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CRED: Wrap task credential accesses in the netrom protocol
[mirror_ubuntu-jammy-kernel.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;
cf508b12 77static struct lock_class_key rose_netdev_addr_lock_key;
b1d21ca8 78
e8a0464c
DM		 79static void rose_set_lockdep_one(struct net_device *dev,
80 struct netdev_queue *txq,
81 void *_unused)
c773e847
DM		 82{
83 lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
84}
85
86static void rose_set_lockdep_key(struct net_device *dev)
87{
cf508b12 88 lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
e8a0464c 89 netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
c773e847
DM		 90}
91
1da177e4
LT		 92/*
93 * Convert a ROSE address into text.
94 */
95const char *rose2asc(const rose_address *addr)
96{
97 static char buffer[11];
98
99 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
100 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
101 addr->rose_addr[4] == 0x00) {
102 strcpy(buffer, "*");
103 } else {
104 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
105 addr->rose_addr[1] & 0xFF,
106 addr->rose_addr[2] & 0xFF,
107 addr->rose_addr[3] & 0xFF,
108 addr->rose_addr[4] & 0xFF);
109 }
110
111 return buffer;
112}
113
114/*
115 * Compare two ROSE addresses, 0 == equal.
116 */
117int rosecmp(rose_address *addr1, rose_address *addr2)
118{
119 int i;
120
121 for (i = 0; i < 5; i++)
122 if (addr1->rose_addr[i] != addr2->rose_addr[i])
123 return 1;
124
125 return 0;
126}
127
128/*
129 * Compare two ROSE addresses for only mask digits, 0 == equal.
130 */
131int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
132{
95b7d924 133 unsigned int i, j;
1da177e4
LT		 134
135 if (mask > 10)
136 return 1;
137
138 for (i = 0; i < mask; i++) {
139 j = i / 2;
140
141 if ((i % 2) != 0) {
142 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
143 return 1;
144 } else {
145 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
146 return 1;
147 }
148 }
149
150 return 0;
151}
152
153/*
154 * Socket removal during an interrupt is now safe.
155 */
156static void rose_remove_socket(struct sock *sk)
157{
158 spin_lock_bh(&rose_list_lock);
159 sk_del_node_init(sk);
160 spin_unlock_bh(&rose_list_lock);
161}
162
163/*
164 * Kill all bound sockets on a broken link layer connection to a
165 * particular neighbour.
166 */
167void rose_kill_by_neigh(struct rose_neigh *neigh)
168{
169 struct sock *s;
170 struct hlist_node *node;
171
172 spin_lock_bh(&rose_list_lock);
173 sk_for_each(s, node, &rose_list) {
174 struct rose_sock *rose = rose_sk(s);
175
176 if (rose->neighbour == neigh) {
177 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
178 rose->neighbour->use--;
179 rose->neighbour = NULL;
180 }
181 }
182 spin_unlock_bh(&rose_list_lock);
183}
184
185/*
186 * Kill all bound sockets on a dropped device.
187 */
188static void rose_kill_by_device(struct net_device *dev)
189{
190 struct sock *s;
191 struct hlist_node *node;
192
193 spin_lock_bh(&rose_list_lock);
194 sk_for_each(s, node, &rose_list) {
195 struct rose_sock *rose = rose_sk(s);
196
197 if (rose->device == dev) {
198 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
199 rose->neighbour->use--;
200 rose->device = NULL;
201 }
202 }
203 spin_unlock_bh(&rose_list_lock);
204}
205
206/*
207 * Handle device status changes.
208 */
209static int rose_device_event(struct notifier_block *this, unsigned long event,
210 void *ptr)
211{
212 struct net_device *dev = (struct net_device *)ptr;
213
721499e8 214 if (!net_eq(dev_net(dev), &init_net))
e9dc8653
EB		 215 return NOTIFY_DONE;
216
1da177e4
LT		 217 if (event != NETDEV_DOWN)
218 return NOTIFY_DONE;
219
220 switch (dev->type) {
221 case ARPHRD_ROSE:
222 rose_kill_by_device(dev);
223 break;
224 case ARPHRD_AX25:
225 rose_link_device_down(dev);
226 rose_rt_device_down(dev);
227 break;
228 }
229
230 return NOTIFY_DONE;
231}
232
233/*
234 * Add a socket to the bound sockets list.
235 */
236static void rose_insert_socket(struct sock *sk)
237{
238
239 spin_lock_bh(&rose_list_lock);
240 sk_add_node(sk, &rose_list);
241 spin_unlock_bh(&rose_list_lock);
242}
243
244/*
245 * Find a socket that wants to accept the Call Request we just
246 * received.
247 */
248static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
249{
250 struct sock *s;
251 struct hlist_node *node;
252
253 spin_lock_bh(&rose_list_lock);
254 sk_for_each(s, node, &rose_list) {
255 struct rose_sock *rose = rose_sk(s);
256
257 if (!rosecmp(&rose->source_addr, addr) &&
258 !ax25cmp(&rose->source_call, call) &&
259 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
260 goto found;
261 }
262
263 sk_for_each(s, node, &rose_list) {
264 struct rose_sock *rose = rose_sk(s);
265
266 if (!rosecmp(&rose->source_addr, addr) &&
267 !ax25cmp(&rose->source_call, &null_ax25_address) &&
268 s->sk_state == TCP_LISTEN)
269 goto found;
270 }
271 s = NULL;
272found:
273 spin_unlock_bh(&rose_list_lock);
274 return s;
275}
276
277/*
278 * Find a connected ROSE socket given my LCI and device.
279 */
280struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
281{
282 struct sock *s;
283 struct hlist_node *node;
284
285 spin_lock_bh(&rose_list_lock);
286 sk_for_each(s, node, &rose_list) {
287 struct rose_sock *rose = rose_sk(s);
288
289 if (rose->lci == lci && rose->neighbour == neigh)
290 goto found;
291 }
292 s = NULL;
293found:
294 spin_unlock_bh(&rose_list_lock);
295 return s;
296}
297
298/*
299 * Find a unique LCI for a given device.
300 */
301unsigned int rose_new_lci(struct rose_neigh *neigh)
302{
303 int lci;
304
305 if (neigh->dce_mode) {
306 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
307 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
308 return lci;
309 } else {
310 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
311 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
312 return lci;
313 }
314
315 return 0;
316}
317
318/*
319 * Deferred destroy.
320 */
321void rose_destroy_socket(struct sock *);
322
323/*
324 * Handler for deferred kills.
325 */
326static void rose_destroy_timer(unsigned long data)
327{
328 rose_destroy_socket((struct sock *)data);
329}
330
331/*
332 * This is called from user mode and the timers. Thus it protects itself
333 * against interrupt users but doesn't worry about being called during
334 * work. Once it is removed from the queue no interrupt or bottom half
335 * will touch it and we are (fairly 8-) ) safe.
336 */
337void rose_destroy_socket(struct sock *sk)
338{
339 struct sk_buff *skb;
340
341 rose_remove_socket(sk);
342 rose_stop_heartbeat(sk);
343 rose_stop_idletimer(sk);
344 rose_stop_timer(sk);
345
346 rose_clear_queues(sk); /* Flush the queues */
347
348 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
349 if (skb->sk != sk) { /* A pending connection */
350 /* Queue the unaccepted socket for death */
351 sock_set_flag(skb->sk, SOCK_DEAD);
352 rose_start_heartbeat(skb->sk);
353 rose_sk(skb->sk)->state = ROSE_STATE_0;
354 }
355
356 kfree_skb(skb);
357 }
358
359 if (atomic_read(&sk->sk_wmem_alloc) ||
360 atomic_read(&sk->sk_rmem_alloc)) {
361 /* Defer: outstanding buffers */
b24b8a24
PE		 362 setup_timer(&sk->sk_timer, rose_destroy_timer,
363 (unsigned long)sk);
1da177e4 364 sk->sk_timer.expires = jiffies + 10 * HZ;
1da177e4
LT		 365 add_timer(&sk->sk_timer);
366 } else
367 sock_put(sk);
368}
369
370/*
371 * Handling for system calls applied via the various interfaces to a
372 * ROSE socket object.
373 */
374
375static int rose_setsockopt(struct socket *sock, int level, int optname,
376 char __user *optval, int optlen)
377{
378 struct sock *sk = sock->sk;
379 struct rose_sock *rose = rose_sk(sk);
380 int opt;
381
382 if (level != SOL_ROSE)
383 return -ENOPROTOOPT;
384
385 if (optlen < sizeof(int))
386 return -EINVAL;
387
388 if (get_user(opt, (int __user *)optval))
389 return -EFAULT;
390
391 switch (optname) {
392 case ROSE_DEFER:
393 rose->defer = opt ? 1 : 0;
394 return 0;
395
396 case ROSE_T1:
397 if (opt < 1)
398 return -EINVAL;
399 rose->t1 = opt * HZ;
400 return 0;
401
402 case ROSE_T2:
403 if (opt < 1)
404 return -EINVAL;
405 rose->t2 = opt * HZ;
406 return 0;
407
408 case ROSE_T3:
409 if (opt < 1)
410 return -EINVAL;
411 rose->t3 = opt * HZ;
412 return 0;
413
414 case ROSE_HOLDBACK:
415 if (opt < 1)
416 return -EINVAL;
417 rose->hb = opt * HZ;
418 return 0;
419
420 case ROSE_IDLE:
421 if (opt < 0)
422 return -EINVAL;
423 rose->idle = opt * 60 * HZ;
424 return 0;
425
426 case ROSE_QBITINCL:
427 rose->qbitincl = opt ? 1 : 0;
428 return 0;
429
430 default:
431 return -ENOPROTOOPT;
432 }
433}
434
435static int rose_getsockopt(struct socket *sock, int level, int optname,
436 char __user *optval, int __user *optlen)
437{
438 struct sock *sk = sock->sk;
439 struct rose_sock *rose = rose_sk(sk);
440 int val = 0;
441 int len;
442
443 if (level != SOL_ROSE)
444 return -ENOPROTOOPT;
445
446 if (get_user(len, optlen))
447 return -EFAULT;
448
449 if (len < 0)
450 return -EINVAL;
451
452 switch (optname) {
453 case ROSE_DEFER:
454 val = rose->defer;
455 break;
456
457 case ROSE_T1:
458 val = rose->t1 / HZ;
459 break;
460
461 case ROSE_T2:
462 val = rose->t2 / HZ;
463 break;
464
465 case ROSE_T3:
466 val = rose->t3 / HZ;
467 break;
468
469 case ROSE_HOLDBACK:
470 val = rose->hb / HZ;
471 break;
472
473 case ROSE_IDLE:
474 val = rose->idle / (60 * HZ);
475 break;
476
477 case ROSE_QBITINCL:
478 val = rose->qbitincl;
479 break;
480
481 default:
482 return -ENOPROTOOPT;
483 }
484
485 len = min_t(unsigned int, len, sizeof(int));
486
487 if (put_user(len, optlen))
488 return -EFAULT;
489
490 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
491}
492
493static int rose_listen(struct socket *sock, int backlog)
494{
495 struct sock *sk = sock->sk;
496
497 if (sk->sk_state != TCP_LISTEN) {
498 struct rose_sock *rose = rose_sk(sk);
499
500 rose->dest_ndigis = 0;
501 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
502 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
503 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
504 sk->sk_max_ack_backlog = backlog;
505 sk->sk_state = TCP_LISTEN;
506 return 0;
507 }
508
509 return -EOPNOTSUPP;
510}
511
512static struct proto rose_proto = {
513 .name = "ROSE",
514 .owner = THIS_MODULE,
515 .obj_size = sizeof(struct rose_sock),
516};
517
1b8d7ae4 518static int rose_create(struct net *net, struct socket *sock, int protocol)
1da177e4
LT		 519{
520 struct sock *sk;
521 struct rose_sock *rose;
522
1b8d7ae4
EB		 523 if (net != &init_net)
524 return -EAFNOSUPPORT;
525
1da177e4
LT		 526 if (sock->type != SOCK_SEQPACKET || protocol != 0)
527 return -ESOCKTNOSUPPORT;
528
6257ff21
PE		 529 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
530 if (sk == NULL)
1da177e4
LT		 531 return -ENOMEM;
532
533 rose = rose_sk(sk);
534
535 sock_init_data(sock, sk);
536
537 skb_queue_head_init(&rose->ack_queue);
538#ifdef M_BIT
539 skb_queue_head_init(&rose->frag_queue);
540 rose->fraglen = 0;
541#endif
542
543 sock->ops = &rose_proto_ops;
544 sk->sk_protocol = protocol;
545
546 init_timer(&rose->timer);
547 init_timer(&rose->idletimer);
548
82e84249
RB		 549 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
550 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
551 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
552 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
553 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
1da177e4
LT		 554
555 rose->state = ROSE_STATE_0;
556
557 return 0;
558}
559
560static struct sock *rose_make_new(struct sock *osk)
561{
562 struct sock *sk;
563 struct rose_sock *rose, *orose;
564
565 if (osk->sk_type != SOCK_SEQPACKET)
566 return NULL;
567
3b1e0a65 568 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto);
6257ff21 569 if (sk == NULL)
1da177e4
LT		 570 return NULL;
571
572 rose = rose_sk(sk);
573
574 sock_init_data(NULL, sk);
575
576 skb_queue_head_init(&rose->ack_queue);
577#ifdef M_BIT
578 skb_queue_head_init(&rose->frag_queue);
579 rose->fraglen = 0;
580#endif
581
582 sk->sk_type = osk->sk_type;
1da177e4
LT		 583 sk->sk_priority = osk->sk_priority;
584 sk->sk_protocol = osk->sk_protocol;
585 sk->sk_rcvbuf = osk->sk_rcvbuf;
586 sk->sk_sndbuf = osk->sk_sndbuf;
587 sk->sk_state = TCP_ESTABLISHED;
53b924b3 588 sock_copy_flags(sk, osk);
1da177e4
LT		 589
590 init_timer(&rose->timer);
591 init_timer(&rose->idletimer);
592
593 orose = rose_sk(osk);
594 rose->t1 = orose->t1;
595 rose->t2 = orose->t2;
596 rose->t3 = orose->t3;
597 rose->hb = orose->hb;
598 rose->idle = orose->idle;
599 rose->defer = orose->defer;
600 rose->device = orose->device;
601 rose->qbitincl = orose->qbitincl;
602
603 return sk;
604}
605
606static int rose_release(struct socket *sock)
607{
608 struct sock *sk = sock->sk;
609 struct rose_sock *rose;
610
611 if (sk == NULL) return 0;
612
4965291a
JP		 613 sock_hold(sk);
614 sock_orphan(sk);
615 lock_sock(sk);
1da177e4
LT		 616 rose = rose_sk(sk);
617
618 switch (rose->state) {
619 case ROSE_STATE_0:
4965291a 620 release_sock(sk);
1da177e4 621 rose_disconnect(sk, 0, -1, -1);
4965291a 622 lock_sock(sk);
1da177e4
LT		 623 rose_destroy_socket(sk);
624 break;
625
626 case ROSE_STATE_2:
627 rose->neighbour->use--;
4965291a 628 release_sock(sk);
1da177e4 629 rose_disconnect(sk, 0, -1, -1);
4965291a 630 lock_sock(sk);
1da177e4
LT		 631 rose_destroy_socket(sk);
632 break;
633
634 case ROSE_STATE_1:
635 case ROSE_STATE_3:
636 case ROSE_STATE_4:
637 case ROSE_STATE_5:
638 rose_clear_queues(sk);
639 rose_stop_idletimer(sk);
640 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
641 rose_start_t3timer(sk);
642 rose->state = ROSE_STATE_2;
643 sk->sk_state = TCP_CLOSE;
644 sk->sk_shutdown |= SEND_SHUTDOWN;
645 sk->sk_state_change(sk);
646 sock_set_flag(sk, SOCK_DEAD);
647 sock_set_flag(sk, SOCK_DESTROY);
648 break;
649
650 default:
651 break;
652 }
653
654 sock->sk = NULL;
4965291a
JP		 655 release_sock(sk);
656 sock_put(sk);
1da177e4
LT		 657
658 return 0;
659}
660
661static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
662{
663 struct sock *sk = sock->sk;
664 struct rose_sock *rose = rose_sk(sk);
665 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
666 struct net_device *dev;
01d7dd0e
RB		 667 ax25_address *source;
668 ax25_uid_assoc *user;
1da177e4
LT		 669 int n;
670
671 if (!sock_flag(sk, SOCK_ZAPPED))
672 return -EINVAL;
673
674 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
675 return -EINVAL;
676
677 if (addr->srose_family != AF_ROSE)
678 return -EINVAL;
679
680 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
681 return -EINVAL;
682
683 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
684 return -EINVAL;
685
686 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
687 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
688 return -EADDRNOTAVAIL;
689 }
690
691 source = &addr->srose_call;
692
01d7dd0e
RB		 693 user = ax25_findbyuid(current->euid);
694 if (user) {
695 rose->source_call = user->call;
696 ax25_uid_put(user);
697 } else {
1da177e4
LT		 698 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
699 return -EACCES;
01d7dd0e 700 rose->source_call = *source;
1da177e4
LT		 701 }
702
703 rose->source_addr = addr->srose_addr;
1da177e4
LT		 704 rose->device = dev;
705 rose->source_ndigis = addr->srose_ndigis;
706
707 if (addr_len == sizeof(struct full_sockaddr_rose)) {
708 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
709 for (n = 0 ; n < addr->srose_ndigis ; n++)
710 rose->source_digis[n] = full_addr->srose_digis[n];
711 } else {
712 if (rose->source_ndigis == 1) {
713 rose->source_digis[0] = addr->srose_digi;
714 }
715 }
716
717 rose_insert_socket(sk);
718
719 sock_reset_flag(sk, SOCK_ZAPPED);
720 SOCK_DEBUG(sk, "ROSE: socket is bound\n");
721 return 0;
722}
723
724static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
725{
726 struct sock *sk = sock->sk;
727 struct rose_sock *rose = rose_sk(sk);
728 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
729 unsigned char cause, diagnostic;
1da177e4 730 struct net_device *dev;
01d7dd0e 731 ax25_uid_assoc *user;
2536b94a 732 int n, err = 0;
1da177e4
LT		 733
734 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
735 return -EINVAL;
736
737 if (addr->srose_family != AF_ROSE)
738 return -EINVAL;
739
740 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
741 return -EINVAL;
742
743 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
744 return -EINVAL;
745
746 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
747 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
748 return -EINVAL;
749
2536b94a
RB		 750 lock_sock(sk);
751
752 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
753 /* Connect completed during a ERESTARTSYS event */
754 sock->state = SS_CONNECTED;
755 goto out_release;
756 }
757
758 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
759 sock->state = SS_UNCONNECTED;
760 err = -ECONNREFUSED;
761 goto out_release;
762 }
763
764 if (sk->sk_state == TCP_ESTABLISHED) {
765 /* No reconnect on a seqpacket socket */
766 err = -EISCONN;
767 goto out_release;
768 }
769
770 sk->sk_state = TCP_CLOSE;
771 sock->state = SS_UNCONNECTED;
772
1da177e4 773 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
fe2c802a 774 &diagnostic, 0);
43837b1e
BP		 775 if (!rose->neighbour) {
776 err = -ENETUNREACH;
777 goto out_release;
778 }
1da177e4
LT		 779
780 rose->lci = rose_new_lci(rose->neighbour);
2536b94a
RB		 781 if (!rose->lci) {
782 err = -ENETUNREACH;
783 goto out_release;
784 }
1da177e4
LT		 785
786 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
787 sock_reset_flag(sk, SOCK_ZAPPED);
788
2536b94a
RB		 789 if ((dev = rose_dev_first()) == NULL) {
790 err = -ENETUNREACH;
791 goto out_release;
792 }
1da177e4 793
01d7dd0e 794 user = ax25_findbyuid(current->euid);
2536b94a
RB		 795 if (!user) {
796 err = -EINVAL;
797 goto out_release;
798 }
1da177e4
LT		 799
800 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
01d7dd0e 801 rose->source_call = user->call;
1da177e4 802 rose->device = dev;
01d7dd0e 803 ax25_uid_put(user);
1da177e4
LT		 804
805 rose_insert_socket(sk); /* Finish the bind */
806 }
d85838c5 807rose_try_next_neigh:
1da177e4
LT		 808 rose->dest_addr = addr->srose_addr;
809 rose->dest_call = addr->srose_call;
810 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
811 rose->dest_ndigis = addr->srose_ndigis;
812
813 if (addr_len == sizeof(struct full_sockaddr_rose)) {
814 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
815 for (n = 0 ; n < addr->srose_ndigis ; n++)
816 rose->dest_digis[n] = full_addr->srose_digis[n];
817 } else {
818 if (rose->dest_ndigis == 1) {
819 rose->dest_digis[0] = addr->srose_digi;
820 }
821 }
822
823 /* Move to connecting socket, start sending Connect Requests */
824 sock->state = SS_CONNECTING;
825 sk->sk_state = TCP_SYN_SENT;
826
827 rose->state = ROSE_STATE_1;
828
829 rose->neighbour->use++;
830
831 rose_write_internal(sk, ROSE_CALL_REQUEST);
832 rose_start_heartbeat(sk);
833 rose_start_t1timer(sk);
834
835 /* Now the loop */
2536b94a
RB		 836 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
837 err = -EINPROGRESS;
838 goto out_release;
839 }
1da177e4
LT		 840
841 /*
842 * A Connect Ack with Choke or timeout or failed routing will go to
843 * closed.
844 */
845 if (sk->sk_state == TCP_SYN_SENT) {
75606dc6 846 DEFINE_WAIT(wait);
1da177e4 847
1da177e4 848 for (;;) {
75606dc6 849 prepare_to_wait(sk->sk_sleep, &wait,
6140efb5 850 TASK_INTERRUPTIBLE);
1da177e4
LT		 851 if (sk->sk_state != TCP_SYN_SENT)
852 break;
75606dc6
RB		 853 if (!signal_pending(current)) {
854 release_sock(sk);
1da177e4 855 schedule();
2536b94a 856 lock_sock(sk);
1da177e4
LT		 857 continue;
858 }
75606dc6
RB		 859 err = -ERESTARTSYS;
860 break;
1da177e4 861 }
75606dc6
RB		 862 finish_wait(sk->sk_sleep, &wait);
863
864 if (err)
865 goto out_release;
1da177e4
LT		 866 }
867
868 if (sk->sk_state != TCP_ESTABLISHED) {
d85838c5 869 /* Try next neighbour */
fe2c802a 870 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic, 0);
d85838c5
RB		 871 if (rose->neighbour)
872 goto rose_try_next_neigh;
2536b94a
RB		 873
874 /* No more neighbours */
1da177e4 875 sock->state = SS_UNCONNECTED;
2536b94a
RB		 876 err = sock_error(sk); /* Always set at this point */
877 goto out_release;
1da177e4
LT		 878 }
879
880 sock->state = SS_CONNECTED;
881
2536b94a
RB		 882out_release:
883 release_sock(sk);
884
885 return err;
1da177e4
LT		 886}
887
888static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
889{
1da177e4
LT		 890 struct sk_buff *skb;
891 struct sock *newsk;
75606dc6 892 DEFINE_WAIT(wait);
1da177e4
LT		 893 struct sock *sk;
894 int err = 0;
895
896 if ((sk = sock->sk) == NULL)
897 return -EINVAL;
898
899 lock_sock(sk);
900 if (sk->sk_type != SOCK_SEQPACKET) {
901 err = -EOPNOTSUPP;
75606dc6 902 goto out_release;
1da177e4
LT		 903 }
904
905 if (sk->sk_state != TCP_LISTEN) {
906 err = -EINVAL;
75606dc6 907 goto out_release;
1da177e4
LT		 908 }
909
910 /*
911 * The write queue this time is holding sockets ready to use
912 * hooked into the SABM we saved
913 */
1da177e4 914 for (;;) {
75606dc6
RB		 915 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
916
1da177e4
LT		 917 skb = skb_dequeue(&sk->sk_receive_queue);
918 if (skb)
919 break;
920
1da177e4 921 if (flags & O_NONBLOCK) {
75606dc6
RB		 922 err = -EWOULDBLOCK;
923 break;
1da177e4 924 }
75606dc6
RB		 925 if (!signal_pending(current)) {
926 release_sock(sk);
1da177e4
LT		 927 schedule();
928 lock_sock(sk);
929 continue;
930 }
75606dc6
RB		 931 err = -ERESTARTSYS;
932 break;
1da177e4 933 }
75606dc6
RB		 934 finish_wait(sk->sk_sleep, &wait);
935 if (err)
936 goto out_release;
1da177e4
LT		 937
938 newsk = skb->sk;
44ccff1f 939 sock_graft(newsk, newsock);
1da177e4
LT		 940
941 /* Now attach up the new socket */
942 skb->sk = NULL;
943 kfree_skb(skb);
944 sk->sk_ack_backlog--;
1da177e4 945
75606dc6 946out_release:
1da177e4
LT		 947 release_sock(sk);
948
949 return err;
950}
951
952static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
953 int *uaddr_len, int peer)
954{
955 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
956 struct sock *sk = sock->sk;
957 struct rose_sock *rose = rose_sk(sk);
958 int n;
959
960 if (peer != 0) {
961 if (sk->sk_state != TCP_ESTABLISHED)
962 return -ENOTCONN;
963 srose->srose_family = AF_ROSE;
964 srose->srose_addr = rose->dest_addr;
965 srose->srose_call = rose->dest_call;
966 srose->srose_ndigis = rose->dest_ndigis;
967 for (n = 0; n < rose->dest_ndigis; n++)
968 srose->srose_digis[n] = rose->dest_digis[n];
969 } else {
970 srose->srose_family = AF_ROSE;
971 srose->srose_addr = rose->source_addr;
972 srose->srose_call = rose->source_call;
973 srose->srose_ndigis = rose->source_ndigis;
974 for (n = 0; n < rose->source_ndigis; n++)
975 srose->srose_digis[n] = rose->source_digis[n];
976 }
977
978 *uaddr_len = sizeof(struct full_sockaddr_rose);
979 return 0;
980}
981
982int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
983{
984 struct sock *sk;
985 struct sock *make;
986 struct rose_sock *make_rose;
987 struct rose_facilities_struct facilities;
988 int n, len;
989
990 skb->sk = NULL; /* Initially we don't know who it's for */
991
992 /*
993 * skb->data points to the rose frame start
994 */
995 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
996
95b7d924
ED		 997 len = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
998 len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
1da177e4
LT		 999 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
1000 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
1001 return 0;
1002 }
1003
1004 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1005
1006 /*
1007 * We can't accept the Call Request.
1008 */
1009 if (sk == NULL || sk_acceptq_is_full(sk) ||
1010 (make = rose_make_new(sk)) == NULL) {
1011 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1012 return 0;
1013 }
1014
1015 skb->sk = make;
1016 make->sk_state = TCP_ESTABLISHED;
1017 make_rose = rose_sk(make);
1018
1019 make_rose->lci = lci;
1020 make_rose->dest_addr = facilities.dest_addr;
1021 make_rose->dest_call = facilities.dest_call;
1022 make_rose->dest_ndigis = facilities.dest_ndigis;
1023 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1024 make_rose->dest_digis[n] = facilities.dest_digis[n];
1025 make_rose->source_addr = facilities.source_addr;
1026 make_rose->source_call = facilities.source_call;
1027 make_rose->source_ndigis = facilities.source_ndigis;
1028 for (n = 0 ; n < facilities.source_ndigis ; n++)
1029 make_rose->source_digis[n]= facilities.source_digis[n];
1030 make_rose->neighbour = neigh;
1031 make_rose->device = dev;
1032 make_rose->facilities = facilities;
1033
1034 make_rose->neighbour->use++;
1035
1036 if (rose_sk(sk)->defer) {
1037 make_rose->state = ROSE_STATE_5;
1038 } else {
1039 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1040 make_rose->state = ROSE_STATE_3;
1041 rose_start_idletimer(make);
1042 }
1043
1044 make_rose->condition = 0x00;
1045 make_rose->vs = 0;
1046 make_rose->va = 0;
1047 make_rose->vr = 0;
1048 make_rose->vl = 0;
1049 sk->sk_ack_backlog++;
1050
1051 rose_insert_socket(make);
1052
1053 skb_queue_head(&sk->sk_receive_queue, skb);
1054
1055 rose_start_heartbeat(make);
1056
1057 if (!sock_flag(sk, SOCK_DEAD))
1058 sk->sk_data_ready(sk, skb->len);
1059
1060 return 1;
1061}
1062
1063static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1064 struct msghdr *msg, size_t len)
1065{
1066 struct sock *sk = sock->sk;
1067 struct rose_sock *rose = rose_sk(sk);
1068 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1069 int err;
1070 struct full_sockaddr_rose srose;
1071 struct sk_buff *skb;
1072 unsigned char *asmptr;
1073 int n, size, qbit = 0;
1074
1075 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1076 return -EINVAL;
1077
1078 if (sock_flag(sk, SOCK_ZAPPED))
1079 return -EADDRNOTAVAIL;
1080
1081 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1082 send_sig(SIGPIPE, current, 0);
1083 return -EPIPE;
1084 }
1085
1086 if (rose->neighbour == NULL || rose->device == NULL)
1087 return -ENETUNREACH;
1088
1089 if (usrose != NULL) {
1090 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1091 return -EINVAL;
1092 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1093 memcpy(&srose, usrose, msg->msg_namelen);
1094 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1095 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1096 return -EISCONN;
1097 if (srose.srose_ndigis != rose->dest_ndigis)
1098 return -EISCONN;
1099 if (srose.srose_ndigis == rose->dest_ndigis) {
1100 for (n = 0 ; n < srose.srose_ndigis ; n++)
1101 if (ax25cmp(&rose->dest_digis[n],
1102 &srose.srose_digis[n]))
1103 return -EISCONN;
1104 }
1105 if (srose.srose_family != AF_ROSE)
1106 return -EINVAL;
1107 } else {
1108 if (sk->sk_state != TCP_ESTABLISHED)
1109 return -ENOTCONN;
1110
1111 srose.srose_family = AF_ROSE;
1112 srose.srose_addr = rose->dest_addr;
1113 srose.srose_call = rose->dest_call;
1114 srose.srose_ndigis = rose->dest_ndigis;
1115 for (n = 0 ; n < rose->dest_ndigis ; n++)
1116 srose.srose_digis[n] = rose->dest_digis[n];
1117 }
1118
1119 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1120
1121 /* Build a packet */
1122 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1123 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1124
1125 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1126 return err;
1127
1128 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1129
1130 /*
1131 * Put the data on the end
1132 */
1133 SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1134
eeeb0374
ACM		 1135 skb_reset_transport_header(skb);
1136 skb_put(skb, len);
1da177e4 1137
eeeb0374 1138 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1da177e4
LT		 1139 if (err) {
1140 kfree_skb(skb);
1141 return err;
1142 }
1143
1144 /*
1145 * If the Q BIT Include socket option is in force, the first
1146 * byte of the user data is the logical value of the Q Bit.
1147 */
1148 if (rose->qbitincl) {
1149 qbit = skb->data[0];
1150 skb_pull(skb, 1);
1151 }
1152
1153 /*
1154 * Push down the ROSE header
1155 */
1156 asmptr = skb_push(skb, ROSE_MIN_LEN);
1157
1158 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1159
1160 /* Build a ROSE Network header */
1161 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1162 asmptr[1] = (rose->lci >> 0) & 0xFF;
1163 asmptr[2] = ROSE_DATA;
1164
1165 if (qbit)
1166 asmptr[0] |= ROSE_Q_BIT;
1167
1168 SOCK_DEBUG(sk, "ROSE: Built header.\n");
1169
1170 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1171
1172 if (sk->sk_state != TCP_ESTABLISHED) {
1173 kfree_skb(skb);
1174 return -ENOTCONN;
1175 }
1176
1177#ifdef M_BIT
1178#define ROSE_PACLEN (256-ROSE_MIN_LEN)
1179 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1180 unsigned char header[ROSE_MIN_LEN];
1181 struct sk_buff *skbn;
1182 int frontlen;
1183 int lg;
1184
1185 /* Save a copy of the Header */
d626f62b 1186 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1da177e4
LT		 1187 skb_pull(skb, ROSE_MIN_LEN);
1188
1189 frontlen = skb_headroom(skb);
1190
1191 while (skb->len > 0) {
1192 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1193 kfree_skb(skb);
1194 return err;
1195 }
1196
1197 skbn->sk = sk;
1198 skbn->free = 1;
1199 skbn->arp = 1;
1200
1201 skb_reserve(skbn, frontlen);
1202
1203 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1204
1205 /* Copy the user data */
d626f62b 1206 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1da177e4
LT		 1207 skb_pull(skb, lg);
1208
1209 /* Duplicate the Header */
1210 skb_push(skbn, ROSE_MIN_LEN);
27d7ff46 1211 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1da177e4
LT		 1212
1213 if (skb->len > 0)
1214 skbn->data[2] |= M_BIT;
1215
1216 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1217 }
1218
1219 skb->free = 1;
1220 kfree_skb(skb);
1221 } else {
1222 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1223 }
1224#else
1225 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1226#endif
1227
1228 rose_kick(sk);
1229
1230 return len;
1231}
1232
1233
1234static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1235 struct msghdr *msg, size_t size, int flags)
1236{
1237 struct sock *sk = sock->sk;
1238 struct rose_sock *rose = rose_sk(sk);
1239 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1240 size_t copied;
1241 unsigned char *asmptr;
1242 struct sk_buff *skb;
1243 int n, er, qbit;
1244
1245 /*
1246 * This works for seqpacket too. The receiver has ordered the queue for
1247 * us! We do one quick check first though
1248 */
1249 if (sk->sk_state != TCP_ESTABLISHED)
1250 return -ENOTCONN;
1251
1252 /* Now we can treat all alike */
1253 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1254 return er;
1255
1256 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1257
1258 skb_pull(skb, ROSE_MIN_LEN);
1259
1260 if (rose->qbitincl) {
1261 asmptr = skb_push(skb, 1);
1262 *asmptr = qbit;
1263 }
1264
badff6d0 1265 skb_reset_transport_header(skb);
1da177e4
LT		 1266 copied = skb->len;
1267
1268 if (copied > size) {
1269 copied = size;
1270 msg->msg_flags |= MSG_TRUNC;
1271 }
1272
1273 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1274
1275 if (srose != NULL) {
1276 srose->srose_family = AF_ROSE;
1277 srose->srose_addr = rose->dest_addr;
1278 srose->srose_call = rose->dest_call;
1279 srose->srose_ndigis = rose->dest_ndigis;
1280 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1281 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1282 for (n = 0 ; n < rose->dest_ndigis ; n++)
1283 full_srose->srose_digis[n] = rose->dest_digis[n];
1284 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1285 } else {
1286 if (rose->dest_ndigis >= 1) {
1287 srose->srose_ndigis = 1;
1288 srose->srose_digi = rose->dest_digis[0];
1289 }
1290 msg->msg_namelen = sizeof(struct sockaddr_rose);
1291 }
1292 }
1293
1294 skb_free_datagram(sk, skb);
1295
1296 return copied;
1297}
1298
1299
1300static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1301{
1302 struct sock *sk = sock->sk;
1303 struct rose_sock *rose = rose_sk(sk);
1304 void __user *argp = (void __user *)arg;
1305
1306 switch (cmd) {
1307 case TIOCOUTQ: {
1308 long amount;
1309 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1310 if (amount < 0)
1311 amount = 0;
20b7d10a 1312 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1313 }
1314
1315 case TIOCINQ: {
1316 struct sk_buff *skb;
1317 long amount = 0L;
1318 /* These two are safe on a single CPU system as only user tasks fiddle here */
1319 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1320 amount = skb->len;
20b7d10a 1321 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1322 }
1323
1324 case SIOCGSTAMP:
20b7d10a 1325 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1da177e4 1326
ae40eb1e
ED		 1327 case SIOCGSTAMPNS:
1328 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1329
1da177e4
LT		 1330 case SIOCGIFADDR:
1331 case SIOCSIFADDR:
1332 case SIOCGIFDSTADDR:
1333 case SIOCSIFDSTADDR:
1334 case SIOCGIFBRDADDR:
1335 case SIOCSIFBRDADDR:
1336 case SIOCGIFNETMASK:
1337 case SIOCSIFNETMASK:
1338 case SIOCGIFMETRIC:
1339 case SIOCSIFMETRIC:
1340 return -EINVAL;
1341
1342 case SIOCADDRT:
1343 case SIOCDELRT:
1344 case SIOCRSCLRRT:
1345 if (!capable(CAP_NET_ADMIN))
1346 return -EPERM;
1347 return rose_rt_ioctl(cmd, argp);
1348
1349 case SIOCRSGCAUSE: {
1350 struct rose_cause_struct rose_cause;
1351 rose_cause.cause = rose->cause;
1352 rose_cause.diagnostic = rose->diagnostic;
1353 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1354 }
1355
1356 case SIOCRSSCAUSE: {
1357 struct rose_cause_struct rose_cause;
1358 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1359 return -EFAULT;
1360 rose->cause = rose_cause.cause;
1361 rose->diagnostic = rose_cause.diagnostic;
1362 return 0;
1363 }
1364
1365 case SIOCRSSL2CALL:
1366 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1367 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1368 ax25_listen_release(&rose_callsign, NULL);
1369 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1370 return -EFAULT;
1371 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
81dcd169
RB		 1372 return ax25_listen_register(&rose_callsign, NULL);
1373
1da177e4
LT		 1374 return 0;
1375
1376 case SIOCRSGL2CALL:
1377 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1378
1379 case SIOCRSACCEPT:
1380 if (rose->state == ROSE_STATE_5) {
1381 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1382 rose_start_idletimer(sk);
1383 rose->condition = 0x00;
1384 rose->vs = 0;
1385 rose->va = 0;
1386 rose->vr = 0;
1387 rose->vl = 0;
1388 rose->state = ROSE_STATE_3;
1389 }
1390 return 0;
1391
1392 default:
b5e5fa5e 1393 return -ENOIOCTLCMD;
1da177e4
LT		 1394 }
1395
1396 return 0;
1397}
1398
1399#ifdef CONFIG_PROC_FS
1400static void *rose_info_start(struct seq_file *seq, loff_t *pos)
95b7d924 1401 __acquires(rose_list_lock)
1da177e4
LT		 1402{
1403 int i;
1404 struct sock *s;
1405 struct hlist_node *node;
1406
1407 spin_lock_bh(&rose_list_lock);
1408 if (*pos == 0)
1409 return SEQ_START_TOKEN;
3dcf7c5e 1410
1da177e4
LT		 1411 i = 1;
1412 sk_for_each(s, node, &rose_list) {
1413 if (i == *pos)
1414 return s;
1415 ++i;
1416 }
1417 return NULL;
1418}
1419
1420static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1421{
1422 ++*pos;
1423
3dcf7c5e 1424 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1da177e4
LT		 1425 : sk_next((struct sock *)v);
1426}
3dcf7c5e 1427
1da177e4 1428static void rose_info_stop(struct seq_file *seq, void *v)
95b7d924 1429 __releases(rose_list_lock)
1da177e4
LT		 1430{
1431 spin_unlock_bh(&rose_list_lock);
1432}
1433
1434static int rose_info_show(struct seq_file *seq, void *v)
1435{
f75268cd
RB		 1436 char buf[11];
1437
1da177e4 1438 if (v == SEQ_START_TOKEN)
3dcf7c5e 1439 seq_puts(seq,
1da177e4
LT		 1440 "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");
1441
1442 else {
1443 struct sock *s = v;
1444 struct rose_sock *rose = rose_sk(s);
1445 const char *devname, *callsign;
1446 const struct net_device *dev = rose->device;
1447
1448 if (!dev)
1449 devname = "???";
1450 else
1451 devname = dev->name;
3dcf7c5e 1452
1da177e4
LT		 1453 seq_printf(seq, "%-10s %-9s ",
1454 rose2asc(&rose->dest_addr),
f75268cd 1455 ax2asc(buf, &rose->dest_call));
1da177e4
LT		 1456
1457 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1458 callsign = "??????-?";
1459 else
f75268cd 1460 callsign = ax2asc(buf, &rose->source_call);
1da177e4
LT		 1461
1462 seq_printf(seq,
1463 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1464 rose2asc(&rose->source_addr),
1465 callsign,
1466 devname,
1467 rose->lci & 0x0FFF,
1468 (rose->neighbour) ? rose->neighbour->number : 0,
1469 rose->state,
1470 rose->vs,
1471 rose->vr,
1472 rose->va,
1473 ax25_display_timer(&rose->timer) / HZ,
1474 rose->t1 / HZ,
1475 rose->t2 / HZ,
1476 rose->t3 / HZ,
1477 rose->hb / HZ,
1478 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1479 rose->idle / (60 * HZ),
1480 atomic_read(&s->sk_wmem_alloc),
1481 atomic_read(&s->sk_rmem_alloc),
1482 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1483 }
1484
1485 return 0;
1486}
1487
56b3d975 1488static const struct seq_operations rose_info_seqops = {
1da177e4
LT		 1489 .start = rose_info_start,
1490 .next = rose_info_next,
1491 .stop = rose_info_stop,
1492 .show = rose_info_show,
1493};
1494
1495static int rose_info_open(struct inode *inode, struct file *file)
1496{
1497 return seq_open(file, &rose_info_seqops);
1498}
1499
da7071d7 1500static const struct file_operations rose_info_fops = {
1da177e4
LT		 1501 .owner = THIS_MODULE,
1502 .open = rose_info_open,
1503 .read = seq_read,
1504 .llseek = seq_lseek,
1505 .release = seq_release,
1506};
1507#endif /* CONFIG_PROC_FS */
1508
1509static struct net_proto_family rose_family_ops = {
1510 .family = PF_ROSE,
1511 .create = rose_create,
1512 .owner = THIS_MODULE,
1513};
1514
1515static struct proto_ops rose_proto_ops = {
1516 .family = PF_ROSE,
1517 .owner = THIS_MODULE,
1518 .release = rose_release,
1519 .bind = rose_bind,
1520 .connect = rose_connect,
1521 .socketpair = sock_no_socketpair,
1522 .accept = rose_accept,
1523 .getname = rose_getname,
1524 .poll = datagram_poll,
1525 .ioctl = rose_ioctl,
1526 .listen = rose_listen,
1527 .shutdown = sock_no_shutdown,
1528 .setsockopt = rose_setsockopt,
1529 .getsockopt = rose_getsockopt,
1530 .sendmsg = rose_sendmsg,
1531 .recvmsg = rose_recvmsg,
1532 .mmap = sock_no_mmap,
1533 .sendpage = sock_no_sendpage,
1534};
1535
1536static struct notifier_block rose_dev_notifier = {
1537 .notifier_call = rose_device_event,
1538};
1539
1540static struct net_device **dev_rose;
1541
8d5cf596
RB		 1542static struct ax25_protocol rose_pid = {
1543 .pid = AX25_P_ROSE,
1544 .func = rose_route_frame
1545};
1546
a4282717
RB		 1547static struct ax25_linkfail rose_linkfail_notifier = {
1548 .func = rose_link_failed
1549};
1550
1da177e4
LT		 1551static int __init rose_proto_init(void)
1552{
1553 int i;
a83cd2cc 1554 int rc;
1da177e4 1555
a83cd2cc
AD		 1556 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1557 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1558 rc = -EINVAL;
1559 goto out;
1560 }
1561
1562 rc = proto_register(&rose_proto, 0);
1da177e4
LT		 1563 if (rc != 0)
1564 goto out;
1565
1566 rose_callsign = null_ax25_address;
1567
1b30dd35 1568 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1da177e4
LT		 1569 if (dev_rose == NULL) {
1570 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
a83cd2cc
AD		 1571 rc = -ENOMEM;
1572 goto out_proto_unregister;
1da177e4
LT		 1573 }
1574
1da177e4
LT		 1575 for (i = 0; i < rose_ndevs; i++) {
1576 struct net_device *dev;
1577 char name[IFNAMSIZ];
1578
1579 sprintf(name, "rose%d", i);
3dcf7c5e 1580 dev = alloc_netdev(sizeof(struct net_device_stats),
1da177e4
LT		 1581 name, rose_setup);
1582 if (!dev) {
1583 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
70ff3b66 1584 rc = -ENOMEM;
1da177e4
LT		 1585 goto fail;
1586 }
70ff3b66
AD		 1587 rc = register_netdev(dev);
1588 if (rc) {
520d1b83 1589 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1da177e4
LT		 1590 free_netdev(dev);
1591 goto fail;
1592 }
c773e847 1593 rose_set_lockdep_key(dev);
1da177e4
LT		 1594 dev_rose[i] = dev;
1595 }
1596
1597 sock_register(&rose_family_ops);
1598 register_netdevice_notifier(&rose_dev_notifier);
1da177e4 1599
8d5cf596 1600 ax25_register_pid(&rose_pid);
a4282717 1601 ax25_linkfail_register(&rose_linkfail_notifier);
1da177e4
LT		 1602
1603#ifdef CONFIG_SYSCTL
1604 rose_register_sysctl();
1605#endif
1606 rose_loopback_init();
1607
1608 rose_add_loopback_neigh();
1609
457c4cbc
EB		 1610 proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1611 proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1612 proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1613 proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1da177e4
LT		 1614out:
1615 return rc;
1616fail:
1617 while (--i >= 0) {
1618 unregister_netdev(dev_rose[i]);
1619 free_netdev(dev_rose[i]);
1620 }
1621 kfree(dev_rose);
a83cd2cc 1622out_proto_unregister:
1da177e4 1623 proto_unregister(&rose_proto);
70ff3b66 1624 goto out;
1da177e4
LT		 1625}
1626module_init(rose_proto_init);
1627
1628module_param(rose_ndevs, int, 0);
1629MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1630
1631MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1632MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1633MODULE_LICENSE("GPL");
1634MODULE_ALIAS_NETPROTO(PF_ROSE);
1635
1636static void __exit rose_exit(void)
1637{
1638 int i;
1639
457c4cbc
EB		 1640 proc_net_remove(&init_net, "rose");
1641 proc_net_remove(&init_net, "rose_neigh");
1642 proc_net_remove(&init_net, "rose_nodes");
1643 proc_net_remove(&init_net, "rose_routes");
1da177e4
LT		 1644 rose_loopback_clear();
1645
1646 rose_rt_free();
1647
1648 ax25_protocol_release(AX25_P_ROSE);
a4282717 1649 ax25_linkfail_release(&rose_linkfail_notifier);
1da177e4
LT		 1650
1651 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1652 ax25_listen_release(&rose_callsign, NULL);
1653
1654#ifdef CONFIG_SYSCTL
1655 rose_unregister_sysctl();
1656#endif
1657 unregister_netdevice_notifier(&rose_dev_notifier);
1658
1659 sock_unregister(PF_ROSE);
1660
1661 for (i = 0; i < rose_ndevs; i++) {
1662 struct net_device *dev = dev_rose[i];
1663
1664 if (dev) {
1665 unregister_netdev(dev);
1666 free_netdev(dev);
1667 }
1668 }
1669
1670 kfree(dev_rose);
1671 proto_unregister(&rose_proto);
1672}
1673
1674module_exit(rose_exit);
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