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atm: [fore200e] convert to use request_firmware()
[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{
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;
1da177e4
LT		 569 sk->sk_priority = osk->sk_priority;
570 sk->sk_protocol = osk->sk_protocol;
571 sk->sk_rcvbuf = osk->sk_rcvbuf;
572 sk->sk_sndbuf = osk->sk_sndbuf;
573 sk->sk_state = TCP_ESTABLISHED;
53b924b3 574 sock_copy_flags(sk, osk);
1da177e4
LT		 575
576 init_timer(&rose->timer);
577 init_timer(&rose->idletimer);
578
579 orose = rose_sk(osk);
580 rose->t1 = orose->t1;
581 rose->t2 = orose->t2;
582 rose->t3 = orose->t3;
583 rose->hb = orose->hb;
584 rose->idle = orose->idle;
585 rose->defer = orose->defer;
586 rose->device = orose->device;
587 rose->qbitincl = orose->qbitincl;
588
589 return sk;
590}
591
592static int rose_release(struct socket *sock)
593{
594 struct sock *sk = sock->sk;
595 struct rose_sock *rose;
596
597 if (sk == NULL) return 0;
598
4965291a
JP		 599 sock_hold(sk);
600 sock_orphan(sk);
601 lock_sock(sk);
1da177e4
LT		 602 rose = rose_sk(sk);
603
604 switch (rose->state) {
605 case ROSE_STATE_0:
4965291a 606 release_sock(sk);
1da177e4 607 rose_disconnect(sk, 0, -1, -1);
4965291a 608 lock_sock(sk);
1da177e4
LT		 609 rose_destroy_socket(sk);
610 break;
611
612 case ROSE_STATE_2:
613 rose->neighbour->use--;
4965291a 614 release_sock(sk);
1da177e4 615 rose_disconnect(sk, 0, -1, -1);
4965291a 616 lock_sock(sk);
1da177e4
LT		 617 rose_destroy_socket(sk);
618 break;
619
620 case ROSE_STATE_1:
621 case ROSE_STATE_3:
622 case ROSE_STATE_4:
623 case ROSE_STATE_5:
624 rose_clear_queues(sk);
625 rose_stop_idletimer(sk);
626 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
627 rose_start_t3timer(sk);
628 rose->state = ROSE_STATE_2;
629 sk->sk_state = TCP_CLOSE;
630 sk->sk_shutdown |= SEND_SHUTDOWN;
631 sk->sk_state_change(sk);
632 sock_set_flag(sk, SOCK_DEAD);
633 sock_set_flag(sk, SOCK_DESTROY);
634 break;
635
636 default:
637 break;
638 }
639
640 sock->sk = NULL;
4965291a
JP		 641 release_sock(sk);
642 sock_put(sk);
1da177e4
LT		 643
644 return 0;
645}
646
647static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
648{
649 struct sock *sk = sock->sk;
650 struct rose_sock *rose = rose_sk(sk);
651 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
652 struct net_device *dev;
01d7dd0e
RB		 653 ax25_address *source;
654 ax25_uid_assoc *user;
1da177e4
LT		 655 int n;
656
657 if (!sock_flag(sk, SOCK_ZAPPED))
658 return -EINVAL;
659
660 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
661 return -EINVAL;
662
663 if (addr->srose_family != AF_ROSE)
664 return -EINVAL;
665
666 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
667 return -EINVAL;
668
669 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
670 return -EINVAL;
671
672 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
673 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
674 return -EADDRNOTAVAIL;
675 }
676
677 source = &addr->srose_call;
678
01d7dd0e
RB		 679 user = ax25_findbyuid(current->euid);
680 if (user) {
681 rose->source_call = user->call;
682 ax25_uid_put(user);
683 } else {
1da177e4
LT		 684 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
685 return -EACCES;
01d7dd0e 686 rose->source_call = *source;
1da177e4
LT		 687 }
688
689 rose->source_addr = addr->srose_addr;
1da177e4
LT		 690 rose->device = dev;
691 rose->source_ndigis = addr->srose_ndigis;
692
693 if (addr_len == sizeof(struct full_sockaddr_rose)) {
694 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
695 for (n = 0 ; n < addr->srose_ndigis ; n++)
696 rose->source_digis[n] = full_addr->srose_digis[n];
697 } else {
698 if (rose->source_ndigis == 1) {
699 rose->source_digis[0] = addr->srose_digi;
700 }
701 }
702
703 rose_insert_socket(sk);
704
705 sock_reset_flag(sk, SOCK_ZAPPED);
706 SOCK_DEBUG(sk, "ROSE: socket is bound\n");
707 return 0;
708}
709
710static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
711{
712 struct sock *sk = sock->sk;
713 struct rose_sock *rose = rose_sk(sk);
714 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
715 unsigned char cause, diagnostic;
1da177e4 716 struct net_device *dev;
01d7dd0e 717 ax25_uid_assoc *user;
2536b94a 718 int n, err = 0;
1da177e4
LT		 719
720 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
721 return -EINVAL;
722
723 if (addr->srose_family != AF_ROSE)
724 return -EINVAL;
725
726 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
727 return -EINVAL;
728
729 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
730 return -EINVAL;
731
732 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
733 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
734 return -EINVAL;
735
2536b94a
RB		 736 lock_sock(sk);
737
738 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
739 /* Connect completed during a ERESTARTSYS event */
740 sock->state = SS_CONNECTED;
741 goto out_release;
742 }
743
744 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
745 sock->state = SS_UNCONNECTED;
746 err = -ECONNREFUSED;
747 goto out_release;
748 }
749
750 if (sk->sk_state == TCP_ESTABLISHED) {
751 /* No reconnect on a seqpacket socket */
752 err = -EISCONN;
753 goto out_release;
754 }
755
756 sk->sk_state = TCP_CLOSE;
757 sock->state = SS_UNCONNECTED;
758
1da177e4
LT		 759 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
760 &diagnostic);
43837b1e
BP		 761 if (!rose->neighbour) {
762 err = -ENETUNREACH;
763 goto out_release;
764 }
1da177e4
LT		 765
766 rose->lci = rose_new_lci(rose->neighbour);
2536b94a
RB		 767 if (!rose->lci) {
768 err = -ENETUNREACH;
769 goto out_release;
770 }
1da177e4
LT		 771
772 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
773 sock_reset_flag(sk, SOCK_ZAPPED);
774
2536b94a
RB		 775 if ((dev = rose_dev_first()) == NULL) {
776 err = -ENETUNREACH;
777 goto out_release;
778 }
1da177e4 779
01d7dd0e 780 user = ax25_findbyuid(current->euid);
2536b94a
RB		 781 if (!user) {
782 err = -EINVAL;
783 goto out_release;
784 }
1da177e4
LT		 785
786 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
01d7dd0e 787 rose->source_call = user->call;
1da177e4 788 rose->device = dev;
01d7dd0e 789 ax25_uid_put(user);
1da177e4
LT		 790
791 rose_insert_socket(sk); /* Finish the bind */
792 }
d85838c5 793rose_try_next_neigh:
1da177e4
LT		 794 rose->dest_addr = addr->srose_addr;
795 rose->dest_call = addr->srose_call;
796 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
797 rose->dest_ndigis = addr->srose_ndigis;
798
799 if (addr_len == sizeof(struct full_sockaddr_rose)) {
800 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
801 for (n = 0 ; n < addr->srose_ndigis ; n++)
802 rose->dest_digis[n] = full_addr->srose_digis[n];
803 } else {
804 if (rose->dest_ndigis == 1) {
805 rose->dest_digis[0] = addr->srose_digi;
806 }
807 }
808
809 /* Move to connecting socket, start sending Connect Requests */
810 sock->state = SS_CONNECTING;
811 sk->sk_state = TCP_SYN_SENT;
812
813 rose->state = ROSE_STATE_1;
814
815 rose->neighbour->use++;
816
817 rose_write_internal(sk, ROSE_CALL_REQUEST);
818 rose_start_heartbeat(sk);
819 rose_start_t1timer(sk);
820
821 /* Now the loop */
2536b94a
RB		 822 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
823 err = -EINPROGRESS;
824 goto out_release;
825 }
1da177e4
LT		 826
827 /*
828 * A Connect Ack with Choke or timeout or failed routing will go to
829 * closed.
830 */
831 if (sk->sk_state == TCP_SYN_SENT) {
75606dc6 832 DEFINE_WAIT(wait);
1da177e4 833
1da177e4 834 for (;;) {
75606dc6 835 prepare_to_wait(sk->sk_sleep, &wait,
6140efb5 836 TASK_INTERRUPTIBLE);
1da177e4
LT		 837 if (sk->sk_state != TCP_SYN_SENT)
838 break;
75606dc6
RB		 839 if (!signal_pending(current)) {
840 release_sock(sk);
1da177e4 841 schedule();
2536b94a 842 lock_sock(sk);
1da177e4
LT		 843 continue;
844 }
75606dc6
RB		 845 err = -ERESTARTSYS;
846 break;
1da177e4 847 }
75606dc6
RB		 848 finish_wait(sk->sk_sleep, &wait);
849
850 if (err)
851 goto out_release;
1da177e4
LT		 852 }
853
854 if (sk->sk_state != TCP_ESTABLISHED) {
d85838c5
RB		 855 /* Try next neighbour */
856 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic);
857 if (rose->neighbour)
858 goto rose_try_next_neigh;
2536b94a
RB		 859
860 /* No more neighbours */
1da177e4 861 sock->state = SS_UNCONNECTED;
2536b94a
RB		 862 err = sock_error(sk); /* Always set at this point */
863 goto out_release;
1da177e4
LT		 864 }
865
866 sock->state = SS_CONNECTED;
867
2536b94a
RB		 868out_release:
869 release_sock(sk);
870
871 return err;
1da177e4
LT		 872}
873
874static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
875{
1da177e4
LT		 876 struct sk_buff *skb;
877 struct sock *newsk;
75606dc6 878 DEFINE_WAIT(wait);
1da177e4
LT		 879 struct sock *sk;
880 int err = 0;
881
882 if ((sk = sock->sk) == NULL)
883 return -EINVAL;
884
885 lock_sock(sk);
886 if (sk->sk_type != SOCK_SEQPACKET) {
887 err = -EOPNOTSUPP;
75606dc6 888 goto out_release;
1da177e4
LT		 889 }
890
891 if (sk->sk_state != TCP_LISTEN) {
892 err = -EINVAL;
75606dc6 893 goto out_release;
1da177e4
LT		 894 }
895
896 /*
897 * The write queue this time is holding sockets ready to use
898 * hooked into the SABM we saved
899 */
1da177e4 900 for (;;) {
75606dc6
RB		 901 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
902
1da177e4
LT		 903 skb = skb_dequeue(&sk->sk_receive_queue);
904 if (skb)
905 break;
906
1da177e4 907 if (flags & O_NONBLOCK) {
75606dc6
RB		 908 err = -EWOULDBLOCK;
909 break;
1da177e4 910 }
75606dc6
RB		 911 if (!signal_pending(current)) {
912 release_sock(sk);
1da177e4
LT		 913 schedule();
914 lock_sock(sk);
915 continue;
916 }
75606dc6
RB		 917 err = -ERESTARTSYS;
918 break;
1da177e4 919 }
75606dc6
RB		 920 finish_wait(sk->sk_sleep, &wait);
921 if (err)
922 goto out_release;
1da177e4
LT		 923
924 newsk = skb->sk;
44ccff1f 925 sock_graft(newsk, newsock);
1da177e4
LT		 926
927 /* Now attach up the new socket */
928 skb->sk = NULL;
929 kfree_skb(skb);
930 sk->sk_ack_backlog--;
1da177e4 931
75606dc6 932out_release:
1da177e4
LT		 933 release_sock(sk);
934
935 return err;
936}
937
938static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
939 int *uaddr_len, int peer)
940{
941 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
942 struct sock *sk = sock->sk;
943 struct rose_sock *rose = rose_sk(sk);
944 int n;
945
946 if (peer != 0) {
947 if (sk->sk_state != TCP_ESTABLISHED)
948 return -ENOTCONN;
949 srose->srose_family = AF_ROSE;
950 srose->srose_addr = rose->dest_addr;
951 srose->srose_call = rose->dest_call;
952 srose->srose_ndigis = rose->dest_ndigis;
953 for (n = 0; n < rose->dest_ndigis; n++)
954 srose->srose_digis[n] = rose->dest_digis[n];
955 } else {
956 srose->srose_family = AF_ROSE;
957 srose->srose_addr = rose->source_addr;
958 srose->srose_call = rose->source_call;
959 srose->srose_ndigis = rose->source_ndigis;
960 for (n = 0; n < rose->source_ndigis; n++)
961 srose->srose_digis[n] = rose->source_digis[n];
962 }
963
964 *uaddr_len = sizeof(struct full_sockaddr_rose);
965 return 0;
966}
967
968int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
969{
970 struct sock *sk;
971 struct sock *make;
972 struct rose_sock *make_rose;
973 struct rose_facilities_struct facilities;
974 int n, len;
975
976 skb->sk = NULL; /* Initially we don't know who it's for */
977
978 /*
979 * skb->data points to the rose frame start
980 */
981 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
982
95b7d924
ED		 983 len = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
984 len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
1da177e4
LT		 985 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
986 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
987 return 0;
988 }
989
990 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
991
992 /*
993 * We can't accept the Call Request.
994 */
995 if (sk == NULL || sk_acceptq_is_full(sk) ||
996 (make = rose_make_new(sk)) == NULL) {
997 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
998 return 0;
999 }
1000
1001 skb->sk = make;
1002 make->sk_state = TCP_ESTABLISHED;
1003 make_rose = rose_sk(make);
1004
1005 make_rose->lci = lci;
1006 make_rose->dest_addr = facilities.dest_addr;
1007 make_rose->dest_call = facilities.dest_call;
1008 make_rose->dest_ndigis = facilities.dest_ndigis;
1009 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1010 make_rose->dest_digis[n] = facilities.dest_digis[n];
1011 make_rose->source_addr = facilities.source_addr;
1012 make_rose->source_call = facilities.source_call;
1013 make_rose->source_ndigis = facilities.source_ndigis;
1014 for (n = 0 ; n < facilities.source_ndigis ; n++)
1015 make_rose->source_digis[n]= facilities.source_digis[n];
1016 make_rose->neighbour = neigh;
1017 make_rose->device = dev;
1018 make_rose->facilities = facilities;
1019
1020 make_rose->neighbour->use++;
1021
1022 if (rose_sk(sk)->defer) {
1023 make_rose->state = ROSE_STATE_5;
1024 } else {
1025 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1026 make_rose->state = ROSE_STATE_3;
1027 rose_start_idletimer(make);
1028 }
1029
1030 make_rose->condition = 0x00;
1031 make_rose->vs = 0;
1032 make_rose->va = 0;
1033 make_rose->vr = 0;
1034 make_rose->vl = 0;
1035 sk->sk_ack_backlog++;
1036
1037 rose_insert_socket(make);
1038
1039 skb_queue_head(&sk->sk_receive_queue, skb);
1040
1041 rose_start_heartbeat(make);
1042
1043 if (!sock_flag(sk, SOCK_DEAD))
1044 sk->sk_data_ready(sk, skb->len);
1045
1046 return 1;
1047}
1048
1049static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1050 struct msghdr *msg, size_t len)
1051{
1052 struct sock *sk = sock->sk;
1053 struct rose_sock *rose = rose_sk(sk);
1054 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1055 int err;
1056 struct full_sockaddr_rose srose;
1057 struct sk_buff *skb;
1058 unsigned char *asmptr;
1059 int n, size, qbit = 0;
1060
1061 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1062 return -EINVAL;
1063
1064 if (sock_flag(sk, SOCK_ZAPPED))
1065 return -EADDRNOTAVAIL;
1066
1067 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1068 send_sig(SIGPIPE, current, 0);
1069 return -EPIPE;
1070 }
1071
1072 if (rose->neighbour == NULL || rose->device == NULL)
1073 return -ENETUNREACH;
1074
1075 if (usrose != NULL) {
1076 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1077 return -EINVAL;
1078 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1079 memcpy(&srose, usrose, msg->msg_namelen);
1080 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1081 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1082 return -EISCONN;
1083 if (srose.srose_ndigis != rose->dest_ndigis)
1084 return -EISCONN;
1085 if (srose.srose_ndigis == rose->dest_ndigis) {
1086 for (n = 0 ; n < srose.srose_ndigis ; n++)
1087 if (ax25cmp(&rose->dest_digis[n],
1088 &srose.srose_digis[n]))
1089 return -EISCONN;
1090 }
1091 if (srose.srose_family != AF_ROSE)
1092 return -EINVAL;
1093 } else {
1094 if (sk->sk_state != TCP_ESTABLISHED)
1095 return -ENOTCONN;
1096
1097 srose.srose_family = AF_ROSE;
1098 srose.srose_addr = rose->dest_addr;
1099 srose.srose_call = rose->dest_call;
1100 srose.srose_ndigis = rose->dest_ndigis;
1101 for (n = 0 ; n < rose->dest_ndigis ; n++)
1102 srose.srose_digis[n] = rose->dest_digis[n];
1103 }
1104
1105 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1106
1107 /* Build a packet */
1108 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1109 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1110
1111 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1112 return err;
1113
1114 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1115
1116 /*
1117 * Put the data on the end
1118 */
1119 SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1120
eeeb0374
ACM		 1121 skb_reset_transport_header(skb);
1122 skb_put(skb, len);
1da177e4 1123
eeeb0374 1124 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1da177e4
LT		 1125 if (err) {
1126 kfree_skb(skb);
1127 return err;
1128 }
1129
1130 /*
1131 * If the Q BIT Include socket option is in force, the first
1132 * byte of the user data is the logical value of the Q Bit.
1133 */
1134 if (rose->qbitincl) {
1135 qbit = skb->data[0];
1136 skb_pull(skb, 1);
1137 }
1138
1139 /*
1140 * Push down the ROSE header
1141 */
1142 asmptr = skb_push(skb, ROSE_MIN_LEN);
1143
1144 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1145
1146 /* Build a ROSE Network header */
1147 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1148 asmptr[1] = (rose->lci >> 0) & 0xFF;
1149 asmptr[2] = ROSE_DATA;
1150
1151 if (qbit)
1152 asmptr[0] |= ROSE_Q_BIT;
1153
1154 SOCK_DEBUG(sk, "ROSE: Built header.\n");
1155
1156 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1157
1158 if (sk->sk_state != TCP_ESTABLISHED) {
1159 kfree_skb(skb);
1160 return -ENOTCONN;
1161 }
1162
1163#ifdef M_BIT
1164#define ROSE_PACLEN (256-ROSE_MIN_LEN)
1165 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1166 unsigned char header[ROSE_MIN_LEN];
1167 struct sk_buff *skbn;
1168 int frontlen;
1169 int lg;
1170
1171 /* Save a copy of the Header */
d626f62b 1172 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1da177e4
LT		 1173 skb_pull(skb, ROSE_MIN_LEN);
1174
1175 frontlen = skb_headroom(skb);
1176
1177 while (skb->len > 0) {
1178 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1179 kfree_skb(skb);
1180 return err;
1181 }
1182
1183 skbn->sk = sk;
1184 skbn->free = 1;
1185 skbn->arp = 1;
1186
1187 skb_reserve(skbn, frontlen);
1188
1189 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1190
1191 /* Copy the user data */
d626f62b 1192 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1da177e4
LT		 1193 skb_pull(skb, lg);
1194
1195 /* Duplicate the Header */
1196 skb_push(skbn, ROSE_MIN_LEN);
27d7ff46 1197 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1da177e4
LT		 1198
1199 if (skb->len > 0)
1200 skbn->data[2] |= M_BIT;
1201
1202 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1203 }
1204
1205 skb->free = 1;
1206 kfree_skb(skb);
1207 } else {
1208 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1209 }
1210#else
1211 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1212#endif
1213
1214 rose_kick(sk);
1215
1216 return len;
1217}
1218
1219
1220static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1221 struct msghdr *msg, size_t size, int flags)
1222{
1223 struct sock *sk = sock->sk;
1224 struct rose_sock *rose = rose_sk(sk);
1225 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1226 size_t copied;
1227 unsigned char *asmptr;
1228 struct sk_buff *skb;
1229 int n, er, qbit;
1230
1231 /*
1232 * This works for seqpacket too. The receiver has ordered the queue for
1233 * us! We do one quick check first though
1234 */
1235 if (sk->sk_state != TCP_ESTABLISHED)
1236 return -ENOTCONN;
1237
1238 /* Now we can treat all alike */
1239 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1240 return er;
1241
1242 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1243
1244 skb_pull(skb, ROSE_MIN_LEN);
1245
1246 if (rose->qbitincl) {
1247 asmptr = skb_push(skb, 1);
1248 *asmptr = qbit;
1249 }
1250
badff6d0 1251 skb_reset_transport_header(skb);
1da177e4
LT		 1252 copied = skb->len;
1253
1254 if (copied > size) {
1255 copied = size;
1256 msg->msg_flags |= MSG_TRUNC;
1257 }
1258
1259 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1260
1261 if (srose != NULL) {
1262 srose->srose_family = AF_ROSE;
1263 srose->srose_addr = rose->dest_addr;
1264 srose->srose_call = rose->dest_call;
1265 srose->srose_ndigis = rose->dest_ndigis;
1266 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1267 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1268 for (n = 0 ; n < rose->dest_ndigis ; n++)
1269 full_srose->srose_digis[n] = rose->dest_digis[n];
1270 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1271 } else {
1272 if (rose->dest_ndigis >= 1) {
1273 srose->srose_ndigis = 1;
1274 srose->srose_digi = rose->dest_digis[0];
1275 }
1276 msg->msg_namelen = sizeof(struct sockaddr_rose);
1277 }
1278 }
1279
1280 skb_free_datagram(sk, skb);
1281
1282 return copied;
1283}
1284
1285
1286static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1287{
1288 struct sock *sk = sock->sk;
1289 struct rose_sock *rose = rose_sk(sk);
1290 void __user *argp = (void __user *)arg;
1291
1292 switch (cmd) {
1293 case TIOCOUTQ: {
1294 long amount;
1295 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1296 if (amount < 0)
1297 amount = 0;
20b7d10a 1298 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1299 }
1300
1301 case TIOCINQ: {
1302 struct sk_buff *skb;
1303 long amount = 0L;
1304 /* These two are safe on a single CPU system as only user tasks fiddle here */
1305 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1306 amount = skb->len;
20b7d10a 1307 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1308 }
1309
1310 case SIOCGSTAMP:
20b7d10a 1311 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1da177e4 1312
ae40eb1e
ED		 1313 case SIOCGSTAMPNS:
1314 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1315
1da177e4
LT		 1316 case SIOCGIFADDR:
1317 case SIOCSIFADDR:
1318 case SIOCGIFDSTADDR:
1319 case SIOCSIFDSTADDR:
1320 case SIOCGIFBRDADDR:
1321 case SIOCSIFBRDADDR:
1322 case SIOCGIFNETMASK:
1323 case SIOCSIFNETMASK:
1324 case SIOCGIFMETRIC:
1325 case SIOCSIFMETRIC:
1326 return -EINVAL;
1327
1328 case SIOCADDRT:
1329 case SIOCDELRT:
1330 case SIOCRSCLRRT:
1331 if (!capable(CAP_NET_ADMIN))
1332 return -EPERM;
1333 return rose_rt_ioctl(cmd, argp);
1334
1335 case SIOCRSGCAUSE: {
1336 struct rose_cause_struct rose_cause;
1337 rose_cause.cause = rose->cause;
1338 rose_cause.diagnostic = rose->diagnostic;
1339 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1340 }
1341
1342 case SIOCRSSCAUSE: {
1343 struct rose_cause_struct rose_cause;
1344 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1345 return -EFAULT;
1346 rose->cause = rose_cause.cause;
1347 rose->diagnostic = rose_cause.diagnostic;
1348 return 0;
1349 }
1350
1351 case SIOCRSSL2CALL:
1352 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1353 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1354 ax25_listen_release(&rose_callsign, NULL);
1355 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1356 return -EFAULT;
1357 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
81dcd169
RB		 1358 return ax25_listen_register(&rose_callsign, NULL);
1359
1da177e4
LT		 1360 return 0;
1361
1362 case SIOCRSGL2CALL:
1363 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1364
1365 case SIOCRSACCEPT:
1366 if (rose->state == ROSE_STATE_5) {
1367 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1368 rose_start_idletimer(sk);
1369 rose->condition = 0x00;
1370 rose->vs = 0;
1371 rose->va = 0;
1372 rose->vr = 0;
1373 rose->vl = 0;
1374 rose->state = ROSE_STATE_3;
1375 }
1376 return 0;
1377
1378 default:
b5e5fa5e 1379 return -ENOIOCTLCMD;
1da177e4
LT		 1380 }
1381
1382 return 0;
1383}
1384
1385#ifdef CONFIG_PROC_FS
1386static void *rose_info_start(struct seq_file *seq, loff_t *pos)
95b7d924 1387 __acquires(rose_list_lock)
1da177e4
LT		 1388{
1389 int i;
1390 struct sock *s;
1391 struct hlist_node *node;
1392
1393 spin_lock_bh(&rose_list_lock);
1394 if (*pos == 0)
1395 return SEQ_START_TOKEN;
3dcf7c5e 1396
1da177e4
LT		 1397 i = 1;
1398 sk_for_each(s, node, &rose_list) {
1399 if (i == *pos)
1400 return s;
1401 ++i;
1402 }
1403 return NULL;
1404}
1405
1406static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1407{
1408 ++*pos;
1409
3dcf7c5e 1410 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1da177e4
LT		 1411 : sk_next((struct sock *)v);
1412}
3dcf7c5e 1413
1da177e4 1414static void rose_info_stop(struct seq_file *seq, void *v)
95b7d924 1415 __releases(rose_list_lock)
1da177e4
LT		 1416{
1417 spin_unlock_bh(&rose_list_lock);
1418}
1419
1420static int rose_info_show(struct seq_file *seq, void *v)
1421{
f75268cd
RB		 1422 char buf[11];
1423
1da177e4 1424 if (v == SEQ_START_TOKEN)
3dcf7c5e 1425 seq_puts(seq,
1da177e4
LT		 1426 "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");
1427
1428 else {
1429 struct sock *s = v;
1430 struct rose_sock *rose = rose_sk(s);
1431 const char *devname, *callsign;
1432 const struct net_device *dev = rose->device;
1433
1434 if (!dev)
1435 devname = "???";
1436 else
1437 devname = dev->name;
3dcf7c5e 1438
1da177e4
LT		 1439 seq_printf(seq, "%-10s %-9s ",
1440 rose2asc(&rose->dest_addr),
f75268cd 1441 ax2asc(buf, &rose->dest_call));
1da177e4
LT		 1442
1443 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1444 callsign = "??????-?";
1445 else
f75268cd 1446 callsign = ax2asc(buf, &rose->source_call);
1da177e4
LT		 1447
1448 seq_printf(seq,
1449 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1450 rose2asc(&rose->source_addr),
1451 callsign,
1452 devname,
1453 rose->lci & 0x0FFF,
1454 (rose->neighbour) ? rose->neighbour->number : 0,
1455 rose->state,
1456 rose->vs,
1457 rose->vr,
1458 rose->va,
1459 ax25_display_timer(&rose->timer) / HZ,
1460 rose->t1 / HZ,
1461 rose->t2 / HZ,
1462 rose->t3 / HZ,
1463 rose->hb / HZ,
1464 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1465 rose->idle / (60 * HZ),
1466 atomic_read(&s->sk_wmem_alloc),
1467 atomic_read(&s->sk_rmem_alloc),
1468 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1469 }
1470
1471 return 0;
1472}
1473
56b3d975 1474static const struct seq_operations rose_info_seqops = {
1da177e4
LT		 1475 .start = rose_info_start,
1476 .next = rose_info_next,
1477 .stop = rose_info_stop,
1478 .show = rose_info_show,
1479};
1480
1481static int rose_info_open(struct inode *inode, struct file *file)
1482{
1483 return seq_open(file, &rose_info_seqops);
1484}
1485
da7071d7 1486static const struct file_operations rose_info_fops = {
1da177e4
LT		 1487 .owner = THIS_MODULE,
1488 .open = rose_info_open,
1489 .read = seq_read,
1490 .llseek = seq_lseek,
1491 .release = seq_release,
1492};
1493#endif /* CONFIG_PROC_FS */
1494
1495static struct net_proto_family rose_family_ops = {
1496 .family = PF_ROSE,
1497 .create = rose_create,
1498 .owner = THIS_MODULE,
1499};
1500
1501static struct proto_ops rose_proto_ops = {
1502 .family = PF_ROSE,
1503 .owner = THIS_MODULE,
1504 .release = rose_release,
1505 .bind = rose_bind,
1506 .connect = rose_connect,
1507 .socketpair = sock_no_socketpair,
1508 .accept = rose_accept,
1509 .getname = rose_getname,
1510 .poll = datagram_poll,
1511 .ioctl = rose_ioctl,
1512 .listen = rose_listen,
1513 .shutdown = sock_no_shutdown,
1514 .setsockopt = rose_setsockopt,
1515 .getsockopt = rose_getsockopt,
1516 .sendmsg = rose_sendmsg,
1517 .recvmsg = rose_recvmsg,
1518 .mmap = sock_no_mmap,
1519 .sendpage = sock_no_sendpage,
1520};
1521
1522static struct notifier_block rose_dev_notifier = {
1523 .notifier_call = rose_device_event,
1524};
1525
1526static struct net_device **dev_rose;
1527
8d5cf596
RB		 1528static struct ax25_protocol rose_pid = {
1529 .pid = AX25_P_ROSE,
1530 .func = rose_route_frame
1531};
1532
a4282717
RB		 1533static struct ax25_linkfail rose_linkfail_notifier = {
1534 .func = rose_link_failed
1535};
1536
1da177e4
LT		 1537static int __init rose_proto_init(void)
1538{
1539 int i;
a83cd2cc 1540 int rc;
1da177e4 1541
a83cd2cc
AD		 1542 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1543 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1544 rc = -EINVAL;
1545 goto out;
1546 }
1547
1548 rc = proto_register(&rose_proto, 0);
1da177e4
LT		 1549 if (rc != 0)
1550 goto out;
1551
1552 rose_callsign = null_ax25_address;
1553
1b30dd35 1554 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1da177e4
LT		 1555 if (dev_rose == NULL) {
1556 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
a83cd2cc
AD		 1557 rc = -ENOMEM;
1558 goto out_proto_unregister;
1da177e4
LT		 1559 }
1560
1da177e4
LT		 1561 for (i = 0; i < rose_ndevs; i++) {
1562 struct net_device *dev;
1563 char name[IFNAMSIZ];
1564
1565 sprintf(name, "rose%d", i);
3dcf7c5e 1566 dev = alloc_netdev(sizeof(struct net_device_stats),
1da177e4
LT		 1567 name, rose_setup);
1568 if (!dev) {
1569 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
70ff3b66 1570 rc = -ENOMEM;
1da177e4
LT		 1571 goto fail;
1572 }
70ff3b66
AD		 1573 rc = register_netdev(dev);
1574 if (rc) {
520d1b83 1575 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1da177e4
LT		 1576 free_netdev(dev);
1577 goto fail;
1578 }
b1d21ca8 1579 lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key);
1da177e4
LT		 1580 dev_rose[i] = dev;
1581 }
1582
1583 sock_register(&rose_family_ops);
1584 register_netdevice_notifier(&rose_dev_notifier);
1da177e4 1585
8d5cf596 1586 ax25_register_pid(&rose_pid);
a4282717 1587 ax25_linkfail_register(&rose_linkfail_notifier);
1da177e4
LT		 1588
1589#ifdef CONFIG_SYSCTL
1590 rose_register_sysctl();
1591#endif
1592 rose_loopback_init();
1593
1594 rose_add_loopback_neigh();
1595
457c4cbc
EB		 1596 proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1597 proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1598 proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1599 proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1da177e4
LT		 1600out:
1601 return rc;
1602fail:
1603 while (--i >= 0) {
1604 unregister_netdev(dev_rose[i]);
1605 free_netdev(dev_rose[i]);
1606 }
1607 kfree(dev_rose);
a83cd2cc 1608out_proto_unregister:
1da177e4 1609 proto_unregister(&rose_proto);
70ff3b66 1610 goto out;
1da177e4
LT		 1611}
1612module_init(rose_proto_init);
1613
1614module_param(rose_ndevs, int, 0);
1615MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1616
1617MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1618MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1619MODULE_LICENSE("GPL");
1620MODULE_ALIAS_NETPROTO(PF_ROSE);
1621
1622static void __exit rose_exit(void)
1623{
1624 int i;
1625
457c4cbc
EB		 1626 proc_net_remove(&init_net, "rose");
1627 proc_net_remove(&init_net, "rose_neigh");
1628 proc_net_remove(&init_net, "rose_nodes");
1629 proc_net_remove(&init_net, "rose_routes");
1da177e4
LT		 1630 rose_loopback_clear();
1631
1632 rose_rt_free();
1633
1634 ax25_protocol_release(AX25_P_ROSE);
a4282717 1635 ax25_linkfail_release(&rose_linkfail_notifier);
1da177e4
LT		 1636
1637 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1638 ax25_listen_release(&rose_callsign, NULL);
1639
1640#ifdef CONFIG_SYSCTL
1641 rose_unregister_sysctl();
1642#endif
1643 unregister_netdevice_notifier(&rose_dev_notifier);
1644
1645 sock_unregister(PF_ROSE);
1646
1647 for (i = 0; i < rose_ndevs; i++) {
1648 struct net_device *dev = dev_rose[i];
1649
1650 if (dev) {
1651 unregister_netdev(dev);
1652 free_netdev(dev);
1653 }
1654 }
1655
1656 kfree(dev_rose);
1657 proto_unregister(&rose_proto);
1658}
1659
1660module_exit(rose_exit);
Linux 6.x block layer and io_uring tree(s)