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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 | ||
bc3b2d7f | 30 | #include <linux/export.h> |
6230c9b4 | 31 | |
bb58f747 | 32 | #include <net/bluetooth/bluetooth.h> |
33575df7 | 33 | #include <net/bluetooth/hci_core.h> |
bb58f747 | 34 | #include <net/bluetooth/l2cap.h> |
ac4b7236 MH |
35 | |
36 | #include "smp.h" | |
bb58f747 | 37 | |
5b28d95c MY |
38 | static struct bt_sock_list l2cap_sk_list = { |
39 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) | |
40 | }; | |
41 | ||
cf2f90f5 | 42 | static const struct proto_ops l2cap_sock_ops; |
80808e43 | 43 | static void l2cap_sock_init(struct sock *sk, struct sock *parent); |
2d792818 GP |
44 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
45 | int proto, gfp_t prio); | |
cf2f90f5 | 46 | |
b3916db3 DH |
47 | bool l2cap_is_socket(struct socket *sock) |
48 | { | |
49 | return sock && sock->ops == &l2cap_sock_ops; | |
50 | } | |
51 | EXPORT_SYMBOL(l2cap_is_socket); | |
52 | ||
af6bcd82 GP |
53 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
54 | { | |
55 | struct sock *sk = sock->sk; | |
4343478f | 56 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
57 | struct sockaddr_l2 la; |
58 | int len, err = 0; | |
59 | ||
60 | BT_DBG("sk %p", sk); | |
61 | ||
62 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
63 | return -EINVAL; | |
64 | ||
65 | memset(&la, 0, sizeof(la)); | |
66 | len = min_t(unsigned int, sizeof(la), alen); | |
67 | memcpy(&la, addr, len); | |
68 | ||
b62f328b | 69 | if (la.l2_cid && la.l2_psm) |
af6bcd82 GP |
70 | return -EINVAL; |
71 | ||
72 | lock_sock(sk); | |
73 | ||
74 | if (sk->sk_state != BT_OPEN) { | |
75 | err = -EBADFD; | |
76 | goto done; | |
77 | } | |
78 | ||
79 | if (la.l2_psm) { | |
80 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
81 | ||
82 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
83 | if ((psm & 0x0101) != 0x0001) { | |
84 | err = -EINVAL; | |
85 | goto done; | |
86 | } | |
87 | ||
88 | /* Restrict usage of well-known PSMs */ | |
89 | if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { | |
90 | err = -EACCES; | |
91 | goto done; | |
92 | } | |
93 | } | |
94 | ||
9e4425ff | 95 | if (la.l2_cid) |
6e4aff10 | 96 | err = l2cap_add_scid(chan, __le16_to_cpu(la.l2_cid)); |
9e4425ff GP |
97 | else |
98 | err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm); | |
af6bcd82 | 99 | |
9e4425ff GP |
100 | if (err < 0) |
101 | goto done; | |
af6bcd82 | 102 | |
2983fd68 AE |
103 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_SDP || |
104 | __le16_to_cpu(la.l2_psm) == L2CAP_PSM_RFCOMM) | |
9e4425ff | 105 | chan->sec_level = BT_SECURITY_SDP; |
b62f328b | 106 | |
9e4425ff | 107 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
89bc500e GP |
108 | |
109 | chan->state = BT_BOUND; | |
9e4425ff | 110 | sk->sk_state = BT_BOUND; |
af6bcd82 GP |
111 | |
112 | done: | |
113 | release_sock(sk); | |
114 | return err; | |
115 | } | |
116 | ||
2d792818 GP |
117 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, |
118 | int alen, int flags) | |
4e34c50b GP |
119 | { |
120 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 121 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
4e34c50b GP |
122 | struct sockaddr_l2 la; |
123 | int len, err = 0; | |
124 | ||
125 | BT_DBG("sk %p", sk); | |
126 | ||
127 | if (!addr || alen < sizeof(addr->sa_family) || | |
128 | addr->sa_family != AF_BLUETOOTH) | |
129 | return -EINVAL; | |
130 | ||
131 | memset(&la, 0, sizeof(la)); | |
132 | len = min_t(unsigned int, sizeof(la), alen); | |
133 | memcpy(&la, addr, len); | |
134 | ||
acd7d370 | 135 | if (la.l2_cid && la.l2_psm) |
4e34c50b GP |
136 | return -EINVAL; |
137 | ||
6e4aff10 | 138 | err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid), |
8e9f9892 | 139 | &la.l2_bdaddr, la.l2_bdaddr_type); |
4e34c50b | 140 | if (err) |
b3fb611e | 141 | return err; |
4e34c50b | 142 | |
6be36555 AE |
143 | lock_sock(sk); |
144 | ||
4e34c50b | 145 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
2d792818 | 146 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
b3fb611e AE |
147 | |
148 | release_sock(sk); | |
149 | ||
4e34c50b GP |
150 | return err; |
151 | } | |
152 | ||
af6bcd82 GP |
153 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
154 | { | |
155 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 156 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
157 | int err = 0; |
158 | ||
159 | BT_DBG("sk %p backlog %d", sk, backlog); | |
160 | ||
161 | lock_sock(sk); | |
162 | ||
6b3af733 | 163 | if (sk->sk_state != BT_BOUND) { |
af6bcd82 GP |
164 | err = -EBADFD; |
165 | goto done; | |
166 | } | |
167 | ||
6b3af733 MH |
168 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) { |
169 | err = -EINVAL; | |
170 | goto done; | |
171 | } | |
172 | ||
0c1bc5c6 | 173 | switch (chan->mode) { |
af6bcd82 GP |
174 | case L2CAP_MODE_BASIC: |
175 | break; | |
176 | case L2CAP_MODE_ERTM: | |
177 | case L2CAP_MODE_STREAMING: | |
178 | if (!disable_ertm) | |
179 | break; | |
180 | /* fall through */ | |
181 | default: | |
182 | err = -ENOTSUPP; | |
183 | goto done; | |
184 | } | |
185 | ||
af6bcd82 GP |
186 | sk->sk_max_ack_backlog = backlog; |
187 | sk->sk_ack_backlog = 0; | |
89bc500e GP |
188 | |
189 | chan->state = BT_LISTEN; | |
af6bcd82 GP |
190 | sk->sk_state = BT_LISTEN; |
191 | ||
192 | done: | |
193 | release_sock(sk); | |
194 | return err; | |
195 | } | |
196 | ||
2d792818 GP |
197 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, |
198 | int flags) | |
c47b7c72 GP |
199 | { |
200 | DECLARE_WAITQUEUE(wait, current); | |
201 | struct sock *sk = sock->sk, *nsk; | |
202 | long timeo; | |
203 | int err = 0; | |
204 | ||
205 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
206 | ||
c47b7c72 GP |
207 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
208 | ||
209 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
210 | ||
211 | /* Wait for an incoming connection. (wake-one). */ | |
212 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
f9a3c20a | 213 | while (1) { |
c47b7c72 | 214 | set_current_state(TASK_INTERRUPTIBLE); |
f9a3c20a PH |
215 | |
216 | if (sk->sk_state != BT_LISTEN) { | |
217 | err = -EBADFD; | |
c47b7c72 GP |
218 | break; |
219 | } | |
220 | ||
f9a3c20a PH |
221 | nsk = bt_accept_dequeue(sk, newsock); |
222 | if (nsk) | |
223 | break; | |
c47b7c72 | 224 | |
f9a3c20a PH |
225 | if (!timeo) { |
226 | err = -EAGAIN; | |
c47b7c72 GP |
227 | break; |
228 | } | |
229 | ||
230 | if (signal_pending(current)) { | |
231 | err = sock_intr_errno(timeo); | |
232 | break; | |
233 | } | |
f9a3c20a PH |
234 | |
235 | release_sock(sk); | |
236 | timeo = schedule_timeout(timeo); | |
237 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
c47b7c72 | 238 | } |
f9a3c20a | 239 | __set_current_state(TASK_RUNNING); |
c47b7c72 GP |
240 | remove_wait_queue(sk_sleep(sk), &wait); |
241 | ||
242 | if (err) | |
243 | goto done; | |
244 | ||
245 | newsock->state = SS_CONNECTED; | |
246 | ||
247 | BT_DBG("new socket %p", nsk); | |
248 | ||
249 | done: | |
250 | release_sock(sk); | |
251 | return err; | |
252 | } | |
253 | ||
2d792818 GP |
254 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, |
255 | int *len, int peer) | |
d7175d55 GP |
256 | { |
257 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
258 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 259 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
d7175d55 GP |
260 | |
261 | BT_DBG("sock %p, sk %p", sock, sk); | |
262 | ||
792039c7 | 263 | memset(la, 0, sizeof(struct sockaddr_l2)); |
d7175d55 GP |
264 | addr->sa_family = AF_BLUETOOTH; |
265 | *len = sizeof(struct sockaddr_l2); | |
266 | ||
267 | if (peer) { | |
fe4128e0 | 268 | la->l2_psm = chan->psm; |
d7175d55 | 269 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
fe4128e0 | 270 | la->l2_cid = cpu_to_le16(chan->dcid); |
d7175d55 | 271 | } else { |
0c1bc5c6 | 272 | la->l2_psm = chan->sport; |
d7175d55 | 273 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
fe4128e0 | 274 | la->l2_cid = cpu_to_le16(chan->scid); |
d7175d55 GP |
275 | } |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
2d792818 GP |
280 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, |
281 | char __user *optval, int __user *optlen) | |
99f4808d GP |
282 | { |
283 | struct sock *sk = sock->sk; | |
4343478f | 284 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d GP |
285 | struct l2cap_options opts; |
286 | struct l2cap_conninfo cinfo; | |
287 | int len, err = 0; | |
288 | u32 opt; | |
289 | ||
290 | BT_DBG("sk %p", sk); | |
291 | ||
292 | if (get_user(len, optlen)) | |
293 | return -EFAULT; | |
294 | ||
295 | lock_sock(sk); | |
296 | ||
297 | switch (optname) { | |
298 | case L2CAP_OPTIONS: | |
e3fb592b | 299 | memset(&opts, 0, sizeof(opts)); |
0c1bc5c6 GP |
300 | opts.imtu = chan->imtu; |
301 | opts.omtu = chan->omtu; | |
302 | opts.flush_to = chan->flush_to; | |
303 | opts.mode = chan->mode; | |
47d1ec61 GP |
304 | opts.fcs = chan->fcs; |
305 | opts.max_tx = chan->max_tx; | |
6327eb98 | 306 | opts.txwin_size = chan->tx_win; |
99f4808d GP |
307 | |
308 | len = min_t(unsigned int, len, sizeof(opts)); | |
309 | if (copy_to_user(optval, (char *) &opts, len)) | |
310 | err = -EFAULT; | |
311 | ||
312 | break; | |
313 | ||
314 | case L2CAP_LM: | |
4343478f | 315 | switch (chan->sec_level) { |
99f4808d GP |
316 | case BT_SECURITY_LOW: |
317 | opt = L2CAP_LM_AUTH; | |
318 | break; | |
319 | case BT_SECURITY_MEDIUM: | |
320 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
321 | break; | |
322 | case BT_SECURITY_HIGH: | |
323 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
2d792818 | 324 | L2CAP_LM_SECURE; |
99f4808d GP |
325 | break; |
326 | default: | |
327 | opt = 0; | |
328 | break; | |
329 | } | |
330 | ||
43bd0f32 | 331 | if (test_bit(FLAG_ROLE_SWITCH, &chan->flags)) |
99f4808d GP |
332 | opt |= L2CAP_LM_MASTER; |
333 | ||
ecf61bdb | 334 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
99f4808d GP |
335 | opt |= L2CAP_LM_RELIABLE; |
336 | ||
337 | if (put_user(opt, (u32 __user *) optval)) | |
338 | err = -EFAULT; | |
339 | break; | |
340 | ||
341 | case L2CAP_CONNINFO: | |
342 | if (sk->sk_state != BT_CONNECTED && | |
c5daa683 GP |
343 | !(sk->sk_state == BT_CONNECT2 && |
344 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { | |
99f4808d GP |
345 | err = -ENOTCONN; |
346 | break; | |
347 | } | |
348 | ||
8d03e971 | 349 | memset(&cinfo, 0, sizeof(cinfo)); |
8c1d787b GP |
350 | cinfo.hci_handle = chan->conn->hcon->handle; |
351 | memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); | |
99f4808d GP |
352 | |
353 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
354 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
355 | err = -EFAULT; | |
356 | ||
357 | break; | |
358 | ||
359 | default: | |
360 | err = -ENOPROTOOPT; | |
361 | break; | |
362 | } | |
363 | ||
364 | release_sock(sk); | |
365 | return err; | |
366 | } | |
367 | ||
2d792818 GP |
368 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, |
369 | char __user *optval, int __user *optlen) | |
99f4808d GP |
370 | { |
371 | struct sock *sk = sock->sk; | |
4343478f | 372 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d | 373 | struct bt_security sec; |
14b12d0b | 374 | struct bt_power pwr; |
99f4808d GP |
375 | int len, err = 0; |
376 | ||
377 | BT_DBG("sk %p", sk); | |
378 | ||
379 | if (level == SOL_L2CAP) | |
380 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
381 | ||
382 | if (level != SOL_BLUETOOTH) | |
383 | return -ENOPROTOOPT; | |
384 | ||
385 | if (get_user(len, optlen)) | |
386 | return -EFAULT; | |
387 | ||
388 | lock_sock(sk); | |
389 | ||
390 | switch (optname) { | |
391 | case BT_SECURITY: | |
715ec005 | 392 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
2d792818 | 393 | chan->chan_type != L2CAP_CHAN_RAW) { |
99f4808d GP |
394 | err = -EINVAL; |
395 | break; | |
396 | } | |
397 | ||
8f360119 | 398 | memset(&sec, 0, sizeof(sec)); |
85e34368 | 399 | if (chan->conn) { |
c6585a4d | 400 | sec.level = chan->conn->hcon->sec_level; |
99f4808d | 401 | |
85e34368 AE |
402 | if (sk->sk_state == BT_CONNECTED) |
403 | sec.key_size = chan->conn->hcon->enc_key_size; | |
404 | } else { | |
405 | sec.level = chan->sec_level; | |
406 | } | |
8f360119 | 407 | |
99f4808d GP |
408 | len = min_t(unsigned int, len, sizeof(sec)); |
409 | if (copy_to_user(optval, (char *) &sec, len)) | |
410 | err = -EFAULT; | |
411 | ||
412 | break; | |
413 | ||
414 | case BT_DEFER_SETUP: | |
415 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
416 | err = -EINVAL; | |
417 | break; | |
418 | } | |
419 | ||
c5daa683 GP |
420 | if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), |
421 | (u32 __user *) optval)) | |
99f4808d GP |
422 | err = -EFAULT; |
423 | ||
424 | break; | |
425 | ||
426 | case BT_FLUSHABLE: | |
d57b0e8b | 427 | if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags), |
2d792818 | 428 | (u32 __user *) optval)) |
99f4808d GP |
429 | err = -EFAULT; |
430 | ||
431 | break; | |
432 | ||
14b12d0b JG |
433 | case BT_POWER: |
434 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
2d792818 | 435 | && sk->sk_type != SOCK_RAW) { |
14b12d0b JG |
436 | err = -EINVAL; |
437 | break; | |
438 | } | |
439 | ||
15770b1a | 440 | pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
14b12d0b JG |
441 | |
442 | len = min_t(unsigned int, len, sizeof(pwr)); | |
443 | if (copy_to_user(optval, (char *) &pwr, len)) | |
444 | err = -EFAULT; | |
445 | ||
446 | break; | |
447 | ||
2ea66482 | 448 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
449 | if (put_user(chan->chan_policy, (u32 __user *) optval)) |
450 | err = -EFAULT; | |
451 | break; | |
452 | ||
99f4808d GP |
453 | default: |
454 | err = -ENOPROTOOPT; | |
455 | break; | |
456 | } | |
457 | ||
458 | release_sock(sk); | |
459 | return err; | |
460 | } | |
461 | ||
682877c3 AG |
462 | static bool l2cap_valid_mtu(struct l2cap_chan *chan, u16 mtu) |
463 | { | |
464 | switch (chan->scid) { | |
073d1cf3 | 465 | case L2CAP_CID_ATT: |
8c3a4f00 | 466 | if (mtu < L2CAP_LE_MIN_MTU) |
682877c3 AG |
467 | return false; |
468 | break; | |
469 | ||
470 | default: | |
471 | if (mtu < L2CAP_DEFAULT_MIN_MTU) | |
472 | return false; | |
473 | } | |
474 | ||
475 | return true; | |
476 | } | |
477 | ||
2d792818 GP |
478 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, |
479 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
480 | { |
481 | struct sock *sk = sock->sk; | |
b4450035 | 482 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 GP |
483 | struct l2cap_options opts; |
484 | int len, err = 0; | |
485 | u32 opt; | |
486 | ||
487 | BT_DBG("sk %p", sk); | |
488 | ||
489 | lock_sock(sk); | |
490 | ||
491 | switch (optname) { | |
492 | case L2CAP_OPTIONS: | |
493 | if (sk->sk_state == BT_CONNECTED) { | |
494 | err = -EINVAL; | |
495 | break; | |
496 | } | |
497 | ||
0c1bc5c6 GP |
498 | opts.imtu = chan->imtu; |
499 | opts.omtu = chan->omtu; | |
500 | opts.flush_to = chan->flush_to; | |
501 | opts.mode = chan->mode; | |
47d1ec61 GP |
502 | opts.fcs = chan->fcs; |
503 | opts.max_tx = chan->max_tx; | |
6327eb98 | 504 | opts.txwin_size = chan->tx_win; |
33575df7 GP |
505 | |
506 | len = min_t(unsigned int, sizeof(opts), optlen); | |
507 | if (copy_from_user((char *) &opts, optval, len)) { | |
508 | err = -EFAULT; | |
509 | break; | |
510 | } | |
511 | ||
6327eb98 | 512 | if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) { |
33575df7 GP |
513 | err = -EINVAL; |
514 | break; | |
515 | } | |
516 | ||
682877c3 AG |
517 | if (!l2cap_valid_mtu(chan, opts.imtu)) { |
518 | err = -EINVAL; | |
519 | break; | |
520 | } | |
521 | ||
0c1bc5c6 GP |
522 | chan->mode = opts.mode; |
523 | switch (chan->mode) { | |
33575df7 | 524 | case L2CAP_MODE_BASIC: |
c1360a1c | 525 | clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
33575df7 GP |
526 | break; |
527 | case L2CAP_MODE_ERTM: | |
528 | case L2CAP_MODE_STREAMING: | |
529 | if (!disable_ertm) | |
530 | break; | |
531 | /* fall through */ | |
532 | default: | |
533 | err = -EINVAL; | |
534 | break; | |
535 | } | |
536 | ||
0c1bc5c6 GP |
537 | chan->imtu = opts.imtu; |
538 | chan->omtu = opts.omtu; | |
47d1ec61 GP |
539 | chan->fcs = opts.fcs; |
540 | chan->max_tx = opts.max_tx; | |
6327eb98 | 541 | chan->tx_win = opts.txwin_size; |
12d59781 | 542 | chan->flush_to = opts.flush_to; |
33575df7 GP |
543 | break; |
544 | ||
545 | case L2CAP_LM: | |
546 | if (get_user(opt, (u32 __user *) optval)) { | |
547 | err = -EFAULT; | |
548 | break; | |
549 | } | |
550 | ||
551 | if (opt & L2CAP_LM_AUTH) | |
4343478f | 552 | chan->sec_level = BT_SECURITY_LOW; |
33575df7 | 553 | if (opt & L2CAP_LM_ENCRYPT) |
4343478f | 554 | chan->sec_level = BT_SECURITY_MEDIUM; |
33575df7 | 555 | if (opt & L2CAP_LM_SECURE) |
4343478f | 556 | chan->sec_level = BT_SECURITY_HIGH; |
33575df7 | 557 | |
43bd0f32 AE |
558 | if (opt & L2CAP_LM_MASTER) |
559 | set_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
560 | else | |
561 | clear_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
ecf61bdb AE |
562 | |
563 | if (opt & L2CAP_LM_RELIABLE) | |
564 | set_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
565 | else | |
566 | clear_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
33575df7 GP |
567 | break; |
568 | ||
569 | default: | |
570 | err = -ENOPROTOOPT; | |
571 | break; | |
572 | } | |
573 | ||
574 | release_sock(sk); | |
575 | return err; | |
576 | } | |
577 | ||
2d792818 GP |
578 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, |
579 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
580 | { |
581 | struct sock *sk = sock->sk; | |
4343478f | 582 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 | 583 | struct bt_security sec; |
14b12d0b | 584 | struct bt_power pwr; |
f1cb9af5 | 585 | struct l2cap_conn *conn; |
33575df7 GP |
586 | int len, err = 0; |
587 | u32 opt; | |
588 | ||
589 | BT_DBG("sk %p", sk); | |
590 | ||
591 | if (level == SOL_L2CAP) | |
592 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
593 | ||
594 | if (level != SOL_BLUETOOTH) | |
595 | return -ENOPROTOOPT; | |
596 | ||
597 | lock_sock(sk); | |
598 | ||
599 | switch (optname) { | |
600 | case BT_SECURITY: | |
715ec005 | 601 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
2d792818 | 602 | chan->chan_type != L2CAP_CHAN_RAW) { |
33575df7 GP |
603 | err = -EINVAL; |
604 | break; | |
605 | } | |
606 | ||
607 | sec.level = BT_SECURITY_LOW; | |
608 | ||
609 | len = min_t(unsigned int, sizeof(sec), optlen); | |
610 | if (copy_from_user((char *) &sec, optval, len)) { | |
611 | err = -EFAULT; | |
612 | break; | |
613 | } | |
614 | ||
615 | if (sec.level < BT_SECURITY_LOW || | |
2d792818 | 616 | sec.level > BT_SECURITY_HIGH) { |
33575df7 GP |
617 | err = -EINVAL; |
618 | break; | |
619 | } | |
620 | ||
4343478f | 621 | chan->sec_level = sec.level; |
f1cb9af5 | 622 | |
0bee1d60 GP |
623 | if (!chan->conn) |
624 | break; | |
625 | ||
f1cb9af5 | 626 | conn = chan->conn; |
0bee1d60 GP |
627 | |
628 | /*change security for LE channels */ | |
073d1cf3 | 629 | if (chan->scid == L2CAP_CID_ATT) { |
f1cb9af5 VCG |
630 | if (!conn->hcon->out) { |
631 | err = -EINVAL; | |
632 | break; | |
633 | } | |
634 | ||
cc110922 | 635 | if (smp_conn_security(conn->hcon, sec.level)) |
f1cb9af5 | 636 | break; |
f1cb9af5 | 637 | sk->sk_state = BT_CONFIG; |
3542b854 | 638 | chan->state = BT_CONFIG; |
0bee1d60 | 639 | |
a7d7723a GP |
640 | /* or for ACL link */ |
641 | } else if ((sk->sk_state == BT_CONNECT2 && | |
2d792818 | 642 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) || |
a7d7723a GP |
643 | sk->sk_state == BT_CONNECTED) { |
644 | if (!l2cap_chan_check_security(chan)) | |
c5daa683 | 645 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
a7d7723a GP |
646 | else |
647 | sk->sk_state_change(sk); | |
0bee1d60 GP |
648 | } else { |
649 | err = -EINVAL; | |
f1cb9af5 | 650 | } |
33575df7 GP |
651 | break; |
652 | ||
653 | case BT_DEFER_SETUP: | |
654 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
655 | err = -EINVAL; | |
656 | break; | |
657 | } | |
658 | ||
659 | if (get_user(opt, (u32 __user *) optval)) { | |
660 | err = -EFAULT; | |
661 | break; | |
662 | } | |
663 | ||
c5daa683 GP |
664 | if (opt) |
665 | set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); | |
666 | else | |
667 | clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); | |
33575df7 GP |
668 | break; |
669 | ||
670 | case BT_FLUSHABLE: | |
671 | if (get_user(opt, (u32 __user *) optval)) { | |
672 | err = -EFAULT; | |
673 | break; | |
674 | } | |
675 | ||
676 | if (opt > BT_FLUSHABLE_ON) { | |
677 | err = -EINVAL; | |
678 | break; | |
679 | } | |
680 | ||
681 | if (opt == BT_FLUSHABLE_OFF) { | |
c1f23a2b | 682 | conn = chan->conn; |
25985edc | 683 | /* proceed further only when we have l2cap_conn and |
33575df7 GP |
684 | No Flush support in the LM */ |
685 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { | |
686 | err = -EINVAL; | |
687 | break; | |
688 | } | |
689 | } | |
690 | ||
d57b0e8b AE |
691 | if (opt) |
692 | set_bit(FLAG_FLUSHABLE, &chan->flags); | |
693 | else | |
694 | clear_bit(FLAG_FLUSHABLE, &chan->flags); | |
33575df7 GP |
695 | break; |
696 | ||
14b12d0b JG |
697 | case BT_POWER: |
698 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && | |
2d792818 | 699 | chan->chan_type != L2CAP_CHAN_RAW) { |
14b12d0b JG |
700 | err = -EINVAL; |
701 | break; | |
702 | } | |
703 | ||
704 | pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; | |
705 | ||
706 | len = min_t(unsigned int, sizeof(pwr), optlen); | |
707 | if (copy_from_user((char *) &pwr, optval, len)) { | |
708 | err = -EFAULT; | |
709 | break; | |
710 | } | |
15770b1a AE |
711 | |
712 | if (pwr.force_active) | |
713 | set_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
714 | else | |
715 | clear_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
14b12d0b JG |
716 | break; |
717 | ||
2ea66482 | 718 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
719 | if (get_user(opt, (u32 __user *) optval)) { |
720 | err = -EFAULT; | |
721 | break; | |
722 | } | |
723 | ||
724 | if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) { | |
725 | err = -EINVAL; | |
726 | break; | |
727 | } | |
728 | ||
729 | if (chan->mode != L2CAP_MODE_ERTM && | |
2d792818 | 730 | chan->mode != L2CAP_MODE_STREAMING) { |
2ea66482 MM |
731 | err = -EOPNOTSUPP; |
732 | break; | |
733 | } | |
734 | ||
735 | chan->chan_policy = (u8) opt; | |
3f7a56c4 MM |
736 | |
737 | if (sk->sk_state == BT_CONNECTED && | |
738 | chan->move_role == L2CAP_MOVE_ROLE_NONE) | |
739 | l2cap_move_start(chan); | |
740 | ||
14b12d0b JG |
741 | break; |
742 | ||
33575df7 GP |
743 | default: |
744 | err = -ENOPROTOOPT; | |
745 | break; | |
746 | } | |
747 | ||
748 | release_sock(sk); | |
749 | return err; | |
750 | } | |
fd83ccdb | 751 | |
2d792818 GP |
752 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
753 | struct msghdr *msg, size_t len) | |
fd83ccdb GP |
754 | { |
755 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 756 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb GP |
757 | int err; |
758 | ||
759 | BT_DBG("sock %p, sk %p", sock, sk); | |
760 | ||
761 | err = sock_error(sk); | |
762 | if (err) | |
763 | return err; | |
764 | ||
765 | if (msg->msg_flags & MSG_OOB) | |
766 | return -EOPNOTSUPP; | |
767 | ||
a6a5568c | 768 | if (sk->sk_state != BT_CONNECTED) |
9a91a04a | 769 | return -ENOTCONN; |
fd83ccdb | 770 | |
e793dcf0 JH |
771 | lock_sock(sk); |
772 | err = bt_sock_wait_ready(sk, msg->msg_flags); | |
773 | release_sock(sk); | |
774 | if (err) | |
775 | return err; | |
776 | ||
a6a5568c | 777 | l2cap_chan_lock(chan); |
5e59b791 | 778 | err = l2cap_chan_send(chan, msg, len, sk->sk_priority); |
a6a5568c | 779 | l2cap_chan_unlock(chan); |
fd83ccdb | 780 | |
fd83ccdb GP |
781 | return err; |
782 | } | |
33575df7 | 783 | |
2d792818 GP |
784 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
785 | struct msghdr *msg, size_t len, int flags) | |
68983259 GP |
786 | { |
787 | struct sock *sk = sock->sk; | |
e328140f MM |
788 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
789 | int err; | |
68983259 GP |
790 | |
791 | lock_sock(sk); | |
792 | ||
c5daa683 GP |
793 | if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP, |
794 | &bt_sk(sk)->flags)) { | |
8c1d787b | 795 | sk->sk_state = BT_CONFIG; |
3542b854 | 796 | pi->chan->state = BT_CONFIG; |
8c1d787b | 797 | |
e328140f | 798 | __l2cap_connect_rsp_defer(pi->chan); |
970871bc JH |
799 | err = 0; |
800 | goto done; | |
68983259 GP |
801 | } |
802 | ||
803 | release_sock(sk); | |
804 | ||
805 | if (sock->type == SOCK_STREAM) | |
e328140f MM |
806 | err = bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); |
807 | else | |
808 | err = bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
809 | ||
810 | if (pi->chan->mode != L2CAP_MODE_ERTM) | |
811 | return err; | |
812 | ||
813 | /* Attempt to put pending rx data in the socket buffer */ | |
814 | ||
815 | lock_sock(sk); | |
816 | ||
817 | if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state)) | |
818 | goto done; | |
819 | ||
820 | if (pi->rx_busy_skb) { | |
821 | if (!sock_queue_rcv_skb(sk, pi->rx_busy_skb)) | |
822 | pi->rx_busy_skb = NULL; | |
823 | else | |
824 | goto done; | |
825 | } | |
826 | ||
827 | /* Restore data flow when half of the receive buffer is | |
828 | * available. This avoids resending large numbers of | |
829 | * frames. | |
830 | */ | |
831 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1) | |
832 | l2cap_chan_busy(pi->chan, 0); | |
68983259 | 833 | |
e328140f MM |
834 | done: |
835 | release_sock(sk); | |
836 | return err; | |
68983259 GP |
837 | } |
838 | ||
05fc1576 GP |
839 | /* Kill socket (only if zapped and orphan) |
840 | * Must be called on unlocked socket. | |
841 | */ | |
ba3bd0ee | 842 | static void l2cap_sock_kill(struct sock *sk) |
05fc1576 GP |
843 | { |
844 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
845 | return; | |
846 | ||
e05dcc32 | 847 | BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state)); |
05fc1576 GP |
848 | |
849 | /* Kill poor orphan */ | |
6ff5abbf | 850 | |
4af66c69 | 851 | l2cap_chan_put(l2cap_pi(sk)->chan); |
05fc1576 GP |
852 | sock_set_flag(sk, SOCK_DEAD); |
853 | sock_put(sk); | |
854 | } | |
855 | ||
dcba0dba GP |
856 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
857 | { | |
858 | struct sock *sk = sock->sk; | |
7ddb6e0f | 859 | struct l2cap_chan *chan; |
3df91ea2 | 860 | struct l2cap_conn *conn; |
dcba0dba GP |
861 | int err = 0; |
862 | ||
863 | BT_DBG("sock %p, sk %p", sock, sk); | |
864 | ||
865 | if (!sk) | |
866 | return 0; | |
867 | ||
7ddb6e0f | 868 | chan = l2cap_pi(sk)->chan; |
3df91ea2 AE |
869 | conn = chan->conn; |
870 | ||
871 | if (conn) | |
872 | mutex_lock(&conn->chan_lock); | |
7ddb6e0f | 873 | |
6be36555 | 874 | l2cap_chan_lock(chan); |
dcba0dba | 875 | lock_sock(sk); |
6be36555 | 876 | |
dcba0dba | 877 | if (!sk->sk_shutdown) { |
0c1bc5c6 | 878 | if (chan->mode == L2CAP_MODE_ERTM) |
dcba0dba GP |
879 | err = __l2cap_wait_ack(sk); |
880 | ||
881 | sk->sk_shutdown = SHUTDOWN_MASK; | |
3df91ea2 | 882 | |
6be36555 | 883 | release_sock(sk); |
0f852724 | 884 | l2cap_chan_close(chan, 0); |
6be36555 | 885 | lock_sock(sk); |
dcba0dba GP |
886 | |
887 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
888 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
2d792818 | 889 | sk->sk_lingertime); |
dcba0dba GP |
890 | } |
891 | ||
892 | if (!err && sk->sk_err) | |
893 | err = -sk->sk_err; | |
894 | ||
895 | release_sock(sk); | |
6be36555 | 896 | l2cap_chan_unlock(chan); |
3df91ea2 AE |
897 | |
898 | if (conn) | |
899 | mutex_unlock(&conn->chan_lock); | |
900 | ||
dcba0dba GP |
901 | return err; |
902 | } | |
903 | ||
554f05bb GP |
904 | static int l2cap_sock_release(struct socket *sock) |
905 | { | |
906 | struct sock *sk = sock->sk; | |
907 | int err; | |
908 | ||
909 | BT_DBG("sock %p, sk %p", sock, sk); | |
910 | ||
911 | if (!sk) | |
912 | return 0; | |
913 | ||
5b28d95c MY |
914 | bt_sock_unlink(&l2cap_sk_list, sk); |
915 | ||
554f05bb GP |
916 | err = l2cap_sock_shutdown(sock, 2); |
917 | ||
918 | sock_orphan(sk); | |
919 | l2cap_sock_kill(sk); | |
920 | return err; | |
921 | } | |
922 | ||
c0df7f6e AE |
923 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
924 | { | |
925 | struct sock *sk; | |
926 | ||
927 | BT_DBG("parent %p", parent); | |
928 | ||
929 | /* Close not yet accepted channels */ | |
930 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
931 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
932 | ||
933 | l2cap_chan_lock(chan); | |
934 | __clear_chan_timer(chan); | |
935 | l2cap_chan_close(chan, ECONNRESET); | |
936 | l2cap_chan_unlock(chan); | |
937 | ||
938 | l2cap_sock_kill(sk); | |
939 | } | |
940 | } | |
941 | ||
80b98027 | 942 | static struct l2cap_chan *l2cap_sock_new_connection_cb(struct l2cap_chan *chan) |
80808e43 | 943 | { |
80b98027 | 944 | struct sock *sk, *parent = chan->data; |
80808e43 | 945 | |
53826692 GP |
946 | /* Check for backlog size */ |
947 | if (sk_acceptq_is_full(parent)) { | |
948 | BT_DBG("backlog full %d", parent->sk_ack_backlog); | |
949 | return NULL; | |
950 | } | |
951 | ||
80808e43 | 952 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, |
2d792818 | 953 | GFP_ATOMIC); |
80808e43 GP |
954 | if (!sk) |
955 | return NULL; | |
956 | ||
d22015aa OP |
957 | bt_sock_reclassify_lock(sk, BTPROTO_L2CAP); |
958 | ||
80808e43 GP |
959 | l2cap_sock_init(sk, parent); |
960 | ||
644912e1 GP |
961 | bt_accept_enqueue(parent, sk); |
962 | ||
80808e43 GP |
963 | return l2cap_pi(sk)->chan; |
964 | } | |
965 | ||
80b98027 | 966 | static int l2cap_sock_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) |
23070494 | 967 | { |
e328140f | 968 | int err; |
80b98027 | 969 | struct sock *sk = chan->data; |
e328140f MM |
970 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
971 | ||
6be36555 AE |
972 | lock_sock(sk); |
973 | ||
974 | if (pi->rx_busy_skb) { | |
975 | err = -ENOMEM; | |
976 | goto done; | |
977 | } | |
e328140f MM |
978 | |
979 | err = sock_queue_rcv_skb(sk, skb); | |
980 | ||
981 | /* For ERTM, handle one skb that doesn't fit into the recv | |
982 | * buffer. This is important to do because the data frames | |
983 | * have already been acked, so the skb cannot be discarded. | |
984 | * | |
985 | * Notify the l2cap core that the buffer is full, so the | |
986 | * LOCAL_BUSY state is entered and no more frames are | |
987 | * acked and reassembled until there is buffer space | |
988 | * available. | |
989 | */ | |
990 | if (err < 0 && pi->chan->mode == L2CAP_MODE_ERTM) { | |
991 | pi->rx_busy_skb = skb; | |
992 | l2cap_chan_busy(pi->chan, 1); | |
993 | err = 0; | |
994 | } | |
23070494 | 995 | |
6be36555 AE |
996 | done: |
997 | release_sock(sk); | |
998 | ||
e328140f | 999 | return err; |
23070494 GP |
1000 | } |
1001 | ||
80b98027 | 1002 | static void l2cap_sock_close_cb(struct l2cap_chan *chan) |
ba3bd0ee | 1003 | { |
80b98027 | 1004 | struct sock *sk = chan->data; |
ba3bd0ee GP |
1005 | |
1006 | l2cap_sock_kill(sk); | |
1007 | } | |
1008 | ||
c0df7f6e AE |
1009 | static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err) |
1010 | { | |
1011 | struct sock *sk = chan->data; | |
1012 | struct sock *parent; | |
1013 | ||
1014 | lock_sock(sk); | |
1015 | ||
1016 | parent = bt_sk(sk)->parent; | |
1017 | ||
1018 | sock_set_flag(sk, SOCK_ZAPPED); | |
1019 | ||
1020 | switch (chan->state) { | |
1021 | case BT_OPEN: | |
1022 | case BT_BOUND: | |
1023 | case BT_CLOSED: | |
1024 | break; | |
1025 | case BT_LISTEN: | |
1026 | l2cap_sock_cleanup_listen(sk); | |
1027 | sk->sk_state = BT_CLOSED; | |
1028 | chan->state = BT_CLOSED; | |
1029 | ||
1030 | break; | |
1031 | default: | |
1032 | sk->sk_state = BT_CLOSED; | |
1033 | chan->state = BT_CLOSED; | |
1034 | ||
1035 | sk->sk_err = err; | |
1036 | ||
1037 | if (parent) { | |
1038 | bt_accept_unlink(sk); | |
1039 | parent->sk_data_ready(parent, 0); | |
1040 | } else { | |
1041 | sk->sk_state_change(sk); | |
1042 | } | |
1043 | ||
1044 | break; | |
1045 | } | |
1046 | ||
1047 | release_sock(sk); | |
1048 | } | |
1049 | ||
80b98027 | 1050 | static void l2cap_sock_state_change_cb(struct l2cap_chan *chan, int state) |
89bc500e | 1051 | { |
80b98027 | 1052 | struct sock *sk = chan->data; |
89bc500e GP |
1053 | |
1054 | sk->sk_state = state; | |
1055 | } | |
1056 | ||
2f7719ce | 1057 | static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan, |
90338947 | 1058 | unsigned long len, int nb) |
2f7719ce | 1059 | { |
90338947 GP |
1060 | struct sk_buff *skb; |
1061 | int err; | |
1062 | ||
a6a5568c | 1063 | l2cap_chan_unlock(chan); |
90338947 | 1064 | skb = bt_skb_send_alloc(chan->sk, len, nb, &err); |
a6a5568c MM |
1065 | l2cap_chan_lock(chan); |
1066 | ||
90338947 GP |
1067 | if (!skb) |
1068 | return ERR_PTR(err); | |
2f7719ce | 1069 | |
90338947 | 1070 | return skb; |
2f7719ce AE |
1071 | } |
1072 | ||
54a59aa2 AE |
1073 | static void l2cap_sock_ready_cb(struct l2cap_chan *chan) |
1074 | { | |
1075 | struct sock *sk = chan->data; | |
1076 | struct sock *parent; | |
1077 | ||
1078 | lock_sock(sk); | |
1079 | ||
1080 | parent = bt_sk(sk)->parent; | |
1081 | ||
1082 | BT_DBG("sk %p, parent %p", sk, parent); | |
1083 | ||
1084 | sk->sk_state = BT_CONNECTED; | |
1085 | sk->sk_state_change(sk); | |
1086 | ||
1087 | if (parent) | |
1088 | parent->sk_data_ready(parent, 0); | |
1089 | ||
1090 | release_sock(sk); | |
1091 | } | |
1092 | ||
2dc4e510 GP |
1093 | static void l2cap_sock_defer_cb(struct l2cap_chan *chan) |
1094 | { | |
1095 | struct sock *sk = chan->data; | |
1096 | struct sock *parent = bt_sk(sk)->parent; | |
1097 | ||
1098 | if (parent) | |
1099 | parent->sk_data_ready(parent, 0); | |
1100 | } | |
1101 | ||
80808e43 GP |
1102 | static struct l2cap_ops l2cap_chan_ops = { |
1103 | .name = "L2CAP Socket Interface", | |
1104 | .new_connection = l2cap_sock_new_connection_cb, | |
23070494 | 1105 | .recv = l2cap_sock_recv_cb, |
ba3bd0ee | 1106 | .close = l2cap_sock_close_cb, |
c0df7f6e | 1107 | .teardown = l2cap_sock_teardown_cb, |
89bc500e | 1108 | .state_change = l2cap_sock_state_change_cb, |
54a59aa2 | 1109 | .ready = l2cap_sock_ready_cb, |
2dc4e510 | 1110 | .defer = l2cap_sock_defer_cb, |
2f7719ce | 1111 | .alloc_skb = l2cap_sock_alloc_skb_cb, |
80808e43 GP |
1112 | }; |
1113 | ||
bb58f747 GP |
1114 | static void l2cap_sock_destruct(struct sock *sk) |
1115 | { | |
1116 | BT_DBG("sk %p", sk); | |
1117 | ||
23d3a869 SL |
1118 | if (l2cap_pi(sk)->chan) |
1119 | l2cap_chan_put(l2cap_pi(sk)->chan); | |
e328140f MM |
1120 | if (l2cap_pi(sk)->rx_busy_skb) { |
1121 | kfree_skb(l2cap_pi(sk)->rx_busy_skb); | |
1122 | l2cap_pi(sk)->rx_busy_skb = NULL; | |
1123 | } | |
1124 | ||
bb58f747 GP |
1125 | skb_queue_purge(&sk->sk_receive_queue); |
1126 | skb_queue_purge(&sk->sk_write_queue); | |
1127 | } | |
1128 | ||
80808e43 | 1129 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747 GP |
1130 | { |
1131 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
b4450035 | 1132 | struct l2cap_chan *chan = pi->chan; |
bb58f747 GP |
1133 | |
1134 | BT_DBG("sk %p", sk); | |
1135 | ||
1136 | if (parent) { | |
b4450035 GP |
1137 | struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
1138 | ||
bb58f747 | 1139 | sk->sk_type = parent->sk_type; |
c5daa683 | 1140 | bt_sk(sk)->flags = bt_sk(parent)->flags; |
bb58f747 | 1141 | |
715ec005 | 1142 | chan->chan_type = pchan->chan_type; |
0c1bc5c6 GP |
1143 | chan->imtu = pchan->imtu; |
1144 | chan->omtu = pchan->omtu; | |
b4450035 | 1145 | chan->conf_state = pchan->conf_state; |
0c1bc5c6 | 1146 | chan->mode = pchan->mode; |
47d1ec61 GP |
1147 | chan->fcs = pchan->fcs; |
1148 | chan->max_tx = pchan->max_tx; | |
1149 | chan->tx_win = pchan->tx_win; | |
6b3c7104 | 1150 | chan->tx_win_max = pchan->tx_win_max; |
4343478f | 1151 | chan->sec_level = pchan->sec_level; |
d57b0e8b | 1152 | chan->flags = pchan->flags; |
6230c9b4 PM |
1153 | |
1154 | security_sk_clone(parent, sk); | |
bb58f747 | 1155 | } else { |
715ec005 GP |
1156 | |
1157 | switch (sk->sk_type) { | |
1158 | case SOCK_RAW: | |
1159 | chan->chan_type = L2CAP_CHAN_RAW; | |
1160 | break; | |
1161 | case SOCK_DGRAM: | |
1162 | chan->chan_type = L2CAP_CHAN_CONN_LESS; | |
1163 | break; | |
1164 | case SOCK_SEQPACKET: | |
1165 | case SOCK_STREAM: | |
1166 | chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; | |
1167 | break; | |
1168 | } | |
1169 | ||
0c1bc5c6 GP |
1170 | chan->imtu = L2CAP_DEFAULT_MTU; |
1171 | chan->omtu = 0; | |
bb58f747 | 1172 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c6 | 1173 | chan->mode = L2CAP_MODE_ERTM; |
c1360a1c | 1174 | set_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
bb58f747 | 1175 | } else { |
0c1bc5c6 | 1176 | chan->mode = L2CAP_MODE_BASIC; |
bb58f747 | 1177 | } |
bd4b1653 AE |
1178 | |
1179 | l2cap_chan_set_defaults(chan); | |
bb58f747 GP |
1180 | } |
1181 | ||
1182 | /* Default config options */ | |
0c1bc5c6 | 1183 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e43 GP |
1184 | |
1185 | chan->data = sk; | |
1186 | chan->ops = &l2cap_chan_ops; | |
bb58f747 GP |
1187 | } |
1188 | ||
1189 | static struct proto l2cap_proto = { | |
1190 | .name = "L2CAP", | |
1191 | .owner = THIS_MODULE, | |
1192 | .obj_size = sizeof(struct l2cap_pinfo) | |
1193 | }; | |
1194 | ||
2d792818 GP |
1195 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
1196 | int proto, gfp_t prio) | |
bb58f747 GP |
1197 | { |
1198 | struct sock *sk; | |
dc50a06d | 1199 | struct l2cap_chan *chan; |
bb58f747 GP |
1200 | |
1201 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); | |
1202 | if (!sk) | |
1203 | return NULL; | |
1204 | ||
1205 | sock_init_data(sock, sk); | |
1206 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
1207 | ||
1208 | sk->sk_destruct = l2cap_sock_destruct; | |
ba13ccd9 | 1209 | sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; |
bb58f747 GP |
1210 | |
1211 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1212 | ||
1213 | sk->sk_protocol = proto; | |
1214 | sk->sk_state = BT_OPEN; | |
1215 | ||
eef1d9b6 | 1216 | chan = l2cap_chan_create(); |
dc50a06d | 1217 | if (!chan) { |
49dfbb91 | 1218 | sk_free(sk); |
dc50a06d GP |
1219 | return NULL; |
1220 | } | |
1221 | ||
61d6ef3e MM |
1222 | l2cap_chan_hold(chan); |
1223 | ||
eef1d9b6 GP |
1224 | chan->sk = sk; |
1225 | ||
dc50a06d GP |
1226 | l2cap_pi(sk)->chan = chan; |
1227 | ||
bb58f747 GP |
1228 | return sk; |
1229 | } | |
1230 | ||
1231 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
1232 | int kern) | |
1233 | { | |
1234 | struct sock *sk; | |
1235 | ||
1236 | BT_DBG("sock %p", sock); | |
1237 | ||
1238 | sock->state = SS_UNCONNECTED; | |
1239 | ||
1240 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
2d792818 | 1241 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
bb58f747 GP |
1242 | return -ESOCKTNOSUPPORT; |
1243 | ||
1244 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
1245 | return -EPERM; | |
1246 | ||
1247 | sock->ops = &l2cap_sock_ops; | |
1248 | ||
1249 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); | |
1250 | if (!sk) | |
1251 | return -ENOMEM; | |
1252 | ||
1253 | l2cap_sock_init(sk, NULL); | |
5b28d95c | 1254 | bt_sock_link(&l2cap_sk_list, sk); |
bb58f747 GP |
1255 | return 0; |
1256 | } | |
1257 | ||
cf2f90f5 | 1258 | static const struct proto_ops l2cap_sock_ops = { |
65390587 GP |
1259 | .family = PF_BLUETOOTH, |
1260 | .owner = THIS_MODULE, | |
1261 | .release = l2cap_sock_release, | |
1262 | .bind = l2cap_sock_bind, | |
1263 | .connect = l2cap_sock_connect, | |
1264 | .listen = l2cap_sock_listen, | |
1265 | .accept = l2cap_sock_accept, | |
1266 | .getname = l2cap_sock_getname, | |
1267 | .sendmsg = l2cap_sock_sendmsg, | |
1268 | .recvmsg = l2cap_sock_recvmsg, | |
1269 | .poll = bt_sock_poll, | |
1270 | .ioctl = bt_sock_ioctl, | |
1271 | .mmap = sock_no_mmap, | |
1272 | .socketpair = sock_no_socketpair, | |
1273 | .shutdown = l2cap_sock_shutdown, | |
1274 | .setsockopt = l2cap_sock_setsockopt, | |
1275 | .getsockopt = l2cap_sock_getsockopt | |
1276 | }; | |
1277 | ||
bb58f747 GP |
1278 | static const struct net_proto_family l2cap_sock_family_ops = { |
1279 | .family = PF_BLUETOOTH, | |
1280 | .owner = THIS_MODULE, | |
1281 | .create = l2cap_sock_create, | |
1282 | }; | |
1283 | ||
1284 | int __init l2cap_init_sockets(void) | |
1285 | { | |
e2174ca4 | 1286 | int err; |
bb58f747 | 1287 | |
e2174ca4 GP |
1288 | err = proto_register(&l2cap_proto, 0); |
1289 | if (err < 0) | |
1290 | return err; | |
bb58f747 | 1291 | |
e2174ca4 | 1292 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
5b28d95c MY |
1293 | if (err < 0) { |
1294 | BT_ERR("L2CAP socket registration failed"); | |
e2174ca4 | 1295 | goto error; |
5b28d95c MY |
1296 | } |
1297 | ||
b0316615 | 1298 | err = bt_procfs_init(&init_net, "l2cap", &l2cap_sk_list, |
2d792818 | 1299 | NULL); |
5b28d95c MY |
1300 | if (err < 0) { |
1301 | BT_ERR("Failed to create L2CAP proc file"); | |
1302 | bt_sock_unregister(BTPROTO_L2CAP); | |
1303 | goto error; | |
1304 | } | |
bb58f747 | 1305 | |
e2174ca4 | 1306 | BT_INFO("L2CAP socket layer initialized"); |
bb58f747 | 1307 | |
e2174ca4 | 1308 | return 0; |
bb58f747 GP |
1309 | |
1310 | error: | |
e2174ca4 GP |
1311 | proto_unregister(&l2cap_proto); |
1312 | return err; | |
bb58f747 GP |
1313 | } |
1314 | ||
1315 | void l2cap_cleanup_sockets(void) | |
1316 | { | |
5b28d95c | 1317 | bt_procfs_cleanup(&init_net, "l2cap"); |
5e9d7f86 | 1318 | bt_sock_unregister(BTPROTO_L2CAP); |
e2174ca4 | 1319 | proto_unregister(&l2cap_proto); |
bb58f747 | 1320 | } |