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Commit | Line | Data |
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bb58f747 GP |
1 | /* |
2 | BlueZ - Bluetooth protocol stack for Linux | |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> | |
5 | Copyright (C) 2010 Google Inc. | |
590051de | 6 | Copyright (C) 2011 ProFUSION Embedded Systems |
bb58f747 GP |
7 | |
8 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License version 2 as | |
12 | published by the Free Software Foundation; | |
13 | ||
14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
15 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
17 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
18 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES | |
19 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
20 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
21 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
22 | ||
23 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, | |
24 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
25 | SOFTWARE IS DISCLAIMED. | |
26 | */ | |
27 | ||
28 | /* Bluetooth L2CAP sockets. */ | |
29 | ||
bc3b2d7f | 30 | #include <linux/export.h> |
6230c9b4 | 31 | |
bb58f747 | 32 | #include <net/bluetooth/bluetooth.h> |
33575df7 | 33 | #include <net/bluetooth/hci_core.h> |
bb58f747 | 34 | #include <net/bluetooth/l2cap.h> |
ac4b7236 MH |
35 | |
36 | #include "smp.h" | |
bb58f747 | 37 | |
5b28d95c MY |
38 | static struct bt_sock_list l2cap_sk_list = { |
39 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) | |
40 | }; | |
41 | ||
cf2f90f5 | 42 | static const struct proto_ops l2cap_sock_ops; |
80808e43 | 43 | static void l2cap_sock_init(struct sock *sk, struct sock *parent); |
2d792818 GP |
44 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
45 | int proto, gfp_t prio); | |
cf2f90f5 | 46 | |
b3916db3 DH |
47 | bool l2cap_is_socket(struct socket *sock) |
48 | { | |
49 | return sock && sock->ops == &l2cap_sock_ops; | |
50 | } | |
51 | EXPORT_SYMBOL(l2cap_is_socket); | |
52 | ||
af6bcd82 GP |
53 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
54 | { | |
55 | struct sock *sk = sock->sk; | |
4343478f | 56 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
57 | struct sockaddr_l2 la; |
58 | int len, err = 0; | |
59 | ||
60 | BT_DBG("sk %p", sk); | |
61 | ||
62 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
63 | return -EINVAL; | |
64 | ||
65 | memset(&la, 0, sizeof(la)); | |
66 | len = min_t(unsigned int, sizeof(la), alen); | |
67 | memcpy(&la, addr, len); | |
68 | ||
b62f328b | 69 | if (la.l2_cid && la.l2_psm) |
af6bcd82 GP |
70 | return -EINVAL; |
71 | ||
72 | lock_sock(sk); | |
73 | ||
74 | if (sk->sk_state != BT_OPEN) { | |
75 | err = -EBADFD; | |
76 | goto done; | |
77 | } | |
78 | ||
79 | if (la.l2_psm) { | |
80 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
81 | ||
82 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
83 | if ((psm & 0x0101) != 0x0001) { | |
84 | err = -EINVAL; | |
85 | goto done; | |
86 | } | |
87 | ||
88 | /* Restrict usage of well-known PSMs */ | |
89 | if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { | |
90 | err = -EACCES; | |
91 | goto done; | |
92 | } | |
93 | } | |
94 | ||
9e4425ff | 95 | if (la.l2_cid) |
6e4aff10 | 96 | err = l2cap_add_scid(chan, __le16_to_cpu(la.l2_cid)); |
9e4425ff GP |
97 | else |
98 | err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm); | |
af6bcd82 | 99 | |
9e4425ff GP |
100 | if (err < 0) |
101 | goto done; | |
af6bcd82 | 102 | |
6a974b50 | 103 | switch (chan->chan_type) { |
3124b843 MH |
104 | case L2CAP_CHAN_CONN_LESS: |
105 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_3DSP) | |
106 | chan->sec_level = BT_SECURITY_SDP; | |
107 | break; | |
6a974b50 MH |
108 | case L2CAP_CHAN_CONN_ORIENTED: |
109 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_SDP || | |
110 | __le16_to_cpu(la.l2_psm) == L2CAP_PSM_RFCOMM) | |
111 | chan->sec_level = BT_SECURITY_SDP; | |
112 | break; | |
113 | } | |
b62f328b | 114 | |
7eafc59e | 115 | bacpy(&chan->src, &la.l2_bdaddr); |
4f1654e0 | 116 | chan->src_type = la.l2_bdaddr_type; |
89bc500e GP |
117 | |
118 | chan->state = BT_BOUND; | |
9e4425ff | 119 | sk->sk_state = BT_BOUND; |
af6bcd82 GP |
120 | |
121 | done: | |
122 | release_sock(sk); | |
123 | return err; | |
124 | } | |
125 | ||
2d792818 GP |
126 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, |
127 | int alen, int flags) | |
4e34c50b GP |
128 | { |
129 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 130 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
4e34c50b GP |
131 | struct sockaddr_l2 la; |
132 | int len, err = 0; | |
133 | ||
134 | BT_DBG("sk %p", sk); | |
135 | ||
136 | if (!addr || alen < sizeof(addr->sa_family) || | |
137 | addr->sa_family != AF_BLUETOOTH) | |
138 | return -EINVAL; | |
139 | ||
140 | memset(&la, 0, sizeof(la)); | |
141 | len = min_t(unsigned int, sizeof(la), alen); | |
142 | memcpy(&la, addr, len); | |
143 | ||
acd7d370 | 144 | if (la.l2_cid && la.l2_psm) |
4e34c50b GP |
145 | return -EINVAL; |
146 | ||
6e4aff10 | 147 | err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid), |
8e9f9892 | 148 | &la.l2_bdaddr, la.l2_bdaddr_type); |
4e34c50b | 149 | if (err) |
b3fb611e | 150 | return err; |
4e34c50b | 151 | |
6be36555 AE |
152 | lock_sock(sk); |
153 | ||
4e34c50b | 154 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
2d792818 | 155 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
b3fb611e AE |
156 | |
157 | release_sock(sk); | |
158 | ||
4e34c50b GP |
159 | return err; |
160 | } | |
161 | ||
af6bcd82 GP |
162 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
163 | { | |
164 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 165 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
166 | int err = 0; |
167 | ||
168 | BT_DBG("sk %p backlog %d", sk, backlog); | |
169 | ||
170 | lock_sock(sk); | |
171 | ||
6b3af733 | 172 | if (sk->sk_state != BT_BOUND) { |
af6bcd82 GP |
173 | err = -EBADFD; |
174 | goto done; | |
175 | } | |
176 | ||
6b3af733 MH |
177 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) { |
178 | err = -EINVAL; | |
179 | goto done; | |
180 | } | |
181 | ||
0c1bc5c6 | 182 | switch (chan->mode) { |
af6bcd82 GP |
183 | case L2CAP_MODE_BASIC: |
184 | break; | |
185 | case L2CAP_MODE_ERTM: | |
186 | case L2CAP_MODE_STREAMING: | |
187 | if (!disable_ertm) | |
188 | break; | |
189 | /* fall through */ | |
190 | default: | |
191 | err = -ENOTSUPP; | |
192 | goto done; | |
193 | } | |
194 | ||
af6bcd82 GP |
195 | sk->sk_max_ack_backlog = backlog; |
196 | sk->sk_ack_backlog = 0; | |
89bc500e GP |
197 | |
198 | chan->state = BT_LISTEN; | |
af6bcd82 GP |
199 | sk->sk_state = BT_LISTEN; |
200 | ||
201 | done: | |
202 | release_sock(sk); | |
203 | return err; | |
204 | } | |
205 | ||
2d792818 GP |
206 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, |
207 | int flags) | |
c47b7c72 GP |
208 | { |
209 | DECLARE_WAITQUEUE(wait, current); | |
210 | struct sock *sk = sock->sk, *nsk; | |
211 | long timeo; | |
212 | int err = 0; | |
213 | ||
214 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
215 | ||
c47b7c72 GP |
216 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
217 | ||
218 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
219 | ||
220 | /* Wait for an incoming connection. (wake-one). */ | |
221 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
f9a3c20a | 222 | while (1) { |
c47b7c72 | 223 | set_current_state(TASK_INTERRUPTIBLE); |
f9a3c20a PH |
224 | |
225 | if (sk->sk_state != BT_LISTEN) { | |
226 | err = -EBADFD; | |
c47b7c72 GP |
227 | break; |
228 | } | |
229 | ||
f9a3c20a PH |
230 | nsk = bt_accept_dequeue(sk, newsock); |
231 | if (nsk) | |
232 | break; | |
c47b7c72 | 233 | |
f9a3c20a PH |
234 | if (!timeo) { |
235 | err = -EAGAIN; | |
c47b7c72 GP |
236 | break; |
237 | } | |
238 | ||
239 | if (signal_pending(current)) { | |
240 | err = sock_intr_errno(timeo); | |
241 | break; | |
242 | } | |
f9a3c20a PH |
243 | |
244 | release_sock(sk); | |
245 | timeo = schedule_timeout(timeo); | |
246 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
c47b7c72 | 247 | } |
f9a3c20a | 248 | __set_current_state(TASK_RUNNING); |
c47b7c72 GP |
249 | remove_wait_queue(sk_sleep(sk), &wait); |
250 | ||
251 | if (err) | |
252 | goto done; | |
253 | ||
254 | newsock->state = SS_CONNECTED; | |
255 | ||
256 | BT_DBG("new socket %p", nsk); | |
257 | ||
258 | done: | |
259 | release_sock(sk); | |
260 | return err; | |
261 | } | |
262 | ||
2d792818 GP |
263 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, |
264 | int *len, int peer) | |
d7175d55 GP |
265 | { |
266 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
267 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 268 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
d7175d55 GP |
269 | |
270 | BT_DBG("sock %p, sk %p", sock, sk); | |
271 | ||
792039c7 | 272 | memset(la, 0, sizeof(struct sockaddr_l2)); |
d7175d55 GP |
273 | addr->sa_family = AF_BLUETOOTH; |
274 | *len = sizeof(struct sockaddr_l2); | |
275 | ||
276 | if (peer) { | |
fe4128e0 | 277 | la->l2_psm = chan->psm; |
7eafc59e | 278 | bacpy(&la->l2_bdaddr, &chan->dst); |
fe4128e0 | 279 | la->l2_cid = cpu_to_le16(chan->dcid); |
4f1654e0 | 280 | la->l2_bdaddr_type = chan->dst_type; |
d7175d55 | 281 | } else { |
0c1bc5c6 | 282 | la->l2_psm = chan->sport; |
7eafc59e | 283 | bacpy(&la->l2_bdaddr, &chan->src); |
fe4128e0 | 284 | la->l2_cid = cpu_to_le16(chan->scid); |
4f1654e0 | 285 | la->l2_bdaddr_type = chan->src_type; |
d7175d55 GP |
286 | } |
287 | ||
288 | return 0; | |
289 | } | |
290 | ||
2d792818 GP |
291 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, |
292 | char __user *optval, int __user *optlen) | |
99f4808d GP |
293 | { |
294 | struct sock *sk = sock->sk; | |
4343478f | 295 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d GP |
296 | struct l2cap_options opts; |
297 | struct l2cap_conninfo cinfo; | |
298 | int len, err = 0; | |
299 | u32 opt; | |
300 | ||
301 | BT_DBG("sk %p", sk); | |
302 | ||
303 | if (get_user(len, optlen)) | |
304 | return -EFAULT; | |
305 | ||
306 | lock_sock(sk); | |
307 | ||
308 | switch (optname) { | |
309 | case L2CAP_OPTIONS: | |
e3fb592b | 310 | memset(&opts, 0, sizeof(opts)); |
0c1bc5c6 GP |
311 | opts.imtu = chan->imtu; |
312 | opts.omtu = chan->omtu; | |
313 | opts.flush_to = chan->flush_to; | |
314 | opts.mode = chan->mode; | |
47d1ec61 GP |
315 | opts.fcs = chan->fcs; |
316 | opts.max_tx = chan->max_tx; | |
6327eb98 | 317 | opts.txwin_size = chan->tx_win; |
99f4808d GP |
318 | |
319 | len = min_t(unsigned int, len, sizeof(opts)); | |
320 | if (copy_to_user(optval, (char *) &opts, len)) | |
321 | err = -EFAULT; | |
322 | ||
323 | break; | |
324 | ||
325 | case L2CAP_LM: | |
4343478f | 326 | switch (chan->sec_level) { |
99f4808d GP |
327 | case BT_SECURITY_LOW: |
328 | opt = L2CAP_LM_AUTH; | |
329 | break; | |
330 | case BT_SECURITY_MEDIUM: | |
331 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
332 | break; | |
333 | case BT_SECURITY_HIGH: | |
334 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
2d792818 | 335 | L2CAP_LM_SECURE; |
99f4808d GP |
336 | break; |
337 | default: | |
338 | opt = 0; | |
339 | break; | |
340 | } | |
341 | ||
43bd0f32 | 342 | if (test_bit(FLAG_ROLE_SWITCH, &chan->flags)) |
99f4808d GP |
343 | opt |= L2CAP_LM_MASTER; |
344 | ||
ecf61bdb | 345 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
99f4808d GP |
346 | opt |= L2CAP_LM_RELIABLE; |
347 | ||
348 | if (put_user(opt, (u32 __user *) optval)) | |
349 | err = -EFAULT; | |
350 | break; | |
351 | ||
352 | case L2CAP_CONNINFO: | |
353 | if (sk->sk_state != BT_CONNECTED && | |
c5daa683 GP |
354 | !(sk->sk_state == BT_CONNECT2 && |
355 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { | |
99f4808d GP |
356 | err = -ENOTCONN; |
357 | break; | |
358 | } | |
359 | ||
8d03e971 | 360 | memset(&cinfo, 0, sizeof(cinfo)); |
8c1d787b GP |
361 | cinfo.hci_handle = chan->conn->hcon->handle; |
362 | memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); | |
99f4808d GP |
363 | |
364 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
365 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
366 | err = -EFAULT; | |
367 | ||
368 | break; | |
369 | ||
370 | default: | |
371 | err = -ENOPROTOOPT; | |
372 | break; | |
373 | } | |
374 | ||
375 | release_sock(sk); | |
376 | return err; | |
377 | } | |
378 | ||
2d792818 GP |
379 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, |
380 | char __user *optval, int __user *optlen) | |
99f4808d GP |
381 | { |
382 | struct sock *sk = sock->sk; | |
4343478f | 383 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d | 384 | struct bt_security sec; |
14b12d0b | 385 | struct bt_power pwr; |
99f4808d GP |
386 | int len, err = 0; |
387 | ||
388 | BT_DBG("sk %p", sk); | |
389 | ||
390 | if (level == SOL_L2CAP) | |
391 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
392 | ||
393 | if (level != SOL_BLUETOOTH) | |
394 | return -ENOPROTOOPT; | |
395 | ||
396 | if (get_user(len, optlen)) | |
397 | return -EFAULT; | |
398 | ||
399 | lock_sock(sk); | |
400 | ||
401 | switch (optname) { | |
402 | case BT_SECURITY: | |
715ec005 | 403 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
2d792818 | 404 | chan->chan_type != L2CAP_CHAN_RAW) { |
99f4808d GP |
405 | err = -EINVAL; |
406 | break; | |
407 | } | |
408 | ||
8f360119 | 409 | memset(&sec, 0, sizeof(sec)); |
85e34368 | 410 | if (chan->conn) { |
c6585a4d | 411 | sec.level = chan->conn->hcon->sec_level; |
99f4808d | 412 | |
85e34368 AE |
413 | if (sk->sk_state == BT_CONNECTED) |
414 | sec.key_size = chan->conn->hcon->enc_key_size; | |
415 | } else { | |
416 | sec.level = chan->sec_level; | |
417 | } | |
8f360119 | 418 | |
99f4808d GP |
419 | len = min_t(unsigned int, len, sizeof(sec)); |
420 | if (copy_to_user(optval, (char *) &sec, len)) | |
421 | err = -EFAULT; | |
422 | ||
423 | break; | |
424 | ||
425 | case BT_DEFER_SETUP: | |
426 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
427 | err = -EINVAL; | |
428 | break; | |
429 | } | |
430 | ||
c5daa683 GP |
431 | if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), |
432 | (u32 __user *) optval)) | |
99f4808d GP |
433 | err = -EFAULT; |
434 | ||
435 | break; | |
436 | ||
437 | case BT_FLUSHABLE: | |
d57b0e8b | 438 | if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags), |
2d792818 | 439 | (u32 __user *) optval)) |
99f4808d GP |
440 | err = -EFAULT; |
441 | ||
442 | break; | |
443 | ||
14b12d0b JG |
444 | case BT_POWER: |
445 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
2d792818 | 446 | && sk->sk_type != SOCK_RAW) { |
14b12d0b JG |
447 | err = -EINVAL; |
448 | break; | |
449 | } | |
450 | ||
15770b1a | 451 | pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
14b12d0b JG |
452 | |
453 | len = min_t(unsigned int, len, sizeof(pwr)); | |
454 | if (copy_to_user(optval, (char *) &pwr, len)) | |
455 | err = -EFAULT; | |
456 | ||
457 | break; | |
458 | ||
2ea66482 | 459 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
460 | if (put_user(chan->chan_policy, (u32 __user *) optval)) |
461 | err = -EFAULT; | |
462 | break; | |
463 | ||
99f4808d GP |
464 | default: |
465 | err = -ENOPROTOOPT; | |
466 | break; | |
467 | } | |
468 | ||
469 | release_sock(sk); | |
470 | return err; | |
471 | } | |
472 | ||
682877c3 AG |
473 | static bool l2cap_valid_mtu(struct l2cap_chan *chan, u16 mtu) |
474 | { | |
475 | switch (chan->scid) { | |
073d1cf3 | 476 | case L2CAP_CID_ATT: |
8c3a4f00 | 477 | if (mtu < L2CAP_LE_MIN_MTU) |
682877c3 AG |
478 | return false; |
479 | break; | |
480 | ||
481 | default: | |
482 | if (mtu < L2CAP_DEFAULT_MIN_MTU) | |
483 | return false; | |
484 | } | |
485 | ||
486 | return true; | |
487 | } | |
488 | ||
2d792818 GP |
489 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, |
490 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
491 | { |
492 | struct sock *sk = sock->sk; | |
b4450035 | 493 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 GP |
494 | struct l2cap_options opts; |
495 | int len, err = 0; | |
496 | u32 opt; | |
497 | ||
498 | BT_DBG("sk %p", sk); | |
499 | ||
500 | lock_sock(sk); | |
501 | ||
502 | switch (optname) { | |
503 | case L2CAP_OPTIONS: | |
504 | if (sk->sk_state == BT_CONNECTED) { | |
505 | err = -EINVAL; | |
506 | break; | |
507 | } | |
508 | ||
0c1bc5c6 GP |
509 | opts.imtu = chan->imtu; |
510 | opts.omtu = chan->omtu; | |
511 | opts.flush_to = chan->flush_to; | |
512 | opts.mode = chan->mode; | |
47d1ec61 GP |
513 | opts.fcs = chan->fcs; |
514 | opts.max_tx = chan->max_tx; | |
6327eb98 | 515 | opts.txwin_size = chan->tx_win; |
33575df7 GP |
516 | |
517 | len = min_t(unsigned int, sizeof(opts), optlen); | |
518 | if (copy_from_user((char *) &opts, optval, len)) { | |
519 | err = -EFAULT; | |
520 | break; | |
521 | } | |
522 | ||
6327eb98 | 523 | if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) { |
33575df7 GP |
524 | err = -EINVAL; |
525 | break; | |
526 | } | |
527 | ||
682877c3 AG |
528 | if (!l2cap_valid_mtu(chan, opts.imtu)) { |
529 | err = -EINVAL; | |
530 | break; | |
531 | } | |
532 | ||
0c1bc5c6 GP |
533 | chan->mode = opts.mode; |
534 | switch (chan->mode) { | |
33575df7 | 535 | case L2CAP_MODE_BASIC: |
c1360a1c | 536 | clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
33575df7 GP |
537 | break; |
538 | case L2CAP_MODE_ERTM: | |
539 | case L2CAP_MODE_STREAMING: | |
540 | if (!disable_ertm) | |
541 | break; | |
542 | /* fall through */ | |
543 | default: | |
544 | err = -EINVAL; | |
545 | break; | |
546 | } | |
547 | ||
0c1bc5c6 GP |
548 | chan->imtu = opts.imtu; |
549 | chan->omtu = opts.omtu; | |
47d1ec61 GP |
550 | chan->fcs = opts.fcs; |
551 | chan->max_tx = opts.max_tx; | |
6327eb98 | 552 | chan->tx_win = opts.txwin_size; |
12d59781 | 553 | chan->flush_to = opts.flush_to; |
33575df7 GP |
554 | break; |
555 | ||
556 | case L2CAP_LM: | |
557 | if (get_user(opt, (u32 __user *) optval)) { | |
558 | err = -EFAULT; | |
559 | break; | |
560 | } | |
561 | ||
562 | if (opt & L2CAP_LM_AUTH) | |
4343478f | 563 | chan->sec_level = BT_SECURITY_LOW; |
33575df7 | 564 | if (opt & L2CAP_LM_ENCRYPT) |
4343478f | 565 | chan->sec_level = BT_SECURITY_MEDIUM; |
33575df7 | 566 | if (opt & L2CAP_LM_SECURE) |
4343478f | 567 | chan->sec_level = BT_SECURITY_HIGH; |
33575df7 | 568 | |
43bd0f32 AE |
569 | if (opt & L2CAP_LM_MASTER) |
570 | set_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
571 | else | |
572 | clear_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
ecf61bdb AE |
573 | |
574 | if (opt & L2CAP_LM_RELIABLE) | |
575 | set_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
576 | else | |
577 | clear_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
33575df7 GP |
578 | break; |
579 | ||
580 | default: | |
581 | err = -ENOPROTOOPT; | |
582 | break; | |
583 | } | |
584 | ||
585 | release_sock(sk); | |
586 | return err; | |
587 | } | |
588 | ||
2d792818 GP |
589 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, |
590 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
591 | { |
592 | struct sock *sk = sock->sk; | |
4343478f | 593 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 | 594 | struct bt_security sec; |
14b12d0b | 595 | struct bt_power pwr; |
f1cb9af5 | 596 | struct l2cap_conn *conn; |
33575df7 GP |
597 | int len, err = 0; |
598 | u32 opt; | |
599 | ||
600 | BT_DBG("sk %p", sk); | |
601 | ||
602 | if (level == SOL_L2CAP) | |
603 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
604 | ||
605 | if (level != SOL_BLUETOOTH) | |
606 | return -ENOPROTOOPT; | |
607 | ||
608 | lock_sock(sk); | |
609 | ||
610 | switch (optname) { | |
611 | case BT_SECURITY: | |
715ec005 | 612 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
2d792818 | 613 | chan->chan_type != L2CAP_CHAN_RAW) { |
33575df7 GP |
614 | err = -EINVAL; |
615 | break; | |
616 | } | |
617 | ||
618 | sec.level = BT_SECURITY_LOW; | |
619 | ||
620 | len = min_t(unsigned int, sizeof(sec), optlen); | |
621 | if (copy_from_user((char *) &sec, optval, len)) { | |
622 | err = -EFAULT; | |
623 | break; | |
624 | } | |
625 | ||
626 | if (sec.level < BT_SECURITY_LOW || | |
2d792818 | 627 | sec.level > BT_SECURITY_HIGH) { |
33575df7 GP |
628 | err = -EINVAL; |
629 | break; | |
630 | } | |
631 | ||
4343478f | 632 | chan->sec_level = sec.level; |
f1cb9af5 | 633 | |
0bee1d60 GP |
634 | if (!chan->conn) |
635 | break; | |
636 | ||
f1cb9af5 | 637 | conn = chan->conn; |
0bee1d60 GP |
638 | |
639 | /*change security for LE channels */ | |
073d1cf3 | 640 | if (chan->scid == L2CAP_CID_ATT) { |
f1cb9af5 VCG |
641 | if (!conn->hcon->out) { |
642 | err = -EINVAL; | |
643 | break; | |
644 | } | |
645 | ||
cc110922 | 646 | if (smp_conn_security(conn->hcon, sec.level)) |
f1cb9af5 | 647 | break; |
f1cb9af5 | 648 | sk->sk_state = BT_CONFIG; |
3542b854 | 649 | chan->state = BT_CONFIG; |
0bee1d60 | 650 | |
a7d7723a GP |
651 | /* or for ACL link */ |
652 | } else if ((sk->sk_state == BT_CONNECT2 && | |
2d792818 | 653 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) || |
a7d7723a GP |
654 | sk->sk_state == BT_CONNECTED) { |
655 | if (!l2cap_chan_check_security(chan)) | |
c5daa683 | 656 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
a7d7723a GP |
657 | else |
658 | sk->sk_state_change(sk); | |
0bee1d60 GP |
659 | } else { |
660 | err = -EINVAL; | |
f1cb9af5 | 661 | } |
33575df7 GP |
662 | break; |
663 | ||
664 | case BT_DEFER_SETUP: | |
665 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
666 | err = -EINVAL; | |
667 | break; | |
668 | } | |
669 | ||
670 | if (get_user(opt, (u32 __user *) optval)) { | |
671 | err = -EFAULT; | |
672 | break; | |
673 | } | |
674 | ||
c5daa683 GP |
675 | if (opt) |
676 | set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); | |
677 | else | |
678 | clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); | |
33575df7 GP |
679 | break; |
680 | ||
681 | case BT_FLUSHABLE: | |
682 | if (get_user(opt, (u32 __user *) optval)) { | |
683 | err = -EFAULT; | |
684 | break; | |
685 | } | |
686 | ||
687 | if (opt > BT_FLUSHABLE_ON) { | |
688 | err = -EINVAL; | |
689 | break; | |
690 | } | |
691 | ||
692 | if (opt == BT_FLUSHABLE_OFF) { | |
c1f23a2b | 693 | conn = chan->conn; |
25985edc | 694 | /* proceed further only when we have l2cap_conn and |
33575df7 GP |
695 | No Flush support in the LM */ |
696 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { | |
697 | err = -EINVAL; | |
698 | break; | |
699 | } | |
700 | } | |
701 | ||
d57b0e8b AE |
702 | if (opt) |
703 | set_bit(FLAG_FLUSHABLE, &chan->flags); | |
704 | else | |
705 | clear_bit(FLAG_FLUSHABLE, &chan->flags); | |
33575df7 GP |
706 | break; |
707 | ||
14b12d0b JG |
708 | case BT_POWER: |
709 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && | |
2d792818 | 710 | chan->chan_type != L2CAP_CHAN_RAW) { |
14b12d0b JG |
711 | err = -EINVAL; |
712 | break; | |
713 | } | |
714 | ||
715 | pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; | |
716 | ||
717 | len = min_t(unsigned int, sizeof(pwr), optlen); | |
718 | if (copy_from_user((char *) &pwr, optval, len)) { | |
719 | err = -EFAULT; | |
720 | break; | |
721 | } | |
15770b1a AE |
722 | |
723 | if (pwr.force_active) | |
724 | set_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
725 | else | |
726 | clear_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
14b12d0b JG |
727 | break; |
728 | ||
2ea66482 | 729 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
730 | if (get_user(opt, (u32 __user *) optval)) { |
731 | err = -EFAULT; | |
732 | break; | |
733 | } | |
734 | ||
735 | if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) { | |
736 | err = -EINVAL; | |
737 | break; | |
738 | } | |
739 | ||
740 | if (chan->mode != L2CAP_MODE_ERTM && | |
2d792818 | 741 | chan->mode != L2CAP_MODE_STREAMING) { |
2ea66482 MM |
742 | err = -EOPNOTSUPP; |
743 | break; | |
744 | } | |
745 | ||
746 | chan->chan_policy = (u8) opt; | |
3f7a56c4 MM |
747 | |
748 | if (sk->sk_state == BT_CONNECTED && | |
749 | chan->move_role == L2CAP_MOVE_ROLE_NONE) | |
750 | l2cap_move_start(chan); | |
751 | ||
14b12d0b JG |
752 | break; |
753 | ||
33575df7 GP |
754 | default: |
755 | err = -ENOPROTOOPT; | |
756 | break; | |
757 | } | |
758 | ||
759 | release_sock(sk); | |
760 | return err; | |
761 | } | |
fd83ccdb | 762 | |
2d792818 GP |
763 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
764 | struct msghdr *msg, size_t len) | |
fd83ccdb GP |
765 | { |
766 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 767 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb GP |
768 | int err; |
769 | ||
770 | BT_DBG("sock %p, sk %p", sock, sk); | |
771 | ||
772 | err = sock_error(sk); | |
773 | if (err) | |
774 | return err; | |
775 | ||
776 | if (msg->msg_flags & MSG_OOB) | |
777 | return -EOPNOTSUPP; | |
778 | ||
a6a5568c | 779 | if (sk->sk_state != BT_CONNECTED) |
9a91a04a | 780 | return -ENOTCONN; |
fd83ccdb | 781 | |
e793dcf0 JH |
782 | lock_sock(sk); |
783 | err = bt_sock_wait_ready(sk, msg->msg_flags); | |
784 | release_sock(sk); | |
785 | if (err) | |
786 | return err; | |
787 | ||
a6a5568c | 788 | l2cap_chan_lock(chan); |
5e59b791 | 789 | err = l2cap_chan_send(chan, msg, len, sk->sk_priority); |
a6a5568c | 790 | l2cap_chan_unlock(chan); |
fd83ccdb | 791 | |
fd83ccdb GP |
792 | return err; |
793 | } | |
33575df7 | 794 | |
2d792818 GP |
795 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
796 | struct msghdr *msg, size_t len, int flags) | |
68983259 GP |
797 | { |
798 | struct sock *sk = sock->sk; | |
e328140f MM |
799 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
800 | int err; | |
68983259 GP |
801 | |
802 | lock_sock(sk); | |
803 | ||
c5daa683 GP |
804 | if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP, |
805 | &bt_sk(sk)->flags)) { | |
8c1d787b | 806 | sk->sk_state = BT_CONFIG; |
3542b854 | 807 | pi->chan->state = BT_CONFIG; |
8c1d787b | 808 | |
e328140f | 809 | __l2cap_connect_rsp_defer(pi->chan); |
970871bc JH |
810 | err = 0; |
811 | goto done; | |
68983259 GP |
812 | } |
813 | ||
814 | release_sock(sk); | |
815 | ||
816 | if (sock->type == SOCK_STREAM) | |
e328140f MM |
817 | err = bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); |
818 | else | |
819 | err = bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
820 | ||
821 | if (pi->chan->mode != L2CAP_MODE_ERTM) | |
822 | return err; | |
823 | ||
824 | /* Attempt to put pending rx data in the socket buffer */ | |
825 | ||
826 | lock_sock(sk); | |
827 | ||
828 | if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state)) | |
829 | goto done; | |
830 | ||
831 | if (pi->rx_busy_skb) { | |
832 | if (!sock_queue_rcv_skb(sk, pi->rx_busy_skb)) | |
833 | pi->rx_busy_skb = NULL; | |
834 | else | |
835 | goto done; | |
836 | } | |
837 | ||
838 | /* Restore data flow when half of the receive buffer is | |
839 | * available. This avoids resending large numbers of | |
840 | * frames. | |
841 | */ | |
842 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1) | |
843 | l2cap_chan_busy(pi->chan, 0); | |
68983259 | 844 | |
e328140f MM |
845 | done: |
846 | release_sock(sk); | |
847 | return err; | |
68983259 GP |
848 | } |
849 | ||
05fc1576 GP |
850 | /* Kill socket (only if zapped and orphan) |
851 | * Must be called on unlocked socket. | |
852 | */ | |
ba3bd0ee | 853 | static void l2cap_sock_kill(struct sock *sk) |
05fc1576 GP |
854 | { |
855 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
856 | return; | |
857 | ||
e05dcc32 | 858 | BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state)); |
05fc1576 GP |
859 | |
860 | /* Kill poor orphan */ | |
6ff5abbf | 861 | |
4af66c69 | 862 | l2cap_chan_put(l2cap_pi(sk)->chan); |
05fc1576 GP |
863 | sock_set_flag(sk, SOCK_DEAD); |
864 | sock_put(sk); | |
865 | } | |
866 | ||
dcba0dba GP |
867 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
868 | { | |
869 | struct sock *sk = sock->sk; | |
7ddb6e0f | 870 | struct l2cap_chan *chan; |
3df91ea2 | 871 | struct l2cap_conn *conn; |
dcba0dba GP |
872 | int err = 0; |
873 | ||
874 | BT_DBG("sock %p, sk %p", sock, sk); | |
875 | ||
876 | if (!sk) | |
877 | return 0; | |
878 | ||
7ddb6e0f | 879 | chan = l2cap_pi(sk)->chan; |
3df91ea2 AE |
880 | conn = chan->conn; |
881 | ||
882 | if (conn) | |
883 | mutex_lock(&conn->chan_lock); | |
7ddb6e0f | 884 | |
6be36555 | 885 | l2cap_chan_lock(chan); |
dcba0dba | 886 | lock_sock(sk); |
6be36555 | 887 | |
dcba0dba | 888 | if (!sk->sk_shutdown) { |
0c1bc5c6 | 889 | if (chan->mode == L2CAP_MODE_ERTM) |
dcba0dba GP |
890 | err = __l2cap_wait_ack(sk); |
891 | ||
892 | sk->sk_shutdown = SHUTDOWN_MASK; | |
3df91ea2 | 893 | |
6be36555 | 894 | release_sock(sk); |
0f852724 | 895 | l2cap_chan_close(chan, 0); |
6be36555 | 896 | lock_sock(sk); |
dcba0dba GP |
897 | |
898 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
899 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
2d792818 | 900 | sk->sk_lingertime); |
dcba0dba GP |
901 | } |
902 | ||
903 | if (!err && sk->sk_err) | |
904 | err = -sk->sk_err; | |
905 | ||
906 | release_sock(sk); | |
6be36555 | 907 | l2cap_chan_unlock(chan); |
3df91ea2 AE |
908 | |
909 | if (conn) | |
910 | mutex_unlock(&conn->chan_lock); | |
911 | ||
dcba0dba GP |
912 | return err; |
913 | } | |
914 | ||
554f05bb GP |
915 | static int l2cap_sock_release(struct socket *sock) |
916 | { | |
917 | struct sock *sk = sock->sk; | |
918 | int err; | |
919 | ||
920 | BT_DBG("sock %p, sk %p", sock, sk); | |
921 | ||
922 | if (!sk) | |
923 | return 0; | |
924 | ||
5b28d95c MY |
925 | bt_sock_unlink(&l2cap_sk_list, sk); |
926 | ||
554f05bb GP |
927 | err = l2cap_sock_shutdown(sock, 2); |
928 | ||
929 | sock_orphan(sk); | |
930 | l2cap_sock_kill(sk); | |
931 | return err; | |
932 | } | |
933 | ||
c0df7f6e AE |
934 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
935 | { | |
936 | struct sock *sk; | |
937 | ||
938 | BT_DBG("parent %p", parent); | |
939 | ||
940 | /* Close not yet accepted channels */ | |
941 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
942 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
943 | ||
944 | l2cap_chan_lock(chan); | |
945 | __clear_chan_timer(chan); | |
946 | l2cap_chan_close(chan, ECONNRESET); | |
947 | l2cap_chan_unlock(chan); | |
948 | ||
949 | l2cap_sock_kill(sk); | |
950 | } | |
951 | } | |
952 | ||
80b98027 | 953 | static struct l2cap_chan *l2cap_sock_new_connection_cb(struct l2cap_chan *chan) |
80808e43 | 954 | { |
80b98027 | 955 | struct sock *sk, *parent = chan->data; |
80808e43 | 956 | |
53826692 GP |
957 | /* Check for backlog size */ |
958 | if (sk_acceptq_is_full(parent)) { | |
959 | BT_DBG("backlog full %d", parent->sk_ack_backlog); | |
960 | return NULL; | |
961 | } | |
962 | ||
80808e43 | 963 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, |
2d792818 | 964 | GFP_ATOMIC); |
80808e43 GP |
965 | if (!sk) |
966 | return NULL; | |
967 | ||
d22015aa OP |
968 | bt_sock_reclassify_lock(sk, BTPROTO_L2CAP); |
969 | ||
80808e43 GP |
970 | l2cap_sock_init(sk, parent); |
971 | ||
644912e1 GP |
972 | bt_accept_enqueue(parent, sk); |
973 | ||
80808e43 GP |
974 | return l2cap_pi(sk)->chan; |
975 | } | |
976 | ||
80b98027 | 977 | static int l2cap_sock_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) |
23070494 | 978 | { |
80b98027 | 979 | struct sock *sk = chan->data; |
84b34d98 | 980 | int err; |
e328140f | 981 | |
6be36555 AE |
982 | lock_sock(sk); |
983 | ||
84b34d98 | 984 | if (l2cap_pi(sk)->rx_busy_skb) { |
6be36555 AE |
985 | err = -ENOMEM; |
986 | goto done; | |
987 | } | |
e328140f MM |
988 | |
989 | err = sock_queue_rcv_skb(sk, skb); | |
990 | ||
991 | /* For ERTM, handle one skb that doesn't fit into the recv | |
992 | * buffer. This is important to do because the data frames | |
993 | * have already been acked, so the skb cannot be discarded. | |
994 | * | |
995 | * Notify the l2cap core that the buffer is full, so the | |
996 | * LOCAL_BUSY state is entered and no more frames are | |
997 | * acked and reassembled until there is buffer space | |
998 | * available. | |
999 | */ | |
84b34d98 MH |
1000 | if (err < 0 && chan->mode == L2CAP_MODE_ERTM) { |
1001 | l2cap_pi(sk)->rx_busy_skb = skb; | |
1002 | l2cap_chan_busy(chan, 1); | |
e328140f MM |
1003 | err = 0; |
1004 | } | |
23070494 | 1005 | |
6be36555 AE |
1006 | done: |
1007 | release_sock(sk); | |
1008 | ||
e328140f | 1009 | return err; |
23070494 GP |
1010 | } |
1011 | ||
80b98027 | 1012 | static void l2cap_sock_close_cb(struct l2cap_chan *chan) |
ba3bd0ee | 1013 | { |
80b98027 | 1014 | struct sock *sk = chan->data; |
ba3bd0ee GP |
1015 | |
1016 | l2cap_sock_kill(sk); | |
1017 | } | |
1018 | ||
c0df7f6e AE |
1019 | static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err) |
1020 | { | |
1021 | struct sock *sk = chan->data; | |
1022 | struct sock *parent; | |
1023 | ||
1024 | lock_sock(sk); | |
1025 | ||
1026 | parent = bt_sk(sk)->parent; | |
1027 | ||
1028 | sock_set_flag(sk, SOCK_ZAPPED); | |
1029 | ||
1030 | switch (chan->state) { | |
1031 | case BT_OPEN: | |
1032 | case BT_BOUND: | |
1033 | case BT_CLOSED: | |
1034 | break; | |
1035 | case BT_LISTEN: | |
1036 | l2cap_sock_cleanup_listen(sk); | |
1037 | sk->sk_state = BT_CLOSED; | |
1038 | chan->state = BT_CLOSED; | |
1039 | ||
1040 | break; | |
1041 | default: | |
1042 | sk->sk_state = BT_CLOSED; | |
1043 | chan->state = BT_CLOSED; | |
1044 | ||
1045 | sk->sk_err = err; | |
1046 | ||
1047 | if (parent) { | |
1048 | bt_accept_unlink(sk); | |
1049 | parent->sk_data_ready(parent, 0); | |
1050 | } else { | |
1051 | sk->sk_state_change(sk); | |
1052 | } | |
1053 | ||
1054 | break; | |
1055 | } | |
1056 | ||
1057 | release_sock(sk); | |
1058 | } | |
1059 | ||
80b98027 | 1060 | static void l2cap_sock_state_change_cb(struct l2cap_chan *chan, int state) |
89bc500e | 1061 | { |
80b98027 | 1062 | struct sock *sk = chan->data; |
89bc500e GP |
1063 | |
1064 | sk->sk_state = state; | |
1065 | } | |
1066 | ||
2f7719ce | 1067 | static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan, |
90338947 | 1068 | unsigned long len, int nb) |
2f7719ce | 1069 | { |
90338947 GP |
1070 | struct sk_buff *skb; |
1071 | int err; | |
1072 | ||
a6a5568c | 1073 | l2cap_chan_unlock(chan); |
90338947 | 1074 | skb = bt_skb_send_alloc(chan->sk, len, nb, &err); |
a6a5568c MM |
1075 | l2cap_chan_lock(chan); |
1076 | ||
90338947 GP |
1077 | if (!skb) |
1078 | return ERR_PTR(err); | |
2f7719ce | 1079 | |
90338947 | 1080 | return skb; |
2f7719ce AE |
1081 | } |
1082 | ||
54a59aa2 AE |
1083 | static void l2cap_sock_ready_cb(struct l2cap_chan *chan) |
1084 | { | |
1085 | struct sock *sk = chan->data; | |
1086 | struct sock *parent; | |
1087 | ||
1088 | lock_sock(sk); | |
1089 | ||
1090 | parent = bt_sk(sk)->parent; | |
1091 | ||
1092 | BT_DBG("sk %p, parent %p", sk, parent); | |
1093 | ||
1094 | sk->sk_state = BT_CONNECTED; | |
1095 | sk->sk_state_change(sk); | |
1096 | ||
1097 | if (parent) | |
1098 | parent->sk_data_ready(parent, 0); | |
1099 | ||
1100 | release_sock(sk); | |
1101 | } | |
1102 | ||
2dc4e510 GP |
1103 | static void l2cap_sock_defer_cb(struct l2cap_chan *chan) |
1104 | { | |
1105 | struct sock *sk = chan->data; | |
1106 | struct sock *parent = bt_sk(sk)->parent; | |
1107 | ||
1108 | if (parent) | |
1109 | parent->sk_data_ready(parent, 0); | |
1110 | } | |
1111 | ||
80808e43 GP |
1112 | static struct l2cap_ops l2cap_chan_ops = { |
1113 | .name = "L2CAP Socket Interface", | |
1114 | .new_connection = l2cap_sock_new_connection_cb, | |
23070494 | 1115 | .recv = l2cap_sock_recv_cb, |
ba3bd0ee | 1116 | .close = l2cap_sock_close_cb, |
c0df7f6e | 1117 | .teardown = l2cap_sock_teardown_cb, |
89bc500e | 1118 | .state_change = l2cap_sock_state_change_cb, |
54a59aa2 | 1119 | .ready = l2cap_sock_ready_cb, |
2dc4e510 | 1120 | .defer = l2cap_sock_defer_cb, |
2f7719ce | 1121 | .alloc_skb = l2cap_sock_alloc_skb_cb, |
80808e43 GP |
1122 | }; |
1123 | ||
bb58f747 GP |
1124 | static void l2cap_sock_destruct(struct sock *sk) |
1125 | { | |
1126 | BT_DBG("sk %p", sk); | |
1127 | ||
23d3a869 SL |
1128 | if (l2cap_pi(sk)->chan) |
1129 | l2cap_chan_put(l2cap_pi(sk)->chan); | |
84b34d98 | 1130 | |
e328140f MM |
1131 | if (l2cap_pi(sk)->rx_busy_skb) { |
1132 | kfree_skb(l2cap_pi(sk)->rx_busy_skb); | |
1133 | l2cap_pi(sk)->rx_busy_skb = NULL; | |
1134 | } | |
1135 | ||
bb58f747 GP |
1136 | skb_queue_purge(&sk->sk_receive_queue); |
1137 | skb_queue_purge(&sk->sk_write_queue); | |
1138 | } | |
1139 | ||
80808e43 | 1140 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747 | 1141 | { |
84b34d98 | 1142 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
bb58f747 GP |
1143 | |
1144 | BT_DBG("sk %p", sk); | |
1145 | ||
1146 | if (parent) { | |
b4450035 GP |
1147 | struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
1148 | ||
bb58f747 | 1149 | sk->sk_type = parent->sk_type; |
c5daa683 | 1150 | bt_sk(sk)->flags = bt_sk(parent)->flags; |
bb58f747 | 1151 | |
715ec005 | 1152 | chan->chan_type = pchan->chan_type; |
0c1bc5c6 GP |
1153 | chan->imtu = pchan->imtu; |
1154 | chan->omtu = pchan->omtu; | |
b4450035 | 1155 | chan->conf_state = pchan->conf_state; |
0c1bc5c6 | 1156 | chan->mode = pchan->mode; |
47d1ec61 GP |
1157 | chan->fcs = pchan->fcs; |
1158 | chan->max_tx = pchan->max_tx; | |
1159 | chan->tx_win = pchan->tx_win; | |
6b3c7104 | 1160 | chan->tx_win_max = pchan->tx_win_max; |
4343478f | 1161 | chan->sec_level = pchan->sec_level; |
d57b0e8b | 1162 | chan->flags = pchan->flags; |
6230c9b4 PM |
1163 | |
1164 | security_sk_clone(parent, sk); | |
bb58f747 | 1165 | } else { |
715ec005 GP |
1166 | |
1167 | switch (sk->sk_type) { | |
1168 | case SOCK_RAW: | |
1169 | chan->chan_type = L2CAP_CHAN_RAW; | |
1170 | break; | |
1171 | case SOCK_DGRAM: | |
1172 | chan->chan_type = L2CAP_CHAN_CONN_LESS; | |
1173 | break; | |
1174 | case SOCK_SEQPACKET: | |
1175 | case SOCK_STREAM: | |
1176 | chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; | |
1177 | break; | |
1178 | } | |
1179 | ||
0c1bc5c6 GP |
1180 | chan->imtu = L2CAP_DEFAULT_MTU; |
1181 | chan->omtu = 0; | |
bb58f747 | 1182 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c6 | 1183 | chan->mode = L2CAP_MODE_ERTM; |
c1360a1c | 1184 | set_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
bb58f747 | 1185 | } else { |
0c1bc5c6 | 1186 | chan->mode = L2CAP_MODE_BASIC; |
bb58f747 | 1187 | } |
bd4b1653 AE |
1188 | |
1189 | l2cap_chan_set_defaults(chan); | |
bb58f747 GP |
1190 | } |
1191 | ||
1192 | /* Default config options */ | |
0c1bc5c6 | 1193 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e43 GP |
1194 | |
1195 | chan->data = sk; | |
1196 | chan->ops = &l2cap_chan_ops; | |
bb58f747 GP |
1197 | } |
1198 | ||
1199 | static struct proto l2cap_proto = { | |
1200 | .name = "L2CAP", | |
1201 | .owner = THIS_MODULE, | |
1202 | .obj_size = sizeof(struct l2cap_pinfo) | |
1203 | }; | |
1204 | ||
2d792818 GP |
1205 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
1206 | int proto, gfp_t prio) | |
bb58f747 GP |
1207 | { |
1208 | struct sock *sk; | |
dc50a06d | 1209 | struct l2cap_chan *chan; |
bb58f747 GP |
1210 | |
1211 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); | |
1212 | if (!sk) | |
1213 | return NULL; | |
1214 | ||
1215 | sock_init_data(sock, sk); | |
1216 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
1217 | ||
1218 | sk->sk_destruct = l2cap_sock_destruct; | |
ba13ccd9 | 1219 | sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; |
bb58f747 GP |
1220 | |
1221 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1222 | ||
1223 | sk->sk_protocol = proto; | |
1224 | sk->sk_state = BT_OPEN; | |
1225 | ||
eef1d9b6 | 1226 | chan = l2cap_chan_create(); |
dc50a06d | 1227 | if (!chan) { |
49dfbb91 | 1228 | sk_free(sk); |
dc50a06d GP |
1229 | return NULL; |
1230 | } | |
1231 | ||
61d6ef3e MM |
1232 | l2cap_chan_hold(chan); |
1233 | ||
eef1d9b6 GP |
1234 | chan->sk = sk; |
1235 | ||
dc50a06d GP |
1236 | l2cap_pi(sk)->chan = chan; |
1237 | ||
bb58f747 GP |
1238 | return sk; |
1239 | } | |
1240 | ||
1241 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
1242 | int kern) | |
1243 | { | |
1244 | struct sock *sk; | |
1245 | ||
1246 | BT_DBG("sock %p", sock); | |
1247 | ||
1248 | sock->state = SS_UNCONNECTED; | |
1249 | ||
1250 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
2d792818 | 1251 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
bb58f747 GP |
1252 | return -ESOCKTNOSUPPORT; |
1253 | ||
1254 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
1255 | return -EPERM; | |
1256 | ||
1257 | sock->ops = &l2cap_sock_ops; | |
1258 | ||
1259 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); | |
1260 | if (!sk) | |
1261 | return -ENOMEM; | |
1262 | ||
1263 | l2cap_sock_init(sk, NULL); | |
5b28d95c | 1264 | bt_sock_link(&l2cap_sk_list, sk); |
bb58f747 GP |
1265 | return 0; |
1266 | } | |
1267 | ||
cf2f90f5 | 1268 | static const struct proto_ops l2cap_sock_ops = { |
65390587 GP |
1269 | .family = PF_BLUETOOTH, |
1270 | .owner = THIS_MODULE, | |
1271 | .release = l2cap_sock_release, | |
1272 | .bind = l2cap_sock_bind, | |
1273 | .connect = l2cap_sock_connect, | |
1274 | .listen = l2cap_sock_listen, | |
1275 | .accept = l2cap_sock_accept, | |
1276 | .getname = l2cap_sock_getname, | |
1277 | .sendmsg = l2cap_sock_sendmsg, | |
1278 | .recvmsg = l2cap_sock_recvmsg, | |
1279 | .poll = bt_sock_poll, | |
1280 | .ioctl = bt_sock_ioctl, | |
1281 | .mmap = sock_no_mmap, | |
1282 | .socketpair = sock_no_socketpair, | |
1283 | .shutdown = l2cap_sock_shutdown, | |
1284 | .setsockopt = l2cap_sock_setsockopt, | |
1285 | .getsockopt = l2cap_sock_getsockopt | |
1286 | }; | |
1287 | ||
bb58f747 GP |
1288 | static const struct net_proto_family l2cap_sock_family_ops = { |
1289 | .family = PF_BLUETOOTH, | |
1290 | .owner = THIS_MODULE, | |
1291 | .create = l2cap_sock_create, | |
1292 | }; | |
1293 | ||
1294 | int __init l2cap_init_sockets(void) | |
1295 | { | |
e2174ca4 | 1296 | int err; |
bb58f747 | 1297 | |
e2174ca4 GP |
1298 | err = proto_register(&l2cap_proto, 0); |
1299 | if (err < 0) | |
1300 | return err; | |
bb58f747 | 1301 | |
e2174ca4 | 1302 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
5b28d95c MY |
1303 | if (err < 0) { |
1304 | BT_ERR("L2CAP socket registration failed"); | |
e2174ca4 | 1305 | goto error; |
5b28d95c MY |
1306 | } |
1307 | ||
b0316615 | 1308 | err = bt_procfs_init(&init_net, "l2cap", &l2cap_sk_list, |
2d792818 | 1309 | NULL); |
5b28d95c MY |
1310 | if (err < 0) { |
1311 | BT_ERR("Failed to create L2CAP proc file"); | |
1312 | bt_sock_unregister(BTPROTO_L2CAP); | |
1313 | goto error; | |
1314 | } | |
bb58f747 | 1315 | |
e2174ca4 | 1316 | BT_INFO("L2CAP socket layer initialized"); |
bb58f747 | 1317 | |
e2174ca4 | 1318 | return 0; |
bb58f747 GP |
1319 | |
1320 | error: | |
e2174ca4 GP |
1321 | proto_unregister(&l2cap_proto); |
1322 | return err; | |
bb58f747 GP |
1323 | } |
1324 | ||
1325 | void l2cap_cleanup_sockets(void) | |
1326 | { | |
5b28d95c | 1327 | bt_procfs_cleanup(&init_net, "l2cap"); |
5e9d7f86 | 1328 | bt_sock_unregister(BTPROTO_L2CAP); |
e2174ca4 | 1329 | proto_unregister(&l2cap_proto); |
bb58f747 | 1330 | } |