]>
Commit | Line | Data |
---|---|---|
1802d0be | 1 | // SPDX-License-Identifier: GPL-2.0-only |
9ec76716 SL |
2 | /* |
3 | * IEEE802154.4 socket interface | |
4 | * | |
5 | * Copyright 2007, 2008 Siemens AG | |
6 | * | |
9ec76716 SL |
7 | * Written by: |
8 | * Sergey Lapin <slapin@ossfans.org> | |
9 | * Maxim Gorbachyov <maxim.gorbachev@siemens.com> | |
10 | */ | |
11 | ||
12 | #include <linux/net.h> | |
13 | #include <linux/capability.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/if_arp.h> | |
16 | #include <linux/if.h> | |
17 | #include <linux/termios.h> /* For TIOCOUTQ/INQ */ | |
18 | #include <linux/list.h> | |
5a0e3ad6 | 19 | #include <linux/slab.h> |
811e299f | 20 | #include <linux/socket.h> |
9ec76716 SL |
21 | #include <net/datalink.h> |
22 | #include <net/psnap.h> | |
23 | #include <net/sock.h> | |
24 | #include <net/tcp_states.h> | |
25 | #include <net/route.h> | |
26 | ||
f0166e5e DES |
27 | #include <net/af_ieee802154.h> |
28 | #include <net/ieee802154_netdev.h> | |
9ec76716 | 29 | |
4710d806 | 30 | /* Utility function for families */ |
78f821b6 | 31 | static struct net_device* |
e6278d92 | 32 | ieee802154_get_dev(struct net *net, const struct ieee802154_addr *addr) |
9ec76716 SL |
33 | { |
34 | struct net_device *dev = NULL; | |
35 | struct net_device *tmp; | |
b70ab2e8 | 36 | __le16 pan_id, short_addr; |
e6278d92 | 37 | u8 hwaddr[IEEE802154_ADDR_LEN]; |
9ec76716 | 38 | |
e6278d92 | 39 | switch (addr->mode) { |
9ec76716 | 40 | case IEEE802154_ADDR_LONG: |
e6278d92 | 41 | ieee802154_devaddr_to_raw(hwaddr, addr->extended_addr); |
941666c2 | 42 | rcu_read_lock(); |
e6278d92 | 43 | dev = dev_getbyhwaddr_rcu(net, ARPHRD_IEEE802154, hwaddr); |
9ec76716 SL |
44 | if (dev) |
45 | dev_hold(dev); | |
941666c2 | 46 | rcu_read_unlock(); |
9ec76716 SL |
47 | break; |
48 | case IEEE802154_ADDR_SHORT: | |
e6278d92 PB |
49 | if (addr->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST) || |
50 | addr->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) || | |
06324f2f | 51 | addr->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST)) |
9ec76716 SL |
52 | break; |
53 | ||
54 | rtnl_lock(); | |
55 | ||
56 | for_each_netdev(net, tmp) { | |
57 | if (tmp->type != ARPHRD_IEEE802154) | |
58 | continue; | |
59 | ||
c947f7e1 AA |
60 | pan_id = tmp->ieee802154_ptr->pan_id; |
61 | short_addr = tmp->ieee802154_ptr->short_addr; | |
e6278d92 PB |
62 | if (pan_id == addr->pan_id && |
63 | short_addr == addr->short_addr) { | |
9ec76716 SL |
64 | dev = tmp; |
65 | dev_hold(dev); | |
66 | break; | |
67 | } | |
68 | } | |
69 | ||
70 | rtnl_unlock(); | |
71 | break; | |
72 | default: | |
4710d806 VB |
73 | pr_warn("Unsupported ieee802154 address type: %d\n", |
74 | addr->mode); | |
9ec76716 SL |
75 | break; |
76 | } | |
77 | ||
78 | return dev; | |
79 | } | |
80 | ||
81 | static int ieee802154_sock_release(struct socket *sock) | |
82 | { | |
83 | struct sock *sk = sock->sk; | |
84 | ||
85 | if (sk) { | |
86 | sock->sk = NULL; | |
87 | sk->sk_prot->close(sk, 0); | |
88 | } | |
89 | return 0; | |
90 | } | |
6c10dc05 | 91 | |
1b784140 YX |
92 | static int ieee802154_sock_sendmsg(struct socket *sock, struct msghdr *msg, |
93 | size_t len) | |
9ec76716 SL |
94 | { |
95 | struct sock *sk = sock->sk; | |
96 | ||
1b784140 | 97 | return sk->sk_prot->sendmsg(sk, msg, len); |
9ec76716 SL |
98 | } |
99 | ||
100 | static int ieee802154_sock_bind(struct socket *sock, struct sockaddr *uaddr, | |
4710d806 | 101 | int addr_len) |
9ec76716 SL |
102 | { |
103 | struct sock *sk = sock->sk; | |
104 | ||
105 | if (sk->sk_prot->bind) | |
106 | return sk->sk_prot->bind(sk, uaddr, addr_len); | |
107 | ||
108 | return sock_no_bind(sock, uaddr, addr_len); | |
109 | } | |
110 | ||
111 | static int ieee802154_sock_connect(struct socket *sock, struct sockaddr *uaddr, | |
4710d806 | 112 | int addr_len, int flags) |
9ec76716 SL |
113 | { |
114 | struct sock *sk = sock->sk; | |
115 | ||
6503d961 CG |
116 | if (addr_len < sizeof(uaddr->sa_family)) |
117 | return -EINVAL; | |
118 | ||
9ec76716 SL |
119 | if (uaddr->sa_family == AF_UNSPEC) |
120 | return sk->sk_prot->disconnect(sk, flags); | |
121 | ||
122 | return sk->sk_prot->connect(sk, uaddr, addr_len); | |
123 | } | |
124 | ||
125 | static int ieee802154_dev_ioctl(struct sock *sk, struct ifreq __user *arg, | |
4710d806 | 126 | unsigned int cmd) |
9ec76716 SL |
127 | { |
128 | struct ifreq ifr; | |
45a41d14 | 129 | int ret = -ENOIOCTLCMD; |
9ec76716 SL |
130 | struct net_device *dev; |
131 | ||
132 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) | |
133 | return -EFAULT; | |
134 | ||
135 | ifr.ifr_name[IFNAMSIZ-1] = 0; | |
136 | ||
137 | dev_load(sock_net(sk), ifr.ifr_name); | |
138 | dev = dev_get_by_name(sock_net(sk), ifr.ifr_name); | |
45a41d14 | 139 | |
93c0c8b4 SS |
140 | if (!dev) |
141 | return -ENODEV; | |
142 | ||
929122cd | 143 | if (dev->type == ARPHRD_IEEE802154 && dev->netdev_ops->ndo_do_ioctl) |
9ec76716 SL |
144 | ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, cmd); |
145 | ||
146 | if (!ret && copy_to_user(arg, &ifr, sizeof(struct ifreq))) | |
147 | ret = -EFAULT; | |
148 | dev_put(dev); | |
149 | ||
150 | return ret; | |
151 | } | |
152 | ||
153 | static int ieee802154_sock_ioctl(struct socket *sock, unsigned int cmd, | |
4710d806 | 154 | unsigned long arg) |
9ec76716 SL |
155 | { |
156 | struct sock *sk = sock->sk; | |
157 | ||
158 | switch (cmd) { | |
9ec76716 SL |
159 | case SIOCGIFADDR: |
160 | case SIOCSIFADDR: | |
161 | return ieee802154_dev_ioctl(sk, (struct ifreq __user *)arg, | |
162 | cmd); | |
163 | default: | |
164 | if (!sk->sk_prot->ioctl) | |
165 | return -ENOIOCTLCMD; | |
166 | return sk->sk_prot->ioctl(sk, cmd, arg); | |
167 | } | |
168 | } | |
169 | ||
78f821b6 AA |
170 | /* RAW Sockets (802.15.4 created in userspace) */ |
171 | static HLIST_HEAD(raw_head); | |
172 | static DEFINE_RWLOCK(raw_lock); | |
173 | ||
086c653f | 174 | static int raw_hash(struct sock *sk) |
78f821b6 AA |
175 | { |
176 | write_lock_bh(&raw_lock); | |
177 | sk_add_node(sk, &raw_head); | |
178 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); | |
179 | write_unlock_bh(&raw_lock); | |
086c653f CG |
180 | |
181 | return 0; | |
78f821b6 AA |
182 | } |
183 | ||
184 | static void raw_unhash(struct sock *sk) | |
185 | { | |
186 | write_lock_bh(&raw_lock); | |
187 | if (sk_del_node_init(sk)) | |
188 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); | |
189 | write_unlock_bh(&raw_lock); | |
190 | } | |
191 | ||
192 | static void raw_close(struct sock *sk, long timeout) | |
193 | { | |
194 | sk_common_release(sk); | |
195 | } | |
196 | ||
197 | static int raw_bind(struct sock *sk, struct sockaddr *_uaddr, int len) | |
198 | { | |
199 | struct ieee802154_addr addr; | |
200 | struct sockaddr_ieee802154 *uaddr = (struct sockaddr_ieee802154 *)_uaddr; | |
201 | int err = 0; | |
202 | struct net_device *dev = NULL; | |
203 | ||
204 | if (len < sizeof(*uaddr)) | |
205 | return -EINVAL; | |
206 | ||
207 | uaddr = (struct sockaddr_ieee802154 *)_uaddr; | |
208 | if (uaddr->family != AF_IEEE802154) | |
209 | return -EINVAL; | |
210 | ||
211 | lock_sock(sk); | |
212 | ||
213 | ieee802154_addr_from_sa(&addr, &uaddr->addr); | |
214 | dev = ieee802154_get_dev(sock_net(sk), &addr); | |
215 | if (!dev) { | |
216 | err = -ENODEV; | |
217 | goto out; | |
218 | } | |
219 | ||
78f821b6 AA |
220 | sk->sk_bound_dev_if = dev->ifindex; |
221 | sk_dst_reset(sk); | |
222 | ||
78f821b6 AA |
223 | dev_put(dev); |
224 | out: | |
225 | release_sock(sk); | |
226 | ||
227 | return err; | |
228 | } | |
229 | ||
230 | static int raw_connect(struct sock *sk, struct sockaddr *uaddr, | |
231 | int addr_len) | |
232 | { | |
233 | return -ENOTSUPP; | |
234 | } | |
235 | ||
236 | static int raw_disconnect(struct sock *sk, int flags) | |
237 | { | |
238 | return 0; | |
239 | } | |
240 | ||
1b784140 | 241 | static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) |
78f821b6 AA |
242 | { |
243 | struct net_device *dev; | |
244 | unsigned int mtu; | |
245 | struct sk_buff *skb; | |
246 | int hlen, tlen; | |
247 | int err; | |
248 | ||
249 | if (msg->msg_flags & MSG_OOB) { | |
250 | pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags); | |
251 | return -EOPNOTSUPP; | |
252 | } | |
253 | ||
254 | lock_sock(sk); | |
255 | if (!sk->sk_bound_dev_if) | |
256 | dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154); | |
257 | else | |
258 | dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if); | |
259 | release_sock(sk); | |
260 | ||
261 | if (!dev) { | |
262 | pr_debug("no dev\n"); | |
263 | err = -ENXIO; | |
264 | goto out; | |
265 | } | |
266 | ||
b40988c4 | 267 | mtu = IEEE802154_MTU; |
78f821b6 AA |
268 | pr_debug("name = %s, mtu = %u\n", dev->name, mtu); |
269 | ||
270 | if (size > mtu) { | |
5b5e0928 | 271 | pr_debug("size = %zu, mtu = %u\n", size, mtu); |
c032705e | 272 | err = -EMSGSIZE; |
78f821b6 AA |
273 | goto out_dev; |
274 | } | |
275 | ||
276 | hlen = LL_RESERVED_SPACE(dev); | |
277 | tlen = dev->needed_tailroom; | |
278 | skb = sock_alloc_send_skb(sk, hlen + tlen + size, | |
279 | msg->msg_flags & MSG_DONTWAIT, &err); | |
280 | if (!skb) | |
281 | goto out_dev; | |
282 | ||
283 | skb_reserve(skb, hlen); | |
284 | ||
285 | skb_reset_mac_header(skb); | |
286 | skb_reset_network_header(skb); | |
287 | ||
288 | err = memcpy_from_msg(skb_put(skb, size), msg, size); | |
289 | if (err < 0) | |
290 | goto out_skb; | |
291 | ||
292 | skb->dev = dev; | |
78f821b6 AA |
293 | skb->protocol = htons(ETH_P_IEEE802154); |
294 | ||
78f821b6 AA |
295 | err = dev_queue_xmit(skb); |
296 | if (err > 0) | |
297 | err = net_xmit_errno(err); | |
298 | ||
a611c58b LZ |
299 | dev_put(dev); |
300 | ||
78f821b6 AA |
301 | return err ?: size; |
302 | ||
303 | out_skb: | |
304 | kfree_skb(skb); | |
305 | out_dev: | |
306 | dev_put(dev); | |
307 | out: | |
308 | return err; | |
309 | } | |
310 | ||
1b784140 YX |
311 | static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
312 | int noblock, int flags, int *addr_len) | |
78f821b6 AA |
313 | { |
314 | size_t copied = 0; | |
315 | int err = -EOPNOTSUPP; | |
316 | struct sk_buff *skb; | |
317 | ||
318 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
319 | if (!skb) | |
320 | goto out; | |
321 | ||
322 | copied = skb->len; | |
323 | if (len < copied) { | |
324 | msg->msg_flags |= MSG_TRUNC; | |
325 | copied = len; | |
326 | } | |
327 | ||
328 | err = skb_copy_datagram_msg(skb, 0, msg, copied); | |
329 | if (err) | |
330 | goto done; | |
331 | ||
332 | sock_recv_ts_and_drops(msg, sk, skb); | |
333 | ||
334 | if (flags & MSG_TRUNC) | |
335 | copied = skb->len; | |
336 | done: | |
337 | skb_free_datagram(sk, skb); | |
338 | out: | |
339 | if (err) | |
340 | return err; | |
341 | return copied; | |
342 | } | |
343 | ||
344 | static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb) | |
345 | { | |
346 | skb = skb_share_check(skb, GFP_ATOMIC); | |
347 | if (!skb) | |
348 | return NET_RX_DROP; | |
349 | ||
350 | if (sock_queue_rcv_skb(sk, skb) < 0) { | |
351 | kfree_skb(skb); | |
352 | return NET_RX_DROP; | |
353 | } | |
354 | ||
355 | return NET_RX_SUCCESS; | |
356 | } | |
357 | ||
358 | static void ieee802154_raw_deliver(struct net_device *dev, struct sk_buff *skb) | |
359 | { | |
360 | struct sock *sk; | |
361 | ||
362 | read_lock(&raw_lock); | |
363 | sk_for_each(sk, &raw_head) { | |
364 | bh_lock_sock(sk); | |
365 | if (!sk->sk_bound_dev_if || | |
366 | sk->sk_bound_dev_if == dev->ifindex) { | |
367 | struct sk_buff *clone; | |
368 | ||
369 | clone = skb_clone(skb, GFP_ATOMIC); | |
370 | if (clone) | |
371 | raw_rcv_skb(sk, clone); | |
372 | } | |
373 | bh_unlock_sock(sk); | |
374 | } | |
375 | read_unlock(&raw_lock); | |
376 | } | |
377 | ||
378 | static int raw_getsockopt(struct sock *sk, int level, int optname, | |
379 | char __user *optval, int __user *optlen) | |
380 | { | |
381 | return -EOPNOTSUPP; | |
382 | } | |
383 | ||
384 | static int raw_setsockopt(struct sock *sk, int level, int optname, | |
385 | char __user *optval, unsigned int optlen) | |
386 | { | |
387 | return -EOPNOTSUPP; | |
388 | } | |
389 | ||
390 | static struct proto ieee802154_raw_prot = { | |
391 | .name = "IEEE-802.15.4-RAW", | |
392 | .owner = THIS_MODULE, | |
393 | .obj_size = sizeof(struct sock), | |
394 | .close = raw_close, | |
395 | .bind = raw_bind, | |
396 | .sendmsg = raw_sendmsg, | |
397 | .recvmsg = raw_recvmsg, | |
398 | .hash = raw_hash, | |
399 | .unhash = raw_unhash, | |
400 | .connect = raw_connect, | |
401 | .disconnect = raw_disconnect, | |
402 | .getsockopt = raw_getsockopt, | |
403 | .setsockopt = raw_setsockopt, | |
404 | }; | |
405 | ||
9ec76716 SL |
406 | static const struct proto_ops ieee802154_raw_ops = { |
407 | .family = PF_IEEE802154, | |
408 | .owner = THIS_MODULE, | |
409 | .release = ieee802154_sock_release, | |
410 | .bind = ieee802154_sock_bind, | |
411 | .connect = ieee802154_sock_connect, | |
412 | .socketpair = sock_no_socketpair, | |
413 | .accept = sock_no_accept, | |
414 | .getname = sock_no_getname, | |
a11e1d43 | 415 | .poll = datagram_poll, |
9ec76716 | 416 | .ioctl = ieee802154_sock_ioctl, |
c7cbdbf2 | 417 | .gettstamp = sock_gettstamp, |
9ec76716 SL |
418 | .listen = sock_no_listen, |
419 | .shutdown = sock_no_shutdown, | |
420 | .setsockopt = sock_common_setsockopt, | |
421 | .getsockopt = sock_common_getsockopt, | |
422 | .sendmsg = ieee802154_sock_sendmsg, | |
423 | .recvmsg = sock_common_recvmsg, | |
424 | .mmap = sock_no_mmap, | |
425 | .sendpage = sock_no_sendpage, | |
426 | #ifdef CONFIG_COMPAT | |
427 | .compat_setsockopt = compat_sock_common_setsockopt, | |
428 | .compat_getsockopt = compat_sock_common_getsockopt, | |
429 | #endif | |
430 | }; | |
431 | ||
78f821b6 AA |
432 | /* DGRAM Sockets (802.15.4 dataframes) */ |
433 | static HLIST_HEAD(dgram_head); | |
434 | static DEFINE_RWLOCK(dgram_lock); | |
435 | ||
436 | struct dgram_sock { | |
437 | struct sock sk; | |
438 | ||
439 | struct ieee802154_addr src_addr; | |
440 | struct ieee802154_addr dst_addr; | |
441 | ||
442 | unsigned int bound:1; | |
443 | unsigned int connected:1; | |
444 | unsigned int want_ack:1; | |
811e299f | 445 | unsigned int want_lqi:1; |
78f821b6 AA |
446 | unsigned int secen:1; |
447 | unsigned int secen_override:1; | |
448 | unsigned int seclevel:3; | |
449 | unsigned int seclevel_override:1; | |
450 | }; | |
451 | ||
452 | static inline struct dgram_sock *dgram_sk(const struct sock *sk) | |
453 | { | |
454 | return container_of(sk, struct dgram_sock, sk); | |
455 | } | |
456 | ||
086c653f | 457 | static int dgram_hash(struct sock *sk) |
78f821b6 AA |
458 | { |
459 | write_lock_bh(&dgram_lock); | |
460 | sk_add_node(sk, &dgram_head); | |
461 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); | |
462 | write_unlock_bh(&dgram_lock); | |
086c653f CG |
463 | |
464 | return 0; | |
78f821b6 AA |
465 | } |
466 | ||
467 | static void dgram_unhash(struct sock *sk) | |
468 | { | |
469 | write_lock_bh(&dgram_lock); | |
470 | if (sk_del_node_init(sk)) | |
471 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); | |
472 | write_unlock_bh(&dgram_lock); | |
473 | } | |
474 | ||
475 | static int dgram_init(struct sock *sk) | |
476 | { | |
477 | struct dgram_sock *ro = dgram_sk(sk); | |
478 | ||
479 | ro->want_ack = 1; | |
811e299f | 480 | ro->want_lqi = 0; |
78f821b6 AA |
481 | return 0; |
482 | } | |
483 | ||
484 | static void dgram_close(struct sock *sk, long timeout) | |
485 | { | |
486 | sk_common_release(sk); | |
487 | } | |
488 | ||
489 | static int dgram_bind(struct sock *sk, struct sockaddr *uaddr, int len) | |
490 | { | |
491 | struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr; | |
492 | struct ieee802154_addr haddr; | |
493 | struct dgram_sock *ro = dgram_sk(sk); | |
494 | int err = -EINVAL; | |
495 | struct net_device *dev; | |
496 | ||
497 | lock_sock(sk); | |
498 | ||
499 | ro->bound = 0; | |
500 | ||
501 | if (len < sizeof(*addr)) | |
502 | goto out; | |
503 | ||
504 | if (addr->family != AF_IEEE802154) | |
505 | goto out; | |
506 | ||
507 | ieee802154_addr_from_sa(&haddr, &addr->addr); | |
508 | dev = ieee802154_get_dev(sock_net(sk), &haddr); | |
509 | if (!dev) { | |
510 | err = -ENODEV; | |
511 | goto out; | |
512 | } | |
513 | ||
514 | if (dev->type != ARPHRD_IEEE802154) { | |
515 | err = -ENODEV; | |
516 | goto out_put; | |
517 | } | |
518 | ||
519 | ro->src_addr = haddr; | |
520 | ||
521 | ro->bound = 1; | |
522 | err = 0; | |
523 | out_put: | |
524 | dev_put(dev); | |
525 | out: | |
526 | release_sock(sk); | |
527 | ||
528 | return err; | |
529 | } | |
530 | ||
531 | static int dgram_ioctl(struct sock *sk, int cmd, unsigned long arg) | |
532 | { | |
533 | switch (cmd) { | |
534 | case SIOCOUTQ: | |
535 | { | |
536 | int amount = sk_wmem_alloc_get(sk); | |
537 | ||
538 | return put_user(amount, (int __user *)arg); | |
539 | } | |
540 | ||
541 | case SIOCINQ: | |
542 | { | |
543 | struct sk_buff *skb; | |
544 | unsigned long amount; | |
545 | ||
546 | amount = 0; | |
547 | spin_lock_bh(&sk->sk_receive_queue.lock); | |
548 | skb = skb_peek(&sk->sk_receive_queue); | |
df2f65de | 549 | if (skb) { |
78f821b6 AA |
550 | /* We will only return the amount |
551 | * of this packet since that is all | |
552 | * that will be read. | |
553 | */ | |
554 | amount = skb->len - ieee802154_hdr_length(skb); | |
555 | } | |
556 | spin_unlock_bh(&sk->sk_receive_queue.lock); | |
557 | return put_user(amount, (int __user *)arg); | |
558 | } | |
559 | } | |
560 | ||
561 | return -ENOIOCTLCMD; | |
562 | } | |
563 | ||
564 | /* FIXME: autobind */ | |
565 | static int dgram_connect(struct sock *sk, struct sockaddr *uaddr, | |
566 | int len) | |
567 | { | |
568 | struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr; | |
569 | struct dgram_sock *ro = dgram_sk(sk); | |
570 | int err = 0; | |
571 | ||
572 | if (len < sizeof(*addr)) | |
573 | return -EINVAL; | |
574 | ||
575 | if (addr->family != AF_IEEE802154) | |
576 | return -EINVAL; | |
577 | ||
578 | lock_sock(sk); | |
579 | ||
580 | if (!ro->bound) { | |
581 | err = -ENETUNREACH; | |
582 | goto out; | |
583 | } | |
584 | ||
585 | ieee802154_addr_from_sa(&ro->dst_addr, &addr->addr); | |
586 | ro->connected = 1; | |
587 | ||
588 | out: | |
589 | release_sock(sk); | |
590 | return err; | |
591 | } | |
592 | ||
593 | static int dgram_disconnect(struct sock *sk, int flags) | |
594 | { | |
595 | struct dgram_sock *ro = dgram_sk(sk); | |
596 | ||
597 | lock_sock(sk); | |
598 | ro->connected = 0; | |
599 | release_sock(sk); | |
600 | ||
601 | return 0; | |
602 | } | |
603 | ||
1b784140 | 604 | static int dgram_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) |
78f821b6 AA |
605 | { |
606 | struct net_device *dev; | |
607 | unsigned int mtu; | |
608 | struct sk_buff *skb; | |
609 | struct ieee802154_mac_cb *cb; | |
610 | struct dgram_sock *ro = dgram_sk(sk); | |
611 | struct ieee802154_addr dst_addr; | |
612 | int hlen, tlen; | |
613 | int err; | |
614 | ||
615 | if (msg->msg_flags & MSG_OOB) { | |
616 | pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags); | |
617 | return -EOPNOTSUPP; | |
618 | } | |
619 | ||
620 | if (!ro->connected && !msg->msg_name) | |
621 | return -EDESTADDRREQ; | |
622 | else if (ro->connected && msg->msg_name) | |
623 | return -EISCONN; | |
624 | ||
625 | if (!ro->bound) | |
626 | dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154); | |
627 | else | |
628 | dev = ieee802154_get_dev(sock_net(sk), &ro->src_addr); | |
629 | ||
630 | if (!dev) { | |
631 | pr_debug("no dev\n"); | |
632 | err = -ENXIO; | |
633 | goto out; | |
634 | } | |
b40988c4 | 635 | mtu = IEEE802154_MTU; |
78f821b6 AA |
636 | pr_debug("name = %s, mtu = %u\n", dev->name, mtu); |
637 | ||
638 | if (size > mtu) { | |
5b5e0928 | 639 | pr_debug("size = %zu, mtu = %u\n", size, mtu); |
78f821b6 AA |
640 | err = -EMSGSIZE; |
641 | goto out_dev; | |
642 | } | |
643 | ||
644 | hlen = LL_RESERVED_SPACE(dev); | |
645 | tlen = dev->needed_tailroom; | |
646 | skb = sock_alloc_send_skb(sk, hlen + tlen + size, | |
647 | msg->msg_flags & MSG_DONTWAIT, | |
648 | &err); | |
649 | if (!skb) | |
650 | goto out_dev; | |
651 | ||
652 | skb_reserve(skb, hlen); | |
653 | ||
654 | skb_reset_network_header(skb); | |
655 | ||
656 | cb = mac_cb_init(skb); | |
657 | cb->type = IEEE802154_FC_TYPE_DATA; | |
658 | cb->ackreq = ro->want_ack; | |
659 | ||
660 | if (msg->msg_name) { | |
661 | DECLARE_SOCKADDR(struct sockaddr_ieee802154*, | |
662 | daddr, msg->msg_name); | |
663 | ||
664 | ieee802154_addr_from_sa(&dst_addr, &daddr->addr); | |
665 | } else { | |
666 | dst_addr = ro->dst_addr; | |
667 | } | |
668 | ||
669 | cb->secen = ro->secen; | |
670 | cb->secen_override = ro->secen_override; | |
671 | cb->seclevel = ro->seclevel; | |
672 | cb->seclevel_override = ro->seclevel_override; | |
673 | ||
838b83d6 AA |
674 | err = wpan_dev_hard_header(skb, dev, &dst_addr, |
675 | ro->bound ? &ro->src_addr : NULL, size); | |
78f821b6 AA |
676 | if (err < 0) |
677 | goto out_skb; | |
678 | ||
679 | err = memcpy_from_msg(skb_put(skb, size), msg, size); | |
680 | if (err < 0) | |
681 | goto out_skb; | |
682 | ||
683 | skb->dev = dev; | |
78f821b6 AA |
684 | skb->protocol = htons(ETH_P_IEEE802154); |
685 | ||
78f821b6 AA |
686 | err = dev_queue_xmit(skb); |
687 | if (err > 0) | |
688 | err = net_xmit_errno(err); | |
689 | ||
a611c58b LZ |
690 | dev_put(dev); |
691 | ||
78f821b6 AA |
692 | return err ?: size; |
693 | ||
694 | out_skb: | |
695 | kfree_skb(skb); | |
696 | out_dev: | |
697 | dev_put(dev); | |
698 | out: | |
699 | return err; | |
700 | } | |
701 | ||
1b784140 YX |
702 | static int dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
703 | int noblock, int flags, int *addr_len) | |
78f821b6 AA |
704 | { |
705 | size_t copied = 0; | |
706 | int err = -EOPNOTSUPP; | |
707 | struct sk_buff *skb; | |
811e299f | 708 | struct dgram_sock *ro = dgram_sk(sk); |
78f821b6 AA |
709 | DECLARE_SOCKADDR(struct sockaddr_ieee802154 *, saddr, msg->msg_name); |
710 | ||
711 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
712 | if (!skb) | |
713 | goto out; | |
714 | ||
715 | copied = skb->len; | |
716 | if (len < copied) { | |
717 | msg->msg_flags |= MSG_TRUNC; | |
718 | copied = len; | |
719 | } | |
720 | ||
721 | /* FIXME: skip headers if necessary ?! */ | |
722 | err = skb_copy_datagram_msg(skb, 0, msg, copied); | |
723 | if (err) | |
724 | goto done; | |
725 | ||
726 | sock_recv_ts_and_drops(msg, sk, skb); | |
727 | ||
728 | if (saddr) { | |
8a70cefa LB |
729 | /* Clear the implicit padding in struct sockaddr_ieee802154 |
730 | * (16 bits between 'family' and 'addr') and in struct | |
731 | * ieee802154_addr_sa (16 bits at the end of the structure). | |
732 | */ | |
733 | memset(saddr, 0, sizeof(*saddr)); | |
734 | ||
78f821b6 AA |
735 | saddr->family = AF_IEEE802154; |
736 | ieee802154_addr_to_sa(&saddr->addr, &mac_cb(skb)->source); | |
737 | *addr_len = sizeof(*saddr); | |
738 | } | |
739 | ||
811e299f RC |
740 | if (ro->want_lqi) { |
741 | err = put_cmsg(msg, SOL_IEEE802154, WPAN_WANTLQI, | |
742 | sizeof(uint8_t), &(mac_cb(skb)->lqi)); | |
743 | if (err) | |
744 | goto done; | |
745 | } | |
746 | ||
78f821b6 AA |
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; | |
811e299f RC |
850 | case WPAN_WANTLQI: |
851 | val = ro->want_lqi; | |
852 | break; | |
78f821b6 AA |
853 | case WPAN_SECURITY: |
854 | if (!ro->secen_override) | |
855 | val = WPAN_SECURITY_DEFAULT; | |
856 | else if (ro->secen) | |
857 | val = WPAN_SECURITY_ON; | |
858 | else | |
859 | val = WPAN_SECURITY_OFF; | |
860 | break; | |
861 | case WPAN_SECURITY_LEVEL: | |
862 | if (!ro->seclevel_override) | |
863 | val = WPAN_SECURITY_LEVEL_DEFAULT; | |
864 | else | |
865 | val = ro->seclevel; | |
866 | break; | |
867 | default: | |
868 | return -ENOPROTOOPT; | |
869 | } | |
870 | ||
871 | if (put_user(len, optlen)) | |
872 | return -EFAULT; | |
873 | if (copy_to_user(optval, &val, len)) | |
874 | return -EFAULT; | |
875 | return 0; | |
876 | } | |
877 | ||
878 | static int dgram_setsockopt(struct sock *sk, int level, int optname, | |
879 | char __user *optval, unsigned int optlen) | |
880 | { | |
881 | struct dgram_sock *ro = dgram_sk(sk); | |
882 | struct net *net = sock_net(sk); | |
883 | int val; | |
884 | int err = 0; | |
885 | ||
886 | if (optlen < sizeof(int)) | |
887 | return -EINVAL; | |
888 | ||
889 | if (get_user(val, (int __user *)optval)) | |
890 | return -EFAULT; | |
891 | ||
892 | lock_sock(sk); | |
893 | ||
894 | switch (optname) { | |
895 | case WPAN_WANTACK: | |
896 | ro->want_ack = !!val; | |
897 | break; | |
811e299f RC |
898 | case WPAN_WANTLQI: |
899 | ro->want_lqi = !!val; | |
900 | break; | |
78f821b6 AA |
901 | case WPAN_SECURITY: |
902 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN) && | |
903 | !ns_capable(net->user_ns, CAP_NET_RAW)) { | |
904 | err = -EPERM; | |
905 | break; | |
906 | } | |
907 | ||
908 | switch (val) { | |
909 | case WPAN_SECURITY_DEFAULT: | |
910 | ro->secen_override = 0; | |
911 | break; | |
912 | case WPAN_SECURITY_ON: | |
913 | ro->secen_override = 1; | |
914 | ro->secen = 1; | |
915 | break; | |
916 | case WPAN_SECURITY_OFF: | |
917 | ro->secen_override = 1; | |
918 | ro->secen = 0; | |
919 | break; | |
920 | default: | |
921 | err = -EINVAL; | |
922 | break; | |
923 | } | |
924 | break; | |
925 | case WPAN_SECURITY_LEVEL: | |
926 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN) && | |
927 | !ns_capable(net->user_ns, CAP_NET_RAW)) { | |
928 | err = -EPERM; | |
929 | break; | |
930 | } | |
931 | ||
932 | if (val < WPAN_SECURITY_LEVEL_DEFAULT || | |
933 | val > IEEE802154_SCF_SECLEVEL_ENC_MIC128) { | |
934 | err = -EINVAL; | |
935 | } else if (val == WPAN_SECURITY_LEVEL_DEFAULT) { | |
936 | ro->seclevel_override = 0; | |
937 | } else { | |
938 | ro->seclevel_override = 1; | |
939 | ro->seclevel = val; | |
940 | } | |
941 | break; | |
942 | default: | |
943 | err = -ENOPROTOOPT; | |
944 | break; | |
945 | } | |
946 | ||
947 | release_sock(sk); | |
948 | return err; | |
949 | } | |
950 | ||
951 | static struct proto ieee802154_dgram_prot = { | |
952 | .name = "IEEE-802.15.4-MAC", | |
953 | .owner = THIS_MODULE, | |
954 | .obj_size = sizeof(struct dgram_sock), | |
955 | .init = dgram_init, | |
956 | .close = dgram_close, | |
957 | .bind = dgram_bind, | |
958 | .sendmsg = dgram_sendmsg, | |
959 | .recvmsg = dgram_recvmsg, | |
960 | .hash = dgram_hash, | |
961 | .unhash = dgram_unhash, | |
962 | .connect = dgram_connect, | |
963 | .disconnect = dgram_disconnect, | |
964 | .ioctl = dgram_ioctl, | |
965 | .getsockopt = dgram_getsockopt, | |
966 | .setsockopt = dgram_setsockopt, | |
967 | }; | |
968 | ||
9ec76716 SL |
969 | static const struct proto_ops ieee802154_dgram_ops = { |
970 | .family = PF_IEEE802154, | |
971 | .owner = THIS_MODULE, | |
972 | .release = ieee802154_sock_release, | |
973 | .bind = ieee802154_sock_bind, | |
974 | .connect = ieee802154_sock_connect, | |
975 | .socketpair = sock_no_socketpair, | |
976 | .accept = sock_no_accept, | |
977 | .getname = sock_no_getname, | |
a11e1d43 | 978 | .poll = datagram_poll, |
9ec76716 | 979 | .ioctl = ieee802154_sock_ioctl, |
c7cbdbf2 | 980 | .gettstamp = sock_gettstamp, |
9ec76716 SL |
981 | .listen = sock_no_listen, |
982 | .shutdown = sock_no_shutdown, | |
983 | .setsockopt = sock_common_setsockopt, | |
984 | .getsockopt = sock_common_getsockopt, | |
985 | .sendmsg = ieee802154_sock_sendmsg, | |
986 | .recvmsg = sock_common_recvmsg, | |
987 | .mmap = sock_no_mmap, | |
988 | .sendpage = sock_no_sendpage, | |
989 | #ifdef CONFIG_COMPAT | |
990 | .compat_setsockopt = compat_sock_common_setsockopt, | |
991 | .compat_getsockopt = compat_sock_common_getsockopt, | |
992 | #endif | |
993 | }; | |
994 | ||
4710d806 | 995 | /* Create a socket. Initialise the socket, blank the addresses |
9ec76716 SL |
996 | * set the state. |
997 | */ | |
998 | static int ieee802154_create(struct net *net, struct socket *sock, | |
3f378b68 | 999 | int protocol, int kern) |
9ec76716 SL |
1000 | { |
1001 | struct sock *sk; | |
1002 | int rc; | |
1003 | struct proto *proto; | |
1004 | const struct proto_ops *ops; | |
1005 | ||
09ad9bc7 | 1006 | if (!net_eq(net, &init_net)) |
9ec76716 SL |
1007 | return -EAFNOSUPPORT; |
1008 | ||
1009 | switch (sock->type) { | |
1010 | case SOCK_RAW: | |
1011 | proto = &ieee802154_raw_prot; | |
1012 | ops = &ieee802154_raw_ops; | |
1013 | break; | |
1014 | case SOCK_DGRAM: | |
1015 | proto = &ieee802154_dgram_prot; | |
1016 | ops = &ieee802154_dgram_ops; | |
1017 | break; | |
1018 | default: | |
1019 | rc = -ESOCKTNOSUPPORT; | |
1020 | goto out; | |
1021 | } | |
1022 | ||
1023 | rc = -ENOMEM; | |
11aa9c28 | 1024 | sk = sk_alloc(net, PF_IEEE802154, GFP_KERNEL, proto, kern); |
9ec76716 SL |
1025 | if (!sk) |
1026 | goto out; | |
1027 | rc = 0; | |
1028 | ||
1029 | sock->ops = ops; | |
1030 | ||
1031 | sock_init_data(sock, sk); | |
1032 | /* FIXME: sk->sk_destruct */ | |
1033 | sk->sk_family = PF_IEEE802154; | |
1034 | ||
1035 | /* Checksums on by default */ | |
1036 | sock_set_flag(sk, SOCK_ZAPPED); | |
1037 | ||
086c653f CG |
1038 | if (sk->sk_prot->hash) { |
1039 | rc = sk->sk_prot->hash(sk); | |
1040 | if (rc) { | |
1041 | sk_common_release(sk); | |
1042 | goto out; | |
1043 | } | |
1044 | } | |
9ec76716 SL |
1045 | |
1046 | if (sk->sk_prot->init) { | |
1047 | rc = sk->sk_prot->init(sk); | |
1048 | if (rc) | |
1049 | sk_common_release(sk); | |
1050 | } | |
1051 | out: | |
1052 | return rc; | |
1053 | } | |
1054 | ||
ec1b4cf7 | 1055 | static const struct net_proto_family ieee802154_family_ops = { |
9ec76716 SL |
1056 | .family = PF_IEEE802154, |
1057 | .create = ieee802154_create, | |
1058 | .owner = THIS_MODULE, | |
1059 | }; | |
1060 | ||
1061 | static int ieee802154_rcv(struct sk_buff *skb, struct net_device *dev, | |
4710d806 | 1062 | struct packet_type *pt, struct net_device *orig_dev) |
9ec76716 | 1063 | { |
9ec76716 | 1064 | if (!netif_running(dev)) |
fa1da883 | 1065 | goto drop; |
9ec76716 | 1066 | pr_debug("got frame, type %d, dev %p\n", dev->type, dev); |
25502bda | 1067 | #ifdef DEBUG |
4710d806 VB |
1068 | print_hex_dump_bytes("ieee802154_rcv ", |
1069 | DUMP_PREFIX_NONE, skb->data, skb->len); | |
25502bda | 1070 | #endif |
9ec76716 SL |
1071 | |
1072 | if (!net_eq(dev_net(dev), &init_net)) | |
1073 | goto drop; | |
1074 | ||
1075 | ieee802154_raw_deliver(dev, skb); | |
1076 | ||
1077 | if (dev->type != ARPHRD_IEEE802154) | |
1078 | goto drop; | |
1079 | ||
1080 | if (skb->pkt_type != PACKET_OTHERHOST) | |
1081 | return ieee802154_dgram_deliver(dev, skb); | |
1082 | ||
1083 | drop: | |
1084 | kfree_skb(skb); | |
1085 | return NET_RX_DROP; | |
1086 | } | |
1087 | ||
9ec76716 | 1088 | static struct packet_type ieee802154_packet_type = { |
ec633eb5 | 1089 | .type = htons(ETH_P_IEEE802154), |
9ec76716 SL |
1090 | .func = ieee802154_rcv, |
1091 | }; | |
1092 | ||
1093 | static int __init af_ieee802154_init(void) | |
1094 | { | |
074014ab | 1095 | int rc; |
9ec76716 SL |
1096 | |
1097 | rc = proto_register(&ieee802154_raw_prot, 1); | |
1098 | if (rc) | |
1099 | goto out; | |
1100 | ||
1101 | rc = proto_register(&ieee802154_dgram_prot, 1); | |
1102 | if (rc) | |
1103 | goto err_dgram; | |
1104 | ||
1105 | /* Tell SOCKET that we are alive */ | |
1106 | rc = sock_register(&ieee802154_family_ops); | |
1107 | if (rc) | |
1108 | goto err_sock; | |
1109 | dev_add_pack(&ieee802154_packet_type); | |
1110 | ||
1111 | rc = 0; | |
1112 | goto out; | |
1113 | ||
1114 | err_sock: | |
1115 | proto_unregister(&ieee802154_dgram_prot); | |
1116 | err_dgram: | |
1117 | proto_unregister(&ieee802154_raw_prot); | |
1118 | out: | |
1119 | return rc; | |
1120 | } | |
6c10dc05 | 1121 | |
9ec76716 SL |
1122 | static void __exit af_ieee802154_remove(void) |
1123 | { | |
1124 | dev_remove_pack(&ieee802154_packet_type); | |
1125 | sock_unregister(PF_IEEE802154); | |
1126 | proto_unregister(&ieee802154_dgram_prot); | |
1127 | proto_unregister(&ieee802154_raw_prot); | |
1128 | } | |
1129 | ||
1130 | module_init(af_ieee802154_init); | |
1131 | module_exit(af_ieee802154_remove); | |
1132 | ||
1133 | MODULE_LICENSE("GPL"); | |
1134 | MODULE_ALIAS_NETPROTO(PF_IEEE802154); |