]>
Commit | Line | Data |
---|---|---|
bb58f747 GP |
1 | /* |
2 | BlueZ - Bluetooth protocol stack for Linux | |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> | |
5 | Copyright (C) 2010 Google Inc. | |
6 | ||
7 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License version 2 as | |
11 | published by the Free Software Foundation; | |
12 | ||
13 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
14 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
15 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
16 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
17 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES | |
18 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
19 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
20 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
21 | ||
22 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, | |
23 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
24 | SOFTWARE IS DISCLAIMED. | |
25 | */ | |
26 | ||
27 | /* Bluetooth L2CAP sockets. */ | |
28 | ||
29 | #include <net/bluetooth/bluetooth.h> | |
33575df7 | 30 | #include <net/bluetooth/hci_core.h> |
bb58f747 GP |
31 | #include <net/bluetooth/l2cap.h> |
32 | ||
cf2f90f5 | 33 | static const struct proto_ops l2cap_sock_ops; |
80808e43 GP |
34 | static void l2cap_sock_init(struct sock *sk, struct sock *parent); |
35 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio); | |
cf2f90f5 | 36 | |
af6bcd82 GP |
37 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
38 | { | |
39 | struct sock *sk = sock->sk; | |
4343478f | 40 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
41 | struct sockaddr_l2 la; |
42 | int len, err = 0; | |
43 | ||
44 | BT_DBG("sk %p", sk); | |
45 | ||
46 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
47 | return -EINVAL; | |
48 | ||
49 | memset(&la, 0, sizeof(la)); | |
50 | len = min_t(unsigned int, sizeof(la), alen); | |
51 | memcpy(&la, addr, len); | |
52 | ||
b62f328b | 53 | if (la.l2_cid && la.l2_psm) |
af6bcd82 GP |
54 | return -EINVAL; |
55 | ||
56 | lock_sock(sk); | |
57 | ||
58 | if (sk->sk_state != BT_OPEN) { | |
59 | err = -EBADFD; | |
60 | goto done; | |
61 | } | |
62 | ||
63 | if (la.l2_psm) { | |
64 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
65 | ||
66 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
67 | if ((psm & 0x0101) != 0x0001) { | |
68 | err = -EINVAL; | |
69 | goto done; | |
70 | } | |
71 | ||
72 | /* Restrict usage of well-known PSMs */ | |
73 | if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { | |
74 | err = -EACCES; | |
75 | goto done; | |
76 | } | |
77 | } | |
78 | ||
9e4425ff GP |
79 | if (la.l2_cid) |
80 | err = l2cap_add_scid(chan, la.l2_cid); | |
81 | else | |
82 | err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm); | |
af6bcd82 | 83 | |
9e4425ff GP |
84 | if (err < 0) |
85 | goto done; | |
af6bcd82 | 86 | |
9e4425ff GP |
87 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || |
88 | __le16_to_cpu(la.l2_psm) == 0x0003) | |
89 | chan->sec_level = BT_SECURITY_SDP; | |
b62f328b | 90 | |
9e4425ff | 91 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
89bc500e GP |
92 | |
93 | chan->state = BT_BOUND; | |
9e4425ff | 94 | sk->sk_state = BT_BOUND; |
af6bcd82 GP |
95 | |
96 | done: | |
97 | release_sock(sk); | |
98 | return err; | |
99 | } | |
100 | ||
4e34c50b GP |
101 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) |
102 | { | |
103 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 104 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
4e34c50b GP |
105 | struct sockaddr_l2 la; |
106 | int len, err = 0; | |
107 | ||
108 | BT_DBG("sk %p", sk); | |
109 | ||
110 | if (!addr || alen < sizeof(addr->sa_family) || | |
111 | addr->sa_family != AF_BLUETOOTH) | |
112 | return -EINVAL; | |
113 | ||
114 | memset(&la, 0, sizeof(la)); | |
115 | len = min_t(unsigned int, sizeof(la), alen); | |
116 | memcpy(&la, addr, len); | |
117 | ||
acd7d370 | 118 | if (la.l2_cid && la.l2_psm) |
4e34c50b GP |
119 | return -EINVAL; |
120 | ||
121 | lock_sock(sk); | |
122 | ||
715ec005 | 123 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED |
acd7d370 | 124 | && !(la.l2_psm || la.l2_cid)) { |
4e34c50b GP |
125 | err = -EINVAL; |
126 | goto done; | |
127 | } | |
128 | ||
0c1bc5c6 | 129 | switch (chan->mode) { |
4e34c50b GP |
130 | case L2CAP_MODE_BASIC: |
131 | break; | |
132 | case L2CAP_MODE_ERTM: | |
133 | case L2CAP_MODE_STREAMING: | |
134 | if (!disable_ertm) | |
135 | break; | |
136 | /* fall through */ | |
137 | default: | |
138 | err = -ENOTSUPP; | |
139 | goto done; | |
140 | } | |
141 | ||
142 | switch (sk->sk_state) { | |
143 | case BT_CONNECT: | |
144 | case BT_CONNECT2: | |
145 | case BT_CONFIG: | |
146 | /* Already connecting */ | |
147 | goto wait; | |
148 | ||
149 | case BT_CONNECTED: | |
150 | /* Already connected */ | |
151 | err = -EISCONN; | |
152 | goto done; | |
153 | ||
154 | case BT_OPEN: | |
155 | case BT_BOUND: | |
156 | /* Can connect */ | |
157 | break; | |
158 | ||
159 | default: | |
160 | err = -EBADFD; | |
161 | goto done; | |
162 | } | |
163 | ||
164 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
715ec005 GP |
165 | if ((__le16_to_cpu(la.l2_psm) & 0x0101) != 0x0001 && !la.l2_cid && |
166 | chan->chan_type != L2CAP_CHAN_RAW) { | |
4e34c50b GP |
167 | err = -EINVAL; |
168 | goto done; | |
169 | } | |
170 | ||
171 | /* Set destination address and psm */ | |
172 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); | |
fe4128e0 GP |
173 | chan->psm = la.l2_psm; |
174 | chan->dcid = la.l2_cid; | |
4e34c50b | 175 | |
77a74c7e | 176 | err = l2cap_chan_connect(l2cap_pi(sk)->chan); |
4e34c50b GP |
177 | if (err) |
178 | goto done; | |
179 | ||
180 | wait: | |
181 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
182 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
183 | done: | |
184 | release_sock(sk); | |
185 | return err; | |
186 | } | |
187 | ||
af6bcd82 GP |
188 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
189 | { | |
190 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 191 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
192 | int err = 0; |
193 | ||
194 | BT_DBG("sk %p backlog %d", sk, backlog); | |
195 | ||
196 | lock_sock(sk); | |
197 | ||
198 | if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) | |
199 | || sk->sk_state != BT_BOUND) { | |
200 | err = -EBADFD; | |
201 | goto done; | |
202 | } | |
203 | ||
0c1bc5c6 | 204 | switch (chan->mode) { |
af6bcd82 GP |
205 | case L2CAP_MODE_BASIC: |
206 | break; | |
207 | case L2CAP_MODE_ERTM: | |
208 | case L2CAP_MODE_STREAMING: | |
209 | if (!disable_ertm) | |
210 | break; | |
211 | /* fall through */ | |
212 | default: | |
213 | err = -ENOTSUPP; | |
214 | goto done; | |
215 | } | |
216 | ||
af6bcd82 GP |
217 | sk->sk_max_ack_backlog = backlog; |
218 | sk->sk_ack_backlog = 0; | |
89bc500e GP |
219 | |
220 | chan->state = BT_LISTEN; | |
af6bcd82 GP |
221 | sk->sk_state = BT_LISTEN; |
222 | ||
223 | done: | |
224 | release_sock(sk); | |
225 | return err; | |
226 | } | |
227 | ||
c47b7c72 GP |
228 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) |
229 | { | |
230 | DECLARE_WAITQUEUE(wait, current); | |
231 | struct sock *sk = sock->sk, *nsk; | |
232 | long timeo; | |
233 | int err = 0; | |
234 | ||
235 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
236 | ||
237 | if (sk->sk_state != BT_LISTEN) { | |
238 | err = -EBADFD; | |
239 | goto done; | |
240 | } | |
241 | ||
242 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
243 | ||
244 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
245 | ||
246 | /* Wait for an incoming connection. (wake-one). */ | |
247 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
248 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { | |
249 | set_current_state(TASK_INTERRUPTIBLE); | |
250 | if (!timeo) { | |
251 | err = -EAGAIN; | |
252 | break; | |
253 | } | |
254 | ||
255 | release_sock(sk); | |
256 | timeo = schedule_timeout(timeo); | |
257 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
258 | ||
259 | if (sk->sk_state != BT_LISTEN) { | |
260 | err = -EBADFD; | |
261 | break; | |
262 | } | |
263 | ||
264 | if (signal_pending(current)) { | |
265 | err = sock_intr_errno(timeo); | |
266 | break; | |
267 | } | |
268 | } | |
269 | set_current_state(TASK_RUNNING); | |
270 | remove_wait_queue(sk_sleep(sk), &wait); | |
271 | ||
272 | if (err) | |
273 | goto done; | |
274 | ||
275 | newsock->state = SS_CONNECTED; | |
276 | ||
277 | BT_DBG("new socket %p", nsk); | |
278 | ||
279 | done: | |
280 | release_sock(sk); | |
281 | return err; | |
282 | } | |
283 | ||
d7175d55 GP |
284 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) |
285 | { | |
286 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
287 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 288 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
d7175d55 GP |
289 | |
290 | BT_DBG("sock %p, sk %p", sock, sk); | |
291 | ||
292 | addr->sa_family = AF_BLUETOOTH; | |
293 | *len = sizeof(struct sockaddr_l2); | |
294 | ||
295 | if (peer) { | |
fe4128e0 | 296 | la->l2_psm = chan->psm; |
d7175d55 | 297 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
fe4128e0 | 298 | la->l2_cid = cpu_to_le16(chan->dcid); |
d7175d55 | 299 | } else { |
0c1bc5c6 | 300 | la->l2_psm = chan->sport; |
d7175d55 | 301 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
fe4128e0 | 302 | la->l2_cid = cpu_to_le16(chan->scid); |
d7175d55 GP |
303 | } |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
99f4808d GP |
308 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
309 | { | |
310 | struct sock *sk = sock->sk; | |
4343478f | 311 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d GP |
312 | struct l2cap_options opts; |
313 | struct l2cap_conninfo cinfo; | |
314 | int len, err = 0; | |
315 | u32 opt; | |
316 | ||
317 | BT_DBG("sk %p", sk); | |
318 | ||
319 | if (get_user(len, optlen)) | |
320 | return -EFAULT; | |
321 | ||
322 | lock_sock(sk); | |
323 | ||
324 | switch (optname) { | |
325 | case L2CAP_OPTIONS: | |
e3fb592b | 326 | memset(&opts, 0, sizeof(opts)); |
0c1bc5c6 GP |
327 | opts.imtu = chan->imtu; |
328 | opts.omtu = chan->omtu; | |
329 | opts.flush_to = chan->flush_to; | |
330 | opts.mode = chan->mode; | |
47d1ec61 GP |
331 | opts.fcs = chan->fcs; |
332 | opts.max_tx = chan->max_tx; | |
333 | opts.txwin_size = (__u16)chan->tx_win; | |
99f4808d GP |
334 | |
335 | len = min_t(unsigned int, len, sizeof(opts)); | |
336 | if (copy_to_user(optval, (char *) &opts, len)) | |
337 | err = -EFAULT; | |
338 | ||
339 | break; | |
340 | ||
341 | case L2CAP_LM: | |
4343478f | 342 | switch (chan->sec_level) { |
99f4808d GP |
343 | case BT_SECURITY_LOW: |
344 | opt = L2CAP_LM_AUTH; | |
345 | break; | |
346 | case BT_SECURITY_MEDIUM: | |
347 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
348 | break; | |
349 | case BT_SECURITY_HIGH: | |
350 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
351 | L2CAP_LM_SECURE; | |
352 | break; | |
353 | default: | |
354 | opt = 0; | |
355 | break; | |
356 | } | |
357 | ||
4343478f | 358 | if (chan->role_switch) |
99f4808d GP |
359 | opt |= L2CAP_LM_MASTER; |
360 | ||
4343478f | 361 | if (chan->force_reliable) |
99f4808d GP |
362 | opt |= L2CAP_LM_RELIABLE; |
363 | ||
364 | if (put_user(opt, (u32 __user *) optval)) | |
365 | err = -EFAULT; | |
366 | break; | |
367 | ||
368 | case L2CAP_CONNINFO: | |
369 | if (sk->sk_state != BT_CONNECTED && | |
370 | !(sk->sk_state == BT_CONNECT2 && | |
371 | bt_sk(sk)->defer_setup)) { | |
372 | err = -ENOTCONN; | |
373 | break; | |
374 | } | |
375 | ||
8d03e971 | 376 | memset(&cinfo, 0, sizeof(cinfo)); |
8c1d787b GP |
377 | cinfo.hci_handle = chan->conn->hcon->handle; |
378 | memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); | |
99f4808d GP |
379 | |
380 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
381 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
382 | err = -EFAULT; | |
383 | ||
384 | break; | |
385 | ||
386 | default: | |
387 | err = -ENOPROTOOPT; | |
388 | break; | |
389 | } | |
390 | ||
391 | release_sock(sk); | |
392 | return err; | |
393 | } | |
394 | ||
395 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
396 | { | |
397 | struct sock *sk = sock->sk; | |
4343478f | 398 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d | 399 | struct bt_security sec; |
14b12d0b | 400 | struct bt_power pwr; |
99f4808d GP |
401 | int len, err = 0; |
402 | ||
403 | BT_DBG("sk %p", sk); | |
404 | ||
405 | if (level == SOL_L2CAP) | |
406 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
407 | ||
408 | if (level != SOL_BLUETOOTH) | |
409 | return -ENOPROTOOPT; | |
410 | ||
411 | if (get_user(len, optlen)) | |
412 | return -EFAULT; | |
413 | ||
414 | lock_sock(sk); | |
415 | ||
416 | switch (optname) { | |
417 | case BT_SECURITY: | |
715ec005 GP |
418 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
419 | chan->chan_type != L2CAP_CHAN_RAW) { | |
99f4808d GP |
420 | err = -EINVAL; |
421 | break; | |
422 | } | |
423 | ||
4343478f | 424 | sec.level = chan->sec_level; |
99f4808d GP |
425 | |
426 | len = min_t(unsigned int, len, sizeof(sec)); | |
427 | if (copy_to_user(optval, (char *) &sec, len)) | |
428 | err = -EFAULT; | |
429 | ||
430 | break; | |
431 | ||
432 | case BT_DEFER_SETUP: | |
433 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
434 | err = -EINVAL; | |
435 | break; | |
436 | } | |
437 | ||
438 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
439 | err = -EFAULT; | |
440 | ||
441 | break; | |
442 | ||
443 | case BT_FLUSHABLE: | |
4343478f | 444 | if (put_user(chan->flushable, (u32 __user *) optval)) |
99f4808d GP |
445 | err = -EFAULT; |
446 | ||
447 | break; | |
448 | ||
14b12d0b JG |
449 | case BT_POWER: |
450 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
451 | && sk->sk_type != SOCK_RAW) { | |
452 | err = -EINVAL; | |
453 | break; | |
454 | } | |
455 | ||
456 | pwr.force_active = chan->force_active; | |
457 | ||
458 | len = min_t(unsigned int, len, sizeof(pwr)); | |
459 | if (copy_to_user(optval, (char *) &pwr, len)) | |
460 | err = -EFAULT; | |
461 | ||
462 | break; | |
463 | ||
99f4808d GP |
464 | default: |
465 | err = -ENOPROTOOPT; | |
466 | break; | |
467 | } | |
468 | ||
469 | release_sock(sk); | |
470 | return err; | |
471 | } | |
472 | ||
33575df7 GP |
473 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
474 | { | |
475 | struct sock *sk = sock->sk; | |
b4450035 | 476 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 GP |
477 | struct l2cap_options opts; |
478 | int len, err = 0; | |
479 | u32 opt; | |
480 | ||
481 | BT_DBG("sk %p", sk); | |
482 | ||
483 | lock_sock(sk); | |
484 | ||
485 | switch (optname) { | |
486 | case L2CAP_OPTIONS: | |
487 | if (sk->sk_state == BT_CONNECTED) { | |
488 | err = -EINVAL; | |
489 | break; | |
490 | } | |
491 | ||
0c1bc5c6 GP |
492 | opts.imtu = chan->imtu; |
493 | opts.omtu = chan->omtu; | |
494 | opts.flush_to = chan->flush_to; | |
495 | opts.mode = chan->mode; | |
47d1ec61 GP |
496 | opts.fcs = chan->fcs; |
497 | opts.max_tx = chan->max_tx; | |
498 | opts.txwin_size = (__u16)chan->tx_win; | |
33575df7 GP |
499 | |
500 | len = min_t(unsigned int, sizeof(opts), optlen); | |
501 | if (copy_from_user((char *) &opts, optval, len)) { | |
502 | err = -EFAULT; | |
503 | break; | |
504 | } | |
505 | ||
506 | if (opts.txwin_size > L2CAP_DEFAULT_TX_WINDOW) { | |
507 | err = -EINVAL; | |
508 | break; | |
509 | } | |
510 | ||
0c1bc5c6 GP |
511 | chan->mode = opts.mode; |
512 | switch (chan->mode) { | |
33575df7 | 513 | case L2CAP_MODE_BASIC: |
b4450035 | 514 | chan->conf_state &= ~L2CAP_CONF_STATE2_DEVICE; |
33575df7 GP |
515 | break; |
516 | case L2CAP_MODE_ERTM: | |
517 | case L2CAP_MODE_STREAMING: | |
518 | if (!disable_ertm) | |
519 | break; | |
520 | /* fall through */ | |
521 | default: | |
522 | err = -EINVAL; | |
523 | break; | |
524 | } | |
525 | ||
0c1bc5c6 GP |
526 | chan->imtu = opts.imtu; |
527 | chan->omtu = opts.omtu; | |
47d1ec61 GP |
528 | chan->fcs = opts.fcs; |
529 | chan->max_tx = opts.max_tx; | |
530 | chan->tx_win = (__u8)opts.txwin_size; | |
33575df7 GP |
531 | break; |
532 | ||
533 | case L2CAP_LM: | |
534 | if (get_user(opt, (u32 __user *) optval)) { | |
535 | err = -EFAULT; | |
536 | break; | |
537 | } | |
538 | ||
539 | if (opt & L2CAP_LM_AUTH) | |
4343478f | 540 | chan->sec_level = BT_SECURITY_LOW; |
33575df7 | 541 | if (opt & L2CAP_LM_ENCRYPT) |
4343478f | 542 | chan->sec_level = BT_SECURITY_MEDIUM; |
33575df7 | 543 | if (opt & L2CAP_LM_SECURE) |
4343478f | 544 | chan->sec_level = BT_SECURITY_HIGH; |
33575df7 | 545 | |
4343478f GP |
546 | chan->role_switch = (opt & L2CAP_LM_MASTER); |
547 | chan->force_reliable = (opt & L2CAP_LM_RELIABLE); | |
33575df7 GP |
548 | break; |
549 | ||
550 | default: | |
551 | err = -ENOPROTOOPT; | |
552 | break; | |
553 | } | |
554 | ||
555 | release_sock(sk); | |
556 | return err; | |
557 | } | |
558 | ||
559 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) | |
560 | { | |
561 | struct sock *sk = sock->sk; | |
4343478f | 562 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 | 563 | struct bt_security sec; |
14b12d0b | 564 | struct bt_power pwr; |
33575df7 GP |
565 | int len, err = 0; |
566 | u32 opt; | |
567 | ||
568 | BT_DBG("sk %p", sk); | |
569 | ||
570 | if (level == SOL_L2CAP) | |
571 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
572 | ||
573 | if (level != SOL_BLUETOOTH) | |
574 | return -ENOPROTOOPT; | |
575 | ||
576 | lock_sock(sk); | |
577 | ||
578 | switch (optname) { | |
579 | case BT_SECURITY: | |
715ec005 GP |
580 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
581 | chan->chan_type != L2CAP_CHAN_RAW) { | |
33575df7 GP |
582 | err = -EINVAL; |
583 | break; | |
584 | } | |
585 | ||
586 | sec.level = BT_SECURITY_LOW; | |
587 | ||
588 | len = min_t(unsigned int, sizeof(sec), optlen); | |
589 | if (copy_from_user((char *) &sec, optval, len)) { | |
590 | err = -EFAULT; | |
591 | break; | |
592 | } | |
593 | ||
594 | if (sec.level < BT_SECURITY_LOW || | |
595 | sec.level > BT_SECURITY_HIGH) { | |
596 | err = -EINVAL; | |
597 | break; | |
598 | } | |
599 | ||
4343478f | 600 | chan->sec_level = sec.level; |
33575df7 GP |
601 | break; |
602 | ||
603 | case BT_DEFER_SETUP: | |
604 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
605 | err = -EINVAL; | |
606 | break; | |
607 | } | |
608 | ||
609 | if (get_user(opt, (u32 __user *) optval)) { | |
610 | err = -EFAULT; | |
611 | break; | |
612 | } | |
613 | ||
614 | bt_sk(sk)->defer_setup = opt; | |
615 | break; | |
616 | ||
617 | case BT_FLUSHABLE: | |
618 | if (get_user(opt, (u32 __user *) optval)) { | |
619 | err = -EFAULT; | |
620 | break; | |
621 | } | |
622 | ||
623 | if (opt > BT_FLUSHABLE_ON) { | |
624 | err = -EINVAL; | |
625 | break; | |
626 | } | |
627 | ||
628 | if (opt == BT_FLUSHABLE_OFF) { | |
8c1d787b | 629 | struct l2cap_conn *conn = chan->conn; |
25985edc | 630 | /* proceed further only when we have l2cap_conn and |
33575df7 GP |
631 | No Flush support in the LM */ |
632 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { | |
633 | err = -EINVAL; | |
634 | break; | |
635 | } | |
636 | } | |
637 | ||
4343478f | 638 | chan->flushable = opt; |
33575df7 GP |
639 | break; |
640 | ||
14b12d0b JG |
641 | case BT_POWER: |
642 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && | |
643 | chan->chan_type != L2CAP_CHAN_RAW) { | |
644 | err = -EINVAL; | |
645 | break; | |
646 | } | |
647 | ||
648 | pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; | |
649 | ||
650 | len = min_t(unsigned int, sizeof(pwr), optlen); | |
651 | if (copy_from_user((char *) &pwr, optval, len)) { | |
652 | err = -EFAULT; | |
653 | break; | |
654 | } | |
655 | chan->force_active = pwr.force_active; | |
656 | break; | |
657 | ||
33575df7 GP |
658 | default: |
659 | err = -ENOPROTOOPT; | |
660 | break; | |
661 | } | |
662 | ||
663 | release_sock(sk); | |
664 | return err; | |
665 | } | |
fd83ccdb GP |
666 | |
667 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) | |
668 | { | |
669 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 670 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb GP |
671 | int err; |
672 | ||
673 | BT_DBG("sock %p, sk %p", sock, sk); | |
674 | ||
675 | err = sock_error(sk); | |
676 | if (err) | |
677 | return err; | |
678 | ||
679 | if (msg->msg_flags & MSG_OOB) | |
680 | return -EOPNOTSUPP; | |
681 | ||
682 | lock_sock(sk); | |
683 | ||
684 | if (sk->sk_state != BT_CONNECTED) { | |
9a91a04a GP |
685 | release_sock(sk); |
686 | return -ENOTCONN; | |
fd83ccdb GP |
687 | } |
688 | ||
9a91a04a | 689 | err = l2cap_chan_send(chan, msg, len); |
fd83ccdb | 690 | |
fd83ccdb GP |
691 | release_sock(sk); |
692 | return err; | |
693 | } | |
33575df7 | 694 | |
68983259 GP |
695 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
696 | { | |
697 | struct sock *sk = sock->sk; | |
698 | ||
699 | lock_sock(sk); | |
700 | ||
701 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { | |
8c1d787b GP |
702 | sk->sk_state = BT_CONFIG; |
703 | ||
704 | __l2cap_connect_rsp_defer(l2cap_pi(sk)->chan); | |
68983259 GP |
705 | release_sock(sk); |
706 | return 0; | |
707 | } | |
708 | ||
709 | release_sock(sk); | |
710 | ||
711 | if (sock->type == SOCK_STREAM) | |
712 | return bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); | |
713 | ||
714 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
715 | } | |
716 | ||
05fc1576 GP |
717 | /* Kill socket (only if zapped and orphan) |
718 | * Must be called on unlocked socket. | |
719 | */ | |
ba3bd0ee | 720 | static void l2cap_sock_kill(struct sock *sk) |
05fc1576 GP |
721 | { |
722 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
723 | return; | |
724 | ||
725 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
726 | ||
727 | /* Kill poor orphan */ | |
6ff5abbf | 728 | |
23691d75 | 729 | l2cap_chan_destroy(l2cap_pi(sk)->chan); |
05fc1576 GP |
730 | sock_set_flag(sk, SOCK_DEAD); |
731 | sock_put(sk); | |
732 | } | |
733 | ||
dcba0dba GP |
734 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
735 | { | |
736 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 737 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
dcba0dba GP |
738 | int err = 0; |
739 | ||
740 | BT_DBG("sock %p, sk %p", sock, sk); | |
741 | ||
742 | if (!sk) | |
743 | return 0; | |
744 | ||
745 | lock_sock(sk); | |
746 | if (!sk->sk_shutdown) { | |
0c1bc5c6 | 747 | if (chan->mode == L2CAP_MODE_ERTM) |
dcba0dba GP |
748 | err = __l2cap_wait_ack(sk); |
749 | ||
750 | sk->sk_shutdown = SHUTDOWN_MASK; | |
0f852724 | 751 | l2cap_chan_close(chan, 0); |
dcba0dba GP |
752 | |
753 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
754 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
755 | sk->sk_lingertime); | |
756 | } | |
757 | ||
758 | if (!err && sk->sk_err) | |
759 | err = -sk->sk_err; | |
760 | ||
761 | release_sock(sk); | |
762 | return err; | |
763 | } | |
764 | ||
554f05bb GP |
765 | static int l2cap_sock_release(struct socket *sock) |
766 | { | |
767 | struct sock *sk = sock->sk; | |
768 | int err; | |
769 | ||
770 | BT_DBG("sock %p, sk %p", sock, sk); | |
771 | ||
772 | if (!sk) | |
773 | return 0; | |
774 | ||
775 | err = l2cap_sock_shutdown(sock, 2); | |
776 | ||
777 | sock_orphan(sk); | |
778 | l2cap_sock_kill(sk); | |
779 | return err; | |
780 | } | |
781 | ||
80808e43 GP |
782 | static struct l2cap_chan *l2cap_sock_new_connection_cb(void *data) |
783 | { | |
784 | struct sock *sk, *parent = data; | |
785 | ||
786 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, | |
787 | GFP_ATOMIC); | |
788 | if (!sk) | |
789 | return NULL; | |
790 | ||
791 | l2cap_sock_init(sk, parent); | |
792 | ||
793 | return l2cap_pi(sk)->chan; | |
794 | } | |
795 | ||
23070494 GP |
796 | static int l2cap_sock_recv_cb(void *data, struct sk_buff *skb) |
797 | { | |
798 | struct sock *sk = data; | |
799 | ||
800 | return sock_queue_rcv_skb(sk, skb); | |
801 | } | |
802 | ||
ba3bd0ee GP |
803 | static void l2cap_sock_close_cb(void *data) |
804 | { | |
805 | struct sock *sk = data; | |
806 | ||
807 | l2cap_sock_kill(sk); | |
808 | } | |
809 | ||
89bc500e GP |
810 | static void l2cap_sock_state_change_cb(void *data, int state) |
811 | { | |
812 | struct sock *sk = data; | |
813 | ||
814 | sk->sk_state = state; | |
815 | } | |
816 | ||
80808e43 GP |
817 | static struct l2cap_ops l2cap_chan_ops = { |
818 | .name = "L2CAP Socket Interface", | |
819 | .new_connection = l2cap_sock_new_connection_cb, | |
23070494 | 820 | .recv = l2cap_sock_recv_cb, |
ba3bd0ee | 821 | .close = l2cap_sock_close_cb, |
89bc500e | 822 | .state_change = l2cap_sock_state_change_cb, |
80808e43 GP |
823 | }; |
824 | ||
bb58f747 GP |
825 | static void l2cap_sock_destruct(struct sock *sk) |
826 | { | |
827 | BT_DBG("sk %p", sk); | |
828 | ||
829 | skb_queue_purge(&sk->sk_receive_queue); | |
830 | skb_queue_purge(&sk->sk_write_queue); | |
831 | } | |
832 | ||
80808e43 | 833 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747 GP |
834 | { |
835 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
b4450035 | 836 | struct l2cap_chan *chan = pi->chan; |
bb58f747 GP |
837 | |
838 | BT_DBG("sk %p", sk); | |
839 | ||
840 | if (parent) { | |
b4450035 GP |
841 | struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
842 | ||
bb58f747 GP |
843 | sk->sk_type = parent->sk_type; |
844 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; | |
845 | ||
715ec005 | 846 | chan->chan_type = pchan->chan_type; |
0c1bc5c6 GP |
847 | chan->imtu = pchan->imtu; |
848 | chan->omtu = pchan->omtu; | |
b4450035 | 849 | chan->conf_state = pchan->conf_state; |
0c1bc5c6 | 850 | chan->mode = pchan->mode; |
47d1ec61 GP |
851 | chan->fcs = pchan->fcs; |
852 | chan->max_tx = pchan->max_tx; | |
853 | chan->tx_win = pchan->tx_win; | |
4343478f GP |
854 | chan->sec_level = pchan->sec_level; |
855 | chan->role_switch = pchan->role_switch; | |
856 | chan->force_reliable = pchan->force_reliable; | |
857 | chan->flushable = pchan->flushable; | |
14b12d0b | 858 | chan->force_active = pchan->force_active; |
bb58f747 | 859 | } else { |
715ec005 GP |
860 | |
861 | switch (sk->sk_type) { | |
862 | case SOCK_RAW: | |
863 | chan->chan_type = L2CAP_CHAN_RAW; | |
864 | break; | |
865 | case SOCK_DGRAM: | |
866 | chan->chan_type = L2CAP_CHAN_CONN_LESS; | |
867 | break; | |
868 | case SOCK_SEQPACKET: | |
869 | case SOCK_STREAM: | |
870 | chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; | |
871 | break; | |
872 | } | |
873 | ||
0c1bc5c6 GP |
874 | chan->imtu = L2CAP_DEFAULT_MTU; |
875 | chan->omtu = 0; | |
bb58f747 | 876 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c6 | 877 | chan->mode = L2CAP_MODE_ERTM; |
b4450035 | 878 | chan->conf_state |= L2CAP_CONF_STATE2_DEVICE; |
bb58f747 | 879 | } else { |
0c1bc5c6 | 880 | chan->mode = L2CAP_MODE_BASIC; |
bb58f747 | 881 | } |
47d1ec61 GP |
882 | chan->max_tx = L2CAP_DEFAULT_MAX_TX; |
883 | chan->fcs = L2CAP_FCS_CRC16; | |
884 | chan->tx_win = L2CAP_DEFAULT_TX_WINDOW; | |
4343478f GP |
885 | chan->sec_level = BT_SECURITY_LOW; |
886 | chan->role_switch = 0; | |
887 | chan->force_reliable = 0; | |
888 | chan->flushable = BT_FLUSHABLE_OFF; | |
14b12d0b | 889 | chan->force_active = BT_POWER_FORCE_ACTIVE_ON; |
80808e43 | 890 | |
bb58f747 GP |
891 | } |
892 | ||
893 | /* Default config options */ | |
0c1bc5c6 | 894 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e43 GP |
895 | |
896 | chan->data = sk; | |
897 | chan->ops = &l2cap_chan_ops; | |
bb58f747 GP |
898 | } |
899 | ||
900 | static struct proto l2cap_proto = { | |
901 | .name = "L2CAP", | |
902 | .owner = THIS_MODULE, | |
903 | .obj_size = sizeof(struct l2cap_pinfo) | |
904 | }; | |
905 | ||
80808e43 | 906 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
bb58f747 GP |
907 | { |
908 | struct sock *sk; | |
dc50a06d | 909 | struct l2cap_chan *chan; |
bb58f747 GP |
910 | |
911 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); | |
912 | if (!sk) | |
913 | return NULL; | |
914 | ||
915 | sock_init_data(sock, sk); | |
916 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
917 | ||
918 | sk->sk_destruct = l2cap_sock_destruct; | |
919 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); | |
920 | ||
921 | sock_reset_flag(sk, SOCK_ZAPPED); | |
922 | ||
923 | sk->sk_protocol = proto; | |
924 | sk->sk_state = BT_OPEN; | |
925 | ||
dc50a06d GP |
926 | chan = l2cap_chan_create(sk); |
927 | if (!chan) { | |
928 | l2cap_sock_kill(sk); | |
929 | return NULL; | |
930 | } | |
931 | ||
932 | l2cap_pi(sk)->chan = chan; | |
933 | ||
bb58f747 GP |
934 | return sk; |
935 | } | |
936 | ||
937 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
938 | int kern) | |
939 | { | |
940 | struct sock *sk; | |
941 | ||
942 | BT_DBG("sock %p", sock); | |
943 | ||
944 | sock->state = SS_UNCONNECTED; | |
945 | ||
946 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
947 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
948 | return -ESOCKTNOSUPPORT; | |
949 | ||
950 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
951 | return -EPERM; | |
952 | ||
953 | sock->ops = &l2cap_sock_ops; | |
954 | ||
955 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); | |
956 | if (!sk) | |
957 | return -ENOMEM; | |
958 | ||
959 | l2cap_sock_init(sk, NULL); | |
960 | return 0; | |
961 | } | |
962 | ||
cf2f90f5 | 963 | static const struct proto_ops l2cap_sock_ops = { |
65390587 GP |
964 | .family = PF_BLUETOOTH, |
965 | .owner = THIS_MODULE, | |
966 | .release = l2cap_sock_release, | |
967 | .bind = l2cap_sock_bind, | |
968 | .connect = l2cap_sock_connect, | |
969 | .listen = l2cap_sock_listen, | |
970 | .accept = l2cap_sock_accept, | |
971 | .getname = l2cap_sock_getname, | |
972 | .sendmsg = l2cap_sock_sendmsg, | |
973 | .recvmsg = l2cap_sock_recvmsg, | |
974 | .poll = bt_sock_poll, | |
975 | .ioctl = bt_sock_ioctl, | |
976 | .mmap = sock_no_mmap, | |
977 | .socketpair = sock_no_socketpair, | |
978 | .shutdown = l2cap_sock_shutdown, | |
979 | .setsockopt = l2cap_sock_setsockopt, | |
980 | .getsockopt = l2cap_sock_getsockopt | |
981 | }; | |
982 | ||
bb58f747 GP |
983 | static const struct net_proto_family l2cap_sock_family_ops = { |
984 | .family = PF_BLUETOOTH, | |
985 | .owner = THIS_MODULE, | |
986 | .create = l2cap_sock_create, | |
987 | }; | |
988 | ||
989 | int __init l2cap_init_sockets(void) | |
990 | { | |
e2174ca4 | 991 | int err; |
bb58f747 | 992 | |
e2174ca4 GP |
993 | err = proto_register(&l2cap_proto, 0); |
994 | if (err < 0) | |
995 | return err; | |
bb58f747 | 996 | |
e2174ca4 GP |
997 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
998 | if (err < 0) | |
999 | goto error; | |
bb58f747 | 1000 | |
e2174ca4 | 1001 | BT_INFO("L2CAP socket layer initialized"); |
bb58f747 | 1002 | |
e2174ca4 | 1003 | return 0; |
bb58f747 GP |
1004 | |
1005 | error: | |
e2174ca4 GP |
1006 | BT_ERR("L2CAP socket registration failed"); |
1007 | proto_unregister(&l2cap_proto); | |
1008 | return err; | |
bb58f747 GP |
1009 | } |
1010 | ||
1011 | void l2cap_cleanup_sockets(void) | |
1012 | { | |
e2174ca4 GP |
1013 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) |
1014 | BT_ERR("L2CAP socket unregistration failed"); | |
bb58f747 | 1015 | |
e2174ca4 | 1016 | proto_unregister(&l2cap_proto); |
bb58f747 | 1017 | } |