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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> | |
42 | #include <net/tcp.h> | |
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; | |
462 | ||
463 | if (sock_flag(osk, SOCK_ZAPPED)) | |
464 | sock_set_flag(sk, SOCK_ZAPPED); | |
465 | ||
466 | if (sock_flag(osk, SOCK_DBG)) | |
467 | sock_set_flag(sk, SOCK_DBG); | |
468 | ||
469 | skb_queue_head_init(&nr->ack_queue); | |
470 | skb_queue_head_init(&nr->reseq_queue); | |
471 | skb_queue_head_init(&nr->frag_queue); | |
472 | ||
473 | nr_init_timers(sk); | |
474 | ||
475 | onr = nr_sk(osk); | |
476 | ||
477 | nr->t1 = onr->t1; | |
478 | nr->t2 = onr->t2; | |
479 | nr->n2 = onr->n2; | |
480 | nr->t4 = onr->t4; | |
481 | nr->idle = onr->idle; | |
482 | nr->window = onr->window; | |
483 | ||
484 | nr->device = onr->device; | |
485 | nr->bpqext = onr->bpqext; | |
486 | ||
487 | return sk; | |
488 | } | |
489 | ||
490 | static int nr_release(struct socket *sock) | |
491 | { | |
492 | struct sock *sk = sock->sk; | |
493 | struct nr_sock *nr; | |
494 | ||
495 | if (sk == NULL) return 0; | |
496 | ||
497 | sock_hold(sk); | |
498 | lock_sock(sk); | |
499 | nr = nr_sk(sk); | |
500 | ||
501 | switch (nr->state) { | |
502 | case NR_STATE_0: | |
503 | case NR_STATE_1: | |
504 | case NR_STATE_2: | |
505 | nr_disconnect(sk, 0); | |
506 | nr_destroy_socket(sk); | |
507 | break; | |
508 | ||
509 | case NR_STATE_3: | |
510 | nr_clear_queues(sk); | |
511 | nr->n2count = 0; | |
512 | nr_write_internal(sk, NR_DISCREQ); | |
513 | nr_start_t1timer(sk); | |
514 | nr_stop_t2timer(sk); | |
515 | nr_stop_t4timer(sk); | |
516 | nr_stop_idletimer(sk); | |
517 | nr->state = NR_STATE_2; | |
518 | sk->sk_state = TCP_CLOSE; | |
519 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
520 | sk->sk_state_change(sk); | |
521 | sock_orphan(sk); | |
522 | sock_set_flag(sk, SOCK_DESTROY); | |
523 | sk->sk_socket = NULL; | |
524 | break; | |
525 | ||
526 | default: | |
527 | sk->sk_socket = NULL; | |
528 | break; | |
529 | } | |
530 | ||
531 | sock->sk = NULL; | |
532 | release_sock(sk); | |
533 | sock_put(sk); | |
534 | ||
535 | return 0; | |
536 | } | |
537 | ||
538 | static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
539 | { | |
540 | struct sock *sk = sock->sk; | |
541 | struct nr_sock *nr = nr_sk(sk); | |
542 | struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr; | |
543 | struct net_device *dev; | |
544 | ax25_address *user, *source; | |
545 | ||
546 | lock_sock(sk); | |
547 | if (!sock_flag(sk, SOCK_ZAPPED)) { | |
548 | release_sock(sk); | |
549 | return -EINVAL; | |
550 | } | |
551 | if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) { | |
552 | release_sock(sk); | |
553 | return -EINVAL; | |
554 | } | |
555 | if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) { | |
556 | release_sock(sk); | |
557 | return -EINVAL; | |
558 | } | |
559 | if (addr->fsa_ax25.sax25_family != AF_NETROM) { | |
560 | release_sock(sk); | |
561 | return -EINVAL; | |
562 | } | |
563 | if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) { | |
564 | SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n"); | |
565 | release_sock(sk); | |
566 | return -EADDRNOTAVAIL; | |
567 | } | |
568 | ||
569 | /* | |
570 | * Only the super user can set an arbitrary user callsign. | |
571 | */ | |
572 | if (addr->fsa_ax25.sax25_ndigis == 1) { | |
573 | if (!capable(CAP_NET_BIND_SERVICE)) { | |
574 | dev_put(dev); | |
575 | release_sock(sk); | |
576 | return -EACCES; | |
577 | } | |
578 | nr->user_addr = addr->fsa_digipeater[0]; | |
579 | nr->source_addr = addr->fsa_ax25.sax25_call; | |
580 | } else { | |
581 | source = &addr->fsa_ax25.sax25_call; | |
582 | ||
583 | if ((user = ax25_findbyuid(current->euid)) == NULL) { | |
584 | if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) { | |
585 | release_sock(sk); | |
586 | dev_put(dev); | |
587 | return -EPERM; | |
588 | } | |
589 | user = source; | |
590 | } | |
591 | ||
592 | nr->user_addr = *user; | |
593 | nr->source_addr = *source; | |
594 | } | |
595 | ||
596 | nr->device = dev; | |
597 | nr_insert_socket(sk); | |
598 | ||
599 | sock_reset_flag(sk, SOCK_ZAPPED); | |
600 | dev_put(dev); | |
601 | release_sock(sk); | |
602 | SOCK_DEBUG(sk, "NET/ROM: socket is bound\n"); | |
603 | return 0; | |
604 | } | |
605 | ||
606 | static int nr_connect(struct socket *sock, struct sockaddr *uaddr, | |
607 | int addr_len, int flags) | |
608 | { | |
609 | struct sock *sk = sock->sk; | |
610 | struct nr_sock *nr = nr_sk(sk); | |
611 | struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr; | |
612 | ax25_address *user, *source = NULL; | |
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 | ||
653 | if ((user = ax25_findbyuid(current->euid)) == NULL) { | |
654 | if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) { | |
655 | dev_put(dev); | |
656 | release_sock(sk); | |
657 | return -EPERM; | |
658 | } | |
659 | user = source; | |
660 | } | |
661 | ||
662 | nr->user_addr = *user; | |
663 | nr->source_addr = *source; | |
664 | nr->device = dev; | |
665 | ||
666 | dev_put(dev); | |
667 | nr_insert_socket(sk); /* Finish the bind */ | |
668 | } | |
669 | ||
670 | nr->dest_addr = addr->sax25_call; | |
671 | ||
672 | release_sock(sk); | |
673 | circuit = nr_find_next_circuit(); | |
674 | lock_sock(sk); | |
675 | ||
676 | nr->my_index = circuit / 256; | |
677 | nr->my_id = circuit % 256; | |
678 | ||
679 | circuit++; | |
680 | ||
681 | /* Move to connecting socket, start sending Connect Requests */ | |
682 | sock->state = SS_CONNECTING; | |
683 | sk->sk_state = TCP_SYN_SENT; | |
684 | ||
685 | nr_establish_data_link(sk); | |
686 | ||
687 | nr->state = NR_STATE_1; | |
688 | ||
689 | nr_start_heartbeat(sk); | |
690 | ||
691 | /* Now the loop */ | |
692 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { | |
693 | release_sock(sk); | |
694 | return -EINPROGRESS; | |
695 | } | |
696 | ||
697 | /* | |
698 | * A Connect Ack with Choke or timeout or failed routing will go to | |
699 | * closed. | |
700 | */ | |
701 | if (sk->sk_state == TCP_SYN_SENT) { | |
702 | struct task_struct *tsk = current; | |
703 | DECLARE_WAITQUEUE(wait, tsk); | |
704 | ||
705 | add_wait_queue(sk->sk_sleep, &wait); | |
706 | for (;;) { | |
707 | set_current_state(TASK_INTERRUPTIBLE); | |
708 | if (sk->sk_state != TCP_SYN_SENT) | |
709 | break; | |
710 | release_sock(sk); | |
711 | if (!signal_pending(tsk)) { | |
712 | schedule(); | |
713 | lock_sock(sk); | |
714 | continue; | |
715 | } | |
716 | current->state = TASK_RUNNING; | |
717 | remove_wait_queue(sk->sk_sleep, &wait); | |
718 | return -ERESTARTSYS; | |
719 | } | |
720 | current->state = TASK_RUNNING; | |
721 | remove_wait_queue(sk->sk_sleep, &wait); | |
722 | } | |
723 | ||
724 | if (sk->sk_state != TCP_ESTABLISHED) { | |
725 | sock->state = SS_UNCONNECTED; | |
726 | release_sock(sk); | |
727 | return sock_error(sk); /* Always set at this point */ | |
728 | } | |
729 | ||
730 | sock->state = SS_CONNECTED; | |
731 | release_sock(sk); | |
732 | ||
733 | return 0; | |
734 | } | |
735 | ||
736 | static int nr_accept(struct socket *sock, struct socket *newsock, int flags) | |
737 | { | |
738 | struct task_struct *tsk = current; | |
739 | DECLARE_WAITQUEUE(wait, tsk); | |
740 | struct sk_buff *skb; | |
741 | struct sock *newsk; | |
742 | struct sock *sk; | |
743 | int err = 0; | |
744 | ||
745 | if ((sk = sock->sk) == NULL) | |
746 | return -EINVAL; | |
747 | ||
748 | lock_sock(sk); | |
749 | if (sk->sk_type != SOCK_SEQPACKET) { | |
750 | err = -EOPNOTSUPP; | |
751 | goto out; | |
752 | } | |
753 | ||
754 | if (sk->sk_state != TCP_LISTEN) { | |
755 | err = -EINVAL; | |
756 | goto out; | |
757 | } | |
758 | ||
759 | /* | |
760 | * The write queue this time is holding sockets ready to use | |
761 | * hooked into the SABM we saved | |
762 | */ | |
763 | add_wait_queue(sk->sk_sleep, &wait); | |
764 | for (;;) { | |
765 | skb = skb_dequeue(&sk->sk_receive_queue); | |
766 | if (skb) | |
767 | break; | |
768 | ||
769 | current->state = TASK_INTERRUPTIBLE; | |
770 | release_sock(sk); | |
771 | if (flags & O_NONBLOCK) { | |
772 | current->state = TASK_RUNNING; | |
773 | remove_wait_queue(sk->sk_sleep, &wait); | |
774 | return -EWOULDBLOCK; | |
775 | } | |
776 | if (!signal_pending(tsk)) { | |
777 | schedule(); | |
778 | lock_sock(sk); | |
779 | continue; | |
780 | } | |
781 | current->state = TASK_RUNNING; | |
782 | remove_wait_queue(sk->sk_sleep, &wait); | |
783 | return -ERESTARTSYS; | |
784 | } | |
785 | current->state = TASK_RUNNING; | |
786 | remove_wait_queue(sk->sk_sleep, &wait); | |
787 | ||
788 | newsk = skb->sk; | |
789 | newsk->sk_socket = newsock; | |
790 | newsk->sk_sleep = &newsock->wait; | |
791 | ||
792 | /* Now attach up the new socket */ | |
793 | kfree_skb(skb); | |
794 | sk->sk_ack_backlog--; | |
795 | newsock->sk = newsk; | |
796 | ||
797 | out: | |
798 | release_sock(sk); | |
799 | return err; | |
800 | } | |
801 | ||
802 | static int nr_getname(struct socket *sock, struct sockaddr *uaddr, | |
803 | int *uaddr_len, int peer) | |
804 | { | |
805 | struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr; | |
806 | struct sock *sk = sock->sk; | |
807 | struct nr_sock *nr = nr_sk(sk); | |
808 | ||
809 | lock_sock(sk); | |
810 | if (peer != 0) { | |
811 | if (sk->sk_state != TCP_ESTABLISHED) { | |
812 | release_sock(sk); | |
813 | return -ENOTCONN; | |
814 | } | |
815 | sax->fsa_ax25.sax25_family = AF_NETROM; | |
816 | sax->fsa_ax25.sax25_ndigis = 1; | |
817 | sax->fsa_ax25.sax25_call = nr->user_addr; | |
818 | sax->fsa_digipeater[0] = nr->dest_addr; | |
819 | *uaddr_len = sizeof(struct full_sockaddr_ax25); | |
820 | } else { | |
821 | sax->fsa_ax25.sax25_family = AF_NETROM; | |
822 | sax->fsa_ax25.sax25_ndigis = 0; | |
823 | sax->fsa_ax25.sax25_call = nr->source_addr; | |
824 | *uaddr_len = sizeof(struct sockaddr_ax25); | |
825 | } | |
826 | release_sock(sk); | |
827 | ||
828 | return 0; | |
829 | } | |
830 | ||
831 | int nr_rx_frame(struct sk_buff *skb, struct net_device *dev) | |
832 | { | |
833 | struct sock *sk; | |
834 | struct sock *make; | |
835 | struct nr_sock *nr_make; | |
836 | ax25_address *src, *dest, *user; | |
837 | unsigned short circuit_index, circuit_id; | |
838 | unsigned short peer_circuit_index, peer_circuit_id; | |
839 | unsigned short frametype, flags, window, timeout; | |
840 | int ret; | |
841 | ||
842 | skb->sk = NULL; /* Initially we don't know who it's for */ | |
843 | ||
844 | /* | |
845 | * skb->data points to the netrom frame start | |
846 | */ | |
847 | ||
848 | src = (ax25_address *)(skb->data + 0); | |
849 | dest = (ax25_address *)(skb->data + 7); | |
850 | ||
851 | circuit_index = skb->data[15]; | |
852 | circuit_id = skb->data[16]; | |
853 | peer_circuit_index = skb->data[17]; | |
854 | peer_circuit_id = skb->data[18]; | |
855 | frametype = skb->data[19] & 0x0F; | |
856 | flags = skb->data[19] & 0xF0; | |
857 | ||
858 | #ifdef CONFIG_INET | |
859 | /* | |
860 | * Check for an incoming IP over NET/ROM frame. | |
861 | */ | |
862 | if (frametype == NR_PROTOEXT && circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) { | |
863 | skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN); | |
864 | skb->h.raw = skb->data; | |
865 | ||
866 | return nr_rx_ip(skb, dev); | |
867 | } | |
868 | #endif | |
869 | ||
870 | /* | |
871 | * Find an existing socket connection, based on circuit ID, if it's | |
872 | * a Connect Request base it on their circuit ID. | |
873 | * | |
874 | * Circuit ID 0/0 is not valid but it could still be a "reset" for a | |
875 | * circuit that no longer exists at the other end ... | |
876 | */ | |
877 | ||
878 | sk = NULL; | |
879 | ||
880 | if (circuit_index == 0 && circuit_id == 0) { | |
881 | if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG) | |
882 | sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src); | |
883 | } else { | |
884 | if (frametype == NR_CONNREQ) | |
885 | sk = nr_find_peer(circuit_index, circuit_id, src); | |
886 | else | |
887 | sk = nr_find_socket(circuit_index, circuit_id); | |
888 | } | |
889 | ||
890 | if (sk != NULL) { | |
891 | skb->h.raw = skb->data; | |
892 | ||
893 | if (frametype == NR_CONNACK && skb->len == 22) | |
894 | nr_sk(sk)->bpqext = 1; | |
895 | else | |
896 | nr_sk(sk)->bpqext = 0; | |
897 | ||
898 | ret = nr_process_rx_frame(sk, skb); | |
899 | bh_unlock_sock(sk); | |
900 | return ret; | |
901 | } | |
902 | ||
903 | /* | |
904 | * Now it should be a CONNREQ. | |
905 | */ | |
906 | if (frametype != NR_CONNREQ) { | |
907 | /* | |
908 | * Here it would be nice to be able to send a reset but | |
909 | * NET/ROM doesn't have one. The following hack would | |
910 | * have been a way to extend the protocol but apparently | |
911 | * it kills BPQ boxes... :-( | |
912 | */ | |
913 | #if 0 | |
914 | /* | |
915 | * Never reply to a CONNACK/CHOKE. | |
916 | */ | |
917 | if (frametype != NR_CONNACK || flags != NR_CHOKE_FLAG) | |
918 | nr_transmit_refusal(skb, 1); | |
919 | #endif | |
920 | return 0; | |
921 | } | |
922 | ||
923 | sk = nr_find_listener(dest); | |
924 | ||
925 | user = (ax25_address *)(skb->data + 21); | |
926 | ||
927 | if (sk == NULL || sk_acceptq_is_full(sk) || | |
928 | (make = nr_make_new(sk)) == NULL) { | |
929 | nr_transmit_refusal(skb, 0); | |
930 | if (sk) | |
931 | bh_unlock_sock(sk); | |
932 | return 0; | |
933 | } | |
934 | ||
935 | window = skb->data[20]; | |
936 | ||
937 | skb->sk = make; | |
938 | make->sk_state = TCP_ESTABLISHED; | |
939 | ||
940 | /* Fill in his circuit details */ | |
941 | nr_make = nr_sk(make); | |
942 | nr_make->source_addr = *dest; | |
943 | nr_make->dest_addr = *src; | |
944 | nr_make->user_addr = *user; | |
945 | ||
946 | nr_make->your_index = circuit_index; | |
947 | nr_make->your_id = circuit_id; | |
948 | ||
949 | bh_unlock_sock(sk); | |
950 | circuit = nr_find_next_circuit(); | |
951 | bh_lock_sock(sk); | |
952 | ||
953 | nr_make->my_index = circuit / 256; | |
954 | nr_make->my_id = circuit % 256; | |
955 | ||
956 | circuit++; | |
957 | ||
958 | /* Window negotiation */ | |
959 | if (window < nr_make->window) | |
960 | nr_make->window = window; | |
961 | ||
962 | /* L4 timeout negotiation */ | |
963 | if (skb->len == 37) { | |
964 | timeout = skb->data[36] * 256 + skb->data[35]; | |
965 | if (timeout * HZ < nr_make->t1) | |
966 | nr_make->t1 = timeout * HZ; | |
967 | nr_make->bpqext = 1; | |
968 | } else { | |
969 | nr_make->bpqext = 0; | |
970 | } | |
971 | ||
972 | nr_write_internal(make, NR_CONNACK); | |
973 | ||
974 | nr_make->condition = 0x00; | |
975 | nr_make->vs = 0; | |
976 | nr_make->va = 0; | |
977 | nr_make->vr = 0; | |
978 | nr_make->vl = 0; | |
979 | nr_make->state = NR_STATE_3; | |
980 | sk->sk_ack_backlog++; | |
981 | ||
982 | nr_insert_socket(make); | |
983 | ||
984 | skb_queue_head(&sk->sk_receive_queue, skb); | |
985 | ||
986 | nr_start_heartbeat(make); | |
987 | nr_start_idletimer(make); | |
988 | ||
989 | if (!sock_flag(sk, SOCK_DEAD)) | |
990 | sk->sk_data_ready(sk, skb->len); | |
991 | ||
992 | bh_unlock_sock(sk); | |
993 | return 1; | |
994 | } | |
995 | ||
996 | static int nr_sendmsg(struct kiocb *iocb, struct socket *sock, | |
997 | struct msghdr *msg, size_t len) | |
998 | { | |
999 | struct sock *sk = sock->sk; | |
1000 | struct nr_sock *nr = nr_sk(sk); | |
1001 | struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name; | |
1002 | int err; | |
1003 | struct sockaddr_ax25 sax; | |
1004 | struct sk_buff *skb; | |
1005 | unsigned char *asmptr; | |
1006 | int size; | |
1007 | ||
1008 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) | |
1009 | return -EINVAL; | |
1010 | ||
1011 | lock_sock(sk); | |
1012 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
1013 | err = -EADDRNOTAVAIL; | |
1014 | goto out; | |
1015 | } | |
1016 | ||
1017 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1018 | send_sig(SIGPIPE, current, 0); | |
1019 | err = -EPIPE; | |
1020 | goto out; | |
1021 | } | |
1022 | ||
1023 | if (nr->device == NULL) { | |
1024 | err = -ENETUNREACH; | |
1025 | goto out; | |
1026 | } | |
1027 | ||
1028 | if (usax) { | |
1029 | if (msg->msg_namelen < sizeof(sax)) { | |
1030 | err = -EINVAL; | |
1031 | goto out; | |
1032 | } | |
1033 | sax = *usax; | |
1034 | if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) { | |
1035 | err = -EISCONN; | |
1036 | goto out; | |
1037 | } | |
1038 | if (sax.sax25_family != AF_NETROM) { | |
1039 | err = -EINVAL; | |
1040 | goto out; | |
1041 | } | |
1042 | } else { | |
1043 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1044 | err = -ENOTCONN; | |
1045 | goto out; | |
1046 | } | |
1047 | sax.sax25_family = AF_NETROM; | |
1048 | sax.sax25_call = nr->dest_addr; | |
1049 | } | |
1050 | ||
1051 | SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n"); | |
1052 | ||
1053 | /* Build a packet */ | |
1054 | SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n"); | |
1055 | size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN; | |
1056 | ||
1057 | if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) | |
1058 | goto out; | |
1059 | ||
1060 | skb_reserve(skb, size - len); | |
1061 | ||
1062 | /* | |
1063 | * Push down the NET/ROM header | |
1064 | */ | |
1065 | ||
1066 | asmptr = skb_push(skb, NR_TRANSPORT_LEN); | |
1067 | SOCK_DEBUG(sk, "Building NET/ROM Header.\n"); | |
1068 | ||
1069 | /* Build a NET/ROM Transport header */ | |
1070 | ||
1071 | *asmptr++ = nr->your_index; | |
1072 | *asmptr++ = nr->your_id; | |
1073 | *asmptr++ = 0; /* To be filled in later */ | |
1074 | *asmptr++ = 0; /* Ditto */ | |
1075 | *asmptr++ = NR_INFO; | |
1076 | SOCK_DEBUG(sk, "Built header.\n"); | |
1077 | ||
1078 | /* | |
1079 | * Put the data on the end | |
1080 | */ | |
1081 | ||
1082 | skb->h.raw = skb_put(skb, len); | |
1083 | ||
1084 | asmptr = skb->h.raw; | |
1085 | SOCK_DEBUG(sk, "NET/ROM: Appending user data\n"); | |
1086 | ||
1087 | /* User data follows immediately after the NET/ROM transport header */ | |
1088 | if (memcpy_fromiovec(asmptr, msg->msg_iov, len)) { | |
1089 | kfree_skb(skb); | |
1090 | err = -EFAULT; | |
1091 | goto out; | |
1092 | } | |
1093 | ||
1094 | SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n"); | |
1095 | ||
1096 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1097 | kfree_skb(skb); | |
1098 | err = -ENOTCONN; | |
1099 | goto out; | |
1100 | } | |
1101 | ||
1102 | nr_output(sk, skb); /* Shove it onto the queue */ | |
1103 | ||
1104 | err = len; | |
1105 | out: | |
1106 | release_sock(sk); | |
1107 | return err; | |
1108 | } | |
1109 | ||
1110 | static int nr_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1111 | struct msghdr *msg, size_t size, int flags) | |
1112 | { | |
1113 | struct sock *sk = sock->sk; | |
1114 | struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name; | |
1115 | size_t copied; | |
1116 | struct sk_buff *skb; | |
1117 | int er; | |
1118 | ||
1119 | /* | |
1120 | * This works for seqpacket too. The receiver has ordered the queue for | |
1121 | * us! We do one quick check first though | |
1122 | */ | |
1123 | ||
1124 | lock_sock(sk); | |
1125 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1126 | release_sock(sk); | |
1127 | return -ENOTCONN; | |
1128 | } | |
1129 | ||
1130 | /* Now we can treat all alike */ | |
1131 | if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) { | |
1132 | release_sock(sk); | |
1133 | return er; | |
1134 | } | |
1135 | ||
1136 | skb->h.raw = skb->data; | |
1137 | copied = skb->len; | |
1138 | ||
1139 | if (copied > size) { | |
1140 | copied = size; | |
1141 | msg->msg_flags |= MSG_TRUNC; | |
1142 | } | |
1143 | ||
1144 | skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
1145 | ||
1146 | if (sax != NULL) { | |
1147 | sax->sax25_family = AF_NETROM; | |
1148 | memcpy(sax->sax25_call.ax25_call, skb->data + 7, AX25_ADDR_LEN); | |
1149 | } | |
1150 | ||
1151 | msg->msg_namelen = sizeof(*sax); | |
1152 | ||
1153 | skb_free_datagram(sk, skb); | |
1154 | ||
1155 | release_sock(sk); | |
1156 | return copied; | |
1157 | } | |
1158 | ||
1159 | ||
1160 | static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1161 | { | |
1162 | struct sock *sk = sock->sk; | |
1163 | void __user *argp = (void __user *)arg; | |
1164 | int ret; | |
1165 | ||
1166 | lock_sock(sk); | |
1167 | switch (cmd) { | |
1168 | case TIOCOUTQ: { | |
1169 | long amount; | |
1170 | amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); | |
1171 | if (amount < 0) | |
1172 | amount = 0; | |
1173 | release_sock(sk); | |
1174 | return put_user(amount, (int __user *)argp); | |
1175 | } | |
1176 | ||
1177 | case TIOCINQ: { | |
1178 | struct sk_buff *skb; | |
1179 | long amount = 0L; | |
1180 | /* These two are safe on a single CPU system as only user tasks fiddle here */ | |
1181 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) | |
1182 | amount = skb->len; | |
1183 | release_sock(sk); | |
1184 | return put_user(amount, (int __user *)argp); | |
1185 | } | |
1186 | ||
1187 | case SIOCGSTAMP: | |
1188 | ret = -EINVAL; | |
1189 | if (sk != NULL) | |
1190 | ret = sock_get_timestamp(sk, argp); | |
1191 | release_sock(sk); | |
1192 | return ret; | |
1193 | ||
1194 | case SIOCGIFADDR: | |
1195 | case SIOCSIFADDR: | |
1196 | case SIOCGIFDSTADDR: | |
1197 | case SIOCSIFDSTADDR: | |
1198 | case SIOCGIFBRDADDR: | |
1199 | case SIOCSIFBRDADDR: | |
1200 | case SIOCGIFNETMASK: | |
1201 | case SIOCSIFNETMASK: | |
1202 | case SIOCGIFMETRIC: | |
1203 | case SIOCSIFMETRIC: | |
1204 | release_sock(sk); | |
1205 | return -EINVAL; | |
1206 | ||
1207 | case SIOCADDRT: | |
1208 | case SIOCDELRT: | |
1209 | case SIOCNRDECOBS: | |
1210 | release_sock(sk); | |
1211 | if (!capable(CAP_NET_ADMIN)) return -EPERM; | |
1212 | return nr_rt_ioctl(cmd, argp); | |
1213 | ||
1214 | default: | |
1215 | release_sock(sk); | |
1216 | return dev_ioctl(cmd, argp); | |
1217 | } | |
1218 | release_sock(sk); | |
1219 | ||
1220 | return 0; | |
1221 | } | |
1222 | ||
1223 | #ifdef CONFIG_PROC_FS | |
1224 | ||
1225 | static void *nr_info_start(struct seq_file *seq, loff_t *pos) | |
1226 | { | |
1227 | struct sock *s; | |
1228 | struct hlist_node *node; | |
1229 | int i = 1; | |
1230 | ||
1231 | spin_lock_bh(&nr_list_lock); | |
1232 | if (*pos == 0) | |
1233 | return SEQ_START_TOKEN; | |
1234 | ||
1235 | sk_for_each(s, node, &nr_list) { | |
1236 | if (i == *pos) | |
1237 | return s; | |
1238 | ++i; | |
1239 | } | |
1240 | return NULL; | |
1241 | } | |
1242 | ||
1243 | static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos) | |
1244 | { | |
1245 | ++*pos; | |
1246 | ||
1247 | return (v == SEQ_START_TOKEN) ? sk_head(&nr_list) | |
1248 | : sk_next((struct sock *)v); | |
1249 | } | |
1250 | ||
1251 | static void nr_info_stop(struct seq_file *seq, void *v) | |
1252 | { | |
1253 | spin_unlock_bh(&nr_list_lock); | |
1254 | } | |
1255 | ||
1256 | static int nr_info_show(struct seq_file *seq, void *v) | |
1257 | { | |
1258 | struct sock *s = v; | |
1259 | struct net_device *dev; | |
1260 | struct nr_sock *nr; | |
1261 | const char *devname; | |
1262 | ||
1263 | if (v == SEQ_START_TOKEN) | |
1264 | seq_puts(seq, | |
1265 | "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"); | |
1266 | ||
1267 | else { | |
1268 | ||
1269 | bh_lock_sock(s); | |
1270 | nr = nr_sk(s); | |
1271 | ||
1272 | if ((dev = nr->device) == NULL) | |
1273 | devname = "???"; | |
1274 | else | |
1275 | devname = dev->name; | |
1276 | ||
1277 | seq_printf(seq, "%-9s ", ax2asc(&nr->user_addr)); | |
1278 | seq_printf(seq, "%-9s ", ax2asc(&nr->dest_addr)); | |
1279 | seq_printf(seq, | |
1280 | "%-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", | |
1281 | ax2asc(&nr->source_addr), | |
1282 | devname, | |
1283 | nr->my_index, | |
1284 | nr->my_id, | |
1285 | nr->your_index, | |
1286 | nr->your_id, | |
1287 | nr->state, | |
1288 | nr->vs, | |
1289 | nr->vr, | |
1290 | nr->va, | |
1291 | ax25_display_timer(&nr->t1timer) / HZ, | |
1292 | nr->t1 / HZ, | |
1293 | ax25_display_timer(&nr->t2timer) / HZ, | |
1294 | nr->t2 / HZ, | |
1295 | ax25_display_timer(&nr->t4timer) / HZ, | |
1296 | nr->t4 / HZ, | |
1297 | ax25_display_timer(&nr->idletimer) / (60 * HZ), | |
1298 | nr->idle / (60 * HZ), | |
1299 | nr->n2count, | |
1300 | nr->n2, | |
1301 | nr->window, | |
1302 | atomic_read(&s->sk_wmem_alloc), | |
1303 | atomic_read(&s->sk_rmem_alloc), | |
1304 | s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); | |
1305 | ||
1306 | bh_unlock_sock(s); | |
1307 | } | |
1308 | return 0; | |
1309 | } | |
1310 | ||
1311 | static struct seq_operations nr_info_seqops = { | |
1312 | .start = nr_info_start, | |
1313 | .next = nr_info_next, | |
1314 | .stop = nr_info_stop, | |
1315 | .show = nr_info_show, | |
1316 | }; | |
1317 | ||
1318 | static int nr_info_open(struct inode *inode, struct file *file) | |
1319 | { | |
1320 | return seq_open(file, &nr_info_seqops); | |
1321 | } | |
1322 | ||
1323 | static struct file_operations nr_info_fops = { | |
1324 | .owner = THIS_MODULE, | |
1325 | .open = nr_info_open, | |
1326 | .read = seq_read, | |
1327 | .llseek = seq_lseek, | |
1328 | .release = seq_release, | |
1329 | }; | |
1330 | #endif /* CONFIG_PROC_FS */ | |
1331 | ||
1332 | static struct net_proto_family nr_family_ops = { | |
1333 | .family = PF_NETROM, | |
1334 | .create = nr_create, | |
1335 | .owner = THIS_MODULE, | |
1336 | }; | |
1337 | ||
1338 | static struct proto_ops nr_proto_ops = { | |
1339 | .family = PF_NETROM, | |
1340 | .owner = THIS_MODULE, | |
1341 | .release = nr_release, | |
1342 | .bind = nr_bind, | |
1343 | .connect = nr_connect, | |
1344 | .socketpair = sock_no_socketpair, | |
1345 | .accept = nr_accept, | |
1346 | .getname = nr_getname, | |
1347 | .poll = datagram_poll, | |
1348 | .ioctl = nr_ioctl, | |
1349 | .listen = nr_listen, | |
1350 | .shutdown = sock_no_shutdown, | |
1351 | .setsockopt = nr_setsockopt, | |
1352 | .getsockopt = nr_getsockopt, | |
1353 | .sendmsg = nr_sendmsg, | |
1354 | .recvmsg = nr_recvmsg, | |
1355 | .mmap = sock_no_mmap, | |
1356 | .sendpage = sock_no_sendpage, | |
1357 | }; | |
1358 | ||
1359 | static struct notifier_block nr_dev_notifier = { | |
1360 | .notifier_call = nr_device_event, | |
1361 | }; | |
1362 | ||
1363 | static struct net_device **dev_nr; | |
1364 | ||
1365 | static char banner[] __initdata = KERN_INFO "G4KLX NET/ROM for Linux. Version 0.7 for AX25.037 Linux 2.4\n"; | |
1366 | ||
1367 | static int __init nr_proto_init(void) | |
1368 | { | |
1369 | int i; | |
1370 | int rc = proto_register(&nr_proto, 0); | |
1371 | ||
1372 | if (rc != 0) | |
1373 | goto out; | |
1374 | ||
1375 | if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) { | |
1376 | printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n"); | |
1377 | return -1; | |
1378 | } | |
1379 | ||
1380 | dev_nr = kmalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL); | |
1381 | if (dev_nr == NULL) { | |
1382 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n"); | |
1383 | return -1; | |
1384 | } | |
1385 | ||
1386 | memset(dev_nr, 0x00, nr_ndevs * sizeof(struct net_device *)); | |
1387 | ||
1388 | for (i = 0; i < nr_ndevs; i++) { | |
1389 | char name[IFNAMSIZ]; | |
1390 | struct net_device *dev; | |
1391 | ||
1392 | sprintf(name, "nr%d", i); | |
1393 | dev = alloc_netdev(sizeof(struct net_device_stats), name, | |
1394 | nr_setup); | |
1395 | if (!dev) { | |
1396 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n"); | |
1397 | goto fail; | |
1398 | } | |
1399 | ||
1400 | dev->base_addr = i; | |
1401 | if (register_netdev(dev)) { | |
1402 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n"); | |
1403 | free_netdev(dev); | |
1404 | goto fail; | |
1405 | } | |
1406 | dev_nr[i] = dev; | |
1407 | } | |
1408 | ||
1409 | if (sock_register(&nr_family_ops)) { | |
1410 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n"); | |
1411 | goto fail; | |
1412 | } | |
1413 | ||
1414 | register_netdevice_notifier(&nr_dev_notifier); | |
1415 | printk(banner); | |
1416 | ||
1417 | ax25_protocol_register(AX25_P_NETROM, nr_route_frame); | |
1418 | ax25_linkfail_register(nr_link_failed); | |
1419 | ||
1420 | #ifdef CONFIG_SYSCTL | |
1421 | nr_register_sysctl(); | |
1422 | #endif | |
1423 | ||
1424 | nr_loopback_init(); | |
1425 | ||
1426 | proc_net_fops_create("nr", S_IRUGO, &nr_info_fops); | |
1427 | proc_net_fops_create("nr_neigh", S_IRUGO, &nr_neigh_fops); | |
1428 | proc_net_fops_create("nr_nodes", S_IRUGO, &nr_nodes_fops); | |
1429 | out: | |
1430 | return rc; | |
1431 | fail: | |
1432 | while (--i >= 0) { | |
1433 | unregister_netdev(dev_nr[i]); | |
1434 | free_netdev(dev_nr[i]); | |
1435 | } | |
1436 | kfree(dev_nr); | |
1437 | proto_unregister(&nr_proto); | |
1438 | rc = -1; | |
1439 | goto out; | |
1440 | } | |
1441 | ||
1442 | module_init(nr_proto_init); | |
1443 | ||
1444 | module_param(nr_ndevs, int, 0); | |
1445 | MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices"); | |
1446 | ||
1447 | MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); | |
1448 | MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol"); | |
1449 | MODULE_LICENSE("GPL"); | |
1450 | MODULE_ALIAS_NETPROTO(PF_NETROM); | |
1451 | ||
1452 | static void __exit nr_exit(void) | |
1453 | { | |
1454 | int i; | |
1455 | ||
1456 | proc_net_remove("nr"); | |
1457 | proc_net_remove("nr_neigh"); | |
1458 | proc_net_remove("nr_nodes"); | |
1459 | nr_loopback_clear(); | |
1460 | ||
1461 | nr_rt_free(); | |
1462 | ||
1463 | #ifdef CONFIG_SYSCTL | |
1464 | nr_unregister_sysctl(); | |
1465 | #endif | |
1466 | ||
1467 | ax25_linkfail_release(nr_link_failed); | |
1468 | ax25_protocol_release(AX25_P_NETROM); | |
1469 | ||
1470 | unregister_netdevice_notifier(&nr_dev_notifier); | |
1471 | ||
1472 | sock_unregister(PF_NETROM); | |
1473 | ||
1474 | for (i = 0; i < nr_ndevs; i++) { | |
1475 | struct net_device *dev = dev_nr[i]; | |
1476 | if (dev) { | |
1477 | unregister_netdev(dev); | |
1478 | free_netdev(dev); | |
1479 | } | |
1480 | } | |
1481 | ||
1482 | kfree(dev_nr); | |
1483 | proto_unregister(&nr_proto); | |
1484 | } | |
1485 | module_exit(nr_exit); |