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 | |
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 | 42 | static void l2cap_sock_init(struct sock *sk, struct sock *parent); |
2d792818 GP |
43 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
44 | int proto, gfp_t prio); | |
cf2f90f5 | 45 | |
af6bcd82 GP |
46 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
47 | { | |
48 | struct sock *sk = sock->sk; | |
4343478f | 49 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
50 | struct sockaddr_l2 la; |
51 | int len, err = 0; | |
52 | ||
53 | BT_DBG("sk %p", sk); | |
54 | ||
55 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
56 | return -EINVAL; | |
57 | ||
58 | memset(&la, 0, sizeof(la)); | |
59 | len = min_t(unsigned int, sizeof(la), alen); | |
60 | memcpy(&la, addr, len); | |
61 | ||
b62f328b | 62 | if (la.l2_cid && la.l2_psm) |
af6bcd82 GP |
63 | return -EINVAL; |
64 | ||
65 | lock_sock(sk); | |
66 | ||
67 | if (sk->sk_state != BT_OPEN) { | |
68 | err = -EBADFD; | |
69 | goto done; | |
70 | } | |
71 | ||
72 | if (la.l2_psm) { | |
73 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
74 | ||
75 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
76 | if ((psm & 0x0101) != 0x0001) { | |
77 | err = -EINVAL; | |
78 | goto done; | |
79 | } | |
80 | ||
81 | /* Restrict usage of well-known PSMs */ | |
82 | if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { | |
83 | err = -EACCES; | |
84 | goto done; | |
85 | } | |
86 | } | |
87 | ||
9e4425ff | 88 | if (la.l2_cid) |
6e4aff10 | 89 | err = l2cap_add_scid(chan, __le16_to_cpu(la.l2_cid)); |
9e4425ff GP |
90 | else |
91 | err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm); | |
af6bcd82 | 92 | |
9e4425ff GP |
93 | if (err < 0) |
94 | goto done; | |
af6bcd82 | 95 | |
2983fd68 AE |
96 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_SDP || |
97 | __le16_to_cpu(la.l2_psm) == L2CAP_PSM_RFCOMM) | |
9e4425ff | 98 | chan->sec_level = BT_SECURITY_SDP; |
b62f328b | 99 | |
9e4425ff | 100 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
89bc500e GP |
101 | |
102 | chan->state = BT_BOUND; | |
9e4425ff | 103 | sk->sk_state = BT_BOUND; |
af6bcd82 GP |
104 | |
105 | done: | |
106 | release_sock(sk); | |
107 | return err; | |
108 | } | |
109 | ||
2d792818 GP |
110 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, |
111 | int alen, int flags) | |
4e34c50b GP |
112 | { |
113 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 114 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
4e34c50b GP |
115 | struct sockaddr_l2 la; |
116 | int len, err = 0; | |
117 | ||
118 | BT_DBG("sk %p", sk); | |
119 | ||
120 | if (!addr || alen < sizeof(addr->sa_family) || | |
121 | addr->sa_family != AF_BLUETOOTH) | |
122 | return -EINVAL; | |
123 | ||
124 | memset(&la, 0, sizeof(la)); | |
125 | len = min_t(unsigned int, sizeof(la), alen); | |
126 | memcpy(&la, addr, len); | |
127 | ||
acd7d370 | 128 | if (la.l2_cid && la.l2_psm) |
4e34c50b GP |
129 | return -EINVAL; |
130 | ||
6e4aff10 | 131 | err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid), |
8e9f9892 | 132 | &la.l2_bdaddr, la.l2_bdaddr_type); |
4e34c50b | 133 | if (err) |
b3fb611e | 134 | return err; |
4e34c50b | 135 | |
6be36555 AE |
136 | lock_sock(sk); |
137 | ||
4e34c50b | 138 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
2d792818 | 139 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
b3fb611e AE |
140 | |
141 | release_sock(sk); | |
142 | ||
4e34c50b GP |
143 | return err; |
144 | } | |
145 | ||
af6bcd82 GP |
146 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
147 | { | |
148 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 149 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
150 | int err = 0; |
151 | ||
152 | BT_DBG("sk %p backlog %d", sk, backlog); | |
153 | ||
154 | lock_sock(sk); | |
155 | ||
6b3af733 | 156 | if (sk->sk_state != BT_BOUND) { |
af6bcd82 GP |
157 | err = -EBADFD; |
158 | goto done; | |
159 | } | |
160 | ||
6b3af733 MH |
161 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) { |
162 | err = -EINVAL; | |
163 | goto done; | |
164 | } | |
165 | ||
0c1bc5c6 | 166 | switch (chan->mode) { |
af6bcd82 GP |
167 | case L2CAP_MODE_BASIC: |
168 | break; | |
169 | case L2CAP_MODE_ERTM: | |
170 | case L2CAP_MODE_STREAMING: | |
171 | if (!disable_ertm) | |
172 | break; | |
173 | /* fall through */ | |
174 | default: | |
175 | err = -ENOTSUPP; | |
176 | goto done; | |
177 | } | |
178 | ||
af6bcd82 GP |
179 | sk->sk_max_ack_backlog = backlog; |
180 | sk->sk_ack_backlog = 0; | |
89bc500e GP |
181 | |
182 | chan->state = BT_LISTEN; | |
af6bcd82 GP |
183 | sk->sk_state = BT_LISTEN; |
184 | ||
185 | done: | |
186 | release_sock(sk); | |
187 | return err; | |
188 | } | |
189 | ||
2d792818 GP |
190 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, |
191 | int flags) | |
c47b7c72 GP |
192 | { |
193 | DECLARE_WAITQUEUE(wait, current); | |
194 | struct sock *sk = sock->sk, *nsk; | |
195 | long timeo; | |
196 | int err = 0; | |
197 | ||
198 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
199 | ||
c47b7c72 GP |
200 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
201 | ||
202 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
203 | ||
204 | /* Wait for an incoming connection. (wake-one). */ | |
205 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
f9a3c20a | 206 | while (1) { |
c47b7c72 | 207 | set_current_state(TASK_INTERRUPTIBLE); |
f9a3c20a PH |
208 | |
209 | if (sk->sk_state != BT_LISTEN) { | |
210 | err = -EBADFD; | |
c47b7c72 GP |
211 | break; |
212 | } | |
213 | ||
f9a3c20a PH |
214 | nsk = bt_accept_dequeue(sk, newsock); |
215 | if (nsk) | |
216 | break; | |
c47b7c72 | 217 | |
f9a3c20a PH |
218 | if (!timeo) { |
219 | err = -EAGAIN; | |
c47b7c72 GP |
220 | break; |
221 | } | |
222 | ||
223 | if (signal_pending(current)) { | |
224 | err = sock_intr_errno(timeo); | |
225 | break; | |
226 | } | |
f9a3c20a PH |
227 | |
228 | release_sock(sk); | |
229 | timeo = schedule_timeout(timeo); | |
230 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
c47b7c72 | 231 | } |
f9a3c20a | 232 | __set_current_state(TASK_RUNNING); |
c47b7c72 GP |
233 | remove_wait_queue(sk_sleep(sk), &wait); |
234 | ||
235 | if (err) | |
236 | goto done; | |
237 | ||
238 | newsock->state = SS_CONNECTED; | |
239 | ||
240 | BT_DBG("new socket %p", nsk); | |
241 | ||
242 | done: | |
243 | release_sock(sk); | |
244 | return err; | |
245 | } | |
246 | ||
2d792818 GP |
247 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, |
248 | int *len, int peer) | |
d7175d55 GP |
249 | { |
250 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
251 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 252 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
d7175d55 GP |
253 | |
254 | BT_DBG("sock %p, sk %p", sock, sk); | |
255 | ||
792039c7 | 256 | memset(la, 0, sizeof(struct sockaddr_l2)); |
d7175d55 GP |
257 | addr->sa_family = AF_BLUETOOTH; |
258 | *len = sizeof(struct sockaddr_l2); | |
259 | ||
260 | if (peer) { | |
fe4128e0 | 261 | la->l2_psm = chan->psm; |
d7175d55 | 262 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
fe4128e0 | 263 | la->l2_cid = cpu_to_le16(chan->dcid); |
d7175d55 | 264 | } else { |
0c1bc5c6 | 265 | la->l2_psm = chan->sport; |
d7175d55 | 266 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
fe4128e0 | 267 | la->l2_cid = cpu_to_le16(chan->scid); |
d7175d55 GP |
268 | } |
269 | ||
270 | return 0; | |
271 | } | |
272 | ||
2d792818 GP |
273 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, |
274 | char __user *optval, int __user *optlen) | |
99f4808d GP |
275 | { |
276 | struct sock *sk = sock->sk; | |
4343478f | 277 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d GP |
278 | struct l2cap_options opts; |
279 | struct l2cap_conninfo cinfo; | |
280 | int len, err = 0; | |
281 | u32 opt; | |
282 | ||
283 | BT_DBG("sk %p", sk); | |
284 | ||
285 | if (get_user(len, optlen)) | |
286 | return -EFAULT; | |
287 | ||
288 | lock_sock(sk); | |
289 | ||
290 | switch (optname) { | |
291 | case L2CAP_OPTIONS: | |
e3fb592b | 292 | memset(&opts, 0, sizeof(opts)); |
0c1bc5c6 GP |
293 | opts.imtu = chan->imtu; |
294 | opts.omtu = chan->omtu; | |
295 | opts.flush_to = chan->flush_to; | |
296 | opts.mode = chan->mode; | |
47d1ec61 GP |
297 | opts.fcs = chan->fcs; |
298 | opts.max_tx = chan->max_tx; | |
6327eb98 | 299 | opts.txwin_size = chan->tx_win; |
99f4808d GP |
300 | |
301 | len = min_t(unsigned int, len, sizeof(opts)); | |
302 | if (copy_to_user(optval, (char *) &opts, len)) | |
303 | err = -EFAULT; | |
304 | ||
305 | break; | |
306 | ||
307 | case L2CAP_LM: | |
4343478f | 308 | switch (chan->sec_level) { |
99f4808d GP |
309 | case BT_SECURITY_LOW: |
310 | opt = L2CAP_LM_AUTH; | |
311 | break; | |
312 | case BT_SECURITY_MEDIUM: | |
313 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
314 | break; | |
315 | case BT_SECURITY_HIGH: | |
316 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
2d792818 | 317 | L2CAP_LM_SECURE; |
99f4808d GP |
318 | break; |
319 | default: | |
320 | opt = 0; | |
321 | break; | |
322 | } | |
323 | ||
43bd0f32 | 324 | if (test_bit(FLAG_ROLE_SWITCH, &chan->flags)) |
99f4808d GP |
325 | opt |= L2CAP_LM_MASTER; |
326 | ||
ecf61bdb | 327 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
99f4808d GP |
328 | opt |= L2CAP_LM_RELIABLE; |
329 | ||
330 | if (put_user(opt, (u32 __user *) optval)) | |
331 | err = -EFAULT; | |
332 | break; | |
333 | ||
334 | case L2CAP_CONNINFO: | |
335 | if (sk->sk_state != BT_CONNECTED && | |
c5daa683 GP |
336 | !(sk->sk_state == BT_CONNECT2 && |
337 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { | |
99f4808d GP |
338 | err = -ENOTCONN; |
339 | break; | |
340 | } | |
341 | ||
8d03e971 | 342 | memset(&cinfo, 0, sizeof(cinfo)); |
8c1d787b GP |
343 | cinfo.hci_handle = chan->conn->hcon->handle; |
344 | memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); | |
99f4808d GP |
345 | |
346 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
347 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
348 | err = -EFAULT; | |
349 | ||
350 | break; | |
351 | ||
352 | default: | |
353 | err = -ENOPROTOOPT; | |
354 | break; | |
355 | } | |
356 | ||
357 | release_sock(sk); | |
358 | return err; | |
359 | } | |
360 | ||
2d792818 GP |
361 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, |
362 | char __user *optval, int __user *optlen) | |
99f4808d GP |
363 | { |
364 | struct sock *sk = sock->sk; | |
4343478f | 365 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d | 366 | struct bt_security sec; |
14b12d0b | 367 | struct bt_power pwr; |
99f4808d GP |
368 | int len, err = 0; |
369 | ||
370 | BT_DBG("sk %p", sk); | |
371 | ||
372 | if (level == SOL_L2CAP) | |
373 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
374 | ||
375 | if (level != SOL_BLUETOOTH) | |
376 | return -ENOPROTOOPT; | |
377 | ||
378 | if (get_user(len, optlen)) | |
379 | return -EFAULT; | |
380 | ||
381 | lock_sock(sk); | |
382 | ||
383 | switch (optname) { | |
384 | case BT_SECURITY: | |
715ec005 | 385 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
2d792818 | 386 | chan->chan_type != L2CAP_CHAN_RAW) { |
99f4808d GP |
387 | err = -EINVAL; |
388 | break; | |
389 | } | |
390 | ||
8f360119 | 391 | memset(&sec, 0, sizeof(sec)); |
85e34368 | 392 | if (chan->conn) { |
c6585a4d | 393 | sec.level = chan->conn->hcon->sec_level; |
99f4808d | 394 | |
85e34368 AE |
395 | if (sk->sk_state == BT_CONNECTED) |
396 | sec.key_size = chan->conn->hcon->enc_key_size; | |
397 | } else { | |
398 | sec.level = chan->sec_level; | |
399 | } | |
8f360119 | 400 | |
99f4808d GP |
401 | len = min_t(unsigned int, len, sizeof(sec)); |
402 | if (copy_to_user(optval, (char *) &sec, len)) | |
403 | err = -EFAULT; | |
404 | ||
405 | break; | |
406 | ||
407 | case BT_DEFER_SETUP: | |
408 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
409 | err = -EINVAL; | |
410 | break; | |
411 | } | |
412 | ||
c5daa683 GP |
413 | if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), |
414 | (u32 __user *) optval)) | |
99f4808d GP |
415 | err = -EFAULT; |
416 | ||
417 | break; | |
418 | ||
419 | case BT_FLUSHABLE: | |
d57b0e8b | 420 | if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags), |
2d792818 | 421 | (u32 __user *) optval)) |
99f4808d GP |
422 | err = -EFAULT; |
423 | ||
424 | break; | |
425 | ||
14b12d0b JG |
426 | case BT_POWER: |
427 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
2d792818 | 428 | && sk->sk_type != SOCK_RAW) { |
14b12d0b JG |
429 | err = -EINVAL; |
430 | break; | |
431 | } | |
432 | ||
15770b1a | 433 | pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
14b12d0b JG |
434 | |
435 | len = min_t(unsigned int, len, sizeof(pwr)); | |
436 | if (copy_to_user(optval, (char *) &pwr, len)) | |
437 | err = -EFAULT; | |
438 | ||
439 | break; | |
440 | ||
2ea66482 MM |
441 | case BT_CHANNEL_POLICY: |
442 | if (!enable_hs) { | |
443 | err = -ENOPROTOOPT; | |
444 | break; | |
445 | } | |
446 | ||
447 | if (put_user(chan->chan_policy, (u32 __user *) optval)) | |
448 | err = -EFAULT; | |
449 | break; | |
450 | ||
99f4808d GP |
451 | default: |
452 | err = -ENOPROTOOPT; | |
453 | break; | |
454 | } | |
455 | ||
456 | release_sock(sk); | |
457 | return err; | |
458 | } | |
459 | ||
682877c3 AG |
460 | static bool l2cap_valid_mtu(struct l2cap_chan *chan, u16 mtu) |
461 | { | |
462 | switch (chan->scid) { | |
463 | case L2CAP_CID_LE_DATA: | |
8c3a4f00 | 464 | if (mtu < L2CAP_LE_MIN_MTU) |
682877c3 AG |
465 | return false; |
466 | break; | |
467 | ||
468 | default: | |
469 | if (mtu < L2CAP_DEFAULT_MIN_MTU) | |
470 | return false; | |
471 | } | |
472 | ||
473 | return true; | |
474 | } | |
475 | ||
2d792818 GP |
476 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, |
477 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
478 | { |
479 | struct sock *sk = sock->sk; | |
b4450035 | 480 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 GP |
481 | struct l2cap_options opts; |
482 | int len, err = 0; | |
483 | u32 opt; | |
484 | ||
485 | BT_DBG("sk %p", sk); | |
486 | ||
487 | lock_sock(sk); | |
488 | ||
489 | switch (optname) { | |
490 | case L2CAP_OPTIONS: | |
491 | if (sk->sk_state == BT_CONNECTED) { | |
492 | err = -EINVAL; | |
493 | break; | |
494 | } | |
495 | ||
0c1bc5c6 GP |
496 | opts.imtu = chan->imtu; |
497 | opts.omtu = chan->omtu; | |
498 | opts.flush_to = chan->flush_to; | |
499 | opts.mode = chan->mode; | |
47d1ec61 GP |
500 | opts.fcs = chan->fcs; |
501 | opts.max_tx = chan->max_tx; | |
6327eb98 | 502 | opts.txwin_size = chan->tx_win; |
33575df7 GP |
503 | |
504 | len = min_t(unsigned int, sizeof(opts), optlen); | |
505 | if (copy_from_user((char *) &opts, optval, len)) { | |
506 | err = -EFAULT; | |
507 | break; | |
508 | } | |
509 | ||
6327eb98 | 510 | if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) { |
33575df7 GP |
511 | err = -EINVAL; |
512 | break; | |
513 | } | |
514 | ||
682877c3 AG |
515 | if (!l2cap_valid_mtu(chan, opts.imtu)) { |
516 | err = -EINVAL; | |
517 | break; | |
518 | } | |
519 | ||
0c1bc5c6 GP |
520 | chan->mode = opts.mode; |
521 | switch (chan->mode) { | |
33575df7 | 522 | case L2CAP_MODE_BASIC: |
c1360a1c | 523 | clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
33575df7 GP |
524 | break; |
525 | case L2CAP_MODE_ERTM: | |
526 | case L2CAP_MODE_STREAMING: | |
527 | if (!disable_ertm) | |
528 | break; | |
529 | /* fall through */ | |
530 | default: | |
531 | err = -EINVAL; | |
532 | break; | |
533 | } | |
534 | ||
0c1bc5c6 GP |
535 | chan->imtu = opts.imtu; |
536 | chan->omtu = opts.omtu; | |
47d1ec61 GP |
537 | chan->fcs = opts.fcs; |
538 | chan->max_tx = opts.max_tx; | |
6327eb98 | 539 | chan->tx_win = opts.txwin_size; |
12d59781 | 540 | chan->flush_to = opts.flush_to; |
33575df7 GP |
541 | break; |
542 | ||
543 | case L2CAP_LM: | |
544 | if (get_user(opt, (u32 __user *) optval)) { | |
545 | err = -EFAULT; | |
546 | break; | |
547 | } | |
548 | ||
549 | if (opt & L2CAP_LM_AUTH) | |
4343478f | 550 | chan->sec_level = BT_SECURITY_LOW; |
33575df7 | 551 | if (opt & L2CAP_LM_ENCRYPT) |
4343478f | 552 | chan->sec_level = BT_SECURITY_MEDIUM; |
33575df7 | 553 | if (opt & L2CAP_LM_SECURE) |
4343478f | 554 | chan->sec_level = BT_SECURITY_HIGH; |
33575df7 | 555 | |
43bd0f32 AE |
556 | if (opt & L2CAP_LM_MASTER) |
557 | set_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
558 | else | |
559 | clear_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
ecf61bdb AE |
560 | |
561 | if (opt & L2CAP_LM_RELIABLE) | |
562 | set_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
563 | else | |
564 | clear_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
33575df7 GP |
565 | break; |
566 | ||
567 | default: | |
568 | err = -ENOPROTOOPT; | |
569 | break; | |
570 | } | |
571 | ||
572 | release_sock(sk); | |
573 | return err; | |
574 | } | |
575 | ||
2d792818 GP |
576 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, |
577 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
578 | { |
579 | struct sock *sk = sock->sk; | |
4343478f | 580 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 | 581 | struct bt_security sec; |
14b12d0b | 582 | struct bt_power pwr; |
f1cb9af5 | 583 | struct l2cap_conn *conn; |
33575df7 GP |
584 | int len, err = 0; |
585 | u32 opt; | |
586 | ||
587 | BT_DBG("sk %p", sk); | |
588 | ||
589 | if (level == SOL_L2CAP) | |
590 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
591 | ||
592 | if (level != SOL_BLUETOOTH) | |
593 | return -ENOPROTOOPT; | |
594 | ||
595 | lock_sock(sk); | |
596 | ||
597 | switch (optname) { | |
598 | case BT_SECURITY: | |
715ec005 | 599 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
2d792818 | 600 | chan->chan_type != L2CAP_CHAN_RAW) { |
33575df7 GP |
601 | err = -EINVAL; |
602 | break; | |
603 | } | |
604 | ||
605 | sec.level = BT_SECURITY_LOW; | |
606 | ||
607 | len = min_t(unsigned int, sizeof(sec), optlen); | |
608 | if (copy_from_user((char *) &sec, optval, len)) { | |
609 | err = -EFAULT; | |
610 | break; | |
611 | } | |
612 | ||
613 | if (sec.level < BT_SECURITY_LOW || | |
2d792818 | 614 | sec.level > BT_SECURITY_HIGH) { |
33575df7 GP |
615 | err = -EINVAL; |
616 | break; | |
617 | } | |
618 | ||
4343478f | 619 | chan->sec_level = sec.level; |
f1cb9af5 | 620 | |
0bee1d60 GP |
621 | if (!chan->conn) |
622 | break; | |
623 | ||
f1cb9af5 | 624 | conn = chan->conn; |
0bee1d60 GP |
625 | |
626 | /*change security for LE channels */ | |
627 | if (chan->scid == L2CAP_CID_LE_DATA) { | |
f1cb9af5 VCG |
628 | if (!conn->hcon->out) { |
629 | err = -EINVAL; | |
630 | break; | |
631 | } | |
632 | ||
cc110922 | 633 | if (smp_conn_security(conn->hcon, sec.level)) |
f1cb9af5 | 634 | break; |
f1cb9af5 | 635 | sk->sk_state = BT_CONFIG; |
3542b854 | 636 | chan->state = BT_CONFIG; |
0bee1d60 | 637 | |
a7d7723a GP |
638 | /* or for ACL link */ |
639 | } else if ((sk->sk_state == BT_CONNECT2 && | |
2d792818 | 640 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) || |
a7d7723a GP |
641 | sk->sk_state == BT_CONNECTED) { |
642 | if (!l2cap_chan_check_security(chan)) | |
c5daa683 | 643 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
a7d7723a GP |
644 | else |
645 | sk->sk_state_change(sk); | |
0bee1d60 GP |
646 | } else { |
647 | err = -EINVAL; | |
f1cb9af5 | 648 | } |
33575df7 GP |
649 | break; |
650 | ||
651 | case BT_DEFER_SETUP: | |
652 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
653 | err = -EINVAL; | |
654 | break; | |
655 | } | |
656 | ||
657 | if (get_user(opt, (u32 __user *) optval)) { | |
658 | err = -EFAULT; | |
659 | break; | |
660 | } | |
661 | ||
c5daa683 GP |
662 | if (opt) |
663 | set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); | |
664 | else | |
665 | clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); | |
33575df7 GP |
666 | break; |
667 | ||
668 | case BT_FLUSHABLE: | |
669 | if (get_user(opt, (u32 __user *) optval)) { | |
670 | err = -EFAULT; | |
671 | break; | |
672 | } | |
673 | ||
674 | if (opt > BT_FLUSHABLE_ON) { | |
675 | err = -EINVAL; | |
676 | break; | |
677 | } | |
678 | ||
679 | if (opt == BT_FLUSHABLE_OFF) { | |
8c1d787b | 680 | struct l2cap_conn *conn = chan->conn; |
25985edc | 681 | /* proceed further only when we have l2cap_conn and |
33575df7 GP |
682 | No Flush support in the LM */ |
683 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { | |
684 | err = -EINVAL; | |
685 | break; | |
686 | } | |
687 | } | |
688 | ||
d57b0e8b AE |
689 | if (opt) |
690 | set_bit(FLAG_FLUSHABLE, &chan->flags); | |
691 | else | |
692 | clear_bit(FLAG_FLUSHABLE, &chan->flags); | |
33575df7 GP |
693 | break; |
694 | ||
14b12d0b JG |
695 | case BT_POWER: |
696 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && | |
2d792818 | 697 | chan->chan_type != L2CAP_CHAN_RAW) { |
14b12d0b JG |
698 | err = -EINVAL; |
699 | break; | |
700 | } | |
701 | ||
702 | pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; | |
703 | ||
704 | len = min_t(unsigned int, sizeof(pwr), optlen); | |
705 | if (copy_from_user((char *) &pwr, optval, len)) { | |
706 | err = -EFAULT; | |
707 | break; | |
708 | } | |
15770b1a AE |
709 | |
710 | if (pwr.force_active) | |
711 | set_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
712 | else | |
713 | clear_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
14b12d0b JG |
714 | break; |
715 | ||
2ea66482 MM |
716 | case BT_CHANNEL_POLICY: |
717 | if (!enable_hs) { | |
718 | err = -ENOPROTOOPT; | |
719 | break; | |
720 | } | |
721 | ||
722 | if (get_user(opt, (u32 __user *) optval)) { | |
723 | err = -EFAULT; | |
724 | break; | |
725 | } | |
726 | ||
727 | if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) { | |
728 | err = -EINVAL; | |
729 | break; | |
730 | } | |
731 | ||
732 | if (chan->mode != L2CAP_MODE_ERTM && | |
2d792818 | 733 | chan->mode != L2CAP_MODE_STREAMING) { |
2ea66482 MM |
734 | err = -EOPNOTSUPP; |
735 | break; | |
736 | } | |
737 | ||
738 | chan->chan_policy = (u8) opt; | |
3f7a56c4 MM |
739 | |
740 | if (sk->sk_state == BT_CONNECTED && | |
741 | chan->move_role == L2CAP_MOVE_ROLE_NONE) | |
742 | l2cap_move_start(chan); | |
743 | ||
14b12d0b JG |
744 | break; |
745 | ||
33575df7 GP |
746 | default: |
747 | err = -ENOPROTOOPT; | |
748 | break; | |
749 | } | |
750 | ||
751 | release_sock(sk); | |
752 | return err; | |
753 | } | |
fd83ccdb | 754 | |
2d792818 GP |
755 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
756 | struct msghdr *msg, size_t len) | |
fd83ccdb GP |
757 | { |
758 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 759 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb GP |
760 | int err; |
761 | ||
762 | BT_DBG("sock %p, sk %p", sock, sk); | |
763 | ||
764 | err = sock_error(sk); | |
765 | if (err) | |
766 | return err; | |
767 | ||
768 | if (msg->msg_flags & MSG_OOB) | |
769 | return -EOPNOTSUPP; | |
770 | ||
a6a5568c | 771 | if (sk->sk_state != BT_CONNECTED) |
9a91a04a | 772 | return -ENOTCONN; |
fd83ccdb | 773 | |
a6a5568c | 774 | l2cap_chan_lock(chan); |
5e59b791 | 775 | err = l2cap_chan_send(chan, msg, len, sk->sk_priority); |
a6a5568c | 776 | l2cap_chan_unlock(chan); |
fd83ccdb | 777 | |
fd83ccdb GP |
778 | return err; |
779 | } | |
33575df7 | 780 | |
2d792818 GP |
781 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
782 | struct msghdr *msg, size_t len, int flags) | |
68983259 GP |
783 | { |
784 | struct sock *sk = sock->sk; | |
e328140f MM |
785 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
786 | int err; | |
68983259 GP |
787 | |
788 | lock_sock(sk); | |
789 | ||
c5daa683 GP |
790 | if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP, |
791 | &bt_sk(sk)->flags)) { | |
8c1d787b | 792 | sk->sk_state = BT_CONFIG; |
3542b854 | 793 | pi->chan->state = BT_CONFIG; |
8c1d787b | 794 | |
e328140f | 795 | __l2cap_connect_rsp_defer(pi->chan); |
68983259 GP |
796 | release_sock(sk); |
797 | return 0; | |
798 | } | |
799 | ||
800 | release_sock(sk); | |
801 | ||
802 | if (sock->type == SOCK_STREAM) | |
e328140f MM |
803 | err = bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); |
804 | else | |
805 | err = bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
806 | ||
807 | if (pi->chan->mode != L2CAP_MODE_ERTM) | |
808 | return err; | |
809 | ||
810 | /* Attempt to put pending rx data in the socket buffer */ | |
811 | ||
812 | lock_sock(sk); | |
813 | ||
814 | if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state)) | |
815 | goto done; | |
816 | ||
817 | if (pi->rx_busy_skb) { | |
818 | if (!sock_queue_rcv_skb(sk, pi->rx_busy_skb)) | |
819 | pi->rx_busy_skb = NULL; | |
820 | else | |
821 | goto done; | |
822 | } | |
823 | ||
824 | /* Restore data flow when half of the receive buffer is | |
825 | * available. This avoids resending large numbers of | |
826 | * frames. | |
827 | */ | |
828 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1) | |
829 | l2cap_chan_busy(pi->chan, 0); | |
68983259 | 830 | |
e328140f MM |
831 | done: |
832 | release_sock(sk); | |
833 | return err; | |
68983259 GP |
834 | } |
835 | ||
05fc1576 GP |
836 | /* Kill socket (only if zapped and orphan) |
837 | * Must be called on unlocked socket. | |
838 | */ | |
ba3bd0ee | 839 | static void l2cap_sock_kill(struct sock *sk) |
05fc1576 GP |
840 | { |
841 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
842 | return; | |
843 | ||
e05dcc32 | 844 | BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state)); |
05fc1576 GP |
845 | |
846 | /* Kill poor orphan */ | |
6ff5abbf | 847 | |
4af66c69 | 848 | l2cap_chan_put(l2cap_pi(sk)->chan); |
05fc1576 GP |
849 | sock_set_flag(sk, SOCK_DEAD); |
850 | sock_put(sk); | |
851 | } | |
852 | ||
dcba0dba GP |
853 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
854 | { | |
855 | struct sock *sk = sock->sk; | |
7ddb6e0f | 856 | struct l2cap_chan *chan; |
3df91ea2 | 857 | struct l2cap_conn *conn; |
dcba0dba GP |
858 | int err = 0; |
859 | ||
860 | BT_DBG("sock %p, sk %p", sock, sk); | |
861 | ||
862 | if (!sk) | |
863 | return 0; | |
864 | ||
7ddb6e0f | 865 | chan = l2cap_pi(sk)->chan; |
3df91ea2 AE |
866 | conn = chan->conn; |
867 | ||
868 | if (conn) | |
869 | mutex_lock(&conn->chan_lock); | |
7ddb6e0f | 870 | |
6be36555 | 871 | l2cap_chan_lock(chan); |
dcba0dba | 872 | lock_sock(sk); |
6be36555 | 873 | |
dcba0dba | 874 | if (!sk->sk_shutdown) { |
0c1bc5c6 | 875 | if (chan->mode == L2CAP_MODE_ERTM) |
dcba0dba GP |
876 | err = __l2cap_wait_ack(sk); |
877 | ||
878 | sk->sk_shutdown = SHUTDOWN_MASK; | |
3df91ea2 | 879 | |
6be36555 | 880 | release_sock(sk); |
0f852724 | 881 | l2cap_chan_close(chan, 0); |
6be36555 | 882 | lock_sock(sk); |
dcba0dba GP |
883 | |
884 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
885 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
2d792818 | 886 | sk->sk_lingertime); |
dcba0dba GP |
887 | } |
888 | ||
889 | if (!err && sk->sk_err) | |
890 | err = -sk->sk_err; | |
891 | ||
892 | release_sock(sk); | |
6be36555 | 893 | l2cap_chan_unlock(chan); |
3df91ea2 AE |
894 | |
895 | if (conn) | |
896 | mutex_unlock(&conn->chan_lock); | |
897 | ||
dcba0dba GP |
898 | return err; |
899 | } | |
900 | ||
554f05bb GP |
901 | static int l2cap_sock_release(struct socket *sock) |
902 | { | |
903 | struct sock *sk = sock->sk; | |
904 | int err; | |
905 | ||
906 | BT_DBG("sock %p, sk %p", sock, sk); | |
907 | ||
908 | if (!sk) | |
909 | return 0; | |
910 | ||
5b28d95c MY |
911 | bt_sock_unlink(&l2cap_sk_list, sk); |
912 | ||
554f05bb GP |
913 | err = l2cap_sock_shutdown(sock, 2); |
914 | ||
915 | sock_orphan(sk); | |
916 | l2cap_sock_kill(sk); | |
917 | return err; | |
918 | } | |
919 | ||
c0df7f6e AE |
920 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
921 | { | |
922 | struct sock *sk; | |
923 | ||
924 | BT_DBG("parent %p", parent); | |
925 | ||
926 | /* Close not yet accepted channels */ | |
927 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
928 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
929 | ||
930 | l2cap_chan_lock(chan); | |
931 | __clear_chan_timer(chan); | |
932 | l2cap_chan_close(chan, ECONNRESET); | |
933 | l2cap_chan_unlock(chan); | |
934 | ||
935 | l2cap_sock_kill(sk); | |
936 | } | |
937 | } | |
938 | ||
80b98027 | 939 | static struct l2cap_chan *l2cap_sock_new_connection_cb(struct l2cap_chan *chan) |
80808e43 | 940 | { |
80b98027 | 941 | struct sock *sk, *parent = chan->data; |
80808e43 | 942 | |
53826692 GP |
943 | /* Check for backlog size */ |
944 | if (sk_acceptq_is_full(parent)) { | |
945 | BT_DBG("backlog full %d", parent->sk_ack_backlog); | |
946 | return NULL; | |
947 | } | |
948 | ||
80808e43 | 949 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, |
2d792818 | 950 | GFP_ATOMIC); |
80808e43 GP |
951 | if (!sk) |
952 | return NULL; | |
953 | ||
d22015aa OP |
954 | bt_sock_reclassify_lock(sk, BTPROTO_L2CAP); |
955 | ||
80808e43 GP |
956 | l2cap_sock_init(sk, parent); |
957 | ||
644912e1 GP |
958 | bt_accept_enqueue(parent, sk); |
959 | ||
80808e43 GP |
960 | return l2cap_pi(sk)->chan; |
961 | } | |
962 | ||
80b98027 | 963 | static int l2cap_sock_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) |
23070494 | 964 | { |
e328140f | 965 | int err; |
80b98027 | 966 | struct sock *sk = chan->data; |
e328140f MM |
967 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
968 | ||
6be36555 AE |
969 | lock_sock(sk); |
970 | ||
971 | if (pi->rx_busy_skb) { | |
972 | err = -ENOMEM; | |
973 | goto done; | |
974 | } | |
e328140f MM |
975 | |
976 | err = sock_queue_rcv_skb(sk, skb); | |
977 | ||
978 | /* For ERTM, handle one skb that doesn't fit into the recv | |
979 | * buffer. This is important to do because the data frames | |
980 | * have already been acked, so the skb cannot be discarded. | |
981 | * | |
982 | * Notify the l2cap core that the buffer is full, so the | |
983 | * LOCAL_BUSY state is entered and no more frames are | |
984 | * acked and reassembled until there is buffer space | |
985 | * available. | |
986 | */ | |
987 | if (err < 0 && pi->chan->mode == L2CAP_MODE_ERTM) { | |
988 | pi->rx_busy_skb = skb; | |
989 | l2cap_chan_busy(pi->chan, 1); | |
990 | err = 0; | |
991 | } | |
23070494 | 992 | |
6be36555 AE |
993 | done: |
994 | release_sock(sk); | |
995 | ||
e328140f | 996 | return err; |
23070494 GP |
997 | } |
998 | ||
80b98027 | 999 | static void l2cap_sock_close_cb(struct l2cap_chan *chan) |
ba3bd0ee | 1000 | { |
80b98027 | 1001 | struct sock *sk = chan->data; |
ba3bd0ee GP |
1002 | |
1003 | l2cap_sock_kill(sk); | |
1004 | } | |
1005 | ||
c0df7f6e AE |
1006 | static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err) |
1007 | { | |
1008 | struct sock *sk = chan->data; | |
1009 | struct sock *parent; | |
1010 | ||
1011 | lock_sock(sk); | |
1012 | ||
1013 | parent = bt_sk(sk)->parent; | |
1014 | ||
1015 | sock_set_flag(sk, SOCK_ZAPPED); | |
1016 | ||
1017 | switch (chan->state) { | |
1018 | case BT_OPEN: | |
1019 | case BT_BOUND: | |
1020 | case BT_CLOSED: | |
1021 | break; | |
1022 | case BT_LISTEN: | |
1023 | l2cap_sock_cleanup_listen(sk); | |
1024 | sk->sk_state = BT_CLOSED; | |
1025 | chan->state = BT_CLOSED; | |
1026 | ||
1027 | break; | |
1028 | default: | |
1029 | sk->sk_state = BT_CLOSED; | |
1030 | chan->state = BT_CLOSED; | |
1031 | ||
1032 | sk->sk_err = err; | |
1033 | ||
1034 | if (parent) { | |
1035 | bt_accept_unlink(sk); | |
1036 | parent->sk_data_ready(parent, 0); | |
1037 | } else { | |
1038 | sk->sk_state_change(sk); | |
1039 | } | |
1040 | ||
1041 | break; | |
1042 | } | |
1043 | ||
1044 | release_sock(sk); | |
1045 | } | |
1046 | ||
80b98027 | 1047 | static void l2cap_sock_state_change_cb(struct l2cap_chan *chan, int state) |
89bc500e | 1048 | { |
80b98027 | 1049 | struct sock *sk = chan->data; |
89bc500e GP |
1050 | |
1051 | sk->sk_state = state; | |
1052 | } | |
1053 | ||
2f7719ce | 1054 | static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan, |
90338947 | 1055 | unsigned long len, int nb) |
2f7719ce | 1056 | { |
90338947 GP |
1057 | struct sk_buff *skb; |
1058 | int err; | |
1059 | ||
a6a5568c | 1060 | l2cap_chan_unlock(chan); |
90338947 | 1061 | skb = bt_skb_send_alloc(chan->sk, len, nb, &err); |
a6a5568c MM |
1062 | l2cap_chan_lock(chan); |
1063 | ||
90338947 GP |
1064 | if (!skb) |
1065 | return ERR_PTR(err); | |
2f7719ce | 1066 | |
90338947 | 1067 | return skb; |
2f7719ce AE |
1068 | } |
1069 | ||
54a59aa2 AE |
1070 | static void l2cap_sock_ready_cb(struct l2cap_chan *chan) |
1071 | { | |
1072 | struct sock *sk = chan->data; | |
1073 | struct sock *parent; | |
1074 | ||
1075 | lock_sock(sk); | |
1076 | ||
1077 | parent = bt_sk(sk)->parent; | |
1078 | ||
1079 | BT_DBG("sk %p, parent %p", sk, parent); | |
1080 | ||
1081 | sk->sk_state = BT_CONNECTED; | |
1082 | sk->sk_state_change(sk); | |
1083 | ||
1084 | if (parent) | |
1085 | parent->sk_data_ready(parent, 0); | |
1086 | ||
1087 | release_sock(sk); | |
1088 | } | |
1089 | ||
2dc4e510 GP |
1090 | static void l2cap_sock_defer_cb(struct l2cap_chan *chan) |
1091 | { | |
1092 | struct sock *sk = chan->data; | |
1093 | struct sock *parent = bt_sk(sk)->parent; | |
1094 | ||
1095 | if (parent) | |
1096 | parent->sk_data_ready(parent, 0); | |
1097 | } | |
1098 | ||
80808e43 GP |
1099 | static struct l2cap_ops l2cap_chan_ops = { |
1100 | .name = "L2CAP Socket Interface", | |
1101 | .new_connection = l2cap_sock_new_connection_cb, | |
23070494 | 1102 | .recv = l2cap_sock_recv_cb, |
ba3bd0ee | 1103 | .close = l2cap_sock_close_cb, |
c0df7f6e | 1104 | .teardown = l2cap_sock_teardown_cb, |
89bc500e | 1105 | .state_change = l2cap_sock_state_change_cb, |
54a59aa2 | 1106 | .ready = l2cap_sock_ready_cb, |
2dc4e510 | 1107 | .defer = l2cap_sock_defer_cb, |
2f7719ce | 1108 | .alloc_skb = l2cap_sock_alloc_skb_cb, |
80808e43 GP |
1109 | }; |
1110 | ||
bb58f747 GP |
1111 | static void l2cap_sock_destruct(struct sock *sk) |
1112 | { | |
1113 | BT_DBG("sk %p", sk); | |
1114 | ||
23d3a869 SL |
1115 | if (l2cap_pi(sk)->chan) |
1116 | l2cap_chan_put(l2cap_pi(sk)->chan); | |
e328140f MM |
1117 | if (l2cap_pi(sk)->rx_busy_skb) { |
1118 | kfree_skb(l2cap_pi(sk)->rx_busy_skb); | |
1119 | l2cap_pi(sk)->rx_busy_skb = NULL; | |
1120 | } | |
1121 | ||
bb58f747 GP |
1122 | skb_queue_purge(&sk->sk_receive_queue); |
1123 | skb_queue_purge(&sk->sk_write_queue); | |
1124 | } | |
1125 | ||
80808e43 | 1126 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747 GP |
1127 | { |
1128 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
b4450035 | 1129 | struct l2cap_chan *chan = pi->chan; |
bb58f747 GP |
1130 | |
1131 | BT_DBG("sk %p", sk); | |
1132 | ||
1133 | if (parent) { | |
b4450035 GP |
1134 | struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
1135 | ||
bb58f747 | 1136 | sk->sk_type = parent->sk_type; |
c5daa683 | 1137 | bt_sk(sk)->flags = bt_sk(parent)->flags; |
bb58f747 | 1138 | |
715ec005 | 1139 | chan->chan_type = pchan->chan_type; |
0c1bc5c6 GP |
1140 | chan->imtu = pchan->imtu; |
1141 | chan->omtu = pchan->omtu; | |
b4450035 | 1142 | chan->conf_state = pchan->conf_state; |
0c1bc5c6 | 1143 | chan->mode = pchan->mode; |
47d1ec61 GP |
1144 | chan->fcs = pchan->fcs; |
1145 | chan->max_tx = pchan->max_tx; | |
1146 | chan->tx_win = pchan->tx_win; | |
6b3c7104 | 1147 | chan->tx_win_max = pchan->tx_win_max; |
4343478f | 1148 | chan->sec_level = pchan->sec_level; |
d57b0e8b | 1149 | chan->flags = pchan->flags; |
6230c9b4 PM |
1150 | |
1151 | security_sk_clone(parent, sk); | |
bb58f747 | 1152 | } else { |
715ec005 GP |
1153 | |
1154 | switch (sk->sk_type) { | |
1155 | case SOCK_RAW: | |
1156 | chan->chan_type = L2CAP_CHAN_RAW; | |
1157 | break; | |
1158 | case SOCK_DGRAM: | |
1159 | chan->chan_type = L2CAP_CHAN_CONN_LESS; | |
1160 | break; | |
1161 | case SOCK_SEQPACKET: | |
1162 | case SOCK_STREAM: | |
1163 | chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; | |
1164 | break; | |
1165 | } | |
1166 | ||
0c1bc5c6 GP |
1167 | chan->imtu = L2CAP_DEFAULT_MTU; |
1168 | chan->omtu = 0; | |
bb58f747 | 1169 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c6 | 1170 | chan->mode = L2CAP_MODE_ERTM; |
c1360a1c | 1171 | set_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
bb58f747 | 1172 | } else { |
0c1bc5c6 | 1173 | chan->mode = L2CAP_MODE_BASIC; |
bb58f747 | 1174 | } |
bd4b1653 AE |
1175 | |
1176 | l2cap_chan_set_defaults(chan); | |
bb58f747 GP |
1177 | } |
1178 | ||
1179 | /* Default config options */ | |
0c1bc5c6 | 1180 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e43 GP |
1181 | |
1182 | chan->data = sk; | |
1183 | chan->ops = &l2cap_chan_ops; | |
bb58f747 GP |
1184 | } |
1185 | ||
1186 | static struct proto l2cap_proto = { | |
1187 | .name = "L2CAP", | |
1188 | .owner = THIS_MODULE, | |
1189 | .obj_size = sizeof(struct l2cap_pinfo) | |
1190 | }; | |
1191 | ||
2d792818 GP |
1192 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
1193 | int proto, gfp_t prio) | |
bb58f747 GP |
1194 | { |
1195 | struct sock *sk; | |
dc50a06d | 1196 | struct l2cap_chan *chan; |
bb58f747 GP |
1197 | |
1198 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); | |
1199 | if (!sk) | |
1200 | return NULL; | |
1201 | ||
1202 | sock_init_data(sock, sk); | |
1203 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
1204 | ||
1205 | sk->sk_destruct = l2cap_sock_destruct; | |
ba13ccd9 | 1206 | sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; |
bb58f747 GP |
1207 | |
1208 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1209 | ||
1210 | sk->sk_protocol = proto; | |
1211 | sk->sk_state = BT_OPEN; | |
1212 | ||
eef1d9b6 | 1213 | chan = l2cap_chan_create(); |
dc50a06d | 1214 | if (!chan) { |
49dfbb91 | 1215 | sk_free(sk); |
dc50a06d GP |
1216 | return NULL; |
1217 | } | |
1218 | ||
61d6ef3e MM |
1219 | l2cap_chan_hold(chan); |
1220 | ||
eef1d9b6 GP |
1221 | chan->sk = sk; |
1222 | ||
dc50a06d GP |
1223 | l2cap_pi(sk)->chan = chan; |
1224 | ||
bb58f747 GP |
1225 | return sk; |
1226 | } | |
1227 | ||
1228 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
1229 | int kern) | |
1230 | { | |
1231 | struct sock *sk; | |
1232 | ||
1233 | BT_DBG("sock %p", sock); | |
1234 | ||
1235 | sock->state = SS_UNCONNECTED; | |
1236 | ||
1237 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
2d792818 | 1238 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
bb58f747 GP |
1239 | return -ESOCKTNOSUPPORT; |
1240 | ||
1241 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
1242 | return -EPERM; | |
1243 | ||
1244 | sock->ops = &l2cap_sock_ops; | |
1245 | ||
1246 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); | |
1247 | if (!sk) | |
1248 | return -ENOMEM; | |
1249 | ||
1250 | l2cap_sock_init(sk, NULL); | |
5b28d95c | 1251 | bt_sock_link(&l2cap_sk_list, sk); |
bb58f747 GP |
1252 | return 0; |
1253 | } | |
1254 | ||
cf2f90f5 | 1255 | static const struct proto_ops l2cap_sock_ops = { |
65390587 GP |
1256 | .family = PF_BLUETOOTH, |
1257 | .owner = THIS_MODULE, | |
1258 | .release = l2cap_sock_release, | |
1259 | .bind = l2cap_sock_bind, | |
1260 | .connect = l2cap_sock_connect, | |
1261 | .listen = l2cap_sock_listen, | |
1262 | .accept = l2cap_sock_accept, | |
1263 | .getname = l2cap_sock_getname, | |
1264 | .sendmsg = l2cap_sock_sendmsg, | |
1265 | .recvmsg = l2cap_sock_recvmsg, | |
1266 | .poll = bt_sock_poll, | |
1267 | .ioctl = bt_sock_ioctl, | |
1268 | .mmap = sock_no_mmap, | |
1269 | .socketpair = sock_no_socketpair, | |
1270 | .shutdown = l2cap_sock_shutdown, | |
1271 | .setsockopt = l2cap_sock_setsockopt, | |
1272 | .getsockopt = l2cap_sock_getsockopt | |
1273 | }; | |
1274 | ||
bb58f747 GP |
1275 | static const struct net_proto_family l2cap_sock_family_ops = { |
1276 | .family = PF_BLUETOOTH, | |
1277 | .owner = THIS_MODULE, | |
1278 | .create = l2cap_sock_create, | |
1279 | }; | |
1280 | ||
1281 | int __init l2cap_init_sockets(void) | |
1282 | { | |
e2174ca4 | 1283 | int err; |
bb58f747 | 1284 | |
e2174ca4 GP |
1285 | err = proto_register(&l2cap_proto, 0); |
1286 | if (err < 0) | |
1287 | return err; | |
bb58f747 | 1288 | |
e2174ca4 | 1289 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
5b28d95c MY |
1290 | if (err < 0) { |
1291 | BT_ERR("L2CAP socket registration failed"); | |
e2174ca4 | 1292 | goto error; |
5b28d95c MY |
1293 | } |
1294 | ||
2d792818 GP |
1295 | err = bt_procfs_init(THIS_MODULE, &init_net, "l2cap", &l2cap_sk_list, |
1296 | NULL); | |
5b28d95c MY |
1297 | if (err < 0) { |
1298 | BT_ERR("Failed to create L2CAP proc file"); | |
1299 | bt_sock_unregister(BTPROTO_L2CAP); | |
1300 | goto error; | |
1301 | } | |
bb58f747 | 1302 | |
e2174ca4 | 1303 | BT_INFO("L2CAP socket layer initialized"); |
bb58f747 | 1304 | |
e2174ca4 | 1305 | return 0; |
bb58f747 GP |
1306 | |
1307 | error: | |
e2174ca4 GP |
1308 | proto_unregister(&l2cap_proto); |
1309 | return err; | |
bb58f747 GP |
1310 | } |
1311 | ||
1312 | void l2cap_cleanup_sockets(void) | |
1313 | { | |
5b28d95c | 1314 | bt_procfs_cleanup(&init_net, "l2cap"); |
e2174ca4 GP |
1315 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) |
1316 | BT_ERR("L2CAP socket unregistration failed"); | |
bb58f747 | 1317 | |
e2174ca4 | 1318 | proto_unregister(&l2cap_proto); |
bb58f747 | 1319 | } |