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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 | */ | |
1da177e4 LT |
11 | #include <linux/module.h> |
12 | #include <linux/moduleparam.h> | |
4fc268d2 | 13 | #include <linux/capability.h> |
1da177e4 LT |
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; | |
e21ce8c7 | 59 | int sysctl_netrom_reset_circuit = NR_DEFAULT_RESET; |
1da177e4 LT |
60 | |
61 | static unsigned short circuit = 0x101; | |
62 | ||
63 | static HLIST_HEAD(nr_list); | |
64 | static DEFINE_SPINLOCK(nr_list_lock); | |
65 | ||
90ddc4f0 | 66 | static const struct proto_ops nr_proto_ops; |
1da177e4 | 67 | |
4b260a98 RB |
68 | /* |
69 | * NETROM network devices are virtual network devices encapsulating NETROM | |
70 | * frames into AX.25 which will be sent through an AX.25 device, so form a | |
71 | * special "super class" of normal net devices; split their locks off into a | |
72 | * separate class since they always nest. | |
73 | */ | |
74 | static struct lock_class_key nr_netdev_xmit_lock_key; | |
75 | ||
1da177e4 LT |
76 | /* |
77 | * Socket removal during an interrupt is now safe. | |
78 | */ | |
79 | static void nr_remove_socket(struct sock *sk) | |
80 | { | |
81 | spin_lock_bh(&nr_list_lock); | |
82 | sk_del_node_init(sk); | |
83 | spin_unlock_bh(&nr_list_lock); | |
84 | } | |
85 | ||
86 | /* | |
87 | * Kill all bound sockets on a dropped device. | |
88 | */ | |
89 | static void nr_kill_by_device(struct net_device *dev) | |
90 | { | |
91 | struct sock *s; | |
92 | struct hlist_node *node; | |
93 | ||
94 | spin_lock_bh(&nr_list_lock); | |
95 | sk_for_each(s, node, &nr_list) | |
96 | if (nr_sk(s)->device == dev) | |
97 | nr_disconnect(s, ENETUNREACH); | |
98 | spin_unlock_bh(&nr_list_lock); | |
99 | } | |
100 | ||
101 | /* | |
102 | * Handle device status changes. | |
103 | */ | |
104 | static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr) | |
105 | { | |
106 | struct net_device *dev = (struct net_device *)ptr; | |
107 | ||
108 | if (event != NETDEV_DOWN) | |
109 | return NOTIFY_DONE; | |
110 | ||
111 | nr_kill_by_device(dev); | |
112 | nr_rt_device_down(dev); | |
5f8f59d6 | 113 | |
1da177e4 LT |
114 | return NOTIFY_DONE; |
115 | } | |
116 | ||
117 | /* | |
118 | * Add a socket to the bound sockets list. | |
119 | */ | |
120 | static void nr_insert_socket(struct sock *sk) | |
121 | { | |
122 | spin_lock_bh(&nr_list_lock); | |
123 | sk_add_node(sk, &nr_list); | |
124 | spin_unlock_bh(&nr_list_lock); | |
125 | } | |
126 | ||
127 | /* | |
128 | * Find a socket that wants to accept the Connect Request we just | |
129 | * received. | |
130 | */ | |
131 | static struct sock *nr_find_listener(ax25_address *addr) | |
132 | { | |
133 | struct sock *s; | |
134 | struct hlist_node *node; | |
135 | ||
136 | spin_lock_bh(&nr_list_lock); | |
137 | sk_for_each(s, node, &nr_list) | |
138 | if (!ax25cmp(&nr_sk(s)->source_addr, addr) && | |
139 | s->sk_state == TCP_LISTEN) { | |
5f8f59d6 | 140 | bh_lock_sock(s); |
1da177e4 LT |
141 | goto found; |
142 | } | |
143 | s = NULL; | |
144 | found: | |
145 | spin_unlock_bh(&nr_list_lock); | |
146 | return s; | |
147 | } | |
148 | ||
149 | /* | |
150 | * Find a connected NET/ROM socket given my circuit IDs. | |
151 | */ | |
152 | static struct sock *nr_find_socket(unsigned char index, unsigned char id) | |
153 | { | |
154 | struct sock *s; | |
155 | struct hlist_node *node; | |
156 | ||
157 | spin_lock_bh(&nr_list_lock); | |
158 | sk_for_each(s, node, &nr_list) { | |
159 | struct nr_sock *nr = nr_sk(s); | |
5f8f59d6 | 160 | |
1da177e4 LT |
161 | if (nr->my_index == index && nr->my_id == id) { |
162 | bh_lock_sock(s); | |
163 | goto found; | |
164 | } | |
165 | } | |
166 | s = NULL; | |
167 | found: | |
168 | spin_unlock_bh(&nr_list_lock); | |
169 | return s; | |
170 | } | |
171 | ||
172 | /* | |
173 | * Find a connected NET/ROM socket given their circuit IDs. | |
174 | */ | |
175 | static struct sock *nr_find_peer(unsigned char index, unsigned char id, | |
176 | ax25_address *dest) | |
177 | { | |
178 | struct sock *s; | |
179 | struct hlist_node *node; | |
180 | ||
181 | spin_lock_bh(&nr_list_lock); | |
182 | sk_for_each(s, node, &nr_list) { | |
183 | struct nr_sock *nr = nr_sk(s); | |
5f8f59d6 | 184 | |
1da177e4 LT |
185 | if (nr->your_index == index && nr->your_id == id && |
186 | !ax25cmp(&nr->dest_addr, dest)) { | |
5f8f59d6 | 187 | bh_lock_sock(s); |
1da177e4 LT |
188 | goto found; |
189 | } | |
190 | } | |
191 | s = NULL; | |
192 | found: | |
193 | spin_unlock_bh(&nr_list_lock); | |
194 | return s; | |
195 | } | |
196 | ||
197 | /* | |
198 | * Find next free circuit ID. | |
199 | */ | |
200 | static unsigned short nr_find_next_circuit(void) | |
201 | { | |
202 | unsigned short id = circuit; | |
203 | unsigned char i, j; | |
204 | struct sock *sk; | |
205 | ||
206 | for (;;) { | |
207 | i = id / 256; | |
208 | j = id % 256; | |
209 | ||
210 | if (i != 0 && j != 0) { | |
211 | if ((sk=nr_find_socket(i, j)) == NULL) | |
212 | break; | |
213 | bh_unlock_sock(sk); | |
214 | } | |
215 | ||
216 | id++; | |
217 | } | |
218 | ||
219 | return id; | |
220 | } | |
221 | ||
222 | /* | |
223 | * Deferred destroy. | |
224 | */ | |
225 | void nr_destroy_socket(struct sock *); | |
226 | ||
227 | /* | |
228 | * Handler for deferred kills. | |
229 | */ | |
230 | static void nr_destroy_timer(unsigned long data) | |
231 | { | |
232 | struct sock *sk=(struct sock *)data; | |
233 | bh_lock_sock(sk); | |
234 | sock_hold(sk); | |
235 | nr_destroy_socket(sk); | |
236 | bh_unlock_sock(sk); | |
237 | sock_put(sk); | |
238 | } | |
239 | ||
240 | /* | |
241 | * This is called from user mode and the timers. Thus it protects itself | |
242 | * against interrupt users but doesn't worry about being called during | |
243 | * work. Once it is removed from the queue no interrupt or bottom half | |
244 | * will touch it and we are (fairly 8-) ) safe. | |
245 | */ | |
246 | void nr_destroy_socket(struct sock *sk) | |
247 | { | |
248 | struct sk_buff *skb; | |
249 | ||
250 | nr_remove_socket(sk); | |
251 | ||
252 | nr_stop_heartbeat(sk); | |
253 | nr_stop_t1timer(sk); | |
254 | nr_stop_t2timer(sk); | |
255 | nr_stop_t4timer(sk); | |
256 | nr_stop_idletimer(sk); | |
257 | ||
258 | nr_clear_queues(sk); /* Flush the queues */ | |
259 | ||
260 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
261 | if (skb->sk != sk) { /* A pending connection */ | |
262 | /* Queue the unaccepted socket for death */ | |
263 | sock_set_flag(skb->sk, SOCK_DEAD); | |
264 | nr_start_heartbeat(skb->sk); | |
265 | nr_sk(skb->sk)->state = NR_STATE_0; | |
266 | } | |
267 | ||
268 | kfree_skb(skb); | |
269 | } | |
270 | ||
271 | if (atomic_read(&sk->sk_wmem_alloc) || | |
272 | atomic_read(&sk->sk_rmem_alloc)) { | |
273 | /* Defer: outstanding buffers */ | |
274 | sk->sk_timer.function = nr_destroy_timer; | |
275 | sk->sk_timer.expires = jiffies + 2 * HZ; | |
276 | add_timer(&sk->sk_timer); | |
277 | } else | |
278 | sock_put(sk); | |
279 | } | |
280 | ||
281 | /* | |
282 | * Handling for system calls applied via the various interfaces to a | |
283 | * NET/ROM socket object. | |
284 | */ | |
285 | ||
286 | static int nr_setsockopt(struct socket *sock, int level, int optname, | |
287 | char __user *optval, int optlen) | |
288 | { | |
289 | struct sock *sk = sock->sk; | |
290 | struct nr_sock *nr = nr_sk(sk); | |
291 | int opt; | |
292 | ||
293 | if (level != SOL_NETROM) | |
294 | return -ENOPROTOOPT; | |
295 | ||
296 | if (optlen < sizeof(int)) | |
297 | return -EINVAL; | |
298 | ||
299 | if (get_user(opt, (int __user *)optval)) | |
300 | return -EFAULT; | |
301 | ||
302 | switch (optname) { | |
303 | case NETROM_T1: | |
304 | if (opt < 1) | |
305 | return -EINVAL; | |
306 | nr->t1 = opt * HZ; | |
307 | return 0; | |
308 | ||
309 | case NETROM_T2: | |
310 | if (opt < 1) | |
311 | return -EINVAL; | |
312 | nr->t2 = opt * HZ; | |
313 | return 0; | |
314 | ||
315 | case NETROM_N2: | |
316 | if (opt < 1 || opt > 31) | |
317 | return -EINVAL; | |
318 | nr->n2 = opt; | |
319 | return 0; | |
320 | ||
321 | case NETROM_T4: | |
322 | if (opt < 1) | |
323 | return -EINVAL; | |
324 | nr->t4 = opt * HZ; | |
325 | return 0; | |
326 | ||
327 | case NETROM_IDLE: | |
328 | if (opt < 0) | |
329 | return -EINVAL; | |
330 | nr->idle = opt * 60 * HZ; | |
331 | return 0; | |
332 | ||
333 | default: | |
334 | return -ENOPROTOOPT; | |
335 | } | |
336 | } | |
337 | ||
338 | static int nr_getsockopt(struct socket *sock, int level, int optname, | |
339 | char __user *optval, int __user *optlen) | |
340 | { | |
341 | struct sock *sk = sock->sk; | |
342 | struct nr_sock *nr = nr_sk(sk); | |
343 | int val = 0; | |
5f8f59d6 | 344 | int len; |
1da177e4 LT |
345 | |
346 | if (level != SOL_NETROM) | |
347 | return -ENOPROTOOPT; | |
5f8f59d6 | 348 | |
1da177e4 LT |
349 | if (get_user(len, optlen)) |
350 | return -EFAULT; | |
351 | ||
352 | if (len < 0) | |
353 | return -EINVAL; | |
5f8f59d6 | 354 | |
1da177e4 LT |
355 | switch (optname) { |
356 | case NETROM_T1: | |
357 | val = nr->t1 / HZ; | |
358 | break; | |
359 | ||
360 | case NETROM_T2: | |
361 | val = nr->t2 / HZ; | |
362 | break; | |
363 | ||
364 | case NETROM_N2: | |
365 | val = nr->n2; | |
366 | break; | |
367 | ||
368 | case NETROM_T4: | |
369 | val = nr->t4 / HZ; | |
370 | break; | |
371 | ||
372 | case NETROM_IDLE: | |
373 | val = nr->idle / (60 * HZ); | |
374 | break; | |
375 | ||
376 | default: | |
377 | return -ENOPROTOOPT; | |
378 | } | |
379 | ||
380 | len = min_t(unsigned int, len, sizeof(int)); | |
381 | ||
382 | if (put_user(len, optlen)) | |
383 | return -EFAULT; | |
384 | ||
385 | return copy_to_user(optval, &val, len) ? -EFAULT : 0; | |
386 | } | |
387 | ||
388 | static int nr_listen(struct socket *sock, int backlog) | |
389 | { | |
390 | struct sock *sk = sock->sk; | |
391 | ||
392 | lock_sock(sk); | |
393 | if (sk->sk_state != TCP_LISTEN) { | |
394 | memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN); | |
395 | sk->sk_max_ack_backlog = backlog; | |
396 | sk->sk_state = TCP_LISTEN; | |
397 | release_sock(sk); | |
398 | return 0; | |
399 | } | |
400 | release_sock(sk); | |
401 | ||
402 | return -EOPNOTSUPP; | |
403 | } | |
404 | ||
405 | static struct proto nr_proto = { | |
406 | .name = "NETROM", | |
407 | .owner = THIS_MODULE, | |
408 | .obj_size = sizeof(struct nr_sock), | |
409 | }; | |
410 | ||
411 | static int nr_create(struct socket *sock, int protocol) | |
412 | { | |
413 | struct sock *sk; | |
414 | struct nr_sock *nr; | |
415 | ||
416 | if (sock->type != SOCK_SEQPACKET || protocol != 0) | |
417 | return -ESOCKTNOSUPPORT; | |
418 | ||
419 | if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, &nr_proto, 1)) == NULL) | |
420 | return -ENOMEM; | |
421 | ||
422 | nr = nr_sk(sk); | |
423 | ||
424 | sock_init_data(sock, sk); | |
425 | ||
426 | sock->ops = &nr_proto_ops; | |
427 | sk->sk_protocol = protocol; | |
428 | ||
429 | skb_queue_head_init(&nr->ack_queue); | |
430 | skb_queue_head_init(&nr->reseq_queue); | |
431 | skb_queue_head_init(&nr->frag_queue); | |
432 | ||
433 | nr_init_timers(sk); | |
434 | ||
4d8937d0 RB |
435 | nr->t1 = |
436 | msecs_to_jiffies(sysctl_netrom_transport_timeout); | |
437 | nr->t2 = | |
438 | msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay); | |
439 | nr->n2 = | |
440 | msecs_to_jiffies(sysctl_netrom_transport_maximum_tries); | |
441 | nr->t4 = | |
442 | msecs_to_jiffies(sysctl_netrom_transport_busy_delay); | |
443 | nr->idle = | |
444 | msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout); | |
1da177e4 LT |
445 | nr->window = sysctl_netrom_transport_requested_window_size; |
446 | ||
447 | nr->bpqext = 1; | |
448 | nr->state = NR_STATE_0; | |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
453 | static struct sock *nr_make_new(struct sock *osk) | |
454 | { | |
455 | struct sock *sk; | |
456 | struct nr_sock *nr, *onr; | |
457 | ||
458 | if (osk->sk_type != SOCK_SEQPACKET) | |
459 | return NULL; | |
460 | ||
461 | if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, osk->sk_prot, 1)) == NULL) | |
462 | return NULL; | |
463 | ||
464 | nr = nr_sk(sk); | |
465 | ||
466 | sock_init_data(NULL, sk); | |
467 | ||
468 | sk->sk_type = osk->sk_type; | |
469 | sk->sk_socket = osk->sk_socket; | |
470 | sk->sk_priority = osk->sk_priority; | |
471 | sk->sk_protocol = osk->sk_protocol; | |
472 | sk->sk_rcvbuf = osk->sk_rcvbuf; | |
473 | sk->sk_sndbuf = osk->sk_sndbuf; | |
474 | sk->sk_state = TCP_ESTABLISHED; | |
475 | sk->sk_sleep = osk->sk_sleep; | |
53b924b3 | 476 | sock_copy_flags(sk, osk); |
1da177e4 LT |
477 | |
478 | skb_queue_head_init(&nr->ack_queue); | |
479 | skb_queue_head_init(&nr->reseq_queue); | |
480 | skb_queue_head_init(&nr->frag_queue); | |
481 | ||
482 | nr_init_timers(sk); | |
483 | ||
484 | onr = nr_sk(osk); | |
485 | ||
486 | nr->t1 = onr->t1; | |
487 | nr->t2 = onr->t2; | |
488 | nr->n2 = onr->n2; | |
489 | nr->t4 = onr->t4; | |
490 | nr->idle = onr->idle; | |
491 | nr->window = onr->window; | |
492 | ||
493 | nr->device = onr->device; | |
494 | nr->bpqext = onr->bpqext; | |
495 | ||
496 | return sk; | |
497 | } | |
498 | ||
499 | static int nr_release(struct socket *sock) | |
500 | { | |
501 | struct sock *sk = sock->sk; | |
502 | struct nr_sock *nr; | |
503 | ||
504 | if (sk == NULL) return 0; | |
505 | ||
506 | sock_hold(sk); | |
507 | lock_sock(sk); | |
508 | nr = nr_sk(sk); | |
509 | ||
510 | switch (nr->state) { | |
511 | case NR_STATE_0: | |
512 | case NR_STATE_1: | |
513 | case NR_STATE_2: | |
514 | nr_disconnect(sk, 0); | |
515 | nr_destroy_socket(sk); | |
516 | break; | |
517 | ||
518 | case NR_STATE_3: | |
519 | nr_clear_queues(sk); | |
520 | nr->n2count = 0; | |
521 | nr_write_internal(sk, NR_DISCREQ); | |
522 | nr_start_t1timer(sk); | |
523 | nr_stop_t2timer(sk); | |
524 | nr_stop_t4timer(sk); | |
525 | nr_stop_idletimer(sk); | |
526 | nr->state = NR_STATE_2; | |
527 | sk->sk_state = TCP_CLOSE; | |
528 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
529 | sk->sk_state_change(sk); | |
530 | sock_orphan(sk); | |
531 | sock_set_flag(sk, SOCK_DESTROY); | |
532 | sk->sk_socket = NULL; | |
533 | break; | |
534 | ||
535 | default: | |
536 | sk->sk_socket = NULL; | |
537 | break; | |
538 | } | |
539 | ||
5f8f59d6 | 540 | sock->sk = NULL; |
1da177e4 LT |
541 | release_sock(sk); |
542 | sock_put(sk); | |
543 | ||
544 | return 0; | |
545 | } | |
546 | ||
547 | static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
548 | { | |
549 | struct sock *sk = sock->sk; | |
550 | struct nr_sock *nr = nr_sk(sk); | |
551 | struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr; | |
552 | struct net_device *dev; | |
01d7dd0e RB |
553 | ax25_uid_assoc *user; |
554 | ax25_address *source; | |
1da177e4 LT |
555 | |
556 | lock_sock(sk); | |
557 | if (!sock_flag(sk, SOCK_ZAPPED)) { | |
558 | release_sock(sk); | |
559 | return -EINVAL; | |
560 | } | |
561 | if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) { | |
562 | release_sock(sk); | |
563 | return -EINVAL; | |
564 | } | |
565 | if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) { | |
566 | release_sock(sk); | |
567 | return -EINVAL; | |
568 | } | |
569 | if (addr->fsa_ax25.sax25_family != AF_NETROM) { | |
570 | release_sock(sk); | |
571 | return -EINVAL; | |
572 | } | |
573 | if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) { | |
574 | SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n"); | |
575 | release_sock(sk); | |
576 | return -EADDRNOTAVAIL; | |
577 | } | |
578 | ||
579 | /* | |
580 | * Only the super user can set an arbitrary user callsign. | |
581 | */ | |
582 | if (addr->fsa_ax25.sax25_ndigis == 1) { | |
583 | if (!capable(CAP_NET_BIND_SERVICE)) { | |
584 | dev_put(dev); | |
585 | release_sock(sk); | |
586 | return -EACCES; | |
587 | } | |
588 | nr->user_addr = addr->fsa_digipeater[0]; | |
589 | nr->source_addr = addr->fsa_ax25.sax25_call; | |
590 | } else { | |
591 | source = &addr->fsa_ax25.sax25_call; | |
592 | ||
01d7dd0e RB |
593 | user = ax25_findbyuid(current->euid); |
594 | if (user) { | |
595 | nr->user_addr = user->call; | |
596 | ax25_uid_put(user); | |
597 | } else { | |
1da177e4 LT |
598 | if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) { |
599 | release_sock(sk); | |
600 | dev_put(dev); | |
601 | return -EPERM; | |
602 | } | |
01d7dd0e | 603 | nr->user_addr = *source; |
1da177e4 LT |
604 | } |
605 | ||
1da177e4 LT |
606 | nr->source_addr = *source; |
607 | } | |
608 | ||
609 | nr->device = dev; | |
610 | nr_insert_socket(sk); | |
611 | ||
612 | sock_reset_flag(sk, SOCK_ZAPPED); | |
613 | dev_put(dev); | |
614 | release_sock(sk); | |
615 | SOCK_DEBUG(sk, "NET/ROM: socket is bound\n"); | |
616 | return 0; | |
617 | } | |
618 | ||
619 | static int nr_connect(struct socket *sock, struct sockaddr *uaddr, | |
620 | int addr_len, int flags) | |
621 | { | |
622 | struct sock *sk = sock->sk; | |
623 | struct nr_sock *nr = nr_sk(sk); | |
624 | struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr; | |
01d7dd0e RB |
625 | ax25_address *source = NULL; |
626 | ax25_uid_assoc *user; | |
1da177e4 | 627 | struct net_device *dev; |
75606dc6 | 628 | int err = 0; |
1da177e4 LT |
629 | |
630 | lock_sock(sk); | |
631 | if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { | |
632 | sock->state = SS_CONNECTED; | |
75606dc6 | 633 | goto out_release; /* Connect completed during a ERESTARTSYS event */ |
1da177e4 LT |
634 | } |
635 | ||
636 | if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { | |
637 | sock->state = SS_UNCONNECTED; | |
75606dc6 RB |
638 | err = -ECONNREFUSED; |
639 | goto out_release; | |
1da177e4 LT |
640 | } |
641 | ||
642 | if (sk->sk_state == TCP_ESTABLISHED) { | |
75606dc6 RB |
643 | err = -EISCONN; /* No reconnect on a seqpacket socket */ |
644 | goto out_release; | |
1da177e4 LT |
645 | } |
646 | ||
5f8f59d6 | 647 | sk->sk_state = TCP_CLOSE; |
1da177e4 LT |
648 | sock->state = SS_UNCONNECTED; |
649 | ||
650 | if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) { | |
75606dc6 RB |
651 | err = -EINVAL; |
652 | goto out_release; | |
1da177e4 LT |
653 | } |
654 | if (addr->sax25_family != AF_NETROM) { | |
75606dc6 RB |
655 | err = -EINVAL; |
656 | goto out_release; | |
1da177e4 LT |
657 | } |
658 | if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ | |
659 | sock_reset_flag(sk, SOCK_ZAPPED); | |
660 | ||
661 | if ((dev = nr_dev_first()) == NULL) { | |
75606dc6 RB |
662 | err = -ENETUNREACH; |
663 | goto out_release; | |
1da177e4 LT |
664 | } |
665 | source = (ax25_address *)dev->dev_addr; | |
666 | ||
01d7dd0e RB |
667 | user = ax25_findbyuid(current->euid); |
668 | if (user) { | |
669 | nr->user_addr = user->call; | |
670 | ax25_uid_put(user); | |
671 | } else { | |
1da177e4 LT |
672 | if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) { |
673 | dev_put(dev); | |
75606dc6 RB |
674 | err = -EPERM; |
675 | goto out_release; | |
1da177e4 | 676 | } |
01d7dd0e | 677 | nr->user_addr = *source; |
1da177e4 LT |
678 | } |
679 | ||
1da177e4 LT |
680 | nr->source_addr = *source; |
681 | nr->device = dev; | |
682 | ||
683 | dev_put(dev); | |
684 | nr_insert_socket(sk); /* Finish the bind */ | |
685 | } | |
686 | ||
687 | nr->dest_addr = addr->sax25_call; | |
688 | ||
689 | release_sock(sk); | |
690 | circuit = nr_find_next_circuit(); | |
691 | lock_sock(sk); | |
692 | ||
693 | nr->my_index = circuit / 256; | |
694 | nr->my_id = circuit % 256; | |
695 | ||
696 | circuit++; | |
697 | ||
698 | /* Move to connecting socket, start sending Connect Requests */ | |
699 | sock->state = SS_CONNECTING; | |
700 | sk->sk_state = TCP_SYN_SENT; | |
701 | ||
702 | nr_establish_data_link(sk); | |
703 | ||
704 | nr->state = NR_STATE_1; | |
705 | ||
706 | nr_start_heartbeat(sk); | |
707 | ||
708 | /* Now the loop */ | |
709 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { | |
75606dc6 RB |
710 | err = -EINPROGRESS; |
711 | goto out_release; | |
1da177e4 | 712 | } |
5f8f59d6 | 713 | |
1da177e4 LT |
714 | /* |
715 | * A Connect Ack with Choke or timeout or failed routing will go to | |
716 | * closed. | |
717 | */ | |
718 | if (sk->sk_state == TCP_SYN_SENT) { | |
75606dc6 | 719 | DEFINE_WAIT(wait); |
1da177e4 | 720 | |
1da177e4 | 721 | for (;;) { |
75606dc6 RB |
722 | prepare_to_wait(sk->sk_sleep, &wait, |
723 | TASK_INTERRUPTIBLE); | |
1da177e4 LT |
724 | if (sk->sk_state != TCP_SYN_SENT) |
725 | break; | |
75606dc6 RB |
726 | if (!signal_pending(current)) { |
727 | release_sock(sk); | |
1da177e4 LT |
728 | schedule(); |
729 | lock_sock(sk); | |
730 | continue; | |
731 | } | |
75606dc6 RB |
732 | err = -ERESTARTSYS; |
733 | break; | |
1da177e4 | 734 | } |
75606dc6 RB |
735 | finish_wait(sk->sk_sleep, &wait); |
736 | if (err) | |
737 | goto out_release; | |
1da177e4 LT |
738 | } |
739 | ||
740 | if (sk->sk_state != TCP_ESTABLISHED) { | |
741 | sock->state = SS_UNCONNECTED; | |
75606dc6 RB |
742 | err = sock_error(sk); /* Always set at this point */ |
743 | goto out_release; | |
1da177e4 LT |
744 | } |
745 | ||
746 | sock->state = SS_CONNECTED; | |
75606dc6 RB |
747 | |
748 | out_release: | |
1da177e4 LT |
749 | release_sock(sk); |
750 | ||
75606dc6 | 751 | return err; |
1da177e4 LT |
752 | } |
753 | ||
754 | static int nr_accept(struct socket *sock, struct socket *newsock, int flags) | |
755 | { | |
1da177e4 LT |
756 | struct sk_buff *skb; |
757 | struct sock *newsk; | |
75606dc6 | 758 | DEFINE_WAIT(wait); |
1da177e4 LT |
759 | struct sock *sk; |
760 | int err = 0; | |
761 | ||
762 | if ((sk = sock->sk) == NULL) | |
763 | return -EINVAL; | |
764 | ||
765 | lock_sock(sk); | |
766 | if (sk->sk_type != SOCK_SEQPACKET) { | |
767 | err = -EOPNOTSUPP; | |
75606dc6 | 768 | goto out_release; |
1da177e4 LT |
769 | } |
770 | ||
771 | if (sk->sk_state != TCP_LISTEN) { | |
772 | err = -EINVAL; | |
75606dc6 | 773 | goto out_release; |
1da177e4 LT |
774 | } |
775 | ||
776 | /* | |
777 | * The write queue this time is holding sockets ready to use | |
778 | * hooked into the SABM we saved | |
779 | */ | |
1da177e4 | 780 | for (;;) { |
75606dc6 | 781 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
782 | skb = skb_dequeue(&sk->sk_receive_queue); |
783 | if (skb) | |
784 | break; | |
785 | ||
1da177e4 | 786 | if (flags & O_NONBLOCK) { |
75606dc6 RB |
787 | err = -EWOULDBLOCK; |
788 | break; | |
1da177e4 | 789 | } |
75606dc6 RB |
790 | if (!signal_pending(current)) { |
791 | release_sock(sk); | |
1da177e4 LT |
792 | schedule(); |
793 | lock_sock(sk); | |
794 | continue; | |
795 | } | |
75606dc6 RB |
796 | err = -ERESTARTSYS; |
797 | break; | |
1da177e4 | 798 | } |
75606dc6 RB |
799 | finish_wait(sk->sk_sleep, &wait); |
800 | if (err) | |
801 | goto out_release; | |
1da177e4 LT |
802 | |
803 | newsk = skb->sk; | |
804 | newsk->sk_socket = newsock; | |
805 | newsk->sk_sleep = &newsock->wait; | |
806 | ||
807 | /* Now attach up the new socket */ | |
808 | kfree_skb(skb); | |
18601a7d | 809 | sk_acceptq_removed(sk); |
1da177e4 LT |
810 | newsock->sk = newsk; |
811 | ||
75606dc6 | 812 | out_release: |
1da177e4 | 813 | release_sock(sk); |
75606dc6 | 814 | |
1da177e4 LT |
815 | return err; |
816 | } | |
817 | ||
818 | static int nr_getname(struct socket *sock, struct sockaddr *uaddr, | |
819 | int *uaddr_len, int peer) | |
820 | { | |
821 | struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr; | |
822 | struct sock *sk = sock->sk; | |
823 | struct nr_sock *nr = nr_sk(sk); | |
824 | ||
825 | lock_sock(sk); | |
826 | if (peer != 0) { | |
827 | if (sk->sk_state != TCP_ESTABLISHED) { | |
828 | release_sock(sk); | |
829 | return -ENOTCONN; | |
830 | } | |
831 | sax->fsa_ax25.sax25_family = AF_NETROM; | |
832 | sax->fsa_ax25.sax25_ndigis = 1; | |
833 | sax->fsa_ax25.sax25_call = nr->user_addr; | |
834 | sax->fsa_digipeater[0] = nr->dest_addr; | |
835 | *uaddr_len = sizeof(struct full_sockaddr_ax25); | |
836 | } else { | |
837 | sax->fsa_ax25.sax25_family = AF_NETROM; | |
838 | sax->fsa_ax25.sax25_ndigis = 0; | |
839 | sax->fsa_ax25.sax25_call = nr->source_addr; | |
840 | *uaddr_len = sizeof(struct sockaddr_ax25); | |
841 | } | |
842 | release_sock(sk); | |
843 | ||
844 | return 0; | |
845 | } | |
846 | ||
847 | int nr_rx_frame(struct sk_buff *skb, struct net_device *dev) | |
848 | { | |
849 | struct sock *sk; | |
5f8f59d6 | 850 | struct sock *make; |
1da177e4 LT |
851 | struct nr_sock *nr_make; |
852 | ax25_address *src, *dest, *user; | |
853 | unsigned short circuit_index, circuit_id; | |
854 | unsigned short peer_circuit_index, peer_circuit_id; | |
855 | unsigned short frametype, flags, window, timeout; | |
856 | int ret; | |
857 | ||
858 | skb->sk = NULL; /* Initially we don't know who it's for */ | |
859 | ||
860 | /* | |
861 | * skb->data points to the netrom frame start | |
862 | */ | |
863 | ||
864 | src = (ax25_address *)(skb->data + 0); | |
865 | dest = (ax25_address *)(skb->data + 7); | |
866 | ||
867 | circuit_index = skb->data[15]; | |
868 | circuit_id = skb->data[16]; | |
869 | peer_circuit_index = skb->data[17]; | |
870 | peer_circuit_id = skb->data[18]; | |
871 | frametype = skb->data[19] & 0x0F; | |
872 | flags = skb->data[19] & 0xF0; | |
873 | ||
1da177e4 LT |
874 | /* |
875 | * Check for an incoming IP over NET/ROM frame. | |
876 | */ | |
98a82feb RB |
877 | if (frametype == NR_PROTOEXT && |
878 | circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) { | |
1da177e4 | 879 | skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN); |
badff6d0 | 880 | skb_reset_transport_header(skb); |
1da177e4 LT |
881 | |
882 | return nr_rx_ip(skb, dev); | |
883 | } | |
1da177e4 LT |
884 | |
885 | /* | |
886 | * Find an existing socket connection, based on circuit ID, if it's | |
887 | * a Connect Request base it on their circuit ID. | |
888 | * | |
889 | * Circuit ID 0/0 is not valid but it could still be a "reset" for a | |
890 | * circuit that no longer exists at the other end ... | |
891 | */ | |
892 | ||
893 | sk = NULL; | |
894 | ||
895 | if (circuit_index == 0 && circuit_id == 0) { | |
896 | if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG) | |
897 | sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src); | |
898 | } else { | |
899 | if (frametype == NR_CONNREQ) | |
900 | sk = nr_find_peer(circuit_index, circuit_id, src); | |
901 | else | |
902 | sk = nr_find_socket(circuit_index, circuit_id); | |
903 | } | |
904 | ||
905 | if (sk != NULL) { | |
badff6d0 | 906 | skb_reset_transport_header(skb); |
1da177e4 LT |
907 | |
908 | if (frametype == NR_CONNACK && skb->len == 22) | |
909 | nr_sk(sk)->bpqext = 1; | |
910 | else | |
911 | nr_sk(sk)->bpqext = 0; | |
912 | ||
913 | ret = nr_process_rx_frame(sk, skb); | |
914 | bh_unlock_sock(sk); | |
915 | return ret; | |
916 | } | |
917 | ||
918 | /* | |
919 | * Now it should be a CONNREQ. | |
920 | */ | |
921 | if (frametype != NR_CONNREQ) { | |
922 | /* | |
923 | * Here it would be nice to be able to send a reset but | |
e21ce8c7 RB |
924 | * NET/ROM doesn't have one. We've tried to extend the protocol |
925 | * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that | |
926 | * apparently kills BPQ boxes... :-( | |
927 | * So now we try to follow the established behaviour of | |
928 | * G8PZT's Xrouter which is sending packets with command type 7 | |
929 | * as an extension of the protocol. | |
1da177e4 | 930 | */ |
e21ce8c7 RB |
931 | if (sysctl_netrom_reset_circuit && |
932 | (frametype != NR_RESET || flags != 0)) | |
933 | nr_transmit_reset(skb, 1); | |
934 | ||
1da177e4 LT |
935 | return 0; |
936 | } | |
937 | ||
938 | sk = nr_find_listener(dest); | |
939 | ||
940 | user = (ax25_address *)(skb->data + 21); | |
941 | ||
942 | if (sk == NULL || sk_acceptq_is_full(sk) || | |
943 | (make = nr_make_new(sk)) == NULL) { | |
944 | nr_transmit_refusal(skb, 0); | |
945 | if (sk) | |
946 | bh_unlock_sock(sk); | |
947 | return 0; | |
948 | } | |
949 | ||
950 | window = skb->data[20]; | |
951 | ||
952 | skb->sk = make; | |
953 | make->sk_state = TCP_ESTABLISHED; | |
954 | ||
955 | /* Fill in his circuit details */ | |
956 | nr_make = nr_sk(make); | |
957 | nr_make->source_addr = *dest; | |
958 | nr_make->dest_addr = *src; | |
959 | nr_make->user_addr = *user; | |
960 | ||
961 | nr_make->your_index = circuit_index; | |
962 | nr_make->your_id = circuit_id; | |
963 | ||
964 | bh_unlock_sock(sk); | |
965 | circuit = nr_find_next_circuit(); | |
966 | bh_lock_sock(sk); | |
967 | ||
968 | nr_make->my_index = circuit / 256; | |
969 | nr_make->my_id = circuit % 256; | |
970 | ||
971 | circuit++; | |
972 | ||
973 | /* Window negotiation */ | |
974 | if (window < nr_make->window) | |
975 | nr_make->window = window; | |
976 | ||
977 | /* L4 timeout negotiation */ | |
978 | if (skb->len == 37) { | |
979 | timeout = skb->data[36] * 256 + skb->data[35]; | |
980 | if (timeout * HZ < nr_make->t1) | |
981 | nr_make->t1 = timeout * HZ; | |
982 | nr_make->bpqext = 1; | |
983 | } else { | |
984 | nr_make->bpqext = 0; | |
985 | } | |
986 | ||
987 | nr_write_internal(make, NR_CONNACK); | |
988 | ||
989 | nr_make->condition = 0x00; | |
990 | nr_make->vs = 0; | |
991 | nr_make->va = 0; | |
992 | nr_make->vr = 0; | |
993 | nr_make->vl = 0; | |
994 | nr_make->state = NR_STATE_3; | |
18601a7d | 995 | sk_acceptq_added(sk); |
1da177e4 LT |
996 | skb_queue_head(&sk->sk_receive_queue, skb); |
997 | ||
1da177e4 LT |
998 | if (!sock_flag(sk, SOCK_DEAD)) |
999 | sk->sk_data_ready(sk, skb->len); | |
1000 | ||
1001 | bh_unlock_sock(sk); | |
5cc29e3b RB |
1002 | |
1003 | nr_insert_socket(make); | |
1004 | ||
1005 | nr_start_heartbeat(make); | |
1006 | nr_start_idletimer(make); | |
1007 | ||
1da177e4 LT |
1008 | return 1; |
1009 | } | |
1010 | ||
1011 | static int nr_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1012 | struct msghdr *msg, size_t len) | |
1013 | { | |
1014 | struct sock *sk = sock->sk; | |
1015 | struct nr_sock *nr = nr_sk(sk); | |
1016 | struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name; | |
1017 | int err; | |
1018 | struct sockaddr_ax25 sax; | |
1019 | struct sk_buff *skb; | |
1020 | unsigned char *asmptr; | |
1021 | int size; | |
1022 | ||
1023 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) | |
1024 | return -EINVAL; | |
1025 | ||
1026 | lock_sock(sk); | |
1027 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
1028 | err = -EADDRNOTAVAIL; | |
1029 | goto out; | |
1030 | } | |
1031 | ||
1032 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1033 | send_sig(SIGPIPE, current, 0); | |
1034 | err = -EPIPE; | |
1035 | goto out; | |
1036 | } | |
1037 | ||
1038 | if (nr->device == NULL) { | |
1039 | err = -ENETUNREACH; | |
1040 | goto out; | |
1041 | } | |
1042 | ||
1043 | if (usax) { | |
1044 | if (msg->msg_namelen < sizeof(sax)) { | |
1045 | err = -EINVAL; | |
1046 | goto out; | |
1047 | } | |
1048 | sax = *usax; | |
1049 | if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) { | |
1050 | err = -EISCONN; | |
1051 | goto out; | |
1052 | } | |
1053 | if (sax.sax25_family != AF_NETROM) { | |
1054 | err = -EINVAL; | |
1055 | goto out; | |
1056 | } | |
1057 | } else { | |
1058 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1059 | err = -ENOTCONN; | |
1060 | goto out; | |
1061 | } | |
1062 | sax.sax25_family = AF_NETROM; | |
1063 | sax.sax25_call = nr->dest_addr; | |
1064 | } | |
1065 | ||
1066 | SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n"); | |
1067 | ||
1068 | /* Build a packet */ | |
1069 | SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n"); | |
1070 | size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN; | |
1071 | ||
1072 | if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) | |
1073 | goto out; | |
1074 | ||
1075 | skb_reserve(skb, size - len); | |
eeeb0374 | 1076 | skb_reset_transport_header(skb); |
1da177e4 LT |
1077 | |
1078 | /* | |
1079 | * Push down the NET/ROM header | |
1080 | */ | |
1081 | ||
1082 | asmptr = skb_push(skb, NR_TRANSPORT_LEN); | |
1083 | SOCK_DEBUG(sk, "Building NET/ROM Header.\n"); | |
1084 | ||
1085 | /* Build a NET/ROM Transport header */ | |
1086 | ||
1087 | *asmptr++ = nr->your_index; | |
1088 | *asmptr++ = nr->your_id; | |
1089 | *asmptr++ = 0; /* To be filled in later */ | |
1090 | *asmptr++ = 0; /* Ditto */ | |
1091 | *asmptr++ = NR_INFO; | |
1092 | SOCK_DEBUG(sk, "Built header.\n"); | |
1093 | ||
1094 | /* | |
1095 | * Put the data on the end | |
1096 | */ | |
eeeb0374 | 1097 | skb_put(skb, len); |
1da177e4 | 1098 | |
1da177e4 LT |
1099 | SOCK_DEBUG(sk, "NET/ROM: Appending user data\n"); |
1100 | ||
1101 | /* User data follows immediately after the NET/ROM transport header */ | |
eeeb0374 | 1102 | if (memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len)) { |
1da177e4 LT |
1103 | kfree_skb(skb); |
1104 | err = -EFAULT; | |
1105 | goto out; | |
1106 | } | |
1107 | ||
1108 | SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n"); | |
1109 | ||
1110 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1111 | kfree_skb(skb); | |
1112 | err = -ENOTCONN; | |
1113 | goto out; | |
1114 | } | |
1115 | ||
1116 | nr_output(sk, skb); /* Shove it onto the queue */ | |
1117 | ||
1118 | err = len; | |
1119 | out: | |
1120 | release_sock(sk); | |
1121 | return err; | |
1122 | } | |
1123 | ||
1124 | static int nr_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1125 | struct msghdr *msg, size_t size, int flags) | |
1126 | { | |
1127 | struct sock *sk = sock->sk; | |
1128 | struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name; | |
1129 | size_t copied; | |
1130 | struct sk_buff *skb; | |
1131 | int er; | |
1132 | ||
1133 | /* | |
1134 | * This works for seqpacket too. The receiver has ordered the queue for | |
1135 | * us! We do one quick check first though | |
1136 | */ | |
1137 | ||
1138 | lock_sock(sk); | |
1139 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1140 | release_sock(sk); | |
1141 | return -ENOTCONN; | |
1142 | } | |
1143 | ||
1144 | /* Now we can treat all alike */ | |
1145 | if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) { | |
1146 | release_sock(sk); | |
1147 | return er; | |
1148 | } | |
1149 | ||
badff6d0 | 1150 | skb_reset_transport_header(skb); |
1da177e4 LT |
1151 | copied = skb->len; |
1152 | ||
1153 | if (copied > size) { | |
1154 | copied = size; | |
1155 | msg->msg_flags |= MSG_TRUNC; | |
1156 | } | |
1157 | ||
1158 | skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
1159 | ||
1160 | if (sax != NULL) { | |
1161 | sax->sax25_family = AF_NETROM; | |
d626f62b ACM |
1162 | skb_copy_from_linear_data_offset(skb, 7, sax->sax25_call.ax25_call, |
1163 | AX25_ADDR_LEN); | |
1da177e4 LT |
1164 | } |
1165 | ||
1166 | msg->msg_namelen = sizeof(*sax); | |
1167 | ||
1168 | skb_free_datagram(sk, skb); | |
1169 | ||
1170 | release_sock(sk); | |
1171 | return copied; | |
1172 | } | |
1173 | ||
1174 | ||
1175 | static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1176 | { | |
1177 | struct sock *sk = sock->sk; | |
1178 | void __user *argp = (void __user *)arg; | |
1179 | int ret; | |
1180 | ||
1da177e4 LT |
1181 | switch (cmd) { |
1182 | case TIOCOUTQ: { | |
1183 | long amount; | |
5ff7630e CH |
1184 | |
1185 | lock_sock(sk); | |
1da177e4 LT |
1186 | amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); |
1187 | if (amount < 0) | |
1188 | amount = 0; | |
1189 | release_sock(sk); | |
1190 | return put_user(amount, (int __user *)argp); | |
1191 | } | |
1192 | ||
1193 | case TIOCINQ: { | |
1194 | struct sk_buff *skb; | |
1195 | long amount = 0L; | |
5ff7630e CH |
1196 | |
1197 | lock_sock(sk); | |
1da177e4 LT |
1198 | /* These two are safe on a single CPU system as only user tasks fiddle here */ |
1199 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) | |
1200 | amount = skb->len; | |
1201 | release_sock(sk); | |
1202 | return put_user(amount, (int __user *)argp); | |
1203 | } | |
1204 | ||
1205 | case SIOCGSTAMP: | |
5ff7630e | 1206 | lock_sock(sk); |
9b37ee75 | 1207 | ret = sock_get_timestamp(sk, argp); |
1da177e4 LT |
1208 | release_sock(sk); |
1209 | return ret; | |
1210 | ||
ae40eb1e ED |
1211 | case SIOCGSTAMPNS: |
1212 | lock_sock(sk); | |
1213 | ret = sock_get_timestampns(sk, argp); | |
1214 | release_sock(sk); | |
1215 | return ret; | |
1216 | ||
1da177e4 LT |
1217 | case SIOCGIFADDR: |
1218 | case SIOCSIFADDR: | |
1219 | case SIOCGIFDSTADDR: | |
1220 | case SIOCSIFDSTADDR: | |
1221 | case SIOCGIFBRDADDR: | |
1222 | case SIOCSIFBRDADDR: | |
1223 | case SIOCGIFNETMASK: | |
1224 | case SIOCSIFNETMASK: | |
1225 | case SIOCGIFMETRIC: | |
1226 | case SIOCSIFMETRIC: | |
1da177e4 LT |
1227 | return -EINVAL; |
1228 | ||
1229 | case SIOCADDRT: | |
1230 | case SIOCDELRT: | |
1231 | case SIOCNRDECOBS: | |
1da177e4 LT |
1232 | if (!capable(CAP_NET_ADMIN)) return -EPERM; |
1233 | return nr_rt_ioctl(cmd, argp); | |
1234 | ||
1235 | default: | |
b5e5fa5e | 1236 | return -ENOIOCTLCMD; |
1da177e4 | 1237 | } |
1da177e4 LT |
1238 | |
1239 | return 0; | |
1240 | } | |
1241 | ||
1242 | #ifdef CONFIG_PROC_FS | |
1243 | ||
1244 | static void *nr_info_start(struct seq_file *seq, loff_t *pos) | |
1245 | { | |
1246 | struct sock *s; | |
1247 | struct hlist_node *node; | |
1248 | int i = 1; | |
1249 | ||
1250 | spin_lock_bh(&nr_list_lock); | |
1251 | if (*pos == 0) | |
1252 | return SEQ_START_TOKEN; | |
1253 | ||
1254 | sk_for_each(s, node, &nr_list) { | |
1255 | if (i == *pos) | |
1256 | return s; | |
1257 | ++i; | |
1258 | } | |
1259 | return NULL; | |
1260 | } | |
1261 | ||
1262 | static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos) | |
1263 | { | |
1264 | ++*pos; | |
1265 | ||
5f8f59d6 | 1266 | return (v == SEQ_START_TOKEN) ? sk_head(&nr_list) |
1da177e4 LT |
1267 | : sk_next((struct sock *)v); |
1268 | } | |
5f8f59d6 | 1269 | |
1da177e4 LT |
1270 | static void nr_info_stop(struct seq_file *seq, void *v) |
1271 | { | |
1272 | spin_unlock_bh(&nr_list_lock); | |
1273 | } | |
1274 | ||
1275 | static int nr_info_show(struct seq_file *seq, void *v) | |
1276 | { | |
1277 | struct sock *s = v; | |
1278 | struct net_device *dev; | |
1279 | struct nr_sock *nr; | |
1280 | const char *devname; | |
f75268cd | 1281 | char buf[11]; |
1da177e4 LT |
1282 | |
1283 | if (v == SEQ_START_TOKEN) | |
1284 | seq_puts(seq, | |
1285 | "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"); | |
1286 | ||
1287 | else { | |
1288 | ||
1289 | bh_lock_sock(s); | |
1290 | nr = nr_sk(s); | |
1291 | ||
1292 | if ((dev = nr->device) == NULL) | |
1293 | devname = "???"; | |
1294 | else | |
1295 | devname = dev->name; | |
1296 | ||
f75268cd RB |
1297 | seq_printf(seq, "%-9s ", ax2asc(buf, &nr->user_addr)); |
1298 | seq_printf(seq, "%-9s ", ax2asc(buf, &nr->dest_addr)); | |
5f8f59d6 | 1299 | seq_printf(seq, |
1da177e4 | 1300 | "%-9s %-3s %02X/%02X %02X/%02X %2d %3d %3d %3d %3lu/%03lu %2lu/%02lu %3lu/%03lu %3lu/%03lu %2d/%02d %3d %5d %5d %ld\n", |
f75268cd | 1301 | ax2asc(buf, &nr->source_addr), |
1da177e4 LT |
1302 | devname, |
1303 | nr->my_index, | |
1304 | nr->my_id, | |
1305 | nr->your_index, | |
1306 | nr->your_id, | |
1307 | nr->state, | |
1308 | nr->vs, | |
1309 | nr->vr, | |
1310 | nr->va, | |
1311 | ax25_display_timer(&nr->t1timer) / HZ, | |
1312 | nr->t1 / HZ, | |
1313 | ax25_display_timer(&nr->t2timer) / HZ, | |
1314 | nr->t2 / HZ, | |
1315 | ax25_display_timer(&nr->t4timer) / HZ, | |
1316 | nr->t4 / HZ, | |
1317 | ax25_display_timer(&nr->idletimer) / (60 * HZ), | |
1318 | nr->idle / (60 * HZ), | |
1319 | nr->n2count, | |
1320 | nr->n2, | |
1321 | nr->window, | |
1322 | atomic_read(&s->sk_wmem_alloc), | |
1323 | atomic_read(&s->sk_rmem_alloc), | |
1324 | s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); | |
1325 | ||
1326 | bh_unlock_sock(s); | |
1327 | } | |
1328 | return 0; | |
1329 | } | |
1330 | ||
56b3d975 | 1331 | static const struct seq_operations nr_info_seqops = { |
1da177e4 LT |
1332 | .start = nr_info_start, |
1333 | .next = nr_info_next, | |
1334 | .stop = nr_info_stop, | |
1335 | .show = nr_info_show, | |
1336 | }; | |
5f8f59d6 | 1337 | |
1da177e4 LT |
1338 | static int nr_info_open(struct inode *inode, struct file *file) |
1339 | { | |
1340 | return seq_open(file, &nr_info_seqops); | |
1341 | } | |
5f8f59d6 | 1342 | |
da7071d7 | 1343 | static const struct file_operations nr_info_fops = { |
1da177e4 LT |
1344 | .owner = THIS_MODULE, |
1345 | .open = nr_info_open, | |
1346 | .read = seq_read, | |
1347 | .llseek = seq_lseek, | |
1348 | .release = seq_release, | |
1349 | }; | |
1350 | #endif /* CONFIG_PROC_FS */ | |
1351 | ||
1352 | static struct net_proto_family nr_family_ops = { | |
1353 | .family = PF_NETROM, | |
1354 | .create = nr_create, | |
1355 | .owner = THIS_MODULE, | |
1356 | }; | |
1357 | ||
90ddc4f0 | 1358 | static const struct proto_ops nr_proto_ops = { |
1da177e4 LT |
1359 | .family = PF_NETROM, |
1360 | .owner = THIS_MODULE, | |
1361 | .release = nr_release, | |
1362 | .bind = nr_bind, | |
1363 | .connect = nr_connect, | |
1364 | .socketpair = sock_no_socketpair, | |
1365 | .accept = nr_accept, | |
1366 | .getname = nr_getname, | |
1367 | .poll = datagram_poll, | |
1368 | .ioctl = nr_ioctl, | |
1369 | .listen = nr_listen, | |
1370 | .shutdown = sock_no_shutdown, | |
1371 | .setsockopt = nr_setsockopt, | |
1372 | .getsockopt = nr_getsockopt, | |
1373 | .sendmsg = nr_sendmsg, | |
1374 | .recvmsg = nr_recvmsg, | |
1375 | .mmap = sock_no_mmap, | |
1376 | .sendpage = sock_no_sendpage, | |
1377 | }; | |
1378 | ||
1379 | static struct notifier_block nr_dev_notifier = { | |
1380 | .notifier_call = nr_device_event, | |
1381 | }; | |
1382 | ||
1383 | static struct net_device **dev_nr; | |
1384 | ||
8d5cf596 RB |
1385 | static struct ax25_protocol nr_pid = { |
1386 | .pid = AX25_P_NETROM, | |
1387 | .func = nr_route_frame | |
1388 | }; | |
1389 | ||
a4282717 RB |
1390 | static struct ax25_linkfail nr_linkfail_notifier = { |
1391 | .func = nr_link_failed, | |
1392 | }; | |
1393 | ||
1da177e4 LT |
1394 | static int __init nr_proto_init(void) |
1395 | { | |
1396 | int i; | |
1397 | int rc = proto_register(&nr_proto, 0); | |
1398 | ||
1399 | if (rc != 0) | |
1400 | goto out; | |
1401 | ||
1402 | if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) { | |
1403 | printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n"); | |
1404 | return -1; | |
1405 | } | |
1406 | ||
1b30dd35 | 1407 | dev_nr = kzalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL); |
1da177e4 LT |
1408 | if (dev_nr == NULL) { |
1409 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n"); | |
1410 | return -1; | |
1411 | } | |
1412 | ||
1da177e4 LT |
1413 | for (i = 0; i < nr_ndevs; i++) { |
1414 | char name[IFNAMSIZ]; | |
1415 | struct net_device *dev; | |
1416 | ||
1417 | sprintf(name, "nr%d", i); | |
b88a762b | 1418 | dev = alloc_netdev(sizeof(struct nr_private), name, nr_setup); |
1da177e4 LT |
1419 | if (!dev) { |
1420 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n"); | |
1421 | goto fail; | |
1422 | } | |
5f8f59d6 | 1423 | |
1da177e4 LT |
1424 | dev->base_addr = i; |
1425 | if (register_netdev(dev)) { | |
1426 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n"); | |
1427 | free_netdev(dev); | |
1428 | goto fail; | |
1429 | } | |
4b260a98 | 1430 | lockdep_set_class(&dev->_xmit_lock, &nr_netdev_xmit_lock_key); |
1da177e4 LT |
1431 | dev_nr[i] = dev; |
1432 | } | |
1433 | ||
1434 | if (sock_register(&nr_family_ops)) { | |
1435 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n"); | |
1436 | goto fail; | |
1437 | } | |
5f8f59d6 | 1438 | |
1da177e4 | 1439 | register_netdevice_notifier(&nr_dev_notifier); |
1da177e4 | 1440 | |
8d5cf596 | 1441 | ax25_register_pid(&nr_pid); |
a4282717 | 1442 | ax25_linkfail_register(&nr_linkfail_notifier); |
1da177e4 LT |
1443 | |
1444 | #ifdef CONFIG_SYSCTL | |
1445 | nr_register_sysctl(); | |
1446 | #endif | |
1447 | ||
1448 | nr_loopback_init(); | |
1449 | ||
1450 | proc_net_fops_create("nr", S_IRUGO, &nr_info_fops); | |
1451 | proc_net_fops_create("nr_neigh", S_IRUGO, &nr_neigh_fops); | |
1452 | proc_net_fops_create("nr_nodes", S_IRUGO, &nr_nodes_fops); | |
1453 | out: | |
1454 | return rc; | |
1455 | fail: | |
1456 | while (--i >= 0) { | |
1457 | unregister_netdev(dev_nr[i]); | |
1458 | free_netdev(dev_nr[i]); | |
1459 | } | |
1460 | kfree(dev_nr); | |
1461 | proto_unregister(&nr_proto); | |
1462 | rc = -1; | |
1463 | goto out; | |
1464 | } | |
1465 | ||
1466 | module_init(nr_proto_init); | |
1467 | ||
1468 | module_param(nr_ndevs, int, 0); | |
1469 | MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices"); | |
1470 | ||
1471 | MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); | |
1472 | MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol"); | |
1473 | MODULE_LICENSE("GPL"); | |
1474 | MODULE_ALIAS_NETPROTO(PF_NETROM); | |
1475 | ||
1476 | static void __exit nr_exit(void) | |
1477 | { | |
1478 | int i; | |
1479 | ||
1480 | proc_net_remove("nr"); | |
1481 | proc_net_remove("nr_neigh"); | |
1482 | proc_net_remove("nr_nodes"); | |
1483 | nr_loopback_clear(); | |
1484 | ||
1485 | nr_rt_free(); | |
1486 | ||
1487 | #ifdef CONFIG_SYSCTL | |
1488 | nr_unregister_sysctl(); | |
1489 | #endif | |
1490 | ||
a4282717 | 1491 | ax25_linkfail_release(&nr_linkfail_notifier); |
1da177e4 LT |
1492 | ax25_protocol_release(AX25_P_NETROM); |
1493 | ||
1494 | unregister_netdevice_notifier(&nr_dev_notifier); | |
1495 | ||
1496 | sock_unregister(PF_NETROM); | |
1497 | ||
1498 | for (i = 0; i < nr_ndevs; i++) { | |
1499 | struct net_device *dev = dev_nr[i]; | |
1500 | if (dev) { | |
1501 | unregister_netdev(dev); | |
1502 | free_netdev(dev); | |
1503 | } | |
1504 | } | |
1505 | ||
1506 | kfree(dev_nr); | |
1507 | proto_unregister(&nr_proto); | |
1508 | } | |
1509 | module_exit(nr_exit); |