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[NET]: Remove bogus zero_it argument from sk_alloc
[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>
457c4cbc 29#include <net/net_namespace.h>
1da177e4
LT		 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>
c752f073 46#include <net/tcp_states.h>
1da177e4
LT		 47#include <net/ip.h>
48#include <net/arp.h>
49
50static int rose_ndevs = 10;
51
52int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
53int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
54int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
55int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
56int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
57int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
58int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
59int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
60int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
61int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
62
63static HLIST_HEAD(rose_list);
64static DEFINE_SPINLOCK(rose_list_lock);
65
66static struct proto_ops rose_proto_ops;
67
68ax25_address rose_callsign;
69
b1d21ca8
RB		 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 */
76static struct lock_class_key rose_netdev_xmit_lock_key;
77
1da177e4
LT		 78/*
79 * Convert a ROSE address into text.
80 */
81const 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 */
103int 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 */
117int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
118{
119 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 */
142static 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 */
153void 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 */
174static 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 */
195static 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
e9dc8653
EB		 200 if (dev->nd_net != &init_net)
201 return NOTIFY_DONE;
202
1da177e4
LT		 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 */
222static 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 */
234static 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;
258found:
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 */
266struct 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;
279found:
280 spin_unlock_bh(&rose_list_lock);
281 return s;
282}
283
284/*
285 * Find a unique LCI for a given device.
286 */
287unsigned 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 */
307void rose_destroy_socket(struct sock *);
308
309/*
310 * Handler for deferred kills.
311 */
312static 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 */
323void 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 init_timer(&sk->sk_timer);
349 sk->sk_timer.expires = jiffies + 10 * HZ;
350 sk->sk_timer.function = rose_destroy_timer;
351 sk->sk_timer.data = (unsigned long)sk;
352 add_timer(&sk->sk_timer);
353 } else
354 sock_put(sk);
355}
356
357/*
358 * Handling for system calls applied via the various interfaces to a
359 * ROSE socket object.
360 */
361
362static int rose_setsockopt(struct socket *sock, int level, int optname,
363 char __user *optval, int optlen)
364{
365 struct sock *sk = sock->sk;
366 struct rose_sock *rose = rose_sk(sk);
367 int opt;
368
369 if (level != SOL_ROSE)
370 return -ENOPROTOOPT;
371
372 if (optlen < sizeof(int))
373 return -EINVAL;
374
375 if (get_user(opt, (int __user *)optval))
376 return -EFAULT;
377
378 switch (optname) {
379 case ROSE_DEFER:
380 rose->defer = opt ? 1 : 0;
381 return 0;
382
383 case ROSE_T1:
384 if (opt < 1)
385 return -EINVAL;
386 rose->t1 = opt * HZ;
387 return 0;
388
389 case ROSE_T2:
390 if (opt < 1)
391 return -EINVAL;
392 rose->t2 = opt * HZ;
393 return 0;
394
395 case ROSE_T3:
396 if (opt < 1)
397 return -EINVAL;
398 rose->t3 = opt * HZ;
399 return 0;
400
401 case ROSE_HOLDBACK:
402 if (opt < 1)
403 return -EINVAL;
404 rose->hb = opt * HZ;
405 return 0;
406
407 case ROSE_IDLE:
408 if (opt < 0)
409 return -EINVAL;
410 rose->idle = opt * 60 * HZ;
411 return 0;
412
413 case ROSE_QBITINCL:
414 rose->qbitincl = opt ? 1 : 0;
415 return 0;
416
417 default:
418 return -ENOPROTOOPT;
419 }
420}
421
422static int rose_getsockopt(struct socket *sock, int level, int optname,
423 char __user *optval, int __user *optlen)
424{
425 struct sock *sk = sock->sk;
426 struct rose_sock *rose = rose_sk(sk);
427 int val = 0;
428 int len;
429
430 if (level != SOL_ROSE)
431 return -ENOPROTOOPT;
432
433 if (get_user(len, optlen))
434 return -EFAULT;
435
436 if (len < 0)
437 return -EINVAL;
438
439 switch (optname) {
440 case ROSE_DEFER:
441 val = rose->defer;
442 break;
443
444 case ROSE_T1:
445 val = rose->t1 / HZ;
446 break;
447
448 case ROSE_T2:
449 val = rose->t2 / HZ;
450 break;
451
452 case ROSE_T3:
453 val = rose->t3 / HZ;
454 break;
455
456 case ROSE_HOLDBACK:
457 val = rose->hb / HZ;
458 break;
459
460 case ROSE_IDLE:
461 val = rose->idle / (60 * HZ);
462 break;
463
464 case ROSE_QBITINCL:
465 val = rose->qbitincl;
466 break;
467
468 default:
469 return -ENOPROTOOPT;
470 }
471
472 len = min_t(unsigned int, len, sizeof(int));
473
474 if (put_user(len, optlen))
475 return -EFAULT;
476
477 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
478}
479
480static int rose_listen(struct socket *sock, int backlog)
481{
482 struct sock *sk = sock->sk;
483
484 if (sk->sk_state != TCP_LISTEN) {
485 struct rose_sock *rose = rose_sk(sk);
486
487 rose->dest_ndigis = 0;
488 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
489 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
490 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
491 sk->sk_max_ack_backlog = backlog;
492 sk->sk_state = TCP_LISTEN;
493 return 0;
494 }
495
496 return -EOPNOTSUPP;
497}
498
499static struct proto rose_proto = {
500 .name = "ROSE",
501 .owner = THIS_MODULE,
502 .obj_size = sizeof(struct rose_sock),
503};
504
1b8d7ae4 505static int rose_create(struct net *net, struct socket *sock, int protocol)
1da177e4
LT		 506{
507 struct sock *sk;
508 struct rose_sock *rose;
509
1b8d7ae4
EB		 510 if (net != &init_net)
511 return -EAFNOSUPPORT;
512
1da177e4
LT		 513 if (sock->type != SOCK_SEQPACKET || protocol != 0)
514 return -ESOCKTNOSUPPORT;
515
1b8d7ae4 516 if ((sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
1da177e4
LT		 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
82e84249
RB		 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);
1da177e4
LT		 540
541 rose->state = ROSE_STATE_0;
542
543 return 0;
544}
545
546static 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
1b8d7ae4 554 if ((sk = sk_alloc(osk->sk_net, PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
1da177e4
LT		 555 return NULL;
556
557 rose = rose_sk(sk);
558
559 sock_init_data(NULL, sk);
560
561 skb_queue_head_init(&rose->ack_queue);
562#ifdef M_BIT
563 skb_queue_head_init(&rose->frag_queue);
564 rose->fraglen = 0;
565#endif
566
567 sk->sk_type = osk->sk_type;
568 sk->sk_socket = osk->sk_socket;
569 sk->sk_priority = osk->sk_priority;
570 sk->sk_protocol = osk->sk_protocol;
571 sk->sk_rcvbuf = osk->sk_rcvbuf;
572 sk->sk_sndbuf = osk->sk_sndbuf;
573 sk->sk_state = TCP_ESTABLISHED;
574 sk->sk_sleep = osk->sk_sleep;
53b924b3 575 sock_copy_flags(sk, osk);
1da177e4
LT		 576
577 init_timer(&rose->timer);
578 init_timer(&rose->idletimer);
579
580 orose = rose_sk(osk);
581 rose->t1 = orose->t1;
582 rose->t2 = orose->t2;
583 rose->t3 = orose->t3;
584 rose->hb = orose->hb;
585 rose->idle = orose->idle;
586 rose->defer = orose->defer;
587 rose->device = orose->device;
588 rose->qbitincl = orose->qbitincl;
589
590 return sk;
591}
592
593static int rose_release(struct socket *sock)
594{
595 struct sock *sk = sock->sk;
596 struct rose_sock *rose;
597
598 if (sk == NULL) return 0;
599
600 rose = rose_sk(sk);
601
602 switch (rose->state) {
603 case ROSE_STATE_0:
604 rose_disconnect(sk, 0, -1, -1);
605 rose_destroy_socket(sk);
606 break;
607
608 case ROSE_STATE_2:
609 rose->neighbour->use--;
610 rose_disconnect(sk, 0, -1, -1);
611 rose_destroy_socket(sk);
612 break;
613
614 case ROSE_STATE_1:
615 case ROSE_STATE_3:
616 case ROSE_STATE_4:
617 case ROSE_STATE_5:
618 rose_clear_queues(sk);
619 rose_stop_idletimer(sk);
620 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
621 rose_start_t3timer(sk);
622 rose->state = ROSE_STATE_2;
623 sk->sk_state = TCP_CLOSE;
624 sk->sk_shutdown |= SEND_SHUTDOWN;
625 sk->sk_state_change(sk);
626 sock_set_flag(sk, SOCK_DEAD);
627 sock_set_flag(sk, SOCK_DESTROY);
628 break;
629
630 default:
631 break;
632 }
633
634 sock->sk = NULL;
635
636 return 0;
637}
638
639static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
640{
641 struct sock *sk = sock->sk;
642 struct rose_sock *rose = rose_sk(sk);
643 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
644 struct net_device *dev;
01d7dd0e
RB		 645 ax25_address *source;
646 ax25_uid_assoc *user;
1da177e4
LT		 647 int n;
648
649 if (!sock_flag(sk, SOCK_ZAPPED))
650 return -EINVAL;
651
652 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
653 return -EINVAL;
654
655 if (addr->srose_family != AF_ROSE)
656 return -EINVAL;
657
658 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
659 return -EINVAL;
660
661 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
662 return -EINVAL;
663
664 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
665 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
666 return -EADDRNOTAVAIL;
667 }
668
669 source = &addr->srose_call;
670
01d7dd0e
RB		 671 user = ax25_findbyuid(current->euid);
672 if (user) {
673 rose->source_call = user->call;
674 ax25_uid_put(user);
675 } else {
1da177e4
LT		 676 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
677 return -EACCES;
01d7dd0e 678 rose->source_call = *source;
1da177e4
LT		 679 }
680
681 rose->source_addr = addr->srose_addr;
1da177e4
LT		 682 rose->device = dev;
683 rose->source_ndigis = addr->srose_ndigis;
684
685 if (addr_len == sizeof(struct full_sockaddr_rose)) {
686 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
687 for (n = 0 ; n < addr->srose_ndigis ; n++)
688 rose->source_digis[n] = full_addr->srose_digis[n];
689 } else {
690 if (rose->source_ndigis == 1) {
691 rose->source_digis[0] = addr->srose_digi;
692 }
693 }
694
695 rose_insert_socket(sk);
696
697 sock_reset_flag(sk, SOCK_ZAPPED);
698 SOCK_DEBUG(sk, "ROSE: socket is bound\n");
699 return 0;
700}
701
702static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
703{
704 struct sock *sk = sock->sk;
705 struct rose_sock *rose = rose_sk(sk);
706 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
707 unsigned char cause, diagnostic;
1da177e4 708 struct net_device *dev;
01d7dd0e 709 ax25_uid_assoc *user;
2536b94a 710 int n, err = 0;
1da177e4
LT		 711
712 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
713 return -EINVAL;
714
715 if (addr->srose_family != AF_ROSE)
716 return -EINVAL;
717
718 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
719 return -EINVAL;
720
721 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
722 return -EINVAL;
723
724 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
725 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
726 return -EINVAL;
727
2536b94a
RB		 728 lock_sock(sk);
729
730 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
731 /* Connect completed during a ERESTARTSYS event */
732 sock->state = SS_CONNECTED;
733 goto out_release;
734 }
735
736 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
737 sock->state = SS_UNCONNECTED;
738 err = -ECONNREFUSED;
739 goto out_release;
740 }
741
742 if (sk->sk_state == TCP_ESTABLISHED) {
743 /* No reconnect on a seqpacket socket */
744 err = -EISCONN;
745 goto out_release;
746 }
747
748 sk->sk_state = TCP_CLOSE;
749 sock->state = SS_UNCONNECTED;
750
1da177e4
LT		 751 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
752 &diagnostic);
753 if (!rose->neighbour)
754 return -ENETUNREACH;
755
756 rose->lci = rose_new_lci(rose->neighbour);
2536b94a
RB		 757 if (!rose->lci) {
758 err = -ENETUNREACH;
759 goto out_release;
760 }
1da177e4
LT		 761
762 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
763 sock_reset_flag(sk, SOCK_ZAPPED);
764
2536b94a
RB		 765 if ((dev = rose_dev_first()) == NULL) {
766 err = -ENETUNREACH;
767 goto out_release;
768 }
1da177e4 769
01d7dd0e 770 user = ax25_findbyuid(current->euid);
2536b94a
RB		 771 if (!user) {
772 err = -EINVAL;
773 goto out_release;
774 }
1da177e4
LT		 775
776 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
01d7dd0e 777 rose->source_call = user->call;
1da177e4 778 rose->device = dev;
01d7dd0e 779 ax25_uid_put(user);
1da177e4
LT		 780
781 rose_insert_socket(sk); /* Finish the bind */
782 }
d85838c5 783rose_try_next_neigh:
1da177e4
LT		 784 rose->dest_addr = addr->srose_addr;
785 rose->dest_call = addr->srose_call;
786 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
787 rose->dest_ndigis = addr->srose_ndigis;
788
789 if (addr_len == sizeof(struct full_sockaddr_rose)) {
790 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
791 for (n = 0 ; n < addr->srose_ndigis ; n++)
792 rose->dest_digis[n] = full_addr->srose_digis[n];
793 } else {
794 if (rose->dest_ndigis == 1) {
795 rose->dest_digis[0] = addr->srose_digi;
796 }
797 }
798
799 /* Move to connecting socket, start sending Connect Requests */
800 sock->state = SS_CONNECTING;
801 sk->sk_state = TCP_SYN_SENT;
802
803 rose->state = ROSE_STATE_1;
804
805 rose->neighbour->use++;
806
807 rose_write_internal(sk, ROSE_CALL_REQUEST);
808 rose_start_heartbeat(sk);
809 rose_start_t1timer(sk);
810
811 /* Now the loop */
2536b94a
RB		 812 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
813 err = -EINPROGRESS;
814 goto out_release;
815 }
1da177e4
LT		 816
817 /*
818 * A Connect Ack with Choke or timeout or failed routing will go to
819 * closed.
820 */
821 if (sk->sk_state == TCP_SYN_SENT) {
75606dc6 822 DEFINE_WAIT(wait);
1da177e4 823
1da177e4 824 for (;;) {
75606dc6 825 prepare_to_wait(sk->sk_sleep, &wait,
6140efb5 826 TASK_INTERRUPTIBLE);
1da177e4
LT		 827 if (sk->sk_state != TCP_SYN_SENT)
828 break;
75606dc6
RB		 829 if (!signal_pending(current)) {
830 release_sock(sk);
1da177e4 831 schedule();
2536b94a 832 lock_sock(sk);
1da177e4
LT		 833 continue;
834 }
75606dc6
RB		 835 err = -ERESTARTSYS;
836 break;
1da177e4 837 }
75606dc6
RB		 838 finish_wait(sk->sk_sleep, &wait);
839
840 if (err)
841 goto out_release;
1da177e4
LT		 842 }
843
844 if (sk->sk_state != TCP_ESTABLISHED) {
d85838c5
RB		 845 /* Try next neighbour */
846 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic);
847 if (rose->neighbour)
848 goto rose_try_next_neigh;
2536b94a
RB		 849
850 /* No more neighbours */
1da177e4 851 sock->state = SS_UNCONNECTED;
2536b94a
RB		 852 err = sock_error(sk); /* Always set at this point */
853 goto out_release;
1da177e4
LT		 854 }
855
856 sock->state = SS_CONNECTED;
857
2536b94a
RB		 858out_release:
859 release_sock(sk);
860
861 return err;
1da177e4
LT		 862}
863
864static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
865{
1da177e4
LT		 866 struct sk_buff *skb;
867 struct sock *newsk;
75606dc6 868 DEFINE_WAIT(wait);
1da177e4
LT		 869 struct sock *sk;
870 int err = 0;
871
872 if ((sk = sock->sk) == NULL)
873 return -EINVAL;
874
875 lock_sock(sk);
876 if (sk->sk_type != SOCK_SEQPACKET) {
877 err = -EOPNOTSUPP;
75606dc6 878 goto out_release;
1da177e4
LT		 879 }
880
881 if (sk->sk_state != TCP_LISTEN) {
882 err = -EINVAL;
75606dc6 883 goto out_release;
1da177e4
LT		 884 }
885
886 /*
887 * The write queue this time is holding sockets ready to use
888 * hooked into the SABM we saved
889 */
1da177e4 890 for (;;) {
75606dc6
RB		 891 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
892
1da177e4
LT		 893 skb = skb_dequeue(&sk->sk_receive_queue);
894 if (skb)
895 break;
896
1da177e4 897 if (flags & O_NONBLOCK) {
75606dc6
RB		 898 err = -EWOULDBLOCK;
899 break;
1da177e4 900 }
75606dc6
RB		 901 if (!signal_pending(current)) {
902 release_sock(sk);
1da177e4
LT		 903 schedule();
904 lock_sock(sk);
905 continue;
906 }
75606dc6
RB		 907 err = -ERESTARTSYS;
908 break;
1da177e4 909 }
75606dc6
RB		 910 finish_wait(sk->sk_sleep, &wait);
911 if (err)
912 goto out_release;
1da177e4
LT		 913
914 newsk = skb->sk;
915 newsk->sk_socket = newsock;
916 newsk->sk_sleep = &newsock->wait;
917
918 /* Now attach up the new socket */
919 skb->sk = NULL;
920 kfree_skb(skb);
921 sk->sk_ack_backlog--;
922 newsock->sk = newsk;
923
75606dc6 924out_release:
1da177e4
LT		 925 release_sock(sk);
926
927 return err;
928}
929
930static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
931 int *uaddr_len, int peer)
932{
933 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
934 struct sock *sk = sock->sk;
935 struct rose_sock *rose = rose_sk(sk);
936 int n;
937
938 if (peer != 0) {
939 if (sk->sk_state != TCP_ESTABLISHED)
940 return -ENOTCONN;
941 srose->srose_family = AF_ROSE;
942 srose->srose_addr = rose->dest_addr;
943 srose->srose_call = rose->dest_call;
944 srose->srose_ndigis = rose->dest_ndigis;
945 for (n = 0; n < rose->dest_ndigis; n++)
946 srose->srose_digis[n] = rose->dest_digis[n];
947 } else {
948 srose->srose_family = AF_ROSE;
949 srose->srose_addr = rose->source_addr;
950 srose->srose_call = rose->source_call;
951 srose->srose_ndigis = rose->source_ndigis;
952 for (n = 0; n < rose->source_ndigis; n++)
953 srose->srose_digis[n] = rose->source_digis[n];
954 }
955
956 *uaddr_len = sizeof(struct full_sockaddr_rose);
957 return 0;
958}
959
960int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
961{
962 struct sock *sk;
963 struct sock *make;
964 struct rose_sock *make_rose;
965 struct rose_facilities_struct facilities;
966 int n, len;
967
968 skb->sk = NULL; /* Initially we don't know who it's for */
969
970 /*
971 * skb->data points to the rose frame start
972 */
973 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
974
975 len = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
976 len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
977 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
978 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
979 return 0;
980 }
981
982 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
983
984 /*
985 * We can't accept the Call Request.
986 */
987 if (sk == NULL || sk_acceptq_is_full(sk) ||
988 (make = rose_make_new(sk)) == NULL) {
989 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
990 return 0;
991 }
992
993 skb->sk = make;
994 make->sk_state = TCP_ESTABLISHED;
995 make_rose = rose_sk(make);
996
997 make_rose->lci = lci;
998 make_rose->dest_addr = facilities.dest_addr;
999 make_rose->dest_call = facilities.dest_call;
1000 make_rose->dest_ndigis = facilities.dest_ndigis;
1001 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1002 make_rose->dest_digis[n] = facilities.dest_digis[n];
1003 make_rose->source_addr = facilities.source_addr;
1004 make_rose->source_call = facilities.source_call;
1005 make_rose->source_ndigis = facilities.source_ndigis;
1006 for (n = 0 ; n < facilities.source_ndigis ; n++)
1007 make_rose->source_digis[n]= facilities.source_digis[n];
1008 make_rose->neighbour = neigh;
1009 make_rose->device = dev;
1010 make_rose->facilities = facilities;
1011
1012 make_rose->neighbour->use++;
1013
1014 if (rose_sk(sk)->defer) {
1015 make_rose->state = ROSE_STATE_5;
1016 } else {
1017 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1018 make_rose->state = ROSE_STATE_3;
1019 rose_start_idletimer(make);
1020 }
1021
1022 make_rose->condition = 0x00;
1023 make_rose->vs = 0;
1024 make_rose->va = 0;
1025 make_rose->vr = 0;
1026 make_rose->vl = 0;
1027 sk->sk_ack_backlog++;
1028
1029 rose_insert_socket(make);
1030
1031 skb_queue_head(&sk->sk_receive_queue, skb);
1032
1033 rose_start_heartbeat(make);
1034
1035 if (!sock_flag(sk, SOCK_DEAD))
1036 sk->sk_data_ready(sk, skb->len);
1037
1038 return 1;
1039}
1040
1041static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1042 struct msghdr *msg, size_t len)
1043{
1044 struct sock *sk = sock->sk;
1045 struct rose_sock *rose = rose_sk(sk);
1046 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1047 int err;
1048 struct full_sockaddr_rose srose;
1049 struct sk_buff *skb;
1050 unsigned char *asmptr;
1051 int n, size, qbit = 0;
1052
1053 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1054 return -EINVAL;
1055
1056 if (sock_flag(sk, SOCK_ZAPPED))
1057 return -EADDRNOTAVAIL;
1058
1059 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1060 send_sig(SIGPIPE, current, 0);
1061 return -EPIPE;
1062 }
1063
1064 if (rose->neighbour == NULL || rose->device == NULL)
1065 return -ENETUNREACH;
1066
1067 if (usrose != NULL) {
1068 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1069 return -EINVAL;
1070 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1071 memcpy(&srose, usrose, msg->msg_namelen);
1072 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1073 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1074 return -EISCONN;
1075 if (srose.srose_ndigis != rose->dest_ndigis)
1076 return -EISCONN;
1077 if (srose.srose_ndigis == rose->dest_ndigis) {
1078 for (n = 0 ; n < srose.srose_ndigis ; n++)
1079 if (ax25cmp(&rose->dest_digis[n],
1080 &srose.srose_digis[n]))
1081 return -EISCONN;
1082 }
1083 if (srose.srose_family != AF_ROSE)
1084 return -EINVAL;
1085 } else {
1086 if (sk->sk_state != TCP_ESTABLISHED)
1087 return -ENOTCONN;
1088
1089 srose.srose_family = AF_ROSE;
1090 srose.srose_addr = rose->dest_addr;
1091 srose.srose_call = rose->dest_call;
1092 srose.srose_ndigis = rose->dest_ndigis;
1093 for (n = 0 ; n < rose->dest_ndigis ; n++)
1094 srose.srose_digis[n] = rose->dest_digis[n];
1095 }
1096
1097 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1098
1099 /* Build a packet */
1100 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1101 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1102
1103 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1104 return err;
1105
1106 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1107
1108 /*
1109 * Put the data on the end
1110 */
1111 SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1112
eeeb0374
ACM		 1113 skb_reset_transport_header(skb);
1114 skb_put(skb, len);
1da177e4 1115
eeeb0374 1116 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1da177e4
LT		 1117 if (err) {
1118 kfree_skb(skb);
1119 return err;
1120 }
1121
1122 /*
1123 * If the Q BIT Include socket option is in force, the first
1124 * byte of the user data is the logical value of the Q Bit.
1125 */
1126 if (rose->qbitincl) {
1127 qbit = skb->data[0];
1128 skb_pull(skb, 1);
1129 }
1130
1131 /*
1132 * Push down the ROSE header
1133 */
1134 asmptr = skb_push(skb, ROSE_MIN_LEN);
1135
1136 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1137
1138 /* Build a ROSE Network header */
1139 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1140 asmptr[1] = (rose->lci >> 0) & 0xFF;
1141 asmptr[2] = ROSE_DATA;
1142
1143 if (qbit)
1144 asmptr[0] |= ROSE_Q_BIT;
1145
1146 SOCK_DEBUG(sk, "ROSE: Built header.\n");
1147
1148 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1149
1150 if (sk->sk_state != TCP_ESTABLISHED) {
1151 kfree_skb(skb);
1152 return -ENOTCONN;
1153 }
1154
1155#ifdef M_BIT
1156#define ROSE_PACLEN (256-ROSE_MIN_LEN)
1157 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1158 unsigned char header[ROSE_MIN_LEN];
1159 struct sk_buff *skbn;
1160 int frontlen;
1161 int lg;
1162
1163 /* Save a copy of the Header */
d626f62b 1164 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1da177e4
LT		 1165 skb_pull(skb, ROSE_MIN_LEN);
1166
1167 frontlen = skb_headroom(skb);
1168
1169 while (skb->len > 0) {
1170 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1171 kfree_skb(skb);
1172 return err;
1173 }
1174
1175 skbn->sk = sk;
1176 skbn->free = 1;
1177 skbn->arp = 1;
1178
1179 skb_reserve(skbn, frontlen);
1180
1181 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1182
1183 /* Copy the user data */
d626f62b 1184 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1da177e4
LT		 1185 skb_pull(skb, lg);
1186
1187 /* Duplicate the Header */
1188 skb_push(skbn, ROSE_MIN_LEN);
27d7ff46 1189 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1da177e4
LT		 1190
1191 if (skb->len > 0)
1192 skbn->data[2] |= M_BIT;
1193
1194 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1195 }
1196
1197 skb->free = 1;
1198 kfree_skb(skb);
1199 } else {
1200 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1201 }
1202#else
1203 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1204#endif
1205
1206 rose_kick(sk);
1207
1208 return len;
1209}
1210
1211
1212static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1213 struct msghdr *msg, size_t size, int flags)
1214{
1215 struct sock *sk = sock->sk;
1216 struct rose_sock *rose = rose_sk(sk);
1217 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1218 size_t copied;
1219 unsigned char *asmptr;
1220 struct sk_buff *skb;
1221 int n, er, qbit;
1222
1223 /*
1224 * This works for seqpacket too. The receiver has ordered the queue for
1225 * us! We do one quick check first though
1226 */
1227 if (sk->sk_state != TCP_ESTABLISHED)
1228 return -ENOTCONN;
1229
1230 /* Now we can treat all alike */
1231 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1232 return er;
1233
1234 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1235
1236 skb_pull(skb, ROSE_MIN_LEN);
1237
1238 if (rose->qbitincl) {
1239 asmptr = skb_push(skb, 1);
1240 *asmptr = qbit;
1241 }
1242
badff6d0 1243 skb_reset_transport_header(skb);
1da177e4
LT		 1244 copied = skb->len;
1245
1246 if (copied > size) {
1247 copied = size;
1248 msg->msg_flags |= MSG_TRUNC;
1249 }
1250
1251 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1252
1253 if (srose != NULL) {
1254 srose->srose_family = AF_ROSE;
1255 srose->srose_addr = rose->dest_addr;
1256 srose->srose_call = rose->dest_call;
1257 srose->srose_ndigis = rose->dest_ndigis;
1258 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1259 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1260 for (n = 0 ; n < rose->dest_ndigis ; n++)
1261 full_srose->srose_digis[n] = rose->dest_digis[n];
1262 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1263 } else {
1264 if (rose->dest_ndigis >= 1) {
1265 srose->srose_ndigis = 1;
1266 srose->srose_digi = rose->dest_digis[0];
1267 }
1268 msg->msg_namelen = sizeof(struct sockaddr_rose);
1269 }
1270 }
1271
1272 skb_free_datagram(sk, skb);
1273
1274 return copied;
1275}
1276
1277
1278static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1279{
1280 struct sock *sk = sock->sk;
1281 struct rose_sock *rose = rose_sk(sk);
1282 void __user *argp = (void __user *)arg;
1283
1284 switch (cmd) {
1285 case TIOCOUTQ: {
1286 long amount;
1287 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1288 if (amount < 0)
1289 amount = 0;
20b7d10a 1290 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1291 }
1292
1293 case TIOCINQ: {
1294 struct sk_buff *skb;
1295 long amount = 0L;
1296 /* These two are safe on a single CPU system as only user tasks fiddle here */
1297 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1298 amount = skb->len;
20b7d10a 1299 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1300 }
1301
1302 case SIOCGSTAMP:
20b7d10a 1303 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1da177e4 1304
ae40eb1e
ED		 1305 case SIOCGSTAMPNS:
1306 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1307
1da177e4
LT		 1308 case SIOCGIFADDR:
1309 case SIOCSIFADDR:
1310 case SIOCGIFDSTADDR:
1311 case SIOCSIFDSTADDR:
1312 case SIOCGIFBRDADDR:
1313 case SIOCSIFBRDADDR:
1314 case SIOCGIFNETMASK:
1315 case SIOCSIFNETMASK:
1316 case SIOCGIFMETRIC:
1317 case SIOCSIFMETRIC:
1318 return -EINVAL;
1319
1320 case SIOCADDRT:
1321 case SIOCDELRT:
1322 case SIOCRSCLRRT:
1323 if (!capable(CAP_NET_ADMIN))
1324 return -EPERM;
1325 return rose_rt_ioctl(cmd, argp);
1326
1327 case SIOCRSGCAUSE: {
1328 struct rose_cause_struct rose_cause;
1329 rose_cause.cause = rose->cause;
1330 rose_cause.diagnostic = rose->diagnostic;
1331 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1332 }
1333
1334 case SIOCRSSCAUSE: {
1335 struct rose_cause_struct rose_cause;
1336 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1337 return -EFAULT;
1338 rose->cause = rose_cause.cause;
1339 rose->diagnostic = rose_cause.diagnostic;
1340 return 0;
1341 }
1342
1343 case SIOCRSSL2CALL:
1344 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1345 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1346 ax25_listen_release(&rose_callsign, NULL);
1347 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1348 return -EFAULT;
1349 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
81dcd169
RB		 1350 return ax25_listen_register(&rose_callsign, NULL);
1351
1da177e4
LT		 1352 return 0;
1353
1354 case SIOCRSGL2CALL:
1355 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1356
1357 case SIOCRSACCEPT:
1358 if (rose->state == ROSE_STATE_5) {
1359 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1360 rose_start_idletimer(sk);
1361 rose->condition = 0x00;
1362 rose->vs = 0;
1363 rose->va = 0;
1364 rose->vr = 0;
1365 rose->vl = 0;
1366 rose->state = ROSE_STATE_3;
1367 }
1368 return 0;
1369
1370 default:
b5e5fa5e 1371 return -ENOIOCTLCMD;
1da177e4
LT		 1372 }
1373
1374 return 0;
1375}
1376
1377#ifdef CONFIG_PROC_FS
1378static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1379{
1380 int i;
1381 struct sock *s;
1382 struct hlist_node *node;
1383
1384 spin_lock_bh(&rose_list_lock);
1385 if (*pos == 0)
1386 return SEQ_START_TOKEN;
3dcf7c5e 1387
1da177e4
LT		 1388 i = 1;
1389 sk_for_each(s, node, &rose_list) {
1390 if (i == *pos)
1391 return s;
1392 ++i;
1393 }
1394 return NULL;
1395}
1396
1397static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1398{
1399 ++*pos;
1400
3dcf7c5e 1401 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1da177e4
LT		 1402 : sk_next((struct sock *)v);
1403}
3dcf7c5e 1404
1da177e4
LT		 1405static void rose_info_stop(struct seq_file *seq, void *v)
1406{
1407 spin_unlock_bh(&rose_list_lock);
1408}
1409
1410static int rose_info_show(struct seq_file *seq, void *v)
1411{
f75268cd
RB		 1412 char buf[11];
1413
1da177e4 1414 if (v == SEQ_START_TOKEN)
3dcf7c5e 1415 seq_puts(seq,
1da177e4
LT		 1416 "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");
1417
1418 else {
1419 struct sock *s = v;
1420 struct rose_sock *rose = rose_sk(s);
1421 const char *devname, *callsign;
1422 const struct net_device *dev = rose->device;
1423
1424 if (!dev)
1425 devname = "???";
1426 else
1427 devname = dev->name;
3dcf7c5e 1428
1da177e4
LT		 1429 seq_printf(seq, "%-10s %-9s ",
1430 rose2asc(&rose->dest_addr),
f75268cd 1431 ax2asc(buf, &rose->dest_call));
1da177e4
LT		 1432
1433 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1434 callsign = "??????-?";
1435 else
f75268cd 1436 callsign = ax2asc(buf, &rose->source_call);
1da177e4
LT		 1437
1438 seq_printf(seq,
1439 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1440 rose2asc(&rose->source_addr),
1441 callsign,
1442 devname,
1443 rose->lci & 0x0FFF,
1444 (rose->neighbour) ? rose->neighbour->number : 0,
1445 rose->state,
1446 rose->vs,
1447 rose->vr,
1448 rose->va,
1449 ax25_display_timer(&rose->timer) / HZ,
1450 rose->t1 / HZ,
1451 rose->t2 / HZ,
1452 rose->t3 / HZ,
1453 rose->hb / HZ,
1454 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1455 rose->idle / (60 * HZ),
1456 atomic_read(&s->sk_wmem_alloc),
1457 atomic_read(&s->sk_rmem_alloc),
1458 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1459 }
1460
1461 return 0;
1462}
1463
56b3d975 1464static const struct seq_operations rose_info_seqops = {
1da177e4
LT		 1465 .start = rose_info_start,
1466 .next = rose_info_next,
1467 .stop = rose_info_stop,
1468 .show = rose_info_show,
1469};
1470
1471static int rose_info_open(struct inode *inode, struct file *file)
1472{
1473 return seq_open(file, &rose_info_seqops);
1474}
1475
da7071d7 1476static const struct file_operations rose_info_fops = {
1da177e4
LT		 1477 .owner = THIS_MODULE,
1478 .open = rose_info_open,
1479 .read = seq_read,
1480 .llseek = seq_lseek,
1481 .release = seq_release,
1482};
1483#endif /* CONFIG_PROC_FS */
1484
1485static struct net_proto_family rose_family_ops = {
1486 .family = PF_ROSE,
1487 .create = rose_create,
1488 .owner = THIS_MODULE,
1489};
1490
1491static struct proto_ops rose_proto_ops = {
1492 .family = PF_ROSE,
1493 .owner = THIS_MODULE,
1494 .release = rose_release,
1495 .bind = rose_bind,
1496 .connect = rose_connect,
1497 .socketpair = sock_no_socketpair,
1498 .accept = rose_accept,
1499 .getname = rose_getname,
1500 .poll = datagram_poll,
1501 .ioctl = rose_ioctl,
1502 .listen = rose_listen,
1503 .shutdown = sock_no_shutdown,
1504 .setsockopt = rose_setsockopt,
1505 .getsockopt = rose_getsockopt,
1506 .sendmsg = rose_sendmsg,
1507 .recvmsg = rose_recvmsg,
1508 .mmap = sock_no_mmap,
1509 .sendpage = sock_no_sendpage,
1510};
1511
1512static struct notifier_block rose_dev_notifier = {
1513 .notifier_call = rose_device_event,
1514};
1515
1516static struct net_device **dev_rose;
1517
8d5cf596
RB		 1518static struct ax25_protocol rose_pid = {
1519 .pid = AX25_P_ROSE,
1520 .func = rose_route_frame
1521};
1522
a4282717
RB		 1523static struct ax25_linkfail rose_linkfail_notifier = {
1524 .func = rose_link_failed
1525};
1526
1da177e4
LT		 1527static int __init rose_proto_init(void)
1528{
1529 int i;
a83cd2cc 1530 int rc;
1da177e4 1531
a83cd2cc
AD		 1532 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1533 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1534 rc = -EINVAL;
1535 goto out;
1536 }
1537
1538 rc = proto_register(&rose_proto, 0);
1da177e4
LT		 1539 if (rc != 0)
1540 goto out;
1541
1542 rose_callsign = null_ax25_address;
1543
1b30dd35 1544 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1da177e4
LT		 1545 if (dev_rose == NULL) {
1546 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
a83cd2cc
AD		 1547 rc = -ENOMEM;
1548 goto out_proto_unregister;
1da177e4
LT		 1549 }
1550
1da177e4
LT		 1551 for (i = 0; i < rose_ndevs; i++) {
1552 struct net_device *dev;
1553 char name[IFNAMSIZ];
1554
1555 sprintf(name, "rose%d", i);
3dcf7c5e 1556 dev = alloc_netdev(sizeof(struct net_device_stats),
1da177e4
LT		 1557 name, rose_setup);
1558 if (!dev) {
1559 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
70ff3b66 1560 rc = -ENOMEM;
1da177e4
LT		 1561 goto fail;
1562 }
70ff3b66
AD		 1563 rc = register_netdev(dev);
1564 if (rc) {
520d1b83 1565 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1da177e4
LT		 1566 free_netdev(dev);
1567 goto fail;
1568 }
b1d21ca8 1569 lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key);
1da177e4
LT		 1570 dev_rose[i] = dev;
1571 }
1572
1573 sock_register(&rose_family_ops);
1574 register_netdevice_notifier(&rose_dev_notifier);
1da177e4 1575
8d5cf596 1576 ax25_register_pid(&rose_pid);
a4282717 1577 ax25_linkfail_register(&rose_linkfail_notifier);
1da177e4
LT		 1578
1579#ifdef CONFIG_SYSCTL
1580 rose_register_sysctl();
1581#endif
1582 rose_loopback_init();
1583
1584 rose_add_loopback_neigh();
1585
457c4cbc
EB		 1586 proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1587 proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1588 proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1589 proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1da177e4
LT		 1590out:
1591 return rc;
1592fail:
1593 while (--i >= 0) {
1594 unregister_netdev(dev_rose[i]);
1595 free_netdev(dev_rose[i]);
1596 }
1597 kfree(dev_rose);
a83cd2cc 1598out_proto_unregister:
1da177e4 1599 proto_unregister(&rose_proto);
70ff3b66 1600 goto out;
1da177e4
LT		 1601}
1602module_init(rose_proto_init);
1603
1604module_param(rose_ndevs, int, 0);
1605MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1606
1607MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1608MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1609MODULE_LICENSE("GPL");
1610MODULE_ALIAS_NETPROTO(PF_ROSE);
1611
1612static void __exit rose_exit(void)
1613{
1614 int i;
1615
457c4cbc
EB		 1616 proc_net_remove(&init_net, "rose");
1617 proc_net_remove(&init_net, "rose_neigh");
1618 proc_net_remove(&init_net, "rose_nodes");
1619 proc_net_remove(&init_net, "rose_routes");
1da177e4
LT		 1620 rose_loopback_clear();
1621
1622 rose_rt_free();
1623
1624 ax25_protocol_release(AX25_P_ROSE);
a4282717 1625 ax25_linkfail_release(&rose_linkfail_notifier);
1da177e4
LT		 1626
1627 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1628 ax25_listen_release(&rose_callsign, NULL);
1629
1630#ifdef CONFIG_SYSCTL
1631 rose_unregister_sysctl();
1632#endif
1633 unregister_netdevice_notifier(&rose_dev_notifier);
1634
1635 sock_unregister(PF_ROSE);
1636
1637 for (i = 0; i < rose_ndevs; i++) {
1638 struct net_device *dev = dev_rose[i];
1639
1640 if (dev) {
1641 unregister_netdev(dev);
1642 free_netdev(dev);
1643 }
1644 }
1645
1646 kfree(dev_rose);
1647 proto_unregister(&rose_proto);
1648}
1649
1650module_exit(rose_exit);
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