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16#include <linux/capability.h>
17#include <linux/module.h>
18#include <linux/errno.h>
19#include <linux/types.h>
20#include <linux/socket.h>
21#include <linux/in.h>
22#include <linux/kernel.h>
23#include <linux/sched.h>
24#include <linux/timer.h>
25#include <linux/string.h>
26#include <linux/sockios.h>
27#include <linux/net.h>
28#include <linux/slab.h>
29#include <net/ax25.h>
30#include <linux/inet.h>
31#include <linux/netdevice.h>
32#include <linux/if_arp.h>
33#include <linux/skbuff.h>
34#include <net/sock.h>
35#include <asm/uaccess.h>
36#include <linux/fcntl.h>
37#include <linux/termios.h>
38#include <linux/mm.h>
39#include <linux/interrupt.h>
40#include <linux/notifier.h>
41#include <linux/proc_fs.h>
42#include <linux/stat.h>
43#include <linux/netfilter.h>
44#include <linux/sysctl.h>
45#include <linux/init.h>
46#include <linux/spinlock.h>
47#include <net/net_namespace.h>
48#include <net/tcp_states.h>
49#include <net/ip.h>
50#include <net/arp.h>
51
52
53
54HLIST_HEAD(ax25_list);
55DEFINE_SPINLOCK(ax25_list_lock);
56
57static const struct proto_ops ax25_proto_ops;
58
59static void ax25_free_sock(struct sock *sk)
60{
61 ax25_cb_put(ax25_sk(sk));
62}
63
64
65
66
67static void ax25_cb_del(ax25_cb *ax25)
68{
69 if (!hlist_unhashed(&ax25->ax25_node)) {
70 spin_lock_bh(&ax25_list_lock);
71 hlist_del_init(&ax25->ax25_node);
72 spin_unlock_bh(&ax25_list_lock);
73 ax25_cb_put(ax25);
74 }
75}
76
77
78
79
80static void ax25_kill_by_device(struct net_device *dev)
81{
82 ax25_dev *ax25_dev;
83 ax25_cb *s;
84 struct hlist_node *node;
85
86 if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
87 return;
88
89 spin_lock_bh(&ax25_list_lock);
90again:
91 ax25_for_each(s, node, &ax25_list) {
92 if (s->ax25_dev == ax25_dev) {
93 s->ax25_dev = NULL;
94 spin_unlock_bh(&ax25_list_lock);
95 ax25_disconnect(s, ENETUNREACH);
96 spin_lock_bh(&ax25_list_lock);
97
98
99
100
101
102
103
104
105 goto again;
106 }
107 }
108 spin_unlock_bh(&ax25_list_lock);
109}
110
111
112
113
114static int ax25_device_event(struct notifier_block *this, unsigned long event,
115 void *ptr)
116{
117 struct net_device *dev = (struct net_device *)ptr;
118
119 if (!net_eq(dev_net(dev), &init_net))
120 return NOTIFY_DONE;
121
122
123 if (dev->type != ARPHRD_AX25)
124 return NOTIFY_DONE;
125
126 switch (event) {
127 case NETDEV_UP:
128 ax25_dev_device_up(dev);
129 break;
130 case NETDEV_DOWN:
131 ax25_kill_by_device(dev);
132 ax25_rt_device_down(dev);
133 ax25_dev_device_down(dev);
134 break;
135 default:
136 break;
137 }
138
139 return NOTIFY_DONE;
140}
141
142
143
144
145void ax25_cb_add(ax25_cb *ax25)
146{
147 spin_lock_bh(&ax25_list_lock);
148 ax25_cb_hold(ax25);
149 hlist_add_head(&ax25->ax25_node, &ax25_list);
150 spin_unlock_bh(&ax25_list_lock);
151}
152
153
154
155
156
157struct sock *ax25_find_listener(ax25_address *addr, int digi,
158 struct net_device *dev, int type)
159{
160 ax25_cb *s;
161 struct hlist_node *node;
162
163 spin_lock(&ax25_list_lock);
164 ax25_for_each(s, node, &ax25_list) {
165 if ((s->iamdigi && !digi) || (!s->iamdigi && digi))
166 continue;
167 if (s->sk && !ax25cmp(&s->source_addr, addr) &&
168 s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) {
169
170 if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) {
171 sock_hold(s->sk);
172 spin_unlock(&ax25_list_lock);
173 return s->sk;
174 }
175 }
176 }
177 spin_unlock(&ax25_list_lock);
178
179 return NULL;
180}
181
182
183
184
185struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr,
186 int type)
187{
188 struct sock *sk = NULL;
189 ax25_cb *s;
190 struct hlist_node *node;
191
192 spin_lock(&ax25_list_lock);
193 ax25_for_each(s, node, &ax25_list) {
194 if (s->sk && !ax25cmp(&s->source_addr, my_addr) &&
195 !ax25cmp(&s->dest_addr, dest_addr) &&
196 s->sk->sk_type == type) {
197 sk = s->sk;
198 sock_hold(sk);
199 break;
200 }
201 }
202
203 spin_unlock(&ax25_list_lock);
204
205 return sk;
206}
207
208
209
210
211
212ax25_cb *ax25_find_cb(ax25_address *src_addr, ax25_address *dest_addr,
213 ax25_digi *digi, struct net_device *dev)
214{
215 ax25_cb *s;
216 struct hlist_node *node;
217
218 spin_lock_bh(&ax25_list_lock);
219 ax25_for_each(s, node, &ax25_list) {
220 if (s->sk && s->sk->sk_type != SOCK_SEQPACKET)
221 continue;
222 if (s->ax25_dev == NULL)
223 continue;
224 if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) {
225 if (digi != NULL && digi->ndigi != 0) {
226 if (s->digipeat == NULL)
227 continue;
228 if (ax25digicmp(s->digipeat, digi) != 0)
229 continue;
230 } else {
231 if (s->digipeat != NULL && s->digipeat->ndigi != 0)
232 continue;
233 }
234 ax25_cb_hold(s);
235 spin_unlock_bh(&ax25_list_lock);
236
237 return s;
238 }
239 }
240 spin_unlock_bh(&ax25_list_lock);
241
242 return NULL;
243}
244
245EXPORT_SYMBOL(ax25_find_cb);
246
247void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto)
248{
249 ax25_cb *s;
250 struct sk_buff *copy;
251 struct hlist_node *node;
252
253 spin_lock(&ax25_list_lock);
254 ax25_for_each(s, node, &ax25_list) {
255 if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 &&
256 s->sk->sk_type == SOCK_RAW &&
257 s->sk->sk_protocol == proto &&
258 s->ax25_dev->dev == skb->dev &&
259 atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) {
260 if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL)
261 continue;
262 if (sock_queue_rcv_skb(s->sk, copy) != 0)
263 kfree_skb(copy);
264 }
265 }
266 spin_unlock(&ax25_list_lock);
267}
268
269
270
271
272void ax25_destroy_socket(ax25_cb *);
273
274
275
276
277static void ax25_destroy_timer(unsigned long data)
278{
279 ax25_cb *ax25=(ax25_cb *)data;
280 struct sock *sk;
281
282 sk=ax25->sk;
283
284 bh_lock_sock(sk);
285 sock_hold(sk);
286 ax25_destroy_socket(ax25);
287 bh_unlock_sock(sk);
288 sock_put(sk);
289}
290
291
292
293
294
295
296
297void ax25_destroy_socket(ax25_cb *ax25)
298{
299 struct sk_buff *skb;
300
301 ax25_cb_del(ax25);
302
303 ax25_stop_heartbeat(ax25);
304 ax25_stop_t1timer(ax25);
305 ax25_stop_t2timer(ax25);
306 ax25_stop_t3timer(ax25);
307 ax25_stop_idletimer(ax25);
308
309 ax25_clear_queues(ax25);
310
311 if (ax25->sk != NULL) {
312 while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) {
313 if (skb->sk != ax25->sk) {
314
315 ax25_cb *sax25 = ax25_sk(skb->sk);
316
317
318 sock_orphan(skb->sk);
319
320
321 skb->sk->sk_state = TCP_LISTEN;
322
323 ax25_start_heartbeat(sax25);
324 sax25->state = AX25_STATE_0;
325 }
326
327 kfree_skb(skb);
328 }
329 skb_queue_purge(&ax25->sk->sk_write_queue);
330 }
331
332 if (ax25->sk != NULL) {
333 if (sk_has_allocations(ax25->sk)) {
334
335 setup_timer(&ax25->dtimer, ax25_destroy_timer,
336 (unsigned long)ax25);
337 ax25->dtimer.expires = jiffies + 2 * HZ;
338 add_timer(&ax25->dtimer);
339 } else {
340 struct sock *sk=ax25->sk;
341 ax25->sk=NULL;
342 sock_put(sk);
343 }
344 } else {
345 ax25_cb_put(ax25);
346 }
347}
348
349
350
351
352
353
354static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
355{
356 struct ax25_ctl_struct ax25_ctl;
357 ax25_digi digi;
358 ax25_dev *ax25_dev;
359 ax25_cb *ax25;
360 unsigned int k;
361 int ret = 0;
362
363 if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
364 return -EFAULT;
365
366 if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL)
367 return -ENODEV;
368
369 if (ax25_ctl.digi_count > AX25_MAX_DIGIS)
370 return -EINVAL;
371
372 if (ax25_ctl.arg > ULONG_MAX / HZ && ax25_ctl.cmd != AX25_KILL)
373 return -EINVAL;
374
375 digi.ndigi = ax25_ctl.digi_count;
376 for (k = 0; k < digi.ndigi; k++)
377 digi.calls[k] = ax25_ctl.digi_addr[k];
378
379 if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL)
380 return -ENOTCONN;
381
382 switch (ax25_ctl.cmd) {
383 case AX25_KILL:
384 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
385#ifdef CONFIG_AX25_DAMA_SLAVE
386 if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
387 ax25_dama_off(ax25);
388#endif
389 ax25_disconnect(ax25, ENETRESET);
390 break;
391
392 case AX25_WINDOW:
393 if (ax25->modulus == AX25_MODULUS) {
394 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
395 goto einval_put;
396 } else {
397 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
398 goto einval_put;
399 }
400 ax25->window = ax25_ctl.arg;
401 break;
402
403 case AX25_T1:
404 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
405 goto einval_put;
406 ax25->rtt = (ax25_ctl.arg * HZ) / 2;
407 ax25->t1 = ax25_ctl.arg * HZ;
408 break;
409
410 case AX25_T2:
411 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
412 goto einval_put;
413 ax25->t2 = ax25_ctl.arg * HZ;
414 break;
415
416 case AX25_N2:
417 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
418 goto einval_put;
419 ax25->n2count = 0;
420 ax25->n2 = ax25_ctl.arg;
421 break;
422
423 case AX25_T3:
424 if (ax25_ctl.arg > ULONG_MAX / HZ)
425 goto einval_put;
426 ax25->t3 = ax25_ctl.arg * HZ;
427 break;
428
429 case AX25_IDLE:
430 if (ax25_ctl.arg > ULONG_MAX / (60 * HZ))
431 goto einval_put;
432
433 ax25->idle = ax25_ctl.arg * 60 * HZ;
434 break;
435
436 case AX25_PACLEN:
437 if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
438 goto einval_put;
439 ax25->paclen = ax25_ctl.arg;
440 break;
441
442 default:
443 goto einval_put;
444 }
445
446out_put:
447 ax25_cb_put(ax25);
448 return ret;
449
450einval_put:
451 ret = -EINVAL;
452 goto out_put;
453}
454
455static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev)
456{
457 ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2;
458 ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]);
459 ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]);
460 ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]);
461 ax25->n2 = ax25_dev->values[AX25_VALUES_N2];
462 ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN];
463 ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]);
464 ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF];
465
466 if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) {
467 ax25->modulus = AX25_EMODULUS;
468 ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
469 } else {
470 ax25->modulus = AX25_MODULUS;
471 ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
472 }
473}
474
475
476
477
478
479void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev)
480{
481 ax25->ax25_dev = ax25_dev;
482
483 if (ax25->ax25_dev != NULL) {
484 ax25_fillin_cb_from_dev(ax25, ax25_dev);
485 return;
486 }
487
488
489
490
491 ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2;
492 ax25->t1 = msecs_to_jiffies(AX25_DEF_T1);
493 ax25->t2 = msecs_to_jiffies(AX25_DEF_T2);
494 ax25->t3 = msecs_to_jiffies(AX25_DEF_T3);
495 ax25->n2 = AX25_DEF_N2;
496 ax25->paclen = AX25_DEF_PACLEN;
497 ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE);
498 ax25->backoff = AX25_DEF_BACKOFF;
499
500 if (AX25_DEF_AXDEFMODE) {
501 ax25->modulus = AX25_EMODULUS;
502 ax25->window = AX25_DEF_EWINDOW;
503 } else {
504 ax25->modulus = AX25_MODULUS;
505 ax25->window = AX25_DEF_WINDOW;
506 }
507}
508
509
510
511
512ax25_cb *ax25_create_cb(void)
513{
514 ax25_cb *ax25;
515
516 if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL)
517 return NULL;
518
519 atomic_set(&ax25->refcount, 1);
520
521 skb_queue_head_init(&ax25->write_queue);
522 skb_queue_head_init(&ax25->frag_queue);
523 skb_queue_head_init(&ax25->ack_queue);
524 skb_queue_head_init(&ax25->reseq_queue);
525
526 ax25_setup_timers(ax25);
527
528 ax25_fillin_cb(ax25, NULL);
529
530 ax25->state = AX25_STATE_0;
531
532 return ax25;
533}
534
535
536
537
538
539
540static int ax25_setsockopt(struct socket *sock, int level, int optname,
541 char __user *optval, unsigned int optlen)
542{
543 struct sock *sk = sock->sk;
544 ax25_cb *ax25;
545 struct net_device *dev;
546 char devname[IFNAMSIZ];
547 unsigned long opt;
548 int res = 0;
549
550 if (level != SOL_AX25)
551 return -ENOPROTOOPT;
552
553 if (optlen < sizeof(unsigned int))
554 return -EINVAL;
555
556 if (get_user(opt, (unsigned int __user *)optval))
557 return -EFAULT;
558
559 lock_sock(sk);
560 ax25 = ax25_sk(sk);
561
562 switch (optname) {
563 case AX25_WINDOW:
564 if (ax25->modulus == AX25_MODULUS) {
565 if (opt < 1 || opt > 7) {
566 res = -EINVAL;
567 break;
568 }
569 } else {
570 if (opt < 1 || opt > 63) {
571 res = -EINVAL;
572 break;
573 }
574 }
575 ax25->window = opt;
576 break;
577
578 case AX25_T1:
579 if (opt < 1 || opt > ULONG_MAX / HZ) {
580 res = -EINVAL;
581 break;
582 }
583 ax25->rtt = (opt * HZ) >> 1;
584 ax25->t1 = opt * HZ;
585 break;
586
587 case AX25_T2:
588 if (opt < 1 || opt > ULONG_MAX / HZ) {
589 res = -EINVAL;
590 break;
591 }
592 ax25->t2 = opt * HZ;
593 break;
594
595 case AX25_N2:
596 if (opt < 1 || opt > 31) {
597 res = -EINVAL;
598 break;
599 }
600 ax25->n2 = opt;
601 break;
602
603 case AX25_T3:
604 if (opt < 1 || opt > ULONG_MAX / HZ) {
605 res = -EINVAL;
606 break;
607 }
608 ax25->t3 = opt * HZ;
609 break;
610
611 case AX25_IDLE:
612 if (opt > ULONG_MAX / (60 * HZ)) {
613 res = -EINVAL;
614 break;
615 }
616 ax25->idle = opt * 60 * HZ;
617 break;
618
619 case AX25_BACKOFF:
620 if (opt > 2) {
621 res = -EINVAL;
622 break;
623 }
624 ax25->backoff = opt;
625 break;
626
627 case AX25_EXTSEQ:
628 ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
629 break;
630
631 case AX25_PIDINCL:
632 ax25->pidincl = opt ? 1 : 0;
633 break;
634
635 case AX25_IAMDIGI:
636 ax25->iamdigi = opt ? 1 : 0;
637 break;
638
639 case AX25_PACLEN:
640 if (opt < 16 || opt > 65535) {
641 res = -EINVAL;
642 break;
643 }
644 ax25->paclen = opt;
645 break;
646
647 case SO_BINDTODEVICE:
648 if (optlen > IFNAMSIZ)
649 optlen = IFNAMSIZ;
650
651 if (copy_from_user(devname, optval, optlen)) {
652 res = -EFAULT;
653 break;
654 }
655
656 if (sk->sk_type == SOCK_SEQPACKET &&
657 (sock->state != SS_UNCONNECTED ||
658 sk->sk_state == TCP_LISTEN)) {
659 res = -EADDRNOTAVAIL;
660 break;
661 }
662
663 dev = dev_get_by_name(&init_net, devname);
664 if (!dev) {
665 res = -ENODEV;
666 break;
667 }
668
669 ax25->ax25_dev = ax25_dev_ax25dev(dev);
670 ax25_fillin_cb(ax25, ax25->ax25_dev);
671 dev_put(dev);
672 break;
673
674 default:
675 res = -ENOPROTOOPT;
676 }
677 release_sock(sk);
678
679 return res;
680}
681
682static int ax25_getsockopt(struct socket *sock, int level, int optname,
683 char __user *optval, int __user *optlen)
684{
685 struct sock *sk = sock->sk;
686 ax25_cb *ax25;
687 struct ax25_dev *ax25_dev;
688 char devname[IFNAMSIZ];
689 void *valptr;
690 int val = 0;
691 int maxlen, length;
692
693 if (level != SOL_AX25)
694 return -ENOPROTOOPT;
695
696 if (get_user(maxlen, optlen))
697 return -EFAULT;
698
699 if (maxlen < 1)
700 return -EFAULT;
701
702 valptr = (void *) &val;
703 length = min_t(unsigned int, maxlen, sizeof(int));
704
705 lock_sock(sk);
706 ax25 = ax25_sk(sk);
707
708 switch (optname) {
709 case AX25_WINDOW:
710 val = ax25->window;
711 break;
712
713 case AX25_T1:
714 val = ax25->t1 / HZ;
715 break;
716
717 case AX25_T2:
718 val = ax25->t2 / HZ;
719 break;
720
721 case AX25_N2:
722 val = ax25->n2;
723 break;
724
725 case AX25_T3:
726 val = ax25->t3 / HZ;
727 break;
728
729 case AX25_IDLE:
730 val = ax25->idle / (60 * HZ);
731 break;
732
733 case AX25_BACKOFF:
734 val = ax25->backoff;
735 break;
736
737 case AX25_EXTSEQ:
738 val = (ax25->modulus == AX25_EMODULUS);
739 break;
740
741 case AX25_PIDINCL:
742 val = ax25->pidincl;
743 break;
744
745 case AX25_IAMDIGI:
746 val = ax25->iamdigi;
747 break;
748
749 case AX25_PACLEN:
750 val = ax25->paclen;
751 break;
752
753 case SO_BINDTODEVICE:
754 ax25_dev = ax25->ax25_dev;
755
756 if (ax25_dev != NULL && ax25_dev->dev != NULL) {
757 strlcpy(devname, ax25_dev->dev->name, sizeof(devname));
758 length = strlen(devname) + 1;
759 } else {
760 *devname = '\0';
761 length = 1;
762 }
763
764 valptr = (void *) devname;
765 break;
766
767 default:
768 release_sock(sk);
769 return -ENOPROTOOPT;
770 }
771 release_sock(sk);
772
773 if (put_user(length, optlen))
774 return -EFAULT;
775
776 return copy_to_user(optval, valptr, length) ? -EFAULT : 0;
777}
778
779static int ax25_listen(struct socket *sock, int backlog)
780{
781 struct sock *sk = sock->sk;
782 int res = 0;
783
784 lock_sock(sk);
785 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) {
786 sk->sk_max_ack_backlog = backlog;
787 sk->sk_state = TCP_LISTEN;
788 goto out;
789 }
790 res = -EOPNOTSUPP;
791
792out:
793 release_sock(sk);
794
795 return res;
796}
797
798
799
800
801
802static struct proto ax25_proto = {
803 .name = "AX25",
804 .owner = THIS_MODULE,
805 .obj_size = sizeof(struct sock),
806};
807
808static int ax25_create(struct net *net, struct socket *sock, int protocol,
809 int kern)
810{
811 struct sock *sk;
812 ax25_cb *ax25;
813
814 if (!net_eq(net, &init_net))
815 return -EAFNOSUPPORT;
816
817 switch (sock->type) {
818 case SOCK_DGRAM:
819 if (protocol == 0 || protocol == PF_AX25)
820 protocol = AX25_P_TEXT;
821 break;
822
823 case SOCK_SEQPACKET:
824 switch (protocol) {
825 case 0:
826 case PF_AX25:
827 protocol = AX25_P_TEXT;
828 break;
829 case AX25_P_SEGMENT:
830#ifdef CONFIG_INET
831 case AX25_P_ARP:
832 case AX25_P_IP:
833#endif
834#ifdef CONFIG_NETROM
835 case AX25_P_NETROM:
836#endif
837#ifdef CONFIG_ROSE
838 case AX25_P_ROSE:
839#endif
840 return -ESOCKTNOSUPPORT;
841#ifdef CONFIG_NETROM_MODULE
842 case AX25_P_NETROM:
843 if (ax25_protocol_is_registered(AX25_P_NETROM))
844 return -ESOCKTNOSUPPORT;
845 break;
846#endif
847#ifdef CONFIG_ROSE_MODULE
848 case AX25_P_ROSE:
849 if (ax25_protocol_is_registered(AX25_P_ROSE))
850 return -ESOCKTNOSUPPORT;
851#endif
852 default:
853 break;
854 }
855 break;
856
857 case SOCK_RAW:
858 break;
859 default:
860 return -ESOCKTNOSUPPORT;
861 }
862
863 sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto);
864 if (sk == NULL)
865 return -ENOMEM;
866
867 ax25 = sk->sk_protinfo = ax25_create_cb();
868 if (!ax25) {
869 sk_free(sk);
870 return -ENOMEM;
871 }
872
873 sock_init_data(sock, sk);
874
875 sk->sk_destruct = ax25_free_sock;
876 sock->ops = &ax25_proto_ops;
877 sk->sk_protocol = protocol;
878
879 ax25->sk = sk;
880
881 return 0;
882}
883
884struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
885{
886 struct sock *sk;
887 ax25_cb *ax25, *oax25;
888
889 sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot);
890 if (sk == NULL)
891 return NULL;
892
893 if ((ax25 = ax25_create_cb()) == NULL) {
894 sk_free(sk);
895 return NULL;
896 }
897
898 switch (osk->sk_type) {
899 case SOCK_DGRAM:
900 break;
901 case SOCK_SEQPACKET:
902 break;
903 default:
904 sk_free(sk);
905 ax25_cb_put(ax25);
906 return NULL;
907 }
908
909 sock_init_data(NULL, sk);
910
911 sk->sk_type = osk->sk_type;
912 sk->sk_priority = osk->sk_priority;
913 sk->sk_protocol = osk->sk_protocol;
914 sk->sk_rcvbuf = osk->sk_rcvbuf;
915 sk->sk_sndbuf = osk->sk_sndbuf;
916 sk->sk_state = TCP_ESTABLISHED;
917 sock_copy_flags(sk, osk);
918
919 oax25 = ax25_sk(osk);
920
921 ax25->modulus = oax25->modulus;
922 ax25->backoff = oax25->backoff;
923 ax25->pidincl = oax25->pidincl;
924 ax25->iamdigi = oax25->iamdigi;
925 ax25->rtt = oax25->rtt;
926 ax25->t1 = oax25->t1;
927 ax25->t2 = oax25->t2;
928 ax25->t3 = oax25->t3;
929 ax25->n2 = oax25->n2;
930 ax25->idle = oax25->idle;
931 ax25->paclen = oax25->paclen;
932 ax25->window = oax25->window;
933
934 ax25->ax25_dev = ax25_dev;
935 ax25->source_addr = oax25->source_addr;
936
937 if (oax25->digipeat != NULL) {
938 ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
939 GFP_ATOMIC);
940 if (ax25->digipeat == NULL) {
941 sk_free(sk);
942 ax25_cb_put(ax25);
943 return NULL;
944 }
945 }
946
947 sk->sk_protinfo = ax25;
948 sk->sk_destruct = ax25_free_sock;
949 ax25->sk = sk;
950
951 return sk;
952}
953
954static int ax25_release(struct socket *sock)
955{
956 struct sock *sk = sock->sk;
957 ax25_cb *ax25;
958
959 if (sk == NULL)
960 return 0;
961
962 sock_hold(sk);
963 sock_orphan(sk);
964 lock_sock(sk);
965 ax25 = ax25_sk(sk);
966
967 if (sk->sk_type == SOCK_SEQPACKET) {
968 switch (ax25->state) {
969 case AX25_STATE_0:
970 release_sock(sk);
971 ax25_disconnect(ax25, 0);
972 lock_sock(sk);
973 ax25_destroy_socket(ax25);
974 break;
975
976 case AX25_STATE_1:
977 case AX25_STATE_2:
978 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
979 release_sock(sk);
980 ax25_disconnect(ax25, 0);
981 lock_sock(sk);
982 ax25_destroy_socket(ax25);
983 break;
984
985 case AX25_STATE_3:
986 case AX25_STATE_4:
987 ax25_clear_queues(ax25);
988 ax25->n2count = 0;
989
990 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
991 case AX25_PROTO_STD_SIMPLEX:
992 case AX25_PROTO_STD_DUPLEX:
993 ax25_send_control(ax25,
994 AX25_DISC,
995 AX25_POLLON,
996 AX25_COMMAND);
997 ax25_stop_t2timer(ax25);
998 ax25_stop_t3timer(ax25);
999 ax25_stop_idletimer(ax25);
1000 break;
1001#ifdef CONFIG_AX25_DAMA_SLAVE
1002 case AX25_PROTO_DAMA_SLAVE:
1003 ax25_stop_t3timer(ax25);
1004 ax25_stop_idletimer(ax25);
1005 break;
1006#endif
1007 }
1008 ax25_calculate_t1(ax25);
1009 ax25_start_t1timer(ax25);
1010 ax25->state = AX25_STATE_2;
1011 sk->sk_state = TCP_CLOSE;
1012 sk->sk_shutdown |= SEND_SHUTDOWN;
1013 sk->sk_state_change(sk);
1014 sock_set_flag(sk, SOCK_DESTROY);
1015 break;
1016
1017 default:
1018 break;
1019 }
1020 } else {
1021 sk->sk_state = TCP_CLOSE;
1022 sk->sk_shutdown |= SEND_SHUTDOWN;
1023 sk->sk_state_change(sk);
1024 ax25_destroy_socket(ax25);
1025 }
1026
1027 sock->sk = NULL;
1028 release_sock(sk);
1029 sock_put(sk);
1030
1031 return 0;
1032}
1033
1034
1035
1036
1037
1038
1039
1040static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1041{
1042 struct sock *sk = sock->sk;
1043 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
1044 ax25_dev *ax25_dev = NULL;
1045 ax25_uid_assoc *user;
1046 ax25_address call;
1047 ax25_cb *ax25;
1048 int err = 0;
1049
1050 if (addr_len != sizeof(struct sockaddr_ax25) &&
1051 addr_len != sizeof(struct full_sockaddr_ax25))
1052
1053
1054
1055 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1056 (addr_len > sizeof(struct full_sockaddr_ax25)))
1057 return -EINVAL;
1058
1059 if (addr->fsa_ax25.sax25_family != AF_AX25)
1060 return -EINVAL;
1061
1062 user = ax25_findbyuid(current_euid());
1063 if (user) {
1064 call = user->call;
1065 ax25_uid_put(user);
1066 } else {
1067 if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
1068 return -EACCES;
1069
1070 call = addr->fsa_ax25.sax25_call;
1071 }
1072
1073 lock_sock(sk);
1074
1075 ax25 = ax25_sk(sk);
1076 if (!sock_flag(sk, SOCK_ZAPPED)) {
1077 err = -EINVAL;
1078 goto out;
1079 }
1080
1081 ax25->source_addr = call;
1082
1083
1084
1085
1086 if (ax25->ax25_dev != NULL)
1087 goto done;
1088
1089 if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
1090 if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
1091 (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
1092 err = -EADDRNOTAVAIL;
1093 goto out;
1094 }
1095 } else {
1096 if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
1097 err = -EADDRNOTAVAIL;
1098 goto out;
1099 }
1100 }
1101
1102 if (ax25_dev != NULL)
1103 ax25_fillin_cb(ax25, ax25_dev);
1104
1105done:
1106 ax25_cb_add(ax25);
1107 sock_reset_flag(sk, SOCK_ZAPPED);
1108
1109out:
1110 release_sock(sk);
1111
1112 return err;
1113}
1114
1115
1116
1117
1118static int __must_check ax25_connect(struct socket *sock,
1119 struct sockaddr *uaddr, int addr_len, int flags)
1120{
1121 struct sock *sk = sock->sk;
1122 ax25_cb *ax25 = ax25_sk(sk), *ax25t;
1123 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1124 ax25_digi *digi = NULL;
1125 int ct = 0, err = 0;
1126
1127
1128
1129
1130
1131 if (addr_len == sizeof(struct sockaddr_ax25))
1132
1133
1134
1135 ;
1136 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1137
1138
1139
1140 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1141 (addr_len > sizeof(struct full_sockaddr_ax25)))
1142 return -EINVAL;
1143
1144
1145 if (fsa->fsa_ax25.sax25_family != AF_AX25)
1146 return -EINVAL;
1147
1148 lock_sock(sk);
1149
1150
1151 if (sock->state == SS_CONNECTING) {
1152 switch (sk->sk_state) {
1153 case TCP_SYN_SENT:
1154 err = -EINPROGRESS;
1155 goto out_release;
1156
1157 case TCP_ESTABLISHED:
1158 sock->state = SS_CONNECTED;
1159 goto out_release;
1160
1161 case TCP_CLOSE:
1162 sock->state = SS_UNCONNECTED;
1163 err = -ECONNREFUSED;
1164 goto out_release;
1165 }
1166 }
1167
1168 if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
1169 err = -EISCONN;
1170 goto out_release;
1171 }
1172
1173 sk->sk_state = TCP_CLOSE;
1174 sock->state = SS_UNCONNECTED;
1175
1176 kfree(ax25->digipeat);
1177 ax25->digipeat = NULL;
1178
1179
1180
1181
1182 if (addr_len > sizeof(struct sockaddr_ax25) &&
1183 fsa->fsa_ax25.sax25_ndigis != 0) {
1184
1185 if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) {
1186 err = -EINVAL;
1187 goto out_release;
1188 }
1189
1190 if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
1191 err = -ENOBUFS;
1192 goto out_release;
1193 }
1194
1195 digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
1196 digi->lastrepeat = -1;
1197
1198 while (ct < fsa->fsa_ax25.sax25_ndigis) {
1199 if ((fsa->fsa_digipeater[ct].ax25_call[6] &
1200 AX25_HBIT) && ax25->iamdigi) {
1201 digi->repeated[ct] = 1;
1202 digi->lastrepeat = ct;
1203 } else {
1204 digi->repeated[ct] = 0;
1205 }
1206 digi->calls[ct] = fsa->fsa_digipeater[ct];
1207 ct++;
1208 }
1209 }
1210
1211
1212
1213
1214
1215
1216 if (sock_flag(sk, SOCK_ZAPPED)) {
1217
1218 printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n",
1219 current->comm);
1220 if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) {
1221 kfree(digi);
1222 goto out_release;
1223 }
1224
1225 ax25_fillin_cb(ax25, ax25->ax25_dev);
1226 ax25_cb_add(ax25);
1227 } else {
1228 if (ax25->ax25_dev == NULL) {
1229 kfree(digi);
1230 err = -EHOSTUNREACH;
1231 goto out_release;
1232 }
1233 }
1234
1235 if (sk->sk_type == SOCK_SEQPACKET &&
1236 (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
1237 ax25->ax25_dev->dev))) {
1238 kfree(digi);
1239 err = -EADDRINUSE;
1240 ax25_cb_put(ax25t);
1241 goto out_release;
1242 }
1243
1244 ax25->dest_addr = fsa->fsa_ax25.sax25_call;
1245 ax25->digipeat = digi;
1246
1247
1248 if (sk->sk_type != SOCK_SEQPACKET) {
1249 sock->state = SS_CONNECTED;
1250 sk->sk_state = TCP_ESTABLISHED;
1251 goto out_release;
1252 }
1253
1254
1255 sock->state = SS_CONNECTING;
1256 sk->sk_state = TCP_SYN_SENT;
1257
1258 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1259 case AX25_PROTO_STD_SIMPLEX:
1260 case AX25_PROTO_STD_DUPLEX:
1261 ax25_std_establish_data_link(ax25);
1262 break;
1263
1264#ifdef CONFIG_AX25_DAMA_SLAVE
1265 case AX25_PROTO_DAMA_SLAVE:
1266 ax25->modulus = AX25_MODULUS;
1267 ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
1268 if (ax25->ax25_dev->dama.slave)
1269 ax25_ds_establish_data_link(ax25);
1270 else
1271 ax25_std_establish_data_link(ax25);
1272 break;
1273#endif
1274 }
1275
1276 ax25->state = AX25_STATE_1;
1277
1278 ax25_start_heartbeat(ax25);
1279
1280
1281 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
1282 err = -EINPROGRESS;
1283 goto out_release;
1284 }
1285
1286 if (sk->sk_state == TCP_SYN_SENT) {
1287 DEFINE_WAIT(wait);
1288
1289 for (;;) {
1290 prepare_to_wait(sk_sleep(sk), &wait,
1291 TASK_INTERRUPTIBLE);
1292 if (sk->sk_state != TCP_SYN_SENT)
1293 break;
1294 if (!signal_pending(current)) {
1295 release_sock(sk);
1296 schedule();
1297 lock_sock(sk);
1298 continue;
1299 }
1300 err = -ERESTARTSYS;
1301 break;
1302 }
1303 finish_wait(sk_sleep(sk), &wait);
1304
1305 if (err)
1306 goto out_release;
1307 }
1308
1309 if (sk->sk_state != TCP_ESTABLISHED) {
1310
1311 sock->state = SS_UNCONNECTED;
1312 err = sock_error(sk);
1313 goto out_release;
1314 }
1315
1316 sock->state = SS_CONNECTED;
1317
1318 err = 0;
1319out_release:
1320 release_sock(sk);
1321
1322 return err;
1323}
1324
1325static int ax25_accept(struct socket *sock, struct socket *newsock, int flags)
1326{
1327 struct sk_buff *skb;
1328 struct sock *newsk;
1329 DEFINE_WAIT(wait);
1330 struct sock *sk;
1331 int err = 0;
1332
1333 if (sock->state != SS_UNCONNECTED)
1334 return -EINVAL;
1335
1336 if ((sk = sock->sk) == NULL)
1337 return -EINVAL;
1338
1339 lock_sock(sk);
1340 if (sk->sk_type != SOCK_SEQPACKET) {
1341 err = -EOPNOTSUPP;
1342 goto out;
1343 }
1344
1345 if (sk->sk_state != TCP_LISTEN) {
1346 err = -EINVAL;
1347 goto out;
1348 }
1349
1350
1351
1352
1353
1354 for (;;) {
1355 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1356 skb = skb_dequeue(&sk->sk_receive_queue);
1357 if (skb)
1358 break;
1359
1360 if (flags & O_NONBLOCK) {
1361 err = -EWOULDBLOCK;
1362 break;
1363 }
1364 if (!signal_pending(current)) {
1365 release_sock(sk);
1366 schedule();
1367 lock_sock(sk);
1368 continue;
1369 }
1370 err = -ERESTARTSYS;
1371 break;
1372 }
1373 finish_wait(sk_sleep(sk), &wait);
1374
1375 if (err)
1376 goto out;
1377
1378 newsk = skb->sk;
1379 sock_graft(newsk, newsock);
1380
1381
1382 kfree_skb(skb);
1383 sk->sk_ack_backlog--;
1384 newsock->state = SS_CONNECTED;
1385
1386out:
1387 release_sock(sk);
1388
1389 return err;
1390}
1391
1392static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
1393 int *uaddr_len, int peer)
1394{
1395 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1396 struct sock *sk = sock->sk;
1397 unsigned char ndigi, i;
1398 ax25_cb *ax25;
1399 int err = 0;
1400
1401 memset(fsa, 0, sizeof(*fsa));
1402 lock_sock(sk);
1403 ax25 = ax25_sk(sk);
1404
1405 if (peer != 0) {
1406 if (sk->sk_state != TCP_ESTABLISHED) {
1407 err = -ENOTCONN;
1408 goto out;
1409 }
1410
1411 fsa->fsa_ax25.sax25_family = AF_AX25;
1412 fsa->fsa_ax25.sax25_call = ax25->dest_addr;
1413
1414 if (ax25->digipeat != NULL) {
1415 ndigi = ax25->digipeat->ndigi;
1416 fsa->fsa_ax25.sax25_ndigis = ndigi;
1417 for (i = 0; i < ndigi; i++)
1418 fsa->fsa_digipeater[i] =
1419 ax25->digipeat->calls[i];
1420 }
1421 } else {
1422 fsa->fsa_ax25.sax25_family = AF_AX25;
1423 fsa->fsa_ax25.sax25_call = ax25->source_addr;
1424 fsa->fsa_ax25.sax25_ndigis = 1;
1425 if (ax25->ax25_dev != NULL) {
1426 memcpy(&fsa->fsa_digipeater[0],
1427 ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
1428 } else {
1429 fsa->fsa_digipeater[0] = null_ax25_address;
1430 }
1431 }
1432 *uaddr_len = sizeof (struct full_sockaddr_ax25);
1433
1434out:
1435 release_sock(sk);
1436
1437 return err;
1438}
1439
1440static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock,
1441 struct msghdr *msg, size_t len)
1442{
1443 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1444 struct sock *sk = sock->sk;
1445 struct sockaddr_ax25 sax;
1446 struct sk_buff *skb;
1447 ax25_digi dtmp, *dp;
1448 ax25_cb *ax25;
1449 size_t size;
1450 int lv, err, addr_len = msg->msg_namelen;
1451
1452 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1453 return -EINVAL;
1454
1455 lock_sock(sk);
1456 ax25 = ax25_sk(sk);
1457
1458 if (sock_flag(sk, SOCK_ZAPPED)) {
1459 err = -EADDRNOTAVAIL;
1460 goto out;
1461 }
1462
1463 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1464 send_sig(SIGPIPE, current, 0);
1465 err = -EPIPE;
1466 goto out;
1467 }
1468
1469 if (ax25->ax25_dev == NULL) {
1470 err = -ENETUNREACH;
1471 goto out;
1472 }
1473
1474 if (len > ax25->ax25_dev->dev->mtu) {
1475 err = -EMSGSIZE;
1476 goto out;
1477 }
1478
1479 if (usax != NULL) {
1480 if (usax->sax25_family != AF_AX25) {
1481 err = -EINVAL;
1482 goto out;
1483 }
1484
1485 if (addr_len == sizeof(struct sockaddr_ax25))
1486
1487 ;
1488 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1489
1490
1491
1492
1493 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1494 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1495 err = -EINVAL;
1496 goto out;
1497 }
1498
1499
1500 if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
1501 int ct = 0;
1502 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
1503
1504
1505 if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) {
1506 err = -EINVAL;
1507 goto out;
1508 }
1509
1510 dtmp.ndigi = usax->sax25_ndigis;
1511
1512 while (ct < usax->sax25_ndigis) {
1513 dtmp.repeated[ct] = 0;
1514 dtmp.calls[ct] = fsa->fsa_digipeater[ct];
1515 ct++;
1516 }
1517
1518 dtmp.lastrepeat = 0;
1519 }
1520
1521 sax = *usax;
1522 if (sk->sk_type == SOCK_SEQPACKET &&
1523 ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
1524 err = -EISCONN;
1525 goto out;
1526 }
1527 if (usax->sax25_ndigis == 0)
1528 dp = NULL;
1529 else
1530 dp = &dtmp;
1531 } else {
1532
1533
1534
1535
1536
1537 if (sk->sk_state != TCP_ESTABLISHED) {
1538 err = -ENOTCONN;
1539 goto out;
1540 }
1541 sax.sax25_family = AF_AX25;
1542 sax.sax25_call = ax25->dest_addr;
1543 dp = ax25->digipeat;
1544 }
1545
1546
1547
1548 size = len + ax25->ax25_dev->dev->hard_header_len;
1549
1550 skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
1551 if (skb == NULL)
1552 goto out;
1553
1554 skb_reserve(skb, size - len);
1555
1556
1557 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
1558 err = -EFAULT;
1559 kfree_skb(skb);
1560 goto out;
1561 }
1562
1563 skb_reset_network_header(skb);
1564
1565
1566 if (!ax25->pidincl)
1567 *skb_push(skb, 1) = sk->sk_protocol;
1568
1569 if (sk->sk_type == SOCK_SEQPACKET) {
1570
1571 if (sk->sk_state != TCP_ESTABLISHED) {
1572 kfree_skb(skb);
1573 err = -ENOTCONN;
1574 goto out;
1575 }
1576
1577
1578 ax25_output(ax25, ax25->paclen, skb);
1579
1580 err = len;
1581 goto out;
1582 }
1583
1584 skb_push(skb, 1 + ax25_addr_size(dp));
1585
1586
1587
1588
1589 lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
1590 dp, AX25_COMMAND, AX25_MODULUS);
1591
1592 skb_set_transport_header(skb, lv);
1593
1594 *skb_transport_header(skb) = AX25_UI;
1595
1596
1597 ax25_queue_xmit(skb, ax25->ax25_dev->dev);
1598
1599 err = len;
1600
1601out:
1602 release_sock(sk);
1603
1604 return err;
1605}
1606
1607static int ax25_recvmsg(struct kiocb *iocb, struct socket *sock,
1608 struct msghdr *msg, size_t size, int flags)
1609{
1610 struct sock *sk = sock->sk;
1611 struct sk_buff *skb;
1612 int copied;
1613 int err = 0;
1614
1615 lock_sock(sk);
1616
1617
1618
1619
1620 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
1621 err = -ENOTCONN;
1622 goto out;
1623 }
1624
1625
1626 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1627 flags & MSG_DONTWAIT, &err);
1628 if (skb == NULL)
1629 goto out;
1630
1631 if (!ax25_sk(sk)->pidincl)
1632 skb_pull(skb, 1);
1633
1634 skb_reset_transport_header(skb);
1635 copied = skb->len;
1636
1637 if (copied > size) {
1638 copied = size;
1639 msg->msg_flags |= MSG_TRUNC;
1640 }
1641
1642 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1643
1644 if (msg->msg_namelen != 0) {
1645 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1646 ax25_digi digi;
1647 ax25_address src;
1648 const unsigned char *mac = skb_mac_header(skb);
1649
1650 ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL,
1651 &digi, NULL, NULL);
1652 sax->sax25_family = AF_AX25;
1653
1654
1655
1656 sax->sax25_ndigis = digi.ndigi;
1657 sax->sax25_call = src;
1658
1659 if (sax->sax25_ndigis != 0) {
1660 int ct;
1661 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
1662
1663 for (ct = 0; ct < digi.ndigi; ct++)
1664 fsa->fsa_digipeater[ct] = digi.calls[ct];
1665 }
1666 msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
1667 }
1668
1669 skb_free_datagram(sk, skb);
1670 err = copied;
1671
1672out:
1673 release_sock(sk);
1674
1675 return err;
1676}
1677
1678static int ax25_shutdown(struct socket *sk, int how)
1679{
1680
1681 return -EOPNOTSUPP;
1682}
1683
1684static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1685{
1686 struct sock *sk = sock->sk;
1687 void __user *argp = (void __user *)arg;
1688 int res = 0;
1689
1690 lock_sock(sk);
1691 switch (cmd) {
1692 case TIOCOUTQ: {
1693 long amount;
1694
1695 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1696 if (amount < 0)
1697 amount = 0;
1698 res = put_user(amount, (int __user *)argp);
1699 break;
1700 }
1701
1702 case TIOCINQ: {
1703 struct sk_buff *skb;
1704 long amount = 0L;
1705
1706 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1707 amount = skb->len;
1708 res = put_user(amount, (int __user *) argp);
1709 break;
1710 }
1711
1712 case SIOCGSTAMP:
1713 res = sock_get_timestamp(sk, argp);
1714 break;
1715
1716 case SIOCGSTAMPNS:
1717 res = sock_get_timestampns(sk, argp);
1718 break;
1719
1720 case SIOCAX25ADDUID:
1721 case SIOCAX25DELUID:
1722 case SIOCAX25GETUID: {
1723 struct sockaddr_ax25 sax25;
1724 if (copy_from_user(&sax25, argp, sizeof(sax25))) {
1725 res = -EFAULT;
1726 break;
1727 }
1728 res = ax25_uid_ioctl(cmd, &sax25);
1729 break;
1730 }
1731
1732 case SIOCAX25NOUID: {
1733 long amount;
1734 if (!capable(CAP_NET_ADMIN)) {
1735 res = -EPERM;
1736 break;
1737 }
1738 if (get_user(amount, (long __user *)argp)) {
1739 res = -EFAULT;
1740 break;
1741 }
1742 if (amount > AX25_NOUID_BLOCK) {
1743 res = -EINVAL;
1744 break;
1745 }
1746 ax25_uid_policy = amount;
1747 res = 0;
1748 break;
1749 }
1750
1751 case SIOCADDRT:
1752 case SIOCDELRT:
1753 case SIOCAX25OPTRT:
1754 if (!capable(CAP_NET_ADMIN)) {
1755 res = -EPERM;
1756 break;
1757 }
1758 res = ax25_rt_ioctl(cmd, argp);
1759 break;
1760
1761 case SIOCAX25CTLCON:
1762 if (!capable(CAP_NET_ADMIN)) {
1763 res = -EPERM;
1764 break;
1765 }
1766 res = ax25_ctl_ioctl(cmd, argp);
1767 break;
1768
1769 case SIOCAX25GETINFO:
1770 case SIOCAX25GETINFOOLD: {
1771 ax25_cb *ax25 = ax25_sk(sk);
1772 struct ax25_info_struct ax25_info;
1773
1774 ax25_info.t1 = ax25->t1 / HZ;
1775 ax25_info.t2 = ax25->t2 / HZ;
1776 ax25_info.t3 = ax25->t3 / HZ;
1777 ax25_info.idle = ax25->idle / (60 * HZ);
1778 ax25_info.n2 = ax25->n2;
1779 ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
1780 ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
1781 ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
1782 ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
1783 ax25_info.n2count = ax25->n2count;
1784 ax25_info.state = ax25->state;
1785 ax25_info.rcv_q = sk_rmem_alloc_get(sk);
1786 ax25_info.snd_q = sk_wmem_alloc_get(sk);
1787 ax25_info.vs = ax25->vs;
1788 ax25_info.vr = ax25->vr;
1789 ax25_info.va = ax25->va;
1790 ax25_info.vs_max = ax25->vs;
1791 ax25_info.paclen = ax25->paclen;
1792 ax25_info.window = ax25->window;
1793
1794
1795 if (cmd == SIOCAX25GETINFOOLD) {
1796 static int warned = 0;
1797 if (!warned) {
1798 printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
1799 current->comm);
1800 warned=1;
1801 }
1802
1803 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
1804 res = -EFAULT;
1805 break;
1806 }
1807 } else {
1808 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
1809 res = -EINVAL;
1810 break;
1811 }
1812 }
1813 res = 0;
1814 break;
1815 }
1816
1817 case SIOCAX25ADDFWD:
1818 case SIOCAX25DELFWD: {
1819 struct ax25_fwd_struct ax25_fwd;
1820 if (!capable(CAP_NET_ADMIN)) {
1821 res = -EPERM;
1822 break;
1823 }
1824 if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
1825 res = -EFAULT;
1826 break;
1827 }
1828 res = ax25_fwd_ioctl(cmd, &ax25_fwd);
1829 break;
1830 }
1831
1832 case SIOCGIFADDR:
1833 case SIOCSIFADDR:
1834 case SIOCGIFDSTADDR:
1835 case SIOCSIFDSTADDR:
1836 case SIOCGIFBRDADDR:
1837 case SIOCSIFBRDADDR:
1838 case SIOCGIFNETMASK:
1839 case SIOCSIFNETMASK:
1840 case SIOCGIFMETRIC:
1841 case SIOCSIFMETRIC:
1842 res = -EINVAL;
1843 break;
1844
1845 default:
1846 res = -ENOIOCTLCMD;
1847 break;
1848 }
1849 release_sock(sk);
1850
1851 return res;
1852}
1853
1854#ifdef CONFIG_PROC_FS
1855
1856static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
1857 __acquires(ax25_list_lock)
1858{
1859 spin_lock_bh(&ax25_list_lock);
1860 return seq_hlist_start(&ax25_list, *pos);
1861}
1862
1863static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
1864{
1865 return seq_hlist_next(v, &ax25_list, pos);
1866}
1867
1868static void ax25_info_stop(struct seq_file *seq, void *v)
1869 __releases(ax25_list_lock)
1870{
1871 spin_unlock_bh(&ax25_list_lock);
1872}
1873
1874static int ax25_info_show(struct seq_file *seq, void *v)
1875{
1876 ax25_cb *ax25 = hlist_entry(v, struct ax25_cb, ax25_node);
1877 char buf[11];
1878 int k;
1879
1880
1881
1882
1883
1884
1885
1886 seq_printf(seq, "%8.8lx %s %s%s ",
1887 (long) ax25,
1888 ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
1889 ax2asc(buf, &ax25->source_addr),
1890 ax25->iamdigi? "*":"");
1891 seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
1892
1893 for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
1894 seq_printf(seq, ",%s%s",
1895 ax2asc(buf, &ax25->digipeat->calls[k]),
1896 ax25->digipeat->repeated[k]? "*":"");
1897 }
1898
1899 seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
1900 ax25->state,
1901 ax25->vs, ax25->vr, ax25->va,
1902 ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
1903 ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
1904 ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
1905 ax25_display_timer(&ax25->idletimer) / (60 * HZ),
1906 ax25->idle / (60 * HZ),
1907 ax25->n2count, ax25->n2,
1908 ax25->rtt / HZ,
1909 ax25->window,
1910 ax25->paclen);
1911
1912 if (ax25->sk != NULL) {
1913 seq_printf(seq, " %d %d %lu\n",
1914 sk_wmem_alloc_get(ax25->sk),
1915 sk_rmem_alloc_get(ax25->sk),
1916 sock_i_ino(ax25->sk));
1917 } else {
1918 seq_puts(seq, " * * *\n");
1919 }
1920 return 0;
1921}
1922
1923static const struct seq_operations ax25_info_seqops = {
1924 .start = ax25_info_start,
1925 .next = ax25_info_next,
1926 .stop = ax25_info_stop,
1927 .show = ax25_info_show,
1928};
1929
1930static int ax25_info_open(struct inode *inode, struct file *file)
1931{
1932 return seq_open(file, &ax25_info_seqops);
1933}
1934
1935static const struct file_operations ax25_info_fops = {
1936 .owner = THIS_MODULE,
1937 .open = ax25_info_open,
1938 .read = seq_read,
1939 .llseek = seq_lseek,
1940 .release = seq_release,
1941};
1942
1943#endif
1944
1945static const struct net_proto_family ax25_family_ops = {
1946 .family = PF_AX25,
1947 .create = ax25_create,
1948 .owner = THIS_MODULE,
1949};
1950
1951static const struct proto_ops ax25_proto_ops = {
1952 .family = PF_AX25,
1953 .owner = THIS_MODULE,
1954 .release = ax25_release,
1955 .bind = ax25_bind,
1956 .connect = ax25_connect,
1957 .socketpair = sock_no_socketpair,
1958 .accept = ax25_accept,
1959 .getname = ax25_getname,
1960 .poll = datagram_poll,
1961 .ioctl = ax25_ioctl,
1962 .listen = ax25_listen,
1963 .shutdown = ax25_shutdown,
1964 .setsockopt = ax25_setsockopt,
1965 .getsockopt = ax25_getsockopt,
1966 .sendmsg = ax25_sendmsg,
1967 .recvmsg = ax25_recvmsg,
1968 .mmap = sock_no_mmap,
1969 .sendpage = sock_no_sendpage,
1970};
1971
1972
1973
1974
1975static struct packet_type ax25_packet_type __read_mostly = {
1976 .type = cpu_to_be16(ETH_P_AX25),
1977 .func = ax25_kiss_rcv,
1978};
1979
1980static struct notifier_block ax25_dev_notifier = {
1981 .notifier_call =ax25_device_event,
1982};
1983
1984static int __init ax25_init(void)
1985{
1986 int rc = proto_register(&ax25_proto, 0);
1987
1988 if (rc != 0)
1989 goto out;
1990
1991 sock_register(&ax25_family_ops);
1992 dev_add_pack(&ax25_packet_type);
1993 register_netdevice_notifier(&ax25_dev_notifier);
1994
1995 proc_net_fops_create(&init_net, "ax25_route", S_IRUGO, &ax25_route_fops);
1996 proc_net_fops_create(&init_net, "ax25", S_IRUGO, &ax25_info_fops);
1997 proc_net_fops_create(&init_net, "ax25_calls", S_IRUGO, &ax25_uid_fops);
1998out:
1999 return rc;
2000}
2001module_init(ax25_init);
2002
2003
2004MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
2005MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
2006MODULE_LICENSE("GPL");
2007MODULE_ALIAS_NETPROTO(PF_AX25);
2008
2009static void __exit ax25_exit(void)
2010{
2011 proc_net_remove(&init_net, "ax25_route");
2012 proc_net_remove(&init_net, "ax25");
2013 proc_net_remove(&init_net, "ax25_calls");
2014
2015 unregister_netdevice_notifier(&ax25_dev_notifier);
2016
2017 dev_remove_pack(&ax25_packet_type);
2018
2019 sock_unregister(PF_AX25);
2020 proto_unregister(&ax25_proto);
2021
2022 ax25_rt_free();
2023 ax25_uid_free();
2024 ax25_dev_free();
2025}
2026module_exit(ax25_exit);
2027
