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/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
50static int rose_ndevs = 10;
51
52int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
53int sysctl_rose_call_request_timeout    = ROSE_DEFAULT_T1;
54int sysctl_rose_reset_request_timeout   = ROSE_DEFAULT_T2;
55int sysctl_rose_clear_request_timeout   = ROSE_DEFAULT_T3;
56int sysctl_rose_no_activity_timeout     = ROSE_DEFAULT_IDLE;
57int sysctl_rose_ack_hold_back_timeout   = ROSE_DEFAULT_HB;
58int sysctl_rose_routing_control         = ROSE_DEFAULT_ROUTING;
59int sysctl_rose_link_fail_timeout       = ROSE_DEFAULT_FAIL_TIMEOUT;
60int sysctl_rose_maximum_vcs             = ROSE_DEFAULT_MAXVC;
61int sysctl_rose_window_size             = ROSE_DEFAULT_WINDOW_SIZE;
62
63static HLIST_HEAD(rose_list);
64static DEFINE_SPINLOCK(rose_list_lock);
65
66static const struct proto_ops rose_proto_ops;
67
68ax25_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 */
76static struct lock_class_key rose_netdev_xmit_lock_key;
77static struct lock_class_key rose_netdev_addr_lock_key;
78
79static void rose_set_lockdep_one(struct net_device *dev,
80				 struct netdev_queue *txq,
81				 void *_unused)
82{
83	lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
84}
85
86static void rose_set_lockdep_key(struct net_device *dev)
87{
88	lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
89	netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
90}
91
92/*
93 *	Convert a ROSE address into text.
94 */
95char *rose2asc(char *buf, const rose_address *addr)
96{
97	if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
98	    addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
99	    addr->rose_addr[4] == 0x00) {
100		strcpy(buf, "*");
101	} else {
102		sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
103						addr->rose_addr[1] & 0xFF,
104						addr->rose_addr[2] & 0xFF,
105						addr->rose_addr[3] & 0xFF,
106						addr->rose_addr[4] & 0xFF);
107	}
108
109	return buf;
110}
111
112/*
113 *	Compare two ROSE addresses, 0 == equal.
114 */
115int rosecmp(rose_address *addr1, rose_address *addr2)
116{
117	int i;
118
119	for (i = 0; i < 5; i++)
120		if (addr1->rose_addr[i] != addr2->rose_addr[i])
121			return 1;
122
123	return 0;
124}
125
126/*
127 *	Compare two ROSE addresses for only mask digits, 0 == equal.
128 */
129int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
130{
131	unsigned int i, j;
132
133	if (mask > 10)
134		return 1;
135
136	for (i = 0; i < mask; i++) {
137		j = i / 2;
138
139		if ((i % 2) != 0) {
140			if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
141				return 1;
142		} else {
143			if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
144				return 1;
145		}
146	}
147
148	return 0;
149}
150
151/*
152 *	Socket removal during an interrupt is now safe.
153 */
154static void rose_remove_socket(struct sock *sk)
155{
156	spin_lock_bh(&rose_list_lock);
157	sk_del_node_init(sk);
158	spin_unlock_bh(&rose_list_lock);
159}
160
161/*
162 *	Kill all bound sockets on a broken link layer connection to a
163 *	particular neighbour.
164 */
165void rose_kill_by_neigh(struct rose_neigh *neigh)
166{
167	struct sock *s;
168
169	spin_lock_bh(&rose_list_lock);
170	sk_for_each(s, &rose_list) {
171		struct rose_sock *rose = rose_sk(s);
172
173		if (rose->neighbour == neigh) {
174			rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
175			rose->neighbour->use--;
176			rose->neighbour = NULL;
177		}
178	}
179	spin_unlock_bh(&rose_list_lock);
180}
181
182/*
183 *	Kill all bound sockets on a dropped device.
184 */
185static void rose_kill_by_device(struct net_device *dev)
186{
187	struct sock *s;
188
189	spin_lock_bh(&rose_list_lock);
190	sk_for_each(s, &rose_list) {
191		struct rose_sock *rose = rose_sk(s);
192
193		if (rose->device == dev) {
194			rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
195			rose->neighbour->use--;
196			rose->device = NULL;
197		}
198	}
199	spin_unlock_bh(&rose_list_lock);
200}
201
202/*
203 *	Handle device status changes.
204 */
205static int rose_device_event(struct notifier_block *this,
206			     unsigned long event, void *ptr)
207{
208	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
209
210	if (!net_eq(dev_net(dev), &init_net))
211		return NOTIFY_DONE;
212
213	if (event != NETDEV_DOWN)
214		return NOTIFY_DONE;
215
216	switch (dev->type) {
217	case ARPHRD_ROSE:
218		rose_kill_by_device(dev);
219		break;
220	case ARPHRD_AX25:
221		rose_link_device_down(dev);
222		rose_rt_device_down(dev);
223		break;
224	}
225
226	return NOTIFY_DONE;
227}
228
229/*
230 *	Add a socket to the bound sockets list.
231 */
232static void rose_insert_socket(struct sock *sk)
233{
234
235	spin_lock_bh(&rose_list_lock);
236	sk_add_node(sk, &rose_list);
237	spin_unlock_bh(&rose_list_lock);
238}
239
240/*
241 *	Find a socket that wants to accept the Call Request we just
242 *	received.
243 */
244static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
245{
246	struct sock *s;
247
248	spin_lock_bh(&rose_list_lock);
249	sk_for_each(s, &rose_list) {
250		struct rose_sock *rose = rose_sk(s);
251
252		if (!rosecmp(&rose->source_addr, addr) &&
253		    !ax25cmp(&rose->source_call, call) &&
254		    !rose->source_ndigis && s->sk_state == TCP_LISTEN)
255			goto found;
256	}
257
258	sk_for_each(s, &rose_list) {
259		struct rose_sock *rose = rose_sk(s);
260
261		if (!rosecmp(&rose->source_addr, addr) &&
262		    !ax25cmp(&rose->source_call, &null_ax25_address) &&
263		    s->sk_state == TCP_LISTEN)
264			goto found;
265	}
266	s = NULL;
267found:
268	spin_unlock_bh(&rose_list_lock);
269	return s;
270}
271
272/*
273 *	Find a connected ROSE socket given my LCI and device.
274 */
275struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
276{
277	struct sock *s;
278
279	spin_lock_bh(&rose_list_lock);
280	sk_for_each(s, &rose_list) {
281		struct rose_sock *rose = rose_sk(s);
282
283		if (rose->lci == lci && rose->neighbour == neigh)
284			goto found;
285	}
286	s = NULL;
287found:
288	spin_unlock_bh(&rose_list_lock);
289	return s;
290}
291
292/*
293 *	Find a unique LCI for a given device.
294 */
295unsigned int rose_new_lci(struct rose_neigh *neigh)
296{
297	int lci;
298
299	if (neigh->dce_mode) {
300		for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
301			if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
302				return lci;
303	} else {
304		for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
305			if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
306				return lci;
307	}
308
309	return 0;
310}
311
312/*
313 *	Deferred destroy.
314 */
315void rose_destroy_socket(struct sock *);
316
317/*
318 *	Handler for deferred kills.
319 */
320static void rose_destroy_timer(unsigned long data)
321{
322	rose_destroy_socket((struct sock *)data);
323}
324
325/*
326 *	This is called from user mode and the timers. Thus it protects itself
327 *	against interrupt users but doesn't worry about being called during
328 *	work.  Once it is removed from the queue no interrupt or bottom half
329 *	will touch it and we are (fairly 8-) ) safe.
330 */
331void rose_destroy_socket(struct sock *sk)
332{
333	struct sk_buff *skb;
334
335	rose_remove_socket(sk);
336	rose_stop_heartbeat(sk);
337	rose_stop_idletimer(sk);
338	rose_stop_timer(sk);
339
340	rose_clear_queues(sk);		/* Flush the queues */
341
342	while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
343		if (skb->sk != sk) {	/* A pending connection */
344			/* Queue the unaccepted socket for death */
345			sock_set_flag(skb->sk, SOCK_DEAD);
346			rose_start_heartbeat(skb->sk);
347			rose_sk(skb->sk)->state = ROSE_STATE_0;
348		}
349
350		kfree_skb(skb);
351	}
352
353	if (sk_has_allocations(sk)) {
354		/* Defer: outstanding buffers */
355		setup_timer(&sk->sk_timer, rose_destroy_timer,
356				(unsigned long)sk);
357		sk->sk_timer.expires  = jiffies + 10 * HZ;
358		add_timer(&sk->sk_timer);
359	} else
360		sock_put(sk);
361}
362
363/*
364 *	Handling for system calls applied via the various interfaces to a
365 *	ROSE socket object.
366 */
367
368static int rose_setsockopt(struct socket *sock, int level, int optname,
369	char __user *optval, unsigned int optlen)
370{
371	struct sock *sk = sock->sk;
372	struct rose_sock *rose = rose_sk(sk);
373	int opt;
374
375	if (level != SOL_ROSE)
376		return -ENOPROTOOPT;
377
378	if (optlen < sizeof(int))
379		return -EINVAL;
380
381	if (get_user(opt, (int __user *)optval))
382		return -EFAULT;
383
384	switch (optname) {
385	case ROSE_DEFER:
386		rose->defer = opt ? 1 : 0;
387		return 0;
388
389	case ROSE_T1:
390		if (opt < 1)
391			return -EINVAL;
392		rose->t1 = opt * HZ;
393		return 0;
394
395	case ROSE_T2:
396		if (opt < 1)
397			return -EINVAL;
398		rose->t2 = opt * HZ;
399		return 0;
400
401	case ROSE_T3:
402		if (opt < 1)
403			return -EINVAL;
404		rose->t3 = opt * HZ;
405		return 0;
406
407	case ROSE_HOLDBACK:
408		if (opt < 1)
409			return -EINVAL;
410		rose->hb = opt * HZ;
411		return 0;
412
413	case ROSE_IDLE:
414		if (opt < 0)
415			return -EINVAL;
416		rose->idle = opt * 60 * HZ;
417		return 0;
418
419	case ROSE_QBITINCL:
420		rose->qbitincl = opt ? 1 : 0;
421		return 0;
422
423	default:
424		return -ENOPROTOOPT;
425	}
426}
427
428static int rose_getsockopt(struct socket *sock, int level, int optname,
429	char __user *optval, int __user *optlen)
430{
431	struct sock *sk = sock->sk;
432	struct rose_sock *rose = rose_sk(sk);
433	int val = 0;
434	int len;
435
436	if (level != SOL_ROSE)
437		return -ENOPROTOOPT;
438
439	if (get_user(len, optlen))
440		return -EFAULT;
441
442	if (len < 0)
443		return -EINVAL;
444
445	switch (optname) {
446	case ROSE_DEFER:
447		val = rose->defer;
448		break;
449
450	case ROSE_T1:
451		val = rose->t1 / HZ;
452		break;
453
454	case ROSE_T2:
455		val = rose->t2 / HZ;
456		break;
457
458	case ROSE_T3:
459		val = rose->t3 / HZ;
460		break;
461
462	case ROSE_HOLDBACK:
463		val = rose->hb / HZ;
464		break;
465
466	case ROSE_IDLE:
467		val = rose->idle / (60 * HZ);
468		break;
469
470	case ROSE_QBITINCL:
471		val = rose->qbitincl;
472		break;
473
474	default:
475		return -ENOPROTOOPT;
476	}
477
478	len = min_t(unsigned int, len, sizeof(int));
479
480	if (put_user(len, optlen))
481		return -EFAULT;
482
483	return copy_to_user(optval, &val, len) ? -EFAULT : 0;
484}
485
486static int rose_listen(struct socket *sock, int backlog)
487{
488	struct sock *sk = sock->sk;
489
490	if (sk->sk_state != TCP_LISTEN) {
491		struct rose_sock *rose = rose_sk(sk);
492
493		rose->dest_ndigis = 0;
494		memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
495		memset(&rose->dest_call, 0, AX25_ADDR_LEN);
496		memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
497		sk->sk_max_ack_backlog = backlog;
498		sk->sk_state           = TCP_LISTEN;
499		return 0;
500	}
501
502	return -EOPNOTSUPP;
503}
504
505static struct proto rose_proto = {
506	.name	  = "ROSE",
507	.owner	  = THIS_MODULE,
508	.obj_size = sizeof(struct rose_sock),
509};
510
511static int rose_create(struct net *net, struct socket *sock, int protocol,
512		       int kern)
513{
514	struct sock *sk;
515	struct rose_sock *rose;
516
517	if (!net_eq(net, &init_net))
518		return -EAFNOSUPPORT;
519
520	if (sock->type != SOCK_SEQPACKET || protocol != 0)
521		return -ESOCKTNOSUPPORT;
522
523	sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
524	if (sk == NULL)
525		return -ENOMEM;
526
527	rose = rose_sk(sk);
528
529	sock_init_data(sock, sk);
530
531	skb_queue_head_init(&rose->ack_queue);
532#ifdef M_BIT
533	skb_queue_head_init(&rose->frag_queue);
534	rose->fraglen    = 0;
535#endif
536
537	sock->ops    = &rose_proto_ops;
538	sk->sk_protocol = protocol;
539
540	init_timer(&rose->timer);
541	init_timer(&rose->idletimer);
542
543	rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
544	rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
545	rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
546	rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
547	rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
548
549	rose->state = ROSE_STATE_0;
550
551	return 0;
552}
553
554static struct sock *rose_make_new(struct sock *osk)
555{
556	struct sock *sk;
557	struct rose_sock *rose, *orose;
558
559	if (osk->sk_type != SOCK_SEQPACKET)
560		return NULL;
561
562	sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto);
563	if (sk == NULL)
564		return NULL;
565
566	rose = rose_sk(sk);
567
568	sock_init_data(NULL, sk);
569
570	skb_queue_head_init(&rose->ack_queue);
571#ifdef M_BIT
572	skb_queue_head_init(&rose->frag_queue);
573	rose->fraglen  = 0;
574#endif
575
576	sk->sk_type     = osk->sk_type;
577	sk->sk_priority = osk->sk_priority;
578	sk->sk_protocol = osk->sk_protocol;
579	sk->sk_rcvbuf   = osk->sk_rcvbuf;
580	sk->sk_sndbuf   = osk->sk_sndbuf;
581	sk->sk_state    = TCP_ESTABLISHED;
582	sock_copy_flags(sk, osk);
583
584	init_timer(&rose->timer);
585	init_timer(&rose->idletimer);
586
587	orose		= rose_sk(osk);
588	rose->t1	= orose->t1;
589	rose->t2	= orose->t2;
590	rose->t3	= orose->t3;
591	rose->hb	= orose->hb;
592	rose->idle	= orose->idle;
593	rose->defer	= orose->defer;
594	rose->device	= orose->device;
595	rose->qbitincl	= orose->qbitincl;
596
597	return sk;
598}
599
600static int rose_release(struct socket *sock)
601{
602	struct sock *sk = sock->sk;
603	struct rose_sock *rose;
604
605	if (sk == NULL) return 0;
606
607	sock_hold(sk);
608	sock_orphan(sk);
609	lock_sock(sk);
610	rose = rose_sk(sk);
611
612	switch (rose->state) {
613	case ROSE_STATE_0:
614		release_sock(sk);
615		rose_disconnect(sk, 0, -1, -1);
616		lock_sock(sk);
617		rose_destroy_socket(sk);
618		break;
619
620	case ROSE_STATE_2:
621		rose->neighbour->use--;
622		release_sock(sk);
623		rose_disconnect(sk, 0, -1, -1);
624		lock_sock(sk);
625		rose_destroy_socket(sk);
626		break;
627
628	case ROSE_STATE_1:
629	case ROSE_STATE_3:
630	case ROSE_STATE_4:
631	case ROSE_STATE_5:
632		rose_clear_queues(sk);
633		rose_stop_idletimer(sk);
634		rose_write_internal(sk, ROSE_CLEAR_REQUEST);
635		rose_start_t3timer(sk);
636		rose->state  = ROSE_STATE_2;
637		sk->sk_state    = TCP_CLOSE;
638		sk->sk_shutdown |= SEND_SHUTDOWN;
639		sk->sk_state_change(sk);
640		sock_set_flag(sk, SOCK_DEAD);
641		sock_set_flag(sk, SOCK_DESTROY);
642		break;
643
644	default:
645		break;
646	}
647
648	sock->sk = NULL;
649	release_sock(sk);
650	sock_put(sk);
651
652	return 0;
653}
654
655static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
656{
657	struct sock *sk = sock->sk;
658	struct rose_sock *rose = rose_sk(sk);
659	struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
660	struct net_device *dev;
661	ax25_address *source;
662	ax25_uid_assoc *user;
663	int n;
664
665	if (!sock_flag(sk, SOCK_ZAPPED))
666		return -EINVAL;
667
668	if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
669		return -EINVAL;
670
671	if (addr->srose_family != AF_ROSE)
672		return -EINVAL;
673
674	if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
675		return -EINVAL;
676
677	if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
678		return -EINVAL;
679
680	if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
681		return -EADDRNOTAVAIL;
682
683	source = &addr->srose_call;
684
685	user = ax25_findbyuid(current_euid());
686	if (user) {
687		rose->source_call = user->call;
688		ax25_uid_put(user);
689	} else {
690		if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
691			return -EACCES;
692		rose->source_call   = *source;
693	}
694
695	rose->source_addr   = addr->srose_addr;
696	rose->device        = dev;
697	rose->source_ndigis = addr->srose_ndigis;
698
699	if (addr_len == sizeof(struct full_sockaddr_rose)) {
700		struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
701		for (n = 0 ; n < addr->srose_ndigis ; n++)
702			rose->source_digis[n] = full_addr->srose_digis[n];
703	} else {
704		if (rose->source_ndigis == 1) {
705			rose->source_digis[0] = addr->srose_digi;
706		}
707	}
708
709	rose_insert_socket(sk);
710
711	sock_reset_flag(sk, SOCK_ZAPPED);
712
713	return 0;
714}
715
716static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
717{
718	struct sock *sk = sock->sk;
719	struct rose_sock *rose = rose_sk(sk);
720	struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
721	unsigned char cause, diagnostic;
722	struct net_device *dev;
723	ax25_uid_assoc *user;
724	int n, err = 0;
725
726	if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
727		return -EINVAL;
728
729	if (addr->srose_family != AF_ROSE)
730		return -EINVAL;
731
732	if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
733		return -EINVAL;
734
735	if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
736		return -EINVAL;
737
738	/* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
739	if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
740		return -EINVAL;
741
742	lock_sock(sk);
743
744	if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
745		/* Connect completed during a ERESTARTSYS event */
746		sock->state = SS_CONNECTED;
747		goto out_release;
748	}
749
750	if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
751		sock->state = SS_UNCONNECTED;
752		err = -ECONNREFUSED;
753		goto out_release;
754	}
755
756	if (sk->sk_state == TCP_ESTABLISHED) {
757		/* No reconnect on a seqpacket socket */
758		err = -EISCONN;
759		goto out_release;
760	}
761
762	sk->sk_state   = TCP_CLOSE;
763	sock->state = SS_UNCONNECTED;
764
765	rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
766					 &diagnostic, 0);
767	if (!rose->neighbour) {
768		err = -ENETUNREACH;
769		goto out_release;
770	}
771
772	rose->lci = rose_new_lci(rose->neighbour);
773	if (!rose->lci) {
774		err = -ENETUNREACH;
775		goto out_release;
776	}
777
778	if (sock_flag(sk, SOCK_ZAPPED)) {	/* Must bind first - autobinding in this may or may not work */
779		sock_reset_flag(sk, SOCK_ZAPPED);
780
781		if ((dev = rose_dev_first()) == NULL) {
782			err = -ENETUNREACH;
783			goto out_release;
784		}
785
786		user = ax25_findbyuid(current_euid());
787		if (!user) {
788			err = -EINVAL;
789			goto out_release;
790		}
791
792		memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
793		rose->source_call = user->call;
794		rose->device      = dev;
795		ax25_uid_put(user);
796
797		rose_insert_socket(sk);		/* Finish the bind */
798	}
799	rose->dest_addr   = addr->srose_addr;
800	rose->dest_call   = addr->srose_call;
801	rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
802	rose->dest_ndigis = addr->srose_ndigis;
803
804	if (addr_len == sizeof(struct full_sockaddr_rose)) {
805		struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
806		for (n = 0 ; n < addr->srose_ndigis ; n++)
807			rose->dest_digis[n] = full_addr->srose_digis[n];
808	} else {
809		if (rose->dest_ndigis == 1) {
810			rose->dest_digis[0] = addr->srose_digi;
811		}
812	}
813
814	/* Move to connecting socket, start sending Connect Requests */
815	sock->state   = SS_CONNECTING;
816	sk->sk_state     = TCP_SYN_SENT;
817
818	rose->state = ROSE_STATE_1;
819
820	rose->neighbour->use++;
821
822	rose_write_internal(sk, ROSE_CALL_REQUEST);
823	rose_start_heartbeat(sk);
824	rose_start_t1timer(sk);
825
826	/* Now the loop */
827	if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
828		err = -EINPROGRESS;
829		goto out_release;
830	}
831
832	/*
833	 * A Connect Ack with Choke or timeout or failed routing will go to
834	 * closed.
835	 */
836	if (sk->sk_state == TCP_SYN_SENT) {
837		DEFINE_WAIT(wait);
838
839		for (;;) {
840			prepare_to_wait(sk_sleep(sk), &wait,
841					TASK_INTERRUPTIBLE);
842			if (sk->sk_state != TCP_SYN_SENT)
843				break;
844			if (!signal_pending(current)) {
845				release_sock(sk);
846				schedule();
847				lock_sock(sk);
848				continue;
849			}
850			err = -ERESTARTSYS;
851			break;
852		}
853		finish_wait(sk_sleep(sk), &wait);
854
855		if (err)
856			goto out_release;
857	}
858
859	if (sk->sk_state != TCP_ESTABLISHED) {
860		sock->state = SS_UNCONNECTED;
861		err = sock_error(sk);	/* Always set at this point */
862		goto out_release;
863	}
864
865	sock->state = SS_CONNECTED;
866
867out_release:
868	release_sock(sk);
869
870	return err;
871}
872
873static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
874{
875	struct sk_buff *skb;
876	struct sock *newsk;
877	DEFINE_WAIT(wait);
878	struct sock *sk;
879	int err = 0;
880
881	if ((sk = sock->sk) == NULL)
882		return -EINVAL;
883
884	lock_sock(sk);
885	if (sk->sk_type != SOCK_SEQPACKET) {
886		err = -EOPNOTSUPP;
887		goto out_release;
888	}
889
890	if (sk->sk_state != TCP_LISTEN) {
891		err = -EINVAL;
892		goto out_release;
893	}
894
895	/*
896	 *	The write queue this time is holding sockets ready to use
897	 *	hooked into the SABM we saved
898	 */
899	for (;;) {
900		prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
901
902		skb = skb_dequeue(&sk->sk_receive_queue);
903		if (skb)
904			break;
905
906		if (flags & O_NONBLOCK) {
907			err = -EWOULDBLOCK;
908			break;
909		}
910		if (!signal_pending(current)) {
911			release_sock(sk);
912			schedule();
913			lock_sock(sk);
914			continue;
915		}
916		err = -ERESTARTSYS;
917		break;
918	}
919	finish_wait(sk_sleep(sk), &wait);
920	if (err)
921		goto out_release;
922
923	newsk = skb->sk;
924	sock_graft(newsk, newsock);
925
926	/* Now attach up the new socket */
927	skb->sk = NULL;
928	kfree_skb(skb);
929	sk->sk_ack_backlog--;
930
931out_release:
932	release_sock(sk);
933
934	return err;
935}
936
937static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
938	int *uaddr_len, int peer)
939{
940	struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
941	struct sock *sk = sock->sk;
942	struct rose_sock *rose = rose_sk(sk);
943	int n;
944
945	memset(srose, 0, sizeof(*srose));
946	if (peer != 0) {
947		if (sk->sk_state != TCP_ESTABLISHED)
948			return -ENOTCONN;
949		srose->srose_family = AF_ROSE;
950		srose->srose_addr   = rose->dest_addr;
951		srose->srose_call   = rose->dest_call;
952		srose->srose_ndigis = rose->dest_ndigis;
953		for (n = 0; n < rose->dest_ndigis; n++)
954			srose->srose_digis[n] = rose->dest_digis[n];
955	} else {
956		srose->srose_family = AF_ROSE;
957		srose->srose_addr   = rose->source_addr;
958		srose->srose_call   = rose->source_call;
959		srose->srose_ndigis = rose->source_ndigis;
960		for (n = 0; n < rose->source_ndigis; n++)
961			srose->srose_digis[n] = rose->source_digis[n];
962	}
963
964	*uaddr_len = sizeof(struct full_sockaddr_rose);
965	return 0;
966}
967
968int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
969{
970	struct sock *sk;
971	struct sock *make;
972	struct rose_sock *make_rose;
973	struct rose_facilities_struct facilities;
974	int n;
975
976	skb->sk = NULL;		/* Initially we don't know who it's for */
977
978	/*
979	 *	skb->data points to the rose frame start
980	 */
981	memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
982
983	if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
984				   skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
985				   &facilities)) {
986		rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
987		return 0;
988	}
989
990	sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
991
992	/*
993	 * We can't accept the Call Request.
994	 */
995	if (sk == NULL || sk_acceptq_is_full(sk) ||
996	    (make = rose_make_new(sk)) == NULL) {
997		rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
998		return 0;
999	}
1000
1001	skb->sk     = make;
1002	make->sk_state = TCP_ESTABLISHED;
1003	make_rose = rose_sk(make);
1004
1005	make_rose->lci           = lci;
1006	make_rose->dest_addr     = facilities.dest_addr;
1007	make_rose->dest_call     = facilities.dest_call;
1008	make_rose->dest_ndigis   = facilities.dest_ndigis;
1009	for (n = 0 ; n < facilities.dest_ndigis ; n++)
1010		make_rose->dest_digis[n] = facilities.dest_digis[n];
1011	make_rose->source_addr   = facilities.source_addr;
1012	make_rose->source_call   = facilities.source_call;
1013	make_rose->source_ndigis = facilities.source_ndigis;
1014	for (n = 0 ; n < facilities.source_ndigis ; n++)
1015		make_rose->source_digis[n] = facilities.source_digis[n];
1016	make_rose->neighbour     = neigh;
1017	make_rose->device        = dev;
1018	make_rose->facilities    = facilities;
1019
1020	make_rose->neighbour->use++;
1021
1022	if (rose_sk(sk)->defer) {
1023		make_rose->state = ROSE_STATE_5;
1024	} else {
1025		rose_write_internal(make, ROSE_CALL_ACCEPTED);
1026		make_rose->state = ROSE_STATE_3;
1027		rose_start_idletimer(make);
1028	}
1029
1030	make_rose->condition = 0x00;
1031	make_rose->vs        = 0;
1032	make_rose->va        = 0;
1033	make_rose->vr        = 0;
1034	make_rose->vl        = 0;
1035	sk->sk_ack_backlog++;
1036
1037	rose_insert_socket(make);
1038
1039	skb_queue_head(&sk->sk_receive_queue, skb);
1040
1041	rose_start_heartbeat(make);
1042
1043	if (!sock_flag(sk, SOCK_DEAD))
1044		sk->sk_data_ready(sk);
1045
1046	return 1;
1047}
1048
1049static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1050{
1051	struct sock *sk = sock->sk;
1052	struct rose_sock *rose = rose_sk(sk);
1053	DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1054	int err;
1055	struct full_sockaddr_rose srose;
1056	struct sk_buff *skb;
1057	unsigned char *asmptr;
1058	int n, size, qbit = 0;
1059
1060	if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1061		return -EINVAL;
1062
1063	if (sock_flag(sk, SOCK_ZAPPED))
1064		return -EADDRNOTAVAIL;
1065
1066	if (sk->sk_shutdown & SEND_SHUTDOWN) {
1067		send_sig(SIGPIPE, current, 0);
1068		return -EPIPE;
1069	}
1070
1071	if (rose->neighbour == NULL || rose->device == NULL)
1072		return -ENETUNREACH;
1073
1074	if (usrose != NULL) {
1075		if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1076			return -EINVAL;
1077		memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1078		memcpy(&srose, usrose, msg->msg_namelen);
1079		if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1080		    ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1081			return -EISCONN;
1082		if (srose.srose_ndigis != rose->dest_ndigis)
1083			return -EISCONN;
1084		if (srose.srose_ndigis == rose->dest_ndigis) {
1085			for (n = 0 ; n < srose.srose_ndigis ; n++)
1086				if (ax25cmp(&rose->dest_digis[n],
1087					    &srose.srose_digis[n]))
1088					return -EISCONN;
1089		}
1090		if (srose.srose_family != AF_ROSE)
1091			return -EINVAL;
1092	} else {
1093		if (sk->sk_state != TCP_ESTABLISHED)
1094			return -ENOTCONN;
1095
1096		srose.srose_family = AF_ROSE;
1097		srose.srose_addr   = rose->dest_addr;
1098		srose.srose_call   = rose->dest_call;
1099		srose.srose_ndigis = rose->dest_ndigis;
1100		for (n = 0 ; n < rose->dest_ndigis ; n++)
1101			srose.srose_digis[n] = rose->dest_digis[n];
1102	}
1103
1104	/* Build a packet */
1105	/* Sanity check the packet size */
1106	if (len > 65535)
1107		return -EMSGSIZE;
1108
1109	size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1110
1111	if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1112		return err;
1113
1114	skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1115
1116	/*
1117	 *	Put the data on the end
1118	 */
1119
1120	skb_reset_transport_header(skb);
1121	skb_put(skb, len);
1122
1123	err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1124	if (err) {
1125		kfree_skb(skb);
1126		return err;
1127	}
1128
1129	/*
1130	 *	If the Q BIT Include socket option is in force, the first
1131	 *	byte of the user data is the logical value of the Q Bit.
1132	 */
1133	if (rose->qbitincl) {
1134		qbit = skb->data[0];
1135		skb_pull(skb, 1);
1136	}
1137
1138	/*
1139	 *	Push down the ROSE header
1140	 */
1141	asmptr = skb_push(skb, ROSE_MIN_LEN);
1142
1143	/* Build a ROSE Network header */
1144	asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1145	asmptr[1] = (rose->lci >> 0) & 0xFF;
1146	asmptr[2] = ROSE_DATA;
1147
1148	if (qbit)
1149		asmptr[0] |= ROSE_Q_BIT;
1150
1151	if (sk->sk_state != TCP_ESTABLISHED) {
1152		kfree_skb(skb);
1153		return -ENOTCONN;
1154	}
1155
1156#ifdef M_BIT
1157#define ROSE_PACLEN (256-ROSE_MIN_LEN)
1158	if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1159		unsigned char header[ROSE_MIN_LEN];
1160		struct sk_buff *skbn;
1161		int frontlen;
1162		int lg;
1163
1164		/* Save a copy of the Header */
1165		skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1166		skb_pull(skb, ROSE_MIN_LEN);
1167
1168		frontlen = skb_headroom(skb);
1169
1170		while (skb->len > 0) {
1171			if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1172				kfree_skb(skb);
1173				return err;
1174			}
1175
1176			skbn->sk   = sk;
1177			skbn->free = 1;
1178			skbn->arp  = 1;
1179
1180			skb_reserve(skbn, frontlen);
1181
1182			lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1183
1184			/* Copy the user data */
1185			skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1186			skb_pull(skb, lg);
1187
1188			/* Duplicate the Header */
1189			skb_push(skbn, ROSE_MIN_LEN);
1190			skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1191
1192			if (skb->len > 0)
1193				skbn->data[2] |= M_BIT;
1194
1195			skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1196		}
1197
1198		skb->free = 1;
1199		kfree_skb(skb);
1200	} else {
1201		skb_queue_tail(&sk->sk_write_queue, skb);		/* Throw it on the queue */
1202	}
1203#else
1204	skb_queue_tail(&sk->sk_write_queue, skb);	/* Shove it onto the queue */
1205#endif
1206
1207	rose_kick(sk);
1208
1209	return len;
1210}
1211
1212
1213static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1214			int flags)
1215{
1216	struct sock *sk = sock->sk;
1217	struct rose_sock *rose = rose_sk(sk);
1218	size_t copied;
1219	unsigned char *asmptr;
1220	struct sk_buff *skb;
1221	int n, er, qbit;
1222
1223	/*
1224	 * This works for seqpacket too. The receiver has ordered the queue for
1225	 * us! We do one quick check first though
1226	 */
1227	if (sk->sk_state != TCP_ESTABLISHED)
1228		return -ENOTCONN;
1229
1230	/* Now we can treat all alike */
1231	if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1232		return er;
1233
1234	qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1235
1236	skb_pull(skb, ROSE_MIN_LEN);
1237
1238	if (rose->qbitincl) {
1239		asmptr  = skb_push(skb, 1);
1240		*asmptr = qbit;
1241	}
1242
1243	skb_reset_transport_header(skb);
1244	copied     = skb->len;
1245
1246	if (copied > size) {
1247		copied = size;
1248		msg->msg_flags |= MSG_TRUNC;
1249	}
1250
1251	skb_copy_datagram_msg(skb, 0, msg, copied);
1252
1253	if (msg->msg_name) {
1254		struct sockaddr_rose *srose;
1255		DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1256				 msg->msg_name);
1257
1258		memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1259		srose = msg->msg_name;
1260		srose->srose_family = AF_ROSE;
1261		srose->srose_addr   = rose->dest_addr;
1262		srose->srose_call   = rose->dest_call;
1263		srose->srose_ndigis = rose->dest_ndigis;
1264		for (n = 0 ; n < rose->dest_ndigis ; n++)
1265			full_srose->srose_digis[n] = rose->dest_digis[n];
1266		msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1267	}
1268
1269	skb_free_datagram(sk, skb);
1270
1271	return copied;
1272}
1273
1274
1275static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1276{
1277	struct sock *sk = sock->sk;
1278	struct rose_sock *rose = rose_sk(sk);
1279	void __user *argp = (void __user *)arg;
1280
1281	switch (cmd) {
1282	case TIOCOUTQ: {
1283		long amount;
1284
1285		amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1286		if (amount < 0)
1287			amount = 0;
1288		return put_user(amount, (unsigned int __user *) argp);
1289	}
1290
1291	case TIOCINQ: {
1292		struct sk_buff *skb;
1293		long amount = 0L;
1294		/* These two are safe on a single CPU system as only user tasks fiddle here */
1295		if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1296			amount = skb->len;
1297		return put_user(amount, (unsigned int __user *) argp);
1298	}
1299
1300	case SIOCGSTAMP:
1301		return sock_get_timestamp(sk, (struct timeval __user *) argp);
1302
1303	case SIOCGSTAMPNS:
1304		return sock_get_timestampns(sk, (struct timespec __user *) argp);
1305
1306	case SIOCGIFADDR:
1307	case SIOCSIFADDR:
1308	case SIOCGIFDSTADDR:
1309	case SIOCSIFDSTADDR:
1310	case SIOCGIFBRDADDR:
1311	case SIOCSIFBRDADDR:
1312	case SIOCGIFNETMASK:
1313	case SIOCSIFNETMASK:
1314	case SIOCGIFMETRIC:
1315	case SIOCSIFMETRIC:
1316		return -EINVAL;
1317
1318	case SIOCADDRT:
1319	case SIOCDELRT:
1320	case SIOCRSCLRRT:
1321		if (!capable(CAP_NET_ADMIN))
1322			return -EPERM;
1323		return rose_rt_ioctl(cmd, argp);
1324
1325	case SIOCRSGCAUSE: {
1326		struct rose_cause_struct rose_cause;
1327		rose_cause.cause      = rose->cause;
1328		rose_cause.diagnostic = rose->diagnostic;
1329		return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1330	}
1331
1332	case SIOCRSSCAUSE: {
1333		struct rose_cause_struct rose_cause;
1334		if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1335			return -EFAULT;
1336		rose->cause      = rose_cause.cause;
1337		rose->diagnostic = rose_cause.diagnostic;
1338		return 0;
1339	}
1340
1341	case SIOCRSSL2CALL:
1342		if (!capable(CAP_NET_ADMIN)) return -EPERM;
1343		if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1344			ax25_listen_release(&rose_callsign, NULL);
1345		if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1346			return -EFAULT;
1347		if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1348			return ax25_listen_register(&rose_callsign, NULL);
1349
1350		return 0;
1351
1352	case SIOCRSGL2CALL:
1353		return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1354
1355	case SIOCRSACCEPT:
1356		if (rose->state == ROSE_STATE_5) {
1357			rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1358			rose_start_idletimer(sk);
1359			rose->condition = 0x00;
1360			rose->vs        = 0;
1361			rose->va        = 0;
1362			rose->vr        = 0;
1363			rose->vl        = 0;
1364			rose->state     = ROSE_STATE_3;
1365		}
1366		return 0;
1367
1368	default:
1369		return -ENOIOCTLCMD;
1370	}
1371
1372	return 0;
1373}
1374
1375#ifdef CONFIG_PROC_FS
1376static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1377	__acquires(rose_list_lock)
1378{
1379	spin_lock_bh(&rose_list_lock);
1380	return seq_hlist_start_head(&rose_list, *pos);
1381}
1382
1383static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1384{
1385	return seq_hlist_next(v, &rose_list, pos);
1386}
1387
1388static void rose_info_stop(struct seq_file *seq, void *v)
1389	__releases(rose_list_lock)
1390{
1391	spin_unlock_bh(&rose_list_lock);
1392}
1393
1394static int rose_info_show(struct seq_file *seq, void *v)
1395{
1396	char buf[11], rsbuf[11];
1397
1398	if (v == SEQ_START_TOKEN)
1399		seq_puts(seq,
1400			 "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");
1401
1402	else {
1403		struct sock *s = sk_entry(v);
1404		struct rose_sock *rose = rose_sk(s);
1405		const char *devname, *callsign;
1406		const struct net_device *dev = rose->device;
1407
1408		if (!dev)
1409			devname = "???";
1410		else
1411			devname = dev->name;
1412
1413		seq_printf(seq, "%-10s %-9s ",
1414			   rose2asc(rsbuf, &rose->dest_addr),
1415			   ax2asc(buf, &rose->dest_call));
1416
1417		if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1418			callsign = "??????-?";
1419		else
1420			callsign = ax2asc(buf, &rose->source_call);
1421
1422		seq_printf(seq,
1423			   "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1424			rose2asc(rsbuf, &rose->source_addr),
1425			callsign,
1426			devname,
1427			rose->lci & 0x0FFF,
1428			(rose->neighbour) ? rose->neighbour->number : 0,
1429			rose->state,
1430			rose->vs,
1431			rose->vr,
1432			rose->va,
1433			ax25_display_timer(&rose->timer) / HZ,
1434			rose->t1 / HZ,
1435			rose->t2 / HZ,
1436			rose->t3 / HZ,
1437			rose->hb / HZ,
1438			ax25_display_timer(&rose->idletimer) / (60 * HZ),
1439			rose->idle / (60 * HZ),
1440			sk_wmem_alloc_get(s),
1441			sk_rmem_alloc_get(s),
1442			s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1443	}
1444
1445	return 0;
1446}
1447
1448static const struct seq_operations rose_info_seqops = {
1449	.start = rose_info_start,
1450	.next = rose_info_next,
1451	.stop = rose_info_stop,
1452	.show = rose_info_show,
1453};
1454
1455static int rose_info_open(struct inode *inode, struct file *file)
1456{
1457	return seq_open(file, &rose_info_seqops);
1458}
1459
1460static const struct file_operations rose_info_fops = {
1461	.owner = THIS_MODULE,
1462	.open = rose_info_open,
1463	.read = seq_read,
1464	.llseek = seq_lseek,
1465	.release = seq_release,
1466};
1467#endif	/* CONFIG_PROC_FS */
1468
1469static const struct net_proto_family rose_family_ops = {
1470	.family		=	PF_ROSE,
1471	.create		=	rose_create,
1472	.owner		=	THIS_MODULE,
1473};
1474
1475static const struct proto_ops rose_proto_ops = {
1476	.family		=	PF_ROSE,
1477	.owner		=	THIS_MODULE,
1478	.release	=	rose_release,
1479	.bind		=	rose_bind,
1480	.connect	=	rose_connect,
1481	.socketpair	=	sock_no_socketpair,
1482	.accept		=	rose_accept,
1483	.getname	=	rose_getname,
1484	.poll		=	datagram_poll,
1485	.ioctl		=	rose_ioctl,
1486	.listen		=	rose_listen,
1487	.shutdown	=	sock_no_shutdown,
1488	.setsockopt	=	rose_setsockopt,
1489	.getsockopt	=	rose_getsockopt,
1490	.sendmsg	=	rose_sendmsg,
1491	.recvmsg	=	rose_recvmsg,
1492	.mmap		=	sock_no_mmap,
1493	.sendpage	=	sock_no_sendpage,
1494};
1495
1496static struct notifier_block rose_dev_notifier = {
1497	.notifier_call	=	rose_device_event,
1498};
1499
1500static struct net_device **dev_rose;
1501
1502static struct ax25_protocol rose_pid = {
1503	.pid	= AX25_P_ROSE,
1504	.func	= rose_route_frame
1505};
1506
1507static struct ax25_linkfail rose_linkfail_notifier = {
1508	.func	= rose_link_failed
1509};
1510
1511static int __init rose_proto_init(void)
1512{
1513	int i;
1514	int rc;
1515
1516	if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1517		printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1518		rc = -EINVAL;
1519		goto out;
1520	}
1521
1522	rc = proto_register(&rose_proto, 0);
1523	if (rc != 0)
1524		goto out;
1525
1526	rose_callsign = null_ax25_address;
1527
1528	dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1529	if (dev_rose == NULL) {
1530		printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1531		rc = -ENOMEM;
1532		goto out_proto_unregister;
1533	}
1534
1535	for (i = 0; i < rose_ndevs; i++) {
1536		struct net_device *dev;
1537		char name[IFNAMSIZ];
1538
1539		sprintf(name, "rose%d", i);
1540		dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1541		if (!dev) {
1542			printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1543			rc = -ENOMEM;
1544			goto fail;
1545		}
1546		rc = register_netdev(dev);
1547		if (rc) {
1548			printk(KERN_ERR "ROSE: netdevice registration failed\n");
1549			free_netdev(dev);
1550			goto fail;
1551		}
1552		rose_set_lockdep_key(dev);
1553		dev_rose[i] = dev;
1554	}
1555
1556	sock_register(&rose_family_ops);
1557	register_netdevice_notifier(&rose_dev_notifier);
1558
1559	ax25_register_pid(&rose_pid);
1560	ax25_linkfail_register(&rose_linkfail_notifier);
1561
1562#ifdef CONFIG_SYSCTL
1563	rose_register_sysctl();
1564#endif
1565	rose_loopback_init();
1566
1567	rose_add_loopback_neigh();
1568
1569	proc_create("rose", S_IRUGO, init_net.proc_net, &rose_info_fops);
1570	proc_create("rose_neigh", S_IRUGO, init_net.proc_net,
1571		    &rose_neigh_fops);
1572	proc_create("rose_nodes", S_IRUGO, init_net.proc_net,
1573		    &rose_nodes_fops);
1574	proc_create("rose_routes", S_IRUGO, init_net.proc_net,
1575		    &rose_routes_fops);
1576out:
1577	return rc;
1578fail:
1579	while (--i >= 0) {
1580		unregister_netdev(dev_rose[i]);
1581		free_netdev(dev_rose[i]);
1582	}
1583	kfree(dev_rose);
1584out_proto_unregister:
1585	proto_unregister(&rose_proto);
1586	goto out;
1587}
1588module_init(rose_proto_init);
1589
1590module_param(rose_ndevs, int, 0);
1591MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1592
1593MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1594MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1595MODULE_LICENSE("GPL");
1596MODULE_ALIAS_NETPROTO(PF_ROSE);
1597
1598static void __exit rose_exit(void)
1599{
1600	int i;
1601
1602	remove_proc_entry("rose", init_net.proc_net);
1603	remove_proc_entry("rose_neigh", init_net.proc_net);
1604	remove_proc_entry("rose_nodes", init_net.proc_net);
1605	remove_proc_entry("rose_routes", init_net.proc_net);
1606	rose_loopback_clear();
1607
1608	rose_rt_free();
1609
1610	ax25_protocol_release(AX25_P_ROSE);
1611	ax25_linkfail_release(&rose_linkfail_notifier);
1612
1613	if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1614		ax25_listen_release(&rose_callsign, NULL);
1615
1616#ifdef CONFIG_SYSCTL
1617	rose_unregister_sysctl();
1618#endif
1619	unregister_netdevice_notifier(&rose_dev_notifier);
1620
1621	sock_unregister(PF_ROSE);
1622
1623	for (i = 0; i < rose_ndevs; i++) {
1624		struct net_device *dev = dev_rose[i];
1625
1626		if (dev) {
1627			unregister_netdev(dev);
1628			free_netdev(dev);
1629		}
1630	}
1631
1632	kfree(dev_rose);
1633	proto_unregister(&rose_proto);
1634}
1635
1636module_exit(rose_exit);
1637