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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;
cf508b12 77static struct lock_class_key rose_netdev_addr_lock_key;
b1d21ca8 78
e8a0464c
DM		 79static void rose_set_lockdep_one(struct net_device *dev,
80 struct netdev_queue *txq,
81 void *_unused)
c773e847
DM		 82{
83 lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
84}
85
86static void rose_set_lockdep_key(struct net_device *dev)
87{
cf508b12 88 lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
e8a0464c 89 netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
c773e847
DM		 90}
91
1da177e4
LT		 92/*
93 * Convert a ROSE address into text.
94 */
95const char *rose2asc(const rose_address *addr)
96{
97 static char buffer[11];
98
99 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
100 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
101 addr->rose_addr[4] == 0x00) {
102 strcpy(buffer, "*");
103 } else {
104 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
105 addr->rose_addr[1] & 0xFF,
106 addr->rose_addr[2] & 0xFF,
107 addr->rose_addr[3] & 0xFF,
108 addr->rose_addr[4] & 0xFF);
109 }
110
111 return buffer;
112}
113
114/*
115 * Compare two ROSE addresses, 0 == equal.
116 */
117int rosecmp(rose_address *addr1, rose_address *addr2)
118{
119 int i;
120
121 for (i = 0; i < 5; i++)
122 if (addr1->rose_addr[i] != addr2->rose_addr[i])
123 return 1;
124
125 return 0;
126}
127
128/*
129 * Compare two ROSE addresses for only mask digits, 0 == equal.
130 */
131int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
132{
95b7d924 133 unsigned int i, j;
1da177e4
LT		 134
135 if (mask > 10)
136 return 1;
137
138 for (i = 0; i < mask; i++) {
139 j = i / 2;
140
141 if ((i % 2) != 0) {
142 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
143 return 1;
144 } else {
145 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
146 return 1;
147 }
148 }
149
150 return 0;
151}
152
153/*
154 * Socket removal during an interrupt is now safe.
155 */
156static void rose_remove_socket(struct sock *sk)
157{
158 spin_lock_bh(&rose_list_lock);
159 sk_del_node_init(sk);
160 spin_unlock_bh(&rose_list_lock);
161}
162
163/*
164 * Kill all bound sockets on a broken link layer connection to a
165 * particular neighbour.
166 */
167void rose_kill_by_neigh(struct rose_neigh *neigh)
168{
169 struct sock *s;
170 struct hlist_node *node;
171
172 spin_lock_bh(&rose_list_lock);
173 sk_for_each(s, node, &rose_list) {
174 struct rose_sock *rose = rose_sk(s);
175
176 if (rose->neighbour == neigh) {
177 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
178 rose->neighbour->use--;
179 rose->neighbour = NULL;
180 }
181 }
182 spin_unlock_bh(&rose_list_lock);
183}
184
185/*
186 * Kill all bound sockets on a dropped device.
187 */
188static void rose_kill_by_device(struct net_device *dev)
189{
190 struct sock *s;
191 struct hlist_node *node;
192
193 spin_lock_bh(&rose_list_lock);
194 sk_for_each(s, node, &rose_list) {
195 struct rose_sock *rose = rose_sk(s);
196
197 if (rose->device == dev) {
198 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
199 rose->neighbour->use--;
200 rose->device = NULL;
201 }
202 }
203 spin_unlock_bh(&rose_list_lock);
204}
205
206/*
207 * Handle device status changes.
208 */
209static int rose_device_event(struct notifier_block *this, unsigned long event,
210 void *ptr)
211{
212 struct net_device *dev = (struct net_device *)ptr;
213
721499e8 214 if (!net_eq(dev_net(dev), &init_net))
e9dc8653
EB		 215 return NOTIFY_DONE;
216
1da177e4
LT		 217 if (event != NETDEV_DOWN)
218 return NOTIFY_DONE;
219
220 switch (dev->type) {
221 case ARPHRD_ROSE:
222 rose_kill_by_device(dev);
223 break;
224 case ARPHRD_AX25:
225 rose_link_device_down(dev);
226 rose_rt_device_down(dev);
227 break;
228 }
229
230 return NOTIFY_DONE;
231}
232
233/*
234 * Add a socket to the bound sockets list.
235 */
236static void rose_insert_socket(struct sock *sk)
237{
238
239 spin_lock_bh(&rose_list_lock);
240 sk_add_node(sk, &rose_list);
241 spin_unlock_bh(&rose_list_lock);
242}
243
244/*
245 * Find a socket that wants to accept the Call Request we just
246 * received.
247 */
248static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
249{
250 struct sock *s;
251 struct hlist_node *node;
252
253 spin_lock_bh(&rose_list_lock);
254 sk_for_each(s, node, &rose_list) {
255 struct rose_sock *rose = rose_sk(s);
256
257 if (!rosecmp(&rose->source_addr, addr) &&
258 !ax25cmp(&rose->source_call, call) &&
259 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
260 goto found;
261 }
262
263 sk_for_each(s, node, &rose_list) {
264 struct rose_sock *rose = rose_sk(s);
265
266 if (!rosecmp(&rose->source_addr, addr) &&
267 !ax25cmp(&rose->source_call, &null_ax25_address) &&
268 s->sk_state == TCP_LISTEN)
269 goto found;
270 }
271 s = NULL;
272found:
273 spin_unlock_bh(&rose_list_lock);
274 return s;
275}
276
277/*
278 * Find a connected ROSE socket given my LCI and device.
279 */
280struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
281{
282 struct sock *s;
283 struct hlist_node *node;
284
285 spin_lock_bh(&rose_list_lock);
286 sk_for_each(s, node, &rose_list) {
287 struct rose_sock *rose = rose_sk(s);
288
289 if (rose->lci == lci && rose->neighbour == neigh)
290 goto found;
291 }
292 s = NULL;
293found:
294 spin_unlock_bh(&rose_list_lock);
295 return s;
296}
297
298/*
299 * Find a unique LCI for a given device.
300 */
301unsigned int rose_new_lci(struct rose_neigh *neigh)
302{
303 int lci;
304
305 if (neigh->dce_mode) {
306 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
307 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
308 return lci;
309 } else {
310 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
311 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
312 return lci;
313 }
314
315 return 0;
316}
317
318/*
319 * Deferred destroy.
320 */
321void rose_destroy_socket(struct sock *);
322
323/*
324 * Handler for deferred kills.
325 */
326static void rose_destroy_timer(unsigned long data)
327{
328 rose_destroy_socket((struct sock *)data);
329}
330
331/*
332 * This is called from user mode and the timers. Thus it protects itself
333 * against interrupt users but doesn't worry about being called during
334 * work. Once it is removed from the queue no interrupt or bottom half
335 * will touch it and we are (fairly 8-) ) safe.
336 */
337void rose_destroy_socket(struct sock *sk)
338{
339 struct sk_buff *skb;
340
341 rose_remove_socket(sk);
342 rose_stop_heartbeat(sk);
343 rose_stop_idletimer(sk);
344 rose_stop_timer(sk);
345
346 rose_clear_queues(sk); /* Flush the queues */
347
348 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
349 if (skb->sk != sk) { /* A pending connection */
350 /* Queue the unaccepted socket for death */
351 sock_set_flag(skb->sk, SOCK_DEAD);
352 rose_start_heartbeat(skb->sk);
353 rose_sk(skb->sk)->state = ROSE_STATE_0;
354 }
355
356 kfree_skb(skb);
357 }
358
c564039f 359 if (sk_has_allocations(sk)) {
1da177e4 360 /* Defer: outstanding buffers */
b24b8a24
PE		 361 setup_timer(&sk->sk_timer, rose_destroy_timer,
362 (unsigned long)sk);
1da177e4 363 sk->sk_timer.expires = jiffies + 10 * HZ;
1da177e4
LT		 364 add_timer(&sk->sk_timer);
365 } else
366 sock_put(sk);
367}
368
369/*
370 * Handling for system calls applied via the various interfaces to a
371 * ROSE socket object.
372 */
373
374static int rose_setsockopt(struct socket *sock, int level, int optname,
375 char __user *optval, int optlen)
376{
377 struct sock *sk = sock->sk;
378 struct rose_sock *rose = rose_sk(sk);
379 int opt;
380
381 if (level != SOL_ROSE)
382 return -ENOPROTOOPT;
383
384 if (optlen < sizeof(int))
385 return -EINVAL;
386
387 if (get_user(opt, (int __user *)optval))
388 return -EFAULT;
389
390 switch (optname) {
391 case ROSE_DEFER:
392 rose->defer = opt ? 1 : 0;
393 return 0;
394
395 case ROSE_T1:
396 if (opt < 1)
397 return -EINVAL;
398 rose->t1 = opt * HZ;
399 return 0;
400
401 case ROSE_T2:
402 if (opt < 1)
403 return -EINVAL;
404 rose->t2 = opt * HZ;
405 return 0;
406
407 case ROSE_T3:
408 if (opt < 1)
409 return -EINVAL;
410 rose->t3 = opt * HZ;
411 return 0;
412
413 case ROSE_HOLDBACK:
414 if (opt < 1)
415 return -EINVAL;
416 rose->hb = opt * HZ;
417 return 0;
418
419 case ROSE_IDLE:
420 if (opt < 0)
421 return -EINVAL;
422 rose->idle = opt * 60 * HZ;
423 return 0;
424
425 case ROSE_QBITINCL:
426 rose->qbitincl = opt ? 1 : 0;
427 return 0;
428
429 default:
430 return -ENOPROTOOPT;
431 }
432}
433
434static int rose_getsockopt(struct socket *sock, int level, int optname,
435 char __user *optval, int __user *optlen)
436{
437 struct sock *sk = sock->sk;
438 struct rose_sock *rose = rose_sk(sk);
439 int val = 0;
440 int len;
441
442 if (level != SOL_ROSE)
443 return -ENOPROTOOPT;
444
445 if (get_user(len, optlen))
446 return -EFAULT;
447
448 if (len < 0)
449 return -EINVAL;
450
451 switch (optname) {
452 case ROSE_DEFER:
453 val = rose->defer;
454 break;
455
456 case ROSE_T1:
457 val = rose->t1 / HZ;
458 break;
459
460 case ROSE_T2:
461 val = rose->t2 / HZ;
462 break;
463
464 case ROSE_T3:
465 val = rose->t3 / HZ;
466 break;
467
468 case ROSE_HOLDBACK:
469 val = rose->hb / HZ;
470 break;
471
472 case ROSE_IDLE:
473 val = rose->idle / (60 * HZ);
474 break;
475
476 case ROSE_QBITINCL:
477 val = rose->qbitincl;
478 break;
479
480 default:
481 return -ENOPROTOOPT;
482 }
483
484 len = min_t(unsigned int, len, sizeof(int));
485
486 if (put_user(len, optlen))
487 return -EFAULT;
488
489 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
490}
491
492static int rose_listen(struct socket *sock, int backlog)
493{
494 struct sock *sk = sock->sk;
495
496 if (sk->sk_state != TCP_LISTEN) {
497 struct rose_sock *rose = rose_sk(sk);
498
499 rose->dest_ndigis = 0;
500 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
501 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
502 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
503 sk->sk_max_ack_backlog = backlog;
504 sk->sk_state = TCP_LISTEN;
505 return 0;
506 }
507
508 return -EOPNOTSUPP;
509}
510
511static struct proto rose_proto = {
512 .name = "ROSE",
513 .owner = THIS_MODULE,
514 .obj_size = sizeof(struct rose_sock),
515};
516
1b8d7ae4 517static int rose_create(struct net *net, struct socket *sock, int protocol)
1da177e4
LT		 518{
519 struct sock *sk;
520 struct rose_sock *rose;
521
1b8d7ae4
EB		 522 if (net != &init_net)
523 return -EAFNOSUPPORT;
524
1da177e4
LT		 525 if (sock->type != SOCK_SEQPACKET || protocol != 0)
526 return -ESOCKTNOSUPPORT;
527
6257ff21
PE		 528 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
529 if (sk == NULL)
1da177e4
LT		 530 return -ENOMEM;
531
532 rose = rose_sk(sk);
533
534 sock_init_data(sock, sk);
535
536 skb_queue_head_init(&rose->ack_queue);
537#ifdef M_BIT
538 skb_queue_head_init(&rose->frag_queue);
539 rose->fraglen = 0;
540#endif
541
542 sock->ops = &rose_proto_ops;
543 sk->sk_protocol = protocol;
544
545 init_timer(&rose->timer);
546 init_timer(&rose->idletimer);
547
82e84249
RB		 548 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
549 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
550 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
551 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
552 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
1da177e4
LT		 553
554 rose->state = ROSE_STATE_0;
555
556 return 0;
557}
558
559static struct sock *rose_make_new(struct sock *osk)
560{
561 struct sock *sk;
562 struct rose_sock *rose, *orose;
563
564 if (osk->sk_type != SOCK_SEQPACKET)
565 return NULL;
566
3b1e0a65 567 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto);
6257ff21 568 if (sk == NULL)
1da177e4
LT		 569 return NULL;
570
571 rose = rose_sk(sk);
572
573 sock_init_data(NULL, sk);
574
575 skb_queue_head_init(&rose->ack_queue);
576#ifdef M_BIT
577 skb_queue_head_init(&rose->frag_queue);
578 rose->fraglen = 0;
579#endif
580
581 sk->sk_type = osk->sk_type;
1da177e4
LT		 582 sk->sk_priority = osk->sk_priority;
583 sk->sk_protocol = osk->sk_protocol;
584 sk->sk_rcvbuf = osk->sk_rcvbuf;
585 sk->sk_sndbuf = osk->sk_sndbuf;
586 sk->sk_state = TCP_ESTABLISHED;
53b924b3 587 sock_copy_flags(sk, osk);
1da177e4
LT		 588
589 init_timer(&rose->timer);
590 init_timer(&rose->idletimer);
591
592 orose = rose_sk(osk);
593 rose->t1 = orose->t1;
594 rose->t2 = orose->t2;
595 rose->t3 = orose->t3;
596 rose->hb = orose->hb;
597 rose->idle = orose->idle;
598 rose->defer = orose->defer;
599 rose->device = orose->device;
600 rose->qbitincl = orose->qbitincl;
601
602 return sk;
603}
604
605static int rose_release(struct socket *sock)
606{
607 struct sock *sk = sock->sk;
608 struct rose_sock *rose;
609
610 if (sk == NULL) return 0;
611
4965291a
JP		 612 sock_hold(sk);
613 sock_orphan(sk);
614 lock_sock(sk);
1da177e4
LT		 615 rose = rose_sk(sk);
616
617 switch (rose->state) {
618 case ROSE_STATE_0:
4965291a 619 release_sock(sk);
1da177e4 620 rose_disconnect(sk, 0, -1, -1);
4965291a 621 lock_sock(sk);
1da177e4
LT		 622 rose_destroy_socket(sk);
623 break;
624
625 case ROSE_STATE_2:
626 rose->neighbour->use--;
4965291a 627 release_sock(sk);
1da177e4 628 rose_disconnect(sk, 0, -1, -1);
4965291a 629 lock_sock(sk);
1da177e4
LT		 630 rose_destroy_socket(sk);
631 break;
632
633 case ROSE_STATE_1:
634 case ROSE_STATE_3:
635 case ROSE_STATE_4:
636 case ROSE_STATE_5:
637 rose_clear_queues(sk);
638 rose_stop_idletimer(sk);
639 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
640 rose_start_t3timer(sk);
641 rose->state = ROSE_STATE_2;
642 sk->sk_state = TCP_CLOSE;
643 sk->sk_shutdown |= SEND_SHUTDOWN;
644 sk->sk_state_change(sk);
645 sock_set_flag(sk, SOCK_DEAD);
646 sock_set_flag(sk, SOCK_DESTROY);
647 break;
648
649 default:
650 break;
651 }
652
653 sock->sk = NULL;
4965291a
JP		 654 release_sock(sk);
655 sock_put(sk);
1da177e4
LT		 656
657 return 0;
658}
659
660static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
661{
662 struct sock *sk = sock->sk;
663 struct rose_sock *rose = rose_sk(sk);
664 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
665 struct net_device *dev;
01d7dd0e
RB		 666 ax25_address *source;
667 ax25_uid_assoc *user;
1da177e4
LT		 668 int n;
669
670 if (!sock_flag(sk, SOCK_ZAPPED))
671 return -EINVAL;
672
673 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
674 return -EINVAL;
675
676 if (addr->srose_family != AF_ROSE)
677 return -EINVAL;
678
679 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
680 return -EINVAL;
681
682 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
683 return -EINVAL;
684
685 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
686 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
687 return -EADDRNOTAVAIL;
688 }
689
690 source = &addr->srose_call;
691
c2a2b8d3 692 user = ax25_findbyuid(current_euid());
01d7dd0e
RB		 693 if (user) {
694 rose->source_call = user->call;
695 ax25_uid_put(user);
696 } else {
1da177e4
LT		 697 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
698 return -EACCES;
01d7dd0e 699 rose->source_call = *source;
1da177e4
LT		 700 }
701
702 rose->source_addr = addr->srose_addr;
1da177e4
LT		 703 rose->device = dev;
704 rose->source_ndigis = addr->srose_ndigis;
705
706 if (addr_len == sizeof(struct full_sockaddr_rose)) {
707 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
708 for (n = 0 ; n < addr->srose_ndigis ; n++)
709 rose->source_digis[n] = full_addr->srose_digis[n];
710 } else {
711 if (rose->source_ndigis == 1) {
712 rose->source_digis[0] = addr->srose_digi;
713 }
714 }
715
716 rose_insert_socket(sk);
717
718 sock_reset_flag(sk, SOCK_ZAPPED);
719 SOCK_DEBUG(sk, "ROSE: socket is bound\n");
720 return 0;
721}
722
723static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
724{
725 struct sock *sk = sock->sk;
726 struct rose_sock *rose = rose_sk(sk);
727 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
728 unsigned char cause, diagnostic;
1da177e4 729 struct net_device *dev;
01d7dd0e 730 ax25_uid_assoc *user;
2536b94a 731 int n, err = 0;
1da177e4
LT		 732
733 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
734 return -EINVAL;
735
736 if (addr->srose_family != AF_ROSE)
737 return -EINVAL;
738
739 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
740 return -EINVAL;
741
742 if (addr->srose_ndigis > ROSE_MAX_DIGIS)
743 return -EINVAL;
744
745 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
746 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
747 return -EINVAL;
748
2536b94a
RB		 749 lock_sock(sk);
750
751 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
752 /* Connect completed during a ERESTARTSYS event */
753 sock->state = SS_CONNECTED;
754 goto out_release;
755 }
756
757 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
758 sock->state = SS_UNCONNECTED;
759 err = -ECONNREFUSED;
760 goto out_release;
761 }
762
763 if (sk->sk_state == TCP_ESTABLISHED) {
764 /* No reconnect on a seqpacket socket */
765 err = -EISCONN;
766 goto out_release;
767 }
768
769 sk->sk_state = TCP_CLOSE;
770 sock->state = SS_UNCONNECTED;
771
1da177e4 772 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
fe2c802a 773 &diagnostic, 0);
43837b1e
BP		 774 if (!rose->neighbour) {
775 err = -ENETUNREACH;
776 goto out_release;
777 }
1da177e4
LT		 778
779 rose->lci = rose_new_lci(rose->neighbour);
2536b94a
RB		 780 if (!rose->lci) {
781 err = -ENETUNREACH;
782 goto out_release;
783 }
1da177e4
LT		 784
785 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
786 sock_reset_flag(sk, SOCK_ZAPPED);
787
2536b94a
RB		 788 if ((dev = rose_dev_first()) == NULL) {
789 err = -ENETUNREACH;
790 goto out_release;
791 }
1da177e4 792
c2a2b8d3 793 user = ax25_findbyuid(current_euid());
2536b94a
RB		 794 if (!user) {
795 err = -EINVAL;
796 goto out_release;
797 }
1da177e4
LT		 798
799 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
01d7dd0e 800 rose->source_call = user->call;
1da177e4 801 rose->device = dev;
01d7dd0e 802 ax25_uid_put(user);
1da177e4
LT		 803
804 rose_insert_socket(sk); /* Finish the bind */
805 }
d85838c5 806rose_try_next_neigh:
1da177e4
LT		 807 rose->dest_addr = addr->srose_addr;
808 rose->dest_call = addr->srose_call;
809 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
810 rose->dest_ndigis = addr->srose_ndigis;
811
812 if (addr_len == sizeof(struct full_sockaddr_rose)) {
813 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
814 for (n = 0 ; n < addr->srose_ndigis ; n++)
815 rose->dest_digis[n] = full_addr->srose_digis[n];
816 } else {
817 if (rose->dest_ndigis == 1) {
818 rose->dest_digis[0] = addr->srose_digi;
819 }
820 }
821
822 /* Move to connecting socket, start sending Connect Requests */
823 sock->state = SS_CONNECTING;
824 sk->sk_state = TCP_SYN_SENT;
825
826 rose->state = ROSE_STATE_1;
827
828 rose->neighbour->use++;
829
830 rose_write_internal(sk, ROSE_CALL_REQUEST);
831 rose_start_heartbeat(sk);
832 rose_start_t1timer(sk);
833
834 /* Now the loop */
2536b94a
RB		 835 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
836 err = -EINPROGRESS;
837 goto out_release;
838 }
1da177e4
LT		 839
840 /*
841 * A Connect Ack with Choke or timeout or failed routing will go to
842 * closed.
843 */
844 if (sk->sk_state == TCP_SYN_SENT) {
75606dc6 845 DEFINE_WAIT(wait);
1da177e4 846
1da177e4 847 for (;;) {
75606dc6 848 prepare_to_wait(sk->sk_sleep, &wait,
6140efb5 849 TASK_INTERRUPTIBLE);
1da177e4
LT		 850 if (sk->sk_state != TCP_SYN_SENT)
851 break;
75606dc6
RB		 852 if (!signal_pending(current)) {
853 release_sock(sk);
1da177e4 854 schedule();
2536b94a 855 lock_sock(sk);
1da177e4
LT		 856 continue;
857 }
75606dc6
RB		 858 err = -ERESTARTSYS;
859 break;
1da177e4 860 }
75606dc6
RB		 861 finish_wait(sk->sk_sleep, &wait);
862
863 if (err)
864 goto out_release;
1da177e4
LT		 865 }
866
867 if (sk->sk_state != TCP_ESTABLISHED) {
d85838c5 868 /* Try next neighbour */
fe2c802a 869 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic, 0);
d85838c5
RB		 870 if (rose->neighbour)
871 goto rose_try_next_neigh;
2536b94a
RB		 872
873 /* No more neighbours */
1da177e4 874 sock->state = SS_UNCONNECTED;
2536b94a
RB		 875 err = sock_error(sk); /* Always set at this point */
876 goto out_release;
1da177e4
LT		 877 }
878
879 sock->state = SS_CONNECTED;
880
2536b94a
RB		 881out_release:
882 release_sock(sk);
883
884 return err;
1da177e4
LT		 885}
886
887static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
888{
1da177e4
LT		 889 struct sk_buff *skb;
890 struct sock *newsk;
75606dc6 891 DEFINE_WAIT(wait);
1da177e4
LT		 892 struct sock *sk;
893 int err = 0;
894
895 if ((sk = sock->sk) == NULL)
896 return -EINVAL;
897
898 lock_sock(sk);
899 if (sk->sk_type != SOCK_SEQPACKET) {
900 err = -EOPNOTSUPP;
75606dc6 901 goto out_release;
1da177e4
LT		 902 }
903
904 if (sk->sk_state != TCP_LISTEN) {
905 err = -EINVAL;
75606dc6 906 goto out_release;
1da177e4
LT		 907 }
908
909 /*
910 * The write queue this time is holding sockets ready to use
911 * hooked into the SABM we saved
912 */
1da177e4 913 for (;;) {
75606dc6
RB		 914 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
915
1da177e4
LT		 916 skb = skb_dequeue(&sk->sk_receive_queue);
917 if (skb)
918 break;
919
1da177e4 920 if (flags & O_NONBLOCK) {
75606dc6
RB		 921 err = -EWOULDBLOCK;
922 break;
1da177e4 923 }
75606dc6
RB		 924 if (!signal_pending(current)) {
925 release_sock(sk);
1da177e4
LT		 926 schedule();
927 lock_sock(sk);
928 continue;
929 }
75606dc6
RB		 930 err = -ERESTARTSYS;
931 break;
1da177e4 932 }
75606dc6
RB		 933 finish_wait(sk->sk_sleep, &wait);
934 if (err)
935 goto out_release;
1da177e4
LT		 936
937 newsk = skb->sk;
44ccff1f 938 sock_graft(newsk, newsock);
1da177e4
LT		 939
940 /* Now attach up the new socket */
941 skb->sk = NULL;
942 kfree_skb(skb);
943 sk->sk_ack_backlog--;
1da177e4 944
75606dc6 945out_release:
1da177e4
LT		 946 release_sock(sk);
947
948 return err;
949}
950
951static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
952 int *uaddr_len, int peer)
953{
954 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
955 struct sock *sk = sock->sk;
956 struct rose_sock *rose = rose_sk(sk);
957 int n;
958
959 if (peer != 0) {
960 if (sk->sk_state != TCP_ESTABLISHED)
961 return -ENOTCONN;
962 srose->srose_family = AF_ROSE;
963 srose->srose_addr = rose->dest_addr;
964 srose->srose_call = rose->dest_call;
965 srose->srose_ndigis = rose->dest_ndigis;
966 for (n = 0; n < rose->dest_ndigis; n++)
967 srose->srose_digis[n] = rose->dest_digis[n];
968 } else {
969 srose->srose_family = AF_ROSE;
970 srose->srose_addr = rose->source_addr;
971 srose->srose_call = rose->source_call;
972 srose->srose_ndigis = rose->source_ndigis;
973 for (n = 0; n < rose->source_ndigis; n++)
974 srose->srose_digis[n] = rose->source_digis[n];
975 }
976
977 *uaddr_len = sizeof(struct full_sockaddr_rose);
978 return 0;
979}
980
981int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
982{
983 struct sock *sk;
984 struct sock *make;
985 struct rose_sock *make_rose;
986 struct rose_facilities_struct facilities;
987 int n, len;
988
989 skb->sk = NULL; /* Initially we don't know who it's for */
990
991 /*
992 * skb->data points to the rose frame start
993 */
994 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
995
95b7d924
ED		 996 len = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
997 len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
1da177e4
LT		 998 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
999 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
1000 return 0;
1001 }
1002
1003 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1004
1005 /*
1006 * We can't accept the Call Request.
1007 */
1008 if (sk == NULL || sk_acceptq_is_full(sk) ||
1009 (make = rose_make_new(sk)) == NULL) {
1010 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1011 return 0;
1012 }
1013
1014 skb->sk = make;
1015 make->sk_state = TCP_ESTABLISHED;
1016 make_rose = rose_sk(make);
1017
1018 make_rose->lci = lci;
1019 make_rose->dest_addr = facilities.dest_addr;
1020 make_rose->dest_call = facilities.dest_call;
1021 make_rose->dest_ndigis = facilities.dest_ndigis;
1022 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1023 make_rose->dest_digis[n] = facilities.dest_digis[n];
1024 make_rose->source_addr = facilities.source_addr;
1025 make_rose->source_call = facilities.source_call;
1026 make_rose->source_ndigis = facilities.source_ndigis;
1027 for (n = 0 ; n < facilities.source_ndigis ; n++)
1028 make_rose->source_digis[n]= facilities.source_digis[n];
1029 make_rose->neighbour = neigh;
1030 make_rose->device = dev;
1031 make_rose->facilities = facilities;
1032
1033 make_rose->neighbour->use++;
1034
1035 if (rose_sk(sk)->defer) {
1036 make_rose->state = ROSE_STATE_5;
1037 } else {
1038 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1039 make_rose->state = ROSE_STATE_3;
1040 rose_start_idletimer(make);
1041 }
1042
1043 make_rose->condition = 0x00;
1044 make_rose->vs = 0;
1045 make_rose->va = 0;
1046 make_rose->vr = 0;
1047 make_rose->vl = 0;
1048 sk->sk_ack_backlog++;
1049
1050 rose_insert_socket(make);
1051
1052 skb_queue_head(&sk->sk_receive_queue, skb);
1053
1054 rose_start_heartbeat(make);
1055
1056 if (!sock_flag(sk, SOCK_DEAD))
1057 sk->sk_data_ready(sk, skb->len);
1058
1059 return 1;
1060}
1061
1062static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1063 struct msghdr *msg, size_t len)
1064{
1065 struct sock *sk = sock->sk;
1066 struct rose_sock *rose = rose_sk(sk);
1067 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1068 int err;
1069 struct full_sockaddr_rose srose;
1070 struct sk_buff *skb;
1071 unsigned char *asmptr;
1072 int n, size, qbit = 0;
1073
1074 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1075 return -EINVAL;
1076
1077 if (sock_flag(sk, SOCK_ZAPPED))
1078 return -EADDRNOTAVAIL;
1079
1080 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1081 send_sig(SIGPIPE, current, 0);
1082 return -EPIPE;
1083 }
1084
1085 if (rose->neighbour == NULL || rose->device == NULL)
1086 return -ENETUNREACH;
1087
1088 if (usrose != NULL) {
1089 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1090 return -EINVAL;
1091 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1092 memcpy(&srose, usrose, msg->msg_namelen);
1093 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1094 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1095 return -EISCONN;
1096 if (srose.srose_ndigis != rose->dest_ndigis)
1097 return -EISCONN;
1098 if (srose.srose_ndigis == rose->dest_ndigis) {
1099 for (n = 0 ; n < srose.srose_ndigis ; n++)
1100 if (ax25cmp(&rose->dest_digis[n],
1101 &srose.srose_digis[n]))
1102 return -EISCONN;
1103 }
1104 if (srose.srose_family != AF_ROSE)
1105 return -EINVAL;
1106 } else {
1107 if (sk->sk_state != TCP_ESTABLISHED)
1108 return -ENOTCONN;
1109
1110 srose.srose_family = AF_ROSE;
1111 srose.srose_addr = rose->dest_addr;
1112 srose.srose_call = rose->dest_call;
1113 srose.srose_ndigis = rose->dest_ndigis;
1114 for (n = 0 ; n < rose->dest_ndigis ; n++)
1115 srose.srose_digis[n] = rose->dest_digis[n];
1116 }
1117
1118 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1119
1120 /* Build a packet */
1121 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
83e0bbcb
AC		 1122 /* Sanity check the packet size */
1123 if (len > 65535)
1124 return -EMSGSIZE;
1125
1da177e4
LT		 1126 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1127
1128 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1129 return err;
1130
1131 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1132
1133 /*
1134 * Put the data on the end
1135 */
1136 SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1137
eeeb0374
ACM		 1138 skb_reset_transport_header(skb);
1139 skb_put(skb, len);
1da177e4 1140
eeeb0374 1141 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1da177e4
LT		 1142 if (err) {
1143 kfree_skb(skb);
1144 return err;
1145 }
1146
1147 /*
1148 * If the Q BIT Include socket option is in force, the first
1149 * byte of the user data is the logical value of the Q Bit.
1150 */
1151 if (rose->qbitincl) {
1152 qbit = skb->data[0];
1153 skb_pull(skb, 1);
1154 }
1155
1156 /*
1157 * Push down the ROSE header
1158 */
1159 asmptr = skb_push(skb, ROSE_MIN_LEN);
1160
1161 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1162
1163 /* Build a ROSE Network header */
1164 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1165 asmptr[1] = (rose->lci >> 0) & 0xFF;
1166 asmptr[2] = ROSE_DATA;
1167
1168 if (qbit)
1169 asmptr[0] |= ROSE_Q_BIT;
1170
1171 SOCK_DEBUG(sk, "ROSE: Built header.\n");
1172
1173 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1174
1175 if (sk->sk_state != TCP_ESTABLISHED) {
1176 kfree_skb(skb);
1177 return -ENOTCONN;
1178 }
1179
1180#ifdef M_BIT
1181#define ROSE_PACLEN (256-ROSE_MIN_LEN)
1182 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1183 unsigned char header[ROSE_MIN_LEN];
1184 struct sk_buff *skbn;
1185 int frontlen;
1186 int lg;
1187
1188 /* Save a copy of the Header */
d626f62b 1189 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1da177e4
LT		 1190 skb_pull(skb, ROSE_MIN_LEN);
1191
1192 frontlen = skb_headroom(skb);
1193
1194 while (skb->len > 0) {
1195 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1196 kfree_skb(skb);
1197 return err;
1198 }
1199
1200 skbn->sk = sk;
1201 skbn->free = 1;
1202 skbn->arp = 1;
1203
1204 skb_reserve(skbn, frontlen);
1205
1206 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1207
1208 /* Copy the user data */
d626f62b 1209 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1da177e4
LT		 1210 skb_pull(skb, lg);
1211
1212 /* Duplicate the Header */
1213 skb_push(skbn, ROSE_MIN_LEN);
27d7ff46 1214 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1da177e4
LT		 1215
1216 if (skb->len > 0)
1217 skbn->data[2] |= M_BIT;
1218
1219 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1220 }
1221
1222 skb->free = 1;
1223 kfree_skb(skb);
1224 } else {
1225 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1226 }
1227#else
1228 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1229#endif
1230
1231 rose_kick(sk);
1232
1233 return len;
1234}
1235
1236
1237static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1238 struct msghdr *msg, size_t size, int flags)
1239{
1240 struct sock *sk = sock->sk;
1241 struct rose_sock *rose = rose_sk(sk);
1242 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1243 size_t copied;
1244 unsigned char *asmptr;
1245 struct sk_buff *skb;
1246 int n, er, qbit;
1247
1248 /*
1249 * This works for seqpacket too. The receiver has ordered the queue for
1250 * us! We do one quick check first though
1251 */
1252 if (sk->sk_state != TCP_ESTABLISHED)
1253 return -ENOTCONN;
1254
1255 /* Now we can treat all alike */
1256 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1257 return er;
1258
1259 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1260
1261 skb_pull(skb, ROSE_MIN_LEN);
1262
1263 if (rose->qbitincl) {
1264 asmptr = skb_push(skb, 1);
1265 *asmptr = qbit;
1266 }
1267
badff6d0 1268 skb_reset_transport_header(skb);
1da177e4
LT		 1269 copied = skb->len;
1270
1271 if (copied > size) {
1272 copied = size;
1273 msg->msg_flags |= MSG_TRUNC;
1274 }
1275
1276 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1277
1278 if (srose != NULL) {
1279 srose->srose_family = AF_ROSE;
1280 srose->srose_addr = rose->dest_addr;
1281 srose->srose_call = rose->dest_call;
1282 srose->srose_ndigis = rose->dest_ndigis;
1283 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1284 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1285 for (n = 0 ; n < rose->dest_ndigis ; n++)
1286 full_srose->srose_digis[n] = rose->dest_digis[n];
1287 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1288 } else {
1289 if (rose->dest_ndigis >= 1) {
1290 srose->srose_ndigis = 1;
1291 srose->srose_digi = rose->dest_digis[0];
1292 }
1293 msg->msg_namelen = sizeof(struct sockaddr_rose);
1294 }
1295 }
1296
1297 skb_free_datagram(sk, skb);
1298
1299 return copied;
1300}
1301
1302
1303static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1304{
1305 struct sock *sk = sock->sk;
1306 struct rose_sock *rose = rose_sk(sk);
1307 void __user *argp = (void __user *)arg;
1308
1309 switch (cmd) {
1310 case TIOCOUTQ: {
1311 long amount;
31e6d363
ED		 1312
1313 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1da177e4
LT		 1314 if (amount < 0)
1315 amount = 0;
20b7d10a 1316 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1317 }
1318
1319 case TIOCINQ: {
1320 struct sk_buff *skb;
1321 long amount = 0L;
1322 /* These two are safe on a single CPU system as only user tasks fiddle here */
1323 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1324 amount = skb->len;
20b7d10a 1325 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1326 }
1327
1328 case SIOCGSTAMP:
20b7d10a 1329 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1da177e4 1330
ae40eb1e
ED		 1331 case SIOCGSTAMPNS:
1332 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1333
1da177e4
LT		 1334 case SIOCGIFADDR:
1335 case SIOCSIFADDR:
1336 case SIOCGIFDSTADDR:
1337 case SIOCSIFDSTADDR:
1338 case SIOCGIFBRDADDR:
1339 case SIOCSIFBRDADDR:
1340 case SIOCGIFNETMASK:
1341 case SIOCSIFNETMASK:
1342 case SIOCGIFMETRIC:
1343 case SIOCSIFMETRIC:
1344 return -EINVAL;
1345
1346 case SIOCADDRT:
1347 case SIOCDELRT:
1348 case SIOCRSCLRRT:
1349 if (!capable(CAP_NET_ADMIN))
1350 return -EPERM;
1351 return rose_rt_ioctl(cmd, argp);
1352
1353 case SIOCRSGCAUSE: {
1354 struct rose_cause_struct rose_cause;
1355 rose_cause.cause = rose->cause;
1356 rose_cause.diagnostic = rose->diagnostic;
1357 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1358 }
1359
1360 case SIOCRSSCAUSE: {
1361 struct rose_cause_struct rose_cause;
1362 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1363 return -EFAULT;
1364 rose->cause = rose_cause.cause;
1365 rose->diagnostic = rose_cause.diagnostic;
1366 return 0;
1367 }
1368
1369 case SIOCRSSL2CALL:
1370 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1371 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1372 ax25_listen_release(&rose_callsign, NULL);
1373 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1374 return -EFAULT;
1375 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
81dcd169
RB		 1376 return ax25_listen_register(&rose_callsign, NULL);
1377
1da177e4
LT		 1378 return 0;
1379
1380 case SIOCRSGL2CALL:
1381 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1382
1383 case SIOCRSACCEPT:
1384 if (rose->state == ROSE_STATE_5) {
1385 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1386 rose_start_idletimer(sk);
1387 rose->condition = 0x00;
1388 rose->vs = 0;
1389 rose->va = 0;
1390 rose->vr = 0;
1391 rose->vl = 0;
1392 rose->state = ROSE_STATE_3;
1393 }
1394 return 0;
1395
1396 default:
b5e5fa5e 1397 return -ENOIOCTLCMD;
1da177e4
LT		 1398 }
1399
1400 return 0;
1401}
1402
1403#ifdef CONFIG_PROC_FS
1404static void *rose_info_start(struct seq_file *seq, loff_t *pos)
95b7d924 1405 __acquires(rose_list_lock)
1da177e4
LT		 1406{
1407 int i;
1408 struct sock *s;
1409 struct hlist_node *node;
1410
1411 spin_lock_bh(&rose_list_lock);
1412 if (*pos == 0)
1413 return SEQ_START_TOKEN;
3dcf7c5e 1414
1da177e4
LT		 1415 i = 1;
1416 sk_for_each(s, node, &rose_list) {
1417 if (i == *pos)
1418 return s;
1419 ++i;
1420 }
1421 return NULL;
1422}
1423
1424static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1425{
1426 ++*pos;
1427
3dcf7c5e 1428 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1da177e4
LT		 1429 : sk_next((struct sock *)v);
1430}
3dcf7c5e 1431
1da177e4 1432static void rose_info_stop(struct seq_file *seq, void *v)
95b7d924 1433 __releases(rose_list_lock)
1da177e4
LT		 1434{
1435 spin_unlock_bh(&rose_list_lock);
1436}
1437
1438static int rose_info_show(struct seq_file *seq, void *v)
1439{
f75268cd
RB		 1440 char buf[11];
1441
1da177e4 1442 if (v == SEQ_START_TOKEN)
3dcf7c5e 1443 seq_puts(seq,
1da177e4
LT		 1444 "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");
1445
1446 else {
1447 struct sock *s = v;
1448 struct rose_sock *rose = rose_sk(s);
1449 const char *devname, *callsign;
1450 const struct net_device *dev = rose->device;
1451
1452 if (!dev)
1453 devname = "???";
1454 else
1455 devname = dev->name;
3dcf7c5e 1456
1da177e4
LT		 1457 seq_printf(seq, "%-10s %-9s ",
1458 rose2asc(&rose->dest_addr),
f75268cd 1459 ax2asc(buf, &rose->dest_call));
1da177e4
LT		 1460
1461 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1462 callsign = "??????-?";
1463 else
f75268cd 1464 callsign = ax2asc(buf, &rose->source_call);
1da177e4
LT		 1465
1466 seq_printf(seq,
1467 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1468 rose2asc(&rose->source_addr),
1469 callsign,
1470 devname,
1471 rose->lci & 0x0FFF,
1472 (rose->neighbour) ? rose->neighbour->number : 0,
1473 rose->state,
1474 rose->vs,
1475 rose->vr,
1476 rose->va,
1477 ax25_display_timer(&rose->timer) / HZ,
1478 rose->t1 / HZ,
1479 rose->t2 / HZ,
1480 rose->t3 / HZ,
1481 rose->hb / HZ,
1482 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1483 rose->idle / (60 * HZ),
31e6d363
ED		 1484 sk_wmem_alloc_get(s),
1485 sk_rmem_alloc_get(s),
1da177e4
LT		 1486 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1487 }
1488
1489 return 0;
1490}
1491
56b3d975 1492static const struct seq_operations rose_info_seqops = {
1da177e4
LT		 1493 .start = rose_info_start,
1494 .next = rose_info_next,
1495 .stop = rose_info_stop,
1496 .show = rose_info_show,
1497};
1498
1499static int rose_info_open(struct inode *inode, struct file *file)
1500{
1501 return seq_open(file, &rose_info_seqops);
1502}
1503
da7071d7 1504static const struct file_operations rose_info_fops = {
1da177e4
LT		 1505 .owner = THIS_MODULE,
1506 .open = rose_info_open,
1507 .read = seq_read,
1508 .llseek = seq_lseek,
1509 .release = seq_release,
1510};
1511#endif /* CONFIG_PROC_FS */
1512
1513static struct net_proto_family rose_family_ops = {
1514 .family = PF_ROSE,
1515 .create = rose_create,
1516 .owner = THIS_MODULE,
1517};
1518
1519static struct proto_ops rose_proto_ops = {
1520 .family = PF_ROSE,
1521 .owner = THIS_MODULE,
1522 .release = rose_release,
1523 .bind = rose_bind,
1524 .connect = rose_connect,
1525 .socketpair = sock_no_socketpair,
1526 .accept = rose_accept,
1527 .getname = rose_getname,
1528 .poll = datagram_poll,
1529 .ioctl = rose_ioctl,
1530 .listen = rose_listen,
1531 .shutdown = sock_no_shutdown,
1532 .setsockopt = rose_setsockopt,
1533 .getsockopt = rose_getsockopt,
1534 .sendmsg = rose_sendmsg,
1535 .recvmsg = rose_recvmsg,
1536 .mmap = sock_no_mmap,
1537 .sendpage = sock_no_sendpage,
1538};
1539
1540static struct notifier_block rose_dev_notifier = {
1541 .notifier_call = rose_device_event,
1542};
1543
1544static struct net_device **dev_rose;
1545
8d5cf596
RB		 1546static struct ax25_protocol rose_pid = {
1547 .pid = AX25_P_ROSE,
1548 .func = rose_route_frame
1549};
1550
a4282717
RB		 1551static struct ax25_linkfail rose_linkfail_notifier = {
1552 .func = rose_link_failed
1553};
1554
1da177e4
LT		 1555static int __init rose_proto_init(void)
1556{
1557 int i;
a83cd2cc 1558 int rc;
1da177e4 1559
a83cd2cc
AD		 1560 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1561 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1562 rc = -EINVAL;
1563 goto out;
1564 }
1565
1566 rc = proto_register(&rose_proto, 0);
1da177e4
LT		 1567 if (rc != 0)
1568 goto out;
1569
1570 rose_callsign = null_ax25_address;
1571
1b30dd35 1572 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1da177e4
LT		 1573 if (dev_rose == NULL) {
1574 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
a83cd2cc
AD		 1575 rc = -ENOMEM;
1576 goto out_proto_unregister;
1da177e4
LT		 1577 }
1578
1da177e4
LT		 1579 for (i = 0; i < rose_ndevs; i++) {
1580 struct net_device *dev;
1581 char name[IFNAMSIZ];
1582
1583 sprintf(name, "rose%d", i);
d289d120 1584 dev = alloc_netdev(0, name, rose_setup);
1da177e4
LT		 1585 if (!dev) {
1586 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
70ff3b66 1587 rc = -ENOMEM;
1da177e4
LT		 1588 goto fail;
1589 }
70ff3b66
AD		 1590 rc = register_netdev(dev);
1591 if (rc) {
520d1b83 1592 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1da177e4
LT		 1593 free_netdev(dev);
1594 goto fail;
1595 }
c773e847 1596 rose_set_lockdep_key(dev);
1da177e4
LT		 1597 dev_rose[i] = dev;
1598 }
1599
1600 sock_register(&rose_family_ops);
1601 register_netdevice_notifier(&rose_dev_notifier);
1da177e4 1602
8d5cf596 1603 ax25_register_pid(&rose_pid);
a4282717 1604 ax25_linkfail_register(&rose_linkfail_notifier);
1da177e4
LT		 1605
1606#ifdef CONFIG_SYSCTL
1607 rose_register_sysctl();
1608#endif
1609 rose_loopback_init();
1610
1611 rose_add_loopback_neigh();
1612
457c4cbc
EB		 1613 proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1614 proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1615 proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1616 proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1da177e4
LT		 1617out:
1618 return rc;
1619fail:
1620 while (--i >= 0) {
1621 unregister_netdev(dev_rose[i]);
1622 free_netdev(dev_rose[i]);
1623 }
1624 kfree(dev_rose);
a83cd2cc 1625out_proto_unregister:
1da177e4 1626 proto_unregister(&rose_proto);
70ff3b66 1627 goto out;
1da177e4
LT		 1628}
1629module_init(rose_proto_init);
1630
1631module_param(rose_ndevs, int, 0);
1632MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1633
1634MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1635MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1636MODULE_LICENSE("GPL");
1637MODULE_ALIAS_NETPROTO(PF_ROSE);
1638
1639static void __exit rose_exit(void)
1640{
1641 int i;
1642
457c4cbc
EB		 1643 proc_net_remove(&init_net, "rose");
1644 proc_net_remove(&init_net, "rose_neigh");
1645 proc_net_remove(&init_net, "rose_nodes");
1646 proc_net_remove(&init_net, "rose_routes");
1da177e4
LT		 1647 rose_loopback_clear();
1648
1649 rose_rt_free();
1650
1651 ax25_protocol_release(AX25_P_ROSE);
a4282717 1652 ax25_linkfail_release(&rose_linkfail_notifier);
1da177e4
LT		 1653
1654 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1655 ax25_listen_release(&rose_callsign, NULL);
1656
1657#ifdef CONFIG_SYSCTL
1658 rose_unregister_sysctl();
1659#endif
1660 unregister_netdevice_notifier(&rose_dev_notifier);
1661
1662 sock_unregister(PF_ROSE);
1663
1664 for (i = 0; i < rose_ndevs; i++) {
1665 struct net_device *dev = dev_rose[i];
1666
1667 if (dev) {
1668 unregister_netdev(dev);
1669 free_netdev(dev);
1670 }
1671 }
1672
1673 kfree(dev_rose);
1674 proto_unregister(&rose_proto);
1675}
1676
1677module_exit(rose_exit);
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