xref: /linux/net/rose/af_rose.c (revision f2ee442115c9b6219083c019939a9cc0c9abb2f8)
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 ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
683 		return -EINVAL;
684 
685 	if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
686 		return -EADDRNOTAVAIL;
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 
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 ((unsigned int) 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->dest_addr   = addr->srose_addr;
805 	rose->dest_call   = addr->srose_call;
806 	rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
807 	rose->dest_ndigis = addr->srose_ndigis;
808 
809 	if (addr_len == sizeof(struct full_sockaddr_rose)) {
810 		struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
811 		for (n = 0 ; n < addr->srose_ndigis ; n++)
812 			rose->dest_digis[n] = full_addr->srose_digis[n];
813 	} else {
814 		if (rose->dest_ndigis == 1) {
815 			rose->dest_digis[0] = addr->srose_digi;
816 		}
817 	}
818 
819 	/* Move to connecting socket, start sending Connect Requests */
820 	sock->state   = SS_CONNECTING;
821 	sk->sk_state     = TCP_SYN_SENT;
822 
823 	rose->state = ROSE_STATE_1;
824 
825 	rose->neighbour->use++;
826 
827 	rose_write_internal(sk, ROSE_CALL_REQUEST);
828 	rose_start_heartbeat(sk);
829 	rose_start_t1timer(sk);
830 
831 	/* Now the loop */
832 	if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
833 		err = -EINPROGRESS;
834 		goto out_release;
835 	}
836 
837 	/*
838 	 * A Connect Ack with Choke or timeout or failed routing will go to
839 	 * closed.
840 	 */
841 	if (sk->sk_state == TCP_SYN_SENT) {
842 		DEFINE_WAIT(wait);
843 
844 		for (;;) {
845 			prepare_to_wait(sk_sleep(sk), &wait,
846 					TASK_INTERRUPTIBLE);
847 			if (sk->sk_state != TCP_SYN_SENT)
848 				break;
849 			if (!signal_pending(current)) {
850 				release_sock(sk);
851 				schedule();
852 				lock_sock(sk);
853 				continue;
854 			}
855 			err = -ERESTARTSYS;
856 			break;
857 		}
858 		finish_wait(sk_sleep(sk), &wait);
859 
860 		if (err)
861 			goto out_release;
862 	}
863 
864 	if (sk->sk_state != TCP_ESTABLISHED) {
865 		sock->state = SS_UNCONNECTED;
866 		err = sock_error(sk);	/* Always set at this point */
867 		goto out_release;
868 	}
869 
870 	sock->state = SS_CONNECTED;
871 
872 out_release:
873 	release_sock(sk);
874 
875 	return err;
876 }
877 
878 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
879 {
880 	struct sk_buff *skb;
881 	struct sock *newsk;
882 	DEFINE_WAIT(wait);
883 	struct sock *sk;
884 	int err = 0;
885 
886 	if ((sk = sock->sk) == NULL)
887 		return -EINVAL;
888 
889 	lock_sock(sk);
890 	if (sk->sk_type != SOCK_SEQPACKET) {
891 		err = -EOPNOTSUPP;
892 		goto out_release;
893 	}
894 
895 	if (sk->sk_state != TCP_LISTEN) {
896 		err = -EINVAL;
897 		goto out_release;
898 	}
899 
900 	/*
901 	 *	The write queue this time is holding sockets ready to use
902 	 *	hooked into the SABM we saved
903 	 */
904 	for (;;) {
905 		prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
906 
907 		skb = skb_dequeue(&sk->sk_receive_queue);
908 		if (skb)
909 			break;
910 
911 		if (flags & O_NONBLOCK) {
912 			err = -EWOULDBLOCK;
913 			break;
914 		}
915 		if (!signal_pending(current)) {
916 			release_sock(sk);
917 			schedule();
918 			lock_sock(sk);
919 			continue;
920 		}
921 		err = -ERESTARTSYS;
922 		break;
923 	}
924 	finish_wait(sk_sleep(sk), &wait);
925 	if (err)
926 		goto out_release;
927 
928 	newsk = skb->sk;
929 	sock_graft(newsk, newsock);
930 
931 	/* Now attach up the new socket */
932 	skb->sk = NULL;
933 	kfree_skb(skb);
934 	sk->sk_ack_backlog--;
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 	memset(srose, 0, sizeof(*srose));
951 	if (peer != 0) {
952 		if (sk->sk_state != TCP_ESTABLISHED)
953 			return -ENOTCONN;
954 		srose->srose_family = AF_ROSE;
955 		srose->srose_addr   = rose->dest_addr;
956 		srose->srose_call   = rose->dest_call;
957 		srose->srose_ndigis = rose->dest_ndigis;
958 		for (n = 0; n < rose->dest_ndigis; n++)
959 			srose->srose_digis[n] = rose->dest_digis[n];
960 	} else {
961 		srose->srose_family = AF_ROSE;
962 		srose->srose_addr   = rose->source_addr;
963 		srose->srose_call   = rose->source_call;
964 		srose->srose_ndigis = rose->source_ndigis;
965 		for (n = 0; n < rose->source_ndigis; n++)
966 			srose->srose_digis[n] = rose->source_digis[n];
967 	}
968 
969 	*uaddr_len = sizeof(struct full_sockaddr_rose);
970 	return 0;
971 }
972 
973 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
974 {
975 	struct sock *sk;
976 	struct sock *make;
977 	struct rose_sock *make_rose;
978 	struct rose_facilities_struct facilities;
979 	int n;
980 
981 	skb->sk = NULL;		/* Initially we don't know who it's for */
982 
983 	/*
984 	 *	skb->data points to the rose frame start
985 	 */
986 	memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
987 
988 	if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
989 				   skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
990 				   &facilities)) {
991 		rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
992 		return 0;
993 	}
994 
995 	sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
996 
997 	/*
998 	 * We can't accept the Call Request.
999 	 */
1000 	if (sk == NULL || sk_acceptq_is_full(sk) ||
1001 	    (make = rose_make_new(sk)) == NULL) {
1002 		rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1003 		return 0;
1004 	}
1005 
1006 	skb->sk     = make;
1007 	make->sk_state = TCP_ESTABLISHED;
1008 	make_rose = rose_sk(make);
1009 
1010 	make_rose->lci           = lci;
1011 	make_rose->dest_addr     = facilities.dest_addr;
1012 	make_rose->dest_call     = facilities.dest_call;
1013 	make_rose->dest_ndigis   = facilities.dest_ndigis;
1014 	for (n = 0 ; n < facilities.dest_ndigis ; n++)
1015 		make_rose->dest_digis[n] = facilities.dest_digis[n];
1016 	make_rose->source_addr   = facilities.source_addr;
1017 	make_rose->source_call   = facilities.source_call;
1018 	make_rose->source_ndigis = facilities.source_ndigis;
1019 	for (n = 0 ; n < facilities.source_ndigis ; n++)
1020 		make_rose->source_digis[n]= facilities.source_digis[n];
1021 	make_rose->neighbour     = neigh;
1022 	make_rose->device        = dev;
1023 	make_rose->facilities    = facilities;
1024 
1025 	make_rose->neighbour->use++;
1026 
1027 	if (rose_sk(sk)->defer) {
1028 		make_rose->state = ROSE_STATE_5;
1029 	} else {
1030 		rose_write_internal(make, ROSE_CALL_ACCEPTED);
1031 		make_rose->state = ROSE_STATE_3;
1032 		rose_start_idletimer(make);
1033 	}
1034 
1035 	make_rose->condition = 0x00;
1036 	make_rose->vs        = 0;
1037 	make_rose->va        = 0;
1038 	make_rose->vr        = 0;
1039 	make_rose->vl        = 0;
1040 	sk->sk_ack_backlog++;
1041 
1042 	rose_insert_socket(make);
1043 
1044 	skb_queue_head(&sk->sk_receive_queue, skb);
1045 
1046 	rose_start_heartbeat(make);
1047 
1048 	if (!sock_flag(sk, SOCK_DEAD))
1049 		sk->sk_data_ready(sk, skb->len);
1050 
1051 	return 1;
1052 }
1053 
1054 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1055 			struct msghdr *msg, size_t len)
1056 {
1057 	struct sock *sk = sock->sk;
1058 	struct rose_sock *rose = rose_sk(sk);
1059 	struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1060 	int err;
1061 	struct full_sockaddr_rose srose;
1062 	struct sk_buff *skb;
1063 	unsigned char *asmptr;
1064 	int n, size, qbit = 0;
1065 
1066 	if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1067 		return -EINVAL;
1068 
1069 	if (sock_flag(sk, SOCK_ZAPPED))
1070 		return -EADDRNOTAVAIL;
1071 
1072 	if (sk->sk_shutdown & SEND_SHUTDOWN) {
1073 		send_sig(SIGPIPE, current, 0);
1074 		return -EPIPE;
1075 	}
1076 
1077 	if (rose->neighbour == NULL || rose->device == NULL)
1078 		return -ENETUNREACH;
1079 
1080 	if (usrose != NULL) {
1081 		if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1082 			return -EINVAL;
1083 		memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1084 		memcpy(&srose, usrose, msg->msg_namelen);
1085 		if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1086 		    ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1087 			return -EISCONN;
1088 		if (srose.srose_ndigis != rose->dest_ndigis)
1089 			return -EISCONN;
1090 		if (srose.srose_ndigis == rose->dest_ndigis) {
1091 			for (n = 0 ; n < srose.srose_ndigis ; n++)
1092 				if (ax25cmp(&rose->dest_digis[n],
1093 					    &srose.srose_digis[n]))
1094 					return -EISCONN;
1095 		}
1096 		if (srose.srose_family != AF_ROSE)
1097 			return -EINVAL;
1098 	} else {
1099 		if (sk->sk_state != TCP_ESTABLISHED)
1100 			return -ENOTCONN;
1101 
1102 		srose.srose_family = AF_ROSE;
1103 		srose.srose_addr   = rose->dest_addr;
1104 		srose.srose_call   = rose->dest_call;
1105 		srose.srose_ndigis = rose->dest_ndigis;
1106 		for (n = 0 ; n < rose->dest_ndigis ; n++)
1107 			srose.srose_digis[n] = rose->dest_digis[n];
1108 	}
1109 
1110 	/* Build a packet */
1111 	/* Sanity check the packet size */
1112 	if (len > 65535)
1113 		return -EMSGSIZE;
1114 
1115 	size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1116 
1117 	if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1118 		return err;
1119 
1120 	skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1121 
1122 	/*
1123 	 *	Put the data on the end
1124 	 */
1125 
1126 	skb_reset_transport_header(skb);
1127 	skb_put(skb, len);
1128 
1129 	err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1130 	if (err) {
1131 		kfree_skb(skb);
1132 		return err;
1133 	}
1134 
1135 	/*
1136 	 *	If the Q BIT Include socket option is in force, the first
1137 	 *	byte of the user data is the logical value of the Q Bit.
1138 	 */
1139 	if (rose->qbitincl) {
1140 		qbit = skb->data[0];
1141 		skb_pull(skb, 1);
1142 	}
1143 
1144 	/*
1145 	 *	Push down the ROSE header
1146 	 */
1147 	asmptr = skb_push(skb, ROSE_MIN_LEN);
1148 
1149 	/* Build a ROSE Network header */
1150 	asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1151 	asmptr[1] = (rose->lci >> 0) & 0xFF;
1152 	asmptr[2] = ROSE_DATA;
1153 
1154 	if (qbit)
1155 		asmptr[0] |= ROSE_Q_BIT;
1156 
1157 	if (sk->sk_state != TCP_ESTABLISHED) {
1158 		kfree_skb(skb);
1159 		return -ENOTCONN;
1160 	}
1161 
1162 #ifdef M_BIT
1163 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1164 	if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1165 		unsigned char header[ROSE_MIN_LEN];
1166 		struct sk_buff *skbn;
1167 		int frontlen;
1168 		int lg;
1169 
1170 		/* Save a copy of the Header */
1171 		skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1172 		skb_pull(skb, ROSE_MIN_LEN);
1173 
1174 		frontlen = skb_headroom(skb);
1175 
1176 		while (skb->len > 0) {
1177 			if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1178 				kfree_skb(skb);
1179 				return err;
1180 			}
1181 
1182 			skbn->sk   = sk;
1183 			skbn->free = 1;
1184 			skbn->arp  = 1;
1185 
1186 			skb_reserve(skbn, frontlen);
1187 
1188 			lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1189 
1190 			/* Copy the user data */
1191 			skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1192 			skb_pull(skb, lg);
1193 
1194 			/* Duplicate the Header */
1195 			skb_push(skbn, ROSE_MIN_LEN);
1196 			skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1197 
1198 			if (skb->len > 0)
1199 				skbn->data[2] |= M_BIT;
1200 
1201 			skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1202 		}
1203 
1204 		skb->free = 1;
1205 		kfree_skb(skb);
1206 	} else {
1207 		skb_queue_tail(&sk->sk_write_queue, skb);		/* Throw it on the queue */
1208 	}
1209 #else
1210 	skb_queue_tail(&sk->sk_write_queue, skb);	/* Shove it onto the queue */
1211 #endif
1212 
1213 	rose_kick(sk);
1214 
1215 	return len;
1216 }
1217 
1218 
1219 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1220 			struct msghdr *msg, size_t size, int flags)
1221 {
1222 	struct sock *sk = sock->sk;
1223 	struct rose_sock *rose = rose_sk(sk);
1224 	struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1225 	size_t copied;
1226 	unsigned char *asmptr;
1227 	struct sk_buff *skb;
1228 	int n, er, qbit;
1229 
1230 	/*
1231 	 * This works for seqpacket too. The receiver has ordered the queue for
1232 	 * us! We do one quick check first though
1233 	 */
1234 	if (sk->sk_state != TCP_ESTABLISHED)
1235 		return -ENOTCONN;
1236 
1237 	/* Now we can treat all alike */
1238 	if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1239 		return er;
1240 
1241 	qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1242 
1243 	skb_pull(skb, ROSE_MIN_LEN);
1244 
1245 	if (rose->qbitincl) {
1246 		asmptr  = skb_push(skb, 1);
1247 		*asmptr = qbit;
1248 	}
1249 
1250 	skb_reset_transport_header(skb);
1251 	copied     = skb->len;
1252 
1253 	if (copied > size) {
1254 		copied = size;
1255 		msg->msg_flags |= MSG_TRUNC;
1256 	}
1257 
1258 	skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1259 
1260 	if (srose != NULL) {
1261 		srose->srose_family = AF_ROSE;
1262 		srose->srose_addr   = rose->dest_addr;
1263 		srose->srose_call   = rose->dest_call;
1264 		srose->srose_ndigis = rose->dest_ndigis;
1265 		if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1266 			struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1267 			for (n = 0 ; n < rose->dest_ndigis ; n++)
1268 				full_srose->srose_digis[n] = rose->dest_digis[n];
1269 			msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1270 		} else {
1271 			if (rose->dest_ndigis >= 1) {
1272 				srose->srose_ndigis = 1;
1273 				srose->srose_digi = rose->dest_digis[0];
1274 			}
1275 			msg->msg_namelen = sizeof(struct sockaddr_rose);
1276 		}
1277 	}
1278 
1279 	skb_free_datagram(sk, skb);
1280 
1281 	return copied;
1282 }
1283 
1284 
1285 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1286 {
1287 	struct sock *sk = sock->sk;
1288 	struct rose_sock *rose = rose_sk(sk);
1289 	void __user *argp = (void __user *)arg;
1290 
1291 	switch (cmd) {
1292 	case TIOCOUTQ: {
1293 		long amount;
1294 
1295 		amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1296 		if (amount < 0)
1297 			amount = 0;
1298 		return put_user(amount, (unsigned int __user *) argp);
1299 	}
1300 
1301 	case TIOCINQ: {
1302 		struct sk_buff *skb;
1303 		long amount = 0L;
1304 		/* These two are safe on a single CPU system as only user tasks fiddle here */
1305 		if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1306 			amount = skb->len;
1307 		return put_user(amount, (unsigned int __user *) argp);
1308 	}
1309 
1310 	case SIOCGSTAMP:
1311 		return sock_get_timestamp(sk, (struct timeval __user *) argp);
1312 
1313 	case SIOCGSTAMPNS:
1314 		return sock_get_timestampns(sk, (struct timespec __user *) argp);
1315 
1316 	case SIOCGIFADDR:
1317 	case SIOCSIFADDR:
1318 	case SIOCGIFDSTADDR:
1319 	case SIOCSIFDSTADDR:
1320 	case SIOCGIFBRDADDR:
1321 	case SIOCSIFBRDADDR:
1322 	case SIOCGIFNETMASK:
1323 	case SIOCSIFNETMASK:
1324 	case SIOCGIFMETRIC:
1325 	case SIOCSIFMETRIC:
1326 		return -EINVAL;
1327 
1328 	case SIOCADDRT:
1329 	case SIOCDELRT:
1330 	case SIOCRSCLRRT:
1331 		if (!capable(CAP_NET_ADMIN))
1332 			return -EPERM;
1333 		return rose_rt_ioctl(cmd, argp);
1334 
1335 	case SIOCRSGCAUSE: {
1336 		struct rose_cause_struct rose_cause;
1337 		rose_cause.cause      = rose->cause;
1338 		rose_cause.diagnostic = rose->diagnostic;
1339 		return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1340 	}
1341 
1342 	case SIOCRSSCAUSE: {
1343 		struct rose_cause_struct rose_cause;
1344 		if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1345 			return -EFAULT;
1346 		rose->cause      = rose_cause.cause;
1347 		rose->diagnostic = rose_cause.diagnostic;
1348 		return 0;
1349 	}
1350 
1351 	case SIOCRSSL2CALL:
1352 		if (!capable(CAP_NET_ADMIN)) return -EPERM;
1353 		if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1354 			ax25_listen_release(&rose_callsign, NULL);
1355 		if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1356 			return -EFAULT;
1357 		if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1358 			return ax25_listen_register(&rose_callsign, NULL);
1359 
1360 		return 0;
1361 
1362 	case SIOCRSGL2CALL:
1363 		return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1364 
1365 	case SIOCRSACCEPT:
1366 		if (rose->state == ROSE_STATE_5) {
1367 			rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1368 			rose_start_idletimer(sk);
1369 			rose->condition = 0x00;
1370 			rose->vs        = 0;
1371 			rose->va        = 0;
1372 			rose->vr        = 0;
1373 			rose->vl        = 0;
1374 			rose->state     = ROSE_STATE_3;
1375 		}
1376 		return 0;
1377 
1378 	default:
1379 		return -ENOIOCTLCMD;
1380 	}
1381 
1382 	return 0;
1383 }
1384 
1385 #ifdef CONFIG_PROC_FS
1386 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1387 	__acquires(rose_list_lock)
1388 {
1389 	spin_lock_bh(&rose_list_lock);
1390 	return seq_hlist_start_head(&rose_list, *pos);
1391 }
1392 
1393 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1394 {
1395 	return seq_hlist_next(v, &rose_list, pos);
1396 }
1397 
1398 static void rose_info_stop(struct seq_file *seq, void *v)
1399 	__releases(rose_list_lock)
1400 {
1401 	spin_unlock_bh(&rose_list_lock);
1402 }
1403 
1404 static int rose_info_show(struct seq_file *seq, void *v)
1405 {
1406 	char buf[11], rsbuf[11];
1407 
1408 	if (v == SEQ_START_TOKEN)
1409 		seq_puts(seq,
1410 			 "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");
1411 
1412 	else {
1413 		struct sock *s = sk_entry(v);
1414 		struct rose_sock *rose = rose_sk(s);
1415 		const char *devname, *callsign;
1416 		const struct net_device *dev = rose->device;
1417 
1418 		if (!dev)
1419 			devname = "???";
1420 		else
1421 			devname = dev->name;
1422 
1423 		seq_printf(seq, "%-10s %-9s ",
1424 			   rose2asc(rsbuf, &rose->dest_addr),
1425 			   ax2asc(buf, &rose->dest_call));
1426 
1427 		if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1428 			callsign = "??????-?";
1429 		else
1430 			callsign = ax2asc(buf, &rose->source_call);
1431 
1432 		seq_printf(seq,
1433 			   "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1434 			rose2asc(rsbuf, &rose->source_addr),
1435 			callsign,
1436 			devname,
1437 			rose->lci & 0x0FFF,
1438 			(rose->neighbour) ? rose->neighbour->number : 0,
1439 			rose->state,
1440 			rose->vs,
1441 			rose->vr,
1442 			rose->va,
1443 			ax25_display_timer(&rose->timer) / HZ,
1444 			rose->t1 / HZ,
1445 			rose->t2 / HZ,
1446 			rose->t3 / HZ,
1447 			rose->hb / HZ,
1448 			ax25_display_timer(&rose->idletimer) / (60 * HZ),
1449 			rose->idle / (60 * HZ),
1450 			sk_wmem_alloc_get(s),
1451 			sk_rmem_alloc_get(s),
1452 			s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1453 	}
1454 
1455 	return 0;
1456 }
1457 
1458 static const struct seq_operations rose_info_seqops = {
1459 	.start = rose_info_start,
1460 	.next = rose_info_next,
1461 	.stop = rose_info_stop,
1462 	.show = rose_info_show,
1463 };
1464 
1465 static int rose_info_open(struct inode *inode, struct file *file)
1466 {
1467 	return seq_open(file, &rose_info_seqops);
1468 }
1469 
1470 static const struct file_operations rose_info_fops = {
1471 	.owner = THIS_MODULE,
1472 	.open = rose_info_open,
1473 	.read = seq_read,
1474 	.llseek = seq_lseek,
1475 	.release = seq_release,
1476 };
1477 #endif	/* CONFIG_PROC_FS */
1478 
1479 static const struct net_proto_family rose_family_ops = {
1480 	.family		=	PF_ROSE,
1481 	.create		=	rose_create,
1482 	.owner		=	THIS_MODULE,
1483 };
1484 
1485 static const struct proto_ops rose_proto_ops = {
1486 	.family		=	PF_ROSE,
1487 	.owner		=	THIS_MODULE,
1488 	.release	=	rose_release,
1489 	.bind		=	rose_bind,
1490 	.connect	=	rose_connect,
1491 	.socketpair	=	sock_no_socketpair,
1492 	.accept		=	rose_accept,
1493 	.getname	=	rose_getname,
1494 	.poll		=	datagram_poll,
1495 	.ioctl		=	rose_ioctl,
1496 	.listen		=	rose_listen,
1497 	.shutdown	=	sock_no_shutdown,
1498 	.setsockopt	=	rose_setsockopt,
1499 	.getsockopt	=	rose_getsockopt,
1500 	.sendmsg	=	rose_sendmsg,
1501 	.recvmsg	=	rose_recvmsg,
1502 	.mmap		=	sock_no_mmap,
1503 	.sendpage	=	sock_no_sendpage,
1504 };
1505 
1506 static struct notifier_block rose_dev_notifier = {
1507 	.notifier_call	=	rose_device_event,
1508 };
1509 
1510 static struct net_device **dev_rose;
1511 
1512 static struct ax25_protocol rose_pid = {
1513 	.pid	= AX25_P_ROSE,
1514 	.func	= rose_route_frame
1515 };
1516 
1517 static struct ax25_linkfail rose_linkfail_notifier = {
1518 	.func	= rose_link_failed
1519 };
1520 
1521 static int __init rose_proto_init(void)
1522 {
1523 	int i;
1524 	int rc;
1525 
1526 	if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1527 		printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1528 		rc = -EINVAL;
1529 		goto out;
1530 	}
1531 
1532 	rc = proto_register(&rose_proto, 0);
1533 	if (rc != 0)
1534 		goto out;
1535 
1536 	rose_callsign = null_ax25_address;
1537 
1538 	dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1539 	if (dev_rose == NULL) {
1540 		printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1541 		rc = -ENOMEM;
1542 		goto out_proto_unregister;
1543 	}
1544 
1545 	for (i = 0; i < rose_ndevs; i++) {
1546 		struct net_device *dev;
1547 		char name[IFNAMSIZ];
1548 
1549 		sprintf(name, "rose%d", i);
1550 		dev = alloc_netdev(0, name, rose_setup);
1551 		if (!dev) {
1552 			printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1553 			rc = -ENOMEM;
1554 			goto fail;
1555 		}
1556 		rc = register_netdev(dev);
1557 		if (rc) {
1558 			printk(KERN_ERR "ROSE: netdevice registration failed\n");
1559 			free_netdev(dev);
1560 			goto fail;
1561 		}
1562 		rose_set_lockdep_key(dev);
1563 		dev_rose[i] = dev;
1564 	}
1565 
1566 	sock_register(&rose_family_ops);
1567 	register_netdevice_notifier(&rose_dev_notifier);
1568 
1569 	ax25_register_pid(&rose_pid);
1570 	ax25_linkfail_register(&rose_linkfail_notifier);
1571 
1572 #ifdef CONFIG_SYSCTL
1573 	rose_register_sysctl();
1574 #endif
1575 	rose_loopback_init();
1576 
1577 	rose_add_loopback_neigh();
1578 
1579 	proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1580 	proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1581 	proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1582 	proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1583 out:
1584 	return rc;
1585 fail:
1586 	while (--i >= 0) {
1587 		unregister_netdev(dev_rose[i]);
1588 		free_netdev(dev_rose[i]);
1589 	}
1590 	kfree(dev_rose);
1591 out_proto_unregister:
1592 	proto_unregister(&rose_proto);
1593 	goto out;
1594 }
1595 module_init(rose_proto_init);
1596 
1597 module_param(rose_ndevs, int, 0);
1598 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1599 
1600 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1601 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1602 MODULE_LICENSE("GPL");
1603 MODULE_ALIAS_NETPROTO(PF_ROSE);
1604 
1605 static void __exit rose_exit(void)
1606 {
1607 	int i;
1608 
1609 	proc_net_remove(&init_net, "rose");
1610 	proc_net_remove(&init_net, "rose_neigh");
1611 	proc_net_remove(&init_net, "rose_nodes");
1612 	proc_net_remove(&init_net, "rose_routes");
1613 	rose_loopback_clear();
1614 
1615 	rose_rt_free();
1616 
1617 	ax25_protocol_release(AX25_P_ROSE);
1618 	ax25_linkfail_release(&rose_linkfail_notifier);
1619 
1620 	if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1621 		ax25_listen_release(&rose_callsign, NULL);
1622 
1623 #ifdef CONFIG_SYSCTL
1624 	rose_unregister_sysctl();
1625 #endif
1626 	unregister_netdevice_notifier(&rose_dev_notifier);
1627 
1628 	sock_unregister(PF_ROSE);
1629 
1630 	for (i = 0; i < rose_ndevs; i++) {
1631 		struct net_device *dev = dev_rose[i];
1632 
1633 		if (dev) {
1634 			unregister_netdev(dev);
1635 			free_netdev(dev);
1636 		}
1637 	}
1638 
1639 	kfree(dev_rose);
1640 	proto_unregister(&rose_proto);
1641 }
1642 
1643 module_exit(rose_exit);
1644