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1da177e4 LT |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify | |
3 | * it under the terms of the GNU General Public License as published by | |
4 | * the Free Software Foundation; either version 2 of the License, or | |
5 | * (at your option) any later version. | |
6 | * | |
7 | * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk) | |
8 | * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) | |
9 | * Copyright (C) Darryl Miles G7LED (dlm@g7led.demon.co.uk) | |
10 | * Copyright (C) Steven Whitehouse GW7RRM (stevew@acm.org) | |
11 | * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de) | |
12 | * Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de) | |
13 | * Copyright (C) Hans Alblas PE1AYX (hans@esrac.ele.tue.nl) | |
14 | * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr) | |
15 | */ | |
4fc268d2 | 16 | #include <linux/capability.h> |
1da177e4 LT |
17 | #include <linux/module.h> |
18 | #include <linux/errno.h> | |
19 | #include <linux/types.h> | |
20 | #include <linux/socket.h> | |
21 | #include <linux/in.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/sched.h> | |
24 | #include <linux/timer.h> | |
25 | #include <linux/string.h> | |
1da177e4 LT |
26 | #include <linux/sockios.h> |
27 | #include <linux/net.h> | |
28 | #include <net/ax25.h> | |
29 | #include <linux/inet.h> | |
30 | #include <linux/netdevice.h> | |
31 | #include <linux/if_arp.h> | |
32 | #include <linux/skbuff.h> | |
33 | #include <net/sock.h> | |
34 | #include <asm/uaccess.h> | |
35 | #include <asm/system.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> | |
457c4cbc | 47 | #include <net/net_namespace.h> |
c752f073 | 48 | #include <net/tcp_states.h> |
1da177e4 LT |
49 | #include <net/ip.h> |
50 | #include <net/arp.h> | |
51 | ||
52 | ||
53 | ||
54 | HLIST_HEAD(ax25_list); | |
55 | DEFINE_SPINLOCK(ax25_list_lock); | |
56 | ||
90ddc4f0 | 57 | static const struct proto_ops ax25_proto_ops; |
1da177e4 LT |
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); | |
ecd2ebde | 90 | again: |
1da177e4 LT |
91 | ax25_for_each(s, node, &ax25_list) { |
92 | if (s->ax25_dev == ax25_dev) { | |
93 | s->ax25_dev = NULL; | |
ecd2ebde | 94 | spin_unlock_bh(&ax25_list_lock); |
1da177e4 | 95 | ax25_disconnect(s, ENETUNREACH); |
ecd2ebde JP |
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; | |
1da177e4 LT |
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 | ||
721499e8 | 119 | if (!net_eq(dev_net(dev), &init_net)) |
e9dc8653 EB |
120 | return NOTIFY_DONE; |
121 | ||
1da177e4 LT |
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 | ||
c19c4b9c | 163 | spin_lock(&ax25_list_lock); |
1da177e4 LT |
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); | |
c19c4b9c | 172 | spin_unlock(&ax25_list_lock); |
1da177e4 LT |
173 | return s->sk; |
174 | } | |
175 | } | |
176 | } | |
c19c4b9c | 177 | spin_unlock(&ax25_list_lock); |
1da177e4 LT |
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 | ||
c19c4b9c | 192 | spin_lock(&ax25_list_lock); |
1da177e4 LT |
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 | ||
c19c4b9c | 203 | spin_unlock(&ax25_list_lock); |
1da177e4 LT |
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 | ||
70868eac RB |
245 | EXPORT_SYMBOL(ax25_find_cb); |
246 | ||
1da177e4 LT |
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 | ||
c19c4b9c | 253 | spin_lock(&ax25_list_lock); |
1da177e4 LT |
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 | } | |
c19c4b9c | 266 | spin_unlock(&ax25_list_lock); |
1da177e4 LT |
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; | |
528930b9 | 281 | |
1da177e4 | 282 | sk=ax25->sk; |
528930b9 | 283 | |
1da177e4 LT |
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 | ax25_start_heartbeat(sax25); | |
321 | sax25->state = AX25_STATE_0; | |
322 | } | |
323 | ||
324 | kfree_skb(skb); | |
325 | } | |
326 | skb_queue_purge(&ax25->sk->sk_write_queue); | |
327 | } | |
328 | ||
329 | if (ax25->sk != NULL) { | |
330 | if (atomic_read(&ax25->sk->sk_wmem_alloc) || | |
331 | atomic_read(&ax25->sk->sk_rmem_alloc)) { | |
332 | /* Defer: outstanding buffers */ | |
b24b8a24 PE |
333 | setup_timer(&ax25->dtimer, ax25_destroy_timer, |
334 | (unsigned long)ax25); | |
1da177e4 | 335 | ax25->dtimer.expires = jiffies + 2 * HZ; |
1da177e4 LT |
336 | add_timer(&ax25->dtimer); |
337 | } else { | |
338 | struct sock *sk=ax25->sk; | |
339 | ax25->sk=NULL; | |
340 | sock_put(sk); | |
341 | } | |
342 | } else { | |
343 | ax25_cb_put(ax25); | |
344 | } | |
345 | } | |
346 | ||
347 | /* | |
348 | * dl1bke 960311: set parameters for existing AX.25 connections, | |
349 | * includes a KILL command to abort any connection. | |
350 | * VERY useful for debugging ;-) | |
351 | */ | |
352 | static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg) | |
353 | { | |
354 | struct ax25_ctl_struct ax25_ctl; | |
355 | ax25_digi digi; | |
356 | ax25_dev *ax25_dev; | |
357 | ax25_cb *ax25; | |
358 | unsigned int k; | |
359 | ||
360 | if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl))) | |
361 | return -EFAULT; | |
362 | ||
363 | if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL) | |
364 | return -ENODEV; | |
365 | ||
366 | if (ax25_ctl.digi_count > AX25_MAX_DIGIS) | |
367 | return -EINVAL; | |
368 | ||
369 | digi.ndigi = ax25_ctl.digi_count; | |
370 | for (k = 0; k < digi.ndigi; k++) | |
371 | digi.calls[k] = ax25_ctl.digi_addr[k]; | |
372 | ||
373 | if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL) | |
374 | return -ENOTCONN; | |
375 | ||
376 | switch (ax25_ctl.cmd) { | |
377 | case AX25_KILL: | |
378 | ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND); | |
379 | #ifdef CONFIG_AX25_DAMA_SLAVE | |
380 | if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE) | |
381 | ax25_dama_off(ax25); | |
382 | #endif | |
383 | ax25_disconnect(ax25, ENETRESET); | |
384 | break; | |
385 | ||
528930b9 YH |
386 | case AX25_WINDOW: |
387 | if (ax25->modulus == AX25_MODULUS) { | |
388 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7) | |
389 | return -EINVAL; | |
390 | } else { | |
391 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63) | |
392 | return -EINVAL; | |
393 | } | |
394 | ax25->window = ax25_ctl.arg; | |
395 | break; | |
396 | ||
397 | case AX25_T1: | |
1da177e4 | 398 | if (ax25_ctl.arg < 1) |
1da177e4 | 399 | return -EINVAL; |
528930b9 YH |
400 | ax25->rtt = (ax25_ctl.arg * HZ) / 2; |
401 | ax25->t1 = ax25_ctl.arg * HZ; | |
402 | break; | |
403 | ||
404 | case AX25_T2: | |
405 | if (ax25_ctl.arg < 1) | |
406 | return -EINVAL; | |
407 | ax25->t2 = ax25_ctl.arg * HZ; | |
408 | break; | |
409 | ||
410 | case AX25_N2: | |
411 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31) | |
412 | return -EINVAL; | |
413 | ax25->n2count = 0; | |
414 | ax25->n2 = ax25_ctl.arg; | |
415 | break; | |
416 | ||
417 | case AX25_T3: | |
418 | if (ax25_ctl.arg < 0) | |
419 | return -EINVAL; | |
420 | ax25->t3 = ax25_ctl.arg * HZ; | |
421 | break; | |
422 | ||
423 | case AX25_IDLE: | |
424 | if (ax25_ctl.arg < 0) | |
425 | return -EINVAL; | |
426 | ax25->idle = ax25_ctl.arg * 60 * HZ; | |
427 | break; | |
428 | ||
429 | case AX25_PACLEN: | |
430 | if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535) | |
431 | return -EINVAL; | |
432 | ax25->paclen = ax25_ctl.arg; | |
433 | break; | |
434 | ||
435 | default: | |
436 | return -EINVAL; | |
1da177e4 LT |
437 | } |
438 | ||
439 | return 0; | |
440 | } | |
441 | ||
e1fdb5b3 RB |
442 | static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev) |
443 | { | |
444 | ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2; | |
445 | ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]); | |
446 | ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]); | |
447 | ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]); | |
448 | ax25->n2 = ax25_dev->values[AX25_VALUES_N2]; | |
449 | ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN]; | |
450 | ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]); | |
451 | ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF]; | |
452 | ||
453 | if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) { | |
454 | ax25->modulus = AX25_EMODULUS; | |
455 | ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW]; | |
456 | } else { | |
457 | ax25->modulus = AX25_MODULUS; | |
458 | ax25->window = ax25_dev->values[AX25_VALUES_WINDOW]; | |
459 | } | |
460 | } | |
461 | ||
1da177e4 LT |
462 | /* |
463 | * Fill in a created AX.25 created control block with the default | |
464 | * values for a particular device. | |
465 | */ | |
466 | void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev) | |
467 | { | |
468 | ax25->ax25_dev = ax25_dev; | |
469 | ||
470 | if (ax25->ax25_dev != NULL) { | |
e1fdb5b3 RB |
471 | ax25_fillin_cb_from_dev(ax25, ax25_dev); |
472 | return; | |
473 | } | |
474 | ||
475 | /* | |
476 | * No device, use kernel / AX.25 spec default values | |
477 | */ | |
478 | ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2; | |
479 | ax25->t1 = msecs_to_jiffies(AX25_DEF_T1); | |
480 | ax25->t2 = msecs_to_jiffies(AX25_DEF_T2); | |
481 | ax25->t3 = msecs_to_jiffies(AX25_DEF_T3); | |
482 | ax25->n2 = AX25_DEF_N2; | |
483 | ax25->paclen = AX25_DEF_PACLEN; | |
484 | ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE); | |
485 | ax25->backoff = AX25_DEF_BACKOFF; | |
486 | ||
487 | if (AX25_DEF_AXDEFMODE) { | |
488 | ax25->modulus = AX25_EMODULUS; | |
489 | ax25->window = AX25_DEF_EWINDOW; | |
1da177e4 | 490 | } else { |
e1fdb5b3 RB |
491 | ax25->modulus = AX25_MODULUS; |
492 | ax25->window = AX25_DEF_WINDOW; | |
1da177e4 LT |
493 | } |
494 | } | |
495 | ||
496 | /* | |
497 | * Create an empty AX.25 control block. | |
498 | */ | |
499 | ax25_cb *ax25_create_cb(void) | |
500 | { | |
501 | ax25_cb *ax25; | |
502 | ||
1b30dd35 | 503 | if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
504 | return NULL; |
505 | ||
1da177e4 LT |
506 | atomic_set(&ax25->refcount, 1); |
507 | ||
508 | skb_queue_head_init(&ax25->write_queue); | |
509 | skb_queue_head_init(&ax25->frag_queue); | |
510 | skb_queue_head_init(&ax25->ack_queue); | |
511 | skb_queue_head_init(&ax25->reseq_queue); | |
512 | ||
21fab4a8 | 513 | ax25_setup_timers(ax25); |
1da177e4 LT |
514 | |
515 | ax25_fillin_cb(ax25, NULL); | |
516 | ||
517 | ax25->state = AX25_STATE_0; | |
518 | ||
519 | return ax25; | |
520 | } | |
521 | ||
522 | /* | |
523 | * Handling for system calls applied via the various interfaces to an | |
524 | * AX25 socket object | |
525 | */ | |
526 | ||
527 | static int ax25_setsockopt(struct socket *sock, int level, int optname, | |
528 | char __user *optval, int optlen) | |
529 | { | |
530 | struct sock *sk = sock->sk; | |
531 | ax25_cb *ax25; | |
532 | struct net_device *dev; | |
533 | char devname[IFNAMSIZ]; | |
534 | int opt, res = 0; | |
535 | ||
536 | if (level != SOL_AX25) | |
537 | return -ENOPROTOOPT; | |
538 | ||
539 | if (optlen < sizeof(int)) | |
540 | return -EINVAL; | |
541 | ||
542 | if (get_user(opt, (int __user *)optval)) | |
543 | return -EFAULT; | |
544 | ||
545 | lock_sock(sk); | |
546 | ax25 = ax25_sk(sk); | |
547 | ||
548 | switch (optname) { | |
549 | case AX25_WINDOW: | |
550 | if (ax25->modulus == AX25_MODULUS) { | |
551 | if (opt < 1 || opt > 7) { | |
552 | res = -EINVAL; | |
553 | break; | |
554 | } | |
555 | } else { | |
556 | if (opt < 1 || opt > 63) { | |
557 | res = -EINVAL; | |
558 | break; | |
559 | } | |
560 | } | |
561 | ax25->window = opt; | |
562 | break; | |
563 | ||
564 | case AX25_T1: | |
565 | if (opt < 1) { | |
566 | res = -EINVAL; | |
567 | break; | |
568 | } | |
f16f3026 | 569 | ax25->rtt = (opt * HZ) >> 1; |
1da177e4 LT |
570 | ax25->t1 = opt * HZ; |
571 | break; | |
572 | ||
573 | case AX25_T2: | |
574 | if (opt < 1) { | |
575 | res = -EINVAL; | |
576 | break; | |
577 | } | |
578 | ax25->t2 = opt * HZ; | |
579 | break; | |
580 | ||
581 | case AX25_N2: | |
582 | if (opt < 1 || opt > 31) { | |
583 | res = -EINVAL; | |
584 | break; | |
585 | } | |
586 | ax25->n2 = opt; | |
587 | break; | |
588 | ||
589 | case AX25_T3: | |
590 | if (opt < 1) { | |
591 | res = -EINVAL; | |
592 | break; | |
593 | } | |
594 | ax25->t3 = opt * HZ; | |
595 | break; | |
596 | ||
597 | case AX25_IDLE: | |
598 | if (opt < 0) { | |
599 | res = -EINVAL; | |
600 | break; | |
601 | } | |
602 | ax25->idle = opt * 60 * HZ; | |
603 | break; | |
604 | ||
605 | case AX25_BACKOFF: | |
606 | if (opt < 0 || opt > 2) { | |
607 | res = -EINVAL; | |
608 | break; | |
609 | } | |
610 | ax25->backoff = opt; | |
611 | break; | |
612 | ||
613 | case AX25_EXTSEQ: | |
614 | ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS; | |
615 | break; | |
616 | ||
617 | case AX25_PIDINCL: | |
618 | ax25->pidincl = opt ? 1 : 0; | |
619 | break; | |
620 | ||
621 | case AX25_IAMDIGI: | |
622 | ax25->iamdigi = opt ? 1 : 0; | |
623 | break; | |
624 | ||
625 | case AX25_PACLEN: | |
626 | if (opt < 16 || opt > 65535) { | |
627 | res = -EINVAL; | |
628 | break; | |
629 | } | |
630 | ax25->paclen = opt; | |
631 | break; | |
632 | ||
633 | case SO_BINDTODEVICE: | |
634 | if (optlen > IFNAMSIZ) | |
635 | optlen=IFNAMSIZ; | |
636 | if (copy_from_user(devname, optval, optlen)) { | |
637 | res = -EFAULT; | |
638 | break; | |
639 | } | |
640 | ||
881d966b | 641 | dev = dev_get_by_name(&init_net, devname); |
1da177e4 LT |
642 | if (dev == NULL) { |
643 | res = -ENODEV; | |
644 | break; | |
645 | } | |
646 | ||
647 | if (sk->sk_type == SOCK_SEQPACKET && | |
648 | (sock->state != SS_UNCONNECTED || | |
649 | sk->sk_state == TCP_LISTEN)) { | |
650 | res = -EADDRNOTAVAIL; | |
651 | dev_put(dev); | |
652 | break; | |
653 | } | |
654 | ||
655 | ax25->ax25_dev = ax25_dev_ax25dev(dev); | |
656 | ax25_fillin_cb(ax25, ax25->ax25_dev); | |
657 | break; | |
658 | ||
659 | default: | |
660 | res = -ENOPROTOOPT; | |
661 | } | |
662 | release_sock(sk); | |
663 | ||
664 | return res; | |
665 | } | |
666 | ||
667 | static int ax25_getsockopt(struct socket *sock, int level, int optname, | |
668 | char __user *optval, int __user *optlen) | |
669 | { | |
670 | struct sock *sk = sock->sk; | |
671 | ax25_cb *ax25; | |
672 | struct ax25_dev *ax25_dev; | |
673 | char devname[IFNAMSIZ]; | |
674 | void *valptr; | |
675 | int val = 0; | |
676 | int maxlen, length; | |
677 | ||
678 | if (level != SOL_AX25) | |
679 | return -ENOPROTOOPT; | |
680 | ||
681 | if (get_user(maxlen, optlen)) | |
682 | return -EFAULT; | |
683 | ||
684 | if (maxlen < 1) | |
685 | return -EFAULT; | |
686 | ||
687 | valptr = (void *) &val; | |
688 | length = min_t(unsigned int, maxlen, sizeof(int)); | |
689 | ||
690 | lock_sock(sk); | |
691 | ax25 = ax25_sk(sk); | |
692 | ||
693 | switch (optname) { | |
694 | case AX25_WINDOW: | |
695 | val = ax25->window; | |
696 | break; | |
697 | ||
698 | case AX25_T1: | |
699 | val = ax25->t1 / HZ; | |
700 | break; | |
701 | ||
702 | case AX25_T2: | |
703 | val = ax25->t2 / HZ; | |
704 | break; | |
705 | ||
706 | case AX25_N2: | |
707 | val = ax25->n2; | |
708 | break; | |
709 | ||
710 | case AX25_T3: | |
711 | val = ax25->t3 / HZ; | |
712 | break; | |
713 | ||
714 | case AX25_IDLE: | |
715 | val = ax25->idle / (60 * HZ); | |
716 | break; | |
717 | ||
718 | case AX25_BACKOFF: | |
719 | val = ax25->backoff; | |
720 | break; | |
721 | ||
722 | case AX25_EXTSEQ: | |
723 | val = (ax25->modulus == AX25_EMODULUS); | |
724 | break; | |
725 | ||
726 | case AX25_PIDINCL: | |
727 | val = ax25->pidincl; | |
728 | break; | |
729 | ||
730 | case AX25_IAMDIGI: | |
731 | val = ax25->iamdigi; | |
732 | break; | |
733 | ||
734 | case AX25_PACLEN: | |
735 | val = ax25->paclen; | |
736 | break; | |
737 | ||
738 | case SO_BINDTODEVICE: | |
739 | ax25_dev = ax25->ax25_dev; | |
740 | ||
741 | if (ax25_dev != NULL && ax25_dev->dev != NULL) { | |
742 | strlcpy(devname, ax25_dev->dev->name, sizeof(devname)); | |
743 | length = strlen(devname) + 1; | |
744 | } else { | |
745 | *devname = '\0'; | |
746 | length = 1; | |
747 | } | |
748 | ||
749 | valptr = (void *) devname; | |
750 | break; | |
751 | ||
752 | default: | |
753 | release_sock(sk); | |
754 | return -ENOPROTOOPT; | |
755 | } | |
756 | release_sock(sk); | |
757 | ||
758 | if (put_user(length, optlen)) | |
759 | return -EFAULT; | |
760 | ||
761 | return copy_to_user(optval, valptr, length) ? -EFAULT : 0; | |
762 | } | |
763 | ||
764 | static int ax25_listen(struct socket *sock, int backlog) | |
765 | { | |
766 | struct sock *sk = sock->sk; | |
767 | int res = 0; | |
768 | ||
769 | lock_sock(sk); | |
770 | if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) { | |
771 | sk->sk_max_ack_backlog = backlog; | |
772 | sk->sk_state = TCP_LISTEN; | |
773 | goto out; | |
774 | } | |
775 | res = -EOPNOTSUPP; | |
776 | ||
777 | out: | |
778 | release_sock(sk); | |
779 | ||
780 | return res; | |
781 | } | |
782 | ||
783 | /* | |
784 | * XXX: when creating ax25_sock we should update the .obj_size setting | |
785 | * below. | |
786 | */ | |
787 | static struct proto ax25_proto = { | |
788 | .name = "AX25", | |
789 | .owner = THIS_MODULE, | |
790 | .obj_size = sizeof(struct sock), | |
791 | }; | |
792 | ||
1b8d7ae4 | 793 | static int ax25_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
794 | { |
795 | struct sock *sk; | |
796 | ax25_cb *ax25; | |
797 | ||
1b8d7ae4 EB |
798 | if (net != &init_net) |
799 | return -EAFNOSUPPORT; | |
800 | ||
1da177e4 LT |
801 | switch (sock->type) { |
802 | case SOCK_DGRAM: | |
803 | if (protocol == 0 || protocol == PF_AX25) | |
804 | protocol = AX25_P_TEXT; | |
805 | break; | |
806 | ||
807 | case SOCK_SEQPACKET: | |
808 | switch (protocol) { | |
809 | case 0: | |
810 | case PF_AX25: /* For CLX */ | |
811 | protocol = AX25_P_TEXT; | |
812 | break; | |
813 | case AX25_P_SEGMENT: | |
814 | #ifdef CONFIG_INET | |
815 | case AX25_P_ARP: | |
816 | case AX25_P_IP: | |
817 | #endif | |
818 | #ifdef CONFIG_NETROM | |
819 | case AX25_P_NETROM: | |
820 | #endif | |
821 | #ifdef CONFIG_ROSE | |
822 | case AX25_P_ROSE: | |
823 | #endif | |
824 | return -ESOCKTNOSUPPORT; | |
825 | #ifdef CONFIG_NETROM_MODULE | |
826 | case AX25_P_NETROM: | |
827 | if (ax25_protocol_is_registered(AX25_P_NETROM)) | |
828 | return -ESOCKTNOSUPPORT; | |
829 | #endif | |
830 | #ifdef CONFIG_ROSE_MODULE | |
831 | case AX25_P_ROSE: | |
832 | if (ax25_protocol_is_registered(AX25_P_ROSE)) | |
833 | return -ESOCKTNOSUPPORT; | |
834 | #endif | |
835 | default: | |
836 | break; | |
837 | } | |
838 | break; | |
839 | ||
840 | case SOCK_RAW: | |
841 | break; | |
842 | default: | |
843 | return -ESOCKTNOSUPPORT; | |
844 | } | |
845 | ||
6257ff21 PE |
846 | sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto); |
847 | if (sk == NULL) | |
1da177e4 LT |
848 | return -ENOMEM; |
849 | ||
850 | ax25 = sk->sk_protinfo = ax25_create_cb(); | |
851 | if (!ax25) { | |
852 | sk_free(sk); | |
853 | return -ENOMEM; | |
854 | } | |
855 | ||
856 | sock_init_data(sock, sk); | |
857 | ||
858 | sk->sk_destruct = ax25_free_sock; | |
859 | sock->ops = &ax25_proto_ops; | |
860 | sk->sk_protocol = protocol; | |
861 | ||
862 | ax25->sk = sk; | |
863 | ||
864 | return 0; | |
865 | } | |
866 | ||
867 | struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev) | |
868 | { | |
869 | struct sock *sk; | |
870 | ax25_cb *ax25, *oax25; | |
871 | ||
3b1e0a65 | 872 | sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot); |
6257ff21 | 873 | if (sk == NULL) |
1da177e4 LT |
874 | return NULL; |
875 | ||
876 | if ((ax25 = ax25_create_cb()) == NULL) { | |
877 | sk_free(sk); | |
878 | return NULL; | |
879 | } | |
880 | ||
881 | switch (osk->sk_type) { | |
882 | case SOCK_DGRAM: | |
883 | break; | |
884 | case SOCK_SEQPACKET: | |
885 | break; | |
886 | default: | |
887 | sk_free(sk); | |
888 | ax25_cb_put(ax25); | |
889 | return NULL; | |
890 | } | |
891 | ||
892 | sock_init_data(NULL, sk); | |
893 | ||
894 | sk->sk_destruct = ax25_free_sock; | |
895 | sk->sk_type = osk->sk_type; | |
1da177e4 LT |
896 | sk->sk_priority = osk->sk_priority; |
897 | sk->sk_protocol = osk->sk_protocol; | |
898 | sk->sk_rcvbuf = osk->sk_rcvbuf; | |
899 | sk->sk_sndbuf = osk->sk_sndbuf; | |
900 | sk->sk_state = TCP_ESTABLISHED; | |
53b924b3 | 901 | sock_copy_flags(sk, osk); |
1da177e4 LT |
902 | |
903 | oax25 = ax25_sk(osk); | |
904 | ||
905 | ax25->modulus = oax25->modulus; | |
906 | ax25->backoff = oax25->backoff; | |
907 | ax25->pidincl = oax25->pidincl; | |
908 | ax25->iamdigi = oax25->iamdigi; | |
909 | ax25->rtt = oax25->rtt; | |
910 | ax25->t1 = oax25->t1; | |
911 | ax25->t2 = oax25->t2; | |
912 | ax25->t3 = oax25->t3; | |
913 | ax25->n2 = oax25->n2; | |
914 | ax25->idle = oax25->idle; | |
915 | ax25->paclen = oax25->paclen; | |
916 | ax25->window = oax25->window; | |
917 | ||
918 | ax25->ax25_dev = ax25_dev; | |
919 | ax25->source_addr = oax25->source_addr; | |
920 | ||
921 | if (oax25->digipeat != NULL) { | |
0459d70a ACM |
922 | ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi), |
923 | GFP_ATOMIC); | |
924 | if (ax25->digipeat == NULL) { | |
1da177e4 LT |
925 | sk_free(sk); |
926 | ax25_cb_put(ax25); | |
927 | return NULL; | |
928 | } | |
1da177e4 LT |
929 | } |
930 | ||
931 | sk->sk_protinfo = ax25; | |
932 | ax25->sk = sk; | |
933 | ||
934 | return sk; | |
935 | } | |
936 | ||
937 | static int ax25_release(struct socket *sock) | |
938 | { | |
939 | struct sock *sk = sock->sk; | |
940 | ax25_cb *ax25; | |
941 | ||
942 | if (sk == NULL) | |
943 | return 0; | |
944 | ||
945 | sock_hold(sk); | |
946 | sock_orphan(sk); | |
947 | lock_sock(sk); | |
948 | ax25 = ax25_sk(sk); | |
949 | ||
950 | if (sk->sk_type == SOCK_SEQPACKET) { | |
951 | switch (ax25->state) { | |
952 | case AX25_STATE_0: | |
953 | release_sock(sk); | |
954 | ax25_disconnect(ax25, 0); | |
955 | lock_sock(sk); | |
956 | ax25_destroy_socket(ax25); | |
957 | break; | |
958 | ||
959 | case AX25_STATE_1: | |
960 | case AX25_STATE_2: | |
961 | ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND); | |
962 | release_sock(sk); | |
963 | ax25_disconnect(ax25, 0); | |
964 | lock_sock(sk); | |
965 | ax25_destroy_socket(ax25); | |
966 | break; | |
967 | ||
968 | case AX25_STATE_3: | |
969 | case AX25_STATE_4: | |
970 | ax25_clear_queues(ax25); | |
971 | ax25->n2count = 0; | |
972 | ||
973 | switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) { | |
974 | case AX25_PROTO_STD_SIMPLEX: | |
975 | case AX25_PROTO_STD_DUPLEX: | |
976 | ax25_send_control(ax25, | |
977 | AX25_DISC, | |
978 | AX25_POLLON, | |
979 | AX25_COMMAND); | |
980 | ax25_stop_t2timer(ax25); | |
981 | ax25_stop_t3timer(ax25); | |
982 | ax25_stop_idletimer(ax25); | |
983 | break; | |
984 | #ifdef CONFIG_AX25_DAMA_SLAVE | |
985 | case AX25_PROTO_DAMA_SLAVE: | |
986 | ax25_stop_t3timer(ax25); | |
987 | ax25_stop_idletimer(ax25); | |
988 | break; | |
989 | #endif | |
990 | } | |
991 | ax25_calculate_t1(ax25); | |
992 | ax25_start_t1timer(ax25); | |
993 | ax25->state = AX25_STATE_2; | |
994 | sk->sk_state = TCP_CLOSE; | |
995 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
996 | sk->sk_state_change(sk); | |
997 | sock_set_flag(sk, SOCK_DESTROY); | |
998 | break; | |
999 | ||
1000 | default: | |
1001 | break; | |
1002 | } | |
1003 | } else { | |
1004 | sk->sk_state = TCP_CLOSE; | |
1005 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
1006 | sk->sk_state_change(sk); | |
1007 | ax25_destroy_socket(ax25); | |
1008 | } | |
1009 | ||
1010 | sock->sk = NULL; | |
1011 | release_sock(sk); | |
1012 | sock_put(sk); | |
1013 | ||
1014 | return 0; | |
1015 | } | |
1016 | ||
1017 | /* | |
1018 | * We support a funny extension here so you can (as root) give any callsign | |
1019 | * digipeated via a local address as source. This hack is obsolete now | |
1020 | * that we've implemented support for SO_BINDTODEVICE. It is however small | |
1021 | * and trivially backward compatible. | |
1022 | */ | |
1023 | static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
1024 | { | |
1025 | struct sock *sk = sock->sk; | |
1026 | struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr; | |
1027 | ax25_dev *ax25_dev = NULL; | |
01d7dd0e RB |
1028 | ax25_uid_assoc *user; |
1029 | ax25_address call; | |
1da177e4 LT |
1030 | ax25_cb *ax25; |
1031 | int err = 0; | |
1032 | ||
1033 | if (addr_len != sizeof(struct sockaddr_ax25) && | |
1987e7b4 | 1034 | addr_len != sizeof(struct full_sockaddr_ax25)) |
1035 | /* support for old structure may go away some time | |
1036 | * ax25_bind(): uses old (6 digipeater) socket structure. | |
1037 | */ | |
1da177e4 | 1038 | if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || |
1987e7b4 | 1039 | (addr_len > sizeof(struct full_sockaddr_ax25))) |
1da177e4 | 1040 | return -EINVAL; |
1da177e4 LT |
1041 | |
1042 | if (addr->fsa_ax25.sax25_family != AF_AX25) | |
1043 | return -EINVAL; | |
1044 | ||
01d7dd0e RB |
1045 | user = ax25_findbyuid(current->euid); |
1046 | if (user) { | |
1047 | call = user->call; | |
1048 | ax25_uid_put(user); | |
1049 | } else { | |
1050 | if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) | |
1051 | return -EACCES; | |
1052 | ||
1053 | call = addr->fsa_ax25.sax25_call; | |
1da177e4 LT |
1054 | } |
1055 | ||
1056 | lock_sock(sk); | |
1057 | ||
1058 | ax25 = ax25_sk(sk); | |
1059 | if (!sock_flag(sk, SOCK_ZAPPED)) { | |
1060 | err = -EINVAL; | |
1061 | goto out; | |
1062 | } | |
1063 | ||
01d7dd0e | 1064 | ax25->source_addr = call; |
1da177e4 LT |
1065 | |
1066 | /* | |
1067 | * User already set interface with SO_BINDTODEVICE | |
1068 | */ | |
1069 | if (ax25->ax25_dev != NULL) | |
1070 | goto done; | |
1071 | ||
1072 | if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) { | |
1073 | if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 && | |
1074 | (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) { | |
1075 | err = -EADDRNOTAVAIL; | |
1076 | goto out; | |
1077 | } | |
1078 | } else { | |
1079 | if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) { | |
1080 | err = -EADDRNOTAVAIL; | |
1081 | goto out; | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | if (ax25_dev != NULL) | |
1086 | ax25_fillin_cb(ax25, ax25_dev); | |
1087 | ||
1088 | done: | |
1089 | ax25_cb_add(ax25); | |
1090 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1091 | ||
1092 | out: | |
1093 | release_sock(sk); | |
1094 | ||
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | /* | |
1099 | * FIXME: nonblock behaviour looks like it may have a bug. | |
1100 | */ | |
c9266b99 RB |
1101 | static int __must_check ax25_connect(struct socket *sock, |
1102 | struct sockaddr *uaddr, int addr_len, int flags) | |
1da177e4 LT |
1103 | { |
1104 | struct sock *sk = sock->sk; | |
1105 | ax25_cb *ax25 = ax25_sk(sk), *ax25t; | |
1106 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr; | |
1107 | ax25_digi *digi = NULL; | |
1108 | int ct = 0, err = 0; | |
1109 | ||
1110 | /* | |
1111 | * some sanity checks. code further down depends on this | |
1112 | */ | |
1113 | ||
27d1cba2 | 1114 | if (addr_len == sizeof(struct sockaddr_ax25)) |
1115 | /* support for this will go away in early 2.5.x | |
1116 | * ax25_connect(): uses obsolete socket structure | |
1117 | */ | |
1118 | ; | |
1119 | else if (addr_len != sizeof(struct full_sockaddr_ax25)) | |
1120 | /* support for old structure may go away some time | |
1121 | * ax25_connect(): uses old (6 digipeater) socket structure. | |
1122 | */ | |
1da177e4 | 1123 | if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || |
27d1cba2 | 1124 | (addr_len > sizeof(struct full_sockaddr_ax25))) |
1da177e4 | 1125 | return -EINVAL; |
1da177e4 | 1126 | |
1da177e4 LT |
1127 | |
1128 | if (fsa->fsa_ax25.sax25_family != AF_AX25) | |
1129 | return -EINVAL; | |
1130 | ||
1131 | lock_sock(sk); | |
1132 | ||
1133 | /* deal with restarts */ | |
1134 | if (sock->state == SS_CONNECTING) { | |
1135 | switch (sk->sk_state) { | |
1136 | case TCP_SYN_SENT: /* still trying */ | |
1137 | err = -EINPROGRESS; | |
75606dc6 | 1138 | goto out_release; |
1da177e4 LT |
1139 | |
1140 | case TCP_ESTABLISHED: /* connection established */ | |
1141 | sock->state = SS_CONNECTED; | |
75606dc6 | 1142 | goto out_release; |
1da177e4 LT |
1143 | |
1144 | case TCP_CLOSE: /* connection refused */ | |
1145 | sock->state = SS_UNCONNECTED; | |
1146 | err = -ECONNREFUSED; | |
75606dc6 | 1147 | goto out_release; |
1da177e4 LT |
1148 | } |
1149 | } | |
1150 | ||
1151 | if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) { | |
1152 | err = -EISCONN; /* No reconnect on a seqpacket socket */ | |
75606dc6 | 1153 | goto out_release; |
1da177e4 LT |
1154 | } |
1155 | ||
1156 | sk->sk_state = TCP_CLOSE; | |
1157 | sock->state = SS_UNCONNECTED; | |
1158 | ||
a51482bd JJ |
1159 | kfree(ax25->digipeat); |
1160 | ax25->digipeat = NULL; | |
1da177e4 LT |
1161 | |
1162 | /* | |
1163 | * Handle digi-peaters to be used. | |
1164 | */ | |
1165 | if (addr_len > sizeof(struct sockaddr_ax25) && | |
1166 | fsa->fsa_ax25.sax25_ndigis != 0) { | |
1167 | /* Valid number of digipeaters ? */ | |
1168 | if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) { | |
1169 | err = -EINVAL; | |
75606dc6 | 1170 | goto out_release; |
1da177e4 LT |
1171 | } |
1172 | ||
1173 | if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) { | |
1174 | err = -ENOBUFS; | |
75606dc6 | 1175 | goto out_release; |
1da177e4 LT |
1176 | } |
1177 | ||
1178 | digi->ndigi = fsa->fsa_ax25.sax25_ndigis; | |
1179 | digi->lastrepeat = -1; | |
1180 | ||
1181 | while (ct < fsa->fsa_ax25.sax25_ndigis) { | |
1182 | if ((fsa->fsa_digipeater[ct].ax25_call[6] & | |
1183 | AX25_HBIT) && ax25->iamdigi) { | |
1184 | digi->repeated[ct] = 1; | |
1185 | digi->lastrepeat = ct; | |
1186 | } else { | |
1187 | digi->repeated[ct] = 0; | |
1188 | } | |
1189 | digi->calls[ct] = fsa->fsa_digipeater[ct]; | |
1190 | ct++; | |
1191 | } | |
1192 | } | |
1193 | ||
1194 | /* | |
1195 | * Must bind first - autobinding in this may or may not work. If | |
1196 | * the socket is already bound, check to see if the device has | |
1197 | * been filled in, error if it hasn't. | |
1198 | */ | |
1199 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
1200 | /* check if we can remove this feature. It is broken. */ | |
1201 | printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n", | |
1202 | current->comm); | |
1203 | if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) { | |
1204 | kfree(digi); | |
75606dc6 | 1205 | goto out_release; |
1da177e4 LT |
1206 | } |
1207 | ||
1208 | ax25_fillin_cb(ax25, ax25->ax25_dev); | |
1209 | ax25_cb_add(ax25); | |
1210 | } else { | |
1211 | if (ax25->ax25_dev == NULL) { | |
1212 | kfree(digi); | |
1213 | err = -EHOSTUNREACH; | |
75606dc6 | 1214 | goto out_release; |
1da177e4 LT |
1215 | } |
1216 | } | |
1217 | ||
1218 | if (sk->sk_type == SOCK_SEQPACKET && | |
1219 | (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi, | |
528930b9 | 1220 | ax25->ax25_dev->dev))) { |
1da177e4 LT |
1221 | kfree(digi); |
1222 | err = -EADDRINUSE; /* Already such a connection */ | |
1223 | ax25_cb_put(ax25t); | |
75606dc6 | 1224 | goto out_release; |
1da177e4 LT |
1225 | } |
1226 | ||
1227 | ax25->dest_addr = fsa->fsa_ax25.sax25_call; | |
1228 | ax25->digipeat = digi; | |
1229 | ||
1230 | /* First the easy one */ | |
1231 | if (sk->sk_type != SOCK_SEQPACKET) { | |
1232 | sock->state = SS_CONNECTED; | |
1233 | sk->sk_state = TCP_ESTABLISHED; | |
75606dc6 | 1234 | goto out_release; |
1da177e4 LT |
1235 | } |
1236 | ||
1237 | /* Move to connecting socket, ax.25 lapb WAIT_UA.. */ | |
1238 | sock->state = SS_CONNECTING; | |
1239 | sk->sk_state = TCP_SYN_SENT; | |
1240 | ||
1241 | switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) { | |
1242 | case AX25_PROTO_STD_SIMPLEX: | |
1243 | case AX25_PROTO_STD_DUPLEX: | |
1244 | ax25_std_establish_data_link(ax25); | |
1245 | break; | |
1246 | ||
1247 | #ifdef CONFIG_AX25_DAMA_SLAVE | |
1248 | case AX25_PROTO_DAMA_SLAVE: | |
1249 | ax25->modulus = AX25_MODULUS; | |
1250 | ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW]; | |
1251 | if (ax25->ax25_dev->dama.slave) | |
1252 | ax25_ds_establish_data_link(ax25); | |
1253 | else | |
1254 | ax25_std_establish_data_link(ax25); | |
1255 | break; | |
1256 | #endif | |
1257 | } | |
1258 | ||
1259 | ax25->state = AX25_STATE_1; | |
1260 | ||
1261 | ax25_start_heartbeat(ax25); | |
1262 | ||
1263 | /* Now the loop */ | |
1264 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { | |
1265 | err = -EINPROGRESS; | |
75606dc6 | 1266 | goto out_release; |
1da177e4 LT |
1267 | } |
1268 | ||
1269 | if (sk->sk_state == TCP_SYN_SENT) { | |
75606dc6 | 1270 | DEFINE_WAIT(wait); |
1da177e4 | 1271 | |
1da177e4 | 1272 | for (;;) { |
75606dc6 | 1273 | prepare_to_wait(sk->sk_sleep, &wait, |
bd3b071b | 1274 | TASK_INTERRUPTIBLE); |
1da177e4 LT |
1275 | if (sk->sk_state != TCP_SYN_SENT) |
1276 | break; | |
75606dc6 RB |
1277 | if (!signal_pending(current)) { |
1278 | release_sock(sk); | |
1da177e4 LT |
1279 | schedule(); |
1280 | lock_sock(sk); | |
1281 | continue; | |
1282 | } | |
75606dc6 RB |
1283 | err = -ERESTARTSYS; |
1284 | break; | |
1da177e4 | 1285 | } |
75606dc6 RB |
1286 | finish_wait(sk->sk_sleep, &wait); |
1287 | ||
1288 | if (err) | |
1289 | goto out_release; | |
1da177e4 LT |
1290 | } |
1291 | ||
1292 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1293 | /* Not in ABM, not in WAIT_UA -> failed */ | |
1294 | sock->state = SS_UNCONNECTED; | |
1295 | err = sock_error(sk); /* Always set at this point */ | |
75606dc6 | 1296 | goto out_release; |
1da177e4 LT |
1297 | } |
1298 | ||
1299 | sock->state = SS_CONNECTED; | |
1300 | ||
75606dc6 RB |
1301 | err = 0; |
1302 | out_release: | |
1da177e4 LT |
1303 | release_sock(sk); |
1304 | ||
1305 | return err; | |
1306 | } | |
1307 | ||
1da177e4 LT |
1308 | static int ax25_accept(struct socket *sock, struct socket *newsock, int flags) |
1309 | { | |
1da177e4 LT |
1310 | struct sk_buff *skb; |
1311 | struct sock *newsk; | |
75606dc6 | 1312 | DEFINE_WAIT(wait); |
1da177e4 LT |
1313 | struct sock *sk; |
1314 | int err = 0; | |
1315 | ||
1316 | if (sock->state != SS_UNCONNECTED) | |
1317 | return -EINVAL; | |
1318 | ||
1319 | if ((sk = sock->sk) == NULL) | |
1320 | return -EINVAL; | |
1321 | ||
1322 | lock_sock(sk); | |
1323 | if (sk->sk_type != SOCK_SEQPACKET) { | |
1324 | err = -EOPNOTSUPP; | |
1325 | goto out; | |
1326 | } | |
1327 | ||
1328 | if (sk->sk_state != TCP_LISTEN) { | |
1329 | err = -EINVAL; | |
1330 | goto out; | |
1331 | } | |
1332 | ||
1333 | /* | |
1334 | * The read queue this time is holding sockets ready to use | |
1335 | * hooked into the SABM we saved | |
1336 | */ | |
1da177e4 | 1337 | for (;;) { |
75606dc6 | 1338 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
1339 | skb = skb_dequeue(&sk->sk_receive_queue); |
1340 | if (skb) | |
1341 | break; | |
1342 | ||
1da177e4 | 1343 | if (flags & O_NONBLOCK) { |
75606dc6 RB |
1344 | err = -EWOULDBLOCK; |
1345 | break; | |
1da177e4 | 1346 | } |
75606dc6 RB |
1347 | if (!signal_pending(current)) { |
1348 | release_sock(sk); | |
1da177e4 LT |
1349 | schedule(); |
1350 | lock_sock(sk); | |
1351 | continue; | |
1352 | } | |
75606dc6 RB |
1353 | err = -ERESTARTSYS; |
1354 | break; | |
1da177e4 | 1355 | } |
75606dc6 RB |
1356 | finish_wait(sk->sk_sleep, &wait); |
1357 | ||
1358 | if (err) | |
1359 | goto out; | |
1da177e4 LT |
1360 | |
1361 | newsk = skb->sk; | |
9375cb8a | 1362 | sock_graft(newsk, newsock); |
1da177e4 LT |
1363 | |
1364 | /* Now attach up the new socket */ | |
1365 | kfree_skb(skb); | |
1366 | sk->sk_ack_backlog--; | |
1da177e4 LT |
1367 | newsock->state = SS_CONNECTED; |
1368 | ||
1369 | out: | |
1370 | release_sock(sk); | |
1371 | ||
1372 | return err; | |
1373 | } | |
1374 | ||
1375 | static int ax25_getname(struct socket *sock, struct sockaddr *uaddr, | |
1376 | int *uaddr_len, int peer) | |
1377 | { | |
1378 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr; | |
1379 | struct sock *sk = sock->sk; | |
1380 | unsigned char ndigi, i; | |
1381 | ax25_cb *ax25; | |
1382 | int err = 0; | |
1383 | ||
1384 | lock_sock(sk); | |
1385 | ax25 = ax25_sk(sk); | |
1386 | ||
1387 | if (peer != 0) { | |
1388 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1389 | err = -ENOTCONN; | |
1390 | goto out; | |
1391 | } | |
1392 | ||
1393 | fsa->fsa_ax25.sax25_family = AF_AX25; | |
1394 | fsa->fsa_ax25.sax25_call = ax25->dest_addr; | |
1395 | fsa->fsa_ax25.sax25_ndigis = 0; | |
1396 | ||
1397 | if (ax25->digipeat != NULL) { | |
1398 | ndigi = ax25->digipeat->ndigi; | |
1399 | fsa->fsa_ax25.sax25_ndigis = ndigi; | |
1400 | for (i = 0; i < ndigi; i++) | |
1401 | fsa->fsa_digipeater[i] = | |
1402 | ax25->digipeat->calls[i]; | |
1403 | } | |
1404 | } else { | |
1405 | fsa->fsa_ax25.sax25_family = AF_AX25; | |
1406 | fsa->fsa_ax25.sax25_call = ax25->source_addr; | |
1407 | fsa->fsa_ax25.sax25_ndigis = 1; | |
1408 | if (ax25->ax25_dev != NULL) { | |
1409 | memcpy(&fsa->fsa_digipeater[0], | |
1410 | ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN); | |
1411 | } else { | |
1412 | fsa->fsa_digipeater[0] = null_ax25_address; | |
1413 | } | |
1414 | } | |
1415 | *uaddr_len = sizeof (struct full_sockaddr_ax25); | |
1416 | ||
1417 | out: | |
1418 | release_sock(sk); | |
1419 | ||
1420 | return err; | |
1421 | } | |
1422 | ||
1423 | static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1424 | struct msghdr *msg, size_t len) | |
1425 | { | |
1426 | struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name; | |
1427 | struct sock *sk = sock->sk; | |
1428 | struct sockaddr_ax25 sax; | |
1429 | struct sk_buff *skb; | |
1430 | ax25_digi dtmp, *dp; | |
1da177e4 LT |
1431 | ax25_cb *ax25; |
1432 | size_t size; | |
1433 | int lv, err, addr_len = msg->msg_namelen; | |
1434 | ||
1435 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) | |
1436 | return -EINVAL; | |
1437 | ||
1438 | lock_sock(sk); | |
1439 | ax25 = ax25_sk(sk); | |
1440 | ||
1441 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
1442 | err = -EADDRNOTAVAIL; | |
1443 | goto out; | |
1444 | } | |
1445 | ||
1446 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1447 | send_sig(SIGPIPE, current, 0); | |
1448 | err = -EPIPE; | |
1449 | goto out; | |
1450 | } | |
1451 | ||
1452 | if (ax25->ax25_dev == NULL) { | |
1453 | err = -ENETUNREACH; | |
1454 | goto out; | |
1455 | } | |
1456 | ||
1457 | if (len > ax25->ax25_dev->dev->mtu) { | |
1458 | err = -EMSGSIZE; | |
1459 | goto out; | |
1460 | } | |
528930b9 | 1461 | |
1da177e4 LT |
1462 | if (usax != NULL) { |
1463 | if (usax->sax25_family != AF_AX25) { | |
1464 | err = -EINVAL; | |
1465 | goto out; | |
1466 | } | |
1467 | ||
27d1cba2 | 1468 | if (addr_len == sizeof(struct sockaddr_ax25)) |
1469 | /* ax25_sendmsg(): uses obsolete socket structure */ | |
1470 | ; | |
1471 | else if (addr_len != sizeof(struct full_sockaddr_ax25)) | |
1472 | /* support for old structure may go away some time | |
1473 | * ax25_sendmsg(): uses old (6 digipeater) | |
1474 | * socket structure. | |
1475 | */ | |
1da177e4 | 1476 | if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || |
528930b9 YH |
1477 | (addr_len > sizeof(struct full_sockaddr_ax25))) { |
1478 | err = -EINVAL; | |
1da177e4 LT |
1479 | goto out; |
1480 | } | |
1481 | ||
1da177e4 LT |
1482 | |
1483 | if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) { | |
1484 | int ct = 0; | |
1485 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax; | |
1486 | ||
1487 | /* Valid number of digipeaters ? */ | |
1488 | if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) { | |
1489 | err = -EINVAL; | |
1490 | goto out; | |
1491 | } | |
1492 | ||
1493 | dtmp.ndigi = usax->sax25_ndigis; | |
1494 | ||
1495 | while (ct < usax->sax25_ndigis) { | |
1496 | dtmp.repeated[ct] = 0; | |
1497 | dtmp.calls[ct] = fsa->fsa_digipeater[ct]; | |
1498 | ct++; | |
1499 | } | |
1500 | ||
1501 | dtmp.lastrepeat = 0; | |
1502 | } | |
1503 | ||
1504 | sax = *usax; | |
1505 | if (sk->sk_type == SOCK_SEQPACKET && | |
1506 | ax25cmp(&ax25->dest_addr, &sax.sax25_call)) { | |
1507 | err = -EISCONN; | |
1508 | goto out; | |
1509 | } | |
1510 | if (usax->sax25_ndigis == 0) | |
1511 | dp = NULL; | |
1512 | else | |
1513 | dp = &dtmp; | |
1514 | } else { | |
1515 | /* | |
1516 | * FIXME: 1003.1g - if the socket is like this because | |
1517 | * it has become closed (not started closed) and is VC | |
1518 | * we ought to SIGPIPE, EPIPE | |
1519 | */ | |
1520 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1521 | err = -ENOTCONN; | |
1522 | goto out; | |
1523 | } | |
1524 | sax.sax25_family = AF_AX25; | |
1525 | sax.sax25_call = ax25->dest_addr; | |
1526 | dp = ax25->digipeat; | |
1527 | } | |
1528 | ||
1529 | SOCK_DEBUG(sk, "AX.25: sendto: Addresses built.\n"); | |
1530 | ||
1531 | /* Build a packet */ | |
1532 | SOCK_DEBUG(sk, "AX.25: sendto: building packet.\n"); | |
1533 | ||
1534 | /* Assume the worst case */ | |
1535 | size = len + ax25->ax25_dev->dev->hard_header_len; | |
1536 | ||
1537 | skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err); | |
1538 | if (skb == NULL) | |
1539 | goto out; | |
1540 | ||
1541 | skb_reserve(skb, size - len); | |
1542 | ||
1543 | SOCK_DEBUG(sk, "AX.25: Appending user data\n"); | |
1544 | ||
1545 | /* User data follows immediately after the AX.25 data */ | |
1546 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { | |
1547 | err = -EFAULT; | |
1548 | kfree_skb(skb); | |
1549 | goto out; | |
1550 | } | |
1551 | ||
c1d2bbe1 | 1552 | skb_reset_network_header(skb); |
1da177e4 LT |
1553 | |
1554 | /* Add the PID if one is not supplied by the user in the skb */ | |
967b05f6 ACM |
1555 | if (!ax25->pidincl) |
1556 | *skb_push(skb, 1) = sk->sk_protocol; | |
1da177e4 LT |
1557 | |
1558 | SOCK_DEBUG(sk, "AX.25: Transmitting buffer\n"); | |
1559 | ||
1560 | if (sk->sk_type == SOCK_SEQPACKET) { | |
1561 | /* Connected mode sockets go via the LAPB machine */ | |
1562 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1563 | kfree_skb(skb); | |
1564 | err = -ENOTCONN; | |
1565 | goto out; | |
1566 | } | |
1567 | ||
1568 | /* Shove it onto the queue and kick */ | |
1569 | ax25_output(ax25, ax25->paclen, skb); | |
1570 | ||
1571 | err = len; | |
1572 | goto out; | |
1573 | } | |
1574 | ||
967b05f6 | 1575 | skb_push(skb, 1 + ax25_addr_size(dp)); |
1da177e4 LT |
1576 | |
1577 | SOCK_DEBUG(sk, "Building AX.25 Header (dp=%p).\n", dp); | |
1578 | ||
1579 | if (dp != NULL) | |
1580 | SOCK_DEBUG(sk, "Num digipeaters=%d\n", dp->ndigi); | |
1581 | ||
1582 | /* Build an AX.25 header */ | |
967b05f6 ACM |
1583 | lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call, |
1584 | dp, AX25_COMMAND, AX25_MODULUS); | |
1da177e4 LT |
1585 | |
1586 | SOCK_DEBUG(sk, "Built header (%d bytes)\n",lv); | |
1587 | ||
967b05f6 | 1588 | skb_set_transport_header(skb, lv); |
1da177e4 | 1589 | |
9c70220b ACM |
1590 | SOCK_DEBUG(sk, "base=%p pos=%p\n", |
1591 | skb->data, skb_transport_header(skb)); | |
1da177e4 | 1592 | |
9c70220b | 1593 | *skb_transport_header(skb) = AX25_UI; |
1da177e4 LT |
1594 | |
1595 | /* Datagram frames go straight out of the door as UI */ | |
29c4be51 | 1596 | ax25_queue_xmit(skb, ax25->ax25_dev->dev); |
1da177e4 LT |
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, | |
528930b9 | 1626 | flags & MSG_DONTWAIT, &err); |
1da177e4 LT |
1627 | if (skb == NULL) |
1628 | goto out; | |
1629 | ||
1630 | if (!ax25_sk(sk)->pidincl) | |
1631 | skb_pull(skb, 1); /* Remove PID */ | |
1632 | ||
badff6d0 ACM |
1633 | skb_reset_transport_header(skb); |
1634 | copied = skb->len; | |
1da177e4 LT |
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; | |
98e399f8 | 1647 | const unsigned char *mac = skb_mac_header(skb); |
1da177e4 | 1648 | |
98e399f8 ACM |
1649 | ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL, |
1650 | &digi, NULL, NULL); | |
1da177e4 LT |
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 | amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); | |
1694 | if (amount < 0) | |
1695 | amount = 0; | |
1696 | res = put_user(amount, (int __user *)argp); | |
1697 | break; | |
1698 | } | |
1699 | ||
1700 | case TIOCINQ: { | |
1701 | struct sk_buff *skb; | |
1702 | long amount = 0L; | |
1703 | /* These two are safe on a single CPU system as only user tasks fiddle here */ | |
1704 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) | |
1705 | amount = skb->len; | |
20b7d10a | 1706 | res = put_user(amount, (int __user *) argp); |
1da177e4 LT |
1707 | break; |
1708 | } | |
1709 | ||
1710 | case SIOCGSTAMP: | |
9b37ee75 | 1711 | res = sock_get_timestamp(sk, argp); |
1da177e4 LT |
1712 | break; |
1713 | ||
ae40eb1e ED |
1714 | case SIOCGSTAMPNS: |
1715 | res = sock_get_timestampns(sk, argp); | |
1716 | break; | |
1717 | ||
1da177e4 LT |
1718 | case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */ |
1719 | case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */ | |
1720 | case SIOCAX25GETUID: { | |
1721 | struct sockaddr_ax25 sax25; | |
1722 | if (copy_from_user(&sax25, argp, sizeof(sax25))) { | |
1723 | res = -EFAULT; | |
1724 | break; | |
1725 | } | |
1726 | res = ax25_uid_ioctl(cmd, &sax25); | |
1727 | break; | |
1728 | } | |
1729 | ||
1730 | case SIOCAX25NOUID: { /* Set the default policy (default/bar) */ | |
1731 | long amount; | |
1732 | if (!capable(CAP_NET_ADMIN)) { | |
1733 | res = -EPERM; | |
1734 | break; | |
1735 | } | |
1736 | if (get_user(amount, (long __user *)argp)) { | |
1737 | res = -EFAULT; | |
1738 | break; | |
1739 | } | |
1740 | if (amount > AX25_NOUID_BLOCK) { | |
1741 | res = -EINVAL; | |
1742 | break; | |
1743 | } | |
1744 | ax25_uid_policy = amount; | |
1745 | res = 0; | |
1746 | break; | |
1747 | } | |
1748 | ||
1749 | case SIOCADDRT: | |
1750 | case SIOCDELRT: | |
1751 | case SIOCAX25OPTRT: | |
1752 | if (!capable(CAP_NET_ADMIN)) { | |
1753 | res = -EPERM; | |
1754 | break; | |
1755 | } | |
1756 | res = ax25_rt_ioctl(cmd, argp); | |
1757 | break; | |
1758 | ||
1759 | case SIOCAX25CTLCON: | |
1760 | if (!capable(CAP_NET_ADMIN)) { | |
1761 | res = -EPERM; | |
1762 | break; | |
1763 | } | |
1764 | res = ax25_ctl_ioctl(cmd, argp); | |
1765 | break; | |
1766 | ||
1767 | case SIOCAX25GETINFO: | |
1768 | case SIOCAX25GETINFOOLD: { | |
1769 | ax25_cb *ax25 = ax25_sk(sk); | |
1770 | struct ax25_info_struct ax25_info; | |
1771 | ||
1772 | ax25_info.t1 = ax25->t1 / HZ; | |
1773 | ax25_info.t2 = ax25->t2 / HZ; | |
1774 | ax25_info.t3 = ax25->t3 / HZ; | |
1775 | ax25_info.idle = ax25->idle / (60 * HZ); | |
1776 | ax25_info.n2 = ax25->n2; | |
1777 | ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ; | |
1778 | ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ; | |
1779 | ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ; | |
1780 | ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ); | |
1781 | ax25_info.n2count = ax25->n2count; | |
1782 | ax25_info.state = ax25->state; | |
1783 | ax25_info.rcv_q = atomic_read(&sk->sk_rmem_alloc); | |
1784 | ax25_info.snd_q = atomic_read(&sk->sk_wmem_alloc); | |
1785 | ax25_info.vs = ax25->vs; | |
1786 | ax25_info.vr = ax25->vr; | |
1787 | ax25_info.va = ax25->va; | |
1788 | ax25_info.vs_max = ax25->vs; /* reserved */ | |
1789 | ax25_info.paclen = ax25->paclen; | |
1790 | ax25_info.window = ax25->window; | |
1791 | ||
1792 | /* old structure? */ | |
1793 | if (cmd == SIOCAX25GETINFOOLD) { | |
1794 | static int warned = 0; | |
1795 | if (!warned) { | |
1796 | printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n", | |
1797 | current->comm); | |
1798 | warned=1; | |
1799 | } | |
1800 | ||
1801 | if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) { | |
1802 | res = -EFAULT; | |
1803 | break; | |
1804 | } | |
1805 | } else { | |
1806 | if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) { | |
1807 | res = -EINVAL; | |
1808 | break; | |
1809 | } | |
1810 | } | |
1811 | res = 0; | |
1812 | break; | |
1813 | } | |
1814 | ||
1815 | case SIOCAX25ADDFWD: | |
1816 | case SIOCAX25DELFWD: { | |
1817 | struct ax25_fwd_struct ax25_fwd; | |
1818 | if (!capable(CAP_NET_ADMIN)) { | |
1819 | res = -EPERM; | |
1820 | break; | |
1821 | } | |
1822 | if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) { | |
1823 | res = -EFAULT; | |
1824 | break; | |
1825 | } | |
1826 | res = ax25_fwd_ioctl(cmd, &ax25_fwd); | |
1827 | break; | |
1828 | } | |
1829 | ||
1830 | case SIOCGIFADDR: | |
1831 | case SIOCSIFADDR: | |
1832 | case SIOCGIFDSTADDR: | |
1833 | case SIOCSIFDSTADDR: | |
1834 | case SIOCGIFBRDADDR: | |
1835 | case SIOCSIFBRDADDR: | |
1836 | case SIOCGIFNETMASK: | |
1837 | case SIOCSIFNETMASK: | |
1838 | case SIOCGIFMETRIC: | |
1839 | case SIOCSIFMETRIC: | |
1840 | res = -EINVAL; | |
1841 | break; | |
1842 | ||
1843 | default: | |
b5e5fa5e | 1844 | res = -ENOIOCTLCMD; |
1da177e4 LT |
1845 | break; |
1846 | } | |
1847 | release_sock(sk); | |
1848 | ||
1849 | return res; | |
1850 | } | |
1851 | ||
1852 | #ifdef CONFIG_PROC_FS | |
1853 | ||
1854 | static void *ax25_info_start(struct seq_file *seq, loff_t *pos) | |
f16f3026 | 1855 | __acquires(ax25_list_lock) |
1da177e4 LT |
1856 | { |
1857 | struct ax25_cb *ax25; | |
1858 | struct hlist_node *node; | |
1859 | int i = 0; | |
1860 | ||
1861 | spin_lock_bh(&ax25_list_lock); | |
1862 | ax25_for_each(ax25, node, &ax25_list) { | |
1863 | if (i == *pos) | |
1864 | return ax25; | |
1865 | ++i; | |
1866 | } | |
1867 | return NULL; | |
1868 | } | |
1869 | ||
1870 | static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos) | |
1871 | { | |
1872 | ++*pos; | |
1873 | ||
1874 | return hlist_entry( ((struct ax25_cb *)v)->ax25_node.next, | |
1875 | struct ax25_cb, ax25_node); | |
1876 | } | |
528930b9 | 1877 | |
1da177e4 | 1878 | static void ax25_info_stop(struct seq_file *seq, void *v) |
f16f3026 | 1879 | __releases(ax25_list_lock) |
1da177e4 LT |
1880 | { |
1881 | spin_unlock_bh(&ax25_list_lock); | |
1882 | } | |
1883 | ||
1884 | static int ax25_info_show(struct seq_file *seq, void *v) | |
1885 | { | |
1886 | ax25_cb *ax25 = v; | |
f75268cd | 1887 | char buf[11]; |
1da177e4 LT |
1888 | int k; |
1889 | ||
1890 | ||
1891 | /* | |
1892 | * New format: | |
1893 | * 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 | |
1894 | */ | |
1895 | ||
1896 | seq_printf(seq, "%8.8lx %s %s%s ", | |
1897 | (long) ax25, | |
1898 | ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name, | |
f75268cd | 1899 | ax2asc(buf, &ax25->source_addr), |
1da177e4 | 1900 | ax25->iamdigi? "*":""); |
f75268cd | 1901 | seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr)); |
1da177e4 LT |
1902 | |
1903 | for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) { | |
1904 | seq_printf(seq, ",%s%s", | |
f75268cd | 1905 | ax2asc(buf, &ax25->digipeat->calls[k]), |
1da177e4 LT |
1906 | ax25->digipeat->repeated[k]? "*":""); |
1907 | } | |
1908 | ||
1909 | seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d", | |
1910 | ax25->state, | |
1911 | ax25->vs, ax25->vr, ax25->va, | |
1912 | ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ, | |
1913 | ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ, | |
1914 | ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ, | |
1915 | ax25_display_timer(&ax25->idletimer) / (60 * HZ), | |
1916 | ax25->idle / (60 * HZ), | |
1917 | ax25->n2count, ax25->n2, | |
1918 | ax25->rtt / HZ, | |
1919 | ax25->window, | |
1920 | ax25->paclen); | |
1921 | ||
1922 | if (ax25->sk != NULL) { | |
1105b5d1 | 1923 | seq_printf(seq, " %d %d %lu\n", |
1da177e4 LT |
1924 | atomic_read(&ax25->sk->sk_wmem_alloc), |
1925 | atomic_read(&ax25->sk->sk_rmem_alloc), | |
1105b5d1 | 1926 | sock_i_ino(ax25->sk)); |
1da177e4 LT |
1927 | } else { |
1928 | seq_puts(seq, " * * *\n"); | |
1929 | } | |
1930 | return 0; | |
1931 | } | |
1932 | ||
56b3d975 | 1933 | static const struct seq_operations ax25_info_seqops = { |
1da177e4 LT |
1934 | .start = ax25_info_start, |
1935 | .next = ax25_info_next, | |
1936 | .stop = ax25_info_stop, | |
1937 | .show = ax25_info_show, | |
1938 | }; | |
1939 | ||
1940 | static int ax25_info_open(struct inode *inode, struct file *file) | |
1941 | { | |
1942 | return seq_open(file, &ax25_info_seqops); | |
1943 | } | |
1944 | ||
9a32144e | 1945 | static const struct file_operations ax25_info_fops = { |
1da177e4 LT |
1946 | .owner = THIS_MODULE, |
1947 | .open = ax25_info_open, | |
1948 | .read = seq_read, | |
1949 | .llseek = seq_lseek, | |
1950 | .release = seq_release, | |
1951 | }; | |
1952 | ||
1953 | #endif | |
1954 | ||
1955 | static struct net_proto_family ax25_family_ops = { | |
1956 | .family = PF_AX25, | |
1957 | .create = ax25_create, | |
1958 | .owner = THIS_MODULE, | |
1959 | }; | |
1960 | ||
90ddc4f0 | 1961 | static const struct proto_ops ax25_proto_ops = { |
4676356b RB |
1962 | .family = PF_AX25, |
1963 | .owner = THIS_MODULE, | |
1964 | .release = ax25_release, | |
1965 | .bind = ax25_bind, | |
1966 | .connect = ax25_connect, | |
1967 | .socketpair = sock_no_socketpair, | |
1968 | .accept = ax25_accept, | |
1969 | .getname = ax25_getname, | |
1970 | .poll = datagram_poll, | |
1971 | .ioctl = ax25_ioctl, | |
1972 | .listen = ax25_listen, | |
1973 | .shutdown = ax25_shutdown, | |
1974 | .setsockopt = ax25_setsockopt, | |
1975 | .getsockopt = ax25_getsockopt, | |
1976 | .sendmsg = ax25_sendmsg, | |
1977 | .recvmsg = ax25_recvmsg, | |
1978 | .mmap = sock_no_mmap, | |
1979 | .sendpage = sock_no_sendpage, | |
1da177e4 LT |
1980 | }; |
1981 | ||
1982 | /* | |
1983 | * Called by socket.c on kernel start up | |
1984 | */ | |
1985 | static struct packet_type ax25_packet_type = { | |
1986 | .type = __constant_htons(ETH_P_AX25), | |
1987 | .dev = NULL, /* All devices */ | |
1988 | .func = ax25_kiss_rcv, | |
1989 | }; | |
1990 | ||
1991 | static struct notifier_block ax25_dev_notifier = { | |
1992 | .notifier_call =ax25_device_event, | |
1993 | }; | |
1994 | ||
1da177e4 LT |
1995 | static int __init ax25_init(void) |
1996 | { | |
1997 | int rc = proto_register(&ax25_proto, 0); | |
1998 | ||
1999 | if (rc != 0) | |
2000 | goto out; | |
2001 | ||
2002 | sock_register(&ax25_family_ops); | |
2003 | dev_add_pack(&ax25_packet_type); | |
2004 | register_netdevice_notifier(&ax25_dev_notifier); | |
2005 | ax25_register_sysctl(); | |
2006 | ||
457c4cbc EB |
2007 | proc_net_fops_create(&init_net, "ax25_route", S_IRUGO, &ax25_route_fops); |
2008 | proc_net_fops_create(&init_net, "ax25", S_IRUGO, &ax25_info_fops); | |
2009 | proc_net_fops_create(&init_net, "ax25_calls", S_IRUGO, &ax25_uid_fops); | |
1da177e4 LT |
2010 | out: |
2011 | return rc; | |
2012 | } | |
2013 | module_init(ax25_init); | |
2014 | ||
2015 | ||
2016 | MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); | |
2017 | MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol"); | |
2018 | MODULE_LICENSE("GPL"); | |
2019 | MODULE_ALIAS_NETPROTO(PF_AX25); | |
2020 | ||
2021 | static void __exit ax25_exit(void) | |
2022 | { | |
457c4cbc EB |
2023 | proc_net_remove(&init_net, "ax25_route"); |
2024 | proc_net_remove(&init_net, "ax25"); | |
2025 | proc_net_remove(&init_net, "ax25_calls"); | |
1da177e4 LT |
2026 | ax25_rt_free(); |
2027 | ax25_uid_free(); | |
2028 | ax25_dev_free(); | |
2029 | ||
2030 | ax25_unregister_sysctl(); | |
2031 | unregister_netdevice_notifier(&ax25_dev_notifier); | |
2032 | ||
2033 | dev_remove_pack(&ax25_packet_type); | |
2034 | ||
2035 | sock_unregister(PF_AX25); | |
2036 | proto_unregister(&ax25_proto); | |
2037 | } | |
2038 | module_exit(ax25_exit); |