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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> |
f1cb9af5 | 35 | #include <net/bluetooth/smp.h> |
bb58f747 | 36 | |
5b28d95c MY |
37 | static struct bt_sock_list l2cap_sk_list = { |
38 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) | |
39 | }; | |
40 | ||
cf2f90f5 | 41 | static const struct proto_ops l2cap_sock_ops; |
80808e43 GP |
42 | static void l2cap_sock_init(struct sock *sk, struct sock *parent); |
43 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio); | |
cf2f90f5 | 44 | |
af6bcd82 GP |
45 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
46 | { | |
47 | struct sock *sk = sock->sk; | |
4343478f | 48 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
49 | struct sockaddr_l2 la; |
50 | int len, err = 0; | |
51 | ||
52 | BT_DBG("sk %p", sk); | |
53 | ||
54 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
55 | return -EINVAL; | |
56 | ||
57 | memset(&la, 0, sizeof(la)); | |
58 | len = min_t(unsigned int, sizeof(la), alen); | |
59 | memcpy(&la, addr, len); | |
60 | ||
b62f328b | 61 | if (la.l2_cid && la.l2_psm) |
af6bcd82 GP |
62 | return -EINVAL; |
63 | ||
64 | lock_sock(sk); | |
65 | ||
66 | if (sk->sk_state != BT_OPEN) { | |
67 | err = -EBADFD; | |
68 | goto done; | |
69 | } | |
70 | ||
71 | if (la.l2_psm) { | |
72 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
73 | ||
74 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
75 | if ((psm & 0x0101) != 0x0001) { | |
76 | err = -EINVAL; | |
77 | goto done; | |
78 | } | |
79 | ||
80 | /* Restrict usage of well-known PSMs */ | |
81 | if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { | |
82 | err = -EACCES; | |
83 | goto done; | |
84 | } | |
85 | } | |
86 | ||
9e4425ff | 87 | if (la.l2_cid) |
6e4aff10 | 88 | err = l2cap_add_scid(chan, __le16_to_cpu(la.l2_cid)); |
9e4425ff GP |
89 | else |
90 | err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm); | |
af6bcd82 | 91 | |
9e4425ff GP |
92 | if (err < 0) |
93 | goto done; | |
af6bcd82 | 94 | |
2983fd68 AE |
95 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_SDP || |
96 | __le16_to_cpu(la.l2_psm) == L2CAP_PSM_RFCOMM) | |
9e4425ff | 97 | chan->sec_level = BT_SECURITY_SDP; |
b62f328b | 98 | |
9e4425ff | 99 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
89bc500e GP |
100 | |
101 | chan->state = BT_BOUND; | |
9e4425ff | 102 | sk->sk_state = BT_BOUND; |
af6bcd82 GP |
103 | |
104 | done: | |
105 | release_sock(sk); | |
106 | return err; | |
107 | } | |
108 | ||
4e34c50b GP |
109 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) |
110 | { | |
111 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 112 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
4e34c50b GP |
113 | struct sockaddr_l2 la; |
114 | int len, err = 0; | |
115 | ||
116 | BT_DBG("sk %p", sk); | |
117 | ||
118 | if (!addr || alen < sizeof(addr->sa_family) || | |
119 | addr->sa_family != AF_BLUETOOTH) | |
120 | return -EINVAL; | |
121 | ||
122 | memset(&la, 0, sizeof(la)); | |
123 | len = min_t(unsigned int, sizeof(la), alen); | |
124 | memcpy(&la, addr, len); | |
125 | ||
acd7d370 | 126 | if (la.l2_cid && la.l2_psm) |
4e34c50b GP |
127 | return -EINVAL; |
128 | ||
6e4aff10 | 129 | err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid), |
8e9f9892 | 130 | &la.l2_bdaddr, la.l2_bdaddr_type); |
4e34c50b | 131 | if (err) |
b3fb611e | 132 | return err; |
4e34c50b | 133 | |
6be36555 AE |
134 | lock_sock(sk); |
135 | ||
4e34c50b GP |
136 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
137 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
b3fb611e AE |
138 | |
139 | release_sock(sk); | |
140 | ||
4e34c50b GP |
141 | return err; |
142 | } | |
143 | ||
af6bcd82 GP |
144 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
145 | { | |
146 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 147 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
148 | int err = 0; |
149 | ||
150 | BT_DBG("sk %p backlog %d", sk, backlog); | |
151 | ||
152 | lock_sock(sk); | |
153 | ||
6b3af733 | 154 | if (sk->sk_state != BT_BOUND) { |
af6bcd82 GP |
155 | err = -EBADFD; |
156 | goto done; | |
157 | } | |
158 | ||
6b3af733 MH |
159 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) { |
160 | err = -EINVAL; | |
161 | goto done; | |
162 | } | |
163 | ||
0c1bc5c6 | 164 | switch (chan->mode) { |
af6bcd82 GP |
165 | case L2CAP_MODE_BASIC: |
166 | break; | |
167 | case L2CAP_MODE_ERTM: | |
168 | case L2CAP_MODE_STREAMING: | |
169 | if (!disable_ertm) | |
170 | break; | |
171 | /* fall through */ | |
172 | default: | |
173 | err = -ENOTSUPP; | |
174 | goto done; | |
175 | } | |
176 | ||
af6bcd82 GP |
177 | sk->sk_max_ack_backlog = backlog; |
178 | sk->sk_ack_backlog = 0; | |
89bc500e GP |
179 | |
180 | chan->state = BT_LISTEN; | |
af6bcd82 GP |
181 | sk->sk_state = BT_LISTEN; |
182 | ||
183 | done: | |
184 | release_sock(sk); | |
185 | return err; | |
186 | } | |
187 | ||
c47b7c72 GP |
188 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) |
189 | { | |
190 | DECLARE_WAITQUEUE(wait, current); | |
191 | struct sock *sk = sock->sk, *nsk; | |
192 | long timeo; | |
193 | int err = 0; | |
194 | ||
195 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
196 | ||
c47b7c72 GP |
197 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
198 | ||
199 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
200 | ||
201 | /* Wait for an incoming connection. (wake-one). */ | |
202 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
f9a3c20a | 203 | while (1) { |
c47b7c72 | 204 | set_current_state(TASK_INTERRUPTIBLE); |
f9a3c20a PH |
205 | |
206 | if (sk->sk_state != BT_LISTEN) { | |
207 | err = -EBADFD; | |
c47b7c72 GP |
208 | break; |
209 | } | |
210 | ||
f9a3c20a PH |
211 | nsk = bt_accept_dequeue(sk, newsock); |
212 | if (nsk) | |
213 | break; | |
c47b7c72 | 214 | |
f9a3c20a PH |
215 | if (!timeo) { |
216 | err = -EAGAIN; | |
c47b7c72 GP |
217 | break; |
218 | } | |
219 | ||
220 | if (signal_pending(current)) { | |
221 | err = sock_intr_errno(timeo); | |
222 | break; | |
223 | } | |
f9a3c20a PH |
224 | |
225 | release_sock(sk); | |
226 | timeo = schedule_timeout(timeo); | |
227 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
c47b7c72 | 228 | } |
f9a3c20a | 229 | __set_current_state(TASK_RUNNING); |
c47b7c72 GP |
230 | remove_wait_queue(sk_sleep(sk), &wait); |
231 | ||
232 | if (err) | |
233 | goto done; | |
234 | ||
235 | newsock->state = SS_CONNECTED; | |
236 | ||
237 | BT_DBG("new socket %p", nsk); | |
238 | ||
239 | done: | |
240 | release_sock(sk); | |
241 | return err; | |
242 | } | |
243 | ||
d7175d55 GP |
244 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) |
245 | { | |
246 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
247 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 248 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
d7175d55 GP |
249 | |
250 | BT_DBG("sock %p, sk %p", sock, sk); | |
251 | ||
252 | addr->sa_family = AF_BLUETOOTH; | |
253 | *len = sizeof(struct sockaddr_l2); | |
254 | ||
255 | if (peer) { | |
fe4128e0 | 256 | la->l2_psm = chan->psm; |
d7175d55 | 257 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
fe4128e0 | 258 | la->l2_cid = cpu_to_le16(chan->dcid); |
d7175d55 | 259 | } else { |
0c1bc5c6 | 260 | la->l2_psm = chan->sport; |
d7175d55 | 261 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
fe4128e0 | 262 | la->l2_cid = cpu_to_le16(chan->scid); |
d7175d55 GP |
263 | } |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
99f4808d GP |
268 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
269 | { | |
270 | struct sock *sk = sock->sk; | |
4343478f | 271 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d GP |
272 | struct l2cap_options opts; |
273 | struct l2cap_conninfo cinfo; | |
274 | int len, err = 0; | |
275 | u32 opt; | |
276 | ||
277 | BT_DBG("sk %p", sk); | |
278 | ||
279 | if (get_user(len, optlen)) | |
280 | return -EFAULT; | |
281 | ||
282 | lock_sock(sk); | |
283 | ||
284 | switch (optname) { | |
285 | case L2CAP_OPTIONS: | |
e3fb592b | 286 | memset(&opts, 0, sizeof(opts)); |
0c1bc5c6 GP |
287 | opts.imtu = chan->imtu; |
288 | opts.omtu = chan->omtu; | |
289 | opts.flush_to = chan->flush_to; | |
290 | opts.mode = chan->mode; | |
47d1ec61 GP |
291 | opts.fcs = chan->fcs; |
292 | opts.max_tx = chan->max_tx; | |
6327eb98 | 293 | opts.txwin_size = chan->tx_win; |
99f4808d GP |
294 | |
295 | len = min_t(unsigned int, len, sizeof(opts)); | |
296 | if (copy_to_user(optval, (char *) &opts, len)) | |
297 | err = -EFAULT; | |
298 | ||
299 | break; | |
300 | ||
301 | case L2CAP_LM: | |
4343478f | 302 | switch (chan->sec_level) { |
99f4808d GP |
303 | case BT_SECURITY_LOW: |
304 | opt = L2CAP_LM_AUTH; | |
305 | break; | |
306 | case BT_SECURITY_MEDIUM: | |
307 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
308 | break; | |
309 | case BT_SECURITY_HIGH: | |
310 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
311 | L2CAP_LM_SECURE; | |
312 | break; | |
313 | default: | |
314 | opt = 0; | |
315 | break; | |
316 | } | |
317 | ||
43bd0f32 | 318 | if (test_bit(FLAG_ROLE_SWITCH, &chan->flags)) |
99f4808d GP |
319 | opt |= L2CAP_LM_MASTER; |
320 | ||
ecf61bdb | 321 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
99f4808d GP |
322 | opt |= L2CAP_LM_RELIABLE; |
323 | ||
324 | if (put_user(opt, (u32 __user *) optval)) | |
325 | err = -EFAULT; | |
326 | break; | |
327 | ||
328 | case L2CAP_CONNINFO: | |
329 | if (sk->sk_state != BT_CONNECTED && | |
c5daa683 GP |
330 | !(sk->sk_state == BT_CONNECT2 && |
331 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { | |
99f4808d GP |
332 | err = -ENOTCONN; |
333 | break; | |
334 | } | |
335 | ||
8d03e971 | 336 | memset(&cinfo, 0, sizeof(cinfo)); |
8c1d787b GP |
337 | cinfo.hci_handle = chan->conn->hcon->handle; |
338 | memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); | |
99f4808d GP |
339 | |
340 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
341 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
342 | err = -EFAULT; | |
343 | ||
344 | break; | |
345 | ||
346 | default: | |
347 | err = -ENOPROTOOPT; | |
348 | break; | |
349 | } | |
350 | ||
351 | release_sock(sk); | |
352 | return err; | |
353 | } | |
354 | ||
355 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
356 | { | |
357 | struct sock *sk = sock->sk; | |
4343478f | 358 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d | 359 | struct bt_security sec; |
14b12d0b | 360 | struct bt_power pwr; |
99f4808d GP |
361 | int len, err = 0; |
362 | ||
363 | BT_DBG("sk %p", sk); | |
364 | ||
365 | if (level == SOL_L2CAP) | |
366 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
367 | ||
368 | if (level != SOL_BLUETOOTH) | |
369 | return -ENOPROTOOPT; | |
370 | ||
371 | if (get_user(len, optlen)) | |
372 | return -EFAULT; | |
373 | ||
374 | lock_sock(sk); | |
375 | ||
376 | switch (optname) { | |
377 | case BT_SECURITY: | |
715ec005 GP |
378 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
379 | chan->chan_type != L2CAP_CHAN_RAW) { | |
99f4808d GP |
380 | err = -EINVAL; |
381 | break; | |
382 | } | |
383 | ||
8f360119 | 384 | memset(&sec, 0, sizeof(sec)); |
85e34368 | 385 | if (chan->conn) { |
c6585a4d | 386 | sec.level = chan->conn->hcon->sec_level; |
99f4808d | 387 | |
85e34368 AE |
388 | if (sk->sk_state == BT_CONNECTED) |
389 | sec.key_size = chan->conn->hcon->enc_key_size; | |
390 | } else { | |
391 | sec.level = chan->sec_level; | |
392 | } | |
8f360119 | 393 | |
99f4808d GP |
394 | len = min_t(unsigned int, len, sizeof(sec)); |
395 | if (copy_to_user(optval, (char *) &sec, len)) | |
396 | err = -EFAULT; | |
397 | ||
398 | break; | |
399 | ||
400 | case BT_DEFER_SETUP: | |
401 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
402 | err = -EINVAL; | |
403 | break; | |
404 | } | |
405 | ||
c5daa683 GP |
406 | if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), |
407 | (u32 __user *) optval)) | |
99f4808d GP |
408 | err = -EFAULT; |
409 | ||
410 | break; | |
411 | ||
412 | case BT_FLUSHABLE: | |
d57b0e8b AE |
413 | if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags), |
414 | (u32 __user *) optval)) | |
99f4808d GP |
415 | err = -EFAULT; |
416 | ||
417 | break; | |
418 | ||
14b12d0b JG |
419 | case BT_POWER: |
420 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
421 | && sk->sk_type != SOCK_RAW) { | |
422 | err = -EINVAL; | |
423 | break; | |
424 | } | |
425 | ||
15770b1a | 426 | pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
14b12d0b JG |
427 | |
428 | len = min_t(unsigned int, len, sizeof(pwr)); | |
429 | if (copy_to_user(optval, (char *) &pwr, len)) | |
430 | err = -EFAULT; | |
431 | ||
432 | break; | |
433 | ||
2ea66482 MM |
434 | case BT_CHANNEL_POLICY: |
435 | if (!enable_hs) { | |
436 | err = -ENOPROTOOPT; | |
437 | break; | |
438 | } | |
439 | ||
440 | if (put_user(chan->chan_policy, (u32 __user *) optval)) | |
441 | err = -EFAULT; | |
442 | break; | |
443 | ||
99f4808d GP |
444 | default: |
445 | err = -ENOPROTOOPT; | |
446 | break; | |
447 | } | |
448 | ||
449 | release_sock(sk); | |
450 | return err; | |
451 | } | |
452 | ||
682877c3 AG |
453 | static bool l2cap_valid_mtu(struct l2cap_chan *chan, u16 mtu) |
454 | { | |
455 | switch (chan->scid) { | |
456 | case L2CAP_CID_LE_DATA: | |
8c3a4f00 | 457 | if (mtu < L2CAP_LE_MIN_MTU) |
682877c3 AG |
458 | return false; |
459 | break; | |
460 | ||
461 | default: | |
462 | if (mtu < L2CAP_DEFAULT_MIN_MTU) | |
463 | return false; | |
464 | } | |
465 | ||
466 | return true; | |
467 | } | |
468 | ||
33575df7 GP |
469 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
470 | { | |
471 | struct sock *sk = sock->sk; | |
b4450035 | 472 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 GP |
473 | struct l2cap_options opts; |
474 | int len, err = 0; | |
475 | u32 opt; | |
476 | ||
477 | BT_DBG("sk %p", sk); | |
478 | ||
479 | lock_sock(sk); | |
480 | ||
481 | switch (optname) { | |
482 | case L2CAP_OPTIONS: | |
483 | if (sk->sk_state == BT_CONNECTED) { | |
484 | err = -EINVAL; | |
485 | break; | |
486 | } | |
487 | ||
0c1bc5c6 GP |
488 | opts.imtu = chan->imtu; |
489 | opts.omtu = chan->omtu; | |
490 | opts.flush_to = chan->flush_to; | |
491 | opts.mode = chan->mode; | |
47d1ec61 GP |
492 | opts.fcs = chan->fcs; |
493 | opts.max_tx = chan->max_tx; | |
6327eb98 | 494 | opts.txwin_size = chan->tx_win; |
33575df7 GP |
495 | |
496 | len = min_t(unsigned int, sizeof(opts), optlen); | |
497 | if (copy_from_user((char *) &opts, optval, len)) { | |
498 | err = -EFAULT; | |
499 | break; | |
500 | } | |
501 | ||
6327eb98 | 502 | if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) { |
33575df7 GP |
503 | err = -EINVAL; |
504 | break; | |
505 | } | |
506 | ||
682877c3 AG |
507 | if (!l2cap_valid_mtu(chan, opts.imtu)) { |
508 | err = -EINVAL; | |
509 | break; | |
510 | } | |
511 | ||
0c1bc5c6 GP |
512 | chan->mode = opts.mode; |
513 | switch (chan->mode) { | |
33575df7 | 514 | case L2CAP_MODE_BASIC: |
c1360a1c | 515 | clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
33575df7 GP |
516 | break; |
517 | case L2CAP_MODE_ERTM: | |
518 | case L2CAP_MODE_STREAMING: | |
519 | if (!disable_ertm) | |
520 | break; | |
521 | /* fall through */ | |
522 | default: | |
523 | err = -EINVAL; | |
524 | break; | |
525 | } | |
526 | ||
0c1bc5c6 GP |
527 | chan->imtu = opts.imtu; |
528 | chan->omtu = opts.omtu; | |
47d1ec61 GP |
529 | chan->fcs = opts.fcs; |
530 | chan->max_tx = opts.max_tx; | |
6327eb98 | 531 | chan->tx_win = opts.txwin_size; |
33575df7 GP |
532 | break; |
533 | ||
534 | case L2CAP_LM: | |
535 | if (get_user(opt, (u32 __user *) optval)) { | |
536 | err = -EFAULT; | |
537 | break; | |
538 | } | |
539 | ||
540 | if (opt & L2CAP_LM_AUTH) | |
4343478f | 541 | chan->sec_level = BT_SECURITY_LOW; |
33575df7 | 542 | if (opt & L2CAP_LM_ENCRYPT) |
4343478f | 543 | chan->sec_level = BT_SECURITY_MEDIUM; |
33575df7 | 544 | if (opt & L2CAP_LM_SECURE) |
4343478f | 545 | chan->sec_level = BT_SECURITY_HIGH; |
33575df7 | 546 | |
43bd0f32 AE |
547 | if (opt & L2CAP_LM_MASTER) |
548 | set_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
549 | else | |
550 | clear_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
ecf61bdb AE |
551 | |
552 | if (opt & L2CAP_LM_RELIABLE) | |
553 | set_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
554 | else | |
555 | clear_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
33575df7 GP |
556 | break; |
557 | ||
558 | default: | |
559 | err = -ENOPROTOOPT; | |
560 | break; | |
561 | } | |
562 | ||
563 | release_sock(sk); | |
564 | return err; | |
565 | } | |
566 | ||
567 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) | |
568 | { | |
569 | struct sock *sk = sock->sk; | |
4343478f | 570 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 | 571 | struct bt_security sec; |
14b12d0b | 572 | struct bt_power pwr; |
f1cb9af5 | 573 | struct l2cap_conn *conn; |
33575df7 GP |
574 | int len, err = 0; |
575 | u32 opt; | |
576 | ||
577 | BT_DBG("sk %p", sk); | |
578 | ||
579 | if (level == SOL_L2CAP) | |
580 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
581 | ||
582 | if (level != SOL_BLUETOOTH) | |
583 | return -ENOPROTOOPT; | |
584 | ||
585 | lock_sock(sk); | |
586 | ||
587 | switch (optname) { | |
588 | case BT_SECURITY: | |
715ec005 GP |
589 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
590 | chan->chan_type != L2CAP_CHAN_RAW) { | |
33575df7 GP |
591 | err = -EINVAL; |
592 | break; | |
593 | } | |
594 | ||
595 | sec.level = BT_SECURITY_LOW; | |
596 | ||
597 | len = min_t(unsigned int, sizeof(sec), optlen); | |
598 | if (copy_from_user((char *) &sec, optval, len)) { | |
599 | err = -EFAULT; | |
600 | break; | |
601 | } | |
602 | ||
603 | if (sec.level < BT_SECURITY_LOW || | |
604 | sec.level > BT_SECURITY_HIGH) { | |
605 | err = -EINVAL; | |
606 | break; | |
607 | } | |
608 | ||
4343478f | 609 | chan->sec_level = sec.level; |
f1cb9af5 | 610 | |
0bee1d60 GP |
611 | if (!chan->conn) |
612 | break; | |
613 | ||
f1cb9af5 | 614 | conn = chan->conn; |
0bee1d60 GP |
615 | |
616 | /*change security for LE channels */ | |
617 | if (chan->scid == L2CAP_CID_LE_DATA) { | |
f1cb9af5 VCG |
618 | if (!conn->hcon->out) { |
619 | err = -EINVAL; | |
620 | break; | |
621 | } | |
622 | ||
cc110922 | 623 | if (smp_conn_security(conn->hcon, sec.level)) |
f1cb9af5 | 624 | break; |
f1cb9af5 | 625 | sk->sk_state = BT_CONFIG; |
3542b854 | 626 | chan->state = BT_CONFIG; |
0bee1d60 | 627 | |
a7d7723a GP |
628 | /* or for ACL link */ |
629 | } else if ((sk->sk_state == BT_CONNECT2 && | |
c5daa683 | 630 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) || |
a7d7723a GP |
631 | sk->sk_state == BT_CONNECTED) { |
632 | if (!l2cap_chan_check_security(chan)) | |
c5daa683 | 633 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
a7d7723a GP |
634 | else |
635 | sk->sk_state_change(sk); | |
0bee1d60 GP |
636 | } else { |
637 | err = -EINVAL; | |
f1cb9af5 | 638 | } |
33575df7 GP |
639 | break; |
640 | ||
641 | case BT_DEFER_SETUP: | |
642 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
643 | err = -EINVAL; | |
644 | break; | |
645 | } | |
646 | ||
647 | if (get_user(opt, (u32 __user *) optval)) { | |
648 | err = -EFAULT; | |
649 | break; | |
650 | } | |
651 | ||
c5daa683 GP |
652 | if (opt) |
653 | set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); | |
654 | else | |
655 | clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); | |
33575df7 GP |
656 | break; |
657 | ||
658 | case BT_FLUSHABLE: | |
659 | if (get_user(opt, (u32 __user *) optval)) { | |
660 | err = -EFAULT; | |
661 | break; | |
662 | } | |
663 | ||
664 | if (opt > BT_FLUSHABLE_ON) { | |
665 | err = -EINVAL; | |
666 | break; | |
667 | } | |
668 | ||
669 | if (opt == BT_FLUSHABLE_OFF) { | |
8c1d787b | 670 | struct l2cap_conn *conn = chan->conn; |
25985edc | 671 | /* proceed further only when we have l2cap_conn and |
33575df7 GP |
672 | No Flush support in the LM */ |
673 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { | |
674 | err = -EINVAL; | |
675 | break; | |
676 | } | |
677 | } | |
678 | ||
d57b0e8b AE |
679 | if (opt) |
680 | set_bit(FLAG_FLUSHABLE, &chan->flags); | |
681 | else | |
682 | clear_bit(FLAG_FLUSHABLE, &chan->flags); | |
33575df7 GP |
683 | break; |
684 | ||
14b12d0b JG |
685 | case BT_POWER: |
686 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && | |
687 | chan->chan_type != L2CAP_CHAN_RAW) { | |
688 | err = -EINVAL; | |
689 | break; | |
690 | } | |
691 | ||
692 | pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; | |
693 | ||
694 | len = min_t(unsigned int, sizeof(pwr), optlen); | |
695 | if (copy_from_user((char *) &pwr, optval, len)) { | |
696 | err = -EFAULT; | |
697 | break; | |
698 | } | |
15770b1a AE |
699 | |
700 | if (pwr.force_active) | |
701 | set_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
702 | else | |
703 | clear_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
14b12d0b JG |
704 | break; |
705 | ||
2ea66482 MM |
706 | case BT_CHANNEL_POLICY: |
707 | if (!enable_hs) { | |
708 | err = -ENOPROTOOPT; | |
709 | break; | |
710 | } | |
711 | ||
712 | if (get_user(opt, (u32 __user *) optval)) { | |
713 | err = -EFAULT; | |
714 | break; | |
715 | } | |
716 | ||
717 | if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) { | |
718 | err = -EINVAL; | |
719 | break; | |
720 | } | |
721 | ||
722 | if (chan->mode != L2CAP_MODE_ERTM && | |
723 | chan->mode != L2CAP_MODE_STREAMING) { | |
724 | err = -EOPNOTSUPP; | |
725 | break; | |
726 | } | |
727 | ||
728 | chan->chan_policy = (u8) opt; | |
14b12d0b JG |
729 | break; |
730 | ||
33575df7 GP |
731 | default: |
732 | err = -ENOPROTOOPT; | |
733 | break; | |
734 | } | |
735 | ||
736 | release_sock(sk); | |
737 | return err; | |
738 | } | |
fd83ccdb GP |
739 | |
740 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) | |
741 | { | |
742 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 743 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb GP |
744 | int err; |
745 | ||
746 | BT_DBG("sock %p, sk %p", sock, sk); | |
747 | ||
748 | err = sock_error(sk); | |
749 | if (err) | |
750 | return err; | |
751 | ||
752 | if (msg->msg_flags & MSG_OOB) | |
753 | return -EOPNOTSUPP; | |
754 | ||
a6a5568c | 755 | if (sk->sk_state != BT_CONNECTED) |
9a91a04a | 756 | return -ENOTCONN; |
fd83ccdb | 757 | |
a6a5568c | 758 | l2cap_chan_lock(chan); |
5e59b791 | 759 | err = l2cap_chan_send(chan, msg, len, sk->sk_priority); |
a6a5568c | 760 | l2cap_chan_unlock(chan); |
fd83ccdb | 761 | |
fd83ccdb GP |
762 | return err; |
763 | } | |
33575df7 | 764 | |
68983259 GP |
765 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
766 | { | |
767 | struct sock *sk = sock->sk; | |
e328140f MM |
768 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
769 | int err; | |
68983259 GP |
770 | |
771 | lock_sock(sk); | |
772 | ||
c5daa683 GP |
773 | if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP, |
774 | &bt_sk(sk)->flags)) { | |
8c1d787b | 775 | sk->sk_state = BT_CONFIG; |
3542b854 | 776 | pi->chan->state = BT_CONFIG; |
8c1d787b | 777 | |
e328140f | 778 | __l2cap_connect_rsp_defer(pi->chan); |
68983259 GP |
779 | release_sock(sk); |
780 | return 0; | |
781 | } | |
782 | ||
783 | release_sock(sk); | |
784 | ||
785 | if (sock->type == SOCK_STREAM) | |
e328140f MM |
786 | err = bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); |
787 | else | |
788 | err = bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
789 | ||
790 | if (pi->chan->mode != L2CAP_MODE_ERTM) | |
791 | return err; | |
792 | ||
793 | /* Attempt to put pending rx data in the socket buffer */ | |
794 | ||
795 | lock_sock(sk); | |
796 | ||
797 | if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state)) | |
798 | goto done; | |
799 | ||
800 | if (pi->rx_busy_skb) { | |
801 | if (!sock_queue_rcv_skb(sk, pi->rx_busy_skb)) | |
802 | pi->rx_busy_skb = NULL; | |
803 | else | |
804 | goto done; | |
805 | } | |
806 | ||
807 | /* Restore data flow when half of the receive buffer is | |
808 | * available. This avoids resending large numbers of | |
809 | * frames. | |
810 | */ | |
811 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1) | |
812 | l2cap_chan_busy(pi->chan, 0); | |
68983259 | 813 | |
e328140f MM |
814 | done: |
815 | release_sock(sk); | |
816 | return err; | |
68983259 GP |
817 | } |
818 | ||
05fc1576 GP |
819 | /* Kill socket (only if zapped and orphan) |
820 | * Must be called on unlocked socket. | |
821 | */ | |
ba3bd0ee | 822 | static void l2cap_sock_kill(struct sock *sk) |
05fc1576 GP |
823 | { |
824 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
825 | return; | |
826 | ||
e05dcc32 | 827 | BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state)); |
05fc1576 GP |
828 | |
829 | /* Kill poor orphan */ | |
6ff5abbf | 830 | |
4af66c69 | 831 | l2cap_chan_put(l2cap_pi(sk)->chan); |
05fc1576 GP |
832 | sock_set_flag(sk, SOCK_DEAD); |
833 | sock_put(sk); | |
834 | } | |
835 | ||
dcba0dba GP |
836 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
837 | { | |
838 | struct sock *sk = sock->sk; | |
7ddb6e0f | 839 | struct l2cap_chan *chan; |
3df91ea2 | 840 | struct l2cap_conn *conn; |
dcba0dba GP |
841 | int err = 0; |
842 | ||
843 | BT_DBG("sock %p, sk %p", sock, sk); | |
844 | ||
845 | if (!sk) | |
846 | return 0; | |
847 | ||
7ddb6e0f | 848 | chan = l2cap_pi(sk)->chan; |
3df91ea2 AE |
849 | conn = chan->conn; |
850 | ||
851 | if (conn) | |
852 | mutex_lock(&conn->chan_lock); | |
7ddb6e0f | 853 | |
6be36555 | 854 | l2cap_chan_lock(chan); |
dcba0dba | 855 | lock_sock(sk); |
6be36555 | 856 | |
dcba0dba | 857 | if (!sk->sk_shutdown) { |
0c1bc5c6 | 858 | if (chan->mode == L2CAP_MODE_ERTM) |
dcba0dba GP |
859 | err = __l2cap_wait_ack(sk); |
860 | ||
861 | sk->sk_shutdown = SHUTDOWN_MASK; | |
3df91ea2 | 862 | |
6be36555 | 863 | release_sock(sk); |
0f852724 | 864 | l2cap_chan_close(chan, 0); |
6be36555 | 865 | lock_sock(sk); |
dcba0dba GP |
866 | |
867 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
868 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
869 | sk->sk_lingertime); | |
870 | } | |
871 | ||
872 | if (!err && sk->sk_err) | |
873 | err = -sk->sk_err; | |
874 | ||
875 | release_sock(sk); | |
6be36555 | 876 | l2cap_chan_unlock(chan); |
3df91ea2 AE |
877 | |
878 | if (conn) | |
879 | mutex_unlock(&conn->chan_lock); | |
880 | ||
dcba0dba GP |
881 | return err; |
882 | } | |
883 | ||
554f05bb GP |
884 | static int l2cap_sock_release(struct socket *sock) |
885 | { | |
886 | struct sock *sk = sock->sk; | |
887 | int err; | |
888 | ||
889 | BT_DBG("sock %p, sk %p", sock, sk); | |
890 | ||
891 | if (!sk) | |
892 | return 0; | |
893 | ||
5b28d95c MY |
894 | bt_sock_unlink(&l2cap_sk_list, sk); |
895 | ||
554f05bb GP |
896 | err = l2cap_sock_shutdown(sock, 2); |
897 | ||
898 | sock_orphan(sk); | |
899 | l2cap_sock_kill(sk); | |
900 | return err; | |
901 | } | |
902 | ||
c0df7f6e AE |
903 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
904 | { | |
905 | struct sock *sk; | |
906 | ||
907 | BT_DBG("parent %p", parent); | |
908 | ||
909 | /* Close not yet accepted channels */ | |
910 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
911 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
912 | ||
913 | l2cap_chan_lock(chan); | |
914 | __clear_chan_timer(chan); | |
915 | l2cap_chan_close(chan, ECONNRESET); | |
916 | l2cap_chan_unlock(chan); | |
917 | ||
918 | l2cap_sock_kill(sk); | |
919 | } | |
920 | } | |
921 | ||
80b98027 | 922 | static struct l2cap_chan *l2cap_sock_new_connection_cb(struct l2cap_chan *chan) |
80808e43 | 923 | { |
80b98027 | 924 | struct sock *sk, *parent = chan->data; |
80808e43 | 925 | |
53826692 GP |
926 | /* Check for backlog size */ |
927 | if (sk_acceptq_is_full(parent)) { | |
928 | BT_DBG("backlog full %d", parent->sk_ack_backlog); | |
929 | return NULL; | |
930 | } | |
931 | ||
80808e43 GP |
932 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, |
933 | GFP_ATOMIC); | |
934 | if (!sk) | |
935 | return NULL; | |
936 | ||
d22015aa OP |
937 | bt_sock_reclassify_lock(sk, BTPROTO_L2CAP); |
938 | ||
80808e43 GP |
939 | l2cap_sock_init(sk, parent); |
940 | ||
941 | return l2cap_pi(sk)->chan; | |
942 | } | |
943 | ||
80b98027 | 944 | static int l2cap_sock_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) |
23070494 | 945 | { |
e328140f | 946 | int err; |
80b98027 | 947 | struct sock *sk = chan->data; |
e328140f MM |
948 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
949 | ||
6be36555 AE |
950 | lock_sock(sk); |
951 | ||
952 | if (pi->rx_busy_skb) { | |
953 | err = -ENOMEM; | |
954 | goto done; | |
955 | } | |
e328140f MM |
956 | |
957 | err = sock_queue_rcv_skb(sk, skb); | |
958 | ||
959 | /* For ERTM, handle one skb that doesn't fit into the recv | |
960 | * buffer. This is important to do because the data frames | |
961 | * have already been acked, so the skb cannot be discarded. | |
962 | * | |
963 | * Notify the l2cap core that the buffer is full, so the | |
964 | * LOCAL_BUSY state is entered and no more frames are | |
965 | * acked and reassembled until there is buffer space | |
966 | * available. | |
967 | */ | |
968 | if (err < 0 && pi->chan->mode == L2CAP_MODE_ERTM) { | |
969 | pi->rx_busy_skb = skb; | |
970 | l2cap_chan_busy(pi->chan, 1); | |
971 | err = 0; | |
972 | } | |
23070494 | 973 | |
6be36555 AE |
974 | done: |
975 | release_sock(sk); | |
976 | ||
e328140f | 977 | return err; |
23070494 GP |
978 | } |
979 | ||
80b98027 | 980 | static void l2cap_sock_close_cb(struct l2cap_chan *chan) |
ba3bd0ee | 981 | { |
80b98027 | 982 | struct sock *sk = chan->data; |
ba3bd0ee GP |
983 | |
984 | l2cap_sock_kill(sk); | |
985 | } | |
986 | ||
c0df7f6e AE |
987 | static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err) |
988 | { | |
989 | struct sock *sk = chan->data; | |
990 | struct sock *parent; | |
991 | ||
992 | lock_sock(sk); | |
993 | ||
994 | parent = bt_sk(sk)->parent; | |
995 | ||
996 | sock_set_flag(sk, SOCK_ZAPPED); | |
997 | ||
998 | switch (chan->state) { | |
999 | case BT_OPEN: | |
1000 | case BT_BOUND: | |
1001 | case BT_CLOSED: | |
1002 | break; | |
1003 | case BT_LISTEN: | |
1004 | l2cap_sock_cleanup_listen(sk); | |
1005 | sk->sk_state = BT_CLOSED; | |
1006 | chan->state = BT_CLOSED; | |
1007 | ||
1008 | break; | |
1009 | default: | |
1010 | sk->sk_state = BT_CLOSED; | |
1011 | chan->state = BT_CLOSED; | |
1012 | ||
1013 | sk->sk_err = err; | |
1014 | ||
1015 | if (parent) { | |
1016 | bt_accept_unlink(sk); | |
1017 | parent->sk_data_ready(parent, 0); | |
1018 | } else { | |
1019 | sk->sk_state_change(sk); | |
1020 | } | |
1021 | ||
1022 | break; | |
1023 | } | |
1024 | ||
1025 | release_sock(sk); | |
1026 | } | |
1027 | ||
80b98027 | 1028 | static void l2cap_sock_state_change_cb(struct l2cap_chan *chan, int state) |
89bc500e | 1029 | { |
80b98027 | 1030 | struct sock *sk = chan->data; |
89bc500e GP |
1031 | |
1032 | sk->sk_state = state; | |
1033 | } | |
1034 | ||
2f7719ce | 1035 | static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan, |
90338947 | 1036 | unsigned long len, int nb) |
2f7719ce | 1037 | { |
90338947 GP |
1038 | struct sk_buff *skb; |
1039 | int err; | |
1040 | ||
a6a5568c | 1041 | l2cap_chan_unlock(chan); |
90338947 | 1042 | skb = bt_skb_send_alloc(chan->sk, len, nb, &err); |
a6a5568c MM |
1043 | l2cap_chan_lock(chan); |
1044 | ||
90338947 GP |
1045 | if (!skb) |
1046 | return ERR_PTR(err); | |
2f7719ce | 1047 | |
90338947 | 1048 | return skb; |
2f7719ce AE |
1049 | } |
1050 | ||
54a59aa2 AE |
1051 | static void l2cap_sock_ready_cb(struct l2cap_chan *chan) |
1052 | { | |
1053 | struct sock *sk = chan->data; | |
1054 | struct sock *parent; | |
1055 | ||
1056 | lock_sock(sk); | |
1057 | ||
1058 | parent = bt_sk(sk)->parent; | |
1059 | ||
1060 | BT_DBG("sk %p, parent %p", sk, parent); | |
1061 | ||
1062 | sk->sk_state = BT_CONNECTED; | |
1063 | sk->sk_state_change(sk); | |
1064 | ||
1065 | if (parent) | |
1066 | parent->sk_data_ready(parent, 0); | |
1067 | ||
1068 | release_sock(sk); | |
1069 | } | |
1070 | ||
80808e43 GP |
1071 | static struct l2cap_ops l2cap_chan_ops = { |
1072 | .name = "L2CAP Socket Interface", | |
1073 | .new_connection = l2cap_sock_new_connection_cb, | |
23070494 | 1074 | .recv = l2cap_sock_recv_cb, |
ba3bd0ee | 1075 | .close = l2cap_sock_close_cb, |
c0df7f6e | 1076 | .teardown = l2cap_sock_teardown_cb, |
89bc500e | 1077 | .state_change = l2cap_sock_state_change_cb, |
54a59aa2 | 1078 | .ready = l2cap_sock_ready_cb, |
2f7719ce | 1079 | .alloc_skb = l2cap_sock_alloc_skb_cb, |
80808e43 GP |
1080 | }; |
1081 | ||
bb58f747 GP |
1082 | static void l2cap_sock_destruct(struct sock *sk) |
1083 | { | |
1084 | BT_DBG("sk %p", sk); | |
1085 | ||
23d3a869 SL |
1086 | if (l2cap_pi(sk)->chan) |
1087 | l2cap_chan_put(l2cap_pi(sk)->chan); | |
e328140f MM |
1088 | if (l2cap_pi(sk)->rx_busy_skb) { |
1089 | kfree_skb(l2cap_pi(sk)->rx_busy_skb); | |
1090 | l2cap_pi(sk)->rx_busy_skb = NULL; | |
1091 | } | |
1092 | ||
bb58f747 GP |
1093 | skb_queue_purge(&sk->sk_receive_queue); |
1094 | skb_queue_purge(&sk->sk_write_queue); | |
1095 | } | |
1096 | ||
80808e43 | 1097 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747 GP |
1098 | { |
1099 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
b4450035 | 1100 | struct l2cap_chan *chan = pi->chan; |
bb58f747 GP |
1101 | |
1102 | BT_DBG("sk %p", sk); | |
1103 | ||
1104 | if (parent) { | |
b4450035 GP |
1105 | struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
1106 | ||
bb58f747 | 1107 | sk->sk_type = parent->sk_type; |
c5daa683 | 1108 | bt_sk(sk)->flags = bt_sk(parent)->flags; |
bb58f747 | 1109 | |
715ec005 | 1110 | chan->chan_type = pchan->chan_type; |
0c1bc5c6 GP |
1111 | chan->imtu = pchan->imtu; |
1112 | chan->omtu = pchan->omtu; | |
b4450035 | 1113 | chan->conf_state = pchan->conf_state; |
0c1bc5c6 | 1114 | chan->mode = pchan->mode; |
47d1ec61 GP |
1115 | chan->fcs = pchan->fcs; |
1116 | chan->max_tx = pchan->max_tx; | |
1117 | chan->tx_win = pchan->tx_win; | |
6b3c7104 | 1118 | chan->tx_win_max = pchan->tx_win_max; |
4343478f | 1119 | chan->sec_level = pchan->sec_level; |
d57b0e8b | 1120 | chan->flags = pchan->flags; |
6230c9b4 PM |
1121 | |
1122 | security_sk_clone(parent, sk); | |
bb58f747 | 1123 | } else { |
715ec005 GP |
1124 | |
1125 | switch (sk->sk_type) { | |
1126 | case SOCK_RAW: | |
1127 | chan->chan_type = L2CAP_CHAN_RAW; | |
1128 | break; | |
1129 | case SOCK_DGRAM: | |
1130 | chan->chan_type = L2CAP_CHAN_CONN_LESS; | |
1131 | break; | |
1132 | case SOCK_SEQPACKET: | |
1133 | case SOCK_STREAM: | |
1134 | chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; | |
1135 | break; | |
1136 | } | |
1137 | ||
0c1bc5c6 GP |
1138 | chan->imtu = L2CAP_DEFAULT_MTU; |
1139 | chan->omtu = 0; | |
bb58f747 | 1140 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c6 | 1141 | chan->mode = L2CAP_MODE_ERTM; |
c1360a1c | 1142 | set_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
bb58f747 | 1143 | } else { |
0c1bc5c6 | 1144 | chan->mode = L2CAP_MODE_BASIC; |
bb58f747 | 1145 | } |
bd4b1653 AE |
1146 | |
1147 | l2cap_chan_set_defaults(chan); | |
bb58f747 GP |
1148 | } |
1149 | ||
1150 | /* Default config options */ | |
0c1bc5c6 | 1151 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e43 GP |
1152 | |
1153 | chan->data = sk; | |
1154 | chan->ops = &l2cap_chan_ops; | |
bb58f747 GP |
1155 | } |
1156 | ||
1157 | static struct proto l2cap_proto = { | |
1158 | .name = "L2CAP", | |
1159 | .owner = THIS_MODULE, | |
1160 | .obj_size = sizeof(struct l2cap_pinfo) | |
1161 | }; | |
1162 | ||
80808e43 | 1163 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
bb58f747 GP |
1164 | { |
1165 | struct sock *sk; | |
dc50a06d | 1166 | struct l2cap_chan *chan; |
bb58f747 GP |
1167 | |
1168 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); | |
1169 | if (!sk) | |
1170 | return NULL; | |
1171 | ||
1172 | sock_init_data(sock, sk); | |
1173 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
1174 | ||
1175 | sk->sk_destruct = l2cap_sock_destruct; | |
ba13ccd9 | 1176 | sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; |
bb58f747 GP |
1177 | |
1178 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1179 | ||
1180 | sk->sk_protocol = proto; | |
1181 | sk->sk_state = BT_OPEN; | |
1182 | ||
eef1d9b6 | 1183 | chan = l2cap_chan_create(); |
dc50a06d | 1184 | if (!chan) { |
49dfbb91 | 1185 | sk_free(sk); |
dc50a06d GP |
1186 | return NULL; |
1187 | } | |
1188 | ||
61d6ef3e MM |
1189 | l2cap_chan_hold(chan); |
1190 | ||
eef1d9b6 GP |
1191 | chan->sk = sk; |
1192 | ||
dc50a06d GP |
1193 | l2cap_pi(sk)->chan = chan; |
1194 | ||
bb58f747 GP |
1195 | return sk; |
1196 | } | |
1197 | ||
1198 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
1199 | int kern) | |
1200 | { | |
1201 | struct sock *sk; | |
1202 | ||
1203 | BT_DBG("sock %p", sock); | |
1204 | ||
1205 | sock->state = SS_UNCONNECTED; | |
1206 | ||
1207 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
1208 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
1209 | return -ESOCKTNOSUPPORT; | |
1210 | ||
1211 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
1212 | return -EPERM; | |
1213 | ||
1214 | sock->ops = &l2cap_sock_ops; | |
1215 | ||
1216 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); | |
1217 | if (!sk) | |
1218 | return -ENOMEM; | |
1219 | ||
1220 | l2cap_sock_init(sk, NULL); | |
5b28d95c | 1221 | bt_sock_link(&l2cap_sk_list, sk); |
bb58f747 GP |
1222 | return 0; |
1223 | } | |
1224 | ||
cf2f90f5 | 1225 | static const struct proto_ops l2cap_sock_ops = { |
65390587 GP |
1226 | .family = PF_BLUETOOTH, |
1227 | .owner = THIS_MODULE, | |
1228 | .release = l2cap_sock_release, | |
1229 | .bind = l2cap_sock_bind, | |
1230 | .connect = l2cap_sock_connect, | |
1231 | .listen = l2cap_sock_listen, | |
1232 | .accept = l2cap_sock_accept, | |
1233 | .getname = l2cap_sock_getname, | |
1234 | .sendmsg = l2cap_sock_sendmsg, | |
1235 | .recvmsg = l2cap_sock_recvmsg, | |
1236 | .poll = bt_sock_poll, | |
1237 | .ioctl = bt_sock_ioctl, | |
1238 | .mmap = sock_no_mmap, | |
1239 | .socketpair = sock_no_socketpair, | |
1240 | .shutdown = l2cap_sock_shutdown, | |
1241 | .setsockopt = l2cap_sock_setsockopt, | |
1242 | .getsockopt = l2cap_sock_getsockopt | |
1243 | }; | |
1244 | ||
bb58f747 GP |
1245 | static const struct net_proto_family l2cap_sock_family_ops = { |
1246 | .family = PF_BLUETOOTH, | |
1247 | .owner = THIS_MODULE, | |
1248 | .create = l2cap_sock_create, | |
1249 | }; | |
1250 | ||
1251 | int __init l2cap_init_sockets(void) | |
1252 | { | |
e2174ca4 | 1253 | int err; |
bb58f747 | 1254 | |
e2174ca4 GP |
1255 | err = proto_register(&l2cap_proto, 0); |
1256 | if (err < 0) | |
1257 | return err; | |
bb58f747 | 1258 | |
e2174ca4 | 1259 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
5b28d95c MY |
1260 | if (err < 0) { |
1261 | BT_ERR("L2CAP socket registration failed"); | |
e2174ca4 | 1262 | goto error; |
5b28d95c MY |
1263 | } |
1264 | ||
1265 | err = bt_procfs_init(THIS_MODULE, &init_net, "l2cap", &l2cap_sk_list, NULL); | |
1266 | if (err < 0) { | |
1267 | BT_ERR("Failed to create L2CAP proc file"); | |
1268 | bt_sock_unregister(BTPROTO_L2CAP); | |
1269 | goto error; | |
1270 | } | |
bb58f747 | 1271 | |
e2174ca4 | 1272 | BT_INFO("L2CAP socket layer initialized"); |
bb58f747 | 1273 | |
e2174ca4 | 1274 | return 0; |
bb58f747 GP |
1275 | |
1276 | error: | |
e2174ca4 GP |
1277 | proto_unregister(&l2cap_proto); |
1278 | return err; | |
bb58f747 GP |
1279 | } |
1280 | ||
1281 | void l2cap_cleanup_sockets(void) | |
1282 | { | |
5b28d95c | 1283 | bt_procfs_cleanup(&init_net, "l2cap"); |
e2174ca4 GP |
1284 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) |
1285 | BT_ERR("L2CAP socket unregistration failed"); | |
bb58f747 | 1286 | |
e2174ca4 | 1287 | proto_unregister(&l2cap_proto); |
bb58f747 | 1288 | } |