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