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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 | ||
9149761a | 30 | #include <linux/module.h> |
bc3b2d7f | 31 | #include <linux/export.h> |
6230c9b4 | 32 | |
bb58f747 | 33 | #include <net/bluetooth/bluetooth.h> |
33575df7 | 34 | #include <net/bluetooth/hci_core.h> |
bb58f747 | 35 | #include <net/bluetooth/l2cap.h> |
ac4b7236 MH |
36 | |
37 | #include "smp.h" | |
bb58f747 | 38 | |
9149761a JH |
39 | bool enable_lecoc; |
40 | ||
5b28d95c MY |
41 | static struct bt_sock_list l2cap_sk_list = { |
42 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) | |
43 | }; | |
44 | ||
cf2f90f5 | 45 | static const struct proto_ops l2cap_sock_ops; |
80808e43 | 46 | static void l2cap_sock_init(struct sock *sk, struct sock *parent); |
2d792818 GP |
47 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
48 | int proto, gfp_t prio); | |
cf2f90f5 | 49 | |
b3916db3 DH |
50 | bool l2cap_is_socket(struct socket *sock) |
51 | { | |
52 | return sock && sock->ops == &l2cap_sock_ops; | |
53 | } | |
54 | EXPORT_SYMBOL(l2cap_is_socket); | |
55 | ||
af6bcd82 GP |
56 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
57 | { | |
58 | struct sock *sk = sock->sk; | |
4343478f | 59 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
60 | struct sockaddr_l2 la; |
61 | int len, err = 0; | |
62 | ||
63 | BT_DBG("sk %p", sk); | |
64 | ||
65 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
66 | return -EINVAL; | |
67 | ||
68 | memset(&la, 0, sizeof(la)); | |
69 | len = min_t(unsigned int, sizeof(la), alen); | |
70 | memcpy(&la, addr, len); | |
71 | ||
b62f328b | 72 | if (la.l2_cid && la.l2_psm) |
af6bcd82 GP |
73 | return -EINVAL; |
74 | ||
80c1a2e7 JH |
75 | if (!bdaddr_type_is_valid(la.l2_bdaddr_type)) |
76 | return -EINVAL; | |
77 | ||
bfe4655f | 78 | if (bdaddr_type_is_le(la.l2_bdaddr_type)) { |
9149761a | 79 | if (!enable_lecoc && la.l2_psm) |
bfe4655f JH |
80 | return -EINVAL; |
81 | /* We only allow ATT user space socket */ | |
9149761a JH |
82 | if (la.l2_cid && |
83 | la.l2_cid != __constant_cpu_to_le16(L2CAP_CID_ATT)) | |
bfe4655f JH |
84 | return -EINVAL; |
85 | } | |
86 | ||
af6bcd82 GP |
87 | lock_sock(sk); |
88 | ||
89 | if (sk->sk_state != BT_OPEN) { | |
90 | err = -EBADFD; | |
91 | goto done; | |
92 | } | |
93 | ||
94 | if (la.l2_psm) { | |
95 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
96 | ||
97 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
98 | if ((psm & 0x0101) != 0x0001) { | |
99 | err = -EINVAL; | |
100 | goto done; | |
101 | } | |
102 | ||
103 | /* Restrict usage of well-known PSMs */ | |
104 | if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { | |
105 | err = -EACCES; | |
106 | goto done; | |
107 | } | |
108 | } | |
109 | ||
9e4425ff | 110 | if (la.l2_cid) |
6e4aff10 | 111 | err = l2cap_add_scid(chan, __le16_to_cpu(la.l2_cid)); |
9e4425ff GP |
112 | else |
113 | err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm); | |
af6bcd82 | 114 | |
9e4425ff GP |
115 | if (err < 0) |
116 | goto done; | |
af6bcd82 | 117 | |
6a974b50 | 118 | switch (chan->chan_type) { |
3124b843 MH |
119 | case L2CAP_CHAN_CONN_LESS: |
120 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_3DSP) | |
121 | chan->sec_level = BT_SECURITY_SDP; | |
122 | break; | |
6a974b50 MH |
123 | case L2CAP_CHAN_CONN_ORIENTED: |
124 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_SDP || | |
125 | __le16_to_cpu(la.l2_psm) == L2CAP_PSM_RFCOMM) | |
126 | chan->sec_level = BT_SECURITY_SDP; | |
127 | break; | |
128 | } | |
b62f328b | 129 | |
7eafc59e | 130 | bacpy(&chan->src, &la.l2_bdaddr); |
4f1654e0 | 131 | chan->src_type = la.l2_bdaddr_type; |
89bc500e GP |
132 | |
133 | chan->state = BT_BOUND; | |
9e4425ff | 134 | sk->sk_state = BT_BOUND; |
af6bcd82 GP |
135 | |
136 | done: | |
137 | release_sock(sk); | |
138 | return err; | |
139 | } | |
140 | ||
2d792818 GP |
141 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, |
142 | int alen, int flags) | |
4e34c50b GP |
143 | { |
144 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 145 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
4e34c50b GP |
146 | struct sockaddr_l2 la; |
147 | int len, err = 0; | |
148 | ||
149 | BT_DBG("sk %p", sk); | |
150 | ||
151 | if (!addr || alen < sizeof(addr->sa_family) || | |
152 | addr->sa_family != AF_BLUETOOTH) | |
153 | return -EINVAL; | |
154 | ||
155 | memset(&la, 0, sizeof(la)); | |
156 | len = min_t(unsigned int, sizeof(la), alen); | |
157 | memcpy(&la, addr, len); | |
158 | ||
acd7d370 | 159 | if (la.l2_cid && la.l2_psm) |
4e34c50b GP |
160 | return -EINVAL; |
161 | ||
80c1a2e7 JH |
162 | if (!bdaddr_type_is_valid(la.l2_bdaddr_type)) |
163 | return -EINVAL; | |
164 | ||
eb622495 JH |
165 | /* Check that the socket wasn't bound to something that |
166 | * conflicts with the address given to connect(). If chan->src | |
167 | * is BDADDR_ANY it means bind() was never used, in which case | |
168 | * chan->src_type and la.l2_bdaddr_type do not need to match. | |
169 | */ | |
170 | if (chan->src_type == BDADDR_BREDR && bacmp(&chan->src, BDADDR_ANY) && | |
171 | bdaddr_type_is_le(la.l2_bdaddr_type)) { | |
172 | /* Old user space versions will try to incorrectly bind | |
173 | * the ATT socket using BDADDR_BREDR. We need to accept | |
174 | * this and fix up the source address type only when | |
175 | * both the source CID and destination CID indicate | |
176 | * ATT. Anything else is an invalid combination. | |
177 | */ | |
178 | if (chan->scid != L2CAP_CID_ATT || | |
179 | la.l2_cid != __constant_cpu_to_le16(L2CAP_CID_ATT)) | |
180 | return -EINVAL; | |
181 | ||
182 | /* We don't have the hdev available here to make a | |
183 | * better decision on random vs public, but since all | |
184 | * user space versions that exhibit this issue anyway do | |
185 | * not support random local addresses assuming public | |
186 | * here is good enough. | |
187 | */ | |
188 | chan->src_type = BDADDR_LE_PUBLIC; | |
189 | } | |
1f209383 JH |
190 | |
191 | if (chan->src_type != BDADDR_BREDR && la.l2_bdaddr_type == BDADDR_BREDR) | |
192 | return -EINVAL; | |
193 | ||
bfe4655f | 194 | if (bdaddr_type_is_le(la.l2_bdaddr_type)) { |
9149761a | 195 | if (!enable_lecoc && la.l2_psm) |
bfe4655f JH |
196 | return -EINVAL; |
197 | /* We only allow ATT user space socket */ | |
9149761a JH |
198 | if (la.l2_cid && |
199 | la.l2_cid != __constant_cpu_to_le16(L2CAP_CID_ATT)) | |
bfe4655f JH |
200 | return -EINVAL; |
201 | } | |
202 | ||
6e4aff10 | 203 | err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid), |
8e9f9892 | 204 | &la.l2_bdaddr, la.l2_bdaddr_type); |
4e34c50b | 205 | if (err) |
b3fb611e | 206 | return err; |
4e34c50b | 207 | |
6be36555 AE |
208 | lock_sock(sk); |
209 | ||
4e34c50b | 210 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
2d792818 | 211 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
b3fb611e AE |
212 | |
213 | release_sock(sk); | |
214 | ||
4e34c50b GP |
215 | return err; |
216 | } | |
217 | ||
af6bcd82 GP |
218 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
219 | { | |
220 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 221 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
222 | int err = 0; |
223 | ||
224 | BT_DBG("sk %p backlog %d", sk, backlog); | |
225 | ||
226 | lock_sock(sk); | |
227 | ||
6b3af733 | 228 | if (sk->sk_state != BT_BOUND) { |
af6bcd82 GP |
229 | err = -EBADFD; |
230 | goto done; | |
231 | } | |
232 | ||
6b3af733 MH |
233 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) { |
234 | err = -EINVAL; | |
235 | goto done; | |
236 | } | |
237 | ||
0c1bc5c6 | 238 | switch (chan->mode) { |
af6bcd82 GP |
239 | case L2CAP_MODE_BASIC: |
240 | break; | |
241 | case L2CAP_MODE_ERTM: | |
242 | case L2CAP_MODE_STREAMING: | |
243 | if (!disable_ertm) | |
244 | break; | |
245 | /* fall through */ | |
246 | default: | |
247 | err = -ENOTSUPP; | |
248 | goto done; | |
249 | } | |
250 | ||
af6bcd82 GP |
251 | sk->sk_max_ack_backlog = backlog; |
252 | sk->sk_ack_backlog = 0; | |
89bc500e GP |
253 | |
254 | chan->state = BT_LISTEN; | |
af6bcd82 GP |
255 | sk->sk_state = BT_LISTEN; |
256 | ||
257 | done: | |
258 | release_sock(sk); | |
259 | return err; | |
260 | } | |
261 | ||
2d792818 GP |
262 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, |
263 | int flags) | |
c47b7c72 GP |
264 | { |
265 | DECLARE_WAITQUEUE(wait, current); | |
266 | struct sock *sk = sock->sk, *nsk; | |
267 | long timeo; | |
268 | int err = 0; | |
269 | ||
270 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
271 | ||
c47b7c72 GP |
272 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
273 | ||
274 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
275 | ||
276 | /* Wait for an incoming connection. (wake-one). */ | |
277 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
f9a3c20a | 278 | while (1) { |
c47b7c72 | 279 | set_current_state(TASK_INTERRUPTIBLE); |
f9a3c20a PH |
280 | |
281 | if (sk->sk_state != BT_LISTEN) { | |
282 | err = -EBADFD; | |
c47b7c72 GP |
283 | break; |
284 | } | |
285 | ||
f9a3c20a PH |
286 | nsk = bt_accept_dequeue(sk, newsock); |
287 | if (nsk) | |
288 | break; | |
c47b7c72 | 289 | |
f9a3c20a PH |
290 | if (!timeo) { |
291 | err = -EAGAIN; | |
c47b7c72 GP |
292 | break; |
293 | } | |
294 | ||
295 | if (signal_pending(current)) { | |
296 | err = sock_intr_errno(timeo); | |
297 | break; | |
298 | } | |
f9a3c20a PH |
299 | |
300 | release_sock(sk); | |
301 | timeo = schedule_timeout(timeo); | |
302 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
c47b7c72 | 303 | } |
f9a3c20a | 304 | __set_current_state(TASK_RUNNING); |
c47b7c72 GP |
305 | remove_wait_queue(sk_sleep(sk), &wait); |
306 | ||
307 | if (err) | |
308 | goto done; | |
309 | ||
310 | newsock->state = SS_CONNECTED; | |
311 | ||
312 | BT_DBG("new socket %p", nsk); | |
313 | ||
314 | done: | |
315 | release_sock(sk); | |
316 | return err; | |
317 | } | |
318 | ||
2d792818 GP |
319 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, |
320 | int *len, int peer) | |
d7175d55 GP |
321 | { |
322 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
323 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 324 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
d7175d55 GP |
325 | |
326 | BT_DBG("sock %p, sk %p", sock, sk); | |
327 | ||
792039c7 | 328 | memset(la, 0, sizeof(struct sockaddr_l2)); |
d7175d55 GP |
329 | addr->sa_family = AF_BLUETOOTH; |
330 | *len = sizeof(struct sockaddr_l2); | |
331 | ||
332 | if (peer) { | |
fe4128e0 | 333 | la->l2_psm = chan->psm; |
7eafc59e | 334 | bacpy(&la->l2_bdaddr, &chan->dst); |
fe4128e0 | 335 | la->l2_cid = cpu_to_le16(chan->dcid); |
4f1654e0 | 336 | la->l2_bdaddr_type = chan->dst_type; |
d7175d55 | 337 | } else { |
0c1bc5c6 | 338 | la->l2_psm = chan->sport; |
7eafc59e | 339 | bacpy(&la->l2_bdaddr, &chan->src); |
fe4128e0 | 340 | la->l2_cid = cpu_to_le16(chan->scid); |
4f1654e0 | 341 | la->l2_bdaddr_type = chan->src_type; |
d7175d55 GP |
342 | } |
343 | ||
344 | return 0; | |
345 | } | |
346 | ||
2d792818 GP |
347 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, |
348 | char __user *optval, int __user *optlen) | |
99f4808d GP |
349 | { |
350 | struct sock *sk = sock->sk; | |
4343478f | 351 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d GP |
352 | struct l2cap_options opts; |
353 | struct l2cap_conninfo cinfo; | |
354 | int len, err = 0; | |
355 | u32 opt; | |
356 | ||
357 | BT_DBG("sk %p", sk); | |
358 | ||
359 | if (get_user(len, optlen)) | |
360 | return -EFAULT; | |
361 | ||
362 | lock_sock(sk); | |
363 | ||
364 | switch (optname) { | |
365 | case L2CAP_OPTIONS: | |
e3fb592b | 366 | memset(&opts, 0, sizeof(opts)); |
0c1bc5c6 GP |
367 | opts.imtu = chan->imtu; |
368 | opts.omtu = chan->omtu; | |
369 | opts.flush_to = chan->flush_to; | |
370 | opts.mode = chan->mode; | |
47d1ec61 GP |
371 | opts.fcs = chan->fcs; |
372 | opts.max_tx = chan->max_tx; | |
6327eb98 | 373 | opts.txwin_size = chan->tx_win; |
99f4808d GP |
374 | |
375 | len = min_t(unsigned int, len, sizeof(opts)); | |
376 | if (copy_to_user(optval, (char *) &opts, len)) | |
377 | err = -EFAULT; | |
378 | ||
379 | break; | |
380 | ||
381 | case L2CAP_LM: | |
4343478f | 382 | switch (chan->sec_level) { |
99f4808d GP |
383 | case BT_SECURITY_LOW: |
384 | opt = L2CAP_LM_AUTH; | |
385 | break; | |
386 | case BT_SECURITY_MEDIUM: | |
387 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
388 | break; | |
389 | case BT_SECURITY_HIGH: | |
390 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
2d792818 | 391 | L2CAP_LM_SECURE; |
99f4808d GP |
392 | break; |
393 | default: | |
394 | opt = 0; | |
395 | break; | |
396 | } | |
397 | ||
43bd0f32 | 398 | if (test_bit(FLAG_ROLE_SWITCH, &chan->flags)) |
99f4808d GP |
399 | opt |= L2CAP_LM_MASTER; |
400 | ||
ecf61bdb | 401 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
99f4808d GP |
402 | opt |= L2CAP_LM_RELIABLE; |
403 | ||
404 | if (put_user(opt, (u32 __user *) optval)) | |
405 | err = -EFAULT; | |
406 | break; | |
407 | ||
408 | case L2CAP_CONNINFO: | |
409 | if (sk->sk_state != BT_CONNECTED && | |
c5daa683 GP |
410 | !(sk->sk_state == BT_CONNECT2 && |
411 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { | |
99f4808d GP |
412 | err = -ENOTCONN; |
413 | break; | |
414 | } | |
415 | ||
8d03e971 | 416 | memset(&cinfo, 0, sizeof(cinfo)); |
8c1d787b GP |
417 | cinfo.hci_handle = chan->conn->hcon->handle; |
418 | memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); | |
99f4808d GP |
419 | |
420 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
421 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
422 | err = -EFAULT; | |
423 | ||
424 | break; | |
425 | ||
426 | default: | |
427 | err = -ENOPROTOOPT; | |
428 | break; | |
429 | } | |
430 | ||
431 | release_sock(sk); | |
432 | return err; | |
433 | } | |
434 | ||
2d792818 GP |
435 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, |
436 | char __user *optval, int __user *optlen) | |
99f4808d GP |
437 | { |
438 | struct sock *sk = sock->sk; | |
4343478f | 439 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d | 440 | struct bt_security sec; |
14b12d0b | 441 | struct bt_power pwr; |
99f4808d GP |
442 | int len, err = 0; |
443 | ||
444 | BT_DBG("sk %p", sk); | |
445 | ||
446 | if (level == SOL_L2CAP) | |
447 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
448 | ||
449 | if (level != SOL_BLUETOOTH) | |
450 | return -ENOPROTOOPT; | |
451 | ||
452 | if (get_user(len, optlen)) | |
453 | return -EFAULT; | |
454 | ||
455 | lock_sock(sk); | |
456 | ||
457 | switch (optname) { | |
458 | case BT_SECURITY: | |
715ec005 | 459 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
2d792818 | 460 | chan->chan_type != L2CAP_CHAN_RAW) { |
99f4808d GP |
461 | err = -EINVAL; |
462 | break; | |
463 | } | |
464 | ||
8f360119 | 465 | memset(&sec, 0, sizeof(sec)); |
85e34368 | 466 | if (chan->conn) { |
c6585a4d | 467 | sec.level = chan->conn->hcon->sec_level; |
99f4808d | 468 | |
85e34368 AE |
469 | if (sk->sk_state == BT_CONNECTED) |
470 | sec.key_size = chan->conn->hcon->enc_key_size; | |
471 | } else { | |
472 | sec.level = chan->sec_level; | |
473 | } | |
8f360119 | 474 | |
99f4808d GP |
475 | len = min_t(unsigned int, len, sizeof(sec)); |
476 | if (copy_to_user(optval, (char *) &sec, len)) | |
477 | err = -EFAULT; | |
478 | ||
479 | break; | |
480 | ||
481 | case BT_DEFER_SETUP: | |
482 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
483 | err = -EINVAL; | |
484 | break; | |
485 | } | |
486 | ||
c5daa683 GP |
487 | if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), |
488 | (u32 __user *) optval)) | |
99f4808d GP |
489 | err = -EFAULT; |
490 | ||
491 | break; | |
492 | ||
493 | case BT_FLUSHABLE: | |
d57b0e8b | 494 | if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags), |
2d792818 | 495 | (u32 __user *) optval)) |
99f4808d GP |
496 | err = -EFAULT; |
497 | ||
498 | break; | |
499 | ||
14b12d0b JG |
500 | case BT_POWER: |
501 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
2d792818 | 502 | && sk->sk_type != SOCK_RAW) { |
14b12d0b JG |
503 | err = -EINVAL; |
504 | break; | |
505 | } | |
506 | ||
15770b1a | 507 | pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
14b12d0b JG |
508 | |
509 | len = min_t(unsigned int, len, sizeof(pwr)); | |
510 | if (copy_to_user(optval, (char *) &pwr, len)) | |
511 | err = -EFAULT; | |
512 | ||
513 | break; | |
514 | ||
2ea66482 | 515 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
516 | if (put_user(chan->chan_policy, (u32 __user *) optval)) |
517 | err = -EFAULT; | |
518 | break; | |
519 | ||
99f4808d GP |
520 | default: |
521 | err = -ENOPROTOOPT; | |
522 | break; | |
523 | } | |
524 | ||
525 | release_sock(sk); | |
526 | return err; | |
527 | } | |
528 | ||
682877c3 AG |
529 | static bool l2cap_valid_mtu(struct l2cap_chan *chan, u16 mtu) |
530 | { | |
531 | switch (chan->scid) { | |
073d1cf3 | 532 | case L2CAP_CID_ATT: |
8c3a4f00 | 533 | if (mtu < L2CAP_LE_MIN_MTU) |
682877c3 AG |
534 | return false; |
535 | break; | |
536 | ||
537 | default: | |
538 | if (mtu < L2CAP_DEFAULT_MIN_MTU) | |
539 | return false; | |
540 | } | |
541 | ||
542 | return true; | |
543 | } | |
544 | ||
2d792818 GP |
545 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, |
546 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
547 | { |
548 | struct sock *sk = sock->sk; | |
b4450035 | 549 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 GP |
550 | struct l2cap_options opts; |
551 | int len, err = 0; | |
552 | u32 opt; | |
553 | ||
554 | BT_DBG("sk %p", sk); | |
555 | ||
556 | lock_sock(sk); | |
557 | ||
558 | switch (optname) { | |
559 | case L2CAP_OPTIONS: | |
560 | if (sk->sk_state == BT_CONNECTED) { | |
561 | err = -EINVAL; | |
562 | break; | |
563 | } | |
564 | ||
0c1bc5c6 GP |
565 | opts.imtu = chan->imtu; |
566 | opts.omtu = chan->omtu; | |
567 | opts.flush_to = chan->flush_to; | |
568 | opts.mode = chan->mode; | |
47d1ec61 GP |
569 | opts.fcs = chan->fcs; |
570 | opts.max_tx = chan->max_tx; | |
6327eb98 | 571 | opts.txwin_size = chan->tx_win; |
33575df7 GP |
572 | |
573 | len = min_t(unsigned int, sizeof(opts), optlen); | |
574 | if (copy_from_user((char *) &opts, optval, len)) { | |
575 | err = -EFAULT; | |
576 | break; | |
577 | } | |
578 | ||
6327eb98 | 579 | if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) { |
33575df7 GP |
580 | err = -EINVAL; |
581 | break; | |
582 | } | |
583 | ||
682877c3 AG |
584 | if (!l2cap_valid_mtu(chan, opts.imtu)) { |
585 | err = -EINVAL; | |
586 | break; | |
587 | } | |
588 | ||
0c1bc5c6 GP |
589 | chan->mode = opts.mode; |
590 | switch (chan->mode) { | |
33575df7 | 591 | case L2CAP_MODE_BASIC: |
c1360a1c | 592 | clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
33575df7 GP |
593 | break; |
594 | case L2CAP_MODE_ERTM: | |
595 | case L2CAP_MODE_STREAMING: | |
596 | if (!disable_ertm) | |
597 | break; | |
598 | /* fall through */ | |
599 | default: | |
600 | err = -EINVAL; | |
601 | break; | |
602 | } | |
603 | ||
0c1bc5c6 GP |
604 | chan->imtu = opts.imtu; |
605 | chan->omtu = opts.omtu; | |
47d1ec61 GP |
606 | chan->fcs = opts.fcs; |
607 | chan->max_tx = opts.max_tx; | |
6327eb98 | 608 | chan->tx_win = opts.txwin_size; |
12d59781 | 609 | chan->flush_to = opts.flush_to; |
33575df7 GP |
610 | break; |
611 | ||
612 | case L2CAP_LM: | |
613 | if (get_user(opt, (u32 __user *) optval)) { | |
614 | err = -EFAULT; | |
615 | break; | |
616 | } | |
617 | ||
618 | if (opt & L2CAP_LM_AUTH) | |
4343478f | 619 | chan->sec_level = BT_SECURITY_LOW; |
33575df7 | 620 | if (opt & L2CAP_LM_ENCRYPT) |
4343478f | 621 | chan->sec_level = BT_SECURITY_MEDIUM; |
33575df7 | 622 | if (opt & L2CAP_LM_SECURE) |
4343478f | 623 | chan->sec_level = BT_SECURITY_HIGH; |
33575df7 | 624 | |
43bd0f32 AE |
625 | if (opt & L2CAP_LM_MASTER) |
626 | set_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
627 | else | |
628 | clear_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
ecf61bdb AE |
629 | |
630 | if (opt & L2CAP_LM_RELIABLE) | |
631 | set_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
632 | else | |
633 | clear_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
33575df7 GP |
634 | break; |
635 | ||
636 | default: | |
637 | err = -ENOPROTOOPT; | |
638 | break; | |
639 | } | |
640 | ||
641 | release_sock(sk); | |
642 | return err; | |
643 | } | |
644 | ||
2d792818 GP |
645 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, |
646 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
647 | { |
648 | struct sock *sk = sock->sk; | |
4343478f | 649 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 | 650 | struct bt_security sec; |
14b12d0b | 651 | struct bt_power pwr; |
f1cb9af5 | 652 | struct l2cap_conn *conn; |
33575df7 GP |
653 | int len, err = 0; |
654 | u32 opt; | |
655 | ||
656 | BT_DBG("sk %p", sk); | |
657 | ||
658 | if (level == SOL_L2CAP) | |
659 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
660 | ||
661 | if (level != SOL_BLUETOOTH) | |
662 | return -ENOPROTOOPT; | |
663 | ||
664 | lock_sock(sk); | |
665 | ||
666 | switch (optname) { | |
667 | case BT_SECURITY: | |
715ec005 | 668 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
2d792818 | 669 | chan->chan_type != L2CAP_CHAN_RAW) { |
33575df7 GP |
670 | err = -EINVAL; |
671 | break; | |
672 | } | |
673 | ||
674 | sec.level = BT_SECURITY_LOW; | |
675 | ||
676 | len = min_t(unsigned int, sizeof(sec), optlen); | |
677 | if (copy_from_user((char *) &sec, optval, len)) { | |
678 | err = -EFAULT; | |
679 | break; | |
680 | } | |
681 | ||
682 | if (sec.level < BT_SECURITY_LOW || | |
2d792818 | 683 | sec.level > BT_SECURITY_HIGH) { |
33575df7 GP |
684 | err = -EINVAL; |
685 | break; | |
686 | } | |
687 | ||
4343478f | 688 | chan->sec_level = sec.level; |
f1cb9af5 | 689 | |
0bee1d60 GP |
690 | if (!chan->conn) |
691 | break; | |
692 | ||
f1cb9af5 | 693 | conn = chan->conn; |
0bee1d60 GP |
694 | |
695 | /*change security for LE channels */ | |
073d1cf3 | 696 | if (chan->scid == L2CAP_CID_ATT) { |
f1cb9af5 VCG |
697 | if (!conn->hcon->out) { |
698 | err = -EINVAL; | |
699 | break; | |
700 | } | |
701 | ||
cc110922 | 702 | if (smp_conn_security(conn->hcon, sec.level)) |
f1cb9af5 | 703 | break; |
f1cb9af5 | 704 | sk->sk_state = BT_CONFIG; |
3542b854 | 705 | chan->state = BT_CONFIG; |
0bee1d60 | 706 | |
a7d7723a GP |
707 | /* or for ACL link */ |
708 | } else if ((sk->sk_state == BT_CONNECT2 && | |
2d792818 | 709 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) || |
a7d7723a GP |
710 | sk->sk_state == BT_CONNECTED) { |
711 | if (!l2cap_chan_check_security(chan)) | |
c5daa683 | 712 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
a7d7723a GP |
713 | else |
714 | sk->sk_state_change(sk); | |
0bee1d60 GP |
715 | } else { |
716 | err = -EINVAL; | |
f1cb9af5 | 717 | } |
33575df7 GP |
718 | break; |
719 | ||
720 | case BT_DEFER_SETUP: | |
721 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
722 | err = -EINVAL; | |
723 | break; | |
724 | } | |
725 | ||
726 | if (get_user(opt, (u32 __user *) optval)) { | |
727 | err = -EFAULT; | |
728 | break; | |
729 | } | |
730 | ||
bdc25783 | 731 | if (opt) { |
c5daa683 | 732 | set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); |
bdc25783 MH |
733 | set_bit(FLAG_DEFER_SETUP, &chan->flags); |
734 | } else { | |
c5daa683 | 735 | clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); |
bdc25783 MH |
736 | clear_bit(FLAG_DEFER_SETUP, &chan->flags); |
737 | } | |
33575df7 GP |
738 | break; |
739 | ||
740 | case BT_FLUSHABLE: | |
741 | if (get_user(opt, (u32 __user *) optval)) { | |
742 | err = -EFAULT; | |
743 | break; | |
744 | } | |
745 | ||
746 | if (opt > BT_FLUSHABLE_ON) { | |
747 | err = -EINVAL; | |
748 | break; | |
749 | } | |
750 | ||
751 | if (opt == BT_FLUSHABLE_OFF) { | |
c1f23a2b | 752 | conn = chan->conn; |
25985edc | 753 | /* proceed further only when we have l2cap_conn and |
33575df7 GP |
754 | No Flush support in the LM */ |
755 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { | |
756 | err = -EINVAL; | |
757 | break; | |
758 | } | |
759 | } | |
760 | ||
d57b0e8b AE |
761 | if (opt) |
762 | set_bit(FLAG_FLUSHABLE, &chan->flags); | |
763 | else | |
764 | clear_bit(FLAG_FLUSHABLE, &chan->flags); | |
33575df7 GP |
765 | break; |
766 | ||
14b12d0b JG |
767 | case BT_POWER: |
768 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && | |
2d792818 | 769 | chan->chan_type != L2CAP_CHAN_RAW) { |
14b12d0b JG |
770 | err = -EINVAL; |
771 | break; | |
772 | } | |
773 | ||
774 | pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; | |
775 | ||
776 | len = min_t(unsigned int, sizeof(pwr), optlen); | |
777 | if (copy_from_user((char *) &pwr, optval, len)) { | |
778 | err = -EFAULT; | |
779 | break; | |
780 | } | |
15770b1a AE |
781 | |
782 | if (pwr.force_active) | |
783 | set_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
784 | else | |
785 | clear_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
14b12d0b JG |
786 | break; |
787 | ||
2ea66482 | 788 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
789 | if (get_user(opt, (u32 __user *) optval)) { |
790 | err = -EFAULT; | |
791 | break; | |
792 | } | |
793 | ||
794 | if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) { | |
795 | err = -EINVAL; | |
796 | break; | |
797 | } | |
798 | ||
799 | if (chan->mode != L2CAP_MODE_ERTM && | |
2d792818 | 800 | chan->mode != L2CAP_MODE_STREAMING) { |
2ea66482 MM |
801 | err = -EOPNOTSUPP; |
802 | break; | |
803 | } | |
804 | ||
805 | chan->chan_policy = (u8) opt; | |
3f7a56c4 MM |
806 | |
807 | if (sk->sk_state == BT_CONNECTED && | |
808 | chan->move_role == L2CAP_MOVE_ROLE_NONE) | |
809 | l2cap_move_start(chan); | |
810 | ||
14b12d0b JG |
811 | break; |
812 | ||
33575df7 GP |
813 | default: |
814 | err = -ENOPROTOOPT; | |
815 | break; | |
816 | } | |
817 | ||
818 | release_sock(sk); | |
819 | return err; | |
820 | } | |
fd83ccdb | 821 | |
2d792818 GP |
822 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
823 | struct msghdr *msg, size_t len) | |
fd83ccdb GP |
824 | { |
825 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 826 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb GP |
827 | int err; |
828 | ||
829 | BT_DBG("sock %p, sk %p", sock, sk); | |
830 | ||
831 | err = sock_error(sk); | |
832 | if (err) | |
833 | return err; | |
834 | ||
835 | if (msg->msg_flags & MSG_OOB) | |
836 | return -EOPNOTSUPP; | |
837 | ||
a6a5568c | 838 | if (sk->sk_state != BT_CONNECTED) |
9a91a04a | 839 | return -ENOTCONN; |
fd83ccdb | 840 | |
e793dcf0 JH |
841 | lock_sock(sk); |
842 | err = bt_sock_wait_ready(sk, msg->msg_flags); | |
843 | release_sock(sk); | |
844 | if (err) | |
845 | return err; | |
846 | ||
a6a5568c | 847 | l2cap_chan_lock(chan); |
5e59b791 | 848 | err = l2cap_chan_send(chan, msg, len, sk->sk_priority); |
a6a5568c | 849 | l2cap_chan_unlock(chan); |
fd83ccdb | 850 | |
fd83ccdb GP |
851 | return err; |
852 | } | |
33575df7 | 853 | |
2d792818 GP |
854 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
855 | struct msghdr *msg, size_t len, int flags) | |
68983259 GP |
856 | { |
857 | struct sock *sk = sock->sk; | |
e328140f MM |
858 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
859 | int err; | |
68983259 GP |
860 | |
861 | lock_sock(sk); | |
862 | ||
c5daa683 GP |
863 | if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP, |
864 | &bt_sk(sk)->flags)) { | |
8c1d787b | 865 | sk->sk_state = BT_CONFIG; |
3542b854 | 866 | pi->chan->state = BT_CONFIG; |
8c1d787b | 867 | |
e328140f | 868 | __l2cap_connect_rsp_defer(pi->chan); |
970871bc JH |
869 | err = 0; |
870 | goto done; | |
68983259 GP |
871 | } |
872 | ||
873 | release_sock(sk); | |
874 | ||
875 | if (sock->type == SOCK_STREAM) | |
e328140f MM |
876 | err = bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); |
877 | else | |
878 | err = bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
879 | ||
880 | if (pi->chan->mode != L2CAP_MODE_ERTM) | |
881 | return err; | |
882 | ||
883 | /* Attempt to put pending rx data in the socket buffer */ | |
884 | ||
885 | lock_sock(sk); | |
886 | ||
887 | if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state)) | |
888 | goto done; | |
889 | ||
890 | if (pi->rx_busy_skb) { | |
891 | if (!sock_queue_rcv_skb(sk, pi->rx_busy_skb)) | |
892 | pi->rx_busy_skb = NULL; | |
893 | else | |
894 | goto done; | |
895 | } | |
896 | ||
897 | /* Restore data flow when half of the receive buffer is | |
898 | * available. This avoids resending large numbers of | |
899 | * frames. | |
900 | */ | |
901 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1) | |
902 | l2cap_chan_busy(pi->chan, 0); | |
68983259 | 903 | |
e328140f MM |
904 | done: |
905 | release_sock(sk); | |
906 | return err; | |
68983259 GP |
907 | } |
908 | ||
05fc1576 GP |
909 | /* Kill socket (only if zapped and orphan) |
910 | * Must be called on unlocked socket. | |
911 | */ | |
ba3bd0ee | 912 | static void l2cap_sock_kill(struct sock *sk) |
05fc1576 GP |
913 | { |
914 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
915 | return; | |
916 | ||
e05dcc32 | 917 | BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state)); |
05fc1576 GP |
918 | |
919 | /* Kill poor orphan */ | |
6ff5abbf | 920 | |
4af66c69 | 921 | l2cap_chan_put(l2cap_pi(sk)->chan); |
05fc1576 GP |
922 | sock_set_flag(sk, SOCK_DEAD); |
923 | sock_put(sk); | |
924 | } | |
925 | ||
dc25306b GP |
926 | static int __l2cap_wait_ack(struct sock *sk) |
927 | { | |
928 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
929 | DECLARE_WAITQUEUE(wait, current); | |
930 | int err = 0; | |
931 | int timeo = HZ/5; | |
932 | ||
933 | add_wait_queue(sk_sleep(sk), &wait); | |
934 | set_current_state(TASK_INTERRUPTIBLE); | |
935 | while (chan->unacked_frames > 0 && chan->conn) { | |
936 | if (!timeo) | |
937 | timeo = HZ/5; | |
938 | ||
939 | if (signal_pending(current)) { | |
940 | err = sock_intr_errno(timeo); | |
941 | break; | |
942 | } | |
943 | ||
944 | release_sock(sk); | |
945 | timeo = schedule_timeout(timeo); | |
946 | lock_sock(sk); | |
947 | set_current_state(TASK_INTERRUPTIBLE); | |
948 | ||
949 | err = sock_error(sk); | |
950 | if (err) | |
951 | break; | |
952 | } | |
953 | set_current_state(TASK_RUNNING); | |
954 | remove_wait_queue(sk_sleep(sk), &wait); | |
955 | return err; | |
956 | } | |
957 | ||
dcba0dba GP |
958 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
959 | { | |
960 | struct sock *sk = sock->sk; | |
7ddb6e0f | 961 | struct l2cap_chan *chan; |
3df91ea2 | 962 | struct l2cap_conn *conn; |
dcba0dba GP |
963 | int err = 0; |
964 | ||
965 | BT_DBG("sock %p, sk %p", sock, sk); | |
966 | ||
967 | if (!sk) | |
968 | return 0; | |
969 | ||
7ddb6e0f | 970 | chan = l2cap_pi(sk)->chan; |
3df91ea2 AE |
971 | conn = chan->conn; |
972 | ||
973 | if (conn) | |
974 | mutex_lock(&conn->chan_lock); | |
7ddb6e0f | 975 | |
6be36555 | 976 | l2cap_chan_lock(chan); |
dcba0dba | 977 | lock_sock(sk); |
6be36555 | 978 | |
dcba0dba | 979 | if (!sk->sk_shutdown) { |
0c1bc5c6 | 980 | if (chan->mode == L2CAP_MODE_ERTM) |
dcba0dba GP |
981 | err = __l2cap_wait_ack(sk); |
982 | ||
983 | sk->sk_shutdown = SHUTDOWN_MASK; | |
3df91ea2 | 984 | |
6be36555 | 985 | release_sock(sk); |
0f852724 | 986 | l2cap_chan_close(chan, 0); |
6be36555 | 987 | lock_sock(sk); |
dcba0dba GP |
988 | |
989 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
990 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
2d792818 | 991 | sk->sk_lingertime); |
dcba0dba GP |
992 | } |
993 | ||
994 | if (!err && sk->sk_err) | |
995 | err = -sk->sk_err; | |
996 | ||
997 | release_sock(sk); | |
6be36555 | 998 | l2cap_chan_unlock(chan); |
3df91ea2 AE |
999 | |
1000 | if (conn) | |
1001 | mutex_unlock(&conn->chan_lock); | |
1002 | ||
dcba0dba GP |
1003 | return err; |
1004 | } | |
1005 | ||
554f05bb GP |
1006 | static int l2cap_sock_release(struct socket *sock) |
1007 | { | |
1008 | struct sock *sk = sock->sk; | |
1009 | int err; | |
1010 | ||
1011 | BT_DBG("sock %p, sk %p", sock, sk); | |
1012 | ||
1013 | if (!sk) | |
1014 | return 0; | |
1015 | ||
5b28d95c MY |
1016 | bt_sock_unlink(&l2cap_sk_list, sk); |
1017 | ||
554f05bb GP |
1018 | err = l2cap_sock_shutdown(sock, 2); |
1019 | ||
1020 | sock_orphan(sk); | |
1021 | l2cap_sock_kill(sk); | |
1022 | return err; | |
1023 | } | |
1024 | ||
c0df7f6e AE |
1025 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
1026 | { | |
1027 | struct sock *sk; | |
1028 | ||
1029 | BT_DBG("parent %p", parent); | |
1030 | ||
1031 | /* Close not yet accepted channels */ | |
1032 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
1033 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
1034 | ||
1035 | l2cap_chan_lock(chan); | |
1036 | __clear_chan_timer(chan); | |
1037 | l2cap_chan_close(chan, ECONNRESET); | |
1038 | l2cap_chan_unlock(chan); | |
1039 | ||
1040 | l2cap_sock_kill(sk); | |
1041 | } | |
1042 | } | |
1043 | ||
80b98027 | 1044 | static struct l2cap_chan *l2cap_sock_new_connection_cb(struct l2cap_chan *chan) |
80808e43 | 1045 | { |
80b98027 | 1046 | struct sock *sk, *parent = chan->data; |
80808e43 | 1047 | |
8ffb9290 GP |
1048 | lock_sock(parent); |
1049 | ||
53826692 GP |
1050 | /* Check for backlog size */ |
1051 | if (sk_acceptq_is_full(parent)) { | |
1052 | BT_DBG("backlog full %d", parent->sk_ack_backlog); | |
1053 | return NULL; | |
1054 | } | |
1055 | ||
80808e43 | 1056 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, |
2d792818 | 1057 | GFP_ATOMIC); |
80808e43 GP |
1058 | if (!sk) |
1059 | return NULL; | |
1060 | ||
d22015aa OP |
1061 | bt_sock_reclassify_lock(sk, BTPROTO_L2CAP); |
1062 | ||
80808e43 GP |
1063 | l2cap_sock_init(sk, parent); |
1064 | ||
644912e1 GP |
1065 | bt_accept_enqueue(parent, sk); |
1066 | ||
8ffb9290 GP |
1067 | release_sock(parent); |
1068 | ||
80808e43 GP |
1069 | return l2cap_pi(sk)->chan; |
1070 | } | |
1071 | ||
80b98027 | 1072 | static int l2cap_sock_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) |
23070494 | 1073 | { |
80b98027 | 1074 | struct sock *sk = chan->data; |
84b34d98 | 1075 | int err; |
e328140f | 1076 | |
6be36555 AE |
1077 | lock_sock(sk); |
1078 | ||
84b34d98 | 1079 | if (l2cap_pi(sk)->rx_busy_skb) { |
6be36555 AE |
1080 | err = -ENOMEM; |
1081 | goto done; | |
1082 | } | |
e328140f MM |
1083 | |
1084 | err = sock_queue_rcv_skb(sk, skb); | |
1085 | ||
1086 | /* For ERTM, handle one skb that doesn't fit into the recv | |
1087 | * buffer. This is important to do because the data frames | |
1088 | * have already been acked, so the skb cannot be discarded. | |
1089 | * | |
1090 | * Notify the l2cap core that the buffer is full, so the | |
1091 | * LOCAL_BUSY state is entered and no more frames are | |
1092 | * acked and reassembled until there is buffer space | |
1093 | * available. | |
1094 | */ | |
84b34d98 MH |
1095 | if (err < 0 && chan->mode == L2CAP_MODE_ERTM) { |
1096 | l2cap_pi(sk)->rx_busy_skb = skb; | |
1097 | l2cap_chan_busy(chan, 1); | |
e328140f MM |
1098 | err = 0; |
1099 | } | |
23070494 | 1100 | |
6be36555 AE |
1101 | done: |
1102 | release_sock(sk); | |
1103 | ||
e328140f | 1104 | return err; |
23070494 GP |
1105 | } |
1106 | ||
80b98027 | 1107 | static void l2cap_sock_close_cb(struct l2cap_chan *chan) |
ba3bd0ee | 1108 | { |
80b98027 | 1109 | struct sock *sk = chan->data; |
ba3bd0ee GP |
1110 | |
1111 | l2cap_sock_kill(sk); | |
1112 | } | |
1113 | ||
c0df7f6e AE |
1114 | static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err) |
1115 | { | |
1116 | struct sock *sk = chan->data; | |
1117 | struct sock *parent; | |
1118 | ||
1119 | lock_sock(sk); | |
1120 | ||
1121 | parent = bt_sk(sk)->parent; | |
1122 | ||
1123 | sock_set_flag(sk, SOCK_ZAPPED); | |
1124 | ||
1125 | switch (chan->state) { | |
1126 | case BT_OPEN: | |
1127 | case BT_BOUND: | |
1128 | case BT_CLOSED: | |
1129 | break; | |
1130 | case BT_LISTEN: | |
1131 | l2cap_sock_cleanup_listen(sk); | |
1132 | sk->sk_state = BT_CLOSED; | |
1133 | chan->state = BT_CLOSED; | |
1134 | ||
1135 | break; | |
1136 | default: | |
1137 | sk->sk_state = BT_CLOSED; | |
1138 | chan->state = BT_CLOSED; | |
1139 | ||
1140 | sk->sk_err = err; | |
1141 | ||
1142 | if (parent) { | |
1143 | bt_accept_unlink(sk); | |
1144 | parent->sk_data_ready(parent, 0); | |
1145 | } else { | |
1146 | sk->sk_state_change(sk); | |
1147 | } | |
1148 | ||
1149 | break; | |
1150 | } | |
1151 | ||
1152 | release_sock(sk); | |
1153 | } | |
1154 | ||
53f52121 GP |
1155 | static void l2cap_sock_state_change_cb(struct l2cap_chan *chan, int state, |
1156 | int err) | |
89bc500e | 1157 | { |
80b98027 | 1158 | struct sock *sk = chan->data; |
89bc500e GP |
1159 | |
1160 | sk->sk_state = state; | |
53f52121 GP |
1161 | |
1162 | if (err) | |
1163 | sk->sk_err = err; | |
89bc500e GP |
1164 | } |
1165 | ||
2f7719ce | 1166 | static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan, |
90338947 | 1167 | unsigned long len, int nb) |
2f7719ce | 1168 | { |
0f2c6153 | 1169 | struct sock *sk = chan->data; |
90338947 GP |
1170 | struct sk_buff *skb; |
1171 | int err; | |
1172 | ||
a6a5568c | 1173 | l2cap_chan_unlock(chan); |
0f2c6153 | 1174 | skb = bt_skb_send_alloc(sk, len, nb, &err); |
a6a5568c MM |
1175 | l2cap_chan_lock(chan); |
1176 | ||
90338947 GP |
1177 | if (!skb) |
1178 | return ERR_PTR(err); | |
2f7719ce | 1179 | |
0e790c64 GP |
1180 | bt_cb(skb)->chan = chan; |
1181 | ||
90338947 | 1182 | return skb; |
2f7719ce AE |
1183 | } |
1184 | ||
54a59aa2 AE |
1185 | static void l2cap_sock_ready_cb(struct l2cap_chan *chan) |
1186 | { | |
1187 | struct sock *sk = chan->data; | |
1188 | struct sock *parent; | |
1189 | ||
1190 | lock_sock(sk); | |
1191 | ||
1192 | parent = bt_sk(sk)->parent; | |
1193 | ||
1194 | BT_DBG("sk %p, parent %p", sk, parent); | |
1195 | ||
1196 | sk->sk_state = BT_CONNECTED; | |
1197 | sk->sk_state_change(sk); | |
1198 | ||
1199 | if (parent) | |
1200 | parent->sk_data_ready(parent, 0); | |
1201 | ||
1202 | release_sock(sk); | |
1203 | } | |
1204 | ||
2dc4e510 GP |
1205 | static void l2cap_sock_defer_cb(struct l2cap_chan *chan) |
1206 | { | |
acdcabf5 GP |
1207 | struct sock *parent, *sk = chan->data; |
1208 | ||
1209 | lock_sock(sk); | |
2dc4e510 | 1210 | |
acdcabf5 | 1211 | parent = bt_sk(sk)->parent; |
2dc4e510 GP |
1212 | if (parent) |
1213 | parent->sk_data_ready(parent, 0); | |
acdcabf5 GP |
1214 | |
1215 | release_sock(sk); | |
2dc4e510 GP |
1216 | } |
1217 | ||
d97c899b MH |
1218 | static void l2cap_sock_resume_cb(struct l2cap_chan *chan) |
1219 | { | |
1220 | struct sock *sk = chan->data; | |
1221 | ||
1222 | clear_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); | |
1223 | sk->sk_state_change(sk); | |
1224 | } | |
1225 | ||
5ec1bbe5 GP |
1226 | static void l2cap_sock_set_shutdown_cb(struct l2cap_chan *chan) |
1227 | { | |
1228 | struct sock *sk = chan->data; | |
1229 | ||
1230 | lock_sock(sk); | |
1231 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1232 | release_sock(sk); | |
1233 | } | |
1234 | ||
8d836d71 GP |
1235 | static long l2cap_sock_get_sndtimeo_cb(struct l2cap_chan *chan) |
1236 | { | |
1237 | struct sock *sk = chan->data; | |
1238 | ||
1239 | return sk->sk_sndtimeo; | |
1240 | } | |
1241 | ||
80808e43 GP |
1242 | static struct l2cap_ops l2cap_chan_ops = { |
1243 | .name = "L2CAP Socket Interface", | |
1244 | .new_connection = l2cap_sock_new_connection_cb, | |
23070494 | 1245 | .recv = l2cap_sock_recv_cb, |
ba3bd0ee | 1246 | .close = l2cap_sock_close_cb, |
c0df7f6e | 1247 | .teardown = l2cap_sock_teardown_cb, |
89bc500e | 1248 | .state_change = l2cap_sock_state_change_cb, |
54a59aa2 | 1249 | .ready = l2cap_sock_ready_cb, |
2dc4e510 | 1250 | .defer = l2cap_sock_defer_cb, |
d97c899b | 1251 | .resume = l2cap_sock_resume_cb, |
5ec1bbe5 | 1252 | .set_shutdown = l2cap_sock_set_shutdown_cb, |
8d836d71 | 1253 | .get_sndtimeo = l2cap_sock_get_sndtimeo_cb, |
2f7719ce | 1254 | .alloc_skb = l2cap_sock_alloc_skb_cb, |
80808e43 GP |
1255 | }; |
1256 | ||
bb58f747 GP |
1257 | static void l2cap_sock_destruct(struct sock *sk) |
1258 | { | |
1259 | BT_DBG("sk %p", sk); | |
1260 | ||
23d3a869 SL |
1261 | if (l2cap_pi(sk)->chan) |
1262 | l2cap_chan_put(l2cap_pi(sk)->chan); | |
84b34d98 | 1263 | |
e328140f MM |
1264 | if (l2cap_pi(sk)->rx_busy_skb) { |
1265 | kfree_skb(l2cap_pi(sk)->rx_busy_skb); | |
1266 | l2cap_pi(sk)->rx_busy_skb = NULL; | |
1267 | } | |
1268 | ||
bb58f747 GP |
1269 | skb_queue_purge(&sk->sk_receive_queue); |
1270 | skb_queue_purge(&sk->sk_write_queue); | |
1271 | } | |
1272 | ||
2edf870d MH |
1273 | static void l2cap_skb_msg_name(struct sk_buff *skb, void *msg_name, |
1274 | int *msg_namelen) | |
1275 | { | |
1276 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) msg_name; | |
1277 | ||
1278 | memset(la, 0, sizeof(struct sockaddr_l2)); | |
1279 | la->l2_family = AF_BLUETOOTH; | |
1280 | la->l2_psm = bt_cb(skb)->psm; | |
1281 | bacpy(&la->l2_bdaddr, &bt_cb(skb)->bdaddr); | |
1282 | ||
1283 | *msg_namelen = sizeof(struct sockaddr_l2); | |
1284 | } | |
1285 | ||
80808e43 | 1286 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747 | 1287 | { |
84b34d98 | 1288 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
bb58f747 GP |
1289 | |
1290 | BT_DBG("sk %p", sk); | |
1291 | ||
1292 | if (parent) { | |
b4450035 GP |
1293 | struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
1294 | ||
bb58f747 | 1295 | sk->sk_type = parent->sk_type; |
c5daa683 | 1296 | bt_sk(sk)->flags = bt_sk(parent)->flags; |
bb58f747 | 1297 | |
715ec005 | 1298 | chan->chan_type = pchan->chan_type; |
0c1bc5c6 GP |
1299 | chan->imtu = pchan->imtu; |
1300 | chan->omtu = pchan->omtu; | |
b4450035 | 1301 | chan->conf_state = pchan->conf_state; |
0c1bc5c6 | 1302 | chan->mode = pchan->mode; |
47d1ec61 GP |
1303 | chan->fcs = pchan->fcs; |
1304 | chan->max_tx = pchan->max_tx; | |
1305 | chan->tx_win = pchan->tx_win; | |
6b3c7104 | 1306 | chan->tx_win_max = pchan->tx_win_max; |
4343478f | 1307 | chan->sec_level = pchan->sec_level; |
d57b0e8b | 1308 | chan->flags = pchan->flags; |
6230c9b4 PM |
1309 | |
1310 | security_sk_clone(parent, sk); | |
bb58f747 | 1311 | } else { |
715ec005 GP |
1312 | switch (sk->sk_type) { |
1313 | case SOCK_RAW: | |
1314 | chan->chan_type = L2CAP_CHAN_RAW; | |
1315 | break; | |
1316 | case SOCK_DGRAM: | |
1317 | chan->chan_type = L2CAP_CHAN_CONN_LESS; | |
2edf870d | 1318 | bt_sk(sk)->skb_msg_name = l2cap_skb_msg_name; |
715ec005 GP |
1319 | break; |
1320 | case SOCK_SEQPACKET: | |
1321 | case SOCK_STREAM: | |
1322 | chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; | |
1323 | break; | |
1324 | } | |
1325 | ||
0c1bc5c6 GP |
1326 | chan->imtu = L2CAP_DEFAULT_MTU; |
1327 | chan->omtu = 0; | |
bb58f747 | 1328 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c6 | 1329 | chan->mode = L2CAP_MODE_ERTM; |
c1360a1c | 1330 | set_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
bb58f747 | 1331 | } else { |
0c1bc5c6 | 1332 | chan->mode = L2CAP_MODE_BASIC; |
bb58f747 | 1333 | } |
bd4b1653 AE |
1334 | |
1335 | l2cap_chan_set_defaults(chan); | |
bb58f747 GP |
1336 | } |
1337 | ||
1338 | /* Default config options */ | |
0c1bc5c6 | 1339 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e43 GP |
1340 | |
1341 | chan->data = sk; | |
1342 | chan->ops = &l2cap_chan_ops; | |
bb58f747 GP |
1343 | } |
1344 | ||
1345 | static struct proto l2cap_proto = { | |
1346 | .name = "L2CAP", | |
1347 | .owner = THIS_MODULE, | |
1348 | .obj_size = sizeof(struct l2cap_pinfo) | |
1349 | }; | |
1350 | ||
2d792818 GP |
1351 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
1352 | int proto, gfp_t prio) | |
bb58f747 GP |
1353 | { |
1354 | struct sock *sk; | |
dc50a06d | 1355 | struct l2cap_chan *chan; |
bb58f747 GP |
1356 | |
1357 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); | |
1358 | if (!sk) | |
1359 | return NULL; | |
1360 | ||
1361 | sock_init_data(sock, sk); | |
1362 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
1363 | ||
1364 | sk->sk_destruct = l2cap_sock_destruct; | |
ba13ccd9 | 1365 | sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; |
bb58f747 GP |
1366 | |
1367 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1368 | ||
1369 | sk->sk_protocol = proto; | |
1370 | sk->sk_state = BT_OPEN; | |
1371 | ||
eef1d9b6 | 1372 | chan = l2cap_chan_create(); |
dc50a06d | 1373 | if (!chan) { |
49dfbb91 | 1374 | sk_free(sk); |
dc50a06d GP |
1375 | return NULL; |
1376 | } | |
1377 | ||
61d6ef3e MM |
1378 | l2cap_chan_hold(chan); |
1379 | ||
dc50a06d GP |
1380 | l2cap_pi(sk)->chan = chan; |
1381 | ||
bb58f747 GP |
1382 | return sk; |
1383 | } | |
1384 | ||
1385 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
1386 | int kern) | |
1387 | { | |
1388 | struct sock *sk; | |
1389 | ||
1390 | BT_DBG("sock %p", sock); | |
1391 | ||
1392 | sock->state = SS_UNCONNECTED; | |
1393 | ||
1394 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
2d792818 | 1395 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
bb58f747 GP |
1396 | return -ESOCKTNOSUPPORT; |
1397 | ||
1398 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
1399 | return -EPERM; | |
1400 | ||
1401 | sock->ops = &l2cap_sock_ops; | |
1402 | ||
1403 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); | |
1404 | if (!sk) | |
1405 | return -ENOMEM; | |
1406 | ||
1407 | l2cap_sock_init(sk, NULL); | |
5b28d95c | 1408 | bt_sock_link(&l2cap_sk_list, sk); |
bb58f747 GP |
1409 | return 0; |
1410 | } | |
1411 | ||
cf2f90f5 | 1412 | static const struct proto_ops l2cap_sock_ops = { |
65390587 GP |
1413 | .family = PF_BLUETOOTH, |
1414 | .owner = THIS_MODULE, | |
1415 | .release = l2cap_sock_release, | |
1416 | .bind = l2cap_sock_bind, | |
1417 | .connect = l2cap_sock_connect, | |
1418 | .listen = l2cap_sock_listen, | |
1419 | .accept = l2cap_sock_accept, | |
1420 | .getname = l2cap_sock_getname, | |
1421 | .sendmsg = l2cap_sock_sendmsg, | |
1422 | .recvmsg = l2cap_sock_recvmsg, | |
1423 | .poll = bt_sock_poll, | |
1424 | .ioctl = bt_sock_ioctl, | |
1425 | .mmap = sock_no_mmap, | |
1426 | .socketpair = sock_no_socketpair, | |
1427 | .shutdown = l2cap_sock_shutdown, | |
1428 | .setsockopt = l2cap_sock_setsockopt, | |
1429 | .getsockopt = l2cap_sock_getsockopt | |
1430 | }; | |
1431 | ||
bb58f747 GP |
1432 | static const struct net_proto_family l2cap_sock_family_ops = { |
1433 | .family = PF_BLUETOOTH, | |
1434 | .owner = THIS_MODULE, | |
1435 | .create = l2cap_sock_create, | |
1436 | }; | |
1437 | ||
1438 | int __init l2cap_init_sockets(void) | |
1439 | { | |
e2174ca4 | 1440 | int err; |
bb58f747 | 1441 | |
e2174ca4 GP |
1442 | err = proto_register(&l2cap_proto, 0); |
1443 | if (err < 0) | |
1444 | return err; | |
bb58f747 | 1445 | |
e2174ca4 | 1446 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
5b28d95c MY |
1447 | if (err < 0) { |
1448 | BT_ERR("L2CAP socket registration failed"); | |
e2174ca4 | 1449 | goto error; |
5b28d95c MY |
1450 | } |
1451 | ||
b0316615 | 1452 | err = bt_procfs_init(&init_net, "l2cap", &l2cap_sk_list, |
2d792818 | 1453 | NULL); |
5b28d95c MY |
1454 | if (err < 0) { |
1455 | BT_ERR("Failed to create L2CAP proc file"); | |
1456 | bt_sock_unregister(BTPROTO_L2CAP); | |
1457 | goto error; | |
1458 | } | |
bb58f747 | 1459 | |
e2174ca4 | 1460 | BT_INFO("L2CAP socket layer initialized"); |
bb58f747 | 1461 | |
e2174ca4 | 1462 | return 0; |
bb58f747 GP |
1463 | |
1464 | error: | |
e2174ca4 GP |
1465 | proto_unregister(&l2cap_proto); |
1466 | return err; | |
bb58f747 GP |
1467 | } |
1468 | ||
1469 | void l2cap_cleanup_sockets(void) | |
1470 | { | |
5b28d95c | 1471 | bt_procfs_cleanup(&init_net, "l2cap"); |
5e9d7f86 | 1472 | bt_sock_unregister(BTPROTO_L2CAP); |
e2174ca4 | 1473 | proto_unregister(&l2cap_proto); |
bb58f747 | 1474 | } |
9149761a JH |
1475 | |
1476 | module_param(enable_lecoc, bool, 0644); | |
1477 | MODULE_PARM_DESC(enable_lecoc, "Enable support for LE CoC"); |