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Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
[mirror_ubuntu-bionic-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>
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 {
1da177e4
LT		 692 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
693 return -EACCES;
01d7dd0e 694 rose->source_call = *source;
1da177e4
LT		 695 }
696
697 rose->source_addr = addr->srose_addr;
1da177e4
LT		 698 rose->device = dev;
699 rose->source_ndigis = addr->srose_ndigis;
700
701 if (addr_len == sizeof(struct full_sockaddr_rose)) {
702 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
703 for (n = 0 ; n < addr->srose_ndigis ; n++)
704 rose->source_digis[n] = full_addr->srose_digis[n];
705 } else {
706 if (rose->source_ndigis == 1) {
707 rose->source_digis[0] = addr->srose_digi;
708 }
709 }
710
711 rose_insert_socket(sk);
712
713 sock_reset_flag(sk, SOCK_ZAPPED);
8849b720 714
1da177e4
LT		 715 return 0;
716}
717
718static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
719{
720 struct sock *sk = sock->sk;
721 struct rose_sock *rose = rose_sk(sk);
722 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
723 unsigned char cause, diagnostic;
1da177e4 724 struct net_device *dev;
01d7dd0e 725 ax25_uid_assoc *user;
2536b94a 726 int n, err = 0;
1da177e4
LT		 727
728 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
729 return -EINVAL;
730
731 if (addr->srose_family != AF_ROSE)
732 return -EINVAL;
733
734 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
735 return -EINVAL;
736
9828e6e6 737 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
1da177e4
LT		 738 return -EINVAL;
739
740 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
741 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
742 return -EINVAL;
743
2536b94a
RB		 744 lock_sock(sk);
745
746 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
747 /* Connect completed during a ERESTARTSYS event */
748 sock->state = SS_CONNECTED;
749 goto out_release;
750 }
751
752 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
753 sock->state = SS_UNCONNECTED;
754 err = -ECONNREFUSED;
755 goto out_release;
756 }
757
758 if (sk->sk_state == TCP_ESTABLISHED) {
759 /* No reconnect on a seqpacket socket */
760 err = -EISCONN;
761 goto out_release;
762 }
763
764 sk->sk_state = TCP_CLOSE;
765 sock->state = SS_UNCONNECTED;
766
1da177e4 767 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
fe2c802a 768 &diagnostic, 0);
43837b1e
BP		 769 if (!rose->neighbour) {
770 err = -ENETUNREACH;
771 goto out_release;
772 }
1da177e4
LT		 773
774 rose->lci = rose_new_lci(rose->neighbour);
2536b94a
RB		 775 if (!rose->lci) {
776 err = -ENETUNREACH;
777 goto out_release;
778 }
1da177e4
LT		 779
780 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
781 sock_reset_flag(sk, SOCK_ZAPPED);
782
2536b94a
RB		 783 if ((dev = rose_dev_first()) == NULL) {
784 err = -ENETUNREACH;
785 goto out_release;
786 }
1da177e4 787
c2a2b8d3 788 user = ax25_findbyuid(current_euid());
2536b94a
RB		 789 if (!user) {
790 err = -EINVAL;
791 goto out_release;
792 }
1da177e4
LT		 793
794 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
01d7dd0e 795 rose->source_call = user->call;
1da177e4 796 rose->device = dev;
01d7dd0e 797 ax25_uid_put(user);
1da177e4
LT		 798
799 rose_insert_socket(sk); /* Finish the bind */
800 }
1da177e4
LT		 801 rose->dest_addr = addr->srose_addr;
802 rose->dest_call = addr->srose_call;
803 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
804 rose->dest_ndigis = addr->srose_ndigis;
805
806 if (addr_len == sizeof(struct full_sockaddr_rose)) {
807 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
808 for (n = 0 ; n < addr->srose_ndigis ; n++)
809 rose->dest_digis[n] = full_addr->srose_digis[n];
810 } else {
811 if (rose->dest_ndigis == 1) {
812 rose->dest_digis[0] = addr->srose_digi;
813 }
814 }
815
816 /* Move to connecting socket, start sending Connect Requests */
817 sock->state = SS_CONNECTING;
818 sk->sk_state = TCP_SYN_SENT;
819
820 rose->state = ROSE_STATE_1;
821
822 rose->neighbour->use++;
823
824 rose_write_internal(sk, ROSE_CALL_REQUEST);
825 rose_start_heartbeat(sk);
826 rose_start_t1timer(sk);
827
828 /* Now the loop */
2536b94a
RB		 829 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
830 err = -EINPROGRESS;
831 goto out_release;
832 }
1da177e4
LT		 833
834 /*
835 * A Connect Ack with Choke or timeout or failed routing will go to
836 * closed.
837 */
838 if (sk->sk_state == TCP_SYN_SENT) {
75606dc6 839 DEFINE_WAIT(wait);
1da177e4 840
1da177e4 841 for (;;) {
aa395145 842 prepare_to_wait(sk_sleep(sk), &wait,
6140efb5 843 TASK_INTERRUPTIBLE);
1da177e4
LT		 844 if (sk->sk_state != TCP_SYN_SENT)
845 break;
75606dc6
RB		 846 if (!signal_pending(current)) {
847 release_sock(sk);
1da177e4 848 schedule();
2536b94a 849 lock_sock(sk);
1da177e4
LT		 850 continue;
851 }
75606dc6
RB		 852 err = -ERESTARTSYS;
853 break;
1da177e4 854 }
aa395145 855 finish_wait(sk_sleep(sk), &wait);
75606dc6
RB		 856
857 if (err)
858 goto out_release;
1da177e4
LT		 859 }
860
861 if (sk->sk_state != TCP_ESTABLISHED) {
862 sock->state = SS_UNCONNECTED;
2536b94a
RB		 863 err = sock_error(sk); /* Always set at this point */
864 goto out_release;
1da177e4
LT		 865 }
866
867 sock->state = SS_CONNECTED;
868
2536b94a
RB		 869out_release:
870 release_sock(sk);
871
872 return err;
1da177e4
LT		 873}
874
cdfbabfb
DH		 875static int rose_accept(struct socket *sock, struct socket *newsock, int flags,
876 bool kern)
1da177e4 877{
1da177e4
LT		 878 struct sk_buff *skb;
879 struct sock *newsk;
75606dc6 880 DEFINE_WAIT(wait);
1da177e4
LT		 881 struct sock *sk;
882 int err = 0;
883
884 if ((sk = sock->sk) == NULL)
885 return -EINVAL;
886
887 lock_sock(sk);
888 if (sk->sk_type != SOCK_SEQPACKET) {
889 err = -EOPNOTSUPP;
75606dc6 890 goto out_release;
1da177e4
LT		 891 }
892
893 if (sk->sk_state != TCP_LISTEN) {
894 err = -EINVAL;
75606dc6 895 goto out_release;
1da177e4
LT		 896 }
897
898 /*
899 * The write queue this time is holding sockets ready to use
900 * hooked into the SABM we saved
901 */
1da177e4 902 for (;;) {
aa395145 903 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
75606dc6 904
1da177e4
LT		 905 skb = skb_dequeue(&sk->sk_receive_queue);
906 if (skb)
907 break;
908
1da177e4 909 if (flags & O_NONBLOCK) {
75606dc6
RB		 910 err = -EWOULDBLOCK;
911 break;
1da177e4 912 }
75606dc6
RB		 913 if (!signal_pending(current)) {
914 release_sock(sk);
1da177e4
LT		 915 schedule();
916 lock_sock(sk);
917 continue;
918 }
75606dc6
RB		 919 err = -ERESTARTSYS;
920 break;
1da177e4 921 }
aa395145 922 finish_wait(sk_sleep(sk), &wait);
75606dc6
RB		 923 if (err)
924 goto out_release;
1da177e4
LT		 925
926 newsk = skb->sk;
44ccff1f 927 sock_graft(newsk, newsock);
1da177e4
LT		 928
929 /* Now attach up the new socket */
930 skb->sk = NULL;
931 kfree_skb(skb);
932 sk->sk_ack_backlog--;
1da177e4 933
75606dc6 934out_release:
1da177e4
LT		 935 release_sock(sk);
936
937 return err;
938}
939
940static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
941 int *uaddr_len, int peer)
942{
943 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
944 struct sock *sk = sock->sk;
945 struct rose_sock *rose = rose_sk(sk);
946 int n;
947
17ac2e9c 948 memset(srose, 0, sizeof(*srose));
1da177e4
LT		 949 if (peer != 0) {
950 if (sk->sk_state != TCP_ESTABLISHED)
951 return -ENOTCONN;
952 srose->srose_family = AF_ROSE;
953 srose->srose_addr = rose->dest_addr;
954 srose->srose_call = rose->dest_call;
955 srose->srose_ndigis = rose->dest_ndigis;
956 for (n = 0; n < rose->dest_ndigis; n++)
957 srose->srose_digis[n] = rose->dest_digis[n];
958 } else {
959 srose->srose_family = AF_ROSE;
960 srose->srose_addr = rose->source_addr;
961 srose->srose_call = rose->source_call;
962 srose->srose_ndigis = rose->source_ndigis;
963 for (n = 0; n < rose->source_ndigis; n++)
964 srose->srose_digis[n] = rose->source_digis[n];
965 }
966
967 *uaddr_len = sizeof(struct full_sockaddr_rose);
968 return 0;
969}
970
971int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
972{
973 struct sock *sk;
974 struct sock *make;
975 struct rose_sock *make_rose;
976 struct rose_facilities_struct facilities;
e0bccd31 977 int n;
1da177e4
LT		 978
979 skb->sk = NULL; /* Initially we don't know who it's for */
980
981 /*
982 * skb->data points to the rose frame start
983 */
984 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
985
e0bccd31
BH		 986 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
987 skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
988 &facilities)) {
1da177e4
LT		 989 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
990 return 0;
991 }
992
993 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
994
995 /*
996 * We can't accept the Call Request.
997 */
998 if (sk == NULL || sk_acceptq_is_full(sk) ||
999 (make = rose_make_new(sk)) == NULL) {
1000 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1001 return 0;
1002 }
1003
1004 skb->sk = make;
1005 make->sk_state = TCP_ESTABLISHED;
1006 make_rose = rose_sk(make);
1007
1008 make_rose->lci = lci;
1009 make_rose->dest_addr = facilities.dest_addr;
1010 make_rose->dest_call = facilities.dest_call;
1011 make_rose->dest_ndigis = facilities.dest_ndigis;
1012 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1013 make_rose->dest_digis[n] = facilities.dest_digis[n];
1014 make_rose->source_addr = facilities.source_addr;
1015 make_rose->source_call = facilities.source_call;
1016 make_rose->source_ndigis = facilities.source_ndigis;
1017 for (n = 0 ; n < facilities.source_ndigis ; n++)
db34de93 1018 make_rose->source_digis[n] = facilities.source_digis[n];
1da177e4
LT		 1019 make_rose->neighbour = neigh;
1020 make_rose->device = dev;
1021 make_rose->facilities = facilities;
1022
1023 make_rose->neighbour->use++;
1024
1025 if (rose_sk(sk)->defer) {
1026 make_rose->state = ROSE_STATE_5;
1027 } else {
1028 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1029 make_rose->state = ROSE_STATE_3;
1030 rose_start_idletimer(make);
1031 }
1032
1033 make_rose->condition = 0x00;
1034 make_rose->vs = 0;
1035 make_rose->va = 0;
1036 make_rose->vr = 0;
1037 make_rose->vl = 0;
1038 sk->sk_ack_backlog++;
1039
1040 rose_insert_socket(make);
1041
1042 skb_queue_head(&sk->sk_receive_queue, skb);
1043
1044 rose_start_heartbeat(make);
1045
1046 if (!sock_flag(sk, SOCK_DEAD))
676d2369 1047 sk->sk_data_ready(sk);
1da177e4
LT		 1048
1049 return 1;
1050}
1051
1b784140 1052static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1da177e4
LT		 1053{
1054 struct sock *sk = sock->sk;
1055 struct rose_sock *rose = rose_sk(sk);
342dfc30 1056 DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1da177e4
LT		 1057 int err;
1058 struct full_sockaddr_rose srose;
1059 struct sk_buff *skb;
1060 unsigned char *asmptr;
1061 int n, size, qbit = 0;
1062
1063 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1064 return -EINVAL;
1065
1066 if (sock_flag(sk, SOCK_ZAPPED))
1067 return -EADDRNOTAVAIL;
1068
1069 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1070 send_sig(SIGPIPE, current, 0);
1071 return -EPIPE;
1072 }
1073
1074 if (rose->neighbour == NULL || rose->device == NULL)
1075 return -ENETUNREACH;
1076
1077 if (usrose != NULL) {
1078 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1079 return -EINVAL;
1080 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1081 memcpy(&srose, usrose, msg->msg_namelen);
1082 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1083 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1084 return -EISCONN;
1085 if (srose.srose_ndigis != rose->dest_ndigis)
1086 return -EISCONN;
1087 if (srose.srose_ndigis == rose->dest_ndigis) {
1088 for (n = 0 ; n < srose.srose_ndigis ; n++)
1089 if (ax25cmp(&rose->dest_digis[n],
1090 &srose.srose_digis[n]))
1091 return -EISCONN;
1092 }
1093 if (srose.srose_family != AF_ROSE)
1094 return -EINVAL;
1095 } else {
1096 if (sk->sk_state != TCP_ESTABLISHED)
1097 return -ENOTCONN;
1098
1099 srose.srose_family = AF_ROSE;
1100 srose.srose_addr = rose->dest_addr;
1101 srose.srose_call = rose->dest_call;
1102 srose.srose_ndigis = rose->dest_ndigis;
1103 for (n = 0 ; n < rose->dest_ndigis ; n++)
1104 srose.srose_digis[n] = rose->dest_digis[n];
1105 }
1106
1da177e4 1107 /* Build a packet */
83e0bbcb
AC		 1108 /* Sanity check the packet size */
1109 if (len > 65535)
1110 return -EMSGSIZE;
1111
1da177e4
LT		 1112 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1113
1114 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1115 return err;
1116
1117 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1118
1119 /*
1120 * Put the data on the end
1121 */
1da177e4 1122
eeeb0374
ACM		 1123 skb_reset_transport_header(skb);
1124 skb_put(skb, len);
1da177e4 1125
6ce8e9ce 1126 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1da177e4
LT		 1127 if (err) {
1128 kfree_skb(skb);
1129 return err;
1130 }
1131
1132 /*
1133 * If the Q BIT Include socket option is in force, the first
1134 * byte of the user data is the logical value of the Q Bit.
1135 */
1136 if (rose->qbitincl) {
1137 qbit = skb->data[0];
1138 skb_pull(skb, 1);
1139 }
1140
1141 /*
1142 * Push down the ROSE header
1143 */
1144 asmptr = skb_push(skb, ROSE_MIN_LEN);
1145
1da177e4
LT		 1146 /* Build a ROSE Network header */
1147 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1148 asmptr[1] = (rose->lci >> 0) & 0xFF;
1149 asmptr[2] = ROSE_DATA;
1150
1151 if (qbit)
1152 asmptr[0] |= ROSE_Q_BIT;
1153
1da177e4
LT		 1154 if (sk->sk_state != TCP_ESTABLISHED) {
1155 kfree_skb(skb);
1156 return -ENOTCONN;
1157 }
1158
1159#ifdef M_BIT
1160#define ROSE_PACLEN (256-ROSE_MIN_LEN)
1161 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1162 unsigned char header[ROSE_MIN_LEN];
1163 struct sk_buff *skbn;
1164 int frontlen;
1165 int lg;
1166
1167 /* Save a copy of the Header */
d626f62b 1168 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1da177e4
LT		 1169 skb_pull(skb, ROSE_MIN_LEN);
1170
1171 frontlen = skb_headroom(skb);
1172
1173 while (skb->len > 0) {
1174 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1175 kfree_skb(skb);
1176 return err;
1177 }
1178
1179 skbn->sk = sk;
1180 skbn->free = 1;
1181 skbn->arp = 1;
1182
1183 skb_reserve(skbn, frontlen);
1184
1185 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1186
1187 /* Copy the user data */
d626f62b 1188 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1da177e4
LT		 1189 skb_pull(skb, lg);
1190
1191 /* Duplicate the Header */
1192 skb_push(skbn, ROSE_MIN_LEN);
27d7ff46 1193 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1da177e4
LT		 1194
1195 if (skb->len > 0)
1196 skbn->data[2] |= M_BIT;
1197
1198 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1199 }
1200
1201 skb->free = 1;
1202 kfree_skb(skb);
1203 } else {
1204 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1205 }
1206#else
1207 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1208#endif
1209
1210 rose_kick(sk);
1211
1212 return len;
1213}
1214
1215
1b784140
YX		 1216static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1217 int flags)
1da177e4
LT		 1218{
1219 struct sock *sk = sock->sk;
1220 struct rose_sock *rose = rose_sk(sk);
1da177e4
LT		 1221 size_t copied;
1222 unsigned char *asmptr;
1223 struct sk_buff *skb;
1224 int n, er, qbit;
1225
1226 /*
1227 * This works for seqpacket too. The receiver has ordered the queue for
1228 * us! We do one quick check first though
1229 */
1230 if (sk->sk_state != TCP_ESTABLISHED)
1231 return -ENOTCONN;
1232
1233 /* Now we can treat all alike */
1234 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1235 return er;
1236
1237 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1238
1239 skb_pull(skb, ROSE_MIN_LEN);
1240
1241 if (rose->qbitincl) {
1242 asmptr = skb_push(skb, 1);
1243 *asmptr = qbit;
1244 }
1245
badff6d0 1246 skb_reset_transport_header(skb);
1da177e4
LT		 1247 copied = skb->len;
1248
1249 if (copied > size) {
1250 copied = size;
1251 msg->msg_flags |= MSG_TRUNC;
1252 }
1253
51f3d02b 1254 skb_copy_datagram_msg(skb, 0, msg, copied);
1da177e4 1255
f3d33426
HFS		 1256 if (msg->msg_name) {
1257 struct sockaddr_rose *srose;
342dfc30
SH		 1258 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1259 msg->msg_name);
f3d33426
HFS		 1260
1261 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1262 srose = msg->msg_name;
1da177e4
LT		 1263 srose->srose_family = AF_ROSE;
1264 srose->srose_addr = rose->dest_addr;
1265 srose->srose_call = rose->dest_call;
1266 srose->srose_ndigis = rose->dest_ndigis;
f81152e3
FW		 1267 for (n = 0 ; n < rose->dest_ndigis ; n++)
1268 full_srose->srose_digis[n] = rose->dest_digis[n];
1269 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1da177e4
LT		 1270 }
1271
1272 skb_free_datagram(sk, skb);
1273
1274 return copied;
1275}
1276
1277
1278static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1279{
1280 struct sock *sk = sock->sk;
1281 struct rose_sock *rose = rose_sk(sk);
1282 void __user *argp = (void __user *)arg;
1283
1284 switch (cmd) {
1285 case TIOCOUTQ: {
1286 long amount;
31e6d363
ED		 1287
1288 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1da177e4
LT		 1289 if (amount < 0)
1290 amount = 0;
20b7d10a 1291 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1292 }
1293
1294 case TIOCINQ: {
1295 struct sk_buff *skb;
1296 long amount = 0L;
1297 /* These two are safe on a single CPU system as only user tasks fiddle here */
1298 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1299 amount = skb->len;
20b7d10a 1300 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1301 }
1302
1303 case SIOCGSTAMP:
20b7d10a 1304 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1da177e4 1305
ae40eb1e
ED		 1306 case SIOCGSTAMPNS:
1307 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1308
1da177e4
LT		 1309 case SIOCGIFADDR:
1310 case SIOCSIFADDR:
1311 case SIOCGIFDSTADDR:
1312 case SIOCSIFDSTADDR:
1313 case SIOCGIFBRDADDR:
1314 case SIOCSIFBRDADDR:
1315 case SIOCGIFNETMASK:
1316 case SIOCSIFNETMASK:
1317 case SIOCGIFMETRIC:
1318 case SIOCSIFMETRIC:
1319 return -EINVAL;
1320
1321 case SIOCADDRT:
1322 case SIOCDELRT:
1323 case SIOCRSCLRRT:
1324 if (!capable(CAP_NET_ADMIN))
1325 return -EPERM;
1326 return rose_rt_ioctl(cmd, argp);
1327
1328 case SIOCRSGCAUSE: {
1329 struct rose_cause_struct rose_cause;
1330 rose_cause.cause = rose->cause;
1331 rose_cause.diagnostic = rose->diagnostic;
1332 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1333 }
1334
1335 case SIOCRSSCAUSE: {
1336 struct rose_cause_struct rose_cause;
1337 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1338 return -EFAULT;
1339 rose->cause = rose_cause.cause;
1340 rose->diagnostic = rose_cause.diagnostic;
1341 return 0;
1342 }
1343
1344 case SIOCRSSL2CALL:
1345 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1346 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1347 ax25_listen_release(&rose_callsign, NULL);
1348 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1349 return -EFAULT;
1350 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
81dcd169
RB		 1351 return ax25_listen_register(&rose_callsign, NULL);
1352
1da177e4
LT		 1353 return 0;
1354
1355 case SIOCRSGL2CALL:
1356 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1357
1358 case SIOCRSACCEPT:
1359 if (rose->state == ROSE_STATE_5) {
1360 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1361 rose_start_idletimer(sk);
1362 rose->condition = 0x00;
1363 rose->vs = 0;
1364 rose->va = 0;
1365 rose->vr = 0;
1366 rose->vl = 0;
1367 rose->state = ROSE_STATE_3;
1368 }
1369 return 0;
1370
1371 default:
b5e5fa5e 1372 return -ENOIOCTLCMD;
1da177e4
LT		 1373 }
1374
1375 return 0;
1376}
1377
1378#ifdef CONFIG_PROC_FS
1379static void *rose_info_start(struct seq_file *seq, loff_t *pos)
95b7d924 1380 __acquires(rose_list_lock)
1da177e4 1381{
1da177e4 1382 spin_lock_bh(&rose_list_lock);
b999748a 1383 return seq_hlist_start_head(&rose_list, *pos);
1da177e4
LT		 1384}
1385
1386static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1387{
b999748a 1388 return seq_hlist_next(v, &rose_list, pos);
1da177e4 1389}
3dcf7c5e 1390
1da177e4 1391static void rose_info_stop(struct seq_file *seq, void *v)
95b7d924 1392 __releases(rose_list_lock)
1da177e4
LT		 1393{
1394 spin_unlock_bh(&rose_list_lock);
1395}
1396
1397static int rose_info_show(struct seq_file *seq, void *v)
1398{
dcf777f6 1399 char buf[11], rsbuf[11];
f75268cd 1400
1da177e4 1401 if (v == SEQ_START_TOKEN)
3dcf7c5e 1402 seq_puts(seq,
1da177e4
LT		 1403 "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");
1404
1405 else {
b999748a 1406 struct sock *s = sk_entry(v);
1da177e4
LT		 1407 struct rose_sock *rose = rose_sk(s);
1408 const char *devname, *callsign;
1409 const struct net_device *dev = rose->device;
1410
1411 if (!dev)
1412 devname = "???";
1413 else
1414 devname = dev->name;
3dcf7c5e 1415
1da177e4 1416 seq_printf(seq, "%-10s %-9s ",
dcf777f6
RB		 1417 rose2asc(rsbuf, &rose->dest_addr),
1418 ax2asc(buf, &rose->dest_call));
1da177e4
LT		 1419
1420 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1421 callsign = "??????-?";
1422 else
f75268cd 1423 callsign = ax2asc(buf, &rose->source_call);
1da177e4
LT		 1424
1425 seq_printf(seq,
1426 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
dcf777f6 1427 rose2asc(rsbuf, &rose->source_addr),
1da177e4
LT		 1428 callsign,
1429 devname,
1430 rose->lci & 0x0FFF,
1431 (rose->neighbour) ? rose->neighbour->number : 0,
1432 rose->state,
1433 rose->vs,
1434 rose->vr,
1435 rose->va,
1436 ax25_display_timer(&rose->timer) / HZ,
1437 rose->t1 / HZ,
1438 rose->t2 / HZ,
1439 rose->t3 / HZ,
1440 rose->hb / HZ,
1441 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1442 rose->idle / (60 * HZ),
31e6d363
ED		 1443 sk_wmem_alloc_get(s),
1444 sk_rmem_alloc_get(s),
1da177e4
LT		 1445 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1446 }
1447
1448 return 0;
1449}
1450
56b3d975 1451static const struct seq_operations rose_info_seqops = {
1da177e4
LT		 1452 .start = rose_info_start,
1453 .next = rose_info_next,
1454 .stop = rose_info_stop,
1455 .show = rose_info_show,
1456};
1457
1458static int rose_info_open(struct inode *inode, struct file *file)
1459{
1460 return seq_open(file, &rose_info_seqops);
1461}
1462
da7071d7 1463static const struct file_operations rose_info_fops = {
1da177e4
LT		 1464 .owner = THIS_MODULE,
1465 .open = rose_info_open,
1466 .read = seq_read,
1467 .llseek = seq_lseek,
1468 .release = seq_release,
1469};
1470#endif /* CONFIG_PROC_FS */
1471
ec1b4cf7 1472static const struct net_proto_family rose_family_ops = {
1da177e4
LT		 1473 .family = PF_ROSE,
1474 .create = rose_create,
1475 .owner = THIS_MODULE,
1476};
1477
5708e868 1478static const struct proto_ops rose_proto_ops = {
1da177e4
LT		 1479 .family = PF_ROSE,
1480 .owner = THIS_MODULE,
1481 .release = rose_release,
1482 .bind = rose_bind,
1483 .connect = rose_connect,
1484 .socketpair = sock_no_socketpair,
1485 .accept = rose_accept,
1486 .getname = rose_getname,
1487 .poll = datagram_poll,
1488 .ioctl = rose_ioctl,
1489 .listen = rose_listen,
1490 .shutdown = sock_no_shutdown,
1491 .setsockopt = rose_setsockopt,
1492 .getsockopt = rose_getsockopt,
1493 .sendmsg = rose_sendmsg,
1494 .recvmsg = rose_recvmsg,
1495 .mmap = sock_no_mmap,
1496 .sendpage = sock_no_sendpage,
1497};
1498
1499static struct notifier_block rose_dev_notifier = {
1500 .notifier_call = rose_device_event,
1501};
1502
1503static struct net_device **dev_rose;
1504
8d5cf596
RB		 1505static struct ax25_protocol rose_pid = {
1506 .pid = AX25_P_ROSE,
1507 .func = rose_route_frame
1508};
1509
a4282717
RB		 1510static struct ax25_linkfail rose_linkfail_notifier = {
1511 .func = rose_link_failed
1512};
1513
1da177e4
LT		 1514static int __init rose_proto_init(void)
1515{
1516 int i;
a83cd2cc 1517 int rc;
1da177e4 1518
a83cd2cc
AD		 1519 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1520 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1521 rc = -EINVAL;
1522 goto out;
1523 }
1524
1525 rc = proto_register(&rose_proto, 0);
1da177e4
LT		 1526 if (rc != 0)
1527 goto out;
1528
1529 rose_callsign = null_ax25_address;
1530
1b30dd35 1531 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1da177e4
LT		 1532 if (dev_rose == NULL) {
1533 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
a83cd2cc
AD		 1534 rc = -ENOMEM;
1535 goto out_proto_unregister;
1da177e4
LT		 1536 }
1537
1da177e4
LT		 1538 for (i = 0; i < rose_ndevs; i++) {
1539 struct net_device *dev;
1540 char name[IFNAMSIZ];
1541
1542 sprintf(name, "rose%d", i);
c835a677 1543 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1da177e4
LT		 1544 if (!dev) {
1545 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
70ff3b66 1546 rc = -ENOMEM;
1da177e4
LT		 1547 goto fail;
1548 }
70ff3b66
AD		 1549 rc = register_netdev(dev);
1550 if (rc) {
520d1b83 1551 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1da177e4
LT		 1552 free_netdev(dev);
1553 goto fail;
1554 }
c773e847 1555 rose_set_lockdep_key(dev);
1da177e4
LT		 1556 dev_rose[i] = dev;
1557 }
1558
1559 sock_register(&rose_family_ops);
1560 register_netdevice_notifier(&rose_dev_notifier);
1da177e4 1561
8d5cf596 1562 ax25_register_pid(&rose_pid);
a4282717 1563 ax25_linkfail_register(&rose_linkfail_notifier);
1da177e4
LT		 1564
1565#ifdef CONFIG_SYSCTL
1566 rose_register_sysctl();
1567#endif
1568 rose_loopback_init();
1569
1570 rose_add_loopback_neigh();
1571
d4beaa66
G		 1572 proc_create("rose", S_IRUGO, init_net.proc_net, &rose_info_fops);
1573 proc_create("rose_neigh", S_IRUGO, init_net.proc_net,
1574 &rose_neigh_fops);
1575 proc_create("rose_nodes", S_IRUGO, init_net.proc_net,
1576 &rose_nodes_fops);
1577 proc_create("rose_routes", S_IRUGO, init_net.proc_net,
1578 &rose_routes_fops);
1da177e4
LT		 1579out:
1580 return rc;
1581fail:
1582 while (--i >= 0) {
1583 unregister_netdev(dev_rose[i]);
1584 free_netdev(dev_rose[i]);
1585 }
1586 kfree(dev_rose);
a83cd2cc 1587out_proto_unregister:
1da177e4 1588 proto_unregister(&rose_proto);
70ff3b66 1589 goto out;
1da177e4
LT		 1590}
1591module_init(rose_proto_init);
1592
1593module_param(rose_ndevs, int, 0);
1594MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1595
1596MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1597MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1598MODULE_LICENSE("GPL");
1599MODULE_ALIAS_NETPROTO(PF_ROSE);
1600
1601static void __exit rose_exit(void)
1602{
1603 int i;
1604
ece31ffd
G		 1605 remove_proc_entry("rose", init_net.proc_net);
1606 remove_proc_entry("rose_neigh", init_net.proc_net);
1607 remove_proc_entry("rose_nodes", init_net.proc_net);
1608 remove_proc_entry("rose_routes", init_net.proc_net);
1da177e4
LT		 1609 rose_loopback_clear();
1610
1611 rose_rt_free();
1612
1613 ax25_protocol_release(AX25_P_ROSE);
a4282717 1614 ax25_linkfail_release(&rose_linkfail_notifier);
1da177e4
LT		 1615
1616 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1617 ax25_listen_release(&rose_callsign, NULL);
1618
1619#ifdef CONFIG_SYSCTL
1620 rose_unregister_sysctl();
1621#endif
1622 unregister_netdevice_notifier(&rose_dev_notifier);
1623
1624 sock_unregister(PF_ROSE);
1625
1626 for (i = 0; i < rose_ndevs; i++) {
1627 struct net_device *dev = dev_rose[i];
1628
1629 if (dev) {
1630 unregister_netdev(dev);
1631 free_netdev(dev);
1632 }
1633 }
1634
1635 kfree(dev_rose);
1636 proto_unregister(&rose_proto);
1637}
1638
1639module_exit(rose_exit);
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