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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[linux-block.git] / net / rose / af_rose.c
CommitLineData
2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 2/*
1da177e4
LT		 3 *
4 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
5 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
6 * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
7 * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
8 */
4fc268d2 9
4fc268d2 10#include <linux/capability.h>
1da177e4
LT		 11#include <linux/module.h>
12#include <linux/moduleparam.h>
13#include <linux/init.h>
14#include <linux/errno.h>
15#include <linux/types.h>
16#include <linux/socket.h>
17#include <linux/in.h>
5a0e3ad6 18#include <linux/slab.h>
1da177e4 19#include <linux/kernel.h>
3f07c014 20#include <linux/sched/signal.h>
1da177e4
LT		 21#include <linux/spinlock.h>
22#include <linux/timer.h>
23#include <linux/string.h>
24#include <linux/sockios.h>
25#include <linux/net.h>
26#include <linux/stat.h>
457c4cbc 27#include <net/net_namespace.h>
1da177e4
LT		 28#include <net/ax25.h>
29#include <linux/inet.h>
30#include <linux/netdevice.h>
31#include <linux/if_arp.h>
32#include <linux/skbuff.h>
33#include <net/sock.h>
7c0f6ba6 34#include <linux/uaccess.h>
1da177e4
LT		 35#include <linux/fcntl.h>
36#include <linux/termios.h>
37#include <linux/mm.h>
38#include <linux/interrupt.h>
39#include <linux/notifier.h>
40#include <net/rose.h>
41#include <linux/proc_fs.h>
42#include <linux/seq_file.h>
c752f073 43#include <net/tcp_states.h>
1da177e4
LT		 44#include <net/ip.h>
45#include <net/arp.h>
46
47static int rose_ndevs = 10;
48
49int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
50int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
51int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
52int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
53int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
54int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
55int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
56int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
57int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
58int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
59
60static HLIST_HEAD(rose_list);
61static DEFINE_SPINLOCK(rose_list_lock);
62
5708e868 63static const struct proto_ops rose_proto_ops;
1da177e4
LT		 64
65ax25_address rose_callsign;
66
67/*
68 * Convert a ROSE address into text.
69 */
dcf777f6 70char *rose2asc(char *buf, const rose_address *addr)
1da177e4 71{
1da177e4
LT		 72 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
73 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
74 addr->rose_addr[4] == 0x00) {
dcf777f6 75 strcpy(buf, "*");
1da177e4 76 } else {
dcf777f6 77 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
1da177e4
LT		 78 addr->rose_addr[1] & 0xFF,
79 addr->rose_addr[2] & 0xFF,
80 addr->rose_addr[3] & 0xFF,
81 addr->rose_addr[4] & 0xFF);
82 }
83
dcf777f6 84 return buf;
1da177e4
LT		 85}
86
87/*
88 * Compare two ROSE addresses, 0 == equal.
89 */
90int rosecmp(rose_address *addr1, rose_address *addr2)
91{
92 int i;
93
94 for (i = 0; i < 5; i++)
95 if (addr1->rose_addr[i] != addr2->rose_addr[i])
96 return 1;
97
98 return 0;
99}
100
101/*
102 * Compare two ROSE addresses for only mask digits, 0 == equal.
103 */
104int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
105{
95b7d924 106 unsigned int i, j;
1da177e4
LT		 107
108 if (mask > 10)
109 return 1;
110
111 for (i = 0; i < mask; i++) {
112 j = i / 2;
113
114 if ((i % 2) != 0) {
115 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
116 return 1;
117 } else {
118 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
119 return 1;
120 }
121 }
122
123 return 0;
124}
125
126/*
127 * Socket removal during an interrupt is now safe.
128 */
129static void rose_remove_socket(struct sock *sk)
130{
131 spin_lock_bh(&rose_list_lock);
132 sk_del_node_init(sk);
133 spin_unlock_bh(&rose_list_lock);
134}
135
136/*
137 * Kill all bound sockets on a broken link layer connection to a
138 * particular neighbour.
139 */
140void rose_kill_by_neigh(struct rose_neigh *neigh)
141{
142 struct sock *s;
1da177e4
LT		 143
144 spin_lock_bh(&rose_list_lock);
b67bfe0d 145 sk_for_each(s, &rose_list) {
1da177e4
LT		 146 struct rose_sock *rose = rose_sk(s);
147
148 if (rose->neighbour == neigh) {
149 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
150 rose->neighbour->use--;
151 rose->neighbour = NULL;
152 }
153 }
154 spin_unlock_bh(&rose_list_lock);
155}
156
157/*
158 * Kill all bound sockets on a dropped device.
159 */
160static void rose_kill_by_device(struct net_device *dev)
161{
162 struct sock *s;
1da177e4
LT		 163
164 spin_lock_bh(&rose_list_lock);
b67bfe0d 165 sk_for_each(s, &rose_list) {
1da177e4
LT		 166 struct rose_sock *rose = rose_sk(s);
167
168 if (rose->device == dev) {
169 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
d496f784
RB		 170 if (rose->neighbour)
171 rose->neighbour->use--;
1da177e4
LT		 172 rose->device = NULL;
173 }
174 }
175 spin_unlock_bh(&rose_list_lock);
176}
177
178/*
179 * Handle device status changes.
180 */
351638e7
JP		 181static int rose_device_event(struct notifier_block *this,
182 unsigned long event, void *ptr)
1da177e4 183{
351638e7 184 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1da177e4 185
721499e8 186 if (!net_eq(dev_net(dev), &init_net))
e9dc8653
EB		 187 return NOTIFY_DONE;
188
1da177e4
LT		 189 if (event != NETDEV_DOWN)
190 return NOTIFY_DONE;
191
192 switch (dev->type) {
193 case ARPHRD_ROSE:
194 rose_kill_by_device(dev);
195 break;
196 case ARPHRD_AX25:
197 rose_link_device_down(dev);
198 rose_rt_device_down(dev);
199 break;
200 }
201
202 return NOTIFY_DONE;
203}
204
205/*
206 * Add a socket to the bound sockets list.
207 */
208static void rose_insert_socket(struct sock *sk)
209{
210
211 spin_lock_bh(&rose_list_lock);
212 sk_add_node(sk, &rose_list);
213 spin_unlock_bh(&rose_list_lock);
214}
215
216/*
217 * Find a socket that wants to accept the Call Request we just
218 * received.
219 */
220static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
221{
222 struct sock *s;
1da177e4
LT		 223
224 spin_lock_bh(&rose_list_lock);
b67bfe0d 225 sk_for_each(s, &rose_list) {
1da177e4
LT		 226 struct rose_sock *rose = rose_sk(s);
227
228 if (!rosecmp(&rose->source_addr, addr) &&
229 !ax25cmp(&rose->source_call, call) &&
230 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
231 goto found;
232 }
233
b67bfe0d 234 sk_for_each(s, &rose_list) {
1da177e4
LT		 235 struct rose_sock *rose = rose_sk(s);
236
237 if (!rosecmp(&rose->source_addr, addr) &&
238 !ax25cmp(&rose->source_call, &null_ax25_address) &&
239 s->sk_state == TCP_LISTEN)
240 goto found;
241 }
242 s = NULL;
243found:
244 spin_unlock_bh(&rose_list_lock);
245 return s;
246}
247
248/*
249 * Find a connected ROSE socket given my LCI and device.
250 */
251struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
252{
253 struct sock *s;
1da177e4
LT		 254
255 spin_lock_bh(&rose_list_lock);
b67bfe0d 256 sk_for_each(s, &rose_list) {
1da177e4
LT		 257 struct rose_sock *rose = rose_sk(s);
258
259 if (rose->lci == lci && rose->neighbour == neigh)
260 goto found;
261 }
262 s = NULL;
263found:
264 spin_unlock_bh(&rose_list_lock);
265 return s;
266}
267
268/*
269 * Find a unique LCI for a given device.
270 */
271unsigned int rose_new_lci(struct rose_neigh *neigh)
272{
273 int lci;
274
275 if (neigh->dce_mode) {
276 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
277 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
278 return lci;
279 } else {
280 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
281 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
282 return lci;
283 }
284
285 return 0;
286}
287
288/*
289 * Deferred destroy.
290 */
291void rose_destroy_socket(struct sock *);
292
293/*
294 * Handler for deferred kills.
295 */
4966babd 296static void rose_destroy_timer(struct timer_list *t)
1da177e4 297{
4966babd
KC		 298 struct sock *sk = from_timer(sk, t, sk_timer);
299
300 rose_destroy_socket(sk);
1da177e4
LT		 301}
302
303/*
304 * This is called from user mode and the timers. Thus it protects itself
305 * against interrupt users but doesn't worry about being called during
306 * work. Once it is removed from the queue no interrupt or bottom half
307 * will touch it and we are (fairly 8-) ) safe.
308 */
309void rose_destroy_socket(struct sock *sk)
310{
311 struct sk_buff *skb;
312
313 rose_remove_socket(sk);
314 rose_stop_heartbeat(sk);
315 rose_stop_idletimer(sk);
316 rose_stop_timer(sk);
317
318 rose_clear_queues(sk); /* Flush the queues */
319
320 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
321 if (skb->sk != sk) { /* A pending connection */
322 /* Queue the unaccepted socket for death */
323 sock_set_flag(skb->sk, SOCK_DEAD);
324 rose_start_heartbeat(skb->sk);
325 rose_sk(skb->sk)->state = ROSE_STATE_0;
326 }
327
328 kfree_skb(skb);
329 }
330
c564039f 331 if (sk_has_allocations(sk)) {
1da177e4 332 /* Defer: outstanding buffers */
4966babd 333 timer_setup(&sk->sk_timer, rose_destroy_timer, 0);
1da177e4 334 sk->sk_timer.expires = jiffies + 10 * HZ;
1da177e4
LT		 335 add_timer(&sk->sk_timer);
336 } else
337 sock_put(sk);
338}
339
340/*
341 * Handling for system calls applied via the various interfaces to a
342 * ROSE socket object.
343 */
344
345static int rose_setsockopt(struct socket *sock, int level, int optname,
b7058842 346 char __user *optval, unsigned int optlen)
1da177e4
LT		 347{
348 struct sock *sk = sock->sk;
349 struct rose_sock *rose = rose_sk(sk);
350 int opt;
351
352 if (level != SOL_ROSE)
353 return -ENOPROTOOPT;
354
355 if (optlen < sizeof(int))
356 return -EINVAL;
357
358 if (get_user(opt, (int __user *)optval))
359 return -EFAULT;
360
361 switch (optname) {
362 case ROSE_DEFER:
363 rose->defer = opt ? 1 : 0;
364 return 0;
365
366 case ROSE_T1:
367 if (opt < 1)
368 return -EINVAL;
369 rose->t1 = opt * HZ;
370 return 0;
371
372 case ROSE_T2:
373 if (opt < 1)
374 return -EINVAL;
375 rose->t2 = opt * HZ;
376 return 0;
377
378 case ROSE_T3:
379 if (opt < 1)
380 return -EINVAL;
381 rose->t3 = opt * HZ;
382 return 0;
383
384 case ROSE_HOLDBACK:
385 if (opt < 1)
386 return -EINVAL;
387 rose->hb = opt * HZ;
388 return 0;
389
390 case ROSE_IDLE:
391 if (opt < 0)
392 return -EINVAL;
393 rose->idle = opt * 60 * HZ;
394 return 0;
395
396 case ROSE_QBITINCL:
397 rose->qbitincl = opt ? 1 : 0;
398 return 0;
399
400 default:
401 return -ENOPROTOOPT;
402 }
403}
404
405static int rose_getsockopt(struct socket *sock, int level, int optname,
406 char __user *optval, int __user *optlen)
407{
408 struct sock *sk = sock->sk;
409 struct rose_sock *rose = rose_sk(sk);
410 int val = 0;
411 int len;
412
413 if (level != SOL_ROSE)
414 return -ENOPROTOOPT;
415
416 if (get_user(len, optlen))
417 return -EFAULT;
418
419 if (len < 0)
420 return -EINVAL;
421
422 switch (optname) {
423 case ROSE_DEFER:
424 val = rose->defer;
425 break;
426
427 case ROSE_T1:
428 val = rose->t1 / HZ;
429 break;
430
431 case ROSE_T2:
432 val = rose->t2 / HZ;
433 break;
434
435 case ROSE_T3:
436 val = rose->t3 / HZ;
437 break;
438
439 case ROSE_HOLDBACK:
440 val = rose->hb / HZ;
441 break;
442
443 case ROSE_IDLE:
444 val = rose->idle / (60 * HZ);
445 break;
446
447 case ROSE_QBITINCL:
448 val = rose->qbitincl;
449 break;
450
451 default:
452 return -ENOPROTOOPT;
453 }
454
455 len = min_t(unsigned int, len, sizeof(int));
456
457 if (put_user(len, optlen))
458 return -EFAULT;
459
460 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
461}
462
463static int rose_listen(struct socket *sock, int backlog)
464{
465 struct sock *sk = sock->sk;
466
467 if (sk->sk_state != TCP_LISTEN) {
468 struct rose_sock *rose = rose_sk(sk);
469
470 rose->dest_ndigis = 0;
471 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
472 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
473 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
474 sk->sk_max_ack_backlog = backlog;
475 sk->sk_state = TCP_LISTEN;
476 return 0;
477 }
478
479 return -EOPNOTSUPP;
480}
481
482static struct proto rose_proto = {
483 .name = "ROSE",
484 .owner = THIS_MODULE,
485 .obj_size = sizeof(struct rose_sock),
486};
487
3f378b68
EP		 488static int rose_create(struct net *net, struct socket *sock, int protocol,
489 int kern)
1da177e4
LT		 490{
491 struct sock *sk;
492 struct rose_sock *rose;
493
09ad9bc7 494 if (!net_eq(net, &init_net))
1b8d7ae4
EB		 495 return -EAFNOSUPPORT;
496
1da177e4
LT		 497 if (sock->type != SOCK_SEQPACKET || protocol != 0)
498 return -ESOCKTNOSUPPORT;
499
11aa9c28 500 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
6257ff21 501 if (sk == NULL)
1da177e4
LT		 502 return -ENOMEM;
503
504 rose = rose_sk(sk);
505
506 sock_init_data(sock, sk);
507
508 skb_queue_head_init(&rose->ack_queue);
509#ifdef M_BIT
510 skb_queue_head_init(&rose->frag_queue);
511 rose->fraglen = 0;
512#endif
513
514 sock->ops = &rose_proto_ops;
515 sk->sk_protocol = protocol;
516
4966babd
KC		 517 timer_setup(&rose->timer, NULL, 0);
518 timer_setup(&rose->idletimer, NULL, 0);
1da177e4 519
82e84249
RB		 520 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
521 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
522 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
523 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
524 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
1da177e4
LT		 525
526 rose->state = ROSE_STATE_0;
527
528 return 0;
529}
530
531static struct sock *rose_make_new(struct sock *osk)
532{
533 struct sock *sk;
534 struct rose_sock *rose, *orose;
535
536 if (osk->sk_type != SOCK_SEQPACKET)
537 return NULL;
538
11aa9c28 539 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
6257ff21 540 if (sk == NULL)
1da177e4
LT		 541 return NULL;
542
543 rose = rose_sk(sk);
544
545 sock_init_data(NULL, sk);
546
547 skb_queue_head_init(&rose->ack_queue);
548#ifdef M_BIT
549 skb_queue_head_init(&rose->frag_queue);
550 rose->fraglen = 0;
551#endif
552
553 sk->sk_type = osk->sk_type;
1da177e4
LT		 554 sk->sk_priority = osk->sk_priority;
555 sk->sk_protocol = osk->sk_protocol;
556 sk->sk_rcvbuf = osk->sk_rcvbuf;
557 sk->sk_sndbuf = osk->sk_sndbuf;
558 sk->sk_state = TCP_ESTABLISHED;
53b924b3 559 sock_copy_flags(sk, osk);
1da177e4 560
4966babd
KC		 561 timer_setup(&rose->timer, NULL, 0);
562 timer_setup(&rose->idletimer, NULL, 0);
1da177e4
LT		 563
564 orose = rose_sk(osk);
565 rose->t1 = orose->t1;
566 rose->t2 = orose->t2;
567 rose->t3 = orose->t3;
568 rose->hb = orose->hb;
569 rose->idle = orose->idle;
570 rose->defer = orose->defer;
571 rose->device = orose->device;
572 rose->qbitincl = orose->qbitincl;
573
574 return sk;
575}
576
577static int rose_release(struct socket *sock)
578{
579 struct sock *sk = sock->sk;
580 struct rose_sock *rose;
581
582 if (sk == NULL) return 0;
583
4965291a
JP		 584 sock_hold(sk);
585 sock_orphan(sk);
586 lock_sock(sk);
1da177e4
LT		 587 rose = rose_sk(sk);
588
589 switch (rose->state) {
590 case ROSE_STATE_0:
4965291a 591 release_sock(sk);
1da177e4 592 rose_disconnect(sk, 0, -1, -1);
4965291a 593 lock_sock(sk);
1da177e4
LT		 594 rose_destroy_socket(sk);
595 break;
596
597 case ROSE_STATE_2:
598 rose->neighbour->use--;
4965291a 599 release_sock(sk);
1da177e4 600 rose_disconnect(sk, 0, -1, -1);
4965291a 601 lock_sock(sk);
1da177e4
LT		 602 rose_destroy_socket(sk);
603 break;
604
605 case ROSE_STATE_1:
606 case ROSE_STATE_3:
607 case ROSE_STATE_4:
608 case ROSE_STATE_5:
609 rose_clear_queues(sk);
610 rose_stop_idletimer(sk);
611 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
612 rose_start_t3timer(sk);
613 rose->state = ROSE_STATE_2;
614 sk->sk_state = TCP_CLOSE;
615 sk->sk_shutdown |= SEND_SHUTDOWN;
616 sk->sk_state_change(sk);
617 sock_set_flag(sk, SOCK_DEAD);
618 sock_set_flag(sk, SOCK_DESTROY);
619 break;
620
621 default:
622 break;
623 }
624
625 sock->sk = NULL;
4965291a
JP		 626 release_sock(sk);
627 sock_put(sk);
1da177e4
LT		 628
629 return 0;
630}
631
632static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
633{
634 struct sock *sk = sock->sk;
635 struct rose_sock *rose = rose_sk(sk);
636 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
637 struct net_device *dev;
01d7dd0e
RB		 638 ax25_address *source;
639 ax25_uid_assoc *user;
1da177e4
LT		 640 int n;
641
642 if (!sock_flag(sk, SOCK_ZAPPED))
643 return -EINVAL;
644
645 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
646 return -EINVAL;
647
648 if (addr->srose_family != AF_ROSE)
649 return -EINVAL;
650
651 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
652 return -EINVAL;
653
9828e6e6 654 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
1da177e4
LT		 655 return -EINVAL;
656
8849b720 657 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
1da177e4 658 return -EADDRNOTAVAIL;
1da177e4
LT		 659
660 source = &addr->srose_call;
661
c2a2b8d3 662 user = ax25_findbyuid(current_euid());
01d7dd0e
RB		 663 if (user) {
664 rose->source_call = user->call;
665 ax25_uid_put(user);
666 } else {
3b9c9f3b
Y		 667 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
668 dev_put(dev);
1da177e4 669 return -EACCES;
3b9c9f3b 670 }
01d7dd0e 671 rose->source_call = *source;
1da177e4
LT		 672 }
673
674 rose->source_addr = addr->srose_addr;
1da177e4
LT		 675 rose->device = dev;
676 rose->source_ndigis = addr->srose_ndigis;
677
678 if (addr_len == sizeof(struct full_sockaddr_rose)) {
679 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
680 for (n = 0 ; n < addr->srose_ndigis ; n++)
681 rose->source_digis[n] = full_addr->srose_digis[n];
682 } else {
683 if (rose->source_ndigis == 1) {
684 rose->source_digis[0] = addr->srose_digi;
685 }
686 }
687
688 rose_insert_socket(sk);
689
690 sock_reset_flag(sk, SOCK_ZAPPED);
8849b720 691
1da177e4
LT		 692 return 0;
693}
694
695static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
696{
697 struct sock *sk = sock->sk;
698 struct rose_sock *rose = rose_sk(sk);
699 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
700 unsigned char cause, diagnostic;
1da177e4 701 struct net_device *dev;
01d7dd0e 702 ax25_uid_assoc *user;
2536b94a 703 int n, err = 0;
1da177e4
LT		 704
705 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
706 return -EINVAL;
707
708 if (addr->srose_family != AF_ROSE)
709 return -EINVAL;
710
711 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
712 return -EINVAL;
713
9828e6e6 714 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
1da177e4
LT		 715 return -EINVAL;
716
717 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
718 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
719 return -EINVAL;
720
2536b94a
RB		 721 lock_sock(sk);
722
723 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
724 /* Connect completed during a ERESTARTSYS event */
725 sock->state = SS_CONNECTED;
726 goto out_release;
727 }
728
729 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
730 sock->state = SS_UNCONNECTED;
731 err = -ECONNREFUSED;
732 goto out_release;
733 }
734
735 if (sk->sk_state == TCP_ESTABLISHED) {
736 /* No reconnect on a seqpacket socket */
737 err = -EISCONN;
738 goto out_release;
739 }
740
741 sk->sk_state = TCP_CLOSE;
742 sock->state = SS_UNCONNECTED;
743
1da177e4 744 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
fe2c802a 745 &diagnostic, 0);
43837b1e
BP		 746 if (!rose->neighbour) {
747 err = -ENETUNREACH;
748 goto out_release;
749 }
1da177e4
LT		 750
751 rose->lci = rose_new_lci(rose->neighbour);
2536b94a
RB		 752 if (!rose->lci) {
753 err = -ENETUNREACH;
754 goto out_release;
755 }
1da177e4
LT		 756
757 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
758 sock_reset_flag(sk, SOCK_ZAPPED);
759
2536b94a
RB		 760 if ((dev = rose_dev_first()) == NULL) {
761 err = -ENETUNREACH;
762 goto out_release;
763 }
1da177e4 764
c2a2b8d3 765 user = ax25_findbyuid(current_euid());
2536b94a
RB		 766 if (!user) {
767 err = -EINVAL;
768 goto out_release;
769 }
1da177e4
LT		 770
771 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
01d7dd0e 772 rose->source_call = user->call;
1da177e4 773 rose->device = dev;
01d7dd0e 774 ax25_uid_put(user);
1da177e4
LT		 775
776 rose_insert_socket(sk); /* Finish the bind */
777 }
1da177e4
LT		 778 rose->dest_addr = addr->srose_addr;
779 rose->dest_call = addr->srose_call;
780 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
781 rose->dest_ndigis = addr->srose_ndigis;
782
783 if (addr_len == sizeof(struct full_sockaddr_rose)) {
784 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
785 for (n = 0 ; n < addr->srose_ndigis ; n++)
786 rose->dest_digis[n] = full_addr->srose_digis[n];
787 } else {
788 if (rose->dest_ndigis == 1) {
789 rose->dest_digis[0] = addr->srose_digi;
790 }
791 }
792
793 /* Move to connecting socket, start sending Connect Requests */
794 sock->state = SS_CONNECTING;
795 sk->sk_state = TCP_SYN_SENT;
796
797 rose->state = ROSE_STATE_1;
798
799 rose->neighbour->use++;
800
801 rose_write_internal(sk, ROSE_CALL_REQUEST);
802 rose_start_heartbeat(sk);
803 rose_start_t1timer(sk);
804
805 /* Now the loop */
2536b94a
RB		 806 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
807 err = -EINPROGRESS;
808 goto out_release;
809 }
1da177e4
LT		 810
811 /*
812 * A Connect Ack with Choke or timeout or failed routing will go to
813 * closed.
814 */
815 if (sk->sk_state == TCP_SYN_SENT) {
75606dc6 816 DEFINE_WAIT(wait);
1da177e4 817
1da177e4 818 for (;;) {
aa395145 819 prepare_to_wait(sk_sleep(sk), &wait,
6140efb5 820 TASK_INTERRUPTIBLE);
1da177e4
LT		 821 if (sk->sk_state != TCP_SYN_SENT)
822 break;
75606dc6
RB		 823 if (!signal_pending(current)) {
824 release_sock(sk);
1da177e4 825 schedule();
2536b94a 826 lock_sock(sk);
1da177e4
LT		 827 continue;
828 }
75606dc6
RB		 829 err = -ERESTARTSYS;
830 break;
1da177e4 831 }
aa395145 832 finish_wait(sk_sleep(sk), &wait);
75606dc6
RB		 833
834 if (err)
835 goto out_release;
1da177e4
LT		 836 }
837
838 if (sk->sk_state != TCP_ESTABLISHED) {
839 sock->state = SS_UNCONNECTED;
2536b94a
RB		 840 err = sock_error(sk); /* Always set at this point */
841 goto out_release;
1da177e4
LT		 842 }
843
844 sock->state = SS_CONNECTED;
845
2536b94a
RB		 846out_release:
847 release_sock(sk);
848
849 return err;
1da177e4
LT		 850}
851
cdfbabfb
DH		 852static int rose_accept(struct socket *sock, struct socket *newsock, int flags,
853 bool kern)
1da177e4 854{
1da177e4
LT		 855 struct sk_buff *skb;
856 struct sock *newsk;
75606dc6 857 DEFINE_WAIT(wait);
1da177e4
LT		 858 struct sock *sk;
859 int err = 0;
860
861 if ((sk = sock->sk) == NULL)
862 return -EINVAL;
863
864 lock_sock(sk);
865 if (sk->sk_type != SOCK_SEQPACKET) {
866 err = -EOPNOTSUPP;
75606dc6 867 goto out_release;
1da177e4
LT		 868 }
869
870 if (sk->sk_state != TCP_LISTEN) {
871 err = -EINVAL;
75606dc6 872 goto out_release;
1da177e4
LT		 873 }
874
875 /*
876 * The write queue this time is holding sockets ready to use
877 * hooked into the SABM we saved
878 */
1da177e4 879 for (;;) {
aa395145 880 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
75606dc6 881
1da177e4
LT		 882 skb = skb_dequeue(&sk->sk_receive_queue);
883 if (skb)
884 break;
885
1da177e4 886 if (flags & O_NONBLOCK) {
75606dc6
RB		 887 err = -EWOULDBLOCK;
888 break;
1da177e4 889 }
75606dc6
RB		 890 if (!signal_pending(current)) {
891 release_sock(sk);
1da177e4
LT		 892 schedule();
893 lock_sock(sk);
894 continue;
895 }
75606dc6
RB		 896 err = -ERESTARTSYS;
897 break;
1da177e4 898 }
aa395145 899 finish_wait(sk_sleep(sk), &wait);
75606dc6
RB		 900 if (err)
901 goto out_release;
1da177e4
LT		 902
903 newsk = skb->sk;
44ccff1f 904 sock_graft(newsk, newsock);
1da177e4
LT		 905
906 /* Now attach up the new socket */
907 skb->sk = NULL;
908 kfree_skb(skb);
7976a11b 909 sk_acceptq_removed(sk);
1da177e4 910
75606dc6 911out_release:
1da177e4
LT		 912 release_sock(sk);
913
914 return err;
915}
916
917static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
9b2c45d4 918 int peer)
1da177e4
LT		 919{
920 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
921 struct sock *sk = sock->sk;
922 struct rose_sock *rose = rose_sk(sk);
923 int n;
924
17ac2e9c 925 memset(srose, 0, sizeof(*srose));
1da177e4
LT		 926 if (peer != 0) {
927 if (sk->sk_state != TCP_ESTABLISHED)
928 return -ENOTCONN;
929 srose->srose_family = AF_ROSE;
930 srose->srose_addr = rose->dest_addr;
931 srose->srose_call = rose->dest_call;
932 srose->srose_ndigis = rose->dest_ndigis;
933 for (n = 0; n < rose->dest_ndigis; n++)
934 srose->srose_digis[n] = rose->dest_digis[n];
935 } else {
936 srose->srose_family = AF_ROSE;
937 srose->srose_addr = rose->source_addr;
938 srose->srose_call = rose->source_call;
939 srose->srose_ndigis = rose->source_ndigis;
940 for (n = 0; n < rose->source_ndigis; n++)
941 srose->srose_digis[n] = rose->source_digis[n];
942 }
943
9b2c45d4 944 return sizeof(struct full_sockaddr_rose);
1da177e4
LT		 945}
946
947int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
948{
949 struct sock *sk;
950 struct sock *make;
951 struct rose_sock *make_rose;
952 struct rose_facilities_struct facilities;
e0bccd31 953 int n;
1da177e4
LT		 954
955 skb->sk = NULL; /* Initially we don't know who it's for */
956
957 /*
958 * skb->data points to the rose frame start
959 */
960 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
961
e0bccd31
BH		 962 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
963 skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
964 &facilities)) {
1da177e4
LT		 965 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
966 return 0;
967 }
968
969 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
970
971 /*
972 * We can't accept the Call Request.
973 */
974 if (sk == NULL || sk_acceptq_is_full(sk) ||
975 (make = rose_make_new(sk)) == NULL) {
976 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
977 return 0;
978 }
979
980 skb->sk = make;
981 make->sk_state = TCP_ESTABLISHED;
982 make_rose = rose_sk(make);
983
984 make_rose->lci = lci;
985 make_rose->dest_addr = facilities.dest_addr;
986 make_rose->dest_call = facilities.dest_call;
987 make_rose->dest_ndigis = facilities.dest_ndigis;
988 for (n = 0 ; n < facilities.dest_ndigis ; n++)
989 make_rose->dest_digis[n] = facilities.dest_digis[n];
990 make_rose->source_addr = facilities.source_addr;
991 make_rose->source_call = facilities.source_call;
992 make_rose->source_ndigis = facilities.source_ndigis;
993 for (n = 0 ; n < facilities.source_ndigis ; n++)
db34de93 994 make_rose->source_digis[n] = facilities.source_digis[n];
1da177e4
LT		 995 make_rose->neighbour = neigh;
996 make_rose->device = dev;
997 make_rose->facilities = facilities;
998
999 make_rose->neighbour->use++;
1000
1001 if (rose_sk(sk)->defer) {
1002 make_rose->state = ROSE_STATE_5;
1003 } else {
1004 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1005 make_rose->state = ROSE_STATE_3;
1006 rose_start_idletimer(make);
1007 }
1008
1009 make_rose->condition = 0x00;
1010 make_rose->vs = 0;
1011 make_rose->va = 0;
1012 make_rose->vr = 0;
1013 make_rose->vl = 0;
7976a11b 1014 sk_acceptq_added(sk);
1da177e4
LT		 1015
1016 rose_insert_socket(make);
1017
1018 skb_queue_head(&sk->sk_receive_queue, skb);
1019
1020 rose_start_heartbeat(make);
1021
1022 if (!sock_flag(sk, SOCK_DEAD))
676d2369 1023 sk->sk_data_ready(sk);
1da177e4
LT		 1024
1025 return 1;
1026}
1027
1b784140 1028static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1da177e4
LT		 1029{
1030 struct sock *sk = sock->sk;
1031 struct rose_sock *rose = rose_sk(sk);
342dfc30 1032 DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1da177e4
LT		 1033 int err;
1034 struct full_sockaddr_rose srose;
1035 struct sk_buff *skb;
1036 unsigned char *asmptr;
1037 int n, size, qbit = 0;
1038
1039 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1040 return -EINVAL;
1041
1042 if (sock_flag(sk, SOCK_ZAPPED))
1043 return -EADDRNOTAVAIL;
1044
1045 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1046 send_sig(SIGPIPE, current, 0);
1047 return -EPIPE;
1048 }
1049
1050 if (rose->neighbour == NULL || rose->device == NULL)
1051 return -ENETUNREACH;
1052
1053 if (usrose != NULL) {
1054 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1055 return -EINVAL;
1056 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1057 memcpy(&srose, usrose, msg->msg_namelen);
1058 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1059 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1060 return -EISCONN;
1061 if (srose.srose_ndigis != rose->dest_ndigis)
1062 return -EISCONN;
1063 if (srose.srose_ndigis == rose->dest_ndigis) {
1064 for (n = 0 ; n < srose.srose_ndigis ; n++)
1065 if (ax25cmp(&rose->dest_digis[n],
1066 &srose.srose_digis[n]))
1067 return -EISCONN;
1068 }
1069 if (srose.srose_family != AF_ROSE)
1070 return -EINVAL;
1071 } else {
1072 if (sk->sk_state != TCP_ESTABLISHED)
1073 return -ENOTCONN;
1074
1075 srose.srose_family = AF_ROSE;
1076 srose.srose_addr = rose->dest_addr;
1077 srose.srose_call = rose->dest_call;
1078 srose.srose_ndigis = rose->dest_ndigis;
1079 for (n = 0 ; n < rose->dest_ndigis ; n++)
1080 srose.srose_digis[n] = rose->dest_digis[n];
1081 }
1082
1da177e4 1083 /* Build a packet */
83e0bbcb
AC		 1084 /* Sanity check the packet size */
1085 if (len > 65535)
1086 return -EMSGSIZE;
1087
1da177e4
LT		 1088 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1089
1090 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1091 return err;
1092
1093 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1094
1095 /*
1096 * Put the data on the end
1097 */
1da177e4 1098
eeeb0374
ACM		 1099 skb_reset_transport_header(skb);
1100 skb_put(skb, len);
1da177e4 1101
6ce8e9ce 1102 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1da177e4
LT		 1103 if (err) {
1104 kfree_skb(skb);
1105 return err;
1106 }
1107
1108 /*
1109 * If the Q BIT Include socket option is in force, the first
1110 * byte of the user data is the logical value of the Q Bit.
1111 */
1112 if (rose->qbitincl) {
1113 qbit = skb->data[0];
1114 skb_pull(skb, 1);
1115 }
1116
1117 /*
1118 * Push down the ROSE header
1119 */
1120 asmptr = skb_push(skb, ROSE_MIN_LEN);
1121
1da177e4
LT		 1122 /* Build a ROSE Network header */
1123 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1124 asmptr[1] = (rose->lci >> 0) & 0xFF;
1125 asmptr[2] = ROSE_DATA;
1126
1127 if (qbit)
1128 asmptr[0] |= ROSE_Q_BIT;
1129
1da177e4
LT		 1130 if (sk->sk_state != TCP_ESTABLISHED) {
1131 kfree_skb(skb);
1132 return -ENOTCONN;
1133 }
1134
1135#ifdef M_BIT
1136#define ROSE_PACLEN (256-ROSE_MIN_LEN)
1137 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1138 unsigned char header[ROSE_MIN_LEN];
1139 struct sk_buff *skbn;
1140 int frontlen;
1141 int lg;
1142
1143 /* Save a copy of the Header */
d626f62b 1144 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1da177e4
LT		 1145 skb_pull(skb, ROSE_MIN_LEN);
1146
1147 frontlen = skb_headroom(skb);
1148
1149 while (skb->len > 0) {
1150 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1151 kfree_skb(skb);
1152 return err;
1153 }
1154
1155 skbn->sk = sk;
1156 skbn->free = 1;
1157 skbn->arp = 1;
1158
1159 skb_reserve(skbn, frontlen);
1160
1161 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1162
1163 /* Copy the user data */
d626f62b 1164 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1da177e4
LT		 1165 skb_pull(skb, lg);
1166
1167 /* Duplicate the Header */
1168 skb_push(skbn, ROSE_MIN_LEN);
27d7ff46 1169 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1da177e4
LT		 1170
1171 if (skb->len > 0)
1172 skbn->data[2] |= M_BIT;
1173
1174 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1175 }
1176
1177 skb->free = 1;
1178 kfree_skb(skb);
1179 } else {
1180 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1181 }
1182#else
1183 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1184#endif
1185
1186 rose_kick(sk);
1187
1188 return len;
1189}
1190
1191
1b784140
YX		 1192static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1193 int flags)
1da177e4
LT		 1194{
1195 struct sock *sk = sock->sk;
1196 struct rose_sock *rose = rose_sk(sk);
1da177e4
LT		 1197 size_t copied;
1198 unsigned char *asmptr;
1199 struct sk_buff *skb;
1200 int n, er, qbit;
1201
1202 /*
1203 * This works for seqpacket too. The receiver has ordered the queue for
1204 * us! We do one quick check first though
1205 */
1206 if (sk->sk_state != TCP_ESTABLISHED)
1207 return -ENOTCONN;
1208
1209 /* Now we can treat all alike */
1210 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1211 return er;
1212
1213 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1214
1215 skb_pull(skb, ROSE_MIN_LEN);
1216
1217 if (rose->qbitincl) {
1218 asmptr = skb_push(skb, 1);
1219 *asmptr = qbit;
1220 }
1221
badff6d0 1222 skb_reset_transport_header(skb);
1da177e4
LT		 1223 copied = skb->len;
1224
1225 if (copied > size) {
1226 copied = size;
1227 msg->msg_flags |= MSG_TRUNC;
1228 }
1229
51f3d02b 1230 skb_copy_datagram_msg(skb, 0, msg, copied);
1da177e4 1231
f3d33426
HFS		 1232 if (msg->msg_name) {
1233 struct sockaddr_rose *srose;
342dfc30
SH		 1234 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1235 msg->msg_name);
f3d33426
HFS		 1236
1237 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1238 srose = msg->msg_name;
1da177e4
LT		 1239 srose->srose_family = AF_ROSE;
1240 srose->srose_addr = rose->dest_addr;
1241 srose->srose_call = rose->dest_call;
1242 srose->srose_ndigis = rose->dest_ndigis;
f81152e3
FW		 1243 for (n = 0 ; n < rose->dest_ndigis ; n++)
1244 full_srose->srose_digis[n] = rose->dest_digis[n];
1245 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1da177e4
LT		 1246 }
1247
1248 skb_free_datagram(sk, skb);
1249
1250 return copied;
1251}
1252
1253
1254static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1255{
1256 struct sock *sk = sock->sk;
1257 struct rose_sock *rose = rose_sk(sk);
1258 void __user *argp = (void __user *)arg;
1259
1260 switch (cmd) {
1261 case TIOCOUTQ: {
1262 long amount;
31e6d363
ED		 1263
1264 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1da177e4
LT		 1265 if (amount < 0)
1266 amount = 0;
20b7d10a 1267 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1268 }
1269
1270 case TIOCINQ: {
1271 struct sk_buff *skb;
1272 long amount = 0L;
1273 /* These two are safe on a single CPU system as only user tasks fiddle here */
1274 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1275 amount = skb->len;
20b7d10a 1276 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1277 }
1278
1da177e4
LT		 1279 case SIOCGIFADDR:
1280 case SIOCSIFADDR:
1281 case SIOCGIFDSTADDR:
1282 case SIOCSIFDSTADDR:
1283 case SIOCGIFBRDADDR:
1284 case SIOCSIFBRDADDR:
1285 case SIOCGIFNETMASK:
1286 case SIOCSIFNETMASK:
1287 case SIOCGIFMETRIC:
1288 case SIOCSIFMETRIC:
1289 return -EINVAL;
1290
1291 case SIOCADDRT:
1292 case SIOCDELRT:
1293 case SIOCRSCLRRT:
1294 if (!capable(CAP_NET_ADMIN))
1295 return -EPERM;
1296 return rose_rt_ioctl(cmd, argp);
1297
1298 case SIOCRSGCAUSE: {
1299 struct rose_cause_struct rose_cause;
1300 rose_cause.cause = rose->cause;
1301 rose_cause.diagnostic = rose->diagnostic;
1302 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1303 }
1304
1305 case SIOCRSSCAUSE: {
1306 struct rose_cause_struct rose_cause;
1307 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1308 return -EFAULT;
1309 rose->cause = rose_cause.cause;
1310 rose->diagnostic = rose_cause.diagnostic;
1311 return 0;
1312 }
1313
1314 case SIOCRSSL2CALL:
1315 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1316 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1317 ax25_listen_release(&rose_callsign, NULL);
1318 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1319 return -EFAULT;
1320 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
81dcd169
RB		 1321 return ax25_listen_register(&rose_callsign, NULL);
1322
1da177e4
LT		 1323 return 0;
1324
1325 case SIOCRSGL2CALL:
1326 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1327
1328 case SIOCRSACCEPT:
1329 if (rose->state == ROSE_STATE_5) {
1330 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1331 rose_start_idletimer(sk);
1332 rose->condition = 0x00;
1333 rose->vs = 0;
1334 rose->va = 0;
1335 rose->vr = 0;
1336 rose->vl = 0;
1337 rose->state = ROSE_STATE_3;
1338 }
1339 return 0;
1340
1341 default:
b5e5fa5e 1342 return -ENOIOCTLCMD;
1da177e4
LT		 1343 }
1344
1345 return 0;
1346}
1347
1348#ifdef CONFIG_PROC_FS
1349static void *rose_info_start(struct seq_file *seq, loff_t *pos)
95b7d924 1350 __acquires(rose_list_lock)
1da177e4 1351{
1da177e4 1352 spin_lock_bh(&rose_list_lock);
b999748a 1353 return seq_hlist_start_head(&rose_list, *pos);
1da177e4
LT		 1354}
1355
1356static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1357{
b999748a 1358 return seq_hlist_next(v, &rose_list, pos);
1da177e4 1359}
3dcf7c5e 1360
1da177e4 1361static void rose_info_stop(struct seq_file *seq, void *v)
95b7d924 1362 __releases(rose_list_lock)
1da177e4
LT		 1363{
1364 spin_unlock_bh(&rose_list_lock);
1365}
1366
1367static int rose_info_show(struct seq_file *seq, void *v)
1368{
dcf777f6 1369 char buf[11], rsbuf[11];
f75268cd 1370
1da177e4 1371 if (v == SEQ_START_TOKEN)
3dcf7c5e 1372 seq_puts(seq,
1da177e4
LT		 1373 "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");
1374
1375 else {
b999748a 1376 struct sock *s = sk_entry(v);
1da177e4
LT		 1377 struct rose_sock *rose = rose_sk(s);
1378 const char *devname, *callsign;
1379 const struct net_device *dev = rose->device;
1380
1381 if (!dev)
1382 devname = "???";
1383 else
1384 devname = dev->name;
3dcf7c5e 1385
1da177e4 1386 seq_printf(seq, "%-10s %-9s ",
dcf777f6
RB		 1387 rose2asc(rsbuf, &rose->dest_addr),
1388 ax2asc(buf, &rose->dest_call));
1da177e4
LT		 1389
1390 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1391 callsign = "??????-?";
1392 else
f75268cd 1393 callsign = ax2asc(buf, &rose->source_call);
1da177e4
LT		 1394
1395 seq_printf(seq,
1396 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
dcf777f6 1397 rose2asc(rsbuf, &rose->source_addr),
1da177e4
LT		 1398 callsign,
1399 devname,
1400 rose->lci & 0x0FFF,
1401 (rose->neighbour) ? rose->neighbour->number : 0,
1402 rose->state,
1403 rose->vs,
1404 rose->vr,
1405 rose->va,
1406 ax25_display_timer(&rose->timer) / HZ,
1407 rose->t1 / HZ,
1408 rose->t2 / HZ,
1409 rose->t3 / HZ,
1410 rose->hb / HZ,
1411 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1412 rose->idle / (60 * HZ),
31e6d363
ED		 1413 sk_wmem_alloc_get(s),
1414 sk_rmem_alloc_get(s),
1da177e4
LT		 1415 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1416 }
1417
1418 return 0;
1419}
1420
56b3d975 1421static const struct seq_operations rose_info_seqops = {
1da177e4
LT		 1422 .start = rose_info_start,
1423 .next = rose_info_next,
1424 .stop = rose_info_stop,
1425 .show = rose_info_show,
1426};
1da177e4
LT		 1427#endif /* CONFIG_PROC_FS */
1428
ec1b4cf7 1429static const struct net_proto_family rose_family_ops = {
1da177e4
LT		 1430 .family = PF_ROSE,
1431 .create = rose_create,
1432 .owner = THIS_MODULE,
1433};
1434
5708e868 1435static const struct proto_ops rose_proto_ops = {
1da177e4
LT		 1436 .family = PF_ROSE,
1437 .owner = THIS_MODULE,
1438 .release = rose_release,
1439 .bind = rose_bind,
1440 .connect = rose_connect,
1441 .socketpair = sock_no_socketpair,
1442 .accept = rose_accept,
1443 .getname = rose_getname,
a11e1d43 1444 .poll = datagram_poll,
1da177e4 1445 .ioctl = rose_ioctl,
c7cbdbf2 1446 .gettstamp = sock_gettstamp,
1da177e4
LT		 1447 .listen = rose_listen,
1448 .shutdown = sock_no_shutdown,
1449 .setsockopt = rose_setsockopt,
1450 .getsockopt = rose_getsockopt,
1451 .sendmsg = rose_sendmsg,
1452 .recvmsg = rose_recvmsg,
1453 .mmap = sock_no_mmap,
1454 .sendpage = sock_no_sendpage,
1455};
1456
1457static struct notifier_block rose_dev_notifier = {
1458 .notifier_call = rose_device_event,
1459};
1460
1461static struct net_device **dev_rose;
1462
8d5cf596
RB		 1463static struct ax25_protocol rose_pid = {
1464 .pid = AX25_P_ROSE,
1465 .func = rose_route_frame
1466};
1467
a4282717
RB		 1468static struct ax25_linkfail rose_linkfail_notifier = {
1469 .func = rose_link_failed
1470};
1471
1da177e4
LT		 1472static int __init rose_proto_init(void)
1473{
1474 int i;
a83cd2cc 1475 int rc;
1da177e4 1476
a83cd2cc 1477 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
4d299f18 1478 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter too large\n");
a83cd2cc
AD		 1479 rc = -EINVAL;
1480 goto out;
1481 }
1482
1483 rc = proto_register(&rose_proto, 0);
1da177e4
LT		 1484 if (rc != 0)
1485 goto out;
1486
1487 rose_callsign = null_ax25_address;
1488
6396bb22
KC		 1489 dev_rose = kcalloc(rose_ndevs, sizeof(struct net_device *),
1490 GFP_KERNEL);
1da177e4
LT		 1491 if (dev_rose == NULL) {
1492 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
a83cd2cc
AD		 1493 rc = -ENOMEM;
1494 goto out_proto_unregister;
1da177e4
LT		 1495 }
1496
1da177e4
LT		 1497 for (i = 0; i < rose_ndevs; i++) {
1498 struct net_device *dev;
1499 char name[IFNAMSIZ];
1500
1501 sprintf(name, "rose%d", i);
c835a677 1502 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1da177e4
LT		 1503 if (!dev) {
1504 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
70ff3b66 1505 rc = -ENOMEM;
1da177e4
LT		 1506 goto fail;
1507 }
70ff3b66
AD		 1508 rc = register_netdev(dev);
1509 if (rc) {
520d1b83 1510 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1da177e4
LT		 1511 free_netdev(dev);
1512 goto fail;
1513 }
1514 dev_rose[i] = dev;
1515 }
1516
1517 sock_register(&rose_family_ops);
1518 register_netdevice_notifier(&rose_dev_notifier);
1da177e4 1519
8d5cf596 1520 ax25_register_pid(&rose_pid);
a4282717 1521 ax25_linkfail_register(&rose_linkfail_notifier);
1da177e4
LT		 1522
1523#ifdef CONFIG_SYSCTL
1524 rose_register_sysctl();
1525#endif
1526 rose_loopback_init();
1527
1528 rose_add_loopback_neigh();
1529
fddda2b7
CH		 1530 proc_create_seq("rose", 0444, init_net.proc_net, &rose_info_seqops);
1531 proc_create_seq("rose_neigh", 0444, init_net.proc_net,
1532 &rose_neigh_seqops);
1533 proc_create_seq("rose_nodes", 0444, init_net.proc_net,
1534 &rose_node_seqops);
1535 proc_create_seq("rose_routes", 0444, init_net.proc_net,
1536 &rose_route_seqops);
1da177e4
LT		 1537out:
1538 return rc;
1539fail:
1540 while (--i >= 0) {
1541 unregister_netdev(dev_rose[i]);
1542 free_netdev(dev_rose[i]);
1543 }
1544 kfree(dev_rose);
a83cd2cc 1545out_proto_unregister:
1da177e4 1546 proto_unregister(&rose_proto);
70ff3b66 1547 goto out;
1da177e4
LT		 1548}
1549module_init(rose_proto_init);
1550
1551module_param(rose_ndevs, int, 0);
1552MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1553
1554MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1555MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1556MODULE_LICENSE("GPL");
1557MODULE_ALIAS_NETPROTO(PF_ROSE);
1558
1559static void __exit rose_exit(void)
1560{
1561 int i;
1562
ece31ffd
G		 1563 remove_proc_entry("rose", init_net.proc_net);
1564 remove_proc_entry("rose_neigh", init_net.proc_net);
1565 remove_proc_entry("rose_nodes", init_net.proc_net);
1566 remove_proc_entry("rose_routes", init_net.proc_net);
1da177e4
LT		 1567 rose_loopback_clear();
1568
1569 rose_rt_free();
1570
1571 ax25_protocol_release(AX25_P_ROSE);
a4282717 1572 ax25_linkfail_release(&rose_linkfail_notifier);
1da177e4
LT		 1573
1574 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1575 ax25_listen_release(&rose_callsign, NULL);
1576
1577#ifdef CONFIG_SYSCTL
1578 rose_unregister_sysctl();
1579#endif
1580 unregister_netdevice_notifier(&rose_dev_notifier);
1581
1582 sock_unregister(PF_ROSE);
1583
1584 for (i = 0; i < rose_ndevs; i++) {
1585 struct net_device *dev = dev_rose[i];
1586
1587 if (dev) {
1588 unregister_netdev(dev);
1589 free_netdev(dev);
1590 }
1591 }
1592
1593 kfree(dev_rose);
1594 proto_unregister(&rose_proto);
1595}
1596
1597module_exit(rose_exit);
Linux 6.x block layer and io_uring tree(s)