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. | |
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 | |
cf2f90f5 | 37 | static const struct proto_ops l2cap_sock_ops; |
80808e43 GP |
38 | static void l2cap_sock_init(struct sock *sk, struct sock *parent); |
39 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio); | |
cf2f90f5 | 40 | |
af6bcd82 GP |
41 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
42 | { | |
43 | struct sock *sk = sock->sk; | |
4343478f | 44 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
45 | struct sockaddr_l2 la; |
46 | int len, err = 0; | |
47 | ||
48 | BT_DBG("sk %p", sk); | |
49 | ||
50 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
51 | return -EINVAL; | |
52 | ||
53 | memset(&la, 0, sizeof(la)); | |
54 | len = min_t(unsigned int, sizeof(la), alen); | |
55 | memcpy(&la, addr, len); | |
56 | ||
b62f328b | 57 | if (la.l2_cid && la.l2_psm) |
af6bcd82 GP |
58 | return -EINVAL; |
59 | ||
60 | lock_sock(sk); | |
61 | ||
62 | if (sk->sk_state != BT_OPEN) { | |
63 | err = -EBADFD; | |
64 | goto done; | |
65 | } | |
66 | ||
67 | if (la.l2_psm) { | |
68 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
69 | ||
70 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
71 | if ((psm & 0x0101) != 0x0001) { | |
72 | err = -EINVAL; | |
73 | goto done; | |
74 | } | |
75 | ||
76 | /* Restrict usage of well-known PSMs */ | |
77 | if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { | |
78 | err = -EACCES; | |
79 | goto done; | |
80 | } | |
81 | } | |
82 | ||
9e4425ff | 83 | if (la.l2_cid) |
6e4aff10 | 84 | err = l2cap_add_scid(chan, __le16_to_cpu(la.l2_cid)); |
9e4425ff GP |
85 | else |
86 | err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm); | |
af6bcd82 | 87 | |
9e4425ff GP |
88 | if (err < 0) |
89 | goto done; | |
af6bcd82 | 90 | |
2983fd68 AE |
91 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_SDP || |
92 | __le16_to_cpu(la.l2_psm) == L2CAP_PSM_RFCOMM) | |
9e4425ff | 93 | chan->sec_level = BT_SECURITY_SDP; |
b62f328b | 94 | |
9e4425ff | 95 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
89bc500e GP |
96 | |
97 | chan->state = BT_BOUND; | |
9e4425ff | 98 | sk->sk_state = BT_BOUND; |
af6bcd82 GP |
99 | |
100 | done: | |
101 | release_sock(sk); | |
102 | return err; | |
103 | } | |
104 | ||
4e34c50b GP |
105 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) |
106 | { | |
107 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 108 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
4e34c50b GP |
109 | struct sockaddr_l2 la; |
110 | int len, err = 0; | |
111 | ||
112 | BT_DBG("sk %p", sk); | |
113 | ||
114 | if (!addr || alen < sizeof(addr->sa_family) || | |
115 | addr->sa_family != AF_BLUETOOTH) | |
116 | return -EINVAL; | |
117 | ||
118 | memset(&la, 0, sizeof(la)); | |
119 | len = min_t(unsigned int, sizeof(la), alen); | |
120 | memcpy(&la, addr, len); | |
121 | ||
acd7d370 | 122 | if (la.l2_cid && la.l2_psm) |
4e34c50b GP |
123 | return -EINVAL; |
124 | ||
6e4aff10 | 125 | err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid), |
8e9f9892 | 126 | &la.l2_bdaddr, la.l2_bdaddr_type); |
4e34c50b | 127 | if (err) |
b3fb611e | 128 | return err; |
4e34c50b | 129 | |
6be36555 AE |
130 | lock_sock(sk); |
131 | ||
4e34c50b GP |
132 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
133 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
b3fb611e AE |
134 | |
135 | release_sock(sk); | |
136 | ||
4e34c50b GP |
137 | return err; |
138 | } | |
139 | ||
af6bcd82 GP |
140 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
141 | { | |
142 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 143 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
144 | int err = 0; |
145 | ||
146 | BT_DBG("sk %p backlog %d", sk, backlog); | |
147 | ||
148 | lock_sock(sk); | |
149 | ||
6b3af733 | 150 | if (sk->sk_state != BT_BOUND) { |
af6bcd82 GP |
151 | err = -EBADFD; |
152 | goto done; | |
153 | } | |
154 | ||
6b3af733 MH |
155 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) { |
156 | err = -EINVAL; | |
157 | goto done; | |
158 | } | |
159 | ||
0c1bc5c6 | 160 | switch (chan->mode) { |
af6bcd82 GP |
161 | case L2CAP_MODE_BASIC: |
162 | break; | |
163 | case L2CAP_MODE_ERTM: | |
164 | case L2CAP_MODE_STREAMING: | |
165 | if (!disable_ertm) | |
166 | break; | |
167 | /* fall through */ | |
168 | default: | |
169 | err = -ENOTSUPP; | |
170 | goto done; | |
171 | } | |
172 | ||
af6bcd82 GP |
173 | sk->sk_max_ack_backlog = backlog; |
174 | sk->sk_ack_backlog = 0; | |
89bc500e GP |
175 | |
176 | chan->state = BT_LISTEN; | |
af6bcd82 GP |
177 | sk->sk_state = BT_LISTEN; |
178 | ||
179 | done: | |
180 | release_sock(sk); | |
181 | return err; | |
182 | } | |
183 | ||
c47b7c72 GP |
184 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) |
185 | { | |
186 | DECLARE_WAITQUEUE(wait, current); | |
187 | struct sock *sk = sock->sk, *nsk; | |
188 | long timeo; | |
189 | int err = 0; | |
190 | ||
191 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
192 | ||
c47b7c72 GP |
193 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
194 | ||
195 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
196 | ||
197 | /* Wait for an incoming connection. (wake-one). */ | |
198 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
f9a3c20a | 199 | while (1) { |
c47b7c72 | 200 | set_current_state(TASK_INTERRUPTIBLE); |
f9a3c20a PH |
201 | |
202 | if (sk->sk_state != BT_LISTEN) { | |
203 | err = -EBADFD; | |
c47b7c72 GP |
204 | break; |
205 | } | |
206 | ||
f9a3c20a PH |
207 | nsk = bt_accept_dequeue(sk, newsock); |
208 | if (nsk) | |
209 | break; | |
c47b7c72 | 210 | |
f9a3c20a PH |
211 | if (!timeo) { |
212 | err = -EAGAIN; | |
c47b7c72 GP |
213 | break; |
214 | } | |
215 | ||
216 | if (signal_pending(current)) { | |
217 | err = sock_intr_errno(timeo); | |
218 | break; | |
219 | } | |
f9a3c20a PH |
220 | |
221 | release_sock(sk); | |
222 | timeo = schedule_timeout(timeo); | |
223 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
c47b7c72 | 224 | } |
f9a3c20a | 225 | __set_current_state(TASK_RUNNING); |
c47b7c72 GP |
226 | remove_wait_queue(sk_sleep(sk), &wait); |
227 | ||
228 | if (err) | |
229 | goto done; | |
230 | ||
231 | newsock->state = SS_CONNECTED; | |
232 | ||
233 | BT_DBG("new socket %p", nsk); | |
234 | ||
235 | done: | |
236 | release_sock(sk); | |
237 | return err; | |
238 | } | |
239 | ||
d7175d55 GP |
240 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) |
241 | { | |
242 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
243 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 244 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
d7175d55 GP |
245 | |
246 | BT_DBG("sock %p, sk %p", sock, sk); | |
247 | ||
792039c7 | 248 | memset(la, 0, sizeof(struct sockaddr_l2)); |
d7175d55 GP |
249 | addr->sa_family = AF_BLUETOOTH; |
250 | *len = sizeof(struct sockaddr_l2); | |
251 | ||
252 | if (peer) { | |
fe4128e0 | 253 | la->l2_psm = chan->psm; |
d7175d55 | 254 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
fe4128e0 | 255 | la->l2_cid = cpu_to_le16(chan->dcid); |
d7175d55 | 256 | } else { |
0c1bc5c6 | 257 | la->l2_psm = chan->sport; |
d7175d55 | 258 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
fe4128e0 | 259 | la->l2_cid = cpu_to_le16(chan->scid); |
d7175d55 GP |
260 | } |
261 | ||
262 | return 0; | |
263 | } | |
264 | ||
99f4808d GP |
265 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
266 | { | |
267 | struct sock *sk = sock->sk; | |
4343478f | 268 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d GP |
269 | struct l2cap_options opts; |
270 | struct l2cap_conninfo cinfo; | |
271 | int len, err = 0; | |
272 | u32 opt; | |
273 | ||
274 | BT_DBG("sk %p", sk); | |
275 | ||
276 | if (get_user(len, optlen)) | |
277 | return -EFAULT; | |
278 | ||
279 | lock_sock(sk); | |
280 | ||
281 | switch (optname) { | |
282 | case L2CAP_OPTIONS: | |
e3fb592b | 283 | memset(&opts, 0, sizeof(opts)); |
0c1bc5c6 GP |
284 | opts.imtu = chan->imtu; |
285 | opts.omtu = chan->omtu; | |
286 | opts.flush_to = chan->flush_to; | |
287 | opts.mode = chan->mode; | |
47d1ec61 GP |
288 | opts.fcs = chan->fcs; |
289 | opts.max_tx = chan->max_tx; | |
6327eb98 | 290 | opts.txwin_size = chan->tx_win; |
99f4808d GP |
291 | |
292 | len = min_t(unsigned int, len, sizeof(opts)); | |
293 | if (copy_to_user(optval, (char *) &opts, len)) | |
294 | err = -EFAULT; | |
295 | ||
296 | break; | |
297 | ||
298 | case L2CAP_LM: | |
4343478f | 299 | switch (chan->sec_level) { |
99f4808d GP |
300 | case BT_SECURITY_LOW: |
301 | opt = L2CAP_LM_AUTH; | |
302 | break; | |
303 | case BT_SECURITY_MEDIUM: | |
304 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
305 | break; | |
306 | case BT_SECURITY_HIGH: | |
307 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
308 | L2CAP_LM_SECURE; | |
309 | break; | |
310 | default: | |
311 | opt = 0; | |
312 | break; | |
313 | } | |
314 | ||
43bd0f32 | 315 | if (test_bit(FLAG_ROLE_SWITCH, &chan->flags)) |
99f4808d GP |
316 | opt |= L2CAP_LM_MASTER; |
317 | ||
ecf61bdb | 318 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
99f4808d GP |
319 | opt |= L2CAP_LM_RELIABLE; |
320 | ||
321 | if (put_user(opt, (u32 __user *) optval)) | |
322 | err = -EFAULT; | |
323 | break; | |
324 | ||
325 | case L2CAP_CONNINFO: | |
326 | if (sk->sk_state != BT_CONNECTED && | |
c5daa683 GP |
327 | !(sk->sk_state == BT_CONNECT2 && |
328 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { | |
99f4808d GP |
329 | err = -ENOTCONN; |
330 | break; | |
331 | } | |
332 | ||
8d03e971 | 333 | memset(&cinfo, 0, sizeof(cinfo)); |
8c1d787b GP |
334 | cinfo.hci_handle = chan->conn->hcon->handle; |
335 | memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); | |
99f4808d GP |
336 | |
337 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
338 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
339 | err = -EFAULT; | |
340 | ||
341 | break; | |
342 | ||
343 | default: | |
344 | err = -ENOPROTOOPT; | |
345 | break; | |
346 | } | |
347 | ||
348 | release_sock(sk); | |
349 | return err; | |
350 | } | |
351 | ||
352 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
353 | { | |
354 | struct sock *sk = sock->sk; | |
4343478f | 355 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d | 356 | struct bt_security sec; |
14b12d0b | 357 | struct bt_power pwr; |
99f4808d GP |
358 | int len, err = 0; |
359 | ||
360 | BT_DBG("sk %p", sk); | |
361 | ||
362 | if (level == SOL_L2CAP) | |
363 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
364 | ||
365 | if (level != SOL_BLUETOOTH) | |
366 | return -ENOPROTOOPT; | |
367 | ||
368 | if (get_user(len, optlen)) | |
369 | return -EFAULT; | |
370 | ||
371 | lock_sock(sk); | |
372 | ||
373 | switch (optname) { | |
374 | case BT_SECURITY: | |
715ec005 GP |
375 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
376 | chan->chan_type != L2CAP_CHAN_RAW) { | |
99f4808d GP |
377 | err = -EINVAL; |
378 | break; | |
379 | } | |
380 | ||
8f360119 | 381 | memset(&sec, 0, sizeof(sec)); |
c6585a4d GP |
382 | if (chan->conn) |
383 | sec.level = chan->conn->hcon->sec_level; | |
384 | else | |
385 | sec.level = chan->sec_level; | |
99f4808d | 386 | |
8f360119 VCG |
387 | if (sk->sk_state == BT_CONNECTED) |
388 | sec.key_size = chan->conn->hcon->enc_key_size; | |
389 | ||
99f4808d GP |
390 | len = min_t(unsigned int, len, sizeof(sec)); |
391 | if (copy_to_user(optval, (char *) &sec, len)) | |
392 | err = -EFAULT; | |
393 | ||
394 | break; | |
395 | ||
396 | case BT_DEFER_SETUP: | |
397 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
398 | err = -EINVAL; | |
399 | break; | |
400 | } | |
401 | ||
c5daa683 GP |
402 | if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), |
403 | (u32 __user *) optval)) | |
99f4808d GP |
404 | err = -EFAULT; |
405 | ||
406 | break; | |
407 | ||
408 | case BT_FLUSHABLE: | |
d57b0e8b AE |
409 | if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags), |
410 | (u32 __user *) optval)) | |
99f4808d GP |
411 | err = -EFAULT; |
412 | ||
413 | break; | |
414 | ||
14b12d0b JG |
415 | case BT_POWER: |
416 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
417 | && sk->sk_type != SOCK_RAW) { | |
418 | err = -EINVAL; | |
419 | break; | |
420 | } | |
421 | ||
15770b1a | 422 | pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
14b12d0b JG |
423 | |
424 | len = min_t(unsigned int, len, sizeof(pwr)); | |
425 | if (copy_to_user(optval, (char *) &pwr, len)) | |
426 | err = -EFAULT; | |
427 | ||
428 | break; | |
429 | ||
2ea66482 MM |
430 | case BT_CHANNEL_POLICY: |
431 | if (!enable_hs) { | |
432 | err = -ENOPROTOOPT; | |
433 | break; | |
434 | } | |
435 | ||
436 | if (put_user(chan->chan_policy, (u32 __user *) optval)) | |
437 | err = -EFAULT; | |
438 | break; | |
439 | ||
99f4808d GP |
440 | default: |
441 | err = -ENOPROTOOPT; | |
442 | break; | |
443 | } | |
444 | ||
445 | release_sock(sk); | |
446 | return err; | |
447 | } | |
448 | ||
682877c3 AG |
449 | static bool l2cap_valid_mtu(struct l2cap_chan *chan, u16 mtu) |
450 | { | |
451 | switch (chan->scid) { | |
452 | case L2CAP_CID_LE_DATA: | |
8c3a4f00 | 453 | if (mtu < L2CAP_LE_MIN_MTU) |
682877c3 AG |
454 | return false; |
455 | break; | |
456 | ||
457 | default: | |
458 | if (mtu < L2CAP_DEFAULT_MIN_MTU) | |
459 | return false; | |
460 | } | |
461 | ||
462 | return true; | |
463 | } | |
464 | ||
33575df7 GP |
465 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
466 | { | |
467 | struct sock *sk = sock->sk; | |
b4450035 | 468 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 GP |
469 | struct l2cap_options opts; |
470 | int len, err = 0; | |
471 | u32 opt; | |
472 | ||
473 | BT_DBG("sk %p", sk); | |
474 | ||
475 | lock_sock(sk); | |
476 | ||
477 | switch (optname) { | |
478 | case L2CAP_OPTIONS: | |
479 | if (sk->sk_state == BT_CONNECTED) { | |
480 | err = -EINVAL; | |
481 | break; | |
482 | } | |
483 | ||
0c1bc5c6 GP |
484 | opts.imtu = chan->imtu; |
485 | opts.omtu = chan->omtu; | |
486 | opts.flush_to = chan->flush_to; | |
487 | opts.mode = chan->mode; | |
47d1ec61 GP |
488 | opts.fcs = chan->fcs; |
489 | opts.max_tx = chan->max_tx; | |
6327eb98 | 490 | opts.txwin_size = chan->tx_win; |
33575df7 GP |
491 | |
492 | len = min_t(unsigned int, sizeof(opts), optlen); | |
493 | if (copy_from_user((char *) &opts, optval, len)) { | |
494 | err = -EFAULT; | |
495 | break; | |
496 | } | |
497 | ||
6327eb98 | 498 | if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) { |
33575df7 GP |
499 | err = -EINVAL; |
500 | break; | |
501 | } | |
502 | ||
682877c3 AG |
503 | if (!l2cap_valid_mtu(chan, opts.imtu)) { |
504 | err = -EINVAL; | |
505 | break; | |
506 | } | |
507 | ||
0c1bc5c6 GP |
508 | chan->mode = opts.mode; |
509 | switch (chan->mode) { | |
33575df7 | 510 | case L2CAP_MODE_BASIC: |
c1360a1c | 511 | clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
33575df7 GP |
512 | break; |
513 | case L2CAP_MODE_ERTM: | |
514 | case L2CAP_MODE_STREAMING: | |
515 | if (!disable_ertm) | |
516 | break; | |
517 | /* fall through */ | |
518 | default: | |
519 | err = -EINVAL; | |
520 | break; | |
521 | } | |
522 | ||
0c1bc5c6 GP |
523 | chan->imtu = opts.imtu; |
524 | chan->omtu = opts.omtu; | |
47d1ec61 GP |
525 | chan->fcs = opts.fcs; |
526 | chan->max_tx = opts.max_tx; | |
6327eb98 | 527 | chan->tx_win = opts.txwin_size; |
33575df7 GP |
528 | break; |
529 | ||
530 | case L2CAP_LM: | |
531 | if (get_user(opt, (u32 __user *) optval)) { | |
532 | err = -EFAULT; | |
533 | break; | |
534 | } | |
535 | ||
536 | if (opt & L2CAP_LM_AUTH) | |
4343478f | 537 | chan->sec_level = BT_SECURITY_LOW; |
33575df7 | 538 | if (opt & L2CAP_LM_ENCRYPT) |
4343478f | 539 | chan->sec_level = BT_SECURITY_MEDIUM; |
33575df7 | 540 | if (opt & L2CAP_LM_SECURE) |
4343478f | 541 | chan->sec_level = BT_SECURITY_HIGH; |
33575df7 | 542 | |
43bd0f32 AE |
543 | if (opt & L2CAP_LM_MASTER) |
544 | set_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
545 | else | |
546 | clear_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
ecf61bdb AE |
547 | |
548 | if (opt & L2CAP_LM_RELIABLE) | |
549 | set_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
550 | else | |
551 | clear_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
33575df7 GP |
552 | break; |
553 | ||
554 | default: | |
555 | err = -ENOPROTOOPT; | |
556 | break; | |
557 | } | |
558 | ||
559 | release_sock(sk); | |
560 | return err; | |
561 | } | |
562 | ||
563 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) | |
564 | { | |
565 | struct sock *sk = sock->sk; | |
4343478f | 566 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 | 567 | struct bt_security sec; |
14b12d0b | 568 | struct bt_power pwr; |
f1cb9af5 | 569 | struct l2cap_conn *conn; |
33575df7 GP |
570 | int len, err = 0; |
571 | u32 opt; | |
572 | ||
573 | BT_DBG("sk %p", sk); | |
574 | ||
575 | if (level == SOL_L2CAP) | |
576 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
577 | ||
578 | if (level != SOL_BLUETOOTH) | |
579 | return -ENOPROTOOPT; | |
580 | ||
581 | lock_sock(sk); | |
582 | ||
583 | switch (optname) { | |
584 | case BT_SECURITY: | |
715ec005 GP |
585 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
586 | chan->chan_type != L2CAP_CHAN_RAW) { | |
33575df7 GP |
587 | err = -EINVAL; |
588 | break; | |
589 | } | |
590 | ||
591 | sec.level = BT_SECURITY_LOW; | |
592 | ||
593 | len = min_t(unsigned int, sizeof(sec), optlen); | |
594 | if (copy_from_user((char *) &sec, optval, len)) { | |
595 | err = -EFAULT; | |
596 | break; | |
597 | } | |
598 | ||
599 | if (sec.level < BT_SECURITY_LOW || | |
600 | sec.level > BT_SECURITY_HIGH) { | |
601 | err = -EINVAL; | |
602 | break; | |
603 | } | |
604 | ||
4343478f | 605 | chan->sec_level = sec.level; |
f1cb9af5 | 606 | |
0bee1d60 GP |
607 | if (!chan->conn) |
608 | break; | |
609 | ||
f1cb9af5 | 610 | conn = chan->conn; |
0bee1d60 GP |
611 | |
612 | /*change security for LE channels */ | |
613 | if (chan->scid == L2CAP_CID_LE_DATA) { | |
f1cb9af5 VCG |
614 | if (!conn->hcon->out) { |
615 | err = -EINVAL; | |
616 | break; | |
617 | } | |
618 | ||
cc110922 | 619 | if (smp_conn_security(conn->hcon, sec.level)) |
f1cb9af5 | 620 | break; |
f1cb9af5 | 621 | sk->sk_state = BT_CONFIG; |
3542b854 | 622 | chan->state = BT_CONFIG; |
0bee1d60 | 623 | |
a7d7723a GP |
624 | /* or for ACL link */ |
625 | } else if ((sk->sk_state == BT_CONNECT2 && | |
c5daa683 | 626 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) || |
a7d7723a GP |
627 | sk->sk_state == BT_CONNECTED) { |
628 | if (!l2cap_chan_check_security(chan)) | |
c5daa683 | 629 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
a7d7723a GP |
630 | else |
631 | sk->sk_state_change(sk); | |
0bee1d60 GP |
632 | } else { |
633 | err = -EINVAL; | |
f1cb9af5 | 634 | } |
33575df7 GP |
635 | break; |
636 | ||
637 | case BT_DEFER_SETUP: | |
638 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
639 | err = -EINVAL; | |
640 | break; | |
641 | } | |
642 | ||
643 | if (get_user(opt, (u32 __user *) optval)) { | |
644 | err = -EFAULT; | |
645 | break; | |
646 | } | |
647 | ||
c5daa683 GP |
648 | if (opt) |
649 | set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); | |
650 | else | |
651 | clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); | |
33575df7 GP |
652 | break; |
653 | ||
654 | case BT_FLUSHABLE: | |
655 | if (get_user(opt, (u32 __user *) optval)) { | |
656 | err = -EFAULT; | |
657 | break; | |
658 | } | |
659 | ||
660 | if (opt > BT_FLUSHABLE_ON) { | |
661 | err = -EINVAL; | |
662 | break; | |
663 | } | |
664 | ||
665 | if (opt == BT_FLUSHABLE_OFF) { | |
8c1d787b | 666 | struct l2cap_conn *conn = chan->conn; |
25985edc | 667 | /* proceed further only when we have l2cap_conn and |
33575df7 GP |
668 | No Flush support in the LM */ |
669 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { | |
670 | err = -EINVAL; | |
671 | break; | |
672 | } | |
673 | } | |
674 | ||
d57b0e8b AE |
675 | if (opt) |
676 | set_bit(FLAG_FLUSHABLE, &chan->flags); | |
677 | else | |
678 | clear_bit(FLAG_FLUSHABLE, &chan->flags); | |
33575df7 GP |
679 | break; |
680 | ||
14b12d0b JG |
681 | case BT_POWER: |
682 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && | |
683 | chan->chan_type != L2CAP_CHAN_RAW) { | |
684 | err = -EINVAL; | |
685 | break; | |
686 | } | |
687 | ||
688 | pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; | |
689 | ||
690 | len = min_t(unsigned int, sizeof(pwr), optlen); | |
691 | if (copy_from_user((char *) &pwr, optval, len)) { | |
692 | err = -EFAULT; | |
693 | break; | |
694 | } | |
15770b1a AE |
695 | |
696 | if (pwr.force_active) | |
697 | set_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
698 | else | |
699 | clear_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
14b12d0b JG |
700 | break; |
701 | ||
2ea66482 MM |
702 | case BT_CHANNEL_POLICY: |
703 | if (!enable_hs) { | |
704 | err = -ENOPROTOOPT; | |
705 | break; | |
706 | } | |
707 | ||
708 | if (get_user(opt, (u32 __user *) optval)) { | |
709 | err = -EFAULT; | |
710 | break; | |
711 | } | |
712 | ||
713 | if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) { | |
714 | err = -EINVAL; | |
715 | break; | |
716 | } | |
717 | ||
718 | if (chan->mode != L2CAP_MODE_ERTM && | |
719 | chan->mode != L2CAP_MODE_STREAMING) { | |
720 | err = -EOPNOTSUPP; | |
721 | break; | |
722 | } | |
723 | ||
724 | chan->chan_policy = (u8) opt; | |
14b12d0b JG |
725 | break; |
726 | ||
33575df7 GP |
727 | default: |
728 | err = -ENOPROTOOPT; | |
729 | break; | |
730 | } | |
731 | ||
732 | release_sock(sk); | |
733 | return err; | |
734 | } | |
fd83ccdb GP |
735 | |
736 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) | |
737 | { | |
738 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 739 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb GP |
740 | int err; |
741 | ||
742 | BT_DBG("sock %p, sk %p", sock, sk); | |
743 | ||
744 | err = sock_error(sk); | |
745 | if (err) | |
746 | return err; | |
747 | ||
748 | if (msg->msg_flags & MSG_OOB) | |
749 | return -EOPNOTSUPP; | |
750 | ||
a6a5568c | 751 | if (sk->sk_state != BT_CONNECTED) |
9a91a04a | 752 | return -ENOTCONN; |
fd83ccdb | 753 | |
a6a5568c | 754 | l2cap_chan_lock(chan); |
5e59b791 | 755 | err = l2cap_chan_send(chan, msg, len, sk->sk_priority); |
a6a5568c | 756 | l2cap_chan_unlock(chan); |
fd83ccdb | 757 | |
fd83ccdb GP |
758 | return err; |
759 | } | |
33575df7 | 760 | |
68983259 GP |
761 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
762 | { | |
763 | struct sock *sk = sock->sk; | |
e328140f MM |
764 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
765 | int err; | |
68983259 GP |
766 | |
767 | lock_sock(sk); | |
768 | ||
c5daa683 GP |
769 | if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP, |
770 | &bt_sk(sk)->flags)) { | |
8c1d787b | 771 | sk->sk_state = BT_CONFIG; |
3542b854 | 772 | pi->chan->state = BT_CONFIG; |
8c1d787b | 773 | |
e328140f | 774 | __l2cap_connect_rsp_defer(pi->chan); |
68983259 GP |
775 | release_sock(sk); |
776 | return 0; | |
777 | } | |
778 | ||
779 | release_sock(sk); | |
780 | ||
781 | if (sock->type == SOCK_STREAM) | |
e328140f MM |
782 | err = bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); |
783 | else | |
784 | err = bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
785 | ||
786 | if (pi->chan->mode != L2CAP_MODE_ERTM) | |
787 | return err; | |
788 | ||
789 | /* Attempt to put pending rx data in the socket buffer */ | |
790 | ||
791 | lock_sock(sk); | |
792 | ||
793 | if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state)) | |
794 | goto done; | |
795 | ||
796 | if (pi->rx_busy_skb) { | |
797 | if (!sock_queue_rcv_skb(sk, pi->rx_busy_skb)) | |
798 | pi->rx_busy_skb = NULL; | |
799 | else | |
800 | goto done; | |
801 | } | |
802 | ||
803 | /* Restore data flow when half of the receive buffer is | |
804 | * available. This avoids resending large numbers of | |
805 | * frames. | |
806 | */ | |
807 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1) | |
808 | l2cap_chan_busy(pi->chan, 0); | |
68983259 | 809 | |
e328140f MM |
810 | done: |
811 | release_sock(sk); | |
812 | return err; | |
68983259 GP |
813 | } |
814 | ||
05fc1576 GP |
815 | /* Kill socket (only if zapped and orphan) |
816 | * Must be called on unlocked socket. | |
817 | */ | |
ba3bd0ee | 818 | static void l2cap_sock_kill(struct sock *sk) |
05fc1576 GP |
819 | { |
820 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
821 | return; | |
822 | ||
e05dcc32 | 823 | BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state)); |
05fc1576 GP |
824 | |
825 | /* Kill poor orphan */ | |
6ff5abbf | 826 | |
23691d75 | 827 | l2cap_chan_destroy(l2cap_pi(sk)->chan); |
05fc1576 GP |
828 | sock_set_flag(sk, SOCK_DEAD); |
829 | sock_put(sk); | |
830 | } | |
831 | ||
dcba0dba GP |
832 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
833 | { | |
834 | struct sock *sk = sock->sk; | |
7ddb6e0f | 835 | struct l2cap_chan *chan; |
3df91ea2 | 836 | struct l2cap_conn *conn; |
dcba0dba GP |
837 | int err = 0; |
838 | ||
839 | BT_DBG("sock %p, sk %p", sock, sk); | |
840 | ||
841 | if (!sk) | |
842 | return 0; | |
843 | ||
7ddb6e0f | 844 | chan = l2cap_pi(sk)->chan; |
3df91ea2 AE |
845 | conn = chan->conn; |
846 | ||
847 | if (conn) | |
848 | mutex_lock(&conn->chan_lock); | |
7ddb6e0f | 849 | |
6be36555 | 850 | l2cap_chan_lock(chan); |
dcba0dba | 851 | lock_sock(sk); |
6be36555 | 852 | |
dcba0dba | 853 | if (!sk->sk_shutdown) { |
0c1bc5c6 | 854 | if (chan->mode == L2CAP_MODE_ERTM) |
dcba0dba GP |
855 | err = __l2cap_wait_ack(sk); |
856 | ||
857 | sk->sk_shutdown = SHUTDOWN_MASK; | |
3df91ea2 | 858 | |
6be36555 | 859 | release_sock(sk); |
0f852724 | 860 | l2cap_chan_close(chan, 0); |
6be36555 | 861 | lock_sock(sk); |
dcba0dba GP |
862 | |
863 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
864 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
865 | sk->sk_lingertime); | |
866 | } | |
867 | ||
868 | if (!err && sk->sk_err) | |
869 | err = -sk->sk_err; | |
870 | ||
871 | release_sock(sk); | |
6be36555 | 872 | l2cap_chan_unlock(chan); |
3df91ea2 AE |
873 | |
874 | if (conn) | |
875 | mutex_unlock(&conn->chan_lock); | |
876 | ||
dcba0dba GP |
877 | return err; |
878 | } | |
879 | ||
554f05bb GP |
880 | static int l2cap_sock_release(struct socket *sock) |
881 | { | |
882 | struct sock *sk = sock->sk; | |
883 | int err; | |
884 | ||
885 | BT_DBG("sock %p, sk %p", sock, sk); | |
886 | ||
887 | if (!sk) | |
888 | return 0; | |
889 | ||
890 | err = l2cap_sock_shutdown(sock, 2); | |
891 | ||
892 | sock_orphan(sk); | |
893 | l2cap_sock_kill(sk); | |
894 | return err; | |
895 | } | |
896 | ||
c0df7f6e AE |
897 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
898 | { | |
899 | struct sock *sk; | |
900 | ||
901 | BT_DBG("parent %p", parent); | |
902 | ||
903 | /* Close not yet accepted channels */ | |
904 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
905 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
906 | ||
907 | l2cap_chan_lock(chan); | |
908 | __clear_chan_timer(chan); | |
909 | l2cap_chan_close(chan, ECONNRESET); | |
910 | l2cap_chan_unlock(chan); | |
911 | ||
912 | l2cap_sock_kill(sk); | |
913 | } | |
914 | } | |
915 | ||
80b98027 | 916 | static struct l2cap_chan *l2cap_sock_new_connection_cb(struct l2cap_chan *chan) |
80808e43 | 917 | { |
80b98027 | 918 | struct sock *sk, *parent = chan->data; |
80808e43 | 919 | |
53826692 GP |
920 | /* Check for backlog size */ |
921 | if (sk_acceptq_is_full(parent)) { | |
922 | BT_DBG("backlog full %d", parent->sk_ack_backlog); | |
923 | return NULL; | |
924 | } | |
925 | ||
80808e43 GP |
926 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, |
927 | GFP_ATOMIC); | |
928 | if (!sk) | |
929 | return NULL; | |
930 | ||
d22015aa OP |
931 | bt_sock_reclassify_lock(sk, BTPROTO_L2CAP); |
932 | ||
80808e43 GP |
933 | l2cap_sock_init(sk, parent); |
934 | ||
935 | return l2cap_pi(sk)->chan; | |
936 | } | |
937 | ||
80b98027 | 938 | static int l2cap_sock_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) |
23070494 | 939 | { |
e328140f | 940 | int err; |
80b98027 | 941 | struct sock *sk = chan->data; |
e328140f MM |
942 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
943 | ||
6be36555 AE |
944 | lock_sock(sk); |
945 | ||
946 | if (pi->rx_busy_skb) { | |
947 | err = -ENOMEM; | |
948 | goto done; | |
949 | } | |
e328140f MM |
950 | |
951 | err = sock_queue_rcv_skb(sk, skb); | |
952 | ||
953 | /* For ERTM, handle one skb that doesn't fit into the recv | |
954 | * buffer. This is important to do because the data frames | |
955 | * have already been acked, so the skb cannot be discarded. | |
956 | * | |
957 | * Notify the l2cap core that the buffer is full, so the | |
958 | * LOCAL_BUSY state is entered and no more frames are | |
959 | * acked and reassembled until there is buffer space | |
960 | * available. | |
961 | */ | |
962 | if (err < 0 && pi->chan->mode == L2CAP_MODE_ERTM) { | |
963 | pi->rx_busy_skb = skb; | |
964 | l2cap_chan_busy(pi->chan, 1); | |
965 | err = 0; | |
966 | } | |
23070494 | 967 | |
6be36555 AE |
968 | done: |
969 | release_sock(sk); | |
970 | ||
e328140f | 971 | return err; |
23070494 GP |
972 | } |
973 | ||
80b98027 | 974 | static void l2cap_sock_close_cb(struct l2cap_chan *chan) |
ba3bd0ee | 975 | { |
80b98027 | 976 | struct sock *sk = chan->data; |
ba3bd0ee GP |
977 | |
978 | l2cap_sock_kill(sk); | |
979 | } | |
980 | ||
c0df7f6e AE |
981 | static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err) |
982 | { | |
983 | struct sock *sk = chan->data; | |
984 | struct sock *parent; | |
985 | ||
986 | lock_sock(sk); | |
987 | ||
988 | parent = bt_sk(sk)->parent; | |
989 | ||
990 | sock_set_flag(sk, SOCK_ZAPPED); | |
991 | ||
992 | switch (chan->state) { | |
993 | case BT_OPEN: | |
994 | case BT_BOUND: | |
995 | case BT_CLOSED: | |
996 | break; | |
997 | case BT_LISTEN: | |
998 | l2cap_sock_cleanup_listen(sk); | |
999 | sk->sk_state = BT_CLOSED; | |
1000 | chan->state = BT_CLOSED; | |
1001 | ||
1002 | break; | |
1003 | default: | |
1004 | sk->sk_state = BT_CLOSED; | |
1005 | chan->state = BT_CLOSED; | |
1006 | ||
1007 | sk->sk_err = err; | |
1008 | ||
1009 | if (parent) { | |
1010 | bt_accept_unlink(sk); | |
1011 | parent->sk_data_ready(parent, 0); | |
1012 | } else { | |
1013 | sk->sk_state_change(sk); | |
1014 | } | |
1015 | ||
1016 | break; | |
1017 | } | |
1018 | ||
1019 | release_sock(sk); | |
1020 | } | |
1021 | ||
80b98027 | 1022 | static void l2cap_sock_state_change_cb(struct l2cap_chan *chan, int state) |
89bc500e | 1023 | { |
80b98027 | 1024 | struct sock *sk = chan->data; |
89bc500e GP |
1025 | |
1026 | sk->sk_state = state; | |
1027 | } | |
1028 | ||
2f7719ce | 1029 | static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan, |
90338947 | 1030 | unsigned long len, int nb) |
2f7719ce | 1031 | { |
90338947 GP |
1032 | struct sk_buff *skb; |
1033 | int err; | |
1034 | ||
a6a5568c | 1035 | l2cap_chan_unlock(chan); |
90338947 | 1036 | skb = bt_skb_send_alloc(chan->sk, len, nb, &err); |
a6a5568c MM |
1037 | l2cap_chan_lock(chan); |
1038 | ||
90338947 GP |
1039 | if (!skb) |
1040 | return ERR_PTR(err); | |
2f7719ce | 1041 | |
90338947 | 1042 | return skb; |
2f7719ce AE |
1043 | } |
1044 | ||
54a59aa2 AE |
1045 | static void l2cap_sock_ready_cb(struct l2cap_chan *chan) |
1046 | { | |
1047 | struct sock *sk = chan->data; | |
1048 | struct sock *parent; | |
1049 | ||
1050 | lock_sock(sk); | |
1051 | ||
1052 | parent = bt_sk(sk)->parent; | |
1053 | ||
1054 | BT_DBG("sk %p, parent %p", sk, parent); | |
1055 | ||
1056 | sk->sk_state = BT_CONNECTED; | |
1057 | sk->sk_state_change(sk); | |
1058 | ||
1059 | if (parent) | |
1060 | parent->sk_data_ready(parent, 0); | |
1061 | ||
1062 | release_sock(sk); | |
1063 | } | |
1064 | ||
80808e43 GP |
1065 | static struct l2cap_ops l2cap_chan_ops = { |
1066 | .name = "L2CAP Socket Interface", | |
1067 | .new_connection = l2cap_sock_new_connection_cb, | |
23070494 | 1068 | .recv = l2cap_sock_recv_cb, |
ba3bd0ee | 1069 | .close = l2cap_sock_close_cb, |
c0df7f6e | 1070 | .teardown = l2cap_sock_teardown_cb, |
89bc500e | 1071 | .state_change = l2cap_sock_state_change_cb, |
54a59aa2 | 1072 | .ready = l2cap_sock_ready_cb, |
2f7719ce | 1073 | .alloc_skb = l2cap_sock_alloc_skb_cb, |
80808e43 GP |
1074 | }; |
1075 | ||
bb58f747 GP |
1076 | static void l2cap_sock_destruct(struct sock *sk) |
1077 | { | |
1078 | BT_DBG("sk %p", sk); | |
1079 | ||
61d6ef3e | 1080 | l2cap_chan_put(l2cap_pi(sk)->chan); |
e328140f MM |
1081 | if (l2cap_pi(sk)->rx_busy_skb) { |
1082 | kfree_skb(l2cap_pi(sk)->rx_busy_skb); | |
1083 | l2cap_pi(sk)->rx_busy_skb = NULL; | |
1084 | } | |
1085 | ||
bb58f747 GP |
1086 | skb_queue_purge(&sk->sk_receive_queue); |
1087 | skb_queue_purge(&sk->sk_write_queue); | |
1088 | } | |
1089 | ||
80808e43 | 1090 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747 GP |
1091 | { |
1092 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
b4450035 | 1093 | struct l2cap_chan *chan = pi->chan; |
bb58f747 GP |
1094 | |
1095 | BT_DBG("sk %p", sk); | |
1096 | ||
1097 | if (parent) { | |
b4450035 GP |
1098 | struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
1099 | ||
bb58f747 | 1100 | sk->sk_type = parent->sk_type; |
c5daa683 | 1101 | bt_sk(sk)->flags = bt_sk(parent)->flags; |
bb58f747 | 1102 | |
715ec005 | 1103 | chan->chan_type = pchan->chan_type; |
0c1bc5c6 GP |
1104 | chan->imtu = pchan->imtu; |
1105 | chan->omtu = pchan->omtu; | |
b4450035 | 1106 | chan->conf_state = pchan->conf_state; |
0c1bc5c6 | 1107 | chan->mode = pchan->mode; |
47d1ec61 GP |
1108 | chan->fcs = pchan->fcs; |
1109 | chan->max_tx = pchan->max_tx; | |
1110 | chan->tx_win = pchan->tx_win; | |
6b3c7104 | 1111 | chan->tx_win_max = pchan->tx_win_max; |
4343478f | 1112 | chan->sec_level = pchan->sec_level; |
d57b0e8b | 1113 | chan->flags = pchan->flags; |
6230c9b4 PM |
1114 | |
1115 | security_sk_clone(parent, sk); | |
bb58f747 | 1116 | } else { |
715ec005 GP |
1117 | |
1118 | switch (sk->sk_type) { | |
1119 | case SOCK_RAW: | |
1120 | chan->chan_type = L2CAP_CHAN_RAW; | |
1121 | break; | |
1122 | case SOCK_DGRAM: | |
1123 | chan->chan_type = L2CAP_CHAN_CONN_LESS; | |
1124 | break; | |
1125 | case SOCK_SEQPACKET: | |
1126 | case SOCK_STREAM: | |
1127 | chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; | |
1128 | break; | |
1129 | } | |
1130 | ||
0c1bc5c6 GP |
1131 | chan->imtu = L2CAP_DEFAULT_MTU; |
1132 | chan->omtu = 0; | |
bb58f747 | 1133 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c6 | 1134 | chan->mode = L2CAP_MODE_ERTM; |
c1360a1c | 1135 | set_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
bb58f747 | 1136 | } else { |
0c1bc5c6 | 1137 | chan->mode = L2CAP_MODE_BASIC; |
bb58f747 | 1138 | } |
bd4b1653 AE |
1139 | |
1140 | l2cap_chan_set_defaults(chan); | |
bb58f747 GP |
1141 | } |
1142 | ||
1143 | /* Default config options */ | |
0c1bc5c6 | 1144 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e43 GP |
1145 | |
1146 | chan->data = sk; | |
1147 | chan->ops = &l2cap_chan_ops; | |
bb58f747 GP |
1148 | } |
1149 | ||
1150 | static struct proto l2cap_proto = { | |
1151 | .name = "L2CAP", | |
1152 | .owner = THIS_MODULE, | |
1153 | .obj_size = sizeof(struct l2cap_pinfo) | |
1154 | }; | |
1155 | ||
80808e43 | 1156 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
bb58f747 GP |
1157 | { |
1158 | struct sock *sk; | |
dc50a06d | 1159 | struct l2cap_chan *chan; |
bb58f747 GP |
1160 | |
1161 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); | |
1162 | if (!sk) | |
1163 | return NULL; | |
1164 | ||
1165 | sock_init_data(sock, sk); | |
1166 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
1167 | ||
1168 | sk->sk_destruct = l2cap_sock_destruct; | |
ba13ccd9 | 1169 | sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; |
bb58f747 GP |
1170 | |
1171 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1172 | ||
1173 | sk->sk_protocol = proto; | |
1174 | sk->sk_state = BT_OPEN; | |
1175 | ||
eef1d9b6 | 1176 | chan = l2cap_chan_create(); |
dc50a06d | 1177 | if (!chan) { |
49dfbb91 | 1178 | sk_free(sk); |
dc50a06d GP |
1179 | return NULL; |
1180 | } | |
1181 | ||
61d6ef3e MM |
1182 | l2cap_chan_hold(chan); |
1183 | ||
eef1d9b6 GP |
1184 | chan->sk = sk; |
1185 | ||
dc50a06d GP |
1186 | l2cap_pi(sk)->chan = chan; |
1187 | ||
bb58f747 GP |
1188 | return sk; |
1189 | } | |
1190 | ||
1191 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
1192 | int kern) | |
1193 | { | |
1194 | struct sock *sk; | |
1195 | ||
1196 | BT_DBG("sock %p", sock); | |
1197 | ||
1198 | sock->state = SS_UNCONNECTED; | |
1199 | ||
1200 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
1201 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) | |
1202 | return -ESOCKTNOSUPPORT; | |
1203 | ||
1204 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
1205 | return -EPERM; | |
1206 | ||
1207 | sock->ops = &l2cap_sock_ops; | |
1208 | ||
1209 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); | |
1210 | if (!sk) | |
1211 | return -ENOMEM; | |
1212 | ||
1213 | l2cap_sock_init(sk, NULL); | |
1214 | return 0; | |
1215 | } | |
1216 | ||
cf2f90f5 | 1217 | static const struct proto_ops l2cap_sock_ops = { |
65390587 GP |
1218 | .family = PF_BLUETOOTH, |
1219 | .owner = THIS_MODULE, | |
1220 | .release = l2cap_sock_release, | |
1221 | .bind = l2cap_sock_bind, | |
1222 | .connect = l2cap_sock_connect, | |
1223 | .listen = l2cap_sock_listen, | |
1224 | .accept = l2cap_sock_accept, | |
1225 | .getname = l2cap_sock_getname, | |
1226 | .sendmsg = l2cap_sock_sendmsg, | |
1227 | .recvmsg = l2cap_sock_recvmsg, | |
1228 | .poll = bt_sock_poll, | |
1229 | .ioctl = bt_sock_ioctl, | |
1230 | .mmap = sock_no_mmap, | |
1231 | .socketpair = sock_no_socketpair, | |
1232 | .shutdown = l2cap_sock_shutdown, | |
1233 | .setsockopt = l2cap_sock_setsockopt, | |
1234 | .getsockopt = l2cap_sock_getsockopt | |
1235 | }; | |
1236 | ||
bb58f747 GP |
1237 | static const struct net_proto_family l2cap_sock_family_ops = { |
1238 | .family = PF_BLUETOOTH, | |
1239 | .owner = THIS_MODULE, | |
1240 | .create = l2cap_sock_create, | |
1241 | }; | |
1242 | ||
1243 | int __init l2cap_init_sockets(void) | |
1244 | { | |
e2174ca4 | 1245 | int err; |
bb58f747 | 1246 | |
e2174ca4 GP |
1247 | err = proto_register(&l2cap_proto, 0); |
1248 | if (err < 0) | |
1249 | return err; | |
bb58f747 | 1250 | |
e2174ca4 GP |
1251 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
1252 | if (err < 0) | |
1253 | goto error; | |
bb58f747 | 1254 | |
e2174ca4 | 1255 | BT_INFO("L2CAP socket layer initialized"); |
bb58f747 | 1256 | |
e2174ca4 | 1257 | return 0; |
bb58f747 GP |
1258 | |
1259 | error: | |
e2174ca4 GP |
1260 | BT_ERR("L2CAP socket registration failed"); |
1261 | proto_unregister(&l2cap_proto); | |
1262 | return err; | |
bb58f747 GP |
1263 | } |
1264 | ||
1265 | void l2cap_cleanup_sockets(void) | |
1266 | { | |
e2174ca4 GP |
1267 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) |
1268 | BT_ERR("L2CAP socket unregistration failed"); | |
bb58f747 | 1269 | |
e2174ca4 | 1270 | proto_unregister(&l2cap_proto); |
bb58f747 | 1271 | } |