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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
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2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 2/*
1da177e4
LT		 3 *
4 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
5 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
6 * Copyright (C) Darryl Miles G7LED (dlm@g7led.demon.co.uk)
7 * Copyright (C) Steven Whitehouse GW7RRM (stevew@acm.org)
8 * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
9 * Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de)
10 * Copyright (C) Hans Alblas PE1AYX (hans@esrac.ele.tue.nl)
11 * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
12 */
4fc268d2 13#include <linux/capability.h>
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/errno.h>
16#include <linux/types.h>
17#include <linux/socket.h>
18#include <linux/in.h>
19#include <linux/kernel.h>
3f07c014 20#include <linux/sched/signal.h>
1da177e4
LT		 21#include <linux/timer.h>
22#include <linux/string.h>
1da177e4
LT		 23#include <linux/sockios.h>
24#include <linux/net.h>
5a0e3ad6 25#include <linux/slab.h>
1da177e4
LT		 26#include <net/ax25.h>
27#include <linux/inet.h>
28#include <linux/netdevice.h>
29#include <linux/if_arp.h>
30#include <linux/skbuff.h>
31#include <net/sock.h>
7c0f6ba6 32#include <linux/uaccess.h>
1da177e4
LT		 33#include <linux/fcntl.h>
34#include <linux/termios.h> /* For TIOCINQ/OUTQ */
35#include <linux/mm.h>
36#include <linux/interrupt.h>
37#include <linux/notifier.h>
38#include <linux/proc_fs.h>
39#include <linux/stat.h>
1da177e4
LT		 40#include <linux/sysctl.h>
41#include <linux/init.h>
42#include <linux/spinlock.h>
457c4cbc 43#include <net/net_namespace.h>
c752f073 44#include <net/tcp_states.h>
1da177e4
LT		 45#include <net/ip.h>
46#include <net/arp.h>
47
48
49
50HLIST_HEAD(ax25_list);
51DEFINE_SPINLOCK(ax25_list_lock);
52
90ddc4f0 53static const struct proto_ops ax25_proto_ops;
1da177e4
LT		 54
55static void ax25_free_sock(struct sock *sk)
56{
3200392b 57 ax25_cb_put(sk_to_ax25(sk));
1da177e4
LT		 58}
59
60/*
61 * Socket removal during an interrupt is now safe.
62 */
63static void ax25_cb_del(ax25_cb *ax25)
64{
65 if (!hlist_unhashed(&ax25->ax25_node)) {
66 spin_lock_bh(&ax25_list_lock);
67 hlist_del_init(&ax25->ax25_node);
68 spin_unlock_bh(&ax25_list_lock);
69 ax25_cb_put(ax25);
70 }
71}
72
73/*
74 * Kill all bound sockets on a dropped device.
75 */
76static void ax25_kill_by_device(struct net_device *dev)
77{
78 ax25_dev *ax25_dev;
79 ax25_cb *s;
1da177e4
LT		 80
81 if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
82 return;
83
84 spin_lock_bh(&ax25_list_lock);
ecd2ebde 85again:
b67bfe0d 86 ax25_for_each(s, &ax25_list) {
1da177e4
LT		 87 if (s->ax25_dev == ax25_dev) {
88 s->ax25_dev = NULL;
ecd2ebde 89 spin_unlock_bh(&ax25_list_lock);
1da177e4 90 ax25_disconnect(s, ENETUNREACH);
ecd2ebde
JP		 91 spin_lock_bh(&ax25_list_lock);
92
93 /* The entry could have been deleted from the
94 * list meanwhile and thus the next pointer is
95 * no longer valid. Play it safe and restart
96 * the scan. Forward progress is ensured
97 * because we set s->ax25_dev to NULL and we
98 * are never passed a NULL 'dev' argument.
99 */
100 goto again;
1da177e4
LT		 101 }
102 }
103 spin_unlock_bh(&ax25_list_lock);
104}
105
106/*
107 * Handle device status changes.
108 */
109static int ax25_device_event(struct notifier_block *this, unsigned long event,
351638e7 110 void *ptr)
1da177e4 111{
351638e7 112 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1da177e4 113
721499e8 114 if (!net_eq(dev_net(dev), &init_net))
e9dc8653
EB		 115 return NOTIFY_DONE;
116
1da177e4
LT		 117 /* Reject non AX.25 devices */
118 if (dev->type != ARPHRD_AX25)
119 return NOTIFY_DONE;
120
121 switch (event) {
122 case NETDEV_UP:
123 ax25_dev_device_up(dev);
124 break;
125 case NETDEV_DOWN:
126 ax25_kill_by_device(dev);
127 ax25_rt_device_down(dev);
128 ax25_dev_device_down(dev);
129 break;
130 default:
131 break;
132 }
133
134 return NOTIFY_DONE;
135}
136
137/*
138 * Add a socket to the bound sockets list.
139 */
140void ax25_cb_add(ax25_cb *ax25)
141{
142 spin_lock_bh(&ax25_list_lock);
143 ax25_cb_hold(ax25);
144 hlist_add_head(&ax25->ax25_node, &ax25_list);
145 spin_unlock_bh(&ax25_list_lock);
146}
147
148/*
149 * Find a socket that wants to accept the SABM we have just
150 * received.
151 */
152struct sock *ax25_find_listener(ax25_address *addr, int digi,
153 struct net_device *dev, int type)
154{
155 ax25_cb *s;
1da177e4 156
c19c4b9c 157 spin_lock(&ax25_list_lock);
b67bfe0d 158 ax25_for_each(s, &ax25_list) {
1da177e4
LT		 159 if ((s->iamdigi && !digi) || (!s->iamdigi && digi))
160 continue;
161 if (s->sk && !ax25cmp(&s->source_addr, addr) &&
162 s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) {
163 /* If device is null we match any device */
164 if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) {
165 sock_hold(s->sk);
c19c4b9c 166 spin_unlock(&ax25_list_lock);
1da177e4
LT		 167 return s->sk;
168 }
169 }
170 }
c19c4b9c 171 spin_unlock(&ax25_list_lock);
1da177e4
LT		 172
173 return NULL;
174}
175
176/*
177 * Find an AX.25 socket given both ends.
178 */
179struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr,
180 int type)
181{
182 struct sock *sk = NULL;
183 ax25_cb *s;
1da177e4 184
c19c4b9c 185 spin_lock(&ax25_list_lock);
b67bfe0d 186 ax25_for_each(s, &ax25_list) {
1da177e4
LT		 187 if (s->sk && !ax25cmp(&s->source_addr, my_addr) &&
188 !ax25cmp(&s->dest_addr, dest_addr) &&
189 s->sk->sk_type == type) {
190 sk = s->sk;
191 sock_hold(sk);
192 break;
193 }
194 }
195
c19c4b9c 196 spin_unlock(&ax25_list_lock);
1da177e4
LT		 197
198 return sk;
199}
200
201/*
202 * Find an AX.25 control block given both ends. It will only pick up
203 * floating AX.25 control blocks or non Raw socket bound control blocks.
204 */
205ax25_cb *ax25_find_cb(ax25_address *src_addr, ax25_address *dest_addr,
206 ax25_digi *digi, struct net_device *dev)
207{
208 ax25_cb *s;
1da177e4
LT		 209
210 spin_lock_bh(&ax25_list_lock);
b67bfe0d 211 ax25_for_each(s, &ax25_list) {
1da177e4
LT		 212 if (s->sk && s->sk->sk_type != SOCK_SEQPACKET)
213 continue;
214 if (s->ax25_dev == NULL)
215 continue;
216 if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) {
217 if (digi != NULL && digi->ndigi != 0) {
218 if (s->digipeat == NULL)
219 continue;
220 if (ax25digicmp(s->digipeat, digi) != 0)
221 continue;
222 } else {
223 if (s->digipeat != NULL && s->digipeat->ndigi != 0)
224 continue;
225 }
226 ax25_cb_hold(s);
227 spin_unlock_bh(&ax25_list_lock);
228
229 return s;
230 }
231 }
232 spin_unlock_bh(&ax25_list_lock);
233
234 return NULL;
235}
236
70868eac
RB		 237EXPORT_SYMBOL(ax25_find_cb);
238
1da177e4
LT		 239void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto)
240{
241 ax25_cb *s;
242 struct sk_buff *copy;
1da177e4 243
c19c4b9c 244 spin_lock(&ax25_list_lock);
b67bfe0d 245 ax25_for_each(s, &ax25_list) {
1da177e4
LT		 246 if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 &&
247 s->sk->sk_type == SOCK_RAW &&
248 s->sk->sk_protocol == proto &&
249 s->ax25_dev->dev == skb->dev &&
250 atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) {
251 if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL)
252 continue;
253 if (sock_queue_rcv_skb(s->sk, copy) != 0)
254 kfree_skb(copy);
255 }
256 }
c19c4b9c 257 spin_unlock(&ax25_list_lock);
1da177e4
LT		 258}
259
260/*
261 * Deferred destroy.
262 */
263void ax25_destroy_socket(ax25_cb *);
264
265/*
266 * Handler for deferred kills.
267 */
8dbd05ff 268static void ax25_destroy_timer(struct timer_list *t)
1da177e4 269{
8dbd05ff 270 ax25_cb *ax25 = from_timer(ax25, t, dtimer);
1da177e4 271 struct sock *sk;
528930b9 272
1da177e4 273 sk=ax25->sk;
528930b9 274
1da177e4
LT		 275 bh_lock_sock(sk);
276 sock_hold(sk);
277 ax25_destroy_socket(ax25);
278 bh_unlock_sock(sk);
279 sock_put(sk);
280}
281
282/*
283 * This is called from user mode and the timers. Thus it protects itself
284 * against interrupt users but doesn't worry about being called during
285 * work. Once it is removed from the queue no interrupt or bottom half
286 * will touch it and we are (fairly 8-) ) safe.
287 */
288void ax25_destroy_socket(ax25_cb *ax25)
289{
290 struct sk_buff *skb;
291
292 ax25_cb_del(ax25);
293
294 ax25_stop_heartbeat(ax25);
295 ax25_stop_t1timer(ax25);
296 ax25_stop_t2timer(ax25);
297 ax25_stop_t3timer(ax25);
298 ax25_stop_idletimer(ax25);
299
300 ax25_clear_queues(ax25); /* Flush the queues */
301
302 if (ax25->sk != NULL) {
303 while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) {
304 if (skb->sk != ax25->sk) {
305 /* A pending connection */
3200392b 306 ax25_cb *sax25 = sk_to_ax25(skb->sk);
1da177e4
LT		 307
308 /* Queue the unaccepted socket for death */
309 sock_orphan(skb->sk);
310
33d1d2c5
DM		 311 /* 9A4GL: hack to release unaccepted sockets */
312 skb->sk->sk_state = TCP_LISTEN;
313
1da177e4
LT		 314 ax25_start_heartbeat(sax25);
315 sax25->state = AX25_STATE_0;
316 }
317
318 kfree_skb(skb);
319 }
320 skb_queue_purge(&ax25->sk->sk_write_queue);
321 }
322
323 if (ax25->sk != NULL) {
c564039f 324 if (sk_has_allocations(ax25->sk)) {
1da177e4 325 /* Defer: outstanding buffers */
8dbd05ff 326 timer_setup(&ax25->dtimer, ax25_destroy_timer, 0);
1da177e4 327 ax25->dtimer.expires = jiffies + 2 * HZ;
1da177e4
LT		 328 add_timer(&ax25->dtimer);
329 } else {
330 struct sock *sk=ax25->sk;
331 ax25->sk=NULL;
332 sock_put(sk);
333 }
334 } else {
335 ax25_cb_put(ax25);
336 }
337}
338
339/*
340 * dl1bke 960311: set parameters for existing AX.25 connections,
341 * includes a KILL command to abort any connection.
342 * VERY useful for debugging ;-)
343 */
344static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
345{
346 struct ax25_ctl_struct ax25_ctl;
347 ax25_digi digi;
348 ax25_dev *ax25_dev;
349 ax25_cb *ax25;
350 unsigned int k;
c0181d42 351 int ret = 0;
1da177e4
LT		 352
353 if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
354 return -EFAULT;
355
356 if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL)
357 return -ENODEV;
358
359 if (ax25_ctl.digi_count > AX25_MAX_DIGIS)
360 return -EINVAL;
361
43ab8502 362 if (ax25_ctl.arg > ULONG_MAX / HZ && ax25_ctl.cmd != AX25_KILL)
363 return -EINVAL;
364
1da177e4
LT		 365 digi.ndigi = ax25_ctl.digi_count;
366 for (k = 0; k < digi.ndigi; k++)
367 digi.calls[k] = ax25_ctl.digi_addr[k];
368
369 if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL)
370 return -ENOTCONN;
371
372 switch (ax25_ctl.cmd) {
373 case AX25_KILL:
374 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
375#ifdef CONFIG_AX25_DAMA_SLAVE
376 if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
377 ax25_dama_off(ax25);
378#endif
379 ax25_disconnect(ax25, ENETRESET);
380 break;
381
528930b9
YH		 382 case AX25_WINDOW:
383 if (ax25->modulus == AX25_MODULUS) {
384 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
c0181d42 385 goto einval_put;
528930b9
YH		 386 } else {
387 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
c0181d42 388 goto einval_put;
528930b9
YH		 389 }
390 ax25->window = ax25_ctl.arg;
391 break;
392
393 case AX25_T1:
be639ac6 394 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
c0181d42 395 goto einval_put;
528930b9
YH		 396 ax25->rtt = (ax25_ctl.arg * HZ) / 2;
397 ax25->t1 = ax25_ctl.arg * HZ;
398 break;
399
400 case AX25_T2:
be639ac6 401 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
c0181d42 402 goto einval_put;
528930b9
YH		 403 ax25->t2 = ax25_ctl.arg * HZ;
404 break;
405
406 case AX25_N2:
407 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
c0181d42 408 goto einval_put;
528930b9
YH		 409 ax25->n2count = 0;
410 ax25->n2 = ax25_ctl.arg;
411 break;
412
413 case AX25_T3:
be639ac6
RB		 414 if (ax25_ctl.arg > ULONG_MAX / HZ)
415 goto einval_put;
528930b9
YH		 416 ax25->t3 = ax25_ctl.arg * HZ;
417 break;
418
419 case AX25_IDLE:
be639ac6
RB		 420 if (ax25_ctl.arg > ULONG_MAX / (60 * HZ))
421 goto einval_put;
422
528930b9
YH		 423 ax25->idle = ax25_ctl.arg * 60 * HZ;
424 break;
425
426 case AX25_PACLEN:
427 if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
c0181d42 428 goto einval_put;
528930b9
YH		 429 ax25->paclen = ax25_ctl.arg;
430 break;
431
432 default:
c0181d42 433 goto einval_put;
1da177e4
LT		 434 }
435
c0181d42
JP		 436out_put:
437 ax25_cb_put(ax25);
438 return ret;
439
440einval_put:
441 ret = -EINVAL;
442 goto out_put;
1da177e4
LT		 443}
444
e1fdb5b3
RB		 445static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev)
446{
447 ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2;
448 ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]);
449 ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]);
450 ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]);
451 ax25->n2 = ax25_dev->values[AX25_VALUES_N2];
452 ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN];
453 ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]);
454 ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF];
455
456 if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) {
457 ax25->modulus = AX25_EMODULUS;
458 ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
459 } else {
460 ax25->modulus = AX25_MODULUS;
461 ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
462 }
463}
464
1da177e4
LT		 465/*
466 * Fill in a created AX.25 created control block with the default
467 * values for a particular device.
468 */
469void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev)
470{
471 ax25->ax25_dev = ax25_dev;
472
473 if (ax25->ax25_dev != NULL) {
e1fdb5b3
RB		 474 ax25_fillin_cb_from_dev(ax25, ax25_dev);
475 return;
476 }
477
478 /*
479 * No device, use kernel / AX.25 spec default values
480 */
481 ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2;
482 ax25->t1 = msecs_to_jiffies(AX25_DEF_T1);
483 ax25->t2 = msecs_to_jiffies(AX25_DEF_T2);
484 ax25->t3 = msecs_to_jiffies(AX25_DEF_T3);
485 ax25->n2 = AX25_DEF_N2;
486 ax25->paclen = AX25_DEF_PACLEN;
487 ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE);
488 ax25->backoff = AX25_DEF_BACKOFF;
489
490 if (AX25_DEF_AXDEFMODE) {
491 ax25->modulus = AX25_EMODULUS;
492 ax25->window = AX25_DEF_EWINDOW;
1da177e4 493 } else {
e1fdb5b3
RB		 494 ax25->modulus = AX25_MODULUS;
495 ax25->window = AX25_DEF_WINDOW;
1da177e4
LT		 496 }
497}
498
499/*
500 * Create an empty AX.25 control block.
501 */
502ax25_cb *ax25_create_cb(void)
503{
504 ax25_cb *ax25;
505
1b30dd35 506 if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL)
1da177e4
LT		 507 return NULL;
508
b6d52ede 509 refcount_set(&ax25->refcount, 1);
1da177e4
LT		 510
511 skb_queue_head_init(&ax25->write_queue);
512 skb_queue_head_init(&ax25->frag_queue);
513 skb_queue_head_init(&ax25->ack_queue);
514 skb_queue_head_init(&ax25->reseq_queue);
515
21fab4a8 516 ax25_setup_timers(ax25);
1da177e4
LT		 517
518 ax25_fillin_cb(ax25, NULL);
519
520 ax25->state = AX25_STATE_0;
521
522 return ax25;
523}
524
525/*
526 * Handling for system calls applied via the various interfaces to an
527 * AX25 socket object
528 */
529
530static int ax25_setsockopt(struct socket *sock, int level, int optname,
b7058842 531 char __user *optval, unsigned int optlen)
1da177e4
LT		 532{
533 struct sock *sk = sock->sk;
534 ax25_cb *ax25;
535 struct net_device *dev;
536 char devname[IFNAMSIZ];
ba1cffe0
XW		 537 unsigned long opt;
538 int res = 0;
1da177e4
LT		 539
540 if (level != SOL_AX25)
541 return -ENOPROTOOPT;
542
ba1cffe0 543 if (optlen < sizeof(unsigned int))
1da177e4
LT		 544 return -EINVAL;
545
ba1cffe0 546 if (get_user(opt, (unsigned int __user *)optval))
1da177e4
LT		 547 return -EFAULT;
548
549 lock_sock(sk);
3200392b 550 ax25 = sk_to_ax25(sk);
1da177e4
LT		 551
552 switch (optname) {
553 case AX25_WINDOW:
554 if (ax25->modulus == AX25_MODULUS) {
555 if (opt < 1 || opt > 7) {
556 res = -EINVAL;
557 break;
558 }
559 } else {
560 if (opt < 1 || opt > 63) {
561 res = -EINVAL;
562 break;
563 }
564 }
565 ax25->window = opt;
566 break;
567
568 case AX25_T1:
be639ac6 569 if (opt < 1 || opt > ULONG_MAX / HZ) {
1da177e4
LT		 570 res = -EINVAL;
571 break;
572 }
f16f3026 573 ax25->rtt = (opt * HZ) >> 1;
1da177e4
LT		 574 ax25->t1 = opt * HZ;
575 break;
576
577 case AX25_T2:
be639ac6 578 if (opt < 1 || opt > ULONG_MAX / HZ) {
1da177e4
LT		 579 res = -EINVAL;
580 break;
581 }
582 ax25->t2 = opt * HZ;
583 break;
584
585 case AX25_N2:
586 if (opt < 1 || opt > 31) {
587 res = -EINVAL;
588 break;
589 }
590 ax25->n2 = opt;
591 break;
592
593 case AX25_T3:
be639ac6 594 if (opt < 1 || opt > ULONG_MAX / HZ) {
1da177e4
LT		 595 res = -EINVAL;
596 break;
597 }
598 ax25->t3 = opt * HZ;
599 break;
600
601 case AX25_IDLE:
ba1cffe0 602 if (opt > ULONG_MAX / (60 * HZ)) {
1da177e4
LT		 603 res = -EINVAL;
604 break;
605 }
606 ax25->idle = opt * 60 * HZ;
607 break;
608
609 case AX25_BACKOFF:
ba1cffe0 610 if (opt > 2) {
1da177e4
LT		 611 res = -EINVAL;
612 break;
613 }
614 ax25->backoff = opt;
615 break;
616
617 case AX25_EXTSEQ:
618 ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
619 break;
620
621 case AX25_PIDINCL:
622 ax25->pidincl = opt ? 1 : 0;
623 break;
624
625 case AX25_IAMDIGI:
626 ax25->iamdigi = opt ? 1 : 0;
627 break;
628
629 case AX25_PACLEN:
630 if (opt < 16 || opt > 65535) {
631 res = -EINVAL;
632 break;
633 }
634 ax25->paclen = opt;
635 break;
636
637 case SO_BINDTODEVICE:
638 if (optlen > IFNAMSIZ)
2f72291d 639 optlen = IFNAMSIZ;
1da177e4 640
2f72291d
RB		 641 if (copy_from_user(devname, optval, optlen)) {
642 res = -EFAULT;
1da177e4
LT		 643 break;
644 }
645
646 if (sk->sk_type == SOCK_SEQPACKET &&
647 (sock->state != SS_UNCONNECTED ||
648 sk->sk_state == TCP_LISTEN)) {
649 res = -EADDRNOTAVAIL;
2f72291d
RB		 650 break;
651 }
652
c4335704
CW		 653 rtnl_lock();
654 dev = __dev_get_by_name(&init_net, devname);
2f72291d 655 if (!dev) {
c4335704 656 rtnl_unlock();
2f72291d 657 res = -ENODEV;
1da177e4
LT		 658 break;
659 }
660
661 ax25->ax25_dev = ax25_dev_ax25dev(dev);
c4335704
CW		 662 if (!ax25->ax25_dev) {
663 rtnl_unlock();
664 res = -ENODEV;
665 break;
666 }
1da177e4 667 ax25_fillin_cb(ax25, ax25->ax25_dev);
c4335704 668 rtnl_unlock();
1da177e4
LT		 669 break;
670
671 default:
672 res = -ENOPROTOOPT;
673 }
674 release_sock(sk);
675
676 return res;
677}
678
679static int ax25_getsockopt(struct socket *sock, int level, int optname,
680 char __user *optval, int __user *optlen)
681{
682 struct sock *sk = sock->sk;
683 ax25_cb *ax25;
684 struct ax25_dev *ax25_dev;
685 char devname[IFNAMSIZ];
686 void *valptr;
687 int val = 0;
688 int maxlen, length;
689
690 if (level != SOL_AX25)
691 return -ENOPROTOOPT;
692
693 if (get_user(maxlen, optlen))
694 return -EFAULT;
695
696 if (maxlen < 1)
697 return -EFAULT;
698
699 valptr = (void *) &val;
700 length = min_t(unsigned int, maxlen, sizeof(int));
701
702 lock_sock(sk);
3200392b 703 ax25 = sk_to_ax25(sk);
1da177e4
LT		 704
705 switch (optname) {
706 case AX25_WINDOW:
707 val = ax25->window;
708 break;
709
710 case AX25_T1:
711 val = ax25->t1 / HZ;
712 break;
713
714 case AX25_T2:
715 val = ax25->t2 / HZ;
716 break;
717
718 case AX25_N2:
719 val = ax25->n2;
720 break;
721
722 case AX25_T3:
723 val = ax25->t3 / HZ;
724 break;
725
726 case AX25_IDLE:
727 val = ax25->idle / (60 * HZ);
728 break;
729
730 case AX25_BACKOFF:
731 val = ax25->backoff;
732 break;
733
734 case AX25_EXTSEQ:
735 val = (ax25->modulus == AX25_EMODULUS);
736 break;
737
738 case AX25_PIDINCL:
739 val = ax25->pidincl;
740 break;
741
742 case AX25_IAMDIGI:
743 val = ax25->iamdigi;
744 break;
745
746 case AX25_PACLEN:
747 val = ax25->paclen;
748 break;
749
750 case SO_BINDTODEVICE:
751 ax25_dev = ax25->ax25_dev;
752
753 if (ax25_dev != NULL && ax25_dev->dev != NULL) {
754 strlcpy(devname, ax25_dev->dev->name, sizeof(devname));
755 length = strlen(devname) + 1;
756 } else {
757 *devname = '\0';
758 length = 1;
759 }
760
761 valptr = (void *) devname;
762 break;
763
764 default:
765 release_sock(sk);
766 return -ENOPROTOOPT;
767 }
768 release_sock(sk);
769
770 if (put_user(length, optlen))
771 return -EFAULT;
772
773 return copy_to_user(optval, valptr, length) ? -EFAULT : 0;
774}
775
776static int ax25_listen(struct socket *sock, int backlog)
777{
778 struct sock *sk = sock->sk;
779 int res = 0;
780
781 lock_sock(sk);
782 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) {
783 sk->sk_max_ack_backlog = backlog;
784 sk->sk_state = TCP_LISTEN;
785 goto out;
786 }
787 res = -EOPNOTSUPP;
788
789out:
790 release_sock(sk);
791
792 return res;
793}
794
795/*
796 * XXX: when creating ax25_sock we should update the .obj_size setting
797 * below.
798 */
799static struct proto ax25_proto = {
800 .name = "AX25",
801 .owner = THIS_MODULE,
3200392b 802 .obj_size = sizeof(struct ax25_sock),
1da177e4
LT		 803};
804
3f378b68
EP		 805static int ax25_create(struct net *net, struct socket *sock, int protocol,
806 int kern)
1da177e4
LT		 807{
808 struct sock *sk;
809 ax25_cb *ax25;
810
79462ad0
HFS		 811 if (protocol < 0 || protocol > SK_PROTOCOL_MAX)
812 return -EINVAL;
813
09ad9bc7 814 if (!net_eq(net, &init_net))
1b8d7ae4
EB		 815 return -EAFNOSUPPORT;
816
1da177e4
LT		 817 switch (sock->type) {
818 case SOCK_DGRAM:
819 if (protocol == 0 || protocol == PF_AX25)
820 protocol = AX25_P_TEXT;
821 break;
822
823 case SOCK_SEQPACKET:
824 switch (protocol) {
825 case 0:
826 case PF_AX25: /* For CLX */
827 protocol = AX25_P_TEXT;
828 break;
829 case AX25_P_SEGMENT:
830#ifdef CONFIG_INET
831 case AX25_P_ARP:
832 case AX25_P_IP:
833#endif
834#ifdef CONFIG_NETROM
835 case AX25_P_NETROM:
836#endif
837#ifdef CONFIG_ROSE
838 case AX25_P_ROSE:
839#endif
840 return -ESOCKTNOSUPPORT;
841#ifdef CONFIG_NETROM_MODULE
842 case AX25_P_NETROM:
843 if (ax25_protocol_is_registered(AX25_P_NETROM))
844 return -ESOCKTNOSUPPORT;
ef764a13 845 break;
1da177e4
LT		 846#endif
847#ifdef CONFIG_ROSE_MODULE
848 case AX25_P_ROSE:
849 if (ax25_protocol_is_registered(AX25_P_ROSE))
850 return -ESOCKTNOSUPPORT;
851#endif
852 default:
853 break;
854 }
855 break;
856
857 case SOCK_RAW:
858 break;
859 default:
860 return -ESOCKTNOSUPPORT;
861 }
862
11aa9c28 863 sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto, kern);
6257ff21 864 if (sk == NULL)
1da177e4
LT		 865 return -ENOMEM;
866
3200392b 867 ax25 = ax25_sk(sk)->cb = ax25_create_cb();
1da177e4
LT		 868 if (!ax25) {
869 sk_free(sk);
870 return -ENOMEM;
871 }
872
873 sock_init_data(sock, sk);
874
875 sk->sk_destruct = ax25_free_sock;
876 sock->ops = &ax25_proto_ops;
877 sk->sk_protocol = protocol;
878
879 ax25->sk = sk;
880
881 return 0;
882}
883
884struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
885{
886 struct sock *sk;
887 ax25_cb *ax25, *oax25;
888
11aa9c28 889 sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot, 0);
6257ff21 890 if (sk == NULL)
1da177e4
LT		 891 return NULL;
892
893 if ((ax25 = ax25_create_cb()) == NULL) {
894 sk_free(sk);
895 return NULL;
896 }
897
898 switch (osk->sk_type) {
899 case SOCK_DGRAM:
900 break;
901 case SOCK_SEQPACKET:
902 break;
903 default:
904 sk_free(sk);
905 ax25_cb_put(ax25);
906 return NULL;
907 }
908
909 sock_init_data(NULL, sk);
910
1da177e4 911 sk->sk_type = osk->sk_type;
1da177e4
LT		 912 sk->sk_priority = osk->sk_priority;
913 sk->sk_protocol = osk->sk_protocol;
914 sk->sk_rcvbuf = osk->sk_rcvbuf;
915 sk->sk_sndbuf = osk->sk_sndbuf;
916 sk->sk_state = TCP_ESTABLISHED;
53b924b3 917 sock_copy_flags(sk, osk);
1da177e4 918
3200392b 919 oax25 = sk_to_ax25(osk);
1da177e4
LT		 920
921 ax25->modulus = oax25->modulus;
922 ax25->backoff = oax25->backoff;
923 ax25->pidincl = oax25->pidincl;
924 ax25->iamdigi = oax25->iamdigi;
925 ax25->rtt = oax25->rtt;
926 ax25->t1 = oax25->t1;
927 ax25->t2 = oax25->t2;
928 ax25->t3 = oax25->t3;
929 ax25->n2 = oax25->n2;
930 ax25->idle = oax25->idle;
931 ax25->paclen = oax25->paclen;
932 ax25->window = oax25->window;
933
934 ax25->ax25_dev = ax25_dev;
935 ax25->source_addr = oax25->source_addr;
936
937 if (oax25->digipeat != NULL) {
0459d70a
ACM		 938 ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
939 GFP_ATOMIC);
940 if (ax25->digipeat == NULL) {
1da177e4
LT		 941 sk_free(sk);
942 ax25_cb_put(ax25);
943 return NULL;
944 }
1da177e4
LT		 945 }
946
3200392b 947 ax25_sk(sk)->cb = ax25;
8c185ab6 948 sk->sk_destruct = ax25_free_sock;
1da177e4
LT		 949 ax25->sk = sk;
950
951 return sk;
952}
953
954static int ax25_release(struct socket *sock)
955{
956 struct sock *sk = sock->sk;
957 ax25_cb *ax25;
958
959 if (sk == NULL)
960 return 0;
961
962 sock_hold(sk);
963 sock_orphan(sk);
964 lock_sock(sk);
3200392b 965 ax25 = sk_to_ax25(sk);
1da177e4
LT		 966
967 if (sk->sk_type == SOCK_SEQPACKET) {
968 switch (ax25->state) {
969 case AX25_STATE_0:
970 release_sock(sk);
971 ax25_disconnect(ax25, 0);
972 lock_sock(sk);
973 ax25_destroy_socket(ax25);
974 break;
975
976 case AX25_STATE_1:
977 case AX25_STATE_2:
978 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
979 release_sock(sk);
980 ax25_disconnect(ax25, 0);
981 lock_sock(sk);
4a7d99ea
BG		 982 if (!sock_flag(ax25->sk, SOCK_DESTROY))
983 ax25_destroy_socket(ax25);
1da177e4
LT		 984 break;
985
986 case AX25_STATE_3:
987 case AX25_STATE_4:
988 ax25_clear_queues(ax25);
989 ax25->n2count = 0;
990
991 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
992 case AX25_PROTO_STD_SIMPLEX:
993 case AX25_PROTO_STD_DUPLEX:
994 ax25_send_control(ax25,
995 AX25_DISC,
996 AX25_POLLON,
997 AX25_COMMAND);
998 ax25_stop_t2timer(ax25);
999 ax25_stop_t3timer(ax25);
1000 ax25_stop_idletimer(ax25);
1001 break;
1002#ifdef CONFIG_AX25_DAMA_SLAVE
1003 case AX25_PROTO_DAMA_SLAVE:
1004 ax25_stop_t3timer(ax25);
1005 ax25_stop_idletimer(ax25);
1006 break;
1007#endif
1008 }
1009 ax25_calculate_t1(ax25);
1010 ax25_start_t1timer(ax25);
1011 ax25->state = AX25_STATE_2;
1012 sk->sk_state = TCP_CLOSE;
1013 sk->sk_shutdown |= SEND_SHUTDOWN;
1014 sk->sk_state_change(sk);
1015 sock_set_flag(sk, SOCK_DESTROY);
1016 break;
1017
1018 default:
1019 break;
1020 }
1021 } else {
1022 sk->sk_state = TCP_CLOSE;
1023 sk->sk_shutdown |= SEND_SHUTDOWN;
1024 sk->sk_state_change(sk);
1025 ax25_destroy_socket(ax25);
1026 }
1027
1028 sock->sk = NULL;
1029 release_sock(sk);
1030 sock_put(sk);
1031
1032 return 0;
1033}
1034
1035/*
1036 * We support a funny extension here so you can (as root) give any callsign
1037 * digipeated via a local address as source. This hack is obsolete now
1038 * that we've implemented support for SO_BINDTODEVICE. It is however small
1039 * and trivially backward compatible.
1040 */
1041static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1042{
1043 struct sock *sk = sock->sk;
1044 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
1045 ax25_dev *ax25_dev = NULL;
01d7dd0e
RB		 1046 ax25_uid_assoc *user;
1047 ax25_address call;
1da177e4
LT		 1048 ax25_cb *ax25;
1049 int err = 0;
1050
1051 if (addr_len != sizeof(struct sockaddr_ax25) &&
1987e7b4 1052 addr_len != sizeof(struct full_sockaddr_ax25))
1053 /* support for old structure may go away some time
1054 * ax25_bind(): uses old (6 digipeater) socket structure.
1055 */
1da177e4 1056 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1987e7b4 1057 (addr_len > sizeof(struct full_sockaddr_ax25)))
1da177e4 1058 return -EINVAL;
1da177e4
LT		 1059
1060 if (addr->fsa_ax25.sax25_family != AF_AX25)
1061 return -EINVAL;
1062
73400407 1063 user = ax25_findbyuid(current_euid());
01d7dd0e
RB		 1064 if (user) {
1065 call = user->call;
1066 ax25_uid_put(user);
1067 } else {
1068 if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
1069 return -EACCES;
1070
1071 call = addr->fsa_ax25.sax25_call;
1da177e4
LT		 1072 }
1073
1074 lock_sock(sk);
1075
3200392b 1076 ax25 = sk_to_ax25(sk);
1da177e4
LT		 1077 if (!sock_flag(sk, SOCK_ZAPPED)) {
1078 err = -EINVAL;
1079 goto out;
1080 }
1081
01d7dd0e 1082 ax25->source_addr = call;
1da177e4
LT		 1083
1084 /*
1085 * User already set interface with SO_BINDTODEVICE
1086 */
1087 if (ax25->ax25_dev != NULL)
1088 goto done;
1089
1090 if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
1091 if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
1092 (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
1093 err = -EADDRNOTAVAIL;
1094 goto out;
1095 }
1096 } else {
1097 if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
1098 err = -EADDRNOTAVAIL;
1099 goto out;
1100 }
1101 }
1102
1103 if (ax25_dev != NULL)
1104 ax25_fillin_cb(ax25, ax25_dev);
1105
1106done:
1107 ax25_cb_add(ax25);
1108 sock_reset_flag(sk, SOCK_ZAPPED);
1109
1110out:
1111 release_sock(sk);
1112
49339cca 1113 return err;
1da177e4
LT		 1114}
1115
1116/*
1117 * FIXME: nonblock behaviour looks like it may have a bug.
1118 */
c9266b99
RB		 1119static int __must_check ax25_connect(struct socket *sock,
1120 struct sockaddr *uaddr, int addr_len, int flags)
1da177e4
LT		 1121{
1122 struct sock *sk = sock->sk;
3200392b 1123 ax25_cb *ax25 = sk_to_ax25(sk), *ax25t;
1da177e4
LT		 1124 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1125 ax25_digi *digi = NULL;
1126 int ct = 0, err = 0;
1127
1128 /*
1129 * some sanity checks. code further down depends on this
1130 */
1131
27d1cba2 1132 if (addr_len == sizeof(struct sockaddr_ax25))
1133 /* support for this will go away in early 2.5.x
1134 * ax25_connect(): uses obsolete socket structure
1135 */
1136 ;
1137 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1138 /* support for old structure may go away some time
1139 * ax25_connect(): uses old (6 digipeater) socket structure.
1140 */
1da177e4 1141 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
27d1cba2 1142 (addr_len > sizeof(struct full_sockaddr_ax25)))
1da177e4 1143 return -EINVAL;
1da177e4 1144
1da177e4
LT		 1145
1146 if (fsa->fsa_ax25.sax25_family != AF_AX25)
1147 return -EINVAL;
1148
1149 lock_sock(sk);
1150
1151 /* deal with restarts */
1152 if (sock->state == SS_CONNECTING) {
1153 switch (sk->sk_state) {
1154 case TCP_SYN_SENT: /* still trying */
1155 err = -EINPROGRESS;
75606dc6 1156 goto out_release;
1da177e4
LT		 1157
1158 case TCP_ESTABLISHED: /* connection established */
1159 sock->state = SS_CONNECTED;
75606dc6 1160 goto out_release;
1da177e4
LT		 1161
1162 case TCP_CLOSE: /* connection refused */
1163 sock->state = SS_UNCONNECTED;
1164 err = -ECONNREFUSED;
75606dc6 1165 goto out_release;
1da177e4
LT		 1166 }
1167 }
1168
1169 if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
1170 err = -EISCONN; /* No reconnect on a seqpacket socket */
75606dc6 1171 goto out_release;
1da177e4
LT		 1172 }
1173
1174 sk->sk_state = TCP_CLOSE;
1175 sock->state = SS_UNCONNECTED;
1176
a51482bd
JJ		 1177 kfree(ax25->digipeat);
1178 ax25->digipeat = NULL;
1da177e4
LT		 1179
1180 /*
1181 * Handle digi-peaters to be used.
1182 */
1183 if (addr_len > sizeof(struct sockaddr_ax25) &&
1184 fsa->fsa_ax25.sax25_ndigis != 0) {
1185 /* Valid number of digipeaters ? */
1186 if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) {
1187 err = -EINVAL;
75606dc6 1188 goto out_release;
1da177e4
LT		 1189 }
1190
1191 if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
1192 err = -ENOBUFS;
75606dc6 1193 goto out_release;
1da177e4
LT		 1194 }
1195
1196 digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
1197 digi->lastrepeat = -1;
1198
1199 while (ct < fsa->fsa_ax25.sax25_ndigis) {
1200 if ((fsa->fsa_digipeater[ct].ax25_call[6] &
1201 AX25_HBIT) && ax25->iamdigi) {
1202 digi->repeated[ct] = 1;
1203 digi->lastrepeat = ct;
1204 } else {
1205 digi->repeated[ct] = 0;
1206 }
1207 digi->calls[ct] = fsa->fsa_digipeater[ct];
1208 ct++;
1209 }
1210 }
1211
1212 /*
1213 * Must bind first - autobinding in this may or may not work. If
1214 * the socket is already bound, check to see if the device has
1215 * been filled in, error if it hasn't.
1216 */
1217 if (sock_flag(sk, SOCK_ZAPPED)) {
1218 /* check if we can remove this feature. It is broken. */
1219 printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n",
1220 current->comm);
1221 if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) {
1222 kfree(digi);
75606dc6 1223 goto out_release;
1da177e4
LT		 1224 }
1225
1226 ax25_fillin_cb(ax25, ax25->ax25_dev);
1227 ax25_cb_add(ax25);
1228 } else {
1229 if (ax25->ax25_dev == NULL) {
1230 kfree(digi);
1231 err = -EHOSTUNREACH;
75606dc6 1232 goto out_release;
1da177e4
LT		 1233 }
1234 }
1235
1236 if (sk->sk_type == SOCK_SEQPACKET &&
1237 (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
528930b9 1238 ax25->ax25_dev->dev))) {
1da177e4
LT		 1239 kfree(digi);
1240 err = -EADDRINUSE; /* Already such a connection */
1241 ax25_cb_put(ax25t);
75606dc6 1242 goto out_release;
1da177e4
LT		 1243 }
1244
1245 ax25->dest_addr = fsa->fsa_ax25.sax25_call;
1246 ax25->digipeat = digi;
1247
1248 /* First the easy one */
1249 if (sk->sk_type != SOCK_SEQPACKET) {
1250 sock->state = SS_CONNECTED;
1251 sk->sk_state = TCP_ESTABLISHED;
75606dc6 1252 goto out_release;
1da177e4
LT		 1253 }
1254
1255 /* Move to connecting socket, ax.25 lapb WAIT_UA.. */
1256 sock->state = SS_CONNECTING;
1257 sk->sk_state = TCP_SYN_SENT;
1258
1259 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1260 case AX25_PROTO_STD_SIMPLEX:
1261 case AX25_PROTO_STD_DUPLEX:
1262 ax25_std_establish_data_link(ax25);
1263 break;
1264
1265#ifdef CONFIG_AX25_DAMA_SLAVE
1266 case AX25_PROTO_DAMA_SLAVE:
1267 ax25->modulus = AX25_MODULUS;
1268 ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
1269 if (ax25->ax25_dev->dama.slave)
1270 ax25_ds_establish_data_link(ax25);
1271 else
1272 ax25_std_establish_data_link(ax25);
1273 break;
1274#endif
1275 }
1276
1277 ax25->state = AX25_STATE_1;
1278
1279 ax25_start_heartbeat(ax25);
1280
1281 /* Now the loop */
1282 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
1283 err = -EINPROGRESS;
75606dc6 1284 goto out_release;
1da177e4
LT		 1285 }
1286
1287 if (sk->sk_state == TCP_SYN_SENT) {
75606dc6 1288 DEFINE_WAIT(wait);
1da177e4 1289
1da177e4 1290 for (;;) {
aa395145 1291 prepare_to_wait(sk_sleep(sk), &wait,
bd3b071b 1292 TASK_INTERRUPTIBLE);
1da177e4
LT		 1293 if (sk->sk_state != TCP_SYN_SENT)
1294 break;
75606dc6
RB		 1295 if (!signal_pending(current)) {
1296 release_sock(sk);
1da177e4
LT		 1297 schedule();
1298 lock_sock(sk);
1299 continue;
1300 }
75606dc6
RB		 1301 err = -ERESTARTSYS;
1302 break;
1da177e4 1303 }
aa395145 1304 finish_wait(sk_sleep(sk), &wait);
75606dc6
RB		 1305
1306 if (err)
1307 goto out_release;
1da177e4
LT		 1308 }
1309
1310 if (sk->sk_state != TCP_ESTABLISHED) {
1311 /* Not in ABM, not in WAIT_UA -> failed */
1312 sock->state = SS_UNCONNECTED;
1313 err = sock_error(sk); /* Always set at this point */
75606dc6 1314 goto out_release;
1da177e4
LT		 1315 }
1316
1317 sock->state = SS_CONNECTED;
1318
75606dc6
RB		 1319 err = 0;
1320out_release:
1da177e4
LT		 1321 release_sock(sk);
1322
1323 return err;
1324}
1325
cdfbabfb
DH		 1326static int ax25_accept(struct socket *sock, struct socket *newsock, int flags,
1327 bool kern)
1da177e4 1328{
1da177e4
LT		 1329 struct sk_buff *skb;
1330 struct sock *newsk;
75606dc6 1331 DEFINE_WAIT(wait);
1da177e4
LT		 1332 struct sock *sk;
1333 int err = 0;
1334
1335 if (sock->state != SS_UNCONNECTED)
1336 return -EINVAL;
1337
1338 if ((sk = sock->sk) == NULL)
1339 return -EINVAL;
1340
1341 lock_sock(sk);
1342 if (sk->sk_type != SOCK_SEQPACKET) {
1343 err = -EOPNOTSUPP;
1344 goto out;
1345 }
1346
1347 if (sk->sk_state != TCP_LISTEN) {
1348 err = -EINVAL;
1349 goto out;
1350 }
1351
1352 /*
1353 * The read queue this time is holding sockets ready to use
1354 * hooked into the SABM we saved
1355 */
1da177e4 1356 for (;;) {
aa395145 1357 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1da177e4
LT		 1358 skb = skb_dequeue(&sk->sk_receive_queue);
1359 if (skb)
1360 break;
1361
1da177e4 1362 if (flags & O_NONBLOCK) {
75606dc6
RB		 1363 err = -EWOULDBLOCK;
1364 break;
1da177e4 1365 }
75606dc6
RB		 1366 if (!signal_pending(current)) {
1367 release_sock(sk);
1da177e4
LT		 1368 schedule();
1369 lock_sock(sk);
1370 continue;
1371 }
75606dc6
RB		 1372 err = -ERESTARTSYS;
1373 break;
1da177e4 1374 }
aa395145 1375 finish_wait(sk_sleep(sk), &wait);
75606dc6
RB		 1376
1377 if (err)
1378 goto out;
1da177e4
LT		 1379
1380 newsk = skb->sk;
9375cb8a 1381 sock_graft(newsk, newsock);
1da177e4
LT		 1382
1383 /* Now attach up the new socket */
1384 kfree_skb(skb);
1385 sk->sk_ack_backlog--;
1da177e4
LT		 1386 newsock->state = SS_CONNECTED;
1387
1388out:
1389 release_sock(sk);
1390
1391 return err;
1392}
1393
1394static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
9b2c45d4 1395 int peer)
1da177e4
LT		 1396{
1397 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1398 struct sock *sk = sock->sk;
1399 unsigned char ndigi, i;
1400 ax25_cb *ax25;
1401 int err = 0;
1402
5b919f83 1403 memset(fsa, 0, sizeof(*fsa));
1da177e4 1404 lock_sock(sk);
3200392b 1405 ax25 = sk_to_ax25(sk);
1da177e4
LT		 1406
1407 if (peer != 0) {
1408 if (sk->sk_state != TCP_ESTABLISHED) {
1409 err = -ENOTCONN;
1410 goto out;
1411 }
1412
1413 fsa->fsa_ax25.sax25_family = AF_AX25;
1414 fsa->fsa_ax25.sax25_call = ax25->dest_addr;
1da177e4
LT		 1415
1416 if (ax25->digipeat != NULL) {
1417 ndigi = ax25->digipeat->ndigi;
1418 fsa->fsa_ax25.sax25_ndigis = ndigi;
1419 for (i = 0; i < ndigi; i++)
1420 fsa->fsa_digipeater[i] =
1421 ax25->digipeat->calls[i];
1422 }
1423 } else {
1424 fsa->fsa_ax25.sax25_family = AF_AX25;
1425 fsa->fsa_ax25.sax25_call = ax25->source_addr;
1426 fsa->fsa_ax25.sax25_ndigis = 1;
1427 if (ax25->ax25_dev != NULL) {
1428 memcpy(&fsa->fsa_digipeater[0],
1429 ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
1430 } else {
1431 fsa->fsa_digipeater[0] = null_ax25_address;
1432 }
1433 }
9b2c45d4 1434 err = sizeof (struct full_sockaddr_ax25);
1da177e4
LT		 1435
1436out:
1437 release_sock(sk);
1438
1439 return err;
1440}
1441
1b784140 1442static int ax25_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1da177e4 1443{
342dfc30 1444 DECLARE_SOCKADDR(struct sockaddr_ax25 *, usax, msg->msg_name);
1da177e4
LT		 1445 struct sock *sk = sock->sk;
1446 struct sockaddr_ax25 sax;
1447 struct sk_buff *skb;
1448 ax25_digi dtmp, *dp;
1da177e4
LT		 1449 ax25_cb *ax25;
1450 size_t size;
1451 int lv, err, addr_len = msg->msg_namelen;
1452
1453 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1454 return -EINVAL;
1455
1456 lock_sock(sk);
3200392b 1457 ax25 = sk_to_ax25(sk);
1da177e4
LT		 1458
1459 if (sock_flag(sk, SOCK_ZAPPED)) {
1460 err = -EADDRNOTAVAIL;
1461 goto out;
1462 }
1463
1464 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1465 send_sig(SIGPIPE, current, 0);
1466 err = -EPIPE;
1467 goto out;
1468 }
1469
1470 if (ax25->ax25_dev == NULL) {
1471 err = -ENETUNREACH;
1472 goto out;
1473 }
1474
1475 if (len > ax25->ax25_dev->dev->mtu) {
1476 err = -EMSGSIZE;
1477 goto out;
1478 }
528930b9 1479
1da177e4
LT		 1480 if (usax != NULL) {
1481 if (usax->sax25_family != AF_AX25) {
1482 err = -EINVAL;
1483 goto out;
1484 }
1485
27d1cba2 1486 if (addr_len == sizeof(struct sockaddr_ax25))
1487 /* ax25_sendmsg(): uses obsolete socket structure */
1488 ;
1489 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1490 /* support for old structure may go away some time
1491 * ax25_sendmsg(): uses old (6 digipeater)
1492 * socket structure.
1493 */
1da177e4 1494 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
528930b9
YH		 1495 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1496 err = -EINVAL;
1da177e4
LT		 1497 goto out;
1498 }
1499
1da177e4
LT		 1500
1501 if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
1502 int ct = 0;
1503 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
1504
1505 /* Valid number of digipeaters ? */
1506 if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) {
1507 err = -EINVAL;
1508 goto out;
1509 }
1510
1511 dtmp.ndigi = usax->sax25_ndigis;
1512
1513 while (ct < usax->sax25_ndigis) {
1514 dtmp.repeated[ct] = 0;
1515 dtmp.calls[ct] = fsa->fsa_digipeater[ct];
1516 ct++;
1517 }
1518
1519 dtmp.lastrepeat = 0;
1520 }
1521
1522 sax = *usax;
1523 if (sk->sk_type == SOCK_SEQPACKET &&
1524 ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
1525 err = -EISCONN;
1526 goto out;
1527 }
1528 if (usax->sax25_ndigis == 0)
1529 dp = NULL;
1530 else
1531 dp = &dtmp;
1532 } else {
1533 /*
1534 * FIXME: 1003.1g - if the socket is like this because
1535 * it has become closed (not started closed) and is VC
1536 * we ought to SIGPIPE, EPIPE
1537 */
1538 if (sk->sk_state != TCP_ESTABLISHED) {
1539 err = -ENOTCONN;
1540 goto out;
1541 }
1542 sax.sax25_family = AF_AX25;
1543 sax.sax25_call = ax25->dest_addr;
1544 dp = ax25->digipeat;
1545 }
1546
1da177e4 1547 /* Build a packet */
1da177e4
LT		 1548 /* Assume the worst case */
1549 size = len + ax25->ax25_dev->dev->hard_header_len;
1550
1551 skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
1552 if (skb == NULL)
1553 goto out;
1554
1555 skb_reserve(skb, size - len);
1556
1da177e4 1557 /* User data follows immediately after the AX.25 data */
6ce8e9ce 1558 if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
1da177e4
LT		 1559 err = -EFAULT;
1560 kfree_skb(skb);
1561 goto out;
1562 }
1563
c1d2bbe1 1564 skb_reset_network_header(skb);
1da177e4
LT		 1565
1566 /* Add the PID if one is not supplied by the user in the skb */
967b05f6 1567 if (!ax25->pidincl)
d58ff351 1568 *(u8 *)skb_push(skb, 1) = sk->sk_protocol;
1da177e4 1569
1da177e4
LT		 1570 if (sk->sk_type == SOCK_SEQPACKET) {
1571 /* Connected mode sockets go via the LAPB machine */
1572 if (sk->sk_state != TCP_ESTABLISHED) {
1573 kfree_skb(skb);
1574 err = -ENOTCONN;
1575 goto out;
1576 }
1577
1578 /* Shove it onto the queue and kick */
1579 ax25_output(ax25, ax25->paclen, skb);
1580
1581 err = len;
1582 goto out;
1583 }
1584
967b05f6 1585 skb_push(skb, 1 + ax25_addr_size(dp));
1da177e4 1586
8849b720 1587 /* Building AX.25 Header */
1da177e4
LT		 1588
1589 /* Build an AX.25 header */
967b05f6
ACM		 1590 lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
1591 dp, AX25_COMMAND, AX25_MODULUS);
1da177e4 1592
967b05f6 1593 skb_set_transport_header(skb, lv);
1da177e4 1594
9c70220b 1595 *skb_transport_header(skb) = AX25_UI;
1da177e4
LT		 1596
1597 /* Datagram frames go straight out of the door as UI */
29c4be51 1598 ax25_queue_xmit(skb, ax25->ax25_dev->dev);
1da177e4
LT		 1599
1600 err = len;
1601
1602out:
1603 release_sock(sk);
1604
1605 return err;
1606}
1607
1b784140
YX		 1608static int ax25_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1609 int flags)
1da177e4
LT		 1610{
1611 struct sock *sk = sock->sk;
1612 struct sk_buff *skb;
1613 int copied;
1614 int err = 0;
1615
1616 lock_sock(sk);
1617 /*
1618 * This works for seqpacket too. The receiver has ordered the
1619 * queue for us! We do one quick check first though
1620 */
1621 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
1622 err = -ENOTCONN;
1623 goto out;
1624 }
1625
1626 /* Now we can treat all alike */
1627 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
528930b9 1628 flags & MSG_DONTWAIT, &err);
1da177e4
LT		 1629 if (skb == NULL)
1630 goto out;
1631
3200392b 1632 if (!sk_to_ax25(sk)->pidincl)
1da177e4
LT		 1633 skb_pull(skb, 1); /* Remove PID */
1634
badff6d0
ACM		 1635 skb_reset_transport_header(skb);
1636 copied = skb->len;
1da177e4
LT		 1637
1638 if (copied > size) {
1639 copied = size;
1640 msg->msg_flags |= MSG_TRUNC;
1641 }
1642
51f3d02b 1643 skb_copy_datagram_msg(skb, 0, msg, copied);
1da177e4 1644
f3d33426 1645 if (msg->msg_name) {
1da177e4
LT		 1646 ax25_digi digi;
1647 ax25_address src;
98e399f8 1648 const unsigned char *mac = skb_mac_header(skb);
342dfc30 1649 DECLARE_SOCKADDR(struct sockaddr_ax25 *, sax, msg->msg_name);
1da177e4 1650
ef3313e8 1651 memset(sax, 0, sizeof(struct full_sockaddr_ax25));
98e399f8
ACM		 1652 ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL,
1653 &digi, NULL, NULL);
1da177e4
LT		 1654 sax->sax25_family = AF_AX25;
1655 /* We set this correctly, even though we may not let the
1656 application know the digi calls further down (because it
1657 did NOT ask to know them). This could get political... **/
1658 sax->sax25_ndigis = digi.ndigi;
1659 sax->sax25_call = src;
1660
1661 if (sax->sax25_ndigis != 0) {
1662 int ct;
1663 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
1664
1665 for (ct = 0; ct < digi.ndigi; ct++)
1666 fsa->fsa_digipeater[ct] = digi.calls[ct];
1667 }
1668 msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
1669 }
1670
1671 skb_free_datagram(sk, skb);
1672 err = copied;
1673
1674out:
1675 release_sock(sk);
1676
1677 return err;
1678}
1679
1680static int ax25_shutdown(struct socket *sk, int how)
1681{
1682 /* FIXME - generate DM and RNR states */
1683 return -EOPNOTSUPP;
1684}
1685
1686static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1687{
1688 struct sock *sk = sock->sk;
1689 void __user *argp = (void __user *)arg;
1690 int res = 0;
1691
1692 lock_sock(sk);
1693 switch (cmd) {
1694 case TIOCOUTQ: {
1695 long amount;
31e6d363
ED		 1696
1697 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1da177e4
LT		 1698 if (amount < 0)
1699 amount = 0;
1700 res = put_user(amount, (int __user *)argp);
1701 break;
1702 }
1703
1704 case TIOCINQ: {
1705 struct sk_buff *skb;
1706 long amount = 0L;
1707 /* These two are safe on a single CPU system as only user tasks fiddle here */
1708 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1709 amount = skb->len;
20b7d10a 1710 res = put_user(amount, (int __user *) argp);
1da177e4
LT		 1711 break;
1712 }
1713
1da177e4
LT		 1714 case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
1715 case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
1716 case SIOCAX25GETUID: {
1717 struct sockaddr_ax25 sax25;
1718 if (copy_from_user(&sax25, argp, sizeof(sax25))) {
1719 res = -EFAULT;
1720 break;
1721 }
1722 res = ax25_uid_ioctl(cmd, &sax25);
1723 break;
1724 }
1725
1726 case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
1727 long amount;
1728 if (!capable(CAP_NET_ADMIN)) {
1729 res = -EPERM;
1730 break;
1731 }
1732 if (get_user(amount, (long __user *)argp)) {
1733 res = -EFAULT;
1734 break;
1735 }
76887753 1736 if (amount < 0 || amount > AX25_NOUID_BLOCK) {
1da177e4
LT		 1737 res = -EINVAL;
1738 break;
1739 }
1740 ax25_uid_policy = amount;
1741 res = 0;
1742 break;
1743 }
1744
1745 case SIOCADDRT:
1746 case SIOCDELRT:
1747 case SIOCAX25OPTRT:
1748 if (!capable(CAP_NET_ADMIN)) {
1749 res = -EPERM;
1750 break;
1751 }
1752 res = ax25_rt_ioctl(cmd, argp);
1753 break;
1754
1755 case SIOCAX25CTLCON:
1756 if (!capable(CAP_NET_ADMIN)) {
1757 res = -EPERM;
1758 break;
1759 }
1760 res = ax25_ctl_ioctl(cmd, argp);
1761 break;
1762
1763 case SIOCAX25GETINFO:
1764 case SIOCAX25GETINFOOLD: {
3200392b 1765 ax25_cb *ax25 = sk_to_ax25(sk);
1da177e4
LT		 1766 struct ax25_info_struct ax25_info;
1767
1768 ax25_info.t1 = ax25->t1 / HZ;
1769 ax25_info.t2 = ax25->t2 / HZ;
1770 ax25_info.t3 = ax25->t3 / HZ;
1771 ax25_info.idle = ax25->idle / (60 * HZ);
1772 ax25_info.n2 = ax25->n2;
1773 ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
1774 ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
1775 ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
1776 ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
1777 ax25_info.n2count = ax25->n2count;
1778 ax25_info.state = ax25->state;
407fc5cf
ED		 1779 ax25_info.rcv_q = sk_rmem_alloc_get(sk);
1780 ax25_info.snd_q = sk_wmem_alloc_get(sk);
1da177e4
LT		 1781 ax25_info.vs = ax25->vs;
1782 ax25_info.vr = ax25->vr;
1783 ax25_info.va = ax25->va;
1784 ax25_info.vs_max = ax25->vs; /* reserved */
1785 ax25_info.paclen = ax25->paclen;
1786 ax25_info.window = ax25->window;
1787
1788 /* old structure? */
1789 if (cmd == SIOCAX25GETINFOOLD) {
1790 static int warned = 0;
1791 if (!warned) {
1792 printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
1793 current->comm);
1794 warned=1;
1795 }
1796
1797 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
1798 res = -EFAULT;
1799 break;
1800 }
1801 } else {
1802 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
1803 res = -EINVAL;
1804 break;
1805 }
1806 }
1807 res = 0;
1808 break;
1809 }
1810
1811 case SIOCAX25ADDFWD:
1812 case SIOCAX25DELFWD: {
1813 struct ax25_fwd_struct ax25_fwd;
1814 if (!capable(CAP_NET_ADMIN)) {
1815 res = -EPERM;
1816 break;
1817 }
1818 if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
1819 res = -EFAULT;
1820 break;
1821 }
1822 res = ax25_fwd_ioctl(cmd, &ax25_fwd);
1823 break;
1824 }
1825
1826 case SIOCGIFADDR:
1827 case SIOCSIFADDR:
1828 case SIOCGIFDSTADDR:
1829 case SIOCSIFDSTADDR:
1830 case SIOCGIFBRDADDR:
1831 case SIOCSIFBRDADDR:
1832 case SIOCGIFNETMASK:
1833 case SIOCSIFNETMASK:
1834 case SIOCGIFMETRIC:
1835 case SIOCSIFMETRIC:
1836 res = -EINVAL;
1837 break;
1838
1839 default:
b5e5fa5e 1840 res = -ENOIOCTLCMD;
1da177e4
LT		 1841 break;
1842 }
1843 release_sock(sk);
1844
1845 return res;
1846}
1847
1848#ifdef CONFIG_PROC_FS
1849
1850static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
f16f3026 1851 __acquires(ax25_list_lock)
1da177e4 1852{
1da177e4 1853 spin_lock_bh(&ax25_list_lock);
b512f3d8 1854 return seq_hlist_start(&ax25_list, *pos);
1da177e4
LT		 1855}
1856
1857static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
1858{
b512f3d8 1859 return seq_hlist_next(v, &ax25_list, pos);
1da177e4 1860}
528930b9 1861
1da177e4 1862static void ax25_info_stop(struct seq_file *seq, void *v)
f16f3026 1863 __releases(ax25_list_lock)
1da177e4
LT		 1864{
1865 spin_unlock_bh(&ax25_list_lock);
1866}
1867
1868static int ax25_info_show(struct seq_file *seq, void *v)
1869{
b512f3d8 1870 ax25_cb *ax25 = hlist_entry(v, struct ax25_cb, ax25_node);
f75268cd 1871 char buf[11];
1da177e4
LT		 1872 int k;
1873
1874
1875 /*
1876 * New format:
1877 * magic dev src_addr dest_addr,digi1,digi2,.. st vs vr va t1 t1 t2 t2 t3 t3 idle idle n2 n2 rtt window paclen Snd-Q Rcv-Q inode
1878 */
1879
966cddef
FH		 1880 seq_printf(seq, "%p %s %s%s ",
1881 ax25,
1da177e4 1882 ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
f75268cd 1883 ax2asc(buf, &ax25->source_addr),
1da177e4 1884 ax25->iamdigi? "*":"");
f75268cd 1885 seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
1da177e4
LT		 1886
1887 for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
1888 seq_printf(seq, ",%s%s",
f75268cd 1889 ax2asc(buf, &ax25->digipeat->calls[k]),
1da177e4
LT		 1890 ax25->digipeat->repeated[k]? "*":"");
1891 }
1892
1893 seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
1894 ax25->state,
1895 ax25->vs, ax25->vr, ax25->va,
1896 ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
1897 ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
1898 ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
1899 ax25_display_timer(&ax25->idletimer) / (60 * HZ),
1900 ax25->idle / (60 * HZ),
1901 ax25->n2count, ax25->n2,
1902 ax25->rtt / HZ,
1903 ax25->window,
1904 ax25->paclen);
1905
1906 if (ax25->sk != NULL) {
1105b5d1 1907 seq_printf(seq, " %d %d %lu\n",
31e6d363
ED		 1908 sk_wmem_alloc_get(ax25->sk),
1909 sk_rmem_alloc_get(ax25->sk),
1105b5d1 1910 sock_i_ino(ax25->sk));
1da177e4
LT		 1911 } else {
1912 seq_puts(seq, " * * *\n");
1913 }
1914 return 0;
1915}
1916
56b3d975 1917static const struct seq_operations ax25_info_seqops = {
1da177e4
LT		 1918 .start = ax25_info_start,
1919 .next = ax25_info_next,
1920 .stop = ax25_info_stop,
1921 .show = ax25_info_show,
1922};
1da177e4
LT		 1923#endif
1924
ec1b4cf7 1925static const struct net_proto_family ax25_family_ops = {
1da177e4
LT		 1926 .family = PF_AX25,
1927 .create = ax25_create,
1928 .owner = THIS_MODULE,
1929};
1930
90ddc4f0 1931static const struct proto_ops ax25_proto_ops = {
4676356b
RB		 1932 .family = PF_AX25,
1933 .owner = THIS_MODULE,
1934 .release = ax25_release,
1935 .bind = ax25_bind,
1936 .connect = ax25_connect,
1937 .socketpair = sock_no_socketpair,
1938 .accept = ax25_accept,
1939 .getname = ax25_getname,
a11e1d43 1940 .poll = datagram_poll,
4676356b 1941 .ioctl = ax25_ioctl,
c7cbdbf2 1942 .gettstamp = sock_gettstamp,
4676356b
RB		 1943 .listen = ax25_listen,
1944 .shutdown = ax25_shutdown,
1945 .setsockopt = ax25_setsockopt,
1946 .getsockopt = ax25_getsockopt,
1947 .sendmsg = ax25_sendmsg,
1948 .recvmsg = ax25_recvmsg,
1949 .mmap = sock_no_mmap,
1950 .sendpage = sock_no_sendpage,
1da177e4
LT		 1951};
1952
1953/*
1954 * Called by socket.c on kernel start up
1955 */
7546dd97 1956static struct packet_type ax25_packet_type __read_mostly = {
09640e63 1957 .type = cpu_to_be16(ETH_P_AX25),
1da177e4
LT		 1958 .func = ax25_kiss_rcv,
1959};
1960
1961static struct notifier_block ax25_dev_notifier = {
351638e7 1962 .notifier_call = ax25_device_event,
1da177e4
LT		 1963};
1964
1da177e4
LT		 1965static int __init ax25_init(void)
1966{
1967 int rc = proto_register(&ax25_proto, 0);
1968
1969 if (rc != 0)
1970 goto out;
1971
1972 sock_register(&ax25_family_ops);
1973 dev_add_pack(&ax25_packet_type);
1974 register_netdevice_notifier(&ax25_dev_notifier);
1da177e4 1975
fddda2b7
CH		 1976 proc_create_seq("ax25_route", 0444, init_net.proc_net, &ax25_rt_seqops);
1977 proc_create_seq("ax25", 0444, init_net.proc_net, &ax25_info_seqops);
1978 proc_create_seq("ax25_calls", 0444, init_net.proc_net,
1979 &ax25_uid_seqops);
1da177e4
LT		 1980out:
1981 return rc;
1982}
1983module_init(ax25_init);
1984
1985
1986MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1987MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
1988MODULE_LICENSE("GPL");
1989MODULE_ALIAS_NETPROTO(PF_AX25);
1990
1991static void __exit ax25_exit(void)
1992{
ece31ffd
G		 1993 remove_proc_entry("ax25_route", init_net.proc_net);
1994 remove_proc_entry("ax25", init_net.proc_net);
1995 remove_proc_entry("ax25_calls", init_net.proc_net);
1da177e4 1996
1da177e4
LT		 1997 unregister_netdevice_notifier(&ax25_dev_notifier);
1998
1999 dev_remove_pack(&ax25_packet_type);
2000
2001 sock_unregister(PF_AX25);
2002 proto_unregister(&ax25_proto);
3adadc08
EB		 2003
2004 ax25_rt_free();
2005 ax25_uid_free();
2006 ax25_dev_free();
1da177e4
LT		 2007}
2008module_exit(ax25_exit);
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