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Merge branch 'perfcounters-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux...
[linux-2.6/mini2440.git] / net / rose / af_rose.c
blobe5f478ca3d61574e01bc74bad58cfdc910a33b4a
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 (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
8 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
9 * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
10 * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
11 */
12
13 #include <linux/capability.h>
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/init.h>
17 #include <linux/errno.h>
18 #include <linux/types.h>
19 #include <linux/socket.h>
20 #include <linux/in.h>
21 #include <linux/kernel.h>
22 #include <linux/sched.h>
23 #include <linux/spinlock.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/stat.h>
29 #include <net/net_namespace.h>
30 #include <net/ax25.h>
31 #include <linux/inet.h>
32 #include <linux/netdevice.h>
33 #include <linux/if_arp.h>
34 #include <linux/skbuff.h>
35 #include <net/sock.h>
36 #include <asm/system.h>
37 #include <asm/uaccess.h>
38 #include <linux/fcntl.h>
39 #include <linux/termios.h>
40 #include <linux/mm.h>
41 #include <linux/interrupt.h>
42 #include <linux/notifier.h>
43 #include <net/rose.h>
44 #include <linux/proc_fs.h>
45 #include <linux/seq_file.h>
46 #include <net/tcp_states.h>
47 #include <net/ip.h>
48 #include <net/arp.h>
49
50 static int rose_ndevs = 10;
51
52 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
53 int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
54 int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
55 int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
56 int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
57 int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
58 int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
59 int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
60 int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
61 int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
62
63 static HLIST_HEAD(rose_list);
64 static DEFINE_SPINLOCK(rose_list_lock);
65
66 static struct proto_ops rose_proto_ops;
67
68 ax25_address rose_callsign;
69
70 /*
71 * ROSE network devices are virtual network devices encapsulating ROSE
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 rose_netdev_xmit_lock_key;
77 static struct lock_class_key rose_netdev_addr_lock_key;
78
79 static void rose_set_lockdep_one(struct net_device *dev,
80 struct netdev_queue *txq,
81 void *_unused)
82 {
83 lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
84 }
85
86 static void rose_set_lockdep_key(struct net_device *dev)
87 {
88 lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
89 netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
90 }
91
92 /*
93 * Convert a ROSE address into text.
94 */
95 char *rose2asc(char *buf, const rose_address *addr)
96 {
97 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
98 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
99 addr->rose_addr[4] == 0x00) {
100 strcpy(buf, "*");
101 } else {
102 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
103 addr->rose_addr[1] & 0xFF,
104 addr->rose_addr[2] & 0xFF,
105 addr->rose_addr[3] & 0xFF,
106 addr->rose_addr[4] & 0xFF);
107 }
108
109 return buf;
110 }
111
112 /*
113 * Compare two ROSE addresses, 0 == equal.
114 */
115 int rosecmp(rose_address *addr1, rose_address *addr2)
116 {
117 int i;
118
119 for (i = 0; i < 5; i++)
120 if (addr1->rose_addr[i] != addr2->rose_addr[i])
121 return 1;
122
123 return 0;
124 }
125
126 /*
127 * Compare two ROSE addresses for only mask digits, 0 == equal.
128 */
129 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
130 {
131 unsigned int i, j;
132
133 if (mask > 10)
134 return 1;
135
136 for (i = 0; i < mask; i++) {
137 j = i / 2;
138
139 if ((i % 2) != 0) {
140 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
141 return 1;
142 } else {
143 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
144 return 1;
145 }
146 }
147
148 return 0;
149 }
150
151 /*
152 * Socket removal during an interrupt is now safe.
153 */
154 static void rose_remove_socket(struct sock *sk)
155 {
156 spin_lock_bh(&rose_list_lock);
157 sk_del_node_init(sk);
158 spin_unlock_bh(&rose_list_lock);
159 }
160
161 /*
162 * Kill all bound sockets on a broken link layer connection to a
163 * particular neighbour.
164 */
165 void rose_kill_by_neigh(struct rose_neigh *neigh)
166 {
167 struct sock *s;
168 struct hlist_node *node;
169
170 spin_lock_bh(&rose_list_lock);
171 sk_for_each(s, node, &rose_list) {
172 struct rose_sock *rose = rose_sk(s);
173
174 if (rose->neighbour == neigh) {
175 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
176 rose->neighbour->use--;
177 rose->neighbour = NULL;
178 }
179 }
180 spin_unlock_bh(&rose_list_lock);
181 }
182
183 /*
184 * Kill all bound sockets on a dropped device.
185 */
186 static void rose_kill_by_device(struct net_device *dev)
187 {
188 struct sock *s;
189 struct hlist_node *node;
190
191 spin_lock_bh(&rose_list_lock);
192 sk_for_each(s, node, &rose_list) {
193 struct rose_sock *rose = rose_sk(s);
194
195 if (rose->device == dev) {
196 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
197 rose->neighbour->use--;
198 rose->device = NULL;
199 }
200 }
201 spin_unlock_bh(&rose_list_lock);
202 }
203
204 /*
205 * Handle device status changes.
206 */
207 static int rose_device_event(struct notifier_block *this, unsigned long event,
208 void *ptr)
209 {
210 struct net_device *dev = (struct net_device *)ptr;
211
212 if (!net_eq(dev_net(dev), &init_net))
213 return NOTIFY_DONE;
214
215 if (event != NETDEV_DOWN)
216 return NOTIFY_DONE;
217
218 switch (dev->type) {
219 case ARPHRD_ROSE:
220 rose_kill_by_device(dev);
221 break;
222 case ARPHRD_AX25:
223 rose_link_device_down(dev);
224 rose_rt_device_down(dev);
225 break;
226 }
227
228 return NOTIFY_DONE;
229 }
230
231 /*
232 * Add a socket to the bound sockets list.
233 */
234 static void rose_insert_socket(struct sock *sk)
235 {
236
237 spin_lock_bh(&rose_list_lock);
238 sk_add_node(sk, &rose_list);
239 spin_unlock_bh(&rose_list_lock);
240 }
241
242 /*
243 * Find a socket that wants to accept the Call Request we just
244 * received.
245 */
246 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
247 {
248 struct sock *s;
249 struct hlist_node *node;
250
251 spin_lock_bh(&rose_list_lock);
252 sk_for_each(s, node, &rose_list) {
253 struct rose_sock *rose = rose_sk(s);
254
255 if (!rosecmp(&rose->source_addr, addr) &&
256 !ax25cmp(&rose->source_call, call) &&
257 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
258 goto found;
259 }
260
261 sk_for_each(s, node, &rose_list) {
262 struct rose_sock *rose = rose_sk(s);
263
264 if (!rosecmp(&rose->source_addr, addr) &&
265 !ax25cmp(&rose->source_call, &null_ax25_address) &&
266 s->sk_state == TCP_LISTEN)
267 goto found;
268 }
269 s = NULL;
270 found:
271 spin_unlock_bh(&rose_list_lock);
272 return s;
273 }
274
275 /*
276 * Find a connected ROSE socket given my LCI and device.
277 */
278 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
279 {
280 struct sock *s;
281 struct hlist_node *node;
282
283 spin_lock_bh(&rose_list_lock);
284 sk_for_each(s, node, &rose_list) {
285 struct rose_sock *rose = rose_sk(s);
286
287 if (rose->lci == lci && rose->neighbour == neigh)
288 goto found;
289 }
290 s = NULL;
291 found:
292 spin_unlock_bh(&rose_list_lock);
293 return s;
294 }
295
296 /*
297 * Find a unique LCI for a given device.
298 */
299 unsigned int rose_new_lci(struct rose_neigh *neigh)
300 {
301 int lci;
302
303 if (neigh->dce_mode) {
304 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
305 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
306 return lci;
307 } else {
308 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
309 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
310 return lci;
311 }
312
313 return 0;
314 }
315
316 /*
317 * Deferred destroy.
318 */
319 void rose_destroy_socket(struct sock *);
320
321 /*
322 * Handler for deferred kills.
323 */
324 static void rose_destroy_timer(unsigned long data)
325 {
326 rose_destroy_socket((struct sock *)data);
327 }
328
329 /*
330 * This is called from user mode and the timers. Thus it protects itself
331 * against interrupt users but doesn't worry about being called during
332 * work. Once it is removed from the queue no interrupt or bottom half
333 * will touch it and we are (fairly 8-) ) safe.
334 */
335 void rose_destroy_socket(struct sock *sk)
336 {
337 struct sk_buff *skb;
338
339 rose_remove_socket(sk);
340 rose_stop_heartbeat(sk);
341 rose_stop_idletimer(sk);
342 rose_stop_timer(sk);
343
344 rose_clear_queues(sk); /* Flush the queues */
345
346 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
347 if (skb->sk != sk) { /* A pending connection */
348 /* Queue the unaccepted socket for death */
349 sock_set_flag(skb->sk, SOCK_DEAD);
350 rose_start_heartbeat(skb->sk);
351 rose_sk(skb->sk)->state = ROSE_STATE_0;
352 }
353
354 kfree_skb(skb);
355 }
356
357 if (sk_has_allocations(sk)) {
358 /* Defer: outstanding buffers */
359 setup_timer(&sk->sk_timer, rose_destroy_timer,
360 (unsigned long)sk);
361 sk->sk_timer.expires = jiffies + 10 * HZ;
362 add_timer(&sk->sk_timer);
363 } else
364 sock_put(sk);
365 }
366
367 /*
368 * Handling for system calls applied via the various interfaces to a
369 * ROSE socket object.
370 */
371
372 static int rose_setsockopt(struct socket *sock, int level, int optname,
373 char __user *optval, int optlen)
374 {
375 struct sock *sk = sock->sk;
376 struct rose_sock *rose = rose_sk(sk);
377 int opt;
378
379 if (level != SOL_ROSE)
380 return -ENOPROTOOPT;
381
382 if (optlen < sizeof(int))
383 return -EINVAL;
384
385 if (get_user(opt, (int __user *)optval))
386 return -EFAULT;
387
388 switch (optname) {
389 case ROSE_DEFER:
390 rose->defer = opt ? 1 : 0;
391 return 0;
392
393 case ROSE_T1:
394 if (opt < 1)
395 return -EINVAL;
396 rose->t1 = opt * HZ;
397 return 0;
398
399 case ROSE_T2:
400 if (opt < 1)
401 return -EINVAL;
402 rose->t2 = opt * HZ;
403 return 0;
404
405 case ROSE_T3:
406 if (opt < 1)
407 return -EINVAL;
408 rose->t3 = opt * HZ;
409 return 0;
410
411 case ROSE_HOLDBACK:
412 if (opt < 1)
413 return -EINVAL;
414 rose->hb = opt * HZ;
415 return 0;
416
417 case ROSE_IDLE:
418 if (opt < 0)
419 return -EINVAL;
420 rose->idle = opt * 60 * HZ;
421 return 0;
422
423 case ROSE_QBITINCL:
424 rose->qbitincl = opt ? 1 : 0;
425 return 0;
426
427 default:
428 return -ENOPROTOOPT;
429 }
430 }
431
432 static int rose_getsockopt(struct socket *sock, int level, int optname,
433 char __user *optval, int __user *optlen)
434 {
435 struct sock *sk = sock->sk;
436 struct rose_sock *rose = rose_sk(sk);
437 int val = 0;
438 int len;
439
440 if (level != SOL_ROSE)
441 return -ENOPROTOOPT;
442
443 if (get_user(len, optlen))
444 return -EFAULT;
445
446 if (len < 0)
447 return -EINVAL;
448
449 switch (optname) {
450 case ROSE_DEFER:
451 val = rose->defer;
452 break;
453
454 case ROSE_T1:
455 val = rose->t1 / HZ;
456 break;
457
458 case ROSE_T2:
459 val = rose->t2 / HZ;
460 break;
461
462 case ROSE_T3:
463 val = rose->t3 / HZ;
464 break;
465
466 case ROSE_HOLDBACK:
467 val = rose->hb / HZ;
468 break;
469
470 case ROSE_IDLE:
471 val = rose->idle / (60 * HZ);
472 break;
473
474 case ROSE_QBITINCL:
475 val = rose->qbitincl;
476 break;
477
478 default:
479 return -ENOPROTOOPT;
480 }
481
482 len = min_t(unsigned int, len, sizeof(int));
483
484 if (put_user(len, optlen))
485 return -EFAULT;
486
487 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
488 }
489
490 static int rose_listen(struct socket *sock, int backlog)
491 {
492 struct sock *sk = sock->sk;
493
494 if (sk->sk_state != TCP_LISTEN) {
495 struct rose_sock *rose = rose_sk(sk);
496
497 rose->dest_ndigis = 0;
498 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
499 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
500 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
501 sk->sk_max_ack_backlog = backlog;
502 sk->sk_state = TCP_LISTEN;
503 return 0;
504 }
505
506 return -EOPNOTSUPP;
507 }
508
509 static struct proto rose_proto = {
510 .name = "ROSE",
511 .owner = THIS_MODULE,
512 .obj_size = sizeof(struct rose_sock),
513 };
514
515 static int rose_create(struct net *net, struct socket *sock, int protocol)
516 {
517 struct sock *sk;
518 struct rose_sock *rose;
519
520 if (net != &init_net)
521 return -EAFNOSUPPORT;
522
523 if (sock->type != SOCK_SEQPACKET || protocol != 0)
524 return -ESOCKTNOSUPPORT;
525
526 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
527 if (sk == NULL)
528 return -ENOMEM;
529
530 rose = rose_sk(sk);
531
532 sock_init_data(sock, sk);
533
534 skb_queue_head_init(&rose->ack_queue);
535 #ifdef M_BIT
536 skb_queue_head_init(&rose->frag_queue);
537 rose->fraglen = 0;
538 #endif
539
540 sock->ops = &rose_proto_ops;
541 sk->sk_protocol = protocol;
542
543 init_timer(&rose->timer);
544 init_timer(&rose->idletimer);
545
546 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
547 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
548 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
549 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
550 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
551
552 rose->state = ROSE_STATE_0;
553
554 return 0;
555 }
556
557 static struct sock *rose_make_new(struct sock *osk)
558 {
559 struct sock *sk;
560 struct rose_sock *rose, *orose;
561
562 if (osk->sk_type != SOCK_SEQPACKET)
563 return NULL;
564
565 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto);
566 if (sk == NULL)
567 return NULL;
568
569 rose = rose_sk(sk);
570
571 sock_init_data(NULL, sk);
572
573 skb_queue_head_init(&rose->ack_queue);
574 #ifdef M_BIT
575 skb_queue_head_init(&rose->frag_queue);
576 rose->fraglen = 0;
577 #endif
578
579 sk->sk_type = osk->sk_type;
580 sk->sk_priority = osk->sk_priority;
581 sk->sk_protocol = osk->sk_protocol;
582 sk->sk_rcvbuf = osk->sk_rcvbuf;
583 sk->sk_sndbuf = osk->sk_sndbuf;
584 sk->sk_state = TCP_ESTABLISHED;
585 sock_copy_flags(sk, osk);
586
587 init_timer(&rose->timer);
588 init_timer(&rose->idletimer);
589
590 orose = rose_sk(osk);
591 rose->t1 = orose->t1;
592 rose->t2 = orose->t2;
593 rose->t3 = orose->t3;
594 rose->hb = orose->hb;
595 rose->idle = orose->idle;
596 rose->defer = orose->defer;
597 rose->device = orose->device;
598 rose->qbitincl = orose->qbitincl;
599
600 return sk;
601 }
602
603 static int rose_release(struct socket *sock)
604 {
605 struct sock *sk = sock->sk;
606 struct rose_sock *rose;
607
608 if (sk == NULL) return 0;
609
610 sock_hold(sk);
611 sock_orphan(sk);
612 lock_sock(sk);
613 rose = rose_sk(sk);
614
615 switch (rose->state) {
616 case ROSE_STATE_0:
617 release_sock(sk);
618 rose_disconnect(sk, 0, -1, -1);
619 lock_sock(sk);
620 rose_destroy_socket(sk);
621 break;
622
623 case ROSE_STATE_2:
624 rose->neighbour->use--;
625 release_sock(sk);
626 rose_disconnect(sk, 0, -1, -1);
627 lock_sock(sk);
628 rose_destroy_socket(sk);
629 break;
630
631 case ROSE_STATE_1:
632 case ROSE_STATE_3:
633 case ROSE_STATE_4:
634 case ROSE_STATE_5:
635 rose_clear_queues(sk);
636 rose_stop_idletimer(sk);
637 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
638 rose_start_t3timer(sk);
639 rose->state = ROSE_STATE_2;
640 sk->sk_state = TCP_CLOSE;
641 sk->sk_shutdown |= SEND_SHUTDOWN;
642 sk->sk_state_change(sk);
643 sock_set_flag(sk, SOCK_DEAD);
644 sock_set_flag(sk, SOCK_DESTROY);
645 break;
646
647 default:
648 break;
649 }
650
651 sock->sk = NULL;
652 release_sock(sk);
653 sock_put(sk);
654
655 return 0;
656 }
657
658 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
659 {
660 struct sock *sk = sock->sk;
661 struct rose_sock *rose = rose_sk(sk);
662 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
663 struct net_device *dev;
664 ax25_address *source;
665 ax25_uid_assoc *user;
666 int n;
667
668 if (!sock_flag(sk, SOCK_ZAPPED))
669 return -EINVAL;
670
671 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
672 return -EINVAL;
673
674 if (addr->srose_family != AF_ROSE)
675 return -EINVAL;
676
677 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
678 return -EINVAL;
679
680 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
681 return -EINVAL;
682
683 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
684 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
685 return -EADDRNOTAVAIL;
686 }
687
688 source = &addr->srose_call;
689
690 user = ax25_findbyuid(current_euid());
691 if (user) {
692 rose->source_call = user->call;
693 ax25_uid_put(user);
694 } else {
695 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
696 return -EACCES;
697 rose->source_call = *source;
698 }
699
700 rose->source_addr = addr->srose_addr;
701 rose->device = dev;
702 rose->source_ndigis = addr->srose_ndigis;
703
704 if (addr_len == sizeof(struct full_sockaddr_rose)) {
705 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
706 for (n = 0 ; n < addr->srose_ndigis ; n++)
707 rose->source_digis[n] = full_addr->srose_digis[n];
708 } else {
709 if (rose->source_ndigis == 1) {
710 rose->source_digis[0] = addr->srose_digi;
711 }
712 }
713
714 rose_insert_socket(sk);
715
716 sock_reset_flag(sk, SOCK_ZAPPED);
717 SOCK_DEBUG(sk, "ROSE: socket is bound\n");
718 return 0;
719 }
720
721 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
722 {
723 struct sock *sk = sock->sk;
724 struct rose_sock *rose = rose_sk(sk);
725 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
726 unsigned char cause, diagnostic;
727 struct net_device *dev;
728 ax25_uid_assoc *user;
729 int n, err = 0;
730
731 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
732 return -EINVAL;
733
734 if (addr->srose_family != AF_ROSE)
735 return -EINVAL;
736
737 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
738 return -EINVAL;
739
740 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
741 return -EINVAL;
742
743 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
744 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
745 return -EINVAL;
746
747 lock_sock(sk);
748
749 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
750 /* Connect completed during a ERESTARTSYS event */
751 sock->state = SS_CONNECTED;
752 goto out_release;
753 }
754
755 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
756 sock->state = SS_UNCONNECTED;
757 err = -ECONNREFUSED;
758 goto out_release;
759 }
760
761 if (sk->sk_state == TCP_ESTABLISHED) {
762 /* No reconnect on a seqpacket socket */
763 err = -EISCONN;
764 goto out_release;
765 }
766
767 sk->sk_state = TCP_CLOSE;
768 sock->state = SS_UNCONNECTED;
769
770 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
771 &diagnostic, 0);
772 if (!rose->neighbour) {
773 err = -ENETUNREACH;
774 goto out_release;
775 }
776
777 rose->lci = rose_new_lci(rose->neighbour);
778 if (!rose->lci) {
779 err = -ENETUNREACH;
780 goto out_release;
781 }
782
783 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
784 sock_reset_flag(sk, SOCK_ZAPPED);
785
786 if ((dev = rose_dev_first()) == NULL) {
787 err = -ENETUNREACH;
788 goto out_release;
789 }
790
791 user = ax25_findbyuid(current_euid());
792 if (!user) {
793 err = -EINVAL;
794 goto out_release;
795 }
796
797 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
798 rose->source_call = user->call;
799 rose->device = dev;
800 ax25_uid_put(user);
801
802 rose_insert_socket(sk); /* Finish the bind */
803 }
804 rose_try_next_neigh:
805 rose->dest_addr = addr->srose_addr;
806 rose->dest_call = addr->srose_call;
807 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
808 rose->dest_ndigis = addr->srose_ndigis;
809
810 if (addr_len == sizeof(struct full_sockaddr_rose)) {
811 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
812 for (n = 0 ; n < addr->srose_ndigis ; n++)
813 rose->dest_digis[n] = full_addr->srose_digis[n];
814 } else {
815 if (rose->dest_ndigis == 1) {
816 rose->dest_digis[0] = addr->srose_digi;
817 }
818 }
819
820 /* Move to connecting socket, start sending Connect Requests */
821 sock->state = SS_CONNECTING;
822 sk->sk_state = TCP_SYN_SENT;
823
824 rose->state = ROSE_STATE_1;
825
826 rose->neighbour->use++;
827
828 rose_write_internal(sk, ROSE_CALL_REQUEST);
829 rose_start_heartbeat(sk);
830 rose_start_t1timer(sk);
831
832 /* Now the loop */
833 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
834 err = -EINPROGRESS;
835 goto out_release;
836 }
837
838 /*
839 * A Connect Ack with Choke or timeout or failed routing will go to
840 * closed.
841 */
842 if (sk->sk_state == TCP_SYN_SENT) {
843 DEFINE_WAIT(wait);
844
845 for (;;) {
846 prepare_to_wait(sk->sk_sleep, &wait,
847 TASK_INTERRUPTIBLE);
848 if (sk->sk_state != TCP_SYN_SENT)
849 break;
850 if (!signal_pending(current)) {
851 release_sock(sk);
852 schedule();
853 lock_sock(sk);
854 continue;
855 }
856 err = -ERESTARTSYS;
857 break;
858 }
859 finish_wait(sk->sk_sleep, &wait);
860
861 if (err)
862 goto out_release;
863 }
864
865 if (sk->sk_state != TCP_ESTABLISHED) {
866 /* Try next neighbour */
867 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic, 0);
868 if (rose->neighbour)
869 goto rose_try_next_neigh;
870
871 /* No more neighbours */
872 sock->state = SS_UNCONNECTED;
873 err = sock_error(sk); /* Always set at this point */
874 goto out_release;
875 }
876
877 sock->state = SS_CONNECTED;
878
879 out_release:
880 release_sock(sk);
881
882 return err;
883 }
884
885 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
886 {
887 struct sk_buff *skb;
888 struct sock *newsk;
889 DEFINE_WAIT(wait);
890 struct sock *sk;
891 int err = 0;
892
893 if ((sk = sock->sk) == NULL)
894 return -EINVAL;
895
896 lock_sock(sk);
897 if (sk->sk_type != SOCK_SEQPACKET) {
898 err = -EOPNOTSUPP;
899 goto out_release;
900 }
901
902 if (sk->sk_state != TCP_LISTEN) {
903 err = -EINVAL;
904 goto out_release;
905 }
906
907 /*
908 * The write queue this time is holding sockets ready to use
909 * hooked into the SABM we saved
910 */
911 for (;;) {
912 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
913
914 skb = skb_dequeue(&sk->sk_receive_queue);
915 if (skb)
916 break;
917
918 if (flags & O_NONBLOCK) {
919 err = -EWOULDBLOCK;
920 break;
921 }
922 if (!signal_pending(current)) {
923 release_sock(sk);
924 schedule();
925 lock_sock(sk);
926 continue;
927 }
928 err = -ERESTARTSYS;
929 break;
930 }
931 finish_wait(sk->sk_sleep, &wait);
932 if (err)
933 goto out_release;
934
935 newsk = skb->sk;
936 sock_graft(newsk, newsock);
937
938 /* Now attach up the new socket */
939 skb->sk = NULL;
940 kfree_skb(skb);
941 sk->sk_ack_backlog--;
942
943 out_release:
944 release_sock(sk);
945
946 return err;
947 }
948
949 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
950 int *uaddr_len, int peer)
951 {
952 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
953 struct sock *sk = sock->sk;
954 struct rose_sock *rose = rose_sk(sk);
955 int n;
956
957 memset(srose, 0, sizeof(*srose));
958 if (peer != 0) {
959 if (sk->sk_state != TCP_ESTABLISHED)
960 return -ENOTCONN;
961 srose->srose_family = AF_ROSE;
962 srose->srose_addr = rose->dest_addr;
963 srose->srose_call = rose->dest_call;
964 srose->srose_ndigis = rose->dest_ndigis;
965 for (n = 0; n < rose->dest_ndigis; n++)
966 srose->srose_digis[n] = rose->dest_digis[n];
967 } else {
968 srose->srose_family = AF_ROSE;
969 srose->srose_addr = rose->source_addr;
970 srose->srose_call = rose->source_call;
971 srose->srose_ndigis = rose->source_ndigis;
972 for (n = 0; n < rose->source_ndigis; n++)
973 srose->srose_digis[n] = rose->source_digis[n];
974 }
975
976 *uaddr_len = sizeof(struct full_sockaddr_rose);
977 return 0;
978 }
979
980 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
981 {
982 struct sock *sk;
983 struct sock *make;
984 struct rose_sock *make_rose;
985 struct rose_facilities_struct facilities;
986 int n, len;
987
988 skb->sk = NULL; /* Initially we don't know who it's for */
989
990 /*
991 * skb->data points to the rose frame start
992 */
993 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
994
995 len = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
996 len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
997 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
998 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
999 return 0;
1000 }
1001
1002 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1003
1004 /*
1005 * We can't accept the Call Request.
1006 */
1007 if (sk == NULL || sk_acceptq_is_full(sk) ||
1008 (make = rose_make_new(sk)) == NULL) {
1009 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1010 return 0;
1011 }
1012
1013 skb->sk = make;
1014 make->sk_state = TCP_ESTABLISHED;
1015 make_rose = rose_sk(make);
1016
1017 make_rose->lci = lci;
1018 make_rose->dest_addr = facilities.dest_addr;
1019 make_rose->dest_call = facilities.dest_call;
1020 make_rose->dest_ndigis = facilities.dest_ndigis;
1021 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1022 make_rose->dest_digis[n] = facilities.dest_digis[n];
1023 make_rose->source_addr = facilities.source_addr;
1024 make_rose->source_call = facilities.source_call;
1025 make_rose->source_ndigis = facilities.source_ndigis;
1026 for (n = 0 ; n < facilities.source_ndigis ; n++)
1027 make_rose->source_digis[n]= facilities.source_digis[n];
1028 make_rose->neighbour = neigh;
1029 make_rose->device = dev;
1030 make_rose->facilities = facilities;
1031
1032 make_rose->neighbour->use++;
1033
1034 if (rose_sk(sk)->defer) {
1035 make_rose->state = ROSE_STATE_5;
1036 } else {
1037 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1038 make_rose->state = ROSE_STATE_3;
1039 rose_start_idletimer(make);
1040 }
1041
1042 make_rose->condition = 0x00;
1043 make_rose->vs = 0;
1044 make_rose->va = 0;
1045 make_rose->vr = 0;
1046 make_rose->vl = 0;
1047 sk->sk_ack_backlog++;
1048
1049 rose_insert_socket(make);
1050
1051 skb_queue_head(&sk->sk_receive_queue, skb);
1052
1053 rose_start_heartbeat(make);
1054
1055 if (!sock_flag(sk, SOCK_DEAD))
1056 sk->sk_data_ready(sk, skb->len);
1057
1058 return 1;
1059 }
1060
1061 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1062 struct msghdr *msg, size_t len)
1063 {
1064 struct sock *sk = sock->sk;
1065 struct rose_sock *rose = rose_sk(sk);
1066 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1067 int err;
1068 struct full_sockaddr_rose srose;
1069 struct sk_buff *skb;
1070 unsigned char *asmptr;
1071 int n, size, qbit = 0;
1072
1073 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1074 return -EINVAL;
1075
1076 if (sock_flag(sk, SOCK_ZAPPED))
1077 return -EADDRNOTAVAIL;
1078
1079 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1080 send_sig(SIGPIPE, current, 0);
1081 return -EPIPE;
1082 }
1083
1084 if (rose->neighbour == NULL || rose->device == NULL)
1085 return -ENETUNREACH;
1086
1087 if (usrose != NULL) {
1088 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1089 return -EINVAL;
1090 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1091 memcpy(&srose, usrose, msg->msg_namelen);
1092 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1093 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1094 return -EISCONN;
1095 if (srose.srose_ndigis != rose->dest_ndigis)
1096 return -EISCONN;
1097 if (srose.srose_ndigis == rose->dest_ndigis) {
1098 for (n = 0 ; n < srose.srose_ndigis ; n++)
1099 if (ax25cmp(&rose->dest_digis[n],
1100 &srose.srose_digis[n]))
1101 return -EISCONN;
1102 }
1103 if (srose.srose_family != AF_ROSE)
1104 return -EINVAL;
1105 } else {
1106 if (sk->sk_state != TCP_ESTABLISHED)
1107 return -ENOTCONN;
1108
1109 srose.srose_family = AF_ROSE;
1110 srose.srose_addr = rose->dest_addr;
1111 srose.srose_call = rose->dest_call;
1112 srose.srose_ndigis = rose->dest_ndigis;
1113 for (n = 0 ; n < rose->dest_ndigis ; n++)
1114 srose.srose_digis[n] = rose->dest_digis[n];
1115 }
1116
1117 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1118
1119 /* Build a packet */
1120 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1121 /* Sanity check the packet size */
1122 if (len > 65535)
1123 return -EMSGSIZE;
1124
1125 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1126
1127 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1128 return err;
1129
1130 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1131
1132 /*
1133 * Put the data on the end
1134 */
1135 SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1136
1137 skb_reset_transport_header(skb);
1138 skb_put(skb, len);
1139
1140 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1141 if (err) {
1142 kfree_skb(skb);
1143 return err;
1144 }
1145
1146 /*
1147 * If the Q BIT Include socket option is in force, the first
1148 * byte of the user data is the logical value of the Q Bit.
1149 */
1150 if (rose->qbitincl) {
1151 qbit = skb->data[0];
1152 skb_pull(skb, 1);
1153 }
1154
1155 /*
1156 * Push down the ROSE header
1157 */
1158 asmptr = skb_push(skb, ROSE_MIN_LEN);
1159
1160 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1161
1162 /* Build a ROSE Network header */
1163 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1164 asmptr[1] = (rose->lci >> 0) & 0xFF;
1165 asmptr[2] = ROSE_DATA;
1166
1167 if (qbit)
1168 asmptr[0] |= ROSE_Q_BIT;
1169
1170 SOCK_DEBUG(sk, "ROSE: Built header.\n");
1171
1172 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1173
1174 if (sk->sk_state != TCP_ESTABLISHED) {
1175 kfree_skb(skb);
1176 return -ENOTCONN;
1177 }
1178
1179 #ifdef M_BIT
1180 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1181 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1182 unsigned char header[ROSE_MIN_LEN];
1183 struct sk_buff *skbn;
1184 int frontlen;
1185 int lg;
1186
1187 /* Save a copy of the Header */
1188 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1189 skb_pull(skb, ROSE_MIN_LEN);
1190
1191 frontlen = skb_headroom(skb);
1192
1193 while (skb->len > 0) {
1194 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1195 kfree_skb(skb);
1196 return err;
1197 }
1198
1199 skbn->sk = sk;
1200 skbn->free = 1;
1201 skbn->arp = 1;
1202
1203 skb_reserve(skbn, frontlen);
1204
1205 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1206
1207 /* Copy the user data */
1208 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1209 skb_pull(skb, lg);
1210
1211 /* Duplicate the Header */
1212 skb_push(skbn, ROSE_MIN_LEN);
1213 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1214
1215 if (skb->len > 0)
1216 skbn->data[2] |= M_BIT;
1217
1218 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1219 }
1220
1221 skb->free = 1;
1222 kfree_skb(skb);
1223 } else {
1224 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1225 }
1226 #else
1227 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1228 #endif
1229
1230 rose_kick(sk);
1231
1232 return len;
1233 }
1234
1235
1236 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1237 struct msghdr *msg, size_t size, int flags)
1238 {
1239 struct sock *sk = sock->sk;
1240 struct rose_sock *rose = rose_sk(sk);
1241 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1242 size_t copied;
1243 unsigned char *asmptr;
1244 struct sk_buff *skb;
1245 int n, er, qbit;
1246
1247 /*
1248 * This works for seqpacket too. The receiver has ordered the queue for
1249 * us! We do one quick check first though
1250 */
1251 if (sk->sk_state != TCP_ESTABLISHED)
1252 return -ENOTCONN;
1253
1254 /* Now we can treat all alike */
1255 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1256 return er;
1257
1258 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1259
1260 skb_pull(skb, ROSE_MIN_LEN);
1261
1262 if (rose->qbitincl) {
1263 asmptr = skb_push(skb, 1);
1264 *asmptr = qbit;
1265 }
1266
1267 skb_reset_transport_header(skb);
1268 copied = skb->len;
1269
1270 if (copied > size) {
1271 copied = size;
1272 msg->msg_flags |= MSG_TRUNC;
1273 }
1274
1275 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1276
1277 if (srose != NULL) {
1278 srose->srose_family = AF_ROSE;
1279 srose->srose_addr = rose->dest_addr;
1280 srose->srose_call = rose->dest_call;
1281 srose->srose_ndigis = rose->dest_ndigis;
1282 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1283 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1284 for (n = 0 ; n < rose->dest_ndigis ; n++)
1285 full_srose->srose_digis[n] = rose->dest_digis[n];
1286 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1287 } else {
1288 if (rose->dest_ndigis >= 1) {
1289 srose->srose_ndigis = 1;
1290 srose->srose_digi = rose->dest_digis[0];
1291 }
1292 msg->msg_namelen = sizeof(struct sockaddr_rose);
1293 }
1294 }
1295
1296 skb_free_datagram(sk, skb);
1297
1298 return copied;
1299 }
1300
1301
1302 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1303 {
1304 struct sock *sk = sock->sk;
1305 struct rose_sock *rose = rose_sk(sk);
1306 void __user *argp = (void __user *)arg;
1307
1308 switch (cmd) {
1309 case TIOCOUTQ: {
1310 long amount;
1311
1312 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1313 if (amount < 0)
1314 amount = 0;
1315 return put_user(amount, (unsigned int __user *) argp);
1316 }
1317
1318 case TIOCINQ: {
1319 struct sk_buff *skb;
1320 long amount = 0L;
1321 /* These two are safe on a single CPU system as only user tasks fiddle here */
1322 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1323 amount = skb->len;
1324 return put_user(amount, (unsigned int __user *) argp);
1325 }
1326
1327 case SIOCGSTAMP:
1328 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1329
1330 case SIOCGSTAMPNS:
1331 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1332
1333 case SIOCGIFADDR:
1334 case SIOCSIFADDR:
1335 case SIOCGIFDSTADDR:
1336 case SIOCSIFDSTADDR:
1337 case SIOCGIFBRDADDR:
1338 case SIOCSIFBRDADDR:
1339 case SIOCGIFNETMASK:
1340 case SIOCSIFNETMASK:
1341 case SIOCGIFMETRIC:
1342 case SIOCSIFMETRIC:
1343 return -EINVAL;
1344
1345 case SIOCADDRT:
1346 case SIOCDELRT:
1347 case SIOCRSCLRRT:
1348 if (!capable(CAP_NET_ADMIN))
1349 return -EPERM;
1350 return rose_rt_ioctl(cmd, argp);
1351
1352 case SIOCRSGCAUSE: {
1353 struct rose_cause_struct rose_cause;
1354 rose_cause.cause = rose->cause;
1355 rose_cause.diagnostic = rose->diagnostic;
1356 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1357 }
1358
1359 case SIOCRSSCAUSE: {
1360 struct rose_cause_struct rose_cause;
1361 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1362 return -EFAULT;
1363 rose->cause = rose_cause.cause;
1364 rose->diagnostic = rose_cause.diagnostic;
1365 return 0;
1366 }
1367
1368 case SIOCRSSL2CALL:
1369 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1370 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1371 ax25_listen_release(&rose_callsign, NULL);
1372 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1373 return -EFAULT;
1374 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1375 return ax25_listen_register(&rose_callsign, NULL);
1376
1377 return 0;
1378
1379 case SIOCRSGL2CALL:
1380 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1381
1382 case SIOCRSACCEPT:
1383 if (rose->state == ROSE_STATE_5) {
1384 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1385 rose_start_idletimer(sk);
1386 rose->condition = 0x00;
1387 rose->vs = 0;
1388 rose->va = 0;
1389 rose->vr = 0;
1390 rose->vl = 0;
1391 rose->state = ROSE_STATE_3;
1392 }
1393 return 0;
1394
1395 default:
1396 return -ENOIOCTLCMD;
1397 }
1398
1399 return 0;
1400 }
1401
1402 #ifdef CONFIG_PROC_FS
1403 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1404 __acquires(rose_list_lock)
1405 {
1406 int i;
1407 struct sock *s;
1408 struct hlist_node *node;
1409
1410 spin_lock_bh(&rose_list_lock);
1411 if (*pos == 0)
1412 return SEQ_START_TOKEN;
1413
1414 i = 1;
1415 sk_for_each(s, node, &rose_list) {
1416 if (i == *pos)
1417 return s;
1418 ++i;
1419 }
1420 return NULL;
1421 }
1422
1423 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1424 {
1425 ++*pos;
1426
1427 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1428 : sk_next((struct sock *)v);
1429 }
1430
1431 static void rose_info_stop(struct seq_file *seq, void *v)
1432 __releases(rose_list_lock)
1433 {
1434 spin_unlock_bh(&rose_list_lock);
1435 }
1436
1437 static int rose_info_show(struct seq_file *seq, void *v)
1438 {
1439 char buf[11], rsbuf[11];
1440
1441 if (v == SEQ_START_TOKEN)
1442 seq_puts(seq,
1443 "dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode\n");
1444
1445 else {
1446 struct sock *s = v;
1447 struct rose_sock *rose = rose_sk(s);
1448 const char *devname, *callsign;
1449 const struct net_device *dev = rose->device;
1450
1451 if (!dev)
1452 devname = "???";
1453 else
1454 devname = dev->name;
1455
1456 seq_printf(seq, "%-10s %-9s ",
1457 rose2asc(rsbuf, &rose->dest_addr),
1458 ax2asc(buf, &rose->dest_call));
1459
1460 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1461 callsign = "??????-?";
1462 else
1463 callsign = ax2asc(buf, &rose->source_call);
1464
1465 seq_printf(seq,
1466 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1467 rose2asc(rsbuf, &rose->source_addr),
1468 callsign,
1469 devname,
1470 rose->lci & 0x0FFF,
1471 (rose->neighbour) ? rose->neighbour->number : 0,
1472 rose->state,
1473 rose->vs,
1474 rose->vr,
1475 rose->va,
1476 ax25_display_timer(&rose->timer) / HZ,
1477 rose->t1 / HZ,
1478 rose->t2 / HZ,
1479 rose->t3 / HZ,
1480 rose->hb / HZ,
1481 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1482 rose->idle / (60 * HZ),
1483 sk_wmem_alloc_get(s),
1484 sk_rmem_alloc_get(s),
1485 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1486 }
1487
1488 return 0;
1489 }
1490
1491 static const struct seq_operations rose_info_seqops = {
1492 .start = rose_info_start,
1493 .next = rose_info_next,
1494 .stop = rose_info_stop,
1495 .show = rose_info_show,
1496 };
1497
1498 static int rose_info_open(struct inode *inode, struct file *file)
1499 {
1500 return seq_open(file, &rose_info_seqops);
1501 }
1502
1503 static const struct file_operations rose_info_fops = {
1504 .owner = THIS_MODULE,
1505 .open = rose_info_open,
1506 .read = seq_read,
1507 .llseek = seq_lseek,
1508 .release = seq_release,
1509 };
1510 #endif /* CONFIG_PROC_FS */
1511
1512 static struct net_proto_family rose_family_ops = {
1513 .family = PF_ROSE,
1514 .create = rose_create,
1515 .owner = THIS_MODULE,
1516 };
1517
1518 static struct proto_ops rose_proto_ops = {
1519 .family = PF_ROSE,
1520 .owner = THIS_MODULE,
1521 .release = rose_release,
1522 .bind = rose_bind,
1523 .connect = rose_connect,
1524 .socketpair = sock_no_socketpair,
1525 .accept = rose_accept,
1526 .getname = rose_getname,
1527 .poll = datagram_poll,
1528 .ioctl = rose_ioctl,
1529 .listen = rose_listen,
1530 .shutdown = sock_no_shutdown,
1531 .setsockopt = rose_setsockopt,
1532 .getsockopt = rose_getsockopt,
1533 .sendmsg = rose_sendmsg,
1534 .recvmsg = rose_recvmsg,
1535 .mmap = sock_no_mmap,
1536 .sendpage = sock_no_sendpage,
1537 };
1538
1539 static struct notifier_block rose_dev_notifier = {
1540 .notifier_call = rose_device_event,
1541 };
1542
1543 static struct net_device **dev_rose;
1544
1545 static struct ax25_protocol rose_pid = {
1546 .pid = AX25_P_ROSE,
1547 .func = rose_route_frame
1548 };
1549
1550 static struct ax25_linkfail rose_linkfail_notifier = {
1551 .func = rose_link_failed
1552 };
1553
1554 static int __init rose_proto_init(void)
1555 {
1556 int i;
1557 int rc;
1558
1559 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1560 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1561 rc = -EINVAL;
1562 goto out;
1563 }
1564
1565 rc = proto_register(&rose_proto, 0);
1566 if (rc != 0)
1567 goto out;
1568
1569 rose_callsign = null_ax25_address;
1570
1571 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1572 if (dev_rose == NULL) {
1573 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1574 rc = -ENOMEM;
1575 goto out_proto_unregister;
1576 }
1577
1578 for (i = 0; i < rose_ndevs; i++) {
1579 struct net_device *dev;
1580 char name[IFNAMSIZ];
1581
1582 sprintf(name, "rose%d", i);
1583 dev = alloc_netdev(0, name, rose_setup);
1584 if (!dev) {
1585 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1586 rc = -ENOMEM;
1587 goto fail;
1588 }
1589 rc = register_netdev(dev);
1590 if (rc) {
1591 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1592 free_netdev(dev);
1593 goto fail;
1594 }
1595 rose_set_lockdep_key(dev);
1596 dev_rose[i] = dev;
1597 }
1598
1599 sock_register(&rose_family_ops);
1600 register_netdevice_notifier(&rose_dev_notifier);
1601
1602 ax25_register_pid(&rose_pid);
1603 ax25_linkfail_register(&rose_linkfail_notifier);
1604
1605 #ifdef CONFIG_SYSCTL
1606 rose_register_sysctl();
1607 #endif
1608 rose_loopback_init();
1609
1610 rose_add_loopback_neigh();
1611
1612 proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1613 proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1614 proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1615 proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1616 out:
1617 return rc;
1618 fail:
1619 while (--i >= 0) {
1620 unregister_netdev(dev_rose[i]);
1621 free_netdev(dev_rose[i]);
1622 }
1623 kfree(dev_rose);
1624 out_proto_unregister:
1625 proto_unregister(&rose_proto);
1626 goto out;
1627 }
1628 module_init(rose_proto_init);
1629
1630 module_param(rose_ndevs, int, 0);
1631 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1632
1633 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1634 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1635 MODULE_LICENSE("GPL");
1636 MODULE_ALIAS_NETPROTO(PF_ROSE);
1637
1638 static void __exit rose_exit(void)
1639 {
1640 int i;
1641
1642 proc_net_remove(&init_net, "rose");
1643 proc_net_remove(&init_net, "rose_neigh");
1644 proc_net_remove(&init_net, "rose_nodes");
1645 proc_net_remove(&init_net, "rose_routes");
1646 rose_loopback_clear();
1647
1648 rose_rt_free();
1649
1650 ax25_protocol_release(AX25_P_ROSE);
1651 ax25_linkfail_release(&rose_linkfail_notifier);
1652
1653 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1654 ax25_listen_release(&rose_callsign, NULL);
1655
1656 #ifdef CONFIG_SYSCTL
1657 rose_unregister_sysctl();
1658 #endif
1659 unregister_netdevice_notifier(&rose_dev_notifier);
1660
1661 sock_unregister(PF_ROSE);
1662
1663 for (i = 0; i < rose_ndevs; i++) {
1664 struct net_device *dev = dev_rose[i];
1665
1666 if (dev) {
1667 unregister_netdev(dev);
1668 free_netdev(dev);
1669 }
1670 }
1671
1672 kfree(dev_rose);
1673 proto_unregister(&rose_proto);
1674 }
1675
1676 module_exit(rose_exit);
Support for the Chinese Samsung S3C2440 based development boards