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 | ||
6230c9b4 PM |
29 | #include <linux/security.h> |
30 | ||
bb58f747 | 31 | #include <net/bluetooth/bluetooth.h> |
33575df7 | 32 | #include <net/bluetooth/hci_core.h> |
bb58f747 | 33 | #include <net/bluetooth/l2cap.h> |
f1cb9af5 | 34 | #include <net/bluetooth/smp.h> |
bb58f747 | 35 | |
cf2f90f5 | 36 | static const struct proto_ops l2cap_sock_ops; |
80808e43 GP |
37 | static void l2cap_sock_init(struct sock *sk, struct sock *parent); |
38 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio); | |
cf2f90f5 | 39 | |
af6bcd82 GP |
40 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
41 | { | |
42 | struct sock *sk = sock->sk; | |
4343478f | 43 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
44 | struct sockaddr_l2 la; |
45 | int len, err = 0; | |
46 | ||
47 | BT_DBG("sk %p", sk); | |
48 | ||
49 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
50 | return -EINVAL; | |
51 | ||
52 | memset(&la, 0, sizeof(la)); | |
53 | len = min_t(unsigned int, sizeof(la), alen); | |
54 | memcpy(&la, addr, len); | |
55 | ||
b62f328b | 56 | if (la.l2_cid && la.l2_psm) |
af6bcd82 GP |
57 | return -EINVAL; |
58 | ||
59 | lock_sock(sk); | |
60 | ||
61 | if (sk->sk_state != BT_OPEN) { | |
62 | err = -EBADFD; | |
63 | goto done; | |
64 | } | |
65 | ||
66 | if (la.l2_psm) { | |
67 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
68 | ||
69 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
70 | if ((psm & 0x0101) != 0x0001) { | |
71 | err = -EINVAL; | |
72 | goto done; | |
73 | } | |
74 | ||
75 | /* Restrict usage of well-known PSMs */ | |
76 | if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { | |
77 | err = -EACCES; | |
78 | goto done; | |
79 | } | |
80 | } | |
81 | ||
9e4425ff GP |
82 | if (la.l2_cid) |
83 | err = l2cap_add_scid(chan, la.l2_cid); | |
84 | else | |
85 | err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm); | |
af6bcd82 | 86 | |
9e4425ff GP |
87 | if (err < 0) |
88 | goto done; | |
af6bcd82 | 89 | |
9e4425ff GP |
90 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || |
91 | __le16_to_cpu(la.l2_psm) == 0x0003) | |
92 | chan->sec_level = BT_SECURITY_SDP; | |
b62f328b | 93 | |
9e4425ff | 94 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
89bc500e GP |
95 | |
96 | chan->state = BT_BOUND; | |
9e4425ff | 97 | sk->sk_state = BT_BOUND; |
af6bcd82 GP |
98 | |
99 | done: | |
100 | release_sock(sk); | |
101 | return err; | |
102 | } | |
103 | ||
4e34c50b GP |
104 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) |
105 | { | |
106 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 107 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
4e34c50b GP |
108 | struct sockaddr_l2 la; |
109 | int len, err = 0; | |
110 | ||
111 | BT_DBG("sk %p", sk); | |
112 | ||
113 | if (!addr || alen < sizeof(addr->sa_family) || | |
114 | addr->sa_family != AF_BLUETOOTH) | |
115 | return -EINVAL; | |
116 | ||
117 | memset(&la, 0, sizeof(la)); | |
118 | len = min_t(unsigned int, sizeof(la), alen); | |
119 | memcpy(&la, addr, len); | |
120 | ||
acd7d370 | 121 | if (la.l2_cid && la.l2_psm) |
4e34c50b GP |
122 | return -EINVAL; |
123 | ||
124 | lock_sock(sk); | |
125 | ||
715ec005 | 126 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED |
acd7d370 | 127 | && !(la.l2_psm || la.l2_cid)) { |
4e34c50b GP |
128 | err = -EINVAL; |
129 | goto done; | |
130 | } | |
131 | ||
0c1bc5c6 | 132 | switch (chan->mode) { |
4e34c50b GP |
133 | case L2CAP_MODE_BASIC: |
134 | break; | |
135 | case L2CAP_MODE_ERTM: | |
136 | case L2CAP_MODE_STREAMING: | |
137 | if (!disable_ertm) | |
138 | break; | |
139 | /* fall through */ | |
140 | default: | |
141 | err = -ENOTSUPP; | |
142 | goto done; | |
143 | } | |
144 | ||
145 | switch (sk->sk_state) { | |
146 | case BT_CONNECT: | |
147 | case BT_CONNECT2: | |
148 | case BT_CONFIG: | |
149 | /* Already connecting */ | |
150 | goto wait; | |
151 | ||
152 | case BT_CONNECTED: | |
153 | /* Already connected */ | |
154 | err = -EISCONN; | |
155 | goto done; | |
156 | ||
157 | case BT_OPEN: | |
158 | case BT_BOUND: | |
159 | /* Can connect */ | |
160 | break; | |
161 | ||
162 | default: | |
163 | err = -EBADFD; | |
164 | goto done; | |
165 | } | |
166 | ||
167 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
715ec005 GP |
168 | if ((__le16_to_cpu(la.l2_psm) & 0x0101) != 0x0001 && !la.l2_cid && |
169 | chan->chan_type != L2CAP_CHAN_RAW) { | |
4e34c50b GP |
170 | err = -EINVAL; |
171 | goto done; | |
172 | } | |
173 | ||
174 | /* Set destination address and psm */ | |
175 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); | |
fe4128e0 GP |
176 | chan->psm = la.l2_psm; |
177 | chan->dcid = la.l2_cid; | |
4e34c50b | 178 | |
77a74c7e | 179 | err = l2cap_chan_connect(l2cap_pi(sk)->chan); |
4e34c50b GP |
180 | if (err) |
181 | goto done; | |
182 | ||
183 | wait: | |
184 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
185 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
186 | done: | |
187 | release_sock(sk); | |
188 | return err; | |
189 | } | |
190 | ||
af6bcd82 GP |
191 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
192 | { | |
193 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 194 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
195 | int err = 0; |
196 | ||
197 | BT_DBG("sk %p backlog %d", sk, backlog); | |
198 | ||
199 | lock_sock(sk); | |
200 | ||
201 | if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) | |
202 | || sk->sk_state != BT_BOUND) { | |
203 | err = -EBADFD; | |
204 | goto done; | |
205 | } | |
206 | ||
0c1bc5c6 | 207 | switch (chan->mode) { |
af6bcd82 GP |
208 | case L2CAP_MODE_BASIC: |
209 | break; | |
210 | case L2CAP_MODE_ERTM: | |
211 | case L2CAP_MODE_STREAMING: | |
212 | if (!disable_ertm) | |
213 | break; | |
214 | /* fall through */ | |
215 | default: | |
216 | err = -ENOTSUPP; | |
217 | goto done; | |
218 | } | |
219 | ||
af6bcd82 GP |
220 | sk->sk_max_ack_backlog = backlog; |
221 | sk->sk_ack_backlog = 0; | |
89bc500e GP |
222 | |
223 | chan->state = BT_LISTEN; | |
af6bcd82 GP |
224 | sk->sk_state = BT_LISTEN; |
225 | ||
226 | done: | |
227 | release_sock(sk); | |
228 | return err; | |
229 | } | |
230 | ||
c47b7c72 GP |
231 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) |
232 | { | |
233 | DECLARE_WAITQUEUE(wait, current); | |
234 | struct sock *sk = sock->sk, *nsk; | |
235 | long timeo; | |
236 | int err = 0; | |
237 | ||
238 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
239 | ||
c47b7c72 GP |
240 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
241 | ||
242 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
243 | ||
244 | /* Wait for an incoming connection. (wake-one). */ | |
245 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
f9a3c20a | 246 | while (1) { |
c47b7c72 | 247 | set_current_state(TASK_INTERRUPTIBLE); |
f9a3c20a PH |
248 | |
249 | if (sk->sk_state != BT_LISTEN) { | |
250 | err = -EBADFD; | |
c47b7c72 GP |
251 | break; |
252 | } | |
253 | ||
f9a3c20a PH |
254 | nsk = bt_accept_dequeue(sk, newsock); |
255 | if (nsk) | |
256 | break; | |
c47b7c72 | 257 | |
f9a3c20a PH |
258 | if (!timeo) { |
259 | err = -EAGAIN; | |
c47b7c72 GP |
260 | break; |
261 | } | |
262 | ||
263 | if (signal_pending(current)) { | |
264 | err = sock_intr_errno(timeo); | |
265 | break; | |
266 | } | |
f9a3c20a PH |
267 | |
268 | release_sock(sk); | |
269 | timeo = schedule_timeout(timeo); | |
270 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
c47b7c72 | 271 | } |
f9a3c20a | 272 | __set_current_state(TASK_RUNNING); |
c47b7c72 GP |
273 | remove_wait_queue(sk_sleep(sk), &wait); |
274 | ||
275 | if (err) | |
276 | goto done; | |
277 | ||
278 | newsock->state = SS_CONNECTED; | |
279 | ||
280 | BT_DBG("new socket %p", nsk); | |
281 | ||
282 | done: | |
283 | release_sock(sk); | |
284 | return err; | |
285 | } | |
286 | ||
d7175d55 GP |
287 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) |
288 | { | |
289 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
290 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 291 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
d7175d55 GP |
292 | |
293 | BT_DBG("sock %p, sk %p", sock, sk); | |
294 | ||
295 | addr->sa_family = AF_BLUETOOTH; | |
296 | *len = sizeof(struct sockaddr_l2); | |
297 | ||
298 | if (peer) { | |
fe4128e0 | 299 | la->l2_psm = chan->psm; |
d7175d55 | 300 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
fe4128e0 | 301 | la->l2_cid = cpu_to_le16(chan->dcid); |
d7175d55 | 302 | } else { |
0c1bc5c6 | 303 | la->l2_psm = chan->sport; |
d7175d55 | 304 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
fe4128e0 | 305 | la->l2_cid = cpu_to_le16(chan->scid); |
d7175d55 GP |
306 | } |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
99f4808d GP |
311 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
312 | { | |
313 | struct sock *sk = sock->sk; | |
4343478f | 314 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d GP |
315 | struct l2cap_options opts; |
316 | struct l2cap_conninfo cinfo; | |
317 | int len, err = 0; | |
318 | u32 opt; | |
319 | ||
320 | BT_DBG("sk %p", sk); | |
321 | ||
322 | if (get_user(len, optlen)) | |
323 | return -EFAULT; | |
324 | ||
325 | lock_sock(sk); | |
326 | ||
327 | switch (optname) { | |
328 | case L2CAP_OPTIONS: | |
e3fb592b | 329 | memset(&opts, 0, sizeof(opts)); |
0c1bc5c6 GP |
330 | opts.imtu = chan->imtu; |
331 | opts.omtu = chan->omtu; | |
332 | opts.flush_to = chan->flush_to; | |
333 | opts.mode = chan->mode; | |
47d1ec61 GP |
334 | opts.fcs = chan->fcs; |
335 | opts.max_tx = chan->max_tx; | |
336 | opts.txwin_size = (__u16)chan->tx_win; | |
99f4808d GP |
337 | |
338 | len = min_t(unsigned int, len, sizeof(opts)); | |
339 | if (copy_to_user(optval, (char *) &opts, len)) | |
340 | err = -EFAULT; | |
341 | ||
342 | break; | |
343 | ||
344 | case L2CAP_LM: | |
4343478f | 345 | switch (chan->sec_level) { |
99f4808d GP |
346 | case BT_SECURITY_LOW: |
347 | opt = L2CAP_LM_AUTH; | |
348 | break; | |
349 | case BT_SECURITY_MEDIUM: | |
350 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
351 | break; | |
352 | case BT_SECURITY_HIGH: | |
353 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
354 | L2CAP_LM_SECURE; | |
355 | break; | |
356 | default: | |
357 | opt = 0; | |
358 | break; | |
359 | } | |
360 | ||
4343478f | 361 | if (chan->role_switch) |
99f4808d GP |
362 | opt |= L2CAP_LM_MASTER; |
363 | ||
4343478f | 364 | if (chan->force_reliable) |
99f4808d GP |
365 | opt |= L2CAP_LM_RELIABLE; |
366 | ||
367 | if (put_user(opt, (u32 __user *) optval)) | |
368 | err = -EFAULT; | |
369 | break; | |
370 | ||
371 | case L2CAP_CONNINFO: | |
372 | if (sk->sk_state != BT_CONNECTED && | |
373 | !(sk->sk_state == BT_CONNECT2 && | |
374 | bt_sk(sk)->defer_setup)) { | |
375 | err = -ENOTCONN; | |
376 | break; | |
377 | } | |
378 | ||
8d03e971 | 379 | memset(&cinfo, 0, sizeof(cinfo)); |
8c1d787b GP |
380 | cinfo.hci_handle = chan->conn->hcon->handle; |
381 | memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); | |
99f4808d GP |
382 | |
383 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
384 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
385 | err = -EFAULT; | |
386 | ||
387 | break; | |
388 | ||
389 | default: | |
390 | err = -ENOPROTOOPT; | |
391 | break; | |
392 | } | |
393 | ||
394 | release_sock(sk); | |
395 | return err; | |
396 | } | |
397 | ||
398 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
399 | { | |
400 | struct sock *sk = sock->sk; | |
4343478f | 401 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d | 402 | struct bt_security sec; |
14b12d0b | 403 | struct bt_power pwr; |
99f4808d GP |
404 | int len, err = 0; |
405 | ||
406 | BT_DBG("sk %p", sk); | |
407 | ||
408 | if (level == SOL_L2CAP) | |
409 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
410 | ||
411 | if (level != SOL_BLUETOOTH) | |
412 | return -ENOPROTOOPT; | |
413 | ||
414 | if (get_user(len, optlen)) | |
415 | return -EFAULT; | |
416 | ||
417 | lock_sock(sk); | |
418 | ||
419 | switch (optname) { | |
420 | case BT_SECURITY: | |
715ec005 GP |
421 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
422 | chan->chan_type != L2CAP_CHAN_RAW) { | |
99f4808d GP |
423 | err = -EINVAL; |
424 | break; | |
425 | } | |
426 | ||
8f360119 | 427 | memset(&sec, 0, sizeof(sec)); |
4343478f | 428 | sec.level = chan->sec_level; |
99f4808d | 429 | |
8f360119 VCG |
430 | if (sk->sk_state == BT_CONNECTED) |
431 | sec.key_size = chan->conn->hcon->enc_key_size; | |
432 | ||
99f4808d GP |
433 | len = min_t(unsigned int, len, sizeof(sec)); |
434 | if (copy_to_user(optval, (char *) &sec, len)) | |
435 | err = -EFAULT; | |
436 | ||
437 | break; | |
438 | ||
439 | case BT_DEFER_SETUP: | |
440 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
441 | err = -EINVAL; | |
442 | break; | |
443 | } | |
444 | ||
445 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
446 | err = -EFAULT; | |
447 | ||
448 | break; | |
449 | ||
450 | case BT_FLUSHABLE: | |
4343478f | 451 | if (put_user(chan->flushable, (u32 __user *) optval)) |
99f4808d GP |
452 | err = -EFAULT; |
453 | ||
454 | break; | |
455 | ||
14b12d0b JG |
456 | case BT_POWER: |
457 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
458 | && sk->sk_type != SOCK_RAW) { | |
459 | err = -EINVAL; | |
460 | break; | |
461 | } | |
462 | ||
463 | pwr.force_active = chan->force_active; | |
464 | ||
465 | len = min_t(unsigned int, len, sizeof(pwr)); | |
466 | if (copy_to_user(optval, (char *) &pwr, len)) | |
467 | err = -EFAULT; | |
468 | ||
469 | break; | |
470 | ||
99f4808d GP |
471 | default: |
472 | err = -ENOPROTOOPT; | |
473 | break; | |
474 | } | |
475 | ||
476 | release_sock(sk); | |
477 | return err; | |
478 | } | |
479 | ||
33575df7 GP |
480 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
481 | { | |
482 | struct sock *sk = sock->sk; | |
b4450035 | 483 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 GP |
484 | struct l2cap_options opts; |
485 | int len, err = 0; | |
486 | u32 opt; | |
487 | ||
488 | BT_DBG("sk %p", sk); | |
489 | ||
490 | lock_sock(sk); | |
491 | ||
492 | switch (optname) { | |
493 | case L2CAP_OPTIONS: | |
494 | if (sk->sk_state == BT_CONNECTED) { | |
495 | err = -EINVAL; | |
496 | break; | |
497 | } | |
498 | ||
0c1bc5c6 GP |
499 | opts.imtu = chan->imtu; |
500 | opts.omtu = chan->omtu; | |
501 | opts.flush_to = chan->flush_to; | |
502 | opts.mode = chan->mode; | |
47d1ec61 GP |
503 | opts.fcs = chan->fcs; |
504 | opts.max_tx = chan->max_tx; | |
505 | opts.txwin_size = (__u16)chan->tx_win; | |
33575df7 GP |
506 | |
507 | len = min_t(unsigned int, sizeof(opts), optlen); | |
508 | if (copy_from_user((char *) &opts, optval, len)) { | |
509 | err = -EFAULT; | |
510 | break; | |
511 | } | |
512 | ||
513 | if (opts.txwin_size > L2CAP_DEFAULT_TX_WINDOW) { | |
514 | err = -EINVAL; | |
515 | break; | |
516 | } | |
517 | ||
0c1bc5c6 GP |
518 | chan->mode = opts.mode; |
519 | switch (chan->mode) { | |
33575df7 | 520 | case L2CAP_MODE_BASIC: |
c1360a1c | 521 | clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
33575df7 GP |
522 | break; |
523 | case L2CAP_MODE_ERTM: | |
524 | case L2CAP_MODE_STREAMING: | |
525 | if (!disable_ertm) | |
526 | break; | |
527 | /* fall through */ | |
528 | default: | |
529 | err = -EINVAL; | |
530 | break; | |
531 | } | |
532 | ||
0c1bc5c6 GP |
533 | chan->imtu = opts.imtu; |
534 | chan->omtu = opts.omtu; | |
47d1ec61 GP |
535 | chan->fcs = opts.fcs; |
536 | chan->max_tx = opts.max_tx; | |
537 | chan->tx_win = (__u8)opts.txwin_size; | |
33575df7 GP |
538 | break; |
539 | ||
540 | case L2CAP_LM: | |
541 | if (get_user(opt, (u32 __user *) optval)) { | |
542 | err = -EFAULT; | |
543 | break; | |
544 | } | |
545 | ||
546 | if (opt & L2CAP_LM_AUTH) | |
4343478f | 547 | chan->sec_level = BT_SECURITY_LOW; |
33575df7 | 548 | if (opt & L2CAP_LM_ENCRYPT) |
4343478f | 549 | chan->sec_level = BT_SECURITY_MEDIUM; |
33575df7 | 550 | if (opt & L2CAP_LM_SECURE) |
4343478f | 551 | chan->sec_level = BT_SECURITY_HIGH; |
33575df7 | 552 | |
4343478f GP |
553 | chan->role_switch = (opt & L2CAP_LM_MASTER); |
554 | chan->force_reliable = (opt & L2CAP_LM_RELIABLE); | |
33575df7 GP |
555 | break; |
556 | ||
557 | default: | |
558 | err = -ENOPROTOOPT; | |
559 | break; | |
560 | } | |
561 | ||
562 | release_sock(sk); | |
563 | return err; | |
564 | } | |
565 | ||
566 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) | |
567 | { | |
568 | struct sock *sk = sock->sk; | |
4343478f | 569 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 | 570 | struct bt_security sec; |
14b12d0b | 571 | struct bt_power pwr; |
f1cb9af5 | 572 | struct l2cap_conn *conn; |
33575df7 GP |
573 | int len, err = 0; |
574 | u32 opt; | |
575 | ||
576 | BT_DBG("sk %p", sk); | |
577 | ||
578 | if (level == SOL_L2CAP) | |
579 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
580 | ||
581 | if (level != SOL_BLUETOOTH) | |
582 | return -ENOPROTOOPT; | |
583 | ||
584 | lock_sock(sk); | |
585 | ||
586 | switch (optname) { | |
587 | case BT_SECURITY: | |
715ec005 GP |
588 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
589 | chan->chan_type != L2CAP_CHAN_RAW) { | |
33575df7 GP |
590 | err = -EINVAL; |
591 | break; | |
592 | } | |
593 | ||
594 | sec.level = BT_SECURITY_LOW; | |
595 | ||
596 | len = min_t(unsigned int, sizeof(sec), optlen); | |
597 | if (copy_from_user((char *) &sec, optval, len)) { | |
598 | err = -EFAULT; | |
599 | break; | |
600 | } | |
601 | ||
602 | if (sec.level < BT_SECURITY_LOW || | |
603 | sec.level > BT_SECURITY_HIGH) { | |
604 | err = -EINVAL; | |
605 | break; | |
606 | } | |
607 | ||
4343478f | 608 | chan->sec_level = sec.level; |
f1cb9af5 VCG |
609 | |
610 | conn = chan->conn; | |
611 | if (conn && chan->scid == L2CAP_CID_LE_DATA) { | |
612 | if (!conn->hcon->out) { | |
613 | err = -EINVAL; | |
614 | break; | |
615 | } | |
616 | ||
617 | if (smp_conn_security(conn, sec.level)) | |
618 | break; | |
619 | ||
620 | err = 0; | |
621 | sk->sk_state = BT_CONFIG; | |
622 | } | |
33575df7 GP |
623 | break; |
624 | ||
625 | case BT_DEFER_SETUP: | |
626 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
627 | err = -EINVAL; | |
628 | break; | |
629 | } | |
630 | ||
631 | if (get_user(opt, (u32 __user *) optval)) { | |
632 | err = -EFAULT; | |
633 | break; | |
634 | } | |
635 | ||
636 | bt_sk(sk)->defer_setup = opt; | |
637 | break; | |
638 | ||
639 | case BT_FLUSHABLE: | |
640 | if (get_user(opt, (u32 __user *) optval)) { | |
641 | err = -EFAULT; | |
642 | break; | |
643 | } | |
644 | ||
645 | if (opt > BT_FLUSHABLE_ON) { | |
646 | err = -EINVAL; | |
647 | break; | |
648 | } | |
649 | ||
650 | if (opt == BT_FLUSHABLE_OFF) { | |
8c1d787b | 651 | struct l2cap_conn *conn = chan->conn; |
25985edc | 652 | /* proceed further only when we have l2cap_conn and |
33575df7 GP |
653 | No Flush support in the LM */ |
654 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { | |
655 | err = -EINVAL; | |
656 | break; | |
657 | } | |
658 | } | |
659 | ||
4343478f | 660 | chan->flushable = opt; |
33575df7 GP |
661 | break; |
662 | ||
14b12d0b JG |
663 | case BT_POWER: |
664 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && | |
665 | chan->chan_type != L2CAP_CHAN_RAW) { | |
666 | err = -EINVAL; | |
667 | break; | |
668 | } | |
669 | ||
670 | pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; | |
671 | ||
672 | len = min_t(unsigned int, sizeof(pwr), optlen); | |
673 | if (copy_from_user((char *) &pwr, optval, len)) { | |
674 | err = -EFAULT; | |
675 | break; | |
676 | } | |
677 | chan->force_active = pwr.force_active; | |
678 | break; | |
679 | ||
33575df7 GP |
680 | default: |
681 | err = -ENOPROTOOPT; | |
682 | break; | |
683 | } | |
684 | ||
685 | release_sock(sk); | |
686 | return err; | |
687 | } | |
fd83ccdb GP |
688 | |
689 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) | |
690 | { | |
691 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 692 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb GP |
693 | int err; |
694 | ||
695 | BT_DBG("sock %p, sk %p", sock, sk); | |
696 | ||
697 | err = sock_error(sk); | |
698 | if (err) | |
699 | return err; | |
700 | ||
701 | if (msg->msg_flags & MSG_OOB) | |
702 | return -EOPNOTSUPP; | |
703 | ||
704 | lock_sock(sk); | |
705 | ||
706 | if (sk->sk_state != BT_CONNECTED) { | |
9a91a04a GP |
707 | release_sock(sk); |
708 | return -ENOTCONN; | |
fd83ccdb GP |
709 | } |
710 | ||
9a91a04a | 711 | err = l2cap_chan_send(chan, msg, len); |
fd83ccdb | 712 | |
fd83ccdb GP |
713 | release_sock(sk); |
714 | return err; | |
715 | } | |
33575df7 | 716 | |
68983259 GP |
717 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
718 | { | |
719 | struct sock *sk = sock->sk; | |
e328140f MM |
720 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
721 | int err; | |
68983259 GP |
722 | |
723 | lock_sock(sk); | |
724 | ||
725 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { | |
8c1d787b GP |
726 | sk->sk_state = BT_CONFIG; |
727 | ||
e328140f | 728 | __l2cap_connect_rsp_defer(pi->chan); |
68983259 GP |
729 | release_sock(sk); |
730 | return 0; | |
731 | } | |
732 | ||
733 | release_sock(sk); | |
734 | ||
735 | if (sock->type == SOCK_STREAM) | |
e328140f MM |
736 | err = bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); |
737 | else | |
738 | err = bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
739 | ||
740 | if (pi->chan->mode != L2CAP_MODE_ERTM) | |
741 | return err; | |
742 | ||
743 | /* Attempt to put pending rx data in the socket buffer */ | |
744 | ||
745 | lock_sock(sk); | |
746 | ||
747 | if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state)) | |
748 | goto done; | |
749 | ||
750 | if (pi->rx_busy_skb) { | |
751 | if (!sock_queue_rcv_skb(sk, pi->rx_busy_skb)) | |
752 | pi->rx_busy_skb = NULL; | |
753 | else | |
754 | goto done; | |
755 | } | |
756 | ||
757 | /* Restore data flow when half of the receive buffer is | |
758 | * available. This avoids resending large numbers of | |
759 | * frames. | |
760 | */ | |
761 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1) | |
762 | l2cap_chan_busy(pi->chan, 0); | |
68983259 | 763 | |
e328140f MM |
764 | done: |
765 | release_sock(sk); | |
766 | return err; | |
68983259 GP |
767 | } |
768 | ||
05fc1576 GP |
769 | /* Kill socket (only if zapped and orphan) |
770 | * Must be called on unlocked socket. | |
771 | */ | |
ba3bd0ee | 772 | static void l2cap_sock_kill(struct sock *sk) |
05fc1576 GP |
773 | { |
774 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
775 | return; | |
776 | ||
777 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
778 | ||
779 | /* Kill poor orphan */ | |
6ff5abbf | 780 | |
23691d75 | 781 | l2cap_chan_destroy(l2cap_pi(sk)->chan); |
05fc1576 GP |
782 | sock_set_flag(sk, SOCK_DEAD); |
783 | sock_put(sk); | |
784 | } | |
785 | ||
dcba0dba GP |
786 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
787 | { | |
788 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 789 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
dcba0dba GP |
790 | int err = 0; |
791 | ||
792 | BT_DBG("sock %p, sk %p", sock, sk); | |
793 | ||
794 | if (!sk) | |
795 | return 0; | |
796 | ||
797 | lock_sock(sk); | |
798 | if (!sk->sk_shutdown) { | |
0c1bc5c6 | 799 | if (chan->mode == L2CAP_MODE_ERTM) |
dcba0dba GP |
800 | err = __l2cap_wait_ack(sk); |
801 | ||
802 | sk->sk_shutdown = SHUTDOWN_MASK; | |
0f852724 | 803 | l2cap_chan_close(chan, 0); |
dcba0dba GP |
804 | |
805 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
806 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
807 | sk->sk_lingertime); | |
808 | } | |
809 | ||
810 | if (!err && sk->sk_err) | |
811 | err = -sk->sk_err; | |
812 | ||
813 | release_sock(sk); | |
814 | return err; | |
815 | } | |
816 | ||
554f05bb GP |
817 | static int l2cap_sock_release(struct socket *sock) |
818 | { | |
819 | struct sock *sk = sock->sk; | |
820 | int err; | |
821 | ||
822 | BT_DBG("sock %p, sk %p", sock, sk); | |
823 | ||
824 | if (!sk) | |
825 | return 0; | |
826 | ||
827 | err = l2cap_sock_shutdown(sock, 2); | |
828 | ||
829 | sock_orphan(sk); | |
830 | l2cap_sock_kill(sk); | |
831 | return err; | |
832 | } | |
833 | ||
80808e43 GP |
834 | static struct l2cap_chan *l2cap_sock_new_connection_cb(void *data) |
835 | { | |
836 | struct sock *sk, *parent = data; | |
837 | ||
838 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, | |
839 | GFP_ATOMIC); | |
840 | if (!sk) | |
841 | return NULL; | |
842 | ||
843 | l2cap_sock_init(sk, parent); | |
844 | ||
845 | return l2cap_pi(sk)->chan; | |
846 | } | |
847 | ||
23070494 GP |
848 | static int l2cap_sock_recv_cb(void *data, struct sk_buff *skb) |
849 | { | |
e328140f | 850 | int err; |
23070494 | 851 | struct sock *sk = data; |
e328140f MM |
852 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
853 | ||
854 | if (pi->rx_busy_skb) | |
855 | return -ENOMEM; | |
856 | ||
857 | err = sock_queue_rcv_skb(sk, skb); | |
858 | ||
859 | /* For ERTM, handle one skb that doesn't fit into the recv | |
860 | * buffer. This is important to do because the data frames | |
861 | * have already been acked, so the skb cannot be discarded. | |
862 | * | |
863 | * Notify the l2cap core that the buffer is full, so the | |
864 | * LOCAL_BUSY state is entered and no more frames are | |
865 | * acked and reassembled until there is buffer space | |
866 | * available. | |
867 | */ | |
868 | if (err < 0 && pi->chan->mode == L2CAP_MODE_ERTM) { | |
869 | pi->rx_busy_skb = skb; | |
870 | l2cap_chan_busy(pi->chan, 1); | |
871 | err = 0; | |
872 | } | |
23070494 | 873 | |
e328140f | 874 | return err; |
23070494 GP |
875 | } |
876 | ||
ba3bd0ee GP |
877 | static void l2cap_sock_close_cb(void *data) |
878 | { | |
879 | struct sock *sk = data; | |
880 | ||
881 | l2cap_sock_kill(sk); | |
882 | } | |
883 | ||
89bc500e GP |
884 | static void l2cap_sock_state_change_cb(void *data, int state) |
885 | { | |
886 | struct sock *sk = data; | |
887 | ||
888 | sk->sk_state = state; | |
889 | } | |
890 | ||
80808e43 GP |
891 | static struct l2cap_ops l2cap_chan_ops = { |
892 | .name = "L2CAP Socket Interface", | |
893 | .new_connection = l2cap_sock_new_connection_cb, | |
23070494 | 894 | .recv = l2cap_sock_recv_cb, |
ba3bd0ee | 895 | .close = l2cap_sock_close_cb, |
89bc500e | 896 | .state_change = l2cap_sock_state_change_cb, |
80808e43 GP |
897 | }; |
898 | ||
bb58f747 GP |
899 | static void l2cap_sock_destruct(struct sock *sk) |
900 | { | |
901 | BT_DBG("sk %p", sk); | |
902 | ||
e328140f MM |
903 | if (l2cap_pi(sk)->rx_busy_skb) { |
904 | kfree_skb(l2cap_pi(sk)->rx_busy_skb); | |
905 | l2cap_pi(sk)->rx_busy_skb = NULL; | |
906 | } | |
907 | ||
bb58f747 GP |
908 | skb_queue_purge(&sk->sk_receive_queue); |
909 | skb_queue_purge(&sk->sk_write_queue); | |
910 | } | |
911 | ||
80808e43 | 912 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747 GP |
913 | { |
914 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
b4450035 | 915 | struct l2cap_chan *chan = pi->chan; |
bb58f747 GP |
916 | |
917 | BT_DBG("sk %p", sk); | |
918 | ||
919 | if (parent) { | |
b4450035 GP |
920 | struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
921 | ||
bb58f747 GP |
922 | sk->sk_type = parent->sk_type; |
923 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; | |
924 | ||
715ec005 | 925 | chan->chan_type = pchan->chan_type; |
0c1bc5c6 GP |
926 | chan->imtu = pchan->imtu; |
927 | chan->omtu = pchan->omtu; | |
b4450035 | 928 | chan->conf_state = pchan->conf_state; |
0c1bc5c6 | 929 | chan->mode = pchan->mode; |
47d1ec61 GP |
930 | chan->fcs = pchan->fcs; |
931 | chan->max_tx = pchan->max_tx; | |
932 | chan->tx_win = pchan->tx_win; | |
4343478f GP |
933 | chan->sec_level = pchan->sec_level; |
934 | chan->role_switch = pchan->role_switch; | |
935 | chan->force_reliable = pchan->force_reliable; | |
936 | chan->flushable = pchan->flushable; | |
14b12d0b | 937 | chan->force_active = pchan->force_active; |
6230c9b4 PM |
938 | |
939 | security_sk_clone(parent, sk); | |
bb58f747 | 940 | } else { |
715ec005 GP |
941 | |
942 | switch (sk->sk_type) { | |
943 | case SOCK_RAW: | |
944 | chan->chan_type = L2CAP_CHAN_RAW; | |
945 | break; | |
946 | case SOCK_DGRAM: | |
947 | chan->chan_type = L2CAP_CHAN_CONN_LESS; | |
948 | break; | |
949 | case SOCK_SEQPACKET: | |
950 | case SOCK_STREAM: | |
951 | chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; | |
952 | break; | |
953 | } | |
954 | ||
0c1bc5c6 GP |
955 | chan->imtu = L2CAP_DEFAULT_MTU; |
956 | chan->omtu = 0; | |
bb58f747 | 957 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c6 | 958 | chan->mode = L2CAP_MODE_ERTM; |
c1360a1c | 959 | set_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
bb58f747 | 960 | } else { |
0c1bc5c6 | 961 | chan->mode = L2CAP_MODE_BASIC; |
bb58f747 | 962 | } |
47d1ec61 GP |
963 | chan->max_tx = L2CAP_DEFAULT_MAX_TX; |
964 | chan->fcs = L2CAP_FCS_CRC16; | |
965 | chan->tx_win = L2CAP_DEFAULT_TX_WINDOW; | |
4343478f GP |
966 | chan->sec_level = BT_SECURITY_LOW; |
967 | chan->role_switch = 0; | |
968 | chan->force_reliable = 0; | |
969 | chan->flushable = BT_FLUSHABLE_OFF; | |
14b12d0b | 970 | chan->force_active = BT_POWER_FORCE_ACTIVE_ON; |
80808e43 | 971 | |
bb58f747 GP |
972 | } |
973 | ||
974 | /* Default config options */ | |
0c1bc5c6 | 975 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e43 GP |
976 | |
977 | chan->data = sk; | |
978 | chan->ops = &l2cap_chan_ops; | |
bb58f747 GP |
979 | } |
980 | ||
981 | static struct proto l2cap_proto = { | |
982 | .name = "L2CAP", | |
983 | .owner = THIS_MODULE, | |
984 | .obj_size = sizeof(struct l2cap_pinfo) | |
985 | }; | |
986 | ||
80808e43 | 987 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
bb58f747 GP |
988 | { |
989 | struct sock *sk; | |
dc50a06d | 990 | struct l2cap_chan *chan; |
bb58f747 GP |
991 | |
992 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); | |
993 | if (!sk) | |
994 | return NULL; | |
995 | ||
996 | sock_init_data(sock, sk); | |
997 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
998 | ||
999 | sk->sk_destruct = l2cap_sock_destruct; | |
6be6b11f | 1000 | sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; |
bb58f747 GP |
1001 | |
1002 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1003 | ||
1004 | sk->sk_protocol = proto; | |
1005 | sk->sk_state = BT_OPEN; | |
1006 | ||
dc50a06d GP |
1007 | chan = l2cap_chan_create(sk); |
1008 | if (!chan) { | |
1009 | l2cap_sock_kill(sk); | |
1010 | return NULL; | |
1011 | } | |
1012 | ||
1013 | l2cap_pi(sk)->chan = chan; | |
1014 | ||
bb58f747 GP |
1015 | return sk; |
1016 | } | |
1017 | ||
1018 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
1019 | int kern) | |
1020 | { | |
1021 | struct sock *sk; | |
1022 | ||
1023 | BT_DBG("sock %p", sock); | |
1024 | ||
1025 | sock->state = SS_UNCONNECTED; | |
1026 | ||
1027 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
1028 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
1029 | return -ESOCKTNOSUPPORT; | |
1030 | ||
1031 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
1032 | return -EPERM; | |
1033 | ||
1034 | sock->ops = &l2cap_sock_ops; | |
1035 | ||
1036 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); | |
1037 | if (!sk) | |
1038 | return -ENOMEM; | |
1039 | ||
1040 | l2cap_sock_init(sk, NULL); | |
1041 | return 0; | |
1042 | } | |
1043 | ||
cf2f90f5 | 1044 | static const struct proto_ops l2cap_sock_ops = { |
65390587 GP |
1045 | .family = PF_BLUETOOTH, |
1046 | .owner = THIS_MODULE, | |
1047 | .release = l2cap_sock_release, | |
1048 | .bind = l2cap_sock_bind, | |
1049 | .connect = l2cap_sock_connect, | |
1050 | .listen = l2cap_sock_listen, | |
1051 | .accept = l2cap_sock_accept, | |
1052 | .getname = l2cap_sock_getname, | |
1053 | .sendmsg = l2cap_sock_sendmsg, | |
1054 | .recvmsg = l2cap_sock_recvmsg, | |
1055 | .poll = bt_sock_poll, | |
1056 | .ioctl = bt_sock_ioctl, | |
1057 | .mmap = sock_no_mmap, | |
1058 | .socketpair = sock_no_socketpair, | |
1059 | .shutdown = l2cap_sock_shutdown, | |
1060 | .setsockopt = l2cap_sock_setsockopt, | |
1061 | .getsockopt = l2cap_sock_getsockopt | |
1062 | }; | |
1063 | ||
bb58f747 GP |
1064 | static const struct net_proto_family l2cap_sock_family_ops = { |
1065 | .family = PF_BLUETOOTH, | |
1066 | .owner = THIS_MODULE, | |
1067 | .create = l2cap_sock_create, | |
1068 | }; | |
1069 | ||
1070 | int __init l2cap_init_sockets(void) | |
1071 | { | |
e2174ca4 | 1072 | int err; |
bb58f747 | 1073 | |
e2174ca4 GP |
1074 | err = proto_register(&l2cap_proto, 0); |
1075 | if (err < 0) | |
1076 | return err; | |
bb58f747 | 1077 | |
e2174ca4 GP |
1078 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
1079 | if (err < 0) | |
1080 | goto error; | |
bb58f747 | 1081 | |
e2174ca4 | 1082 | BT_INFO("L2CAP socket layer initialized"); |
bb58f747 | 1083 | |
e2174ca4 | 1084 | return 0; |
bb58f747 GP |
1085 | |
1086 | error: | |
e2174ca4 GP |
1087 | BT_ERR("L2CAP socket registration failed"); |
1088 | proto_unregister(&l2cap_proto); | |
1089 | return err; | |
bb58f747 GP |
1090 | } |
1091 | ||
1092 | void l2cap_cleanup_sockets(void) | |
1093 | { | |
e2174ca4 GP |
1094 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) |
1095 | BT_ERR("L2CAP socket unregistration failed"); | |
bb58f747 | 1096 | |
e2174ca4 | 1097 | proto_unregister(&l2cap_proto); |
bb58f747 | 1098 | } |