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