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[NET]: Make packet reception network namespace safe
[linux-2.6-block.git] / net / rose / af_rose.c
CommitLineData
1da177e4
LT		 1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
8 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
9 * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
10 * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
11 */
4fc268d2 12
4fc268d2 13#include <linux/capability.h>
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/moduleparam.h>
16#include <linux/init.h>
17#include <linux/errno.h>
18#include <linux/types.h>
19#include <linux/socket.h>
20#include <linux/in.h>
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{
119 int i, j;
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
200 if (event != NETDEV_DOWN)
201 return NOTIFY_DONE;
202
203 switch (dev->type) {
204 case ARPHRD_ROSE:
205 rose_kill_by_device(dev);
206 break;
207 case ARPHRD_AX25:
208 rose_link_device_down(dev);
209 rose_rt_device_down(dev);
210 break;
211 }
212
213 return NOTIFY_DONE;
214}
215
216/*
217 * Add a socket to the bound sockets list.
218 */
219static void rose_insert_socket(struct sock *sk)
220{
221
222 spin_lock_bh(&rose_list_lock);
223 sk_add_node(sk, &rose_list);
224 spin_unlock_bh(&rose_list_lock);
225}
226
227/*
228 * Find a socket that wants to accept the Call Request we just
229 * received.
230 */
231static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
232{
233 struct sock *s;
234 struct hlist_node *node;
235
236 spin_lock_bh(&rose_list_lock);
237 sk_for_each(s, node, &rose_list) {
238 struct rose_sock *rose = rose_sk(s);
239
240 if (!rosecmp(&rose->source_addr, addr) &&
241 !ax25cmp(&rose->source_call, call) &&
242 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
243 goto found;
244 }
245
246 sk_for_each(s, node, &rose_list) {
247 struct rose_sock *rose = rose_sk(s);
248
249 if (!rosecmp(&rose->source_addr, addr) &&
250 !ax25cmp(&rose->source_call, &null_ax25_address) &&
251 s->sk_state == TCP_LISTEN)
252 goto found;
253 }
254 s = NULL;
255found:
256 spin_unlock_bh(&rose_list_lock);
257 return s;
258}
259
260/*
261 * Find a connected ROSE socket given my LCI and device.
262 */
263struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
264{
265 struct sock *s;
266 struct hlist_node *node;
267
268 spin_lock_bh(&rose_list_lock);
269 sk_for_each(s, node, &rose_list) {
270 struct rose_sock *rose = rose_sk(s);
271
272 if (rose->lci == lci && rose->neighbour == neigh)
273 goto found;
274 }
275 s = NULL;
276found:
277 spin_unlock_bh(&rose_list_lock);
278 return s;
279}
280
281/*
282 * Find a unique LCI for a given device.
283 */
284unsigned int rose_new_lci(struct rose_neigh *neigh)
285{
286 int lci;
287
288 if (neigh->dce_mode) {
289 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
290 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
291 return lci;
292 } else {
293 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
294 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
295 return lci;
296 }
297
298 return 0;
299}
300
301/*
302 * Deferred destroy.
303 */
304void rose_destroy_socket(struct sock *);
305
306/*
307 * Handler for deferred kills.
308 */
309static void rose_destroy_timer(unsigned long data)
310{
311 rose_destroy_socket((struct sock *)data);
312}
313
314/*
315 * This is called from user mode and the timers. Thus it protects itself
316 * against interrupt users but doesn't worry about being called during
317 * work. Once it is removed from the queue no interrupt or bottom half
318 * will touch it and we are (fairly 8-) ) safe.
319 */
320void rose_destroy_socket(struct sock *sk)
321{
322 struct sk_buff *skb;
323
324 rose_remove_socket(sk);
325 rose_stop_heartbeat(sk);
326 rose_stop_idletimer(sk);
327 rose_stop_timer(sk);
328
329 rose_clear_queues(sk); /* Flush the queues */
330
331 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
332 if (skb->sk != sk) { /* A pending connection */
333 /* Queue the unaccepted socket for death */
334 sock_set_flag(skb->sk, SOCK_DEAD);
335 rose_start_heartbeat(skb->sk);
336 rose_sk(skb->sk)->state = ROSE_STATE_0;
337 }
338
339 kfree_skb(skb);
340 }
341
342 if (atomic_read(&sk->sk_wmem_alloc) ||
343 atomic_read(&sk->sk_rmem_alloc)) {
344 /* Defer: outstanding buffers */
345 init_timer(&sk->sk_timer);
346 sk->sk_timer.expires = jiffies + 10 * HZ;
347 sk->sk_timer.function = rose_destroy_timer;
348 sk->sk_timer.data = (unsigned long)sk;
349 add_timer(&sk->sk_timer);
350 } else
351 sock_put(sk);
352}
353
354/*
355 * Handling for system calls applied via the various interfaces to a
356 * ROSE socket object.
357 */
358
359static int rose_setsockopt(struct socket *sock, int level, int optname,
360 char __user *optval, int optlen)
361{
362 struct sock *sk = sock->sk;
363 struct rose_sock *rose = rose_sk(sk);
364 int opt;
365
366 if (level != SOL_ROSE)
367 return -ENOPROTOOPT;
368
369 if (optlen < sizeof(int))
370 return -EINVAL;
371
372 if (get_user(opt, (int __user *)optval))
373 return -EFAULT;
374
375 switch (optname) {
376 case ROSE_DEFER:
377 rose->defer = opt ? 1 : 0;
378 return 0;
379
380 case ROSE_T1:
381 if (opt < 1)
382 return -EINVAL;
383 rose->t1 = opt * HZ;
384 return 0;
385
386 case ROSE_T2:
387 if (opt < 1)
388 return -EINVAL;
389 rose->t2 = opt * HZ;
390 return 0;
391
392 case ROSE_T3:
393 if (opt < 1)
394 return -EINVAL;
395 rose->t3 = opt * HZ;
396 return 0;
397
398 case ROSE_HOLDBACK:
399 if (opt < 1)
400 return -EINVAL;
401 rose->hb = opt * HZ;
402 return 0;
403
404 case ROSE_IDLE:
405 if (opt < 0)
406 return -EINVAL;
407 rose->idle = opt * 60 * HZ;
408 return 0;
409
410 case ROSE_QBITINCL:
411 rose->qbitincl = opt ? 1 : 0;
412 return 0;
413
414 default:
415 return -ENOPROTOOPT;
416 }
417}
418
419static int rose_getsockopt(struct socket *sock, int level, int optname,
420 char __user *optval, int __user *optlen)
421{
422 struct sock *sk = sock->sk;
423 struct rose_sock *rose = rose_sk(sk);
424 int val = 0;
425 int len;
426
427 if (level != SOL_ROSE)
428 return -ENOPROTOOPT;
429
430 if (get_user(len, optlen))
431 return -EFAULT;
432
433 if (len < 0)
434 return -EINVAL;
435
436 switch (optname) {
437 case ROSE_DEFER:
438 val = rose->defer;
439 break;
440
441 case ROSE_T1:
442 val = rose->t1 / HZ;
443 break;
444
445 case ROSE_T2:
446 val = rose->t2 / HZ;
447 break;
448
449 case ROSE_T3:
450 val = rose->t3 / HZ;
451 break;
452
453 case ROSE_HOLDBACK:
454 val = rose->hb / HZ;
455 break;
456
457 case ROSE_IDLE:
458 val = rose->idle / (60 * HZ);
459 break;
460
461 case ROSE_QBITINCL:
462 val = rose->qbitincl;
463 break;
464
465 default:
466 return -ENOPROTOOPT;
467 }
468
469 len = min_t(unsigned int, len, sizeof(int));
470
471 if (put_user(len, optlen))
472 return -EFAULT;
473
474 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
475}
476
477static int rose_listen(struct socket *sock, int backlog)
478{
479 struct sock *sk = sock->sk;
480
481 if (sk->sk_state != TCP_LISTEN) {
482 struct rose_sock *rose = rose_sk(sk);
483
484 rose->dest_ndigis = 0;
485 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
486 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
487 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
488 sk->sk_max_ack_backlog = backlog;
489 sk->sk_state = TCP_LISTEN;
490 return 0;
491 }
492
493 return -EOPNOTSUPP;
494}
495
496static struct proto rose_proto = {
497 .name = "ROSE",
498 .owner = THIS_MODULE,
499 .obj_size = sizeof(struct rose_sock),
500};
501
1b8d7ae4 502static int rose_create(struct net *net, struct socket *sock, int protocol)
1da177e4
LT		 503{
504 struct sock *sk;
505 struct rose_sock *rose;
506
1b8d7ae4
EB		 507 if (net != &init_net)
508 return -EAFNOSUPPORT;
509
1da177e4
LT		 510 if (sock->type != SOCK_SEQPACKET || protocol != 0)
511 return -ESOCKTNOSUPPORT;
512
1b8d7ae4 513 if ((sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
1da177e4
LT		 514 return -ENOMEM;
515
516 rose = rose_sk(sk);
517
518 sock_init_data(sock, sk);
519
520 skb_queue_head_init(&rose->ack_queue);
521#ifdef M_BIT
522 skb_queue_head_init(&rose->frag_queue);
523 rose->fraglen = 0;
524#endif
525
526 sock->ops = &rose_proto_ops;
527 sk->sk_protocol = protocol;
528
529 init_timer(&rose->timer);
530 init_timer(&rose->idletimer);
531
82e84249
RB		 532 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
533 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
534 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
535 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
536 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
1da177e4
LT		 537
538 rose->state = ROSE_STATE_0;
539
540 return 0;
541}
542
543static struct sock *rose_make_new(struct sock *osk)
544{
545 struct sock *sk;
546 struct rose_sock *rose, *orose;
547
548 if (osk->sk_type != SOCK_SEQPACKET)
549 return NULL;
550
1b8d7ae4 551 if ((sk = sk_alloc(osk->sk_net, PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
1da177e4
LT		 552 return NULL;
553
554 rose = rose_sk(sk);
555
556 sock_init_data(NULL, sk);
557
558 skb_queue_head_init(&rose->ack_queue);
559#ifdef M_BIT
560 skb_queue_head_init(&rose->frag_queue);
561 rose->fraglen = 0;
562#endif
563
564 sk->sk_type = osk->sk_type;
565 sk->sk_socket = osk->sk_socket;
566 sk->sk_priority = osk->sk_priority;
567 sk->sk_protocol = osk->sk_protocol;
568 sk->sk_rcvbuf = osk->sk_rcvbuf;
569 sk->sk_sndbuf = osk->sk_sndbuf;
570 sk->sk_state = TCP_ESTABLISHED;
571 sk->sk_sleep = osk->sk_sleep;
53b924b3 572 sock_copy_flags(sk, osk);
1da177e4
LT		 573
574 init_timer(&rose->timer);
575 init_timer(&rose->idletimer);
576
577 orose = rose_sk(osk);
578 rose->t1 = orose->t1;
579 rose->t2 = orose->t2;
580 rose->t3 = orose->t3;
581 rose->hb = orose->hb;
582 rose->idle = orose->idle;
583 rose->defer = orose->defer;
584 rose->device = orose->device;
585 rose->qbitincl = orose->qbitincl;
586
587 return sk;
588}
589
590static int rose_release(struct socket *sock)
591{
592 struct sock *sk = sock->sk;
593 struct rose_sock *rose;
594
595 if (sk == NULL) return 0;
596
597 rose = rose_sk(sk);
598
599 switch (rose->state) {
600 case ROSE_STATE_0:
601 rose_disconnect(sk, 0, -1, -1);
602 rose_destroy_socket(sk);
603 break;
604
605 case ROSE_STATE_2:
606 rose->neighbour->use--;
607 rose_disconnect(sk, 0, -1, -1);
608 rose_destroy_socket(sk);
609 break;
610
611 case ROSE_STATE_1:
612 case ROSE_STATE_3:
613 case ROSE_STATE_4:
614 case ROSE_STATE_5:
615 rose_clear_queues(sk);
616 rose_stop_idletimer(sk);
617 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
618 rose_start_t3timer(sk);
619 rose->state = ROSE_STATE_2;
620 sk->sk_state = TCP_CLOSE;
621 sk->sk_shutdown |= SEND_SHUTDOWN;
622 sk->sk_state_change(sk);
623 sock_set_flag(sk, SOCK_DEAD);
624 sock_set_flag(sk, SOCK_DESTROY);
625 break;
626
627 default:
628 break;
629 }
630
631 sock->sk = NULL;
632
633 return 0;
634}
635
636static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
637{
638 struct sock *sk = sock->sk;
639 struct rose_sock *rose = rose_sk(sk);
640 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
641 struct net_device *dev;
01d7dd0e
RB		 642 ax25_address *source;
643 ax25_uid_assoc *user;
1da177e4
LT		 644 int n;
645
646 if (!sock_flag(sk, SOCK_ZAPPED))
647 return -EINVAL;
648
649 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
650 return -EINVAL;
651
652 if (addr->srose_family != AF_ROSE)
653 return -EINVAL;
654
655 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
656 return -EINVAL;
657
658 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
659 return -EINVAL;
660
661 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
662 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
663 return -EADDRNOTAVAIL;
664 }
665
666 source = &addr->srose_call;
667
01d7dd0e
RB		 668 user = ax25_findbyuid(current->euid);
669 if (user) {
670 rose->source_call = user->call;
671 ax25_uid_put(user);
672 } else {
1da177e4
LT		 673 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
674 return -EACCES;
01d7dd0e 675 rose->source_call = *source;
1da177e4
LT		 676 }
677
678 rose->source_addr = addr->srose_addr;
1da177e4
LT		 679 rose->device = dev;
680 rose->source_ndigis = addr->srose_ndigis;
681
682 if (addr_len == sizeof(struct full_sockaddr_rose)) {
683 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
684 for (n = 0 ; n < addr->srose_ndigis ; n++)
685 rose->source_digis[n] = full_addr->srose_digis[n];
686 } else {
687 if (rose->source_ndigis == 1) {
688 rose->source_digis[0] = addr->srose_digi;
689 }
690 }
691
692 rose_insert_socket(sk);
693
694 sock_reset_flag(sk, SOCK_ZAPPED);
695 SOCK_DEBUG(sk, "ROSE: socket is bound\n");
696 return 0;
697}
698
699static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
700{
701 struct sock *sk = sock->sk;
702 struct rose_sock *rose = rose_sk(sk);
703 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
704 unsigned char cause, diagnostic;
1da177e4 705 struct net_device *dev;
01d7dd0e 706 ax25_uid_assoc *user;
2536b94a 707 int n, err = 0;
1da177e4
LT		 708
709 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
710 return -EINVAL;
711
712 if (addr->srose_family != AF_ROSE)
713 return -EINVAL;
714
715 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
716 return -EINVAL;
717
718 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
719 return -EINVAL;
720
721 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
722 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
723 return -EINVAL;
724
2536b94a
RB		 725 lock_sock(sk);
726
727 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
728 /* Connect completed during a ERESTARTSYS event */
729 sock->state = SS_CONNECTED;
730 goto out_release;
731 }
732
733 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
734 sock->state = SS_UNCONNECTED;
735 err = -ECONNREFUSED;
736 goto out_release;
737 }
738
739 if (sk->sk_state == TCP_ESTABLISHED) {
740 /* No reconnect on a seqpacket socket */
741 err = -EISCONN;
742 goto out_release;
743 }
744
745 sk->sk_state = TCP_CLOSE;
746 sock->state = SS_UNCONNECTED;
747
1da177e4
LT		 748 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
749 &diagnostic);
750 if (!rose->neighbour)
751 return -ENETUNREACH;
752
753 rose->lci = rose_new_lci(rose->neighbour);
2536b94a
RB		 754 if (!rose->lci) {
755 err = -ENETUNREACH;
756 goto out_release;
757 }
1da177e4
LT		 758
759 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
760 sock_reset_flag(sk, SOCK_ZAPPED);
761
2536b94a
RB		 762 if ((dev = rose_dev_first()) == NULL) {
763 err = -ENETUNREACH;
764 goto out_release;
765 }
1da177e4 766
01d7dd0e 767 user = ax25_findbyuid(current->euid);
2536b94a
RB		 768 if (!user) {
769 err = -EINVAL;
770 goto out_release;
771 }
1da177e4
LT		 772
773 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
01d7dd0e 774 rose->source_call = user->call;
1da177e4 775 rose->device = dev;
01d7dd0e 776 ax25_uid_put(user);
1da177e4
LT		 777
778 rose_insert_socket(sk); /* Finish the bind */
779 }
d85838c5 780rose_try_next_neigh:
1da177e4
LT		 781 rose->dest_addr = addr->srose_addr;
782 rose->dest_call = addr->srose_call;
783 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
784 rose->dest_ndigis = addr->srose_ndigis;
785
786 if (addr_len == sizeof(struct full_sockaddr_rose)) {
787 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
788 for (n = 0 ; n < addr->srose_ndigis ; n++)
789 rose->dest_digis[n] = full_addr->srose_digis[n];
790 } else {
791 if (rose->dest_ndigis == 1) {
792 rose->dest_digis[0] = addr->srose_digi;
793 }
794 }
795
796 /* Move to connecting socket, start sending Connect Requests */
797 sock->state = SS_CONNECTING;
798 sk->sk_state = TCP_SYN_SENT;
799
800 rose->state = ROSE_STATE_1;
801
802 rose->neighbour->use++;
803
804 rose_write_internal(sk, ROSE_CALL_REQUEST);
805 rose_start_heartbeat(sk);
806 rose_start_t1timer(sk);
807
808 /* Now the loop */
2536b94a
RB		 809 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
810 err = -EINPROGRESS;
811 goto out_release;
812 }
1da177e4
LT		 813
814 /*
815 * A Connect Ack with Choke or timeout or failed routing will go to
816 * closed.
817 */
818 if (sk->sk_state == TCP_SYN_SENT) {
75606dc6 819 DEFINE_WAIT(wait);
1da177e4 820
1da177e4 821 for (;;) {
75606dc6 822 prepare_to_wait(sk->sk_sleep, &wait,
6140efb5 823 TASK_INTERRUPTIBLE);
1da177e4
LT		 824 if (sk->sk_state != TCP_SYN_SENT)
825 break;
75606dc6
RB		 826 if (!signal_pending(current)) {
827 release_sock(sk);
1da177e4 828 schedule();
2536b94a 829 lock_sock(sk);
1da177e4
LT		 830 continue;
831 }
75606dc6
RB		 832 err = -ERESTARTSYS;
833 break;
1da177e4 834 }
75606dc6
RB		 835 finish_wait(sk->sk_sleep, &wait);
836
837 if (err)
838 goto out_release;
1da177e4
LT		 839 }
840
841 if (sk->sk_state != TCP_ESTABLISHED) {
d85838c5
RB		 842 /* Try next neighbour */
843 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic);
844 if (rose->neighbour)
845 goto rose_try_next_neigh;
2536b94a
RB		 846
847 /* No more neighbours */
1da177e4 848 sock->state = SS_UNCONNECTED;
2536b94a
RB		 849 err = sock_error(sk); /* Always set at this point */
850 goto out_release;
1da177e4
LT		 851 }
852
853 sock->state = SS_CONNECTED;
854
2536b94a
RB		 855out_release:
856 release_sock(sk);
857
858 return err;
1da177e4
LT		 859}
860
861static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
862{
1da177e4
LT		 863 struct sk_buff *skb;
864 struct sock *newsk;
75606dc6 865 DEFINE_WAIT(wait);
1da177e4
LT		 866 struct sock *sk;
867 int err = 0;
868
869 if ((sk = sock->sk) == NULL)
870 return -EINVAL;
871
872 lock_sock(sk);
873 if (sk->sk_type != SOCK_SEQPACKET) {
874 err = -EOPNOTSUPP;
75606dc6 875 goto out_release;
1da177e4
LT		 876 }
877
878 if (sk->sk_state != TCP_LISTEN) {
879 err = -EINVAL;
75606dc6 880 goto out_release;
1da177e4
LT		 881 }
882
883 /*
884 * The write queue this time is holding sockets ready to use
885 * hooked into the SABM we saved
886 */
1da177e4 887 for (;;) {
75606dc6
RB		 888 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
889
1da177e4
LT		 890 skb = skb_dequeue(&sk->sk_receive_queue);
891 if (skb)
892 break;
893
1da177e4 894 if (flags & O_NONBLOCK) {
75606dc6
RB		 895 err = -EWOULDBLOCK;
896 break;
1da177e4 897 }
75606dc6
RB		 898 if (!signal_pending(current)) {
899 release_sock(sk);
1da177e4
LT		 900 schedule();
901 lock_sock(sk);
902 continue;
903 }
75606dc6
RB		 904 err = -ERESTARTSYS;
905 break;
1da177e4 906 }
75606dc6
RB		 907 finish_wait(sk->sk_sleep, &wait);
908 if (err)
909 goto out_release;
1da177e4
LT		 910
911 newsk = skb->sk;
912 newsk->sk_socket = newsock;
913 newsk->sk_sleep = &newsock->wait;
914
915 /* Now attach up the new socket */
916 skb->sk = NULL;
917 kfree_skb(skb);
918 sk->sk_ack_backlog--;
919 newsock->sk = newsk;
920
75606dc6 921out_release:
1da177e4
LT		 922 release_sock(sk);
923
924 return err;
925}
926
927static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
928 int *uaddr_len, int peer)
929{
930 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
931 struct sock *sk = sock->sk;
932 struct rose_sock *rose = rose_sk(sk);
933 int n;
934
935 if (peer != 0) {
936 if (sk->sk_state != TCP_ESTABLISHED)
937 return -ENOTCONN;
938 srose->srose_family = AF_ROSE;
939 srose->srose_addr = rose->dest_addr;
940 srose->srose_call = rose->dest_call;
941 srose->srose_ndigis = rose->dest_ndigis;
942 for (n = 0; n < rose->dest_ndigis; n++)
943 srose->srose_digis[n] = rose->dest_digis[n];
944 } else {
945 srose->srose_family = AF_ROSE;
946 srose->srose_addr = rose->source_addr;
947 srose->srose_call = rose->source_call;
948 srose->srose_ndigis = rose->source_ndigis;
949 for (n = 0; n < rose->source_ndigis; n++)
950 srose->srose_digis[n] = rose->source_digis[n];
951 }
952
953 *uaddr_len = sizeof(struct full_sockaddr_rose);
954 return 0;
955}
956
957int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
958{
959 struct sock *sk;
960 struct sock *make;
961 struct rose_sock *make_rose;
962 struct rose_facilities_struct facilities;
963 int n, len;
964
965 skb->sk = NULL; /* Initially we don't know who it's for */
966
967 /*
968 * skb->data points to the rose frame start
969 */
970 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
971
972 len = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
973 len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
974 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
975 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
976 return 0;
977 }
978
979 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
980
981 /*
982 * We can't accept the Call Request.
983 */
984 if (sk == NULL || sk_acceptq_is_full(sk) ||
985 (make = rose_make_new(sk)) == NULL) {
986 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
987 return 0;
988 }
989
990 skb->sk = make;
991 make->sk_state = TCP_ESTABLISHED;
992 make_rose = rose_sk(make);
993
994 make_rose->lci = lci;
995 make_rose->dest_addr = facilities.dest_addr;
996 make_rose->dest_call = facilities.dest_call;
997 make_rose->dest_ndigis = facilities.dest_ndigis;
998 for (n = 0 ; n < facilities.dest_ndigis ; n++)
999 make_rose->dest_digis[n] = facilities.dest_digis[n];
1000 make_rose->source_addr = facilities.source_addr;
1001 make_rose->source_call = facilities.source_call;
1002 make_rose->source_ndigis = facilities.source_ndigis;
1003 for (n = 0 ; n < facilities.source_ndigis ; n++)
1004 make_rose->source_digis[n]= facilities.source_digis[n];
1005 make_rose->neighbour = neigh;
1006 make_rose->device = dev;
1007 make_rose->facilities = facilities;
1008
1009 make_rose->neighbour->use++;
1010
1011 if (rose_sk(sk)->defer) {
1012 make_rose->state = ROSE_STATE_5;
1013 } else {
1014 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1015 make_rose->state = ROSE_STATE_3;
1016 rose_start_idletimer(make);
1017 }
1018
1019 make_rose->condition = 0x00;
1020 make_rose->vs = 0;
1021 make_rose->va = 0;
1022 make_rose->vr = 0;
1023 make_rose->vl = 0;
1024 sk->sk_ack_backlog++;
1025
1026 rose_insert_socket(make);
1027
1028 skb_queue_head(&sk->sk_receive_queue, skb);
1029
1030 rose_start_heartbeat(make);
1031
1032 if (!sock_flag(sk, SOCK_DEAD))
1033 sk->sk_data_ready(sk, skb->len);
1034
1035 return 1;
1036}
1037
1038static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1039 struct msghdr *msg, size_t len)
1040{
1041 struct sock *sk = sock->sk;
1042 struct rose_sock *rose = rose_sk(sk);
1043 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1044 int err;
1045 struct full_sockaddr_rose srose;
1046 struct sk_buff *skb;
1047 unsigned char *asmptr;
1048 int n, size, qbit = 0;
1049
1050 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1051 return -EINVAL;
1052
1053 if (sock_flag(sk, SOCK_ZAPPED))
1054 return -EADDRNOTAVAIL;
1055
1056 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1057 send_sig(SIGPIPE, current, 0);
1058 return -EPIPE;
1059 }
1060
1061 if (rose->neighbour == NULL || rose->device == NULL)
1062 return -ENETUNREACH;
1063
1064 if (usrose != NULL) {
1065 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1066 return -EINVAL;
1067 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1068 memcpy(&srose, usrose, msg->msg_namelen);
1069 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1070 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1071 return -EISCONN;
1072 if (srose.srose_ndigis != rose->dest_ndigis)
1073 return -EISCONN;
1074 if (srose.srose_ndigis == rose->dest_ndigis) {
1075 for (n = 0 ; n < srose.srose_ndigis ; n++)
1076 if (ax25cmp(&rose->dest_digis[n],
1077 &srose.srose_digis[n]))
1078 return -EISCONN;
1079 }
1080 if (srose.srose_family != AF_ROSE)
1081 return -EINVAL;
1082 } else {
1083 if (sk->sk_state != TCP_ESTABLISHED)
1084 return -ENOTCONN;
1085
1086 srose.srose_family = AF_ROSE;
1087 srose.srose_addr = rose->dest_addr;
1088 srose.srose_call = rose->dest_call;
1089 srose.srose_ndigis = rose->dest_ndigis;
1090 for (n = 0 ; n < rose->dest_ndigis ; n++)
1091 srose.srose_digis[n] = rose->dest_digis[n];
1092 }
1093
1094 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1095
1096 /* Build a packet */
1097 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1098 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1099
1100 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1101 return err;
1102
1103 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1104
1105 /*
1106 * Put the data on the end
1107 */
1108 SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1109
eeeb0374
ACM		 1110 skb_reset_transport_header(skb);
1111 skb_put(skb, len);
1da177e4 1112
eeeb0374 1113 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1da177e4
LT		 1114 if (err) {
1115 kfree_skb(skb);
1116 return err;
1117 }
1118
1119 /*
1120 * If the Q BIT Include socket option is in force, the first
1121 * byte of the user data is the logical value of the Q Bit.
1122 */
1123 if (rose->qbitincl) {
1124 qbit = skb->data[0];
1125 skb_pull(skb, 1);
1126 }
1127
1128 /*
1129 * Push down the ROSE header
1130 */
1131 asmptr = skb_push(skb, ROSE_MIN_LEN);
1132
1133 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1134
1135 /* Build a ROSE Network header */
1136 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1137 asmptr[1] = (rose->lci >> 0) & 0xFF;
1138 asmptr[2] = ROSE_DATA;
1139
1140 if (qbit)
1141 asmptr[0] |= ROSE_Q_BIT;
1142
1143 SOCK_DEBUG(sk, "ROSE: Built header.\n");
1144
1145 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1146
1147 if (sk->sk_state != TCP_ESTABLISHED) {
1148 kfree_skb(skb);
1149 return -ENOTCONN;
1150 }
1151
1152#ifdef M_BIT
1153#define ROSE_PACLEN (256-ROSE_MIN_LEN)
1154 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1155 unsigned char header[ROSE_MIN_LEN];
1156 struct sk_buff *skbn;
1157 int frontlen;
1158 int lg;
1159
1160 /* Save a copy of the Header */
d626f62b 1161 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1da177e4
LT		 1162 skb_pull(skb, ROSE_MIN_LEN);
1163
1164 frontlen = skb_headroom(skb);
1165
1166 while (skb->len > 0) {
1167 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1168 kfree_skb(skb);
1169 return err;
1170 }
1171
1172 skbn->sk = sk;
1173 skbn->free = 1;
1174 skbn->arp = 1;
1175
1176 skb_reserve(skbn, frontlen);
1177
1178 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1179
1180 /* Copy the user data */
d626f62b 1181 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1da177e4
LT		 1182 skb_pull(skb, lg);
1183
1184 /* Duplicate the Header */
1185 skb_push(skbn, ROSE_MIN_LEN);
27d7ff46 1186 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1da177e4
LT		 1187
1188 if (skb->len > 0)
1189 skbn->data[2] |= M_BIT;
1190
1191 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1192 }
1193
1194 skb->free = 1;
1195 kfree_skb(skb);
1196 } else {
1197 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1198 }
1199#else
1200 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1201#endif
1202
1203 rose_kick(sk);
1204
1205 return len;
1206}
1207
1208
1209static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1210 struct msghdr *msg, size_t size, int flags)
1211{
1212 struct sock *sk = sock->sk;
1213 struct rose_sock *rose = rose_sk(sk);
1214 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1215 size_t copied;
1216 unsigned char *asmptr;
1217 struct sk_buff *skb;
1218 int n, er, qbit;
1219
1220 /*
1221 * This works for seqpacket too. The receiver has ordered the queue for
1222 * us! We do one quick check first though
1223 */
1224 if (sk->sk_state != TCP_ESTABLISHED)
1225 return -ENOTCONN;
1226
1227 /* Now we can treat all alike */
1228 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1229 return er;
1230
1231 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1232
1233 skb_pull(skb, ROSE_MIN_LEN);
1234
1235 if (rose->qbitincl) {
1236 asmptr = skb_push(skb, 1);
1237 *asmptr = qbit;
1238 }
1239
badff6d0 1240 skb_reset_transport_header(skb);
1da177e4
LT		 1241 copied = skb->len;
1242
1243 if (copied > size) {
1244 copied = size;
1245 msg->msg_flags |= MSG_TRUNC;
1246 }
1247
1248 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1249
1250 if (srose != NULL) {
1251 srose->srose_family = AF_ROSE;
1252 srose->srose_addr = rose->dest_addr;
1253 srose->srose_call = rose->dest_call;
1254 srose->srose_ndigis = rose->dest_ndigis;
1255 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1256 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1257 for (n = 0 ; n < rose->dest_ndigis ; n++)
1258 full_srose->srose_digis[n] = rose->dest_digis[n];
1259 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1260 } else {
1261 if (rose->dest_ndigis >= 1) {
1262 srose->srose_ndigis = 1;
1263 srose->srose_digi = rose->dest_digis[0];
1264 }
1265 msg->msg_namelen = sizeof(struct sockaddr_rose);
1266 }
1267 }
1268
1269 skb_free_datagram(sk, skb);
1270
1271 return copied;
1272}
1273
1274
1275static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1276{
1277 struct sock *sk = sock->sk;
1278 struct rose_sock *rose = rose_sk(sk);
1279 void __user *argp = (void __user *)arg;
1280
1281 switch (cmd) {
1282 case TIOCOUTQ: {
1283 long amount;
1284 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1285 if (amount < 0)
1286 amount = 0;
20b7d10a 1287 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1288 }
1289
1290 case TIOCINQ: {
1291 struct sk_buff *skb;
1292 long amount = 0L;
1293 /* These two are safe on a single CPU system as only user tasks fiddle here */
1294 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1295 amount = skb->len;
20b7d10a 1296 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1297 }
1298
1299 case SIOCGSTAMP:
20b7d10a 1300 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1da177e4 1301
ae40eb1e
ED		 1302 case SIOCGSTAMPNS:
1303 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1304
1da177e4
LT		 1305 case SIOCGIFADDR:
1306 case SIOCSIFADDR:
1307 case SIOCGIFDSTADDR:
1308 case SIOCSIFDSTADDR:
1309 case SIOCGIFBRDADDR:
1310 case SIOCSIFBRDADDR:
1311 case SIOCGIFNETMASK:
1312 case SIOCSIFNETMASK:
1313 case SIOCGIFMETRIC:
1314 case SIOCSIFMETRIC:
1315 return -EINVAL;
1316
1317 case SIOCADDRT:
1318 case SIOCDELRT:
1319 case SIOCRSCLRRT:
1320 if (!capable(CAP_NET_ADMIN))
1321 return -EPERM;
1322 return rose_rt_ioctl(cmd, argp);
1323
1324 case SIOCRSGCAUSE: {
1325 struct rose_cause_struct rose_cause;
1326 rose_cause.cause = rose->cause;
1327 rose_cause.diagnostic = rose->diagnostic;
1328 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1329 }
1330
1331 case SIOCRSSCAUSE: {
1332 struct rose_cause_struct rose_cause;
1333 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1334 return -EFAULT;
1335 rose->cause = rose_cause.cause;
1336 rose->diagnostic = rose_cause.diagnostic;
1337 return 0;
1338 }
1339
1340 case SIOCRSSL2CALL:
1341 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1342 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1343 ax25_listen_release(&rose_callsign, NULL);
1344 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1345 return -EFAULT;
1346 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
81dcd169
RB		 1347 return ax25_listen_register(&rose_callsign, NULL);
1348
1da177e4
LT		 1349 return 0;
1350
1351 case SIOCRSGL2CALL:
1352 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1353
1354 case SIOCRSACCEPT:
1355 if (rose->state == ROSE_STATE_5) {
1356 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1357 rose_start_idletimer(sk);
1358 rose->condition = 0x00;
1359 rose->vs = 0;
1360 rose->va = 0;
1361 rose->vr = 0;
1362 rose->vl = 0;
1363 rose->state = ROSE_STATE_3;
1364 }
1365 return 0;
1366
1367 default:
b5e5fa5e 1368 return -ENOIOCTLCMD;
1da177e4
LT		 1369 }
1370
1371 return 0;
1372}
1373
1374#ifdef CONFIG_PROC_FS
1375static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1376{
1377 int i;
1378 struct sock *s;
1379 struct hlist_node *node;
1380
1381 spin_lock_bh(&rose_list_lock);
1382 if (*pos == 0)
1383 return SEQ_START_TOKEN;
3dcf7c5e 1384
1da177e4
LT		 1385 i = 1;
1386 sk_for_each(s, node, &rose_list) {
1387 if (i == *pos)
1388 return s;
1389 ++i;
1390 }
1391 return NULL;
1392}
1393
1394static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1395{
1396 ++*pos;
1397
3dcf7c5e 1398 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1da177e4
LT		 1399 : sk_next((struct sock *)v);
1400}
3dcf7c5e 1401
1da177e4
LT		 1402static void rose_info_stop(struct seq_file *seq, void *v)
1403{
1404 spin_unlock_bh(&rose_list_lock);
1405}
1406
1407static int rose_info_show(struct seq_file *seq, void *v)
1408{
f75268cd
RB		 1409 char buf[11];
1410
1da177e4 1411 if (v == SEQ_START_TOKEN)
3dcf7c5e 1412 seq_puts(seq,
1da177e4
LT		 1413 "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");
1414
1415 else {
1416 struct sock *s = v;
1417 struct rose_sock *rose = rose_sk(s);
1418 const char *devname, *callsign;
1419 const struct net_device *dev = rose->device;
1420
1421 if (!dev)
1422 devname = "???";
1423 else
1424 devname = dev->name;
3dcf7c5e 1425
1da177e4
LT		 1426 seq_printf(seq, "%-10s %-9s ",
1427 rose2asc(&rose->dest_addr),
f75268cd 1428 ax2asc(buf, &rose->dest_call));
1da177e4
LT		 1429
1430 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1431 callsign = "??????-?";
1432 else
f75268cd 1433 callsign = ax2asc(buf, &rose->source_call);
1da177e4
LT		 1434
1435 seq_printf(seq,
1436 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1437 rose2asc(&rose->source_addr),
1438 callsign,
1439 devname,
1440 rose->lci & 0x0FFF,
1441 (rose->neighbour) ? rose->neighbour->number : 0,
1442 rose->state,
1443 rose->vs,
1444 rose->vr,
1445 rose->va,
1446 ax25_display_timer(&rose->timer) / HZ,
1447 rose->t1 / HZ,
1448 rose->t2 / HZ,
1449 rose->t3 / HZ,
1450 rose->hb / HZ,
1451 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1452 rose->idle / (60 * HZ),
1453 atomic_read(&s->sk_wmem_alloc),
1454 atomic_read(&s->sk_rmem_alloc),
1455 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1456 }
1457
1458 return 0;
1459}
1460
56b3d975 1461static const struct seq_operations rose_info_seqops = {
1da177e4
LT		 1462 .start = rose_info_start,
1463 .next = rose_info_next,
1464 .stop = rose_info_stop,
1465 .show = rose_info_show,
1466};
1467
1468static int rose_info_open(struct inode *inode, struct file *file)
1469{
1470 return seq_open(file, &rose_info_seqops);
1471}
1472
da7071d7 1473static const struct file_operations rose_info_fops = {
1da177e4
LT		 1474 .owner = THIS_MODULE,
1475 .open = rose_info_open,
1476 .read = seq_read,
1477 .llseek = seq_lseek,
1478 .release = seq_release,
1479};
1480#endif /* CONFIG_PROC_FS */
1481
1482static struct net_proto_family rose_family_ops = {
1483 .family = PF_ROSE,
1484 .create = rose_create,
1485 .owner = THIS_MODULE,
1486};
1487
1488static struct proto_ops rose_proto_ops = {
1489 .family = PF_ROSE,
1490 .owner = THIS_MODULE,
1491 .release = rose_release,
1492 .bind = rose_bind,
1493 .connect = rose_connect,
1494 .socketpair = sock_no_socketpair,
1495 .accept = rose_accept,
1496 .getname = rose_getname,
1497 .poll = datagram_poll,
1498 .ioctl = rose_ioctl,
1499 .listen = rose_listen,
1500 .shutdown = sock_no_shutdown,
1501 .setsockopt = rose_setsockopt,
1502 .getsockopt = rose_getsockopt,
1503 .sendmsg = rose_sendmsg,
1504 .recvmsg = rose_recvmsg,
1505 .mmap = sock_no_mmap,
1506 .sendpage = sock_no_sendpage,
1507};
1508
1509static struct notifier_block rose_dev_notifier = {
1510 .notifier_call = rose_device_event,
1511};
1512
1513static struct net_device **dev_rose;
1514
8d5cf596
RB		 1515static struct ax25_protocol rose_pid = {
1516 .pid = AX25_P_ROSE,
1517 .func = rose_route_frame
1518};
1519
a4282717
RB		 1520static struct ax25_linkfail rose_linkfail_notifier = {
1521 .func = rose_link_failed
1522};
1523
1da177e4
LT		 1524static int __init rose_proto_init(void)
1525{
1526 int i;
a83cd2cc 1527 int rc;
1da177e4 1528
a83cd2cc
AD		 1529 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1530 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1531 rc = -EINVAL;
1532 goto out;
1533 }
1534
1535 rc = proto_register(&rose_proto, 0);
1da177e4
LT		 1536 if (rc != 0)
1537 goto out;
1538
1539 rose_callsign = null_ax25_address;
1540
1b30dd35 1541 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1da177e4
LT		 1542 if (dev_rose == NULL) {
1543 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
a83cd2cc
AD		 1544 rc = -ENOMEM;
1545 goto out_proto_unregister;
1da177e4
LT		 1546 }
1547
1da177e4
LT		 1548 for (i = 0; i < rose_ndevs; i++) {
1549 struct net_device *dev;
1550 char name[IFNAMSIZ];
1551
1552 sprintf(name, "rose%d", i);
3dcf7c5e 1553 dev = alloc_netdev(sizeof(struct net_device_stats),
1da177e4
LT		 1554 name, rose_setup);
1555 if (!dev) {
1556 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
70ff3b66 1557 rc = -ENOMEM;
1da177e4
LT		 1558 goto fail;
1559 }
70ff3b66
AD		 1560 rc = register_netdev(dev);
1561 if (rc) {
520d1b83 1562 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1da177e4
LT		 1563 free_netdev(dev);
1564 goto fail;
1565 }
b1d21ca8 1566 lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key);
1da177e4
LT		 1567 dev_rose[i] = dev;
1568 }
1569
1570 sock_register(&rose_family_ops);
1571 register_netdevice_notifier(&rose_dev_notifier);
1da177e4 1572
8d5cf596 1573 ax25_register_pid(&rose_pid);
a4282717 1574 ax25_linkfail_register(&rose_linkfail_notifier);
1da177e4
LT		 1575
1576#ifdef CONFIG_SYSCTL
1577 rose_register_sysctl();
1578#endif
1579 rose_loopback_init();
1580
1581 rose_add_loopback_neigh();
1582
457c4cbc
EB		 1583 proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1584 proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1585 proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1586 proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1da177e4
LT		 1587out:
1588 return rc;
1589fail:
1590 while (--i >= 0) {
1591 unregister_netdev(dev_rose[i]);
1592 free_netdev(dev_rose[i]);
1593 }
1594 kfree(dev_rose);
a83cd2cc 1595out_proto_unregister:
1da177e4 1596 proto_unregister(&rose_proto);
70ff3b66 1597 goto out;
1da177e4
LT		 1598}
1599module_init(rose_proto_init);
1600
1601module_param(rose_ndevs, int, 0);
1602MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1603
1604MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1605MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1606MODULE_LICENSE("GPL");
1607MODULE_ALIAS_NETPROTO(PF_ROSE);
1608
1609static void __exit rose_exit(void)
1610{
1611 int i;
1612
457c4cbc
EB		 1613 proc_net_remove(&init_net, "rose");
1614 proc_net_remove(&init_net, "rose_neigh");
1615 proc_net_remove(&init_net, "rose_nodes");
1616 proc_net_remove(&init_net, "rose_routes");
1da177e4
LT		 1617 rose_loopback_clear();
1618
1619 rose_rt_free();
1620
1621 ax25_protocol_release(AX25_P_ROSE);
a4282717 1622 ax25_linkfail_release(&rose_linkfail_notifier);
1da177e4
LT		 1623
1624 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1625 ax25_listen_release(&rose_callsign, NULL);
1626
1627#ifdef CONFIG_SYSCTL
1628 rose_unregister_sysctl();
1629#endif
1630 unregister_netdevice_notifier(&rose_dev_notifier);
1631
1632 sock_unregister(PF_ROSE);
1633
1634 for (i = 0; i < rose_ndevs; i++) {
1635 struct net_device *dev = dev_rose[i];
1636
1637 if (dev) {
1638 unregister_netdev(dev);
1639 free_netdev(dev);
1640 }
1641 }
1642
1643 kfree(dev_rose);
1644 proto_unregister(&rose_proto);
1645}
1646
1647module_exit(rose_exit);
Linux 6.x block layer and io_uring tree(s)