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