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netlink: make nlmsg_end() and genlmsg_end() void
[deliverable/linux.git] / net / ieee802154 / socket.c
1 /*
2 * IEEE802154.4 socket interface
3 *
4 * Copyright 2007, 2008 Siemens AG
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * Written by:
16 * Sergey Lapin <slapin@ossfans.org>
17 * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
18 */
19
20 #include <linux/net.h>
21 #include <linux/capability.h>
22 #include <linux/module.h>
23 #include <linux/if_arp.h>
24 #include <linux/if.h>
25 #include <linux/termios.h> /* For TIOCOUTQ/INQ */
26 #include <linux/list.h>
27 #include <linux/slab.h>
28 #include <net/datalink.h>
29 #include <net/psnap.h>
30 #include <net/sock.h>
31 #include <net/tcp_states.h>
32 #include <net/route.h>
33
34 #include <net/af_ieee802154.h>
35 #include <net/ieee802154_netdev.h>
36
37 /* Utility function for families */
38 static struct net_device*
39 ieee802154_get_dev(struct net *net, const struct ieee802154_addr *addr)
40 {
41 struct net_device *dev = NULL;
42 struct net_device *tmp;
43 __le16 pan_id, short_addr;
44 u8 hwaddr[IEEE802154_ADDR_LEN];
45
46 switch (addr->mode) {
47 case IEEE802154_ADDR_LONG:
48 ieee802154_devaddr_to_raw(hwaddr, addr->extended_addr);
49 rcu_read_lock();
50 dev = dev_getbyhwaddr_rcu(net, ARPHRD_IEEE802154, hwaddr);
51 if (dev)
52 dev_hold(dev);
53 rcu_read_unlock();
54 break;
55 case IEEE802154_ADDR_SHORT:
56 if (addr->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST) ||
57 addr->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) ||
58 addr->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST))
59 break;
60
61 rtnl_lock();
62
63 for_each_netdev(net, tmp) {
64 if (tmp->type != ARPHRD_IEEE802154)
65 continue;
66
67 pan_id = ieee802154_mlme_ops(tmp)->get_pan_id(tmp);
68 short_addr =
69 ieee802154_mlme_ops(tmp)->get_short_addr(tmp);
70
71 if (pan_id == addr->pan_id &&
72 short_addr == addr->short_addr) {
73 dev = tmp;
74 dev_hold(dev);
75 break;
76 }
77 }
78
79 rtnl_unlock();
80 break;
81 default:
82 pr_warn("Unsupported ieee802154 address type: %d\n",
83 addr->mode);
84 break;
85 }
86
87 return dev;
88 }
89
90 static int ieee802154_sock_release(struct socket *sock)
91 {
92 struct sock *sk = sock->sk;
93
94 if (sk) {
95 sock->sk = NULL;
96 sk->sk_prot->close(sk, 0);
97 }
98 return 0;
99 }
100
101 static int ieee802154_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
102 struct msghdr *msg, size_t len)
103 {
104 struct sock *sk = sock->sk;
105
106 return sk->sk_prot->sendmsg(iocb, sk, msg, len);
107 }
108
109 static int ieee802154_sock_bind(struct socket *sock, struct sockaddr *uaddr,
110 int addr_len)
111 {
112 struct sock *sk = sock->sk;
113
114 if (sk->sk_prot->bind)
115 return sk->sk_prot->bind(sk, uaddr, addr_len);
116
117 return sock_no_bind(sock, uaddr, addr_len);
118 }
119
120 static int ieee802154_sock_connect(struct socket *sock, struct sockaddr *uaddr,
121 int addr_len, int flags)
122 {
123 struct sock *sk = sock->sk;
124
125 if (addr_len < sizeof(uaddr->sa_family))
126 return -EINVAL;
127
128 if (uaddr->sa_family == AF_UNSPEC)
129 return sk->sk_prot->disconnect(sk, flags);
130
131 return sk->sk_prot->connect(sk, uaddr, addr_len);
132 }
133
134 static int ieee802154_dev_ioctl(struct sock *sk, struct ifreq __user *arg,
135 unsigned int cmd)
136 {
137 struct ifreq ifr;
138 int ret = -ENOIOCTLCMD;
139 struct net_device *dev;
140
141 if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
142 return -EFAULT;
143
144 ifr.ifr_name[IFNAMSIZ-1] = 0;
145
146 dev_load(sock_net(sk), ifr.ifr_name);
147 dev = dev_get_by_name(sock_net(sk), ifr.ifr_name);
148
149 if (!dev)
150 return -ENODEV;
151
152 if (dev->type == ARPHRD_IEEE802154 && dev->netdev_ops->ndo_do_ioctl)
153 ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, cmd);
154
155 if (!ret && copy_to_user(arg, &ifr, sizeof(struct ifreq)))
156 ret = -EFAULT;
157 dev_put(dev);
158
159 return ret;
160 }
161
162 static int ieee802154_sock_ioctl(struct socket *sock, unsigned int cmd,
163 unsigned long arg)
164 {
165 struct sock *sk = sock->sk;
166
167 switch (cmd) {
168 case SIOCGSTAMP:
169 return sock_get_timestamp(sk, (struct timeval __user *)arg);
170 case SIOCGSTAMPNS:
171 return sock_get_timestampns(sk, (struct timespec __user *)arg);
172 case SIOCGIFADDR:
173 case SIOCSIFADDR:
174 return ieee802154_dev_ioctl(sk, (struct ifreq __user *)arg,
175 cmd);
176 default:
177 if (!sk->sk_prot->ioctl)
178 return -ENOIOCTLCMD;
179 return sk->sk_prot->ioctl(sk, cmd, arg);
180 }
181 }
182
183 /* RAW Sockets (802.15.4 created in userspace) */
184 static HLIST_HEAD(raw_head);
185 static DEFINE_RWLOCK(raw_lock);
186
187 static void raw_hash(struct sock *sk)
188 {
189 write_lock_bh(&raw_lock);
190 sk_add_node(sk, &raw_head);
191 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
192 write_unlock_bh(&raw_lock);
193 }
194
195 static void raw_unhash(struct sock *sk)
196 {
197 write_lock_bh(&raw_lock);
198 if (sk_del_node_init(sk))
199 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
200 write_unlock_bh(&raw_lock);
201 }
202
203 static void raw_close(struct sock *sk, long timeout)
204 {
205 sk_common_release(sk);
206 }
207
208 static int raw_bind(struct sock *sk, struct sockaddr *_uaddr, int len)
209 {
210 struct ieee802154_addr addr;
211 struct sockaddr_ieee802154 *uaddr = (struct sockaddr_ieee802154 *)_uaddr;
212 int err = 0;
213 struct net_device *dev = NULL;
214
215 if (len < sizeof(*uaddr))
216 return -EINVAL;
217
218 uaddr = (struct sockaddr_ieee802154 *)_uaddr;
219 if (uaddr->family != AF_IEEE802154)
220 return -EINVAL;
221
222 lock_sock(sk);
223
224 ieee802154_addr_from_sa(&addr, &uaddr->addr);
225 dev = ieee802154_get_dev(sock_net(sk), &addr);
226 if (!dev) {
227 err = -ENODEV;
228 goto out;
229 }
230
231 if (dev->type != ARPHRD_IEEE802154) {
232 err = -ENODEV;
233 goto out_put;
234 }
235
236 sk->sk_bound_dev_if = dev->ifindex;
237 sk_dst_reset(sk);
238
239 out_put:
240 dev_put(dev);
241 out:
242 release_sock(sk);
243
244 return err;
245 }
246
247 static int raw_connect(struct sock *sk, struct sockaddr *uaddr,
248 int addr_len)
249 {
250 return -ENOTSUPP;
251 }
252
253 static int raw_disconnect(struct sock *sk, int flags)
254 {
255 return 0;
256 }
257
258 static int raw_sendmsg(struct kiocb *iocb, struct sock *sk,
259 struct msghdr *msg, size_t size)
260 {
261 struct net_device *dev;
262 unsigned int mtu;
263 struct sk_buff *skb;
264 int hlen, tlen;
265 int err;
266
267 if (msg->msg_flags & MSG_OOB) {
268 pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags);
269 return -EOPNOTSUPP;
270 }
271
272 lock_sock(sk);
273 if (!sk->sk_bound_dev_if)
274 dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
275 else
276 dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if);
277 release_sock(sk);
278
279 if (!dev) {
280 pr_debug("no dev\n");
281 err = -ENXIO;
282 goto out;
283 }
284
285 mtu = dev->mtu;
286 pr_debug("name = %s, mtu = %u\n", dev->name, mtu);
287
288 if (size > mtu) {
289 pr_debug("size = %Zu, mtu = %u\n", size, mtu);
290 err = -EINVAL;
291 goto out_dev;
292 }
293
294 hlen = LL_RESERVED_SPACE(dev);
295 tlen = dev->needed_tailroom;
296 skb = sock_alloc_send_skb(sk, hlen + tlen + size,
297 msg->msg_flags & MSG_DONTWAIT, &err);
298 if (!skb)
299 goto out_dev;
300
301 skb_reserve(skb, hlen);
302
303 skb_reset_mac_header(skb);
304 skb_reset_network_header(skb);
305
306 err = memcpy_from_msg(skb_put(skb, size), msg, size);
307 if (err < 0)
308 goto out_skb;
309
310 skb->dev = dev;
311 skb->sk = sk;
312 skb->protocol = htons(ETH_P_IEEE802154);
313
314 dev_put(dev);
315
316 err = dev_queue_xmit(skb);
317 if (err > 0)
318 err = net_xmit_errno(err);
319
320 return err ?: size;
321
322 out_skb:
323 kfree_skb(skb);
324 out_dev:
325 dev_put(dev);
326 out:
327 return err;
328 }
329
330 static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
331 size_t len, int noblock, int flags, int *addr_len)
332 {
333 size_t copied = 0;
334 int err = -EOPNOTSUPP;
335 struct sk_buff *skb;
336
337 skb = skb_recv_datagram(sk, flags, noblock, &err);
338 if (!skb)
339 goto out;
340
341 copied = skb->len;
342 if (len < copied) {
343 msg->msg_flags |= MSG_TRUNC;
344 copied = len;
345 }
346
347 err = skb_copy_datagram_msg(skb, 0, msg, copied);
348 if (err)
349 goto done;
350
351 sock_recv_ts_and_drops(msg, sk, skb);
352
353 if (flags & MSG_TRUNC)
354 copied = skb->len;
355 done:
356 skb_free_datagram(sk, skb);
357 out:
358 if (err)
359 return err;
360 return copied;
361 }
362
363 static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb)
364 {
365 skb = skb_share_check(skb, GFP_ATOMIC);
366 if (!skb)
367 return NET_RX_DROP;
368
369 if (sock_queue_rcv_skb(sk, skb) < 0) {
370 kfree_skb(skb);
371 return NET_RX_DROP;
372 }
373
374 return NET_RX_SUCCESS;
375 }
376
377 static void ieee802154_raw_deliver(struct net_device *dev, struct sk_buff *skb)
378 {
379 struct sock *sk;
380
381 read_lock(&raw_lock);
382 sk_for_each(sk, &raw_head) {
383 bh_lock_sock(sk);
384 if (!sk->sk_bound_dev_if ||
385 sk->sk_bound_dev_if == dev->ifindex) {
386 struct sk_buff *clone;
387
388 clone = skb_clone(skb, GFP_ATOMIC);
389 if (clone)
390 raw_rcv_skb(sk, clone);
391 }
392 bh_unlock_sock(sk);
393 }
394 read_unlock(&raw_lock);
395 }
396
397 static int raw_getsockopt(struct sock *sk, int level, int optname,
398 char __user *optval, int __user *optlen)
399 {
400 return -EOPNOTSUPP;
401 }
402
403 static int raw_setsockopt(struct sock *sk, int level, int optname,
404 char __user *optval, unsigned int optlen)
405 {
406 return -EOPNOTSUPP;
407 }
408
409 static struct proto ieee802154_raw_prot = {
410 .name = "IEEE-802.15.4-RAW",
411 .owner = THIS_MODULE,
412 .obj_size = sizeof(struct sock),
413 .close = raw_close,
414 .bind = raw_bind,
415 .sendmsg = raw_sendmsg,
416 .recvmsg = raw_recvmsg,
417 .hash = raw_hash,
418 .unhash = raw_unhash,
419 .connect = raw_connect,
420 .disconnect = raw_disconnect,
421 .getsockopt = raw_getsockopt,
422 .setsockopt = raw_setsockopt,
423 };
424
425 static const struct proto_ops ieee802154_raw_ops = {
426 .family = PF_IEEE802154,
427 .owner = THIS_MODULE,
428 .release = ieee802154_sock_release,
429 .bind = ieee802154_sock_bind,
430 .connect = ieee802154_sock_connect,
431 .socketpair = sock_no_socketpair,
432 .accept = sock_no_accept,
433 .getname = sock_no_getname,
434 .poll = datagram_poll,
435 .ioctl = ieee802154_sock_ioctl,
436 .listen = sock_no_listen,
437 .shutdown = sock_no_shutdown,
438 .setsockopt = sock_common_setsockopt,
439 .getsockopt = sock_common_getsockopt,
440 .sendmsg = ieee802154_sock_sendmsg,
441 .recvmsg = sock_common_recvmsg,
442 .mmap = sock_no_mmap,
443 .sendpage = sock_no_sendpage,
444 #ifdef CONFIG_COMPAT
445 .compat_setsockopt = compat_sock_common_setsockopt,
446 .compat_getsockopt = compat_sock_common_getsockopt,
447 #endif
448 };
449
450 /* DGRAM Sockets (802.15.4 dataframes) */
451 static HLIST_HEAD(dgram_head);
452 static DEFINE_RWLOCK(dgram_lock);
453
454 struct dgram_sock {
455 struct sock sk;
456
457 struct ieee802154_addr src_addr;
458 struct ieee802154_addr dst_addr;
459
460 unsigned int bound:1;
461 unsigned int connected:1;
462 unsigned int want_ack:1;
463 unsigned int secen:1;
464 unsigned int secen_override:1;
465 unsigned int seclevel:3;
466 unsigned int seclevel_override:1;
467 };
468
469 static inline struct dgram_sock *dgram_sk(const struct sock *sk)
470 {
471 return container_of(sk, struct dgram_sock, sk);
472 }
473
474 static void dgram_hash(struct sock *sk)
475 {
476 write_lock_bh(&dgram_lock);
477 sk_add_node(sk, &dgram_head);
478 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
479 write_unlock_bh(&dgram_lock);
480 }
481
482 static void dgram_unhash(struct sock *sk)
483 {
484 write_lock_bh(&dgram_lock);
485 if (sk_del_node_init(sk))
486 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
487 write_unlock_bh(&dgram_lock);
488 }
489
490 static int dgram_init(struct sock *sk)
491 {
492 struct dgram_sock *ro = dgram_sk(sk);
493
494 ro->want_ack = 1;
495 return 0;
496 }
497
498 static void dgram_close(struct sock *sk, long timeout)
499 {
500 sk_common_release(sk);
501 }
502
503 static int dgram_bind(struct sock *sk, struct sockaddr *uaddr, int len)
504 {
505 struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr;
506 struct ieee802154_addr haddr;
507 struct dgram_sock *ro = dgram_sk(sk);
508 int err = -EINVAL;
509 struct net_device *dev;
510
511 lock_sock(sk);
512
513 ro->bound = 0;
514
515 if (len < sizeof(*addr))
516 goto out;
517
518 if (addr->family != AF_IEEE802154)
519 goto out;
520
521 ieee802154_addr_from_sa(&haddr, &addr->addr);
522 dev = ieee802154_get_dev(sock_net(sk), &haddr);
523 if (!dev) {
524 err = -ENODEV;
525 goto out;
526 }
527
528 if (dev->type != ARPHRD_IEEE802154) {
529 err = -ENODEV;
530 goto out_put;
531 }
532
533 ro->src_addr = haddr;
534
535 ro->bound = 1;
536 err = 0;
537 out_put:
538 dev_put(dev);
539 out:
540 release_sock(sk);
541
542 return err;
543 }
544
545 static int dgram_ioctl(struct sock *sk, int cmd, unsigned long arg)
546 {
547 switch (cmd) {
548 case SIOCOUTQ:
549 {
550 int amount = sk_wmem_alloc_get(sk);
551
552 return put_user(amount, (int __user *)arg);
553 }
554
555 case SIOCINQ:
556 {
557 struct sk_buff *skb;
558 unsigned long amount;
559
560 amount = 0;
561 spin_lock_bh(&sk->sk_receive_queue.lock);
562 skb = skb_peek(&sk->sk_receive_queue);
563 if (skb) {
564 /* We will only return the amount
565 * of this packet since that is all
566 * that will be read.
567 */
568 amount = skb->len - ieee802154_hdr_length(skb);
569 }
570 spin_unlock_bh(&sk->sk_receive_queue.lock);
571 return put_user(amount, (int __user *)arg);
572 }
573 }
574
575 return -ENOIOCTLCMD;
576 }
577
578 /* FIXME: autobind */
579 static int dgram_connect(struct sock *sk, struct sockaddr *uaddr,
580 int len)
581 {
582 struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr;
583 struct dgram_sock *ro = dgram_sk(sk);
584 int err = 0;
585
586 if (len < sizeof(*addr))
587 return -EINVAL;
588
589 if (addr->family != AF_IEEE802154)
590 return -EINVAL;
591
592 lock_sock(sk);
593
594 if (!ro->bound) {
595 err = -ENETUNREACH;
596 goto out;
597 }
598
599 ieee802154_addr_from_sa(&ro->dst_addr, &addr->addr);
600 ro->connected = 1;
601
602 out:
603 release_sock(sk);
604 return err;
605 }
606
607 static int dgram_disconnect(struct sock *sk, int flags)
608 {
609 struct dgram_sock *ro = dgram_sk(sk);
610
611 lock_sock(sk);
612 ro->connected = 0;
613 release_sock(sk);
614
615 return 0;
616 }
617
618 static int dgram_sendmsg(struct kiocb *iocb, struct sock *sk,
619 struct msghdr *msg, size_t size)
620 {
621 struct net_device *dev;
622 unsigned int mtu;
623 struct sk_buff *skb;
624 struct ieee802154_mac_cb *cb;
625 struct dgram_sock *ro = dgram_sk(sk);
626 struct ieee802154_addr dst_addr;
627 int hlen, tlen;
628 int err;
629
630 if (msg->msg_flags & MSG_OOB) {
631 pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags);
632 return -EOPNOTSUPP;
633 }
634
635 if (!ro->connected && !msg->msg_name)
636 return -EDESTADDRREQ;
637 else if (ro->connected && msg->msg_name)
638 return -EISCONN;
639
640 if (!ro->bound)
641 dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
642 else
643 dev = ieee802154_get_dev(sock_net(sk), &ro->src_addr);
644
645 if (!dev) {
646 pr_debug("no dev\n");
647 err = -ENXIO;
648 goto out;
649 }
650 mtu = dev->mtu;
651 pr_debug("name = %s, mtu = %u\n", dev->name, mtu);
652
653 if (size > mtu) {
654 pr_debug("size = %Zu, mtu = %u\n", size, mtu);
655 err = -EMSGSIZE;
656 goto out_dev;
657 }
658
659 hlen = LL_RESERVED_SPACE(dev);
660 tlen = dev->needed_tailroom;
661 skb = sock_alloc_send_skb(sk, hlen + tlen + size,
662 msg->msg_flags & MSG_DONTWAIT,
663 &err);
664 if (!skb)
665 goto out_dev;
666
667 skb_reserve(skb, hlen);
668
669 skb_reset_network_header(skb);
670
671 cb = mac_cb_init(skb);
672 cb->type = IEEE802154_FC_TYPE_DATA;
673 cb->ackreq = ro->want_ack;
674
675 if (msg->msg_name) {
676 DECLARE_SOCKADDR(struct sockaddr_ieee802154*,
677 daddr, msg->msg_name);
678
679 ieee802154_addr_from_sa(&dst_addr, &daddr->addr);
680 } else {
681 dst_addr = ro->dst_addr;
682 }
683
684 cb->secen = ro->secen;
685 cb->secen_override = ro->secen_override;
686 cb->seclevel = ro->seclevel;
687 cb->seclevel_override = ro->seclevel_override;
688
689 err = dev_hard_header(skb, dev, ETH_P_IEEE802154, &dst_addr,
690 ro->bound ? &ro->src_addr : NULL, size);
691 if (err < 0)
692 goto out_skb;
693
694 err = memcpy_from_msg(skb_put(skb, size), msg, size);
695 if (err < 0)
696 goto out_skb;
697
698 skb->dev = dev;
699 skb->sk = sk;
700 skb->protocol = htons(ETH_P_IEEE802154);
701
702 dev_put(dev);
703
704 err = dev_queue_xmit(skb);
705 if (err > 0)
706 err = net_xmit_errno(err);
707
708 return err ?: size;
709
710 out_skb:
711 kfree_skb(skb);
712 out_dev:
713 dev_put(dev);
714 out:
715 return err;
716 }
717
718 static int dgram_recvmsg(struct kiocb *iocb, struct sock *sk,
719 struct msghdr *msg, size_t len, int noblock,
720 int flags, int *addr_len)
721 {
722 size_t copied = 0;
723 int err = -EOPNOTSUPP;
724 struct sk_buff *skb;
725 DECLARE_SOCKADDR(struct sockaddr_ieee802154 *, saddr, msg->msg_name);
726
727 skb = skb_recv_datagram(sk, flags, noblock, &err);
728 if (!skb)
729 goto out;
730
731 copied = skb->len;
732 if (len < copied) {
733 msg->msg_flags |= MSG_TRUNC;
734 copied = len;
735 }
736
737 /* FIXME: skip headers if necessary ?! */
738 err = skb_copy_datagram_msg(skb, 0, msg, copied);
739 if (err)
740 goto done;
741
742 sock_recv_ts_and_drops(msg, sk, skb);
743
744 if (saddr) {
745 saddr->family = AF_IEEE802154;
746 ieee802154_addr_to_sa(&saddr->addr, &mac_cb(skb)->source);
747 *addr_len = sizeof(*saddr);
748 }
749
750 if (flags & MSG_TRUNC)
751 copied = skb->len;
752 done:
753 skb_free_datagram(sk, skb);
754 out:
755 if (err)
756 return err;
757 return copied;
758 }
759
760 static int dgram_rcv_skb(struct sock *sk, struct sk_buff *skb)
761 {
762 skb = skb_share_check(skb, GFP_ATOMIC);
763 if (!skb)
764 return NET_RX_DROP;
765
766 if (sock_queue_rcv_skb(sk, skb) < 0) {
767 kfree_skb(skb);
768 return NET_RX_DROP;
769 }
770
771 return NET_RX_SUCCESS;
772 }
773
774 static inline bool
775 ieee802154_match_sock(__le64 hw_addr, __le16 pan_id, __le16 short_addr,
776 struct dgram_sock *ro)
777 {
778 if (!ro->bound)
779 return true;
780
781 if (ro->src_addr.mode == IEEE802154_ADDR_LONG &&
782 hw_addr == ro->src_addr.extended_addr)
783 return true;
784
785 if (ro->src_addr.mode == IEEE802154_ADDR_SHORT &&
786 pan_id == ro->src_addr.pan_id &&
787 short_addr == ro->src_addr.short_addr)
788 return true;
789
790 return false;
791 }
792
793 static int ieee802154_dgram_deliver(struct net_device *dev, struct sk_buff *skb)
794 {
795 struct sock *sk, *prev = NULL;
796 int ret = NET_RX_SUCCESS;
797 __le16 pan_id, short_addr;
798 __le64 hw_addr;
799
800 /* Data frame processing */
801 BUG_ON(dev->type != ARPHRD_IEEE802154);
802
803 pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
804 short_addr = ieee802154_mlme_ops(dev)->get_short_addr(dev);
805 hw_addr = ieee802154_devaddr_from_raw(dev->dev_addr);
806
807 read_lock(&dgram_lock);
808 sk_for_each(sk, &dgram_head) {
809 if (ieee802154_match_sock(hw_addr, pan_id, short_addr,
810 dgram_sk(sk))) {
811 if (prev) {
812 struct sk_buff *clone;
813
814 clone = skb_clone(skb, GFP_ATOMIC);
815 if (clone)
816 dgram_rcv_skb(prev, clone);
817 }
818
819 prev = sk;
820 }
821 }
822
823 if (prev) {
824 dgram_rcv_skb(prev, skb);
825 } else {
826 kfree_skb(skb);
827 ret = NET_RX_DROP;
828 }
829 read_unlock(&dgram_lock);
830
831 return ret;
832 }
833
834 static int dgram_getsockopt(struct sock *sk, int level, int optname,
835 char __user *optval, int __user *optlen)
836 {
837 struct dgram_sock *ro = dgram_sk(sk);
838
839 int val, len;
840
841 if (level != SOL_IEEE802154)
842 return -EOPNOTSUPP;
843
844 if (get_user(len, optlen))
845 return -EFAULT;
846
847 len = min_t(unsigned int, len, sizeof(int));
848
849 switch (optname) {
850 case WPAN_WANTACK:
851 val = ro->want_ack;
852 break;
853 case WPAN_SECURITY:
854 if (!ro->secen_override)
855 val = WPAN_SECURITY_DEFAULT;
856 else if (ro->secen)
857 val = WPAN_SECURITY_ON;
858 else
859 val = WPAN_SECURITY_OFF;
860 break;
861 case WPAN_SECURITY_LEVEL:
862 if (!ro->seclevel_override)
863 val = WPAN_SECURITY_LEVEL_DEFAULT;
864 else
865 val = ro->seclevel;
866 break;
867 default:
868 return -ENOPROTOOPT;
869 }
870
871 if (put_user(len, optlen))
872 return -EFAULT;
873 if (copy_to_user(optval, &val, len))
874 return -EFAULT;
875 return 0;
876 }
877
878 static int dgram_setsockopt(struct sock *sk, int level, int optname,
879 char __user *optval, unsigned int optlen)
880 {
881 struct dgram_sock *ro = dgram_sk(sk);
882 struct net *net = sock_net(sk);
883 int val;
884 int err = 0;
885
886 if (optlen < sizeof(int))
887 return -EINVAL;
888
889 if (get_user(val, (int __user *)optval))
890 return -EFAULT;
891
892 lock_sock(sk);
893
894 switch (optname) {
895 case WPAN_WANTACK:
896 ro->want_ack = !!val;
897 break;
898 case WPAN_SECURITY:
899 if (!ns_capable(net->user_ns, CAP_NET_ADMIN) &&
900 !ns_capable(net->user_ns, CAP_NET_RAW)) {
901 err = -EPERM;
902 break;
903 }
904
905 switch (val) {
906 case WPAN_SECURITY_DEFAULT:
907 ro->secen_override = 0;
908 break;
909 case WPAN_SECURITY_ON:
910 ro->secen_override = 1;
911 ro->secen = 1;
912 break;
913 case WPAN_SECURITY_OFF:
914 ro->secen_override = 1;
915 ro->secen = 0;
916 break;
917 default:
918 err = -EINVAL;
919 break;
920 }
921 break;
922 case WPAN_SECURITY_LEVEL:
923 if (!ns_capable(net->user_ns, CAP_NET_ADMIN) &&
924 !ns_capable(net->user_ns, CAP_NET_RAW)) {
925 err = -EPERM;
926 break;
927 }
928
929 if (val < WPAN_SECURITY_LEVEL_DEFAULT ||
930 val > IEEE802154_SCF_SECLEVEL_ENC_MIC128) {
931 err = -EINVAL;
932 } else if (val == WPAN_SECURITY_LEVEL_DEFAULT) {
933 ro->seclevel_override = 0;
934 } else {
935 ro->seclevel_override = 1;
936 ro->seclevel = val;
937 }
938 break;
939 default:
940 err = -ENOPROTOOPT;
941 break;
942 }
943
944 release_sock(sk);
945 return err;
946 }
947
948 static struct proto ieee802154_dgram_prot = {
949 .name = "IEEE-802.15.4-MAC",
950 .owner = THIS_MODULE,
951 .obj_size = sizeof(struct dgram_sock),
952 .init = dgram_init,
953 .close = dgram_close,
954 .bind = dgram_bind,
955 .sendmsg = dgram_sendmsg,
956 .recvmsg = dgram_recvmsg,
957 .hash = dgram_hash,
958 .unhash = dgram_unhash,
959 .connect = dgram_connect,
960 .disconnect = dgram_disconnect,
961 .ioctl = dgram_ioctl,
962 .getsockopt = dgram_getsockopt,
963 .setsockopt = dgram_setsockopt,
964 };
965
966 static const struct proto_ops ieee802154_dgram_ops = {
967 .family = PF_IEEE802154,
968 .owner = THIS_MODULE,
969 .release = ieee802154_sock_release,
970 .bind = ieee802154_sock_bind,
971 .connect = ieee802154_sock_connect,
972 .socketpair = sock_no_socketpair,
973 .accept = sock_no_accept,
974 .getname = sock_no_getname,
975 .poll = datagram_poll,
976 .ioctl = ieee802154_sock_ioctl,
977 .listen = sock_no_listen,
978 .shutdown = sock_no_shutdown,
979 .setsockopt = sock_common_setsockopt,
980 .getsockopt = sock_common_getsockopt,
981 .sendmsg = ieee802154_sock_sendmsg,
982 .recvmsg = sock_common_recvmsg,
983 .mmap = sock_no_mmap,
984 .sendpage = sock_no_sendpage,
985 #ifdef CONFIG_COMPAT
986 .compat_setsockopt = compat_sock_common_setsockopt,
987 .compat_getsockopt = compat_sock_common_getsockopt,
988 #endif
989 };
990
991 /* Create a socket. Initialise the socket, blank the addresses
992 * set the state.
993 */
994 static int ieee802154_create(struct net *net, struct socket *sock,
995 int protocol, int kern)
996 {
997 struct sock *sk;
998 int rc;
999 struct proto *proto;
1000 const struct proto_ops *ops;
1001
1002 if (!net_eq(net, &init_net))
1003 return -EAFNOSUPPORT;
1004
1005 switch (sock->type) {
1006 case SOCK_RAW:
1007 proto = &ieee802154_raw_prot;
1008 ops = &ieee802154_raw_ops;
1009 break;
1010 case SOCK_DGRAM:
1011 proto = &ieee802154_dgram_prot;
1012 ops = &ieee802154_dgram_ops;
1013 break;
1014 default:
1015 rc = -ESOCKTNOSUPPORT;
1016 goto out;
1017 }
1018
1019 rc = -ENOMEM;
1020 sk = sk_alloc(net, PF_IEEE802154, GFP_KERNEL, proto);
1021 if (!sk)
1022 goto out;
1023 rc = 0;
1024
1025 sock->ops = ops;
1026
1027 sock_init_data(sock, sk);
1028 /* FIXME: sk->sk_destruct */
1029 sk->sk_family = PF_IEEE802154;
1030
1031 /* Checksums on by default */
1032 sock_set_flag(sk, SOCK_ZAPPED);
1033
1034 if (sk->sk_prot->hash)
1035 sk->sk_prot->hash(sk);
1036
1037 if (sk->sk_prot->init) {
1038 rc = sk->sk_prot->init(sk);
1039 if (rc)
1040 sk_common_release(sk);
1041 }
1042 out:
1043 return rc;
1044 }
1045
1046 static const struct net_proto_family ieee802154_family_ops = {
1047 .family = PF_IEEE802154,
1048 .create = ieee802154_create,
1049 .owner = THIS_MODULE,
1050 };
1051
1052 static int ieee802154_rcv(struct sk_buff *skb, struct net_device *dev,
1053 struct packet_type *pt, struct net_device *orig_dev)
1054 {
1055 if (!netif_running(dev))
1056 goto drop;
1057 pr_debug("got frame, type %d, dev %p\n", dev->type, dev);
1058 #ifdef DEBUG
1059 print_hex_dump_bytes("ieee802154_rcv ",
1060 DUMP_PREFIX_NONE, skb->data, skb->len);
1061 #endif
1062
1063 if (!net_eq(dev_net(dev), &init_net))
1064 goto drop;
1065
1066 ieee802154_raw_deliver(dev, skb);
1067
1068 if (dev->type != ARPHRD_IEEE802154)
1069 goto drop;
1070
1071 if (skb->pkt_type != PACKET_OTHERHOST)
1072 return ieee802154_dgram_deliver(dev, skb);
1073
1074 drop:
1075 kfree_skb(skb);
1076 return NET_RX_DROP;
1077 }
1078
1079 static struct packet_type ieee802154_packet_type = {
1080 .type = htons(ETH_P_IEEE802154),
1081 .func = ieee802154_rcv,
1082 };
1083
1084 static int __init af_ieee802154_init(void)
1085 {
1086 int rc = -EINVAL;
1087
1088 rc = proto_register(&ieee802154_raw_prot, 1);
1089 if (rc)
1090 goto out;
1091
1092 rc = proto_register(&ieee802154_dgram_prot, 1);
1093 if (rc)
1094 goto err_dgram;
1095
1096 /* Tell SOCKET that we are alive */
1097 rc = sock_register(&ieee802154_family_ops);
1098 if (rc)
1099 goto err_sock;
1100 dev_add_pack(&ieee802154_packet_type);
1101
1102 rc = 0;
1103 goto out;
1104
1105 err_sock:
1106 proto_unregister(&ieee802154_dgram_prot);
1107 err_dgram:
1108 proto_unregister(&ieee802154_raw_prot);
1109 out:
1110 return rc;
1111 }
1112
1113 static void __exit af_ieee802154_remove(void)
1114 {
1115 dev_remove_pack(&ieee802154_packet_type);
1116 sock_unregister(PF_IEEE802154);
1117 proto_unregister(&ieee802154_dgram_prot);
1118 proto_unregister(&ieee802154_raw_prot);
1119 }
1120
1121 module_init(af_ieee802154_init);
1122 module_exit(af_ieee802154_remove);
1123
1124 MODULE_LICENSE("GPL");
1125 MODULE_ALIAS_NETPROTO(PF_IEEE802154);
Linux kernel - Deliverables
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