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 */
12
13 #include <linux/capability.h>
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/slab.h>
22 #include <linux/kernel.h>
23 #include <linux/sched/signal.h>
24 #include <linux/spinlock.h>
25 #include <linux/timer.h>
26 #include <linux/string.h>
27 #include <linux/sockios.h>
28 #include <linux/net.h>
29 #include <linux/stat.h>
30 #include <net/net_namespace.h>
31 #include <net/ax25.h>
32 #include <linux/inet.h>
33 #include <linux/netdevice.h>
34 #include <linux/if_arp.h>
35 #include <linux/skbuff.h>
36 #include <net/sock.h>
37 #include <linux/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>
46 #include <net/tcp_states.h>
47 #include <net/ip.h>
48 #include <net/arp.h>
49
50 static int rose_ndevs = 10;
51
52 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
53 int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
54 int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
55 int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
56 int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
57 int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
58 int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
59 int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
60 int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
61 int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
62
63 static HLIST_HEAD(rose_list);
64 static DEFINE_SPINLOCK(rose_list_lock);
65
66 static const struct proto_ops rose_proto_ops;
67
68 ax25_address rose_callsign;
69
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 */
76 static struct lock_class_key rose_netdev_xmit_lock_key;
77 static struct lock_class_key rose_netdev_addr_lock_key;
78
rose_set_lockdep_one(struct net_device * dev,struct netdev_queue * txq,void * _unused)79 static void rose_set_lockdep_one(struct net_device *dev,
80 struct netdev_queue *txq,
81 void *_unused)
82 {
83 lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
84 }
85
rose_set_lockdep_key(struct net_device * dev)86 static void rose_set_lockdep_key(struct net_device *dev)
87 {
88 lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
89 netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
90 }
91
92 /*
93 * Convert a ROSE address into text.
94 */
rose2asc(char * buf,const rose_address * addr)95 char *rose2asc(char *buf, const rose_address *addr)
96 {
97 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
98 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
99 addr->rose_addr[4] == 0x00) {
100 strcpy(buf, "*");
101 } else {
102 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
103 addr->rose_addr[1] & 0xFF,
104 addr->rose_addr[2] & 0xFF,
105 addr->rose_addr[3] & 0xFF,
106 addr->rose_addr[4] & 0xFF);
107 }
108
109 return buf;
110 }
111
112 /*
113 * Compare two ROSE addresses, 0 == equal.
114 */
rosecmp(rose_address * addr1,rose_address * addr2)115 int rosecmp(rose_address *addr1, rose_address *addr2)
116 {
117 int i;
118
119 for (i = 0; i < 5; i++)
120 if (addr1->rose_addr[i] != addr2->rose_addr[i])
121 return 1;
122
123 return 0;
124 }
125
126 /*
127 * Compare two ROSE addresses for only mask digits, 0 == equal.
128 */
rosecmpm(rose_address * addr1,rose_address * addr2,unsigned short mask)129 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
130 {
131 unsigned int i, j;
132
133 if (mask > 10)
134 return 1;
135
136 for (i = 0; i < mask; i++) {
137 j = i / 2;
138
139 if ((i % 2) != 0) {
140 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
141 return 1;
142 } else {
143 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
144 return 1;
145 }
146 }
147
148 return 0;
149 }
150
151 /*
152 * Socket removal during an interrupt is now safe.
153 */
rose_remove_socket(struct sock * sk)154 static void rose_remove_socket(struct sock *sk)
155 {
156 spin_lock_bh(&rose_list_lock);
157 sk_del_node_init(sk);
158 spin_unlock_bh(&rose_list_lock);
159 }
160
161 /*
162 * Kill all bound sockets on a broken link layer connection to a
163 * particular neighbour.
164 */
rose_kill_by_neigh(struct rose_neigh * neigh)165 void rose_kill_by_neigh(struct rose_neigh *neigh)
166 {
167 struct sock *s;
168
169 spin_lock_bh(&rose_list_lock);
170 sk_for_each(s, &rose_list) {
171 struct rose_sock *rose = rose_sk(s);
172
173 if (rose->neighbour == neigh) {
174 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
175 rose->neighbour->use--;
176 rose->neighbour = NULL;
177 }
178 }
179 spin_unlock_bh(&rose_list_lock);
180 }
181
182 /*
183 * Kill all bound sockets on a dropped device.
184 */
rose_kill_by_device(struct net_device * dev)185 static void rose_kill_by_device(struct net_device *dev)
186 {
187 struct sock *s;
188
189 spin_lock_bh(&rose_list_lock);
190 sk_for_each(s, &rose_list) {
191 struct rose_sock *rose = rose_sk(s);
192
193 if (rose->device == dev) {
194 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
195 if (rose->neighbour)
196 rose->neighbour->use--;
197 rose->device = NULL;
198 }
199 }
200 spin_unlock_bh(&rose_list_lock);
201 }
202
203 /*
204 * Handle device status changes.
205 */
rose_device_event(struct notifier_block * this,unsigned long event,void * ptr)206 static int rose_device_event(struct notifier_block *this,
207 unsigned long event, void *ptr)
208 {
209 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
210
211 if (!net_eq(dev_net(dev), &init_net))
212 return NOTIFY_DONE;
213
214 if (event != NETDEV_DOWN)
215 return NOTIFY_DONE;
216
217 switch (dev->type) {
218 case ARPHRD_ROSE:
219 rose_kill_by_device(dev);
220 break;
221 case ARPHRD_AX25:
222 rose_link_device_down(dev);
223 rose_rt_device_down(dev);
224 break;
225 }
226
227 return NOTIFY_DONE;
228 }
229
230 /*
231 * Add a socket to the bound sockets list.
232 */
rose_insert_socket(struct sock * sk)233 static void rose_insert_socket(struct sock *sk)
234 {
235
236 spin_lock_bh(&rose_list_lock);
237 sk_add_node(sk, &rose_list);
238 spin_unlock_bh(&rose_list_lock);
239 }
240
241 /*
242 * Find a socket that wants to accept the Call Request we just
243 * received.
244 */
rose_find_listener(rose_address * addr,ax25_address * call)245 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
246 {
247 struct sock *s;
248
249 spin_lock_bh(&rose_list_lock);
250 sk_for_each(s, &rose_list) {
251 struct rose_sock *rose = rose_sk(s);
252
253 if (!rosecmp(&rose->source_addr, addr) &&
254 !ax25cmp(&rose->source_call, call) &&
255 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
256 goto found;
257 }
258
259 sk_for_each(s, &rose_list) {
260 struct rose_sock *rose = rose_sk(s);
261
262 if (!rosecmp(&rose->source_addr, addr) &&
263 !ax25cmp(&rose->source_call, &null_ax25_address) &&
264 s->sk_state == TCP_LISTEN)
265 goto found;
266 }
267 s = NULL;
268 found:
269 spin_unlock_bh(&rose_list_lock);
270 return s;
271 }
272
273 /*
274 * Find a connected ROSE socket given my LCI and device.
275 */
rose_find_socket(unsigned int lci,struct rose_neigh * neigh)276 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
277 {
278 struct sock *s;
279
280 spin_lock_bh(&rose_list_lock);
281 sk_for_each(s, &rose_list) {
282 struct rose_sock *rose = rose_sk(s);
283
284 if (rose->lci == lci && rose->neighbour == neigh)
285 goto found;
286 }
287 s = NULL;
288 found:
289 spin_unlock_bh(&rose_list_lock);
290 return s;
291 }
292
293 /*
294 * Find a unique LCI for a given device.
295 */
rose_new_lci(struct rose_neigh * neigh)296 unsigned int rose_new_lci(struct rose_neigh *neigh)
297 {
298 int lci;
299
300 if (neigh->dce_mode) {
301 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
302 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
303 return lci;
304 } else {
305 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
306 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
307 return lci;
308 }
309
310 return 0;
311 }
312
313 /*
314 * Deferred destroy.
315 */
316 void rose_destroy_socket(struct sock *);
317
318 /*
319 * Handler for deferred kills.
320 */
rose_destroy_timer(struct timer_list * t)321 static void rose_destroy_timer(struct timer_list *t)
322 {
323 struct sock *sk = from_timer(sk, t, sk_timer);
324
325 rose_destroy_socket(sk);
326 }
327
328 /*
329 * This is called from user mode and the timers. Thus it protects itself
330 * against interrupt users but doesn't worry about being called during
331 * work. Once it is removed from the queue no interrupt or bottom half
332 * will touch it and we are (fairly 8-) ) safe.
333 */
rose_destroy_socket(struct sock * sk)334 void rose_destroy_socket(struct sock *sk)
335 {
336 struct sk_buff *skb;
337
338 rose_remove_socket(sk);
339 rose_stop_heartbeat(sk);
340 rose_stop_idletimer(sk);
341 rose_stop_timer(sk);
342
343 rose_clear_queues(sk); /* Flush the queues */
344
345 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
346 if (skb->sk != sk) { /* A pending connection */
347 /* Queue the unaccepted socket for death */
348 sock_set_flag(skb->sk, SOCK_DEAD);
349 rose_start_heartbeat(skb->sk);
350 rose_sk(skb->sk)->state = ROSE_STATE_0;
351 }
352
353 kfree_skb(skb);
354 }
355
356 if (sk_has_allocations(sk)) {
357 /* Defer: outstanding buffers */
358 timer_setup(&sk->sk_timer, rose_destroy_timer, 0);
359 sk->sk_timer.expires = jiffies + 10 * HZ;
360 add_timer(&sk->sk_timer);
361 } else
362 sock_put(sk);
363 }
364
365 /*
366 * Handling for system calls applied via the various interfaces to a
367 * ROSE socket object.
368 */
369
rose_setsockopt(struct socket * sock,int level,int optname,char __user * optval,unsigned int optlen)370 static int rose_setsockopt(struct socket *sock, int level, int optname,
371 char __user *optval, unsigned int optlen)
372 {
373 struct sock *sk = sock->sk;
374 struct rose_sock *rose = rose_sk(sk);
375 int opt;
376
377 if (level != SOL_ROSE)
378 return -ENOPROTOOPT;
379
380 if (optlen < sizeof(int))
381 return -EINVAL;
382
383 if (get_user(opt, (int __user *)optval))
384 return -EFAULT;
385
386 switch (optname) {
387 case ROSE_DEFER:
388 rose->defer = opt ? 1 : 0;
389 return 0;
390
391 case ROSE_T1:
392 if (opt < 1)
393 return -EINVAL;
394 rose->t1 = opt * HZ;
395 return 0;
396
397 case ROSE_T2:
398 if (opt < 1)
399 return -EINVAL;
400 rose->t2 = opt * HZ;
401 return 0;
402
403 case ROSE_T3:
404 if (opt < 1)
405 return -EINVAL;
406 rose->t3 = opt * HZ;
407 return 0;
408
409 case ROSE_HOLDBACK:
410 if (opt < 1)
411 return -EINVAL;
412 rose->hb = opt * HZ;
413 return 0;
414
415 case ROSE_IDLE:
416 if (opt < 0)
417 return -EINVAL;
418 rose->idle = opt * 60 * HZ;
419 return 0;
420
421 case ROSE_QBITINCL:
422 rose->qbitincl = opt ? 1 : 0;
423 return 0;
424
425 default:
426 return -ENOPROTOOPT;
427 }
428 }
429
rose_getsockopt(struct socket * sock,int level,int optname,char __user * optval,int __user * optlen)430 static int rose_getsockopt(struct socket *sock, int level, int optname,
431 char __user *optval, int __user *optlen)
432 {
433 struct sock *sk = sock->sk;
434 struct rose_sock *rose = rose_sk(sk);
435 int val = 0;
436 int len;
437
438 if (level != SOL_ROSE)
439 return -ENOPROTOOPT;
440
441 if (get_user(len, optlen))
442 return -EFAULT;
443
444 if (len < 0)
445 return -EINVAL;
446
447 switch (optname) {
448 case ROSE_DEFER:
449 val = rose->defer;
450 break;
451
452 case ROSE_T1:
453 val = rose->t1 / HZ;
454 break;
455
456 case ROSE_T2:
457 val = rose->t2 / HZ;
458 break;
459
460 case ROSE_T3:
461 val = rose->t3 / HZ;
462 break;
463
464 case ROSE_HOLDBACK:
465 val = rose->hb / HZ;
466 break;
467
468 case ROSE_IDLE:
469 val = rose->idle / (60 * HZ);
470 break;
471
472 case ROSE_QBITINCL:
473 val = rose->qbitincl;
474 break;
475
476 default:
477 return -ENOPROTOOPT;
478 }
479
480 len = min_t(unsigned int, len, sizeof(int));
481
482 if (put_user(len, optlen))
483 return -EFAULT;
484
485 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
486 }
487
rose_listen(struct socket * sock,int backlog)488 static int rose_listen(struct socket *sock, int backlog)
489 {
490 struct sock *sk = sock->sk;
491
492 if (sk->sk_state != TCP_LISTEN) {
493 struct rose_sock *rose = rose_sk(sk);
494
495 rose->dest_ndigis = 0;
496 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
497 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
498 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
499 sk->sk_max_ack_backlog = backlog;
500 sk->sk_state = TCP_LISTEN;
501 return 0;
502 }
503
504 return -EOPNOTSUPP;
505 }
506
507 static struct proto rose_proto = {
508 .name = "ROSE",
509 .owner = THIS_MODULE,
510 .obj_size = sizeof(struct rose_sock),
511 };
512
rose_create(struct net * net,struct socket * sock,int protocol,int kern)513 static int rose_create(struct net *net, struct socket *sock, int protocol,
514 int kern)
515 {
516 struct sock *sk;
517 struct rose_sock *rose;
518
519 if (!net_eq(net, &init_net))
520 return -EAFNOSUPPORT;
521
522 if (sock->type != SOCK_SEQPACKET || protocol != 0)
523 return -ESOCKTNOSUPPORT;
524
525 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
526 if (sk == NULL)
527 return -ENOMEM;
528
529 rose = rose_sk(sk);
530
531 sock_init_data(sock, sk);
532
533 skb_queue_head_init(&rose->ack_queue);
534 #ifdef M_BIT
535 skb_queue_head_init(&rose->frag_queue);
536 rose->fraglen = 0;
537 #endif
538
539 sock->ops = &rose_proto_ops;
540 sk->sk_protocol = protocol;
541
542 timer_setup(&rose->timer, NULL, 0);
543 timer_setup(&rose->idletimer, NULL, 0);
544
545 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
546 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
547 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
548 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
549 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
550
551 rose->state = ROSE_STATE_0;
552
553 return 0;
554 }
555
rose_make_new(struct sock * osk)556 static struct sock *rose_make_new(struct sock *osk)
557 {
558 struct sock *sk;
559 struct rose_sock *rose, *orose;
560
561 if (osk->sk_type != SOCK_SEQPACKET)
562 return NULL;
563
564 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
565 if (sk == NULL)
566 return NULL;
567
568 rose = rose_sk(sk);
569
570 sock_init_data(NULL, sk);
571
572 skb_queue_head_init(&rose->ack_queue);
573 #ifdef M_BIT
574 skb_queue_head_init(&rose->frag_queue);
575 rose->fraglen = 0;
576 #endif
577
578 sk->sk_type = osk->sk_type;
579 sk->sk_priority = osk->sk_priority;
580 sk->sk_protocol = osk->sk_protocol;
581 sk->sk_rcvbuf = osk->sk_rcvbuf;
582 sk->sk_sndbuf = osk->sk_sndbuf;
583 sk->sk_state = TCP_ESTABLISHED;
584 sock_copy_flags(sk, osk);
585
586 timer_setup(&rose->timer, NULL, 0);
587 timer_setup(&rose->idletimer, NULL, 0);
588
589 orose = rose_sk(osk);
590 rose->t1 = orose->t1;
591 rose->t2 = orose->t2;
592 rose->t3 = orose->t3;
593 rose->hb = orose->hb;
594 rose->idle = orose->idle;
595 rose->defer = orose->defer;
596 rose->device = orose->device;
597 rose->qbitincl = orose->qbitincl;
598
599 return sk;
600 }
601
rose_release(struct socket * sock)602 static int rose_release(struct socket *sock)
603 {
604 struct sock *sk = sock->sk;
605 struct rose_sock *rose;
606
607 if (sk == NULL) return 0;
608
609 sock_hold(sk);
610 sock_orphan(sk);
611 lock_sock(sk);
612 rose = rose_sk(sk);
613
614 switch (rose->state) {
615 case ROSE_STATE_0:
616 release_sock(sk);
617 rose_disconnect(sk, 0, -1, -1);
618 lock_sock(sk);
619 rose_destroy_socket(sk);
620 break;
621
622 case ROSE_STATE_2:
623 rose->neighbour->use--;
624 release_sock(sk);
625 rose_disconnect(sk, 0, -1, -1);
626 lock_sock(sk);
627 rose_destroy_socket(sk);
628 break;
629
630 case ROSE_STATE_1:
631 case ROSE_STATE_3:
632 case ROSE_STATE_4:
633 case ROSE_STATE_5:
634 rose_clear_queues(sk);
635 rose_stop_idletimer(sk);
636 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
637 rose_start_t3timer(sk);
638 rose->state = ROSE_STATE_2;
639 sk->sk_state = TCP_CLOSE;
640 sk->sk_shutdown |= SEND_SHUTDOWN;
641 sk->sk_state_change(sk);
642 sock_set_flag(sk, SOCK_DEAD);
643 sock_set_flag(sk, SOCK_DESTROY);
644 break;
645
646 default:
647 break;
648 }
649
650 sock->sk = NULL;
651 release_sock(sk);
652 sock_put(sk);
653
654 return 0;
655 }
656
rose_bind(struct socket * sock,struct sockaddr * uaddr,int addr_len)657 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
658 {
659 struct sock *sk = sock->sk;
660 struct rose_sock *rose = rose_sk(sk);
661 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
662 struct net_device *dev;
663 ax25_address *source;
664 ax25_uid_assoc *user;
665 int n;
666
667 if (!sock_flag(sk, SOCK_ZAPPED))
668 return -EINVAL;
669
670 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
671 return -EINVAL;
672
673 if (addr->srose_family != AF_ROSE)
674 return -EINVAL;
675
676 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
677 return -EINVAL;
678
679 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
680 return -EINVAL;
681
682 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
683 return -EADDRNOTAVAIL;
684
685 source = &addr->srose_call;
686
687 user = ax25_findbyuid(current_euid());
688 if (user) {
689 rose->source_call = user->call;
690 ax25_uid_put(user);
691 } else {
692 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
693 return -EACCES;
694 rose->source_call = *source;
695 }
696
697 rose->source_addr = addr->srose_addr;
698 rose->device = dev;
699 rose->source_ndigis = addr->srose_ndigis;
700
701 if (addr_len == sizeof(struct full_sockaddr_rose)) {
702 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
703 for (n = 0 ; n < addr->srose_ndigis ; n++)
704 rose->source_digis[n] = full_addr->srose_digis[n];
705 } else {
706 if (rose->source_ndigis == 1) {
707 rose->source_digis[0] = addr->srose_digi;
708 }
709 }
710
711 rose_insert_socket(sk);
712
713 sock_reset_flag(sk, SOCK_ZAPPED);
714
715 return 0;
716 }
717
rose_connect(struct socket * sock,struct sockaddr * uaddr,int addr_len,int flags)718 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
719 {
720 struct sock *sk = sock->sk;
721 struct rose_sock *rose = rose_sk(sk);
722 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
723 unsigned char cause, diagnostic;
724 struct net_device *dev;
725 ax25_uid_assoc *user;
726 int n, err = 0;
727
728 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
729 return -EINVAL;
730
731 if (addr->srose_family != AF_ROSE)
732 return -EINVAL;
733
734 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
735 return -EINVAL;
736
737 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
738 return -EINVAL;
739
740 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
741 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
742 return -EINVAL;
743
744 lock_sock(sk);
745
746 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
747 /* Connect completed during a ERESTARTSYS event */
748 sock->state = SS_CONNECTED;
749 goto out_release;
750 }
751
752 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
753 sock->state = SS_UNCONNECTED;
754 err = -ECONNREFUSED;
755 goto out_release;
756 }
757
758 if (sk->sk_state == TCP_ESTABLISHED) {
759 /* No reconnect on a seqpacket socket */
760 err = -EISCONN;
761 goto out_release;
762 }
763
764 sk->sk_state = TCP_CLOSE;
765 sock->state = SS_UNCONNECTED;
766
767 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
768 &diagnostic, 0);
769 if (!rose->neighbour) {
770 err = -ENETUNREACH;
771 goto out_release;
772 }
773
774 rose->lci = rose_new_lci(rose->neighbour);
775 if (!rose->lci) {
776 err = -ENETUNREACH;
777 goto out_release;
778 }
779
780 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
781 sock_reset_flag(sk, SOCK_ZAPPED);
782
783 if ((dev = rose_dev_first()) == NULL) {
784 err = -ENETUNREACH;
785 goto out_release;
786 }
787
788 user = ax25_findbyuid(current_euid());
789 if (!user) {
790 err = -EINVAL;
791 goto out_release;
792 }
793
794 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
795 rose->source_call = user->call;
796 rose->device = dev;
797 ax25_uid_put(user);
798
799 rose_insert_socket(sk); /* Finish the bind */
800 }
801 rose->dest_addr = addr->srose_addr;
802 rose->dest_call = addr->srose_call;
803 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
804 rose->dest_ndigis = addr->srose_ndigis;
805
806 if (addr_len == sizeof(struct full_sockaddr_rose)) {
807 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
808 for (n = 0 ; n < addr->srose_ndigis ; n++)
809 rose->dest_digis[n] = full_addr->srose_digis[n];
810 } else {
811 if (rose->dest_ndigis == 1) {
812 rose->dest_digis[0] = addr->srose_digi;
813 }
814 }
815
816 /* Move to connecting socket, start sending Connect Requests */
817 sock->state = SS_CONNECTING;
818 sk->sk_state = TCP_SYN_SENT;
819
820 rose->state = ROSE_STATE_1;
821
822 rose->neighbour->use++;
823
824 rose_write_internal(sk, ROSE_CALL_REQUEST);
825 rose_start_heartbeat(sk);
826 rose_start_t1timer(sk);
827
828 /* Now the loop */
829 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
830 err = -EINPROGRESS;
831 goto out_release;
832 }
833
834 /*
835 * A Connect Ack with Choke or timeout or failed routing will go to
836 * closed.
837 */
838 if (sk->sk_state == TCP_SYN_SENT) {
839 DEFINE_WAIT(wait);
840
841 for (;;) {
842 prepare_to_wait(sk_sleep(sk), &wait,
843 TASK_INTERRUPTIBLE);
844 if (sk->sk_state != TCP_SYN_SENT)
845 break;
846 if (!signal_pending(current)) {
847 release_sock(sk);
848 schedule();
849 lock_sock(sk);
850 continue;
851 }
852 err = -ERESTARTSYS;
853 break;
854 }
855 finish_wait(sk_sleep(sk), &wait);
856
857 if (err)
858 goto out_release;
859 }
860
861 if (sk->sk_state != TCP_ESTABLISHED) {
862 sock->state = SS_UNCONNECTED;
863 err = sock_error(sk); /* Always set at this point */
864 goto out_release;
865 }
866
867 sock->state = SS_CONNECTED;
868
869 out_release:
870 release_sock(sk);
871
872 return err;
873 }
874
rose_accept(struct socket * sock,struct socket * newsock,int flags,bool kern)875 static int rose_accept(struct socket *sock, struct socket *newsock, int flags,
876 bool kern)
877 {
878 struct sk_buff *skb;
879 struct sock *newsk;
880 DEFINE_WAIT(wait);
881 struct sock *sk;
882 int err = 0;
883
884 if ((sk = sock->sk) == NULL)
885 return -EINVAL;
886
887 lock_sock(sk);
888 if (sk->sk_type != SOCK_SEQPACKET) {
889 err = -EOPNOTSUPP;
890 goto out_release;
891 }
892
893 if (sk->sk_state != TCP_LISTEN) {
894 err = -EINVAL;
895 goto out_release;
896 }
897
898 /*
899 * The write queue this time is holding sockets ready to use
900 * hooked into the SABM we saved
901 */
902 for (;;) {
903 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
904
905 skb = skb_dequeue(&sk->sk_receive_queue);
906 if (skb)
907 break;
908
909 if (flags & O_NONBLOCK) {
910 err = -EWOULDBLOCK;
911 break;
912 }
913 if (!signal_pending(current)) {
914 release_sock(sk);
915 schedule();
916 lock_sock(sk);
917 continue;
918 }
919 err = -ERESTARTSYS;
920 break;
921 }
922 finish_wait(sk_sleep(sk), &wait);
923 if (err)
924 goto out_release;
925
926 newsk = skb->sk;
927 sock_graft(newsk, newsock);
928
929 /* Now attach up the new socket */
930 skb->sk = NULL;
931 kfree_skb(skb);
932 sk->sk_ack_backlog--;
933
934 out_release:
935 release_sock(sk);
936
937 return err;
938 }
939
rose_getname(struct socket * sock,struct sockaddr * uaddr,int peer)940 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
941 int peer)
942 {
943 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
944 struct sock *sk = sock->sk;
945 struct rose_sock *rose = rose_sk(sk);
946 int n;
947
948 memset(srose, 0, sizeof(*srose));
949 if (peer != 0) {
950 if (sk->sk_state != TCP_ESTABLISHED)
951 return -ENOTCONN;
952 srose->srose_family = AF_ROSE;
953 srose->srose_addr = rose->dest_addr;
954 srose->srose_call = rose->dest_call;
955 srose->srose_ndigis = rose->dest_ndigis;
956 for (n = 0; n < rose->dest_ndigis; n++)
957 srose->srose_digis[n] = rose->dest_digis[n];
958 } else {
959 srose->srose_family = AF_ROSE;
960 srose->srose_addr = rose->source_addr;
961 srose->srose_call = rose->source_call;
962 srose->srose_ndigis = rose->source_ndigis;
963 for (n = 0; n < rose->source_ndigis; n++)
964 srose->srose_digis[n] = rose->source_digis[n];
965 }
966
967 return sizeof(struct full_sockaddr_rose);
968 }
969
rose_rx_call_request(struct sk_buff * skb,struct net_device * dev,struct rose_neigh * neigh,unsigned int lci)970 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
971 {
972 struct sock *sk;
973 struct sock *make;
974 struct rose_sock *make_rose;
975 struct rose_facilities_struct facilities;
976 int n;
977
978 skb->sk = NULL; /* Initially we don't know who it's for */
979
980 /*
981 * skb->data points to the rose frame start
982 */
983 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
984
985 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
986 skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
987 &facilities)) {
988 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
989 return 0;
990 }
991
992 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
993
994 /*
995 * We can't accept the Call Request.
996 */
997 if (sk == NULL || sk_acceptq_is_full(sk) ||
998 (make = rose_make_new(sk)) == NULL) {
999 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1000 return 0;
1001 }
1002
1003 skb->sk = make;
1004 make->sk_state = TCP_ESTABLISHED;
1005 make_rose = rose_sk(make);
1006
1007 make_rose->lci = lci;
1008 make_rose->dest_addr = facilities.dest_addr;
1009 make_rose->dest_call = facilities.dest_call;
1010 make_rose->dest_ndigis = facilities.dest_ndigis;
1011 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1012 make_rose->dest_digis[n] = facilities.dest_digis[n];
1013 make_rose->source_addr = facilities.source_addr;
1014 make_rose->source_call = facilities.source_call;
1015 make_rose->source_ndigis = facilities.source_ndigis;
1016 for (n = 0 ; n < facilities.source_ndigis ; n++)
1017 make_rose->source_digis[n] = facilities.source_digis[n];
1018 make_rose->neighbour = neigh;
1019 make_rose->device = dev;
1020 make_rose->facilities = facilities;
1021
1022 make_rose->neighbour->use++;
1023
1024 if (rose_sk(sk)->defer) {
1025 make_rose->state = ROSE_STATE_5;
1026 } else {
1027 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1028 make_rose->state = ROSE_STATE_3;
1029 rose_start_idletimer(make);
1030 }
1031
1032 make_rose->condition = 0x00;
1033 make_rose->vs = 0;
1034 make_rose->va = 0;
1035 make_rose->vr = 0;
1036 make_rose->vl = 0;
1037 sk->sk_ack_backlog++;
1038
1039 rose_insert_socket(make);
1040
1041 skb_queue_head(&sk->sk_receive_queue, skb);
1042
1043 rose_start_heartbeat(make);
1044
1045 if (!sock_flag(sk, SOCK_DEAD))
1046 sk->sk_data_ready(sk);
1047
1048 return 1;
1049 }
1050
rose_sendmsg(struct socket * sock,struct msghdr * msg,size_t len)1051 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1052 {
1053 struct sock *sk = sock->sk;
1054 struct rose_sock *rose = rose_sk(sk);
1055 DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1056 int err;
1057 struct full_sockaddr_rose srose;
1058 struct sk_buff *skb;
1059 unsigned char *asmptr;
1060 int n, size, qbit = 0;
1061
1062 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1063 return -EINVAL;
1064
1065 if (sock_flag(sk, SOCK_ZAPPED))
1066 return -EADDRNOTAVAIL;
1067
1068 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1069 send_sig(SIGPIPE, current, 0);
1070 return -EPIPE;
1071 }
1072
1073 if (rose->neighbour == NULL || rose->device == NULL)
1074 return -ENETUNREACH;
1075
1076 if (usrose != NULL) {
1077 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1078 return -EINVAL;
1079 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1080 memcpy(&srose, usrose, msg->msg_namelen);
1081 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1082 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1083 return -EISCONN;
1084 if (srose.srose_ndigis != rose->dest_ndigis)
1085 return -EISCONN;
1086 if (srose.srose_ndigis == rose->dest_ndigis) {
1087 for (n = 0 ; n < srose.srose_ndigis ; n++)
1088 if (ax25cmp(&rose->dest_digis[n],
1089 &srose.srose_digis[n]))
1090 return -EISCONN;
1091 }
1092 if (srose.srose_family != AF_ROSE)
1093 return -EINVAL;
1094 } else {
1095 if (sk->sk_state != TCP_ESTABLISHED)
1096 return -ENOTCONN;
1097
1098 srose.srose_family = AF_ROSE;
1099 srose.srose_addr = rose->dest_addr;
1100 srose.srose_call = rose->dest_call;
1101 srose.srose_ndigis = rose->dest_ndigis;
1102 for (n = 0 ; n < rose->dest_ndigis ; n++)
1103 srose.srose_digis[n] = rose->dest_digis[n];
1104 }
1105
1106 /* Build a packet */
1107 /* Sanity check the packet size */
1108 if (len > 65535)
1109 return -EMSGSIZE;
1110
1111 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1112
1113 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1114 return err;
1115
1116 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1117
1118 /*
1119 * Put the data on the end
1120 */
1121
1122 skb_reset_transport_header(skb);
1123 skb_put(skb, len);
1124
1125 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1126 if (err) {
1127 kfree_skb(skb);
1128 return err;
1129 }
1130
1131 /*
1132 * If the Q BIT Include socket option is in force, the first
1133 * byte of the user data is the logical value of the Q Bit.
1134 */
1135 if (rose->qbitincl) {
1136 qbit = skb->data[0];
1137 skb_pull(skb, 1);
1138 }
1139
1140 /*
1141 * Push down the ROSE header
1142 */
1143 asmptr = skb_push(skb, ROSE_MIN_LEN);
1144
1145 /* Build a ROSE Network header */
1146 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1147 asmptr[1] = (rose->lci >> 0) & 0xFF;
1148 asmptr[2] = ROSE_DATA;
1149
1150 if (qbit)
1151 asmptr[0] |= ROSE_Q_BIT;
1152
1153 if (sk->sk_state != TCP_ESTABLISHED) {
1154 kfree_skb(skb);
1155 return -ENOTCONN;
1156 }
1157
1158 #ifdef M_BIT
1159 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1160 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1161 unsigned char header[ROSE_MIN_LEN];
1162 struct sk_buff *skbn;
1163 int frontlen;
1164 int lg;
1165
1166 /* Save a copy of the Header */
1167 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1168 skb_pull(skb, ROSE_MIN_LEN);
1169
1170 frontlen = skb_headroom(skb);
1171
1172 while (skb->len > 0) {
1173 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1174 kfree_skb(skb);
1175 return err;
1176 }
1177
1178 skbn->sk = sk;
1179 skbn->free = 1;
1180 skbn->arp = 1;
1181
1182 skb_reserve(skbn, frontlen);
1183
1184 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1185
1186 /* Copy the user data */
1187 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1188 skb_pull(skb, lg);
1189
1190 /* Duplicate the Header */
1191 skb_push(skbn, ROSE_MIN_LEN);
1192 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1193
1194 if (skb->len > 0)
1195 skbn->data[2] |= M_BIT;
1196
1197 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1198 }
1199
1200 skb->free = 1;
1201 kfree_skb(skb);
1202 } else {
1203 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1204 }
1205 #else
1206 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1207 #endif
1208
1209 rose_kick(sk);
1210
1211 return len;
1212 }
1213
1214
rose_recvmsg(struct socket * sock,struct msghdr * msg,size_t size,int flags)1215 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1216 int flags)
1217 {
1218 struct sock *sk = sock->sk;
1219 struct rose_sock *rose = rose_sk(sk);
1220 size_t copied;
1221 unsigned char *asmptr;
1222 struct sk_buff *skb;
1223 int n, er, qbit;
1224
1225 /*
1226 * This works for seqpacket too. The receiver has ordered the queue for
1227 * us! We do one quick check first though
1228 */
1229 if (sk->sk_state != TCP_ESTABLISHED)
1230 return -ENOTCONN;
1231
1232 /* Now we can treat all alike */
1233 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1234 return er;
1235
1236 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1237
1238 skb_pull(skb, ROSE_MIN_LEN);
1239
1240 if (rose->qbitincl) {
1241 asmptr = skb_push(skb, 1);
1242 *asmptr = qbit;
1243 }
1244
1245 skb_reset_transport_header(skb);
1246 copied = skb->len;
1247
1248 if (copied > size) {
1249 copied = size;
1250 msg->msg_flags |= MSG_TRUNC;
1251 }
1252
1253 skb_copy_datagram_msg(skb, 0, msg, copied);
1254
1255 if (msg->msg_name) {
1256 struct sockaddr_rose *srose;
1257 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1258 msg->msg_name);
1259
1260 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1261 srose = msg->msg_name;
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 for (n = 0 ; n < rose->dest_ndigis ; n++)
1267 full_srose->srose_digis[n] = rose->dest_digis[n];
1268 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1269 }
1270
1271 skb_free_datagram(sk, skb);
1272
1273 return copied;
1274 }
1275
1276
rose_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)1277 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1278 {
1279 struct sock *sk = sock->sk;
1280 struct rose_sock *rose = rose_sk(sk);
1281 void __user *argp = (void __user *)arg;
1282
1283 switch (cmd) {
1284 case TIOCOUTQ: {
1285 long amount;
1286
1287 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1288 if (amount < 0)
1289 amount = 0;
1290 return put_user(amount, (unsigned int __user *) argp);
1291 }
1292
1293 case TIOCINQ: {
1294 struct sk_buff *skb;
1295 long amount = 0L;
1296 /* These two are safe on a single CPU system as only user tasks fiddle here */
1297 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1298 amount = skb->len;
1299 return put_user(amount, (unsigned int __user *) argp);
1300 }
1301
1302 case SIOCGSTAMP:
1303 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1304
1305 case SIOCGSTAMPNS:
1306 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1307
1308 case SIOCGIFADDR:
1309 case SIOCSIFADDR:
1310 case SIOCGIFDSTADDR:
1311 case SIOCSIFDSTADDR:
1312 case SIOCGIFBRDADDR:
1313 case SIOCSIFBRDADDR:
1314 case SIOCGIFNETMASK:
1315 case SIOCSIFNETMASK:
1316 case SIOCGIFMETRIC:
1317 case SIOCSIFMETRIC:
1318 return -EINVAL;
1319
1320 case SIOCADDRT:
1321 case SIOCDELRT:
1322 case SIOCRSCLRRT:
1323 if (!capable(CAP_NET_ADMIN))
1324 return -EPERM;
1325 return rose_rt_ioctl(cmd, argp);
1326
1327 case SIOCRSGCAUSE: {
1328 struct rose_cause_struct rose_cause;
1329 rose_cause.cause = rose->cause;
1330 rose_cause.diagnostic = rose->diagnostic;
1331 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1332 }
1333
1334 case SIOCRSSCAUSE: {
1335 struct rose_cause_struct rose_cause;
1336 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1337 return -EFAULT;
1338 rose->cause = rose_cause.cause;
1339 rose->diagnostic = rose_cause.diagnostic;
1340 return 0;
1341 }
1342
1343 case SIOCRSSL2CALL:
1344 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1345 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1346 ax25_listen_release(&rose_callsign, NULL);
1347 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1348 return -EFAULT;
1349 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1350 return ax25_listen_register(&rose_callsign, NULL);
1351
1352 return 0;
1353
1354 case SIOCRSGL2CALL:
1355 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1356
1357 case SIOCRSACCEPT:
1358 if (rose->state == ROSE_STATE_5) {
1359 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1360 rose_start_idletimer(sk);
1361 rose->condition = 0x00;
1362 rose->vs = 0;
1363 rose->va = 0;
1364 rose->vr = 0;
1365 rose->vl = 0;
1366 rose->state = ROSE_STATE_3;
1367 }
1368 return 0;
1369
1370 default:
1371 return -ENOIOCTLCMD;
1372 }
1373
1374 return 0;
1375 }
1376
1377 #ifdef CONFIG_PROC_FS
rose_info_start(struct seq_file * seq,loff_t * pos)1378 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1379 __acquires(rose_list_lock)
1380 {
1381 spin_lock_bh(&rose_list_lock);
1382 return seq_hlist_start_head(&rose_list, *pos);
1383 }
1384
rose_info_next(struct seq_file * seq,void * v,loff_t * pos)1385 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1386 {
1387 return seq_hlist_next(v, &rose_list, pos);
1388 }
1389
rose_info_stop(struct seq_file * seq,void * v)1390 static void rose_info_stop(struct seq_file *seq, void *v)
1391 __releases(rose_list_lock)
1392 {
1393 spin_unlock_bh(&rose_list_lock);
1394 }
1395
rose_info_show(struct seq_file * seq,void * v)1396 static int rose_info_show(struct seq_file *seq, void *v)
1397 {
1398 char buf[11], rsbuf[11];
1399
1400 if (v == SEQ_START_TOKEN)
1401 seq_puts(seq,
1402 "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");
1403
1404 else {
1405 struct sock *s = sk_entry(v);
1406 struct rose_sock *rose = rose_sk(s);
1407 const char *devname, *callsign;
1408 const struct net_device *dev = rose->device;
1409
1410 if (!dev)
1411 devname = "???";
1412 else
1413 devname = dev->name;
1414
1415 seq_printf(seq, "%-10s %-9s ",
1416 rose2asc(rsbuf, &rose->dest_addr),
1417 ax2asc(buf, &rose->dest_call));
1418
1419 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1420 callsign = "??????-?";
1421 else
1422 callsign = ax2asc(buf, &rose->source_call);
1423
1424 seq_printf(seq,
1425 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1426 rose2asc(rsbuf, &rose->source_addr),
1427 callsign,
1428 devname,
1429 rose->lci & 0x0FFF,
1430 (rose->neighbour) ? rose->neighbour->number : 0,
1431 rose->state,
1432 rose->vs,
1433 rose->vr,
1434 rose->va,
1435 ax25_display_timer(&rose->timer) / HZ,
1436 rose->t1 / HZ,
1437 rose->t2 / HZ,
1438 rose->t3 / HZ,
1439 rose->hb / HZ,
1440 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1441 rose->idle / (60 * HZ),
1442 sk_wmem_alloc_get(s),
1443 sk_rmem_alloc_get(s),
1444 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1445 }
1446
1447 return 0;
1448 }
1449
1450 static const struct seq_operations rose_info_seqops = {
1451 .start = rose_info_start,
1452 .next = rose_info_next,
1453 .stop = rose_info_stop,
1454 .show = rose_info_show,
1455 };
1456 #endif /* CONFIG_PROC_FS */
1457
1458 static const struct net_proto_family rose_family_ops = {
1459 .family = PF_ROSE,
1460 .create = rose_create,
1461 .owner = THIS_MODULE,
1462 };
1463
1464 static const struct proto_ops rose_proto_ops = {
1465 .family = PF_ROSE,
1466 .owner = THIS_MODULE,
1467 .release = rose_release,
1468 .bind = rose_bind,
1469 .connect = rose_connect,
1470 .socketpair = sock_no_socketpair,
1471 .accept = rose_accept,
1472 .getname = rose_getname,
1473 .poll = datagram_poll,
1474 .ioctl = rose_ioctl,
1475 .listen = rose_listen,
1476 .shutdown = sock_no_shutdown,
1477 .setsockopt = rose_setsockopt,
1478 .getsockopt = rose_getsockopt,
1479 .sendmsg = rose_sendmsg,
1480 .recvmsg = rose_recvmsg,
1481 .mmap = sock_no_mmap,
1482 .sendpage = sock_no_sendpage,
1483 };
1484
1485 static struct notifier_block rose_dev_notifier = {
1486 .notifier_call = rose_device_event,
1487 };
1488
1489 static struct net_device **dev_rose;
1490
1491 static struct ax25_protocol rose_pid = {
1492 .pid = AX25_P_ROSE,
1493 .func = rose_route_frame
1494 };
1495
1496 static struct ax25_linkfail rose_linkfail_notifier = {
1497 .func = rose_link_failed
1498 };
1499
rose_proto_init(void)1500 static int __init rose_proto_init(void)
1501 {
1502 int i;
1503 int rc;
1504
1505 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1506 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1507 rc = -EINVAL;
1508 goto out;
1509 }
1510
1511 rc = proto_register(&rose_proto, 0);
1512 if (rc != 0)
1513 goto out;
1514
1515 rose_callsign = null_ax25_address;
1516
1517 dev_rose = kcalloc(rose_ndevs, sizeof(struct net_device *),
1518 GFP_KERNEL);
1519 if (dev_rose == NULL) {
1520 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1521 rc = -ENOMEM;
1522 goto out_proto_unregister;
1523 }
1524
1525 for (i = 0; i < rose_ndevs; i++) {
1526 struct net_device *dev;
1527 char name[IFNAMSIZ];
1528
1529 sprintf(name, "rose%d", i);
1530 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1531 if (!dev) {
1532 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1533 rc = -ENOMEM;
1534 goto fail;
1535 }
1536 rc = register_netdev(dev);
1537 if (rc) {
1538 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1539 free_netdev(dev);
1540 goto fail;
1541 }
1542 rose_set_lockdep_key(dev);
1543 dev_rose[i] = dev;
1544 }
1545
1546 sock_register(&rose_family_ops);
1547 register_netdevice_notifier(&rose_dev_notifier);
1548
1549 ax25_register_pid(&rose_pid);
1550 ax25_linkfail_register(&rose_linkfail_notifier);
1551
1552 #ifdef CONFIG_SYSCTL
1553 rose_register_sysctl();
1554 #endif
1555 rose_loopback_init();
1556
1557 rose_add_loopback_neigh();
1558
1559 proc_create_seq("rose", 0444, init_net.proc_net, &rose_info_seqops);
1560 proc_create_seq("rose_neigh", 0444, init_net.proc_net,
1561 &rose_neigh_seqops);
1562 proc_create_seq("rose_nodes", 0444, init_net.proc_net,
1563 &rose_node_seqops);
1564 proc_create_seq("rose_routes", 0444, init_net.proc_net,
1565 &rose_route_seqops);
1566 out:
1567 return rc;
1568 fail:
1569 while (--i >= 0) {
1570 unregister_netdev(dev_rose[i]);
1571 free_netdev(dev_rose[i]);
1572 }
1573 kfree(dev_rose);
1574 out_proto_unregister:
1575 proto_unregister(&rose_proto);
1576 goto out;
1577 }
1578 module_init(rose_proto_init);
1579
1580 module_param(rose_ndevs, int, 0);
1581 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1582
1583 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1584 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1585 MODULE_LICENSE("GPL");
1586 MODULE_ALIAS_NETPROTO(PF_ROSE);
1587
rose_exit(void)1588 static void __exit rose_exit(void)
1589 {
1590 int i;
1591
1592 remove_proc_entry("rose", init_net.proc_net);
1593 remove_proc_entry("rose_neigh", init_net.proc_net);
1594 remove_proc_entry("rose_nodes", init_net.proc_net);
1595 remove_proc_entry("rose_routes", init_net.proc_net);
1596 rose_loopback_clear();
1597
1598 rose_rt_free();
1599
1600 ax25_protocol_release(AX25_P_ROSE);
1601 ax25_linkfail_release(&rose_linkfail_notifier);
1602
1603 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1604 ax25_listen_release(&rose_callsign, NULL);
1605
1606 #ifdef CONFIG_SYSCTL
1607 rose_unregister_sysctl();
1608 #endif
1609 unregister_netdevice_notifier(&rose_dev_notifier);
1610
1611 sock_unregister(PF_ROSE);
1612
1613 for (i = 0; i < rose_ndevs; i++) {
1614 struct net_device *dev = dev_rose[i];
1615
1616 if (dev) {
1617 unregister_netdev(dev);
1618 free_netdev(dev);
1619 }
1620 }
1621
1622 kfree(dev_rose);
1623 proto_unregister(&rose_proto);
1624 }
1625
1626 module_exit(rose_exit);
1627
