Commit | Line | Data |
---|---|---|
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> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
1da177e4 LT |
19 | #include <linux/kernel.h> |
20 | #include <linux/sched.h> | |
21 | #include <linux/timer.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/sockios.h> | |
24 | #include <linux/net.h> | |
25 | #include <linux/stat.h> | |
26 | #include <net/ax25.h> | |
27 | #include <linux/inet.h> | |
28 | #include <linux/netdevice.h> | |
29 | #include <linux/if_arp.h> | |
30 | #include <linux/skbuff.h> | |
457c4cbc | 31 | #include <net/net_namespace.h> |
1da177e4 LT |
32 | #include <net/sock.h> |
33 | #include <asm/uaccess.h> | |
34 | #include <asm/system.h> | |
35 | #include <linux/fcntl.h> | |
36 | #include <linux/termios.h> /* For TIOCINQ/OUTQ */ | |
37 | #include <linux/mm.h> | |
38 | #include <linux/interrupt.h> | |
39 | #include <linux/notifier.h> | |
40 | #include <net/netrom.h> | |
41 | #include <linux/proc_fs.h> | |
42 | #include <linux/seq_file.h> | |
43 | #include <net/ip.h> | |
c752f073 | 44 | #include <net/tcp_states.h> |
1da177e4 LT |
45 | #include <net/arp.h> |
46 | #include <linux/init.h> | |
47 | ||
48 | static int nr_ndevs = 4; | |
49 | ||
50 | int sysctl_netrom_default_path_quality = NR_DEFAULT_QUAL; | |
51 | int sysctl_netrom_obsolescence_count_initialiser = NR_DEFAULT_OBS; | |
52 | int sysctl_netrom_network_ttl_initialiser = NR_DEFAULT_TTL; | |
53 | int sysctl_netrom_transport_timeout = NR_DEFAULT_T1; | |
54 | int sysctl_netrom_transport_maximum_tries = NR_DEFAULT_N2; | |
55 | int sysctl_netrom_transport_acknowledge_delay = NR_DEFAULT_T2; | |
56 | int sysctl_netrom_transport_busy_delay = NR_DEFAULT_T4; | |
57 | int sysctl_netrom_transport_requested_window_size = NR_DEFAULT_WINDOW; | |
58 | int sysctl_netrom_transport_no_activity_timeout = NR_DEFAULT_IDLE; | |
59 | int sysctl_netrom_routing_control = NR_DEFAULT_ROUTING; | |
60 | int sysctl_netrom_link_fails_count = NR_DEFAULT_FAILS; | |
e21ce8c7 | 61 | int sysctl_netrom_reset_circuit = NR_DEFAULT_RESET; |
1da177e4 LT |
62 | |
63 | static unsigned short circuit = 0x101; | |
64 | ||
65 | static HLIST_HEAD(nr_list); | |
66 | static DEFINE_SPINLOCK(nr_list_lock); | |
67 | ||
90ddc4f0 | 68 | static const struct proto_ops nr_proto_ops; |
1da177e4 | 69 | |
4b260a98 RB |
70 | /* |
71 | * NETROM network devices are virtual network devices encapsulating NETROM | |
72 | * frames into AX.25 which will be sent through an AX.25 device, so form a | |
73 | * special "super class" of normal net devices; split their locks off into a | |
74 | * separate class since they always nest. | |
75 | */ | |
76 | static struct lock_class_key nr_netdev_xmit_lock_key; | |
cf508b12 | 77 | static struct lock_class_key nr_netdev_addr_lock_key; |
4b260a98 | 78 | |
e8a0464c DM |
79 | static void nr_set_lockdep_one(struct net_device *dev, |
80 | struct netdev_queue *txq, | |
81 | void *_unused) | |
c773e847 DM |
82 | { |
83 | lockdep_set_class(&txq->_xmit_lock, &nr_netdev_xmit_lock_key); | |
84 | } | |
85 | ||
86 | static void nr_set_lockdep_key(struct net_device *dev) | |
87 | { | |
cf508b12 | 88 | lockdep_set_class(&dev->addr_list_lock, &nr_netdev_addr_lock_key); |
e8a0464c | 89 | netdev_for_each_tx_queue(dev, nr_set_lockdep_one, NULL); |
c773e847 DM |
90 | } |
91 | ||
1da177e4 LT |
92 | /* |
93 | * Socket removal during an interrupt is now safe. | |
94 | */ | |
95 | static void nr_remove_socket(struct sock *sk) | |
96 | { | |
97 | spin_lock_bh(&nr_list_lock); | |
98 | sk_del_node_init(sk); | |
99 | spin_unlock_bh(&nr_list_lock); | |
100 | } | |
101 | ||
102 | /* | |
103 | * Kill all bound sockets on a dropped device. | |
104 | */ | |
105 | static void nr_kill_by_device(struct net_device *dev) | |
106 | { | |
107 | struct sock *s; | |
108 | struct hlist_node *node; | |
109 | ||
110 | spin_lock_bh(&nr_list_lock); | |
111 | sk_for_each(s, node, &nr_list) | |
112 | if (nr_sk(s)->device == dev) | |
113 | nr_disconnect(s, ENETUNREACH); | |
114 | spin_unlock_bh(&nr_list_lock); | |
115 | } | |
116 | ||
117 | /* | |
118 | * Handle device status changes. | |
119 | */ | |
120 | static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr) | |
121 | { | |
122 | struct net_device *dev = (struct net_device *)ptr; | |
123 | ||
721499e8 | 124 | if (!net_eq(dev_net(dev), &init_net)) |
e9dc8653 EB |
125 | return NOTIFY_DONE; |
126 | ||
1da177e4 LT |
127 | if (event != NETDEV_DOWN) |
128 | return NOTIFY_DONE; | |
129 | ||
130 | nr_kill_by_device(dev); | |
131 | nr_rt_device_down(dev); | |
5f8f59d6 | 132 | |
1da177e4 LT |
133 | return NOTIFY_DONE; |
134 | } | |
135 | ||
136 | /* | |
137 | * Add a socket to the bound sockets list. | |
138 | */ | |
139 | static void nr_insert_socket(struct sock *sk) | |
140 | { | |
141 | spin_lock_bh(&nr_list_lock); | |
142 | sk_add_node(sk, &nr_list); | |
143 | spin_unlock_bh(&nr_list_lock); | |
144 | } | |
145 | ||
146 | /* | |
147 | * Find a socket that wants to accept the Connect Request we just | |
148 | * received. | |
149 | */ | |
150 | static struct sock *nr_find_listener(ax25_address *addr) | |
151 | { | |
152 | struct sock *s; | |
153 | struct hlist_node *node; | |
154 | ||
155 | spin_lock_bh(&nr_list_lock); | |
156 | sk_for_each(s, node, &nr_list) | |
157 | if (!ax25cmp(&nr_sk(s)->source_addr, addr) && | |
158 | s->sk_state == TCP_LISTEN) { | |
5f8f59d6 | 159 | bh_lock_sock(s); |
1da177e4 LT |
160 | goto found; |
161 | } | |
162 | s = NULL; | |
163 | found: | |
164 | spin_unlock_bh(&nr_list_lock); | |
165 | return s; | |
166 | } | |
167 | ||
168 | /* | |
169 | * Find a connected NET/ROM socket given my circuit IDs. | |
170 | */ | |
171 | static struct sock *nr_find_socket(unsigned char index, unsigned char id) | |
172 | { | |
173 | struct sock *s; | |
174 | struct hlist_node *node; | |
175 | ||
176 | spin_lock_bh(&nr_list_lock); | |
177 | sk_for_each(s, node, &nr_list) { | |
178 | struct nr_sock *nr = nr_sk(s); | |
5f8f59d6 | 179 | |
1da177e4 LT |
180 | if (nr->my_index == index && nr->my_id == id) { |
181 | bh_lock_sock(s); | |
182 | goto found; | |
183 | } | |
184 | } | |
185 | s = NULL; | |
186 | found: | |
187 | spin_unlock_bh(&nr_list_lock); | |
188 | return s; | |
189 | } | |
190 | ||
191 | /* | |
192 | * Find a connected NET/ROM socket given their circuit IDs. | |
193 | */ | |
194 | static struct sock *nr_find_peer(unsigned char index, unsigned char id, | |
195 | ax25_address *dest) | |
196 | { | |
197 | struct sock *s; | |
198 | struct hlist_node *node; | |
199 | ||
200 | spin_lock_bh(&nr_list_lock); | |
201 | sk_for_each(s, node, &nr_list) { | |
202 | struct nr_sock *nr = nr_sk(s); | |
5f8f59d6 | 203 | |
1da177e4 LT |
204 | if (nr->your_index == index && nr->your_id == id && |
205 | !ax25cmp(&nr->dest_addr, dest)) { | |
5f8f59d6 | 206 | bh_lock_sock(s); |
1da177e4 LT |
207 | goto found; |
208 | } | |
209 | } | |
210 | s = NULL; | |
211 | found: | |
212 | spin_unlock_bh(&nr_list_lock); | |
213 | return s; | |
214 | } | |
215 | ||
216 | /* | |
217 | * Find next free circuit ID. | |
218 | */ | |
219 | static unsigned short nr_find_next_circuit(void) | |
220 | { | |
221 | unsigned short id = circuit; | |
222 | unsigned char i, j; | |
223 | struct sock *sk; | |
224 | ||
225 | for (;;) { | |
226 | i = id / 256; | |
227 | j = id % 256; | |
228 | ||
229 | if (i != 0 && j != 0) { | |
230 | if ((sk=nr_find_socket(i, j)) == NULL) | |
231 | break; | |
232 | bh_unlock_sock(sk); | |
233 | } | |
234 | ||
235 | id++; | |
236 | } | |
237 | ||
238 | return id; | |
239 | } | |
240 | ||
241 | /* | |
242 | * Deferred destroy. | |
243 | */ | |
244 | void nr_destroy_socket(struct sock *); | |
245 | ||
246 | /* | |
247 | * Handler for deferred kills. | |
248 | */ | |
249 | static void nr_destroy_timer(unsigned long data) | |
250 | { | |
251 | struct sock *sk=(struct sock *)data; | |
252 | bh_lock_sock(sk); | |
253 | sock_hold(sk); | |
254 | nr_destroy_socket(sk); | |
255 | bh_unlock_sock(sk); | |
256 | sock_put(sk); | |
257 | } | |
258 | ||
259 | /* | |
260 | * This is called from user mode and the timers. Thus it protects itself | |
261 | * against interrupt users but doesn't worry about being called during | |
262 | * work. Once it is removed from the queue no interrupt or bottom half | |
263 | * will touch it and we are (fairly 8-) ) safe. | |
264 | */ | |
265 | void nr_destroy_socket(struct sock *sk) | |
266 | { | |
267 | struct sk_buff *skb; | |
268 | ||
269 | nr_remove_socket(sk); | |
270 | ||
271 | nr_stop_heartbeat(sk); | |
272 | nr_stop_t1timer(sk); | |
273 | nr_stop_t2timer(sk); | |
274 | nr_stop_t4timer(sk); | |
275 | nr_stop_idletimer(sk); | |
276 | ||
277 | nr_clear_queues(sk); /* Flush the queues */ | |
278 | ||
279 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
280 | if (skb->sk != sk) { /* A pending connection */ | |
281 | /* Queue the unaccepted socket for death */ | |
282 | sock_set_flag(skb->sk, SOCK_DEAD); | |
283 | nr_start_heartbeat(skb->sk); | |
284 | nr_sk(skb->sk)->state = NR_STATE_0; | |
285 | } | |
286 | ||
287 | kfree_skb(skb); | |
288 | } | |
289 | ||
c564039f | 290 | if (sk_has_allocations(sk)) { |
1da177e4 LT |
291 | /* Defer: outstanding buffers */ |
292 | sk->sk_timer.function = nr_destroy_timer; | |
293 | sk->sk_timer.expires = jiffies + 2 * HZ; | |
294 | add_timer(&sk->sk_timer); | |
295 | } else | |
296 | sock_put(sk); | |
297 | } | |
298 | ||
299 | /* | |
300 | * Handling for system calls applied via the various interfaces to a | |
301 | * NET/ROM socket object. | |
302 | */ | |
303 | ||
304 | static int nr_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 305 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
306 | { |
307 | struct sock *sk = sock->sk; | |
308 | struct nr_sock *nr = nr_sk(sk); | |
309 | int opt; | |
310 | ||
311 | if (level != SOL_NETROM) | |
312 | return -ENOPROTOOPT; | |
313 | ||
314 | if (optlen < sizeof(int)) | |
315 | return -EINVAL; | |
316 | ||
317 | if (get_user(opt, (int __user *)optval)) | |
318 | return -EFAULT; | |
319 | ||
320 | switch (optname) { | |
321 | case NETROM_T1: | |
322 | if (opt < 1) | |
323 | return -EINVAL; | |
324 | nr->t1 = opt * HZ; | |
325 | return 0; | |
326 | ||
327 | case NETROM_T2: | |
328 | if (opt < 1) | |
329 | return -EINVAL; | |
330 | nr->t2 = opt * HZ; | |
331 | return 0; | |
332 | ||
333 | case NETROM_N2: | |
334 | if (opt < 1 || opt > 31) | |
335 | return -EINVAL; | |
336 | nr->n2 = opt; | |
337 | return 0; | |
338 | ||
339 | case NETROM_T4: | |
340 | if (opt < 1) | |
341 | return -EINVAL; | |
342 | nr->t4 = opt * HZ; | |
343 | return 0; | |
344 | ||
345 | case NETROM_IDLE: | |
346 | if (opt < 0) | |
347 | return -EINVAL; | |
348 | nr->idle = opt * 60 * HZ; | |
349 | return 0; | |
350 | ||
351 | default: | |
352 | return -ENOPROTOOPT; | |
353 | } | |
354 | } | |
355 | ||
356 | static int nr_getsockopt(struct socket *sock, int level, int optname, | |
357 | char __user *optval, int __user *optlen) | |
358 | { | |
359 | struct sock *sk = sock->sk; | |
360 | struct nr_sock *nr = nr_sk(sk); | |
361 | int val = 0; | |
5f8f59d6 | 362 | int len; |
1da177e4 LT |
363 | |
364 | if (level != SOL_NETROM) | |
365 | return -ENOPROTOOPT; | |
5f8f59d6 | 366 | |
1da177e4 LT |
367 | if (get_user(len, optlen)) |
368 | return -EFAULT; | |
369 | ||
370 | if (len < 0) | |
371 | return -EINVAL; | |
5f8f59d6 | 372 | |
1da177e4 LT |
373 | switch (optname) { |
374 | case NETROM_T1: | |
375 | val = nr->t1 / HZ; | |
376 | break; | |
377 | ||
378 | case NETROM_T2: | |
379 | val = nr->t2 / HZ; | |
380 | break; | |
381 | ||
382 | case NETROM_N2: | |
383 | val = nr->n2; | |
384 | break; | |
385 | ||
386 | case NETROM_T4: | |
387 | val = nr->t4 / HZ; | |
388 | break; | |
389 | ||
390 | case NETROM_IDLE: | |
391 | val = nr->idle / (60 * HZ); | |
392 | break; | |
393 | ||
394 | default: | |
395 | return -ENOPROTOOPT; | |
396 | } | |
397 | ||
398 | len = min_t(unsigned int, len, sizeof(int)); | |
399 | ||
400 | if (put_user(len, optlen)) | |
401 | return -EFAULT; | |
402 | ||
403 | return copy_to_user(optval, &val, len) ? -EFAULT : 0; | |
404 | } | |
405 | ||
406 | static int nr_listen(struct socket *sock, int backlog) | |
407 | { | |
408 | struct sock *sk = sock->sk; | |
409 | ||
410 | lock_sock(sk); | |
411 | if (sk->sk_state != TCP_LISTEN) { | |
412 | memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN); | |
413 | sk->sk_max_ack_backlog = backlog; | |
414 | sk->sk_state = TCP_LISTEN; | |
415 | release_sock(sk); | |
416 | return 0; | |
417 | } | |
418 | release_sock(sk); | |
419 | ||
420 | return -EOPNOTSUPP; | |
421 | } | |
422 | ||
423 | static struct proto nr_proto = { | |
424 | .name = "NETROM", | |
425 | .owner = THIS_MODULE, | |
426 | .obj_size = sizeof(struct nr_sock), | |
427 | }; | |
428 | ||
3f378b68 EP |
429 | static int nr_create(struct net *net, struct socket *sock, int protocol, |
430 | int kern) | |
1da177e4 LT |
431 | { |
432 | struct sock *sk; | |
433 | struct nr_sock *nr; | |
434 | ||
09ad9bc7 | 435 | if (!net_eq(net, &init_net)) |
1b8d7ae4 EB |
436 | return -EAFNOSUPPORT; |
437 | ||
1da177e4 LT |
438 | if (sock->type != SOCK_SEQPACKET || protocol != 0) |
439 | return -ESOCKTNOSUPPORT; | |
440 | ||
6257ff21 PE |
441 | sk = sk_alloc(net, PF_NETROM, GFP_ATOMIC, &nr_proto); |
442 | if (sk == NULL) | |
1da177e4 LT |
443 | return -ENOMEM; |
444 | ||
445 | nr = nr_sk(sk); | |
446 | ||
447 | sock_init_data(sock, sk); | |
448 | ||
449 | sock->ops = &nr_proto_ops; | |
450 | sk->sk_protocol = protocol; | |
451 | ||
452 | skb_queue_head_init(&nr->ack_queue); | |
453 | skb_queue_head_init(&nr->reseq_queue); | |
454 | skb_queue_head_init(&nr->frag_queue); | |
455 | ||
456 | nr_init_timers(sk); | |
457 | ||
4d8937d0 RB |
458 | nr->t1 = |
459 | msecs_to_jiffies(sysctl_netrom_transport_timeout); | |
460 | nr->t2 = | |
461 | msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay); | |
462 | nr->n2 = | |
463 | msecs_to_jiffies(sysctl_netrom_transport_maximum_tries); | |
464 | nr->t4 = | |
465 | msecs_to_jiffies(sysctl_netrom_transport_busy_delay); | |
466 | nr->idle = | |
467 | msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout); | |
1da177e4 LT |
468 | nr->window = sysctl_netrom_transport_requested_window_size; |
469 | ||
470 | nr->bpqext = 1; | |
471 | nr->state = NR_STATE_0; | |
472 | ||
473 | return 0; | |
474 | } | |
475 | ||
476 | static struct sock *nr_make_new(struct sock *osk) | |
477 | { | |
478 | struct sock *sk; | |
479 | struct nr_sock *nr, *onr; | |
480 | ||
481 | if (osk->sk_type != SOCK_SEQPACKET) | |
482 | return NULL; | |
483 | ||
3b1e0a65 | 484 | sk = sk_alloc(sock_net(osk), PF_NETROM, GFP_ATOMIC, osk->sk_prot); |
6257ff21 | 485 | if (sk == NULL) |
1da177e4 LT |
486 | return NULL; |
487 | ||
488 | nr = nr_sk(sk); | |
489 | ||
490 | sock_init_data(NULL, sk); | |
491 | ||
492 | sk->sk_type = osk->sk_type; | |
1da177e4 LT |
493 | sk->sk_priority = osk->sk_priority; |
494 | sk->sk_protocol = osk->sk_protocol; | |
495 | sk->sk_rcvbuf = osk->sk_rcvbuf; | |
496 | sk->sk_sndbuf = osk->sk_sndbuf; | |
497 | sk->sk_state = TCP_ESTABLISHED; | |
53b924b3 | 498 | sock_copy_flags(sk, osk); |
1da177e4 LT |
499 | |
500 | skb_queue_head_init(&nr->ack_queue); | |
501 | skb_queue_head_init(&nr->reseq_queue); | |
502 | skb_queue_head_init(&nr->frag_queue); | |
503 | ||
504 | nr_init_timers(sk); | |
505 | ||
506 | onr = nr_sk(osk); | |
507 | ||
508 | nr->t1 = onr->t1; | |
509 | nr->t2 = onr->t2; | |
510 | nr->n2 = onr->n2; | |
511 | nr->t4 = onr->t4; | |
512 | nr->idle = onr->idle; | |
513 | nr->window = onr->window; | |
514 | ||
515 | nr->device = onr->device; | |
516 | nr->bpqext = onr->bpqext; | |
517 | ||
518 | return sk; | |
519 | } | |
520 | ||
521 | static int nr_release(struct socket *sock) | |
522 | { | |
523 | struct sock *sk = sock->sk; | |
524 | struct nr_sock *nr; | |
525 | ||
526 | if (sk == NULL) return 0; | |
527 | ||
528 | sock_hold(sk); | |
859f4c74 | 529 | sock_orphan(sk); |
1da177e4 LT |
530 | lock_sock(sk); |
531 | nr = nr_sk(sk); | |
532 | ||
533 | switch (nr->state) { | |
534 | case NR_STATE_0: | |
535 | case NR_STATE_1: | |
536 | case NR_STATE_2: | |
537 | nr_disconnect(sk, 0); | |
538 | nr_destroy_socket(sk); | |
539 | break; | |
540 | ||
541 | case NR_STATE_3: | |
542 | nr_clear_queues(sk); | |
543 | nr->n2count = 0; | |
544 | nr_write_internal(sk, NR_DISCREQ); | |
545 | nr_start_t1timer(sk); | |
546 | nr_stop_t2timer(sk); | |
547 | nr_stop_t4timer(sk); | |
548 | nr_stop_idletimer(sk); | |
549 | nr->state = NR_STATE_2; | |
550 | sk->sk_state = TCP_CLOSE; | |
551 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
552 | sk->sk_state_change(sk); | |
1da177e4 | 553 | sock_set_flag(sk, SOCK_DESTROY); |
1da177e4 LT |
554 | break; |
555 | ||
556 | default: | |
1da177e4 LT |
557 | break; |
558 | } | |
559 | ||
5f8f59d6 | 560 | sock->sk = NULL; |
1da177e4 LT |
561 | release_sock(sk); |
562 | sock_put(sk); | |
563 | ||
564 | return 0; | |
565 | } | |
566 | ||
567 | static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
568 | { | |
569 | struct sock *sk = sock->sk; | |
570 | struct nr_sock *nr = nr_sk(sk); | |
571 | struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr; | |
572 | struct net_device *dev; | |
01d7dd0e RB |
573 | ax25_uid_assoc *user; |
574 | ax25_address *source; | |
1da177e4 LT |
575 | |
576 | lock_sock(sk); | |
577 | if (!sock_flag(sk, SOCK_ZAPPED)) { | |
578 | release_sock(sk); | |
579 | return -EINVAL; | |
580 | } | |
581 | if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) { | |
582 | release_sock(sk); | |
583 | return -EINVAL; | |
584 | } | |
585 | if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) { | |
586 | release_sock(sk); | |
587 | return -EINVAL; | |
588 | } | |
589 | if (addr->fsa_ax25.sax25_family != AF_NETROM) { | |
590 | release_sock(sk); | |
591 | return -EINVAL; | |
592 | } | |
593 | if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) { | |
594 | SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n"); | |
595 | release_sock(sk); | |
596 | return -EADDRNOTAVAIL; | |
597 | } | |
598 | ||
599 | /* | |
600 | * Only the super user can set an arbitrary user callsign. | |
601 | */ | |
602 | if (addr->fsa_ax25.sax25_ndigis == 1) { | |
603 | if (!capable(CAP_NET_BIND_SERVICE)) { | |
604 | dev_put(dev); | |
605 | release_sock(sk); | |
606 | return -EACCES; | |
607 | } | |
608 | nr->user_addr = addr->fsa_digipeater[0]; | |
609 | nr->source_addr = addr->fsa_ax25.sax25_call; | |
610 | } else { | |
611 | source = &addr->fsa_ax25.sax25_call; | |
612 | ||
ba95b235 | 613 | user = ax25_findbyuid(current_euid()); |
01d7dd0e RB |
614 | if (user) { |
615 | nr->user_addr = user->call; | |
616 | ax25_uid_put(user); | |
617 | } else { | |
1da177e4 LT |
618 | if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) { |
619 | release_sock(sk); | |
620 | dev_put(dev); | |
621 | return -EPERM; | |
622 | } | |
01d7dd0e | 623 | nr->user_addr = *source; |
1da177e4 LT |
624 | } |
625 | ||
1da177e4 LT |
626 | nr->source_addr = *source; |
627 | } | |
628 | ||
629 | nr->device = dev; | |
630 | nr_insert_socket(sk); | |
631 | ||
632 | sock_reset_flag(sk, SOCK_ZAPPED); | |
633 | dev_put(dev); | |
634 | release_sock(sk); | |
635 | SOCK_DEBUG(sk, "NET/ROM: socket is bound\n"); | |
636 | return 0; | |
637 | } | |
638 | ||
639 | static int nr_connect(struct socket *sock, struct sockaddr *uaddr, | |
640 | int addr_len, int flags) | |
641 | { | |
642 | struct sock *sk = sock->sk; | |
643 | struct nr_sock *nr = nr_sk(sk); | |
644 | struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr; | |
01d7dd0e RB |
645 | ax25_address *source = NULL; |
646 | ax25_uid_assoc *user; | |
1da177e4 | 647 | struct net_device *dev; |
75606dc6 | 648 | int err = 0; |
1da177e4 LT |
649 | |
650 | lock_sock(sk); | |
651 | if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { | |
652 | sock->state = SS_CONNECTED; | |
75606dc6 | 653 | goto out_release; /* Connect completed during a ERESTARTSYS event */ |
1da177e4 LT |
654 | } |
655 | ||
656 | if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { | |
657 | sock->state = SS_UNCONNECTED; | |
75606dc6 RB |
658 | err = -ECONNREFUSED; |
659 | goto out_release; | |
1da177e4 LT |
660 | } |
661 | ||
662 | if (sk->sk_state == TCP_ESTABLISHED) { | |
75606dc6 RB |
663 | err = -EISCONN; /* No reconnect on a seqpacket socket */ |
664 | goto out_release; | |
1da177e4 LT |
665 | } |
666 | ||
5f8f59d6 | 667 | sk->sk_state = TCP_CLOSE; |
1da177e4 LT |
668 | sock->state = SS_UNCONNECTED; |
669 | ||
670 | if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) { | |
75606dc6 RB |
671 | err = -EINVAL; |
672 | goto out_release; | |
1da177e4 LT |
673 | } |
674 | if (addr->sax25_family != AF_NETROM) { | |
75606dc6 RB |
675 | err = -EINVAL; |
676 | goto out_release; | |
1da177e4 LT |
677 | } |
678 | if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ | |
679 | sock_reset_flag(sk, SOCK_ZAPPED); | |
680 | ||
681 | if ((dev = nr_dev_first()) == NULL) { | |
75606dc6 RB |
682 | err = -ENETUNREACH; |
683 | goto out_release; | |
1da177e4 LT |
684 | } |
685 | source = (ax25_address *)dev->dev_addr; | |
686 | ||
ba95b235 | 687 | user = ax25_findbyuid(current_euid()); |
01d7dd0e RB |
688 | if (user) { |
689 | nr->user_addr = user->call; | |
690 | ax25_uid_put(user); | |
691 | } else { | |
1da177e4 LT |
692 | if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) { |
693 | dev_put(dev); | |
75606dc6 RB |
694 | err = -EPERM; |
695 | goto out_release; | |
1da177e4 | 696 | } |
01d7dd0e | 697 | nr->user_addr = *source; |
1da177e4 LT |
698 | } |
699 | ||
1da177e4 LT |
700 | nr->source_addr = *source; |
701 | nr->device = dev; | |
702 | ||
703 | dev_put(dev); | |
704 | nr_insert_socket(sk); /* Finish the bind */ | |
705 | } | |
706 | ||
707 | nr->dest_addr = addr->sax25_call; | |
708 | ||
709 | release_sock(sk); | |
710 | circuit = nr_find_next_circuit(); | |
711 | lock_sock(sk); | |
712 | ||
713 | nr->my_index = circuit / 256; | |
714 | nr->my_id = circuit % 256; | |
715 | ||
716 | circuit++; | |
717 | ||
718 | /* Move to connecting socket, start sending Connect Requests */ | |
719 | sock->state = SS_CONNECTING; | |
720 | sk->sk_state = TCP_SYN_SENT; | |
721 | ||
722 | nr_establish_data_link(sk); | |
723 | ||
724 | nr->state = NR_STATE_1; | |
725 | ||
726 | nr_start_heartbeat(sk); | |
727 | ||
728 | /* Now the loop */ | |
729 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { | |
75606dc6 RB |
730 | err = -EINPROGRESS; |
731 | goto out_release; | |
1da177e4 | 732 | } |
5f8f59d6 | 733 | |
1da177e4 LT |
734 | /* |
735 | * A Connect Ack with Choke or timeout or failed routing will go to | |
736 | * closed. | |
737 | */ | |
738 | if (sk->sk_state == TCP_SYN_SENT) { | |
75606dc6 | 739 | DEFINE_WAIT(wait); |
1da177e4 | 740 | |
1da177e4 | 741 | for (;;) { |
aa395145 | 742 | prepare_to_wait(sk_sleep(sk), &wait, |
639fc4c3 | 743 | TASK_INTERRUPTIBLE); |
1da177e4 LT |
744 | if (sk->sk_state != TCP_SYN_SENT) |
745 | break; | |
75606dc6 RB |
746 | if (!signal_pending(current)) { |
747 | release_sock(sk); | |
1da177e4 LT |
748 | schedule(); |
749 | lock_sock(sk); | |
750 | continue; | |
751 | } | |
75606dc6 RB |
752 | err = -ERESTARTSYS; |
753 | break; | |
1da177e4 | 754 | } |
aa395145 | 755 | finish_wait(sk_sleep(sk), &wait); |
75606dc6 RB |
756 | if (err) |
757 | goto out_release; | |
1da177e4 LT |
758 | } |
759 | ||
760 | if (sk->sk_state != TCP_ESTABLISHED) { | |
761 | sock->state = SS_UNCONNECTED; | |
75606dc6 RB |
762 | err = sock_error(sk); /* Always set at this point */ |
763 | goto out_release; | |
1da177e4 LT |
764 | } |
765 | ||
766 | sock->state = SS_CONNECTED; | |
75606dc6 RB |
767 | |
768 | out_release: | |
1da177e4 LT |
769 | release_sock(sk); |
770 | ||
75606dc6 | 771 | return err; |
1da177e4 LT |
772 | } |
773 | ||
774 | static int nr_accept(struct socket *sock, struct socket *newsock, int flags) | |
775 | { | |
1da177e4 LT |
776 | struct sk_buff *skb; |
777 | struct sock *newsk; | |
75606dc6 | 778 | DEFINE_WAIT(wait); |
1da177e4 LT |
779 | struct sock *sk; |
780 | int err = 0; | |
781 | ||
782 | if ((sk = sock->sk) == NULL) | |
783 | return -EINVAL; | |
784 | ||
785 | lock_sock(sk); | |
786 | if (sk->sk_type != SOCK_SEQPACKET) { | |
787 | err = -EOPNOTSUPP; | |
75606dc6 | 788 | goto out_release; |
1da177e4 LT |
789 | } |
790 | ||
791 | if (sk->sk_state != TCP_LISTEN) { | |
792 | err = -EINVAL; | |
75606dc6 | 793 | goto out_release; |
1da177e4 LT |
794 | } |
795 | ||
796 | /* | |
797 | * The write queue this time is holding sockets ready to use | |
798 | * hooked into the SABM we saved | |
799 | */ | |
1da177e4 | 800 | for (;;) { |
aa395145 | 801 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
802 | skb = skb_dequeue(&sk->sk_receive_queue); |
803 | if (skb) | |
804 | break; | |
805 | ||
1da177e4 | 806 | if (flags & O_NONBLOCK) { |
75606dc6 RB |
807 | err = -EWOULDBLOCK; |
808 | break; | |
1da177e4 | 809 | } |
75606dc6 RB |
810 | if (!signal_pending(current)) { |
811 | release_sock(sk); | |
1da177e4 LT |
812 | schedule(); |
813 | lock_sock(sk); | |
814 | continue; | |
815 | } | |
75606dc6 RB |
816 | err = -ERESTARTSYS; |
817 | break; | |
1da177e4 | 818 | } |
aa395145 | 819 | finish_wait(sk_sleep(sk), &wait); |
75606dc6 RB |
820 | if (err) |
821 | goto out_release; | |
1da177e4 LT |
822 | |
823 | newsk = skb->sk; | |
7b66767f | 824 | sock_graft(newsk, newsock); |
1da177e4 LT |
825 | |
826 | /* Now attach up the new socket */ | |
827 | kfree_skb(skb); | |
18601a7d | 828 | sk_acceptq_removed(sk); |
1da177e4 | 829 | |
75606dc6 | 830 | out_release: |
1da177e4 | 831 | release_sock(sk); |
75606dc6 | 832 | |
1da177e4 LT |
833 | return err; |
834 | } | |
835 | ||
836 | static int nr_getname(struct socket *sock, struct sockaddr *uaddr, | |
837 | int *uaddr_len, int peer) | |
838 | { | |
839 | struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr; | |
840 | struct sock *sk = sock->sk; | |
841 | struct nr_sock *nr = nr_sk(sk); | |
842 | ||
843 | lock_sock(sk); | |
844 | if (peer != 0) { | |
845 | if (sk->sk_state != TCP_ESTABLISHED) { | |
846 | release_sock(sk); | |
847 | return -ENOTCONN; | |
848 | } | |
849 | sax->fsa_ax25.sax25_family = AF_NETROM; | |
850 | sax->fsa_ax25.sax25_ndigis = 1; | |
851 | sax->fsa_ax25.sax25_call = nr->user_addr; | |
f6b97b29 | 852 | memset(sax->fsa_digipeater, 0, sizeof(sax->fsa_digipeater)); |
1da177e4 LT |
853 | sax->fsa_digipeater[0] = nr->dest_addr; |
854 | *uaddr_len = sizeof(struct full_sockaddr_ax25); | |
855 | } else { | |
856 | sax->fsa_ax25.sax25_family = AF_NETROM; | |
857 | sax->fsa_ax25.sax25_ndigis = 0; | |
858 | sax->fsa_ax25.sax25_call = nr->source_addr; | |
859 | *uaddr_len = sizeof(struct sockaddr_ax25); | |
860 | } | |
861 | release_sock(sk); | |
862 | ||
863 | return 0; | |
864 | } | |
865 | ||
866 | int nr_rx_frame(struct sk_buff *skb, struct net_device *dev) | |
867 | { | |
868 | struct sock *sk; | |
5f8f59d6 | 869 | struct sock *make; |
1da177e4 LT |
870 | struct nr_sock *nr_make; |
871 | ax25_address *src, *dest, *user; | |
872 | unsigned short circuit_index, circuit_id; | |
873 | unsigned short peer_circuit_index, peer_circuit_id; | |
874 | unsigned short frametype, flags, window, timeout; | |
875 | int ret; | |
876 | ||
877 | skb->sk = NULL; /* Initially we don't know who it's for */ | |
878 | ||
879 | /* | |
880 | * skb->data points to the netrom frame start | |
881 | */ | |
882 | ||
883 | src = (ax25_address *)(skb->data + 0); | |
884 | dest = (ax25_address *)(skb->data + 7); | |
885 | ||
886 | circuit_index = skb->data[15]; | |
887 | circuit_id = skb->data[16]; | |
888 | peer_circuit_index = skb->data[17]; | |
889 | peer_circuit_id = skb->data[18]; | |
890 | frametype = skb->data[19] & 0x0F; | |
891 | flags = skb->data[19] & 0xF0; | |
892 | ||
1da177e4 LT |
893 | /* |
894 | * Check for an incoming IP over NET/ROM frame. | |
895 | */ | |
98a82feb RB |
896 | if (frametype == NR_PROTOEXT && |
897 | circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) { | |
1da177e4 | 898 | skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN); |
badff6d0 | 899 | skb_reset_transport_header(skb); |
1da177e4 LT |
900 | |
901 | return nr_rx_ip(skb, dev); | |
902 | } | |
1da177e4 LT |
903 | |
904 | /* | |
905 | * Find an existing socket connection, based on circuit ID, if it's | |
906 | * a Connect Request base it on their circuit ID. | |
907 | * | |
908 | * Circuit ID 0/0 is not valid but it could still be a "reset" for a | |
909 | * circuit that no longer exists at the other end ... | |
910 | */ | |
911 | ||
912 | sk = NULL; | |
913 | ||
914 | if (circuit_index == 0 && circuit_id == 0) { | |
915 | if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG) | |
916 | sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src); | |
917 | } else { | |
918 | if (frametype == NR_CONNREQ) | |
919 | sk = nr_find_peer(circuit_index, circuit_id, src); | |
920 | else | |
921 | sk = nr_find_socket(circuit_index, circuit_id); | |
922 | } | |
923 | ||
924 | if (sk != NULL) { | |
badff6d0 | 925 | skb_reset_transport_header(skb); |
1da177e4 LT |
926 | |
927 | if (frametype == NR_CONNACK && skb->len == 22) | |
928 | nr_sk(sk)->bpqext = 1; | |
929 | else | |
930 | nr_sk(sk)->bpqext = 0; | |
931 | ||
932 | ret = nr_process_rx_frame(sk, skb); | |
933 | bh_unlock_sock(sk); | |
934 | return ret; | |
935 | } | |
936 | ||
937 | /* | |
938 | * Now it should be a CONNREQ. | |
939 | */ | |
940 | if (frametype != NR_CONNREQ) { | |
941 | /* | |
942 | * Here it would be nice to be able to send a reset but | |
e21ce8c7 RB |
943 | * NET/ROM doesn't have one. We've tried to extend the protocol |
944 | * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that | |
945 | * apparently kills BPQ boxes... :-( | |
946 | * So now we try to follow the established behaviour of | |
947 | * G8PZT's Xrouter which is sending packets with command type 7 | |
948 | * as an extension of the protocol. | |
1da177e4 | 949 | */ |
e21ce8c7 RB |
950 | if (sysctl_netrom_reset_circuit && |
951 | (frametype != NR_RESET || flags != 0)) | |
952 | nr_transmit_reset(skb, 1); | |
953 | ||
1da177e4 LT |
954 | return 0; |
955 | } | |
956 | ||
957 | sk = nr_find_listener(dest); | |
958 | ||
959 | user = (ax25_address *)(skb->data + 21); | |
960 | ||
961 | if (sk == NULL || sk_acceptq_is_full(sk) || | |
962 | (make = nr_make_new(sk)) == NULL) { | |
963 | nr_transmit_refusal(skb, 0); | |
964 | if (sk) | |
965 | bh_unlock_sock(sk); | |
966 | return 0; | |
967 | } | |
968 | ||
969 | window = skb->data[20]; | |
970 | ||
971 | skb->sk = make; | |
972 | make->sk_state = TCP_ESTABLISHED; | |
973 | ||
974 | /* Fill in his circuit details */ | |
975 | nr_make = nr_sk(make); | |
976 | nr_make->source_addr = *dest; | |
977 | nr_make->dest_addr = *src; | |
978 | nr_make->user_addr = *user; | |
979 | ||
980 | nr_make->your_index = circuit_index; | |
981 | nr_make->your_id = circuit_id; | |
982 | ||
983 | bh_unlock_sock(sk); | |
984 | circuit = nr_find_next_circuit(); | |
985 | bh_lock_sock(sk); | |
986 | ||
987 | nr_make->my_index = circuit / 256; | |
988 | nr_make->my_id = circuit % 256; | |
989 | ||
990 | circuit++; | |
991 | ||
992 | /* Window negotiation */ | |
993 | if (window < nr_make->window) | |
994 | nr_make->window = window; | |
995 | ||
996 | /* L4 timeout negotiation */ | |
997 | if (skb->len == 37) { | |
998 | timeout = skb->data[36] * 256 + skb->data[35]; | |
999 | if (timeout * HZ < nr_make->t1) | |
1000 | nr_make->t1 = timeout * HZ; | |
1001 | nr_make->bpqext = 1; | |
1002 | } else { | |
1003 | nr_make->bpqext = 0; | |
1004 | } | |
1005 | ||
1006 | nr_write_internal(make, NR_CONNACK); | |
1007 | ||
1008 | nr_make->condition = 0x00; | |
1009 | nr_make->vs = 0; | |
1010 | nr_make->va = 0; | |
1011 | nr_make->vr = 0; | |
1012 | nr_make->vl = 0; | |
1013 | nr_make->state = NR_STATE_3; | |
18601a7d | 1014 | sk_acceptq_added(sk); |
1da177e4 LT |
1015 | skb_queue_head(&sk->sk_receive_queue, skb); |
1016 | ||
1da177e4 LT |
1017 | if (!sock_flag(sk, SOCK_DEAD)) |
1018 | sk->sk_data_ready(sk, skb->len); | |
1019 | ||
1020 | bh_unlock_sock(sk); | |
5cc29e3b RB |
1021 | |
1022 | nr_insert_socket(make); | |
1023 | ||
1024 | nr_start_heartbeat(make); | |
1025 | nr_start_idletimer(make); | |
1026 | ||
1da177e4 LT |
1027 | return 1; |
1028 | } | |
1029 | ||
1030 | static int nr_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1031 | struct msghdr *msg, size_t len) | |
1032 | { | |
1033 | struct sock *sk = sock->sk; | |
1034 | struct nr_sock *nr = nr_sk(sk); | |
1035 | struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name; | |
1036 | int err; | |
1037 | struct sockaddr_ax25 sax; | |
1038 | struct sk_buff *skb; | |
1039 | unsigned char *asmptr; | |
1040 | int size; | |
1041 | ||
1042 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) | |
1043 | return -EINVAL; | |
1044 | ||
1045 | lock_sock(sk); | |
1046 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
1047 | err = -EADDRNOTAVAIL; | |
1048 | goto out; | |
1049 | } | |
1050 | ||
1051 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1052 | send_sig(SIGPIPE, current, 0); | |
1053 | err = -EPIPE; | |
1054 | goto out; | |
1055 | } | |
1056 | ||
1057 | if (nr->device == NULL) { | |
1058 | err = -ENETUNREACH; | |
1059 | goto out; | |
1060 | } | |
1061 | ||
1062 | if (usax) { | |
1063 | if (msg->msg_namelen < sizeof(sax)) { | |
1064 | err = -EINVAL; | |
1065 | goto out; | |
1066 | } | |
1067 | sax = *usax; | |
1068 | if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) { | |
1069 | err = -EISCONN; | |
1070 | goto out; | |
1071 | } | |
1072 | if (sax.sax25_family != AF_NETROM) { | |
1073 | err = -EINVAL; | |
1074 | goto out; | |
1075 | } | |
1076 | } else { | |
1077 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1078 | err = -ENOTCONN; | |
1079 | goto out; | |
1080 | } | |
1081 | sax.sax25_family = AF_NETROM; | |
1082 | sax.sax25_call = nr->dest_addr; | |
1083 | } | |
1084 | ||
1085 | SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n"); | |
1086 | ||
83e0bbcb AC |
1087 | /* Build a packet - the conventional user limit is 236 bytes. We can |
1088 | do ludicrously large NetROM frames but must not overflow */ | |
cc29c70d JD |
1089 | if (len > 65536) { |
1090 | err = -EMSGSIZE; | |
1091 | goto out; | |
1092 | } | |
83e0bbcb | 1093 | |
1da177e4 LT |
1094 | SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n"); |
1095 | size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN; | |
1096 | ||
1097 | if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) | |
1098 | goto out; | |
1099 | ||
1100 | skb_reserve(skb, size - len); | |
eeeb0374 | 1101 | skb_reset_transport_header(skb); |
1da177e4 LT |
1102 | |
1103 | /* | |
1104 | * Push down the NET/ROM header | |
1105 | */ | |
1106 | ||
1107 | asmptr = skb_push(skb, NR_TRANSPORT_LEN); | |
1108 | SOCK_DEBUG(sk, "Building NET/ROM Header.\n"); | |
1109 | ||
1110 | /* Build a NET/ROM Transport header */ | |
1111 | ||
1112 | *asmptr++ = nr->your_index; | |
1113 | *asmptr++ = nr->your_id; | |
1114 | *asmptr++ = 0; /* To be filled in later */ | |
1115 | *asmptr++ = 0; /* Ditto */ | |
1116 | *asmptr++ = NR_INFO; | |
1117 | SOCK_DEBUG(sk, "Built header.\n"); | |
1118 | ||
1119 | /* | |
1120 | * Put the data on the end | |
1121 | */ | |
eeeb0374 | 1122 | skb_put(skb, len); |
1da177e4 | 1123 | |
1da177e4 LT |
1124 | SOCK_DEBUG(sk, "NET/ROM: Appending user data\n"); |
1125 | ||
1126 | /* User data follows immediately after the NET/ROM transport header */ | |
eeeb0374 | 1127 | if (memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len)) { |
1da177e4 LT |
1128 | kfree_skb(skb); |
1129 | err = -EFAULT; | |
1130 | goto out; | |
1131 | } | |
1132 | ||
1133 | SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n"); | |
1134 | ||
1135 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1136 | kfree_skb(skb); | |
1137 | err = -ENOTCONN; | |
1138 | goto out; | |
1139 | } | |
1140 | ||
1141 | nr_output(sk, skb); /* Shove it onto the queue */ | |
1142 | ||
1143 | err = len; | |
1144 | out: | |
1145 | release_sock(sk); | |
1146 | return err; | |
1147 | } | |
1148 | ||
1149 | static int nr_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1150 | struct msghdr *msg, size_t size, int flags) | |
1151 | { | |
1152 | struct sock *sk = sock->sk; | |
1153 | struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name; | |
1154 | size_t copied; | |
1155 | struct sk_buff *skb; | |
1156 | int er; | |
1157 | ||
1158 | /* | |
1159 | * This works for seqpacket too. The receiver has ordered the queue for | |
1160 | * us! We do one quick check first though | |
1161 | */ | |
1162 | ||
1163 | lock_sock(sk); | |
1164 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1165 | release_sock(sk); | |
1166 | return -ENOTCONN; | |
1167 | } | |
1168 | ||
1169 | /* Now we can treat all alike */ | |
1170 | if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) { | |
1171 | release_sock(sk); | |
1172 | return er; | |
1173 | } | |
1174 | ||
badff6d0 | 1175 | skb_reset_transport_header(skb); |
1da177e4 LT |
1176 | copied = skb->len; |
1177 | ||
1178 | if (copied > size) { | |
1179 | copied = size; | |
1180 | msg->msg_flags |= MSG_TRUNC; | |
1181 | } | |
1182 | ||
1183 | skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
1184 | ||
1185 | if (sax != NULL) { | |
1186 | sax->sax25_family = AF_NETROM; | |
d626f62b ACM |
1187 | skb_copy_from_linear_data_offset(skb, 7, sax->sax25_call.ax25_call, |
1188 | AX25_ADDR_LEN); | |
1da177e4 LT |
1189 | } |
1190 | ||
1191 | msg->msg_namelen = sizeof(*sax); | |
1192 | ||
80e20f6f | 1193 | skb_free_datagram(sk, skb); |
1da177e4 LT |
1194 | |
1195 | release_sock(sk); | |
1196 | return copied; | |
1197 | } | |
1198 | ||
1199 | ||
1200 | static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1201 | { | |
1202 | struct sock *sk = sock->sk; | |
1203 | void __user *argp = (void __user *)arg; | |
1204 | int ret; | |
1205 | ||
1da177e4 LT |
1206 | switch (cmd) { |
1207 | case TIOCOUTQ: { | |
1208 | long amount; | |
5ff7630e CH |
1209 | |
1210 | lock_sock(sk); | |
31e6d363 | 1211 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
1da177e4 LT |
1212 | if (amount < 0) |
1213 | amount = 0; | |
1214 | release_sock(sk); | |
1215 | return put_user(amount, (int __user *)argp); | |
1216 | } | |
1217 | ||
1218 | case TIOCINQ: { | |
1219 | struct sk_buff *skb; | |
1220 | long amount = 0L; | |
5ff7630e CH |
1221 | |
1222 | lock_sock(sk); | |
1da177e4 LT |
1223 | /* These two are safe on a single CPU system as only user tasks fiddle here */ |
1224 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) | |
1225 | amount = skb->len; | |
1226 | release_sock(sk); | |
1227 | return put_user(amount, (int __user *)argp); | |
1228 | } | |
1229 | ||
1230 | case SIOCGSTAMP: | |
5ff7630e | 1231 | lock_sock(sk); |
9b37ee75 | 1232 | ret = sock_get_timestamp(sk, argp); |
1da177e4 LT |
1233 | release_sock(sk); |
1234 | return ret; | |
1235 | ||
ae40eb1e ED |
1236 | case SIOCGSTAMPNS: |
1237 | lock_sock(sk); | |
1238 | ret = sock_get_timestampns(sk, argp); | |
1239 | release_sock(sk); | |
1240 | return ret; | |
1241 | ||
1da177e4 LT |
1242 | case SIOCGIFADDR: |
1243 | case SIOCSIFADDR: | |
1244 | case SIOCGIFDSTADDR: | |
1245 | case SIOCSIFDSTADDR: | |
1246 | case SIOCGIFBRDADDR: | |
1247 | case SIOCSIFBRDADDR: | |
1248 | case SIOCGIFNETMASK: | |
1249 | case SIOCSIFNETMASK: | |
1250 | case SIOCGIFMETRIC: | |
1251 | case SIOCSIFMETRIC: | |
1da177e4 LT |
1252 | return -EINVAL; |
1253 | ||
1254 | case SIOCADDRT: | |
1255 | case SIOCDELRT: | |
1256 | case SIOCNRDECOBS: | |
1da177e4 LT |
1257 | if (!capable(CAP_NET_ADMIN)) return -EPERM; |
1258 | return nr_rt_ioctl(cmd, argp); | |
1259 | ||
1260 | default: | |
b5e5fa5e | 1261 | return -ENOIOCTLCMD; |
1da177e4 | 1262 | } |
1da177e4 LT |
1263 | |
1264 | return 0; | |
1265 | } | |
1266 | ||
1267 | #ifdef CONFIG_PROC_FS | |
1268 | ||
1269 | static void *nr_info_start(struct seq_file *seq, loff_t *pos) | |
1270 | { | |
1da177e4 | 1271 | spin_lock_bh(&nr_list_lock); |
90dd7f5a | 1272 | return seq_hlist_start_head(&nr_list, *pos); |
1da177e4 LT |
1273 | } |
1274 | ||
1275 | static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos) | |
1276 | { | |
90dd7f5a | 1277 | return seq_hlist_next(v, &nr_list, pos); |
1da177e4 | 1278 | } |
5f8f59d6 | 1279 | |
1da177e4 LT |
1280 | static void nr_info_stop(struct seq_file *seq, void *v) |
1281 | { | |
1282 | spin_unlock_bh(&nr_list_lock); | |
1283 | } | |
1284 | ||
1285 | static int nr_info_show(struct seq_file *seq, void *v) | |
1286 | { | |
90dd7f5a | 1287 | struct sock *s = sk_entry(v); |
1da177e4 LT |
1288 | struct net_device *dev; |
1289 | struct nr_sock *nr; | |
1290 | const char *devname; | |
f75268cd | 1291 | char buf[11]; |
1da177e4 LT |
1292 | |
1293 | if (v == SEQ_START_TOKEN) | |
1294 | seq_puts(seq, | |
1295 | "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"); | |
1296 | ||
1297 | else { | |
1298 | ||
1299 | bh_lock_sock(s); | |
1300 | nr = nr_sk(s); | |
1301 | ||
1302 | if ((dev = nr->device) == NULL) | |
1303 | devname = "???"; | |
1304 | else | |
1305 | devname = dev->name; | |
1306 | ||
f75268cd RB |
1307 | seq_printf(seq, "%-9s ", ax2asc(buf, &nr->user_addr)); |
1308 | seq_printf(seq, "%-9s ", ax2asc(buf, &nr->dest_addr)); | |
5f8f59d6 | 1309 | seq_printf(seq, |
1da177e4 | 1310 | "%-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 | 1311 | ax2asc(buf, &nr->source_addr), |
1da177e4 LT |
1312 | devname, |
1313 | nr->my_index, | |
1314 | nr->my_id, | |
1315 | nr->your_index, | |
1316 | nr->your_id, | |
1317 | nr->state, | |
1318 | nr->vs, | |
1319 | nr->vr, | |
1320 | nr->va, | |
1321 | ax25_display_timer(&nr->t1timer) / HZ, | |
1322 | nr->t1 / HZ, | |
1323 | ax25_display_timer(&nr->t2timer) / HZ, | |
1324 | nr->t2 / HZ, | |
1325 | ax25_display_timer(&nr->t4timer) / HZ, | |
1326 | nr->t4 / HZ, | |
1327 | ax25_display_timer(&nr->idletimer) / (60 * HZ), | |
1328 | nr->idle / (60 * HZ), | |
1329 | nr->n2count, | |
1330 | nr->n2, | |
1331 | nr->window, | |
31e6d363 ED |
1332 | sk_wmem_alloc_get(s), |
1333 | sk_rmem_alloc_get(s), | |
1da177e4 LT |
1334 | s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); |
1335 | ||
1336 | bh_unlock_sock(s); | |
1337 | } | |
1338 | return 0; | |
1339 | } | |
1340 | ||
56b3d975 | 1341 | static const struct seq_operations nr_info_seqops = { |
1da177e4 LT |
1342 | .start = nr_info_start, |
1343 | .next = nr_info_next, | |
1344 | .stop = nr_info_stop, | |
1345 | .show = nr_info_show, | |
1346 | }; | |
5f8f59d6 | 1347 | |
1da177e4 LT |
1348 | static int nr_info_open(struct inode *inode, struct file *file) |
1349 | { | |
1350 | return seq_open(file, &nr_info_seqops); | |
1351 | } | |
5f8f59d6 | 1352 | |
da7071d7 | 1353 | static const struct file_operations nr_info_fops = { |
1da177e4 LT |
1354 | .owner = THIS_MODULE, |
1355 | .open = nr_info_open, | |
1356 | .read = seq_read, | |
1357 | .llseek = seq_lseek, | |
1358 | .release = seq_release, | |
1359 | }; | |
1360 | #endif /* CONFIG_PROC_FS */ | |
1361 | ||
ec1b4cf7 | 1362 | static const struct net_proto_family nr_family_ops = { |
1da177e4 LT |
1363 | .family = PF_NETROM, |
1364 | .create = nr_create, | |
1365 | .owner = THIS_MODULE, | |
1366 | }; | |
1367 | ||
90ddc4f0 | 1368 | static const struct proto_ops nr_proto_ops = { |
1da177e4 LT |
1369 | .family = PF_NETROM, |
1370 | .owner = THIS_MODULE, | |
1371 | .release = nr_release, | |
1372 | .bind = nr_bind, | |
1373 | .connect = nr_connect, | |
1374 | .socketpair = sock_no_socketpair, | |
1375 | .accept = nr_accept, | |
1376 | .getname = nr_getname, | |
1377 | .poll = datagram_poll, | |
1378 | .ioctl = nr_ioctl, | |
1379 | .listen = nr_listen, | |
1380 | .shutdown = sock_no_shutdown, | |
1381 | .setsockopt = nr_setsockopt, | |
1382 | .getsockopt = nr_getsockopt, | |
1383 | .sendmsg = nr_sendmsg, | |
1384 | .recvmsg = nr_recvmsg, | |
1385 | .mmap = sock_no_mmap, | |
1386 | .sendpage = sock_no_sendpage, | |
1387 | }; | |
1388 | ||
1389 | static struct notifier_block nr_dev_notifier = { | |
1390 | .notifier_call = nr_device_event, | |
1391 | }; | |
1392 | ||
1393 | static struct net_device **dev_nr; | |
1394 | ||
8d5cf596 RB |
1395 | static struct ax25_protocol nr_pid = { |
1396 | .pid = AX25_P_NETROM, | |
1397 | .func = nr_route_frame | |
1398 | }; | |
1399 | ||
a4282717 RB |
1400 | static struct ax25_linkfail nr_linkfail_notifier = { |
1401 | .func = nr_link_failed, | |
1402 | }; | |
1403 | ||
1da177e4 LT |
1404 | static int __init nr_proto_init(void) |
1405 | { | |
1406 | int i; | |
1407 | int rc = proto_register(&nr_proto, 0); | |
1408 | ||
1409 | if (rc != 0) | |
1410 | goto out; | |
1411 | ||
1412 | if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) { | |
1413 | printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n"); | |
1414 | return -1; | |
1415 | } | |
1416 | ||
1b30dd35 | 1417 | dev_nr = kzalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL); |
1da177e4 LT |
1418 | if (dev_nr == NULL) { |
1419 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n"); | |
1420 | return -1; | |
1421 | } | |
1422 | ||
1da177e4 LT |
1423 | for (i = 0; i < nr_ndevs; i++) { |
1424 | char name[IFNAMSIZ]; | |
1425 | struct net_device *dev; | |
1426 | ||
1427 | sprintf(name, "nr%d", i); | |
b51414b6 | 1428 | dev = alloc_netdev(0, name, nr_setup); |
1da177e4 LT |
1429 | if (!dev) { |
1430 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n"); | |
1431 | goto fail; | |
1432 | } | |
5f8f59d6 | 1433 | |
1da177e4 LT |
1434 | dev->base_addr = i; |
1435 | if (register_netdev(dev)) { | |
1436 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n"); | |
1437 | free_netdev(dev); | |
1438 | goto fail; | |
1439 | } | |
c773e847 | 1440 | nr_set_lockdep_key(dev); |
1da177e4 LT |
1441 | dev_nr[i] = dev; |
1442 | } | |
1443 | ||
1444 | if (sock_register(&nr_family_ops)) { | |
1445 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n"); | |
1446 | goto fail; | |
1447 | } | |
5f8f59d6 | 1448 | |
1da177e4 | 1449 | register_netdevice_notifier(&nr_dev_notifier); |
1da177e4 | 1450 | |
8d5cf596 | 1451 | ax25_register_pid(&nr_pid); |
a4282717 | 1452 | ax25_linkfail_register(&nr_linkfail_notifier); |
1da177e4 LT |
1453 | |
1454 | #ifdef CONFIG_SYSCTL | |
1455 | nr_register_sysctl(); | |
1456 | #endif | |
1457 | ||
1458 | nr_loopback_init(); | |
1459 | ||
457c4cbc EB |
1460 | proc_net_fops_create(&init_net, "nr", S_IRUGO, &nr_info_fops); |
1461 | proc_net_fops_create(&init_net, "nr_neigh", S_IRUGO, &nr_neigh_fops); | |
1462 | proc_net_fops_create(&init_net, "nr_nodes", S_IRUGO, &nr_nodes_fops); | |
1da177e4 LT |
1463 | out: |
1464 | return rc; | |
1465 | fail: | |
1466 | while (--i >= 0) { | |
1467 | unregister_netdev(dev_nr[i]); | |
1468 | free_netdev(dev_nr[i]); | |
1469 | } | |
1470 | kfree(dev_nr); | |
1471 | proto_unregister(&nr_proto); | |
1472 | rc = -1; | |
1473 | goto out; | |
1474 | } | |
1475 | ||
1476 | module_init(nr_proto_init); | |
1477 | ||
1478 | module_param(nr_ndevs, int, 0); | |
1479 | MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices"); | |
1480 | ||
1481 | MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); | |
1482 | MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol"); | |
1483 | MODULE_LICENSE("GPL"); | |
1484 | MODULE_ALIAS_NETPROTO(PF_NETROM); | |
1485 | ||
1486 | static void __exit nr_exit(void) | |
1487 | { | |
1488 | int i; | |
1489 | ||
457c4cbc EB |
1490 | proc_net_remove(&init_net, "nr"); |
1491 | proc_net_remove(&init_net, "nr_neigh"); | |
1492 | proc_net_remove(&init_net, "nr_nodes"); | |
1da177e4 LT |
1493 | nr_loopback_clear(); |
1494 | ||
1495 | nr_rt_free(); | |
1496 | ||
1497 | #ifdef CONFIG_SYSCTL | |
1498 | nr_unregister_sysctl(); | |
1499 | #endif | |
1500 | ||
a4282717 | 1501 | ax25_linkfail_release(&nr_linkfail_notifier); |
1da177e4 LT |
1502 | ax25_protocol_release(AX25_P_NETROM); |
1503 | ||
1504 | unregister_netdevice_notifier(&nr_dev_notifier); | |
1505 | ||
1506 | sock_unregister(PF_NETROM); | |
1507 | ||
1508 | for (i = 0; i < nr_ndevs; i++) { | |
1509 | struct net_device *dev = dev_nr[i]; | |
1510 | if (dev) { | |
1511 | unregister_netdev(dev); | |
1512 | free_netdev(dev); | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | kfree(dev_nr); | |
1517 | proto_unregister(&nr_proto); | |
1518 | } | |
1519 | module_exit(nr_exit); |