4a31a81059abb93a34c176d14e41b33e1f2e6fd8
[linux-3.10.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 /*
79  *      Convert a ROSE address into text.
80  */
81 const char *rose2asc(const rose_address *addr)
82 {
83         static char buffer[11];
84
85         if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
86             addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
87             addr->rose_addr[4] == 0x00) {
88                 strcpy(buffer, "*");
89         } else {
90                 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
91                                                 addr->rose_addr[1] & 0xFF,
92                                                 addr->rose_addr[2] & 0xFF,
93                                                 addr->rose_addr[3] & 0xFF,
94                                                 addr->rose_addr[4] & 0xFF);
95         }
96
97         return buffer;
98 }
99
100 /*
101  *      Compare two ROSE addresses, 0 == equal.
102  */
103 int rosecmp(rose_address *addr1, rose_address *addr2)
104 {
105         int i;
106
107         for (i = 0; i < 5; i++)
108                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
109                         return 1;
110
111         return 0;
112 }
113
114 /*
115  *      Compare two ROSE addresses for only mask digits, 0 == equal.
116  */
117 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
118 {
119         unsigned int i, j;
120
121         if (mask > 10)
122                 return 1;
123
124         for (i = 0; i < mask; i++) {
125                 j = i / 2;
126
127                 if ((i % 2) != 0) {
128                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
129                                 return 1;
130                 } else {
131                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
132                                 return 1;
133                 }
134         }
135
136         return 0;
137 }
138
139 /*
140  *      Socket removal during an interrupt is now safe.
141  */
142 static void rose_remove_socket(struct sock *sk)
143 {
144         spin_lock_bh(&rose_list_lock);
145         sk_del_node_init(sk);
146         spin_unlock_bh(&rose_list_lock);
147 }
148
149 /*
150  *      Kill all bound sockets on a broken link layer connection to a
151  *      particular neighbour.
152  */
153 void rose_kill_by_neigh(struct rose_neigh *neigh)
154 {
155         struct sock *s;
156         struct hlist_node *node;
157
158         spin_lock_bh(&rose_list_lock);
159         sk_for_each(s, node, &rose_list) {
160                 struct rose_sock *rose = rose_sk(s);
161
162                 if (rose->neighbour == neigh) {
163                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
164                         rose->neighbour->use--;
165                         rose->neighbour = NULL;
166                 }
167         }
168         spin_unlock_bh(&rose_list_lock);
169 }
170
171 /*
172  *      Kill all bound sockets on a dropped device.
173  */
174 static void rose_kill_by_device(struct net_device *dev)
175 {
176         struct sock *s;
177         struct hlist_node *node;
178
179         spin_lock_bh(&rose_list_lock);
180         sk_for_each(s, node, &rose_list) {
181                 struct rose_sock *rose = rose_sk(s);
182
183                 if (rose->device == dev) {
184                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
185                         rose->neighbour->use--;
186                         rose->device = NULL;
187                 }
188         }
189         spin_unlock_bh(&rose_list_lock);
190 }
191
192 /*
193  *      Handle device status changes.
194  */
195 static int rose_device_event(struct notifier_block *this, unsigned long event,
196         void *ptr)
197 {
198         struct net_device *dev = (struct net_device *)ptr;
199
200         if (dev->nd_net != &init_net)
201                 return NOTIFY_DONE;
202
203         if (event != NETDEV_DOWN)
204                 return NOTIFY_DONE;
205
206         switch (dev->type) {
207         case ARPHRD_ROSE:
208                 rose_kill_by_device(dev);
209                 break;
210         case ARPHRD_AX25:
211                 rose_link_device_down(dev);
212                 rose_rt_device_down(dev);
213                 break;
214         }
215
216         return NOTIFY_DONE;
217 }
218
219 /*
220  *      Add a socket to the bound sockets list.
221  */
222 static void rose_insert_socket(struct sock *sk)
223 {
224
225         spin_lock_bh(&rose_list_lock);
226         sk_add_node(sk, &rose_list);
227         spin_unlock_bh(&rose_list_lock);
228 }
229
230 /*
231  *      Find a socket that wants to accept the Call Request we just
232  *      received.
233  */
234 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
235 {
236         struct sock *s;
237         struct hlist_node *node;
238
239         spin_lock_bh(&rose_list_lock);
240         sk_for_each(s, node, &rose_list) {
241                 struct rose_sock *rose = rose_sk(s);
242
243                 if (!rosecmp(&rose->source_addr, addr) &&
244                     !ax25cmp(&rose->source_call, call) &&
245                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
246                         goto found;
247         }
248
249         sk_for_each(s, node, &rose_list) {
250                 struct rose_sock *rose = rose_sk(s);
251
252                 if (!rosecmp(&rose->source_addr, addr) &&
253                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
254                     s->sk_state == TCP_LISTEN)
255                         goto found;
256         }
257         s = NULL;
258 found:
259         spin_unlock_bh(&rose_list_lock);
260         return s;
261 }
262
263 /*
264  *      Find a connected ROSE socket given my LCI and device.
265  */
266 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
267 {
268         struct sock *s;
269         struct hlist_node *node;
270
271         spin_lock_bh(&rose_list_lock);
272         sk_for_each(s, node, &rose_list) {
273                 struct rose_sock *rose = rose_sk(s);
274
275                 if (rose->lci == lci && rose->neighbour == neigh)
276                         goto found;
277         }
278         s = NULL;
279 found:
280         spin_unlock_bh(&rose_list_lock);
281         return s;
282 }
283
284 /*
285  *      Find a unique LCI for a given device.
286  */
287 unsigned int rose_new_lci(struct rose_neigh *neigh)
288 {
289         int lci;
290
291         if (neigh->dce_mode) {
292                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
293                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
294                                 return lci;
295         } else {
296                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
297                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
298                                 return lci;
299         }
300
301         return 0;
302 }
303
304 /*
305  *      Deferred destroy.
306  */
307 void rose_destroy_socket(struct sock *);
308
309 /*
310  *      Handler for deferred kills.
311  */
312 static void rose_destroy_timer(unsigned long data)
313 {
314         rose_destroy_socket((struct sock *)data);
315 }
316
317 /*
318  *      This is called from user mode and the timers. Thus it protects itself
319  *      against interrupt users but doesn't worry about being called during
320  *      work.  Once it is removed from the queue no interrupt or bottom half
321  *      will touch it and we are (fairly 8-) ) safe.
322  */
323 void rose_destroy_socket(struct sock *sk)
324 {
325         struct sk_buff *skb;
326
327         rose_remove_socket(sk);
328         rose_stop_heartbeat(sk);
329         rose_stop_idletimer(sk);
330         rose_stop_timer(sk);
331
332         rose_clear_queues(sk);          /* Flush the queues */
333
334         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
335                 if (skb->sk != sk) {    /* A pending connection */
336                         /* Queue the unaccepted socket for death */
337                         sock_set_flag(skb->sk, SOCK_DEAD);
338                         rose_start_heartbeat(skb->sk);
339                         rose_sk(skb->sk)->state = ROSE_STATE_0;
340                 }
341
342                 kfree_skb(skb);
343         }
344
345         if (atomic_read(&sk->sk_wmem_alloc) ||
346             atomic_read(&sk->sk_rmem_alloc)) {
347                 /* Defer: outstanding buffers */
348                 setup_timer(&sk->sk_timer, rose_destroy_timer,
349                                 (unsigned long)sk);
350                 sk->sk_timer.expires  = jiffies + 10 * HZ;
351                 add_timer(&sk->sk_timer);
352         } else
353                 sock_put(sk);
354 }
355
356 /*
357  *      Handling for system calls applied via the various interfaces to a
358  *      ROSE socket object.
359  */
360
361 static int rose_setsockopt(struct socket *sock, int level, int optname,
362         char __user *optval, int optlen)
363 {
364         struct sock *sk = sock->sk;
365         struct rose_sock *rose = rose_sk(sk);
366         int opt;
367
368         if (level != SOL_ROSE)
369                 return -ENOPROTOOPT;
370
371         if (optlen < sizeof(int))
372                 return -EINVAL;
373
374         if (get_user(opt, (int __user *)optval))
375                 return -EFAULT;
376
377         switch (optname) {
378         case ROSE_DEFER:
379                 rose->defer = opt ? 1 : 0;
380                 return 0;
381
382         case ROSE_T1:
383                 if (opt < 1)
384                         return -EINVAL;
385                 rose->t1 = opt * HZ;
386                 return 0;
387
388         case ROSE_T2:
389                 if (opt < 1)
390                         return -EINVAL;
391                 rose->t2 = opt * HZ;
392                 return 0;
393
394         case ROSE_T3:
395                 if (opt < 1)
396                         return -EINVAL;
397                 rose->t3 = opt * HZ;
398                 return 0;
399
400         case ROSE_HOLDBACK:
401                 if (opt < 1)
402                         return -EINVAL;
403                 rose->hb = opt * HZ;
404                 return 0;
405
406         case ROSE_IDLE:
407                 if (opt < 0)
408                         return -EINVAL;
409                 rose->idle = opt * 60 * HZ;
410                 return 0;
411
412         case ROSE_QBITINCL:
413                 rose->qbitincl = opt ? 1 : 0;
414                 return 0;
415
416         default:
417                 return -ENOPROTOOPT;
418         }
419 }
420
421 static int rose_getsockopt(struct socket *sock, int level, int optname,
422         char __user *optval, int __user *optlen)
423 {
424         struct sock *sk = sock->sk;
425         struct rose_sock *rose = rose_sk(sk);
426         int val = 0;
427         int len;
428
429         if (level != SOL_ROSE)
430                 return -ENOPROTOOPT;
431
432         if (get_user(len, optlen))
433                 return -EFAULT;
434
435         if (len < 0)
436                 return -EINVAL;
437
438         switch (optname) {
439         case ROSE_DEFER:
440                 val = rose->defer;
441                 break;
442
443         case ROSE_T1:
444                 val = rose->t1 / HZ;
445                 break;
446
447         case ROSE_T2:
448                 val = rose->t2 / HZ;
449                 break;
450
451         case ROSE_T3:
452                 val = rose->t3 / HZ;
453                 break;
454
455         case ROSE_HOLDBACK:
456                 val = rose->hb / HZ;
457                 break;
458
459         case ROSE_IDLE:
460                 val = rose->idle / (60 * HZ);
461                 break;
462
463         case ROSE_QBITINCL:
464                 val = rose->qbitincl;
465                 break;
466
467         default:
468                 return -ENOPROTOOPT;
469         }
470
471         len = min_t(unsigned int, len, sizeof(int));
472
473         if (put_user(len, optlen))
474                 return -EFAULT;
475
476         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
477 }
478
479 static int rose_listen(struct socket *sock, int backlog)
480 {
481         struct sock *sk = sock->sk;
482
483         if (sk->sk_state != TCP_LISTEN) {
484                 struct rose_sock *rose = rose_sk(sk);
485
486                 rose->dest_ndigis = 0;
487                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
488                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
489                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
490                 sk->sk_max_ack_backlog = backlog;
491                 sk->sk_state           = TCP_LISTEN;
492                 return 0;
493         }
494
495         return -EOPNOTSUPP;
496 }
497
498 static struct proto rose_proto = {
499         .name     = "ROSE",
500         .owner    = THIS_MODULE,
501         .obj_size = sizeof(struct rose_sock),
502 };
503
504 static int rose_create(struct net *net, struct socket *sock, int protocol)
505 {
506         struct sock *sk;
507         struct rose_sock *rose;
508
509         if (net != &init_net)
510                 return -EAFNOSUPPORT;
511
512         if (sock->type != SOCK_SEQPACKET || protocol != 0)
513                 return -ESOCKTNOSUPPORT;
514
515         sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
516         if (sk == NULL)
517                 return -ENOMEM;
518
519         rose = rose_sk(sk);
520
521         sock_init_data(sock, sk);
522
523         skb_queue_head_init(&rose->ack_queue);
524 #ifdef M_BIT
525         skb_queue_head_init(&rose->frag_queue);
526         rose->fraglen    = 0;
527 #endif
528
529         sock->ops    = &rose_proto_ops;
530         sk->sk_protocol = protocol;
531
532         init_timer(&rose->timer);
533         init_timer(&rose->idletimer);
534
535         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
536         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
537         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
538         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
539         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
540
541         rose->state = ROSE_STATE_0;
542
543         return 0;
544 }
545
546 static struct sock *rose_make_new(struct sock *osk)
547 {
548         struct sock *sk;
549         struct rose_sock *rose, *orose;
550
551         if (osk->sk_type != SOCK_SEQPACKET)
552                 return NULL;
553
554         sk = sk_alloc(osk->sk_net, PF_ROSE, GFP_ATOMIC, &rose_proto);
555         if (sk == NULL)
556                 return NULL;
557
558         rose = rose_sk(sk);
559
560         sock_init_data(NULL, sk);
561
562         skb_queue_head_init(&rose->ack_queue);
563 #ifdef M_BIT
564         skb_queue_head_init(&rose->frag_queue);
565         rose->fraglen  = 0;
566 #endif
567
568         sk->sk_type     = osk->sk_type;
569         sk->sk_socket   = osk->sk_socket;
570         sk->sk_priority = osk->sk_priority;
571         sk->sk_protocol = osk->sk_protocol;
572         sk->sk_rcvbuf   = osk->sk_rcvbuf;
573         sk->sk_sndbuf   = osk->sk_sndbuf;
574         sk->sk_state    = TCP_ESTABLISHED;
575         sk->sk_sleep    = osk->sk_sleep;
576         sock_copy_flags(sk, osk);
577
578         init_timer(&rose->timer);
579         init_timer(&rose->idletimer);
580
581         orose           = rose_sk(osk);
582         rose->t1        = orose->t1;
583         rose->t2        = orose->t2;
584         rose->t3        = orose->t3;
585         rose->hb        = orose->hb;
586         rose->idle      = orose->idle;
587         rose->defer     = orose->defer;
588         rose->device    = orose->device;
589         rose->qbitincl  = orose->qbitincl;
590
591         return sk;
592 }
593
594 static int rose_release(struct socket *sock)
595 {
596         struct sock *sk = sock->sk;
597         struct rose_sock *rose;
598
599         if (sk == NULL) return 0;
600
601         rose = rose_sk(sk);
602
603         switch (rose->state) {
604         case ROSE_STATE_0:
605                 rose_disconnect(sk, 0, -1, -1);
606                 rose_destroy_socket(sk);
607                 break;
608
609         case ROSE_STATE_2:
610                 rose->neighbour->use--;
611                 rose_disconnect(sk, 0, -1, -1);
612                 rose_destroy_socket(sk);
613                 break;
614
615         case ROSE_STATE_1:
616         case ROSE_STATE_3:
617         case ROSE_STATE_4:
618         case ROSE_STATE_5:
619                 rose_clear_queues(sk);
620                 rose_stop_idletimer(sk);
621                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
622                 rose_start_t3timer(sk);
623                 rose->state  = ROSE_STATE_2;
624                 sk->sk_state    = TCP_CLOSE;
625                 sk->sk_shutdown |= SEND_SHUTDOWN;
626                 sk->sk_state_change(sk);
627                 sock_set_flag(sk, SOCK_DEAD);
628                 sock_set_flag(sk, SOCK_DESTROY);
629                 break;
630
631         default:
632                 break;
633         }
634
635         sock->sk = NULL;
636
637         return 0;
638 }
639
640 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
641 {
642         struct sock *sk = sock->sk;
643         struct rose_sock *rose = rose_sk(sk);
644         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
645         struct net_device *dev;
646         ax25_address *source;
647         ax25_uid_assoc *user;
648         int n;
649
650         if (!sock_flag(sk, SOCK_ZAPPED))
651                 return -EINVAL;
652
653         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
654                 return -EINVAL;
655
656         if (addr->srose_family != AF_ROSE)
657                 return -EINVAL;
658
659         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
660                 return -EINVAL;
661
662         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
663                 return -EINVAL;
664
665         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
666                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
667                 return -EADDRNOTAVAIL;
668         }
669
670         source = &addr->srose_call;
671
672         user = ax25_findbyuid(current->euid);
673         if (user) {
674                 rose->source_call = user->call;
675                 ax25_uid_put(user);
676         } else {
677                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
678                         return -EACCES;
679                 rose->source_call   = *source;
680         }
681
682         rose->source_addr   = addr->srose_addr;
683         rose->device        = dev;
684         rose->source_ndigis = addr->srose_ndigis;
685
686         if (addr_len == sizeof(struct full_sockaddr_rose)) {
687                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
688                 for (n = 0 ; n < addr->srose_ndigis ; n++)
689                         rose->source_digis[n] = full_addr->srose_digis[n];
690         } else {
691                 if (rose->source_ndigis == 1) {
692                         rose->source_digis[0] = addr->srose_digi;
693                 }
694         }
695
696         rose_insert_socket(sk);
697
698         sock_reset_flag(sk, SOCK_ZAPPED);
699         SOCK_DEBUG(sk, "ROSE: socket is bound\n");
700         return 0;
701 }
702
703 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
704 {
705         struct sock *sk = sock->sk;
706         struct rose_sock *rose = rose_sk(sk);
707         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
708         unsigned char cause, diagnostic;
709         struct net_device *dev;
710         ax25_uid_assoc *user;
711         int n, err = 0;
712
713         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
714                 return -EINVAL;
715
716         if (addr->srose_family != AF_ROSE)
717                 return -EINVAL;
718
719         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
720                 return -EINVAL;
721
722         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
723                 return -EINVAL;
724
725         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
726         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
727                 return -EINVAL;
728
729         lock_sock(sk);
730
731         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
732                 /* Connect completed during a ERESTARTSYS event */
733                 sock->state = SS_CONNECTED;
734                 goto out_release;
735         }
736
737         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
738                 sock->state = SS_UNCONNECTED;
739                 err = -ECONNREFUSED;
740                 goto out_release;
741         }
742
743         if (sk->sk_state == TCP_ESTABLISHED) {
744                 /* No reconnect on a seqpacket socket */
745                 err = -EISCONN;
746                 goto out_release;
747         }
748
749         sk->sk_state   = TCP_CLOSE;
750         sock->state = SS_UNCONNECTED;
751
752         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
753                                          &diagnostic);
754         if (!rose->neighbour)
755                 return -ENETUNREACH;
756
757         rose->lci = rose_new_lci(rose->neighbour);
758         if (!rose->lci) {
759                 err = -ENETUNREACH;
760                 goto out_release;
761         }
762
763         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
764                 sock_reset_flag(sk, SOCK_ZAPPED);
765
766                 if ((dev = rose_dev_first()) == NULL) {
767                         err = -ENETUNREACH;
768                         goto out_release;
769                 }
770
771                 user = ax25_findbyuid(current->euid);
772                 if (!user) {
773                         err = -EINVAL;
774                         goto out_release;
775                 }
776
777                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
778                 rose->source_call = user->call;
779                 rose->device      = dev;
780                 ax25_uid_put(user);
781
782                 rose_insert_socket(sk);         /* Finish the bind */
783         }
784 rose_try_next_neigh:
785         rose->dest_addr   = addr->srose_addr;
786         rose->dest_call   = addr->srose_call;
787         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
788         rose->dest_ndigis = addr->srose_ndigis;
789
790         if (addr_len == sizeof(struct full_sockaddr_rose)) {
791                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
792                 for (n = 0 ; n < addr->srose_ndigis ; n++)
793                         rose->dest_digis[n] = full_addr->srose_digis[n];
794         } else {
795                 if (rose->dest_ndigis == 1) {
796                         rose->dest_digis[0] = addr->srose_digi;
797                 }
798         }
799
800         /* Move to connecting socket, start sending Connect Requests */
801         sock->state   = SS_CONNECTING;
802         sk->sk_state     = TCP_SYN_SENT;
803
804         rose->state = ROSE_STATE_1;
805
806         rose->neighbour->use++;
807
808         rose_write_internal(sk, ROSE_CALL_REQUEST);
809         rose_start_heartbeat(sk);
810         rose_start_t1timer(sk);
811
812         /* Now the loop */
813         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
814                 err = -EINPROGRESS;
815                 goto out_release;
816         }
817
818         /*
819          * A Connect Ack with Choke or timeout or failed routing will go to
820          * closed.
821          */
822         if (sk->sk_state == TCP_SYN_SENT) {
823                 DEFINE_WAIT(wait);
824
825                 for (;;) {
826                         prepare_to_wait(sk->sk_sleep, &wait,
827                                         TASK_INTERRUPTIBLE);
828                         if (sk->sk_state != TCP_SYN_SENT)
829                                 break;
830                         if (!signal_pending(current)) {
831                                 release_sock(sk);
832                                 schedule();
833                                 lock_sock(sk);
834                                 continue;
835                         }
836                         err = -ERESTARTSYS;
837                         break;
838                 }
839                 finish_wait(sk->sk_sleep, &wait);
840
841                 if (err)
842                         goto out_release;
843         }
844
845         if (sk->sk_state != TCP_ESTABLISHED) {
846         /* Try next neighbour */
847                 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic);
848                 if (rose->neighbour)
849                         goto rose_try_next_neigh;
850
851                 /* No more neighbours */
852                 sock->state = SS_UNCONNECTED;
853                 err = sock_error(sk);   /* Always set at this point */
854                 goto out_release;
855         }
856
857         sock->state = SS_CONNECTED;
858
859 out_release:
860         release_sock(sk);
861
862         return err;
863 }
864
865 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
866 {
867         struct sk_buff *skb;
868         struct sock *newsk;
869         DEFINE_WAIT(wait);
870         struct sock *sk;
871         int err = 0;
872
873         if ((sk = sock->sk) == NULL)
874                 return -EINVAL;
875
876         lock_sock(sk);
877         if (sk->sk_type != SOCK_SEQPACKET) {
878                 err = -EOPNOTSUPP;
879                 goto out_release;
880         }
881
882         if (sk->sk_state != TCP_LISTEN) {
883                 err = -EINVAL;
884                 goto out_release;
885         }
886
887         /*
888          *      The write queue this time is holding sockets ready to use
889          *      hooked into the SABM we saved
890          */
891         for (;;) {
892                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
893
894                 skb = skb_dequeue(&sk->sk_receive_queue);
895                 if (skb)
896                         break;
897
898                 if (flags & O_NONBLOCK) {
899                         err = -EWOULDBLOCK;
900                         break;
901                 }
902                 if (!signal_pending(current)) {
903                         release_sock(sk);
904                         schedule();
905                         lock_sock(sk);
906                         continue;
907                 }
908                 err = -ERESTARTSYS;
909                 break;
910         }
911         finish_wait(sk->sk_sleep, &wait);
912         if (err)
913                 goto out_release;
914
915         newsk = skb->sk;
916         newsk->sk_socket = newsock;
917         newsk->sk_sleep = &newsock->wait;
918
919         /* Now attach up the new socket */
920         skb->sk = NULL;
921         kfree_skb(skb);
922         sk->sk_ack_backlog--;
923         newsock->sk = newsk;
924
925 out_release:
926         release_sock(sk);
927
928         return err;
929 }
930
931 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
932         int *uaddr_len, int peer)
933 {
934         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
935         struct sock *sk = sock->sk;
936         struct rose_sock *rose = rose_sk(sk);
937         int n;
938
939         if (peer != 0) {
940                 if (sk->sk_state != TCP_ESTABLISHED)
941                         return -ENOTCONN;
942                 srose->srose_family = AF_ROSE;
943                 srose->srose_addr   = rose->dest_addr;
944                 srose->srose_call   = rose->dest_call;
945                 srose->srose_ndigis = rose->dest_ndigis;
946                 for (n = 0; n < rose->dest_ndigis; n++)
947                         srose->srose_digis[n] = rose->dest_digis[n];
948         } else {
949                 srose->srose_family = AF_ROSE;
950                 srose->srose_addr   = rose->source_addr;
951                 srose->srose_call   = rose->source_call;
952                 srose->srose_ndigis = rose->source_ndigis;
953                 for (n = 0; n < rose->source_ndigis; n++)
954                         srose->srose_digis[n] = rose->source_digis[n];
955         }
956
957         *uaddr_len = sizeof(struct full_sockaddr_rose);
958         return 0;
959 }
960
961 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
962 {
963         struct sock *sk;
964         struct sock *make;
965         struct rose_sock *make_rose;
966         struct rose_facilities_struct facilities;
967         int n, len;
968
969         skb->sk = NULL;         /* Initially we don't know who it's for */
970
971         /*
972          *      skb->data points to the rose frame start
973          */
974         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
975
976         len  = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
977         len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
978         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
979                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
980                 return 0;
981         }
982
983         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
984
985         /*
986          * We can't accept the Call Request.
987          */
988         if (sk == NULL || sk_acceptq_is_full(sk) ||
989             (make = rose_make_new(sk)) == NULL) {
990                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
991                 return 0;
992         }
993
994         skb->sk     = make;
995         make->sk_state = TCP_ESTABLISHED;
996         make_rose = rose_sk(make);
997
998         make_rose->lci           = lci;
999         make_rose->dest_addr     = facilities.dest_addr;
1000         make_rose->dest_call     = facilities.dest_call;
1001         make_rose->dest_ndigis   = facilities.dest_ndigis;
1002         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1003                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1004         make_rose->source_addr   = facilities.source_addr;
1005         make_rose->source_call   = facilities.source_call;
1006         make_rose->source_ndigis = facilities.source_ndigis;
1007         for (n = 0 ; n < facilities.source_ndigis ; n++)
1008                 make_rose->source_digis[n]= facilities.source_digis[n];
1009         make_rose->neighbour     = neigh;
1010         make_rose->device        = dev;
1011         make_rose->facilities    = facilities;
1012
1013         make_rose->neighbour->use++;
1014
1015         if (rose_sk(sk)->defer) {
1016                 make_rose->state = ROSE_STATE_5;
1017         } else {
1018                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1019                 make_rose->state = ROSE_STATE_3;
1020                 rose_start_idletimer(make);
1021         }
1022
1023         make_rose->condition = 0x00;
1024         make_rose->vs        = 0;
1025         make_rose->va        = 0;
1026         make_rose->vr        = 0;
1027         make_rose->vl        = 0;
1028         sk->sk_ack_backlog++;
1029
1030         rose_insert_socket(make);
1031
1032         skb_queue_head(&sk->sk_receive_queue, skb);
1033
1034         rose_start_heartbeat(make);
1035
1036         if (!sock_flag(sk, SOCK_DEAD))
1037                 sk->sk_data_ready(sk, skb->len);
1038
1039         return 1;
1040 }
1041
1042 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1043                         struct msghdr *msg, size_t len)
1044 {
1045         struct sock *sk = sock->sk;
1046         struct rose_sock *rose = rose_sk(sk);
1047         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1048         int err;
1049         struct full_sockaddr_rose srose;
1050         struct sk_buff *skb;
1051         unsigned char *asmptr;
1052         int n, size, qbit = 0;
1053
1054         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1055                 return -EINVAL;
1056
1057         if (sock_flag(sk, SOCK_ZAPPED))
1058                 return -EADDRNOTAVAIL;
1059
1060         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1061                 send_sig(SIGPIPE, current, 0);
1062                 return -EPIPE;
1063         }
1064
1065         if (rose->neighbour == NULL || rose->device == NULL)
1066                 return -ENETUNREACH;
1067
1068         if (usrose != NULL) {
1069                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1070                         return -EINVAL;
1071                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1072                 memcpy(&srose, usrose, msg->msg_namelen);
1073                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1074                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1075                         return -EISCONN;
1076                 if (srose.srose_ndigis != rose->dest_ndigis)
1077                         return -EISCONN;
1078                 if (srose.srose_ndigis == rose->dest_ndigis) {
1079                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1080                                 if (ax25cmp(&rose->dest_digis[n],
1081                                             &srose.srose_digis[n]))
1082                                         return -EISCONN;
1083                 }
1084                 if (srose.srose_family != AF_ROSE)
1085                         return -EINVAL;
1086         } else {
1087                 if (sk->sk_state != TCP_ESTABLISHED)
1088                         return -ENOTCONN;
1089
1090                 srose.srose_family = AF_ROSE;
1091                 srose.srose_addr   = rose->dest_addr;
1092                 srose.srose_call   = rose->dest_call;
1093                 srose.srose_ndigis = rose->dest_ndigis;
1094                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1095                         srose.srose_digis[n] = rose->dest_digis[n];
1096         }
1097
1098         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1099
1100         /* Build a packet */
1101         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1102         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1103
1104         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1105                 return err;
1106
1107         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1108
1109         /*
1110          *      Put the data on the end
1111          */
1112         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1113
1114         skb_reset_transport_header(skb);
1115         skb_put(skb, len);
1116
1117         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1118         if (err) {
1119                 kfree_skb(skb);
1120                 return err;
1121         }
1122
1123         /*
1124          *      If the Q BIT Include socket option is in force, the first
1125          *      byte of the user data is the logical value of the Q Bit.
1126          */
1127         if (rose->qbitincl) {
1128                 qbit = skb->data[0];
1129                 skb_pull(skb, 1);
1130         }
1131
1132         /*
1133          *      Push down the ROSE header
1134          */
1135         asmptr = skb_push(skb, ROSE_MIN_LEN);
1136
1137         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1138
1139         /* Build a ROSE Network header */
1140         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1141         asmptr[1] = (rose->lci >> 0) & 0xFF;
1142         asmptr[2] = ROSE_DATA;
1143
1144         if (qbit)
1145                 asmptr[0] |= ROSE_Q_BIT;
1146
1147         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1148
1149         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1150
1151         if (sk->sk_state != TCP_ESTABLISHED) {
1152                 kfree_skb(skb);
1153                 return -ENOTCONN;
1154         }
1155
1156 #ifdef M_BIT
1157 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1158         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1159                 unsigned char header[ROSE_MIN_LEN];
1160                 struct sk_buff *skbn;
1161                 int frontlen;
1162                 int lg;
1163
1164                 /* Save a copy of the Header */
1165                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1166                 skb_pull(skb, ROSE_MIN_LEN);
1167
1168                 frontlen = skb_headroom(skb);
1169
1170                 while (skb->len > 0) {
1171                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1172                                 kfree_skb(skb);
1173                                 return err;
1174                         }
1175
1176                         skbn->sk   = sk;
1177                         skbn->free = 1;
1178                         skbn->arp  = 1;
1179
1180                         skb_reserve(skbn, frontlen);
1181
1182                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1183
1184                         /* Copy the user data */
1185                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1186                         skb_pull(skb, lg);
1187
1188                         /* Duplicate the Header */
1189                         skb_push(skbn, ROSE_MIN_LEN);
1190                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1191
1192                         if (skb->len > 0)
1193                                 skbn->data[2] |= M_BIT;
1194
1195                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1196                 }
1197
1198                 skb->free = 1;
1199                 kfree_skb(skb);
1200         } else {
1201                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1202         }
1203 #else
1204         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1205 #endif
1206
1207         rose_kick(sk);
1208
1209         return len;
1210 }
1211
1212
1213 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1214                         struct msghdr *msg, size_t size, int flags)
1215 {
1216         struct sock *sk = sock->sk;
1217         struct rose_sock *rose = rose_sk(sk);
1218         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1219         size_t copied;
1220         unsigned char *asmptr;
1221         struct sk_buff *skb;
1222         int n, er, qbit;
1223
1224         /*
1225          * This works for seqpacket too. The receiver has ordered the queue for
1226          * us! We do one quick check first though
1227          */
1228         if (sk->sk_state != TCP_ESTABLISHED)
1229                 return -ENOTCONN;
1230
1231         /* Now we can treat all alike */
1232         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1233                 return er;
1234
1235         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1236
1237         skb_pull(skb, ROSE_MIN_LEN);
1238
1239         if (rose->qbitincl) {
1240                 asmptr  = skb_push(skb, 1);
1241                 *asmptr = qbit;
1242         }
1243
1244         skb_reset_transport_header(skb);
1245         copied     = skb->len;
1246
1247         if (copied > size) {
1248                 copied = size;
1249                 msg->msg_flags |= MSG_TRUNC;
1250         }
1251
1252         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1253
1254         if (srose != NULL) {
1255                 srose->srose_family = AF_ROSE;
1256                 srose->srose_addr   = rose->dest_addr;
1257                 srose->srose_call   = rose->dest_call;
1258                 srose->srose_ndigis = rose->dest_ndigis;
1259                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1260                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1261                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1262                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1263                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1264                 } else {
1265                         if (rose->dest_ndigis >= 1) {
1266                                 srose->srose_ndigis = 1;
1267                                 srose->srose_digi = rose->dest_digis[0];
1268                         }
1269                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1270                 }
1271         }
1272
1273         skb_free_datagram(sk, skb);
1274
1275         return copied;
1276 }
1277
1278
1279 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1280 {
1281         struct sock *sk = sock->sk;
1282         struct rose_sock *rose = rose_sk(sk);
1283         void __user *argp = (void __user *)arg;
1284
1285         switch (cmd) {
1286         case TIOCOUTQ: {
1287                 long amount;
1288                 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1289                 if (amount < 0)
1290                         amount = 0;
1291                 return put_user(amount, (unsigned int __user *) argp);
1292         }
1293
1294         case TIOCINQ: {
1295                 struct sk_buff *skb;
1296                 long amount = 0L;
1297                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1298                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1299                         amount = skb->len;
1300                 return put_user(amount, (unsigned int __user *) argp);
1301         }
1302
1303         case SIOCGSTAMP:
1304                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1305
1306         case SIOCGSTAMPNS:
1307                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1308
1309         case SIOCGIFADDR:
1310         case SIOCSIFADDR:
1311         case SIOCGIFDSTADDR:
1312         case SIOCSIFDSTADDR:
1313         case SIOCGIFBRDADDR:
1314         case SIOCSIFBRDADDR:
1315         case SIOCGIFNETMASK:
1316         case SIOCSIFNETMASK:
1317         case SIOCGIFMETRIC:
1318         case SIOCSIFMETRIC:
1319                 return -EINVAL;
1320
1321         case SIOCADDRT:
1322         case SIOCDELRT:
1323         case SIOCRSCLRRT:
1324                 if (!capable(CAP_NET_ADMIN))
1325                         return -EPERM;
1326                 return rose_rt_ioctl(cmd, argp);
1327
1328         case SIOCRSGCAUSE: {
1329                 struct rose_cause_struct rose_cause;
1330                 rose_cause.cause      = rose->cause;
1331                 rose_cause.diagnostic = rose->diagnostic;
1332                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1333         }
1334
1335         case SIOCRSSCAUSE: {
1336                 struct rose_cause_struct rose_cause;
1337                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1338                         return -EFAULT;
1339                 rose->cause      = rose_cause.cause;
1340                 rose->diagnostic = rose_cause.diagnostic;
1341                 return 0;
1342         }
1343
1344         case SIOCRSSL2CALL:
1345                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1346                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1347                         ax25_listen_release(&rose_callsign, NULL);
1348                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1349                         return -EFAULT;
1350                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1351                         return ax25_listen_register(&rose_callsign, NULL);
1352
1353                 return 0;
1354
1355         case SIOCRSGL2CALL:
1356                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1357
1358         case SIOCRSACCEPT:
1359                 if (rose->state == ROSE_STATE_5) {
1360                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1361                         rose_start_idletimer(sk);
1362                         rose->condition = 0x00;
1363                         rose->vs        = 0;
1364                         rose->va        = 0;
1365                         rose->vr        = 0;
1366                         rose->vl        = 0;
1367                         rose->state     = ROSE_STATE_3;
1368                 }
1369                 return 0;
1370
1371         default:
1372                 return -ENOIOCTLCMD;
1373         }
1374
1375         return 0;
1376 }
1377
1378 #ifdef CONFIG_PROC_FS
1379 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1380         __acquires(rose_list_lock)
1381 {
1382         int i;
1383         struct sock *s;
1384         struct hlist_node *node;
1385
1386         spin_lock_bh(&rose_list_lock);
1387         if (*pos == 0)
1388                 return SEQ_START_TOKEN;
1389
1390         i = 1;
1391         sk_for_each(s, node, &rose_list) {
1392                 if (i == *pos)
1393                         return s;
1394                 ++i;
1395         }
1396         return NULL;
1397 }
1398
1399 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1400 {
1401         ++*pos;
1402
1403         return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1404                 : sk_next((struct sock *)v);
1405 }
1406
1407 static void rose_info_stop(struct seq_file *seq, void *v)
1408         __releases(rose_list_lock)
1409 {
1410         spin_unlock_bh(&rose_list_lock);
1411 }
1412
1413 static int rose_info_show(struct seq_file *seq, void *v)
1414 {
1415         char buf[11];
1416
1417         if (v == SEQ_START_TOKEN)
1418                 seq_puts(seq,
1419                          "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");
1420
1421         else {
1422                 struct sock *s = v;
1423                 struct rose_sock *rose = rose_sk(s);
1424                 const char *devname, *callsign;
1425                 const struct net_device *dev = rose->device;
1426
1427                 if (!dev)
1428                         devname = "???";
1429                 else
1430                         devname = dev->name;
1431
1432                 seq_printf(seq, "%-10s %-9s ",
1433                         rose2asc(&rose->dest_addr),
1434                         ax2asc(buf, &rose->dest_call));
1435
1436                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1437                         callsign = "??????-?";
1438                 else
1439                         callsign = ax2asc(buf, &rose->source_call);
1440
1441                 seq_printf(seq,
1442                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1443                         rose2asc(&rose->source_addr),
1444                         callsign,
1445                         devname,
1446                         rose->lci & 0x0FFF,
1447                         (rose->neighbour) ? rose->neighbour->number : 0,
1448                         rose->state,
1449                         rose->vs,
1450                         rose->vr,
1451                         rose->va,
1452                         ax25_display_timer(&rose->timer) / HZ,
1453                         rose->t1 / HZ,
1454                         rose->t2 / HZ,
1455                         rose->t3 / HZ,
1456                         rose->hb / HZ,
1457                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1458                         rose->idle / (60 * HZ),
1459                         atomic_read(&s->sk_wmem_alloc),
1460                         atomic_read(&s->sk_rmem_alloc),
1461                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1462         }
1463
1464         return 0;
1465 }
1466
1467 static const struct seq_operations rose_info_seqops = {
1468         .start = rose_info_start,
1469         .next = rose_info_next,
1470         .stop = rose_info_stop,
1471         .show = rose_info_show,
1472 };
1473
1474 static int rose_info_open(struct inode *inode, struct file *file)
1475 {
1476         return seq_open(file, &rose_info_seqops);
1477 }
1478
1479 static const struct file_operations rose_info_fops = {
1480         .owner = THIS_MODULE,
1481         .open = rose_info_open,
1482         .read = seq_read,
1483         .llseek = seq_lseek,
1484         .release = seq_release,
1485 };
1486 #endif  /* CONFIG_PROC_FS */
1487
1488 static struct net_proto_family rose_family_ops = {
1489         .family         =       PF_ROSE,
1490         .create         =       rose_create,
1491         .owner          =       THIS_MODULE,
1492 };
1493
1494 static struct proto_ops rose_proto_ops = {
1495         .family         =       PF_ROSE,
1496         .owner          =       THIS_MODULE,
1497         .release        =       rose_release,
1498         .bind           =       rose_bind,
1499         .connect        =       rose_connect,
1500         .socketpair     =       sock_no_socketpair,
1501         .accept         =       rose_accept,
1502         .getname        =       rose_getname,
1503         .poll           =       datagram_poll,
1504         .ioctl          =       rose_ioctl,
1505         .listen         =       rose_listen,
1506         .shutdown       =       sock_no_shutdown,
1507         .setsockopt     =       rose_setsockopt,
1508         .getsockopt     =       rose_getsockopt,
1509         .sendmsg        =       rose_sendmsg,
1510         .recvmsg        =       rose_recvmsg,
1511         .mmap           =       sock_no_mmap,
1512         .sendpage       =       sock_no_sendpage,
1513 };
1514
1515 static struct notifier_block rose_dev_notifier = {
1516         .notifier_call  =       rose_device_event,
1517 };
1518
1519 static struct net_device **dev_rose;
1520
1521 static struct ax25_protocol rose_pid = {
1522         .pid    = AX25_P_ROSE,
1523         .func   = rose_route_frame
1524 };
1525
1526 static struct ax25_linkfail rose_linkfail_notifier = {
1527         .func   = rose_link_failed
1528 };
1529
1530 static int __init rose_proto_init(void)
1531 {
1532         int i;
1533         int rc;
1534
1535         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1536                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1537                 rc = -EINVAL;
1538                 goto out;
1539         }
1540
1541         rc = proto_register(&rose_proto, 0);
1542         if (rc != 0)
1543                 goto out;
1544
1545         rose_callsign = null_ax25_address;
1546
1547         dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1548         if (dev_rose == NULL) {
1549                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1550                 rc = -ENOMEM;
1551                 goto out_proto_unregister;
1552         }
1553
1554         for (i = 0; i < rose_ndevs; i++) {
1555                 struct net_device *dev;
1556                 char name[IFNAMSIZ];
1557
1558                 sprintf(name, "rose%d", i);
1559                 dev = alloc_netdev(sizeof(struct net_device_stats),
1560                                    name, rose_setup);
1561                 if (!dev) {
1562                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1563                         rc = -ENOMEM;
1564                         goto fail;
1565                 }
1566                 rc = register_netdev(dev);
1567                 if (rc) {
1568                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1569                         free_netdev(dev);
1570                         goto fail;
1571                 }
1572                 lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key);
1573                 dev_rose[i] = dev;
1574         }
1575
1576         sock_register(&rose_family_ops);
1577         register_netdevice_notifier(&rose_dev_notifier);
1578
1579         ax25_register_pid(&rose_pid);
1580         ax25_linkfail_register(&rose_linkfail_notifier);
1581
1582 #ifdef CONFIG_SYSCTL
1583         rose_register_sysctl();
1584 #endif
1585         rose_loopback_init();
1586
1587         rose_add_loopback_neigh();
1588
1589         proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1590         proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1591         proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1592         proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1593 out:
1594         return rc;
1595 fail:
1596         while (--i >= 0) {
1597                 unregister_netdev(dev_rose[i]);
1598                 free_netdev(dev_rose[i]);
1599         }
1600         kfree(dev_rose);
1601 out_proto_unregister:
1602         proto_unregister(&rose_proto);
1603         goto out;
1604 }
1605 module_init(rose_proto_init);
1606
1607 module_param(rose_ndevs, int, 0);
1608 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1609
1610 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1611 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1612 MODULE_LICENSE("GPL");
1613 MODULE_ALIAS_NETPROTO(PF_ROSE);
1614
1615 static void __exit rose_exit(void)
1616 {
1617         int i;
1618
1619         proc_net_remove(&init_net, "rose");
1620         proc_net_remove(&init_net, "rose_neigh");
1621         proc_net_remove(&init_net, "rose_nodes");
1622         proc_net_remove(&init_net, "rose_routes");
1623         rose_loopback_clear();
1624
1625         rose_rt_free();
1626
1627         ax25_protocol_release(AX25_P_ROSE);
1628         ax25_linkfail_release(&rose_linkfail_notifier);
1629
1630         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1631                 ax25_listen_release(&rose_callsign, NULL);
1632
1633 #ifdef CONFIG_SYSCTL
1634         rose_unregister_sysctl();
1635 #endif
1636         unregister_netdevice_notifier(&rose_dev_notifier);
1637
1638         sock_unregister(PF_ROSE);
1639
1640         for (i = 0; i < rose_ndevs; i++) {
1641                 struct net_device *dev = dev_rose[i];
1642
1643                 if (dev) {
1644                         unregister_netdev(dev);
1645                         free_netdev(dev);
1646                 }
1647         }
1648
1649         kfree(dev_rose);
1650         proto_unregister(&rose_proto);
1651 }
1652
1653 module_exit(rose_exit);