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[net-next-2.6.git] / net / rose / af_rose.c
CommitLineData
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) {
815 struct task_struct *tsk = current;
816 DECLARE_WAITQUEUE(wait, tsk);
817
818 add_wait_queue(sk->sk_sleep, &wait);
819 for (;;) {
820 set_current_state(TASK_INTERRUPTIBLE);
821 if (sk->sk_state != TCP_SYN_SENT)
822 break;
2536b94a 823 release_sock(sk);
1da177e4
LT		 824 if (!signal_pending(tsk)) {
825 schedule();
2536b94a 826 lock_sock(sk);
1da177e4
LT		 827 continue;
828 }
829 current->state = TASK_RUNNING;
830 remove_wait_queue(sk->sk_sleep, &wait);
831 return -ERESTARTSYS;
832 }
833 current->state = TASK_RUNNING;
834 remove_wait_queue(sk->sk_sleep, &wait);
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{
859 struct task_struct *tsk = current;
860 DECLARE_WAITQUEUE(wait, tsk);
861 struct sk_buff *skb;
862 struct sock *newsk;
863 struct sock *sk;
864 int err = 0;
865
866 if ((sk = sock->sk) == NULL)
867 return -EINVAL;
868
869 lock_sock(sk);
870 if (sk->sk_type != SOCK_SEQPACKET) {
871 err = -EOPNOTSUPP;
872 goto out;
873 }
874
875 if (sk->sk_state != TCP_LISTEN) {
876 err = -EINVAL;
877 goto out;
878 }
879
880 /*
881 * The write queue this time is holding sockets ready to use
882 * hooked into the SABM we saved
883 */
884 add_wait_queue(sk->sk_sleep, &wait);
885 for (;;) {
886 skb = skb_dequeue(&sk->sk_receive_queue);
887 if (skb)
888 break;
889
890 current->state = TASK_INTERRUPTIBLE;
891 release_sock(sk);
892 if (flags & O_NONBLOCK) {
893 current->state = TASK_RUNNING;
894 remove_wait_queue(sk->sk_sleep, &wait);
895 return -EWOULDBLOCK;
896 }
897 if (!signal_pending(tsk)) {
898 schedule();
899 lock_sock(sk);
900 continue;
901 }
6cee77db
RB		 902 current->state = TASK_RUNNING;
903 remove_wait_queue(sk->sk_sleep, &wait);
1da177e4
LT		 904 return -ERESTARTSYS;
905 }
906 current->state = TASK_RUNNING;
907 remove_wait_queue(sk->sk_sleep, &wait);
908
909 newsk = skb->sk;
910 newsk->sk_socket = newsock;
911 newsk->sk_sleep = &newsock->wait;
912
913 /* Now attach up the new socket */
914 skb->sk = NULL;
915 kfree_skb(skb);
916 sk->sk_ack_backlog--;
917 newsock->sk = newsk;
918
919out:
920 release_sock(sk);
921
922 return err;
923}
924
925static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
926 int *uaddr_len, int peer)
927{
928 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
929 struct sock *sk = sock->sk;
930 struct rose_sock *rose = rose_sk(sk);
931 int n;
932
933 if (peer != 0) {
934 if (sk->sk_state != TCP_ESTABLISHED)
935 return -ENOTCONN;
936 srose->srose_family = AF_ROSE;
937 srose->srose_addr = rose->dest_addr;
938 srose->srose_call = rose->dest_call;
939 srose->srose_ndigis = rose->dest_ndigis;
940 for (n = 0; n < rose->dest_ndigis; n++)
941 srose->srose_digis[n] = rose->dest_digis[n];
942 } else {
943 srose->srose_family = AF_ROSE;
944 srose->srose_addr = rose->source_addr;
945 srose->srose_call = rose->source_call;
946 srose->srose_ndigis = rose->source_ndigis;
947 for (n = 0; n < rose->source_ndigis; n++)
948 srose->srose_digis[n] = rose->source_digis[n];
949 }
950
951 *uaddr_len = sizeof(struct full_sockaddr_rose);
952 return 0;
953}
954
955int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
956{
957 struct sock *sk;
958 struct sock *make;
959 struct rose_sock *make_rose;
960 struct rose_facilities_struct facilities;
961 int n, len;
962
963 skb->sk = NULL; /* Initially we don't know who it's for */
964
965 /*
966 * skb->data points to the rose frame start
967 */
968 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
969
970 len = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
971 len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
972 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
973 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
974 return 0;
975 }
976
977 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
978
979 /*
980 * We can't accept the Call Request.
981 */
982 if (sk == NULL || sk_acceptq_is_full(sk) ||
983 (make = rose_make_new(sk)) == NULL) {
984 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
985 return 0;
986 }
987
988 skb->sk = make;
989 make->sk_state = TCP_ESTABLISHED;
990 make_rose = rose_sk(make);
991
992 make_rose->lci = lci;
993 make_rose->dest_addr = facilities.dest_addr;
994 make_rose->dest_call = facilities.dest_call;
995 make_rose->dest_ndigis = facilities.dest_ndigis;
996 for (n = 0 ; n < facilities.dest_ndigis ; n++)
997 make_rose->dest_digis[n] = facilities.dest_digis[n];
998 make_rose->source_addr = facilities.source_addr;
999 make_rose->source_call = facilities.source_call;
1000 make_rose->source_ndigis = facilities.source_ndigis;
1001 for (n = 0 ; n < facilities.source_ndigis ; n++)
1002 make_rose->source_digis[n]= facilities.source_digis[n];
1003 make_rose->neighbour = neigh;
1004 make_rose->device = dev;
1005 make_rose->facilities = facilities;
1006
1007 make_rose->neighbour->use++;
1008
1009 if (rose_sk(sk)->defer) {
1010 make_rose->state = ROSE_STATE_5;
1011 } else {
1012 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1013 make_rose->state = ROSE_STATE_3;
1014 rose_start_idletimer(make);
1015 }
1016
1017 make_rose->condition = 0x00;
1018 make_rose->vs = 0;
1019 make_rose->va = 0;
1020 make_rose->vr = 0;
1021 make_rose->vl = 0;
1022 sk->sk_ack_backlog++;
1023
1024 rose_insert_socket(make);
1025
1026 skb_queue_head(&sk->sk_receive_queue, skb);
1027
1028 rose_start_heartbeat(make);
1029
1030 if (!sock_flag(sk, SOCK_DEAD))
1031 sk->sk_data_ready(sk, skb->len);
1032
1033 return 1;
1034}
1035
1036static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1037 struct msghdr *msg, size_t len)
1038{
1039 struct sock *sk = sock->sk;
1040 struct rose_sock *rose = rose_sk(sk);
1041 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1042 int err;
1043 struct full_sockaddr_rose srose;
1044 struct sk_buff *skb;
1045 unsigned char *asmptr;
1046 int n, size, qbit = 0;
1047
1048 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1049 return -EINVAL;
1050
1051 if (sock_flag(sk, SOCK_ZAPPED))
1052 return -EADDRNOTAVAIL;
1053
1054 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1055 send_sig(SIGPIPE, current, 0);
1056 return -EPIPE;
1057 }
1058
1059 if (rose->neighbour == NULL || rose->device == NULL)
1060 return -ENETUNREACH;
1061
1062 if (usrose != NULL) {
1063 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1064 return -EINVAL;
1065 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1066 memcpy(&srose, usrose, msg->msg_namelen);
1067 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1068 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1069 return -EISCONN;
1070 if (srose.srose_ndigis != rose->dest_ndigis)
1071 return -EISCONN;
1072 if (srose.srose_ndigis == rose->dest_ndigis) {
1073 for (n = 0 ; n < srose.srose_ndigis ; n++)
1074 if (ax25cmp(&rose->dest_digis[n],
1075 &srose.srose_digis[n]))
1076 return -EISCONN;
1077 }
1078 if (srose.srose_family != AF_ROSE)
1079 return -EINVAL;
1080 } else {
1081 if (sk->sk_state != TCP_ESTABLISHED)
1082 return -ENOTCONN;
1083
1084 srose.srose_family = AF_ROSE;
1085 srose.srose_addr = rose->dest_addr;
1086 srose.srose_call = rose->dest_call;
1087 srose.srose_ndigis = rose->dest_ndigis;
1088 for (n = 0 ; n < rose->dest_ndigis ; n++)
1089 srose.srose_digis[n] = rose->dest_digis[n];
1090 }
1091
1092 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1093
1094 /* Build a packet */
1095 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1096 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1097
1098 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1099 return err;
1100
1101 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1102
1103 /*
1104 * Put the data on the end
1105 */
1106 SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1107
1108 asmptr = skb->h.raw = skb_put(skb, len);
1109
1110 err = memcpy_fromiovec(asmptr, msg->msg_iov, len);
1111 if (err) {
1112 kfree_skb(skb);
1113 return err;
1114 }
1115
1116 /*
1117 * If the Q BIT Include socket option is in force, the first
1118 * byte of the user data is the logical value of the Q Bit.
1119 */
1120 if (rose->qbitincl) {
1121 qbit = skb->data[0];
1122 skb_pull(skb, 1);
1123 }
1124
1125 /*
1126 * Push down the ROSE header
1127 */
1128 asmptr = skb_push(skb, ROSE_MIN_LEN);
1129
1130 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1131
1132 /* Build a ROSE Network header */
1133 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1134 asmptr[1] = (rose->lci >> 0) & 0xFF;
1135 asmptr[2] = ROSE_DATA;
1136
1137 if (qbit)
1138 asmptr[0] |= ROSE_Q_BIT;
1139
1140 SOCK_DEBUG(sk, "ROSE: Built header.\n");
1141
1142 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1143
1144 if (sk->sk_state != TCP_ESTABLISHED) {
1145 kfree_skb(skb);
1146 return -ENOTCONN;
1147 }
1148
1149#ifdef M_BIT
1150#define ROSE_PACLEN (256-ROSE_MIN_LEN)
1151 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1152 unsigned char header[ROSE_MIN_LEN];
1153 struct sk_buff *skbn;
1154 int frontlen;
1155 int lg;
1156
1157 /* Save a copy of the Header */
1158 memcpy(header, skb->data, ROSE_MIN_LEN);
1159 skb_pull(skb, ROSE_MIN_LEN);
1160
1161 frontlen = skb_headroom(skb);
1162
1163 while (skb->len > 0) {
1164 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1165 kfree_skb(skb);
1166 return err;
1167 }
1168
1169 skbn->sk = sk;
1170 skbn->free = 1;
1171 skbn->arp = 1;
1172
1173 skb_reserve(skbn, frontlen);
1174
1175 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1176
1177 /* Copy the user data */
1178 memcpy(skb_put(skbn, lg), skb->data, lg);
1179 skb_pull(skb, lg);
1180
1181 /* Duplicate the Header */
1182 skb_push(skbn, ROSE_MIN_LEN);
1183 memcpy(skbn->data, header, ROSE_MIN_LEN);
1184
1185 if (skb->len > 0)
1186 skbn->data[2] |= M_BIT;
1187
1188 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1189 }
1190
1191 skb->free = 1;
1192 kfree_skb(skb);
1193 } else {
1194 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1195 }
1196#else
1197 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1198#endif
1199
1200 rose_kick(sk);
1201
1202 return len;
1203}
1204
1205
1206static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1207 struct msghdr *msg, size_t size, int flags)
1208{
1209 struct sock *sk = sock->sk;
1210 struct rose_sock *rose = rose_sk(sk);
1211 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1212 size_t copied;
1213 unsigned char *asmptr;
1214 struct sk_buff *skb;
1215 int n, er, qbit;
1216
1217 /*
1218 * This works for seqpacket too. The receiver has ordered the queue for
1219 * us! We do one quick check first though
1220 */
1221 if (sk->sk_state != TCP_ESTABLISHED)
1222 return -ENOTCONN;
1223
1224 /* Now we can treat all alike */
1225 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1226 return er;
1227
1228 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1229
1230 skb_pull(skb, ROSE_MIN_LEN);
1231
1232 if (rose->qbitincl) {
1233 asmptr = skb_push(skb, 1);
1234 *asmptr = qbit;
1235 }
1236
badff6d0 1237 skb_reset_transport_header(skb);
1da177e4
LT		 1238 copied = skb->len;
1239
1240 if (copied > size) {
1241 copied = size;
1242 msg->msg_flags |= MSG_TRUNC;
1243 }
1244
1245 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1246
1247 if (srose != NULL) {
1248 srose->srose_family = AF_ROSE;
1249 srose->srose_addr = rose->dest_addr;
1250 srose->srose_call = rose->dest_call;
1251 srose->srose_ndigis = rose->dest_ndigis;
1252 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1253 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1254 for (n = 0 ; n < rose->dest_ndigis ; n++)
1255 full_srose->srose_digis[n] = rose->dest_digis[n];
1256 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1257 } else {
1258 if (rose->dest_ndigis >= 1) {
1259 srose->srose_ndigis = 1;
1260 srose->srose_digi = rose->dest_digis[0];
1261 }
1262 msg->msg_namelen = sizeof(struct sockaddr_rose);
1263 }
1264 }
1265
1266 skb_free_datagram(sk, skb);
1267
1268 return copied;
1269}
1270
1271
1272static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1273{
1274 struct sock *sk = sock->sk;
1275 struct rose_sock *rose = rose_sk(sk);
1276 void __user *argp = (void __user *)arg;
1277
1278 switch (cmd) {
1279 case TIOCOUTQ: {
1280 long amount;
1281 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1282 if (amount < 0)
1283 amount = 0;
20b7d10a 1284 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1285 }
1286
1287 case TIOCINQ: {
1288 struct sk_buff *skb;
1289 long amount = 0L;
1290 /* These two are safe on a single CPU system as only user tasks fiddle here */
1291 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1292 amount = skb->len;
20b7d10a 1293 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1294 }
1295
1296 case SIOCGSTAMP:
20b7d10a 1297 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1da177e4 1298
ae40eb1e
ED		 1299 case SIOCGSTAMPNS:
1300 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1301
1da177e4
LT		 1302 case SIOCGIFADDR:
1303 case SIOCSIFADDR:
1304 case SIOCGIFDSTADDR:
1305 case SIOCSIFDSTADDR:
1306 case SIOCGIFBRDADDR:
1307 case SIOCSIFBRDADDR:
1308 case SIOCGIFNETMASK:
1309 case SIOCSIFNETMASK:
1310 case SIOCGIFMETRIC:
1311 case SIOCSIFMETRIC:
1312 return -EINVAL;
1313
1314 case SIOCADDRT:
1315 case SIOCDELRT:
1316 case SIOCRSCLRRT:
1317 if (!capable(CAP_NET_ADMIN))
1318 return -EPERM;
1319 return rose_rt_ioctl(cmd, argp);
1320
1321 case SIOCRSGCAUSE: {
1322 struct rose_cause_struct rose_cause;
1323 rose_cause.cause = rose->cause;
1324 rose_cause.diagnostic = rose->diagnostic;
1325 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1326 }
1327
1328 case SIOCRSSCAUSE: {
1329 struct rose_cause_struct rose_cause;
1330 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1331 return -EFAULT;
1332 rose->cause = rose_cause.cause;
1333 rose->diagnostic = rose_cause.diagnostic;
1334 return 0;
1335 }
1336
1337 case SIOCRSSL2CALL:
1338 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1339 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1340 ax25_listen_release(&rose_callsign, NULL);
1341 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1342 return -EFAULT;
1343 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
81dcd169
RB		 1344 return ax25_listen_register(&rose_callsign, NULL);
1345
1da177e4
LT		 1346 return 0;
1347
1348 case SIOCRSGL2CALL:
1349 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1350
1351 case SIOCRSACCEPT:
1352 if (rose->state == ROSE_STATE_5) {
1353 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1354 rose_start_idletimer(sk);
1355 rose->condition = 0x00;
1356 rose->vs = 0;
1357 rose->va = 0;
1358 rose->vr = 0;
1359 rose->vl = 0;
1360 rose->state = ROSE_STATE_3;
1361 }
1362 return 0;
1363
1364 default:
b5e5fa5e 1365 return -ENOIOCTLCMD;
1da177e4
LT		 1366 }
1367
1368 return 0;
1369}
1370
1371#ifdef CONFIG_PROC_FS
1372static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1373{
1374 int i;
1375 struct sock *s;
1376 struct hlist_node *node;
1377
1378 spin_lock_bh(&rose_list_lock);
1379 if (*pos == 0)
1380 return SEQ_START_TOKEN;
3dcf7c5e 1381
1da177e4
LT		 1382 i = 1;
1383 sk_for_each(s, node, &rose_list) {
1384 if (i == *pos)
1385 return s;
1386 ++i;
1387 }
1388 return NULL;
1389}
1390
1391static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1392{
1393 ++*pos;
1394
3dcf7c5e 1395 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1da177e4
LT		 1396 : sk_next((struct sock *)v);
1397}
3dcf7c5e 1398
1da177e4
LT		 1399static void rose_info_stop(struct seq_file *seq, void *v)
1400{
1401 spin_unlock_bh(&rose_list_lock);
1402}
1403
1404static int rose_info_show(struct seq_file *seq, void *v)
1405{
f75268cd
RB		 1406 char buf[11];
1407
1da177e4 1408 if (v == SEQ_START_TOKEN)
3dcf7c5e 1409 seq_puts(seq,
1da177e4
LT		 1410 "dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode\n");
1411
1412 else {
1413 struct sock *s = v;
1414 struct rose_sock *rose = rose_sk(s);
1415 const char *devname, *callsign;
1416 const struct net_device *dev = rose->device;
1417
1418 if (!dev)
1419 devname = "???";
1420 else
1421 devname = dev->name;
3dcf7c5e 1422
1da177e4
LT		 1423 seq_printf(seq, "%-10s %-9s ",
1424 rose2asc(&rose->dest_addr),
f75268cd 1425 ax2asc(buf, &rose->dest_call));
1da177e4
LT		 1426
1427 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1428 callsign = "??????-?";
1429 else
f75268cd 1430 callsign = ax2asc(buf, &rose->source_call);
1da177e4
LT		 1431
1432 seq_printf(seq,
1433 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1434 rose2asc(&rose->source_addr),
1435 callsign,
1436 devname,
1437 rose->lci & 0x0FFF,
1438 (rose->neighbour) ? rose->neighbour->number : 0,
1439 rose->state,
1440 rose->vs,
1441 rose->vr,
1442 rose->va,
1443 ax25_display_timer(&rose->timer) / HZ,
1444 rose->t1 / HZ,
1445 rose->t2 / HZ,
1446 rose->t3 / HZ,
1447 rose->hb / HZ,
1448 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1449 rose->idle / (60 * HZ),
1450 atomic_read(&s->sk_wmem_alloc),
1451 atomic_read(&s->sk_rmem_alloc),
1452 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1453 }
1454
1455 return 0;
1456}
1457
1458static struct seq_operations rose_info_seqops = {
1459 .start = rose_info_start,
1460 .next = rose_info_next,
1461 .stop = rose_info_stop,
1462 .show = rose_info_show,
1463};
1464
1465static int rose_info_open(struct inode *inode, struct file *file)
1466{
1467 return seq_open(file, &rose_info_seqops);
1468}
1469
da7071d7 1470static const struct file_operations rose_info_fops = {
1da177e4
LT		 1471 .owner = THIS_MODULE,
1472 .open = rose_info_open,
1473 .read = seq_read,
1474 .llseek = seq_lseek,
1475 .release = seq_release,
1476};
1477#endif /* CONFIG_PROC_FS */
1478
1479static struct net_proto_family rose_family_ops = {
1480 .family = PF_ROSE,
1481 .create = rose_create,
1482 .owner = THIS_MODULE,
1483};
1484
1485static struct proto_ops rose_proto_ops = {
1486 .family = PF_ROSE,
1487 .owner = THIS_MODULE,
1488 .release = rose_release,
1489 .bind = rose_bind,
1490 .connect = rose_connect,
1491 .socketpair = sock_no_socketpair,
1492 .accept = rose_accept,
1493 .getname = rose_getname,
1494 .poll = datagram_poll,
1495 .ioctl = rose_ioctl,
1496 .listen = rose_listen,
1497 .shutdown = sock_no_shutdown,
1498 .setsockopt = rose_setsockopt,
1499 .getsockopt = rose_getsockopt,
1500 .sendmsg = rose_sendmsg,
1501 .recvmsg = rose_recvmsg,
1502 .mmap = sock_no_mmap,
1503 .sendpage = sock_no_sendpage,
1504};
1505
1506static struct notifier_block rose_dev_notifier = {
1507 .notifier_call = rose_device_event,
1508};
1509
1510static struct net_device **dev_rose;
1511
8d5cf596
RB		 1512static struct ax25_protocol rose_pid = {
1513 .pid = AX25_P_ROSE,
1514 .func = rose_route_frame
1515};
1516
a4282717
RB		 1517static struct ax25_linkfail rose_linkfail_notifier = {
1518 .func = rose_link_failed
1519};
1520
1da177e4
LT		 1521static int __init rose_proto_init(void)
1522{
1523 int i;
a83cd2cc 1524 int rc;
1da177e4 1525
a83cd2cc
AD		 1526 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1527 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1528 rc = -EINVAL;
1529 goto out;
1530 }
1531
1532 rc = proto_register(&rose_proto, 0);
1da177e4
LT		 1533 if (rc != 0)
1534 goto out;
1535
1536 rose_callsign = null_ax25_address;
1537
1b30dd35 1538 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1da177e4
LT		 1539 if (dev_rose == NULL) {
1540 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
a83cd2cc
AD		 1541 rc = -ENOMEM;
1542 goto out_proto_unregister;
1da177e4
LT		 1543 }
1544
1da177e4
LT		 1545 for (i = 0; i < rose_ndevs; i++) {
1546 struct net_device *dev;
1547 char name[IFNAMSIZ];
1548
1549 sprintf(name, "rose%d", i);
3dcf7c5e 1550 dev = alloc_netdev(sizeof(struct net_device_stats),
1da177e4
LT		 1551 name, rose_setup);
1552 if (!dev) {
1553 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
70ff3b66 1554 rc = -ENOMEM;
1da177e4
LT		 1555 goto fail;
1556 }
70ff3b66
AD		 1557 rc = register_netdev(dev);
1558 if (rc) {
520d1b83 1559 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1da177e4
LT		 1560 free_netdev(dev);
1561 goto fail;
1562 }
b1d21ca8 1563 lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key);
1da177e4
LT		 1564 dev_rose[i] = dev;
1565 }
1566
1567 sock_register(&rose_family_ops);
1568 register_netdevice_notifier(&rose_dev_notifier);
1da177e4 1569
8d5cf596 1570 ax25_register_pid(&rose_pid);
a4282717 1571 ax25_linkfail_register(&rose_linkfail_notifier);
1da177e4
LT		 1572
1573#ifdef CONFIG_SYSCTL
1574 rose_register_sysctl();
1575#endif
1576 rose_loopback_init();
1577
1578 rose_add_loopback_neigh();
1579
1580 proc_net_fops_create("rose", S_IRUGO, &rose_info_fops);
1581 proc_net_fops_create("rose_neigh", S_IRUGO, &rose_neigh_fops);
1582 proc_net_fops_create("rose_nodes", S_IRUGO, &rose_nodes_fops);
1583 proc_net_fops_create("rose_routes", S_IRUGO, &rose_routes_fops);
1584out:
1585 return rc;
1586fail:
1587 while (--i >= 0) {
1588 unregister_netdev(dev_rose[i]);
1589 free_netdev(dev_rose[i]);
1590 }
1591 kfree(dev_rose);
a83cd2cc 1592out_proto_unregister:
1da177e4 1593 proto_unregister(&rose_proto);
70ff3b66 1594 goto out;
1da177e4
LT		 1595}
1596module_init(rose_proto_init);
1597
1598module_param(rose_ndevs, int, 0);
1599MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1600
1601MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1602MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1603MODULE_LICENSE("GPL");
1604MODULE_ALIAS_NETPROTO(PF_ROSE);
1605
1606static void __exit rose_exit(void)
1607{
1608 int i;
1609
1610 proc_net_remove("rose");
1611 proc_net_remove("rose_neigh");
1612 proc_net_remove("rose_nodes");
1613 proc_net_remove("rose_routes");
1614 rose_loopback_clear();
1615
1616 rose_rt_free();
1617
1618 ax25_protocol_release(AX25_P_ROSE);
a4282717 1619 ax25_linkfail_release(&rose_linkfail_notifier);
1da177e4
LT		 1620
1621 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1622 ax25_listen_release(&rose_callsign, NULL);
1623
1624#ifdef CONFIG_SYSCTL
1625 rose_unregister_sysctl();
1626#endif
1627 unregister_netdevice_notifier(&rose_dev_notifier);
1628
1629 sock_unregister(PF_ROSE);
1630
1631 for (i = 0; i < rose_ndevs; i++) {
1632 struct net_device *dev = dev_rose[i];
1633
1634 if (dev) {
1635 unregister_netdev(dev);
1636 free_netdev(dev);
1637 }
1638 }
1639
1640 kfree(dev_rose);
1641 proto_unregister(&rose_proto);
1642}
1643
1644module_exit(rose_exit);
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