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Commit | Line | Data |
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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> |
9ec76716 SL |
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 | ||
f0166e5e DES |
34 | #include <net/af_ieee802154.h> |
35 | #include <net/ieee802154_netdev.h> | |
9ec76716 | 36 | |
4710d806 | 37 | /* Utility function for families */ |
78f821b6 | 38 | static struct net_device* |
e6278d92 | 39 | ieee802154_get_dev(struct net *net, const struct ieee802154_addr *addr) |
9ec76716 SL |
40 | { |
41 | struct net_device *dev = NULL; | |
42 | struct net_device *tmp; | |
b70ab2e8 | 43 | __le16 pan_id, short_addr; |
e6278d92 | 44 | u8 hwaddr[IEEE802154_ADDR_LEN]; |
9ec76716 | 45 | |
e6278d92 | 46 | switch (addr->mode) { |
9ec76716 | 47 | case IEEE802154_ADDR_LONG: |
e6278d92 | 48 | ieee802154_devaddr_to_raw(hwaddr, addr->extended_addr); |
941666c2 | 49 | rcu_read_lock(); |
e6278d92 | 50 | dev = dev_getbyhwaddr_rcu(net, ARPHRD_IEEE802154, hwaddr); |
9ec76716 SL |
51 | if (dev) |
52 | dev_hold(dev); | |
941666c2 | 53 | rcu_read_unlock(); |
9ec76716 SL |
54 | break; |
55 | case IEEE802154_ADDR_SHORT: | |
e6278d92 PB |
56 | if (addr->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST) || |
57 | addr->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) || | |
06324f2f | 58 | addr->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST)) |
9ec76716 SL |
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 | ||
e6278d92 PB |
71 | if (pan_id == addr->pan_id && |
72 | short_addr == addr->short_addr) { | |
9ec76716 SL |
73 | dev = tmp; |
74 | dev_hold(dev); | |
75 | break; | |
76 | } | |
77 | } | |
78 | ||
79 | rtnl_unlock(); | |
80 | break; | |
81 | default: | |
4710d806 VB |
82 | pr_warn("Unsupported ieee802154 address type: %d\n", |
83 | addr->mode); | |
9ec76716 SL |
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 | } | |
6c10dc05 | 100 | |
9ec76716 | 101 | static int ieee802154_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
4710d806 | 102 | struct msghdr *msg, size_t len) |
9ec76716 SL |
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, | |
4710d806 | 110 | int addr_len) |
9ec76716 SL |
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, | |
4710d806 | 121 | int addr_len, int flags) |
9ec76716 SL |
122 | { |
123 | struct sock *sk = sock->sk; | |
124 | ||
6503d961 CG |
125 | if (addr_len < sizeof(uaddr->sa_family)) |
126 | return -EINVAL; | |
127 | ||
9ec76716 SL |
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, | |
4710d806 | 135 | unsigned int cmd) |
9ec76716 SL |
136 | { |
137 | struct ifreq ifr; | |
45a41d14 | 138 | int ret = -ENOIOCTLCMD; |
9ec76716 SL |
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); | |
45a41d14 | 148 | |
93c0c8b4 SS |
149 | if (!dev) |
150 | return -ENODEV; | |
151 | ||
929122cd | 152 | if (dev->type == ARPHRD_IEEE802154 && dev->netdev_ops->ndo_do_ioctl) |
9ec76716 SL |
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, | |
4710d806 | 163 | unsigned long arg) |
9ec76716 SL |
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 | ||
78f821b6 AA |
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 | ||
9ec76716 SL |
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 | ||
78f821b6 AA |
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 != NULL) { | |
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 | ||
9ec76716 SL |
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 | ||
4710d806 | 991 | /* Create a socket. Initialise the socket, blank the addresses |
9ec76716 SL |
992 | * set the state. |
993 | */ | |
994 | static int ieee802154_create(struct net *net, struct socket *sock, | |
3f378b68 | 995 | int protocol, int kern) |
9ec76716 SL |
996 | { |
997 | struct sock *sk; | |
998 | int rc; | |
999 | struct proto *proto; | |
1000 | const struct proto_ops *ops; | |
1001 | ||
09ad9bc7 | 1002 | if (!net_eq(net, &init_net)) |
9ec76716 SL |
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 | ||
ec1b4cf7 | 1046 | static const struct net_proto_family ieee802154_family_ops = { |
9ec76716 SL |
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, | |
4710d806 | 1053 | struct packet_type *pt, struct net_device *orig_dev) |
9ec76716 | 1054 | { |
9ec76716 | 1055 | if (!netif_running(dev)) |
fa1da883 | 1056 | goto drop; |
9ec76716 | 1057 | pr_debug("got frame, type %d, dev %p\n", dev->type, dev); |
25502bda | 1058 | #ifdef DEBUG |
4710d806 VB |
1059 | print_hex_dump_bytes("ieee802154_rcv ", |
1060 | DUMP_PREFIX_NONE, skb->data, skb->len); | |
25502bda | 1061 | #endif |
9ec76716 SL |
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 | ||
9ec76716 | 1079 | static struct packet_type ieee802154_packet_type = { |
ec633eb5 | 1080 | .type = htons(ETH_P_IEEE802154), |
9ec76716 SL |
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 | } | |
6c10dc05 | 1112 | |
9ec76716 SL |
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); |