dbc963b4f5fbb78b7c6167341776faa14f60a634
[linux-2.6.git] / net / rose / af_rose.c
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 static void rose_set_lockdep_one(struct net_device *dev,
79                                  struct netdev_queue *txq,
80                                  void *_unused)
81 {
82         lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
83 }
84
85 static void rose_set_lockdep_key(struct net_device *dev)
86 {
87         netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
88 }
89
90 /*
91  *      Convert a ROSE address into text.
92  */
93 const char *rose2asc(const rose_address *addr)
94 {
95         static char buffer[11];
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(buffer, "*");
101         } else {
102                 sprintf(buffer, "%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 buffer;
110 }
111
112 /*
113  *      Compare two ROSE addresses, 0 == equal.
114  */
115 int rosecmp(rose_address *addr1, rose_address *addr2)
116 {
117         int i;
118
119         for (i = 0; i < 5; i++)
120                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
121                         return 1;
122
123         return 0;
124 }
125
126 /*
127  *      Compare two ROSE addresses for only mask digits, 0 == equal.
128  */
129 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
130 {
131         unsigned int i, j;
132
133         if (mask > 10)
134                 return 1;
135
136         for (i = 0; i < mask; i++) {
137                 j = i / 2;
138
139                 if ((i % 2) != 0) {
140                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
141                                 return 1;
142                 } else {
143                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
144                                 return 1;
145                 }
146         }
147
148         return 0;
149 }
150
151 /*
152  *      Socket removal during an interrupt is now safe.
153  */
154 static void rose_remove_socket(struct sock *sk)
155 {
156         spin_lock_bh(&rose_list_lock);
157         sk_del_node_init(sk);
158         spin_unlock_bh(&rose_list_lock);
159 }
160
161 /*
162  *      Kill all bound sockets on a broken link layer connection to a
163  *      particular neighbour.
164  */
165 void rose_kill_by_neigh(struct rose_neigh *neigh)
166 {
167         struct sock *s;
168         struct hlist_node *node;
169
170         spin_lock_bh(&rose_list_lock);
171         sk_for_each(s, node, &rose_list) {
172                 struct rose_sock *rose = rose_sk(s);
173
174                 if (rose->neighbour == neigh) {
175                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
176                         rose->neighbour->use--;
177                         rose->neighbour = NULL;
178                 }
179         }
180         spin_unlock_bh(&rose_list_lock);
181 }
182
183 /*
184  *      Kill all bound sockets on a dropped device.
185  */
186 static void rose_kill_by_device(struct net_device *dev)
187 {
188         struct sock *s;
189         struct hlist_node *node;
190
191         spin_lock_bh(&rose_list_lock);
192         sk_for_each(s, node, &rose_list) {
193                 struct rose_sock *rose = rose_sk(s);
194
195                 if (rose->device == dev) {
196                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
197                         rose->neighbour->use--;
198                         rose->device = NULL;
199                 }
200         }
201         spin_unlock_bh(&rose_list_lock);
202 }
203
204 /*
205  *      Handle device status changes.
206  */
207 static int rose_device_event(struct notifier_block *this, unsigned long event,
208         void *ptr)
209 {
210         struct net_device *dev = (struct net_device *)ptr;
211
212         if (!net_eq(dev_net(dev), &init_net))
213                 return NOTIFY_DONE;
214
215         if (event != NETDEV_DOWN)
216                 return NOTIFY_DONE;
217
218         switch (dev->type) {
219         case ARPHRD_ROSE:
220                 rose_kill_by_device(dev);
221                 break;
222         case ARPHRD_AX25:
223                 rose_link_device_down(dev);
224                 rose_rt_device_down(dev);
225                 break;
226         }
227
228         return NOTIFY_DONE;
229 }
230
231 /*
232  *      Add a socket to the bound sockets list.
233  */
234 static void rose_insert_socket(struct sock *sk)
235 {
236
237         spin_lock_bh(&rose_list_lock);
238         sk_add_node(sk, &rose_list);
239         spin_unlock_bh(&rose_list_lock);
240 }
241
242 /*
243  *      Find a socket that wants to accept the Call Request we just
244  *      received.
245  */
246 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
247 {
248         struct sock *s;
249         struct hlist_node *node;
250
251         spin_lock_bh(&rose_list_lock);
252         sk_for_each(s, node, &rose_list) {
253                 struct rose_sock *rose = rose_sk(s);
254
255                 if (!rosecmp(&rose->source_addr, addr) &&
256                     !ax25cmp(&rose->source_call, call) &&
257                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
258                         goto found;
259         }
260
261         sk_for_each(s, node, &rose_list) {
262                 struct rose_sock *rose = rose_sk(s);
263
264                 if (!rosecmp(&rose->source_addr, addr) &&
265                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
266                     s->sk_state == TCP_LISTEN)
267                         goto found;
268         }
269         s = NULL;
270 found:
271         spin_unlock_bh(&rose_list_lock);
272         return s;
273 }
274
275 /*
276  *      Find a connected ROSE socket given my LCI and device.
277  */
278 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
279 {
280         struct sock *s;
281         struct hlist_node *node;
282
283         spin_lock_bh(&rose_list_lock);
284         sk_for_each(s, node, &rose_list) {
285                 struct rose_sock *rose = rose_sk(s);
286
287                 if (rose->lci == lci && rose->neighbour == neigh)
288                         goto found;
289         }
290         s = NULL;
291 found:
292         spin_unlock_bh(&rose_list_lock);
293         return s;
294 }
295
296 /*
297  *      Find a unique LCI for a given device.
298  */
299 unsigned int rose_new_lci(struct rose_neigh *neigh)
300 {
301         int lci;
302
303         if (neigh->dce_mode) {
304                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
305                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
306                                 return lci;
307         } else {
308                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
309                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
310                                 return lci;
311         }
312
313         return 0;
314 }
315
316 /*
317  *      Deferred destroy.
318  */
319 void rose_destroy_socket(struct sock *);
320
321 /*
322  *      Handler for deferred kills.
323  */
324 static void rose_destroy_timer(unsigned long data)
325 {
326         rose_destroy_socket((struct sock *)data);
327 }
328
329 /*
330  *      This is called from user mode and the timers. Thus it protects itself
331  *      against interrupt users but doesn't worry about being called during
332  *      work.  Once it is removed from the queue no interrupt or bottom half
333  *      will touch it and we are (fairly 8-) ) safe.
334  */
335 void rose_destroy_socket(struct sock *sk)
336 {
337         struct sk_buff *skb;
338
339         rose_remove_socket(sk);
340         rose_stop_heartbeat(sk);
341         rose_stop_idletimer(sk);
342         rose_stop_timer(sk);
343
344         rose_clear_queues(sk);          /* Flush the queues */
345
346         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
347                 if (skb->sk != sk) {    /* A pending connection */
348                         /* Queue the unaccepted socket for death */
349                         sock_set_flag(skb->sk, SOCK_DEAD);
350                         rose_start_heartbeat(skb->sk);
351                         rose_sk(skb->sk)->state = ROSE_STATE_0;
352                 }
353
354                 kfree_skb(skb);
355         }
356
357         if (atomic_read(&sk->sk_wmem_alloc) ||
358             atomic_read(&sk->sk_rmem_alloc)) {
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, 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 {
518         struct sock *sk;
519         struct rose_sock *rose;
520
521         if (net != &init_net)
522                 return -EAFNOSUPPORT;
523
524         if (sock->type != SOCK_SEQPACKET || protocol != 0)
525                 return -ESOCKTNOSUPPORT;
526
527         sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
528         if (sk == NULL)
529                 return -ENOMEM;
530
531         rose = rose_sk(sk);
532
533         sock_init_data(sock, sk);
534
535         skb_queue_head_init(&rose->ack_queue);
536 #ifdef M_BIT
537         skb_queue_head_init(&rose->frag_queue);
538         rose->fraglen    = 0;
539 #endif
540
541         sock->ops    = &rose_proto_ops;
542         sk->sk_protocol = protocol;
543
544         init_timer(&rose->timer);
545         init_timer(&rose->idletimer);
546
547         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
548         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
549         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
550         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
551         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
552
553         rose->state = ROSE_STATE_0;
554
555         return 0;
556 }
557
558 static struct sock *rose_make_new(struct sock *osk)
559 {
560         struct sock *sk;
561         struct rose_sock *rose, *orose;
562
563         if (osk->sk_type != SOCK_SEQPACKET)
564                 return NULL;
565
566         sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto);
567         if (sk == NULL)
568                 return NULL;
569
570         rose = rose_sk(sk);
571
572         sock_init_data(NULL, sk);
573
574         skb_queue_head_init(&rose->ack_queue);
575 #ifdef M_BIT
576         skb_queue_head_init(&rose->frag_queue);
577         rose->fraglen  = 0;
578 #endif
579
580         sk->sk_type     = osk->sk_type;
581         sk->sk_priority = osk->sk_priority;
582         sk->sk_protocol = osk->sk_protocol;
583         sk->sk_rcvbuf   = osk->sk_rcvbuf;
584         sk->sk_sndbuf   = osk->sk_sndbuf;
585         sk->sk_state    = TCP_ESTABLISHED;
586         sock_copy_flags(sk, osk);
587
588         init_timer(&rose->timer);
589         init_timer(&rose->idletimer);
590
591         orose           = rose_sk(osk);
592         rose->t1        = orose->t1;
593         rose->t2        = orose->t2;
594         rose->t3        = orose->t3;
595         rose->hb        = orose->hb;
596         rose->idle      = orose->idle;
597         rose->defer     = orose->defer;
598         rose->device    = orose->device;
599         rose->qbitincl  = orose->qbitincl;
600
601         return sk;
602 }
603
604 static int rose_release(struct socket *sock)
605 {
606         struct sock *sk = sock->sk;
607         struct rose_sock *rose;
608
609         if (sk == NULL) return 0;
610
611         sock_hold(sk);
612         sock_orphan(sk);
613         lock_sock(sk);
614         rose = rose_sk(sk);
615
616         switch (rose->state) {
617         case ROSE_STATE_0:
618                 release_sock(sk);
619                 rose_disconnect(sk, 0, -1, -1);
620                 lock_sock(sk);
621                 rose_destroy_socket(sk);
622                 break;
623
624         case ROSE_STATE_2:
625                 rose->neighbour->use--;
626                 release_sock(sk);
627                 rose_disconnect(sk, 0, -1, -1);
628                 lock_sock(sk);
629                 rose_destroy_socket(sk);
630                 break;
631
632         case ROSE_STATE_1:
633         case ROSE_STATE_3:
634         case ROSE_STATE_4:
635         case ROSE_STATE_5:
636                 rose_clear_queues(sk);
637                 rose_stop_idletimer(sk);
638                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
639                 rose_start_t3timer(sk);
640                 rose->state  = ROSE_STATE_2;
641                 sk->sk_state    = TCP_CLOSE;
642                 sk->sk_shutdown |= SEND_SHUTDOWN;
643                 sk->sk_state_change(sk);
644                 sock_set_flag(sk, SOCK_DEAD);
645                 sock_set_flag(sk, SOCK_DESTROY);
646                 break;
647
648         default:
649                 break;
650         }
651
652         sock->sk = NULL;
653         release_sock(sk);
654         sock_put(sk);
655
656         return 0;
657 }
658
659 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
660 {
661         struct sock *sk = sock->sk;
662         struct rose_sock *rose = rose_sk(sk);
663         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
664         struct net_device *dev;
665         ax25_address *source;
666         ax25_uid_assoc *user;
667         int n;
668
669         if (!sock_flag(sk, SOCK_ZAPPED))
670                 return -EINVAL;
671
672         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
673                 return -EINVAL;
674
675         if (addr->srose_family != AF_ROSE)
676                 return -EINVAL;
677
678         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
679                 return -EINVAL;
680
681         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
682                 return -EINVAL;
683
684         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
685                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
686                 return -EADDRNOTAVAIL;
687         }
688
689         source = &addr->srose_call;
690
691         user = ax25_findbyuid(current->euid);
692         if (user) {
693                 rose->source_call = user->call;
694                 ax25_uid_put(user);
695         } else {
696                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
697                         return -EACCES;
698                 rose->source_call   = *source;
699         }
700
701         rose->source_addr   = addr->srose_addr;
702         rose->device        = dev;
703         rose->source_ndigis = addr->srose_ndigis;
704
705         if (addr_len == sizeof(struct full_sockaddr_rose)) {
706                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
707                 for (n = 0 ; n < addr->srose_ndigis ; n++)
708                         rose->source_digis[n] = full_addr->srose_digis[n];
709         } else {
710                 if (rose->source_ndigis == 1) {
711                         rose->source_digis[0] = addr->srose_digi;
712                 }
713         }
714
715         rose_insert_socket(sk);
716
717         sock_reset_flag(sk, SOCK_ZAPPED);
718         SOCK_DEBUG(sk, "ROSE: socket is bound\n");
719         return 0;
720 }
721
722 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
723 {
724         struct sock *sk = sock->sk;
725         struct rose_sock *rose = rose_sk(sk);
726         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
727         unsigned char cause, diagnostic;
728         struct net_device *dev;
729         ax25_uid_assoc *user;
730         int n, err = 0;
731
732         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
733                 return -EINVAL;
734
735         if (addr->srose_family != AF_ROSE)
736                 return -EINVAL;
737
738         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
739                 return -EINVAL;
740
741         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
742                 return -EINVAL;
743
744         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
745         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
746                 return -EINVAL;
747
748         lock_sock(sk);
749
750         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
751                 /* Connect completed during a ERESTARTSYS event */
752                 sock->state = SS_CONNECTED;
753                 goto out_release;
754         }
755
756         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
757                 sock->state = SS_UNCONNECTED;
758                 err = -ECONNREFUSED;
759                 goto out_release;
760         }
761
762         if (sk->sk_state == TCP_ESTABLISHED) {
763                 /* No reconnect on a seqpacket socket */
764                 err = -EISCONN;
765                 goto out_release;
766         }
767
768         sk->sk_state   = TCP_CLOSE;
769         sock->state = SS_UNCONNECTED;
770
771         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
772                                          &diagnostic, 0);
773         if (!rose->neighbour) {
774                 err = -ENETUNREACH;
775                 goto out_release;
776         }
777
778         rose->lci = rose_new_lci(rose->neighbour);
779         if (!rose->lci) {
780                 err = -ENETUNREACH;
781                 goto out_release;
782         }
783
784         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
785                 sock_reset_flag(sk, SOCK_ZAPPED);
786
787                 if ((dev = rose_dev_first()) == NULL) {
788                         err = -ENETUNREACH;
789                         goto out_release;
790                 }
791
792                 user = ax25_findbyuid(current->euid);
793                 if (!user) {
794                         err = -EINVAL;
795                         goto out_release;
796                 }
797
798                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
799                 rose->source_call = user->call;
800                 rose->device      = dev;
801                 ax25_uid_put(user);
802
803                 rose_insert_socket(sk);         /* Finish the bind */
804         }
805 rose_try_next_neigh:
806         rose->dest_addr   = addr->srose_addr;
807         rose->dest_call   = addr->srose_call;
808         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
809         rose->dest_ndigis = addr->srose_ndigis;
810
811         if (addr_len == sizeof(struct full_sockaddr_rose)) {
812                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
813                 for (n = 0 ; n < addr->srose_ndigis ; n++)
814                         rose->dest_digis[n] = full_addr->srose_digis[n];
815         } else {
816                 if (rose->dest_ndigis == 1) {
817                         rose->dest_digis[0] = addr->srose_digi;
818                 }
819         }
820
821         /* Move to connecting socket, start sending Connect Requests */
822         sock->state   = SS_CONNECTING;
823         sk->sk_state     = TCP_SYN_SENT;
824
825         rose->state = ROSE_STATE_1;
826
827         rose->neighbour->use++;
828
829         rose_write_internal(sk, ROSE_CALL_REQUEST);
830         rose_start_heartbeat(sk);
831         rose_start_t1timer(sk);
832
833         /* Now the loop */
834         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
835                 err = -EINPROGRESS;
836                 goto out_release;
837         }
838
839         /*
840          * A Connect Ack with Choke or timeout or failed routing will go to
841          * closed.
842          */
843         if (sk->sk_state == TCP_SYN_SENT) {
844                 DEFINE_WAIT(wait);
845
846                 for (;;) {
847                         prepare_to_wait(sk->sk_sleep, &wait,
848                                         TASK_INTERRUPTIBLE);
849                         if (sk->sk_state != TCP_SYN_SENT)
850                                 break;
851                         if (!signal_pending(current)) {
852                                 release_sock(sk);
853                                 schedule();
854                                 lock_sock(sk);
855                                 continue;
856                         }
857                         err = -ERESTARTSYS;
858                         break;
859                 }
860                 finish_wait(sk->sk_sleep, &wait);
861
862                 if (err)
863                         goto out_release;
864         }
865
866         if (sk->sk_state != TCP_ESTABLISHED) {
867         /* Try next neighbour */
868                 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic, 0);
869                 if (rose->neighbour)
870                         goto rose_try_next_neigh;
871
872                 /* No more neighbours */
873                 sock->state = SS_UNCONNECTED;
874                 err = sock_error(sk);   /* Always set at this point */
875                 goto out_release;
876         }
877
878         sock->state = SS_CONNECTED;
879
880 out_release:
881         release_sock(sk);
882
883         return err;
884 }
885
886 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
887 {
888         struct sk_buff *skb;
889         struct sock *newsk;
890         DEFINE_WAIT(wait);
891         struct sock *sk;
892         int err = 0;
893
894         if ((sk = sock->sk) == NULL)
895                 return -EINVAL;
896
897         lock_sock(sk);
898         if (sk->sk_type != SOCK_SEQPACKET) {
899                 err = -EOPNOTSUPP;
900                 goto out_release;
901         }
902
903         if (sk->sk_state != TCP_LISTEN) {
904                 err = -EINVAL;
905                 goto out_release;
906         }
907
908         /*
909          *      The write queue this time is holding sockets ready to use
910          *      hooked into the SABM we saved
911          */
912         for (;;) {
913                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
914
915                 skb = skb_dequeue(&sk->sk_receive_queue);
916                 if (skb)
917                         break;
918
919                 if (flags & O_NONBLOCK) {
920                         err = -EWOULDBLOCK;
921                         break;
922                 }
923                 if (!signal_pending(current)) {
924                         release_sock(sk);
925                         schedule();
926                         lock_sock(sk);
927                         continue;
928                 }
929                 err = -ERESTARTSYS;
930                 break;
931         }
932         finish_wait(sk->sk_sleep, &wait);
933         if (err)
934                 goto out_release;
935
936         newsk = skb->sk;
937         sock_graft(newsk, newsock);
938
939         /* Now attach up the new socket */
940         skb->sk = NULL;
941         kfree_skb(skb);
942         sk->sk_ack_backlog--;
943
944 out_release:
945         release_sock(sk);
946
947         return err;
948 }
949
950 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
951         int *uaddr_len, int peer)
952 {
953         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
954         struct sock *sk = sock->sk;
955         struct rose_sock *rose = rose_sk(sk);
956         int n;
957
958         if (peer != 0) {
959                 if (sk->sk_state != TCP_ESTABLISHED)
960                         return -ENOTCONN;
961                 srose->srose_family = AF_ROSE;
962                 srose->srose_addr   = rose->dest_addr;
963                 srose->srose_call   = rose->dest_call;
964                 srose->srose_ndigis = rose->dest_ndigis;
965                 for (n = 0; n < rose->dest_ndigis; n++)
966                         srose->srose_digis[n] = rose->dest_digis[n];
967         } else {
968                 srose->srose_family = AF_ROSE;
969                 srose->srose_addr   = rose->source_addr;
970                 srose->srose_call   = rose->source_call;
971                 srose->srose_ndigis = rose->source_ndigis;
972                 for (n = 0; n < rose->source_ndigis; n++)
973                         srose->srose_digis[n] = rose->source_digis[n];
974         }
975
976         *uaddr_len = sizeof(struct full_sockaddr_rose);
977         return 0;
978 }
979
980 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
981 {
982         struct sock *sk;
983         struct sock *make;
984         struct rose_sock *make_rose;
985         struct rose_facilities_struct facilities;
986         int n, len;
987
988         skb->sk = NULL;         /* Initially we don't know who it's for */
989
990         /*
991          *      skb->data points to the rose frame start
992          */
993         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
994
995         len  = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
996         len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
997         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
998                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
999                 return 0;
1000         }
1001
1002         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1003
1004         /*
1005          * We can't accept the Call Request.
1006          */
1007         if (sk == NULL || sk_acceptq_is_full(sk) ||
1008             (make = rose_make_new(sk)) == NULL) {
1009                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1010                 return 0;
1011         }
1012
1013         skb->sk     = make;
1014         make->sk_state = TCP_ESTABLISHED;
1015         make_rose = rose_sk(make);
1016
1017         make_rose->lci           = lci;
1018         make_rose->dest_addr     = facilities.dest_addr;
1019         make_rose->dest_call     = facilities.dest_call;
1020         make_rose->dest_ndigis   = facilities.dest_ndigis;
1021         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1022                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1023         make_rose->source_addr   = facilities.source_addr;
1024         make_rose->source_call   = facilities.source_call;
1025         make_rose->source_ndigis = facilities.source_ndigis;
1026         for (n = 0 ; n < facilities.source_ndigis ; n++)
1027                 make_rose->source_digis[n]= facilities.source_digis[n];
1028         make_rose->neighbour     = neigh;
1029         make_rose->device        = dev;
1030         make_rose->facilities    = facilities;
1031
1032         make_rose->neighbour->use++;
1033
1034         if (rose_sk(sk)->defer) {
1035                 make_rose->state = ROSE_STATE_5;
1036         } else {
1037                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1038                 make_rose->state = ROSE_STATE_3;
1039                 rose_start_idletimer(make);
1040         }
1041
1042         make_rose->condition = 0x00;
1043         make_rose->vs        = 0;
1044         make_rose->va        = 0;
1045         make_rose->vr        = 0;
1046         make_rose->vl        = 0;
1047         sk->sk_ack_backlog++;
1048
1049         rose_insert_socket(make);
1050
1051         skb_queue_head(&sk->sk_receive_queue, skb);
1052
1053         rose_start_heartbeat(make);
1054
1055         if (!sock_flag(sk, SOCK_DEAD))
1056                 sk->sk_data_ready(sk, skb->len);
1057
1058         return 1;
1059 }
1060
1061 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1062                         struct msghdr *msg, size_t len)
1063 {
1064         struct sock *sk = sock->sk;
1065         struct rose_sock *rose = rose_sk(sk);
1066         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1067         int err;
1068         struct full_sockaddr_rose srose;
1069         struct sk_buff *skb;
1070         unsigned char *asmptr;
1071         int n, size, qbit = 0;
1072
1073         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1074                 return -EINVAL;
1075
1076         if (sock_flag(sk, SOCK_ZAPPED))
1077                 return -EADDRNOTAVAIL;
1078
1079         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1080                 send_sig(SIGPIPE, current, 0);
1081                 return -EPIPE;
1082         }
1083
1084         if (rose->neighbour == NULL || rose->device == NULL)
1085                 return -ENETUNREACH;
1086
1087         if (usrose != NULL) {
1088                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1089                         return -EINVAL;
1090                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1091                 memcpy(&srose, usrose, msg->msg_namelen);
1092                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1093                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1094                         return -EISCONN;
1095                 if (srose.srose_ndigis != rose->dest_ndigis)
1096                         return -EISCONN;
1097                 if (srose.srose_ndigis == rose->dest_ndigis) {
1098                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1099                                 if (ax25cmp(&rose->dest_digis[n],
1100                                             &srose.srose_digis[n]))
1101                                         return -EISCONN;
1102                 }
1103                 if (srose.srose_family != AF_ROSE)
1104                         return -EINVAL;
1105         } else {
1106                 if (sk->sk_state != TCP_ESTABLISHED)
1107                         return -ENOTCONN;
1108
1109                 srose.srose_family = AF_ROSE;
1110                 srose.srose_addr   = rose->dest_addr;
1111                 srose.srose_call   = rose->dest_call;
1112                 srose.srose_ndigis = rose->dest_ndigis;
1113                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1114                         srose.srose_digis[n] = rose->dest_digis[n];
1115         }
1116
1117         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1118
1119         /* Build a packet */
1120         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1121         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1122
1123         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1124                 return err;
1125
1126         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1127
1128         /*
1129          *      Put the data on the end
1130          */
1131         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1132
1133         skb_reset_transport_header(skb);
1134         skb_put(skb, len);
1135
1136         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1137         if (err) {
1138                 kfree_skb(skb);
1139                 return err;
1140         }
1141
1142         /*
1143          *      If the Q BIT Include socket option is in force, the first
1144          *      byte of the user data is the logical value of the Q Bit.
1145          */
1146         if (rose->qbitincl) {
1147                 qbit = skb->data[0];
1148                 skb_pull(skb, 1);
1149         }
1150
1151         /*
1152          *      Push down the ROSE header
1153          */
1154         asmptr = skb_push(skb, ROSE_MIN_LEN);
1155
1156         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1157
1158         /* Build a ROSE Network header */
1159         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1160         asmptr[1] = (rose->lci >> 0) & 0xFF;
1161         asmptr[2] = ROSE_DATA;
1162
1163         if (qbit)
1164                 asmptr[0] |= ROSE_Q_BIT;
1165
1166         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1167
1168         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1169
1170         if (sk->sk_state != TCP_ESTABLISHED) {
1171                 kfree_skb(skb);
1172                 return -ENOTCONN;
1173         }
1174
1175 #ifdef M_BIT
1176 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1177         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1178                 unsigned char header[ROSE_MIN_LEN];
1179                 struct sk_buff *skbn;
1180                 int frontlen;
1181                 int lg;
1182
1183                 /* Save a copy of the Header */
1184                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1185                 skb_pull(skb, ROSE_MIN_LEN);
1186
1187                 frontlen = skb_headroom(skb);
1188
1189                 while (skb->len > 0) {
1190                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1191                                 kfree_skb(skb);
1192                                 return err;
1193                         }
1194
1195                         skbn->sk   = sk;
1196                         skbn->free = 1;
1197                         skbn->arp  = 1;
1198
1199                         skb_reserve(skbn, frontlen);
1200
1201                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1202
1203                         /* Copy the user data */
1204                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1205                         skb_pull(skb, lg);
1206
1207                         /* Duplicate the Header */
1208                         skb_push(skbn, ROSE_MIN_LEN);
1209                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1210
1211                         if (skb->len > 0)
1212                                 skbn->data[2] |= M_BIT;
1213
1214                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1215                 }
1216
1217                 skb->free = 1;
1218                 kfree_skb(skb);
1219         } else {
1220                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1221         }
1222 #else
1223         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1224 #endif
1225
1226         rose_kick(sk);
1227
1228         return len;
1229 }
1230
1231
1232 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1233                         struct msghdr *msg, size_t size, int flags)
1234 {
1235         struct sock *sk = sock->sk;
1236         struct rose_sock *rose = rose_sk(sk);
1237         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1238         size_t copied;
1239         unsigned char *asmptr;
1240         struct sk_buff *skb;
1241         int n, er, qbit;
1242
1243         /*
1244          * This works for seqpacket too. The receiver has ordered the queue for
1245          * us! We do one quick check first though
1246          */
1247         if (sk->sk_state != TCP_ESTABLISHED)
1248                 return -ENOTCONN;
1249
1250         /* Now we can treat all alike */
1251         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1252                 return er;
1253
1254         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1255
1256         skb_pull(skb, ROSE_MIN_LEN);
1257
1258         if (rose->qbitincl) {
1259                 asmptr  = skb_push(skb, 1);
1260                 *asmptr = qbit;
1261         }
1262
1263         skb_reset_transport_header(skb);
1264         copied     = skb->len;
1265
1266         if (copied > size) {
1267                 copied = size;
1268                 msg->msg_flags |= MSG_TRUNC;
1269         }
1270
1271         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1272
1273         if (srose != NULL) {
1274                 srose->srose_family = AF_ROSE;
1275                 srose->srose_addr   = rose->dest_addr;
1276                 srose->srose_call   = rose->dest_call;
1277                 srose->srose_ndigis = rose->dest_ndigis;
1278                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1279                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1280                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1281                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1282                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1283                 } else {
1284                         if (rose->dest_ndigis >= 1) {
1285                                 srose->srose_ndigis = 1;
1286                                 srose->srose_digi = rose->dest_digis[0];
1287                         }
1288                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1289                 }
1290         }
1291
1292         skb_free_datagram(sk, skb);
1293
1294         return copied;
1295 }
1296
1297
1298 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1299 {
1300         struct sock *sk = sock->sk;
1301         struct rose_sock *rose = rose_sk(sk);
1302         void __user *argp = (void __user *)arg;
1303
1304         switch (cmd) {
1305         case TIOCOUTQ: {
1306                 long amount;
1307                 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1308                 if (amount < 0)
1309                         amount = 0;
1310                 return put_user(amount, (unsigned int __user *) argp);
1311         }
1312
1313         case TIOCINQ: {
1314                 struct sk_buff *skb;
1315                 long amount = 0L;
1316                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1317                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1318                         amount = skb->len;
1319                 return put_user(amount, (unsigned int __user *) argp);
1320         }
1321
1322         case SIOCGSTAMP:
1323                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1324
1325         case SIOCGSTAMPNS:
1326                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1327
1328         case SIOCGIFADDR:
1329         case SIOCSIFADDR:
1330         case SIOCGIFDSTADDR:
1331         case SIOCSIFDSTADDR:
1332         case SIOCGIFBRDADDR:
1333         case SIOCSIFBRDADDR:
1334         case SIOCGIFNETMASK:
1335         case SIOCSIFNETMASK:
1336         case SIOCGIFMETRIC:
1337         case SIOCSIFMETRIC:
1338                 return -EINVAL;
1339
1340         case SIOCADDRT:
1341         case SIOCDELRT:
1342         case SIOCRSCLRRT:
1343                 if (!capable(CAP_NET_ADMIN))
1344                         return -EPERM;
1345                 return rose_rt_ioctl(cmd, argp);
1346
1347         case SIOCRSGCAUSE: {
1348                 struct rose_cause_struct rose_cause;
1349                 rose_cause.cause      = rose->cause;
1350                 rose_cause.diagnostic = rose->diagnostic;
1351                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1352         }
1353
1354         case SIOCRSSCAUSE: {
1355                 struct rose_cause_struct rose_cause;
1356                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1357                         return -EFAULT;
1358                 rose->cause      = rose_cause.cause;
1359                 rose->diagnostic = rose_cause.diagnostic;
1360                 return 0;
1361         }
1362
1363         case SIOCRSSL2CALL:
1364                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1365                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1366                         ax25_listen_release(&rose_callsign, NULL);
1367                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1368                         return -EFAULT;
1369                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1370                         return ax25_listen_register(&rose_callsign, NULL);
1371
1372                 return 0;
1373
1374         case SIOCRSGL2CALL:
1375                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1376
1377         case SIOCRSACCEPT:
1378                 if (rose->state == ROSE_STATE_5) {
1379                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1380                         rose_start_idletimer(sk);
1381                         rose->condition = 0x00;
1382                         rose->vs        = 0;
1383                         rose->va        = 0;
1384                         rose->vr        = 0;
1385                         rose->vl        = 0;
1386                         rose->state     = ROSE_STATE_3;
1387                 }
1388                 return 0;
1389
1390         default:
1391                 return -ENOIOCTLCMD;
1392         }
1393
1394         return 0;
1395 }
1396
1397 #ifdef CONFIG_PROC_FS
1398 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1399         __acquires(rose_list_lock)
1400 {
1401         int i;
1402         struct sock *s;
1403         struct hlist_node *node;
1404
1405         spin_lock_bh(&rose_list_lock);
1406         if (*pos == 0)
1407                 return SEQ_START_TOKEN;
1408
1409         i = 1;
1410         sk_for_each(s, node, &rose_list) {
1411                 if (i == *pos)
1412                         return s;
1413                 ++i;
1414         }
1415         return NULL;
1416 }
1417
1418 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1419 {
1420         ++*pos;
1421
1422         return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1423                 : sk_next((struct sock *)v);
1424 }
1425
1426 static void rose_info_stop(struct seq_file *seq, void *v)
1427         __releases(rose_list_lock)
1428 {
1429         spin_unlock_bh(&rose_list_lock);
1430 }
1431
1432 static int rose_info_show(struct seq_file *seq, void *v)
1433 {
1434         char buf[11];
1435
1436         if (v == SEQ_START_TOKEN)
1437                 seq_puts(seq,
1438                          "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");
1439
1440         else {
1441                 struct sock *s = v;
1442                 struct rose_sock *rose = rose_sk(s);
1443                 const char *devname, *callsign;
1444                 const struct net_device *dev = rose->device;
1445
1446                 if (!dev)
1447                         devname = "???";
1448                 else
1449                         devname = dev->name;
1450
1451                 seq_printf(seq, "%-10s %-9s ",
1452                         rose2asc(&rose->dest_addr),
1453                         ax2asc(buf, &rose->dest_call));
1454
1455                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1456                         callsign = "??????-?";
1457                 else
1458                         callsign = ax2asc(buf, &rose->source_call);
1459
1460                 seq_printf(seq,
1461                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1462                         rose2asc(&rose->source_addr),
1463                         callsign,
1464                         devname,
1465                         rose->lci & 0x0FFF,
1466                         (rose->neighbour) ? rose->neighbour->number : 0,
1467                         rose->state,
1468                         rose->vs,
1469                         rose->vr,
1470                         rose->va,
1471                         ax25_display_timer(&rose->timer) / HZ,
1472                         rose->t1 / HZ,
1473                         rose->t2 / HZ,
1474                         rose->t3 / HZ,
1475                         rose->hb / HZ,
1476                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1477                         rose->idle / (60 * HZ),
1478                         atomic_read(&s->sk_wmem_alloc),
1479                         atomic_read(&s->sk_rmem_alloc),
1480                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1481         }
1482
1483         return 0;
1484 }
1485
1486 static const struct seq_operations rose_info_seqops = {
1487         .start = rose_info_start,
1488         .next = rose_info_next,
1489         .stop = rose_info_stop,
1490         .show = rose_info_show,
1491 };
1492
1493 static int rose_info_open(struct inode *inode, struct file *file)
1494 {
1495         return seq_open(file, &rose_info_seqops);
1496 }
1497
1498 static const struct file_operations rose_info_fops = {
1499         .owner = THIS_MODULE,
1500         .open = rose_info_open,
1501         .read = seq_read,
1502         .llseek = seq_lseek,
1503         .release = seq_release,
1504 };
1505 #endif  /* CONFIG_PROC_FS */
1506
1507 static struct net_proto_family rose_family_ops = {
1508         .family         =       PF_ROSE,
1509         .create         =       rose_create,
1510         .owner          =       THIS_MODULE,
1511 };
1512
1513 static struct proto_ops rose_proto_ops = {
1514         .family         =       PF_ROSE,
1515         .owner          =       THIS_MODULE,
1516         .release        =       rose_release,
1517         .bind           =       rose_bind,
1518         .connect        =       rose_connect,
1519         .socketpair     =       sock_no_socketpair,
1520         .accept         =       rose_accept,
1521         .getname        =       rose_getname,
1522         .poll           =       datagram_poll,
1523         .ioctl          =       rose_ioctl,
1524         .listen         =       rose_listen,
1525         .shutdown       =       sock_no_shutdown,
1526         .setsockopt     =       rose_setsockopt,
1527         .getsockopt     =       rose_getsockopt,
1528         .sendmsg        =       rose_sendmsg,
1529         .recvmsg        =       rose_recvmsg,
1530         .mmap           =       sock_no_mmap,
1531         .sendpage       =       sock_no_sendpage,
1532 };
1533
1534 static struct notifier_block rose_dev_notifier = {
1535         .notifier_call  =       rose_device_event,
1536 };
1537
1538 static struct net_device **dev_rose;
1539
1540 static struct ax25_protocol rose_pid = {
1541         .pid    = AX25_P_ROSE,
1542         .func   = rose_route_frame
1543 };
1544
1545 static struct ax25_linkfail rose_linkfail_notifier = {
1546         .func   = rose_link_failed
1547 };
1548
1549 static int __init rose_proto_init(void)
1550 {
1551         int i;
1552         int rc;
1553
1554         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1555                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1556                 rc = -EINVAL;
1557                 goto out;
1558         }
1559
1560         rc = proto_register(&rose_proto, 0);
1561         if (rc != 0)
1562                 goto out;
1563
1564         rose_callsign = null_ax25_address;
1565
1566         dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1567         if (dev_rose == NULL) {
1568                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1569                 rc = -ENOMEM;
1570                 goto out_proto_unregister;
1571         }
1572
1573         for (i = 0; i < rose_ndevs; i++) {
1574                 struct net_device *dev;
1575                 char name[IFNAMSIZ];
1576
1577                 sprintf(name, "rose%d", i);
1578                 dev = alloc_netdev(sizeof(struct net_device_stats),
1579                                    name, rose_setup);
1580                 if (!dev) {
1581                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1582                         rc = -ENOMEM;
1583                         goto fail;
1584                 }
1585                 rc = register_netdev(dev);
1586                 if (rc) {
1587                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1588                         free_netdev(dev);
1589                         goto fail;
1590                 }
1591                 rose_set_lockdep_key(dev);
1592                 dev_rose[i] = dev;
1593         }
1594
1595         sock_register(&rose_family_ops);
1596         register_netdevice_notifier(&rose_dev_notifier);
1597
1598         ax25_register_pid(&rose_pid);
1599         ax25_linkfail_register(&rose_linkfail_notifier);
1600
1601 #ifdef CONFIG_SYSCTL
1602         rose_register_sysctl();
1603 #endif
1604         rose_loopback_init();
1605
1606         rose_add_loopback_neigh();
1607
1608         proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1609         proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1610         proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1611         proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1612 out:
1613         return rc;
1614 fail:
1615         while (--i >= 0) {
1616                 unregister_netdev(dev_rose[i]);
1617                 free_netdev(dev_rose[i]);
1618         }
1619         kfree(dev_rose);
1620 out_proto_unregister:
1621         proto_unregister(&rose_proto);
1622         goto out;
1623 }
1624 module_init(rose_proto_init);
1625
1626 module_param(rose_ndevs, int, 0);
1627 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1628
1629 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1630 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1631 MODULE_LICENSE("GPL");
1632 MODULE_ALIAS_NETPROTO(PF_ROSE);
1633
1634 static void __exit rose_exit(void)
1635 {
1636         int i;
1637
1638         proc_net_remove(&init_net, "rose");
1639         proc_net_remove(&init_net, "rose_neigh");
1640         proc_net_remove(&init_net, "rose_nodes");
1641         proc_net_remove(&init_net, "rose_routes");
1642         rose_loopback_clear();
1643
1644         rose_rt_free();
1645
1646         ax25_protocol_release(AX25_P_ROSE);
1647         ax25_linkfail_release(&rose_linkfail_notifier);
1648
1649         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1650                 ax25_listen_release(&rose_callsign, NULL);
1651
1652 #ifdef CONFIG_SYSCTL
1653         rose_unregister_sysctl();
1654 #endif
1655         unregister_netdevice_notifier(&rose_dev_notifier);
1656
1657         sock_unregister(PF_ROSE);
1658
1659         for (i = 0; i < rose_ndevs; i++) {
1660                 struct net_device *dev = dev_rose[i];
1661
1662                 if (dev) {
1663                         unregister_netdev(dev);
1664                         free_netdev(dev);
1665                 }
1666         }
1667
1668         kfree(dev_rose);
1669         proto_unregister(&rose_proto);
1670 }
1671
1672 module_exit(rose_exit);