blob: d30615419b4d77c1c375302f28c64034144b9385 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
YOSHIFUJI Hideakif8e1d2012007-02-09 23:25:27 +09006 * screw up. It might even work.
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 *
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.
YOSHIFUJI Hideakif8e1d2012007-02-09 23:25:27 +090021 * 2000-03-22 Daniela Squassoni Allowed disabling/enabling of
22 * facilities negotiation and increased
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 * the throughput upper limit.
24 * 2000-08-27 Arnaldo C. Melo s/suser/capable/ + micro cleanups
YOSHIFUJI Hideakif8e1d2012007-02-09 23:25:27 +090025 * 2000-09-04 Henner Eisen Set sock->state in x25_accept().
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 * 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
Shaun Pereiracb65d502005-06-22 22:15:01 -070032 * 2005-04-02 Shaun Pereira Selective sub address matching
33 * with call user data
Shaun Pereiraebc3f642005-06-22 22:16:17 -070034 * 2005-04-15 Shaun Pereira Fast select with no restriction on
35 * response
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 */
37
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <linux/module.h>
Randy Dunlap4fc268d2006-01-11 12:17:47 -080039#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090049#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#include <net/sock.h>
Arnaldo Carvalho de Meloc752f072005-08-09 20:08:28 -070051#include <net/tcp_states.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#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>
Shaun Pereira1b06e6b2006-03-22 00:00:12 -080057#include <linux/compat.h>
andrew hendrya9288522010-02-14 02:00:45 +000058#include <linux/ctype.h>
Shaun Pereira1b06e6b2006-03-22 00:00:12 -080059
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#include <net/x25.h>
Shaun Pereira1b06e6b2006-03-22 00:00:12 -080061#include <net/compat.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
63int sysctl_x25_restart_request_timeout = X25_DEFAULT_T20;
64int sysctl_x25_call_request_timeout = X25_DEFAULT_T21;
65int sysctl_x25_reset_request_timeout = X25_DEFAULT_T22;
66int sysctl_x25_clear_request_timeout = X25_DEFAULT_T23;
67int sysctl_x25_ack_holdback_timeout = X25_DEFAULT_T2;
Andrew Hendry39e21c02007-02-08 13:34:36 -080068int sysctl_x25_forward = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
70HLIST_HEAD(x25_list);
71DEFINE_RWLOCK(x25_list_lock);
72
Eric Dumazet90ddc4f2005-12-22 12:49:22 -080073static const struct proto_ops x25_proto_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
75static struct x25_address null_x25_address = {" "};
76
Shaun Pereira1b06e6b2006-03-22 00:00:12 -080077#ifdef CONFIG_COMPAT
78struct 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
John Hughesf5eb9172010-04-07 21:29:25 -070085
86int 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
94 if (skb->len < 1) {
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
103 if (skb->len < needed) {
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
112empty:
113 *called_addr->x25_addr = 0;
114 *calling_addr->x25_addr = 0;
115
116 return rc;
117}
118
119
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120int x25_addr_ntoa(unsigned char *p, struct x25_address *called_addr,
121 struct x25_address *calling_addr)
122{
Eric Dumazet6bf15742008-01-13 22:27:52 -0800123 unsigned int called_len, calling_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 char *called, *calling;
Eric Dumazet6bf15742008-01-13 22:27:52 -0800125 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
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
157int 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 */
198static 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 */
208static void x25_kill_by_device(struct net_device *dev)
209{
210 struct sock *s;
211 struct hlist_node *node;
212
213 write_lock_bh(&x25_list_lock);
214
215 sk_for_each(s, node, &x25_list)
216 if (x25_sk(s)->neighbour && x25_sk(s)->neighbour->dev == dev)
217 x25_disconnect(s, ENETUNREACH, 0, 0);
218
219 write_unlock_bh(&x25_list_lock);
220}
221
222/*
223 * Handle device status changes.
224 */
225static int x25_device_event(struct notifier_block *this, unsigned long event,
226 void *ptr)
227{
228 struct net_device *dev = ptr;
229 struct x25_neigh *nb;
230
YOSHIFUJI Hideaki721499e2008-07-19 22:34:43 -0700231 if (!net_eq(dev_net(dev), &init_net))
Eric W. Biedermane9dc8652007-09-12 13:02:17 +0200232 return NOTIFY_DONE;
233
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 if (dev->type == ARPHRD_X25
235#if defined(CONFIG_LLC) || defined(CONFIG_LLC_MODULE)
236 || dev->type == ARPHRD_ETHER
237#endif
238 ) {
239 switch (event) {
Joe Perchesfddc5f32011-07-01 09:43:13 +0000240 case NETDEV_UP:
241 x25_link_device_up(dev);
242 break;
243 case NETDEV_GOING_DOWN:
244 nb = x25_get_neigh(dev);
245 if (nb) {
246 x25_terminate_link(nb);
247 x25_neigh_put(nb);
248 }
249 break;
250 case NETDEV_DOWN:
251 x25_kill_by_device(dev);
252 x25_route_device_down(dev);
253 x25_link_device_down(dev);
254 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 }
256 }
257
258 return NOTIFY_DONE;
259}
260
261/*
262 * Add a socket to the bound sockets list.
263 */
264static void x25_insert_socket(struct sock *sk)
265{
266 write_lock_bh(&x25_list_lock);
267 sk_add_node(sk, &x25_list);
268 write_unlock_bh(&x25_list_lock);
269}
270
271/*
272 * Find a socket that wants to accept the Call Request we just
273 * received. Check the full list for an address/cud match.
274 * If no cuds match return the next_best thing, an address match.
275 * Note: if a listening socket has cud set it must only get calls
276 * with matching cud.
277 */
Shaun Pereiracb65d502005-06-22 22:15:01 -0700278static struct sock *x25_find_listener(struct x25_address *addr,
279 struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280{
281 struct sock *s;
282 struct sock *next_best;
283 struct hlist_node *node;
284
285 read_lock_bh(&x25_list_lock);
286 next_best = NULL;
287
288 sk_for_each(s, node, &x25_list)
289 if ((!strcmp(addr->x25_addr,
Shaun Pereiracb65d502005-06-22 22:15:01 -0700290 x25_sk(s)->source_addr.x25_addr) ||
291 !strcmp(addr->x25_addr,
292 null_x25_address.x25_addr)) &&
293 s->sk_state == TCP_LISTEN) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 /*
295 * Found a listening socket, now check the incoming
296 * call user data vs this sockets call user data
297 */
Shaun Pereiracb65d502005-06-22 22:15:01 -0700298 if(skb->len > 0 && x25_sk(s)->cudmatchlength > 0) {
YOSHIFUJI Hideakif8e1d2012007-02-09 23:25:27 +0900299 if((memcmp(x25_sk(s)->calluserdata.cuddata,
300 skb->data,
Shaun Pereiracb65d502005-06-22 22:15:01 -0700301 x25_sk(s)->cudmatchlength)) == 0) {
302 sock_hold(s);
303 goto found;
304 }
305 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 next_best = s;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 }
308 if (next_best) {
309 s = next_best;
310 sock_hold(s);
311 goto found;
312 }
313 s = NULL;
314found:
315 read_unlock_bh(&x25_list_lock);
316 return s;
317}
318
319/*
320 * Find a connected X.25 socket given my LCI and neighbour.
321 */
322static struct sock *__x25_find_socket(unsigned int lci, struct x25_neigh *nb)
323{
324 struct sock *s;
325 struct hlist_node *node;
326
327 sk_for_each(s, node, &x25_list)
328 if (x25_sk(s)->lci == lci && x25_sk(s)->neighbour == nb) {
329 sock_hold(s);
330 goto found;
331 }
332 s = NULL;
333found:
334 return s;
335}
336
337struct sock *x25_find_socket(unsigned int lci, struct x25_neigh *nb)
338{
339 struct sock *s;
340
341 read_lock_bh(&x25_list_lock);
342 s = __x25_find_socket(lci, nb);
343 read_unlock_bh(&x25_list_lock);
344 return s;
345}
346
347/*
348 * Find a unique LCI for a given device.
349 */
350static unsigned int x25_new_lci(struct x25_neigh *nb)
351{
352 unsigned int lci = 1;
353 struct sock *sk;
354
355 read_lock_bh(&x25_list_lock);
356
357 while ((sk = __x25_find_socket(lci, nb)) != NULL) {
358 sock_put(sk);
359 if (++lci == 4096) {
360 lci = 0;
361 break;
362 }
363 }
364
365 read_unlock_bh(&x25_list_lock);
366 return lci;
367}
368
369/*
370 * Deferred destroy.
371 */
David S. Miller14ebaf82009-06-16 05:40:30 -0700372static void __x25_destroy_socket(struct sock *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
374/*
375 * handler for deferred kills.
376 */
377static void x25_destroy_timer(unsigned long data)
378{
David S. Miller14ebaf82009-06-16 05:40:30 -0700379 x25_destroy_socket_from_timer((struct sock *)data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380}
381
382/*
383 * This is called from user mode and the timers. Thus it protects itself
384 * against interrupt users but doesn't worry about being called during
385 * work. Once it is removed from the queue no interrupt or bottom half
386 * will touch it and we are (fairly 8-) ) safe.
387 * Not static as it's used by the timer
388 */
David S. Miller14ebaf82009-06-16 05:40:30 -0700389static void __x25_destroy_socket(struct sock *sk)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390{
391 struct sk_buff *skb;
392
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 x25_stop_heartbeat(sk);
394 x25_stop_timer(sk);
395
396 x25_remove_socket(sk);
397 x25_clear_queues(sk); /* Flush the queues */
398
399 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
400 if (skb->sk != sk) { /* A pending connection */
401 /*
402 * Queue the unaccepted socket for death
403 */
andrew hendry2cec6b02010-04-17 14:17:32 +0000404 skb->sk->sk_state = TCP_LISTEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 sock_set_flag(skb->sk, SOCK_DEAD);
406 x25_start_heartbeat(skb->sk);
407 x25_sk(skb->sk)->state = X25_STATE_0;
408 }
409
410 kfree_skb(skb);
411 }
412
Eric Dumazetc5640392009-06-16 10:12:03 +0000413 if (sk_has_allocations(sk)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 /* Defer: outstanding buffers */
415 sk->sk_timer.expires = jiffies + 10 * HZ;
416 sk->sk_timer.function = x25_destroy_timer;
417 sk->sk_timer.data = (unsigned long)sk;
418 add_timer(&sk->sk_timer);
419 } else {
420 /* drop last reference so sock_put will free */
421 __sock_put(sk);
422 }
David S. Miller14ebaf82009-06-16 05:40:30 -0700423}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
David S. Miller14ebaf82009-06-16 05:40:30 -0700425void x25_destroy_socket_from_timer(struct sock *sk)
426{
427 sock_hold(sk);
428 bh_lock_sock(sk);
429 __x25_destroy_socket(sk);
430 bh_unlock_sock(sk);
431 sock_put(sk);
432}
433
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434/*
435 * Handling for system calls applied via the various interfaces to a
436 * X.25 socket object.
437 */
438
439static int x25_setsockopt(struct socket *sock, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700440 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441{
442 int opt;
443 struct sock *sk = sock->sk;
444 int rc = -ENOPROTOOPT;
445
446 if (level != SOL_X25 || optname != X25_QBITINCL)
447 goto out;
448
449 rc = -EINVAL;
450 if (optlen < sizeof(int))
451 goto out;
452
453 rc = -EFAULT;
454 if (get_user(opt, (int __user *)optval))
455 goto out;
456
andrew hendrycb863ff2010-05-16 22:59:41 +0000457 if (opt)
458 set_bit(X25_Q_BIT_FLAG, &x25_sk(sk)->flags);
459 else
460 clear_bit(X25_Q_BIT_FLAG, &x25_sk(sk)->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 rc = 0;
462out:
463 return rc;
464}
465
466static int x25_getsockopt(struct socket *sock, int level, int optname,
467 char __user *optval, int __user *optlen)
468{
469 struct sock *sk = sock->sk;
470 int val, len, rc = -ENOPROTOOPT;
YOSHIFUJI Hideakif8e1d2012007-02-09 23:25:27 +0900471
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 if (level != SOL_X25 || optname != X25_QBITINCL)
473 goto out;
474
475 rc = -EFAULT;
476 if (get_user(len, optlen))
477 goto out;
478
479 len = min_t(unsigned int, len, sizeof(int));
480
481 rc = -EINVAL;
482 if (len < 0)
483 goto out;
YOSHIFUJI Hideakif8e1d2012007-02-09 23:25:27 +0900484
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 rc = -EFAULT;
486 if (put_user(len, optlen))
487 goto out;
488
andrew hendrycb863ff2010-05-16 22:59:41 +0000489 val = test_bit(X25_Q_BIT_FLAG, &x25_sk(sk)->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 rc = copy_to_user(optval, &val, len) ? -EFAULT : 0;
491out:
492 return rc;
493}
494
495static int x25_listen(struct socket *sock, int backlog)
496{
497 struct sock *sk = sock->sk;
498 int rc = -EOPNOTSUPP;
499
andrew hendry25aa4ef2010-09-14 13:31:16 +0000500 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 if (sk->sk_state != TCP_LISTEN) {
502 memset(&x25_sk(sk)->dest_addr, 0, X25_ADDR_LEN);
503 sk->sk_max_ack_backlog = backlog;
504 sk->sk_state = TCP_LISTEN;
505 rc = 0;
506 }
andrew hendry25aa4ef2010-09-14 13:31:16 +0000507 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508
509 return rc;
510}
511
512static struct proto x25_proto = {
513 .name = "X25",
514 .owner = THIS_MODULE,
515 .obj_size = sizeof(struct x25_sock),
516};
517
Eric W. Biederman1b8d7ae2007-10-08 23:24:22 -0700518static struct sock *x25_alloc_socket(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519{
520 struct x25_sock *x25;
Pavel Emelyanov6257ff22007-11-01 00:39:31 -0700521 struct sock *sk = sk_alloc(net, AF_X25, GFP_ATOMIC, &x25_proto);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522
523 if (!sk)
524 goto out;
525
526 sock_init_data(NULL, sk);
527
528 x25 = x25_sk(sk);
529 skb_queue_head_init(&x25->ack_queue);
530 skb_queue_head_init(&x25->fragment_queue);
531 skb_queue_head_init(&x25->interrupt_in_queue);
532 skb_queue_head_init(&x25->interrupt_out_queue);
533out:
534 return sk;
535}
536
Eric Paris3f378b62009-11-05 22:18:14 -0800537static int x25_create(struct net *net, struct socket *sock, int protocol,
538 int kern)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539{
540 struct sock *sk;
541 struct x25_sock *x25;
andrew hendryb18e7a02010-02-14 02:00:11 +0000542 int rc = -EAFNOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543
Octavian Purdila09ad9bc2009-11-25 15:14:13 -0800544 if (!net_eq(net, &init_net))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 goto out;
546
andrew hendryb18e7a02010-02-14 02:00:11 +0000547 rc = -ESOCKTNOSUPPORT;
548 if (sock->type != SOCK_SEQPACKET)
549 goto out;
550
551 rc = -EINVAL;
552 if (protocol)
553 goto out;
554
555 rc = -ENOBUFS;
Eric W. Biederman1b8d7ae2007-10-08 23:24:22 -0700556 if ((sk = x25_alloc_socket(net)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 goto out;
558
559 x25 = x25_sk(sk);
560
561 sock_init_data(sock, sk);
562
563 x25_init_timers(sk);
564
565 sock->ops = &x25_proto_ops;
566 sk->sk_protocol = protocol;
567 sk->sk_backlog_rcv = x25_backlog_rcv;
568
569 x25->t21 = sysctl_x25_call_request_timeout;
570 x25->t22 = sysctl_x25_reset_request_timeout;
571 x25->t23 = sysctl_x25_clear_request_timeout;
572 x25->t2 = sysctl_x25_ack_holdback_timeout;
573 x25->state = X25_STATE_0;
Shaun Pereiracb65d502005-06-22 22:15:01 -0700574 x25->cudmatchlength = 0;
andrew hendry37cda782010-05-16 23:00:27 +0000575 set_bit(X25_ACCPT_APPRV_FLAG, &x25->flags); /* normally no cud */
Shaun Pereiraebc3f642005-06-22 22:16:17 -0700576 /* on call accept */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577
578 x25->facilities.winsize_in = X25_DEFAULT_WINDOW_SIZE;
579 x25->facilities.winsize_out = X25_DEFAULT_WINDOW_SIZE;
580 x25->facilities.pacsize_in = X25_DEFAULT_PACKET_SIZE;
581 x25->facilities.pacsize_out = X25_DEFAULT_PACKET_SIZE;
John Hughesddd04512010-04-04 06:48:10 +0000582 x25->facilities.throughput = 0; /* by default don't negotiate
583 throughput */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 x25->facilities.reverse = X25_DEFAULT_REVERSE;
YOSHIFUJI Hideakif8e1d2012007-02-09 23:25:27 +0900585 x25->dte_facilities.calling_len = 0;
586 x25->dte_facilities.called_len = 0;
587 memset(x25->dte_facilities.called_ae, '\0',
588 sizeof(x25->dte_facilities.called_ae));
589 memset(x25->dte_facilities.calling_ae, '\0',
590 sizeof(x25->dte_facilities.calling_ae));
Shaun Pereiraa64b7b92006-03-22 00:01:31 -0800591
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 rc = 0;
593out:
594 return rc;
595}
596
597static struct sock *x25_make_new(struct sock *osk)
598{
599 struct sock *sk = NULL;
600 struct x25_sock *x25, *ox25;
601
602 if (osk->sk_type != SOCK_SEQPACKET)
603 goto out;
604
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900605 if ((sk = x25_alloc_socket(sock_net(osk))) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 goto out;
607
608 x25 = x25_sk(sk);
609
610 sk->sk_type = osk->sk_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 sk->sk_priority = osk->sk_priority;
612 sk->sk_protocol = osk->sk_protocol;
613 sk->sk_rcvbuf = osk->sk_rcvbuf;
614 sk->sk_sndbuf = osk->sk_sndbuf;
615 sk->sk_state = TCP_ESTABLISHED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 sk->sk_backlog_rcv = osk->sk_backlog_rcv;
Shaun Pereiraa20a8552006-01-06 13:11:35 -0800617 sock_copy_flags(sk, osk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618
619 ox25 = x25_sk(osk);
620 x25->t21 = ox25->t21;
621 x25->t22 = ox25->t22;
622 x25->t23 = ox25->t23;
623 x25->t2 = ox25->t2;
andrew hendrycb863ff2010-05-16 22:59:41 +0000624 x25->flags = ox25->flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 x25->facilities = ox25->facilities;
Shaun Pereiraa64b7b92006-03-22 00:01:31 -0800626 x25->dte_facilities = ox25->dte_facilities;
Shaun Pereiracb65d502005-06-22 22:15:01 -0700627 x25->cudmatchlength = ox25->cudmatchlength;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628
andrew hendryb7792e32010-05-16 23:00:02 +0000629 clear_bit(X25_INTERRUPT_FLAG, &x25->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 x25_init_timers(sk);
631out:
632 return sk;
633}
634
635static int x25_release(struct socket *sock)
636{
637 struct sock *sk = sock->sk;
638 struct x25_sock *x25;
639
640 if (!sk)
Arnd Bergmann77b22832011-01-22 23:44:59 +0100641 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642
643 x25 = x25_sk(sk);
644
Arnd Bergmann77b22832011-01-22 23:44:59 +0100645 sock_hold(sk);
646 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 switch (x25->state) {
648
649 case X25_STATE_0:
650 case X25_STATE_2:
651 x25_disconnect(sk, 0, 0, 0);
Arnd Bergmann77b22832011-01-22 23:44:59 +0100652 __x25_destroy_socket(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 goto out;
654
655 case X25_STATE_1:
656 case X25_STATE_3:
657 case X25_STATE_4:
658 x25_clear_queues(sk);
659 x25_write_internal(sk, X25_CLEAR_REQUEST);
660 x25_start_t23timer(sk);
661 x25->state = X25_STATE_2;
662 sk->sk_state = TCP_CLOSE;
663 sk->sk_shutdown |= SEND_SHUTDOWN;
664 sk->sk_state_change(sk);
665 sock_set_flag(sk, SOCK_DEAD);
666 sock_set_flag(sk, SOCK_DESTROY);
667 break;
668 }
669
David S. Millerc751e4f2008-06-17 03:05:13 -0700670 sock_orphan(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671out:
Arnd Bergmann77b22832011-01-22 23:44:59 +0100672 release_sock(sk);
673 sock_put(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 return 0;
675}
676
677static int x25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
678{
679 struct sock *sk = sock->sk;
680 struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr;
andrew hendrya9288522010-02-14 02:00:45 +0000681 int len, i, rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682
683 if (!sock_flag(sk, SOCK_ZAPPED) ||
684 addr_len != sizeof(struct sockaddr_x25) ||
Arnd Bergmann91774902009-11-05 04:37:29 +0000685 addr->sx25_family != AF_X25) {
686 rc = -EINVAL;
687 goto out;
688 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689
andrew hendrya9288522010-02-14 02:00:45 +0000690 len = strlen(addr->sx25_addr.x25_addr);
691 for (i = 0; i < len; i++) {
692 if (!isdigit(addr->sx25_addr.x25_addr[i])) {
693 rc = -EINVAL;
694 goto out;
695 }
696 }
697
andrew hendry90c27292010-09-14 13:31:38 +0000698 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 x25_sk(sk)->source_addr = addr->sx25_addr;
700 x25_insert_socket(sk);
701 sock_reset_flag(sk, SOCK_ZAPPED);
andrew hendry90c27292010-09-14 13:31:38 +0000702 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 SOCK_DEBUG(sk, "x25_bind: socket is bound\n");
Arnd Bergmann91774902009-11-05 04:37:29 +0000704out:
Arnd Bergmann91774902009-11-05 04:37:29 +0000705 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706}
707
708static int x25_wait_for_connection_establishment(struct sock *sk)
709{
710 DECLARE_WAITQUEUE(wait, current);
YOSHIFUJI Hideakif8e1d2012007-02-09 23:25:27 +0900711 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
Eric Dumazetaa395142010-04-20 13:03:51 +0000713 add_wait_queue_exclusive(sk_sleep(sk), &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 for (;;) {
715 __set_current_state(TASK_INTERRUPTIBLE);
716 rc = -ERESTARTSYS;
717 if (signal_pending(current))
718 break;
719 rc = sock_error(sk);
720 if (rc) {
721 sk->sk_socket->state = SS_UNCONNECTED;
722 break;
723 }
724 rc = 0;
725 if (sk->sk_state != TCP_ESTABLISHED) {
726 release_sock(sk);
727 schedule();
728 lock_sock(sk);
729 } else
730 break;
731 }
732 __set_current_state(TASK_RUNNING);
Eric Dumazetaa395142010-04-20 13:03:51 +0000733 remove_wait_queue(sk_sleep(sk), &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 return rc;
735}
736
737static int x25_connect(struct socket *sock, struct sockaddr *uaddr,
738 int addr_len, int flags)
739{
740 struct sock *sk = sock->sk;
741 struct x25_sock *x25 = x25_sk(sk);
742 struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr;
743 struct x25_route *rt;
744 int rc = 0;
745
746 lock_sock(sk);
747 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
748 sock->state = SS_CONNECTED;
749 goto out; /* Connect completed during a ERESTARTSYS event */
750 }
751
752 rc = -ECONNREFUSED;
753 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
754 sock->state = SS_UNCONNECTED;
755 goto out;
756 }
757
758 rc = -EISCONN; /* No reconnect on a seqpacket socket */
759 if (sk->sk_state == TCP_ESTABLISHED)
760 goto out;
761
YOSHIFUJI Hideakif8e1d2012007-02-09 23:25:27 +0900762 sk->sk_state = TCP_CLOSE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 sock->state = SS_UNCONNECTED;
764
765 rc = -EINVAL;
766 if (addr_len != sizeof(struct sockaddr_x25) ||
767 addr->sx25_family != AF_X25)
768 goto out;
769
770 rc = -ENETUNREACH;
771 rt = x25_get_route(&addr->sx25_addr);
772 if (!rt)
773 goto out;
774
775 x25->neighbour = x25_get_neigh(rt->dev);
776 if (!x25->neighbour)
777 goto out_put_route;
778
779 x25_limit_facilities(&x25->facilities, x25->neighbour);
780
781 x25->lci = x25_new_lci(x25->neighbour);
782 if (!x25->lci)
783 goto out_put_neigh;
784
785 rc = -EINVAL;
786 if (sock_flag(sk, SOCK_ZAPPED)) /* Must bind first - autobinding does not work */
787 goto out_put_neigh;
788
789 if (!strcmp(x25->source_addr.x25_addr, null_x25_address.x25_addr))
790 memset(&x25->source_addr, '\0', X25_ADDR_LEN);
791
792 x25->dest_addr = addr->sx25_addr;
793
794 /* Move to connecting socket, start sending Connect Requests */
795 sock->state = SS_CONNECTING;
796 sk->sk_state = TCP_SYN_SENT;
797
798 x25->state = X25_STATE_1;
799
800 x25_write_internal(sk, X25_CALL_REQUEST);
801
802 x25_start_heartbeat(sk);
803 x25_start_t21timer(sk);
804
805 /* Now the loop */
806 rc = -EINPROGRESS;
807 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
808 goto out_put_neigh;
809
810 rc = x25_wait_for_connection_establishment(sk);
811 if (rc)
812 goto out_put_neigh;
813
814 sock->state = SS_CONNECTED;
815 rc = 0;
816out_put_neigh:
817 if (rc)
818 x25_neigh_put(x25->neighbour);
819out_put_route:
820 x25_route_put(rt);
821out:
822 release_sock(sk);
823 return rc;
824}
825
Shaun Pereirabac37ec2006-03-22 00:00:40 -0800826static int x25_wait_for_data(struct sock *sk, long timeout)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827{
828 DECLARE_WAITQUEUE(wait, current);
829 int rc = 0;
830
Eric Dumazetaa395142010-04-20 13:03:51 +0000831 add_wait_queue_exclusive(sk_sleep(sk), &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 for (;;) {
833 __set_current_state(TASK_INTERRUPTIBLE);
834 if (sk->sk_shutdown & RCV_SHUTDOWN)
835 break;
836 rc = -ERESTARTSYS;
837 if (signal_pending(current))
838 break;
839 rc = -EAGAIN;
840 if (!timeout)
841 break;
842 rc = 0;
843 if (skb_queue_empty(&sk->sk_receive_queue)) {
844 release_sock(sk);
845 timeout = schedule_timeout(timeout);
846 lock_sock(sk);
847 } else
848 break;
849 }
850 __set_current_state(TASK_RUNNING);
Eric Dumazetaa395142010-04-20 13:03:51 +0000851 remove_wait_queue(sk_sleep(sk), &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 return rc;
853}
YOSHIFUJI Hideakif8e1d2012007-02-09 23:25:27 +0900854
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855static int x25_accept(struct socket *sock, struct socket *newsock, int flags)
856{
857 struct sock *sk = sock->sk;
858 struct sock *newsk;
859 struct sk_buff *skb;
860 int rc = -EINVAL;
861
Andrew Hendry141646c2010-09-14 20:38:54 -0700862 if (!sk)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 goto out;
864
865 rc = -EOPNOTSUPP;
866 if (sk->sk_type != SOCK_SEQPACKET)
867 goto out;
868
869 lock_sock(sk);
Andrew Hendry141646c2010-09-14 20:38:54 -0700870 rc = -EINVAL;
871 if (sk->sk_state != TCP_LISTEN)
872 goto out2;
873
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 rc = x25_wait_for_data(sk, sk->sk_rcvtimeo);
875 if (rc)
876 goto out2;
877 skb = skb_dequeue(&sk->sk_receive_queue);
878 rc = -EINVAL;
879 if (!skb->sk)
880 goto out2;
881 newsk = skb->sk;
David S. Millerb61d38e2008-06-17 02:44:35 -0700882 sock_graft(newsk, newsock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883
884 /* Now attach up the new socket */
885 skb->sk = NULL;
886 kfree_skb(skb);
887 sk->sk_ack_backlog--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 newsock->state = SS_CONNECTED;
889 rc = 0;
890out2:
891 release_sock(sk);
892out:
893 return rc;
894}
895
896static int x25_getname(struct socket *sock, struct sockaddr *uaddr,
897 int *uaddr_len, int peer)
898{
899 struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)uaddr;
900 struct sock *sk = sock->sk;
901 struct x25_sock *x25 = x25_sk(sk);
Arnd Bergmann91774902009-11-05 04:37:29 +0000902 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903
904 if (peer) {
Arnd Bergmann91774902009-11-05 04:37:29 +0000905 if (sk->sk_state != TCP_ESTABLISHED) {
906 rc = -ENOTCONN;
907 goto out;
908 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909 sx25->sx25_addr = x25->dest_addr;
910 } else
911 sx25->sx25_addr = x25->source_addr;
912
913 sx25->sx25_family = AF_X25;
914 *uaddr_len = sizeof(*sx25);
915
Arnd Bergmann91774902009-11-05 04:37:29 +0000916out:
Arnd Bergmann91774902009-11-05 04:37:29 +0000917 return rc;
918}
919
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *nb,
921 unsigned int lci)
922{
923 struct sock *sk;
924 struct sock *make;
925 struct x25_sock *makex25;
926 struct x25_address source_addr, dest_addr;
927 struct x25_facilities facilities;
Shaun Pereiraa64b7b92006-03-22 00:01:31 -0800928 struct x25_dte_facilities dte_facilities;
Andrew Hendry95a9dc42007-02-08 13:34:02 -0800929 int len, addr_len, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930
931 /*
932 * Remove the LCI and frame type.
933 */
934 skb_pull(skb, X25_STD_MIN_LEN);
935
936 /*
937 * Extract the X.25 addresses and convert them to ASCII strings,
938 * and remove them.
John Hughesf5eb9172010-04-07 21:29:25 -0700939 *
940 * Address block is mandatory in call request packets
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 */
John Hughesf5eb9172010-04-07 21:29:25 -0700942 addr_len = x25_parse_address_block(skb, &source_addr, &dest_addr);
943 if (addr_len <= 0)
944 goto out_clear_request;
Andrew Hendry95a9dc42007-02-08 13:34:02 -0800945 skb_pull(skb, addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946
947 /*
948 * Get the length of the facilities, skip past them for the moment
949 * get the call user data because this is needed to determine
950 * the correct listener
John Hughesf5eb9172010-04-07 21:29:25 -0700951 *
952 * Facilities length is mandatory in call request packets
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953 */
John Hughesf5eb9172010-04-07 21:29:25 -0700954 if (skb->len < 1)
955 goto out_clear_request;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956 len = skb->data[0] + 1;
John Hughesf5eb9172010-04-07 21:29:25 -0700957 if (skb->len < len)
958 goto out_clear_request;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 skb_pull(skb,len);
960
961 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 * Find a listener for the particular address/cud pair.
963 */
Shaun Pereiracb65d502005-06-22 22:15:01 -0700964 sk = x25_find_listener(&source_addr,skb);
965 skb_push(skb,len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966
Andrew Hendry95a9dc42007-02-08 13:34:02 -0800967 if (sk != NULL && sk_acceptq_is_full(sk)) {
968 goto out_sock_put;
969 }
970
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 /*
Andrew Hendry95a9dc42007-02-08 13:34:02 -0800972 * We dont have any listeners for this incoming call.
973 * Try forwarding it.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 */
Andrew Hendry95a9dc42007-02-08 13:34:02 -0800975 if (sk == NULL) {
976 skb_push(skb, addr_len + X25_STD_MIN_LEN);
Andrew Hendry39e21c02007-02-08 13:34:36 -0800977 if (sysctl_x25_forward &&
978 x25_forward_call(&dest_addr, nb, skb, lci) > 0)
Andrew Hendry95a9dc42007-02-08 13:34:02 -0800979 {
980 /* Call was forwarded, dont process it any more */
981 kfree_skb(skb);
982 rc = 1;
983 goto out;
984 } else {
985 /* No listeners, can't forward, clear the call */
986 goto out_clear_request;
987 }
988 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989
990 /*
991 * Try to reach a compromise on the requested facilities.
992 */
Shaun Pereiraa64b7b92006-03-22 00:01:31 -0800993 len = x25_negotiate_facilities(skb, sk, &facilities, &dte_facilities);
994 if (len == -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 goto out_sock_put;
996
997 /*
998 * current neighbour/link might impose additional limits
999 * on certain facilties
1000 */
1001
1002 x25_limit_facilities(&facilities, nb);
1003
1004 /*
1005 * Try to create a new socket.
1006 */
1007 make = x25_make_new(sk);
1008 if (!make)
1009 goto out_sock_put;
1010
1011 /*
1012 * Remove the facilities
1013 */
1014 skb_pull(skb, len);
1015
1016 skb->sk = make;
1017 make->sk_state = TCP_ESTABLISHED;
1018
1019 makex25 = x25_sk(make);
1020 makex25->lci = lci;
1021 makex25->dest_addr = dest_addr;
1022 makex25->source_addr = source_addr;
1023 makex25->neighbour = nb;
1024 makex25->facilities = facilities;
Shaun Pereiraa64b7b92006-03-22 00:01:31 -08001025 makex25->dte_facilities= dte_facilities;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 makex25->vc_facil_mask = x25_sk(sk)->vc_facil_mask;
Shaun Pereiracb65d502005-06-22 22:15:01 -07001027 /* ensure no reverse facil on accept */
1028 makex25->vc_facil_mask &= ~X25_MASK_REVERSE;
Shaun Pereiraa64b7b92006-03-22 00:01:31 -08001029 /* ensure no calling address extension on accept */
1030 makex25->vc_facil_mask &= ~X25_MASK_CALLING_AE;
Shaun Pereiracb65d502005-06-22 22:15:01 -07001031 makex25->cudmatchlength = x25_sk(sk)->cudmatchlength;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032
andrew hendry37cda782010-05-16 23:00:27 +00001033 /* Normally all calls are accepted immediately */
1034 if (test_bit(X25_ACCPT_APPRV_FLAG, &makex25->flags)) {
Shaun Pereiraebc3f642005-06-22 22:16:17 -07001035 x25_write_internal(make, X25_CALL_ACCEPTED);
1036 makex25->state = X25_STATE_3;
1037 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038
Shaun Pereiracb65d502005-06-22 22:15:01 -07001039 /*
1040 * Incoming Call User Data.
1041 */
Roel Kluin8db09f22009-03-13 16:04:12 -07001042 skb_copy_from_linear_data(skb, makex25->calluserdata.cuddata, skb->len);
1043 makex25->calluserdata.cudlength = skb->len;
Shaun Pereiracb65d502005-06-22 22:15:01 -07001044
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 sk->sk_ack_backlog++;
1046
1047 x25_insert_socket(make);
1048
1049 skb_queue_head(&sk->sk_receive_queue, skb);
1050
1051 x25_start_heartbeat(make);
1052
1053 if (!sock_flag(sk, SOCK_DEAD))
1054 sk->sk_data_ready(sk, skb->len);
1055 rc = 1;
1056 sock_put(sk);
1057out:
1058 return rc;
1059out_sock_put:
1060 sock_put(sk);
1061out_clear_request:
1062 rc = 0;
1063 x25_transmit_clear_request(nb, lci, 0x01);
1064 goto out;
1065}
1066
1067static int x25_sendmsg(struct kiocb *iocb, struct socket *sock,
1068 struct msghdr *msg, size_t len)
1069{
1070 struct sock *sk = sock->sk;
1071 struct x25_sock *x25 = x25_sk(sk);
1072 struct sockaddr_x25 *usx25 = (struct sockaddr_x25 *)msg->msg_name;
1073 struct sockaddr_x25 sx25;
1074 struct sk_buff *skb;
1075 unsigned char *asmptr;
1076 int noblock = msg->msg_flags & MSG_DONTWAIT;
1077 size_t size;
1078 int qbit = 0, rc = -EINVAL;
1079
Arnd Bergmann77b22832011-01-22 23:44:59 +01001080 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_OOB|MSG_EOR|MSG_CMSG_COMPAT))
1082 goto out;
1083
1084 /* we currently don't support segmented records at the user interface */
1085 if (!(msg->msg_flags & (MSG_EOR|MSG_OOB)))
1086 goto out;
1087
1088 rc = -EADDRNOTAVAIL;
1089 if (sock_flag(sk, SOCK_ZAPPED))
1090 goto out;
1091
1092 rc = -EPIPE;
1093 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1094 send_sig(SIGPIPE, current, 0);
1095 goto out;
1096 }
1097
1098 rc = -ENETUNREACH;
1099 if (!x25->neighbour)
1100 goto out;
1101
1102 if (usx25) {
1103 rc = -EINVAL;
1104 if (msg->msg_namelen < sizeof(sx25))
1105 goto out;
1106 memcpy(&sx25, usx25, sizeof(sx25));
1107 rc = -EISCONN;
1108 if (strcmp(x25->dest_addr.x25_addr, sx25.sx25_addr.x25_addr))
1109 goto out;
1110 rc = -EINVAL;
1111 if (sx25.sx25_family != AF_X25)
1112 goto out;
1113 } else {
1114 /*
1115 * FIXME 1003.1g - if the socket is like this because
1116 * it has become closed (not started closed) we ought
1117 * to SIGPIPE, EPIPE;
1118 */
1119 rc = -ENOTCONN;
1120 if (sk->sk_state != TCP_ESTABLISHED)
1121 goto out;
1122
1123 sx25.sx25_family = AF_X25;
1124 sx25.sx25_addr = x25->dest_addr;
1125 }
1126
Alan Cox83e0bbc2009-03-27 00:28:21 -07001127 /* Sanity check the packet size */
1128 if (len > 65535) {
1129 rc = -EMSGSIZE;
1130 goto out;
1131 }
1132
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133 SOCK_DEBUG(sk, "x25_sendmsg: sendto: Addresses built.\n");
1134
1135 /* Build a packet */
1136 SOCK_DEBUG(sk, "x25_sendmsg: sendto: building packet.\n");
1137
1138 if ((msg->msg_flags & MSG_OOB) && len > 32)
1139 len = 32;
1140
1141 size = len + X25_MAX_L2_LEN + X25_EXT_MIN_LEN;
1142
Arnd Bergmann77b22832011-01-22 23:44:59 +01001143 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 skb = sock_alloc_send_skb(sk, size, noblock, &rc);
Arnd Bergmann77b22832011-01-22 23:44:59 +01001145 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 if (!skb)
1147 goto out;
1148 X25_SKB_CB(skb)->flags = msg->msg_flags;
1149
1150 skb_reserve(skb, X25_MAX_L2_LEN + X25_EXT_MIN_LEN);
1151
1152 /*
1153 * Put the data on the end
1154 */
1155 SOCK_DEBUG(sk, "x25_sendmsg: Copying user data\n");
1156
Arnaldo Carvalho de Meloeeeb0372007-03-14 21:04:34 -03001157 skb_reset_transport_header(skb);
1158 skb_put(skb, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159
Arnaldo Carvalho de Meloeeeb0372007-03-14 21:04:34 -03001160 rc = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161 if (rc)
1162 goto out_kfree_skb;
1163
1164 /*
1165 * If the Q BIT Include socket option is in force, the first
1166 * byte of the user data is the logical value of the Q Bit.
1167 */
andrew hendrycb863ff2010-05-16 22:59:41 +00001168 if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169 qbit = skb->data[0];
1170 skb_pull(skb, 1);
1171 }
1172
1173 /*
1174 * Push down the X.25 header
1175 */
1176 SOCK_DEBUG(sk, "x25_sendmsg: Building X.25 Header.\n");
1177
1178 if (msg->msg_flags & MSG_OOB) {
1179 if (x25->neighbour->extended) {
1180 asmptr = skb_push(skb, X25_STD_MIN_LEN);
1181 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ;
1182 *asmptr++ = (x25->lci >> 0) & 0xFF;
1183 *asmptr++ = X25_INTERRUPT;
1184 } else {
1185 asmptr = skb_push(skb, X25_STD_MIN_LEN);
1186 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ;
1187 *asmptr++ = (x25->lci >> 0) & 0xFF;
1188 *asmptr++ = X25_INTERRUPT;
1189 }
1190 } else {
1191 if (x25->neighbour->extended) {
1192 /* Build an Extended X.25 header */
1193 asmptr = skb_push(skb, X25_EXT_MIN_LEN);
1194 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ;
1195 *asmptr++ = (x25->lci >> 0) & 0xFF;
1196 *asmptr++ = X25_DATA;
1197 *asmptr++ = X25_DATA;
1198 } else {
1199 /* Build an Standard X.25 header */
1200 asmptr = skb_push(skb, X25_STD_MIN_LEN);
1201 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ;
1202 *asmptr++ = (x25->lci >> 0) & 0xFF;
1203 *asmptr++ = X25_DATA;
1204 }
1205
1206 if (qbit)
1207 skb->data[0] |= X25_Q_BIT;
1208 }
1209
1210 SOCK_DEBUG(sk, "x25_sendmsg: Built header.\n");
1211 SOCK_DEBUG(sk, "x25_sendmsg: Transmitting buffer\n");
1212
1213 rc = -ENOTCONN;
1214 if (sk->sk_state != TCP_ESTABLISHED)
1215 goto out_kfree_skb;
1216
1217 if (msg->msg_flags & MSG_OOB)
1218 skb_queue_tail(&x25->interrupt_out_queue, skb);
1219 else {
Roel Kluin8db09f22009-03-13 16:04:12 -07001220 rc = x25_output(sk, skb);
1221 len = rc;
1222 if (rc < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223 kfree_skb(skb);
andrew hendrycb863ff2010-05-16 22:59:41 +00001224 else if (test_bit(X25_Q_BIT_FLAG, &x25->flags))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225 len++;
1226 }
1227
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228 x25_kick(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229 rc = len;
1230out:
Arnd Bergmann77b22832011-01-22 23:44:59 +01001231 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 return rc;
1233out_kfree_skb:
1234 kfree_skb(skb);
1235 goto out;
1236}
1237
1238
1239static int x25_recvmsg(struct kiocb *iocb, struct socket *sock,
1240 struct msghdr *msg, size_t size,
1241 int flags)
1242{
1243 struct sock *sk = sock->sk;
1244 struct x25_sock *x25 = x25_sk(sk);
1245 struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name;
1246 size_t copied;
1247 int qbit;
1248 struct sk_buff *skb;
1249 unsigned char *asmptr;
1250 int rc = -ENOTCONN;
1251
Arnd Bergmann77b22832011-01-22 23:44:59 +01001252 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253 /*
1254 * This works for seqpacket too. The receiver has ordered the queue for
1255 * us! We do one quick check first though
1256 */
1257 if (sk->sk_state != TCP_ESTABLISHED)
1258 goto out;
1259
1260 if (flags & MSG_OOB) {
1261 rc = -EINVAL;
1262 if (sock_flag(sk, SOCK_URGINLINE) ||
1263 !skb_peek(&x25->interrupt_in_queue))
1264 goto out;
1265
1266 skb = skb_dequeue(&x25->interrupt_in_queue);
1267
1268 skb_pull(skb, X25_STD_MIN_LEN);
1269
1270 /*
1271 * No Q bit information on Interrupt data.
1272 */
andrew hendrycb863ff2010-05-16 22:59:41 +00001273 if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 asmptr = skb_push(skb, 1);
1275 *asmptr = 0x00;
1276 }
1277
1278 msg->msg_flags |= MSG_OOB;
1279 } else {
1280 /* Now we can treat all alike */
Arnd Bergmann77b22832011-01-22 23:44:59 +01001281 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1283 flags & MSG_DONTWAIT, &rc);
Arnd Bergmann77b22832011-01-22 23:44:59 +01001284 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285 if (!skb)
1286 goto out;
1287
1288 qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT;
1289
1290 skb_pull(skb, x25->neighbour->extended ?
1291 X25_EXT_MIN_LEN : X25_STD_MIN_LEN);
1292
andrew hendrycb863ff2010-05-16 22:59:41 +00001293 if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294 asmptr = skb_push(skb, 1);
1295 *asmptr = qbit;
1296 }
1297 }
1298
Arnaldo Carvalho de Melobadff6d2007-03-13 13:06:52 -03001299 skb_reset_transport_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300 copied = skb->len;
1301
1302 if (copied > size) {
1303 copied = size;
1304 msg->msg_flags |= MSG_TRUNC;
1305 }
1306
YOSHIFUJI Hideakif8e1d2012007-02-09 23:25:27 +09001307 /* Currently, each datagram always contains a complete record */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 msg->msg_flags |= MSG_EOR;
1309
1310 rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1311 if (rc)
1312 goto out_free_dgram;
1313
1314 if (sx25) {
1315 sx25->sx25_family = AF_X25;
1316 sx25->sx25_addr = x25->dest_addr;
1317 }
1318
1319 msg->msg_namelen = sizeof(struct sockaddr_x25);
1320
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321 x25_check_rbuf(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322 rc = copied;
1323out_free_dgram:
1324 skb_free_datagram(sk, skb);
1325out:
Arnd Bergmann77b22832011-01-22 23:44:59 +01001326 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 return rc;
1328}
1329
1330
1331static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1332{
1333 struct sock *sk = sock->sk;
1334 struct x25_sock *x25 = x25_sk(sk);
1335 void __user *argp = (void __user *)arg;
1336 int rc;
1337
1338 switch (cmd) {
Joe Perchesfddc5f32011-07-01 09:43:13 +00001339 case TIOCOUTQ: {
1340 int amount;
Eric Dumazet31e6d362009-06-17 19:05:41 -07001341
Joe Perchesfddc5f32011-07-01 09:43:13 +00001342 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1343 if (amount < 0)
1344 amount = 0;
1345 rc = put_user(amount, (unsigned int __user *)argp);
1346 break;
1347 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348
Joe Perchesfddc5f32011-07-01 09:43:13 +00001349 case TIOCINQ: {
1350 struct sk_buff *skb;
1351 int amount = 0;
1352 /*
1353 * These two are safe on a single CPU system as
1354 * only user tasks fiddle here
1355 */
1356 lock_sock(sk);
1357 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1358 amount = skb->len;
1359 release_sock(sk);
1360 rc = put_user(amount, (unsigned int __user *)argp);
1361 break;
1362 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363
Joe Perchesfddc5f32011-07-01 09:43:13 +00001364 case SIOCGSTAMP:
1365 rc = -EINVAL;
1366 if (sk)
1367 rc = sock_get_timestamp(sk,
YOSHIFUJI Hideakif8e1d2012007-02-09 23:25:27 +09001368 (struct timeval __user *)argp);
Joe Perchesfddc5f32011-07-01 09:43:13 +00001369 break;
1370 case SIOCGSTAMPNS:
1371 rc = -EINVAL;
1372 if (sk)
1373 rc = sock_get_timestampns(sk,
1374 (struct timespec __user *)argp);
1375 break;
1376 case SIOCGIFADDR:
1377 case SIOCSIFADDR:
1378 case SIOCGIFDSTADDR:
1379 case SIOCSIFDSTADDR:
1380 case SIOCGIFBRDADDR:
1381 case SIOCSIFBRDADDR:
1382 case SIOCGIFNETMASK:
1383 case SIOCSIFNETMASK:
1384 case SIOCGIFMETRIC:
1385 case SIOCSIFMETRIC:
1386 rc = -EINVAL;
1387 break;
1388 case SIOCADDRT:
1389 case SIOCDELRT:
1390 rc = -EPERM;
1391 if (!capable(CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392 break;
Joe Perchesfddc5f32011-07-01 09:43:13 +00001393 rc = x25_route_ioctl(cmd, argp);
1394 break;
1395 case SIOCX25GSUBSCRIP:
1396 rc = x25_subscr_ioctl(cmd, argp);
1397 break;
1398 case SIOCX25SSUBSCRIP:
1399 rc = -EPERM;
1400 if (!capable(CAP_NET_ADMIN))
Eric Dumazetae40eb12007-03-18 17:33:16 -07001401 break;
Joe Perchesfddc5f32011-07-01 09:43:13 +00001402 rc = x25_subscr_ioctl(cmd, argp);
1403 break;
1404 case SIOCX25GFACILITIES: {
1405 lock_sock(sk);
1406 rc = copy_to_user(argp, &x25->facilities,
1407 sizeof(x25->facilities))
1408 ? -EFAULT : 0;
1409 release_sock(sk);
1410 break;
1411 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412
Joe Perchesfddc5f32011-07-01 09:43:13 +00001413 case SIOCX25SFACILITIES: {
1414 struct x25_facilities facilities;
1415 rc = -EFAULT;
1416 if (copy_from_user(&facilities, argp, sizeof(facilities)))
1417 break;
1418 rc = -EINVAL;
1419 lock_sock(sk);
1420 if (sk->sk_state != TCP_LISTEN &&
1421 sk->sk_state != TCP_CLOSE)
1422 goto out_fac_release;
1423 if (facilities.pacsize_in < X25_PS16 ||
1424 facilities.pacsize_in > X25_PS4096)
1425 goto out_fac_release;
1426 if (facilities.pacsize_out < X25_PS16 ||
1427 facilities.pacsize_out > X25_PS4096)
1428 goto out_fac_release;
1429 if (facilities.winsize_in < 1 ||
1430 facilities.winsize_in > 127)
1431 goto out_fac_release;
1432 if (facilities.throughput) {
1433 int out = facilities.throughput & 0xf0;
1434 int in = facilities.throughput & 0x0f;
1435 if (!out)
1436 facilities.throughput |=
1437 X25_DEFAULT_THROUGHPUT << 4;
1438 else if (out < 0x30 || out > 0xD0)
andrew hendryf90de662010-11-25 02:18:35 +00001439 goto out_fac_release;
Joe Perchesfddc5f32011-07-01 09:43:13 +00001440 if (!in)
1441 facilities.throughput |=
1442 X25_DEFAULT_THROUGHPUT;
1443 else if (in < 0x03 || in > 0x0D)
andrew hendryf90de662010-11-25 02:18:35 +00001444 goto out_fac_release;
Joe Perchesfddc5f32011-07-01 09:43:13 +00001445 }
1446 if (facilities.reverse &&
1447 (facilities.reverse & 0x81) != 0x81)
1448 goto out_fac_release;
1449 x25->facilities = facilities;
1450 rc = 0;
andrew hendryf90de662010-11-25 02:18:35 +00001451out_fac_release:
Joe Perchesfddc5f32011-07-01 09:43:13 +00001452 release_sock(sk);
1453 break;
1454 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455
Joe Perchesfddc5f32011-07-01 09:43:13 +00001456 case SIOCX25GDTEFACILITIES: {
1457 lock_sock(sk);
1458 rc = copy_to_user(argp, &x25->dte_facilities,
1459 sizeof(x25->dte_facilities));
1460 release_sock(sk);
1461 if (rc)
YOSHIFUJI Hideakif8e1d2012007-02-09 23:25:27 +09001462 rc = -EFAULT;
Joe Perchesfddc5f32011-07-01 09:43:13 +00001463 break;
1464 }
1465
1466 case SIOCX25SDTEFACILITIES: {
1467 struct x25_dte_facilities dtefacs;
1468 rc = -EFAULT;
1469 if (copy_from_user(&dtefacs, argp, sizeof(dtefacs)))
1470 break;
1471 rc = -EINVAL;
1472 lock_sock(sk);
1473 if (sk->sk_state != TCP_LISTEN &&
1474 sk->sk_state != TCP_CLOSE)
1475 goto out_dtefac_release;
1476 if (dtefacs.calling_len > X25_MAX_AE_LEN)
1477 goto out_dtefac_release;
1478 if (dtefacs.calling_ae == NULL)
1479 goto out_dtefac_release;
1480 if (dtefacs.called_len > X25_MAX_AE_LEN)
1481 goto out_dtefac_release;
1482 if (dtefacs.called_ae == NULL)
1483 goto out_dtefac_release;
1484 x25->dte_facilities = dtefacs;
1485 rc = 0;
andrew hendryf90de662010-11-25 02:18:35 +00001486out_dtefac_release:
Joe Perchesfddc5f32011-07-01 09:43:13 +00001487 release_sock(sk);
1488 break;
1489 }
1490
1491 case SIOCX25GCALLUSERDATA: {
1492 lock_sock(sk);
1493 rc = copy_to_user(argp, &x25->calluserdata,
1494 sizeof(x25->calluserdata))
1495 ? -EFAULT : 0;
1496 release_sock(sk);
1497 break;
1498 }
1499
1500 case SIOCX25SCALLUSERDATA: {
1501 struct x25_calluserdata calluserdata;
1502
1503 rc = -EFAULT;
1504 if (copy_from_user(&calluserdata, argp, sizeof(calluserdata)))
Shaun Pereiraa64b7b92006-03-22 00:01:31 -08001505 break;
Joe Perchesfddc5f32011-07-01 09:43:13 +00001506 rc = -EINVAL;
1507 if (calluserdata.cudlength > X25_MAX_CUD_LEN)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001508 break;
Joe Perchesfddc5f32011-07-01 09:43:13 +00001509 lock_sock(sk);
1510 x25->calluserdata = calluserdata;
1511 release_sock(sk);
1512 rc = 0;
1513 break;
1514 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515
Joe Perchesfddc5f32011-07-01 09:43:13 +00001516 case SIOCX25GCAUSEDIAG: {
1517 lock_sock(sk);
1518 rc = copy_to_user(argp, &x25->causediag, sizeof(x25->causediag))
1519 ? -EFAULT : 0;
1520 release_sock(sk);
1521 break;
1522 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523
Joe Perchesfddc5f32011-07-01 09:43:13 +00001524 case SIOCX25SCAUSEDIAG: {
1525 struct x25_causediag causediag;
1526 rc = -EFAULT;
1527 if (copy_from_user(&causediag, argp, sizeof(causediag)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528 break;
Joe Perchesfddc5f32011-07-01 09:43:13 +00001529 lock_sock(sk);
1530 x25->causediag = causediag;
1531 release_sock(sk);
1532 rc = 0;
1533 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534
Joe Perchesfddc5f32011-07-01 09:43:13 +00001535 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536
Joe Perchesfddc5f32011-07-01 09:43:13 +00001537 case SIOCX25SCUDMATCHLEN: {
1538 struct x25_subaddr sub_addr;
1539 rc = -EINVAL;
1540 lock_sock(sk);
1541 if(sk->sk_state != TCP_CLOSE)
1542 goto out_cud_release;
1543 rc = -EFAULT;
1544 if (copy_from_user(&sub_addr, argp,
1545 sizeof(sub_addr)))
1546 goto out_cud_release;
1547 rc = -EINVAL;
1548 if (sub_addr.cudmatchlength > X25_MAX_CUD_LEN)
1549 goto out_cud_release;
1550 x25->cudmatchlength = sub_addr.cudmatchlength;
1551 rc = 0;
andrew hendry3f0a0692010-11-25 02:18:45 +00001552out_cud_release:
Joe Perchesfddc5f32011-07-01 09:43:13 +00001553 release_sock(sk);
1554 break;
1555 }
Shaun Pereiracb65d502005-06-22 22:15:01 -07001556
Joe Perchesfddc5f32011-07-01 09:43:13 +00001557 case SIOCX25CALLACCPTAPPRV: {
1558 rc = -EINVAL;
1559 lock_sock(sk);
1560 if (sk->sk_state != TCP_CLOSE)
Shaun Pereiraebc3f642005-06-22 22:16:17 -07001561 break;
Joe Perchesfddc5f32011-07-01 09:43:13 +00001562 clear_bit(X25_ACCPT_APPRV_FLAG, &x25->flags);
1563 release_sock(sk);
1564 rc = 0;
1565 break;
1566 }
Shaun Pereiraebc3f642005-06-22 22:16:17 -07001567
Joe Perchesfddc5f32011-07-01 09:43:13 +00001568 case SIOCX25SENDCALLACCPT: {
1569 rc = -EINVAL;
1570 lock_sock(sk);
1571 if (sk->sk_state != TCP_ESTABLISHED)
Shaun Pereiraebc3f642005-06-22 22:16:17 -07001572 break;
Joe Perchesfddc5f32011-07-01 09:43:13 +00001573 /* must call accptapprv above */
1574 if (test_bit(X25_ACCPT_APPRV_FLAG, &x25->flags))
1575 break;
1576 x25_write_internal(sk, X25_CALL_ACCEPTED);
1577 x25->state = X25_STATE_3;
1578 release_sock(sk);
1579 rc = 0;
1580 break;
1581 }
Shaun Pereiraebc3f642005-06-22 22:16:17 -07001582
Joe Perchesfddc5f32011-07-01 09:43:13 +00001583 default:
1584 rc = -ENOIOCTLCMD;
1585 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586 }
1587
1588 return rc;
1589}
1590
Stephen Hemmingerec1b4cf2009-10-05 05:58:39 +00001591static const struct net_proto_family x25_family_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592 .family = AF_X25,
1593 .create = x25_create,
1594 .owner = THIS_MODULE,
1595};
1596
Shaun Pereira1b06e6b2006-03-22 00:00:12 -08001597#ifdef CONFIG_COMPAT
1598static int compat_x25_subscr_ioctl(unsigned int cmd,
1599 struct compat_x25_subscrip_struct __user *x25_subscr32)
1600{
1601 struct compat_x25_subscrip_struct x25_subscr;
1602 struct x25_neigh *nb;
1603 struct net_device *dev;
1604 int rc = -EINVAL;
1605
1606 rc = -EFAULT;
1607 if (copy_from_user(&x25_subscr, x25_subscr32, sizeof(*x25_subscr32)))
1608 goto out;
1609
1610 rc = -EINVAL;
1611 dev = x25_dev_get(x25_subscr.device);
1612 if (dev == NULL)
1613 goto out;
1614
1615 nb = x25_get_neigh(dev);
1616 if (nb == NULL)
1617 goto out_dev_put;
1618
1619 dev_put(dev);
1620
1621 if (cmd == SIOCX25GSUBSCRIP) {
andrew hendry5595a1a2010-11-25 02:18:15 +00001622 read_lock_bh(&x25_neigh_list_lock);
Shaun Pereira1b06e6b2006-03-22 00:00:12 -08001623 x25_subscr.extended = nb->extended;
1624 x25_subscr.global_facil_mask = nb->global_facil_mask;
andrew hendry5595a1a2010-11-25 02:18:15 +00001625 read_unlock_bh(&x25_neigh_list_lock);
Shaun Pereira1b06e6b2006-03-22 00:00:12 -08001626 rc = copy_to_user(x25_subscr32, &x25_subscr,
1627 sizeof(*x25_subscr32)) ? -EFAULT : 0;
1628 } else {
1629 rc = -EINVAL;
1630 if (x25_subscr.extended == 0 || x25_subscr.extended == 1) {
1631 rc = 0;
andrew hendry5595a1a2010-11-25 02:18:15 +00001632 write_lock_bh(&x25_neigh_list_lock);
Shaun Pereira1b06e6b2006-03-22 00:00:12 -08001633 nb->extended = x25_subscr.extended;
1634 nb->global_facil_mask = x25_subscr.global_facil_mask;
andrew hendry5595a1a2010-11-25 02:18:15 +00001635 write_unlock_bh(&x25_neigh_list_lock);
Shaun Pereira1b06e6b2006-03-22 00:00:12 -08001636 }
1637 }
1638 x25_neigh_put(nb);
1639out:
1640 return rc;
1641out_dev_put:
1642 dev_put(dev);
1643 goto out;
1644}
1645
1646static int compat_x25_ioctl(struct socket *sock, unsigned int cmd,
1647 unsigned long arg)
1648{
1649 void __user *argp = compat_ptr(arg);
1650 struct sock *sk = sock->sk;
1651
1652 int rc = -ENOIOCTLCMD;
1653
1654 switch(cmd) {
1655 case TIOCOUTQ:
1656 case TIOCINQ:
1657 rc = x25_ioctl(sock, cmd, (unsigned long)argp);
1658 break;
1659 case SIOCGSTAMP:
1660 rc = -EINVAL;
1661 if (sk)
1662 rc = compat_sock_get_timestamp(sk,
1663 (struct timeval __user*)argp);
1664 break;
Eric Dumazetae40eb12007-03-18 17:33:16 -07001665 case SIOCGSTAMPNS:
1666 rc = -EINVAL;
1667 if (sk)
1668 rc = compat_sock_get_timestampns(sk,
1669 (struct timespec __user*)argp);
1670 break;
Shaun Pereira1b06e6b2006-03-22 00:00:12 -08001671 case SIOCGIFADDR:
1672 case SIOCSIFADDR:
1673 case SIOCGIFDSTADDR:
1674 case SIOCSIFDSTADDR:
1675 case SIOCGIFBRDADDR:
1676 case SIOCSIFBRDADDR:
1677 case SIOCGIFNETMASK:
1678 case SIOCSIFNETMASK:
1679 case SIOCGIFMETRIC:
1680 case SIOCSIFMETRIC:
1681 rc = -EINVAL;
1682 break;
1683 case SIOCADDRT:
1684 case SIOCDELRT:
1685 rc = -EPERM;
1686 if (!capable(CAP_NET_ADMIN))
1687 break;
1688 rc = x25_route_ioctl(cmd, argp);
1689 break;
1690 case SIOCX25GSUBSCRIP:
1691 rc = compat_x25_subscr_ioctl(cmd, argp);
1692 break;
1693 case SIOCX25SSUBSCRIP:
1694 rc = -EPERM;
1695 if (!capable(CAP_NET_ADMIN))
1696 break;
1697 rc = compat_x25_subscr_ioctl(cmd, argp);
1698 break;
1699 case SIOCX25GFACILITIES:
1700 case SIOCX25SFACILITIES:
Shaun Pereira9a6b9f22006-03-22 00:02:00 -08001701 case SIOCX25GDTEFACILITIES:
1702 case SIOCX25SDTEFACILITIES:
Shaun Pereira1b06e6b2006-03-22 00:00:12 -08001703 case SIOCX25GCALLUSERDATA:
1704 case SIOCX25SCALLUSERDATA:
1705 case SIOCX25GCAUSEDIAG:
Andrew Hendry386e50c2009-11-18 23:30:41 -08001706 case SIOCX25SCAUSEDIAG:
Shaun Pereira1b06e6b2006-03-22 00:00:12 -08001707 case SIOCX25SCUDMATCHLEN:
1708 case SIOCX25CALLACCPTAPPRV:
1709 case SIOCX25SENDCALLACCPT:
1710 rc = x25_ioctl(sock, cmd, (unsigned long)argp);
1711 break;
1712 default:
1713 rc = -ENOIOCTLCMD;
1714 break;
1715 }
1716 return rc;
1717}
1718#endif
1719
Arnd Bergmann91774902009-11-05 04:37:29 +00001720static const struct proto_ops x25_proto_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721 .family = AF_X25,
1722 .owner = THIS_MODULE,
1723 .release = x25_release,
1724 .bind = x25_bind,
1725 .connect = x25_connect,
1726 .socketpair = sock_no_socketpair,
1727 .accept = x25_accept,
1728 .getname = x25_getname,
andrew hendry768190f2010-09-21 15:24:45 +00001729 .poll = datagram_poll,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001730 .ioctl = x25_ioctl,
Shaun Pereira1b06e6b2006-03-22 00:00:12 -08001731#ifdef CONFIG_COMPAT
1732 .compat_ioctl = compat_x25_ioctl,
1733#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734 .listen = x25_listen,
1735 .shutdown = sock_no_shutdown,
1736 .setsockopt = x25_setsockopt,
1737 .getsockopt = x25_getsockopt,
1738 .sendmsg = x25_sendmsg,
1739 .recvmsg = x25_recvmsg,
1740 .mmap = sock_no_mmap,
1741 .sendpage = sock_no_sendpage,
1742};
1743
Stephen Hemminger7546dd92009-03-09 08:18:29 +00001744static struct packet_type x25_packet_type __read_mostly = {
Harvey Harrison09640e62009-02-01 00:45:17 -08001745 .type = cpu_to_be16(ETH_P_X25),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746 .func = x25_lapb_receive_frame,
1747};
1748
1749static struct notifier_block x25_dev_notifier = {
1750 .notifier_call = x25_device_event,
1751};
1752
1753void x25_kill_by_neigh(struct x25_neigh *nb)
1754{
1755 struct sock *s;
1756 struct hlist_node *node;
1757
1758 write_lock_bh(&x25_list_lock);
1759
1760 sk_for_each(s, node, &x25_list)
1761 if (x25_sk(s)->neighbour == nb)
1762 x25_disconnect(s, ENETUNREACH, 0, 0);
1763
1764 write_unlock_bh(&x25_list_lock);
Andrew Hendry95a9dc42007-02-08 13:34:02 -08001765
1766 /* Remove any related forwards */
1767 x25_clear_forward_by_dev(nb->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768}
1769
1770static int __init x25_init(void)
1771{
1772 int rc = proto_register(&x25_proto, 0);
1773
1774 if (rc != 0)
1775 goto out;
1776
andrew hendry1fd975a2009-11-24 15:15:42 +00001777 rc = sock_register(&x25_family_ops);
1778 if (rc != 0)
1779 goto out_proto;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780
1781 dev_add_pack(&x25_packet_type);
1782
andrew hendry1fd975a2009-11-24 15:15:42 +00001783 rc = register_netdevice_notifier(&x25_dev_notifier);
1784 if (rc != 0)
1785 goto out_sock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001786
maximilian attemsa44562e2008-01-28 20:43:16 -08001787 printk(KERN_INFO "X.25 for Linux Version 0.2\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001788
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789 x25_register_sysctl();
andrew hendry1fd975a2009-11-24 15:15:42 +00001790 rc = x25_proc_init();
1791 if (rc != 0)
1792 goto out_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793out:
1794 return rc;
andrew hendry1fd975a2009-11-24 15:15:42 +00001795out_dev:
1796 unregister_netdevice_notifier(&x25_dev_notifier);
1797out_sock:
1798 sock_unregister(AF_X25);
1799out_proto:
1800 proto_unregister(&x25_proto);
1801 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001802}
1803module_init(x25_init);
1804
1805static void __exit x25_exit(void)
1806{
1807 x25_proc_exit();
1808 x25_link_free();
1809 x25_route_free();
1810
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811 x25_unregister_sysctl();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812
1813 unregister_netdevice_notifier(&x25_dev_notifier);
1814
1815 dev_remove_pack(&x25_packet_type);
1816
1817 sock_unregister(AF_X25);
1818 proto_unregister(&x25_proto);
1819}
1820module_exit(x25_exit);
1821
1822MODULE_AUTHOR("Jonathan Naylor <g4klx@g4klx.demon.co.uk>");
1823MODULE_DESCRIPTION("The X.25 Packet Layer network layer protocol");
1824MODULE_LICENSE("GPL");
1825MODULE_ALIAS_NETPROTO(PF_X25);