Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify | |
3 | * it under the terms of the GNU General Public License as published by | |
4 | * the Free Software Foundation; either version 2 of the License, or | |
5 | * (at your option) any later version. | |
6 | * | |
7 | * Copyright Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) | |
8 | * Copyright Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk) | |
9 | * Copyright Darryl Miles G7LED (dlm@g7led.demon.co.uk) | |
10 | */ | |
11 | #include <linux/config.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/moduleparam.h> | |
4fc268d2 | 14 | #include <linux/capability.h> |
1da177e4 LT |
15 | #include <linux/errno.h> |
16 | #include <linux/types.h> | |
17 | #include <linux/socket.h> | |
18 | #include <linux/in.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/sched.h> | |
21 | #include <linux/timer.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/sockios.h> | |
24 | #include <linux/net.h> | |
25 | #include <linux/stat.h> | |
26 | #include <net/ax25.h> | |
27 | #include <linux/inet.h> | |
28 | #include <linux/netdevice.h> | |
29 | #include <linux/if_arp.h> | |
30 | #include <linux/skbuff.h> | |
31 | #include <net/sock.h> | |
32 | #include <asm/uaccess.h> | |
33 | #include <asm/system.h> | |
34 | #include <linux/fcntl.h> | |
35 | #include <linux/termios.h> /* For TIOCINQ/OUTQ */ | |
36 | #include <linux/mm.h> | |
37 | #include <linux/interrupt.h> | |
38 | #include <linux/notifier.h> | |
39 | #include <net/netrom.h> | |
40 | #include <linux/proc_fs.h> | |
41 | #include <linux/seq_file.h> | |
42 | #include <net/ip.h> | |
c752f073 | 43 | #include <net/tcp_states.h> |
1da177e4 LT |
44 | #include <net/arp.h> |
45 | #include <linux/init.h> | |
46 | ||
47 | static int nr_ndevs = 4; | |
48 | ||
49 | int sysctl_netrom_default_path_quality = NR_DEFAULT_QUAL; | |
50 | int sysctl_netrom_obsolescence_count_initialiser = NR_DEFAULT_OBS; | |
51 | int sysctl_netrom_network_ttl_initialiser = NR_DEFAULT_TTL; | |
52 | int sysctl_netrom_transport_timeout = NR_DEFAULT_T1; | |
53 | int sysctl_netrom_transport_maximum_tries = NR_DEFAULT_N2; | |
54 | int sysctl_netrom_transport_acknowledge_delay = NR_DEFAULT_T2; | |
55 | int sysctl_netrom_transport_busy_delay = NR_DEFAULT_T4; | |
56 | int sysctl_netrom_transport_requested_window_size = NR_DEFAULT_WINDOW; | |
57 | int sysctl_netrom_transport_no_activity_timeout = NR_DEFAULT_IDLE; | |
58 | int sysctl_netrom_routing_control = NR_DEFAULT_ROUTING; | |
59 | int sysctl_netrom_link_fails_count = NR_DEFAULT_FAILS; | |
e21ce8c7 | 60 | int sysctl_netrom_reset_circuit = NR_DEFAULT_RESET; |
1da177e4 LT |
61 | |
62 | static unsigned short circuit = 0x101; | |
63 | ||
64 | static HLIST_HEAD(nr_list); | |
65 | static DEFINE_SPINLOCK(nr_list_lock); | |
66 | ||
90ddc4f0 | 67 | static const struct proto_ops nr_proto_ops; |
1da177e4 LT |
68 | |
69 | /* | |
70 | * Socket removal during an interrupt is now safe. | |
71 | */ | |
72 | static void nr_remove_socket(struct sock *sk) | |
73 | { | |
74 | spin_lock_bh(&nr_list_lock); | |
75 | sk_del_node_init(sk); | |
76 | spin_unlock_bh(&nr_list_lock); | |
77 | } | |
78 | ||
79 | /* | |
80 | * Kill all bound sockets on a dropped device. | |
81 | */ | |
82 | static void nr_kill_by_device(struct net_device *dev) | |
83 | { | |
84 | struct sock *s; | |
85 | struct hlist_node *node; | |
86 | ||
87 | spin_lock_bh(&nr_list_lock); | |
88 | sk_for_each(s, node, &nr_list) | |
89 | if (nr_sk(s)->device == dev) | |
90 | nr_disconnect(s, ENETUNREACH); | |
91 | spin_unlock_bh(&nr_list_lock); | |
92 | } | |
93 | ||
94 | /* | |
95 | * Handle device status changes. | |
96 | */ | |
97 | static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr) | |
98 | { | |
99 | struct net_device *dev = (struct net_device *)ptr; | |
100 | ||
101 | if (event != NETDEV_DOWN) | |
102 | return NOTIFY_DONE; | |
103 | ||
104 | nr_kill_by_device(dev); | |
105 | nr_rt_device_down(dev); | |
106 | ||
107 | return NOTIFY_DONE; | |
108 | } | |
109 | ||
110 | /* | |
111 | * Add a socket to the bound sockets list. | |
112 | */ | |
113 | static void nr_insert_socket(struct sock *sk) | |
114 | { | |
115 | spin_lock_bh(&nr_list_lock); | |
116 | sk_add_node(sk, &nr_list); | |
117 | spin_unlock_bh(&nr_list_lock); | |
118 | } | |
119 | ||
120 | /* | |
121 | * Find a socket that wants to accept the Connect Request we just | |
122 | * received. | |
123 | */ | |
124 | static struct sock *nr_find_listener(ax25_address *addr) | |
125 | { | |
126 | struct sock *s; | |
127 | struct hlist_node *node; | |
128 | ||
129 | spin_lock_bh(&nr_list_lock); | |
130 | sk_for_each(s, node, &nr_list) | |
131 | if (!ax25cmp(&nr_sk(s)->source_addr, addr) && | |
132 | s->sk_state == TCP_LISTEN) { | |
133 | bh_lock_sock(s); | |
134 | goto found; | |
135 | } | |
136 | s = NULL; | |
137 | found: | |
138 | spin_unlock_bh(&nr_list_lock); | |
139 | return s; | |
140 | } | |
141 | ||
142 | /* | |
143 | * Find a connected NET/ROM socket given my circuit IDs. | |
144 | */ | |
145 | static struct sock *nr_find_socket(unsigned char index, unsigned char id) | |
146 | { | |
147 | struct sock *s; | |
148 | struct hlist_node *node; | |
149 | ||
150 | spin_lock_bh(&nr_list_lock); | |
151 | sk_for_each(s, node, &nr_list) { | |
152 | struct nr_sock *nr = nr_sk(s); | |
153 | ||
154 | if (nr->my_index == index && nr->my_id == id) { | |
155 | bh_lock_sock(s); | |
156 | goto found; | |
157 | } | |
158 | } | |
159 | s = NULL; | |
160 | found: | |
161 | spin_unlock_bh(&nr_list_lock); | |
162 | return s; | |
163 | } | |
164 | ||
165 | /* | |
166 | * Find a connected NET/ROM socket given their circuit IDs. | |
167 | */ | |
168 | static struct sock *nr_find_peer(unsigned char index, unsigned char id, | |
169 | ax25_address *dest) | |
170 | { | |
171 | struct sock *s; | |
172 | struct hlist_node *node; | |
173 | ||
174 | spin_lock_bh(&nr_list_lock); | |
175 | sk_for_each(s, node, &nr_list) { | |
176 | struct nr_sock *nr = nr_sk(s); | |
177 | ||
178 | if (nr->your_index == index && nr->your_id == id && | |
179 | !ax25cmp(&nr->dest_addr, dest)) { | |
180 | bh_lock_sock(s); | |
181 | goto found; | |
182 | } | |
183 | } | |
184 | s = NULL; | |
185 | found: | |
186 | spin_unlock_bh(&nr_list_lock); | |
187 | return s; | |
188 | } | |
189 | ||
190 | /* | |
191 | * Find next free circuit ID. | |
192 | */ | |
193 | static unsigned short nr_find_next_circuit(void) | |
194 | { | |
195 | unsigned short id = circuit; | |
196 | unsigned char i, j; | |
197 | struct sock *sk; | |
198 | ||
199 | for (;;) { | |
200 | i = id / 256; | |
201 | j = id % 256; | |
202 | ||
203 | if (i != 0 && j != 0) { | |
204 | if ((sk=nr_find_socket(i, j)) == NULL) | |
205 | break; | |
206 | bh_unlock_sock(sk); | |
207 | } | |
208 | ||
209 | id++; | |
210 | } | |
211 | ||
212 | return id; | |
213 | } | |
214 | ||
215 | /* | |
216 | * Deferred destroy. | |
217 | */ | |
218 | void nr_destroy_socket(struct sock *); | |
219 | ||
220 | /* | |
221 | * Handler for deferred kills. | |
222 | */ | |
223 | static void nr_destroy_timer(unsigned long data) | |
224 | { | |
225 | struct sock *sk=(struct sock *)data; | |
226 | bh_lock_sock(sk); | |
227 | sock_hold(sk); | |
228 | nr_destroy_socket(sk); | |
229 | bh_unlock_sock(sk); | |
230 | sock_put(sk); | |
231 | } | |
232 | ||
233 | /* | |
234 | * This is called from user mode and the timers. Thus it protects itself | |
235 | * against interrupt users but doesn't worry about being called during | |
236 | * work. Once it is removed from the queue no interrupt or bottom half | |
237 | * will touch it and we are (fairly 8-) ) safe. | |
238 | */ | |
239 | void nr_destroy_socket(struct sock *sk) | |
240 | { | |
241 | struct sk_buff *skb; | |
242 | ||
243 | nr_remove_socket(sk); | |
244 | ||
245 | nr_stop_heartbeat(sk); | |
246 | nr_stop_t1timer(sk); | |
247 | nr_stop_t2timer(sk); | |
248 | nr_stop_t4timer(sk); | |
249 | nr_stop_idletimer(sk); | |
250 | ||
251 | nr_clear_queues(sk); /* Flush the queues */ | |
252 | ||
253 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
254 | if (skb->sk != sk) { /* A pending connection */ | |
255 | /* Queue the unaccepted socket for death */ | |
256 | sock_set_flag(skb->sk, SOCK_DEAD); | |
257 | nr_start_heartbeat(skb->sk); | |
258 | nr_sk(skb->sk)->state = NR_STATE_0; | |
259 | } | |
260 | ||
261 | kfree_skb(skb); | |
262 | } | |
263 | ||
264 | if (atomic_read(&sk->sk_wmem_alloc) || | |
265 | atomic_read(&sk->sk_rmem_alloc)) { | |
266 | /* Defer: outstanding buffers */ | |
267 | sk->sk_timer.function = nr_destroy_timer; | |
268 | sk->sk_timer.expires = jiffies + 2 * HZ; | |
269 | add_timer(&sk->sk_timer); | |
270 | } else | |
271 | sock_put(sk); | |
272 | } | |
273 | ||
274 | /* | |
275 | * Handling for system calls applied via the various interfaces to a | |
276 | * NET/ROM socket object. | |
277 | */ | |
278 | ||
279 | static int nr_setsockopt(struct socket *sock, int level, int optname, | |
280 | char __user *optval, int optlen) | |
281 | { | |
282 | struct sock *sk = sock->sk; | |
283 | struct nr_sock *nr = nr_sk(sk); | |
284 | int opt; | |
285 | ||
286 | if (level != SOL_NETROM) | |
287 | return -ENOPROTOOPT; | |
288 | ||
289 | if (optlen < sizeof(int)) | |
290 | return -EINVAL; | |
291 | ||
292 | if (get_user(opt, (int __user *)optval)) | |
293 | return -EFAULT; | |
294 | ||
295 | switch (optname) { | |
296 | case NETROM_T1: | |
297 | if (opt < 1) | |
298 | return -EINVAL; | |
299 | nr->t1 = opt * HZ; | |
300 | return 0; | |
301 | ||
302 | case NETROM_T2: | |
303 | if (opt < 1) | |
304 | return -EINVAL; | |
305 | nr->t2 = opt * HZ; | |
306 | return 0; | |
307 | ||
308 | case NETROM_N2: | |
309 | if (opt < 1 || opt > 31) | |
310 | return -EINVAL; | |
311 | nr->n2 = opt; | |
312 | return 0; | |
313 | ||
314 | case NETROM_T4: | |
315 | if (opt < 1) | |
316 | return -EINVAL; | |
317 | nr->t4 = opt * HZ; | |
318 | return 0; | |
319 | ||
320 | case NETROM_IDLE: | |
321 | if (opt < 0) | |
322 | return -EINVAL; | |
323 | nr->idle = opt * 60 * HZ; | |
324 | return 0; | |
325 | ||
326 | default: | |
327 | return -ENOPROTOOPT; | |
328 | } | |
329 | } | |
330 | ||
331 | static int nr_getsockopt(struct socket *sock, int level, int optname, | |
332 | char __user *optval, int __user *optlen) | |
333 | { | |
334 | struct sock *sk = sock->sk; | |
335 | struct nr_sock *nr = nr_sk(sk); | |
336 | int val = 0; | |
337 | int len; | |
338 | ||
339 | if (level != SOL_NETROM) | |
340 | return -ENOPROTOOPT; | |
341 | ||
342 | if (get_user(len, optlen)) | |
343 | return -EFAULT; | |
344 | ||
345 | if (len < 0) | |
346 | return -EINVAL; | |
347 | ||
348 | switch (optname) { | |
349 | case NETROM_T1: | |
350 | val = nr->t1 / HZ; | |
351 | break; | |
352 | ||
353 | case NETROM_T2: | |
354 | val = nr->t2 / HZ; | |
355 | break; | |
356 | ||
357 | case NETROM_N2: | |
358 | val = nr->n2; | |
359 | break; | |
360 | ||
361 | case NETROM_T4: | |
362 | val = nr->t4 / HZ; | |
363 | break; | |
364 | ||
365 | case NETROM_IDLE: | |
366 | val = nr->idle / (60 * HZ); | |
367 | break; | |
368 | ||
369 | default: | |
370 | return -ENOPROTOOPT; | |
371 | } | |
372 | ||
373 | len = min_t(unsigned int, len, sizeof(int)); | |
374 | ||
375 | if (put_user(len, optlen)) | |
376 | return -EFAULT; | |
377 | ||
378 | return copy_to_user(optval, &val, len) ? -EFAULT : 0; | |
379 | } | |
380 | ||
381 | static int nr_listen(struct socket *sock, int backlog) | |
382 | { | |
383 | struct sock *sk = sock->sk; | |
384 | ||
385 | lock_sock(sk); | |
386 | if (sk->sk_state != TCP_LISTEN) { | |
387 | memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN); | |
388 | sk->sk_max_ack_backlog = backlog; | |
389 | sk->sk_state = TCP_LISTEN; | |
390 | release_sock(sk); | |
391 | return 0; | |
392 | } | |
393 | release_sock(sk); | |
394 | ||
395 | return -EOPNOTSUPP; | |
396 | } | |
397 | ||
398 | static struct proto nr_proto = { | |
399 | .name = "NETROM", | |
400 | .owner = THIS_MODULE, | |
401 | .obj_size = sizeof(struct nr_sock), | |
402 | }; | |
403 | ||
404 | static int nr_create(struct socket *sock, int protocol) | |
405 | { | |
406 | struct sock *sk; | |
407 | struct nr_sock *nr; | |
408 | ||
409 | if (sock->type != SOCK_SEQPACKET || protocol != 0) | |
410 | return -ESOCKTNOSUPPORT; | |
411 | ||
412 | if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, &nr_proto, 1)) == NULL) | |
413 | return -ENOMEM; | |
414 | ||
415 | nr = nr_sk(sk); | |
416 | ||
417 | sock_init_data(sock, sk); | |
418 | ||
419 | sock->ops = &nr_proto_ops; | |
420 | sk->sk_protocol = protocol; | |
421 | ||
422 | skb_queue_head_init(&nr->ack_queue); | |
423 | skb_queue_head_init(&nr->reseq_queue); | |
424 | skb_queue_head_init(&nr->frag_queue); | |
425 | ||
426 | nr_init_timers(sk); | |
427 | ||
4d8937d0 RB |
428 | nr->t1 = |
429 | msecs_to_jiffies(sysctl_netrom_transport_timeout); | |
430 | nr->t2 = | |
431 | msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay); | |
432 | nr->n2 = | |
433 | msecs_to_jiffies(sysctl_netrom_transport_maximum_tries); | |
434 | nr->t4 = | |
435 | msecs_to_jiffies(sysctl_netrom_transport_busy_delay); | |
436 | nr->idle = | |
437 | msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout); | |
1da177e4 LT |
438 | nr->window = sysctl_netrom_transport_requested_window_size; |
439 | ||
440 | nr->bpqext = 1; | |
441 | nr->state = NR_STATE_0; | |
442 | ||
443 | return 0; | |
444 | } | |
445 | ||
446 | static struct sock *nr_make_new(struct sock *osk) | |
447 | { | |
448 | struct sock *sk; | |
449 | struct nr_sock *nr, *onr; | |
450 | ||
451 | if (osk->sk_type != SOCK_SEQPACKET) | |
452 | return NULL; | |
453 | ||
454 | if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, osk->sk_prot, 1)) == NULL) | |
455 | return NULL; | |
456 | ||
457 | nr = nr_sk(sk); | |
458 | ||
459 | sock_init_data(NULL, sk); | |
460 | ||
461 | sk->sk_type = osk->sk_type; | |
462 | sk->sk_socket = osk->sk_socket; | |
463 | sk->sk_priority = osk->sk_priority; | |
464 | sk->sk_protocol = osk->sk_protocol; | |
465 | sk->sk_rcvbuf = osk->sk_rcvbuf; | |
466 | sk->sk_sndbuf = osk->sk_sndbuf; | |
467 | sk->sk_state = TCP_ESTABLISHED; | |
468 | sk->sk_sleep = osk->sk_sleep; | |
53b924b3 | 469 | sock_copy_flags(sk, osk); |
1da177e4 LT |
470 | |
471 | skb_queue_head_init(&nr->ack_queue); | |
472 | skb_queue_head_init(&nr->reseq_queue); | |
473 | skb_queue_head_init(&nr->frag_queue); | |
474 | ||
475 | nr_init_timers(sk); | |
476 | ||
477 | onr = nr_sk(osk); | |
478 | ||
479 | nr->t1 = onr->t1; | |
480 | nr->t2 = onr->t2; | |
481 | nr->n2 = onr->n2; | |
482 | nr->t4 = onr->t4; | |
483 | nr->idle = onr->idle; | |
484 | nr->window = onr->window; | |
485 | ||
486 | nr->device = onr->device; | |
487 | nr->bpqext = onr->bpqext; | |
488 | ||
489 | return sk; | |
490 | } | |
491 | ||
492 | static int nr_release(struct socket *sock) | |
493 | { | |
494 | struct sock *sk = sock->sk; | |
495 | struct nr_sock *nr; | |
496 | ||
497 | if (sk == NULL) return 0; | |
498 | ||
499 | sock_hold(sk); | |
500 | lock_sock(sk); | |
501 | nr = nr_sk(sk); | |
502 | ||
503 | switch (nr->state) { | |
504 | case NR_STATE_0: | |
505 | case NR_STATE_1: | |
506 | case NR_STATE_2: | |
507 | nr_disconnect(sk, 0); | |
508 | nr_destroy_socket(sk); | |
509 | break; | |
510 | ||
511 | case NR_STATE_3: | |
512 | nr_clear_queues(sk); | |
513 | nr->n2count = 0; | |
514 | nr_write_internal(sk, NR_DISCREQ); | |
515 | nr_start_t1timer(sk); | |
516 | nr_stop_t2timer(sk); | |
517 | nr_stop_t4timer(sk); | |
518 | nr_stop_idletimer(sk); | |
519 | nr->state = NR_STATE_2; | |
520 | sk->sk_state = TCP_CLOSE; | |
521 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
522 | sk->sk_state_change(sk); | |
523 | sock_orphan(sk); | |
524 | sock_set_flag(sk, SOCK_DESTROY); | |
525 | sk->sk_socket = NULL; | |
526 | break; | |
527 | ||
528 | default: | |
529 | sk->sk_socket = NULL; | |
530 | break; | |
531 | } | |
532 | ||
533 | sock->sk = NULL; | |
534 | release_sock(sk); | |
535 | sock_put(sk); | |
536 | ||
537 | return 0; | |
538 | } | |
539 | ||
540 | static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
541 | { | |
542 | struct sock *sk = sock->sk; | |
543 | struct nr_sock *nr = nr_sk(sk); | |
544 | struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr; | |
545 | struct net_device *dev; | |
01d7dd0e RB |
546 | ax25_uid_assoc *user; |
547 | ax25_address *source; | |
1da177e4 LT |
548 | |
549 | lock_sock(sk); | |
550 | if (!sock_flag(sk, SOCK_ZAPPED)) { | |
551 | release_sock(sk); | |
552 | return -EINVAL; | |
553 | } | |
554 | if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) { | |
555 | release_sock(sk); | |
556 | return -EINVAL; | |
557 | } | |
558 | if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) { | |
559 | release_sock(sk); | |
560 | return -EINVAL; | |
561 | } | |
562 | if (addr->fsa_ax25.sax25_family != AF_NETROM) { | |
563 | release_sock(sk); | |
564 | return -EINVAL; | |
565 | } | |
566 | if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) { | |
567 | SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n"); | |
568 | release_sock(sk); | |
569 | return -EADDRNOTAVAIL; | |
570 | } | |
571 | ||
572 | /* | |
573 | * Only the super user can set an arbitrary user callsign. | |
574 | */ | |
575 | if (addr->fsa_ax25.sax25_ndigis == 1) { | |
576 | if (!capable(CAP_NET_BIND_SERVICE)) { | |
577 | dev_put(dev); | |
578 | release_sock(sk); | |
579 | return -EACCES; | |
580 | } | |
581 | nr->user_addr = addr->fsa_digipeater[0]; | |
582 | nr->source_addr = addr->fsa_ax25.sax25_call; | |
583 | } else { | |
584 | source = &addr->fsa_ax25.sax25_call; | |
585 | ||
01d7dd0e RB |
586 | user = ax25_findbyuid(current->euid); |
587 | if (user) { | |
588 | nr->user_addr = user->call; | |
589 | ax25_uid_put(user); | |
590 | } else { | |
1da177e4 LT |
591 | if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) { |
592 | release_sock(sk); | |
593 | dev_put(dev); | |
594 | return -EPERM; | |
595 | } | |
01d7dd0e | 596 | nr->user_addr = *source; |
1da177e4 LT |
597 | } |
598 | ||
1da177e4 LT |
599 | nr->source_addr = *source; |
600 | } | |
601 | ||
602 | nr->device = dev; | |
603 | nr_insert_socket(sk); | |
604 | ||
605 | sock_reset_flag(sk, SOCK_ZAPPED); | |
606 | dev_put(dev); | |
607 | release_sock(sk); | |
608 | SOCK_DEBUG(sk, "NET/ROM: socket is bound\n"); | |
609 | return 0; | |
610 | } | |
611 | ||
612 | static int nr_connect(struct socket *sock, struct sockaddr *uaddr, | |
613 | int addr_len, int flags) | |
614 | { | |
615 | struct sock *sk = sock->sk; | |
616 | struct nr_sock *nr = nr_sk(sk); | |
617 | struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr; | |
01d7dd0e RB |
618 | ax25_address *source = NULL; |
619 | ax25_uid_assoc *user; | |
1da177e4 LT |
620 | struct net_device *dev; |
621 | ||
622 | lock_sock(sk); | |
623 | if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { | |
624 | sock->state = SS_CONNECTED; | |
625 | release_sock(sk); | |
626 | return 0; /* Connect completed during a ERESTARTSYS event */ | |
627 | } | |
628 | ||
629 | if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { | |
630 | sock->state = SS_UNCONNECTED; | |
631 | release_sock(sk); | |
632 | return -ECONNREFUSED; | |
633 | } | |
634 | ||
635 | if (sk->sk_state == TCP_ESTABLISHED) { | |
636 | release_sock(sk); | |
637 | return -EISCONN; /* No reconnect on a seqpacket socket */ | |
638 | } | |
639 | ||
640 | sk->sk_state = TCP_CLOSE; | |
641 | sock->state = SS_UNCONNECTED; | |
642 | ||
643 | if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) { | |
644 | release_sock(sk); | |
645 | return -EINVAL; | |
646 | } | |
647 | if (addr->sax25_family != AF_NETROM) { | |
648 | release_sock(sk); | |
649 | return -EINVAL; | |
650 | } | |
651 | if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ | |
652 | sock_reset_flag(sk, SOCK_ZAPPED); | |
653 | ||
654 | if ((dev = nr_dev_first()) == NULL) { | |
655 | release_sock(sk); | |
656 | return -ENETUNREACH; | |
657 | } | |
658 | source = (ax25_address *)dev->dev_addr; | |
659 | ||
01d7dd0e RB |
660 | user = ax25_findbyuid(current->euid); |
661 | if (user) { | |
662 | nr->user_addr = user->call; | |
663 | ax25_uid_put(user); | |
664 | } else { | |
1da177e4 LT |
665 | if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) { |
666 | dev_put(dev); | |
667 | release_sock(sk); | |
668 | return -EPERM; | |
669 | } | |
01d7dd0e | 670 | nr->user_addr = *source; |
1da177e4 LT |
671 | } |
672 | ||
1da177e4 LT |
673 | nr->source_addr = *source; |
674 | nr->device = dev; | |
675 | ||
676 | dev_put(dev); | |
677 | nr_insert_socket(sk); /* Finish the bind */ | |
678 | } | |
679 | ||
680 | nr->dest_addr = addr->sax25_call; | |
681 | ||
682 | release_sock(sk); | |
683 | circuit = nr_find_next_circuit(); | |
684 | lock_sock(sk); | |
685 | ||
686 | nr->my_index = circuit / 256; | |
687 | nr->my_id = circuit % 256; | |
688 | ||
689 | circuit++; | |
690 | ||
691 | /* Move to connecting socket, start sending Connect Requests */ | |
692 | sock->state = SS_CONNECTING; | |
693 | sk->sk_state = TCP_SYN_SENT; | |
694 | ||
695 | nr_establish_data_link(sk); | |
696 | ||
697 | nr->state = NR_STATE_1; | |
698 | ||
699 | nr_start_heartbeat(sk); | |
700 | ||
701 | /* Now the loop */ | |
702 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { | |
703 | release_sock(sk); | |
704 | return -EINPROGRESS; | |
705 | } | |
706 | ||
707 | /* | |
708 | * A Connect Ack with Choke or timeout or failed routing will go to | |
709 | * closed. | |
710 | */ | |
711 | if (sk->sk_state == TCP_SYN_SENT) { | |
712 | struct task_struct *tsk = current; | |
713 | DECLARE_WAITQUEUE(wait, tsk); | |
714 | ||
715 | add_wait_queue(sk->sk_sleep, &wait); | |
716 | for (;;) { | |
717 | set_current_state(TASK_INTERRUPTIBLE); | |
718 | if (sk->sk_state != TCP_SYN_SENT) | |
719 | break; | |
720 | release_sock(sk); | |
721 | if (!signal_pending(tsk)) { | |
722 | schedule(); | |
723 | lock_sock(sk); | |
724 | continue; | |
725 | } | |
726 | current->state = TASK_RUNNING; | |
727 | remove_wait_queue(sk->sk_sleep, &wait); | |
728 | return -ERESTARTSYS; | |
729 | } | |
730 | current->state = TASK_RUNNING; | |
731 | remove_wait_queue(sk->sk_sleep, &wait); | |
732 | } | |
733 | ||
734 | if (sk->sk_state != TCP_ESTABLISHED) { | |
735 | sock->state = SS_UNCONNECTED; | |
736 | release_sock(sk); | |
737 | return sock_error(sk); /* Always set at this point */ | |
738 | } | |
739 | ||
740 | sock->state = SS_CONNECTED; | |
741 | release_sock(sk); | |
742 | ||
743 | return 0; | |
744 | } | |
745 | ||
746 | static int nr_accept(struct socket *sock, struct socket *newsock, int flags) | |
747 | { | |
748 | struct task_struct *tsk = current; | |
749 | DECLARE_WAITQUEUE(wait, tsk); | |
750 | struct sk_buff *skb; | |
751 | struct sock *newsk; | |
752 | struct sock *sk; | |
753 | int err = 0; | |
754 | ||
755 | if ((sk = sock->sk) == NULL) | |
756 | return -EINVAL; | |
757 | ||
758 | lock_sock(sk); | |
759 | if (sk->sk_type != SOCK_SEQPACKET) { | |
760 | err = -EOPNOTSUPP; | |
761 | goto out; | |
762 | } | |
763 | ||
764 | if (sk->sk_state != TCP_LISTEN) { | |
765 | err = -EINVAL; | |
766 | goto out; | |
767 | } | |
768 | ||
769 | /* | |
770 | * The write queue this time is holding sockets ready to use | |
771 | * hooked into the SABM we saved | |
772 | */ | |
773 | add_wait_queue(sk->sk_sleep, &wait); | |
774 | for (;;) { | |
775 | skb = skb_dequeue(&sk->sk_receive_queue); | |
776 | if (skb) | |
777 | break; | |
778 | ||
779 | current->state = TASK_INTERRUPTIBLE; | |
780 | release_sock(sk); | |
781 | if (flags & O_NONBLOCK) { | |
782 | current->state = TASK_RUNNING; | |
783 | remove_wait_queue(sk->sk_sleep, &wait); | |
784 | return -EWOULDBLOCK; | |
785 | } | |
786 | if (!signal_pending(tsk)) { | |
787 | schedule(); | |
788 | lock_sock(sk); | |
789 | continue; | |
790 | } | |
791 | current->state = TASK_RUNNING; | |
792 | remove_wait_queue(sk->sk_sleep, &wait); | |
793 | return -ERESTARTSYS; | |
794 | } | |
795 | current->state = TASK_RUNNING; | |
796 | remove_wait_queue(sk->sk_sleep, &wait); | |
797 | ||
798 | newsk = skb->sk; | |
799 | newsk->sk_socket = newsock; | |
800 | newsk->sk_sleep = &newsock->wait; | |
801 | ||
802 | /* Now attach up the new socket */ | |
803 | kfree_skb(skb); | |
804 | sk->sk_ack_backlog--; | |
805 | newsock->sk = newsk; | |
806 | ||
807 | out: | |
808 | release_sock(sk); | |
809 | return err; | |
810 | } | |
811 | ||
812 | static int nr_getname(struct socket *sock, struct sockaddr *uaddr, | |
813 | int *uaddr_len, int peer) | |
814 | { | |
815 | struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr; | |
816 | struct sock *sk = sock->sk; | |
817 | struct nr_sock *nr = nr_sk(sk); | |
818 | ||
819 | lock_sock(sk); | |
820 | if (peer != 0) { | |
821 | if (sk->sk_state != TCP_ESTABLISHED) { | |
822 | release_sock(sk); | |
823 | return -ENOTCONN; | |
824 | } | |
825 | sax->fsa_ax25.sax25_family = AF_NETROM; | |
826 | sax->fsa_ax25.sax25_ndigis = 1; | |
827 | sax->fsa_ax25.sax25_call = nr->user_addr; | |
828 | sax->fsa_digipeater[0] = nr->dest_addr; | |
829 | *uaddr_len = sizeof(struct full_sockaddr_ax25); | |
830 | } else { | |
831 | sax->fsa_ax25.sax25_family = AF_NETROM; | |
832 | sax->fsa_ax25.sax25_ndigis = 0; | |
833 | sax->fsa_ax25.sax25_call = nr->source_addr; | |
834 | *uaddr_len = sizeof(struct sockaddr_ax25); | |
835 | } | |
836 | release_sock(sk); | |
837 | ||
838 | return 0; | |
839 | } | |
840 | ||
841 | int nr_rx_frame(struct sk_buff *skb, struct net_device *dev) | |
842 | { | |
843 | struct sock *sk; | |
844 | struct sock *make; | |
845 | struct nr_sock *nr_make; | |
846 | ax25_address *src, *dest, *user; | |
847 | unsigned short circuit_index, circuit_id; | |
848 | unsigned short peer_circuit_index, peer_circuit_id; | |
849 | unsigned short frametype, flags, window, timeout; | |
850 | int ret; | |
851 | ||
852 | skb->sk = NULL; /* Initially we don't know who it's for */ | |
853 | ||
854 | /* | |
855 | * skb->data points to the netrom frame start | |
856 | */ | |
857 | ||
858 | src = (ax25_address *)(skb->data + 0); | |
859 | dest = (ax25_address *)(skb->data + 7); | |
860 | ||
861 | circuit_index = skb->data[15]; | |
862 | circuit_id = skb->data[16]; | |
863 | peer_circuit_index = skb->data[17]; | |
864 | peer_circuit_id = skb->data[18]; | |
865 | frametype = skb->data[19] & 0x0F; | |
866 | flags = skb->data[19] & 0xF0; | |
867 | ||
1da177e4 LT |
868 | /* |
869 | * Check for an incoming IP over NET/ROM frame. | |
870 | */ | |
98a82feb RB |
871 | if (frametype == NR_PROTOEXT && |
872 | circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) { | |
1da177e4 LT |
873 | skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN); |
874 | skb->h.raw = skb->data; | |
875 | ||
876 | return nr_rx_ip(skb, dev); | |
877 | } | |
1da177e4 LT |
878 | |
879 | /* | |
880 | * Find an existing socket connection, based on circuit ID, if it's | |
881 | * a Connect Request base it on their circuit ID. | |
882 | * | |
883 | * Circuit ID 0/0 is not valid but it could still be a "reset" for a | |
884 | * circuit that no longer exists at the other end ... | |
885 | */ | |
886 | ||
887 | sk = NULL; | |
888 | ||
889 | if (circuit_index == 0 && circuit_id == 0) { | |
890 | if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG) | |
891 | sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src); | |
892 | } else { | |
893 | if (frametype == NR_CONNREQ) | |
894 | sk = nr_find_peer(circuit_index, circuit_id, src); | |
895 | else | |
896 | sk = nr_find_socket(circuit_index, circuit_id); | |
897 | } | |
898 | ||
899 | if (sk != NULL) { | |
900 | skb->h.raw = skb->data; | |
901 | ||
902 | if (frametype == NR_CONNACK && skb->len == 22) | |
903 | nr_sk(sk)->bpqext = 1; | |
904 | else | |
905 | nr_sk(sk)->bpqext = 0; | |
906 | ||
907 | ret = nr_process_rx_frame(sk, skb); | |
908 | bh_unlock_sock(sk); | |
909 | return ret; | |
910 | } | |
911 | ||
912 | /* | |
913 | * Now it should be a CONNREQ. | |
914 | */ | |
915 | if (frametype != NR_CONNREQ) { | |
916 | /* | |
917 | * Here it would be nice to be able to send a reset but | |
e21ce8c7 RB |
918 | * NET/ROM doesn't have one. We've tried to extend the protocol |
919 | * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that | |
920 | * apparently kills BPQ boxes... :-( | |
921 | * So now we try to follow the established behaviour of | |
922 | * G8PZT's Xrouter which is sending packets with command type 7 | |
923 | * as an extension of the protocol. | |
1da177e4 | 924 | */ |
e21ce8c7 RB |
925 | if (sysctl_netrom_reset_circuit && |
926 | (frametype != NR_RESET || flags != 0)) | |
927 | nr_transmit_reset(skb, 1); | |
928 | ||
1da177e4 LT |
929 | return 0; |
930 | } | |
931 | ||
932 | sk = nr_find_listener(dest); | |
933 | ||
934 | user = (ax25_address *)(skb->data + 21); | |
935 | ||
936 | if (sk == NULL || sk_acceptq_is_full(sk) || | |
937 | (make = nr_make_new(sk)) == NULL) { | |
938 | nr_transmit_refusal(skb, 0); | |
939 | if (sk) | |
940 | bh_unlock_sock(sk); | |
941 | return 0; | |
942 | } | |
943 | ||
944 | window = skb->data[20]; | |
945 | ||
946 | skb->sk = make; | |
947 | make->sk_state = TCP_ESTABLISHED; | |
948 | ||
949 | /* Fill in his circuit details */ | |
950 | nr_make = nr_sk(make); | |
951 | nr_make->source_addr = *dest; | |
952 | nr_make->dest_addr = *src; | |
953 | nr_make->user_addr = *user; | |
954 | ||
955 | nr_make->your_index = circuit_index; | |
956 | nr_make->your_id = circuit_id; | |
957 | ||
958 | bh_unlock_sock(sk); | |
959 | circuit = nr_find_next_circuit(); | |
960 | bh_lock_sock(sk); | |
961 | ||
962 | nr_make->my_index = circuit / 256; | |
963 | nr_make->my_id = circuit % 256; | |
964 | ||
965 | circuit++; | |
966 | ||
967 | /* Window negotiation */ | |
968 | if (window < nr_make->window) | |
969 | nr_make->window = window; | |
970 | ||
971 | /* L4 timeout negotiation */ | |
972 | if (skb->len == 37) { | |
973 | timeout = skb->data[36] * 256 + skb->data[35]; | |
974 | if (timeout * HZ < nr_make->t1) | |
975 | nr_make->t1 = timeout * HZ; | |
976 | nr_make->bpqext = 1; | |
977 | } else { | |
978 | nr_make->bpqext = 0; | |
979 | } | |
980 | ||
981 | nr_write_internal(make, NR_CONNACK); | |
982 | ||
983 | nr_make->condition = 0x00; | |
984 | nr_make->vs = 0; | |
985 | nr_make->va = 0; | |
986 | nr_make->vr = 0; | |
987 | nr_make->vl = 0; | |
988 | nr_make->state = NR_STATE_3; | |
989 | sk->sk_ack_backlog++; | |
990 | ||
991 | nr_insert_socket(make); | |
992 | ||
993 | skb_queue_head(&sk->sk_receive_queue, skb); | |
994 | ||
995 | nr_start_heartbeat(make); | |
996 | nr_start_idletimer(make); | |
997 | ||
998 | if (!sock_flag(sk, SOCK_DEAD)) | |
999 | sk->sk_data_ready(sk, skb->len); | |
1000 | ||
1001 | bh_unlock_sock(sk); | |
1002 | return 1; | |
1003 | } | |
1004 | ||
1005 | static int nr_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1006 | struct msghdr *msg, size_t len) | |
1007 | { | |
1008 | struct sock *sk = sock->sk; | |
1009 | struct nr_sock *nr = nr_sk(sk); | |
1010 | struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name; | |
1011 | int err; | |
1012 | struct sockaddr_ax25 sax; | |
1013 | struct sk_buff *skb; | |
1014 | unsigned char *asmptr; | |
1015 | int size; | |
1016 | ||
1017 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) | |
1018 | return -EINVAL; | |
1019 | ||
1020 | lock_sock(sk); | |
1021 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
1022 | err = -EADDRNOTAVAIL; | |
1023 | goto out; | |
1024 | } | |
1025 | ||
1026 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1027 | send_sig(SIGPIPE, current, 0); | |
1028 | err = -EPIPE; | |
1029 | goto out; | |
1030 | } | |
1031 | ||
1032 | if (nr->device == NULL) { | |
1033 | err = -ENETUNREACH; | |
1034 | goto out; | |
1035 | } | |
1036 | ||
1037 | if (usax) { | |
1038 | if (msg->msg_namelen < sizeof(sax)) { | |
1039 | err = -EINVAL; | |
1040 | goto out; | |
1041 | } | |
1042 | sax = *usax; | |
1043 | if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) { | |
1044 | err = -EISCONN; | |
1045 | goto out; | |
1046 | } | |
1047 | if (sax.sax25_family != AF_NETROM) { | |
1048 | err = -EINVAL; | |
1049 | goto out; | |
1050 | } | |
1051 | } else { | |
1052 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1053 | err = -ENOTCONN; | |
1054 | goto out; | |
1055 | } | |
1056 | sax.sax25_family = AF_NETROM; | |
1057 | sax.sax25_call = nr->dest_addr; | |
1058 | } | |
1059 | ||
1060 | SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n"); | |
1061 | ||
1062 | /* Build a packet */ | |
1063 | SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n"); | |
1064 | size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN; | |
1065 | ||
1066 | if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) | |
1067 | goto out; | |
1068 | ||
1069 | skb_reserve(skb, size - len); | |
1070 | ||
1071 | /* | |
1072 | * Push down the NET/ROM header | |
1073 | */ | |
1074 | ||
1075 | asmptr = skb_push(skb, NR_TRANSPORT_LEN); | |
1076 | SOCK_DEBUG(sk, "Building NET/ROM Header.\n"); | |
1077 | ||
1078 | /* Build a NET/ROM Transport header */ | |
1079 | ||
1080 | *asmptr++ = nr->your_index; | |
1081 | *asmptr++ = nr->your_id; | |
1082 | *asmptr++ = 0; /* To be filled in later */ | |
1083 | *asmptr++ = 0; /* Ditto */ | |
1084 | *asmptr++ = NR_INFO; | |
1085 | SOCK_DEBUG(sk, "Built header.\n"); | |
1086 | ||
1087 | /* | |
1088 | * Put the data on the end | |
1089 | */ | |
1090 | ||
1091 | skb->h.raw = skb_put(skb, len); | |
1092 | ||
1093 | asmptr = skb->h.raw; | |
1094 | SOCK_DEBUG(sk, "NET/ROM: Appending user data\n"); | |
1095 | ||
1096 | /* User data follows immediately after the NET/ROM transport header */ | |
1097 | if (memcpy_fromiovec(asmptr, msg->msg_iov, len)) { | |
1098 | kfree_skb(skb); | |
1099 | err = -EFAULT; | |
1100 | goto out; | |
1101 | } | |
1102 | ||
1103 | SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n"); | |
1104 | ||
1105 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1106 | kfree_skb(skb); | |
1107 | err = -ENOTCONN; | |
1108 | goto out; | |
1109 | } | |
1110 | ||
1111 | nr_output(sk, skb); /* Shove it onto the queue */ | |
1112 | ||
1113 | err = len; | |
1114 | out: | |
1115 | release_sock(sk); | |
1116 | return err; | |
1117 | } | |
1118 | ||
1119 | static int nr_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1120 | struct msghdr *msg, size_t size, int flags) | |
1121 | { | |
1122 | struct sock *sk = sock->sk; | |
1123 | struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name; | |
1124 | size_t copied; | |
1125 | struct sk_buff *skb; | |
1126 | int er; | |
1127 | ||
1128 | /* | |
1129 | * This works for seqpacket too. The receiver has ordered the queue for | |
1130 | * us! We do one quick check first though | |
1131 | */ | |
1132 | ||
1133 | lock_sock(sk); | |
1134 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1135 | release_sock(sk); | |
1136 | return -ENOTCONN; | |
1137 | } | |
1138 | ||
1139 | /* Now we can treat all alike */ | |
1140 | if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) { | |
1141 | release_sock(sk); | |
1142 | return er; | |
1143 | } | |
1144 | ||
1145 | skb->h.raw = skb->data; | |
1146 | copied = skb->len; | |
1147 | ||
1148 | if (copied > size) { | |
1149 | copied = size; | |
1150 | msg->msg_flags |= MSG_TRUNC; | |
1151 | } | |
1152 | ||
1153 | skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
1154 | ||
1155 | if (sax != NULL) { | |
1156 | sax->sax25_family = AF_NETROM; | |
1157 | memcpy(sax->sax25_call.ax25_call, skb->data + 7, AX25_ADDR_LEN); | |
1158 | } | |
1159 | ||
1160 | msg->msg_namelen = sizeof(*sax); | |
1161 | ||
1162 | skb_free_datagram(sk, skb); | |
1163 | ||
1164 | release_sock(sk); | |
1165 | return copied; | |
1166 | } | |
1167 | ||
1168 | ||
1169 | static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1170 | { | |
1171 | struct sock *sk = sock->sk; | |
1172 | void __user *argp = (void __user *)arg; | |
1173 | int ret; | |
1174 | ||
1da177e4 LT |
1175 | switch (cmd) { |
1176 | case TIOCOUTQ: { | |
1177 | long amount; | |
5ff7630e CH |
1178 | |
1179 | lock_sock(sk); | |
1da177e4 LT |
1180 | amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); |
1181 | if (amount < 0) | |
1182 | amount = 0; | |
1183 | release_sock(sk); | |
1184 | return put_user(amount, (int __user *)argp); | |
1185 | } | |
1186 | ||
1187 | case TIOCINQ: { | |
1188 | struct sk_buff *skb; | |
1189 | long amount = 0L; | |
5ff7630e CH |
1190 | |
1191 | lock_sock(sk); | |
1da177e4 LT |
1192 | /* These two are safe on a single CPU system as only user tasks fiddle here */ |
1193 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) | |
1194 | amount = skb->len; | |
1195 | release_sock(sk); | |
1196 | return put_user(amount, (int __user *)argp); | |
1197 | } | |
1198 | ||
1199 | case SIOCGSTAMP: | |
5ff7630e | 1200 | lock_sock(sk); |
9b37ee75 | 1201 | ret = sock_get_timestamp(sk, argp); |
1da177e4 LT |
1202 | release_sock(sk); |
1203 | return ret; | |
1204 | ||
1205 | case SIOCGIFADDR: | |
1206 | case SIOCSIFADDR: | |
1207 | case SIOCGIFDSTADDR: | |
1208 | case SIOCSIFDSTADDR: | |
1209 | case SIOCGIFBRDADDR: | |
1210 | case SIOCSIFBRDADDR: | |
1211 | case SIOCGIFNETMASK: | |
1212 | case SIOCSIFNETMASK: | |
1213 | case SIOCGIFMETRIC: | |
1214 | case SIOCSIFMETRIC: | |
1da177e4 LT |
1215 | return -EINVAL; |
1216 | ||
1217 | case SIOCADDRT: | |
1218 | case SIOCDELRT: | |
1219 | case SIOCNRDECOBS: | |
1da177e4 LT |
1220 | if (!capable(CAP_NET_ADMIN)) return -EPERM; |
1221 | return nr_rt_ioctl(cmd, argp); | |
1222 | ||
1223 | default: | |
b5e5fa5e | 1224 | return -ENOIOCTLCMD; |
1da177e4 | 1225 | } |
1da177e4 LT |
1226 | |
1227 | return 0; | |
1228 | } | |
1229 | ||
1230 | #ifdef CONFIG_PROC_FS | |
1231 | ||
1232 | static void *nr_info_start(struct seq_file *seq, loff_t *pos) | |
1233 | { | |
1234 | struct sock *s; | |
1235 | struct hlist_node *node; | |
1236 | int i = 1; | |
1237 | ||
1238 | spin_lock_bh(&nr_list_lock); | |
1239 | if (*pos == 0) | |
1240 | return SEQ_START_TOKEN; | |
1241 | ||
1242 | sk_for_each(s, node, &nr_list) { | |
1243 | if (i == *pos) | |
1244 | return s; | |
1245 | ++i; | |
1246 | } | |
1247 | return NULL; | |
1248 | } | |
1249 | ||
1250 | static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos) | |
1251 | { | |
1252 | ++*pos; | |
1253 | ||
1254 | return (v == SEQ_START_TOKEN) ? sk_head(&nr_list) | |
1255 | : sk_next((struct sock *)v); | |
1256 | } | |
1257 | ||
1258 | static void nr_info_stop(struct seq_file *seq, void *v) | |
1259 | { | |
1260 | spin_unlock_bh(&nr_list_lock); | |
1261 | } | |
1262 | ||
1263 | static int nr_info_show(struct seq_file *seq, void *v) | |
1264 | { | |
1265 | struct sock *s = v; | |
1266 | struct net_device *dev; | |
1267 | struct nr_sock *nr; | |
1268 | const char *devname; | |
f75268cd | 1269 | char buf[11]; |
1da177e4 LT |
1270 | |
1271 | if (v == SEQ_START_TOKEN) | |
1272 | seq_puts(seq, | |
1273 | "user_addr dest_node src_node dev my your st vs vr va t1 t2 t4 idle n2 wnd Snd-Q Rcv-Q inode\n"); | |
1274 | ||
1275 | else { | |
1276 | ||
1277 | bh_lock_sock(s); | |
1278 | nr = nr_sk(s); | |
1279 | ||
1280 | if ((dev = nr->device) == NULL) | |
1281 | devname = "???"; | |
1282 | else | |
1283 | devname = dev->name; | |
1284 | ||
f75268cd RB |
1285 | seq_printf(seq, "%-9s ", ax2asc(buf, &nr->user_addr)); |
1286 | seq_printf(seq, "%-9s ", ax2asc(buf, &nr->dest_addr)); | |
1da177e4 LT |
1287 | seq_printf(seq, |
1288 | "%-9s %-3s %02X/%02X %02X/%02X %2d %3d %3d %3d %3lu/%03lu %2lu/%02lu %3lu/%03lu %3lu/%03lu %2d/%02d %3d %5d %5d %ld\n", | |
f75268cd | 1289 | ax2asc(buf, &nr->source_addr), |
1da177e4 LT |
1290 | devname, |
1291 | nr->my_index, | |
1292 | nr->my_id, | |
1293 | nr->your_index, | |
1294 | nr->your_id, | |
1295 | nr->state, | |
1296 | nr->vs, | |
1297 | nr->vr, | |
1298 | nr->va, | |
1299 | ax25_display_timer(&nr->t1timer) / HZ, | |
1300 | nr->t1 / HZ, | |
1301 | ax25_display_timer(&nr->t2timer) / HZ, | |
1302 | nr->t2 / HZ, | |
1303 | ax25_display_timer(&nr->t4timer) / HZ, | |
1304 | nr->t4 / HZ, | |
1305 | ax25_display_timer(&nr->idletimer) / (60 * HZ), | |
1306 | nr->idle / (60 * HZ), | |
1307 | nr->n2count, | |
1308 | nr->n2, | |
1309 | nr->window, | |
1310 | atomic_read(&s->sk_wmem_alloc), | |
1311 | atomic_read(&s->sk_rmem_alloc), | |
1312 | s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); | |
1313 | ||
1314 | bh_unlock_sock(s); | |
1315 | } | |
1316 | return 0; | |
1317 | } | |
1318 | ||
1319 | static struct seq_operations nr_info_seqops = { | |
1320 | .start = nr_info_start, | |
1321 | .next = nr_info_next, | |
1322 | .stop = nr_info_stop, | |
1323 | .show = nr_info_show, | |
1324 | }; | |
1325 | ||
1326 | static int nr_info_open(struct inode *inode, struct file *file) | |
1327 | { | |
1328 | return seq_open(file, &nr_info_seqops); | |
1329 | } | |
1330 | ||
1331 | static struct file_operations nr_info_fops = { | |
1332 | .owner = THIS_MODULE, | |
1333 | .open = nr_info_open, | |
1334 | .read = seq_read, | |
1335 | .llseek = seq_lseek, | |
1336 | .release = seq_release, | |
1337 | }; | |
1338 | #endif /* CONFIG_PROC_FS */ | |
1339 | ||
1340 | static struct net_proto_family nr_family_ops = { | |
1341 | .family = PF_NETROM, | |
1342 | .create = nr_create, | |
1343 | .owner = THIS_MODULE, | |
1344 | }; | |
1345 | ||
90ddc4f0 | 1346 | static const struct proto_ops nr_proto_ops = { |
1da177e4 LT |
1347 | .family = PF_NETROM, |
1348 | .owner = THIS_MODULE, | |
1349 | .release = nr_release, | |
1350 | .bind = nr_bind, | |
1351 | .connect = nr_connect, | |
1352 | .socketpair = sock_no_socketpair, | |
1353 | .accept = nr_accept, | |
1354 | .getname = nr_getname, | |
1355 | .poll = datagram_poll, | |
1356 | .ioctl = nr_ioctl, | |
1357 | .listen = nr_listen, | |
1358 | .shutdown = sock_no_shutdown, | |
1359 | .setsockopt = nr_setsockopt, | |
1360 | .getsockopt = nr_getsockopt, | |
1361 | .sendmsg = nr_sendmsg, | |
1362 | .recvmsg = nr_recvmsg, | |
1363 | .mmap = sock_no_mmap, | |
1364 | .sendpage = sock_no_sendpage, | |
1365 | }; | |
1366 | ||
1367 | static struct notifier_block nr_dev_notifier = { | |
1368 | .notifier_call = nr_device_event, | |
1369 | }; | |
1370 | ||
1371 | static struct net_device **dev_nr; | |
1372 | ||
1da177e4 LT |
1373 | static int __init nr_proto_init(void) |
1374 | { | |
1375 | int i; | |
1376 | int rc = proto_register(&nr_proto, 0); | |
1377 | ||
1378 | if (rc != 0) | |
1379 | goto out; | |
1380 | ||
1381 | if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) { | |
1382 | printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n"); | |
1383 | return -1; | |
1384 | } | |
1385 | ||
1386 | dev_nr = kmalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL); | |
1387 | if (dev_nr == NULL) { | |
1388 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n"); | |
1389 | return -1; | |
1390 | } | |
1391 | ||
1392 | memset(dev_nr, 0x00, nr_ndevs * sizeof(struct net_device *)); | |
1393 | ||
1394 | for (i = 0; i < nr_ndevs; i++) { | |
1395 | char name[IFNAMSIZ]; | |
1396 | struct net_device *dev; | |
1397 | ||
1398 | sprintf(name, "nr%d", i); | |
b88a762b | 1399 | dev = alloc_netdev(sizeof(struct nr_private), name, nr_setup); |
1da177e4 LT |
1400 | if (!dev) { |
1401 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n"); | |
1402 | goto fail; | |
1403 | } | |
1404 | ||
1405 | dev->base_addr = i; | |
1406 | if (register_netdev(dev)) { | |
1407 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n"); | |
1408 | free_netdev(dev); | |
1409 | goto fail; | |
1410 | } | |
1411 | dev_nr[i] = dev; | |
1412 | } | |
1413 | ||
1414 | if (sock_register(&nr_family_ops)) { | |
1415 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n"); | |
1416 | goto fail; | |
1417 | } | |
1418 | ||
1419 | register_netdevice_notifier(&nr_dev_notifier); | |
1da177e4 LT |
1420 | |
1421 | ax25_protocol_register(AX25_P_NETROM, nr_route_frame); | |
1422 | ax25_linkfail_register(nr_link_failed); | |
1423 | ||
1424 | #ifdef CONFIG_SYSCTL | |
1425 | nr_register_sysctl(); | |
1426 | #endif | |
1427 | ||
1428 | nr_loopback_init(); | |
1429 | ||
1430 | proc_net_fops_create("nr", S_IRUGO, &nr_info_fops); | |
1431 | proc_net_fops_create("nr_neigh", S_IRUGO, &nr_neigh_fops); | |
1432 | proc_net_fops_create("nr_nodes", S_IRUGO, &nr_nodes_fops); | |
1433 | out: | |
1434 | return rc; | |
1435 | fail: | |
1436 | while (--i >= 0) { | |
1437 | unregister_netdev(dev_nr[i]); | |
1438 | free_netdev(dev_nr[i]); | |
1439 | } | |
1440 | kfree(dev_nr); | |
1441 | proto_unregister(&nr_proto); | |
1442 | rc = -1; | |
1443 | goto out; | |
1444 | } | |
1445 | ||
1446 | module_init(nr_proto_init); | |
1447 | ||
1448 | module_param(nr_ndevs, int, 0); | |
1449 | MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices"); | |
1450 | ||
1451 | MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); | |
1452 | MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol"); | |
1453 | MODULE_LICENSE("GPL"); | |
1454 | MODULE_ALIAS_NETPROTO(PF_NETROM); | |
1455 | ||
1456 | static void __exit nr_exit(void) | |
1457 | { | |
1458 | int i; | |
1459 | ||
1460 | proc_net_remove("nr"); | |
1461 | proc_net_remove("nr_neigh"); | |
1462 | proc_net_remove("nr_nodes"); | |
1463 | nr_loopback_clear(); | |
1464 | ||
1465 | nr_rt_free(); | |
1466 | ||
1467 | #ifdef CONFIG_SYSCTL | |
1468 | nr_unregister_sysctl(); | |
1469 | #endif | |
1470 | ||
1471 | ax25_linkfail_release(nr_link_failed); | |
1472 | ax25_protocol_release(AX25_P_NETROM); | |
1473 | ||
1474 | unregister_netdevice_notifier(&nr_dev_notifier); | |
1475 | ||
1476 | sock_unregister(PF_NETROM); | |
1477 | ||
1478 | for (i = 0; i < nr_ndevs; i++) { | |
1479 | struct net_device *dev = dev_nr[i]; | |
1480 | if (dev) { | |
1481 | unregister_netdev(dev); | |
1482 | free_netdev(dev); | |
1483 | } | |
1484 | } | |
1485 | ||
1486 | kfree(dev_nr); | |
1487 | proto_unregister(&nr_proto); | |
1488 | } | |
1489 | module_exit(nr_exit); |