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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> | |
457c4cbc | 30 | #include <net/net_namespace.h> |
1da177e4 LT |
31 | #include <net/sock.h> |
32 | #include <asm/uaccess.h> | |
33 | #include <asm/system.h> | |
34 | #include <linux/fcntl.h> | |
35 | #include <linux/termios.h> /* For TIOCINQ/OUTQ */ | |
36 | #include <linux/mm.h> | |
37 | #include <linux/interrupt.h> | |
38 | #include <linux/notifier.h> | |
39 | #include <net/netrom.h> | |
40 | #include <linux/proc_fs.h> | |
41 | #include <linux/seq_file.h> | |
42 | #include <net/ip.h> | |
c752f073 | 43 | #include <net/tcp_states.h> |
1da177e4 LT |
44 | #include <net/arp.h> |
45 | #include <linux/init.h> | |
46 | ||
47 | static int nr_ndevs = 4; | |
48 | ||
49 | int sysctl_netrom_default_path_quality = NR_DEFAULT_QUAL; | |
50 | int sysctl_netrom_obsolescence_count_initialiser = NR_DEFAULT_OBS; | |
51 | int sysctl_netrom_network_ttl_initialiser = NR_DEFAULT_TTL; | |
52 | int sysctl_netrom_transport_timeout = NR_DEFAULT_T1; | |
53 | int sysctl_netrom_transport_maximum_tries = NR_DEFAULT_N2; | |
54 | int sysctl_netrom_transport_acknowledge_delay = NR_DEFAULT_T2; | |
55 | int sysctl_netrom_transport_busy_delay = NR_DEFAULT_T4; | |
56 | int sysctl_netrom_transport_requested_window_size = NR_DEFAULT_WINDOW; | |
57 | int sysctl_netrom_transport_no_activity_timeout = NR_DEFAULT_IDLE; | |
58 | int sysctl_netrom_routing_control = NR_DEFAULT_ROUTING; | |
59 | int sysctl_netrom_link_fails_count = NR_DEFAULT_FAILS; | |
e21ce8c7 | 60 | int sysctl_netrom_reset_circuit = NR_DEFAULT_RESET; |
1da177e4 LT |
61 | |
62 | static unsigned short circuit = 0x101; | |
63 | ||
64 | static HLIST_HEAD(nr_list); | |
65 | static DEFINE_SPINLOCK(nr_list_lock); | |
66 | ||
90ddc4f0 | 67 | static const struct proto_ops nr_proto_ops; |
1da177e4 | 68 | |
4b260a98 RB |
69 | /* |
70 | * NETROM network devices are virtual network devices encapsulating NETROM | |
71 | * frames into AX.25 which will be sent through an AX.25 device, so form a | |
72 | * special "super class" of normal net devices; split their locks off into a | |
73 | * separate class since they always nest. | |
74 | */ | |
75 | static struct lock_class_key nr_netdev_xmit_lock_key; | |
76 | ||
1da177e4 LT |
77 | /* |
78 | * Socket removal during an interrupt is now safe. | |
79 | */ | |
80 | static void nr_remove_socket(struct sock *sk) | |
81 | { | |
82 | spin_lock_bh(&nr_list_lock); | |
83 | sk_del_node_init(sk); | |
84 | spin_unlock_bh(&nr_list_lock); | |
85 | } | |
86 | ||
87 | /* | |
88 | * Kill all bound sockets on a dropped device. | |
89 | */ | |
90 | static void nr_kill_by_device(struct net_device *dev) | |
91 | { | |
92 | struct sock *s; | |
93 | struct hlist_node *node; | |
94 | ||
95 | spin_lock_bh(&nr_list_lock); | |
96 | sk_for_each(s, node, &nr_list) | |
97 | if (nr_sk(s)->device == dev) | |
98 | nr_disconnect(s, ENETUNREACH); | |
99 | spin_unlock_bh(&nr_list_lock); | |
100 | } | |
101 | ||
102 | /* | |
103 | * Handle device status changes. | |
104 | */ | |
105 | static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr) | |
106 | { | |
107 | struct net_device *dev = (struct net_device *)ptr; | |
108 | ||
109 | if (event != NETDEV_DOWN) | |
110 | return NOTIFY_DONE; | |
111 | ||
112 | nr_kill_by_device(dev); | |
113 | nr_rt_device_down(dev); | |
5f8f59d6 | 114 | |
1da177e4 LT |
115 | return NOTIFY_DONE; |
116 | } | |
117 | ||
118 | /* | |
119 | * Add a socket to the bound sockets list. | |
120 | */ | |
121 | static void nr_insert_socket(struct sock *sk) | |
122 | { | |
123 | spin_lock_bh(&nr_list_lock); | |
124 | sk_add_node(sk, &nr_list); | |
125 | spin_unlock_bh(&nr_list_lock); | |
126 | } | |
127 | ||
128 | /* | |
129 | * Find a socket that wants to accept the Connect Request we just | |
130 | * received. | |
131 | */ | |
132 | static struct sock *nr_find_listener(ax25_address *addr) | |
133 | { | |
134 | struct sock *s; | |
135 | struct hlist_node *node; | |
136 | ||
137 | spin_lock_bh(&nr_list_lock); | |
138 | sk_for_each(s, node, &nr_list) | |
139 | if (!ax25cmp(&nr_sk(s)->source_addr, addr) && | |
140 | s->sk_state == TCP_LISTEN) { | |
5f8f59d6 | 141 | bh_lock_sock(s); |
1da177e4 LT |
142 | goto found; |
143 | } | |
144 | s = NULL; | |
145 | found: | |
146 | spin_unlock_bh(&nr_list_lock); | |
147 | return s; | |
148 | } | |
149 | ||
150 | /* | |
151 | * Find a connected NET/ROM socket given my circuit IDs. | |
152 | */ | |
153 | static struct sock *nr_find_socket(unsigned char index, unsigned char id) | |
154 | { | |
155 | struct sock *s; | |
156 | struct hlist_node *node; | |
157 | ||
158 | spin_lock_bh(&nr_list_lock); | |
159 | sk_for_each(s, node, &nr_list) { | |
160 | struct nr_sock *nr = nr_sk(s); | |
5f8f59d6 | 161 | |
1da177e4 LT |
162 | if (nr->my_index == index && nr->my_id == id) { |
163 | bh_lock_sock(s); | |
164 | goto found; | |
165 | } | |
166 | } | |
167 | s = NULL; | |
168 | found: | |
169 | spin_unlock_bh(&nr_list_lock); | |
170 | return s; | |
171 | } | |
172 | ||
173 | /* | |
174 | * Find a connected NET/ROM socket given their circuit IDs. | |
175 | */ | |
176 | static struct sock *nr_find_peer(unsigned char index, unsigned char id, | |
177 | ax25_address *dest) | |
178 | { | |
179 | struct sock *s; | |
180 | struct hlist_node *node; | |
181 | ||
182 | spin_lock_bh(&nr_list_lock); | |
183 | sk_for_each(s, node, &nr_list) { | |
184 | struct nr_sock *nr = nr_sk(s); | |
5f8f59d6 | 185 | |
1da177e4 LT |
186 | if (nr->your_index == index && nr->your_id == id && |
187 | !ax25cmp(&nr->dest_addr, dest)) { | |
5f8f59d6 | 188 | bh_lock_sock(s); |
1da177e4 LT |
189 | goto found; |
190 | } | |
191 | } | |
192 | s = NULL; | |
193 | found: | |
194 | spin_unlock_bh(&nr_list_lock); | |
195 | return s; | |
196 | } | |
197 | ||
198 | /* | |
199 | * Find next free circuit ID. | |
200 | */ | |
201 | static unsigned short nr_find_next_circuit(void) | |
202 | { | |
203 | unsigned short id = circuit; | |
204 | unsigned char i, j; | |
205 | struct sock *sk; | |
206 | ||
207 | for (;;) { | |
208 | i = id / 256; | |
209 | j = id % 256; | |
210 | ||
211 | if (i != 0 && j != 0) { | |
212 | if ((sk=nr_find_socket(i, j)) == NULL) | |
213 | break; | |
214 | bh_unlock_sock(sk); | |
215 | } | |
216 | ||
217 | id++; | |
218 | } | |
219 | ||
220 | return id; | |
221 | } | |
222 | ||
223 | /* | |
224 | * Deferred destroy. | |
225 | */ | |
226 | void nr_destroy_socket(struct sock *); | |
227 | ||
228 | /* | |
229 | * Handler for deferred kills. | |
230 | */ | |
231 | static void nr_destroy_timer(unsigned long data) | |
232 | { | |
233 | struct sock *sk=(struct sock *)data; | |
234 | bh_lock_sock(sk); | |
235 | sock_hold(sk); | |
236 | nr_destroy_socket(sk); | |
237 | bh_unlock_sock(sk); | |
238 | sock_put(sk); | |
239 | } | |
240 | ||
241 | /* | |
242 | * This is called from user mode and the timers. Thus it protects itself | |
243 | * against interrupt users but doesn't worry about being called during | |
244 | * work. Once it is removed from the queue no interrupt or bottom half | |
245 | * will touch it and we are (fairly 8-) ) safe. | |
246 | */ | |
247 | void nr_destroy_socket(struct sock *sk) | |
248 | { | |
249 | struct sk_buff *skb; | |
250 | ||
251 | nr_remove_socket(sk); | |
252 | ||
253 | nr_stop_heartbeat(sk); | |
254 | nr_stop_t1timer(sk); | |
255 | nr_stop_t2timer(sk); | |
256 | nr_stop_t4timer(sk); | |
257 | nr_stop_idletimer(sk); | |
258 | ||
259 | nr_clear_queues(sk); /* Flush the queues */ | |
260 | ||
261 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
262 | if (skb->sk != sk) { /* A pending connection */ | |
263 | /* Queue the unaccepted socket for death */ | |
264 | sock_set_flag(skb->sk, SOCK_DEAD); | |
265 | nr_start_heartbeat(skb->sk); | |
266 | nr_sk(skb->sk)->state = NR_STATE_0; | |
267 | } | |
268 | ||
269 | kfree_skb(skb); | |
270 | } | |
271 | ||
272 | if (atomic_read(&sk->sk_wmem_alloc) || | |
273 | atomic_read(&sk->sk_rmem_alloc)) { | |
274 | /* Defer: outstanding buffers */ | |
275 | sk->sk_timer.function = nr_destroy_timer; | |
276 | sk->sk_timer.expires = jiffies + 2 * HZ; | |
277 | add_timer(&sk->sk_timer); | |
278 | } else | |
279 | sock_put(sk); | |
280 | } | |
281 | ||
282 | /* | |
283 | * Handling for system calls applied via the various interfaces to a | |
284 | * NET/ROM socket object. | |
285 | */ | |
286 | ||
287 | static int nr_setsockopt(struct socket *sock, int level, int optname, | |
288 | char __user *optval, int optlen) | |
289 | { | |
290 | struct sock *sk = sock->sk; | |
291 | struct nr_sock *nr = nr_sk(sk); | |
292 | int opt; | |
293 | ||
294 | if (level != SOL_NETROM) | |
295 | return -ENOPROTOOPT; | |
296 | ||
297 | if (optlen < sizeof(int)) | |
298 | return -EINVAL; | |
299 | ||
300 | if (get_user(opt, (int __user *)optval)) | |
301 | return -EFAULT; | |
302 | ||
303 | switch (optname) { | |
304 | case NETROM_T1: | |
305 | if (opt < 1) | |
306 | return -EINVAL; | |
307 | nr->t1 = opt * HZ; | |
308 | return 0; | |
309 | ||
310 | case NETROM_T2: | |
311 | if (opt < 1) | |
312 | return -EINVAL; | |
313 | nr->t2 = opt * HZ; | |
314 | return 0; | |
315 | ||
316 | case NETROM_N2: | |
317 | if (opt < 1 || opt > 31) | |
318 | return -EINVAL; | |
319 | nr->n2 = opt; | |
320 | return 0; | |
321 | ||
322 | case NETROM_T4: | |
323 | if (opt < 1) | |
324 | return -EINVAL; | |
325 | nr->t4 = opt * HZ; | |
326 | return 0; | |
327 | ||
328 | case NETROM_IDLE: | |
329 | if (opt < 0) | |
330 | return -EINVAL; | |
331 | nr->idle = opt * 60 * HZ; | |
332 | return 0; | |
333 | ||
334 | default: | |
335 | return -ENOPROTOOPT; | |
336 | } | |
337 | } | |
338 | ||
339 | static int nr_getsockopt(struct socket *sock, int level, int optname, | |
340 | char __user *optval, int __user *optlen) | |
341 | { | |
342 | struct sock *sk = sock->sk; | |
343 | struct nr_sock *nr = nr_sk(sk); | |
344 | int val = 0; | |
5f8f59d6 | 345 | int len; |
1da177e4 LT |
346 | |
347 | if (level != SOL_NETROM) | |
348 | return -ENOPROTOOPT; | |
5f8f59d6 | 349 | |
1da177e4 LT |
350 | if (get_user(len, optlen)) |
351 | return -EFAULT; | |
352 | ||
353 | if (len < 0) | |
354 | return -EINVAL; | |
5f8f59d6 | 355 | |
1da177e4 LT |
356 | switch (optname) { |
357 | case NETROM_T1: | |
358 | val = nr->t1 / HZ; | |
359 | break; | |
360 | ||
361 | case NETROM_T2: | |
362 | val = nr->t2 / HZ; | |
363 | break; | |
364 | ||
365 | case NETROM_N2: | |
366 | val = nr->n2; | |
367 | break; | |
368 | ||
369 | case NETROM_T4: | |
370 | val = nr->t4 / HZ; | |
371 | break; | |
372 | ||
373 | case NETROM_IDLE: | |
374 | val = nr->idle / (60 * HZ); | |
375 | break; | |
376 | ||
377 | default: | |
378 | return -ENOPROTOOPT; | |
379 | } | |
380 | ||
381 | len = min_t(unsigned int, len, sizeof(int)); | |
382 | ||
383 | if (put_user(len, optlen)) | |
384 | return -EFAULT; | |
385 | ||
386 | return copy_to_user(optval, &val, len) ? -EFAULT : 0; | |
387 | } | |
388 | ||
389 | static int nr_listen(struct socket *sock, int backlog) | |
390 | { | |
391 | struct sock *sk = sock->sk; | |
392 | ||
393 | lock_sock(sk); | |
394 | if (sk->sk_state != TCP_LISTEN) { | |
395 | memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN); | |
396 | sk->sk_max_ack_backlog = backlog; | |
397 | sk->sk_state = TCP_LISTEN; | |
398 | release_sock(sk); | |
399 | return 0; | |
400 | } | |
401 | release_sock(sk); | |
402 | ||
403 | return -EOPNOTSUPP; | |
404 | } | |
405 | ||
406 | static struct proto nr_proto = { | |
407 | .name = "NETROM", | |
408 | .owner = THIS_MODULE, | |
409 | .obj_size = sizeof(struct nr_sock), | |
410 | }; | |
411 | ||
412 | static int nr_create(struct socket *sock, int protocol) | |
413 | { | |
414 | struct sock *sk; | |
415 | struct nr_sock *nr; | |
416 | ||
417 | if (sock->type != SOCK_SEQPACKET || protocol != 0) | |
418 | return -ESOCKTNOSUPPORT; | |
419 | ||
420 | if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, &nr_proto, 1)) == NULL) | |
421 | return -ENOMEM; | |
422 | ||
423 | nr = nr_sk(sk); | |
424 | ||
425 | sock_init_data(sock, sk); | |
426 | ||
427 | sock->ops = &nr_proto_ops; | |
428 | sk->sk_protocol = protocol; | |
429 | ||
430 | skb_queue_head_init(&nr->ack_queue); | |
431 | skb_queue_head_init(&nr->reseq_queue); | |
432 | skb_queue_head_init(&nr->frag_queue); | |
433 | ||
434 | nr_init_timers(sk); | |
435 | ||
4d8937d0 RB |
436 | nr->t1 = |
437 | msecs_to_jiffies(sysctl_netrom_transport_timeout); | |
438 | nr->t2 = | |
439 | msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay); | |
440 | nr->n2 = | |
441 | msecs_to_jiffies(sysctl_netrom_transport_maximum_tries); | |
442 | nr->t4 = | |
443 | msecs_to_jiffies(sysctl_netrom_transport_busy_delay); | |
444 | nr->idle = | |
445 | msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout); | |
1da177e4 LT |
446 | nr->window = sysctl_netrom_transport_requested_window_size; |
447 | ||
448 | nr->bpqext = 1; | |
449 | nr->state = NR_STATE_0; | |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
454 | static struct sock *nr_make_new(struct sock *osk) | |
455 | { | |
456 | struct sock *sk; | |
457 | struct nr_sock *nr, *onr; | |
458 | ||
459 | if (osk->sk_type != SOCK_SEQPACKET) | |
460 | return NULL; | |
461 | ||
462 | if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, osk->sk_prot, 1)) == NULL) | |
463 | return NULL; | |
464 | ||
465 | nr = nr_sk(sk); | |
466 | ||
467 | sock_init_data(NULL, sk); | |
468 | ||
469 | sk->sk_type = osk->sk_type; | |
470 | sk->sk_socket = osk->sk_socket; | |
471 | sk->sk_priority = osk->sk_priority; | |
472 | sk->sk_protocol = osk->sk_protocol; | |
473 | sk->sk_rcvbuf = osk->sk_rcvbuf; | |
474 | sk->sk_sndbuf = osk->sk_sndbuf; | |
475 | sk->sk_state = TCP_ESTABLISHED; | |
476 | sk->sk_sleep = osk->sk_sleep; | |
53b924b3 | 477 | sock_copy_flags(sk, osk); |
1da177e4 LT |
478 | |
479 | skb_queue_head_init(&nr->ack_queue); | |
480 | skb_queue_head_init(&nr->reseq_queue); | |
481 | skb_queue_head_init(&nr->frag_queue); | |
482 | ||
483 | nr_init_timers(sk); | |
484 | ||
485 | onr = nr_sk(osk); | |
486 | ||
487 | nr->t1 = onr->t1; | |
488 | nr->t2 = onr->t2; | |
489 | nr->n2 = onr->n2; | |
490 | nr->t4 = onr->t4; | |
491 | nr->idle = onr->idle; | |
492 | nr->window = onr->window; | |
493 | ||
494 | nr->device = onr->device; | |
495 | nr->bpqext = onr->bpqext; | |
496 | ||
497 | return sk; | |
498 | } | |
499 | ||
500 | static int nr_release(struct socket *sock) | |
501 | { | |
502 | struct sock *sk = sock->sk; | |
503 | struct nr_sock *nr; | |
504 | ||
505 | if (sk == NULL) return 0; | |
506 | ||
507 | sock_hold(sk); | |
508 | lock_sock(sk); | |
509 | nr = nr_sk(sk); | |
510 | ||
511 | switch (nr->state) { | |
512 | case NR_STATE_0: | |
513 | case NR_STATE_1: | |
514 | case NR_STATE_2: | |
515 | nr_disconnect(sk, 0); | |
516 | nr_destroy_socket(sk); | |
517 | break; | |
518 | ||
519 | case NR_STATE_3: | |
520 | nr_clear_queues(sk); | |
521 | nr->n2count = 0; | |
522 | nr_write_internal(sk, NR_DISCREQ); | |
523 | nr_start_t1timer(sk); | |
524 | nr_stop_t2timer(sk); | |
525 | nr_stop_t4timer(sk); | |
526 | nr_stop_idletimer(sk); | |
527 | nr->state = NR_STATE_2; | |
528 | sk->sk_state = TCP_CLOSE; | |
529 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
530 | sk->sk_state_change(sk); | |
531 | sock_orphan(sk); | |
532 | sock_set_flag(sk, SOCK_DESTROY); | |
533 | sk->sk_socket = NULL; | |
534 | break; | |
535 | ||
536 | default: | |
537 | sk->sk_socket = NULL; | |
538 | break; | |
539 | } | |
540 | ||
5f8f59d6 | 541 | sock->sk = NULL; |
1da177e4 LT |
542 | release_sock(sk); |
543 | sock_put(sk); | |
544 | ||
545 | return 0; | |
546 | } | |
547 | ||
548 | static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
549 | { | |
550 | struct sock *sk = sock->sk; | |
551 | struct nr_sock *nr = nr_sk(sk); | |
552 | struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr; | |
553 | struct net_device *dev; | |
01d7dd0e RB |
554 | ax25_uid_assoc *user; |
555 | ax25_address *source; | |
1da177e4 LT |
556 | |
557 | lock_sock(sk); | |
558 | if (!sock_flag(sk, SOCK_ZAPPED)) { | |
559 | release_sock(sk); | |
560 | return -EINVAL; | |
561 | } | |
562 | if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) { | |
563 | release_sock(sk); | |
564 | return -EINVAL; | |
565 | } | |
566 | if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) { | |
567 | release_sock(sk); | |
568 | return -EINVAL; | |
569 | } | |
570 | if (addr->fsa_ax25.sax25_family != AF_NETROM) { | |
571 | release_sock(sk); | |
572 | return -EINVAL; | |
573 | } | |
574 | if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) { | |
575 | SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n"); | |
576 | release_sock(sk); | |
577 | return -EADDRNOTAVAIL; | |
578 | } | |
579 | ||
580 | /* | |
581 | * Only the super user can set an arbitrary user callsign. | |
582 | */ | |
583 | if (addr->fsa_ax25.sax25_ndigis == 1) { | |
584 | if (!capable(CAP_NET_BIND_SERVICE)) { | |
585 | dev_put(dev); | |
586 | release_sock(sk); | |
587 | return -EACCES; | |
588 | } | |
589 | nr->user_addr = addr->fsa_digipeater[0]; | |
590 | nr->source_addr = addr->fsa_ax25.sax25_call; | |
591 | } else { | |
592 | source = &addr->fsa_ax25.sax25_call; | |
593 | ||
01d7dd0e RB |
594 | user = ax25_findbyuid(current->euid); |
595 | if (user) { | |
596 | nr->user_addr = user->call; | |
597 | ax25_uid_put(user); | |
598 | } else { | |
1da177e4 LT |
599 | if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) { |
600 | release_sock(sk); | |
601 | dev_put(dev); | |
602 | return -EPERM; | |
603 | } | |
01d7dd0e | 604 | nr->user_addr = *source; |
1da177e4 LT |
605 | } |
606 | ||
1da177e4 LT |
607 | nr->source_addr = *source; |
608 | } | |
609 | ||
610 | nr->device = dev; | |
611 | nr_insert_socket(sk); | |
612 | ||
613 | sock_reset_flag(sk, SOCK_ZAPPED); | |
614 | dev_put(dev); | |
615 | release_sock(sk); | |
616 | SOCK_DEBUG(sk, "NET/ROM: socket is bound\n"); | |
617 | return 0; | |
618 | } | |
619 | ||
620 | static int nr_connect(struct socket *sock, struct sockaddr *uaddr, | |
621 | int addr_len, int flags) | |
622 | { | |
623 | struct sock *sk = sock->sk; | |
624 | struct nr_sock *nr = nr_sk(sk); | |
625 | struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr; | |
01d7dd0e RB |
626 | ax25_address *source = NULL; |
627 | ax25_uid_assoc *user; | |
1da177e4 | 628 | struct net_device *dev; |
75606dc6 | 629 | int err = 0; |
1da177e4 LT |
630 | |
631 | lock_sock(sk); | |
632 | if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { | |
633 | sock->state = SS_CONNECTED; | |
75606dc6 | 634 | goto out_release; /* Connect completed during a ERESTARTSYS event */ |
1da177e4 LT |
635 | } |
636 | ||
637 | if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { | |
638 | sock->state = SS_UNCONNECTED; | |
75606dc6 RB |
639 | err = -ECONNREFUSED; |
640 | goto out_release; | |
1da177e4 LT |
641 | } |
642 | ||
643 | if (sk->sk_state == TCP_ESTABLISHED) { | |
75606dc6 RB |
644 | err = -EISCONN; /* No reconnect on a seqpacket socket */ |
645 | goto out_release; | |
1da177e4 LT |
646 | } |
647 | ||
5f8f59d6 | 648 | sk->sk_state = TCP_CLOSE; |
1da177e4 LT |
649 | sock->state = SS_UNCONNECTED; |
650 | ||
651 | if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) { | |
75606dc6 RB |
652 | err = -EINVAL; |
653 | goto out_release; | |
1da177e4 LT |
654 | } |
655 | if (addr->sax25_family != AF_NETROM) { | |
75606dc6 RB |
656 | err = -EINVAL; |
657 | goto out_release; | |
1da177e4 LT |
658 | } |
659 | if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ | |
660 | sock_reset_flag(sk, SOCK_ZAPPED); | |
661 | ||
662 | if ((dev = nr_dev_first()) == NULL) { | |
75606dc6 RB |
663 | err = -ENETUNREACH; |
664 | goto out_release; | |
1da177e4 LT |
665 | } |
666 | source = (ax25_address *)dev->dev_addr; | |
667 | ||
01d7dd0e RB |
668 | user = ax25_findbyuid(current->euid); |
669 | if (user) { | |
670 | nr->user_addr = user->call; | |
671 | ax25_uid_put(user); | |
672 | } else { | |
1da177e4 LT |
673 | if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) { |
674 | dev_put(dev); | |
75606dc6 RB |
675 | err = -EPERM; |
676 | goto out_release; | |
1da177e4 | 677 | } |
01d7dd0e | 678 | nr->user_addr = *source; |
1da177e4 LT |
679 | } |
680 | ||
1da177e4 LT |
681 | nr->source_addr = *source; |
682 | nr->device = dev; | |
683 | ||
684 | dev_put(dev); | |
685 | nr_insert_socket(sk); /* Finish the bind */ | |
686 | } | |
687 | ||
688 | nr->dest_addr = addr->sax25_call; | |
689 | ||
690 | release_sock(sk); | |
691 | circuit = nr_find_next_circuit(); | |
692 | lock_sock(sk); | |
693 | ||
694 | nr->my_index = circuit / 256; | |
695 | nr->my_id = circuit % 256; | |
696 | ||
697 | circuit++; | |
698 | ||
699 | /* Move to connecting socket, start sending Connect Requests */ | |
700 | sock->state = SS_CONNECTING; | |
701 | sk->sk_state = TCP_SYN_SENT; | |
702 | ||
703 | nr_establish_data_link(sk); | |
704 | ||
705 | nr->state = NR_STATE_1; | |
706 | ||
707 | nr_start_heartbeat(sk); | |
708 | ||
709 | /* Now the loop */ | |
710 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { | |
75606dc6 RB |
711 | err = -EINPROGRESS; |
712 | goto out_release; | |
1da177e4 | 713 | } |
5f8f59d6 | 714 | |
1da177e4 LT |
715 | /* |
716 | * A Connect Ack with Choke or timeout or failed routing will go to | |
717 | * closed. | |
718 | */ | |
719 | if (sk->sk_state == TCP_SYN_SENT) { | |
75606dc6 | 720 | DEFINE_WAIT(wait); |
1da177e4 | 721 | |
1da177e4 | 722 | for (;;) { |
75606dc6 | 723 | prepare_to_wait(sk->sk_sleep, &wait, |
639fc4c3 | 724 | TASK_INTERRUPTIBLE); |
1da177e4 LT |
725 | if (sk->sk_state != TCP_SYN_SENT) |
726 | break; | |
75606dc6 RB |
727 | if (!signal_pending(current)) { |
728 | release_sock(sk); | |
1da177e4 LT |
729 | schedule(); |
730 | lock_sock(sk); | |
731 | continue; | |
732 | } | |
75606dc6 RB |
733 | err = -ERESTARTSYS; |
734 | break; | |
1da177e4 | 735 | } |
75606dc6 RB |
736 | finish_wait(sk->sk_sleep, &wait); |
737 | if (err) | |
738 | goto out_release; | |
1da177e4 LT |
739 | } |
740 | ||
741 | if (sk->sk_state != TCP_ESTABLISHED) { | |
742 | sock->state = SS_UNCONNECTED; | |
75606dc6 RB |
743 | err = sock_error(sk); /* Always set at this point */ |
744 | goto out_release; | |
1da177e4 LT |
745 | } |
746 | ||
747 | sock->state = SS_CONNECTED; | |
75606dc6 RB |
748 | |
749 | out_release: | |
1da177e4 LT |
750 | release_sock(sk); |
751 | ||
75606dc6 | 752 | return err; |
1da177e4 LT |
753 | } |
754 | ||
755 | static int nr_accept(struct socket *sock, struct socket *newsock, int flags) | |
756 | { | |
1da177e4 LT |
757 | struct sk_buff *skb; |
758 | struct sock *newsk; | |
75606dc6 | 759 | DEFINE_WAIT(wait); |
1da177e4 LT |
760 | struct sock *sk; |
761 | int err = 0; | |
762 | ||
763 | if ((sk = sock->sk) == NULL) | |
764 | return -EINVAL; | |
765 | ||
766 | lock_sock(sk); | |
767 | if (sk->sk_type != SOCK_SEQPACKET) { | |
768 | err = -EOPNOTSUPP; | |
75606dc6 | 769 | goto out_release; |
1da177e4 LT |
770 | } |
771 | ||
772 | if (sk->sk_state != TCP_LISTEN) { | |
773 | err = -EINVAL; | |
75606dc6 | 774 | goto out_release; |
1da177e4 LT |
775 | } |
776 | ||
777 | /* | |
778 | * The write queue this time is holding sockets ready to use | |
779 | * hooked into the SABM we saved | |
780 | */ | |
1da177e4 | 781 | for (;;) { |
75606dc6 | 782 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
783 | skb = skb_dequeue(&sk->sk_receive_queue); |
784 | if (skb) | |
785 | break; | |
786 | ||
1da177e4 | 787 | if (flags & O_NONBLOCK) { |
75606dc6 RB |
788 | err = -EWOULDBLOCK; |
789 | break; | |
1da177e4 | 790 | } |
75606dc6 RB |
791 | if (!signal_pending(current)) { |
792 | release_sock(sk); | |
1da177e4 LT |
793 | schedule(); |
794 | lock_sock(sk); | |
795 | continue; | |
796 | } | |
75606dc6 RB |
797 | err = -ERESTARTSYS; |
798 | break; | |
1da177e4 | 799 | } |
75606dc6 RB |
800 | finish_wait(sk->sk_sleep, &wait); |
801 | if (err) | |
802 | goto out_release; | |
1da177e4 LT |
803 | |
804 | newsk = skb->sk; | |
805 | newsk->sk_socket = newsock; | |
806 | newsk->sk_sleep = &newsock->wait; | |
807 | ||
808 | /* Now attach up the new socket */ | |
809 | kfree_skb(skb); | |
18601a7d | 810 | sk_acceptq_removed(sk); |
1da177e4 LT |
811 | newsock->sk = newsk; |
812 | ||
75606dc6 | 813 | out_release: |
1da177e4 | 814 | release_sock(sk); |
75606dc6 | 815 | |
1da177e4 LT |
816 | return err; |
817 | } | |
818 | ||
819 | static int nr_getname(struct socket *sock, struct sockaddr *uaddr, | |
820 | int *uaddr_len, int peer) | |
821 | { | |
822 | struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr; | |
823 | struct sock *sk = sock->sk; | |
824 | struct nr_sock *nr = nr_sk(sk); | |
825 | ||
826 | lock_sock(sk); | |
827 | if (peer != 0) { | |
828 | if (sk->sk_state != TCP_ESTABLISHED) { | |
829 | release_sock(sk); | |
830 | return -ENOTCONN; | |
831 | } | |
832 | sax->fsa_ax25.sax25_family = AF_NETROM; | |
833 | sax->fsa_ax25.sax25_ndigis = 1; | |
834 | sax->fsa_ax25.sax25_call = nr->user_addr; | |
835 | sax->fsa_digipeater[0] = nr->dest_addr; | |
836 | *uaddr_len = sizeof(struct full_sockaddr_ax25); | |
837 | } else { | |
838 | sax->fsa_ax25.sax25_family = AF_NETROM; | |
839 | sax->fsa_ax25.sax25_ndigis = 0; | |
840 | sax->fsa_ax25.sax25_call = nr->source_addr; | |
841 | *uaddr_len = sizeof(struct sockaddr_ax25); | |
842 | } | |
843 | release_sock(sk); | |
844 | ||
845 | return 0; | |
846 | } | |
847 | ||
848 | int nr_rx_frame(struct sk_buff *skb, struct net_device *dev) | |
849 | { | |
850 | struct sock *sk; | |
5f8f59d6 | 851 | struct sock *make; |
1da177e4 LT |
852 | struct nr_sock *nr_make; |
853 | ax25_address *src, *dest, *user; | |
854 | unsigned short circuit_index, circuit_id; | |
855 | unsigned short peer_circuit_index, peer_circuit_id; | |
856 | unsigned short frametype, flags, window, timeout; | |
857 | int ret; | |
858 | ||
859 | skb->sk = NULL; /* Initially we don't know who it's for */ | |
860 | ||
861 | /* | |
862 | * skb->data points to the netrom frame start | |
863 | */ | |
864 | ||
865 | src = (ax25_address *)(skb->data + 0); | |
866 | dest = (ax25_address *)(skb->data + 7); | |
867 | ||
868 | circuit_index = skb->data[15]; | |
869 | circuit_id = skb->data[16]; | |
870 | peer_circuit_index = skb->data[17]; | |
871 | peer_circuit_id = skb->data[18]; | |
872 | frametype = skb->data[19] & 0x0F; | |
873 | flags = skb->data[19] & 0xF0; | |
874 | ||
1da177e4 LT |
875 | /* |
876 | * Check for an incoming IP over NET/ROM frame. | |
877 | */ | |
98a82feb RB |
878 | if (frametype == NR_PROTOEXT && |
879 | circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) { | |
1da177e4 | 880 | skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN); |
badff6d0 | 881 | skb_reset_transport_header(skb); |
1da177e4 LT |
882 | |
883 | return nr_rx_ip(skb, dev); | |
884 | } | |
1da177e4 LT |
885 | |
886 | /* | |
887 | * Find an existing socket connection, based on circuit ID, if it's | |
888 | * a Connect Request base it on their circuit ID. | |
889 | * | |
890 | * Circuit ID 0/0 is not valid but it could still be a "reset" for a | |
891 | * circuit that no longer exists at the other end ... | |
892 | */ | |
893 | ||
894 | sk = NULL; | |
895 | ||
896 | if (circuit_index == 0 && circuit_id == 0) { | |
897 | if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG) | |
898 | sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src); | |
899 | } else { | |
900 | if (frametype == NR_CONNREQ) | |
901 | sk = nr_find_peer(circuit_index, circuit_id, src); | |
902 | else | |
903 | sk = nr_find_socket(circuit_index, circuit_id); | |
904 | } | |
905 | ||
906 | if (sk != NULL) { | |
badff6d0 | 907 | skb_reset_transport_header(skb); |
1da177e4 LT |
908 | |
909 | if (frametype == NR_CONNACK && skb->len == 22) | |
910 | nr_sk(sk)->bpqext = 1; | |
911 | else | |
912 | nr_sk(sk)->bpqext = 0; | |
913 | ||
914 | ret = nr_process_rx_frame(sk, skb); | |
915 | bh_unlock_sock(sk); | |
916 | return ret; | |
917 | } | |
918 | ||
919 | /* | |
920 | * Now it should be a CONNREQ. | |
921 | */ | |
922 | if (frametype != NR_CONNREQ) { | |
923 | /* | |
924 | * Here it would be nice to be able to send a reset but | |
e21ce8c7 RB |
925 | * NET/ROM doesn't have one. We've tried to extend the protocol |
926 | * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that | |
927 | * apparently kills BPQ boxes... :-( | |
928 | * So now we try to follow the established behaviour of | |
929 | * G8PZT's Xrouter which is sending packets with command type 7 | |
930 | * as an extension of the protocol. | |
1da177e4 | 931 | */ |
e21ce8c7 RB |
932 | if (sysctl_netrom_reset_circuit && |
933 | (frametype != NR_RESET || flags != 0)) | |
934 | nr_transmit_reset(skb, 1); | |
935 | ||
1da177e4 LT |
936 | return 0; |
937 | } | |
938 | ||
939 | sk = nr_find_listener(dest); | |
940 | ||
941 | user = (ax25_address *)(skb->data + 21); | |
942 | ||
943 | if (sk == NULL || sk_acceptq_is_full(sk) || | |
944 | (make = nr_make_new(sk)) == NULL) { | |
945 | nr_transmit_refusal(skb, 0); | |
946 | if (sk) | |
947 | bh_unlock_sock(sk); | |
948 | return 0; | |
949 | } | |
950 | ||
951 | window = skb->data[20]; | |
952 | ||
953 | skb->sk = make; | |
954 | make->sk_state = TCP_ESTABLISHED; | |
955 | ||
956 | /* Fill in his circuit details */ | |
957 | nr_make = nr_sk(make); | |
958 | nr_make->source_addr = *dest; | |
959 | nr_make->dest_addr = *src; | |
960 | nr_make->user_addr = *user; | |
961 | ||
962 | nr_make->your_index = circuit_index; | |
963 | nr_make->your_id = circuit_id; | |
964 | ||
965 | bh_unlock_sock(sk); | |
966 | circuit = nr_find_next_circuit(); | |
967 | bh_lock_sock(sk); | |
968 | ||
969 | nr_make->my_index = circuit / 256; | |
970 | nr_make->my_id = circuit % 256; | |
971 | ||
972 | circuit++; | |
973 | ||
974 | /* Window negotiation */ | |
975 | if (window < nr_make->window) | |
976 | nr_make->window = window; | |
977 | ||
978 | /* L4 timeout negotiation */ | |
979 | if (skb->len == 37) { | |
980 | timeout = skb->data[36] * 256 + skb->data[35]; | |
981 | if (timeout * HZ < nr_make->t1) | |
982 | nr_make->t1 = timeout * HZ; | |
983 | nr_make->bpqext = 1; | |
984 | } else { | |
985 | nr_make->bpqext = 0; | |
986 | } | |
987 | ||
988 | nr_write_internal(make, NR_CONNACK); | |
989 | ||
990 | nr_make->condition = 0x00; | |
991 | nr_make->vs = 0; | |
992 | nr_make->va = 0; | |
993 | nr_make->vr = 0; | |
994 | nr_make->vl = 0; | |
995 | nr_make->state = NR_STATE_3; | |
18601a7d | 996 | sk_acceptq_added(sk); |
1da177e4 LT |
997 | skb_queue_head(&sk->sk_receive_queue, skb); |
998 | ||
1da177e4 LT |
999 | if (!sock_flag(sk, SOCK_DEAD)) |
1000 | sk->sk_data_ready(sk, skb->len); | |
1001 | ||
1002 | bh_unlock_sock(sk); | |
5cc29e3b RB |
1003 | |
1004 | nr_insert_socket(make); | |
1005 | ||
1006 | nr_start_heartbeat(make); | |
1007 | nr_start_idletimer(make); | |
1008 | ||
1da177e4 LT |
1009 | return 1; |
1010 | } | |
1011 | ||
1012 | static int nr_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1013 | struct msghdr *msg, size_t len) | |
1014 | { | |
1015 | struct sock *sk = sock->sk; | |
1016 | struct nr_sock *nr = nr_sk(sk); | |
1017 | struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name; | |
1018 | int err; | |
1019 | struct sockaddr_ax25 sax; | |
1020 | struct sk_buff *skb; | |
1021 | unsigned char *asmptr; | |
1022 | int size; | |
1023 | ||
1024 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) | |
1025 | return -EINVAL; | |
1026 | ||
1027 | lock_sock(sk); | |
1028 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
1029 | err = -EADDRNOTAVAIL; | |
1030 | goto out; | |
1031 | } | |
1032 | ||
1033 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1034 | send_sig(SIGPIPE, current, 0); | |
1035 | err = -EPIPE; | |
1036 | goto out; | |
1037 | } | |
1038 | ||
1039 | if (nr->device == NULL) { | |
1040 | err = -ENETUNREACH; | |
1041 | goto out; | |
1042 | } | |
1043 | ||
1044 | if (usax) { | |
1045 | if (msg->msg_namelen < sizeof(sax)) { | |
1046 | err = -EINVAL; | |
1047 | goto out; | |
1048 | } | |
1049 | sax = *usax; | |
1050 | if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) { | |
1051 | err = -EISCONN; | |
1052 | goto out; | |
1053 | } | |
1054 | if (sax.sax25_family != AF_NETROM) { | |
1055 | err = -EINVAL; | |
1056 | goto out; | |
1057 | } | |
1058 | } else { | |
1059 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1060 | err = -ENOTCONN; | |
1061 | goto out; | |
1062 | } | |
1063 | sax.sax25_family = AF_NETROM; | |
1064 | sax.sax25_call = nr->dest_addr; | |
1065 | } | |
1066 | ||
1067 | SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n"); | |
1068 | ||
1069 | /* Build a packet */ | |
1070 | SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n"); | |
1071 | size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN; | |
1072 | ||
1073 | if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) | |
1074 | goto out; | |
1075 | ||
1076 | skb_reserve(skb, size - len); | |
eeeb0374 | 1077 | skb_reset_transport_header(skb); |
1da177e4 LT |
1078 | |
1079 | /* | |
1080 | * Push down the NET/ROM header | |
1081 | */ | |
1082 | ||
1083 | asmptr = skb_push(skb, NR_TRANSPORT_LEN); | |
1084 | SOCK_DEBUG(sk, "Building NET/ROM Header.\n"); | |
1085 | ||
1086 | /* Build a NET/ROM Transport header */ | |
1087 | ||
1088 | *asmptr++ = nr->your_index; | |
1089 | *asmptr++ = nr->your_id; | |
1090 | *asmptr++ = 0; /* To be filled in later */ | |
1091 | *asmptr++ = 0; /* Ditto */ | |
1092 | *asmptr++ = NR_INFO; | |
1093 | SOCK_DEBUG(sk, "Built header.\n"); | |
1094 | ||
1095 | /* | |
1096 | * Put the data on the end | |
1097 | */ | |
eeeb0374 | 1098 | skb_put(skb, len); |
1da177e4 | 1099 | |
1da177e4 LT |
1100 | SOCK_DEBUG(sk, "NET/ROM: Appending user data\n"); |
1101 | ||
1102 | /* User data follows immediately after the NET/ROM transport header */ | |
eeeb0374 | 1103 | if (memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len)) { |
1da177e4 LT |
1104 | kfree_skb(skb); |
1105 | err = -EFAULT; | |
1106 | goto out; | |
1107 | } | |
1108 | ||
1109 | SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n"); | |
1110 | ||
1111 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1112 | kfree_skb(skb); | |
1113 | err = -ENOTCONN; | |
1114 | goto out; | |
1115 | } | |
1116 | ||
1117 | nr_output(sk, skb); /* Shove it onto the queue */ | |
1118 | ||
1119 | err = len; | |
1120 | out: | |
1121 | release_sock(sk); | |
1122 | return err; | |
1123 | } | |
1124 | ||
1125 | static int nr_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1126 | struct msghdr *msg, size_t size, int flags) | |
1127 | { | |
1128 | struct sock *sk = sock->sk; | |
1129 | struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name; | |
1130 | size_t copied; | |
1131 | struct sk_buff *skb; | |
1132 | int er; | |
1133 | ||
1134 | /* | |
1135 | * This works for seqpacket too. The receiver has ordered the queue for | |
1136 | * us! We do one quick check first though | |
1137 | */ | |
1138 | ||
1139 | lock_sock(sk); | |
1140 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1141 | release_sock(sk); | |
1142 | return -ENOTCONN; | |
1143 | } | |
1144 | ||
1145 | /* Now we can treat all alike */ | |
1146 | if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) { | |
1147 | release_sock(sk); | |
1148 | return er; | |
1149 | } | |
1150 | ||
badff6d0 | 1151 | skb_reset_transport_header(skb); |
1da177e4 LT |
1152 | copied = skb->len; |
1153 | ||
1154 | if (copied > size) { | |
1155 | copied = size; | |
1156 | msg->msg_flags |= MSG_TRUNC; | |
1157 | } | |
1158 | ||
1159 | skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
1160 | ||
1161 | if (sax != NULL) { | |
1162 | sax->sax25_family = AF_NETROM; | |
d626f62b ACM |
1163 | skb_copy_from_linear_data_offset(skb, 7, sax->sax25_call.ax25_call, |
1164 | AX25_ADDR_LEN); | |
1da177e4 LT |
1165 | } |
1166 | ||
1167 | msg->msg_namelen = sizeof(*sax); | |
1168 | ||
1169 | skb_free_datagram(sk, skb); | |
1170 | ||
1171 | release_sock(sk); | |
1172 | return copied; | |
1173 | } | |
1174 | ||
1175 | ||
1176 | static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1177 | { | |
1178 | struct sock *sk = sock->sk; | |
1179 | void __user *argp = (void __user *)arg; | |
1180 | int ret; | |
1181 | ||
1da177e4 LT |
1182 | switch (cmd) { |
1183 | case TIOCOUTQ: { | |
1184 | long amount; | |
5ff7630e CH |
1185 | |
1186 | lock_sock(sk); | |
1da177e4 LT |
1187 | amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); |
1188 | if (amount < 0) | |
1189 | amount = 0; | |
1190 | release_sock(sk); | |
1191 | return put_user(amount, (int __user *)argp); | |
1192 | } | |
1193 | ||
1194 | case TIOCINQ: { | |
1195 | struct sk_buff *skb; | |
1196 | long amount = 0L; | |
5ff7630e CH |
1197 | |
1198 | lock_sock(sk); | |
1da177e4 LT |
1199 | /* These two are safe on a single CPU system as only user tasks fiddle here */ |
1200 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) | |
1201 | amount = skb->len; | |
1202 | release_sock(sk); | |
1203 | return put_user(amount, (int __user *)argp); | |
1204 | } | |
1205 | ||
1206 | case SIOCGSTAMP: | |
5ff7630e | 1207 | lock_sock(sk); |
9b37ee75 | 1208 | ret = sock_get_timestamp(sk, argp); |
1da177e4 LT |
1209 | release_sock(sk); |
1210 | return ret; | |
1211 | ||
ae40eb1e ED |
1212 | case SIOCGSTAMPNS: |
1213 | lock_sock(sk); | |
1214 | ret = sock_get_timestampns(sk, argp); | |
1215 | release_sock(sk); | |
1216 | return ret; | |
1217 | ||
1da177e4 LT |
1218 | case SIOCGIFADDR: |
1219 | case SIOCSIFADDR: | |
1220 | case SIOCGIFDSTADDR: | |
1221 | case SIOCSIFDSTADDR: | |
1222 | case SIOCGIFBRDADDR: | |
1223 | case SIOCSIFBRDADDR: | |
1224 | case SIOCGIFNETMASK: | |
1225 | case SIOCSIFNETMASK: | |
1226 | case SIOCGIFMETRIC: | |
1227 | case SIOCSIFMETRIC: | |
1da177e4 LT |
1228 | return -EINVAL; |
1229 | ||
1230 | case SIOCADDRT: | |
1231 | case SIOCDELRT: | |
1232 | case SIOCNRDECOBS: | |
1da177e4 LT |
1233 | if (!capable(CAP_NET_ADMIN)) return -EPERM; |
1234 | return nr_rt_ioctl(cmd, argp); | |
1235 | ||
1236 | default: | |
b5e5fa5e | 1237 | return -ENOIOCTLCMD; |
1da177e4 | 1238 | } |
1da177e4 LT |
1239 | |
1240 | return 0; | |
1241 | } | |
1242 | ||
1243 | #ifdef CONFIG_PROC_FS | |
1244 | ||
1245 | static void *nr_info_start(struct seq_file *seq, loff_t *pos) | |
1246 | { | |
1247 | struct sock *s; | |
1248 | struct hlist_node *node; | |
1249 | int i = 1; | |
1250 | ||
1251 | spin_lock_bh(&nr_list_lock); | |
1252 | if (*pos == 0) | |
1253 | return SEQ_START_TOKEN; | |
1254 | ||
1255 | sk_for_each(s, node, &nr_list) { | |
1256 | if (i == *pos) | |
1257 | return s; | |
1258 | ++i; | |
1259 | } | |
1260 | return NULL; | |
1261 | } | |
1262 | ||
1263 | static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos) | |
1264 | { | |
1265 | ++*pos; | |
1266 | ||
5f8f59d6 | 1267 | return (v == SEQ_START_TOKEN) ? sk_head(&nr_list) |
1da177e4 LT |
1268 | : sk_next((struct sock *)v); |
1269 | } | |
5f8f59d6 | 1270 | |
1da177e4 LT |
1271 | static void nr_info_stop(struct seq_file *seq, void *v) |
1272 | { | |
1273 | spin_unlock_bh(&nr_list_lock); | |
1274 | } | |
1275 | ||
1276 | static int nr_info_show(struct seq_file *seq, void *v) | |
1277 | { | |
1278 | struct sock *s = v; | |
1279 | struct net_device *dev; | |
1280 | struct nr_sock *nr; | |
1281 | const char *devname; | |
f75268cd | 1282 | char buf[11]; |
1da177e4 LT |
1283 | |
1284 | if (v == SEQ_START_TOKEN) | |
1285 | seq_puts(seq, | |
1286 | "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"); | |
1287 | ||
1288 | else { | |
1289 | ||
1290 | bh_lock_sock(s); | |
1291 | nr = nr_sk(s); | |
1292 | ||
1293 | if ((dev = nr->device) == NULL) | |
1294 | devname = "???"; | |
1295 | else | |
1296 | devname = dev->name; | |
1297 | ||
f75268cd RB |
1298 | seq_printf(seq, "%-9s ", ax2asc(buf, &nr->user_addr)); |
1299 | seq_printf(seq, "%-9s ", ax2asc(buf, &nr->dest_addr)); | |
5f8f59d6 | 1300 | seq_printf(seq, |
1da177e4 | 1301 | "%-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 | 1302 | ax2asc(buf, &nr->source_addr), |
1da177e4 LT |
1303 | devname, |
1304 | nr->my_index, | |
1305 | nr->my_id, | |
1306 | nr->your_index, | |
1307 | nr->your_id, | |
1308 | nr->state, | |
1309 | nr->vs, | |
1310 | nr->vr, | |
1311 | nr->va, | |
1312 | ax25_display_timer(&nr->t1timer) / HZ, | |
1313 | nr->t1 / HZ, | |
1314 | ax25_display_timer(&nr->t2timer) / HZ, | |
1315 | nr->t2 / HZ, | |
1316 | ax25_display_timer(&nr->t4timer) / HZ, | |
1317 | nr->t4 / HZ, | |
1318 | ax25_display_timer(&nr->idletimer) / (60 * HZ), | |
1319 | nr->idle / (60 * HZ), | |
1320 | nr->n2count, | |
1321 | nr->n2, | |
1322 | nr->window, | |
1323 | atomic_read(&s->sk_wmem_alloc), | |
1324 | atomic_read(&s->sk_rmem_alloc), | |
1325 | s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); | |
1326 | ||
1327 | bh_unlock_sock(s); | |
1328 | } | |
1329 | return 0; | |
1330 | } | |
1331 | ||
56b3d975 | 1332 | static const struct seq_operations nr_info_seqops = { |
1da177e4 LT |
1333 | .start = nr_info_start, |
1334 | .next = nr_info_next, | |
1335 | .stop = nr_info_stop, | |
1336 | .show = nr_info_show, | |
1337 | }; | |
5f8f59d6 | 1338 | |
1da177e4 LT |
1339 | static int nr_info_open(struct inode *inode, struct file *file) |
1340 | { | |
1341 | return seq_open(file, &nr_info_seqops); | |
1342 | } | |
5f8f59d6 | 1343 | |
da7071d7 | 1344 | static const struct file_operations nr_info_fops = { |
1da177e4 LT |
1345 | .owner = THIS_MODULE, |
1346 | .open = nr_info_open, | |
1347 | .read = seq_read, | |
1348 | .llseek = seq_lseek, | |
1349 | .release = seq_release, | |
1350 | }; | |
1351 | #endif /* CONFIG_PROC_FS */ | |
1352 | ||
1353 | static struct net_proto_family nr_family_ops = { | |
1354 | .family = PF_NETROM, | |
1355 | .create = nr_create, | |
1356 | .owner = THIS_MODULE, | |
1357 | }; | |
1358 | ||
90ddc4f0 | 1359 | static const struct proto_ops nr_proto_ops = { |
1da177e4 LT |
1360 | .family = PF_NETROM, |
1361 | .owner = THIS_MODULE, | |
1362 | .release = nr_release, | |
1363 | .bind = nr_bind, | |
1364 | .connect = nr_connect, | |
1365 | .socketpair = sock_no_socketpair, | |
1366 | .accept = nr_accept, | |
1367 | .getname = nr_getname, | |
1368 | .poll = datagram_poll, | |
1369 | .ioctl = nr_ioctl, | |
1370 | .listen = nr_listen, | |
1371 | .shutdown = sock_no_shutdown, | |
1372 | .setsockopt = nr_setsockopt, | |
1373 | .getsockopt = nr_getsockopt, | |
1374 | .sendmsg = nr_sendmsg, | |
1375 | .recvmsg = nr_recvmsg, | |
1376 | .mmap = sock_no_mmap, | |
1377 | .sendpage = sock_no_sendpage, | |
1378 | }; | |
1379 | ||
1380 | static struct notifier_block nr_dev_notifier = { | |
1381 | .notifier_call = nr_device_event, | |
1382 | }; | |
1383 | ||
1384 | static struct net_device **dev_nr; | |
1385 | ||
8d5cf596 RB |
1386 | static struct ax25_protocol nr_pid = { |
1387 | .pid = AX25_P_NETROM, | |
1388 | .func = nr_route_frame | |
1389 | }; | |
1390 | ||
a4282717 RB |
1391 | static struct ax25_linkfail nr_linkfail_notifier = { |
1392 | .func = nr_link_failed, | |
1393 | }; | |
1394 | ||
1da177e4 LT |
1395 | static int __init nr_proto_init(void) |
1396 | { | |
1397 | int i; | |
1398 | int rc = proto_register(&nr_proto, 0); | |
1399 | ||
1400 | if (rc != 0) | |
1401 | goto out; | |
1402 | ||
1403 | if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) { | |
1404 | printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n"); | |
1405 | return -1; | |
1406 | } | |
1407 | ||
1b30dd35 | 1408 | dev_nr = kzalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL); |
1da177e4 LT |
1409 | if (dev_nr == NULL) { |
1410 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n"); | |
1411 | return -1; | |
1412 | } | |
1413 | ||
1da177e4 LT |
1414 | for (i = 0; i < nr_ndevs; i++) { |
1415 | char name[IFNAMSIZ]; | |
1416 | struct net_device *dev; | |
1417 | ||
1418 | sprintf(name, "nr%d", i); | |
b88a762b | 1419 | dev = alloc_netdev(sizeof(struct nr_private), name, nr_setup); |
1da177e4 LT |
1420 | if (!dev) { |
1421 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n"); | |
1422 | goto fail; | |
1423 | } | |
5f8f59d6 | 1424 | |
1da177e4 LT |
1425 | dev->base_addr = i; |
1426 | if (register_netdev(dev)) { | |
1427 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n"); | |
1428 | free_netdev(dev); | |
1429 | goto fail; | |
1430 | } | |
4b260a98 | 1431 | lockdep_set_class(&dev->_xmit_lock, &nr_netdev_xmit_lock_key); |
1da177e4 LT |
1432 | dev_nr[i] = dev; |
1433 | } | |
1434 | ||
1435 | if (sock_register(&nr_family_ops)) { | |
1436 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n"); | |
1437 | goto fail; | |
1438 | } | |
5f8f59d6 | 1439 | |
1da177e4 | 1440 | register_netdevice_notifier(&nr_dev_notifier); |
1da177e4 | 1441 | |
8d5cf596 | 1442 | ax25_register_pid(&nr_pid); |
a4282717 | 1443 | ax25_linkfail_register(&nr_linkfail_notifier); |
1da177e4 LT |
1444 | |
1445 | #ifdef CONFIG_SYSCTL | |
1446 | nr_register_sysctl(); | |
1447 | #endif | |
1448 | ||
1449 | nr_loopback_init(); | |
1450 | ||
457c4cbc EB |
1451 | proc_net_fops_create(&init_net, "nr", S_IRUGO, &nr_info_fops); |
1452 | proc_net_fops_create(&init_net, "nr_neigh", S_IRUGO, &nr_neigh_fops); | |
1453 | proc_net_fops_create(&init_net, "nr_nodes", S_IRUGO, &nr_nodes_fops); | |
1da177e4 LT |
1454 | out: |
1455 | return rc; | |
1456 | fail: | |
1457 | while (--i >= 0) { | |
1458 | unregister_netdev(dev_nr[i]); | |
1459 | free_netdev(dev_nr[i]); | |
1460 | } | |
1461 | kfree(dev_nr); | |
1462 | proto_unregister(&nr_proto); | |
1463 | rc = -1; | |
1464 | goto out; | |
1465 | } | |
1466 | ||
1467 | module_init(nr_proto_init); | |
1468 | ||
1469 | module_param(nr_ndevs, int, 0); | |
1470 | MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices"); | |
1471 | ||
1472 | MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); | |
1473 | MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol"); | |
1474 | MODULE_LICENSE("GPL"); | |
1475 | MODULE_ALIAS_NETPROTO(PF_NETROM); | |
1476 | ||
1477 | static void __exit nr_exit(void) | |
1478 | { | |
1479 | int i; | |
1480 | ||
457c4cbc EB |
1481 | proc_net_remove(&init_net, "nr"); |
1482 | proc_net_remove(&init_net, "nr_neigh"); | |
1483 | proc_net_remove(&init_net, "nr_nodes"); | |
1da177e4 LT |
1484 | nr_loopback_clear(); |
1485 | ||
1486 | nr_rt_free(); | |
1487 | ||
1488 | #ifdef CONFIG_SYSCTL | |
1489 | nr_unregister_sysctl(); | |
1490 | #endif | |
1491 | ||
a4282717 | 1492 | ax25_linkfail_release(&nr_linkfail_notifier); |
1da177e4 LT |
1493 | ax25_protocol_release(AX25_P_NETROM); |
1494 | ||
1495 | unregister_netdevice_notifier(&nr_dev_notifier); | |
1496 | ||
1497 | sock_unregister(PF_NETROM); | |
1498 | ||
1499 | for (i = 0; i < nr_ndevs; i++) { | |
1500 | struct net_device *dev = dev_nr[i]; | |
1501 | if (dev) { | |
1502 | unregister_netdev(dev); | |
1503 | free_netdev(dev); | |
1504 | } | |
1505 | } | |
1506 | ||
1507 | kfree(dev_nr); | |
1508 | proto_unregister(&nr_proto); | |
1509 | } | |
1510 | module_exit(nr_exit); |