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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 | |
1da177e4 | 13 | #include <linux/config.h> |
4fc268d2 | 14 | #include <linux/capability.h> |
1da177e4 LT |
15 | #include <linux/module.h> |
16 | #include <linux/moduleparam.h> | |
17 | #include <linux/init.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/spinlock.h> | |
25 | #include <linux/timer.h> | |
26 | #include <linux/string.h> | |
27 | #include <linux/sockios.h> | |
28 | #include <linux/net.h> | |
29 | #include <linux/stat.h> | |
30 | #include <net/ax25.h> | |
31 | #include <linux/inet.h> | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/if_arp.h> | |
34 | #include <linux/skbuff.h> | |
35 | #include <net/sock.h> | |
36 | #include <asm/system.h> | |
37 | #include <asm/uaccess.h> | |
38 | #include <linux/fcntl.h> | |
39 | #include <linux/termios.h> | |
40 | #include <linux/mm.h> | |
41 | #include <linux/interrupt.h> | |
42 | #include <linux/notifier.h> | |
43 | #include <net/rose.h> | |
44 | #include <linux/proc_fs.h> | |
45 | #include <linux/seq_file.h> | |
c752f073 | 46 | #include <net/tcp_states.h> |
1da177e4 LT |
47 | #include <net/ip.h> |
48 | #include <net/arp.h> | |
49 | ||
50 | static int rose_ndevs = 10; | |
51 | ||
52 | int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0; | |
53 | int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1; | |
54 | int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2; | |
55 | int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3; | |
56 | int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE; | |
57 | int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB; | |
58 | int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING; | |
59 | int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT; | |
60 | int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC; | |
61 | int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE; | |
62 | ||
63 | static HLIST_HEAD(rose_list); | |
64 | static DEFINE_SPINLOCK(rose_list_lock); | |
65 | ||
66 | static struct proto_ops rose_proto_ops; | |
67 | ||
68 | ax25_address rose_callsign; | |
69 | ||
70 | /* | |
71 | * Convert a ROSE address into text. | |
72 | */ | |
73 | const char *rose2asc(const rose_address *addr) | |
74 | { | |
75 | static char buffer[11]; | |
76 | ||
77 | if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 && | |
78 | addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 && | |
79 | addr->rose_addr[4] == 0x00) { | |
80 | strcpy(buffer, "*"); | |
81 | } else { | |
82 | sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF, | |
83 | addr->rose_addr[1] & 0xFF, | |
84 | addr->rose_addr[2] & 0xFF, | |
85 | addr->rose_addr[3] & 0xFF, | |
86 | addr->rose_addr[4] & 0xFF); | |
87 | } | |
88 | ||
89 | return buffer; | |
90 | } | |
91 | ||
92 | /* | |
93 | * Compare two ROSE addresses, 0 == equal. | |
94 | */ | |
95 | int rosecmp(rose_address *addr1, rose_address *addr2) | |
96 | { | |
97 | int i; | |
98 | ||
99 | for (i = 0; i < 5; i++) | |
100 | if (addr1->rose_addr[i] != addr2->rose_addr[i]) | |
101 | return 1; | |
102 | ||
103 | return 0; | |
104 | } | |
105 | ||
106 | /* | |
107 | * Compare two ROSE addresses for only mask digits, 0 == equal. | |
108 | */ | |
109 | int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask) | |
110 | { | |
111 | int i, j; | |
112 | ||
113 | if (mask > 10) | |
114 | return 1; | |
115 | ||
116 | for (i = 0; i < mask; i++) { | |
117 | j = i / 2; | |
118 | ||
119 | if ((i % 2) != 0) { | |
120 | if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F)) | |
121 | return 1; | |
122 | } else { | |
123 | if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0)) | |
124 | return 1; | |
125 | } | |
126 | } | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
131 | /* | |
132 | * Socket removal during an interrupt is now safe. | |
133 | */ | |
134 | static void rose_remove_socket(struct sock *sk) | |
135 | { | |
136 | spin_lock_bh(&rose_list_lock); | |
137 | sk_del_node_init(sk); | |
138 | spin_unlock_bh(&rose_list_lock); | |
139 | } | |
140 | ||
141 | /* | |
142 | * Kill all bound sockets on a broken link layer connection to a | |
143 | * particular neighbour. | |
144 | */ | |
145 | void rose_kill_by_neigh(struct rose_neigh *neigh) | |
146 | { | |
147 | struct sock *s; | |
148 | struct hlist_node *node; | |
149 | ||
150 | spin_lock_bh(&rose_list_lock); | |
151 | sk_for_each(s, node, &rose_list) { | |
152 | struct rose_sock *rose = rose_sk(s); | |
153 | ||
154 | if (rose->neighbour == neigh) { | |
155 | rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); | |
156 | rose->neighbour->use--; | |
157 | rose->neighbour = NULL; | |
158 | } | |
159 | } | |
160 | spin_unlock_bh(&rose_list_lock); | |
161 | } | |
162 | ||
163 | /* | |
164 | * Kill all bound sockets on a dropped device. | |
165 | */ | |
166 | static void rose_kill_by_device(struct net_device *dev) | |
167 | { | |
168 | struct sock *s; | |
169 | struct hlist_node *node; | |
170 | ||
171 | spin_lock_bh(&rose_list_lock); | |
172 | sk_for_each(s, node, &rose_list) { | |
173 | struct rose_sock *rose = rose_sk(s); | |
174 | ||
175 | if (rose->device == dev) { | |
176 | rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); | |
177 | rose->neighbour->use--; | |
178 | rose->device = NULL; | |
179 | } | |
180 | } | |
181 | spin_unlock_bh(&rose_list_lock); | |
182 | } | |
183 | ||
184 | /* | |
185 | * Handle device status changes. | |
186 | */ | |
187 | static int rose_device_event(struct notifier_block *this, unsigned long event, | |
188 | void *ptr) | |
189 | { | |
190 | struct net_device *dev = (struct net_device *)ptr; | |
191 | ||
192 | if (event != NETDEV_DOWN) | |
193 | return NOTIFY_DONE; | |
194 | ||
195 | switch (dev->type) { | |
196 | case ARPHRD_ROSE: | |
197 | rose_kill_by_device(dev); | |
198 | break; | |
199 | case ARPHRD_AX25: | |
200 | rose_link_device_down(dev); | |
201 | rose_rt_device_down(dev); | |
202 | break; | |
203 | } | |
204 | ||
205 | return NOTIFY_DONE; | |
206 | } | |
207 | ||
208 | /* | |
209 | * Add a socket to the bound sockets list. | |
210 | */ | |
211 | static void rose_insert_socket(struct sock *sk) | |
212 | { | |
213 | ||
214 | spin_lock_bh(&rose_list_lock); | |
215 | sk_add_node(sk, &rose_list); | |
216 | spin_unlock_bh(&rose_list_lock); | |
217 | } | |
218 | ||
219 | /* | |
220 | * Find a socket that wants to accept the Call Request we just | |
221 | * received. | |
222 | */ | |
223 | static struct sock *rose_find_listener(rose_address *addr, ax25_address *call) | |
224 | { | |
225 | struct sock *s; | |
226 | struct hlist_node *node; | |
227 | ||
228 | spin_lock_bh(&rose_list_lock); | |
229 | sk_for_each(s, node, &rose_list) { | |
230 | struct rose_sock *rose = rose_sk(s); | |
231 | ||
232 | if (!rosecmp(&rose->source_addr, addr) && | |
233 | !ax25cmp(&rose->source_call, call) && | |
234 | !rose->source_ndigis && s->sk_state == TCP_LISTEN) | |
235 | goto found; | |
236 | } | |
237 | ||
238 | sk_for_each(s, node, &rose_list) { | |
239 | struct rose_sock *rose = rose_sk(s); | |
240 | ||
241 | if (!rosecmp(&rose->source_addr, addr) && | |
242 | !ax25cmp(&rose->source_call, &null_ax25_address) && | |
243 | s->sk_state == TCP_LISTEN) | |
244 | goto found; | |
245 | } | |
246 | s = NULL; | |
247 | found: | |
248 | spin_unlock_bh(&rose_list_lock); | |
249 | return s; | |
250 | } | |
251 | ||
252 | /* | |
253 | * Find a connected ROSE socket given my LCI and device. | |
254 | */ | |
255 | struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh) | |
256 | { | |
257 | struct sock *s; | |
258 | struct hlist_node *node; | |
259 | ||
260 | spin_lock_bh(&rose_list_lock); | |
261 | sk_for_each(s, node, &rose_list) { | |
262 | struct rose_sock *rose = rose_sk(s); | |
263 | ||
264 | if (rose->lci == lci && rose->neighbour == neigh) | |
265 | goto found; | |
266 | } | |
267 | s = NULL; | |
268 | found: | |
269 | spin_unlock_bh(&rose_list_lock); | |
270 | return s; | |
271 | } | |
272 | ||
273 | /* | |
274 | * Find a unique LCI for a given device. | |
275 | */ | |
276 | unsigned int rose_new_lci(struct rose_neigh *neigh) | |
277 | { | |
278 | int lci; | |
279 | ||
280 | if (neigh->dce_mode) { | |
281 | for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++) | |
282 | if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) | |
283 | return lci; | |
284 | } else { | |
285 | for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--) | |
286 | if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) | |
287 | return lci; | |
288 | } | |
289 | ||
290 | return 0; | |
291 | } | |
292 | ||
293 | /* | |
294 | * Deferred destroy. | |
295 | */ | |
296 | void rose_destroy_socket(struct sock *); | |
297 | ||
298 | /* | |
299 | * Handler for deferred kills. | |
300 | */ | |
301 | static void rose_destroy_timer(unsigned long data) | |
302 | { | |
303 | rose_destroy_socket((struct sock *)data); | |
304 | } | |
305 | ||
306 | /* | |
307 | * This is called from user mode and the timers. Thus it protects itself | |
308 | * against interrupt users but doesn't worry about being called during | |
309 | * work. Once it is removed from the queue no interrupt or bottom half | |
310 | * will touch it and we are (fairly 8-) ) safe. | |
311 | */ | |
312 | void rose_destroy_socket(struct sock *sk) | |
313 | { | |
314 | struct sk_buff *skb; | |
315 | ||
316 | rose_remove_socket(sk); | |
317 | rose_stop_heartbeat(sk); | |
318 | rose_stop_idletimer(sk); | |
319 | rose_stop_timer(sk); | |
320 | ||
321 | rose_clear_queues(sk); /* Flush the queues */ | |
322 | ||
323 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
324 | if (skb->sk != sk) { /* A pending connection */ | |
325 | /* Queue the unaccepted socket for death */ | |
326 | sock_set_flag(skb->sk, SOCK_DEAD); | |
327 | rose_start_heartbeat(skb->sk); | |
328 | rose_sk(skb->sk)->state = ROSE_STATE_0; | |
329 | } | |
330 | ||
331 | kfree_skb(skb); | |
332 | } | |
333 | ||
334 | if (atomic_read(&sk->sk_wmem_alloc) || | |
335 | atomic_read(&sk->sk_rmem_alloc)) { | |
336 | /* Defer: outstanding buffers */ | |
337 | init_timer(&sk->sk_timer); | |
338 | sk->sk_timer.expires = jiffies + 10 * HZ; | |
339 | sk->sk_timer.function = rose_destroy_timer; | |
340 | sk->sk_timer.data = (unsigned long)sk; | |
341 | add_timer(&sk->sk_timer); | |
342 | } else | |
343 | sock_put(sk); | |
344 | } | |
345 | ||
346 | /* | |
347 | * Handling for system calls applied via the various interfaces to a | |
348 | * ROSE socket object. | |
349 | */ | |
350 | ||
351 | static int rose_setsockopt(struct socket *sock, int level, int optname, | |
352 | char __user *optval, int optlen) | |
353 | { | |
354 | struct sock *sk = sock->sk; | |
355 | struct rose_sock *rose = rose_sk(sk); | |
356 | int opt; | |
357 | ||
358 | if (level != SOL_ROSE) | |
359 | return -ENOPROTOOPT; | |
360 | ||
361 | if (optlen < sizeof(int)) | |
362 | return -EINVAL; | |
363 | ||
364 | if (get_user(opt, (int __user *)optval)) | |
365 | return -EFAULT; | |
366 | ||
367 | switch (optname) { | |
368 | case ROSE_DEFER: | |
369 | rose->defer = opt ? 1 : 0; | |
370 | return 0; | |
371 | ||
372 | case ROSE_T1: | |
373 | if (opt < 1) | |
374 | return -EINVAL; | |
375 | rose->t1 = opt * HZ; | |
376 | return 0; | |
377 | ||
378 | case ROSE_T2: | |
379 | if (opt < 1) | |
380 | return -EINVAL; | |
381 | rose->t2 = opt * HZ; | |
382 | return 0; | |
383 | ||
384 | case ROSE_T3: | |
385 | if (opt < 1) | |
386 | return -EINVAL; | |
387 | rose->t3 = opt * HZ; | |
388 | return 0; | |
389 | ||
390 | case ROSE_HOLDBACK: | |
391 | if (opt < 1) | |
392 | return -EINVAL; | |
393 | rose->hb = opt * HZ; | |
394 | return 0; | |
395 | ||
396 | case ROSE_IDLE: | |
397 | if (opt < 0) | |
398 | return -EINVAL; | |
399 | rose->idle = opt * 60 * HZ; | |
400 | return 0; | |
401 | ||
402 | case ROSE_QBITINCL: | |
403 | rose->qbitincl = opt ? 1 : 0; | |
404 | return 0; | |
405 | ||
406 | default: | |
407 | return -ENOPROTOOPT; | |
408 | } | |
409 | } | |
410 | ||
411 | static int rose_getsockopt(struct socket *sock, int level, int optname, | |
412 | char __user *optval, int __user *optlen) | |
413 | { | |
414 | struct sock *sk = sock->sk; | |
415 | struct rose_sock *rose = rose_sk(sk); | |
416 | int val = 0; | |
417 | int len; | |
418 | ||
419 | if (level != SOL_ROSE) | |
420 | return -ENOPROTOOPT; | |
421 | ||
422 | if (get_user(len, optlen)) | |
423 | return -EFAULT; | |
424 | ||
425 | if (len < 0) | |
426 | return -EINVAL; | |
427 | ||
428 | switch (optname) { | |
429 | case ROSE_DEFER: | |
430 | val = rose->defer; | |
431 | break; | |
432 | ||
433 | case ROSE_T1: | |
434 | val = rose->t1 / HZ; | |
435 | break; | |
436 | ||
437 | case ROSE_T2: | |
438 | val = rose->t2 / HZ; | |
439 | break; | |
440 | ||
441 | case ROSE_T3: | |
442 | val = rose->t3 / HZ; | |
443 | break; | |
444 | ||
445 | case ROSE_HOLDBACK: | |
446 | val = rose->hb / HZ; | |
447 | break; | |
448 | ||
449 | case ROSE_IDLE: | |
450 | val = rose->idle / (60 * HZ); | |
451 | break; | |
452 | ||
453 | case ROSE_QBITINCL: | |
454 | val = rose->qbitincl; | |
455 | break; | |
456 | ||
457 | default: | |
458 | return -ENOPROTOOPT; | |
459 | } | |
460 | ||
461 | len = min_t(unsigned int, len, sizeof(int)); | |
462 | ||
463 | if (put_user(len, optlen)) | |
464 | return -EFAULT; | |
465 | ||
466 | return copy_to_user(optval, &val, len) ? -EFAULT : 0; | |
467 | } | |
468 | ||
469 | static int rose_listen(struct socket *sock, int backlog) | |
470 | { | |
471 | struct sock *sk = sock->sk; | |
472 | ||
473 | if (sk->sk_state != TCP_LISTEN) { | |
474 | struct rose_sock *rose = rose_sk(sk); | |
475 | ||
476 | rose->dest_ndigis = 0; | |
477 | memset(&rose->dest_addr, 0, ROSE_ADDR_LEN); | |
478 | memset(&rose->dest_call, 0, AX25_ADDR_LEN); | |
479 | memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS); | |
480 | sk->sk_max_ack_backlog = backlog; | |
481 | sk->sk_state = TCP_LISTEN; | |
482 | return 0; | |
483 | } | |
484 | ||
485 | return -EOPNOTSUPP; | |
486 | } | |
487 | ||
488 | static struct proto rose_proto = { | |
489 | .name = "ROSE", | |
490 | .owner = THIS_MODULE, | |
491 | .obj_size = sizeof(struct rose_sock), | |
492 | }; | |
493 | ||
494 | static int rose_create(struct socket *sock, int protocol) | |
495 | { | |
496 | struct sock *sk; | |
497 | struct rose_sock *rose; | |
498 | ||
499 | if (sock->type != SOCK_SEQPACKET || protocol != 0) | |
500 | return -ESOCKTNOSUPPORT; | |
501 | ||
502 | if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL) | |
503 | return -ENOMEM; | |
504 | ||
505 | rose = rose_sk(sk); | |
506 | ||
507 | sock_init_data(sock, sk); | |
508 | ||
509 | skb_queue_head_init(&rose->ack_queue); | |
510 | #ifdef M_BIT | |
511 | skb_queue_head_init(&rose->frag_queue); | |
512 | rose->fraglen = 0; | |
513 | #endif | |
514 | ||
515 | sock->ops = &rose_proto_ops; | |
516 | sk->sk_protocol = protocol; | |
517 | ||
518 | init_timer(&rose->timer); | |
519 | init_timer(&rose->idletimer); | |
520 | ||
521 | rose->t1 = sysctl_rose_call_request_timeout; | |
522 | rose->t2 = sysctl_rose_reset_request_timeout; | |
523 | rose->t3 = sysctl_rose_clear_request_timeout; | |
524 | rose->hb = sysctl_rose_ack_hold_back_timeout; | |
525 | rose->idle = sysctl_rose_no_activity_timeout; | |
526 | ||
527 | rose->state = ROSE_STATE_0; | |
528 | ||
529 | return 0; | |
530 | } | |
531 | ||
532 | static struct sock *rose_make_new(struct sock *osk) | |
533 | { | |
534 | struct sock *sk; | |
535 | struct rose_sock *rose, *orose; | |
536 | ||
537 | if (osk->sk_type != SOCK_SEQPACKET) | |
538 | return NULL; | |
539 | ||
540 | if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL) | |
541 | return NULL; | |
542 | ||
543 | rose = rose_sk(sk); | |
544 | ||
545 | sock_init_data(NULL, sk); | |
546 | ||
547 | skb_queue_head_init(&rose->ack_queue); | |
548 | #ifdef M_BIT | |
549 | skb_queue_head_init(&rose->frag_queue); | |
550 | rose->fraglen = 0; | |
551 | #endif | |
552 | ||
553 | sk->sk_type = osk->sk_type; | |
554 | sk->sk_socket = osk->sk_socket; | |
555 | sk->sk_priority = osk->sk_priority; | |
556 | sk->sk_protocol = osk->sk_protocol; | |
557 | sk->sk_rcvbuf = osk->sk_rcvbuf; | |
558 | sk->sk_sndbuf = osk->sk_sndbuf; | |
559 | sk->sk_state = TCP_ESTABLISHED; | |
560 | sk->sk_sleep = osk->sk_sleep; | |
53b924b3 | 561 | sock_copy_flags(sk, osk); |
1da177e4 LT |
562 | |
563 | init_timer(&rose->timer); | |
564 | init_timer(&rose->idletimer); | |
565 | ||
566 | orose = rose_sk(osk); | |
567 | rose->t1 = orose->t1; | |
568 | rose->t2 = orose->t2; | |
569 | rose->t3 = orose->t3; | |
570 | rose->hb = orose->hb; | |
571 | rose->idle = orose->idle; | |
572 | rose->defer = orose->defer; | |
573 | rose->device = orose->device; | |
574 | rose->qbitincl = orose->qbitincl; | |
575 | ||
576 | return sk; | |
577 | } | |
578 | ||
579 | static int rose_release(struct socket *sock) | |
580 | { | |
581 | struct sock *sk = sock->sk; | |
582 | struct rose_sock *rose; | |
583 | ||
584 | if (sk == NULL) return 0; | |
585 | ||
586 | rose = rose_sk(sk); | |
587 | ||
588 | switch (rose->state) { | |
589 | case ROSE_STATE_0: | |
590 | rose_disconnect(sk, 0, -1, -1); | |
591 | rose_destroy_socket(sk); | |
592 | break; | |
593 | ||
594 | case ROSE_STATE_2: | |
595 | rose->neighbour->use--; | |
596 | rose_disconnect(sk, 0, -1, -1); | |
597 | rose_destroy_socket(sk); | |
598 | break; | |
599 | ||
600 | case ROSE_STATE_1: | |
601 | case ROSE_STATE_3: | |
602 | case ROSE_STATE_4: | |
603 | case ROSE_STATE_5: | |
604 | rose_clear_queues(sk); | |
605 | rose_stop_idletimer(sk); | |
606 | rose_write_internal(sk, ROSE_CLEAR_REQUEST); | |
607 | rose_start_t3timer(sk); | |
608 | rose->state = ROSE_STATE_2; | |
609 | sk->sk_state = TCP_CLOSE; | |
610 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
611 | sk->sk_state_change(sk); | |
612 | sock_set_flag(sk, SOCK_DEAD); | |
613 | sock_set_flag(sk, SOCK_DESTROY); | |
614 | break; | |
615 | ||
616 | default: | |
617 | break; | |
618 | } | |
619 | ||
620 | sock->sk = NULL; | |
621 | ||
622 | return 0; | |
623 | } | |
624 | ||
625 | static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
626 | { | |
627 | struct sock *sk = sock->sk; | |
628 | struct rose_sock *rose = rose_sk(sk); | |
629 | struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; | |
630 | struct net_device *dev; | |
01d7dd0e RB |
631 | ax25_address *source; |
632 | ax25_uid_assoc *user; | |
1da177e4 LT |
633 | int n; |
634 | ||
635 | if (!sock_flag(sk, SOCK_ZAPPED)) | |
636 | return -EINVAL; | |
637 | ||
638 | if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) | |
639 | return -EINVAL; | |
640 | ||
641 | if (addr->srose_family != AF_ROSE) | |
642 | return -EINVAL; | |
643 | ||
644 | if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) | |
645 | return -EINVAL; | |
646 | ||
647 | if (addr->srose_ndigis > ROSE_MAX_DIGIS) | |
648 | return -EINVAL; | |
649 | ||
650 | if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) { | |
651 | SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n"); | |
652 | return -EADDRNOTAVAIL; | |
653 | } | |
654 | ||
655 | source = &addr->srose_call; | |
656 | ||
01d7dd0e RB |
657 | user = ax25_findbyuid(current->euid); |
658 | if (user) { | |
659 | rose->source_call = user->call; | |
660 | ax25_uid_put(user); | |
661 | } else { | |
1da177e4 LT |
662 | if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) |
663 | return -EACCES; | |
01d7dd0e | 664 | rose->source_call = *source; |
1da177e4 LT |
665 | } |
666 | ||
667 | rose->source_addr = addr->srose_addr; | |
1da177e4 LT |
668 | rose->device = dev; |
669 | rose->source_ndigis = addr->srose_ndigis; | |
670 | ||
671 | if (addr_len == sizeof(struct full_sockaddr_rose)) { | |
672 | struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; | |
673 | for (n = 0 ; n < addr->srose_ndigis ; n++) | |
674 | rose->source_digis[n] = full_addr->srose_digis[n]; | |
675 | } else { | |
676 | if (rose->source_ndigis == 1) { | |
677 | rose->source_digis[0] = addr->srose_digi; | |
678 | } | |
679 | } | |
680 | ||
681 | rose_insert_socket(sk); | |
682 | ||
683 | sock_reset_flag(sk, SOCK_ZAPPED); | |
684 | SOCK_DEBUG(sk, "ROSE: socket is bound\n"); | |
685 | return 0; | |
686 | } | |
687 | ||
688 | static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags) | |
689 | { | |
690 | struct sock *sk = sock->sk; | |
691 | struct rose_sock *rose = rose_sk(sk); | |
692 | struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; | |
693 | unsigned char cause, diagnostic; | |
1da177e4 | 694 | struct net_device *dev; |
01d7dd0e | 695 | ax25_uid_assoc *user; |
1da177e4 LT |
696 | int n; |
697 | ||
698 | if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { | |
699 | sock->state = SS_CONNECTED; | |
700 | return 0; /* Connect completed during a ERESTARTSYS event */ | |
701 | } | |
702 | ||
703 | if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { | |
704 | sock->state = SS_UNCONNECTED; | |
705 | return -ECONNREFUSED; | |
706 | } | |
707 | ||
708 | if (sk->sk_state == TCP_ESTABLISHED) | |
709 | return -EISCONN; /* No reconnect on a seqpacket socket */ | |
710 | ||
711 | sk->sk_state = TCP_CLOSE; | |
712 | sock->state = SS_UNCONNECTED; | |
713 | ||
714 | if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) | |
715 | return -EINVAL; | |
716 | ||
717 | if (addr->srose_family != AF_ROSE) | |
718 | return -EINVAL; | |
719 | ||
720 | if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) | |
721 | return -EINVAL; | |
722 | ||
723 | if (addr->srose_ndigis > ROSE_MAX_DIGIS) | |
724 | return -EINVAL; | |
725 | ||
726 | /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */ | |
727 | if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS) | |
728 | return -EINVAL; | |
729 | ||
730 | rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, | |
731 | &diagnostic); | |
732 | if (!rose->neighbour) | |
733 | return -ENETUNREACH; | |
734 | ||
735 | rose->lci = rose_new_lci(rose->neighbour); | |
736 | if (!rose->lci) | |
737 | return -ENETUNREACH; | |
738 | ||
739 | if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ | |
740 | sock_reset_flag(sk, SOCK_ZAPPED); | |
741 | ||
742 | if ((dev = rose_dev_first()) == NULL) | |
743 | return -ENETUNREACH; | |
744 | ||
01d7dd0e RB |
745 | user = ax25_findbyuid(current->euid); |
746 | if (!user) | |
1da177e4 LT |
747 | return -EINVAL; |
748 | ||
749 | memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN); | |
01d7dd0e | 750 | rose->source_call = user->call; |
1da177e4 | 751 | rose->device = dev; |
01d7dd0e | 752 | ax25_uid_put(user); |
1da177e4 LT |
753 | |
754 | rose_insert_socket(sk); /* Finish the bind */ | |
755 | } | |
756 | ||
757 | rose->dest_addr = addr->srose_addr; | |
758 | rose->dest_call = addr->srose_call; | |
759 | rose->rand = ((long)rose & 0xFFFF) + rose->lci; | |
760 | rose->dest_ndigis = addr->srose_ndigis; | |
761 | ||
762 | if (addr_len == sizeof(struct full_sockaddr_rose)) { | |
763 | struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; | |
764 | for (n = 0 ; n < addr->srose_ndigis ; n++) | |
765 | rose->dest_digis[n] = full_addr->srose_digis[n]; | |
766 | } else { | |
767 | if (rose->dest_ndigis == 1) { | |
768 | rose->dest_digis[0] = addr->srose_digi; | |
769 | } | |
770 | } | |
771 | ||
772 | /* Move to connecting socket, start sending Connect Requests */ | |
773 | sock->state = SS_CONNECTING; | |
774 | sk->sk_state = TCP_SYN_SENT; | |
775 | ||
776 | rose->state = ROSE_STATE_1; | |
777 | ||
778 | rose->neighbour->use++; | |
779 | ||
780 | rose_write_internal(sk, ROSE_CALL_REQUEST); | |
781 | rose_start_heartbeat(sk); | |
782 | rose_start_t1timer(sk); | |
783 | ||
784 | /* Now the loop */ | |
785 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) | |
786 | return -EINPROGRESS; | |
787 | ||
788 | /* | |
789 | * A Connect Ack with Choke or timeout or failed routing will go to | |
790 | * closed. | |
791 | */ | |
792 | if (sk->sk_state == TCP_SYN_SENT) { | |
793 | struct task_struct *tsk = current; | |
794 | DECLARE_WAITQUEUE(wait, tsk); | |
795 | ||
796 | add_wait_queue(sk->sk_sleep, &wait); | |
797 | for (;;) { | |
798 | set_current_state(TASK_INTERRUPTIBLE); | |
799 | if (sk->sk_state != TCP_SYN_SENT) | |
800 | break; | |
801 | if (!signal_pending(tsk)) { | |
802 | schedule(); | |
803 | continue; | |
804 | } | |
805 | current->state = TASK_RUNNING; | |
806 | remove_wait_queue(sk->sk_sleep, &wait); | |
807 | return -ERESTARTSYS; | |
808 | } | |
809 | current->state = TASK_RUNNING; | |
810 | remove_wait_queue(sk->sk_sleep, &wait); | |
811 | } | |
812 | ||
813 | if (sk->sk_state != TCP_ESTABLISHED) { | |
814 | sock->state = SS_UNCONNECTED; | |
815 | return sock_error(sk); /* Always set at this point */ | |
816 | } | |
817 | ||
818 | sock->state = SS_CONNECTED; | |
819 | ||
820 | return 0; | |
821 | } | |
822 | ||
823 | static int rose_accept(struct socket *sock, struct socket *newsock, int flags) | |
824 | { | |
825 | struct task_struct *tsk = current; | |
826 | DECLARE_WAITQUEUE(wait, tsk); | |
827 | struct sk_buff *skb; | |
828 | struct sock *newsk; | |
829 | struct sock *sk; | |
830 | int err = 0; | |
831 | ||
832 | if ((sk = sock->sk) == NULL) | |
833 | return -EINVAL; | |
834 | ||
835 | lock_sock(sk); | |
836 | if (sk->sk_type != SOCK_SEQPACKET) { | |
837 | err = -EOPNOTSUPP; | |
838 | goto out; | |
839 | } | |
840 | ||
841 | if (sk->sk_state != TCP_LISTEN) { | |
842 | err = -EINVAL; | |
843 | goto out; | |
844 | } | |
845 | ||
846 | /* | |
847 | * The write queue this time is holding sockets ready to use | |
848 | * hooked into the SABM we saved | |
849 | */ | |
850 | add_wait_queue(sk->sk_sleep, &wait); | |
851 | for (;;) { | |
852 | skb = skb_dequeue(&sk->sk_receive_queue); | |
853 | if (skb) | |
854 | break; | |
855 | ||
856 | current->state = TASK_INTERRUPTIBLE; | |
857 | release_sock(sk); | |
858 | if (flags & O_NONBLOCK) { | |
859 | current->state = TASK_RUNNING; | |
860 | remove_wait_queue(sk->sk_sleep, &wait); | |
861 | return -EWOULDBLOCK; | |
862 | } | |
863 | if (!signal_pending(tsk)) { | |
864 | schedule(); | |
865 | lock_sock(sk); | |
866 | continue; | |
867 | } | |
868 | return -ERESTARTSYS; | |
869 | } | |
870 | current->state = TASK_RUNNING; | |
871 | remove_wait_queue(sk->sk_sleep, &wait); | |
872 | ||
873 | newsk = skb->sk; | |
874 | newsk->sk_socket = newsock; | |
875 | newsk->sk_sleep = &newsock->wait; | |
876 | ||
877 | /* Now attach up the new socket */ | |
878 | skb->sk = NULL; | |
879 | kfree_skb(skb); | |
880 | sk->sk_ack_backlog--; | |
881 | newsock->sk = newsk; | |
882 | ||
883 | out: | |
884 | release_sock(sk); | |
885 | ||
886 | return err; | |
887 | } | |
888 | ||
889 | static int rose_getname(struct socket *sock, struct sockaddr *uaddr, | |
890 | int *uaddr_len, int peer) | |
891 | { | |
892 | struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr; | |
893 | struct sock *sk = sock->sk; | |
894 | struct rose_sock *rose = rose_sk(sk); | |
895 | int n; | |
896 | ||
897 | if (peer != 0) { | |
898 | if (sk->sk_state != TCP_ESTABLISHED) | |
899 | return -ENOTCONN; | |
900 | srose->srose_family = AF_ROSE; | |
901 | srose->srose_addr = rose->dest_addr; | |
902 | srose->srose_call = rose->dest_call; | |
903 | srose->srose_ndigis = rose->dest_ndigis; | |
904 | for (n = 0; n < rose->dest_ndigis; n++) | |
905 | srose->srose_digis[n] = rose->dest_digis[n]; | |
906 | } else { | |
907 | srose->srose_family = AF_ROSE; | |
908 | srose->srose_addr = rose->source_addr; | |
909 | srose->srose_call = rose->source_call; | |
910 | srose->srose_ndigis = rose->source_ndigis; | |
911 | for (n = 0; n < rose->source_ndigis; n++) | |
912 | srose->srose_digis[n] = rose->source_digis[n]; | |
913 | } | |
914 | ||
915 | *uaddr_len = sizeof(struct full_sockaddr_rose); | |
916 | return 0; | |
917 | } | |
918 | ||
919 | int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci) | |
920 | { | |
921 | struct sock *sk; | |
922 | struct sock *make; | |
923 | struct rose_sock *make_rose; | |
924 | struct rose_facilities_struct facilities; | |
925 | int n, len; | |
926 | ||
927 | skb->sk = NULL; /* Initially we don't know who it's for */ | |
928 | ||
929 | /* | |
930 | * skb->data points to the rose frame start | |
931 | */ | |
932 | memset(&facilities, 0x00, sizeof(struct rose_facilities_struct)); | |
933 | ||
934 | len = (((skb->data[3] >> 4) & 0x0F) + 1) / 2; | |
935 | len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2; | |
936 | if (!rose_parse_facilities(skb->data + len + 4, &facilities)) { | |
937 | rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76); | |
938 | return 0; | |
939 | } | |
940 | ||
941 | sk = rose_find_listener(&facilities.source_addr, &facilities.source_call); | |
942 | ||
943 | /* | |
944 | * We can't accept the Call Request. | |
945 | */ | |
946 | if (sk == NULL || sk_acceptq_is_full(sk) || | |
947 | (make = rose_make_new(sk)) == NULL) { | |
948 | rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120); | |
949 | return 0; | |
950 | } | |
951 | ||
952 | skb->sk = make; | |
953 | make->sk_state = TCP_ESTABLISHED; | |
954 | make_rose = rose_sk(make); | |
955 | ||
956 | make_rose->lci = lci; | |
957 | make_rose->dest_addr = facilities.dest_addr; | |
958 | make_rose->dest_call = facilities.dest_call; | |
959 | make_rose->dest_ndigis = facilities.dest_ndigis; | |
960 | for (n = 0 ; n < facilities.dest_ndigis ; n++) | |
961 | make_rose->dest_digis[n] = facilities.dest_digis[n]; | |
962 | make_rose->source_addr = facilities.source_addr; | |
963 | make_rose->source_call = facilities.source_call; | |
964 | make_rose->source_ndigis = facilities.source_ndigis; | |
965 | for (n = 0 ; n < facilities.source_ndigis ; n++) | |
966 | make_rose->source_digis[n]= facilities.source_digis[n]; | |
967 | make_rose->neighbour = neigh; | |
968 | make_rose->device = dev; | |
969 | make_rose->facilities = facilities; | |
970 | ||
971 | make_rose->neighbour->use++; | |
972 | ||
973 | if (rose_sk(sk)->defer) { | |
974 | make_rose->state = ROSE_STATE_5; | |
975 | } else { | |
976 | rose_write_internal(make, ROSE_CALL_ACCEPTED); | |
977 | make_rose->state = ROSE_STATE_3; | |
978 | rose_start_idletimer(make); | |
979 | } | |
980 | ||
981 | make_rose->condition = 0x00; | |
982 | make_rose->vs = 0; | |
983 | make_rose->va = 0; | |
984 | make_rose->vr = 0; | |
985 | make_rose->vl = 0; | |
986 | sk->sk_ack_backlog++; | |
987 | ||
988 | rose_insert_socket(make); | |
989 | ||
990 | skb_queue_head(&sk->sk_receive_queue, skb); | |
991 | ||
992 | rose_start_heartbeat(make); | |
993 | ||
994 | if (!sock_flag(sk, SOCK_DEAD)) | |
995 | sk->sk_data_ready(sk, skb->len); | |
996 | ||
997 | return 1; | |
998 | } | |
999 | ||
1000 | static int rose_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1001 | struct msghdr *msg, size_t len) | |
1002 | { | |
1003 | struct sock *sk = sock->sk; | |
1004 | struct rose_sock *rose = rose_sk(sk); | |
1005 | struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name; | |
1006 | int err; | |
1007 | struct full_sockaddr_rose srose; | |
1008 | struct sk_buff *skb; | |
1009 | unsigned char *asmptr; | |
1010 | int n, size, qbit = 0; | |
1011 | ||
1012 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) | |
1013 | return -EINVAL; | |
1014 | ||
1015 | if (sock_flag(sk, SOCK_ZAPPED)) | |
1016 | return -EADDRNOTAVAIL; | |
1017 | ||
1018 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1019 | send_sig(SIGPIPE, current, 0); | |
1020 | return -EPIPE; | |
1021 | } | |
1022 | ||
1023 | if (rose->neighbour == NULL || rose->device == NULL) | |
1024 | return -ENETUNREACH; | |
1025 | ||
1026 | if (usrose != NULL) { | |
1027 | if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose)) | |
1028 | return -EINVAL; | |
1029 | memset(&srose, 0, sizeof(struct full_sockaddr_rose)); | |
1030 | memcpy(&srose, usrose, msg->msg_namelen); | |
1031 | if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 || | |
1032 | ax25cmp(&rose->dest_call, &srose.srose_call) != 0) | |
1033 | return -EISCONN; | |
1034 | if (srose.srose_ndigis != rose->dest_ndigis) | |
1035 | return -EISCONN; | |
1036 | if (srose.srose_ndigis == rose->dest_ndigis) { | |
1037 | for (n = 0 ; n < srose.srose_ndigis ; n++) | |
1038 | if (ax25cmp(&rose->dest_digis[n], | |
1039 | &srose.srose_digis[n])) | |
1040 | return -EISCONN; | |
1041 | } | |
1042 | if (srose.srose_family != AF_ROSE) | |
1043 | return -EINVAL; | |
1044 | } else { | |
1045 | if (sk->sk_state != TCP_ESTABLISHED) | |
1046 | return -ENOTCONN; | |
1047 | ||
1048 | srose.srose_family = AF_ROSE; | |
1049 | srose.srose_addr = rose->dest_addr; | |
1050 | srose.srose_call = rose->dest_call; | |
1051 | srose.srose_ndigis = rose->dest_ndigis; | |
1052 | for (n = 0 ; n < rose->dest_ndigis ; n++) | |
1053 | srose.srose_digis[n] = rose->dest_digis[n]; | |
1054 | } | |
1055 | ||
1056 | SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n"); | |
1057 | ||
1058 | /* Build a packet */ | |
1059 | SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n"); | |
1060 | size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN; | |
1061 | ||
1062 | if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) | |
1063 | return err; | |
1064 | ||
1065 | skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN); | |
1066 | ||
1067 | /* | |
1068 | * Put the data on the end | |
1069 | */ | |
1070 | SOCK_DEBUG(sk, "ROSE: Appending user data\n"); | |
1071 | ||
1072 | asmptr = skb->h.raw = skb_put(skb, len); | |
1073 | ||
1074 | err = memcpy_fromiovec(asmptr, msg->msg_iov, len); | |
1075 | if (err) { | |
1076 | kfree_skb(skb); | |
1077 | return err; | |
1078 | } | |
1079 | ||
1080 | /* | |
1081 | * If the Q BIT Include socket option is in force, the first | |
1082 | * byte of the user data is the logical value of the Q Bit. | |
1083 | */ | |
1084 | if (rose->qbitincl) { | |
1085 | qbit = skb->data[0]; | |
1086 | skb_pull(skb, 1); | |
1087 | } | |
1088 | ||
1089 | /* | |
1090 | * Push down the ROSE header | |
1091 | */ | |
1092 | asmptr = skb_push(skb, ROSE_MIN_LEN); | |
1093 | ||
1094 | SOCK_DEBUG(sk, "ROSE: Building Network Header.\n"); | |
1095 | ||
1096 | /* Build a ROSE Network header */ | |
1097 | asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI; | |
1098 | asmptr[1] = (rose->lci >> 0) & 0xFF; | |
1099 | asmptr[2] = ROSE_DATA; | |
1100 | ||
1101 | if (qbit) | |
1102 | asmptr[0] |= ROSE_Q_BIT; | |
1103 | ||
1104 | SOCK_DEBUG(sk, "ROSE: Built header.\n"); | |
1105 | ||
1106 | SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n"); | |
1107 | ||
1108 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1109 | kfree_skb(skb); | |
1110 | return -ENOTCONN; | |
1111 | } | |
1112 | ||
1113 | #ifdef M_BIT | |
1114 | #define ROSE_PACLEN (256-ROSE_MIN_LEN) | |
1115 | if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) { | |
1116 | unsigned char header[ROSE_MIN_LEN]; | |
1117 | struct sk_buff *skbn; | |
1118 | int frontlen; | |
1119 | int lg; | |
1120 | ||
1121 | /* Save a copy of the Header */ | |
1122 | memcpy(header, skb->data, ROSE_MIN_LEN); | |
1123 | skb_pull(skb, ROSE_MIN_LEN); | |
1124 | ||
1125 | frontlen = skb_headroom(skb); | |
1126 | ||
1127 | while (skb->len > 0) { | |
1128 | if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) { | |
1129 | kfree_skb(skb); | |
1130 | return err; | |
1131 | } | |
1132 | ||
1133 | skbn->sk = sk; | |
1134 | skbn->free = 1; | |
1135 | skbn->arp = 1; | |
1136 | ||
1137 | skb_reserve(skbn, frontlen); | |
1138 | ||
1139 | lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN; | |
1140 | ||
1141 | /* Copy the user data */ | |
1142 | memcpy(skb_put(skbn, lg), skb->data, lg); | |
1143 | skb_pull(skb, lg); | |
1144 | ||
1145 | /* Duplicate the Header */ | |
1146 | skb_push(skbn, ROSE_MIN_LEN); | |
1147 | memcpy(skbn->data, header, ROSE_MIN_LEN); | |
1148 | ||
1149 | if (skb->len > 0) | |
1150 | skbn->data[2] |= M_BIT; | |
1151 | ||
1152 | skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */ | |
1153 | } | |
1154 | ||
1155 | skb->free = 1; | |
1156 | kfree_skb(skb); | |
1157 | } else { | |
1158 | skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */ | |
1159 | } | |
1160 | #else | |
1161 | skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */ | |
1162 | #endif | |
1163 | ||
1164 | rose_kick(sk); | |
1165 | ||
1166 | return len; | |
1167 | } | |
1168 | ||
1169 | ||
1170 | static int rose_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1171 | struct msghdr *msg, size_t size, int flags) | |
1172 | { | |
1173 | struct sock *sk = sock->sk; | |
1174 | struct rose_sock *rose = rose_sk(sk); | |
1175 | struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name; | |
1176 | size_t copied; | |
1177 | unsigned char *asmptr; | |
1178 | struct sk_buff *skb; | |
1179 | int n, er, qbit; | |
1180 | ||
1181 | /* | |
1182 | * This works for seqpacket too. The receiver has ordered the queue for | |
1183 | * us! We do one quick check first though | |
1184 | */ | |
1185 | if (sk->sk_state != TCP_ESTABLISHED) | |
1186 | return -ENOTCONN; | |
1187 | ||
1188 | /* Now we can treat all alike */ | |
1189 | if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) | |
1190 | return er; | |
1191 | ||
1192 | qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT; | |
1193 | ||
1194 | skb_pull(skb, ROSE_MIN_LEN); | |
1195 | ||
1196 | if (rose->qbitincl) { | |
1197 | asmptr = skb_push(skb, 1); | |
1198 | *asmptr = qbit; | |
1199 | } | |
1200 | ||
1201 | skb->h.raw = skb->data; | |
1202 | copied = skb->len; | |
1203 | ||
1204 | if (copied > size) { | |
1205 | copied = size; | |
1206 | msg->msg_flags |= MSG_TRUNC; | |
1207 | } | |
1208 | ||
1209 | skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
1210 | ||
1211 | if (srose != NULL) { | |
1212 | srose->srose_family = AF_ROSE; | |
1213 | srose->srose_addr = rose->dest_addr; | |
1214 | srose->srose_call = rose->dest_call; | |
1215 | srose->srose_ndigis = rose->dest_ndigis; | |
1216 | if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) { | |
1217 | struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name; | |
1218 | for (n = 0 ; n < rose->dest_ndigis ; n++) | |
1219 | full_srose->srose_digis[n] = rose->dest_digis[n]; | |
1220 | msg->msg_namelen = sizeof(struct full_sockaddr_rose); | |
1221 | } else { | |
1222 | if (rose->dest_ndigis >= 1) { | |
1223 | srose->srose_ndigis = 1; | |
1224 | srose->srose_digi = rose->dest_digis[0]; | |
1225 | } | |
1226 | msg->msg_namelen = sizeof(struct sockaddr_rose); | |
1227 | } | |
1228 | } | |
1229 | ||
1230 | skb_free_datagram(sk, skb); | |
1231 | ||
1232 | return copied; | |
1233 | } | |
1234 | ||
1235 | ||
1236 | static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1237 | { | |
1238 | struct sock *sk = sock->sk; | |
1239 | struct rose_sock *rose = rose_sk(sk); | |
1240 | void __user *argp = (void __user *)arg; | |
1241 | ||
1242 | switch (cmd) { | |
1243 | case TIOCOUTQ: { | |
1244 | long amount; | |
1245 | amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); | |
1246 | if (amount < 0) | |
1247 | amount = 0; | |
20b7d10a | 1248 | return put_user(amount, (unsigned int __user *) argp); |
1da177e4 LT |
1249 | } |
1250 | ||
1251 | case TIOCINQ: { | |
1252 | struct sk_buff *skb; | |
1253 | long amount = 0L; | |
1254 | /* These two are safe on a single CPU system as only user tasks fiddle here */ | |
1255 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) | |
1256 | amount = skb->len; | |
20b7d10a | 1257 | return put_user(amount, (unsigned int __user *) argp); |
1da177e4 LT |
1258 | } |
1259 | ||
1260 | case SIOCGSTAMP: | |
20b7d10a | 1261 | return sock_get_timestamp(sk, (struct timeval __user *) argp); |
1da177e4 LT |
1262 | |
1263 | case SIOCGIFADDR: | |
1264 | case SIOCSIFADDR: | |
1265 | case SIOCGIFDSTADDR: | |
1266 | case SIOCSIFDSTADDR: | |
1267 | case SIOCGIFBRDADDR: | |
1268 | case SIOCSIFBRDADDR: | |
1269 | case SIOCGIFNETMASK: | |
1270 | case SIOCSIFNETMASK: | |
1271 | case SIOCGIFMETRIC: | |
1272 | case SIOCSIFMETRIC: | |
1273 | return -EINVAL; | |
1274 | ||
1275 | case SIOCADDRT: | |
1276 | case SIOCDELRT: | |
1277 | case SIOCRSCLRRT: | |
1278 | if (!capable(CAP_NET_ADMIN)) | |
1279 | return -EPERM; | |
1280 | return rose_rt_ioctl(cmd, argp); | |
1281 | ||
1282 | case SIOCRSGCAUSE: { | |
1283 | struct rose_cause_struct rose_cause; | |
1284 | rose_cause.cause = rose->cause; | |
1285 | rose_cause.diagnostic = rose->diagnostic; | |
1286 | return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0; | |
1287 | } | |
1288 | ||
1289 | case SIOCRSSCAUSE: { | |
1290 | struct rose_cause_struct rose_cause; | |
1291 | if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct))) | |
1292 | return -EFAULT; | |
1293 | rose->cause = rose_cause.cause; | |
1294 | rose->diagnostic = rose_cause.diagnostic; | |
1295 | return 0; | |
1296 | } | |
1297 | ||
1298 | case SIOCRSSL2CALL: | |
1299 | if (!capable(CAP_NET_ADMIN)) return -EPERM; | |
1300 | if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) | |
1301 | ax25_listen_release(&rose_callsign, NULL); | |
1302 | if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address))) | |
1303 | return -EFAULT; | |
1304 | if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) | |
1305 | ax25_listen_register(&rose_callsign, NULL); | |
1306 | return 0; | |
1307 | ||
1308 | case SIOCRSGL2CALL: | |
1309 | return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0; | |
1310 | ||
1311 | case SIOCRSACCEPT: | |
1312 | if (rose->state == ROSE_STATE_5) { | |
1313 | rose_write_internal(sk, ROSE_CALL_ACCEPTED); | |
1314 | rose_start_idletimer(sk); | |
1315 | rose->condition = 0x00; | |
1316 | rose->vs = 0; | |
1317 | rose->va = 0; | |
1318 | rose->vr = 0; | |
1319 | rose->vl = 0; | |
1320 | rose->state = ROSE_STATE_3; | |
1321 | } | |
1322 | return 0; | |
1323 | ||
1324 | default: | |
b5e5fa5e | 1325 | return -ENOIOCTLCMD; |
1da177e4 LT |
1326 | } |
1327 | ||
1328 | return 0; | |
1329 | } | |
1330 | ||
1331 | #ifdef CONFIG_PROC_FS | |
1332 | static void *rose_info_start(struct seq_file *seq, loff_t *pos) | |
1333 | { | |
1334 | int i; | |
1335 | struct sock *s; | |
1336 | struct hlist_node *node; | |
1337 | ||
1338 | spin_lock_bh(&rose_list_lock); | |
1339 | if (*pos == 0) | |
1340 | return SEQ_START_TOKEN; | |
1341 | ||
1342 | i = 1; | |
1343 | sk_for_each(s, node, &rose_list) { | |
1344 | if (i == *pos) | |
1345 | return s; | |
1346 | ++i; | |
1347 | } | |
1348 | return NULL; | |
1349 | } | |
1350 | ||
1351 | static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos) | |
1352 | { | |
1353 | ++*pos; | |
1354 | ||
1355 | return (v == SEQ_START_TOKEN) ? sk_head(&rose_list) | |
1356 | : sk_next((struct sock *)v); | |
1357 | } | |
1358 | ||
1359 | static void rose_info_stop(struct seq_file *seq, void *v) | |
1360 | { | |
1361 | spin_unlock_bh(&rose_list_lock); | |
1362 | } | |
1363 | ||
1364 | static int rose_info_show(struct seq_file *seq, void *v) | |
1365 | { | |
f75268cd RB |
1366 | char buf[11]; |
1367 | ||
1da177e4 LT |
1368 | if (v == SEQ_START_TOKEN) |
1369 | seq_puts(seq, | |
1370 | "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"); | |
1371 | ||
1372 | else { | |
1373 | struct sock *s = v; | |
1374 | struct rose_sock *rose = rose_sk(s); | |
1375 | const char *devname, *callsign; | |
1376 | const struct net_device *dev = rose->device; | |
1377 | ||
1378 | if (!dev) | |
1379 | devname = "???"; | |
1380 | else | |
1381 | devname = dev->name; | |
1382 | ||
1383 | seq_printf(seq, "%-10s %-9s ", | |
1384 | rose2asc(&rose->dest_addr), | |
f75268cd | 1385 | ax2asc(buf, &rose->dest_call)); |
1da177e4 LT |
1386 | |
1387 | if (ax25cmp(&rose->source_call, &null_ax25_address) == 0) | |
1388 | callsign = "??????-?"; | |
1389 | else | |
f75268cd | 1390 | callsign = ax2asc(buf, &rose->source_call); |
1da177e4 LT |
1391 | |
1392 | seq_printf(seq, | |
1393 | "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n", | |
1394 | rose2asc(&rose->source_addr), | |
1395 | callsign, | |
1396 | devname, | |
1397 | rose->lci & 0x0FFF, | |
1398 | (rose->neighbour) ? rose->neighbour->number : 0, | |
1399 | rose->state, | |
1400 | rose->vs, | |
1401 | rose->vr, | |
1402 | rose->va, | |
1403 | ax25_display_timer(&rose->timer) / HZ, | |
1404 | rose->t1 / HZ, | |
1405 | rose->t2 / HZ, | |
1406 | rose->t3 / HZ, | |
1407 | rose->hb / HZ, | |
1408 | ax25_display_timer(&rose->idletimer) / (60 * HZ), | |
1409 | rose->idle / (60 * HZ), | |
1410 | atomic_read(&s->sk_wmem_alloc), | |
1411 | atomic_read(&s->sk_rmem_alloc), | |
1412 | s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); | |
1413 | } | |
1414 | ||
1415 | return 0; | |
1416 | } | |
1417 | ||
1418 | static struct seq_operations rose_info_seqops = { | |
1419 | .start = rose_info_start, | |
1420 | .next = rose_info_next, | |
1421 | .stop = rose_info_stop, | |
1422 | .show = rose_info_show, | |
1423 | }; | |
1424 | ||
1425 | static int rose_info_open(struct inode *inode, struct file *file) | |
1426 | { | |
1427 | return seq_open(file, &rose_info_seqops); | |
1428 | } | |
1429 | ||
1430 | static struct file_operations rose_info_fops = { | |
1431 | .owner = THIS_MODULE, | |
1432 | .open = rose_info_open, | |
1433 | .read = seq_read, | |
1434 | .llseek = seq_lseek, | |
1435 | .release = seq_release, | |
1436 | }; | |
1437 | #endif /* CONFIG_PROC_FS */ | |
1438 | ||
1439 | static struct net_proto_family rose_family_ops = { | |
1440 | .family = PF_ROSE, | |
1441 | .create = rose_create, | |
1442 | .owner = THIS_MODULE, | |
1443 | }; | |
1444 | ||
1445 | static struct proto_ops rose_proto_ops = { | |
1446 | .family = PF_ROSE, | |
1447 | .owner = THIS_MODULE, | |
1448 | .release = rose_release, | |
1449 | .bind = rose_bind, | |
1450 | .connect = rose_connect, | |
1451 | .socketpair = sock_no_socketpair, | |
1452 | .accept = rose_accept, | |
1453 | .getname = rose_getname, | |
1454 | .poll = datagram_poll, | |
1455 | .ioctl = rose_ioctl, | |
1456 | .listen = rose_listen, | |
1457 | .shutdown = sock_no_shutdown, | |
1458 | .setsockopt = rose_setsockopt, | |
1459 | .getsockopt = rose_getsockopt, | |
1460 | .sendmsg = rose_sendmsg, | |
1461 | .recvmsg = rose_recvmsg, | |
1462 | .mmap = sock_no_mmap, | |
1463 | .sendpage = sock_no_sendpage, | |
1464 | }; | |
1465 | ||
1466 | static struct notifier_block rose_dev_notifier = { | |
1467 | .notifier_call = rose_device_event, | |
1468 | }; | |
1469 | ||
1470 | static struct net_device **dev_rose; | |
1471 | ||
1472 | static const char banner[] = KERN_INFO "F6FBB/G4KLX ROSE for Linux. Version 0.62 for AX25.037 Linux 2.4\n"; | |
1473 | ||
1474 | static int __init rose_proto_init(void) | |
1475 | { | |
1476 | int i; | |
a83cd2cc | 1477 | int rc; |
1da177e4 | 1478 | |
a83cd2cc AD |
1479 | if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) { |
1480 | printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n"); | |
1481 | rc = -EINVAL; | |
1482 | goto out; | |
1483 | } | |
1484 | ||
1485 | rc = proto_register(&rose_proto, 0); | |
1da177e4 LT |
1486 | if (rc != 0) |
1487 | goto out; | |
1488 | ||
1489 | rose_callsign = null_ax25_address; | |
1490 | ||
1da177e4 LT |
1491 | dev_rose = kmalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL); |
1492 | if (dev_rose == NULL) { | |
1493 | printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n"); | |
a83cd2cc AD |
1494 | rc = -ENOMEM; |
1495 | goto out_proto_unregister; | |
1da177e4 LT |
1496 | } |
1497 | ||
1498 | memset(dev_rose, 0x00, rose_ndevs * sizeof(struct net_device*)); | |
1499 | for (i = 0; i < rose_ndevs; i++) { | |
1500 | struct net_device *dev; | |
1501 | char name[IFNAMSIZ]; | |
1502 | ||
1503 | sprintf(name, "rose%d", i); | |
1504 | dev = alloc_netdev(sizeof(struct net_device_stats), | |
1505 | name, rose_setup); | |
1506 | if (!dev) { | |
1507 | printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n"); | |
70ff3b66 | 1508 | rc = -ENOMEM; |
1da177e4 LT |
1509 | goto fail; |
1510 | } | |
70ff3b66 AD |
1511 | rc = register_netdev(dev); |
1512 | if (rc) { | |
520d1b83 | 1513 | printk(KERN_ERR "ROSE: netdevice registration failed\n"); |
1da177e4 LT |
1514 | free_netdev(dev); |
1515 | goto fail; | |
1516 | } | |
1517 | dev_rose[i] = dev; | |
1518 | } | |
1519 | ||
1520 | sock_register(&rose_family_ops); | |
1521 | register_netdevice_notifier(&rose_dev_notifier); | |
1522 | printk(banner); | |
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); |