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[net-next-2.6.git] / net / x25 / af_x25.c
CommitLineData
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>
49#include <net/sock.h>
c752f073 50#include <net/tcp_states.h>
1da177e4
LT		 51#include <asm/uaccess.h>
52#include <linux/fcntl.h>
53#include <linux/termios.h> /* For TIOCINQ/OUTQ */
54#include <linux/notifier.h>
55#include <linux/init.h>
1b06e6ba
SP		 56#include <linux/compat.h>
57
1da177e4 58#include <net/x25.h>
1b06e6ba 59#include <net/compat.h>
1da177e4
LT		 60
61int sysctl_x25_restart_request_timeout = X25_DEFAULT_T20;
62int sysctl_x25_call_request_timeout = X25_DEFAULT_T21;
63int sysctl_x25_reset_request_timeout = X25_DEFAULT_T22;
64int sysctl_x25_clear_request_timeout = X25_DEFAULT_T23;
65int sysctl_x25_ack_holdback_timeout = X25_DEFAULT_T2;
39e21c0d 66int sysctl_x25_forward = 0;
1da177e4
LT		 67
68HLIST_HEAD(x25_list);
69DEFINE_RWLOCK(x25_list_lock);
70
90ddc4f0 71static const struct proto_ops x25_proto_ops;
1da177e4
LT		 72
73static struct x25_address null_x25_address = {" "};
74
1b06e6ba
SP		 75#ifdef CONFIG_COMPAT
76struct compat_x25_subscrip_struct {
77 char device[200-sizeof(compat_ulong_t)];
78 compat_ulong_t global_facil_mask;
79 compat_uint_t extended;
80};
81#endif
82
1da177e4
LT		 83int x25_addr_ntoa(unsigned char *p, struct x25_address *called_addr,
84 struct x25_address *calling_addr)
85{
6bf1574e 86 unsigned int called_len, calling_len;
1da177e4 87 char *called, *calling;
6bf1574e 88 unsigned int i;
1da177e4
LT		 89
90 called_len = (*p >> 0) & 0x0F;
91 calling_len = (*p >> 4) & 0x0F;
92
93 called = called_addr->x25_addr;
94 calling = calling_addr->x25_addr;
95 p++;
96
97 for (i = 0; i < (called_len + calling_len); i++) {
98 if (i < called_len) {
99 if (i % 2 != 0) {
100 *called++ = ((*p >> 0) & 0x0F) + '0';
101 p++;
102 } else {
103 *called++ = ((*p >> 4) & 0x0F) + '0';
104 }
105 } else {
106 if (i % 2 != 0) {
107 *calling++ = ((*p >> 0) & 0x0F) + '0';
108 p++;
109 } else {
110 *calling++ = ((*p >> 4) & 0x0F) + '0';
111 }
112 }
113 }
114
115 *called = *calling = '\0';
116
117 return 1 + (called_len + calling_len + 1) / 2;
118}
119
120int x25_addr_aton(unsigned char *p, struct x25_address *called_addr,
121 struct x25_address *calling_addr)
122{
123 unsigned int called_len, calling_len;
124 char *called, *calling;
125 int i;
126
127 called = called_addr->x25_addr;
128 calling = calling_addr->x25_addr;
129
130 called_len = strlen(called);
131 calling_len = strlen(calling);
132
133 *p++ = (calling_len << 4) | (called_len << 0);
134
135 for (i = 0; i < (called_len + calling_len); i++) {
136 if (i < called_len) {
137 if (i % 2 != 0) {
138 *p |= (*called++ - '0') << 0;
139 p++;
140 } else {
141 *p = 0x00;
142 *p |= (*called++ - '0') << 4;
143 }
144 } else {
145 if (i % 2 != 0) {
146 *p |= (*calling++ - '0') << 0;
147 p++;
148 } else {
149 *p = 0x00;
150 *p |= (*calling++ - '0') << 4;
151 }
152 }
153 }
154
155 return 1 + (called_len + calling_len + 1) / 2;
156}
157
158/*
159 * Socket removal during an interrupt is now safe.
160 */
161static void x25_remove_socket(struct sock *sk)
162{
163 write_lock_bh(&x25_list_lock);
164 sk_del_node_init(sk);
165 write_unlock_bh(&x25_list_lock);
166}
167
168/*
169 * Kill all bound sockets on a dropped device.
170 */
171static void x25_kill_by_device(struct net_device *dev)
172{
173 struct sock *s;
174 struct hlist_node *node;
175
176 write_lock_bh(&x25_list_lock);
177
178 sk_for_each(s, node, &x25_list)
179 if (x25_sk(s)->neighbour && x25_sk(s)->neighbour->dev == dev)
180 x25_disconnect(s, ENETUNREACH, 0, 0);
181
182 write_unlock_bh(&x25_list_lock);
183}
184
185/*
186 * Handle device status changes.
187 */
188static int x25_device_event(struct notifier_block *this, unsigned long event,
189 void *ptr)
190{
191 struct net_device *dev = ptr;
192 struct x25_neigh *nb;
193
721499e8 194 if (!net_eq(dev_net(dev), &init_net))
e9dc8653
EB		 195 return NOTIFY_DONE;
196
1da177e4
LT		 197 if (dev->type == ARPHRD_X25
198#if defined(CONFIG_LLC) || defined(CONFIG_LLC_MODULE)
199 || dev->type == ARPHRD_ETHER
200#endif
201 ) {
202 switch (event) {
203 case NETDEV_UP:
204 x25_link_device_up(dev);
205 break;
206 case NETDEV_GOING_DOWN:
207 nb = x25_get_neigh(dev);
208 if (nb) {
209 x25_terminate_link(nb);
210 x25_neigh_put(nb);
211 }
212 break;
213 case NETDEV_DOWN:
214 x25_kill_by_device(dev);
215 x25_route_device_down(dev);
216 x25_link_device_down(dev);
217 break;
218 }
219 }
220
221 return NOTIFY_DONE;
222}
223
224/*
225 * Add a socket to the bound sockets list.
226 */
227static void x25_insert_socket(struct sock *sk)
228{
229 write_lock_bh(&x25_list_lock);
230 sk_add_node(sk, &x25_list);
231 write_unlock_bh(&x25_list_lock);
232}
233
234/*
235 * Find a socket that wants to accept the Call Request we just
236 * received. Check the full list for an address/cud match.
237 * If no cuds match return the next_best thing, an address match.
238 * Note: if a listening socket has cud set it must only get calls
239 * with matching cud.
240 */
cb65d506
SP		 241static struct sock *x25_find_listener(struct x25_address *addr,
242 struct sk_buff *skb)
1da177e4
LT		 243{
244 struct sock *s;
245 struct sock *next_best;
246 struct hlist_node *node;
247
248 read_lock_bh(&x25_list_lock);
249 next_best = NULL;
250
251 sk_for_each(s, node, &x25_list)
252 if ((!strcmp(addr->x25_addr,
cb65d506
SP		 253 x25_sk(s)->source_addr.x25_addr) ||
254 !strcmp(addr->x25_addr,
255 null_x25_address.x25_addr)) &&
256 s->sk_state == TCP_LISTEN) {
1da177e4
LT		 257 /*
258 * Found a listening socket, now check the incoming
259 * call user data vs this sockets call user data
260 */
cb65d506 261 if(skb->len > 0 && x25_sk(s)->cudmatchlength > 0) {
f8e1d201
YH		 262 if((memcmp(x25_sk(s)->calluserdata.cuddata,
263 skb->data,
cb65d506
SP		 264 x25_sk(s)->cudmatchlength)) == 0) {
265 sock_hold(s);
266 goto found;
267 }
268 } else
1da177e4 269 next_best = s;
1da177e4
LT		 270 }
271 if (next_best) {
272 s = next_best;
273 sock_hold(s);
274 goto found;
275 }
276 s = NULL;
277found:
278 read_unlock_bh(&x25_list_lock);
279 return s;
280}
281
282/*
283 * Find a connected X.25 socket given my LCI and neighbour.
284 */
285static struct sock *__x25_find_socket(unsigned int lci, struct x25_neigh *nb)
286{
287 struct sock *s;
288 struct hlist_node *node;
289
290 sk_for_each(s, node, &x25_list)
291 if (x25_sk(s)->lci == lci && x25_sk(s)->neighbour == nb) {
292 sock_hold(s);
293 goto found;
294 }
295 s = NULL;
296found:
297 return s;
298}
299
300struct sock *x25_find_socket(unsigned int lci, struct x25_neigh *nb)
301{
302 struct sock *s;
303
304 read_lock_bh(&x25_list_lock);
305 s = __x25_find_socket(lci, nb);
306 read_unlock_bh(&x25_list_lock);
307 return s;
308}
309
310/*
311 * Find a unique LCI for a given device.
312 */
313static unsigned int x25_new_lci(struct x25_neigh *nb)
314{
315 unsigned int lci = 1;
316 struct sock *sk;
317
318 read_lock_bh(&x25_list_lock);
319
320 while ((sk = __x25_find_socket(lci, nb)) != NULL) {
321 sock_put(sk);
322 if (++lci == 4096) {
323 lci = 0;
324 break;
325 }
326 }
327
328 read_unlock_bh(&x25_list_lock);
329 return lci;
330}
331
332/*
333 * Deferred destroy.
334 */
335void x25_destroy_socket(struct sock *);
336
337/*
338 * handler for deferred kills.
339 */
340static void x25_destroy_timer(unsigned long data)
341{
342 x25_destroy_socket((struct sock *)data);
343}
344
345/*
346 * This is called from user mode and the timers. Thus it protects itself
347 * against interrupt users but doesn't worry about being called during
348 * work. Once it is removed from the queue no interrupt or bottom half
349 * will touch it and we are (fairly 8-) ) safe.
350 * Not static as it's used by the timer
351 */
352void x25_destroy_socket(struct sock *sk)
353{
354 struct sk_buff *skb;
355
356 sock_hold(sk);
357 lock_sock(sk);
358 x25_stop_heartbeat(sk);
359 x25_stop_timer(sk);
360
361 x25_remove_socket(sk);
362 x25_clear_queues(sk); /* Flush the queues */
363
364 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
365 if (skb->sk != sk) { /* A pending connection */
366 /*
367 * Queue the unaccepted socket for death
368 */
369 sock_set_flag(skb->sk, SOCK_DEAD);
370 x25_start_heartbeat(skb->sk);
371 x25_sk(skb->sk)->state = X25_STATE_0;
372 }
373
374 kfree_skb(skb);
375 }
376
377 if (atomic_read(&sk->sk_wmem_alloc) ||
378 atomic_read(&sk->sk_rmem_alloc)) {
379 /* Defer: outstanding buffers */
380 sk->sk_timer.expires = jiffies + 10 * HZ;
381 sk->sk_timer.function = x25_destroy_timer;
382 sk->sk_timer.data = (unsigned long)sk;
383 add_timer(&sk->sk_timer);
384 } else {
385 /* drop last reference so sock_put will free */
386 __sock_put(sk);
387 }
388
389 release_sock(sk);
390 sock_put(sk);
391}
392
393/*
394 * Handling for system calls applied via the various interfaces to a
395 * X.25 socket object.
396 */
397
398static int x25_setsockopt(struct socket *sock, int level, int optname,
399 char __user *optval, int optlen)
400{
401 int opt;
402 struct sock *sk = sock->sk;
403 int rc = -ENOPROTOOPT;
404
405 if (level != SOL_X25 || optname != X25_QBITINCL)
406 goto out;
407
408 rc = -EINVAL;
409 if (optlen < sizeof(int))
410 goto out;
411
412 rc = -EFAULT;
413 if (get_user(opt, (int __user *)optval))
414 goto out;
415
416 x25_sk(sk)->qbitincl = !!opt;
417 rc = 0;
418out:
419 return rc;
420}
421
422static int x25_getsockopt(struct socket *sock, int level, int optname,
423 char __user *optval, int __user *optlen)
424{
425 struct sock *sk = sock->sk;
426 int val, len, rc = -ENOPROTOOPT;
f8e1d201 427
1da177e4
LT		 428 if (level != SOL_X25 || optname != X25_QBITINCL)
429 goto out;
430
431 rc = -EFAULT;
432 if (get_user(len, optlen))
433 goto out;
434
435 len = min_t(unsigned int, len, sizeof(int));
436
437 rc = -EINVAL;
438 if (len < 0)
439 goto out;
f8e1d201 440
1da177e4
LT		 441 rc = -EFAULT;
442 if (put_user(len, optlen))
443 goto out;
444
445 val = x25_sk(sk)->qbitincl;
446 rc = copy_to_user(optval, &val, len) ? -EFAULT : 0;
447out:
448 return rc;
449}
450
451static int x25_listen(struct socket *sock, int backlog)
452{
453 struct sock *sk = sock->sk;
454 int rc = -EOPNOTSUPP;
455
456 if (sk->sk_state != TCP_LISTEN) {
457 memset(&x25_sk(sk)->dest_addr, 0, X25_ADDR_LEN);
458 sk->sk_max_ack_backlog = backlog;
459 sk->sk_state = TCP_LISTEN;
460 rc = 0;
461 }
462
463 return rc;
464}
465
466static struct proto x25_proto = {
467 .name = "X25",
468 .owner = THIS_MODULE,
469 .obj_size = sizeof(struct x25_sock),
470};
471
1b8d7ae4 472static struct sock *x25_alloc_socket(struct net *net)
1da177e4
LT		 473{
474 struct x25_sock *x25;
6257ff21 475 struct sock *sk = sk_alloc(net, AF_X25, GFP_ATOMIC, &x25_proto);
1da177e4
LT		 476
477 if (!sk)
478 goto out;
479
480 sock_init_data(NULL, sk);
481
482 x25 = x25_sk(sk);
483 skb_queue_head_init(&x25->ack_queue);
484 skb_queue_head_init(&x25->fragment_queue);
485 skb_queue_head_init(&x25->interrupt_in_queue);
486 skb_queue_head_init(&x25->interrupt_out_queue);
487out:
488 return sk;
489}
490
1b8d7ae4 491static int x25_create(struct net *net, struct socket *sock, int protocol)
1da177e4
LT		 492{
493 struct sock *sk;
494 struct x25_sock *x25;
495 int rc = -ESOCKTNOSUPPORT;
496
1b8d7ae4
EB		 497 if (net != &init_net)
498 return -EAFNOSUPPORT;
499
1da177e4
LT		 500 if (sock->type != SOCK_SEQPACKET || protocol)
501 goto out;
502
503 rc = -ENOMEM;
1b8d7ae4 504 if ((sk = x25_alloc_socket(net)) == NULL)
1da177e4
LT		 505 goto out;
506
507 x25 = x25_sk(sk);
508
509 sock_init_data(sock, sk);
510
511 x25_init_timers(sk);
512
513 sock->ops = &x25_proto_ops;
514 sk->sk_protocol = protocol;
515 sk->sk_backlog_rcv = x25_backlog_rcv;
516
517 x25->t21 = sysctl_x25_call_request_timeout;
518 x25->t22 = sysctl_x25_reset_request_timeout;
519 x25->t23 = sysctl_x25_clear_request_timeout;
520 x25->t2 = sysctl_x25_ack_holdback_timeout;
521 x25->state = X25_STATE_0;
cb65d506 522 x25->cudmatchlength = 0;
ebc3f64b
SP		 523 x25->accptapprv = X25_DENY_ACCPT_APPRV; /* normally no cud */
524 /* on call accept */
1da177e4
LT		 525
526 x25->facilities.winsize_in = X25_DEFAULT_WINDOW_SIZE;
527 x25->facilities.winsize_out = X25_DEFAULT_WINDOW_SIZE;
528 x25->facilities.pacsize_in = X25_DEFAULT_PACKET_SIZE;
529 x25->facilities.pacsize_out = X25_DEFAULT_PACKET_SIZE;
530 x25->facilities.throughput = X25_DEFAULT_THROUGHPUT;
531 x25->facilities.reverse = X25_DEFAULT_REVERSE;
f8e1d201
YH		 532 x25->dte_facilities.calling_len = 0;
533 x25->dte_facilities.called_len = 0;
534 memset(x25->dte_facilities.called_ae, '\0',
535 sizeof(x25->dte_facilities.called_ae));
536 memset(x25->dte_facilities.calling_ae, '\0',
537 sizeof(x25->dte_facilities.calling_ae));
a64b7b93 538
1da177e4
LT		 539 rc = 0;
540out:
541 return rc;
542}
543
544static struct sock *x25_make_new(struct sock *osk)
545{
546 struct sock *sk = NULL;
547 struct x25_sock *x25, *ox25;
548
549 if (osk->sk_type != SOCK_SEQPACKET)
550 goto out;
551
3b1e0a65 552 if ((sk = x25_alloc_socket(sock_net(osk))) == NULL)
1da177e4
LT		 553 goto out;
554
555 x25 = x25_sk(sk);
556
557 sk->sk_type = osk->sk_type;
1da177e4
LT		 558 sk->sk_priority = osk->sk_priority;
559 sk->sk_protocol = osk->sk_protocol;
560 sk->sk_rcvbuf = osk->sk_rcvbuf;
561 sk->sk_sndbuf = osk->sk_sndbuf;
562 sk->sk_state = TCP_ESTABLISHED;
1da177e4 563 sk->sk_backlog_rcv = osk->sk_backlog_rcv;
a20a8554 564 sock_copy_flags(sk, osk);
1da177e4
LT		 565
566 ox25 = x25_sk(osk);
567 x25->t21 = ox25->t21;
568 x25->t22 = ox25->t22;
569 x25->t23 = ox25->t23;
570 x25->t2 = ox25->t2;
571 x25->facilities = ox25->facilities;
572 x25->qbitincl = ox25->qbitincl;
a64b7b93 573 x25->dte_facilities = ox25->dte_facilities;
cb65d506 574 x25->cudmatchlength = ox25->cudmatchlength;
ebc3f64b 575 x25->accptapprv = ox25->accptapprv;
1da177e4
LT		 576
577 x25_init_timers(sk);
578out:
579 return sk;
580}
581
582static int x25_release(struct socket *sock)
583{
584 struct sock *sk = sock->sk;
585 struct x25_sock *x25;
586
587 if (!sk)
588 goto out;
589
590 x25 = x25_sk(sk);
591
592 switch (x25->state) {
593
594 case X25_STATE_0:
595 case X25_STATE_2:
596 x25_disconnect(sk, 0, 0, 0);
597 x25_destroy_socket(sk);
598 goto out;
599
600 case X25_STATE_1:
601 case X25_STATE_3:
602 case X25_STATE_4:
603 x25_clear_queues(sk);
604 x25_write_internal(sk, X25_CLEAR_REQUEST);
605 x25_start_t23timer(sk);
606 x25->state = X25_STATE_2;
607 sk->sk_state = TCP_CLOSE;
608 sk->sk_shutdown |= SEND_SHUTDOWN;
609 sk->sk_state_change(sk);
610 sock_set_flag(sk, SOCK_DEAD);
611 sock_set_flag(sk, SOCK_DESTROY);
612 break;
613 }
614
c751e4f8 615 sock_orphan(sk);
1da177e4
LT		 616out:
617 return 0;
618}
619
620static int x25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
621{
622 struct sock *sk = sock->sk;
623 struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr;
624
625 if (!sock_flag(sk, SOCK_ZAPPED) ||
626 addr_len != sizeof(struct sockaddr_x25) ||
627 addr->sx25_family != AF_X25)
628 return -EINVAL;
629
630 x25_sk(sk)->source_addr = addr->sx25_addr;
631 x25_insert_socket(sk);
632 sock_reset_flag(sk, SOCK_ZAPPED);
633 SOCK_DEBUG(sk, "x25_bind: socket is bound\n");
634
635 return 0;
636}
637
638static int x25_wait_for_connection_establishment(struct sock *sk)
639{
640 DECLARE_WAITQUEUE(wait, current);
f8e1d201 641 int rc;
1da177e4
LT		 642
643 add_wait_queue_exclusive(sk->sk_sleep, &wait);
644 for (;;) {
645 __set_current_state(TASK_INTERRUPTIBLE);
646 rc = -ERESTARTSYS;
647 if (signal_pending(current))
648 break;
649 rc = sock_error(sk);
650 if (rc) {
651 sk->sk_socket->state = SS_UNCONNECTED;
652 break;
653 }
654 rc = 0;
655 if (sk->sk_state != TCP_ESTABLISHED) {
656 release_sock(sk);
657 schedule();
658 lock_sock(sk);
659 } else
660 break;
661 }
662 __set_current_state(TASK_RUNNING);
663 remove_wait_queue(sk->sk_sleep, &wait);
664 return rc;
665}
666
667static int x25_connect(struct socket *sock, struct sockaddr *uaddr,
668 int addr_len, int flags)
669{
670 struct sock *sk = sock->sk;
671 struct x25_sock *x25 = x25_sk(sk);
672 struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr;
673 struct x25_route *rt;
674 int rc = 0;
675
676 lock_sock(sk);
677 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
678 sock->state = SS_CONNECTED;
679 goto out; /* Connect completed during a ERESTARTSYS event */
680 }
681
682 rc = -ECONNREFUSED;
683 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
684 sock->state = SS_UNCONNECTED;
685 goto out;
686 }
687
688 rc = -EISCONN; /* No reconnect on a seqpacket socket */
689 if (sk->sk_state == TCP_ESTABLISHED)
690 goto out;
691
f8e1d201 692 sk->sk_state = TCP_CLOSE;
1da177e4
LT		 693 sock->state = SS_UNCONNECTED;
694
695 rc = -EINVAL;
696 if (addr_len != sizeof(struct sockaddr_x25) ||
697 addr->sx25_family != AF_X25)
698 goto out;
699
700 rc = -ENETUNREACH;
701 rt = x25_get_route(&addr->sx25_addr);
702 if (!rt)
703 goto out;
704
705 x25->neighbour = x25_get_neigh(rt->dev);
706 if (!x25->neighbour)
707 goto out_put_route;
708
709 x25_limit_facilities(&x25->facilities, x25->neighbour);
710
711 x25->lci = x25_new_lci(x25->neighbour);
712 if (!x25->lci)
713 goto out_put_neigh;
714
715 rc = -EINVAL;
716 if (sock_flag(sk, SOCK_ZAPPED)) /* Must bind first - autobinding does not work */
717 goto out_put_neigh;
718
719 if (!strcmp(x25->source_addr.x25_addr, null_x25_address.x25_addr))
720 memset(&x25->source_addr, '\0', X25_ADDR_LEN);
721
722 x25->dest_addr = addr->sx25_addr;
723
724 /* Move to connecting socket, start sending Connect Requests */
725 sock->state = SS_CONNECTING;
726 sk->sk_state = TCP_SYN_SENT;
727
728 x25->state = X25_STATE_1;
729
730 x25_write_internal(sk, X25_CALL_REQUEST);
731
732 x25_start_heartbeat(sk);
733 x25_start_t21timer(sk);
734
735 /* Now the loop */
736 rc = -EINPROGRESS;
737 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
738 goto out_put_neigh;
739
740 rc = x25_wait_for_connection_establishment(sk);
741 if (rc)
742 goto out_put_neigh;
743
744 sock->state = SS_CONNECTED;
745 rc = 0;
746out_put_neigh:
747 if (rc)
748 x25_neigh_put(x25->neighbour);
749out_put_route:
750 x25_route_put(rt);
751out:
752 release_sock(sk);
753 return rc;
754}
755
bac37ec8 756static int x25_wait_for_data(struct sock *sk, long timeout)
1da177e4
LT		 757{
758 DECLARE_WAITQUEUE(wait, current);
759 int rc = 0;
760
761 add_wait_queue_exclusive(sk->sk_sleep, &wait);
762 for (;;) {
763 __set_current_state(TASK_INTERRUPTIBLE);
764 if (sk->sk_shutdown & RCV_SHUTDOWN)
765 break;
766 rc = -ERESTARTSYS;
767 if (signal_pending(current))
768 break;
769 rc = -EAGAIN;
770 if (!timeout)
771 break;
772 rc = 0;
773 if (skb_queue_empty(&sk->sk_receive_queue)) {
774 release_sock(sk);
775 timeout = schedule_timeout(timeout);
776 lock_sock(sk);
777 } else
778 break;
779 }
780 __set_current_state(TASK_RUNNING);
781 remove_wait_queue(sk->sk_sleep, &wait);
782 return rc;
783}
f8e1d201 784
1da177e4
LT		 785static int x25_accept(struct socket *sock, struct socket *newsock, int flags)
786{
787 struct sock *sk = sock->sk;
788 struct sock *newsk;
789 struct sk_buff *skb;
790 int rc = -EINVAL;
791
792 if (!sk || sk->sk_state != TCP_LISTEN)
793 goto out;
794
795 rc = -EOPNOTSUPP;
796 if (sk->sk_type != SOCK_SEQPACKET)
797 goto out;
798
799 lock_sock(sk);
800 rc = x25_wait_for_data(sk, sk->sk_rcvtimeo);
801 if (rc)
802 goto out2;
803 skb = skb_dequeue(&sk->sk_receive_queue);
804 rc = -EINVAL;
805 if (!skb->sk)
806 goto out2;
807 newsk = skb->sk;
b61d38e0 808 sock_graft(newsk, newsock);
1da177e4
LT		 809
810 /* Now attach up the new socket */
811 skb->sk = NULL;
812 kfree_skb(skb);
813 sk->sk_ack_backlog--;
1da177e4
LT		 814 newsock->state = SS_CONNECTED;
815 rc = 0;
816out2:
817 release_sock(sk);
818out:
819 return rc;
820}
821
822static int x25_getname(struct socket *sock, struct sockaddr *uaddr,
823 int *uaddr_len, int peer)
824{
825 struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)uaddr;
826 struct sock *sk = sock->sk;
827 struct x25_sock *x25 = x25_sk(sk);
828
829 if (peer) {
830 if (sk->sk_state != TCP_ESTABLISHED)
831 return -ENOTCONN;
832 sx25->sx25_addr = x25->dest_addr;
833 } else
834 sx25->sx25_addr = x25->source_addr;
835
836 sx25->sx25_family = AF_X25;
837 *uaddr_len = sizeof(*sx25);
838
839 return 0;
840}
f8e1d201 841
1da177e4
LT		 842int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *nb,
843 unsigned int lci)
844{
845 struct sock *sk;
846 struct sock *make;
847 struct x25_sock *makex25;
848 struct x25_address source_addr, dest_addr;
849 struct x25_facilities facilities;
a64b7b93 850 struct x25_dte_facilities dte_facilities;
95a9dc43 851 int len, addr_len, rc;
1da177e4
LT		 852
853 /*
854 * Remove the LCI and frame type.
855 */
856 skb_pull(skb, X25_STD_MIN_LEN);
857
858 /*
859 * Extract the X.25 addresses and convert them to ASCII strings,
860 * and remove them.
861 */
95a9dc43
AH		 862 addr_len = x25_addr_ntoa(skb->data, &source_addr, &dest_addr);
863 skb_pull(skb, addr_len);
1da177e4
LT		 864
865 /*
866 * Get the length of the facilities, skip past them for the moment
867 * get the call user data because this is needed to determine
868 * the correct listener
869 */
870 len = skb->data[0] + 1;
871 skb_pull(skb,len);
872
1da177e4
LT		 873 /*
874 * Find a listener for the particular address/cud pair.
875 */
cb65d506
SP		 876 sk = x25_find_listener(&source_addr,skb);
877 skb_push(skb,len);
1da177e4 878
95a9dc43
AH		 879 if (sk != NULL && sk_acceptq_is_full(sk)) {
880 goto out_sock_put;
881 }
882
1da177e4 883 /*
95a9dc43
AH		 884 * We dont have any listeners for this incoming call.
885 * Try forwarding it.
1da177e4 886 */
95a9dc43
AH		 887 if (sk == NULL) {
888 skb_push(skb, addr_len + X25_STD_MIN_LEN);
39e21c0d
AH		 889 if (sysctl_x25_forward &&
890 x25_forward_call(&dest_addr, nb, skb, lci) > 0)
95a9dc43
AH		 891 {
892 /* Call was forwarded, dont process it any more */
893 kfree_skb(skb);
894 rc = 1;
895 goto out;
896 } else {
897 /* No listeners, can't forward, clear the call */
898 goto out_clear_request;
899 }
900 }
1da177e4
LT		 901
902 /*
903 * Try to reach a compromise on the requested facilities.
904 */
a64b7b93
SP		 905 len = x25_negotiate_facilities(skb, sk, &facilities, &dte_facilities);
906 if (len == -1)
1da177e4
LT		 907 goto out_sock_put;
908
909 /*
910 * current neighbour/link might impose additional limits
911 * on certain facilties
912 */
913
914 x25_limit_facilities(&facilities, nb);
915
916 /*
917 * Try to create a new socket.
918 */
919 make = x25_make_new(sk);
920 if (!make)
921 goto out_sock_put;
922
923 /*
924 * Remove the facilities
925 */
926 skb_pull(skb, len);
927
928 skb->sk = make;
929 make->sk_state = TCP_ESTABLISHED;
930
931 makex25 = x25_sk(make);
932 makex25->lci = lci;
933 makex25->dest_addr = dest_addr;
934 makex25->source_addr = source_addr;
935 makex25->neighbour = nb;
936 makex25->facilities = facilities;
a64b7b93 937 makex25->dte_facilities= dte_facilities;
1da177e4 938 makex25->vc_facil_mask = x25_sk(sk)->vc_facil_mask;
cb65d506
SP		 939 /* ensure no reverse facil on accept */
940 makex25->vc_facil_mask &= ~X25_MASK_REVERSE;
a64b7b93
SP		 941 /* ensure no calling address extension on accept */
942 makex25->vc_facil_mask &= ~X25_MASK_CALLING_AE;
cb65d506 943 makex25->cudmatchlength = x25_sk(sk)->cudmatchlength;
1da177e4 944
ebc3f64b
SP		 945 /* Normally all calls are accepted immediatly */
946 if(makex25->accptapprv & X25_DENY_ACCPT_APPRV) {
947 x25_write_internal(make, X25_CALL_ACCEPTED);
948 makex25->state = X25_STATE_3;
949 }
1da177e4 950
cb65d506
SP		 951 /*
952 * Incoming Call User Data.
953 */
8db09f26
RK		 954 skb_copy_from_linear_data(skb, makex25->calluserdata.cuddata, skb->len);
955 makex25->calluserdata.cudlength = skb->len;
cb65d506 956
1da177e4
LT		 957 sk->sk_ack_backlog++;
958
959 x25_insert_socket(make);
960
961 skb_queue_head(&sk->sk_receive_queue, skb);
962
963 x25_start_heartbeat(make);
964
965 if (!sock_flag(sk, SOCK_DEAD))
966 sk->sk_data_ready(sk, skb->len);
967 rc = 1;
968 sock_put(sk);
969out:
970 return rc;
971out_sock_put:
972 sock_put(sk);
973out_clear_request:
974 rc = 0;
975 x25_transmit_clear_request(nb, lci, 0x01);
976 goto out;
977}
978
979static int x25_sendmsg(struct kiocb *iocb, struct socket *sock,
980 struct msghdr *msg, size_t len)
981{
982 struct sock *sk = sock->sk;
983 struct x25_sock *x25 = x25_sk(sk);
984 struct sockaddr_x25 *usx25 = (struct sockaddr_x25 *)msg->msg_name;
985 struct sockaddr_x25 sx25;
986 struct sk_buff *skb;
987 unsigned char *asmptr;
988 int noblock = msg->msg_flags & MSG_DONTWAIT;
989 size_t size;
990 int qbit = 0, rc = -EINVAL;
991
992 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_OOB|MSG_EOR|MSG_CMSG_COMPAT))
993 goto out;
994
995 /* we currently don't support segmented records at the user interface */
996 if (!(msg->msg_flags & (MSG_EOR|MSG_OOB)))
997 goto out;
998
999 rc = -EADDRNOTAVAIL;
1000 if (sock_flag(sk, SOCK_ZAPPED))
1001 goto out;
1002
1003 rc = -EPIPE;
1004 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1005 send_sig(SIGPIPE, current, 0);
1006 goto out;
1007 }
1008
1009 rc = -ENETUNREACH;
1010 if (!x25->neighbour)
1011 goto out;
1012
1013 if (usx25) {
1014 rc = -EINVAL;
1015 if (msg->msg_namelen < sizeof(sx25))
1016 goto out;
1017 memcpy(&sx25, usx25, sizeof(sx25));
1018 rc = -EISCONN;
1019 if (strcmp(x25->dest_addr.x25_addr, sx25.sx25_addr.x25_addr))
1020 goto out;
1021 rc = -EINVAL;
1022 if (sx25.sx25_family != AF_X25)
1023 goto out;
1024 } else {
1025 /*
1026 * FIXME 1003.1g - if the socket is like this because
1027 * it has become closed (not started closed) we ought
1028 * to SIGPIPE, EPIPE;
1029 */
1030 rc = -ENOTCONN;
1031 if (sk->sk_state != TCP_ESTABLISHED)
1032 goto out;
1033
1034 sx25.sx25_family = AF_X25;
1035 sx25.sx25_addr = x25->dest_addr;
1036 }
1037
1038 SOCK_DEBUG(sk, "x25_sendmsg: sendto: Addresses built.\n");
1039
1040 /* Build a packet */
1041 SOCK_DEBUG(sk, "x25_sendmsg: sendto: building packet.\n");
1042
1043 if ((msg->msg_flags & MSG_OOB) && len > 32)
1044 len = 32;
1045
1046 size = len + X25_MAX_L2_LEN + X25_EXT_MIN_LEN;
1047
1048 skb = sock_alloc_send_skb(sk, size, noblock, &rc);
1049 if (!skb)
1050 goto out;
1051 X25_SKB_CB(skb)->flags = msg->msg_flags;
1052
1053 skb_reserve(skb, X25_MAX_L2_LEN + X25_EXT_MIN_LEN);
1054
1055 /*
1056 * Put the data on the end
1057 */
1058 SOCK_DEBUG(sk, "x25_sendmsg: Copying user data\n");
1059
eeeb0374
ACM		 1060 skb_reset_transport_header(skb);
1061 skb_put(skb, len);
1da177e4 1062
eeeb0374 1063 rc = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1da177e4
LT		 1064 if (rc)
1065 goto out_kfree_skb;
1066
1067 /*
1068 * If the Q BIT Include socket option is in force, the first
1069 * byte of the user data is the logical value of the Q Bit.
1070 */
1071 if (x25->qbitincl) {
1072 qbit = skb->data[0];
1073 skb_pull(skb, 1);
1074 }
1075
1076 /*
1077 * Push down the X.25 header
1078 */
1079 SOCK_DEBUG(sk, "x25_sendmsg: Building X.25 Header.\n");
1080
1081 if (msg->msg_flags & MSG_OOB) {
1082 if (x25->neighbour->extended) {
1083 asmptr = skb_push(skb, X25_STD_MIN_LEN);
1084 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ;
1085 *asmptr++ = (x25->lci >> 0) & 0xFF;
1086 *asmptr++ = X25_INTERRUPT;
1087 } else {
1088 asmptr = skb_push(skb, X25_STD_MIN_LEN);
1089 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ;
1090 *asmptr++ = (x25->lci >> 0) & 0xFF;
1091 *asmptr++ = X25_INTERRUPT;
1092 }
1093 } else {
1094 if (x25->neighbour->extended) {
1095 /* Build an Extended X.25 header */
1096 asmptr = skb_push(skb, X25_EXT_MIN_LEN);
1097 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ;
1098 *asmptr++ = (x25->lci >> 0) & 0xFF;
1099 *asmptr++ = X25_DATA;
1100 *asmptr++ = X25_DATA;
1101 } else {
1102 /* Build an Standard X.25 header */
1103 asmptr = skb_push(skb, X25_STD_MIN_LEN);
1104 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ;
1105 *asmptr++ = (x25->lci >> 0) & 0xFF;
1106 *asmptr++ = X25_DATA;
1107 }
1108
1109 if (qbit)
1110 skb->data[0] |= X25_Q_BIT;
1111 }
1112
1113 SOCK_DEBUG(sk, "x25_sendmsg: Built header.\n");
1114 SOCK_DEBUG(sk, "x25_sendmsg: Transmitting buffer\n");
1115
1116 rc = -ENOTCONN;
1117 if (sk->sk_state != TCP_ESTABLISHED)
1118 goto out_kfree_skb;
1119
1120 if (msg->msg_flags & MSG_OOB)
1121 skb_queue_tail(&x25->interrupt_out_queue, skb);
1122 else {
8db09f26
RK		 1123 rc = x25_output(sk, skb);
1124 len = rc;
1125 if (rc < 0)
1da177e4
LT		 1126 kfree_skb(skb);
1127 else if (x25->qbitincl)
1128 len++;
1129 }
1130
1131 /*
1132 * lock_sock() is currently only used to serialize this x25_kick()
1133 * against input-driven x25_kick() calls. It currently only blocks
1134 * incoming packets for this socket and does not protect against
1135 * any other socket state changes and is not called from anywhere
1136 * else. As x25_kick() cannot block and as long as all socket
1137 * operations are BKL-wrapped, we don't need take to care about
1138 * purging the backlog queue in x25_release().
1139 *
1140 * Using lock_sock() to protect all socket operations entirely
1141 * (and making the whole x25 stack SMP aware) unfortunately would
1142 * require major changes to {send,recv}msg and skb allocation methods.
1143 * -> 2.5 ;)
1144 */
1145 lock_sock(sk);
1146 x25_kick(sk);
1147 release_sock(sk);
1148 rc = len;
1149out:
1150 return rc;
1151out_kfree_skb:
1152 kfree_skb(skb);
1153 goto out;
1154}
1155
1156
1157static int x25_recvmsg(struct kiocb *iocb, struct socket *sock,
1158 struct msghdr *msg, size_t size,
1159 int flags)
1160{
1161 struct sock *sk = sock->sk;
1162 struct x25_sock *x25 = x25_sk(sk);
1163 struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name;
1164 size_t copied;
1165 int qbit;
1166 struct sk_buff *skb;
1167 unsigned char *asmptr;
1168 int rc = -ENOTCONN;
1169
1170 /*
1171 * This works for seqpacket too. The receiver has ordered the queue for
1172 * us! We do one quick check first though
1173 */
1174 if (sk->sk_state != TCP_ESTABLISHED)
1175 goto out;
1176
1177 if (flags & MSG_OOB) {
1178 rc = -EINVAL;
1179 if (sock_flag(sk, SOCK_URGINLINE) ||
1180 !skb_peek(&x25->interrupt_in_queue))
1181 goto out;
1182
1183 skb = skb_dequeue(&x25->interrupt_in_queue);
1184
1185 skb_pull(skb, X25_STD_MIN_LEN);
1186
1187 /*
1188 * No Q bit information on Interrupt data.
1189 */
1190 if (x25->qbitincl) {
1191 asmptr = skb_push(skb, 1);
1192 *asmptr = 0x00;
1193 }
1194
1195 msg->msg_flags |= MSG_OOB;
1196 } else {
1197 /* Now we can treat all alike */
1198 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1199 flags & MSG_DONTWAIT, &rc);
1200 if (!skb)
1201 goto out;
1202
1203 qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT;
1204
1205 skb_pull(skb, x25->neighbour->extended ?
1206 X25_EXT_MIN_LEN : X25_STD_MIN_LEN);
1207
1208 if (x25->qbitincl) {
1209 asmptr = skb_push(skb, 1);
1210 *asmptr = qbit;
1211 }
1212 }
1213
badff6d0 1214 skb_reset_transport_header(skb);
1da177e4
LT		 1215 copied = skb->len;
1216
1217 if (copied > size) {
1218 copied = size;
1219 msg->msg_flags |= MSG_TRUNC;
1220 }
1221
f8e1d201 1222 /* Currently, each datagram always contains a complete record */
1da177e4
LT		 1223 msg->msg_flags |= MSG_EOR;
1224
1225 rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1226 if (rc)
1227 goto out_free_dgram;
1228
1229 if (sx25) {
1230 sx25->sx25_family = AF_X25;
1231 sx25->sx25_addr = x25->dest_addr;
1232 }
1233
1234 msg->msg_namelen = sizeof(struct sockaddr_x25);
1235
1236 lock_sock(sk);
1237 x25_check_rbuf(sk);
1238 release_sock(sk);
1239 rc = copied;
1240out_free_dgram:
1241 skb_free_datagram(sk, skb);
1242out:
1243 return rc;
1244}
1245
1246
1247static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1248{
1249 struct sock *sk = sock->sk;
1250 struct x25_sock *x25 = x25_sk(sk);
1251 void __user *argp = (void __user *)arg;
1252 int rc;
1253
1254 switch (cmd) {
1255 case TIOCOUTQ: {
1256 int amount = sk->sk_sndbuf -
1257 atomic_read(&sk->sk_wmem_alloc);
1258 if (amount < 0)
1259 amount = 0;
1260 rc = put_user(amount, (unsigned int __user *)argp);
1261 break;
1262 }
1263
1264 case TIOCINQ: {
1265 struct sk_buff *skb;
1266 int amount = 0;
1267 /*
1268 * These two are safe on a single CPU system as
1269 * only user tasks fiddle here
1270 */
1271 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1272 amount = skb->len;
1273 rc = put_user(amount, (unsigned int __user *)argp);
1274 break;
1275 }
1276
1277 case SIOCGSTAMP:
1278 rc = -EINVAL;
1279 if (sk)
f8e1d201
YH		 1280 rc = sock_get_timestamp(sk,
1281 (struct timeval __user *)argp);
1da177e4 1282 break;
ae40eb1e
ED		 1283 case SIOCGSTAMPNS:
1284 rc = -EINVAL;
1285 if (sk)
1286 rc = sock_get_timestampns(sk,
1287 (struct timespec __user *)argp);
1288 break;
1da177e4
LT		 1289 case SIOCGIFADDR:
1290 case SIOCSIFADDR:
1291 case SIOCGIFDSTADDR:
1292 case SIOCSIFDSTADDR:
1293 case SIOCGIFBRDADDR:
1294 case SIOCSIFBRDADDR:
1295 case SIOCGIFNETMASK:
1296 case SIOCSIFNETMASK:
1297 case SIOCGIFMETRIC:
1298 case SIOCSIFMETRIC:
1299 rc = -EINVAL;
1300 break;
1301 case SIOCADDRT:
1302 case SIOCDELRT:
1303 rc = -EPERM;
1304 if (!capable(CAP_NET_ADMIN))
1305 break;
1306 rc = x25_route_ioctl(cmd, argp);
1307 break;
1308 case SIOCX25GSUBSCRIP:
1309 rc = x25_subscr_ioctl(cmd, argp);
1310 break;
1311 case SIOCX25SSUBSCRIP:
1312 rc = -EPERM;
1313 if (!capable(CAP_NET_ADMIN))
1314 break;
1315 rc = x25_subscr_ioctl(cmd, argp);
1316 break;
1317 case SIOCX25GFACILITIES: {
1318 struct x25_facilities fac = x25->facilities;
1319 rc = copy_to_user(argp, &fac,
1320 sizeof(fac)) ? -EFAULT : 0;
1321 break;
1322 }
1323
1324 case SIOCX25SFACILITIES: {
1325 struct x25_facilities facilities;
1326 rc = -EFAULT;
1327 if (copy_from_user(&facilities, argp,
1328 sizeof(facilities)))
1329 break;
1330 rc = -EINVAL;
1331 if (sk->sk_state != TCP_LISTEN &&
1332 sk->sk_state != TCP_CLOSE)
1333 break;
1334 if (facilities.pacsize_in < X25_PS16 ||
1335 facilities.pacsize_in > X25_PS4096)
1336 break;
1337 if (facilities.pacsize_out < X25_PS16 ||
1338 facilities.pacsize_out > X25_PS4096)
1339 break;
1340 if (facilities.winsize_in < 1 ||
1341 facilities.winsize_in > 127)
1342 break;
1343 if (facilities.throughput < 0x03 ||
1344 facilities.throughput > 0xDD)
1345 break;
ebc3f64b
SP		 1346 if (facilities.reverse &&
1347 (facilities.reverse | 0x81)!= 0x81)
1da177e4
LT		 1348 break;
1349 x25->facilities = facilities;
1350 rc = 0;
1351 break;
1352 }
1353
a64b7b93 1354 case SIOCX25GDTEFACILITIES: {
f8e1d201 1355 rc = copy_to_user(argp, &x25->dte_facilities,
a64b7b93
SP		 1356 sizeof(x25->dte_facilities));
1357 if (rc)
1358 rc = -EFAULT;
f8e1d201
YH		 1359 break;
1360 }
a64b7b93 1361
f8e1d201
YH		 1362 case SIOCX25SDTEFACILITIES: {
1363 struct x25_dte_facilities dtefacs;
1364 rc = -EFAULT;
1365 if (copy_from_user(&dtefacs, argp, sizeof(dtefacs)))
a64b7b93
SP		 1366 break;
1367 rc = -EINVAL;
1368 if (sk->sk_state != TCP_LISTEN &&
1369 sk->sk_state != TCP_CLOSE)
1370 break;
1371 if (dtefacs.calling_len > X25_MAX_AE_LEN)
1372 break;
1373 if (dtefacs.calling_ae == NULL)
1374 break;
1375 if (dtefacs.called_len > X25_MAX_AE_LEN)
1376 break;
1377 if (dtefacs.called_ae == NULL)
1378 break;
1379 x25->dte_facilities = dtefacs;
1380 rc = 0;
1381 break;
1382 }
1383
1da177e4
LT		 1384 case SIOCX25GCALLUSERDATA: {
1385 struct x25_calluserdata cud = x25->calluserdata;
1386 rc = copy_to_user(argp, &cud,
1387 sizeof(cud)) ? -EFAULT : 0;
1388 break;
1389 }
1390
1391 case SIOCX25SCALLUSERDATA: {
1392 struct x25_calluserdata calluserdata;
1393
1394 rc = -EFAULT;
1395 if (copy_from_user(&calluserdata, argp,
1396 sizeof(calluserdata)))
1397 break;
1398 rc = -EINVAL;
1399 if (calluserdata.cudlength > X25_MAX_CUD_LEN)
1400 break;
1401 x25->calluserdata = calluserdata;
1402 rc = 0;
1403 break;
1404 }
1405
1406 case SIOCX25GCAUSEDIAG: {
1407 struct x25_causediag causediag;
1408 causediag = x25->causediag;
1409 rc = copy_to_user(argp, &causediag,
1410 sizeof(causediag)) ? -EFAULT : 0;
1411 break;
1412 }
1413
cb65d506
SP		 1414 case SIOCX25SCUDMATCHLEN: {
1415 struct x25_subaddr sub_addr;
1416 rc = -EINVAL;
1417 if(sk->sk_state != TCP_CLOSE)
1418 break;
1419 rc = -EFAULT;
1420 if (copy_from_user(&sub_addr, argp,
1421 sizeof(sub_addr)))
1422 break;
f8e1d201 1423 rc = -EINVAL;
cb65d506
SP		 1424 if(sub_addr.cudmatchlength > X25_MAX_CUD_LEN)
1425 break;
1426 x25->cudmatchlength = sub_addr.cudmatchlength;
1427 rc = 0;
1428 break;
1429 }
1430
ebc3f64b
SP		 1431 case SIOCX25CALLACCPTAPPRV: {
1432 rc = -EINVAL;
1433 if (sk->sk_state != TCP_CLOSE)
1434 break;
1435 x25->accptapprv = X25_ALLOW_ACCPT_APPRV;
1436 rc = 0;
1437 break;
1438 }
1439
1440 case SIOCX25SENDCALLACCPT: {
1441 rc = -EINVAL;
1442 if (sk->sk_state != TCP_ESTABLISHED)
1443 break;
1444 if (x25->accptapprv) /* must call accptapprv above */
1445 break;
1446 x25_write_internal(sk, X25_CALL_ACCEPTED);
1447 x25->state = X25_STATE_3;
1448 rc = 0;
1449 break;
1450 }
1451
f8e1d201 1452 default:
b5e5fa5e 1453 rc = -ENOIOCTLCMD;
1da177e4
LT		 1454 break;
1455 }
1456
1457 return rc;
1458}
1459
1460static struct net_proto_family x25_family_ops = {
1461 .family = AF_X25,
1462 .create = x25_create,
1463 .owner = THIS_MODULE,
1464};
1465
1b06e6ba
SP		 1466#ifdef CONFIG_COMPAT
1467static int compat_x25_subscr_ioctl(unsigned int cmd,
1468 struct compat_x25_subscrip_struct __user *x25_subscr32)
1469{
1470 struct compat_x25_subscrip_struct x25_subscr;
1471 struct x25_neigh *nb;
1472 struct net_device *dev;
1473 int rc = -EINVAL;
1474
1475 rc = -EFAULT;
1476 if (copy_from_user(&x25_subscr, x25_subscr32, sizeof(*x25_subscr32)))
1477 goto out;
1478
1479 rc = -EINVAL;
1480 dev = x25_dev_get(x25_subscr.device);
1481 if (dev == NULL)
1482 goto out;
1483
1484 nb = x25_get_neigh(dev);
1485 if (nb == NULL)
1486 goto out_dev_put;
1487
1488 dev_put(dev);
1489
1490 if (cmd == SIOCX25GSUBSCRIP) {
1491 x25_subscr.extended = nb->extended;
1492 x25_subscr.global_facil_mask = nb->global_facil_mask;
1493 rc = copy_to_user(x25_subscr32, &x25_subscr,
1494 sizeof(*x25_subscr32)) ? -EFAULT : 0;
1495 } else {
1496 rc = -EINVAL;
1497 if (x25_subscr.extended == 0 || x25_subscr.extended == 1) {
1498 rc = 0;
1499 nb->extended = x25_subscr.extended;
1500 nb->global_facil_mask = x25_subscr.global_facil_mask;
1501 }
1502 }
1503 x25_neigh_put(nb);
1504out:
1505 return rc;
1506out_dev_put:
1507 dev_put(dev);
1508 goto out;
1509}
1510
1511static int compat_x25_ioctl(struct socket *sock, unsigned int cmd,
1512 unsigned long arg)
1513{
1514 void __user *argp = compat_ptr(arg);
1515 struct sock *sk = sock->sk;
1516
1517 int rc = -ENOIOCTLCMD;
1518
1519 switch(cmd) {
1520 case TIOCOUTQ:
1521 case TIOCINQ:
1522 rc = x25_ioctl(sock, cmd, (unsigned long)argp);
1523 break;
1524 case SIOCGSTAMP:
1525 rc = -EINVAL;
1526 if (sk)
1527 rc = compat_sock_get_timestamp(sk,
1528 (struct timeval __user*)argp);
1529 break;
ae40eb1e
ED		 1530 case SIOCGSTAMPNS:
1531 rc = -EINVAL;
1532 if (sk)
1533 rc = compat_sock_get_timestampns(sk,
1534 (struct timespec __user*)argp);
1535 break;
1b06e6ba
SP		 1536 case SIOCGIFADDR:
1537 case SIOCSIFADDR:
1538 case SIOCGIFDSTADDR:
1539 case SIOCSIFDSTADDR:
1540 case SIOCGIFBRDADDR:
1541 case SIOCSIFBRDADDR:
1542 case SIOCGIFNETMASK:
1543 case SIOCSIFNETMASK:
1544 case SIOCGIFMETRIC:
1545 case SIOCSIFMETRIC:
1546 rc = -EINVAL;
1547 break;
1548 case SIOCADDRT:
1549 case SIOCDELRT:
1550 rc = -EPERM;
1551 if (!capable(CAP_NET_ADMIN))
1552 break;
1553 rc = x25_route_ioctl(cmd, argp);
1554 break;
1555 case SIOCX25GSUBSCRIP:
1556 rc = compat_x25_subscr_ioctl(cmd, argp);
1557 break;
1558 case SIOCX25SSUBSCRIP:
1559 rc = -EPERM;
1560 if (!capable(CAP_NET_ADMIN))
1561 break;
1562 rc = compat_x25_subscr_ioctl(cmd, argp);
1563 break;
1564 case SIOCX25GFACILITIES:
1565 case SIOCX25SFACILITIES:
9a6b9f2e
SP		 1566 case SIOCX25GDTEFACILITIES:
1567 case SIOCX25SDTEFACILITIES:
1b06e6ba
SP		 1568 case SIOCX25GCALLUSERDATA:
1569 case SIOCX25SCALLUSERDATA:
1570 case SIOCX25GCAUSEDIAG:
1571 case SIOCX25SCUDMATCHLEN:
1572 case SIOCX25CALLACCPTAPPRV:
1573 case SIOCX25SENDCALLACCPT:
1574 rc = x25_ioctl(sock, cmd, (unsigned long)argp);
1575 break;
1576 default:
1577 rc = -ENOIOCTLCMD;
1578 break;
1579 }
1580 return rc;
1581}
1582#endif
1583
90ddc4f0 1584static const struct proto_ops SOCKOPS_WRAPPED(x25_proto_ops) = {
1da177e4
LT		 1585 .family = AF_X25,
1586 .owner = THIS_MODULE,
1587 .release = x25_release,
1588 .bind = x25_bind,
1589 .connect = x25_connect,
1590 .socketpair = sock_no_socketpair,
1591 .accept = x25_accept,
1592 .getname = x25_getname,
1593 .poll = datagram_poll,
1594 .ioctl = x25_ioctl,
1b06e6ba
SP		 1595#ifdef CONFIG_COMPAT
1596 .compat_ioctl = compat_x25_ioctl,
1597#endif
1da177e4
LT		 1598 .listen = x25_listen,
1599 .shutdown = sock_no_shutdown,
1600 .setsockopt = x25_setsockopt,
1601 .getsockopt = x25_getsockopt,
1602 .sendmsg = x25_sendmsg,
1603 .recvmsg = x25_recvmsg,
1604 .mmap = sock_no_mmap,
1605 .sendpage = sock_no_sendpage,
1606};
1607
1da177e4
LT		 1608SOCKOPS_WRAP(x25_proto, AF_X25);
1609
7546dd97 1610static struct packet_type x25_packet_type __read_mostly = {
09640e63 1611 .type = cpu_to_be16(ETH_P_X25),
1da177e4
LT		 1612 .func = x25_lapb_receive_frame,
1613};
1614
1615static struct notifier_block x25_dev_notifier = {
1616 .notifier_call = x25_device_event,
1617};
1618
1619void x25_kill_by_neigh(struct x25_neigh *nb)
1620{
1621 struct sock *s;
1622 struct hlist_node *node;
1623
1624 write_lock_bh(&x25_list_lock);
1625
1626 sk_for_each(s, node, &x25_list)
1627 if (x25_sk(s)->neighbour == nb)
1628 x25_disconnect(s, ENETUNREACH, 0, 0);
1629
1630 write_unlock_bh(&x25_list_lock);
95a9dc43
AH		 1631
1632 /* Remove any related forwards */
1633 x25_clear_forward_by_dev(nb->dev);
1da177e4
LT		 1634}
1635
1636static int __init x25_init(void)
1637{
1638 int rc = proto_register(&x25_proto, 0);
1639
1640 if (rc != 0)
1641 goto out;
1642
1643 sock_register(&x25_family_ops);
1644
1645 dev_add_pack(&x25_packet_type);
1646
1647 register_netdevice_notifier(&x25_dev_notifier);
1648
a44562e4 1649 printk(KERN_INFO "X.25 for Linux Version 0.2\n");
1da177e4
LT		 1650
1651#ifdef CONFIG_SYSCTL
1652 x25_register_sysctl();
1653#endif
1654 x25_proc_init();
1655out:
1656 return rc;
1657}
1658module_init(x25_init);
1659
1660static void __exit x25_exit(void)
1661{
1662 x25_proc_exit();
1663 x25_link_free();
1664 x25_route_free();
1665
1666#ifdef CONFIG_SYSCTL
1667 x25_unregister_sysctl();
1668#endif
1669
1670 unregister_netdevice_notifier(&x25_dev_notifier);
1671
1672 dev_remove_pack(&x25_packet_type);
1673
1674 sock_unregister(AF_X25);
1675 proto_unregister(&x25_proto);
1676}
1677module_exit(x25_exit);
1678
1679MODULE_AUTHOR("Jonathan Naylor <g4klx@g4klx.demon.co.uk>");
1680MODULE_DESCRIPTION("The X.25 Packet Layer network layer protocol");
1681MODULE_LICENSE("GPL");
1682MODULE_ALIAS_NETPROTO(PF_X25);
Clone of davem's net-next-2.6 tree