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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 | ||
b1d21ca8 RB |
69 | /* |
70 | * ROSE network devices are virtual network devices encapsulating ROSE | |
71 | * frames into AX.25 which will be sent through an AX.25 device, so form a | |
72 | * special "super class" of normal net devices; split their locks off into a | |
73 | * separate class since they always nest. | |
74 | */ | |
75 | static struct lock_class_key rose_netdev_xmit_lock_key; | |
76 | ||
1da177e4 LT |
77 | /* |
78 | * Convert a ROSE address into text. | |
79 | */ | |
80 | const char *rose2asc(const rose_address *addr) | |
81 | { | |
82 | static char buffer[11]; | |
83 | ||
84 | if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 && | |
85 | addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 && | |
86 | addr->rose_addr[4] == 0x00) { | |
87 | strcpy(buffer, "*"); | |
88 | } else { | |
89 | sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF, | |
90 | addr->rose_addr[1] & 0xFF, | |
91 | addr->rose_addr[2] & 0xFF, | |
92 | addr->rose_addr[3] & 0xFF, | |
93 | addr->rose_addr[4] & 0xFF); | |
94 | } | |
95 | ||
96 | return buffer; | |
97 | } | |
98 | ||
99 | /* | |
100 | * Compare two ROSE addresses, 0 == equal. | |
101 | */ | |
102 | int rosecmp(rose_address *addr1, rose_address *addr2) | |
103 | { | |
104 | int i; | |
105 | ||
106 | for (i = 0; i < 5; i++) | |
107 | if (addr1->rose_addr[i] != addr2->rose_addr[i]) | |
108 | return 1; | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | /* | |
114 | * Compare two ROSE addresses for only mask digits, 0 == equal. | |
115 | */ | |
116 | int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask) | |
117 | { | |
118 | int i, j; | |
119 | ||
120 | if (mask > 10) | |
121 | return 1; | |
122 | ||
123 | for (i = 0; i < mask; i++) { | |
124 | j = i / 2; | |
125 | ||
126 | if ((i % 2) != 0) { | |
127 | if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F)) | |
128 | return 1; | |
129 | } else { | |
130 | if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0)) | |
131 | return 1; | |
132 | } | |
133 | } | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
138 | /* | |
139 | * Socket removal during an interrupt is now safe. | |
140 | */ | |
141 | static void rose_remove_socket(struct sock *sk) | |
142 | { | |
143 | spin_lock_bh(&rose_list_lock); | |
144 | sk_del_node_init(sk); | |
145 | spin_unlock_bh(&rose_list_lock); | |
146 | } | |
147 | ||
148 | /* | |
149 | * Kill all bound sockets on a broken link layer connection to a | |
150 | * particular neighbour. | |
151 | */ | |
152 | void rose_kill_by_neigh(struct rose_neigh *neigh) | |
153 | { | |
154 | struct sock *s; | |
155 | struct hlist_node *node; | |
156 | ||
157 | spin_lock_bh(&rose_list_lock); | |
158 | sk_for_each(s, node, &rose_list) { | |
159 | struct rose_sock *rose = rose_sk(s); | |
160 | ||
161 | if (rose->neighbour == neigh) { | |
162 | rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); | |
163 | rose->neighbour->use--; | |
164 | rose->neighbour = NULL; | |
165 | } | |
166 | } | |
167 | spin_unlock_bh(&rose_list_lock); | |
168 | } | |
169 | ||
170 | /* | |
171 | * Kill all bound sockets on a dropped device. | |
172 | */ | |
173 | static void rose_kill_by_device(struct net_device *dev) | |
174 | { | |
175 | struct sock *s; | |
176 | struct hlist_node *node; | |
177 | ||
178 | spin_lock_bh(&rose_list_lock); | |
179 | sk_for_each(s, node, &rose_list) { | |
180 | struct rose_sock *rose = rose_sk(s); | |
181 | ||
182 | if (rose->device == dev) { | |
183 | rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); | |
184 | rose->neighbour->use--; | |
185 | rose->device = NULL; | |
186 | } | |
187 | } | |
188 | spin_unlock_bh(&rose_list_lock); | |
189 | } | |
190 | ||
191 | /* | |
192 | * Handle device status changes. | |
193 | */ | |
194 | static int rose_device_event(struct notifier_block *this, unsigned long event, | |
195 | void *ptr) | |
196 | { | |
197 | struct net_device *dev = (struct net_device *)ptr; | |
198 | ||
199 | if (event != NETDEV_DOWN) | |
200 | return NOTIFY_DONE; | |
201 | ||
202 | switch (dev->type) { | |
203 | case ARPHRD_ROSE: | |
204 | rose_kill_by_device(dev); | |
205 | break; | |
206 | case ARPHRD_AX25: | |
207 | rose_link_device_down(dev); | |
208 | rose_rt_device_down(dev); | |
209 | break; | |
210 | } | |
211 | ||
212 | return NOTIFY_DONE; | |
213 | } | |
214 | ||
215 | /* | |
216 | * Add a socket to the bound sockets list. | |
217 | */ | |
218 | static void rose_insert_socket(struct sock *sk) | |
219 | { | |
220 | ||
221 | spin_lock_bh(&rose_list_lock); | |
222 | sk_add_node(sk, &rose_list); | |
223 | spin_unlock_bh(&rose_list_lock); | |
224 | } | |
225 | ||
226 | /* | |
227 | * Find a socket that wants to accept the Call Request we just | |
228 | * received. | |
229 | */ | |
230 | static struct sock *rose_find_listener(rose_address *addr, ax25_address *call) | |
231 | { | |
232 | struct sock *s; | |
233 | struct hlist_node *node; | |
234 | ||
235 | spin_lock_bh(&rose_list_lock); | |
236 | sk_for_each(s, node, &rose_list) { | |
237 | struct rose_sock *rose = rose_sk(s); | |
238 | ||
239 | if (!rosecmp(&rose->source_addr, addr) && | |
240 | !ax25cmp(&rose->source_call, call) && | |
241 | !rose->source_ndigis && s->sk_state == TCP_LISTEN) | |
242 | goto found; | |
243 | } | |
244 | ||
245 | sk_for_each(s, node, &rose_list) { | |
246 | struct rose_sock *rose = rose_sk(s); | |
247 | ||
248 | if (!rosecmp(&rose->source_addr, addr) && | |
249 | !ax25cmp(&rose->source_call, &null_ax25_address) && | |
250 | s->sk_state == TCP_LISTEN) | |
251 | goto found; | |
252 | } | |
253 | s = NULL; | |
254 | found: | |
255 | spin_unlock_bh(&rose_list_lock); | |
256 | return s; | |
257 | } | |
258 | ||
259 | /* | |
260 | * Find a connected ROSE socket given my LCI and device. | |
261 | */ | |
262 | struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh) | |
263 | { | |
264 | struct sock *s; | |
265 | struct hlist_node *node; | |
266 | ||
267 | spin_lock_bh(&rose_list_lock); | |
268 | sk_for_each(s, node, &rose_list) { | |
269 | struct rose_sock *rose = rose_sk(s); | |
270 | ||
271 | if (rose->lci == lci && rose->neighbour == neigh) | |
272 | goto found; | |
273 | } | |
274 | s = NULL; | |
275 | found: | |
276 | spin_unlock_bh(&rose_list_lock); | |
277 | return s; | |
278 | } | |
279 | ||
280 | /* | |
281 | * Find a unique LCI for a given device. | |
282 | */ | |
283 | unsigned int rose_new_lci(struct rose_neigh *neigh) | |
284 | { | |
285 | int lci; | |
286 | ||
287 | if (neigh->dce_mode) { | |
288 | for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++) | |
289 | if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) | |
290 | return lci; | |
291 | } else { | |
292 | for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--) | |
293 | if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) | |
294 | return lci; | |
295 | } | |
296 | ||
297 | return 0; | |
298 | } | |
299 | ||
300 | /* | |
301 | * Deferred destroy. | |
302 | */ | |
303 | void rose_destroy_socket(struct sock *); | |
304 | ||
305 | /* | |
306 | * Handler for deferred kills. | |
307 | */ | |
308 | static void rose_destroy_timer(unsigned long data) | |
309 | { | |
310 | rose_destroy_socket((struct sock *)data); | |
311 | } | |
312 | ||
313 | /* | |
314 | * This is called from user mode and the timers. Thus it protects itself | |
315 | * against interrupt users but doesn't worry about being called during | |
316 | * work. Once it is removed from the queue no interrupt or bottom half | |
317 | * will touch it and we are (fairly 8-) ) safe. | |
318 | */ | |
319 | void rose_destroy_socket(struct sock *sk) | |
320 | { | |
321 | struct sk_buff *skb; | |
322 | ||
323 | rose_remove_socket(sk); | |
324 | rose_stop_heartbeat(sk); | |
325 | rose_stop_idletimer(sk); | |
326 | rose_stop_timer(sk); | |
327 | ||
328 | rose_clear_queues(sk); /* Flush the queues */ | |
329 | ||
330 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
331 | if (skb->sk != sk) { /* A pending connection */ | |
332 | /* Queue the unaccepted socket for death */ | |
333 | sock_set_flag(skb->sk, SOCK_DEAD); | |
334 | rose_start_heartbeat(skb->sk); | |
335 | rose_sk(skb->sk)->state = ROSE_STATE_0; | |
336 | } | |
337 | ||
338 | kfree_skb(skb); | |
339 | } | |
340 | ||
341 | if (atomic_read(&sk->sk_wmem_alloc) || | |
342 | atomic_read(&sk->sk_rmem_alloc)) { | |
343 | /* Defer: outstanding buffers */ | |
344 | init_timer(&sk->sk_timer); | |
345 | sk->sk_timer.expires = jiffies + 10 * HZ; | |
346 | sk->sk_timer.function = rose_destroy_timer; | |
347 | sk->sk_timer.data = (unsigned long)sk; | |
348 | add_timer(&sk->sk_timer); | |
349 | } else | |
350 | sock_put(sk); | |
351 | } | |
352 | ||
353 | /* | |
354 | * Handling for system calls applied via the various interfaces to a | |
355 | * ROSE socket object. | |
356 | */ | |
357 | ||
358 | static int rose_setsockopt(struct socket *sock, int level, int optname, | |
359 | char __user *optval, int optlen) | |
360 | { | |
361 | struct sock *sk = sock->sk; | |
362 | struct rose_sock *rose = rose_sk(sk); | |
363 | int opt; | |
364 | ||
365 | if (level != SOL_ROSE) | |
366 | return -ENOPROTOOPT; | |
367 | ||
368 | if (optlen < sizeof(int)) | |
369 | return -EINVAL; | |
370 | ||
371 | if (get_user(opt, (int __user *)optval)) | |
372 | return -EFAULT; | |
373 | ||
374 | switch (optname) { | |
375 | case ROSE_DEFER: | |
376 | rose->defer = opt ? 1 : 0; | |
377 | return 0; | |
378 | ||
379 | case ROSE_T1: | |
380 | if (opt < 1) | |
381 | return -EINVAL; | |
382 | rose->t1 = opt * HZ; | |
383 | return 0; | |
384 | ||
385 | case ROSE_T2: | |
386 | if (opt < 1) | |
387 | return -EINVAL; | |
388 | rose->t2 = opt * HZ; | |
389 | return 0; | |
390 | ||
391 | case ROSE_T3: | |
392 | if (opt < 1) | |
393 | return -EINVAL; | |
394 | rose->t3 = opt * HZ; | |
395 | return 0; | |
396 | ||
397 | case ROSE_HOLDBACK: | |
398 | if (opt < 1) | |
399 | return -EINVAL; | |
400 | rose->hb = opt * HZ; | |
401 | return 0; | |
402 | ||
403 | case ROSE_IDLE: | |
404 | if (opt < 0) | |
405 | return -EINVAL; | |
406 | rose->idle = opt * 60 * HZ; | |
407 | return 0; | |
408 | ||
409 | case ROSE_QBITINCL: | |
410 | rose->qbitincl = opt ? 1 : 0; | |
411 | return 0; | |
412 | ||
413 | default: | |
414 | return -ENOPROTOOPT; | |
415 | } | |
416 | } | |
417 | ||
418 | static int rose_getsockopt(struct socket *sock, int level, int optname, | |
419 | char __user *optval, int __user *optlen) | |
420 | { | |
421 | struct sock *sk = sock->sk; | |
422 | struct rose_sock *rose = rose_sk(sk); | |
423 | int val = 0; | |
424 | int len; | |
425 | ||
426 | if (level != SOL_ROSE) | |
427 | return -ENOPROTOOPT; | |
428 | ||
429 | if (get_user(len, optlen)) | |
430 | return -EFAULT; | |
431 | ||
432 | if (len < 0) | |
433 | return -EINVAL; | |
434 | ||
435 | switch (optname) { | |
436 | case ROSE_DEFER: | |
437 | val = rose->defer; | |
438 | break; | |
439 | ||
440 | case ROSE_T1: | |
441 | val = rose->t1 / HZ; | |
442 | break; | |
443 | ||
444 | case ROSE_T2: | |
445 | val = rose->t2 / HZ; | |
446 | break; | |
447 | ||
448 | case ROSE_T3: | |
449 | val = rose->t3 / HZ; | |
450 | break; | |
451 | ||
452 | case ROSE_HOLDBACK: | |
453 | val = rose->hb / HZ; | |
454 | break; | |
455 | ||
456 | case ROSE_IDLE: | |
457 | val = rose->idle / (60 * HZ); | |
458 | break; | |
459 | ||
460 | case ROSE_QBITINCL: | |
461 | val = rose->qbitincl; | |
462 | break; | |
463 | ||
464 | default: | |
465 | return -ENOPROTOOPT; | |
466 | } | |
467 | ||
468 | len = min_t(unsigned int, len, sizeof(int)); | |
469 | ||
470 | if (put_user(len, optlen)) | |
471 | return -EFAULT; | |
472 | ||
473 | return copy_to_user(optval, &val, len) ? -EFAULT : 0; | |
474 | } | |
475 | ||
476 | static int rose_listen(struct socket *sock, int backlog) | |
477 | { | |
478 | struct sock *sk = sock->sk; | |
479 | ||
480 | if (sk->sk_state != TCP_LISTEN) { | |
481 | struct rose_sock *rose = rose_sk(sk); | |
482 | ||
483 | rose->dest_ndigis = 0; | |
484 | memset(&rose->dest_addr, 0, ROSE_ADDR_LEN); | |
485 | memset(&rose->dest_call, 0, AX25_ADDR_LEN); | |
486 | memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS); | |
487 | sk->sk_max_ack_backlog = backlog; | |
488 | sk->sk_state = TCP_LISTEN; | |
489 | return 0; | |
490 | } | |
491 | ||
492 | return -EOPNOTSUPP; | |
493 | } | |
494 | ||
495 | static struct proto rose_proto = { | |
496 | .name = "ROSE", | |
497 | .owner = THIS_MODULE, | |
498 | .obj_size = sizeof(struct rose_sock), | |
499 | }; | |
500 | ||
501 | static int rose_create(struct socket *sock, int protocol) | |
502 | { | |
503 | struct sock *sk; | |
504 | struct rose_sock *rose; | |
505 | ||
506 | if (sock->type != SOCK_SEQPACKET || protocol != 0) | |
507 | return -ESOCKTNOSUPPORT; | |
508 | ||
509 | if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL) | |
510 | return -ENOMEM; | |
511 | ||
512 | rose = rose_sk(sk); | |
513 | ||
514 | sock_init_data(sock, sk); | |
515 | ||
516 | skb_queue_head_init(&rose->ack_queue); | |
517 | #ifdef M_BIT | |
518 | skb_queue_head_init(&rose->frag_queue); | |
519 | rose->fraglen = 0; | |
520 | #endif | |
521 | ||
522 | sock->ops = &rose_proto_ops; | |
523 | sk->sk_protocol = protocol; | |
524 | ||
525 | init_timer(&rose->timer); | |
526 | init_timer(&rose->idletimer); | |
527 | ||
82e84249 RB |
528 | rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout); |
529 | rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout); | |
530 | rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout); | |
531 | rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout); | |
532 | rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout); | |
1da177e4 LT |
533 | |
534 | rose->state = ROSE_STATE_0; | |
535 | ||
536 | return 0; | |
537 | } | |
538 | ||
539 | static struct sock *rose_make_new(struct sock *osk) | |
540 | { | |
541 | struct sock *sk; | |
542 | struct rose_sock *rose, *orose; | |
543 | ||
544 | if (osk->sk_type != SOCK_SEQPACKET) | |
545 | return NULL; | |
546 | ||
547 | if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL) | |
548 | return NULL; | |
549 | ||
550 | rose = rose_sk(sk); | |
551 | ||
552 | sock_init_data(NULL, sk); | |
553 | ||
554 | skb_queue_head_init(&rose->ack_queue); | |
555 | #ifdef M_BIT | |
556 | skb_queue_head_init(&rose->frag_queue); | |
557 | rose->fraglen = 0; | |
558 | #endif | |
559 | ||
560 | sk->sk_type = osk->sk_type; | |
561 | sk->sk_socket = osk->sk_socket; | |
562 | sk->sk_priority = osk->sk_priority; | |
563 | sk->sk_protocol = osk->sk_protocol; | |
564 | sk->sk_rcvbuf = osk->sk_rcvbuf; | |
565 | sk->sk_sndbuf = osk->sk_sndbuf; | |
566 | sk->sk_state = TCP_ESTABLISHED; | |
567 | sk->sk_sleep = osk->sk_sleep; | |
53b924b3 | 568 | sock_copy_flags(sk, osk); |
1da177e4 LT |
569 | |
570 | init_timer(&rose->timer); | |
571 | init_timer(&rose->idletimer); | |
572 | ||
573 | orose = rose_sk(osk); | |
574 | rose->t1 = orose->t1; | |
575 | rose->t2 = orose->t2; | |
576 | rose->t3 = orose->t3; | |
577 | rose->hb = orose->hb; | |
578 | rose->idle = orose->idle; | |
579 | rose->defer = orose->defer; | |
580 | rose->device = orose->device; | |
581 | rose->qbitincl = orose->qbitincl; | |
582 | ||
583 | return sk; | |
584 | } | |
585 | ||
586 | static int rose_release(struct socket *sock) | |
587 | { | |
588 | struct sock *sk = sock->sk; | |
589 | struct rose_sock *rose; | |
590 | ||
591 | if (sk == NULL) return 0; | |
592 | ||
593 | rose = rose_sk(sk); | |
594 | ||
595 | switch (rose->state) { | |
596 | case ROSE_STATE_0: | |
597 | rose_disconnect(sk, 0, -1, -1); | |
598 | rose_destroy_socket(sk); | |
599 | break; | |
600 | ||
601 | case ROSE_STATE_2: | |
602 | rose->neighbour->use--; | |
603 | rose_disconnect(sk, 0, -1, -1); | |
604 | rose_destroy_socket(sk); | |
605 | break; | |
606 | ||
607 | case ROSE_STATE_1: | |
608 | case ROSE_STATE_3: | |
609 | case ROSE_STATE_4: | |
610 | case ROSE_STATE_5: | |
611 | rose_clear_queues(sk); | |
612 | rose_stop_idletimer(sk); | |
613 | rose_write_internal(sk, ROSE_CLEAR_REQUEST); | |
614 | rose_start_t3timer(sk); | |
615 | rose->state = ROSE_STATE_2; | |
616 | sk->sk_state = TCP_CLOSE; | |
617 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
618 | sk->sk_state_change(sk); | |
619 | sock_set_flag(sk, SOCK_DEAD); | |
620 | sock_set_flag(sk, SOCK_DESTROY); | |
621 | break; | |
622 | ||
623 | default: | |
624 | break; | |
625 | } | |
626 | ||
627 | sock->sk = NULL; | |
628 | ||
629 | return 0; | |
630 | } | |
631 | ||
632 | static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
633 | { | |
634 | struct sock *sk = sock->sk; | |
635 | struct rose_sock *rose = rose_sk(sk); | |
636 | struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; | |
637 | struct net_device *dev; | |
01d7dd0e RB |
638 | ax25_address *source; |
639 | ax25_uid_assoc *user; | |
1da177e4 LT |
640 | int n; |
641 | ||
642 | if (!sock_flag(sk, SOCK_ZAPPED)) | |
643 | return -EINVAL; | |
644 | ||
645 | if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) | |
646 | return -EINVAL; | |
647 | ||
648 | if (addr->srose_family != AF_ROSE) | |
649 | return -EINVAL; | |
650 | ||
651 | if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) | |
652 | return -EINVAL; | |
653 | ||
654 | if (addr->srose_ndigis > ROSE_MAX_DIGIS) | |
655 | return -EINVAL; | |
656 | ||
657 | if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) { | |
658 | SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n"); | |
659 | return -EADDRNOTAVAIL; | |
660 | } | |
661 | ||
662 | source = &addr->srose_call; | |
663 | ||
01d7dd0e RB |
664 | user = ax25_findbyuid(current->euid); |
665 | if (user) { | |
666 | rose->source_call = user->call; | |
667 | ax25_uid_put(user); | |
668 | } else { | |
1da177e4 LT |
669 | if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) |
670 | return -EACCES; | |
01d7dd0e | 671 | rose->source_call = *source; |
1da177e4 LT |
672 | } |
673 | ||
674 | rose->source_addr = addr->srose_addr; | |
1da177e4 LT |
675 | rose->device = dev; |
676 | rose->source_ndigis = addr->srose_ndigis; | |
677 | ||
678 | if (addr_len == sizeof(struct full_sockaddr_rose)) { | |
679 | struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; | |
680 | for (n = 0 ; n < addr->srose_ndigis ; n++) | |
681 | rose->source_digis[n] = full_addr->srose_digis[n]; | |
682 | } else { | |
683 | if (rose->source_ndigis == 1) { | |
684 | rose->source_digis[0] = addr->srose_digi; | |
685 | } | |
686 | } | |
687 | ||
688 | rose_insert_socket(sk); | |
689 | ||
690 | sock_reset_flag(sk, SOCK_ZAPPED); | |
691 | SOCK_DEBUG(sk, "ROSE: socket is bound\n"); | |
692 | return 0; | |
693 | } | |
694 | ||
695 | static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags) | |
696 | { | |
697 | struct sock *sk = sock->sk; | |
698 | struct rose_sock *rose = rose_sk(sk); | |
699 | struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; | |
700 | unsigned char cause, diagnostic; | |
1da177e4 | 701 | struct net_device *dev; |
01d7dd0e | 702 | ax25_uid_assoc *user; |
2536b94a | 703 | int n, err = 0; |
1da177e4 LT |
704 | |
705 | if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) | |
706 | return -EINVAL; | |
707 | ||
708 | if (addr->srose_family != AF_ROSE) | |
709 | return -EINVAL; | |
710 | ||
711 | if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) | |
712 | return -EINVAL; | |
713 | ||
714 | if (addr->srose_ndigis > ROSE_MAX_DIGIS) | |
715 | return -EINVAL; | |
716 | ||
717 | /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */ | |
718 | if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS) | |
719 | return -EINVAL; | |
720 | ||
2536b94a RB |
721 | lock_sock(sk); |
722 | ||
723 | if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { | |
724 | /* Connect completed during a ERESTARTSYS event */ | |
725 | sock->state = SS_CONNECTED; | |
726 | goto out_release; | |
727 | } | |
728 | ||
729 | if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { | |
730 | sock->state = SS_UNCONNECTED; | |
731 | err = -ECONNREFUSED; | |
732 | goto out_release; | |
733 | } | |
734 | ||
735 | if (sk->sk_state == TCP_ESTABLISHED) { | |
736 | /* No reconnect on a seqpacket socket */ | |
737 | err = -EISCONN; | |
738 | goto out_release; | |
739 | } | |
740 | ||
741 | sk->sk_state = TCP_CLOSE; | |
742 | sock->state = SS_UNCONNECTED; | |
743 | ||
1da177e4 LT |
744 | rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, |
745 | &diagnostic); | |
746 | if (!rose->neighbour) | |
747 | return -ENETUNREACH; | |
748 | ||
749 | rose->lci = rose_new_lci(rose->neighbour); | |
2536b94a RB |
750 | if (!rose->lci) { |
751 | err = -ENETUNREACH; | |
752 | goto out_release; | |
753 | } | |
1da177e4 LT |
754 | |
755 | if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ | |
756 | sock_reset_flag(sk, SOCK_ZAPPED); | |
757 | ||
2536b94a RB |
758 | if ((dev = rose_dev_first()) == NULL) { |
759 | err = -ENETUNREACH; | |
760 | goto out_release; | |
761 | } | |
1da177e4 | 762 | |
01d7dd0e | 763 | user = ax25_findbyuid(current->euid); |
2536b94a RB |
764 | if (!user) { |
765 | err = -EINVAL; | |
766 | goto out_release; | |
767 | } | |
1da177e4 LT |
768 | |
769 | memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN); | |
01d7dd0e | 770 | rose->source_call = user->call; |
1da177e4 | 771 | rose->device = dev; |
01d7dd0e | 772 | ax25_uid_put(user); |
1da177e4 LT |
773 | |
774 | rose_insert_socket(sk); /* Finish the bind */ | |
775 | } | |
d85838c5 | 776 | rose_try_next_neigh: |
1da177e4 LT |
777 | rose->dest_addr = addr->srose_addr; |
778 | rose->dest_call = addr->srose_call; | |
779 | rose->rand = ((long)rose & 0xFFFF) + rose->lci; | |
780 | rose->dest_ndigis = addr->srose_ndigis; | |
781 | ||
782 | if (addr_len == sizeof(struct full_sockaddr_rose)) { | |
783 | struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; | |
784 | for (n = 0 ; n < addr->srose_ndigis ; n++) | |
785 | rose->dest_digis[n] = full_addr->srose_digis[n]; | |
786 | } else { | |
787 | if (rose->dest_ndigis == 1) { | |
788 | rose->dest_digis[0] = addr->srose_digi; | |
789 | } | |
790 | } | |
791 | ||
792 | /* Move to connecting socket, start sending Connect Requests */ | |
793 | sock->state = SS_CONNECTING; | |
794 | sk->sk_state = TCP_SYN_SENT; | |
795 | ||
796 | rose->state = ROSE_STATE_1; | |
797 | ||
798 | rose->neighbour->use++; | |
799 | ||
800 | rose_write_internal(sk, ROSE_CALL_REQUEST); | |
801 | rose_start_heartbeat(sk); | |
802 | rose_start_t1timer(sk); | |
803 | ||
804 | /* Now the loop */ | |
2536b94a RB |
805 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { |
806 | err = -EINPROGRESS; | |
807 | goto out_release; | |
808 | } | |
1da177e4 LT |
809 | |
810 | /* | |
811 | * A Connect Ack with Choke or timeout or failed routing will go to | |
812 | * closed. | |
813 | */ | |
814 | if (sk->sk_state == TCP_SYN_SENT) { | |
75606dc6 | 815 | DEFINE_WAIT(wait); |
1da177e4 | 816 | |
1da177e4 | 817 | for (;;) { |
75606dc6 | 818 | prepare_to_wait(sk->sk_sleep, &wait, |
6140efb5 | 819 | TASK_INTERRUPTIBLE); |
1da177e4 LT |
820 | if (sk->sk_state != TCP_SYN_SENT) |
821 | break; | |
75606dc6 RB |
822 | if (!signal_pending(current)) { |
823 | release_sock(sk); | |
1da177e4 | 824 | schedule(); |
2536b94a | 825 | lock_sock(sk); |
1da177e4 LT |
826 | continue; |
827 | } | |
75606dc6 RB |
828 | err = -ERESTARTSYS; |
829 | break; | |
1da177e4 | 830 | } |
75606dc6 RB |
831 | finish_wait(sk->sk_sleep, &wait); |
832 | ||
833 | if (err) | |
834 | goto out_release; | |
1da177e4 LT |
835 | } |
836 | ||
837 | if (sk->sk_state != TCP_ESTABLISHED) { | |
d85838c5 RB |
838 | /* Try next neighbour */ |
839 | rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic); | |
840 | if (rose->neighbour) | |
841 | goto rose_try_next_neigh; | |
2536b94a RB |
842 | |
843 | /* No more neighbours */ | |
1da177e4 | 844 | sock->state = SS_UNCONNECTED; |
2536b94a RB |
845 | err = sock_error(sk); /* Always set at this point */ |
846 | goto out_release; | |
1da177e4 LT |
847 | } |
848 | ||
849 | sock->state = SS_CONNECTED; | |
850 | ||
2536b94a RB |
851 | out_release: |
852 | release_sock(sk); | |
853 | ||
854 | return err; | |
1da177e4 LT |
855 | } |
856 | ||
857 | static int rose_accept(struct socket *sock, struct socket *newsock, int flags) | |
858 | { | |
1da177e4 LT |
859 | struct sk_buff *skb; |
860 | struct sock *newsk; | |
75606dc6 | 861 | DEFINE_WAIT(wait); |
1da177e4 LT |
862 | struct sock *sk; |
863 | int err = 0; | |
864 | ||
865 | if ((sk = sock->sk) == NULL) | |
866 | return -EINVAL; | |
867 | ||
868 | lock_sock(sk); | |
869 | if (sk->sk_type != SOCK_SEQPACKET) { | |
870 | err = -EOPNOTSUPP; | |
75606dc6 | 871 | goto out_release; |
1da177e4 LT |
872 | } |
873 | ||
874 | if (sk->sk_state != TCP_LISTEN) { | |
875 | err = -EINVAL; | |
75606dc6 | 876 | goto out_release; |
1da177e4 LT |
877 | } |
878 | ||
879 | /* | |
880 | * The write queue this time is holding sockets ready to use | |
881 | * hooked into the SABM we saved | |
882 | */ | |
1da177e4 | 883 | for (;;) { |
75606dc6 RB |
884 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); |
885 | ||
1da177e4 LT |
886 | skb = skb_dequeue(&sk->sk_receive_queue); |
887 | if (skb) | |
888 | break; | |
889 | ||
1da177e4 | 890 | if (flags & O_NONBLOCK) { |
75606dc6 RB |
891 | err = -EWOULDBLOCK; |
892 | break; | |
1da177e4 | 893 | } |
75606dc6 RB |
894 | if (!signal_pending(current)) { |
895 | release_sock(sk); | |
1da177e4 LT |
896 | schedule(); |
897 | lock_sock(sk); | |
898 | continue; | |
899 | } | |
75606dc6 RB |
900 | err = -ERESTARTSYS; |
901 | break; | |
1da177e4 | 902 | } |
75606dc6 RB |
903 | finish_wait(sk->sk_sleep, &wait); |
904 | if (err) | |
905 | goto out_release; | |
1da177e4 LT |
906 | |
907 | newsk = skb->sk; | |
908 | newsk->sk_socket = newsock; | |
909 | newsk->sk_sleep = &newsock->wait; | |
910 | ||
911 | /* Now attach up the new socket */ | |
912 | skb->sk = NULL; | |
913 | kfree_skb(skb); | |
914 | sk->sk_ack_backlog--; | |
915 | newsock->sk = newsk; | |
916 | ||
75606dc6 | 917 | out_release: |
1da177e4 LT |
918 | release_sock(sk); |
919 | ||
920 | return err; | |
921 | } | |
922 | ||
923 | static int rose_getname(struct socket *sock, struct sockaddr *uaddr, | |
924 | int *uaddr_len, int peer) | |
925 | { | |
926 | struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr; | |
927 | struct sock *sk = sock->sk; | |
928 | struct rose_sock *rose = rose_sk(sk); | |
929 | int n; | |
930 | ||
931 | if (peer != 0) { | |
932 | if (sk->sk_state != TCP_ESTABLISHED) | |
933 | return -ENOTCONN; | |
934 | srose->srose_family = AF_ROSE; | |
935 | srose->srose_addr = rose->dest_addr; | |
936 | srose->srose_call = rose->dest_call; | |
937 | srose->srose_ndigis = rose->dest_ndigis; | |
938 | for (n = 0; n < rose->dest_ndigis; n++) | |
939 | srose->srose_digis[n] = rose->dest_digis[n]; | |
940 | } else { | |
941 | srose->srose_family = AF_ROSE; | |
942 | srose->srose_addr = rose->source_addr; | |
943 | srose->srose_call = rose->source_call; | |
944 | srose->srose_ndigis = rose->source_ndigis; | |
945 | for (n = 0; n < rose->source_ndigis; n++) | |
946 | srose->srose_digis[n] = rose->source_digis[n]; | |
947 | } | |
948 | ||
949 | *uaddr_len = sizeof(struct full_sockaddr_rose); | |
950 | return 0; | |
951 | } | |
952 | ||
953 | int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci) | |
954 | { | |
955 | struct sock *sk; | |
956 | struct sock *make; | |
957 | struct rose_sock *make_rose; | |
958 | struct rose_facilities_struct facilities; | |
959 | int n, len; | |
960 | ||
961 | skb->sk = NULL; /* Initially we don't know who it's for */ | |
962 | ||
963 | /* | |
964 | * skb->data points to the rose frame start | |
965 | */ | |
966 | memset(&facilities, 0x00, sizeof(struct rose_facilities_struct)); | |
967 | ||
968 | len = (((skb->data[3] >> 4) & 0x0F) + 1) / 2; | |
969 | len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2; | |
970 | if (!rose_parse_facilities(skb->data + len + 4, &facilities)) { | |
971 | rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76); | |
972 | return 0; | |
973 | } | |
974 | ||
975 | sk = rose_find_listener(&facilities.source_addr, &facilities.source_call); | |
976 | ||
977 | /* | |
978 | * We can't accept the Call Request. | |
979 | */ | |
980 | if (sk == NULL || sk_acceptq_is_full(sk) || | |
981 | (make = rose_make_new(sk)) == NULL) { | |
982 | rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120); | |
983 | return 0; | |
984 | } | |
985 | ||
986 | skb->sk = make; | |
987 | make->sk_state = TCP_ESTABLISHED; | |
988 | make_rose = rose_sk(make); | |
989 | ||
990 | make_rose->lci = lci; | |
991 | make_rose->dest_addr = facilities.dest_addr; | |
992 | make_rose->dest_call = facilities.dest_call; | |
993 | make_rose->dest_ndigis = facilities.dest_ndigis; | |
994 | for (n = 0 ; n < facilities.dest_ndigis ; n++) | |
995 | make_rose->dest_digis[n] = facilities.dest_digis[n]; | |
996 | make_rose->source_addr = facilities.source_addr; | |
997 | make_rose->source_call = facilities.source_call; | |
998 | make_rose->source_ndigis = facilities.source_ndigis; | |
999 | for (n = 0 ; n < facilities.source_ndigis ; n++) | |
1000 | make_rose->source_digis[n]= facilities.source_digis[n]; | |
1001 | make_rose->neighbour = neigh; | |
1002 | make_rose->device = dev; | |
1003 | make_rose->facilities = facilities; | |
1004 | ||
1005 | make_rose->neighbour->use++; | |
1006 | ||
1007 | if (rose_sk(sk)->defer) { | |
1008 | make_rose->state = ROSE_STATE_5; | |
1009 | } else { | |
1010 | rose_write_internal(make, ROSE_CALL_ACCEPTED); | |
1011 | make_rose->state = ROSE_STATE_3; | |
1012 | rose_start_idletimer(make); | |
1013 | } | |
1014 | ||
1015 | make_rose->condition = 0x00; | |
1016 | make_rose->vs = 0; | |
1017 | make_rose->va = 0; | |
1018 | make_rose->vr = 0; | |
1019 | make_rose->vl = 0; | |
1020 | sk->sk_ack_backlog++; | |
1021 | ||
1022 | rose_insert_socket(make); | |
1023 | ||
1024 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1025 | ||
1026 | rose_start_heartbeat(make); | |
1027 | ||
1028 | if (!sock_flag(sk, SOCK_DEAD)) | |
1029 | sk->sk_data_ready(sk, skb->len); | |
1030 | ||
1031 | return 1; | |
1032 | } | |
1033 | ||
1034 | static int rose_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1035 | struct msghdr *msg, size_t len) | |
1036 | { | |
1037 | struct sock *sk = sock->sk; | |
1038 | struct rose_sock *rose = rose_sk(sk); | |
1039 | struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name; | |
1040 | int err; | |
1041 | struct full_sockaddr_rose srose; | |
1042 | struct sk_buff *skb; | |
1043 | unsigned char *asmptr; | |
1044 | int n, size, qbit = 0; | |
1045 | ||
1046 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) | |
1047 | return -EINVAL; | |
1048 | ||
1049 | if (sock_flag(sk, SOCK_ZAPPED)) | |
1050 | return -EADDRNOTAVAIL; | |
1051 | ||
1052 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1053 | send_sig(SIGPIPE, current, 0); | |
1054 | return -EPIPE; | |
1055 | } | |
1056 | ||
1057 | if (rose->neighbour == NULL || rose->device == NULL) | |
1058 | return -ENETUNREACH; | |
1059 | ||
1060 | if (usrose != NULL) { | |
1061 | if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose)) | |
1062 | return -EINVAL; | |
1063 | memset(&srose, 0, sizeof(struct full_sockaddr_rose)); | |
1064 | memcpy(&srose, usrose, msg->msg_namelen); | |
1065 | if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 || | |
1066 | ax25cmp(&rose->dest_call, &srose.srose_call) != 0) | |
1067 | return -EISCONN; | |
1068 | if (srose.srose_ndigis != rose->dest_ndigis) | |
1069 | return -EISCONN; | |
1070 | if (srose.srose_ndigis == rose->dest_ndigis) { | |
1071 | for (n = 0 ; n < srose.srose_ndigis ; n++) | |
1072 | if (ax25cmp(&rose->dest_digis[n], | |
1073 | &srose.srose_digis[n])) | |
1074 | return -EISCONN; | |
1075 | } | |
1076 | if (srose.srose_family != AF_ROSE) | |
1077 | return -EINVAL; | |
1078 | } else { | |
1079 | if (sk->sk_state != TCP_ESTABLISHED) | |
1080 | return -ENOTCONN; | |
1081 | ||
1082 | srose.srose_family = AF_ROSE; | |
1083 | srose.srose_addr = rose->dest_addr; | |
1084 | srose.srose_call = rose->dest_call; | |
1085 | srose.srose_ndigis = rose->dest_ndigis; | |
1086 | for (n = 0 ; n < rose->dest_ndigis ; n++) | |
1087 | srose.srose_digis[n] = rose->dest_digis[n]; | |
1088 | } | |
1089 | ||
1090 | SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n"); | |
1091 | ||
1092 | /* Build a packet */ | |
1093 | SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n"); | |
1094 | size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN; | |
1095 | ||
1096 | if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) | |
1097 | return err; | |
1098 | ||
1099 | skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN); | |
1100 | ||
1101 | /* | |
1102 | * Put the data on the end | |
1103 | */ | |
1104 | SOCK_DEBUG(sk, "ROSE: Appending user data\n"); | |
1105 | ||
eeeb0374 ACM |
1106 | skb_reset_transport_header(skb); |
1107 | skb_put(skb, len); | |
1da177e4 | 1108 | |
eeeb0374 | 1109 | err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len); |
1da177e4 LT |
1110 | if (err) { |
1111 | kfree_skb(skb); | |
1112 | return err; | |
1113 | } | |
1114 | ||
1115 | /* | |
1116 | * If the Q BIT Include socket option is in force, the first | |
1117 | * byte of the user data is the logical value of the Q Bit. | |
1118 | */ | |
1119 | if (rose->qbitincl) { | |
1120 | qbit = skb->data[0]; | |
1121 | skb_pull(skb, 1); | |
1122 | } | |
1123 | ||
1124 | /* | |
1125 | * Push down the ROSE header | |
1126 | */ | |
1127 | asmptr = skb_push(skb, ROSE_MIN_LEN); | |
1128 | ||
1129 | SOCK_DEBUG(sk, "ROSE: Building Network Header.\n"); | |
1130 | ||
1131 | /* Build a ROSE Network header */ | |
1132 | asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI; | |
1133 | asmptr[1] = (rose->lci >> 0) & 0xFF; | |
1134 | asmptr[2] = ROSE_DATA; | |
1135 | ||
1136 | if (qbit) | |
1137 | asmptr[0] |= ROSE_Q_BIT; | |
1138 | ||
1139 | SOCK_DEBUG(sk, "ROSE: Built header.\n"); | |
1140 | ||
1141 | SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n"); | |
1142 | ||
1143 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1144 | kfree_skb(skb); | |
1145 | return -ENOTCONN; | |
1146 | } | |
1147 | ||
1148 | #ifdef M_BIT | |
1149 | #define ROSE_PACLEN (256-ROSE_MIN_LEN) | |
1150 | if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) { | |
1151 | unsigned char header[ROSE_MIN_LEN]; | |
1152 | struct sk_buff *skbn; | |
1153 | int frontlen; | |
1154 | int lg; | |
1155 | ||
1156 | /* Save a copy of the Header */ | |
d626f62b | 1157 | skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN); |
1da177e4 LT |
1158 | skb_pull(skb, ROSE_MIN_LEN); |
1159 | ||
1160 | frontlen = skb_headroom(skb); | |
1161 | ||
1162 | while (skb->len > 0) { | |
1163 | if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) { | |
1164 | kfree_skb(skb); | |
1165 | return err; | |
1166 | } | |
1167 | ||
1168 | skbn->sk = sk; | |
1169 | skbn->free = 1; | |
1170 | skbn->arp = 1; | |
1171 | ||
1172 | skb_reserve(skbn, frontlen); | |
1173 | ||
1174 | lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN; | |
1175 | ||
1176 | /* Copy the user data */ | |
d626f62b | 1177 | skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg); |
1da177e4 LT |
1178 | skb_pull(skb, lg); |
1179 | ||
1180 | /* Duplicate the Header */ | |
1181 | skb_push(skbn, ROSE_MIN_LEN); | |
27d7ff46 | 1182 | skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN); |
1da177e4 LT |
1183 | |
1184 | if (skb->len > 0) | |
1185 | skbn->data[2] |= M_BIT; | |
1186 | ||
1187 | skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */ | |
1188 | } | |
1189 | ||
1190 | skb->free = 1; | |
1191 | kfree_skb(skb); | |
1192 | } else { | |
1193 | skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */ | |
1194 | } | |
1195 | #else | |
1196 | skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */ | |
1197 | #endif | |
1198 | ||
1199 | rose_kick(sk); | |
1200 | ||
1201 | return len; | |
1202 | } | |
1203 | ||
1204 | ||
1205 | static int rose_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1206 | struct msghdr *msg, size_t size, int flags) | |
1207 | { | |
1208 | struct sock *sk = sock->sk; | |
1209 | struct rose_sock *rose = rose_sk(sk); | |
1210 | struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name; | |
1211 | size_t copied; | |
1212 | unsigned char *asmptr; | |
1213 | struct sk_buff *skb; | |
1214 | int n, er, qbit; | |
1215 | ||
1216 | /* | |
1217 | * This works for seqpacket too. The receiver has ordered the queue for | |
1218 | * us! We do one quick check first though | |
1219 | */ | |
1220 | if (sk->sk_state != TCP_ESTABLISHED) | |
1221 | return -ENOTCONN; | |
1222 | ||
1223 | /* Now we can treat all alike */ | |
1224 | if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) | |
1225 | return er; | |
1226 | ||
1227 | qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT; | |
1228 | ||
1229 | skb_pull(skb, ROSE_MIN_LEN); | |
1230 | ||
1231 | if (rose->qbitincl) { | |
1232 | asmptr = skb_push(skb, 1); | |
1233 | *asmptr = qbit; | |
1234 | } | |
1235 | ||
badff6d0 | 1236 | skb_reset_transport_header(skb); |
1da177e4 LT |
1237 | copied = skb->len; |
1238 | ||
1239 | if (copied > size) { | |
1240 | copied = size; | |
1241 | msg->msg_flags |= MSG_TRUNC; | |
1242 | } | |
1243 | ||
1244 | skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
1245 | ||
1246 | if (srose != NULL) { | |
1247 | srose->srose_family = AF_ROSE; | |
1248 | srose->srose_addr = rose->dest_addr; | |
1249 | srose->srose_call = rose->dest_call; | |
1250 | srose->srose_ndigis = rose->dest_ndigis; | |
1251 | if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) { | |
1252 | struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name; | |
1253 | for (n = 0 ; n < rose->dest_ndigis ; n++) | |
1254 | full_srose->srose_digis[n] = rose->dest_digis[n]; | |
1255 | msg->msg_namelen = sizeof(struct full_sockaddr_rose); | |
1256 | } else { | |
1257 | if (rose->dest_ndigis >= 1) { | |
1258 | srose->srose_ndigis = 1; | |
1259 | srose->srose_digi = rose->dest_digis[0]; | |
1260 | } | |
1261 | msg->msg_namelen = sizeof(struct sockaddr_rose); | |
1262 | } | |
1263 | } | |
1264 | ||
1265 | skb_free_datagram(sk, skb); | |
1266 | ||
1267 | return copied; | |
1268 | } | |
1269 | ||
1270 | ||
1271 | static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1272 | { | |
1273 | struct sock *sk = sock->sk; | |
1274 | struct rose_sock *rose = rose_sk(sk); | |
1275 | void __user *argp = (void __user *)arg; | |
1276 | ||
1277 | switch (cmd) { | |
1278 | case TIOCOUTQ: { | |
1279 | long amount; | |
1280 | amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); | |
1281 | if (amount < 0) | |
1282 | amount = 0; | |
20b7d10a | 1283 | return put_user(amount, (unsigned int __user *) argp); |
1da177e4 LT |
1284 | } |
1285 | ||
1286 | case TIOCINQ: { | |
1287 | struct sk_buff *skb; | |
1288 | long amount = 0L; | |
1289 | /* These two are safe on a single CPU system as only user tasks fiddle here */ | |
1290 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) | |
1291 | amount = skb->len; | |
20b7d10a | 1292 | return put_user(amount, (unsigned int __user *) argp); |
1da177e4 LT |
1293 | } |
1294 | ||
1295 | case SIOCGSTAMP: | |
20b7d10a | 1296 | return sock_get_timestamp(sk, (struct timeval __user *) argp); |
1da177e4 | 1297 | |
ae40eb1e ED |
1298 | case SIOCGSTAMPNS: |
1299 | return sock_get_timestampns(sk, (struct timespec __user *) argp); | |
1300 | ||
1da177e4 LT |
1301 | case SIOCGIFADDR: |
1302 | case SIOCSIFADDR: | |
1303 | case SIOCGIFDSTADDR: | |
1304 | case SIOCSIFDSTADDR: | |
1305 | case SIOCGIFBRDADDR: | |
1306 | case SIOCSIFBRDADDR: | |
1307 | case SIOCGIFNETMASK: | |
1308 | case SIOCSIFNETMASK: | |
1309 | case SIOCGIFMETRIC: | |
1310 | case SIOCSIFMETRIC: | |
1311 | return -EINVAL; | |
1312 | ||
1313 | case SIOCADDRT: | |
1314 | case SIOCDELRT: | |
1315 | case SIOCRSCLRRT: | |
1316 | if (!capable(CAP_NET_ADMIN)) | |
1317 | return -EPERM; | |
1318 | return rose_rt_ioctl(cmd, argp); | |
1319 | ||
1320 | case SIOCRSGCAUSE: { | |
1321 | struct rose_cause_struct rose_cause; | |
1322 | rose_cause.cause = rose->cause; | |
1323 | rose_cause.diagnostic = rose->diagnostic; | |
1324 | return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0; | |
1325 | } | |
1326 | ||
1327 | case SIOCRSSCAUSE: { | |
1328 | struct rose_cause_struct rose_cause; | |
1329 | if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct))) | |
1330 | return -EFAULT; | |
1331 | rose->cause = rose_cause.cause; | |
1332 | rose->diagnostic = rose_cause.diagnostic; | |
1333 | return 0; | |
1334 | } | |
1335 | ||
1336 | case SIOCRSSL2CALL: | |
1337 | if (!capable(CAP_NET_ADMIN)) return -EPERM; | |
1338 | if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) | |
1339 | ax25_listen_release(&rose_callsign, NULL); | |
1340 | if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address))) | |
1341 | return -EFAULT; | |
1342 | if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) | |
81dcd169 RB |
1343 | return ax25_listen_register(&rose_callsign, NULL); |
1344 | ||
1da177e4 LT |
1345 | return 0; |
1346 | ||
1347 | case SIOCRSGL2CALL: | |
1348 | return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0; | |
1349 | ||
1350 | case SIOCRSACCEPT: | |
1351 | if (rose->state == ROSE_STATE_5) { | |
1352 | rose_write_internal(sk, ROSE_CALL_ACCEPTED); | |
1353 | rose_start_idletimer(sk); | |
1354 | rose->condition = 0x00; | |
1355 | rose->vs = 0; | |
1356 | rose->va = 0; | |
1357 | rose->vr = 0; | |
1358 | rose->vl = 0; | |
1359 | rose->state = ROSE_STATE_3; | |
1360 | } | |
1361 | return 0; | |
1362 | ||
1363 | default: | |
b5e5fa5e | 1364 | return -ENOIOCTLCMD; |
1da177e4 LT |
1365 | } |
1366 | ||
1367 | return 0; | |
1368 | } | |
1369 | ||
1370 | #ifdef CONFIG_PROC_FS | |
1371 | static void *rose_info_start(struct seq_file *seq, loff_t *pos) | |
1372 | { | |
1373 | int i; | |
1374 | struct sock *s; | |
1375 | struct hlist_node *node; | |
1376 | ||
1377 | spin_lock_bh(&rose_list_lock); | |
1378 | if (*pos == 0) | |
1379 | return SEQ_START_TOKEN; | |
3dcf7c5e | 1380 | |
1da177e4 LT |
1381 | i = 1; |
1382 | sk_for_each(s, node, &rose_list) { | |
1383 | if (i == *pos) | |
1384 | return s; | |
1385 | ++i; | |
1386 | } | |
1387 | return NULL; | |
1388 | } | |
1389 | ||
1390 | static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos) | |
1391 | { | |
1392 | ++*pos; | |
1393 | ||
3dcf7c5e | 1394 | return (v == SEQ_START_TOKEN) ? sk_head(&rose_list) |
1da177e4 LT |
1395 | : sk_next((struct sock *)v); |
1396 | } | |
3dcf7c5e | 1397 | |
1da177e4 LT |
1398 | static void rose_info_stop(struct seq_file *seq, void *v) |
1399 | { | |
1400 | spin_unlock_bh(&rose_list_lock); | |
1401 | } | |
1402 | ||
1403 | static int rose_info_show(struct seq_file *seq, void *v) | |
1404 | { | |
f75268cd RB |
1405 | char buf[11]; |
1406 | ||
1da177e4 | 1407 | if (v == SEQ_START_TOKEN) |
3dcf7c5e | 1408 | seq_puts(seq, |
1da177e4 LT |
1409 | "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"); |
1410 | ||
1411 | else { | |
1412 | struct sock *s = v; | |
1413 | struct rose_sock *rose = rose_sk(s); | |
1414 | const char *devname, *callsign; | |
1415 | const struct net_device *dev = rose->device; | |
1416 | ||
1417 | if (!dev) | |
1418 | devname = "???"; | |
1419 | else | |
1420 | devname = dev->name; | |
3dcf7c5e | 1421 | |
1da177e4 LT |
1422 | seq_printf(seq, "%-10s %-9s ", |
1423 | rose2asc(&rose->dest_addr), | |
f75268cd | 1424 | ax2asc(buf, &rose->dest_call)); |
1da177e4 LT |
1425 | |
1426 | if (ax25cmp(&rose->source_call, &null_ax25_address) == 0) | |
1427 | callsign = "??????-?"; | |
1428 | else | |
f75268cd | 1429 | callsign = ax2asc(buf, &rose->source_call); |
1da177e4 LT |
1430 | |
1431 | seq_printf(seq, | |
1432 | "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n", | |
1433 | rose2asc(&rose->source_addr), | |
1434 | callsign, | |
1435 | devname, | |
1436 | rose->lci & 0x0FFF, | |
1437 | (rose->neighbour) ? rose->neighbour->number : 0, | |
1438 | rose->state, | |
1439 | rose->vs, | |
1440 | rose->vr, | |
1441 | rose->va, | |
1442 | ax25_display_timer(&rose->timer) / HZ, | |
1443 | rose->t1 / HZ, | |
1444 | rose->t2 / HZ, | |
1445 | rose->t3 / HZ, | |
1446 | rose->hb / HZ, | |
1447 | ax25_display_timer(&rose->idletimer) / (60 * HZ), | |
1448 | rose->idle / (60 * HZ), | |
1449 | atomic_read(&s->sk_wmem_alloc), | |
1450 | atomic_read(&s->sk_rmem_alloc), | |
1451 | s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); | |
1452 | } | |
1453 | ||
1454 | return 0; | |
1455 | } | |
1456 | ||
56b3d975 | 1457 | static const struct seq_operations rose_info_seqops = { |
1da177e4 LT |
1458 | .start = rose_info_start, |
1459 | .next = rose_info_next, | |
1460 | .stop = rose_info_stop, | |
1461 | .show = rose_info_show, | |
1462 | }; | |
1463 | ||
1464 | static int rose_info_open(struct inode *inode, struct file *file) | |
1465 | { | |
1466 | return seq_open(file, &rose_info_seqops); | |
1467 | } | |
1468 | ||
da7071d7 | 1469 | static const struct file_operations rose_info_fops = { |
1da177e4 LT |
1470 | .owner = THIS_MODULE, |
1471 | .open = rose_info_open, | |
1472 | .read = seq_read, | |
1473 | .llseek = seq_lseek, | |
1474 | .release = seq_release, | |
1475 | }; | |
1476 | #endif /* CONFIG_PROC_FS */ | |
1477 | ||
1478 | static struct net_proto_family rose_family_ops = { | |
1479 | .family = PF_ROSE, | |
1480 | .create = rose_create, | |
1481 | .owner = THIS_MODULE, | |
1482 | }; | |
1483 | ||
1484 | static struct proto_ops rose_proto_ops = { | |
1485 | .family = PF_ROSE, | |
1486 | .owner = THIS_MODULE, | |
1487 | .release = rose_release, | |
1488 | .bind = rose_bind, | |
1489 | .connect = rose_connect, | |
1490 | .socketpair = sock_no_socketpair, | |
1491 | .accept = rose_accept, | |
1492 | .getname = rose_getname, | |
1493 | .poll = datagram_poll, | |
1494 | .ioctl = rose_ioctl, | |
1495 | .listen = rose_listen, | |
1496 | .shutdown = sock_no_shutdown, | |
1497 | .setsockopt = rose_setsockopt, | |
1498 | .getsockopt = rose_getsockopt, | |
1499 | .sendmsg = rose_sendmsg, | |
1500 | .recvmsg = rose_recvmsg, | |
1501 | .mmap = sock_no_mmap, | |
1502 | .sendpage = sock_no_sendpage, | |
1503 | }; | |
1504 | ||
1505 | static struct notifier_block rose_dev_notifier = { | |
1506 | .notifier_call = rose_device_event, | |
1507 | }; | |
1508 | ||
1509 | static struct net_device **dev_rose; | |
1510 | ||
8d5cf596 RB |
1511 | static struct ax25_protocol rose_pid = { |
1512 | .pid = AX25_P_ROSE, | |
1513 | .func = rose_route_frame | |
1514 | }; | |
1515 | ||
a4282717 RB |
1516 | static struct ax25_linkfail rose_linkfail_notifier = { |
1517 | .func = rose_link_failed | |
1518 | }; | |
1519 | ||
1da177e4 LT |
1520 | static int __init rose_proto_init(void) |
1521 | { | |
1522 | int i; | |
a83cd2cc | 1523 | int rc; |
1da177e4 | 1524 | |
a83cd2cc AD |
1525 | if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) { |
1526 | printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n"); | |
1527 | rc = -EINVAL; | |
1528 | goto out; | |
1529 | } | |
1530 | ||
1531 | rc = proto_register(&rose_proto, 0); | |
1da177e4 LT |
1532 | if (rc != 0) |
1533 | goto out; | |
1534 | ||
1535 | rose_callsign = null_ax25_address; | |
1536 | ||
1b30dd35 | 1537 | dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL); |
1da177e4 LT |
1538 | if (dev_rose == NULL) { |
1539 | printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n"); | |
a83cd2cc AD |
1540 | rc = -ENOMEM; |
1541 | goto out_proto_unregister; | |
1da177e4 LT |
1542 | } |
1543 | ||
1da177e4 LT |
1544 | for (i = 0; i < rose_ndevs; i++) { |
1545 | struct net_device *dev; | |
1546 | char name[IFNAMSIZ]; | |
1547 | ||
1548 | sprintf(name, "rose%d", i); | |
3dcf7c5e | 1549 | dev = alloc_netdev(sizeof(struct net_device_stats), |
1da177e4 LT |
1550 | name, rose_setup); |
1551 | if (!dev) { | |
1552 | printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n"); | |
70ff3b66 | 1553 | rc = -ENOMEM; |
1da177e4 LT |
1554 | goto fail; |
1555 | } | |
70ff3b66 AD |
1556 | rc = register_netdev(dev); |
1557 | if (rc) { | |
520d1b83 | 1558 | printk(KERN_ERR "ROSE: netdevice registration failed\n"); |
1da177e4 LT |
1559 | free_netdev(dev); |
1560 | goto fail; | |
1561 | } | |
b1d21ca8 | 1562 | lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key); |
1da177e4 LT |
1563 | dev_rose[i] = dev; |
1564 | } | |
1565 | ||
1566 | sock_register(&rose_family_ops); | |
1567 | register_netdevice_notifier(&rose_dev_notifier); | |
1da177e4 | 1568 | |
8d5cf596 | 1569 | ax25_register_pid(&rose_pid); |
a4282717 | 1570 | ax25_linkfail_register(&rose_linkfail_notifier); |
1da177e4 LT |
1571 | |
1572 | #ifdef CONFIG_SYSCTL | |
1573 | rose_register_sysctl(); | |
1574 | #endif | |
1575 | rose_loopback_init(); | |
1576 | ||
1577 | rose_add_loopback_neigh(); | |
1578 | ||
1579 | proc_net_fops_create("rose", S_IRUGO, &rose_info_fops); | |
1580 | proc_net_fops_create("rose_neigh", S_IRUGO, &rose_neigh_fops); | |
1581 | proc_net_fops_create("rose_nodes", S_IRUGO, &rose_nodes_fops); | |
1582 | proc_net_fops_create("rose_routes", S_IRUGO, &rose_routes_fops); | |
1583 | out: | |
1584 | return rc; | |
1585 | fail: | |
1586 | while (--i >= 0) { | |
1587 | unregister_netdev(dev_rose[i]); | |
1588 | free_netdev(dev_rose[i]); | |
1589 | } | |
1590 | kfree(dev_rose); | |
a83cd2cc | 1591 | out_proto_unregister: |
1da177e4 | 1592 | proto_unregister(&rose_proto); |
70ff3b66 | 1593 | goto out; |
1da177e4 LT |
1594 | } |
1595 | module_init(rose_proto_init); | |
1596 | ||
1597 | module_param(rose_ndevs, int, 0); | |
1598 | MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices"); | |
1599 | ||
1600 | MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); | |
1601 | MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol"); | |
1602 | MODULE_LICENSE("GPL"); | |
1603 | MODULE_ALIAS_NETPROTO(PF_ROSE); | |
1604 | ||
1605 | static void __exit rose_exit(void) | |
1606 | { | |
1607 | int i; | |
1608 | ||
1609 | proc_net_remove("rose"); | |
1610 | proc_net_remove("rose_neigh"); | |
1611 | proc_net_remove("rose_nodes"); | |
1612 | proc_net_remove("rose_routes"); | |
1613 | rose_loopback_clear(); | |
1614 | ||
1615 | rose_rt_free(); | |
1616 | ||
1617 | ax25_protocol_release(AX25_P_ROSE); | |
a4282717 | 1618 | ax25_linkfail_release(&rose_linkfail_notifier); |
1da177e4 LT |
1619 | |
1620 | if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) | |
1621 | ax25_listen_release(&rose_callsign, NULL); | |
1622 | ||
1623 | #ifdef CONFIG_SYSCTL | |
1624 | rose_unregister_sysctl(); | |
1625 | #endif | |
1626 | unregister_netdevice_notifier(&rose_dev_notifier); | |
1627 | ||
1628 | sock_unregister(PF_ROSE); | |
1629 | ||
1630 | for (i = 0; i < rose_ndevs; i++) { | |
1631 | struct net_device *dev = dev_rose[i]; | |
1632 | ||
1633 | if (dev) { | |
1634 | unregister_netdev(dev); | |
1635 | free_netdev(dev); | |
1636 | } | |
1637 | } | |
1638 | ||
1639 | kfree(dev_rose); | |
1640 | proto_unregister(&rose_proto); | |
1641 | } | |
1642 | ||
1643 | module_exit(rose_exit); |