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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 | |
5b28d95c MY |
39 | static struct bt_sock_list l2cap_sk_list = { |
40 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) | |
41 | }; | |
42 | ||
cf2f90f5 | 43 | static const struct proto_ops l2cap_sock_ops; |
80808e43 | 44 | static void l2cap_sock_init(struct sock *sk, struct sock *parent); |
2d792818 GP |
45 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
46 | int proto, gfp_t prio); | |
cf2f90f5 | 47 | |
b3916db3 DH |
48 | bool l2cap_is_socket(struct socket *sock) |
49 | { | |
50 | return sock && sock->ops == &l2cap_sock_ops; | |
51 | } | |
52 | EXPORT_SYMBOL(l2cap_is_socket); | |
53 | ||
4946096d JH |
54 | static int l2cap_validate_bredr_psm(u16 psm) |
55 | { | |
56 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
57 | if ((psm & 0x0101) != 0x0001) | |
58 | return -EINVAL; | |
59 | ||
60 | /* Restrict usage of well-known PSMs */ | |
61 | if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) | |
62 | return -EACCES; | |
63 | ||
64 | return 0; | |
65 | } | |
66 | ||
67 | static int l2cap_validate_le_psm(u16 psm) | |
68 | { | |
69 | /* Valid LE_PSM ranges are defined only until 0x00ff */ | |
70 | if (psm > 0x00ff) | |
71 | return -EINVAL; | |
72 | ||
73 | /* Restrict fixed, SIG assigned PSM values to CAP_NET_BIND_SERVICE */ | |
74 | if (psm <= 0x007f && !capable(CAP_NET_BIND_SERVICE)) | |
75 | return -EACCES; | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
af6bcd82 GP |
80 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
81 | { | |
82 | struct sock *sk = sock->sk; | |
4343478f | 83 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
84 | struct sockaddr_l2 la; |
85 | int len, err = 0; | |
86 | ||
87 | BT_DBG("sk %p", sk); | |
88 | ||
89 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
90 | return -EINVAL; | |
91 | ||
92 | memset(&la, 0, sizeof(la)); | |
93 | len = min_t(unsigned int, sizeof(la), alen); | |
94 | memcpy(&la, addr, len); | |
95 | ||
b62f328b | 96 | if (la.l2_cid && la.l2_psm) |
af6bcd82 GP |
97 | return -EINVAL; |
98 | ||
80c1a2e7 JH |
99 | if (!bdaddr_type_is_valid(la.l2_bdaddr_type)) |
100 | return -EINVAL; | |
101 | ||
21626e62 JH |
102 | if (la.l2_cid) { |
103 | /* When the socket gets created it defaults to | |
104 | * CHAN_CONN_ORIENTED, so we need to overwrite the | |
105 | * default here. | |
106 | */ | |
107 | chan->chan_type = L2CAP_CHAN_FIXED; | |
108 | chan->omtu = L2CAP_DEFAULT_MTU; | |
109 | } | |
110 | ||
bfe4655f | 111 | if (bdaddr_type_is_le(la.l2_bdaddr_type)) { |
bfe4655f | 112 | /* We only allow ATT user space socket */ |
9149761a | 113 | if (la.l2_cid && |
dcf4adbf | 114 | la.l2_cid != cpu_to_le16(L2CAP_CID_ATT)) |
bfe4655f JH |
115 | return -EINVAL; |
116 | } | |
117 | ||
af6bcd82 GP |
118 | lock_sock(sk); |
119 | ||
120 | if (sk->sk_state != BT_OPEN) { | |
121 | err = -EBADFD; | |
122 | goto done; | |
123 | } | |
124 | ||
125 | if (la.l2_psm) { | |
126 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
127 | ||
4946096d JH |
128 | if (la.l2_bdaddr_type == BDADDR_BREDR) |
129 | err = l2cap_validate_bredr_psm(psm); | |
130 | else | |
131 | err = l2cap_validate_le_psm(psm); | |
af6bcd82 | 132 | |
4946096d | 133 | if (err) |
af6bcd82 | 134 | goto done; |
af6bcd82 GP |
135 | } |
136 | ||
9e4425ff | 137 | if (la.l2_cid) |
6e4aff10 | 138 | err = l2cap_add_scid(chan, __le16_to_cpu(la.l2_cid)); |
9e4425ff GP |
139 | else |
140 | err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm); | |
af6bcd82 | 141 | |
9e4425ff GP |
142 | if (err < 0) |
143 | goto done; | |
af6bcd82 | 144 | |
6a974b50 | 145 | switch (chan->chan_type) { |
3124b843 MH |
146 | case L2CAP_CHAN_CONN_LESS: |
147 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_3DSP) | |
148 | chan->sec_level = BT_SECURITY_SDP; | |
149 | break; | |
6a974b50 MH |
150 | case L2CAP_CHAN_CONN_ORIENTED: |
151 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_SDP || | |
152 | __le16_to_cpu(la.l2_psm) == L2CAP_PSM_RFCOMM) | |
153 | chan->sec_level = BT_SECURITY_SDP; | |
154 | break; | |
cb6ca8e1 JH |
155 | case L2CAP_CHAN_RAW: |
156 | chan->sec_level = BT_SECURITY_SDP; | |
157 | break; | |
6a974b50 | 158 | } |
b62f328b | 159 | |
7eafc59e | 160 | bacpy(&chan->src, &la.l2_bdaddr); |
4f1654e0 | 161 | chan->src_type = la.l2_bdaddr_type; |
89bc500e | 162 | |
38319713 | 163 | if (chan->psm && bdaddr_type_is_le(chan->src_type)) |
0ce43ce6 | 164 | chan->mode = L2CAP_MODE_LE_FLOWCTL; |
38319713 | 165 | |
89bc500e | 166 | chan->state = BT_BOUND; |
9e4425ff | 167 | sk->sk_state = BT_BOUND; |
af6bcd82 GP |
168 | |
169 | done: | |
170 | release_sock(sk); | |
171 | return err; | |
172 | } | |
173 | ||
2d792818 GP |
174 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, |
175 | int alen, int flags) | |
4e34c50b GP |
176 | { |
177 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 178 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
4e34c50b GP |
179 | struct sockaddr_l2 la; |
180 | int len, err = 0; | |
181 | ||
182 | BT_DBG("sk %p", sk); | |
183 | ||
184 | if (!addr || alen < sizeof(addr->sa_family) || | |
185 | addr->sa_family != AF_BLUETOOTH) | |
186 | return -EINVAL; | |
187 | ||
188 | memset(&la, 0, sizeof(la)); | |
189 | len = min_t(unsigned int, sizeof(la), alen); | |
190 | memcpy(&la, addr, len); | |
191 | ||
acd7d370 | 192 | if (la.l2_cid && la.l2_psm) |
4e34c50b GP |
193 | return -EINVAL; |
194 | ||
80c1a2e7 JH |
195 | if (!bdaddr_type_is_valid(la.l2_bdaddr_type)) |
196 | return -EINVAL; | |
197 | ||
eb622495 JH |
198 | /* Check that the socket wasn't bound to something that |
199 | * conflicts with the address given to connect(). If chan->src | |
200 | * is BDADDR_ANY it means bind() was never used, in which case | |
201 | * chan->src_type and la.l2_bdaddr_type do not need to match. | |
202 | */ | |
203 | if (chan->src_type == BDADDR_BREDR && bacmp(&chan->src, BDADDR_ANY) && | |
204 | bdaddr_type_is_le(la.l2_bdaddr_type)) { | |
205 | /* Old user space versions will try to incorrectly bind | |
206 | * the ATT socket using BDADDR_BREDR. We need to accept | |
207 | * this and fix up the source address type only when | |
208 | * both the source CID and destination CID indicate | |
209 | * ATT. Anything else is an invalid combination. | |
210 | */ | |
211 | if (chan->scid != L2CAP_CID_ATT || | |
dcf4adbf | 212 | la.l2_cid != cpu_to_le16(L2CAP_CID_ATT)) |
eb622495 JH |
213 | return -EINVAL; |
214 | ||
215 | /* We don't have the hdev available here to make a | |
216 | * better decision on random vs public, but since all | |
217 | * user space versions that exhibit this issue anyway do | |
218 | * not support random local addresses assuming public | |
219 | * here is good enough. | |
220 | */ | |
221 | chan->src_type = BDADDR_LE_PUBLIC; | |
222 | } | |
1f209383 JH |
223 | |
224 | if (chan->src_type != BDADDR_BREDR && la.l2_bdaddr_type == BDADDR_BREDR) | |
225 | return -EINVAL; | |
226 | ||
bfe4655f | 227 | if (bdaddr_type_is_le(la.l2_bdaddr_type)) { |
bfe4655f | 228 | /* We only allow ATT user space socket */ |
9149761a | 229 | if (la.l2_cid && |
dcf4adbf | 230 | la.l2_cid != cpu_to_le16(L2CAP_CID_ATT)) |
bfe4655f JH |
231 | return -EINVAL; |
232 | } | |
233 | ||
38319713 | 234 | if (chan->psm && bdaddr_type_is_le(chan->src_type)) |
0ce43ce6 | 235 | chan->mode = L2CAP_MODE_LE_FLOWCTL; |
38319713 | 236 | |
6e4aff10 | 237 | err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid), |
8e9f9892 | 238 | &la.l2_bdaddr, la.l2_bdaddr_type); |
4e34c50b | 239 | if (err) |
b3fb611e | 240 | return err; |
4e34c50b | 241 | |
6be36555 AE |
242 | lock_sock(sk); |
243 | ||
4e34c50b | 244 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
2d792818 | 245 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
b3fb611e AE |
246 | |
247 | release_sock(sk); | |
248 | ||
4e34c50b GP |
249 | return err; |
250 | } | |
251 | ||
af6bcd82 GP |
252 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
253 | { | |
254 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 255 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
256 | int err = 0; |
257 | ||
258 | BT_DBG("sk %p backlog %d", sk, backlog); | |
259 | ||
260 | lock_sock(sk); | |
261 | ||
6b3af733 | 262 | if (sk->sk_state != BT_BOUND) { |
af6bcd82 GP |
263 | err = -EBADFD; |
264 | goto done; | |
265 | } | |
266 | ||
6b3af733 MH |
267 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) { |
268 | err = -EINVAL; | |
269 | goto done; | |
270 | } | |
271 | ||
0c1bc5c6 | 272 | switch (chan->mode) { |
af6bcd82 | 273 | case L2CAP_MODE_BASIC: |
38319713 | 274 | case L2CAP_MODE_LE_FLOWCTL: |
af6bcd82 GP |
275 | break; |
276 | case L2CAP_MODE_ERTM: | |
277 | case L2CAP_MODE_STREAMING: | |
278 | if (!disable_ertm) | |
279 | break; | |
280 | /* fall through */ | |
281 | default: | |
282 | err = -ENOTSUPP; | |
283 | goto done; | |
284 | } | |
285 | ||
af6bcd82 GP |
286 | sk->sk_max_ack_backlog = backlog; |
287 | sk->sk_ack_backlog = 0; | |
89bc500e GP |
288 | |
289 | chan->state = BT_LISTEN; | |
af6bcd82 GP |
290 | sk->sk_state = BT_LISTEN; |
291 | ||
292 | done: | |
293 | release_sock(sk); | |
294 | return err; | |
295 | } | |
296 | ||
2d792818 GP |
297 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, |
298 | int flags) | |
c47b7c72 GP |
299 | { |
300 | DECLARE_WAITQUEUE(wait, current); | |
301 | struct sock *sk = sock->sk, *nsk; | |
302 | long timeo; | |
303 | int err = 0; | |
304 | ||
305 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
306 | ||
c47b7c72 GP |
307 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
308 | ||
309 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
310 | ||
311 | /* Wait for an incoming connection. (wake-one). */ | |
312 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
f9a3c20a | 313 | while (1) { |
c47b7c72 | 314 | set_current_state(TASK_INTERRUPTIBLE); |
f9a3c20a PH |
315 | |
316 | if (sk->sk_state != BT_LISTEN) { | |
317 | err = -EBADFD; | |
c47b7c72 GP |
318 | break; |
319 | } | |
320 | ||
f9a3c20a PH |
321 | nsk = bt_accept_dequeue(sk, newsock); |
322 | if (nsk) | |
323 | break; | |
c47b7c72 | 324 | |
f9a3c20a PH |
325 | if (!timeo) { |
326 | err = -EAGAIN; | |
c47b7c72 GP |
327 | break; |
328 | } | |
329 | ||
330 | if (signal_pending(current)) { | |
331 | err = sock_intr_errno(timeo); | |
332 | break; | |
333 | } | |
f9a3c20a PH |
334 | |
335 | release_sock(sk); | |
336 | timeo = schedule_timeout(timeo); | |
337 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
c47b7c72 | 338 | } |
f9a3c20a | 339 | __set_current_state(TASK_RUNNING); |
c47b7c72 GP |
340 | remove_wait_queue(sk_sleep(sk), &wait); |
341 | ||
342 | if (err) | |
343 | goto done; | |
344 | ||
345 | newsock->state = SS_CONNECTED; | |
346 | ||
347 | BT_DBG("new socket %p", nsk); | |
348 | ||
349 | done: | |
350 | release_sock(sk); | |
351 | return err; | |
352 | } | |
353 | ||
2d792818 GP |
354 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, |
355 | int *len, int peer) | |
d7175d55 GP |
356 | { |
357 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
358 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 359 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
d7175d55 GP |
360 | |
361 | BT_DBG("sock %p, sk %p", sock, sk); | |
362 | ||
e8b1ab9e | 363 | if (peer && sk->sk_state != BT_CONNECTED && |
bf19d51b JH |
364 | sk->sk_state != BT_CONNECT && sk->sk_state != BT_CONNECT2 && |
365 | sk->sk_state != BT_CONFIG) | |
b783fbc3 JH |
366 | return -ENOTCONN; |
367 | ||
792039c7 | 368 | memset(la, 0, sizeof(struct sockaddr_l2)); |
d7175d55 GP |
369 | addr->sa_family = AF_BLUETOOTH; |
370 | *len = sizeof(struct sockaddr_l2); | |
371 | ||
d7e5e76b JH |
372 | la->l2_psm = chan->psm; |
373 | ||
d7175d55 | 374 | if (peer) { |
7eafc59e | 375 | bacpy(&la->l2_bdaddr, &chan->dst); |
fe4128e0 | 376 | la->l2_cid = cpu_to_le16(chan->dcid); |
4f1654e0 | 377 | la->l2_bdaddr_type = chan->dst_type; |
d7175d55 | 378 | } else { |
7eafc59e | 379 | bacpy(&la->l2_bdaddr, &chan->src); |
fe4128e0 | 380 | la->l2_cid = cpu_to_le16(chan->scid); |
4f1654e0 | 381 | la->l2_bdaddr_type = chan->src_type; |
d7175d55 GP |
382 | } |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
2d792818 GP |
387 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, |
388 | char __user *optval, int __user *optlen) | |
99f4808d GP |
389 | { |
390 | struct sock *sk = sock->sk; | |
4343478f | 391 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d GP |
392 | struct l2cap_options opts; |
393 | struct l2cap_conninfo cinfo; | |
394 | int len, err = 0; | |
395 | u32 opt; | |
396 | ||
397 | BT_DBG("sk %p", sk); | |
398 | ||
399 | if (get_user(len, optlen)) | |
400 | return -EFAULT; | |
401 | ||
402 | lock_sock(sk); | |
403 | ||
404 | switch (optname) { | |
405 | case L2CAP_OPTIONS: | |
64b4f8dc JH |
406 | /* LE sockets should use BT_SNDMTU/BT_RCVMTU, but since |
407 | * legacy ATT code depends on getsockopt for | |
408 | * L2CAP_OPTIONS we need to let this pass. | |
409 | */ | |
410 | if (bdaddr_type_is_le(chan->src_type) && | |
411 | chan->scid != L2CAP_CID_ATT) { | |
412 | err = -EINVAL; | |
413 | break; | |
414 | } | |
415 | ||
e3fb592b | 416 | memset(&opts, 0, sizeof(opts)); |
0c1bc5c6 GP |
417 | opts.imtu = chan->imtu; |
418 | opts.omtu = chan->omtu; | |
419 | opts.flush_to = chan->flush_to; | |
420 | opts.mode = chan->mode; | |
47d1ec61 GP |
421 | opts.fcs = chan->fcs; |
422 | opts.max_tx = chan->max_tx; | |
6327eb98 | 423 | opts.txwin_size = chan->tx_win; |
99f4808d GP |
424 | |
425 | len = min_t(unsigned int, len, sizeof(opts)); | |
426 | if (copy_to_user(optval, (char *) &opts, len)) | |
427 | err = -EFAULT; | |
428 | ||
429 | break; | |
430 | ||
431 | case L2CAP_LM: | |
4343478f | 432 | switch (chan->sec_level) { |
99f4808d GP |
433 | case BT_SECURITY_LOW: |
434 | opt = L2CAP_LM_AUTH; | |
435 | break; | |
436 | case BT_SECURITY_MEDIUM: | |
437 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
438 | break; | |
439 | case BT_SECURITY_HIGH: | |
440 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
2d792818 | 441 | L2CAP_LM_SECURE; |
99f4808d | 442 | break; |
7d513e92 MH |
443 | case BT_SECURITY_FIPS: |
444 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
445 | L2CAP_LM_SECURE | L2CAP_LM_FIPS; | |
446 | break; | |
99f4808d GP |
447 | default: |
448 | opt = 0; | |
449 | break; | |
450 | } | |
451 | ||
43bd0f32 | 452 | if (test_bit(FLAG_ROLE_SWITCH, &chan->flags)) |
99f4808d GP |
453 | opt |= L2CAP_LM_MASTER; |
454 | ||
ecf61bdb | 455 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
99f4808d GP |
456 | opt |= L2CAP_LM_RELIABLE; |
457 | ||
458 | if (put_user(opt, (u32 __user *) optval)) | |
459 | err = -EFAULT; | |
7d513e92 | 460 | |
99f4808d GP |
461 | break; |
462 | ||
463 | case L2CAP_CONNINFO: | |
464 | if (sk->sk_state != BT_CONNECTED && | |
c5daa683 GP |
465 | !(sk->sk_state == BT_CONNECT2 && |
466 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { | |
99f4808d GP |
467 | err = -ENOTCONN; |
468 | break; | |
469 | } | |
470 | ||
8d03e971 | 471 | memset(&cinfo, 0, sizeof(cinfo)); |
8c1d787b GP |
472 | cinfo.hci_handle = chan->conn->hcon->handle; |
473 | memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); | |
99f4808d GP |
474 | |
475 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
476 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
477 | err = -EFAULT; | |
478 | ||
479 | break; | |
480 | ||
481 | default: | |
482 | err = -ENOPROTOOPT; | |
483 | break; | |
484 | } | |
485 | ||
486 | release_sock(sk); | |
487 | return err; | |
488 | } | |
489 | ||
2d792818 GP |
490 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, |
491 | char __user *optval, int __user *optlen) | |
99f4808d GP |
492 | { |
493 | struct sock *sk = sock->sk; | |
4343478f | 494 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d | 495 | struct bt_security sec; |
14b12d0b | 496 | struct bt_power pwr; |
99f4808d GP |
497 | int len, err = 0; |
498 | ||
499 | BT_DBG("sk %p", sk); | |
500 | ||
501 | if (level == SOL_L2CAP) | |
502 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
503 | ||
504 | if (level != SOL_BLUETOOTH) | |
505 | return -ENOPROTOOPT; | |
506 | ||
507 | if (get_user(len, optlen)) | |
508 | return -EFAULT; | |
509 | ||
510 | lock_sock(sk); | |
511 | ||
512 | switch (optname) { | |
513 | case BT_SECURITY: | |
715ec005 | 514 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
e0c888ad | 515 | chan->chan_type != L2CAP_CHAN_FIXED && |
2d792818 | 516 | chan->chan_type != L2CAP_CHAN_RAW) { |
99f4808d GP |
517 | err = -EINVAL; |
518 | break; | |
519 | } | |
520 | ||
8f360119 | 521 | memset(&sec, 0, sizeof(sec)); |
85e34368 | 522 | if (chan->conn) { |
c6585a4d | 523 | sec.level = chan->conn->hcon->sec_level; |
99f4808d | 524 | |
85e34368 AE |
525 | if (sk->sk_state == BT_CONNECTED) |
526 | sec.key_size = chan->conn->hcon->enc_key_size; | |
527 | } else { | |
528 | sec.level = chan->sec_level; | |
529 | } | |
8f360119 | 530 | |
99f4808d GP |
531 | len = min_t(unsigned int, len, sizeof(sec)); |
532 | if (copy_to_user(optval, (char *) &sec, len)) | |
533 | err = -EFAULT; | |
534 | ||
535 | break; | |
536 | ||
537 | case BT_DEFER_SETUP: | |
538 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
539 | err = -EINVAL; | |
540 | break; | |
541 | } | |
542 | ||
c5daa683 GP |
543 | if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), |
544 | (u32 __user *) optval)) | |
99f4808d GP |
545 | err = -EFAULT; |
546 | ||
547 | break; | |
548 | ||
549 | case BT_FLUSHABLE: | |
d57b0e8b | 550 | if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags), |
2d792818 | 551 | (u32 __user *) optval)) |
99f4808d GP |
552 | err = -EFAULT; |
553 | ||
554 | break; | |
555 | ||
14b12d0b JG |
556 | case BT_POWER: |
557 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
2d792818 | 558 | && sk->sk_type != SOCK_RAW) { |
14b12d0b JG |
559 | err = -EINVAL; |
560 | break; | |
561 | } | |
562 | ||
15770b1a | 563 | pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
14b12d0b JG |
564 | |
565 | len = min_t(unsigned int, len, sizeof(pwr)); | |
566 | if (copy_to_user(optval, (char *) &pwr, len)) | |
567 | err = -EFAULT; | |
568 | ||
569 | break; | |
570 | ||
2ea66482 | 571 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
572 | if (put_user(chan->chan_policy, (u32 __user *) optval)) |
573 | err = -EFAULT; | |
574 | break; | |
575 | ||
1f435424 | 576 | case BT_SNDMTU: |
1f435424 JH |
577 | if (!bdaddr_type_is_le(chan->src_type)) { |
578 | err = -EINVAL; | |
579 | break; | |
580 | } | |
581 | ||
582 | if (sk->sk_state != BT_CONNECTED) { | |
583 | err = -ENOTCONN; | |
584 | break; | |
585 | } | |
586 | ||
587 | if (put_user(chan->omtu, (u16 __user *) optval)) | |
588 | err = -EFAULT; | |
589 | break; | |
590 | ||
591 | case BT_RCVMTU: | |
1f435424 JH |
592 | if (!bdaddr_type_is_le(chan->src_type)) { |
593 | err = -EINVAL; | |
594 | break; | |
595 | } | |
596 | ||
597 | if (put_user(chan->imtu, (u16 __user *) optval)) | |
598 | err = -EFAULT; | |
599 | break; | |
600 | ||
99f4808d GP |
601 | default: |
602 | err = -ENOPROTOOPT; | |
603 | break; | |
604 | } | |
605 | ||
606 | release_sock(sk); | |
607 | return err; | |
608 | } | |
609 | ||
682877c3 AG |
610 | static bool l2cap_valid_mtu(struct l2cap_chan *chan, u16 mtu) |
611 | { | |
612 | switch (chan->scid) { | |
073d1cf3 | 613 | case L2CAP_CID_ATT: |
8c3a4f00 | 614 | if (mtu < L2CAP_LE_MIN_MTU) |
682877c3 AG |
615 | return false; |
616 | break; | |
617 | ||
618 | default: | |
619 | if (mtu < L2CAP_DEFAULT_MIN_MTU) | |
620 | return false; | |
621 | } | |
622 | ||
623 | return true; | |
624 | } | |
625 | ||
2d792818 GP |
626 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, |
627 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
628 | { |
629 | struct sock *sk = sock->sk; | |
b4450035 | 630 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 GP |
631 | struct l2cap_options opts; |
632 | int len, err = 0; | |
633 | u32 opt; | |
634 | ||
635 | BT_DBG("sk %p", sk); | |
636 | ||
637 | lock_sock(sk); | |
638 | ||
639 | switch (optname) { | |
640 | case L2CAP_OPTIONS: | |
64b4f8dc JH |
641 | if (bdaddr_type_is_le(chan->src_type)) { |
642 | err = -EINVAL; | |
643 | break; | |
644 | } | |
645 | ||
33575df7 GP |
646 | if (sk->sk_state == BT_CONNECTED) { |
647 | err = -EINVAL; | |
648 | break; | |
649 | } | |
650 | ||
0c1bc5c6 GP |
651 | opts.imtu = chan->imtu; |
652 | opts.omtu = chan->omtu; | |
653 | opts.flush_to = chan->flush_to; | |
654 | opts.mode = chan->mode; | |
47d1ec61 GP |
655 | opts.fcs = chan->fcs; |
656 | opts.max_tx = chan->max_tx; | |
6327eb98 | 657 | opts.txwin_size = chan->tx_win; |
33575df7 GP |
658 | |
659 | len = min_t(unsigned int, sizeof(opts), optlen); | |
660 | if (copy_from_user((char *) &opts, optval, len)) { | |
661 | err = -EFAULT; | |
662 | break; | |
663 | } | |
664 | ||
6327eb98 | 665 | if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) { |
33575df7 GP |
666 | err = -EINVAL; |
667 | break; | |
668 | } | |
669 | ||
682877c3 AG |
670 | if (!l2cap_valid_mtu(chan, opts.imtu)) { |
671 | err = -EINVAL; | |
672 | break; | |
673 | } | |
674 | ||
0c1bc5c6 GP |
675 | chan->mode = opts.mode; |
676 | switch (chan->mode) { | |
38319713 JH |
677 | case L2CAP_MODE_LE_FLOWCTL: |
678 | break; | |
33575df7 | 679 | case L2CAP_MODE_BASIC: |
c1360a1c | 680 | clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
33575df7 GP |
681 | break; |
682 | case L2CAP_MODE_ERTM: | |
683 | case L2CAP_MODE_STREAMING: | |
684 | if (!disable_ertm) | |
685 | break; | |
686 | /* fall through */ | |
687 | default: | |
688 | err = -EINVAL; | |
689 | break; | |
690 | } | |
691 | ||
0c1bc5c6 GP |
692 | chan->imtu = opts.imtu; |
693 | chan->omtu = opts.omtu; | |
47d1ec61 GP |
694 | chan->fcs = opts.fcs; |
695 | chan->max_tx = opts.max_tx; | |
6327eb98 | 696 | chan->tx_win = opts.txwin_size; |
12d59781 | 697 | chan->flush_to = opts.flush_to; |
33575df7 GP |
698 | break; |
699 | ||
700 | case L2CAP_LM: | |
701 | if (get_user(opt, (u32 __user *) optval)) { | |
702 | err = -EFAULT; | |
703 | break; | |
704 | } | |
705 | ||
7d513e92 MH |
706 | if (opt & L2CAP_LM_FIPS) { |
707 | err = -EINVAL; | |
708 | break; | |
709 | } | |
710 | ||
33575df7 | 711 | if (opt & L2CAP_LM_AUTH) |
4343478f | 712 | chan->sec_level = BT_SECURITY_LOW; |
33575df7 | 713 | if (opt & L2CAP_LM_ENCRYPT) |
4343478f | 714 | chan->sec_level = BT_SECURITY_MEDIUM; |
33575df7 | 715 | if (opt & L2CAP_LM_SECURE) |
4343478f | 716 | chan->sec_level = BT_SECURITY_HIGH; |
33575df7 | 717 | |
43bd0f32 AE |
718 | if (opt & L2CAP_LM_MASTER) |
719 | set_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
720 | else | |
721 | clear_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
ecf61bdb AE |
722 | |
723 | if (opt & L2CAP_LM_RELIABLE) | |
724 | set_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
725 | else | |
726 | clear_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
33575df7 GP |
727 | break; |
728 | ||
729 | default: | |
730 | err = -ENOPROTOOPT; | |
731 | break; | |
732 | } | |
733 | ||
734 | release_sock(sk); | |
735 | return err; | |
736 | } | |
737 | ||
2d792818 GP |
738 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, |
739 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
740 | { |
741 | struct sock *sk = sock->sk; | |
4343478f | 742 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 | 743 | struct bt_security sec; |
14b12d0b | 744 | struct bt_power pwr; |
f1cb9af5 | 745 | struct l2cap_conn *conn; |
33575df7 GP |
746 | int len, err = 0; |
747 | u32 opt; | |
748 | ||
749 | BT_DBG("sk %p", sk); | |
750 | ||
751 | if (level == SOL_L2CAP) | |
752 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
753 | ||
754 | if (level != SOL_BLUETOOTH) | |
755 | return -ENOPROTOOPT; | |
756 | ||
757 | lock_sock(sk); | |
758 | ||
759 | switch (optname) { | |
760 | case BT_SECURITY: | |
715ec005 | 761 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
e0c888ad | 762 | chan->chan_type != L2CAP_CHAN_FIXED && |
2d792818 | 763 | chan->chan_type != L2CAP_CHAN_RAW) { |
33575df7 GP |
764 | err = -EINVAL; |
765 | break; | |
766 | } | |
767 | ||
768 | sec.level = BT_SECURITY_LOW; | |
769 | ||
770 | len = min_t(unsigned int, sizeof(sec), optlen); | |
771 | if (copy_from_user((char *) &sec, optval, len)) { | |
772 | err = -EFAULT; | |
773 | break; | |
774 | } | |
775 | ||
776 | if (sec.level < BT_SECURITY_LOW || | |
2d792818 | 777 | sec.level > BT_SECURITY_HIGH) { |
33575df7 GP |
778 | err = -EINVAL; |
779 | break; | |
780 | } | |
781 | ||
4343478f | 782 | chan->sec_level = sec.level; |
f1cb9af5 | 783 | |
0bee1d60 GP |
784 | if (!chan->conn) |
785 | break; | |
786 | ||
f1cb9af5 | 787 | conn = chan->conn; |
0bee1d60 GP |
788 | |
789 | /*change security for LE channels */ | |
073d1cf3 | 790 | if (chan->scid == L2CAP_CID_ATT) { |
cc110922 | 791 | if (smp_conn_security(conn->hcon, sec.level)) |
f1cb9af5 | 792 | break; |
f1cb9af5 | 793 | sk->sk_state = BT_CONFIG; |
3542b854 | 794 | chan->state = BT_CONFIG; |
0bee1d60 | 795 | |
a7d7723a GP |
796 | /* or for ACL link */ |
797 | } else if ((sk->sk_state == BT_CONNECT2 && | |
2d792818 | 798 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) || |
a7d7723a | 799 | sk->sk_state == BT_CONNECTED) { |
e7cafc45 | 800 | if (!l2cap_chan_check_security(chan, true)) |
c5daa683 | 801 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
a7d7723a GP |
802 | else |
803 | sk->sk_state_change(sk); | |
0bee1d60 GP |
804 | } else { |
805 | err = -EINVAL; | |
f1cb9af5 | 806 | } |
33575df7 GP |
807 | break; |
808 | ||
809 | case BT_DEFER_SETUP: | |
810 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
811 | err = -EINVAL; | |
812 | break; | |
813 | } | |
814 | ||
815 | if (get_user(opt, (u32 __user *) optval)) { | |
816 | err = -EFAULT; | |
817 | break; | |
818 | } | |
819 | ||
bdc25783 | 820 | if (opt) { |
c5daa683 | 821 | set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); |
bdc25783 MH |
822 | set_bit(FLAG_DEFER_SETUP, &chan->flags); |
823 | } else { | |
c5daa683 | 824 | clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); |
bdc25783 MH |
825 | clear_bit(FLAG_DEFER_SETUP, &chan->flags); |
826 | } | |
33575df7 GP |
827 | break; |
828 | ||
829 | case BT_FLUSHABLE: | |
830 | if (get_user(opt, (u32 __user *) optval)) { | |
831 | err = -EFAULT; | |
832 | break; | |
833 | } | |
834 | ||
835 | if (opt > BT_FLUSHABLE_ON) { | |
836 | err = -EINVAL; | |
837 | break; | |
838 | } | |
839 | ||
840 | if (opt == BT_FLUSHABLE_OFF) { | |
c1f23a2b | 841 | conn = chan->conn; |
25985edc | 842 | /* proceed further only when we have l2cap_conn and |
33575df7 GP |
843 | No Flush support in the LM */ |
844 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { | |
845 | err = -EINVAL; | |
846 | break; | |
847 | } | |
848 | } | |
849 | ||
d57b0e8b AE |
850 | if (opt) |
851 | set_bit(FLAG_FLUSHABLE, &chan->flags); | |
852 | else | |
853 | clear_bit(FLAG_FLUSHABLE, &chan->flags); | |
33575df7 GP |
854 | break; |
855 | ||
14b12d0b JG |
856 | case BT_POWER: |
857 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && | |
2d792818 | 858 | chan->chan_type != L2CAP_CHAN_RAW) { |
14b12d0b JG |
859 | err = -EINVAL; |
860 | break; | |
861 | } | |
862 | ||
863 | pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; | |
864 | ||
865 | len = min_t(unsigned int, sizeof(pwr), optlen); | |
866 | if (copy_from_user((char *) &pwr, optval, len)) { | |
867 | err = -EFAULT; | |
868 | break; | |
869 | } | |
15770b1a AE |
870 | |
871 | if (pwr.force_active) | |
872 | set_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
873 | else | |
874 | clear_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
14b12d0b JG |
875 | break; |
876 | ||
2ea66482 | 877 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
878 | if (get_user(opt, (u32 __user *) optval)) { |
879 | err = -EFAULT; | |
880 | break; | |
881 | } | |
882 | ||
883 | if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) { | |
884 | err = -EINVAL; | |
885 | break; | |
886 | } | |
887 | ||
888 | if (chan->mode != L2CAP_MODE_ERTM && | |
2d792818 | 889 | chan->mode != L2CAP_MODE_STREAMING) { |
2ea66482 MM |
890 | err = -EOPNOTSUPP; |
891 | break; | |
892 | } | |
893 | ||
894 | chan->chan_policy = (u8) opt; | |
3f7a56c4 MM |
895 | |
896 | if (sk->sk_state == BT_CONNECTED && | |
897 | chan->move_role == L2CAP_MOVE_ROLE_NONE) | |
898 | l2cap_move_start(chan); | |
899 | ||
14b12d0b JG |
900 | break; |
901 | ||
1f435424 | 902 | case BT_SNDMTU: |
1f435424 JH |
903 | if (!bdaddr_type_is_le(chan->src_type)) { |
904 | err = -EINVAL; | |
905 | break; | |
906 | } | |
907 | ||
908 | /* Setting is not supported as it's the remote side that | |
909 | * decides this. | |
910 | */ | |
911 | err = -EPERM; | |
912 | break; | |
913 | ||
914 | case BT_RCVMTU: | |
1f435424 JH |
915 | if (!bdaddr_type_is_le(chan->src_type)) { |
916 | err = -EINVAL; | |
917 | break; | |
918 | } | |
919 | ||
920 | if (sk->sk_state == BT_CONNECTED) { | |
921 | err = -EISCONN; | |
922 | break; | |
923 | } | |
924 | ||
925 | if (get_user(opt, (u32 __user *) optval)) { | |
926 | err = -EFAULT; | |
927 | break; | |
928 | } | |
929 | ||
930 | chan->imtu = opt; | |
931 | break; | |
932 | ||
33575df7 GP |
933 | default: |
934 | err = -ENOPROTOOPT; | |
935 | break; | |
936 | } | |
937 | ||
938 | release_sock(sk); | |
939 | return err; | |
940 | } | |
fd83ccdb | 941 | |
2d792818 GP |
942 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
943 | struct msghdr *msg, size_t len) | |
fd83ccdb GP |
944 | { |
945 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 946 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb GP |
947 | int err; |
948 | ||
949 | BT_DBG("sock %p, sk %p", sock, sk); | |
950 | ||
951 | err = sock_error(sk); | |
952 | if (err) | |
953 | return err; | |
954 | ||
955 | if (msg->msg_flags & MSG_OOB) | |
956 | return -EOPNOTSUPP; | |
957 | ||
a6a5568c | 958 | if (sk->sk_state != BT_CONNECTED) |
9a91a04a | 959 | return -ENOTCONN; |
fd83ccdb | 960 | |
e793dcf0 JH |
961 | lock_sock(sk); |
962 | err = bt_sock_wait_ready(sk, msg->msg_flags); | |
963 | release_sock(sk); | |
964 | if (err) | |
965 | return err; | |
966 | ||
a6a5568c | 967 | l2cap_chan_lock(chan); |
8d46321c | 968 | err = l2cap_chan_send(chan, msg, len); |
a6a5568c | 969 | l2cap_chan_unlock(chan); |
fd83ccdb | 970 | |
fd83ccdb GP |
971 | return err; |
972 | } | |
33575df7 | 973 | |
2d792818 GP |
974 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
975 | struct msghdr *msg, size_t len, int flags) | |
68983259 GP |
976 | { |
977 | struct sock *sk = sock->sk; | |
e328140f MM |
978 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
979 | int err; | |
68983259 GP |
980 | |
981 | lock_sock(sk); | |
982 | ||
c5daa683 GP |
983 | if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP, |
984 | &bt_sk(sk)->flags)) { | |
38319713 JH |
985 | if (bdaddr_type_is_le(pi->chan->src_type)) { |
986 | sk->sk_state = BT_CONNECTED; | |
987 | pi->chan->state = BT_CONNECTED; | |
988 | __l2cap_le_connect_rsp_defer(pi->chan); | |
989 | } else { | |
990 | sk->sk_state = BT_CONFIG; | |
991 | pi->chan->state = BT_CONFIG; | |
992 | __l2cap_connect_rsp_defer(pi->chan); | |
993 | } | |
8c1d787b | 994 | |
970871bc JH |
995 | err = 0; |
996 | goto done; | |
68983259 GP |
997 | } |
998 | ||
999 | release_sock(sk); | |
1000 | ||
1001 | if (sock->type == SOCK_STREAM) | |
e328140f MM |
1002 | err = bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); |
1003 | else | |
1004 | err = bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
1005 | ||
1006 | if (pi->chan->mode != L2CAP_MODE_ERTM) | |
1007 | return err; | |
1008 | ||
1009 | /* Attempt to put pending rx data in the socket buffer */ | |
1010 | ||
1011 | lock_sock(sk); | |
1012 | ||
1013 | if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state)) | |
1014 | goto done; | |
1015 | ||
1016 | if (pi->rx_busy_skb) { | |
1017 | if (!sock_queue_rcv_skb(sk, pi->rx_busy_skb)) | |
1018 | pi->rx_busy_skb = NULL; | |
1019 | else | |
1020 | goto done; | |
1021 | } | |
1022 | ||
1023 | /* Restore data flow when half of the receive buffer is | |
1024 | * available. This avoids resending large numbers of | |
1025 | * frames. | |
1026 | */ | |
1027 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1) | |
1028 | l2cap_chan_busy(pi->chan, 0); | |
68983259 | 1029 | |
e328140f MM |
1030 | done: |
1031 | release_sock(sk); | |
1032 | return err; | |
68983259 GP |
1033 | } |
1034 | ||
05fc1576 GP |
1035 | /* Kill socket (only if zapped and orphan) |
1036 | * Must be called on unlocked socket. | |
1037 | */ | |
ba3bd0ee | 1038 | static void l2cap_sock_kill(struct sock *sk) |
05fc1576 GP |
1039 | { |
1040 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
1041 | return; | |
1042 | ||
e05dcc32 | 1043 | BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state)); |
05fc1576 GP |
1044 | |
1045 | /* Kill poor orphan */ | |
6ff5abbf | 1046 | |
4af66c69 | 1047 | l2cap_chan_put(l2cap_pi(sk)->chan); |
05fc1576 GP |
1048 | sock_set_flag(sk, SOCK_DEAD); |
1049 | sock_put(sk); | |
1050 | } | |
1051 | ||
dc25306b GP |
1052 | static int __l2cap_wait_ack(struct sock *sk) |
1053 | { | |
1054 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
1055 | DECLARE_WAITQUEUE(wait, current); | |
1056 | int err = 0; | |
1057 | int timeo = HZ/5; | |
1058 | ||
1059 | add_wait_queue(sk_sleep(sk), &wait); | |
1060 | set_current_state(TASK_INTERRUPTIBLE); | |
1061 | while (chan->unacked_frames > 0 && chan->conn) { | |
1062 | if (!timeo) | |
1063 | timeo = HZ/5; | |
1064 | ||
1065 | if (signal_pending(current)) { | |
1066 | err = sock_intr_errno(timeo); | |
1067 | break; | |
1068 | } | |
1069 | ||
1070 | release_sock(sk); | |
1071 | timeo = schedule_timeout(timeo); | |
1072 | lock_sock(sk); | |
1073 | set_current_state(TASK_INTERRUPTIBLE); | |
1074 | ||
1075 | err = sock_error(sk); | |
1076 | if (err) | |
1077 | break; | |
1078 | } | |
1079 | set_current_state(TASK_RUNNING); | |
1080 | remove_wait_queue(sk_sleep(sk), &wait); | |
1081 | return err; | |
1082 | } | |
1083 | ||
dcba0dba GP |
1084 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
1085 | { | |
1086 | struct sock *sk = sock->sk; | |
7ddb6e0f | 1087 | struct l2cap_chan *chan; |
3df91ea2 | 1088 | struct l2cap_conn *conn; |
dcba0dba GP |
1089 | int err = 0; |
1090 | ||
1091 | BT_DBG("sock %p, sk %p", sock, sk); | |
1092 | ||
1093 | if (!sk) | |
1094 | return 0; | |
1095 | ||
7ddb6e0f | 1096 | chan = l2cap_pi(sk)->chan; |
3df91ea2 AE |
1097 | conn = chan->conn; |
1098 | ||
1099 | if (conn) | |
1100 | mutex_lock(&conn->chan_lock); | |
7ddb6e0f | 1101 | |
6be36555 | 1102 | l2cap_chan_lock(chan); |
dcba0dba | 1103 | lock_sock(sk); |
6be36555 | 1104 | |
dcba0dba | 1105 | if (!sk->sk_shutdown) { |
0c1bc5c6 | 1106 | if (chan->mode == L2CAP_MODE_ERTM) |
dcba0dba GP |
1107 | err = __l2cap_wait_ack(sk); |
1108 | ||
1109 | sk->sk_shutdown = SHUTDOWN_MASK; | |
3df91ea2 | 1110 | |
6be36555 | 1111 | release_sock(sk); |
0f852724 | 1112 | l2cap_chan_close(chan, 0); |
6be36555 | 1113 | lock_sock(sk); |
dcba0dba | 1114 | |
093facf3 VD |
1115 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime && |
1116 | !(current->flags & PF_EXITING)) | |
dcba0dba | 1117 | err = bt_sock_wait_state(sk, BT_CLOSED, |
2d792818 | 1118 | sk->sk_lingertime); |
dcba0dba GP |
1119 | } |
1120 | ||
1121 | if (!err && sk->sk_err) | |
1122 | err = -sk->sk_err; | |
1123 | ||
1124 | release_sock(sk); | |
6be36555 | 1125 | l2cap_chan_unlock(chan); |
3df91ea2 AE |
1126 | |
1127 | if (conn) | |
1128 | mutex_unlock(&conn->chan_lock); | |
1129 | ||
dcba0dba GP |
1130 | return err; |
1131 | } | |
1132 | ||
554f05bb GP |
1133 | static int l2cap_sock_release(struct socket *sock) |
1134 | { | |
1135 | struct sock *sk = sock->sk; | |
1136 | int err; | |
1137 | ||
1138 | BT_DBG("sock %p, sk %p", sock, sk); | |
1139 | ||
1140 | if (!sk) | |
1141 | return 0; | |
1142 | ||
5b28d95c MY |
1143 | bt_sock_unlink(&l2cap_sk_list, sk); |
1144 | ||
554f05bb GP |
1145 | err = l2cap_sock_shutdown(sock, 2); |
1146 | ||
1147 | sock_orphan(sk); | |
1148 | l2cap_sock_kill(sk); | |
1149 | return err; | |
1150 | } | |
1151 | ||
c0df7f6e AE |
1152 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
1153 | { | |
1154 | struct sock *sk; | |
1155 | ||
1156 | BT_DBG("parent %p", parent); | |
1157 | ||
1158 | /* Close not yet accepted channels */ | |
1159 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
1160 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
1161 | ||
1162 | l2cap_chan_lock(chan); | |
1163 | __clear_chan_timer(chan); | |
1164 | l2cap_chan_close(chan, ECONNRESET); | |
1165 | l2cap_chan_unlock(chan); | |
1166 | ||
1167 | l2cap_sock_kill(sk); | |
1168 | } | |
1169 | } | |
1170 | ||
80b98027 | 1171 | static struct l2cap_chan *l2cap_sock_new_connection_cb(struct l2cap_chan *chan) |
80808e43 | 1172 | { |
80b98027 | 1173 | struct sock *sk, *parent = chan->data; |
80808e43 | 1174 | |
8ffb9290 GP |
1175 | lock_sock(parent); |
1176 | ||
53826692 GP |
1177 | /* Check for backlog size */ |
1178 | if (sk_acceptq_is_full(parent)) { | |
1179 | BT_DBG("backlog full %d", parent->sk_ack_backlog); | |
8a96f3cd | 1180 | release_sock(parent); |
53826692 GP |
1181 | return NULL; |
1182 | } | |
1183 | ||
80808e43 | 1184 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, |
2d792818 | 1185 | GFP_ATOMIC); |
8a96f3cd JT |
1186 | if (!sk) { |
1187 | release_sock(parent); | |
80808e43 | 1188 | return NULL; |
8a96f3cd | 1189 | } |
80808e43 | 1190 | |
d22015aa OP |
1191 | bt_sock_reclassify_lock(sk, BTPROTO_L2CAP); |
1192 | ||
80808e43 GP |
1193 | l2cap_sock_init(sk, parent); |
1194 | ||
644912e1 GP |
1195 | bt_accept_enqueue(parent, sk); |
1196 | ||
8ffb9290 GP |
1197 | release_sock(parent); |
1198 | ||
80808e43 GP |
1199 | return l2cap_pi(sk)->chan; |
1200 | } | |
1201 | ||
80b98027 | 1202 | static int l2cap_sock_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) |
23070494 | 1203 | { |
80b98027 | 1204 | struct sock *sk = chan->data; |
84b34d98 | 1205 | int err; |
e328140f | 1206 | |
6be36555 AE |
1207 | lock_sock(sk); |
1208 | ||
84b34d98 | 1209 | if (l2cap_pi(sk)->rx_busy_skb) { |
6be36555 AE |
1210 | err = -ENOMEM; |
1211 | goto done; | |
1212 | } | |
e328140f MM |
1213 | |
1214 | err = sock_queue_rcv_skb(sk, skb); | |
1215 | ||
1216 | /* For ERTM, handle one skb that doesn't fit into the recv | |
1217 | * buffer. This is important to do because the data frames | |
1218 | * have already been acked, so the skb cannot be discarded. | |
1219 | * | |
1220 | * Notify the l2cap core that the buffer is full, so the | |
1221 | * LOCAL_BUSY state is entered and no more frames are | |
1222 | * acked and reassembled until there is buffer space | |
1223 | * available. | |
1224 | */ | |
84b34d98 MH |
1225 | if (err < 0 && chan->mode == L2CAP_MODE_ERTM) { |
1226 | l2cap_pi(sk)->rx_busy_skb = skb; | |
1227 | l2cap_chan_busy(chan, 1); | |
e328140f MM |
1228 | err = 0; |
1229 | } | |
23070494 | 1230 | |
6be36555 AE |
1231 | done: |
1232 | release_sock(sk); | |
1233 | ||
e328140f | 1234 | return err; |
23070494 GP |
1235 | } |
1236 | ||
80b98027 | 1237 | static void l2cap_sock_close_cb(struct l2cap_chan *chan) |
ba3bd0ee | 1238 | { |
80b98027 | 1239 | struct sock *sk = chan->data; |
ba3bd0ee GP |
1240 | |
1241 | l2cap_sock_kill(sk); | |
1242 | } | |
1243 | ||
c0df7f6e AE |
1244 | static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err) |
1245 | { | |
1246 | struct sock *sk = chan->data; | |
1247 | struct sock *parent; | |
1248 | ||
1249 | lock_sock(sk); | |
1250 | ||
1251 | parent = bt_sk(sk)->parent; | |
1252 | ||
1253 | sock_set_flag(sk, SOCK_ZAPPED); | |
1254 | ||
1255 | switch (chan->state) { | |
1256 | case BT_OPEN: | |
1257 | case BT_BOUND: | |
1258 | case BT_CLOSED: | |
1259 | break; | |
1260 | case BT_LISTEN: | |
1261 | l2cap_sock_cleanup_listen(sk); | |
1262 | sk->sk_state = BT_CLOSED; | |
1263 | chan->state = BT_CLOSED; | |
1264 | ||
1265 | break; | |
1266 | default: | |
1267 | sk->sk_state = BT_CLOSED; | |
1268 | chan->state = BT_CLOSED; | |
1269 | ||
1270 | sk->sk_err = err; | |
1271 | ||
1272 | if (parent) { | |
1273 | bt_accept_unlink(sk); | |
676d2369 | 1274 | parent->sk_data_ready(parent); |
c0df7f6e AE |
1275 | } else { |
1276 | sk->sk_state_change(sk); | |
1277 | } | |
1278 | ||
1279 | break; | |
1280 | } | |
1281 | ||
1282 | release_sock(sk); | |
1283 | } | |
1284 | ||
53f52121 GP |
1285 | static void l2cap_sock_state_change_cb(struct l2cap_chan *chan, int state, |
1286 | int err) | |
89bc500e | 1287 | { |
80b98027 | 1288 | struct sock *sk = chan->data; |
89bc500e GP |
1289 | |
1290 | sk->sk_state = state; | |
53f52121 GP |
1291 | |
1292 | if (err) | |
1293 | sk->sk_err = err; | |
89bc500e GP |
1294 | } |
1295 | ||
2f7719ce | 1296 | static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan, |
d9fbd02b | 1297 | unsigned long hdr_len, |
90338947 | 1298 | unsigned long len, int nb) |
2f7719ce | 1299 | { |
0f2c6153 | 1300 | struct sock *sk = chan->data; |
90338947 GP |
1301 | struct sk_buff *skb; |
1302 | int err; | |
1303 | ||
a6a5568c | 1304 | l2cap_chan_unlock(chan); |
d9fbd02b | 1305 | skb = bt_skb_send_alloc(sk, hdr_len + len, nb, &err); |
a6a5568c MM |
1306 | l2cap_chan_lock(chan); |
1307 | ||
90338947 GP |
1308 | if (!skb) |
1309 | return ERR_PTR(err); | |
2f7719ce | 1310 | |
8d46321c MH |
1311 | skb->priority = sk->sk_priority; |
1312 | ||
0e790c64 GP |
1313 | bt_cb(skb)->chan = chan; |
1314 | ||
90338947 | 1315 | return skb; |
2f7719ce AE |
1316 | } |
1317 | ||
0498878b JR |
1318 | static int l2cap_sock_memcpy_fromiovec_cb(struct l2cap_chan *chan, |
1319 | unsigned char *kdata, | |
1320 | struct iovec *iov, int len) | |
1321 | { | |
1322 | return memcpy_fromiovec(kdata, iov, len); | |
1323 | } | |
1324 | ||
54a59aa2 AE |
1325 | static void l2cap_sock_ready_cb(struct l2cap_chan *chan) |
1326 | { | |
1327 | struct sock *sk = chan->data; | |
1328 | struct sock *parent; | |
1329 | ||
1330 | lock_sock(sk); | |
1331 | ||
1332 | parent = bt_sk(sk)->parent; | |
1333 | ||
1334 | BT_DBG("sk %p, parent %p", sk, parent); | |
1335 | ||
1336 | sk->sk_state = BT_CONNECTED; | |
1337 | sk->sk_state_change(sk); | |
1338 | ||
1339 | if (parent) | |
676d2369 | 1340 | parent->sk_data_ready(parent); |
54a59aa2 AE |
1341 | |
1342 | release_sock(sk); | |
1343 | } | |
1344 | ||
2dc4e510 GP |
1345 | static void l2cap_sock_defer_cb(struct l2cap_chan *chan) |
1346 | { | |
acdcabf5 GP |
1347 | struct sock *parent, *sk = chan->data; |
1348 | ||
1349 | lock_sock(sk); | |
2dc4e510 | 1350 | |
acdcabf5 | 1351 | parent = bt_sk(sk)->parent; |
2dc4e510 | 1352 | if (parent) |
676d2369 | 1353 | parent->sk_data_ready(parent); |
acdcabf5 GP |
1354 | |
1355 | release_sock(sk); | |
2dc4e510 GP |
1356 | } |
1357 | ||
d97c899b MH |
1358 | static void l2cap_sock_resume_cb(struct l2cap_chan *chan) |
1359 | { | |
1360 | struct sock *sk = chan->data; | |
1361 | ||
1362 | clear_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); | |
1363 | sk->sk_state_change(sk); | |
1364 | } | |
1365 | ||
5ec1bbe5 GP |
1366 | static void l2cap_sock_set_shutdown_cb(struct l2cap_chan *chan) |
1367 | { | |
1368 | struct sock *sk = chan->data; | |
1369 | ||
1370 | lock_sock(sk); | |
1371 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1372 | release_sock(sk); | |
1373 | } | |
1374 | ||
8d836d71 GP |
1375 | static long l2cap_sock_get_sndtimeo_cb(struct l2cap_chan *chan) |
1376 | { | |
1377 | struct sock *sk = chan->data; | |
1378 | ||
1379 | return sk->sk_sndtimeo; | |
1380 | } | |
1381 | ||
837776f7 JH |
1382 | static void l2cap_sock_suspend_cb(struct l2cap_chan *chan) |
1383 | { | |
1384 | struct sock *sk = chan->data; | |
1385 | ||
1386 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); | |
1387 | sk->sk_state_change(sk); | |
1388 | } | |
1389 | ||
67f86a45 | 1390 | static const struct l2cap_ops l2cap_chan_ops = { |
0498878b JR |
1391 | .name = "L2CAP Socket Interface", |
1392 | .new_connection = l2cap_sock_new_connection_cb, | |
1393 | .recv = l2cap_sock_recv_cb, | |
1394 | .close = l2cap_sock_close_cb, | |
1395 | .teardown = l2cap_sock_teardown_cb, | |
1396 | .state_change = l2cap_sock_state_change_cb, | |
1397 | .ready = l2cap_sock_ready_cb, | |
1398 | .defer = l2cap_sock_defer_cb, | |
1399 | .resume = l2cap_sock_resume_cb, | |
1400 | .suspend = l2cap_sock_suspend_cb, | |
1401 | .set_shutdown = l2cap_sock_set_shutdown_cb, | |
1402 | .get_sndtimeo = l2cap_sock_get_sndtimeo_cb, | |
1403 | .alloc_skb = l2cap_sock_alloc_skb_cb, | |
1404 | .memcpy_fromiovec = l2cap_sock_memcpy_fromiovec_cb, | |
80808e43 GP |
1405 | }; |
1406 | ||
bb58f747 GP |
1407 | static void l2cap_sock_destruct(struct sock *sk) |
1408 | { | |
1409 | BT_DBG("sk %p", sk); | |
1410 | ||
23d3a869 SL |
1411 | if (l2cap_pi(sk)->chan) |
1412 | l2cap_chan_put(l2cap_pi(sk)->chan); | |
84b34d98 | 1413 | |
e328140f MM |
1414 | if (l2cap_pi(sk)->rx_busy_skb) { |
1415 | kfree_skb(l2cap_pi(sk)->rx_busy_skb); | |
1416 | l2cap_pi(sk)->rx_busy_skb = NULL; | |
1417 | } | |
1418 | ||
bb58f747 GP |
1419 | skb_queue_purge(&sk->sk_receive_queue); |
1420 | skb_queue_purge(&sk->sk_write_queue); | |
1421 | } | |
1422 | ||
2edf870d MH |
1423 | static void l2cap_skb_msg_name(struct sk_buff *skb, void *msg_name, |
1424 | int *msg_namelen) | |
1425 | { | |
342dfc30 | 1426 | DECLARE_SOCKADDR(struct sockaddr_l2 *, la, msg_name); |
2edf870d MH |
1427 | |
1428 | memset(la, 0, sizeof(struct sockaddr_l2)); | |
1429 | la->l2_family = AF_BLUETOOTH; | |
1430 | la->l2_psm = bt_cb(skb)->psm; | |
1431 | bacpy(&la->l2_bdaddr, &bt_cb(skb)->bdaddr); | |
1432 | ||
1433 | *msg_namelen = sizeof(struct sockaddr_l2); | |
1434 | } | |
1435 | ||
80808e43 | 1436 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747 | 1437 | { |
84b34d98 | 1438 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
bb58f747 GP |
1439 | |
1440 | BT_DBG("sk %p", sk); | |
1441 | ||
1442 | if (parent) { | |
b4450035 GP |
1443 | struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
1444 | ||
bb58f747 | 1445 | sk->sk_type = parent->sk_type; |
c5daa683 | 1446 | bt_sk(sk)->flags = bt_sk(parent)->flags; |
bb58f747 | 1447 | |
715ec005 | 1448 | chan->chan_type = pchan->chan_type; |
0c1bc5c6 GP |
1449 | chan->imtu = pchan->imtu; |
1450 | chan->omtu = pchan->omtu; | |
b4450035 | 1451 | chan->conf_state = pchan->conf_state; |
0c1bc5c6 | 1452 | chan->mode = pchan->mode; |
47d1ec61 GP |
1453 | chan->fcs = pchan->fcs; |
1454 | chan->max_tx = pchan->max_tx; | |
1455 | chan->tx_win = pchan->tx_win; | |
6b3c7104 | 1456 | chan->tx_win_max = pchan->tx_win_max; |
4343478f | 1457 | chan->sec_level = pchan->sec_level; |
d57b0e8b | 1458 | chan->flags = pchan->flags; |
0cd75f7e JH |
1459 | chan->tx_credits = pchan->tx_credits; |
1460 | chan->rx_credits = pchan->rx_credits; | |
6230c9b4 | 1461 | |
7a8e5a31 JH |
1462 | if (chan->chan_type == L2CAP_CHAN_FIXED) { |
1463 | chan->scid = pchan->scid; | |
1464 | chan->dcid = pchan->scid; | |
1465 | } | |
1466 | ||
6230c9b4 | 1467 | security_sk_clone(parent, sk); |
bb58f747 | 1468 | } else { |
715ec005 GP |
1469 | switch (sk->sk_type) { |
1470 | case SOCK_RAW: | |
1471 | chan->chan_type = L2CAP_CHAN_RAW; | |
1472 | break; | |
1473 | case SOCK_DGRAM: | |
1474 | chan->chan_type = L2CAP_CHAN_CONN_LESS; | |
2edf870d | 1475 | bt_sk(sk)->skb_msg_name = l2cap_skb_msg_name; |
715ec005 GP |
1476 | break; |
1477 | case SOCK_SEQPACKET: | |
1478 | case SOCK_STREAM: | |
1479 | chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; | |
1480 | break; | |
1481 | } | |
1482 | ||
0c1bc5c6 GP |
1483 | chan->imtu = L2CAP_DEFAULT_MTU; |
1484 | chan->omtu = 0; | |
bb58f747 | 1485 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c6 | 1486 | chan->mode = L2CAP_MODE_ERTM; |
c1360a1c | 1487 | set_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
bb58f747 | 1488 | } else { |
0c1bc5c6 | 1489 | chan->mode = L2CAP_MODE_BASIC; |
bb58f747 | 1490 | } |
bd4b1653 AE |
1491 | |
1492 | l2cap_chan_set_defaults(chan); | |
bb58f747 GP |
1493 | } |
1494 | ||
1495 | /* Default config options */ | |
0c1bc5c6 | 1496 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e43 GP |
1497 | |
1498 | chan->data = sk; | |
1499 | chan->ops = &l2cap_chan_ops; | |
bb58f747 GP |
1500 | } |
1501 | ||
1502 | static struct proto l2cap_proto = { | |
1503 | .name = "L2CAP", | |
1504 | .owner = THIS_MODULE, | |
1505 | .obj_size = sizeof(struct l2cap_pinfo) | |
1506 | }; | |
1507 | ||
2d792818 GP |
1508 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
1509 | int proto, gfp_t prio) | |
bb58f747 GP |
1510 | { |
1511 | struct sock *sk; | |
dc50a06d | 1512 | struct l2cap_chan *chan; |
bb58f747 GP |
1513 | |
1514 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); | |
1515 | if (!sk) | |
1516 | return NULL; | |
1517 | ||
1518 | sock_init_data(sock, sk); | |
1519 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
1520 | ||
1521 | sk->sk_destruct = l2cap_sock_destruct; | |
ba13ccd9 | 1522 | sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; |
bb58f747 GP |
1523 | |
1524 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1525 | ||
1526 | sk->sk_protocol = proto; | |
1527 | sk->sk_state = BT_OPEN; | |
1528 | ||
eef1d9b6 | 1529 | chan = l2cap_chan_create(); |
dc50a06d | 1530 | if (!chan) { |
49dfbb91 | 1531 | sk_free(sk); |
dc50a06d GP |
1532 | return NULL; |
1533 | } | |
1534 | ||
61d6ef3e MM |
1535 | l2cap_chan_hold(chan); |
1536 | ||
dc50a06d GP |
1537 | l2cap_pi(sk)->chan = chan; |
1538 | ||
bb58f747 GP |
1539 | return sk; |
1540 | } | |
1541 | ||
1542 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
1543 | int kern) | |
1544 | { | |
1545 | struct sock *sk; | |
1546 | ||
1547 | BT_DBG("sock %p", sock); | |
1548 | ||
1549 | sock->state = SS_UNCONNECTED; | |
1550 | ||
1551 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
2d792818 | 1552 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
bb58f747 GP |
1553 | return -ESOCKTNOSUPPORT; |
1554 | ||
1555 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
1556 | return -EPERM; | |
1557 | ||
1558 | sock->ops = &l2cap_sock_ops; | |
1559 | ||
1560 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); | |
1561 | if (!sk) | |
1562 | return -ENOMEM; | |
1563 | ||
1564 | l2cap_sock_init(sk, NULL); | |
5b28d95c | 1565 | bt_sock_link(&l2cap_sk_list, sk); |
bb58f747 GP |
1566 | return 0; |
1567 | } | |
1568 | ||
cf2f90f5 | 1569 | static const struct proto_ops l2cap_sock_ops = { |
65390587 GP |
1570 | .family = PF_BLUETOOTH, |
1571 | .owner = THIS_MODULE, | |
1572 | .release = l2cap_sock_release, | |
1573 | .bind = l2cap_sock_bind, | |
1574 | .connect = l2cap_sock_connect, | |
1575 | .listen = l2cap_sock_listen, | |
1576 | .accept = l2cap_sock_accept, | |
1577 | .getname = l2cap_sock_getname, | |
1578 | .sendmsg = l2cap_sock_sendmsg, | |
1579 | .recvmsg = l2cap_sock_recvmsg, | |
1580 | .poll = bt_sock_poll, | |
1581 | .ioctl = bt_sock_ioctl, | |
1582 | .mmap = sock_no_mmap, | |
1583 | .socketpair = sock_no_socketpair, | |
1584 | .shutdown = l2cap_sock_shutdown, | |
1585 | .setsockopt = l2cap_sock_setsockopt, | |
1586 | .getsockopt = l2cap_sock_getsockopt | |
1587 | }; | |
1588 | ||
bb58f747 GP |
1589 | static const struct net_proto_family l2cap_sock_family_ops = { |
1590 | .family = PF_BLUETOOTH, | |
1591 | .owner = THIS_MODULE, | |
1592 | .create = l2cap_sock_create, | |
1593 | }; | |
1594 | ||
1595 | int __init l2cap_init_sockets(void) | |
1596 | { | |
e2174ca4 | 1597 | int err; |
bb58f747 | 1598 | |
e2174ca4 GP |
1599 | err = proto_register(&l2cap_proto, 0); |
1600 | if (err < 0) | |
1601 | return err; | |
bb58f747 | 1602 | |
e2174ca4 | 1603 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
5b28d95c MY |
1604 | if (err < 0) { |
1605 | BT_ERR("L2CAP socket registration failed"); | |
e2174ca4 | 1606 | goto error; |
5b28d95c MY |
1607 | } |
1608 | ||
b0316615 | 1609 | err = bt_procfs_init(&init_net, "l2cap", &l2cap_sk_list, |
2d792818 | 1610 | NULL); |
5b28d95c MY |
1611 | if (err < 0) { |
1612 | BT_ERR("Failed to create L2CAP proc file"); | |
1613 | bt_sock_unregister(BTPROTO_L2CAP); | |
1614 | goto error; | |
1615 | } | |
bb58f747 | 1616 | |
e2174ca4 | 1617 | BT_INFO("L2CAP socket layer initialized"); |
bb58f747 | 1618 | |
e2174ca4 | 1619 | return 0; |
bb58f747 GP |
1620 | |
1621 | error: | |
e2174ca4 GP |
1622 | proto_unregister(&l2cap_proto); |
1623 | return err; | |
bb58f747 GP |
1624 | } |
1625 | ||
1626 | void l2cap_cleanup_sockets(void) | |
1627 | { | |
5b28d95c | 1628 | bt_procfs_cleanup(&init_net, "l2cap"); |
5e9d7f86 | 1629 | bt_sock_unregister(BTPROTO_L2CAP); |
e2174ca4 | 1630 | proto_unregister(&l2cap_proto); |
bb58f747 | 1631 | } |