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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[linux-2.6-block.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
79462ad0
HFS		 808 if (protocol < 0 || protocol > SK_PROTOCOL_MAX)
809 return -EINVAL;
810
09ad9bc7 811 if (!net_eq(net, &init_net))
1b8d7ae4
EB		 812 return -EAFNOSUPPORT;
813
1da177e4
LT		 814 switch (sock->type) {
815 case SOCK_DGRAM:
816 if (protocol == 0 || protocol == PF_AX25)
817 protocol = AX25_P_TEXT;
818 break;
819
820 case SOCK_SEQPACKET:
821 switch (protocol) {
822 case 0:
823 case PF_AX25: /* For CLX */
824 protocol = AX25_P_TEXT;
825 break;
826 case AX25_P_SEGMENT:
827#ifdef CONFIG_INET
828 case AX25_P_ARP:
829 case AX25_P_IP:
830#endif
831#ifdef CONFIG_NETROM
832 case AX25_P_NETROM:
833#endif
834#ifdef CONFIG_ROSE
835 case AX25_P_ROSE:
836#endif
837 return -ESOCKTNOSUPPORT;
838#ifdef CONFIG_NETROM_MODULE
839 case AX25_P_NETROM:
840 if (ax25_protocol_is_registered(AX25_P_NETROM))
841 return -ESOCKTNOSUPPORT;
ef764a13 842 break;
1da177e4
LT		 843#endif
844#ifdef CONFIG_ROSE_MODULE
845 case AX25_P_ROSE:
846 if (ax25_protocol_is_registered(AX25_P_ROSE))
847 return -ESOCKTNOSUPPORT;
848#endif
849 default:
850 break;
851 }
852 break;
853
854 case SOCK_RAW:
855 break;
856 default:
857 return -ESOCKTNOSUPPORT;
858 }
859
11aa9c28 860 sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto, kern);
6257ff21 861 if (sk == NULL)
1da177e4
LT		 862 return -ENOMEM;
863
3200392b 864 ax25 = ax25_sk(sk)->cb = ax25_create_cb();
1da177e4
LT		 865 if (!ax25) {
866 sk_free(sk);
867 return -ENOMEM;
868 }
869
870 sock_init_data(sock, sk);
871
872 sk->sk_destruct = ax25_free_sock;
873 sock->ops = &ax25_proto_ops;
874 sk->sk_protocol = protocol;
875
876 ax25->sk = sk;
877
878 return 0;
879}
880
881struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
882{
883 struct sock *sk;
884 ax25_cb *ax25, *oax25;
885
11aa9c28 886 sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot, 0);
6257ff21 887 if (sk == NULL)
1da177e4
LT		 888 return NULL;
889
890 if ((ax25 = ax25_create_cb()) == NULL) {
891 sk_free(sk);
892 return NULL;
893 }
894
895 switch (osk->sk_type) {
896 case SOCK_DGRAM:
897 break;
898 case SOCK_SEQPACKET:
899 break;
900 default:
901 sk_free(sk);
902 ax25_cb_put(ax25);
903 return NULL;
904 }
905
906 sock_init_data(NULL, sk);
907
1da177e4 908 sk->sk_type = osk->sk_type;
1da177e4
LT		 909 sk->sk_priority = osk->sk_priority;
910 sk->sk_protocol = osk->sk_protocol;
911 sk->sk_rcvbuf = osk->sk_rcvbuf;
912 sk->sk_sndbuf = osk->sk_sndbuf;
913 sk->sk_state = TCP_ESTABLISHED;
53b924b3 914 sock_copy_flags(sk, osk);
1da177e4 915
3200392b 916 oax25 = sk_to_ax25(osk);
1da177e4
LT		 917
918 ax25->modulus = oax25->modulus;
919 ax25->backoff = oax25->backoff;
920 ax25->pidincl = oax25->pidincl;
921 ax25->iamdigi = oax25->iamdigi;
922 ax25->rtt = oax25->rtt;
923 ax25->t1 = oax25->t1;
924 ax25->t2 = oax25->t2;
925 ax25->t3 = oax25->t3;
926 ax25->n2 = oax25->n2;
927 ax25->idle = oax25->idle;
928 ax25->paclen = oax25->paclen;
929 ax25->window = oax25->window;
930
931 ax25->ax25_dev = ax25_dev;
932 ax25->source_addr = oax25->source_addr;
933
934 if (oax25->digipeat != NULL) {
0459d70a
ACM		 935 ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
936 GFP_ATOMIC);
937 if (ax25->digipeat == NULL) {
1da177e4
LT		 938 sk_free(sk);
939 ax25_cb_put(ax25);
940 return NULL;
941 }
1da177e4
LT		 942 }
943
3200392b 944 ax25_sk(sk)->cb = ax25;
8c185ab6 945 sk->sk_destruct = ax25_free_sock;
1da177e4
LT		 946 ax25->sk = sk;
947
948 return sk;
949}
950
951static int ax25_release(struct socket *sock)
952{
953 struct sock *sk = sock->sk;
954 ax25_cb *ax25;
955
956 if (sk == NULL)
957 return 0;
958
959 sock_hold(sk);
960 sock_orphan(sk);
961 lock_sock(sk);
3200392b 962 ax25 = sk_to_ax25(sk);
1da177e4
LT		 963
964 if (sk->sk_type == SOCK_SEQPACKET) {
965 switch (ax25->state) {
966 case AX25_STATE_0:
967 release_sock(sk);
968 ax25_disconnect(ax25, 0);
969 lock_sock(sk);
970 ax25_destroy_socket(ax25);
971 break;
972
973 case AX25_STATE_1:
974 case AX25_STATE_2:
975 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
976 release_sock(sk);
977 ax25_disconnect(ax25, 0);
978 lock_sock(sk);
979 ax25_destroy_socket(ax25);
980 break;
981
982 case AX25_STATE_3:
983 case AX25_STATE_4:
984 ax25_clear_queues(ax25);
985 ax25->n2count = 0;
986
987 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
988 case AX25_PROTO_STD_SIMPLEX:
989 case AX25_PROTO_STD_DUPLEX:
990 ax25_send_control(ax25,
991 AX25_DISC,
992 AX25_POLLON,
993 AX25_COMMAND);
994 ax25_stop_t2timer(ax25);
995 ax25_stop_t3timer(ax25);
996 ax25_stop_idletimer(ax25);
997 break;
998#ifdef CONFIG_AX25_DAMA_SLAVE
999 case AX25_PROTO_DAMA_SLAVE:
1000 ax25_stop_t3timer(ax25);
1001 ax25_stop_idletimer(ax25);
1002 break;
1003#endif
1004 }
1005 ax25_calculate_t1(ax25);
1006 ax25_start_t1timer(ax25);
1007 ax25->state = AX25_STATE_2;
1008 sk->sk_state = TCP_CLOSE;
1009 sk->sk_shutdown |= SEND_SHUTDOWN;
1010 sk->sk_state_change(sk);
1011 sock_set_flag(sk, SOCK_DESTROY);
1012 break;
1013
1014 default:
1015 break;
1016 }
1017 } else {
1018 sk->sk_state = TCP_CLOSE;
1019 sk->sk_shutdown |= SEND_SHUTDOWN;
1020 sk->sk_state_change(sk);
1021 ax25_destroy_socket(ax25);
1022 }
1023
1024 sock->sk = NULL;
1025 release_sock(sk);
1026 sock_put(sk);
1027
1028 return 0;
1029}
1030
1031/*
1032 * We support a funny extension here so you can (as root) give any callsign
1033 * digipeated via a local address as source. This hack is obsolete now
1034 * that we've implemented support for SO_BINDTODEVICE. It is however small
1035 * and trivially backward compatible.
1036 */
1037static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1038{
1039 struct sock *sk = sock->sk;
1040 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
1041 ax25_dev *ax25_dev = NULL;
01d7dd0e
RB		 1042 ax25_uid_assoc *user;
1043 ax25_address call;
1da177e4
LT		 1044 ax25_cb *ax25;
1045 int err = 0;
1046
1047 if (addr_len != sizeof(struct sockaddr_ax25) &&
1987e7b4 1048 addr_len != sizeof(struct full_sockaddr_ax25))
1049 /* support for old structure may go away some time
1050 * ax25_bind(): uses old (6 digipeater) socket structure.
1051 */
1da177e4 1052 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1987e7b4 1053 (addr_len > sizeof(struct full_sockaddr_ax25)))
1da177e4 1054 return -EINVAL;
1da177e4
LT		 1055
1056 if (addr->fsa_ax25.sax25_family != AF_AX25)
1057 return -EINVAL;
1058
73400407 1059 user = ax25_findbyuid(current_euid());
01d7dd0e
RB		 1060 if (user) {
1061 call = user->call;
1062 ax25_uid_put(user);
1063 } else {
1064 if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
1065 return -EACCES;
1066
1067 call = addr->fsa_ax25.sax25_call;
1da177e4
LT		 1068 }
1069
1070 lock_sock(sk);
1071
3200392b 1072 ax25 = sk_to_ax25(sk);
1da177e4
LT		 1073 if (!sock_flag(sk, SOCK_ZAPPED)) {
1074 err = -EINVAL;
1075 goto out;
1076 }
1077
01d7dd0e 1078 ax25->source_addr = call;
1da177e4
LT		 1079
1080 /*
1081 * User already set interface with SO_BINDTODEVICE
1082 */
1083 if (ax25->ax25_dev != NULL)
1084 goto done;
1085
1086 if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
1087 if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
1088 (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
1089 err = -EADDRNOTAVAIL;
1090 goto out;
1091 }
1092 } else {
1093 if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
1094 err = -EADDRNOTAVAIL;
1095 goto out;
1096 }
1097 }
1098
1099 if (ax25_dev != NULL)
1100 ax25_fillin_cb(ax25, ax25_dev);
1101
1102done:
1103 ax25_cb_add(ax25);
1104 sock_reset_flag(sk, SOCK_ZAPPED);
1105
1106out:
1107 release_sock(sk);
1108
49339cca 1109 return err;
1da177e4
LT		 1110}
1111
1112/*
1113 * FIXME: nonblock behaviour looks like it may have a bug.
1114 */
c9266b99
RB		 1115static int __must_check ax25_connect(struct socket *sock,
1116 struct sockaddr *uaddr, int addr_len, int flags)
1da177e4
LT		 1117{
1118 struct sock *sk = sock->sk;
3200392b 1119 ax25_cb *ax25 = sk_to_ax25(sk), *ax25t;
1da177e4
LT		 1120 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1121 ax25_digi *digi = NULL;
1122 int ct = 0, err = 0;
1123
1124 /*
1125 * some sanity checks. code further down depends on this
1126 */
1127
27d1cba2 1128 if (addr_len == sizeof(struct sockaddr_ax25))
1129 /* support for this will go away in early 2.5.x
1130 * ax25_connect(): uses obsolete socket structure
1131 */
1132 ;
1133 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1134 /* support for old structure may go away some time
1135 * ax25_connect(): uses old (6 digipeater) socket structure.
1136 */
1da177e4 1137 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
27d1cba2 1138 (addr_len > sizeof(struct full_sockaddr_ax25)))
1da177e4 1139 return -EINVAL;
1da177e4 1140
1da177e4
LT		 1141
1142 if (fsa->fsa_ax25.sax25_family != AF_AX25)
1143 return -EINVAL;
1144
1145 lock_sock(sk);
1146
1147 /* deal with restarts */
1148 if (sock->state == SS_CONNECTING) {
1149 switch (sk->sk_state) {
1150 case TCP_SYN_SENT: /* still trying */
1151 err = -EINPROGRESS;
75606dc6 1152 goto out_release;
1da177e4
LT		 1153
1154 case TCP_ESTABLISHED: /* connection established */
1155 sock->state = SS_CONNECTED;
75606dc6 1156 goto out_release;
1da177e4
LT		 1157
1158 case TCP_CLOSE: /* connection refused */
1159 sock->state = SS_UNCONNECTED;
1160 err = -ECONNREFUSED;
75606dc6 1161 goto out_release;
1da177e4
LT		 1162 }
1163 }
1164
1165 if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
1166 err = -EISCONN; /* No reconnect on a seqpacket socket */
75606dc6 1167 goto out_release;
1da177e4
LT		 1168 }
1169
1170 sk->sk_state = TCP_CLOSE;
1171 sock->state = SS_UNCONNECTED;
1172
a51482bd
JJ		 1173 kfree(ax25->digipeat);
1174 ax25->digipeat = NULL;
1da177e4
LT		 1175
1176 /*
1177 * Handle digi-peaters to be used.
1178 */
1179 if (addr_len > sizeof(struct sockaddr_ax25) &&
1180 fsa->fsa_ax25.sax25_ndigis != 0) {
1181 /* Valid number of digipeaters ? */
1182 if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) {
1183 err = -EINVAL;
75606dc6 1184 goto out_release;
1da177e4
LT		 1185 }
1186
1187 if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
1188 err = -ENOBUFS;
75606dc6 1189 goto out_release;
1da177e4
LT		 1190 }
1191
1192 digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
1193 digi->lastrepeat = -1;
1194
1195 while (ct < fsa->fsa_ax25.sax25_ndigis) {
1196 if ((fsa->fsa_digipeater[ct].ax25_call[6] &
1197 AX25_HBIT) && ax25->iamdigi) {
1198 digi->repeated[ct] = 1;
1199 digi->lastrepeat = ct;
1200 } else {
1201 digi->repeated[ct] = 0;
1202 }
1203 digi->calls[ct] = fsa->fsa_digipeater[ct];
1204 ct++;
1205 }
1206 }
1207
1208 /*
1209 * Must bind first - autobinding in this may or may not work. If
1210 * the socket is already bound, check to see if the device has
1211 * been filled in, error if it hasn't.
1212 */
1213 if (sock_flag(sk, SOCK_ZAPPED)) {
1214 /* check if we can remove this feature. It is broken. */
1215 printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n",
1216 current->comm);
1217 if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) {
1218 kfree(digi);
75606dc6 1219 goto out_release;
1da177e4
LT		 1220 }
1221
1222 ax25_fillin_cb(ax25, ax25->ax25_dev);
1223 ax25_cb_add(ax25);
1224 } else {
1225 if (ax25->ax25_dev == NULL) {
1226 kfree(digi);
1227 err = -EHOSTUNREACH;
75606dc6 1228 goto out_release;
1da177e4
LT		 1229 }
1230 }
1231
1232 if (sk->sk_type == SOCK_SEQPACKET &&
1233 (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
528930b9 1234 ax25->ax25_dev->dev))) {
1da177e4
LT		 1235 kfree(digi);
1236 err = -EADDRINUSE; /* Already such a connection */
1237 ax25_cb_put(ax25t);
75606dc6 1238 goto out_release;
1da177e4
LT		 1239 }
1240
1241 ax25->dest_addr = fsa->fsa_ax25.sax25_call;
1242 ax25->digipeat = digi;
1243
1244 /* First the easy one */
1245 if (sk->sk_type != SOCK_SEQPACKET) {
1246 sock->state = SS_CONNECTED;
1247 sk->sk_state = TCP_ESTABLISHED;
75606dc6 1248 goto out_release;
1da177e4
LT		 1249 }
1250
1251 /* Move to connecting socket, ax.25 lapb WAIT_UA.. */
1252 sock->state = SS_CONNECTING;
1253 sk->sk_state = TCP_SYN_SENT;
1254
1255 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1256 case AX25_PROTO_STD_SIMPLEX:
1257 case AX25_PROTO_STD_DUPLEX:
1258 ax25_std_establish_data_link(ax25);
1259 break;
1260
1261#ifdef CONFIG_AX25_DAMA_SLAVE
1262 case AX25_PROTO_DAMA_SLAVE:
1263 ax25->modulus = AX25_MODULUS;
1264 ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
1265 if (ax25->ax25_dev->dama.slave)
1266 ax25_ds_establish_data_link(ax25);
1267 else
1268 ax25_std_establish_data_link(ax25);
1269 break;
1270#endif
1271 }
1272
1273 ax25->state = AX25_STATE_1;
1274
1275 ax25_start_heartbeat(ax25);
1276
1277 /* Now the loop */
1278 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
1279 err = -EINPROGRESS;
75606dc6 1280 goto out_release;
1da177e4
LT		 1281 }
1282
1283 if (sk->sk_state == TCP_SYN_SENT) {
75606dc6 1284 DEFINE_WAIT(wait);
1da177e4 1285
1da177e4 1286 for (;;) {
aa395145 1287 prepare_to_wait(sk_sleep(sk), &wait,
bd3b071b 1288 TASK_INTERRUPTIBLE);
1da177e4
LT		 1289 if (sk->sk_state != TCP_SYN_SENT)
1290 break;
75606dc6
RB		 1291 if (!signal_pending(current)) {
1292 release_sock(sk);
1da177e4
LT		 1293 schedule();
1294 lock_sock(sk);
1295 continue;
1296 }
75606dc6
RB		 1297 err = -ERESTARTSYS;
1298 break;
1da177e4 1299 }
aa395145 1300 finish_wait(sk_sleep(sk), &wait);
75606dc6
RB		 1301
1302 if (err)
1303 goto out_release;
1da177e4
LT		 1304 }
1305
1306 if (sk->sk_state != TCP_ESTABLISHED) {
1307 /* Not in ABM, not in WAIT_UA -> failed */
1308 sock->state = SS_UNCONNECTED;
1309 err = sock_error(sk); /* Always set at this point */
75606dc6 1310 goto out_release;
1da177e4
LT		 1311 }
1312
1313 sock->state = SS_CONNECTED;
1314
75606dc6
RB		 1315 err = 0;
1316out_release:
1da177e4
LT		 1317 release_sock(sk);
1318
1319 return err;
1320}
1321
1da177e4
LT		 1322static int ax25_accept(struct socket *sock, struct socket *newsock, int flags)
1323{
1da177e4
LT		 1324 struct sk_buff *skb;
1325 struct sock *newsk;
75606dc6 1326 DEFINE_WAIT(wait);
1da177e4
LT		 1327 struct sock *sk;
1328 int err = 0;
1329
1330 if (sock->state != SS_UNCONNECTED)
1331 return -EINVAL;
1332
1333 if ((sk = sock->sk) == NULL)
1334 return -EINVAL;
1335
1336 lock_sock(sk);
1337 if (sk->sk_type != SOCK_SEQPACKET) {
1338 err = -EOPNOTSUPP;
1339 goto out;
1340 }
1341
1342 if (sk->sk_state != TCP_LISTEN) {
1343 err = -EINVAL;
1344 goto out;
1345 }
1346
1347 /*
1348 * The read queue this time is holding sockets ready to use
1349 * hooked into the SABM we saved
1350 */
1da177e4 1351 for (;;) {
aa395145 1352 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1da177e4
LT		 1353 skb = skb_dequeue(&sk->sk_receive_queue);
1354 if (skb)
1355 break;
1356
1da177e4 1357 if (flags & O_NONBLOCK) {
75606dc6
RB		 1358 err = -EWOULDBLOCK;
1359 break;
1da177e4 1360 }
75606dc6
RB		 1361 if (!signal_pending(current)) {
1362 release_sock(sk);
1da177e4
LT		 1363 schedule();
1364 lock_sock(sk);
1365 continue;
1366 }
75606dc6
RB		 1367 err = -ERESTARTSYS;
1368 break;
1da177e4 1369 }
aa395145 1370 finish_wait(sk_sleep(sk), &wait);
75606dc6
RB		 1371
1372 if (err)
1373 goto out;
1da177e4
LT		 1374
1375 newsk = skb->sk;
9375cb8a 1376 sock_graft(newsk, newsock);
1da177e4
LT		 1377
1378 /* Now attach up the new socket */
1379 kfree_skb(skb);
1380 sk->sk_ack_backlog--;
1da177e4
LT		 1381 newsock->state = SS_CONNECTED;
1382
1383out:
1384 release_sock(sk);
1385
1386 return err;
1387}
1388
1389static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
1390 int *uaddr_len, int peer)
1391{
1392 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1393 struct sock *sk = sock->sk;
1394 unsigned char ndigi, i;
1395 ax25_cb *ax25;
1396 int err = 0;
1397
5b919f83 1398 memset(fsa, 0, sizeof(*fsa));
1da177e4 1399 lock_sock(sk);
3200392b 1400 ax25 = sk_to_ax25(sk);
1da177e4
LT		 1401
1402 if (peer != 0) {
1403 if (sk->sk_state != TCP_ESTABLISHED) {
1404 err = -ENOTCONN;
1405 goto out;
1406 }
1407
1408 fsa->fsa_ax25.sax25_family = AF_AX25;
1409 fsa->fsa_ax25.sax25_call = ax25->dest_addr;
1da177e4
LT		 1410
1411 if (ax25->digipeat != NULL) {
1412 ndigi = ax25->digipeat->ndigi;
1413 fsa->fsa_ax25.sax25_ndigis = ndigi;
1414 for (i = 0; i < ndigi; i++)
1415 fsa->fsa_digipeater[i] =
1416 ax25->digipeat->calls[i];
1417 }
1418 } else {
1419 fsa->fsa_ax25.sax25_family = AF_AX25;
1420 fsa->fsa_ax25.sax25_call = ax25->source_addr;
1421 fsa->fsa_ax25.sax25_ndigis = 1;
1422 if (ax25->ax25_dev != NULL) {
1423 memcpy(&fsa->fsa_digipeater[0],
1424 ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
1425 } else {
1426 fsa->fsa_digipeater[0] = null_ax25_address;
1427 }
1428 }
1429 *uaddr_len = sizeof (struct full_sockaddr_ax25);
1430
1431out:
1432 release_sock(sk);
1433
1434 return err;
1435}
1436
1b784140 1437static int ax25_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1da177e4 1438{
342dfc30 1439 DECLARE_SOCKADDR(struct sockaddr_ax25 *, usax, msg->msg_name);
1da177e4
LT		 1440 struct sock *sk = sock->sk;
1441 struct sockaddr_ax25 sax;
1442 struct sk_buff *skb;
1443 ax25_digi dtmp, *dp;
1da177e4
LT		 1444 ax25_cb *ax25;
1445 size_t size;
1446 int lv, err, addr_len = msg->msg_namelen;
1447
1448 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1449 return -EINVAL;
1450
1451 lock_sock(sk);
3200392b 1452 ax25 = sk_to_ax25(sk);
1da177e4
LT		 1453
1454 if (sock_flag(sk, SOCK_ZAPPED)) {
1455 err = -EADDRNOTAVAIL;
1456 goto out;
1457 }
1458
1459 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1460 send_sig(SIGPIPE, current, 0);
1461 err = -EPIPE;
1462 goto out;
1463 }
1464
1465 if (ax25->ax25_dev == NULL) {
1466 err = -ENETUNREACH;
1467 goto out;
1468 }
1469
1470 if (len > ax25->ax25_dev->dev->mtu) {
1471 err = -EMSGSIZE;
1472 goto out;
1473 }
528930b9 1474
1da177e4
LT		 1475 if (usax != NULL) {
1476 if (usax->sax25_family != AF_AX25) {
1477 err = -EINVAL;
1478 goto out;
1479 }
1480
27d1cba2 1481 if (addr_len == sizeof(struct sockaddr_ax25))
1482 /* ax25_sendmsg(): uses obsolete socket structure */
1483 ;
1484 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1485 /* support for old structure may go away some time
1486 * ax25_sendmsg(): uses old (6 digipeater)
1487 * socket structure.
1488 */
1da177e4 1489 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
528930b9
YH		 1490 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1491 err = -EINVAL;
1da177e4
LT		 1492 goto out;
1493 }
1494
1da177e4
LT		 1495
1496 if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
1497 int ct = 0;
1498 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
1499
1500 /* Valid number of digipeaters ? */
1501 if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) {
1502 err = -EINVAL;
1503 goto out;
1504 }
1505
1506 dtmp.ndigi = usax->sax25_ndigis;
1507
1508 while (ct < usax->sax25_ndigis) {
1509 dtmp.repeated[ct] = 0;
1510 dtmp.calls[ct] = fsa->fsa_digipeater[ct];
1511 ct++;
1512 }
1513
1514 dtmp.lastrepeat = 0;
1515 }
1516
1517 sax = *usax;
1518 if (sk->sk_type == SOCK_SEQPACKET &&
1519 ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
1520 err = -EISCONN;
1521 goto out;
1522 }
1523 if (usax->sax25_ndigis == 0)
1524 dp = NULL;
1525 else
1526 dp = &dtmp;
1527 } else {
1528 /*
1529 * FIXME: 1003.1g - if the socket is like this because
1530 * it has become closed (not started closed) and is VC
1531 * we ought to SIGPIPE, EPIPE
1532 */
1533 if (sk->sk_state != TCP_ESTABLISHED) {
1534 err = -ENOTCONN;
1535 goto out;
1536 }
1537 sax.sax25_family = AF_AX25;
1538 sax.sax25_call = ax25->dest_addr;
1539 dp = ax25->digipeat;
1540 }
1541
1da177e4 1542 /* Build a packet */
1da177e4
LT		 1543 /* Assume the worst case */
1544 size = len + ax25->ax25_dev->dev->hard_header_len;
1545
1546 skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
1547 if (skb == NULL)
1548 goto out;
1549
1550 skb_reserve(skb, size - len);
1551
1da177e4 1552 /* User data follows immediately after the AX.25 data */
6ce8e9ce 1553 if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
1da177e4
LT		 1554 err = -EFAULT;
1555 kfree_skb(skb);
1556 goto out;
1557 }
1558
c1d2bbe1 1559 skb_reset_network_header(skb);
1da177e4
LT		 1560
1561 /* Add the PID if one is not supplied by the user in the skb */
967b05f6
ACM		 1562 if (!ax25->pidincl)
1563 *skb_push(skb, 1) = sk->sk_protocol;
1da177e4 1564
1da177e4
LT		 1565 if (sk->sk_type == SOCK_SEQPACKET) {
1566 /* Connected mode sockets go via the LAPB machine */
1567 if (sk->sk_state != TCP_ESTABLISHED) {
1568 kfree_skb(skb);
1569 err = -ENOTCONN;
1570 goto out;
1571 }
1572
1573 /* Shove it onto the queue and kick */
1574 ax25_output(ax25, ax25->paclen, skb);
1575
1576 err = len;
1577 goto out;
1578 }
1579
967b05f6 1580 skb_push(skb, 1 + ax25_addr_size(dp));
1da177e4 1581
8849b720 1582 /* Building AX.25 Header */
1da177e4
LT		 1583
1584 /* Build an AX.25 header */
967b05f6
ACM		 1585 lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
1586 dp, AX25_COMMAND, AX25_MODULUS);
1da177e4 1587
967b05f6 1588 skb_set_transport_header(skb, lv);
1da177e4 1589
9c70220b 1590 *skb_transport_header(skb) = AX25_UI;
1da177e4
LT		 1591
1592 /* Datagram frames go straight out of the door as UI */
29c4be51 1593 ax25_queue_xmit(skb, ax25->ax25_dev->dev);
1da177e4
LT		 1594
1595 err = len;
1596
1597out:
1598 release_sock(sk);
1599
1600 return err;
1601}
1602
1b784140
YX		 1603static int ax25_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1604 int flags)
1da177e4
LT		 1605{
1606 struct sock *sk = sock->sk;
1607 struct sk_buff *skb;
1608 int copied;
1609 int err = 0;
1610
1611 lock_sock(sk);
1612 /*
1613 * This works for seqpacket too. The receiver has ordered the
1614 * queue for us! We do one quick check first though
1615 */
1616 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
1617 err = -ENOTCONN;
1618 goto out;
1619 }
1620
1621 /* Now we can treat all alike */
1622 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
528930b9 1623 flags & MSG_DONTWAIT, &err);
1da177e4
LT		 1624 if (skb == NULL)
1625 goto out;
1626
3200392b 1627 if (!sk_to_ax25(sk)->pidincl)
1da177e4
LT		 1628 skb_pull(skb, 1); /* Remove PID */
1629
badff6d0
ACM		 1630 skb_reset_transport_header(skb);
1631 copied = skb->len;
1da177e4
LT		 1632
1633 if (copied > size) {
1634 copied = size;
1635 msg->msg_flags |= MSG_TRUNC;
1636 }
1637
51f3d02b 1638 skb_copy_datagram_msg(skb, 0, msg, copied);
1da177e4 1639
f3d33426 1640 if (msg->msg_name) {
1da177e4
LT		 1641 ax25_digi digi;
1642 ax25_address src;
98e399f8 1643 const unsigned char *mac = skb_mac_header(skb);
342dfc30 1644 DECLARE_SOCKADDR(struct sockaddr_ax25 *, sax, msg->msg_name);
1da177e4 1645
ef3313e8 1646 memset(sax, 0, sizeof(struct full_sockaddr_ax25));
98e399f8
ACM		 1647 ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL,
1648 &digi, NULL, NULL);
1da177e4
LT		 1649 sax->sax25_family = AF_AX25;
1650 /* We set this correctly, even though we may not let the
1651 application know the digi calls further down (because it
1652 did NOT ask to know them). This could get political... **/
1653 sax->sax25_ndigis = digi.ndigi;
1654 sax->sax25_call = src;
1655
1656 if (sax->sax25_ndigis != 0) {
1657 int ct;
1658 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
1659
1660 for (ct = 0; ct < digi.ndigi; ct++)
1661 fsa->fsa_digipeater[ct] = digi.calls[ct];
1662 }
1663 msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
1664 }
1665
1666 skb_free_datagram(sk, skb);
1667 err = copied;
1668
1669out:
1670 release_sock(sk);
1671
1672 return err;
1673}
1674
1675static int ax25_shutdown(struct socket *sk, int how)
1676{
1677 /* FIXME - generate DM and RNR states */
1678 return -EOPNOTSUPP;
1679}
1680
1681static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1682{
1683 struct sock *sk = sock->sk;
1684 void __user *argp = (void __user *)arg;
1685 int res = 0;
1686
1687 lock_sock(sk);
1688 switch (cmd) {
1689 case TIOCOUTQ: {
1690 long amount;
31e6d363
ED		 1691
1692 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1da177e4
LT		 1693 if (amount < 0)
1694 amount = 0;
1695 res = put_user(amount, (int __user *)argp);
1696 break;
1697 }
1698
1699 case TIOCINQ: {
1700 struct sk_buff *skb;
1701 long amount = 0L;
1702 /* These two are safe on a single CPU system as only user tasks fiddle here */
1703 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1704 amount = skb->len;
20b7d10a 1705 res = put_user(amount, (int __user *) argp);
1da177e4
LT		 1706 break;
1707 }
1708
1709 case SIOCGSTAMP:
9b37ee75 1710 res = sock_get_timestamp(sk, argp);
1da177e4
LT		 1711 break;
1712
ae40eb1e
ED		 1713 case SIOCGSTAMPNS:
1714 res = sock_get_timestampns(sk, argp);
1715 break;
1716
1da177e4
LT		 1717 case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
1718 case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
1719 case SIOCAX25GETUID: {
1720 struct sockaddr_ax25 sax25;
1721 if (copy_from_user(&sax25, argp, sizeof(sax25))) {
1722 res = -EFAULT;
1723 break;
1724 }
1725 res = ax25_uid_ioctl(cmd, &sax25);
1726 break;
1727 }
1728
1729 case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
1730 long amount;
1731 if (!capable(CAP_NET_ADMIN)) {
1732 res = -EPERM;
1733 break;
1734 }
1735 if (get_user(amount, (long __user *)argp)) {
1736 res = -EFAULT;
1737 break;
1738 }
76887753 1739 if (amount < 0 || amount > AX25_NOUID_BLOCK) {
1da177e4
LT		 1740 res = -EINVAL;
1741 break;
1742 }
1743 ax25_uid_policy = amount;
1744 res = 0;
1745 break;
1746 }
1747
1748 case SIOCADDRT:
1749 case SIOCDELRT:
1750 case SIOCAX25OPTRT:
1751 if (!capable(CAP_NET_ADMIN)) {
1752 res = -EPERM;
1753 break;
1754 }
1755 res = ax25_rt_ioctl(cmd, argp);
1756 break;
1757
1758 case SIOCAX25CTLCON:
1759 if (!capable(CAP_NET_ADMIN)) {
1760 res = -EPERM;
1761 break;
1762 }
1763 res = ax25_ctl_ioctl(cmd, argp);
1764 break;
1765
1766 case SIOCAX25GETINFO:
1767 case SIOCAX25GETINFOOLD: {
3200392b 1768 ax25_cb *ax25 = sk_to_ax25(sk);
1da177e4
LT		 1769 struct ax25_info_struct ax25_info;
1770
1771 ax25_info.t1 = ax25->t1 / HZ;
1772 ax25_info.t2 = ax25->t2 / HZ;
1773 ax25_info.t3 = ax25->t3 / HZ;
1774 ax25_info.idle = ax25->idle / (60 * HZ);
1775 ax25_info.n2 = ax25->n2;
1776 ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
1777 ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
1778 ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
1779 ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
1780 ax25_info.n2count = ax25->n2count;
1781 ax25_info.state = ax25->state;
407fc5cf
ED		 1782 ax25_info.rcv_q = sk_rmem_alloc_get(sk);
1783 ax25_info.snd_q = sk_wmem_alloc_get(sk);
1da177e4
LT		 1784 ax25_info.vs = ax25->vs;
1785 ax25_info.vr = ax25->vr;
1786 ax25_info.va = ax25->va;
1787 ax25_info.vs_max = ax25->vs; /* reserved */
1788 ax25_info.paclen = ax25->paclen;
1789 ax25_info.window = ax25->window;
1790
1791 /* old structure? */
1792 if (cmd == SIOCAX25GETINFOOLD) {
1793 static int warned = 0;
1794 if (!warned) {
1795 printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
1796 current->comm);
1797 warned=1;
1798 }
1799
1800 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
1801 res = -EFAULT;
1802 break;
1803 }
1804 } else {
1805 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
1806 res = -EINVAL;
1807 break;
1808 }
1809 }
1810 res = 0;
1811 break;
1812 }
1813
1814 case SIOCAX25ADDFWD:
1815 case SIOCAX25DELFWD: {
1816 struct ax25_fwd_struct ax25_fwd;
1817 if (!capable(CAP_NET_ADMIN)) {
1818 res = -EPERM;
1819 break;
1820 }
1821 if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
1822 res = -EFAULT;
1823 break;
1824 }
1825 res = ax25_fwd_ioctl(cmd, &ax25_fwd);
1826 break;
1827 }
1828
1829 case SIOCGIFADDR:
1830 case SIOCSIFADDR:
1831 case SIOCGIFDSTADDR:
1832 case SIOCSIFDSTADDR:
1833 case SIOCGIFBRDADDR:
1834 case SIOCSIFBRDADDR:
1835 case SIOCGIFNETMASK:
1836 case SIOCSIFNETMASK:
1837 case SIOCGIFMETRIC:
1838 case SIOCSIFMETRIC:
1839 res = -EINVAL;
1840 break;
1841
1842 default:
b5e5fa5e 1843 res = -ENOIOCTLCMD;
1da177e4
LT		 1844 break;
1845 }
1846 release_sock(sk);
1847
1848 return res;
1849}
1850
1851#ifdef CONFIG_PROC_FS
1852
1853static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
f16f3026 1854 __acquires(ax25_list_lock)
1da177e4 1855{
1da177e4 1856 spin_lock_bh(&ax25_list_lock);
b512f3d8 1857 return seq_hlist_start(&ax25_list, *pos);
1da177e4
LT		 1858}
1859
1860static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
1861{
b512f3d8 1862 return seq_hlist_next(v, &ax25_list, pos);
1da177e4 1863}
528930b9 1864
1da177e4 1865static void ax25_info_stop(struct seq_file *seq, void *v)
f16f3026 1866 __releases(ax25_list_lock)
1da177e4
LT		 1867{
1868 spin_unlock_bh(&ax25_list_lock);
1869}
1870
1871static int ax25_info_show(struct seq_file *seq, void *v)
1872{
b512f3d8 1873 ax25_cb *ax25 = hlist_entry(v, struct ax25_cb, ax25_node);
f75268cd 1874 char buf[11];
1da177e4
LT		 1875 int k;
1876
1877
1878 /*
1879 * New format:
1880 * 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
1881 */
1882
1883 seq_printf(seq, "%8.8lx %s %s%s ",
1884 (long) ax25,
1885 ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
f75268cd 1886 ax2asc(buf, &ax25->source_addr),
1da177e4 1887 ax25->iamdigi? "*":"");
f75268cd 1888 seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
1da177e4
LT		 1889
1890 for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
1891 seq_printf(seq, ",%s%s",
f75268cd 1892 ax2asc(buf, &ax25->digipeat->calls[k]),
1da177e4
LT		 1893 ax25->digipeat->repeated[k]? "*":"");
1894 }
1895
1896 seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
1897 ax25->state,
1898 ax25->vs, ax25->vr, ax25->va,
1899 ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
1900 ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
1901 ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
1902 ax25_display_timer(&ax25->idletimer) / (60 * HZ),
1903 ax25->idle / (60 * HZ),
1904 ax25->n2count, ax25->n2,
1905 ax25->rtt / HZ,
1906 ax25->window,
1907 ax25->paclen);
1908
1909 if (ax25->sk != NULL) {
1105b5d1 1910 seq_printf(seq, " %d %d %lu\n",
31e6d363
ED		 1911 sk_wmem_alloc_get(ax25->sk),
1912 sk_rmem_alloc_get(ax25->sk),
1105b5d1 1913 sock_i_ino(ax25->sk));
1da177e4
LT		 1914 } else {
1915 seq_puts(seq, " * * *\n");
1916 }
1917 return 0;
1918}
1919
56b3d975 1920static const struct seq_operations ax25_info_seqops = {
1da177e4
LT		 1921 .start = ax25_info_start,
1922 .next = ax25_info_next,
1923 .stop = ax25_info_stop,
1924 .show = ax25_info_show,
1925};
1926
1927static int ax25_info_open(struct inode *inode, struct file *file)
1928{
1929 return seq_open(file, &ax25_info_seqops);
1930}
1931
9a32144e 1932static const struct file_operations ax25_info_fops = {
1da177e4
LT		 1933 .owner = THIS_MODULE,
1934 .open = ax25_info_open,
1935 .read = seq_read,
1936 .llseek = seq_lseek,
1937 .release = seq_release,
1938};
1939
1940#endif
1941
ec1b4cf7 1942static const struct net_proto_family ax25_family_ops = {
1da177e4
LT		 1943 .family = PF_AX25,
1944 .create = ax25_create,
1945 .owner = THIS_MODULE,
1946};
1947
90ddc4f0 1948static const struct proto_ops ax25_proto_ops = {
4676356b
RB		 1949 .family = PF_AX25,
1950 .owner = THIS_MODULE,
1951 .release = ax25_release,
1952 .bind = ax25_bind,
1953 .connect = ax25_connect,
1954 .socketpair = sock_no_socketpair,
1955 .accept = ax25_accept,
1956 .getname = ax25_getname,
1957 .poll = datagram_poll,
1958 .ioctl = ax25_ioctl,
1959 .listen = ax25_listen,
1960 .shutdown = ax25_shutdown,
1961 .setsockopt = ax25_setsockopt,
1962 .getsockopt = ax25_getsockopt,
1963 .sendmsg = ax25_sendmsg,
1964 .recvmsg = ax25_recvmsg,
1965 .mmap = sock_no_mmap,
1966 .sendpage = sock_no_sendpage,
1da177e4
LT		 1967};
1968
1969/*
1970 * Called by socket.c on kernel start up
1971 */
7546dd97 1972static struct packet_type ax25_packet_type __read_mostly = {
09640e63 1973 .type = cpu_to_be16(ETH_P_AX25),
1da177e4
LT		 1974 .func = ax25_kiss_rcv,
1975};
1976
1977static struct notifier_block ax25_dev_notifier = {
351638e7 1978 .notifier_call = ax25_device_event,
1da177e4
LT		 1979};
1980
1da177e4
LT		 1981static int __init ax25_init(void)
1982{
1983 int rc = proto_register(&ax25_proto, 0);
1984
1985 if (rc != 0)
1986 goto out;
1987
1988 sock_register(&ax25_family_ops);
1989 dev_add_pack(&ax25_packet_type);
1990 register_netdevice_notifier(&ax25_dev_notifier);
1da177e4 1991
d4beaa66
G		 1992 proc_create("ax25_route", S_IRUGO, init_net.proc_net,
1993 &ax25_route_fops);
1994 proc_create("ax25", S_IRUGO, init_net.proc_net, &ax25_info_fops);
1995 proc_create("ax25_calls", S_IRUGO, init_net.proc_net, &ax25_uid_fops);
1da177e4
LT		 1996out:
1997 return rc;
1998}
1999module_init(ax25_init);
2000
2001
2002MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
2003MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
2004MODULE_LICENSE("GPL");
2005MODULE_ALIAS_NETPROTO(PF_AX25);
2006
2007static void __exit ax25_exit(void)
2008{
ece31ffd
G		 2009 remove_proc_entry("ax25_route", init_net.proc_net);
2010 remove_proc_entry("ax25", init_net.proc_net);
2011 remove_proc_entry("ax25_calls", init_net.proc_net);
1da177e4 2012
1da177e4
LT		 2013 unregister_netdevice_notifier(&ax25_dev_notifier);
2014
2015 dev_remove_pack(&ax25_packet_type);
2016
2017 sock_unregister(PF_AX25);
2018 proto_unregister(&ax25_proto);
3adadc08
EB		 2019
2020 ax25_rt_free();
2021 ax25_uid_free();
2022 ax25_dev_free();
1da177e4
LT		 2023}
2024module_exit(ax25_exit);
Linux 6.x block layer and io_uring tree(s)