projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetoot...
[deliverable/linux.git] / net / ax25 / af_ax25.c
CommitLineData
1da177e4
LT		 1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
8 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
9 * Copyright (C) Darryl Miles G7LED (dlm@g7led.demon.co.uk)
10 * Copyright (C) Steven Whitehouse GW7RRM (stevew@acm.org)
11 * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
12 * Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de)
13 * Copyright (C) Hans Alblas PE1AYX (hans@esrac.ele.tue.nl)
14 * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
15 */
4fc268d2 16#include <linux/capability.h>
1da177e4
LT		 17#include <linux/module.h>
18#include <linux/errno.h>
19#include <linux/types.h>
20#include <linux/socket.h>
21#include <linux/in.h>
22#include <linux/kernel.h>
23#include <linux/sched.h>
24#include <linux/timer.h>
25#include <linux/string.h>
1da177e4
LT		 26#include <linux/sockios.h>
27#include <linux/net.h>
5a0e3ad6 28#include <linux/slab.h>
1da177e4
LT		 29#include <net/ax25.h>
30#include <linux/inet.h>
31#include <linux/netdevice.h>
32#include <linux/if_arp.h>
33#include <linux/skbuff.h>
34#include <net/sock.h>
35#include <asm/uaccess.h>
1da177e4
LT		 36#include <linux/fcntl.h>
37#include <linux/termios.h> /* For TIOCINQ/OUTQ */
38#include <linux/mm.h>
39#include <linux/interrupt.h>
40#include <linux/notifier.h>
41#include <linux/proc_fs.h>
42#include <linux/stat.h>
1da177e4
LT		 43#include <linux/sysctl.h>
44#include <linux/init.h>
45#include <linux/spinlock.h>
457c4cbc 46#include <net/net_namespace.h>
c752f073 47#include <net/tcp_states.h>
1da177e4
LT		 48#include <net/ip.h>
49#include <net/arp.h>
50
51
52
53HLIST_HEAD(ax25_list);
54DEFINE_SPINLOCK(ax25_list_lock);
55
90ddc4f0 56static const struct proto_ops ax25_proto_ops;
1da177e4
LT		 57
58static void ax25_free_sock(struct sock *sk)
59{
3200392b 60 ax25_cb_put(sk_to_ax25(sk));
1da177e4
LT		 61}
62
63/*
64 * Socket removal during an interrupt is now safe.
65 */
66static void ax25_cb_del(ax25_cb *ax25)
67{
68 if (!hlist_unhashed(&ax25->ax25_node)) {
69 spin_lock_bh(&ax25_list_lock);
70 hlist_del_init(&ax25->ax25_node);
71 spin_unlock_bh(&ax25_list_lock);
72 ax25_cb_put(ax25);
73 }
74}
75
76/*
77 * Kill all bound sockets on a dropped device.
78 */
79static void ax25_kill_by_device(struct net_device *dev)
80{
81 ax25_dev *ax25_dev;
82 ax25_cb *s;
1da177e4
LT		 83
84 if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
85 return;
86
87 spin_lock_bh(&ax25_list_lock);
ecd2ebde 88again:
b67bfe0d 89 ax25_for_each(s, &ax25_list) {
1da177e4
LT		 90 if (s->ax25_dev == ax25_dev) {
91 s->ax25_dev = NULL;
ecd2ebde 92 spin_unlock_bh(&ax25_list_lock);
1da177e4 93 ax25_disconnect(s, ENETUNREACH);
ecd2ebde
JP		 94 spin_lock_bh(&ax25_list_lock);
95
96 /* The entry could have been deleted from the
97 * list meanwhile and thus the next pointer is
98 * no longer valid. Play it safe and restart
99 * the scan. Forward progress is ensured
100 * because we set s->ax25_dev to NULL and we
101 * are never passed a NULL 'dev' argument.
102 */
103 goto again;
1da177e4
LT		 104 }
105 }
106 spin_unlock_bh(&ax25_list_lock);
107}
108
109/*
110 * Handle device status changes.
111 */
112static int ax25_device_event(struct notifier_block *this, unsigned long event,
351638e7 113 void *ptr)
1da177e4 114{
351638e7 115 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1da177e4 116
721499e8 117 if (!net_eq(dev_net(dev), &init_net))
e9dc8653
EB		 118 return NOTIFY_DONE;
119
1da177e4
LT		 120 /* Reject non AX.25 devices */
121 if (dev->type != ARPHRD_AX25)
122 return NOTIFY_DONE;
123
124 switch (event) {
125 case NETDEV_UP:
126 ax25_dev_device_up(dev);
127 break;
128 case NETDEV_DOWN:
129 ax25_kill_by_device(dev);
130 ax25_rt_device_down(dev);
131 ax25_dev_device_down(dev);
132 break;
133 default:
134 break;
135 }
136
137 return NOTIFY_DONE;
138}
139
140/*
141 * Add a socket to the bound sockets list.
142 */
143void ax25_cb_add(ax25_cb *ax25)
144{
145 spin_lock_bh(&ax25_list_lock);
146 ax25_cb_hold(ax25);
147 hlist_add_head(&ax25->ax25_node, &ax25_list);
148 spin_unlock_bh(&ax25_list_lock);
149}
150
151/*
152 * Find a socket that wants to accept the SABM we have just
153 * received.
154 */
155struct sock *ax25_find_listener(ax25_address *addr, int digi,
156 struct net_device *dev, int type)
157{
158 ax25_cb *s;
1da177e4 159
c19c4b9c 160 spin_lock(&ax25_list_lock);
b67bfe0d 161 ax25_for_each(s, &ax25_list) {
1da177e4
LT		 162 if ((s->iamdigi && !digi) || (!s->iamdigi && digi))
163 continue;
164 if (s->sk && !ax25cmp(&s->source_addr, addr) &&
165 s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) {
166 /* If device is null we match any device */
167 if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) {
168 sock_hold(s->sk);
c19c4b9c 169 spin_unlock(&ax25_list_lock);
1da177e4
LT		 170 return s->sk;
171 }
172 }
173 }
c19c4b9c 174 spin_unlock(&ax25_list_lock);
1da177e4
LT		 175
176 return NULL;
177}
178
179/*
180 * Find an AX.25 socket given both ends.
181 */
182struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr,
183 int type)
184{
185 struct sock *sk = NULL;
186 ax25_cb *s;
1da177e4 187
c19c4b9c 188 spin_lock(&ax25_list_lock);
b67bfe0d 189 ax25_for_each(s, &ax25_list) {
1da177e4
LT		 190 if (s->sk && !ax25cmp(&s->source_addr, my_addr) &&
191 !ax25cmp(&s->dest_addr, dest_addr) &&
192 s->sk->sk_type == type) {
193 sk = s->sk;
194 sock_hold(sk);
195 break;
196 }
197 }
198
c19c4b9c 199 spin_unlock(&ax25_list_lock);
1da177e4
LT		 200
201 return sk;
202}
203
204/*
205 * Find an AX.25 control block given both ends. It will only pick up
206 * floating AX.25 control blocks or non Raw socket bound control blocks.
207 */
208ax25_cb *ax25_find_cb(ax25_address *src_addr, ax25_address *dest_addr,
209 ax25_digi *digi, struct net_device *dev)
210{
211 ax25_cb *s;
1da177e4
LT		 212
213 spin_lock_bh(&ax25_list_lock);
b67bfe0d 214 ax25_for_each(s, &ax25_list) {
1da177e4
LT		 215 if (s->sk && s->sk->sk_type != SOCK_SEQPACKET)
216 continue;
217 if (s->ax25_dev == NULL)
218 continue;
219 if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) {
220 if (digi != NULL && digi->ndigi != 0) {
221 if (s->digipeat == NULL)
222 continue;
223 if (ax25digicmp(s->digipeat, digi) != 0)
224 continue;
225 } else {
226 if (s->digipeat != NULL && s->digipeat->ndigi != 0)
227 continue;
228 }
229 ax25_cb_hold(s);
230 spin_unlock_bh(&ax25_list_lock);
231
232 return s;
233 }
234 }
235 spin_unlock_bh(&ax25_list_lock);
236
237 return NULL;
238}
239
70868eac
RB		 240EXPORT_SYMBOL(ax25_find_cb);
241
1da177e4
LT		 242void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto)
243{
244 ax25_cb *s;
245 struct sk_buff *copy;
1da177e4 246
c19c4b9c 247 spin_lock(&ax25_list_lock);
b67bfe0d 248 ax25_for_each(s, &ax25_list) {
1da177e4
LT		 249 if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 &&
250 s->sk->sk_type == SOCK_RAW &&
251 s->sk->sk_protocol == proto &&
252 s->ax25_dev->dev == skb->dev &&
253 atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) {
254 if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL)
255 continue;
256 if (sock_queue_rcv_skb(s->sk, copy) != 0)
257 kfree_skb(copy);
258 }
259 }
c19c4b9c 260 spin_unlock(&ax25_list_lock);
1da177e4
LT		 261}
262
263/*
264 * Deferred destroy.
265 */
266void ax25_destroy_socket(ax25_cb *);
267
268/*
269 * Handler for deferred kills.
270 */
271static void ax25_destroy_timer(unsigned long data)
272{
273 ax25_cb *ax25=(ax25_cb *)data;
274 struct sock *sk;
528930b9 275
1da177e4 276 sk=ax25->sk;
528930b9 277
1da177e4
LT		 278 bh_lock_sock(sk);
279 sock_hold(sk);
280 ax25_destroy_socket(ax25);
281 bh_unlock_sock(sk);
282 sock_put(sk);
283}
284
285/*
286 * This is called from user mode and the timers. Thus it protects itself
287 * against interrupt users but doesn't worry about being called during
288 * work. Once it is removed from the queue no interrupt or bottom half
289 * will touch it and we are (fairly 8-) ) safe.
290 */
291void ax25_destroy_socket(ax25_cb *ax25)
292{
293 struct sk_buff *skb;
294
295 ax25_cb_del(ax25);
296
297 ax25_stop_heartbeat(ax25);
298 ax25_stop_t1timer(ax25);
299 ax25_stop_t2timer(ax25);
300 ax25_stop_t3timer(ax25);
301 ax25_stop_idletimer(ax25);
302
303 ax25_clear_queues(ax25); /* Flush the queues */
304
305 if (ax25->sk != NULL) {
306 while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) {
307 if (skb->sk != ax25->sk) {
308 /* A pending connection */
3200392b 309 ax25_cb *sax25 = sk_to_ax25(skb->sk);
1da177e4
LT		 310
311 /* Queue the unaccepted socket for death */
312 sock_orphan(skb->sk);
313
33d1d2c5
DM		 314 /* 9A4GL: hack to release unaccepted sockets */
315 skb->sk->sk_state = TCP_LISTEN;
316
1da177e4
LT		 317 ax25_start_heartbeat(sax25);
318 sax25->state = AX25_STATE_0;
319 }
320
321 kfree_skb(skb);
322 }
323 skb_queue_purge(&ax25->sk->sk_write_queue);
324 }
325
326 if (ax25->sk != NULL) {
c564039f 327 if (sk_has_allocations(ax25->sk)) {
1da177e4 328 /* Defer: outstanding buffers */
b24b8a24
PE		 329 setup_timer(&ax25->dtimer, ax25_destroy_timer,
330 (unsigned long)ax25);
1da177e4 331 ax25->dtimer.expires = jiffies + 2 * HZ;
1da177e4
LT		 332 add_timer(&ax25->dtimer);
333 } else {
334 struct sock *sk=ax25->sk;
335 ax25->sk=NULL;
336 sock_put(sk);
337 }
338 } else {
339 ax25_cb_put(ax25);
340 }
341}
342
343/*
344 * dl1bke 960311: set parameters for existing AX.25 connections,
345 * includes a KILL command to abort any connection.
346 * VERY useful for debugging ;-)
347 */
348static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
349{
350 struct ax25_ctl_struct ax25_ctl;
351 ax25_digi digi;
352 ax25_dev *ax25_dev;
353 ax25_cb *ax25;
354 unsigned int k;
c0181d42 355 int ret = 0;
1da177e4
LT		 356
357 if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
358 return -EFAULT;
359
360 if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL)
361 return -ENODEV;
362
363 if (ax25_ctl.digi_count > AX25_MAX_DIGIS)
364 return -EINVAL;
365
43ab8502 366 if (ax25_ctl.arg > ULONG_MAX / HZ && ax25_ctl.cmd != AX25_KILL)
367 return -EINVAL;
368
1da177e4
LT		 369 digi.ndigi = ax25_ctl.digi_count;
370 for (k = 0; k < digi.ndigi; k++)
371 digi.calls[k] = ax25_ctl.digi_addr[k];
372
373 if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL)
374 return -ENOTCONN;
375
376 switch (ax25_ctl.cmd) {
377 case AX25_KILL:
378 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
379#ifdef CONFIG_AX25_DAMA_SLAVE
380 if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
381 ax25_dama_off(ax25);
382#endif
383 ax25_disconnect(ax25, ENETRESET);
384 break;
385
528930b9
YH		 386 case AX25_WINDOW:
387 if (ax25->modulus == AX25_MODULUS) {
388 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
c0181d42 389 goto einval_put;
528930b9
YH		 390 } else {
391 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
c0181d42 392 goto einval_put;
528930b9
YH		 393 }
394 ax25->window = ax25_ctl.arg;
395 break;
396
397 case AX25_T1:
be639ac6 398 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
c0181d42 399 goto einval_put;
528930b9
YH		 400 ax25->rtt = (ax25_ctl.arg * HZ) / 2;
401 ax25->t1 = ax25_ctl.arg * HZ;
402 break;
403
404 case AX25_T2:
be639ac6 405 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
c0181d42 406 goto einval_put;
528930b9
YH		 407 ax25->t2 = ax25_ctl.arg * HZ;
408 break;
409
410 case AX25_N2:
411 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
c0181d42 412 goto einval_put;
528930b9
YH		 413 ax25->n2count = 0;
414 ax25->n2 = ax25_ctl.arg;
415 break;
416
417 case AX25_T3:
be639ac6
RB		 418 if (ax25_ctl.arg > ULONG_MAX / HZ)
419 goto einval_put;
528930b9
YH		 420 ax25->t3 = ax25_ctl.arg * HZ;
421 break;
422
423 case AX25_IDLE:
be639ac6
RB		 424 if (ax25_ctl.arg > ULONG_MAX / (60 * HZ))
425 goto einval_put;
426
528930b9
YH		 427 ax25->idle = ax25_ctl.arg * 60 * HZ;
428 break;
429
430 case AX25_PACLEN:
431 if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
c0181d42 432 goto einval_put;
528930b9
YH		 433 ax25->paclen = ax25_ctl.arg;
434 break;
435
436 default:
c0181d42 437 goto einval_put;
1da177e4
LT		 438 }
439
c0181d42
JP		 440out_put:
441 ax25_cb_put(ax25);
442 return ret;
443
444einval_put:
445 ret = -EINVAL;
446 goto out_put;
1da177e4
LT		 447}
448
e1fdb5b3
RB		 449static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev)
450{
451 ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2;
452 ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]);
453 ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]);
454 ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]);
455 ax25->n2 = ax25_dev->values[AX25_VALUES_N2];
456 ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN];
457 ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]);
458 ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF];
459
460 if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) {
461 ax25->modulus = AX25_EMODULUS;
462 ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
463 } else {
464 ax25->modulus = AX25_MODULUS;
465 ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
466 }
467}
468
1da177e4
LT		 469/*
470 * Fill in a created AX.25 created control block with the default
471 * values for a particular device.
472 */
473void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev)
474{
475 ax25->ax25_dev = ax25_dev;
476
477 if (ax25->ax25_dev != NULL) {
e1fdb5b3
RB		 478 ax25_fillin_cb_from_dev(ax25, ax25_dev);
479 return;
480 }
481
482 /*
483 * No device, use kernel / AX.25 spec default values
484 */
485 ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2;
486 ax25->t1 = msecs_to_jiffies(AX25_DEF_T1);
487 ax25->t2 = msecs_to_jiffies(AX25_DEF_T2);
488 ax25->t3 = msecs_to_jiffies(AX25_DEF_T3);
489 ax25->n2 = AX25_DEF_N2;
490 ax25->paclen = AX25_DEF_PACLEN;
491 ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE);
492 ax25->backoff = AX25_DEF_BACKOFF;
493
494 if (AX25_DEF_AXDEFMODE) {
495 ax25->modulus = AX25_EMODULUS;
496 ax25->window = AX25_DEF_EWINDOW;
1da177e4 497 } else {
e1fdb5b3
RB		 498 ax25->modulus = AX25_MODULUS;
499 ax25->window = AX25_DEF_WINDOW;
1da177e4
LT		 500 }
501}
502
503/*
504 * Create an empty AX.25 control block.
505 */
506ax25_cb *ax25_create_cb(void)
507{
508 ax25_cb *ax25;
509
1b30dd35 510 if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL)
1da177e4
LT		 511 return NULL;
512
1da177e4
LT		 513 atomic_set(&ax25->refcount, 1);
514
515 skb_queue_head_init(&ax25->write_queue);
516 skb_queue_head_init(&ax25->frag_queue);
517 skb_queue_head_init(&ax25->ack_queue);
518 skb_queue_head_init(&ax25->reseq_queue);
519
21fab4a8 520 ax25_setup_timers(ax25);
1da177e4
LT		 521
522 ax25_fillin_cb(ax25, NULL);
523
524 ax25->state = AX25_STATE_0;
525
526 return ax25;
527}
528
529/*
530 * Handling for system calls applied via the various interfaces to an
531 * AX25 socket object
532 */
533
534static int ax25_setsockopt(struct socket *sock, int level, int optname,
b7058842 535 char __user *optval, unsigned int optlen)
1da177e4
LT		 536{
537 struct sock *sk = sock->sk;
538 ax25_cb *ax25;
539 struct net_device *dev;
540 char devname[IFNAMSIZ];
ba1cffe0
XW		 541 unsigned long opt;
542 int res = 0;
1da177e4
LT		 543
544 if (level != SOL_AX25)
545 return -ENOPROTOOPT;
546
ba1cffe0 547 if (optlen < sizeof(unsigned int))
1da177e4
LT		 548 return -EINVAL;
549
ba1cffe0 550 if (get_user(opt, (unsigned int __user *)optval))
1da177e4
LT		 551 return -EFAULT;
552
553 lock_sock(sk);
3200392b 554 ax25 = sk_to_ax25(sk);
1da177e4
LT		 555
556 switch (optname) {
557 case AX25_WINDOW:
558 if (ax25->modulus == AX25_MODULUS) {
559 if (opt < 1 || opt > 7) {
560 res = -EINVAL;
561 break;
562 }
563 } else {
564 if (opt < 1 || opt > 63) {
565 res = -EINVAL;
566 break;
567 }
568 }
569 ax25->window = opt;
570 break;
571
572 case AX25_T1:
be639ac6 573 if (opt < 1 || opt > ULONG_MAX / HZ) {
1da177e4
LT		 574 res = -EINVAL;
575 break;
576 }
f16f3026 577 ax25->rtt = (opt * HZ) >> 1;
1da177e4
LT		 578 ax25->t1 = opt * HZ;
579 break;
580
581 case AX25_T2:
be639ac6 582 if (opt < 1 || opt > ULONG_MAX / HZ) {
1da177e4
LT		 583 res = -EINVAL;
584 break;
585 }
586 ax25->t2 = opt * HZ;
587 break;
588
589 case AX25_N2:
590 if (opt < 1 || opt > 31) {
591 res = -EINVAL;
592 break;
593 }
594 ax25->n2 = opt;
595 break;
596
597 case AX25_T3:
be639ac6 598 if (opt < 1 || opt > ULONG_MAX / HZ) {
1da177e4
LT		 599 res = -EINVAL;
600 break;
601 }
602 ax25->t3 = opt * HZ;
603 break;
604
605 case AX25_IDLE:
ba1cffe0 606 if (opt > ULONG_MAX / (60 * HZ)) {
1da177e4
LT		 607 res = -EINVAL;
608 break;
609 }
610 ax25->idle = opt * 60 * HZ;
611 break;
612
613 case AX25_BACKOFF:
ba1cffe0 614 if (opt > 2) {
1da177e4
LT		 615 res = -EINVAL;
616 break;
617 }
618 ax25->backoff = opt;
619 break;
620
621 case AX25_EXTSEQ:
622 ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
623 break;
624
625 case AX25_PIDINCL:
626 ax25->pidincl = opt ? 1 : 0;
627 break;
628
629 case AX25_IAMDIGI:
630 ax25->iamdigi = opt ? 1 : 0;
631 break;
632
633 case AX25_PACLEN:
634 if (opt < 16 || opt > 65535) {
635 res = -EINVAL;
636 break;
637 }
638 ax25->paclen = opt;
639 break;
640
641 case SO_BINDTODEVICE:
642 if (optlen > IFNAMSIZ)
2f72291d 643 optlen = IFNAMSIZ;
1da177e4 644
2f72291d
RB		 645 if (copy_from_user(devname, optval, optlen)) {
646 res = -EFAULT;
1da177e4
LT		 647 break;
648 }
649
650 if (sk->sk_type == SOCK_SEQPACKET &&
651 (sock->state != SS_UNCONNECTED ||
652 sk->sk_state == TCP_LISTEN)) {
653 res = -EADDRNOTAVAIL;
2f72291d
RB		 654 break;
655 }
656
657 dev = dev_get_by_name(&init_net, devname);
658 if (!dev) {
659 res = -ENODEV;
1da177e4
LT		 660 break;
661 }
662
663 ax25->ax25_dev = ax25_dev_ax25dev(dev);
664 ax25_fillin_cb(ax25, ax25->ax25_dev);
2f72291d 665 dev_put(dev);
1da177e4
LT		 666 break;
667
668 default:
669 res = -ENOPROTOOPT;
670 }
671 release_sock(sk);
672
673 return res;
674}
675
676static int ax25_getsockopt(struct socket *sock, int level, int optname,
677 char __user *optval, int __user *optlen)
678{
679 struct sock *sk = sock->sk;
680 ax25_cb *ax25;
681 struct ax25_dev *ax25_dev;
682 char devname[IFNAMSIZ];
683 void *valptr;
684 int val = 0;
685 int maxlen, length;
686
687 if (level != SOL_AX25)
688 return -ENOPROTOOPT;
689
690 if (get_user(maxlen, optlen))
691 return -EFAULT;
692
693 if (maxlen < 1)
694 return -EFAULT;
695
696 valptr = (void *) &val;
697 length = min_t(unsigned int, maxlen, sizeof(int));
698
699 lock_sock(sk);
3200392b 700 ax25 = sk_to_ax25(sk);
1da177e4
LT		 701
702 switch (optname) {
703 case AX25_WINDOW:
704 val = ax25->window;
705 break;
706
707 case AX25_T1:
708 val = ax25->t1 / HZ;
709 break;
710
711 case AX25_T2:
712 val = ax25->t2 / HZ;
713 break;
714
715 case AX25_N2:
716 val = ax25->n2;
717 break;
718
719 case AX25_T3:
720 val = ax25->t3 / HZ;
721 break;
722
723 case AX25_IDLE:
724 val = ax25->idle / (60 * HZ);
725 break;
726
727 case AX25_BACKOFF:
728 val = ax25->backoff;
729 break;
730
731 case AX25_EXTSEQ:
732 val = (ax25->modulus == AX25_EMODULUS);
733 break;
734
735 case AX25_PIDINCL:
736 val = ax25->pidincl;
737 break;
738
739 case AX25_IAMDIGI:
740 val = ax25->iamdigi;
741 break;
742
743 case AX25_PACLEN:
744 val = ax25->paclen;
745 break;
746
747 case SO_BINDTODEVICE:
748 ax25_dev = ax25->ax25_dev;
749
750 if (ax25_dev != NULL && ax25_dev->dev != NULL) {
751 strlcpy(devname, ax25_dev->dev->name, sizeof(devname));
752 length = strlen(devname) + 1;
753 } else {
754 *devname = '\0';
755 length = 1;
756 }
757
758 valptr = (void *) devname;
759 break;
760
761 default:
762 release_sock(sk);
763 return -ENOPROTOOPT;
764 }
765 release_sock(sk);
766
767 if (put_user(length, optlen))
768 return -EFAULT;
769
770 return copy_to_user(optval, valptr, length) ? -EFAULT : 0;
771}
772
773static int ax25_listen(struct socket *sock, int backlog)
774{
775 struct sock *sk = sock->sk;
776 int res = 0;
777
778 lock_sock(sk);
779 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) {
780 sk->sk_max_ack_backlog = backlog;
781 sk->sk_state = TCP_LISTEN;
782 goto out;
783 }
784 res = -EOPNOTSUPP;
785
786out:
787 release_sock(sk);
788
789 return res;
790}
791
792/*
793 * XXX: when creating ax25_sock we should update the .obj_size setting
794 * below.
795 */
796static struct proto ax25_proto = {
797 .name = "AX25",
798 .owner = THIS_MODULE,
3200392b 799 .obj_size = sizeof(struct ax25_sock),
1da177e4
LT		 800};
801
3f378b68
EP		 802static int ax25_create(struct net *net, struct socket *sock, int protocol,
803 int kern)
1da177e4
LT		 804{
805 struct sock *sk;
806 ax25_cb *ax25;
807
09ad9bc7 808 if (!net_eq(net, &init_net))
1b8d7ae4
EB		 809 return -EAFNOSUPPORT;
810
1da177e4
LT		 811 switch (sock->type) {
812 case SOCK_DGRAM:
813 if (protocol == 0 || protocol == PF_AX25)
814 protocol = AX25_P_TEXT;
815 break;
816
817 case SOCK_SEQPACKET:
818 switch (protocol) {
819 case 0:
820 case PF_AX25: /* For CLX */
821 protocol = AX25_P_TEXT;
822 break;
823 case AX25_P_SEGMENT:
824#ifdef CONFIG_INET
825 case AX25_P_ARP:
826 case AX25_P_IP:
827#endif
828#ifdef CONFIG_NETROM
829 case AX25_P_NETROM:
830#endif
831#ifdef CONFIG_ROSE
832 case AX25_P_ROSE:
833#endif
834 return -ESOCKTNOSUPPORT;
835#ifdef CONFIG_NETROM_MODULE
836 case AX25_P_NETROM:
837 if (ax25_protocol_is_registered(AX25_P_NETROM))
838 return -ESOCKTNOSUPPORT;
ef764a13 839 break;
1da177e4
LT		 840#endif
841#ifdef CONFIG_ROSE_MODULE
842 case AX25_P_ROSE:
843 if (ax25_protocol_is_registered(AX25_P_ROSE))
844 return -ESOCKTNOSUPPORT;
845#endif
846 default:
847 break;
848 }
849 break;
850
851 case SOCK_RAW:
852 break;
853 default:
854 return -ESOCKTNOSUPPORT;
855 }
856
11aa9c28 857 sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto, kern);
6257ff21 858 if (sk == NULL)
1da177e4
LT		 859 return -ENOMEM;
860
3200392b 861 ax25 = ax25_sk(sk)->cb = ax25_create_cb();
1da177e4
LT		 862 if (!ax25) {
863 sk_free(sk);
864 return -ENOMEM;
865 }
866
867 sock_init_data(sock, sk);
868
869 sk->sk_destruct = ax25_free_sock;
870 sock->ops = &ax25_proto_ops;
871 sk->sk_protocol = protocol;
872
873 ax25->sk = sk;
874
875 return 0;
876}
877
878struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
879{
880 struct sock *sk;
881 ax25_cb *ax25, *oax25;
882
11aa9c28 883 sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot, 0);
6257ff21 884 if (sk == NULL)
1da177e4
LT		 885 return NULL;
886
887 if ((ax25 = ax25_create_cb()) == NULL) {
888 sk_free(sk);
889 return NULL;
890 }
891
892 switch (osk->sk_type) {
893 case SOCK_DGRAM:
894 break;
895 case SOCK_SEQPACKET:
896 break;
897 default:
898 sk_free(sk);
899 ax25_cb_put(ax25);
900 return NULL;
901 }
902
903 sock_init_data(NULL, sk);
904
1da177e4 905 sk->sk_type = osk->sk_type;
1da177e4
LT		 906 sk->sk_priority = osk->sk_priority;
907 sk->sk_protocol = osk->sk_protocol;
908 sk->sk_rcvbuf = osk->sk_rcvbuf;
909 sk->sk_sndbuf = osk->sk_sndbuf;
910 sk->sk_state = TCP_ESTABLISHED;
53b924b3 911 sock_copy_flags(sk, osk);
1da177e4 912
3200392b 913 oax25 = sk_to_ax25(osk);
1da177e4
LT		 914
915 ax25->modulus = oax25->modulus;
916 ax25->backoff = oax25->backoff;
917 ax25->pidincl = oax25->pidincl;
918 ax25->iamdigi = oax25->iamdigi;
919 ax25->rtt = oax25->rtt;
920 ax25->t1 = oax25->t1;
921 ax25->t2 = oax25->t2;
922 ax25->t3 = oax25->t3;
923 ax25->n2 = oax25->n2;
924 ax25->idle = oax25->idle;
925 ax25->paclen = oax25->paclen;
926 ax25->window = oax25->window;
927
928 ax25->ax25_dev = ax25_dev;
929 ax25->source_addr = oax25->source_addr;
930
931 if (oax25->digipeat != NULL) {
0459d70a
ACM		 932 ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
933 GFP_ATOMIC);
934 if (ax25->digipeat == NULL) {
1da177e4
LT		 935 sk_free(sk);
936 ax25_cb_put(ax25);
937 return NULL;
938 }
1da177e4
LT		 939 }
940
3200392b 941 ax25_sk(sk)->cb = ax25;
8c185ab6 942 sk->sk_destruct = ax25_free_sock;
1da177e4
LT		 943 ax25->sk = sk;
944
945 return sk;
946}
947
948static int ax25_release(struct socket *sock)
949{
950 struct sock *sk = sock->sk;
951 ax25_cb *ax25;
952
953 if (sk == NULL)
954 return 0;
955
956 sock_hold(sk);
957 sock_orphan(sk);
958 lock_sock(sk);
3200392b 959 ax25 = sk_to_ax25(sk);
1da177e4
LT		 960
961 if (sk->sk_type == SOCK_SEQPACKET) {
962 switch (ax25->state) {
963 case AX25_STATE_0:
964 release_sock(sk);
965 ax25_disconnect(ax25, 0);
966 lock_sock(sk);
967 ax25_destroy_socket(ax25);
968 break;
969
970 case AX25_STATE_1:
971 case AX25_STATE_2:
972 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
973 release_sock(sk);
974 ax25_disconnect(ax25, 0);
975 lock_sock(sk);
976 ax25_destroy_socket(ax25);
977 break;
978
979 case AX25_STATE_3:
980 case AX25_STATE_4:
981 ax25_clear_queues(ax25);
982 ax25->n2count = 0;
983
984 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
985 case AX25_PROTO_STD_SIMPLEX:
986 case AX25_PROTO_STD_DUPLEX:
987 ax25_send_control(ax25,
988 AX25_DISC,
989 AX25_POLLON,
990 AX25_COMMAND);
991 ax25_stop_t2timer(ax25);
992 ax25_stop_t3timer(ax25);
993 ax25_stop_idletimer(ax25);
994 break;
995#ifdef CONFIG_AX25_DAMA_SLAVE
996 case AX25_PROTO_DAMA_SLAVE:
997 ax25_stop_t3timer(ax25);
998 ax25_stop_idletimer(ax25);
999 break;
1000#endif
1001 }
1002 ax25_calculate_t1(ax25);
1003 ax25_start_t1timer(ax25);
1004 ax25->state = AX25_STATE_2;
1005 sk->sk_state = TCP_CLOSE;
1006 sk->sk_shutdown |= SEND_SHUTDOWN;
1007 sk->sk_state_change(sk);
1008 sock_set_flag(sk, SOCK_DESTROY);
1009 break;
1010
1011 default:
1012 break;
1013 }
1014 } else {
1015 sk->sk_state = TCP_CLOSE;
1016 sk->sk_shutdown |= SEND_SHUTDOWN;
1017 sk->sk_state_change(sk);
1018 ax25_destroy_socket(ax25);
1019 }
1020
1021 sock->sk = NULL;
1022 release_sock(sk);
1023 sock_put(sk);
1024
1025 return 0;
1026}
1027
1028/*
1029 * We support a funny extension here so you can (as root) give any callsign
1030 * digipeated via a local address as source. This hack is obsolete now
1031 * that we've implemented support for SO_BINDTODEVICE. It is however small
1032 * and trivially backward compatible.
1033 */
1034static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1035{
1036 struct sock *sk = sock->sk;
1037 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
1038 ax25_dev *ax25_dev = NULL;
01d7dd0e
RB		 1039 ax25_uid_assoc *user;
1040 ax25_address call;
1da177e4
LT		 1041 ax25_cb *ax25;
1042 int err = 0;
1043
1044 if (addr_len != sizeof(struct sockaddr_ax25) &&
1987e7b4 1045 addr_len != sizeof(struct full_sockaddr_ax25))
1046 /* support for old structure may go away some time
1047 * ax25_bind(): uses old (6 digipeater) socket structure.
1048 */
1da177e4 1049 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1987e7b4 1050 (addr_len > sizeof(struct full_sockaddr_ax25)))
1da177e4 1051 return -EINVAL;
1da177e4
LT		 1052
1053 if (addr->fsa_ax25.sax25_family != AF_AX25)
1054 return -EINVAL;
1055
73400407 1056 user = ax25_findbyuid(current_euid());
01d7dd0e
RB		 1057 if (user) {
1058 call = user->call;
1059 ax25_uid_put(user);
1060 } else {
1061 if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
1062 return -EACCES;
1063
1064 call = addr->fsa_ax25.sax25_call;
1da177e4
LT		 1065 }
1066
1067 lock_sock(sk);
1068
3200392b 1069 ax25 = sk_to_ax25(sk);
1da177e4
LT		 1070 if (!sock_flag(sk, SOCK_ZAPPED)) {
1071 err = -EINVAL;
1072 goto out;
1073 }
1074
01d7dd0e 1075 ax25->source_addr = call;
1da177e4
LT		 1076
1077 /*
1078 * User already set interface with SO_BINDTODEVICE
1079 */
1080 if (ax25->ax25_dev != NULL)
1081 goto done;
1082
1083 if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
1084 if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
1085 (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
1086 err = -EADDRNOTAVAIL;
1087 goto out;
1088 }
1089 } else {
1090 if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
1091 err = -EADDRNOTAVAIL;
1092 goto out;
1093 }
1094 }
1095
1096 if (ax25_dev != NULL)
1097 ax25_fillin_cb(ax25, ax25_dev);
1098
1099done:
1100 ax25_cb_add(ax25);
1101 sock_reset_flag(sk, SOCK_ZAPPED);
1102
1103out:
1104 release_sock(sk);
1105
49339cca 1106 return err;
1da177e4
LT		 1107}
1108
1109/*
1110 * FIXME: nonblock behaviour looks like it may have a bug.
1111 */
c9266b99
RB		 1112static int __must_check ax25_connect(struct socket *sock,
1113 struct sockaddr *uaddr, int addr_len, int flags)
1da177e4
LT		 1114{
1115 struct sock *sk = sock->sk;
3200392b 1116 ax25_cb *ax25 = sk_to_ax25(sk), *ax25t;
1da177e4
LT		 1117 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1118 ax25_digi *digi = NULL;
1119 int ct = 0, err = 0;
1120
1121 /*
1122 * some sanity checks. code further down depends on this
1123 */
1124
27d1cba2 1125 if (addr_len == sizeof(struct sockaddr_ax25))
1126 /* support for this will go away in early 2.5.x
1127 * ax25_connect(): uses obsolete socket structure
1128 */
1129 ;
1130 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1131 /* support for old structure may go away some time
1132 * ax25_connect(): uses old (6 digipeater) socket structure.
1133 */
1da177e4 1134 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
27d1cba2 1135 (addr_len > sizeof(struct full_sockaddr_ax25)))
1da177e4 1136 return -EINVAL;
1da177e4 1137
1da177e4
LT		 1138
1139 if (fsa->fsa_ax25.sax25_family != AF_AX25)
1140 return -EINVAL;
1141
1142 lock_sock(sk);
1143
1144 /* deal with restarts */
1145 if (sock->state == SS_CONNECTING) {
1146 switch (sk->sk_state) {
1147 case TCP_SYN_SENT: /* still trying */
1148 err = -EINPROGRESS;
75606dc6 1149 goto out_release;
1da177e4
LT		 1150
1151 case TCP_ESTABLISHED: /* connection established */
1152 sock->state = SS_CONNECTED;
75606dc6 1153 goto out_release;
1da177e4
LT		 1154
1155 case TCP_CLOSE: /* connection refused */
1156 sock->state = SS_UNCONNECTED;
1157 err = -ECONNREFUSED;
75606dc6 1158 goto out_release;
1da177e4
LT		 1159 }
1160 }
1161
1162 if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
1163 err = -EISCONN; /* No reconnect on a seqpacket socket */
75606dc6 1164 goto out_release;
1da177e4
LT		 1165 }
1166
1167 sk->sk_state = TCP_CLOSE;
1168 sock->state = SS_UNCONNECTED;
1169
a51482bd
JJ		 1170 kfree(ax25->digipeat);
1171 ax25->digipeat = NULL;
1da177e4
LT		 1172
1173 /*
1174 * Handle digi-peaters to be used.
1175 */
1176 if (addr_len > sizeof(struct sockaddr_ax25) &&
1177 fsa->fsa_ax25.sax25_ndigis != 0) {
1178 /* Valid number of digipeaters ? */
1179 if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) {
1180 err = -EINVAL;
75606dc6 1181 goto out_release;
1da177e4
LT		 1182 }
1183
1184 if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
1185 err = -ENOBUFS;
75606dc6 1186 goto out_release;
1da177e4
LT		 1187 }
1188
1189 digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
1190 digi->lastrepeat = -1;
1191
1192 while (ct < fsa->fsa_ax25.sax25_ndigis) {
1193 if ((fsa->fsa_digipeater[ct].ax25_call[6] &
1194 AX25_HBIT) && ax25->iamdigi) {
1195 digi->repeated[ct] = 1;
1196 digi->lastrepeat = ct;
1197 } else {
1198 digi->repeated[ct] = 0;
1199 }
1200 digi->calls[ct] = fsa->fsa_digipeater[ct];
1201 ct++;
1202 }
1203 }
1204
1205 /*
1206 * Must bind first - autobinding in this may or may not work. If
1207 * the socket is already bound, check to see if the device has
1208 * been filled in, error if it hasn't.
1209 */
1210 if (sock_flag(sk, SOCK_ZAPPED)) {
1211 /* check if we can remove this feature. It is broken. */
1212 printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n",
1213 current->comm);
1214 if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) {
1215 kfree(digi);
75606dc6 1216 goto out_release;
1da177e4
LT		 1217 }
1218
1219 ax25_fillin_cb(ax25, ax25->ax25_dev);
1220 ax25_cb_add(ax25);
1221 } else {
1222 if (ax25->ax25_dev == NULL) {
1223 kfree(digi);
1224 err = -EHOSTUNREACH;
75606dc6 1225 goto out_release;
1da177e4
LT		 1226 }
1227 }
1228
1229 if (sk->sk_type == SOCK_SEQPACKET &&
1230 (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
528930b9 1231 ax25->ax25_dev->dev))) {
1da177e4
LT		 1232 kfree(digi);
1233 err = -EADDRINUSE; /* Already such a connection */
1234 ax25_cb_put(ax25t);
75606dc6 1235 goto out_release;
1da177e4
LT		 1236 }
1237
1238 ax25->dest_addr = fsa->fsa_ax25.sax25_call;
1239 ax25->digipeat = digi;
1240
1241 /* First the easy one */
1242 if (sk->sk_type != SOCK_SEQPACKET) {
1243 sock->state = SS_CONNECTED;
1244 sk->sk_state = TCP_ESTABLISHED;
75606dc6 1245 goto out_release;
1da177e4
LT		 1246 }
1247
1248 /* Move to connecting socket, ax.25 lapb WAIT_UA.. */
1249 sock->state = SS_CONNECTING;
1250 sk->sk_state = TCP_SYN_SENT;
1251
1252 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1253 case AX25_PROTO_STD_SIMPLEX:
1254 case AX25_PROTO_STD_DUPLEX:
1255 ax25_std_establish_data_link(ax25);
1256 break;
1257
1258#ifdef CONFIG_AX25_DAMA_SLAVE
1259 case AX25_PROTO_DAMA_SLAVE:
1260 ax25->modulus = AX25_MODULUS;
1261 ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
1262 if (ax25->ax25_dev->dama.slave)
1263 ax25_ds_establish_data_link(ax25);
1264 else
1265 ax25_std_establish_data_link(ax25);
1266 break;
1267#endif
1268 }
1269
1270 ax25->state = AX25_STATE_1;
1271
1272 ax25_start_heartbeat(ax25);
1273
1274 /* Now the loop */
1275 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
1276 err = -EINPROGRESS;
75606dc6 1277 goto out_release;
1da177e4
LT		 1278 }
1279
1280 if (sk->sk_state == TCP_SYN_SENT) {
75606dc6 1281 DEFINE_WAIT(wait);
1da177e4 1282
1da177e4 1283 for (;;) {
aa395145 1284 prepare_to_wait(sk_sleep(sk), &wait,
bd3b071b 1285 TASK_INTERRUPTIBLE);
1da177e4
LT		 1286 if (sk->sk_state != TCP_SYN_SENT)
1287 break;
75606dc6
RB		 1288 if (!signal_pending(current)) {
1289 release_sock(sk);
1da177e4
LT		 1290 schedule();
1291 lock_sock(sk);
1292 continue;
1293 }
75606dc6
RB		 1294 err = -ERESTARTSYS;
1295 break;
1da177e4 1296 }
aa395145 1297 finish_wait(sk_sleep(sk), &wait);
75606dc6
RB		 1298
1299 if (err)
1300 goto out_release;
1da177e4
LT		 1301 }
1302
1303 if (sk->sk_state != TCP_ESTABLISHED) {
1304 /* Not in ABM, not in WAIT_UA -> failed */
1305 sock->state = SS_UNCONNECTED;
1306 err = sock_error(sk); /* Always set at this point */
75606dc6 1307 goto out_release;
1da177e4
LT		 1308 }
1309
1310 sock->state = SS_CONNECTED;
1311
75606dc6
RB		 1312 err = 0;
1313out_release:
1da177e4
LT		 1314 release_sock(sk);
1315
1316 return err;
1317}
1318
1da177e4
LT		 1319static int ax25_accept(struct socket *sock, struct socket *newsock, int flags)
1320{
1da177e4
LT		 1321 struct sk_buff *skb;
1322 struct sock *newsk;
75606dc6 1323 DEFINE_WAIT(wait);
1da177e4
LT		 1324 struct sock *sk;
1325 int err = 0;
1326
1327 if (sock->state != SS_UNCONNECTED)
1328 return -EINVAL;
1329
1330 if ((sk = sock->sk) == NULL)
1331 return -EINVAL;
1332
1333 lock_sock(sk);
1334 if (sk->sk_type != SOCK_SEQPACKET) {
1335 err = -EOPNOTSUPP;
1336 goto out;
1337 }
1338
1339 if (sk->sk_state != TCP_LISTEN) {
1340 err = -EINVAL;
1341 goto out;
1342 }
1343
1344 /*
1345 * The read queue this time is holding sockets ready to use
1346 * hooked into the SABM we saved
1347 */
1da177e4 1348 for (;;) {
aa395145 1349 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1da177e4
LT		 1350 skb = skb_dequeue(&sk->sk_receive_queue);
1351 if (skb)
1352 break;
1353
1da177e4 1354 if (flags & O_NONBLOCK) {
75606dc6
RB		 1355 err = -EWOULDBLOCK;
1356 break;
1da177e4 1357 }
75606dc6
RB		 1358 if (!signal_pending(current)) {
1359 release_sock(sk);
1da177e4
LT		 1360 schedule();
1361 lock_sock(sk);
1362 continue;
1363 }
75606dc6
RB		 1364 err = -ERESTARTSYS;
1365 break;
1da177e4 1366 }
aa395145 1367 finish_wait(sk_sleep(sk), &wait);
75606dc6
RB		 1368
1369 if (err)
1370 goto out;
1da177e4
LT		 1371
1372 newsk = skb->sk;
9375cb8a 1373 sock_graft(newsk, newsock);
1da177e4
LT		 1374
1375 /* Now attach up the new socket */
1376 kfree_skb(skb);
1377 sk->sk_ack_backlog--;
1da177e4
LT		 1378 newsock->state = SS_CONNECTED;
1379
1380out:
1381 release_sock(sk);
1382
1383 return err;
1384}
1385
1386static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
1387 int *uaddr_len, int peer)
1388{
1389 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1390 struct sock *sk = sock->sk;
1391 unsigned char ndigi, i;
1392 ax25_cb *ax25;
1393 int err = 0;
1394
5b919f83 1395 memset(fsa, 0, sizeof(*fsa));
1da177e4 1396 lock_sock(sk);
3200392b 1397 ax25 = sk_to_ax25(sk);
1da177e4
LT		 1398
1399 if (peer != 0) {
1400 if (sk->sk_state != TCP_ESTABLISHED) {
1401 err = -ENOTCONN;
1402 goto out;
1403 }
1404
1405 fsa->fsa_ax25.sax25_family = AF_AX25;
1406 fsa->fsa_ax25.sax25_call = ax25->dest_addr;
1da177e4
LT		 1407
1408 if (ax25->digipeat != NULL) {
1409 ndigi = ax25->digipeat->ndigi;
1410 fsa->fsa_ax25.sax25_ndigis = ndigi;
1411 for (i = 0; i < ndigi; i++)
1412 fsa->fsa_digipeater[i] =
1413 ax25->digipeat->calls[i];
1414 }
1415 } else {
1416 fsa->fsa_ax25.sax25_family = AF_AX25;
1417 fsa->fsa_ax25.sax25_call = ax25->source_addr;
1418 fsa->fsa_ax25.sax25_ndigis = 1;
1419 if (ax25->ax25_dev != NULL) {
1420 memcpy(&fsa->fsa_digipeater[0],
1421 ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
1422 } else {
1423 fsa->fsa_digipeater[0] = null_ax25_address;
1424 }
1425 }
1426 *uaddr_len = sizeof (struct full_sockaddr_ax25);
1427
1428out:
1429 release_sock(sk);
1430
1431 return err;
1432}
1433
1b784140 1434static int ax25_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1da177e4 1435{
342dfc30 1436 DECLARE_SOCKADDR(struct sockaddr_ax25 *, usax, msg->msg_name);
1da177e4
LT		 1437 struct sock *sk = sock->sk;
1438 struct sockaddr_ax25 sax;
1439 struct sk_buff *skb;
1440 ax25_digi dtmp, *dp;
1da177e4
LT		 1441 ax25_cb *ax25;
1442 size_t size;
1443 int lv, err, addr_len = msg->msg_namelen;
1444
1445 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1446 return -EINVAL;
1447
1448 lock_sock(sk);
3200392b 1449 ax25 = sk_to_ax25(sk);
1da177e4
LT		 1450
1451 if (sock_flag(sk, SOCK_ZAPPED)) {
1452 err = -EADDRNOTAVAIL;
1453 goto out;
1454 }
1455
1456 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1457 send_sig(SIGPIPE, current, 0);
1458 err = -EPIPE;
1459 goto out;
1460 }
1461
1462 if (ax25->ax25_dev == NULL) {
1463 err = -ENETUNREACH;
1464 goto out;
1465 }
1466
1467 if (len > ax25->ax25_dev->dev->mtu) {
1468 err = -EMSGSIZE;
1469 goto out;
1470 }
528930b9 1471
1da177e4
LT		 1472 if (usax != NULL) {
1473 if (usax->sax25_family != AF_AX25) {
1474 err = -EINVAL;
1475 goto out;
1476 }
1477
27d1cba2 1478 if (addr_len == sizeof(struct sockaddr_ax25))
1479 /* ax25_sendmsg(): uses obsolete socket structure */
1480 ;
1481 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1482 /* support for old structure may go away some time
1483 * ax25_sendmsg(): uses old (6 digipeater)
1484 * socket structure.
1485 */
1da177e4 1486 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
528930b9
YH		 1487 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1488 err = -EINVAL;
1da177e4
LT		 1489 goto out;
1490 }
1491
1da177e4
LT		 1492
1493 if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
1494 int ct = 0;
1495 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
1496
1497 /* Valid number of digipeaters ? */
1498 if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) {
1499 err = -EINVAL;
1500 goto out;
1501 }
1502
1503 dtmp.ndigi = usax->sax25_ndigis;
1504
1505 while (ct < usax->sax25_ndigis) {
1506 dtmp.repeated[ct] = 0;
1507 dtmp.calls[ct] = fsa->fsa_digipeater[ct];
1508 ct++;
1509 }
1510
1511 dtmp.lastrepeat = 0;
1512 }
1513
1514 sax = *usax;
1515 if (sk->sk_type == SOCK_SEQPACKET &&
1516 ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
1517 err = -EISCONN;
1518 goto out;
1519 }
1520 if (usax->sax25_ndigis == 0)
1521 dp = NULL;
1522 else
1523 dp = &dtmp;
1524 } else {
1525 /*
1526 * FIXME: 1003.1g - if the socket is like this because
1527 * it has become closed (not started closed) and is VC
1528 * we ought to SIGPIPE, EPIPE
1529 */
1530 if (sk->sk_state != TCP_ESTABLISHED) {
1531 err = -ENOTCONN;
1532 goto out;
1533 }
1534 sax.sax25_family = AF_AX25;
1535 sax.sax25_call = ax25->dest_addr;
1536 dp = ax25->digipeat;
1537 }
1538
1da177e4 1539 /* Build a packet */
1da177e4
LT		 1540 /* Assume the worst case */
1541 size = len + ax25->ax25_dev->dev->hard_header_len;
1542
1543 skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
1544 if (skb == NULL)
1545 goto out;
1546
1547 skb_reserve(skb, size - len);
1548
1da177e4 1549 /* User data follows immediately after the AX.25 data */
6ce8e9ce 1550 if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
1da177e4
LT		 1551 err = -EFAULT;
1552 kfree_skb(skb);
1553 goto out;
1554 }
1555
c1d2bbe1 1556 skb_reset_network_header(skb);
1da177e4
LT		 1557
1558 /* Add the PID if one is not supplied by the user in the skb */
967b05f6
ACM		 1559 if (!ax25->pidincl)
1560 *skb_push(skb, 1) = sk->sk_protocol;
1da177e4 1561
1da177e4
LT		 1562 if (sk->sk_type == SOCK_SEQPACKET) {
1563 /* Connected mode sockets go via the LAPB machine */
1564 if (sk->sk_state != TCP_ESTABLISHED) {
1565 kfree_skb(skb);
1566 err = -ENOTCONN;
1567 goto out;
1568 }
1569
1570 /* Shove it onto the queue and kick */
1571 ax25_output(ax25, ax25->paclen, skb);
1572
1573 err = len;
1574 goto out;
1575 }
1576
967b05f6 1577 skb_push(skb, 1 + ax25_addr_size(dp));
1da177e4 1578
8849b720 1579 /* Building AX.25 Header */
1da177e4
LT		 1580
1581 /* Build an AX.25 header */
967b05f6
ACM		 1582 lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
1583 dp, AX25_COMMAND, AX25_MODULUS);
1da177e4 1584
967b05f6 1585 skb_set_transport_header(skb, lv);
1da177e4 1586
9c70220b 1587 *skb_transport_header(skb) = AX25_UI;
1da177e4
LT		 1588
1589 /* Datagram frames go straight out of the door as UI */
29c4be51 1590 ax25_queue_xmit(skb, ax25->ax25_dev->dev);
1da177e4
LT		 1591
1592 err = len;
1593
1594out:
1595 release_sock(sk);
1596
1597 return err;
1598}
1599
1b784140
YX		 1600static int ax25_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1601 int flags)
1da177e4
LT		 1602{
1603 struct sock *sk = sock->sk;
1604 struct sk_buff *skb;
1605 int copied;
1606 int err = 0;
1607
1608 lock_sock(sk);
1609 /*
1610 * This works for seqpacket too. The receiver has ordered the
1611 * queue for us! We do one quick check first though
1612 */
1613 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
1614 err = -ENOTCONN;
1615 goto out;
1616 }
1617
1618 /* Now we can treat all alike */
1619 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
528930b9 1620 flags & MSG_DONTWAIT, &err);
1da177e4
LT		 1621 if (skb == NULL)
1622 goto out;
1623
3200392b 1624 if (!sk_to_ax25(sk)->pidincl)
1da177e4
LT		 1625 skb_pull(skb, 1); /* Remove PID */
1626
badff6d0
ACM		 1627 skb_reset_transport_header(skb);
1628 copied = skb->len;
1da177e4
LT		 1629
1630 if (copied > size) {
1631 copied = size;
1632 msg->msg_flags |= MSG_TRUNC;
1633 }
1634
51f3d02b 1635 skb_copy_datagram_msg(skb, 0, msg, copied);
1da177e4 1636
f3d33426 1637 if (msg->msg_name) {
1da177e4
LT		 1638 ax25_digi digi;
1639 ax25_address src;
98e399f8 1640 const unsigned char *mac = skb_mac_header(skb);
342dfc30 1641 DECLARE_SOCKADDR(struct sockaddr_ax25 *, sax, msg->msg_name);
1da177e4 1642
ef3313e8 1643 memset(sax, 0, sizeof(struct full_sockaddr_ax25));
98e399f8
ACM		 1644 ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL,
1645 &digi, NULL, NULL);
1da177e4
LT		 1646 sax->sax25_family = AF_AX25;
1647 /* We set this correctly, even though we may not let the
1648 application know the digi calls further down (because it
1649 did NOT ask to know them). This could get political... **/
1650 sax->sax25_ndigis = digi.ndigi;
1651 sax->sax25_call = src;
1652
1653 if (sax->sax25_ndigis != 0) {
1654 int ct;
1655 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
1656
1657 for (ct = 0; ct < digi.ndigi; ct++)
1658 fsa->fsa_digipeater[ct] = digi.calls[ct];
1659 }
1660 msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
1661 }
1662
1663 skb_free_datagram(sk, skb);
1664 err = copied;
1665
1666out:
1667 release_sock(sk);
1668
1669 return err;
1670}
1671
1672static int ax25_shutdown(struct socket *sk, int how)
1673{
1674 /* FIXME - generate DM and RNR states */
1675 return -EOPNOTSUPP;
1676}
1677
1678static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1679{
1680 struct sock *sk = sock->sk;
1681 void __user *argp = (void __user *)arg;
1682 int res = 0;
1683
1684 lock_sock(sk);
1685 switch (cmd) {
1686 case TIOCOUTQ: {
1687 long amount;
31e6d363
ED		 1688
1689 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1da177e4
LT		 1690 if (amount < 0)
1691 amount = 0;
1692 res = put_user(amount, (int __user *)argp);
1693 break;
1694 }
1695
1696 case TIOCINQ: {
1697 struct sk_buff *skb;
1698 long amount = 0L;
1699 /* These two are safe on a single CPU system as only user tasks fiddle here */
1700 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1701 amount = skb->len;
20b7d10a 1702 res = put_user(amount, (int __user *) argp);
1da177e4
LT		 1703 break;
1704 }
1705
1706 case SIOCGSTAMP:
9b37ee75 1707 res = sock_get_timestamp(sk, argp);
1da177e4
LT		 1708 break;
1709
ae40eb1e
ED		 1710 case SIOCGSTAMPNS:
1711 res = sock_get_timestampns(sk, argp);
1712 break;
1713
1da177e4
LT		 1714 case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
1715 case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
1716 case SIOCAX25GETUID: {
1717 struct sockaddr_ax25 sax25;
1718 if (copy_from_user(&sax25, argp, sizeof(sax25))) {
1719 res = -EFAULT;
1720 break;
1721 }
1722 res = ax25_uid_ioctl(cmd, &sax25);
1723 break;
1724 }
1725
1726 case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
1727 long amount;
1728 if (!capable(CAP_NET_ADMIN)) {
1729 res = -EPERM;
1730 break;
1731 }
1732 if (get_user(amount, (long __user *)argp)) {
1733 res = -EFAULT;
1734 break;
1735 }
76887753 1736 if (amount < 0 || amount > AX25_NOUID_BLOCK) {
1da177e4
LT		 1737 res = -EINVAL;
1738 break;
1739 }
1740 ax25_uid_policy = amount;
1741 res = 0;
1742 break;
1743 }
1744
1745 case SIOCADDRT:
1746 case SIOCDELRT:
1747 case SIOCAX25OPTRT:
1748 if (!capable(CAP_NET_ADMIN)) {
1749 res = -EPERM;
1750 break;
1751 }
1752 res = ax25_rt_ioctl(cmd, argp);
1753 break;
1754
1755 case SIOCAX25CTLCON:
1756 if (!capable(CAP_NET_ADMIN)) {
1757 res = -EPERM;
1758 break;
1759 }
1760 res = ax25_ctl_ioctl(cmd, argp);
1761 break;
1762
1763 case SIOCAX25GETINFO:
1764 case SIOCAX25GETINFOOLD: {
3200392b 1765 ax25_cb *ax25 = sk_to_ax25(sk);
1da177e4
LT		 1766 struct ax25_info_struct ax25_info;
1767
1768 ax25_info.t1 = ax25->t1 / HZ;
1769 ax25_info.t2 = ax25->t2 / HZ;
1770 ax25_info.t3 = ax25->t3 / HZ;
1771 ax25_info.idle = ax25->idle / (60 * HZ);
1772 ax25_info.n2 = ax25->n2;
1773 ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
1774 ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
1775 ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
1776 ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
1777 ax25_info.n2count = ax25->n2count;
1778 ax25_info.state = ax25->state;
407fc5cf
ED		 1779 ax25_info.rcv_q = sk_rmem_alloc_get(sk);
1780 ax25_info.snd_q = sk_wmem_alloc_get(sk);
1da177e4
LT		 1781 ax25_info.vs = ax25->vs;
1782 ax25_info.vr = ax25->vr;
1783 ax25_info.va = ax25->va;
1784 ax25_info.vs_max = ax25->vs; /* reserved */
1785 ax25_info.paclen = ax25->paclen;
1786 ax25_info.window = ax25->window;
1787
1788 /* old structure? */
1789 if (cmd == SIOCAX25GETINFOOLD) {
1790 static int warned = 0;
1791 if (!warned) {
1792 printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
1793 current->comm);
1794 warned=1;
1795 }
1796
1797 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
1798 res = -EFAULT;
1799 break;
1800 }
1801 } else {
1802 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
1803 res = -EINVAL;
1804 break;
1805 }
1806 }
1807 res = 0;
1808 break;
1809 }
1810
1811 case SIOCAX25ADDFWD:
1812 case SIOCAX25DELFWD: {
1813 struct ax25_fwd_struct ax25_fwd;
1814 if (!capable(CAP_NET_ADMIN)) {
1815 res = -EPERM;
1816 break;
1817 }
1818 if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
1819 res = -EFAULT;
1820 break;
1821 }
1822 res = ax25_fwd_ioctl(cmd, &ax25_fwd);
1823 break;
1824 }
1825
1826 case SIOCGIFADDR:
1827 case SIOCSIFADDR:
1828 case SIOCGIFDSTADDR:
1829 case SIOCSIFDSTADDR:
1830 case SIOCGIFBRDADDR:
1831 case SIOCSIFBRDADDR:
1832 case SIOCGIFNETMASK:
1833 case SIOCSIFNETMASK:
1834 case SIOCGIFMETRIC:
1835 case SIOCSIFMETRIC:
1836 res = -EINVAL;
1837 break;
1838
1839 default:
b5e5fa5e 1840 res = -ENOIOCTLCMD;
1da177e4
LT		 1841 break;
1842 }
1843 release_sock(sk);
1844
1845 return res;
1846}
1847
1848#ifdef CONFIG_PROC_FS
1849
1850static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
f16f3026 1851 __acquires(ax25_list_lock)
1da177e4 1852{
1da177e4 1853 spin_lock_bh(&ax25_list_lock);
b512f3d8 1854 return seq_hlist_start(&ax25_list, *pos);
1da177e4
LT		 1855}
1856
1857static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
1858{
b512f3d8 1859 return seq_hlist_next(v, &ax25_list, pos);
1da177e4 1860}
528930b9 1861
1da177e4 1862static void ax25_info_stop(struct seq_file *seq, void *v)
f16f3026 1863 __releases(ax25_list_lock)
1da177e4
LT		 1864{
1865 spin_unlock_bh(&ax25_list_lock);
1866}
1867
1868static int ax25_info_show(struct seq_file *seq, void *v)
1869{
b512f3d8 1870 ax25_cb *ax25 = hlist_entry(v, struct ax25_cb, ax25_node);
f75268cd 1871 char buf[11];
1da177e4
LT		 1872 int k;
1873
1874
1875 /*
1876 * New format:
1877 * magic dev src_addr dest_addr,digi1,digi2,.. st vs vr va t1 t1 t2 t2 t3 t3 idle idle n2 n2 rtt window paclen Snd-Q Rcv-Q inode
1878 */
1879
1880 seq_printf(seq, "%8.8lx %s %s%s ",
1881 (long) ax25,
1882 ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
f75268cd 1883 ax2asc(buf, &ax25->source_addr),
1da177e4 1884 ax25->iamdigi? "*":"");
f75268cd 1885 seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
1da177e4
LT		 1886
1887 for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
1888 seq_printf(seq, ",%s%s",
f75268cd 1889 ax2asc(buf, &ax25->digipeat->calls[k]),
1da177e4
LT		 1890 ax25->digipeat->repeated[k]? "*":"");
1891 }
1892
1893 seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
1894 ax25->state,
1895 ax25->vs, ax25->vr, ax25->va,
1896 ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
1897 ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
1898 ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
1899 ax25_display_timer(&ax25->idletimer) / (60 * HZ),
1900 ax25->idle / (60 * HZ),
1901 ax25->n2count, ax25->n2,
1902 ax25->rtt / HZ,
1903 ax25->window,
1904 ax25->paclen);
1905
1906 if (ax25->sk != NULL) {
1105b5d1 1907 seq_printf(seq, " %d %d %lu\n",
31e6d363
ED		 1908 sk_wmem_alloc_get(ax25->sk),
1909 sk_rmem_alloc_get(ax25->sk),
1105b5d1 1910 sock_i_ino(ax25->sk));
1da177e4
LT		 1911 } else {
1912 seq_puts(seq, " * * *\n");
1913 }
1914 return 0;
1915}
1916
56b3d975 1917static const struct seq_operations ax25_info_seqops = {
1da177e4
LT		 1918 .start = ax25_info_start,
1919 .next = ax25_info_next,
1920 .stop = ax25_info_stop,
1921 .show = ax25_info_show,
1922};
1923
1924static int ax25_info_open(struct inode *inode, struct file *file)
1925{
1926 return seq_open(file, &ax25_info_seqops);
1927}
1928
9a32144e 1929static const struct file_operations ax25_info_fops = {
1da177e4
LT		 1930 .owner = THIS_MODULE,
1931 .open = ax25_info_open,
1932 .read = seq_read,
1933 .llseek = seq_lseek,
1934 .release = seq_release,
1935};
1936
1937#endif
1938
ec1b4cf7 1939static const struct net_proto_family ax25_family_ops = {
1da177e4
LT		 1940 .family = PF_AX25,
1941 .create = ax25_create,
1942 .owner = THIS_MODULE,
1943};
1944
90ddc4f0 1945static const struct proto_ops ax25_proto_ops = {
4676356b
RB		 1946 .family = PF_AX25,
1947 .owner = THIS_MODULE,
1948 .release = ax25_release,
1949 .bind = ax25_bind,
1950 .connect = ax25_connect,
1951 .socketpair = sock_no_socketpair,
1952 .accept = ax25_accept,
1953 .getname = ax25_getname,
1954 .poll = datagram_poll,
1955 .ioctl = ax25_ioctl,
1956 .listen = ax25_listen,
1957 .shutdown = ax25_shutdown,
1958 .setsockopt = ax25_setsockopt,
1959 .getsockopt = ax25_getsockopt,
1960 .sendmsg = ax25_sendmsg,
1961 .recvmsg = ax25_recvmsg,
1962 .mmap = sock_no_mmap,
1963 .sendpage = sock_no_sendpage,
1da177e4
LT		 1964};
1965
1966/*
1967 * Called by socket.c on kernel start up
1968 */
7546dd97 1969static struct packet_type ax25_packet_type __read_mostly = {
09640e63 1970 .type = cpu_to_be16(ETH_P_AX25),
1da177e4
LT		 1971 .func = ax25_kiss_rcv,
1972};
1973
1974static struct notifier_block ax25_dev_notifier = {
351638e7 1975 .notifier_call = ax25_device_event,
1da177e4
LT		 1976};
1977
1da177e4
LT		 1978static int __init ax25_init(void)
1979{
1980 int rc = proto_register(&ax25_proto, 0);
1981
1982 if (rc != 0)
1983 goto out;
1984
1985 sock_register(&ax25_family_ops);
1986 dev_add_pack(&ax25_packet_type);
1987 register_netdevice_notifier(&ax25_dev_notifier);
1da177e4 1988
d4beaa66
G		 1989 proc_create("ax25_route", S_IRUGO, init_net.proc_net,
1990 &ax25_route_fops);
1991 proc_create("ax25", S_IRUGO, init_net.proc_net, &ax25_info_fops);
1992 proc_create("ax25_calls", S_IRUGO, init_net.proc_net, &ax25_uid_fops);
1da177e4
LT		 1993out:
1994 return rc;
1995}
1996module_init(ax25_init);
1997
1998
1999MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
2000MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
2001MODULE_LICENSE("GPL");
2002MODULE_ALIAS_NETPROTO(PF_AX25);
2003
2004static void __exit ax25_exit(void)
2005{
ece31ffd
G		 2006 remove_proc_entry("ax25_route", init_net.proc_net);
2007 remove_proc_entry("ax25", init_net.proc_net);
2008 remove_proc_entry("ax25_calls", init_net.proc_net);
1da177e4 2009
1da177e4
LT		 2010 unregister_netdevice_notifier(&ax25_dev_notifier);
2011
2012 dev_remove_pack(&ax25_packet_type);
2013
2014 sock_unregister(PF_AX25);
2015 proto_unregister(&ax25_proto);
3adadc08
EB		 2016
2017 ax25_rt_free();
2018 ax25_uid_free();
2019 ax25_dev_free();
1da177e4
LT		 2020}
2021module_exit(ax25_exit);
Linux kernel - Deliverables
This page took 0.837936 seconds and 5 git commands to generate.