hci_usb: remove code obfuscation
[sfrench/cifs-2.6.git] / net / rose / af_rose.c
1 /*
2  * This program is free software; you can redistribute it and/or modify
3  * it under the terms of the GNU General Public License as published by
4  * the Free Software Foundation; either version 2 of the License, or
5  * (at your option) any later version.
6  *
7  * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
8  * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
9  * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
10  * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
11  */
12
13 #include <linux/capability.h>
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/init.h>
17 #include <linux/errno.h>
18 #include <linux/types.h>
19 #include <linux/socket.h>
20 #include <linux/in.h>
21 #include <linux/kernel.h>
22 #include <linux/sched.h>
23 #include <linux/spinlock.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/stat.h>
29 #include <net/net_namespace.h>
30 #include <net/ax25.h>
31 #include <linux/inet.h>
32 #include <linux/netdevice.h>
33 #include <linux/if_arp.h>
34 #include <linux/skbuff.h>
35 #include <net/sock.h>
36 #include <asm/system.h>
37 #include <asm/uaccess.h>
38 #include <linux/fcntl.h>
39 #include <linux/termios.h>
40 #include <linux/mm.h>
41 #include <linux/interrupt.h>
42 #include <linux/notifier.h>
43 #include <net/rose.h>
44 #include <linux/proc_fs.h>
45 #include <linux/seq_file.h>
46 #include <net/tcp_states.h>
47 #include <net/ip.h>
48 #include <net/arp.h>
49
50 static int rose_ndevs = 10;
51
52 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
53 int sysctl_rose_call_request_timeout    = ROSE_DEFAULT_T1;
54 int sysctl_rose_reset_request_timeout   = ROSE_DEFAULT_T2;
55 int sysctl_rose_clear_request_timeout   = ROSE_DEFAULT_T3;
56 int sysctl_rose_no_activity_timeout     = ROSE_DEFAULT_IDLE;
57 int sysctl_rose_ack_hold_back_timeout   = ROSE_DEFAULT_HB;
58 int sysctl_rose_routing_control         = ROSE_DEFAULT_ROUTING;
59 int sysctl_rose_link_fail_timeout       = ROSE_DEFAULT_FAIL_TIMEOUT;
60 int sysctl_rose_maximum_vcs             = ROSE_DEFAULT_MAXVC;
61 int sysctl_rose_window_size             = ROSE_DEFAULT_WINDOW_SIZE;
62
63 static HLIST_HEAD(rose_list);
64 static DEFINE_SPINLOCK(rose_list_lock);
65
66 static struct proto_ops rose_proto_ops;
67
68 ax25_address rose_callsign;
69
70 /*
71  * ROSE network devices are virtual network devices encapsulating ROSE
72  * frames into AX.25 which will be sent through an AX.25 device, so form a
73  * special "super class" of normal net devices; split their locks off into a
74  * separate class since they always nest.
75  */
76 static struct lock_class_key rose_netdev_xmit_lock_key;
77
78 /*
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_net(dev) != &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(sock_net(osk), 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         sock_hold(sk);
602         sock_orphan(sk);
603         lock_sock(sk);
604         rose = rose_sk(sk);
605
606         switch (rose->state) {
607         case ROSE_STATE_0:
608                 release_sock(sk);
609                 rose_disconnect(sk, 0, -1, -1);
610                 lock_sock(sk);
611                 rose_destroy_socket(sk);
612                 break;
613
614         case ROSE_STATE_2:
615                 rose->neighbour->use--;
616                 release_sock(sk);
617                 rose_disconnect(sk, 0, -1, -1);
618                 lock_sock(sk);
619                 rose_destroy_socket(sk);
620                 break;
621
622         case ROSE_STATE_1:
623         case ROSE_STATE_3:
624         case ROSE_STATE_4:
625         case ROSE_STATE_5:
626                 rose_clear_queues(sk);
627                 rose_stop_idletimer(sk);
628                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
629                 rose_start_t3timer(sk);
630                 rose->state  = ROSE_STATE_2;
631                 sk->sk_state    = TCP_CLOSE;
632                 sk->sk_shutdown |= SEND_SHUTDOWN;
633                 sk->sk_state_change(sk);
634                 sock_set_flag(sk, SOCK_DEAD);
635                 sock_set_flag(sk, SOCK_DESTROY);
636                 break;
637
638         default:
639                 break;
640         }
641
642         sock->sk = NULL;
643         release_sock(sk);
644         sock_put(sk);
645
646         return 0;
647 }
648
649 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
650 {
651         struct sock *sk = sock->sk;
652         struct rose_sock *rose = rose_sk(sk);
653         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
654         struct net_device *dev;
655         ax25_address *source;
656         ax25_uid_assoc *user;
657         int n;
658
659         if (!sock_flag(sk, SOCK_ZAPPED))
660                 return -EINVAL;
661
662         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
663                 return -EINVAL;
664
665         if (addr->srose_family != AF_ROSE)
666                 return -EINVAL;
667
668         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
669                 return -EINVAL;
670
671         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
672                 return -EINVAL;
673
674         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
675                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
676                 return -EADDRNOTAVAIL;
677         }
678
679         source = &addr->srose_call;
680
681         user = ax25_findbyuid(current->euid);
682         if (user) {
683                 rose->source_call = user->call;
684                 ax25_uid_put(user);
685         } else {
686                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
687                         return -EACCES;
688                 rose->source_call   = *source;
689         }
690
691         rose->source_addr   = addr->srose_addr;
692         rose->device        = dev;
693         rose->source_ndigis = addr->srose_ndigis;
694
695         if (addr_len == sizeof(struct full_sockaddr_rose)) {
696                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
697                 for (n = 0 ; n < addr->srose_ndigis ; n++)
698                         rose->source_digis[n] = full_addr->srose_digis[n];
699         } else {
700                 if (rose->source_ndigis == 1) {
701                         rose->source_digis[0] = addr->srose_digi;
702                 }
703         }
704
705         rose_insert_socket(sk);
706
707         sock_reset_flag(sk, SOCK_ZAPPED);
708         SOCK_DEBUG(sk, "ROSE: socket is bound\n");
709         return 0;
710 }
711
712 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
713 {
714         struct sock *sk = sock->sk;
715         struct rose_sock *rose = rose_sk(sk);
716         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
717         unsigned char cause, diagnostic;
718         struct net_device *dev;
719         ax25_uid_assoc *user;
720         int n, err = 0;
721
722         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
723                 return -EINVAL;
724
725         if (addr->srose_family != AF_ROSE)
726                 return -EINVAL;
727
728         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
729                 return -EINVAL;
730
731         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
732                 return -EINVAL;
733
734         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
735         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
736                 return -EINVAL;
737
738         lock_sock(sk);
739
740         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
741                 /* Connect completed during a ERESTARTSYS event */
742                 sock->state = SS_CONNECTED;
743                 goto out_release;
744         }
745
746         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
747                 sock->state = SS_UNCONNECTED;
748                 err = -ECONNREFUSED;
749                 goto out_release;
750         }
751
752         if (sk->sk_state == TCP_ESTABLISHED) {
753                 /* No reconnect on a seqpacket socket */
754                 err = -EISCONN;
755                 goto out_release;
756         }
757
758         sk->sk_state   = TCP_CLOSE;
759         sock->state = SS_UNCONNECTED;
760
761         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
762                                          &diagnostic);
763         if (!rose->neighbour)
764                 return -ENETUNREACH;
765
766         rose->lci = rose_new_lci(rose->neighbour);
767         if (!rose->lci) {
768                 err = -ENETUNREACH;
769                 goto out_release;
770         }
771
772         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
773                 sock_reset_flag(sk, SOCK_ZAPPED);
774
775                 if ((dev = rose_dev_first()) == NULL) {
776                         err = -ENETUNREACH;
777                         goto out_release;
778                 }
779
780                 user = ax25_findbyuid(current->euid);
781                 if (!user) {
782                         err = -EINVAL;
783                         goto out_release;
784                 }
785
786                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
787                 rose->source_call = user->call;
788                 rose->device      = dev;
789                 ax25_uid_put(user);
790
791                 rose_insert_socket(sk);         /* Finish the bind */
792         }
793 rose_try_next_neigh:
794         rose->dest_addr   = addr->srose_addr;
795         rose->dest_call   = addr->srose_call;
796         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
797         rose->dest_ndigis = addr->srose_ndigis;
798
799         if (addr_len == sizeof(struct full_sockaddr_rose)) {
800                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
801                 for (n = 0 ; n < addr->srose_ndigis ; n++)
802                         rose->dest_digis[n] = full_addr->srose_digis[n];
803         } else {
804                 if (rose->dest_ndigis == 1) {
805                         rose->dest_digis[0] = addr->srose_digi;
806                 }
807         }
808
809         /* Move to connecting socket, start sending Connect Requests */
810         sock->state   = SS_CONNECTING;
811         sk->sk_state     = TCP_SYN_SENT;
812
813         rose->state = ROSE_STATE_1;
814
815         rose->neighbour->use++;
816
817         rose_write_internal(sk, ROSE_CALL_REQUEST);
818         rose_start_heartbeat(sk);
819         rose_start_t1timer(sk);
820
821         /* Now the loop */
822         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
823                 err = -EINPROGRESS;
824                 goto out_release;
825         }
826
827         /*
828          * A Connect Ack with Choke or timeout or failed routing will go to
829          * closed.
830          */
831         if (sk->sk_state == TCP_SYN_SENT) {
832                 DEFINE_WAIT(wait);
833
834                 for (;;) {
835                         prepare_to_wait(sk->sk_sleep, &wait,
836                                         TASK_INTERRUPTIBLE);
837                         if (sk->sk_state != TCP_SYN_SENT)
838                                 break;
839                         if (!signal_pending(current)) {
840                                 release_sock(sk);
841                                 schedule();
842                                 lock_sock(sk);
843                                 continue;
844                         }
845                         err = -ERESTARTSYS;
846                         break;
847                 }
848                 finish_wait(sk->sk_sleep, &wait);
849
850                 if (err)
851                         goto out_release;
852         }
853
854         if (sk->sk_state != TCP_ESTABLISHED) {
855         /* Try next neighbour */
856                 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic);
857                 if (rose->neighbour)
858                         goto rose_try_next_neigh;
859
860                 /* No more neighbours */
861                 sock->state = SS_UNCONNECTED;
862                 err = sock_error(sk);   /* Always set at this point */
863                 goto out_release;
864         }
865
866         sock->state = SS_CONNECTED;
867
868 out_release:
869         release_sock(sk);
870
871         return err;
872 }
873
874 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
875 {
876         struct sk_buff *skb;
877         struct sock *newsk;
878         DEFINE_WAIT(wait);
879         struct sock *sk;
880         int err = 0;
881
882         if ((sk = sock->sk) == NULL)
883                 return -EINVAL;
884
885         lock_sock(sk);
886         if (sk->sk_type != SOCK_SEQPACKET) {
887                 err = -EOPNOTSUPP;
888                 goto out_release;
889         }
890
891         if (sk->sk_state != TCP_LISTEN) {
892                 err = -EINVAL;
893                 goto out_release;
894         }
895
896         /*
897          *      The write queue this time is holding sockets ready to use
898          *      hooked into the SABM we saved
899          */
900         for (;;) {
901                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
902
903                 skb = skb_dequeue(&sk->sk_receive_queue);
904                 if (skb)
905                         break;
906
907                 if (flags & O_NONBLOCK) {
908                         err = -EWOULDBLOCK;
909                         break;
910                 }
911                 if (!signal_pending(current)) {
912                         release_sock(sk);
913                         schedule();
914                         lock_sock(sk);
915                         continue;
916                 }
917                 err = -ERESTARTSYS;
918                 break;
919         }
920         finish_wait(sk->sk_sleep, &wait);
921         if (err)
922                 goto out_release;
923
924         newsk = skb->sk;
925         newsk->sk_socket = newsock;
926         newsk->sk_sleep = &newsock->wait;
927
928         /* Now attach up the new socket */
929         skb->sk = NULL;
930         kfree_skb(skb);
931         sk->sk_ack_backlog--;
932         newsock->sk = newsk;
933
934 out_release:
935         release_sock(sk);
936
937         return err;
938 }
939
940 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
941         int *uaddr_len, int peer)
942 {
943         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
944         struct sock *sk = sock->sk;
945         struct rose_sock *rose = rose_sk(sk);
946         int n;
947
948         if (peer != 0) {
949                 if (sk->sk_state != TCP_ESTABLISHED)
950                         return -ENOTCONN;
951                 srose->srose_family = AF_ROSE;
952                 srose->srose_addr   = rose->dest_addr;
953                 srose->srose_call   = rose->dest_call;
954                 srose->srose_ndigis = rose->dest_ndigis;
955                 for (n = 0; n < rose->dest_ndigis; n++)
956                         srose->srose_digis[n] = rose->dest_digis[n];
957         } else {
958                 srose->srose_family = AF_ROSE;
959                 srose->srose_addr   = rose->source_addr;
960                 srose->srose_call   = rose->source_call;
961                 srose->srose_ndigis = rose->source_ndigis;
962                 for (n = 0; n < rose->source_ndigis; n++)
963                         srose->srose_digis[n] = rose->source_digis[n];
964         }
965
966         *uaddr_len = sizeof(struct full_sockaddr_rose);
967         return 0;
968 }
969
970 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
971 {
972         struct sock *sk;
973         struct sock *make;
974         struct rose_sock *make_rose;
975         struct rose_facilities_struct facilities;
976         int n, len;
977
978         skb->sk = NULL;         /* Initially we don't know who it's for */
979
980         /*
981          *      skb->data points to the rose frame start
982          */
983         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
984
985         len  = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
986         len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
987         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
988                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
989                 return 0;
990         }
991
992         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
993
994         /*
995          * We can't accept the Call Request.
996          */
997         if (sk == NULL || sk_acceptq_is_full(sk) ||
998             (make = rose_make_new(sk)) == NULL) {
999                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1000                 return 0;
1001         }
1002
1003         skb->sk     = make;
1004         make->sk_state = TCP_ESTABLISHED;
1005         make_rose = rose_sk(make);
1006
1007         make_rose->lci           = lci;
1008         make_rose->dest_addr     = facilities.dest_addr;
1009         make_rose->dest_call     = facilities.dest_call;
1010         make_rose->dest_ndigis   = facilities.dest_ndigis;
1011         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1012                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1013         make_rose->source_addr   = facilities.source_addr;
1014         make_rose->source_call   = facilities.source_call;
1015         make_rose->source_ndigis = facilities.source_ndigis;
1016         for (n = 0 ; n < facilities.source_ndigis ; n++)
1017                 make_rose->source_digis[n]= facilities.source_digis[n];
1018         make_rose->neighbour     = neigh;
1019         make_rose->device        = dev;
1020         make_rose->facilities    = facilities;
1021
1022         make_rose->neighbour->use++;
1023
1024         if (rose_sk(sk)->defer) {
1025                 make_rose->state = ROSE_STATE_5;
1026         } else {
1027                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1028                 make_rose->state = ROSE_STATE_3;
1029                 rose_start_idletimer(make);
1030         }
1031
1032         make_rose->condition = 0x00;
1033         make_rose->vs        = 0;
1034         make_rose->va        = 0;
1035         make_rose->vr        = 0;
1036         make_rose->vl        = 0;
1037         sk->sk_ack_backlog++;
1038
1039         rose_insert_socket(make);
1040
1041         skb_queue_head(&sk->sk_receive_queue, skb);
1042
1043         rose_start_heartbeat(make);
1044
1045         if (!sock_flag(sk, SOCK_DEAD))
1046                 sk->sk_data_ready(sk, skb->len);
1047
1048         return 1;
1049 }
1050
1051 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1052                         struct msghdr *msg, size_t len)
1053 {
1054         struct sock *sk = sock->sk;
1055         struct rose_sock *rose = rose_sk(sk);
1056         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1057         int err;
1058         struct full_sockaddr_rose srose;
1059         struct sk_buff *skb;
1060         unsigned char *asmptr;
1061         int n, size, qbit = 0;
1062
1063         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1064                 return -EINVAL;
1065
1066         if (sock_flag(sk, SOCK_ZAPPED))
1067                 return -EADDRNOTAVAIL;
1068
1069         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1070                 send_sig(SIGPIPE, current, 0);
1071                 return -EPIPE;
1072         }
1073
1074         if (rose->neighbour == NULL || rose->device == NULL)
1075                 return -ENETUNREACH;
1076
1077         if (usrose != NULL) {
1078                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1079                         return -EINVAL;
1080                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1081                 memcpy(&srose, usrose, msg->msg_namelen);
1082                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1083                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1084                         return -EISCONN;
1085                 if (srose.srose_ndigis != rose->dest_ndigis)
1086                         return -EISCONN;
1087                 if (srose.srose_ndigis == rose->dest_ndigis) {
1088                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1089                                 if (ax25cmp(&rose->dest_digis[n],
1090                                             &srose.srose_digis[n]))
1091                                         return -EISCONN;
1092                 }
1093                 if (srose.srose_family != AF_ROSE)
1094                         return -EINVAL;
1095         } else {
1096                 if (sk->sk_state != TCP_ESTABLISHED)
1097                         return -ENOTCONN;
1098
1099                 srose.srose_family = AF_ROSE;
1100                 srose.srose_addr   = rose->dest_addr;
1101                 srose.srose_call   = rose->dest_call;
1102                 srose.srose_ndigis = rose->dest_ndigis;
1103                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1104                         srose.srose_digis[n] = rose->dest_digis[n];
1105         }
1106
1107         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1108
1109         /* Build a packet */
1110         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1111         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1112
1113         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1114                 return err;
1115
1116         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1117
1118         /*
1119          *      Put the data on the end
1120          */
1121         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1122
1123         skb_reset_transport_header(skb);
1124         skb_put(skb, len);
1125
1126         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1127         if (err) {
1128                 kfree_skb(skb);
1129                 return err;
1130         }
1131
1132         /*
1133          *      If the Q BIT Include socket option is in force, the first
1134          *      byte of the user data is the logical value of the Q Bit.
1135          */
1136         if (rose->qbitincl) {
1137                 qbit = skb->data[0];
1138                 skb_pull(skb, 1);
1139         }
1140
1141         /*
1142          *      Push down the ROSE header
1143          */
1144         asmptr = skb_push(skb, ROSE_MIN_LEN);
1145
1146         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1147
1148         /* Build a ROSE Network header */
1149         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1150         asmptr[1] = (rose->lci >> 0) & 0xFF;
1151         asmptr[2] = ROSE_DATA;
1152
1153         if (qbit)
1154                 asmptr[0] |= ROSE_Q_BIT;
1155
1156         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1157
1158         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1159
1160         if (sk->sk_state != TCP_ESTABLISHED) {
1161                 kfree_skb(skb);
1162                 return -ENOTCONN;
1163         }
1164
1165 #ifdef M_BIT
1166 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1167         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1168                 unsigned char header[ROSE_MIN_LEN];
1169                 struct sk_buff *skbn;
1170                 int frontlen;
1171                 int lg;
1172
1173                 /* Save a copy of the Header */
1174                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1175                 skb_pull(skb, ROSE_MIN_LEN);
1176
1177                 frontlen = skb_headroom(skb);
1178
1179                 while (skb->len > 0) {
1180                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1181                                 kfree_skb(skb);
1182                                 return err;
1183                         }
1184
1185                         skbn->sk   = sk;
1186                         skbn->free = 1;
1187                         skbn->arp  = 1;
1188
1189                         skb_reserve(skbn, frontlen);
1190
1191                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1192
1193                         /* Copy the user data */
1194                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1195                         skb_pull(skb, lg);
1196
1197                         /* Duplicate the Header */
1198                         skb_push(skbn, ROSE_MIN_LEN);
1199                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1200
1201                         if (skb->len > 0)
1202                                 skbn->data[2] |= M_BIT;
1203
1204                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1205                 }
1206
1207                 skb->free = 1;
1208                 kfree_skb(skb);
1209         } else {
1210                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1211         }
1212 #else
1213         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1214 #endif
1215
1216         rose_kick(sk);
1217
1218         return len;
1219 }
1220
1221
1222 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1223                         struct msghdr *msg, size_t size, int flags)
1224 {
1225         struct sock *sk = sock->sk;
1226         struct rose_sock *rose = rose_sk(sk);
1227         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1228         size_t copied;
1229         unsigned char *asmptr;
1230         struct sk_buff *skb;
1231         int n, er, qbit;
1232
1233         /*
1234          * This works for seqpacket too. The receiver has ordered the queue for
1235          * us! We do one quick check first though
1236          */
1237         if (sk->sk_state != TCP_ESTABLISHED)
1238                 return -ENOTCONN;
1239
1240         /* Now we can treat all alike */
1241         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1242                 return er;
1243
1244         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1245
1246         skb_pull(skb, ROSE_MIN_LEN);
1247
1248         if (rose->qbitincl) {
1249                 asmptr  = skb_push(skb, 1);
1250                 *asmptr = qbit;
1251         }
1252
1253         skb_reset_transport_header(skb);
1254         copied     = skb->len;
1255
1256         if (copied > size) {
1257                 copied = size;
1258                 msg->msg_flags |= MSG_TRUNC;
1259         }
1260
1261         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1262
1263         if (srose != NULL) {
1264                 srose->srose_family = AF_ROSE;
1265                 srose->srose_addr   = rose->dest_addr;
1266                 srose->srose_call   = rose->dest_call;
1267                 srose->srose_ndigis = rose->dest_ndigis;
1268                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1269                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1270                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1271                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1272                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1273                 } else {
1274                         if (rose->dest_ndigis >= 1) {
1275                                 srose->srose_ndigis = 1;
1276                                 srose->srose_digi = rose->dest_digis[0];
1277                         }
1278                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1279                 }
1280         }
1281
1282         skb_free_datagram(sk, skb);
1283
1284         return copied;
1285 }
1286
1287
1288 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1289 {
1290         struct sock *sk = sock->sk;
1291         struct rose_sock *rose = rose_sk(sk);
1292         void __user *argp = (void __user *)arg;
1293
1294         switch (cmd) {
1295         case TIOCOUTQ: {
1296                 long amount;
1297                 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1298                 if (amount < 0)
1299                         amount = 0;
1300                 return put_user(amount, (unsigned int __user *) argp);
1301         }
1302
1303         case TIOCINQ: {
1304                 struct sk_buff *skb;
1305                 long amount = 0L;
1306                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1307                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1308                         amount = skb->len;
1309                 return put_user(amount, (unsigned int __user *) argp);
1310         }
1311
1312         case SIOCGSTAMP:
1313                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1314
1315         case SIOCGSTAMPNS:
1316                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1317
1318         case SIOCGIFADDR:
1319         case SIOCSIFADDR:
1320         case SIOCGIFDSTADDR:
1321         case SIOCSIFDSTADDR:
1322         case SIOCGIFBRDADDR:
1323         case SIOCSIFBRDADDR:
1324         case SIOCGIFNETMASK:
1325         case SIOCSIFNETMASK:
1326         case SIOCGIFMETRIC:
1327         case SIOCSIFMETRIC:
1328                 return -EINVAL;
1329
1330         case SIOCADDRT:
1331         case SIOCDELRT:
1332         case SIOCRSCLRRT:
1333                 if (!capable(CAP_NET_ADMIN))
1334                         return -EPERM;
1335                 return rose_rt_ioctl(cmd, argp);
1336
1337         case SIOCRSGCAUSE: {
1338                 struct rose_cause_struct rose_cause;
1339                 rose_cause.cause      = rose->cause;
1340                 rose_cause.diagnostic = rose->diagnostic;
1341                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1342         }
1343
1344         case SIOCRSSCAUSE: {
1345                 struct rose_cause_struct rose_cause;
1346                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1347                         return -EFAULT;
1348                 rose->cause      = rose_cause.cause;
1349                 rose->diagnostic = rose_cause.diagnostic;
1350                 return 0;
1351         }
1352
1353         case SIOCRSSL2CALL:
1354                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1355                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1356                         ax25_listen_release(&rose_callsign, NULL);
1357                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1358                         return -EFAULT;
1359                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1360                         return ax25_listen_register(&rose_callsign, NULL);
1361
1362                 return 0;
1363
1364         case SIOCRSGL2CALL:
1365                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1366
1367         case SIOCRSACCEPT:
1368                 if (rose->state == ROSE_STATE_5) {
1369                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1370                         rose_start_idletimer(sk);
1371                         rose->condition = 0x00;
1372                         rose->vs        = 0;
1373                         rose->va        = 0;
1374                         rose->vr        = 0;
1375                         rose->vl        = 0;
1376                         rose->state     = ROSE_STATE_3;
1377                 }
1378                 return 0;
1379
1380         default:
1381                 return -ENOIOCTLCMD;
1382         }
1383
1384         return 0;
1385 }
1386
1387 #ifdef CONFIG_PROC_FS
1388 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1389         __acquires(rose_list_lock)
1390 {
1391         int i;
1392         struct sock *s;
1393         struct hlist_node *node;
1394
1395         spin_lock_bh(&rose_list_lock);
1396         if (*pos == 0)
1397                 return SEQ_START_TOKEN;
1398
1399         i = 1;
1400         sk_for_each(s, node, &rose_list) {
1401                 if (i == *pos)
1402                         return s;
1403                 ++i;
1404         }
1405         return NULL;
1406 }
1407
1408 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1409 {
1410         ++*pos;
1411
1412         return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1413                 : sk_next((struct sock *)v);
1414 }
1415
1416 static void rose_info_stop(struct seq_file *seq, void *v)
1417         __releases(rose_list_lock)
1418 {
1419         spin_unlock_bh(&rose_list_lock);
1420 }
1421
1422 static int rose_info_show(struct seq_file *seq, void *v)
1423 {
1424         char buf[11];
1425
1426         if (v == SEQ_START_TOKEN)
1427                 seq_puts(seq,
1428                          "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");
1429
1430         else {
1431                 struct sock *s = v;
1432                 struct rose_sock *rose = rose_sk(s);
1433                 const char *devname, *callsign;
1434                 const struct net_device *dev = rose->device;
1435
1436                 if (!dev)
1437                         devname = "???";
1438                 else
1439                         devname = dev->name;
1440
1441                 seq_printf(seq, "%-10s %-9s ",
1442                         rose2asc(&rose->dest_addr),
1443                         ax2asc(buf, &rose->dest_call));
1444
1445                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1446                         callsign = "??????-?";
1447                 else
1448                         callsign = ax2asc(buf, &rose->source_call);
1449
1450                 seq_printf(seq,
1451                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1452                         rose2asc(&rose->source_addr),
1453                         callsign,
1454                         devname,
1455                         rose->lci & 0x0FFF,
1456                         (rose->neighbour) ? rose->neighbour->number : 0,
1457                         rose->state,
1458                         rose->vs,
1459                         rose->vr,
1460                         rose->va,
1461                         ax25_display_timer(&rose->timer) / HZ,
1462                         rose->t1 / HZ,
1463                         rose->t2 / HZ,
1464                         rose->t3 / HZ,
1465                         rose->hb / HZ,
1466                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1467                         rose->idle / (60 * HZ),
1468                         atomic_read(&s->sk_wmem_alloc),
1469                         atomic_read(&s->sk_rmem_alloc),
1470                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1471         }
1472
1473         return 0;
1474 }
1475
1476 static const struct seq_operations rose_info_seqops = {
1477         .start = rose_info_start,
1478         .next = rose_info_next,
1479         .stop = rose_info_stop,
1480         .show = rose_info_show,
1481 };
1482
1483 static int rose_info_open(struct inode *inode, struct file *file)
1484 {
1485         return seq_open(file, &rose_info_seqops);
1486 }
1487
1488 static const struct file_operations rose_info_fops = {
1489         .owner = THIS_MODULE,
1490         .open = rose_info_open,
1491         .read = seq_read,
1492         .llseek = seq_lseek,
1493         .release = seq_release,
1494 };
1495 #endif  /* CONFIG_PROC_FS */
1496
1497 static struct net_proto_family rose_family_ops = {
1498         .family         =       PF_ROSE,
1499         .create         =       rose_create,
1500         .owner          =       THIS_MODULE,
1501 };
1502
1503 static struct proto_ops rose_proto_ops = {
1504         .family         =       PF_ROSE,
1505         .owner          =       THIS_MODULE,
1506         .release        =       rose_release,
1507         .bind           =       rose_bind,
1508         .connect        =       rose_connect,
1509         .socketpair     =       sock_no_socketpair,
1510         .accept         =       rose_accept,
1511         .getname        =       rose_getname,
1512         .poll           =       datagram_poll,
1513         .ioctl          =       rose_ioctl,
1514         .listen         =       rose_listen,
1515         .shutdown       =       sock_no_shutdown,
1516         .setsockopt     =       rose_setsockopt,
1517         .getsockopt     =       rose_getsockopt,
1518         .sendmsg        =       rose_sendmsg,
1519         .recvmsg        =       rose_recvmsg,
1520         .mmap           =       sock_no_mmap,
1521         .sendpage       =       sock_no_sendpage,
1522 };
1523
1524 static struct notifier_block rose_dev_notifier = {
1525         .notifier_call  =       rose_device_event,
1526 };
1527
1528 static struct net_device **dev_rose;
1529
1530 static struct ax25_protocol rose_pid = {
1531         .pid    = AX25_P_ROSE,
1532         .func   = rose_route_frame
1533 };
1534
1535 static struct ax25_linkfail rose_linkfail_notifier = {
1536         .func   = rose_link_failed
1537 };
1538
1539 static int __init rose_proto_init(void)
1540 {
1541         int i;
1542         int rc;
1543
1544         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1545                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1546                 rc = -EINVAL;
1547                 goto out;
1548         }
1549
1550         rc = proto_register(&rose_proto, 0);
1551         if (rc != 0)
1552                 goto out;
1553
1554         rose_callsign = null_ax25_address;
1555
1556         dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1557         if (dev_rose == NULL) {
1558                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1559                 rc = -ENOMEM;
1560                 goto out_proto_unregister;
1561         }
1562
1563         for (i = 0; i < rose_ndevs; i++) {
1564                 struct net_device *dev;
1565                 char name[IFNAMSIZ];
1566
1567                 sprintf(name, "rose%d", i);
1568                 dev = alloc_netdev(sizeof(struct net_device_stats),
1569                                    name, rose_setup);
1570                 if (!dev) {
1571                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1572                         rc = -ENOMEM;
1573                         goto fail;
1574                 }
1575                 rc = register_netdev(dev);
1576                 if (rc) {
1577                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1578                         free_netdev(dev);
1579                         goto fail;
1580                 }
1581                 lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key);
1582                 dev_rose[i] = dev;
1583         }
1584
1585         sock_register(&rose_family_ops);
1586         register_netdevice_notifier(&rose_dev_notifier);
1587
1588         ax25_register_pid(&rose_pid);
1589         ax25_linkfail_register(&rose_linkfail_notifier);
1590
1591 #ifdef CONFIG_SYSCTL
1592         rose_register_sysctl();
1593 #endif
1594         rose_loopback_init();
1595
1596         rose_add_loopback_neigh();
1597
1598         proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1599         proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1600         proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1601         proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1602 out:
1603         return rc;
1604 fail:
1605         while (--i >= 0) {
1606                 unregister_netdev(dev_rose[i]);
1607                 free_netdev(dev_rose[i]);
1608         }
1609         kfree(dev_rose);
1610 out_proto_unregister:
1611         proto_unregister(&rose_proto);
1612         goto out;
1613 }
1614 module_init(rose_proto_init);
1615
1616 module_param(rose_ndevs, int, 0);
1617 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1618
1619 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1620 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1621 MODULE_LICENSE("GPL");
1622 MODULE_ALIAS_NETPROTO(PF_ROSE);
1623
1624 static void __exit rose_exit(void)
1625 {
1626         int i;
1627
1628         proc_net_remove(&init_net, "rose");
1629         proc_net_remove(&init_net, "rose_neigh");
1630         proc_net_remove(&init_net, "rose_nodes");
1631         proc_net_remove(&init_net, "rose_routes");
1632         rose_loopback_clear();
1633
1634         rose_rt_free();
1635
1636         ax25_protocol_release(AX25_P_ROSE);
1637         ax25_linkfail_release(&rose_linkfail_notifier);
1638
1639         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1640                 ax25_listen_release(&rose_callsign, NULL);
1641
1642 #ifdef CONFIG_SYSCTL
1643         rose_unregister_sysctl();
1644 #endif
1645         unregister_netdevice_notifier(&rose_dev_notifier);
1646
1647         sock_unregister(PF_ROSE);
1648
1649         for (i = 0; i < rose_ndevs; i++) {
1650                 struct net_device *dev = dev_rose[i];
1651
1652                 if (dev) {
1653                         unregister_netdev(dev);
1654                         free_netdev(dev);
1655                 }
1656         }
1657
1658         kfree(dev_rose);
1659         proto_unregister(&rose_proto);
1660 }
1661
1662 module_exit(rose_exit);