]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - net/rose/af_rose.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[NET] NETNS: Omit sock->sk_net without CONFIG_NET_NS.
[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>
21#include <linux/kernel.h>
22#include <linux/sched.h>
23#include <linux/spinlock.h>
24#include <linux/timer.h>
25#include <linux/string.h>
26#include <linux/sockios.h>
27#include <linux/net.h>
28#include <linux/stat.h>
457c4cbc 29#include <net/net_namespace.h>
1da177e4
LT		 30#include <net/ax25.h>
31#include <linux/inet.h>
32#include <linux/netdevice.h>
33#include <linux/if_arp.h>
34#include <linux/skbuff.h>
35#include <net/sock.h>
36#include <asm/system.h>
37#include <asm/uaccess.h>
38#include <linux/fcntl.h>
39#include <linux/termios.h>
40#include <linux/mm.h>
41#include <linux/interrupt.h>
42#include <linux/notifier.h>
43#include <net/rose.h>
44#include <linux/proc_fs.h>
45#include <linux/seq_file.h>
c752f073 46#include <net/tcp_states.h>
1da177e4
LT		 47#include <net/ip.h>
48#include <net/arp.h>
49
50static int rose_ndevs = 10;
51
52int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
53int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
54int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
55int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
56int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
57int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
58int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
59int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
60int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
61int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
62
63static HLIST_HEAD(rose_list);
64static DEFINE_SPINLOCK(rose_list_lock);
65
66static struct proto_ops rose_proto_ops;
67
68ax25_address rose_callsign;
69
b1d21ca8
RB		 70/*
71 * ROSE network devices are virtual network devices encapsulating ROSE
72 * frames into AX.25 which will be sent through an AX.25 device, so form a
73 * special "super class" of normal net devices; split their locks off into a
74 * separate class since they always nest.
75 */
76static struct lock_class_key rose_netdev_xmit_lock_key;
77
1da177e4
LT		 78/*
79 * Convert a ROSE address into text.
80 */
81const char *rose2asc(const rose_address *addr)
82{
83 static char buffer[11];
84
85 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
86 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
87 addr->rose_addr[4] == 0x00) {
88 strcpy(buffer, "*");
89 } else {
90 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
91 addr->rose_addr[1] & 0xFF,
92 addr->rose_addr[2] & 0xFF,
93 addr->rose_addr[3] & 0xFF,
94 addr->rose_addr[4] & 0xFF);
95 }
96
97 return buffer;
98}
99
100/*
101 * Compare two ROSE addresses, 0 == equal.
102 */
103int rosecmp(rose_address *addr1, rose_address *addr2)
104{
105 int i;
106
107 for (i = 0; i < 5; i++)
108 if (addr1->rose_addr[i] != addr2->rose_addr[i])
109 return 1;
110
111 return 0;
112}
113
114/*
115 * Compare two ROSE addresses for only mask digits, 0 == equal.
116 */
117int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
118{
95b7d924 119 unsigned int i, j;
1da177e4
LT		 120
121 if (mask > 10)
122 return 1;
123
124 for (i = 0; i < mask; i++) {
125 j = i / 2;
126
127 if ((i % 2) != 0) {
128 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
129 return 1;
130 } else {
131 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
132 return 1;
133 }
134 }
135
136 return 0;
137}
138
139/*
140 * Socket removal during an interrupt is now safe.
141 */
142static void rose_remove_socket(struct sock *sk)
143{
144 spin_lock_bh(&rose_list_lock);
145 sk_del_node_init(sk);
146 spin_unlock_bh(&rose_list_lock);
147}
148
149/*
150 * Kill all bound sockets on a broken link layer connection to a
151 * particular neighbour.
152 */
153void rose_kill_by_neigh(struct rose_neigh *neigh)
154{
155 struct sock *s;
156 struct hlist_node *node;
157
158 spin_lock_bh(&rose_list_lock);
159 sk_for_each(s, node, &rose_list) {
160 struct rose_sock *rose = rose_sk(s);
161
162 if (rose->neighbour == neigh) {
163 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
164 rose->neighbour->use--;
165 rose->neighbour = NULL;
166 }
167 }
168 spin_unlock_bh(&rose_list_lock);
169}
170
171/*
172 * Kill all bound sockets on a dropped device.
173 */
174static void rose_kill_by_device(struct net_device *dev)
175{
176 struct sock *s;
177 struct hlist_node *node;
178
179 spin_lock_bh(&rose_list_lock);
180 sk_for_each(s, node, &rose_list) {
181 struct rose_sock *rose = rose_sk(s);
182
183 if (rose->device == dev) {
184 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
185 rose->neighbour->use--;
186 rose->device = NULL;
187 }
188 }
189 spin_unlock_bh(&rose_list_lock);
190}
191
192/*
193 * Handle device status changes.
194 */
195static int rose_device_event(struct notifier_block *this, unsigned long event,
196 void *ptr)
197{
198 struct net_device *dev = (struct net_device *)ptr;
199
c346dca1 200 if (dev_net(dev) != &init_net)
e9dc8653
EB		 201 return NOTIFY_DONE;
202
1da177e4
LT		 203 if (event != NETDEV_DOWN)
204 return NOTIFY_DONE;
205
206 switch (dev->type) {
207 case ARPHRD_ROSE:
208 rose_kill_by_device(dev);
209 break;
210 case ARPHRD_AX25:
211 rose_link_device_down(dev);
212 rose_rt_device_down(dev);
213 break;
214 }
215
216 return NOTIFY_DONE;
217}
218
219/*
220 * Add a socket to the bound sockets list.
221 */
222static void rose_insert_socket(struct sock *sk)
223{
224
225 spin_lock_bh(&rose_list_lock);
226 sk_add_node(sk, &rose_list);
227 spin_unlock_bh(&rose_list_lock);
228}
229
230/*
231 * Find a socket that wants to accept the Call Request we just
232 * received.
233 */
234static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
235{
236 struct sock *s;
237 struct hlist_node *node;
238
239 spin_lock_bh(&rose_list_lock);
240 sk_for_each(s, node, &rose_list) {
241 struct rose_sock *rose = rose_sk(s);
242
243 if (!rosecmp(&rose->source_addr, addr) &&
244 !ax25cmp(&rose->source_call, call) &&
245 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
246 goto found;
247 }
248
249 sk_for_each(s, node, &rose_list) {
250 struct rose_sock *rose = rose_sk(s);
251
252 if (!rosecmp(&rose->source_addr, addr) &&
253 !ax25cmp(&rose->source_call, &null_ax25_address) &&
254 s->sk_state == TCP_LISTEN)
255 goto found;
256 }
257 s = NULL;
258found:
259 spin_unlock_bh(&rose_list_lock);
260 return s;
261}
262
263/*
264 * Find a connected ROSE socket given my LCI and device.
265 */
266struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
267{
268 struct sock *s;
269 struct hlist_node *node;
270
271 spin_lock_bh(&rose_list_lock);
272 sk_for_each(s, node, &rose_list) {
273 struct rose_sock *rose = rose_sk(s);
274
275 if (rose->lci == lci && rose->neighbour == neigh)
276 goto found;
277 }
278 s = NULL;
279found:
280 spin_unlock_bh(&rose_list_lock);
281 return s;
282}
283
284/*
285 * Find a unique LCI for a given device.
286 */
287unsigned int rose_new_lci(struct rose_neigh *neigh)
288{
289 int lci;
290
291 if (neigh->dce_mode) {
292 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
293 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
294 return lci;
295 } else {
296 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
297 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
298 return lci;
299 }
300
301 return 0;
302}
303
304/*
305 * Deferred destroy.
306 */
307void rose_destroy_socket(struct sock *);
308
309/*
310 * Handler for deferred kills.
311 */
312static void rose_destroy_timer(unsigned long data)
313{
314 rose_destroy_socket((struct sock *)data);
315}
316
317/*
318 * This is called from user mode and the timers. Thus it protects itself
319 * against interrupt users but doesn't worry about being called during
320 * work. Once it is removed from the queue no interrupt or bottom half
321 * will touch it and we are (fairly 8-) ) safe.
322 */
323void rose_destroy_socket(struct sock *sk)
324{
325 struct sk_buff *skb;
326
327 rose_remove_socket(sk);
328 rose_stop_heartbeat(sk);
329 rose_stop_idletimer(sk);
330 rose_stop_timer(sk);
331
332 rose_clear_queues(sk); /* Flush the queues */
333
334 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
335 if (skb->sk != sk) { /* A pending connection */
336 /* Queue the unaccepted socket for death */
337 sock_set_flag(skb->sk, SOCK_DEAD);
338 rose_start_heartbeat(skb->sk);
339 rose_sk(skb->sk)->state = ROSE_STATE_0;
340 }
341
342 kfree_skb(skb);
343 }
344
345 if (atomic_read(&sk->sk_wmem_alloc) ||
346 atomic_read(&sk->sk_rmem_alloc)) {
347 /* Defer: outstanding buffers */
b24b8a24
PE		 348 setup_timer(&sk->sk_timer, rose_destroy_timer,
349 (unsigned long)sk);
1da177e4 350 sk->sk_timer.expires = jiffies + 10 * HZ;
1da177e4
LT		 351 add_timer(&sk->sk_timer);
352 } else
353 sock_put(sk);
354}
355
356/*
357 * Handling for system calls applied via the various interfaces to a
358 * ROSE socket object.
359 */
360
361static int rose_setsockopt(struct socket *sock, int level, int optname,
362 char __user *optval, int optlen)
363{
364 struct sock *sk = sock->sk;
365 struct rose_sock *rose = rose_sk(sk);
366 int opt;
367
368 if (level != SOL_ROSE)
369 return -ENOPROTOOPT;
370
371 if (optlen < sizeof(int))
372 return -EINVAL;
373
374 if (get_user(opt, (int __user *)optval))
375 return -EFAULT;
376
377 switch (optname) {
378 case ROSE_DEFER:
379 rose->defer = opt ? 1 : 0;
380 return 0;
381
382 case ROSE_T1:
383 if (opt < 1)
384 return -EINVAL;
385 rose->t1 = opt * HZ;
386 return 0;
387
388 case ROSE_T2:
389 if (opt < 1)
390 return -EINVAL;
391 rose->t2 = opt * HZ;
392 return 0;
393
394 case ROSE_T3:
395 if (opt < 1)
396 return -EINVAL;
397 rose->t3 = opt * HZ;
398 return 0;
399
400 case ROSE_HOLDBACK:
401 if (opt < 1)
402 return -EINVAL;
403 rose->hb = opt * HZ;
404 return 0;
405
406 case ROSE_IDLE:
407 if (opt < 0)
408 return -EINVAL;
409 rose->idle = opt * 60 * HZ;
410 return 0;
411
412 case ROSE_QBITINCL:
413 rose->qbitincl = opt ? 1 : 0;
414 return 0;
415
416 default:
417 return -ENOPROTOOPT;
418 }
419}
420
421static int rose_getsockopt(struct socket *sock, int level, int optname,
422 char __user *optval, int __user *optlen)
423{
424 struct sock *sk = sock->sk;
425 struct rose_sock *rose = rose_sk(sk);
426 int val = 0;
427 int len;
428
429 if (level != SOL_ROSE)
430 return -ENOPROTOOPT;
431
432 if (get_user(len, optlen))
433 return -EFAULT;
434
435 if (len < 0)
436 return -EINVAL;
437
438 switch (optname) {
439 case ROSE_DEFER:
440 val = rose->defer;
441 break;
442
443 case ROSE_T1:
444 val = rose->t1 / HZ;
445 break;
446
447 case ROSE_T2:
448 val = rose->t2 / HZ;
449 break;
450
451 case ROSE_T3:
452 val = rose->t3 / HZ;
453 break;
454
455 case ROSE_HOLDBACK:
456 val = rose->hb / HZ;
457 break;
458
459 case ROSE_IDLE:
460 val = rose->idle / (60 * HZ);
461 break;
462
463 case ROSE_QBITINCL:
464 val = rose->qbitincl;
465 break;
466
467 default:
468 return -ENOPROTOOPT;
469 }
470
471 len = min_t(unsigned int, len, sizeof(int));
472
473 if (put_user(len, optlen))
474 return -EFAULT;
475
476 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
477}
478
479static int rose_listen(struct socket *sock, int backlog)
480{
481 struct sock *sk = sock->sk;
482
483 if (sk->sk_state != TCP_LISTEN) {
484 struct rose_sock *rose = rose_sk(sk);
485
486 rose->dest_ndigis = 0;
487 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
488 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
489 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
490 sk->sk_max_ack_backlog = backlog;
491 sk->sk_state = TCP_LISTEN;
492 return 0;
493 }
494
495 return -EOPNOTSUPP;
496}
497
498static struct proto rose_proto = {
499 .name = "ROSE",
500 .owner = THIS_MODULE,
501 .obj_size = sizeof(struct rose_sock),
502};
503
1b8d7ae4 504static int rose_create(struct net *net, struct socket *sock, int protocol)
1da177e4
LT		 505{
506 struct sock *sk;
507 struct rose_sock *rose;
508
1b8d7ae4
EB		 509 if (net != &init_net)
510 return -EAFNOSUPPORT;
511
1da177e4
LT		 512 if (sock->type != SOCK_SEQPACKET || protocol != 0)
513 return -ESOCKTNOSUPPORT;
514
6257ff21
PE		 515 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
516 if (sk == NULL)
1da177e4
LT		 517 return -ENOMEM;
518
519 rose = rose_sk(sk);
520
521 sock_init_data(sock, sk);
522
523 skb_queue_head_init(&rose->ack_queue);
524#ifdef M_BIT
525 skb_queue_head_init(&rose->frag_queue);
526 rose->fraglen = 0;
527#endif
528
529 sock->ops = &rose_proto_ops;
530 sk->sk_protocol = protocol;
531
532 init_timer(&rose->timer);
533 init_timer(&rose->idletimer);
534
82e84249
RB		 535 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
536 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
537 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
538 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
539 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
1da177e4
LT		 540
541 rose->state = ROSE_STATE_0;
542
543 return 0;
544}
545
546static struct sock *rose_make_new(struct sock *osk)
547{
548 struct sock *sk;
549 struct rose_sock *rose, *orose;
550
551 if (osk->sk_type != SOCK_SEQPACKET)
552 return NULL;
553
3b1e0a65 554 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto);
6257ff21 555 if (sk == NULL)
1da177e4
LT		 556 return NULL;
557
558 rose = rose_sk(sk);
559
560 sock_init_data(NULL, sk);
561
562 skb_queue_head_init(&rose->ack_queue);
563#ifdef M_BIT
564 skb_queue_head_init(&rose->frag_queue);
565 rose->fraglen = 0;
566#endif
567
568 sk->sk_type = osk->sk_type;
569 sk->sk_socket = osk->sk_socket;
570 sk->sk_priority = osk->sk_priority;
571 sk->sk_protocol = osk->sk_protocol;
572 sk->sk_rcvbuf = osk->sk_rcvbuf;
573 sk->sk_sndbuf = osk->sk_sndbuf;
574 sk->sk_state = TCP_ESTABLISHED;
575 sk->sk_sleep = osk->sk_sleep;
53b924b3 576 sock_copy_flags(sk, osk);
1da177e4
LT		 577
578 init_timer(&rose->timer);
579 init_timer(&rose->idletimer);
580
581 orose = rose_sk(osk);
582 rose->t1 = orose->t1;
583 rose->t2 = orose->t2;
584 rose->t3 = orose->t3;
585 rose->hb = orose->hb;
586 rose->idle = orose->idle;
587 rose->defer = orose->defer;
588 rose->device = orose->device;
589 rose->qbitincl = orose->qbitincl;
590
591 return sk;
592}
593
594static int rose_release(struct socket *sock)
595{
596 struct sock *sk = sock->sk;
597 struct rose_sock *rose;
598
599 if (sk == NULL) return 0;
600
601 rose = rose_sk(sk);
602
603 switch (rose->state) {
604 case ROSE_STATE_0:
605 rose_disconnect(sk, 0, -1, -1);
606 rose_destroy_socket(sk);
607 break;
608
609 case ROSE_STATE_2:
610 rose->neighbour->use--;
611 rose_disconnect(sk, 0, -1, -1);
612 rose_destroy_socket(sk);
613 break;
614
615 case ROSE_STATE_1:
616 case ROSE_STATE_3:
617 case ROSE_STATE_4:
618 case ROSE_STATE_5:
619 rose_clear_queues(sk);
620 rose_stop_idletimer(sk);
621 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
622 rose_start_t3timer(sk);
623 rose->state = ROSE_STATE_2;
624 sk->sk_state = TCP_CLOSE;
625 sk->sk_shutdown |= SEND_SHUTDOWN;
626 sk->sk_state_change(sk);
627 sock_set_flag(sk, SOCK_DEAD);
628 sock_set_flag(sk, SOCK_DESTROY);
629 break;
630
631 default:
632 break;
633 }
634
635 sock->sk = NULL;
636
637 return 0;
638}
639
640static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
641{
642 struct sock *sk = sock->sk;
643 struct rose_sock *rose = rose_sk(sk);
644 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
645 struct net_device *dev;
01d7dd0e
RB		 646 ax25_address *source;
647 ax25_uid_assoc *user;
1da177e4
LT		 648 int n;
649
650 if (!sock_flag(sk, SOCK_ZAPPED))
651 return -EINVAL;
652
653 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
654 return -EINVAL;
655
656 if (addr->srose_family != AF_ROSE)
657 return -EINVAL;
658
659 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
660 return -EINVAL;
661
662 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
663 return -EINVAL;
664
665 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
666 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
667 return -EADDRNOTAVAIL;
668 }
669
670 source = &addr->srose_call;
671
01d7dd0e
RB		 672 user = ax25_findbyuid(current->euid);
673 if (user) {
674 rose->source_call = user->call;
675 ax25_uid_put(user);
676 } else {
1da177e4
LT		 677 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
678 return -EACCES;
01d7dd0e 679 rose->source_call = *source;
1da177e4
LT		 680 }
681
682 rose->source_addr = addr->srose_addr;
1da177e4
LT		 683 rose->device = dev;
684 rose->source_ndigis = addr->srose_ndigis;
685
686 if (addr_len == sizeof(struct full_sockaddr_rose)) {
687 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
688 for (n = 0 ; n < addr->srose_ndigis ; n++)
689 rose->source_digis[n] = full_addr->srose_digis[n];
690 } else {
691 if (rose->source_ndigis == 1) {
692 rose->source_digis[0] = addr->srose_digi;
693 }
694 }
695
696 rose_insert_socket(sk);
697
698 sock_reset_flag(sk, SOCK_ZAPPED);
699 SOCK_DEBUG(sk, "ROSE: socket is bound\n");
700 return 0;
701}
702
703static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
704{
705 struct sock *sk = sock->sk;
706 struct rose_sock *rose = rose_sk(sk);
707 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
708 unsigned char cause, diagnostic;
1da177e4 709 struct net_device *dev;
01d7dd0e 710 ax25_uid_assoc *user;
2536b94a 711 int n, err = 0;
1da177e4
LT		 712
713 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
714 return -EINVAL;
715
716 if (addr->srose_family != AF_ROSE)
717 return -EINVAL;
718
719 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
720 return -EINVAL;
721
722 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
723 return -EINVAL;
724
725 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
726 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
727 return -EINVAL;
728
2536b94a
RB		 729 lock_sock(sk);
730
731 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
732 /* Connect completed during a ERESTARTSYS event */
733 sock->state = SS_CONNECTED;
734 goto out_release;
735 }
736
737 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
738 sock->state = SS_UNCONNECTED;
739 err = -ECONNREFUSED;
740 goto out_release;
741 }
742
743 if (sk->sk_state == TCP_ESTABLISHED) {
744 /* No reconnect on a seqpacket socket */
745 err = -EISCONN;
746 goto out_release;
747 }
748
749 sk->sk_state = TCP_CLOSE;
750 sock->state = SS_UNCONNECTED;
751
1da177e4
LT		 752 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
753 &diagnostic);
754 if (!rose->neighbour)
755 return -ENETUNREACH;
756
757 rose->lci = rose_new_lci(rose->neighbour);
2536b94a
RB		 758 if (!rose->lci) {
759 err = -ENETUNREACH;
760 goto out_release;
761 }
1da177e4
LT		 762
763 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
764 sock_reset_flag(sk, SOCK_ZAPPED);
765
2536b94a
RB		 766 if ((dev = rose_dev_first()) == NULL) {
767 err = -ENETUNREACH;
768 goto out_release;
769 }
1da177e4 770
01d7dd0e 771 user = ax25_findbyuid(current->euid);
2536b94a
RB		 772 if (!user) {
773 err = -EINVAL;
774 goto out_release;
775 }
1da177e4
LT		 776
777 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
01d7dd0e 778 rose->source_call = user->call;
1da177e4 779 rose->device = dev;
01d7dd0e 780 ax25_uid_put(user);
1da177e4
LT		 781
782 rose_insert_socket(sk); /* Finish the bind */
783 }
d85838c5 784rose_try_next_neigh:
1da177e4
LT		 785 rose->dest_addr = addr->srose_addr;
786 rose->dest_call = addr->srose_call;
787 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
788 rose->dest_ndigis = addr->srose_ndigis;
789
790 if (addr_len == sizeof(struct full_sockaddr_rose)) {
791 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
792 for (n = 0 ; n < addr->srose_ndigis ; n++)
793 rose->dest_digis[n] = full_addr->srose_digis[n];
794 } else {
795 if (rose->dest_ndigis == 1) {
796 rose->dest_digis[0] = addr->srose_digi;
797 }
798 }
799
800 /* Move to connecting socket, start sending Connect Requests */
801 sock->state = SS_CONNECTING;
802 sk->sk_state = TCP_SYN_SENT;
803
804 rose->state = ROSE_STATE_1;
805
806 rose->neighbour->use++;
807
808 rose_write_internal(sk, ROSE_CALL_REQUEST);
809 rose_start_heartbeat(sk);
810 rose_start_t1timer(sk);
811
812 /* Now the loop */
2536b94a
RB		 813 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
814 err = -EINPROGRESS;
815 goto out_release;
816 }
1da177e4
LT		 817
818 /*
819 * A Connect Ack with Choke or timeout or failed routing will go to
820 * closed.
821 */
822 if (sk->sk_state == TCP_SYN_SENT) {
75606dc6 823 DEFINE_WAIT(wait);
1da177e4 824
1da177e4 825 for (;;) {
75606dc6 826 prepare_to_wait(sk->sk_sleep, &wait,
6140efb5 827 TASK_INTERRUPTIBLE);
1da177e4
LT		 828 if (sk->sk_state != TCP_SYN_SENT)
829 break;
75606dc6
RB		 830 if (!signal_pending(current)) {
831 release_sock(sk);
1da177e4 832 schedule();
2536b94a 833 lock_sock(sk);
1da177e4
LT		 834 continue;
835 }
75606dc6
RB		 836 err = -ERESTARTSYS;
837 break;
1da177e4 838 }
75606dc6
RB		 839 finish_wait(sk->sk_sleep, &wait);
840
841 if (err)
842 goto out_release;
1da177e4
LT		 843 }
844
845 if (sk->sk_state != TCP_ESTABLISHED) {
d85838c5
RB		 846 /* Try next neighbour */
847 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic);
848 if (rose->neighbour)
849 goto rose_try_next_neigh;
2536b94a
RB		 850
851 /* No more neighbours */
1da177e4 852 sock->state = SS_UNCONNECTED;
2536b94a
RB		 853 err = sock_error(sk); /* Always set at this point */
854 goto out_release;
1da177e4
LT		 855 }
856
857 sock->state = SS_CONNECTED;
858
2536b94a
RB		 859out_release:
860 release_sock(sk);
861
862 return err;
1da177e4
LT		 863}
864
865static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
866{
1da177e4
LT		 867 struct sk_buff *skb;
868 struct sock *newsk;
75606dc6 869 DEFINE_WAIT(wait);
1da177e4
LT		 870 struct sock *sk;
871 int err = 0;
872
873 if ((sk = sock->sk) == NULL)
874 return -EINVAL;
875
876 lock_sock(sk);
877 if (sk->sk_type != SOCK_SEQPACKET) {
878 err = -EOPNOTSUPP;
75606dc6 879 goto out_release;
1da177e4
LT		 880 }
881
882 if (sk->sk_state != TCP_LISTEN) {
883 err = -EINVAL;
75606dc6 884 goto out_release;
1da177e4
LT		 885 }
886
887 /*
888 * The write queue this time is holding sockets ready to use
889 * hooked into the SABM we saved
890 */
1da177e4 891 for (;;) {
75606dc6
RB		 892 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
893
1da177e4
LT		 894 skb = skb_dequeue(&sk->sk_receive_queue);
895 if (skb)
896 break;
897
1da177e4 898 if (flags & O_NONBLOCK) {
75606dc6
RB		 899 err = -EWOULDBLOCK;
900 break;
1da177e4 901 }
75606dc6
RB		 902 if (!signal_pending(current)) {
903 release_sock(sk);
1da177e4
LT		 904 schedule();
905 lock_sock(sk);
906 continue;
907 }
75606dc6
RB		 908 err = -ERESTARTSYS;
909 break;
1da177e4 910 }
75606dc6
RB		 911 finish_wait(sk->sk_sleep, &wait);
912 if (err)
913 goto out_release;
1da177e4
LT		 914
915 newsk = skb->sk;
916 newsk->sk_socket = newsock;
917 newsk->sk_sleep = &newsock->wait;
918
919 /* Now attach up the new socket */
920 skb->sk = NULL;
921 kfree_skb(skb);
922 sk->sk_ack_backlog--;
923 newsock->sk = newsk;
924
75606dc6 925out_release:
1da177e4
LT		 926 release_sock(sk);
927
928 return err;
929}
930
931static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
932 int *uaddr_len, int peer)
933{
934 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
935 struct sock *sk = sock->sk;
936 struct rose_sock *rose = rose_sk(sk);
937 int n;
938
939 if (peer != 0) {
940 if (sk->sk_state != TCP_ESTABLISHED)
941 return -ENOTCONN;
942 srose->srose_family = AF_ROSE;
943 srose->srose_addr = rose->dest_addr;
944 srose->srose_call = rose->dest_call;
945 srose->srose_ndigis = rose->dest_ndigis;
946 for (n = 0; n < rose->dest_ndigis; n++)
947 srose->srose_digis[n] = rose->dest_digis[n];
948 } else {
949 srose->srose_family = AF_ROSE;
950 srose->srose_addr = rose->source_addr;
951 srose->srose_call = rose->source_call;
952 srose->srose_ndigis = rose->source_ndigis;
953 for (n = 0; n < rose->source_ndigis; n++)
954 srose->srose_digis[n] = rose->source_digis[n];
955 }
956
957 *uaddr_len = sizeof(struct full_sockaddr_rose);
958 return 0;
959}
960
961int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
962{
963 struct sock *sk;
964 struct sock *make;
965 struct rose_sock *make_rose;
966 struct rose_facilities_struct facilities;
967 int n, len;
968
969 skb->sk = NULL; /* Initially we don't know who it's for */
970
971 /*
972 * skb->data points to the rose frame start
973 */
974 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
975
95b7d924
ED		 976 len = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
977 len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
1da177e4
LT		 978 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
979 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
980 return 0;
981 }
982
983 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
984
985 /*
986 * We can't accept the Call Request.
987 */
988 if (sk == NULL || sk_acceptq_is_full(sk) ||
989 (make = rose_make_new(sk)) == NULL) {
990 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
991 return 0;
992 }
993
994 skb->sk = make;
995 make->sk_state = TCP_ESTABLISHED;
996 make_rose = rose_sk(make);
997
998 make_rose->lci = lci;
999 make_rose->dest_addr = facilities.dest_addr;
1000 make_rose->dest_call = facilities.dest_call;
1001 make_rose->dest_ndigis = facilities.dest_ndigis;
1002 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1003 make_rose->dest_digis[n] = facilities.dest_digis[n];
1004 make_rose->source_addr = facilities.source_addr;
1005 make_rose->source_call = facilities.source_call;
1006 make_rose->source_ndigis = facilities.source_ndigis;
1007 for (n = 0 ; n < facilities.source_ndigis ; n++)
1008 make_rose->source_digis[n]= facilities.source_digis[n];
1009 make_rose->neighbour = neigh;
1010 make_rose->device = dev;
1011 make_rose->facilities = facilities;
1012
1013 make_rose->neighbour->use++;
1014
1015 if (rose_sk(sk)->defer) {
1016 make_rose->state = ROSE_STATE_5;
1017 } else {
1018 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1019 make_rose->state = ROSE_STATE_3;
1020 rose_start_idletimer(make);
1021 }
1022
1023 make_rose->condition = 0x00;
1024 make_rose->vs = 0;
1025 make_rose->va = 0;
1026 make_rose->vr = 0;
1027 make_rose->vl = 0;
1028 sk->sk_ack_backlog++;
1029
1030 rose_insert_socket(make);
1031
1032 skb_queue_head(&sk->sk_receive_queue, skb);
1033
1034 rose_start_heartbeat(make);
1035
1036 if (!sock_flag(sk, SOCK_DEAD))
1037 sk->sk_data_ready(sk, skb->len);
1038
1039 return 1;
1040}
1041
1042static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1043 struct msghdr *msg, size_t len)
1044{
1045 struct sock *sk = sock->sk;
1046 struct rose_sock *rose = rose_sk(sk);
1047 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1048 int err;
1049 struct full_sockaddr_rose srose;
1050 struct sk_buff *skb;
1051 unsigned char *asmptr;
1052 int n, size, qbit = 0;
1053
1054 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1055 return -EINVAL;
1056
1057 if (sock_flag(sk, SOCK_ZAPPED))
1058 return -EADDRNOTAVAIL;
1059
1060 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1061 send_sig(SIGPIPE, current, 0);
1062 return -EPIPE;
1063 }
1064
1065 if (rose->neighbour == NULL || rose->device == NULL)
1066 return -ENETUNREACH;
1067
1068 if (usrose != NULL) {
1069 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1070 return -EINVAL;
1071 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1072 memcpy(&srose, usrose, msg->msg_namelen);
1073 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1074 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1075 return -EISCONN;
1076 if (srose.srose_ndigis != rose->dest_ndigis)
1077 return -EISCONN;
1078 if (srose.srose_ndigis == rose->dest_ndigis) {
1079 for (n = 0 ; n < srose.srose_ndigis ; n++)
1080 if (ax25cmp(&rose->dest_digis[n],
1081 &srose.srose_digis[n]))
1082 return -EISCONN;
1083 }
1084 if (srose.srose_family != AF_ROSE)
1085 return -EINVAL;
1086 } else {
1087 if (sk->sk_state != TCP_ESTABLISHED)
1088 return -ENOTCONN;
1089
1090 srose.srose_family = AF_ROSE;
1091 srose.srose_addr = rose->dest_addr;
1092 srose.srose_call = rose->dest_call;
1093 srose.srose_ndigis = rose->dest_ndigis;
1094 for (n = 0 ; n < rose->dest_ndigis ; n++)
1095 srose.srose_digis[n] = rose->dest_digis[n];
1096 }
1097
1098 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1099
1100 /* Build a packet */
1101 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1102 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1103
1104 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1105 return err;
1106
1107 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1108
1109 /*
1110 * Put the data on the end
1111 */
1112 SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1113
eeeb0374
ACM		 1114 skb_reset_transport_header(skb);
1115 skb_put(skb, len);
1da177e4 1116
eeeb0374 1117 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1da177e4
LT		 1118 if (err) {
1119 kfree_skb(skb);
1120 return err;
1121 }
1122
1123 /*
1124 * If the Q BIT Include socket option is in force, the first
1125 * byte of the user data is the logical value of the Q Bit.
1126 */
1127 if (rose->qbitincl) {
1128 qbit = skb->data[0];
1129 skb_pull(skb, 1);
1130 }
1131
1132 /*
1133 * Push down the ROSE header
1134 */
1135 asmptr = skb_push(skb, ROSE_MIN_LEN);
1136
1137 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1138
1139 /* Build a ROSE Network header */
1140 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1141 asmptr[1] = (rose->lci >> 0) & 0xFF;
1142 asmptr[2] = ROSE_DATA;
1143
1144 if (qbit)
1145 asmptr[0] |= ROSE_Q_BIT;
1146
1147 SOCK_DEBUG(sk, "ROSE: Built header.\n");
1148
1149 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1150
1151 if (sk->sk_state != TCP_ESTABLISHED) {
1152 kfree_skb(skb);
1153 return -ENOTCONN;
1154 }
1155
1156#ifdef M_BIT
1157#define ROSE_PACLEN (256-ROSE_MIN_LEN)
1158 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1159 unsigned char header[ROSE_MIN_LEN];
1160 struct sk_buff *skbn;
1161 int frontlen;
1162 int lg;
1163
1164 /* Save a copy of the Header */
d626f62b 1165 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1da177e4
LT		 1166 skb_pull(skb, ROSE_MIN_LEN);
1167
1168 frontlen = skb_headroom(skb);
1169
1170 while (skb->len > 0) {
1171 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1172 kfree_skb(skb);
1173 return err;
1174 }
1175
1176 skbn->sk = sk;
1177 skbn->free = 1;
1178 skbn->arp = 1;
1179
1180 skb_reserve(skbn, frontlen);
1181
1182 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1183
1184 /* Copy the user data */
d626f62b 1185 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1da177e4
LT		 1186 skb_pull(skb, lg);
1187
1188 /* Duplicate the Header */
1189 skb_push(skbn, ROSE_MIN_LEN);
27d7ff46 1190 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1da177e4
LT		 1191
1192 if (skb->len > 0)
1193 skbn->data[2] |= M_BIT;
1194
1195 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1196 }
1197
1198 skb->free = 1;
1199 kfree_skb(skb);
1200 } else {
1201 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1202 }
1203#else
1204 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1205#endif
1206
1207 rose_kick(sk);
1208
1209 return len;
1210}
1211
1212
1213static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1214 struct msghdr *msg, size_t size, int flags)
1215{
1216 struct sock *sk = sock->sk;
1217 struct rose_sock *rose = rose_sk(sk);
1218 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1219 size_t copied;
1220 unsigned char *asmptr;
1221 struct sk_buff *skb;
1222 int n, er, qbit;
1223
1224 /*
1225 * This works for seqpacket too. The receiver has ordered the queue for
1226 * us! We do one quick check first though
1227 */
1228 if (sk->sk_state != TCP_ESTABLISHED)
1229 return -ENOTCONN;
1230
1231 /* Now we can treat all alike */
1232 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1233 return er;
1234
1235 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1236
1237 skb_pull(skb, ROSE_MIN_LEN);
1238
1239 if (rose->qbitincl) {
1240 asmptr = skb_push(skb, 1);
1241 *asmptr = qbit;
1242 }
1243
badff6d0 1244 skb_reset_transport_header(skb);
1da177e4
LT		 1245 copied = skb->len;
1246
1247 if (copied > size) {
1248 copied = size;
1249 msg->msg_flags |= MSG_TRUNC;
1250 }
1251
1252 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1253
1254 if (srose != NULL) {
1255 srose->srose_family = AF_ROSE;
1256 srose->srose_addr = rose->dest_addr;
1257 srose->srose_call = rose->dest_call;
1258 srose->srose_ndigis = rose->dest_ndigis;
1259 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1260 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1261 for (n = 0 ; n < rose->dest_ndigis ; n++)
1262 full_srose->srose_digis[n] = rose->dest_digis[n];
1263 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1264 } else {
1265 if (rose->dest_ndigis >= 1) {
1266 srose->srose_ndigis = 1;
1267 srose->srose_digi = rose->dest_digis[0];
1268 }
1269 msg->msg_namelen = sizeof(struct sockaddr_rose);
1270 }
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;
1288 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
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
LT		 1381{
1382 int i;
1383 struct sock *s;
1384 struct hlist_node *node;
1385
1386 spin_lock_bh(&rose_list_lock);
1387 if (*pos == 0)
1388 return SEQ_START_TOKEN;
3dcf7c5e 1389
1da177e4
LT		 1390 i = 1;
1391 sk_for_each(s, node, &rose_list) {
1392 if (i == *pos)
1393 return s;
1394 ++i;
1395 }
1396 return NULL;
1397}
1398
1399static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1400{
1401 ++*pos;
1402
3dcf7c5e 1403 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1da177e4
LT		 1404 : sk_next((struct sock *)v);
1405}
3dcf7c5e 1406
1da177e4 1407static void rose_info_stop(struct seq_file *seq, void *v)
95b7d924 1408 __releases(rose_list_lock)
1da177e4
LT		 1409{
1410 spin_unlock_bh(&rose_list_lock);
1411}
1412
1413static int rose_info_show(struct seq_file *seq, void *v)
1414{
f75268cd
RB		 1415 char buf[11];
1416
1da177e4 1417 if (v == SEQ_START_TOKEN)
3dcf7c5e 1418 seq_puts(seq,
1da177e4
LT		 1419 "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");
1420
1421 else {
1422 struct sock *s = v;
1423 struct rose_sock *rose = rose_sk(s);
1424 const char *devname, *callsign;
1425 const struct net_device *dev = rose->device;
1426
1427 if (!dev)
1428 devname = "???";
1429 else
1430 devname = dev->name;
3dcf7c5e 1431
1da177e4
LT		 1432 seq_printf(seq, "%-10s %-9s ",
1433 rose2asc(&rose->dest_addr),
f75268cd 1434 ax2asc(buf, &rose->dest_call));
1da177e4
LT		 1435
1436 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1437 callsign = "??????-?";
1438 else
f75268cd 1439 callsign = ax2asc(buf, &rose->source_call);
1da177e4
LT		 1440
1441 seq_printf(seq,
1442 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1443 rose2asc(&rose->source_addr),
1444 callsign,
1445 devname,
1446 rose->lci & 0x0FFF,
1447 (rose->neighbour) ? rose->neighbour->number : 0,
1448 rose->state,
1449 rose->vs,
1450 rose->vr,
1451 rose->va,
1452 ax25_display_timer(&rose->timer) / HZ,
1453 rose->t1 / HZ,
1454 rose->t2 / HZ,
1455 rose->t3 / HZ,
1456 rose->hb / HZ,
1457 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1458 rose->idle / (60 * HZ),
1459 atomic_read(&s->sk_wmem_alloc),
1460 atomic_read(&s->sk_rmem_alloc),
1461 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1462 }
1463
1464 return 0;
1465}
1466
56b3d975 1467static const struct seq_operations rose_info_seqops = {
1da177e4
LT		 1468 .start = rose_info_start,
1469 .next = rose_info_next,
1470 .stop = rose_info_stop,
1471 .show = rose_info_show,
1472};
1473
1474static int rose_info_open(struct inode *inode, struct file *file)
1475{
1476 return seq_open(file, &rose_info_seqops);
1477}
1478
da7071d7 1479static const struct file_operations rose_info_fops = {
1da177e4
LT		 1480 .owner = THIS_MODULE,
1481 .open = rose_info_open,
1482 .read = seq_read,
1483 .llseek = seq_lseek,
1484 .release = seq_release,
1485};
1486#endif /* CONFIG_PROC_FS */
1487
1488static struct net_proto_family rose_family_ops = {
1489 .family = PF_ROSE,
1490 .create = rose_create,
1491 .owner = THIS_MODULE,
1492};
1493
1494static struct proto_ops rose_proto_ops = {
1495 .family = PF_ROSE,
1496 .owner = THIS_MODULE,
1497 .release = rose_release,
1498 .bind = rose_bind,
1499 .connect = rose_connect,
1500 .socketpair = sock_no_socketpair,
1501 .accept = rose_accept,
1502 .getname = rose_getname,
1503 .poll = datagram_poll,
1504 .ioctl = rose_ioctl,
1505 .listen = rose_listen,
1506 .shutdown = sock_no_shutdown,
1507 .setsockopt = rose_setsockopt,
1508 .getsockopt = rose_getsockopt,
1509 .sendmsg = rose_sendmsg,
1510 .recvmsg = rose_recvmsg,
1511 .mmap = sock_no_mmap,
1512 .sendpage = sock_no_sendpage,
1513};
1514
1515static struct notifier_block rose_dev_notifier = {
1516 .notifier_call = rose_device_event,
1517};
1518
1519static struct net_device **dev_rose;
1520
8d5cf596
RB		 1521static struct ax25_protocol rose_pid = {
1522 .pid = AX25_P_ROSE,
1523 .func = rose_route_frame
1524};
1525
a4282717
RB		 1526static struct ax25_linkfail rose_linkfail_notifier = {
1527 .func = rose_link_failed
1528};
1529
1da177e4
LT		 1530static int __init rose_proto_init(void)
1531{
1532 int i;
a83cd2cc 1533 int rc;
1da177e4 1534
a83cd2cc
AD		 1535 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1536 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1537 rc = -EINVAL;
1538 goto out;
1539 }
1540
1541 rc = proto_register(&rose_proto, 0);
1da177e4
LT		 1542 if (rc != 0)
1543 goto out;
1544
1545 rose_callsign = null_ax25_address;
1546
1b30dd35 1547 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1da177e4
LT		 1548 if (dev_rose == NULL) {
1549 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
a83cd2cc
AD		 1550 rc = -ENOMEM;
1551 goto out_proto_unregister;
1da177e4
LT		 1552 }
1553
1da177e4
LT		 1554 for (i = 0; i < rose_ndevs; i++) {
1555 struct net_device *dev;
1556 char name[IFNAMSIZ];
1557
1558 sprintf(name, "rose%d", i);
3dcf7c5e 1559 dev = alloc_netdev(sizeof(struct net_device_stats),
1da177e4
LT		 1560 name, rose_setup);
1561 if (!dev) {
1562 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
70ff3b66 1563 rc = -ENOMEM;
1da177e4
LT		 1564 goto fail;
1565 }
70ff3b66
AD		 1566 rc = register_netdev(dev);
1567 if (rc) {
520d1b83 1568 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1da177e4
LT		 1569 free_netdev(dev);
1570 goto fail;
1571 }
b1d21ca8 1572 lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key);
1da177e4
LT		 1573 dev_rose[i] = dev;
1574 }
1575
1576 sock_register(&rose_family_ops);
1577 register_netdevice_notifier(&rose_dev_notifier);
1da177e4 1578
8d5cf596 1579 ax25_register_pid(&rose_pid);
a4282717 1580 ax25_linkfail_register(&rose_linkfail_notifier);
1da177e4
LT		 1581
1582#ifdef CONFIG_SYSCTL
1583 rose_register_sysctl();
1584#endif
1585 rose_loopback_init();
1586
1587 rose_add_loopback_neigh();
1588
457c4cbc
EB		 1589 proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1590 proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1591 proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1592 proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1da177e4
LT		 1593out:
1594 return rc;
1595fail:
1596 while (--i >= 0) {
1597 unregister_netdev(dev_rose[i]);
1598 free_netdev(dev_rose[i]);
1599 }
1600 kfree(dev_rose);
a83cd2cc 1601out_proto_unregister:
1da177e4 1602 proto_unregister(&rose_proto);
70ff3b66 1603 goto out;
1da177e4
LT		 1604}
1605module_init(rose_proto_init);
1606
1607module_param(rose_ndevs, int, 0);
1608MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1609
1610MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1611MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1612MODULE_LICENSE("GPL");
1613MODULE_ALIAS_NETPROTO(PF_ROSE);
1614
1615static void __exit rose_exit(void)
1616{
1617 int i;
1618
457c4cbc
EB		 1619 proc_net_remove(&init_net, "rose");
1620 proc_net_remove(&init_net, "rose_neigh");
1621 proc_net_remove(&init_net, "rose_nodes");
1622 proc_net_remove(&init_net, "rose_routes");
1da177e4
LT		 1623 rose_loopback_clear();
1624
1625 rose_rt_free();
1626
1627 ax25_protocol_release(AX25_P_ROSE);
a4282717 1628 ax25_linkfail_release(&rose_linkfail_notifier);
1da177e4
LT		 1629
1630 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1631 ax25_listen_release(&rose_callsign, NULL);
1632
1633#ifdef CONFIG_SYSCTL
1634 rose_unregister_sysctl();
1635#endif
1636 unregister_netdevice_notifier(&rose_dev_notifier);
1637
1638 sock_unregister(PF_ROSE);
1639
1640 for (i = 0; i < rose_ndevs; i++) {
1641 struct net_device *dev = dev_rose[i];
1642
1643 if (dev) {
1644 unregister_netdev(dev);
1645 free_netdev(dev);
1646 }
1647 }
1648
1649 kfree(dev_rose);
1650 proto_unregister(&rose_proto);
1651}
1652
1653module_exit(rose_exit);
ubuntu-bionic-kernel mirror