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 | ||
33 | static void l2cap_sock_timeout(unsigned long arg) | |
34 | { | |
35 | struct sock *sk = (struct sock *) arg; | |
36 | int reason; | |
37 | ||
38 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
39 | ||
40 | bh_lock_sock(sk); | |
41 | ||
42 | if (sock_owned_by_user(sk)) { | |
43 | /* sk is owned by user. Try again later */ | |
44 | l2cap_sock_set_timer(sk, HZ / 5); | |
45 | bh_unlock_sock(sk); | |
46 | sock_put(sk); | |
47 | return; | |
48 | } | |
49 | ||
50 | if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) | |
51 | reason = ECONNREFUSED; | |
52 | else if (sk->sk_state == BT_CONNECT && | |
53 | l2cap_pi(sk)->sec_level != BT_SECURITY_SDP) | |
54 | reason = ECONNREFUSED; | |
55 | else | |
56 | reason = ETIMEDOUT; | |
57 | ||
58 | __l2cap_sock_close(sk, reason); | |
59 | ||
60 | bh_unlock_sock(sk); | |
61 | ||
62 | l2cap_sock_kill(sk); | |
63 | sock_put(sk); | |
64 | } | |
65 | ||
af6bcd82 GP |
66 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
67 | { | |
68 | struct sock *sk; | |
69 | struct hlist_node *node; | |
70 | sk_for_each(sk, node, &l2cap_sk_list.head) | |
71 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) | |
72 | goto found; | |
73 | sk = NULL; | |
74 | found: | |
75 | return sk; | |
76 | } | |
77 | ||
78 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) | |
79 | { | |
80 | struct sock *sk = sock->sk; | |
81 | struct sockaddr_l2 la; | |
82 | int len, err = 0; | |
83 | ||
84 | BT_DBG("sk %p", sk); | |
85 | ||
86 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
87 | return -EINVAL; | |
88 | ||
89 | memset(&la, 0, sizeof(la)); | |
90 | len = min_t(unsigned int, sizeof(la), alen); | |
91 | memcpy(&la, addr, len); | |
92 | ||
93 | if (la.l2_cid) | |
94 | return -EINVAL; | |
95 | ||
96 | lock_sock(sk); | |
97 | ||
98 | if (sk->sk_state != BT_OPEN) { | |
99 | err = -EBADFD; | |
100 | goto done; | |
101 | } | |
102 | ||
103 | if (la.l2_psm) { | |
104 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
105 | ||
106 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
107 | if ((psm & 0x0101) != 0x0001) { | |
108 | err = -EINVAL; | |
109 | goto done; | |
110 | } | |
111 | ||
112 | /* Restrict usage of well-known PSMs */ | |
113 | if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { | |
114 | err = -EACCES; | |
115 | goto done; | |
116 | } | |
117 | } | |
118 | ||
119 | write_lock_bh(&l2cap_sk_list.lock); | |
120 | ||
121 | if (la.l2_psm && __l2cap_get_sock_by_addr(la.l2_psm, &la.l2_bdaddr)) { | |
122 | err = -EADDRINUSE; | |
123 | } else { | |
124 | /* Save source address */ | |
125 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); | |
126 | l2cap_pi(sk)->psm = la.l2_psm; | |
127 | l2cap_pi(sk)->sport = la.l2_psm; | |
128 | sk->sk_state = BT_BOUND; | |
129 | ||
130 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || | |
131 | __le16_to_cpu(la.l2_psm) == 0x0003) | |
132 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; | |
133 | } | |
134 | ||
135 | write_unlock_bh(&l2cap_sk_list.lock); | |
136 | ||
137 | done: | |
138 | release_sock(sk); | |
139 | return err; | |
140 | } | |
141 | ||
4e34c50b GP |
142 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) |
143 | { | |
144 | struct sock *sk = sock->sk; | |
145 | struct sockaddr_l2 la; | |
146 | int len, err = 0; | |
147 | ||
148 | BT_DBG("sk %p", sk); | |
149 | ||
150 | if (!addr || alen < sizeof(addr->sa_family) || | |
151 | addr->sa_family != AF_BLUETOOTH) | |
152 | return -EINVAL; | |
153 | ||
154 | memset(&la, 0, sizeof(la)); | |
155 | len = min_t(unsigned int, sizeof(la), alen); | |
156 | memcpy(&la, addr, len); | |
157 | ||
158 | if (la.l2_cid) | |
159 | return -EINVAL; | |
160 | ||
161 | lock_sock(sk); | |
162 | ||
163 | if ((sk->sk_type == SOCK_SEQPACKET || sk->sk_type == SOCK_STREAM) | |
164 | && !la.l2_psm) { | |
165 | err = -EINVAL; | |
166 | goto done; | |
167 | } | |
168 | ||
169 | switch (l2cap_pi(sk)->mode) { | |
170 | case L2CAP_MODE_BASIC: | |
171 | break; | |
172 | case L2CAP_MODE_ERTM: | |
173 | case L2CAP_MODE_STREAMING: | |
174 | if (!disable_ertm) | |
175 | break; | |
176 | /* fall through */ | |
177 | default: | |
178 | err = -ENOTSUPP; | |
179 | goto done; | |
180 | } | |
181 | ||
182 | switch (sk->sk_state) { | |
183 | case BT_CONNECT: | |
184 | case BT_CONNECT2: | |
185 | case BT_CONFIG: | |
186 | /* Already connecting */ | |
187 | goto wait; | |
188 | ||
189 | case BT_CONNECTED: | |
190 | /* Already connected */ | |
191 | err = -EISCONN; | |
192 | goto done; | |
193 | ||
194 | case BT_OPEN: | |
195 | case BT_BOUND: | |
196 | /* Can connect */ | |
197 | break; | |
198 | ||
199 | default: | |
200 | err = -EBADFD; | |
201 | goto done; | |
202 | } | |
203 | ||
204 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
205 | if ((__le16_to_cpu(la.l2_psm) & 0x0101) != 0x0001 && | |
206 | sk->sk_type != SOCK_RAW) { | |
207 | err = -EINVAL; | |
208 | goto done; | |
209 | } | |
210 | ||
211 | /* Set destination address and psm */ | |
212 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); | |
213 | l2cap_pi(sk)->psm = la.l2_psm; | |
214 | ||
215 | err = l2cap_do_connect(sk); | |
216 | if (err) | |
217 | goto done; | |
218 | ||
219 | wait: | |
220 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
221 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
222 | done: | |
223 | release_sock(sk); | |
224 | return err; | |
225 | } | |
226 | ||
af6bcd82 GP |
227 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
228 | { | |
229 | struct sock *sk = sock->sk; | |
230 | int err = 0; | |
231 | ||
232 | BT_DBG("sk %p backlog %d", sk, backlog); | |
233 | ||
234 | lock_sock(sk); | |
235 | ||
236 | if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) | |
237 | || sk->sk_state != BT_BOUND) { | |
238 | err = -EBADFD; | |
239 | goto done; | |
240 | } | |
241 | ||
242 | switch (l2cap_pi(sk)->mode) { | |
243 | case L2CAP_MODE_BASIC: | |
244 | break; | |
245 | case L2CAP_MODE_ERTM: | |
246 | case L2CAP_MODE_STREAMING: | |
247 | if (!disable_ertm) | |
248 | break; | |
249 | /* fall through */ | |
250 | default: | |
251 | err = -ENOTSUPP; | |
252 | goto done; | |
253 | } | |
254 | ||
255 | if (!l2cap_pi(sk)->psm) { | |
256 | bdaddr_t *src = &bt_sk(sk)->src; | |
257 | u16 psm; | |
258 | ||
259 | err = -EINVAL; | |
260 | ||
261 | write_lock_bh(&l2cap_sk_list.lock); | |
262 | ||
263 | for (psm = 0x1001; psm < 0x1100; psm += 2) | |
264 | if (!__l2cap_get_sock_by_addr(cpu_to_le16(psm), src)) { | |
265 | l2cap_pi(sk)->psm = cpu_to_le16(psm); | |
266 | l2cap_pi(sk)->sport = cpu_to_le16(psm); | |
267 | err = 0; | |
268 | break; | |
269 | } | |
270 | ||
271 | write_unlock_bh(&l2cap_sk_list.lock); | |
272 | ||
273 | if (err < 0) | |
274 | goto done; | |
275 | } | |
276 | ||
277 | sk->sk_max_ack_backlog = backlog; | |
278 | sk->sk_ack_backlog = 0; | |
279 | sk->sk_state = BT_LISTEN; | |
280 | ||
281 | done: | |
282 | release_sock(sk); | |
283 | return err; | |
284 | } | |
285 | ||
c47b7c72 GP |
286 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) |
287 | { | |
288 | DECLARE_WAITQUEUE(wait, current); | |
289 | struct sock *sk = sock->sk, *nsk; | |
290 | long timeo; | |
291 | int err = 0; | |
292 | ||
293 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
294 | ||
295 | if (sk->sk_state != BT_LISTEN) { | |
296 | err = -EBADFD; | |
297 | goto done; | |
298 | } | |
299 | ||
300 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
301 | ||
302 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
303 | ||
304 | /* Wait for an incoming connection. (wake-one). */ | |
305 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
306 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { | |
307 | set_current_state(TASK_INTERRUPTIBLE); | |
308 | if (!timeo) { | |
309 | err = -EAGAIN; | |
310 | break; | |
311 | } | |
312 | ||
313 | release_sock(sk); | |
314 | timeo = schedule_timeout(timeo); | |
315 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
316 | ||
317 | if (sk->sk_state != BT_LISTEN) { | |
318 | err = -EBADFD; | |
319 | break; | |
320 | } | |
321 | ||
322 | if (signal_pending(current)) { | |
323 | err = sock_intr_errno(timeo); | |
324 | break; | |
325 | } | |
326 | } | |
327 | set_current_state(TASK_RUNNING); | |
328 | remove_wait_queue(sk_sleep(sk), &wait); | |
329 | ||
330 | if (err) | |
331 | goto done; | |
332 | ||
333 | newsock->state = SS_CONNECTED; | |
334 | ||
335 | BT_DBG("new socket %p", nsk); | |
336 | ||
337 | done: | |
338 | release_sock(sk); | |
339 | return err; | |
340 | } | |
341 | ||
d7175d55 GP |
342 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) |
343 | { | |
344 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
345 | struct sock *sk = sock->sk; | |
346 | ||
347 | BT_DBG("sock %p, sk %p", sock, sk); | |
348 | ||
349 | addr->sa_family = AF_BLUETOOTH; | |
350 | *len = sizeof(struct sockaddr_l2); | |
351 | ||
352 | if (peer) { | |
353 | la->l2_psm = l2cap_pi(sk)->psm; | |
354 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); | |
355 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
356 | } else { | |
357 | la->l2_psm = l2cap_pi(sk)->sport; | |
358 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); | |
359 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->scid); | |
360 | } | |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
99f4808d GP |
365 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
366 | { | |
367 | struct sock *sk = sock->sk; | |
368 | struct l2cap_options opts; | |
369 | struct l2cap_conninfo cinfo; | |
370 | int len, err = 0; | |
371 | u32 opt; | |
372 | ||
373 | BT_DBG("sk %p", sk); | |
374 | ||
375 | if (get_user(len, optlen)) | |
376 | return -EFAULT; | |
377 | ||
378 | lock_sock(sk); | |
379 | ||
380 | switch (optname) { | |
381 | case L2CAP_OPTIONS: | |
382 | opts.imtu = l2cap_pi(sk)->imtu; | |
383 | opts.omtu = l2cap_pi(sk)->omtu; | |
384 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
385 | opts.mode = l2cap_pi(sk)->mode; | |
386 | opts.fcs = l2cap_pi(sk)->fcs; | |
387 | opts.max_tx = l2cap_pi(sk)->max_tx; | |
388 | opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win; | |
389 | ||
390 | len = min_t(unsigned int, len, sizeof(opts)); | |
391 | if (copy_to_user(optval, (char *) &opts, len)) | |
392 | err = -EFAULT; | |
393 | ||
394 | break; | |
395 | ||
396 | case L2CAP_LM: | |
397 | switch (l2cap_pi(sk)->sec_level) { | |
398 | case BT_SECURITY_LOW: | |
399 | opt = L2CAP_LM_AUTH; | |
400 | break; | |
401 | case BT_SECURITY_MEDIUM: | |
402 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
403 | break; | |
404 | case BT_SECURITY_HIGH: | |
405 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
406 | L2CAP_LM_SECURE; | |
407 | break; | |
408 | default: | |
409 | opt = 0; | |
410 | break; | |
411 | } | |
412 | ||
413 | if (l2cap_pi(sk)->role_switch) | |
414 | opt |= L2CAP_LM_MASTER; | |
415 | ||
416 | if (l2cap_pi(sk)->force_reliable) | |
417 | opt |= L2CAP_LM_RELIABLE; | |
418 | ||
419 | if (put_user(opt, (u32 __user *) optval)) | |
420 | err = -EFAULT; | |
421 | break; | |
422 | ||
423 | case L2CAP_CONNINFO: | |
424 | if (sk->sk_state != BT_CONNECTED && | |
425 | !(sk->sk_state == BT_CONNECT2 && | |
426 | bt_sk(sk)->defer_setup)) { | |
427 | err = -ENOTCONN; | |
428 | break; | |
429 | } | |
430 | ||
431 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; | |
432 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); | |
433 | ||
434 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
435 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
436 | err = -EFAULT; | |
437 | ||
438 | break; | |
439 | ||
440 | default: | |
441 | err = -ENOPROTOOPT; | |
442 | break; | |
443 | } | |
444 | ||
445 | release_sock(sk); | |
446 | return err; | |
447 | } | |
448 | ||
449 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
450 | { | |
451 | struct sock *sk = sock->sk; | |
452 | struct bt_security sec; | |
453 | int len, err = 0; | |
454 | ||
455 | BT_DBG("sk %p", sk); | |
456 | ||
457 | if (level == SOL_L2CAP) | |
458 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
459 | ||
460 | if (level != SOL_BLUETOOTH) | |
461 | return -ENOPROTOOPT; | |
462 | ||
463 | if (get_user(len, optlen)) | |
464 | return -EFAULT; | |
465 | ||
466 | lock_sock(sk); | |
467 | ||
468 | switch (optname) { | |
469 | case BT_SECURITY: | |
470 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
471 | && sk->sk_type != SOCK_RAW) { | |
472 | err = -EINVAL; | |
473 | break; | |
474 | } | |
475 | ||
476 | sec.level = l2cap_pi(sk)->sec_level; | |
477 | ||
478 | len = min_t(unsigned int, len, sizeof(sec)); | |
479 | if (copy_to_user(optval, (char *) &sec, len)) | |
480 | err = -EFAULT; | |
481 | ||
482 | break; | |
483 | ||
484 | case BT_DEFER_SETUP: | |
485 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
486 | err = -EINVAL; | |
487 | break; | |
488 | } | |
489 | ||
490 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
491 | err = -EFAULT; | |
492 | ||
493 | break; | |
494 | ||
495 | case BT_FLUSHABLE: | |
496 | if (put_user(l2cap_pi(sk)->flushable, (u32 __user *) optval)) | |
497 | err = -EFAULT; | |
498 | ||
499 | break; | |
500 | ||
501 | default: | |
502 | err = -ENOPROTOOPT; | |
503 | break; | |
504 | } | |
505 | ||
506 | release_sock(sk); | |
507 | return err; | |
508 | } | |
509 | ||
33575df7 GP |
510 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
511 | { | |
512 | struct sock *sk = sock->sk; | |
513 | struct l2cap_options opts; | |
514 | int len, err = 0; | |
515 | u32 opt; | |
516 | ||
517 | BT_DBG("sk %p", sk); | |
518 | ||
519 | lock_sock(sk); | |
520 | ||
521 | switch (optname) { | |
522 | case L2CAP_OPTIONS: | |
523 | if (sk->sk_state == BT_CONNECTED) { | |
524 | err = -EINVAL; | |
525 | break; | |
526 | } | |
527 | ||
528 | opts.imtu = l2cap_pi(sk)->imtu; | |
529 | opts.omtu = l2cap_pi(sk)->omtu; | |
530 | opts.flush_to = l2cap_pi(sk)->flush_to; | |
531 | opts.mode = l2cap_pi(sk)->mode; | |
532 | opts.fcs = l2cap_pi(sk)->fcs; | |
533 | opts.max_tx = l2cap_pi(sk)->max_tx; | |
534 | opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win; | |
535 | ||
536 | len = min_t(unsigned int, sizeof(opts), optlen); | |
537 | if (copy_from_user((char *) &opts, optval, len)) { | |
538 | err = -EFAULT; | |
539 | break; | |
540 | } | |
541 | ||
542 | if (opts.txwin_size > L2CAP_DEFAULT_TX_WINDOW) { | |
543 | err = -EINVAL; | |
544 | break; | |
545 | } | |
546 | ||
547 | l2cap_pi(sk)->mode = opts.mode; | |
548 | switch (l2cap_pi(sk)->mode) { | |
549 | case L2CAP_MODE_BASIC: | |
550 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_STATE2_DEVICE; | |
551 | break; | |
552 | case L2CAP_MODE_ERTM: | |
553 | case L2CAP_MODE_STREAMING: | |
554 | if (!disable_ertm) | |
555 | break; | |
556 | /* fall through */ | |
557 | default: | |
558 | err = -EINVAL; | |
559 | break; | |
560 | } | |
561 | ||
562 | l2cap_pi(sk)->imtu = opts.imtu; | |
563 | l2cap_pi(sk)->omtu = opts.omtu; | |
564 | l2cap_pi(sk)->fcs = opts.fcs; | |
565 | l2cap_pi(sk)->max_tx = opts.max_tx; | |
566 | l2cap_pi(sk)->tx_win = (__u8)opts.txwin_size; | |
567 | break; | |
568 | ||
569 | case L2CAP_LM: | |
570 | if (get_user(opt, (u32 __user *) optval)) { | |
571 | err = -EFAULT; | |
572 | break; | |
573 | } | |
574 | ||
575 | if (opt & L2CAP_LM_AUTH) | |
576 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; | |
577 | if (opt & L2CAP_LM_ENCRYPT) | |
578 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; | |
579 | if (opt & L2CAP_LM_SECURE) | |
580 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; | |
581 | ||
582 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); | |
583 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); | |
584 | break; | |
585 | ||
586 | default: | |
587 | err = -ENOPROTOOPT; | |
588 | break; | |
589 | } | |
590 | ||
591 | release_sock(sk); | |
592 | return err; | |
593 | } | |
594 | ||
595 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) | |
596 | { | |
597 | struct sock *sk = sock->sk; | |
598 | struct bt_security sec; | |
599 | int len, err = 0; | |
600 | u32 opt; | |
601 | ||
602 | BT_DBG("sk %p", sk); | |
603 | ||
604 | if (level == SOL_L2CAP) | |
605 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
606 | ||
607 | if (level != SOL_BLUETOOTH) | |
608 | return -ENOPROTOOPT; | |
609 | ||
610 | lock_sock(sk); | |
611 | ||
612 | switch (optname) { | |
613 | case BT_SECURITY: | |
614 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
615 | && sk->sk_type != SOCK_RAW) { | |
616 | err = -EINVAL; | |
617 | break; | |
618 | } | |
619 | ||
620 | sec.level = BT_SECURITY_LOW; | |
621 | ||
622 | len = min_t(unsigned int, sizeof(sec), optlen); | |
623 | if (copy_from_user((char *) &sec, optval, len)) { | |
624 | err = -EFAULT; | |
625 | break; | |
626 | } | |
627 | ||
628 | if (sec.level < BT_SECURITY_LOW || | |
629 | sec.level > BT_SECURITY_HIGH) { | |
630 | err = -EINVAL; | |
631 | break; | |
632 | } | |
633 | ||
634 | l2cap_pi(sk)->sec_level = sec.level; | |
635 | break; | |
636 | ||
637 | case BT_DEFER_SETUP: | |
638 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
639 | err = -EINVAL; | |
640 | break; | |
641 | } | |
642 | ||
643 | if (get_user(opt, (u32 __user *) optval)) { | |
644 | err = -EFAULT; | |
645 | break; | |
646 | } | |
647 | ||
648 | bt_sk(sk)->defer_setup = opt; | |
649 | break; | |
650 | ||
651 | case BT_FLUSHABLE: | |
652 | if (get_user(opt, (u32 __user *) optval)) { | |
653 | err = -EFAULT; | |
654 | break; | |
655 | } | |
656 | ||
657 | if (opt > BT_FLUSHABLE_ON) { | |
658 | err = -EINVAL; | |
659 | break; | |
660 | } | |
661 | ||
662 | if (opt == BT_FLUSHABLE_OFF) { | |
663 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
664 | /* proceed futher only when we have l2cap_conn and | |
665 | No Flush support in the LM */ | |
666 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { | |
667 | err = -EINVAL; | |
668 | break; | |
669 | } | |
670 | } | |
671 | ||
672 | l2cap_pi(sk)->flushable = opt; | |
673 | break; | |
674 | ||
675 | default: | |
676 | err = -ENOPROTOOPT; | |
677 | break; | |
678 | } | |
679 | ||
680 | release_sock(sk); | |
681 | return err; | |
682 | } | |
683 | ||
68983259 GP |
684 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
685 | { | |
686 | struct sock *sk = sock->sk; | |
687 | ||
688 | lock_sock(sk); | |
689 | ||
690 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { | |
691 | struct l2cap_conn_rsp rsp; | |
692 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; | |
693 | u8 buf[128]; | |
694 | ||
695 | sk->sk_state = BT_CONFIG; | |
696 | ||
697 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); | |
698 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); | |
699 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); | |
700 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); | |
701 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, | |
702 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); | |
703 | ||
704 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT) { | |
705 | release_sock(sk); | |
706 | return 0; | |
707 | } | |
708 | ||
709 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; | |
710 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, | |
711 | l2cap_build_conf_req(sk, buf), buf); | |
712 | l2cap_pi(sk)->num_conf_req++; | |
713 | ||
714 | release_sock(sk); | |
715 | return 0; | |
716 | } | |
717 | ||
718 | release_sock(sk); | |
719 | ||
720 | if (sock->type == SOCK_STREAM) | |
721 | return bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); | |
722 | ||
723 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
724 | } | |
725 | ||
dcba0dba GP |
726 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
727 | { | |
728 | struct sock *sk = sock->sk; | |
729 | int err = 0; | |
730 | ||
731 | BT_DBG("sock %p, sk %p", sock, sk); | |
732 | ||
733 | if (!sk) | |
734 | return 0; | |
735 | ||
736 | lock_sock(sk); | |
737 | if (!sk->sk_shutdown) { | |
738 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) | |
739 | err = __l2cap_wait_ack(sk); | |
740 | ||
741 | sk->sk_shutdown = SHUTDOWN_MASK; | |
742 | l2cap_sock_clear_timer(sk); | |
743 | __l2cap_sock_close(sk, 0); | |
744 | ||
745 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
746 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
747 | sk->sk_lingertime); | |
748 | } | |
749 | ||
750 | if (!err && sk->sk_err) | |
751 | err = -sk->sk_err; | |
752 | ||
753 | release_sock(sk); | |
754 | return err; | |
755 | } | |
756 | ||
554f05bb GP |
757 | static int l2cap_sock_release(struct socket *sock) |
758 | { | |
759 | struct sock *sk = sock->sk; | |
760 | int err; | |
761 | ||
762 | BT_DBG("sock %p, sk %p", sock, sk); | |
763 | ||
764 | if (!sk) | |
765 | return 0; | |
766 | ||
767 | err = l2cap_sock_shutdown(sock, 2); | |
768 | ||
769 | sock_orphan(sk); | |
770 | l2cap_sock_kill(sk); | |
771 | return err; | |
772 | } | |
773 | ||
bb58f747 GP |
774 | static void l2cap_sock_destruct(struct sock *sk) |
775 | { | |
776 | BT_DBG("sk %p", sk); | |
777 | ||
778 | skb_queue_purge(&sk->sk_receive_queue); | |
779 | skb_queue_purge(&sk->sk_write_queue); | |
780 | } | |
781 | ||
782 | void l2cap_sock_init(struct sock *sk, struct sock *parent) | |
783 | { | |
784 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
785 | ||
786 | BT_DBG("sk %p", sk); | |
787 | ||
788 | if (parent) { | |
789 | sk->sk_type = parent->sk_type; | |
790 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; | |
791 | ||
792 | pi->imtu = l2cap_pi(parent)->imtu; | |
793 | pi->omtu = l2cap_pi(parent)->omtu; | |
794 | pi->conf_state = l2cap_pi(parent)->conf_state; | |
795 | pi->mode = l2cap_pi(parent)->mode; | |
796 | pi->fcs = l2cap_pi(parent)->fcs; | |
797 | pi->max_tx = l2cap_pi(parent)->max_tx; | |
798 | pi->tx_win = l2cap_pi(parent)->tx_win; | |
799 | pi->sec_level = l2cap_pi(parent)->sec_level; | |
800 | pi->role_switch = l2cap_pi(parent)->role_switch; | |
801 | pi->force_reliable = l2cap_pi(parent)->force_reliable; | |
802 | pi->flushable = l2cap_pi(parent)->flushable; | |
803 | } else { | |
804 | pi->imtu = L2CAP_DEFAULT_MTU; | |
805 | pi->omtu = 0; | |
806 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { | |
807 | pi->mode = L2CAP_MODE_ERTM; | |
808 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; | |
809 | } else { | |
810 | pi->mode = L2CAP_MODE_BASIC; | |
811 | } | |
812 | pi->max_tx = L2CAP_DEFAULT_MAX_TX; | |
813 | pi->fcs = L2CAP_FCS_CRC16; | |
814 | pi->tx_win = L2CAP_DEFAULT_TX_WINDOW; | |
815 | pi->sec_level = BT_SECURITY_LOW; | |
816 | pi->role_switch = 0; | |
817 | pi->force_reliable = 0; | |
818 | pi->flushable = BT_FLUSHABLE_OFF; | |
819 | } | |
820 | ||
821 | /* Default config options */ | |
822 | pi->conf_len = 0; | |
823 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; | |
824 | skb_queue_head_init(TX_QUEUE(sk)); | |
825 | skb_queue_head_init(SREJ_QUEUE(sk)); | |
826 | skb_queue_head_init(BUSY_QUEUE(sk)); | |
827 | INIT_LIST_HEAD(SREJ_LIST(sk)); | |
828 | } | |
829 | ||
830 | static struct proto l2cap_proto = { | |
831 | .name = "L2CAP", | |
832 | .owner = THIS_MODULE, | |
833 | .obj_size = sizeof(struct l2cap_pinfo) | |
834 | }; | |
835 | ||
836 | struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) | |
837 | { | |
838 | struct sock *sk; | |
839 | ||
840 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); | |
841 | if (!sk) | |
842 | return NULL; | |
843 | ||
844 | sock_init_data(sock, sk); | |
845 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
846 | ||
847 | sk->sk_destruct = l2cap_sock_destruct; | |
848 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); | |
849 | ||
850 | sock_reset_flag(sk, SOCK_ZAPPED); | |
851 | ||
852 | sk->sk_protocol = proto; | |
853 | sk->sk_state = BT_OPEN; | |
854 | ||
855 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); | |
856 | ||
857 | bt_sock_link(&l2cap_sk_list, sk); | |
858 | return sk; | |
859 | } | |
860 | ||
861 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
862 | int kern) | |
863 | { | |
864 | struct sock *sk; | |
865 | ||
866 | BT_DBG("sock %p", sock); | |
867 | ||
868 | sock->state = SS_UNCONNECTED; | |
869 | ||
870 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
871 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
872 | return -ESOCKTNOSUPPORT; | |
873 | ||
874 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
875 | return -EPERM; | |
876 | ||
877 | sock->ops = &l2cap_sock_ops; | |
878 | ||
879 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); | |
880 | if (!sk) | |
881 | return -ENOMEM; | |
882 | ||
883 | l2cap_sock_init(sk, NULL); | |
884 | return 0; | |
885 | } | |
886 | ||
65390587 GP |
887 | const struct proto_ops l2cap_sock_ops = { |
888 | .family = PF_BLUETOOTH, | |
889 | .owner = THIS_MODULE, | |
890 | .release = l2cap_sock_release, | |
891 | .bind = l2cap_sock_bind, | |
892 | .connect = l2cap_sock_connect, | |
893 | .listen = l2cap_sock_listen, | |
894 | .accept = l2cap_sock_accept, | |
895 | .getname = l2cap_sock_getname, | |
896 | .sendmsg = l2cap_sock_sendmsg, | |
897 | .recvmsg = l2cap_sock_recvmsg, | |
898 | .poll = bt_sock_poll, | |
899 | .ioctl = bt_sock_ioctl, | |
900 | .mmap = sock_no_mmap, | |
901 | .socketpair = sock_no_socketpair, | |
902 | .shutdown = l2cap_sock_shutdown, | |
903 | .setsockopt = l2cap_sock_setsockopt, | |
904 | .getsockopt = l2cap_sock_getsockopt | |
905 | }; | |
906 | ||
bb58f747 GP |
907 | static const struct net_proto_family l2cap_sock_family_ops = { |
908 | .family = PF_BLUETOOTH, | |
909 | .owner = THIS_MODULE, | |
910 | .create = l2cap_sock_create, | |
911 | }; | |
912 | ||
913 | int __init l2cap_init_sockets(void) | |
914 | { | |
915 | int err; | |
916 | ||
917 | err = proto_register(&l2cap_proto, 0); | |
918 | if (err < 0) | |
919 | return err; | |
920 | ||
921 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); | |
922 | if (err < 0) | |
923 | goto error; | |
924 | ||
925 | BT_INFO("L2CAP socket layer initialized"); | |
926 | ||
927 | return 0; | |
928 | ||
929 | error: | |
930 | BT_ERR("L2CAP socket registration failed"); | |
931 | proto_unregister(&l2cap_proto); | |
932 | return err; | |
933 | } | |
934 | ||
935 | void l2cap_cleanup_sockets(void) | |
936 | { | |
937 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) | |
938 | BT_ERR("L2CAP socket unregistration failed"); | |
939 | ||
940 | proto_unregister(&l2cap_proto); | |
941 | } |