1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 *
4 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
5 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
6 * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
7 * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
8 */
9
10 #include <linux/capability.h>
11 #include <linux/module.h>
12 #include <linux/moduleparam.h>
13 #include <linux/init.h>
14 #include <linux/errno.h>
15 #include <linux/types.h>
16 #include <linux/socket.h>
17 #include <linux/in.h>
18 #include <linux/slab.h>
19 #include <linux/kernel.h>
20 #include <linux/sched/signal.h>
21 #include <linux/spinlock.h>
22 #include <linux/timer.h>
23 #include <linux/string.h>
24 #include <linux/sockios.h>
25 #include <linux/net.h>
26 #include <linux/stat.h>
27 #include <net/net_namespace.h>
28 #include <net/ax25.h>
29 #include <linux/inet.h>
30 #include <linux/netdevice.h>
31 #include <linux/if_arp.h>
32 #include <linux/skbuff.h>
33 #include <net/sock.h>
34 #include <linux/uaccess.h>
35 #include <linux/fcntl.h>
36 #include <linux/termios.h>
37 #include <linux/mm.h>
38 #include <linux/interrupt.h>
39 #include <linux/notifier.h>
40 #include <net/rose.h>
41 #include <linux/proc_fs.h>
42 #include <linux/seq_file.h>
43 #include <net/tcp_states.h>
44 #include <net/ip.h>
45 #include <net/arp.h>
46
47 static int rose_ndevs = 10;
48
49 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
50 int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
51 int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
52 int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
53 int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
54 int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
55 int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
56 int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
57 int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
58 int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
59
60 static HLIST_HEAD(rose_list);
61 static DEFINE_SPINLOCK(rose_list_lock);
62
63 static const struct proto_ops rose_proto_ops;
64
65 ax25_address rose_callsign;
66
67 /*
68 * ROSE network devices are virtual network devices encapsulating ROSE
69 * frames into AX.25 which will be sent through an AX.25 device, so form a
70 * special "super class" of normal net devices; split their locks off into a
71 * separate class since they always nest.
72 */
73 static struct lock_class_key rose_netdev_xmit_lock_key;
74 static struct lock_class_key rose_netdev_addr_lock_key;
75
rose_set_lockdep_one(struct net_device * dev,struct netdev_queue * txq,void * _unused)76 static void rose_set_lockdep_one(struct net_device *dev,
77 struct netdev_queue *txq,
78 void *_unused)
79 {
80 lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
81 }
82
rose_set_lockdep_key(struct net_device * dev)83 static void rose_set_lockdep_key(struct net_device *dev)
84 {
85 lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
86 netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
87 }
88
89 /*
90 * Convert a ROSE address into text.
91 */
rose2asc(char * buf,const rose_address * addr)92 char *rose2asc(char *buf, const rose_address *addr)
93 {
94 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
95 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
96 addr->rose_addr[4] == 0x00) {
97 strcpy(buf, "*");
98 } else {
99 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
100 addr->rose_addr[1] & 0xFF,
101 addr->rose_addr[2] & 0xFF,
102 addr->rose_addr[3] & 0xFF,
103 addr->rose_addr[4] & 0xFF);
104 }
105
106 return buf;
107 }
108
109 /*
110 * Compare two ROSE addresses, 0 == equal.
111 */
rosecmp(rose_address * addr1,rose_address * addr2)112 int rosecmp(rose_address *addr1, rose_address *addr2)
113 {
114 int i;
115
116 for (i = 0; i < 5; i++)
117 if (addr1->rose_addr[i] != addr2->rose_addr[i])
118 return 1;
119
120 return 0;
121 }
122
123 /*
124 * Compare two ROSE addresses for only mask digits, 0 == equal.
125 */
rosecmpm(rose_address * addr1,rose_address * addr2,unsigned short mask)126 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
127 {
128 unsigned int i, j;
129
130 if (mask > 10)
131 return 1;
132
133 for (i = 0; i < mask; i++) {
134 j = i / 2;
135
136 if ((i % 2) != 0) {
137 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
138 return 1;
139 } else {
140 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
141 return 1;
142 }
143 }
144
145 return 0;
146 }
147
148 /*
149 * Socket removal during an interrupt is now safe.
150 */
rose_remove_socket(struct sock * sk)151 static void rose_remove_socket(struct sock *sk)
152 {
153 spin_lock_bh(&rose_list_lock);
154 sk_del_node_init(sk);
155 spin_unlock_bh(&rose_list_lock);
156 }
157
158 /*
159 * Kill all bound sockets on a broken link layer connection to a
160 * particular neighbour.
161 */
rose_kill_by_neigh(struct rose_neigh * neigh)162 void rose_kill_by_neigh(struct rose_neigh *neigh)
163 {
164 struct sock *s;
165
166 spin_lock_bh(&rose_list_lock);
167 sk_for_each(s, &rose_list) {
168 struct rose_sock *rose = rose_sk(s);
169
170 if (rose->neighbour == neigh) {
171 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
172 rose->neighbour->use--;
173 rose->neighbour = NULL;
174 }
175 }
176 spin_unlock_bh(&rose_list_lock);
177 }
178
179 /*
180 * Kill all bound sockets on a dropped device.
181 */
rose_kill_by_device(struct net_device * dev)182 static void rose_kill_by_device(struct net_device *dev)
183 {
184 struct sock *s;
185
186 spin_lock_bh(&rose_list_lock);
187 sk_for_each(s, &rose_list) {
188 struct rose_sock *rose = rose_sk(s);
189
190 if (rose->device == dev) {
191 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
192 if (rose->neighbour)
193 rose->neighbour->use--;
194 rose->device = NULL;
195 }
196 }
197 spin_unlock_bh(&rose_list_lock);
198 }
199
200 /*
201 * Handle device status changes.
202 */
rose_device_event(struct notifier_block * this,unsigned long event,void * ptr)203 static int rose_device_event(struct notifier_block *this,
204 unsigned long event, void *ptr)
205 {
206 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
207
208 if (!net_eq(dev_net(dev), &init_net))
209 return NOTIFY_DONE;
210
211 if (event != NETDEV_DOWN)
212 return NOTIFY_DONE;
213
214 switch (dev->type) {
215 case ARPHRD_ROSE:
216 rose_kill_by_device(dev);
217 break;
218 case ARPHRD_AX25:
219 rose_link_device_down(dev);
220 rose_rt_device_down(dev);
221 break;
222 }
223
224 return NOTIFY_DONE;
225 }
226
227 /*
228 * Add a socket to the bound sockets list.
229 */
rose_insert_socket(struct sock * sk)230 static void rose_insert_socket(struct sock *sk)
231 {
232
233 spin_lock_bh(&rose_list_lock);
234 sk_add_node(sk, &rose_list);
235 spin_unlock_bh(&rose_list_lock);
236 }
237
238 /*
239 * Find a socket that wants to accept the Call Request we just
240 * received.
241 */
rose_find_listener(rose_address * addr,ax25_address * call)242 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
243 {
244 struct sock *s;
245
246 spin_lock_bh(&rose_list_lock);
247 sk_for_each(s, &rose_list) {
248 struct rose_sock *rose = rose_sk(s);
249
250 if (!rosecmp(&rose->source_addr, addr) &&
251 !ax25cmp(&rose->source_call, call) &&
252 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
253 goto found;
254 }
255
256 sk_for_each(s, &rose_list) {
257 struct rose_sock *rose = rose_sk(s);
258
259 if (!rosecmp(&rose->source_addr, addr) &&
260 !ax25cmp(&rose->source_call, &null_ax25_address) &&
261 s->sk_state == TCP_LISTEN)
262 goto found;
263 }
264 s = NULL;
265 found:
266 spin_unlock_bh(&rose_list_lock);
267 return s;
268 }
269
270 /*
271 * Find a connected ROSE socket given my LCI and device.
272 */
rose_find_socket(unsigned int lci,struct rose_neigh * neigh)273 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
274 {
275 struct sock *s;
276
277 spin_lock_bh(&rose_list_lock);
278 sk_for_each(s, &rose_list) {
279 struct rose_sock *rose = rose_sk(s);
280
281 if (rose->lci == lci && rose->neighbour == neigh)
282 goto found;
283 }
284 s = NULL;
285 found:
286 spin_unlock_bh(&rose_list_lock);
287 return s;
288 }
289
290 /*
291 * Find a unique LCI for a given device.
292 */
rose_new_lci(struct rose_neigh * neigh)293 unsigned int rose_new_lci(struct rose_neigh *neigh)
294 {
295 int lci;
296
297 if (neigh->dce_mode) {
298 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
299 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
300 return lci;
301 } else {
302 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
303 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
304 return lci;
305 }
306
307 return 0;
308 }
309
310 /*
311 * Deferred destroy.
312 */
313 void rose_destroy_socket(struct sock *);
314
315 /*
316 * Handler for deferred kills.
317 */
rose_destroy_timer(struct timer_list * t)318 static void rose_destroy_timer(struct timer_list *t)
319 {
320 struct sock *sk = from_timer(sk, t, sk_timer);
321
322 rose_destroy_socket(sk);
323 }
324
325 /*
326 * This is called from user mode and the timers. Thus it protects itself
327 * against interrupt users but doesn't worry about being called during
328 * work. Once it is removed from the queue no interrupt or bottom half
329 * will touch it and we are (fairly 8-) ) safe.
330 */
rose_destroy_socket(struct sock * sk)331 void rose_destroy_socket(struct sock *sk)
332 {
333 struct sk_buff *skb;
334
335 rose_remove_socket(sk);
336 rose_stop_heartbeat(sk);
337 rose_stop_idletimer(sk);
338 rose_stop_timer(sk);
339
340 rose_clear_queues(sk); /* Flush the queues */
341
342 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
343 if (skb->sk != sk) { /* A pending connection */
344 /* Queue the unaccepted socket for death */
345 sock_set_flag(skb->sk, SOCK_DEAD);
346 rose_start_heartbeat(skb->sk);
347 rose_sk(skb->sk)->state = ROSE_STATE_0;
348 }
349
350 kfree_skb(skb);
351 }
352
353 if (sk_has_allocations(sk)) {
354 /* Defer: outstanding buffers */
355 timer_setup(&sk->sk_timer, rose_destroy_timer, 0);
356 sk->sk_timer.expires = jiffies + 10 * HZ;
357 add_timer(&sk->sk_timer);
358 } else
359 sock_put(sk);
360 }
361
362 /*
363 * Handling for system calls applied via the various interfaces to a
364 * ROSE socket object.
365 */
366
rose_setsockopt(struct socket * sock,int level,int optname,sockptr_t optval,unsigned int optlen)367 static int rose_setsockopt(struct socket *sock, int level, int optname,
368 sockptr_t optval, unsigned int optlen)
369 {
370 struct sock *sk = sock->sk;
371 struct rose_sock *rose = rose_sk(sk);
372 int opt;
373
374 if (level != SOL_ROSE)
375 return -ENOPROTOOPT;
376
377 if (optlen < sizeof(int))
378 return -EINVAL;
379
380 if (copy_from_sockptr(&opt, optval, sizeof(int)))
381 return -EFAULT;
382
383 switch (optname) {
384 case ROSE_DEFER:
385 rose->defer = opt ? 1 : 0;
386 return 0;
387
388 case ROSE_T1:
389 if (opt < 1)
390 return -EINVAL;
391 rose->t1 = opt * HZ;
392 return 0;
393
394 case ROSE_T2:
395 if (opt < 1)
396 return -EINVAL;
397 rose->t2 = opt * HZ;
398 return 0;
399
400 case ROSE_T3:
401 if (opt < 1)
402 return -EINVAL;
403 rose->t3 = opt * HZ;
404 return 0;
405
406 case ROSE_HOLDBACK:
407 if (opt < 1)
408 return -EINVAL;
409 rose->hb = opt * HZ;
410 return 0;
411
412 case ROSE_IDLE:
413 if (opt < 0)
414 return -EINVAL;
415 rose->idle = opt * 60 * HZ;
416 return 0;
417
418 case ROSE_QBITINCL:
419 rose->qbitincl = opt ? 1 : 0;
420 return 0;
421
422 default:
423 return -ENOPROTOOPT;
424 }
425 }
426
rose_getsockopt(struct socket * sock,int level,int optname,char __user * optval,int __user * optlen)427 static int rose_getsockopt(struct socket *sock, int level, int optname,
428 char __user *optval, int __user *optlen)
429 {
430 struct sock *sk = sock->sk;
431 struct rose_sock *rose = rose_sk(sk);
432 int val = 0;
433 int len;
434
435 if (level != SOL_ROSE)
436 return -ENOPROTOOPT;
437
438 if (get_user(len, optlen))
439 return -EFAULT;
440
441 if (len < 0)
442 return -EINVAL;
443
444 switch (optname) {
445 case ROSE_DEFER:
446 val = rose->defer;
447 break;
448
449 case ROSE_T1:
450 val = rose->t1 / HZ;
451 break;
452
453 case ROSE_T2:
454 val = rose->t2 / HZ;
455 break;
456
457 case ROSE_T3:
458 val = rose->t3 / HZ;
459 break;
460
461 case ROSE_HOLDBACK:
462 val = rose->hb / HZ;
463 break;
464
465 case ROSE_IDLE:
466 val = rose->idle / (60 * HZ);
467 break;
468
469 case ROSE_QBITINCL:
470 val = rose->qbitincl;
471 break;
472
473 default:
474 return -ENOPROTOOPT;
475 }
476
477 len = min_t(unsigned int, len, sizeof(int));
478
479 if (put_user(len, optlen))
480 return -EFAULT;
481
482 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
483 }
484
rose_listen(struct socket * sock,int backlog)485 static int rose_listen(struct socket *sock, int backlog)
486 {
487 struct sock *sk = sock->sk;
488
489 if (sk->sk_state != TCP_LISTEN) {
490 struct rose_sock *rose = rose_sk(sk);
491
492 rose->dest_ndigis = 0;
493 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
494 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
495 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
496 sk->sk_max_ack_backlog = backlog;
497 sk->sk_state = TCP_LISTEN;
498 return 0;
499 }
500
501 return -EOPNOTSUPP;
502 }
503
504 static struct proto rose_proto = {
505 .name = "ROSE",
506 .owner = THIS_MODULE,
507 .obj_size = sizeof(struct rose_sock),
508 };
509
rose_create(struct net * net,struct socket * sock,int protocol,int kern)510 static int rose_create(struct net *net, struct socket *sock, int protocol,
511 int kern)
512 {
513 struct sock *sk;
514 struct rose_sock *rose;
515
516 if (!net_eq(net, &init_net))
517 return -EAFNOSUPPORT;
518
519 if (sock->type != SOCK_SEQPACKET || protocol != 0)
520 return -ESOCKTNOSUPPORT;
521
522 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
523 if (sk == NULL)
524 return -ENOMEM;
525
526 rose = rose_sk(sk);
527
528 sock_init_data(sock, sk);
529
530 skb_queue_head_init(&rose->ack_queue);
531 #ifdef M_BIT
532 skb_queue_head_init(&rose->frag_queue);
533 rose->fraglen = 0;
534 #endif
535
536 sock->ops = &rose_proto_ops;
537 sk->sk_protocol = protocol;
538
539 timer_setup(&rose->timer, NULL, 0);
540 timer_setup(&rose->idletimer, NULL, 0);
541
542 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
543 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
544 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
545 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
546 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
547
548 rose->state = ROSE_STATE_0;
549
550 return 0;
551 }
552
rose_make_new(struct sock * osk)553 static struct sock *rose_make_new(struct sock *osk)
554 {
555 struct sock *sk;
556 struct rose_sock *rose, *orose;
557
558 if (osk->sk_type != SOCK_SEQPACKET)
559 return NULL;
560
561 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
562 if (sk == NULL)
563 return NULL;
564
565 rose = rose_sk(sk);
566
567 sock_init_data(NULL, sk);
568
569 skb_queue_head_init(&rose->ack_queue);
570 #ifdef M_BIT
571 skb_queue_head_init(&rose->frag_queue);
572 rose->fraglen = 0;
573 #endif
574
575 sk->sk_type = osk->sk_type;
576 sk->sk_priority = osk->sk_priority;
577 sk->sk_protocol = osk->sk_protocol;
578 sk->sk_rcvbuf = osk->sk_rcvbuf;
579 sk->sk_sndbuf = osk->sk_sndbuf;
580 sk->sk_state = TCP_ESTABLISHED;
581 sock_copy_flags(sk, osk);
582
583 timer_setup(&rose->timer, NULL, 0);
584 timer_setup(&rose->idletimer, NULL, 0);
585
586 orose = rose_sk(osk);
587 rose->t1 = orose->t1;
588 rose->t2 = orose->t2;
589 rose->t3 = orose->t3;
590 rose->hb = orose->hb;
591 rose->idle = orose->idle;
592 rose->defer = orose->defer;
593 rose->device = orose->device;
594 rose->qbitincl = orose->qbitincl;
595
596 return sk;
597 }
598
rose_release(struct socket * sock)599 static int rose_release(struct socket *sock)
600 {
601 struct sock *sk = sock->sk;
602 struct rose_sock *rose;
603
604 if (sk == NULL) return 0;
605
606 sock_hold(sk);
607 sock_orphan(sk);
608 lock_sock(sk);
609 rose = rose_sk(sk);
610
611 switch (rose->state) {
612 case ROSE_STATE_0:
613 release_sock(sk);
614 rose_disconnect(sk, 0, -1, -1);
615 lock_sock(sk);
616 rose_destroy_socket(sk);
617 break;
618
619 case ROSE_STATE_2:
620 rose->neighbour->use--;
621 release_sock(sk);
622 rose_disconnect(sk, 0, -1, -1);
623 lock_sock(sk);
624 rose_destroy_socket(sk);
625 break;
626
627 case ROSE_STATE_1:
628 case ROSE_STATE_3:
629 case ROSE_STATE_4:
630 case ROSE_STATE_5:
631 rose_clear_queues(sk);
632 rose_stop_idletimer(sk);
633 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
634 rose_start_t3timer(sk);
635 rose->state = ROSE_STATE_2;
636 sk->sk_state = TCP_CLOSE;
637 sk->sk_shutdown |= SEND_SHUTDOWN;
638 sk->sk_state_change(sk);
639 sock_set_flag(sk, SOCK_DEAD);
640 sock_set_flag(sk, SOCK_DESTROY);
641 break;
642
643 default:
644 break;
645 }
646
647 sock->sk = NULL;
648 release_sock(sk);
649 sock_put(sk);
650
651 return 0;
652 }
653
rose_bind(struct socket * sock,struct sockaddr * uaddr,int addr_len)654 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
655 {
656 struct sock *sk = sock->sk;
657 struct rose_sock *rose = rose_sk(sk);
658 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
659 struct net_device *dev;
660 ax25_address *source;
661 ax25_uid_assoc *user;
662 int n;
663
664 if (!sock_flag(sk, SOCK_ZAPPED))
665 return -EINVAL;
666
667 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
668 return -EINVAL;
669
670 if (addr->srose_family != AF_ROSE)
671 return -EINVAL;
672
673 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
674 return -EINVAL;
675
676 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
677 return -EINVAL;
678
679 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
680 return -EADDRNOTAVAIL;
681
682 source = &addr->srose_call;
683
684 user = ax25_findbyuid(current_euid());
685 if (user) {
686 rose->source_call = user->call;
687 ax25_uid_put(user);
688 } else {
689 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
690 dev_put(dev);
691 return -EACCES;
692 }
693 rose->source_call = *source;
694 }
695
696 rose->source_addr = addr->srose_addr;
697 rose->device = dev;
698 rose->source_ndigis = addr->srose_ndigis;
699
700 if (addr_len == sizeof(struct full_sockaddr_rose)) {
701 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
702 for (n = 0 ; n < addr->srose_ndigis ; n++)
703 rose->source_digis[n] = full_addr->srose_digis[n];
704 } else {
705 if (rose->source_ndigis == 1) {
706 rose->source_digis[0] = addr->srose_digi;
707 }
708 }
709
710 rose_insert_socket(sk);
711
712 sock_reset_flag(sk, SOCK_ZAPPED);
713
714 return 0;
715 }
716
rose_connect(struct socket * sock,struct sockaddr * uaddr,int addr_len,int flags)717 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
718 {
719 struct sock *sk = sock->sk;
720 struct rose_sock *rose = rose_sk(sk);
721 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
722 unsigned char cause, diagnostic;
723 struct net_device *dev;
724 ax25_uid_assoc *user;
725 int n, err = 0;
726
727 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
728 return -EINVAL;
729
730 if (addr->srose_family != AF_ROSE)
731 return -EINVAL;
732
733 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
734 return -EINVAL;
735
736 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
737 return -EINVAL;
738
739 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
740 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
741 return -EINVAL;
742
743 lock_sock(sk);
744
745 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
746 /* Connect completed during a ERESTARTSYS event */
747 sock->state = SS_CONNECTED;
748 goto out_release;
749 }
750
751 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
752 sock->state = SS_UNCONNECTED;
753 err = -ECONNREFUSED;
754 goto out_release;
755 }
756
757 if (sk->sk_state == TCP_ESTABLISHED) {
758 /* No reconnect on a seqpacket socket */
759 err = -EISCONN;
760 goto out_release;
761 }
762
763 sk->sk_state = TCP_CLOSE;
764 sock->state = SS_UNCONNECTED;
765
766 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
767 &diagnostic, 0);
768 if (!rose->neighbour) {
769 err = -ENETUNREACH;
770 goto out_release;
771 }
772
773 rose->lci = rose_new_lci(rose->neighbour);
774 if (!rose->lci) {
775 err = -ENETUNREACH;
776 goto out_release;
777 }
778
779 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
780 sock_reset_flag(sk, SOCK_ZAPPED);
781
782 if ((dev = rose_dev_first()) == NULL) {
783 err = -ENETUNREACH;
784 goto out_release;
785 }
786
787 user = ax25_findbyuid(current_euid());
788 if (!user) {
789 err = -EINVAL;
790 goto out_release;
791 }
792
793 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
794 rose->source_call = user->call;
795 rose->device = dev;
796 ax25_uid_put(user);
797
798 rose_insert_socket(sk); /* Finish the bind */
799 }
800 rose->dest_addr = addr->srose_addr;
801 rose->dest_call = addr->srose_call;
802 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
803 rose->dest_ndigis = addr->srose_ndigis;
804
805 if (addr_len == sizeof(struct full_sockaddr_rose)) {
806 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
807 for (n = 0 ; n < addr->srose_ndigis ; n++)
808 rose->dest_digis[n] = full_addr->srose_digis[n];
809 } else {
810 if (rose->dest_ndigis == 1) {
811 rose->dest_digis[0] = addr->srose_digi;
812 }
813 }
814
815 /* Move to connecting socket, start sending Connect Requests */
816 sock->state = SS_CONNECTING;
817 sk->sk_state = TCP_SYN_SENT;
818
819 rose->state = ROSE_STATE_1;
820
821 rose->neighbour->use++;
822
823 rose_write_internal(sk, ROSE_CALL_REQUEST);
824 rose_start_heartbeat(sk);
825 rose_start_t1timer(sk);
826
827 /* Now the loop */
828 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
829 err = -EINPROGRESS;
830 goto out_release;
831 }
832
833 /*
834 * A Connect Ack with Choke or timeout or failed routing will go to
835 * closed.
836 */
837 if (sk->sk_state == TCP_SYN_SENT) {
838 DEFINE_WAIT(wait);
839
840 for (;;) {
841 prepare_to_wait(sk_sleep(sk), &wait,
842 TASK_INTERRUPTIBLE);
843 if (sk->sk_state != TCP_SYN_SENT)
844 break;
845 if (!signal_pending(current)) {
846 release_sock(sk);
847 schedule();
848 lock_sock(sk);
849 continue;
850 }
851 err = -ERESTARTSYS;
852 break;
853 }
854 finish_wait(sk_sleep(sk), &wait);
855
856 if (err)
857 goto out_release;
858 }
859
860 if (sk->sk_state != TCP_ESTABLISHED) {
861 sock->state = SS_UNCONNECTED;
862 err = sock_error(sk); /* Always set at this point */
863 goto out_release;
864 }
865
866 sock->state = SS_CONNECTED;
867
868 out_release:
869 release_sock(sk);
870
871 return err;
872 }
873
rose_accept(struct socket * sock,struct socket * newsock,int flags,bool kern)874 static int rose_accept(struct socket *sock, struct socket *newsock, int flags,
875 bool kern)
876 {
877 struct sk_buff *skb;
878 struct sock *newsk;
879 DEFINE_WAIT(wait);
880 struct sock *sk;
881 int err = 0;
882
883 if ((sk = sock->sk) == NULL)
884 return -EINVAL;
885
886 lock_sock(sk);
887 if (sk->sk_type != SOCK_SEQPACKET) {
888 err = -EOPNOTSUPP;
889 goto out_release;
890 }
891
892 if (sk->sk_state != TCP_LISTEN) {
893 err = -EINVAL;
894 goto out_release;
895 }
896
897 /*
898 * The write queue this time is holding sockets ready to use
899 * hooked into the SABM we saved
900 */
901 for (;;) {
902 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
903
904 skb = skb_dequeue(&sk->sk_receive_queue);
905 if (skb)
906 break;
907
908 if (flags & O_NONBLOCK) {
909 err = -EWOULDBLOCK;
910 break;
911 }
912 if (!signal_pending(current)) {
913 release_sock(sk);
914 schedule();
915 lock_sock(sk);
916 continue;
917 }
918 err = -ERESTARTSYS;
919 break;
920 }
921 finish_wait(sk_sleep(sk), &wait);
922 if (err)
923 goto out_release;
924
925 newsk = skb->sk;
926 sock_graft(newsk, newsock);
927
928 /* Now attach up the new socket */
929 skb->sk = NULL;
930 kfree_skb(skb);
931 sk_acceptq_removed(sk);
932
933 out_release:
934 release_sock(sk);
935
936 return err;
937 }
938
rose_getname(struct socket * sock,struct sockaddr * uaddr,int peer)939 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
940 int peer)
941 {
942 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
943 struct sock *sk = sock->sk;
944 struct rose_sock *rose = rose_sk(sk);
945 int n;
946
947 memset(srose, 0, sizeof(*srose));
948 if (peer != 0) {
949 if (sk->sk_state != TCP_ESTABLISHED)
950 return -ENOTCONN;
951 srose->srose_family = AF_ROSE;
952 srose->srose_addr = rose->dest_addr;
953 srose->srose_call = rose->dest_call;
954 srose->srose_ndigis = rose->dest_ndigis;
955 for (n = 0; n < rose->dest_ndigis; n++)
956 srose->srose_digis[n] = rose->dest_digis[n];
957 } else {
958 srose->srose_family = AF_ROSE;
959 srose->srose_addr = rose->source_addr;
960 srose->srose_call = rose->source_call;
961 srose->srose_ndigis = rose->source_ndigis;
962 for (n = 0; n < rose->source_ndigis; n++)
963 srose->srose_digis[n] = rose->source_digis[n];
964 }
965
966 return sizeof(struct full_sockaddr_rose);
967 }
968
rose_rx_call_request(struct sk_buff * skb,struct net_device * dev,struct rose_neigh * neigh,unsigned int lci)969 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
970 {
971 struct sock *sk;
972 struct sock *make;
973 struct rose_sock *make_rose;
974 struct rose_facilities_struct facilities;
975 int n;
976
977 skb->sk = NULL; /* Initially we don't know who it's for */
978
979 /*
980 * skb->data points to the rose frame start
981 */
982 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
983
984 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
985 skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
986 &facilities)) {
987 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
988 return 0;
989 }
990
991 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
992
993 /*
994 * We can't accept the Call Request.
995 */
996 if (sk == NULL || sk_acceptq_is_full(sk) ||
997 (make = rose_make_new(sk)) == NULL) {
998 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
999 return 0;
1000 }
1001
1002 skb->sk = make;
1003 make->sk_state = TCP_ESTABLISHED;
1004 make_rose = rose_sk(make);
1005
1006 make_rose->lci = lci;
1007 make_rose->dest_addr = facilities.dest_addr;
1008 make_rose->dest_call = facilities.dest_call;
1009 make_rose->dest_ndigis = facilities.dest_ndigis;
1010 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1011 make_rose->dest_digis[n] = facilities.dest_digis[n];
1012 make_rose->source_addr = facilities.source_addr;
1013 make_rose->source_call = facilities.source_call;
1014 make_rose->source_ndigis = facilities.source_ndigis;
1015 for (n = 0 ; n < facilities.source_ndigis ; n++)
1016 make_rose->source_digis[n] = facilities.source_digis[n];
1017 make_rose->neighbour = neigh;
1018 make_rose->device = dev;
1019 make_rose->facilities = facilities;
1020
1021 make_rose->neighbour->use++;
1022
1023 if (rose_sk(sk)->defer) {
1024 make_rose->state = ROSE_STATE_5;
1025 } else {
1026 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1027 make_rose->state = ROSE_STATE_3;
1028 rose_start_idletimer(make);
1029 }
1030
1031 make_rose->condition = 0x00;
1032 make_rose->vs = 0;
1033 make_rose->va = 0;
1034 make_rose->vr = 0;
1035 make_rose->vl = 0;
1036 sk_acceptq_added(sk);
1037
1038 rose_insert_socket(make);
1039
1040 skb_queue_head(&sk->sk_receive_queue, skb);
1041
1042 rose_start_heartbeat(make);
1043
1044 if (!sock_flag(sk, SOCK_DEAD))
1045 sk->sk_data_ready(sk);
1046
1047 return 1;
1048 }
1049
rose_sendmsg(struct socket * sock,struct msghdr * msg,size_t len)1050 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1051 {
1052 struct sock *sk = sock->sk;
1053 struct rose_sock *rose = rose_sk(sk);
1054 DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, 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 /* Build a packet */
1106 /* Sanity check the packet size */
1107 if (len > 65535)
1108 return -EMSGSIZE;
1109
1110 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1111
1112 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1113 return err;
1114
1115 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1116
1117 /*
1118 * Put the data on the end
1119 */
1120
1121 skb_reset_transport_header(skb);
1122 skb_put(skb, len);
1123
1124 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
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 /* Build a ROSE Network header */
1145 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1146 asmptr[1] = (rose->lci >> 0) & 0xFF;
1147 asmptr[2] = ROSE_DATA;
1148
1149 if (qbit)
1150 asmptr[0] |= ROSE_Q_BIT;
1151
1152 if (sk->sk_state != TCP_ESTABLISHED) {
1153 kfree_skb(skb);
1154 return -ENOTCONN;
1155 }
1156
1157 #ifdef M_BIT
1158 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1159 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1160 unsigned char header[ROSE_MIN_LEN];
1161 struct sk_buff *skbn;
1162 int frontlen;
1163 int lg;
1164
1165 /* Save a copy of the Header */
1166 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1167 skb_pull(skb, ROSE_MIN_LEN);
1168
1169 frontlen = skb_headroom(skb);
1170
1171 while (skb->len > 0) {
1172 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1173 kfree_skb(skb);
1174 return err;
1175 }
1176
1177 skbn->sk = sk;
1178 skbn->free = 1;
1179 skbn->arp = 1;
1180
1181 skb_reserve(skbn, frontlen);
1182
1183 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1184
1185 /* Copy the user data */
1186 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1187 skb_pull(skb, lg);
1188
1189 /* Duplicate the Header */
1190 skb_push(skbn, ROSE_MIN_LEN);
1191 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1192
1193 if (skb->len > 0)
1194 skbn->data[2] |= M_BIT;
1195
1196 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1197 }
1198
1199 skb->free = 1;
1200 kfree_skb(skb);
1201 } else {
1202 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1203 }
1204 #else
1205 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1206 #endif
1207
1208 rose_kick(sk);
1209
1210 return len;
1211 }
1212
1213
rose_recvmsg(struct socket * sock,struct msghdr * msg,size_t size,int flags)1214 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1215 int flags)
1216 {
1217 struct sock *sk = sock->sk;
1218 struct rose_sock *rose = rose_sk(sk);
1219 size_t copied;
1220 unsigned char *asmptr;
1221 struct sk_buff *skb;
1222 int n, er, qbit;
1223
1224 /*
1225 * This works for seqpacket too. The receiver has ordered the queue for
1226 * us! We do one quick check first though
1227 */
1228 if (sk->sk_state != TCP_ESTABLISHED)
1229 return -ENOTCONN;
1230
1231 /* Now we can treat all alike */
1232 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1233 return er;
1234
1235 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1236
1237 skb_pull(skb, ROSE_MIN_LEN);
1238
1239 if (rose->qbitincl) {
1240 asmptr = skb_push(skb, 1);
1241 *asmptr = qbit;
1242 }
1243
1244 skb_reset_transport_header(skb);
1245 copied = skb->len;
1246
1247 if (copied > size) {
1248 copied = size;
1249 msg->msg_flags |= MSG_TRUNC;
1250 }
1251
1252 skb_copy_datagram_msg(skb, 0, msg, copied);
1253
1254 if (msg->msg_name) {
1255 struct sockaddr_rose *srose;
1256 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1257 msg->msg_name);
1258
1259 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1260 srose = msg->msg_name;
1261 srose->srose_family = AF_ROSE;
1262 srose->srose_addr = rose->dest_addr;
1263 srose->srose_call = rose->dest_call;
1264 srose->srose_ndigis = rose->dest_ndigis;
1265 for (n = 0 ; n < rose->dest_ndigis ; n++)
1266 full_srose->srose_digis[n] = rose->dest_digis[n];
1267 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1268 }
1269
1270 skb_free_datagram(sk, skb);
1271
1272 return copied;
1273 }
1274
1275
rose_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)1276 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1277 {
1278 struct sock *sk = sock->sk;
1279 struct rose_sock *rose = rose_sk(sk);
1280 void __user *argp = (void __user *)arg;
1281
1282 switch (cmd) {
1283 case TIOCOUTQ: {
1284 long amount;
1285
1286 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1287 if (amount < 0)
1288 amount = 0;
1289 return put_user(amount, (unsigned int __user *) argp);
1290 }
1291
1292 case TIOCINQ: {
1293 struct sk_buff *skb;
1294 long amount = 0L;
1295 /* These two are safe on a single CPU system as only user tasks fiddle here */
1296 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1297 amount = skb->len;
1298 return put_user(amount, (unsigned int __user *) argp);
1299 }
1300
1301 case SIOCGIFADDR:
1302 case SIOCSIFADDR:
1303 case SIOCGIFDSTADDR:
1304 case SIOCSIFDSTADDR:
1305 case SIOCGIFBRDADDR:
1306 case SIOCSIFBRDADDR:
1307 case SIOCGIFNETMASK:
1308 case SIOCSIFNETMASK:
1309 case SIOCGIFMETRIC:
1310 case SIOCSIFMETRIC:
1311 return -EINVAL;
1312
1313 case SIOCADDRT:
1314 case SIOCDELRT:
1315 case SIOCRSCLRRT:
1316 if (!capable(CAP_NET_ADMIN))
1317 return -EPERM;
1318 return rose_rt_ioctl(cmd, argp);
1319
1320 case SIOCRSGCAUSE: {
1321 struct rose_cause_struct rose_cause;
1322 rose_cause.cause = rose->cause;
1323 rose_cause.diagnostic = rose->diagnostic;
1324 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1325 }
1326
1327 case SIOCRSSCAUSE: {
1328 struct rose_cause_struct rose_cause;
1329 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1330 return -EFAULT;
1331 rose->cause = rose_cause.cause;
1332 rose->diagnostic = rose_cause.diagnostic;
1333 return 0;
1334 }
1335
1336 case SIOCRSSL2CALL:
1337 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1338 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1339 ax25_listen_release(&rose_callsign, NULL);
1340 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1341 return -EFAULT;
1342 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1343 return ax25_listen_register(&rose_callsign, NULL);
1344
1345 return 0;
1346
1347 case SIOCRSGL2CALL:
1348 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1349
1350 case SIOCRSACCEPT:
1351 if (rose->state == ROSE_STATE_5) {
1352 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1353 rose_start_idletimer(sk);
1354 rose->condition = 0x00;
1355 rose->vs = 0;
1356 rose->va = 0;
1357 rose->vr = 0;
1358 rose->vl = 0;
1359 rose->state = ROSE_STATE_3;
1360 }
1361 return 0;
1362
1363 default:
1364 return -ENOIOCTLCMD;
1365 }
1366
1367 return 0;
1368 }
1369
1370 #ifdef CONFIG_PROC_FS
rose_info_start(struct seq_file * seq,loff_t * pos)1371 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1372 __acquires(rose_list_lock)
1373 {
1374 spin_lock_bh(&rose_list_lock);
1375 return seq_hlist_start_head(&rose_list, *pos);
1376 }
1377
rose_info_next(struct seq_file * seq,void * v,loff_t * pos)1378 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1379 {
1380 return seq_hlist_next(v, &rose_list, pos);
1381 }
1382
rose_info_stop(struct seq_file * seq,void * v)1383 static void rose_info_stop(struct seq_file *seq, void *v)
1384 __releases(rose_list_lock)
1385 {
1386 spin_unlock_bh(&rose_list_lock);
1387 }
1388
rose_info_show(struct seq_file * seq,void * v)1389 static int rose_info_show(struct seq_file *seq, void *v)
1390 {
1391 char buf[11], rsbuf[11];
1392
1393 if (v == SEQ_START_TOKEN)
1394 seq_puts(seq,
1395 "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");
1396
1397 else {
1398 struct sock *s = sk_entry(v);
1399 struct rose_sock *rose = rose_sk(s);
1400 const char *devname, *callsign;
1401 const struct net_device *dev = rose->device;
1402
1403 if (!dev)
1404 devname = "???";
1405 else
1406 devname = dev->name;
1407
1408 seq_printf(seq, "%-10s %-9s ",
1409 rose2asc(rsbuf, &rose->dest_addr),
1410 ax2asc(buf, &rose->dest_call));
1411
1412 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1413 callsign = "??????-?";
1414 else
1415 callsign = ax2asc(buf, &rose->source_call);
1416
1417 seq_printf(seq,
1418 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1419 rose2asc(rsbuf, &rose->source_addr),
1420 callsign,
1421 devname,
1422 rose->lci & 0x0FFF,
1423 (rose->neighbour) ? rose->neighbour->number : 0,
1424 rose->state,
1425 rose->vs,
1426 rose->vr,
1427 rose->va,
1428 ax25_display_timer(&rose->timer) / HZ,
1429 rose->t1 / HZ,
1430 rose->t2 / HZ,
1431 rose->t3 / HZ,
1432 rose->hb / HZ,
1433 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1434 rose->idle / (60 * HZ),
1435 sk_wmem_alloc_get(s),
1436 sk_rmem_alloc_get(s),
1437 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1438 }
1439
1440 return 0;
1441 }
1442
1443 static const struct seq_operations rose_info_seqops = {
1444 .start = rose_info_start,
1445 .next = rose_info_next,
1446 .stop = rose_info_stop,
1447 .show = rose_info_show,
1448 };
1449 #endif /* CONFIG_PROC_FS */
1450
1451 static const struct net_proto_family rose_family_ops = {
1452 .family = PF_ROSE,
1453 .create = rose_create,
1454 .owner = THIS_MODULE,
1455 };
1456
1457 static const struct proto_ops rose_proto_ops = {
1458 .family = PF_ROSE,
1459 .owner = THIS_MODULE,
1460 .release = rose_release,
1461 .bind = rose_bind,
1462 .connect = rose_connect,
1463 .socketpair = sock_no_socketpair,
1464 .accept = rose_accept,
1465 .getname = rose_getname,
1466 .poll = datagram_poll,
1467 .ioctl = rose_ioctl,
1468 .gettstamp = sock_gettstamp,
1469 .listen = rose_listen,
1470 .shutdown = sock_no_shutdown,
1471 .setsockopt = rose_setsockopt,
1472 .getsockopt = rose_getsockopt,
1473 .sendmsg = rose_sendmsg,
1474 .recvmsg = rose_recvmsg,
1475 .mmap = sock_no_mmap,
1476 .sendpage = sock_no_sendpage,
1477 };
1478
1479 static struct notifier_block rose_dev_notifier = {
1480 .notifier_call = rose_device_event,
1481 };
1482
1483 static struct net_device **dev_rose;
1484
1485 static struct ax25_protocol rose_pid = {
1486 .pid = AX25_P_ROSE,
1487 .func = rose_route_frame
1488 };
1489
1490 static struct ax25_linkfail rose_linkfail_notifier = {
1491 .func = rose_link_failed
1492 };
1493
rose_proto_init(void)1494 static int __init rose_proto_init(void)
1495 {
1496 int i;
1497 int rc;
1498
1499 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1500 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter too large\n");
1501 rc = -EINVAL;
1502 goto out;
1503 }
1504
1505 rc = proto_register(&rose_proto, 0);
1506 if (rc != 0)
1507 goto out;
1508
1509 rose_callsign = null_ax25_address;
1510
1511 dev_rose = kcalloc(rose_ndevs, sizeof(struct net_device *),
1512 GFP_KERNEL);
1513 if (dev_rose == NULL) {
1514 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1515 rc = -ENOMEM;
1516 goto out_proto_unregister;
1517 }
1518
1519 for (i = 0; i < rose_ndevs; i++) {
1520 struct net_device *dev;
1521 char name[IFNAMSIZ];
1522
1523 sprintf(name, "rose%d", i);
1524 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1525 if (!dev) {
1526 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1527 rc = -ENOMEM;
1528 goto fail;
1529 }
1530 rc = register_netdev(dev);
1531 if (rc) {
1532 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1533 free_netdev(dev);
1534 goto fail;
1535 }
1536 rose_set_lockdep_key(dev);
1537 dev_rose[i] = dev;
1538 }
1539
1540 sock_register(&rose_family_ops);
1541 register_netdevice_notifier(&rose_dev_notifier);
1542
1543 ax25_register_pid(&rose_pid);
1544 ax25_linkfail_register(&rose_linkfail_notifier);
1545
1546 #ifdef CONFIG_SYSCTL
1547 rose_register_sysctl();
1548 #endif
1549 rose_loopback_init();
1550
1551 rose_add_loopback_neigh();
1552
1553 proc_create_seq("rose", 0444, init_net.proc_net, &rose_info_seqops);
1554 proc_create_seq("rose_neigh", 0444, init_net.proc_net,
1555 &rose_neigh_seqops);
1556 proc_create_seq("rose_nodes", 0444, init_net.proc_net,
1557 &rose_node_seqops);
1558 proc_create_seq("rose_routes", 0444, init_net.proc_net,
1559 &rose_route_seqops);
1560 out:
1561 return rc;
1562 fail:
1563 while (--i >= 0) {
1564 unregister_netdev(dev_rose[i]);
1565 free_netdev(dev_rose[i]);
1566 }
1567 kfree(dev_rose);
1568 out_proto_unregister:
1569 proto_unregister(&rose_proto);
1570 goto out;
1571 }
1572 module_init(rose_proto_init);
1573
1574 module_param(rose_ndevs, int, 0);
1575 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1576
1577 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1578 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1579 MODULE_LICENSE("GPL");
1580 MODULE_ALIAS_NETPROTO(PF_ROSE);
1581
rose_exit(void)1582 static void __exit rose_exit(void)
1583 {
1584 int i;
1585
1586 remove_proc_entry("rose", init_net.proc_net);
1587 remove_proc_entry("rose_neigh", init_net.proc_net);
1588 remove_proc_entry("rose_nodes", init_net.proc_net);
1589 remove_proc_entry("rose_routes", init_net.proc_net);
1590 rose_loopback_clear();
1591
1592 rose_rt_free();
1593
1594 ax25_protocol_release(AX25_P_ROSE);
1595 ax25_linkfail_release(&rose_linkfail_notifier);
1596
1597 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1598 ax25_listen_release(&rose_callsign, NULL);
1599
1600 #ifdef CONFIG_SYSCTL
1601 rose_unregister_sysctl();
1602 #endif
1603 unregister_netdevice_notifier(&rose_dev_notifier);
1604
1605 sock_unregister(PF_ROSE);
1606
1607 for (i = 0; i < rose_ndevs; i++) {
1608 struct net_device *dev = dev_rose[i];
1609
1610 if (dev) {
1611 unregister_netdev(dev);
1612 free_netdev(dev);
1613 }
1614 }
1615
1616 kfree(dev_rose);
1617 proto_unregister(&rose_proto);
1618 }
1619
1620 module_exit(rose_exit);
1621