1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
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 | */ |
13 | #include <linux/capability.h> |
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> |
20 | #include <linux/sched/signal.h> |
21 | #include <linux/timer.h> |
22 | #include <linux/string.h> |
23 | #include <linux/sockios.h> |
24 | #include <linux/net.h> |
25 | #include <linux/slab.h> |
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> |
32 | #include <linux/uaccess.h> |
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> |
40 | #include <linux/sysctl.h> |
41 | #include <linux/init.h> |
42 | #include <linux/spinlock.h> |
43 | #include <net/net_namespace.h> |
44 | #include <net/tcp_states.h> |
45 | #include <net/ip.h> |
46 | #include <net/arp.h> |
47 | |
48 | |
49 | |
50 | HLIST_HEAD(ax25_list); |
51 | DEFINE_SPINLOCK(ax25_list_lock); |
52 | |
53 | static const struct proto_ops ax25_proto_ops; |
54 | |
55 | static void ax25_free_sock(struct sock *sk) |
56 | { |
57 | ax25_cb_put(ax25: sk_to_ax25(sk)); |
58 | } |
59 | |
60 | /* |
61 | * Socket removal during an interrupt is now safe. |
62 | */ |
63 | static void ax25_cb_del(ax25_cb *ax25) |
64 | { |
65 | spin_lock_bh(lock: &ax25_list_lock); |
66 | if (!hlist_unhashed(h: &ax25->ax25_node)) { |
67 | hlist_del_init(n: &ax25->ax25_node); |
68 | ax25_cb_put(ax25); |
69 | } |
70 | spin_unlock_bh(lock: &ax25_list_lock); |
71 | } |
72 | |
73 | /* |
74 | * Kill all bound sockets on a dropped device. |
75 | */ |
76 | static void ax25_kill_by_device(struct net_device *dev) |
77 | { |
78 | ax25_dev *ax25_dev; |
79 | ax25_cb *s; |
80 | struct sock *sk; |
81 | |
82 | if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) |
83 | return; |
84 | ax25_dev->device_up = false; |
85 | |
86 | spin_lock_bh(lock: &ax25_list_lock); |
87 | again: |
88 | ax25_for_each(s, &ax25_list) { |
89 | if (s->ax25_dev == ax25_dev) { |
90 | sk = s->sk; |
91 | if (!sk) { |
92 | spin_unlock_bh(lock: &ax25_list_lock); |
93 | ax25_disconnect(s, ENETUNREACH); |
94 | s->ax25_dev = NULL; |
95 | ax25_cb_del(ax25: s); |
96 | spin_lock_bh(lock: &ax25_list_lock); |
97 | goto again; |
98 | } |
99 | sock_hold(sk); |
100 | spin_unlock_bh(lock: &ax25_list_lock); |
101 | lock_sock(sk); |
102 | ax25_disconnect(s, ENETUNREACH); |
103 | s->ax25_dev = NULL; |
104 | if (sk->sk_socket) { |
105 | netdev_put(dev: ax25_dev->dev, |
106 | tracker: &ax25_dev->dev_tracker); |
107 | ax25_dev_put(ax25_dev); |
108 | } |
109 | ax25_cb_del(ax25: s); |
110 | release_sock(sk); |
111 | spin_lock_bh(lock: &ax25_list_lock); |
112 | sock_put(sk); |
113 | /* The entry could have been deleted from the |
114 | * list meanwhile and thus the next pointer is |
115 | * no longer valid. Play it safe and restart |
116 | * the scan. Forward progress is ensured |
117 | * because we set s->ax25_dev to NULL and we |
118 | * are never passed a NULL 'dev' argument. |
119 | */ |
120 | goto again; |
121 | } |
122 | } |
123 | spin_unlock_bh(lock: &ax25_list_lock); |
124 | } |
125 | |
126 | /* |
127 | * Handle device status changes. |
128 | */ |
129 | static int ax25_device_event(struct notifier_block *this, unsigned long event, |
130 | void *ptr) |
131 | { |
132 | struct net_device *dev = netdev_notifier_info_to_dev(info: ptr); |
133 | |
134 | if (!net_eq(net1: dev_net(dev), net2: &init_net)) |
135 | return NOTIFY_DONE; |
136 | |
137 | /* Reject non AX.25 devices */ |
138 | if (dev->type != ARPHRD_AX25) |
139 | return NOTIFY_DONE; |
140 | |
141 | switch (event) { |
142 | case NETDEV_UP: |
143 | ax25_dev_device_up(dev); |
144 | break; |
145 | case NETDEV_DOWN: |
146 | ax25_kill_by_device(dev); |
147 | ax25_rt_device_down(dev); |
148 | ax25_dev_device_down(dev); |
149 | break; |
150 | default: |
151 | break; |
152 | } |
153 | |
154 | return NOTIFY_DONE; |
155 | } |
156 | |
157 | /* |
158 | * Add a socket to the bound sockets list. |
159 | */ |
160 | void ax25_cb_add(ax25_cb *ax25) |
161 | { |
162 | spin_lock_bh(lock: &ax25_list_lock); |
163 | ax25_cb_hold(ax25); |
164 | hlist_add_head(n: &ax25->ax25_node, h: &ax25_list); |
165 | spin_unlock_bh(lock: &ax25_list_lock); |
166 | } |
167 | |
168 | /* |
169 | * Find a socket that wants to accept the SABM we have just |
170 | * received. |
171 | */ |
172 | struct sock *ax25_find_listener(ax25_address *addr, int digi, |
173 | struct net_device *dev, int type) |
174 | { |
175 | ax25_cb *s; |
176 | |
177 | spin_lock(lock: &ax25_list_lock); |
178 | ax25_for_each(s, &ax25_list) { |
179 | if ((s->iamdigi && !digi) || (!s->iamdigi && digi)) |
180 | continue; |
181 | if (s->sk && !ax25cmp(&s->source_addr, addr) && |
182 | s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) { |
183 | /* If device is null we match any device */ |
184 | if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) { |
185 | sock_hold(sk: s->sk); |
186 | spin_unlock(lock: &ax25_list_lock); |
187 | return s->sk; |
188 | } |
189 | } |
190 | } |
191 | spin_unlock(lock: &ax25_list_lock); |
192 | |
193 | return NULL; |
194 | } |
195 | |
196 | /* |
197 | * Find an AX.25 socket given both ends. |
198 | */ |
199 | struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr, |
200 | int type) |
201 | { |
202 | struct sock *sk = NULL; |
203 | ax25_cb *s; |
204 | |
205 | spin_lock(lock: &ax25_list_lock); |
206 | ax25_for_each(s, &ax25_list) { |
207 | if (s->sk && !ax25cmp(&s->source_addr, my_addr) && |
208 | !ax25cmp(&s->dest_addr, dest_addr) && |
209 | s->sk->sk_type == type) { |
210 | sk = s->sk; |
211 | sock_hold(sk); |
212 | break; |
213 | } |
214 | } |
215 | |
216 | spin_unlock(lock: &ax25_list_lock); |
217 | |
218 | return sk; |
219 | } |
220 | |
221 | /* |
222 | * Find an AX.25 control block given both ends. It will only pick up |
223 | * floating AX.25 control blocks or non Raw socket bound control blocks. |
224 | */ |
225 | ax25_cb *ax25_find_cb(const ax25_address *src_addr, ax25_address *dest_addr, |
226 | ax25_digi *digi, struct net_device *dev) |
227 | { |
228 | ax25_cb *s; |
229 | |
230 | spin_lock_bh(lock: &ax25_list_lock); |
231 | ax25_for_each(s, &ax25_list) { |
232 | if (s->sk && s->sk->sk_type != SOCK_SEQPACKET) |
233 | continue; |
234 | if (s->ax25_dev == NULL) |
235 | continue; |
236 | if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) { |
237 | if (digi != NULL && digi->ndigi != 0) { |
238 | if (s->digipeat == NULL) |
239 | continue; |
240 | if (ax25digicmp(s->digipeat, digi) != 0) |
241 | continue; |
242 | } else { |
243 | if (s->digipeat != NULL && s->digipeat->ndigi != 0) |
244 | continue; |
245 | } |
246 | ax25_cb_hold(s); |
247 | spin_unlock_bh(lock: &ax25_list_lock); |
248 | |
249 | return s; |
250 | } |
251 | } |
252 | spin_unlock_bh(lock: &ax25_list_lock); |
253 | |
254 | return NULL; |
255 | } |
256 | |
257 | EXPORT_SYMBOL(ax25_find_cb); |
258 | |
259 | void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto) |
260 | { |
261 | ax25_cb *s; |
262 | struct sk_buff *copy; |
263 | |
264 | spin_lock(lock: &ax25_list_lock); |
265 | ax25_for_each(s, &ax25_list) { |
266 | if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 && |
267 | s->sk->sk_type == SOCK_RAW && |
268 | s->sk->sk_protocol == proto && |
269 | s->ax25_dev->dev == skb->dev && |
270 | atomic_read(v: &s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) { |
271 | if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL) |
272 | continue; |
273 | if (sock_queue_rcv_skb(sk: s->sk, skb: copy) != 0) |
274 | kfree_skb(skb: copy); |
275 | } |
276 | } |
277 | spin_unlock(lock: &ax25_list_lock); |
278 | } |
279 | |
280 | /* |
281 | * Deferred destroy. |
282 | */ |
283 | void ax25_destroy_socket(ax25_cb *); |
284 | |
285 | /* |
286 | * Handler for deferred kills. |
287 | */ |
288 | static void ax25_destroy_timer(struct timer_list *t) |
289 | { |
290 | ax25_cb *ax25 = from_timer(ax25, t, dtimer); |
291 | struct sock *sk; |
292 | |
293 | sk=ax25->sk; |
294 | |
295 | bh_lock_sock(sk); |
296 | sock_hold(sk); |
297 | ax25_destroy_socket(ax25); |
298 | bh_unlock_sock(sk); |
299 | sock_put(sk); |
300 | } |
301 | |
302 | /* |
303 | * This is called from user mode and the timers. Thus it protects itself |
304 | * against interrupt users but doesn't worry about being called during |
305 | * work. Once it is removed from the queue no interrupt or bottom half |
306 | * will touch it and we are (fairly 8-) ) safe. |
307 | */ |
308 | void ax25_destroy_socket(ax25_cb *ax25) |
309 | { |
310 | struct sk_buff *skb; |
311 | |
312 | ax25_cb_del(ax25); |
313 | |
314 | ax25_stop_heartbeat(ax25); |
315 | ax25_stop_t1timer(ax25); |
316 | ax25_stop_t2timer(ax25); |
317 | ax25_stop_t3timer(ax25); |
318 | ax25_stop_idletimer(ax25); |
319 | |
320 | ax25_clear_queues(ax25); /* Flush the queues */ |
321 | |
322 | if (ax25->sk != NULL) { |
323 | while ((skb = skb_dequeue(list: &ax25->sk->sk_receive_queue)) != NULL) { |
324 | if (skb->sk != ax25->sk) { |
325 | /* A pending connection */ |
326 | ax25_cb *sax25 = sk_to_ax25(sk: skb->sk); |
327 | |
328 | /* Queue the unaccepted socket for death */ |
329 | sock_orphan(sk: skb->sk); |
330 | |
331 | /* 9A4GL: hack to release unaccepted sockets */ |
332 | skb->sk->sk_state = TCP_LISTEN; |
333 | |
334 | ax25_start_heartbeat(sax25); |
335 | sax25->state = AX25_STATE_0; |
336 | } |
337 | |
338 | kfree_skb(skb); |
339 | } |
340 | skb_queue_purge(list: &ax25->sk->sk_write_queue); |
341 | } |
342 | |
343 | if (ax25->sk != NULL) { |
344 | if (sk_has_allocations(sk: ax25->sk)) { |
345 | /* Defer: outstanding buffers */ |
346 | timer_setup(&ax25->dtimer, ax25_destroy_timer, 0); |
347 | ax25->dtimer.expires = jiffies + 2 * HZ; |
348 | add_timer(timer: &ax25->dtimer); |
349 | } else { |
350 | struct sock *sk=ax25->sk; |
351 | ax25->sk=NULL; |
352 | sock_put(sk); |
353 | } |
354 | } else { |
355 | ax25_cb_put(ax25); |
356 | } |
357 | } |
358 | |
359 | /* |
360 | * dl1bke 960311: set parameters for existing AX.25 connections, |
361 | * includes a KILL command to abort any connection. |
362 | * VERY useful for debugging ;-) |
363 | */ |
364 | static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg) |
365 | { |
366 | struct ax25_ctl_struct ax25_ctl; |
367 | ax25_digi digi; |
368 | ax25_dev *ax25_dev; |
369 | ax25_cb *ax25; |
370 | unsigned int k; |
371 | int ret = 0; |
372 | |
373 | if (copy_from_user(to: &ax25_ctl, from: arg, n: sizeof(ax25_ctl))) |
374 | return -EFAULT; |
375 | |
376 | if (ax25_ctl.digi_count > AX25_MAX_DIGIS) |
377 | return -EINVAL; |
378 | |
379 | if (ax25_ctl.arg > ULONG_MAX / HZ && ax25_ctl.cmd != AX25_KILL) |
380 | return -EINVAL; |
381 | |
382 | ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr); |
383 | if (!ax25_dev) |
384 | return -ENODEV; |
385 | |
386 | digi.ndigi = ax25_ctl.digi_count; |
387 | for (k = 0; k < digi.ndigi; k++) |
388 | digi.calls[k] = ax25_ctl.digi_addr[k]; |
389 | |
390 | ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev); |
391 | if (!ax25) { |
392 | ax25_dev_put(ax25_dev); |
393 | return -ENOTCONN; |
394 | } |
395 | |
396 | switch (ax25_ctl.cmd) { |
397 | case AX25_KILL: |
398 | ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND); |
399 | #ifdef CONFIG_AX25_DAMA_SLAVE |
400 | if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE) |
401 | ax25_dama_off(ax25); |
402 | #endif |
403 | ax25_disconnect(ax25, ENETRESET); |
404 | break; |
405 | |
406 | case AX25_WINDOW: |
407 | if (ax25->modulus == AX25_MODULUS) { |
408 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7) |
409 | goto einval_put; |
410 | } else { |
411 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63) |
412 | goto einval_put; |
413 | } |
414 | ax25->window = ax25_ctl.arg; |
415 | break; |
416 | |
417 | case AX25_T1: |
418 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ) |
419 | goto einval_put; |
420 | ax25->rtt = (ax25_ctl.arg * HZ) / 2; |
421 | ax25->t1 = ax25_ctl.arg * HZ; |
422 | break; |
423 | |
424 | case AX25_T2: |
425 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ) |
426 | goto einval_put; |
427 | ax25->t2 = ax25_ctl.arg * HZ; |
428 | break; |
429 | |
430 | case AX25_N2: |
431 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31) |
432 | goto einval_put; |
433 | ax25->n2count = 0; |
434 | ax25->n2 = ax25_ctl.arg; |
435 | break; |
436 | |
437 | case AX25_T3: |
438 | if (ax25_ctl.arg > ULONG_MAX / HZ) |
439 | goto einval_put; |
440 | ax25->t3 = ax25_ctl.arg * HZ; |
441 | break; |
442 | |
443 | case AX25_IDLE: |
444 | if (ax25_ctl.arg > ULONG_MAX / (60 * HZ)) |
445 | goto einval_put; |
446 | |
447 | ax25->idle = ax25_ctl.arg * 60 * HZ; |
448 | break; |
449 | |
450 | case AX25_PACLEN: |
451 | if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535) |
452 | goto einval_put; |
453 | ax25->paclen = ax25_ctl.arg; |
454 | break; |
455 | |
456 | default: |
457 | goto einval_put; |
458 | } |
459 | |
460 | out_put: |
461 | ax25_dev_put(ax25_dev); |
462 | ax25_cb_put(ax25); |
463 | return ret; |
464 | |
465 | einval_put: |
466 | ret = -EINVAL; |
467 | goto out_put; |
468 | } |
469 | |
470 | static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev) |
471 | { |
472 | ax25->rtt = msecs_to_jiffies(m: ax25_dev->values[AX25_VALUES_T1]) / 2; |
473 | ax25->t1 = msecs_to_jiffies(m: ax25_dev->values[AX25_VALUES_T1]); |
474 | ax25->t2 = msecs_to_jiffies(m: ax25_dev->values[AX25_VALUES_T2]); |
475 | ax25->t3 = msecs_to_jiffies(m: ax25_dev->values[AX25_VALUES_T3]); |
476 | ax25->n2 = ax25_dev->values[AX25_VALUES_N2]; |
477 | ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN]; |
478 | ax25->idle = msecs_to_jiffies(m: ax25_dev->values[AX25_VALUES_IDLE]); |
479 | ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF]; |
480 | |
481 | if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) { |
482 | ax25->modulus = AX25_EMODULUS; |
483 | ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW]; |
484 | } else { |
485 | ax25->modulus = AX25_MODULUS; |
486 | ax25->window = ax25_dev->values[AX25_VALUES_WINDOW]; |
487 | } |
488 | } |
489 | |
490 | /* |
491 | * Fill in a created AX.25 created control block with the default |
492 | * values for a particular device. |
493 | */ |
494 | void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev) |
495 | { |
496 | ax25->ax25_dev = ax25_dev; |
497 | |
498 | if (ax25->ax25_dev != NULL) { |
499 | ax25_fillin_cb_from_dev(ax25, ax25_dev); |
500 | return; |
501 | } |
502 | |
503 | /* |
504 | * No device, use kernel / AX.25 spec default values |
505 | */ |
506 | ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2; |
507 | ax25->t1 = msecs_to_jiffies(AX25_DEF_T1); |
508 | ax25->t2 = msecs_to_jiffies(AX25_DEF_T2); |
509 | ax25->t3 = msecs_to_jiffies(AX25_DEF_T3); |
510 | ax25->n2 = AX25_DEF_N2; |
511 | ax25->paclen = AX25_DEF_PACLEN; |
512 | ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE); |
513 | ax25->backoff = AX25_DEF_BACKOFF; |
514 | |
515 | if (AX25_DEF_AXDEFMODE) { |
516 | ax25->modulus = AX25_EMODULUS; |
517 | ax25->window = AX25_DEF_EWINDOW; |
518 | } else { |
519 | ax25->modulus = AX25_MODULUS; |
520 | ax25->window = AX25_DEF_WINDOW; |
521 | } |
522 | } |
523 | |
524 | /* |
525 | * Create an empty AX.25 control block. |
526 | */ |
527 | ax25_cb *ax25_create_cb(void) |
528 | { |
529 | ax25_cb *ax25; |
530 | |
531 | if ((ax25 = kzalloc(size: sizeof(*ax25), GFP_ATOMIC)) == NULL) |
532 | return NULL; |
533 | |
534 | refcount_set(r: &ax25->refcount, n: 1); |
535 | |
536 | skb_queue_head_init(list: &ax25->write_queue); |
537 | skb_queue_head_init(list: &ax25->frag_queue); |
538 | skb_queue_head_init(list: &ax25->ack_queue); |
539 | skb_queue_head_init(list: &ax25->reseq_queue); |
540 | |
541 | ax25_setup_timers(ax25); |
542 | |
543 | ax25_fillin_cb(ax25, NULL); |
544 | |
545 | ax25->state = AX25_STATE_0; |
546 | |
547 | return ax25; |
548 | } |
549 | |
550 | /* |
551 | * Handling for system calls applied via the various interfaces to an |
552 | * AX25 socket object |
553 | */ |
554 | |
555 | static int ax25_setsockopt(struct socket *sock, int level, int optname, |
556 | sockptr_t optval, unsigned int optlen) |
557 | { |
558 | struct sock *sk = sock->sk; |
559 | ax25_cb *ax25; |
560 | struct net_device *dev; |
561 | char devname[IFNAMSIZ]; |
562 | unsigned int opt; |
563 | int res = 0; |
564 | |
565 | if (level != SOL_AX25) |
566 | return -ENOPROTOOPT; |
567 | |
568 | if (optlen < sizeof(unsigned int)) |
569 | return -EINVAL; |
570 | |
571 | if (copy_from_sockptr(dst: &opt, src: optval, size: sizeof(unsigned int))) |
572 | return -EFAULT; |
573 | |
574 | lock_sock(sk); |
575 | ax25 = sk_to_ax25(sk); |
576 | |
577 | switch (optname) { |
578 | case AX25_WINDOW: |
579 | if (ax25->modulus == AX25_MODULUS) { |
580 | if (opt < 1 || opt > 7) { |
581 | res = -EINVAL; |
582 | break; |
583 | } |
584 | } else { |
585 | if (opt < 1 || opt > 63) { |
586 | res = -EINVAL; |
587 | break; |
588 | } |
589 | } |
590 | ax25->window = opt; |
591 | break; |
592 | |
593 | case AX25_T1: |
594 | if (opt < 1 || opt > UINT_MAX / HZ) { |
595 | res = -EINVAL; |
596 | break; |
597 | } |
598 | ax25->rtt = (opt * HZ) >> 1; |
599 | ax25->t1 = opt * HZ; |
600 | break; |
601 | |
602 | case AX25_T2: |
603 | if (opt < 1 || opt > UINT_MAX / HZ) { |
604 | res = -EINVAL; |
605 | break; |
606 | } |
607 | ax25->t2 = opt * HZ; |
608 | break; |
609 | |
610 | case AX25_N2: |
611 | if (opt < 1 || opt > 31) { |
612 | res = -EINVAL; |
613 | break; |
614 | } |
615 | ax25->n2 = opt; |
616 | break; |
617 | |
618 | case AX25_T3: |
619 | if (opt < 1 || opt > UINT_MAX / HZ) { |
620 | res = -EINVAL; |
621 | break; |
622 | } |
623 | ax25->t3 = opt * HZ; |
624 | break; |
625 | |
626 | case AX25_IDLE: |
627 | if (opt > UINT_MAX / (60 * HZ)) { |
628 | res = -EINVAL; |
629 | break; |
630 | } |
631 | ax25->idle = opt * 60 * HZ; |
632 | break; |
633 | |
634 | case AX25_BACKOFF: |
635 | if (opt > 2) { |
636 | res = -EINVAL; |
637 | break; |
638 | } |
639 | ax25->backoff = opt; |
640 | break; |
641 | |
642 | case AX25_EXTSEQ: |
643 | ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS; |
644 | break; |
645 | |
646 | case AX25_PIDINCL: |
647 | ax25->pidincl = opt ? 1 : 0; |
648 | break; |
649 | |
650 | case AX25_IAMDIGI: |
651 | ax25->iamdigi = opt ? 1 : 0; |
652 | break; |
653 | |
654 | case AX25_PACLEN: |
655 | if (opt < 16 || opt > 65535) { |
656 | res = -EINVAL; |
657 | break; |
658 | } |
659 | ax25->paclen = opt; |
660 | break; |
661 | |
662 | case SO_BINDTODEVICE: |
663 | if (optlen > IFNAMSIZ - 1) |
664 | optlen = IFNAMSIZ - 1; |
665 | |
666 | memset(devname, 0, sizeof(devname)); |
667 | |
668 | if (copy_from_sockptr(dst: devname, src: optval, size: optlen)) { |
669 | res = -EFAULT; |
670 | break; |
671 | } |
672 | |
673 | if (sk->sk_type == SOCK_SEQPACKET && |
674 | (sock->state != SS_UNCONNECTED || |
675 | sk->sk_state == TCP_LISTEN)) { |
676 | res = -EADDRNOTAVAIL; |
677 | break; |
678 | } |
679 | |
680 | rtnl_lock(); |
681 | dev = __dev_get_by_name(net: &init_net, name: devname); |
682 | if (!dev) { |
683 | rtnl_unlock(); |
684 | res = -ENODEV; |
685 | break; |
686 | } |
687 | |
688 | ax25->ax25_dev = ax25_dev_ax25dev(dev); |
689 | if (!ax25->ax25_dev) { |
690 | rtnl_unlock(); |
691 | res = -ENODEV; |
692 | break; |
693 | } |
694 | ax25_fillin_cb(ax25, ax25_dev: ax25->ax25_dev); |
695 | rtnl_unlock(); |
696 | break; |
697 | |
698 | default: |
699 | res = -ENOPROTOOPT; |
700 | } |
701 | release_sock(sk); |
702 | |
703 | return res; |
704 | } |
705 | |
706 | static int ax25_getsockopt(struct socket *sock, int level, int optname, |
707 | char __user *optval, int __user *optlen) |
708 | { |
709 | struct sock *sk = sock->sk; |
710 | ax25_cb *ax25; |
711 | struct ax25_dev *ax25_dev; |
712 | char devname[IFNAMSIZ]; |
713 | void *valptr; |
714 | int val = 0; |
715 | int maxlen, length; |
716 | |
717 | if (level != SOL_AX25) |
718 | return -ENOPROTOOPT; |
719 | |
720 | if (get_user(maxlen, optlen)) |
721 | return -EFAULT; |
722 | |
723 | if (maxlen < 1) |
724 | return -EFAULT; |
725 | |
726 | valptr = &val; |
727 | length = min_t(unsigned int, maxlen, sizeof(int)); |
728 | |
729 | lock_sock(sk); |
730 | ax25 = sk_to_ax25(sk); |
731 | |
732 | switch (optname) { |
733 | case AX25_WINDOW: |
734 | val = ax25->window; |
735 | break; |
736 | |
737 | case AX25_T1: |
738 | val = ax25->t1 / HZ; |
739 | break; |
740 | |
741 | case AX25_T2: |
742 | val = ax25->t2 / HZ; |
743 | break; |
744 | |
745 | case AX25_N2: |
746 | val = ax25->n2; |
747 | break; |
748 | |
749 | case AX25_T3: |
750 | val = ax25->t3 / HZ; |
751 | break; |
752 | |
753 | case AX25_IDLE: |
754 | val = ax25->idle / (60 * HZ); |
755 | break; |
756 | |
757 | case AX25_BACKOFF: |
758 | val = ax25->backoff; |
759 | break; |
760 | |
761 | case AX25_EXTSEQ: |
762 | val = (ax25->modulus == AX25_EMODULUS); |
763 | break; |
764 | |
765 | case AX25_PIDINCL: |
766 | val = ax25->pidincl; |
767 | break; |
768 | |
769 | case AX25_IAMDIGI: |
770 | val = ax25->iamdigi; |
771 | break; |
772 | |
773 | case AX25_PACLEN: |
774 | val = ax25->paclen; |
775 | break; |
776 | |
777 | case SO_BINDTODEVICE: |
778 | ax25_dev = ax25->ax25_dev; |
779 | |
780 | if (ax25_dev != NULL && ax25_dev->dev != NULL) { |
781 | strscpy(devname, ax25_dev->dev->name, sizeof(devname)); |
782 | length = strlen(devname) + 1; |
783 | } else { |
784 | *devname = '\0'; |
785 | length = 1; |
786 | } |
787 | |
788 | valptr = devname; |
789 | break; |
790 | |
791 | default: |
792 | release_sock(sk); |
793 | return -ENOPROTOOPT; |
794 | } |
795 | release_sock(sk); |
796 | |
797 | if (put_user(length, optlen)) |
798 | return -EFAULT; |
799 | |
800 | return copy_to_user(to: optval, from: valptr, n: length) ? -EFAULT : 0; |
801 | } |
802 | |
803 | static int ax25_listen(struct socket *sock, int backlog) |
804 | { |
805 | struct sock *sk = sock->sk; |
806 | int res = 0; |
807 | |
808 | lock_sock(sk); |
809 | if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) { |
810 | sk->sk_max_ack_backlog = backlog; |
811 | sk->sk_state = TCP_LISTEN; |
812 | goto out; |
813 | } |
814 | res = -EOPNOTSUPP; |
815 | |
816 | out: |
817 | release_sock(sk); |
818 | |
819 | return res; |
820 | } |
821 | |
822 | /* |
823 | * XXX: when creating ax25_sock we should update the .obj_size setting |
824 | * below. |
825 | */ |
826 | static struct proto ax25_proto = { |
827 | .name = "AX25" , |
828 | .owner = THIS_MODULE, |
829 | .obj_size = sizeof(struct ax25_sock), |
830 | }; |
831 | |
832 | static int ax25_create(struct net *net, struct socket *sock, int protocol, |
833 | int kern) |
834 | { |
835 | struct sock *sk; |
836 | ax25_cb *ax25; |
837 | |
838 | if (protocol < 0 || protocol > U8_MAX) |
839 | return -EINVAL; |
840 | |
841 | if (!net_eq(net1: net, net2: &init_net)) |
842 | return -EAFNOSUPPORT; |
843 | |
844 | switch (sock->type) { |
845 | case SOCK_DGRAM: |
846 | if (protocol == 0 || protocol == PF_AX25) |
847 | protocol = AX25_P_TEXT; |
848 | break; |
849 | |
850 | case SOCK_SEQPACKET: |
851 | switch (protocol) { |
852 | case 0: |
853 | case PF_AX25: /* For CLX */ |
854 | protocol = AX25_P_TEXT; |
855 | break; |
856 | case AX25_P_SEGMENT: |
857 | #ifdef CONFIG_INET |
858 | case AX25_P_ARP: |
859 | case AX25_P_IP: |
860 | #endif |
861 | #ifdef CONFIG_NETROM |
862 | case AX25_P_NETROM: |
863 | #endif |
864 | #ifdef CONFIG_ROSE |
865 | case AX25_P_ROSE: |
866 | #endif |
867 | return -ESOCKTNOSUPPORT; |
868 | #ifdef CONFIG_NETROM_MODULE |
869 | case AX25_P_NETROM: |
870 | if (ax25_protocol_is_registered(AX25_P_NETROM)) |
871 | return -ESOCKTNOSUPPORT; |
872 | break; |
873 | #endif |
874 | #ifdef CONFIG_ROSE_MODULE |
875 | case AX25_P_ROSE: |
876 | if (ax25_protocol_is_registered(AX25_P_ROSE)) |
877 | return -ESOCKTNOSUPPORT; |
878 | break; |
879 | #endif |
880 | default: |
881 | break; |
882 | } |
883 | break; |
884 | |
885 | case SOCK_RAW: |
886 | if (!capable(CAP_NET_RAW)) |
887 | return -EPERM; |
888 | break; |
889 | default: |
890 | return -ESOCKTNOSUPPORT; |
891 | } |
892 | |
893 | sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, prot: &ax25_proto, kern); |
894 | if (sk == NULL) |
895 | return -ENOMEM; |
896 | |
897 | ax25 = ax25_sk(sk)->cb = ax25_create_cb(); |
898 | if (!ax25) { |
899 | sk_free(sk); |
900 | return -ENOMEM; |
901 | } |
902 | |
903 | sock_init_data(sock, sk); |
904 | |
905 | sk->sk_destruct = ax25_free_sock; |
906 | sock->ops = &ax25_proto_ops; |
907 | sk->sk_protocol = protocol; |
908 | |
909 | ax25->sk = sk; |
910 | |
911 | return 0; |
912 | } |
913 | |
914 | struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev) |
915 | { |
916 | struct sock *sk; |
917 | ax25_cb *ax25, *oax25; |
918 | |
919 | sk = sk_alloc(net: sock_net(sk: osk), PF_AX25, GFP_ATOMIC, prot: osk->sk_prot, kern: 0); |
920 | if (sk == NULL) |
921 | return NULL; |
922 | |
923 | if ((ax25 = ax25_create_cb()) == NULL) { |
924 | sk_free(sk); |
925 | return NULL; |
926 | } |
927 | |
928 | switch (osk->sk_type) { |
929 | case SOCK_DGRAM: |
930 | break; |
931 | case SOCK_SEQPACKET: |
932 | break; |
933 | default: |
934 | sk_free(sk); |
935 | ax25_cb_put(ax25); |
936 | return NULL; |
937 | } |
938 | |
939 | sock_init_data(NULL, sk); |
940 | |
941 | sk->sk_type = osk->sk_type; |
942 | sk->sk_priority = READ_ONCE(osk->sk_priority); |
943 | sk->sk_protocol = osk->sk_protocol; |
944 | sk->sk_rcvbuf = osk->sk_rcvbuf; |
945 | sk->sk_sndbuf = osk->sk_sndbuf; |
946 | sk->sk_state = TCP_ESTABLISHED; |
947 | sock_copy_flags(nsk: sk, osk); |
948 | |
949 | oax25 = sk_to_ax25(sk: osk); |
950 | |
951 | ax25->modulus = oax25->modulus; |
952 | ax25->backoff = oax25->backoff; |
953 | ax25->pidincl = oax25->pidincl; |
954 | ax25->iamdigi = oax25->iamdigi; |
955 | ax25->rtt = oax25->rtt; |
956 | ax25->t1 = oax25->t1; |
957 | ax25->t2 = oax25->t2; |
958 | ax25->t3 = oax25->t3; |
959 | ax25->n2 = oax25->n2; |
960 | ax25->idle = oax25->idle; |
961 | ax25->paclen = oax25->paclen; |
962 | ax25->window = oax25->window; |
963 | |
964 | ax25->ax25_dev = ax25_dev; |
965 | ax25->source_addr = oax25->source_addr; |
966 | |
967 | if (oax25->digipeat != NULL) { |
968 | ax25->digipeat = kmemdup(p: oax25->digipeat, size: sizeof(ax25_digi), |
969 | GFP_ATOMIC); |
970 | if (ax25->digipeat == NULL) { |
971 | sk_free(sk); |
972 | ax25_cb_put(ax25); |
973 | return NULL; |
974 | } |
975 | } |
976 | |
977 | ax25_sk(sk)->cb = ax25; |
978 | sk->sk_destruct = ax25_free_sock; |
979 | ax25->sk = sk; |
980 | |
981 | return sk; |
982 | } |
983 | |
984 | static int ax25_release(struct socket *sock) |
985 | { |
986 | struct sock *sk = sock->sk; |
987 | ax25_cb *ax25; |
988 | ax25_dev *ax25_dev; |
989 | |
990 | if (sk == NULL) |
991 | return 0; |
992 | |
993 | sock_hold(sk); |
994 | lock_sock(sk); |
995 | sock_orphan(sk); |
996 | ax25 = sk_to_ax25(sk); |
997 | ax25_dev = ax25->ax25_dev; |
998 | |
999 | if (sk->sk_type == SOCK_SEQPACKET) { |
1000 | switch (ax25->state) { |
1001 | case AX25_STATE_0: |
1002 | if (!sock_flag(sk: ax25->sk, flag: SOCK_DEAD)) { |
1003 | release_sock(sk); |
1004 | ax25_disconnect(ax25, 0); |
1005 | lock_sock(sk); |
1006 | } |
1007 | ax25_destroy_socket(ax25); |
1008 | break; |
1009 | |
1010 | case AX25_STATE_1: |
1011 | case AX25_STATE_2: |
1012 | ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND); |
1013 | release_sock(sk); |
1014 | ax25_disconnect(ax25, 0); |
1015 | lock_sock(sk); |
1016 | if (!sock_flag(sk: ax25->sk, flag: SOCK_DESTROY)) |
1017 | ax25_destroy_socket(ax25); |
1018 | break; |
1019 | |
1020 | case AX25_STATE_3: |
1021 | case AX25_STATE_4: |
1022 | ax25_clear_queues(ax25); |
1023 | ax25->n2count = 0; |
1024 | |
1025 | switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) { |
1026 | case AX25_PROTO_STD_SIMPLEX: |
1027 | case AX25_PROTO_STD_DUPLEX: |
1028 | ax25_send_control(ax25, |
1029 | AX25_DISC, |
1030 | AX25_POLLON, |
1031 | AX25_COMMAND); |
1032 | ax25_stop_t2timer(ax25); |
1033 | ax25_stop_t3timer(ax25); |
1034 | ax25_stop_idletimer(ax25); |
1035 | break; |
1036 | #ifdef CONFIG_AX25_DAMA_SLAVE |
1037 | case AX25_PROTO_DAMA_SLAVE: |
1038 | ax25_stop_t3timer(ax25); |
1039 | ax25_stop_idletimer(ax25); |
1040 | break; |
1041 | #endif |
1042 | } |
1043 | ax25_calculate_t1(ax25); |
1044 | ax25_start_t1timer(ax25); |
1045 | ax25->state = AX25_STATE_2; |
1046 | sk->sk_state = TCP_CLOSE; |
1047 | sk->sk_shutdown |= SEND_SHUTDOWN; |
1048 | sk->sk_state_change(sk); |
1049 | sock_set_flag(sk, flag: SOCK_DESTROY); |
1050 | break; |
1051 | |
1052 | default: |
1053 | break; |
1054 | } |
1055 | } else { |
1056 | sk->sk_state = TCP_CLOSE; |
1057 | sk->sk_shutdown |= SEND_SHUTDOWN; |
1058 | sk->sk_state_change(sk); |
1059 | ax25_destroy_socket(ax25); |
1060 | } |
1061 | if (ax25_dev) { |
1062 | if (!ax25_dev->device_up) { |
1063 | del_timer_sync(timer: &ax25->timer); |
1064 | del_timer_sync(timer: &ax25->t1timer); |
1065 | del_timer_sync(timer: &ax25->t2timer); |
1066 | del_timer_sync(timer: &ax25->t3timer); |
1067 | del_timer_sync(timer: &ax25->idletimer); |
1068 | } |
1069 | netdev_put(dev: ax25_dev->dev, tracker: &ax25->dev_tracker); |
1070 | ax25_dev_put(ax25_dev); |
1071 | } |
1072 | |
1073 | sock->sk = NULL; |
1074 | release_sock(sk); |
1075 | sock_put(sk); |
1076 | |
1077 | return 0; |
1078 | } |
1079 | |
1080 | /* |
1081 | * We support a funny extension here so you can (as root) give any callsign |
1082 | * digipeated via a local address as source. This hack is obsolete now |
1083 | * that we've implemented support for SO_BINDTODEVICE. It is however small |
1084 | * and trivially backward compatible. |
1085 | */ |
1086 | static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
1087 | { |
1088 | struct sock *sk = sock->sk; |
1089 | struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr; |
1090 | ax25_dev *ax25_dev = NULL; |
1091 | ax25_uid_assoc *user; |
1092 | ax25_address call; |
1093 | ax25_cb *ax25; |
1094 | int err = 0; |
1095 | |
1096 | if (addr_len != sizeof(struct sockaddr_ax25) && |
1097 | addr_len != sizeof(struct full_sockaddr_ax25)) |
1098 | /* support for old structure may go away some time |
1099 | * ax25_bind(): uses old (6 digipeater) socket structure. |
1100 | */ |
1101 | if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || |
1102 | (addr_len > sizeof(struct full_sockaddr_ax25))) |
1103 | return -EINVAL; |
1104 | |
1105 | if (addr->fsa_ax25.sax25_family != AF_AX25) |
1106 | return -EINVAL; |
1107 | |
1108 | user = ax25_findbyuid(current_euid()); |
1109 | if (user) { |
1110 | call = user->call; |
1111 | ax25_uid_put(assoc: user); |
1112 | } else { |
1113 | if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) |
1114 | return -EACCES; |
1115 | |
1116 | call = addr->fsa_ax25.sax25_call; |
1117 | } |
1118 | |
1119 | lock_sock(sk); |
1120 | |
1121 | ax25 = sk_to_ax25(sk); |
1122 | if (!sock_flag(sk, flag: SOCK_ZAPPED)) { |
1123 | err = -EINVAL; |
1124 | goto out; |
1125 | } |
1126 | |
1127 | ax25->source_addr = call; |
1128 | |
1129 | /* |
1130 | * User already set interface with SO_BINDTODEVICE |
1131 | */ |
1132 | if (ax25->ax25_dev != NULL) |
1133 | goto done; |
1134 | |
1135 | if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) { |
1136 | if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 && |
1137 | (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) { |
1138 | err = -EADDRNOTAVAIL; |
1139 | goto out; |
1140 | } |
1141 | } else { |
1142 | if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) { |
1143 | err = -EADDRNOTAVAIL; |
1144 | goto out; |
1145 | } |
1146 | } |
1147 | |
1148 | if (ax25_dev) { |
1149 | ax25_fillin_cb(ax25, ax25_dev); |
1150 | netdev_hold(dev: ax25_dev->dev, tracker: &ax25->dev_tracker, GFP_ATOMIC); |
1151 | } |
1152 | |
1153 | done: |
1154 | ax25_cb_add(ax25); |
1155 | sock_reset_flag(sk, flag: SOCK_ZAPPED); |
1156 | |
1157 | out: |
1158 | release_sock(sk); |
1159 | |
1160 | return err; |
1161 | } |
1162 | |
1163 | /* |
1164 | * FIXME: nonblock behaviour looks like it may have a bug. |
1165 | */ |
1166 | static int __must_check ax25_connect(struct socket *sock, |
1167 | struct sockaddr *uaddr, int addr_len, int flags) |
1168 | { |
1169 | struct sock *sk = sock->sk; |
1170 | ax25_cb *ax25 = sk_to_ax25(sk), *ax25t; |
1171 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr; |
1172 | ax25_digi *digi = NULL; |
1173 | int ct = 0, err = 0; |
1174 | |
1175 | /* |
1176 | * some sanity checks. code further down depends on this |
1177 | */ |
1178 | |
1179 | if (addr_len == sizeof(struct sockaddr_ax25)) |
1180 | /* support for this will go away in early 2.5.x |
1181 | * ax25_connect(): uses obsolete socket structure |
1182 | */ |
1183 | ; |
1184 | else if (addr_len != sizeof(struct full_sockaddr_ax25)) |
1185 | /* support for old structure may go away some time |
1186 | * ax25_connect(): uses old (6 digipeater) socket structure. |
1187 | */ |
1188 | if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || |
1189 | (addr_len > sizeof(struct full_sockaddr_ax25))) |
1190 | return -EINVAL; |
1191 | |
1192 | |
1193 | if (fsa->fsa_ax25.sax25_family != AF_AX25) |
1194 | return -EINVAL; |
1195 | |
1196 | lock_sock(sk); |
1197 | |
1198 | /* deal with restarts */ |
1199 | if (sock->state == SS_CONNECTING) { |
1200 | switch (sk->sk_state) { |
1201 | case TCP_SYN_SENT: /* still trying */ |
1202 | err = -EINPROGRESS; |
1203 | goto out_release; |
1204 | |
1205 | case TCP_ESTABLISHED: /* connection established */ |
1206 | sock->state = SS_CONNECTED; |
1207 | goto out_release; |
1208 | |
1209 | case TCP_CLOSE: /* connection refused */ |
1210 | sock->state = SS_UNCONNECTED; |
1211 | err = -ECONNREFUSED; |
1212 | goto out_release; |
1213 | } |
1214 | } |
1215 | |
1216 | if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) { |
1217 | err = -EISCONN; /* No reconnect on a seqpacket socket */ |
1218 | goto out_release; |
1219 | } |
1220 | |
1221 | sk->sk_state = TCP_CLOSE; |
1222 | sock->state = SS_UNCONNECTED; |
1223 | |
1224 | kfree(objp: ax25->digipeat); |
1225 | ax25->digipeat = NULL; |
1226 | |
1227 | /* |
1228 | * Handle digi-peaters to be used. |
1229 | */ |
1230 | if (addr_len > sizeof(struct sockaddr_ax25) && |
1231 | fsa->fsa_ax25.sax25_ndigis != 0) { |
1232 | /* Valid number of digipeaters ? */ |
1233 | if (fsa->fsa_ax25.sax25_ndigis < 1 || |
1234 | fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS || |
1235 | addr_len < sizeof(struct sockaddr_ax25) + |
1236 | sizeof(ax25_address) * fsa->fsa_ax25.sax25_ndigis) { |
1237 | err = -EINVAL; |
1238 | goto out_release; |
1239 | } |
1240 | |
1241 | if ((digi = kmalloc(size: sizeof(ax25_digi), GFP_KERNEL)) == NULL) { |
1242 | err = -ENOBUFS; |
1243 | goto out_release; |
1244 | } |
1245 | |
1246 | digi->ndigi = fsa->fsa_ax25.sax25_ndigis; |
1247 | digi->lastrepeat = -1; |
1248 | |
1249 | while (ct < fsa->fsa_ax25.sax25_ndigis) { |
1250 | if ((fsa->fsa_digipeater[ct].ax25_call[6] & |
1251 | AX25_HBIT) && ax25->iamdigi) { |
1252 | digi->repeated[ct] = 1; |
1253 | digi->lastrepeat = ct; |
1254 | } else { |
1255 | digi->repeated[ct] = 0; |
1256 | } |
1257 | digi->calls[ct] = fsa->fsa_digipeater[ct]; |
1258 | ct++; |
1259 | } |
1260 | } |
1261 | |
1262 | /* |
1263 | * Must bind first - autobinding in this may or may not work. If |
1264 | * the socket is already bound, check to see if the device has |
1265 | * been filled in, error if it hasn't. |
1266 | */ |
1267 | if (sock_flag(sk, flag: SOCK_ZAPPED)) { |
1268 | /* check if we can remove this feature. It is broken. */ |
1269 | printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n" , |
1270 | current->comm); |
1271 | if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) { |
1272 | kfree(objp: digi); |
1273 | goto out_release; |
1274 | } |
1275 | |
1276 | ax25_fillin_cb(ax25, ax25_dev: ax25->ax25_dev); |
1277 | ax25_cb_add(ax25); |
1278 | } else { |
1279 | if (ax25->ax25_dev == NULL) { |
1280 | kfree(objp: digi); |
1281 | err = -EHOSTUNREACH; |
1282 | goto out_release; |
1283 | } |
1284 | } |
1285 | |
1286 | if (sk->sk_type == SOCK_SEQPACKET && |
1287 | (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi, |
1288 | ax25->ax25_dev->dev))) { |
1289 | kfree(objp: digi); |
1290 | err = -EADDRINUSE; /* Already such a connection */ |
1291 | ax25_cb_put(ax25: ax25t); |
1292 | goto out_release; |
1293 | } |
1294 | |
1295 | ax25->dest_addr = fsa->fsa_ax25.sax25_call; |
1296 | ax25->digipeat = digi; |
1297 | |
1298 | /* First the easy one */ |
1299 | if (sk->sk_type != SOCK_SEQPACKET) { |
1300 | sock->state = SS_CONNECTED; |
1301 | sk->sk_state = TCP_ESTABLISHED; |
1302 | goto out_release; |
1303 | } |
1304 | |
1305 | /* Move to connecting socket, ax.25 lapb WAIT_UA.. */ |
1306 | sock->state = SS_CONNECTING; |
1307 | sk->sk_state = TCP_SYN_SENT; |
1308 | |
1309 | switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) { |
1310 | case AX25_PROTO_STD_SIMPLEX: |
1311 | case AX25_PROTO_STD_DUPLEX: |
1312 | ax25_std_establish_data_link(ax25); |
1313 | break; |
1314 | |
1315 | #ifdef CONFIG_AX25_DAMA_SLAVE |
1316 | case AX25_PROTO_DAMA_SLAVE: |
1317 | ax25->modulus = AX25_MODULUS; |
1318 | ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW]; |
1319 | if (ax25->ax25_dev->dama.slave) |
1320 | ax25_ds_establish_data_link(ax25); |
1321 | else |
1322 | ax25_std_establish_data_link(ax25); |
1323 | break; |
1324 | #endif |
1325 | } |
1326 | |
1327 | ax25->state = AX25_STATE_1; |
1328 | |
1329 | ax25_start_heartbeat(ax25); |
1330 | |
1331 | /* Now the loop */ |
1332 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { |
1333 | err = -EINPROGRESS; |
1334 | goto out_release; |
1335 | } |
1336 | |
1337 | if (sk->sk_state == TCP_SYN_SENT) { |
1338 | DEFINE_WAIT(wait); |
1339 | |
1340 | for (;;) { |
1341 | prepare_to_wait(wq_head: sk_sleep(sk), wq_entry: &wait, |
1342 | TASK_INTERRUPTIBLE); |
1343 | if (sk->sk_state != TCP_SYN_SENT) |
1344 | break; |
1345 | if (!signal_pending(current)) { |
1346 | release_sock(sk); |
1347 | schedule(); |
1348 | lock_sock(sk); |
1349 | continue; |
1350 | } |
1351 | err = -ERESTARTSYS; |
1352 | break; |
1353 | } |
1354 | finish_wait(wq_head: sk_sleep(sk), wq_entry: &wait); |
1355 | |
1356 | if (err) |
1357 | goto out_release; |
1358 | } |
1359 | |
1360 | if (sk->sk_state != TCP_ESTABLISHED) { |
1361 | /* Not in ABM, not in WAIT_UA -> failed */ |
1362 | sock->state = SS_UNCONNECTED; |
1363 | err = sock_error(sk); /* Always set at this point */ |
1364 | goto out_release; |
1365 | } |
1366 | |
1367 | sock->state = SS_CONNECTED; |
1368 | |
1369 | err = 0; |
1370 | out_release: |
1371 | release_sock(sk); |
1372 | |
1373 | return err; |
1374 | } |
1375 | |
1376 | static int ax25_accept(struct socket *sock, struct socket *newsock, int flags, |
1377 | bool kern) |
1378 | { |
1379 | struct sk_buff *skb; |
1380 | struct sock *newsk; |
1381 | DEFINE_WAIT(wait); |
1382 | struct sock *sk; |
1383 | int err = 0; |
1384 | |
1385 | if (sock->state != SS_UNCONNECTED) |
1386 | return -EINVAL; |
1387 | |
1388 | if ((sk = sock->sk) == NULL) |
1389 | return -EINVAL; |
1390 | |
1391 | lock_sock(sk); |
1392 | if (sk->sk_type != SOCK_SEQPACKET) { |
1393 | err = -EOPNOTSUPP; |
1394 | goto out; |
1395 | } |
1396 | |
1397 | if (sk->sk_state != TCP_LISTEN) { |
1398 | err = -EINVAL; |
1399 | goto out; |
1400 | } |
1401 | |
1402 | /* |
1403 | * The read queue this time is holding sockets ready to use |
1404 | * hooked into the SABM we saved |
1405 | */ |
1406 | for (;;) { |
1407 | prepare_to_wait(wq_head: sk_sleep(sk), wq_entry: &wait, TASK_INTERRUPTIBLE); |
1408 | skb = skb_dequeue(list: &sk->sk_receive_queue); |
1409 | if (skb) |
1410 | break; |
1411 | |
1412 | if (flags & O_NONBLOCK) { |
1413 | err = -EWOULDBLOCK; |
1414 | break; |
1415 | } |
1416 | if (!signal_pending(current)) { |
1417 | release_sock(sk); |
1418 | schedule(); |
1419 | lock_sock(sk); |
1420 | continue; |
1421 | } |
1422 | err = -ERESTARTSYS; |
1423 | break; |
1424 | } |
1425 | finish_wait(wq_head: sk_sleep(sk), wq_entry: &wait); |
1426 | |
1427 | if (err) |
1428 | goto out; |
1429 | |
1430 | newsk = skb->sk; |
1431 | sock_graft(sk: newsk, parent: newsock); |
1432 | |
1433 | /* Now attach up the new socket */ |
1434 | kfree_skb(skb); |
1435 | sk_acceptq_removed(sk); |
1436 | newsock->state = SS_CONNECTED; |
1437 | |
1438 | out: |
1439 | release_sock(sk); |
1440 | |
1441 | return err; |
1442 | } |
1443 | |
1444 | static int ax25_getname(struct socket *sock, struct sockaddr *uaddr, |
1445 | int peer) |
1446 | { |
1447 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr; |
1448 | struct sock *sk = sock->sk; |
1449 | unsigned char ndigi, i; |
1450 | ax25_cb *ax25; |
1451 | int err = 0; |
1452 | |
1453 | memset(fsa, 0, sizeof(*fsa)); |
1454 | lock_sock(sk); |
1455 | ax25 = sk_to_ax25(sk); |
1456 | |
1457 | if (peer != 0) { |
1458 | if (sk->sk_state != TCP_ESTABLISHED) { |
1459 | err = -ENOTCONN; |
1460 | goto out; |
1461 | } |
1462 | |
1463 | fsa->fsa_ax25.sax25_family = AF_AX25; |
1464 | fsa->fsa_ax25.sax25_call = ax25->dest_addr; |
1465 | |
1466 | if (ax25->digipeat != NULL) { |
1467 | ndigi = ax25->digipeat->ndigi; |
1468 | fsa->fsa_ax25.sax25_ndigis = ndigi; |
1469 | for (i = 0; i < ndigi; i++) |
1470 | fsa->fsa_digipeater[i] = |
1471 | ax25->digipeat->calls[i]; |
1472 | } |
1473 | } else { |
1474 | fsa->fsa_ax25.sax25_family = AF_AX25; |
1475 | fsa->fsa_ax25.sax25_call = ax25->source_addr; |
1476 | fsa->fsa_ax25.sax25_ndigis = 1; |
1477 | if (ax25->ax25_dev != NULL) { |
1478 | memcpy(&fsa->fsa_digipeater[0], |
1479 | ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN); |
1480 | } else { |
1481 | fsa->fsa_digipeater[0] = null_ax25_address; |
1482 | } |
1483 | } |
1484 | err = sizeof (struct full_sockaddr_ax25); |
1485 | |
1486 | out: |
1487 | release_sock(sk); |
1488 | |
1489 | return err; |
1490 | } |
1491 | |
1492 | static int ax25_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) |
1493 | { |
1494 | DECLARE_SOCKADDR(struct sockaddr_ax25 *, usax, msg->msg_name); |
1495 | struct sock *sk = sock->sk; |
1496 | struct sockaddr_ax25 sax; |
1497 | struct sk_buff *skb; |
1498 | ax25_digi dtmp, *dp; |
1499 | ax25_cb *ax25; |
1500 | size_t size; |
1501 | int lv, err, addr_len = msg->msg_namelen; |
1502 | |
1503 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) |
1504 | return -EINVAL; |
1505 | |
1506 | lock_sock(sk); |
1507 | ax25 = sk_to_ax25(sk); |
1508 | |
1509 | if (sock_flag(sk, flag: SOCK_ZAPPED)) { |
1510 | err = -EADDRNOTAVAIL; |
1511 | goto out; |
1512 | } |
1513 | |
1514 | if (sk->sk_shutdown & SEND_SHUTDOWN) { |
1515 | send_sig(SIGPIPE, current, 0); |
1516 | err = -EPIPE; |
1517 | goto out; |
1518 | } |
1519 | |
1520 | if (ax25->ax25_dev == NULL) { |
1521 | err = -ENETUNREACH; |
1522 | goto out; |
1523 | } |
1524 | |
1525 | if (len > ax25->ax25_dev->dev->mtu) { |
1526 | err = -EMSGSIZE; |
1527 | goto out; |
1528 | } |
1529 | |
1530 | if (usax != NULL) { |
1531 | if (usax->sax25_family != AF_AX25) { |
1532 | err = -EINVAL; |
1533 | goto out; |
1534 | } |
1535 | |
1536 | if (addr_len == sizeof(struct sockaddr_ax25)) |
1537 | /* ax25_sendmsg(): uses obsolete socket structure */ |
1538 | ; |
1539 | else if (addr_len != sizeof(struct full_sockaddr_ax25)) |
1540 | /* support for old structure may go away some time |
1541 | * ax25_sendmsg(): uses old (6 digipeater) |
1542 | * socket structure. |
1543 | */ |
1544 | if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || |
1545 | (addr_len > sizeof(struct full_sockaddr_ax25))) { |
1546 | err = -EINVAL; |
1547 | goto out; |
1548 | } |
1549 | |
1550 | |
1551 | if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) { |
1552 | int ct = 0; |
1553 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax; |
1554 | |
1555 | /* Valid number of digipeaters ? */ |
1556 | if (usax->sax25_ndigis < 1 || |
1557 | usax->sax25_ndigis > AX25_MAX_DIGIS || |
1558 | addr_len < sizeof(struct sockaddr_ax25) + |
1559 | sizeof(ax25_address) * usax->sax25_ndigis) { |
1560 | err = -EINVAL; |
1561 | goto out; |
1562 | } |
1563 | |
1564 | dtmp.ndigi = usax->sax25_ndigis; |
1565 | |
1566 | while (ct < usax->sax25_ndigis) { |
1567 | dtmp.repeated[ct] = 0; |
1568 | dtmp.calls[ct] = fsa->fsa_digipeater[ct]; |
1569 | ct++; |
1570 | } |
1571 | |
1572 | dtmp.lastrepeat = 0; |
1573 | } |
1574 | |
1575 | sax = *usax; |
1576 | if (sk->sk_type == SOCK_SEQPACKET && |
1577 | ax25cmp(&ax25->dest_addr, &sax.sax25_call)) { |
1578 | err = -EISCONN; |
1579 | goto out; |
1580 | } |
1581 | if (usax->sax25_ndigis == 0) |
1582 | dp = NULL; |
1583 | else |
1584 | dp = &dtmp; |
1585 | } else { |
1586 | /* |
1587 | * FIXME: 1003.1g - if the socket is like this because |
1588 | * it has become closed (not started closed) and is VC |
1589 | * we ought to SIGPIPE, EPIPE |
1590 | */ |
1591 | if (sk->sk_state != TCP_ESTABLISHED) { |
1592 | err = -ENOTCONN; |
1593 | goto out; |
1594 | } |
1595 | sax.sax25_family = AF_AX25; |
1596 | sax.sax25_call = ax25->dest_addr; |
1597 | dp = ax25->digipeat; |
1598 | } |
1599 | |
1600 | /* Build a packet */ |
1601 | /* Assume the worst case */ |
1602 | size = len + ax25->ax25_dev->dev->hard_header_len; |
1603 | |
1604 | skb = sock_alloc_send_skb(sk, size, noblock: msg->msg_flags&MSG_DONTWAIT, errcode: &err); |
1605 | if (skb == NULL) |
1606 | goto out; |
1607 | |
1608 | skb_reserve(skb, len: size - len); |
1609 | |
1610 | /* User data follows immediately after the AX.25 data */ |
1611 | if (memcpy_from_msg(data: skb_put(skb, len), msg, len)) { |
1612 | err = -EFAULT; |
1613 | kfree_skb(skb); |
1614 | goto out; |
1615 | } |
1616 | |
1617 | skb_reset_network_header(skb); |
1618 | |
1619 | /* Add the PID if one is not supplied by the user in the skb */ |
1620 | if (!ax25->pidincl) |
1621 | *(u8 *)skb_push(skb, len: 1) = sk->sk_protocol; |
1622 | |
1623 | if (sk->sk_type == SOCK_SEQPACKET) { |
1624 | /* Connected mode sockets go via the LAPB machine */ |
1625 | if (sk->sk_state != TCP_ESTABLISHED) { |
1626 | kfree_skb(skb); |
1627 | err = -ENOTCONN; |
1628 | goto out; |
1629 | } |
1630 | |
1631 | /* Shove it onto the queue and kick */ |
1632 | ax25_output(ax25, ax25->paclen, skb); |
1633 | |
1634 | err = len; |
1635 | goto out; |
1636 | } |
1637 | |
1638 | skb_push(skb, len: 1 + ax25_addr_size(dp)); |
1639 | |
1640 | /* Building AX.25 Header */ |
1641 | |
1642 | /* Build an AX.25 header */ |
1643 | lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call, |
1644 | dp, AX25_COMMAND, AX25_MODULUS); |
1645 | |
1646 | skb_set_transport_header(skb, offset: lv); |
1647 | |
1648 | *skb_transport_header(skb) = AX25_UI; |
1649 | |
1650 | /* Datagram frames go straight out of the door as UI */ |
1651 | ax25_queue_xmit(skb, dev: ax25->ax25_dev->dev); |
1652 | |
1653 | err = len; |
1654 | |
1655 | out: |
1656 | release_sock(sk); |
1657 | |
1658 | return err; |
1659 | } |
1660 | |
1661 | static int ax25_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, |
1662 | int flags) |
1663 | { |
1664 | struct sock *sk = sock->sk; |
1665 | struct sk_buff *skb, *last; |
1666 | struct sk_buff_head *sk_queue; |
1667 | int copied; |
1668 | int err = 0; |
1669 | int off = 0; |
1670 | long timeo; |
1671 | |
1672 | lock_sock(sk); |
1673 | /* |
1674 | * This works for seqpacket too. The receiver has ordered the |
1675 | * queue for us! We do one quick check first though |
1676 | */ |
1677 | if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) { |
1678 | err = -ENOTCONN; |
1679 | goto out; |
1680 | } |
1681 | |
1682 | /* We need support for non-blocking reads. */ |
1683 | sk_queue = &sk->sk_receive_queue; |
1684 | skb = __skb_try_recv_datagram(sk, queue: sk_queue, flags, off: &off, err: &err, last: &last); |
1685 | /* If no packet is available, release_sock(sk) and try again. */ |
1686 | if (!skb) { |
1687 | if (err != -EAGAIN) |
1688 | goto out; |
1689 | release_sock(sk); |
1690 | timeo = sock_rcvtimeo(sk, noblock: flags & MSG_DONTWAIT); |
1691 | while (timeo && !__skb_wait_for_more_packets(sk, queue: sk_queue, err: &err, |
1692 | timeo_p: &timeo, skb: last)) { |
1693 | skb = __skb_try_recv_datagram(sk, queue: sk_queue, flags, off: &off, |
1694 | err: &err, last: &last); |
1695 | if (skb) |
1696 | break; |
1697 | |
1698 | if (err != -EAGAIN) |
1699 | goto done; |
1700 | } |
1701 | if (!skb) |
1702 | goto done; |
1703 | lock_sock(sk); |
1704 | } |
1705 | |
1706 | if (!sk_to_ax25(sk)->pidincl) |
1707 | skb_pull(skb, len: 1); /* Remove PID */ |
1708 | |
1709 | skb_reset_transport_header(skb); |
1710 | copied = skb->len; |
1711 | |
1712 | if (copied > size) { |
1713 | copied = size; |
1714 | msg->msg_flags |= MSG_TRUNC; |
1715 | } |
1716 | |
1717 | skb_copy_datagram_msg(from: skb, offset: 0, msg, size: copied); |
1718 | |
1719 | if (msg->msg_name) { |
1720 | ax25_digi digi; |
1721 | ax25_address src; |
1722 | const unsigned char *mac = skb_mac_header(skb); |
1723 | DECLARE_SOCKADDR(struct sockaddr_ax25 *, sax, msg->msg_name); |
1724 | |
1725 | memset(sax, 0, sizeof(struct full_sockaddr_ax25)); |
1726 | ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL, |
1727 | &digi, NULL, NULL); |
1728 | sax->sax25_family = AF_AX25; |
1729 | /* We set this correctly, even though we may not let the |
1730 | application know the digi calls further down (because it |
1731 | did NOT ask to know them). This could get political... **/ |
1732 | sax->sax25_ndigis = digi.ndigi; |
1733 | sax->sax25_call = src; |
1734 | |
1735 | if (sax->sax25_ndigis != 0) { |
1736 | int ct; |
1737 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax; |
1738 | |
1739 | for (ct = 0; ct < digi.ndigi; ct++) |
1740 | fsa->fsa_digipeater[ct] = digi.calls[ct]; |
1741 | } |
1742 | msg->msg_namelen = sizeof(struct full_sockaddr_ax25); |
1743 | } |
1744 | |
1745 | skb_free_datagram(sk, skb); |
1746 | err = copied; |
1747 | |
1748 | out: |
1749 | release_sock(sk); |
1750 | |
1751 | done: |
1752 | return err; |
1753 | } |
1754 | |
1755 | static int ax25_shutdown(struct socket *sk, int how) |
1756 | { |
1757 | /* FIXME - generate DM and RNR states */ |
1758 | return -EOPNOTSUPP; |
1759 | } |
1760 | |
1761 | static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
1762 | { |
1763 | struct sock *sk = sock->sk; |
1764 | void __user *argp = (void __user *)arg; |
1765 | int res = 0; |
1766 | |
1767 | lock_sock(sk); |
1768 | switch (cmd) { |
1769 | case TIOCOUTQ: { |
1770 | long amount; |
1771 | |
1772 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
1773 | if (amount < 0) |
1774 | amount = 0; |
1775 | res = put_user(amount, (int __user *)argp); |
1776 | break; |
1777 | } |
1778 | |
1779 | case TIOCINQ: { |
1780 | struct sk_buff *skb; |
1781 | long amount = 0L; |
1782 | /* These two are safe on a single CPU system as only user tasks fiddle here */ |
1783 | if ((skb = skb_peek(list_: &sk->sk_receive_queue)) != NULL) |
1784 | amount = skb->len; |
1785 | res = put_user(amount, (int __user *) argp); |
1786 | break; |
1787 | } |
1788 | |
1789 | case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */ |
1790 | case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */ |
1791 | case SIOCAX25GETUID: { |
1792 | struct sockaddr_ax25 sax25; |
1793 | if (copy_from_user(to: &sax25, from: argp, n: sizeof(sax25))) { |
1794 | res = -EFAULT; |
1795 | break; |
1796 | } |
1797 | res = ax25_uid_ioctl(cmd, &sax25); |
1798 | break; |
1799 | } |
1800 | |
1801 | case SIOCAX25NOUID: { /* Set the default policy (default/bar) */ |
1802 | long amount; |
1803 | if (!capable(CAP_NET_ADMIN)) { |
1804 | res = -EPERM; |
1805 | break; |
1806 | } |
1807 | if (get_user(amount, (long __user *)argp)) { |
1808 | res = -EFAULT; |
1809 | break; |
1810 | } |
1811 | if (amount < 0 || amount > AX25_NOUID_BLOCK) { |
1812 | res = -EINVAL; |
1813 | break; |
1814 | } |
1815 | ax25_uid_policy = amount; |
1816 | res = 0; |
1817 | break; |
1818 | } |
1819 | |
1820 | case SIOCADDRT: |
1821 | case SIOCDELRT: |
1822 | case SIOCAX25OPTRT: |
1823 | if (!capable(CAP_NET_ADMIN)) { |
1824 | res = -EPERM; |
1825 | break; |
1826 | } |
1827 | res = ax25_rt_ioctl(cmd, argp); |
1828 | break; |
1829 | |
1830 | case SIOCAX25CTLCON: |
1831 | if (!capable(CAP_NET_ADMIN)) { |
1832 | res = -EPERM; |
1833 | break; |
1834 | } |
1835 | res = ax25_ctl_ioctl(cmd, arg: argp); |
1836 | break; |
1837 | |
1838 | case SIOCAX25GETINFO: |
1839 | case SIOCAX25GETINFOOLD: { |
1840 | ax25_cb *ax25 = sk_to_ax25(sk); |
1841 | struct ax25_info_struct ax25_info; |
1842 | |
1843 | ax25_info.t1 = ax25->t1 / HZ; |
1844 | ax25_info.t2 = ax25->t2 / HZ; |
1845 | ax25_info.t3 = ax25->t3 / HZ; |
1846 | ax25_info.idle = ax25->idle / (60 * HZ); |
1847 | ax25_info.n2 = ax25->n2; |
1848 | ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ; |
1849 | ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ; |
1850 | ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ; |
1851 | ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ); |
1852 | ax25_info.n2count = ax25->n2count; |
1853 | ax25_info.state = ax25->state; |
1854 | ax25_info.rcv_q = sk_rmem_alloc_get(sk); |
1855 | ax25_info.snd_q = sk_wmem_alloc_get(sk); |
1856 | ax25_info.vs = ax25->vs; |
1857 | ax25_info.vr = ax25->vr; |
1858 | ax25_info.va = ax25->va; |
1859 | ax25_info.vs_max = ax25->vs; /* reserved */ |
1860 | ax25_info.paclen = ax25->paclen; |
1861 | ax25_info.window = ax25->window; |
1862 | |
1863 | /* old structure? */ |
1864 | if (cmd == SIOCAX25GETINFOOLD) { |
1865 | static int warned = 0; |
1866 | if (!warned) { |
1867 | printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n" , |
1868 | current->comm); |
1869 | warned=1; |
1870 | } |
1871 | |
1872 | if (copy_to_user(to: argp, from: &ax25_info, n: sizeof(struct ax25_info_struct_deprecated))) { |
1873 | res = -EFAULT; |
1874 | break; |
1875 | } |
1876 | } else { |
1877 | if (copy_to_user(to: argp, from: &ax25_info, n: sizeof(struct ax25_info_struct))) { |
1878 | res = -EINVAL; |
1879 | break; |
1880 | } |
1881 | } |
1882 | res = 0; |
1883 | break; |
1884 | } |
1885 | |
1886 | case SIOCAX25ADDFWD: |
1887 | case SIOCAX25DELFWD: { |
1888 | struct ax25_fwd_struct ax25_fwd; |
1889 | if (!capable(CAP_NET_ADMIN)) { |
1890 | res = -EPERM; |
1891 | break; |
1892 | } |
1893 | if (copy_from_user(to: &ax25_fwd, from: argp, n: sizeof(ax25_fwd))) { |
1894 | res = -EFAULT; |
1895 | break; |
1896 | } |
1897 | res = ax25_fwd_ioctl(cmd, &ax25_fwd); |
1898 | break; |
1899 | } |
1900 | |
1901 | case SIOCGIFADDR: |
1902 | case SIOCSIFADDR: |
1903 | case SIOCGIFDSTADDR: |
1904 | case SIOCSIFDSTADDR: |
1905 | case SIOCGIFBRDADDR: |
1906 | case SIOCSIFBRDADDR: |
1907 | case SIOCGIFNETMASK: |
1908 | case SIOCSIFNETMASK: |
1909 | case SIOCGIFMETRIC: |
1910 | case SIOCSIFMETRIC: |
1911 | res = -EINVAL; |
1912 | break; |
1913 | |
1914 | default: |
1915 | res = -ENOIOCTLCMD; |
1916 | break; |
1917 | } |
1918 | release_sock(sk); |
1919 | |
1920 | return res; |
1921 | } |
1922 | |
1923 | #ifdef CONFIG_PROC_FS |
1924 | |
1925 | static void *ax25_info_start(struct seq_file *seq, loff_t *pos) |
1926 | __acquires(ax25_list_lock) |
1927 | { |
1928 | spin_lock_bh(lock: &ax25_list_lock); |
1929 | return seq_hlist_start(head: &ax25_list, pos: *pos); |
1930 | } |
1931 | |
1932 | static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos) |
1933 | { |
1934 | return seq_hlist_next(v, head: &ax25_list, ppos: pos); |
1935 | } |
1936 | |
1937 | static void ax25_info_stop(struct seq_file *seq, void *v) |
1938 | __releases(ax25_list_lock) |
1939 | { |
1940 | spin_unlock_bh(lock: &ax25_list_lock); |
1941 | } |
1942 | |
1943 | static int ax25_info_show(struct seq_file *seq, void *v) |
1944 | { |
1945 | ax25_cb *ax25 = hlist_entry(v, struct ax25_cb, ax25_node); |
1946 | char buf[11]; |
1947 | int k; |
1948 | |
1949 | |
1950 | /* |
1951 | * New format: |
1952 | * 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 |
1953 | */ |
1954 | |
1955 | seq_printf(m: seq, fmt: "%p %s %s%s " , |
1956 | ax25, |
1957 | ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name, |
1958 | ax2asc(buf, &ax25->source_addr), |
1959 | ax25->iamdigi? "*" :"" ); |
1960 | seq_printf(m: seq, fmt: "%s" , ax2asc(buf, &ax25->dest_addr)); |
1961 | |
1962 | for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) { |
1963 | seq_printf(m: seq, fmt: ",%s%s" , |
1964 | ax2asc(buf, &ax25->digipeat->calls[k]), |
1965 | ax25->digipeat->repeated[k]? "*" :"" ); |
1966 | } |
1967 | |
1968 | seq_printf(m: seq, fmt: " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d" , |
1969 | ax25->state, |
1970 | ax25->vs, ax25->vr, ax25->va, |
1971 | ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ, |
1972 | ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ, |
1973 | ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ, |
1974 | ax25_display_timer(&ax25->idletimer) / (60 * HZ), |
1975 | ax25->idle / (60 * HZ), |
1976 | ax25->n2count, ax25->n2, |
1977 | ax25->rtt / HZ, |
1978 | ax25->window, |
1979 | ax25->paclen); |
1980 | |
1981 | if (ax25->sk != NULL) { |
1982 | seq_printf(m: seq, fmt: " %d %d %lu\n" , |
1983 | sk_wmem_alloc_get(sk: ax25->sk), |
1984 | sk_rmem_alloc_get(sk: ax25->sk), |
1985 | sock_i_ino(sk: ax25->sk)); |
1986 | } else { |
1987 | seq_puts(m: seq, s: " * * *\n" ); |
1988 | } |
1989 | return 0; |
1990 | } |
1991 | |
1992 | static const struct seq_operations ax25_info_seqops = { |
1993 | .start = ax25_info_start, |
1994 | .next = ax25_info_next, |
1995 | .stop = ax25_info_stop, |
1996 | .show = ax25_info_show, |
1997 | }; |
1998 | #endif |
1999 | |
2000 | static const struct net_proto_family ax25_family_ops = { |
2001 | .family = PF_AX25, |
2002 | .create = ax25_create, |
2003 | .owner = THIS_MODULE, |
2004 | }; |
2005 | |
2006 | static const struct proto_ops ax25_proto_ops = { |
2007 | .family = PF_AX25, |
2008 | .owner = THIS_MODULE, |
2009 | .release = ax25_release, |
2010 | .bind = ax25_bind, |
2011 | .connect = ax25_connect, |
2012 | .socketpair = sock_no_socketpair, |
2013 | .accept = ax25_accept, |
2014 | .getname = ax25_getname, |
2015 | .poll = datagram_poll, |
2016 | .ioctl = ax25_ioctl, |
2017 | .gettstamp = sock_gettstamp, |
2018 | .listen = ax25_listen, |
2019 | .shutdown = ax25_shutdown, |
2020 | .setsockopt = ax25_setsockopt, |
2021 | .getsockopt = ax25_getsockopt, |
2022 | .sendmsg = ax25_sendmsg, |
2023 | .recvmsg = ax25_recvmsg, |
2024 | .mmap = sock_no_mmap, |
2025 | }; |
2026 | |
2027 | /* |
2028 | * Called by socket.c on kernel start up |
2029 | */ |
2030 | static struct packet_type ax25_packet_type __read_mostly = { |
2031 | .type = cpu_to_be16(ETH_P_AX25), |
2032 | .func = ax25_kiss_rcv, |
2033 | }; |
2034 | |
2035 | static struct notifier_block ax25_dev_notifier = { |
2036 | .notifier_call = ax25_device_event, |
2037 | }; |
2038 | |
2039 | static int __init ax25_init(void) |
2040 | { |
2041 | int rc = proto_register(prot: &ax25_proto, alloc_slab: 0); |
2042 | |
2043 | if (rc != 0) |
2044 | goto out; |
2045 | |
2046 | sock_register(fam: &ax25_family_ops); |
2047 | dev_add_pack(pt: &ax25_packet_type); |
2048 | register_netdevice_notifier(nb: &ax25_dev_notifier); |
2049 | |
2050 | proc_create_seq("ax25_route" , 0444, init_net.proc_net, &ax25_rt_seqops); |
2051 | proc_create_seq("ax25" , 0444, init_net.proc_net, &ax25_info_seqops); |
2052 | proc_create_seq("ax25_calls" , 0444, init_net.proc_net, |
2053 | &ax25_uid_seqops); |
2054 | out: |
2055 | return rc; |
2056 | } |
2057 | module_init(ax25_init); |
2058 | |
2059 | |
2060 | MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>" ); |
2061 | MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol" ); |
2062 | MODULE_LICENSE("GPL" ); |
2063 | MODULE_ALIAS_NETPROTO(PF_AX25); |
2064 | |
2065 | static void __exit ax25_exit(void) |
2066 | { |
2067 | remove_proc_entry("ax25_route" , init_net.proc_net); |
2068 | remove_proc_entry("ax25" , init_net.proc_net); |
2069 | remove_proc_entry("ax25_calls" , init_net.proc_net); |
2070 | |
2071 | unregister_netdevice_notifier(nb: &ax25_dev_notifier); |
2072 | |
2073 | dev_remove_pack(pt: &ax25_packet_type); |
2074 | |
2075 | sock_unregister(PF_AX25); |
2076 | proto_unregister(prot: &ax25_proto); |
2077 | |
2078 | ax25_rt_free(); |
2079 | ax25_uid_free(); |
2080 | ax25_dev_free(); |
2081 | } |
2082 | module_exit(ax25_exit); |
2083 | |