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Merge tag 'trace-v4.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
[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 ([email protected])
8 * Copyright (C) Jonathan Naylor G4KLX ([email protected])
9 * Copyright (C) Darryl Miles G7LED ([email protected])
10 * Copyright (C) Steven Whitehouse GW7RRM ([email protected])
11 * Copyright (C) Joerg Reuter DL1BKE ([email protected])
12 * Copyright (C) Hans-Joachim Hetscher DD8NE ([email protected])
13 * Copyright (C) Hans Alblas PE1AYX ([email protected])
14 * Copyright (C) Frederic Rible F1OAT ([email protected])
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>
43#include <linux/netfilter.h>
44#include <linux/sysctl.h>
45#include <linux/init.h>
46#include <linux/spinlock.h>
457c4cbc 47#include <net/net_namespace.h>
c752f073 48#include <net/tcp_states.h>
1da177e4
LT		 49#include <net/ip.h>
50#include <net/arp.h>
51
52
53
54HLIST_HEAD(ax25_list);
55DEFINE_SPINLOCK(ax25_list_lock);
56
90ddc4f0 57static const struct proto_ops ax25_proto_ops;
1da177e4
LT		 58
59static void ax25_free_sock(struct sock *sk)
60{
61 ax25_cb_put(ax25_sk(sk));
62}
63
64/*
65 * Socket removal during an interrupt is now safe.
66 */
67static void ax25_cb_del(ax25_cb *ax25)
68{
69 if (!hlist_unhashed(&ax25->ax25_node)) {
70 spin_lock_bh(&ax25_list_lock);
71 hlist_del_init(&ax25->ax25_node);
72 spin_unlock_bh(&ax25_list_lock);
73 ax25_cb_put(ax25);
74 }
75}
76
77/*
78 * Kill all bound sockets on a dropped device.
79 */
80static void ax25_kill_by_device(struct net_device *dev)
81{
82 ax25_dev *ax25_dev;
83 ax25_cb *s;
1da177e4
LT		 84
85 if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
86 return;
87
88 spin_lock_bh(&ax25_list_lock);
ecd2ebde 89again:
b67bfe0d 90 ax25_for_each(s, &ax25_list) {
1da177e4
LT		 91 if (s->ax25_dev == ax25_dev) {
92 s->ax25_dev = NULL;
ecd2ebde 93 spin_unlock_bh(&ax25_list_lock);
1da177e4 94 ax25_disconnect(s, ENETUNREACH);
ecd2ebde
JP		 95 spin_lock_bh(&ax25_list_lock);
96
97 /* The entry could have been deleted from the
98 * list meanwhile and thus the next pointer is
99 * no longer valid. Play it safe and restart
100 * the scan. Forward progress is ensured
101 * because we set s->ax25_dev to NULL and we
102 * are never passed a NULL 'dev' argument.
103 */
104 goto again;
1da177e4
LT		 105 }
106 }
107 spin_unlock_bh(&ax25_list_lock);
108}
109
110/*
111 * Handle device status changes.
112 */
113static int ax25_device_event(struct notifier_block *this, unsigned long event,
351638e7 114 void *ptr)
1da177e4 115{
351638e7 116 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1da177e4 117
721499e8 118 if (!net_eq(dev_net(dev), &init_net))
e9dc8653
EB		 119 return NOTIFY_DONE;
120
1da177e4
LT		 121 /* Reject non AX.25 devices */
122 if (dev->type != ARPHRD_AX25)
123 return NOTIFY_DONE;
124
125 switch (event) {
126 case NETDEV_UP:
127 ax25_dev_device_up(dev);
128 break;
129 case NETDEV_DOWN:
130 ax25_kill_by_device(dev);
131 ax25_rt_device_down(dev);
132 ax25_dev_device_down(dev);
133 break;
134 default:
135 break;
136 }
137
138 return NOTIFY_DONE;
139}
140
141/*
142 * Add a socket to the bound sockets list.
143 */
144void ax25_cb_add(ax25_cb *ax25)
145{
146 spin_lock_bh(&ax25_list_lock);
147 ax25_cb_hold(ax25);
148 hlist_add_head(&ax25->ax25_node, &ax25_list);
149 spin_unlock_bh(&ax25_list_lock);
150}
151
152/*
153 * Find a socket that wants to accept the SABM we have just
154 * received.
155 */
156struct sock *ax25_find_listener(ax25_address *addr, int digi,
157 struct net_device *dev, int type)
158{
159 ax25_cb *s;
1da177e4 160
c19c4b9c 161 spin_lock(&ax25_list_lock);
b67bfe0d 162 ax25_for_each(s, &ax25_list) {
1da177e4
LT		 163 if ((s->iamdigi && !digi) || (!s->iamdigi && digi))
164 continue;
165 if (s->sk && !ax25cmp(&s->source_addr, addr) &&
166 s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) {
167 /* If device is null we match any device */
168 if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) {
169 sock_hold(s->sk);
c19c4b9c 170 spin_unlock(&ax25_list_lock);
1da177e4
LT		 171 return s->sk;
172 }
173 }
174 }
c19c4b9c 175 spin_unlock(&ax25_list_lock);
1da177e4
LT		 176
177 return NULL;
178}
179
180/*
181 * Find an AX.25 socket given both ends.
182 */
183struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr,
184 int type)
185{
186 struct sock *sk = NULL;
187 ax25_cb *s;
1da177e4 188
c19c4b9c 189 spin_lock(&ax25_list_lock);
b67bfe0d 190 ax25_for_each(s, &ax25_list) {
1da177e4
LT		 191 if (s->sk && !ax25cmp(&s->source_addr, my_addr) &&
192 !ax25cmp(&s->dest_addr, dest_addr) &&
193 s->sk->sk_type == type) {
194 sk = s->sk;
195 sock_hold(sk);
196 break;
197 }
198 }
199
c19c4b9c 200 spin_unlock(&ax25_list_lock);
1da177e4
LT		 201
202 return sk;
203}
204
205/*
206 * Find an AX.25 control block given both ends. It will only pick up
207 * floating AX.25 control blocks or non Raw socket bound control blocks.
208 */
209ax25_cb *ax25_find_cb(ax25_address *src_addr, ax25_address *dest_addr,
210 ax25_digi *digi, struct net_device *dev)
211{
212 ax25_cb *s;
1da177e4
LT		 213
214 spin_lock_bh(&ax25_list_lock);
b67bfe0d 215 ax25_for_each(s, &ax25_list) {
1da177e4
LT		 216 if (s->sk && s->sk->sk_type != SOCK_SEQPACKET)
217 continue;
218 if (s->ax25_dev == NULL)
219 continue;
220 if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) {
221 if (digi != NULL && digi->ndigi != 0) {
222 if (s->digipeat == NULL)
223 continue;
224 if (ax25digicmp(s->digipeat, digi) != 0)
225 continue;
226 } else {
227 if (s->digipeat != NULL && s->digipeat->ndigi != 0)
228 continue;
229 }
230 ax25_cb_hold(s);
231 spin_unlock_bh(&ax25_list_lock);
232
233 return s;
234 }
235 }
236 spin_unlock_bh(&ax25_list_lock);
237
238 return NULL;
239}
240
70868eac
RB		 241EXPORT_SYMBOL(ax25_find_cb);
242
1da177e4
LT		 243void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto)
244{
245 ax25_cb *s;
246 struct sk_buff *copy;
1da177e4 247
c19c4b9c 248 spin_lock(&ax25_list_lock);
b67bfe0d 249 ax25_for_each(s, &ax25_list) {
1da177e4
LT		 250 if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 &&
251 s->sk->sk_type == SOCK_RAW &&
252 s->sk->sk_protocol == proto &&
253 s->ax25_dev->dev == skb->dev &&
254 atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) {
255 if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL)
256 continue;
257 if (sock_queue_rcv_skb(s->sk, copy) != 0)
258 kfree_skb(copy);
259 }
260 }
c19c4b9c 261 spin_unlock(&ax25_list_lock);
1da177e4
LT		 262}
263
264/*
265 * Deferred destroy.
266 */
267void ax25_destroy_socket(ax25_cb *);
268
269/*
270 * Handler for deferred kills.
271 */
272static void ax25_destroy_timer(unsigned long data)
273{
274 ax25_cb *ax25=(ax25_cb *)data;
275 struct sock *sk;
528930b9 276
1da177e4 277 sk=ax25->sk;
528930b9 278
1da177e4
LT		 279 bh_lock_sock(sk);
280 sock_hold(sk);
281 ax25_destroy_socket(ax25);
282 bh_unlock_sock(sk);
283 sock_put(sk);
284}
285
286/*
287 * This is called from user mode and the timers. Thus it protects itself
288 * against interrupt users but doesn't worry about being called during
289 * work. Once it is removed from the queue no interrupt or bottom half
290 * will touch it and we are (fairly 8-) ) safe.
291 */
292void ax25_destroy_socket(ax25_cb *ax25)
293{
294 struct sk_buff *skb;
295
296 ax25_cb_del(ax25);
297
298 ax25_stop_heartbeat(ax25);
299 ax25_stop_t1timer(ax25);
300 ax25_stop_t2timer(ax25);
301 ax25_stop_t3timer(ax25);
302 ax25_stop_idletimer(ax25);
303
304 ax25_clear_queues(ax25); /* Flush the queues */
305
306 if (ax25->sk != NULL) {
307 while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) {
308 if (skb->sk != ax25->sk) {
309 /* A pending connection */
310 ax25_cb *sax25 = ax25_sk(skb->sk);
311
312 /* Queue the unaccepted socket for death */
313 sock_orphan(skb->sk);
314
33d1d2c5
DM		 315 /* 9A4GL: hack to release unaccepted sockets */
316 skb->sk->sk_state = TCP_LISTEN;
317
1da177e4
LT		 318 ax25_start_heartbeat(sax25);
319 sax25->state = AX25_STATE_0;
320 }
321
322 kfree_skb(skb);
323 }
324 skb_queue_purge(&ax25->sk->sk_write_queue);
325 }
326
327 if (ax25->sk != NULL) {
c564039f 328 if (sk_has_allocations(ax25->sk)) {
1da177e4 329 /* Defer: outstanding buffers */
b24b8a24
PE		 330 setup_timer(&ax25->dtimer, ax25_destroy_timer,
331 (unsigned long)ax25);
1da177e4 332 ax25->dtimer.expires = jiffies + 2 * HZ;
1da177e4
LT		 333 add_timer(&ax25->dtimer);
334 } else {
335 struct sock *sk=ax25->sk;
336 ax25->sk=NULL;
337 sock_put(sk);
338 }
339 } else {
340 ax25_cb_put(ax25);
341 }
342}
343
344/*
345 * dl1bke 960311: set parameters for existing AX.25 connections,
346 * includes a KILL command to abort any connection.
347 * VERY useful for debugging ;-)
348 */
349static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
350{
351 struct ax25_ctl_struct ax25_ctl;
352 ax25_digi digi;
353 ax25_dev *ax25_dev;
354 ax25_cb *ax25;
355 unsigned int k;
c0181d42 356 int ret = 0;
1da177e4
LT		 357
358 if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
359 return -EFAULT;
360
361 if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL)
362 return -ENODEV;
363
364 if (ax25_ctl.digi_count > AX25_MAX_DIGIS)
365 return -EINVAL;
366
43ab8502 367 if (ax25_ctl.arg > ULONG_MAX / HZ && ax25_ctl.cmd != AX25_KILL)
368 return -EINVAL;
369
1da177e4
LT		 370 digi.ndigi = ax25_ctl.digi_count;
371 for (k = 0; k < digi.ndigi; k++)
372 digi.calls[k] = ax25_ctl.digi_addr[k];
373
374 if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL)
375 return -ENOTCONN;
376
377 switch (ax25_ctl.cmd) {
378 case AX25_KILL:
379 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
380#ifdef CONFIG_AX25_DAMA_SLAVE
381 if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
382 ax25_dama_off(ax25);
383#endif
384 ax25_disconnect(ax25, ENETRESET);
385 break;
386
528930b9
YH		 387 case AX25_WINDOW:
388 if (ax25->modulus == AX25_MODULUS) {
389 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
c0181d42 390 goto einval_put;
528930b9
YH		 391 } else {
392 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
c0181d42 393 goto einval_put;
528930b9
YH		 394 }
395 ax25->window = ax25_ctl.arg;
396 break;
397
398 case AX25_T1:
be639ac6 399 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
c0181d42 400 goto einval_put;
528930b9
YH		 401 ax25->rtt = (ax25_ctl.arg * HZ) / 2;
402 ax25->t1 = ax25_ctl.arg * HZ;
403 break;
404
405 case AX25_T2:
be639ac6 406 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
c0181d42 407 goto einval_put;
528930b9
YH		 408 ax25->t2 = ax25_ctl.arg * HZ;
409 break;
410
411 case AX25_N2:
412 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
c0181d42 413 goto einval_put;
528930b9
YH		 414 ax25->n2count = 0;
415 ax25->n2 = ax25_ctl.arg;
416 break;
417
418 case AX25_T3:
be639ac6
RB		 419 if (ax25_ctl.arg > ULONG_MAX / HZ)
420 goto einval_put;
528930b9
YH		 421 ax25->t3 = ax25_ctl.arg * HZ;
422 break;
423
424 case AX25_IDLE:
be639ac6
RB		 425 if (ax25_ctl.arg > ULONG_MAX / (60 * HZ))
426 goto einval_put;
427
528930b9
YH		 428 ax25->idle = ax25_ctl.arg * 60 * HZ;
429 break;
430
431 case AX25_PACLEN:
432 if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
c0181d42 433 goto einval_put;
528930b9
YH		 434 ax25->paclen = ax25_ctl.arg;
435 break;
436
437 default:
c0181d42 438 goto einval_put;
1da177e4
LT		 439 }
440
c0181d42
JP		 441out_put:
442 ax25_cb_put(ax25);
443 return ret;
444
445einval_put:
446 ret = -EINVAL;
447 goto out_put;
1da177e4
LT		 448}
449
e1fdb5b3
RB		 450static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev)
451{
452 ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2;
453 ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]);
454 ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]);
455 ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]);
456 ax25->n2 = ax25_dev->values[AX25_VALUES_N2];
457 ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN];
458 ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]);
459 ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF];
460
461 if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) {
462 ax25->modulus = AX25_EMODULUS;
463 ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
464 } else {
465 ax25->modulus = AX25_MODULUS;
466 ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
467 }
468}
469
1da177e4
LT		 470/*
471 * Fill in a created AX.25 created control block with the default
472 * values for a particular device.
473 */
474void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev)
475{
476 ax25->ax25_dev = ax25_dev;
477
478 if (ax25->ax25_dev != NULL) {
e1fdb5b3
RB		 479 ax25_fillin_cb_from_dev(ax25, ax25_dev);
480 return;
481 }
482
483 /*
484 * No device, use kernel / AX.25 spec default values
485 */
486 ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2;
487 ax25->t1 = msecs_to_jiffies(AX25_DEF_T1);
488 ax25->t2 = msecs_to_jiffies(AX25_DEF_T2);
489 ax25->t3 = msecs_to_jiffies(AX25_DEF_T3);
490 ax25->n2 = AX25_DEF_N2;
491 ax25->paclen = AX25_DEF_PACLEN;
492 ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE);
493 ax25->backoff = AX25_DEF_BACKOFF;
494
495 if (AX25_DEF_AXDEFMODE) {
496 ax25->modulus = AX25_EMODULUS;
497 ax25->window = AX25_DEF_EWINDOW;
1da177e4 498 } else {
e1fdb5b3
RB		 499 ax25->modulus = AX25_MODULUS;
500 ax25->window = AX25_DEF_WINDOW;
1da177e4
LT		 501 }
502}
503
504/*
505 * Create an empty AX.25 control block.
506 */
507ax25_cb *ax25_create_cb(void)
508{
509 ax25_cb *ax25;
510
1b30dd35 511 if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL)
1da177e4
LT		 512 return NULL;
513
1da177e4
LT		 514 atomic_set(&ax25->refcount, 1);
515
516 skb_queue_head_init(&ax25->write_queue);
517 skb_queue_head_init(&ax25->frag_queue);
518 skb_queue_head_init(&ax25->ack_queue);
519 skb_queue_head_init(&ax25->reseq_queue);
520
21fab4a8 521 ax25_setup_timers(ax25);
1da177e4
LT		 522
523 ax25_fillin_cb(ax25, NULL);
524
525 ax25->state = AX25_STATE_0;
526
527 return ax25;
528}
529
530/*
531 * Handling for system calls applied via the various interfaces to an
532 * AX25 socket object
533 */
534
535static int ax25_setsockopt(struct socket *sock, int level, int optname,
b7058842 536 char __user *optval, unsigned int optlen)
1da177e4
LT		 537{
538 struct sock *sk = sock->sk;
539 ax25_cb *ax25;
540 struct net_device *dev;
541 char devname[IFNAMSIZ];
ba1cffe0
XW		 542 unsigned long opt;
543 int res = 0;
1da177e4
LT		 544
545 if (level != SOL_AX25)
546 return -ENOPROTOOPT;
547
ba1cffe0 548 if (optlen < sizeof(unsigned int))
1da177e4
LT		 549 return -EINVAL;
550
ba1cffe0 551 if (get_user(opt, (unsigned int __user *)optval))
1da177e4
LT		 552 return -EFAULT;
553
554 lock_sock(sk);
555 ax25 = ax25_sk(sk);
556
557 switch (optname) {
558 case AX25_WINDOW:
559 if (ax25->modulus == AX25_MODULUS) {
560 if (opt < 1 || opt > 7) {
561 res = -EINVAL;
562 break;
563 }
564 } else {
565 if (opt < 1 || opt > 63) {
566 res = -EINVAL;
567 break;
568 }
569 }
570 ax25->window = opt;
571 break;
572
573 case AX25_T1:
be639ac6 574 if (opt < 1 || opt > ULONG_MAX / HZ) {
1da177e4
LT		 575 res = -EINVAL;
576 break;
577 }
f16f3026 578 ax25->rtt = (opt * HZ) >> 1;
1da177e4
LT		 579 ax25->t1 = opt * HZ;
580 break;
581
582 case AX25_T2:
be639ac6 583 if (opt < 1 || opt > ULONG_MAX / HZ) {
1da177e4
LT		 584 res = -EINVAL;
585 break;
586 }
587 ax25->t2 = opt * HZ;
588 break;
589
590 case AX25_N2:
591 if (opt < 1 || opt > 31) {
592 res = -EINVAL;
593 break;
594 }
595 ax25->n2 = opt;
596 break;
597
598 case AX25_T3:
be639ac6 599 if (opt < 1 || opt > ULONG_MAX / HZ) {
1da177e4
LT		 600 res = -EINVAL;
601 break;
602 }
603 ax25->t3 = opt * HZ;
604 break;
605
606 case AX25_IDLE:
ba1cffe0 607 if (opt > ULONG_MAX / (60 * HZ)) {
1da177e4
LT		 608 res = -EINVAL;
609 break;
610 }
611 ax25->idle = opt * 60 * HZ;
612 break;
613
614 case AX25_BACKOFF:
ba1cffe0 615 if (opt > 2) {
1da177e4
LT		 616 res = -EINVAL;
617 break;
618 }
619 ax25->backoff = opt;
620 break;
621
622 case AX25_EXTSEQ:
623 ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
624 break;
625
626 case AX25_PIDINCL:
627 ax25->pidincl = opt ? 1 : 0;
628 break;
629
630 case AX25_IAMDIGI:
631 ax25->iamdigi = opt ? 1 : 0;
632 break;
633
634 case AX25_PACLEN:
635 if (opt < 16 || opt > 65535) {
636 res = -EINVAL;
637 break;
638 }
639 ax25->paclen = opt;
640 break;
641
642 case SO_BINDTODEVICE:
643 if (optlen > IFNAMSIZ)
2f72291d 644 optlen = IFNAMSIZ;
1da177e4 645
2f72291d
RB		 646 if (copy_from_user(devname, optval, optlen)) {
647 res = -EFAULT;
1da177e4
LT		 648 break;
649 }
650
651 if (sk->sk_type == SOCK_SEQPACKET &&
652 (sock->state != SS_UNCONNECTED ||
653 sk->sk_state == TCP_LISTEN)) {
654 res = -EADDRNOTAVAIL;
2f72291d
RB		 655 break;
656 }
657
658 dev = dev_get_by_name(&init_net, devname);
659 if (!dev) {
660 res = -ENODEV;
1da177e4
LT		 661 break;
662 }
663
664 ax25->ax25_dev = ax25_dev_ax25dev(dev);
665 ax25_fillin_cb(ax25, ax25->ax25_dev);
2f72291d 666 dev_put(dev);
1da177e4
LT		 667 break;
668
669 default:
670 res = -ENOPROTOOPT;
671 }
672 release_sock(sk);
673
674 return res;
675}
676
677static int ax25_getsockopt(struct socket *sock, int level, int optname,
678 char __user *optval, int __user *optlen)
679{
680 struct sock *sk = sock->sk;
681 ax25_cb *ax25;
682 struct ax25_dev *ax25_dev;
683 char devname[IFNAMSIZ];
684 void *valptr;
685 int val = 0;
686 int maxlen, length;
687
688 if (level != SOL_AX25)
689 return -ENOPROTOOPT;
690
691 if (get_user(maxlen, optlen))
692 return -EFAULT;
693
694 if (maxlen < 1)
695 return -EFAULT;
696
697 valptr = (void *) &val;
698 length = min_t(unsigned int, maxlen, sizeof(int));
699
700 lock_sock(sk);
701 ax25 = ax25_sk(sk);
702
703 switch (optname) {
704 case AX25_WINDOW:
705 val = ax25->window;
706 break;
707
708 case AX25_T1:
709 val = ax25->t1 / HZ;
710 break;
711
712 case AX25_T2:
713 val = ax25->t2 / HZ;
714 break;
715
716 case AX25_N2:
717 val = ax25->n2;
718 break;
719
720 case AX25_T3:
721 val = ax25->t3 / HZ;
722 break;
723
724 case AX25_IDLE:
725 val = ax25->idle / (60 * HZ);
726 break;
727
728 case AX25_BACKOFF:
729 val = ax25->backoff;
730 break;
731
732 case AX25_EXTSEQ:
733 val = (ax25->modulus == AX25_EMODULUS);
734 break;
735
736 case AX25_PIDINCL:
737 val = ax25->pidincl;
738 break;
739
740 case AX25_IAMDIGI:
741 val = ax25->iamdigi;
742 break;
743
744 case AX25_PACLEN:
745 val = ax25->paclen;
746 break;
747
748 case SO_BINDTODEVICE:
749 ax25_dev = ax25->ax25_dev;
750
751 if (ax25_dev != NULL && ax25_dev->dev != NULL) {
752 strlcpy(devname, ax25_dev->dev->name, sizeof(devname));
753 length = strlen(devname) + 1;
754 } else {
755 *devname = '\0';
756 length = 1;
757 }
758
759 valptr = (void *) devname;
760 break;
761
762 default:
763 release_sock(sk);
764 return -ENOPROTOOPT;
765 }
766 release_sock(sk);
767
768 if (put_user(length, optlen))
769 return -EFAULT;
770
771 return copy_to_user(optval, valptr, length) ? -EFAULT : 0;
772}
773
774static int ax25_listen(struct socket *sock, int backlog)
775{
776 struct sock *sk = sock->sk;
777 int res = 0;
778
779 lock_sock(sk);
780 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) {
781 sk->sk_max_ack_backlog = backlog;
782 sk->sk_state = TCP_LISTEN;
783 goto out;
784 }
785 res = -EOPNOTSUPP;
786
787out:
788 release_sock(sk);
789
790 return res;
791}
792
793/*
794 * XXX: when creating ax25_sock we should update the .obj_size setting
795 * below.
796 */
797static struct proto ax25_proto = {
798 .name = "AX25",
799 .owner = THIS_MODULE,
800 .obj_size = sizeof(struct sock),
801};
802
3f378b68
EP		 803static int ax25_create(struct net *net, struct socket *sock, int protocol,
804 int kern)
1da177e4
LT		 805{
806 struct sock *sk;
807 ax25_cb *ax25;
808
09ad9bc7 809 if (!net_eq(net, &init_net))
1b8d7ae4
EB		 810 return -EAFNOSUPPORT;
811
1da177e4
LT		 812 switch (sock->type) {
813 case SOCK_DGRAM:
814 if (protocol == 0 || protocol == PF_AX25)
815 protocol = AX25_P_TEXT;
816 break;
817
818 case SOCK_SEQPACKET:
819 switch (protocol) {
820 case 0:
821 case PF_AX25: /* For CLX */
822 protocol = AX25_P_TEXT;
823 break;
824 case AX25_P_SEGMENT:
825#ifdef CONFIG_INET
826 case AX25_P_ARP:
827 case AX25_P_IP:
828#endif
829#ifdef CONFIG_NETROM
830 case AX25_P_NETROM:
831#endif
832#ifdef CONFIG_ROSE
833 case AX25_P_ROSE:
834#endif
835 return -ESOCKTNOSUPPORT;
836#ifdef CONFIG_NETROM_MODULE
837 case AX25_P_NETROM:
838 if (ax25_protocol_is_registered(AX25_P_NETROM))
839 return -ESOCKTNOSUPPORT;
ef764a13 840 break;
1da177e4
LT		 841#endif
842#ifdef CONFIG_ROSE_MODULE
843 case AX25_P_ROSE:
844 if (ax25_protocol_is_registered(AX25_P_ROSE))
845 return -ESOCKTNOSUPPORT;
846#endif
847 default:
848 break;
849 }
850 break;
851
852 case SOCK_RAW:
853 break;
854 default:
855 return -ESOCKTNOSUPPORT;
856 }
857
6257ff21
PE		 858 sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto);
859 if (sk == NULL)
1da177e4
LT		 860 return -ENOMEM;
861
862 ax25 = sk->sk_protinfo = ax25_create_cb();
863 if (!ax25) {
864 sk_free(sk);
865 return -ENOMEM;
866 }
867
868 sock_init_data(sock, sk);
869
870 sk->sk_destruct = ax25_free_sock;
871 sock->ops = &ax25_proto_ops;
872 sk->sk_protocol = protocol;
873
874 ax25->sk = sk;
875
876 return 0;
877}
878
879struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
880{
881 struct sock *sk;
882 ax25_cb *ax25, *oax25;
883
3b1e0a65 884 sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot);
6257ff21 885 if (sk == NULL)
1da177e4
LT		 886 return NULL;
887
888 if ((ax25 = ax25_create_cb()) == NULL) {
889 sk_free(sk);
890 return NULL;
891 }
892
893 switch (osk->sk_type) {
894 case SOCK_DGRAM:
895 break;
896 case SOCK_SEQPACKET:
897 break;
898 default:
899 sk_free(sk);
900 ax25_cb_put(ax25);
901 return NULL;
902 }
903
904 sock_init_data(NULL, sk);
905
1da177e4 906 sk->sk_type = osk->sk_type;
1da177e4
LT		 907 sk->sk_priority = osk->sk_priority;
908 sk->sk_protocol = osk->sk_protocol;
909 sk->sk_rcvbuf = osk->sk_rcvbuf;
910 sk->sk_sndbuf = osk->sk_sndbuf;
911 sk->sk_state = TCP_ESTABLISHED;
53b924b3 912 sock_copy_flags(sk, osk);
1da177e4
LT		 913
914 oax25 = ax25_sk(osk);
915
916 ax25->modulus = oax25->modulus;
917 ax25->backoff = oax25->backoff;
918 ax25->pidincl = oax25->pidincl;
919 ax25->iamdigi = oax25->iamdigi;
920 ax25->rtt = oax25->rtt;
921 ax25->t1 = oax25->t1;
922 ax25->t2 = oax25->t2;
923 ax25->t3 = oax25->t3;
924 ax25->n2 = oax25->n2;
925 ax25->idle = oax25->idle;
926 ax25->paclen = oax25->paclen;
927 ax25->window = oax25->window;
928
929 ax25->ax25_dev = ax25_dev;
930 ax25->source_addr = oax25->source_addr;
931
932 if (oax25->digipeat != NULL) {
0459d70a
ACM		 933 ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
934 GFP_ATOMIC);
935 if (ax25->digipeat == NULL) {
1da177e4
LT		 936 sk_free(sk);
937 ax25_cb_put(ax25);
938 return NULL;
939 }
1da177e4
LT		 940 }
941
942 sk->sk_protinfo = ax25;
8c185ab6 943 sk->sk_destruct = ax25_free_sock;
1da177e4
LT		 944 ax25->sk = sk;
945
946 return sk;
947}
948
949static int ax25_release(struct socket *sock)
950{
951 struct sock *sk = sock->sk;
952 ax25_cb *ax25;
953
954 if (sk == NULL)
955 return 0;
956
957 sock_hold(sk);
958 sock_orphan(sk);
959 lock_sock(sk);
960 ax25 = ax25_sk(sk);
961
962 if (sk->sk_type == SOCK_SEQPACKET) {
963 switch (ax25->state) {
964 case AX25_STATE_0:
965 release_sock(sk);
966 ax25_disconnect(ax25, 0);
967 lock_sock(sk);
968 ax25_destroy_socket(ax25);
969 break;
970
971 case AX25_STATE_1:
972 case AX25_STATE_2:
973 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
974 release_sock(sk);
975 ax25_disconnect(ax25, 0);
976 lock_sock(sk);
977 ax25_destroy_socket(ax25);
978 break;
979
980 case AX25_STATE_3:
981 case AX25_STATE_4:
982 ax25_clear_queues(ax25);
983 ax25->n2count = 0;
984
985 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
986 case AX25_PROTO_STD_SIMPLEX:
987 case AX25_PROTO_STD_DUPLEX:
988 ax25_send_control(ax25,
989 AX25_DISC,
990 AX25_POLLON,
991 AX25_COMMAND);
992 ax25_stop_t2timer(ax25);
993 ax25_stop_t3timer(ax25);
994 ax25_stop_idletimer(ax25);
995 break;
996#ifdef CONFIG_AX25_DAMA_SLAVE
997 case AX25_PROTO_DAMA_SLAVE:
998 ax25_stop_t3timer(ax25);
999 ax25_stop_idletimer(ax25);
1000 break;
1001#endif
1002 }
1003 ax25_calculate_t1(ax25);
1004 ax25_start_t1timer(ax25);
1005 ax25->state = AX25_STATE_2;
1006 sk->sk_state = TCP_CLOSE;
1007 sk->sk_shutdown |= SEND_SHUTDOWN;
1008 sk->sk_state_change(sk);
1009 sock_set_flag(sk, SOCK_DESTROY);
1010 break;
1011
1012 default:
1013 break;
1014 }
1015 } else {
1016 sk->sk_state = TCP_CLOSE;
1017 sk->sk_shutdown |= SEND_SHUTDOWN;
1018 sk->sk_state_change(sk);
1019 ax25_destroy_socket(ax25);
1020 }
1021
1022 sock->sk = NULL;
1023 release_sock(sk);
1024 sock_put(sk);
1025
1026 return 0;
1027}
1028
1029/*
1030 * We support a funny extension here so you can (as root) give any callsign
1031 * digipeated via a local address as source. This hack is obsolete now
1032 * that we've implemented support for SO_BINDTODEVICE. It is however small
1033 * and trivially backward compatible.
1034 */
1035static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1036{
1037 struct sock *sk = sock->sk;
1038 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
1039 ax25_dev *ax25_dev = NULL;
01d7dd0e
RB		 1040 ax25_uid_assoc *user;
1041 ax25_address call;
1da177e4
LT		 1042 ax25_cb *ax25;
1043 int err = 0;
1044
1045 if (addr_len != sizeof(struct sockaddr_ax25) &&
1987e7b4 1046 addr_len != sizeof(struct full_sockaddr_ax25))
1047 /* support for old structure may go away some time
1048 * ax25_bind(): uses old (6 digipeater) socket structure.
1049 */
1da177e4 1050 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1987e7b4 1051 (addr_len > sizeof(struct full_sockaddr_ax25)))
1da177e4 1052 return -EINVAL;
1da177e4
LT		 1053
1054 if (addr->fsa_ax25.sax25_family != AF_AX25)
1055 return -EINVAL;
1056
73400407 1057 user = ax25_findbyuid(current_euid());
01d7dd0e
RB		 1058 if (user) {
1059 call = user->call;
1060 ax25_uid_put(user);
1061 } else {
1062 if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
1063 return -EACCES;
1064
1065 call = addr->fsa_ax25.sax25_call;
1da177e4
LT		 1066 }
1067
1068 lock_sock(sk);
1069
1070 ax25 = ax25_sk(sk);
1071 if (!sock_flag(sk, SOCK_ZAPPED)) {
1072 err = -EINVAL;
1073 goto out;
1074 }
1075
01d7dd0e 1076 ax25->source_addr = call;
1da177e4
LT		 1077
1078 /*
1079 * User already set interface with SO_BINDTODEVICE
1080 */
1081 if (ax25->ax25_dev != NULL)
1082 goto done;
1083
1084 if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
1085 if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
1086 (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
1087 err = -EADDRNOTAVAIL;
1088 goto out;
1089 }
1090 } else {
1091 if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
1092 err = -EADDRNOTAVAIL;
1093 goto out;
1094 }
1095 }
1096
1097 if (ax25_dev != NULL)
1098 ax25_fillin_cb(ax25, ax25_dev);
1099
1100done:
1101 ax25_cb_add(ax25);
1102 sock_reset_flag(sk, SOCK_ZAPPED);
1103
1104out:
1105 release_sock(sk);
1106
49339cca 1107 return err;
1da177e4
LT		 1108}
1109
1110/*
1111 * FIXME: nonblock behaviour looks like it may have a bug.
1112 */
c9266b99
RB		 1113static int __must_check ax25_connect(struct socket *sock,
1114 struct sockaddr *uaddr, int addr_len, int flags)
1da177e4
LT		 1115{
1116 struct sock *sk = sock->sk;
1117 ax25_cb *ax25 = ax25_sk(sk), *ax25t;
1118 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1119 ax25_digi *digi = NULL;
1120 int ct = 0, err = 0;
1121
1122 /*
1123 * some sanity checks. code further down depends on this
1124 */
1125
27d1cba2 1126 if (addr_len == sizeof(struct sockaddr_ax25))
1127 /* support for this will go away in early 2.5.x
1128 * ax25_connect(): uses obsolete socket structure
1129 */
1130 ;
1131 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1132 /* support for old structure may go away some time
1133 * ax25_connect(): uses old (6 digipeater) socket structure.
1134 */
1da177e4 1135 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
27d1cba2 1136 (addr_len > sizeof(struct full_sockaddr_ax25)))
1da177e4 1137 return -EINVAL;
1da177e4 1138
1da177e4
LT		 1139
1140 if (fsa->fsa_ax25.sax25_family != AF_AX25)
1141 return -EINVAL;
1142
1143 lock_sock(sk);
1144
1145 /* deal with restarts */
1146 if (sock->state == SS_CONNECTING) {
1147 switch (sk->sk_state) {
1148 case TCP_SYN_SENT: /* still trying */
1149 err = -EINPROGRESS;
75606dc6 1150 goto out_release;
1da177e4
LT		 1151
1152 case TCP_ESTABLISHED: /* connection established */
1153 sock->state = SS_CONNECTED;
75606dc6 1154 goto out_release;
1da177e4
LT		 1155
1156 case TCP_CLOSE: /* connection refused */
1157 sock->state = SS_UNCONNECTED;
1158 err = -ECONNREFUSED;
75606dc6 1159 goto out_release;
1da177e4
LT		 1160 }
1161 }
1162
1163 if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
1164 err = -EISCONN; /* No reconnect on a seqpacket socket */
75606dc6 1165 goto out_release;
1da177e4
LT		 1166 }
1167
1168 sk->sk_state = TCP_CLOSE;
1169 sock->state = SS_UNCONNECTED;
1170
a51482bd
JJ		 1171 kfree(ax25->digipeat);
1172 ax25->digipeat = NULL;
1da177e4
LT		 1173
1174 /*
1175 * Handle digi-peaters to be used.
1176 */
1177 if (addr_len > sizeof(struct sockaddr_ax25) &&
1178 fsa->fsa_ax25.sax25_ndigis != 0) {
1179 /* Valid number of digipeaters ? */
1180 if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) {
1181 err = -EINVAL;
75606dc6 1182 goto out_release;
1da177e4
LT		 1183 }
1184
1185 if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
1186 err = -ENOBUFS;
75606dc6 1187 goto out_release;
1da177e4
LT		 1188 }
1189
1190 digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
1191 digi->lastrepeat = -1;
1192
1193 while (ct < fsa->fsa_ax25.sax25_ndigis) {
1194 if ((fsa->fsa_digipeater[ct].ax25_call[6] &
1195 AX25_HBIT) && ax25->iamdigi) {
1196 digi->repeated[ct] = 1;
1197 digi->lastrepeat = ct;
1198 } else {
1199 digi->repeated[ct] = 0;
1200 }
1201 digi->calls[ct] = fsa->fsa_digipeater[ct];
1202 ct++;
1203 }
1204 }
1205
1206 /*
1207 * Must bind first - autobinding in this may or may not work. If
1208 * the socket is already bound, check to see if the device has
1209 * been filled in, error if it hasn't.
1210 */
1211 if (sock_flag(sk, SOCK_ZAPPED)) {
1212 /* check if we can remove this feature. It is broken. */
1213 printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact [email protected]\n",
1214 current->comm);
1215 if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) {
1216 kfree(digi);
75606dc6 1217 goto out_release;
1da177e4
LT		 1218 }
1219
1220 ax25_fillin_cb(ax25, ax25->ax25_dev);
1221 ax25_cb_add(ax25);
1222 } else {
1223 if (ax25->ax25_dev == NULL) {
1224 kfree(digi);
1225 err = -EHOSTUNREACH;
75606dc6 1226 goto out_release;
1da177e4
LT		 1227 }
1228 }
1229
1230 if (sk->sk_type == SOCK_SEQPACKET &&
1231 (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
528930b9 1232 ax25->ax25_dev->dev))) {
1da177e4
LT		 1233 kfree(digi);
1234 err = -EADDRINUSE; /* Already such a connection */
1235 ax25_cb_put(ax25t);
75606dc6 1236 goto out_release;
1da177e4
LT		 1237 }
1238
1239 ax25->dest_addr = fsa->fsa_ax25.sax25_call;
1240 ax25->digipeat = digi;
1241
1242 /* First the easy one */
1243 if (sk->sk_type != SOCK_SEQPACKET) {
1244 sock->state = SS_CONNECTED;
1245 sk->sk_state = TCP_ESTABLISHED;
75606dc6 1246 goto out_release;
1da177e4
LT		 1247 }
1248
1249 /* Move to connecting socket, ax.25 lapb WAIT_UA.. */
1250 sock->state = SS_CONNECTING;
1251 sk->sk_state = TCP_SYN_SENT;
1252
1253 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1254 case AX25_PROTO_STD_SIMPLEX:
1255 case AX25_PROTO_STD_DUPLEX:
1256 ax25_std_establish_data_link(ax25);
1257 break;
1258
1259#ifdef CONFIG_AX25_DAMA_SLAVE
1260 case AX25_PROTO_DAMA_SLAVE:
1261 ax25->modulus = AX25_MODULUS;
1262 ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
1263 if (ax25->ax25_dev->dama.slave)
1264 ax25_ds_establish_data_link(ax25);
1265 else
1266 ax25_std_establish_data_link(ax25);
1267 break;
1268#endif
1269 }
1270
1271 ax25->state = AX25_STATE_1;
1272
1273 ax25_start_heartbeat(ax25);
1274
1275 /* Now the loop */
1276 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
1277 err = -EINPROGRESS;
75606dc6 1278 goto out_release;
1da177e4
LT		 1279 }
1280
1281 if (sk->sk_state == TCP_SYN_SENT) {
75606dc6 1282 DEFINE_WAIT(wait);
1da177e4 1283
1da177e4 1284 for (;;) {
aa395145 1285 prepare_to_wait(sk_sleep(sk), &wait,
bd3b071b 1286 TASK_INTERRUPTIBLE);
1da177e4
LT		 1287 if (sk->sk_state != TCP_SYN_SENT)
1288 break;
75606dc6
RB		 1289 if (!signal_pending(current)) {
1290 release_sock(sk);
1da177e4
LT		 1291 schedule();
1292 lock_sock(sk);
1293 continue;
1294 }
75606dc6
RB		 1295 err = -ERESTARTSYS;
1296 break;
1da177e4 1297 }
aa395145 1298 finish_wait(sk_sleep(sk), &wait);
75606dc6
RB		 1299
1300 if (err)
1301 goto out_release;
1da177e4
LT		 1302 }
1303
1304 if (sk->sk_state != TCP_ESTABLISHED) {
1305 /* Not in ABM, not in WAIT_UA -> failed */
1306 sock->state = SS_UNCONNECTED;
1307 err = sock_error(sk); /* Always set at this point */
75606dc6 1308 goto out_release;
1da177e4
LT		 1309 }
1310
1311 sock->state = SS_CONNECTED;
1312
75606dc6
RB		 1313 err = 0;
1314out_release:
1da177e4
LT		 1315 release_sock(sk);
1316
1317 return err;
1318}
1319
1da177e4
LT		 1320static int ax25_accept(struct socket *sock, struct socket *newsock, int flags)
1321{
1da177e4
LT		 1322 struct sk_buff *skb;
1323 struct sock *newsk;
75606dc6 1324 DEFINE_WAIT(wait);
1da177e4
LT		 1325 struct sock *sk;
1326 int err = 0;
1327
1328 if (sock->state != SS_UNCONNECTED)
1329 return -EINVAL;
1330
1331 if ((sk = sock->sk) == NULL)
1332 return -EINVAL;
1333
1334 lock_sock(sk);
1335 if (sk->sk_type != SOCK_SEQPACKET) {
1336 err = -EOPNOTSUPP;
1337 goto out;
1338 }
1339
1340 if (sk->sk_state != TCP_LISTEN) {
1341 err = -EINVAL;
1342 goto out;
1343 }
1344
1345 /*
1346 * The read queue this time is holding sockets ready to use
1347 * hooked into the SABM we saved
1348 */
1da177e4 1349 for (;;) {
aa395145 1350 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1da177e4
LT		 1351 skb = skb_dequeue(&sk->sk_receive_queue);
1352 if (skb)
1353 break;
1354
1da177e4 1355 if (flags & O_NONBLOCK) {
75606dc6
RB		 1356 err = -EWOULDBLOCK;
1357 break;
1da177e4 1358 }
75606dc6
RB		 1359 if (!signal_pending(current)) {
1360 release_sock(sk);
1da177e4
LT		 1361 schedule();
1362 lock_sock(sk);
1363 continue;
1364 }
75606dc6
RB		 1365 err = -ERESTARTSYS;
1366 break;
1da177e4 1367 }
aa395145 1368 finish_wait(sk_sleep(sk), &wait);
75606dc6
RB		 1369
1370 if (err)
1371 goto out;
1da177e4
LT		 1372
1373 newsk = skb->sk;
9375cb8a 1374 sock_graft(newsk, newsock);
1da177e4
LT		 1375
1376 /* Now attach up the new socket */
1377 kfree_skb(skb);
1378 sk->sk_ack_backlog--;
1da177e4
LT		 1379 newsock->state = SS_CONNECTED;
1380
1381out:
1382 release_sock(sk);
1383
1384 return err;
1385}
1386
1387static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
1388 int *uaddr_len, int peer)
1389{
1390 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1391 struct sock *sk = sock->sk;
1392 unsigned char ndigi, i;
1393 ax25_cb *ax25;
1394 int err = 0;
1395
5b919f83 1396 memset(fsa, 0, sizeof(*fsa));
1da177e4
LT		 1397 lock_sock(sk);
1398 ax25 = ax25_sk(sk);
1399
1400 if (peer != 0) {
1401 if (sk->sk_state != TCP_ESTABLISHED) {
1402 err = -ENOTCONN;
1403 goto out;
1404 }
1405
1406 fsa->fsa_ax25.sax25_family = AF_AX25;
1407 fsa->fsa_ax25.sax25_call = ax25->dest_addr;
1da177e4
LT		 1408
1409 if (ax25->digipeat != NULL) {
1410 ndigi = ax25->digipeat->ndigi;
1411 fsa->fsa_ax25.sax25_ndigis = ndigi;
1412 for (i = 0; i < ndigi; i++)
1413 fsa->fsa_digipeater[i] =
1414 ax25->digipeat->calls[i];
1415 }
1416 } else {
1417 fsa->fsa_ax25.sax25_family = AF_AX25;
1418 fsa->fsa_ax25.sax25_call = ax25->source_addr;
1419 fsa->fsa_ax25.sax25_ndigis = 1;
1420 if (ax25->ax25_dev != NULL) {
1421 memcpy(&fsa->fsa_digipeater[0],
1422 ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
1423 } else {
1424 fsa->fsa_digipeater[0] = null_ax25_address;
1425 }
1426 }
1427 *uaddr_len = sizeof (struct full_sockaddr_ax25);
1428
1429out:
1430 release_sock(sk);
1431
1432 return err;
1433}
1434
1b784140 1435static int ax25_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1da177e4 1436{
342dfc30 1437 DECLARE_SOCKADDR(struct sockaddr_ax25 *, usax, msg->msg_name);
1da177e4
LT		 1438 struct sock *sk = sock->sk;
1439 struct sockaddr_ax25 sax;
1440 struct sk_buff *skb;
1441 ax25_digi dtmp, *dp;
1da177e4
LT		 1442 ax25_cb *ax25;
1443 size_t size;
1444 int lv, err, addr_len = msg->msg_namelen;
1445
1446 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1447 return -EINVAL;
1448
1449 lock_sock(sk);
1450 ax25 = ax25_sk(sk);
1451
1452 if (sock_flag(sk, SOCK_ZAPPED)) {
1453 err = -EADDRNOTAVAIL;
1454 goto out;
1455 }
1456
1457 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1458 send_sig(SIGPIPE, current, 0);
1459 err = -EPIPE;
1460 goto out;
1461 }
1462
1463 if (ax25->ax25_dev == NULL) {
1464 err = -ENETUNREACH;
1465 goto out;
1466 }
1467
1468 if (len > ax25->ax25_dev->dev->mtu) {
1469 err = -EMSGSIZE;
1470 goto out;
1471 }
528930b9 1472
1da177e4
LT		 1473 if (usax != NULL) {
1474 if (usax->sax25_family != AF_AX25) {
1475 err = -EINVAL;
1476 goto out;
1477 }
1478
27d1cba2 1479 if (addr_len == sizeof(struct sockaddr_ax25))
1480 /* ax25_sendmsg(): uses obsolete socket structure */
1481 ;
1482 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1483 /* support for old structure may go away some time
1484 * ax25_sendmsg(): uses old (6 digipeater)
1485 * socket structure.
1486 */
1da177e4 1487 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
528930b9
YH		 1488 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1489 err = -EINVAL;
1da177e4
LT		 1490 goto out;
1491 }
1492
1da177e4
LT		 1493
1494 if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
1495 int ct = 0;
1496 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
1497
1498 /* Valid number of digipeaters ? */
1499 if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) {
1500 err = -EINVAL;
1501 goto out;
1502 }
1503
1504 dtmp.ndigi = usax->sax25_ndigis;
1505
1506 while (ct < usax->sax25_ndigis) {
1507 dtmp.repeated[ct] = 0;
1508 dtmp.calls[ct] = fsa->fsa_digipeater[ct];
1509 ct++;
1510 }
1511
1512 dtmp.lastrepeat = 0;
1513 }
1514
1515 sax = *usax;
1516 if (sk->sk_type == SOCK_SEQPACKET &&
1517 ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
1518 err = -EISCONN;
1519 goto out;
1520 }
1521 if (usax->sax25_ndigis == 0)
1522 dp = NULL;
1523 else
1524 dp = &dtmp;
1525 } else {
1526 /*
1527 * FIXME: 1003.1g - if the socket is like this because
1528 * it has become closed (not started closed) and is VC
1529 * we ought to SIGPIPE, EPIPE
1530 */
1531 if (sk->sk_state != TCP_ESTABLISHED) {
1532 err = -ENOTCONN;
1533 goto out;
1534 }
1535 sax.sax25_family = AF_AX25;
1536 sax.sax25_call = ax25->dest_addr;
1537 dp = ax25->digipeat;
1538 }
1539
1da177e4 1540 /* Build a packet */
1da177e4
LT		 1541 /* Assume the worst case */
1542 size = len + ax25->ax25_dev->dev->hard_header_len;
1543
1544 skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
1545 if (skb == NULL)
1546 goto out;
1547
1548 skb_reserve(skb, size - len);
1549
1da177e4 1550 /* User data follows immediately after the AX.25 data */
6ce8e9ce 1551 if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
1da177e4
LT		 1552 err = -EFAULT;
1553 kfree_skb(skb);
1554 goto out;
1555 }
1556
c1d2bbe1 1557 skb_reset_network_header(skb);
1da177e4
LT		 1558
1559 /* Add the PID if one is not supplied by the user in the skb */
967b05f6
ACM		 1560 if (!ax25->pidincl)
1561 *skb_push(skb, 1) = sk->sk_protocol;
1da177e4 1562
1da177e4
LT		 1563 if (sk->sk_type == SOCK_SEQPACKET) {
1564 /* Connected mode sockets go via the LAPB machine */
1565 if (sk->sk_state != TCP_ESTABLISHED) {
1566 kfree_skb(skb);
1567 err = -ENOTCONN;
1568 goto out;
1569 }
1570
1571 /* Shove it onto the queue and kick */
1572 ax25_output(ax25, ax25->paclen, skb);
1573
1574 err = len;
1575 goto out;
1576 }
1577
967b05f6 1578 skb_push(skb, 1 + ax25_addr_size(dp));
1da177e4 1579
8849b720 1580 /* Building AX.25 Header */
1da177e4
LT		 1581
1582 /* Build an AX.25 header */
967b05f6
ACM		 1583 lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
1584 dp, AX25_COMMAND, AX25_MODULUS);
1da177e4 1585
967b05f6 1586 skb_set_transport_header(skb, lv);
1da177e4 1587
9c70220b 1588 *skb_transport_header(skb) = AX25_UI;
1da177e4
LT		 1589
1590 /* Datagram frames go straight out of the door as UI */
29c4be51 1591 ax25_queue_xmit(skb, ax25->ax25_dev->dev);
1da177e4
LT		 1592
1593 err = len;
1594
1595out:
1596 release_sock(sk);
1597
1598 return err;
1599}
1600
1b784140
YX		 1601static int ax25_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1602 int flags)
1da177e4
LT		 1603{
1604 struct sock *sk = sock->sk;
1605 struct sk_buff *skb;
1606 int copied;
1607 int err = 0;
1608
1609 lock_sock(sk);
1610 /*
1611 * This works for seqpacket too. The receiver has ordered the
1612 * queue for us! We do one quick check first though
1613 */
1614 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
1615 err = -ENOTCONN;
1616 goto out;
1617 }
1618
1619 /* Now we can treat all alike */
1620 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
528930b9 1621 flags & MSG_DONTWAIT, &err);
1da177e4
LT		 1622 if (skb == NULL)
1623 goto out;
1624
1625 if (!ax25_sk(sk)->pidincl)
1626 skb_pull(skb, 1); /* Remove PID */
1627
badff6d0
ACM		 1628 skb_reset_transport_header(skb);
1629 copied = skb->len;
1da177e4
LT		 1630
1631 if (copied > size) {
1632 copied = size;
1633 msg->msg_flags |= MSG_TRUNC;
1634 }
1635
51f3d02b 1636 skb_copy_datagram_msg(skb, 0, msg, copied);
1da177e4 1637
f3d33426 1638 if (msg->msg_name) {
1da177e4
LT		 1639 ax25_digi digi;
1640 ax25_address src;
98e399f8 1641 const unsigned char *mac = skb_mac_header(skb);
342dfc30 1642 DECLARE_SOCKADDR(struct sockaddr_ax25 *, sax, msg->msg_name);
1da177e4 1643
ef3313e8 1644 memset(sax, 0, sizeof(struct full_sockaddr_ax25));
98e399f8
ACM		 1645 ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL,
1646 &digi, NULL, NULL);
1da177e4
LT		 1647 sax->sax25_family = AF_AX25;
1648 /* We set this correctly, even though we may not let the
1649 application know the digi calls further down (because it
1650 did NOT ask to know them). This could get political... **/
1651 sax->sax25_ndigis = digi.ndigi;
1652 sax->sax25_call = src;
1653
1654 if (sax->sax25_ndigis != 0) {
1655 int ct;
1656 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
1657
1658 for (ct = 0; ct < digi.ndigi; ct++)
1659 fsa->fsa_digipeater[ct] = digi.calls[ct];
1660 }
1661 msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
1662 }
1663
1664 skb_free_datagram(sk, skb);
1665 err = copied;
1666
1667out:
1668 release_sock(sk);
1669
1670 return err;
1671}
1672
1673static int ax25_shutdown(struct socket *sk, int how)
1674{
1675 /* FIXME - generate DM and RNR states */
1676 return -EOPNOTSUPP;
1677}
1678
1679static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1680{
1681 struct sock *sk = sock->sk;
1682 void __user *argp = (void __user *)arg;
1683 int res = 0;
1684
1685 lock_sock(sk);
1686 switch (cmd) {
1687 case TIOCOUTQ: {
1688 long amount;
31e6d363
ED		 1689
1690 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1da177e4
LT		 1691 if (amount < 0)
1692 amount = 0;
1693 res = put_user(amount, (int __user *)argp);
1694 break;
1695 }
1696
1697 case TIOCINQ: {
1698 struct sk_buff *skb;
1699 long amount = 0L;
1700 /* These two are safe on a single CPU system as only user tasks fiddle here */
1701 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1702 amount = skb->len;
20b7d10a 1703 res = put_user(amount, (int __user *) argp);
1da177e4
LT		 1704 break;
1705 }
1706
1707 case SIOCGSTAMP:
9b37ee75 1708 res = sock_get_timestamp(sk, argp);
1da177e4
LT		 1709 break;
1710
ae40eb1e
ED		 1711 case SIOCGSTAMPNS:
1712 res = sock_get_timestampns(sk, argp);
1713 break;
1714
1da177e4
LT		 1715 case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
1716 case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
1717 case SIOCAX25GETUID: {
1718 struct sockaddr_ax25 sax25;
1719 if (copy_from_user(&sax25, argp, sizeof(sax25))) {
1720 res = -EFAULT;
1721 break;
1722 }
1723 res = ax25_uid_ioctl(cmd, &sax25);
1724 break;
1725 }
1726
1727 case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
1728 long amount;
1729 if (!capable(CAP_NET_ADMIN)) {
1730 res = -EPERM;
1731 break;
1732 }
1733 if (get_user(amount, (long __user *)argp)) {
1734 res = -EFAULT;
1735 break;
1736 }
76887753 1737 if (amount < 0 || amount > AX25_NOUID_BLOCK) {
1da177e4
LT		 1738 res = -EINVAL;
1739 break;
1740 }
1741 ax25_uid_policy = amount;
1742 res = 0;
1743 break;
1744 }
1745
1746 case SIOCADDRT:
1747 case SIOCDELRT:
1748 case SIOCAX25OPTRT:
1749 if (!capable(CAP_NET_ADMIN)) {
1750 res = -EPERM;
1751 break;
1752 }
1753 res = ax25_rt_ioctl(cmd, argp);
1754 break;
1755
1756 case SIOCAX25CTLCON:
1757 if (!capable(CAP_NET_ADMIN)) {
1758 res = -EPERM;
1759 break;
1760 }
1761 res = ax25_ctl_ioctl(cmd, argp);
1762 break;
1763
1764 case SIOCAX25GETINFO:
1765 case SIOCAX25GETINFOOLD: {
1766 ax25_cb *ax25 = ax25_sk(sk);
1767 struct ax25_info_struct ax25_info;
1768
1769 ax25_info.t1 = ax25->t1 / HZ;
1770 ax25_info.t2 = ax25->t2 / HZ;
1771 ax25_info.t3 = ax25->t3 / HZ;
1772 ax25_info.idle = ax25->idle / (60 * HZ);
1773 ax25_info.n2 = ax25->n2;
1774 ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
1775 ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
1776 ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
1777 ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
1778 ax25_info.n2count = ax25->n2count;
1779 ax25_info.state = ax25->state;
407fc5cf
ED		 1780 ax25_info.rcv_q = sk_rmem_alloc_get(sk);
1781 ax25_info.snd_q = sk_wmem_alloc_get(sk);
1da177e4
LT		 1782 ax25_info.vs = ax25->vs;
1783 ax25_info.vr = ax25->vr;
1784 ax25_info.va = ax25->va;
1785 ax25_info.vs_max = ax25->vs; /* reserved */
1786 ax25_info.paclen = ax25->paclen;
1787 ax25_info.window = ax25->window;
1788
1789 /* old structure? */
1790 if (cmd == SIOCAX25GETINFOOLD) {
1791 static int warned = 0;
1792 if (!warned) {
1793 printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
1794 current->comm);
1795 warned=1;
1796 }
1797
1798 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
1799 res = -EFAULT;
1800 break;
1801 }
1802 } else {
1803 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
1804 res = -EINVAL;
1805 break;
1806 }
1807 }
1808 res = 0;
1809 break;
1810 }
1811
1812 case SIOCAX25ADDFWD:
1813 case SIOCAX25DELFWD: {
1814 struct ax25_fwd_struct ax25_fwd;
1815 if (!capable(CAP_NET_ADMIN)) {
1816 res = -EPERM;
1817 break;
1818 }
1819 if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
1820 res = -EFAULT;
1821 break;
1822 }
1823 res = ax25_fwd_ioctl(cmd, &ax25_fwd);
1824 break;
1825 }
1826
1827 case SIOCGIFADDR:
1828 case SIOCSIFADDR:
1829 case SIOCGIFDSTADDR:
1830 case SIOCSIFDSTADDR:
1831 case SIOCGIFBRDADDR:
1832 case SIOCSIFBRDADDR:
1833 case SIOCGIFNETMASK:
1834 case SIOCSIFNETMASK:
1835 case SIOCGIFMETRIC:
1836 case SIOCSIFMETRIC:
1837 res = -EINVAL;
1838 break;
1839
1840 default:
b5e5fa5e 1841 res = -ENOIOCTLCMD;
1da177e4
LT		 1842 break;
1843 }
1844 release_sock(sk);
1845
1846 return res;
1847}
1848
1849#ifdef CONFIG_PROC_FS
1850
1851static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
f16f3026 1852 __acquires(ax25_list_lock)
1da177e4 1853{
1da177e4 1854 spin_lock_bh(&ax25_list_lock);
b512f3d8 1855 return seq_hlist_start(&ax25_list, *pos);
1da177e4
LT		 1856}
1857
1858static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
1859{
b512f3d8 1860 return seq_hlist_next(v, &ax25_list, pos);
1da177e4 1861}
528930b9 1862
1da177e4 1863static void ax25_info_stop(struct seq_file *seq, void *v)
f16f3026 1864 __releases(ax25_list_lock)
1da177e4
LT		 1865{
1866 spin_unlock_bh(&ax25_list_lock);
1867}
1868
1869static int ax25_info_show(struct seq_file *seq, void *v)
1870{
b512f3d8 1871 ax25_cb *ax25 = hlist_entry(v, struct ax25_cb, ax25_node);
f75268cd 1872 char buf[11];
1da177e4
LT		 1873 int k;
1874
1875
1876 /*
1877 * New format:
1878 * 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
1879 */
1880
1881 seq_printf(seq, "%8.8lx %s %s%s ",
1882 (long) ax25,
1883 ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
f75268cd 1884 ax2asc(buf, &ax25->source_addr),
1da177e4 1885 ax25->iamdigi? "*":"");
f75268cd 1886 seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
1da177e4
LT		 1887
1888 for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
1889 seq_printf(seq, ",%s%s",
f75268cd 1890 ax2asc(buf, &ax25->digipeat->calls[k]),
1da177e4
LT		 1891 ax25->digipeat->repeated[k]? "*":"");
1892 }
1893
1894 seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
1895 ax25->state,
1896 ax25->vs, ax25->vr, ax25->va,
1897 ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
1898 ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
1899 ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
1900 ax25_display_timer(&ax25->idletimer) / (60 * HZ),
1901 ax25->idle / (60 * HZ),
1902 ax25->n2count, ax25->n2,
1903 ax25->rtt / HZ,
1904 ax25->window,
1905 ax25->paclen);
1906
1907 if (ax25->sk != NULL) {
1105b5d1 1908 seq_printf(seq, " %d %d %lu\n",
31e6d363
ED		 1909 sk_wmem_alloc_get(ax25->sk),
1910 sk_rmem_alloc_get(ax25->sk),
1105b5d1 1911 sock_i_ino(ax25->sk));
1da177e4
LT		 1912 } else {
1913 seq_puts(seq, " * * *\n");
1914 }
1915 return 0;
1916}
1917
56b3d975 1918static const struct seq_operations ax25_info_seqops = {
1da177e4
LT		 1919 .start = ax25_info_start,
1920 .next = ax25_info_next,
1921 .stop = ax25_info_stop,
1922 .show = ax25_info_show,
1923};
1924
1925static int ax25_info_open(struct inode *inode, struct file *file)
1926{
1927 return seq_open(file, &ax25_info_seqops);
1928}
1929
9a32144e 1930static const struct file_operations ax25_info_fops = {
1da177e4
LT		 1931 .owner = THIS_MODULE,
1932 .open = ax25_info_open,
1933 .read = seq_read,
1934 .llseek = seq_lseek,
1935 .release = seq_release,
1936};
1937
1938#endif
1939
ec1b4cf7 1940static const struct net_proto_family ax25_family_ops = {
1da177e4
LT		 1941 .family = PF_AX25,
1942 .create = ax25_create,
1943 .owner = THIS_MODULE,
1944};
1945
90ddc4f0 1946static const struct proto_ops ax25_proto_ops = {
4676356b
RB		 1947 .family = PF_AX25,
1948 .owner = THIS_MODULE,
1949 .release = ax25_release,
1950 .bind = ax25_bind,
1951 .connect = ax25_connect,
1952 .socketpair = sock_no_socketpair,
1953 .accept = ax25_accept,
1954 .getname = ax25_getname,
1955 .poll = datagram_poll,
1956 .ioctl = ax25_ioctl,
1957 .listen = ax25_listen,
1958 .shutdown = ax25_shutdown,
1959 .setsockopt = ax25_setsockopt,
1960 .getsockopt = ax25_getsockopt,
1961 .sendmsg = ax25_sendmsg,
1962 .recvmsg = ax25_recvmsg,
1963 .mmap = sock_no_mmap,
1964 .sendpage = sock_no_sendpage,
1da177e4
LT		 1965};
1966
1967/*
1968 * Called by socket.c on kernel start up
1969 */
7546dd97 1970static struct packet_type ax25_packet_type __read_mostly = {
09640e63 1971 .type = cpu_to_be16(ETH_P_AX25),
1da177e4
LT		 1972 .func = ax25_kiss_rcv,
1973};
1974
1975static struct notifier_block ax25_dev_notifier = {
351638e7 1976 .notifier_call = ax25_device_event,
1da177e4
LT		 1977};
1978
1da177e4
LT		 1979static int __init ax25_init(void)
1980{
1981 int rc = proto_register(&ax25_proto, 0);
1982
1983 if (rc != 0)
1984 goto out;
1985
1986 sock_register(&ax25_family_ops);
1987 dev_add_pack(&ax25_packet_type);
1988 register_netdevice_notifier(&ax25_dev_notifier);
1da177e4 1989
d4beaa66
G		 1990 proc_create("ax25_route", S_IRUGO, init_net.proc_net,
1991 &ax25_route_fops);
1992 proc_create("ax25", S_IRUGO, init_net.proc_net, &ax25_info_fops);
1993 proc_create("ax25_calls", S_IRUGO, init_net.proc_net, &ax25_uid_fops);
1da177e4
LT		 1994out:
1995 return rc;
1996}
1997module_init(ax25_init);
1998
1999
2000MODULE_AUTHOR("Jonathan Naylor G4KLX <[email protected]>");
2001MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
2002MODULE_LICENSE("GPL");
2003MODULE_ALIAS_NETPROTO(PF_AX25);
2004
2005static void __exit ax25_exit(void)
2006{
ece31ffd
G		 2007 remove_proc_entry("ax25_route", init_net.proc_net);
2008 remove_proc_entry("ax25", init_net.proc_net);
2009 remove_proc_entry("ax25_calls", init_net.proc_net);
1da177e4 2010
1da177e4
LT		 2011 unregister_netdevice_notifier(&ax25_dev_notifier);
2012
2013 dev_remove_pack(&ax25_packet_type);
2014
2015 sock_unregister(PF_AX25);
2016 proto_unregister(&ax25_proto);
3adadc08
EB		 2017
2018 ax25_rt_free();
2019 ax25_uid_free();
2020 ax25_dev_free();
1da177e4
LT		 2021}
2022module_exit(ax25_exit);
Empty description
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