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[UDP]: Fix length check.
[net-next-2.6.git] / net / rose / af_rose.c
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1da177e4
LT		 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 */
4fc268d2 12
4fc268d2 13#include <linux/capability.h>
1da177e4
LT		 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/ax25.h>
30#include <linux/inet.h>
31#include <linux/netdevice.h>
32#include <linux/if_arp.h>
33#include <linux/skbuff.h>
34#include <net/sock.h>
35#include <asm/system.h>
36#include <asm/uaccess.h>
37#include <linux/fcntl.h>
38#include <linux/termios.h>
39#include <linux/mm.h>
40#include <linux/interrupt.h>
41#include <linux/notifier.h>
42#include <net/rose.h>
43#include <linux/proc_fs.h>
44#include <linux/seq_file.h>
c752f073 45#include <net/tcp_states.h>
1da177e4
LT		 46#include <net/ip.h>
47#include <net/arp.h>
48
49static int rose_ndevs = 10;
50
51int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
52int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
53int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
54int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
55int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
56int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
57int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
58int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
59int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
60int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
61
62static HLIST_HEAD(rose_list);
63static DEFINE_SPINLOCK(rose_list_lock);
64
65static struct proto_ops rose_proto_ops;
66
67ax25_address rose_callsign;
68
b1d21ca8
RB		 69/*
70 * ROSE network devices are virtual network devices encapsulating ROSE
71 * frames into AX.25 which will be sent through an AX.25 device, so form a
72 * special "super class" of normal net devices; split their locks off into a
73 * separate class since they always nest.
74 */
75static struct lock_class_key rose_netdev_xmit_lock_key;
76
1da177e4
LT		 77/*
78 * Convert a ROSE address into text.
79 */
80const char *rose2asc(const rose_address *addr)
81{
82 static char buffer[11];
83
84 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
85 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
86 addr->rose_addr[4] == 0x00) {
87 strcpy(buffer, "*");
88 } else {
89 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
90 addr->rose_addr[1] & 0xFF,
91 addr->rose_addr[2] & 0xFF,
92 addr->rose_addr[3] & 0xFF,
93 addr->rose_addr[4] & 0xFF);
94 }
95
96 return buffer;
97}
98
99/*
100 * Compare two ROSE addresses, 0 == equal.
101 */
102int rosecmp(rose_address *addr1, rose_address *addr2)
103{
104 int i;
105
106 for (i = 0; i < 5; i++)
107 if (addr1->rose_addr[i] != addr2->rose_addr[i])
108 return 1;
109
110 return 0;
111}
112
113/*
114 * Compare two ROSE addresses for only mask digits, 0 == equal.
115 */
116int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
117{
118 int i, j;
119
120 if (mask > 10)
121 return 1;
122
123 for (i = 0; i < mask; i++) {
124 j = i / 2;
125
126 if ((i % 2) != 0) {
127 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
128 return 1;
129 } else {
130 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
131 return 1;
132 }
133 }
134
135 return 0;
136}
137
138/*
139 * Socket removal during an interrupt is now safe.
140 */
141static void rose_remove_socket(struct sock *sk)
142{
143 spin_lock_bh(&rose_list_lock);
144 sk_del_node_init(sk);
145 spin_unlock_bh(&rose_list_lock);
146}
147
148/*
149 * Kill all bound sockets on a broken link layer connection to a
150 * particular neighbour.
151 */
152void rose_kill_by_neigh(struct rose_neigh *neigh)
153{
154 struct sock *s;
155 struct hlist_node *node;
156
157 spin_lock_bh(&rose_list_lock);
158 sk_for_each(s, node, &rose_list) {
159 struct rose_sock *rose = rose_sk(s);
160
161 if (rose->neighbour == neigh) {
162 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
163 rose->neighbour->use--;
164 rose->neighbour = NULL;
165 }
166 }
167 spin_unlock_bh(&rose_list_lock);
168}
169
170/*
171 * Kill all bound sockets on a dropped device.
172 */
173static void rose_kill_by_device(struct net_device *dev)
174{
175 struct sock *s;
176 struct hlist_node *node;
177
178 spin_lock_bh(&rose_list_lock);
179 sk_for_each(s, node, &rose_list) {
180 struct rose_sock *rose = rose_sk(s);
181
182 if (rose->device == dev) {
183 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
184 rose->neighbour->use--;
185 rose->device = NULL;
186 }
187 }
188 spin_unlock_bh(&rose_list_lock);
189}
190
191/*
192 * Handle device status changes.
193 */
194static int rose_device_event(struct notifier_block *this, unsigned long event,
195 void *ptr)
196{
197 struct net_device *dev = (struct net_device *)ptr;
198
199 if (event != NETDEV_DOWN)
200 return NOTIFY_DONE;
201
202 switch (dev->type) {
203 case ARPHRD_ROSE:
204 rose_kill_by_device(dev);
205 break;
206 case ARPHRD_AX25:
207 rose_link_device_down(dev);
208 rose_rt_device_down(dev);
209 break;
210 }
211
212 return NOTIFY_DONE;
213}
214
215/*
216 * Add a socket to the bound sockets list.
217 */
218static void rose_insert_socket(struct sock *sk)
219{
220
221 spin_lock_bh(&rose_list_lock);
222 sk_add_node(sk, &rose_list);
223 spin_unlock_bh(&rose_list_lock);
224}
225
226/*
227 * Find a socket that wants to accept the Call Request we just
228 * received.
229 */
230static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
231{
232 struct sock *s;
233 struct hlist_node *node;
234
235 spin_lock_bh(&rose_list_lock);
236 sk_for_each(s, node, &rose_list) {
237 struct rose_sock *rose = rose_sk(s);
238
239 if (!rosecmp(&rose->source_addr, addr) &&
240 !ax25cmp(&rose->source_call, call) &&
241 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
242 goto found;
243 }
244
245 sk_for_each(s, node, &rose_list) {
246 struct rose_sock *rose = rose_sk(s);
247
248 if (!rosecmp(&rose->source_addr, addr) &&
249 !ax25cmp(&rose->source_call, &null_ax25_address) &&
250 s->sk_state == TCP_LISTEN)
251 goto found;
252 }
253 s = NULL;
254found:
255 spin_unlock_bh(&rose_list_lock);
256 return s;
257}
258
259/*
260 * Find a connected ROSE socket given my LCI and device.
261 */
262struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
263{
264 struct sock *s;
265 struct hlist_node *node;
266
267 spin_lock_bh(&rose_list_lock);
268 sk_for_each(s, node, &rose_list) {
269 struct rose_sock *rose = rose_sk(s);
270
271 if (rose->lci == lci && rose->neighbour == neigh)
272 goto found;
273 }
274 s = NULL;
275found:
276 spin_unlock_bh(&rose_list_lock);
277 return s;
278}
279
280/*
281 * Find a unique LCI for a given device.
282 */
283unsigned int rose_new_lci(struct rose_neigh *neigh)
284{
285 int lci;
286
287 if (neigh->dce_mode) {
288 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
289 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
290 return lci;
291 } else {
292 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
293 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
294 return lci;
295 }
296
297 return 0;
298}
299
300/*
301 * Deferred destroy.
302 */
303void rose_destroy_socket(struct sock *);
304
305/*
306 * Handler for deferred kills.
307 */
308static void rose_destroy_timer(unsigned long data)
309{
310 rose_destroy_socket((struct sock *)data);
311}
312
313/*
314 * This is called from user mode and the timers. Thus it protects itself
315 * against interrupt users but doesn't worry about being called during
316 * work. Once it is removed from the queue no interrupt or bottom half
317 * will touch it and we are (fairly 8-) ) safe.
318 */
319void rose_destroy_socket(struct sock *sk)
320{
321 struct sk_buff *skb;
322
323 rose_remove_socket(sk);
324 rose_stop_heartbeat(sk);
325 rose_stop_idletimer(sk);
326 rose_stop_timer(sk);
327
328 rose_clear_queues(sk); /* Flush the queues */
329
330 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
331 if (skb->sk != sk) { /* A pending connection */
332 /* Queue the unaccepted socket for death */
333 sock_set_flag(skb->sk, SOCK_DEAD);
334 rose_start_heartbeat(skb->sk);
335 rose_sk(skb->sk)->state = ROSE_STATE_0;
336 }
337
338 kfree_skb(skb);
339 }
340
341 if (atomic_read(&sk->sk_wmem_alloc) ||
342 atomic_read(&sk->sk_rmem_alloc)) {
343 /* Defer: outstanding buffers */
344 init_timer(&sk->sk_timer);
345 sk->sk_timer.expires = jiffies + 10 * HZ;
346 sk->sk_timer.function = rose_destroy_timer;
347 sk->sk_timer.data = (unsigned long)sk;
348 add_timer(&sk->sk_timer);
349 } else
350 sock_put(sk);
351}
352
353/*
354 * Handling for system calls applied via the various interfaces to a
355 * ROSE socket object.
356 */
357
358static int rose_setsockopt(struct socket *sock, int level, int optname,
359 char __user *optval, int optlen)
360{
361 struct sock *sk = sock->sk;
362 struct rose_sock *rose = rose_sk(sk);
363 int opt;
364
365 if (level != SOL_ROSE)
366 return -ENOPROTOOPT;
367
368 if (optlen < sizeof(int))
369 return -EINVAL;
370
371 if (get_user(opt, (int __user *)optval))
372 return -EFAULT;
373
374 switch (optname) {
375 case ROSE_DEFER:
376 rose->defer = opt ? 1 : 0;
377 return 0;
378
379 case ROSE_T1:
380 if (opt < 1)
381 return -EINVAL;
382 rose->t1 = opt * HZ;
383 return 0;
384
385 case ROSE_T2:
386 if (opt < 1)
387 return -EINVAL;
388 rose->t2 = opt * HZ;
389 return 0;
390
391 case ROSE_T3:
392 if (opt < 1)
393 return -EINVAL;
394 rose->t3 = opt * HZ;
395 return 0;
396
397 case ROSE_HOLDBACK:
398 if (opt < 1)
399 return -EINVAL;
400 rose->hb = opt * HZ;
401 return 0;
402
403 case ROSE_IDLE:
404 if (opt < 0)
405 return -EINVAL;
406 rose->idle = opt * 60 * HZ;
407 return 0;
408
409 case ROSE_QBITINCL:
410 rose->qbitincl = opt ? 1 : 0;
411 return 0;
412
413 default:
414 return -ENOPROTOOPT;
415 }
416}
417
418static int rose_getsockopt(struct socket *sock, int level, int optname,
419 char __user *optval, int __user *optlen)
420{
421 struct sock *sk = sock->sk;
422 struct rose_sock *rose = rose_sk(sk);
423 int val = 0;
424 int len;
425
426 if (level != SOL_ROSE)
427 return -ENOPROTOOPT;
428
429 if (get_user(len, optlen))
430 return -EFAULT;
431
432 if (len < 0)
433 return -EINVAL;
434
435 switch (optname) {
436 case ROSE_DEFER:
437 val = rose->defer;
438 break;
439
440 case ROSE_T1:
441 val = rose->t1 / HZ;
442 break;
443
444 case ROSE_T2:
445 val = rose->t2 / HZ;
446 break;
447
448 case ROSE_T3:
449 val = rose->t3 / HZ;
450 break;
451
452 case ROSE_HOLDBACK:
453 val = rose->hb / HZ;
454 break;
455
456 case ROSE_IDLE:
457 val = rose->idle / (60 * HZ);
458 break;
459
460 case ROSE_QBITINCL:
461 val = rose->qbitincl;
462 break;
463
464 default:
465 return -ENOPROTOOPT;
466 }
467
468 len = min_t(unsigned int, len, sizeof(int));
469
470 if (put_user(len, optlen))
471 return -EFAULT;
472
473 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
474}
475
476static int rose_listen(struct socket *sock, int backlog)
477{
478 struct sock *sk = sock->sk;
479
480 if (sk->sk_state != TCP_LISTEN) {
481 struct rose_sock *rose = rose_sk(sk);
482
483 rose->dest_ndigis = 0;
484 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
485 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
486 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
487 sk->sk_max_ack_backlog = backlog;
488 sk->sk_state = TCP_LISTEN;
489 return 0;
490 }
491
492 return -EOPNOTSUPP;
493}
494
495static struct proto rose_proto = {
496 .name = "ROSE",
497 .owner = THIS_MODULE,
498 .obj_size = sizeof(struct rose_sock),
499};
500
501static int rose_create(struct socket *sock, int protocol)
502{
503 struct sock *sk;
504 struct rose_sock *rose;
505
506 if (sock->type != SOCK_SEQPACKET || protocol != 0)
507 return -ESOCKTNOSUPPORT;
508
509 if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
510 return -ENOMEM;
511
512 rose = rose_sk(sk);
513
514 sock_init_data(sock, sk);
515
516 skb_queue_head_init(&rose->ack_queue);
517#ifdef M_BIT
518 skb_queue_head_init(&rose->frag_queue);
519 rose->fraglen = 0;
520#endif
521
522 sock->ops = &rose_proto_ops;
523 sk->sk_protocol = protocol;
524
525 init_timer(&rose->timer);
526 init_timer(&rose->idletimer);
527
82e84249
RB		 528 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
529 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
530 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
531 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
532 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
1da177e4
LT		 533
534 rose->state = ROSE_STATE_0;
535
536 return 0;
537}
538
539static struct sock *rose_make_new(struct sock *osk)
540{
541 struct sock *sk;
542 struct rose_sock *rose, *orose;
543
544 if (osk->sk_type != SOCK_SEQPACKET)
545 return NULL;
546
547 if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
548 return NULL;
549
550 rose = rose_sk(sk);
551
552 sock_init_data(NULL, sk);
553
554 skb_queue_head_init(&rose->ack_queue);
555#ifdef M_BIT
556 skb_queue_head_init(&rose->frag_queue);
557 rose->fraglen = 0;
558#endif
559
560 sk->sk_type = osk->sk_type;
561 sk->sk_socket = osk->sk_socket;
562 sk->sk_priority = osk->sk_priority;
563 sk->sk_protocol = osk->sk_protocol;
564 sk->sk_rcvbuf = osk->sk_rcvbuf;
565 sk->sk_sndbuf = osk->sk_sndbuf;
566 sk->sk_state = TCP_ESTABLISHED;
567 sk->sk_sleep = osk->sk_sleep;
53b924b3 568 sock_copy_flags(sk, osk);
1da177e4
LT		 569
570 init_timer(&rose->timer);
571 init_timer(&rose->idletimer);
572
573 orose = rose_sk(osk);
574 rose->t1 = orose->t1;
575 rose->t2 = orose->t2;
576 rose->t3 = orose->t3;
577 rose->hb = orose->hb;
578 rose->idle = orose->idle;
579 rose->defer = orose->defer;
580 rose->device = orose->device;
581 rose->qbitincl = orose->qbitincl;
582
583 return sk;
584}
585
586static int rose_release(struct socket *sock)
587{
588 struct sock *sk = sock->sk;
589 struct rose_sock *rose;
590
591 if (sk == NULL) return 0;
592
593 rose = rose_sk(sk);
594
595 switch (rose->state) {
596 case ROSE_STATE_0:
597 rose_disconnect(sk, 0, -1, -1);
598 rose_destroy_socket(sk);
599 break;
600
601 case ROSE_STATE_2:
602 rose->neighbour->use--;
603 rose_disconnect(sk, 0, -1, -1);
604 rose_destroy_socket(sk);
605 break;
606
607 case ROSE_STATE_1:
608 case ROSE_STATE_3:
609 case ROSE_STATE_4:
610 case ROSE_STATE_5:
611 rose_clear_queues(sk);
612 rose_stop_idletimer(sk);
613 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
614 rose_start_t3timer(sk);
615 rose->state = ROSE_STATE_2;
616 sk->sk_state = TCP_CLOSE;
617 sk->sk_shutdown |= SEND_SHUTDOWN;
618 sk->sk_state_change(sk);
619 sock_set_flag(sk, SOCK_DEAD);
620 sock_set_flag(sk, SOCK_DESTROY);
621 break;
622
623 default:
624 break;
625 }
626
627 sock->sk = NULL;
628
629 return 0;
630}
631
632static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
633{
634 struct sock *sk = sock->sk;
635 struct rose_sock *rose = rose_sk(sk);
636 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
637 struct net_device *dev;
01d7dd0e
RB		 638 ax25_address *source;
639 ax25_uid_assoc *user;
1da177e4
LT		 640 int n;
641
642 if (!sock_flag(sk, SOCK_ZAPPED))
643 return -EINVAL;
644
645 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
646 return -EINVAL;
647
648 if (addr->srose_family != AF_ROSE)
649 return -EINVAL;
650
651 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
652 return -EINVAL;
653
654 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
655 return -EINVAL;
656
657 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
658 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
659 return -EADDRNOTAVAIL;
660 }
661
662 source = &addr->srose_call;
663
01d7dd0e
RB		 664 user = ax25_findbyuid(current->euid);
665 if (user) {
666 rose->source_call = user->call;
667 ax25_uid_put(user);
668 } else {
1da177e4
LT		 669 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
670 return -EACCES;
01d7dd0e 671 rose->source_call = *source;
1da177e4
LT		 672 }
673
674 rose->source_addr = addr->srose_addr;
1da177e4
LT		 675 rose->device = dev;
676 rose->source_ndigis = addr->srose_ndigis;
677
678 if (addr_len == sizeof(struct full_sockaddr_rose)) {
679 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
680 for (n = 0 ; n < addr->srose_ndigis ; n++)
681 rose->source_digis[n] = full_addr->srose_digis[n];
682 } else {
683 if (rose->source_ndigis == 1) {
684 rose->source_digis[0] = addr->srose_digi;
685 }
686 }
687
688 rose_insert_socket(sk);
689
690 sock_reset_flag(sk, SOCK_ZAPPED);
691 SOCK_DEBUG(sk, "ROSE: socket is bound\n");
692 return 0;
693}
694
695static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
696{
697 struct sock *sk = sock->sk;
698 struct rose_sock *rose = rose_sk(sk);
699 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
700 unsigned char cause, diagnostic;
1da177e4 701 struct net_device *dev;
01d7dd0e 702 ax25_uid_assoc *user;
2536b94a 703 int n, err = 0;
1da177e4
LT		 704
705 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
706 return -EINVAL;
707
708 if (addr->srose_family != AF_ROSE)
709 return -EINVAL;
710
711 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
712 return -EINVAL;
713
714 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
715 return -EINVAL;
716
717 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
718 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
719 return -EINVAL;
720
2536b94a
RB		 721 lock_sock(sk);
722
723 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
724 /* Connect completed during a ERESTARTSYS event */
725 sock->state = SS_CONNECTED;
726 goto out_release;
727 }
728
729 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
730 sock->state = SS_UNCONNECTED;
731 err = -ECONNREFUSED;
732 goto out_release;
733 }
734
735 if (sk->sk_state == TCP_ESTABLISHED) {
736 /* No reconnect on a seqpacket socket */
737 err = -EISCONN;
738 goto out_release;
739 }
740
741 sk->sk_state = TCP_CLOSE;
742 sock->state = SS_UNCONNECTED;
743
1da177e4
LT		 744 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
745 &diagnostic);
746 if (!rose->neighbour)
747 return -ENETUNREACH;
748
749 rose->lci = rose_new_lci(rose->neighbour);
2536b94a
RB		 750 if (!rose->lci) {
751 err = -ENETUNREACH;
752 goto out_release;
753 }
1da177e4
LT		 754
755 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
756 sock_reset_flag(sk, SOCK_ZAPPED);
757
2536b94a
RB		 758 if ((dev = rose_dev_first()) == NULL) {
759 err = -ENETUNREACH;
760 goto out_release;
761 }
1da177e4 762
01d7dd0e 763 user = ax25_findbyuid(current->euid);
2536b94a
RB		 764 if (!user) {
765 err = -EINVAL;
766 goto out_release;
767 }
1da177e4
LT		 768
769 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
01d7dd0e 770 rose->source_call = user->call;
1da177e4 771 rose->device = dev;
01d7dd0e 772 ax25_uid_put(user);
1da177e4
LT		 773
774 rose_insert_socket(sk); /* Finish the bind */
775 }
d85838c5 776rose_try_next_neigh:
1da177e4
LT		 777 rose->dest_addr = addr->srose_addr;
778 rose->dest_call = addr->srose_call;
779 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
780 rose->dest_ndigis = addr->srose_ndigis;
781
782 if (addr_len == sizeof(struct full_sockaddr_rose)) {
783 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
784 for (n = 0 ; n < addr->srose_ndigis ; n++)
785 rose->dest_digis[n] = full_addr->srose_digis[n];
786 } else {
787 if (rose->dest_ndigis == 1) {
788 rose->dest_digis[0] = addr->srose_digi;
789 }
790 }
791
792 /* Move to connecting socket, start sending Connect Requests */
793 sock->state = SS_CONNECTING;
794 sk->sk_state = TCP_SYN_SENT;
795
796 rose->state = ROSE_STATE_1;
797
798 rose->neighbour->use++;
799
800 rose_write_internal(sk, ROSE_CALL_REQUEST);
801 rose_start_heartbeat(sk);
802 rose_start_t1timer(sk);
803
804 /* Now the loop */
2536b94a
RB		 805 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
806 err = -EINPROGRESS;
807 goto out_release;
808 }
1da177e4
LT		 809
810 /*
811 * A Connect Ack with Choke or timeout or failed routing will go to
812 * closed.
813 */
814 if (sk->sk_state == TCP_SYN_SENT) {
75606dc6 815 DEFINE_WAIT(wait);
1da177e4 816
1da177e4 817 for (;;) {
75606dc6
RB		 818 prepare_to_wait(sk->sk_sleep, &wait,
819 TASK_INTERRUPTIBLE);
1da177e4
LT		 820 if (sk->sk_state != TCP_SYN_SENT)
821 break;
75606dc6
RB		 822 if (!signal_pending(current)) {
823 release_sock(sk);
1da177e4 824 schedule();
2536b94a 825 lock_sock(sk);
1da177e4
LT		 826 continue;
827 }
75606dc6
RB		 828 err = -ERESTARTSYS;
829 break;
1da177e4 830 }
75606dc6
RB		 831 finish_wait(sk->sk_sleep, &wait);
832
833 if (err)
834 goto out_release;
1da177e4
LT		 835 }
836
837 if (sk->sk_state != TCP_ESTABLISHED) {
d85838c5
RB		 838 /* Try next neighbour */
839 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic);
840 if (rose->neighbour)
841 goto rose_try_next_neigh;
2536b94a
RB		 842
843 /* No more neighbours */
1da177e4 844 sock->state = SS_UNCONNECTED;
2536b94a
RB		 845 err = sock_error(sk); /* Always set at this point */
846 goto out_release;
1da177e4
LT		 847 }
848
849 sock->state = SS_CONNECTED;
850
2536b94a
RB		 851out_release:
852 release_sock(sk);
853
854 return err;
1da177e4
LT		 855}
856
857static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
858{
1da177e4
LT		 859 struct sk_buff *skb;
860 struct sock *newsk;
75606dc6 861 DEFINE_WAIT(wait);
1da177e4
LT		 862 struct sock *sk;
863 int err = 0;
864
865 if ((sk = sock->sk) == NULL)
866 return -EINVAL;
867
868 lock_sock(sk);
869 if (sk->sk_type != SOCK_SEQPACKET) {
870 err = -EOPNOTSUPP;
75606dc6 871 goto out_release;
1da177e4
LT		 872 }
873
874 if (sk->sk_state != TCP_LISTEN) {
875 err = -EINVAL;
75606dc6 876 goto out_release;
1da177e4
LT		 877 }
878
879 /*
880 * The write queue this time is holding sockets ready to use
881 * hooked into the SABM we saved
882 */
1da177e4 883 for (;;) {
75606dc6
RB		 884 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
885
1da177e4
LT		 886 skb = skb_dequeue(&sk->sk_receive_queue);
887 if (skb)
888 break;
889
1da177e4 890 if (flags & O_NONBLOCK) {
75606dc6
RB		 891 err = -EWOULDBLOCK;
892 break;
1da177e4 893 }
75606dc6
RB		 894 if (!signal_pending(current)) {
895 release_sock(sk);
1da177e4
LT		 896 schedule();
897 lock_sock(sk);
898 continue;
899 }
75606dc6
RB		 900 err = -ERESTARTSYS;
901 break;
1da177e4 902 }
75606dc6
RB		 903 finish_wait(sk->sk_sleep, &wait);
904 if (err)
905 goto out_release;
1da177e4
LT		 906
907 newsk = skb->sk;
908 newsk->sk_socket = newsock;
909 newsk->sk_sleep = &newsock->wait;
910
911 /* Now attach up the new socket */
912 skb->sk = NULL;
913 kfree_skb(skb);
914 sk->sk_ack_backlog--;
915 newsock->sk = newsk;
916
75606dc6 917out_release:
1da177e4
LT		 918 release_sock(sk);
919
920 return err;
921}
922
923static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
924 int *uaddr_len, int peer)
925{
926 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
927 struct sock *sk = sock->sk;
928 struct rose_sock *rose = rose_sk(sk);
929 int n;
930
931 if (peer != 0) {
932 if (sk->sk_state != TCP_ESTABLISHED)
933 return -ENOTCONN;
934 srose->srose_family = AF_ROSE;
935 srose->srose_addr = rose->dest_addr;
936 srose->srose_call = rose->dest_call;
937 srose->srose_ndigis = rose->dest_ndigis;
938 for (n = 0; n < rose->dest_ndigis; n++)
939 srose->srose_digis[n] = rose->dest_digis[n];
940 } else {
941 srose->srose_family = AF_ROSE;
942 srose->srose_addr = rose->source_addr;
943 srose->srose_call = rose->source_call;
944 srose->srose_ndigis = rose->source_ndigis;
945 for (n = 0; n < rose->source_ndigis; n++)
946 srose->srose_digis[n] = rose->source_digis[n];
947 }
948
949 *uaddr_len = sizeof(struct full_sockaddr_rose);
950 return 0;
951}
952
953int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
954{
955 struct sock *sk;
956 struct sock *make;
957 struct rose_sock *make_rose;
958 struct rose_facilities_struct facilities;
959 int n, len;
960
961 skb->sk = NULL; /* Initially we don't know who it's for */
962
963 /*
964 * skb->data points to the rose frame start
965 */
966 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
967
968 len = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
969 len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
970 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
971 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
972 return 0;
973 }
974
975 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
976
977 /*
978 * We can't accept the Call Request.
979 */
980 if (sk == NULL || sk_acceptq_is_full(sk) ||
981 (make = rose_make_new(sk)) == NULL) {
982 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
983 return 0;
984 }
985
986 skb->sk = make;
987 make->sk_state = TCP_ESTABLISHED;
988 make_rose = rose_sk(make);
989
990 make_rose->lci = lci;
991 make_rose->dest_addr = facilities.dest_addr;
992 make_rose->dest_call = facilities.dest_call;
993 make_rose->dest_ndigis = facilities.dest_ndigis;
994 for (n = 0 ; n < facilities.dest_ndigis ; n++)
995 make_rose->dest_digis[n] = facilities.dest_digis[n];
996 make_rose->source_addr = facilities.source_addr;
997 make_rose->source_call = facilities.source_call;
998 make_rose->source_ndigis = facilities.source_ndigis;
999 for (n = 0 ; n < facilities.source_ndigis ; n++)
1000 make_rose->source_digis[n]= facilities.source_digis[n];
1001 make_rose->neighbour = neigh;
1002 make_rose->device = dev;
1003 make_rose->facilities = facilities;
1004
1005 make_rose->neighbour->use++;
1006
1007 if (rose_sk(sk)->defer) {
1008 make_rose->state = ROSE_STATE_5;
1009 } else {
1010 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1011 make_rose->state = ROSE_STATE_3;
1012 rose_start_idletimer(make);
1013 }
1014
1015 make_rose->condition = 0x00;
1016 make_rose->vs = 0;
1017 make_rose->va = 0;
1018 make_rose->vr = 0;
1019 make_rose->vl = 0;
1020 sk->sk_ack_backlog++;
1021
1022 rose_insert_socket(make);
1023
1024 skb_queue_head(&sk->sk_receive_queue, skb);
1025
1026 rose_start_heartbeat(make);
1027
1028 if (!sock_flag(sk, SOCK_DEAD))
1029 sk->sk_data_ready(sk, skb->len);
1030
1031 return 1;
1032}
1033
1034static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1035 struct msghdr *msg, size_t len)
1036{
1037 struct sock *sk = sock->sk;
1038 struct rose_sock *rose = rose_sk(sk);
1039 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1040 int err;
1041 struct full_sockaddr_rose srose;
1042 struct sk_buff *skb;
1043 unsigned char *asmptr;
1044 int n, size, qbit = 0;
1045
1046 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1047 return -EINVAL;
1048
1049 if (sock_flag(sk, SOCK_ZAPPED))
1050 return -EADDRNOTAVAIL;
1051
1052 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1053 send_sig(SIGPIPE, current, 0);
1054 return -EPIPE;
1055 }
1056
1057 if (rose->neighbour == NULL || rose->device == NULL)
1058 return -ENETUNREACH;
1059
1060 if (usrose != NULL) {
1061 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1062 return -EINVAL;
1063 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1064 memcpy(&srose, usrose, msg->msg_namelen);
1065 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1066 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1067 return -EISCONN;
1068 if (srose.srose_ndigis != rose->dest_ndigis)
1069 return -EISCONN;
1070 if (srose.srose_ndigis == rose->dest_ndigis) {
1071 for (n = 0 ; n < srose.srose_ndigis ; n++)
1072 if (ax25cmp(&rose->dest_digis[n],
1073 &srose.srose_digis[n]))
1074 return -EISCONN;
1075 }
1076 if (srose.srose_family != AF_ROSE)
1077 return -EINVAL;
1078 } else {
1079 if (sk->sk_state != TCP_ESTABLISHED)
1080 return -ENOTCONN;
1081
1082 srose.srose_family = AF_ROSE;
1083 srose.srose_addr = rose->dest_addr;
1084 srose.srose_call = rose->dest_call;
1085 srose.srose_ndigis = rose->dest_ndigis;
1086 for (n = 0 ; n < rose->dest_ndigis ; n++)
1087 srose.srose_digis[n] = rose->dest_digis[n];
1088 }
1089
1090 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1091
1092 /* Build a packet */
1093 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1094 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1095
1096 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1097 return err;
1098
1099 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1100
1101 /*
1102 * Put the data on the end
1103 */
1104 SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1105
eeeb0374
ACM		 1106 skb_reset_transport_header(skb);
1107 skb_put(skb, len);
1da177e4 1108
eeeb0374 1109 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1da177e4
LT		 1110 if (err) {
1111 kfree_skb(skb);
1112 return err;
1113 }
1114
1115 /*
1116 * If the Q BIT Include socket option is in force, the first
1117 * byte of the user data is the logical value of the Q Bit.
1118 */
1119 if (rose->qbitincl) {
1120 qbit = skb->data[0];
1121 skb_pull(skb, 1);
1122 }
1123
1124 /*
1125 * Push down the ROSE header
1126 */
1127 asmptr = skb_push(skb, ROSE_MIN_LEN);
1128
1129 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1130
1131 /* Build a ROSE Network header */
1132 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1133 asmptr[1] = (rose->lci >> 0) & 0xFF;
1134 asmptr[2] = ROSE_DATA;
1135
1136 if (qbit)
1137 asmptr[0] |= ROSE_Q_BIT;
1138
1139 SOCK_DEBUG(sk, "ROSE: Built header.\n");
1140
1141 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1142
1143 if (sk->sk_state != TCP_ESTABLISHED) {
1144 kfree_skb(skb);
1145 return -ENOTCONN;
1146 }
1147
1148#ifdef M_BIT
1149#define ROSE_PACLEN (256-ROSE_MIN_LEN)
1150 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1151 unsigned char header[ROSE_MIN_LEN];
1152 struct sk_buff *skbn;
1153 int frontlen;
1154 int lg;
1155
1156 /* Save a copy of the Header */
d626f62b 1157 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1da177e4
LT		 1158 skb_pull(skb, ROSE_MIN_LEN);
1159
1160 frontlen = skb_headroom(skb);
1161
1162 while (skb->len > 0) {
1163 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1164 kfree_skb(skb);
1165 return err;
1166 }
1167
1168 skbn->sk = sk;
1169 skbn->free = 1;
1170 skbn->arp = 1;
1171
1172 skb_reserve(skbn, frontlen);
1173
1174 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1175
1176 /* Copy the user data */
d626f62b 1177 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1da177e4
LT		 1178 skb_pull(skb, lg);
1179
1180 /* Duplicate the Header */
1181 skb_push(skbn, ROSE_MIN_LEN);
27d7ff46 1182 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1da177e4
LT		 1183
1184 if (skb->len > 0)
1185 skbn->data[2] |= M_BIT;
1186
1187 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1188 }
1189
1190 skb->free = 1;
1191 kfree_skb(skb);
1192 } else {
1193 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1194 }
1195#else
1196 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1197#endif
1198
1199 rose_kick(sk);
1200
1201 return len;
1202}
1203
1204
1205static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1206 struct msghdr *msg, size_t size, int flags)
1207{
1208 struct sock *sk = sock->sk;
1209 struct rose_sock *rose = rose_sk(sk);
1210 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1211 size_t copied;
1212 unsigned char *asmptr;
1213 struct sk_buff *skb;
1214 int n, er, qbit;
1215
1216 /*
1217 * This works for seqpacket too. The receiver has ordered the queue for
1218 * us! We do one quick check first though
1219 */
1220 if (sk->sk_state != TCP_ESTABLISHED)
1221 return -ENOTCONN;
1222
1223 /* Now we can treat all alike */
1224 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1225 return er;
1226
1227 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1228
1229 skb_pull(skb, ROSE_MIN_LEN);
1230
1231 if (rose->qbitincl) {
1232 asmptr = skb_push(skb, 1);
1233 *asmptr = qbit;
1234 }
1235
badff6d0 1236 skb_reset_transport_header(skb);
1da177e4
LT		 1237 copied = skb->len;
1238
1239 if (copied > size) {
1240 copied = size;
1241 msg->msg_flags |= MSG_TRUNC;
1242 }
1243
1244 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1245
1246 if (srose != NULL) {
1247 srose->srose_family = AF_ROSE;
1248 srose->srose_addr = rose->dest_addr;
1249 srose->srose_call = rose->dest_call;
1250 srose->srose_ndigis = rose->dest_ndigis;
1251 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1252 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1253 for (n = 0 ; n < rose->dest_ndigis ; n++)
1254 full_srose->srose_digis[n] = rose->dest_digis[n];
1255 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1256 } else {
1257 if (rose->dest_ndigis >= 1) {
1258 srose->srose_ndigis = 1;
1259 srose->srose_digi = rose->dest_digis[0];
1260 }
1261 msg->msg_namelen = sizeof(struct sockaddr_rose);
1262 }
1263 }
1264
1265 skb_free_datagram(sk, skb);
1266
1267 return copied;
1268}
1269
1270
1271static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1272{
1273 struct sock *sk = sock->sk;
1274 struct rose_sock *rose = rose_sk(sk);
1275 void __user *argp = (void __user *)arg;
1276
1277 switch (cmd) {
1278 case TIOCOUTQ: {
1279 long amount;
1280 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1281 if (amount < 0)
1282 amount = 0;
20b7d10a 1283 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1284 }
1285
1286 case TIOCINQ: {
1287 struct sk_buff *skb;
1288 long amount = 0L;
1289 /* These two are safe on a single CPU system as only user tasks fiddle here */
1290 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1291 amount = skb->len;
20b7d10a 1292 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1293 }
1294
1295 case SIOCGSTAMP:
20b7d10a 1296 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1da177e4 1297
ae40eb1e
ED		 1298 case SIOCGSTAMPNS:
1299 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1300
1da177e4
LT		 1301 case SIOCGIFADDR:
1302 case SIOCSIFADDR:
1303 case SIOCGIFDSTADDR:
1304 case SIOCSIFDSTADDR:
1305 case SIOCGIFBRDADDR:
1306 case SIOCSIFBRDADDR:
1307 case SIOCGIFNETMASK:
1308 case SIOCSIFNETMASK:
1309 case SIOCGIFMETRIC:
1310 case SIOCSIFMETRIC:
1311 return -EINVAL;
1312
1313 case SIOCADDRT:
1314 case SIOCDELRT:
1315 case SIOCRSCLRRT:
1316 if (!capable(CAP_NET_ADMIN))
1317 return -EPERM;
1318 return rose_rt_ioctl(cmd, argp);
1319
1320 case SIOCRSGCAUSE: {
1321 struct rose_cause_struct rose_cause;
1322 rose_cause.cause = rose->cause;
1323 rose_cause.diagnostic = rose->diagnostic;
1324 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1325 }
1326
1327 case SIOCRSSCAUSE: {
1328 struct rose_cause_struct rose_cause;
1329 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1330 return -EFAULT;
1331 rose->cause = rose_cause.cause;
1332 rose->diagnostic = rose_cause.diagnostic;
1333 return 0;
1334 }
1335
1336 case SIOCRSSL2CALL:
1337 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1338 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1339 ax25_listen_release(&rose_callsign, NULL);
1340 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1341 return -EFAULT;
1342 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
81dcd169
RB		 1343 return ax25_listen_register(&rose_callsign, NULL);
1344
1da177e4
LT		 1345 return 0;
1346
1347 case SIOCRSGL2CALL:
1348 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1349
1350 case SIOCRSACCEPT:
1351 if (rose->state == ROSE_STATE_5) {
1352 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1353 rose_start_idletimer(sk);
1354 rose->condition = 0x00;
1355 rose->vs = 0;
1356 rose->va = 0;
1357 rose->vr = 0;
1358 rose->vl = 0;
1359 rose->state = ROSE_STATE_3;
1360 }
1361 return 0;
1362
1363 default:
b5e5fa5e 1364 return -ENOIOCTLCMD;
1da177e4
LT		 1365 }
1366
1367 return 0;
1368}
1369
1370#ifdef CONFIG_PROC_FS
1371static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1372{
1373 int i;
1374 struct sock *s;
1375 struct hlist_node *node;
1376
1377 spin_lock_bh(&rose_list_lock);
1378 if (*pos == 0)
1379 return SEQ_START_TOKEN;
3dcf7c5e 1380
1da177e4
LT		 1381 i = 1;
1382 sk_for_each(s, node, &rose_list) {
1383 if (i == *pos)
1384 return s;
1385 ++i;
1386 }
1387 return NULL;
1388}
1389
1390static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1391{
1392 ++*pos;
1393
3dcf7c5e 1394 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1da177e4
LT		 1395 : sk_next((struct sock *)v);
1396}
3dcf7c5e 1397
1da177e4
LT		 1398static void rose_info_stop(struct seq_file *seq, void *v)
1399{
1400 spin_unlock_bh(&rose_list_lock);
1401}
1402
1403static int rose_info_show(struct seq_file *seq, void *v)
1404{
f75268cd
RB		 1405 char buf[11];
1406
1da177e4 1407 if (v == SEQ_START_TOKEN)
3dcf7c5e 1408 seq_puts(seq,
1da177e4
LT		 1409 "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");
1410
1411 else {
1412 struct sock *s = v;
1413 struct rose_sock *rose = rose_sk(s);
1414 const char *devname, *callsign;
1415 const struct net_device *dev = rose->device;
1416
1417 if (!dev)
1418 devname = "???";
1419 else
1420 devname = dev->name;
3dcf7c5e 1421
1da177e4
LT		 1422 seq_printf(seq, "%-10s %-9s ",
1423 rose2asc(&rose->dest_addr),
f75268cd 1424 ax2asc(buf, &rose->dest_call));
1da177e4
LT		 1425
1426 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1427 callsign = "??????-?";
1428 else
f75268cd 1429 callsign = ax2asc(buf, &rose->source_call);
1da177e4
LT		 1430
1431 seq_printf(seq,
1432 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1433 rose2asc(&rose->source_addr),
1434 callsign,
1435 devname,
1436 rose->lci & 0x0FFF,
1437 (rose->neighbour) ? rose->neighbour->number : 0,
1438 rose->state,
1439 rose->vs,
1440 rose->vr,
1441 rose->va,
1442 ax25_display_timer(&rose->timer) / HZ,
1443 rose->t1 / HZ,
1444 rose->t2 / HZ,
1445 rose->t3 / HZ,
1446 rose->hb / HZ,
1447 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1448 rose->idle / (60 * HZ),
1449 atomic_read(&s->sk_wmem_alloc),
1450 atomic_read(&s->sk_rmem_alloc),
1451 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1452 }
1453
1454 return 0;
1455}
1456
1457static struct seq_operations rose_info_seqops = {
1458 .start = rose_info_start,
1459 .next = rose_info_next,
1460 .stop = rose_info_stop,
1461 .show = rose_info_show,
1462};
1463
1464static int rose_info_open(struct inode *inode, struct file *file)
1465{
1466 return seq_open(file, &rose_info_seqops);
1467}
1468
da7071d7 1469static const struct file_operations rose_info_fops = {
1da177e4
LT		 1470 .owner = THIS_MODULE,
1471 .open = rose_info_open,
1472 .read = seq_read,
1473 .llseek = seq_lseek,
1474 .release = seq_release,
1475};
1476#endif /* CONFIG_PROC_FS */
1477
1478static struct net_proto_family rose_family_ops = {
1479 .family = PF_ROSE,
1480 .create = rose_create,
1481 .owner = THIS_MODULE,
1482};
1483
1484static struct proto_ops rose_proto_ops = {
1485 .family = PF_ROSE,
1486 .owner = THIS_MODULE,
1487 .release = rose_release,
1488 .bind = rose_bind,
1489 .connect = rose_connect,
1490 .socketpair = sock_no_socketpair,
1491 .accept = rose_accept,
1492 .getname = rose_getname,
1493 .poll = datagram_poll,
1494 .ioctl = rose_ioctl,
1495 .listen = rose_listen,
1496 .shutdown = sock_no_shutdown,
1497 .setsockopt = rose_setsockopt,
1498 .getsockopt = rose_getsockopt,
1499 .sendmsg = rose_sendmsg,
1500 .recvmsg = rose_recvmsg,
1501 .mmap = sock_no_mmap,
1502 .sendpage = sock_no_sendpage,
1503};
1504
1505static struct notifier_block rose_dev_notifier = {
1506 .notifier_call = rose_device_event,
1507};
1508
1509static struct net_device **dev_rose;
1510
8d5cf596
RB		 1511static struct ax25_protocol rose_pid = {
1512 .pid = AX25_P_ROSE,
1513 .func = rose_route_frame
1514};
1515
a4282717
RB		 1516static struct ax25_linkfail rose_linkfail_notifier = {
1517 .func = rose_link_failed
1518};
1519
1da177e4
LT		 1520static int __init rose_proto_init(void)
1521{
1522 int i;
a83cd2cc 1523 int rc;
1da177e4 1524
a83cd2cc
AD		 1525 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1526 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1527 rc = -EINVAL;
1528 goto out;
1529 }
1530
1531 rc = proto_register(&rose_proto, 0);
1da177e4
LT		 1532 if (rc != 0)
1533 goto out;
1534
1535 rose_callsign = null_ax25_address;
1536
1b30dd35 1537 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1da177e4
LT		 1538 if (dev_rose == NULL) {
1539 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
a83cd2cc
AD		 1540 rc = -ENOMEM;
1541 goto out_proto_unregister;
1da177e4
LT		 1542 }
1543
1da177e4
LT		 1544 for (i = 0; i < rose_ndevs; i++) {
1545 struct net_device *dev;
1546 char name[IFNAMSIZ];
1547
1548 sprintf(name, "rose%d", i);
3dcf7c5e 1549 dev = alloc_netdev(sizeof(struct net_device_stats),
1da177e4
LT		 1550 name, rose_setup);
1551 if (!dev) {
1552 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
70ff3b66 1553 rc = -ENOMEM;
1da177e4
LT		 1554 goto fail;
1555 }
70ff3b66
AD		 1556 rc = register_netdev(dev);
1557 if (rc) {
520d1b83 1558 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1da177e4
LT		 1559 free_netdev(dev);
1560 goto fail;
1561 }
b1d21ca8 1562 lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key);
1da177e4
LT		 1563 dev_rose[i] = dev;
1564 }
1565
1566 sock_register(&rose_family_ops);
1567 register_netdevice_notifier(&rose_dev_notifier);
1da177e4 1568
8d5cf596 1569 ax25_register_pid(&rose_pid);
a4282717 1570 ax25_linkfail_register(&rose_linkfail_notifier);
1da177e4
LT		 1571
1572#ifdef CONFIG_SYSCTL
1573 rose_register_sysctl();
1574#endif
1575 rose_loopback_init();
1576
1577 rose_add_loopback_neigh();
1578
1579 proc_net_fops_create("rose", S_IRUGO, &rose_info_fops);
1580 proc_net_fops_create("rose_neigh", S_IRUGO, &rose_neigh_fops);
1581 proc_net_fops_create("rose_nodes", S_IRUGO, &rose_nodes_fops);
1582 proc_net_fops_create("rose_routes", S_IRUGO, &rose_routes_fops);
1583out:
1584 return rc;
1585fail:
1586 while (--i >= 0) {
1587 unregister_netdev(dev_rose[i]);
1588 free_netdev(dev_rose[i]);
1589 }
1590 kfree(dev_rose);
a83cd2cc 1591out_proto_unregister:
1da177e4 1592 proto_unregister(&rose_proto);
70ff3b66 1593 goto out;
1da177e4
LT		 1594}
1595module_init(rose_proto_init);
1596
1597module_param(rose_ndevs, int, 0);
1598MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1599
1600MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1601MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1602MODULE_LICENSE("GPL");
1603MODULE_ALIAS_NETPROTO(PF_ROSE);
1604
1605static void __exit rose_exit(void)
1606{
1607 int i;
1608
1609 proc_net_remove("rose");
1610 proc_net_remove("rose_neigh");
1611 proc_net_remove("rose_nodes");
1612 proc_net_remove("rose_routes");
1613 rose_loopback_clear();
1614
1615 rose_rt_free();
1616
1617 ax25_protocol_release(AX25_P_ROSE);
a4282717 1618 ax25_linkfail_release(&rose_linkfail_notifier);
1da177e4
LT		 1619
1620 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1621 ax25_listen_release(&rose_callsign, NULL);
1622
1623#ifdef CONFIG_SYSCTL
1624 rose_unregister_sysctl();
1625#endif
1626 unregister_netdevice_notifier(&rose_dev_notifier);
1627
1628 sock_unregister(PF_ROSE);
1629
1630 for (i = 0; i < rose_ndevs; i++) {
1631 struct net_device *dev = dev_rose[i];
1632
1633 if (dev) {
1634 unregister_netdev(dev);
1635 free_netdev(dev);
1636 }
1637 }
1638
1639 kfree(dev_rose);
1640 proto_unregister(&rose_proto);
1641}
1642
1643module_exit(rose_exit);
Clone of davem's net-next-2.6 tree