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 netdev_put(rose->device, &rose->dev_tracker);
196 rose->device = NULL;
197 }
198 }
199 spin_unlock_bh(&rose_list_lock);
200 }
201
202 /*
203 * Handle device status changes.
204 */
rose_device_event(struct notifier_block * this,unsigned long event,void * ptr)205 static int rose_device_event(struct notifier_block *this,
206 unsigned long event, void *ptr)
207 {
208 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
209
210 if (!net_eq(dev_net(dev), &init_net))
211 return NOTIFY_DONE;
212
213 if (event != NETDEV_DOWN)
214 return NOTIFY_DONE;
215
216 switch (dev->type) {
217 case ARPHRD_ROSE:
218 rose_kill_by_device(dev);
219 break;
220 case ARPHRD_AX25:
221 rose_link_device_down(dev);
222 rose_rt_device_down(dev);
223 break;
224 }
225
226 return NOTIFY_DONE;
227 }
228
229 /*
230 * Add a socket to the bound sockets list.
231 */
rose_insert_socket(struct sock * sk)232 static void rose_insert_socket(struct sock *sk)
233 {
234
235 spin_lock_bh(&rose_list_lock);
236 sk_add_node(sk, &rose_list);
237 spin_unlock_bh(&rose_list_lock);
238 }
239
240 /*
241 * Find a socket that wants to accept the Call Request we just
242 * received.
243 */
rose_find_listener(rose_address * addr,ax25_address * call)244 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
245 {
246 struct sock *s;
247
248 spin_lock_bh(&rose_list_lock);
249 sk_for_each(s, &rose_list) {
250 struct rose_sock *rose = rose_sk(s);
251
252 if (!rosecmp(&rose->source_addr, addr) &&
253 !ax25cmp(&rose->source_call, call) &&
254 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
255 goto found;
256 }
257
258 sk_for_each(s, &rose_list) {
259 struct rose_sock *rose = rose_sk(s);
260
261 if (!rosecmp(&rose->source_addr, addr) &&
262 !ax25cmp(&rose->source_call, &null_ax25_address) &&
263 s->sk_state == TCP_LISTEN)
264 goto found;
265 }
266 s = NULL;
267 found:
268 spin_unlock_bh(&rose_list_lock);
269 return s;
270 }
271
272 /*
273 * Find a connected ROSE socket given my LCI and device.
274 */
rose_find_socket(unsigned int lci,struct rose_neigh * neigh)275 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
276 {
277 struct sock *s;
278
279 spin_lock_bh(&rose_list_lock);
280 sk_for_each(s, &rose_list) {
281 struct rose_sock *rose = rose_sk(s);
282
283 if (rose->lci == lci && rose->neighbour == neigh)
284 goto found;
285 }
286 s = NULL;
287 found:
288 spin_unlock_bh(&rose_list_lock);
289 return s;
290 }
291
292 /*
293 * Find a unique LCI for a given device.
294 */
rose_new_lci(struct rose_neigh * neigh)295 unsigned int rose_new_lci(struct rose_neigh *neigh)
296 {
297 int lci;
298
299 if (neigh->dce_mode) {
300 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
301 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
302 return lci;
303 } else {
304 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
305 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
306 return lci;
307 }
308
309 return 0;
310 }
311
312 /*
313 * Deferred destroy.
314 */
315 void rose_destroy_socket(struct sock *);
316
317 /*
318 * Handler for deferred kills.
319 */
rose_destroy_timer(struct timer_list * t)320 static void rose_destroy_timer(struct timer_list *t)
321 {
322 struct sock *sk = from_timer(sk, t, sk_timer);
323
324 rose_destroy_socket(sk);
325 }
326
327 /*
328 * This is called from user mode and the timers. Thus it protects itself
329 * against interrupt users but doesn't worry about being called during
330 * work. Once it is removed from the queue no interrupt or bottom half
331 * will touch it and we are (fairly 8-) ) safe.
332 */
rose_destroy_socket(struct sock * sk)333 void rose_destroy_socket(struct sock *sk)
334 {
335 struct sk_buff *skb;
336
337 rose_remove_socket(sk);
338 rose_stop_heartbeat(sk);
339 rose_stop_idletimer(sk);
340 rose_stop_timer(sk);
341
342 rose_clear_queues(sk); /* Flush the queues */
343
344 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
345 if (skb->sk != sk) { /* A pending connection */
346 /* Queue the unaccepted socket for death */
347 sock_set_flag(skb->sk, SOCK_DEAD);
348 rose_start_heartbeat(skb->sk);
349 rose_sk(skb->sk)->state = ROSE_STATE_0;
350 }
351
352 kfree_skb(skb);
353 }
354
355 if (sk_has_allocations(sk)) {
356 /* Defer: outstanding buffers */
357 timer_setup(&sk->sk_timer, rose_destroy_timer, 0);
358 sk->sk_timer.expires = jiffies + 10 * HZ;
359 add_timer(&sk->sk_timer);
360 } else
361 sock_put(sk);
362 }
363
364 /*
365 * Handling for system calls applied via the various interfaces to a
366 * ROSE socket object.
367 */
368
rose_setsockopt(struct socket * sock,int level,int optname,sockptr_t optval,unsigned int optlen)369 static int rose_setsockopt(struct socket *sock, int level, int optname,
370 sockptr_t optval, unsigned int optlen)
371 {
372 struct sock *sk = sock->sk;
373 struct rose_sock *rose = rose_sk(sk);
374 int opt;
375
376 if (level != SOL_ROSE)
377 return -ENOPROTOOPT;
378
379 if (optlen < sizeof(int))
380 return -EINVAL;
381
382 if (copy_from_sockptr(&opt, optval, sizeof(int)))
383 return -EFAULT;
384
385 switch (optname) {
386 case ROSE_DEFER:
387 rose->defer = opt ? 1 : 0;
388 return 0;
389
390 case ROSE_T1:
391 if (opt < 1)
392 return -EINVAL;
393 rose->t1 = opt * HZ;
394 return 0;
395
396 case ROSE_T2:
397 if (opt < 1)
398 return -EINVAL;
399 rose->t2 = opt * HZ;
400 return 0;
401
402 case ROSE_T3:
403 if (opt < 1)
404 return -EINVAL;
405 rose->t3 = opt * HZ;
406 return 0;
407
408 case ROSE_HOLDBACK:
409 if (opt < 1)
410 return -EINVAL;
411 rose->hb = opt * HZ;
412 return 0;
413
414 case ROSE_IDLE:
415 if (opt < 0)
416 return -EINVAL;
417 rose->idle = opt * 60 * HZ;
418 return 0;
419
420 case ROSE_QBITINCL:
421 rose->qbitincl = opt ? 1 : 0;
422 return 0;
423
424 default:
425 return -ENOPROTOOPT;
426 }
427 }
428
rose_getsockopt(struct socket * sock,int level,int optname,char __user * optval,int __user * optlen)429 static int rose_getsockopt(struct socket *sock, int level, int optname,
430 char __user *optval, int __user *optlen)
431 {
432 struct sock *sk = sock->sk;
433 struct rose_sock *rose = rose_sk(sk);
434 int val = 0;
435 int len;
436
437 if (level != SOL_ROSE)
438 return -ENOPROTOOPT;
439
440 if (get_user(len, optlen))
441 return -EFAULT;
442
443 if (len < 0)
444 return -EINVAL;
445
446 switch (optname) {
447 case ROSE_DEFER:
448 val = rose->defer;
449 break;
450
451 case ROSE_T1:
452 val = rose->t1 / HZ;
453 break;
454
455 case ROSE_T2:
456 val = rose->t2 / HZ;
457 break;
458
459 case ROSE_T3:
460 val = rose->t3 / HZ;
461 break;
462
463 case ROSE_HOLDBACK:
464 val = rose->hb / HZ;
465 break;
466
467 case ROSE_IDLE:
468 val = rose->idle / (60 * HZ);
469 break;
470
471 case ROSE_QBITINCL:
472 val = rose->qbitincl;
473 break;
474
475 default:
476 return -ENOPROTOOPT;
477 }
478
479 len = min_t(unsigned int, len, sizeof(int));
480
481 if (put_user(len, optlen))
482 return -EFAULT;
483
484 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
485 }
486
rose_listen(struct socket * sock,int backlog)487 static int rose_listen(struct socket *sock, int backlog)
488 {
489 struct sock *sk = sock->sk;
490
491 if (sk->sk_state != TCP_LISTEN) {
492 struct rose_sock *rose = rose_sk(sk);
493
494 rose->dest_ndigis = 0;
495 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
496 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
497 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
498 sk->sk_max_ack_backlog = backlog;
499 sk->sk_state = TCP_LISTEN;
500 return 0;
501 }
502
503 return -EOPNOTSUPP;
504 }
505
506 static struct proto rose_proto = {
507 .name = "ROSE",
508 .owner = THIS_MODULE,
509 .obj_size = sizeof(struct rose_sock),
510 };
511
rose_create(struct net * net,struct socket * sock,int protocol,int kern)512 static int rose_create(struct net *net, struct socket *sock, int protocol,
513 int kern)
514 {
515 struct sock *sk;
516 struct rose_sock *rose;
517
518 if (!net_eq(net, &init_net))
519 return -EAFNOSUPPORT;
520
521 if (sock->type != SOCK_SEQPACKET || protocol != 0)
522 return -ESOCKTNOSUPPORT;
523
524 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
525 if (sk == NULL)
526 return -ENOMEM;
527
528 rose = rose_sk(sk);
529
530 sock_init_data(sock, sk);
531
532 skb_queue_head_init(&rose->ack_queue);
533 #ifdef M_BIT
534 skb_queue_head_init(&rose->frag_queue);
535 rose->fraglen = 0;
536 #endif
537
538 sock->ops = &rose_proto_ops;
539 sk->sk_protocol = protocol;
540
541 timer_setup(&rose->timer, NULL, 0);
542 timer_setup(&rose->idletimer, NULL, 0);
543
544 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
545 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
546 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
547 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
548 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
549
550 rose->state = ROSE_STATE_0;
551
552 return 0;
553 }
554
rose_make_new(struct sock * osk)555 static struct sock *rose_make_new(struct sock *osk)
556 {
557 struct sock *sk;
558 struct rose_sock *rose, *orose;
559
560 if (osk->sk_type != SOCK_SEQPACKET)
561 return NULL;
562
563 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
564 if (sk == NULL)
565 return NULL;
566
567 rose = rose_sk(sk);
568
569 sock_init_data(NULL, sk);
570
571 skb_queue_head_init(&rose->ack_queue);
572 #ifdef M_BIT
573 skb_queue_head_init(&rose->frag_queue);
574 rose->fraglen = 0;
575 #endif
576
577 sk->sk_type = osk->sk_type;
578 sk->sk_priority = osk->sk_priority;
579 sk->sk_protocol = osk->sk_protocol;
580 sk->sk_rcvbuf = osk->sk_rcvbuf;
581 sk->sk_sndbuf = osk->sk_sndbuf;
582 sk->sk_state = TCP_ESTABLISHED;
583 sock_copy_flags(sk, osk);
584
585 timer_setup(&rose->timer, NULL, 0);
586 timer_setup(&rose->idletimer, NULL, 0);
587
588 orose = rose_sk(osk);
589 rose->t1 = orose->t1;
590 rose->t2 = orose->t2;
591 rose->t3 = orose->t3;
592 rose->hb = orose->hb;
593 rose->idle = orose->idle;
594 rose->defer = orose->defer;
595 rose->device = orose->device;
596 if (rose->device)
597 netdev_hold(rose->device, &rose->dev_tracker, GFP_ATOMIC);
598 rose->qbitincl = orose->qbitincl;
599
600 return sk;
601 }
602
rose_release(struct socket * sock)603 static int rose_release(struct socket *sock)
604 {
605 struct sock *sk = sock->sk;
606 struct rose_sock *rose;
607
608 if (sk == NULL) return 0;
609
610 sock_hold(sk);
611 sock_orphan(sk);
612 lock_sock(sk);
613 rose = rose_sk(sk);
614
615 switch (rose->state) {
616 case ROSE_STATE_0:
617 release_sock(sk);
618 rose_disconnect(sk, 0, -1, -1);
619 lock_sock(sk);
620 rose_destroy_socket(sk);
621 break;
622
623 case ROSE_STATE_2:
624 rose->neighbour->use--;
625 release_sock(sk);
626 rose_disconnect(sk, 0, -1, -1);
627 lock_sock(sk);
628 rose_destroy_socket(sk);
629 break;
630
631 case ROSE_STATE_1:
632 case ROSE_STATE_3:
633 case ROSE_STATE_4:
634 case ROSE_STATE_5:
635 rose_clear_queues(sk);
636 rose_stop_idletimer(sk);
637 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
638 rose_start_t3timer(sk);
639 rose->state = ROSE_STATE_2;
640 sk->sk_state = TCP_CLOSE;
641 sk->sk_shutdown |= SEND_SHUTDOWN;
642 sk->sk_state_change(sk);
643 sock_set_flag(sk, SOCK_DEAD);
644 sock_set_flag(sk, SOCK_DESTROY);
645 break;
646
647 default:
648 break;
649 }
650
651 netdev_put(rose->device, &rose->dev_tracker);
652 sock->sk = NULL;
653 release_sock(sk);
654 sock_put(sk);
655
656 return 0;
657 }
658
rose_bind(struct socket * sock,struct sockaddr * uaddr,int addr_len)659 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
660 {
661 struct sock *sk = sock->sk;
662 struct rose_sock *rose = rose_sk(sk);
663 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
664 struct net_device *dev;
665 ax25_address *source;
666 ax25_uid_assoc *user;
667 int n;
668
669 if (!sock_flag(sk, SOCK_ZAPPED))
670 return -EINVAL;
671
672 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
673 return -EINVAL;
674
675 if (addr->srose_family != AF_ROSE)
676 return -EINVAL;
677
678 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
679 return -EINVAL;
680
681 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
682 return -EINVAL;
683
684 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
685 return -EADDRNOTAVAIL;
686
687 source = &addr->srose_call;
688
689 user = ax25_findbyuid(current_euid());
690 if (user) {
691 rose->source_call = user->call;
692 ax25_uid_put(user);
693 } else {
694 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
695 dev_put(dev);
696 return -EACCES;
697 }
698 rose->source_call = *source;
699 }
700
701 rose->source_addr = addr->srose_addr;
702 rose->device = dev;
703 netdev_tracker_alloc(rose->device, &rose->dev_tracker, GFP_KERNEL);
704 rose->source_ndigis = addr->srose_ndigis;
705
706 if (addr_len == sizeof(struct full_sockaddr_rose)) {
707 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
708 for (n = 0 ; n < addr->srose_ndigis ; n++)
709 rose->source_digis[n] = full_addr->srose_digis[n];
710 } else {
711 if (rose->source_ndigis == 1) {
712 rose->source_digis[0] = addr->srose_digi;
713 }
714 }
715
716 rose_insert_socket(sk);
717
718 sock_reset_flag(sk, SOCK_ZAPPED);
719
720 return 0;
721 }
722
rose_connect(struct socket * sock,struct sockaddr * uaddr,int addr_len,int flags)723 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
724 {
725 struct sock *sk = sock->sk;
726 struct rose_sock *rose = rose_sk(sk);
727 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
728 unsigned char cause, diagnostic;
729 ax25_uid_assoc *user;
730 int n, err = 0;
731
732 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
733 return -EINVAL;
734
735 if (addr->srose_family != AF_ROSE)
736 return -EINVAL;
737
738 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
739 return -EINVAL;
740
741 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
742 return -EINVAL;
743
744 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
745 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
746 return -EINVAL;
747
748 lock_sock(sk);
749
750 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
751 /* Connect completed during a ERESTARTSYS event */
752 sock->state = SS_CONNECTED;
753 goto out_release;
754 }
755
756 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
757 sock->state = SS_UNCONNECTED;
758 err = -ECONNREFUSED;
759 goto out_release;
760 }
761
762 if (sk->sk_state == TCP_ESTABLISHED) {
763 /* No reconnect on a seqpacket socket */
764 err = -EISCONN;
765 goto out_release;
766 }
767
768 sk->sk_state = TCP_CLOSE;
769 sock->state = SS_UNCONNECTED;
770
771 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
772 &diagnostic, 0);
773 if (!rose->neighbour) {
774 err = -ENETUNREACH;
775 goto out_release;
776 }
777
778 rose->lci = rose_new_lci(rose->neighbour);
779 if (!rose->lci) {
780 err = -ENETUNREACH;
781 goto out_release;
782 }
783
784 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
785 struct net_device *dev;
786
787 sock_reset_flag(sk, SOCK_ZAPPED);
788
789 dev = rose_dev_first();
790 if (!dev) {
791 err = -ENETUNREACH;
792 goto out_release;
793 }
794
795 user = ax25_findbyuid(current_euid());
796 if (!user) {
797 err = -EINVAL;
798 dev_put(dev);
799 goto out_release;
800 }
801
802 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
803 rose->source_call = user->call;
804 rose->device = dev;
805 netdev_tracker_alloc(rose->device, &rose->dev_tracker,
806 GFP_KERNEL);
807 ax25_uid_put(user);
808
809 rose_insert_socket(sk); /* Finish the bind */
810 }
811 rose->dest_addr = addr->srose_addr;
812 rose->dest_call = addr->srose_call;
813 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
814 rose->dest_ndigis = addr->srose_ndigis;
815
816 if (addr_len == sizeof(struct full_sockaddr_rose)) {
817 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
818 for (n = 0 ; n < addr->srose_ndigis ; n++)
819 rose->dest_digis[n] = full_addr->srose_digis[n];
820 } else {
821 if (rose->dest_ndigis == 1) {
822 rose->dest_digis[0] = addr->srose_digi;
823 }
824 }
825
826 /* Move to connecting socket, start sending Connect Requests */
827 sock->state = SS_CONNECTING;
828 sk->sk_state = TCP_SYN_SENT;
829
830 rose->state = ROSE_STATE_1;
831
832 rose->neighbour->use++;
833
834 rose_write_internal(sk, ROSE_CALL_REQUEST);
835 rose_start_heartbeat(sk);
836 rose_start_t1timer(sk);
837
838 /* Now the loop */
839 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
840 err = -EINPROGRESS;
841 goto out_release;
842 }
843
844 /*
845 * A Connect Ack with Choke or timeout or failed routing will go to
846 * closed.
847 */
848 if (sk->sk_state == TCP_SYN_SENT) {
849 DEFINE_WAIT(wait);
850
851 for (;;) {
852 prepare_to_wait(sk_sleep(sk), &wait,
853 TASK_INTERRUPTIBLE);
854 if (sk->sk_state != TCP_SYN_SENT)
855 break;
856 if (!signal_pending(current)) {
857 release_sock(sk);
858 schedule();
859 lock_sock(sk);
860 continue;
861 }
862 err = -ERESTARTSYS;
863 break;
864 }
865 finish_wait(sk_sleep(sk), &wait);
866
867 if (err)
868 goto out_release;
869 }
870
871 if (sk->sk_state != TCP_ESTABLISHED) {
872 sock->state = SS_UNCONNECTED;
873 err = sock_error(sk); /* Always set at this point */
874 goto out_release;
875 }
876
877 sock->state = SS_CONNECTED;
878
879 out_release:
880 release_sock(sk);
881
882 return err;
883 }
884
rose_accept(struct socket * sock,struct socket * newsock,int flags,bool kern)885 static int rose_accept(struct socket *sock, struct socket *newsock, int flags,
886 bool kern)
887 {
888 struct sk_buff *skb;
889 struct sock *newsk;
890 DEFINE_WAIT(wait);
891 struct sock *sk;
892 int err = 0;
893
894 if ((sk = sock->sk) == NULL)
895 return -EINVAL;
896
897 lock_sock(sk);
898 if (sk->sk_type != SOCK_SEQPACKET) {
899 err = -EOPNOTSUPP;
900 goto out_release;
901 }
902
903 if (sk->sk_state != TCP_LISTEN) {
904 err = -EINVAL;
905 goto out_release;
906 }
907
908 /*
909 * The write queue this time is holding sockets ready to use
910 * hooked into the SABM we saved
911 */
912 for (;;) {
913 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
914
915 skb = skb_dequeue(&sk->sk_receive_queue);
916 if (skb)
917 break;
918
919 if (flags & O_NONBLOCK) {
920 err = -EWOULDBLOCK;
921 break;
922 }
923 if (!signal_pending(current)) {
924 release_sock(sk);
925 schedule();
926 lock_sock(sk);
927 continue;
928 }
929 err = -ERESTARTSYS;
930 break;
931 }
932 finish_wait(sk_sleep(sk), &wait);
933 if (err)
934 goto out_release;
935
936 newsk = skb->sk;
937 sock_graft(newsk, newsock);
938
939 /* Now attach up the new socket */
940 skb->sk = NULL;
941 kfree_skb(skb);
942 sk_acceptq_removed(sk);
943
944 out_release:
945 release_sock(sk);
946
947 return err;
948 }
949
rose_getname(struct socket * sock,struct sockaddr * uaddr,int peer)950 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
951 int peer)
952 {
953 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
954 struct sock *sk = sock->sk;
955 struct rose_sock *rose = rose_sk(sk);
956 int n;
957
958 memset(srose, 0, sizeof(*srose));
959 if (peer != 0) {
960 if (sk->sk_state != TCP_ESTABLISHED)
961 return -ENOTCONN;
962 srose->srose_family = AF_ROSE;
963 srose->srose_addr = rose->dest_addr;
964 srose->srose_call = rose->dest_call;
965 srose->srose_ndigis = rose->dest_ndigis;
966 for (n = 0; n < rose->dest_ndigis; n++)
967 srose->srose_digis[n] = rose->dest_digis[n];
968 } else {
969 srose->srose_family = AF_ROSE;
970 srose->srose_addr = rose->source_addr;
971 srose->srose_call = rose->source_call;
972 srose->srose_ndigis = rose->source_ndigis;
973 for (n = 0; n < rose->source_ndigis; n++)
974 srose->srose_digis[n] = rose->source_digis[n];
975 }
976
977 return sizeof(struct full_sockaddr_rose);
978 }
979
rose_rx_call_request(struct sk_buff * skb,struct net_device * dev,struct rose_neigh * neigh,unsigned int lci)980 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
981 {
982 struct sock *sk;
983 struct sock *make;
984 struct rose_sock *make_rose;
985 struct rose_facilities_struct facilities;
986 int n;
987
988 skb->sk = NULL; /* Initially we don't know who it's for */
989
990 /*
991 * skb->data points to the rose frame start
992 */
993 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
994
995 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
996 skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
997 &facilities)) {
998 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
999 return 0;
1000 }
1001
1002 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1003
1004 /*
1005 * We can't accept the Call Request.
1006 */
1007 if (sk == NULL || sk_acceptq_is_full(sk) ||
1008 (make = rose_make_new(sk)) == NULL) {
1009 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1010 return 0;
1011 }
1012
1013 skb->sk = make;
1014 make->sk_state = TCP_ESTABLISHED;
1015 make_rose = rose_sk(make);
1016
1017 make_rose->lci = lci;
1018 make_rose->dest_addr = facilities.dest_addr;
1019 make_rose->dest_call = facilities.dest_call;
1020 make_rose->dest_ndigis = facilities.dest_ndigis;
1021 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1022 make_rose->dest_digis[n] = facilities.dest_digis[n];
1023 make_rose->source_addr = facilities.source_addr;
1024 make_rose->source_call = facilities.source_call;
1025 make_rose->source_ndigis = facilities.source_ndigis;
1026 for (n = 0 ; n < facilities.source_ndigis ; n++)
1027 make_rose->source_digis[n] = facilities.source_digis[n];
1028 make_rose->neighbour = neigh;
1029 make_rose->device = dev;
1030 /* Caller got a reference for us. */
1031 netdev_tracker_alloc(make_rose->device, &make_rose->dev_tracker,
1032 GFP_ATOMIC);
1033 make_rose->facilities = facilities;
1034
1035 make_rose->neighbour->use++;
1036
1037 if (rose_sk(sk)->defer) {
1038 make_rose->state = ROSE_STATE_5;
1039 } else {
1040 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1041 make_rose->state = ROSE_STATE_3;
1042 rose_start_idletimer(make);
1043 }
1044
1045 make_rose->condition = 0x00;
1046 make_rose->vs = 0;
1047 make_rose->va = 0;
1048 make_rose->vr = 0;
1049 make_rose->vl = 0;
1050 sk_acceptq_added(sk);
1051
1052 rose_insert_socket(make);
1053
1054 skb_queue_head(&sk->sk_receive_queue, skb);
1055
1056 rose_start_heartbeat(make);
1057
1058 if (!sock_flag(sk, SOCK_DEAD))
1059 sk->sk_data_ready(sk);
1060
1061 return 1;
1062 }
1063
rose_sendmsg(struct socket * sock,struct msghdr * msg,size_t len)1064 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1065 {
1066 struct sock *sk = sock->sk;
1067 struct rose_sock *rose = rose_sk(sk);
1068 DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1069 int err;
1070 struct full_sockaddr_rose srose;
1071 struct sk_buff *skb;
1072 unsigned char *asmptr;
1073 int n, size, qbit = 0;
1074
1075 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1076 return -EINVAL;
1077
1078 if (sock_flag(sk, SOCK_ZAPPED))
1079 return -EADDRNOTAVAIL;
1080
1081 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1082 send_sig(SIGPIPE, current, 0);
1083 return -EPIPE;
1084 }
1085
1086 if (rose->neighbour == NULL || rose->device == NULL)
1087 return -ENETUNREACH;
1088
1089 if (usrose != NULL) {
1090 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1091 return -EINVAL;
1092 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1093 memcpy(&srose, usrose, msg->msg_namelen);
1094 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1095 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1096 return -EISCONN;
1097 if (srose.srose_ndigis != rose->dest_ndigis)
1098 return -EISCONN;
1099 if (srose.srose_ndigis == rose->dest_ndigis) {
1100 for (n = 0 ; n < srose.srose_ndigis ; n++)
1101 if (ax25cmp(&rose->dest_digis[n],
1102 &srose.srose_digis[n]))
1103 return -EISCONN;
1104 }
1105 if (srose.srose_family != AF_ROSE)
1106 return -EINVAL;
1107 } else {
1108 if (sk->sk_state != TCP_ESTABLISHED)
1109 return -ENOTCONN;
1110
1111 srose.srose_family = AF_ROSE;
1112 srose.srose_addr = rose->dest_addr;
1113 srose.srose_call = rose->dest_call;
1114 srose.srose_ndigis = rose->dest_ndigis;
1115 for (n = 0 ; n < rose->dest_ndigis ; n++)
1116 srose.srose_digis[n] = rose->dest_digis[n];
1117 }
1118
1119 /* Build a packet */
1120 /* Sanity check the packet size */
1121 if (len > 65535)
1122 return -EMSGSIZE;
1123
1124 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1125
1126 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1127 return err;
1128
1129 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1130
1131 /*
1132 * Put the data on the end
1133 */
1134
1135 skb_reset_transport_header(skb);
1136 skb_put(skb, len);
1137
1138 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1139 if (err) {
1140 kfree_skb(skb);
1141 return err;
1142 }
1143
1144 /*
1145 * If the Q BIT Include socket option is in force, the first
1146 * byte of the user data is the logical value of the Q Bit.
1147 */
1148 if (rose->qbitincl) {
1149 qbit = skb->data[0];
1150 skb_pull(skb, 1);
1151 }
1152
1153 /*
1154 * Push down the ROSE header
1155 */
1156 asmptr = skb_push(skb, ROSE_MIN_LEN);
1157
1158 /* Build a ROSE Network header */
1159 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1160 asmptr[1] = (rose->lci >> 0) & 0xFF;
1161 asmptr[2] = ROSE_DATA;
1162
1163 if (qbit)
1164 asmptr[0] |= ROSE_Q_BIT;
1165
1166 if (sk->sk_state != TCP_ESTABLISHED) {
1167 kfree_skb(skb);
1168 return -ENOTCONN;
1169 }
1170
1171 #ifdef M_BIT
1172 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1173 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1174 unsigned char header[ROSE_MIN_LEN];
1175 struct sk_buff *skbn;
1176 int frontlen;
1177 int lg;
1178
1179 /* Save a copy of the Header */
1180 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1181 skb_pull(skb, ROSE_MIN_LEN);
1182
1183 frontlen = skb_headroom(skb);
1184
1185 while (skb->len > 0) {
1186 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1187 kfree_skb(skb);
1188 return err;
1189 }
1190
1191 skbn->sk = sk;
1192 skbn->free = 1;
1193 skbn->arp = 1;
1194
1195 skb_reserve(skbn, frontlen);
1196
1197 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1198
1199 /* Copy the user data */
1200 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1201 skb_pull(skb, lg);
1202
1203 /* Duplicate the Header */
1204 skb_push(skbn, ROSE_MIN_LEN);
1205 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1206
1207 if (skb->len > 0)
1208 skbn->data[2] |= M_BIT;
1209
1210 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1211 }
1212
1213 skb->free = 1;
1214 kfree_skb(skb);
1215 } else {
1216 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1217 }
1218 #else
1219 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1220 #endif
1221
1222 rose_kick(sk);
1223
1224 return len;
1225 }
1226
1227
rose_recvmsg(struct socket * sock,struct msghdr * msg,size_t size,int flags)1228 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1229 int flags)
1230 {
1231 struct sock *sk = sock->sk;
1232 struct rose_sock *rose = rose_sk(sk);
1233 size_t copied;
1234 unsigned char *asmptr;
1235 struct sk_buff *skb;
1236 int n, er, qbit;
1237
1238 /*
1239 * This works for seqpacket too. The receiver has ordered the queue for
1240 * us! We do one quick check first though
1241 */
1242 if (sk->sk_state != TCP_ESTABLISHED)
1243 return -ENOTCONN;
1244
1245 /* Now we can treat all alike */
1246 skb = skb_recv_datagram(sk, flags, &er);
1247 if (!skb)
1248 return er;
1249
1250 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1251
1252 skb_pull(skb, ROSE_MIN_LEN);
1253
1254 if (rose->qbitincl) {
1255 asmptr = skb_push(skb, 1);
1256 *asmptr = qbit;
1257 }
1258
1259 skb_reset_transport_header(skb);
1260 copied = skb->len;
1261
1262 if (copied > size) {
1263 copied = size;
1264 msg->msg_flags |= MSG_TRUNC;
1265 }
1266
1267 skb_copy_datagram_msg(skb, 0, msg, copied);
1268
1269 if (msg->msg_name) {
1270 struct sockaddr_rose *srose;
1271 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1272 msg->msg_name);
1273
1274 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1275 srose = msg->msg_name;
1276 srose->srose_family = AF_ROSE;
1277 srose->srose_addr = rose->dest_addr;
1278 srose->srose_call = rose->dest_call;
1279 srose->srose_ndigis = rose->dest_ndigis;
1280 for (n = 0 ; n < rose->dest_ndigis ; n++)
1281 full_srose->srose_digis[n] = rose->dest_digis[n];
1282 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1283 }
1284
1285 skb_free_datagram(sk, skb);
1286
1287 return copied;
1288 }
1289
1290
rose_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)1291 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1292 {
1293 struct sock *sk = sock->sk;
1294 struct rose_sock *rose = rose_sk(sk);
1295 void __user *argp = (void __user *)arg;
1296
1297 switch (cmd) {
1298 case TIOCOUTQ: {
1299 long amount;
1300
1301 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1302 if (amount < 0)
1303 amount = 0;
1304 return put_user(amount, (unsigned int __user *) argp);
1305 }
1306
1307 case TIOCINQ: {
1308 struct sk_buff *skb;
1309 long amount = 0L;
1310 /* These two are safe on a single CPU system as only user tasks fiddle here */
1311 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1312 amount = skb->len;
1313 return put_user(amount, (unsigned int __user *) argp);
1314 }
1315
1316 case SIOCGIFADDR:
1317 case SIOCSIFADDR:
1318 case SIOCGIFDSTADDR:
1319 case SIOCSIFDSTADDR:
1320 case SIOCGIFBRDADDR:
1321 case SIOCSIFBRDADDR:
1322 case SIOCGIFNETMASK:
1323 case SIOCSIFNETMASK:
1324 case SIOCGIFMETRIC:
1325 case SIOCSIFMETRIC:
1326 return -EINVAL;
1327
1328 case SIOCADDRT:
1329 case SIOCDELRT:
1330 case SIOCRSCLRRT:
1331 if (!capable(CAP_NET_ADMIN))
1332 return -EPERM;
1333 return rose_rt_ioctl(cmd, argp);
1334
1335 case SIOCRSGCAUSE: {
1336 struct rose_cause_struct rose_cause;
1337 rose_cause.cause = rose->cause;
1338 rose_cause.diagnostic = rose->diagnostic;
1339 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1340 }
1341
1342 case SIOCRSSCAUSE: {
1343 struct rose_cause_struct rose_cause;
1344 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1345 return -EFAULT;
1346 rose->cause = rose_cause.cause;
1347 rose->diagnostic = rose_cause.diagnostic;
1348 return 0;
1349 }
1350
1351 case SIOCRSSL2CALL:
1352 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1353 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1354 ax25_listen_release(&rose_callsign, NULL);
1355 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1356 return -EFAULT;
1357 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1358 return ax25_listen_register(&rose_callsign, NULL);
1359
1360 return 0;
1361
1362 case SIOCRSGL2CALL:
1363 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1364
1365 case SIOCRSACCEPT:
1366 if (rose->state == ROSE_STATE_5) {
1367 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1368 rose_start_idletimer(sk);
1369 rose->condition = 0x00;
1370 rose->vs = 0;
1371 rose->va = 0;
1372 rose->vr = 0;
1373 rose->vl = 0;
1374 rose->state = ROSE_STATE_3;
1375 }
1376 return 0;
1377
1378 default:
1379 return -ENOIOCTLCMD;
1380 }
1381
1382 return 0;
1383 }
1384
1385 #ifdef CONFIG_PROC_FS
rose_info_start(struct seq_file * seq,loff_t * pos)1386 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1387 __acquires(rose_list_lock)
1388 {
1389 spin_lock_bh(&rose_list_lock);
1390 return seq_hlist_start_head(&rose_list, *pos);
1391 }
1392
rose_info_next(struct seq_file * seq,void * v,loff_t * pos)1393 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1394 {
1395 return seq_hlist_next(v, &rose_list, pos);
1396 }
1397
rose_info_stop(struct seq_file * seq,void * v)1398 static void rose_info_stop(struct seq_file *seq, void *v)
1399 __releases(rose_list_lock)
1400 {
1401 spin_unlock_bh(&rose_list_lock);
1402 }
1403
rose_info_show(struct seq_file * seq,void * v)1404 static int rose_info_show(struct seq_file *seq, void *v)
1405 {
1406 char buf[11], rsbuf[11];
1407
1408 if (v == SEQ_START_TOKEN)
1409 seq_puts(seq,
1410 "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");
1411
1412 else {
1413 struct sock *s = sk_entry(v);
1414 struct rose_sock *rose = rose_sk(s);
1415 const char *devname, *callsign;
1416 const struct net_device *dev = rose->device;
1417
1418 if (!dev)
1419 devname = "???";
1420 else
1421 devname = dev->name;
1422
1423 seq_printf(seq, "%-10s %-9s ",
1424 rose2asc(rsbuf, &rose->dest_addr),
1425 ax2asc(buf, &rose->dest_call));
1426
1427 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1428 callsign = "??????-?";
1429 else
1430 callsign = ax2asc(buf, &rose->source_call);
1431
1432 seq_printf(seq,
1433 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1434 rose2asc(rsbuf, &rose->source_addr),
1435 callsign,
1436 devname,
1437 rose->lci & 0x0FFF,
1438 (rose->neighbour) ? rose->neighbour->number : 0,
1439 rose->state,
1440 rose->vs,
1441 rose->vr,
1442 rose->va,
1443 ax25_display_timer(&rose->timer) / HZ,
1444 rose->t1 / HZ,
1445 rose->t2 / HZ,
1446 rose->t3 / HZ,
1447 rose->hb / HZ,
1448 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1449 rose->idle / (60 * HZ),
1450 sk_wmem_alloc_get(s),
1451 sk_rmem_alloc_get(s),
1452 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1453 }
1454
1455 return 0;
1456 }
1457
1458 static const struct seq_operations rose_info_seqops = {
1459 .start = rose_info_start,
1460 .next = rose_info_next,
1461 .stop = rose_info_stop,
1462 .show = rose_info_show,
1463 };
1464 #endif /* CONFIG_PROC_FS */
1465
1466 static const struct net_proto_family rose_family_ops = {
1467 .family = PF_ROSE,
1468 .create = rose_create,
1469 .owner = THIS_MODULE,
1470 };
1471
1472 static const struct proto_ops rose_proto_ops = {
1473 .family = PF_ROSE,
1474 .owner = THIS_MODULE,
1475 .release = rose_release,
1476 .bind = rose_bind,
1477 .connect = rose_connect,
1478 .socketpair = sock_no_socketpair,
1479 .accept = rose_accept,
1480 .getname = rose_getname,
1481 .poll = datagram_poll,
1482 .ioctl = rose_ioctl,
1483 .gettstamp = sock_gettstamp,
1484 .listen = rose_listen,
1485 .shutdown = sock_no_shutdown,
1486 .setsockopt = rose_setsockopt,
1487 .getsockopt = rose_getsockopt,
1488 .sendmsg = rose_sendmsg,
1489 .recvmsg = rose_recvmsg,
1490 .mmap = sock_no_mmap,
1491 .sendpage = sock_no_sendpage,
1492 };
1493
1494 static struct notifier_block rose_dev_notifier = {
1495 .notifier_call = rose_device_event,
1496 };
1497
1498 static struct net_device **dev_rose;
1499
1500 static struct ax25_protocol rose_pid = {
1501 .pid = AX25_P_ROSE,
1502 .func = rose_route_frame
1503 };
1504
1505 static struct ax25_linkfail rose_linkfail_notifier = {
1506 .func = rose_link_failed
1507 };
1508
rose_proto_init(void)1509 static int __init rose_proto_init(void)
1510 {
1511 int i;
1512 int rc;
1513
1514 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1515 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter too large\n");
1516 rc = -EINVAL;
1517 goto out;
1518 }
1519
1520 rc = proto_register(&rose_proto, 0);
1521 if (rc != 0)
1522 goto out;
1523
1524 rose_callsign = null_ax25_address;
1525
1526 dev_rose = kcalloc(rose_ndevs, sizeof(struct net_device *),
1527 GFP_KERNEL);
1528 if (dev_rose == NULL) {
1529 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1530 rc = -ENOMEM;
1531 goto out_proto_unregister;
1532 }
1533
1534 for (i = 0; i < rose_ndevs; i++) {
1535 struct net_device *dev;
1536 char name[IFNAMSIZ];
1537
1538 sprintf(name, "rose%d", i);
1539 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1540 if (!dev) {
1541 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1542 rc = -ENOMEM;
1543 goto fail;
1544 }
1545 rc = register_netdev(dev);
1546 if (rc) {
1547 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1548 free_netdev(dev);
1549 goto fail;
1550 }
1551 rose_set_lockdep_key(dev);
1552 dev_rose[i] = dev;
1553 }
1554
1555 sock_register(&rose_family_ops);
1556 register_netdevice_notifier(&rose_dev_notifier);
1557
1558 ax25_register_pid(&rose_pid);
1559 ax25_linkfail_register(&rose_linkfail_notifier);
1560
1561 #ifdef CONFIG_SYSCTL
1562 rose_register_sysctl();
1563 #endif
1564 rose_loopback_init();
1565
1566 rose_add_loopback_neigh();
1567
1568 proc_create_seq("rose", 0444, init_net.proc_net, &rose_info_seqops);
1569 proc_create_seq("rose_neigh", 0444, init_net.proc_net,
1570 &rose_neigh_seqops);
1571 proc_create_seq("rose_nodes", 0444, init_net.proc_net,
1572 &rose_node_seqops);
1573 proc_create_seq("rose_routes", 0444, init_net.proc_net,
1574 &rose_route_seqops);
1575 out:
1576 return rc;
1577 fail:
1578 while (--i >= 0) {
1579 unregister_netdev(dev_rose[i]);
1580 free_netdev(dev_rose[i]);
1581 }
1582 kfree(dev_rose);
1583 out_proto_unregister:
1584 proto_unregister(&rose_proto);
1585 goto out;
1586 }
1587 module_init(rose_proto_init);
1588
1589 module_param(rose_ndevs, int, 0);
1590 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1591
1592 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1593 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1594 MODULE_LICENSE("GPL");
1595 MODULE_ALIAS_NETPROTO(PF_ROSE);
1596
rose_exit(void)1597 static void __exit rose_exit(void)
1598 {
1599 int i;
1600
1601 remove_proc_entry("rose", init_net.proc_net);
1602 remove_proc_entry("rose_neigh", init_net.proc_net);
1603 remove_proc_entry("rose_nodes", init_net.proc_net);
1604 remove_proc_entry("rose_routes", init_net.proc_net);
1605 rose_loopback_clear();
1606
1607 rose_rt_free();
1608
1609 ax25_protocol_release(AX25_P_ROSE);
1610 ax25_linkfail_release(&rose_linkfail_notifier);
1611
1612 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1613 ax25_listen_release(&rose_callsign, NULL);
1614
1615 #ifdef CONFIG_SYSCTL
1616 rose_unregister_sysctl();
1617 #endif
1618 unregister_netdevice_notifier(&rose_dev_notifier);
1619
1620 sock_unregister(PF_ROSE);
1621
1622 for (i = 0; i < rose_ndevs; i++) {
1623 struct net_device *dev = dev_rose[i];
1624
1625 if (dev) {
1626 unregister_netdev(dev);
1627 free_netdev(dev);
1628 }
1629 }
1630
1631 kfree(dev_rose);
1632 proto_unregister(&rose_proto);
1633 }
1634
1635 module_exit(rose_exit);
1636