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Commit | Line | Data |
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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. | |
590051de | 6 | Copyright (C) 2011 ProFUSION Embedded Systems |
bb58f747 GP |
7 | |
8 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License version 2 as | |
12 | published by the Free Software Foundation; | |
13 | ||
14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
15 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
17 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
18 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES | |
19 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
20 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
21 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
22 | ||
23 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, | |
24 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
25 | SOFTWARE IS DISCLAIMED. | |
26 | */ | |
27 | ||
28 | /* Bluetooth L2CAP sockets. */ | |
29 | ||
6230c9b4 | 30 | #include <linux/security.h> |
bc3b2d7f | 31 | #include <linux/export.h> |
6230c9b4 | 32 | |
bb58f747 | 33 | #include <net/bluetooth/bluetooth.h> |
33575df7 | 34 | #include <net/bluetooth/hci_core.h> |
bb58f747 | 35 | #include <net/bluetooth/l2cap.h> |
f1cb9af5 | 36 | #include <net/bluetooth/smp.h> |
bb58f747 | 37 | |
cf2f90f5 | 38 | static const struct proto_ops l2cap_sock_ops; |
80808e43 GP |
39 | static void l2cap_sock_init(struct sock *sk, struct sock *parent); |
40 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio); | |
cf2f90f5 | 41 | |
af6bcd82 GP |
42 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
43 | { | |
44 | struct sock *sk = sock->sk; | |
4343478f | 45 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
46 | struct sockaddr_l2 la; |
47 | int len, err = 0; | |
48 | ||
49 | BT_DBG("sk %p", sk); | |
50 | ||
51 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
52 | return -EINVAL; | |
53 | ||
54 | memset(&la, 0, sizeof(la)); | |
55 | len = min_t(unsigned int, sizeof(la), alen); | |
56 | memcpy(&la, addr, len); | |
57 | ||
b62f328b | 58 | if (la.l2_cid && la.l2_psm) |
af6bcd82 GP |
59 | return -EINVAL; |
60 | ||
61 | lock_sock(sk); | |
62 | ||
63 | if (sk->sk_state != BT_OPEN) { | |
64 | err = -EBADFD; | |
65 | goto done; | |
66 | } | |
67 | ||
68 | if (la.l2_psm) { | |
69 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
70 | ||
71 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
72 | if ((psm & 0x0101) != 0x0001) { | |
73 | err = -EINVAL; | |
74 | goto done; | |
75 | } | |
76 | ||
77 | /* Restrict usage of well-known PSMs */ | |
78 | if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { | |
79 | err = -EACCES; | |
80 | goto done; | |
81 | } | |
82 | } | |
83 | ||
9e4425ff | 84 | if (la.l2_cid) |
6e4aff10 | 85 | err = l2cap_add_scid(chan, __le16_to_cpu(la.l2_cid)); |
9e4425ff GP |
86 | else |
87 | err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm); | |
af6bcd82 | 88 | |
9e4425ff GP |
89 | if (err < 0) |
90 | goto done; | |
af6bcd82 | 91 | |
9e4425ff GP |
92 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || |
93 | __le16_to_cpu(la.l2_psm) == 0x0003) | |
94 | chan->sec_level = BT_SECURITY_SDP; | |
b62f328b | 95 | |
9e4425ff | 96 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
89bc500e GP |
97 | |
98 | chan->state = BT_BOUND; | |
9e4425ff | 99 | sk->sk_state = BT_BOUND; |
af6bcd82 GP |
100 | |
101 | done: | |
102 | release_sock(sk); | |
103 | return err; | |
104 | } | |
105 | ||
4e34c50b GP |
106 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) |
107 | { | |
108 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 109 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
4e34c50b GP |
110 | struct sockaddr_l2 la; |
111 | int len, err = 0; | |
112 | ||
113 | BT_DBG("sk %p", sk); | |
114 | ||
115 | if (!addr || alen < sizeof(addr->sa_family) || | |
116 | addr->sa_family != AF_BLUETOOTH) | |
117 | return -EINVAL; | |
118 | ||
119 | memset(&la, 0, sizeof(la)); | |
120 | len = min_t(unsigned int, sizeof(la), alen); | |
121 | memcpy(&la, addr, len); | |
122 | ||
acd7d370 | 123 | if (la.l2_cid && la.l2_psm) |
4e34c50b GP |
124 | return -EINVAL; |
125 | ||
6e4aff10 | 126 | err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid), |
8e9f9892 | 127 | &la.l2_bdaddr, la.l2_bdaddr_type); |
4e34c50b | 128 | if (err) |
b3fb611e | 129 | return err; |
4e34c50b | 130 | |
6be36555 AE |
131 | lock_sock(sk); |
132 | ||
4e34c50b GP |
133 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
134 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
b3fb611e AE |
135 | |
136 | release_sock(sk); | |
137 | ||
4e34c50b GP |
138 | return err; |
139 | } | |
140 | ||
af6bcd82 GP |
141 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
142 | { | |
143 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 144 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
145 | int err = 0; |
146 | ||
147 | BT_DBG("sk %p backlog %d", sk, backlog); | |
148 | ||
149 | lock_sock(sk); | |
150 | ||
6b3af733 | 151 | if (sk->sk_state != BT_BOUND) { |
af6bcd82 GP |
152 | err = -EBADFD; |
153 | goto done; | |
154 | } | |
155 | ||
6b3af733 MH |
156 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) { |
157 | err = -EINVAL; | |
158 | goto done; | |
159 | } | |
160 | ||
0c1bc5c6 | 161 | switch (chan->mode) { |
af6bcd82 GP |
162 | case L2CAP_MODE_BASIC: |
163 | break; | |
164 | case L2CAP_MODE_ERTM: | |
165 | case L2CAP_MODE_STREAMING: | |
166 | if (!disable_ertm) | |
167 | break; | |
168 | /* fall through */ | |
169 | default: | |
170 | err = -ENOTSUPP; | |
171 | goto done; | |
172 | } | |
173 | ||
af6bcd82 GP |
174 | sk->sk_max_ack_backlog = backlog; |
175 | sk->sk_ack_backlog = 0; | |
89bc500e GP |
176 | |
177 | chan->state = BT_LISTEN; | |
af6bcd82 GP |
178 | sk->sk_state = BT_LISTEN; |
179 | ||
180 | done: | |
181 | release_sock(sk); | |
182 | return err; | |
183 | } | |
184 | ||
c47b7c72 GP |
185 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) |
186 | { | |
187 | DECLARE_WAITQUEUE(wait, current); | |
188 | struct sock *sk = sock->sk, *nsk; | |
189 | long timeo; | |
190 | int err = 0; | |
191 | ||
192 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
193 | ||
c47b7c72 GP |
194 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
195 | ||
196 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
197 | ||
198 | /* Wait for an incoming connection. (wake-one). */ | |
199 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
f9a3c20a | 200 | while (1) { |
c47b7c72 | 201 | set_current_state(TASK_INTERRUPTIBLE); |
f9a3c20a PH |
202 | |
203 | if (sk->sk_state != BT_LISTEN) { | |
204 | err = -EBADFD; | |
c47b7c72 GP |
205 | break; |
206 | } | |
207 | ||
f9a3c20a PH |
208 | nsk = bt_accept_dequeue(sk, newsock); |
209 | if (nsk) | |
210 | break; | |
c47b7c72 | 211 | |
f9a3c20a PH |
212 | if (!timeo) { |
213 | err = -EAGAIN; | |
c47b7c72 GP |
214 | break; |
215 | } | |
216 | ||
217 | if (signal_pending(current)) { | |
218 | err = sock_intr_errno(timeo); | |
219 | break; | |
220 | } | |
f9a3c20a PH |
221 | |
222 | release_sock(sk); | |
223 | timeo = schedule_timeout(timeo); | |
224 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
c47b7c72 | 225 | } |
f9a3c20a | 226 | __set_current_state(TASK_RUNNING); |
c47b7c72 GP |
227 | remove_wait_queue(sk_sleep(sk), &wait); |
228 | ||
229 | if (err) | |
230 | goto done; | |
231 | ||
232 | newsock->state = SS_CONNECTED; | |
233 | ||
234 | BT_DBG("new socket %p", nsk); | |
235 | ||
236 | done: | |
237 | release_sock(sk); | |
238 | return err; | |
239 | } | |
240 | ||
d7175d55 GP |
241 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) |
242 | { | |
243 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
244 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 245 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
d7175d55 GP |
246 | |
247 | BT_DBG("sock %p, sk %p", sock, sk); | |
248 | ||
249 | addr->sa_family = AF_BLUETOOTH; | |
250 | *len = sizeof(struct sockaddr_l2); | |
251 | ||
252 | if (peer) { | |
fe4128e0 | 253 | la->l2_psm = chan->psm; |
d7175d55 | 254 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
fe4128e0 | 255 | la->l2_cid = cpu_to_le16(chan->dcid); |
d7175d55 | 256 | } else { |
0c1bc5c6 | 257 | la->l2_psm = chan->sport; |
d7175d55 | 258 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
fe4128e0 | 259 | la->l2_cid = cpu_to_le16(chan->scid); |
d7175d55 GP |
260 | } |
261 | ||
262 | return 0; | |
263 | } | |
264 | ||
99f4808d GP |
265 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
266 | { | |
267 | struct sock *sk = sock->sk; | |
4343478f | 268 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d GP |
269 | struct l2cap_options opts; |
270 | struct l2cap_conninfo cinfo; | |
271 | int len, err = 0; | |
272 | u32 opt; | |
273 | ||
274 | BT_DBG("sk %p", sk); | |
275 | ||
276 | if (get_user(len, optlen)) | |
277 | return -EFAULT; | |
278 | ||
279 | lock_sock(sk); | |
280 | ||
281 | switch (optname) { | |
282 | case L2CAP_OPTIONS: | |
e3fb592b | 283 | memset(&opts, 0, sizeof(opts)); |
0c1bc5c6 GP |
284 | opts.imtu = chan->imtu; |
285 | opts.omtu = chan->omtu; | |
286 | opts.flush_to = chan->flush_to; | |
287 | opts.mode = chan->mode; | |
47d1ec61 GP |
288 | opts.fcs = chan->fcs; |
289 | opts.max_tx = chan->max_tx; | |
6327eb98 | 290 | opts.txwin_size = chan->tx_win; |
99f4808d GP |
291 | |
292 | len = min_t(unsigned int, len, sizeof(opts)); | |
293 | if (copy_to_user(optval, (char *) &opts, len)) | |
294 | err = -EFAULT; | |
295 | ||
296 | break; | |
297 | ||
298 | case L2CAP_LM: | |
4343478f | 299 | switch (chan->sec_level) { |
99f4808d GP |
300 | case BT_SECURITY_LOW: |
301 | opt = L2CAP_LM_AUTH; | |
302 | break; | |
303 | case BT_SECURITY_MEDIUM: | |
304 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
305 | break; | |
306 | case BT_SECURITY_HIGH: | |
307 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
308 | L2CAP_LM_SECURE; | |
309 | break; | |
310 | default: | |
311 | opt = 0; | |
312 | break; | |
313 | } | |
314 | ||
43bd0f32 | 315 | if (test_bit(FLAG_ROLE_SWITCH, &chan->flags)) |
99f4808d GP |
316 | opt |= L2CAP_LM_MASTER; |
317 | ||
ecf61bdb | 318 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
99f4808d GP |
319 | opt |= L2CAP_LM_RELIABLE; |
320 | ||
321 | if (put_user(opt, (u32 __user *) optval)) | |
322 | err = -EFAULT; | |
323 | break; | |
324 | ||
325 | case L2CAP_CONNINFO: | |
326 | if (sk->sk_state != BT_CONNECTED && | |
c5daa683 GP |
327 | !(sk->sk_state == BT_CONNECT2 && |
328 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { | |
99f4808d GP |
329 | err = -ENOTCONN; |
330 | break; | |
331 | } | |
332 | ||
8d03e971 | 333 | memset(&cinfo, 0, sizeof(cinfo)); |
8c1d787b GP |
334 | cinfo.hci_handle = chan->conn->hcon->handle; |
335 | memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); | |
99f4808d GP |
336 | |
337 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
338 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
339 | err = -EFAULT; | |
340 | ||
341 | break; | |
342 | ||
343 | default: | |
344 | err = -ENOPROTOOPT; | |
345 | break; | |
346 | } | |
347 | ||
348 | release_sock(sk); | |
349 | return err; | |
350 | } | |
351 | ||
352 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
353 | { | |
354 | struct sock *sk = sock->sk; | |
4343478f | 355 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d | 356 | struct bt_security sec; |
14b12d0b | 357 | struct bt_power pwr; |
99f4808d GP |
358 | int len, err = 0; |
359 | ||
360 | BT_DBG("sk %p", sk); | |
361 | ||
362 | if (level == SOL_L2CAP) | |
363 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
364 | ||
365 | if (level != SOL_BLUETOOTH) | |
366 | return -ENOPROTOOPT; | |
367 | ||
368 | if (get_user(len, optlen)) | |
369 | return -EFAULT; | |
370 | ||
371 | lock_sock(sk); | |
372 | ||
373 | switch (optname) { | |
374 | case BT_SECURITY: | |
715ec005 GP |
375 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
376 | chan->chan_type != L2CAP_CHAN_RAW) { | |
99f4808d GP |
377 | err = -EINVAL; |
378 | break; | |
379 | } | |
380 | ||
8f360119 | 381 | memset(&sec, 0, sizeof(sec)); |
c6585a4d GP |
382 | if (chan->conn) |
383 | sec.level = chan->conn->hcon->sec_level; | |
384 | else | |
385 | sec.level = chan->sec_level; | |
99f4808d | 386 | |
8f360119 VCG |
387 | if (sk->sk_state == BT_CONNECTED) |
388 | sec.key_size = chan->conn->hcon->enc_key_size; | |
389 | ||
99f4808d GP |
390 | len = min_t(unsigned int, len, sizeof(sec)); |
391 | if (copy_to_user(optval, (char *) &sec, len)) | |
392 | err = -EFAULT; | |
393 | ||
394 | break; | |
395 | ||
396 | case BT_DEFER_SETUP: | |
397 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
398 | err = -EINVAL; | |
399 | break; | |
400 | } | |
401 | ||
c5daa683 GP |
402 | if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), |
403 | (u32 __user *) optval)) | |
99f4808d GP |
404 | err = -EFAULT; |
405 | ||
406 | break; | |
407 | ||
408 | case BT_FLUSHABLE: | |
d57b0e8b AE |
409 | if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags), |
410 | (u32 __user *) optval)) | |
99f4808d GP |
411 | err = -EFAULT; |
412 | ||
413 | break; | |
414 | ||
14b12d0b JG |
415 | case BT_POWER: |
416 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
417 | && sk->sk_type != SOCK_RAW) { | |
418 | err = -EINVAL; | |
419 | break; | |
420 | } | |
421 | ||
15770b1a | 422 | pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
14b12d0b JG |
423 | |
424 | len = min_t(unsigned int, len, sizeof(pwr)); | |
425 | if (copy_to_user(optval, (char *) &pwr, len)) | |
426 | err = -EFAULT; | |
427 | ||
428 | break; | |
429 | ||
2ea66482 MM |
430 | case BT_CHANNEL_POLICY: |
431 | if (!enable_hs) { | |
432 | err = -ENOPROTOOPT; | |
433 | break; | |
434 | } | |
435 | ||
436 | if (put_user(chan->chan_policy, (u32 __user *) optval)) | |
437 | err = -EFAULT; | |
438 | break; | |
439 | ||
99f4808d GP |
440 | default: |
441 | err = -ENOPROTOOPT; | |
442 | break; | |
443 | } | |
444 | ||
445 | release_sock(sk); | |
446 | return err; | |
447 | } | |
448 | ||
33575df7 GP |
449 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
450 | { | |
451 | struct sock *sk = sock->sk; | |
b4450035 | 452 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 GP |
453 | struct l2cap_options opts; |
454 | int len, err = 0; | |
455 | u32 opt; | |
456 | ||
457 | BT_DBG("sk %p", sk); | |
458 | ||
459 | lock_sock(sk); | |
460 | ||
461 | switch (optname) { | |
462 | case L2CAP_OPTIONS: | |
463 | if (sk->sk_state == BT_CONNECTED) { | |
464 | err = -EINVAL; | |
465 | break; | |
466 | } | |
467 | ||
0c1bc5c6 GP |
468 | opts.imtu = chan->imtu; |
469 | opts.omtu = chan->omtu; | |
470 | opts.flush_to = chan->flush_to; | |
471 | opts.mode = chan->mode; | |
47d1ec61 GP |
472 | opts.fcs = chan->fcs; |
473 | opts.max_tx = chan->max_tx; | |
6327eb98 | 474 | opts.txwin_size = chan->tx_win; |
33575df7 GP |
475 | |
476 | len = min_t(unsigned int, sizeof(opts), optlen); | |
477 | if (copy_from_user((char *) &opts, optval, len)) { | |
478 | err = -EFAULT; | |
479 | break; | |
480 | } | |
481 | ||
6327eb98 | 482 | if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) { |
33575df7 GP |
483 | err = -EINVAL; |
484 | break; | |
485 | } | |
486 | ||
0c1bc5c6 GP |
487 | chan->mode = opts.mode; |
488 | switch (chan->mode) { | |
33575df7 | 489 | case L2CAP_MODE_BASIC: |
c1360a1c | 490 | clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
33575df7 GP |
491 | break; |
492 | case L2CAP_MODE_ERTM: | |
493 | case L2CAP_MODE_STREAMING: | |
494 | if (!disable_ertm) | |
495 | break; | |
496 | /* fall through */ | |
497 | default: | |
498 | err = -EINVAL; | |
499 | break; | |
500 | } | |
501 | ||
0c1bc5c6 GP |
502 | chan->imtu = opts.imtu; |
503 | chan->omtu = opts.omtu; | |
47d1ec61 GP |
504 | chan->fcs = opts.fcs; |
505 | chan->max_tx = opts.max_tx; | |
6327eb98 | 506 | chan->tx_win = opts.txwin_size; |
33575df7 GP |
507 | break; |
508 | ||
509 | case L2CAP_LM: | |
510 | if (get_user(opt, (u32 __user *) optval)) { | |
511 | err = -EFAULT; | |
512 | break; | |
513 | } | |
514 | ||
515 | if (opt & L2CAP_LM_AUTH) | |
4343478f | 516 | chan->sec_level = BT_SECURITY_LOW; |
33575df7 | 517 | if (opt & L2CAP_LM_ENCRYPT) |
4343478f | 518 | chan->sec_level = BT_SECURITY_MEDIUM; |
33575df7 | 519 | if (opt & L2CAP_LM_SECURE) |
4343478f | 520 | chan->sec_level = BT_SECURITY_HIGH; |
33575df7 | 521 | |
43bd0f32 AE |
522 | if (opt & L2CAP_LM_MASTER) |
523 | set_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
524 | else | |
525 | clear_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
ecf61bdb AE |
526 | |
527 | if (opt & L2CAP_LM_RELIABLE) | |
528 | set_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
529 | else | |
530 | clear_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
33575df7 GP |
531 | break; |
532 | ||
533 | default: | |
534 | err = -ENOPROTOOPT; | |
535 | break; | |
536 | } | |
537 | ||
538 | release_sock(sk); | |
539 | return err; | |
540 | } | |
541 | ||
542 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) | |
543 | { | |
544 | struct sock *sk = sock->sk; | |
4343478f | 545 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 | 546 | struct bt_security sec; |
14b12d0b | 547 | struct bt_power pwr; |
f1cb9af5 | 548 | struct l2cap_conn *conn; |
33575df7 GP |
549 | int len, err = 0; |
550 | u32 opt; | |
551 | ||
552 | BT_DBG("sk %p", sk); | |
553 | ||
554 | if (level == SOL_L2CAP) | |
555 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
556 | ||
557 | if (level != SOL_BLUETOOTH) | |
558 | return -ENOPROTOOPT; | |
559 | ||
560 | lock_sock(sk); | |
561 | ||
562 | switch (optname) { | |
563 | case BT_SECURITY: | |
715ec005 GP |
564 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
565 | chan->chan_type != L2CAP_CHAN_RAW) { | |
33575df7 GP |
566 | err = -EINVAL; |
567 | break; | |
568 | } | |
569 | ||
570 | sec.level = BT_SECURITY_LOW; | |
571 | ||
572 | len = min_t(unsigned int, sizeof(sec), optlen); | |
573 | if (copy_from_user((char *) &sec, optval, len)) { | |
574 | err = -EFAULT; | |
575 | break; | |
576 | } | |
577 | ||
578 | if (sec.level < BT_SECURITY_LOW || | |
579 | sec.level > BT_SECURITY_HIGH) { | |
580 | err = -EINVAL; | |
581 | break; | |
582 | } | |
583 | ||
4343478f | 584 | chan->sec_level = sec.level; |
f1cb9af5 | 585 | |
0bee1d60 GP |
586 | if (!chan->conn) |
587 | break; | |
588 | ||
f1cb9af5 | 589 | conn = chan->conn; |
0bee1d60 GP |
590 | |
591 | /*change security for LE channels */ | |
592 | if (chan->scid == L2CAP_CID_LE_DATA) { | |
f1cb9af5 VCG |
593 | if (!conn->hcon->out) { |
594 | err = -EINVAL; | |
595 | break; | |
596 | } | |
597 | ||
598 | if (smp_conn_security(conn, sec.level)) | |
599 | break; | |
f1cb9af5 | 600 | sk->sk_state = BT_CONFIG; |
3542b854 | 601 | chan->state = BT_CONFIG; |
0bee1d60 | 602 | |
a7d7723a GP |
603 | /* or for ACL link */ |
604 | } else if ((sk->sk_state == BT_CONNECT2 && | |
c5daa683 | 605 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) || |
a7d7723a GP |
606 | sk->sk_state == BT_CONNECTED) { |
607 | if (!l2cap_chan_check_security(chan)) | |
c5daa683 | 608 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
a7d7723a GP |
609 | else |
610 | sk->sk_state_change(sk); | |
0bee1d60 GP |
611 | } else { |
612 | err = -EINVAL; | |
f1cb9af5 | 613 | } |
33575df7 GP |
614 | break; |
615 | ||
616 | case BT_DEFER_SETUP: | |
617 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
618 | err = -EINVAL; | |
619 | break; | |
620 | } | |
621 | ||
622 | if (get_user(opt, (u32 __user *) optval)) { | |
623 | err = -EFAULT; | |
624 | break; | |
625 | } | |
626 | ||
c5daa683 GP |
627 | if (opt) |
628 | set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); | |
629 | else | |
630 | clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); | |
33575df7 GP |
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 | ||
d57b0e8b AE |
654 | if (opt) |
655 | set_bit(FLAG_FLUSHABLE, &chan->flags); | |
656 | else | |
657 | clear_bit(FLAG_FLUSHABLE, &chan->flags); | |
33575df7 GP |
658 | break; |
659 | ||
14b12d0b JG |
660 | case BT_POWER: |
661 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && | |
662 | chan->chan_type != L2CAP_CHAN_RAW) { | |
663 | err = -EINVAL; | |
664 | break; | |
665 | } | |
666 | ||
667 | pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; | |
668 | ||
669 | len = min_t(unsigned int, sizeof(pwr), optlen); | |
670 | if (copy_from_user((char *) &pwr, optval, len)) { | |
671 | err = -EFAULT; | |
672 | break; | |
673 | } | |
15770b1a AE |
674 | |
675 | if (pwr.force_active) | |
676 | set_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
677 | else | |
678 | clear_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
14b12d0b JG |
679 | break; |
680 | ||
2ea66482 MM |
681 | case BT_CHANNEL_POLICY: |
682 | if (!enable_hs) { | |
683 | err = -ENOPROTOOPT; | |
684 | break; | |
685 | } | |
686 | ||
687 | if (get_user(opt, (u32 __user *) optval)) { | |
688 | err = -EFAULT; | |
689 | break; | |
690 | } | |
691 | ||
692 | if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) { | |
693 | err = -EINVAL; | |
694 | break; | |
695 | } | |
696 | ||
697 | if (chan->mode != L2CAP_MODE_ERTM && | |
698 | chan->mode != L2CAP_MODE_STREAMING) { | |
699 | err = -EOPNOTSUPP; | |
700 | break; | |
701 | } | |
702 | ||
703 | chan->chan_policy = (u8) opt; | |
14b12d0b JG |
704 | break; |
705 | ||
33575df7 GP |
706 | default: |
707 | err = -ENOPROTOOPT; | |
708 | break; | |
709 | } | |
710 | ||
711 | release_sock(sk); | |
712 | return err; | |
713 | } | |
fd83ccdb GP |
714 | |
715 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) | |
716 | { | |
717 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 718 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb GP |
719 | int err; |
720 | ||
721 | BT_DBG("sock %p, sk %p", sock, sk); | |
722 | ||
723 | err = sock_error(sk); | |
724 | if (err) | |
725 | return err; | |
726 | ||
727 | if (msg->msg_flags & MSG_OOB) | |
728 | return -EOPNOTSUPP; | |
729 | ||
a6a5568c | 730 | if (sk->sk_state != BT_CONNECTED) |
9a91a04a | 731 | return -ENOTCONN; |
fd83ccdb | 732 | |
a6a5568c | 733 | l2cap_chan_lock(chan); |
5e59b791 | 734 | err = l2cap_chan_send(chan, msg, len, sk->sk_priority); |
a6a5568c | 735 | l2cap_chan_unlock(chan); |
fd83ccdb | 736 | |
fd83ccdb GP |
737 | return err; |
738 | } | |
33575df7 | 739 | |
68983259 GP |
740 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
741 | { | |
742 | struct sock *sk = sock->sk; | |
e328140f MM |
743 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
744 | int err; | |
68983259 GP |
745 | |
746 | lock_sock(sk); | |
747 | ||
c5daa683 GP |
748 | if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP, |
749 | &bt_sk(sk)->flags)) { | |
8c1d787b | 750 | sk->sk_state = BT_CONFIG; |
3542b854 | 751 | pi->chan->state = BT_CONFIG; |
8c1d787b | 752 | |
e328140f | 753 | __l2cap_connect_rsp_defer(pi->chan); |
68983259 GP |
754 | release_sock(sk); |
755 | return 0; | |
756 | } | |
757 | ||
758 | release_sock(sk); | |
759 | ||
760 | if (sock->type == SOCK_STREAM) | |
e328140f MM |
761 | err = bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); |
762 | else | |
763 | err = bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
764 | ||
765 | if (pi->chan->mode != L2CAP_MODE_ERTM) | |
766 | return err; | |
767 | ||
768 | /* Attempt to put pending rx data in the socket buffer */ | |
769 | ||
770 | lock_sock(sk); | |
771 | ||
772 | if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state)) | |
773 | goto done; | |
774 | ||
775 | if (pi->rx_busy_skb) { | |
776 | if (!sock_queue_rcv_skb(sk, pi->rx_busy_skb)) | |
777 | pi->rx_busy_skb = NULL; | |
778 | else | |
779 | goto done; | |
780 | } | |
781 | ||
782 | /* Restore data flow when half of the receive buffer is | |
783 | * available. This avoids resending large numbers of | |
784 | * frames. | |
785 | */ | |
786 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1) | |
787 | l2cap_chan_busy(pi->chan, 0); | |
68983259 | 788 | |
e328140f MM |
789 | done: |
790 | release_sock(sk); | |
791 | return err; | |
68983259 GP |
792 | } |
793 | ||
05fc1576 GP |
794 | /* Kill socket (only if zapped and orphan) |
795 | * Must be called on unlocked socket. | |
796 | */ | |
ba3bd0ee | 797 | static void l2cap_sock_kill(struct sock *sk) |
05fc1576 GP |
798 | { |
799 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
800 | return; | |
801 | ||
e05dcc32 | 802 | BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state)); |
05fc1576 GP |
803 | |
804 | /* Kill poor orphan */ | |
6ff5abbf | 805 | |
23691d75 | 806 | l2cap_chan_destroy(l2cap_pi(sk)->chan); |
05fc1576 GP |
807 | sock_set_flag(sk, SOCK_DEAD); |
808 | sock_put(sk); | |
809 | } | |
810 | ||
dcba0dba GP |
811 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
812 | { | |
813 | struct sock *sk = sock->sk; | |
7ddb6e0f | 814 | struct l2cap_chan *chan; |
3df91ea2 | 815 | struct l2cap_conn *conn; |
dcba0dba GP |
816 | int err = 0; |
817 | ||
818 | BT_DBG("sock %p, sk %p", sock, sk); | |
819 | ||
820 | if (!sk) | |
821 | return 0; | |
822 | ||
7ddb6e0f | 823 | chan = l2cap_pi(sk)->chan; |
3df91ea2 AE |
824 | conn = chan->conn; |
825 | ||
826 | if (conn) | |
827 | mutex_lock(&conn->chan_lock); | |
7ddb6e0f | 828 | |
6be36555 | 829 | l2cap_chan_lock(chan); |
dcba0dba | 830 | lock_sock(sk); |
6be36555 | 831 | |
dcba0dba | 832 | if (!sk->sk_shutdown) { |
0c1bc5c6 | 833 | if (chan->mode == L2CAP_MODE_ERTM) |
dcba0dba GP |
834 | err = __l2cap_wait_ack(sk); |
835 | ||
836 | sk->sk_shutdown = SHUTDOWN_MASK; | |
3df91ea2 | 837 | |
6be36555 | 838 | release_sock(sk); |
0f852724 | 839 | l2cap_chan_close(chan, 0); |
6be36555 | 840 | lock_sock(sk); |
dcba0dba GP |
841 | |
842 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
843 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
844 | sk->sk_lingertime); | |
845 | } | |
846 | ||
847 | if (!err && sk->sk_err) | |
848 | err = -sk->sk_err; | |
849 | ||
850 | release_sock(sk); | |
6be36555 | 851 | l2cap_chan_unlock(chan); |
3df91ea2 AE |
852 | |
853 | if (conn) | |
854 | mutex_unlock(&conn->chan_lock); | |
855 | ||
dcba0dba GP |
856 | return err; |
857 | } | |
858 | ||
554f05bb GP |
859 | static int l2cap_sock_release(struct socket *sock) |
860 | { | |
861 | struct sock *sk = sock->sk; | |
862 | int err; | |
863 | ||
864 | BT_DBG("sock %p, sk %p", sock, sk); | |
865 | ||
866 | if (!sk) | |
867 | return 0; | |
868 | ||
869 | err = l2cap_sock_shutdown(sock, 2); | |
870 | ||
871 | sock_orphan(sk); | |
872 | l2cap_sock_kill(sk); | |
873 | return err; | |
874 | } | |
875 | ||
80808e43 GP |
876 | static struct l2cap_chan *l2cap_sock_new_connection_cb(void *data) |
877 | { | |
878 | struct sock *sk, *parent = data; | |
879 | ||
880 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, | |
881 | GFP_ATOMIC); | |
882 | if (!sk) | |
883 | return NULL; | |
884 | ||
d22015aa OP |
885 | bt_sock_reclassify_lock(sk, BTPROTO_L2CAP); |
886 | ||
80808e43 GP |
887 | l2cap_sock_init(sk, parent); |
888 | ||
889 | return l2cap_pi(sk)->chan; | |
890 | } | |
891 | ||
23070494 GP |
892 | static int l2cap_sock_recv_cb(void *data, struct sk_buff *skb) |
893 | { | |
e328140f | 894 | int err; |
23070494 | 895 | struct sock *sk = data; |
e328140f MM |
896 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
897 | ||
6be36555 AE |
898 | lock_sock(sk); |
899 | ||
900 | if (pi->rx_busy_skb) { | |
901 | err = -ENOMEM; | |
902 | goto done; | |
903 | } | |
e328140f MM |
904 | |
905 | err = sock_queue_rcv_skb(sk, skb); | |
906 | ||
907 | /* For ERTM, handle one skb that doesn't fit into the recv | |
908 | * buffer. This is important to do because the data frames | |
909 | * have already been acked, so the skb cannot be discarded. | |
910 | * | |
911 | * Notify the l2cap core that the buffer is full, so the | |
912 | * LOCAL_BUSY state is entered and no more frames are | |
913 | * acked and reassembled until there is buffer space | |
914 | * available. | |
915 | */ | |
916 | if (err < 0 && pi->chan->mode == L2CAP_MODE_ERTM) { | |
917 | pi->rx_busy_skb = skb; | |
918 | l2cap_chan_busy(pi->chan, 1); | |
919 | err = 0; | |
920 | } | |
23070494 | 921 | |
6be36555 AE |
922 | done: |
923 | release_sock(sk); | |
924 | ||
e328140f | 925 | return err; |
23070494 GP |
926 | } |
927 | ||
ba3bd0ee GP |
928 | static void l2cap_sock_close_cb(void *data) |
929 | { | |
930 | struct sock *sk = data; | |
931 | ||
932 | l2cap_sock_kill(sk); | |
933 | } | |
934 | ||
89bc500e GP |
935 | static void l2cap_sock_state_change_cb(void *data, int state) |
936 | { | |
937 | struct sock *sk = data; | |
938 | ||
939 | sk->sk_state = state; | |
940 | } | |
941 | ||
2f7719ce | 942 | static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan, |
90338947 | 943 | unsigned long len, int nb) |
2f7719ce | 944 | { |
90338947 GP |
945 | struct sk_buff *skb; |
946 | int err; | |
947 | ||
a6a5568c | 948 | l2cap_chan_unlock(chan); |
90338947 | 949 | skb = bt_skb_send_alloc(chan->sk, len, nb, &err); |
a6a5568c MM |
950 | l2cap_chan_lock(chan); |
951 | ||
90338947 GP |
952 | if (!skb) |
953 | return ERR_PTR(err); | |
2f7719ce | 954 | |
90338947 | 955 | return skb; |
2f7719ce AE |
956 | } |
957 | ||
80808e43 GP |
958 | static struct l2cap_ops l2cap_chan_ops = { |
959 | .name = "L2CAP Socket Interface", | |
960 | .new_connection = l2cap_sock_new_connection_cb, | |
23070494 | 961 | .recv = l2cap_sock_recv_cb, |
ba3bd0ee | 962 | .close = l2cap_sock_close_cb, |
89bc500e | 963 | .state_change = l2cap_sock_state_change_cb, |
2f7719ce | 964 | .alloc_skb = l2cap_sock_alloc_skb_cb, |
80808e43 GP |
965 | }; |
966 | ||
bb58f747 GP |
967 | static void l2cap_sock_destruct(struct sock *sk) |
968 | { | |
969 | BT_DBG("sk %p", sk); | |
970 | ||
61d6ef3e | 971 | l2cap_chan_put(l2cap_pi(sk)->chan); |
e328140f MM |
972 | if (l2cap_pi(sk)->rx_busy_skb) { |
973 | kfree_skb(l2cap_pi(sk)->rx_busy_skb); | |
974 | l2cap_pi(sk)->rx_busy_skb = NULL; | |
975 | } | |
976 | ||
bb58f747 GP |
977 | skb_queue_purge(&sk->sk_receive_queue); |
978 | skb_queue_purge(&sk->sk_write_queue); | |
979 | } | |
980 | ||
80808e43 | 981 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747 GP |
982 | { |
983 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
b4450035 | 984 | struct l2cap_chan *chan = pi->chan; |
bb58f747 GP |
985 | |
986 | BT_DBG("sk %p", sk); | |
987 | ||
988 | if (parent) { | |
b4450035 GP |
989 | struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
990 | ||
bb58f747 | 991 | sk->sk_type = parent->sk_type; |
c5daa683 | 992 | bt_sk(sk)->flags = bt_sk(parent)->flags; |
bb58f747 | 993 | |
715ec005 | 994 | chan->chan_type = pchan->chan_type; |
0c1bc5c6 GP |
995 | chan->imtu = pchan->imtu; |
996 | chan->omtu = pchan->omtu; | |
b4450035 | 997 | chan->conf_state = pchan->conf_state; |
0c1bc5c6 | 998 | chan->mode = pchan->mode; |
47d1ec61 GP |
999 | chan->fcs = pchan->fcs; |
1000 | chan->max_tx = pchan->max_tx; | |
1001 | chan->tx_win = pchan->tx_win; | |
6b3c7104 | 1002 | chan->tx_win_max = pchan->tx_win_max; |
4343478f | 1003 | chan->sec_level = pchan->sec_level; |
d57b0e8b | 1004 | chan->flags = pchan->flags; |
6230c9b4 PM |
1005 | |
1006 | security_sk_clone(parent, sk); | |
bb58f747 | 1007 | } else { |
715ec005 GP |
1008 | |
1009 | switch (sk->sk_type) { | |
1010 | case SOCK_RAW: | |
1011 | chan->chan_type = L2CAP_CHAN_RAW; | |
1012 | break; | |
1013 | case SOCK_DGRAM: | |
1014 | chan->chan_type = L2CAP_CHAN_CONN_LESS; | |
1015 | break; | |
1016 | case SOCK_SEQPACKET: | |
1017 | case SOCK_STREAM: | |
1018 | chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; | |
1019 | break; | |
1020 | } | |
1021 | ||
0c1bc5c6 GP |
1022 | chan->imtu = L2CAP_DEFAULT_MTU; |
1023 | chan->omtu = 0; | |
bb58f747 | 1024 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c6 | 1025 | chan->mode = L2CAP_MODE_ERTM; |
c1360a1c | 1026 | set_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
bb58f747 | 1027 | } else { |
0c1bc5c6 | 1028 | chan->mode = L2CAP_MODE_BASIC; |
bb58f747 | 1029 | } |
bd4b1653 AE |
1030 | |
1031 | l2cap_chan_set_defaults(chan); | |
bb58f747 GP |
1032 | } |
1033 | ||
1034 | /* Default config options */ | |
0c1bc5c6 | 1035 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e43 GP |
1036 | |
1037 | chan->data = sk; | |
1038 | chan->ops = &l2cap_chan_ops; | |
bb58f747 GP |
1039 | } |
1040 | ||
1041 | static struct proto l2cap_proto = { | |
1042 | .name = "L2CAP", | |
1043 | .owner = THIS_MODULE, | |
1044 | .obj_size = sizeof(struct l2cap_pinfo) | |
1045 | }; | |
1046 | ||
80808e43 | 1047 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
bb58f747 GP |
1048 | { |
1049 | struct sock *sk; | |
dc50a06d | 1050 | struct l2cap_chan *chan; |
bb58f747 GP |
1051 | |
1052 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); | |
1053 | if (!sk) | |
1054 | return NULL; | |
1055 | ||
1056 | sock_init_data(sock, sk); | |
1057 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
1058 | ||
1059 | sk->sk_destruct = l2cap_sock_destruct; | |
ba13ccd9 | 1060 | sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; |
bb58f747 GP |
1061 | |
1062 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1063 | ||
1064 | sk->sk_protocol = proto; | |
1065 | sk->sk_state = BT_OPEN; | |
1066 | ||
eef1d9b6 | 1067 | chan = l2cap_chan_create(); |
dc50a06d GP |
1068 | if (!chan) { |
1069 | l2cap_sock_kill(sk); | |
1070 | return NULL; | |
1071 | } | |
1072 | ||
61d6ef3e MM |
1073 | l2cap_chan_hold(chan); |
1074 | ||
eef1d9b6 GP |
1075 | chan->sk = sk; |
1076 | ||
dc50a06d GP |
1077 | l2cap_pi(sk)->chan = chan; |
1078 | ||
bb58f747 GP |
1079 | return sk; |
1080 | } | |
1081 | ||
1082 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
1083 | int kern) | |
1084 | { | |
1085 | struct sock *sk; | |
1086 | ||
1087 | BT_DBG("sock %p", sock); | |
1088 | ||
1089 | sock->state = SS_UNCONNECTED; | |
1090 | ||
1091 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
1092 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
1093 | return -ESOCKTNOSUPPORT; | |
1094 | ||
1095 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
1096 | return -EPERM; | |
1097 | ||
1098 | sock->ops = &l2cap_sock_ops; | |
1099 | ||
1100 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); | |
1101 | if (!sk) | |
1102 | return -ENOMEM; | |
1103 | ||
1104 | l2cap_sock_init(sk, NULL); | |
1105 | return 0; | |
1106 | } | |
1107 | ||
cf2f90f5 | 1108 | static const struct proto_ops l2cap_sock_ops = { |
65390587 GP |
1109 | .family = PF_BLUETOOTH, |
1110 | .owner = THIS_MODULE, | |
1111 | .release = l2cap_sock_release, | |
1112 | .bind = l2cap_sock_bind, | |
1113 | .connect = l2cap_sock_connect, | |
1114 | .listen = l2cap_sock_listen, | |
1115 | .accept = l2cap_sock_accept, | |
1116 | .getname = l2cap_sock_getname, | |
1117 | .sendmsg = l2cap_sock_sendmsg, | |
1118 | .recvmsg = l2cap_sock_recvmsg, | |
1119 | .poll = bt_sock_poll, | |
1120 | .ioctl = bt_sock_ioctl, | |
1121 | .mmap = sock_no_mmap, | |
1122 | .socketpair = sock_no_socketpair, | |
1123 | .shutdown = l2cap_sock_shutdown, | |
1124 | .setsockopt = l2cap_sock_setsockopt, | |
1125 | .getsockopt = l2cap_sock_getsockopt | |
1126 | }; | |
1127 | ||
bb58f747 GP |
1128 | static const struct net_proto_family l2cap_sock_family_ops = { |
1129 | .family = PF_BLUETOOTH, | |
1130 | .owner = THIS_MODULE, | |
1131 | .create = l2cap_sock_create, | |
1132 | }; | |
1133 | ||
1134 | int __init l2cap_init_sockets(void) | |
1135 | { | |
e2174ca4 | 1136 | int err; |
bb58f747 | 1137 | |
e2174ca4 GP |
1138 | err = proto_register(&l2cap_proto, 0); |
1139 | if (err < 0) | |
1140 | return err; | |
bb58f747 | 1141 | |
e2174ca4 GP |
1142 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
1143 | if (err < 0) | |
1144 | goto error; | |
bb58f747 | 1145 | |
e2174ca4 | 1146 | BT_INFO("L2CAP socket layer initialized"); |
bb58f747 | 1147 | |
e2174ca4 | 1148 | return 0; |
bb58f747 GP |
1149 | |
1150 | error: | |
e2174ca4 GP |
1151 | BT_ERR("L2CAP socket registration failed"); |
1152 | proto_unregister(&l2cap_proto); | |
1153 | return err; | |
bb58f747 GP |
1154 | } |
1155 | ||
1156 | void l2cap_cleanup_sockets(void) | |
1157 | { | |
e2174ca4 GP |
1158 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) |
1159 | BT_ERR("L2CAP socket unregistration failed"); | |
bb58f747 | 1160 | |
e2174ca4 | 1161 | proto_unregister(&l2cap_proto); |
bb58f747 | 1162 | } |