Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * |
4 | * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) | |
5 | * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk) | |
6 | * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net) | |
7 | * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi) | |
8 | */ | |
4fc268d2 | 9 | |
4fc268d2 | 10 | #include <linux/capability.h> |
1da177e4 LT |
11 | #include <linux/module.h> |
12 | #include <linux/moduleparam.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/errno.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/socket.h> | |
17 | #include <linux/in.h> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
1da177e4 | 19 | #include <linux/kernel.h> |
3f07c014 | 20 | #include <linux/sched/signal.h> |
1da177e4 LT |
21 | #include <linux/spinlock.h> |
22 | #include <linux/timer.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/sockios.h> | |
25 | #include <linux/net.h> | |
26 | #include <linux/stat.h> | |
457c4cbc | 27 | #include <net/net_namespace.h> |
1da177e4 LT |
28 | #include <net/ax25.h> |
29 | #include <linux/inet.h> | |
30 | #include <linux/netdevice.h> | |
31 | #include <linux/if_arp.h> | |
32 | #include <linux/skbuff.h> | |
33 | #include <net/sock.h> | |
7c0f6ba6 | 34 | #include <linux/uaccess.h> |
1da177e4 LT |
35 | #include <linux/fcntl.h> |
36 | #include <linux/termios.h> | |
37 | #include <linux/mm.h> | |
38 | #include <linux/interrupt.h> | |
39 | #include <linux/notifier.h> | |
40 | #include <net/rose.h> | |
41 | #include <linux/proc_fs.h> | |
42 | #include <linux/seq_file.h> | |
c752f073 | 43 | #include <net/tcp_states.h> |
1da177e4 LT |
44 | #include <net/ip.h> |
45 | #include <net/arp.h> | |
46 | ||
47 | static int rose_ndevs = 10; | |
48 | ||
49 | int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0; | |
50 | int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1; | |
51 | int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2; | |
52 | int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3; | |
53 | int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE; | |
54 | int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB; | |
55 | int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING; | |
56 | int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT; | |
57 | int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC; | |
58 | int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE; | |
59 | ||
60 | static HLIST_HEAD(rose_list); | |
61 | static DEFINE_SPINLOCK(rose_list_lock); | |
62 | ||
5708e868 | 63 | static const struct proto_ops rose_proto_ops; |
1da177e4 LT |
64 | |
65 | ax25_address rose_callsign; | |
66 | ||
67 | /* | |
68 | * Convert a ROSE address into text. | |
69 | */ | |
dcf777f6 | 70 | char *rose2asc(char *buf, const rose_address *addr) |
1da177e4 | 71 | { |
1da177e4 LT |
72 | if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 && |
73 | addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 && | |
74 | addr->rose_addr[4] == 0x00) { | |
dcf777f6 | 75 | strcpy(buf, "*"); |
1da177e4 | 76 | } else { |
dcf777f6 | 77 | sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF, |
1da177e4 LT |
78 | addr->rose_addr[1] & 0xFF, |
79 | addr->rose_addr[2] & 0xFF, | |
80 | addr->rose_addr[3] & 0xFF, | |
81 | addr->rose_addr[4] & 0xFF); | |
82 | } | |
83 | ||
dcf777f6 | 84 | return buf; |
1da177e4 LT |
85 | } |
86 | ||
87 | /* | |
88 | * Compare two ROSE addresses, 0 == equal. | |
89 | */ | |
90 | int rosecmp(rose_address *addr1, rose_address *addr2) | |
91 | { | |
92 | int i; | |
93 | ||
94 | for (i = 0; i < 5; i++) | |
95 | if (addr1->rose_addr[i] != addr2->rose_addr[i]) | |
96 | return 1; | |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
101 | /* | |
102 | * Compare two ROSE addresses for only mask digits, 0 == equal. | |
103 | */ | |
104 | int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask) | |
105 | { | |
95b7d924 | 106 | unsigned int i, j; |
1da177e4 LT |
107 | |
108 | if (mask > 10) | |
109 | return 1; | |
110 | ||
111 | for (i = 0; i < mask; i++) { | |
112 | j = i / 2; | |
113 | ||
114 | if ((i % 2) != 0) { | |
115 | if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F)) | |
116 | return 1; | |
117 | } else { | |
118 | if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0)) | |
119 | return 1; | |
120 | } | |
121 | } | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
126 | /* | |
127 | * Socket removal during an interrupt is now safe. | |
128 | */ | |
129 | static void rose_remove_socket(struct sock *sk) | |
130 | { | |
131 | spin_lock_bh(&rose_list_lock); | |
132 | sk_del_node_init(sk); | |
133 | spin_unlock_bh(&rose_list_lock); | |
134 | } | |
135 | ||
136 | /* | |
137 | * Kill all bound sockets on a broken link layer connection to a | |
138 | * particular neighbour. | |
139 | */ | |
140 | void rose_kill_by_neigh(struct rose_neigh *neigh) | |
141 | { | |
142 | struct sock *s; | |
1da177e4 LT |
143 | |
144 | spin_lock_bh(&rose_list_lock); | |
b67bfe0d | 145 | sk_for_each(s, &rose_list) { |
1da177e4 LT |
146 | struct rose_sock *rose = rose_sk(s); |
147 | ||
148 | if (rose->neighbour == neigh) { | |
149 | rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); | |
150 | rose->neighbour->use--; | |
151 | rose->neighbour = NULL; | |
152 | } | |
153 | } | |
154 | spin_unlock_bh(&rose_list_lock); | |
155 | } | |
156 | ||
157 | /* | |
158 | * Kill all bound sockets on a dropped device. | |
159 | */ | |
160 | static void rose_kill_by_device(struct net_device *dev) | |
161 | { | |
162 | struct sock *s; | |
1da177e4 LT |
163 | |
164 | spin_lock_bh(&rose_list_lock); | |
b67bfe0d | 165 | sk_for_each(s, &rose_list) { |
1da177e4 LT |
166 | struct rose_sock *rose = rose_sk(s); |
167 | ||
168 | if (rose->device == dev) { | |
169 | rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); | |
d496f784 RB |
170 | if (rose->neighbour) |
171 | rose->neighbour->use--; | |
1da177e4 LT |
172 | rose->device = NULL; |
173 | } | |
174 | } | |
175 | spin_unlock_bh(&rose_list_lock); | |
176 | } | |
177 | ||
178 | /* | |
179 | * Handle device status changes. | |
180 | */ | |
351638e7 JP |
181 | static int rose_device_event(struct notifier_block *this, |
182 | unsigned long event, void *ptr) | |
1da177e4 | 183 | { |
351638e7 | 184 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
1da177e4 | 185 | |
721499e8 | 186 | if (!net_eq(dev_net(dev), &init_net)) |
e9dc8653 EB |
187 | return NOTIFY_DONE; |
188 | ||
1da177e4 LT |
189 | if (event != NETDEV_DOWN) |
190 | return NOTIFY_DONE; | |
191 | ||
192 | switch (dev->type) { | |
193 | case ARPHRD_ROSE: | |
194 | rose_kill_by_device(dev); | |
195 | break; | |
196 | case ARPHRD_AX25: | |
197 | rose_link_device_down(dev); | |
198 | rose_rt_device_down(dev); | |
199 | break; | |
200 | } | |
201 | ||
202 | return NOTIFY_DONE; | |
203 | } | |
204 | ||
205 | /* | |
206 | * Add a socket to the bound sockets list. | |
207 | */ | |
208 | static void rose_insert_socket(struct sock *sk) | |
209 | { | |
210 | ||
211 | spin_lock_bh(&rose_list_lock); | |
212 | sk_add_node(sk, &rose_list); | |
213 | spin_unlock_bh(&rose_list_lock); | |
214 | } | |
215 | ||
216 | /* | |
217 | * Find a socket that wants to accept the Call Request we just | |
218 | * received. | |
219 | */ | |
220 | static struct sock *rose_find_listener(rose_address *addr, ax25_address *call) | |
221 | { | |
222 | struct sock *s; | |
1da177e4 LT |
223 | |
224 | spin_lock_bh(&rose_list_lock); | |
b67bfe0d | 225 | sk_for_each(s, &rose_list) { |
1da177e4 LT |
226 | struct rose_sock *rose = rose_sk(s); |
227 | ||
228 | if (!rosecmp(&rose->source_addr, addr) && | |
229 | !ax25cmp(&rose->source_call, call) && | |
230 | !rose->source_ndigis && s->sk_state == TCP_LISTEN) | |
231 | goto found; | |
232 | } | |
233 | ||
b67bfe0d | 234 | sk_for_each(s, &rose_list) { |
1da177e4 LT |
235 | struct rose_sock *rose = rose_sk(s); |
236 | ||
237 | if (!rosecmp(&rose->source_addr, addr) && | |
238 | !ax25cmp(&rose->source_call, &null_ax25_address) && | |
239 | s->sk_state == TCP_LISTEN) | |
240 | goto found; | |
241 | } | |
242 | s = NULL; | |
243 | found: | |
244 | spin_unlock_bh(&rose_list_lock); | |
245 | return s; | |
246 | } | |
247 | ||
248 | /* | |
249 | * Find a connected ROSE socket given my LCI and device. | |
250 | */ | |
251 | struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh) | |
252 | { | |
253 | struct sock *s; | |
1da177e4 LT |
254 | |
255 | spin_lock_bh(&rose_list_lock); | |
b67bfe0d | 256 | sk_for_each(s, &rose_list) { |
1da177e4 LT |
257 | struct rose_sock *rose = rose_sk(s); |
258 | ||
259 | if (rose->lci == lci && rose->neighbour == neigh) | |
260 | goto found; | |
261 | } | |
262 | s = NULL; | |
263 | found: | |
264 | spin_unlock_bh(&rose_list_lock); | |
265 | return s; | |
266 | } | |
267 | ||
268 | /* | |
269 | * Find a unique LCI for a given device. | |
270 | */ | |
271 | unsigned int rose_new_lci(struct rose_neigh *neigh) | |
272 | { | |
273 | int lci; | |
274 | ||
275 | if (neigh->dce_mode) { | |
276 | for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++) | |
277 | if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) | |
278 | return lci; | |
279 | } else { | |
280 | for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--) | |
281 | if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) | |
282 | return lci; | |
283 | } | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
288 | /* | |
289 | * Deferred destroy. | |
290 | */ | |
291 | void rose_destroy_socket(struct sock *); | |
292 | ||
293 | /* | |
294 | * Handler for deferred kills. | |
295 | */ | |
4966babd | 296 | static void rose_destroy_timer(struct timer_list *t) |
1da177e4 | 297 | { |
4966babd KC |
298 | struct sock *sk = from_timer(sk, t, sk_timer); |
299 | ||
300 | rose_destroy_socket(sk); | |
1da177e4 LT |
301 | } |
302 | ||
303 | /* | |
304 | * This is called from user mode and the timers. Thus it protects itself | |
305 | * against interrupt users but doesn't worry about being called during | |
306 | * work. Once it is removed from the queue no interrupt or bottom half | |
307 | * will touch it and we are (fairly 8-) ) safe. | |
308 | */ | |
309 | void rose_destroy_socket(struct sock *sk) | |
310 | { | |
311 | struct sk_buff *skb; | |
312 | ||
313 | rose_remove_socket(sk); | |
314 | rose_stop_heartbeat(sk); | |
315 | rose_stop_idletimer(sk); | |
316 | rose_stop_timer(sk); | |
317 | ||
318 | rose_clear_queues(sk); /* Flush the queues */ | |
319 | ||
320 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
321 | if (skb->sk != sk) { /* A pending connection */ | |
322 | /* Queue the unaccepted socket for death */ | |
323 | sock_set_flag(skb->sk, SOCK_DEAD); | |
324 | rose_start_heartbeat(skb->sk); | |
325 | rose_sk(skb->sk)->state = ROSE_STATE_0; | |
326 | } | |
327 | ||
328 | kfree_skb(skb); | |
329 | } | |
330 | ||
c564039f | 331 | if (sk_has_allocations(sk)) { |
1da177e4 | 332 | /* Defer: outstanding buffers */ |
4966babd | 333 | timer_setup(&sk->sk_timer, rose_destroy_timer, 0); |
1da177e4 | 334 | sk->sk_timer.expires = jiffies + 10 * HZ; |
1da177e4 LT |
335 | add_timer(&sk->sk_timer); |
336 | } else | |
337 | sock_put(sk); | |
338 | } | |
339 | ||
340 | /* | |
341 | * Handling for system calls applied via the various interfaces to a | |
342 | * ROSE socket object. | |
343 | */ | |
344 | ||
345 | static int rose_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 346 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
347 | { |
348 | struct sock *sk = sock->sk; | |
349 | struct rose_sock *rose = rose_sk(sk); | |
350 | int opt; | |
351 | ||
352 | if (level != SOL_ROSE) | |
353 | return -ENOPROTOOPT; | |
354 | ||
355 | if (optlen < sizeof(int)) | |
356 | return -EINVAL; | |
357 | ||
358 | if (get_user(opt, (int __user *)optval)) | |
359 | return -EFAULT; | |
360 | ||
361 | switch (optname) { | |
362 | case ROSE_DEFER: | |
363 | rose->defer = opt ? 1 : 0; | |
364 | return 0; | |
365 | ||
366 | case ROSE_T1: | |
367 | if (opt < 1) | |
368 | return -EINVAL; | |
369 | rose->t1 = opt * HZ; | |
370 | return 0; | |
371 | ||
372 | case ROSE_T2: | |
373 | if (opt < 1) | |
374 | return -EINVAL; | |
375 | rose->t2 = opt * HZ; | |
376 | return 0; | |
377 | ||
378 | case ROSE_T3: | |
379 | if (opt < 1) | |
380 | return -EINVAL; | |
381 | rose->t3 = opt * HZ; | |
382 | return 0; | |
383 | ||
384 | case ROSE_HOLDBACK: | |
385 | if (opt < 1) | |
386 | return -EINVAL; | |
387 | rose->hb = opt * HZ; | |
388 | return 0; | |
389 | ||
390 | case ROSE_IDLE: | |
391 | if (opt < 0) | |
392 | return -EINVAL; | |
393 | rose->idle = opt * 60 * HZ; | |
394 | return 0; | |
395 | ||
396 | case ROSE_QBITINCL: | |
397 | rose->qbitincl = opt ? 1 : 0; | |
398 | return 0; | |
399 | ||
400 | default: | |
401 | return -ENOPROTOOPT; | |
402 | } | |
403 | } | |
404 | ||
405 | static int rose_getsockopt(struct socket *sock, int level, int optname, | |
406 | char __user *optval, int __user *optlen) | |
407 | { | |
408 | struct sock *sk = sock->sk; | |
409 | struct rose_sock *rose = rose_sk(sk); | |
410 | int val = 0; | |
411 | int len; | |
412 | ||
413 | if (level != SOL_ROSE) | |
414 | return -ENOPROTOOPT; | |
415 | ||
416 | if (get_user(len, optlen)) | |
417 | return -EFAULT; | |
418 | ||
419 | if (len < 0) | |
420 | return -EINVAL; | |
421 | ||
422 | switch (optname) { | |
423 | case ROSE_DEFER: | |
424 | val = rose->defer; | |
425 | break; | |
426 | ||
427 | case ROSE_T1: | |
428 | val = rose->t1 / HZ; | |
429 | break; | |
430 | ||
431 | case ROSE_T2: | |
432 | val = rose->t2 / HZ; | |
433 | break; | |
434 | ||
435 | case ROSE_T3: | |
436 | val = rose->t3 / HZ; | |
437 | break; | |
438 | ||
439 | case ROSE_HOLDBACK: | |
440 | val = rose->hb / HZ; | |
441 | break; | |
442 | ||
443 | case ROSE_IDLE: | |
444 | val = rose->idle / (60 * HZ); | |
445 | break; | |
446 | ||
447 | case ROSE_QBITINCL: | |
448 | val = rose->qbitincl; | |
449 | break; | |
450 | ||
451 | default: | |
452 | return -ENOPROTOOPT; | |
453 | } | |
454 | ||
455 | len = min_t(unsigned int, len, sizeof(int)); | |
456 | ||
457 | if (put_user(len, optlen)) | |
458 | return -EFAULT; | |
459 | ||
460 | return copy_to_user(optval, &val, len) ? -EFAULT : 0; | |
461 | } | |
462 | ||
463 | static int rose_listen(struct socket *sock, int backlog) | |
464 | { | |
465 | struct sock *sk = sock->sk; | |
466 | ||
467 | if (sk->sk_state != TCP_LISTEN) { | |
468 | struct rose_sock *rose = rose_sk(sk); | |
469 | ||
470 | rose->dest_ndigis = 0; | |
471 | memset(&rose->dest_addr, 0, ROSE_ADDR_LEN); | |
472 | memset(&rose->dest_call, 0, AX25_ADDR_LEN); | |
473 | memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS); | |
474 | sk->sk_max_ack_backlog = backlog; | |
475 | sk->sk_state = TCP_LISTEN; | |
476 | return 0; | |
477 | } | |
478 | ||
479 | return -EOPNOTSUPP; | |
480 | } | |
481 | ||
482 | static struct proto rose_proto = { | |
483 | .name = "ROSE", | |
484 | .owner = THIS_MODULE, | |
485 | .obj_size = sizeof(struct rose_sock), | |
486 | }; | |
487 | ||
3f378b68 EP |
488 | static int rose_create(struct net *net, struct socket *sock, int protocol, |
489 | int kern) | |
1da177e4 LT |
490 | { |
491 | struct sock *sk; | |
492 | struct rose_sock *rose; | |
493 | ||
09ad9bc7 | 494 | if (!net_eq(net, &init_net)) |
1b8d7ae4 EB |
495 | return -EAFNOSUPPORT; |
496 | ||
1da177e4 LT |
497 | if (sock->type != SOCK_SEQPACKET || protocol != 0) |
498 | return -ESOCKTNOSUPPORT; | |
499 | ||
11aa9c28 | 500 | sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern); |
6257ff21 | 501 | if (sk == NULL) |
1da177e4 LT |
502 | return -ENOMEM; |
503 | ||
504 | rose = rose_sk(sk); | |
505 | ||
506 | sock_init_data(sock, sk); | |
507 | ||
508 | skb_queue_head_init(&rose->ack_queue); | |
509 | #ifdef M_BIT | |
510 | skb_queue_head_init(&rose->frag_queue); | |
511 | rose->fraglen = 0; | |
512 | #endif | |
513 | ||
514 | sock->ops = &rose_proto_ops; | |
515 | sk->sk_protocol = protocol; | |
516 | ||
4966babd KC |
517 | timer_setup(&rose->timer, NULL, 0); |
518 | timer_setup(&rose->idletimer, NULL, 0); | |
1da177e4 | 519 | |
82e84249 RB |
520 | rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout); |
521 | rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout); | |
522 | rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout); | |
523 | rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout); | |
524 | rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout); | |
1da177e4 LT |
525 | |
526 | rose->state = ROSE_STATE_0; | |
527 | ||
528 | return 0; | |
529 | } | |
530 | ||
531 | static struct sock *rose_make_new(struct sock *osk) | |
532 | { | |
533 | struct sock *sk; | |
534 | struct rose_sock *rose, *orose; | |
535 | ||
536 | if (osk->sk_type != SOCK_SEQPACKET) | |
537 | return NULL; | |
538 | ||
11aa9c28 | 539 | sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0); |
6257ff21 | 540 | if (sk == NULL) |
1da177e4 LT |
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; | |
1da177e4 LT |
554 | sk->sk_priority = osk->sk_priority; |
555 | sk->sk_protocol = osk->sk_protocol; | |
556 | sk->sk_rcvbuf = osk->sk_rcvbuf; | |
557 | sk->sk_sndbuf = osk->sk_sndbuf; | |
558 | sk->sk_state = TCP_ESTABLISHED; | |
53b924b3 | 559 | sock_copy_flags(sk, osk); |
1da177e4 | 560 | |
4966babd KC |
561 | timer_setup(&rose->timer, NULL, 0); |
562 | timer_setup(&rose->idletimer, NULL, 0); | |
1da177e4 LT |
563 | |
564 | orose = rose_sk(osk); | |
565 | rose->t1 = orose->t1; | |
566 | rose->t2 = orose->t2; | |
567 | rose->t3 = orose->t3; | |
568 | rose->hb = orose->hb; | |
569 | rose->idle = orose->idle; | |
570 | rose->defer = orose->defer; | |
571 | rose->device = orose->device; | |
572 | rose->qbitincl = orose->qbitincl; | |
573 | ||
574 | return sk; | |
575 | } | |
576 | ||
577 | static int rose_release(struct socket *sock) | |
578 | { | |
579 | struct sock *sk = sock->sk; | |
580 | struct rose_sock *rose; | |
581 | ||
582 | if (sk == NULL) return 0; | |
583 | ||
4965291a JP |
584 | sock_hold(sk); |
585 | sock_orphan(sk); | |
586 | lock_sock(sk); | |
1da177e4 LT |
587 | rose = rose_sk(sk); |
588 | ||
589 | switch (rose->state) { | |
590 | case ROSE_STATE_0: | |
4965291a | 591 | release_sock(sk); |
1da177e4 | 592 | rose_disconnect(sk, 0, -1, -1); |
4965291a | 593 | lock_sock(sk); |
1da177e4 LT |
594 | rose_destroy_socket(sk); |
595 | break; | |
596 | ||
597 | case ROSE_STATE_2: | |
598 | rose->neighbour->use--; | |
4965291a | 599 | release_sock(sk); |
1da177e4 | 600 | rose_disconnect(sk, 0, -1, -1); |
4965291a | 601 | lock_sock(sk); |
1da177e4 LT |
602 | rose_destroy_socket(sk); |
603 | break; | |
604 | ||
605 | case ROSE_STATE_1: | |
606 | case ROSE_STATE_3: | |
607 | case ROSE_STATE_4: | |
608 | case ROSE_STATE_5: | |
609 | rose_clear_queues(sk); | |
610 | rose_stop_idletimer(sk); | |
611 | rose_write_internal(sk, ROSE_CLEAR_REQUEST); | |
612 | rose_start_t3timer(sk); | |
613 | rose->state = ROSE_STATE_2; | |
614 | sk->sk_state = TCP_CLOSE; | |
615 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
616 | sk->sk_state_change(sk); | |
617 | sock_set_flag(sk, SOCK_DEAD); | |
618 | sock_set_flag(sk, SOCK_DESTROY); | |
619 | break; | |
620 | ||
621 | default: | |
622 | break; | |
623 | } | |
624 | ||
625 | sock->sk = NULL; | |
4965291a JP |
626 | release_sock(sk); |
627 | sock_put(sk); | |
1da177e4 LT |
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 | ||
9828e6e6 | 654 | if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS) |
1da177e4 LT |
655 | return -EINVAL; |
656 | ||
8849b720 | 657 | if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) |
1da177e4 | 658 | return -EADDRNOTAVAIL; |
1da177e4 LT |
659 | |
660 | source = &addr->srose_call; | |
661 | ||
c2a2b8d3 | 662 | user = ax25_findbyuid(current_euid()); |
01d7dd0e RB |
663 | if (user) { |
664 | rose->source_call = user->call; | |
665 | ax25_uid_put(user); | |
666 | } else { | |
3b9c9f3b Y |
667 | if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) { |
668 | dev_put(dev); | |
1da177e4 | 669 | return -EACCES; |
3b9c9f3b | 670 | } |
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); | |
8849b720 | 691 | |
1da177e4 LT |
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 | ||
9828e6e6 | 714 | if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS) |
1da177e4 LT |
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 | 744 | rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, |
fe2c802a | 745 | &diagnostic, 0); |
43837b1e BP |
746 | if (!rose->neighbour) { |
747 | err = -ENETUNREACH; | |
748 | goto out_release; | |
749 | } | |
1da177e4 LT |
750 | |
751 | rose->lci = rose_new_lci(rose->neighbour); | |
2536b94a RB |
752 | if (!rose->lci) { |
753 | err = -ENETUNREACH; | |
754 | goto out_release; | |
755 | } | |
1da177e4 LT |
756 | |
757 | if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ | |
758 | sock_reset_flag(sk, SOCK_ZAPPED); | |
759 | ||
2536b94a RB |
760 | if ((dev = rose_dev_first()) == NULL) { |
761 | err = -ENETUNREACH; | |
762 | goto out_release; | |
763 | } | |
1da177e4 | 764 | |
c2a2b8d3 | 765 | user = ax25_findbyuid(current_euid()); |
2536b94a RB |
766 | if (!user) { |
767 | err = -EINVAL; | |
768 | goto out_release; | |
769 | } | |
1da177e4 LT |
770 | |
771 | memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN); | |
01d7dd0e | 772 | rose->source_call = user->call; |
1da177e4 | 773 | rose->device = dev; |
01d7dd0e | 774 | ax25_uid_put(user); |
1da177e4 LT |
775 | |
776 | rose_insert_socket(sk); /* Finish the bind */ | |
777 | } | |
1da177e4 LT |
778 | rose->dest_addr = addr->srose_addr; |
779 | rose->dest_call = addr->srose_call; | |
780 | rose->rand = ((long)rose & 0xFFFF) + rose->lci; | |
781 | rose->dest_ndigis = addr->srose_ndigis; | |
782 | ||
783 | if (addr_len == sizeof(struct full_sockaddr_rose)) { | |
784 | struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; | |
785 | for (n = 0 ; n < addr->srose_ndigis ; n++) | |
786 | rose->dest_digis[n] = full_addr->srose_digis[n]; | |
787 | } else { | |
788 | if (rose->dest_ndigis == 1) { | |
789 | rose->dest_digis[0] = addr->srose_digi; | |
790 | } | |
791 | } | |
792 | ||
793 | /* Move to connecting socket, start sending Connect Requests */ | |
794 | sock->state = SS_CONNECTING; | |
795 | sk->sk_state = TCP_SYN_SENT; | |
796 | ||
797 | rose->state = ROSE_STATE_1; | |
798 | ||
799 | rose->neighbour->use++; | |
800 | ||
801 | rose_write_internal(sk, ROSE_CALL_REQUEST); | |
802 | rose_start_heartbeat(sk); | |
803 | rose_start_t1timer(sk); | |
804 | ||
805 | /* Now the loop */ | |
2536b94a RB |
806 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { |
807 | err = -EINPROGRESS; | |
808 | goto out_release; | |
809 | } | |
1da177e4 LT |
810 | |
811 | /* | |
812 | * A Connect Ack with Choke or timeout or failed routing will go to | |
813 | * closed. | |
814 | */ | |
815 | if (sk->sk_state == TCP_SYN_SENT) { | |
75606dc6 | 816 | DEFINE_WAIT(wait); |
1da177e4 | 817 | |
1da177e4 | 818 | for (;;) { |
aa395145 | 819 | prepare_to_wait(sk_sleep(sk), &wait, |
6140efb5 | 820 | TASK_INTERRUPTIBLE); |
1da177e4 LT |
821 | if (sk->sk_state != TCP_SYN_SENT) |
822 | break; | |
75606dc6 RB |
823 | if (!signal_pending(current)) { |
824 | release_sock(sk); | |
1da177e4 | 825 | schedule(); |
2536b94a | 826 | lock_sock(sk); |
1da177e4 LT |
827 | continue; |
828 | } | |
75606dc6 RB |
829 | err = -ERESTARTSYS; |
830 | break; | |
1da177e4 | 831 | } |
aa395145 | 832 | finish_wait(sk_sleep(sk), &wait); |
75606dc6 RB |
833 | |
834 | if (err) | |
835 | goto out_release; | |
1da177e4 LT |
836 | } |
837 | ||
838 | if (sk->sk_state != TCP_ESTABLISHED) { | |
839 | sock->state = SS_UNCONNECTED; | |
2536b94a RB |
840 | err = sock_error(sk); /* Always set at this point */ |
841 | goto out_release; | |
1da177e4 LT |
842 | } |
843 | ||
844 | sock->state = SS_CONNECTED; | |
845 | ||
2536b94a RB |
846 | out_release: |
847 | release_sock(sk); | |
848 | ||
849 | return err; | |
1da177e4 LT |
850 | } |
851 | ||
cdfbabfb DH |
852 | static int rose_accept(struct socket *sock, struct socket *newsock, int flags, |
853 | bool kern) | |
1da177e4 | 854 | { |
1da177e4 LT |
855 | struct sk_buff *skb; |
856 | struct sock *newsk; | |
75606dc6 | 857 | DEFINE_WAIT(wait); |
1da177e4 LT |
858 | struct sock *sk; |
859 | int err = 0; | |
860 | ||
861 | if ((sk = sock->sk) == NULL) | |
862 | return -EINVAL; | |
863 | ||
864 | lock_sock(sk); | |
865 | if (sk->sk_type != SOCK_SEQPACKET) { | |
866 | err = -EOPNOTSUPP; | |
75606dc6 | 867 | goto out_release; |
1da177e4 LT |
868 | } |
869 | ||
870 | if (sk->sk_state != TCP_LISTEN) { | |
871 | err = -EINVAL; | |
75606dc6 | 872 | goto out_release; |
1da177e4 LT |
873 | } |
874 | ||
875 | /* | |
876 | * The write queue this time is holding sockets ready to use | |
877 | * hooked into the SABM we saved | |
878 | */ | |
1da177e4 | 879 | for (;;) { |
aa395145 | 880 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
75606dc6 | 881 | |
1da177e4 LT |
882 | skb = skb_dequeue(&sk->sk_receive_queue); |
883 | if (skb) | |
884 | break; | |
885 | ||
1da177e4 | 886 | if (flags & O_NONBLOCK) { |
75606dc6 RB |
887 | err = -EWOULDBLOCK; |
888 | break; | |
1da177e4 | 889 | } |
75606dc6 RB |
890 | if (!signal_pending(current)) { |
891 | release_sock(sk); | |
1da177e4 LT |
892 | schedule(); |
893 | lock_sock(sk); | |
894 | continue; | |
895 | } | |
75606dc6 RB |
896 | err = -ERESTARTSYS; |
897 | break; | |
1da177e4 | 898 | } |
aa395145 | 899 | finish_wait(sk_sleep(sk), &wait); |
75606dc6 RB |
900 | if (err) |
901 | goto out_release; | |
1da177e4 LT |
902 | |
903 | newsk = skb->sk; | |
44ccff1f | 904 | sock_graft(newsk, newsock); |
1da177e4 LT |
905 | |
906 | /* Now attach up the new socket */ | |
907 | skb->sk = NULL; | |
908 | kfree_skb(skb); | |
7976a11b | 909 | sk_acceptq_removed(sk); |
1da177e4 | 910 | |
75606dc6 | 911 | out_release: |
1da177e4 LT |
912 | release_sock(sk); |
913 | ||
914 | return err; | |
915 | } | |
916 | ||
917 | static int rose_getname(struct socket *sock, struct sockaddr *uaddr, | |
9b2c45d4 | 918 | int peer) |
1da177e4 LT |
919 | { |
920 | struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr; | |
921 | struct sock *sk = sock->sk; | |
922 | struct rose_sock *rose = rose_sk(sk); | |
923 | int n; | |
924 | ||
17ac2e9c | 925 | memset(srose, 0, sizeof(*srose)); |
1da177e4 LT |
926 | if (peer != 0) { |
927 | if (sk->sk_state != TCP_ESTABLISHED) | |
928 | return -ENOTCONN; | |
929 | srose->srose_family = AF_ROSE; | |
930 | srose->srose_addr = rose->dest_addr; | |
931 | srose->srose_call = rose->dest_call; | |
932 | srose->srose_ndigis = rose->dest_ndigis; | |
933 | for (n = 0; n < rose->dest_ndigis; n++) | |
934 | srose->srose_digis[n] = rose->dest_digis[n]; | |
935 | } else { | |
936 | srose->srose_family = AF_ROSE; | |
937 | srose->srose_addr = rose->source_addr; | |
938 | srose->srose_call = rose->source_call; | |
939 | srose->srose_ndigis = rose->source_ndigis; | |
940 | for (n = 0; n < rose->source_ndigis; n++) | |
941 | srose->srose_digis[n] = rose->source_digis[n]; | |
942 | } | |
943 | ||
9b2c45d4 | 944 | return sizeof(struct full_sockaddr_rose); |
1da177e4 LT |
945 | } |
946 | ||
947 | int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci) | |
948 | { | |
949 | struct sock *sk; | |
950 | struct sock *make; | |
951 | struct rose_sock *make_rose; | |
952 | struct rose_facilities_struct facilities; | |
e0bccd31 | 953 | int n; |
1da177e4 LT |
954 | |
955 | skb->sk = NULL; /* Initially we don't know who it's for */ | |
956 | ||
957 | /* | |
958 | * skb->data points to the rose frame start | |
959 | */ | |
960 | memset(&facilities, 0x00, sizeof(struct rose_facilities_struct)); | |
961 | ||
e0bccd31 BH |
962 | if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF, |
963 | skb->len - ROSE_CALL_REQ_FACILITIES_OFF, | |
964 | &facilities)) { | |
1da177e4 LT |
965 | rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76); |
966 | return 0; | |
967 | } | |
968 | ||
969 | sk = rose_find_listener(&facilities.source_addr, &facilities.source_call); | |
970 | ||
971 | /* | |
972 | * We can't accept the Call Request. | |
973 | */ | |
974 | if (sk == NULL || sk_acceptq_is_full(sk) || | |
975 | (make = rose_make_new(sk)) == NULL) { | |
976 | rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120); | |
977 | return 0; | |
978 | } | |
979 | ||
980 | skb->sk = make; | |
981 | make->sk_state = TCP_ESTABLISHED; | |
982 | make_rose = rose_sk(make); | |
983 | ||
984 | make_rose->lci = lci; | |
985 | make_rose->dest_addr = facilities.dest_addr; | |
986 | make_rose->dest_call = facilities.dest_call; | |
987 | make_rose->dest_ndigis = facilities.dest_ndigis; | |
988 | for (n = 0 ; n < facilities.dest_ndigis ; n++) | |
989 | make_rose->dest_digis[n] = facilities.dest_digis[n]; | |
990 | make_rose->source_addr = facilities.source_addr; | |
991 | make_rose->source_call = facilities.source_call; | |
992 | make_rose->source_ndigis = facilities.source_ndigis; | |
993 | for (n = 0 ; n < facilities.source_ndigis ; n++) | |
db34de93 | 994 | make_rose->source_digis[n] = facilities.source_digis[n]; |
1da177e4 LT |
995 | make_rose->neighbour = neigh; |
996 | make_rose->device = dev; | |
997 | make_rose->facilities = facilities; | |
998 | ||
999 | make_rose->neighbour->use++; | |
1000 | ||
1001 | if (rose_sk(sk)->defer) { | |
1002 | make_rose->state = ROSE_STATE_5; | |
1003 | } else { | |
1004 | rose_write_internal(make, ROSE_CALL_ACCEPTED); | |
1005 | make_rose->state = ROSE_STATE_3; | |
1006 | rose_start_idletimer(make); | |
1007 | } | |
1008 | ||
1009 | make_rose->condition = 0x00; | |
1010 | make_rose->vs = 0; | |
1011 | make_rose->va = 0; | |
1012 | make_rose->vr = 0; | |
1013 | make_rose->vl = 0; | |
7976a11b | 1014 | sk_acceptq_added(sk); |
1da177e4 LT |
1015 | |
1016 | rose_insert_socket(make); | |
1017 | ||
1018 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1019 | ||
1020 | rose_start_heartbeat(make); | |
1021 | ||
1022 | if (!sock_flag(sk, SOCK_DEAD)) | |
676d2369 | 1023 | sk->sk_data_ready(sk); |
1da177e4 LT |
1024 | |
1025 | return 1; | |
1026 | } | |
1027 | ||
1b784140 | 1028 | static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) |
1da177e4 LT |
1029 | { |
1030 | struct sock *sk = sock->sk; | |
1031 | struct rose_sock *rose = rose_sk(sk); | |
342dfc30 | 1032 | DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name); |
1da177e4 LT |
1033 | int err; |
1034 | struct full_sockaddr_rose srose; | |
1035 | struct sk_buff *skb; | |
1036 | unsigned char *asmptr; | |
1037 | int n, size, qbit = 0; | |
1038 | ||
1039 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) | |
1040 | return -EINVAL; | |
1041 | ||
1042 | if (sock_flag(sk, SOCK_ZAPPED)) | |
1043 | return -EADDRNOTAVAIL; | |
1044 | ||
1045 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1046 | send_sig(SIGPIPE, current, 0); | |
1047 | return -EPIPE; | |
1048 | } | |
1049 | ||
1050 | if (rose->neighbour == NULL || rose->device == NULL) | |
1051 | return -ENETUNREACH; | |
1052 | ||
1053 | if (usrose != NULL) { | |
1054 | if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose)) | |
1055 | return -EINVAL; | |
1056 | memset(&srose, 0, sizeof(struct full_sockaddr_rose)); | |
1057 | memcpy(&srose, usrose, msg->msg_namelen); | |
1058 | if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 || | |
1059 | ax25cmp(&rose->dest_call, &srose.srose_call) != 0) | |
1060 | return -EISCONN; | |
1061 | if (srose.srose_ndigis != rose->dest_ndigis) | |
1062 | return -EISCONN; | |
1063 | if (srose.srose_ndigis == rose->dest_ndigis) { | |
1064 | for (n = 0 ; n < srose.srose_ndigis ; n++) | |
1065 | if (ax25cmp(&rose->dest_digis[n], | |
1066 | &srose.srose_digis[n])) | |
1067 | return -EISCONN; | |
1068 | } | |
1069 | if (srose.srose_family != AF_ROSE) | |
1070 | return -EINVAL; | |
1071 | } else { | |
1072 | if (sk->sk_state != TCP_ESTABLISHED) | |
1073 | return -ENOTCONN; | |
1074 | ||
1075 | srose.srose_family = AF_ROSE; | |
1076 | srose.srose_addr = rose->dest_addr; | |
1077 | srose.srose_call = rose->dest_call; | |
1078 | srose.srose_ndigis = rose->dest_ndigis; | |
1079 | for (n = 0 ; n < rose->dest_ndigis ; n++) | |
1080 | srose.srose_digis[n] = rose->dest_digis[n]; | |
1081 | } | |
1082 | ||
1da177e4 | 1083 | /* Build a packet */ |
83e0bbcb AC |
1084 | /* Sanity check the packet size */ |
1085 | if (len > 65535) | |
1086 | return -EMSGSIZE; | |
1087 | ||
1da177e4 LT |
1088 | size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN; |
1089 | ||
1090 | if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) | |
1091 | return err; | |
1092 | ||
1093 | skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN); | |
1094 | ||
1095 | /* | |
1096 | * Put the data on the end | |
1097 | */ | |
1da177e4 | 1098 | |
eeeb0374 ACM |
1099 | skb_reset_transport_header(skb); |
1100 | skb_put(skb, len); | |
1da177e4 | 1101 | |
6ce8e9ce | 1102 | err = memcpy_from_msg(skb_transport_header(skb), msg, len); |
1da177e4 LT |
1103 | if (err) { |
1104 | kfree_skb(skb); | |
1105 | return err; | |
1106 | } | |
1107 | ||
1108 | /* | |
1109 | * If the Q BIT Include socket option is in force, the first | |
1110 | * byte of the user data is the logical value of the Q Bit. | |
1111 | */ | |
1112 | if (rose->qbitincl) { | |
1113 | qbit = skb->data[0]; | |
1114 | skb_pull(skb, 1); | |
1115 | } | |
1116 | ||
1117 | /* | |
1118 | * Push down the ROSE header | |
1119 | */ | |
1120 | asmptr = skb_push(skb, ROSE_MIN_LEN); | |
1121 | ||
1da177e4 LT |
1122 | /* Build a ROSE Network header */ |
1123 | asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI; | |
1124 | asmptr[1] = (rose->lci >> 0) & 0xFF; | |
1125 | asmptr[2] = ROSE_DATA; | |
1126 | ||
1127 | if (qbit) | |
1128 | asmptr[0] |= ROSE_Q_BIT; | |
1129 | ||
1da177e4 LT |
1130 | if (sk->sk_state != TCP_ESTABLISHED) { |
1131 | kfree_skb(skb); | |
1132 | return -ENOTCONN; | |
1133 | } | |
1134 | ||
1135 | #ifdef M_BIT | |
1136 | #define ROSE_PACLEN (256-ROSE_MIN_LEN) | |
1137 | if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) { | |
1138 | unsigned char header[ROSE_MIN_LEN]; | |
1139 | struct sk_buff *skbn; | |
1140 | int frontlen; | |
1141 | int lg; | |
1142 | ||
1143 | /* Save a copy of the Header */ | |
d626f62b | 1144 | skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN); |
1da177e4 LT |
1145 | skb_pull(skb, ROSE_MIN_LEN); |
1146 | ||
1147 | frontlen = skb_headroom(skb); | |
1148 | ||
1149 | while (skb->len > 0) { | |
1150 | if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) { | |
1151 | kfree_skb(skb); | |
1152 | return err; | |
1153 | } | |
1154 | ||
1155 | skbn->sk = sk; | |
1156 | skbn->free = 1; | |
1157 | skbn->arp = 1; | |
1158 | ||
1159 | skb_reserve(skbn, frontlen); | |
1160 | ||
1161 | lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN; | |
1162 | ||
1163 | /* Copy the user data */ | |
d626f62b | 1164 | skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg); |
1da177e4 LT |
1165 | skb_pull(skb, lg); |
1166 | ||
1167 | /* Duplicate the Header */ | |
1168 | skb_push(skbn, ROSE_MIN_LEN); | |
27d7ff46 | 1169 | skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN); |
1da177e4 LT |
1170 | |
1171 | if (skb->len > 0) | |
1172 | skbn->data[2] |= M_BIT; | |
1173 | ||
1174 | skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */ | |
1175 | } | |
1176 | ||
1177 | skb->free = 1; | |
1178 | kfree_skb(skb); | |
1179 | } else { | |
1180 | skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */ | |
1181 | } | |
1182 | #else | |
1183 | skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */ | |
1184 | #endif | |
1185 | ||
1186 | rose_kick(sk); | |
1187 | ||
1188 | return len; | |
1189 | } | |
1190 | ||
1191 | ||
1b784140 YX |
1192 | static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, |
1193 | int flags) | |
1da177e4 LT |
1194 | { |
1195 | struct sock *sk = sock->sk; | |
1196 | struct rose_sock *rose = rose_sk(sk); | |
1da177e4 LT |
1197 | size_t copied; |
1198 | unsigned char *asmptr; | |
1199 | struct sk_buff *skb; | |
1200 | int n, er, qbit; | |
1201 | ||
1202 | /* | |
1203 | * This works for seqpacket too. The receiver has ordered the queue for | |
1204 | * us! We do one quick check first though | |
1205 | */ | |
1206 | if (sk->sk_state != TCP_ESTABLISHED) | |
1207 | return -ENOTCONN; | |
1208 | ||
1209 | /* Now we can treat all alike */ | |
1210 | if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) | |
1211 | return er; | |
1212 | ||
1213 | qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT; | |
1214 | ||
1215 | skb_pull(skb, ROSE_MIN_LEN); | |
1216 | ||
1217 | if (rose->qbitincl) { | |
1218 | asmptr = skb_push(skb, 1); | |
1219 | *asmptr = qbit; | |
1220 | } | |
1221 | ||
badff6d0 | 1222 | skb_reset_transport_header(skb); |
1da177e4 LT |
1223 | copied = skb->len; |
1224 | ||
1225 | if (copied > size) { | |
1226 | copied = size; | |
1227 | msg->msg_flags |= MSG_TRUNC; | |
1228 | } | |
1229 | ||
51f3d02b | 1230 | skb_copy_datagram_msg(skb, 0, msg, copied); |
1da177e4 | 1231 | |
f3d33426 HFS |
1232 | if (msg->msg_name) { |
1233 | struct sockaddr_rose *srose; | |
342dfc30 SH |
1234 | DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose, |
1235 | msg->msg_name); | |
f3d33426 HFS |
1236 | |
1237 | memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose)); | |
1238 | srose = msg->msg_name; | |
1da177e4 LT |
1239 | srose->srose_family = AF_ROSE; |
1240 | srose->srose_addr = rose->dest_addr; | |
1241 | srose->srose_call = rose->dest_call; | |
1242 | srose->srose_ndigis = rose->dest_ndigis; | |
f81152e3 FW |
1243 | for (n = 0 ; n < rose->dest_ndigis ; n++) |
1244 | full_srose->srose_digis[n] = rose->dest_digis[n]; | |
1245 | msg->msg_namelen = sizeof(struct full_sockaddr_rose); | |
1da177e4 LT |
1246 | } |
1247 | ||
1248 | skb_free_datagram(sk, skb); | |
1249 | ||
1250 | return copied; | |
1251 | } | |
1252 | ||
1253 | ||
1254 | static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1255 | { | |
1256 | struct sock *sk = sock->sk; | |
1257 | struct rose_sock *rose = rose_sk(sk); | |
1258 | void __user *argp = (void __user *)arg; | |
1259 | ||
1260 | switch (cmd) { | |
1261 | case TIOCOUTQ: { | |
1262 | long amount; | |
31e6d363 ED |
1263 | |
1264 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); | |
1da177e4 LT |
1265 | if (amount < 0) |
1266 | amount = 0; | |
20b7d10a | 1267 | return put_user(amount, (unsigned int __user *) argp); |
1da177e4 LT |
1268 | } |
1269 | ||
1270 | case TIOCINQ: { | |
1271 | struct sk_buff *skb; | |
1272 | long amount = 0L; | |
1273 | /* These two are safe on a single CPU system as only user tasks fiddle here */ | |
1274 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) | |
1275 | amount = skb->len; | |
20b7d10a | 1276 | return put_user(amount, (unsigned int __user *) argp); |
1da177e4 LT |
1277 | } |
1278 | ||
1da177e4 LT |
1279 | case SIOCGIFADDR: |
1280 | case SIOCSIFADDR: | |
1281 | case SIOCGIFDSTADDR: | |
1282 | case SIOCSIFDSTADDR: | |
1283 | case SIOCGIFBRDADDR: | |
1284 | case SIOCSIFBRDADDR: | |
1285 | case SIOCGIFNETMASK: | |
1286 | case SIOCSIFNETMASK: | |
1287 | case SIOCGIFMETRIC: | |
1288 | case SIOCSIFMETRIC: | |
1289 | return -EINVAL; | |
1290 | ||
1291 | case SIOCADDRT: | |
1292 | case SIOCDELRT: | |
1293 | case SIOCRSCLRRT: | |
1294 | if (!capable(CAP_NET_ADMIN)) | |
1295 | return -EPERM; | |
1296 | return rose_rt_ioctl(cmd, argp); | |
1297 | ||
1298 | case SIOCRSGCAUSE: { | |
1299 | struct rose_cause_struct rose_cause; | |
1300 | rose_cause.cause = rose->cause; | |
1301 | rose_cause.diagnostic = rose->diagnostic; | |
1302 | return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0; | |
1303 | } | |
1304 | ||
1305 | case SIOCRSSCAUSE: { | |
1306 | struct rose_cause_struct rose_cause; | |
1307 | if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct))) | |
1308 | return -EFAULT; | |
1309 | rose->cause = rose_cause.cause; | |
1310 | rose->diagnostic = rose_cause.diagnostic; | |
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | case SIOCRSSL2CALL: | |
1315 | if (!capable(CAP_NET_ADMIN)) return -EPERM; | |
1316 | if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) | |
1317 | ax25_listen_release(&rose_callsign, NULL); | |
1318 | if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address))) | |
1319 | return -EFAULT; | |
1320 | if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) | |
81dcd169 RB |
1321 | return ax25_listen_register(&rose_callsign, NULL); |
1322 | ||
1da177e4 LT |
1323 | return 0; |
1324 | ||
1325 | case SIOCRSGL2CALL: | |
1326 | return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0; | |
1327 | ||
1328 | case SIOCRSACCEPT: | |
1329 | if (rose->state == ROSE_STATE_5) { | |
1330 | rose_write_internal(sk, ROSE_CALL_ACCEPTED); | |
1331 | rose_start_idletimer(sk); | |
1332 | rose->condition = 0x00; | |
1333 | rose->vs = 0; | |
1334 | rose->va = 0; | |
1335 | rose->vr = 0; | |
1336 | rose->vl = 0; | |
1337 | rose->state = ROSE_STATE_3; | |
1338 | } | |
1339 | return 0; | |
1340 | ||
1341 | default: | |
b5e5fa5e | 1342 | return -ENOIOCTLCMD; |
1da177e4 LT |
1343 | } |
1344 | ||
1345 | return 0; | |
1346 | } | |
1347 | ||
1348 | #ifdef CONFIG_PROC_FS | |
1349 | static void *rose_info_start(struct seq_file *seq, loff_t *pos) | |
95b7d924 | 1350 | __acquires(rose_list_lock) |
1da177e4 | 1351 | { |
1da177e4 | 1352 | spin_lock_bh(&rose_list_lock); |
b999748a | 1353 | return seq_hlist_start_head(&rose_list, *pos); |
1da177e4 LT |
1354 | } |
1355 | ||
1356 | static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos) | |
1357 | { | |
b999748a | 1358 | return seq_hlist_next(v, &rose_list, pos); |
1da177e4 | 1359 | } |
3dcf7c5e | 1360 | |
1da177e4 | 1361 | static void rose_info_stop(struct seq_file *seq, void *v) |
95b7d924 | 1362 | __releases(rose_list_lock) |
1da177e4 LT |
1363 | { |
1364 | spin_unlock_bh(&rose_list_lock); | |
1365 | } | |
1366 | ||
1367 | static int rose_info_show(struct seq_file *seq, void *v) | |
1368 | { | |
dcf777f6 | 1369 | char buf[11], rsbuf[11]; |
f75268cd | 1370 | |
1da177e4 | 1371 | if (v == SEQ_START_TOKEN) |
3dcf7c5e | 1372 | seq_puts(seq, |
1da177e4 LT |
1373 | "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"); |
1374 | ||
1375 | else { | |
b999748a | 1376 | struct sock *s = sk_entry(v); |
1da177e4 LT |
1377 | struct rose_sock *rose = rose_sk(s); |
1378 | const char *devname, *callsign; | |
1379 | const struct net_device *dev = rose->device; | |
1380 | ||
1381 | if (!dev) | |
1382 | devname = "???"; | |
1383 | else | |
1384 | devname = dev->name; | |
3dcf7c5e | 1385 | |
1da177e4 | 1386 | seq_printf(seq, "%-10s %-9s ", |
dcf777f6 RB |
1387 | rose2asc(rsbuf, &rose->dest_addr), |
1388 | ax2asc(buf, &rose->dest_call)); | |
1da177e4 LT |
1389 | |
1390 | if (ax25cmp(&rose->source_call, &null_ax25_address) == 0) | |
1391 | callsign = "??????-?"; | |
1392 | else | |
f75268cd | 1393 | callsign = ax2asc(buf, &rose->source_call); |
1da177e4 LT |
1394 | |
1395 | seq_printf(seq, | |
1396 | "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n", | |
dcf777f6 | 1397 | rose2asc(rsbuf, &rose->source_addr), |
1da177e4 LT |
1398 | callsign, |
1399 | devname, | |
1400 | rose->lci & 0x0FFF, | |
1401 | (rose->neighbour) ? rose->neighbour->number : 0, | |
1402 | rose->state, | |
1403 | rose->vs, | |
1404 | rose->vr, | |
1405 | rose->va, | |
1406 | ax25_display_timer(&rose->timer) / HZ, | |
1407 | rose->t1 / HZ, | |
1408 | rose->t2 / HZ, | |
1409 | rose->t3 / HZ, | |
1410 | rose->hb / HZ, | |
1411 | ax25_display_timer(&rose->idletimer) / (60 * HZ), | |
1412 | rose->idle / (60 * HZ), | |
31e6d363 ED |
1413 | sk_wmem_alloc_get(s), |
1414 | sk_rmem_alloc_get(s), | |
1da177e4 LT |
1415 | s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); |
1416 | } | |
1417 | ||
1418 | return 0; | |
1419 | } | |
1420 | ||
56b3d975 | 1421 | static const struct seq_operations rose_info_seqops = { |
1da177e4 LT |
1422 | .start = rose_info_start, |
1423 | .next = rose_info_next, | |
1424 | .stop = rose_info_stop, | |
1425 | .show = rose_info_show, | |
1426 | }; | |
1da177e4 LT |
1427 | #endif /* CONFIG_PROC_FS */ |
1428 | ||
ec1b4cf7 | 1429 | static const struct net_proto_family rose_family_ops = { |
1da177e4 LT |
1430 | .family = PF_ROSE, |
1431 | .create = rose_create, | |
1432 | .owner = THIS_MODULE, | |
1433 | }; | |
1434 | ||
5708e868 | 1435 | static const struct proto_ops rose_proto_ops = { |
1da177e4 LT |
1436 | .family = PF_ROSE, |
1437 | .owner = THIS_MODULE, | |
1438 | .release = rose_release, | |
1439 | .bind = rose_bind, | |
1440 | .connect = rose_connect, | |
1441 | .socketpair = sock_no_socketpair, | |
1442 | .accept = rose_accept, | |
1443 | .getname = rose_getname, | |
a11e1d43 | 1444 | .poll = datagram_poll, |
1da177e4 | 1445 | .ioctl = rose_ioctl, |
c7cbdbf2 | 1446 | .gettstamp = sock_gettstamp, |
1da177e4 LT |
1447 | .listen = rose_listen, |
1448 | .shutdown = sock_no_shutdown, | |
1449 | .setsockopt = rose_setsockopt, | |
1450 | .getsockopt = rose_getsockopt, | |
1451 | .sendmsg = rose_sendmsg, | |
1452 | .recvmsg = rose_recvmsg, | |
1453 | .mmap = sock_no_mmap, | |
1454 | .sendpage = sock_no_sendpage, | |
1455 | }; | |
1456 | ||
1457 | static struct notifier_block rose_dev_notifier = { | |
1458 | .notifier_call = rose_device_event, | |
1459 | }; | |
1460 | ||
1461 | static struct net_device **dev_rose; | |
1462 | ||
8d5cf596 RB |
1463 | static struct ax25_protocol rose_pid = { |
1464 | .pid = AX25_P_ROSE, | |
1465 | .func = rose_route_frame | |
1466 | }; | |
1467 | ||
a4282717 RB |
1468 | static struct ax25_linkfail rose_linkfail_notifier = { |
1469 | .func = rose_link_failed | |
1470 | }; | |
1471 | ||
1da177e4 LT |
1472 | static int __init rose_proto_init(void) |
1473 | { | |
1474 | int i; | |
a83cd2cc | 1475 | int rc; |
1da177e4 | 1476 | |
a83cd2cc | 1477 | if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) { |
4d299f18 | 1478 | printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter too large\n"); |
a83cd2cc AD |
1479 | rc = -EINVAL; |
1480 | goto out; | |
1481 | } | |
1482 | ||
1483 | rc = proto_register(&rose_proto, 0); | |
1da177e4 LT |
1484 | if (rc != 0) |
1485 | goto out; | |
1486 | ||
1487 | rose_callsign = null_ax25_address; | |
1488 | ||
6396bb22 KC |
1489 | dev_rose = kcalloc(rose_ndevs, sizeof(struct net_device *), |
1490 | GFP_KERNEL); | |
1da177e4 LT |
1491 | if (dev_rose == NULL) { |
1492 | printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n"); | |
a83cd2cc AD |
1493 | rc = -ENOMEM; |
1494 | goto out_proto_unregister; | |
1da177e4 LT |
1495 | } |
1496 | ||
1da177e4 LT |
1497 | for (i = 0; i < rose_ndevs; i++) { |
1498 | struct net_device *dev; | |
1499 | char name[IFNAMSIZ]; | |
1500 | ||
1501 | sprintf(name, "rose%d", i); | |
c835a677 | 1502 | dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup); |
1da177e4 LT |
1503 | if (!dev) { |
1504 | printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n"); | |
70ff3b66 | 1505 | rc = -ENOMEM; |
1da177e4 LT |
1506 | goto fail; |
1507 | } | |
70ff3b66 AD |
1508 | rc = register_netdev(dev); |
1509 | if (rc) { | |
520d1b83 | 1510 | printk(KERN_ERR "ROSE: netdevice registration failed\n"); |
1da177e4 LT |
1511 | free_netdev(dev); |
1512 | goto fail; | |
1513 | } | |
1514 | dev_rose[i] = dev; | |
1515 | } | |
1516 | ||
1517 | sock_register(&rose_family_ops); | |
1518 | register_netdevice_notifier(&rose_dev_notifier); | |
1da177e4 | 1519 | |
8d5cf596 | 1520 | ax25_register_pid(&rose_pid); |
a4282717 | 1521 | ax25_linkfail_register(&rose_linkfail_notifier); |
1da177e4 LT |
1522 | |
1523 | #ifdef CONFIG_SYSCTL | |
1524 | rose_register_sysctl(); | |
1525 | #endif | |
1526 | rose_loopback_init(); | |
1527 | ||
1528 | rose_add_loopback_neigh(); | |
1529 | ||
fddda2b7 CH |
1530 | proc_create_seq("rose", 0444, init_net.proc_net, &rose_info_seqops); |
1531 | proc_create_seq("rose_neigh", 0444, init_net.proc_net, | |
1532 | &rose_neigh_seqops); | |
1533 | proc_create_seq("rose_nodes", 0444, init_net.proc_net, | |
1534 | &rose_node_seqops); | |
1535 | proc_create_seq("rose_routes", 0444, init_net.proc_net, | |
1536 | &rose_route_seqops); | |
1da177e4 LT |
1537 | out: |
1538 | return rc; | |
1539 | fail: | |
1540 | while (--i >= 0) { | |
1541 | unregister_netdev(dev_rose[i]); | |
1542 | free_netdev(dev_rose[i]); | |
1543 | } | |
1544 | kfree(dev_rose); | |
a83cd2cc | 1545 | out_proto_unregister: |
1da177e4 | 1546 | proto_unregister(&rose_proto); |
70ff3b66 | 1547 | goto out; |
1da177e4 LT |
1548 | } |
1549 | module_init(rose_proto_init); | |
1550 | ||
1551 | module_param(rose_ndevs, int, 0); | |
1552 | MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices"); | |
1553 | ||
1554 | MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); | |
1555 | MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol"); | |
1556 | MODULE_LICENSE("GPL"); | |
1557 | MODULE_ALIAS_NETPROTO(PF_ROSE); | |
1558 | ||
1559 | static void __exit rose_exit(void) | |
1560 | { | |
1561 | int i; | |
1562 | ||
ece31ffd G |
1563 | remove_proc_entry("rose", init_net.proc_net); |
1564 | remove_proc_entry("rose_neigh", init_net.proc_net); | |
1565 | remove_proc_entry("rose_nodes", init_net.proc_net); | |
1566 | remove_proc_entry("rose_routes", init_net.proc_net); | |
1da177e4 LT |
1567 | rose_loopback_clear(); |
1568 | ||
1569 | rose_rt_free(); | |
1570 | ||
1571 | ax25_protocol_release(AX25_P_ROSE); | |
a4282717 | 1572 | ax25_linkfail_release(&rose_linkfail_notifier); |
1da177e4 LT |
1573 | |
1574 | if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) | |
1575 | ax25_listen_release(&rose_callsign, NULL); | |
1576 | ||
1577 | #ifdef CONFIG_SYSCTL | |
1578 | rose_unregister_sysctl(); | |
1579 | #endif | |
1580 | unregister_netdevice_notifier(&rose_dev_notifier); | |
1581 | ||
1582 | sock_unregister(PF_ROSE); | |
1583 | ||
1584 | for (i = 0; i < rose_ndevs; i++) { | |
1585 | struct net_device *dev = dev_rose[i]; | |
1586 | ||
1587 | if (dev) { | |
1588 | unregister_netdev(dev); | |
1589 | free_netdev(dev); | |
1590 | } | |
1591 | } | |
1592 | ||
1593 | kfree(dev_rose); | |
1594 | proto_unregister(&rose_proto); | |
1595 | } | |
1596 | ||
1597 | module_exit(rose_exit); |