Commit | Line | Data |
---|---|---|
bb58f747 GP |
1 | /* |
2 | BlueZ - Bluetooth protocol stack for Linux | |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> | |
5 | Copyright (C) 2010 Google Inc. | |
590051de | 6 | Copyright (C) 2011 ProFUSION Embedded Systems |
bb58f747 GP |
7 | |
8 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License version 2 as | |
12 | published by the Free Software Foundation; | |
13 | ||
14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
15 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
17 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
18 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES | |
19 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
20 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
21 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
22 | ||
23 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, | |
24 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
25 | SOFTWARE IS DISCLAIMED. | |
26 | */ | |
27 | ||
28 | /* Bluetooth L2CAP sockets. */ | |
29 | ||
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 | ||
bfe4655f | 102 | if (bdaddr_type_is_le(la.l2_bdaddr_type)) { |
bfe4655f | 103 | /* We only allow ATT user space socket */ |
9149761a | 104 | if (la.l2_cid && |
dcf4adbf | 105 | la.l2_cid != cpu_to_le16(L2CAP_CID_ATT)) |
bfe4655f JH |
106 | return -EINVAL; |
107 | } | |
108 | ||
af6bcd82 GP |
109 | lock_sock(sk); |
110 | ||
111 | if (sk->sk_state != BT_OPEN) { | |
112 | err = -EBADFD; | |
113 | goto done; | |
114 | } | |
115 | ||
116 | if (la.l2_psm) { | |
117 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
118 | ||
4946096d JH |
119 | if (la.l2_bdaddr_type == BDADDR_BREDR) |
120 | err = l2cap_validate_bredr_psm(psm); | |
121 | else | |
122 | err = l2cap_validate_le_psm(psm); | |
af6bcd82 | 123 | |
4946096d | 124 | if (err) |
af6bcd82 | 125 | goto done; |
af6bcd82 GP |
126 | } |
127 | ||
9e4425ff | 128 | if (la.l2_cid) |
6e4aff10 | 129 | err = l2cap_add_scid(chan, __le16_to_cpu(la.l2_cid)); |
9e4425ff GP |
130 | else |
131 | err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm); | |
af6bcd82 | 132 | |
9e4425ff GP |
133 | if (err < 0) |
134 | goto done; | |
af6bcd82 | 135 | |
6a974b50 | 136 | switch (chan->chan_type) { |
3124b843 MH |
137 | case L2CAP_CHAN_CONN_LESS: |
138 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_3DSP) | |
139 | chan->sec_level = BT_SECURITY_SDP; | |
140 | break; | |
6a974b50 MH |
141 | case L2CAP_CHAN_CONN_ORIENTED: |
142 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_SDP || | |
143 | __le16_to_cpu(la.l2_psm) == L2CAP_PSM_RFCOMM) | |
144 | chan->sec_level = BT_SECURITY_SDP; | |
145 | break; | |
cb6ca8e1 JH |
146 | case L2CAP_CHAN_RAW: |
147 | chan->sec_level = BT_SECURITY_SDP; | |
148 | break; | |
c16900cf JH |
149 | case L2CAP_CHAN_FIXED: |
150 | /* Fixed channels default to the L2CAP core not holding a | |
151 | * hci_conn reference for them. For fixed channels mapping to | |
152 | * L2CAP sockets we do want to hold a reference so set the | |
153 | * appropriate flag to request it. | |
154 | */ | |
155 | set_bit(FLAG_HOLD_HCI_CONN, &chan->flags); | |
156 | break; | |
6a974b50 | 157 | } |
b62f328b | 158 | |
7eafc59e | 159 | bacpy(&chan->src, &la.l2_bdaddr); |
4f1654e0 | 160 | chan->src_type = la.l2_bdaddr_type; |
89bc500e | 161 | |
38319713 | 162 | if (chan->psm && bdaddr_type_is_le(chan->src_type)) |
0ce43ce6 | 163 | chan->mode = L2CAP_MODE_LE_FLOWCTL; |
38319713 | 164 | |
89bc500e | 165 | chan->state = BT_BOUND; |
9e4425ff | 166 | sk->sk_state = BT_BOUND; |
af6bcd82 GP |
167 | |
168 | done: | |
169 | release_sock(sk); | |
170 | return err; | |
171 | } | |
172 | ||
2d792818 GP |
173 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, |
174 | int alen, int flags) | |
4e34c50b GP |
175 | { |
176 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 177 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
4e34c50b GP |
178 | struct sockaddr_l2 la; |
179 | int len, err = 0; | |
180 | ||
181 | BT_DBG("sk %p", sk); | |
182 | ||
183 | if (!addr || alen < sizeof(addr->sa_family) || | |
184 | addr->sa_family != AF_BLUETOOTH) | |
185 | return -EINVAL; | |
186 | ||
187 | memset(&la, 0, sizeof(la)); | |
188 | len = min_t(unsigned int, sizeof(la), alen); | |
189 | memcpy(&la, addr, len); | |
190 | ||
acd7d370 | 191 | if (la.l2_cid && la.l2_psm) |
4e34c50b GP |
192 | return -EINVAL; |
193 | ||
80c1a2e7 JH |
194 | if (!bdaddr_type_is_valid(la.l2_bdaddr_type)) |
195 | return -EINVAL; | |
196 | ||
eb622495 JH |
197 | /* Check that the socket wasn't bound to something that |
198 | * conflicts with the address given to connect(). If chan->src | |
199 | * is BDADDR_ANY it means bind() was never used, in which case | |
200 | * chan->src_type and la.l2_bdaddr_type do not need to match. | |
201 | */ | |
202 | if (chan->src_type == BDADDR_BREDR && bacmp(&chan->src, BDADDR_ANY) && | |
203 | bdaddr_type_is_le(la.l2_bdaddr_type)) { | |
204 | /* Old user space versions will try to incorrectly bind | |
205 | * the ATT socket using BDADDR_BREDR. We need to accept | |
206 | * this and fix up the source address type only when | |
207 | * both the source CID and destination CID indicate | |
208 | * ATT. Anything else is an invalid combination. | |
209 | */ | |
210 | if (chan->scid != L2CAP_CID_ATT || | |
dcf4adbf | 211 | la.l2_cid != cpu_to_le16(L2CAP_CID_ATT)) |
eb622495 JH |
212 | return -EINVAL; |
213 | ||
214 | /* We don't have the hdev available here to make a | |
215 | * better decision on random vs public, but since all | |
216 | * user space versions that exhibit this issue anyway do | |
217 | * not support random local addresses assuming public | |
218 | * here is good enough. | |
219 | */ | |
220 | chan->src_type = BDADDR_LE_PUBLIC; | |
221 | } | |
1f209383 JH |
222 | |
223 | if (chan->src_type != BDADDR_BREDR && la.l2_bdaddr_type == BDADDR_BREDR) | |
224 | return -EINVAL; | |
225 | ||
bfe4655f | 226 | if (bdaddr_type_is_le(la.l2_bdaddr_type)) { |
bfe4655f | 227 | /* We only allow ATT user space socket */ |
9149761a | 228 | if (la.l2_cid && |
dcf4adbf | 229 | la.l2_cid != cpu_to_le16(L2CAP_CID_ATT)) |
bfe4655f JH |
230 | return -EINVAL; |
231 | } | |
232 | ||
38319713 | 233 | if (chan->psm && bdaddr_type_is_le(chan->src_type)) |
0ce43ce6 | 234 | chan->mode = L2CAP_MODE_LE_FLOWCTL; |
38319713 | 235 | |
6e4aff10 | 236 | err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid), |
8e9f9892 | 237 | &la.l2_bdaddr, la.l2_bdaddr_type); |
4e34c50b | 238 | if (err) |
b3fb611e | 239 | return err; |
4e34c50b | 240 | |
6be36555 AE |
241 | lock_sock(sk); |
242 | ||
4e34c50b | 243 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
2d792818 | 244 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
b3fb611e AE |
245 | |
246 | release_sock(sk); | |
247 | ||
4e34c50b GP |
248 | return err; |
249 | } | |
250 | ||
af6bcd82 GP |
251 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
252 | { | |
253 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 254 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
255 | int err = 0; |
256 | ||
257 | BT_DBG("sk %p backlog %d", sk, backlog); | |
258 | ||
259 | lock_sock(sk); | |
260 | ||
6b3af733 | 261 | if (sk->sk_state != BT_BOUND) { |
af6bcd82 GP |
262 | err = -EBADFD; |
263 | goto done; | |
264 | } | |
265 | ||
6b3af733 MH |
266 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) { |
267 | err = -EINVAL; | |
268 | goto done; | |
269 | } | |
270 | ||
0c1bc5c6 | 271 | switch (chan->mode) { |
af6bcd82 | 272 | case L2CAP_MODE_BASIC: |
38319713 | 273 | case L2CAP_MODE_LE_FLOWCTL: |
af6bcd82 GP |
274 | break; |
275 | case L2CAP_MODE_ERTM: | |
276 | case L2CAP_MODE_STREAMING: | |
277 | if (!disable_ertm) | |
278 | break; | |
279 | /* fall through */ | |
280 | default: | |
beb19e4c | 281 | err = -EOPNOTSUPP; |
af6bcd82 GP |
282 | goto done; |
283 | } | |
284 | ||
af6bcd82 GP |
285 | sk->sk_max_ack_backlog = backlog; |
286 | sk->sk_ack_backlog = 0; | |
89bc500e | 287 | |
abe84903 JH |
288 | /* Listening channels need to use nested locking in order not to |
289 | * cause lockdep warnings when the created child channels end up | |
290 | * being locked in the same thread as the parent channel. | |
291 | */ | |
292 | atomic_set(&chan->nesting, L2CAP_NESTING_PARENT); | |
293 | ||
89bc500e | 294 | chan->state = BT_LISTEN; |
af6bcd82 GP |
295 | sk->sk_state = BT_LISTEN; |
296 | ||
297 | done: | |
298 | release_sock(sk); | |
299 | return err; | |
300 | } | |
301 | ||
2d792818 GP |
302 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, |
303 | int flags) | |
c47b7c72 GP |
304 | { |
305 | DECLARE_WAITQUEUE(wait, current); | |
306 | struct sock *sk = sock->sk, *nsk; | |
307 | long timeo; | |
308 | int err = 0; | |
309 | ||
3b2ab39e | 310 | lock_sock_nested(sk, L2CAP_NESTING_PARENT); |
c47b7c72 | 311 | |
c47b7c72 GP |
312 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
313 | ||
314 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
315 | ||
316 | /* Wait for an incoming connection. (wake-one). */ | |
317 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
f9a3c20a | 318 | while (1) { |
c47b7c72 | 319 | set_current_state(TASK_INTERRUPTIBLE); |
f9a3c20a PH |
320 | |
321 | if (sk->sk_state != BT_LISTEN) { | |
322 | err = -EBADFD; | |
c47b7c72 GP |
323 | break; |
324 | } | |
325 | ||
f9a3c20a PH |
326 | nsk = bt_accept_dequeue(sk, newsock); |
327 | if (nsk) | |
328 | break; | |
c47b7c72 | 329 | |
f9a3c20a PH |
330 | if (!timeo) { |
331 | err = -EAGAIN; | |
c47b7c72 GP |
332 | break; |
333 | } | |
334 | ||
335 | if (signal_pending(current)) { | |
336 | err = sock_intr_errno(timeo); | |
337 | break; | |
338 | } | |
f9a3c20a PH |
339 | |
340 | release_sock(sk); | |
341 | timeo = schedule_timeout(timeo); | |
3b2ab39e | 342 | lock_sock_nested(sk, L2CAP_NESTING_PARENT); |
c47b7c72 | 343 | } |
f9a3c20a | 344 | __set_current_state(TASK_RUNNING); |
c47b7c72 GP |
345 | remove_wait_queue(sk_sleep(sk), &wait); |
346 | ||
347 | if (err) | |
348 | goto done; | |
349 | ||
350 | newsock->state = SS_CONNECTED; | |
351 | ||
352 | BT_DBG("new socket %p", nsk); | |
353 | ||
354 | done: | |
355 | release_sock(sk); | |
356 | return err; | |
357 | } | |
358 | ||
2d792818 GP |
359 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, |
360 | int *len, int peer) | |
d7175d55 GP |
361 | { |
362 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
363 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 364 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
d7175d55 GP |
365 | |
366 | BT_DBG("sock %p, sk %p", sock, sk); | |
367 | ||
e8b1ab9e | 368 | if (peer && sk->sk_state != BT_CONNECTED && |
bf19d51b JH |
369 | sk->sk_state != BT_CONNECT && sk->sk_state != BT_CONNECT2 && |
370 | sk->sk_state != BT_CONFIG) | |
b783fbc3 JH |
371 | return -ENOTCONN; |
372 | ||
792039c7 | 373 | memset(la, 0, sizeof(struct sockaddr_l2)); |
d7175d55 GP |
374 | addr->sa_family = AF_BLUETOOTH; |
375 | *len = sizeof(struct sockaddr_l2); | |
376 | ||
d7e5e76b JH |
377 | la->l2_psm = chan->psm; |
378 | ||
d7175d55 | 379 | if (peer) { |
7eafc59e | 380 | bacpy(&la->l2_bdaddr, &chan->dst); |
fe4128e0 | 381 | la->l2_cid = cpu_to_le16(chan->dcid); |
4f1654e0 | 382 | la->l2_bdaddr_type = chan->dst_type; |
d7175d55 | 383 | } else { |
7eafc59e | 384 | bacpy(&la->l2_bdaddr, &chan->src); |
fe4128e0 | 385 | la->l2_cid = cpu_to_le16(chan->scid); |
4f1654e0 | 386 | la->l2_bdaddr_type = chan->src_type; |
d7175d55 GP |
387 | } |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
2d792818 GP |
392 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, |
393 | char __user *optval, int __user *optlen) | |
99f4808d GP |
394 | { |
395 | struct sock *sk = sock->sk; | |
4343478f | 396 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d GP |
397 | struct l2cap_options opts; |
398 | struct l2cap_conninfo cinfo; | |
399 | int len, err = 0; | |
400 | u32 opt; | |
401 | ||
402 | BT_DBG("sk %p", sk); | |
403 | ||
404 | if (get_user(len, optlen)) | |
405 | return -EFAULT; | |
406 | ||
407 | lock_sock(sk); | |
408 | ||
409 | switch (optname) { | |
410 | case L2CAP_OPTIONS: | |
64b4f8dc JH |
411 | /* LE sockets should use BT_SNDMTU/BT_RCVMTU, but since |
412 | * legacy ATT code depends on getsockopt for | |
413 | * L2CAP_OPTIONS we need to let this pass. | |
414 | */ | |
415 | if (bdaddr_type_is_le(chan->src_type) && | |
416 | chan->scid != L2CAP_CID_ATT) { | |
417 | err = -EINVAL; | |
418 | break; | |
419 | } | |
420 | ||
e3fb592b | 421 | memset(&opts, 0, sizeof(opts)); |
0c1bc5c6 GP |
422 | opts.imtu = chan->imtu; |
423 | opts.omtu = chan->omtu; | |
424 | opts.flush_to = chan->flush_to; | |
425 | opts.mode = chan->mode; | |
47d1ec61 GP |
426 | opts.fcs = chan->fcs; |
427 | opts.max_tx = chan->max_tx; | |
6327eb98 | 428 | opts.txwin_size = chan->tx_win; |
99f4808d GP |
429 | |
430 | len = min_t(unsigned int, len, sizeof(opts)); | |
431 | if (copy_to_user(optval, (char *) &opts, len)) | |
432 | err = -EFAULT; | |
433 | ||
434 | break; | |
435 | ||
436 | case L2CAP_LM: | |
4343478f | 437 | switch (chan->sec_level) { |
99f4808d GP |
438 | case BT_SECURITY_LOW: |
439 | opt = L2CAP_LM_AUTH; | |
440 | break; | |
441 | case BT_SECURITY_MEDIUM: | |
442 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
443 | break; | |
444 | case BT_SECURITY_HIGH: | |
445 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
2d792818 | 446 | L2CAP_LM_SECURE; |
99f4808d | 447 | break; |
7d513e92 MH |
448 | case BT_SECURITY_FIPS: |
449 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
450 | L2CAP_LM_SECURE | L2CAP_LM_FIPS; | |
451 | break; | |
99f4808d GP |
452 | default: |
453 | opt = 0; | |
454 | break; | |
455 | } | |
456 | ||
43bd0f32 | 457 | if (test_bit(FLAG_ROLE_SWITCH, &chan->flags)) |
99f4808d GP |
458 | opt |= L2CAP_LM_MASTER; |
459 | ||
ecf61bdb | 460 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
99f4808d GP |
461 | opt |= L2CAP_LM_RELIABLE; |
462 | ||
463 | if (put_user(opt, (u32 __user *) optval)) | |
464 | err = -EFAULT; | |
7d513e92 | 465 | |
99f4808d GP |
466 | break; |
467 | ||
468 | case L2CAP_CONNINFO: | |
469 | if (sk->sk_state != BT_CONNECTED && | |
c5daa683 GP |
470 | !(sk->sk_state == BT_CONNECT2 && |
471 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { | |
99f4808d GP |
472 | err = -ENOTCONN; |
473 | break; | |
474 | } | |
475 | ||
8d03e971 | 476 | memset(&cinfo, 0, sizeof(cinfo)); |
8c1d787b GP |
477 | cinfo.hci_handle = chan->conn->hcon->handle; |
478 | memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); | |
99f4808d GP |
479 | |
480 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
481 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
482 | err = -EFAULT; | |
483 | ||
484 | break; | |
485 | ||
486 | default: | |
487 | err = -ENOPROTOOPT; | |
488 | break; | |
489 | } | |
490 | ||
491 | release_sock(sk); | |
492 | return err; | |
493 | } | |
494 | ||
2d792818 GP |
495 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, |
496 | char __user *optval, int __user *optlen) | |
99f4808d GP |
497 | { |
498 | struct sock *sk = sock->sk; | |
4343478f | 499 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d | 500 | struct bt_security sec; |
14b12d0b | 501 | struct bt_power pwr; |
99f4808d GP |
502 | int len, err = 0; |
503 | ||
504 | BT_DBG("sk %p", sk); | |
505 | ||
506 | if (level == SOL_L2CAP) | |
507 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
508 | ||
509 | if (level != SOL_BLUETOOTH) | |
510 | return -ENOPROTOOPT; | |
511 | ||
512 | if (get_user(len, optlen)) | |
513 | return -EFAULT; | |
514 | ||
515 | lock_sock(sk); | |
516 | ||
517 | switch (optname) { | |
518 | case BT_SECURITY: | |
715ec005 | 519 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
e0c888ad | 520 | chan->chan_type != L2CAP_CHAN_FIXED && |
2d792818 | 521 | chan->chan_type != L2CAP_CHAN_RAW) { |
99f4808d GP |
522 | err = -EINVAL; |
523 | break; | |
524 | } | |
525 | ||
8f360119 | 526 | memset(&sec, 0, sizeof(sec)); |
85e34368 | 527 | if (chan->conn) { |
c6585a4d | 528 | sec.level = chan->conn->hcon->sec_level; |
99f4808d | 529 | |
85e34368 AE |
530 | if (sk->sk_state == BT_CONNECTED) |
531 | sec.key_size = chan->conn->hcon->enc_key_size; | |
532 | } else { | |
533 | sec.level = chan->sec_level; | |
534 | } | |
8f360119 | 535 | |
99f4808d GP |
536 | len = min_t(unsigned int, len, sizeof(sec)); |
537 | if (copy_to_user(optval, (char *) &sec, len)) | |
538 | err = -EFAULT; | |
539 | ||
540 | break; | |
541 | ||
542 | case BT_DEFER_SETUP: | |
543 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
544 | err = -EINVAL; | |
545 | break; | |
546 | } | |
547 | ||
c5daa683 GP |
548 | if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), |
549 | (u32 __user *) optval)) | |
99f4808d GP |
550 | err = -EFAULT; |
551 | ||
552 | break; | |
553 | ||
554 | case BT_FLUSHABLE: | |
d57b0e8b | 555 | if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags), |
2d792818 | 556 | (u32 __user *) optval)) |
99f4808d GP |
557 | err = -EFAULT; |
558 | ||
559 | break; | |
560 | ||
14b12d0b JG |
561 | case BT_POWER: |
562 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
2d792818 | 563 | && sk->sk_type != SOCK_RAW) { |
14b12d0b JG |
564 | err = -EINVAL; |
565 | break; | |
566 | } | |
567 | ||
15770b1a | 568 | pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
14b12d0b JG |
569 | |
570 | len = min_t(unsigned int, len, sizeof(pwr)); | |
571 | if (copy_to_user(optval, (char *) &pwr, len)) | |
572 | err = -EFAULT; | |
573 | ||
574 | break; | |
575 | ||
2ea66482 | 576 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
577 | if (put_user(chan->chan_policy, (u32 __user *) optval)) |
578 | err = -EFAULT; | |
579 | break; | |
580 | ||
1f435424 | 581 | case BT_SNDMTU: |
1f435424 JH |
582 | if (!bdaddr_type_is_le(chan->src_type)) { |
583 | err = -EINVAL; | |
584 | break; | |
585 | } | |
586 | ||
587 | if (sk->sk_state != BT_CONNECTED) { | |
588 | err = -ENOTCONN; | |
589 | break; | |
590 | } | |
591 | ||
592 | if (put_user(chan->omtu, (u16 __user *) optval)) | |
593 | err = -EFAULT; | |
594 | break; | |
595 | ||
596 | case BT_RCVMTU: | |
1f435424 JH |
597 | if (!bdaddr_type_is_le(chan->src_type)) { |
598 | err = -EINVAL; | |
599 | break; | |
600 | } | |
601 | ||
602 | if (put_user(chan->imtu, (u16 __user *) optval)) | |
603 | err = -EFAULT; | |
604 | break; | |
605 | ||
99f4808d GP |
606 | default: |
607 | err = -ENOPROTOOPT; | |
608 | break; | |
609 | } | |
610 | ||
611 | release_sock(sk); | |
612 | return err; | |
613 | } | |
614 | ||
682877c3 AG |
615 | static bool l2cap_valid_mtu(struct l2cap_chan *chan, u16 mtu) |
616 | { | |
617 | switch (chan->scid) { | |
073d1cf3 | 618 | case L2CAP_CID_ATT: |
8c3a4f00 | 619 | if (mtu < L2CAP_LE_MIN_MTU) |
682877c3 AG |
620 | return false; |
621 | break; | |
622 | ||
623 | default: | |
624 | if (mtu < L2CAP_DEFAULT_MIN_MTU) | |
625 | return false; | |
626 | } | |
627 | ||
628 | return true; | |
629 | } | |
630 | ||
2d792818 GP |
631 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, |
632 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
633 | { |
634 | struct sock *sk = sock->sk; | |
b4450035 | 635 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 GP |
636 | struct l2cap_options opts; |
637 | int len, err = 0; | |
638 | u32 opt; | |
639 | ||
640 | BT_DBG("sk %p", sk); | |
641 | ||
642 | lock_sock(sk); | |
643 | ||
644 | switch (optname) { | |
645 | case L2CAP_OPTIONS: | |
64b4f8dc JH |
646 | if (bdaddr_type_is_le(chan->src_type)) { |
647 | err = -EINVAL; | |
648 | break; | |
649 | } | |
650 | ||
33575df7 GP |
651 | if (sk->sk_state == BT_CONNECTED) { |
652 | err = -EINVAL; | |
653 | break; | |
654 | } | |
655 | ||
0c1bc5c6 GP |
656 | opts.imtu = chan->imtu; |
657 | opts.omtu = chan->omtu; | |
658 | opts.flush_to = chan->flush_to; | |
659 | opts.mode = chan->mode; | |
47d1ec61 GP |
660 | opts.fcs = chan->fcs; |
661 | opts.max_tx = chan->max_tx; | |
6327eb98 | 662 | opts.txwin_size = chan->tx_win; |
33575df7 GP |
663 | |
664 | len = min_t(unsigned int, sizeof(opts), optlen); | |
665 | if (copy_from_user((char *) &opts, optval, len)) { | |
666 | err = -EFAULT; | |
667 | break; | |
668 | } | |
669 | ||
6327eb98 | 670 | if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) { |
33575df7 GP |
671 | err = -EINVAL; |
672 | break; | |
673 | } | |
674 | ||
682877c3 AG |
675 | if (!l2cap_valid_mtu(chan, opts.imtu)) { |
676 | err = -EINVAL; | |
677 | break; | |
678 | } | |
679 | ||
0c1bc5c6 GP |
680 | chan->mode = opts.mode; |
681 | switch (chan->mode) { | |
38319713 JH |
682 | case L2CAP_MODE_LE_FLOWCTL: |
683 | break; | |
33575df7 | 684 | case L2CAP_MODE_BASIC: |
c1360a1c | 685 | clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
33575df7 GP |
686 | break; |
687 | case L2CAP_MODE_ERTM: | |
688 | case L2CAP_MODE_STREAMING: | |
689 | if (!disable_ertm) | |
690 | break; | |
691 | /* fall through */ | |
692 | default: | |
693 | err = -EINVAL; | |
694 | break; | |
695 | } | |
696 | ||
0c1bc5c6 GP |
697 | chan->imtu = opts.imtu; |
698 | chan->omtu = opts.omtu; | |
47d1ec61 GP |
699 | chan->fcs = opts.fcs; |
700 | chan->max_tx = opts.max_tx; | |
6327eb98 | 701 | chan->tx_win = opts.txwin_size; |
12d59781 | 702 | chan->flush_to = opts.flush_to; |
33575df7 GP |
703 | break; |
704 | ||
705 | case L2CAP_LM: | |
706 | if (get_user(opt, (u32 __user *) optval)) { | |
707 | err = -EFAULT; | |
708 | break; | |
709 | } | |
710 | ||
7d513e92 MH |
711 | if (opt & L2CAP_LM_FIPS) { |
712 | err = -EINVAL; | |
713 | break; | |
714 | } | |
715 | ||
33575df7 | 716 | if (opt & L2CAP_LM_AUTH) |
4343478f | 717 | chan->sec_level = BT_SECURITY_LOW; |
33575df7 | 718 | if (opt & L2CAP_LM_ENCRYPT) |
4343478f | 719 | chan->sec_level = BT_SECURITY_MEDIUM; |
33575df7 | 720 | if (opt & L2CAP_LM_SECURE) |
4343478f | 721 | chan->sec_level = BT_SECURITY_HIGH; |
33575df7 | 722 | |
43bd0f32 AE |
723 | if (opt & L2CAP_LM_MASTER) |
724 | set_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
725 | else | |
726 | clear_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
ecf61bdb AE |
727 | |
728 | if (opt & L2CAP_LM_RELIABLE) | |
729 | set_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
730 | else | |
731 | clear_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
33575df7 GP |
732 | break; |
733 | ||
734 | default: | |
735 | err = -ENOPROTOOPT; | |
736 | break; | |
737 | } | |
738 | ||
739 | release_sock(sk); | |
740 | return err; | |
741 | } | |
742 | ||
2d792818 GP |
743 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, |
744 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
745 | { |
746 | struct sock *sk = sock->sk; | |
4343478f | 747 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 | 748 | struct bt_security sec; |
14b12d0b | 749 | struct bt_power pwr; |
f1cb9af5 | 750 | struct l2cap_conn *conn; |
33575df7 GP |
751 | int len, err = 0; |
752 | u32 opt; | |
753 | ||
754 | BT_DBG("sk %p", sk); | |
755 | ||
756 | if (level == SOL_L2CAP) | |
757 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
758 | ||
759 | if (level != SOL_BLUETOOTH) | |
760 | return -ENOPROTOOPT; | |
761 | ||
762 | lock_sock(sk); | |
763 | ||
764 | switch (optname) { | |
765 | case BT_SECURITY: | |
715ec005 | 766 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
e0c888ad | 767 | chan->chan_type != L2CAP_CHAN_FIXED && |
2d792818 | 768 | chan->chan_type != L2CAP_CHAN_RAW) { |
33575df7 GP |
769 | err = -EINVAL; |
770 | break; | |
771 | } | |
772 | ||
773 | sec.level = BT_SECURITY_LOW; | |
774 | ||
775 | len = min_t(unsigned int, sizeof(sec), optlen); | |
776 | if (copy_from_user((char *) &sec, optval, len)) { | |
777 | err = -EFAULT; | |
778 | break; | |
779 | } | |
780 | ||
781 | if (sec.level < BT_SECURITY_LOW || | |
2d792818 | 782 | sec.level > BT_SECURITY_HIGH) { |
33575df7 GP |
783 | err = -EINVAL; |
784 | break; | |
785 | } | |
786 | ||
4343478f | 787 | chan->sec_level = sec.level; |
f1cb9af5 | 788 | |
0bee1d60 GP |
789 | if (!chan->conn) |
790 | break; | |
791 | ||
f1cb9af5 | 792 | conn = chan->conn; |
0bee1d60 GP |
793 | |
794 | /*change security for LE channels */ | |
073d1cf3 | 795 | if (chan->scid == L2CAP_CID_ATT) { |
cc110922 | 796 | if (smp_conn_security(conn->hcon, sec.level)) |
f1cb9af5 | 797 | break; |
d52deb17 | 798 | set_bit(FLAG_PENDING_SECURITY, &chan->flags); |
f1cb9af5 | 799 | sk->sk_state = BT_CONFIG; |
3542b854 | 800 | chan->state = BT_CONFIG; |
0bee1d60 | 801 | |
a7d7723a GP |
802 | /* or for ACL link */ |
803 | } else if ((sk->sk_state == BT_CONNECT2 && | |
2d792818 | 804 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) || |
a7d7723a | 805 | sk->sk_state == BT_CONNECTED) { |
e7cafc45 | 806 | if (!l2cap_chan_check_security(chan, true)) |
c5daa683 | 807 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
a7d7723a GP |
808 | else |
809 | sk->sk_state_change(sk); | |
0bee1d60 GP |
810 | } else { |
811 | err = -EINVAL; | |
f1cb9af5 | 812 | } |
33575df7 GP |
813 | break; |
814 | ||
815 | case BT_DEFER_SETUP: | |
816 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
817 | err = -EINVAL; | |
818 | break; | |
819 | } | |
820 | ||
821 | if (get_user(opt, (u32 __user *) optval)) { | |
822 | err = -EFAULT; | |
823 | break; | |
824 | } | |
825 | ||
bdc25783 | 826 | if (opt) { |
c5daa683 | 827 | set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); |
bdc25783 MH |
828 | set_bit(FLAG_DEFER_SETUP, &chan->flags); |
829 | } else { | |
c5daa683 | 830 | clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); |
bdc25783 MH |
831 | clear_bit(FLAG_DEFER_SETUP, &chan->flags); |
832 | } | |
33575df7 GP |
833 | break; |
834 | ||
835 | case BT_FLUSHABLE: | |
836 | if (get_user(opt, (u32 __user *) optval)) { | |
837 | err = -EFAULT; | |
838 | break; | |
839 | } | |
840 | ||
841 | if (opt > BT_FLUSHABLE_ON) { | |
842 | err = -EINVAL; | |
843 | break; | |
844 | } | |
845 | ||
846 | if (opt == BT_FLUSHABLE_OFF) { | |
c1f23a2b | 847 | conn = chan->conn; |
25985edc | 848 | /* proceed further only when we have l2cap_conn and |
33575df7 GP |
849 | No Flush support in the LM */ |
850 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { | |
851 | err = -EINVAL; | |
852 | break; | |
853 | } | |
854 | } | |
855 | ||
d57b0e8b AE |
856 | if (opt) |
857 | set_bit(FLAG_FLUSHABLE, &chan->flags); | |
858 | else | |
859 | clear_bit(FLAG_FLUSHABLE, &chan->flags); | |
33575df7 GP |
860 | break; |
861 | ||
14b12d0b JG |
862 | case BT_POWER: |
863 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && | |
2d792818 | 864 | chan->chan_type != L2CAP_CHAN_RAW) { |
14b12d0b JG |
865 | err = -EINVAL; |
866 | break; | |
867 | } | |
868 | ||
869 | pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; | |
870 | ||
871 | len = min_t(unsigned int, sizeof(pwr), optlen); | |
872 | if (copy_from_user((char *) &pwr, optval, len)) { | |
873 | err = -EFAULT; | |
874 | break; | |
875 | } | |
15770b1a AE |
876 | |
877 | if (pwr.force_active) | |
878 | set_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
879 | else | |
880 | clear_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
14b12d0b JG |
881 | break; |
882 | ||
2ea66482 | 883 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
884 | if (get_user(opt, (u32 __user *) optval)) { |
885 | err = -EFAULT; | |
886 | break; | |
887 | } | |
888 | ||
889 | if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) { | |
890 | err = -EINVAL; | |
891 | break; | |
892 | } | |
893 | ||
894 | if (chan->mode != L2CAP_MODE_ERTM && | |
2d792818 | 895 | chan->mode != L2CAP_MODE_STREAMING) { |
2ea66482 MM |
896 | err = -EOPNOTSUPP; |
897 | break; | |
898 | } | |
899 | ||
900 | chan->chan_policy = (u8) opt; | |
3f7a56c4 MM |
901 | |
902 | if (sk->sk_state == BT_CONNECTED && | |
903 | chan->move_role == L2CAP_MOVE_ROLE_NONE) | |
904 | l2cap_move_start(chan); | |
905 | ||
14b12d0b JG |
906 | break; |
907 | ||
1f435424 | 908 | case BT_SNDMTU: |
1f435424 JH |
909 | if (!bdaddr_type_is_le(chan->src_type)) { |
910 | err = -EINVAL; | |
911 | break; | |
912 | } | |
913 | ||
914 | /* Setting is not supported as it's the remote side that | |
915 | * decides this. | |
916 | */ | |
917 | err = -EPERM; | |
918 | break; | |
919 | ||
920 | case BT_RCVMTU: | |
1f435424 JH |
921 | if (!bdaddr_type_is_le(chan->src_type)) { |
922 | err = -EINVAL; | |
923 | break; | |
924 | } | |
925 | ||
926 | if (sk->sk_state == BT_CONNECTED) { | |
927 | err = -EISCONN; | |
928 | break; | |
929 | } | |
930 | ||
931 | if (get_user(opt, (u32 __user *) optval)) { | |
932 | err = -EFAULT; | |
933 | break; | |
934 | } | |
935 | ||
936 | chan->imtu = opt; | |
937 | break; | |
938 | ||
33575df7 GP |
939 | default: |
940 | err = -ENOPROTOOPT; | |
941 | break; | |
942 | } | |
943 | ||
944 | release_sock(sk); | |
945 | return err; | |
946 | } | |
fd83ccdb | 947 | |
2d792818 GP |
948 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
949 | struct msghdr *msg, size_t len) | |
fd83ccdb GP |
950 | { |
951 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 952 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb GP |
953 | int err; |
954 | ||
955 | BT_DBG("sock %p, sk %p", sock, sk); | |
956 | ||
957 | err = sock_error(sk); | |
958 | if (err) | |
959 | return err; | |
960 | ||
961 | if (msg->msg_flags & MSG_OOB) | |
962 | return -EOPNOTSUPP; | |
963 | ||
a6a5568c | 964 | if (sk->sk_state != BT_CONNECTED) |
9a91a04a | 965 | return -ENOTCONN; |
fd83ccdb | 966 | |
e793dcf0 JH |
967 | lock_sock(sk); |
968 | err = bt_sock_wait_ready(sk, msg->msg_flags); | |
969 | release_sock(sk); | |
970 | if (err) | |
971 | return err; | |
972 | ||
a6a5568c | 973 | l2cap_chan_lock(chan); |
8d46321c | 974 | err = l2cap_chan_send(chan, msg, len); |
a6a5568c | 975 | l2cap_chan_unlock(chan); |
fd83ccdb | 976 | |
fd83ccdb GP |
977 | return err; |
978 | } | |
33575df7 | 979 | |
2d792818 GP |
980 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
981 | struct msghdr *msg, size_t len, int flags) | |
68983259 GP |
982 | { |
983 | struct sock *sk = sock->sk; | |
e328140f MM |
984 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
985 | int err; | |
68983259 GP |
986 | |
987 | lock_sock(sk); | |
988 | ||
c5daa683 GP |
989 | if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP, |
990 | &bt_sk(sk)->flags)) { | |
38319713 JH |
991 | if (bdaddr_type_is_le(pi->chan->src_type)) { |
992 | sk->sk_state = BT_CONNECTED; | |
993 | pi->chan->state = BT_CONNECTED; | |
994 | __l2cap_le_connect_rsp_defer(pi->chan); | |
995 | } else { | |
996 | sk->sk_state = BT_CONFIG; | |
997 | pi->chan->state = BT_CONFIG; | |
998 | __l2cap_connect_rsp_defer(pi->chan); | |
999 | } | |
8c1d787b | 1000 | |
970871bc JH |
1001 | err = 0; |
1002 | goto done; | |
68983259 GP |
1003 | } |
1004 | ||
1005 | release_sock(sk); | |
1006 | ||
1007 | if (sock->type == SOCK_STREAM) | |
e328140f MM |
1008 | err = bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); |
1009 | else | |
1010 | err = bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
1011 | ||
1012 | if (pi->chan->mode != L2CAP_MODE_ERTM) | |
1013 | return err; | |
1014 | ||
1015 | /* Attempt to put pending rx data in the socket buffer */ | |
1016 | ||
1017 | lock_sock(sk); | |
1018 | ||
1019 | if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state)) | |
1020 | goto done; | |
1021 | ||
1022 | if (pi->rx_busy_skb) { | |
1023 | if (!sock_queue_rcv_skb(sk, pi->rx_busy_skb)) | |
1024 | pi->rx_busy_skb = NULL; | |
1025 | else | |
1026 | goto done; | |
1027 | } | |
1028 | ||
1029 | /* Restore data flow when half of the receive buffer is | |
1030 | * available. This avoids resending large numbers of | |
1031 | * frames. | |
1032 | */ | |
1033 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1) | |
1034 | l2cap_chan_busy(pi->chan, 0); | |
68983259 | 1035 | |
e328140f MM |
1036 | done: |
1037 | release_sock(sk); | |
1038 | return err; | |
68983259 GP |
1039 | } |
1040 | ||
05fc1576 GP |
1041 | /* Kill socket (only if zapped and orphan) |
1042 | * Must be called on unlocked socket. | |
1043 | */ | |
ba3bd0ee | 1044 | static void l2cap_sock_kill(struct sock *sk) |
05fc1576 GP |
1045 | { |
1046 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
1047 | return; | |
1048 | ||
e05dcc32 | 1049 | BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state)); |
05fc1576 GP |
1050 | |
1051 | /* Kill poor orphan */ | |
6ff5abbf | 1052 | |
4af66c69 | 1053 | l2cap_chan_put(l2cap_pi(sk)->chan); |
05fc1576 GP |
1054 | sock_set_flag(sk, SOCK_DEAD); |
1055 | sock_put(sk); | |
1056 | } | |
1057 | ||
dc25306b GP |
1058 | static int __l2cap_wait_ack(struct sock *sk) |
1059 | { | |
1060 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
1061 | DECLARE_WAITQUEUE(wait, current); | |
1062 | int err = 0; | |
1063 | int timeo = HZ/5; | |
1064 | ||
1065 | add_wait_queue(sk_sleep(sk), &wait); | |
1066 | set_current_state(TASK_INTERRUPTIBLE); | |
1067 | while (chan->unacked_frames > 0 && chan->conn) { | |
1068 | if (!timeo) | |
1069 | timeo = HZ/5; | |
1070 | ||
1071 | if (signal_pending(current)) { | |
1072 | err = sock_intr_errno(timeo); | |
1073 | break; | |
1074 | } | |
1075 | ||
1076 | release_sock(sk); | |
1077 | timeo = schedule_timeout(timeo); | |
1078 | lock_sock(sk); | |
1079 | set_current_state(TASK_INTERRUPTIBLE); | |
1080 | ||
1081 | err = sock_error(sk); | |
1082 | if (err) | |
1083 | break; | |
1084 | } | |
1085 | set_current_state(TASK_RUNNING); | |
1086 | remove_wait_queue(sk_sleep(sk), &wait); | |
1087 | return err; | |
1088 | } | |
1089 | ||
dcba0dba GP |
1090 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
1091 | { | |
1092 | struct sock *sk = sock->sk; | |
7ddb6e0f | 1093 | struct l2cap_chan *chan; |
3df91ea2 | 1094 | struct l2cap_conn *conn; |
dcba0dba GP |
1095 | int err = 0; |
1096 | ||
1097 | BT_DBG("sock %p, sk %p", sock, sk); | |
1098 | ||
1099 | if (!sk) | |
1100 | return 0; | |
1101 | ||
7ddb6e0f | 1102 | chan = l2cap_pi(sk)->chan; |
3df91ea2 AE |
1103 | conn = chan->conn; |
1104 | ||
49d11741 JH |
1105 | BT_DBG("chan %p state %s", chan, state_to_string(chan->state)); |
1106 | ||
3df91ea2 AE |
1107 | if (conn) |
1108 | mutex_lock(&conn->chan_lock); | |
7ddb6e0f | 1109 | |
6be36555 | 1110 | l2cap_chan_lock(chan); |
dcba0dba | 1111 | lock_sock(sk); |
6be36555 | 1112 | |
dcba0dba | 1113 | if (!sk->sk_shutdown) { |
0c1bc5c6 | 1114 | if (chan->mode == L2CAP_MODE_ERTM) |
dcba0dba GP |
1115 | err = __l2cap_wait_ack(sk); |
1116 | ||
1117 | sk->sk_shutdown = SHUTDOWN_MASK; | |
3df91ea2 | 1118 | |
6be36555 | 1119 | release_sock(sk); |
0f852724 | 1120 | l2cap_chan_close(chan, 0); |
6be36555 | 1121 | lock_sock(sk); |
dcba0dba | 1122 | |
093facf3 VD |
1123 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime && |
1124 | !(current->flags & PF_EXITING)) | |
dcba0dba | 1125 | err = bt_sock_wait_state(sk, BT_CLOSED, |
2d792818 | 1126 | sk->sk_lingertime); |
dcba0dba GP |
1127 | } |
1128 | ||
1129 | if (!err && sk->sk_err) | |
1130 | err = -sk->sk_err; | |
1131 | ||
1132 | release_sock(sk); | |
6be36555 | 1133 | l2cap_chan_unlock(chan); |
3df91ea2 AE |
1134 | |
1135 | if (conn) | |
1136 | mutex_unlock(&conn->chan_lock); | |
1137 | ||
dcba0dba GP |
1138 | return err; |
1139 | } | |
1140 | ||
554f05bb GP |
1141 | static int l2cap_sock_release(struct socket *sock) |
1142 | { | |
1143 | struct sock *sk = sock->sk; | |
1144 | int err; | |
1145 | ||
1146 | BT_DBG("sock %p, sk %p", sock, sk); | |
1147 | ||
1148 | if (!sk) | |
1149 | return 0; | |
1150 | ||
5b28d95c MY |
1151 | bt_sock_unlink(&l2cap_sk_list, sk); |
1152 | ||
554f05bb GP |
1153 | err = l2cap_sock_shutdown(sock, 2); |
1154 | ||
1155 | sock_orphan(sk); | |
1156 | l2cap_sock_kill(sk); | |
1157 | return err; | |
1158 | } | |
1159 | ||
c0df7f6e AE |
1160 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
1161 | { | |
1162 | struct sock *sk; | |
1163 | ||
49d11741 JH |
1164 | BT_DBG("parent %p state %s", parent, |
1165 | state_to_string(parent->sk_state)); | |
c0df7f6e AE |
1166 | |
1167 | /* Close not yet accepted channels */ | |
1168 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
1169 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
1170 | ||
49d11741 JH |
1171 | BT_DBG("child chan %p state %s", chan, |
1172 | state_to_string(chan->state)); | |
1173 | ||
c0df7f6e AE |
1174 | l2cap_chan_lock(chan); |
1175 | __clear_chan_timer(chan); | |
1176 | l2cap_chan_close(chan, ECONNRESET); | |
1177 | l2cap_chan_unlock(chan); | |
1178 | ||
1179 | l2cap_sock_kill(sk); | |
1180 | } | |
1181 | } | |
1182 | ||
80b98027 | 1183 | static struct l2cap_chan *l2cap_sock_new_connection_cb(struct l2cap_chan *chan) |
80808e43 | 1184 | { |
80b98027 | 1185 | struct sock *sk, *parent = chan->data; |
80808e43 | 1186 | |
8ffb9290 GP |
1187 | lock_sock(parent); |
1188 | ||
53826692 GP |
1189 | /* Check for backlog size */ |
1190 | if (sk_acceptq_is_full(parent)) { | |
1191 | BT_DBG("backlog full %d", parent->sk_ack_backlog); | |
8a96f3cd | 1192 | release_sock(parent); |
53826692 GP |
1193 | return NULL; |
1194 | } | |
1195 | ||
80808e43 | 1196 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, |
2d792818 | 1197 | GFP_ATOMIC); |
8a96f3cd JT |
1198 | if (!sk) { |
1199 | release_sock(parent); | |
80808e43 | 1200 | return NULL; |
8a96f3cd | 1201 | } |
80808e43 | 1202 | |
d22015aa OP |
1203 | bt_sock_reclassify_lock(sk, BTPROTO_L2CAP); |
1204 | ||
80808e43 GP |
1205 | l2cap_sock_init(sk, parent); |
1206 | ||
644912e1 GP |
1207 | bt_accept_enqueue(parent, sk); |
1208 | ||
8ffb9290 GP |
1209 | release_sock(parent); |
1210 | ||
80808e43 GP |
1211 | return l2cap_pi(sk)->chan; |
1212 | } | |
1213 | ||
80b98027 | 1214 | static int l2cap_sock_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) |
23070494 | 1215 | { |
80b98027 | 1216 | struct sock *sk = chan->data; |
84b34d98 | 1217 | int err; |
e328140f | 1218 | |
6be36555 AE |
1219 | lock_sock(sk); |
1220 | ||
84b34d98 | 1221 | if (l2cap_pi(sk)->rx_busy_skb) { |
6be36555 AE |
1222 | err = -ENOMEM; |
1223 | goto done; | |
1224 | } | |
e328140f MM |
1225 | |
1226 | err = sock_queue_rcv_skb(sk, skb); | |
1227 | ||
1228 | /* For ERTM, handle one skb that doesn't fit into the recv | |
1229 | * buffer. This is important to do because the data frames | |
1230 | * have already been acked, so the skb cannot be discarded. | |
1231 | * | |
1232 | * Notify the l2cap core that the buffer is full, so the | |
1233 | * LOCAL_BUSY state is entered and no more frames are | |
1234 | * acked and reassembled until there is buffer space | |
1235 | * available. | |
1236 | */ | |
84b34d98 MH |
1237 | if (err < 0 && chan->mode == L2CAP_MODE_ERTM) { |
1238 | l2cap_pi(sk)->rx_busy_skb = skb; | |
1239 | l2cap_chan_busy(chan, 1); | |
e328140f MM |
1240 | err = 0; |
1241 | } | |
23070494 | 1242 | |
6be36555 AE |
1243 | done: |
1244 | release_sock(sk); | |
1245 | ||
e328140f | 1246 | return err; |
23070494 GP |
1247 | } |
1248 | ||
80b98027 | 1249 | static void l2cap_sock_close_cb(struct l2cap_chan *chan) |
ba3bd0ee | 1250 | { |
80b98027 | 1251 | struct sock *sk = chan->data; |
ba3bd0ee GP |
1252 | |
1253 | l2cap_sock_kill(sk); | |
1254 | } | |
1255 | ||
c0df7f6e AE |
1256 | static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err) |
1257 | { | |
1258 | struct sock *sk = chan->data; | |
1259 | struct sock *parent; | |
1260 | ||
49d11741 JH |
1261 | BT_DBG("chan %p state %s", chan, state_to_string(chan->state)); |
1262 | ||
3b2ab39e JH |
1263 | /* This callback can be called both for server (BT_LISTEN) |
1264 | * sockets as well as "normal" ones. To avoid lockdep warnings | |
1265 | * with child socket locking (through l2cap_sock_cleanup_listen) | |
1266 | * we need separation into separate nesting levels. The simplest | |
1267 | * way to accomplish this is to inherit the nesting level used | |
1268 | * for the channel. | |
1269 | */ | |
1270 | lock_sock_nested(sk, atomic_read(&chan->nesting)); | |
c0df7f6e AE |
1271 | |
1272 | parent = bt_sk(sk)->parent; | |
1273 | ||
1274 | sock_set_flag(sk, SOCK_ZAPPED); | |
1275 | ||
1276 | switch (chan->state) { | |
1277 | case BT_OPEN: | |
1278 | case BT_BOUND: | |
1279 | case BT_CLOSED: | |
1280 | break; | |
1281 | case BT_LISTEN: | |
1282 | l2cap_sock_cleanup_listen(sk); | |
1283 | sk->sk_state = BT_CLOSED; | |
1284 | chan->state = BT_CLOSED; | |
1285 | ||
1286 | break; | |
1287 | default: | |
1288 | sk->sk_state = BT_CLOSED; | |
1289 | chan->state = BT_CLOSED; | |
1290 | ||
1291 | sk->sk_err = err; | |
1292 | ||
1293 | if (parent) { | |
1294 | bt_accept_unlink(sk); | |
676d2369 | 1295 | parent->sk_data_ready(parent); |
c0df7f6e AE |
1296 | } else { |
1297 | sk->sk_state_change(sk); | |
1298 | } | |
1299 | ||
1300 | break; | |
1301 | } | |
1302 | ||
1303 | release_sock(sk); | |
1304 | } | |
1305 | ||
53f52121 GP |
1306 | static void l2cap_sock_state_change_cb(struct l2cap_chan *chan, int state, |
1307 | int err) | |
89bc500e | 1308 | { |
80b98027 | 1309 | struct sock *sk = chan->data; |
89bc500e GP |
1310 | |
1311 | sk->sk_state = state; | |
53f52121 GP |
1312 | |
1313 | if (err) | |
1314 | sk->sk_err = err; | |
89bc500e GP |
1315 | } |
1316 | ||
2f7719ce | 1317 | static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan, |
d9fbd02b | 1318 | unsigned long hdr_len, |
90338947 | 1319 | unsigned long len, int nb) |
2f7719ce | 1320 | { |
0f2c6153 | 1321 | struct sock *sk = chan->data; |
90338947 GP |
1322 | struct sk_buff *skb; |
1323 | int err; | |
1324 | ||
a6a5568c | 1325 | l2cap_chan_unlock(chan); |
d9fbd02b | 1326 | skb = bt_skb_send_alloc(sk, hdr_len + len, nb, &err); |
a6a5568c MM |
1327 | l2cap_chan_lock(chan); |
1328 | ||
90338947 GP |
1329 | if (!skb) |
1330 | return ERR_PTR(err); | |
2f7719ce | 1331 | |
8d46321c MH |
1332 | skb->priority = sk->sk_priority; |
1333 | ||
0e790c64 GP |
1334 | bt_cb(skb)->chan = chan; |
1335 | ||
90338947 | 1336 | return skb; |
2f7719ce AE |
1337 | } |
1338 | ||
54a59aa2 AE |
1339 | static void l2cap_sock_ready_cb(struct l2cap_chan *chan) |
1340 | { | |
1341 | struct sock *sk = chan->data; | |
1342 | struct sock *parent; | |
1343 | ||
1344 | lock_sock(sk); | |
1345 | ||
1346 | parent = bt_sk(sk)->parent; | |
1347 | ||
1348 | BT_DBG("sk %p, parent %p", sk, parent); | |
1349 | ||
1350 | sk->sk_state = BT_CONNECTED; | |
1351 | sk->sk_state_change(sk); | |
1352 | ||
1353 | if (parent) | |
676d2369 | 1354 | parent->sk_data_ready(parent); |
54a59aa2 AE |
1355 | |
1356 | release_sock(sk); | |
1357 | } | |
1358 | ||
2dc4e510 GP |
1359 | static void l2cap_sock_defer_cb(struct l2cap_chan *chan) |
1360 | { | |
acdcabf5 GP |
1361 | struct sock *parent, *sk = chan->data; |
1362 | ||
1363 | lock_sock(sk); | |
2dc4e510 | 1364 | |
acdcabf5 | 1365 | parent = bt_sk(sk)->parent; |
2dc4e510 | 1366 | if (parent) |
676d2369 | 1367 | parent->sk_data_ready(parent); |
acdcabf5 GP |
1368 | |
1369 | release_sock(sk); | |
2dc4e510 GP |
1370 | } |
1371 | ||
d97c899b MH |
1372 | static void l2cap_sock_resume_cb(struct l2cap_chan *chan) |
1373 | { | |
1374 | struct sock *sk = chan->data; | |
1375 | ||
d52deb17 JH |
1376 | if (test_and_clear_bit(FLAG_PENDING_SECURITY, &chan->flags)) { |
1377 | sk->sk_state = BT_CONNECTED; | |
1378 | chan->state = BT_CONNECTED; | |
1379 | } | |
1380 | ||
d97c899b MH |
1381 | clear_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
1382 | sk->sk_state_change(sk); | |
1383 | } | |
1384 | ||
5ec1bbe5 GP |
1385 | static void l2cap_sock_set_shutdown_cb(struct l2cap_chan *chan) |
1386 | { | |
1387 | struct sock *sk = chan->data; | |
1388 | ||
1389 | lock_sock(sk); | |
1390 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1391 | release_sock(sk); | |
1392 | } | |
1393 | ||
8d836d71 GP |
1394 | static long l2cap_sock_get_sndtimeo_cb(struct l2cap_chan *chan) |
1395 | { | |
1396 | struct sock *sk = chan->data; | |
1397 | ||
1398 | return sk->sk_sndtimeo; | |
1399 | } | |
1400 | ||
837776f7 JH |
1401 | static void l2cap_sock_suspend_cb(struct l2cap_chan *chan) |
1402 | { | |
1403 | struct sock *sk = chan->data; | |
1404 | ||
1405 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); | |
1406 | sk->sk_state_change(sk); | |
1407 | } | |
1408 | ||
67f86a45 | 1409 | static const struct l2cap_ops l2cap_chan_ops = { |
0498878b JR |
1410 | .name = "L2CAP Socket Interface", |
1411 | .new_connection = l2cap_sock_new_connection_cb, | |
1412 | .recv = l2cap_sock_recv_cb, | |
1413 | .close = l2cap_sock_close_cb, | |
1414 | .teardown = l2cap_sock_teardown_cb, | |
1415 | .state_change = l2cap_sock_state_change_cb, | |
1416 | .ready = l2cap_sock_ready_cb, | |
1417 | .defer = l2cap_sock_defer_cb, | |
1418 | .resume = l2cap_sock_resume_cb, | |
1419 | .suspend = l2cap_sock_suspend_cb, | |
1420 | .set_shutdown = l2cap_sock_set_shutdown_cb, | |
1421 | .get_sndtimeo = l2cap_sock_get_sndtimeo_cb, | |
1422 | .alloc_skb = l2cap_sock_alloc_skb_cb, | |
80808e43 GP |
1423 | }; |
1424 | ||
bb58f747 GP |
1425 | static void l2cap_sock_destruct(struct sock *sk) |
1426 | { | |
1427 | BT_DBG("sk %p", sk); | |
1428 | ||
23d3a869 SL |
1429 | if (l2cap_pi(sk)->chan) |
1430 | l2cap_chan_put(l2cap_pi(sk)->chan); | |
84b34d98 | 1431 | |
e328140f MM |
1432 | if (l2cap_pi(sk)->rx_busy_skb) { |
1433 | kfree_skb(l2cap_pi(sk)->rx_busy_skb); | |
1434 | l2cap_pi(sk)->rx_busy_skb = NULL; | |
1435 | } | |
1436 | ||
bb58f747 GP |
1437 | skb_queue_purge(&sk->sk_receive_queue); |
1438 | skb_queue_purge(&sk->sk_write_queue); | |
1439 | } | |
1440 | ||
2edf870d MH |
1441 | static void l2cap_skb_msg_name(struct sk_buff *skb, void *msg_name, |
1442 | int *msg_namelen) | |
1443 | { | |
342dfc30 | 1444 | DECLARE_SOCKADDR(struct sockaddr_l2 *, la, msg_name); |
2edf870d MH |
1445 | |
1446 | memset(la, 0, sizeof(struct sockaddr_l2)); | |
1447 | la->l2_family = AF_BLUETOOTH; | |
1448 | la->l2_psm = bt_cb(skb)->psm; | |
1449 | bacpy(&la->l2_bdaddr, &bt_cb(skb)->bdaddr); | |
1450 | ||
1451 | *msg_namelen = sizeof(struct sockaddr_l2); | |
1452 | } | |
1453 | ||
80808e43 | 1454 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747 | 1455 | { |
84b34d98 | 1456 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
bb58f747 GP |
1457 | |
1458 | BT_DBG("sk %p", sk); | |
1459 | ||
1460 | if (parent) { | |
b4450035 GP |
1461 | struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
1462 | ||
bb58f747 | 1463 | sk->sk_type = parent->sk_type; |
c5daa683 | 1464 | bt_sk(sk)->flags = bt_sk(parent)->flags; |
bb58f747 | 1465 | |
715ec005 | 1466 | chan->chan_type = pchan->chan_type; |
0c1bc5c6 GP |
1467 | chan->imtu = pchan->imtu; |
1468 | chan->omtu = pchan->omtu; | |
b4450035 | 1469 | chan->conf_state = pchan->conf_state; |
0c1bc5c6 | 1470 | chan->mode = pchan->mode; |
47d1ec61 GP |
1471 | chan->fcs = pchan->fcs; |
1472 | chan->max_tx = pchan->max_tx; | |
1473 | chan->tx_win = pchan->tx_win; | |
6b3c7104 | 1474 | chan->tx_win_max = pchan->tx_win_max; |
4343478f | 1475 | chan->sec_level = pchan->sec_level; |
d57b0e8b | 1476 | chan->flags = pchan->flags; |
0cd75f7e JH |
1477 | chan->tx_credits = pchan->tx_credits; |
1478 | chan->rx_credits = pchan->rx_credits; | |
6230c9b4 | 1479 | |
7a8e5a31 JH |
1480 | if (chan->chan_type == L2CAP_CHAN_FIXED) { |
1481 | chan->scid = pchan->scid; | |
1482 | chan->dcid = pchan->scid; | |
1483 | } | |
1484 | ||
6230c9b4 | 1485 | security_sk_clone(parent, sk); |
bb58f747 | 1486 | } else { |
715ec005 GP |
1487 | switch (sk->sk_type) { |
1488 | case SOCK_RAW: | |
1489 | chan->chan_type = L2CAP_CHAN_RAW; | |
1490 | break; | |
1491 | case SOCK_DGRAM: | |
1492 | chan->chan_type = L2CAP_CHAN_CONN_LESS; | |
2edf870d | 1493 | bt_sk(sk)->skb_msg_name = l2cap_skb_msg_name; |
715ec005 GP |
1494 | break; |
1495 | case SOCK_SEQPACKET: | |
1496 | case SOCK_STREAM: | |
1497 | chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; | |
1498 | break; | |
1499 | } | |
1500 | ||
0c1bc5c6 GP |
1501 | chan->imtu = L2CAP_DEFAULT_MTU; |
1502 | chan->omtu = 0; | |
bb58f747 | 1503 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c6 | 1504 | chan->mode = L2CAP_MODE_ERTM; |
c1360a1c | 1505 | set_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
bb58f747 | 1506 | } else { |
0c1bc5c6 | 1507 | chan->mode = L2CAP_MODE_BASIC; |
bb58f747 | 1508 | } |
bd4b1653 AE |
1509 | |
1510 | l2cap_chan_set_defaults(chan); | |
bb58f747 GP |
1511 | } |
1512 | ||
1513 | /* Default config options */ | |
0c1bc5c6 | 1514 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e43 GP |
1515 | |
1516 | chan->data = sk; | |
1517 | chan->ops = &l2cap_chan_ops; | |
bb58f747 GP |
1518 | } |
1519 | ||
1520 | static struct proto l2cap_proto = { | |
1521 | .name = "L2CAP", | |
1522 | .owner = THIS_MODULE, | |
1523 | .obj_size = sizeof(struct l2cap_pinfo) | |
1524 | }; | |
1525 | ||
2d792818 GP |
1526 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
1527 | int proto, gfp_t prio) | |
bb58f747 GP |
1528 | { |
1529 | struct sock *sk; | |
dc50a06d | 1530 | struct l2cap_chan *chan; |
bb58f747 GP |
1531 | |
1532 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); | |
1533 | if (!sk) | |
1534 | return NULL; | |
1535 | ||
1536 | sock_init_data(sock, sk); | |
1537 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
1538 | ||
1539 | sk->sk_destruct = l2cap_sock_destruct; | |
ba13ccd9 | 1540 | sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; |
bb58f747 GP |
1541 | |
1542 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1543 | ||
1544 | sk->sk_protocol = proto; | |
1545 | sk->sk_state = BT_OPEN; | |
1546 | ||
eef1d9b6 | 1547 | chan = l2cap_chan_create(); |
dc50a06d | 1548 | if (!chan) { |
49dfbb91 | 1549 | sk_free(sk); |
dc50a06d GP |
1550 | return NULL; |
1551 | } | |
1552 | ||
61d6ef3e MM |
1553 | l2cap_chan_hold(chan); |
1554 | ||
dc50a06d GP |
1555 | l2cap_pi(sk)->chan = chan; |
1556 | ||
bb58f747 GP |
1557 | return sk; |
1558 | } | |
1559 | ||
1560 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
1561 | int kern) | |
1562 | { | |
1563 | struct sock *sk; | |
1564 | ||
1565 | BT_DBG("sock %p", sock); | |
1566 | ||
1567 | sock->state = SS_UNCONNECTED; | |
1568 | ||
1569 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
2d792818 | 1570 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
bb58f747 GP |
1571 | return -ESOCKTNOSUPPORT; |
1572 | ||
1573 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
1574 | return -EPERM; | |
1575 | ||
1576 | sock->ops = &l2cap_sock_ops; | |
1577 | ||
1578 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); | |
1579 | if (!sk) | |
1580 | return -ENOMEM; | |
1581 | ||
1582 | l2cap_sock_init(sk, NULL); | |
5b28d95c | 1583 | bt_sock_link(&l2cap_sk_list, sk); |
bb58f747 GP |
1584 | return 0; |
1585 | } | |
1586 | ||
cf2f90f5 | 1587 | static const struct proto_ops l2cap_sock_ops = { |
65390587 GP |
1588 | .family = PF_BLUETOOTH, |
1589 | .owner = THIS_MODULE, | |
1590 | .release = l2cap_sock_release, | |
1591 | .bind = l2cap_sock_bind, | |
1592 | .connect = l2cap_sock_connect, | |
1593 | .listen = l2cap_sock_listen, | |
1594 | .accept = l2cap_sock_accept, | |
1595 | .getname = l2cap_sock_getname, | |
1596 | .sendmsg = l2cap_sock_sendmsg, | |
1597 | .recvmsg = l2cap_sock_recvmsg, | |
1598 | .poll = bt_sock_poll, | |
1599 | .ioctl = bt_sock_ioctl, | |
1600 | .mmap = sock_no_mmap, | |
1601 | .socketpair = sock_no_socketpair, | |
1602 | .shutdown = l2cap_sock_shutdown, | |
1603 | .setsockopt = l2cap_sock_setsockopt, | |
1604 | .getsockopt = l2cap_sock_getsockopt | |
1605 | }; | |
1606 | ||
bb58f747 GP |
1607 | static const struct net_proto_family l2cap_sock_family_ops = { |
1608 | .family = PF_BLUETOOTH, | |
1609 | .owner = THIS_MODULE, | |
1610 | .create = l2cap_sock_create, | |
1611 | }; | |
1612 | ||
1613 | int __init l2cap_init_sockets(void) | |
1614 | { | |
e2174ca4 | 1615 | int err; |
bb58f747 | 1616 | |
e2174ca4 GP |
1617 | err = proto_register(&l2cap_proto, 0); |
1618 | if (err < 0) | |
1619 | return err; | |
bb58f747 | 1620 | |
e2174ca4 | 1621 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
5b28d95c MY |
1622 | if (err < 0) { |
1623 | BT_ERR("L2CAP socket registration failed"); | |
e2174ca4 | 1624 | goto error; |
5b28d95c MY |
1625 | } |
1626 | ||
b0316615 | 1627 | err = bt_procfs_init(&init_net, "l2cap", &l2cap_sk_list, |
2d792818 | 1628 | NULL); |
5b28d95c MY |
1629 | if (err < 0) { |
1630 | BT_ERR("Failed to create L2CAP proc file"); | |
1631 | bt_sock_unregister(BTPROTO_L2CAP); | |
1632 | goto error; | |
1633 | } | |
bb58f747 | 1634 | |
e2174ca4 | 1635 | BT_INFO("L2CAP socket layer initialized"); |
bb58f747 | 1636 | |
e2174ca4 | 1637 | return 0; |
bb58f747 GP |
1638 | |
1639 | error: | |
e2174ca4 GP |
1640 | proto_unregister(&l2cap_proto); |
1641 | return err; | |
bb58f747 GP |
1642 | } |
1643 | ||
1644 | void l2cap_cleanup_sockets(void) | |
1645 | { | |
5b28d95c | 1646 | bt_procfs_cleanup(&init_net, "l2cap"); |
5e9d7f86 | 1647 | bt_sock_unregister(BTPROTO_L2CAP); |
e2174ca4 | 1648 | proto_unregister(&l2cap_proto); |
bb58f747 | 1649 | } |