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