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Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
[linux-2.6-block.git] / net / ieee802154 / socket.c
CommitLineData
9ec76716
SL		 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 *
9ec76716
SL		 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>
5a0e3ad6 27#include <linux/slab.h>
811e299f 28#include <linux/socket.h>
9ec76716
SL		 29#include <net/datalink.h>
30#include <net/psnap.h>
31#include <net/sock.h>
32#include <net/tcp_states.h>
33#include <net/route.h>
34
f0166e5e
DES		 35#include <net/af_ieee802154.h>
36#include <net/ieee802154_netdev.h>
9ec76716 37
4710d806 38/* Utility function for families */
78f821b6 39static struct net_device*
e6278d92 40ieee802154_get_dev(struct net *net, const struct ieee802154_addr *addr)
9ec76716
SL		 41{
42 struct net_device *dev = NULL;
43 struct net_device *tmp;
b70ab2e8 44 __le16 pan_id, short_addr;
e6278d92 45 u8 hwaddr[IEEE802154_ADDR_LEN];
9ec76716 46
e6278d92 47 switch (addr->mode) {
9ec76716 48 case IEEE802154_ADDR_LONG:
e6278d92 49 ieee802154_devaddr_to_raw(hwaddr, addr->extended_addr);
941666c2 50 rcu_read_lock();
e6278d92 51 dev = dev_getbyhwaddr_rcu(net, ARPHRD_IEEE802154, hwaddr);
9ec76716
SL		 52 if (dev)
53 dev_hold(dev);
941666c2 54 rcu_read_unlock();
9ec76716
SL		 55 break;
56 case IEEE802154_ADDR_SHORT:
e6278d92
PB		 57 if (addr->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST) ||
58 addr->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) ||
06324f2f 59 addr->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST))
9ec76716
SL		 60 break;
61
62 rtnl_lock();
63
64 for_each_netdev(net, tmp) {
65 if (tmp->type != ARPHRD_IEEE802154)
66 continue;
67
c947f7e1
AA		 68 pan_id = tmp->ieee802154_ptr->pan_id;
69 short_addr = tmp->ieee802154_ptr->short_addr;
e6278d92
PB		 70 if (pan_id == addr->pan_id &&
71 short_addr == addr->short_addr) {
9ec76716
SL		 72 dev = tmp;
73 dev_hold(dev);
74 break;
75 }
76 }
77
78 rtnl_unlock();
79 break;
80 default:
4710d806
VB		 81 pr_warn("Unsupported ieee802154 address type: %d\n",
82 addr->mode);
9ec76716
SL		 83 break;
84 }
85
86 return dev;
87}
88
89static int ieee802154_sock_release(struct socket *sock)
90{
91 struct sock *sk = sock->sk;
92
93 if (sk) {
94 sock->sk = NULL;
95 sk->sk_prot->close(sk, 0);
96 }
97 return 0;
98}
6c10dc05 99
1b784140
YX		 100static int ieee802154_sock_sendmsg(struct socket *sock, struct msghdr *msg,
101 size_t len)
9ec76716
SL		 102{
103 struct sock *sk = sock->sk;
104
1b784140 105 return sk->sk_prot->sendmsg(sk, msg, len);
9ec76716
SL		 106}
107
108static int ieee802154_sock_bind(struct socket *sock, struct sockaddr *uaddr,
4710d806 109 int addr_len)
9ec76716
SL		 110{
111 struct sock *sk = sock->sk;
112
113 if (sk->sk_prot->bind)
114 return sk->sk_prot->bind(sk, uaddr, addr_len);
115
116 return sock_no_bind(sock, uaddr, addr_len);
117}
118
119static int ieee802154_sock_connect(struct socket *sock, struct sockaddr *uaddr,
4710d806 120 int addr_len, int flags)
9ec76716
SL		 121{
122 struct sock *sk = sock->sk;
123
6503d961
CG		 124 if (addr_len < sizeof(uaddr->sa_family))
125 return -EINVAL;
126
9ec76716
SL		 127 if (uaddr->sa_family == AF_UNSPEC)
128 return sk->sk_prot->disconnect(sk, flags);
129
130 return sk->sk_prot->connect(sk, uaddr, addr_len);
131}
132
133static int ieee802154_dev_ioctl(struct sock *sk, struct ifreq __user *arg,
4710d806 134 unsigned int cmd)
9ec76716
SL		 135{
136 struct ifreq ifr;
45a41d14 137 int ret = -ENOIOCTLCMD;
9ec76716
SL		 138 struct net_device *dev;
139
140 if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
141 return -EFAULT;
142
143 ifr.ifr_name[IFNAMSIZ-1] = 0;
144
145 dev_load(sock_net(sk), ifr.ifr_name);
146 dev = dev_get_by_name(sock_net(sk), ifr.ifr_name);
45a41d14 147
93c0c8b4
SS		 148 if (!dev)
149 return -ENODEV;
150
929122cd 151 if (dev->type == ARPHRD_IEEE802154 && dev->netdev_ops->ndo_do_ioctl)
9ec76716
SL		 152 ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, cmd);
153
154 if (!ret && copy_to_user(arg, &ifr, sizeof(struct ifreq)))
155 ret = -EFAULT;
156 dev_put(dev);
157
158 return ret;
159}
160
161static int ieee802154_sock_ioctl(struct socket *sock, unsigned int cmd,
4710d806 162 unsigned long arg)
9ec76716
SL		 163{
164 struct sock *sk = sock->sk;
165
166 switch (cmd) {
167 case SIOCGSTAMP:
168 return sock_get_timestamp(sk, (struct timeval __user *)arg);
169 case SIOCGSTAMPNS:
170 return sock_get_timestampns(sk, (struct timespec __user *)arg);
171 case SIOCGIFADDR:
172 case SIOCSIFADDR:
173 return ieee802154_dev_ioctl(sk, (struct ifreq __user *)arg,
174 cmd);
175 default:
176 if (!sk->sk_prot->ioctl)
177 return -ENOIOCTLCMD;
178 return sk->sk_prot->ioctl(sk, cmd, arg);
179 }
180}
181
78f821b6
AA		 182/* RAW Sockets (802.15.4 created in userspace) */
183static HLIST_HEAD(raw_head);
184static DEFINE_RWLOCK(raw_lock);
185
086c653f 186static int raw_hash(struct sock *sk)
78f821b6
AA		 187{
188 write_lock_bh(&raw_lock);
189 sk_add_node(sk, &raw_head);
190 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
191 write_unlock_bh(&raw_lock);
086c653f
CG		 192
193 return 0;
78f821b6
AA		 194}
195
196static void raw_unhash(struct sock *sk)
197{
198 write_lock_bh(&raw_lock);
199 if (sk_del_node_init(sk))
200 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
201 write_unlock_bh(&raw_lock);
202}
203
204static void raw_close(struct sock *sk, long timeout)
205{
206 sk_common_release(sk);
207}
208
209static int raw_bind(struct sock *sk, struct sockaddr *_uaddr, int len)
210{
211 struct ieee802154_addr addr;
212 struct sockaddr_ieee802154 *uaddr = (struct sockaddr_ieee802154 *)_uaddr;
213 int err = 0;
214 struct net_device *dev = NULL;
215
216 if (len < sizeof(*uaddr))
217 return -EINVAL;
218
219 uaddr = (struct sockaddr_ieee802154 *)_uaddr;
220 if (uaddr->family != AF_IEEE802154)
221 return -EINVAL;
222
223 lock_sock(sk);
224
225 ieee802154_addr_from_sa(&addr, &uaddr->addr);
226 dev = ieee802154_get_dev(sock_net(sk), &addr);
227 if (!dev) {
228 err = -ENODEV;
229 goto out;
230 }
231
78f821b6
AA		 232 sk->sk_bound_dev_if = dev->ifindex;
233 sk_dst_reset(sk);
234
78f821b6
AA		 235 dev_put(dev);
236out:
237 release_sock(sk);
238
239 return err;
240}
241
242static int raw_connect(struct sock *sk, struct sockaddr *uaddr,
243 int addr_len)
244{
245 return -ENOTSUPP;
246}
247
248static int raw_disconnect(struct sock *sk, int flags)
249{
250 return 0;
251}
252
1b784140 253static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
78f821b6
AA		 254{
255 struct net_device *dev;
256 unsigned int mtu;
257 struct sk_buff *skb;
258 int hlen, tlen;
259 int err;
260
261 if (msg->msg_flags & MSG_OOB) {
262 pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags);
263 return -EOPNOTSUPP;
264 }
265
266 lock_sock(sk);
267 if (!sk->sk_bound_dev_if)
268 dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
269 else
270 dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if);
271 release_sock(sk);
272
273 if (!dev) {
274 pr_debug("no dev\n");
275 err = -ENXIO;
276 goto out;
277 }
278
b40988c4 279 mtu = IEEE802154_MTU;
78f821b6
AA		 280 pr_debug("name = %s, mtu = %u\n", dev->name, mtu);
281
282 if (size > mtu) {
5b5e0928 283 pr_debug("size = %zu, mtu = %u\n", size, mtu);
c032705e 284 err = -EMSGSIZE;
78f821b6
AA		 285 goto out_dev;
286 }
287
288 hlen = LL_RESERVED_SPACE(dev);
289 tlen = dev->needed_tailroom;
290 skb = sock_alloc_send_skb(sk, hlen + tlen + size,
291 msg->msg_flags & MSG_DONTWAIT, &err);
292 if (!skb)
293 goto out_dev;
294
295 skb_reserve(skb, hlen);
296
297 skb_reset_mac_header(skb);
298 skb_reset_network_header(skb);
299
300 err = memcpy_from_msg(skb_put(skb, size), msg, size);
301 if (err < 0)
302 goto out_skb;
303
304 skb->dev = dev;
78f821b6
AA		 305 skb->protocol = htons(ETH_P_IEEE802154);
306
78f821b6
AA		 307 err = dev_queue_xmit(skb);
308 if (err > 0)
309 err = net_xmit_errno(err);
310
a611c58b
LZ		 311 dev_put(dev);
312
78f821b6
AA		 313 return err ?: size;
314
315out_skb:
316 kfree_skb(skb);
317out_dev:
318 dev_put(dev);
319out:
320 return err;
321}
322
1b784140
YX		 323static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
324 int noblock, int flags, int *addr_len)
78f821b6
AA		 325{
326 size_t copied = 0;
327 int err = -EOPNOTSUPP;
328 struct sk_buff *skb;
329
330 skb = skb_recv_datagram(sk, flags, noblock, &err);
331 if (!skb)
332 goto out;
333
334 copied = skb->len;
335 if (len < copied) {
336 msg->msg_flags |= MSG_TRUNC;
337 copied = len;
338 }
339
340 err = skb_copy_datagram_msg(skb, 0, msg, copied);
341 if (err)
342 goto done;
343
344 sock_recv_ts_and_drops(msg, sk, skb);
345
346 if (flags & MSG_TRUNC)
347 copied = skb->len;
348done:
349 skb_free_datagram(sk, skb);
350out:
351 if (err)
352 return err;
353 return copied;
354}
355
356static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb)
357{
358 skb = skb_share_check(skb, GFP_ATOMIC);
359 if (!skb)
360 return NET_RX_DROP;
361
362 if (sock_queue_rcv_skb(sk, skb) < 0) {
363 kfree_skb(skb);
364 return NET_RX_DROP;
365 }
366
367 return NET_RX_SUCCESS;
368}
369
370static void ieee802154_raw_deliver(struct net_device *dev, struct sk_buff *skb)
371{
372 struct sock *sk;
373
374 read_lock(&raw_lock);
375 sk_for_each(sk, &raw_head) {
376 bh_lock_sock(sk);
377 if (!sk->sk_bound_dev_if ||
378 sk->sk_bound_dev_if == dev->ifindex) {
379 struct sk_buff *clone;
380
381 clone = skb_clone(skb, GFP_ATOMIC);
382 if (clone)
383 raw_rcv_skb(sk, clone);
384 }
385 bh_unlock_sock(sk);
386 }
387 read_unlock(&raw_lock);
388}
389
390static int raw_getsockopt(struct sock *sk, int level, int optname,
391 char __user *optval, int __user *optlen)
392{
393 return -EOPNOTSUPP;
394}
395
396static int raw_setsockopt(struct sock *sk, int level, int optname,
397 char __user *optval, unsigned int optlen)
398{
399 return -EOPNOTSUPP;
400}
401
402static struct proto ieee802154_raw_prot = {
403 .name = "IEEE-802.15.4-RAW",
404 .owner = THIS_MODULE,
405 .obj_size = sizeof(struct sock),
406 .close = raw_close,
407 .bind = raw_bind,
408 .sendmsg = raw_sendmsg,
409 .recvmsg = raw_recvmsg,
410 .hash = raw_hash,
411 .unhash = raw_unhash,
412 .connect = raw_connect,
413 .disconnect = raw_disconnect,
414 .getsockopt = raw_getsockopt,
415 .setsockopt = raw_setsockopt,
416};
417
9ec76716
SL		 418static const struct proto_ops ieee802154_raw_ops = {
419 .family = PF_IEEE802154,
420 .owner = THIS_MODULE,
421 .release = ieee802154_sock_release,
422 .bind = ieee802154_sock_bind,
423 .connect = ieee802154_sock_connect,
424 .socketpair = sock_no_socketpair,
425 .accept = sock_no_accept,
426 .getname = sock_no_getname,
a11e1d43 427 .poll = datagram_poll,
9ec76716
SL		 428 .ioctl = ieee802154_sock_ioctl,
429 .listen = sock_no_listen,
430 .shutdown = sock_no_shutdown,
431 .setsockopt = sock_common_setsockopt,
432 .getsockopt = sock_common_getsockopt,
433 .sendmsg = ieee802154_sock_sendmsg,
434 .recvmsg = sock_common_recvmsg,
435 .mmap = sock_no_mmap,
436 .sendpage = sock_no_sendpage,
437#ifdef CONFIG_COMPAT
438 .compat_setsockopt = compat_sock_common_setsockopt,
439 .compat_getsockopt = compat_sock_common_getsockopt,
440#endif
441};
442
78f821b6
AA		 443/* DGRAM Sockets (802.15.4 dataframes) */
444static HLIST_HEAD(dgram_head);
445static DEFINE_RWLOCK(dgram_lock);
446
447struct dgram_sock {
448 struct sock sk;
449
450 struct ieee802154_addr src_addr;
451 struct ieee802154_addr dst_addr;
452
453 unsigned int bound:1;
454 unsigned int connected:1;
455 unsigned int want_ack:1;
811e299f 456 unsigned int want_lqi:1;
78f821b6
AA		 457 unsigned int secen:1;
458 unsigned int secen_override:1;
459 unsigned int seclevel:3;
460 unsigned int seclevel_override:1;
461};
462
463static inline struct dgram_sock *dgram_sk(const struct sock *sk)
464{
465 return container_of(sk, struct dgram_sock, sk);
466}
467
086c653f 468static int dgram_hash(struct sock *sk)
78f821b6
AA		 469{
470 write_lock_bh(&dgram_lock);
471 sk_add_node(sk, &dgram_head);
472 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
473 write_unlock_bh(&dgram_lock);
086c653f
CG		 474
475 return 0;
78f821b6
AA		 476}
477
478static void dgram_unhash(struct sock *sk)
479{
480 write_lock_bh(&dgram_lock);
481 if (sk_del_node_init(sk))
482 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
483 write_unlock_bh(&dgram_lock);
484}
485
486static int dgram_init(struct sock *sk)
487{
488 struct dgram_sock *ro = dgram_sk(sk);
489
490 ro->want_ack = 1;
811e299f 491 ro->want_lqi = 0;
78f821b6
AA		 492 return 0;
493}
494
495static void dgram_close(struct sock *sk, long timeout)
496{
497 sk_common_release(sk);
498}
499
500static int dgram_bind(struct sock *sk, struct sockaddr *uaddr, int len)
501{
502 struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr;
503 struct ieee802154_addr haddr;
504 struct dgram_sock *ro = dgram_sk(sk);
505 int err = -EINVAL;
506 struct net_device *dev;
507
508 lock_sock(sk);
509
510 ro->bound = 0;
511
512 if (len < sizeof(*addr))
513 goto out;
514
515 if (addr->family != AF_IEEE802154)
516 goto out;
517
518 ieee802154_addr_from_sa(&haddr, &addr->addr);
519 dev = ieee802154_get_dev(sock_net(sk), &haddr);
520 if (!dev) {
521 err = -ENODEV;
522 goto out;
523 }
524
525 if (dev->type != ARPHRD_IEEE802154) {
526 err = -ENODEV;
527 goto out_put;
528 }
529
530 ro->src_addr = haddr;
531
532 ro->bound = 1;
533 err = 0;
534out_put:
535 dev_put(dev);
536out:
537 release_sock(sk);
538
539 return err;
540}
541
542static int dgram_ioctl(struct sock *sk, int cmd, unsigned long arg)
543{
544 switch (cmd) {
545 case SIOCOUTQ:
546 {
547 int amount = sk_wmem_alloc_get(sk);
548
549 return put_user(amount, (int __user *)arg);
550 }
551
552 case SIOCINQ:
553 {
554 struct sk_buff *skb;
555 unsigned long amount;
556
557 amount = 0;
558 spin_lock_bh(&sk->sk_receive_queue.lock);
559 skb = skb_peek(&sk->sk_receive_queue);
df2f65de 560 if (skb) {
78f821b6
AA		 561 /* We will only return the amount
562 * of this packet since that is all
563 * that will be read.
564 */
565 amount = skb->len - ieee802154_hdr_length(skb);
566 }
567 spin_unlock_bh(&sk->sk_receive_queue.lock);
568 return put_user(amount, (int __user *)arg);
569 }
570 }
571
572 return -ENOIOCTLCMD;
573}
574
575/* FIXME: autobind */
576static int dgram_connect(struct sock *sk, struct sockaddr *uaddr,
577 int len)
578{
579 struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr;
580 struct dgram_sock *ro = dgram_sk(sk);
581 int err = 0;
582
583 if (len < sizeof(*addr))
584 return -EINVAL;
585
586 if (addr->family != AF_IEEE802154)
587 return -EINVAL;
588
589 lock_sock(sk);
590
591 if (!ro->bound) {
592 err = -ENETUNREACH;
593 goto out;
594 }
595
596 ieee802154_addr_from_sa(&ro->dst_addr, &addr->addr);
597 ro->connected = 1;
598
599out:
600 release_sock(sk);
601 return err;
602}
603
604static int dgram_disconnect(struct sock *sk, int flags)
605{
606 struct dgram_sock *ro = dgram_sk(sk);
607
608 lock_sock(sk);
609 ro->connected = 0;
610 release_sock(sk);
611
612 return 0;
613}
614
1b784140 615static int dgram_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
78f821b6
AA		 616{
617 struct net_device *dev;
618 unsigned int mtu;
619 struct sk_buff *skb;
620 struct ieee802154_mac_cb *cb;
621 struct dgram_sock *ro = dgram_sk(sk);
622 struct ieee802154_addr dst_addr;
623 int hlen, tlen;
624 int err;
625
626 if (msg->msg_flags & MSG_OOB) {
627 pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags);
628 return -EOPNOTSUPP;
629 }
630
631 if (!ro->connected && !msg->msg_name)
632 return -EDESTADDRREQ;
633 else if (ro->connected && msg->msg_name)
634 return -EISCONN;
635
636 if (!ro->bound)
637 dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
638 else
639 dev = ieee802154_get_dev(sock_net(sk), &ro->src_addr);
640
641 if (!dev) {
642 pr_debug("no dev\n");
643 err = -ENXIO;
644 goto out;
645 }
b40988c4 646 mtu = IEEE802154_MTU;
78f821b6
AA		 647 pr_debug("name = %s, mtu = %u\n", dev->name, mtu);
648
649 if (size > mtu) {
5b5e0928 650 pr_debug("size = %zu, mtu = %u\n", size, mtu);
78f821b6
AA		 651 err = -EMSGSIZE;
652 goto out_dev;
653 }
654
655 hlen = LL_RESERVED_SPACE(dev);
656 tlen = dev->needed_tailroom;
657 skb = sock_alloc_send_skb(sk, hlen + tlen + size,
658 msg->msg_flags & MSG_DONTWAIT,
659 &err);
660 if (!skb)
661 goto out_dev;
662
663 skb_reserve(skb, hlen);
664
665 skb_reset_network_header(skb);
666
667 cb = mac_cb_init(skb);
668 cb->type = IEEE802154_FC_TYPE_DATA;
669 cb->ackreq = ro->want_ack;
670
671 if (msg->msg_name) {
672 DECLARE_SOCKADDR(struct sockaddr_ieee802154*,
673 daddr, msg->msg_name);
674
675 ieee802154_addr_from_sa(&dst_addr, &daddr->addr);
676 } else {
677 dst_addr = ro->dst_addr;
678 }
679
680 cb->secen = ro->secen;
681 cb->secen_override = ro->secen_override;
682 cb->seclevel = ro->seclevel;
683 cb->seclevel_override = ro->seclevel_override;
684
838b83d6
AA		 685 err = wpan_dev_hard_header(skb, dev, &dst_addr,
686 ro->bound ? &ro->src_addr : NULL, size);
78f821b6
AA		 687 if (err < 0)
688 goto out_skb;
689
690 err = memcpy_from_msg(skb_put(skb, size), msg, size);
691 if (err < 0)
692 goto out_skb;
693
694 skb->dev = dev;
78f821b6
AA		 695 skb->protocol = htons(ETH_P_IEEE802154);
696
78f821b6
AA		 697 err = dev_queue_xmit(skb);
698 if (err > 0)
699 err = net_xmit_errno(err);
700
a611c58b
LZ		 701 dev_put(dev);
702
78f821b6
AA		 703 return err ?: size;
704
705out_skb:
706 kfree_skb(skb);
707out_dev:
708 dev_put(dev);
709out:
710 return err;
711}
712
1b784140
YX		 713static int dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
714 int noblock, int flags, int *addr_len)
78f821b6
AA		 715{
716 size_t copied = 0;
717 int err = -EOPNOTSUPP;
718 struct sk_buff *skb;
811e299f 719 struct dgram_sock *ro = dgram_sk(sk);
78f821b6
AA		 720 DECLARE_SOCKADDR(struct sockaddr_ieee802154 *, saddr, msg->msg_name);
721
722 skb = skb_recv_datagram(sk, flags, noblock, &err);
723 if (!skb)
724 goto out;
725
726 copied = skb->len;
727 if (len < copied) {
728 msg->msg_flags |= MSG_TRUNC;
729 copied = len;
730 }
731
732 /* FIXME: skip headers if necessary ?! */
733 err = skb_copy_datagram_msg(skb, 0, msg, copied);
734 if (err)
735 goto done;
736
737 sock_recv_ts_and_drops(msg, sk, skb);
738
739 if (saddr) {
8a70cefa
LB		 740 /* Clear the implicit padding in struct sockaddr_ieee802154
741 * (16 bits between 'family' and 'addr') and in struct
742 * ieee802154_addr_sa (16 bits at the end of the structure).
743 */
744 memset(saddr, 0, sizeof(*saddr));
745
78f821b6
AA		 746 saddr->family = AF_IEEE802154;
747 ieee802154_addr_to_sa(&saddr->addr, &mac_cb(skb)->source);
748 *addr_len = sizeof(*saddr);
749 }
750
811e299f
RC		 751 if (ro->want_lqi) {
752 err = put_cmsg(msg, SOL_IEEE802154, WPAN_WANTLQI,
753 sizeof(uint8_t), &(mac_cb(skb)->lqi));
754 if (err)
755 goto done;
756 }
757
78f821b6
AA		 758 if (flags & MSG_TRUNC)
759 copied = skb->len;
760done:
761 skb_free_datagram(sk, skb);
762out:
763 if (err)
764 return err;
765 return copied;
766}
767
768static int dgram_rcv_skb(struct sock *sk, struct sk_buff *skb)
769{
770 skb = skb_share_check(skb, GFP_ATOMIC);
771 if (!skb)
772 return NET_RX_DROP;
773
774 if (sock_queue_rcv_skb(sk, skb) < 0) {
775 kfree_skb(skb);
776 return NET_RX_DROP;
777 }
778
779 return NET_RX_SUCCESS;
780}
781
782static inline bool
783ieee802154_match_sock(__le64 hw_addr, __le16 pan_id, __le16 short_addr,
784 struct dgram_sock *ro)
785{
786 if (!ro->bound)
787 return true;
788
789 if (ro->src_addr.mode == IEEE802154_ADDR_LONG &&
790 hw_addr == ro->src_addr.extended_addr)
791 return true;
792
793 if (ro->src_addr.mode == IEEE802154_ADDR_SHORT &&
794 pan_id == ro->src_addr.pan_id &&
795 short_addr == ro->src_addr.short_addr)
796 return true;
797
798 return false;
799}
800
801static int ieee802154_dgram_deliver(struct net_device *dev, struct sk_buff *skb)
802{
803 struct sock *sk, *prev = NULL;
804 int ret = NET_RX_SUCCESS;
805 __le16 pan_id, short_addr;
806 __le64 hw_addr;
807
808 /* Data frame processing */
809 BUG_ON(dev->type != ARPHRD_IEEE802154);
810
c947f7e1
AA		 811 pan_id = dev->ieee802154_ptr->pan_id;
812 short_addr = dev->ieee802154_ptr->short_addr;
813 hw_addr = dev->ieee802154_ptr->extended_addr;
78f821b6
AA		 814
815 read_lock(&dgram_lock);
816 sk_for_each(sk, &dgram_head) {
817 if (ieee802154_match_sock(hw_addr, pan_id, short_addr,
818 dgram_sk(sk))) {
819 if (prev) {
820 struct sk_buff *clone;
821
822 clone = skb_clone(skb, GFP_ATOMIC);
823 if (clone)
824 dgram_rcv_skb(prev, clone);
825 }
826
827 prev = sk;
828 }
829 }
830
831 if (prev) {
832 dgram_rcv_skb(prev, skb);
833 } else {
834 kfree_skb(skb);
835 ret = NET_RX_DROP;
836 }
837 read_unlock(&dgram_lock);
838
839 return ret;
840}
841
842static int dgram_getsockopt(struct sock *sk, int level, int optname,
843 char __user *optval, int __user *optlen)
844{
845 struct dgram_sock *ro = dgram_sk(sk);
846
847 int val, len;
848
849 if (level != SOL_IEEE802154)
850 return -EOPNOTSUPP;
851
852 if (get_user(len, optlen))
853 return -EFAULT;
854
855 len = min_t(unsigned int, len, sizeof(int));
856
857 switch (optname) {
858 case WPAN_WANTACK:
859 val = ro->want_ack;
860 break;
811e299f
RC		 861 case WPAN_WANTLQI:
862 val = ro->want_lqi;
863 break;
78f821b6
AA		 864 case WPAN_SECURITY:
865 if (!ro->secen_override)
866 val = WPAN_SECURITY_DEFAULT;
867 else if (ro->secen)
868 val = WPAN_SECURITY_ON;
869 else
870 val = WPAN_SECURITY_OFF;
871 break;
872 case WPAN_SECURITY_LEVEL:
873 if (!ro->seclevel_override)
874 val = WPAN_SECURITY_LEVEL_DEFAULT;
875 else
876 val = ro->seclevel;
877 break;
878 default:
879 return -ENOPROTOOPT;
880 }
881
882 if (put_user(len, optlen))
883 return -EFAULT;
884 if (copy_to_user(optval, &val, len))
885 return -EFAULT;
886 return 0;
887}
888
889static int dgram_setsockopt(struct sock *sk, int level, int optname,
890 char __user *optval, unsigned int optlen)
891{
892 struct dgram_sock *ro = dgram_sk(sk);
893 struct net *net = sock_net(sk);
894 int val;
895 int err = 0;
896
897 if (optlen < sizeof(int))
898 return -EINVAL;
899
900 if (get_user(val, (int __user *)optval))
901 return -EFAULT;
902
903 lock_sock(sk);
904
905 switch (optname) {
906 case WPAN_WANTACK:
907 ro->want_ack = !!val;
908 break;
811e299f
RC		 909 case WPAN_WANTLQI:
910 ro->want_lqi = !!val;
911 break;
78f821b6
AA		 912 case WPAN_SECURITY:
913 if (!ns_capable(net->user_ns, CAP_NET_ADMIN) &&
914 !ns_capable(net->user_ns, CAP_NET_RAW)) {
915 err = -EPERM;
916 break;
917 }
918
919 switch (val) {
920 case WPAN_SECURITY_DEFAULT:
921 ro->secen_override = 0;
922 break;
923 case WPAN_SECURITY_ON:
924 ro->secen_override = 1;
925 ro->secen = 1;
926 break;
927 case WPAN_SECURITY_OFF:
928 ro->secen_override = 1;
929 ro->secen = 0;
930 break;
931 default:
932 err = -EINVAL;
933 break;
934 }
935 break;
936 case WPAN_SECURITY_LEVEL:
937 if (!ns_capable(net->user_ns, CAP_NET_ADMIN) &&
938 !ns_capable(net->user_ns, CAP_NET_RAW)) {
939 err = -EPERM;
940 break;
941 }
942
943 if (val < WPAN_SECURITY_LEVEL_DEFAULT ||
944 val > IEEE802154_SCF_SECLEVEL_ENC_MIC128) {
945 err = -EINVAL;
946 } else if (val == WPAN_SECURITY_LEVEL_DEFAULT) {
947 ro->seclevel_override = 0;
948 } else {
949 ro->seclevel_override = 1;
950 ro->seclevel = val;
951 }
952 break;
953 default:
954 err = -ENOPROTOOPT;
955 break;
956 }
957
958 release_sock(sk);
959 return err;
960}
961
962static struct proto ieee802154_dgram_prot = {
963 .name = "IEEE-802.15.4-MAC",
964 .owner = THIS_MODULE,
965 .obj_size = sizeof(struct dgram_sock),
966 .init = dgram_init,
967 .close = dgram_close,
968 .bind = dgram_bind,
969 .sendmsg = dgram_sendmsg,
970 .recvmsg = dgram_recvmsg,
971 .hash = dgram_hash,
972 .unhash = dgram_unhash,
973 .connect = dgram_connect,
974 .disconnect = dgram_disconnect,
975 .ioctl = dgram_ioctl,
976 .getsockopt = dgram_getsockopt,
977 .setsockopt = dgram_setsockopt,
978};
979
9ec76716
SL		 980static const struct proto_ops ieee802154_dgram_ops = {
981 .family = PF_IEEE802154,
982 .owner = THIS_MODULE,
983 .release = ieee802154_sock_release,
984 .bind = ieee802154_sock_bind,
985 .connect = ieee802154_sock_connect,
986 .socketpair = sock_no_socketpair,
987 .accept = sock_no_accept,
988 .getname = sock_no_getname,
a11e1d43 989 .poll = datagram_poll,
9ec76716
SL		 990 .ioctl = ieee802154_sock_ioctl,
991 .listen = sock_no_listen,
992 .shutdown = sock_no_shutdown,
993 .setsockopt = sock_common_setsockopt,
994 .getsockopt = sock_common_getsockopt,
995 .sendmsg = ieee802154_sock_sendmsg,
996 .recvmsg = sock_common_recvmsg,
997 .mmap = sock_no_mmap,
998 .sendpage = sock_no_sendpage,
999#ifdef CONFIG_COMPAT
1000 .compat_setsockopt = compat_sock_common_setsockopt,
1001 .compat_getsockopt = compat_sock_common_getsockopt,
1002#endif
1003};
1004
4710d806 1005/* Create a socket. Initialise the socket, blank the addresses
9ec76716
SL		 1006 * set the state.
1007 */
1008static int ieee802154_create(struct net *net, struct socket *sock,
3f378b68 1009 int protocol, int kern)
9ec76716
SL		 1010{
1011 struct sock *sk;
1012 int rc;
1013 struct proto *proto;
1014 const struct proto_ops *ops;
1015
09ad9bc7 1016 if (!net_eq(net, &init_net))
9ec76716
SL		 1017 return -EAFNOSUPPORT;
1018
1019 switch (sock->type) {
1020 case SOCK_RAW:
1021 proto = &ieee802154_raw_prot;
1022 ops = &ieee802154_raw_ops;
1023 break;
1024 case SOCK_DGRAM:
1025 proto = &ieee802154_dgram_prot;
1026 ops = &ieee802154_dgram_ops;
1027 break;
1028 default:
1029 rc = -ESOCKTNOSUPPORT;
1030 goto out;
1031 }
1032
1033 rc = -ENOMEM;
11aa9c28 1034 sk = sk_alloc(net, PF_IEEE802154, GFP_KERNEL, proto, kern);
9ec76716
SL		 1035 if (!sk)
1036 goto out;
1037 rc = 0;
1038
1039 sock->ops = ops;
1040
1041 sock_init_data(sock, sk);
1042 /* FIXME: sk->sk_destruct */
1043 sk->sk_family = PF_IEEE802154;
1044
1045 /* Checksums on by default */
1046 sock_set_flag(sk, SOCK_ZAPPED);
1047
086c653f
CG		 1048 if (sk->sk_prot->hash) {
1049 rc = sk->sk_prot->hash(sk);
1050 if (rc) {
1051 sk_common_release(sk);
1052 goto out;
1053 }
1054 }
9ec76716
SL		 1055
1056 if (sk->sk_prot->init) {
1057 rc = sk->sk_prot->init(sk);
1058 if (rc)
1059 sk_common_release(sk);
1060 }
1061out:
1062 return rc;
1063}
1064
ec1b4cf7 1065static const struct net_proto_family ieee802154_family_ops = {
9ec76716
SL		 1066 .family = PF_IEEE802154,
1067 .create = ieee802154_create,
1068 .owner = THIS_MODULE,
1069};
1070
1071static int ieee802154_rcv(struct sk_buff *skb, struct net_device *dev,
4710d806 1072 struct packet_type *pt, struct net_device *orig_dev)
9ec76716 1073{
9ec76716 1074 if (!netif_running(dev))
fa1da883 1075 goto drop;
9ec76716 1076 pr_debug("got frame, type %d, dev %p\n", dev->type, dev);
25502bda 1077#ifdef DEBUG
4710d806
VB		 1078 print_hex_dump_bytes("ieee802154_rcv ",
1079 DUMP_PREFIX_NONE, skb->data, skb->len);
25502bda 1080#endif
9ec76716
SL		 1081
1082 if (!net_eq(dev_net(dev), &init_net))
1083 goto drop;
1084
1085 ieee802154_raw_deliver(dev, skb);
1086
1087 if (dev->type != ARPHRD_IEEE802154)
1088 goto drop;
1089
1090 if (skb->pkt_type != PACKET_OTHERHOST)
1091 return ieee802154_dgram_deliver(dev, skb);
1092
1093drop:
1094 kfree_skb(skb);
1095 return NET_RX_DROP;
1096}
1097
9ec76716 1098static struct packet_type ieee802154_packet_type = {
ec633eb5 1099 .type = htons(ETH_P_IEEE802154),
9ec76716
SL		 1100 .func = ieee802154_rcv,
1101};
1102
1103static int __init af_ieee802154_init(void)
1104{
1105 int rc = -EINVAL;
1106
1107 rc = proto_register(&ieee802154_raw_prot, 1);
1108 if (rc)
1109 goto out;
1110
1111 rc = proto_register(&ieee802154_dgram_prot, 1);
1112 if (rc)
1113 goto err_dgram;
1114
1115 /* Tell SOCKET that we are alive */
1116 rc = sock_register(&ieee802154_family_ops);
1117 if (rc)
1118 goto err_sock;
1119 dev_add_pack(&ieee802154_packet_type);
1120
1121 rc = 0;
1122 goto out;
1123
1124err_sock:
1125 proto_unregister(&ieee802154_dgram_prot);
1126err_dgram:
1127 proto_unregister(&ieee802154_raw_prot);
1128out:
1129 return rc;
1130}
6c10dc05 1131
9ec76716
SL		 1132static void __exit af_ieee802154_remove(void)
1133{
1134 dev_remove_pack(&ieee802154_packet_type);
1135 sock_unregister(PF_IEEE802154);
1136 proto_unregister(&ieee802154_dgram_prot);
1137 proto_unregister(&ieee802154_raw_prot);
1138}
1139
1140module_init(af_ieee802154_init);
1141module_exit(af_ieee802154_remove);
1142
1143MODULE_LICENSE("GPL");
1144MODULE_ALIAS_NETPROTO(PF_IEEE802154);
Linux 6.x block layer and io_uring tree(s)