | |
314 | read_unlock_bh(&x25_list_lock); | |
315 | return s; | |
316 | } | |
317 | ||
318 | /* | |
319 | * Find a connected X.25 socket given my LCI and neighbour. | |
320 | */ | |
321 | static struct sock *__x25_find_socket(unsigned int lci, struct x25_neigh *nb) | |
322 | { | |
323 | struct sock *s; | |
1da177e4 | 324 | |
b67bfe0d | 325 | sk_for_each(s, &x25_list) |
1da177e4 LT |
326 | if (x25_sk(s)->lci == lci && x25_sk(s)->neighbour == nb) { |
327 | sock_hold(s); | |
328 | goto found; | |
329 | } | |
330 | s = NULL; | |
331 | found: | |
332 | return s; | |
333 | } | |
334 | ||
335 | struct sock *x25_find_socket(unsigned int lci, struct x25_neigh *nb) | |
336 | { | |
337 | struct sock *s; | |
338 | ||
339 | read_lock_bh(&x25_list_lock); | |
340 | s = __x25_find_socket(lci, nb); | |
341 | read_unlock_bh(&x25_list_lock); | |
342 | return s; | |
343 | } | |
344 | ||
345 | /* | |
346 | * Find a unique LCI for a given device. | |
347 | */ | |
348 | static unsigned int x25_new_lci(struct x25_neigh *nb) | |
349 | { | |
350 | unsigned int lci = 1; | |
351 | struct sock *sk; | |
352 | ||
353 | read_lock_bh(&x25_list_lock); | |
354 | ||
355 | while ((sk = __x25_find_socket(lci, nb)) != NULL) { | |
356 | sock_put(sk); | |
357 | if (++lci == 4096) { | |
358 | lci = 0; | |
359 | break; | |
360 | } | |
361 | } | |
362 | ||
363 | read_unlock_bh(&x25_list_lock); | |
364 | return lci; | |
365 | } | |
366 | ||
367 | /* | |
368 | * Deferred destroy. | |
369 | */ | |
14ebaf81 | 370 | static void __x25_destroy_socket(struct sock *); |
1da177e4 LT |
371 | |
372 | /* | |
373 | * handler for deferred kills. | |
374 | */ | |
375 | static void x25_destroy_timer(unsigned long data) | |
376 | { | |
14ebaf81 | 377 | x25_destroy_socket_from_timer((struct sock *)data); |
1da177e4 LT |
378 | } |
379 | ||
380 | /* | |
381 | * This is called from user mode and the timers. Thus it protects itself | |
382 | * against interrupt users but doesn't worry about being called during | |
383 | * work. Once it is removed from the queue no interrupt or bottom half | |
384 | * will touch it and we are (fairly 8-) ) safe. | |
385 | * Not static as it's used by the timer | |
386 | */ | |
14ebaf81 | 387 | static void __x25_destroy_socket(struct sock *sk) |
1da177e4 LT |
388 | { |
389 | struct sk_buff *skb; | |
390 | ||
1da177e4 LT |
391 | x25_stop_heartbeat(sk); |
392 | x25_stop_timer(sk); | |
393 | ||
394 | x25_remove_socket(sk); | |
395 | x25_clear_queues(sk); /* Flush the queues */ | |
396 | ||
397 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
398 | if (skb->sk != sk) { /* A pending connection */ | |
399 | /* | |
400 | * Queue the unaccepted socket for death | |
401 | */ | |
2cec6b01 | 402 | skb->sk->sk_state = TCP_LISTEN; |
1da177e4 LT |
403 | sock_set_flag(skb->sk, SOCK_DEAD); |
404 | x25_start_heartbeat(skb->sk); | |
405 | x25_sk(skb->sk)->state = X25_STATE_0; | |
406 | } | |
407 | ||
408 | kfree_skb(skb); | |
409 | } | |
410 | ||
c564039f | 411 | if (sk_has_allocations(sk)) { |
1da177e4 LT |
412 | /* Defer: outstanding buffers */ |
413 | sk->sk_timer.expires = jiffies + 10 * HZ; | |
414 | sk->sk_timer.function = x25_destroy_timer; | |
415 | sk->sk_timer.data = (unsigned long)sk; | |
416 | add_timer(&sk->sk_timer); | |
417 | } else { | |
418 | /* drop last reference so sock_put will free */ | |
419 | __sock_put(sk); | |
420 | } | |
14ebaf81 | 421 | } |
1da177e4 | 422 | |
14ebaf81 DM |
423 | void x25_destroy_socket_from_timer(struct sock *sk) |
424 | { | |
425 | sock_hold(sk); | |
426 | bh_lock_sock(sk); | |
427 | __x25_destroy_socket(sk); | |
428 | bh_unlock_sock(sk); | |
429 | sock_put(sk); | |
430 | } | |
431 | ||
1da177e4 LT |
432 | /* |
433 | * Handling for system calls applied via the various interfaces to a | |
434 | * X.25 socket object. | |
435 | */ | |
436 | ||
437 | static int x25_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 438 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
439 | { |
440 | int opt; | |
441 | struct sock *sk = sock->sk; | |
442 | int rc = -ENOPROTOOPT; | |
443 | ||
444 | if (level != SOL_X25 || optname != X25_QBITINCL) | |
445 | goto out; | |
446 | ||
447 | rc = -EINVAL; | |
448 | if (optlen < sizeof(int)) | |
449 | goto out; | |
450 | ||
451 | rc = -EFAULT; | |
452 | if (get_user(opt, (int __user *)optval)) | |
453 | goto out; | |
454 | ||
cb863ffd | 455 | if (opt) |
456 | set_bit(X25_Q_BIT_FLAG, &x25_sk(sk)->flags); | |
457 | else | |
458 | clear_bit(X25_Q_BIT_FLAG, &x25_sk(sk)->flags); | |
1da177e4 LT |
459 | rc = 0; |
460 | out: | |
461 | return rc; | |
462 | } | |
463 | ||
464 | static int x25_getsockopt(struct socket *sock, int level, int optname, | |
465 | char __user *optval, int __user *optlen) | |
466 | { | |
467 | struct sock *sk = sock->sk; | |
468 | int val, len, rc = -ENOPROTOOPT; | |
f8e1d201 | 469 | |
1da177e4 LT |
470 | if (level != SOL_X25 || optname != X25_QBITINCL) |
471 | goto out; | |
472 | ||
473 | rc = -EFAULT; | |
474 | if (get_user(len, optlen)) | |
475 | goto out; | |
476 | ||
477 | len = min_t(unsigned int, len, sizeof(int)); | |
478 | ||
479 | rc = -EINVAL; | |
480 | if (len < 0) | |
481 | goto out; | |
f8e1d201 | 482 | |
1da177e4 LT |
483 | rc = -EFAULT; |
484 | if (put_user(len, optlen)) | |
485 | goto out; | |
486 | ||
cb863ffd | 487 | val = test_bit(X25_Q_BIT_FLAG, &x25_sk(sk)->flags); |
1da177e4 LT |
488 | rc = copy_to_user(optval, &val, len) ? -EFAULT : 0; |
489 | out: | |
490 | return rc; | |
491 | } | |
492 | ||
493 | static int x25_listen(struct socket *sock, int backlog) | |
494 | { | |
495 | struct sock *sk = sock->sk; | |
496 | int rc = -EOPNOTSUPP; | |
497 | ||
25aa4efe | 498 | lock_sock(sk); |
1da177e4 LT |
499 | if (sk->sk_state != TCP_LISTEN) { |
500 | memset(&x25_sk(sk)->dest_addr, 0, X25_ADDR_LEN); | |
501 | sk->sk_max_ack_backlog = backlog; | |
502 | sk->sk_state = TCP_LISTEN; | |
503 | rc = 0; | |
504 | } | |
25aa4efe | 505 | release_sock(sk); |
1da177e4 LT |
506 | |
507 | return rc; | |
508 | } | |
509 | ||
510 | static struct proto x25_proto = { | |
511 | .name = "X25", | |
512 | .owner = THIS_MODULE, | |
513 | .obj_size = sizeof(struct x25_sock), | |
514 | }; | |
515 | ||
1b8d7ae4 | 516 | static struct sock *x25_alloc_socket(struct net *net) |
1da177e4 LT |
517 | { |
518 | struct x25_sock *x25; | |
6257ff21 | 519 | struct sock *sk = sk_alloc(net, AF_X25, GFP_ATOMIC, &x25_proto); |
1da177e4 LT |
520 | |
521 | if (!sk) | |
522 | goto out; | |
523 | ||
524 | sock_init_data(NULL, sk); | |
525 | ||
526 | x25 = x25_sk(sk); | |
527 | skb_queue_head_init(&x25->ack_queue); | |
528 | skb_queue_head_init(&x25->fragment_queue); | |
529 | skb_queue_head_init(&x25->interrupt_in_queue); | |
530 | skb_queue_head_init(&x25->interrupt_out_queue); | |
531 | out: | |
532 | return sk; | |
533 | } | |
534 | ||
3f378b68 EP |
535 | static int x25_create(struct net *net, struct socket *sock, int protocol, |
536 | int kern) | |
1da177e4 LT |
537 | { |
538 | struct sock *sk; | |
539 | struct x25_sock *x25; | |
b18e7a06 | 540 | int rc = -EAFNOSUPPORT; |
1da177e4 | 541 | |
09ad9bc7 | 542 | if (!net_eq(net, &init_net)) |
b18e7a06 | 543 | goto out; |
544 | ||
545 | rc = -ESOCKTNOSUPPORT; | |
546 | if (sock->type != SOCK_SEQPACKET) | |
547 | goto out; | |
1b8d7ae4 | 548 | |
b18e7a06 | 549 | rc = -EINVAL; |
550 | if (protocol) | |
1da177e4 LT |
551 | goto out; |
552 | ||
b18e7a06 | 553 | rc = -ENOBUFS; |
1b8d7ae4 | 554 | if ((sk = x25_alloc_socket(net)) == NULL) |
1da177e4 LT |
555 | goto out; |
556 | ||
557 | x25 = x25_sk(sk); | |
558 | ||
559 | sock_init_data(sock, sk); | |
560 | ||
561 | x25_init_timers(sk); | |
562 | ||
563 | sock->ops = &x25_proto_ops; | |
564 | sk->sk_protocol = protocol; | |
565 | sk->sk_backlog_rcv = x25_backlog_rcv; | |
566 | ||
567 | x25->t21 = sysctl_x25_call_request_timeout; | |
568 | x25->t22 = sysctl_x25_reset_request_timeout; | |
569 | x25->t23 = sysctl_x25_clear_request_timeout; | |
570 | x25->t2 = sysctl_x25_ack_holdback_timeout; | |
571 | x25->state = X25_STATE_0; | |
cb65d506 | 572 | x25->cudmatchlength = 0; |
37cda787 | 573 | set_bit(X25_ACCPT_APPRV_FLAG, &x25->flags); /* normally no cud */ |
ebc3f64b | 574 | /* on call accept */ |
1da177e4 LT |
575 | |
576 | x25->facilities.winsize_in = X25_DEFAULT_WINDOW_SIZE; | |
577 | x25->facilities.winsize_out = X25_DEFAULT_WINDOW_SIZE; | |
578 | x25->facilities.pacsize_in = X25_DEFAULT_PACKET_SIZE; | |
579 | x25->facilities.pacsize_out = X25_DEFAULT_PACKET_SIZE; | |
ddd0451f JH |
580 | x25->facilities.throughput = 0; /* by default don't negotiate |
581 | throughput */ | |
1da177e4 | 582 | x25->facilities.reverse = X25_DEFAULT_REVERSE; |
f8e1d201 YH |
583 | x25->dte_facilities.calling_len = 0; |
584 | x25->dte_facilities.called_len = 0; | |
585 | memset(x25->dte_facilities.called_ae, '\0', | |
586 | sizeof(x25->dte_facilities.called_ae)); | |
587 | memset(x25->dte_facilities.calling_ae, '\0', | |
588 | sizeof(x25->dte_facilities.calling_ae)); | |
a64b7b93 | 589 | |
1da177e4 LT |
590 | rc = 0; |
591 | out: | |
592 | return rc; | |
593 | } | |
594 | ||
595 | static struct sock *x25_make_new(struct sock *osk) | |
596 | { | |
597 | struct sock *sk = NULL; | |
598 | struct x25_sock *x25, *ox25; | |
599 | ||
600 | if (osk->sk_type != SOCK_SEQPACKET) | |
601 | goto out; | |
602 | ||
3b1e0a65 | 603 | if ((sk = x25_alloc_socket(sock_net(osk))) == NULL) |
1da177e4 LT |
604 | goto out; |
605 | ||
606 | x25 = x25_sk(sk); | |
607 | ||
608 | sk->sk_type = osk->sk_type; | |
1da177e4 LT |
609 | sk->sk_priority = osk->sk_priority; |
610 | sk->sk_protocol = osk->sk_protocol; | |
611 | sk->sk_rcvbuf = osk->sk_rcvbuf; | |
612 | sk->sk_sndbuf = osk->sk_sndbuf; | |
613 | sk->sk_state = TCP_ESTABLISHED; | |
1da177e4 | 614 | sk->sk_backlog_rcv = osk->sk_backlog_rcv; |
a20a8554 | 615 | sock_copy_flags(sk, osk); |
1da177e4 LT |
616 | |
617 | ox25 = x25_sk(osk); | |
618 | x25->t21 = ox25->t21; | |
619 | x25->t22 = ox25->t22; | |
620 | x25->t23 = ox25->t23; | |
621 | x25->t2 = ox25->t2; | |
cb863ffd | 622 | x25->flags = ox25->flags; |
1da177e4 | 623 | x25->facilities = ox25->facilities; |
a64b7b93 | 624 | x25->dte_facilities = ox25->dte_facilities; |
cb65d506 | 625 | x25->cudmatchlength = ox25->cudmatchlength; |
1da177e4 | 626 | |
b7792e34 | 627 | clear_bit(X25_INTERRUPT_FLAG, &x25->flags); |
1da177e4 LT |
628 | x25_init_timers(sk); |
629 | out: | |
630 | return sk; | |
631 | } | |
632 | ||
633 | static int x25_release(struct socket *sock) | |
634 | { | |
635 | struct sock *sk = sock->sk; | |
636 | struct x25_sock *x25; | |
637 | ||
638 | if (!sk) | |
77b22836 | 639 | return 0; |
1da177e4 LT |
640 | |
641 | x25 = x25_sk(sk); | |
642 | ||
77b22836 AB |
643 | sock_hold(sk); |
644 | lock_sock(sk); | |
1da177e4 LT |
645 | switch (x25->state) { |
646 | ||
647 | case X25_STATE_0: | |
648 | case X25_STATE_2: | |
649 | x25_disconnect(sk, 0, 0, 0); | |
77b22836 | 650 | __x25_destroy_socket(sk); |
1da177e4 LT |
651 | goto out; |
652 | ||
653 | case X25_STATE_1: | |
654 | case X25_STATE_3: | |
655 | case X25_STATE_4: | |
656 | x25_clear_queues(sk); | |
657 | x25_write_internal(sk, X25_CLEAR_REQUEST); | |
658 | x25_start_t23timer(sk); | |
659 | x25->state = X25_STATE_2; | |
660 | sk->sk_state = TCP_CLOSE; | |
661 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
662 | sk->sk_state_change(sk); | |
663 | sock_set_flag(sk, SOCK_DEAD); | |
664 | sock_set_flag(sk, SOCK_DESTROY); | |
665 | break; | |
666 | } | |
667 | ||
c751e4f8 | 668 | sock_orphan(sk); |
1da177e4 | 669 | out: |
77b22836 AB |
670 | release_sock(sk); |
671 | sock_put(sk); | |
1da177e4 LT |
672 | return 0; |
673 | } | |
674 | ||
675 | static int x25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
676 | { | |
677 | struct sock *sk = sock->sk; | |
678 | struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr; | |
a9288525 | 679 | int len, i, rc = 0; |
1da177e4 LT |
680 | |
681 | if (!sock_flag(sk, SOCK_ZAPPED) || | |
682 | addr_len != sizeof(struct sockaddr_x25) || | |
91774904 AB |
683 | addr->sx25_family != AF_X25) { |
684 | rc = -EINVAL; | |
685 | goto out; | |
686 | } | |
1da177e4 | 687 | |
a9288525 | 688 | len = strlen(addr->sx25_addr.x25_addr); |
689 | for (i = 0; i < len; i++) { | |
690 | if (!isdigit(addr->sx25_addr.x25_addr[i])) { | |
691 | rc = -EINVAL; | |
692 | goto out; | |
693 | } | |
694 | } | |
695 | ||
90c27297 | 696 | lock_sock(sk); |
1da177e4 LT |
697 | x25_sk(sk)->source_addr = addr->sx25_addr; |
698 | x25_insert_socket(sk); | |
699 | sock_reset_flag(sk, SOCK_ZAPPED); | |
90c27297 | 700 | release_sock(sk); |
1da177e4 | 701 | SOCK_DEBUG(sk, "x25_bind: socket is bound\n"); |
91774904 | 702 | out: |
91774904 | 703 | return rc; |
1da177e4 LT |
704 | } |
705 | ||
706 | static int x25_wait_for_connection_establishment(struct sock *sk) | |
707 | { | |
708 | DECLARE_WAITQUEUE(wait, current); | |
f8e1d201 | 709 | int rc; |
1da177e4 | 710 | |
aa395145 | 711 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
1da177e4 LT |
712 | for (;;) { |
713 | __set_current_state(TASK_INTERRUPTIBLE); | |
714 | rc = -ERESTARTSYS; | |
715 | if (signal_pending(current)) | |
716 | break; | |
717 | rc = sock_error(sk); | |
718 | if (rc) { | |
719 | sk->sk_socket->state = SS_UNCONNECTED; | |
720 | break; | |
721 | } | |
722 | rc = 0; | |
723 | if (sk->sk_state != TCP_ESTABLISHED) { | |
724 | release_sock(sk); | |
725 | schedule(); | |
726 | lock_sock(sk); | |
727 | } else | |
728 | break; | |
729 | } | |
730 | __set_current_state(TASK_RUNNING); | |
aa395145 | 731 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
732 | return rc; |
733 | } | |
734 | ||
735 | static int x25_connect(struct socket *sock, struct sockaddr *uaddr, | |
736 | int addr_len, int flags) | |
737 | { | |
738 | struct sock *sk = sock->sk; | |
739 | struct x25_sock *x25 = x25_sk(sk); | |
740 | struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr; | |
741 | struct x25_route *rt; | |
742 | int rc = 0; | |
743 | ||
744 | lock_sock(sk); | |
745 | if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { | |
746 | sock->state = SS_CONNECTED; | |
747 | goto out; /* Connect completed during a ERESTARTSYS event */ | |
748 | } | |
749 | ||
750 | rc = -ECONNREFUSED; | |
751 | if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { | |
752 | sock->state = SS_UNCONNECTED; | |
753 | goto out; | |
754 | } | |
755 | ||
756 | rc = -EISCONN; /* No reconnect on a seqpacket socket */ | |
757 | if (sk->sk_state == TCP_ESTABLISHED) | |
758 | goto out; | |
759 | ||
f8e1d201 | 760 | sk->sk_state = TCP_CLOSE; |
1da177e4 LT |
761 | sock->state = SS_UNCONNECTED; |
762 | ||
763 | rc = -EINVAL; | |
764 | if (addr_len != sizeof(struct sockaddr_x25) || | |
765 | addr->sx25_family != AF_X25) | |
766 | goto out; | |
767 | ||
768 | rc = -ENETUNREACH; | |
769 | rt = x25_get_route(&addr->sx25_addr); | |
770 | if (!rt) | |
771 | goto out; | |
772 | ||
773 | x25->neighbour = x25_get_neigh(rt->dev); | |
774 | if (!x25->neighbour) | |
775 | goto out_put_route; | |
776 | ||
777 | x25_limit_facilities(&x25->facilities, x25->neighbour); | |
778 | ||
779 | x25->lci = x25_new_lci(x25->neighbour); | |
780 | if (!x25->lci) | |
781 | goto out_put_neigh; | |
782 | ||
783 | rc = -EINVAL; | |
784 | if (sock_flag(sk, SOCK_ZAPPED)) /* Must bind first - autobinding does not work */ | |
785 | goto out_put_neigh; | |
786 | ||
787 | if (!strcmp(x25->source_addr.x25_addr, null_x25_address.x25_addr)) | |
788 | memset(&x25->source_addr, '\0', X25_ADDR_LEN); | |
789 | ||
790 | x25->dest_addr = addr->sx25_addr; | |
791 | ||
792 | /* Move to connecting socket, start sending Connect Requests */ | |
793 | sock->state = SS_CONNECTING; | |
794 | sk->sk_state = TCP_SYN_SENT; | |
795 | ||
796 | x25->state = X25_STATE_1; | |
797 | ||
798 | x25_write_internal(sk, X25_CALL_REQUEST); | |
799 | ||
800 | x25_start_heartbeat(sk); | |
801 | x25_start_t21timer(sk); | |
802 | ||
803 | /* Now the loop */ | |
804 | rc = -EINPROGRESS; | |
805 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) | |
806 | goto out_put_neigh; | |
807 | ||
808 | rc = x25_wait_for_connection_establishment(sk); | |
809 | if (rc) | |
810 | goto out_put_neigh; | |
811 | ||
812 | sock->state = SS_CONNECTED; | |
813 | rc = 0; | |
814 | out_put_neigh: | |
815 | if (rc) | |
816 | x25_neigh_put(x25->neighbour); | |
817 | out_put_route: | |
818 | x25_route_put(rt); | |
819 | out: | |
820 | release_sock(sk); | |
821 | return rc; | |
822 | } | |
823 | ||
bac37ec8 | 824 | static int x25_wait_for_data(struct sock *sk, long timeout) |
1da177e4 LT |
825 | { |
826 | DECLARE_WAITQUEUE(wait, current); | |
827 | int rc = 0; | |
828 | ||
aa395145 | 829 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
1da177e4 LT |
830 | for (;;) { |
831 | __set_current_state(TASK_INTERRUPTIBLE); | |
832 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
833 | break; | |
834 | rc = -ERESTARTSYS; | |
835 | if (signal_pending(current)) | |
836 | break; | |
837 | rc = -EAGAIN; | |
838 | if (!timeout) | |
839 | break; | |
840 | rc = 0; | |
841 | if (skb_queue_empty(&sk->sk_receive_queue)) { | |
842 | release_sock(sk); | |
843 | timeout = schedule_timeout(timeout); | |
844 | lock_sock(sk); | |
845 | } else | |
846 | break; | |
847 | } | |
848 | __set_current_state(TASK_RUNNING); | |
aa395145 | 849 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
850 | return rc; |
851 | } | |
f8e1d201 | 852 | |
1da177e4 LT |
853 | static int x25_accept(struct socket *sock, struct socket *newsock, int flags) |
854 | { | |
855 | struct sock *sk = sock->sk; | |
856 | struct sock *newsk; | |
857 | struct sk_buff *skb; | |
858 | int rc = -EINVAL; | |
859 | ||
141646ce | 860 | if (!sk) |
1da177e4 LT |
861 | goto out; |
862 | ||
863 | rc = -EOPNOTSUPP; | |
864 | if (sk->sk_type != SOCK_SEQPACKET) | |
865 | goto out; | |
866 | ||
867 | lock_sock(sk); | |
141646ce AH |
868 | rc = -EINVAL; |
869 | if (sk->sk_state != TCP_LISTEN) | |
870 | goto out2; | |
871 | ||
1da177e4 LT |
872 | rc = x25_wait_for_data(sk, sk->sk_rcvtimeo); |
873 | if (rc) | |
874 | goto out2; | |
875 | skb = skb_dequeue(&sk->sk_receive_queue); | |
876 | rc = -EINVAL; | |
877 | if (!skb->sk) | |
878 | goto out2; | |
879 | newsk = skb->sk; | |
b61d38e0 | 880 | sock_graft(newsk, newsock); |
1da177e4 LT |
881 | |
882 | /* Now attach up the new socket */ | |
883 | skb->sk = NULL; | |
884 | kfree_skb(skb); | |
885 | sk->sk_ack_backlog--; | |
1da177e4 LT |
886 | newsock->state = SS_CONNECTED; |
887 | rc = 0; | |
888 | out2: | |
889 | release_sock(sk); | |
890 | out: | |
891 | return rc; | |
892 | } | |
893 | ||
894 | static int x25_getname(struct socket *sock, struct sockaddr *uaddr, | |
895 | int *uaddr_len, int peer) | |
896 | { | |
897 | struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)uaddr; | |
898 | struct sock *sk = sock->sk; | |
899 | struct x25_sock *x25 = x25_sk(sk); | |
91774904 | 900 | int rc = 0; |
1da177e4 LT |
901 | |
902 | if (peer) { | |
91774904 AB |
903 | if (sk->sk_state != TCP_ESTABLISHED) { |
904 | rc = -ENOTCONN; | |
905 | goto out; | |
906 | } | |
1da177e4 LT |
907 | sx25->sx25_addr = x25->dest_addr; |
908 | } else | |
909 | sx25->sx25_addr = x25->source_addr; | |
910 | ||
911 | sx25->sx25_family = AF_X25; | |
912 | *uaddr_len = sizeof(*sx25); | |
913 | ||
91774904 | 914 | out: |
91774904 AB |
915 | return rc; |
916 | } | |
917 | ||
1da177e4 LT |
918 | int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *nb, |
919 | unsigned int lci) | |
920 | { | |
921 | struct sock *sk; | |
922 | struct sock *make; | |
923 | struct x25_sock *makex25; | |
924 | struct x25_address source_addr, dest_addr; | |
925 | struct x25_facilities facilities; | |
a64b7b93 | 926 | struct x25_dte_facilities dte_facilities; |
95a9dc43 | 927 | int len, addr_len, rc; |
1da177e4 LT |
928 | |
929 | /* | |
930 | * Remove the LCI and frame type. | |
931 | */ | |
932 | skb_pull(skb, X25_STD_MIN_LEN); | |
933 | ||
934 | /* | |
935 | * Extract the X.25 addresses and convert them to ASCII strings, | |
936 | * and remove them. | |
f5eb917b JH |
937 | * |
938 | * Address block is mandatory in call request packets | |
1da177e4 | 939 | */ |
f5eb917b JH |
940 | addr_len = x25_parse_address_block(skb, &source_addr, &dest_addr); |
941 | if (addr_len <= 0) | |
942 | goto out_clear_request; | |
95a9dc43 | 943 | skb_pull(skb, addr_len); |
1da177e4 LT |
944 | |
945 | /* | |
946 | * Get the length of the facilities, skip past them for the moment | |
947 | * get the call user data because this is needed to determine | |
948 | * the correct listener | |
f5eb917b JH |
949 | * |
950 | * Facilities length is mandatory in call request packets | |
1da177e4 | 951 | */ |
cb101ed2 | 952 | if (!pskb_may_pull(skb, 1)) |
f5eb917b | 953 | goto out_clear_request; |
1da177e4 | 954 | len = skb->data[0] + 1; |
cb101ed2 | 955 | if (!pskb_may_pull(skb, len)) |
f5eb917b | 956 | goto out_clear_request; |
1da177e4 LT |
957 | skb_pull(skb,len); |
958 | ||
c7fd0d48 MD |
959 | /* |
960 | * Ensure that the amount of call user data is valid. | |
961 | */ | |
962 | if (skb->len > X25_MAX_CUD_LEN) | |
963 | goto out_clear_request; | |
964 | ||
cb101ed2 MD |
965 | /* |
966 | * Get all the call user data so it can be used in | |
967 | * x25_find_listener and skb_copy_from_linear_data up ahead. | |
968 | */ | |
969 | if (!pskb_may_pull(skb, skb->len)) | |
970 | goto out_clear_request; | |
971 | ||
1da177e4 LT |
972 | /* |
973 | * Find a listener for the particular address/cud pair. | |
974 | */ | |
cb65d506 SP |
975 | sk = x25_find_listener(&source_addr,skb); |
976 | skb_push(skb,len); | |
1da177e4 | 977 | |
95a9dc43 AH |
978 | if (sk != NULL && sk_acceptq_is_full(sk)) { |
979 | goto out_sock_put; | |
980 | } | |
981 | ||
1da177e4 | 982 | /* |
95a9dc43 AH |
983 | * We dont have any listeners for this incoming call. |
984 | * Try forwarding it. | |
1da177e4 | 985 | */ |
95a9dc43 AH |
986 | if (sk == NULL) { |
987 | skb_push(skb, addr_len + X25_STD_MIN_LEN); | |
39e21c0d AH |
988 | if (sysctl_x25_forward && |
989 | x25_forward_call(&dest_addr, nb, skb, lci) > 0) | |
95a9dc43 AH |
990 | { |
991 | /* Call was forwarded, dont process it any more */ | |
992 | kfree_skb(skb); | |
993 | rc = 1; | |
994 | goto out; | |
995 | } else { | |
996 | /* No listeners, can't forward, clear the call */ | |
997 | goto out_clear_request; | |
998 | } | |
999 | } | |
1da177e4 LT |
1000 | |
1001 | /* | |
1002 | * Try to reach a compromise on the requested facilities. | |
1003 | */ | |
a64b7b93 SP |
1004 | len = x25_negotiate_facilities(skb, sk, &facilities, &dte_facilities); |
1005 | if (len == -1) | |
1da177e4 LT |
1006 | goto out_sock_put; |
1007 | ||
1008 | /* | |
1009 | * current neighbour/link might impose additional limits | |
1010 | * on certain facilties | |
1011 | */ | |
1012 | ||
1013 | x25_limit_facilities(&facilities, nb); | |
1014 | ||
1015 | /* | |
1016 | * Try to create a new socket. | |
1017 | */ | |
1018 | make = x25_make_new(sk); | |
1019 | if (!make) | |
1020 | goto out_sock_put; | |
1021 | ||
1022 | /* | |
1023 | * Remove the facilities | |
1024 | */ | |
1025 | skb_pull(skb, len); | |
1026 | ||
1027 | skb->sk = make; | |
1028 | make->sk_state = TCP_ESTABLISHED; | |
1029 | ||
1030 | makex25 = x25_sk(make); | |
1031 | makex25->lci = lci; | |
1032 | makex25->dest_addr = dest_addr; | |
1033 | makex25->source_addr = source_addr; | |
1034 | makex25->neighbour = nb; | |
1035 | makex25->facilities = facilities; | |
a64b7b93 | 1036 | makex25->dte_facilities= dte_facilities; |
1da177e4 | 1037 | makex25->vc_facil_mask = x25_sk(sk)->vc_facil_mask; |
cb65d506 SP |
1038 | /* ensure no reverse facil on accept */ |
1039 | makex25->vc_facil_mask &= ~X25_MASK_REVERSE; | |
a64b7b93 SP |
1040 | /* ensure no calling address extension on accept */ |
1041 | makex25->vc_facil_mask &= ~X25_MASK_CALLING_AE; | |
cb65d506 | 1042 | makex25->cudmatchlength = x25_sk(sk)->cudmatchlength; |
1da177e4 | 1043 | |
37cda787 | 1044 | /* Normally all calls are accepted immediately */ |
1045 | if (test_bit(X25_ACCPT_APPRV_FLAG, &makex25->flags)) { | |
ebc3f64b SP |
1046 | x25_write_internal(make, X25_CALL_ACCEPTED); |
1047 | makex25->state = X25_STATE_3; | |
1048 | } | |
1da177e4 | 1049 | |
cb65d506 SP |
1050 | /* |
1051 | * Incoming Call User Data. | |
1052 | */ | |
8db09f26 RK |
1053 | skb_copy_from_linear_data(skb, makex25->calluserdata.cuddata, skb->len); |
1054 | makex25->calluserdata.cudlength = skb->len; | |
cb65d506 | 1055 | |
1da177e4 LT |
1056 | sk->sk_ack_backlog++; |
1057 | ||
1058 | x25_insert_socket(make); | |
1059 | ||
1060 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1061 | ||
1062 | x25_start_heartbeat(make); | |
1063 | ||
1064 | if (!sock_flag(sk, SOCK_DEAD)) | |
1065 | sk->sk_data_ready(sk, skb->len); | |
1066 | rc = 1; | |
1067 | sock_put(sk); | |
1068 | out: | |
1069 | return rc; | |
1070 | out_sock_put: | |
1071 | sock_put(sk); | |
1072 | out_clear_request: | |
1073 | rc = 0; | |
1074 | x25_transmit_clear_request(nb, lci, 0x01); | |
1075 | goto out; | |
1076 | } | |
1077 | ||
1078 | static int x25_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1079 | struct msghdr *msg, size_t len) | |
1080 | { | |
1081 | struct sock *sk = sock->sk; | |
1082 | struct x25_sock *x25 = x25_sk(sk); | |
1083 | struct sockaddr_x25 *usx25 = (struct sockaddr_x25 *)msg->msg_name; | |
1084 | struct sockaddr_x25 sx25; | |
1085 | struct sk_buff *skb; | |
1086 | unsigned char *asmptr; | |
1087 | int noblock = msg->msg_flags & MSG_DONTWAIT; | |
1088 | size_t size; | |
1089 | int qbit = 0, rc = -EINVAL; | |
1090 | ||
77b22836 | 1091 | lock_sock(sk); |
1da177e4 LT |
1092 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_OOB|MSG_EOR|MSG_CMSG_COMPAT)) |
1093 | goto out; | |
1094 | ||
1095 | /* we currently don't support segmented records at the user interface */ | |
1096 | if (!(msg->msg_flags & (MSG_EOR|MSG_OOB))) | |
1097 | goto out; | |
1098 | ||
1099 | rc = -EADDRNOTAVAIL; | |
1100 | if (sock_flag(sk, SOCK_ZAPPED)) | |
1101 | goto out; | |
1102 | ||
1103 | rc = -EPIPE; | |
1104 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1105 | send_sig(SIGPIPE, current, 0); | |
1106 | goto out; | |
1107 | } | |
1108 | ||
1109 | rc = -ENETUNREACH; | |
1110 | if (!x25->neighbour) | |
1111 | goto out; | |
1112 | ||
1113 | if (usx25) { | |
1114 | rc = -EINVAL; | |
1115 | if (msg->msg_namelen < sizeof(sx25)) | |
1116 | goto out; | |
1117 | memcpy(&sx25, usx25, sizeof(sx25)); | |
1118 | rc = -EISCONN; | |
1119 | if (strcmp(x25->dest_addr.x25_addr, sx25.sx25_addr.x25_addr)) | |
1120 | goto out; | |
1121 | rc = -EINVAL; | |
1122 | if (sx25.sx25_family != AF_X25) | |
1123 | goto out; | |
1124 | } else { | |
1125 | /* | |
1126 | * FIXME 1003.1g - if the socket is like this because | |
1127 | * it has become closed (not started closed) we ought | |
1128 | * to SIGPIPE, EPIPE; | |
1129 | */ | |
1130 | rc = -ENOTCONN; | |
1131 | if (sk->sk_state != TCP_ESTABLISHED) | |
1132 | goto out; | |
1133 | ||
1134 | sx25.sx25_family = AF_X25; | |
1135 | sx25.sx25_addr = x25->dest_addr; | |
1136 | } | |
1137 | ||
83e0bbcb AC |
1138 | /* Sanity check the packet size */ |
1139 | if (len > 65535) { | |
1140 | rc = -EMSGSIZE; | |
1141 | goto out; | |
1142 | } | |
1143 | ||
1da177e4 LT |
1144 | SOCK_DEBUG(sk, "x25_sendmsg: sendto: Addresses built.\n"); |
1145 | ||
1146 | /* Build a packet */ | |
1147 | SOCK_DEBUG(sk, "x25_sendmsg: sendto: building packet.\n"); | |
1148 | ||
1149 | if ((msg->msg_flags & MSG_OOB) && len > 32) | |
1150 | len = 32; | |
1151 | ||
1152 | size = len + X25_MAX_L2_LEN + X25_EXT_MIN_LEN; | |
1153 | ||
77b22836 | 1154 | release_sock(sk); |
1da177e4 | 1155 | skb = sock_alloc_send_skb(sk, size, noblock, &rc); |
77b22836 | 1156 | lock_sock(sk); |
1da177e4 LT |
1157 | if (!skb) |
1158 | goto out; | |
1159 | X25_SKB_CB(skb)->flags = msg->msg_flags; | |
1160 | ||
1161 | skb_reserve(skb, X25_MAX_L2_LEN + X25_EXT_MIN_LEN); | |
1162 | ||
1163 | /* | |
1164 | * Put the data on the end | |
1165 | */ | |
1166 | SOCK_DEBUG(sk, "x25_sendmsg: Copying user data\n"); | |
1167 | ||
eeeb0374 ACM |
1168 | skb_reset_transport_header(skb); |
1169 | skb_put(skb, len); | |
1da177e4 | 1170 | |
eeeb0374 | 1171 | rc = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len); |
1da177e4 LT |
1172 | if (rc) |
1173 | goto out_kfree_skb; | |
1174 | ||
1175 | /* | |
1176 | * If the Q BIT Include socket option is in force, the first | |
1177 | * byte of the user data is the logical value of the Q Bit. | |
1178 | */ | |
cb863ffd | 1179 | if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) { |
cb101ed2 MD |
1180 | if (!pskb_may_pull(skb, 1)) |
1181 | goto out_kfree_skb; | |
1182 | ||
1da177e4 LT |
1183 | qbit = skb->data[0]; |
1184 | skb_pull(skb, 1); | |
1185 | } | |
1186 | ||
1187 | /* | |
1188 | * Push down the X.25 header | |
1189 | */ | |
1190 | SOCK_DEBUG(sk, "x25_sendmsg: Building X.25 Header.\n"); | |
1191 | ||
1192 | if (msg->msg_flags & MSG_OOB) { | |
1193 | if (x25->neighbour->extended) { | |
1194 | asmptr = skb_push(skb, X25_STD_MIN_LEN); | |
1195 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ; | |
1196 | *asmptr++ = (x25->lci >> 0) & 0xFF; | |
1197 | *asmptr++ = X25_INTERRUPT; | |
1198 | } else { | |
1199 | asmptr = skb_push(skb, X25_STD_MIN_LEN); | |
1200 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ; | |
1201 | *asmptr++ = (x25->lci >> 0) & 0xFF; | |
1202 | *asmptr++ = X25_INTERRUPT; | |
1203 | } | |
1204 | } else { | |
1205 | if (x25->neighbour->extended) { | |
1206 | /* Build an Extended X.25 header */ | |
1207 | asmptr = skb_push(skb, X25_EXT_MIN_LEN); | |
1208 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ; | |
1209 | *asmptr++ = (x25->lci >> 0) & 0xFF; | |
1210 | *asmptr++ = X25_DATA; | |
1211 | *asmptr++ = X25_DATA; | |
1212 | } else { | |
1213 | /* Build an Standard X.25 header */ | |
1214 | asmptr = skb_push(skb, X25_STD_MIN_LEN); | |
1215 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ; | |
1216 | *asmptr++ = (x25->lci >> 0) & 0xFF; | |
1217 | *asmptr++ = X25_DATA; | |
1218 | } | |
1219 | ||
1220 | if (qbit) | |
1221 | skb->data[0] |= X25_Q_BIT; | |
1222 | } | |
1223 | ||
1224 | SOCK_DEBUG(sk, "x25_sendmsg: Built header.\n"); | |
1225 | SOCK_DEBUG(sk, "x25_sendmsg: Transmitting buffer\n"); | |
1226 | ||
1227 | rc = -ENOTCONN; | |
1228 | if (sk->sk_state != TCP_ESTABLISHED) | |
1229 | goto out_kfree_skb; | |
1230 | ||
1231 | if (msg->msg_flags & MSG_OOB) | |
1232 | skb_queue_tail(&x25->interrupt_out_queue, skb); | |
1233 | else { | |
8db09f26 RK |
1234 | rc = x25_output(sk, skb); |
1235 | len = rc; | |
1236 | if (rc < 0) | |
1da177e4 | 1237 | kfree_skb(skb); |
cb863ffd | 1238 | else if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) |
1da177e4 LT |
1239 | len++; |
1240 | } | |
1241 | ||
1da177e4 | 1242 | x25_kick(sk); |
1da177e4 LT |
1243 | rc = len; |
1244 | out: | |
77b22836 | 1245 | release_sock(sk); |
1da177e4 LT |
1246 | return rc; |
1247 | out_kfree_skb: | |
1248 | kfree_skb(skb); | |
1249 | goto out; | |
1250 | } | |
1251 | ||
1252 | ||
1253 | static int x25_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1254 | struct msghdr *msg, size_t size, | |
1255 | int flags) | |
1256 | { | |
1257 | struct sock *sk = sock->sk; | |
1258 | struct x25_sock *x25 = x25_sk(sk); | |
1259 | struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name; | |
1260 | size_t copied; | |
501e89d3 | 1261 | int qbit, header_len; |
1da177e4 LT |
1262 | struct sk_buff *skb; |
1263 | unsigned char *asmptr; | |
1264 | int rc = -ENOTCONN; | |
1265 | ||
77b22836 | 1266 | lock_sock(sk); |
501e89d3 DJ |
1267 | |
1268 | if (x25->neighbour == NULL) | |
1269 | goto out; | |
1270 | ||
1271 | header_len = x25->neighbour->extended ? | |
1272 | X25_EXT_MIN_LEN : X25_STD_MIN_LEN; | |
1273 | ||
1da177e4 LT |
1274 | /* |
1275 | * This works for seqpacket too. The receiver has ordered the queue for | |
1276 | * us! We do one quick check first though | |
1277 | */ | |
1278 | if (sk->sk_state != TCP_ESTABLISHED) | |
1279 | goto out; | |
1280 | ||
1281 | if (flags & MSG_OOB) { | |
1282 | rc = -EINVAL; | |
1283 | if (sock_flag(sk, SOCK_URGINLINE) || | |
1284 | !skb_peek(&x25->interrupt_in_queue)) | |
1285 | goto out; | |
1286 | ||
1287 | skb = skb_dequeue(&x25->interrupt_in_queue); | |
1288 | ||
cb101ed2 MD |
1289 | if (!pskb_may_pull(skb, X25_STD_MIN_LEN)) |
1290 | goto out_free_dgram; | |
1291 | ||
1da177e4 LT |
1292 | skb_pull(skb, X25_STD_MIN_LEN); |
1293 | ||
1294 | /* | |
1295 | * No Q bit information on Interrupt data. | |
1296 | */ | |
cb863ffd | 1297 | if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) { |
1da177e4 LT |
1298 | asmptr = skb_push(skb, 1); |
1299 | *asmptr = 0x00; | |
1300 | } | |
1301 | ||
1302 | msg->msg_flags |= MSG_OOB; | |
1303 | } else { | |
1304 | /* Now we can treat all alike */ | |
77b22836 | 1305 | release_sock(sk); |
1da177e4 LT |
1306 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, |
1307 | flags & MSG_DONTWAIT, &rc); | |
77b22836 | 1308 | lock_sock(sk); |
1da177e4 LT |
1309 | if (!skb) |
1310 | goto out; | |
1311 | ||
cb101ed2 MD |
1312 | if (!pskb_may_pull(skb, header_len)) |
1313 | goto out_free_dgram; | |
1314 | ||
1da177e4 LT |
1315 | qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT; |
1316 | ||
cb101ed2 | 1317 | skb_pull(skb, header_len); |
1da177e4 | 1318 | |
cb863ffd | 1319 | if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) { |
1da177e4 LT |
1320 | asmptr = skb_push(skb, 1); |
1321 | *asmptr = qbit; | |
1322 | } | |
1323 | } | |
1324 | ||
badff6d0 | 1325 | skb_reset_transport_header(skb); |
1da177e4 LT |
1326 | copied = skb->len; |
1327 | ||
1328 | if (copied > size) { | |
1329 | copied = size; | |
1330 | msg->msg_flags |= MSG_TRUNC; | |
1331 | } | |
1332 | ||
f8e1d201 | 1333 | /* Currently, each datagram always contains a complete record */ |
1da177e4 LT |
1334 | msg->msg_flags |= MSG_EOR; |
1335 | ||
1336 | rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
1337 | if (rc) | |
1338 | goto out_free_dgram; | |
1339 | ||
1340 | if (sx25) { | |
1341 | sx25->sx25_family = AF_X25; | |
1342 | sx25->sx25_addr = x25->dest_addr; | |
1343 | } | |
1344 | ||
1345 | msg->msg_namelen = sizeof(struct sockaddr_x25); | |
1346 | ||
1da177e4 | 1347 | x25_check_rbuf(sk); |
1da177e4 LT |
1348 | rc = copied; |
1349 | out_free_dgram: | |
1350 | skb_free_datagram(sk, skb); | |
1351 | out: | |
77b22836 | 1352 | release_sock(sk); |
1da177e4 LT |
1353 | return rc; |
1354 | } | |
1355 | ||
1356 | ||
1357 | static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1358 | { | |
1359 | struct sock *sk = sock->sk; | |
1360 | struct x25_sock *x25 = x25_sk(sk); | |
1361 | void __user *argp = (void __user *)arg; | |
1362 | int rc; | |
1363 | ||
1364 | switch (cmd) { | |
fddc5f3e JP |
1365 | case TIOCOUTQ: { |
1366 | int amount; | |
1367 | ||
1368 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); | |
1369 | if (amount < 0) | |
1370 | amount = 0; | |
1371 | rc = put_user(amount, (unsigned int __user *)argp); | |
1372 | break; | |
1373 | } | |
1da177e4 | 1374 | |
fddc5f3e JP |
1375 | case TIOCINQ: { |
1376 | struct sk_buff *skb; | |
1377 | int amount = 0; | |
1378 | /* | |
1379 | * These two are safe on a single CPU system as | |
1380 | * only user tasks fiddle here | |
1381 | */ | |
1382 | lock_sock(sk); | |
1383 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) | |
1384 | amount = skb->len; | |
1385 | release_sock(sk); | |
1386 | rc = put_user(amount, (unsigned int __user *)argp); | |
1387 | break; | |
1388 | } | |
1da177e4 | 1389 | |
fddc5f3e JP |
1390 | case SIOCGSTAMP: |
1391 | rc = -EINVAL; | |
1392 | if (sk) | |
1393 | rc = sock_get_timestamp(sk, | |
f8e1d201 | 1394 | (struct timeval __user *)argp); |
fddc5f3e JP |
1395 | break; |
1396 | case SIOCGSTAMPNS: | |
1397 | rc = -EINVAL; | |
1398 | if (sk) | |
1399 | rc = sock_get_timestampns(sk, | |
1400 | (struct timespec __user *)argp); | |
1401 | break; | |
1402 | case SIOCGIFADDR: | |
1403 | case SIOCSIFADDR: | |
1404 | case SIOCGIFDSTADDR: | |
1405 | case SIOCSIFDSTADDR: | |
1406 | case SIOCGIFBRDADDR: | |
1407 | case SIOCSIFBRDADDR: | |
1408 | case SIOCGIFNETMASK: | |
1409 | case SIOCSIFNETMASK: | |
1410 | case SIOCGIFMETRIC: | |
1411 | case SIOCSIFMETRIC: | |
1412 | rc = -EINVAL; | |
1413 | break; | |
1414 | case SIOCADDRT: | |
1415 | case SIOCDELRT: | |
1416 | rc = -EPERM; | |
1417 | if (!capable(CAP_NET_ADMIN)) | |
1da177e4 | 1418 | break; |
fddc5f3e JP |
1419 | rc = x25_route_ioctl(cmd, argp); |
1420 | break; | |
1421 | case SIOCX25GSUBSCRIP: | |
1422 | rc = x25_subscr_ioctl(cmd, argp); | |
1423 | break; | |
1424 | case SIOCX25SSUBSCRIP: | |
1425 | rc = -EPERM; | |
1426 | if (!capable(CAP_NET_ADMIN)) | |
1da177e4 | 1427 | break; |
fddc5f3e JP |
1428 | rc = x25_subscr_ioctl(cmd, argp); |
1429 | break; | |
1430 | case SIOCX25GFACILITIES: { | |
1431 | lock_sock(sk); | |
1432 | rc = copy_to_user(argp, &x25->facilities, | |
1433 | sizeof(x25->facilities)) | |
1434 | ? -EFAULT : 0; | |
1435 | release_sock(sk); | |
1436 | break; | |
1437 | } | |
1da177e4 | 1438 | |
fddc5f3e JP |
1439 | case SIOCX25SFACILITIES: { |
1440 | struct x25_facilities facilities; | |
1441 | rc = -EFAULT; | |
1442 | if (copy_from_user(&facilities, argp, sizeof(facilities))) | |
1443 | break; | |
1444 | rc = -EINVAL; | |
1445 | lock_sock(sk); | |
1446 | if (sk->sk_state != TCP_LISTEN && | |
1447 | sk->sk_state != TCP_CLOSE) | |
1448 | goto out_fac_release; | |
1449 | if (facilities.pacsize_in < X25_PS16 || | |
1450 | facilities.pacsize_in > X25_PS4096) | |
1451 | goto out_fac_release; | |
1452 | if (facilities.pacsize_out < X25_PS16 || | |
1453 | facilities.pacsize_out > X25_PS4096) | |
1454 | goto out_fac_release; | |
1455 | if (facilities.winsize_in < 1 || | |
1456 | facilities.winsize_in > 127) | |
1457 | goto out_fac_release; | |
1458 | if (facilities.throughput) { | |
1459 | int out = facilities.throughput & 0xf0; | |
1460 | int in = facilities.throughput & 0x0f; | |
1461 | if (!out) | |
1462 | facilities.throughput |= | |
1463 | X25_DEFAULT_THROUGHPUT << 4; | |
1464 | else if (out < 0x30 || out > 0xD0) | |
f90de660 | 1465 | goto out_fac_release; |
fddc5f3e JP |
1466 | if (!in) |
1467 | facilities.throughput |= | |
1468 | X25_DEFAULT_THROUGHPUT; | |
1469 | else if (in < 0x03 || in > 0x0D) | |
f90de660 | 1470 | goto out_fac_release; |
f8e1d201 | 1471 | } |
fddc5f3e JP |
1472 | if (facilities.reverse && |
1473 | (facilities.reverse & 0x81) != 0x81) | |
1474 | goto out_fac_release; | |
1475 | x25->facilities = facilities; | |
1476 | rc = 0; | |
1477 | out_fac_release: | |
1478 | release_sock(sk); | |
1479 | break; | |
1480 | } | |
a64b7b93 | 1481 | |
fddc5f3e JP |
1482 | case SIOCX25GDTEFACILITIES: { |
1483 | lock_sock(sk); | |
1484 | rc = copy_to_user(argp, &x25->dte_facilities, | |
1485 | sizeof(x25->dte_facilities)); | |
1486 | release_sock(sk); | |
1487 | if (rc) | |
f8e1d201 | 1488 | rc = -EFAULT; |
fddc5f3e JP |
1489 | break; |
1490 | } | |
a64b7b93 | 1491 | |
fddc5f3e JP |
1492 | case SIOCX25SDTEFACILITIES: { |
1493 | struct x25_dte_facilities dtefacs; | |
1494 | rc = -EFAULT; | |
1495 | if (copy_from_user(&dtefacs, argp, sizeof(dtefacs))) | |
1da177e4 | 1496 | break; |
fddc5f3e JP |
1497 | rc = -EINVAL; |
1498 | lock_sock(sk); | |
1499 | if (sk->sk_state != TCP_LISTEN && | |
1500 | sk->sk_state != TCP_CLOSE) | |
1501 | goto out_dtefac_release; | |
1502 | if (dtefacs.calling_len > X25_MAX_AE_LEN) | |
1503 | goto out_dtefac_release; | |
1504 | if (dtefacs.calling_ae == NULL) | |
1505 | goto out_dtefac_release; | |
1506 | if (dtefacs.called_len > X25_MAX_AE_LEN) | |
1507 | goto out_dtefac_release; | |
1508 | if (dtefacs.called_ae == NULL) | |
1509 | goto out_dtefac_release; | |
1510 | x25->dte_facilities = dtefacs; | |
1511 | rc = 0; | |
1512 | out_dtefac_release: | |
1513 | release_sock(sk); | |
1514 | break; | |
1515 | } | |
1da177e4 | 1516 | |
fddc5f3e JP |
1517 | case SIOCX25GCALLUSERDATA: { |
1518 | lock_sock(sk); | |
1519 | rc = copy_to_user(argp, &x25->calluserdata, | |
1520 | sizeof(x25->calluserdata)) | |
1521 | ? -EFAULT : 0; | |
1522 | release_sock(sk); | |
1523 | break; | |
1524 | } | |
1da177e4 | 1525 | |
fddc5f3e JP |
1526 | case SIOCX25SCALLUSERDATA: { |
1527 | struct x25_calluserdata calluserdata; | |
1da177e4 | 1528 | |
fddc5f3e JP |
1529 | rc = -EFAULT; |
1530 | if (copy_from_user(&calluserdata, argp, sizeof(calluserdata))) | |
1da177e4 | 1531 | break; |
fddc5f3e JP |
1532 | rc = -EINVAL; |
1533 | if (calluserdata.cudlength > X25_MAX_CUD_LEN) | |
1534 | break; | |
1535 | lock_sock(sk); | |
1536 | x25->calluserdata = calluserdata; | |
1537 | release_sock(sk); | |
1538 | rc = 0; | |
1539 | break; | |
1540 | } | |
1da177e4 | 1541 | |
fddc5f3e JP |
1542 | case SIOCX25GCAUSEDIAG: { |
1543 | lock_sock(sk); | |
1544 | rc = copy_to_user(argp, &x25->causediag, sizeof(x25->causediag)) | |
1545 | ? -EFAULT : 0; | |
1546 | release_sock(sk); | |
1547 | break; | |
1548 | } | |
1549 | ||
1550 | case SIOCX25SCAUSEDIAG: { | |
1551 | struct x25_causediag causediag; | |
1552 | rc = -EFAULT; | |
1553 | if (copy_from_user(&causediag, argp, sizeof(causediag))) | |
386e50cc | 1554 | break; |
fddc5f3e JP |
1555 | lock_sock(sk); |
1556 | x25->causediag = causediag; | |
1557 | release_sock(sk); | |
1558 | rc = 0; | |
1559 | break; | |
386e50cc | 1560 | |
fddc5f3e | 1561 | } |
386e50cc | 1562 | |
fddc5f3e JP |
1563 | case SIOCX25SCUDMATCHLEN: { |
1564 | struct x25_subaddr sub_addr; | |
1565 | rc = -EINVAL; | |
1566 | lock_sock(sk); | |
1567 | if(sk->sk_state != TCP_CLOSE) | |
1568 | goto out_cud_release; | |
1569 | rc = -EFAULT; | |
1570 | if (copy_from_user(&sub_addr, argp, | |
1571 | sizeof(sub_addr))) | |
1572 | goto out_cud_release; | |
1573 | rc = -EINVAL; | |
1574 | if (sub_addr.cudmatchlength > X25_MAX_CUD_LEN) | |
1575 | goto out_cud_release; | |
1576 | x25->cudmatchlength = sub_addr.cudmatchlength; | |
1577 | rc = 0; | |
3f0a069a | 1578 | out_cud_release: |
fddc5f3e JP |
1579 | release_sock(sk); |
1580 | break; | |
1581 | } | |
cb65d506 | 1582 | |
fddc5f3e JP |
1583 | case SIOCX25CALLACCPTAPPRV: { |
1584 | rc = -EINVAL; | |
1585 | lock_sock(sk); | |
1586 | if (sk->sk_state != TCP_CLOSE) | |
ebc3f64b | 1587 | break; |
fddc5f3e JP |
1588 | clear_bit(X25_ACCPT_APPRV_FLAG, &x25->flags); |
1589 | release_sock(sk); | |
1590 | rc = 0; | |
1591 | break; | |
1592 | } | |
ebc3f64b | 1593 | |
fddc5f3e JP |
1594 | case SIOCX25SENDCALLACCPT: { |
1595 | rc = -EINVAL; | |
1596 | lock_sock(sk); | |
1597 | if (sk->sk_state != TCP_ESTABLISHED) | |
ebc3f64b | 1598 | break; |
fddc5f3e JP |
1599 | /* must call accptapprv above */ |
1600 | if (test_bit(X25_ACCPT_APPRV_FLAG, &x25->flags)) | |
1da177e4 | 1601 | break; |
fddc5f3e JP |
1602 | x25_write_internal(sk, X25_CALL_ACCEPTED); |
1603 | x25->state = X25_STATE_3; | |
1604 | release_sock(sk); | |
1605 | rc = 0; | |
1606 | break; | |
1607 | } | |
1608 | ||
1609 | default: | |
1610 | rc = -ENOIOCTLCMD; | |
1611 | break; | |
1da177e4 LT |
1612 | } |
1613 | ||
1614 | return rc; | |
1615 | } | |
1616 | ||
ec1b4cf7 | 1617 | static const struct net_proto_family x25_family_ops = { |
1da177e4 LT |
1618 | .family = AF_X25, |
1619 | .create = x25_create, | |
1620 | .owner = THIS_MODULE, | |
1621 | }; | |
1622 | ||
1b06e6ba SP |
1623 | #ifdef CONFIG_COMPAT |
1624 | static int compat_x25_subscr_ioctl(unsigned int cmd, | |
1625 | struct compat_x25_subscrip_struct __user *x25_subscr32) | |
1626 | { | |
1627 | struct compat_x25_subscrip_struct x25_subscr; | |
1628 | struct x25_neigh *nb; | |
1629 | struct net_device *dev; | |
1630 | int rc = -EINVAL; | |
1631 | ||
1632 | rc = -EFAULT; | |
1633 | if (copy_from_user(&x25_subscr, x25_subscr32, sizeof(*x25_subscr32))) | |
1634 | goto out; | |
1635 | ||
1636 | rc = -EINVAL; | |
1637 | dev = x25_dev_get(x25_subscr.device); | |
1638 | if (dev == NULL) | |
1639 | goto out; | |
1640 | ||
1641 | nb = x25_get_neigh(dev); | |
1642 | if (nb == NULL) | |
1643 | goto out_dev_put; | |
1644 | ||
1645 | dev_put(dev); | |
1646 | ||
1647 | if (cmd == SIOCX25GSUBSCRIP) { | |
5595a1a5 | 1648 | read_lock_bh(&x25_neigh_list_lock); |
1b06e6ba SP |
1649 | x25_subscr.extended = nb->extended; |
1650 | x25_subscr.global_facil_mask = nb->global_facil_mask; | |
5595a1a5 | 1651 | read_unlock_bh(&x25_neigh_list_lock); |
1b06e6ba SP |
1652 | rc = copy_to_user(x25_subscr32, &x25_subscr, |
1653 | sizeof(*x25_subscr32)) ? -EFAULT : 0; | |
1654 | } else { | |
1655 | rc = -EINVAL; | |
1656 | if (x25_subscr.extended == 0 || x25_subscr.extended == 1) { | |
1657 | rc = 0; | |
5595a1a5 | 1658 | write_lock_bh(&x25_neigh_list_lock); |
1b06e6ba SP |
1659 | nb->extended = x25_subscr.extended; |
1660 | nb->global_facil_mask = x25_subscr.global_facil_mask; | |
5595a1a5 | 1661 | write_unlock_bh(&x25_neigh_list_lock); |
1b06e6ba SP |
1662 | } |
1663 | } | |
1664 | x25_neigh_put(nb); | |
1665 | out: | |
1666 | return rc; | |
1667 | out_dev_put: | |
1668 | dev_put(dev); | |
1669 | goto out; | |
1670 | } | |
1671 | ||
1672 | static int compat_x25_ioctl(struct socket *sock, unsigned int cmd, | |
1673 | unsigned long arg) | |
1674 | { | |
1675 | void __user *argp = compat_ptr(arg); | |
1676 | struct sock *sk = sock->sk; | |
1677 | ||
1678 | int rc = -ENOIOCTLCMD; | |
1679 | ||
1680 | switch(cmd) { | |
1681 | case TIOCOUTQ: | |
1682 | case TIOCINQ: | |
1683 | rc = x25_ioctl(sock, cmd, (unsigned long)argp); | |
1684 | break; | |
1685 | case SIOCGSTAMP: | |
1686 | rc = -EINVAL; | |
1687 | if (sk) | |
1688 | rc = compat_sock_get_timestamp(sk, | |
1689 | (struct timeval __user*)argp); | |
1690 | break; | |
ae40eb1e ED |
1691 | case SIOCGSTAMPNS: |
1692 | rc = -EINVAL; | |
1693 | if (sk) | |
1694 | rc = compat_sock_get_timestampns(sk, | |
1695 | (struct timespec __user*)argp); | |
1696 | break; | |
1b06e6ba SP |
1697 | case SIOCGIFADDR: |
1698 | case SIOCSIFADDR: | |
1699 | case SIOCGIFDSTADDR: | |
1700 | case SIOCSIFDSTADDR: | |
1701 | case SIOCGIFBRDADDR: | |
1702 | case SIOCSIFBRDADDR: | |
1703 | case SIOCGIFNETMASK: | |
1704 | case SIOCSIFNETMASK: | |
1705 | case SIOCGIFMETRIC: | |
1706 | case SIOCSIFMETRIC: | |
1707 | rc = -EINVAL; | |
1708 | break; | |
1709 | case SIOCADDRT: | |
1710 | case SIOCDELRT: | |
1711 | rc = -EPERM; | |
1712 | if (!capable(CAP_NET_ADMIN)) | |
1713 | break; | |
1714 | rc = x25_route_ioctl(cmd, argp); | |
1715 | break; | |
1716 | case SIOCX25GSUBSCRIP: | |
1717 | rc = compat_x25_subscr_ioctl(cmd, argp); | |
1718 | break; | |
1719 | case SIOCX25SSUBSCRIP: | |
1720 | rc = -EPERM; | |
1721 | if (!capable(CAP_NET_ADMIN)) | |
1722 | break; | |
1723 | rc = compat_x25_subscr_ioctl(cmd, argp); | |
1724 | break; | |
1725 | case SIOCX25GFACILITIES: | |
1726 | case SIOCX25SFACILITIES: | |
9a6b9f2e SP |
1727 | case SIOCX25GDTEFACILITIES: |
1728 | case SIOCX25SDTEFACILITIES: | |
1b06e6ba SP |
1729 | case SIOCX25GCALLUSERDATA: |
1730 | case SIOCX25SCALLUSERDATA: | |
1731 | case SIOCX25GCAUSEDIAG: | |
386e50cc | 1732 | case SIOCX25SCAUSEDIAG: |
1b06e6ba SP |
1733 | case SIOCX25SCUDMATCHLEN: |
1734 | case SIOCX25CALLACCPTAPPRV: | |
1735 | case SIOCX25SENDCALLACCPT: | |
1736 | rc = x25_ioctl(sock, cmd, (unsigned long)argp); | |
1737 | break; | |
1738 | default: | |
1739 | rc = -ENOIOCTLCMD; | |
1740 | break; | |
1741 | } | |
1742 | return rc; | |
1743 | } | |
1744 | #endif | |
1745 | ||
91774904 | 1746 | static const struct proto_ops x25_proto_ops = { |
1da177e4 LT |
1747 | .family = AF_X25, |
1748 | .owner = THIS_MODULE, | |
1749 | .release = x25_release, | |
1750 | .bind = x25_bind, | |
1751 | .connect = x25_connect, | |
1752 | .socketpair = sock_no_socketpair, | |
1753 | .accept = x25_accept, | |
1754 | .getname = x25_getname, | |
768190fd | 1755 | .poll = datagram_poll, |
1da177e4 | 1756 | .ioctl = x25_ioctl, |
1b06e6ba SP |
1757 | #ifdef CONFIG_COMPAT |
1758 | .compat_ioctl = compat_x25_ioctl, | |
1759 | #endif | |
1da177e4 LT |
1760 | .listen = x25_listen, |
1761 | .shutdown = sock_no_shutdown, | |
1762 | .setsockopt = x25_setsockopt, | |
1763 | .getsockopt = x25_getsockopt, | |
1764 | .sendmsg = x25_sendmsg, | |
1765 | .recvmsg = x25_recvmsg, | |
1766 | .mmap = sock_no_mmap, | |
1767 | .sendpage = sock_no_sendpage, | |
1768 | }; | |
1769 | ||
7546dd97 | 1770 | static struct packet_type x25_packet_type __read_mostly = { |
09640e63 | 1771 | .type = cpu_to_be16(ETH_P_X25), |
1da177e4 LT |
1772 | .func = x25_lapb_receive_frame, |
1773 | }; | |
1774 | ||
1775 | static struct notifier_block x25_dev_notifier = { | |
1776 | .notifier_call = x25_device_event, | |
1777 | }; | |
1778 | ||
1779 | void x25_kill_by_neigh(struct x25_neigh *nb) | |
1780 | { | |
1781 | struct sock *s; | |
1da177e4 LT |
1782 | |
1783 | write_lock_bh(&x25_list_lock); | |
1784 | ||
b67bfe0d | 1785 | sk_for_each(s, &x25_list) |
1da177e4 LT |
1786 | if (x25_sk(s)->neighbour == nb) |
1787 | x25_disconnect(s, ENETUNREACH, 0, 0); | |
1788 | ||
1789 | write_unlock_bh(&x25_list_lock); | |
95a9dc43 AH |
1790 | |
1791 | /* Remove any related forwards */ | |
1792 | x25_clear_forward_by_dev(nb->dev); | |
1da177e4 LT |
1793 | } |
1794 | ||
1795 | static int __init x25_init(void) | |
1796 | { | |
1797 | int rc = proto_register(&x25_proto, 0); | |
1798 | ||
1799 | if (rc != 0) | |
1800 | goto out; | |
1801 | ||
1fd975a0 | 1802 | rc = sock_register(&x25_family_ops); |
1803 | if (rc != 0) | |
1804 | goto out_proto; | |
1da177e4 LT |
1805 | |
1806 | dev_add_pack(&x25_packet_type); | |
1807 | ||
1fd975a0 | 1808 | rc = register_netdevice_notifier(&x25_dev_notifier); |
1809 | if (rc != 0) | |
1810 | goto out_sock; | |
1da177e4 | 1811 | |
a44562e4 | 1812 | printk(KERN_INFO "X.25 for Linux Version 0.2\n"); |
1da177e4 | 1813 | |
1da177e4 | 1814 | x25_register_sysctl(); |
1fd975a0 | 1815 | rc = x25_proc_init(); |
1816 | if (rc != 0) | |
1817 | goto out_dev; | |
1da177e4 LT |
1818 | out: |
1819 | return rc; | |
1fd975a0 | 1820 | out_dev: |
1821 | unregister_netdevice_notifier(&x25_dev_notifier); | |
1822 | out_sock: | |
1823 | sock_unregister(AF_X25); | |
1824 | out_proto: | |
1825 | proto_unregister(&x25_proto); | |
1826 | goto out; | |
1da177e4 LT |
1827 | } |
1828 | module_init(x25_init); | |
1829 | ||
1830 | static void __exit x25_exit(void) | |
1831 | { | |
1832 | x25_proc_exit(); | |
1833 | x25_link_free(); | |
1834 | x25_route_free(); | |
1835 | ||
1da177e4 | 1836 | x25_unregister_sysctl(); |
1da177e4 LT |
1837 | |
1838 | unregister_netdevice_notifier(&x25_dev_notifier); | |
1839 | ||
1840 | dev_remove_pack(&x25_packet_type); | |
1841 | ||
1842 | sock_unregister(AF_X25); | |
1843 | proto_unregister(&x25_proto); | |
1844 | } | |
1845 | module_exit(x25_exit); | |
1846 | ||
1847 | MODULE_AUTHOR("Jonathan Naylor <g4klx@g4klx.demon.co.uk>"); | |
1848 | MODULE_DESCRIPTION("The X.25 Packet Layer network layer protocol"); | |
1849 | MODULE_LICENSE("GPL"); | |
1850 | MODULE_ALIAS_NETPROTO(PF_X25); |