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Commit | Line | Data |
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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> | |
5a0e3ad6 | 28 | #include <linux/slab.h> |
1da177e4 LT |
29 | #include <net/ax25.h> |
30 | #include <linux/inet.h> | |
31 | #include <linux/netdevice.h> | |
32 | #include <linux/if_arp.h> | |
33 | #include <linux/skbuff.h> | |
34 | #include <net/sock.h> | |
35 | #include <asm/uaccess.h> | |
1da177e4 LT |
36 | #include <linux/fcntl.h> |
37 | #include <linux/termios.h> /* For TIOCINQ/OUTQ */ | |
38 | #include <linux/mm.h> | |
39 | #include <linux/interrupt.h> | |
40 | #include <linux/notifier.h> | |
41 | #include <linux/proc_fs.h> | |
42 | #include <linux/stat.h> | |
43 | #include <linux/netfilter.h> | |
44 | #include <linux/sysctl.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/spinlock.h> | |
457c4cbc | 47 | #include <net/net_namespace.h> |
c752f073 | 48 | #include <net/tcp_states.h> |
1da177e4 LT |
49 | #include <net/ip.h> |
50 | #include <net/arp.h> | |
51 | ||
52 | ||
53 | ||
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 | ||
33d1d2c5 DM |
320 | /* 9A4GL: hack to release unaccepted sockets */ |
321 | skb->sk->sk_state = TCP_LISTEN; | |
322 | ||
1da177e4 LT |
323 | ax25_start_heartbeat(sax25); |
324 | sax25->state = AX25_STATE_0; | |
325 | } | |
326 | ||
327 | kfree_skb(skb); | |
328 | } | |
329 | skb_queue_purge(&ax25->sk->sk_write_queue); | |
330 | } | |
331 | ||
332 | if (ax25->sk != NULL) { | |
c564039f | 333 | if (sk_has_allocations(ax25->sk)) { |
1da177e4 | 334 | /* Defer: outstanding buffers */ |
b24b8a24 PE |
335 | setup_timer(&ax25->dtimer, ax25_destroy_timer, |
336 | (unsigned long)ax25); | |
1da177e4 | 337 | ax25->dtimer.expires = jiffies + 2 * HZ; |
1da177e4 LT |
338 | add_timer(&ax25->dtimer); |
339 | } else { | |
340 | struct sock *sk=ax25->sk; | |
341 | ax25->sk=NULL; | |
342 | sock_put(sk); | |
343 | } | |
344 | } else { | |
345 | ax25_cb_put(ax25); | |
346 | } | |
347 | } | |
348 | ||
349 | /* | |
350 | * dl1bke 960311: set parameters for existing AX.25 connections, | |
351 | * includes a KILL command to abort any connection. | |
352 | * VERY useful for debugging ;-) | |
353 | */ | |
354 | static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg) | |
355 | { | |
356 | struct ax25_ctl_struct ax25_ctl; | |
357 | ax25_digi digi; | |
358 | ax25_dev *ax25_dev; | |
359 | ax25_cb *ax25; | |
360 | unsigned int k; | |
c0181d42 | 361 | int ret = 0; |
1da177e4 LT |
362 | |
363 | if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl))) | |
364 | return -EFAULT; | |
365 | ||
366 | if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL) | |
367 | return -ENODEV; | |
368 | ||
369 | if (ax25_ctl.digi_count > AX25_MAX_DIGIS) | |
370 | return -EINVAL; | |
371 | ||
43ab8502 | 372 | if (ax25_ctl.arg > ULONG_MAX / HZ && ax25_ctl.cmd != AX25_KILL) |
373 | return -EINVAL; | |
374 | ||
1da177e4 LT |
375 | digi.ndigi = ax25_ctl.digi_count; |
376 | for (k = 0; k < digi.ndigi; k++) | |
377 | digi.calls[k] = ax25_ctl.digi_addr[k]; | |
378 | ||
379 | if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL) | |
380 | return -ENOTCONN; | |
381 | ||
382 | switch (ax25_ctl.cmd) { | |
383 | case AX25_KILL: | |
384 | ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND); | |
385 | #ifdef CONFIG_AX25_DAMA_SLAVE | |
386 | if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE) | |
387 | ax25_dama_off(ax25); | |
388 | #endif | |
389 | ax25_disconnect(ax25, ENETRESET); | |
390 | break; | |
391 | ||
528930b9 YH |
392 | case AX25_WINDOW: |
393 | if (ax25->modulus == AX25_MODULUS) { | |
394 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7) | |
c0181d42 | 395 | goto einval_put; |
528930b9 YH |
396 | } else { |
397 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63) | |
c0181d42 | 398 | goto einval_put; |
528930b9 YH |
399 | } |
400 | ax25->window = ax25_ctl.arg; | |
401 | break; | |
402 | ||
403 | case AX25_T1: | |
be639ac6 | 404 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ) |
c0181d42 | 405 | goto einval_put; |
528930b9 YH |
406 | ax25->rtt = (ax25_ctl.arg * HZ) / 2; |
407 | ax25->t1 = ax25_ctl.arg * HZ; | |
408 | break; | |
409 | ||
410 | case AX25_T2: | |
be639ac6 | 411 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ) |
c0181d42 | 412 | goto einval_put; |
528930b9 YH |
413 | ax25->t2 = ax25_ctl.arg * HZ; |
414 | break; | |
415 | ||
416 | case AX25_N2: | |
417 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31) | |
c0181d42 | 418 | goto einval_put; |
528930b9 YH |
419 | ax25->n2count = 0; |
420 | ax25->n2 = ax25_ctl.arg; | |
421 | break; | |
422 | ||
423 | case AX25_T3: | |
be639ac6 RB |
424 | if (ax25_ctl.arg > ULONG_MAX / HZ) |
425 | goto einval_put; | |
528930b9 YH |
426 | ax25->t3 = ax25_ctl.arg * HZ; |
427 | break; | |
428 | ||
429 | case AX25_IDLE: | |
be639ac6 RB |
430 | if (ax25_ctl.arg > ULONG_MAX / (60 * HZ)) |
431 | goto einval_put; | |
432 | ||
528930b9 YH |
433 | ax25->idle = ax25_ctl.arg * 60 * HZ; |
434 | break; | |
435 | ||
436 | case AX25_PACLEN: | |
437 | if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535) | |
c0181d42 | 438 | goto einval_put; |
528930b9 YH |
439 | ax25->paclen = ax25_ctl.arg; |
440 | break; | |
441 | ||
442 | default: | |
c0181d42 | 443 | goto einval_put; |
1da177e4 LT |
444 | } |
445 | ||
c0181d42 JP |
446 | out_put: |
447 | ax25_cb_put(ax25); | |
448 | return ret; | |
449 | ||
450 | einval_put: | |
451 | ret = -EINVAL; | |
452 | goto out_put; | |
1da177e4 LT |
453 | } |
454 | ||
e1fdb5b3 RB |
455 | static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev) |
456 | { | |
457 | ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2; | |
458 | ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]); | |
459 | ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]); | |
460 | ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]); | |
461 | ax25->n2 = ax25_dev->values[AX25_VALUES_N2]; | |
462 | ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN]; | |
463 | ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]); | |
464 | ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF]; | |
465 | ||
466 | if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) { | |
467 | ax25->modulus = AX25_EMODULUS; | |
468 | ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW]; | |
469 | } else { | |
470 | ax25->modulus = AX25_MODULUS; | |
471 | ax25->window = ax25_dev->values[AX25_VALUES_WINDOW]; | |
472 | } | |
473 | } | |
474 | ||
1da177e4 LT |
475 | /* |
476 | * Fill in a created AX.25 created control block with the default | |
477 | * values for a particular device. | |
478 | */ | |
479 | void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev) | |
480 | { | |
481 | ax25->ax25_dev = ax25_dev; | |
482 | ||
483 | if (ax25->ax25_dev != NULL) { | |
e1fdb5b3 RB |
484 | ax25_fillin_cb_from_dev(ax25, ax25_dev); |
485 | return; | |
486 | } | |
487 | ||
488 | /* | |
489 | * No device, use kernel / AX.25 spec default values | |
490 | */ | |
491 | ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2; | |
492 | ax25->t1 = msecs_to_jiffies(AX25_DEF_T1); | |
493 | ax25->t2 = msecs_to_jiffies(AX25_DEF_T2); | |
494 | ax25->t3 = msecs_to_jiffies(AX25_DEF_T3); | |
495 | ax25->n2 = AX25_DEF_N2; | |
496 | ax25->paclen = AX25_DEF_PACLEN; | |
497 | ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE); | |
498 | ax25->backoff = AX25_DEF_BACKOFF; | |
499 | ||
500 | if (AX25_DEF_AXDEFMODE) { | |
501 | ax25->modulus = AX25_EMODULUS; | |
502 | ax25->window = AX25_DEF_EWINDOW; | |
1da177e4 | 503 | } else { |
e1fdb5b3 RB |
504 | ax25->modulus = AX25_MODULUS; |
505 | ax25->window = AX25_DEF_WINDOW; | |
1da177e4 LT |
506 | } |
507 | } | |
508 | ||
509 | /* | |
510 | * Create an empty AX.25 control block. | |
511 | */ | |
512 | ax25_cb *ax25_create_cb(void) | |
513 | { | |
514 | ax25_cb *ax25; | |
515 | ||
1b30dd35 | 516 | if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL) |
1da177e4 LT |
517 | return NULL; |
518 | ||
1da177e4 LT |
519 | atomic_set(&ax25->refcount, 1); |
520 | ||
521 | skb_queue_head_init(&ax25->write_queue); | |
522 | skb_queue_head_init(&ax25->frag_queue); | |
523 | skb_queue_head_init(&ax25->ack_queue); | |
524 | skb_queue_head_init(&ax25->reseq_queue); | |
525 | ||
21fab4a8 | 526 | ax25_setup_timers(ax25); |
1da177e4 LT |
527 | |
528 | ax25_fillin_cb(ax25, NULL); | |
529 | ||
530 | ax25->state = AX25_STATE_0; | |
531 | ||
532 | return ax25; | |
533 | } | |
534 | ||
535 | /* | |
536 | * Handling for system calls applied via the various interfaces to an | |
537 | * AX25 socket object | |
538 | */ | |
539 | ||
540 | static int ax25_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 541 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
542 | { |
543 | struct sock *sk = sock->sk; | |
544 | ax25_cb *ax25; | |
545 | struct net_device *dev; | |
546 | char devname[IFNAMSIZ]; | |
ba1cffe0 XW |
547 | unsigned long opt; |
548 | int res = 0; | |
1da177e4 LT |
549 | |
550 | if (level != SOL_AX25) | |
551 | return -ENOPROTOOPT; | |
552 | ||
ba1cffe0 | 553 | if (optlen < sizeof(unsigned int)) |
1da177e4 LT |
554 | return -EINVAL; |
555 | ||
ba1cffe0 | 556 | if (get_user(opt, (unsigned int __user *)optval)) |
1da177e4 LT |
557 | return -EFAULT; |
558 | ||
559 | lock_sock(sk); | |
560 | ax25 = ax25_sk(sk); | |
561 | ||
562 | switch (optname) { | |
563 | case AX25_WINDOW: | |
564 | if (ax25->modulus == AX25_MODULUS) { | |
565 | if (opt < 1 || opt > 7) { | |
566 | res = -EINVAL; | |
567 | break; | |
568 | } | |
569 | } else { | |
570 | if (opt < 1 || opt > 63) { | |
571 | res = -EINVAL; | |
572 | break; | |
573 | } | |
574 | } | |
575 | ax25->window = opt; | |
576 | break; | |
577 | ||
578 | case AX25_T1: | |
be639ac6 | 579 | if (opt < 1 || opt > ULONG_MAX / HZ) { |
1da177e4 LT |
580 | res = -EINVAL; |
581 | break; | |
582 | } | |
f16f3026 | 583 | ax25->rtt = (opt * HZ) >> 1; |
1da177e4 LT |
584 | ax25->t1 = opt * HZ; |
585 | break; | |
586 | ||
587 | case AX25_T2: | |
be639ac6 | 588 | if (opt < 1 || opt > ULONG_MAX / HZ) { |
1da177e4 LT |
589 | res = -EINVAL; |
590 | break; | |
591 | } | |
592 | ax25->t2 = opt * HZ; | |
593 | break; | |
594 | ||
595 | case AX25_N2: | |
596 | if (opt < 1 || opt > 31) { | |
597 | res = -EINVAL; | |
598 | break; | |
599 | } | |
600 | ax25->n2 = opt; | |
601 | break; | |
602 | ||
603 | case AX25_T3: | |
be639ac6 | 604 | if (opt < 1 || opt > ULONG_MAX / HZ) { |
1da177e4 LT |
605 | res = -EINVAL; |
606 | break; | |
607 | } | |
608 | ax25->t3 = opt * HZ; | |
609 | break; | |
610 | ||
611 | case AX25_IDLE: | |
ba1cffe0 | 612 | if (opt > ULONG_MAX / (60 * HZ)) { |
1da177e4 LT |
613 | res = -EINVAL; |
614 | break; | |
615 | } | |
616 | ax25->idle = opt * 60 * HZ; | |
617 | break; | |
618 | ||
619 | case AX25_BACKOFF: | |
ba1cffe0 | 620 | if (opt > 2) { |
1da177e4 LT |
621 | res = -EINVAL; |
622 | break; | |
623 | } | |
624 | ax25->backoff = opt; | |
625 | break; | |
626 | ||
627 | case AX25_EXTSEQ: | |
628 | ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS; | |
629 | break; | |
630 | ||
631 | case AX25_PIDINCL: | |
632 | ax25->pidincl = opt ? 1 : 0; | |
633 | break; | |
634 | ||
635 | case AX25_IAMDIGI: | |
636 | ax25->iamdigi = opt ? 1 : 0; | |
637 | break; | |
638 | ||
639 | case AX25_PACLEN: | |
640 | if (opt < 16 || opt > 65535) { | |
641 | res = -EINVAL; | |
642 | break; | |
643 | } | |
644 | ax25->paclen = opt; | |
645 | break; | |
646 | ||
647 | case SO_BINDTODEVICE: | |
648 | if (optlen > IFNAMSIZ) | |
2f72291d | 649 | optlen = IFNAMSIZ; |
1da177e4 | 650 | |
2f72291d RB |
651 | if (copy_from_user(devname, optval, optlen)) { |
652 | res = -EFAULT; | |
1da177e4 LT |
653 | break; |
654 | } | |
655 | ||
656 | if (sk->sk_type == SOCK_SEQPACKET && | |
657 | (sock->state != SS_UNCONNECTED || | |
658 | sk->sk_state == TCP_LISTEN)) { | |
659 | res = -EADDRNOTAVAIL; | |
2f72291d RB |
660 | break; |
661 | } | |
662 | ||
663 | dev = dev_get_by_name(&init_net, devname); | |
664 | if (!dev) { | |
665 | res = -ENODEV; | |
1da177e4 LT |
666 | break; |
667 | } | |
668 | ||
669 | ax25->ax25_dev = ax25_dev_ax25dev(dev); | |
670 | ax25_fillin_cb(ax25, ax25->ax25_dev); | |
2f72291d | 671 | dev_put(dev); |
1da177e4 LT |
672 | break; |
673 | ||
674 | default: | |
675 | res = -ENOPROTOOPT; | |
676 | } | |
677 | release_sock(sk); | |
678 | ||
679 | return res; | |
680 | } | |
681 | ||
682 | static int ax25_getsockopt(struct socket *sock, int level, int optname, | |
683 | char __user *optval, int __user *optlen) | |
684 | { | |
685 | struct sock *sk = sock->sk; | |
686 | ax25_cb *ax25; | |
687 | struct ax25_dev *ax25_dev; | |
688 | char devname[IFNAMSIZ]; | |
689 | void *valptr; | |
690 | int val = 0; | |
691 | int maxlen, length; | |
692 | ||
693 | if (level != SOL_AX25) | |
694 | return -ENOPROTOOPT; | |
695 | ||
696 | if (get_user(maxlen, optlen)) | |
697 | return -EFAULT; | |
698 | ||
699 | if (maxlen < 1) | |
700 | return -EFAULT; | |
701 | ||
702 | valptr = (void *) &val; | |
703 | length = min_t(unsigned int, maxlen, sizeof(int)); | |
704 | ||
705 | lock_sock(sk); | |
706 | ax25 = ax25_sk(sk); | |
707 | ||
708 | switch (optname) { | |
709 | case AX25_WINDOW: | |
710 | val = ax25->window; | |
711 | break; | |
712 | ||
713 | case AX25_T1: | |
714 | val = ax25->t1 / HZ; | |
715 | break; | |
716 | ||
717 | case AX25_T2: | |
718 | val = ax25->t2 / HZ; | |
719 | break; | |
720 | ||
721 | case AX25_N2: | |
722 | val = ax25->n2; | |
723 | break; | |
724 | ||
725 | case AX25_T3: | |
726 | val = ax25->t3 / HZ; | |
727 | break; | |
728 | ||
729 | case AX25_IDLE: | |
730 | val = ax25->idle / (60 * HZ); | |
731 | break; | |
732 | ||
733 | case AX25_BACKOFF: | |
734 | val = ax25->backoff; | |
735 | break; | |
736 | ||
737 | case AX25_EXTSEQ: | |
738 | val = (ax25->modulus == AX25_EMODULUS); | |
739 | break; | |
740 | ||
741 | case AX25_PIDINCL: | |
742 | val = ax25->pidincl; | |
743 | break; | |
744 | ||
745 | case AX25_IAMDIGI: | |
746 | val = ax25->iamdigi; | |
747 | break; | |
748 | ||
749 | case AX25_PACLEN: | |
750 | val = ax25->paclen; | |
751 | break; | |
752 | ||
753 | case SO_BINDTODEVICE: | |
754 | ax25_dev = ax25->ax25_dev; | |
755 | ||
756 | if (ax25_dev != NULL && ax25_dev->dev != NULL) { | |
757 | strlcpy(devname, ax25_dev->dev->name, sizeof(devname)); | |
758 | length = strlen(devname) + 1; | |
759 | } else { | |
760 | *devname = '\0'; | |
761 | length = 1; | |
762 | } | |
763 | ||
764 | valptr = (void *) devname; | |
765 | break; | |
766 | ||
767 | default: | |
768 | release_sock(sk); | |
769 | return -ENOPROTOOPT; | |
770 | } | |
771 | release_sock(sk); | |
772 | ||
773 | if (put_user(length, optlen)) | |
774 | return -EFAULT; | |
775 | ||
776 | return copy_to_user(optval, valptr, length) ? -EFAULT : 0; | |
777 | } | |
778 | ||
779 | static int ax25_listen(struct socket *sock, int backlog) | |
780 | { | |
781 | struct sock *sk = sock->sk; | |
782 | int res = 0; | |
783 | ||
784 | lock_sock(sk); | |
785 | if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) { | |
786 | sk->sk_max_ack_backlog = backlog; | |
787 | sk->sk_state = TCP_LISTEN; | |
788 | goto out; | |
789 | } | |
790 | res = -EOPNOTSUPP; | |
791 | ||
792 | out: | |
793 | release_sock(sk); | |
794 | ||
795 | return res; | |
796 | } | |
797 | ||
798 | /* | |
799 | * XXX: when creating ax25_sock we should update the .obj_size setting | |
800 | * below. | |
801 | */ | |
802 | static struct proto ax25_proto = { | |
803 | .name = "AX25", | |
804 | .owner = THIS_MODULE, | |
805 | .obj_size = sizeof(struct sock), | |
806 | }; | |
807 | ||
3f378b68 EP |
808 | static int ax25_create(struct net *net, struct socket *sock, int protocol, |
809 | int kern) | |
1da177e4 LT |
810 | { |
811 | struct sock *sk; | |
812 | ax25_cb *ax25; | |
813 | ||
09ad9bc7 | 814 | if (!net_eq(net, &init_net)) |
1b8d7ae4 EB |
815 | return -EAFNOSUPPORT; |
816 | ||
1da177e4 LT |
817 | switch (sock->type) { |
818 | case SOCK_DGRAM: | |
819 | if (protocol == 0 || protocol == PF_AX25) | |
820 | protocol = AX25_P_TEXT; | |
821 | break; | |
822 | ||
823 | case SOCK_SEQPACKET: | |
824 | switch (protocol) { | |
825 | case 0: | |
826 | case PF_AX25: /* For CLX */ | |
827 | protocol = AX25_P_TEXT; | |
828 | break; | |
829 | case AX25_P_SEGMENT: | |
830 | #ifdef CONFIG_INET | |
831 | case AX25_P_ARP: | |
832 | case AX25_P_IP: | |
833 | #endif | |
834 | #ifdef CONFIG_NETROM | |
835 | case AX25_P_NETROM: | |
836 | #endif | |
837 | #ifdef CONFIG_ROSE | |
838 | case AX25_P_ROSE: | |
839 | #endif | |
840 | return -ESOCKTNOSUPPORT; | |
841 | #ifdef CONFIG_NETROM_MODULE | |
842 | case AX25_P_NETROM: | |
843 | if (ax25_protocol_is_registered(AX25_P_NETROM)) | |
844 | return -ESOCKTNOSUPPORT; | |
ef764a13 | 845 | break; |
1da177e4 LT |
846 | #endif |
847 | #ifdef CONFIG_ROSE_MODULE | |
848 | case AX25_P_ROSE: | |
849 | if (ax25_protocol_is_registered(AX25_P_ROSE)) | |
850 | return -ESOCKTNOSUPPORT; | |
851 | #endif | |
852 | default: | |
853 | break; | |
854 | } | |
855 | break; | |
856 | ||
857 | case SOCK_RAW: | |
858 | break; | |
859 | default: | |
860 | return -ESOCKTNOSUPPORT; | |
861 | } | |
862 | ||
6257ff21 PE |
863 | sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto); |
864 | if (sk == NULL) | |
1da177e4 LT |
865 | return -ENOMEM; |
866 | ||
867 | ax25 = sk->sk_protinfo = ax25_create_cb(); | |
868 | if (!ax25) { | |
869 | sk_free(sk); | |
870 | return -ENOMEM; | |
871 | } | |
872 | ||
873 | sock_init_data(sock, sk); | |
874 | ||
875 | sk->sk_destruct = ax25_free_sock; | |
876 | sock->ops = &ax25_proto_ops; | |
877 | sk->sk_protocol = protocol; | |
878 | ||
879 | ax25->sk = sk; | |
880 | ||
881 | return 0; | |
882 | } | |
883 | ||
884 | struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev) | |
885 | { | |
886 | struct sock *sk; | |
887 | ax25_cb *ax25, *oax25; | |
888 | ||
3b1e0a65 | 889 | sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot); |
6257ff21 | 890 | if (sk == NULL) |
1da177e4 LT |
891 | return NULL; |
892 | ||
893 | if ((ax25 = ax25_create_cb()) == NULL) { | |
894 | sk_free(sk); | |
895 | return NULL; | |
896 | } | |
897 | ||
898 | switch (osk->sk_type) { | |
899 | case SOCK_DGRAM: | |
900 | break; | |
901 | case SOCK_SEQPACKET: | |
902 | break; | |
903 | default: | |
904 | sk_free(sk); | |
905 | ax25_cb_put(ax25); | |
906 | return NULL; | |
907 | } | |
908 | ||
909 | sock_init_data(NULL, sk); | |
910 | ||
1da177e4 | 911 | sk->sk_type = osk->sk_type; |
1da177e4 LT |
912 | sk->sk_priority = osk->sk_priority; |
913 | sk->sk_protocol = osk->sk_protocol; | |
914 | sk->sk_rcvbuf = osk->sk_rcvbuf; | |
915 | sk->sk_sndbuf = osk->sk_sndbuf; | |
916 | sk->sk_state = TCP_ESTABLISHED; | |
53b924b3 | 917 | sock_copy_flags(sk, osk); |
1da177e4 LT |
918 | |
919 | oax25 = ax25_sk(osk); | |
920 | ||
921 | ax25->modulus = oax25->modulus; | |
922 | ax25->backoff = oax25->backoff; | |
923 | ax25->pidincl = oax25->pidincl; | |
924 | ax25->iamdigi = oax25->iamdigi; | |
925 | ax25->rtt = oax25->rtt; | |
926 | ax25->t1 = oax25->t1; | |
927 | ax25->t2 = oax25->t2; | |
928 | ax25->t3 = oax25->t3; | |
929 | ax25->n2 = oax25->n2; | |
930 | ax25->idle = oax25->idle; | |
931 | ax25->paclen = oax25->paclen; | |
932 | ax25->window = oax25->window; | |
933 | ||
934 | ax25->ax25_dev = ax25_dev; | |
935 | ax25->source_addr = oax25->source_addr; | |
936 | ||
937 | if (oax25->digipeat != NULL) { | |
0459d70a ACM |
938 | ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi), |
939 | GFP_ATOMIC); | |
940 | if (ax25->digipeat == NULL) { | |
1da177e4 LT |
941 | sk_free(sk); |
942 | ax25_cb_put(ax25); | |
943 | return NULL; | |
944 | } | |
1da177e4 LT |
945 | } |
946 | ||
947 | sk->sk_protinfo = ax25; | |
8c185ab6 | 948 | sk->sk_destruct = ax25_free_sock; |
1da177e4 LT |
949 | ax25->sk = sk; |
950 | ||
951 | return sk; | |
952 | } | |
953 | ||
954 | static int ax25_release(struct socket *sock) | |
955 | { | |
956 | struct sock *sk = sock->sk; | |
957 | ax25_cb *ax25; | |
958 | ||
959 | if (sk == NULL) | |
960 | return 0; | |
961 | ||
962 | sock_hold(sk); | |
963 | sock_orphan(sk); | |
964 | lock_sock(sk); | |
965 | ax25 = ax25_sk(sk); | |
966 | ||
967 | if (sk->sk_type == SOCK_SEQPACKET) { | |
968 | switch (ax25->state) { | |
969 | case AX25_STATE_0: | |
970 | release_sock(sk); | |
971 | ax25_disconnect(ax25, 0); | |
972 | lock_sock(sk); | |
973 | ax25_destroy_socket(ax25); | |
974 | break; | |
975 | ||
976 | case AX25_STATE_1: | |
977 | case AX25_STATE_2: | |
978 | ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND); | |
979 | release_sock(sk); | |
980 | ax25_disconnect(ax25, 0); | |
981 | lock_sock(sk); | |
982 | ax25_destroy_socket(ax25); | |
983 | break; | |
984 | ||
985 | case AX25_STATE_3: | |
986 | case AX25_STATE_4: | |
987 | ax25_clear_queues(ax25); | |
988 | ax25->n2count = 0; | |
989 | ||
990 | switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) { | |
991 | case AX25_PROTO_STD_SIMPLEX: | |
992 | case AX25_PROTO_STD_DUPLEX: | |
993 | ax25_send_control(ax25, | |
994 | AX25_DISC, | |
995 | AX25_POLLON, | |
996 | AX25_COMMAND); | |
997 | ax25_stop_t2timer(ax25); | |
998 | ax25_stop_t3timer(ax25); | |
999 | ax25_stop_idletimer(ax25); | |
1000 | break; | |
1001 | #ifdef CONFIG_AX25_DAMA_SLAVE | |
1002 | case AX25_PROTO_DAMA_SLAVE: | |
1003 | ax25_stop_t3timer(ax25); | |
1004 | ax25_stop_idletimer(ax25); | |
1005 | break; | |
1006 | #endif | |
1007 | } | |
1008 | ax25_calculate_t1(ax25); | |
1009 | ax25_start_t1timer(ax25); | |
1010 | ax25->state = AX25_STATE_2; | |
1011 | sk->sk_state = TCP_CLOSE; | |
1012 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
1013 | sk->sk_state_change(sk); | |
1014 | sock_set_flag(sk, SOCK_DESTROY); | |
1015 | break; | |
1016 | ||
1017 | default: | |
1018 | break; | |
1019 | } | |
1020 | } else { | |
1021 | sk->sk_state = TCP_CLOSE; | |
1022 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
1023 | sk->sk_state_change(sk); | |
1024 | ax25_destroy_socket(ax25); | |
1025 | } | |
1026 | ||
1027 | sock->sk = NULL; | |
1028 | release_sock(sk); | |
1029 | sock_put(sk); | |
1030 | ||
1031 | return 0; | |
1032 | } | |
1033 | ||
1034 | /* | |
1035 | * We support a funny extension here so you can (as root) give any callsign | |
1036 | * digipeated via a local address as source. This hack is obsolete now | |
1037 | * that we've implemented support for SO_BINDTODEVICE. It is however small | |
1038 | * and trivially backward compatible. | |
1039 | */ | |
1040 | static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
1041 | { | |
1042 | struct sock *sk = sock->sk; | |
1043 | struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr; | |
1044 | ax25_dev *ax25_dev = NULL; | |
01d7dd0e RB |
1045 | ax25_uid_assoc *user; |
1046 | ax25_address call; | |
1da177e4 LT |
1047 | ax25_cb *ax25; |
1048 | int err = 0; | |
1049 | ||
1050 | if (addr_len != sizeof(struct sockaddr_ax25) && | |
1987e7b4 | 1051 | addr_len != sizeof(struct full_sockaddr_ax25)) |
1052 | /* support for old structure may go away some time | |
1053 | * ax25_bind(): uses old (6 digipeater) socket structure. | |
1054 | */ | |
1da177e4 | 1055 | if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || |
1987e7b4 | 1056 | (addr_len > sizeof(struct full_sockaddr_ax25))) |
1da177e4 | 1057 | return -EINVAL; |
1da177e4 LT |
1058 | |
1059 | if (addr->fsa_ax25.sax25_family != AF_AX25) | |
1060 | return -EINVAL; | |
1061 | ||
73400407 | 1062 | user = ax25_findbyuid(current_euid()); |
01d7dd0e RB |
1063 | if (user) { |
1064 | call = user->call; | |
1065 | ax25_uid_put(user); | |
1066 | } else { | |
1067 | if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) | |
1068 | return -EACCES; | |
1069 | ||
1070 | call = addr->fsa_ax25.sax25_call; | |
1da177e4 LT |
1071 | } |
1072 | ||
1073 | lock_sock(sk); | |
1074 | ||
1075 | ax25 = ax25_sk(sk); | |
1076 | if (!sock_flag(sk, SOCK_ZAPPED)) { | |
1077 | err = -EINVAL; | |
1078 | goto out; | |
1079 | } | |
1080 | ||
01d7dd0e | 1081 | ax25->source_addr = call; |
1da177e4 LT |
1082 | |
1083 | /* | |
1084 | * User already set interface with SO_BINDTODEVICE | |
1085 | */ | |
1086 | if (ax25->ax25_dev != NULL) | |
1087 | goto done; | |
1088 | ||
1089 | if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) { | |
1090 | if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 && | |
1091 | (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) { | |
1092 | err = -EADDRNOTAVAIL; | |
1093 | goto out; | |
1094 | } | |
1095 | } else { | |
1096 | if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) { | |
1097 | err = -EADDRNOTAVAIL; | |
1098 | goto out; | |
1099 | } | |
1100 | } | |
1101 | ||
1102 | if (ax25_dev != NULL) | |
1103 | ax25_fillin_cb(ax25, ax25_dev); | |
1104 | ||
1105 | done: | |
1106 | ax25_cb_add(ax25); | |
1107 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1108 | ||
1109 | out: | |
1110 | release_sock(sk); | |
1111 | ||
49339cca | 1112 | return err; |
1da177e4 LT |
1113 | } |
1114 | ||
1115 | /* | |
1116 | * FIXME: nonblock behaviour looks like it may have a bug. | |
1117 | */ | |
c9266b99 RB |
1118 | static int __must_check ax25_connect(struct socket *sock, |
1119 | struct sockaddr *uaddr, int addr_len, int flags) | |
1da177e4 LT |
1120 | { |
1121 | struct sock *sk = sock->sk; | |
1122 | ax25_cb *ax25 = ax25_sk(sk), *ax25t; | |
1123 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr; | |
1124 | ax25_digi *digi = NULL; | |
1125 | int ct = 0, err = 0; | |
1126 | ||
1127 | /* | |
1128 | * some sanity checks. code further down depends on this | |
1129 | */ | |
1130 | ||
27d1cba2 | 1131 | if (addr_len == sizeof(struct sockaddr_ax25)) |
1132 | /* support for this will go away in early 2.5.x | |
1133 | * ax25_connect(): uses obsolete socket structure | |
1134 | */ | |
1135 | ; | |
1136 | else if (addr_len != sizeof(struct full_sockaddr_ax25)) | |
1137 | /* support for old structure may go away some time | |
1138 | * ax25_connect(): uses old (6 digipeater) socket structure. | |
1139 | */ | |
1da177e4 | 1140 | if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || |
27d1cba2 | 1141 | (addr_len > sizeof(struct full_sockaddr_ax25))) |
1da177e4 | 1142 | return -EINVAL; |
1da177e4 | 1143 | |
1da177e4 LT |
1144 | |
1145 | if (fsa->fsa_ax25.sax25_family != AF_AX25) | |
1146 | return -EINVAL; | |
1147 | ||
1148 | lock_sock(sk); | |
1149 | ||
1150 | /* deal with restarts */ | |
1151 | if (sock->state == SS_CONNECTING) { | |
1152 | switch (sk->sk_state) { | |
1153 | case TCP_SYN_SENT: /* still trying */ | |
1154 | err = -EINPROGRESS; | |
75606dc6 | 1155 | goto out_release; |
1da177e4 LT |
1156 | |
1157 | case TCP_ESTABLISHED: /* connection established */ | |
1158 | sock->state = SS_CONNECTED; | |
75606dc6 | 1159 | goto out_release; |
1da177e4 LT |
1160 | |
1161 | case TCP_CLOSE: /* connection refused */ | |
1162 | sock->state = SS_UNCONNECTED; | |
1163 | err = -ECONNREFUSED; | |
75606dc6 | 1164 | goto out_release; |
1da177e4 LT |
1165 | } |
1166 | } | |
1167 | ||
1168 | if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) { | |
1169 | err = -EISCONN; /* No reconnect on a seqpacket socket */ | |
75606dc6 | 1170 | goto out_release; |
1da177e4 LT |
1171 | } |
1172 | ||
1173 | sk->sk_state = TCP_CLOSE; | |
1174 | sock->state = SS_UNCONNECTED; | |
1175 | ||
a51482bd JJ |
1176 | kfree(ax25->digipeat); |
1177 | ax25->digipeat = NULL; | |
1da177e4 LT |
1178 | |
1179 | /* | |
1180 | * Handle digi-peaters to be used. | |
1181 | */ | |
1182 | if (addr_len > sizeof(struct sockaddr_ax25) && | |
1183 | fsa->fsa_ax25.sax25_ndigis != 0) { | |
1184 | /* Valid number of digipeaters ? */ | |
1185 | if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) { | |
1186 | err = -EINVAL; | |
75606dc6 | 1187 | goto out_release; |
1da177e4 LT |
1188 | } |
1189 | ||
1190 | if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) { | |
1191 | err = -ENOBUFS; | |
75606dc6 | 1192 | goto out_release; |
1da177e4 LT |
1193 | } |
1194 | ||
1195 | digi->ndigi = fsa->fsa_ax25.sax25_ndigis; | |
1196 | digi->lastrepeat = -1; | |
1197 | ||
1198 | while (ct < fsa->fsa_ax25.sax25_ndigis) { | |
1199 | if ((fsa->fsa_digipeater[ct].ax25_call[6] & | |
1200 | AX25_HBIT) && ax25->iamdigi) { | |
1201 | digi->repeated[ct] = 1; | |
1202 | digi->lastrepeat = ct; | |
1203 | } else { | |
1204 | digi->repeated[ct] = 0; | |
1205 | } | |
1206 | digi->calls[ct] = fsa->fsa_digipeater[ct]; | |
1207 | ct++; | |
1208 | } | |
1209 | } | |
1210 | ||
1211 | /* | |
1212 | * Must bind first - autobinding in this may or may not work. If | |
1213 | * the socket is already bound, check to see if the device has | |
1214 | * been filled in, error if it hasn't. | |
1215 | */ | |
1216 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
1217 | /* check if we can remove this feature. It is broken. */ | |
1218 | printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n", | |
1219 | current->comm); | |
1220 | if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) { | |
1221 | kfree(digi); | |
75606dc6 | 1222 | goto out_release; |
1da177e4 LT |
1223 | } |
1224 | ||
1225 | ax25_fillin_cb(ax25, ax25->ax25_dev); | |
1226 | ax25_cb_add(ax25); | |
1227 | } else { | |
1228 | if (ax25->ax25_dev == NULL) { | |
1229 | kfree(digi); | |
1230 | err = -EHOSTUNREACH; | |
75606dc6 | 1231 | goto out_release; |
1da177e4 LT |
1232 | } |
1233 | } | |
1234 | ||
1235 | if (sk->sk_type == SOCK_SEQPACKET && | |
1236 | (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi, | |
528930b9 | 1237 | ax25->ax25_dev->dev))) { |
1da177e4 LT |
1238 | kfree(digi); |
1239 | err = -EADDRINUSE; /* Already such a connection */ | |
1240 | ax25_cb_put(ax25t); | |
75606dc6 | 1241 | goto out_release; |
1da177e4 LT |
1242 | } |
1243 | ||
1244 | ax25->dest_addr = fsa->fsa_ax25.sax25_call; | |
1245 | ax25->digipeat = digi; | |
1246 | ||
1247 | /* First the easy one */ | |
1248 | if (sk->sk_type != SOCK_SEQPACKET) { | |
1249 | sock->state = SS_CONNECTED; | |
1250 | sk->sk_state = TCP_ESTABLISHED; | |
75606dc6 | 1251 | goto out_release; |
1da177e4 LT |
1252 | } |
1253 | ||
1254 | /* Move to connecting socket, ax.25 lapb WAIT_UA.. */ | |
1255 | sock->state = SS_CONNECTING; | |
1256 | sk->sk_state = TCP_SYN_SENT; | |
1257 | ||
1258 | switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) { | |
1259 | case AX25_PROTO_STD_SIMPLEX: | |
1260 | case AX25_PROTO_STD_DUPLEX: | |
1261 | ax25_std_establish_data_link(ax25); | |
1262 | break; | |
1263 | ||
1264 | #ifdef CONFIG_AX25_DAMA_SLAVE | |
1265 | case AX25_PROTO_DAMA_SLAVE: | |
1266 | ax25->modulus = AX25_MODULUS; | |
1267 | ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW]; | |
1268 | if (ax25->ax25_dev->dama.slave) | |
1269 | ax25_ds_establish_data_link(ax25); | |
1270 | else | |
1271 | ax25_std_establish_data_link(ax25); | |
1272 | break; | |
1273 | #endif | |
1274 | } | |
1275 | ||
1276 | ax25->state = AX25_STATE_1; | |
1277 | ||
1278 | ax25_start_heartbeat(ax25); | |
1279 | ||
1280 | /* Now the loop */ | |
1281 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { | |
1282 | err = -EINPROGRESS; | |
75606dc6 | 1283 | goto out_release; |
1da177e4 LT |
1284 | } |
1285 | ||
1286 | if (sk->sk_state == TCP_SYN_SENT) { | |
75606dc6 | 1287 | DEFINE_WAIT(wait); |
1da177e4 | 1288 | |
1da177e4 | 1289 | for (;;) { |
aa395145 | 1290 | prepare_to_wait(sk_sleep(sk), &wait, |
bd3b071b | 1291 | TASK_INTERRUPTIBLE); |
1da177e4 LT |
1292 | if (sk->sk_state != TCP_SYN_SENT) |
1293 | break; | |
75606dc6 RB |
1294 | if (!signal_pending(current)) { |
1295 | release_sock(sk); | |
1da177e4 LT |
1296 | schedule(); |
1297 | lock_sock(sk); | |
1298 | continue; | |
1299 | } | |
75606dc6 RB |
1300 | err = -ERESTARTSYS; |
1301 | break; | |
1da177e4 | 1302 | } |
aa395145 | 1303 | finish_wait(sk_sleep(sk), &wait); |
75606dc6 RB |
1304 | |
1305 | if (err) | |
1306 | goto out_release; | |
1da177e4 LT |
1307 | } |
1308 | ||
1309 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1310 | /* Not in ABM, not in WAIT_UA -> failed */ | |
1311 | sock->state = SS_UNCONNECTED; | |
1312 | err = sock_error(sk); /* Always set at this point */ | |
75606dc6 | 1313 | goto out_release; |
1da177e4 LT |
1314 | } |
1315 | ||
1316 | sock->state = SS_CONNECTED; | |
1317 | ||
75606dc6 RB |
1318 | err = 0; |
1319 | out_release: | |
1da177e4 LT |
1320 | release_sock(sk); |
1321 | ||
1322 | return err; | |
1323 | } | |
1324 | ||
1da177e4 LT |
1325 | static int ax25_accept(struct socket *sock, struct socket *newsock, int flags) |
1326 | { | |
1da177e4 LT |
1327 | struct sk_buff *skb; |
1328 | struct sock *newsk; | |
75606dc6 | 1329 | DEFINE_WAIT(wait); |
1da177e4 LT |
1330 | struct sock *sk; |
1331 | int err = 0; | |
1332 | ||
1333 | if (sock->state != SS_UNCONNECTED) | |
1334 | return -EINVAL; | |
1335 | ||
1336 | if ((sk = sock->sk) == NULL) | |
1337 | return -EINVAL; | |
1338 | ||
1339 | lock_sock(sk); | |
1340 | if (sk->sk_type != SOCK_SEQPACKET) { | |
1341 | err = -EOPNOTSUPP; | |
1342 | goto out; | |
1343 | } | |
1344 | ||
1345 | if (sk->sk_state != TCP_LISTEN) { | |
1346 | err = -EINVAL; | |
1347 | goto out; | |
1348 | } | |
1349 | ||
1350 | /* | |
1351 | * The read queue this time is holding sockets ready to use | |
1352 | * hooked into the SABM we saved | |
1353 | */ | |
1da177e4 | 1354 | for (;;) { |
aa395145 | 1355 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
1356 | skb = skb_dequeue(&sk->sk_receive_queue); |
1357 | if (skb) | |
1358 | break; | |
1359 | ||
1da177e4 | 1360 | if (flags & O_NONBLOCK) { |
75606dc6 RB |
1361 | err = -EWOULDBLOCK; |
1362 | break; | |
1da177e4 | 1363 | } |
75606dc6 RB |
1364 | if (!signal_pending(current)) { |
1365 | release_sock(sk); | |
1da177e4 LT |
1366 | schedule(); |
1367 | lock_sock(sk); | |
1368 | continue; | |
1369 | } | |
75606dc6 RB |
1370 | err = -ERESTARTSYS; |
1371 | break; | |
1da177e4 | 1372 | } |
aa395145 | 1373 | finish_wait(sk_sleep(sk), &wait); |
75606dc6 RB |
1374 | |
1375 | if (err) | |
1376 | goto out; | |
1da177e4 LT |
1377 | |
1378 | newsk = skb->sk; | |
9375cb8a | 1379 | sock_graft(newsk, newsock); |
1da177e4 LT |
1380 | |
1381 | /* Now attach up the new socket */ | |
1382 | kfree_skb(skb); | |
1383 | sk->sk_ack_backlog--; | |
1da177e4 LT |
1384 | newsock->state = SS_CONNECTED; |
1385 | ||
1386 | out: | |
1387 | release_sock(sk); | |
1388 | ||
1389 | return err; | |
1390 | } | |
1391 | ||
1392 | static int ax25_getname(struct socket *sock, struct sockaddr *uaddr, | |
1393 | int *uaddr_len, int peer) | |
1394 | { | |
1395 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr; | |
1396 | struct sock *sk = sock->sk; | |
1397 | unsigned char ndigi, i; | |
1398 | ax25_cb *ax25; | |
1399 | int err = 0; | |
1400 | ||
5b919f83 | 1401 | memset(fsa, 0, sizeof(*fsa)); |
1da177e4 LT |
1402 | lock_sock(sk); |
1403 | ax25 = ax25_sk(sk); | |
1404 | ||
1405 | if (peer != 0) { | |
1406 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1407 | err = -ENOTCONN; | |
1408 | goto out; | |
1409 | } | |
1410 | ||
1411 | fsa->fsa_ax25.sax25_family = AF_AX25; | |
1412 | fsa->fsa_ax25.sax25_call = ax25->dest_addr; | |
1da177e4 LT |
1413 | |
1414 | if (ax25->digipeat != NULL) { | |
1415 | ndigi = ax25->digipeat->ndigi; | |
1416 | fsa->fsa_ax25.sax25_ndigis = ndigi; | |
1417 | for (i = 0; i < ndigi; i++) | |
1418 | fsa->fsa_digipeater[i] = | |
1419 | ax25->digipeat->calls[i]; | |
1420 | } | |
1421 | } else { | |
1422 | fsa->fsa_ax25.sax25_family = AF_AX25; | |
1423 | fsa->fsa_ax25.sax25_call = ax25->source_addr; | |
1424 | fsa->fsa_ax25.sax25_ndigis = 1; | |
1425 | if (ax25->ax25_dev != NULL) { | |
1426 | memcpy(&fsa->fsa_digipeater[0], | |
1427 | ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN); | |
1428 | } else { | |
1429 | fsa->fsa_digipeater[0] = null_ax25_address; | |
1430 | } | |
1431 | } | |
1432 | *uaddr_len = sizeof (struct full_sockaddr_ax25); | |
1433 | ||
1434 | out: | |
1435 | release_sock(sk); | |
1436 | ||
1437 | return err; | |
1438 | } | |
1439 | ||
1440 | static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1441 | struct msghdr *msg, size_t len) | |
1442 | { | |
1443 | struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name; | |
1444 | struct sock *sk = sock->sk; | |
1445 | struct sockaddr_ax25 sax; | |
1446 | struct sk_buff *skb; | |
1447 | ax25_digi dtmp, *dp; | |
1da177e4 LT |
1448 | ax25_cb *ax25; |
1449 | size_t size; | |
1450 | int lv, err, addr_len = msg->msg_namelen; | |
1451 | ||
1452 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) | |
1453 | return -EINVAL; | |
1454 | ||
1455 | lock_sock(sk); | |
1456 | ax25 = ax25_sk(sk); | |
1457 | ||
1458 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
1459 | err = -EADDRNOTAVAIL; | |
1460 | goto out; | |
1461 | } | |
1462 | ||
1463 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1464 | send_sig(SIGPIPE, current, 0); | |
1465 | err = -EPIPE; | |
1466 | goto out; | |
1467 | } | |
1468 | ||
1469 | if (ax25->ax25_dev == NULL) { | |
1470 | err = -ENETUNREACH; | |
1471 | goto out; | |
1472 | } | |
1473 | ||
1474 | if (len > ax25->ax25_dev->dev->mtu) { | |
1475 | err = -EMSGSIZE; | |
1476 | goto out; | |
1477 | } | |
528930b9 | 1478 | |
1da177e4 LT |
1479 | if (usax != NULL) { |
1480 | if (usax->sax25_family != AF_AX25) { | |
1481 | err = -EINVAL; | |
1482 | goto out; | |
1483 | } | |
1484 | ||
27d1cba2 | 1485 | if (addr_len == sizeof(struct sockaddr_ax25)) |
1486 | /* ax25_sendmsg(): uses obsolete socket structure */ | |
1487 | ; | |
1488 | else if (addr_len != sizeof(struct full_sockaddr_ax25)) | |
1489 | /* support for old structure may go away some time | |
1490 | * ax25_sendmsg(): uses old (6 digipeater) | |
1491 | * socket structure. | |
1492 | */ | |
1da177e4 | 1493 | if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || |
528930b9 YH |
1494 | (addr_len > sizeof(struct full_sockaddr_ax25))) { |
1495 | err = -EINVAL; | |
1da177e4 LT |
1496 | goto out; |
1497 | } | |
1498 | ||
1da177e4 LT |
1499 | |
1500 | if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) { | |
1501 | int ct = 0; | |
1502 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax; | |
1503 | ||
1504 | /* Valid number of digipeaters ? */ | |
1505 | if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) { | |
1506 | err = -EINVAL; | |
1507 | goto out; | |
1508 | } | |
1509 | ||
1510 | dtmp.ndigi = usax->sax25_ndigis; | |
1511 | ||
1512 | while (ct < usax->sax25_ndigis) { | |
1513 | dtmp.repeated[ct] = 0; | |
1514 | dtmp.calls[ct] = fsa->fsa_digipeater[ct]; | |
1515 | ct++; | |
1516 | } | |
1517 | ||
1518 | dtmp.lastrepeat = 0; | |
1519 | } | |
1520 | ||
1521 | sax = *usax; | |
1522 | if (sk->sk_type == SOCK_SEQPACKET && | |
1523 | ax25cmp(&ax25->dest_addr, &sax.sax25_call)) { | |
1524 | err = -EISCONN; | |
1525 | goto out; | |
1526 | } | |
1527 | if (usax->sax25_ndigis == 0) | |
1528 | dp = NULL; | |
1529 | else | |
1530 | dp = &dtmp; | |
1531 | } else { | |
1532 | /* | |
1533 | * FIXME: 1003.1g - if the socket is like this because | |
1534 | * it has become closed (not started closed) and is VC | |
1535 | * we ought to SIGPIPE, EPIPE | |
1536 | */ | |
1537 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1538 | err = -ENOTCONN; | |
1539 | goto out; | |
1540 | } | |
1541 | sax.sax25_family = AF_AX25; | |
1542 | sax.sax25_call = ax25->dest_addr; | |
1543 | dp = ax25->digipeat; | |
1544 | } | |
1545 | ||
1da177e4 | 1546 | /* Build a packet */ |
1da177e4 LT |
1547 | /* Assume the worst case */ |
1548 | size = len + ax25->ax25_dev->dev->hard_header_len; | |
1549 | ||
1550 | skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err); | |
1551 | if (skb == NULL) | |
1552 | goto out; | |
1553 | ||
1554 | skb_reserve(skb, size - len); | |
1555 | ||
1da177e4 LT |
1556 | /* User data follows immediately after the AX.25 data */ |
1557 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { | |
1558 | err = -EFAULT; | |
1559 | kfree_skb(skb); | |
1560 | goto out; | |
1561 | } | |
1562 | ||
c1d2bbe1 | 1563 | skb_reset_network_header(skb); |
1da177e4 LT |
1564 | |
1565 | /* Add the PID if one is not supplied by the user in the skb */ | |
967b05f6 ACM |
1566 | if (!ax25->pidincl) |
1567 | *skb_push(skb, 1) = sk->sk_protocol; | |
1da177e4 | 1568 | |
1da177e4 LT |
1569 | if (sk->sk_type == SOCK_SEQPACKET) { |
1570 | /* Connected mode sockets go via the LAPB machine */ | |
1571 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1572 | kfree_skb(skb); | |
1573 | err = -ENOTCONN; | |
1574 | goto out; | |
1575 | } | |
1576 | ||
1577 | /* Shove it onto the queue and kick */ | |
1578 | ax25_output(ax25, ax25->paclen, skb); | |
1579 | ||
1580 | err = len; | |
1581 | goto out; | |
1582 | } | |
1583 | ||
967b05f6 | 1584 | skb_push(skb, 1 + ax25_addr_size(dp)); |
1da177e4 | 1585 | |
8849b720 | 1586 | /* Building AX.25 Header */ |
1da177e4 LT |
1587 | |
1588 | /* Build an AX.25 header */ | |
967b05f6 ACM |
1589 | lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call, |
1590 | dp, AX25_COMMAND, AX25_MODULUS); | |
1da177e4 | 1591 | |
967b05f6 | 1592 | skb_set_transport_header(skb, lv); |
1da177e4 | 1593 | |
9c70220b | 1594 | *skb_transport_header(skb) = AX25_UI; |
1da177e4 LT |
1595 | |
1596 | /* Datagram frames go straight out of the door as UI */ | |
29c4be51 | 1597 | ax25_queue_xmit(skb, ax25->ax25_dev->dev); |
1da177e4 LT |
1598 | |
1599 | err = len; | |
1600 | ||
1601 | out: | |
1602 | release_sock(sk); | |
1603 | ||
1604 | return err; | |
1605 | } | |
1606 | ||
1607 | static int ax25_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1608 | struct msghdr *msg, size_t size, int flags) | |
1609 | { | |
1610 | struct sock *sk = sock->sk; | |
1611 | struct sk_buff *skb; | |
1612 | int copied; | |
1613 | int err = 0; | |
1614 | ||
1615 | lock_sock(sk); | |
1616 | /* | |
1617 | * This works for seqpacket too. The receiver has ordered the | |
1618 | * queue for us! We do one quick check first though | |
1619 | */ | |
1620 | if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) { | |
1621 | err = -ENOTCONN; | |
1622 | goto out; | |
1623 | } | |
1624 | ||
1625 | /* Now we can treat all alike */ | |
1626 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, | |
528930b9 | 1627 | flags & MSG_DONTWAIT, &err); |
1da177e4 LT |
1628 | if (skb == NULL) |
1629 | goto out; | |
1630 | ||
1631 | if (!ax25_sk(sk)->pidincl) | |
1632 | skb_pull(skb, 1); /* Remove PID */ | |
1633 | ||
badff6d0 ACM |
1634 | skb_reset_transport_header(skb); |
1635 | copied = skb->len; | |
1da177e4 LT |
1636 | |
1637 | if (copied > size) { | |
1638 | copied = size; | |
1639 | msg->msg_flags |= MSG_TRUNC; | |
1640 | } | |
1641 | ||
1642 | skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
1643 | ||
1644 | if (msg->msg_namelen != 0) { | |
1645 | struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name; | |
1646 | ax25_digi digi; | |
1647 | ax25_address src; | |
98e399f8 | 1648 | const unsigned char *mac = skb_mac_header(skb); |
1da177e4 | 1649 | |
98e399f8 ACM |
1650 | ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL, |
1651 | &digi, NULL, NULL); | |
1da177e4 LT |
1652 | sax->sax25_family = AF_AX25; |
1653 | /* We set this correctly, even though we may not let the | |
1654 | application know the digi calls further down (because it | |
1655 | did NOT ask to know them). This could get political... **/ | |
1656 | sax->sax25_ndigis = digi.ndigi; | |
1657 | sax->sax25_call = src; | |
1658 | ||
1659 | if (sax->sax25_ndigis != 0) { | |
1660 | int ct; | |
1661 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax; | |
1662 | ||
1663 | for (ct = 0; ct < digi.ndigi; ct++) | |
1664 | fsa->fsa_digipeater[ct] = digi.calls[ct]; | |
1665 | } | |
1666 | msg->msg_namelen = sizeof(struct full_sockaddr_ax25); | |
1667 | } | |
1668 | ||
1669 | skb_free_datagram(sk, skb); | |
1670 | err = copied; | |
1671 | ||
1672 | out: | |
1673 | release_sock(sk); | |
1674 | ||
1675 | return err; | |
1676 | } | |
1677 | ||
1678 | static int ax25_shutdown(struct socket *sk, int how) | |
1679 | { | |
1680 | /* FIXME - generate DM and RNR states */ | |
1681 | return -EOPNOTSUPP; | |
1682 | } | |
1683 | ||
1684 | static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1685 | { | |
1686 | struct sock *sk = sock->sk; | |
1687 | void __user *argp = (void __user *)arg; | |
1688 | int res = 0; | |
1689 | ||
1690 | lock_sock(sk); | |
1691 | switch (cmd) { | |
1692 | case TIOCOUTQ: { | |
1693 | long amount; | |
31e6d363 ED |
1694 | |
1695 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); | |
1da177e4 LT |
1696 | if (amount < 0) |
1697 | amount = 0; | |
1698 | res = put_user(amount, (int __user *)argp); | |
1699 | break; | |
1700 | } | |
1701 | ||
1702 | case TIOCINQ: { | |
1703 | struct sk_buff *skb; | |
1704 | long amount = 0L; | |
1705 | /* These two are safe on a single CPU system as only user tasks fiddle here */ | |
1706 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) | |
1707 | amount = skb->len; | |
20b7d10a | 1708 | res = put_user(amount, (int __user *) argp); |
1da177e4 LT |
1709 | break; |
1710 | } | |
1711 | ||
1712 | case SIOCGSTAMP: | |
9b37ee75 | 1713 | res = sock_get_timestamp(sk, argp); |
1da177e4 LT |
1714 | break; |
1715 | ||
ae40eb1e ED |
1716 | case SIOCGSTAMPNS: |
1717 | res = sock_get_timestampns(sk, argp); | |
1718 | break; | |
1719 | ||
1da177e4 LT |
1720 | case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */ |
1721 | case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */ | |
1722 | case SIOCAX25GETUID: { | |
1723 | struct sockaddr_ax25 sax25; | |
1724 | if (copy_from_user(&sax25, argp, sizeof(sax25))) { | |
1725 | res = -EFAULT; | |
1726 | break; | |
1727 | } | |
1728 | res = ax25_uid_ioctl(cmd, &sax25); | |
1729 | break; | |
1730 | } | |
1731 | ||
1732 | case SIOCAX25NOUID: { /* Set the default policy (default/bar) */ | |
1733 | long amount; | |
1734 | if (!capable(CAP_NET_ADMIN)) { | |
1735 | res = -EPERM; | |
1736 | break; | |
1737 | } | |
1738 | if (get_user(amount, (long __user *)argp)) { | |
1739 | res = -EFAULT; | |
1740 | break; | |
1741 | } | |
1742 | if (amount > AX25_NOUID_BLOCK) { | |
1743 | res = -EINVAL; | |
1744 | break; | |
1745 | } | |
1746 | ax25_uid_policy = amount; | |
1747 | res = 0; | |
1748 | break; | |
1749 | } | |
1750 | ||
1751 | case SIOCADDRT: | |
1752 | case SIOCDELRT: | |
1753 | case SIOCAX25OPTRT: | |
1754 | if (!capable(CAP_NET_ADMIN)) { | |
1755 | res = -EPERM; | |
1756 | break; | |
1757 | } | |
1758 | res = ax25_rt_ioctl(cmd, argp); | |
1759 | break; | |
1760 | ||
1761 | case SIOCAX25CTLCON: | |
1762 | if (!capable(CAP_NET_ADMIN)) { | |
1763 | res = -EPERM; | |
1764 | break; | |
1765 | } | |
1766 | res = ax25_ctl_ioctl(cmd, argp); | |
1767 | break; | |
1768 | ||
1769 | case SIOCAX25GETINFO: | |
1770 | case SIOCAX25GETINFOOLD: { | |
1771 | ax25_cb *ax25 = ax25_sk(sk); | |
1772 | struct ax25_info_struct ax25_info; | |
1773 | ||
1774 | ax25_info.t1 = ax25->t1 / HZ; | |
1775 | ax25_info.t2 = ax25->t2 / HZ; | |
1776 | ax25_info.t3 = ax25->t3 / HZ; | |
1777 | ax25_info.idle = ax25->idle / (60 * HZ); | |
1778 | ax25_info.n2 = ax25->n2; | |
1779 | ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ; | |
1780 | ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ; | |
1781 | ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ; | |
1782 | ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ); | |
1783 | ax25_info.n2count = ax25->n2count; | |
1784 | ax25_info.state = ax25->state; | |
407fc5cf ED |
1785 | ax25_info.rcv_q = sk_rmem_alloc_get(sk); |
1786 | ax25_info.snd_q = sk_wmem_alloc_get(sk); | |
1da177e4 LT |
1787 | ax25_info.vs = ax25->vs; |
1788 | ax25_info.vr = ax25->vr; | |
1789 | ax25_info.va = ax25->va; | |
1790 | ax25_info.vs_max = ax25->vs; /* reserved */ | |
1791 | ax25_info.paclen = ax25->paclen; | |
1792 | ax25_info.window = ax25->window; | |
1793 | ||
1794 | /* old structure? */ | |
1795 | if (cmd == SIOCAX25GETINFOOLD) { | |
1796 | static int warned = 0; | |
1797 | if (!warned) { | |
1798 | printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n", | |
1799 | current->comm); | |
1800 | warned=1; | |
1801 | } | |
1802 | ||
1803 | if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) { | |
1804 | res = -EFAULT; | |
1805 | break; | |
1806 | } | |
1807 | } else { | |
1808 | if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) { | |
1809 | res = -EINVAL; | |
1810 | break; | |
1811 | } | |
1812 | } | |
1813 | res = 0; | |
1814 | break; | |
1815 | } | |
1816 | ||
1817 | case SIOCAX25ADDFWD: | |
1818 | case SIOCAX25DELFWD: { | |
1819 | struct ax25_fwd_struct ax25_fwd; | |
1820 | if (!capable(CAP_NET_ADMIN)) { | |
1821 | res = -EPERM; | |
1822 | break; | |
1823 | } | |
1824 | if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) { | |
1825 | res = -EFAULT; | |
1826 | break; | |
1827 | } | |
1828 | res = ax25_fwd_ioctl(cmd, &ax25_fwd); | |
1829 | break; | |
1830 | } | |
1831 | ||
1832 | case SIOCGIFADDR: | |
1833 | case SIOCSIFADDR: | |
1834 | case SIOCGIFDSTADDR: | |
1835 | case SIOCSIFDSTADDR: | |
1836 | case SIOCGIFBRDADDR: | |
1837 | case SIOCSIFBRDADDR: | |
1838 | case SIOCGIFNETMASK: | |
1839 | case SIOCSIFNETMASK: | |
1840 | case SIOCGIFMETRIC: | |
1841 | case SIOCSIFMETRIC: | |
1842 | res = -EINVAL; | |
1843 | break; | |
1844 | ||
1845 | default: | |
b5e5fa5e | 1846 | res = -ENOIOCTLCMD; |
1da177e4 LT |
1847 | break; |
1848 | } | |
1849 | release_sock(sk); | |
1850 | ||
1851 | return res; | |
1852 | } | |
1853 | ||
1854 | #ifdef CONFIG_PROC_FS | |
1855 | ||
1856 | static void *ax25_info_start(struct seq_file *seq, loff_t *pos) | |
f16f3026 | 1857 | __acquires(ax25_list_lock) |
1da177e4 | 1858 | { |
1da177e4 | 1859 | spin_lock_bh(&ax25_list_lock); |
b512f3d8 | 1860 | return seq_hlist_start(&ax25_list, *pos); |
1da177e4 LT |
1861 | } |
1862 | ||
1863 | static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos) | |
1864 | { | |
b512f3d8 | 1865 | return seq_hlist_next(v, &ax25_list, pos); |
1da177e4 | 1866 | } |
528930b9 | 1867 | |
1da177e4 | 1868 | static void ax25_info_stop(struct seq_file *seq, void *v) |
f16f3026 | 1869 | __releases(ax25_list_lock) |
1da177e4 LT |
1870 | { |
1871 | spin_unlock_bh(&ax25_list_lock); | |
1872 | } | |
1873 | ||
1874 | static int ax25_info_show(struct seq_file *seq, void *v) | |
1875 | { | |
b512f3d8 | 1876 | ax25_cb *ax25 = hlist_entry(v, struct ax25_cb, ax25_node); |
f75268cd | 1877 | char buf[11]; |
1da177e4 LT |
1878 | int k; |
1879 | ||
1880 | ||
1881 | /* | |
1882 | * New format: | |
1883 | * 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 | |
1884 | */ | |
1885 | ||
1886 | seq_printf(seq, "%8.8lx %s %s%s ", | |
1887 | (long) ax25, | |
1888 | ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name, | |
f75268cd | 1889 | ax2asc(buf, &ax25->source_addr), |
1da177e4 | 1890 | ax25->iamdigi? "*":""); |
f75268cd | 1891 | seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr)); |
1da177e4 LT |
1892 | |
1893 | for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) { | |
1894 | seq_printf(seq, ",%s%s", | |
f75268cd | 1895 | ax2asc(buf, &ax25->digipeat->calls[k]), |
1da177e4 LT |
1896 | ax25->digipeat->repeated[k]? "*":""); |
1897 | } | |
1898 | ||
1899 | seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d", | |
1900 | ax25->state, | |
1901 | ax25->vs, ax25->vr, ax25->va, | |
1902 | ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ, | |
1903 | ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ, | |
1904 | ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ, | |
1905 | ax25_display_timer(&ax25->idletimer) / (60 * HZ), | |
1906 | ax25->idle / (60 * HZ), | |
1907 | ax25->n2count, ax25->n2, | |
1908 | ax25->rtt / HZ, | |
1909 | ax25->window, | |
1910 | ax25->paclen); | |
1911 | ||
1912 | if (ax25->sk != NULL) { | |
1105b5d1 | 1913 | seq_printf(seq, " %d %d %lu\n", |
31e6d363 ED |
1914 | sk_wmem_alloc_get(ax25->sk), |
1915 | sk_rmem_alloc_get(ax25->sk), | |
1105b5d1 | 1916 | sock_i_ino(ax25->sk)); |
1da177e4 LT |
1917 | } else { |
1918 | seq_puts(seq, " * * *\n"); | |
1919 | } | |
1920 | return 0; | |
1921 | } | |
1922 | ||
56b3d975 | 1923 | static const struct seq_operations ax25_info_seqops = { |
1da177e4 LT |
1924 | .start = ax25_info_start, |
1925 | .next = ax25_info_next, | |
1926 | .stop = ax25_info_stop, | |
1927 | .show = ax25_info_show, | |
1928 | }; | |
1929 | ||
1930 | static int ax25_info_open(struct inode *inode, struct file *file) | |
1931 | { | |
1932 | return seq_open(file, &ax25_info_seqops); | |
1933 | } | |
1934 | ||
9a32144e | 1935 | static const struct file_operations ax25_info_fops = { |
1da177e4 LT |
1936 | .owner = THIS_MODULE, |
1937 | .open = ax25_info_open, | |
1938 | .read = seq_read, | |
1939 | .llseek = seq_lseek, | |
1940 | .release = seq_release, | |
1941 | }; | |
1942 | ||
1943 | #endif | |
1944 | ||
ec1b4cf7 | 1945 | static const struct net_proto_family ax25_family_ops = { |
1da177e4 LT |
1946 | .family = PF_AX25, |
1947 | .create = ax25_create, | |
1948 | .owner = THIS_MODULE, | |
1949 | }; | |
1950 | ||
90ddc4f0 | 1951 | static const struct proto_ops ax25_proto_ops = { |
4676356b RB |
1952 | .family = PF_AX25, |
1953 | .owner = THIS_MODULE, | |
1954 | .release = ax25_release, | |
1955 | .bind = ax25_bind, | |
1956 | .connect = ax25_connect, | |
1957 | .socketpair = sock_no_socketpair, | |
1958 | .accept = ax25_accept, | |
1959 | .getname = ax25_getname, | |
1960 | .poll = datagram_poll, | |
1961 | .ioctl = ax25_ioctl, | |
1962 | .listen = ax25_listen, | |
1963 | .shutdown = ax25_shutdown, | |
1964 | .setsockopt = ax25_setsockopt, | |
1965 | .getsockopt = ax25_getsockopt, | |
1966 | .sendmsg = ax25_sendmsg, | |
1967 | .recvmsg = ax25_recvmsg, | |
1968 | .mmap = sock_no_mmap, | |
1969 | .sendpage = sock_no_sendpage, | |
1da177e4 LT |
1970 | }; |
1971 | ||
1972 | /* | |
1973 | * Called by socket.c on kernel start up | |
1974 | */ | |
7546dd97 | 1975 | static struct packet_type ax25_packet_type __read_mostly = { |
09640e63 | 1976 | .type = cpu_to_be16(ETH_P_AX25), |
1da177e4 LT |
1977 | .func = ax25_kiss_rcv, |
1978 | }; | |
1979 | ||
1980 | static struct notifier_block ax25_dev_notifier = { | |
1981 | .notifier_call =ax25_device_event, | |
1982 | }; | |
1983 | ||
1da177e4 LT |
1984 | static int __init ax25_init(void) |
1985 | { | |
1986 | int rc = proto_register(&ax25_proto, 0); | |
1987 | ||
1988 | if (rc != 0) | |
1989 | goto out; | |
1990 | ||
1991 | sock_register(&ax25_family_ops); | |
1992 | dev_add_pack(&ax25_packet_type); | |
1993 | register_netdevice_notifier(&ax25_dev_notifier); | |
1da177e4 | 1994 | |
d4beaa66 G |
1995 | proc_create("ax25_route", S_IRUGO, init_net.proc_net, |
1996 | &ax25_route_fops); | |
1997 | proc_create("ax25", S_IRUGO, init_net.proc_net, &ax25_info_fops); | |
1998 | proc_create("ax25_calls", S_IRUGO, init_net.proc_net, &ax25_uid_fops); | |
1da177e4 LT |
1999 | out: |
2000 | return rc; | |
2001 | } | |
2002 | module_init(ax25_init); | |
2003 | ||
2004 | ||
2005 | MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); | |
2006 | MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol"); | |
2007 | MODULE_LICENSE("GPL"); | |
2008 | MODULE_ALIAS_NETPROTO(PF_AX25); | |
2009 | ||
2010 | static void __exit ax25_exit(void) | |
2011 | { | |
457c4cbc EB |
2012 | proc_net_remove(&init_net, "ax25_route"); |
2013 | proc_net_remove(&init_net, "ax25"); | |
2014 | proc_net_remove(&init_net, "ax25_calls"); | |
1da177e4 | 2015 | |
1da177e4 LT |
2016 | unregister_netdevice_notifier(&ax25_dev_notifier); |
2017 | ||
2018 | dev_remove_pack(&ax25_packet_type); | |
2019 | ||
2020 | sock_unregister(PF_AX25); | |
2021 | proto_unregister(&ax25_proto); | |
3adadc08 EB |
2022 | |
2023 | ax25_rt_free(); | |
2024 | ax25_uid_free(); | |
2025 | ax25_dev_free(); | |
1da177e4 LT |
2026 | } |
2027 | module_exit(ax25_exit); |