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 | 31 | #include <net/bluetooth/l2cap.h> |
f1cb9af5 | 32 | #include <net/bluetooth/smp.h> |
bb58f747 | 33 | |
cf2f90f5 | 34 | static const struct proto_ops l2cap_sock_ops; |
80808e43 GP |
35 | static void l2cap_sock_init(struct sock *sk, struct sock *parent); |
36 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio); | |
cf2f90f5 | 37 | |
af6bcd82 GP |
38 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
39 | { | |
40 | struct sock *sk = sock->sk; | |
4343478f | 41 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
42 | struct sockaddr_l2 la; |
43 | int len, err = 0; | |
44 | ||
45 | BT_DBG("sk %p", sk); | |
46 | ||
47 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
48 | return -EINVAL; | |
49 | ||
50 | memset(&la, 0, sizeof(la)); | |
51 | len = min_t(unsigned int, sizeof(la), alen); | |
52 | memcpy(&la, addr, len); | |
53 | ||
b62f328b | 54 | if (la.l2_cid && la.l2_psm) |
af6bcd82 GP |
55 | return -EINVAL; |
56 | ||
57 | lock_sock(sk); | |
58 | ||
59 | if (sk->sk_state != BT_OPEN) { | |
60 | err = -EBADFD; | |
61 | goto done; | |
62 | } | |
63 | ||
64 | if (la.l2_psm) { | |
65 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
66 | ||
67 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
68 | if ((psm & 0x0101) != 0x0001) { | |
69 | err = -EINVAL; | |
70 | goto done; | |
71 | } | |
72 | ||
73 | /* Restrict usage of well-known PSMs */ | |
74 | if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { | |
75 | err = -EACCES; | |
76 | goto done; | |
77 | } | |
78 | } | |
79 | ||
9e4425ff GP |
80 | if (la.l2_cid) |
81 | err = l2cap_add_scid(chan, la.l2_cid); | |
82 | else | |
83 | err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm); | |
af6bcd82 | 84 | |
9e4425ff GP |
85 | if (err < 0) |
86 | goto done; | |
af6bcd82 | 87 | |
9e4425ff GP |
88 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || |
89 | __le16_to_cpu(la.l2_psm) == 0x0003) | |
90 | chan->sec_level = BT_SECURITY_SDP; | |
b62f328b | 91 | |
9e4425ff | 92 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
89bc500e GP |
93 | |
94 | chan->state = BT_BOUND; | |
9e4425ff | 95 | sk->sk_state = BT_BOUND; |
af6bcd82 GP |
96 | |
97 | done: | |
98 | release_sock(sk); | |
99 | return err; | |
100 | } | |
101 | ||
4e34c50b GP |
102 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) |
103 | { | |
104 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 105 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
4e34c50b GP |
106 | struct sockaddr_l2 la; |
107 | int len, err = 0; | |
108 | ||
109 | BT_DBG("sk %p", sk); | |
110 | ||
111 | if (!addr || alen < sizeof(addr->sa_family) || | |
112 | addr->sa_family != AF_BLUETOOTH) | |
113 | return -EINVAL; | |
114 | ||
115 | memset(&la, 0, sizeof(la)); | |
116 | len = min_t(unsigned int, sizeof(la), alen); | |
117 | memcpy(&la, addr, len); | |
118 | ||
acd7d370 | 119 | if (la.l2_cid && la.l2_psm) |
4e34c50b GP |
120 | return -EINVAL; |
121 | ||
122 | lock_sock(sk); | |
123 | ||
715ec005 | 124 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED |
acd7d370 | 125 | && !(la.l2_psm || la.l2_cid)) { |
4e34c50b GP |
126 | err = -EINVAL; |
127 | goto done; | |
128 | } | |
129 | ||
0c1bc5c6 | 130 | switch (chan->mode) { |
4e34c50b GP |
131 | case L2CAP_MODE_BASIC: |
132 | break; | |
133 | case L2CAP_MODE_ERTM: | |
134 | case L2CAP_MODE_STREAMING: | |
135 | if (!disable_ertm) | |
136 | break; | |
137 | /* fall through */ | |
138 | default: | |
139 | err = -ENOTSUPP; | |
140 | goto done; | |
141 | } | |
142 | ||
143 | switch (sk->sk_state) { | |
144 | case BT_CONNECT: | |
145 | case BT_CONNECT2: | |
146 | case BT_CONFIG: | |
147 | /* Already connecting */ | |
148 | goto wait; | |
149 | ||
150 | case BT_CONNECTED: | |
151 | /* Already connected */ | |
152 | err = -EISCONN; | |
153 | goto done; | |
154 | ||
155 | case BT_OPEN: | |
156 | case BT_BOUND: | |
157 | /* Can connect */ | |
158 | break; | |
159 | ||
160 | default: | |
161 | err = -EBADFD; | |
162 | goto done; | |
163 | } | |
164 | ||
165 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
715ec005 GP |
166 | if ((__le16_to_cpu(la.l2_psm) & 0x0101) != 0x0001 && !la.l2_cid && |
167 | chan->chan_type != L2CAP_CHAN_RAW) { | |
4e34c50b GP |
168 | err = -EINVAL; |
169 | goto done; | |
170 | } | |
171 | ||
172 | /* Set destination address and psm */ | |
173 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); | |
fe4128e0 GP |
174 | chan->psm = la.l2_psm; |
175 | chan->dcid = la.l2_cid; | |
4e34c50b | 176 | |
77a74c7e | 177 | err = l2cap_chan_connect(l2cap_pi(sk)->chan); |
4e34c50b GP |
178 | if (err) |
179 | goto done; | |
180 | ||
181 | wait: | |
182 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
183 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
184 | done: | |
185 | release_sock(sk); | |
186 | return err; | |
187 | } | |
188 | ||
af6bcd82 GP |
189 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
190 | { | |
191 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 192 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
193 | int err = 0; |
194 | ||
195 | BT_DBG("sk %p backlog %d", sk, backlog); | |
196 | ||
197 | lock_sock(sk); | |
198 | ||
199 | if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) | |
200 | || sk->sk_state != BT_BOUND) { | |
201 | err = -EBADFD; | |
202 | goto done; | |
203 | } | |
204 | ||
0c1bc5c6 | 205 | switch (chan->mode) { |
af6bcd82 GP |
206 | case L2CAP_MODE_BASIC: |
207 | break; | |
208 | case L2CAP_MODE_ERTM: | |
209 | case L2CAP_MODE_STREAMING: | |
210 | if (!disable_ertm) | |
211 | break; | |
212 | /* fall through */ | |
213 | default: | |
214 | err = -ENOTSUPP; | |
215 | goto done; | |
216 | } | |
217 | ||
af6bcd82 GP |
218 | sk->sk_max_ack_backlog = backlog; |
219 | sk->sk_ack_backlog = 0; | |
89bc500e GP |
220 | |
221 | chan->state = BT_LISTEN; | |
af6bcd82 GP |
222 | sk->sk_state = BT_LISTEN; |
223 | ||
224 | done: | |
225 | release_sock(sk); | |
226 | return err; | |
227 | } | |
228 | ||
c47b7c72 GP |
229 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) |
230 | { | |
231 | DECLARE_WAITQUEUE(wait, current); | |
232 | struct sock *sk = sock->sk, *nsk; | |
233 | long timeo; | |
234 | int err = 0; | |
235 | ||
236 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
237 | ||
238 | if (sk->sk_state != BT_LISTEN) { | |
239 | err = -EBADFD; | |
240 | goto done; | |
241 | } | |
242 | ||
243 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
244 | ||
245 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
246 | ||
247 | /* Wait for an incoming connection. (wake-one). */ | |
248 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
249 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { | |
250 | set_current_state(TASK_INTERRUPTIBLE); | |
251 | if (!timeo) { | |
252 | err = -EAGAIN; | |
253 | break; | |
254 | } | |
255 | ||
256 | release_sock(sk); | |
257 | timeo = schedule_timeout(timeo); | |
258 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
259 | ||
260 | if (sk->sk_state != BT_LISTEN) { | |
261 | err = -EBADFD; | |
262 | break; | |
263 | } | |
264 | ||
265 | if (signal_pending(current)) { | |
266 | err = sock_intr_errno(timeo); | |
267 | break; | |
268 | } | |
269 | } | |
270 | set_current_state(TASK_RUNNING); | |
271 | remove_wait_queue(sk_sleep(sk), &wait); | |
272 | ||
273 | if (err) | |
274 | goto done; | |
275 | ||
276 | newsock->state = SS_CONNECTED; | |
277 | ||
278 | BT_DBG("new socket %p", nsk); | |
279 | ||
280 | done: | |
281 | release_sock(sk); | |
282 | return err; | |
283 | } | |
284 | ||
d7175d55 GP |
285 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) |
286 | { | |
287 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
288 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 289 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
d7175d55 GP |
290 | |
291 | BT_DBG("sock %p, sk %p", sock, sk); | |
292 | ||
293 | addr->sa_family = AF_BLUETOOTH; | |
294 | *len = sizeof(struct sockaddr_l2); | |
295 | ||
296 | if (peer) { | |
fe4128e0 | 297 | la->l2_psm = chan->psm; |
d7175d55 | 298 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
fe4128e0 | 299 | la->l2_cid = cpu_to_le16(chan->dcid); |
d7175d55 | 300 | } else { |
0c1bc5c6 | 301 | la->l2_psm = chan->sport; |
d7175d55 | 302 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
fe4128e0 | 303 | la->l2_cid = cpu_to_le16(chan->scid); |
d7175d55 GP |
304 | } |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
99f4808d GP |
309 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
310 | { | |
311 | struct sock *sk = sock->sk; | |
4343478f | 312 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d GP |
313 | struct l2cap_options opts; |
314 | struct l2cap_conninfo cinfo; | |
315 | int len, err = 0; | |
316 | u32 opt; | |
317 | ||
318 | BT_DBG("sk %p", sk); | |
319 | ||
320 | if (get_user(len, optlen)) | |
321 | return -EFAULT; | |
322 | ||
323 | lock_sock(sk); | |
324 | ||
325 | switch (optname) { | |
326 | case L2CAP_OPTIONS: | |
e3fb592b | 327 | memset(&opts, 0, sizeof(opts)); |
0c1bc5c6 GP |
328 | opts.imtu = chan->imtu; |
329 | opts.omtu = chan->omtu; | |
330 | opts.flush_to = chan->flush_to; | |
331 | opts.mode = chan->mode; | |
47d1ec61 GP |
332 | opts.fcs = chan->fcs; |
333 | opts.max_tx = chan->max_tx; | |
334 | opts.txwin_size = (__u16)chan->tx_win; | |
99f4808d GP |
335 | |
336 | len = min_t(unsigned int, len, sizeof(opts)); | |
337 | if (copy_to_user(optval, (char *) &opts, len)) | |
338 | err = -EFAULT; | |
339 | ||
340 | break; | |
341 | ||
342 | case L2CAP_LM: | |
4343478f | 343 | switch (chan->sec_level) { |
99f4808d GP |
344 | case BT_SECURITY_LOW: |
345 | opt = L2CAP_LM_AUTH; | |
346 | break; | |
347 | case BT_SECURITY_MEDIUM: | |
348 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
349 | break; | |
350 | case BT_SECURITY_HIGH: | |
351 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
352 | L2CAP_LM_SECURE; | |
353 | break; | |
354 | default: | |
355 | opt = 0; | |
356 | break; | |
357 | } | |
358 | ||
4343478f | 359 | if (chan->role_switch) |
99f4808d GP |
360 | opt |= L2CAP_LM_MASTER; |
361 | ||
4343478f | 362 | if (chan->force_reliable) |
99f4808d GP |
363 | opt |= L2CAP_LM_RELIABLE; |
364 | ||
365 | if (put_user(opt, (u32 __user *) optval)) | |
366 | err = -EFAULT; | |
367 | break; | |
368 | ||
369 | case L2CAP_CONNINFO: | |
370 | if (sk->sk_state != BT_CONNECTED && | |
371 | !(sk->sk_state == BT_CONNECT2 && | |
372 | bt_sk(sk)->defer_setup)) { | |
373 | err = -ENOTCONN; | |
374 | break; | |
375 | } | |
376 | ||
8d03e971 | 377 | memset(&cinfo, 0, sizeof(cinfo)); |
8c1d787b GP |
378 | cinfo.hci_handle = chan->conn->hcon->handle; |
379 | memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); | |
99f4808d GP |
380 | |
381 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
382 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
383 | err = -EFAULT; | |
384 | ||
385 | break; | |
386 | ||
387 | default: | |
388 | err = -ENOPROTOOPT; | |
389 | break; | |
390 | } | |
391 | ||
392 | release_sock(sk); | |
393 | return err; | |
394 | } | |
395 | ||
396 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
397 | { | |
398 | struct sock *sk = sock->sk; | |
4343478f | 399 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d | 400 | struct bt_security sec; |
14b12d0b | 401 | struct bt_power pwr; |
99f4808d GP |
402 | int len, err = 0; |
403 | ||
404 | BT_DBG("sk %p", sk); | |
405 | ||
406 | if (level == SOL_L2CAP) | |
407 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
408 | ||
409 | if (level != SOL_BLUETOOTH) | |
410 | return -ENOPROTOOPT; | |
411 | ||
412 | if (get_user(len, optlen)) | |
413 | return -EFAULT; | |
414 | ||
415 | lock_sock(sk); | |
416 | ||
417 | switch (optname) { | |
418 | case BT_SECURITY: | |
715ec005 GP |
419 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
420 | chan->chan_type != L2CAP_CHAN_RAW) { | |
99f4808d GP |
421 | err = -EINVAL; |
422 | break; | |
423 | } | |
424 | ||
4343478f | 425 | sec.level = chan->sec_level; |
99f4808d GP |
426 | |
427 | len = min_t(unsigned int, len, sizeof(sec)); | |
428 | if (copy_to_user(optval, (char *) &sec, len)) | |
429 | err = -EFAULT; | |
430 | ||
431 | break; | |
432 | ||
433 | case BT_DEFER_SETUP: | |
434 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
435 | err = -EINVAL; | |
436 | break; | |
437 | } | |
438 | ||
439 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
440 | err = -EFAULT; | |
441 | ||
442 | break; | |
443 | ||
444 | case BT_FLUSHABLE: | |
4343478f | 445 | if (put_user(chan->flushable, (u32 __user *) optval)) |
99f4808d GP |
446 | err = -EFAULT; |
447 | ||
448 | break; | |
449 | ||
14b12d0b JG |
450 | case BT_POWER: |
451 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
452 | && sk->sk_type != SOCK_RAW) { | |
453 | err = -EINVAL; | |
454 | break; | |
455 | } | |
456 | ||
457 | pwr.force_active = chan->force_active; | |
458 | ||
459 | len = min_t(unsigned int, len, sizeof(pwr)); | |
460 | if (copy_to_user(optval, (char *) &pwr, len)) | |
461 | err = -EFAULT; | |
462 | ||
463 | break; | |
464 | ||
99f4808d GP |
465 | default: |
466 | err = -ENOPROTOOPT; | |
467 | break; | |
468 | } | |
469 | ||
470 | release_sock(sk); | |
471 | return err; | |
472 | } | |
473 | ||
33575df7 GP |
474 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
475 | { | |
476 | struct sock *sk = sock->sk; | |
b4450035 | 477 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 GP |
478 | struct l2cap_options opts; |
479 | int len, err = 0; | |
480 | u32 opt; | |
481 | ||
482 | BT_DBG("sk %p", sk); | |
483 | ||
484 | lock_sock(sk); | |
485 | ||
486 | switch (optname) { | |
487 | case L2CAP_OPTIONS: | |
488 | if (sk->sk_state == BT_CONNECTED) { | |
489 | err = -EINVAL; | |
490 | break; | |
491 | } | |
492 | ||
0c1bc5c6 GP |
493 | opts.imtu = chan->imtu; |
494 | opts.omtu = chan->omtu; | |
495 | opts.flush_to = chan->flush_to; | |
496 | opts.mode = chan->mode; | |
47d1ec61 GP |
497 | opts.fcs = chan->fcs; |
498 | opts.max_tx = chan->max_tx; | |
499 | opts.txwin_size = (__u16)chan->tx_win; | |
33575df7 GP |
500 | |
501 | len = min_t(unsigned int, sizeof(opts), optlen); | |
502 | if (copy_from_user((char *) &opts, optval, len)) { | |
503 | err = -EFAULT; | |
504 | break; | |
505 | } | |
506 | ||
507 | if (opts.txwin_size > L2CAP_DEFAULT_TX_WINDOW) { | |
508 | err = -EINVAL; | |
509 | break; | |
510 | } | |
511 | ||
0c1bc5c6 GP |
512 | chan->mode = opts.mode; |
513 | switch (chan->mode) { | |
33575df7 | 514 | case L2CAP_MODE_BASIC: |
c1360a1c | 515 | clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
33575df7 GP |
516 | break; |
517 | case L2CAP_MODE_ERTM: | |
518 | case L2CAP_MODE_STREAMING: | |
519 | if (!disable_ertm) | |
520 | break; | |
521 | /* fall through */ | |
522 | default: | |
523 | err = -EINVAL; | |
524 | break; | |
525 | } | |
526 | ||
0c1bc5c6 GP |
527 | chan->imtu = opts.imtu; |
528 | chan->omtu = opts.omtu; | |
47d1ec61 GP |
529 | chan->fcs = opts.fcs; |
530 | chan->max_tx = opts.max_tx; | |
531 | chan->tx_win = (__u8)opts.txwin_size; | |
33575df7 GP |
532 | break; |
533 | ||
534 | case L2CAP_LM: | |
535 | if (get_user(opt, (u32 __user *) optval)) { | |
536 | err = -EFAULT; | |
537 | break; | |
538 | } | |
539 | ||
540 | if (opt & L2CAP_LM_AUTH) | |
4343478f | 541 | chan->sec_level = BT_SECURITY_LOW; |
33575df7 | 542 | if (opt & L2CAP_LM_ENCRYPT) |
4343478f | 543 | chan->sec_level = BT_SECURITY_MEDIUM; |
33575df7 | 544 | if (opt & L2CAP_LM_SECURE) |
4343478f | 545 | chan->sec_level = BT_SECURITY_HIGH; |
33575df7 | 546 | |
4343478f GP |
547 | chan->role_switch = (opt & L2CAP_LM_MASTER); |
548 | chan->force_reliable = (opt & L2CAP_LM_RELIABLE); | |
33575df7 GP |
549 | break; |
550 | ||
551 | default: | |
552 | err = -ENOPROTOOPT; | |
553 | break; | |
554 | } | |
555 | ||
556 | release_sock(sk); | |
557 | return err; | |
558 | } | |
559 | ||
560 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) | |
561 | { | |
562 | struct sock *sk = sock->sk; | |
4343478f | 563 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 | 564 | struct bt_security sec; |
14b12d0b | 565 | struct bt_power pwr; |
f1cb9af5 | 566 | struct l2cap_conn *conn; |
33575df7 GP |
567 | int len, err = 0; |
568 | u32 opt; | |
569 | ||
570 | BT_DBG("sk %p", sk); | |
571 | ||
572 | if (level == SOL_L2CAP) | |
573 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
574 | ||
575 | if (level != SOL_BLUETOOTH) | |
576 | return -ENOPROTOOPT; | |
577 | ||
578 | lock_sock(sk); | |
579 | ||
580 | switch (optname) { | |
581 | case BT_SECURITY: | |
715ec005 GP |
582 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
583 | chan->chan_type != L2CAP_CHAN_RAW) { | |
33575df7 GP |
584 | err = -EINVAL; |
585 | break; | |
586 | } | |
587 | ||
588 | sec.level = BT_SECURITY_LOW; | |
589 | ||
590 | len = min_t(unsigned int, sizeof(sec), optlen); | |
591 | if (copy_from_user((char *) &sec, optval, len)) { | |
592 | err = -EFAULT; | |
593 | break; | |
594 | } | |
595 | ||
596 | if (sec.level < BT_SECURITY_LOW || | |
597 | sec.level > BT_SECURITY_HIGH) { | |
598 | err = -EINVAL; | |
599 | break; | |
600 | } | |
601 | ||
4343478f | 602 | chan->sec_level = sec.level; |
f1cb9af5 VCG |
603 | |
604 | conn = chan->conn; | |
605 | if (conn && chan->scid == L2CAP_CID_LE_DATA) { | |
606 | if (!conn->hcon->out) { | |
607 | err = -EINVAL; | |
608 | break; | |
609 | } | |
610 | ||
611 | if (smp_conn_security(conn, sec.level)) | |
612 | break; | |
613 | ||
614 | err = 0; | |
615 | sk->sk_state = BT_CONFIG; | |
616 | } | |
33575df7 GP |
617 | break; |
618 | ||
619 | case BT_DEFER_SETUP: | |
620 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
621 | err = -EINVAL; | |
622 | break; | |
623 | } | |
624 | ||
625 | if (get_user(opt, (u32 __user *) optval)) { | |
626 | err = -EFAULT; | |
627 | break; | |
628 | } | |
629 | ||
630 | bt_sk(sk)->defer_setup = opt; | |
631 | break; | |
632 | ||
633 | case BT_FLUSHABLE: | |
634 | if (get_user(opt, (u32 __user *) optval)) { | |
635 | err = -EFAULT; | |
636 | break; | |
637 | } | |
638 | ||
639 | if (opt > BT_FLUSHABLE_ON) { | |
640 | err = -EINVAL; | |
641 | break; | |
642 | } | |
643 | ||
644 | if (opt == BT_FLUSHABLE_OFF) { | |
8c1d787b | 645 | struct l2cap_conn *conn = chan->conn; |
25985edc | 646 | /* proceed further only when we have l2cap_conn and |
33575df7 GP |
647 | No Flush support in the LM */ |
648 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { | |
649 | err = -EINVAL; | |
650 | break; | |
651 | } | |
652 | } | |
653 | ||
4343478f | 654 | chan->flushable = opt; |
33575df7 GP |
655 | break; |
656 | ||
14b12d0b JG |
657 | case BT_POWER: |
658 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && | |
659 | chan->chan_type != L2CAP_CHAN_RAW) { | |
660 | err = -EINVAL; | |
661 | break; | |
662 | } | |
663 | ||
664 | pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; | |
665 | ||
666 | len = min_t(unsigned int, sizeof(pwr), optlen); | |
667 | if (copy_from_user((char *) &pwr, optval, len)) { | |
668 | err = -EFAULT; | |
669 | break; | |
670 | } | |
671 | chan->force_active = pwr.force_active; | |
672 | break; | |
673 | ||
33575df7 GP |
674 | default: |
675 | err = -ENOPROTOOPT; | |
676 | break; | |
677 | } | |
678 | ||
679 | release_sock(sk); | |
680 | return err; | |
681 | } | |
fd83ccdb GP |
682 | |
683 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) | |
684 | { | |
685 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 686 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb GP |
687 | int err; |
688 | ||
689 | BT_DBG("sock %p, sk %p", sock, sk); | |
690 | ||
691 | err = sock_error(sk); | |
692 | if (err) | |
693 | return err; | |
694 | ||
695 | if (msg->msg_flags & MSG_OOB) | |
696 | return -EOPNOTSUPP; | |
697 | ||
698 | lock_sock(sk); | |
699 | ||
700 | if (sk->sk_state != BT_CONNECTED) { | |
9a91a04a GP |
701 | release_sock(sk); |
702 | return -ENOTCONN; | |
fd83ccdb GP |
703 | } |
704 | ||
9a91a04a | 705 | err = l2cap_chan_send(chan, msg, len); |
fd83ccdb | 706 | |
fd83ccdb GP |
707 | release_sock(sk); |
708 | return err; | |
709 | } | |
33575df7 | 710 | |
68983259 GP |
711 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
712 | { | |
713 | struct sock *sk = sock->sk; | |
714 | ||
715 | lock_sock(sk); | |
716 | ||
717 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { | |
8c1d787b GP |
718 | sk->sk_state = BT_CONFIG; |
719 | ||
720 | __l2cap_connect_rsp_defer(l2cap_pi(sk)->chan); | |
68983259 GP |
721 | release_sock(sk); |
722 | return 0; | |
723 | } | |
724 | ||
725 | release_sock(sk); | |
726 | ||
727 | if (sock->type == SOCK_STREAM) | |
728 | return bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); | |
729 | ||
730 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
731 | } | |
732 | ||
05fc1576 GP |
733 | /* Kill socket (only if zapped and orphan) |
734 | * Must be called on unlocked socket. | |
735 | */ | |
ba3bd0ee | 736 | static void l2cap_sock_kill(struct sock *sk) |
05fc1576 GP |
737 | { |
738 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
739 | return; | |
740 | ||
741 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
742 | ||
743 | /* Kill poor orphan */ | |
6ff5abbf | 744 | |
23691d75 | 745 | l2cap_chan_destroy(l2cap_pi(sk)->chan); |
05fc1576 GP |
746 | sock_set_flag(sk, SOCK_DEAD); |
747 | sock_put(sk); | |
748 | } | |
749 | ||
dcba0dba GP |
750 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
751 | { | |
752 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 753 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
dcba0dba GP |
754 | int err = 0; |
755 | ||
756 | BT_DBG("sock %p, sk %p", sock, sk); | |
757 | ||
758 | if (!sk) | |
759 | return 0; | |
760 | ||
761 | lock_sock(sk); | |
762 | if (!sk->sk_shutdown) { | |
0c1bc5c6 | 763 | if (chan->mode == L2CAP_MODE_ERTM) |
dcba0dba GP |
764 | err = __l2cap_wait_ack(sk); |
765 | ||
766 | sk->sk_shutdown = SHUTDOWN_MASK; | |
0f852724 | 767 | l2cap_chan_close(chan, 0); |
dcba0dba GP |
768 | |
769 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
770 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
771 | sk->sk_lingertime); | |
772 | } | |
773 | ||
774 | if (!err && sk->sk_err) | |
775 | err = -sk->sk_err; | |
776 | ||
777 | release_sock(sk); | |
778 | return err; | |
779 | } | |
780 | ||
554f05bb GP |
781 | static int l2cap_sock_release(struct socket *sock) |
782 | { | |
783 | struct sock *sk = sock->sk; | |
784 | int err; | |
785 | ||
786 | BT_DBG("sock %p, sk %p", sock, sk); | |
787 | ||
788 | if (!sk) | |
789 | return 0; | |
790 | ||
791 | err = l2cap_sock_shutdown(sock, 2); | |
792 | ||
793 | sock_orphan(sk); | |
794 | l2cap_sock_kill(sk); | |
795 | return err; | |
796 | } | |
797 | ||
80808e43 GP |
798 | static struct l2cap_chan *l2cap_sock_new_connection_cb(void *data) |
799 | { | |
800 | struct sock *sk, *parent = data; | |
801 | ||
802 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, | |
803 | GFP_ATOMIC); | |
804 | if (!sk) | |
805 | return NULL; | |
806 | ||
807 | l2cap_sock_init(sk, parent); | |
808 | ||
809 | return l2cap_pi(sk)->chan; | |
810 | } | |
811 | ||
23070494 GP |
812 | static int l2cap_sock_recv_cb(void *data, struct sk_buff *skb) |
813 | { | |
814 | struct sock *sk = data; | |
815 | ||
816 | return sock_queue_rcv_skb(sk, skb); | |
817 | } | |
818 | ||
ba3bd0ee GP |
819 | static void l2cap_sock_close_cb(void *data) |
820 | { | |
821 | struct sock *sk = data; | |
822 | ||
823 | l2cap_sock_kill(sk); | |
824 | } | |
825 | ||
89bc500e GP |
826 | static void l2cap_sock_state_change_cb(void *data, int state) |
827 | { | |
828 | struct sock *sk = data; | |
829 | ||
830 | sk->sk_state = state; | |
831 | } | |
832 | ||
80808e43 GP |
833 | static struct l2cap_ops l2cap_chan_ops = { |
834 | .name = "L2CAP Socket Interface", | |
835 | .new_connection = l2cap_sock_new_connection_cb, | |
23070494 | 836 | .recv = l2cap_sock_recv_cb, |
ba3bd0ee | 837 | .close = l2cap_sock_close_cb, |
89bc500e | 838 | .state_change = l2cap_sock_state_change_cb, |
80808e43 GP |
839 | }; |
840 | ||
bb58f747 GP |
841 | static void l2cap_sock_destruct(struct sock *sk) |
842 | { | |
843 | BT_DBG("sk %p", sk); | |
844 | ||
845 | skb_queue_purge(&sk->sk_receive_queue); | |
846 | skb_queue_purge(&sk->sk_write_queue); | |
847 | } | |
848 | ||
80808e43 | 849 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747 GP |
850 | { |
851 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
b4450035 | 852 | struct l2cap_chan *chan = pi->chan; |
bb58f747 GP |
853 | |
854 | BT_DBG("sk %p", sk); | |
855 | ||
856 | if (parent) { | |
b4450035 GP |
857 | struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
858 | ||
bb58f747 GP |
859 | sk->sk_type = parent->sk_type; |
860 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; | |
861 | ||
715ec005 | 862 | chan->chan_type = pchan->chan_type; |
0c1bc5c6 GP |
863 | chan->imtu = pchan->imtu; |
864 | chan->omtu = pchan->omtu; | |
b4450035 | 865 | chan->conf_state = pchan->conf_state; |
0c1bc5c6 | 866 | chan->mode = pchan->mode; |
47d1ec61 GP |
867 | chan->fcs = pchan->fcs; |
868 | chan->max_tx = pchan->max_tx; | |
869 | chan->tx_win = pchan->tx_win; | |
4343478f GP |
870 | chan->sec_level = pchan->sec_level; |
871 | chan->role_switch = pchan->role_switch; | |
872 | chan->force_reliable = pchan->force_reliable; | |
873 | chan->flushable = pchan->flushable; | |
14b12d0b | 874 | chan->force_active = pchan->force_active; |
bb58f747 | 875 | } else { |
715ec005 GP |
876 | |
877 | switch (sk->sk_type) { | |
878 | case SOCK_RAW: | |
879 | chan->chan_type = L2CAP_CHAN_RAW; | |
880 | break; | |
881 | case SOCK_DGRAM: | |
882 | chan->chan_type = L2CAP_CHAN_CONN_LESS; | |
883 | break; | |
884 | case SOCK_SEQPACKET: | |
885 | case SOCK_STREAM: | |
886 | chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; | |
887 | break; | |
888 | } | |
889 | ||
0c1bc5c6 GP |
890 | chan->imtu = L2CAP_DEFAULT_MTU; |
891 | chan->omtu = 0; | |
bb58f747 | 892 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c6 | 893 | chan->mode = L2CAP_MODE_ERTM; |
c1360a1c | 894 | set_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
bb58f747 | 895 | } else { |
0c1bc5c6 | 896 | chan->mode = L2CAP_MODE_BASIC; |
bb58f747 | 897 | } |
47d1ec61 GP |
898 | chan->max_tx = L2CAP_DEFAULT_MAX_TX; |
899 | chan->fcs = L2CAP_FCS_CRC16; | |
900 | chan->tx_win = L2CAP_DEFAULT_TX_WINDOW; | |
4343478f GP |
901 | chan->sec_level = BT_SECURITY_LOW; |
902 | chan->role_switch = 0; | |
903 | chan->force_reliable = 0; | |
904 | chan->flushable = BT_FLUSHABLE_OFF; | |
14b12d0b | 905 | chan->force_active = BT_POWER_FORCE_ACTIVE_ON; |
80808e43 | 906 | |
bb58f747 GP |
907 | } |
908 | ||
909 | /* Default config options */ | |
0c1bc5c6 | 910 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e43 GP |
911 | |
912 | chan->data = sk; | |
913 | chan->ops = &l2cap_chan_ops; | |
bb58f747 GP |
914 | } |
915 | ||
916 | static struct proto l2cap_proto = { | |
917 | .name = "L2CAP", | |
918 | .owner = THIS_MODULE, | |
919 | .obj_size = sizeof(struct l2cap_pinfo) | |
920 | }; | |
921 | ||
80808e43 | 922 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
bb58f747 GP |
923 | { |
924 | struct sock *sk; | |
dc50a06d | 925 | struct l2cap_chan *chan; |
bb58f747 GP |
926 | |
927 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); | |
928 | if (!sk) | |
929 | return NULL; | |
930 | ||
931 | sock_init_data(sock, sk); | |
932 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
933 | ||
934 | sk->sk_destruct = l2cap_sock_destruct; | |
935 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); | |
936 | ||
937 | sock_reset_flag(sk, SOCK_ZAPPED); | |
938 | ||
939 | sk->sk_protocol = proto; | |
940 | sk->sk_state = BT_OPEN; | |
941 | ||
dc50a06d GP |
942 | chan = l2cap_chan_create(sk); |
943 | if (!chan) { | |
944 | l2cap_sock_kill(sk); | |
945 | return NULL; | |
946 | } | |
947 | ||
948 | l2cap_pi(sk)->chan = chan; | |
949 | ||
bb58f747 GP |
950 | return sk; |
951 | } | |
952 | ||
953 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
954 | int kern) | |
955 | { | |
956 | struct sock *sk; | |
957 | ||
958 | BT_DBG("sock %p", sock); | |
959 | ||
960 | sock->state = SS_UNCONNECTED; | |
961 | ||
962 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
963 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
964 | return -ESOCKTNOSUPPORT; | |
965 | ||
966 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
967 | return -EPERM; | |
968 | ||
969 | sock->ops = &l2cap_sock_ops; | |
970 | ||
971 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); | |
972 | if (!sk) | |
973 | return -ENOMEM; | |
974 | ||
975 | l2cap_sock_init(sk, NULL); | |
976 | return 0; | |
977 | } | |
978 | ||
cf2f90f5 | 979 | static const struct proto_ops l2cap_sock_ops = { |
65390587 GP |
980 | .family = PF_BLUETOOTH, |
981 | .owner = THIS_MODULE, | |
982 | .release = l2cap_sock_release, | |
983 | .bind = l2cap_sock_bind, | |
984 | .connect = l2cap_sock_connect, | |
985 | .listen = l2cap_sock_listen, | |
986 | .accept = l2cap_sock_accept, | |
987 | .getname = l2cap_sock_getname, | |
988 | .sendmsg = l2cap_sock_sendmsg, | |
989 | .recvmsg = l2cap_sock_recvmsg, | |
990 | .poll = bt_sock_poll, | |
991 | .ioctl = bt_sock_ioctl, | |
992 | .mmap = sock_no_mmap, | |
993 | .socketpair = sock_no_socketpair, | |
994 | .shutdown = l2cap_sock_shutdown, | |
995 | .setsockopt = l2cap_sock_setsockopt, | |
996 | .getsockopt = l2cap_sock_getsockopt | |
997 | }; | |
998 | ||
bb58f747 GP |
999 | static const struct net_proto_family l2cap_sock_family_ops = { |
1000 | .family = PF_BLUETOOTH, | |
1001 | .owner = THIS_MODULE, | |
1002 | .create = l2cap_sock_create, | |
1003 | }; | |
1004 | ||
1005 | int __init l2cap_init_sockets(void) | |
1006 | { | |
e2174ca4 | 1007 | int err; |
bb58f747 | 1008 | |
e2174ca4 GP |
1009 | err = proto_register(&l2cap_proto, 0); |
1010 | if (err < 0) | |
1011 | return err; | |
bb58f747 | 1012 | |
e2174ca4 GP |
1013 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
1014 | if (err < 0) | |
1015 | goto error; | |
bb58f747 | 1016 | |
e2174ca4 | 1017 | BT_INFO("L2CAP socket layer initialized"); |
bb58f747 | 1018 | |
e2174ca4 | 1019 | return 0; |
bb58f747 GP |
1020 | |
1021 | error: | |
e2174ca4 GP |
1022 | BT_ERR("L2CAP socket registration failed"); |
1023 | proto_unregister(&l2cap_proto); | |
1024 | return err; | |
bb58f747 GP |
1025 | } |
1026 | ||
1027 | void l2cap_cleanup_sockets(void) | |
1028 | { | |
e2174ca4 GP |
1029 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) |
1030 | BT_ERR("L2CAP socket unregistration failed"); | |
bb58f747 | 1031 | |
e2174ca4 | 1032 | proto_unregister(&l2cap_proto); |
bb58f747 | 1033 | } |