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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) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) | |
8 | * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk) | |
9 | * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net) | |
10 | * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi) | |
11 | */ | |
4fc268d2 | 12 | |
4fc268d2 | 13 | #include <linux/capability.h> |
1da177e4 LT |
14 | #include <linux/module.h> |
15 | #include <linux/moduleparam.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/errno.h> | |
18 | #include <linux/types.h> | |
19 | #include <linux/socket.h> | |
20 | #include <linux/in.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/sched.h> | |
23 | #include <linux/spinlock.h> | |
24 | #include <linux/timer.h> | |
25 | #include <linux/string.h> | |
26 | #include <linux/sockios.h> | |
27 | #include <linux/net.h> | |
28 | #include <linux/stat.h> | |
29 | #include <net/ax25.h> | |
30 | #include <linux/inet.h> | |
31 | #include <linux/netdevice.h> | |
32 | #include <linux/if_arp.h> | |
33 | #include <linux/skbuff.h> | |
34 | #include <net/sock.h> | |
35 | #include <asm/system.h> | |
36 | #include <asm/uaccess.h> | |
37 | #include <linux/fcntl.h> | |
38 | #include <linux/termios.h> | |
39 | #include <linux/mm.h> | |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/notifier.h> | |
42 | #include <net/rose.h> | |
43 | #include <linux/proc_fs.h> | |
44 | #include <linux/seq_file.h> | |
c752f073 | 45 | #include <net/tcp_states.h> |
1da177e4 LT |
46 | #include <net/ip.h> |
47 | #include <net/arp.h> | |
48 | ||
49 | static int rose_ndevs = 10; | |
50 | ||
51 | int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0; | |
52 | int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1; | |
53 | int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2; | |
54 | int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3; | |
55 | int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE; | |
56 | int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB; | |
57 | int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING; | |
58 | int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT; | |
59 | int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC; | |
60 | int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE; | |
61 | ||
62 | static HLIST_HEAD(rose_list); | |
63 | static DEFINE_SPINLOCK(rose_list_lock); | |
64 | ||
65 | static struct proto_ops rose_proto_ops; | |
66 | ||
67 | ax25_address rose_callsign; | |
68 | ||
69 | /* | |
70 | * Convert a ROSE address into text. | |
71 | */ | |
72 | const char *rose2asc(const rose_address *addr) | |
73 | { | |
74 | static char buffer[11]; | |
75 | ||
76 | if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 && | |
77 | addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 && | |
78 | addr->rose_addr[4] == 0x00) { | |
79 | strcpy(buffer, "*"); | |
80 | } else { | |
81 | sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF, | |
82 | addr->rose_addr[1] & 0xFF, | |
83 | addr->rose_addr[2] & 0xFF, | |
84 | addr->rose_addr[3] & 0xFF, | |
85 | addr->rose_addr[4] & 0xFF); | |
86 | } | |
87 | ||
88 | return buffer; | |
89 | } | |
90 | ||
91 | /* | |
92 | * Compare two ROSE addresses, 0 == equal. | |
93 | */ | |
94 | int rosecmp(rose_address *addr1, rose_address *addr2) | |
95 | { | |
96 | int i; | |
97 | ||
98 | for (i = 0; i < 5; i++) | |
99 | if (addr1->rose_addr[i] != addr2->rose_addr[i]) | |
100 | return 1; | |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
105 | /* | |
106 | * Compare two ROSE addresses for only mask digits, 0 == equal. | |
107 | */ | |
108 | int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask) | |
109 | { | |
110 | int i, j; | |
111 | ||
112 | if (mask > 10) | |
113 | return 1; | |
114 | ||
115 | for (i = 0; i < mask; i++) { | |
116 | j = i / 2; | |
117 | ||
118 | if ((i % 2) != 0) { | |
119 | if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F)) | |
120 | return 1; | |
121 | } else { | |
122 | if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0)) | |
123 | return 1; | |
124 | } | |
125 | } | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | /* | |
131 | * Socket removal during an interrupt is now safe. | |
132 | */ | |
133 | static void rose_remove_socket(struct sock *sk) | |
134 | { | |
135 | spin_lock_bh(&rose_list_lock); | |
136 | sk_del_node_init(sk); | |
137 | spin_unlock_bh(&rose_list_lock); | |
138 | } | |
139 | ||
140 | /* | |
141 | * Kill all bound sockets on a broken link layer connection to a | |
142 | * particular neighbour. | |
143 | */ | |
144 | void rose_kill_by_neigh(struct rose_neigh *neigh) | |
145 | { | |
146 | struct sock *s; | |
147 | struct hlist_node *node; | |
148 | ||
149 | spin_lock_bh(&rose_list_lock); | |
150 | sk_for_each(s, node, &rose_list) { | |
151 | struct rose_sock *rose = rose_sk(s); | |
152 | ||
153 | if (rose->neighbour == neigh) { | |
154 | rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); | |
155 | rose->neighbour->use--; | |
156 | rose->neighbour = NULL; | |
157 | } | |
158 | } | |
159 | spin_unlock_bh(&rose_list_lock); | |
160 | } | |
161 | ||
162 | /* | |
163 | * Kill all bound sockets on a dropped device. | |
164 | */ | |
165 | static void rose_kill_by_device(struct net_device *dev) | |
166 | { | |
167 | struct sock *s; | |
168 | struct hlist_node *node; | |
169 | ||
170 | spin_lock_bh(&rose_list_lock); | |
171 | sk_for_each(s, node, &rose_list) { | |
172 | struct rose_sock *rose = rose_sk(s); | |
173 | ||
174 | if (rose->device == dev) { | |
175 | rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); | |
176 | rose->neighbour->use--; | |
177 | rose->device = NULL; | |
178 | } | |
179 | } | |
180 | spin_unlock_bh(&rose_list_lock); | |
181 | } | |
182 | ||
183 | /* | |
184 | * Handle device status changes. | |
185 | */ | |
186 | static int rose_device_event(struct notifier_block *this, unsigned long event, | |
187 | void *ptr) | |
188 | { | |
189 | struct net_device *dev = (struct net_device *)ptr; | |
190 | ||
191 | if (event != NETDEV_DOWN) | |
192 | return NOTIFY_DONE; | |
193 | ||
194 | switch (dev->type) { | |
195 | case ARPHRD_ROSE: | |
196 | rose_kill_by_device(dev); | |
197 | break; | |
198 | case ARPHRD_AX25: | |
199 | rose_link_device_down(dev); | |
200 | rose_rt_device_down(dev); | |
201 | break; | |
202 | } | |
203 | ||
204 | return NOTIFY_DONE; | |
205 | } | |
206 | ||
207 | /* | |
208 | * Add a socket to the bound sockets list. | |
209 | */ | |
210 | static void rose_insert_socket(struct sock *sk) | |
211 | { | |
212 | ||
213 | spin_lock_bh(&rose_list_lock); | |
214 | sk_add_node(sk, &rose_list); | |
215 | spin_unlock_bh(&rose_list_lock); | |
216 | } | |
217 | ||
218 | /* | |
219 | * Find a socket that wants to accept the Call Request we just | |
220 | * received. | |
221 | */ | |
222 | static struct sock *rose_find_listener(rose_address *addr, ax25_address *call) | |
223 | { | |
224 | struct sock *s; | |
225 | struct hlist_node *node; | |
226 | ||
227 | spin_lock_bh(&rose_list_lock); | |
228 | sk_for_each(s, node, &rose_list) { | |
229 | struct rose_sock *rose = rose_sk(s); | |
230 | ||
231 | if (!rosecmp(&rose->source_addr, addr) && | |
232 | !ax25cmp(&rose->source_call, call) && | |
233 | !rose->source_ndigis && s->sk_state == TCP_LISTEN) | |
234 | goto found; | |
235 | } | |
236 | ||
237 | sk_for_each(s, node, &rose_list) { | |
238 | struct rose_sock *rose = rose_sk(s); | |
239 | ||
240 | if (!rosecmp(&rose->source_addr, addr) && | |
241 | !ax25cmp(&rose->source_call, &null_ax25_address) && | |
242 | s->sk_state == TCP_LISTEN) | |
243 | goto found; | |
244 | } | |
245 | s = NULL; | |
246 | found: | |
247 | spin_unlock_bh(&rose_list_lock); | |
248 | return s; | |
249 | } | |
250 | ||
251 | /* | |
252 | * Find a connected ROSE socket given my LCI and device. | |
253 | */ | |
254 | struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh) | |
255 | { | |
256 | struct sock *s; | |
257 | struct hlist_node *node; | |
258 | ||
259 | spin_lock_bh(&rose_list_lock); | |
260 | sk_for_each(s, node, &rose_list) { | |
261 | struct rose_sock *rose = rose_sk(s); | |
262 | ||
263 | if (rose->lci == lci && rose->neighbour == neigh) | |
264 | goto found; | |
265 | } | |
266 | s = NULL; | |
267 | found: | |
268 | spin_unlock_bh(&rose_list_lock); | |
269 | return s; | |
270 | } | |
271 | ||
272 | /* | |
273 | * Find a unique LCI for a given device. | |
274 | */ | |
275 | unsigned int rose_new_lci(struct rose_neigh *neigh) | |
276 | { | |
277 | int lci; | |
278 | ||
279 | if (neigh->dce_mode) { | |
280 | for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++) | |
281 | if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) | |
282 | return lci; | |
283 | } else { | |
284 | for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--) | |
285 | if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) | |
286 | return lci; | |
287 | } | |
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
292 | /* | |
293 | * Deferred destroy. | |
294 | */ | |
295 | void rose_destroy_socket(struct sock *); | |
296 | ||
297 | /* | |
298 | * Handler for deferred kills. | |
299 | */ | |
300 | static void rose_destroy_timer(unsigned long data) | |
301 | { | |
302 | rose_destroy_socket((struct sock *)data); | |
303 | } | |
304 | ||
305 | /* | |
306 | * This is called from user mode and the timers. Thus it protects itself | |
307 | * against interrupt users but doesn't worry about being called during | |
308 | * work. Once it is removed from the queue no interrupt or bottom half | |
309 | * will touch it and we are (fairly 8-) ) safe. | |
310 | */ | |
311 | void rose_destroy_socket(struct sock *sk) | |
312 | { | |
313 | struct sk_buff *skb; | |
314 | ||
315 | rose_remove_socket(sk); | |
316 | rose_stop_heartbeat(sk); | |
317 | rose_stop_idletimer(sk); | |
318 | rose_stop_timer(sk); | |
319 | ||
320 | rose_clear_queues(sk); /* Flush the queues */ | |
321 | ||
322 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
323 | if (skb->sk != sk) { /* A pending connection */ | |
324 | /* Queue the unaccepted socket for death */ | |
325 | sock_set_flag(skb->sk, SOCK_DEAD); | |
326 | rose_start_heartbeat(skb->sk); | |
327 | rose_sk(skb->sk)->state = ROSE_STATE_0; | |
328 | } | |
329 | ||
330 | kfree_skb(skb); | |
331 | } | |
332 | ||
333 | if (atomic_read(&sk->sk_wmem_alloc) || | |
334 | atomic_read(&sk->sk_rmem_alloc)) { | |
335 | /* Defer: outstanding buffers */ | |
336 | init_timer(&sk->sk_timer); | |
337 | sk->sk_timer.expires = jiffies + 10 * HZ; | |
338 | sk->sk_timer.function = rose_destroy_timer; | |
339 | sk->sk_timer.data = (unsigned long)sk; | |
340 | add_timer(&sk->sk_timer); | |
341 | } else | |
342 | sock_put(sk); | |
343 | } | |
344 | ||
345 | /* | |
346 | * Handling for system calls applied via the various interfaces to a | |
347 | * ROSE socket object. | |
348 | */ | |
349 | ||
350 | static int rose_setsockopt(struct socket *sock, int level, int optname, | |
351 | char __user *optval, int optlen) | |
352 | { | |
353 | struct sock *sk = sock->sk; | |
354 | struct rose_sock *rose = rose_sk(sk); | |
355 | int opt; | |
356 | ||
357 | if (level != SOL_ROSE) | |
358 | return -ENOPROTOOPT; | |
359 | ||
360 | if (optlen < sizeof(int)) | |
361 | return -EINVAL; | |
362 | ||
363 | if (get_user(opt, (int __user *)optval)) | |
364 | return -EFAULT; | |
365 | ||
366 | switch (optname) { | |
367 | case ROSE_DEFER: | |
368 | rose->defer = opt ? 1 : 0; | |
369 | return 0; | |
370 | ||
371 | case ROSE_T1: | |
372 | if (opt < 1) | |
373 | return -EINVAL; | |
374 | rose->t1 = opt * HZ; | |
375 | return 0; | |
376 | ||
377 | case ROSE_T2: | |
378 | if (opt < 1) | |
379 | return -EINVAL; | |
380 | rose->t2 = opt * HZ; | |
381 | return 0; | |
382 | ||
383 | case ROSE_T3: | |
384 | if (opt < 1) | |
385 | return -EINVAL; | |
386 | rose->t3 = opt * HZ; | |
387 | return 0; | |
388 | ||
389 | case ROSE_HOLDBACK: | |
390 | if (opt < 1) | |
391 | return -EINVAL; | |
392 | rose->hb = opt * HZ; | |
393 | return 0; | |
394 | ||
395 | case ROSE_IDLE: | |
396 | if (opt < 0) | |
397 | return -EINVAL; | |
398 | rose->idle = opt * 60 * HZ; | |
399 | return 0; | |
400 | ||
401 | case ROSE_QBITINCL: | |
402 | rose->qbitincl = opt ? 1 : 0; | |
403 | return 0; | |
404 | ||
405 | default: | |
406 | return -ENOPROTOOPT; | |
407 | } | |
408 | } | |
409 | ||
410 | static int rose_getsockopt(struct socket *sock, int level, int optname, | |
411 | char __user *optval, int __user *optlen) | |
412 | { | |
413 | struct sock *sk = sock->sk; | |
414 | struct rose_sock *rose = rose_sk(sk); | |
415 | int val = 0; | |
416 | int len; | |
417 | ||
418 | if (level != SOL_ROSE) | |
419 | return -ENOPROTOOPT; | |
420 | ||
421 | if (get_user(len, optlen)) | |
422 | return -EFAULT; | |
423 | ||
424 | if (len < 0) | |
425 | return -EINVAL; | |
426 | ||
427 | switch (optname) { | |
428 | case ROSE_DEFER: | |
429 | val = rose->defer; | |
430 | break; | |
431 | ||
432 | case ROSE_T1: | |
433 | val = rose->t1 / HZ; | |
434 | break; | |
435 | ||
436 | case ROSE_T2: | |
437 | val = rose->t2 / HZ; | |
438 | break; | |
439 | ||
440 | case ROSE_T3: | |
441 | val = rose->t3 / HZ; | |
442 | break; | |
443 | ||
444 | case ROSE_HOLDBACK: | |
445 | val = rose->hb / HZ; | |
446 | break; | |
447 | ||
448 | case ROSE_IDLE: | |
449 | val = rose->idle / (60 * HZ); | |
450 | break; | |
451 | ||
452 | case ROSE_QBITINCL: | |
453 | val = rose->qbitincl; | |
454 | break; | |
455 | ||
456 | default: | |
457 | return -ENOPROTOOPT; | |
458 | } | |
459 | ||
460 | len = min_t(unsigned int, len, sizeof(int)); | |
461 | ||
462 | if (put_user(len, optlen)) | |
463 | return -EFAULT; | |
464 | ||
465 | return copy_to_user(optval, &val, len) ? -EFAULT : 0; | |
466 | } | |
467 | ||
468 | static int rose_listen(struct socket *sock, int backlog) | |
469 | { | |
470 | struct sock *sk = sock->sk; | |
471 | ||
472 | if (sk->sk_state != TCP_LISTEN) { | |
473 | struct rose_sock *rose = rose_sk(sk); | |
474 | ||
475 | rose->dest_ndigis = 0; | |
476 | memset(&rose->dest_addr, 0, ROSE_ADDR_LEN); | |
477 | memset(&rose->dest_call, 0, AX25_ADDR_LEN); | |
478 | memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS); | |
479 | sk->sk_max_ack_backlog = backlog; | |
480 | sk->sk_state = TCP_LISTEN; | |
481 | return 0; | |
482 | } | |
483 | ||
484 | return -EOPNOTSUPP; | |
485 | } | |
486 | ||
487 | static struct proto rose_proto = { | |
488 | .name = "ROSE", | |
489 | .owner = THIS_MODULE, | |
490 | .obj_size = sizeof(struct rose_sock), | |
491 | }; | |
492 | ||
493 | static int rose_create(struct socket *sock, int protocol) | |
494 | { | |
495 | struct sock *sk; | |
496 | struct rose_sock *rose; | |
497 | ||
498 | if (sock->type != SOCK_SEQPACKET || protocol != 0) | |
499 | return -ESOCKTNOSUPPORT; | |
500 | ||
501 | if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL) | |
502 | return -ENOMEM; | |
503 | ||
504 | rose = rose_sk(sk); | |
505 | ||
506 | sock_init_data(sock, sk); | |
507 | ||
508 | skb_queue_head_init(&rose->ack_queue); | |
509 | #ifdef M_BIT | |
510 | skb_queue_head_init(&rose->frag_queue); | |
511 | rose->fraglen = 0; | |
512 | #endif | |
513 | ||
514 | sock->ops = &rose_proto_ops; | |
515 | sk->sk_protocol = protocol; | |
516 | ||
517 | init_timer(&rose->timer); | |
518 | init_timer(&rose->idletimer); | |
519 | ||
82e84249 RB |
520 | rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout); |
521 | rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout); | |
522 | rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout); | |
523 | rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout); | |
524 | rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout); | |
1da177e4 LT |
525 | |
526 | rose->state = ROSE_STATE_0; | |
527 | ||
528 | return 0; | |
529 | } | |
530 | ||
531 | static struct sock *rose_make_new(struct sock *osk) | |
532 | { | |
533 | struct sock *sk; | |
534 | struct rose_sock *rose, *orose; | |
535 | ||
536 | if (osk->sk_type != SOCK_SEQPACKET) | |
537 | return NULL; | |
538 | ||
539 | if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL) | |
540 | return NULL; | |
541 | ||
542 | rose = rose_sk(sk); | |
543 | ||
544 | sock_init_data(NULL, sk); | |
545 | ||
546 | skb_queue_head_init(&rose->ack_queue); | |
547 | #ifdef M_BIT | |
548 | skb_queue_head_init(&rose->frag_queue); | |
549 | rose->fraglen = 0; | |
550 | #endif | |
551 | ||
552 | sk->sk_type = osk->sk_type; | |
553 | sk->sk_socket = osk->sk_socket; | |
554 | sk->sk_priority = osk->sk_priority; | |
555 | sk->sk_protocol = osk->sk_protocol; | |
556 | sk->sk_rcvbuf = osk->sk_rcvbuf; | |
557 | sk->sk_sndbuf = osk->sk_sndbuf; | |
558 | sk->sk_state = TCP_ESTABLISHED; | |
559 | sk->sk_sleep = osk->sk_sleep; | |
53b924b3 | 560 | sock_copy_flags(sk, osk); |
1da177e4 LT |
561 | |
562 | init_timer(&rose->timer); | |
563 | init_timer(&rose->idletimer); | |
564 | ||
565 | orose = rose_sk(osk); | |
566 | rose->t1 = orose->t1; | |
567 | rose->t2 = orose->t2; | |
568 | rose->t3 = orose->t3; | |
569 | rose->hb = orose->hb; | |
570 | rose->idle = orose->idle; | |
571 | rose->defer = orose->defer; | |
572 | rose->device = orose->device; | |
573 | rose->qbitincl = orose->qbitincl; | |
574 | ||
575 | return sk; | |
576 | } | |
577 | ||
578 | static int rose_release(struct socket *sock) | |
579 | { | |
580 | struct sock *sk = sock->sk; | |
581 | struct rose_sock *rose; | |
582 | ||
583 | if (sk == NULL) return 0; | |
584 | ||
585 | rose = rose_sk(sk); | |
586 | ||
587 | switch (rose->state) { | |
588 | case ROSE_STATE_0: | |
589 | rose_disconnect(sk, 0, -1, -1); | |
590 | rose_destroy_socket(sk); | |
591 | break; | |
592 | ||
593 | case ROSE_STATE_2: | |
594 | rose->neighbour->use--; | |
595 | rose_disconnect(sk, 0, -1, -1); | |
596 | rose_destroy_socket(sk); | |
597 | break; | |
598 | ||
599 | case ROSE_STATE_1: | |
600 | case ROSE_STATE_3: | |
601 | case ROSE_STATE_4: | |
602 | case ROSE_STATE_5: | |
603 | rose_clear_queues(sk); | |
604 | rose_stop_idletimer(sk); | |
605 | rose_write_internal(sk, ROSE_CLEAR_REQUEST); | |
606 | rose_start_t3timer(sk); | |
607 | rose->state = ROSE_STATE_2; | |
608 | sk->sk_state = TCP_CLOSE; | |
609 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
610 | sk->sk_state_change(sk); | |
611 | sock_set_flag(sk, SOCK_DEAD); | |
612 | sock_set_flag(sk, SOCK_DESTROY); | |
613 | break; | |
614 | ||
615 | default: | |
616 | break; | |
617 | } | |
618 | ||
619 | sock->sk = NULL; | |
620 | ||
621 | return 0; | |
622 | } | |
623 | ||
624 | static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
625 | { | |
626 | struct sock *sk = sock->sk; | |
627 | struct rose_sock *rose = rose_sk(sk); | |
628 | struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; | |
629 | struct net_device *dev; | |
01d7dd0e RB |
630 | ax25_address *source; |
631 | ax25_uid_assoc *user; | |
1da177e4 LT |
632 | int n; |
633 | ||
634 | if (!sock_flag(sk, SOCK_ZAPPED)) | |
635 | return -EINVAL; | |
636 | ||
637 | if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) | |
638 | return -EINVAL; | |
639 | ||
640 | if (addr->srose_family != AF_ROSE) | |
641 | return -EINVAL; | |
642 | ||
643 | if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) | |
644 | return -EINVAL; | |
645 | ||
646 | if (addr->srose_ndigis > ROSE_MAX_DIGIS) | |
647 | return -EINVAL; | |
648 | ||
649 | if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) { | |
650 | SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n"); | |
651 | return -EADDRNOTAVAIL; | |
652 | } | |
653 | ||
654 | source = &addr->srose_call; | |
655 | ||
01d7dd0e RB |
656 | user = ax25_findbyuid(current->euid); |
657 | if (user) { | |
658 | rose->source_call = user->call; | |
659 | ax25_uid_put(user); | |
660 | } else { | |
1da177e4 LT |
661 | if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) |
662 | return -EACCES; | |
01d7dd0e | 663 | rose->source_call = *source; |
1da177e4 LT |
664 | } |
665 | ||
666 | rose->source_addr = addr->srose_addr; | |
1da177e4 LT |
667 | rose->device = dev; |
668 | rose->source_ndigis = addr->srose_ndigis; | |
669 | ||
670 | if (addr_len == sizeof(struct full_sockaddr_rose)) { | |
671 | struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; | |
672 | for (n = 0 ; n < addr->srose_ndigis ; n++) | |
673 | rose->source_digis[n] = full_addr->srose_digis[n]; | |
674 | } else { | |
675 | if (rose->source_ndigis == 1) { | |
676 | rose->source_digis[0] = addr->srose_digi; | |
677 | } | |
678 | } | |
679 | ||
680 | rose_insert_socket(sk); | |
681 | ||
682 | sock_reset_flag(sk, SOCK_ZAPPED); | |
683 | SOCK_DEBUG(sk, "ROSE: socket is bound\n"); | |
684 | return 0; | |
685 | } | |
686 | ||
687 | static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags) | |
688 | { | |
689 | struct sock *sk = sock->sk; | |
690 | struct rose_sock *rose = rose_sk(sk); | |
691 | struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; | |
692 | unsigned char cause, diagnostic; | |
1da177e4 | 693 | struct net_device *dev; |
01d7dd0e | 694 | ax25_uid_assoc *user; |
1da177e4 LT |
695 | int n; |
696 | ||
697 | if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { | |
698 | sock->state = SS_CONNECTED; | |
699 | return 0; /* Connect completed during a ERESTARTSYS event */ | |
700 | } | |
701 | ||
702 | if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { | |
703 | sock->state = SS_UNCONNECTED; | |
704 | return -ECONNREFUSED; | |
705 | } | |
706 | ||
707 | if (sk->sk_state == TCP_ESTABLISHED) | |
708 | return -EISCONN; /* No reconnect on a seqpacket socket */ | |
709 | ||
710 | sk->sk_state = TCP_CLOSE; | |
711 | sock->state = SS_UNCONNECTED; | |
712 | ||
713 | if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) | |
714 | return -EINVAL; | |
715 | ||
716 | if (addr->srose_family != AF_ROSE) | |
717 | return -EINVAL; | |
718 | ||
719 | if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) | |
720 | return -EINVAL; | |
721 | ||
722 | if (addr->srose_ndigis > ROSE_MAX_DIGIS) | |
723 | return -EINVAL; | |
724 | ||
725 | /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */ | |
726 | if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS) | |
727 | return -EINVAL; | |
728 | ||
729 | rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, | |
730 | &diagnostic); | |
731 | if (!rose->neighbour) | |
732 | return -ENETUNREACH; | |
733 | ||
734 | rose->lci = rose_new_lci(rose->neighbour); | |
735 | if (!rose->lci) | |
736 | return -ENETUNREACH; | |
737 | ||
738 | if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ | |
739 | sock_reset_flag(sk, SOCK_ZAPPED); | |
740 | ||
741 | if ((dev = rose_dev_first()) == NULL) | |
742 | return -ENETUNREACH; | |
743 | ||
01d7dd0e RB |
744 | user = ax25_findbyuid(current->euid); |
745 | if (!user) | |
1da177e4 LT |
746 | return -EINVAL; |
747 | ||
748 | memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN); | |
01d7dd0e | 749 | rose->source_call = user->call; |
1da177e4 | 750 | rose->device = dev; |
01d7dd0e | 751 | ax25_uid_put(user); |
1da177e4 LT |
752 | |
753 | rose_insert_socket(sk); /* Finish the bind */ | |
754 | } | |
d85838c5 | 755 | rose_try_next_neigh: |
1da177e4 LT |
756 | rose->dest_addr = addr->srose_addr; |
757 | rose->dest_call = addr->srose_call; | |
758 | rose->rand = ((long)rose & 0xFFFF) + rose->lci; | |
759 | rose->dest_ndigis = addr->srose_ndigis; | |
760 | ||
761 | if (addr_len == sizeof(struct full_sockaddr_rose)) { | |
762 | struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; | |
763 | for (n = 0 ; n < addr->srose_ndigis ; n++) | |
764 | rose->dest_digis[n] = full_addr->srose_digis[n]; | |
765 | } else { | |
766 | if (rose->dest_ndigis == 1) { | |
767 | rose->dest_digis[0] = addr->srose_digi; | |
768 | } | |
769 | } | |
770 | ||
771 | /* Move to connecting socket, start sending Connect Requests */ | |
772 | sock->state = SS_CONNECTING; | |
773 | sk->sk_state = TCP_SYN_SENT; | |
774 | ||
775 | rose->state = ROSE_STATE_1; | |
776 | ||
777 | rose->neighbour->use++; | |
778 | ||
779 | rose_write_internal(sk, ROSE_CALL_REQUEST); | |
780 | rose_start_heartbeat(sk); | |
781 | rose_start_t1timer(sk); | |
782 | ||
783 | /* Now the loop */ | |
784 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) | |
785 | return -EINPROGRESS; | |
786 | ||
787 | /* | |
788 | * A Connect Ack with Choke or timeout or failed routing will go to | |
789 | * closed. | |
790 | */ | |
791 | if (sk->sk_state == TCP_SYN_SENT) { | |
792 | struct task_struct *tsk = current; | |
793 | DECLARE_WAITQUEUE(wait, tsk); | |
794 | ||
795 | add_wait_queue(sk->sk_sleep, &wait); | |
796 | for (;;) { | |
797 | set_current_state(TASK_INTERRUPTIBLE); | |
798 | if (sk->sk_state != TCP_SYN_SENT) | |
799 | break; | |
800 | if (!signal_pending(tsk)) { | |
801 | schedule(); | |
802 | continue; | |
803 | } | |
804 | current->state = TASK_RUNNING; | |
805 | remove_wait_queue(sk->sk_sleep, &wait); | |
806 | return -ERESTARTSYS; | |
807 | } | |
808 | current->state = TASK_RUNNING; | |
809 | remove_wait_queue(sk->sk_sleep, &wait); | |
810 | } | |
811 | ||
812 | if (sk->sk_state != TCP_ESTABLISHED) { | |
d85838c5 RB |
813 | /* Try next neighbour */ |
814 | rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic); | |
815 | if (rose->neighbour) | |
816 | goto rose_try_next_neigh; | |
817 | /* No more neighbour */ | |
1da177e4 LT |
818 | sock->state = SS_UNCONNECTED; |
819 | return sock_error(sk); /* Always set at this point */ | |
820 | } | |
821 | ||
822 | sock->state = SS_CONNECTED; | |
823 | ||
824 | return 0; | |
825 | } | |
826 | ||
827 | static int rose_accept(struct socket *sock, struct socket *newsock, int flags) | |
828 | { | |
829 | struct task_struct *tsk = current; | |
830 | DECLARE_WAITQUEUE(wait, tsk); | |
831 | struct sk_buff *skb; | |
832 | struct sock *newsk; | |
833 | struct sock *sk; | |
834 | int err = 0; | |
835 | ||
836 | if ((sk = sock->sk) == NULL) | |
837 | return -EINVAL; | |
838 | ||
839 | lock_sock(sk); | |
840 | if (sk->sk_type != SOCK_SEQPACKET) { | |
841 | err = -EOPNOTSUPP; | |
842 | goto out; | |
843 | } | |
844 | ||
845 | if (sk->sk_state != TCP_LISTEN) { | |
846 | err = -EINVAL; | |
847 | goto out; | |
848 | } | |
849 | ||
850 | /* | |
851 | * The write queue this time is holding sockets ready to use | |
852 | * hooked into the SABM we saved | |
853 | */ | |
854 | add_wait_queue(sk->sk_sleep, &wait); | |
855 | for (;;) { | |
856 | skb = skb_dequeue(&sk->sk_receive_queue); | |
857 | if (skb) | |
858 | break; | |
859 | ||
860 | current->state = TASK_INTERRUPTIBLE; | |
861 | release_sock(sk); | |
862 | if (flags & O_NONBLOCK) { | |
863 | current->state = TASK_RUNNING; | |
864 | remove_wait_queue(sk->sk_sleep, &wait); | |
865 | return -EWOULDBLOCK; | |
866 | } | |
867 | if (!signal_pending(tsk)) { | |
868 | schedule(); | |
869 | lock_sock(sk); | |
870 | continue; | |
871 | } | |
872 | return -ERESTARTSYS; | |
873 | } | |
874 | current->state = TASK_RUNNING; | |
875 | remove_wait_queue(sk->sk_sleep, &wait); | |
876 | ||
877 | newsk = skb->sk; | |
878 | newsk->sk_socket = newsock; | |
879 | newsk->sk_sleep = &newsock->wait; | |
880 | ||
881 | /* Now attach up the new socket */ | |
882 | skb->sk = NULL; | |
883 | kfree_skb(skb); | |
884 | sk->sk_ack_backlog--; | |
885 | newsock->sk = newsk; | |
886 | ||
887 | out: | |
888 | release_sock(sk); | |
889 | ||
890 | return err; | |
891 | } | |
892 | ||
893 | static int rose_getname(struct socket *sock, struct sockaddr *uaddr, | |
894 | int *uaddr_len, int peer) | |
895 | { | |
896 | struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr; | |
897 | struct sock *sk = sock->sk; | |
898 | struct rose_sock *rose = rose_sk(sk); | |
899 | int n; | |
900 | ||
901 | if (peer != 0) { | |
902 | if (sk->sk_state != TCP_ESTABLISHED) | |
903 | return -ENOTCONN; | |
904 | srose->srose_family = AF_ROSE; | |
905 | srose->srose_addr = rose->dest_addr; | |
906 | srose->srose_call = rose->dest_call; | |
907 | srose->srose_ndigis = rose->dest_ndigis; | |
908 | for (n = 0; n < rose->dest_ndigis; n++) | |
909 | srose->srose_digis[n] = rose->dest_digis[n]; | |
910 | } else { | |
911 | srose->srose_family = AF_ROSE; | |
912 | srose->srose_addr = rose->source_addr; | |
913 | srose->srose_call = rose->source_call; | |
914 | srose->srose_ndigis = rose->source_ndigis; | |
915 | for (n = 0; n < rose->source_ndigis; n++) | |
916 | srose->srose_digis[n] = rose->source_digis[n]; | |
917 | } | |
918 | ||
919 | *uaddr_len = sizeof(struct full_sockaddr_rose); | |
920 | return 0; | |
921 | } | |
922 | ||
923 | int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci) | |
924 | { | |
925 | struct sock *sk; | |
926 | struct sock *make; | |
927 | struct rose_sock *make_rose; | |
928 | struct rose_facilities_struct facilities; | |
929 | int n, len; | |
930 | ||
931 | skb->sk = NULL; /* Initially we don't know who it's for */ | |
932 | ||
933 | /* | |
934 | * skb->data points to the rose frame start | |
935 | */ | |
936 | memset(&facilities, 0x00, sizeof(struct rose_facilities_struct)); | |
937 | ||
938 | len = (((skb->data[3] >> 4) & 0x0F) + 1) / 2; | |
939 | len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2; | |
940 | if (!rose_parse_facilities(skb->data + len + 4, &facilities)) { | |
941 | rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76); | |
942 | return 0; | |
943 | } | |
944 | ||
945 | sk = rose_find_listener(&facilities.source_addr, &facilities.source_call); | |
946 | ||
947 | /* | |
948 | * We can't accept the Call Request. | |
949 | */ | |
950 | if (sk == NULL || sk_acceptq_is_full(sk) || | |
951 | (make = rose_make_new(sk)) == NULL) { | |
952 | rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120); | |
953 | return 0; | |
954 | } | |
955 | ||
956 | skb->sk = make; | |
957 | make->sk_state = TCP_ESTABLISHED; | |
958 | make_rose = rose_sk(make); | |
959 | ||
960 | make_rose->lci = lci; | |
961 | make_rose->dest_addr = facilities.dest_addr; | |
962 | make_rose->dest_call = facilities.dest_call; | |
963 | make_rose->dest_ndigis = facilities.dest_ndigis; | |
964 | for (n = 0 ; n < facilities.dest_ndigis ; n++) | |
965 | make_rose->dest_digis[n] = facilities.dest_digis[n]; | |
966 | make_rose->source_addr = facilities.source_addr; | |
967 | make_rose->source_call = facilities.source_call; | |
968 | make_rose->source_ndigis = facilities.source_ndigis; | |
969 | for (n = 0 ; n < facilities.source_ndigis ; n++) | |
970 | make_rose->source_digis[n]= facilities.source_digis[n]; | |
971 | make_rose->neighbour = neigh; | |
972 | make_rose->device = dev; | |
973 | make_rose->facilities = facilities; | |
974 | ||
975 | make_rose->neighbour->use++; | |
976 | ||
977 | if (rose_sk(sk)->defer) { | |
978 | make_rose->state = ROSE_STATE_5; | |
979 | } else { | |
980 | rose_write_internal(make, ROSE_CALL_ACCEPTED); | |
981 | make_rose->state = ROSE_STATE_3; | |
982 | rose_start_idletimer(make); | |
983 | } | |
984 | ||
985 | make_rose->condition = 0x00; | |
986 | make_rose->vs = 0; | |
987 | make_rose->va = 0; | |
988 | make_rose->vr = 0; | |
989 | make_rose->vl = 0; | |
990 | sk->sk_ack_backlog++; | |
991 | ||
992 | rose_insert_socket(make); | |
993 | ||
994 | skb_queue_head(&sk->sk_receive_queue, skb); | |
995 | ||
996 | rose_start_heartbeat(make); | |
997 | ||
998 | if (!sock_flag(sk, SOCK_DEAD)) | |
999 | sk->sk_data_ready(sk, skb->len); | |
1000 | ||
1001 | return 1; | |
1002 | } | |
1003 | ||
1004 | static int rose_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1005 | struct msghdr *msg, size_t len) | |
1006 | { | |
1007 | struct sock *sk = sock->sk; | |
1008 | struct rose_sock *rose = rose_sk(sk); | |
1009 | struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name; | |
1010 | int err; | |
1011 | struct full_sockaddr_rose srose; | |
1012 | struct sk_buff *skb; | |
1013 | unsigned char *asmptr; | |
1014 | int n, size, qbit = 0; | |
1015 | ||
1016 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) | |
1017 | return -EINVAL; | |
1018 | ||
1019 | if (sock_flag(sk, SOCK_ZAPPED)) | |
1020 | return -EADDRNOTAVAIL; | |
1021 | ||
1022 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1023 | send_sig(SIGPIPE, current, 0); | |
1024 | return -EPIPE; | |
1025 | } | |
1026 | ||
1027 | if (rose->neighbour == NULL || rose->device == NULL) | |
1028 | return -ENETUNREACH; | |
1029 | ||
1030 | if (usrose != NULL) { | |
1031 | if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose)) | |
1032 | return -EINVAL; | |
1033 | memset(&srose, 0, sizeof(struct full_sockaddr_rose)); | |
1034 | memcpy(&srose, usrose, msg->msg_namelen); | |
1035 | if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 || | |
1036 | ax25cmp(&rose->dest_call, &srose.srose_call) != 0) | |
1037 | return -EISCONN; | |
1038 | if (srose.srose_ndigis != rose->dest_ndigis) | |
1039 | return -EISCONN; | |
1040 | if (srose.srose_ndigis == rose->dest_ndigis) { | |
1041 | for (n = 0 ; n < srose.srose_ndigis ; n++) | |
1042 | if (ax25cmp(&rose->dest_digis[n], | |
1043 | &srose.srose_digis[n])) | |
1044 | return -EISCONN; | |
1045 | } | |
1046 | if (srose.srose_family != AF_ROSE) | |
1047 | return -EINVAL; | |
1048 | } else { | |
1049 | if (sk->sk_state != TCP_ESTABLISHED) | |
1050 | return -ENOTCONN; | |
1051 | ||
1052 | srose.srose_family = AF_ROSE; | |
1053 | srose.srose_addr = rose->dest_addr; | |
1054 | srose.srose_call = rose->dest_call; | |
1055 | srose.srose_ndigis = rose->dest_ndigis; | |
1056 | for (n = 0 ; n < rose->dest_ndigis ; n++) | |
1057 | srose.srose_digis[n] = rose->dest_digis[n]; | |
1058 | } | |
1059 | ||
1060 | SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n"); | |
1061 | ||
1062 | /* Build a packet */ | |
1063 | SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n"); | |
1064 | size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN; | |
1065 | ||
1066 | if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) | |
1067 | return err; | |
1068 | ||
1069 | skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN); | |
1070 | ||
1071 | /* | |
1072 | * Put the data on the end | |
1073 | */ | |
1074 | SOCK_DEBUG(sk, "ROSE: Appending user data\n"); | |
1075 | ||
1076 | asmptr = skb->h.raw = skb_put(skb, len); | |
1077 | ||
1078 | err = memcpy_fromiovec(asmptr, msg->msg_iov, len); | |
1079 | if (err) { | |
1080 | kfree_skb(skb); | |
1081 | return err; | |
1082 | } | |
1083 | ||
1084 | /* | |
1085 | * If the Q BIT Include socket option is in force, the first | |
1086 | * byte of the user data is the logical value of the Q Bit. | |
1087 | */ | |
1088 | if (rose->qbitincl) { | |
1089 | qbit = skb->data[0]; | |
1090 | skb_pull(skb, 1); | |
1091 | } | |
1092 | ||
1093 | /* | |
1094 | * Push down the ROSE header | |
1095 | */ | |
1096 | asmptr = skb_push(skb, ROSE_MIN_LEN); | |
1097 | ||
1098 | SOCK_DEBUG(sk, "ROSE: Building Network Header.\n"); | |
1099 | ||
1100 | /* Build a ROSE Network header */ | |
1101 | asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI; | |
1102 | asmptr[1] = (rose->lci >> 0) & 0xFF; | |
1103 | asmptr[2] = ROSE_DATA; | |
1104 | ||
1105 | if (qbit) | |
1106 | asmptr[0] |= ROSE_Q_BIT; | |
1107 | ||
1108 | SOCK_DEBUG(sk, "ROSE: Built header.\n"); | |
1109 | ||
1110 | SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n"); | |
1111 | ||
1112 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1113 | kfree_skb(skb); | |
1114 | return -ENOTCONN; | |
1115 | } | |
1116 | ||
1117 | #ifdef M_BIT | |
1118 | #define ROSE_PACLEN (256-ROSE_MIN_LEN) | |
1119 | if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) { | |
1120 | unsigned char header[ROSE_MIN_LEN]; | |
1121 | struct sk_buff *skbn; | |
1122 | int frontlen; | |
1123 | int lg; | |
1124 | ||
1125 | /* Save a copy of the Header */ | |
1126 | memcpy(header, skb->data, ROSE_MIN_LEN); | |
1127 | skb_pull(skb, ROSE_MIN_LEN); | |
1128 | ||
1129 | frontlen = skb_headroom(skb); | |
1130 | ||
1131 | while (skb->len > 0) { | |
1132 | if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) { | |
1133 | kfree_skb(skb); | |
1134 | return err; | |
1135 | } | |
1136 | ||
1137 | skbn->sk = sk; | |
1138 | skbn->free = 1; | |
1139 | skbn->arp = 1; | |
1140 | ||
1141 | skb_reserve(skbn, frontlen); | |
1142 | ||
1143 | lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN; | |
1144 | ||
1145 | /* Copy the user data */ | |
1146 | memcpy(skb_put(skbn, lg), skb->data, lg); | |
1147 | skb_pull(skb, lg); | |
1148 | ||
1149 | /* Duplicate the Header */ | |
1150 | skb_push(skbn, ROSE_MIN_LEN); | |
1151 | memcpy(skbn->data, header, ROSE_MIN_LEN); | |
1152 | ||
1153 | if (skb->len > 0) | |
1154 | skbn->data[2] |= M_BIT; | |
1155 | ||
1156 | skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */ | |
1157 | } | |
1158 | ||
1159 | skb->free = 1; | |
1160 | kfree_skb(skb); | |
1161 | } else { | |
1162 | skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */ | |
1163 | } | |
1164 | #else | |
1165 | skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */ | |
1166 | #endif | |
1167 | ||
1168 | rose_kick(sk); | |
1169 | ||
1170 | return len; | |
1171 | } | |
1172 | ||
1173 | ||
1174 | static int rose_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1175 | struct msghdr *msg, size_t size, int flags) | |
1176 | { | |
1177 | struct sock *sk = sock->sk; | |
1178 | struct rose_sock *rose = rose_sk(sk); | |
1179 | struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name; | |
1180 | size_t copied; | |
1181 | unsigned char *asmptr; | |
1182 | struct sk_buff *skb; | |
1183 | int n, er, qbit; | |
1184 | ||
1185 | /* | |
1186 | * This works for seqpacket too. The receiver has ordered the queue for | |
1187 | * us! We do one quick check first though | |
1188 | */ | |
1189 | if (sk->sk_state != TCP_ESTABLISHED) | |
1190 | return -ENOTCONN; | |
1191 | ||
1192 | /* Now we can treat all alike */ | |
1193 | if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) | |
1194 | return er; | |
1195 | ||
1196 | qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT; | |
1197 | ||
1198 | skb_pull(skb, ROSE_MIN_LEN); | |
1199 | ||
1200 | if (rose->qbitincl) { | |
1201 | asmptr = skb_push(skb, 1); | |
1202 | *asmptr = qbit; | |
1203 | } | |
1204 | ||
1205 | skb->h.raw = skb->data; | |
1206 | copied = skb->len; | |
1207 | ||
1208 | if (copied > size) { | |
1209 | copied = size; | |
1210 | msg->msg_flags |= MSG_TRUNC; | |
1211 | } | |
1212 | ||
1213 | skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
1214 | ||
1215 | if (srose != NULL) { | |
1216 | srose->srose_family = AF_ROSE; | |
1217 | srose->srose_addr = rose->dest_addr; | |
1218 | srose->srose_call = rose->dest_call; | |
1219 | srose->srose_ndigis = rose->dest_ndigis; | |
1220 | if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) { | |
1221 | struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name; | |
1222 | for (n = 0 ; n < rose->dest_ndigis ; n++) | |
1223 | full_srose->srose_digis[n] = rose->dest_digis[n]; | |
1224 | msg->msg_namelen = sizeof(struct full_sockaddr_rose); | |
1225 | } else { | |
1226 | if (rose->dest_ndigis >= 1) { | |
1227 | srose->srose_ndigis = 1; | |
1228 | srose->srose_digi = rose->dest_digis[0]; | |
1229 | } | |
1230 | msg->msg_namelen = sizeof(struct sockaddr_rose); | |
1231 | } | |
1232 | } | |
1233 | ||
1234 | skb_free_datagram(sk, skb); | |
1235 | ||
1236 | return copied; | |
1237 | } | |
1238 | ||
1239 | ||
1240 | static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1241 | { | |
1242 | struct sock *sk = sock->sk; | |
1243 | struct rose_sock *rose = rose_sk(sk); | |
1244 | void __user *argp = (void __user *)arg; | |
1245 | ||
1246 | switch (cmd) { | |
1247 | case TIOCOUTQ: { | |
1248 | long amount; | |
1249 | amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); | |
1250 | if (amount < 0) | |
1251 | amount = 0; | |
20b7d10a | 1252 | return put_user(amount, (unsigned int __user *) argp); |
1da177e4 LT |
1253 | } |
1254 | ||
1255 | case TIOCINQ: { | |
1256 | struct sk_buff *skb; | |
1257 | long amount = 0L; | |
1258 | /* These two are safe on a single CPU system as only user tasks fiddle here */ | |
1259 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) | |
1260 | amount = skb->len; | |
20b7d10a | 1261 | return put_user(amount, (unsigned int __user *) argp); |
1da177e4 LT |
1262 | } |
1263 | ||
1264 | case SIOCGSTAMP: | |
20b7d10a | 1265 | return sock_get_timestamp(sk, (struct timeval __user *) argp); |
1da177e4 LT |
1266 | |
1267 | case SIOCGIFADDR: | |
1268 | case SIOCSIFADDR: | |
1269 | case SIOCGIFDSTADDR: | |
1270 | case SIOCSIFDSTADDR: | |
1271 | case SIOCGIFBRDADDR: | |
1272 | case SIOCSIFBRDADDR: | |
1273 | case SIOCGIFNETMASK: | |
1274 | case SIOCSIFNETMASK: | |
1275 | case SIOCGIFMETRIC: | |
1276 | case SIOCSIFMETRIC: | |
1277 | return -EINVAL; | |
1278 | ||
1279 | case SIOCADDRT: | |
1280 | case SIOCDELRT: | |
1281 | case SIOCRSCLRRT: | |
1282 | if (!capable(CAP_NET_ADMIN)) | |
1283 | return -EPERM; | |
1284 | return rose_rt_ioctl(cmd, argp); | |
1285 | ||
1286 | case SIOCRSGCAUSE: { | |
1287 | struct rose_cause_struct rose_cause; | |
1288 | rose_cause.cause = rose->cause; | |
1289 | rose_cause.diagnostic = rose->diagnostic; | |
1290 | return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0; | |
1291 | } | |
1292 | ||
1293 | case SIOCRSSCAUSE: { | |
1294 | struct rose_cause_struct rose_cause; | |
1295 | if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct))) | |
1296 | return -EFAULT; | |
1297 | rose->cause = rose_cause.cause; | |
1298 | rose->diagnostic = rose_cause.diagnostic; | |
1299 | return 0; | |
1300 | } | |
1301 | ||
1302 | case SIOCRSSL2CALL: | |
1303 | if (!capable(CAP_NET_ADMIN)) return -EPERM; | |
1304 | if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) | |
1305 | ax25_listen_release(&rose_callsign, NULL); | |
1306 | if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address))) | |
1307 | return -EFAULT; | |
1308 | if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) | |
1309 | ax25_listen_register(&rose_callsign, NULL); | |
1310 | return 0; | |
1311 | ||
1312 | case SIOCRSGL2CALL: | |
1313 | return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0; | |
1314 | ||
1315 | case SIOCRSACCEPT: | |
1316 | if (rose->state == ROSE_STATE_5) { | |
1317 | rose_write_internal(sk, ROSE_CALL_ACCEPTED); | |
1318 | rose_start_idletimer(sk); | |
1319 | rose->condition = 0x00; | |
1320 | rose->vs = 0; | |
1321 | rose->va = 0; | |
1322 | rose->vr = 0; | |
1323 | rose->vl = 0; | |
1324 | rose->state = ROSE_STATE_3; | |
1325 | } | |
1326 | return 0; | |
1327 | ||
1328 | default: | |
b5e5fa5e | 1329 | return -ENOIOCTLCMD; |
1da177e4 LT |
1330 | } |
1331 | ||
1332 | return 0; | |
1333 | } | |
1334 | ||
1335 | #ifdef CONFIG_PROC_FS | |
1336 | static void *rose_info_start(struct seq_file *seq, loff_t *pos) | |
1337 | { | |
1338 | int i; | |
1339 | struct sock *s; | |
1340 | struct hlist_node *node; | |
1341 | ||
1342 | spin_lock_bh(&rose_list_lock); | |
1343 | if (*pos == 0) | |
1344 | return SEQ_START_TOKEN; | |
1345 | ||
1346 | i = 1; | |
1347 | sk_for_each(s, node, &rose_list) { | |
1348 | if (i == *pos) | |
1349 | return s; | |
1350 | ++i; | |
1351 | } | |
1352 | return NULL; | |
1353 | } | |
1354 | ||
1355 | static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos) | |
1356 | { | |
1357 | ++*pos; | |
1358 | ||
1359 | return (v == SEQ_START_TOKEN) ? sk_head(&rose_list) | |
1360 | : sk_next((struct sock *)v); | |
1361 | } | |
1362 | ||
1363 | static void rose_info_stop(struct seq_file *seq, void *v) | |
1364 | { | |
1365 | spin_unlock_bh(&rose_list_lock); | |
1366 | } | |
1367 | ||
1368 | static int rose_info_show(struct seq_file *seq, void *v) | |
1369 | { | |
f75268cd RB |
1370 | char buf[11]; |
1371 | ||
1da177e4 LT |
1372 | if (v == SEQ_START_TOKEN) |
1373 | seq_puts(seq, | |
1374 | "dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode\n"); | |
1375 | ||
1376 | else { | |
1377 | struct sock *s = v; | |
1378 | struct rose_sock *rose = rose_sk(s); | |
1379 | const char *devname, *callsign; | |
1380 | const struct net_device *dev = rose->device; | |
1381 | ||
1382 | if (!dev) | |
1383 | devname = "???"; | |
1384 | else | |
1385 | devname = dev->name; | |
1386 | ||
1387 | seq_printf(seq, "%-10s %-9s ", | |
1388 | rose2asc(&rose->dest_addr), | |
f75268cd | 1389 | ax2asc(buf, &rose->dest_call)); |
1da177e4 LT |
1390 | |
1391 | if (ax25cmp(&rose->source_call, &null_ax25_address) == 0) | |
1392 | callsign = "??????-?"; | |
1393 | else | |
f75268cd | 1394 | callsign = ax2asc(buf, &rose->source_call); |
1da177e4 LT |
1395 | |
1396 | seq_printf(seq, | |
1397 | "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n", | |
1398 | rose2asc(&rose->source_addr), | |
1399 | callsign, | |
1400 | devname, | |
1401 | rose->lci & 0x0FFF, | |
1402 | (rose->neighbour) ? rose->neighbour->number : 0, | |
1403 | rose->state, | |
1404 | rose->vs, | |
1405 | rose->vr, | |
1406 | rose->va, | |
1407 | ax25_display_timer(&rose->timer) / HZ, | |
1408 | rose->t1 / HZ, | |
1409 | rose->t2 / HZ, | |
1410 | rose->t3 / HZ, | |
1411 | rose->hb / HZ, | |
1412 | ax25_display_timer(&rose->idletimer) / (60 * HZ), | |
1413 | rose->idle / (60 * HZ), | |
1414 | atomic_read(&s->sk_wmem_alloc), | |
1415 | atomic_read(&s->sk_rmem_alloc), | |
1416 | s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); | |
1417 | } | |
1418 | ||
1419 | return 0; | |
1420 | } | |
1421 | ||
1422 | static struct seq_operations rose_info_seqops = { | |
1423 | .start = rose_info_start, | |
1424 | .next = rose_info_next, | |
1425 | .stop = rose_info_stop, | |
1426 | .show = rose_info_show, | |
1427 | }; | |
1428 | ||
1429 | static int rose_info_open(struct inode *inode, struct file *file) | |
1430 | { | |
1431 | return seq_open(file, &rose_info_seqops); | |
1432 | } | |
1433 | ||
1434 | static struct file_operations rose_info_fops = { | |
1435 | .owner = THIS_MODULE, | |
1436 | .open = rose_info_open, | |
1437 | .read = seq_read, | |
1438 | .llseek = seq_lseek, | |
1439 | .release = seq_release, | |
1440 | }; | |
1441 | #endif /* CONFIG_PROC_FS */ | |
1442 | ||
1443 | static struct net_proto_family rose_family_ops = { | |
1444 | .family = PF_ROSE, | |
1445 | .create = rose_create, | |
1446 | .owner = THIS_MODULE, | |
1447 | }; | |
1448 | ||
1449 | static struct proto_ops rose_proto_ops = { | |
1450 | .family = PF_ROSE, | |
1451 | .owner = THIS_MODULE, | |
1452 | .release = rose_release, | |
1453 | .bind = rose_bind, | |
1454 | .connect = rose_connect, | |
1455 | .socketpair = sock_no_socketpair, | |
1456 | .accept = rose_accept, | |
1457 | .getname = rose_getname, | |
1458 | .poll = datagram_poll, | |
1459 | .ioctl = rose_ioctl, | |
1460 | .listen = rose_listen, | |
1461 | .shutdown = sock_no_shutdown, | |
1462 | .setsockopt = rose_setsockopt, | |
1463 | .getsockopt = rose_getsockopt, | |
1464 | .sendmsg = rose_sendmsg, | |
1465 | .recvmsg = rose_recvmsg, | |
1466 | .mmap = sock_no_mmap, | |
1467 | .sendpage = sock_no_sendpage, | |
1468 | }; | |
1469 | ||
1470 | static struct notifier_block rose_dev_notifier = { | |
1471 | .notifier_call = rose_device_event, | |
1472 | }; | |
1473 | ||
1474 | static struct net_device **dev_rose; | |
1475 | ||
1da177e4 LT |
1476 | static int __init rose_proto_init(void) |
1477 | { | |
1478 | int i; | |
a83cd2cc | 1479 | int rc; |
1da177e4 | 1480 | |
a83cd2cc AD |
1481 | if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) { |
1482 | printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n"); | |
1483 | rc = -EINVAL; | |
1484 | goto out; | |
1485 | } | |
1486 | ||
1487 | rc = proto_register(&rose_proto, 0); | |
1da177e4 LT |
1488 | if (rc != 0) |
1489 | goto out; | |
1490 | ||
1491 | rose_callsign = null_ax25_address; | |
1492 | ||
1b30dd35 | 1493 | dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL); |
1da177e4 LT |
1494 | if (dev_rose == NULL) { |
1495 | printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n"); | |
a83cd2cc AD |
1496 | rc = -ENOMEM; |
1497 | goto out_proto_unregister; | |
1da177e4 LT |
1498 | } |
1499 | ||
1da177e4 LT |
1500 | for (i = 0; i < rose_ndevs; i++) { |
1501 | struct net_device *dev; | |
1502 | char name[IFNAMSIZ]; | |
1503 | ||
1504 | sprintf(name, "rose%d", i); | |
1505 | dev = alloc_netdev(sizeof(struct net_device_stats), | |
1506 | name, rose_setup); | |
1507 | if (!dev) { | |
1508 | printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n"); | |
70ff3b66 | 1509 | rc = -ENOMEM; |
1da177e4 LT |
1510 | goto fail; |
1511 | } | |
70ff3b66 AD |
1512 | rc = register_netdev(dev); |
1513 | if (rc) { | |
520d1b83 | 1514 | printk(KERN_ERR "ROSE: netdevice registration failed\n"); |
1da177e4 LT |
1515 | free_netdev(dev); |
1516 | goto fail; | |
1517 | } | |
1518 | dev_rose[i] = dev; | |
1519 | } | |
1520 | ||
1521 | sock_register(&rose_family_ops); | |
1522 | register_netdevice_notifier(&rose_dev_notifier); | |
1da177e4 LT |
1523 | |
1524 | ax25_protocol_register(AX25_P_ROSE, rose_route_frame); | |
1525 | ax25_linkfail_register(rose_link_failed); | |
1526 | ||
1527 | #ifdef CONFIG_SYSCTL | |
1528 | rose_register_sysctl(); | |
1529 | #endif | |
1530 | rose_loopback_init(); | |
1531 | ||
1532 | rose_add_loopback_neigh(); | |
1533 | ||
1534 | proc_net_fops_create("rose", S_IRUGO, &rose_info_fops); | |
1535 | proc_net_fops_create("rose_neigh", S_IRUGO, &rose_neigh_fops); | |
1536 | proc_net_fops_create("rose_nodes", S_IRUGO, &rose_nodes_fops); | |
1537 | proc_net_fops_create("rose_routes", S_IRUGO, &rose_routes_fops); | |
1538 | out: | |
1539 | return rc; | |
1540 | fail: | |
1541 | while (--i >= 0) { | |
1542 | unregister_netdev(dev_rose[i]); | |
1543 | free_netdev(dev_rose[i]); | |
1544 | } | |
1545 | kfree(dev_rose); | |
a83cd2cc | 1546 | out_proto_unregister: |
1da177e4 | 1547 | proto_unregister(&rose_proto); |
70ff3b66 | 1548 | goto out; |
1da177e4 LT |
1549 | } |
1550 | module_init(rose_proto_init); | |
1551 | ||
1552 | module_param(rose_ndevs, int, 0); | |
1553 | MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices"); | |
1554 | ||
1555 | MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); | |
1556 | MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol"); | |
1557 | MODULE_LICENSE("GPL"); | |
1558 | MODULE_ALIAS_NETPROTO(PF_ROSE); | |
1559 | ||
1560 | static void __exit rose_exit(void) | |
1561 | { | |
1562 | int i; | |
1563 | ||
1564 | proc_net_remove("rose"); | |
1565 | proc_net_remove("rose_neigh"); | |
1566 | proc_net_remove("rose_nodes"); | |
1567 | proc_net_remove("rose_routes"); | |
1568 | rose_loopback_clear(); | |
1569 | ||
1570 | rose_rt_free(); | |
1571 | ||
1572 | ax25_protocol_release(AX25_P_ROSE); | |
1573 | ax25_linkfail_release(rose_link_failed); | |
1574 | ||
1575 | if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) | |
1576 | ax25_listen_release(&rose_callsign, NULL); | |
1577 | ||
1578 | #ifdef CONFIG_SYSCTL | |
1579 | rose_unregister_sysctl(); | |
1580 | #endif | |
1581 | unregister_netdevice_notifier(&rose_dev_notifier); | |
1582 | ||
1583 | sock_unregister(PF_ROSE); | |
1584 | ||
1585 | for (i = 0; i < rose_ndevs; i++) { | |
1586 | struct net_device *dev = dev_rose[i]; | |
1587 | ||
1588 | if (dev) { | |
1589 | unregister_netdev(dev); | |
1590 | free_netdev(dev); | |
1591 | } | |
1592 | } | |
1593 | ||
1594 | kfree(dev_rose); | |
1595 | proto_unregister(&rose_proto); | |
1596 | } | |
1597 | ||
1598 | module_exit(rose_exit); |