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dm: implement REQ_FLUSH/FUA support for request-based dm
[linux/fpc-iii.git] / net / rose / af_rose.c
blob8e45e76a95f51cdca332263ee7e32108f0beb95c
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/slab.h>
22 #include <linux/kernel.h>
23 #include <linux/sched.h>
24 #include <linux/spinlock.h>
25 #include <linux/timer.h>
26 #include <linux/string.h>
27 #include <linux/sockios.h>
28 #include <linux/net.h>
29 #include <linux/stat.h>
30 #include <net/net_namespace.h>
31 #include <net/ax25.h>
32 #include <linux/inet.h>
33 #include <linux/netdevice.h>
34 #include <linux/if_arp.h>
35 #include <linux/skbuff.h>
36 #include <net/sock.h>
37 #include <asm/system.h>
38 #include <asm/uaccess.h>
39 #include <linux/fcntl.h>
40 #include <linux/termios.h>
41 #include <linux/mm.h>
42 #include <linux/interrupt.h>
43 #include <linux/notifier.h>
44 #include <net/rose.h>
45 #include <linux/proc_fs.h>
46 #include <linux/seq_file.h>
47 #include <net/tcp_states.h>
48 #include <net/ip.h>
49 #include <net/arp.h>
50
51 static int rose_ndevs = 10;
52
53 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
54 int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
55 int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
56 int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
57 int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
58 int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
59 int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
60 int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
61 int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
62 int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
63
64 static HLIST_HEAD(rose_list);
65 static DEFINE_SPINLOCK(rose_list_lock);
66
67 static const struct proto_ops rose_proto_ops;
68
69 ax25_address rose_callsign;
70
71 /*
72 * ROSE network devices are virtual network devices encapsulating ROSE
73 * frames into AX.25 which will be sent through an AX.25 device, so form a
74 * special "super class" of normal net devices; split their locks off into a
75 * separate class since they always nest.
76 */
77 static struct lock_class_key rose_netdev_xmit_lock_key;
78 static struct lock_class_key rose_netdev_addr_lock_key;
79
80 static void rose_set_lockdep_one(struct net_device *dev,
81 struct netdev_queue *txq,
82 void *_unused)
83 {
84 lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
85 }
86
87 static void rose_set_lockdep_key(struct net_device *dev)
88 {
89 lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
90 netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
91 }
92
93 /*
94 * Convert a ROSE address into text.
95 */
96 char *rose2asc(char *buf, const rose_address *addr)
97 {
98 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
99 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
100 addr->rose_addr[4] == 0x00) {
101 strcpy(buf, "*");
102 } else {
103 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
104 addr->rose_addr[1] & 0xFF,
105 addr->rose_addr[2] & 0xFF,
106 addr->rose_addr[3] & 0xFF,
107 addr->rose_addr[4] & 0xFF);
108 }
109
110 return buf;
111 }
112
113 /*
114 * Compare two ROSE addresses, 0 == equal.
115 */
116 int rosecmp(rose_address *addr1, rose_address *addr2)
117 {
118 int i;
119
120 for (i = 0; i < 5; i++)
121 if (addr1->rose_addr[i] != addr2->rose_addr[i])
122 return 1;
123
124 return 0;
125 }
126
127 /*
128 * Compare two ROSE addresses for only mask digits, 0 == equal.
129 */
130 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
131 {
132 unsigned int i, j;
133
134 if (mask > 10)
135 return 1;
136
137 for (i = 0; i < mask; i++) {
138 j = i / 2;
139
140 if ((i % 2) != 0) {
141 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
142 return 1;
143 } else {
144 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
145 return 1;
146 }
147 }
148
149 return 0;
150 }
151
152 /*
153 * Socket removal during an interrupt is now safe.
154 */
155 static void rose_remove_socket(struct sock *sk)
156 {
157 spin_lock_bh(&rose_list_lock);
158 sk_del_node_init(sk);
159 spin_unlock_bh(&rose_list_lock);
160 }
161
162 /*
163 * Kill all bound sockets on a broken link layer connection to a
164 * particular neighbour.
165 */
166 void rose_kill_by_neigh(struct rose_neigh *neigh)
167 {
168 struct sock *s;
169 struct hlist_node *node;
170
171 spin_lock_bh(&rose_list_lock);
172 sk_for_each(s, node, &rose_list) {
173 struct rose_sock *rose = rose_sk(s);
174
175 if (rose->neighbour == neigh) {
176 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
177 rose->neighbour->use--;
178 rose->neighbour = NULL;
179 }
180 }
181 spin_unlock_bh(&rose_list_lock);
182 }
183
184 /*
185 * Kill all bound sockets on a dropped device.
186 */
187 static void rose_kill_by_device(struct net_device *dev)
188 {
189 struct sock *s;
190 struct hlist_node *node;
191
192 spin_lock_bh(&rose_list_lock);
193 sk_for_each(s, node, &rose_list) {
194 struct rose_sock *rose = rose_sk(s);
195
196 if (rose->device == dev) {
197 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
198 rose->neighbour->use--;
199 rose->device = NULL;
200 }
201 }
202 spin_unlock_bh(&rose_list_lock);
203 }
204
205 /*
206 * Handle device status changes.
207 */
208 static int rose_device_event(struct notifier_block *this, unsigned long event,
209 void *ptr)
210 {
211 struct net_device *dev = (struct net_device *)ptr;
212
213 if (!net_eq(dev_net(dev), &init_net))
214 return NOTIFY_DONE;
215
216 if (event != NETDEV_DOWN)
217 return NOTIFY_DONE;
218
219 switch (dev->type) {
220 case ARPHRD_ROSE:
221 rose_kill_by_device(dev);
222 break;
223 case ARPHRD_AX25:
224 rose_link_device_down(dev);
225 rose_rt_device_down(dev);
226 break;
227 }
228
229 return NOTIFY_DONE;
230 }
231
232 /*
233 * Add a socket to the bound sockets list.
234 */
235 static void rose_insert_socket(struct sock *sk)
236 {
237
238 spin_lock_bh(&rose_list_lock);
239 sk_add_node(sk, &rose_list);
240 spin_unlock_bh(&rose_list_lock);
241 }
242
243 /*
244 * Find a socket that wants to accept the Call Request we just
245 * received.
246 */
247 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
248 {
249 struct sock *s;
250 struct hlist_node *node;
251
252 spin_lock_bh(&rose_list_lock);
253 sk_for_each(s, node, &rose_list) {
254 struct rose_sock *rose = rose_sk(s);
255
256 if (!rosecmp(&rose->source_addr, addr) &&
257 !ax25cmp(&rose->source_call, call) &&
258 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
259 goto found;
260 }
261
262 sk_for_each(s, node, &rose_list) {
263 struct rose_sock *rose = rose_sk(s);
264
265 if (!rosecmp(&rose->source_addr, addr) &&
266 !ax25cmp(&rose->source_call, &null_ax25_address) &&
267 s->sk_state == TCP_LISTEN)
268 goto found;
269 }
270 s = NULL;
271 found:
272 spin_unlock_bh(&rose_list_lock);
273 return s;
274 }
275
276 /*
277 * Find a connected ROSE socket given my LCI and device.
278 */
279 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
280 {
281 struct sock *s;
282 struct hlist_node *node;
283
284 spin_lock_bh(&rose_list_lock);
285 sk_for_each(s, node, &rose_list) {
286 struct rose_sock *rose = rose_sk(s);
287
288 if (rose->lci == lci && rose->neighbour == neigh)
289 goto found;
290 }
291 s = NULL;
292 found:
293 spin_unlock_bh(&rose_list_lock);
294 return s;
295 }
296
297 /*
298 * Find a unique LCI for a given device.
299 */
300 unsigned int rose_new_lci(struct rose_neigh *neigh)
301 {
302 int lci;
303
304 if (neigh->dce_mode) {
305 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
306 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
307 return lci;
308 } else {
309 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
310 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
311 return lci;
312 }
313
314 return 0;
315 }
316
317 /*
318 * Deferred destroy.
319 */
320 void rose_destroy_socket(struct sock *);
321
322 /*
323 * Handler for deferred kills.
324 */
325 static void rose_destroy_timer(unsigned long data)
326 {
327 rose_destroy_socket((struct sock *)data);
328 }
329
330 /*
331 * This is called from user mode and the timers. Thus it protects itself
332 * against interrupt users but doesn't worry about being called during
333 * work. Once it is removed from the queue no interrupt or bottom half
334 * will touch it and we are (fairly 8-) ) safe.
335 */
336 void rose_destroy_socket(struct sock *sk)
337 {
338 struct sk_buff *skb;
339
340 rose_remove_socket(sk);
341 rose_stop_heartbeat(sk);
342 rose_stop_idletimer(sk);
343 rose_stop_timer(sk);
344
345 rose_clear_queues(sk); /* Flush the queues */
346
347 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
348 if (skb->sk != sk) { /* A pending connection */
349 /* Queue the unaccepted socket for death */
350 sock_set_flag(skb->sk, SOCK_DEAD);
351 rose_start_heartbeat(skb->sk);
352 rose_sk(skb->sk)->state = ROSE_STATE_0;
353 }
354
355 kfree_skb(skb);
356 }
357
358 if (sk_has_allocations(sk)) {
359 /* Defer: outstanding buffers */
360 setup_timer(&sk->sk_timer, rose_destroy_timer,
361 (unsigned long)sk);
362 sk->sk_timer.expires = jiffies + 10 * HZ;
363 add_timer(&sk->sk_timer);
364 } else
365 sock_put(sk);
366 }
367
368 /*
369 * Handling for system calls applied via the various interfaces to a
370 * ROSE socket object.
371 */
372
373 static int rose_setsockopt(struct socket *sock, int level, int optname,
374 char __user *optval, unsigned int optlen)
375 {
376 struct sock *sk = sock->sk;
377 struct rose_sock *rose = rose_sk(sk);
378 int opt;
379
380 if (level != SOL_ROSE)
381 return -ENOPROTOOPT;
382
383 if (optlen < sizeof(int))
384 return -EINVAL;
385
386 if (get_user(opt, (int __user *)optval))
387 return -EFAULT;
388
389 switch (optname) {
390 case ROSE_DEFER:
391 rose->defer = opt ? 1 : 0;
392 return 0;
393
394 case ROSE_T1:
395 if (opt < 1)
396 return -EINVAL;
397 rose->t1 = opt * HZ;
398 return 0;
399
400 case ROSE_T2:
401 if (opt < 1)
402 return -EINVAL;
403 rose->t2 = opt * HZ;
404 return 0;
405
406 case ROSE_T3:
407 if (opt < 1)
408 return -EINVAL;
409 rose->t3 = opt * HZ;
410 return 0;
411
412 case ROSE_HOLDBACK:
413 if (opt < 1)
414 return -EINVAL;
415 rose->hb = opt * HZ;
416 return 0;
417
418 case ROSE_IDLE:
419 if (opt < 0)
420 return -EINVAL;
421 rose->idle = opt * 60 * HZ;
422 return 0;
423
424 case ROSE_QBITINCL:
425 rose->qbitincl = opt ? 1 : 0;
426 return 0;
427
428 default:
429 return -ENOPROTOOPT;
430 }
431 }
432
433 static int rose_getsockopt(struct socket *sock, int level, int optname,
434 char __user *optval, int __user *optlen)
435 {
436 struct sock *sk = sock->sk;
437 struct rose_sock *rose = rose_sk(sk);
438 int val = 0;
439 int len;
440
441 if (level != SOL_ROSE)
442 return -ENOPROTOOPT;
443
444 if (get_user(len, optlen))
445 return -EFAULT;
446
447 if (len < 0)
448 return -EINVAL;
449
450 switch (optname) {
451 case ROSE_DEFER:
452 val = rose->defer;
453 break;
454
455 case ROSE_T1:
456 val = rose->t1 / HZ;
457 break;
458
459 case ROSE_T2:
460 val = rose->t2 / HZ;
461 break;
462
463 case ROSE_T3:
464 val = rose->t3 / HZ;
465 break;
466
467 case ROSE_HOLDBACK:
468 val = rose->hb / HZ;
469 break;
470
471 case ROSE_IDLE:
472 val = rose->idle / (60 * HZ);
473 break;
474
475 case ROSE_QBITINCL:
476 val = rose->qbitincl;
477 break;
478
479 default:
480 return -ENOPROTOOPT;
481 }
482
483 len = min_t(unsigned int, len, sizeof(int));
484
485 if (put_user(len, optlen))
486 return -EFAULT;
487
488 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
489 }
490
491 static int rose_listen(struct socket *sock, int backlog)
492 {
493 struct sock *sk = sock->sk;
494
495 if (sk->sk_state != TCP_LISTEN) {
496 struct rose_sock *rose = rose_sk(sk);
497
498 rose->dest_ndigis = 0;
499 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
500 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
501 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
502 sk->sk_max_ack_backlog = backlog;
503 sk->sk_state = TCP_LISTEN;
504 return 0;
505 }
506
507 return -EOPNOTSUPP;
508 }
509
510 static struct proto rose_proto = {
511 .name = "ROSE",
512 .owner = THIS_MODULE,
513 .obj_size = sizeof(struct rose_sock),
514 };
515
516 static int rose_create(struct net *net, struct socket *sock, int protocol,
517 int kern)
518 {
519 struct sock *sk;
520 struct rose_sock *rose;
521
522 if (!net_eq(net, &init_net))
523 return -EAFNOSUPPORT;
524
525 if (sock->type != SOCK_SEQPACKET || protocol != 0)
526 return -ESOCKTNOSUPPORT;
527
528 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
529 if (sk == NULL)
530 return -ENOMEM;
531
532 rose = rose_sk(sk);
533
534 sock_init_data(sock, sk);
535
536 skb_queue_head_init(&rose->ack_queue);
537 #ifdef M_BIT
538 skb_queue_head_init(&rose->frag_queue);
539 rose->fraglen = 0;
540 #endif
541
542 sock->ops = &rose_proto_ops;
543 sk->sk_protocol = protocol;
544
545 init_timer(&rose->timer);
546 init_timer(&rose->idletimer);
547
548 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
549 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
550 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
551 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
552 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
553
554 rose->state = ROSE_STATE_0;
555
556 return 0;
557 }
558
559 static struct sock *rose_make_new(struct sock *osk)
560 {
561 struct sock *sk;
562 struct rose_sock *rose, *orose;
563
564 if (osk->sk_type != SOCK_SEQPACKET)
565 return NULL;
566
567 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto);
568 if (sk == NULL)
569 return NULL;
570
571 rose = rose_sk(sk);
572
573 sock_init_data(NULL, sk);
574
575 skb_queue_head_init(&rose->ack_queue);
576 #ifdef M_BIT
577 skb_queue_head_init(&rose->frag_queue);
578 rose->fraglen = 0;
579 #endif
580
581 sk->sk_type = osk->sk_type;
582 sk->sk_priority = osk->sk_priority;
583 sk->sk_protocol = osk->sk_protocol;
584 sk->sk_rcvbuf = osk->sk_rcvbuf;
585 sk->sk_sndbuf = osk->sk_sndbuf;
586 sk->sk_state = TCP_ESTABLISHED;
587 sock_copy_flags(sk, osk);
588
589 init_timer(&rose->timer);
590 init_timer(&rose->idletimer);
591
592 orose = rose_sk(osk);
593 rose->t1 = orose->t1;
594 rose->t2 = orose->t2;
595 rose->t3 = orose->t3;
596 rose->hb = orose->hb;
597 rose->idle = orose->idle;
598 rose->defer = orose->defer;
599 rose->device = orose->device;
600 rose->qbitincl = orose->qbitincl;
601
602 return sk;
603 }
604
605 static int rose_release(struct socket *sock)
606 {
607 struct sock *sk = sock->sk;
608 struct rose_sock *rose;
609
610 if (sk == NULL) return 0;
611
612 sock_hold(sk);
613 sock_orphan(sk);
614 lock_sock(sk);
615 rose = rose_sk(sk);
616
617 switch (rose->state) {
618 case ROSE_STATE_0:
619 release_sock(sk);
620 rose_disconnect(sk, 0, -1, -1);
621 lock_sock(sk);
622 rose_destroy_socket(sk);
623 break;
624
625 case ROSE_STATE_2:
626 rose->neighbour->use--;
627 release_sock(sk);
628 rose_disconnect(sk, 0, -1, -1);
629 lock_sock(sk);
630 rose_destroy_socket(sk);
631 break;
632
633 case ROSE_STATE_1:
634 case ROSE_STATE_3:
635 case ROSE_STATE_4:
636 case ROSE_STATE_5:
637 rose_clear_queues(sk);
638 rose_stop_idletimer(sk);
639 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
640 rose_start_t3timer(sk);
641 rose->state = ROSE_STATE_2;
642 sk->sk_state = TCP_CLOSE;
643 sk->sk_shutdown |= SEND_SHUTDOWN;
644 sk->sk_state_change(sk);
645 sock_set_flag(sk, SOCK_DEAD);
646 sock_set_flag(sk, SOCK_DESTROY);
647 break;
648
649 default:
650 break;
651 }
652
653 sock->sk = NULL;
654 release_sock(sk);
655 sock_put(sk);
656
657 return 0;
658 }
659
660 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
661 {
662 struct sock *sk = sock->sk;
663 struct rose_sock *rose = rose_sk(sk);
664 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
665 struct net_device *dev;
666 ax25_address *source;
667 ax25_uid_assoc *user;
668 int n;
669
670 if (!sock_flag(sk, SOCK_ZAPPED))
671 return -EINVAL;
672
673 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
674 return -EINVAL;
675
676 if (addr->srose_family != AF_ROSE)
677 return -EINVAL;
678
679 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
680 return -EINVAL;
681
682 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
683 return -EINVAL;
684
685 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
686 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
687 return -EADDRNOTAVAIL;
688 }
689
690 source = &addr->srose_call;
691
692 user = ax25_findbyuid(current_euid());
693 if (user) {
694 rose->source_call = user->call;
695 ax25_uid_put(user);
696 } else {
697 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
698 return -EACCES;
699 rose->source_call = *source;
700 }
701
702 rose->source_addr = addr->srose_addr;
703 rose->device = dev;
704 rose->source_ndigis = addr->srose_ndigis;
705
706 if (addr_len == sizeof(struct full_sockaddr_rose)) {
707 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
708 for (n = 0 ; n < addr->srose_ndigis ; n++)
709 rose->source_digis[n] = full_addr->srose_digis[n];
710 } else {
711 if (rose->source_ndigis == 1) {
712 rose->source_digis[0] = addr->srose_digi;
713 }
714 }
715
716 rose_insert_socket(sk);
717
718 sock_reset_flag(sk, SOCK_ZAPPED);
719 SOCK_DEBUG(sk, "ROSE: socket is bound\n");
720 return 0;
721 }
722
723 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
724 {
725 struct sock *sk = sock->sk;
726 struct rose_sock *rose = rose_sk(sk);
727 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
728 unsigned char cause, diagnostic;
729 struct net_device *dev;
730 ax25_uid_assoc *user;
731 int n, err = 0;
732
733 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
734 return -EINVAL;
735
736 if (addr->srose_family != AF_ROSE)
737 return -EINVAL;
738
739 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
740 return -EINVAL;
741
742 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
743 return -EINVAL;
744
745 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
746 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
747 return -EINVAL;
748
749 lock_sock(sk);
750
751 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
752 /* Connect completed during a ERESTARTSYS event */
753 sock->state = SS_CONNECTED;
754 goto out_release;
755 }
756
757 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
758 sock->state = SS_UNCONNECTED;
759 err = -ECONNREFUSED;
760 goto out_release;
761 }
762
763 if (sk->sk_state == TCP_ESTABLISHED) {
764 /* No reconnect on a seqpacket socket */
765 err = -EISCONN;
766 goto out_release;
767 }
768
769 sk->sk_state = TCP_CLOSE;
770 sock->state = SS_UNCONNECTED;
771
772 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
773 &diagnostic, 0);
774 if (!rose->neighbour) {
775 err = -ENETUNREACH;
776 goto out_release;
777 }
778
779 rose->lci = rose_new_lci(rose->neighbour);
780 if (!rose->lci) {
781 err = -ENETUNREACH;
782 goto out_release;
783 }
784
785 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
786 sock_reset_flag(sk, SOCK_ZAPPED);
787
788 if ((dev = rose_dev_first()) == NULL) {
789 err = -ENETUNREACH;
790 goto out_release;
791 }
792
793 user = ax25_findbyuid(current_euid());
794 if (!user) {
795 err = -EINVAL;
796 goto out_release;
797 }
798
799 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
800 rose->source_call = user->call;
801 rose->device = dev;
802 ax25_uid_put(user);
803
804 rose_insert_socket(sk); /* Finish the bind */
805 }
806 rose_try_next_neigh:
807 rose->dest_addr = addr->srose_addr;
808 rose->dest_call = addr->srose_call;
809 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
810 rose->dest_ndigis = addr->srose_ndigis;
811
812 if (addr_len == sizeof(struct full_sockaddr_rose)) {
813 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
814 for (n = 0 ; n < addr->srose_ndigis ; n++)
815 rose->dest_digis[n] = full_addr->srose_digis[n];
816 } else {
817 if (rose->dest_ndigis == 1) {
818 rose->dest_digis[0] = addr->srose_digi;
819 }
820 }
821
822 /* Move to connecting socket, start sending Connect Requests */
823 sock->state = SS_CONNECTING;
824 sk->sk_state = TCP_SYN_SENT;
825
826 rose->state = ROSE_STATE_1;
827
828 rose->neighbour->use++;
829
830 rose_write_internal(sk, ROSE_CALL_REQUEST);
831 rose_start_heartbeat(sk);
832 rose_start_t1timer(sk);
833
834 /* Now the loop */
835 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
836 err = -EINPROGRESS;
837 goto out_release;
838 }
839
840 /*
841 * A Connect Ack with Choke or timeout or failed routing will go to
842 * closed.
843 */
844 if (sk->sk_state == TCP_SYN_SENT) {
845 DEFINE_WAIT(wait);
846
847 for (;;) {
848 prepare_to_wait(sk_sleep(sk), &wait,
849 TASK_INTERRUPTIBLE);
850 if (sk->sk_state != TCP_SYN_SENT)
851 break;
852 if (!signal_pending(current)) {
853 release_sock(sk);
854 schedule();
855 lock_sock(sk);
856 continue;
857 }
858 err = -ERESTARTSYS;
859 break;
860 }
861 finish_wait(sk_sleep(sk), &wait);
862
863 if (err)
864 goto out_release;
865 }
866
867 if (sk->sk_state != TCP_ESTABLISHED) {
868 /* Try next neighbour */
869 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic, 0);
870 if (rose->neighbour)
871 goto rose_try_next_neigh;
872
873 /* No more neighbours */
874 sock->state = SS_UNCONNECTED;
875 err = sock_error(sk); /* Always set at this point */
876 goto out_release;
877 }
878
879 sock->state = SS_CONNECTED;
880
881 out_release:
882 release_sock(sk);
883
884 return err;
885 }
886
887 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
888 {
889 struct sk_buff *skb;
890 struct sock *newsk;
891 DEFINE_WAIT(wait);
892 struct sock *sk;
893 int err = 0;
894
895 if ((sk = sock->sk) == NULL)
896 return -EINVAL;
897
898 lock_sock(sk);
899 if (sk->sk_type != SOCK_SEQPACKET) {
900 err = -EOPNOTSUPP;
901 goto out_release;
902 }
903
904 if (sk->sk_state != TCP_LISTEN) {
905 err = -EINVAL;
906 goto out_release;
907 }
908
909 /*
910 * The write queue this time is holding sockets ready to use
911 * hooked into the SABM we saved
912 */
913 for (;;) {
914 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
915
916 skb = skb_dequeue(&sk->sk_receive_queue);
917 if (skb)
918 break;
919
920 if (flags & O_NONBLOCK) {
921 err = -EWOULDBLOCK;
922 break;
923 }
924 if (!signal_pending(current)) {
925 release_sock(sk);
926 schedule();
927 lock_sock(sk);
928 continue;
929 }
930 err = -ERESTARTSYS;
931 break;
932 }
933 finish_wait(sk_sleep(sk), &wait);
934 if (err)
935 goto out_release;
936
937 newsk = skb->sk;
938 sock_graft(newsk, newsock);
939
940 /* Now attach up the new socket */
941 skb->sk = NULL;
942 kfree_skb(skb);
943 sk->sk_ack_backlog--;
944
945 out_release:
946 release_sock(sk);
947
948 return err;
949 }
950
951 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
952 int *uaddr_len, int peer)
953 {
954 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
955 struct sock *sk = sock->sk;
956 struct rose_sock *rose = rose_sk(sk);
957 int n;
958
959 memset(srose, 0, sizeof(*srose));
960 if (peer != 0) {
961 if (sk->sk_state != TCP_ESTABLISHED)
962 return -ENOTCONN;
963 srose->srose_family = AF_ROSE;
964 srose->srose_addr = rose->dest_addr;
965 srose->srose_call = rose->dest_call;
966 srose->srose_ndigis = rose->dest_ndigis;
967 for (n = 0; n < rose->dest_ndigis; n++)
968 srose->srose_digis[n] = rose->dest_digis[n];
969 } else {
970 srose->srose_family = AF_ROSE;
971 srose->srose_addr = rose->source_addr;
972 srose->srose_call = rose->source_call;
973 srose->srose_ndigis = rose->source_ndigis;
974 for (n = 0; n < rose->source_ndigis; n++)
975 srose->srose_digis[n] = rose->source_digis[n];
976 }
977
978 *uaddr_len = sizeof(struct full_sockaddr_rose);
979 return 0;
980 }
981
982 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
983 {
984 struct sock *sk;
985 struct sock *make;
986 struct rose_sock *make_rose;
987 struct rose_facilities_struct facilities;
988 int n, len;
989
990 skb->sk = NULL; /* Initially we don't know who it's for */
991
992 /*
993 * skb->data points to the rose frame start
994 */
995 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
996
997 len = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
998 len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
999 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
1000 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
1001 return 0;
1002 }
1003
1004 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1005
1006 /*
1007 * We can't accept the Call Request.
1008 */
1009 if (sk == NULL || sk_acceptq_is_full(sk) ||
1010 (make = rose_make_new(sk)) == NULL) {
1011 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1012 return 0;
1013 }
1014
1015 skb->sk = make;
1016 make->sk_state = TCP_ESTABLISHED;
1017 make_rose = rose_sk(make);
1018
1019 make_rose->lci = lci;
1020 make_rose->dest_addr = facilities.dest_addr;
1021 make_rose->dest_call = facilities.dest_call;
1022 make_rose->dest_ndigis = facilities.dest_ndigis;
1023 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1024 make_rose->dest_digis[n] = facilities.dest_digis[n];
1025 make_rose->source_addr = facilities.source_addr;
1026 make_rose->source_call = facilities.source_call;
1027 make_rose->source_ndigis = facilities.source_ndigis;
1028 for (n = 0 ; n < facilities.source_ndigis ; n++)
1029 make_rose->source_digis[n]= facilities.source_digis[n];
1030 make_rose->neighbour = neigh;
1031 make_rose->device = dev;
1032 make_rose->facilities = facilities;
1033
1034 make_rose->neighbour->use++;
1035
1036 if (rose_sk(sk)->defer) {
1037 make_rose->state = ROSE_STATE_5;
1038 } else {
1039 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1040 make_rose->state = ROSE_STATE_3;
1041 rose_start_idletimer(make);
1042 }
1043
1044 make_rose->condition = 0x00;
1045 make_rose->vs = 0;
1046 make_rose->va = 0;
1047 make_rose->vr = 0;
1048 make_rose->vl = 0;
1049 sk->sk_ack_backlog++;
1050
1051 rose_insert_socket(make);
1052
1053 skb_queue_head(&sk->sk_receive_queue, skb);
1054
1055 rose_start_heartbeat(make);
1056
1057 if (!sock_flag(sk, SOCK_DEAD))
1058 sk->sk_data_ready(sk, skb->len);
1059
1060 return 1;
1061 }
1062
1063 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1064 struct msghdr *msg, size_t len)
1065 {
1066 struct sock *sk = sock->sk;
1067 struct rose_sock *rose = rose_sk(sk);
1068 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1069 int err;
1070 struct full_sockaddr_rose srose;
1071 struct sk_buff *skb;
1072 unsigned char *asmptr;
1073 int n, size, qbit = 0;
1074
1075 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1076 return -EINVAL;
1077
1078 if (sock_flag(sk, SOCK_ZAPPED))
1079 return -EADDRNOTAVAIL;
1080
1081 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1082 send_sig(SIGPIPE, current, 0);
1083 return -EPIPE;
1084 }
1085
1086 if (rose->neighbour == NULL || rose->device == NULL)
1087 return -ENETUNREACH;
1088
1089 if (usrose != NULL) {
1090 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1091 return -EINVAL;
1092 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1093 memcpy(&srose, usrose, msg->msg_namelen);
1094 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1095 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1096 return -EISCONN;
1097 if (srose.srose_ndigis != rose->dest_ndigis)
1098 return -EISCONN;
1099 if (srose.srose_ndigis == rose->dest_ndigis) {
1100 for (n = 0 ; n < srose.srose_ndigis ; n++)
1101 if (ax25cmp(&rose->dest_digis[n],
1102 &srose.srose_digis[n]))
1103 return -EISCONN;
1104 }
1105 if (srose.srose_family != AF_ROSE)
1106 return -EINVAL;
1107 } else {
1108 if (sk->sk_state != TCP_ESTABLISHED)
1109 return -ENOTCONN;
1110
1111 srose.srose_family = AF_ROSE;
1112 srose.srose_addr = rose->dest_addr;
1113 srose.srose_call = rose->dest_call;
1114 srose.srose_ndigis = rose->dest_ndigis;
1115 for (n = 0 ; n < rose->dest_ndigis ; n++)
1116 srose.srose_digis[n] = rose->dest_digis[n];
1117 }
1118
1119 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1120
1121 /* Build a packet */
1122 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1123 /* Sanity check the packet size */
1124 if (len > 65535)
1125 return -EMSGSIZE;
1126
1127 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1128
1129 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1130 return err;
1131
1132 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1133
1134 /*
1135 * Put the data on the end
1136 */
1137 SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1138
1139 skb_reset_transport_header(skb);
1140 skb_put(skb, len);
1141
1142 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1143 if (err) {
1144 kfree_skb(skb);
1145 return err;
1146 }
1147
1148 /*
1149 * If the Q BIT Include socket option is in force, the first
1150 * byte of the user data is the logical value of the Q Bit.
1151 */
1152 if (rose->qbitincl) {
1153 qbit = skb->data[0];
1154 skb_pull(skb, 1);
1155 }
1156
1157 /*
1158 * Push down the ROSE header
1159 */
1160 asmptr = skb_push(skb, ROSE_MIN_LEN);
1161
1162 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1163
1164 /* Build a ROSE Network header */
1165 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1166 asmptr[1] = (rose->lci >> 0) & 0xFF;
1167 asmptr[2] = ROSE_DATA;
1168
1169 if (qbit)
1170 asmptr[0] |= ROSE_Q_BIT;
1171
1172 SOCK_DEBUG(sk, "ROSE: Built header.\n");
1173
1174 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1175
1176 if (sk->sk_state != TCP_ESTABLISHED) {
1177 kfree_skb(skb);
1178 return -ENOTCONN;
1179 }
1180
1181 #ifdef M_BIT
1182 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1183 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1184 unsigned char header[ROSE_MIN_LEN];
1185 struct sk_buff *skbn;
1186 int frontlen;
1187 int lg;
1188
1189 /* Save a copy of the Header */
1190 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1191 skb_pull(skb, ROSE_MIN_LEN);
1192
1193 frontlen = skb_headroom(skb);
1194
1195 while (skb->len > 0) {
1196 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1197 kfree_skb(skb);
1198 return err;
1199 }
1200
1201 skbn->sk = sk;
1202 skbn->free = 1;
1203 skbn->arp = 1;
1204
1205 skb_reserve(skbn, frontlen);
1206
1207 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1208
1209 /* Copy the user data */
1210 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1211 skb_pull(skb, lg);
1212
1213 /* Duplicate the Header */
1214 skb_push(skbn, ROSE_MIN_LEN);
1215 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1216
1217 if (skb->len > 0)
1218 skbn->data[2] |= M_BIT;
1219
1220 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1221 }
1222
1223 skb->free = 1;
1224 kfree_skb(skb);
1225 } else {
1226 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1227 }
1228 #else
1229 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1230 #endif
1231
1232 rose_kick(sk);
1233
1234 return len;
1235 }
1236
1237
1238 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1239 struct msghdr *msg, size_t size, int flags)
1240 {
1241 struct sock *sk = sock->sk;
1242 struct rose_sock *rose = rose_sk(sk);
1243 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1244 size_t copied;
1245 unsigned char *asmptr;
1246 struct sk_buff *skb;
1247 int n, er, qbit;
1248
1249 /*
1250 * This works for seqpacket too. The receiver has ordered the queue for
1251 * us! We do one quick check first though
1252 */
1253 if (sk->sk_state != TCP_ESTABLISHED)
1254 return -ENOTCONN;
1255
1256 /* Now we can treat all alike */
1257 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1258 return er;
1259
1260 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1261
1262 skb_pull(skb, ROSE_MIN_LEN);
1263
1264 if (rose->qbitincl) {
1265 asmptr = skb_push(skb, 1);
1266 *asmptr = qbit;
1267 }
1268
1269 skb_reset_transport_header(skb);
1270 copied = skb->len;
1271
1272 if (copied > size) {
1273 copied = size;
1274 msg->msg_flags |= MSG_TRUNC;
1275 }
1276
1277 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1278
1279 if (srose != NULL) {
1280 srose->srose_family = AF_ROSE;
1281 srose->srose_addr = rose->dest_addr;
1282 srose->srose_call = rose->dest_call;
1283 srose->srose_ndigis = rose->dest_ndigis;
1284 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1285 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1286 for (n = 0 ; n < rose->dest_ndigis ; n++)
1287 full_srose->srose_digis[n] = rose->dest_digis[n];
1288 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1289 } else {
1290 if (rose->dest_ndigis >= 1) {
1291 srose->srose_ndigis = 1;
1292 srose->srose_digi = rose->dest_digis[0];
1293 }
1294 msg->msg_namelen = sizeof(struct sockaddr_rose);
1295 }
1296 }
1297
1298 skb_free_datagram(sk, skb);
1299
1300 return copied;
1301 }
1302
1303
1304 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1305 {
1306 struct sock *sk = sock->sk;
1307 struct rose_sock *rose = rose_sk(sk);
1308 void __user *argp = (void __user *)arg;
1309
1310 switch (cmd) {
1311 case TIOCOUTQ: {
1312 long amount;
1313
1314 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1315 if (amount < 0)
1316 amount = 0;
1317 return put_user(amount, (unsigned int __user *) argp);
1318 }
1319
1320 case TIOCINQ: {
1321 struct sk_buff *skb;
1322 long amount = 0L;
1323 /* These two are safe on a single CPU system as only user tasks fiddle here */
1324 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1325 amount = skb->len;
1326 return put_user(amount, (unsigned int __user *) argp);
1327 }
1328
1329 case SIOCGSTAMP:
1330 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1331
1332 case SIOCGSTAMPNS:
1333 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1334
1335 case SIOCGIFADDR:
1336 case SIOCSIFADDR:
1337 case SIOCGIFDSTADDR:
1338 case SIOCSIFDSTADDR:
1339 case SIOCGIFBRDADDR:
1340 case SIOCSIFBRDADDR:
1341 case SIOCGIFNETMASK:
1342 case SIOCSIFNETMASK:
1343 case SIOCGIFMETRIC:
1344 case SIOCSIFMETRIC:
1345 return -EINVAL;
1346
1347 case SIOCADDRT:
1348 case SIOCDELRT:
1349 case SIOCRSCLRRT:
1350 if (!capable(CAP_NET_ADMIN))
1351 return -EPERM;
1352 return rose_rt_ioctl(cmd, argp);
1353
1354 case SIOCRSGCAUSE: {
1355 struct rose_cause_struct rose_cause;
1356 rose_cause.cause = rose->cause;
1357 rose_cause.diagnostic = rose->diagnostic;
1358 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1359 }
1360
1361 case SIOCRSSCAUSE: {
1362 struct rose_cause_struct rose_cause;
1363 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1364 return -EFAULT;
1365 rose->cause = rose_cause.cause;
1366 rose->diagnostic = rose_cause.diagnostic;
1367 return 0;
1368 }
1369
1370 case SIOCRSSL2CALL:
1371 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1372 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1373 ax25_listen_release(&rose_callsign, NULL);
1374 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1375 return -EFAULT;
1376 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1377 return ax25_listen_register(&rose_callsign, NULL);
1378
1379 return 0;
1380
1381 case SIOCRSGL2CALL:
1382 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1383
1384 case SIOCRSACCEPT:
1385 if (rose->state == ROSE_STATE_5) {
1386 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1387 rose_start_idletimer(sk);
1388 rose->condition = 0x00;
1389 rose->vs = 0;
1390 rose->va = 0;
1391 rose->vr = 0;
1392 rose->vl = 0;
1393 rose->state = ROSE_STATE_3;
1394 }
1395 return 0;
1396
1397 default:
1398 return -ENOIOCTLCMD;
1399 }
1400
1401 return 0;
1402 }
1403
1404 #ifdef CONFIG_PROC_FS
1405 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1406 __acquires(rose_list_lock)
1407 {
1408 spin_lock_bh(&rose_list_lock);
1409 return seq_hlist_start_head(&rose_list, *pos);
1410 }
1411
1412 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1413 {
1414 return seq_hlist_next(v, &rose_list, pos);
1415 }
1416
1417 static void rose_info_stop(struct seq_file *seq, void *v)
1418 __releases(rose_list_lock)
1419 {
1420 spin_unlock_bh(&rose_list_lock);
1421 }
1422
1423 static int rose_info_show(struct seq_file *seq, void *v)
1424 {
1425 char buf[11], rsbuf[11];
1426
1427 if (v == SEQ_START_TOKEN)
1428 seq_puts(seq,
1429 "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");
1430
1431 else {
1432 struct sock *s = sk_entry(v);
1433 struct rose_sock *rose = rose_sk(s);
1434 const char *devname, *callsign;
1435 const struct net_device *dev = rose->device;
1436
1437 if (!dev)
1438 devname = "???";
1439 else
1440 devname = dev->name;
1441
1442 seq_printf(seq, "%-10s %-9s ",
1443 rose2asc(rsbuf, &rose->dest_addr),
1444 ax2asc(buf, &rose->dest_call));
1445
1446 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1447 callsign = "??????-?";
1448 else
1449 callsign = ax2asc(buf, &rose->source_call);
1450
1451 seq_printf(seq,
1452 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1453 rose2asc(rsbuf, &rose->source_addr),
1454 callsign,
1455 devname,
1456 rose->lci & 0x0FFF,
1457 (rose->neighbour) ? rose->neighbour->number : 0,
1458 rose->state,
1459 rose->vs,
1460 rose->vr,
1461 rose->va,
1462 ax25_display_timer(&rose->timer) / HZ,
1463 rose->t1 / HZ,
1464 rose->t2 / HZ,
1465 rose->t3 / HZ,
1466 rose->hb / HZ,
1467 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1468 rose->idle / (60 * HZ),
1469 sk_wmem_alloc_get(s),
1470 sk_rmem_alloc_get(s),
1471 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1472 }
1473
1474 return 0;
1475 }
1476
1477 static const struct seq_operations rose_info_seqops = {
1478 .start = rose_info_start,
1479 .next = rose_info_next,
1480 .stop = rose_info_stop,
1481 .show = rose_info_show,
1482 };
1483
1484 static int rose_info_open(struct inode *inode, struct file *file)
1485 {
1486 return seq_open(file, &rose_info_seqops);
1487 }
1488
1489 static const struct file_operations rose_info_fops = {
1490 .owner = THIS_MODULE,
1491 .open = rose_info_open,
1492 .read = seq_read,
1493 .llseek = seq_lseek,
1494 .release = seq_release,
1495 };
1496 #endif /* CONFIG_PROC_FS */
1497
1498 static const struct net_proto_family rose_family_ops = {
1499 .family = PF_ROSE,
1500 .create = rose_create,
1501 .owner = THIS_MODULE,
1502 };
1503
1504 static const struct proto_ops rose_proto_ops = {
1505 .family = PF_ROSE,
1506 .owner = THIS_MODULE,
1507 .release = rose_release,
1508 .bind = rose_bind,
1509 .connect = rose_connect,
1510 .socketpair = sock_no_socketpair,
1511 .accept = rose_accept,
1512 .getname = rose_getname,
1513 .poll = datagram_poll,
1514 .ioctl = rose_ioctl,
1515 .listen = rose_listen,
1516 .shutdown = sock_no_shutdown,
1517 .setsockopt = rose_setsockopt,
1518 .getsockopt = rose_getsockopt,
1519 .sendmsg = rose_sendmsg,
1520 .recvmsg = rose_recvmsg,
1521 .mmap = sock_no_mmap,
1522 .sendpage = sock_no_sendpage,
1523 };
1524
1525 static struct notifier_block rose_dev_notifier = {
1526 .notifier_call = rose_device_event,
1527 };
1528
1529 static struct net_device **dev_rose;
1530
1531 static struct ax25_protocol rose_pid = {
1532 .pid = AX25_P_ROSE,
1533 .func = rose_route_frame
1534 };
1535
1536 static struct ax25_linkfail rose_linkfail_notifier = {
1537 .func = rose_link_failed
1538 };
1539
1540 static int __init rose_proto_init(void)
1541 {
1542 int i;
1543 int rc;
1544
1545 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1546 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1547 rc = -EINVAL;
1548 goto out;
1549 }
1550
1551 rc = proto_register(&rose_proto, 0);
1552 if (rc != 0)
1553 goto out;
1554
1555 rose_callsign = null_ax25_address;
1556
1557 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1558 if (dev_rose == NULL) {
1559 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1560 rc = -ENOMEM;
1561 goto out_proto_unregister;
1562 }
1563
1564 for (i = 0; i < rose_ndevs; i++) {
1565 struct net_device *dev;
1566 char name[IFNAMSIZ];
1567
1568 sprintf(name, "rose%d", i);
1569 dev = alloc_netdev(0, name, rose_setup);
1570 if (!dev) {
1571 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1572 rc = -ENOMEM;
1573 goto fail;
1574 }
1575 rc = register_netdev(dev);
1576 if (rc) {
1577 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1578 free_netdev(dev);
1579 goto fail;
1580 }
1581 rose_set_lockdep_key(dev);
1582 dev_rose[i] = dev;
1583 }
1584
1585 sock_register(&rose_family_ops);
1586 register_netdevice_notifier(&rose_dev_notifier);
1587
1588 ax25_register_pid(&rose_pid);
1589 ax25_linkfail_register(&rose_linkfail_notifier);
1590
1591 #ifdef CONFIG_SYSCTL
1592 rose_register_sysctl();
1593 #endif
1594 rose_loopback_init();
1595
1596 rose_add_loopback_neigh();
1597
1598 proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1599 proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1600 proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1601 proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1602 out:
1603 return rc;
1604 fail:
1605 while (--i >= 0) {
1606 unregister_netdev(dev_rose[i]);
1607 free_netdev(dev_rose[i]);
1608 }
1609 kfree(dev_rose);
1610 out_proto_unregister:
1611 proto_unregister(&rose_proto);
1612 goto out;
1613 }
1614 module_init(rose_proto_init);
1615
1616 module_param(rose_ndevs, int, 0);
1617 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1618
1619 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1620 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1621 MODULE_LICENSE("GPL");
1622 MODULE_ALIAS_NETPROTO(PF_ROSE);
1623
1624 static void __exit rose_exit(void)
1625 {
1626 int i;
1627
1628 proc_net_remove(&init_net, "rose");
1629 proc_net_remove(&init_net, "rose_neigh");
1630 proc_net_remove(&init_net, "rose_nodes");
1631 proc_net_remove(&init_net, "rose_routes");
1632 rose_loopback_clear();
1633
1634 rose_rt_free();
1635
1636 ax25_protocol_release(AX25_P_ROSE);
1637 ax25_linkfail_release(&rose_linkfail_notifier);
1638
1639 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1640 ax25_listen_release(&rose_callsign, NULL);
1641
1642 #ifdef CONFIG_SYSCTL
1643 rose_unregister_sysctl();
1644 #endif
1645 unregister_netdevice_notifier(&rose_dev_notifier);
1646
1647 sock_unregister(PF_ROSE);
1648
1649 for (i = 0; i < rose_ndevs; i++) {
1650 struct net_device *dev = dev_rose[i];
1651
1652 if (dev) {
1653 unregister_netdev(dev);
1654 free_netdev(dev);
1655 }
1656 }
1657
1658 kfree(dev_rose);
1659 proto_unregister(&rose_proto);
1660 }
1661
1662 module_exit(rose_exit);
Linux with added FPC-III support