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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 | ||
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; | |
78f821b6 AA |
304 | skb->protocol = htons(ETH_P_IEEE802154); |
305 | ||
78f821b6 AA |
306 | err = dev_queue_xmit(skb); |
307 | if (err > 0) | |
308 | err = net_xmit_errno(err); | |
309 | ||
a611c58b LZ |
310 | dev_put(dev); |
311 | ||
78f821b6 AA |
312 | return err ?: size; |
313 | ||
314 | out_skb: | |
315 | kfree_skb(skb); | |
316 | out_dev: | |
317 | dev_put(dev); | |
318 | out: | |
319 | return err; | |
320 | } | |
321 | ||
1b784140 YX |
322 | static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
323 | int noblock, int flags, int *addr_len) | |
78f821b6 AA |
324 | { |
325 | size_t copied = 0; | |
326 | int err = -EOPNOTSUPP; | |
327 | struct sk_buff *skb; | |
328 | ||
329 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
330 | if (!skb) | |
331 | goto out; | |
332 | ||
333 | copied = skb->len; | |
334 | if (len < copied) { | |
335 | msg->msg_flags |= MSG_TRUNC; | |
336 | copied = len; | |
337 | } | |
338 | ||
339 | err = skb_copy_datagram_msg(skb, 0, msg, copied); | |
340 | if (err) | |
341 | goto done; | |
342 | ||
343 | sock_recv_ts_and_drops(msg, sk, skb); | |
344 | ||
345 | if (flags & MSG_TRUNC) | |
346 | copied = skb->len; | |
347 | done: | |
348 | skb_free_datagram(sk, skb); | |
349 | out: | |
350 | if (err) | |
351 | return err; | |
352 | return copied; | |
353 | } | |
354 | ||
355 | static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb) | |
356 | { | |
357 | skb = skb_share_check(skb, GFP_ATOMIC); | |
358 | if (!skb) | |
359 | return NET_RX_DROP; | |
360 | ||
361 | if (sock_queue_rcv_skb(sk, skb) < 0) { | |
362 | kfree_skb(skb); | |
363 | return NET_RX_DROP; | |
364 | } | |
365 | ||
366 | return NET_RX_SUCCESS; | |
367 | } | |
368 | ||
369 | static void ieee802154_raw_deliver(struct net_device *dev, struct sk_buff *skb) | |
370 | { | |
371 | struct sock *sk; | |
372 | ||
373 | read_lock(&raw_lock); | |
374 | sk_for_each(sk, &raw_head) { | |
375 | bh_lock_sock(sk); | |
376 | if (!sk->sk_bound_dev_if || | |
377 | sk->sk_bound_dev_if == dev->ifindex) { | |
378 | struct sk_buff *clone; | |
379 | ||
380 | clone = skb_clone(skb, GFP_ATOMIC); | |
381 | if (clone) | |
382 | raw_rcv_skb(sk, clone); | |
383 | } | |
384 | bh_unlock_sock(sk); | |
385 | } | |
386 | read_unlock(&raw_lock); | |
387 | } | |
388 | ||
389 | static int raw_getsockopt(struct sock *sk, int level, int optname, | |
390 | char __user *optval, int __user *optlen) | |
391 | { | |
392 | return -EOPNOTSUPP; | |
393 | } | |
394 | ||
395 | static int raw_setsockopt(struct sock *sk, int level, int optname, | |
396 | char __user *optval, unsigned int optlen) | |
397 | { | |
398 | return -EOPNOTSUPP; | |
399 | } | |
400 | ||
401 | static struct proto ieee802154_raw_prot = { | |
402 | .name = "IEEE-802.15.4-RAW", | |
403 | .owner = THIS_MODULE, | |
404 | .obj_size = sizeof(struct sock), | |
405 | .close = raw_close, | |
406 | .bind = raw_bind, | |
407 | .sendmsg = raw_sendmsg, | |
408 | .recvmsg = raw_recvmsg, | |
409 | .hash = raw_hash, | |
410 | .unhash = raw_unhash, | |
411 | .connect = raw_connect, | |
412 | .disconnect = raw_disconnect, | |
413 | .getsockopt = raw_getsockopt, | |
414 | .setsockopt = raw_setsockopt, | |
415 | }; | |
416 | ||
9ec76716 SL |
417 | static const struct proto_ops ieee802154_raw_ops = { |
418 | .family = PF_IEEE802154, | |
419 | .owner = THIS_MODULE, | |
420 | .release = ieee802154_sock_release, | |
421 | .bind = ieee802154_sock_bind, | |
422 | .connect = ieee802154_sock_connect, | |
423 | .socketpair = sock_no_socketpair, | |
424 | .accept = sock_no_accept, | |
425 | .getname = sock_no_getname, | |
426 | .poll = datagram_poll, | |
427 | .ioctl = ieee802154_sock_ioctl, | |
428 | .listen = sock_no_listen, | |
429 | .shutdown = sock_no_shutdown, | |
430 | .setsockopt = sock_common_setsockopt, | |
431 | .getsockopt = sock_common_getsockopt, | |
432 | .sendmsg = ieee802154_sock_sendmsg, | |
433 | .recvmsg = sock_common_recvmsg, | |
434 | .mmap = sock_no_mmap, | |
435 | .sendpage = sock_no_sendpage, | |
436 | #ifdef CONFIG_COMPAT | |
437 | .compat_setsockopt = compat_sock_common_setsockopt, | |
438 | .compat_getsockopt = compat_sock_common_getsockopt, | |
439 | #endif | |
440 | }; | |
441 | ||
78f821b6 AA |
442 | /* DGRAM Sockets (802.15.4 dataframes) */ |
443 | static HLIST_HEAD(dgram_head); | |
444 | static DEFINE_RWLOCK(dgram_lock); | |
445 | ||
446 | struct dgram_sock { | |
447 | struct sock sk; | |
448 | ||
449 | struct ieee802154_addr src_addr; | |
450 | struct ieee802154_addr dst_addr; | |
451 | ||
452 | unsigned int bound:1; | |
453 | unsigned int connected:1; | |
454 | unsigned int want_ack:1; | |
455 | unsigned int secen:1; | |
456 | unsigned int secen_override:1; | |
457 | unsigned int seclevel:3; | |
458 | unsigned int seclevel_override:1; | |
459 | }; | |
460 | ||
461 | static inline struct dgram_sock *dgram_sk(const struct sock *sk) | |
462 | { | |
463 | return container_of(sk, struct dgram_sock, sk); | |
464 | } | |
465 | ||
086c653f | 466 | static int dgram_hash(struct sock *sk) |
78f821b6 AA |
467 | { |
468 | write_lock_bh(&dgram_lock); | |
469 | sk_add_node(sk, &dgram_head); | |
470 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); | |
471 | write_unlock_bh(&dgram_lock); | |
086c653f CG |
472 | |
473 | return 0; | |
78f821b6 AA |
474 | } |
475 | ||
476 | static void dgram_unhash(struct sock *sk) | |
477 | { | |
478 | write_lock_bh(&dgram_lock); | |
479 | if (sk_del_node_init(sk)) | |
480 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); | |
481 | write_unlock_bh(&dgram_lock); | |
482 | } | |
483 | ||
484 | static int dgram_init(struct sock *sk) | |
485 | { | |
486 | struct dgram_sock *ro = dgram_sk(sk); | |
487 | ||
488 | ro->want_ack = 1; | |
489 | return 0; | |
490 | } | |
491 | ||
492 | static void dgram_close(struct sock *sk, long timeout) | |
493 | { | |
494 | sk_common_release(sk); | |
495 | } | |
496 | ||
497 | static int dgram_bind(struct sock *sk, struct sockaddr *uaddr, int len) | |
498 | { | |
499 | struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr; | |
500 | struct ieee802154_addr haddr; | |
501 | struct dgram_sock *ro = dgram_sk(sk); | |
502 | int err = -EINVAL; | |
503 | struct net_device *dev; | |
504 | ||
505 | lock_sock(sk); | |
506 | ||
507 | ro->bound = 0; | |
508 | ||
509 | if (len < sizeof(*addr)) | |
510 | goto out; | |
511 | ||
512 | if (addr->family != AF_IEEE802154) | |
513 | goto out; | |
514 | ||
515 | ieee802154_addr_from_sa(&haddr, &addr->addr); | |
516 | dev = ieee802154_get_dev(sock_net(sk), &haddr); | |
517 | if (!dev) { | |
518 | err = -ENODEV; | |
519 | goto out; | |
520 | } | |
521 | ||
522 | if (dev->type != ARPHRD_IEEE802154) { | |
523 | err = -ENODEV; | |
524 | goto out_put; | |
525 | } | |
526 | ||
527 | ro->src_addr = haddr; | |
528 | ||
529 | ro->bound = 1; | |
530 | err = 0; | |
531 | out_put: | |
532 | dev_put(dev); | |
533 | out: | |
534 | release_sock(sk); | |
535 | ||
536 | return err; | |
537 | } | |
538 | ||
539 | static int dgram_ioctl(struct sock *sk, int cmd, unsigned long arg) | |
540 | { | |
541 | switch (cmd) { | |
542 | case SIOCOUTQ: | |
543 | { | |
544 | int amount = sk_wmem_alloc_get(sk); | |
545 | ||
546 | return put_user(amount, (int __user *)arg); | |
547 | } | |
548 | ||
549 | case SIOCINQ: | |
550 | { | |
551 | struct sk_buff *skb; | |
552 | unsigned long amount; | |
553 | ||
554 | amount = 0; | |
555 | spin_lock_bh(&sk->sk_receive_queue.lock); | |
556 | skb = skb_peek(&sk->sk_receive_queue); | |
df2f65de | 557 | if (skb) { |
78f821b6 AA |
558 | /* We will only return the amount |
559 | * of this packet since that is all | |
560 | * that will be read. | |
561 | */ | |
562 | amount = skb->len - ieee802154_hdr_length(skb); | |
563 | } | |
564 | spin_unlock_bh(&sk->sk_receive_queue.lock); | |
565 | return put_user(amount, (int __user *)arg); | |
566 | } | |
567 | } | |
568 | ||
569 | return -ENOIOCTLCMD; | |
570 | } | |
571 | ||
572 | /* FIXME: autobind */ | |
573 | static int dgram_connect(struct sock *sk, struct sockaddr *uaddr, | |
574 | int len) | |
575 | { | |
576 | struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr; | |
577 | struct dgram_sock *ro = dgram_sk(sk); | |
578 | int err = 0; | |
579 | ||
580 | if (len < sizeof(*addr)) | |
581 | return -EINVAL; | |
582 | ||
583 | if (addr->family != AF_IEEE802154) | |
584 | return -EINVAL; | |
585 | ||
586 | lock_sock(sk); | |
587 | ||
588 | if (!ro->bound) { | |
589 | err = -ENETUNREACH; | |
590 | goto out; | |
591 | } | |
592 | ||
593 | ieee802154_addr_from_sa(&ro->dst_addr, &addr->addr); | |
594 | ro->connected = 1; | |
595 | ||
596 | out: | |
597 | release_sock(sk); | |
598 | return err; | |
599 | } | |
600 | ||
601 | static int dgram_disconnect(struct sock *sk, int flags) | |
602 | { | |
603 | struct dgram_sock *ro = dgram_sk(sk); | |
604 | ||
605 | lock_sock(sk); | |
606 | ro->connected = 0; | |
607 | release_sock(sk); | |
608 | ||
609 | return 0; | |
610 | } | |
611 | ||
1b784140 | 612 | static int dgram_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) |
78f821b6 AA |
613 | { |
614 | struct net_device *dev; | |
615 | unsigned int mtu; | |
616 | struct sk_buff *skb; | |
617 | struct ieee802154_mac_cb *cb; | |
618 | struct dgram_sock *ro = dgram_sk(sk); | |
619 | struct ieee802154_addr dst_addr; | |
620 | int hlen, tlen; | |
621 | int err; | |
622 | ||
623 | if (msg->msg_flags & MSG_OOB) { | |
624 | pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags); | |
625 | return -EOPNOTSUPP; | |
626 | } | |
627 | ||
628 | if (!ro->connected && !msg->msg_name) | |
629 | return -EDESTADDRREQ; | |
630 | else if (ro->connected && msg->msg_name) | |
631 | return -EISCONN; | |
632 | ||
633 | if (!ro->bound) | |
634 | dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154); | |
635 | else | |
636 | dev = ieee802154_get_dev(sock_net(sk), &ro->src_addr); | |
637 | ||
638 | if (!dev) { | |
639 | pr_debug("no dev\n"); | |
640 | err = -ENXIO; | |
641 | goto out; | |
642 | } | |
b40988c4 | 643 | mtu = IEEE802154_MTU; |
78f821b6 AA |
644 | pr_debug("name = %s, mtu = %u\n", dev->name, mtu); |
645 | ||
646 | if (size > mtu) { | |
5b5e0928 | 647 | pr_debug("size = %zu, mtu = %u\n", size, mtu); |
78f821b6 AA |
648 | err = -EMSGSIZE; |
649 | goto out_dev; | |
650 | } | |
651 | ||
652 | hlen = LL_RESERVED_SPACE(dev); | |
653 | tlen = dev->needed_tailroom; | |
654 | skb = sock_alloc_send_skb(sk, hlen + tlen + size, | |
655 | msg->msg_flags & MSG_DONTWAIT, | |
656 | &err); | |
657 | if (!skb) | |
658 | goto out_dev; | |
659 | ||
660 | skb_reserve(skb, hlen); | |
661 | ||
662 | skb_reset_network_header(skb); | |
663 | ||
664 | cb = mac_cb_init(skb); | |
665 | cb->type = IEEE802154_FC_TYPE_DATA; | |
666 | cb->ackreq = ro->want_ack; | |
667 | ||
668 | if (msg->msg_name) { | |
669 | DECLARE_SOCKADDR(struct sockaddr_ieee802154*, | |
670 | daddr, msg->msg_name); | |
671 | ||
672 | ieee802154_addr_from_sa(&dst_addr, &daddr->addr); | |
673 | } else { | |
674 | dst_addr = ro->dst_addr; | |
675 | } | |
676 | ||
677 | cb->secen = ro->secen; | |
678 | cb->secen_override = ro->secen_override; | |
679 | cb->seclevel = ro->seclevel; | |
680 | cb->seclevel_override = ro->seclevel_override; | |
681 | ||
838b83d6 AA |
682 | err = wpan_dev_hard_header(skb, dev, &dst_addr, |
683 | ro->bound ? &ro->src_addr : NULL, size); | |
78f821b6 AA |
684 | if (err < 0) |
685 | goto out_skb; | |
686 | ||
687 | err = memcpy_from_msg(skb_put(skb, size), msg, size); | |
688 | if (err < 0) | |
689 | goto out_skb; | |
690 | ||
691 | skb->dev = dev; | |
78f821b6 AA |
692 | skb->protocol = htons(ETH_P_IEEE802154); |
693 | ||
78f821b6 AA |
694 | err = dev_queue_xmit(skb); |
695 | if (err > 0) | |
696 | err = net_xmit_errno(err); | |
697 | ||
a611c58b LZ |
698 | dev_put(dev); |
699 | ||
78f821b6 AA |
700 | return err ?: size; |
701 | ||
702 | out_skb: | |
703 | kfree_skb(skb); | |
704 | out_dev: | |
705 | dev_put(dev); | |
706 | out: | |
707 | return err; | |
708 | } | |
709 | ||
1b784140 YX |
710 | static int dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
711 | int noblock, int flags, int *addr_len) | |
78f821b6 AA |
712 | { |
713 | size_t copied = 0; | |
714 | int err = -EOPNOTSUPP; | |
715 | struct sk_buff *skb; | |
716 | DECLARE_SOCKADDR(struct sockaddr_ieee802154 *, saddr, msg->msg_name); | |
717 | ||
718 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
719 | if (!skb) | |
720 | goto out; | |
721 | ||
722 | copied = skb->len; | |
723 | if (len < copied) { | |
724 | msg->msg_flags |= MSG_TRUNC; | |
725 | copied = len; | |
726 | } | |
727 | ||
728 | /* FIXME: skip headers if necessary ?! */ | |
729 | err = skb_copy_datagram_msg(skb, 0, msg, copied); | |
730 | if (err) | |
731 | goto done; | |
732 | ||
733 | sock_recv_ts_and_drops(msg, sk, skb); | |
734 | ||
735 | if (saddr) { | |
8a70cefa LB |
736 | /* Clear the implicit padding in struct sockaddr_ieee802154 |
737 | * (16 bits between 'family' and 'addr') and in struct | |
738 | * ieee802154_addr_sa (16 bits at the end of the structure). | |
739 | */ | |
740 | memset(saddr, 0, sizeof(*saddr)); | |
741 | ||
78f821b6 AA |
742 | saddr->family = AF_IEEE802154; |
743 | ieee802154_addr_to_sa(&saddr->addr, &mac_cb(skb)->source); | |
744 | *addr_len = sizeof(*saddr); | |
745 | } | |
746 | ||
747 | if (flags & MSG_TRUNC) | |
748 | copied = skb->len; | |
749 | done: | |
750 | skb_free_datagram(sk, skb); | |
751 | out: | |
752 | if (err) | |
753 | return err; | |
754 | return copied; | |
755 | } | |
756 | ||
757 | static int dgram_rcv_skb(struct sock *sk, struct sk_buff *skb) | |
758 | { | |
759 | skb = skb_share_check(skb, GFP_ATOMIC); | |
760 | if (!skb) | |
761 | return NET_RX_DROP; | |
762 | ||
763 | if (sock_queue_rcv_skb(sk, skb) < 0) { | |
764 | kfree_skb(skb); | |
765 | return NET_RX_DROP; | |
766 | } | |
767 | ||
768 | return NET_RX_SUCCESS; | |
769 | } | |
770 | ||
771 | static inline bool | |
772 | ieee802154_match_sock(__le64 hw_addr, __le16 pan_id, __le16 short_addr, | |
773 | struct dgram_sock *ro) | |
774 | { | |
775 | if (!ro->bound) | |
776 | return true; | |
777 | ||
778 | if (ro->src_addr.mode == IEEE802154_ADDR_LONG && | |
779 | hw_addr == ro->src_addr.extended_addr) | |
780 | return true; | |
781 | ||
782 | if (ro->src_addr.mode == IEEE802154_ADDR_SHORT && | |
783 | pan_id == ro->src_addr.pan_id && | |
784 | short_addr == ro->src_addr.short_addr) | |
785 | return true; | |
786 | ||
787 | return false; | |
788 | } | |
789 | ||
790 | static int ieee802154_dgram_deliver(struct net_device *dev, struct sk_buff *skb) | |
791 | { | |
792 | struct sock *sk, *prev = NULL; | |
793 | int ret = NET_RX_SUCCESS; | |
794 | __le16 pan_id, short_addr; | |
795 | __le64 hw_addr; | |
796 | ||
797 | /* Data frame processing */ | |
798 | BUG_ON(dev->type != ARPHRD_IEEE802154); | |
799 | ||
c947f7e1 AA |
800 | pan_id = dev->ieee802154_ptr->pan_id; |
801 | short_addr = dev->ieee802154_ptr->short_addr; | |
802 | hw_addr = dev->ieee802154_ptr->extended_addr; | |
78f821b6 AA |
803 | |
804 | read_lock(&dgram_lock); | |
805 | sk_for_each(sk, &dgram_head) { | |
806 | if (ieee802154_match_sock(hw_addr, pan_id, short_addr, | |
807 | dgram_sk(sk))) { | |
808 | if (prev) { | |
809 | struct sk_buff *clone; | |
810 | ||
811 | clone = skb_clone(skb, GFP_ATOMIC); | |
812 | if (clone) | |
813 | dgram_rcv_skb(prev, clone); | |
814 | } | |
815 | ||
816 | prev = sk; | |
817 | } | |
818 | } | |
819 | ||
820 | if (prev) { | |
821 | dgram_rcv_skb(prev, skb); | |
822 | } else { | |
823 | kfree_skb(skb); | |
824 | ret = NET_RX_DROP; | |
825 | } | |
826 | read_unlock(&dgram_lock); | |
827 | ||
828 | return ret; | |
829 | } | |
830 | ||
831 | static int dgram_getsockopt(struct sock *sk, int level, int optname, | |
832 | char __user *optval, int __user *optlen) | |
833 | { | |
834 | struct dgram_sock *ro = dgram_sk(sk); | |
835 | ||
836 | int val, len; | |
837 | ||
838 | if (level != SOL_IEEE802154) | |
839 | return -EOPNOTSUPP; | |
840 | ||
841 | if (get_user(len, optlen)) | |
842 | return -EFAULT; | |
843 | ||
844 | len = min_t(unsigned int, len, sizeof(int)); | |
845 | ||
846 | switch (optname) { | |
847 | case WPAN_WANTACK: | |
848 | val = ro->want_ack; | |
849 | break; | |
850 | case WPAN_SECURITY: | |
851 | if (!ro->secen_override) | |
852 | val = WPAN_SECURITY_DEFAULT; | |
853 | else if (ro->secen) | |
854 | val = WPAN_SECURITY_ON; | |
855 | else | |
856 | val = WPAN_SECURITY_OFF; | |
857 | break; | |
858 | case WPAN_SECURITY_LEVEL: | |
859 | if (!ro->seclevel_override) | |
860 | val = WPAN_SECURITY_LEVEL_DEFAULT; | |
861 | else | |
862 | val = ro->seclevel; | |
863 | break; | |
864 | default: | |
865 | return -ENOPROTOOPT; | |
866 | } | |
867 | ||
868 | if (put_user(len, optlen)) | |
869 | return -EFAULT; | |
870 | if (copy_to_user(optval, &val, len)) | |
871 | return -EFAULT; | |
872 | return 0; | |
873 | } | |
874 | ||
875 | static int dgram_setsockopt(struct sock *sk, int level, int optname, | |
876 | char __user *optval, unsigned int optlen) | |
877 | { | |
878 | struct dgram_sock *ro = dgram_sk(sk); | |
879 | struct net *net = sock_net(sk); | |
880 | int val; | |
881 | int err = 0; | |
882 | ||
883 | if (optlen < sizeof(int)) | |
884 | return -EINVAL; | |
885 | ||
886 | if (get_user(val, (int __user *)optval)) | |
887 | return -EFAULT; | |
888 | ||
889 | lock_sock(sk); | |
890 | ||
891 | switch (optname) { | |
892 | case WPAN_WANTACK: | |
893 | ro->want_ack = !!val; | |
894 | break; | |
895 | case WPAN_SECURITY: | |
896 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN) && | |
897 | !ns_capable(net->user_ns, CAP_NET_RAW)) { | |
898 | err = -EPERM; | |
899 | break; | |
900 | } | |
901 | ||
902 | switch (val) { | |
903 | case WPAN_SECURITY_DEFAULT: | |
904 | ro->secen_override = 0; | |
905 | break; | |
906 | case WPAN_SECURITY_ON: | |
907 | ro->secen_override = 1; | |
908 | ro->secen = 1; | |
909 | break; | |
910 | case WPAN_SECURITY_OFF: | |
911 | ro->secen_override = 1; | |
912 | ro->secen = 0; | |
913 | break; | |
914 | default: | |
915 | err = -EINVAL; | |
916 | break; | |
917 | } | |
918 | break; | |
919 | case WPAN_SECURITY_LEVEL: | |
920 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN) && | |
921 | !ns_capable(net->user_ns, CAP_NET_RAW)) { | |
922 | err = -EPERM; | |
923 | break; | |
924 | } | |
925 | ||
926 | if (val < WPAN_SECURITY_LEVEL_DEFAULT || | |
927 | val > IEEE802154_SCF_SECLEVEL_ENC_MIC128) { | |
928 | err = -EINVAL; | |
929 | } else if (val == WPAN_SECURITY_LEVEL_DEFAULT) { | |
930 | ro->seclevel_override = 0; | |
931 | } else { | |
932 | ro->seclevel_override = 1; | |
933 | ro->seclevel = val; | |
934 | } | |
935 | break; | |
936 | default: | |
937 | err = -ENOPROTOOPT; | |
938 | break; | |
939 | } | |
940 | ||
941 | release_sock(sk); | |
942 | return err; | |
943 | } | |
944 | ||
945 | static struct proto ieee802154_dgram_prot = { | |
946 | .name = "IEEE-802.15.4-MAC", | |
947 | .owner = THIS_MODULE, | |
948 | .obj_size = sizeof(struct dgram_sock), | |
949 | .init = dgram_init, | |
950 | .close = dgram_close, | |
951 | .bind = dgram_bind, | |
952 | .sendmsg = dgram_sendmsg, | |
953 | .recvmsg = dgram_recvmsg, | |
954 | .hash = dgram_hash, | |
955 | .unhash = dgram_unhash, | |
956 | .connect = dgram_connect, | |
957 | .disconnect = dgram_disconnect, | |
958 | .ioctl = dgram_ioctl, | |
959 | .getsockopt = dgram_getsockopt, | |
960 | .setsockopt = dgram_setsockopt, | |
961 | }; | |
962 | ||
9ec76716 SL |
963 | static const struct proto_ops ieee802154_dgram_ops = { |
964 | .family = PF_IEEE802154, | |
965 | .owner = THIS_MODULE, | |
966 | .release = ieee802154_sock_release, | |
967 | .bind = ieee802154_sock_bind, | |
968 | .connect = ieee802154_sock_connect, | |
969 | .socketpair = sock_no_socketpair, | |
970 | .accept = sock_no_accept, | |
971 | .getname = sock_no_getname, | |
972 | .poll = datagram_poll, | |
973 | .ioctl = ieee802154_sock_ioctl, | |
974 | .listen = sock_no_listen, | |
975 | .shutdown = sock_no_shutdown, | |
976 | .setsockopt = sock_common_setsockopt, | |
977 | .getsockopt = sock_common_getsockopt, | |
978 | .sendmsg = ieee802154_sock_sendmsg, | |
979 | .recvmsg = sock_common_recvmsg, | |
980 | .mmap = sock_no_mmap, | |
981 | .sendpage = sock_no_sendpage, | |
982 | #ifdef CONFIG_COMPAT | |
983 | .compat_setsockopt = compat_sock_common_setsockopt, | |
984 | .compat_getsockopt = compat_sock_common_getsockopt, | |
985 | #endif | |
986 | }; | |
987 | ||
4710d806 | 988 | /* Create a socket. Initialise the socket, blank the addresses |
9ec76716 SL |
989 | * set the state. |
990 | */ | |
991 | static int ieee802154_create(struct net *net, struct socket *sock, | |
3f378b68 | 992 | int protocol, int kern) |
9ec76716 SL |
993 | { |
994 | struct sock *sk; | |
995 | int rc; | |
996 | struct proto *proto; | |
997 | const struct proto_ops *ops; | |
998 | ||
09ad9bc7 | 999 | if (!net_eq(net, &init_net)) |
9ec76716 SL |
1000 | return -EAFNOSUPPORT; |
1001 | ||
1002 | switch (sock->type) { | |
1003 | case SOCK_RAW: | |
1004 | proto = &ieee802154_raw_prot; | |
1005 | ops = &ieee802154_raw_ops; | |
1006 | break; | |
1007 | case SOCK_DGRAM: | |
1008 | proto = &ieee802154_dgram_prot; | |
1009 | ops = &ieee802154_dgram_ops; | |
1010 | break; | |
1011 | default: | |
1012 | rc = -ESOCKTNOSUPPORT; | |
1013 | goto out; | |
1014 | } | |
1015 | ||
1016 | rc = -ENOMEM; | |
11aa9c28 | 1017 | sk = sk_alloc(net, PF_IEEE802154, GFP_KERNEL, proto, kern); |
9ec76716 SL |
1018 | if (!sk) |
1019 | goto out; | |
1020 | rc = 0; | |
1021 | ||
1022 | sock->ops = ops; | |
1023 | ||
1024 | sock_init_data(sock, sk); | |
1025 | /* FIXME: sk->sk_destruct */ | |
1026 | sk->sk_family = PF_IEEE802154; | |
1027 | ||
1028 | /* Checksums on by default */ | |
1029 | sock_set_flag(sk, SOCK_ZAPPED); | |
1030 | ||
086c653f CG |
1031 | if (sk->sk_prot->hash) { |
1032 | rc = sk->sk_prot->hash(sk); | |
1033 | if (rc) { | |
1034 | sk_common_release(sk); | |
1035 | goto out; | |
1036 | } | |
1037 | } | |
9ec76716 SL |
1038 | |
1039 | if (sk->sk_prot->init) { | |
1040 | rc = sk->sk_prot->init(sk); | |
1041 | if (rc) | |
1042 | sk_common_release(sk); | |
1043 | } | |
1044 | out: | |
1045 | return rc; | |
1046 | } | |
1047 | ||
ec1b4cf7 | 1048 | static const struct net_proto_family ieee802154_family_ops = { |
9ec76716 SL |
1049 | .family = PF_IEEE802154, |
1050 | .create = ieee802154_create, | |
1051 | .owner = THIS_MODULE, | |
1052 | }; | |
1053 | ||
1054 | static int ieee802154_rcv(struct sk_buff *skb, struct net_device *dev, | |
4710d806 | 1055 | struct packet_type *pt, struct net_device *orig_dev) |
9ec76716 | 1056 | { |
9ec76716 | 1057 | if (!netif_running(dev)) |
fa1da883 | 1058 | goto drop; |
9ec76716 | 1059 | pr_debug("got frame, type %d, dev %p\n", dev->type, dev); |
25502bda | 1060 | #ifdef DEBUG |
4710d806 VB |
1061 | print_hex_dump_bytes("ieee802154_rcv ", |
1062 | DUMP_PREFIX_NONE, skb->data, skb->len); | |
25502bda | 1063 | #endif |
9ec76716 SL |
1064 | |
1065 | if (!net_eq(dev_net(dev), &init_net)) | |
1066 | goto drop; | |
1067 | ||
1068 | ieee802154_raw_deliver(dev, skb); | |
1069 | ||
1070 | if (dev->type != ARPHRD_IEEE802154) | |
1071 | goto drop; | |
1072 | ||
1073 | if (skb->pkt_type != PACKET_OTHERHOST) | |
1074 | return ieee802154_dgram_deliver(dev, skb); | |
1075 | ||
1076 | drop: | |
1077 | kfree_skb(skb); | |
1078 | return NET_RX_DROP; | |
1079 | } | |
1080 | ||
9ec76716 | 1081 | static struct packet_type ieee802154_packet_type = { |
ec633eb5 | 1082 | .type = htons(ETH_P_IEEE802154), |
9ec76716 SL |
1083 | .func = ieee802154_rcv, |
1084 | }; | |
1085 | ||
1086 | static int __init af_ieee802154_init(void) | |
1087 | { | |
1088 | int rc = -EINVAL; | |
1089 | ||
1090 | rc = proto_register(&ieee802154_raw_prot, 1); | |
1091 | if (rc) | |
1092 | goto out; | |
1093 | ||
1094 | rc = proto_register(&ieee802154_dgram_prot, 1); | |
1095 | if (rc) | |
1096 | goto err_dgram; | |
1097 | ||
1098 | /* Tell SOCKET that we are alive */ | |
1099 | rc = sock_register(&ieee802154_family_ops); | |
1100 | if (rc) | |
1101 | goto err_sock; | |
1102 | dev_add_pack(&ieee802154_packet_type); | |
1103 | ||
1104 | rc = 0; | |
1105 | goto out; | |
1106 | ||
1107 | err_sock: | |
1108 | proto_unregister(&ieee802154_dgram_prot); | |
1109 | err_dgram: | |
1110 | proto_unregister(&ieee802154_raw_prot); | |
1111 | out: | |
1112 | return rc; | |
1113 | } | |
6c10dc05 | 1114 | |
9ec76716 SL |
1115 | static void __exit af_ieee802154_remove(void) |
1116 | { | |
1117 | dev_remove_pack(&ieee802154_packet_type); | |
1118 | sock_unregister(PF_IEEE802154); | |
1119 | proto_unregister(&ieee802154_dgram_prot); | |
1120 | proto_unregister(&ieee802154_raw_prot); | |
1121 | } | |
1122 | ||
1123 | module_init(af_ieee802154_init); | |
1124 | module_exit(af_ieee802154_remove); | |
1125 | ||
1126 | MODULE_LICENSE("GPL"); | |
1127 | MODULE_ALIAS_NETPROTO(PF_IEEE802154); |