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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / net / rose / af_rose.c
blobf9293c761816735b1de9d2c15d24906c17ac1588
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
78 /*
79 * Convert a ROSE address into text.
80 */
81 const char *rose2asc(const rose_address *addr)
82 {
83 static char buffer[11];
84
85 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
86 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
87 addr->rose_addr[4] == 0x00) {
88 strcpy(buffer, "*");
89 } else {
90 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
91 addr->rose_addr[1] & 0xFF,
92 addr->rose_addr[2] & 0xFF,
93 addr->rose_addr[3] & 0xFF,
94 addr->rose_addr[4] & 0xFF);
95 }
96
97 return buffer;
98 }
99
100 /*
101 * Compare two ROSE addresses, 0 == equal.
102 */
103 int rosecmp(rose_address *addr1, rose_address *addr2)
104 {
105 int i;
106
107 for (i = 0; i < 5; i++)
108 if (addr1->rose_addr[i] != addr2->rose_addr[i])
109 return 1;
110
111 return 0;
112 }
113
114 /*
115 * Compare two ROSE addresses for only mask digits, 0 == equal.
116 */
117 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
118 {
119 unsigned int i, j;
120
121 if (mask > 10)
122 return 1;
123
124 for (i = 0; i < mask; i++) {
125 j = i / 2;
126
127 if ((i % 2) != 0) {
128 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
129 return 1;
130 } else {
131 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
132 return 1;
133 }
134 }
135
136 return 0;
137 }
138
139 /*
140 * Socket removal during an interrupt is now safe.
141 */
142 static void rose_remove_socket(struct sock *sk)
143 {
144 spin_lock_bh(&rose_list_lock);
145 sk_del_node_init(sk);
146 spin_unlock_bh(&rose_list_lock);
147 }
148
149 /*
150 * Kill all bound sockets on a broken link layer connection to a
151 * particular neighbour.
152 */
153 void rose_kill_by_neigh(struct rose_neigh *neigh)
154 {
155 struct sock *s;
156 struct hlist_node *node;
157
158 spin_lock_bh(&rose_list_lock);
159 sk_for_each(s, node, &rose_list) {
160 struct rose_sock *rose = rose_sk(s);
161
162 if (rose->neighbour == neigh) {
163 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
164 rose->neighbour->use--;
165 rose->neighbour = NULL;
166 }
167 }
168 spin_unlock_bh(&rose_list_lock);
169 }
170
171 /*
172 * Kill all bound sockets on a dropped device.
173 */
174 static void rose_kill_by_device(struct net_device *dev)
175 {
176 struct sock *s;
177 struct hlist_node *node;
178
179 spin_lock_bh(&rose_list_lock);
180 sk_for_each(s, node, &rose_list) {
181 struct rose_sock *rose = rose_sk(s);
182
183 if (rose->device == dev) {
184 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
185 rose->neighbour->use--;
186 rose->device = NULL;
187 }
188 }
189 spin_unlock_bh(&rose_list_lock);
190 }
191
192 /*
193 * Handle device status changes.
194 */
195 static int rose_device_event(struct notifier_block *this, unsigned long event,
196 void *ptr)
197 {
198 struct net_device *dev = (struct net_device *)ptr;
199
200 if (dev->nd_net != &init_net)
201 return NOTIFY_DONE;
202
203 if (event != NETDEV_DOWN)
204 return NOTIFY_DONE;
205
206 switch (dev->type) {
207 case ARPHRD_ROSE:
208 rose_kill_by_device(dev);
209 break;
210 case ARPHRD_AX25:
211 rose_link_device_down(dev);
212 rose_rt_device_down(dev);
213 break;
214 }
215
216 return NOTIFY_DONE;
217 }
218
219 /*
220 * Add a socket to the bound sockets list.
221 */
222 static void rose_insert_socket(struct sock *sk)
223 {
224
225 spin_lock_bh(&rose_list_lock);
226 sk_add_node(sk, &rose_list);
227 spin_unlock_bh(&rose_list_lock);
228 }
229
230 /*
231 * Find a socket that wants to accept the Call Request we just
232 * received.
233 */
234 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
235 {
236 struct sock *s;
237 struct hlist_node *node;
238
239 spin_lock_bh(&rose_list_lock);
240 sk_for_each(s, node, &rose_list) {
241 struct rose_sock *rose = rose_sk(s);
242
243 if (!rosecmp(&rose->source_addr, addr) &&
244 !ax25cmp(&rose->source_call, call) &&
245 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
246 goto found;
247 }
248
249 sk_for_each(s, node, &rose_list) {
250 struct rose_sock *rose = rose_sk(s);
251
252 if (!rosecmp(&rose->source_addr, addr) &&
253 !ax25cmp(&rose->source_call, &null_ax25_address) &&
254 s->sk_state == TCP_LISTEN)
255 goto found;
256 }
257 s = NULL;
258 found:
259 spin_unlock_bh(&rose_list_lock);
260 return s;
261 }
262
263 /*
264 * Find a connected ROSE socket given my LCI and device.
265 */
266 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
267 {
268 struct sock *s;
269 struct hlist_node *node;
270
271 spin_lock_bh(&rose_list_lock);
272 sk_for_each(s, node, &rose_list) {
273 struct rose_sock *rose = rose_sk(s);
274
275 if (rose->lci == lci && rose->neighbour == neigh)
276 goto found;
277 }
278 s = NULL;
279 found:
280 spin_unlock_bh(&rose_list_lock);
281 return s;
282 }
283
284 /*
285 * Find a unique LCI for a given device.
286 */
287 unsigned int rose_new_lci(struct rose_neigh *neigh)
288 {
289 int lci;
290
291 if (neigh->dce_mode) {
292 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
293 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
294 return lci;
295 } else {
296 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
297 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
298 return lci;
299 }
300
301 return 0;
302 }
303
304 /*
305 * Deferred destroy.
306 */
307 void rose_destroy_socket(struct sock *);
308
309 /*
310 * Handler for deferred kills.
311 */
312 static void rose_destroy_timer(unsigned long data)
313 {
314 rose_destroy_socket((struct sock *)data);
315 }
316
317 /*
318 * This is called from user mode and the timers. Thus it protects itself
319 * against interrupt users but doesn't worry about being called during
320 * work. Once it is removed from the queue no interrupt or bottom half
321 * will touch it and we are (fairly 8-) ) safe.
322 */
323 void rose_destroy_socket(struct sock *sk)
324 {
325 struct sk_buff *skb;
326
327 rose_remove_socket(sk);
328 rose_stop_heartbeat(sk);
329 rose_stop_idletimer(sk);
330 rose_stop_timer(sk);
331
332 rose_clear_queues(sk); /* Flush the queues */
333
334 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
335 if (skb->sk != sk) { /* A pending connection */
336 /* Queue the unaccepted socket for death */
337 sock_set_flag(skb->sk, SOCK_DEAD);
338 rose_start_heartbeat(skb->sk);
339 rose_sk(skb->sk)->state = ROSE_STATE_0;
340 }
341
342 kfree_skb(skb);
343 }
344
345 if (atomic_read(&sk->sk_wmem_alloc) ||
346 atomic_read(&sk->sk_rmem_alloc)) {
347 /* Defer: outstanding buffers */
348 setup_timer(&sk->sk_timer, rose_destroy_timer,
349 (unsigned long)sk);
350 sk->sk_timer.expires = jiffies + 10 * HZ;
351 add_timer(&sk->sk_timer);
352 } else
353 sock_put(sk);
354 }
355
356 /*
357 * Handling for system calls applied via the various interfaces to a
358 * ROSE socket object.
359 */
360
361 static int rose_setsockopt(struct socket *sock, int level, int optname,
362 char __user *optval, int optlen)
363 {
364 struct sock *sk = sock->sk;
365 struct rose_sock *rose = rose_sk(sk);
366 int opt;
367
368 if (level != SOL_ROSE)
369 return -ENOPROTOOPT;
370
371 if (optlen < sizeof(int))
372 return -EINVAL;
373
374 if (get_user(opt, (int __user *)optval))
375 return -EFAULT;
376
377 switch (optname) {
378 case ROSE_DEFER:
379 rose->defer = opt ? 1 : 0;
380 return 0;
381
382 case ROSE_T1:
383 if (opt < 1)
384 return -EINVAL;
385 rose->t1 = opt * HZ;
386 return 0;
387
388 case ROSE_T2:
389 if (opt < 1)
390 return -EINVAL;
391 rose->t2 = opt * HZ;
392 return 0;
393
394 case ROSE_T3:
395 if (opt < 1)
396 return -EINVAL;
397 rose->t3 = opt * HZ;
398 return 0;
399
400 case ROSE_HOLDBACK:
401 if (opt < 1)
402 return -EINVAL;
403 rose->hb = opt * HZ;
404 return 0;
405
406 case ROSE_IDLE:
407 if (opt < 0)
408 return -EINVAL;
409 rose->idle = opt * 60 * HZ;
410 return 0;
411
412 case ROSE_QBITINCL:
413 rose->qbitincl = opt ? 1 : 0;
414 return 0;
415
416 default:
417 return -ENOPROTOOPT;
418 }
419 }
420
421 static int rose_getsockopt(struct socket *sock, int level, int optname,
422 char __user *optval, int __user *optlen)
423 {
424 struct sock *sk = sock->sk;
425 struct rose_sock *rose = rose_sk(sk);
426 int val = 0;
427 int len;
428
429 if (level != SOL_ROSE)
430 return -ENOPROTOOPT;
431
432 if (get_user(len, optlen))
433 return -EFAULT;
434
435 if (len < 0)
436 return -EINVAL;
437
438 switch (optname) {
439 case ROSE_DEFER:
440 val = rose->defer;
441 break;
442
443 case ROSE_T1:
444 val = rose->t1 / HZ;
445 break;
446
447 case ROSE_T2:
448 val = rose->t2 / HZ;
449 break;
450
451 case ROSE_T3:
452 val = rose->t3 / HZ;
453 break;
454
455 case ROSE_HOLDBACK:
456 val = rose->hb / HZ;
457 break;
458
459 case ROSE_IDLE:
460 val = rose->idle / (60 * HZ);
461 break;
462
463 case ROSE_QBITINCL:
464 val = rose->qbitincl;
465 break;
466
467 default:
468 return -ENOPROTOOPT;
469 }
470
471 len = min_t(unsigned int, len, sizeof(int));
472
473 if (put_user(len, optlen))
474 return -EFAULT;
475
476 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
477 }
478
479 static int rose_listen(struct socket *sock, int backlog)
480 {
481 struct sock *sk = sock->sk;
482
483 if (sk->sk_state != TCP_LISTEN) {
484 struct rose_sock *rose = rose_sk(sk);
485
486 rose->dest_ndigis = 0;
487 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
488 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
489 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
490 sk->sk_max_ack_backlog = backlog;
491 sk->sk_state = TCP_LISTEN;
492 return 0;
493 }
494
495 return -EOPNOTSUPP;
496 }
497
498 static struct proto rose_proto = {
499 .name = "ROSE",
500 .owner = THIS_MODULE,
501 .obj_size = sizeof(struct rose_sock),
502 };
503
504 static int rose_create(struct net *net, struct socket *sock, int protocol)
505 {
506 struct sock *sk;
507 struct rose_sock *rose;
508
509 if (net != &init_net)
510 return -EAFNOSUPPORT;
511
512 if (sock->type != SOCK_SEQPACKET || protocol != 0)
513 return -ESOCKTNOSUPPORT;
514
515 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
516 if (sk == NULL)
517 return -ENOMEM;
518
519 rose = rose_sk(sk);
520
521 sock_init_data(sock, sk);
522
523 skb_queue_head_init(&rose->ack_queue);
524 #ifdef M_BIT
525 skb_queue_head_init(&rose->frag_queue);
526 rose->fraglen = 0;
527 #endif
528
529 sock->ops = &rose_proto_ops;
530 sk->sk_protocol = protocol;
531
532 init_timer(&rose->timer);
533 init_timer(&rose->idletimer);
534
535 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
536 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
537 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
538 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
539 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
540
541 rose->state = ROSE_STATE_0;
542
543 return 0;
544 }
545
546 static struct sock *rose_make_new(struct sock *osk)
547 {
548 struct sock *sk;
549 struct rose_sock *rose, *orose;
550
551 if (osk->sk_type != SOCK_SEQPACKET)
552 return NULL;
553
554 sk = sk_alloc(osk->sk_net, PF_ROSE, GFP_ATOMIC, &rose_proto);
555 if (sk == NULL)
556 return NULL;
557
558 rose = rose_sk(sk);
559
560 sock_init_data(NULL, sk);
561
562 skb_queue_head_init(&rose->ack_queue);
563 #ifdef M_BIT
564 skb_queue_head_init(&rose->frag_queue);
565 rose->fraglen = 0;
566 #endif
567
568 sk->sk_type = osk->sk_type;
569 sk->sk_socket = osk->sk_socket;
570 sk->sk_priority = osk->sk_priority;
571 sk->sk_protocol = osk->sk_protocol;
572 sk->sk_rcvbuf = osk->sk_rcvbuf;
573 sk->sk_sndbuf = osk->sk_sndbuf;
574 sk->sk_state = TCP_ESTABLISHED;
575 sk->sk_sleep = osk->sk_sleep;
576 sock_copy_flags(sk, osk);
577
578 init_timer(&rose->timer);
579 init_timer(&rose->idletimer);
580
581 orose = rose_sk(osk);
582 rose->t1 = orose->t1;
583 rose->t2 = orose->t2;
584 rose->t3 = orose->t3;
585 rose->hb = orose->hb;
586 rose->idle = orose->idle;
587 rose->defer = orose->defer;
588 rose->device = orose->device;
589 rose->qbitincl = orose->qbitincl;
590
591 return sk;
592 }
593
594 static int rose_release(struct socket *sock)
595 {
596 struct sock *sk = sock->sk;
597 struct rose_sock *rose;
598
599 if (sk == NULL) return 0;
600
601 sock_hold(sk);
602 sock_orphan(sk);
603 lock_sock(sk);
604 rose = rose_sk(sk);
605
606 switch (rose->state) {
607 case ROSE_STATE_0:
608 release_sock(sk);
609 rose_disconnect(sk, 0, -1, -1);
610 lock_sock(sk);
611 rose_destroy_socket(sk);
612 break;
613
614 case ROSE_STATE_2:
615 rose->neighbour->use--;
616 release_sock(sk);
617 rose_disconnect(sk, 0, -1, -1);
618 lock_sock(sk);
619 rose_destroy_socket(sk);
620 break;
621
622 case ROSE_STATE_1:
623 case ROSE_STATE_3:
624 case ROSE_STATE_4:
625 case ROSE_STATE_5:
626 rose_clear_queues(sk);
627 rose_stop_idletimer(sk);
628 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
629 rose_start_t3timer(sk);
630 rose->state = ROSE_STATE_2;
631 sk->sk_state = TCP_CLOSE;
632 sk->sk_shutdown |= SEND_SHUTDOWN;
633 sk->sk_state_change(sk);
634 sock_set_flag(sk, SOCK_DEAD);
635 sock_set_flag(sk, SOCK_DESTROY);
636 break;
637
638 default:
639 break;
640 }
641
642 sock->sk = NULL;
643 release_sock(sk);
644 sock_put(sk);
645
646 return 0;
647 }
648
649 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
650 {
651 struct sock *sk = sock->sk;
652 struct rose_sock *rose = rose_sk(sk);
653 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
654 struct net_device *dev;
655 ax25_address *source;
656 ax25_uid_assoc *user;
657 int n;
658
659 if (!sock_flag(sk, SOCK_ZAPPED))
660 return -EINVAL;
661
662 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
663 return -EINVAL;
664
665 if (addr->srose_family != AF_ROSE)
666 return -EINVAL;
667
668 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
669 return -EINVAL;
670
671 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
672 return -EINVAL;
673
674 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
675 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
676 return -EADDRNOTAVAIL;
677 }
678
679 source = &addr->srose_call;
680
681 user = ax25_findbyuid(current->euid);
682 if (user) {
683 rose->source_call = user->call;
684 ax25_uid_put(user);
685 } else {
686 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
687 return -EACCES;
688 rose->source_call = *source;
689 }
690
691 rose->source_addr = addr->srose_addr;
692 rose->device = dev;
693 rose->source_ndigis = addr->srose_ndigis;
694
695 if (addr_len == sizeof(struct full_sockaddr_rose)) {
696 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
697 for (n = 0 ; n < addr->srose_ndigis ; n++)
698 rose->source_digis[n] = full_addr->srose_digis[n];
699 } else {
700 if (rose->source_ndigis == 1) {
701 rose->source_digis[0] = addr->srose_digi;
702 }
703 }
704
705 rose_insert_socket(sk);
706
707 sock_reset_flag(sk, SOCK_ZAPPED);
708 SOCK_DEBUG(sk, "ROSE: socket is bound\n");
709 return 0;
710 }
711
712 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
713 {
714 struct sock *sk = sock->sk;
715 struct rose_sock *rose = rose_sk(sk);
716 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
717 unsigned char cause, diagnostic;
718 struct net_device *dev;
719 ax25_uid_assoc *user;
720 int n, err = 0;
721
722 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
723 return -EINVAL;
724
725 if (addr->srose_family != AF_ROSE)
726 return -EINVAL;
727
728 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
729 return -EINVAL;
730
731 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
732 return -EINVAL;
733
734 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
735 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
736 return -EINVAL;
737
738 lock_sock(sk);
739
740 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
741 /* Connect completed during a ERESTARTSYS event */
742 sock->state = SS_CONNECTED;
743 goto out_release;
744 }
745
746 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
747 sock->state = SS_UNCONNECTED;
748 err = -ECONNREFUSED;
749 goto out_release;
750 }
751
752 if (sk->sk_state == TCP_ESTABLISHED) {
753 /* No reconnect on a seqpacket socket */
754 err = -EISCONN;
755 goto out_release;
756 }
757
758 sk->sk_state = TCP_CLOSE;
759 sock->state = SS_UNCONNECTED;
760
761 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
762 &diagnostic);
763 if (!rose->neighbour) {
764 err = -ENETUNREACH;
765 goto out_release;
766 }
767
768 rose->lci = rose_new_lci(rose->neighbour);
769 if (!rose->lci) {
770 err = -ENETUNREACH;
771 goto out_release;
772 }
773
774 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
775 sock_reset_flag(sk, SOCK_ZAPPED);
776
777 if ((dev = rose_dev_first()) == NULL) {
778 err = -ENETUNREACH;
779 goto out_release;
780 }
781
782 user = ax25_findbyuid(current->euid);
783 if (!user) {
784 err = -EINVAL;
785 goto out_release;
786 }
787
788 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
789 rose->source_call = user->call;
790 rose->device = dev;
791 ax25_uid_put(user);
792
793 rose_insert_socket(sk); /* Finish the bind */
794 }
795 rose_try_next_neigh:
796 rose->dest_addr = addr->srose_addr;
797 rose->dest_call = addr->srose_call;
798 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
799 rose->dest_ndigis = addr->srose_ndigis;
800
801 if (addr_len == sizeof(struct full_sockaddr_rose)) {
802 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
803 for (n = 0 ; n < addr->srose_ndigis ; n++)
804 rose->dest_digis[n] = full_addr->srose_digis[n];
805 } else {
806 if (rose->dest_ndigis == 1) {
807 rose->dest_digis[0] = addr->srose_digi;
808 }
809 }
810
811 /* Move to connecting socket, start sending Connect Requests */
812 sock->state = SS_CONNECTING;
813 sk->sk_state = TCP_SYN_SENT;
814
815 rose->state = ROSE_STATE_1;
816
817 rose->neighbour->use++;
818
819 rose_write_internal(sk, ROSE_CALL_REQUEST);
820 rose_start_heartbeat(sk);
821 rose_start_t1timer(sk);
822
823 /* Now the loop */
824 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
825 err = -EINPROGRESS;
826 goto out_release;
827 }
828
829 /*
830 * A Connect Ack with Choke or timeout or failed routing will go to
831 * closed.
832 */
833 if (sk->sk_state == TCP_SYN_SENT) {
834 DEFINE_WAIT(wait);
835
836 for (;;) {
837 prepare_to_wait(sk->sk_sleep, &wait,
838 TASK_INTERRUPTIBLE);
839 if (sk->sk_state != TCP_SYN_SENT)
840 break;
841 if (!signal_pending(current)) {
842 release_sock(sk);
843 schedule();
844 lock_sock(sk);
845 continue;
846 }
847 err = -ERESTARTSYS;
848 break;
849 }
850 finish_wait(sk->sk_sleep, &wait);
851
852 if (err)
853 goto out_release;
854 }
855
856 if (sk->sk_state != TCP_ESTABLISHED) {
857 /* Try next neighbour */
858 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic);
859 if (rose->neighbour)
860 goto rose_try_next_neigh;
861
862 /* No more neighbours */
863 sock->state = SS_UNCONNECTED;
864 err = sock_error(sk); /* Always set at this point */
865 goto out_release;
866 }
867
868 sock->state = SS_CONNECTED;
869
870 out_release:
871 release_sock(sk);
872
873 return err;
874 }
875
876 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
877 {
878 struct sk_buff *skb;
879 struct sock *newsk;
880 DEFINE_WAIT(wait);
881 struct sock *sk;
882 int err = 0;
883
884 if ((sk = sock->sk) == NULL)
885 return -EINVAL;
886
887 lock_sock(sk);
888 if (sk->sk_type != SOCK_SEQPACKET) {
889 err = -EOPNOTSUPP;
890 goto out_release;
891 }
892
893 if (sk->sk_state != TCP_LISTEN) {
894 err = -EINVAL;
895 goto out_release;
896 }
897
898 /*
899 * The write queue this time is holding sockets ready to use
900 * hooked into the SABM we saved
901 */
902 for (;;) {
903 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
904
905 skb = skb_dequeue(&sk->sk_receive_queue);
906 if (skb)
907 break;
908
909 if (flags & O_NONBLOCK) {
910 err = -EWOULDBLOCK;
911 break;
912 }
913 if (!signal_pending(current)) {
914 release_sock(sk);
915 schedule();
916 lock_sock(sk);
917 continue;
918 }
919 err = -ERESTARTSYS;
920 break;
921 }
922 finish_wait(sk->sk_sleep, &wait);
923 if (err)
924 goto out_release;
925
926 newsk = skb->sk;
927 newsk->sk_socket = newsock;
928 newsk->sk_sleep = &newsock->wait;
929
930 /* Now attach up the new socket */
931 skb->sk = NULL;
932 kfree_skb(skb);
933 sk->sk_ack_backlog--;
934 newsock->sk = newsk;
935
936 out_release:
937 release_sock(sk);
938
939 return err;
940 }
941
942 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
943 int *uaddr_len, int peer)
944 {
945 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
946 struct sock *sk = sock->sk;
947 struct rose_sock *rose = rose_sk(sk);
948 int n;
949
950 if (peer != 0) {
951 if (sk->sk_state != TCP_ESTABLISHED)
952 return -ENOTCONN;
953 srose->srose_family = AF_ROSE;
954 srose->srose_addr = rose->dest_addr;
955 srose->srose_call = rose->dest_call;
956 srose->srose_ndigis = rose->dest_ndigis;
957 for (n = 0; n < rose->dest_ndigis; n++)
958 srose->srose_digis[n] = rose->dest_digis[n];
959 } else {
960 srose->srose_family = AF_ROSE;
961 srose->srose_addr = rose->source_addr;
962 srose->srose_call = rose->source_call;
963 srose->srose_ndigis = rose->source_ndigis;
964 for (n = 0; n < rose->source_ndigis; n++)
965 srose->srose_digis[n] = rose->source_digis[n];
966 }
967
968 *uaddr_len = sizeof(struct full_sockaddr_rose);
969 return 0;
970 }
971
972 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
973 {
974 struct sock *sk;
975 struct sock *make;
976 struct rose_sock *make_rose;
977 struct rose_facilities_struct facilities;
978 int n, len;
979
980 skb->sk = NULL; /* Initially we don't know who it's for */
981
982 /*
983 * skb->data points to the rose frame start
984 */
985 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
986
987 len = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
988 len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
989 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
990 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
991 return 0;
992 }
993
994 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
995
996 /*
997 * We can't accept the Call Request.
998 */
999 if (sk == NULL || sk_acceptq_is_full(sk) ||
1000 (make = rose_make_new(sk)) == NULL) {
1001 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1002 return 0;
1003 }
1004
1005 skb->sk = make;
1006 make->sk_state = TCP_ESTABLISHED;
1007 make_rose = rose_sk(make);
1008
1009 make_rose->lci = lci;
1010 make_rose->dest_addr = facilities.dest_addr;
1011 make_rose->dest_call = facilities.dest_call;
1012 make_rose->dest_ndigis = facilities.dest_ndigis;
1013 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1014 make_rose->dest_digis[n] = facilities.dest_digis[n];
1015 make_rose->source_addr = facilities.source_addr;
1016 make_rose->source_call = facilities.source_call;
1017 make_rose->source_ndigis = facilities.source_ndigis;
1018 for (n = 0 ; n < facilities.source_ndigis ; n++)
1019 make_rose->source_digis[n]= facilities.source_digis[n];
1020 make_rose->neighbour = neigh;
1021 make_rose->device = dev;
1022 make_rose->facilities = facilities;
1023
1024 make_rose->neighbour->use++;
1025
1026 if (rose_sk(sk)->defer) {
1027 make_rose->state = ROSE_STATE_5;
1028 } else {
1029 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1030 make_rose->state = ROSE_STATE_3;
1031 rose_start_idletimer(make);
1032 }
1033
1034 make_rose->condition = 0x00;
1035 make_rose->vs = 0;
1036 make_rose->va = 0;
1037 make_rose->vr = 0;
1038 make_rose->vl = 0;
1039 sk->sk_ack_backlog++;
1040
1041 rose_insert_socket(make);
1042
1043 skb_queue_head(&sk->sk_receive_queue, skb);
1044
1045 rose_start_heartbeat(make);
1046
1047 if (!sock_flag(sk, SOCK_DEAD))
1048 sk->sk_data_ready(sk, skb->len);
1049
1050 return 1;
1051 }
1052
1053 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1054 struct msghdr *msg, size_t len)
1055 {
1056 struct sock *sk = sock->sk;
1057 struct rose_sock *rose = rose_sk(sk);
1058 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1059 int err;
1060 struct full_sockaddr_rose srose;
1061 struct sk_buff *skb;
1062 unsigned char *asmptr;
1063 int n, size, qbit = 0;
1064
1065 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1066 return -EINVAL;
1067
1068 if (sock_flag(sk, SOCK_ZAPPED))
1069 return -EADDRNOTAVAIL;
1070
1071 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1072 send_sig(SIGPIPE, current, 0);
1073 return -EPIPE;
1074 }
1075
1076 if (rose->neighbour == NULL || rose->device == NULL)
1077 return -ENETUNREACH;
1078
1079 if (usrose != NULL) {
1080 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1081 return -EINVAL;
1082 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1083 memcpy(&srose, usrose, msg->msg_namelen);
1084 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1085 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1086 return -EISCONN;
1087 if (srose.srose_ndigis != rose->dest_ndigis)
1088 return -EISCONN;
1089 if (srose.srose_ndigis == rose->dest_ndigis) {
1090 for (n = 0 ; n < srose.srose_ndigis ; n++)
1091 if (ax25cmp(&rose->dest_digis[n],
1092 &srose.srose_digis[n]))
1093 return -EISCONN;
1094 }
1095 if (srose.srose_family != AF_ROSE)
1096 return -EINVAL;
1097 } else {
1098 if (sk->sk_state != TCP_ESTABLISHED)
1099 return -ENOTCONN;
1100
1101 srose.srose_family = AF_ROSE;
1102 srose.srose_addr = rose->dest_addr;
1103 srose.srose_call = rose->dest_call;
1104 srose.srose_ndigis = rose->dest_ndigis;
1105 for (n = 0 ; n < rose->dest_ndigis ; n++)
1106 srose.srose_digis[n] = rose->dest_digis[n];
1107 }
1108
1109 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1110
1111 /* Build a packet */
1112 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1113 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1114
1115 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1116 return err;
1117
1118 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1119
1120 /*
1121 * Put the data on the end
1122 */
1123 SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1124
1125 skb_reset_transport_header(skb);
1126 skb_put(skb, len);
1127
1128 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1129 if (err) {
1130 kfree_skb(skb);
1131 return err;
1132 }
1133
1134 /*
1135 * If the Q BIT Include socket option is in force, the first
1136 * byte of the user data is the logical value of the Q Bit.
1137 */
1138 if (rose->qbitincl) {
1139 qbit = skb->data[0];
1140 skb_pull(skb, 1);
1141 }
1142
1143 /*
1144 * Push down the ROSE header
1145 */
1146 asmptr = skb_push(skb, ROSE_MIN_LEN);
1147
1148 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1149
1150 /* Build a ROSE Network header */
1151 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1152 asmptr[1] = (rose->lci >> 0) & 0xFF;
1153 asmptr[2] = ROSE_DATA;
1154
1155 if (qbit)
1156 asmptr[0] |= ROSE_Q_BIT;
1157
1158 SOCK_DEBUG(sk, "ROSE: Built header.\n");
1159
1160 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1161
1162 if (sk->sk_state != TCP_ESTABLISHED) {
1163 kfree_skb(skb);
1164 return -ENOTCONN;
1165 }
1166
1167 #ifdef M_BIT
1168 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1169 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1170 unsigned char header[ROSE_MIN_LEN];
1171 struct sk_buff *skbn;
1172 int frontlen;
1173 int lg;
1174
1175 /* Save a copy of the Header */
1176 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1177 skb_pull(skb, ROSE_MIN_LEN);
1178
1179 frontlen = skb_headroom(skb);
1180
1181 while (skb->len > 0) {
1182 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1183 kfree_skb(skb);
1184 return err;
1185 }
1186
1187 skbn->sk = sk;
1188 skbn->free = 1;
1189 skbn->arp = 1;
1190
1191 skb_reserve(skbn, frontlen);
1192
1193 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1194
1195 /* Copy the user data */
1196 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1197 skb_pull(skb, lg);
1198
1199 /* Duplicate the Header */
1200 skb_push(skbn, ROSE_MIN_LEN);
1201 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1202
1203 if (skb->len > 0)
1204 skbn->data[2] |= M_BIT;
1205
1206 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1207 }
1208
1209 skb->free = 1;
1210 kfree_skb(skb);
1211 } else {
1212 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1213 }
1214 #else
1215 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1216 #endif
1217
1218 rose_kick(sk);
1219
1220 return len;
1221 }
1222
1223
1224 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1225 struct msghdr *msg, size_t size, int flags)
1226 {
1227 struct sock *sk = sock->sk;
1228 struct rose_sock *rose = rose_sk(sk);
1229 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1230 size_t copied;
1231 unsigned char *asmptr;
1232 struct sk_buff *skb;
1233 int n, er, qbit;
1234
1235 /*
1236 * This works for seqpacket too. The receiver has ordered the queue for
1237 * us! We do one quick check first though
1238 */
1239 if (sk->sk_state != TCP_ESTABLISHED)
1240 return -ENOTCONN;
1241
1242 /* Now we can treat all alike */
1243 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1244 return er;
1245
1246 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1247
1248 skb_pull(skb, ROSE_MIN_LEN);
1249
1250 if (rose->qbitincl) {
1251 asmptr = skb_push(skb, 1);
1252 *asmptr = qbit;
1253 }
1254
1255 skb_reset_transport_header(skb);
1256 copied = skb->len;
1257
1258 if (copied > size) {
1259 copied = size;
1260 msg->msg_flags |= MSG_TRUNC;
1261 }
1262
1263 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1264
1265 if (srose != NULL) {
1266 srose->srose_family = AF_ROSE;
1267 srose->srose_addr = rose->dest_addr;
1268 srose->srose_call = rose->dest_call;
1269 srose->srose_ndigis = rose->dest_ndigis;
1270 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1271 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1272 for (n = 0 ; n < rose->dest_ndigis ; n++)
1273 full_srose->srose_digis[n] = rose->dest_digis[n];
1274 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1275 } else {
1276 if (rose->dest_ndigis >= 1) {
1277 srose->srose_ndigis = 1;
1278 srose->srose_digi = rose->dest_digis[0];
1279 }
1280 msg->msg_namelen = sizeof(struct sockaddr_rose);
1281 }
1282 }
1283
1284 skb_free_datagram(sk, skb);
1285
1286 return copied;
1287 }
1288
1289
1290 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1291 {
1292 struct sock *sk = sock->sk;
1293 struct rose_sock *rose = rose_sk(sk);
1294 void __user *argp = (void __user *)arg;
1295
1296 switch (cmd) {
1297 case TIOCOUTQ: {
1298 long amount;
1299 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1300 if (amount < 0)
1301 amount = 0;
1302 return put_user(amount, (unsigned int __user *) argp);
1303 }
1304
1305 case TIOCINQ: {
1306 struct sk_buff *skb;
1307 long amount = 0L;
1308 /* These two are safe on a single CPU system as only user tasks fiddle here */
1309 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1310 amount = skb->len;
1311 return put_user(amount, (unsigned int __user *) argp);
1312 }
1313
1314 case SIOCGSTAMP:
1315 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1316
1317 case SIOCGSTAMPNS:
1318 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1319
1320 case SIOCGIFADDR:
1321 case SIOCSIFADDR:
1322 case SIOCGIFDSTADDR:
1323 case SIOCSIFDSTADDR:
1324 case SIOCGIFBRDADDR:
1325 case SIOCSIFBRDADDR:
1326 case SIOCGIFNETMASK:
1327 case SIOCSIFNETMASK:
1328 case SIOCGIFMETRIC:
1329 case SIOCSIFMETRIC:
1330 return -EINVAL;
1331
1332 case SIOCADDRT:
1333 case SIOCDELRT:
1334 case SIOCRSCLRRT:
1335 if (!capable(CAP_NET_ADMIN))
1336 return -EPERM;
1337 return rose_rt_ioctl(cmd, argp);
1338
1339 case SIOCRSGCAUSE: {
1340 struct rose_cause_struct rose_cause;
1341 rose_cause.cause = rose->cause;
1342 rose_cause.diagnostic = rose->diagnostic;
1343 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1344 }
1345
1346 case SIOCRSSCAUSE: {
1347 struct rose_cause_struct rose_cause;
1348 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1349 return -EFAULT;
1350 rose->cause = rose_cause.cause;
1351 rose->diagnostic = rose_cause.diagnostic;
1352 return 0;
1353 }
1354
1355 case SIOCRSSL2CALL:
1356 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1357 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1358 ax25_listen_release(&rose_callsign, NULL);
1359 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1360 return -EFAULT;
1361 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1362 return ax25_listen_register(&rose_callsign, NULL);
1363
1364 return 0;
1365
1366 case SIOCRSGL2CALL:
1367 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1368
1369 case SIOCRSACCEPT:
1370 if (rose->state == ROSE_STATE_5) {
1371 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1372 rose_start_idletimer(sk);
1373 rose->condition = 0x00;
1374 rose->vs = 0;
1375 rose->va = 0;
1376 rose->vr = 0;
1377 rose->vl = 0;
1378 rose->state = ROSE_STATE_3;
1379 }
1380 return 0;
1381
1382 default:
1383 return -ENOIOCTLCMD;
1384 }
1385
1386 return 0;
1387 }
1388
1389 #ifdef CONFIG_PROC_FS
1390 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1391 __acquires(rose_list_lock)
1392 {
1393 int i;
1394 struct sock *s;
1395 struct hlist_node *node;
1396
1397 spin_lock_bh(&rose_list_lock);
1398 if (*pos == 0)
1399 return SEQ_START_TOKEN;
1400
1401 i = 1;
1402 sk_for_each(s, node, &rose_list) {
1403 if (i == *pos)
1404 return s;
1405 ++i;
1406 }
1407 return NULL;
1408 }
1409
1410 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1411 {
1412 ++*pos;
1413
1414 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1415 : sk_next((struct sock *)v);
1416 }
1417
1418 static void rose_info_stop(struct seq_file *seq, void *v)
1419 __releases(rose_list_lock)
1420 {
1421 spin_unlock_bh(&rose_list_lock);
1422 }
1423
1424 static int rose_info_show(struct seq_file *seq, void *v)
1425 {
1426 char buf[11];
1427
1428 if (v == SEQ_START_TOKEN)
1429 seq_puts(seq,
1430 "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");
1431
1432 else {
1433 struct sock *s = v;
1434 struct rose_sock *rose = rose_sk(s);
1435 const char *devname, *callsign;
1436 const struct net_device *dev = rose->device;
1437
1438 if (!dev)
1439 devname = "???";
1440 else
1441 devname = dev->name;
1442
1443 seq_printf(seq, "%-10s %-9s ",
1444 rose2asc(&rose->dest_addr),
1445 ax2asc(buf, &rose->dest_call));
1446
1447 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1448 callsign = "??????-?";
1449 else
1450 callsign = ax2asc(buf, &rose->source_call);
1451
1452 seq_printf(seq,
1453 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1454 rose2asc(&rose->source_addr),
1455 callsign,
1456 devname,
1457 rose->lci & 0x0FFF,
1458 (rose->neighbour) ? rose->neighbour->number : 0,
1459 rose->state,
1460 rose->vs,
1461 rose->vr,
1462 rose->va,
1463 ax25_display_timer(&rose->timer) / HZ,
1464 rose->t1 / HZ,
1465 rose->t2 / HZ,
1466 rose->t3 / HZ,
1467 rose->hb / HZ,
1468 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1469 rose->idle / (60 * HZ),
1470 atomic_read(&s->sk_wmem_alloc),
1471 atomic_read(&s->sk_rmem_alloc),
1472 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1473 }
1474
1475 return 0;
1476 }
1477
1478 static const struct seq_operations rose_info_seqops = {
1479 .start = rose_info_start,
1480 .next = rose_info_next,
1481 .stop = rose_info_stop,
1482 .show = rose_info_show,
1483 };
1484
1485 static int rose_info_open(struct inode *inode, struct file *file)
1486 {
1487 return seq_open(file, &rose_info_seqops);
1488 }
1489
1490 static const struct file_operations rose_info_fops = {
1491 .owner = THIS_MODULE,
1492 .open = rose_info_open,
1493 .read = seq_read,
1494 .llseek = seq_lseek,
1495 .release = seq_release,
1496 };
1497 #endif /* CONFIG_PROC_FS */
1498
1499 static struct net_proto_family rose_family_ops = {
1500 .family = PF_ROSE,
1501 .create = rose_create,
1502 .owner = THIS_MODULE,
1503 };
1504
1505 static struct proto_ops rose_proto_ops = {
1506 .family = PF_ROSE,
1507 .owner = THIS_MODULE,
1508 .release = rose_release,
1509 .bind = rose_bind,
1510 .connect = rose_connect,
1511 .socketpair = sock_no_socketpair,
1512 .accept = rose_accept,
1513 .getname = rose_getname,
1514 .poll = datagram_poll,
1515 .ioctl = rose_ioctl,
1516 .listen = rose_listen,
1517 .shutdown = sock_no_shutdown,
1518 .setsockopt = rose_setsockopt,
1519 .getsockopt = rose_getsockopt,
1520 .sendmsg = rose_sendmsg,
1521 .recvmsg = rose_recvmsg,
1522 .mmap = sock_no_mmap,
1523 .sendpage = sock_no_sendpage,
1524 };
1525
1526 static struct notifier_block rose_dev_notifier = {
1527 .notifier_call = rose_device_event,
1528 };
1529
1530 static struct net_device **dev_rose;
1531
1532 static struct ax25_protocol rose_pid = {
1533 .pid = AX25_P_ROSE,
1534 .func = rose_route_frame
1535 };
1536
1537 static struct ax25_linkfail rose_linkfail_notifier = {
1538 .func = rose_link_failed
1539 };
1540
1541 static int __init rose_proto_init(void)
1542 {
1543 int i;
1544 int rc;
1545
1546 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1547 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1548 rc = -EINVAL;
1549 goto out;
1550 }
1551
1552 rc = proto_register(&rose_proto, 0);
1553 if (rc != 0)
1554 goto out;
1555
1556 rose_callsign = null_ax25_address;
1557
1558 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1559 if (dev_rose == NULL) {
1560 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1561 rc = -ENOMEM;
1562 goto out_proto_unregister;
1563 }
1564
1565 for (i = 0; i < rose_ndevs; i++) {
1566 struct net_device *dev;
1567 char name[IFNAMSIZ];
1568
1569 sprintf(name, "rose%d", i);
1570 dev = alloc_netdev(sizeof(struct net_device_stats),
1571 name, rose_setup);
1572 if (!dev) {
1573 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1574 rc = -ENOMEM;
1575 goto fail;
1576 }
1577 rc = register_netdev(dev);
1578 if (rc) {
1579 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1580 free_netdev(dev);
1581 goto fail;
1582 }
1583 lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key);
1584 dev_rose[i] = dev;
1585 }
1586
1587 sock_register(&rose_family_ops);
1588 register_netdevice_notifier(&rose_dev_notifier);
1589
1590 ax25_register_pid(&rose_pid);
1591 ax25_linkfail_register(&rose_linkfail_notifier);
1592
1593 #ifdef CONFIG_SYSCTL
1594 rose_register_sysctl();
1595 #endif
1596 rose_loopback_init();
1597
1598 rose_add_loopback_neigh();
1599
1600 proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1601 proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1602 proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1603 proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1604 out:
1605 return rc;
1606 fail:
1607 while (--i >= 0) {
1608 unregister_netdev(dev_rose[i]);
1609 free_netdev(dev_rose[i]);
1610 }
1611 kfree(dev_rose);
1612 out_proto_unregister:
1613 proto_unregister(&rose_proto);
1614 goto out;
1615 }
1616 module_init(rose_proto_init);
1617
1618 module_param(rose_ndevs, int, 0);
1619 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1620
1621 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1622 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1623 MODULE_LICENSE("GPL");
1624 MODULE_ALIAS_NETPROTO(PF_ROSE);
1625
1626 static void __exit rose_exit(void)
1627 {
1628 int i;
1629
1630 proc_net_remove(&init_net, "rose");
1631 proc_net_remove(&init_net, "rose_neigh");
1632 proc_net_remove(&init_net, "rose_nodes");
1633 proc_net_remove(&init_net, "rose_routes");
1634 rose_loopback_clear();
1635
1636 rose_rt_free();
1637
1638 ax25_protocol_release(AX25_P_ROSE);
1639 ax25_linkfail_release(&rose_linkfail_notifier);
1640
1641 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1642 ax25_listen_release(&rose_callsign, NULL);
1643
1644 #ifdef CONFIG_SYSCTL
1645 rose_unregister_sysctl();
1646 #endif
1647 unregister_netdevice_notifier(&rose_dev_notifier);
1648
1649 sock_unregister(PF_ROSE);
1650
1651 for (i = 0; i < rose_ndevs; i++) {
1652 struct net_device *dev = dev_rose[i];
1653
1654 if (dev) {
1655 unregister_netdev(dev);
1656 free_netdev(dev);
1657 }
1658 }
1659
1660 kfree(dev_rose);
1661 proto_unregister(&rose_proto);
1662 }
1663
1664 module_exit(rose_exit);
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