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[SK_BUFF]: Introduce skb_reset_transport_header(skb)
[GitHub/mt8127/android_kernel_alcatel_ttab.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{
86 int called_len, calling_len;
87 char *called, *calling;
88 int i;
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
194 if (dev->type == ARPHRD_X25
195#if defined(CONFIG_LLC) || defined(CONFIG_LLC_MODULE)
196 || dev->type == ARPHRD_ETHER
197#endif
198 ) {
199 switch (event) {
200 case NETDEV_UP:
201 x25_link_device_up(dev);
202 break;
203 case NETDEV_GOING_DOWN:
204 nb = x25_get_neigh(dev);
205 if (nb) {
206 x25_terminate_link(nb);
207 x25_neigh_put(nb);
208 }
209 break;
210 case NETDEV_DOWN:
211 x25_kill_by_device(dev);
212 x25_route_device_down(dev);
213 x25_link_device_down(dev);
214 break;
215 }
216 }
217
218 return NOTIFY_DONE;
219}
220
221/*
222 * Add a socket to the bound sockets list.
223 */
224static void x25_insert_socket(struct sock *sk)
225{
226 write_lock_bh(&x25_list_lock);
227 sk_add_node(sk, &x25_list);
228 write_unlock_bh(&x25_list_lock);
229}
230
231/*
232 * Find a socket that wants to accept the Call Request we just
233 * received. Check the full list for an address/cud match.
234 * If no cuds match return the next_best thing, an address match.
235 * Note: if a listening socket has cud set it must only get calls
236 * with matching cud.
237 */
cb65d506
SP		 238static struct sock *x25_find_listener(struct x25_address *addr,
239 struct sk_buff *skb)
1da177e4
LT		 240{
241 struct sock *s;
242 struct sock *next_best;
243 struct hlist_node *node;
244
245 read_lock_bh(&x25_list_lock);
246 next_best = NULL;
247
248 sk_for_each(s, node, &x25_list)
249 if ((!strcmp(addr->x25_addr,
cb65d506
SP		 250 x25_sk(s)->source_addr.x25_addr) ||
251 !strcmp(addr->x25_addr,
252 null_x25_address.x25_addr)) &&
253 s->sk_state == TCP_LISTEN) {
1da177e4
LT		 254 /*
255 * Found a listening socket, now check the incoming
256 * call user data vs this sockets call user data
257 */
cb65d506 258 if(skb->len > 0 && x25_sk(s)->cudmatchlength > 0) {
f8e1d201
YH		 259 if((memcmp(x25_sk(s)->calluserdata.cuddata,
260 skb->data,
cb65d506
SP		 261 x25_sk(s)->cudmatchlength)) == 0) {
262 sock_hold(s);
263 goto found;
264 }
265 } else
1da177e4 266 next_best = s;
1da177e4
LT		 267 }
268 if (next_best) {
269 s = next_best;
270 sock_hold(s);
271 goto found;
272 }
273 s = NULL;
274found:
275 read_unlock_bh(&x25_list_lock);
276 return s;
277}
278
279/*
280 * Find a connected X.25 socket given my LCI and neighbour.
281 */
282static struct sock *__x25_find_socket(unsigned int lci, struct x25_neigh *nb)
283{
284 struct sock *s;
285 struct hlist_node *node;
286
287 sk_for_each(s, node, &x25_list)
288 if (x25_sk(s)->lci == lci && x25_sk(s)->neighbour == nb) {
289 sock_hold(s);
290 goto found;
291 }
292 s = NULL;
293found:
294 return s;
295}
296
297struct sock *x25_find_socket(unsigned int lci, struct x25_neigh *nb)
298{
299 struct sock *s;
300
301 read_lock_bh(&x25_list_lock);
302 s = __x25_find_socket(lci, nb);
303 read_unlock_bh(&x25_list_lock);
304 return s;
305}
306
307/*
308 * Find a unique LCI for a given device.
309 */
310static unsigned int x25_new_lci(struct x25_neigh *nb)
311{
312 unsigned int lci = 1;
313 struct sock *sk;
314
315 read_lock_bh(&x25_list_lock);
316
317 while ((sk = __x25_find_socket(lci, nb)) != NULL) {
318 sock_put(sk);
319 if (++lci == 4096) {
320 lci = 0;
321 break;
322 }
323 }
324
325 read_unlock_bh(&x25_list_lock);
326 return lci;
327}
328
329/*
330 * Deferred destroy.
331 */
332void x25_destroy_socket(struct sock *);
333
334/*
335 * handler for deferred kills.
336 */
337static void x25_destroy_timer(unsigned long data)
338{
339 x25_destroy_socket((struct sock *)data);
340}
341
342/*
343 * This is called from user mode and the timers. Thus it protects itself
344 * against interrupt users but doesn't worry about being called during
345 * work. Once it is removed from the queue no interrupt or bottom half
346 * will touch it and we are (fairly 8-) ) safe.
347 * Not static as it's used by the timer
348 */
349void x25_destroy_socket(struct sock *sk)
350{
351 struct sk_buff *skb;
352
353 sock_hold(sk);
354 lock_sock(sk);
355 x25_stop_heartbeat(sk);
356 x25_stop_timer(sk);
357
358 x25_remove_socket(sk);
359 x25_clear_queues(sk); /* Flush the queues */
360
361 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
362 if (skb->sk != sk) { /* A pending connection */
363 /*
364 * Queue the unaccepted socket for death
365 */
366 sock_set_flag(skb->sk, SOCK_DEAD);
367 x25_start_heartbeat(skb->sk);
368 x25_sk(skb->sk)->state = X25_STATE_0;
369 }
370
371 kfree_skb(skb);
372 }
373
374 if (atomic_read(&sk->sk_wmem_alloc) ||
375 atomic_read(&sk->sk_rmem_alloc)) {
376 /* Defer: outstanding buffers */
377 sk->sk_timer.expires = jiffies + 10 * HZ;
378 sk->sk_timer.function = x25_destroy_timer;
379 sk->sk_timer.data = (unsigned long)sk;
380 add_timer(&sk->sk_timer);
381 } else {
382 /* drop last reference so sock_put will free */
383 __sock_put(sk);
384 }
385
386 release_sock(sk);
387 sock_put(sk);
388}
389
390/*
391 * Handling for system calls applied via the various interfaces to a
392 * X.25 socket object.
393 */
394
395static int x25_setsockopt(struct socket *sock, int level, int optname,
396 char __user *optval, int optlen)
397{
398 int opt;
399 struct sock *sk = sock->sk;
400 int rc = -ENOPROTOOPT;
401
402 if (level != SOL_X25 || optname != X25_QBITINCL)
403 goto out;
404
405 rc = -EINVAL;
406 if (optlen < sizeof(int))
407 goto out;
408
409 rc = -EFAULT;
410 if (get_user(opt, (int __user *)optval))
411 goto out;
412
413 x25_sk(sk)->qbitincl = !!opt;
414 rc = 0;
415out:
416 return rc;
417}
418
419static int x25_getsockopt(struct socket *sock, int level, int optname,
420 char __user *optval, int __user *optlen)
421{
422 struct sock *sk = sock->sk;
423 int val, len, rc = -ENOPROTOOPT;
f8e1d201 424
1da177e4
LT		 425 if (level != SOL_X25 || optname != X25_QBITINCL)
426 goto out;
427
428 rc = -EFAULT;
429 if (get_user(len, optlen))
430 goto out;
431
432 len = min_t(unsigned int, len, sizeof(int));
433
434 rc = -EINVAL;
435 if (len < 0)
436 goto out;
f8e1d201 437
1da177e4
LT		 438 rc = -EFAULT;
439 if (put_user(len, optlen))
440 goto out;
441
442 val = x25_sk(sk)->qbitincl;
443 rc = copy_to_user(optval, &val, len) ? -EFAULT : 0;
444out:
445 return rc;
446}
447
448static int x25_listen(struct socket *sock, int backlog)
449{
450 struct sock *sk = sock->sk;
451 int rc = -EOPNOTSUPP;
452
453 if (sk->sk_state != TCP_LISTEN) {
454 memset(&x25_sk(sk)->dest_addr, 0, X25_ADDR_LEN);
455 sk->sk_max_ack_backlog = backlog;
456 sk->sk_state = TCP_LISTEN;
457 rc = 0;
458 }
459
460 return rc;
461}
462
463static struct proto x25_proto = {
464 .name = "X25",
465 .owner = THIS_MODULE,
466 .obj_size = sizeof(struct x25_sock),
467};
468
469static struct sock *x25_alloc_socket(void)
470{
471 struct x25_sock *x25;
472 struct sock *sk = sk_alloc(AF_X25, GFP_ATOMIC, &x25_proto, 1);
473
474 if (!sk)
475 goto out;
476
477 sock_init_data(NULL, sk);
478
479 x25 = x25_sk(sk);
480 skb_queue_head_init(&x25->ack_queue);
481 skb_queue_head_init(&x25->fragment_queue);
482 skb_queue_head_init(&x25->interrupt_in_queue);
483 skb_queue_head_init(&x25->interrupt_out_queue);
484out:
485 return sk;
486}
487
1da177e4
LT		 488static int x25_create(struct socket *sock, int protocol)
489{
490 struct sock *sk;
491 struct x25_sock *x25;
492 int rc = -ESOCKTNOSUPPORT;
493
494 if (sock->type != SOCK_SEQPACKET || protocol)
495 goto out;
496
497 rc = -ENOMEM;
498 if ((sk = x25_alloc_socket()) == NULL)
499 goto out;
500
501 x25 = x25_sk(sk);
502
503 sock_init_data(sock, sk);
504
505 x25_init_timers(sk);
506
507 sock->ops = &x25_proto_ops;
508 sk->sk_protocol = protocol;
509 sk->sk_backlog_rcv = x25_backlog_rcv;
510
511 x25->t21 = sysctl_x25_call_request_timeout;
512 x25->t22 = sysctl_x25_reset_request_timeout;
513 x25->t23 = sysctl_x25_clear_request_timeout;
514 x25->t2 = sysctl_x25_ack_holdback_timeout;
515 x25->state = X25_STATE_0;
cb65d506 516 x25->cudmatchlength = 0;
ebc3f64b
SP		 517 x25->accptapprv = X25_DENY_ACCPT_APPRV; /* normally no cud */
518 /* on call accept */
1da177e4
LT		 519
520 x25->facilities.winsize_in = X25_DEFAULT_WINDOW_SIZE;
521 x25->facilities.winsize_out = X25_DEFAULT_WINDOW_SIZE;
522 x25->facilities.pacsize_in = X25_DEFAULT_PACKET_SIZE;
523 x25->facilities.pacsize_out = X25_DEFAULT_PACKET_SIZE;
524 x25->facilities.throughput = X25_DEFAULT_THROUGHPUT;
525 x25->facilities.reverse = X25_DEFAULT_REVERSE;
f8e1d201
YH		 526 x25->dte_facilities.calling_len = 0;
527 x25->dte_facilities.called_len = 0;
528 memset(x25->dte_facilities.called_ae, '\0',
529 sizeof(x25->dte_facilities.called_ae));
530 memset(x25->dte_facilities.calling_ae, '\0',
531 sizeof(x25->dte_facilities.calling_ae));
a64b7b93 532
1da177e4
LT		 533 rc = 0;
534out:
535 return rc;
536}
537
538static struct sock *x25_make_new(struct sock *osk)
539{
540 struct sock *sk = NULL;
541 struct x25_sock *x25, *ox25;
542
543 if (osk->sk_type != SOCK_SEQPACKET)
544 goto out;
545
546 if ((sk = x25_alloc_socket()) == NULL)
547 goto out;
548
549 x25 = x25_sk(sk);
550
551 sk->sk_type = osk->sk_type;
552 sk->sk_socket = osk->sk_socket;
553 sk->sk_priority = osk->sk_priority;
554 sk->sk_protocol = osk->sk_protocol;
555 sk->sk_rcvbuf = osk->sk_rcvbuf;
556 sk->sk_sndbuf = osk->sk_sndbuf;
557 sk->sk_state = TCP_ESTABLISHED;
558 sk->sk_sleep = osk->sk_sleep;
559 sk->sk_backlog_rcv = osk->sk_backlog_rcv;
a20a8554 560 sock_copy_flags(sk, osk);
1da177e4
LT		 561
562 ox25 = x25_sk(osk);
563 x25->t21 = ox25->t21;
564 x25->t22 = ox25->t22;
565 x25->t23 = ox25->t23;
566 x25->t2 = ox25->t2;
567 x25->facilities = ox25->facilities;
568 x25->qbitincl = ox25->qbitincl;
a64b7b93 569 x25->dte_facilities = ox25->dte_facilities;
cb65d506 570 x25->cudmatchlength = ox25->cudmatchlength;
ebc3f64b 571 x25->accptapprv = ox25->accptapprv;
1da177e4
LT		 572
573 x25_init_timers(sk);
574out:
575 return sk;
576}
577
578static int x25_release(struct socket *sock)
579{
580 struct sock *sk = sock->sk;
581 struct x25_sock *x25;
582
583 if (!sk)
584 goto out;
585
586 x25 = x25_sk(sk);
587
588 switch (x25->state) {
589
590 case X25_STATE_0:
591 case X25_STATE_2:
592 x25_disconnect(sk, 0, 0, 0);
593 x25_destroy_socket(sk);
594 goto out;
595
596 case X25_STATE_1:
597 case X25_STATE_3:
598 case X25_STATE_4:
599 x25_clear_queues(sk);
600 x25_write_internal(sk, X25_CLEAR_REQUEST);
601 x25_start_t23timer(sk);
602 x25->state = X25_STATE_2;
603 sk->sk_state = TCP_CLOSE;
604 sk->sk_shutdown |= SEND_SHUTDOWN;
605 sk->sk_state_change(sk);
606 sock_set_flag(sk, SOCK_DEAD);
607 sock_set_flag(sk, SOCK_DESTROY);
608 break;
609 }
610
f8e1d201 611 sock->sk = NULL;
1da177e4
LT		 612 sk->sk_socket = NULL; /* Not used, but we should do this */
613out:
614 return 0;
615}
616
617static int x25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
618{
619 struct sock *sk = sock->sk;
620 struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr;
621
622 if (!sock_flag(sk, SOCK_ZAPPED) ||
623 addr_len != sizeof(struct sockaddr_x25) ||
624 addr->sx25_family != AF_X25)
625 return -EINVAL;
626
627 x25_sk(sk)->source_addr = addr->sx25_addr;
628 x25_insert_socket(sk);
629 sock_reset_flag(sk, SOCK_ZAPPED);
630 SOCK_DEBUG(sk, "x25_bind: socket is bound\n");
631
632 return 0;
633}
634
635static int x25_wait_for_connection_establishment(struct sock *sk)
636{
637 DECLARE_WAITQUEUE(wait, current);
f8e1d201 638 int rc;
1da177e4
LT		 639
640 add_wait_queue_exclusive(sk->sk_sleep, &wait);
641 for (;;) {
642 __set_current_state(TASK_INTERRUPTIBLE);
643 rc = -ERESTARTSYS;
644 if (signal_pending(current))
645 break;
646 rc = sock_error(sk);
647 if (rc) {
648 sk->sk_socket->state = SS_UNCONNECTED;
649 break;
650 }
651 rc = 0;
652 if (sk->sk_state != TCP_ESTABLISHED) {
653 release_sock(sk);
654 schedule();
655 lock_sock(sk);
656 } else
657 break;
658 }
659 __set_current_state(TASK_RUNNING);
660 remove_wait_queue(sk->sk_sleep, &wait);
661 return rc;
662}
663
664static int x25_connect(struct socket *sock, struct sockaddr *uaddr,
665 int addr_len, int flags)
666{
667 struct sock *sk = sock->sk;
668 struct x25_sock *x25 = x25_sk(sk);
669 struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr;
670 struct x25_route *rt;
671 int rc = 0;
672
673 lock_sock(sk);
674 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
675 sock->state = SS_CONNECTED;
676 goto out; /* Connect completed during a ERESTARTSYS event */
677 }
678
679 rc = -ECONNREFUSED;
680 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
681 sock->state = SS_UNCONNECTED;
682 goto out;
683 }
684
685 rc = -EISCONN; /* No reconnect on a seqpacket socket */
686 if (sk->sk_state == TCP_ESTABLISHED)
687 goto out;
688
f8e1d201 689 sk->sk_state = TCP_CLOSE;
1da177e4
LT		 690 sock->state = SS_UNCONNECTED;
691
692 rc = -EINVAL;
693 if (addr_len != sizeof(struct sockaddr_x25) ||
694 addr->sx25_family != AF_X25)
695 goto out;
696
697 rc = -ENETUNREACH;
698 rt = x25_get_route(&addr->sx25_addr);
699 if (!rt)
700 goto out;
701
702 x25->neighbour = x25_get_neigh(rt->dev);
703 if (!x25->neighbour)
704 goto out_put_route;
705
706 x25_limit_facilities(&x25->facilities, x25->neighbour);
707
708 x25->lci = x25_new_lci(x25->neighbour);
709 if (!x25->lci)
710 goto out_put_neigh;
711
712 rc = -EINVAL;
713 if (sock_flag(sk, SOCK_ZAPPED)) /* Must bind first - autobinding does not work */
714 goto out_put_neigh;
715
716 if (!strcmp(x25->source_addr.x25_addr, null_x25_address.x25_addr))
717 memset(&x25->source_addr, '\0', X25_ADDR_LEN);
718
719 x25->dest_addr = addr->sx25_addr;
720
721 /* Move to connecting socket, start sending Connect Requests */
722 sock->state = SS_CONNECTING;
723 sk->sk_state = TCP_SYN_SENT;
724
725 x25->state = X25_STATE_1;
726
727 x25_write_internal(sk, X25_CALL_REQUEST);
728
729 x25_start_heartbeat(sk);
730 x25_start_t21timer(sk);
731
732 /* Now the loop */
733 rc = -EINPROGRESS;
734 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
735 goto out_put_neigh;
736
737 rc = x25_wait_for_connection_establishment(sk);
738 if (rc)
739 goto out_put_neigh;
740
741 sock->state = SS_CONNECTED;
742 rc = 0;
743out_put_neigh:
744 if (rc)
745 x25_neigh_put(x25->neighbour);
746out_put_route:
747 x25_route_put(rt);
748out:
749 release_sock(sk);
750 return rc;
751}
752
bac37ec8 753static int x25_wait_for_data(struct sock *sk, long timeout)
1da177e4
LT		 754{
755 DECLARE_WAITQUEUE(wait, current);
756 int rc = 0;
757
758 add_wait_queue_exclusive(sk->sk_sleep, &wait);
759 for (;;) {
760 __set_current_state(TASK_INTERRUPTIBLE);
761 if (sk->sk_shutdown & RCV_SHUTDOWN)
762 break;
763 rc = -ERESTARTSYS;
764 if (signal_pending(current))
765 break;
766 rc = -EAGAIN;
767 if (!timeout)
768 break;
769 rc = 0;
770 if (skb_queue_empty(&sk->sk_receive_queue)) {
771 release_sock(sk);
772 timeout = schedule_timeout(timeout);
773 lock_sock(sk);
774 } else
775 break;
776 }
777 __set_current_state(TASK_RUNNING);
778 remove_wait_queue(sk->sk_sleep, &wait);
779 return rc;
780}
f8e1d201 781
1da177e4
LT		 782static int x25_accept(struct socket *sock, struct socket *newsock, int flags)
783{
784 struct sock *sk = sock->sk;
785 struct sock *newsk;
786 struct sk_buff *skb;
787 int rc = -EINVAL;
788
789 if (!sk || sk->sk_state != TCP_LISTEN)
790 goto out;
791
792 rc = -EOPNOTSUPP;
793 if (sk->sk_type != SOCK_SEQPACKET)
794 goto out;
795
796 lock_sock(sk);
797 rc = x25_wait_for_data(sk, sk->sk_rcvtimeo);
798 if (rc)
799 goto out2;
800 skb = skb_dequeue(&sk->sk_receive_queue);
801 rc = -EINVAL;
802 if (!skb->sk)
803 goto out2;
804 newsk = skb->sk;
805 newsk->sk_socket = newsock;
806 newsk->sk_sleep = &newsock->wait;
807
808 /* Now attach up the new socket */
809 skb->sk = NULL;
810 kfree_skb(skb);
811 sk->sk_ack_backlog--;
812 newsock->sk = newsk;
813 newsock->state = SS_CONNECTED;
814 rc = 0;
815out2:
816 release_sock(sk);
817out:
818 return rc;
819}
820
821static int x25_getname(struct socket *sock, struct sockaddr *uaddr,
822 int *uaddr_len, int peer)
823{
824 struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)uaddr;
825 struct sock *sk = sock->sk;
826 struct x25_sock *x25 = x25_sk(sk);
827
828 if (peer) {
829 if (sk->sk_state != TCP_ESTABLISHED)
830 return -ENOTCONN;
831 sx25->sx25_addr = x25->dest_addr;
832 } else
833 sx25->sx25_addr = x25->source_addr;
834
835 sx25->sx25_family = AF_X25;
836 *uaddr_len = sizeof(*sx25);
837
838 return 0;
839}
f8e1d201 840
1da177e4
LT		 841int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *nb,
842 unsigned int lci)
843{
844 struct sock *sk;
845 struct sock *make;
846 struct x25_sock *makex25;
847 struct x25_address source_addr, dest_addr;
848 struct x25_facilities facilities;
a64b7b93 849 struct x25_dte_facilities dte_facilities;
95a9dc43 850 int len, addr_len, rc;
1da177e4
LT		 851
852 /*
853 * Remove the LCI and frame type.
854 */
855 skb_pull(skb, X25_STD_MIN_LEN);
856
857 /*
858 * Extract the X.25 addresses and convert them to ASCII strings,
859 * and remove them.
860 */
95a9dc43
AH		 861 addr_len = x25_addr_ntoa(skb->data, &source_addr, &dest_addr);
862 skb_pull(skb, addr_len);
1da177e4
LT		 863
864 /*
865 * Get the length of the facilities, skip past them for the moment
866 * get the call user data because this is needed to determine
867 * the correct listener
868 */
869 len = skb->data[0] + 1;
870 skb_pull(skb,len);
871
1da177e4
LT		 872 /*
873 * Find a listener for the particular address/cud pair.
874 */
cb65d506
SP		 875 sk = x25_find_listener(&source_addr,skb);
876 skb_push(skb,len);
1da177e4 877
95a9dc43
AH		 878 if (sk != NULL && sk_acceptq_is_full(sk)) {
879 goto out_sock_put;
880 }
881
1da177e4 882 /*
95a9dc43
AH		 883 * We dont have any listeners for this incoming call.
884 * Try forwarding it.
1da177e4 885 */
95a9dc43
AH		 886 if (sk == NULL) {
887 skb_push(skb, addr_len + X25_STD_MIN_LEN);
39e21c0d
AH		 888 if (sysctl_x25_forward &&
889 x25_forward_call(&dest_addr, nb, skb, lci) > 0)
95a9dc43
AH		 890 {
891 /* Call was forwarded, dont process it any more */
892 kfree_skb(skb);
893 rc = 1;
894 goto out;
895 } else {
896 /* No listeners, can't forward, clear the call */
897 goto out_clear_request;
898 }
899 }
1da177e4
LT		 900
901 /*
902 * Try to reach a compromise on the requested facilities.
903 */
a64b7b93
SP		 904 len = x25_negotiate_facilities(skb, sk, &facilities, &dte_facilities);
905 if (len == -1)
1da177e4
LT		 906 goto out_sock_put;
907
908 /*
909 * current neighbour/link might impose additional limits
910 * on certain facilties
911 */
912
913 x25_limit_facilities(&facilities, nb);
914
915 /*
916 * Try to create a new socket.
917 */
918 make = x25_make_new(sk);
919 if (!make)
920 goto out_sock_put;
921
922 /*
923 * Remove the facilities
924 */
925 skb_pull(skb, len);
926
927 skb->sk = make;
928 make->sk_state = TCP_ESTABLISHED;
929
930 makex25 = x25_sk(make);
931 makex25->lci = lci;
932 makex25->dest_addr = dest_addr;
933 makex25->source_addr = source_addr;
934 makex25->neighbour = nb;
935 makex25->facilities = facilities;
a64b7b93 936 makex25->dte_facilities= dte_facilities;
1da177e4 937 makex25->vc_facil_mask = x25_sk(sk)->vc_facil_mask;
cb65d506
SP		 938 /* ensure no reverse facil on accept */
939 makex25->vc_facil_mask &= ~X25_MASK_REVERSE;
a64b7b93
SP		 940 /* ensure no calling address extension on accept */
941 makex25->vc_facil_mask &= ~X25_MASK_CALLING_AE;
cb65d506 942 makex25->cudmatchlength = x25_sk(sk)->cudmatchlength;
1da177e4 943
ebc3f64b
SP		 944 /* Normally all calls are accepted immediatly */
945 if(makex25->accptapprv & X25_DENY_ACCPT_APPRV) {
946 x25_write_internal(make, X25_CALL_ACCEPTED);
947 makex25->state = X25_STATE_3;
948 }
1da177e4 949
cb65d506
SP		 950 /*
951 * Incoming Call User Data.
952 */
953 if (skb->len >= 0) {
954 memcpy(makex25->calluserdata.cuddata, skb->data, skb->len);
955 makex25->calluserdata.cudlength = skb->len;
956 }
957
1da177e4
LT		 958 sk->sk_ack_backlog++;
959
960 x25_insert_socket(make);
961
962 skb_queue_head(&sk->sk_receive_queue, skb);
963
964 x25_start_heartbeat(make);
965
966 if (!sock_flag(sk, SOCK_DEAD))
967 sk->sk_data_ready(sk, skb->len);
968 rc = 1;
969 sock_put(sk);
970out:
971 return rc;
972out_sock_put:
973 sock_put(sk);
974out_clear_request:
975 rc = 0;
976 x25_transmit_clear_request(nb, lci, 0x01);
977 goto out;
978}
979
980static int x25_sendmsg(struct kiocb *iocb, struct socket *sock,
981 struct msghdr *msg, size_t len)
982{
983 struct sock *sk = sock->sk;
984 struct x25_sock *x25 = x25_sk(sk);
985 struct sockaddr_x25 *usx25 = (struct sockaddr_x25 *)msg->msg_name;
986 struct sockaddr_x25 sx25;
987 struct sk_buff *skb;
988 unsigned char *asmptr;
989 int noblock = msg->msg_flags & MSG_DONTWAIT;
990 size_t size;
991 int qbit = 0, rc = -EINVAL;
992
993 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_OOB|MSG_EOR|MSG_CMSG_COMPAT))
994 goto out;
995
996 /* we currently don't support segmented records at the user interface */
997 if (!(msg->msg_flags & (MSG_EOR|MSG_OOB)))
998 goto out;
999
1000 rc = -EADDRNOTAVAIL;
1001 if (sock_flag(sk, SOCK_ZAPPED))
1002 goto out;
1003
1004 rc = -EPIPE;
1005 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1006 send_sig(SIGPIPE, current, 0);
1007 goto out;
1008 }
1009
1010 rc = -ENETUNREACH;
1011 if (!x25->neighbour)
1012 goto out;
1013
1014 if (usx25) {
1015 rc = -EINVAL;
1016 if (msg->msg_namelen < sizeof(sx25))
1017 goto out;
1018 memcpy(&sx25, usx25, sizeof(sx25));
1019 rc = -EISCONN;
1020 if (strcmp(x25->dest_addr.x25_addr, sx25.sx25_addr.x25_addr))
1021 goto out;
1022 rc = -EINVAL;
1023 if (sx25.sx25_family != AF_X25)
1024 goto out;
1025 } else {
1026 /*
1027 * FIXME 1003.1g - if the socket is like this because
1028 * it has become closed (not started closed) we ought
1029 * to SIGPIPE, EPIPE;
1030 */
1031 rc = -ENOTCONN;
1032 if (sk->sk_state != TCP_ESTABLISHED)
1033 goto out;
1034
1035 sx25.sx25_family = AF_X25;
1036 sx25.sx25_addr = x25->dest_addr;
1037 }
1038
1039 SOCK_DEBUG(sk, "x25_sendmsg: sendto: Addresses built.\n");
1040
1041 /* Build a packet */
1042 SOCK_DEBUG(sk, "x25_sendmsg: sendto: building packet.\n");
1043
1044 if ((msg->msg_flags & MSG_OOB) && len > 32)
1045 len = 32;
1046
1047 size = len + X25_MAX_L2_LEN + X25_EXT_MIN_LEN;
1048
1049 skb = sock_alloc_send_skb(sk, size, noblock, &rc);
1050 if (!skb)
1051 goto out;
1052 X25_SKB_CB(skb)->flags = msg->msg_flags;
1053
1054 skb_reserve(skb, X25_MAX_L2_LEN + X25_EXT_MIN_LEN);
1055
1056 /*
1057 * Put the data on the end
1058 */
1059 SOCK_DEBUG(sk, "x25_sendmsg: Copying user data\n");
1060
1061 asmptr = skb->h.raw = skb_put(skb, len);
1062
1063 rc = memcpy_fromiovec(asmptr, msg->msg_iov, len);
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 {
f8e1d201 1123 len = x25_output(sk, skb);
1da177e4
LT		 1124 if (len < 0)
1125 kfree_skb(skb);
1126 else if (x25->qbitincl)
1127 len++;
1128 }
1129
1130 /*
1131 * lock_sock() is currently only used to serialize this x25_kick()
1132 * against input-driven x25_kick() calls. It currently only blocks
1133 * incoming packets for this socket and does not protect against
1134 * any other socket state changes and is not called from anywhere
1135 * else. As x25_kick() cannot block and as long as all socket
1136 * operations are BKL-wrapped, we don't need take to care about
1137 * purging the backlog queue in x25_release().
1138 *
1139 * Using lock_sock() to protect all socket operations entirely
1140 * (and making the whole x25 stack SMP aware) unfortunately would
1141 * require major changes to {send,recv}msg and skb allocation methods.
1142 * -> 2.5 ;)
1143 */
1144 lock_sock(sk);
1145 x25_kick(sk);
1146 release_sock(sk);
1147 rc = len;
1148out:
1149 return rc;
1150out_kfree_skb:
1151 kfree_skb(skb);
1152 goto out;
1153}
1154
1155
1156static int x25_recvmsg(struct kiocb *iocb, struct socket *sock,
1157 struct msghdr *msg, size_t size,
1158 int flags)
1159{
1160 struct sock *sk = sock->sk;
1161 struct x25_sock *x25 = x25_sk(sk);
1162 struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name;
1163 size_t copied;
1164 int qbit;
1165 struct sk_buff *skb;
1166 unsigned char *asmptr;
1167 int rc = -ENOTCONN;
1168
1169 /*
1170 * This works for seqpacket too. The receiver has ordered the queue for
1171 * us! We do one quick check first though
1172 */
1173 if (sk->sk_state != TCP_ESTABLISHED)
1174 goto out;
1175
1176 if (flags & MSG_OOB) {
1177 rc = -EINVAL;
1178 if (sock_flag(sk, SOCK_URGINLINE) ||
1179 !skb_peek(&x25->interrupt_in_queue))
1180 goto out;
1181
1182 skb = skb_dequeue(&x25->interrupt_in_queue);
1183
1184 skb_pull(skb, X25_STD_MIN_LEN);
1185
1186 /*
1187 * No Q bit information on Interrupt data.
1188 */
1189 if (x25->qbitincl) {
1190 asmptr = skb_push(skb, 1);
1191 *asmptr = 0x00;
1192 }
1193
1194 msg->msg_flags |= MSG_OOB;
1195 } else {
1196 /* Now we can treat all alike */
1197 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1198 flags & MSG_DONTWAIT, &rc);
1199 if (!skb)
1200 goto out;
1201
1202 qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT;
1203
1204 skb_pull(skb, x25->neighbour->extended ?
1205 X25_EXT_MIN_LEN : X25_STD_MIN_LEN);
1206
1207 if (x25->qbitincl) {
1208 asmptr = skb_push(skb, 1);
1209 *asmptr = qbit;
1210 }
1211 }
1212
badff6d0 1213 skb_reset_transport_header(skb);
1da177e4
LT		 1214 copied = skb->len;
1215
1216 if (copied > size) {
1217 copied = size;
1218 msg->msg_flags |= MSG_TRUNC;
1219 }
1220
f8e1d201 1221 /* Currently, each datagram always contains a complete record */
1da177e4
LT		 1222 msg->msg_flags |= MSG_EOR;
1223
1224 rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1225 if (rc)
1226 goto out_free_dgram;
1227
1228 if (sx25) {
1229 sx25->sx25_family = AF_X25;
1230 sx25->sx25_addr = x25->dest_addr;
1231 }
1232
1233 msg->msg_namelen = sizeof(struct sockaddr_x25);
1234
1235 lock_sock(sk);
1236 x25_check_rbuf(sk);
1237 release_sock(sk);
1238 rc = copied;
1239out_free_dgram:
1240 skb_free_datagram(sk, skb);
1241out:
1242 return rc;
1243}
1244
1245
1246static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1247{
1248 struct sock *sk = sock->sk;
1249 struct x25_sock *x25 = x25_sk(sk);
1250 void __user *argp = (void __user *)arg;
1251 int rc;
1252
1253 switch (cmd) {
1254 case TIOCOUTQ: {
1255 int amount = sk->sk_sndbuf -
1256 atomic_read(&sk->sk_wmem_alloc);
1257 if (amount < 0)
1258 amount = 0;
1259 rc = put_user(amount, (unsigned int __user *)argp);
1260 break;
1261 }
1262
1263 case TIOCINQ: {
1264 struct sk_buff *skb;
1265 int amount = 0;
1266 /*
1267 * These two are safe on a single CPU system as
1268 * only user tasks fiddle here
1269 */
1270 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1271 amount = skb->len;
1272 rc = put_user(amount, (unsigned int __user *)argp);
1273 break;
1274 }
1275
1276 case SIOCGSTAMP:
1277 rc = -EINVAL;
1278 if (sk)
f8e1d201
YH		 1279 rc = sock_get_timestamp(sk,
1280 (struct timeval __user *)argp);
1da177e4 1281 break;
ae40eb1e
ED		 1282 case SIOCGSTAMPNS:
1283 rc = -EINVAL;
1284 if (sk)
1285 rc = sock_get_timestampns(sk,
1286 (struct timespec __user *)argp);
1287 break;
1da177e4
LT		 1288 case SIOCGIFADDR:
1289 case SIOCSIFADDR:
1290 case SIOCGIFDSTADDR:
1291 case SIOCSIFDSTADDR:
1292 case SIOCGIFBRDADDR:
1293 case SIOCSIFBRDADDR:
1294 case SIOCGIFNETMASK:
1295 case SIOCSIFNETMASK:
1296 case SIOCGIFMETRIC:
1297 case SIOCSIFMETRIC:
1298 rc = -EINVAL;
1299 break;
1300 case SIOCADDRT:
1301 case SIOCDELRT:
1302 rc = -EPERM;
1303 if (!capable(CAP_NET_ADMIN))
1304 break;
1305 rc = x25_route_ioctl(cmd, argp);
1306 break;
1307 case SIOCX25GSUBSCRIP:
1308 rc = x25_subscr_ioctl(cmd, argp);
1309 break;
1310 case SIOCX25SSUBSCRIP:
1311 rc = -EPERM;
1312 if (!capable(CAP_NET_ADMIN))
1313 break;
1314 rc = x25_subscr_ioctl(cmd, argp);
1315 break;
1316 case SIOCX25GFACILITIES: {
1317 struct x25_facilities fac = x25->facilities;
1318 rc = copy_to_user(argp, &fac,
1319 sizeof(fac)) ? -EFAULT : 0;
1320 break;
1321 }
1322
1323 case SIOCX25SFACILITIES: {
1324 struct x25_facilities facilities;
1325 rc = -EFAULT;
1326 if (copy_from_user(&facilities, argp,
1327 sizeof(facilities)))
1328 break;
1329 rc = -EINVAL;
1330 if (sk->sk_state != TCP_LISTEN &&
1331 sk->sk_state != TCP_CLOSE)
1332 break;
1333 if (facilities.pacsize_in < X25_PS16 ||
1334 facilities.pacsize_in > X25_PS4096)
1335 break;
1336 if (facilities.pacsize_out < X25_PS16 ||
1337 facilities.pacsize_out > X25_PS4096)
1338 break;
1339 if (facilities.winsize_in < 1 ||
1340 facilities.winsize_in > 127)
1341 break;
1342 if (facilities.throughput < 0x03 ||
1343 facilities.throughput > 0xDD)
1344 break;
ebc3f64b
SP		 1345 if (facilities.reverse &&
1346 (facilities.reverse | 0x81)!= 0x81)
1da177e4
LT		 1347 break;
1348 x25->facilities = facilities;
1349 rc = 0;
1350 break;
1351 }
1352
a64b7b93 1353 case SIOCX25GDTEFACILITIES: {
f8e1d201 1354 rc = copy_to_user(argp, &x25->dte_facilities,
a64b7b93
SP		 1355 sizeof(x25->dte_facilities));
1356 if (rc)
1357 rc = -EFAULT;
f8e1d201
YH		 1358 break;
1359 }
a64b7b93 1360
f8e1d201
YH		 1361 case SIOCX25SDTEFACILITIES: {
1362 struct x25_dte_facilities dtefacs;
1363 rc = -EFAULT;
1364 if (copy_from_user(&dtefacs, argp, sizeof(dtefacs)))
a64b7b93
SP		 1365 break;
1366 rc = -EINVAL;
1367 if (sk->sk_state != TCP_LISTEN &&
1368 sk->sk_state != TCP_CLOSE)
1369 break;
1370 if (dtefacs.calling_len > X25_MAX_AE_LEN)
1371 break;
1372 if (dtefacs.calling_ae == NULL)
1373 break;
1374 if (dtefacs.called_len > X25_MAX_AE_LEN)
1375 break;
1376 if (dtefacs.called_ae == NULL)
1377 break;
1378 x25->dte_facilities = dtefacs;
1379 rc = 0;
1380 break;
1381 }
1382
1da177e4
LT		 1383 case SIOCX25GCALLUSERDATA: {
1384 struct x25_calluserdata cud = x25->calluserdata;
1385 rc = copy_to_user(argp, &cud,
1386 sizeof(cud)) ? -EFAULT : 0;
1387 break;
1388 }
1389
1390 case SIOCX25SCALLUSERDATA: {
1391 struct x25_calluserdata calluserdata;
1392
1393 rc = -EFAULT;
1394 if (copy_from_user(&calluserdata, argp,
1395 sizeof(calluserdata)))
1396 break;
1397 rc = -EINVAL;
1398 if (calluserdata.cudlength > X25_MAX_CUD_LEN)
1399 break;
1400 x25->calluserdata = calluserdata;
1401 rc = 0;
1402 break;
1403 }
1404
1405 case SIOCX25GCAUSEDIAG: {
1406 struct x25_causediag causediag;
1407 causediag = x25->causediag;
1408 rc = copy_to_user(argp, &causediag,
1409 sizeof(causediag)) ? -EFAULT : 0;
1410 break;
1411 }
1412
cb65d506
SP		 1413 case SIOCX25SCUDMATCHLEN: {
1414 struct x25_subaddr sub_addr;
1415 rc = -EINVAL;
1416 if(sk->sk_state != TCP_CLOSE)
1417 break;
1418 rc = -EFAULT;
1419 if (copy_from_user(&sub_addr, argp,
1420 sizeof(sub_addr)))
1421 break;
f8e1d201 1422 rc = -EINVAL;
cb65d506
SP		 1423 if(sub_addr.cudmatchlength > X25_MAX_CUD_LEN)
1424 break;
1425 x25->cudmatchlength = sub_addr.cudmatchlength;
1426 rc = 0;
1427 break;
1428 }
1429
ebc3f64b
SP		 1430 case SIOCX25CALLACCPTAPPRV: {
1431 rc = -EINVAL;
1432 if (sk->sk_state != TCP_CLOSE)
1433 break;
1434 x25->accptapprv = X25_ALLOW_ACCPT_APPRV;
1435 rc = 0;
1436 break;
1437 }
1438
1439 case SIOCX25SENDCALLACCPT: {
1440 rc = -EINVAL;
1441 if (sk->sk_state != TCP_ESTABLISHED)
1442 break;
1443 if (x25->accptapprv) /* must call accptapprv above */
1444 break;
1445 x25_write_internal(sk, X25_CALL_ACCEPTED);
1446 x25->state = X25_STATE_3;
1447 rc = 0;
1448 break;
1449 }
1450
f8e1d201 1451 default:
b5e5fa5e 1452 rc = -ENOIOCTLCMD;
1da177e4
LT		 1453 break;
1454 }
1455
1456 return rc;
1457}
1458
1459static struct net_proto_family x25_family_ops = {
1460 .family = AF_X25,
1461 .create = x25_create,
1462 .owner = THIS_MODULE,
1463};
1464
1b06e6ba
SP		 1465#ifdef CONFIG_COMPAT
1466static int compat_x25_subscr_ioctl(unsigned int cmd,
1467 struct compat_x25_subscrip_struct __user *x25_subscr32)
1468{
1469 struct compat_x25_subscrip_struct x25_subscr;
1470 struct x25_neigh *nb;
1471 struct net_device *dev;
1472 int rc = -EINVAL;
1473
1474 rc = -EFAULT;
1475 if (copy_from_user(&x25_subscr, x25_subscr32, sizeof(*x25_subscr32)))
1476 goto out;
1477
1478 rc = -EINVAL;
1479 dev = x25_dev_get(x25_subscr.device);
1480 if (dev == NULL)
1481 goto out;
1482
1483 nb = x25_get_neigh(dev);
1484 if (nb == NULL)
1485 goto out_dev_put;
1486
1487 dev_put(dev);
1488
1489 if (cmd == SIOCX25GSUBSCRIP) {
1490 x25_subscr.extended = nb->extended;
1491 x25_subscr.global_facil_mask = nb->global_facil_mask;
1492 rc = copy_to_user(x25_subscr32, &x25_subscr,
1493 sizeof(*x25_subscr32)) ? -EFAULT : 0;
1494 } else {
1495 rc = -EINVAL;
1496 if (x25_subscr.extended == 0 || x25_subscr.extended == 1) {
1497 rc = 0;
1498 nb->extended = x25_subscr.extended;
1499 nb->global_facil_mask = x25_subscr.global_facil_mask;
1500 }
1501 }
1502 x25_neigh_put(nb);
1503out:
1504 return rc;
1505out_dev_put:
1506 dev_put(dev);
1507 goto out;
1508}
1509
1510static int compat_x25_ioctl(struct socket *sock, unsigned int cmd,
1511 unsigned long arg)
1512{
1513 void __user *argp = compat_ptr(arg);
1514 struct sock *sk = sock->sk;
1515
1516 int rc = -ENOIOCTLCMD;
1517
1518 switch(cmd) {
1519 case TIOCOUTQ:
1520 case TIOCINQ:
1521 rc = x25_ioctl(sock, cmd, (unsigned long)argp);
1522 break;
1523 case SIOCGSTAMP:
1524 rc = -EINVAL;
1525 if (sk)
1526 rc = compat_sock_get_timestamp(sk,
1527 (struct timeval __user*)argp);
1528 break;
ae40eb1e
ED		 1529 case SIOCGSTAMPNS:
1530 rc = -EINVAL;
1531 if (sk)
1532 rc = compat_sock_get_timestampns(sk,
1533 (struct timespec __user*)argp);
1534 break;
1b06e6ba
SP		 1535 case SIOCGIFADDR:
1536 case SIOCSIFADDR:
1537 case SIOCGIFDSTADDR:
1538 case SIOCSIFDSTADDR:
1539 case SIOCGIFBRDADDR:
1540 case SIOCSIFBRDADDR:
1541 case SIOCGIFNETMASK:
1542 case SIOCSIFNETMASK:
1543 case SIOCGIFMETRIC:
1544 case SIOCSIFMETRIC:
1545 rc = -EINVAL;
1546 break;
1547 case SIOCADDRT:
1548 case SIOCDELRT:
1549 rc = -EPERM;
1550 if (!capable(CAP_NET_ADMIN))
1551 break;
1552 rc = x25_route_ioctl(cmd, argp);
1553 break;
1554 case SIOCX25GSUBSCRIP:
1555 rc = compat_x25_subscr_ioctl(cmd, argp);
1556 break;
1557 case SIOCX25SSUBSCRIP:
1558 rc = -EPERM;
1559 if (!capable(CAP_NET_ADMIN))
1560 break;
1561 rc = compat_x25_subscr_ioctl(cmd, argp);
1562 break;
1563 case SIOCX25GFACILITIES:
1564 case SIOCX25SFACILITIES:
9a6b9f2e
SP		 1565 case SIOCX25GDTEFACILITIES:
1566 case SIOCX25SDTEFACILITIES:
1b06e6ba
SP		 1567 case SIOCX25GCALLUSERDATA:
1568 case SIOCX25SCALLUSERDATA:
1569 case SIOCX25GCAUSEDIAG:
1570 case SIOCX25SCUDMATCHLEN:
1571 case SIOCX25CALLACCPTAPPRV:
1572 case SIOCX25SENDCALLACCPT:
1573 rc = x25_ioctl(sock, cmd, (unsigned long)argp);
1574 break;
1575 default:
1576 rc = -ENOIOCTLCMD;
1577 break;
1578 }
1579 return rc;
1580}
1581#endif
1582
90ddc4f0 1583static const struct proto_ops SOCKOPS_WRAPPED(x25_proto_ops) = {
1da177e4
LT		 1584 .family = AF_X25,
1585 .owner = THIS_MODULE,
1586 .release = x25_release,
1587 .bind = x25_bind,
1588 .connect = x25_connect,
1589 .socketpair = sock_no_socketpair,
1590 .accept = x25_accept,
1591 .getname = x25_getname,
1592 .poll = datagram_poll,
1593 .ioctl = x25_ioctl,
1b06e6ba
SP		 1594#ifdef CONFIG_COMPAT
1595 .compat_ioctl = compat_x25_ioctl,
1596#endif
1da177e4
LT		 1597 .listen = x25_listen,
1598 .shutdown = sock_no_shutdown,
1599 .setsockopt = x25_setsockopt,
1600 .getsockopt = x25_getsockopt,
1601 .sendmsg = x25_sendmsg,
1602 .recvmsg = x25_recvmsg,
1603 .mmap = sock_no_mmap,
1604 .sendpage = sock_no_sendpage,
1605};
1606
1607#include <linux/smp_lock.h>
1608SOCKOPS_WRAP(x25_proto, AF_X25);
1609
1610static struct packet_type x25_packet_type = {
1611 .type = __constant_htons(ETH_P_X25),
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
1649 printk(KERN_INFO "X.25 for Linux. Version 0.2 for Linux 2.1.15\n");
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);
kernel source for telekom puls (alcatel/mediatek)