Root/
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/module.h> |
12 | #include <linux/moduleparam.h> |
13 | #include <linux/capability.h> |
14 | #include <linux/errno.h> |
15 | #include <linux/types.h> |
16 | #include <linux/socket.h> |
17 | #include <linux/in.h> |
18 | #include <linux/slab.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/net_namespace.h> |
32 | #include <net/sock.h> |
33 | #include <asm/uaccess.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> |
43 | #include <net/tcp_states.h> |
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; |
60 | int sysctl_netrom_reset_circuit = NR_DEFAULT_RESET; |
61 | |
62 | static unsigned short circuit = 0x101; |
63 | |
64 | static HLIST_HEAD(nr_list); |
65 | static DEFINE_SPINLOCK(nr_list_lock); |
66 | |
67 | static const struct proto_ops nr_proto_ops; |
68 | |
69 | /* |
70 | * NETROM network devices are virtual network devices encapsulating NETROM |
71 | * frames into AX.25 which will be sent through an AX.25 device, so form a |
72 | * special "super class" of normal net devices; split their locks off into a |
73 | * separate class since they always nest. |
74 | */ |
75 | static struct lock_class_key nr_netdev_xmit_lock_key; |
76 | static struct lock_class_key nr_netdev_addr_lock_key; |
77 | |
78 | static void nr_set_lockdep_one(struct net_device *dev, |
79 | struct netdev_queue *txq, |
80 | void *_unused) |
81 | { |
82 | lockdep_set_class(&txq->_xmit_lock, &nr_netdev_xmit_lock_key); |
83 | } |
84 | |
85 | static void nr_set_lockdep_key(struct net_device *dev) |
86 | { |
87 | lockdep_set_class(&dev->addr_list_lock, &nr_netdev_addr_lock_key); |
88 | netdev_for_each_tx_queue(dev, nr_set_lockdep_one, NULL); |
89 | } |
90 | |
91 | /* |
92 | * Socket removal during an interrupt is now safe. |
93 | */ |
94 | static void nr_remove_socket(struct sock *sk) |
95 | { |
96 | spin_lock_bh(&nr_list_lock); |
97 | sk_del_node_init(sk); |
98 | spin_unlock_bh(&nr_list_lock); |
99 | } |
100 | |
101 | /* |
102 | * Kill all bound sockets on a dropped device. |
103 | */ |
104 | static void nr_kill_by_device(struct net_device *dev) |
105 | { |
106 | struct sock *s; |
107 | |
108 | spin_lock_bh(&nr_list_lock); |
109 | sk_for_each(s, &nr_list) |
110 | if (nr_sk(s)->device == dev) |
111 | nr_disconnect(s, ENETUNREACH); |
112 | spin_unlock_bh(&nr_list_lock); |
113 | } |
114 | |
115 | /* |
116 | * Handle device status changes. |
117 | */ |
118 | static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr) |
119 | { |
120 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
121 | |
122 | if (!net_eq(dev_net(dev), &init_net)) |
123 | return NOTIFY_DONE; |
124 | |
125 | if (event != NETDEV_DOWN) |
126 | return NOTIFY_DONE; |
127 | |
128 | nr_kill_by_device(dev); |
129 | nr_rt_device_down(dev); |
130 | |
131 | return NOTIFY_DONE; |
132 | } |
133 | |
134 | /* |
135 | * Add a socket to the bound sockets list. |
136 | */ |
137 | static void nr_insert_socket(struct sock *sk) |
138 | { |
139 | spin_lock_bh(&nr_list_lock); |
140 | sk_add_node(sk, &nr_list); |
141 | spin_unlock_bh(&nr_list_lock); |
142 | } |
143 | |
144 | /* |
145 | * Find a socket that wants to accept the Connect Request we just |
146 | * received. |
147 | */ |
148 | static struct sock *nr_find_listener(ax25_address *addr) |
149 | { |
150 | struct sock *s; |
151 | |
152 | spin_lock_bh(&nr_list_lock); |
153 | sk_for_each(s, &nr_list) |
154 | if (!ax25cmp(&nr_sk(s)->source_addr, addr) && |
155 | s->sk_state == TCP_LISTEN) { |
156 | bh_lock_sock(s); |
157 | goto found; |
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 my circuit IDs. |
167 | */ |
168 | static struct sock *nr_find_socket(unsigned char index, unsigned char id) |
169 | { |
170 | struct sock *s; |
171 | |
172 | spin_lock_bh(&nr_list_lock); |
173 | sk_for_each(s, &nr_list) { |
174 | struct nr_sock *nr = nr_sk(s); |
175 | |
176 | if (nr->my_index == index && nr->my_id == id) { |
177 | bh_lock_sock(s); |
178 | goto found; |
179 | } |
180 | } |
181 | s = NULL; |
182 | found: |
183 | spin_unlock_bh(&nr_list_lock); |
184 | return s; |
185 | } |
186 | |
187 | /* |
188 | * Find a connected NET/ROM socket given their circuit IDs. |
189 | */ |
190 | static struct sock *nr_find_peer(unsigned char index, unsigned char id, |
191 | ax25_address *dest) |
192 | { |
193 | struct sock *s; |
194 | |
195 | spin_lock_bh(&nr_list_lock); |
196 | sk_for_each(s, &nr_list) { |
197 | struct nr_sock *nr = nr_sk(s); |
198 | |
199 | if (nr->your_index == index && nr->your_id == id && |
200 | !ax25cmp(&nr->dest_addr, dest)) { |
201 | bh_lock_sock(s); |
202 | goto found; |
203 | } |
204 | } |
205 | s = NULL; |
206 | found: |
207 | spin_unlock_bh(&nr_list_lock); |
208 | return s; |
209 | } |
210 | |
211 | /* |
212 | * Find next free circuit ID. |
213 | */ |
214 | static unsigned short nr_find_next_circuit(void) |
215 | { |
216 | unsigned short id = circuit; |
217 | unsigned char i, j; |
218 | struct sock *sk; |
219 | |
220 | for (;;) { |
221 | i = id / 256; |
222 | j = id % 256; |
223 | |
224 | if (i != 0 && j != 0) { |
225 | if ((sk=nr_find_socket(i, j)) == NULL) |
226 | break; |
227 | bh_unlock_sock(sk); |
228 | } |
229 | |
230 | id++; |
231 | } |
232 | |
233 | return id; |
234 | } |
235 | |
236 | /* |
237 | * Deferred destroy. |
238 | */ |
239 | void nr_destroy_socket(struct sock *); |
240 | |
241 | /* |
242 | * Handler for deferred kills. |
243 | */ |
244 | static void nr_destroy_timer(unsigned long data) |
245 | { |
246 | struct sock *sk=(struct sock *)data; |
247 | bh_lock_sock(sk); |
248 | sock_hold(sk); |
249 | nr_destroy_socket(sk); |
250 | bh_unlock_sock(sk); |
251 | sock_put(sk); |
252 | } |
253 | |
254 | /* |
255 | * This is called from user mode and the timers. Thus it protects itself |
256 | * against interrupt users but doesn't worry about being called during |
257 | * work. Once it is removed from the queue no interrupt or bottom half |
258 | * will touch it and we are (fairly 8-) ) safe. |
259 | */ |
260 | void nr_destroy_socket(struct sock *sk) |
261 | { |
262 | struct sk_buff *skb; |
263 | |
264 | nr_remove_socket(sk); |
265 | |
266 | nr_stop_heartbeat(sk); |
267 | nr_stop_t1timer(sk); |
268 | nr_stop_t2timer(sk); |
269 | nr_stop_t4timer(sk); |
270 | nr_stop_idletimer(sk); |
271 | |
272 | nr_clear_queues(sk); /* Flush the queues */ |
273 | |
274 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { |
275 | if (skb->sk != sk) { /* A pending connection */ |
276 | /* Queue the unaccepted socket for death */ |
277 | sock_set_flag(skb->sk, SOCK_DEAD); |
278 | nr_start_heartbeat(skb->sk); |
279 | nr_sk(skb->sk)->state = NR_STATE_0; |
280 | } |
281 | |
282 | kfree_skb(skb); |
283 | } |
284 | |
285 | if (sk_has_allocations(sk)) { |
286 | /* Defer: outstanding buffers */ |
287 | sk->sk_timer.function = nr_destroy_timer; |
288 | sk->sk_timer.expires = jiffies + 2 * HZ; |
289 | add_timer(&sk->sk_timer); |
290 | } else |
291 | sock_put(sk); |
292 | } |
293 | |
294 | /* |
295 | * Handling for system calls applied via the various interfaces to a |
296 | * NET/ROM socket object. |
297 | */ |
298 | |
299 | static int nr_setsockopt(struct socket *sock, int level, int optname, |
300 | char __user *optval, unsigned int optlen) |
301 | { |
302 | struct sock *sk = sock->sk; |
303 | struct nr_sock *nr = nr_sk(sk); |
304 | unsigned long opt; |
305 | |
306 | if (level != SOL_NETROM) |
307 | return -ENOPROTOOPT; |
308 | |
309 | if (optlen < sizeof(unsigned int)) |
310 | return -EINVAL; |
311 | |
312 | if (get_user(opt, (unsigned int __user *)optval)) |
313 | return -EFAULT; |
314 | |
315 | switch (optname) { |
316 | case NETROM_T1: |
317 | if (opt < 1 || opt > ULONG_MAX / HZ) |
318 | return -EINVAL; |
319 | nr->t1 = opt * HZ; |
320 | return 0; |
321 | |
322 | case NETROM_T2: |
323 | if (opt < 1 || opt > ULONG_MAX / HZ) |
324 | return -EINVAL; |
325 | nr->t2 = opt * HZ; |
326 | return 0; |
327 | |
328 | case NETROM_N2: |
329 | if (opt < 1 || opt > 31) |
330 | return -EINVAL; |
331 | nr->n2 = opt; |
332 | return 0; |
333 | |
334 | case NETROM_T4: |
335 | if (opt < 1 || opt > ULONG_MAX / HZ) |
336 | return -EINVAL; |
337 | nr->t4 = opt * HZ; |
338 | return 0; |
339 | |
340 | case NETROM_IDLE: |
341 | if (opt > ULONG_MAX / (60 * HZ)) |
342 | return -EINVAL; |
343 | nr->idle = opt * 60 * HZ; |
344 | return 0; |
345 | |
346 | default: |
347 | return -ENOPROTOOPT; |
348 | } |
349 | } |
350 | |
351 | static int nr_getsockopt(struct socket *sock, int level, int optname, |
352 | char __user *optval, int __user *optlen) |
353 | { |
354 | struct sock *sk = sock->sk; |
355 | struct nr_sock *nr = nr_sk(sk); |
356 | int val = 0; |
357 | int len; |
358 | |
359 | if (level != SOL_NETROM) |
360 | return -ENOPROTOOPT; |
361 | |
362 | if (get_user(len, optlen)) |
363 | return -EFAULT; |
364 | |
365 | if (len < 0) |
366 | return -EINVAL; |
367 | |
368 | switch (optname) { |
369 | case NETROM_T1: |
370 | val = nr->t1 / HZ; |
371 | break; |
372 | |
373 | case NETROM_T2: |
374 | val = nr->t2 / HZ; |
375 | break; |
376 | |
377 | case NETROM_N2: |
378 | val = nr->n2; |
379 | break; |
380 | |
381 | case NETROM_T4: |
382 | val = nr->t4 / HZ; |
383 | break; |
384 | |
385 | case NETROM_IDLE: |
386 | val = nr->idle / (60 * HZ); |
387 | break; |
388 | |
389 | default: |
390 | return -ENOPROTOOPT; |
391 | } |
392 | |
393 | len = min_t(unsigned int, len, sizeof(int)); |
394 | |
395 | if (put_user(len, optlen)) |
396 | return -EFAULT; |
397 | |
398 | return copy_to_user(optval, &val, len) ? -EFAULT : 0; |
399 | } |
400 | |
401 | static int nr_listen(struct socket *sock, int backlog) |
402 | { |
403 | struct sock *sk = sock->sk; |
404 | |
405 | lock_sock(sk); |
406 | if (sk->sk_state != TCP_LISTEN) { |
407 | memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN); |
408 | sk->sk_max_ack_backlog = backlog; |
409 | sk->sk_state = TCP_LISTEN; |
410 | release_sock(sk); |
411 | return 0; |
412 | } |
413 | release_sock(sk); |
414 | |
415 | return -EOPNOTSUPP; |
416 | } |
417 | |
418 | static struct proto nr_proto = { |
419 | .name = "NETROM", |
420 | .owner = THIS_MODULE, |
421 | .obj_size = sizeof(struct nr_sock), |
422 | }; |
423 | |
424 | static int nr_create(struct net *net, struct socket *sock, int protocol, |
425 | int kern) |
426 | { |
427 | struct sock *sk; |
428 | struct nr_sock *nr; |
429 | |
430 | if (!net_eq(net, &init_net)) |
431 | return -EAFNOSUPPORT; |
432 | |
433 | if (sock->type != SOCK_SEQPACKET || protocol != 0) |
434 | return -ESOCKTNOSUPPORT; |
435 | |
436 | sk = sk_alloc(net, PF_NETROM, GFP_ATOMIC, &nr_proto); |
437 | if (sk == NULL) |
438 | return -ENOMEM; |
439 | |
440 | nr = nr_sk(sk); |
441 | |
442 | sock_init_data(sock, sk); |
443 | |
444 | sock->ops = &nr_proto_ops; |
445 | sk->sk_protocol = protocol; |
446 | |
447 | skb_queue_head_init(&nr->ack_queue); |
448 | skb_queue_head_init(&nr->reseq_queue); |
449 | skb_queue_head_init(&nr->frag_queue); |
450 | |
451 | nr_init_timers(sk); |
452 | |
453 | nr->t1 = |
454 | msecs_to_jiffies(sysctl_netrom_transport_timeout); |
455 | nr->t2 = |
456 | msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay); |
457 | nr->n2 = |
458 | msecs_to_jiffies(sysctl_netrom_transport_maximum_tries); |
459 | nr->t4 = |
460 | msecs_to_jiffies(sysctl_netrom_transport_busy_delay); |
461 | nr->idle = |
462 | msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout); |
463 | nr->window = sysctl_netrom_transport_requested_window_size; |
464 | |
465 | nr->bpqext = 1; |
466 | nr->state = NR_STATE_0; |
467 | |
468 | return 0; |
469 | } |
470 | |
471 | static struct sock *nr_make_new(struct sock *osk) |
472 | { |
473 | struct sock *sk; |
474 | struct nr_sock *nr, *onr; |
475 | |
476 | if (osk->sk_type != SOCK_SEQPACKET) |
477 | return NULL; |
478 | |
479 | sk = sk_alloc(sock_net(osk), PF_NETROM, GFP_ATOMIC, osk->sk_prot); |
480 | if (sk == NULL) |
481 | return NULL; |
482 | |
483 | nr = nr_sk(sk); |
484 | |
485 | sock_init_data(NULL, sk); |
486 | |
487 | sk->sk_type = osk->sk_type; |
488 | sk->sk_priority = osk->sk_priority; |
489 | sk->sk_protocol = osk->sk_protocol; |
490 | sk->sk_rcvbuf = osk->sk_rcvbuf; |
491 | sk->sk_sndbuf = osk->sk_sndbuf; |
492 | sk->sk_state = TCP_ESTABLISHED; |
493 | sock_copy_flags(sk, osk); |
494 | |
495 | skb_queue_head_init(&nr->ack_queue); |
496 | skb_queue_head_init(&nr->reseq_queue); |
497 | skb_queue_head_init(&nr->frag_queue); |
498 | |
499 | nr_init_timers(sk); |
500 | |
501 | onr = nr_sk(osk); |
502 | |
503 | nr->t1 = onr->t1; |
504 | nr->t2 = onr->t2; |
505 | nr->n2 = onr->n2; |
506 | nr->t4 = onr->t4; |
507 | nr->idle = onr->idle; |
508 | nr->window = onr->window; |
509 | |
510 | nr->device = onr->device; |
511 | nr->bpqext = onr->bpqext; |
512 | |
513 | return sk; |
514 | } |
515 | |
516 | static int nr_release(struct socket *sock) |
517 | { |
518 | struct sock *sk = sock->sk; |
519 | struct nr_sock *nr; |
520 | |
521 | if (sk == NULL) return 0; |
522 | |
523 | sock_hold(sk); |
524 | sock_orphan(sk); |
525 | lock_sock(sk); |
526 | nr = nr_sk(sk); |
527 | |
528 | switch (nr->state) { |
529 | case NR_STATE_0: |
530 | case NR_STATE_1: |
531 | case NR_STATE_2: |
532 | nr_disconnect(sk, 0); |
533 | nr_destroy_socket(sk); |
534 | break; |
535 | |
536 | case NR_STATE_3: |
537 | nr_clear_queues(sk); |
538 | nr->n2count = 0; |
539 | nr_write_internal(sk, NR_DISCREQ); |
540 | nr_start_t1timer(sk); |
541 | nr_stop_t2timer(sk); |
542 | nr_stop_t4timer(sk); |
543 | nr_stop_idletimer(sk); |
544 | nr->state = NR_STATE_2; |
545 | sk->sk_state = TCP_CLOSE; |
546 | sk->sk_shutdown |= SEND_SHUTDOWN; |
547 | sk->sk_state_change(sk); |
548 | sock_set_flag(sk, SOCK_DESTROY); |
549 | break; |
550 | |
551 | default: |
552 | break; |
553 | } |
554 | |
555 | sock->sk = NULL; |
556 | release_sock(sk); |
557 | sock_put(sk); |
558 | |
559 | return 0; |
560 | } |
561 | |
562 | static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
563 | { |
564 | struct sock *sk = sock->sk; |
565 | struct nr_sock *nr = nr_sk(sk); |
566 | struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr; |
567 | struct net_device *dev; |
568 | ax25_uid_assoc *user; |
569 | ax25_address *source; |
570 | |
571 | lock_sock(sk); |
572 | if (!sock_flag(sk, SOCK_ZAPPED)) { |
573 | release_sock(sk); |
574 | return -EINVAL; |
575 | } |
576 | if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) { |
577 | release_sock(sk); |
578 | return -EINVAL; |
579 | } |
580 | if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) { |
581 | release_sock(sk); |
582 | return -EINVAL; |
583 | } |
584 | if (addr->fsa_ax25.sax25_family != AF_NETROM) { |
585 | release_sock(sk); |
586 | return -EINVAL; |
587 | } |
588 | if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) { |
589 | release_sock(sk); |
590 | return -EADDRNOTAVAIL; |
591 | } |
592 | |
593 | /* |
594 | * Only the super user can set an arbitrary user callsign. |
595 | */ |
596 | if (addr->fsa_ax25.sax25_ndigis == 1) { |
597 | if (!capable(CAP_NET_BIND_SERVICE)) { |
598 | dev_put(dev); |
599 | release_sock(sk); |
600 | return -EPERM; |
601 | } |
602 | nr->user_addr = addr->fsa_digipeater[0]; |
603 | nr->source_addr = addr->fsa_ax25.sax25_call; |
604 | } else { |
605 | source = &addr->fsa_ax25.sax25_call; |
606 | |
607 | user = ax25_findbyuid(current_euid()); |
608 | if (user) { |
609 | nr->user_addr = user->call; |
610 | ax25_uid_put(user); |
611 | } else { |
612 | if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) { |
613 | release_sock(sk); |
614 | dev_put(dev); |
615 | return -EPERM; |
616 | } |
617 | nr->user_addr = *source; |
618 | } |
619 | |
620 | nr->source_addr = *source; |
621 | } |
622 | |
623 | nr->device = dev; |
624 | nr_insert_socket(sk); |
625 | |
626 | sock_reset_flag(sk, SOCK_ZAPPED); |
627 | dev_put(dev); |
628 | release_sock(sk); |
629 | |
630 | return 0; |
631 | } |
632 | |
633 | static int nr_connect(struct socket *sock, struct sockaddr *uaddr, |
634 | int addr_len, int flags) |
635 | { |
636 | struct sock *sk = sock->sk; |
637 | struct nr_sock *nr = nr_sk(sk); |
638 | struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr; |
639 | ax25_address *source = NULL; |
640 | ax25_uid_assoc *user; |
641 | struct net_device *dev; |
642 | int err = 0; |
643 | |
644 | lock_sock(sk); |
645 | if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { |
646 | sock->state = SS_CONNECTED; |
647 | goto out_release; /* Connect completed during a ERESTARTSYS event */ |
648 | } |
649 | |
650 | if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { |
651 | sock->state = SS_UNCONNECTED; |
652 | err = -ECONNREFUSED; |
653 | goto out_release; |
654 | } |
655 | |
656 | if (sk->sk_state == TCP_ESTABLISHED) { |
657 | err = -EISCONN; /* No reconnect on a seqpacket socket */ |
658 | goto out_release; |
659 | } |
660 | |
661 | sk->sk_state = TCP_CLOSE; |
662 | sock->state = SS_UNCONNECTED; |
663 | |
664 | if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) { |
665 | err = -EINVAL; |
666 | goto out_release; |
667 | } |
668 | if (addr->sax25_family != AF_NETROM) { |
669 | err = -EINVAL; |
670 | goto out_release; |
671 | } |
672 | if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ |
673 | sock_reset_flag(sk, SOCK_ZAPPED); |
674 | |
675 | if ((dev = nr_dev_first()) == NULL) { |
676 | err = -ENETUNREACH; |
677 | goto out_release; |
678 | } |
679 | source = (ax25_address *)dev->dev_addr; |
680 | |
681 | user = ax25_findbyuid(current_euid()); |
682 | if (user) { |
683 | nr->user_addr = user->call; |
684 | ax25_uid_put(user); |
685 | } else { |
686 | if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) { |
687 | dev_put(dev); |
688 | err = -EPERM; |
689 | goto out_release; |
690 | } |
691 | nr->user_addr = *source; |
692 | } |
693 | |
694 | nr->source_addr = *source; |
695 | nr->device = dev; |
696 | |
697 | dev_put(dev); |
698 | nr_insert_socket(sk); /* Finish the bind */ |
699 | } |
700 | |
701 | nr->dest_addr = addr->sax25_call; |
702 | |
703 | release_sock(sk); |
704 | circuit = nr_find_next_circuit(); |
705 | lock_sock(sk); |
706 | |
707 | nr->my_index = circuit / 256; |
708 | nr->my_id = circuit % 256; |
709 | |
710 | circuit++; |
711 | |
712 | /* Move to connecting socket, start sending Connect Requests */ |
713 | sock->state = SS_CONNECTING; |
714 | sk->sk_state = TCP_SYN_SENT; |
715 | |
716 | nr_establish_data_link(sk); |
717 | |
718 | nr->state = NR_STATE_1; |
719 | |
720 | nr_start_heartbeat(sk); |
721 | |
722 | /* Now the loop */ |
723 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { |
724 | err = -EINPROGRESS; |
725 | goto out_release; |
726 | } |
727 | |
728 | /* |
729 | * A Connect Ack with Choke or timeout or failed routing will go to |
730 | * closed. |
731 | */ |
732 | if (sk->sk_state == TCP_SYN_SENT) { |
733 | DEFINE_WAIT(wait); |
734 | |
735 | for (;;) { |
736 | prepare_to_wait(sk_sleep(sk), &wait, |
737 | TASK_INTERRUPTIBLE); |
738 | if (sk->sk_state != TCP_SYN_SENT) |
739 | break; |
740 | if (!signal_pending(current)) { |
741 | release_sock(sk); |
742 | schedule(); |
743 | lock_sock(sk); |
744 | continue; |
745 | } |
746 | err = -ERESTARTSYS; |
747 | break; |
748 | } |
749 | finish_wait(sk_sleep(sk), &wait); |
750 | if (err) |
751 | goto out_release; |
752 | } |
753 | |
754 | if (sk->sk_state != TCP_ESTABLISHED) { |
755 | sock->state = SS_UNCONNECTED; |
756 | err = sock_error(sk); /* Always set at this point */ |
757 | goto out_release; |
758 | } |
759 | |
760 | sock->state = SS_CONNECTED; |
761 | |
762 | out_release: |
763 | release_sock(sk); |
764 | |
765 | return err; |
766 | } |
767 | |
768 | static int nr_accept(struct socket *sock, struct socket *newsock, int flags) |
769 | { |
770 | struct sk_buff *skb; |
771 | struct sock *newsk; |
772 | DEFINE_WAIT(wait); |
773 | struct sock *sk; |
774 | int err = 0; |
775 | |
776 | if ((sk = sock->sk) == NULL) |
777 | return -EINVAL; |
778 | |
779 | lock_sock(sk); |
780 | if (sk->sk_type != SOCK_SEQPACKET) { |
781 | err = -EOPNOTSUPP; |
782 | goto out_release; |
783 | } |
784 | |
785 | if (sk->sk_state != TCP_LISTEN) { |
786 | err = -EINVAL; |
787 | goto out_release; |
788 | } |
789 | |
790 | /* |
791 | * The write queue this time is holding sockets ready to use |
792 | * hooked into the SABM we saved |
793 | */ |
794 | for (;;) { |
795 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
796 | skb = skb_dequeue(&sk->sk_receive_queue); |
797 | if (skb) |
798 | break; |
799 | |
800 | if (flags & O_NONBLOCK) { |
801 | err = -EWOULDBLOCK; |
802 | break; |
803 | } |
804 | if (!signal_pending(current)) { |
805 | release_sock(sk); |
806 | schedule(); |
807 | lock_sock(sk); |
808 | continue; |
809 | } |
810 | err = -ERESTARTSYS; |
811 | break; |
812 | } |
813 | finish_wait(sk_sleep(sk), &wait); |
814 | if (err) |
815 | goto out_release; |
816 | |
817 | newsk = skb->sk; |
818 | sock_graft(newsk, newsock); |
819 | |
820 | /* Now attach up the new socket */ |
821 | kfree_skb(skb); |
822 | sk_acceptq_removed(sk); |
823 | |
824 | out_release: |
825 | release_sock(sk); |
826 | |
827 | return err; |
828 | } |
829 | |
830 | static int nr_getname(struct socket *sock, struct sockaddr *uaddr, |
831 | int *uaddr_len, int peer) |
832 | { |
833 | struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr; |
834 | struct sock *sk = sock->sk; |
835 | struct nr_sock *nr = nr_sk(sk); |
836 | |
837 | memset(&sax->fsa_ax25, 0, sizeof(struct sockaddr_ax25)); |
838 | |
839 | lock_sock(sk); |
840 | if (peer != 0) { |
841 | if (sk->sk_state != TCP_ESTABLISHED) { |
842 | release_sock(sk); |
843 | return -ENOTCONN; |
844 | } |
845 | sax->fsa_ax25.sax25_family = AF_NETROM; |
846 | sax->fsa_ax25.sax25_ndigis = 1; |
847 | sax->fsa_ax25.sax25_call = nr->user_addr; |
848 | memset(sax->fsa_digipeater, 0, sizeof(sax->fsa_digipeater)); |
849 | sax->fsa_digipeater[0] = nr->dest_addr; |
850 | *uaddr_len = sizeof(struct full_sockaddr_ax25); |
851 | } else { |
852 | sax->fsa_ax25.sax25_family = AF_NETROM; |
853 | sax->fsa_ax25.sax25_ndigis = 0; |
854 | sax->fsa_ax25.sax25_call = nr->source_addr; |
855 | *uaddr_len = sizeof(struct sockaddr_ax25); |
856 | } |
857 | release_sock(sk); |
858 | |
859 | return 0; |
860 | } |
861 | |
862 | int nr_rx_frame(struct sk_buff *skb, struct net_device *dev) |
863 | { |
864 | struct sock *sk; |
865 | struct sock *make; |
866 | struct nr_sock *nr_make; |
867 | ax25_address *src, *dest, *user; |
868 | unsigned short circuit_index, circuit_id; |
869 | unsigned short peer_circuit_index, peer_circuit_id; |
870 | unsigned short frametype, flags, window, timeout; |
871 | int ret; |
872 | |
873 | skb->sk = NULL; /* Initially we don't know who it's for */ |
874 | |
875 | /* |
876 | * skb->data points to the netrom frame start |
877 | */ |
878 | |
879 | src = (ax25_address *)(skb->data + 0); |
880 | dest = (ax25_address *)(skb->data + 7); |
881 | |
882 | circuit_index = skb->data[15]; |
883 | circuit_id = skb->data[16]; |
884 | peer_circuit_index = skb->data[17]; |
885 | peer_circuit_id = skb->data[18]; |
886 | frametype = skb->data[19] & 0x0F; |
887 | flags = skb->data[19] & 0xF0; |
888 | |
889 | /* |
890 | * Check for an incoming IP over NET/ROM frame. |
891 | */ |
892 | if (frametype == NR_PROTOEXT && |
893 | circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) { |
894 | skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN); |
895 | skb_reset_transport_header(skb); |
896 | |
897 | return nr_rx_ip(skb, dev); |
898 | } |
899 | |
900 | /* |
901 | * Find an existing socket connection, based on circuit ID, if it's |
902 | * a Connect Request base it on their circuit ID. |
903 | * |
904 | * Circuit ID 0/0 is not valid but it could still be a "reset" for a |
905 | * circuit that no longer exists at the other end ... |
906 | */ |
907 | |
908 | sk = NULL; |
909 | |
910 | if (circuit_index == 0 && circuit_id == 0) { |
911 | if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG) |
912 | sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src); |
913 | } else { |
914 | if (frametype == NR_CONNREQ) |
915 | sk = nr_find_peer(circuit_index, circuit_id, src); |
916 | else |
917 | sk = nr_find_socket(circuit_index, circuit_id); |
918 | } |
919 | |
920 | if (sk != NULL) { |
921 | skb_reset_transport_header(skb); |
922 | |
923 | if (frametype == NR_CONNACK && skb->len == 22) |
924 | nr_sk(sk)->bpqext = 1; |
925 | else |
926 | nr_sk(sk)->bpqext = 0; |
927 | |
928 | ret = nr_process_rx_frame(sk, skb); |
929 | bh_unlock_sock(sk); |
930 | return ret; |
931 | } |
932 | |
933 | /* |
934 | * Now it should be a CONNREQ. |
935 | */ |
936 | if (frametype != NR_CONNREQ) { |
937 | /* |
938 | * Here it would be nice to be able to send a reset but |
939 | * NET/ROM doesn't have one. We've tried to extend the protocol |
940 | * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that |
941 | * apparently kills BPQ boxes... :-( |
942 | * So now we try to follow the established behaviour of |
943 | * G8PZT's Xrouter which is sending packets with command type 7 |
944 | * as an extension of the protocol. |
945 | */ |
946 | if (sysctl_netrom_reset_circuit && |
947 | (frametype != NR_RESET || flags != 0)) |
948 | nr_transmit_reset(skb, 1); |
949 | |
950 | return 0; |
951 | } |
952 | |
953 | sk = nr_find_listener(dest); |
954 | |
955 | user = (ax25_address *)(skb->data + 21); |
956 | |
957 | if (sk == NULL || sk_acceptq_is_full(sk) || |
958 | (make = nr_make_new(sk)) == NULL) { |
959 | nr_transmit_refusal(skb, 0); |
960 | if (sk) |
961 | bh_unlock_sock(sk); |
962 | return 0; |
963 | } |
964 | |
965 | window = skb->data[20]; |
966 | |
967 | skb->sk = make; |
968 | make->sk_state = TCP_ESTABLISHED; |
969 | |
970 | /* Fill in his circuit details */ |
971 | nr_make = nr_sk(make); |
972 | nr_make->source_addr = *dest; |
973 | nr_make->dest_addr = *src; |
974 | nr_make->user_addr = *user; |
975 | |
976 | nr_make->your_index = circuit_index; |
977 | nr_make->your_id = circuit_id; |
978 | |
979 | bh_unlock_sock(sk); |
980 | circuit = nr_find_next_circuit(); |
981 | bh_lock_sock(sk); |
982 | |
983 | nr_make->my_index = circuit / 256; |
984 | nr_make->my_id = circuit % 256; |
985 | |
986 | circuit++; |
987 | |
988 | /* Window negotiation */ |
989 | if (window < nr_make->window) |
990 | nr_make->window = window; |
991 | |
992 | /* L4 timeout negotiation */ |
993 | if (skb->len == 37) { |
994 | timeout = skb->data[36] * 256 + skb->data[35]; |
995 | if (timeout * HZ < nr_make->t1) |
996 | nr_make->t1 = timeout * HZ; |
997 | nr_make->bpqext = 1; |
998 | } else { |
999 | nr_make->bpqext = 0; |
1000 | } |
1001 | |
1002 | nr_write_internal(make, NR_CONNACK); |
1003 | |
1004 | nr_make->condition = 0x00; |
1005 | nr_make->vs = 0; |
1006 | nr_make->va = 0; |
1007 | nr_make->vr = 0; |
1008 | nr_make->vl = 0; |
1009 | nr_make->state = NR_STATE_3; |
1010 | sk_acceptq_added(sk); |
1011 | skb_queue_head(&sk->sk_receive_queue, skb); |
1012 | |
1013 | if (!sock_flag(sk, SOCK_DEAD)) |
1014 | sk->sk_data_ready(sk); |
1015 | |
1016 | bh_unlock_sock(sk); |
1017 | |
1018 | nr_insert_socket(make); |
1019 | |
1020 | nr_start_heartbeat(make); |
1021 | nr_start_idletimer(make); |
1022 | |
1023 | return 1; |
1024 | } |
1025 | |
1026 | static int nr_sendmsg(struct kiocb *iocb, struct socket *sock, |
1027 | struct msghdr *msg, size_t len) |
1028 | { |
1029 | struct sock *sk = sock->sk; |
1030 | struct nr_sock *nr = nr_sk(sk); |
1031 | DECLARE_SOCKADDR(struct sockaddr_ax25 *, usax, msg->msg_name); |
1032 | int err; |
1033 | struct sockaddr_ax25 sax; |
1034 | struct sk_buff *skb; |
1035 | unsigned char *asmptr; |
1036 | int size; |
1037 | |
1038 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) |
1039 | return -EINVAL; |
1040 | |
1041 | lock_sock(sk); |
1042 | if (sock_flag(sk, SOCK_ZAPPED)) { |
1043 | err = -EADDRNOTAVAIL; |
1044 | goto out; |
1045 | } |
1046 | |
1047 | if (sk->sk_shutdown & SEND_SHUTDOWN) { |
1048 | send_sig(SIGPIPE, current, 0); |
1049 | err = -EPIPE; |
1050 | goto out; |
1051 | } |
1052 | |
1053 | if (nr->device == NULL) { |
1054 | err = -ENETUNREACH; |
1055 | goto out; |
1056 | } |
1057 | |
1058 | if (usax) { |
1059 | if (msg->msg_namelen < sizeof(sax)) { |
1060 | err = -EINVAL; |
1061 | goto out; |
1062 | } |
1063 | sax = *usax; |
1064 | if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) { |
1065 | err = -EISCONN; |
1066 | goto out; |
1067 | } |
1068 | if (sax.sax25_family != AF_NETROM) { |
1069 | err = -EINVAL; |
1070 | goto out; |
1071 | } |
1072 | } else { |
1073 | if (sk->sk_state != TCP_ESTABLISHED) { |
1074 | err = -ENOTCONN; |
1075 | goto out; |
1076 | } |
1077 | sax.sax25_family = AF_NETROM; |
1078 | sax.sax25_call = nr->dest_addr; |
1079 | } |
1080 | |
1081 | /* Build a packet - the conventional user limit is 236 bytes. We can |
1082 | do ludicrously large NetROM frames but must not overflow */ |
1083 | if (len > 65536) { |
1084 | err = -EMSGSIZE; |
1085 | goto out; |
1086 | } |
1087 | |
1088 | size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN; |
1089 | |
1090 | if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) |
1091 | goto out; |
1092 | |
1093 | skb_reserve(skb, size - len); |
1094 | skb_reset_transport_header(skb); |
1095 | |
1096 | /* |
1097 | * Push down the NET/ROM header |
1098 | */ |
1099 | |
1100 | asmptr = skb_push(skb, NR_TRANSPORT_LEN); |
1101 | |
1102 | /* Build a NET/ROM Transport header */ |
1103 | |
1104 | *asmptr++ = nr->your_index; |
1105 | *asmptr++ = nr->your_id; |
1106 | *asmptr++ = 0; /* To be filled in later */ |
1107 | *asmptr++ = 0; /* Ditto */ |
1108 | *asmptr++ = NR_INFO; |
1109 | |
1110 | /* |
1111 | * Put the data on the end |
1112 | */ |
1113 | skb_put(skb, len); |
1114 | |
1115 | /* User data follows immediately after the NET/ROM transport header */ |
1116 | if (memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len)) { |
1117 | kfree_skb(skb); |
1118 | err = -EFAULT; |
1119 | goto out; |
1120 | } |
1121 | |
1122 | if (sk->sk_state != TCP_ESTABLISHED) { |
1123 | kfree_skb(skb); |
1124 | err = -ENOTCONN; |
1125 | goto out; |
1126 | } |
1127 | |
1128 | nr_output(sk, skb); /* Shove it onto the queue */ |
1129 | |
1130 | err = len; |
1131 | out: |
1132 | release_sock(sk); |
1133 | return err; |
1134 | } |
1135 | |
1136 | static int nr_recvmsg(struct kiocb *iocb, struct socket *sock, |
1137 | struct msghdr *msg, size_t size, int flags) |
1138 | { |
1139 | struct sock *sk = sock->sk; |
1140 | DECLARE_SOCKADDR(struct sockaddr_ax25 *, sax, msg->msg_name); |
1141 | size_t copied; |
1142 | struct sk_buff *skb; |
1143 | int er; |
1144 | |
1145 | /* |
1146 | * This works for seqpacket too. The receiver has ordered the queue for |
1147 | * us! We do one quick check first though |
1148 | */ |
1149 | |
1150 | lock_sock(sk); |
1151 | if (sk->sk_state != TCP_ESTABLISHED) { |
1152 | release_sock(sk); |
1153 | return -ENOTCONN; |
1154 | } |
1155 | |
1156 | /* Now we can treat all alike */ |
1157 | if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) { |
1158 | release_sock(sk); |
1159 | return er; |
1160 | } |
1161 | |
1162 | skb_reset_transport_header(skb); |
1163 | copied = skb->len; |
1164 | |
1165 | if (copied > size) { |
1166 | copied = size; |
1167 | msg->msg_flags |= MSG_TRUNC; |
1168 | } |
1169 | |
1170 | er = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
1171 | if (er < 0) { |
1172 | skb_free_datagram(sk, skb); |
1173 | release_sock(sk); |
1174 | return er; |
1175 | } |
1176 | |
1177 | if (sax != NULL) { |
1178 | memset(sax, 0, sizeof(*sax)); |
1179 | sax->sax25_family = AF_NETROM; |
1180 | skb_copy_from_linear_data_offset(skb, 7, sax->sax25_call.ax25_call, |
1181 | AX25_ADDR_LEN); |
1182 | msg->msg_namelen = sizeof(*sax); |
1183 | } |
1184 | |
1185 | skb_free_datagram(sk, skb); |
1186 | |
1187 | release_sock(sk); |
1188 | return copied; |
1189 | } |
1190 | |
1191 | |
1192 | static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
1193 | { |
1194 | struct sock *sk = sock->sk; |
1195 | void __user *argp = (void __user *)arg; |
1196 | int ret; |
1197 | |
1198 | switch (cmd) { |
1199 | case TIOCOUTQ: { |
1200 | long amount; |
1201 | |
1202 | lock_sock(sk); |
1203 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
1204 | if (amount < 0) |
1205 | amount = 0; |
1206 | release_sock(sk); |
1207 | return put_user(amount, (int __user *)argp); |
1208 | } |
1209 | |
1210 | case TIOCINQ: { |
1211 | struct sk_buff *skb; |
1212 | long amount = 0L; |
1213 | |
1214 | lock_sock(sk); |
1215 | /* These two are safe on a single CPU system as only user tasks fiddle here */ |
1216 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) |
1217 | amount = skb->len; |
1218 | release_sock(sk); |
1219 | return put_user(amount, (int __user *)argp); |
1220 | } |
1221 | |
1222 | case SIOCGSTAMP: |
1223 | lock_sock(sk); |
1224 | ret = sock_get_timestamp(sk, argp); |
1225 | release_sock(sk); |
1226 | return ret; |
1227 | |
1228 | case SIOCGSTAMPNS: |
1229 | lock_sock(sk); |
1230 | ret = sock_get_timestampns(sk, argp); |
1231 | release_sock(sk); |
1232 | return ret; |
1233 | |
1234 | case SIOCGIFADDR: |
1235 | case SIOCSIFADDR: |
1236 | case SIOCGIFDSTADDR: |
1237 | case SIOCSIFDSTADDR: |
1238 | case SIOCGIFBRDADDR: |
1239 | case SIOCSIFBRDADDR: |
1240 | case SIOCGIFNETMASK: |
1241 | case SIOCSIFNETMASK: |
1242 | case SIOCGIFMETRIC: |
1243 | case SIOCSIFMETRIC: |
1244 | return -EINVAL; |
1245 | |
1246 | case SIOCADDRT: |
1247 | case SIOCDELRT: |
1248 | case SIOCNRDECOBS: |
1249 | if (!capable(CAP_NET_ADMIN)) |
1250 | return -EPERM; |
1251 | return nr_rt_ioctl(cmd, argp); |
1252 | |
1253 | default: |
1254 | return -ENOIOCTLCMD; |
1255 | } |
1256 | |
1257 | return 0; |
1258 | } |
1259 | |
1260 | #ifdef CONFIG_PROC_FS |
1261 | |
1262 | static void *nr_info_start(struct seq_file *seq, loff_t *pos) |
1263 | { |
1264 | spin_lock_bh(&nr_list_lock); |
1265 | return seq_hlist_start_head(&nr_list, *pos); |
1266 | } |
1267 | |
1268 | static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos) |
1269 | { |
1270 | return seq_hlist_next(v, &nr_list, pos); |
1271 | } |
1272 | |
1273 | static void nr_info_stop(struct seq_file *seq, void *v) |
1274 | { |
1275 | spin_unlock_bh(&nr_list_lock); |
1276 | } |
1277 | |
1278 | static int nr_info_show(struct seq_file *seq, void *v) |
1279 | { |
1280 | struct sock *s = sk_entry(v); |
1281 | struct net_device *dev; |
1282 | struct nr_sock *nr; |
1283 | const char *devname; |
1284 | char buf[11]; |
1285 | |
1286 | if (v == SEQ_START_TOKEN) |
1287 | seq_puts(seq, |
1288 | "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"); |
1289 | |
1290 | else { |
1291 | |
1292 | bh_lock_sock(s); |
1293 | nr = nr_sk(s); |
1294 | |
1295 | if ((dev = nr->device) == NULL) |
1296 | devname = "???"; |
1297 | else |
1298 | devname = dev->name; |
1299 | |
1300 | seq_printf(seq, "%-9s ", ax2asc(buf, &nr->user_addr)); |
1301 | seq_printf(seq, "%-9s ", ax2asc(buf, &nr->dest_addr)); |
1302 | seq_printf(seq, |
1303 | "%-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", |
1304 | ax2asc(buf, &nr->source_addr), |
1305 | devname, |
1306 | nr->my_index, |
1307 | nr->my_id, |
1308 | nr->your_index, |
1309 | nr->your_id, |
1310 | nr->state, |
1311 | nr->vs, |
1312 | nr->vr, |
1313 | nr->va, |
1314 | ax25_display_timer(&nr->t1timer) / HZ, |
1315 | nr->t1 / HZ, |
1316 | ax25_display_timer(&nr->t2timer) / HZ, |
1317 | nr->t2 / HZ, |
1318 | ax25_display_timer(&nr->t4timer) / HZ, |
1319 | nr->t4 / HZ, |
1320 | ax25_display_timer(&nr->idletimer) / (60 * HZ), |
1321 | nr->idle / (60 * HZ), |
1322 | nr->n2count, |
1323 | nr->n2, |
1324 | nr->window, |
1325 | sk_wmem_alloc_get(s), |
1326 | sk_rmem_alloc_get(s), |
1327 | s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); |
1328 | |
1329 | bh_unlock_sock(s); |
1330 | } |
1331 | return 0; |
1332 | } |
1333 | |
1334 | static const struct seq_operations nr_info_seqops = { |
1335 | .start = nr_info_start, |
1336 | .next = nr_info_next, |
1337 | .stop = nr_info_stop, |
1338 | .show = nr_info_show, |
1339 | }; |
1340 | |
1341 | static int nr_info_open(struct inode *inode, struct file *file) |
1342 | { |
1343 | return seq_open(file, &nr_info_seqops); |
1344 | } |
1345 | |
1346 | static const struct file_operations nr_info_fops = { |
1347 | .owner = THIS_MODULE, |
1348 | .open = nr_info_open, |
1349 | .read = seq_read, |
1350 | .llseek = seq_lseek, |
1351 | .release = seq_release, |
1352 | }; |
1353 | #endif /* CONFIG_PROC_FS */ |
1354 | |
1355 | static const struct net_proto_family nr_family_ops = { |
1356 | .family = PF_NETROM, |
1357 | .create = nr_create, |
1358 | .owner = THIS_MODULE, |
1359 | }; |
1360 | |
1361 | static const struct proto_ops nr_proto_ops = { |
1362 | .family = PF_NETROM, |
1363 | .owner = THIS_MODULE, |
1364 | .release = nr_release, |
1365 | .bind = nr_bind, |
1366 | .connect = nr_connect, |
1367 | .socketpair = sock_no_socketpair, |
1368 | .accept = nr_accept, |
1369 | .getname = nr_getname, |
1370 | .poll = datagram_poll, |
1371 | .ioctl = nr_ioctl, |
1372 | .listen = nr_listen, |
1373 | .shutdown = sock_no_shutdown, |
1374 | .setsockopt = nr_setsockopt, |
1375 | .getsockopt = nr_getsockopt, |
1376 | .sendmsg = nr_sendmsg, |
1377 | .recvmsg = nr_recvmsg, |
1378 | .mmap = sock_no_mmap, |
1379 | .sendpage = sock_no_sendpage, |
1380 | }; |
1381 | |
1382 | static struct notifier_block nr_dev_notifier = { |
1383 | .notifier_call = nr_device_event, |
1384 | }; |
1385 | |
1386 | static struct net_device **dev_nr; |
1387 | |
1388 | static struct ax25_protocol nr_pid = { |
1389 | .pid = AX25_P_NETROM, |
1390 | .func = nr_route_frame |
1391 | }; |
1392 | |
1393 | static struct ax25_linkfail nr_linkfail_notifier = { |
1394 | .func = nr_link_failed, |
1395 | }; |
1396 | |
1397 | static int __init nr_proto_init(void) |
1398 | { |
1399 | int i; |
1400 | int rc = proto_register(&nr_proto, 0); |
1401 | |
1402 | if (rc != 0) |
1403 | goto out; |
1404 | |
1405 | if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) { |
1406 | printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n"); |
1407 | return -1; |
1408 | } |
1409 | |
1410 | dev_nr = kzalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL); |
1411 | if (dev_nr == NULL) { |
1412 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n"); |
1413 | return -1; |
1414 | } |
1415 | |
1416 | for (i = 0; i < nr_ndevs; i++) { |
1417 | char name[IFNAMSIZ]; |
1418 | struct net_device *dev; |
1419 | |
1420 | sprintf(name, "nr%d", i); |
1421 | dev = alloc_netdev(0, name, nr_setup); |
1422 | if (!dev) { |
1423 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n"); |
1424 | goto fail; |
1425 | } |
1426 | |
1427 | dev->base_addr = i; |
1428 | if (register_netdev(dev)) { |
1429 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n"); |
1430 | free_netdev(dev); |
1431 | goto fail; |
1432 | } |
1433 | nr_set_lockdep_key(dev); |
1434 | dev_nr[i] = dev; |
1435 | } |
1436 | |
1437 | if (sock_register(&nr_family_ops)) { |
1438 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n"); |
1439 | goto fail; |
1440 | } |
1441 | |
1442 | register_netdevice_notifier(&nr_dev_notifier); |
1443 | |
1444 | ax25_register_pid(&nr_pid); |
1445 | ax25_linkfail_register(&nr_linkfail_notifier); |
1446 | |
1447 | #ifdef CONFIG_SYSCTL |
1448 | nr_register_sysctl(); |
1449 | #endif |
1450 | |
1451 | nr_loopback_init(); |
1452 | |
1453 | proc_create("nr", S_IRUGO, init_net.proc_net, &nr_info_fops); |
1454 | proc_create("nr_neigh", S_IRUGO, init_net.proc_net, &nr_neigh_fops); |
1455 | proc_create("nr_nodes", S_IRUGO, init_net.proc_net, &nr_nodes_fops); |
1456 | out: |
1457 | return rc; |
1458 | fail: |
1459 | while (--i >= 0) { |
1460 | unregister_netdev(dev_nr[i]); |
1461 | free_netdev(dev_nr[i]); |
1462 | } |
1463 | kfree(dev_nr); |
1464 | proto_unregister(&nr_proto); |
1465 | rc = -1; |
1466 | goto out; |
1467 | } |
1468 | |
1469 | module_init(nr_proto_init); |
1470 | |
1471 | module_param(nr_ndevs, int, 0); |
1472 | MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices"); |
1473 | |
1474 | MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); |
1475 | MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol"); |
1476 | MODULE_LICENSE("GPL"); |
1477 | MODULE_ALIAS_NETPROTO(PF_NETROM); |
1478 | |
1479 | static void __exit nr_exit(void) |
1480 | { |
1481 | int i; |
1482 | |
1483 | remove_proc_entry("nr", init_net.proc_net); |
1484 | remove_proc_entry("nr_neigh", init_net.proc_net); |
1485 | remove_proc_entry("nr_nodes", init_net.proc_net); |
1486 | nr_loopback_clear(); |
1487 | |
1488 | nr_rt_free(); |
1489 | |
1490 | #ifdef CONFIG_SYSCTL |
1491 | nr_unregister_sysctl(); |
1492 | #endif |
1493 | |
1494 | ax25_linkfail_release(&nr_linkfail_notifier); |
1495 | ax25_protocol_release(AX25_P_NETROM); |
1496 | |
1497 | unregister_netdevice_notifier(&nr_dev_notifier); |
1498 | |
1499 | sock_unregister(PF_NETROM); |
1500 | |
1501 | for (i = 0; i < nr_ndevs; i++) { |
1502 | struct net_device *dev = dev_nr[i]; |
1503 | if (dev) { |
1504 | unregister_netdev(dev); |
1505 | free_netdev(dev); |
1506 | } |
1507 | } |
1508 | |
1509 | kfree(dev_nr); |
1510 | proto_unregister(&nr_proto); |
1511 | } |
1512 | module_exit(nr_exit); |
1513 |
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Tags:
od-2011-09-04
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v2.6.34-rc5
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v3.9