Root/
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify |
3 | * it under the terms of the GNU General Public License as published by |
4 | * the Free Software Foundation; either version 2 of the License, or |
5 | * (at your option) any later version. |
6 | * |
7 | * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk) |
8 | * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) |
9 | * Copyright (C) Darryl Miles G7LED (dlm@g7led.demon.co.uk) |
10 | * Copyright (C) Steven Whitehouse GW7RRM (stevew@acm.org) |
11 | * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de) |
12 | * Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de) |
13 | * Copyright (C) Hans Alblas PE1AYX (hans@esrac.ele.tue.nl) |
14 | * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr) |
15 | */ |
16 | #include <linux/capability.h> |
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> |
26 | #include <linux/sockios.h> |
27 | #include <linux/net.h> |
28 | #include <linux/slab.h> |
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> |
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> |
47 | #include <net/net_namespace.h> |
48 | #include <net/tcp_states.h> |
49 | #include <net/ip.h> |
50 | #include <net/arp.h> |
51 | |
52 | |
53 | |
54 | HLIST_HEAD(ax25_list); |
55 | DEFINE_SPINLOCK(ax25_list_lock); |
56 | |
57 | static const struct proto_ops ax25_proto_ops; |
58 | |
59 | static 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 | */ |
67 | static 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 | */ |
80 | static void ax25_kill_by_device(struct net_device *dev) |
81 | { |
82 | ax25_dev *ax25_dev; |
83 | ax25_cb *s; |
84 | struct hlist_node *node; |
85 | |
86 | if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) |
87 | return; |
88 | |
89 | spin_lock_bh(&ax25_list_lock); |
90 | again: |
91 | ax25_for_each(s, node, &ax25_list) { |
92 | if (s->ax25_dev == ax25_dev) { |
93 | s->ax25_dev = NULL; |
94 | spin_unlock_bh(&ax25_list_lock); |
95 | ax25_disconnect(s, ENETUNREACH); |
96 | spin_lock_bh(&ax25_list_lock); |
97 | |
98 | /* The entry could have been deleted from the |
99 | * list meanwhile and thus the next pointer is |
100 | * no longer valid. Play it safe and restart |
101 | * the scan. Forward progress is ensured |
102 | * because we set s->ax25_dev to NULL and we |
103 | * are never passed a NULL 'dev' argument. |
104 | */ |
105 | goto again; |
106 | } |
107 | } |
108 | spin_unlock_bh(&ax25_list_lock); |
109 | } |
110 | |
111 | /* |
112 | * Handle device status changes. |
113 | */ |
114 | static int ax25_device_event(struct notifier_block *this, unsigned long event, |
115 | void *ptr) |
116 | { |
117 | struct net_device *dev = (struct net_device *)ptr; |
118 | |
119 | if (!net_eq(dev_net(dev), &init_net)) |
120 | return NOTIFY_DONE; |
121 | |
122 | /* Reject non AX.25 devices */ |
123 | if (dev->type != ARPHRD_AX25) |
124 | return NOTIFY_DONE; |
125 | |
126 | switch (event) { |
127 | case NETDEV_UP: |
128 | ax25_dev_device_up(dev); |
129 | break; |
130 | case NETDEV_DOWN: |
131 | ax25_kill_by_device(dev); |
132 | ax25_rt_device_down(dev); |
133 | ax25_dev_device_down(dev); |
134 | break; |
135 | default: |
136 | break; |
137 | } |
138 | |
139 | return NOTIFY_DONE; |
140 | } |
141 | |
142 | /* |
143 | * Add a socket to the bound sockets list. |
144 | */ |
145 | void ax25_cb_add(ax25_cb *ax25) |
146 | { |
147 | spin_lock_bh(&ax25_list_lock); |
148 | ax25_cb_hold(ax25); |
149 | hlist_add_head(&ax25->ax25_node, &ax25_list); |
150 | spin_unlock_bh(&ax25_list_lock); |
151 | } |
152 | |
153 | /* |
154 | * Find a socket that wants to accept the SABM we have just |
155 | * received. |
156 | */ |
157 | struct sock *ax25_find_listener(ax25_address *addr, int digi, |
158 | struct net_device *dev, int type) |
159 | { |
160 | ax25_cb *s; |
161 | struct hlist_node *node; |
162 | |
163 | spin_lock(&ax25_list_lock); |
164 | ax25_for_each(s, node, &ax25_list) { |
165 | if ((s->iamdigi && !digi) || (!s->iamdigi && digi)) |
166 | continue; |
167 | if (s->sk && !ax25cmp(&s->source_addr, addr) && |
168 | s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) { |
169 | /* If device is null we match any device */ |
170 | if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) { |
171 | sock_hold(s->sk); |
172 | spin_unlock(&ax25_list_lock); |
173 | return s->sk; |
174 | } |
175 | } |
176 | } |
177 | spin_unlock(&ax25_list_lock); |
178 | |
179 | return NULL; |
180 | } |
181 | |
182 | /* |
183 | * Find an AX.25 socket given both ends. |
184 | */ |
185 | struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr, |
186 | int type) |
187 | { |
188 | struct sock *sk = NULL; |
189 | ax25_cb *s; |
190 | struct hlist_node *node; |
191 | |
192 | spin_lock(&ax25_list_lock); |
193 | ax25_for_each(s, node, &ax25_list) { |
194 | if (s->sk && !ax25cmp(&s->source_addr, my_addr) && |
195 | !ax25cmp(&s->dest_addr, dest_addr) && |
196 | s->sk->sk_type == type) { |
197 | sk = s->sk; |
198 | sock_hold(sk); |
199 | break; |
200 | } |
201 | } |
202 | |
203 | spin_unlock(&ax25_list_lock); |
204 | |
205 | return sk; |
206 | } |
207 | |
208 | /* |
209 | * Find an AX.25 control block given both ends. It will only pick up |
210 | * floating AX.25 control blocks or non Raw socket bound control blocks. |
211 | */ |
212 | ax25_cb *ax25_find_cb(ax25_address *src_addr, ax25_address *dest_addr, |
213 | ax25_digi *digi, struct net_device *dev) |
214 | { |
215 | ax25_cb *s; |
216 | struct hlist_node *node; |
217 | |
218 | spin_lock_bh(&ax25_list_lock); |
219 | ax25_for_each(s, node, &ax25_list) { |
220 | if (s->sk && s->sk->sk_type != SOCK_SEQPACKET) |
221 | continue; |
222 | if (s->ax25_dev == NULL) |
223 | continue; |
224 | if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) { |
225 | if (digi != NULL && digi->ndigi != 0) { |
226 | if (s->digipeat == NULL) |
227 | continue; |
228 | if (ax25digicmp(s->digipeat, digi) != 0) |
229 | continue; |
230 | } else { |
231 | if (s->digipeat != NULL && s->digipeat->ndigi != 0) |
232 | continue; |
233 | } |
234 | ax25_cb_hold(s); |
235 | spin_unlock_bh(&ax25_list_lock); |
236 | |
237 | return s; |
238 | } |
239 | } |
240 | spin_unlock_bh(&ax25_list_lock); |
241 | |
242 | return NULL; |
243 | } |
244 | |
245 | EXPORT_SYMBOL(ax25_find_cb); |
246 | |
247 | void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto) |
248 | { |
249 | ax25_cb *s; |
250 | struct sk_buff *copy; |
251 | struct hlist_node *node; |
252 | |
253 | spin_lock(&ax25_list_lock); |
254 | ax25_for_each(s, node, &ax25_list) { |
255 | if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 && |
256 | s->sk->sk_type == SOCK_RAW && |
257 | s->sk->sk_protocol == proto && |
258 | s->ax25_dev->dev == skb->dev && |
259 | atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) { |
260 | if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL) |
261 | continue; |
262 | if (sock_queue_rcv_skb(s->sk, copy) != 0) |
263 | kfree_skb(copy); |
264 | } |
265 | } |
266 | spin_unlock(&ax25_list_lock); |
267 | } |
268 | |
269 | /* |
270 | * Deferred destroy. |
271 | */ |
272 | void ax25_destroy_socket(ax25_cb *); |
273 | |
274 | /* |
275 | * Handler for deferred kills. |
276 | */ |
277 | static void ax25_destroy_timer(unsigned long data) |
278 | { |
279 | ax25_cb *ax25=(ax25_cb *)data; |
280 | struct sock *sk; |
281 | |
282 | sk=ax25->sk; |
283 | |
284 | bh_lock_sock(sk); |
285 | sock_hold(sk); |
286 | ax25_destroy_socket(ax25); |
287 | bh_unlock_sock(sk); |
288 | sock_put(sk); |
289 | } |
290 | |
291 | /* |
292 | * This is called from user mode and the timers. Thus it protects itself |
293 | * against interrupt users but doesn't worry about being called during |
294 | * work. Once it is removed from the queue no interrupt or bottom half |
295 | * will touch it and we are (fairly 8-) ) safe. |
296 | */ |
297 | void ax25_destroy_socket(ax25_cb *ax25) |
298 | { |
299 | struct sk_buff *skb; |
300 | |
301 | ax25_cb_del(ax25); |
302 | |
303 | ax25_stop_heartbeat(ax25); |
304 | ax25_stop_t1timer(ax25); |
305 | ax25_stop_t2timer(ax25); |
306 | ax25_stop_t3timer(ax25); |
307 | ax25_stop_idletimer(ax25); |
308 | |
309 | ax25_clear_queues(ax25); /* Flush the queues */ |
310 | |
311 | if (ax25->sk != NULL) { |
312 | while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) { |
313 | if (skb->sk != ax25->sk) { |
314 | /* A pending connection */ |
315 | ax25_cb *sax25 = ax25_sk(skb->sk); |
316 | |
317 | /* Queue the unaccepted socket for death */ |
318 | sock_orphan(skb->sk); |
319 | |
320 | /* 9A4GL: hack to release unaccepted sockets */ |
321 | skb->sk->sk_state = TCP_LISTEN; |
322 | |
323 | ax25_start_heartbeat(sax25); |
324 | sax25->state = AX25_STATE_0; |
325 | } |
326 | |
327 | kfree_skb(skb); |
328 | } |
329 | skb_queue_purge(&ax25->sk->sk_write_queue); |
330 | } |
331 | |
332 | if (ax25->sk != NULL) { |
333 | if (sk_has_allocations(ax25->sk)) { |
334 | /* Defer: outstanding buffers */ |
335 | setup_timer(&ax25->dtimer, ax25_destroy_timer, |
336 | (unsigned long)ax25); |
337 | ax25->dtimer.expires = jiffies + 2 * HZ; |
338 | add_timer(&ax25->dtimer); |
339 | } else { |
340 | struct sock *sk=ax25->sk; |
341 | ax25->sk=NULL; |
342 | sock_put(sk); |
343 | } |
344 | } else { |
345 | ax25_cb_put(ax25); |
346 | } |
347 | } |
348 | |
349 | /* |
350 | * dl1bke 960311: set parameters for existing AX.25 connections, |
351 | * includes a KILL command to abort any connection. |
352 | * VERY useful for debugging ;-) |
353 | */ |
354 | static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg) |
355 | { |
356 | struct ax25_ctl_struct ax25_ctl; |
357 | ax25_digi digi; |
358 | ax25_dev *ax25_dev; |
359 | ax25_cb *ax25; |
360 | unsigned int k; |
361 | int ret = 0; |
362 | |
363 | if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl))) |
364 | return -EFAULT; |
365 | |
366 | if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL) |
367 | return -ENODEV; |
368 | |
369 | if (ax25_ctl.digi_count > AX25_MAX_DIGIS) |
370 | return -EINVAL; |
371 | |
372 | if (ax25_ctl.arg > ULONG_MAX / HZ && ax25_ctl.cmd != AX25_KILL) |
373 | return -EINVAL; |
374 | |
375 | digi.ndigi = ax25_ctl.digi_count; |
376 | for (k = 0; k < digi.ndigi; k++) |
377 | digi.calls[k] = ax25_ctl.digi_addr[k]; |
378 | |
379 | if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL) |
380 | return -ENOTCONN; |
381 | |
382 | switch (ax25_ctl.cmd) { |
383 | case AX25_KILL: |
384 | ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND); |
385 | #ifdef CONFIG_AX25_DAMA_SLAVE |
386 | if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE) |
387 | ax25_dama_off(ax25); |
388 | #endif |
389 | ax25_disconnect(ax25, ENETRESET); |
390 | break; |
391 | |
392 | case AX25_WINDOW: |
393 | if (ax25->modulus == AX25_MODULUS) { |
394 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7) |
395 | goto einval_put; |
396 | } else { |
397 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63) |
398 | goto einval_put; |
399 | } |
400 | ax25->window = ax25_ctl.arg; |
401 | break; |
402 | |
403 | case AX25_T1: |
404 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ) |
405 | goto einval_put; |
406 | ax25->rtt = (ax25_ctl.arg * HZ) / 2; |
407 | ax25->t1 = ax25_ctl.arg * HZ; |
408 | break; |
409 | |
410 | case AX25_T2: |
411 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ) |
412 | goto einval_put; |
413 | ax25->t2 = ax25_ctl.arg * HZ; |
414 | break; |
415 | |
416 | case AX25_N2: |
417 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31) |
418 | goto einval_put; |
419 | ax25->n2count = 0; |
420 | ax25->n2 = ax25_ctl.arg; |
421 | break; |
422 | |
423 | case AX25_T3: |
424 | if (ax25_ctl.arg > ULONG_MAX / HZ) |
425 | goto einval_put; |
426 | ax25->t3 = ax25_ctl.arg * HZ; |
427 | break; |
428 | |
429 | case AX25_IDLE: |
430 | if (ax25_ctl.arg > ULONG_MAX / (60 * HZ)) |
431 | goto einval_put; |
432 | |
433 | ax25->idle = ax25_ctl.arg * 60 * HZ; |
434 | break; |
435 | |
436 | case AX25_PACLEN: |
437 | if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535) |
438 | goto einval_put; |
439 | ax25->paclen = ax25_ctl.arg; |
440 | break; |
441 | |
442 | default: |
443 | goto einval_put; |
444 | } |
445 | |
446 | out_put: |
447 | ax25_cb_put(ax25); |
448 | return ret; |
449 | |
450 | einval_put: |
451 | ret = -EINVAL; |
452 | goto out_put; |
453 | } |
454 | |
455 | static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev) |
456 | { |
457 | ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2; |
458 | ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]); |
459 | ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]); |
460 | ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]); |
461 | ax25->n2 = ax25_dev->values[AX25_VALUES_N2]; |
462 | ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN]; |
463 | ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]); |
464 | ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF]; |
465 | |
466 | if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) { |
467 | ax25->modulus = AX25_EMODULUS; |
468 | ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW]; |
469 | } else { |
470 | ax25->modulus = AX25_MODULUS; |
471 | ax25->window = ax25_dev->values[AX25_VALUES_WINDOW]; |
472 | } |
473 | } |
474 | |
475 | /* |
476 | * Fill in a created AX.25 created control block with the default |
477 | * values for a particular device. |
478 | */ |
479 | void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev) |
480 | { |
481 | ax25->ax25_dev = ax25_dev; |
482 | |
483 | if (ax25->ax25_dev != NULL) { |
484 | ax25_fillin_cb_from_dev(ax25, ax25_dev); |
485 | return; |
486 | } |
487 | |
488 | /* |
489 | * No device, use kernel / AX.25 spec default values |
490 | */ |
491 | ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2; |
492 | ax25->t1 = msecs_to_jiffies(AX25_DEF_T1); |
493 | ax25->t2 = msecs_to_jiffies(AX25_DEF_T2); |
494 | ax25->t3 = msecs_to_jiffies(AX25_DEF_T3); |
495 | ax25->n2 = AX25_DEF_N2; |
496 | ax25->paclen = AX25_DEF_PACLEN; |
497 | ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE); |
498 | ax25->backoff = AX25_DEF_BACKOFF; |
499 | |
500 | if (AX25_DEF_AXDEFMODE) { |
501 | ax25->modulus = AX25_EMODULUS; |
502 | ax25->window = AX25_DEF_EWINDOW; |
503 | } else { |
504 | ax25->modulus = AX25_MODULUS; |
505 | ax25->window = AX25_DEF_WINDOW; |
506 | } |
507 | } |
508 | |
509 | /* |
510 | * Create an empty AX.25 control block. |
511 | */ |
512 | ax25_cb *ax25_create_cb(void) |
513 | { |
514 | ax25_cb *ax25; |
515 | |
516 | if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL) |
517 | return NULL; |
518 | |
519 | atomic_set(&ax25->refcount, 1); |
520 | |
521 | skb_queue_head_init(&ax25->write_queue); |
522 | skb_queue_head_init(&ax25->frag_queue); |
523 | skb_queue_head_init(&ax25->ack_queue); |
524 | skb_queue_head_init(&ax25->reseq_queue); |
525 | |
526 | ax25_setup_timers(ax25); |
527 | |
528 | ax25_fillin_cb(ax25, NULL); |
529 | |
530 | ax25->state = AX25_STATE_0; |
531 | |
532 | return ax25; |
533 | } |
534 | |
535 | /* |
536 | * Handling for system calls applied via the various interfaces to an |
537 | * AX25 socket object |
538 | */ |
539 | |
540 | static int ax25_setsockopt(struct socket *sock, int level, int optname, |
541 | char __user *optval, unsigned int optlen) |
542 | { |
543 | struct sock *sk = sock->sk; |
544 | ax25_cb *ax25; |
545 | struct net_device *dev; |
546 | char devname[IFNAMSIZ]; |
547 | unsigned long opt; |
548 | int res = 0; |
549 | |
550 | if (level != SOL_AX25) |
551 | return -ENOPROTOOPT; |
552 | |
553 | if (optlen < sizeof(unsigned int)) |
554 | return -EINVAL; |
555 | |
556 | if (get_user(opt, (unsigned int __user *)optval)) |
557 | return -EFAULT; |
558 | |
559 | lock_sock(sk); |
560 | ax25 = ax25_sk(sk); |
561 | |
562 | switch (optname) { |
563 | case AX25_WINDOW: |
564 | if (ax25->modulus == AX25_MODULUS) { |
565 | if (opt < 1 || opt > 7) { |
566 | res = -EINVAL; |
567 | break; |
568 | } |
569 | } else { |
570 | if (opt < 1 || opt > 63) { |
571 | res = -EINVAL; |
572 | break; |
573 | } |
574 | } |
575 | ax25->window = opt; |
576 | break; |
577 | |
578 | case AX25_T1: |
579 | if (opt < 1 || opt > ULONG_MAX / HZ) { |
580 | res = -EINVAL; |
581 | break; |
582 | } |
583 | ax25->rtt = (opt * HZ) >> 1; |
584 | ax25->t1 = opt * HZ; |
585 | break; |
586 | |
587 | case AX25_T2: |
588 | if (opt < 1 || opt > ULONG_MAX / HZ) { |
589 | res = -EINVAL; |
590 | break; |
591 | } |
592 | ax25->t2 = opt * HZ; |
593 | break; |
594 | |
595 | case AX25_N2: |
596 | if (opt < 1 || opt > 31) { |
597 | res = -EINVAL; |
598 | break; |
599 | } |
600 | ax25->n2 = opt; |
601 | break; |
602 | |
603 | case AX25_T3: |
604 | if (opt < 1 || opt > ULONG_MAX / HZ) { |
605 | res = -EINVAL; |
606 | break; |
607 | } |
608 | ax25->t3 = opt * HZ; |
609 | break; |
610 | |
611 | case AX25_IDLE: |
612 | if (opt > ULONG_MAX / (60 * HZ)) { |
613 | res = -EINVAL; |
614 | break; |
615 | } |
616 | ax25->idle = opt * 60 * HZ; |
617 | break; |
618 | |
619 | case AX25_BACKOFF: |
620 | if (opt > 2) { |
621 | res = -EINVAL; |
622 | break; |
623 | } |
624 | ax25->backoff = opt; |
625 | break; |
626 | |
627 | case AX25_EXTSEQ: |
628 | ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS; |
629 | break; |
630 | |
631 | case AX25_PIDINCL: |
632 | ax25->pidincl = opt ? 1 : 0; |
633 | break; |
634 | |
635 | case AX25_IAMDIGI: |
636 | ax25->iamdigi = opt ? 1 : 0; |
637 | break; |
638 | |
639 | case AX25_PACLEN: |
640 | if (opt < 16 || opt > 65535) { |
641 | res = -EINVAL; |
642 | break; |
643 | } |
644 | ax25->paclen = opt; |
645 | break; |
646 | |
647 | case SO_BINDTODEVICE: |
648 | if (optlen > IFNAMSIZ) |
649 | optlen = IFNAMSIZ; |
650 | |
651 | if (copy_from_user(devname, optval, optlen)) { |
652 | res = -EFAULT; |
653 | break; |
654 | } |
655 | |
656 | if (sk->sk_type == SOCK_SEQPACKET && |
657 | (sock->state != SS_UNCONNECTED || |
658 | sk->sk_state == TCP_LISTEN)) { |
659 | res = -EADDRNOTAVAIL; |
660 | break; |
661 | } |
662 | |
663 | dev = dev_get_by_name(&init_net, devname); |
664 | if (!dev) { |
665 | res = -ENODEV; |
666 | break; |
667 | } |
668 | |
669 | ax25->ax25_dev = ax25_dev_ax25dev(dev); |
670 | ax25_fillin_cb(ax25, ax25->ax25_dev); |
671 | dev_put(dev); |
672 | break; |
673 | |
674 | default: |
675 | res = -ENOPROTOOPT; |
676 | } |
677 | release_sock(sk); |
678 | |
679 | return res; |
680 | } |
681 | |
682 | static int ax25_getsockopt(struct socket *sock, int level, int optname, |
683 | char __user *optval, int __user *optlen) |
684 | { |
685 | struct sock *sk = sock->sk; |
686 | ax25_cb *ax25; |
687 | struct ax25_dev *ax25_dev; |
688 | char devname[IFNAMSIZ]; |
689 | void *valptr; |
690 | int val = 0; |
691 | int maxlen, length; |
692 | |
693 | if (level != SOL_AX25) |
694 | return -ENOPROTOOPT; |
695 | |
696 | if (get_user(maxlen, optlen)) |
697 | return -EFAULT; |
698 | |
699 | if (maxlen < 1) |
700 | return -EFAULT; |
701 | |
702 | valptr = (void *) &val; |
703 | length = min_t(unsigned int, maxlen, sizeof(int)); |
704 | |
705 | lock_sock(sk); |
706 | ax25 = ax25_sk(sk); |
707 | |
708 | switch (optname) { |
709 | case AX25_WINDOW: |
710 | val = ax25->window; |
711 | break; |
712 | |
713 | case AX25_T1: |
714 | val = ax25->t1 / HZ; |
715 | break; |
716 | |
717 | case AX25_T2: |
718 | val = ax25->t2 / HZ; |
719 | break; |
720 | |
721 | case AX25_N2: |
722 | val = ax25->n2; |
723 | break; |
724 | |
725 | case AX25_T3: |
726 | val = ax25->t3 / HZ; |
727 | break; |
728 | |
729 | case AX25_IDLE: |
730 | val = ax25->idle / (60 * HZ); |
731 | break; |
732 | |
733 | case AX25_BACKOFF: |
734 | val = ax25->backoff; |
735 | break; |
736 | |
737 | case AX25_EXTSEQ: |
738 | val = (ax25->modulus == AX25_EMODULUS); |
739 | break; |
740 | |
741 | case AX25_PIDINCL: |
742 | val = ax25->pidincl; |
743 | break; |
744 | |
745 | case AX25_IAMDIGI: |
746 | val = ax25->iamdigi; |
747 | break; |
748 | |
749 | case AX25_PACLEN: |
750 | val = ax25->paclen; |
751 | break; |
752 | |
753 | case SO_BINDTODEVICE: |
754 | ax25_dev = ax25->ax25_dev; |
755 | |
756 | if (ax25_dev != NULL && ax25_dev->dev != NULL) { |
757 | strlcpy(devname, ax25_dev->dev->name, sizeof(devname)); |
758 | length = strlen(devname) + 1; |
759 | } else { |
760 | *devname = '\0'; |
761 | length = 1; |
762 | } |
763 | |
764 | valptr = (void *) devname; |
765 | break; |
766 | |
767 | default: |
768 | release_sock(sk); |
769 | return -ENOPROTOOPT; |
770 | } |
771 | release_sock(sk); |
772 | |
773 | if (put_user(length, optlen)) |
774 | return -EFAULT; |
775 | |
776 | return copy_to_user(optval, valptr, length) ? -EFAULT : 0; |
777 | } |
778 | |
779 | static int ax25_listen(struct socket *sock, int backlog) |
780 | { |
781 | struct sock *sk = sock->sk; |
782 | int res = 0; |
783 | |
784 | lock_sock(sk); |
785 | if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) { |
786 | sk->sk_max_ack_backlog = backlog; |
787 | sk->sk_state = TCP_LISTEN; |
788 | goto out; |
789 | } |
790 | res = -EOPNOTSUPP; |
791 | |
792 | out: |
793 | release_sock(sk); |
794 | |
795 | return res; |
796 | } |
797 | |
798 | /* |
799 | * XXX: when creating ax25_sock we should update the .obj_size setting |
800 | * below. |
801 | */ |
802 | static struct proto ax25_proto = { |
803 | .name = "AX25", |
804 | .owner = THIS_MODULE, |
805 | .obj_size = sizeof(struct sock), |
806 | }; |
807 | |
808 | static int ax25_create(struct net *net, struct socket *sock, int protocol, |
809 | int kern) |
810 | { |
811 | struct sock *sk; |
812 | ax25_cb *ax25; |
813 | |
814 | if (!net_eq(net, &init_net)) |
815 | return -EAFNOSUPPORT; |
816 | |
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; |
845 | #endif |
846 | #ifdef CONFIG_ROSE_MODULE |
847 | case AX25_P_ROSE: |
848 | if (ax25_protocol_is_registered(AX25_P_ROSE)) |
849 | return -ESOCKTNOSUPPORT; |
850 | #endif |
851 | default: |
852 | break; |
853 | } |
854 | break; |
855 | |
856 | case SOCK_RAW: |
857 | break; |
858 | default: |
859 | return -ESOCKTNOSUPPORT; |
860 | } |
861 | |
862 | sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto); |
863 | if (sk == NULL) |
864 | return -ENOMEM; |
865 | |
866 | ax25 = sk->sk_protinfo = ax25_create_cb(); |
867 | if (!ax25) { |
868 | sk_free(sk); |
869 | return -ENOMEM; |
870 | } |
871 | |
872 | sock_init_data(sock, sk); |
873 | |
874 | sk->sk_destruct = ax25_free_sock; |
875 | sock->ops = &ax25_proto_ops; |
876 | sk->sk_protocol = protocol; |
877 | |
878 | ax25->sk = sk; |
879 | |
880 | return 0; |
881 | } |
882 | |
883 | struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev) |
884 | { |
885 | struct sock *sk; |
886 | ax25_cb *ax25, *oax25; |
887 | |
888 | sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot); |
889 | if (sk == NULL) |
890 | return NULL; |
891 | |
892 | if ((ax25 = ax25_create_cb()) == NULL) { |
893 | sk_free(sk); |
894 | return NULL; |
895 | } |
896 | |
897 | switch (osk->sk_type) { |
898 | case SOCK_DGRAM: |
899 | break; |
900 | case SOCK_SEQPACKET: |
901 | break; |
902 | default: |
903 | sk_free(sk); |
904 | ax25_cb_put(ax25); |
905 | return NULL; |
906 | } |
907 | |
908 | sock_init_data(NULL, sk); |
909 | |
910 | sk->sk_type = osk->sk_type; |
911 | sk->sk_priority = osk->sk_priority; |
912 | sk->sk_protocol = osk->sk_protocol; |
913 | sk->sk_rcvbuf = osk->sk_rcvbuf; |
914 | sk->sk_sndbuf = osk->sk_sndbuf; |
915 | sk->sk_state = TCP_ESTABLISHED; |
916 | sock_copy_flags(sk, osk); |
917 | |
918 | oax25 = ax25_sk(osk); |
919 | |
920 | ax25->modulus = oax25->modulus; |
921 | ax25->backoff = oax25->backoff; |
922 | ax25->pidincl = oax25->pidincl; |
923 | ax25->iamdigi = oax25->iamdigi; |
924 | ax25->rtt = oax25->rtt; |
925 | ax25->t1 = oax25->t1; |
926 | ax25->t2 = oax25->t2; |
927 | ax25->t3 = oax25->t3; |
928 | ax25->n2 = oax25->n2; |
929 | ax25->idle = oax25->idle; |
930 | ax25->paclen = oax25->paclen; |
931 | ax25->window = oax25->window; |
932 | |
933 | ax25->ax25_dev = ax25_dev; |
934 | ax25->source_addr = oax25->source_addr; |
935 | |
936 | if (oax25->digipeat != NULL) { |
937 | ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi), |
938 | GFP_ATOMIC); |
939 | if (ax25->digipeat == NULL) { |
940 | sk_free(sk); |
941 | ax25_cb_put(ax25); |
942 | return NULL; |
943 | } |
944 | } |
945 | |
946 | sk->sk_protinfo = ax25; |
947 | sk->sk_destruct = ax25_free_sock; |
948 | ax25->sk = sk; |
949 | |
950 | return sk; |
951 | } |
952 | |
953 | static int ax25_release(struct socket *sock) |
954 | { |
955 | struct sock *sk = sock->sk; |
956 | ax25_cb *ax25; |
957 | |
958 | if (sk == NULL) |
959 | return 0; |
960 | |
961 | sock_hold(sk); |
962 | sock_orphan(sk); |
963 | lock_sock(sk); |
964 | ax25 = ax25_sk(sk); |
965 | |
966 | if (sk->sk_type == SOCK_SEQPACKET) { |
967 | switch (ax25->state) { |
968 | case AX25_STATE_0: |
969 | release_sock(sk); |
970 | ax25_disconnect(ax25, 0); |
971 | lock_sock(sk); |
972 | ax25_destroy_socket(ax25); |
973 | break; |
974 | |
975 | case AX25_STATE_1: |
976 | case AX25_STATE_2: |
977 | ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND); |
978 | release_sock(sk); |
979 | ax25_disconnect(ax25, 0); |
980 | lock_sock(sk); |
981 | ax25_destroy_socket(ax25); |
982 | break; |
983 | |
984 | case AX25_STATE_3: |
985 | case AX25_STATE_4: |
986 | ax25_clear_queues(ax25); |
987 | ax25->n2count = 0; |
988 | |
989 | switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) { |
990 | case AX25_PROTO_STD_SIMPLEX: |
991 | case AX25_PROTO_STD_DUPLEX: |
992 | ax25_send_control(ax25, |
993 | AX25_DISC, |
994 | AX25_POLLON, |
995 | AX25_COMMAND); |
996 | ax25_stop_t2timer(ax25); |
997 | ax25_stop_t3timer(ax25); |
998 | ax25_stop_idletimer(ax25); |
999 | break; |
1000 | #ifdef CONFIG_AX25_DAMA_SLAVE |
1001 | case AX25_PROTO_DAMA_SLAVE: |
1002 | ax25_stop_t3timer(ax25); |
1003 | ax25_stop_idletimer(ax25); |
1004 | break; |
1005 | #endif |
1006 | } |
1007 | ax25_calculate_t1(ax25); |
1008 | ax25_start_t1timer(ax25); |
1009 | ax25->state = AX25_STATE_2; |
1010 | sk->sk_state = TCP_CLOSE; |
1011 | sk->sk_shutdown |= SEND_SHUTDOWN; |
1012 | sk->sk_state_change(sk); |
1013 | sock_set_flag(sk, SOCK_DESTROY); |
1014 | break; |
1015 | |
1016 | default: |
1017 | break; |
1018 | } |
1019 | } else { |
1020 | sk->sk_state = TCP_CLOSE; |
1021 | sk->sk_shutdown |= SEND_SHUTDOWN; |
1022 | sk->sk_state_change(sk); |
1023 | ax25_destroy_socket(ax25); |
1024 | } |
1025 | |
1026 | sock->sk = NULL; |
1027 | release_sock(sk); |
1028 | sock_put(sk); |
1029 | |
1030 | return 0; |
1031 | } |
1032 | |
1033 | /* |
1034 | * We support a funny extension here so you can (as root) give any callsign |
1035 | * digipeated via a local address as source. This hack is obsolete now |
1036 | * that we've implemented support for SO_BINDTODEVICE. It is however small |
1037 | * and trivially backward compatible. |
1038 | */ |
1039 | static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
1040 | { |
1041 | struct sock *sk = sock->sk; |
1042 | struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr; |
1043 | ax25_dev *ax25_dev = NULL; |
1044 | ax25_uid_assoc *user; |
1045 | ax25_address call; |
1046 | ax25_cb *ax25; |
1047 | int err = 0; |
1048 | |
1049 | if (addr_len != sizeof(struct sockaddr_ax25) && |
1050 | addr_len != sizeof(struct full_sockaddr_ax25)) |
1051 | /* support for old structure may go away some time |
1052 | * ax25_bind(): uses old (6 digipeater) socket structure. |
1053 | */ |
1054 | if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || |
1055 | (addr_len > sizeof(struct full_sockaddr_ax25))) |
1056 | return -EINVAL; |
1057 | |
1058 | if (addr->fsa_ax25.sax25_family != AF_AX25) |
1059 | return -EINVAL; |
1060 | |
1061 | user = ax25_findbyuid(current_euid()); |
1062 | if (user) { |
1063 | call = user->call; |
1064 | ax25_uid_put(user); |
1065 | } else { |
1066 | if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) |
1067 | return -EACCES; |
1068 | |
1069 | call = addr->fsa_ax25.sax25_call; |
1070 | } |
1071 | |
1072 | lock_sock(sk); |
1073 | |
1074 | ax25 = ax25_sk(sk); |
1075 | if (!sock_flag(sk, SOCK_ZAPPED)) { |
1076 | err = -EINVAL; |
1077 | goto out; |
1078 | } |
1079 | |
1080 | ax25->source_addr = call; |
1081 | |
1082 | /* |
1083 | * User already set interface with SO_BINDTODEVICE |
1084 | */ |
1085 | if (ax25->ax25_dev != NULL) |
1086 | goto done; |
1087 | |
1088 | if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) { |
1089 | if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 && |
1090 | (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) { |
1091 | err = -EADDRNOTAVAIL; |
1092 | goto out; |
1093 | } |
1094 | } else { |
1095 | if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) { |
1096 | err = -EADDRNOTAVAIL; |
1097 | goto out; |
1098 | } |
1099 | } |
1100 | |
1101 | if (ax25_dev != NULL) |
1102 | ax25_fillin_cb(ax25, ax25_dev); |
1103 | |
1104 | done: |
1105 | ax25_cb_add(ax25); |
1106 | sock_reset_flag(sk, SOCK_ZAPPED); |
1107 | |
1108 | out: |
1109 | release_sock(sk); |
1110 | |
1111 | return err; |
1112 | } |
1113 | |
1114 | /* |
1115 | * FIXME: nonblock behaviour looks like it may have a bug. |
1116 | */ |
1117 | static int __must_check ax25_connect(struct socket *sock, |
1118 | struct sockaddr *uaddr, int addr_len, int flags) |
1119 | { |
1120 | struct sock *sk = sock->sk; |
1121 | ax25_cb *ax25 = ax25_sk(sk), *ax25t; |
1122 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr; |
1123 | ax25_digi *digi = NULL; |
1124 | int ct = 0, err = 0; |
1125 | |
1126 | /* |
1127 | * some sanity checks. code further down depends on this |
1128 | */ |
1129 | |
1130 | if (addr_len == sizeof(struct sockaddr_ax25)) |
1131 | /* support for this will go away in early 2.5.x |
1132 | * ax25_connect(): uses obsolete socket structure |
1133 | */ |
1134 | ; |
1135 | else if (addr_len != sizeof(struct full_sockaddr_ax25)) |
1136 | /* support for old structure may go away some time |
1137 | * ax25_connect(): uses old (6 digipeater) socket structure. |
1138 | */ |
1139 | if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || |
1140 | (addr_len > sizeof(struct full_sockaddr_ax25))) |
1141 | return -EINVAL; |
1142 | |
1143 | |
1144 | if (fsa->fsa_ax25.sax25_family != AF_AX25) |
1145 | return -EINVAL; |
1146 | |
1147 | lock_sock(sk); |
1148 | |
1149 | /* deal with restarts */ |
1150 | if (sock->state == SS_CONNECTING) { |
1151 | switch (sk->sk_state) { |
1152 | case TCP_SYN_SENT: /* still trying */ |
1153 | err = -EINPROGRESS; |
1154 | goto out_release; |
1155 | |
1156 | case TCP_ESTABLISHED: /* connection established */ |
1157 | sock->state = SS_CONNECTED; |
1158 | goto out_release; |
1159 | |
1160 | case TCP_CLOSE: /* connection refused */ |
1161 | sock->state = SS_UNCONNECTED; |
1162 | err = -ECONNREFUSED; |
1163 | goto out_release; |
1164 | } |
1165 | } |
1166 | |
1167 | if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) { |
1168 | err = -EISCONN; /* No reconnect on a seqpacket socket */ |
1169 | goto out_release; |
1170 | } |
1171 | |
1172 | sk->sk_state = TCP_CLOSE; |
1173 | sock->state = SS_UNCONNECTED; |
1174 | |
1175 | kfree(ax25->digipeat); |
1176 | ax25->digipeat = NULL; |
1177 | |
1178 | /* |
1179 | * Handle digi-peaters to be used. |
1180 | */ |
1181 | if (addr_len > sizeof(struct sockaddr_ax25) && |
1182 | fsa->fsa_ax25.sax25_ndigis != 0) { |
1183 | /* Valid number of digipeaters ? */ |
1184 | if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) { |
1185 | err = -EINVAL; |
1186 | goto out_release; |
1187 | } |
1188 | |
1189 | if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) { |
1190 | err = -ENOBUFS; |
1191 | goto out_release; |
1192 | } |
1193 | |
1194 | digi->ndigi = fsa->fsa_ax25.sax25_ndigis; |
1195 | digi->lastrepeat = -1; |
1196 | |
1197 | while (ct < fsa->fsa_ax25.sax25_ndigis) { |
1198 | if ((fsa->fsa_digipeater[ct].ax25_call[6] & |
1199 | AX25_HBIT) && ax25->iamdigi) { |
1200 | digi->repeated[ct] = 1; |
1201 | digi->lastrepeat = ct; |
1202 | } else { |
1203 | digi->repeated[ct] = 0; |
1204 | } |
1205 | digi->calls[ct] = fsa->fsa_digipeater[ct]; |
1206 | ct++; |
1207 | } |
1208 | } |
1209 | |
1210 | /* |
1211 | * Must bind first - autobinding in this may or may not work. If |
1212 | * the socket is already bound, check to see if the device has |
1213 | * been filled in, error if it hasn't. |
1214 | */ |
1215 | if (sock_flag(sk, SOCK_ZAPPED)) { |
1216 | /* check if we can remove this feature. It is broken. */ |
1217 | printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n", |
1218 | current->comm); |
1219 | if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) { |
1220 | kfree(digi); |
1221 | goto out_release; |
1222 | } |
1223 | |
1224 | ax25_fillin_cb(ax25, ax25->ax25_dev); |
1225 | ax25_cb_add(ax25); |
1226 | } else { |
1227 | if (ax25->ax25_dev == NULL) { |
1228 | kfree(digi); |
1229 | err = -EHOSTUNREACH; |
1230 | goto out_release; |
1231 | } |
1232 | } |
1233 | |
1234 | if (sk->sk_type == SOCK_SEQPACKET && |
1235 | (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi, |
1236 | ax25->ax25_dev->dev))) { |
1237 | kfree(digi); |
1238 | err = -EADDRINUSE; /* Already such a connection */ |
1239 | ax25_cb_put(ax25t); |
1240 | goto out_release; |
1241 | } |
1242 | |
1243 | ax25->dest_addr = fsa->fsa_ax25.sax25_call; |
1244 | ax25->digipeat = digi; |
1245 | |
1246 | /* First the easy one */ |
1247 | if (sk->sk_type != SOCK_SEQPACKET) { |
1248 | sock->state = SS_CONNECTED; |
1249 | sk->sk_state = TCP_ESTABLISHED; |
1250 | goto out_release; |
1251 | } |
1252 | |
1253 | /* Move to connecting socket, ax.25 lapb WAIT_UA.. */ |
1254 | sock->state = SS_CONNECTING; |
1255 | sk->sk_state = TCP_SYN_SENT; |
1256 | |
1257 | switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) { |
1258 | case AX25_PROTO_STD_SIMPLEX: |
1259 | case AX25_PROTO_STD_DUPLEX: |
1260 | ax25_std_establish_data_link(ax25); |
1261 | break; |
1262 | |
1263 | #ifdef CONFIG_AX25_DAMA_SLAVE |
1264 | case AX25_PROTO_DAMA_SLAVE: |
1265 | ax25->modulus = AX25_MODULUS; |
1266 | ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW]; |
1267 | if (ax25->ax25_dev->dama.slave) |
1268 | ax25_ds_establish_data_link(ax25); |
1269 | else |
1270 | ax25_std_establish_data_link(ax25); |
1271 | break; |
1272 | #endif |
1273 | } |
1274 | |
1275 | ax25->state = AX25_STATE_1; |
1276 | |
1277 | ax25_start_heartbeat(ax25); |
1278 | |
1279 | /* Now the loop */ |
1280 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { |
1281 | err = -EINPROGRESS; |
1282 | goto out_release; |
1283 | } |
1284 | |
1285 | if (sk->sk_state == TCP_SYN_SENT) { |
1286 | DEFINE_WAIT(wait); |
1287 | |
1288 | for (;;) { |
1289 | prepare_to_wait(sk_sleep(sk), &wait, |
1290 | TASK_INTERRUPTIBLE); |
1291 | if (sk->sk_state != TCP_SYN_SENT) |
1292 | break; |
1293 | if (!signal_pending(current)) { |
1294 | release_sock(sk); |
1295 | schedule(); |
1296 | lock_sock(sk); |
1297 | continue; |
1298 | } |
1299 | err = -ERESTARTSYS; |
1300 | break; |
1301 | } |
1302 | finish_wait(sk_sleep(sk), &wait); |
1303 | |
1304 | if (err) |
1305 | goto out_release; |
1306 | } |
1307 | |
1308 | if (sk->sk_state != TCP_ESTABLISHED) { |
1309 | /* Not in ABM, not in WAIT_UA -> failed */ |
1310 | sock->state = SS_UNCONNECTED; |
1311 | err = sock_error(sk); /* Always set at this point */ |
1312 | goto out_release; |
1313 | } |
1314 | |
1315 | sock->state = SS_CONNECTED; |
1316 | |
1317 | err = 0; |
1318 | out_release: |
1319 | release_sock(sk); |
1320 | |
1321 | return err; |
1322 | } |
1323 | |
1324 | static int ax25_accept(struct socket *sock, struct socket *newsock, int flags) |
1325 | { |
1326 | struct sk_buff *skb; |
1327 | struct sock *newsk; |
1328 | DEFINE_WAIT(wait); |
1329 | struct sock *sk; |
1330 | int err = 0; |
1331 | |
1332 | if (sock->state != SS_UNCONNECTED) |
1333 | return -EINVAL; |
1334 | |
1335 | if ((sk = sock->sk) == NULL) |
1336 | return -EINVAL; |
1337 | |
1338 | lock_sock(sk); |
1339 | if (sk->sk_type != SOCK_SEQPACKET) { |
1340 | err = -EOPNOTSUPP; |
1341 | goto out; |
1342 | } |
1343 | |
1344 | if (sk->sk_state != TCP_LISTEN) { |
1345 | err = -EINVAL; |
1346 | goto out; |
1347 | } |
1348 | |
1349 | /* |
1350 | * The read queue this time is holding sockets ready to use |
1351 | * hooked into the SABM we saved |
1352 | */ |
1353 | for (;;) { |
1354 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1355 | skb = skb_dequeue(&sk->sk_receive_queue); |
1356 | if (skb) |
1357 | break; |
1358 | |
1359 | if (flags & O_NONBLOCK) { |
1360 | err = -EWOULDBLOCK; |
1361 | break; |
1362 | } |
1363 | if (!signal_pending(current)) { |
1364 | release_sock(sk); |
1365 | schedule(); |
1366 | lock_sock(sk); |
1367 | continue; |
1368 | } |
1369 | err = -ERESTARTSYS; |
1370 | break; |
1371 | } |
1372 | finish_wait(sk_sleep(sk), &wait); |
1373 | |
1374 | if (err) |
1375 | goto out; |
1376 | |
1377 | newsk = skb->sk; |
1378 | sock_graft(newsk, newsock); |
1379 | |
1380 | /* Now attach up the new socket */ |
1381 | kfree_skb(skb); |
1382 | sk->sk_ack_backlog--; |
1383 | newsock->state = SS_CONNECTED; |
1384 | |
1385 | out: |
1386 | release_sock(sk); |
1387 | |
1388 | return err; |
1389 | } |
1390 | |
1391 | static int ax25_getname(struct socket *sock, struct sockaddr *uaddr, |
1392 | int *uaddr_len, int peer) |
1393 | { |
1394 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr; |
1395 | struct sock *sk = sock->sk; |
1396 | unsigned char ndigi, i; |
1397 | ax25_cb *ax25; |
1398 | int err = 0; |
1399 | |
1400 | memset(fsa, 0, sizeof(*fsa)); |
1401 | lock_sock(sk); |
1402 | ax25 = ax25_sk(sk); |
1403 | |
1404 | if (peer != 0) { |
1405 | if (sk->sk_state != TCP_ESTABLISHED) { |
1406 | err = -ENOTCONN; |
1407 | goto out; |
1408 | } |
1409 | |
1410 | fsa->fsa_ax25.sax25_family = AF_AX25; |
1411 | fsa->fsa_ax25.sax25_call = ax25->dest_addr; |
1412 | |
1413 | if (ax25->digipeat != NULL) { |
1414 | ndigi = ax25->digipeat->ndigi; |
1415 | fsa->fsa_ax25.sax25_ndigis = ndigi; |
1416 | for (i = 0; i < ndigi; i++) |
1417 | fsa->fsa_digipeater[i] = |
1418 | ax25->digipeat->calls[i]; |
1419 | } |
1420 | } else { |
1421 | fsa->fsa_ax25.sax25_family = AF_AX25; |
1422 | fsa->fsa_ax25.sax25_call = ax25->source_addr; |
1423 | fsa->fsa_ax25.sax25_ndigis = 1; |
1424 | if (ax25->ax25_dev != NULL) { |
1425 | memcpy(&fsa->fsa_digipeater[0], |
1426 | ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN); |
1427 | } else { |
1428 | fsa->fsa_digipeater[0] = null_ax25_address; |
1429 | } |
1430 | } |
1431 | *uaddr_len = sizeof (struct full_sockaddr_ax25); |
1432 | |
1433 | out: |
1434 | release_sock(sk); |
1435 | |
1436 | return err; |
1437 | } |
1438 | |
1439 | static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock, |
1440 | struct msghdr *msg, size_t len) |
1441 | { |
1442 | struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name; |
1443 | struct sock *sk = sock->sk; |
1444 | struct sockaddr_ax25 sax; |
1445 | struct sk_buff *skb; |
1446 | ax25_digi dtmp, *dp; |
1447 | ax25_cb *ax25; |
1448 | size_t size; |
1449 | int lv, err, addr_len = msg->msg_namelen; |
1450 | |
1451 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) |
1452 | return -EINVAL; |
1453 | |
1454 | lock_sock(sk); |
1455 | ax25 = ax25_sk(sk); |
1456 | |
1457 | if (sock_flag(sk, SOCK_ZAPPED)) { |
1458 | err = -EADDRNOTAVAIL; |
1459 | goto out; |
1460 | } |
1461 | |
1462 | if (sk->sk_shutdown & SEND_SHUTDOWN) { |
1463 | send_sig(SIGPIPE, current, 0); |
1464 | err = -EPIPE; |
1465 | goto out; |
1466 | } |
1467 | |
1468 | if (ax25->ax25_dev == NULL) { |
1469 | err = -ENETUNREACH; |
1470 | goto out; |
1471 | } |
1472 | |
1473 | if (len > ax25->ax25_dev->dev->mtu) { |
1474 | err = -EMSGSIZE; |
1475 | goto out; |
1476 | } |
1477 | |
1478 | if (usax != NULL) { |
1479 | if (usax->sax25_family != AF_AX25) { |
1480 | err = -EINVAL; |
1481 | goto out; |
1482 | } |
1483 | |
1484 | if (addr_len == sizeof(struct sockaddr_ax25)) |
1485 | /* ax25_sendmsg(): uses obsolete socket structure */ |
1486 | ; |
1487 | else if (addr_len != sizeof(struct full_sockaddr_ax25)) |
1488 | /* support for old structure may go away some time |
1489 | * ax25_sendmsg(): uses old (6 digipeater) |
1490 | * socket structure. |
1491 | */ |
1492 | if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || |
1493 | (addr_len > sizeof(struct full_sockaddr_ax25))) { |
1494 | err = -EINVAL; |
1495 | goto out; |
1496 | } |
1497 | |
1498 | |
1499 | if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) { |
1500 | int ct = 0; |
1501 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax; |
1502 | |
1503 | /* Valid number of digipeaters ? */ |
1504 | if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) { |
1505 | err = -EINVAL; |
1506 | goto out; |
1507 | } |
1508 | |
1509 | dtmp.ndigi = usax->sax25_ndigis; |
1510 | |
1511 | while (ct < usax->sax25_ndigis) { |
1512 | dtmp.repeated[ct] = 0; |
1513 | dtmp.calls[ct] = fsa->fsa_digipeater[ct]; |
1514 | ct++; |
1515 | } |
1516 | |
1517 | dtmp.lastrepeat = 0; |
1518 | } |
1519 | |
1520 | sax = *usax; |
1521 | if (sk->sk_type == SOCK_SEQPACKET && |
1522 | ax25cmp(&ax25->dest_addr, &sax.sax25_call)) { |
1523 | err = -EISCONN; |
1524 | goto out; |
1525 | } |
1526 | if (usax->sax25_ndigis == 0) |
1527 | dp = NULL; |
1528 | else |
1529 | dp = &dtmp; |
1530 | } else { |
1531 | /* |
1532 | * FIXME: 1003.1g - if the socket is like this because |
1533 | * it has become closed (not started closed) and is VC |
1534 | * we ought to SIGPIPE, EPIPE |
1535 | */ |
1536 | if (sk->sk_state != TCP_ESTABLISHED) { |
1537 | err = -ENOTCONN; |
1538 | goto out; |
1539 | } |
1540 | sax.sax25_family = AF_AX25; |
1541 | sax.sax25_call = ax25->dest_addr; |
1542 | dp = ax25->digipeat; |
1543 | } |
1544 | |
1545 | /* Build a packet */ |
1546 | /* Assume the worst case */ |
1547 | size = len + ax25->ax25_dev->dev->hard_header_len; |
1548 | |
1549 | skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err); |
1550 | if (skb == NULL) |
1551 | goto out; |
1552 | |
1553 | skb_reserve(skb, size - len); |
1554 | |
1555 | /* User data follows immediately after the AX.25 data */ |
1556 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { |
1557 | err = -EFAULT; |
1558 | kfree_skb(skb); |
1559 | goto out; |
1560 | } |
1561 | |
1562 | skb_reset_network_header(skb); |
1563 | |
1564 | /* Add the PID if one is not supplied by the user in the skb */ |
1565 | if (!ax25->pidincl) |
1566 | *skb_push(skb, 1) = sk->sk_protocol; |
1567 | |
1568 | if (sk->sk_type == SOCK_SEQPACKET) { |
1569 | /* Connected mode sockets go via the LAPB machine */ |
1570 | if (sk->sk_state != TCP_ESTABLISHED) { |
1571 | kfree_skb(skb); |
1572 | err = -ENOTCONN; |
1573 | goto out; |
1574 | } |
1575 | |
1576 | /* Shove it onto the queue and kick */ |
1577 | ax25_output(ax25, ax25->paclen, skb); |
1578 | |
1579 | err = len; |
1580 | goto out; |
1581 | } |
1582 | |
1583 | skb_push(skb, 1 + ax25_addr_size(dp)); |
1584 | |
1585 | /* Building AX.25 Header */ |
1586 | |
1587 | /* Build an AX.25 header */ |
1588 | lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call, |
1589 | dp, AX25_COMMAND, AX25_MODULUS); |
1590 | |
1591 | skb_set_transport_header(skb, lv); |
1592 | |
1593 | *skb_transport_header(skb) = AX25_UI; |
1594 | |
1595 | /* Datagram frames go straight out of the door as UI */ |
1596 | ax25_queue_xmit(skb, ax25->ax25_dev->dev); |
1597 | |
1598 | err = len; |
1599 | |
1600 | out: |
1601 | release_sock(sk); |
1602 | |
1603 | return err; |
1604 | } |
1605 | |
1606 | static int ax25_recvmsg(struct kiocb *iocb, struct socket *sock, |
1607 | struct msghdr *msg, size_t size, int flags) |
1608 | { |
1609 | struct sock *sk = sock->sk; |
1610 | struct sk_buff *skb; |
1611 | int copied; |
1612 | int err = 0; |
1613 | |
1614 | lock_sock(sk); |
1615 | /* |
1616 | * This works for seqpacket too. The receiver has ordered the |
1617 | * queue for us! We do one quick check first though |
1618 | */ |
1619 | if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) { |
1620 | err = -ENOTCONN; |
1621 | goto out; |
1622 | } |
1623 | |
1624 | /* Now we can treat all alike */ |
1625 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, |
1626 | flags & MSG_DONTWAIT, &err); |
1627 | if (skb == NULL) |
1628 | goto out; |
1629 | |
1630 | if (!ax25_sk(sk)->pidincl) |
1631 | skb_pull(skb, 1); /* Remove PID */ |
1632 | |
1633 | skb_reset_transport_header(skb); |
1634 | copied = skb->len; |
1635 | |
1636 | if (copied > size) { |
1637 | copied = size; |
1638 | msg->msg_flags |= MSG_TRUNC; |
1639 | } |
1640 | |
1641 | skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
1642 | |
1643 | if (msg->msg_namelen != 0) { |
1644 | struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name; |
1645 | ax25_digi digi; |
1646 | ax25_address src; |
1647 | const unsigned char *mac = skb_mac_header(skb); |
1648 | |
1649 | ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL, |
1650 | &digi, NULL, NULL); |
1651 | sax->sax25_family = AF_AX25; |
1652 | /* We set this correctly, even though we may not let the |
1653 | application know the digi calls further down (because it |
1654 | did NOT ask to know them). This could get political... **/ |
1655 | sax->sax25_ndigis = digi.ndigi; |
1656 | sax->sax25_call = src; |
1657 | |
1658 | if (sax->sax25_ndigis != 0) { |
1659 | int ct; |
1660 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax; |
1661 | |
1662 | for (ct = 0; ct < digi.ndigi; ct++) |
1663 | fsa->fsa_digipeater[ct] = digi.calls[ct]; |
1664 | } |
1665 | msg->msg_namelen = sizeof(struct full_sockaddr_ax25); |
1666 | } |
1667 | |
1668 | skb_free_datagram(sk, skb); |
1669 | err = copied; |
1670 | |
1671 | out: |
1672 | release_sock(sk); |
1673 | |
1674 | return err; |
1675 | } |
1676 | |
1677 | static int ax25_shutdown(struct socket *sk, int how) |
1678 | { |
1679 | /* FIXME - generate DM and RNR states */ |
1680 | return -EOPNOTSUPP; |
1681 | } |
1682 | |
1683 | static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
1684 | { |
1685 | struct sock *sk = sock->sk; |
1686 | void __user *argp = (void __user *)arg; |
1687 | int res = 0; |
1688 | |
1689 | lock_sock(sk); |
1690 | switch (cmd) { |
1691 | case TIOCOUTQ: { |
1692 | long amount; |
1693 | |
1694 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
1695 | if (amount < 0) |
1696 | amount = 0; |
1697 | res = put_user(amount, (int __user *)argp); |
1698 | break; |
1699 | } |
1700 | |
1701 | case TIOCINQ: { |
1702 | struct sk_buff *skb; |
1703 | long amount = 0L; |
1704 | /* These two are safe on a single CPU system as only user tasks fiddle here */ |
1705 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) |
1706 | amount = skb->len; |
1707 | res = put_user(amount, (int __user *) argp); |
1708 | break; |
1709 | } |
1710 | |
1711 | case SIOCGSTAMP: |
1712 | res = sock_get_timestamp(sk, argp); |
1713 | break; |
1714 | |
1715 | case SIOCGSTAMPNS: |
1716 | res = sock_get_timestampns(sk, argp); |
1717 | break; |
1718 | |
1719 | case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */ |
1720 | case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */ |
1721 | case SIOCAX25GETUID: { |
1722 | struct sockaddr_ax25 sax25; |
1723 | if (copy_from_user(&sax25, argp, sizeof(sax25))) { |
1724 | res = -EFAULT; |
1725 | break; |
1726 | } |
1727 | res = ax25_uid_ioctl(cmd, &sax25); |
1728 | break; |
1729 | } |
1730 | |
1731 | case SIOCAX25NOUID: { /* Set the default policy (default/bar) */ |
1732 | long amount; |
1733 | if (!capable(CAP_NET_ADMIN)) { |
1734 | res = -EPERM; |
1735 | break; |
1736 | } |
1737 | if (get_user(amount, (long __user *)argp)) { |
1738 | res = -EFAULT; |
1739 | break; |
1740 | } |
1741 | if (amount > AX25_NOUID_BLOCK) { |
1742 | res = -EINVAL; |
1743 | break; |
1744 | } |
1745 | ax25_uid_policy = amount; |
1746 | res = 0; |
1747 | break; |
1748 | } |
1749 | |
1750 | case SIOCADDRT: |
1751 | case SIOCDELRT: |
1752 | case SIOCAX25OPTRT: |
1753 | if (!capable(CAP_NET_ADMIN)) { |
1754 | res = -EPERM; |
1755 | break; |
1756 | } |
1757 | res = ax25_rt_ioctl(cmd, argp); |
1758 | break; |
1759 | |
1760 | case SIOCAX25CTLCON: |
1761 | if (!capable(CAP_NET_ADMIN)) { |
1762 | res = -EPERM; |
1763 | break; |
1764 | } |
1765 | res = ax25_ctl_ioctl(cmd, argp); |
1766 | break; |
1767 | |
1768 | case SIOCAX25GETINFO: |
1769 | case SIOCAX25GETINFOOLD: { |
1770 | ax25_cb *ax25 = ax25_sk(sk); |
1771 | struct ax25_info_struct ax25_info; |
1772 | |
1773 | ax25_info.t1 = ax25->t1 / HZ; |
1774 | ax25_info.t2 = ax25->t2 / HZ; |
1775 | ax25_info.t3 = ax25->t3 / HZ; |
1776 | ax25_info.idle = ax25->idle / (60 * HZ); |
1777 | ax25_info.n2 = ax25->n2; |
1778 | ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ; |
1779 | ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ; |
1780 | ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ; |
1781 | ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ); |
1782 | ax25_info.n2count = ax25->n2count; |
1783 | ax25_info.state = ax25->state; |
1784 | ax25_info.rcv_q = sk_rmem_alloc_get(sk); |
1785 | ax25_info.snd_q = sk_wmem_alloc_get(sk); |
1786 | ax25_info.vs = ax25->vs; |
1787 | ax25_info.vr = ax25->vr; |
1788 | ax25_info.va = ax25->va; |
1789 | ax25_info.vs_max = ax25->vs; /* reserved */ |
1790 | ax25_info.paclen = ax25->paclen; |
1791 | ax25_info.window = ax25->window; |
1792 | |
1793 | /* old structure? */ |
1794 | if (cmd == SIOCAX25GETINFOOLD) { |
1795 | static int warned = 0; |
1796 | if (!warned) { |
1797 | printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n", |
1798 | current->comm); |
1799 | warned=1; |
1800 | } |
1801 | |
1802 | if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) { |
1803 | res = -EFAULT; |
1804 | break; |
1805 | } |
1806 | } else { |
1807 | if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) { |
1808 | res = -EINVAL; |
1809 | break; |
1810 | } |
1811 | } |
1812 | res = 0; |
1813 | break; |
1814 | } |
1815 | |
1816 | case SIOCAX25ADDFWD: |
1817 | case SIOCAX25DELFWD: { |
1818 | struct ax25_fwd_struct ax25_fwd; |
1819 | if (!capable(CAP_NET_ADMIN)) { |
1820 | res = -EPERM; |
1821 | break; |
1822 | } |
1823 | if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) { |
1824 | res = -EFAULT; |
1825 | break; |
1826 | } |
1827 | res = ax25_fwd_ioctl(cmd, &ax25_fwd); |
1828 | break; |
1829 | } |
1830 | |
1831 | case SIOCGIFADDR: |
1832 | case SIOCSIFADDR: |
1833 | case SIOCGIFDSTADDR: |
1834 | case SIOCSIFDSTADDR: |
1835 | case SIOCGIFBRDADDR: |
1836 | case SIOCSIFBRDADDR: |
1837 | case SIOCGIFNETMASK: |
1838 | case SIOCSIFNETMASK: |
1839 | case SIOCGIFMETRIC: |
1840 | case SIOCSIFMETRIC: |
1841 | res = -EINVAL; |
1842 | break; |
1843 | |
1844 | default: |
1845 | res = -ENOIOCTLCMD; |
1846 | break; |
1847 | } |
1848 | release_sock(sk); |
1849 | |
1850 | return res; |
1851 | } |
1852 | |
1853 | #ifdef CONFIG_PROC_FS |
1854 | |
1855 | static void *ax25_info_start(struct seq_file *seq, loff_t *pos) |
1856 | __acquires(ax25_list_lock) |
1857 | { |
1858 | spin_lock_bh(&ax25_list_lock); |
1859 | return seq_hlist_start(&ax25_list, *pos); |
1860 | } |
1861 | |
1862 | static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos) |
1863 | { |
1864 | return seq_hlist_next(v, &ax25_list, pos); |
1865 | } |
1866 | |
1867 | static void ax25_info_stop(struct seq_file *seq, void *v) |
1868 | __releases(ax25_list_lock) |
1869 | { |
1870 | spin_unlock_bh(&ax25_list_lock); |
1871 | } |
1872 | |
1873 | static int ax25_info_show(struct seq_file *seq, void *v) |
1874 | { |
1875 | ax25_cb *ax25 = hlist_entry(v, struct ax25_cb, ax25_node); |
1876 | char buf[11]; |
1877 | int k; |
1878 | |
1879 | |
1880 | /* |
1881 | * New format: |
1882 | * 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 |
1883 | */ |
1884 | |
1885 | seq_printf(seq, "%8.8lx %s %s%s ", |
1886 | (long) ax25, |
1887 | ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name, |
1888 | ax2asc(buf, &ax25->source_addr), |
1889 | ax25->iamdigi? "*":""); |
1890 | seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr)); |
1891 | |
1892 | for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) { |
1893 | seq_printf(seq, ",%s%s", |
1894 | ax2asc(buf, &ax25->digipeat->calls[k]), |
1895 | ax25->digipeat->repeated[k]? "*":""); |
1896 | } |
1897 | |
1898 | seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d", |
1899 | ax25->state, |
1900 | ax25->vs, ax25->vr, ax25->va, |
1901 | ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ, |
1902 | ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ, |
1903 | ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ, |
1904 | ax25_display_timer(&ax25->idletimer) / (60 * HZ), |
1905 | ax25->idle / (60 * HZ), |
1906 | ax25->n2count, ax25->n2, |
1907 | ax25->rtt / HZ, |
1908 | ax25->window, |
1909 | ax25->paclen); |
1910 | |
1911 | if (ax25->sk != NULL) { |
1912 | seq_printf(seq, " %d %d %lu\n", |
1913 | sk_wmem_alloc_get(ax25->sk), |
1914 | sk_rmem_alloc_get(ax25->sk), |
1915 | sock_i_ino(ax25->sk)); |
1916 | } else { |
1917 | seq_puts(seq, " * * *\n"); |
1918 | } |
1919 | return 0; |
1920 | } |
1921 | |
1922 | static const struct seq_operations ax25_info_seqops = { |
1923 | .start = ax25_info_start, |
1924 | .next = ax25_info_next, |
1925 | .stop = ax25_info_stop, |
1926 | .show = ax25_info_show, |
1927 | }; |
1928 | |
1929 | static int ax25_info_open(struct inode *inode, struct file *file) |
1930 | { |
1931 | return seq_open(file, &ax25_info_seqops); |
1932 | } |
1933 | |
1934 | static const struct file_operations ax25_info_fops = { |
1935 | .owner = THIS_MODULE, |
1936 | .open = ax25_info_open, |
1937 | .read = seq_read, |
1938 | .llseek = seq_lseek, |
1939 | .release = seq_release, |
1940 | }; |
1941 | |
1942 | #endif |
1943 | |
1944 | static const struct net_proto_family ax25_family_ops = { |
1945 | .family = PF_AX25, |
1946 | .create = ax25_create, |
1947 | .owner = THIS_MODULE, |
1948 | }; |
1949 | |
1950 | static const struct proto_ops ax25_proto_ops = { |
1951 | .family = PF_AX25, |
1952 | .owner = THIS_MODULE, |
1953 | .release = ax25_release, |
1954 | .bind = ax25_bind, |
1955 | .connect = ax25_connect, |
1956 | .socketpair = sock_no_socketpair, |
1957 | .accept = ax25_accept, |
1958 | .getname = ax25_getname, |
1959 | .poll = datagram_poll, |
1960 | .ioctl = ax25_ioctl, |
1961 | .listen = ax25_listen, |
1962 | .shutdown = ax25_shutdown, |
1963 | .setsockopt = ax25_setsockopt, |
1964 | .getsockopt = ax25_getsockopt, |
1965 | .sendmsg = ax25_sendmsg, |
1966 | .recvmsg = ax25_recvmsg, |
1967 | .mmap = sock_no_mmap, |
1968 | .sendpage = sock_no_sendpage, |
1969 | }; |
1970 | |
1971 | /* |
1972 | * Called by socket.c on kernel start up |
1973 | */ |
1974 | static struct packet_type ax25_packet_type __read_mostly = { |
1975 | .type = cpu_to_be16(ETH_P_AX25), |
1976 | .func = ax25_kiss_rcv, |
1977 | }; |
1978 | |
1979 | static struct notifier_block ax25_dev_notifier = { |
1980 | .notifier_call =ax25_device_event, |
1981 | }; |
1982 | |
1983 | static int __init ax25_init(void) |
1984 | { |
1985 | int rc = proto_register(&ax25_proto, 0); |
1986 | |
1987 | if (rc != 0) |
1988 | goto out; |
1989 | |
1990 | sock_register(&ax25_family_ops); |
1991 | dev_add_pack(&ax25_packet_type); |
1992 | register_netdevice_notifier(&ax25_dev_notifier); |
1993 | ax25_register_sysctl(); |
1994 | |
1995 | proc_net_fops_create(&init_net, "ax25_route", S_IRUGO, &ax25_route_fops); |
1996 | proc_net_fops_create(&init_net, "ax25", S_IRUGO, &ax25_info_fops); |
1997 | proc_net_fops_create(&init_net, "ax25_calls", S_IRUGO, &ax25_uid_fops); |
1998 | out: |
1999 | return rc; |
2000 | } |
2001 | module_init(ax25_init); |
2002 | |
2003 | |
2004 | MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); |
2005 | MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol"); |
2006 | MODULE_LICENSE("GPL"); |
2007 | MODULE_ALIAS_NETPROTO(PF_AX25); |
2008 | |
2009 | static void __exit ax25_exit(void) |
2010 | { |
2011 | proc_net_remove(&init_net, "ax25_route"); |
2012 | proc_net_remove(&init_net, "ax25"); |
2013 | proc_net_remove(&init_net, "ax25_calls"); |
2014 | |
2015 | unregister_netdevice_notifier(&ax25_dev_notifier); |
2016 | ax25_unregister_sysctl(); |
2017 | |
2018 | dev_remove_pack(&ax25_packet_type); |
2019 | |
2020 | sock_unregister(PF_AX25); |
2021 | proto_unregister(&ax25_proto); |
2022 | |
2023 | ax25_rt_free(); |
2024 | ax25_uid_free(); |
2025 | ax25_dev_free(); |
2026 | } |
2027 | module_exit(ax25_exit); |
2028 |
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