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> | |
14 | #include <linux/errno.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/socket.h> | |
17 | #include <linux/in.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/sched.h> | |
20 | #include <linux/timer.h> | |
21 | #include <linux/string.h> | |
22 | #include <linux/sockios.h> | |
23 | #include <linux/net.h> | |
24 | #include <linux/stat.h> | |
25 | #include <net/ax25.h> | |
26 | #include <linux/inet.h> | |
27 | #include <linux/netdevice.h> | |
28 | #include <linux/if_arp.h> | |
29 | #include <linux/skbuff.h> | |
30 | #include <net/sock.h> | |
31 | #include <asm/uaccess.h> | |
32 | #include <asm/system.h> | |
33 | #include <linux/fcntl.h> | |
34 | #include <linux/termios.h> /* For TIOCINQ/OUTQ */ | |
35 | #include <linux/mm.h> | |
36 | #include <linux/interrupt.h> | |
37 | #include <linux/notifier.h> | |
38 | #include <net/netrom.h> | |
39 | #include <linux/proc_fs.h> | |
40 | #include <linux/seq_file.h> | |
41 | #include <net/ip.h> | |
c752f073 | 42 | #include <net/tcp_states.h> |
1da177e4 LT |
43 | #include <net/arp.h> |
44 | #include <linux/init.h> | |
45 | ||
46 | static int nr_ndevs = 4; | |
47 | ||
48 | int sysctl_netrom_default_path_quality = NR_DEFAULT_QUAL; | |
49 | int sysctl_netrom_obsolescence_count_initialiser = NR_DEFAULT_OBS; | |
50 | int sysctl_netrom_network_ttl_initialiser = NR_DEFAULT_TTL; | |
51 | int sysctl_netrom_transport_timeout = NR_DEFAULT_T1; | |
52 | int sysctl_netrom_transport_maximum_tries = NR_DEFAULT_N2; | |
53 | int sysctl_netrom_transport_acknowledge_delay = NR_DEFAULT_T2; | |
54 | int sysctl_netrom_transport_busy_delay = NR_DEFAULT_T4; | |
55 | int sysctl_netrom_transport_requested_window_size = NR_DEFAULT_WINDOW; | |
56 | int sysctl_netrom_transport_no_activity_timeout = NR_DEFAULT_IDLE; | |
57 | int sysctl_netrom_routing_control = NR_DEFAULT_ROUTING; | |
58 | int sysctl_netrom_link_fails_count = NR_DEFAULT_FAILS; | |
59 | ||
60 | static unsigned short circuit = 0x101; | |
61 | ||
62 | static HLIST_HEAD(nr_list); | |
63 | static DEFINE_SPINLOCK(nr_list_lock); | |
64 | ||
65 | static struct proto_ops nr_proto_ops; | |
66 | ||
67 | /* | |
68 | * Socket removal during an interrupt is now safe. | |
69 | */ | |
70 | static void nr_remove_socket(struct sock *sk) | |
71 | { | |
72 | spin_lock_bh(&nr_list_lock); | |
73 | sk_del_node_init(sk); | |
74 | spin_unlock_bh(&nr_list_lock); | |
75 | } | |
76 | ||
77 | /* | |
78 | * Kill all bound sockets on a dropped device. | |
79 | */ | |
80 | static void nr_kill_by_device(struct net_device *dev) | |
81 | { | |
82 | struct sock *s; | |
83 | struct hlist_node *node; | |
84 | ||
85 | spin_lock_bh(&nr_list_lock); | |
86 | sk_for_each(s, node, &nr_list) | |
87 | if (nr_sk(s)->device == dev) | |
88 | nr_disconnect(s, ENETUNREACH); | |
89 | spin_unlock_bh(&nr_list_lock); | |
90 | } | |
91 | ||
92 | /* | |
93 | * Handle device status changes. | |
94 | */ | |
95 | static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr) | |
96 | { | |
97 | struct net_device *dev = (struct net_device *)ptr; | |
98 | ||
99 | if (event != NETDEV_DOWN) | |
100 | return NOTIFY_DONE; | |
101 | ||
102 | nr_kill_by_device(dev); | |
103 | nr_rt_device_down(dev); | |
104 | ||
105 | return NOTIFY_DONE; | |
106 | } | |
107 | ||
108 | /* | |
109 | * Add a socket to the bound sockets list. | |
110 | */ | |
111 | static void nr_insert_socket(struct sock *sk) | |
112 | { | |
113 | spin_lock_bh(&nr_list_lock); | |
114 | sk_add_node(sk, &nr_list); | |
115 | spin_unlock_bh(&nr_list_lock); | |
116 | } | |
117 | ||
118 | /* | |
119 | * Find a socket that wants to accept the Connect Request we just | |
120 | * received. | |
121 | */ | |
122 | static struct sock *nr_find_listener(ax25_address *addr) | |
123 | { | |
124 | struct sock *s; | |
125 | struct hlist_node *node; | |
126 | ||
127 | spin_lock_bh(&nr_list_lock); | |
128 | sk_for_each(s, node, &nr_list) | |
129 | if (!ax25cmp(&nr_sk(s)->source_addr, addr) && | |
130 | s->sk_state == TCP_LISTEN) { | |
131 | bh_lock_sock(s); | |
132 | goto found; | |
133 | } | |
134 | s = NULL; | |
135 | found: | |
136 | spin_unlock_bh(&nr_list_lock); | |
137 | return s; | |
138 | } | |
139 | ||
140 | /* | |
141 | * Find a connected NET/ROM socket given my circuit IDs. | |
142 | */ | |
143 | static struct sock *nr_find_socket(unsigned char index, unsigned char id) | |
144 | { | |
145 | struct sock *s; | |
146 | struct hlist_node *node; | |
147 | ||
148 | spin_lock_bh(&nr_list_lock); | |
149 | sk_for_each(s, node, &nr_list) { | |
150 | struct nr_sock *nr = nr_sk(s); | |
151 | ||
152 | if (nr->my_index == index && nr->my_id == id) { | |
153 | bh_lock_sock(s); | |
154 | goto found; | |
155 | } | |
156 | } | |
157 | s = NULL; | |
158 | found: | |
159 | spin_unlock_bh(&nr_list_lock); | |
160 | return s; | |
161 | } | |
162 | ||
163 | /* | |
164 | * Find a connected NET/ROM socket given their circuit IDs. | |
165 | */ | |
166 | static struct sock *nr_find_peer(unsigned char index, unsigned char id, | |
167 | ax25_address *dest) | |
168 | { | |
169 | struct sock *s; | |
170 | struct hlist_node *node; | |
171 | ||
172 | spin_lock_bh(&nr_list_lock); | |
173 | sk_for_each(s, node, &nr_list) { | |
174 | struct nr_sock *nr = nr_sk(s); | |
175 | ||
176 | if (nr->your_index == index && nr->your_id == id && | |
177 | !ax25cmp(&nr->dest_addr, dest)) { | |
178 | bh_lock_sock(s); | |
179 | goto found; | |
180 | } | |
181 | } | |
182 | s = NULL; | |
183 | found: | |
184 | spin_unlock_bh(&nr_list_lock); | |
185 | return s; | |
186 | } | |
187 | ||
188 | /* | |
189 | * Find next free circuit ID. | |
190 | */ | |
191 | static unsigned short nr_find_next_circuit(void) | |
192 | { | |
193 | unsigned short id = circuit; | |
194 | unsigned char i, j; | |
195 | struct sock *sk; | |
196 | ||
197 | for (;;) { | |
198 | i = id / 256; | |
199 | j = id % 256; | |
200 | ||
201 | if (i != 0 && j != 0) { | |
202 | if ((sk=nr_find_socket(i, j)) == NULL) | |
203 | break; | |
204 | bh_unlock_sock(sk); | |
205 | } | |
206 | ||
207 | id++; | |
208 | } | |
209 | ||
210 | return id; | |
211 | } | |
212 | ||
213 | /* | |
214 | * Deferred destroy. | |
215 | */ | |
216 | void nr_destroy_socket(struct sock *); | |
217 | ||
218 | /* | |
219 | * Handler for deferred kills. | |
220 | */ | |
221 | static void nr_destroy_timer(unsigned long data) | |
222 | { | |
223 | struct sock *sk=(struct sock *)data; | |
224 | bh_lock_sock(sk); | |
225 | sock_hold(sk); | |
226 | nr_destroy_socket(sk); | |
227 | bh_unlock_sock(sk); | |
228 | sock_put(sk); | |
229 | } | |
230 | ||
231 | /* | |
232 | * This is called from user mode and the timers. Thus it protects itself | |
233 | * against interrupt users but doesn't worry about being called during | |
234 | * work. Once it is removed from the queue no interrupt or bottom half | |
235 | * will touch it and we are (fairly 8-) ) safe. | |
236 | */ | |
237 | void nr_destroy_socket(struct sock *sk) | |
238 | { | |
239 | struct sk_buff *skb; | |
240 | ||
241 | nr_remove_socket(sk); | |
242 | ||
243 | nr_stop_heartbeat(sk); | |
244 | nr_stop_t1timer(sk); | |
245 | nr_stop_t2timer(sk); | |
246 | nr_stop_t4timer(sk); | |
247 | nr_stop_idletimer(sk); | |
248 | ||
249 | nr_clear_queues(sk); /* Flush the queues */ | |
250 | ||
251 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
252 | if (skb->sk != sk) { /* A pending connection */ | |
253 | /* Queue the unaccepted socket for death */ | |
254 | sock_set_flag(skb->sk, SOCK_DEAD); | |
255 | nr_start_heartbeat(skb->sk); | |
256 | nr_sk(skb->sk)->state = NR_STATE_0; | |
257 | } | |
258 | ||
259 | kfree_skb(skb); | |
260 | } | |
261 | ||
262 | if (atomic_read(&sk->sk_wmem_alloc) || | |
263 | atomic_read(&sk->sk_rmem_alloc)) { | |
264 | /* Defer: outstanding buffers */ | |
265 | sk->sk_timer.function = nr_destroy_timer; | |
266 | sk->sk_timer.expires = jiffies + 2 * HZ; | |
267 | add_timer(&sk->sk_timer); | |
268 | } else | |
269 | sock_put(sk); | |
270 | } | |
271 | ||
272 | /* | |
273 | * Handling for system calls applied via the various interfaces to a | |
274 | * NET/ROM socket object. | |
275 | */ | |
276 | ||
277 | static int nr_setsockopt(struct socket *sock, int level, int optname, | |
278 | char __user *optval, int optlen) | |
279 | { | |
280 | struct sock *sk = sock->sk; | |
281 | struct nr_sock *nr = nr_sk(sk); | |
282 | int opt; | |
283 | ||
284 | if (level != SOL_NETROM) | |
285 | return -ENOPROTOOPT; | |
286 | ||
287 | if (optlen < sizeof(int)) | |
288 | return -EINVAL; | |
289 | ||
290 | if (get_user(opt, (int __user *)optval)) | |
291 | return -EFAULT; | |
292 | ||
293 | switch (optname) { | |
294 | case NETROM_T1: | |
295 | if (opt < 1) | |
296 | return -EINVAL; | |
297 | nr->t1 = opt * HZ; | |
298 | return 0; | |
299 | ||
300 | case NETROM_T2: | |
301 | if (opt < 1) | |
302 | return -EINVAL; | |
303 | nr->t2 = opt * HZ; | |
304 | return 0; | |
305 | ||
306 | case NETROM_N2: | |
307 | if (opt < 1 || opt > 31) | |
308 | return -EINVAL; | |
309 | nr->n2 = opt; | |
310 | return 0; | |
311 | ||
312 | case NETROM_T4: | |
313 | if (opt < 1) | |
314 | return -EINVAL; | |
315 | nr->t4 = opt * HZ; | |
316 | return 0; | |
317 | ||
318 | case NETROM_IDLE: | |
319 | if (opt < 0) | |
320 | return -EINVAL; | |
321 | nr->idle = opt * 60 * HZ; | |
322 | return 0; | |
323 | ||
324 | default: | |
325 | return -ENOPROTOOPT; | |
326 | } | |
327 | } | |
328 | ||
329 | static int nr_getsockopt(struct socket *sock, int level, int optname, | |
330 | char __user *optval, int __user *optlen) | |
331 | { | |
332 | struct sock *sk = sock->sk; | |
333 | struct nr_sock *nr = nr_sk(sk); | |
334 | int val = 0; | |
335 | int len; | |
336 | ||
337 | if (level != SOL_NETROM) | |
338 | return -ENOPROTOOPT; | |
339 | ||
340 | if (get_user(len, optlen)) | |
341 | return -EFAULT; | |
342 | ||
343 | if (len < 0) | |
344 | return -EINVAL; | |
345 | ||
346 | switch (optname) { | |
347 | case NETROM_T1: | |
348 | val = nr->t1 / HZ; | |
349 | break; | |
350 | ||
351 | case NETROM_T2: | |
352 | val = nr->t2 / HZ; | |
353 | break; | |
354 | ||
355 | case NETROM_N2: | |
356 | val = nr->n2; | |
357 | break; | |
358 | ||
359 | case NETROM_T4: | |
360 | val = nr->t4 / HZ; | |
361 | break; | |
362 | ||
363 | case NETROM_IDLE: | |
364 | val = nr->idle / (60 * HZ); | |
365 | break; | |
366 | ||
367 | default: | |
368 | return -ENOPROTOOPT; | |
369 | } | |
370 | ||
371 | len = min_t(unsigned int, len, sizeof(int)); | |
372 | ||
373 | if (put_user(len, optlen)) | |
374 | return -EFAULT; | |
375 | ||
376 | return copy_to_user(optval, &val, len) ? -EFAULT : 0; | |
377 | } | |
378 | ||
379 | static int nr_listen(struct socket *sock, int backlog) | |
380 | { | |
381 | struct sock *sk = sock->sk; | |
382 | ||
383 | lock_sock(sk); | |
384 | if (sk->sk_state != TCP_LISTEN) { | |
385 | memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN); | |
386 | sk->sk_max_ack_backlog = backlog; | |
387 | sk->sk_state = TCP_LISTEN; | |
388 | release_sock(sk); | |
389 | return 0; | |
390 | } | |
391 | release_sock(sk); | |
392 | ||
393 | return -EOPNOTSUPP; | |
394 | } | |
395 | ||
396 | static struct proto nr_proto = { | |
397 | .name = "NETROM", | |
398 | .owner = THIS_MODULE, | |
399 | .obj_size = sizeof(struct nr_sock), | |
400 | }; | |
401 | ||
402 | static int nr_create(struct socket *sock, int protocol) | |
403 | { | |
404 | struct sock *sk; | |
405 | struct nr_sock *nr; | |
406 | ||
407 | if (sock->type != SOCK_SEQPACKET || protocol != 0) | |
408 | return -ESOCKTNOSUPPORT; | |
409 | ||
410 | if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, &nr_proto, 1)) == NULL) | |
411 | return -ENOMEM; | |
412 | ||
413 | nr = nr_sk(sk); | |
414 | ||
415 | sock_init_data(sock, sk); | |
416 | ||
417 | sock->ops = &nr_proto_ops; | |
418 | sk->sk_protocol = protocol; | |
419 | ||
420 | skb_queue_head_init(&nr->ack_queue); | |
421 | skb_queue_head_init(&nr->reseq_queue); | |
422 | skb_queue_head_init(&nr->frag_queue); | |
423 | ||
424 | nr_init_timers(sk); | |
425 | ||
426 | nr->t1 = sysctl_netrom_transport_timeout; | |
427 | nr->t2 = sysctl_netrom_transport_acknowledge_delay; | |
428 | nr->n2 = sysctl_netrom_transport_maximum_tries; | |
429 | nr->t4 = sysctl_netrom_transport_busy_delay; | |
430 | nr->idle = sysctl_netrom_transport_no_activity_timeout; | |
431 | nr->window = sysctl_netrom_transport_requested_window_size; | |
432 | ||
433 | nr->bpqext = 1; | |
434 | nr->state = NR_STATE_0; | |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
439 | static struct sock *nr_make_new(struct sock *osk) | |
440 | { | |
441 | struct sock *sk; | |
442 | struct nr_sock *nr, *onr; | |
443 | ||
444 | if (osk->sk_type != SOCK_SEQPACKET) | |
445 | return NULL; | |
446 | ||
447 | if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, osk->sk_prot, 1)) == NULL) | |
448 | return NULL; | |
449 | ||
450 | nr = nr_sk(sk); | |
451 | ||
452 | sock_init_data(NULL, sk); | |
453 | ||
454 | sk->sk_type = osk->sk_type; | |
455 | sk->sk_socket = osk->sk_socket; | |
456 | sk->sk_priority = osk->sk_priority; | |
457 | sk->sk_protocol = osk->sk_protocol; | |
458 | sk->sk_rcvbuf = osk->sk_rcvbuf; | |
459 | sk->sk_sndbuf = osk->sk_sndbuf; | |
460 | sk->sk_state = TCP_ESTABLISHED; | |
461 | sk->sk_sleep = osk->sk_sleep; | |
53b924b3 | 462 | sock_copy_flags(sk, osk); |
1da177e4 LT |
463 | |
464 | skb_queue_head_init(&nr->ack_queue); | |
465 | skb_queue_head_init(&nr->reseq_queue); | |
466 | skb_queue_head_init(&nr->frag_queue); | |
467 | ||
468 | nr_init_timers(sk); | |
469 | ||
470 | onr = nr_sk(osk); | |
471 | ||
472 | nr->t1 = onr->t1; | |
473 | nr->t2 = onr->t2; | |
474 | nr->n2 = onr->n2; | |
475 | nr->t4 = onr->t4; | |
476 | nr->idle = onr->idle; | |
477 | nr->window = onr->window; | |
478 | ||
479 | nr->device = onr->device; | |
480 | nr->bpqext = onr->bpqext; | |
481 | ||
482 | return sk; | |
483 | } | |
484 | ||
485 | static int nr_release(struct socket *sock) | |
486 | { | |
487 | struct sock *sk = sock->sk; | |
488 | struct nr_sock *nr; | |
489 | ||
490 | if (sk == NULL) return 0; | |
491 | ||
492 | sock_hold(sk); | |
493 | lock_sock(sk); | |
494 | nr = nr_sk(sk); | |
495 | ||
496 | switch (nr->state) { | |
497 | case NR_STATE_0: | |
498 | case NR_STATE_1: | |
499 | case NR_STATE_2: | |
500 | nr_disconnect(sk, 0); | |
501 | nr_destroy_socket(sk); | |
502 | break; | |
503 | ||
504 | case NR_STATE_3: | |
505 | nr_clear_queues(sk); | |
506 | nr->n2count = 0; | |
507 | nr_write_internal(sk, NR_DISCREQ); | |
508 | nr_start_t1timer(sk); | |
509 | nr_stop_t2timer(sk); | |
510 | nr_stop_t4timer(sk); | |
511 | nr_stop_idletimer(sk); | |
512 | nr->state = NR_STATE_2; | |
513 | sk->sk_state = TCP_CLOSE; | |
514 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
515 | sk->sk_state_change(sk); | |
516 | sock_orphan(sk); | |
517 | sock_set_flag(sk, SOCK_DESTROY); | |
518 | sk->sk_socket = NULL; | |
519 | break; | |
520 | ||
521 | default: | |
522 | sk->sk_socket = NULL; | |
523 | break; | |
524 | } | |
525 | ||
526 | sock->sk = NULL; | |
527 | release_sock(sk); | |
528 | sock_put(sk); | |
529 | ||
530 | return 0; | |
531 | } | |
532 | ||
533 | static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
534 | { | |
535 | struct sock *sk = sock->sk; | |
536 | struct nr_sock *nr = nr_sk(sk); | |
537 | struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr; | |
538 | struct net_device *dev; | |
01d7dd0e RB |
539 | ax25_uid_assoc *user; |
540 | ax25_address *source; | |
1da177e4 LT |
541 | |
542 | lock_sock(sk); | |
543 | if (!sock_flag(sk, SOCK_ZAPPED)) { | |
544 | release_sock(sk); | |
545 | return -EINVAL; | |
546 | } | |
547 | if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) { | |
548 | release_sock(sk); | |
549 | return -EINVAL; | |
550 | } | |
551 | if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) { | |
552 | release_sock(sk); | |
553 | return -EINVAL; | |
554 | } | |
555 | if (addr->fsa_ax25.sax25_family != AF_NETROM) { | |
556 | release_sock(sk); | |
557 | return -EINVAL; | |
558 | } | |
559 | if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) { | |
560 | SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n"); | |
561 | release_sock(sk); | |
562 | return -EADDRNOTAVAIL; | |
563 | } | |
564 | ||
565 | /* | |
566 | * Only the super user can set an arbitrary user callsign. | |
567 | */ | |
568 | if (addr->fsa_ax25.sax25_ndigis == 1) { | |
569 | if (!capable(CAP_NET_BIND_SERVICE)) { | |
570 | dev_put(dev); | |
571 | release_sock(sk); | |
572 | return -EACCES; | |
573 | } | |
574 | nr->user_addr = addr->fsa_digipeater[0]; | |
575 | nr->source_addr = addr->fsa_ax25.sax25_call; | |
576 | } else { | |
577 | source = &addr->fsa_ax25.sax25_call; | |
578 | ||
01d7dd0e RB |
579 | user = ax25_findbyuid(current->euid); |
580 | if (user) { | |
581 | nr->user_addr = user->call; | |
582 | ax25_uid_put(user); | |
583 | } else { | |
1da177e4 LT |
584 | if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) { |
585 | release_sock(sk); | |
586 | dev_put(dev); | |
587 | return -EPERM; | |
588 | } | |
01d7dd0e | 589 | nr->user_addr = *source; |
1da177e4 LT |
590 | } |
591 | ||
1da177e4 LT |
592 | nr->source_addr = *source; |
593 | } | |
594 | ||
595 | nr->device = dev; | |
596 | nr_insert_socket(sk); | |
597 | ||
598 | sock_reset_flag(sk, SOCK_ZAPPED); | |
599 | dev_put(dev); | |
600 | release_sock(sk); | |
601 | SOCK_DEBUG(sk, "NET/ROM: socket is bound\n"); | |
602 | return 0; | |
603 | } | |
604 | ||
605 | static int nr_connect(struct socket *sock, struct sockaddr *uaddr, | |
606 | int addr_len, int flags) | |
607 | { | |
608 | struct sock *sk = sock->sk; | |
609 | struct nr_sock *nr = nr_sk(sk); | |
610 | struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr; | |
01d7dd0e RB |
611 | ax25_address *source = NULL; |
612 | ax25_uid_assoc *user; | |
1da177e4 LT |
613 | struct net_device *dev; |
614 | ||
615 | lock_sock(sk); | |
616 | if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { | |
617 | sock->state = SS_CONNECTED; | |
618 | release_sock(sk); | |
619 | return 0; /* Connect completed during a ERESTARTSYS event */ | |
620 | } | |
621 | ||
622 | if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { | |
623 | sock->state = SS_UNCONNECTED; | |
624 | release_sock(sk); | |
625 | return -ECONNREFUSED; | |
626 | } | |
627 | ||
628 | if (sk->sk_state == TCP_ESTABLISHED) { | |
629 | release_sock(sk); | |
630 | return -EISCONN; /* No reconnect on a seqpacket socket */ | |
631 | } | |
632 | ||
633 | sk->sk_state = TCP_CLOSE; | |
634 | sock->state = SS_UNCONNECTED; | |
635 | ||
636 | if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) { | |
637 | release_sock(sk); | |
638 | return -EINVAL; | |
639 | } | |
640 | if (addr->sax25_family != AF_NETROM) { | |
641 | release_sock(sk); | |
642 | return -EINVAL; | |
643 | } | |
644 | if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ | |
645 | sock_reset_flag(sk, SOCK_ZAPPED); | |
646 | ||
647 | if ((dev = nr_dev_first()) == NULL) { | |
648 | release_sock(sk); | |
649 | return -ENETUNREACH; | |
650 | } | |
651 | source = (ax25_address *)dev->dev_addr; | |
652 | ||
01d7dd0e RB |
653 | user = ax25_findbyuid(current->euid); |
654 | if (user) { | |
655 | nr->user_addr = user->call; | |
656 | ax25_uid_put(user); | |
657 | } else { | |
1da177e4 LT |
658 | if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) { |
659 | dev_put(dev); | |
660 | release_sock(sk); | |
661 | return -EPERM; | |
662 | } | |
01d7dd0e | 663 | nr->user_addr = *source; |
1da177e4 LT |
664 | } |
665 | ||
1da177e4 LT |
666 | nr->source_addr = *source; |
667 | nr->device = dev; | |
668 | ||
669 | dev_put(dev); | |
670 | nr_insert_socket(sk); /* Finish the bind */ | |
671 | } | |
672 | ||
673 | nr->dest_addr = addr->sax25_call; | |
674 | ||
675 | release_sock(sk); | |
676 | circuit = nr_find_next_circuit(); | |
677 | lock_sock(sk); | |
678 | ||
679 | nr->my_index = circuit / 256; | |
680 | nr->my_id = circuit % 256; | |
681 | ||
682 | circuit++; | |
683 | ||
684 | /* Move to connecting socket, start sending Connect Requests */ | |
685 | sock->state = SS_CONNECTING; | |
686 | sk->sk_state = TCP_SYN_SENT; | |
687 | ||
688 | nr_establish_data_link(sk); | |
689 | ||
690 | nr->state = NR_STATE_1; | |
691 | ||
692 | nr_start_heartbeat(sk); | |
693 | ||
694 | /* Now the loop */ | |
695 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { | |
696 | release_sock(sk); | |
697 | return -EINPROGRESS; | |
698 | } | |
699 | ||
700 | /* | |
701 | * A Connect Ack with Choke or timeout or failed routing will go to | |
702 | * closed. | |
703 | */ | |
704 | if (sk->sk_state == TCP_SYN_SENT) { | |
705 | struct task_struct *tsk = current; | |
706 | DECLARE_WAITQUEUE(wait, tsk); | |
707 | ||
708 | add_wait_queue(sk->sk_sleep, &wait); | |
709 | for (;;) { | |
710 | set_current_state(TASK_INTERRUPTIBLE); | |
711 | if (sk->sk_state != TCP_SYN_SENT) | |
712 | break; | |
713 | release_sock(sk); | |
714 | if (!signal_pending(tsk)) { | |
715 | schedule(); | |
716 | lock_sock(sk); | |
717 | continue; | |
718 | } | |
719 | current->state = TASK_RUNNING; | |
720 | remove_wait_queue(sk->sk_sleep, &wait); | |
721 | return -ERESTARTSYS; | |
722 | } | |
723 | current->state = TASK_RUNNING; | |
724 | remove_wait_queue(sk->sk_sleep, &wait); | |
725 | } | |
726 | ||
727 | if (sk->sk_state != TCP_ESTABLISHED) { | |
728 | sock->state = SS_UNCONNECTED; | |
729 | release_sock(sk); | |
730 | return sock_error(sk); /* Always set at this point */ | |
731 | } | |
732 | ||
733 | sock->state = SS_CONNECTED; | |
734 | release_sock(sk); | |
735 | ||
736 | return 0; | |
737 | } | |
738 | ||
739 | static int nr_accept(struct socket *sock, struct socket *newsock, int flags) | |
740 | { | |
741 | struct task_struct *tsk = current; | |
742 | DECLARE_WAITQUEUE(wait, tsk); | |
743 | struct sk_buff *skb; | |
744 | struct sock *newsk; | |
745 | struct sock *sk; | |
746 | int err = 0; | |
747 | ||
748 | if ((sk = sock->sk) == NULL) | |
749 | return -EINVAL; | |
750 | ||
751 | lock_sock(sk); | |
752 | if (sk->sk_type != SOCK_SEQPACKET) { | |
753 | err = -EOPNOTSUPP; | |
754 | goto out; | |
755 | } | |
756 | ||
757 | if (sk->sk_state != TCP_LISTEN) { | |
758 | err = -EINVAL; | |
759 | goto out; | |
760 | } | |
761 | ||
762 | /* | |
763 | * The write queue this time is holding sockets ready to use | |
764 | * hooked into the SABM we saved | |
765 | */ | |
766 | add_wait_queue(sk->sk_sleep, &wait); | |
767 | for (;;) { | |
768 | skb = skb_dequeue(&sk->sk_receive_queue); | |
769 | if (skb) | |
770 | break; | |
771 | ||
772 | current->state = TASK_INTERRUPTIBLE; | |
773 | release_sock(sk); | |
774 | if (flags & O_NONBLOCK) { | |
775 | current->state = TASK_RUNNING; | |
776 | remove_wait_queue(sk->sk_sleep, &wait); | |
777 | return -EWOULDBLOCK; | |
778 | } | |
779 | if (!signal_pending(tsk)) { | |
780 | schedule(); | |
781 | lock_sock(sk); | |
782 | continue; | |
783 | } | |
784 | current->state = TASK_RUNNING; | |
785 | remove_wait_queue(sk->sk_sleep, &wait); | |
786 | return -ERESTARTSYS; | |
787 | } | |
788 | current->state = TASK_RUNNING; | |
789 | remove_wait_queue(sk->sk_sleep, &wait); | |
790 | ||
791 | newsk = skb->sk; | |
792 | newsk->sk_socket = newsock; | |
793 | newsk->sk_sleep = &newsock->wait; | |
794 | ||
795 | /* Now attach up the new socket */ | |
796 | kfree_skb(skb); | |
797 | sk->sk_ack_backlog--; | |
798 | newsock->sk = newsk; | |
799 | ||
800 | out: | |
801 | release_sock(sk); | |
802 | return err; | |
803 | } | |
804 | ||
805 | static int nr_getname(struct socket *sock, struct sockaddr *uaddr, | |
806 | int *uaddr_len, int peer) | |
807 | { | |
808 | struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr; | |
809 | struct sock *sk = sock->sk; | |
810 | struct nr_sock *nr = nr_sk(sk); | |
811 | ||
812 | lock_sock(sk); | |
813 | if (peer != 0) { | |
814 | if (sk->sk_state != TCP_ESTABLISHED) { | |
815 | release_sock(sk); | |
816 | return -ENOTCONN; | |
817 | } | |
818 | sax->fsa_ax25.sax25_family = AF_NETROM; | |
819 | sax->fsa_ax25.sax25_ndigis = 1; | |
820 | sax->fsa_ax25.sax25_call = nr->user_addr; | |
821 | sax->fsa_digipeater[0] = nr->dest_addr; | |
822 | *uaddr_len = sizeof(struct full_sockaddr_ax25); | |
823 | } else { | |
824 | sax->fsa_ax25.sax25_family = AF_NETROM; | |
825 | sax->fsa_ax25.sax25_ndigis = 0; | |
826 | sax->fsa_ax25.sax25_call = nr->source_addr; | |
827 | *uaddr_len = sizeof(struct sockaddr_ax25); | |
828 | } | |
829 | release_sock(sk); | |
830 | ||
831 | return 0; | |
832 | } | |
833 | ||
834 | int nr_rx_frame(struct sk_buff *skb, struct net_device *dev) | |
835 | { | |
836 | struct sock *sk; | |
837 | struct sock *make; | |
838 | struct nr_sock *nr_make; | |
839 | ax25_address *src, *dest, *user; | |
840 | unsigned short circuit_index, circuit_id; | |
841 | unsigned short peer_circuit_index, peer_circuit_id; | |
842 | unsigned short frametype, flags, window, timeout; | |
843 | int ret; | |
844 | ||
845 | skb->sk = NULL; /* Initially we don't know who it's for */ | |
846 | ||
847 | /* | |
848 | * skb->data points to the netrom frame start | |
849 | */ | |
850 | ||
851 | src = (ax25_address *)(skb->data + 0); | |
852 | dest = (ax25_address *)(skb->data + 7); | |
853 | ||
854 | circuit_index = skb->data[15]; | |
855 | circuit_id = skb->data[16]; | |
856 | peer_circuit_index = skb->data[17]; | |
857 | peer_circuit_id = skb->data[18]; | |
858 | frametype = skb->data[19] & 0x0F; | |
859 | flags = skb->data[19] & 0xF0; | |
860 | ||
861 | #ifdef CONFIG_INET | |
862 | /* | |
863 | * Check for an incoming IP over NET/ROM frame. | |
864 | */ | |
865 | if (frametype == NR_PROTOEXT && circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) { | |
866 | skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN); | |
867 | skb->h.raw = skb->data; | |
868 | ||
869 | return nr_rx_ip(skb, dev); | |
870 | } | |
871 | #endif | |
872 | ||
873 | /* | |
874 | * Find an existing socket connection, based on circuit ID, if it's | |
875 | * a Connect Request base it on their circuit ID. | |
876 | * | |
877 | * Circuit ID 0/0 is not valid but it could still be a "reset" for a | |
878 | * circuit that no longer exists at the other end ... | |
879 | */ | |
880 | ||
881 | sk = NULL; | |
882 | ||
883 | if (circuit_index == 0 && circuit_id == 0) { | |
884 | if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG) | |
885 | sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src); | |
886 | } else { | |
887 | if (frametype == NR_CONNREQ) | |
888 | sk = nr_find_peer(circuit_index, circuit_id, src); | |
889 | else | |
890 | sk = nr_find_socket(circuit_index, circuit_id); | |
891 | } | |
892 | ||
893 | if (sk != NULL) { | |
894 | skb->h.raw = skb->data; | |
895 | ||
896 | if (frametype == NR_CONNACK && skb->len == 22) | |
897 | nr_sk(sk)->bpqext = 1; | |
898 | else | |
899 | nr_sk(sk)->bpqext = 0; | |
900 | ||
901 | ret = nr_process_rx_frame(sk, skb); | |
902 | bh_unlock_sock(sk); | |
903 | return ret; | |
904 | } | |
905 | ||
906 | /* | |
907 | * Now it should be a CONNREQ. | |
908 | */ | |
909 | if (frametype != NR_CONNREQ) { | |
910 | /* | |
911 | * Here it would be nice to be able to send a reset but | |
912 | * NET/ROM doesn't have one. The following hack would | |
913 | * have been a way to extend the protocol but apparently | |
914 | * it kills BPQ boxes... :-( | |
915 | */ | |
916 | #if 0 | |
917 | /* | |
918 | * Never reply to a CONNACK/CHOKE. | |
919 | */ | |
920 | if (frametype != NR_CONNACK || flags != NR_CHOKE_FLAG) | |
921 | nr_transmit_refusal(skb, 1); | |
922 | #endif | |
923 | return 0; | |
924 | } | |
925 | ||
926 | sk = nr_find_listener(dest); | |
927 | ||
928 | user = (ax25_address *)(skb->data + 21); | |
929 | ||
930 | if (sk == NULL || sk_acceptq_is_full(sk) || | |
931 | (make = nr_make_new(sk)) == NULL) { | |
932 | nr_transmit_refusal(skb, 0); | |
933 | if (sk) | |
934 | bh_unlock_sock(sk); | |
935 | return 0; | |
936 | } | |
937 | ||
938 | window = skb->data[20]; | |
939 | ||
940 | skb->sk = make; | |
941 | make->sk_state = TCP_ESTABLISHED; | |
942 | ||
943 | /* Fill in his circuit details */ | |
944 | nr_make = nr_sk(make); | |
945 | nr_make->source_addr = *dest; | |
946 | nr_make->dest_addr = *src; | |
947 | nr_make->user_addr = *user; | |
948 | ||
949 | nr_make->your_index = circuit_index; | |
950 | nr_make->your_id = circuit_id; | |
951 | ||
952 | bh_unlock_sock(sk); | |
953 | circuit = nr_find_next_circuit(); | |
954 | bh_lock_sock(sk); | |
955 | ||
956 | nr_make->my_index = circuit / 256; | |
957 | nr_make->my_id = circuit % 256; | |
958 | ||
959 | circuit++; | |
960 | ||
961 | /* Window negotiation */ | |
962 | if (window < nr_make->window) | |
963 | nr_make->window = window; | |
964 | ||
965 | /* L4 timeout negotiation */ | |
966 | if (skb->len == 37) { | |
967 | timeout = skb->data[36] * 256 + skb->data[35]; | |
968 | if (timeout * HZ < nr_make->t1) | |
969 | nr_make->t1 = timeout * HZ; | |
970 | nr_make->bpqext = 1; | |
971 | } else { | |
972 | nr_make->bpqext = 0; | |
973 | } | |
974 | ||
975 | nr_write_internal(make, NR_CONNACK); | |
976 | ||
977 | nr_make->condition = 0x00; | |
978 | nr_make->vs = 0; | |
979 | nr_make->va = 0; | |
980 | nr_make->vr = 0; | |
981 | nr_make->vl = 0; | |
982 | nr_make->state = NR_STATE_3; | |
983 | sk->sk_ack_backlog++; | |
984 | ||
985 | nr_insert_socket(make); | |
986 | ||
987 | skb_queue_head(&sk->sk_receive_queue, skb); | |
988 | ||
989 | nr_start_heartbeat(make); | |
990 | nr_start_idletimer(make); | |
991 | ||
992 | if (!sock_flag(sk, SOCK_DEAD)) | |
993 | sk->sk_data_ready(sk, skb->len); | |
994 | ||
995 | bh_unlock_sock(sk); | |
996 | return 1; | |
997 | } | |
998 | ||
999 | static int nr_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1000 | struct msghdr *msg, size_t len) | |
1001 | { | |
1002 | struct sock *sk = sock->sk; | |
1003 | struct nr_sock *nr = nr_sk(sk); | |
1004 | struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name; | |
1005 | int err; | |
1006 | struct sockaddr_ax25 sax; | |
1007 | struct sk_buff *skb; | |
1008 | unsigned char *asmptr; | |
1009 | int size; | |
1010 | ||
1011 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) | |
1012 | return -EINVAL; | |
1013 | ||
1014 | lock_sock(sk); | |
1015 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
1016 | err = -EADDRNOTAVAIL; | |
1017 | goto out; | |
1018 | } | |
1019 | ||
1020 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1021 | send_sig(SIGPIPE, current, 0); | |
1022 | err = -EPIPE; | |
1023 | goto out; | |
1024 | } | |
1025 | ||
1026 | if (nr->device == NULL) { | |
1027 | err = -ENETUNREACH; | |
1028 | goto out; | |
1029 | } | |
1030 | ||
1031 | if (usax) { | |
1032 | if (msg->msg_namelen < sizeof(sax)) { | |
1033 | err = -EINVAL; | |
1034 | goto out; | |
1035 | } | |
1036 | sax = *usax; | |
1037 | if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) { | |
1038 | err = -EISCONN; | |
1039 | goto out; | |
1040 | } | |
1041 | if (sax.sax25_family != AF_NETROM) { | |
1042 | err = -EINVAL; | |
1043 | goto out; | |
1044 | } | |
1045 | } else { | |
1046 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1047 | err = -ENOTCONN; | |
1048 | goto out; | |
1049 | } | |
1050 | sax.sax25_family = AF_NETROM; | |
1051 | sax.sax25_call = nr->dest_addr; | |
1052 | } | |
1053 | ||
1054 | SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n"); | |
1055 | ||
1056 | /* Build a packet */ | |
1057 | SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n"); | |
1058 | size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN; | |
1059 | ||
1060 | if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) | |
1061 | goto out; | |
1062 | ||
1063 | skb_reserve(skb, size - len); | |
1064 | ||
1065 | /* | |
1066 | * Push down the NET/ROM header | |
1067 | */ | |
1068 | ||
1069 | asmptr = skb_push(skb, NR_TRANSPORT_LEN); | |
1070 | SOCK_DEBUG(sk, "Building NET/ROM Header.\n"); | |
1071 | ||
1072 | /* Build a NET/ROM Transport header */ | |
1073 | ||
1074 | *asmptr++ = nr->your_index; | |
1075 | *asmptr++ = nr->your_id; | |
1076 | *asmptr++ = 0; /* To be filled in later */ | |
1077 | *asmptr++ = 0; /* Ditto */ | |
1078 | *asmptr++ = NR_INFO; | |
1079 | SOCK_DEBUG(sk, "Built header.\n"); | |
1080 | ||
1081 | /* | |
1082 | * Put the data on the end | |
1083 | */ | |
1084 | ||
1085 | skb->h.raw = skb_put(skb, len); | |
1086 | ||
1087 | asmptr = skb->h.raw; | |
1088 | SOCK_DEBUG(sk, "NET/ROM: Appending user data\n"); | |
1089 | ||
1090 | /* User data follows immediately after the NET/ROM transport header */ | |
1091 | if (memcpy_fromiovec(asmptr, msg->msg_iov, len)) { | |
1092 | kfree_skb(skb); | |
1093 | err = -EFAULT; | |
1094 | goto out; | |
1095 | } | |
1096 | ||
1097 | SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n"); | |
1098 | ||
1099 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1100 | kfree_skb(skb); | |
1101 | err = -ENOTCONN; | |
1102 | goto out; | |
1103 | } | |
1104 | ||
1105 | nr_output(sk, skb); /* Shove it onto the queue */ | |
1106 | ||
1107 | err = len; | |
1108 | out: | |
1109 | release_sock(sk); | |
1110 | return err; | |
1111 | } | |
1112 | ||
1113 | static int nr_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1114 | struct msghdr *msg, size_t size, int flags) | |
1115 | { | |
1116 | struct sock *sk = sock->sk; | |
1117 | struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name; | |
1118 | size_t copied; | |
1119 | struct sk_buff *skb; | |
1120 | int er; | |
1121 | ||
1122 | /* | |
1123 | * This works for seqpacket too. The receiver has ordered the queue for | |
1124 | * us! We do one quick check first though | |
1125 | */ | |
1126 | ||
1127 | lock_sock(sk); | |
1128 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1129 | release_sock(sk); | |
1130 | return -ENOTCONN; | |
1131 | } | |
1132 | ||
1133 | /* Now we can treat all alike */ | |
1134 | if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) { | |
1135 | release_sock(sk); | |
1136 | return er; | |
1137 | } | |
1138 | ||
1139 | skb->h.raw = skb->data; | |
1140 | copied = skb->len; | |
1141 | ||
1142 | if (copied > size) { | |
1143 | copied = size; | |
1144 | msg->msg_flags |= MSG_TRUNC; | |
1145 | } | |
1146 | ||
1147 | skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
1148 | ||
1149 | if (sax != NULL) { | |
1150 | sax->sax25_family = AF_NETROM; | |
1151 | memcpy(sax->sax25_call.ax25_call, skb->data + 7, AX25_ADDR_LEN); | |
1152 | } | |
1153 | ||
1154 | msg->msg_namelen = sizeof(*sax); | |
1155 | ||
1156 | skb_free_datagram(sk, skb); | |
1157 | ||
1158 | release_sock(sk); | |
1159 | return copied; | |
1160 | } | |
1161 | ||
1162 | ||
1163 | static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1164 | { | |
1165 | struct sock *sk = sock->sk; | |
1166 | void __user *argp = (void __user *)arg; | |
1167 | int ret; | |
1168 | ||
1169 | lock_sock(sk); | |
1170 | switch (cmd) { | |
1171 | case TIOCOUTQ: { | |
1172 | long amount; | |
1173 | amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); | |
1174 | if (amount < 0) | |
1175 | amount = 0; | |
1176 | release_sock(sk); | |
1177 | return put_user(amount, (int __user *)argp); | |
1178 | } | |
1179 | ||
1180 | case TIOCINQ: { | |
1181 | struct sk_buff *skb; | |
1182 | long amount = 0L; | |
1183 | /* These two are safe on a single CPU system as only user tasks fiddle here */ | |
1184 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) | |
1185 | amount = skb->len; | |
1186 | release_sock(sk); | |
1187 | return put_user(amount, (int __user *)argp); | |
1188 | } | |
1189 | ||
1190 | case SIOCGSTAMP: | |
1191 | ret = -EINVAL; | |
1192 | if (sk != NULL) | |
1193 | ret = sock_get_timestamp(sk, argp); | |
1194 | release_sock(sk); | |
1195 | return ret; | |
1196 | ||
1197 | case SIOCGIFADDR: | |
1198 | case SIOCSIFADDR: | |
1199 | case SIOCGIFDSTADDR: | |
1200 | case SIOCSIFDSTADDR: | |
1201 | case SIOCGIFBRDADDR: | |
1202 | case SIOCSIFBRDADDR: | |
1203 | case SIOCGIFNETMASK: | |
1204 | case SIOCSIFNETMASK: | |
1205 | case SIOCGIFMETRIC: | |
1206 | case SIOCSIFMETRIC: | |
1207 | release_sock(sk); | |
1208 | return -EINVAL; | |
1209 | ||
1210 | case SIOCADDRT: | |
1211 | case SIOCDELRT: | |
1212 | case SIOCNRDECOBS: | |
1213 | release_sock(sk); | |
1214 | if (!capable(CAP_NET_ADMIN)) return -EPERM; | |
1215 | return nr_rt_ioctl(cmd, argp); | |
1216 | ||
1217 | default: | |
1218 | release_sock(sk); | |
1219 | return dev_ioctl(cmd, argp); | |
1220 | } | |
1221 | release_sock(sk); | |
1222 | ||
1223 | return 0; | |
1224 | } | |
1225 | ||
1226 | #ifdef CONFIG_PROC_FS | |
1227 | ||
1228 | static void *nr_info_start(struct seq_file *seq, loff_t *pos) | |
1229 | { | |
1230 | struct sock *s; | |
1231 | struct hlist_node *node; | |
1232 | int i = 1; | |
1233 | ||
1234 | spin_lock_bh(&nr_list_lock); | |
1235 | if (*pos == 0) | |
1236 | return SEQ_START_TOKEN; | |
1237 | ||
1238 | sk_for_each(s, node, &nr_list) { | |
1239 | if (i == *pos) | |
1240 | return s; | |
1241 | ++i; | |
1242 | } | |
1243 | return NULL; | |
1244 | } | |
1245 | ||
1246 | static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos) | |
1247 | { | |
1248 | ++*pos; | |
1249 | ||
1250 | return (v == SEQ_START_TOKEN) ? sk_head(&nr_list) | |
1251 | : sk_next((struct sock *)v); | |
1252 | } | |
1253 | ||
1254 | static void nr_info_stop(struct seq_file *seq, void *v) | |
1255 | { | |
1256 | spin_unlock_bh(&nr_list_lock); | |
1257 | } | |
1258 | ||
1259 | static int nr_info_show(struct seq_file *seq, void *v) | |
1260 | { | |
1261 | struct sock *s = v; | |
1262 | struct net_device *dev; | |
1263 | struct nr_sock *nr; | |
1264 | const char *devname; | |
1265 | ||
1266 | if (v == SEQ_START_TOKEN) | |
1267 | seq_puts(seq, | |
1268 | "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"); | |
1269 | ||
1270 | else { | |
1271 | ||
1272 | bh_lock_sock(s); | |
1273 | nr = nr_sk(s); | |
1274 | ||
1275 | if ((dev = nr->device) == NULL) | |
1276 | devname = "???"; | |
1277 | else | |
1278 | devname = dev->name; | |
1279 | ||
1280 | seq_printf(seq, "%-9s ", ax2asc(&nr->user_addr)); | |
1281 | seq_printf(seq, "%-9s ", ax2asc(&nr->dest_addr)); | |
1282 | seq_printf(seq, | |
1283 | "%-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", | |
1284 | ax2asc(&nr->source_addr), | |
1285 | devname, | |
1286 | nr->my_index, | |
1287 | nr->my_id, | |
1288 | nr->your_index, | |
1289 | nr->your_id, | |
1290 | nr->state, | |
1291 | nr->vs, | |
1292 | nr->vr, | |
1293 | nr->va, | |
1294 | ax25_display_timer(&nr->t1timer) / HZ, | |
1295 | nr->t1 / HZ, | |
1296 | ax25_display_timer(&nr->t2timer) / HZ, | |
1297 | nr->t2 / HZ, | |
1298 | ax25_display_timer(&nr->t4timer) / HZ, | |
1299 | nr->t4 / HZ, | |
1300 | ax25_display_timer(&nr->idletimer) / (60 * HZ), | |
1301 | nr->idle / (60 * HZ), | |
1302 | nr->n2count, | |
1303 | nr->n2, | |
1304 | nr->window, | |
1305 | atomic_read(&s->sk_wmem_alloc), | |
1306 | atomic_read(&s->sk_rmem_alloc), | |
1307 | s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); | |
1308 | ||
1309 | bh_unlock_sock(s); | |
1310 | } | |
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | static struct seq_operations nr_info_seqops = { | |
1315 | .start = nr_info_start, | |
1316 | .next = nr_info_next, | |
1317 | .stop = nr_info_stop, | |
1318 | .show = nr_info_show, | |
1319 | }; | |
1320 | ||
1321 | static int nr_info_open(struct inode *inode, struct file *file) | |
1322 | { | |
1323 | return seq_open(file, &nr_info_seqops); | |
1324 | } | |
1325 | ||
1326 | static struct file_operations nr_info_fops = { | |
1327 | .owner = THIS_MODULE, | |
1328 | .open = nr_info_open, | |
1329 | .read = seq_read, | |
1330 | .llseek = seq_lseek, | |
1331 | .release = seq_release, | |
1332 | }; | |
1333 | #endif /* CONFIG_PROC_FS */ | |
1334 | ||
1335 | static struct net_proto_family nr_family_ops = { | |
1336 | .family = PF_NETROM, | |
1337 | .create = nr_create, | |
1338 | .owner = THIS_MODULE, | |
1339 | }; | |
1340 | ||
1341 | static struct proto_ops nr_proto_ops = { | |
1342 | .family = PF_NETROM, | |
1343 | .owner = THIS_MODULE, | |
1344 | .release = nr_release, | |
1345 | .bind = nr_bind, | |
1346 | .connect = nr_connect, | |
1347 | .socketpair = sock_no_socketpair, | |
1348 | .accept = nr_accept, | |
1349 | .getname = nr_getname, | |
1350 | .poll = datagram_poll, | |
1351 | .ioctl = nr_ioctl, | |
1352 | .listen = nr_listen, | |
1353 | .shutdown = sock_no_shutdown, | |
1354 | .setsockopt = nr_setsockopt, | |
1355 | .getsockopt = nr_getsockopt, | |
1356 | .sendmsg = nr_sendmsg, | |
1357 | .recvmsg = nr_recvmsg, | |
1358 | .mmap = sock_no_mmap, | |
1359 | .sendpage = sock_no_sendpage, | |
1360 | }; | |
1361 | ||
1362 | static struct notifier_block nr_dev_notifier = { | |
1363 | .notifier_call = nr_device_event, | |
1364 | }; | |
1365 | ||
1366 | static struct net_device **dev_nr; | |
1367 | ||
1368 | static char banner[] __initdata = KERN_INFO "G4KLX NET/ROM for Linux. Version 0.7 for AX25.037 Linux 2.4\n"; | |
1369 | ||
1370 | static int __init nr_proto_init(void) | |
1371 | { | |
1372 | int i; | |
1373 | int rc = proto_register(&nr_proto, 0); | |
1374 | ||
1375 | if (rc != 0) | |
1376 | goto out; | |
1377 | ||
1378 | if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) { | |
1379 | printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n"); | |
1380 | return -1; | |
1381 | } | |
1382 | ||
1383 | dev_nr = kmalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL); | |
1384 | if (dev_nr == NULL) { | |
1385 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n"); | |
1386 | return -1; | |
1387 | } | |
1388 | ||
1389 | memset(dev_nr, 0x00, nr_ndevs * sizeof(struct net_device *)); | |
1390 | ||
1391 | for (i = 0; i < nr_ndevs; i++) { | |
1392 | char name[IFNAMSIZ]; | |
1393 | struct net_device *dev; | |
1394 | ||
1395 | sprintf(name, "nr%d", i); | |
1396 | dev = alloc_netdev(sizeof(struct net_device_stats), name, | |
1397 | nr_setup); | |
1398 | if (!dev) { | |
1399 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n"); | |
1400 | goto fail; | |
1401 | } | |
1402 | ||
1403 | dev->base_addr = i; | |
1404 | if (register_netdev(dev)) { | |
1405 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n"); | |
1406 | free_netdev(dev); | |
1407 | goto fail; | |
1408 | } | |
1409 | dev_nr[i] = dev; | |
1410 | } | |
1411 | ||
1412 | if (sock_register(&nr_family_ops)) { | |
1413 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n"); | |
1414 | goto fail; | |
1415 | } | |
1416 | ||
1417 | register_netdevice_notifier(&nr_dev_notifier); | |
1418 | printk(banner); | |
1419 | ||
1420 | ax25_protocol_register(AX25_P_NETROM, nr_route_frame); | |
1421 | ax25_linkfail_register(nr_link_failed); | |
1422 | ||
1423 | #ifdef CONFIG_SYSCTL | |
1424 | nr_register_sysctl(); | |
1425 | #endif | |
1426 | ||
1427 | nr_loopback_init(); | |
1428 | ||
1429 | proc_net_fops_create("nr", S_IRUGO, &nr_info_fops); | |
1430 | proc_net_fops_create("nr_neigh", S_IRUGO, &nr_neigh_fops); | |
1431 | proc_net_fops_create("nr_nodes", S_IRUGO, &nr_nodes_fops); | |
1432 | out: | |
1433 | return rc; | |
1434 | fail: | |
1435 | while (--i >= 0) { | |
1436 | unregister_netdev(dev_nr[i]); | |
1437 | free_netdev(dev_nr[i]); | |
1438 | } | |
1439 | kfree(dev_nr); | |
1440 | proto_unregister(&nr_proto); | |
1441 | rc = -1; | |
1442 | goto out; | |
1443 | } | |
1444 | ||
1445 | module_init(nr_proto_init); | |
1446 | ||
1447 | module_param(nr_ndevs, int, 0); | |
1448 | MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices"); | |
1449 | ||
1450 | MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); | |
1451 | MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol"); | |
1452 | MODULE_LICENSE("GPL"); | |
1453 | MODULE_ALIAS_NETPROTO(PF_NETROM); | |
1454 | ||
1455 | static void __exit nr_exit(void) | |
1456 | { | |
1457 | int i; | |
1458 | ||
1459 | proc_net_remove("nr"); | |
1460 | proc_net_remove("nr_neigh"); | |
1461 | proc_net_remove("nr_nodes"); | |
1462 | nr_loopback_clear(); | |
1463 | ||
1464 | nr_rt_free(); | |
1465 | ||
1466 | #ifdef CONFIG_SYSCTL | |
1467 | nr_unregister_sysctl(); | |
1468 | #endif | |
1469 | ||
1470 | ax25_linkfail_release(nr_link_failed); | |
1471 | ax25_protocol_release(AX25_P_NETROM); | |
1472 | ||
1473 | unregister_netdevice_notifier(&nr_dev_notifier); | |
1474 | ||
1475 | sock_unregister(PF_NETROM); | |
1476 | ||
1477 | for (i = 0; i < nr_ndevs; i++) { | |
1478 | struct net_device *dev = dev_nr[i]; | |
1479 | if (dev) { | |
1480 | unregister_netdev(dev); | |
1481 | free_netdev(dev); | |
1482 | } | |
1483 | } | |
1484 | ||
1485 | kfree(dev_nr); | |
1486 | proto_unregister(&nr_proto); | |
1487 | } | |
1488 | module_exit(nr_exit); |