1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 *
4 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
5 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
6 * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
7 * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
8 */
9
10 #include <linux/capability.h>
11 #include <linux/module.h>
12 #include <linux/moduleparam.h>
13 #include <linux/init.h>
14 #include <linux/errno.h>
15 #include <linux/types.h>
16 #include <linux/socket.h>
17 #include <linux/in.h>
18 #include <linux/slab.h>
19 #include <linux/kernel.h>
20 #include <linux/sched/signal.h>
21 #include <linux/spinlock.h>
22 #include <linux/timer.h>
23 #include <linux/string.h>
24 #include <linux/sockios.h>
25 #include <linux/net.h>
26 #include <linux/stat.h>
27 #include <net/net_namespace.h>
28 #include <net/ax25.h>
29 #include <linux/inet.h>
30 #include <linux/netdevice.h>
31 #include <linux/if_arp.h>
32 #include <linux/skbuff.h>
33 #include <net/sock.h>
34 #include <linux/uaccess.h>
35 #include <linux/fcntl.h>
36 #include <linux/termios.h>
37 #include <linux/mm.h>
38 #include <linux/interrupt.h>
39 #include <linux/notifier.h>
40 #include <net/rose.h>
41 #include <linux/proc_fs.h>
42 #include <linux/seq_file.h>
43 #include <net/tcp_states.h>
44 #include <net/ip.h>
45 #include <net/arp.h>
46
47 static int rose_ndevs = 10;
48
49 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
50 int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
51 int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
52 int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
53 int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
54 int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
55 int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
56 int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
57 int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
58 int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
59
60 static HLIST_HEAD(rose_list);
61 static DEFINE_SPINLOCK(rose_list_lock);
62
63 static const struct proto_ops rose_proto_ops;
64
65 ax25_address rose_callsign;
66
67 /*
68 * ROSE network devices are virtual network devices encapsulating ROSE
69 * frames into AX.25 which will be sent through an AX.25 device, so form a
70 * special "super class" of normal net devices; split their locks off into a
71 * separate class since they always nest.
72 */
73 static struct lock_class_key rose_netdev_xmit_lock_key;
74 static struct lock_class_key rose_netdev_addr_lock_key;
75
rose_set_lockdep_one(struct net_device * dev,struct netdev_queue * txq,void * _unused)76 static void rose_set_lockdep_one(struct net_device *dev,
77 struct netdev_queue *txq,
78 void *_unused)
79 {
80 lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
81 }
82
rose_set_lockdep_key(struct net_device * dev)83 static void rose_set_lockdep_key(struct net_device *dev)
84 {
85 lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
86 netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
87 }
88
89 /*
90 * Convert a ROSE address into text.
91 */
rose2asc(char * buf,const rose_address * addr)92 char *rose2asc(char *buf, const rose_address *addr)
93 {
94 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
95 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
96 addr->rose_addr[4] == 0x00) {
97 strcpy(buf, "*");
98 } else {
99 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
100 addr->rose_addr[1] & 0xFF,
101 addr->rose_addr[2] & 0xFF,
102 addr->rose_addr[3] & 0xFF,
103 addr->rose_addr[4] & 0xFF);
104 }
105
106 return buf;
107 }
108
109 /*
110 * Compare two ROSE addresses, 0 == equal.
111 */
rosecmp(rose_address * addr1,rose_address * addr2)112 int rosecmp(rose_address *addr1, rose_address *addr2)
113 {
114 int i;
115
116 for (i = 0; i < 5; i++)
117 if (addr1->rose_addr[i] != addr2->rose_addr[i])
118 return 1;
119
120 return 0;
121 }
122
123 /*
124 * Compare two ROSE addresses for only mask digits, 0 == equal.
125 */
rosecmpm(rose_address * addr1,rose_address * addr2,unsigned short mask)126 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
127 {
128 unsigned int i, j;
129
130 if (mask > 10)
131 return 1;
132
133 for (i = 0; i < mask; i++) {
134 j = i / 2;
135
136 if ((i % 2) != 0) {
137 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
138 return 1;
139 } else {
140 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
141 return 1;
142 }
143 }
144
145 return 0;
146 }
147
148 /*
149 * Socket removal during an interrupt is now safe.
150 */
rose_remove_socket(struct sock * sk)151 static void rose_remove_socket(struct sock *sk)
152 {
153 spin_lock_bh(&rose_list_lock);
154 sk_del_node_init(sk);
155 spin_unlock_bh(&rose_list_lock);
156 }
157
158 /*
159 * Kill all bound sockets on a broken link layer connection to a
160 * particular neighbour.
161 */
rose_kill_by_neigh(struct rose_neigh * neigh)162 void rose_kill_by_neigh(struct rose_neigh *neigh)
163 {
164 struct sock *s;
165
166 spin_lock_bh(&rose_list_lock);
167 sk_for_each(s, &rose_list) {
168 struct rose_sock *rose = rose_sk(s);
169
170 if (rose->neighbour == neigh) {
171 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
172 rose->neighbour->use--;
173 rose->neighbour = NULL;
174 }
175 }
176 spin_unlock_bh(&rose_list_lock);
177 }
178
179 /*
180 * Kill all bound sockets on a dropped device.
181 */
rose_kill_by_device(struct net_device * dev)182 static void rose_kill_by_device(struct net_device *dev)
183 {
184 struct sock *s;
185
186 spin_lock_bh(&rose_list_lock);
187 sk_for_each(s, &rose_list) {
188 struct rose_sock *rose = rose_sk(s);
189
190 if (rose->device == dev) {
191 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
192 if (rose->neighbour)
193 rose->neighbour->use--;
194 dev_put(rose->device);
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 lock_sock(sk);
491 if (sock->state != SS_UNCONNECTED) {
492 release_sock(sk);
493 return -EINVAL;
494 }
495
496 if (sk->sk_state != TCP_LISTEN) {
497 struct rose_sock *rose = rose_sk(sk);
498
499 rose->dest_ndigis = 0;
500 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
501 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
502 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
503 sk->sk_max_ack_backlog = backlog;
504 sk->sk_state = TCP_LISTEN;
505 release_sock(sk);
506 return 0;
507 }
508 release_sock(sk);
509
510 return -EOPNOTSUPP;
511 }
512
513 static struct proto rose_proto = {
514 .name = "ROSE",
515 .owner = THIS_MODULE,
516 .obj_size = sizeof(struct rose_sock),
517 };
518
rose_create(struct net * net,struct socket * sock,int protocol,int kern)519 static int rose_create(struct net *net, struct socket *sock, int protocol,
520 int kern)
521 {
522 struct sock *sk;
523 struct rose_sock *rose;
524
525 if (!net_eq(net, &init_net))
526 return -EAFNOSUPPORT;
527
528 if (sock->type != SOCK_SEQPACKET || protocol != 0)
529 return -ESOCKTNOSUPPORT;
530
531 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
532 if (sk == NULL)
533 return -ENOMEM;
534
535 rose = rose_sk(sk);
536
537 sock_init_data(sock, sk);
538
539 skb_queue_head_init(&rose->ack_queue);
540 #ifdef M_BIT
541 skb_queue_head_init(&rose->frag_queue);
542 rose->fraglen = 0;
543 #endif
544
545 sock->ops = &rose_proto_ops;
546 sk->sk_protocol = protocol;
547
548 timer_setup(&rose->timer, NULL, 0);
549 timer_setup(&rose->idletimer, NULL, 0);
550
551 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
552 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
553 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
554 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
555 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
556
557 rose->state = ROSE_STATE_0;
558
559 return 0;
560 }
561
rose_make_new(struct sock * osk)562 static struct sock *rose_make_new(struct sock *osk)
563 {
564 struct sock *sk;
565 struct rose_sock *rose, *orose;
566
567 if (osk->sk_type != SOCK_SEQPACKET)
568 return NULL;
569
570 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
571 if (sk == NULL)
572 return NULL;
573
574 rose = rose_sk(sk);
575
576 sock_init_data(NULL, sk);
577
578 skb_queue_head_init(&rose->ack_queue);
579 #ifdef M_BIT
580 skb_queue_head_init(&rose->frag_queue);
581 rose->fraglen = 0;
582 #endif
583
584 sk->sk_type = osk->sk_type;
585 sk->sk_priority = osk->sk_priority;
586 sk->sk_protocol = osk->sk_protocol;
587 sk->sk_rcvbuf = osk->sk_rcvbuf;
588 sk->sk_sndbuf = osk->sk_sndbuf;
589 sk->sk_state = TCP_ESTABLISHED;
590 sock_copy_flags(sk, osk);
591
592 timer_setup(&rose->timer, NULL, 0);
593 timer_setup(&rose->idletimer, NULL, 0);
594
595 orose = rose_sk(osk);
596 rose->t1 = orose->t1;
597 rose->t2 = orose->t2;
598 rose->t3 = orose->t3;
599 rose->hb = orose->hb;
600 rose->idle = orose->idle;
601 rose->defer = orose->defer;
602 rose->device = orose->device;
603 if (rose->device)
604 dev_hold(rose->device);
605 rose->qbitincl = orose->qbitincl;
606
607 return sk;
608 }
609
rose_release(struct socket * sock)610 static int rose_release(struct socket *sock)
611 {
612 struct sock *sk = sock->sk;
613 struct rose_sock *rose;
614
615 if (sk == NULL) return 0;
616
617 sock_hold(sk);
618 sock_orphan(sk);
619 lock_sock(sk);
620 rose = rose_sk(sk);
621
622 switch (rose->state) {
623 case ROSE_STATE_0:
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_2:
631 rose->neighbour->use--;
632 release_sock(sk);
633 rose_disconnect(sk, 0, -1, -1);
634 lock_sock(sk);
635 rose_destroy_socket(sk);
636 break;
637
638 case ROSE_STATE_1:
639 case ROSE_STATE_3:
640 case ROSE_STATE_4:
641 case ROSE_STATE_5:
642 rose_clear_queues(sk);
643 rose_stop_idletimer(sk);
644 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
645 rose_start_t3timer(sk);
646 rose->state = ROSE_STATE_2;
647 sk->sk_state = TCP_CLOSE;
648 sk->sk_shutdown |= SEND_SHUTDOWN;
649 sk->sk_state_change(sk);
650 sock_set_flag(sk, SOCK_DEAD);
651 sock_set_flag(sk, SOCK_DESTROY);
652 break;
653
654 default:
655 break;
656 }
657
658 dev_put(rose->device);
659 sock->sk = NULL;
660 release_sock(sk);
661 sock_put(sk);
662
663 return 0;
664 }
665
rose_bind(struct socket * sock,struct sockaddr * uaddr,int addr_len)666 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
667 {
668 struct sock *sk = sock->sk;
669 struct rose_sock *rose = rose_sk(sk);
670 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
671 struct net_device *dev;
672 ax25_address *source;
673 ax25_uid_assoc *user;
674 int n;
675
676 if (!sock_flag(sk, SOCK_ZAPPED))
677 return -EINVAL;
678
679 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
680 return -EINVAL;
681
682 if (addr->srose_family != AF_ROSE)
683 return -EINVAL;
684
685 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
686 return -EINVAL;
687
688 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
689 return -EINVAL;
690
691 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
692 return -EADDRNOTAVAIL;
693
694 source = &addr->srose_call;
695
696 user = ax25_findbyuid(current_euid());
697 if (user) {
698 rose->source_call = user->call;
699 ax25_uid_put(user);
700 } else {
701 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
702 dev_put(dev);
703 return -EACCES;
704 }
705 rose->source_call = *source;
706 }
707
708 rose->source_addr = addr->srose_addr;
709 rose->device = dev;
710 rose->source_ndigis = addr->srose_ndigis;
711
712 if (addr_len == sizeof(struct full_sockaddr_rose)) {
713 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
714 for (n = 0 ; n < addr->srose_ndigis ; n++)
715 rose->source_digis[n] = full_addr->srose_digis[n];
716 } else {
717 if (rose->source_ndigis == 1) {
718 rose->source_digis[0] = addr->srose_digi;
719 }
720 }
721
722 rose_insert_socket(sk);
723
724 sock_reset_flag(sk, SOCK_ZAPPED);
725
726 return 0;
727 }
728
rose_connect(struct socket * sock,struct sockaddr * uaddr,int addr_len,int flags)729 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
730 {
731 struct sock *sk = sock->sk;
732 struct rose_sock *rose = rose_sk(sk);
733 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
734 unsigned char cause, diagnostic;
735 ax25_uid_assoc *user;
736 int n, err = 0;
737
738 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
739 return -EINVAL;
740
741 if (addr->srose_family != AF_ROSE)
742 return -EINVAL;
743
744 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
745 return -EINVAL;
746
747 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
748 return -EINVAL;
749
750 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
751 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
752 return -EINVAL;
753
754 lock_sock(sk);
755
756 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
757 /* Connect completed during a ERESTARTSYS event */
758 sock->state = SS_CONNECTED;
759 goto out_release;
760 }
761
762 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
763 sock->state = SS_UNCONNECTED;
764 err = -ECONNREFUSED;
765 goto out_release;
766 }
767
768 if (sk->sk_state == TCP_ESTABLISHED) {
769 /* No reconnect on a seqpacket socket */
770 err = -EISCONN;
771 goto out_release;
772 }
773
774 sk->sk_state = TCP_CLOSE;
775 sock->state = SS_UNCONNECTED;
776
777 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
778 &diagnostic, 0);
779 if (!rose->neighbour) {
780 err = -ENETUNREACH;
781 goto out_release;
782 }
783
784 rose->lci = rose_new_lci(rose->neighbour);
785 if (!rose->lci) {
786 err = -ENETUNREACH;
787 goto out_release;
788 }
789
790 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
791 struct net_device *dev;
792
793 sock_reset_flag(sk, SOCK_ZAPPED);
794
795 dev = rose_dev_first();
796 if (!dev) {
797 err = -ENETUNREACH;
798 goto out_release;
799 }
800
801 user = ax25_findbyuid(current_euid());
802 if (!user) {
803 err = -EINVAL;
804 dev_put(dev);
805 goto out_release;
806 }
807
808 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
809 rose->source_call = user->call;
810 rose->device = dev;
811 ax25_uid_put(user);
812
813 rose_insert_socket(sk); /* Finish the bind */
814 }
815 rose->dest_addr = addr->srose_addr;
816 rose->dest_call = addr->srose_call;
817 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
818 rose->dest_ndigis = addr->srose_ndigis;
819
820 if (addr_len == sizeof(struct full_sockaddr_rose)) {
821 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
822 for (n = 0 ; n < addr->srose_ndigis ; n++)
823 rose->dest_digis[n] = full_addr->srose_digis[n];
824 } else {
825 if (rose->dest_ndigis == 1) {
826 rose->dest_digis[0] = addr->srose_digi;
827 }
828 }
829
830 /* Move to connecting socket, start sending Connect Requests */
831 sock->state = SS_CONNECTING;
832 sk->sk_state = TCP_SYN_SENT;
833
834 rose->state = ROSE_STATE_1;
835
836 rose->neighbour->use++;
837
838 rose_write_internal(sk, ROSE_CALL_REQUEST);
839 rose_start_heartbeat(sk);
840 rose_start_t1timer(sk);
841
842 /* Now the loop */
843 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
844 err = -EINPROGRESS;
845 goto out_release;
846 }
847
848 /*
849 * A Connect Ack with Choke or timeout or failed routing will go to
850 * closed.
851 */
852 if (sk->sk_state == TCP_SYN_SENT) {
853 DEFINE_WAIT(wait);
854
855 for (;;) {
856 prepare_to_wait(sk_sleep(sk), &wait,
857 TASK_INTERRUPTIBLE);
858 if (sk->sk_state != TCP_SYN_SENT)
859 break;
860 if (!signal_pending(current)) {
861 release_sock(sk);
862 schedule();
863 lock_sock(sk);
864 continue;
865 }
866 err = -ERESTARTSYS;
867 break;
868 }
869 finish_wait(sk_sleep(sk), &wait);
870
871 if (err)
872 goto out_release;
873 }
874
875 if (sk->sk_state != TCP_ESTABLISHED) {
876 sock->state = SS_UNCONNECTED;
877 err = sock_error(sk); /* Always set at this point */
878 goto out_release;
879 }
880
881 sock->state = SS_CONNECTED;
882
883 out_release:
884 release_sock(sk);
885
886 return err;
887 }
888
rose_accept(struct socket * sock,struct socket * newsock,int flags,bool kern)889 static int rose_accept(struct socket *sock, struct socket *newsock, int flags,
890 bool kern)
891 {
892 struct sk_buff *skb;
893 struct sock *newsk;
894 DEFINE_WAIT(wait);
895 struct sock *sk;
896 int err = 0;
897
898 if ((sk = sock->sk) == NULL)
899 return -EINVAL;
900
901 lock_sock(sk);
902 if (sk->sk_type != SOCK_SEQPACKET) {
903 err = -EOPNOTSUPP;
904 goto out_release;
905 }
906
907 if (sk->sk_state != TCP_LISTEN) {
908 err = -EINVAL;
909 goto out_release;
910 }
911
912 /*
913 * The write queue this time is holding sockets ready to use
914 * hooked into the SABM we saved
915 */
916 for (;;) {
917 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
918
919 skb = skb_dequeue(&sk->sk_receive_queue);
920 if (skb)
921 break;
922
923 if (flags & O_NONBLOCK) {
924 err = -EWOULDBLOCK;
925 break;
926 }
927 if (!signal_pending(current)) {
928 release_sock(sk);
929 schedule();
930 lock_sock(sk);
931 continue;
932 }
933 err = -ERESTARTSYS;
934 break;
935 }
936 finish_wait(sk_sleep(sk), &wait);
937 if (err)
938 goto out_release;
939
940 newsk = skb->sk;
941 sock_graft(newsk, newsock);
942
943 /* Now attach up the new socket */
944 skb->sk = NULL;
945 kfree_skb(skb);
946 sk_acceptq_removed(sk);
947
948 out_release:
949 release_sock(sk);
950
951 return err;
952 }
953
rose_getname(struct socket * sock,struct sockaddr * uaddr,int peer)954 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
955 int peer)
956 {
957 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
958 struct sock *sk = sock->sk;
959 struct rose_sock *rose = rose_sk(sk);
960 int n;
961
962 memset(srose, 0, sizeof(*srose));
963 if (peer != 0) {
964 if (sk->sk_state != TCP_ESTABLISHED)
965 return -ENOTCONN;
966 srose->srose_family = AF_ROSE;
967 srose->srose_addr = rose->dest_addr;
968 srose->srose_call = rose->dest_call;
969 srose->srose_ndigis = rose->dest_ndigis;
970 for (n = 0; n < rose->dest_ndigis; n++)
971 srose->srose_digis[n] = rose->dest_digis[n];
972 } else {
973 srose->srose_family = AF_ROSE;
974 srose->srose_addr = rose->source_addr;
975 srose->srose_call = rose->source_call;
976 srose->srose_ndigis = rose->source_ndigis;
977 for (n = 0; n < rose->source_ndigis; n++)
978 srose->srose_digis[n] = rose->source_digis[n];
979 }
980
981 return sizeof(struct full_sockaddr_rose);
982 }
983
rose_rx_call_request(struct sk_buff * skb,struct net_device * dev,struct rose_neigh * neigh,unsigned int lci)984 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
985 {
986 struct sock *sk;
987 struct sock *make;
988 struct rose_sock *make_rose;
989 struct rose_facilities_struct facilities;
990 int n;
991
992 skb->sk = NULL; /* Initially we don't know who it's for */
993
994 /*
995 * skb->data points to the rose frame start
996 */
997 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
998
999 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
1000 skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
1001 &facilities)) {
1002 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
1003 return 0;
1004 }
1005
1006 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1007
1008 /*
1009 * We can't accept the Call Request.
1010 */
1011 if (sk == NULL || sk_acceptq_is_full(sk) ||
1012 (make = rose_make_new(sk)) == NULL) {
1013 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1014 return 0;
1015 }
1016
1017 skb->sk = make;
1018 make->sk_state = TCP_ESTABLISHED;
1019 make_rose = rose_sk(make);
1020
1021 make_rose->lci = lci;
1022 make_rose->dest_addr = facilities.dest_addr;
1023 make_rose->dest_call = facilities.dest_call;
1024 make_rose->dest_ndigis = facilities.dest_ndigis;
1025 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1026 make_rose->dest_digis[n] = facilities.dest_digis[n];
1027 make_rose->source_addr = facilities.source_addr;
1028 make_rose->source_call = facilities.source_call;
1029 make_rose->source_ndigis = facilities.source_ndigis;
1030 for (n = 0 ; n < facilities.source_ndigis ; n++)
1031 make_rose->source_digis[n] = facilities.source_digis[n];
1032 make_rose->neighbour = neigh;
1033 make_rose->device = dev;
1034 make_rose->facilities = facilities;
1035
1036 make_rose->neighbour->use++;
1037
1038 if (rose_sk(sk)->defer) {
1039 make_rose->state = ROSE_STATE_5;
1040 } else {
1041 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1042 make_rose->state = ROSE_STATE_3;
1043 rose_start_idletimer(make);
1044 }
1045
1046 make_rose->condition = 0x00;
1047 make_rose->vs = 0;
1048 make_rose->va = 0;
1049 make_rose->vr = 0;
1050 make_rose->vl = 0;
1051 sk_acceptq_added(sk);
1052
1053 rose_insert_socket(make);
1054
1055 skb_queue_head(&sk->sk_receive_queue, skb);
1056
1057 rose_start_heartbeat(make);
1058
1059 if (!sock_flag(sk, SOCK_DEAD))
1060 sk->sk_data_ready(sk);
1061
1062 return 1;
1063 }
1064
rose_sendmsg(struct socket * sock,struct msghdr * msg,size_t len)1065 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1066 {
1067 struct sock *sk = sock->sk;
1068 struct rose_sock *rose = rose_sk(sk);
1069 DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1070 int err;
1071 struct full_sockaddr_rose srose;
1072 struct sk_buff *skb;
1073 unsigned char *asmptr;
1074 int n, size, qbit = 0;
1075
1076 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1077 return -EINVAL;
1078
1079 if (sock_flag(sk, SOCK_ZAPPED))
1080 return -EADDRNOTAVAIL;
1081
1082 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1083 send_sig(SIGPIPE, current, 0);
1084 return -EPIPE;
1085 }
1086
1087 if (rose->neighbour == NULL || rose->device == NULL)
1088 return -ENETUNREACH;
1089
1090 if (usrose != NULL) {
1091 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1092 return -EINVAL;
1093 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1094 memcpy(&srose, usrose, msg->msg_namelen);
1095 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1096 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1097 return -EISCONN;
1098 if (srose.srose_ndigis != rose->dest_ndigis)
1099 return -EISCONN;
1100 if (srose.srose_ndigis == rose->dest_ndigis) {
1101 for (n = 0 ; n < srose.srose_ndigis ; n++)
1102 if (ax25cmp(&rose->dest_digis[n],
1103 &srose.srose_digis[n]))
1104 return -EISCONN;
1105 }
1106 if (srose.srose_family != AF_ROSE)
1107 return -EINVAL;
1108 } else {
1109 if (sk->sk_state != TCP_ESTABLISHED)
1110 return -ENOTCONN;
1111
1112 srose.srose_family = AF_ROSE;
1113 srose.srose_addr = rose->dest_addr;
1114 srose.srose_call = rose->dest_call;
1115 srose.srose_ndigis = rose->dest_ndigis;
1116 for (n = 0 ; n < rose->dest_ndigis ; n++)
1117 srose.srose_digis[n] = rose->dest_digis[n];
1118 }
1119
1120 /* Build a packet */
1121 /* Sanity check the packet size */
1122 if (len > 65535)
1123 return -EMSGSIZE;
1124
1125 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1126
1127 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1128 return err;
1129
1130 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1131
1132 /*
1133 * Put the data on the end
1134 */
1135
1136 skb_reset_transport_header(skb);
1137 skb_put(skb, len);
1138
1139 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1140 if (err) {
1141 kfree_skb(skb);
1142 return err;
1143 }
1144
1145 /*
1146 * If the Q BIT Include socket option is in force, the first
1147 * byte of the user data is the logical value of the Q Bit.
1148 */
1149 if (rose->qbitincl) {
1150 qbit = skb->data[0];
1151 skb_pull(skb, 1);
1152 }
1153
1154 /*
1155 * Push down the ROSE header
1156 */
1157 asmptr = skb_push(skb, ROSE_MIN_LEN);
1158
1159 /* Build a ROSE Network header */
1160 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1161 asmptr[1] = (rose->lci >> 0) & 0xFF;
1162 asmptr[2] = ROSE_DATA;
1163
1164 if (qbit)
1165 asmptr[0] |= ROSE_Q_BIT;
1166
1167 if (sk->sk_state != TCP_ESTABLISHED) {
1168 kfree_skb(skb);
1169 return -ENOTCONN;
1170 }
1171
1172 #ifdef M_BIT
1173 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1174 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1175 unsigned char header[ROSE_MIN_LEN];
1176 struct sk_buff *skbn;
1177 int frontlen;
1178 int lg;
1179
1180 /* Save a copy of the Header */
1181 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1182 skb_pull(skb, ROSE_MIN_LEN);
1183
1184 frontlen = skb_headroom(skb);
1185
1186 while (skb->len > 0) {
1187 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1188 kfree_skb(skb);
1189 return err;
1190 }
1191
1192 skbn->sk = sk;
1193 skbn->free = 1;
1194 skbn->arp = 1;
1195
1196 skb_reserve(skbn, frontlen);
1197
1198 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1199
1200 /* Copy the user data */
1201 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1202 skb_pull(skb, lg);
1203
1204 /* Duplicate the Header */
1205 skb_push(skbn, ROSE_MIN_LEN);
1206 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1207
1208 if (skb->len > 0)
1209 skbn->data[2] |= M_BIT;
1210
1211 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1212 }
1213
1214 skb->free = 1;
1215 kfree_skb(skb);
1216 } else {
1217 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1218 }
1219 #else
1220 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1221 #endif
1222
1223 rose_kick(sk);
1224
1225 return len;
1226 }
1227
1228
rose_recvmsg(struct socket * sock,struct msghdr * msg,size_t size,int flags)1229 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1230 int flags)
1231 {
1232 struct sock *sk = sock->sk;
1233 struct rose_sock *rose = rose_sk(sk);
1234 size_t copied;
1235 unsigned char *asmptr;
1236 struct sk_buff *skb;
1237 int n, er, qbit;
1238
1239 /*
1240 * This works for seqpacket too. The receiver has ordered the queue for
1241 * us! We do one quick check first though
1242 */
1243 if (sk->sk_state != TCP_ESTABLISHED)
1244 return -ENOTCONN;
1245
1246 /* Now we can treat all alike */
1247 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
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
1311 spin_lock_irq(&sk->sk_receive_queue.lock);
1312 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1313 amount = skb->len;
1314 spin_unlock_irq(&sk->sk_receive_queue.lock);
1315 return put_user(amount, (unsigned int __user *) argp);
1316 }
1317
1318 case SIOCGIFADDR:
1319 case SIOCSIFADDR:
1320 case SIOCGIFDSTADDR:
1321 case SIOCSIFDSTADDR:
1322 case SIOCGIFBRDADDR:
1323 case SIOCSIFBRDADDR:
1324 case SIOCGIFNETMASK:
1325 case SIOCSIFNETMASK:
1326 case SIOCGIFMETRIC:
1327 case SIOCSIFMETRIC:
1328 return -EINVAL;
1329
1330 case SIOCADDRT:
1331 case SIOCDELRT:
1332 case SIOCRSCLRRT:
1333 if (!capable(CAP_NET_ADMIN))
1334 return -EPERM;
1335 return rose_rt_ioctl(cmd, argp);
1336
1337 case SIOCRSGCAUSE: {
1338 struct rose_cause_struct rose_cause;
1339 rose_cause.cause = rose->cause;
1340 rose_cause.diagnostic = rose->diagnostic;
1341 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1342 }
1343
1344 case SIOCRSSCAUSE: {
1345 struct rose_cause_struct rose_cause;
1346 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1347 return -EFAULT;
1348 rose->cause = rose_cause.cause;
1349 rose->diagnostic = rose_cause.diagnostic;
1350 return 0;
1351 }
1352
1353 case SIOCRSSL2CALL:
1354 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1355 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1356 ax25_listen_release(&rose_callsign, NULL);
1357 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1358 return -EFAULT;
1359 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1360 return ax25_listen_register(&rose_callsign, NULL);
1361
1362 return 0;
1363
1364 case SIOCRSGL2CALL:
1365 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1366
1367 case SIOCRSACCEPT:
1368 if (rose->state == ROSE_STATE_5) {
1369 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1370 rose_start_idletimer(sk);
1371 rose->condition = 0x00;
1372 rose->vs = 0;
1373 rose->va = 0;
1374 rose->vr = 0;
1375 rose->vl = 0;
1376 rose->state = ROSE_STATE_3;
1377 }
1378 return 0;
1379
1380 default:
1381 return -ENOIOCTLCMD;
1382 }
1383
1384 return 0;
1385 }
1386
1387 #ifdef CONFIG_PROC_FS
rose_info_start(struct seq_file * seq,loff_t * pos)1388 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1389 __acquires(rose_list_lock)
1390 {
1391 spin_lock_bh(&rose_list_lock);
1392 return seq_hlist_start_head(&rose_list, *pos);
1393 }
1394
rose_info_next(struct seq_file * seq,void * v,loff_t * pos)1395 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1396 {
1397 return seq_hlist_next(v, &rose_list, pos);
1398 }
1399
rose_info_stop(struct seq_file * seq,void * v)1400 static void rose_info_stop(struct seq_file *seq, void *v)
1401 __releases(rose_list_lock)
1402 {
1403 spin_unlock_bh(&rose_list_lock);
1404 }
1405
rose_info_show(struct seq_file * seq,void * v)1406 static int rose_info_show(struct seq_file *seq, void *v)
1407 {
1408 char buf[11], rsbuf[11];
1409
1410 if (v == SEQ_START_TOKEN)
1411 seq_puts(seq,
1412 "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");
1413
1414 else {
1415 struct sock *s = sk_entry(v);
1416 struct rose_sock *rose = rose_sk(s);
1417 const char *devname, *callsign;
1418 const struct net_device *dev = rose->device;
1419
1420 if (!dev)
1421 devname = "???";
1422 else
1423 devname = dev->name;
1424
1425 seq_printf(seq, "%-10s %-9s ",
1426 rose2asc(rsbuf, &rose->dest_addr),
1427 ax2asc(buf, &rose->dest_call));
1428
1429 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1430 callsign = "??????-?";
1431 else
1432 callsign = ax2asc(buf, &rose->source_call);
1433
1434 seq_printf(seq,
1435 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1436 rose2asc(rsbuf, &rose->source_addr),
1437 callsign,
1438 devname,
1439 rose->lci & 0x0FFF,
1440 (rose->neighbour) ? rose->neighbour->number : 0,
1441 rose->state,
1442 rose->vs,
1443 rose->vr,
1444 rose->va,
1445 ax25_display_timer(&rose->timer) / HZ,
1446 rose->t1 / HZ,
1447 rose->t2 / HZ,
1448 rose->t3 / HZ,
1449 rose->hb / HZ,
1450 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1451 rose->idle / (60 * HZ),
1452 sk_wmem_alloc_get(s),
1453 sk_rmem_alloc_get(s),
1454 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1455 }
1456
1457 return 0;
1458 }
1459
1460 static const struct seq_operations rose_info_seqops = {
1461 .start = rose_info_start,
1462 .next = rose_info_next,
1463 .stop = rose_info_stop,
1464 .show = rose_info_show,
1465 };
1466 #endif /* CONFIG_PROC_FS */
1467
1468 static const struct net_proto_family rose_family_ops = {
1469 .family = PF_ROSE,
1470 .create = rose_create,
1471 .owner = THIS_MODULE,
1472 };
1473
1474 static const struct proto_ops rose_proto_ops = {
1475 .family = PF_ROSE,
1476 .owner = THIS_MODULE,
1477 .release = rose_release,
1478 .bind = rose_bind,
1479 .connect = rose_connect,
1480 .socketpair = sock_no_socketpair,
1481 .accept = rose_accept,
1482 .getname = rose_getname,
1483 .poll = datagram_poll,
1484 .ioctl = rose_ioctl,
1485 .gettstamp = sock_gettstamp,
1486 .listen = rose_listen,
1487 .shutdown = sock_no_shutdown,
1488 .setsockopt = rose_setsockopt,
1489 .getsockopt = rose_getsockopt,
1490 .sendmsg = rose_sendmsg,
1491 .recvmsg = rose_recvmsg,
1492 .mmap = sock_no_mmap,
1493 .sendpage = sock_no_sendpage,
1494 };
1495
1496 static struct notifier_block rose_dev_notifier = {
1497 .notifier_call = rose_device_event,
1498 };
1499
1500 static struct net_device **dev_rose;
1501
1502 static struct ax25_protocol rose_pid = {
1503 .pid = AX25_P_ROSE,
1504 .func = rose_route_frame
1505 };
1506
1507 static struct ax25_linkfail rose_linkfail_notifier = {
1508 .func = rose_link_failed
1509 };
1510
rose_proto_init(void)1511 static int __init rose_proto_init(void)
1512 {
1513 int i;
1514 int rc;
1515
1516 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1517 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter too large\n");
1518 rc = -EINVAL;
1519 goto out;
1520 }
1521
1522 rc = proto_register(&rose_proto, 0);
1523 if (rc != 0)
1524 goto out;
1525
1526 rose_callsign = null_ax25_address;
1527
1528 dev_rose = kcalloc(rose_ndevs, sizeof(struct net_device *),
1529 GFP_KERNEL);
1530 if (dev_rose == NULL) {
1531 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1532 rc = -ENOMEM;
1533 goto out_proto_unregister;
1534 }
1535
1536 for (i = 0; i < rose_ndevs; i++) {
1537 struct net_device *dev;
1538 char name[IFNAMSIZ];
1539
1540 sprintf(name, "rose%d", i);
1541 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1542 if (!dev) {
1543 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1544 rc = -ENOMEM;
1545 goto fail;
1546 }
1547 rc = register_netdev(dev);
1548 if (rc) {
1549 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1550 free_netdev(dev);
1551 goto fail;
1552 }
1553 rose_set_lockdep_key(dev);
1554 dev_rose[i] = dev;
1555 }
1556
1557 sock_register(&rose_family_ops);
1558 register_netdevice_notifier(&rose_dev_notifier);
1559
1560 ax25_register_pid(&rose_pid);
1561 ax25_linkfail_register(&rose_linkfail_notifier);
1562
1563 #ifdef CONFIG_SYSCTL
1564 rose_register_sysctl();
1565 #endif
1566 rose_loopback_init();
1567
1568 rose_add_loopback_neigh();
1569
1570 proc_create_seq("rose", 0444, init_net.proc_net, &rose_info_seqops);
1571 proc_create_seq("rose_neigh", 0444, init_net.proc_net,
1572 &rose_neigh_seqops);
1573 proc_create_seq("rose_nodes", 0444, init_net.proc_net,
1574 &rose_node_seqops);
1575 proc_create_seq("rose_routes", 0444, init_net.proc_net,
1576 &rose_route_seqops);
1577 out:
1578 return rc;
1579 fail:
1580 while (--i >= 0) {
1581 unregister_netdev(dev_rose[i]);
1582 free_netdev(dev_rose[i]);
1583 }
1584 kfree(dev_rose);
1585 out_proto_unregister:
1586 proto_unregister(&rose_proto);
1587 goto out;
1588 }
1589 module_init(rose_proto_init);
1590
1591 module_param(rose_ndevs, int, 0);
1592 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1593
1594 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1595 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1596 MODULE_LICENSE("GPL");
1597 MODULE_ALIAS_NETPROTO(PF_ROSE);
1598
rose_exit(void)1599 static void __exit rose_exit(void)
1600 {
1601 int i;
1602
1603 remove_proc_entry("rose", init_net.proc_net);
1604 remove_proc_entry("rose_neigh", init_net.proc_net);
1605 remove_proc_entry("rose_nodes", init_net.proc_net);
1606 remove_proc_entry("rose_routes", init_net.proc_net);
1607 rose_loopback_clear();
1608
1609 rose_rt_free();
1610
1611 ax25_protocol_release(AX25_P_ROSE);
1612 ax25_linkfail_release(&rose_linkfail_notifier);
1613
1614 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1615 ax25_listen_release(&rose_callsign, NULL);
1616
1617 #ifdef CONFIG_SYSCTL
1618 rose_unregister_sysctl();
1619 #endif
1620 unregister_netdevice_notifier(&rose_dev_notifier);
1621
1622 sock_unregister(PF_ROSE);
1623
1624 for (i = 0; i < rose_ndevs; i++) {
1625 struct net_device *dev = dev_rose[i];
1626
1627 if (dev) {
1628 unregister_netdev(dev);
1629 free_netdev(dev);
1630 }
1631 }
1632
1633 kfree(dev_rose);
1634 proto_unregister(&rose_proto);
1635 }
1636
1637 module_exit(rose_exit);
1638