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[X25]: ioctl conversion 32 bit user to 64 bit kernel
[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
6 * screw up. It might even work.
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.
21 * 2000-03-22 Daniela Squassoni Allowed disabling/enabling of
22 * facilities negotiation and increased
23 * the throughput upper limit.
24 * 2000-08-27 Arnaldo C. Melo s/suser/capable/ + micro cleanups
25 * 2000-09-04 Henner Eisen Set sock->state in x25_accept().
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
38#include <linux/config.h>
39#include <linux/module.h>
4fc268d2 40#include <linux/capability.h>
1da177e4
LT		 41#include <linux/errno.h>
42#include <linux/kernel.h>
43#include <linux/sched.h>
44#include <linux/timer.h>
45#include <linux/string.h>
46#include <linux/net.h>
47#include <linux/netdevice.h>
48#include <linux/if_arp.h>
49#include <linux/skbuff.h>
50#include <net/sock.h>
c752f073 51#include <net/tcp_states.h>
1da177e4
LT		 52#include <asm/uaccess.h>
53#include <linux/fcntl.h>
54#include <linux/termios.h> /* For TIOCINQ/OUTQ */
55#include <linux/notifier.h>
56#include <linux/init.h>
1b06e6ba
SP		 57#include <linux/compat.h>
58
1da177e4 59#include <net/x25.h>
1b06e6ba 60#include <net/compat.h>
1da177e4
LT		 61
62int sysctl_x25_restart_request_timeout = X25_DEFAULT_T20;
63int sysctl_x25_call_request_timeout = X25_DEFAULT_T21;
64int sysctl_x25_reset_request_timeout = X25_DEFAULT_T22;
65int sysctl_x25_clear_request_timeout = X25_DEFAULT_T23;
66int sysctl_x25_ack_holdback_timeout = X25_DEFAULT_T2;
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
SP		 258 if(skb->len > 0 && x25_sk(s)->cudmatchlength > 0) {
259 if((memcmp(x25_sk(s)->calluserdata.cuddata,
260 skb->data,
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;
424
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;
437
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
488void x25_init_timers(struct sock *sk);
489
490static int x25_create(struct socket *sock, int protocol)
491{
492 struct sock *sk;
493 struct x25_sock *x25;
494 int rc = -ESOCKTNOSUPPORT;
495
496 if (sock->type != SOCK_SEQPACKET || protocol)
497 goto out;
498
499 rc = -ENOMEM;
500 if ((sk = x25_alloc_socket()) == NULL)
501 goto out;
502
503 x25 = x25_sk(sk);
504
505 sock_init_data(sock, sk);
506
507 x25_init_timers(sk);
508
509 sock->ops = &x25_proto_ops;
510 sk->sk_protocol = protocol;
511 sk->sk_backlog_rcv = x25_backlog_rcv;
512
513 x25->t21 = sysctl_x25_call_request_timeout;
514 x25->t22 = sysctl_x25_reset_request_timeout;
515 x25->t23 = sysctl_x25_clear_request_timeout;
516 x25->t2 = sysctl_x25_ack_holdback_timeout;
517 x25->state = X25_STATE_0;
cb65d506 518 x25->cudmatchlength = 0;
ebc3f64b
SP		 519 x25->accptapprv = X25_DENY_ACCPT_APPRV; /* normally no cud */
520 /* on call accept */
1da177e4
LT		 521
522 x25->facilities.winsize_in = X25_DEFAULT_WINDOW_SIZE;
523 x25->facilities.winsize_out = X25_DEFAULT_WINDOW_SIZE;
524 x25->facilities.pacsize_in = X25_DEFAULT_PACKET_SIZE;
525 x25->facilities.pacsize_out = X25_DEFAULT_PACKET_SIZE;
526 x25->facilities.throughput = X25_DEFAULT_THROUGHPUT;
527 x25->facilities.reverse = X25_DEFAULT_REVERSE;
528 rc = 0;
529out:
530 return rc;
531}
532
533static struct sock *x25_make_new(struct sock *osk)
534{
535 struct sock *sk = NULL;
536 struct x25_sock *x25, *ox25;
537
538 if (osk->sk_type != SOCK_SEQPACKET)
539 goto out;
540
541 if ((sk = x25_alloc_socket()) == NULL)
542 goto out;
543
544 x25 = x25_sk(sk);
545
546 sk->sk_type = osk->sk_type;
547 sk->sk_socket = osk->sk_socket;
548 sk->sk_priority = osk->sk_priority;
549 sk->sk_protocol = osk->sk_protocol;
550 sk->sk_rcvbuf = osk->sk_rcvbuf;
551 sk->sk_sndbuf = osk->sk_sndbuf;
552 sk->sk_state = TCP_ESTABLISHED;
553 sk->sk_sleep = osk->sk_sleep;
554 sk->sk_backlog_rcv = osk->sk_backlog_rcv;
a20a8554 555 sock_copy_flags(sk, osk);
1da177e4
LT		 556
557 ox25 = x25_sk(osk);
558 x25->t21 = ox25->t21;
559 x25->t22 = ox25->t22;
560 x25->t23 = ox25->t23;
561 x25->t2 = ox25->t2;
562 x25->facilities = ox25->facilities;
563 x25->qbitincl = ox25->qbitincl;
cb65d506 564 x25->cudmatchlength = ox25->cudmatchlength;
ebc3f64b 565 x25->accptapprv = ox25->accptapprv;
1da177e4
LT		 566
567 x25_init_timers(sk);
568out:
569 return sk;
570}
571
572static int x25_release(struct socket *sock)
573{
574 struct sock *sk = sock->sk;
575 struct x25_sock *x25;
576
577 if (!sk)
578 goto out;
579
580 x25 = x25_sk(sk);
581
582 switch (x25->state) {
583
584 case X25_STATE_0:
585 case X25_STATE_2:
586 x25_disconnect(sk, 0, 0, 0);
587 x25_destroy_socket(sk);
588 goto out;
589
590 case X25_STATE_1:
591 case X25_STATE_3:
592 case X25_STATE_4:
593 x25_clear_queues(sk);
594 x25_write_internal(sk, X25_CLEAR_REQUEST);
595 x25_start_t23timer(sk);
596 x25->state = X25_STATE_2;
597 sk->sk_state = TCP_CLOSE;
598 sk->sk_shutdown |= SEND_SHUTDOWN;
599 sk->sk_state_change(sk);
600 sock_set_flag(sk, SOCK_DEAD);
601 sock_set_flag(sk, SOCK_DESTROY);
602 break;
603 }
604
605 sock->sk = NULL;
606 sk->sk_socket = NULL; /* Not used, but we should do this */
607out:
608 return 0;
609}
610
611static int x25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
612{
613 struct sock *sk = sock->sk;
614 struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr;
615
616 if (!sock_flag(sk, SOCK_ZAPPED) ||
617 addr_len != sizeof(struct sockaddr_x25) ||
618 addr->sx25_family != AF_X25)
619 return -EINVAL;
620
621 x25_sk(sk)->source_addr = addr->sx25_addr;
622 x25_insert_socket(sk);
623 sock_reset_flag(sk, SOCK_ZAPPED);
624 SOCK_DEBUG(sk, "x25_bind: socket is bound\n");
625
626 return 0;
627}
628
629static int x25_wait_for_connection_establishment(struct sock *sk)
630{
631 DECLARE_WAITQUEUE(wait, current);
632 int rc;
633
634 add_wait_queue_exclusive(sk->sk_sleep, &wait);
635 for (;;) {
636 __set_current_state(TASK_INTERRUPTIBLE);
637 rc = -ERESTARTSYS;
638 if (signal_pending(current))
639 break;
640 rc = sock_error(sk);
641 if (rc) {
642 sk->sk_socket->state = SS_UNCONNECTED;
643 break;
644 }
645 rc = 0;
646 if (sk->sk_state != TCP_ESTABLISHED) {
647 release_sock(sk);
648 schedule();
649 lock_sock(sk);
650 } else
651 break;
652 }
653 __set_current_state(TASK_RUNNING);
654 remove_wait_queue(sk->sk_sleep, &wait);
655 return rc;
656}
657
658static int x25_connect(struct socket *sock, struct sockaddr *uaddr,
659 int addr_len, int flags)
660{
661 struct sock *sk = sock->sk;
662 struct x25_sock *x25 = x25_sk(sk);
663 struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr;
664 struct x25_route *rt;
665 int rc = 0;
666
667 lock_sock(sk);
668 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
669 sock->state = SS_CONNECTED;
670 goto out; /* Connect completed during a ERESTARTSYS event */
671 }
672
673 rc = -ECONNREFUSED;
674 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
675 sock->state = SS_UNCONNECTED;
676 goto out;
677 }
678
679 rc = -EISCONN; /* No reconnect on a seqpacket socket */
680 if (sk->sk_state == TCP_ESTABLISHED)
681 goto out;
682
683 sk->sk_state = TCP_CLOSE;
684 sock->state = SS_UNCONNECTED;
685
686 rc = -EINVAL;
687 if (addr_len != sizeof(struct sockaddr_x25) ||
688 addr->sx25_family != AF_X25)
689 goto out;
690
691 rc = -ENETUNREACH;
692 rt = x25_get_route(&addr->sx25_addr);
693 if (!rt)
694 goto out;
695
696 x25->neighbour = x25_get_neigh(rt->dev);
697 if (!x25->neighbour)
698 goto out_put_route;
699
700 x25_limit_facilities(&x25->facilities, x25->neighbour);
701
702 x25->lci = x25_new_lci(x25->neighbour);
703 if (!x25->lci)
704 goto out_put_neigh;
705
706 rc = -EINVAL;
707 if (sock_flag(sk, SOCK_ZAPPED)) /* Must bind first - autobinding does not work */
708 goto out_put_neigh;
709
710 if (!strcmp(x25->source_addr.x25_addr, null_x25_address.x25_addr))
711 memset(&x25->source_addr, '\0', X25_ADDR_LEN);
712
713 x25->dest_addr = addr->sx25_addr;
714
715 /* Move to connecting socket, start sending Connect Requests */
716 sock->state = SS_CONNECTING;
717 sk->sk_state = TCP_SYN_SENT;
718
719 x25->state = X25_STATE_1;
720
721 x25_write_internal(sk, X25_CALL_REQUEST);
722
723 x25_start_heartbeat(sk);
724 x25_start_t21timer(sk);
725
726 /* Now the loop */
727 rc = -EINPROGRESS;
728 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
729 goto out_put_neigh;
730
731 rc = x25_wait_for_connection_establishment(sk);
732 if (rc)
733 goto out_put_neigh;
734
735 sock->state = SS_CONNECTED;
736 rc = 0;
737out_put_neigh:
738 if (rc)
739 x25_neigh_put(x25->neighbour);
740out_put_route:
741 x25_route_put(rt);
742out:
743 release_sock(sk);
744 return rc;
745}
746
747static int x25_wait_for_data(struct sock *sk, int timeout)
748{
749 DECLARE_WAITQUEUE(wait, current);
750 int rc = 0;
751
752 add_wait_queue_exclusive(sk->sk_sleep, &wait);
753 for (;;) {
754 __set_current_state(TASK_INTERRUPTIBLE);
755 if (sk->sk_shutdown & RCV_SHUTDOWN)
756 break;
757 rc = -ERESTARTSYS;
758 if (signal_pending(current))
759 break;
760 rc = -EAGAIN;
761 if (!timeout)
762 break;
763 rc = 0;
764 if (skb_queue_empty(&sk->sk_receive_queue)) {
765 release_sock(sk);
766 timeout = schedule_timeout(timeout);
767 lock_sock(sk);
768 } else
769 break;
770 }
771 __set_current_state(TASK_RUNNING);
772 remove_wait_queue(sk->sk_sleep, &wait);
773 return rc;
774}
775
776static int x25_accept(struct socket *sock, struct socket *newsock, int flags)
777{
778 struct sock *sk = sock->sk;
779 struct sock *newsk;
780 struct sk_buff *skb;
781 int rc = -EINVAL;
782
783 if (!sk || sk->sk_state != TCP_LISTEN)
784 goto out;
785
786 rc = -EOPNOTSUPP;
787 if (sk->sk_type != SOCK_SEQPACKET)
788 goto out;
789
790 lock_sock(sk);
791 rc = x25_wait_for_data(sk, sk->sk_rcvtimeo);
792 if (rc)
793 goto out2;
794 skb = skb_dequeue(&sk->sk_receive_queue);
795 rc = -EINVAL;
796 if (!skb->sk)
797 goto out2;
798 newsk = skb->sk;
799 newsk->sk_socket = newsock;
800 newsk->sk_sleep = &newsock->wait;
801
802 /* Now attach up the new socket */
803 skb->sk = NULL;
804 kfree_skb(skb);
805 sk->sk_ack_backlog--;
806 newsock->sk = newsk;
807 newsock->state = SS_CONNECTED;
808 rc = 0;
809out2:
810 release_sock(sk);
811out:
812 return rc;
813}
814
815static int x25_getname(struct socket *sock, struct sockaddr *uaddr,
816 int *uaddr_len, int peer)
817{
818 struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)uaddr;
819 struct sock *sk = sock->sk;
820 struct x25_sock *x25 = x25_sk(sk);
821
822 if (peer) {
823 if (sk->sk_state != TCP_ESTABLISHED)
824 return -ENOTCONN;
825 sx25->sx25_addr = x25->dest_addr;
826 } else
827 sx25->sx25_addr = x25->source_addr;
828
829 sx25->sx25_family = AF_X25;
830 *uaddr_len = sizeof(*sx25);
831
832 return 0;
833}
834
835int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *nb,
836 unsigned int lci)
837{
838 struct sock *sk;
839 struct sock *make;
840 struct x25_sock *makex25;
841 struct x25_address source_addr, dest_addr;
842 struct x25_facilities facilities;
1da177e4
LT		 843 int len, rc;
844
845 /*
846 * Remove the LCI and frame type.
847 */
848 skb_pull(skb, X25_STD_MIN_LEN);
849
850 /*
851 * Extract the X.25 addresses and convert them to ASCII strings,
852 * and remove them.
853 */
854 skb_pull(skb, x25_addr_ntoa(skb->data, &source_addr, &dest_addr));
855
856 /*
857 * Get the length of the facilities, skip past them for the moment
858 * get the call user data because this is needed to determine
859 * the correct listener
860 */
861 len = skb->data[0] + 1;
862 skb_pull(skb,len);
863
1da177e4
LT		 864 /*
865 * Find a listener for the particular address/cud pair.
866 */
cb65d506
SP		 867 sk = x25_find_listener(&source_addr,skb);
868 skb_push(skb,len);
1da177e4
LT		 869
870 /*
871 * We can't accept the Call Request.
872 */
873 if (sk == NULL || sk_acceptq_is_full(sk))
874 goto out_clear_request;
875
876 /*
877 * Try to reach a compromise on the requested facilities.
878 */
879 if ((len = x25_negotiate_facilities(skb, sk, &facilities)) == -1)
880 goto out_sock_put;
881
882 /*
883 * current neighbour/link might impose additional limits
884 * on certain facilties
885 */
886
887 x25_limit_facilities(&facilities, nb);
888
889 /*
890 * Try to create a new socket.
891 */
892 make = x25_make_new(sk);
893 if (!make)
894 goto out_sock_put;
895
896 /*
897 * Remove the facilities
898 */
899 skb_pull(skb, len);
900
901 skb->sk = make;
902 make->sk_state = TCP_ESTABLISHED;
903
904 makex25 = x25_sk(make);
905 makex25->lci = lci;
906 makex25->dest_addr = dest_addr;
907 makex25->source_addr = source_addr;
908 makex25->neighbour = nb;
909 makex25->facilities = facilities;
910 makex25->vc_facil_mask = x25_sk(sk)->vc_facil_mask;
cb65d506
SP		 911 /* ensure no reverse facil on accept */
912 makex25->vc_facil_mask &= ~X25_MASK_REVERSE;
913 makex25->cudmatchlength = x25_sk(sk)->cudmatchlength;
1da177e4 914
ebc3f64b
SP		 915 /* Normally all calls are accepted immediatly */
916 if(makex25->accptapprv & X25_DENY_ACCPT_APPRV) {
917 x25_write_internal(make, X25_CALL_ACCEPTED);
918 makex25->state = X25_STATE_3;
919 }
1da177e4 920
cb65d506
SP		 921 /*
922 * Incoming Call User Data.
923 */
924 if (skb->len >= 0) {
925 memcpy(makex25->calluserdata.cuddata, skb->data, skb->len);
926 makex25->calluserdata.cudlength = skb->len;
927 }
928
1da177e4
LT		 929 sk->sk_ack_backlog++;
930
931 x25_insert_socket(make);
932
933 skb_queue_head(&sk->sk_receive_queue, skb);
934
935 x25_start_heartbeat(make);
936
937 if (!sock_flag(sk, SOCK_DEAD))
938 sk->sk_data_ready(sk, skb->len);
939 rc = 1;
940 sock_put(sk);
941out:
942 return rc;
943out_sock_put:
944 sock_put(sk);
945out_clear_request:
946 rc = 0;
947 x25_transmit_clear_request(nb, lci, 0x01);
948 goto out;
949}
950
951static int x25_sendmsg(struct kiocb *iocb, struct socket *sock,
952 struct msghdr *msg, size_t len)
953{
954 struct sock *sk = sock->sk;
955 struct x25_sock *x25 = x25_sk(sk);
956 struct sockaddr_x25 *usx25 = (struct sockaddr_x25 *)msg->msg_name;
957 struct sockaddr_x25 sx25;
958 struct sk_buff *skb;
959 unsigned char *asmptr;
960 int noblock = msg->msg_flags & MSG_DONTWAIT;
961 size_t size;
962 int qbit = 0, rc = -EINVAL;
963
964 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_OOB|MSG_EOR|MSG_CMSG_COMPAT))
965 goto out;
966
967 /* we currently don't support segmented records at the user interface */
968 if (!(msg->msg_flags & (MSG_EOR|MSG_OOB)))
969 goto out;
970
971 rc = -EADDRNOTAVAIL;
972 if (sock_flag(sk, SOCK_ZAPPED))
973 goto out;
974
975 rc = -EPIPE;
976 if (sk->sk_shutdown & SEND_SHUTDOWN) {
977 send_sig(SIGPIPE, current, 0);
978 goto out;
979 }
980
981 rc = -ENETUNREACH;
982 if (!x25->neighbour)
983 goto out;
984
985 if (usx25) {
986 rc = -EINVAL;
987 if (msg->msg_namelen < sizeof(sx25))
988 goto out;
989 memcpy(&sx25, usx25, sizeof(sx25));
990 rc = -EISCONN;
991 if (strcmp(x25->dest_addr.x25_addr, sx25.sx25_addr.x25_addr))
992 goto out;
993 rc = -EINVAL;
994 if (sx25.sx25_family != AF_X25)
995 goto out;
996 } else {
997 /*
998 * FIXME 1003.1g - if the socket is like this because
999 * it has become closed (not started closed) we ought
1000 * to SIGPIPE, EPIPE;
1001 */
1002 rc = -ENOTCONN;
1003 if (sk->sk_state != TCP_ESTABLISHED)
1004 goto out;
1005
1006 sx25.sx25_family = AF_X25;
1007 sx25.sx25_addr = x25->dest_addr;
1008 }
1009
1010 SOCK_DEBUG(sk, "x25_sendmsg: sendto: Addresses built.\n");
1011
1012 /* Build a packet */
1013 SOCK_DEBUG(sk, "x25_sendmsg: sendto: building packet.\n");
1014
1015 if ((msg->msg_flags & MSG_OOB) && len > 32)
1016 len = 32;
1017
1018 size = len + X25_MAX_L2_LEN + X25_EXT_MIN_LEN;
1019
1020 skb = sock_alloc_send_skb(sk, size, noblock, &rc);
1021 if (!skb)
1022 goto out;
1023 X25_SKB_CB(skb)->flags = msg->msg_flags;
1024
1025 skb_reserve(skb, X25_MAX_L2_LEN + X25_EXT_MIN_LEN);
1026
1027 /*
1028 * Put the data on the end
1029 */
1030 SOCK_DEBUG(sk, "x25_sendmsg: Copying user data\n");
1031
1032 asmptr = skb->h.raw = skb_put(skb, len);
1033
1034 rc = memcpy_fromiovec(asmptr, msg->msg_iov, len);
1035 if (rc)
1036 goto out_kfree_skb;
1037
1038 /*
1039 * If the Q BIT Include socket option is in force, the first
1040 * byte of the user data is the logical value of the Q Bit.
1041 */
1042 if (x25->qbitincl) {
1043 qbit = skb->data[0];
1044 skb_pull(skb, 1);
1045 }
1046
1047 /*
1048 * Push down the X.25 header
1049 */
1050 SOCK_DEBUG(sk, "x25_sendmsg: Building X.25 Header.\n");
1051
1052 if (msg->msg_flags & MSG_OOB) {
1053 if (x25->neighbour->extended) {
1054 asmptr = skb_push(skb, X25_STD_MIN_LEN);
1055 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ;
1056 *asmptr++ = (x25->lci >> 0) & 0xFF;
1057 *asmptr++ = X25_INTERRUPT;
1058 } else {
1059 asmptr = skb_push(skb, X25_STD_MIN_LEN);
1060 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ;
1061 *asmptr++ = (x25->lci >> 0) & 0xFF;
1062 *asmptr++ = X25_INTERRUPT;
1063 }
1064 } else {
1065 if (x25->neighbour->extended) {
1066 /* Build an Extended X.25 header */
1067 asmptr = skb_push(skb, X25_EXT_MIN_LEN);
1068 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ;
1069 *asmptr++ = (x25->lci >> 0) & 0xFF;
1070 *asmptr++ = X25_DATA;
1071 *asmptr++ = X25_DATA;
1072 } else {
1073 /* Build an Standard X.25 header */
1074 asmptr = skb_push(skb, X25_STD_MIN_LEN);
1075 *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ;
1076 *asmptr++ = (x25->lci >> 0) & 0xFF;
1077 *asmptr++ = X25_DATA;
1078 }
1079
1080 if (qbit)
1081 skb->data[0] |= X25_Q_BIT;
1082 }
1083
1084 SOCK_DEBUG(sk, "x25_sendmsg: Built header.\n");
1085 SOCK_DEBUG(sk, "x25_sendmsg: Transmitting buffer\n");
1086
1087 rc = -ENOTCONN;
1088 if (sk->sk_state != TCP_ESTABLISHED)
1089 goto out_kfree_skb;
1090
1091 if (msg->msg_flags & MSG_OOB)
1092 skb_queue_tail(&x25->interrupt_out_queue, skb);
1093 else {
1094 len = x25_output(sk, skb);
1095 if (len < 0)
1096 kfree_skb(skb);
1097 else if (x25->qbitincl)
1098 len++;
1099 }
1100
1101 /*
1102 * lock_sock() is currently only used to serialize this x25_kick()
1103 * against input-driven x25_kick() calls. It currently only blocks
1104 * incoming packets for this socket and does not protect against
1105 * any other socket state changes and is not called from anywhere
1106 * else. As x25_kick() cannot block and as long as all socket
1107 * operations are BKL-wrapped, we don't need take to care about
1108 * purging the backlog queue in x25_release().
1109 *
1110 * Using lock_sock() to protect all socket operations entirely
1111 * (and making the whole x25 stack SMP aware) unfortunately would
1112 * require major changes to {send,recv}msg and skb allocation methods.
1113 * -> 2.5 ;)
1114 */
1115 lock_sock(sk);
1116 x25_kick(sk);
1117 release_sock(sk);
1118 rc = len;
1119out:
1120 return rc;
1121out_kfree_skb:
1122 kfree_skb(skb);
1123 goto out;
1124}
1125
1126
1127static int x25_recvmsg(struct kiocb *iocb, struct socket *sock,
1128 struct msghdr *msg, size_t size,
1129 int flags)
1130{
1131 struct sock *sk = sock->sk;
1132 struct x25_sock *x25 = x25_sk(sk);
1133 struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name;
1134 size_t copied;
1135 int qbit;
1136 struct sk_buff *skb;
1137 unsigned char *asmptr;
1138 int rc = -ENOTCONN;
1139
1140 /*
1141 * This works for seqpacket too. The receiver has ordered the queue for
1142 * us! We do one quick check first though
1143 */
1144 if (sk->sk_state != TCP_ESTABLISHED)
1145 goto out;
1146
1147 if (flags & MSG_OOB) {
1148 rc = -EINVAL;
1149 if (sock_flag(sk, SOCK_URGINLINE) ||
1150 !skb_peek(&x25->interrupt_in_queue))
1151 goto out;
1152
1153 skb = skb_dequeue(&x25->interrupt_in_queue);
1154
1155 skb_pull(skb, X25_STD_MIN_LEN);
1156
1157 /*
1158 * No Q bit information on Interrupt data.
1159 */
1160 if (x25->qbitincl) {
1161 asmptr = skb_push(skb, 1);
1162 *asmptr = 0x00;
1163 }
1164
1165 msg->msg_flags |= MSG_OOB;
1166 } else {
1167 /* Now we can treat all alike */
1168 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1169 flags & MSG_DONTWAIT, &rc);
1170 if (!skb)
1171 goto out;
1172
1173 qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT;
1174
1175 skb_pull(skb, x25->neighbour->extended ?
1176 X25_EXT_MIN_LEN : X25_STD_MIN_LEN);
1177
1178 if (x25->qbitincl) {
1179 asmptr = skb_push(skb, 1);
1180 *asmptr = qbit;
1181 }
1182 }
1183
1184 skb->h.raw = skb->data;
1185
1186 copied = skb->len;
1187
1188 if (copied > size) {
1189 copied = size;
1190 msg->msg_flags |= MSG_TRUNC;
1191 }
1192
1193 /* Currently, each datagram always contains a complete record */
1194 msg->msg_flags |= MSG_EOR;
1195
1196 rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1197 if (rc)
1198 goto out_free_dgram;
1199
1200 if (sx25) {
1201 sx25->sx25_family = AF_X25;
1202 sx25->sx25_addr = x25->dest_addr;
1203 }
1204
1205 msg->msg_namelen = sizeof(struct sockaddr_x25);
1206
1207 lock_sock(sk);
1208 x25_check_rbuf(sk);
1209 release_sock(sk);
1210 rc = copied;
1211out_free_dgram:
1212 skb_free_datagram(sk, skb);
1213out:
1214 return rc;
1215}
1216
1217
1218static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1219{
1220 struct sock *sk = sock->sk;
1221 struct x25_sock *x25 = x25_sk(sk);
1222 void __user *argp = (void __user *)arg;
1223 int rc;
1224
1225 switch (cmd) {
1226 case TIOCOUTQ: {
1227 int amount = sk->sk_sndbuf -
1228 atomic_read(&sk->sk_wmem_alloc);
1229 if (amount < 0)
1230 amount = 0;
1231 rc = put_user(amount, (unsigned int __user *)argp);
1232 break;
1233 }
1234
1235 case TIOCINQ: {
1236 struct sk_buff *skb;
1237 int amount = 0;
1238 /*
1239 * These two are safe on a single CPU system as
1240 * only user tasks fiddle here
1241 */
1242 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1243 amount = skb->len;
1244 rc = put_user(amount, (unsigned int __user *)argp);
1245 break;
1246 }
1247
1248 case SIOCGSTAMP:
1249 rc = -EINVAL;
1250 if (sk)
1251 rc = sock_get_timestamp(sk,
1252 (struct timeval __user *)argp);
1253 break;
1254 case SIOCGIFADDR:
1255 case SIOCSIFADDR:
1256 case SIOCGIFDSTADDR:
1257 case SIOCSIFDSTADDR:
1258 case SIOCGIFBRDADDR:
1259 case SIOCSIFBRDADDR:
1260 case SIOCGIFNETMASK:
1261 case SIOCSIFNETMASK:
1262 case SIOCGIFMETRIC:
1263 case SIOCSIFMETRIC:
1264 rc = -EINVAL;
1265 break;
1266 case SIOCADDRT:
1267 case SIOCDELRT:
1268 rc = -EPERM;
1269 if (!capable(CAP_NET_ADMIN))
1270 break;
1271 rc = x25_route_ioctl(cmd, argp);
1272 break;
1273 case SIOCX25GSUBSCRIP:
1274 rc = x25_subscr_ioctl(cmd, argp);
1275 break;
1276 case SIOCX25SSUBSCRIP:
1277 rc = -EPERM;
1278 if (!capable(CAP_NET_ADMIN))
1279 break;
1280 rc = x25_subscr_ioctl(cmd, argp);
1281 break;
1282 case SIOCX25GFACILITIES: {
1283 struct x25_facilities fac = x25->facilities;
1284 rc = copy_to_user(argp, &fac,
1285 sizeof(fac)) ? -EFAULT : 0;
1286 break;
1287 }
1288
1289 case SIOCX25SFACILITIES: {
1290 struct x25_facilities facilities;
1291 rc = -EFAULT;
1292 if (copy_from_user(&facilities, argp,
1293 sizeof(facilities)))
1294 break;
1295 rc = -EINVAL;
1296 if (sk->sk_state != TCP_LISTEN &&
1297 sk->sk_state != TCP_CLOSE)
1298 break;
1299 if (facilities.pacsize_in < X25_PS16 ||
1300 facilities.pacsize_in > X25_PS4096)
1301 break;
1302 if (facilities.pacsize_out < X25_PS16 ||
1303 facilities.pacsize_out > X25_PS4096)
1304 break;
1305 if (facilities.winsize_in < 1 ||
1306 facilities.winsize_in > 127)
1307 break;
1308 if (facilities.throughput < 0x03 ||
1309 facilities.throughput > 0xDD)
1310 break;
ebc3f64b
SP		 1311 if (facilities.reverse &&
1312 (facilities.reverse | 0x81)!= 0x81)
1da177e4
LT		 1313 break;
1314 x25->facilities = facilities;
1315 rc = 0;
1316 break;
1317 }
1318
1319 case SIOCX25GCALLUSERDATA: {
1320 struct x25_calluserdata cud = x25->calluserdata;
1321 rc = copy_to_user(argp, &cud,
1322 sizeof(cud)) ? -EFAULT : 0;
1323 break;
1324 }
1325
1326 case SIOCX25SCALLUSERDATA: {
1327 struct x25_calluserdata calluserdata;
1328
1329 rc = -EFAULT;
1330 if (copy_from_user(&calluserdata, argp,
1331 sizeof(calluserdata)))
1332 break;
1333 rc = -EINVAL;
1334 if (calluserdata.cudlength > X25_MAX_CUD_LEN)
1335 break;
1336 x25->calluserdata = calluserdata;
1337 rc = 0;
1338 break;
1339 }
1340
1341 case SIOCX25GCAUSEDIAG: {
1342 struct x25_causediag causediag;
1343 causediag = x25->causediag;
1344 rc = copy_to_user(argp, &causediag,
1345 sizeof(causediag)) ? -EFAULT : 0;
1346 break;
1347 }
1348
cb65d506
SP		 1349 case SIOCX25SCUDMATCHLEN: {
1350 struct x25_subaddr sub_addr;
1351 rc = -EINVAL;
1352 if(sk->sk_state != TCP_CLOSE)
1353 break;
1354 rc = -EFAULT;
1355 if (copy_from_user(&sub_addr, argp,
1356 sizeof(sub_addr)))
1357 break;
1358 rc = -EINVAL;
1359 if(sub_addr.cudmatchlength > X25_MAX_CUD_LEN)
1360 break;
1361 x25->cudmatchlength = sub_addr.cudmatchlength;
1362 rc = 0;
1363 break;
1364 }
1365
ebc3f64b
SP		 1366 case SIOCX25CALLACCPTAPPRV: {
1367 rc = -EINVAL;
1368 if (sk->sk_state != TCP_CLOSE)
1369 break;
1370 x25->accptapprv = X25_ALLOW_ACCPT_APPRV;
1371 rc = 0;
1372 break;
1373 }
1374
1375 case SIOCX25SENDCALLACCPT: {
1376 rc = -EINVAL;
1377 if (sk->sk_state != TCP_ESTABLISHED)
1378 break;
1379 if (x25->accptapprv) /* must call accptapprv above */
1380 break;
1381 x25_write_internal(sk, X25_CALL_ACCEPTED);
1382 x25->state = X25_STATE_3;
1383 rc = 0;
1384 break;
1385 }
1386
1da177e4 1387 default:
b5e5fa5e 1388 rc = -ENOIOCTLCMD;
1da177e4
LT		 1389 break;
1390 }
1391
1392 return rc;
1393}
1394
1395static struct net_proto_family x25_family_ops = {
1396 .family = AF_X25,
1397 .create = x25_create,
1398 .owner = THIS_MODULE,
1399};
1400
1b06e6ba
SP		 1401#ifdef CONFIG_COMPAT
1402static int compat_x25_subscr_ioctl(unsigned int cmd,
1403 struct compat_x25_subscrip_struct __user *x25_subscr32)
1404{
1405 struct compat_x25_subscrip_struct x25_subscr;
1406 struct x25_neigh *nb;
1407 struct net_device *dev;
1408 int rc = -EINVAL;
1409
1410 rc = -EFAULT;
1411 if (copy_from_user(&x25_subscr, x25_subscr32, sizeof(*x25_subscr32)))
1412 goto out;
1413
1414 rc = -EINVAL;
1415 dev = x25_dev_get(x25_subscr.device);
1416 if (dev == NULL)
1417 goto out;
1418
1419 nb = x25_get_neigh(dev);
1420 if (nb == NULL)
1421 goto out_dev_put;
1422
1423 dev_put(dev);
1424
1425 if (cmd == SIOCX25GSUBSCRIP) {
1426 x25_subscr.extended = nb->extended;
1427 x25_subscr.global_facil_mask = nb->global_facil_mask;
1428 rc = copy_to_user(x25_subscr32, &x25_subscr,
1429 sizeof(*x25_subscr32)) ? -EFAULT : 0;
1430 } else {
1431 rc = -EINVAL;
1432 if (x25_subscr.extended == 0 || x25_subscr.extended == 1) {
1433 rc = 0;
1434 nb->extended = x25_subscr.extended;
1435 nb->global_facil_mask = x25_subscr.global_facil_mask;
1436 }
1437 }
1438 x25_neigh_put(nb);
1439out:
1440 return rc;
1441out_dev_put:
1442 dev_put(dev);
1443 goto out;
1444}
1445
1446static int compat_x25_ioctl(struct socket *sock, unsigned int cmd,
1447 unsigned long arg)
1448{
1449 void __user *argp = compat_ptr(arg);
1450 struct sock *sk = sock->sk;
1451
1452 int rc = -ENOIOCTLCMD;
1453
1454 switch(cmd) {
1455 case TIOCOUTQ:
1456 case TIOCINQ:
1457 rc = x25_ioctl(sock, cmd, (unsigned long)argp);
1458 break;
1459 case SIOCGSTAMP:
1460 rc = -EINVAL;
1461 if (sk)
1462 rc = compat_sock_get_timestamp(sk,
1463 (struct timeval __user*)argp);
1464 break;
1465 case SIOCGIFADDR:
1466 case SIOCSIFADDR:
1467 case SIOCGIFDSTADDR:
1468 case SIOCSIFDSTADDR:
1469 case SIOCGIFBRDADDR:
1470 case SIOCSIFBRDADDR:
1471 case SIOCGIFNETMASK:
1472 case SIOCSIFNETMASK:
1473 case SIOCGIFMETRIC:
1474 case SIOCSIFMETRIC:
1475 rc = -EINVAL;
1476 break;
1477 case SIOCADDRT:
1478 case SIOCDELRT:
1479 rc = -EPERM;
1480 if (!capable(CAP_NET_ADMIN))
1481 break;
1482 rc = x25_route_ioctl(cmd, argp);
1483 break;
1484 case SIOCX25GSUBSCRIP:
1485 rc = compat_x25_subscr_ioctl(cmd, argp);
1486 break;
1487 case SIOCX25SSUBSCRIP:
1488 rc = -EPERM;
1489 if (!capable(CAP_NET_ADMIN))
1490 break;
1491 rc = compat_x25_subscr_ioctl(cmd, argp);
1492 break;
1493 case SIOCX25GFACILITIES:
1494 case SIOCX25SFACILITIES:
1495 case SIOCX25GCALLUSERDATA:
1496 case SIOCX25SCALLUSERDATA:
1497 case SIOCX25GCAUSEDIAG:
1498 case SIOCX25SCUDMATCHLEN:
1499 case SIOCX25CALLACCPTAPPRV:
1500 case SIOCX25SENDCALLACCPT:
1501 rc = x25_ioctl(sock, cmd, (unsigned long)argp);
1502 break;
1503 default:
1504 rc = -ENOIOCTLCMD;
1505 break;
1506 }
1507 return rc;
1508}
1509#endif
1510
90ddc4f0 1511static const struct proto_ops SOCKOPS_WRAPPED(x25_proto_ops) = {
1da177e4
LT		 1512 .family = AF_X25,
1513 .owner = THIS_MODULE,
1514 .release = x25_release,
1515 .bind = x25_bind,
1516 .connect = x25_connect,
1517 .socketpair = sock_no_socketpair,
1518 .accept = x25_accept,
1519 .getname = x25_getname,
1520 .poll = datagram_poll,
1521 .ioctl = x25_ioctl,
1b06e6ba
SP		 1522#ifdef CONFIG_COMPAT
1523 .compat_ioctl = compat_x25_ioctl,
1524#endif
1da177e4
LT		 1525 .listen = x25_listen,
1526 .shutdown = sock_no_shutdown,
1527 .setsockopt = x25_setsockopt,
1528 .getsockopt = x25_getsockopt,
1529 .sendmsg = x25_sendmsg,
1530 .recvmsg = x25_recvmsg,
1531 .mmap = sock_no_mmap,
1532 .sendpage = sock_no_sendpage,
1533};
1534
1535#include <linux/smp_lock.h>
1536SOCKOPS_WRAP(x25_proto, AF_X25);
1537
1538static struct packet_type x25_packet_type = {
1539 .type = __constant_htons(ETH_P_X25),
1540 .func = x25_lapb_receive_frame,
1541};
1542
1543static struct notifier_block x25_dev_notifier = {
1544 .notifier_call = x25_device_event,
1545};
1546
1547void x25_kill_by_neigh(struct x25_neigh *nb)
1548{
1549 struct sock *s;
1550 struct hlist_node *node;
1551
1552 write_lock_bh(&x25_list_lock);
1553
1554 sk_for_each(s, node, &x25_list)
1555 if (x25_sk(s)->neighbour == nb)
1556 x25_disconnect(s, ENETUNREACH, 0, 0);
1557
1558 write_unlock_bh(&x25_list_lock);
1559}
1560
1561static int __init x25_init(void)
1562{
1563 int rc = proto_register(&x25_proto, 0);
1564
1565 if (rc != 0)
1566 goto out;
1567
1568 sock_register(&x25_family_ops);
1569
1570 dev_add_pack(&x25_packet_type);
1571
1572 register_netdevice_notifier(&x25_dev_notifier);
1573
1574 printk(KERN_INFO "X.25 for Linux. Version 0.2 for Linux 2.1.15\n");
1575
1576#ifdef CONFIG_SYSCTL
1577 x25_register_sysctl();
1578#endif
1579 x25_proc_init();
1580out:
1581 return rc;
1582}
1583module_init(x25_init);
1584
1585static void __exit x25_exit(void)
1586{
1587 x25_proc_exit();
1588 x25_link_free();
1589 x25_route_free();
1590
1591#ifdef CONFIG_SYSCTL
1592 x25_unregister_sysctl();
1593#endif
1594
1595 unregister_netdevice_notifier(&x25_dev_notifier);
1596
1597 dev_remove_pack(&x25_packet_type);
1598
1599 sock_unregister(AF_X25);
1600 proto_unregister(&x25_proto);
1601}
1602module_exit(x25_exit);
1603
1604MODULE_AUTHOR("Jonathan Naylor <g4klx@g4klx.demon.co.uk>");
1605MODULE_DESCRIPTION("The X.25 Packet Layer network layer protocol");
1606MODULE_LICENSE("GPL");
1607MODULE_ALIAS_NETPROTO(PF_X25);
Clone of davem's net-next-2.6 tree