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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[linux-2.6-block.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>
5a0e3ad6 21#include <linux/slab.h>
1da177e4 22#include <linux/kernel.h>
3f07c014 23#include <linux/sched/signal.h>
1da177e4
LT		 24#include <linux/spinlock.h>
25#include <linux/timer.h>
26#include <linux/string.h>
27#include <linux/sockios.h>
28#include <linux/net.h>
29#include <linux/stat.h>
457c4cbc 30#include <net/net_namespace.h>
1da177e4
LT		 31#include <net/ax25.h>
32#include <linux/inet.h>
33#include <linux/netdevice.h>
34#include <linux/if_arp.h>
35#include <linux/skbuff.h>
36#include <net/sock.h>
7c0f6ba6 37#include <linux/uaccess.h>
1da177e4
LT		 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
5708e868 66static const struct proto_ops rose_proto_ops;
1da177e4
LT		 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 */
dcf777f6 95char *rose2asc(char *buf, const rose_address *addr)
1da177e4 96{
1da177e4
LT		 97 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
98 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
99 addr->rose_addr[4] == 0x00) {
dcf777f6 100 strcpy(buf, "*");
1da177e4 101 } else {
dcf777f6 102 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
1da177e4
LT		 103 addr->rose_addr[1] & 0xFF,
104 addr->rose_addr[2] & 0xFF,
105 addr->rose_addr[3] & 0xFF,
106 addr->rose_addr[4] & 0xFF);
107 }
108
dcf777f6 109 return buf;
1da177e4
LT		 110}
111
112/*
113 * Compare two ROSE addresses, 0 == equal.
114 */
115int rosecmp(rose_address *addr1, rose_address *addr2)
116{
117 int i;
118
119 for (i = 0; i < 5; i++)
120 if (addr1->rose_addr[i] != addr2->rose_addr[i])
121 return 1;
122
123 return 0;
124}
125
126/*
127 * Compare two ROSE addresses for only mask digits, 0 == equal.
128 */
129int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
130{
95b7d924 131 unsigned int i, j;
1da177e4
LT		 132
133 if (mask > 10)
134 return 1;
135
136 for (i = 0; i < mask; i++) {
137 j = i / 2;
138
139 if ((i % 2) != 0) {
140 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
141 return 1;
142 } else {
143 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
144 return 1;
145 }
146 }
147
148 return 0;
149}
150
151/*
152 * Socket removal during an interrupt is now safe.
153 */
154static void rose_remove_socket(struct sock *sk)
155{
156 spin_lock_bh(&rose_list_lock);
157 sk_del_node_init(sk);
158 spin_unlock_bh(&rose_list_lock);
159}
160
161/*
162 * Kill all bound sockets on a broken link layer connection to a
163 * particular neighbour.
164 */
165void rose_kill_by_neigh(struct rose_neigh *neigh)
166{
167 struct sock *s;
1da177e4
LT		 168
169 spin_lock_bh(&rose_list_lock);
b67bfe0d 170 sk_for_each(s, &rose_list) {
1da177e4
LT		 171 struct rose_sock *rose = rose_sk(s);
172
173 if (rose->neighbour == neigh) {
174 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
175 rose->neighbour->use--;
176 rose->neighbour = NULL;
177 }
178 }
179 spin_unlock_bh(&rose_list_lock);
180}
181
182/*
183 * Kill all bound sockets on a dropped device.
184 */
185static void rose_kill_by_device(struct net_device *dev)
186{
187 struct sock *s;
1da177e4
LT		 188
189 spin_lock_bh(&rose_list_lock);
b67bfe0d 190 sk_for_each(s, &rose_list) {
1da177e4
LT		 191 struct rose_sock *rose = rose_sk(s);
192
193 if (rose->device == dev) {
194 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
d496f784
RB		 195 if (rose->neighbour)
196 rose->neighbour->use--;
1da177e4
LT		 197 rose->device = NULL;
198 }
199 }
200 spin_unlock_bh(&rose_list_lock);
201}
202
203/*
204 * Handle device status changes.
205 */
351638e7
JP		 206static int rose_device_event(struct notifier_block *this,
207 unsigned long event, void *ptr)
1da177e4 208{
351638e7 209 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1da177e4 210
721499e8 211 if (!net_eq(dev_net(dev), &init_net))
e9dc8653
EB		 212 return NOTIFY_DONE;
213
1da177e4
LT		 214 if (event != NETDEV_DOWN)
215 return NOTIFY_DONE;
216
217 switch (dev->type) {
218 case ARPHRD_ROSE:
219 rose_kill_by_device(dev);
220 break;
221 case ARPHRD_AX25:
222 rose_link_device_down(dev);
223 rose_rt_device_down(dev);
224 break;
225 }
226
227 return NOTIFY_DONE;
228}
229
230/*
231 * Add a socket to the bound sockets list.
232 */
233static void rose_insert_socket(struct sock *sk)
234{
235
236 spin_lock_bh(&rose_list_lock);
237 sk_add_node(sk, &rose_list);
238 spin_unlock_bh(&rose_list_lock);
239}
240
241/*
242 * Find a socket that wants to accept the Call Request we just
243 * received.
244 */
245static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
246{
247 struct sock *s;
1da177e4
LT		 248
249 spin_lock_bh(&rose_list_lock);
b67bfe0d 250 sk_for_each(s, &rose_list) {
1da177e4
LT		 251 struct rose_sock *rose = rose_sk(s);
252
253 if (!rosecmp(&rose->source_addr, addr) &&
254 !ax25cmp(&rose->source_call, call) &&
255 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
256 goto found;
257 }
258
b67bfe0d 259 sk_for_each(s, &rose_list) {
1da177e4
LT		 260 struct rose_sock *rose = rose_sk(s);
261
262 if (!rosecmp(&rose->source_addr, addr) &&
263 !ax25cmp(&rose->source_call, &null_ax25_address) &&
264 s->sk_state == TCP_LISTEN)
265 goto found;
266 }
267 s = NULL;
268found:
269 spin_unlock_bh(&rose_list_lock);
270 return s;
271}
272
273/*
274 * Find a connected ROSE socket given my LCI and device.
275 */
276struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
277{
278 struct sock *s;
1da177e4
LT		 279
280 spin_lock_bh(&rose_list_lock);
b67bfe0d 281 sk_for_each(s, &rose_list) {
1da177e4
LT		 282 struct rose_sock *rose = rose_sk(s);
283
284 if (rose->lci == lci && rose->neighbour == neigh)
285 goto found;
286 }
287 s = NULL;
288found:
289 spin_unlock_bh(&rose_list_lock);
290 return s;
291}
292
293/*
294 * Find a unique LCI for a given device.
295 */
296unsigned int rose_new_lci(struct rose_neigh *neigh)
297{
298 int lci;
299
300 if (neigh->dce_mode) {
301 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
302 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
303 return lci;
304 } else {
305 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
306 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
307 return lci;
308 }
309
310 return 0;
311}
312
313/*
314 * Deferred destroy.
315 */
316void rose_destroy_socket(struct sock *);
317
318/*
319 * Handler for deferred kills.
320 */
4966babd 321static void rose_destroy_timer(struct timer_list *t)
1da177e4 322{
4966babd
KC		 323 struct sock *sk = from_timer(sk, t, sk_timer);
324
325 rose_destroy_socket(sk);
1da177e4
LT		 326}
327
328/*
329 * This is called from user mode and the timers. Thus it protects itself
330 * against interrupt users but doesn't worry about being called during
331 * work. Once it is removed from the queue no interrupt or bottom half
332 * will touch it and we are (fairly 8-) ) safe.
333 */
334void rose_destroy_socket(struct sock *sk)
335{
336 struct sk_buff *skb;
337
338 rose_remove_socket(sk);
339 rose_stop_heartbeat(sk);
340 rose_stop_idletimer(sk);
341 rose_stop_timer(sk);
342
343 rose_clear_queues(sk); /* Flush the queues */
344
345 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
346 if (skb->sk != sk) { /* A pending connection */
347 /* Queue the unaccepted socket for death */
348 sock_set_flag(skb->sk, SOCK_DEAD);
349 rose_start_heartbeat(skb->sk);
350 rose_sk(skb->sk)->state = ROSE_STATE_0;
351 }
352
353 kfree_skb(skb);
354 }
355
c564039f 356 if (sk_has_allocations(sk)) {
1da177e4 357 /* Defer: outstanding buffers */
4966babd 358 timer_setup(&sk->sk_timer, rose_destroy_timer, 0);
1da177e4 359 sk->sk_timer.expires = jiffies + 10 * HZ;
1da177e4
LT		 360 add_timer(&sk->sk_timer);
361 } else
362 sock_put(sk);
363}
364
365/*
366 * Handling for system calls applied via the various interfaces to a
367 * ROSE socket object.
368 */
369
370static int rose_setsockopt(struct socket *sock, int level, int optname,
b7058842 371 char __user *optval, unsigned int optlen)
1da177e4
LT		 372{
373 struct sock *sk = sock->sk;
374 struct rose_sock *rose = rose_sk(sk);
375 int opt;
376
377 if (level != SOL_ROSE)
378 return -ENOPROTOOPT;
379
380 if (optlen < sizeof(int))
381 return -EINVAL;
382
383 if (get_user(opt, (int __user *)optval))
384 return -EFAULT;
385
386 switch (optname) {
387 case ROSE_DEFER:
388 rose->defer = opt ? 1 : 0;
389 return 0;
390
391 case ROSE_T1:
392 if (opt < 1)
393 return -EINVAL;
394 rose->t1 = opt * HZ;
395 return 0;
396
397 case ROSE_T2:
398 if (opt < 1)
399 return -EINVAL;
400 rose->t2 = opt * HZ;
401 return 0;
402
403 case ROSE_T3:
404 if (opt < 1)
405 return -EINVAL;
406 rose->t3 = opt * HZ;
407 return 0;
408
409 case ROSE_HOLDBACK:
410 if (opt < 1)
411 return -EINVAL;
412 rose->hb = opt * HZ;
413 return 0;
414
415 case ROSE_IDLE:
416 if (opt < 0)
417 return -EINVAL;
418 rose->idle = opt * 60 * HZ;
419 return 0;
420
421 case ROSE_QBITINCL:
422 rose->qbitincl = opt ? 1 : 0;
423 return 0;
424
425 default:
426 return -ENOPROTOOPT;
427 }
428}
429
430static int rose_getsockopt(struct socket *sock, int level, int optname,
431 char __user *optval, int __user *optlen)
432{
433 struct sock *sk = sock->sk;
434 struct rose_sock *rose = rose_sk(sk);
435 int val = 0;
436 int len;
437
438 if (level != SOL_ROSE)
439 return -ENOPROTOOPT;
440
441 if (get_user(len, optlen))
442 return -EFAULT;
443
444 if (len < 0)
445 return -EINVAL;
446
447 switch (optname) {
448 case ROSE_DEFER:
449 val = rose->defer;
450 break;
451
452 case ROSE_T1:
453 val = rose->t1 / HZ;
454 break;
455
456 case ROSE_T2:
457 val = rose->t2 / HZ;
458 break;
459
460 case ROSE_T3:
461 val = rose->t3 / HZ;
462 break;
463
464 case ROSE_HOLDBACK:
465 val = rose->hb / HZ;
466 break;
467
468 case ROSE_IDLE:
469 val = rose->idle / (60 * HZ);
470 break;
471
472 case ROSE_QBITINCL:
473 val = rose->qbitincl;
474 break;
475
476 default:
477 return -ENOPROTOOPT;
478 }
479
480 len = min_t(unsigned int, len, sizeof(int));
481
482 if (put_user(len, optlen))
483 return -EFAULT;
484
485 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
486}
487
488static int rose_listen(struct socket *sock, int backlog)
489{
490 struct sock *sk = sock->sk;
491
492 if (sk->sk_state != TCP_LISTEN) {
493 struct rose_sock *rose = rose_sk(sk);
494
495 rose->dest_ndigis = 0;
496 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
497 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
498 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
499 sk->sk_max_ack_backlog = backlog;
500 sk->sk_state = TCP_LISTEN;
501 return 0;
502 }
503
504 return -EOPNOTSUPP;
505}
506
507static struct proto rose_proto = {
508 .name = "ROSE",
509 .owner = THIS_MODULE,
510 .obj_size = sizeof(struct rose_sock),
511};
512
3f378b68
EP		 513static int rose_create(struct net *net, struct socket *sock, int protocol,
514 int kern)
1da177e4
LT		 515{
516 struct sock *sk;
517 struct rose_sock *rose;
518
09ad9bc7 519 if (!net_eq(net, &init_net))
1b8d7ae4
EB		 520 return -EAFNOSUPPORT;
521
1da177e4
LT		 522 if (sock->type != SOCK_SEQPACKET || protocol != 0)
523 return -ESOCKTNOSUPPORT;
524
11aa9c28 525 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
6257ff21 526 if (sk == NULL)
1da177e4
LT		 527 return -ENOMEM;
528
529 rose = rose_sk(sk);
530
531 sock_init_data(sock, sk);
532
533 skb_queue_head_init(&rose->ack_queue);
534#ifdef M_BIT
535 skb_queue_head_init(&rose->frag_queue);
536 rose->fraglen = 0;
537#endif
538
539 sock->ops = &rose_proto_ops;
540 sk->sk_protocol = protocol;
541
4966babd
KC		 542 timer_setup(&rose->timer, NULL, 0);
543 timer_setup(&rose->idletimer, NULL, 0);
1da177e4 544
82e84249
RB		 545 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
546 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
547 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
548 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
549 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
1da177e4
LT		 550
551 rose->state = ROSE_STATE_0;
552
553 return 0;
554}
555
556static struct sock *rose_make_new(struct sock *osk)
557{
558 struct sock *sk;
559 struct rose_sock *rose, *orose;
560
561 if (osk->sk_type != SOCK_SEQPACKET)
562 return NULL;
563
11aa9c28 564 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
6257ff21 565 if (sk == NULL)
1da177e4
LT		 566 return NULL;
567
568 rose = rose_sk(sk);
569
570 sock_init_data(NULL, sk);
571
572 skb_queue_head_init(&rose->ack_queue);
573#ifdef M_BIT
574 skb_queue_head_init(&rose->frag_queue);
575 rose->fraglen = 0;
576#endif
577
578 sk->sk_type = osk->sk_type;
1da177e4
LT		 579 sk->sk_priority = osk->sk_priority;
580 sk->sk_protocol = osk->sk_protocol;
581 sk->sk_rcvbuf = osk->sk_rcvbuf;
582 sk->sk_sndbuf = osk->sk_sndbuf;
583 sk->sk_state = TCP_ESTABLISHED;
53b924b3 584 sock_copy_flags(sk, osk);
1da177e4 585
4966babd
KC		 586 timer_setup(&rose->timer, NULL, 0);
587 timer_setup(&rose->idletimer, NULL, 0);
1da177e4
LT		 588
589 orose = rose_sk(osk);
590 rose->t1 = orose->t1;
591 rose->t2 = orose->t2;
592 rose->t3 = orose->t3;
593 rose->hb = orose->hb;
594 rose->idle = orose->idle;
595 rose->defer = orose->defer;
596 rose->device = orose->device;
597 rose->qbitincl = orose->qbitincl;
598
599 return sk;
600}
601
602static int rose_release(struct socket *sock)
603{
604 struct sock *sk = sock->sk;
605 struct rose_sock *rose;
606
607 if (sk == NULL) return 0;
608
4965291a
JP		 609 sock_hold(sk);
610 sock_orphan(sk);
611 lock_sock(sk);
1da177e4
LT		 612 rose = rose_sk(sk);
613
614 switch (rose->state) {
615 case ROSE_STATE_0:
4965291a 616 release_sock(sk);
1da177e4 617 rose_disconnect(sk, 0, -1, -1);
4965291a 618 lock_sock(sk);
1da177e4
LT		 619 rose_destroy_socket(sk);
620 break;
621
622 case ROSE_STATE_2:
623 rose->neighbour->use--;
4965291a 624 release_sock(sk);
1da177e4 625 rose_disconnect(sk, 0, -1, -1);
4965291a 626 lock_sock(sk);
1da177e4
LT		 627 rose_destroy_socket(sk);
628 break;
629
630 case ROSE_STATE_1:
631 case ROSE_STATE_3:
632 case ROSE_STATE_4:
633 case ROSE_STATE_5:
634 rose_clear_queues(sk);
635 rose_stop_idletimer(sk);
636 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
637 rose_start_t3timer(sk);
638 rose->state = ROSE_STATE_2;
639 sk->sk_state = TCP_CLOSE;
640 sk->sk_shutdown |= SEND_SHUTDOWN;
641 sk->sk_state_change(sk);
642 sock_set_flag(sk, SOCK_DEAD);
643 sock_set_flag(sk, SOCK_DESTROY);
644 break;
645
646 default:
647 break;
648 }
649
650 sock->sk = NULL;
4965291a
JP		 651 release_sock(sk);
652 sock_put(sk);
1da177e4
LT		 653
654 return 0;
655}
656
657static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
658{
659 struct sock *sk = sock->sk;
660 struct rose_sock *rose = rose_sk(sk);
661 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
662 struct net_device *dev;
01d7dd0e
RB		 663 ax25_address *source;
664 ax25_uid_assoc *user;
1da177e4
LT		 665 int n;
666
667 if (!sock_flag(sk, SOCK_ZAPPED))
668 return -EINVAL;
669
670 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
671 return -EINVAL;
672
673 if (addr->srose_family != AF_ROSE)
674 return -EINVAL;
675
676 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
677 return -EINVAL;
678
9828e6e6 679 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
1da177e4
LT		 680 return -EINVAL;
681
8849b720 682 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
1da177e4 683 return -EADDRNOTAVAIL;
1da177e4
LT		 684
685 source = &addr->srose_call;
686
c2a2b8d3 687 user = ax25_findbyuid(current_euid());
01d7dd0e
RB		 688 if (user) {
689 rose->source_call = user->call;
690 ax25_uid_put(user);
691 } else {
3b9c9f3b
Y		 692 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
693 dev_put(dev);
1da177e4 694 return -EACCES;
3b9c9f3b 695 }
01d7dd0e 696 rose->source_call = *source;
1da177e4
LT		 697 }
698
699 rose->source_addr = addr->srose_addr;
1da177e4
LT		 700 rose->device = dev;
701 rose->source_ndigis = addr->srose_ndigis;
702
703 if (addr_len == sizeof(struct full_sockaddr_rose)) {
704 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
705 for (n = 0 ; n < addr->srose_ndigis ; n++)
706 rose->source_digis[n] = full_addr->srose_digis[n];
707 } else {
708 if (rose->source_ndigis == 1) {
709 rose->source_digis[0] = addr->srose_digi;
710 }
711 }
712
713 rose_insert_socket(sk);
714
715 sock_reset_flag(sk, SOCK_ZAPPED);
8849b720 716
1da177e4
LT		 717 return 0;
718}
719
720static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
721{
722 struct sock *sk = sock->sk;
723 struct rose_sock *rose = rose_sk(sk);
724 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
725 unsigned char cause, diagnostic;
1da177e4 726 struct net_device *dev;
01d7dd0e 727 ax25_uid_assoc *user;
2536b94a 728 int n, err = 0;
1da177e4
LT		 729
730 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
731 return -EINVAL;
732
733 if (addr->srose_family != AF_ROSE)
734 return -EINVAL;
735
736 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
737 return -EINVAL;
738
9828e6e6 739 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
1da177e4
LT		 740 return -EINVAL;
741
742 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
743 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
744 return -EINVAL;
745
2536b94a
RB		 746 lock_sock(sk);
747
748 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
749 /* Connect completed during a ERESTARTSYS event */
750 sock->state = SS_CONNECTED;
751 goto out_release;
752 }
753
754 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
755 sock->state = SS_UNCONNECTED;
756 err = -ECONNREFUSED;
757 goto out_release;
758 }
759
760 if (sk->sk_state == TCP_ESTABLISHED) {
761 /* No reconnect on a seqpacket socket */
762 err = -EISCONN;
763 goto out_release;
764 }
765
766 sk->sk_state = TCP_CLOSE;
767 sock->state = SS_UNCONNECTED;
768
1da177e4 769 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
fe2c802a 770 &diagnostic, 0);
43837b1e
BP		 771 if (!rose->neighbour) {
772 err = -ENETUNREACH;
773 goto out_release;
774 }
1da177e4
LT		 775
776 rose->lci = rose_new_lci(rose->neighbour);
2536b94a
RB		 777 if (!rose->lci) {
778 err = -ENETUNREACH;
779 goto out_release;
780 }
1da177e4
LT		 781
782 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
783 sock_reset_flag(sk, SOCK_ZAPPED);
784
2536b94a
RB		 785 if ((dev = rose_dev_first()) == NULL) {
786 err = -ENETUNREACH;
787 goto out_release;
788 }
1da177e4 789
c2a2b8d3 790 user = ax25_findbyuid(current_euid());
2536b94a
RB		 791 if (!user) {
792 err = -EINVAL;
793 goto out_release;
794 }
1da177e4
LT		 795
796 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
01d7dd0e 797 rose->source_call = user->call;
1da177e4 798 rose->device = dev;
01d7dd0e 799 ax25_uid_put(user);
1da177e4
LT		 800
801 rose_insert_socket(sk); /* Finish the bind */
802 }
1da177e4
LT		 803 rose->dest_addr = addr->srose_addr;
804 rose->dest_call = addr->srose_call;
805 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
806 rose->dest_ndigis = addr->srose_ndigis;
807
808 if (addr_len == sizeof(struct full_sockaddr_rose)) {
809 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
810 for (n = 0 ; n < addr->srose_ndigis ; n++)
811 rose->dest_digis[n] = full_addr->srose_digis[n];
812 } else {
813 if (rose->dest_ndigis == 1) {
814 rose->dest_digis[0] = addr->srose_digi;
815 }
816 }
817
818 /* Move to connecting socket, start sending Connect Requests */
819 sock->state = SS_CONNECTING;
820 sk->sk_state = TCP_SYN_SENT;
821
822 rose->state = ROSE_STATE_1;
823
824 rose->neighbour->use++;
825
826 rose_write_internal(sk, ROSE_CALL_REQUEST);
827 rose_start_heartbeat(sk);
828 rose_start_t1timer(sk);
829
830 /* Now the loop */
2536b94a
RB		 831 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
832 err = -EINPROGRESS;
833 goto out_release;
834 }
1da177e4
LT		 835
836 /*
837 * A Connect Ack with Choke or timeout or failed routing will go to
838 * closed.
839 */
840 if (sk->sk_state == TCP_SYN_SENT) {
75606dc6 841 DEFINE_WAIT(wait);
1da177e4 842
1da177e4 843 for (;;) {
aa395145 844 prepare_to_wait(sk_sleep(sk), &wait,
6140efb5 845 TASK_INTERRUPTIBLE);
1da177e4
LT		 846 if (sk->sk_state != TCP_SYN_SENT)
847 break;
75606dc6
RB		 848 if (!signal_pending(current)) {
849 release_sock(sk);
1da177e4 850 schedule();
2536b94a 851 lock_sock(sk);
1da177e4
LT		 852 continue;
853 }
75606dc6
RB		 854 err = -ERESTARTSYS;
855 break;
1da177e4 856 }
aa395145 857 finish_wait(sk_sleep(sk), &wait);
75606dc6
RB		 858
859 if (err)
860 goto out_release;
1da177e4
LT		 861 }
862
863 if (sk->sk_state != TCP_ESTABLISHED) {
864 sock->state = SS_UNCONNECTED;
2536b94a
RB		 865 err = sock_error(sk); /* Always set at this point */
866 goto out_release;
1da177e4
LT		 867 }
868
869 sock->state = SS_CONNECTED;
870
2536b94a
RB		 871out_release:
872 release_sock(sk);
873
874 return err;
1da177e4
LT		 875}
876
cdfbabfb
DH		 877static int rose_accept(struct socket *sock, struct socket *newsock, int flags,
878 bool kern)
1da177e4 879{
1da177e4
LT		 880 struct sk_buff *skb;
881 struct sock *newsk;
75606dc6 882 DEFINE_WAIT(wait);
1da177e4
LT		 883 struct sock *sk;
884 int err = 0;
885
886 if ((sk = sock->sk) == NULL)
887 return -EINVAL;
888
889 lock_sock(sk);
890 if (sk->sk_type != SOCK_SEQPACKET) {
891 err = -EOPNOTSUPP;
75606dc6 892 goto out_release;
1da177e4
LT		 893 }
894
895 if (sk->sk_state != TCP_LISTEN) {
896 err = -EINVAL;
75606dc6 897 goto out_release;
1da177e4
LT		 898 }
899
900 /*
901 * The write queue this time is holding sockets ready to use
902 * hooked into the SABM we saved
903 */
1da177e4 904 for (;;) {
aa395145 905 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
75606dc6 906
1da177e4
LT		 907 skb = skb_dequeue(&sk->sk_receive_queue);
908 if (skb)
909 break;
910
1da177e4 911 if (flags & O_NONBLOCK) {
75606dc6
RB		 912 err = -EWOULDBLOCK;
913 break;
1da177e4 914 }
75606dc6
RB		 915 if (!signal_pending(current)) {
916 release_sock(sk);
1da177e4
LT		 917 schedule();
918 lock_sock(sk);
919 continue;
920 }
75606dc6
RB		 921 err = -ERESTARTSYS;
922 break;
1da177e4 923 }
aa395145 924 finish_wait(sk_sleep(sk), &wait);
75606dc6
RB		 925 if (err)
926 goto out_release;
1da177e4
LT		 927
928 newsk = skb->sk;
44ccff1f 929 sock_graft(newsk, newsock);
1da177e4
LT		 930
931 /* Now attach up the new socket */
932 skb->sk = NULL;
933 kfree_skb(skb);
934 sk->sk_ack_backlog--;
1da177e4 935
75606dc6 936out_release:
1da177e4
LT		 937 release_sock(sk);
938
939 return err;
940}
941
942static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
9b2c45d4 943 int peer)
1da177e4
LT		 944{
945 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
946 struct sock *sk = sock->sk;
947 struct rose_sock *rose = rose_sk(sk);
948 int n;
949
17ac2e9c 950 memset(srose, 0, sizeof(*srose));
1da177e4
LT		 951 if (peer != 0) {
952 if (sk->sk_state != TCP_ESTABLISHED)
953 return -ENOTCONN;
954 srose->srose_family = AF_ROSE;
955 srose->srose_addr = rose->dest_addr;
956 srose->srose_call = rose->dest_call;
957 srose->srose_ndigis = rose->dest_ndigis;
958 for (n = 0; n < rose->dest_ndigis; n++)
959 srose->srose_digis[n] = rose->dest_digis[n];
960 } else {
961 srose->srose_family = AF_ROSE;
962 srose->srose_addr = rose->source_addr;
963 srose->srose_call = rose->source_call;
964 srose->srose_ndigis = rose->source_ndigis;
965 for (n = 0; n < rose->source_ndigis; n++)
966 srose->srose_digis[n] = rose->source_digis[n];
967 }
968
9b2c45d4 969 return sizeof(struct full_sockaddr_rose);
1da177e4
LT		 970}
971
972int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
973{
974 struct sock *sk;
975 struct sock *make;
976 struct rose_sock *make_rose;
977 struct rose_facilities_struct facilities;
e0bccd31 978 int n;
1da177e4
LT		 979
980 skb->sk = NULL; /* Initially we don't know who it's for */
981
982 /*
983 * skb->data points to the rose frame start
984 */
985 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
986
e0bccd31
BH		 987 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
988 skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
989 &facilities)) {
1da177e4
LT		 990 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
991 return 0;
992 }
993
994 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
995
996 /*
997 * We can't accept the Call Request.
998 */
999 if (sk == NULL || sk_acceptq_is_full(sk) ||
1000 (make = rose_make_new(sk)) == NULL) {
1001 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1002 return 0;
1003 }
1004
1005 skb->sk = make;
1006 make->sk_state = TCP_ESTABLISHED;
1007 make_rose = rose_sk(make);
1008
1009 make_rose->lci = lci;
1010 make_rose->dest_addr = facilities.dest_addr;
1011 make_rose->dest_call = facilities.dest_call;
1012 make_rose->dest_ndigis = facilities.dest_ndigis;
1013 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1014 make_rose->dest_digis[n] = facilities.dest_digis[n];
1015 make_rose->source_addr = facilities.source_addr;
1016 make_rose->source_call = facilities.source_call;
1017 make_rose->source_ndigis = facilities.source_ndigis;
1018 for (n = 0 ; n < facilities.source_ndigis ; n++)
db34de93 1019 make_rose->source_digis[n] = facilities.source_digis[n];
1da177e4
LT		 1020 make_rose->neighbour = neigh;
1021 make_rose->device = dev;
1022 make_rose->facilities = facilities;
1023
1024 make_rose->neighbour->use++;
1025
1026 if (rose_sk(sk)->defer) {
1027 make_rose->state = ROSE_STATE_5;
1028 } else {
1029 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1030 make_rose->state = ROSE_STATE_3;
1031 rose_start_idletimer(make);
1032 }
1033
1034 make_rose->condition = 0x00;
1035 make_rose->vs = 0;
1036 make_rose->va = 0;
1037 make_rose->vr = 0;
1038 make_rose->vl = 0;
1039 sk->sk_ack_backlog++;
1040
1041 rose_insert_socket(make);
1042
1043 skb_queue_head(&sk->sk_receive_queue, skb);
1044
1045 rose_start_heartbeat(make);
1046
1047 if (!sock_flag(sk, SOCK_DEAD))
676d2369 1048 sk->sk_data_ready(sk);
1da177e4
LT		 1049
1050 return 1;
1051}
1052
1b784140 1053static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1da177e4
LT		 1054{
1055 struct sock *sk = sock->sk;
1056 struct rose_sock *rose = rose_sk(sk);
342dfc30 1057 DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1da177e4
LT		 1058 int err;
1059 struct full_sockaddr_rose srose;
1060 struct sk_buff *skb;
1061 unsigned char *asmptr;
1062 int n, size, qbit = 0;
1063
1064 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1065 return -EINVAL;
1066
1067 if (sock_flag(sk, SOCK_ZAPPED))
1068 return -EADDRNOTAVAIL;
1069
1070 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1071 send_sig(SIGPIPE, current, 0);
1072 return -EPIPE;
1073 }
1074
1075 if (rose->neighbour == NULL || rose->device == NULL)
1076 return -ENETUNREACH;
1077
1078 if (usrose != NULL) {
1079 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1080 return -EINVAL;
1081 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1082 memcpy(&srose, usrose, msg->msg_namelen);
1083 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1084 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1085 return -EISCONN;
1086 if (srose.srose_ndigis != rose->dest_ndigis)
1087 return -EISCONN;
1088 if (srose.srose_ndigis == rose->dest_ndigis) {
1089 for (n = 0 ; n < srose.srose_ndigis ; n++)
1090 if (ax25cmp(&rose->dest_digis[n],
1091 &srose.srose_digis[n]))
1092 return -EISCONN;
1093 }
1094 if (srose.srose_family != AF_ROSE)
1095 return -EINVAL;
1096 } else {
1097 if (sk->sk_state != TCP_ESTABLISHED)
1098 return -ENOTCONN;
1099
1100 srose.srose_family = AF_ROSE;
1101 srose.srose_addr = rose->dest_addr;
1102 srose.srose_call = rose->dest_call;
1103 srose.srose_ndigis = rose->dest_ndigis;
1104 for (n = 0 ; n < rose->dest_ndigis ; n++)
1105 srose.srose_digis[n] = rose->dest_digis[n];
1106 }
1107
1da177e4 1108 /* Build a packet */
83e0bbcb
AC		 1109 /* Sanity check the packet size */
1110 if (len > 65535)
1111 return -EMSGSIZE;
1112
1da177e4
LT		 1113 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1114
1115 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1116 return err;
1117
1118 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1119
1120 /*
1121 * Put the data on the end
1122 */
1da177e4 1123
eeeb0374
ACM		 1124 skb_reset_transport_header(skb);
1125 skb_put(skb, len);
1da177e4 1126
6ce8e9ce 1127 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1da177e4
LT		 1128 if (err) {
1129 kfree_skb(skb);
1130 return err;
1131 }
1132
1133 /*
1134 * If the Q BIT Include socket option is in force, the first
1135 * byte of the user data is the logical value of the Q Bit.
1136 */
1137 if (rose->qbitincl) {
1138 qbit = skb->data[0];
1139 skb_pull(skb, 1);
1140 }
1141
1142 /*
1143 * Push down the ROSE header
1144 */
1145 asmptr = skb_push(skb, ROSE_MIN_LEN);
1146
1da177e4
LT		 1147 /* Build a ROSE Network header */
1148 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1149 asmptr[1] = (rose->lci >> 0) & 0xFF;
1150 asmptr[2] = ROSE_DATA;
1151
1152 if (qbit)
1153 asmptr[0] |= ROSE_Q_BIT;
1154
1da177e4
LT		 1155 if (sk->sk_state != TCP_ESTABLISHED) {
1156 kfree_skb(skb);
1157 return -ENOTCONN;
1158 }
1159
1160#ifdef M_BIT
1161#define ROSE_PACLEN (256-ROSE_MIN_LEN)
1162 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1163 unsigned char header[ROSE_MIN_LEN];
1164 struct sk_buff *skbn;
1165 int frontlen;
1166 int lg;
1167
1168 /* Save a copy of the Header */
d626f62b 1169 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1da177e4
LT		 1170 skb_pull(skb, ROSE_MIN_LEN);
1171
1172 frontlen = skb_headroom(skb);
1173
1174 while (skb->len > 0) {
1175 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1176 kfree_skb(skb);
1177 return err;
1178 }
1179
1180 skbn->sk = sk;
1181 skbn->free = 1;
1182 skbn->arp = 1;
1183
1184 skb_reserve(skbn, frontlen);
1185
1186 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1187
1188 /* Copy the user data */
d626f62b 1189 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1da177e4
LT		 1190 skb_pull(skb, lg);
1191
1192 /* Duplicate the Header */
1193 skb_push(skbn, ROSE_MIN_LEN);
27d7ff46 1194 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1da177e4
LT		 1195
1196 if (skb->len > 0)
1197 skbn->data[2] |= M_BIT;
1198
1199 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1200 }
1201
1202 skb->free = 1;
1203 kfree_skb(skb);
1204 } else {
1205 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1206 }
1207#else
1208 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1209#endif
1210
1211 rose_kick(sk);
1212
1213 return len;
1214}
1215
1216
1b784140
YX		 1217static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1218 int flags)
1da177e4
LT		 1219{
1220 struct sock *sk = sock->sk;
1221 struct rose_sock *rose = rose_sk(sk);
1da177e4
LT		 1222 size_t copied;
1223 unsigned char *asmptr;
1224 struct sk_buff *skb;
1225 int n, er, qbit;
1226
1227 /*
1228 * This works for seqpacket too. The receiver has ordered the queue for
1229 * us! We do one quick check first though
1230 */
1231 if (sk->sk_state != TCP_ESTABLISHED)
1232 return -ENOTCONN;
1233
1234 /* Now we can treat all alike */
1235 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1236 return er;
1237
1238 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1239
1240 skb_pull(skb, ROSE_MIN_LEN);
1241
1242 if (rose->qbitincl) {
1243 asmptr = skb_push(skb, 1);
1244 *asmptr = qbit;
1245 }
1246
badff6d0 1247 skb_reset_transport_header(skb);
1da177e4
LT		 1248 copied = skb->len;
1249
1250 if (copied > size) {
1251 copied = size;
1252 msg->msg_flags |= MSG_TRUNC;
1253 }
1254
51f3d02b 1255 skb_copy_datagram_msg(skb, 0, msg, copied);
1da177e4 1256
f3d33426
HFS		 1257 if (msg->msg_name) {
1258 struct sockaddr_rose *srose;
342dfc30
SH		 1259 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1260 msg->msg_name);
f3d33426
HFS		 1261
1262 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1263 srose = msg->msg_name;
1da177e4
LT		 1264 srose->srose_family = AF_ROSE;
1265 srose->srose_addr = rose->dest_addr;
1266 srose->srose_call = rose->dest_call;
1267 srose->srose_ndigis = rose->dest_ndigis;
f81152e3
FW		 1268 for (n = 0 ; n < rose->dest_ndigis ; n++)
1269 full_srose->srose_digis[n] = rose->dest_digis[n];
1270 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1da177e4
LT		 1271 }
1272
1273 skb_free_datagram(sk, skb);
1274
1275 return copied;
1276}
1277
1278
1279static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1280{
1281 struct sock *sk = sock->sk;
1282 struct rose_sock *rose = rose_sk(sk);
1283 void __user *argp = (void __user *)arg;
1284
1285 switch (cmd) {
1286 case TIOCOUTQ: {
1287 long amount;
31e6d363
ED		 1288
1289 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1da177e4
LT		 1290 if (amount < 0)
1291 amount = 0;
20b7d10a 1292 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1293 }
1294
1295 case TIOCINQ: {
1296 struct sk_buff *skb;
1297 long amount = 0L;
1298 /* These two are safe on a single CPU system as only user tasks fiddle here */
1299 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1300 amount = skb->len;
20b7d10a 1301 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1302 }
1303
1304 case SIOCGSTAMP:
20b7d10a 1305 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1da177e4 1306
ae40eb1e
ED		 1307 case SIOCGSTAMPNS:
1308 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1309
1da177e4
LT		 1310 case SIOCGIFADDR:
1311 case SIOCSIFADDR:
1312 case SIOCGIFDSTADDR:
1313 case SIOCSIFDSTADDR:
1314 case SIOCGIFBRDADDR:
1315 case SIOCSIFBRDADDR:
1316 case SIOCGIFNETMASK:
1317 case SIOCSIFNETMASK:
1318 case SIOCGIFMETRIC:
1319 case SIOCSIFMETRIC:
1320 return -EINVAL;
1321
1322 case SIOCADDRT:
1323 case SIOCDELRT:
1324 case SIOCRSCLRRT:
1325 if (!capable(CAP_NET_ADMIN))
1326 return -EPERM;
1327 return rose_rt_ioctl(cmd, argp);
1328
1329 case SIOCRSGCAUSE: {
1330 struct rose_cause_struct rose_cause;
1331 rose_cause.cause = rose->cause;
1332 rose_cause.diagnostic = rose->diagnostic;
1333 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1334 }
1335
1336 case SIOCRSSCAUSE: {
1337 struct rose_cause_struct rose_cause;
1338 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1339 return -EFAULT;
1340 rose->cause = rose_cause.cause;
1341 rose->diagnostic = rose_cause.diagnostic;
1342 return 0;
1343 }
1344
1345 case SIOCRSSL2CALL:
1346 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1347 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1348 ax25_listen_release(&rose_callsign, NULL);
1349 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1350 return -EFAULT;
1351 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
81dcd169
RB		 1352 return ax25_listen_register(&rose_callsign, NULL);
1353
1da177e4
LT		 1354 return 0;
1355
1356 case SIOCRSGL2CALL:
1357 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1358
1359 case SIOCRSACCEPT:
1360 if (rose->state == ROSE_STATE_5) {
1361 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1362 rose_start_idletimer(sk);
1363 rose->condition = 0x00;
1364 rose->vs = 0;
1365 rose->va = 0;
1366 rose->vr = 0;
1367 rose->vl = 0;
1368 rose->state = ROSE_STATE_3;
1369 }
1370 return 0;
1371
1372 default:
b5e5fa5e 1373 return -ENOIOCTLCMD;
1da177e4
LT		 1374 }
1375
1376 return 0;
1377}
1378
1379#ifdef CONFIG_PROC_FS
1380static void *rose_info_start(struct seq_file *seq, loff_t *pos)
95b7d924 1381 __acquires(rose_list_lock)
1da177e4 1382{
1da177e4 1383 spin_lock_bh(&rose_list_lock);
b999748a 1384 return seq_hlist_start_head(&rose_list, *pos);
1da177e4
LT		 1385}
1386
1387static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1388{
b999748a 1389 return seq_hlist_next(v, &rose_list, pos);
1da177e4 1390}
3dcf7c5e 1391
1da177e4 1392static void rose_info_stop(struct seq_file *seq, void *v)
95b7d924 1393 __releases(rose_list_lock)
1da177e4
LT		 1394{
1395 spin_unlock_bh(&rose_list_lock);
1396}
1397
1398static int rose_info_show(struct seq_file *seq, void *v)
1399{
dcf777f6 1400 char buf[11], rsbuf[11];
f75268cd 1401
1da177e4 1402 if (v == SEQ_START_TOKEN)
3dcf7c5e 1403 seq_puts(seq,
1da177e4
LT		 1404 "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");
1405
1406 else {
b999748a 1407 struct sock *s = sk_entry(v);
1da177e4
LT		 1408 struct rose_sock *rose = rose_sk(s);
1409 const char *devname, *callsign;
1410 const struct net_device *dev = rose->device;
1411
1412 if (!dev)
1413 devname = "???";
1414 else
1415 devname = dev->name;
3dcf7c5e 1416
1da177e4 1417 seq_printf(seq, "%-10s %-9s ",
dcf777f6
RB		 1418 rose2asc(rsbuf, &rose->dest_addr),
1419 ax2asc(buf, &rose->dest_call));
1da177e4
LT		 1420
1421 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1422 callsign = "??????-?";
1423 else
f75268cd 1424 callsign = ax2asc(buf, &rose->source_call);
1da177e4
LT		 1425
1426 seq_printf(seq,
1427 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
dcf777f6 1428 rose2asc(rsbuf, &rose->source_addr),
1da177e4
LT		 1429 callsign,
1430 devname,
1431 rose->lci & 0x0FFF,
1432 (rose->neighbour) ? rose->neighbour->number : 0,
1433 rose->state,
1434 rose->vs,
1435 rose->vr,
1436 rose->va,
1437 ax25_display_timer(&rose->timer) / HZ,
1438 rose->t1 / HZ,
1439 rose->t2 / HZ,
1440 rose->t3 / HZ,
1441 rose->hb / HZ,
1442 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1443 rose->idle / (60 * HZ),
31e6d363
ED		 1444 sk_wmem_alloc_get(s),
1445 sk_rmem_alloc_get(s),
1da177e4
LT		 1446 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1447 }
1448
1449 return 0;
1450}
1451
56b3d975 1452static const struct seq_operations rose_info_seqops = {
1da177e4
LT		 1453 .start = rose_info_start,
1454 .next = rose_info_next,
1455 .stop = rose_info_stop,
1456 .show = rose_info_show,
1457};
1da177e4
LT		 1458#endif /* CONFIG_PROC_FS */
1459
ec1b4cf7 1460static const struct net_proto_family rose_family_ops = {
1da177e4
LT		 1461 .family = PF_ROSE,
1462 .create = rose_create,
1463 .owner = THIS_MODULE,
1464};
1465
5708e868 1466static const struct proto_ops rose_proto_ops = {
1da177e4
LT		 1467 .family = PF_ROSE,
1468 .owner = THIS_MODULE,
1469 .release = rose_release,
1470 .bind = rose_bind,
1471 .connect = rose_connect,
1472 .socketpair = sock_no_socketpair,
1473 .accept = rose_accept,
1474 .getname = rose_getname,
a11e1d43 1475 .poll = datagram_poll,
1da177e4
LT		 1476 .ioctl = rose_ioctl,
1477 .listen = rose_listen,
1478 .shutdown = sock_no_shutdown,
1479 .setsockopt = rose_setsockopt,
1480 .getsockopt = rose_getsockopt,
1481 .sendmsg = rose_sendmsg,
1482 .recvmsg = rose_recvmsg,
1483 .mmap = sock_no_mmap,
1484 .sendpage = sock_no_sendpage,
1485};
1486
1487static struct notifier_block rose_dev_notifier = {
1488 .notifier_call = rose_device_event,
1489};
1490
1491static struct net_device **dev_rose;
1492
8d5cf596
RB		 1493static struct ax25_protocol rose_pid = {
1494 .pid = AX25_P_ROSE,
1495 .func = rose_route_frame
1496};
1497
a4282717
RB		 1498static struct ax25_linkfail rose_linkfail_notifier = {
1499 .func = rose_link_failed
1500};
1501
1da177e4
LT		 1502static int __init rose_proto_init(void)
1503{
1504 int i;
a83cd2cc 1505 int rc;
1da177e4 1506
a83cd2cc
AD		 1507 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1508 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1509 rc = -EINVAL;
1510 goto out;
1511 }
1512
1513 rc = proto_register(&rose_proto, 0);
1da177e4
LT		 1514 if (rc != 0)
1515 goto out;
1516
1517 rose_callsign = null_ax25_address;
1518
6396bb22
KC		 1519 dev_rose = kcalloc(rose_ndevs, sizeof(struct net_device *),
1520 GFP_KERNEL);
1da177e4
LT		 1521 if (dev_rose == NULL) {
1522 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
a83cd2cc
AD		 1523 rc = -ENOMEM;
1524 goto out_proto_unregister;
1da177e4
LT		 1525 }
1526
1da177e4
LT		 1527 for (i = 0; i < rose_ndevs; i++) {
1528 struct net_device *dev;
1529 char name[IFNAMSIZ];
1530
1531 sprintf(name, "rose%d", i);
c835a677 1532 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1da177e4
LT		 1533 if (!dev) {
1534 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
70ff3b66 1535 rc = -ENOMEM;
1da177e4
LT		 1536 goto fail;
1537 }
70ff3b66
AD		 1538 rc = register_netdev(dev);
1539 if (rc) {
520d1b83 1540 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1da177e4
LT		 1541 free_netdev(dev);
1542 goto fail;
1543 }
c773e847 1544 rose_set_lockdep_key(dev);
1da177e4
LT		 1545 dev_rose[i] = dev;
1546 }
1547
1548 sock_register(&rose_family_ops);
1549 register_netdevice_notifier(&rose_dev_notifier);
1da177e4 1550
8d5cf596 1551 ax25_register_pid(&rose_pid);
a4282717 1552 ax25_linkfail_register(&rose_linkfail_notifier);
1da177e4
LT		 1553
1554#ifdef CONFIG_SYSCTL
1555 rose_register_sysctl();
1556#endif
1557 rose_loopback_init();
1558
1559 rose_add_loopback_neigh();
1560
fddda2b7
CH		 1561 proc_create_seq("rose", 0444, init_net.proc_net, &rose_info_seqops);
1562 proc_create_seq("rose_neigh", 0444, init_net.proc_net,
1563 &rose_neigh_seqops);
1564 proc_create_seq("rose_nodes", 0444, init_net.proc_net,
1565 &rose_node_seqops);
1566 proc_create_seq("rose_routes", 0444, init_net.proc_net,
1567 &rose_route_seqops);
1da177e4
LT		 1568out:
1569 return rc;
1570fail:
1571 while (--i >= 0) {
1572 unregister_netdev(dev_rose[i]);
1573 free_netdev(dev_rose[i]);
1574 }
1575 kfree(dev_rose);
a83cd2cc 1576out_proto_unregister:
1da177e4 1577 proto_unregister(&rose_proto);
70ff3b66 1578 goto out;
1da177e4
LT		 1579}
1580module_init(rose_proto_init);
1581
1582module_param(rose_ndevs, int, 0);
1583MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1584
1585MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1586MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1587MODULE_LICENSE("GPL");
1588MODULE_ALIAS_NETPROTO(PF_ROSE);
1589
1590static void __exit rose_exit(void)
1591{
1592 int i;
1593
ece31ffd
G		 1594 remove_proc_entry("rose", init_net.proc_net);
1595 remove_proc_entry("rose_neigh", init_net.proc_net);
1596 remove_proc_entry("rose_nodes", init_net.proc_net);
1597 remove_proc_entry("rose_routes", init_net.proc_net);
1da177e4
LT		 1598 rose_loopback_clear();
1599
1600 rose_rt_free();
1601
1602 ax25_protocol_release(AX25_P_ROSE);
a4282717 1603 ax25_linkfail_release(&rose_linkfail_notifier);
1da177e4
LT		 1604
1605 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1606 ax25_listen_release(&rose_callsign, NULL);
1607
1608#ifdef CONFIG_SYSCTL
1609 rose_unregister_sysctl();
1610#endif
1611 unregister_netdevice_notifier(&rose_dev_notifier);
1612
1613 sock_unregister(PF_ROSE);
1614
1615 for (i = 0; i < rose_ndevs; i++) {
1616 struct net_device *dev = dev_rose[i];
1617
1618 if (dev) {
1619 unregister_netdev(dev);
1620 free_netdev(dev);
1621 }
1622 }
1623
1624 kfree(dev_rose);
1625 proto_unregister(&rose_proto);
1626}
1627
1628module_exit(rose_exit);
Linux 6.x block layer and io_uring tree(s)