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(const rose_address * addr1,const rose_address * addr2)112 int rosecmp(const rose_address *addr1, const 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(const rose_address * addr1,const rose_address * addr2,unsigned short mask)126 int rosecmpm(const rose_address *addr1, const rose_address *addr2,
127 unsigned short mask)
128 {
129 unsigned int i, j;
130
131 if (mask > 10)
132 return 1;
133
134 for (i = 0; i < mask; i++) {
135 j = i / 2;
136
137 if ((i % 2) != 0) {
138 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
139 return 1;
140 } else {
141 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
142 return 1;
143 }
144 }
145
146 return 0;
147 }
148
149 /*
150 * Socket removal during an interrupt is now safe.
151 */
rose_remove_socket(struct sock * sk)152 static void rose_remove_socket(struct sock *sk)
153 {
154 spin_lock_bh(&rose_list_lock);
155 sk_del_node_init(sk);
156 spin_unlock_bh(&rose_list_lock);
157 }
158
159 /*
160 * Kill all bound sockets on a broken link layer connection to a
161 * particular neighbour.
162 */
rose_kill_by_neigh(struct rose_neigh * neigh)163 void rose_kill_by_neigh(struct rose_neigh *neigh)
164 {
165 struct sock *s;
166
167 spin_lock_bh(&rose_list_lock);
168 sk_for_each(s, &rose_list) {
169 struct rose_sock *rose = rose_sk(s);
170
171 if (rose->neighbour == neigh) {
172 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
173 rose->neighbour->use--;
174 rose->neighbour = NULL;
175 }
176 }
177 spin_unlock_bh(&rose_list_lock);
178 }
179
180 /*
181 * Kill all bound sockets on a dropped device.
182 */
rose_kill_by_device(struct net_device * dev)183 static void rose_kill_by_device(struct net_device *dev)
184 {
185 struct sock *s;
186
187 spin_lock_bh(&rose_list_lock);
188 sk_for_each(s, &rose_list) {
189 struct rose_sock *rose = rose_sk(s);
190
191 if (rose->device == dev) {
192 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
193 if (rose->neighbour)
194 rose->neighbour->use--;
195 rose->device = NULL;
196 }
197 }
198 spin_unlock_bh(&rose_list_lock);
199 }
200
201 /*
202 * Handle device status changes.
203 */
rose_device_event(struct notifier_block * this,unsigned long event,void * ptr)204 static int rose_device_event(struct notifier_block *this,
205 unsigned long event, void *ptr)
206 {
207 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
208
209 if (!net_eq(dev_net(dev), &init_net))
210 return NOTIFY_DONE;
211
212 if (event != NETDEV_DOWN)
213 return NOTIFY_DONE;
214
215 switch (dev->type) {
216 case ARPHRD_ROSE:
217 rose_kill_by_device(dev);
218 break;
219 case ARPHRD_AX25:
220 rose_link_device_down(dev);
221 rose_rt_device_down(dev);
222 break;
223 }
224
225 return NOTIFY_DONE;
226 }
227
228 /*
229 * Add a socket to the bound sockets list.
230 */
rose_insert_socket(struct sock * sk)231 static void rose_insert_socket(struct sock *sk)
232 {
233
234 spin_lock_bh(&rose_list_lock);
235 sk_add_node(sk, &rose_list);
236 spin_unlock_bh(&rose_list_lock);
237 }
238
239 /*
240 * Find a socket that wants to accept the Call Request we just
241 * received.
242 */
rose_find_listener(rose_address * addr,ax25_address * call)243 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
244 {
245 struct sock *s;
246
247 spin_lock_bh(&rose_list_lock);
248 sk_for_each(s, &rose_list) {
249 struct rose_sock *rose = rose_sk(s);
250
251 if (!rosecmp(&rose->source_addr, addr) &&
252 !ax25cmp(&rose->source_call, call) &&
253 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
254 goto found;
255 }
256
257 sk_for_each(s, &rose_list) {
258 struct rose_sock *rose = rose_sk(s);
259
260 if (!rosecmp(&rose->source_addr, addr) &&
261 !ax25cmp(&rose->source_call, &null_ax25_address) &&
262 s->sk_state == TCP_LISTEN)
263 goto found;
264 }
265 s = NULL;
266 found:
267 spin_unlock_bh(&rose_list_lock);
268 return s;
269 }
270
271 /*
272 * Find a connected ROSE socket given my LCI and device.
273 */
rose_find_socket(unsigned int lci,struct rose_neigh * neigh)274 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
275 {
276 struct sock *s;
277
278 spin_lock_bh(&rose_list_lock);
279 sk_for_each(s, &rose_list) {
280 struct rose_sock *rose = rose_sk(s);
281
282 if (rose->lci == lci && rose->neighbour == neigh)
283 goto found;
284 }
285 s = NULL;
286 found:
287 spin_unlock_bh(&rose_list_lock);
288 return s;
289 }
290
291 /*
292 * Find a unique LCI for a given device.
293 */
rose_new_lci(struct rose_neigh * neigh)294 unsigned int rose_new_lci(struct rose_neigh *neigh)
295 {
296 int lci;
297
298 if (neigh->dce_mode) {
299 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
300 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
301 return lci;
302 } else {
303 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
304 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
305 return lci;
306 }
307
308 return 0;
309 }
310
311 /*
312 * Deferred destroy.
313 */
314 void rose_destroy_socket(struct sock *);
315
316 /*
317 * Handler for deferred kills.
318 */
rose_destroy_timer(struct timer_list * t)319 static void rose_destroy_timer(struct timer_list *t)
320 {
321 struct sock *sk = from_timer(sk, t, sk_timer);
322
323 rose_destroy_socket(sk);
324 }
325
326 /*
327 * This is called from user mode and the timers. Thus it protects itself
328 * against interrupt users but doesn't worry about being called during
329 * work. Once it is removed from the queue no interrupt or bottom half
330 * will touch it and we are (fairly 8-) ) safe.
331 */
rose_destroy_socket(struct sock * sk)332 void rose_destroy_socket(struct sock *sk)
333 {
334 struct sk_buff *skb;
335
336 rose_remove_socket(sk);
337 rose_stop_heartbeat(sk);
338 rose_stop_idletimer(sk);
339 rose_stop_timer(sk);
340
341 rose_clear_queues(sk); /* Flush the queues */
342
343 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
344 if (skb->sk != sk) { /* A pending connection */
345 /* Queue the unaccepted socket for death */
346 sock_set_flag(skb->sk, SOCK_DEAD);
347 rose_start_heartbeat(skb->sk);
348 rose_sk(skb->sk)->state = ROSE_STATE_0;
349 }
350
351 kfree_skb(skb);
352 }
353
354 if (sk_has_allocations(sk)) {
355 /* Defer: outstanding buffers */
356 timer_setup(&sk->sk_timer, rose_destroy_timer, 0);
357 sk->sk_timer.expires = jiffies + 10 * HZ;
358 add_timer(&sk->sk_timer);
359 } else
360 sock_put(sk);
361 }
362
363 /*
364 * Handling for system calls applied via the various interfaces to a
365 * ROSE socket object.
366 */
367
rose_setsockopt(struct socket * sock,int level,int optname,sockptr_t optval,unsigned int optlen)368 static int rose_setsockopt(struct socket *sock, int level, int optname,
369 sockptr_t optval, unsigned int optlen)
370 {
371 struct sock *sk = sock->sk;
372 struct rose_sock *rose = rose_sk(sk);
373 int opt;
374
375 if (level != SOL_ROSE)
376 return -ENOPROTOOPT;
377
378 if (optlen < sizeof(int))
379 return -EINVAL;
380
381 if (copy_from_sockptr(&opt, optval, sizeof(int)))
382 return -EFAULT;
383
384 switch (optname) {
385 case ROSE_DEFER:
386 rose->defer = opt ? 1 : 0;
387 return 0;
388
389 case ROSE_T1:
390 if (opt < 1)
391 return -EINVAL;
392 rose->t1 = opt * HZ;
393 return 0;
394
395 case ROSE_T2:
396 if (opt < 1)
397 return -EINVAL;
398 rose->t2 = opt * HZ;
399 return 0;
400
401 case ROSE_T3:
402 if (opt < 1)
403 return -EINVAL;
404 rose->t3 = opt * HZ;
405 return 0;
406
407 case ROSE_HOLDBACK:
408 if (opt < 1)
409 return -EINVAL;
410 rose->hb = opt * HZ;
411 return 0;
412
413 case ROSE_IDLE:
414 if (opt < 0)
415 return -EINVAL;
416 rose->idle = opt * 60 * HZ;
417 return 0;
418
419 case ROSE_QBITINCL:
420 rose->qbitincl = opt ? 1 : 0;
421 return 0;
422
423 default:
424 return -ENOPROTOOPT;
425 }
426 }
427
rose_getsockopt(struct socket * sock,int level,int optname,char __user * optval,int __user * optlen)428 static int rose_getsockopt(struct socket *sock, int level, int optname,
429 char __user *optval, int __user *optlen)
430 {
431 struct sock *sk = sock->sk;
432 struct rose_sock *rose = rose_sk(sk);
433 int val = 0;
434 int len;
435
436 if (level != SOL_ROSE)
437 return -ENOPROTOOPT;
438
439 if (get_user(len, optlen))
440 return -EFAULT;
441
442 if (len < 0)
443 return -EINVAL;
444
445 switch (optname) {
446 case ROSE_DEFER:
447 val = rose->defer;
448 break;
449
450 case ROSE_T1:
451 val = rose->t1 / HZ;
452 break;
453
454 case ROSE_T2:
455 val = rose->t2 / HZ;
456 break;
457
458 case ROSE_T3:
459 val = rose->t3 / HZ;
460 break;
461
462 case ROSE_HOLDBACK:
463 val = rose->hb / HZ;
464 break;
465
466 case ROSE_IDLE:
467 val = rose->idle / (60 * HZ);
468 break;
469
470 case ROSE_QBITINCL:
471 val = rose->qbitincl;
472 break;
473
474 default:
475 return -ENOPROTOOPT;
476 }
477
478 len = min_t(unsigned int, len, sizeof(int));
479
480 if (put_user(len, optlen))
481 return -EFAULT;
482
483 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
484 }
485
rose_listen(struct socket * sock,int backlog)486 static int rose_listen(struct socket *sock, int backlog)
487 {
488 struct sock *sk = sock->sk;
489
490 if (sk->sk_state != TCP_LISTEN) {
491 struct rose_sock *rose = rose_sk(sk);
492
493 rose->dest_ndigis = 0;
494 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
495 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
496 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
497 sk->sk_max_ack_backlog = backlog;
498 sk->sk_state = TCP_LISTEN;
499 return 0;
500 }
501
502 return -EOPNOTSUPP;
503 }
504
505 static struct proto rose_proto = {
506 .name = "ROSE",
507 .owner = THIS_MODULE,
508 .obj_size = sizeof(struct rose_sock),
509 };
510
rose_create(struct net * net,struct socket * sock,int protocol,int kern)511 static int rose_create(struct net *net, struct socket *sock, int protocol,
512 int kern)
513 {
514 struct sock *sk;
515 struct rose_sock *rose;
516
517 if (!net_eq(net, &init_net))
518 return -EAFNOSUPPORT;
519
520 if (sock->type != SOCK_SEQPACKET || protocol != 0)
521 return -ESOCKTNOSUPPORT;
522
523 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
524 if (sk == NULL)
525 return -ENOMEM;
526
527 rose = rose_sk(sk);
528
529 sock_init_data(sock, sk);
530
531 skb_queue_head_init(&rose->ack_queue);
532 #ifdef M_BIT
533 skb_queue_head_init(&rose->frag_queue);
534 rose->fraglen = 0;
535 #endif
536
537 sock->ops = &rose_proto_ops;
538 sk->sk_protocol = protocol;
539
540 timer_setup(&rose->timer, NULL, 0);
541 timer_setup(&rose->idletimer, NULL, 0);
542
543 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
544 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
545 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
546 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
547 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
548
549 rose->state = ROSE_STATE_0;
550
551 return 0;
552 }
553
rose_make_new(struct sock * osk)554 static struct sock *rose_make_new(struct sock *osk)
555 {
556 struct sock *sk;
557 struct rose_sock *rose, *orose;
558
559 if (osk->sk_type != SOCK_SEQPACKET)
560 return NULL;
561
562 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
563 if (sk == NULL)
564 return NULL;
565
566 rose = rose_sk(sk);
567
568 sock_init_data(NULL, sk);
569
570 skb_queue_head_init(&rose->ack_queue);
571 #ifdef M_BIT
572 skb_queue_head_init(&rose->frag_queue);
573 rose->fraglen = 0;
574 #endif
575
576 sk->sk_type = osk->sk_type;
577 sk->sk_priority = osk->sk_priority;
578 sk->sk_protocol = osk->sk_protocol;
579 sk->sk_rcvbuf = osk->sk_rcvbuf;
580 sk->sk_sndbuf = osk->sk_sndbuf;
581 sk->sk_state = TCP_ESTABLISHED;
582 sock_copy_flags(sk, osk);
583
584 timer_setup(&rose->timer, NULL, 0);
585 timer_setup(&rose->idletimer, NULL, 0);
586
587 orose = rose_sk(osk);
588 rose->t1 = orose->t1;
589 rose->t2 = orose->t2;
590 rose->t3 = orose->t3;
591 rose->hb = orose->hb;
592 rose->idle = orose->idle;
593 rose->defer = orose->defer;
594 rose->device = orose->device;
595 rose->qbitincl = orose->qbitincl;
596
597 return sk;
598 }
599
rose_release(struct socket * sock)600 static int rose_release(struct socket *sock)
601 {
602 struct sock *sk = sock->sk;
603 struct rose_sock *rose;
604
605 if (sk == NULL) return 0;
606
607 sock_hold(sk);
608 sock_orphan(sk);
609 lock_sock(sk);
610 rose = rose_sk(sk);
611
612 switch (rose->state) {
613 case ROSE_STATE_0:
614 release_sock(sk);
615 rose_disconnect(sk, 0, -1, -1);
616 lock_sock(sk);
617 rose_destroy_socket(sk);
618 break;
619
620 case ROSE_STATE_2:
621 rose->neighbour->use--;
622 release_sock(sk);
623 rose_disconnect(sk, 0, -1, -1);
624 lock_sock(sk);
625 rose_destroy_socket(sk);
626 break;
627
628 case ROSE_STATE_1:
629 case ROSE_STATE_3:
630 case ROSE_STATE_4:
631 case ROSE_STATE_5:
632 rose_clear_queues(sk);
633 rose_stop_idletimer(sk);
634 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
635 rose_start_t3timer(sk);
636 rose->state = ROSE_STATE_2;
637 sk->sk_state = TCP_CLOSE;
638 sk->sk_shutdown |= SEND_SHUTDOWN;
639 sk->sk_state_change(sk);
640 sock_set_flag(sk, SOCK_DEAD);
641 sock_set_flag(sk, SOCK_DESTROY);
642 break;
643
644 default:
645 break;
646 }
647
648 sock->sk = NULL;
649 release_sock(sk);
650 sock_put(sk);
651
652 return 0;
653 }
654
rose_bind(struct socket * sock,struct sockaddr * uaddr,int addr_len)655 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
656 {
657 struct sock *sk = sock->sk;
658 struct rose_sock *rose = rose_sk(sk);
659 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
660 struct net_device *dev;
661 ax25_address *source;
662 ax25_uid_assoc *user;
663 int n;
664
665 if (!sock_flag(sk, SOCK_ZAPPED))
666 return -EINVAL;
667
668 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
669 return -EINVAL;
670
671 if (addr->srose_family != AF_ROSE)
672 return -EINVAL;
673
674 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
675 return -EINVAL;
676
677 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
678 return -EINVAL;
679
680 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
681 return -EADDRNOTAVAIL;
682
683 source = &addr->srose_call;
684
685 user = ax25_findbyuid(current_euid());
686 if (user) {
687 rose->source_call = user->call;
688 ax25_uid_put(user);
689 } else {
690 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
691 dev_put(dev);
692 return -EACCES;
693 }
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_acceptq_removed(sk);
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_acceptq_added(sk);
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 SIOCGIFADDR:
1303 case SIOCSIFADDR:
1304 case SIOCGIFDSTADDR:
1305 case SIOCSIFDSTADDR:
1306 case SIOCGIFBRDADDR:
1307 case SIOCSIFBRDADDR:
1308 case SIOCGIFNETMASK:
1309 case SIOCSIFNETMASK:
1310 case SIOCGIFMETRIC:
1311 case SIOCSIFMETRIC:
1312 return -EINVAL;
1313
1314 case SIOCADDRT:
1315 case SIOCDELRT:
1316 case SIOCRSCLRRT:
1317 if (!capable(CAP_NET_ADMIN))
1318 return -EPERM;
1319 return rose_rt_ioctl(cmd, argp);
1320
1321 case SIOCRSGCAUSE: {
1322 struct rose_cause_struct rose_cause;
1323 rose_cause.cause = rose->cause;
1324 rose_cause.diagnostic = rose->diagnostic;
1325 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1326 }
1327
1328 case SIOCRSSCAUSE: {
1329 struct rose_cause_struct rose_cause;
1330 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1331 return -EFAULT;
1332 rose->cause = rose_cause.cause;
1333 rose->diagnostic = rose_cause.diagnostic;
1334 return 0;
1335 }
1336
1337 case SIOCRSSL2CALL:
1338 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1339 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1340 ax25_listen_release(&rose_callsign, NULL);
1341 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1342 return -EFAULT;
1343 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1344 return ax25_listen_register(&rose_callsign, NULL);
1345
1346 return 0;
1347
1348 case SIOCRSGL2CALL:
1349 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1350
1351 case SIOCRSACCEPT:
1352 if (rose->state == ROSE_STATE_5) {
1353 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1354 rose_start_idletimer(sk);
1355 rose->condition = 0x00;
1356 rose->vs = 0;
1357 rose->va = 0;
1358 rose->vr = 0;
1359 rose->vl = 0;
1360 rose->state = ROSE_STATE_3;
1361 }
1362 return 0;
1363
1364 default:
1365 return -ENOIOCTLCMD;
1366 }
1367
1368 return 0;
1369 }
1370
1371 #ifdef CONFIG_PROC_FS
rose_info_start(struct seq_file * seq,loff_t * pos)1372 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1373 __acquires(rose_list_lock)
1374 {
1375 spin_lock_bh(&rose_list_lock);
1376 return seq_hlist_start_head(&rose_list, *pos);
1377 }
1378
rose_info_next(struct seq_file * seq,void * v,loff_t * pos)1379 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1380 {
1381 return seq_hlist_next(v, &rose_list, pos);
1382 }
1383
rose_info_stop(struct seq_file * seq,void * v)1384 static void rose_info_stop(struct seq_file *seq, void *v)
1385 __releases(rose_list_lock)
1386 {
1387 spin_unlock_bh(&rose_list_lock);
1388 }
1389
rose_info_show(struct seq_file * seq,void * v)1390 static int rose_info_show(struct seq_file *seq, void *v)
1391 {
1392 char buf[11], rsbuf[11];
1393
1394 if (v == SEQ_START_TOKEN)
1395 seq_puts(seq,
1396 "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");
1397
1398 else {
1399 struct sock *s = sk_entry(v);
1400 struct rose_sock *rose = rose_sk(s);
1401 const char *devname, *callsign;
1402 const struct net_device *dev = rose->device;
1403
1404 if (!dev)
1405 devname = "???";
1406 else
1407 devname = dev->name;
1408
1409 seq_printf(seq, "%-10s %-9s ",
1410 rose2asc(rsbuf, &rose->dest_addr),
1411 ax2asc(buf, &rose->dest_call));
1412
1413 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1414 callsign = "??????-?";
1415 else
1416 callsign = ax2asc(buf, &rose->source_call);
1417
1418 seq_printf(seq,
1419 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1420 rose2asc(rsbuf, &rose->source_addr),
1421 callsign,
1422 devname,
1423 rose->lci & 0x0FFF,
1424 (rose->neighbour) ? rose->neighbour->number : 0,
1425 rose->state,
1426 rose->vs,
1427 rose->vr,
1428 rose->va,
1429 ax25_display_timer(&rose->timer) / HZ,
1430 rose->t1 / HZ,
1431 rose->t2 / HZ,
1432 rose->t3 / HZ,
1433 rose->hb / HZ,
1434 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1435 rose->idle / (60 * HZ),
1436 sk_wmem_alloc_get(s),
1437 sk_rmem_alloc_get(s),
1438 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1439 }
1440
1441 return 0;
1442 }
1443
1444 static const struct seq_operations rose_info_seqops = {
1445 .start = rose_info_start,
1446 .next = rose_info_next,
1447 .stop = rose_info_stop,
1448 .show = rose_info_show,
1449 };
1450 #endif /* CONFIG_PROC_FS */
1451
1452 static const struct net_proto_family rose_family_ops = {
1453 .family = PF_ROSE,
1454 .create = rose_create,
1455 .owner = THIS_MODULE,
1456 };
1457
1458 static const struct proto_ops rose_proto_ops = {
1459 .family = PF_ROSE,
1460 .owner = THIS_MODULE,
1461 .release = rose_release,
1462 .bind = rose_bind,
1463 .connect = rose_connect,
1464 .socketpair = sock_no_socketpair,
1465 .accept = rose_accept,
1466 .getname = rose_getname,
1467 .poll = datagram_poll,
1468 .ioctl = rose_ioctl,
1469 .gettstamp = sock_gettstamp,
1470 .listen = rose_listen,
1471 .shutdown = sock_no_shutdown,
1472 .setsockopt = rose_setsockopt,
1473 .getsockopt = rose_getsockopt,
1474 .sendmsg = rose_sendmsg,
1475 .recvmsg = rose_recvmsg,
1476 .mmap = sock_no_mmap,
1477 .sendpage = sock_no_sendpage,
1478 };
1479
1480 static struct notifier_block rose_dev_notifier = {
1481 .notifier_call = rose_device_event,
1482 };
1483
1484 static struct net_device **dev_rose;
1485
1486 static struct ax25_protocol rose_pid = {
1487 .pid = AX25_P_ROSE,
1488 .func = rose_route_frame
1489 };
1490
1491 static struct ax25_linkfail rose_linkfail_notifier = {
1492 .func = rose_link_failed
1493 };
1494
rose_proto_init(void)1495 static int __init rose_proto_init(void)
1496 {
1497 int i;
1498 int rc;
1499
1500 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1501 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter too large\n");
1502 rc = -EINVAL;
1503 goto out;
1504 }
1505
1506 rc = proto_register(&rose_proto, 0);
1507 if (rc != 0)
1508 goto out;
1509
1510 rose_callsign = null_ax25_address;
1511
1512 dev_rose = kcalloc(rose_ndevs, sizeof(struct net_device *),
1513 GFP_KERNEL);
1514 if (dev_rose == NULL) {
1515 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1516 rc = -ENOMEM;
1517 goto out_proto_unregister;
1518 }
1519
1520 for (i = 0; i < rose_ndevs; i++) {
1521 struct net_device *dev;
1522 char name[IFNAMSIZ];
1523
1524 sprintf(name, "rose%d", i);
1525 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1526 if (!dev) {
1527 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1528 rc = -ENOMEM;
1529 goto fail;
1530 }
1531 rc = register_netdev(dev);
1532 if (rc) {
1533 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1534 free_netdev(dev);
1535 goto fail;
1536 }
1537 rose_set_lockdep_key(dev);
1538 dev_rose[i] = dev;
1539 }
1540
1541 sock_register(&rose_family_ops);
1542 register_netdevice_notifier(&rose_dev_notifier);
1543
1544 ax25_register_pid(&rose_pid);
1545 ax25_linkfail_register(&rose_linkfail_notifier);
1546
1547 #ifdef CONFIG_SYSCTL
1548 rose_register_sysctl();
1549 #endif
1550 rose_loopback_init();
1551
1552 rose_add_loopback_neigh();
1553
1554 proc_create_seq("rose", 0444, init_net.proc_net, &rose_info_seqops);
1555 proc_create_seq("rose_neigh", 0444, init_net.proc_net,
1556 &rose_neigh_seqops);
1557 proc_create_seq("rose_nodes", 0444, init_net.proc_net,
1558 &rose_node_seqops);
1559 proc_create_seq("rose_routes", 0444, init_net.proc_net,
1560 &rose_route_seqops);
1561 out:
1562 return rc;
1563 fail:
1564 while (--i >= 0) {
1565 unregister_netdev(dev_rose[i]);
1566 free_netdev(dev_rose[i]);
1567 }
1568 kfree(dev_rose);
1569 out_proto_unregister:
1570 proto_unregister(&rose_proto);
1571 goto out;
1572 }
1573 module_init(rose_proto_init);
1574
1575 module_param(rose_ndevs, int, 0);
1576 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1577
1578 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1579 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1580 MODULE_LICENSE("GPL");
1581 MODULE_ALIAS_NETPROTO(PF_ROSE);
1582
rose_exit(void)1583 static void __exit rose_exit(void)
1584 {
1585 int i;
1586
1587 remove_proc_entry("rose", init_net.proc_net);
1588 remove_proc_entry("rose_neigh", init_net.proc_net);
1589 remove_proc_entry("rose_nodes", init_net.proc_net);
1590 remove_proc_entry("rose_routes", init_net.proc_net);
1591 rose_loopback_clear();
1592
1593 rose_rt_free();
1594
1595 ax25_protocol_release(AX25_P_ROSE);
1596 ax25_linkfail_release(&rose_linkfail_notifier);
1597
1598 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1599 ax25_listen_release(&rose_callsign, NULL);
1600
1601 #ifdef CONFIG_SYSCTL
1602 rose_unregister_sysctl();
1603 #endif
1604 unregister_netdevice_notifier(&rose_dev_notifier);
1605
1606 sock_unregister(PF_ROSE);
1607
1608 for (i = 0; i < rose_ndevs; i++) {
1609 struct net_device *dev = dev_rose[i];
1610
1611 if (dev) {
1612 unregister_netdev(dev);
1613 free_netdev(dev);
1614 }
1615 }
1616
1617 kfree(dev_rose);
1618 proto_unregister(&rose_proto);
1619 }
1620
1621 module_exit(rose_exit);
1622