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Commit | Line | Data |
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bb58f747 GP |
1 | /* |
2 | BlueZ - Bluetooth protocol stack for Linux | |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> | |
5 | Copyright (C) 2010 Google Inc. | |
590051de | 6 | Copyright (C) 2011 ProFUSION Embedded Systems |
bb58f747 GP |
7 | |
8 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License version 2 as | |
12 | published by the Free Software Foundation; | |
13 | ||
14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
15 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
17 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
18 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES | |
19 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
20 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
21 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
22 | ||
23 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, | |
24 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
25 | SOFTWARE IS DISCLAIMED. | |
26 | */ | |
27 | ||
28 | /* Bluetooth L2CAP sockets. */ | |
29 | ||
9149761a | 30 | #include <linux/module.h> |
bc3b2d7f | 31 | #include <linux/export.h> |
6230c9b4 | 32 | |
bb58f747 | 33 | #include <net/bluetooth/bluetooth.h> |
33575df7 | 34 | #include <net/bluetooth/hci_core.h> |
bb58f747 | 35 | #include <net/bluetooth/l2cap.h> |
ac4b7236 MH |
36 | |
37 | #include "smp.h" | |
bb58f747 | 38 | |
9149761a JH |
39 | bool enable_lecoc; |
40 | ||
5b28d95c MY |
41 | static struct bt_sock_list l2cap_sk_list = { |
42 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) | |
43 | }; | |
44 | ||
cf2f90f5 | 45 | static const struct proto_ops l2cap_sock_ops; |
80808e43 | 46 | static void l2cap_sock_init(struct sock *sk, struct sock *parent); |
2d792818 GP |
47 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
48 | int proto, gfp_t prio); | |
cf2f90f5 | 49 | |
b3916db3 DH |
50 | bool l2cap_is_socket(struct socket *sock) |
51 | { | |
52 | return sock && sock->ops == &l2cap_sock_ops; | |
53 | } | |
54 | EXPORT_SYMBOL(l2cap_is_socket); | |
55 | ||
af6bcd82 GP |
56 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
57 | { | |
58 | struct sock *sk = sock->sk; | |
4343478f | 59 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
60 | struct sockaddr_l2 la; |
61 | int len, err = 0; | |
62 | ||
63 | BT_DBG("sk %p", sk); | |
64 | ||
65 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
66 | return -EINVAL; | |
67 | ||
68 | memset(&la, 0, sizeof(la)); | |
69 | len = min_t(unsigned int, sizeof(la), alen); | |
70 | memcpy(&la, addr, len); | |
71 | ||
b62f328b | 72 | if (la.l2_cid && la.l2_psm) |
af6bcd82 GP |
73 | return -EINVAL; |
74 | ||
80c1a2e7 JH |
75 | if (!bdaddr_type_is_valid(la.l2_bdaddr_type)) |
76 | return -EINVAL; | |
77 | ||
bfe4655f | 78 | if (bdaddr_type_is_le(la.l2_bdaddr_type)) { |
9149761a | 79 | if (!enable_lecoc && la.l2_psm) |
bfe4655f JH |
80 | return -EINVAL; |
81 | /* We only allow ATT user space socket */ | |
9149761a JH |
82 | if (la.l2_cid && |
83 | la.l2_cid != __constant_cpu_to_le16(L2CAP_CID_ATT)) | |
bfe4655f JH |
84 | return -EINVAL; |
85 | } | |
86 | ||
af6bcd82 GP |
87 | lock_sock(sk); |
88 | ||
89 | if (sk->sk_state != BT_OPEN) { | |
90 | err = -EBADFD; | |
91 | goto done; | |
92 | } | |
93 | ||
94 | if (la.l2_psm) { | |
95 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
96 | ||
97 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
98 | if ((psm & 0x0101) != 0x0001) { | |
99 | err = -EINVAL; | |
100 | goto done; | |
101 | } | |
102 | ||
103 | /* Restrict usage of well-known PSMs */ | |
104 | if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { | |
105 | err = -EACCES; | |
106 | goto done; | |
107 | } | |
108 | } | |
109 | ||
9e4425ff | 110 | if (la.l2_cid) |
6e4aff10 | 111 | err = l2cap_add_scid(chan, __le16_to_cpu(la.l2_cid)); |
9e4425ff GP |
112 | else |
113 | err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm); | |
af6bcd82 | 114 | |
9e4425ff GP |
115 | if (err < 0) |
116 | goto done; | |
af6bcd82 | 117 | |
6a974b50 | 118 | switch (chan->chan_type) { |
3124b843 MH |
119 | case L2CAP_CHAN_CONN_LESS: |
120 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_3DSP) | |
121 | chan->sec_level = BT_SECURITY_SDP; | |
122 | break; | |
6a974b50 MH |
123 | case L2CAP_CHAN_CONN_ORIENTED: |
124 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_SDP || | |
125 | __le16_to_cpu(la.l2_psm) == L2CAP_PSM_RFCOMM) | |
126 | chan->sec_level = BT_SECURITY_SDP; | |
127 | break; | |
128 | } | |
b62f328b | 129 | |
7eafc59e | 130 | bacpy(&chan->src, &la.l2_bdaddr); |
4f1654e0 | 131 | chan->src_type = la.l2_bdaddr_type; |
89bc500e | 132 | |
38319713 JH |
133 | if (chan->psm && bdaddr_type_is_le(chan->src_type)) |
134 | l2cap_le_flowctl_init(chan); | |
135 | ||
89bc500e | 136 | chan->state = BT_BOUND; |
9e4425ff | 137 | sk->sk_state = BT_BOUND; |
af6bcd82 GP |
138 | |
139 | done: | |
140 | release_sock(sk); | |
141 | return err; | |
142 | } | |
143 | ||
2d792818 GP |
144 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, |
145 | int alen, int flags) | |
4e34c50b GP |
146 | { |
147 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 148 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
4e34c50b GP |
149 | struct sockaddr_l2 la; |
150 | int len, err = 0; | |
151 | ||
152 | BT_DBG("sk %p", sk); | |
153 | ||
154 | if (!addr || alen < sizeof(addr->sa_family) || | |
155 | addr->sa_family != AF_BLUETOOTH) | |
156 | return -EINVAL; | |
157 | ||
158 | memset(&la, 0, sizeof(la)); | |
159 | len = min_t(unsigned int, sizeof(la), alen); | |
160 | memcpy(&la, addr, len); | |
161 | ||
acd7d370 | 162 | if (la.l2_cid && la.l2_psm) |
4e34c50b GP |
163 | return -EINVAL; |
164 | ||
80c1a2e7 JH |
165 | if (!bdaddr_type_is_valid(la.l2_bdaddr_type)) |
166 | return -EINVAL; | |
167 | ||
eb622495 JH |
168 | /* Check that the socket wasn't bound to something that |
169 | * conflicts with the address given to connect(). If chan->src | |
170 | * is BDADDR_ANY it means bind() was never used, in which case | |
171 | * chan->src_type and la.l2_bdaddr_type do not need to match. | |
172 | */ | |
173 | if (chan->src_type == BDADDR_BREDR && bacmp(&chan->src, BDADDR_ANY) && | |
174 | bdaddr_type_is_le(la.l2_bdaddr_type)) { | |
175 | /* Old user space versions will try to incorrectly bind | |
176 | * the ATT socket using BDADDR_BREDR. We need to accept | |
177 | * this and fix up the source address type only when | |
178 | * both the source CID and destination CID indicate | |
179 | * ATT. Anything else is an invalid combination. | |
180 | */ | |
181 | if (chan->scid != L2CAP_CID_ATT || | |
182 | la.l2_cid != __constant_cpu_to_le16(L2CAP_CID_ATT)) | |
183 | return -EINVAL; | |
184 | ||
185 | /* We don't have the hdev available here to make a | |
186 | * better decision on random vs public, but since all | |
187 | * user space versions that exhibit this issue anyway do | |
188 | * not support random local addresses assuming public | |
189 | * here is good enough. | |
190 | */ | |
191 | chan->src_type = BDADDR_LE_PUBLIC; | |
192 | } | |
1f209383 JH |
193 | |
194 | if (chan->src_type != BDADDR_BREDR && la.l2_bdaddr_type == BDADDR_BREDR) | |
195 | return -EINVAL; | |
196 | ||
bfe4655f | 197 | if (bdaddr_type_is_le(la.l2_bdaddr_type)) { |
9149761a | 198 | if (!enable_lecoc && la.l2_psm) |
bfe4655f JH |
199 | return -EINVAL; |
200 | /* We only allow ATT user space socket */ | |
9149761a JH |
201 | if (la.l2_cid && |
202 | la.l2_cid != __constant_cpu_to_le16(L2CAP_CID_ATT)) | |
bfe4655f JH |
203 | return -EINVAL; |
204 | } | |
205 | ||
38319713 JH |
206 | if (chan->psm && bdaddr_type_is_le(chan->src_type)) |
207 | l2cap_le_flowctl_init(chan); | |
208 | ||
6e4aff10 | 209 | err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid), |
8e9f9892 | 210 | &la.l2_bdaddr, la.l2_bdaddr_type); |
4e34c50b | 211 | if (err) |
b3fb611e | 212 | return err; |
4e34c50b | 213 | |
6be36555 AE |
214 | lock_sock(sk); |
215 | ||
4e34c50b | 216 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
2d792818 | 217 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
b3fb611e AE |
218 | |
219 | release_sock(sk); | |
220 | ||
4e34c50b GP |
221 | return err; |
222 | } | |
223 | ||
af6bcd82 GP |
224 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
225 | { | |
226 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 227 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
228 | int err = 0; |
229 | ||
230 | BT_DBG("sk %p backlog %d", sk, backlog); | |
231 | ||
232 | lock_sock(sk); | |
233 | ||
6b3af733 | 234 | if (sk->sk_state != BT_BOUND) { |
af6bcd82 GP |
235 | err = -EBADFD; |
236 | goto done; | |
237 | } | |
238 | ||
6b3af733 MH |
239 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) { |
240 | err = -EINVAL; | |
241 | goto done; | |
242 | } | |
243 | ||
0c1bc5c6 | 244 | switch (chan->mode) { |
af6bcd82 | 245 | case L2CAP_MODE_BASIC: |
38319713 | 246 | case L2CAP_MODE_LE_FLOWCTL: |
af6bcd82 GP |
247 | break; |
248 | case L2CAP_MODE_ERTM: | |
249 | case L2CAP_MODE_STREAMING: | |
250 | if (!disable_ertm) | |
251 | break; | |
252 | /* fall through */ | |
253 | default: | |
254 | err = -ENOTSUPP; | |
255 | goto done; | |
256 | } | |
257 | ||
af6bcd82 GP |
258 | sk->sk_max_ack_backlog = backlog; |
259 | sk->sk_ack_backlog = 0; | |
89bc500e GP |
260 | |
261 | chan->state = BT_LISTEN; | |
af6bcd82 GP |
262 | sk->sk_state = BT_LISTEN; |
263 | ||
264 | done: | |
265 | release_sock(sk); | |
266 | return err; | |
267 | } | |
268 | ||
2d792818 GP |
269 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, |
270 | int flags) | |
c47b7c72 GP |
271 | { |
272 | DECLARE_WAITQUEUE(wait, current); | |
273 | struct sock *sk = sock->sk, *nsk; | |
274 | long timeo; | |
275 | int err = 0; | |
276 | ||
277 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
278 | ||
c47b7c72 GP |
279 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
280 | ||
281 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
282 | ||
283 | /* Wait for an incoming connection. (wake-one). */ | |
284 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
f9a3c20a | 285 | while (1) { |
c47b7c72 | 286 | set_current_state(TASK_INTERRUPTIBLE); |
f9a3c20a PH |
287 | |
288 | if (sk->sk_state != BT_LISTEN) { | |
289 | err = -EBADFD; | |
c47b7c72 GP |
290 | break; |
291 | } | |
292 | ||
f9a3c20a PH |
293 | nsk = bt_accept_dequeue(sk, newsock); |
294 | if (nsk) | |
295 | break; | |
c47b7c72 | 296 | |
f9a3c20a PH |
297 | if (!timeo) { |
298 | err = -EAGAIN; | |
c47b7c72 GP |
299 | break; |
300 | } | |
301 | ||
302 | if (signal_pending(current)) { | |
303 | err = sock_intr_errno(timeo); | |
304 | break; | |
305 | } | |
f9a3c20a PH |
306 | |
307 | release_sock(sk); | |
308 | timeo = schedule_timeout(timeo); | |
309 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
c47b7c72 | 310 | } |
f9a3c20a | 311 | __set_current_state(TASK_RUNNING); |
c47b7c72 GP |
312 | remove_wait_queue(sk_sleep(sk), &wait); |
313 | ||
314 | if (err) | |
315 | goto done; | |
316 | ||
317 | newsock->state = SS_CONNECTED; | |
318 | ||
319 | BT_DBG("new socket %p", nsk); | |
320 | ||
321 | done: | |
322 | release_sock(sk); | |
323 | return err; | |
324 | } | |
325 | ||
2d792818 GP |
326 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, |
327 | int *len, int peer) | |
d7175d55 GP |
328 | { |
329 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
330 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 331 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
d7175d55 GP |
332 | |
333 | BT_DBG("sock %p, sk %p", sock, sk); | |
334 | ||
792039c7 | 335 | memset(la, 0, sizeof(struct sockaddr_l2)); |
d7175d55 GP |
336 | addr->sa_family = AF_BLUETOOTH; |
337 | *len = sizeof(struct sockaddr_l2); | |
338 | ||
339 | if (peer) { | |
fe4128e0 | 340 | la->l2_psm = chan->psm; |
7eafc59e | 341 | bacpy(&la->l2_bdaddr, &chan->dst); |
fe4128e0 | 342 | la->l2_cid = cpu_to_le16(chan->dcid); |
4f1654e0 | 343 | la->l2_bdaddr_type = chan->dst_type; |
d7175d55 | 344 | } else { |
0c1bc5c6 | 345 | la->l2_psm = chan->sport; |
7eafc59e | 346 | bacpy(&la->l2_bdaddr, &chan->src); |
fe4128e0 | 347 | la->l2_cid = cpu_to_le16(chan->scid); |
4f1654e0 | 348 | la->l2_bdaddr_type = chan->src_type; |
d7175d55 GP |
349 | } |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
2d792818 GP |
354 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, |
355 | char __user *optval, int __user *optlen) | |
99f4808d GP |
356 | { |
357 | struct sock *sk = sock->sk; | |
4343478f | 358 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d GP |
359 | struct l2cap_options opts; |
360 | struct l2cap_conninfo cinfo; | |
361 | int len, err = 0; | |
362 | u32 opt; | |
363 | ||
364 | BT_DBG("sk %p", sk); | |
365 | ||
366 | if (get_user(len, optlen)) | |
367 | return -EFAULT; | |
368 | ||
369 | lock_sock(sk); | |
370 | ||
371 | switch (optname) { | |
372 | case L2CAP_OPTIONS: | |
e3fb592b | 373 | memset(&opts, 0, sizeof(opts)); |
0c1bc5c6 GP |
374 | opts.imtu = chan->imtu; |
375 | opts.omtu = chan->omtu; | |
376 | opts.flush_to = chan->flush_to; | |
377 | opts.mode = chan->mode; | |
47d1ec61 GP |
378 | opts.fcs = chan->fcs; |
379 | opts.max_tx = chan->max_tx; | |
6327eb98 | 380 | opts.txwin_size = chan->tx_win; |
99f4808d GP |
381 | |
382 | len = min_t(unsigned int, len, sizeof(opts)); | |
383 | if (copy_to_user(optval, (char *) &opts, len)) | |
384 | err = -EFAULT; | |
385 | ||
386 | break; | |
387 | ||
388 | case L2CAP_LM: | |
4343478f | 389 | switch (chan->sec_level) { |
99f4808d GP |
390 | case BT_SECURITY_LOW: |
391 | opt = L2CAP_LM_AUTH; | |
392 | break; | |
393 | case BT_SECURITY_MEDIUM: | |
394 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
395 | break; | |
396 | case BT_SECURITY_HIGH: | |
397 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
2d792818 | 398 | L2CAP_LM_SECURE; |
99f4808d GP |
399 | break; |
400 | default: | |
401 | opt = 0; | |
402 | break; | |
403 | } | |
404 | ||
43bd0f32 | 405 | if (test_bit(FLAG_ROLE_SWITCH, &chan->flags)) |
99f4808d GP |
406 | opt |= L2CAP_LM_MASTER; |
407 | ||
ecf61bdb | 408 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
99f4808d GP |
409 | opt |= L2CAP_LM_RELIABLE; |
410 | ||
411 | if (put_user(opt, (u32 __user *) optval)) | |
412 | err = -EFAULT; | |
413 | break; | |
414 | ||
415 | case L2CAP_CONNINFO: | |
416 | if (sk->sk_state != BT_CONNECTED && | |
c5daa683 GP |
417 | !(sk->sk_state == BT_CONNECT2 && |
418 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { | |
99f4808d GP |
419 | err = -ENOTCONN; |
420 | break; | |
421 | } | |
422 | ||
8d03e971 | 423 | memset(&cinfo, 0, sizeof(cinfo)); |
8c1d787b GP |
424 | cinfo.hci_handle = chan->conn->hcon->handle; |
425 | memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); | |
99f4808d GP |
426 | |
427 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
428 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
429 | err = -EFAULT; | |
430 | ||
431 | break; | |
432 | ||
433 | default: | |
434 | err = -ENOPROTOOPT; | |
435 | break; | |
436 | } | |
437 | ||
438 | release_sock(sk); | |
439 | return err; | |
440 | } | |
441 | ||
2d792818 GP |
442 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, |
443 | char __user *optval, int __user *optlen) | |
99f4808d GP |
444 | { |
445 | struct sock *sk = sock->sk; | |
4343478f | 446 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d | 447 | struct bt_security sec; |
14b12d0b | 448 | struct bt_power pwr; |
99f4808d GP |
449 | int len, err = 0; |
450 | ||
451 | BT_DBG("sk %p", sk); | |
452 | ||
453 | if (level == SOL_L2CAP) | |
454 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
455 | ||
456 | if (level != SOL_BLUETOOTH) | |
457 | return -ENOPROTOOPT; | |
458 | ||
459 | if (get_user(len, optlen)) | |
460 | return -EFAULT; | |
461 | ||
462 | lock_sock(sk); | |
463 | ||
464 | switch (optname) { | |
465 | case BT_SECURITY: | |
715ec005 | 466 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
2d792818 | 467 | chan->chan_type != L2CAP_CHAN_RAW) { |
99f4808d GP |
468 | err = -EINVAL; |
469 | break; | |
470 | } | |
471 | ||
8f360119 | 472 | memset(&sec, 0, sizeof(sec)); |
85e34368 | 473 | if (chan->conn) { |
c6585a4d | 474 | sec.level = chan->conn->hcon->sec_level; |
99f4808d | 475 | |
85e34368 AE |
476 | if (sk->sk_state == BT_CONNECTED) |
477 | sec.key_size = chan->conn->hcon->enc_key_size; | |
478 | } else { | |
479 | sec.level = chan->sec_level; | |
480 | } | |
8f360119 | 481 | |
99f4808d GP |
482 | len = min_t(unsigned int, len, sizeof(sec)); |
483 | if (copy_to_user(optval, (char *) &sec, len)) | |
484 | err = -EFAULT; | |
485 | ||
486 | break; | |
487 | ||
488 | case BT_DEFER_SETUP: | |
489 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
490 | err = -EINVAL; | |
491 | break; | |
492 | } | |
493 | ||
c5daa683 GP |
494 | if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), |
495 | (u32 __user *) optval)) | |
99f4808d GP |
496 | err = -EFAULT; |
497 | ||
498 | break; | |
499 | ||
500 | case BT_FLUSHABLE: | |
d57b0e8b | 501 | if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags), |
2d792818 | 502 | (u32 __user *) optval)) |
99f4808d GP |
503 | err = -EFAULT; |
504 | ||
505 | break; | |
506 | ||
14b12d0b JG |
507 | case BT_POWER: |
508 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
2d792818 | 509 | && sk->sk_type != SOCK_RAW) { |
14b12d0b JG |
510 | err = -EINVAL; |
511 | break; | |
512 | } | |
513 | ||
15770b1a | 514 | pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
14b12d0b JG |
515 | |
516 | len = min_t(unsigned int, len, sizeof(pwr)); | |
517 | if (copy_to_user(optval, (char *) &pwr, len)) | |
518 | err = -EFAULT; | |
519 | ||
520 | break; | |
521 | ||
2ea66482 | 522 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
523 | if (put_user(chan->chan_policy, (u32 __user *) optval)) |
524 | err = -EFAULT; | |
525 | break; | |
526 | ||
99f4808d GP |
527 | default: |
528 | err = -ENOPROTOOPT; | |
529 | break; | |
530 | } | |
531 | ||
532 | release_sock(sk); | |
533 | return err; | |
534 | } | |
535 | ||
682877c3 AG |
536 | static bool l2cap_valid_mtu(struct l2cap_chan *chan, u16 mtu) |
537 | { | |
538 | switch (chan->scid) { | |
073d1cf3 | 539 | case L2CAP_CID_ATT: |
8c3a4f00 | 540 | if (mtu < L2CAP_LE_MIN_MTU) |
682877c3 AG |
541 | return false; |
542 | break; | |
543 | ||
544 | default: | |
545 | if (mtu < L2CAP_DEFAULT_MIN_MTU) | |
546 | return false; | |
547 | } | |
548 | ||
549 | return true; | |
550 | } | |
551 | ||
2d792818 GP |
552 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, |
553 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
554 | { |
555 | struct sock *sk = sock->sk; | |
b4450035 | 556 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 GP |
557 | struct l2cap_options opts; |
558 | int len, err = 0; | |
559 | u32 opt; | |
560 | ||
561 | BT_DBG("sk %p", sk); | |
562 | ||
563 | lock_sock(sk); | |
564 | ||
565 | switch (optname) { | |
566 | case L2CAP_OPTIONS: | |
567 | if (sk->sk_state == BT_CONNECTED) { | |
568 | err = -EINVAL; | |
569 | break; | |
570 | } | |
571 | ||
0c1bc5c6 GP |
572 | opts.imtu = chan->imtu; |
573 | opts.omtu = chan->omtu; | |
574 | opts.flush_to = chan->flush_to; | |
575 | opts.mode = chan->mode; | |
47d1ec61 GP |
576 | opts.fcs = chan->fcs; |
577 | opts.max_tx = chan->max_tx; | |
6327eb98 | 578 | opts.txwin_size = chan->tx_win; |
33575df7 GP |
579 | |
580 | len = min_t(unsigned int, sizeof(opts), optlen); | |
581 | if (copy_from_user((char *) &opts, optval, len)) { | |
582 | err = -EFAULT; | |
583 | break; | |
584 | } | |
585 | ||
6327eb98 | 586 | if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) { |
33575df7 GP |
587 | err = -EINVAL; |
588 | break; | |
589 | } | |
590 | ||
682877c3 AG |
591 | if (!l2cap_valid_mtu(chan, opts.imtu)) { |
592 | err = -EINVAL; | |
593 | break; | |
594 | } | |
595 | ||
0c1bc5c6 GP |
596 | chan->mode = opts.mode; |
597 | switch (chan->mode) { | |
38319713 JH |
598 | case L2CAP_MODE_LE_FLOWCTL: |
599 | break; | |
33575df7 | 600 | case L2CAP_MODE_BASIC: |
c1360a1c | 601 | clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
33575df7 GP |
602 | break; |
603 | case L2CAP_MODE_ERTM: | |
604 | case L2CAP_MODE_STREAMING: | |
605 | if (!disable_ertm) | |
606 | break; | |
607 | /* fall through */ | |
608 | default: | |
609 | err = -EINVAL; | |
610 | break; | |
611 | } | |
612 | ||
0c1bc5c6 GP |
613 | chan->imtu = opts.imtu; |
614 | chan->omtu = opts.omtu; | |
47d1ec61 GP |
615 | chan->fcs = opts.fcs; |
616 | chan->max_tx = opts.max_tx; | |
6327eb98 | 617 | chan->tx_win = opts.txwin_size; |
12d59781 | 618 | chan->flush_to = opts.flush_to; |
33575df7 GP |
619 | break; |
620 | ||
621 | case L2CAP_LM: | |
622 | if (get_user(opt, (u32 __user *) optval)) { | |
623 | err = -EFAULT; | |
624 | break; | |
625 | } | |
626 | ||
627 | if (opt & L2CAP_LM_AUTH) | |
4343478f | 628 | chan->sec_level = BT_SECURITY_LOW; |
33575df7 | 629 | if (opt & L2CAP_LM_ENCRYPT) |
4343478f | 630 | chan->sec_level = BT_SECURITY_MEDIUM; |
33575df7 | 631 | if (opt & L2CAP_LM_SECURE) |
4343478f | 632 | chan->sec_level = BT_SECURITY_HIGH; |
33575df7 | 633 | |
43bd0f32 AE |
634 | if (opt & L2CAP_LM_MASTER) |
635 | set_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
636 | else | |
637 | clear_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
ecf61bdb AE |
638 | |
639 | if (opt & L2CAP_LM_RELIABLE) | |
640 | set_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
641 | else | |
642 | clear_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
33575df7 GP |
643 | break; |
644 | ||
645 | default: | |
646 | err = -ENOPROTOOPT; | |
647 | break; | |
648 | } | |
649 | ||
650 | release_sock(sk); | |
651 | return err; | |
652 | } | |
653 | ||
2d792818 GP |
654 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, |
655 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
656 | { |
657 | struct sock *sk = sock->sk; | |
4343478f | 658 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 | 659 | struct bt_security sec; |
14b12d0b | 660 | struct bt_power pwr; |
f1cb9af5 | 661 | struct l2cap_conn *conn; |
33575df7 GP |
662 | int len, err = 0; |
663 | u32 opt; | |
664 | ||
665 | BT_DBG("sk %p", sk); | |
666 | ||
667 | if (level == SOL_L2CAP) | |
668 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
669 | ||
670 | if (level != SOL_BLUETOOTH) | |
671 | return -ENOPROTOOPT; | |
672 | ||
673 | lock_sock(sk); | |
674 | ||
675 | switch (optname) { | |
676 | case BT_SECURITY: | |
715ec005 | 677 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
2d792818 | 678 | chan->chan_type != L2CAP_CHAN_RAW) { |
33575df7 GP |
679 | err = -EINVAL; |
680 | break; | |
681 | } | |
682 | ||
683 | sec.level = BT_SECURITY_LOW; | |
684 | ||
685 | len = min_t(unsigned int, sizeof(sec), optlen); | |
686 | if (copy_from_user((char *) &sec, optval, len)) { | |
687 | err = -EFAULT; | |
688 | break; | |
689 | } | |
690 | ||
691 | if (sec.level < BT_SECURITY_LOW || | |
2d792818 | 692 | sec.level > BT_SECURITY_HIGH) { |
33575df7 GP |
693 | err = -EINVAL; |
694 | break; | |
695 | } | |
696 | ||
4343478f | 697 | chan->sec_level = sec.level; |
f1cb9af5 | 698 | |
0bee1d60 GP |
699 | if (!chan->conn) |
700 | break; | |
701 | ||
f1cb9af5 | 702 | conn = chan->conn; |
0bee1d60 GP |
703 | |
704 | /*change security for LE channels */ | |
073d1cf3 | 705 | if (chan->scid == L2CAP_CID_ATT) { |
f1cb9af5 VCG |
706 | if (!conn->hcon->out) { |
707 | err = -EINVAL; | |
708 | break; | |
709 | } | |
710 | ||
cc110922 | 711 | if (smp_conn_security(conn->hcon, sec.level)) |
f1cb9af5 | 712 | break; |
f1cb9af5 | 713 | sk->sk_state = BT_CONFIG; |
3542b854 | 714 | chan->state = BT_CONFIG; |
0bee1d60 | 715 | |
a7d7723a GP |
716 | /* or for ACL link */ |
717 | } else if ((sk->sk_state == BT_CONNECT2 && | |
2d792818 | 718 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) || |
a7d7723a GP |
719 | sk->sk_state == BT_CONNECTED) { |
720 | if (!l2cap_chan_check_security(chan)) | |
c5daa683 | 721 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
a7d7723a GP |
722 | else |
723 | sk->sk_state_change(sk); | |
0bee1d60 GP |
724 | } else { |
725 | err = -EINVAL; | |
f1cb9af5 | 726 | } |
33575df7 GP |
727 | break; |
728 | ||
729 | case BT_DEFER_SETUP: | |
730 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
731 | err = -EINVAL; | |
732 | break; | |
733 | } | |
734 | ||
735 | if (get_user(opt, (u32 __user *) optval)) { | |
736 | err = -EFAULT; | |
737 | break; | |
738 | } | |
739 | ||
bdc25783 | 740 | if (opt) { |
c5daa683 | 741 | set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); |
bdc25783 MH |
742 | set_bit(FLAG_DEFER_SETUP, &chan->flags); |
743 | } else { | |
c5daa683 | 744 | clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); |
bdc25783 MH |
745 | clear_bit(FLAG_DEFER_SETUP, &chan->flags); |
746 | } | |
33575df7 GP |
747 | break; |
748 | ||
749 | case BT_FLUSHABLE: | |
750 | if (get_user(opt, (u32 __user *) optval)) { | |
751 | err = -EFAULT; | |
752 | break; | |
753 | } | |
754 | ||
755 | if (opt > BT_FLUSHABLE_ON) { | |
756 | err = -EINVAL; | |
757 | break; | |
758 | } | |
759 | ||
760 | if (opt == BT_FLUSHABLE_OFF) { | |
c1f23a2b | 761 | conn = chan->conn; |
25985edc | 762 | /* proceed further only when we have l2cap_conn and |
33575df7 GP |
763 | No Flush support in the LM */ |
764 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { | |
765 | err = -EINVAL; | |
766 | break; | |
767 | } | |
768 | } | |
769 | ||
d57b0e8b AE |
770 | if (opt) |
771 | set_bit(FLAG_FLUSHABLE, &chan->flags); | |
772 | else | |
773 | clear_bit(FLAG_FLUSHABLE, &chan->flags); | |
33575df7 GP |
774 | break; |
775 | ||
14b12d0b JG |
776 | case BT_POWER: |
777 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && | |
2d792818 | 778 | chan->chan_type != L2CAP_CHAN_RAW) { |
14b12d0b JG |
779 | err = -EINVAL; |
780 | break; | |
781 | } | |
782 | ||
783 | pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; | |
784 | ||
785 | len = min_t(unsigned int, sizeof(pwr), optlen); | |
786 | if (copy_from_user((char *) &pwr, optval, len)) { | |
787 | err = -EFAULT; | |
788 | break; | |
789 | } | |
15770b1a AE |
790 | |
791 | if (pwr.force_active) | |
792 | set_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
793 | else | |
794 | clear_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
14b12d0b JG |
795 | break; |
796 | ||
2ea66482 | 797 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
798 | if (get_user(opt, (u32 __user *) optval)) { |
799 | err = -EFAULT; | |
800 | break; | |
801 | } | |
802 | ||
803 | if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) { | |
804 | err = -EINVAL; | |
805 | break; | |
806 | } | |
807 | ||
808 | if (chan->mode != L2CAP_MODE_ERTM && | |
2d792818 | 809 | chan->mode != L2CAP_MODE_STREAMING) { |
2ea66482 MM |
810 | err = -EOPNOTSUPP; |
811 | break; | |
812 | } | |
813 | ||
814 | chan->chan_policy = (u8) opt; | |
3f7a56c4 MM |
815 | |
816 | if (sk->sk_state == BT_CONNECTED && | |
817 | chan->move_role == L2CAP_MOVE_ROLE_NONE) | |
818 | l2cap_move_start(chan); | |
819 | ||
14b12d0b JG |
820 | break; |
821 | ||
33575df7 GP |
822 | default: |
823 | err = -ENOPROTOOPT; | |
824 | break; | |
825 | } | |
826 | ||
827 | release_sock(sk); | |
828 | return err; | |
829 | } | |
fd83ccdb | 830 | |
2d792818 GP |
831 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
832 | struct msghdr *msg, size_t len) | |
fd83ccdb GP |
833 | { |
834 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 835 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb GP |
836 | int err; |
837 | ||
838 | BT_DBG("sock %p, sk %p", sock, sk); | |
839 | ||
840 | err = sock_error(sk); | |
841 | if (err) | |
842 | return err; | |
843 | ||
844 | if (msg->msg_flags & MSG_OOB) | |
845 | return -EOPNOTSUPP; | |
846 | ||
a6a5568c | 847 | if (sk->sk_state != BT_CONNECTED) |
9a91a04a | 848 | return -ENOTCONN; |
fd83ccdb | 849 | |
e793dcf0 JH |
850 | lock_sock(sk); |
851 | err = bt_sock_wait_ready(sk, msg->msg_flags); | |
852 | release_sock(sk); | |
853 | if (err) | |
854 | return err; | |
855 | ||
a6a5568c | 856 | l2cap_chan_lock(chan); |
5e59b791 | 857 | err = l2cap_chan_send(chan, msg, len, sk->sk_priority); |
a6a5568c | 858 | l2cap_chan_unlock(chan); |
fd83ccdb | 859 | |
fd83ccdb GP |
860 | return err; |
861 | } | |
33575df7 | 862 | |
2d792818 GP |
863 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
864 | struct msghdr *msg, size_t len, int flags) | |
68983259 GP |
865 | { |
866 | struct sock *sk = sock->sk; | |
e328140f MM |
867 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
868 | int err; | |
68983259 GP |
869 | |
870 | lock_sock(sk); | |
871 | ||
c5daa683 GP |
872 | if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP, |
873 | &bt_sk(sk)->flags)) { | |
38319713 JH |
874 | if (bdaddr_type_is_le(pi->chan->src_type)) { |
875 | sk->sk_state = BT_CONNECTED; | |
876 | pi->chan->state = BT_CONNECTED; | |
877 | __l2cap_le_connect_rsp_defer(pi->chan); | |
878 | } else { | |
879 | sk->sk_state = BT_CONFIG; | |
880 | pi->chan->state = BT_CONFIG; | |
881 | __l2cap_connect_rsp_defer(pi->chan); | |
882 | } | |
8c1d787b | 883 | |
970871bc JH |
884 | err = 0; |
885 | goto done; | |
68983259 GP |
886 | } |
887 | ||
888 | release_sock(sk); | |
889 | ||
890 | if (sock->type == SOCK_STREAM) | |
e328140f MM |
891 | err = bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); |
892 | else | |
893 | err = bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
894 | ||
895 | if (pi->chan->mode != L2CAP_MODE_ERTM) | |
896 | return err; | |
897 | ||
898 | /* Attempt to put pending rx data in the socket buffer */ | |
899 | ||
900 | lock_sock(sk); | |
901 | ||
902 | if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state)) | |
903 | goto done; | |
904 | ||
905 | if (pi->rx_busy_skb) { | |
906 | if (!sock_queue_rcv_skb(sk, pi->rx_busy_skb)) | |
907 | pi->rx_busy_skb = NULL; | |
908 | else | |
909 | goto done; | |
910 | } | |
911 | ||
912 | /* Restore data flow when half of the receive buffer is | |
913 | * available. This avoids resending large numbers of | |
914 | * frames. | |
915 | */ | |
916 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1) | |
917 | l2cap_chan_busy(pi->chan, 0); | |
68983259 | 918 | |
e328140f MM |
919 | done: |
920 | release_sock(sk); | |
921 | return err; | |
68983259 GP |
922 | } |
923 | ||
05fc1576 GP |
924 | /* Kill socket (only if zapped and orphan) |
925 | * Must be called on unlocked socket. | |
926 | */ | |
ba3bd0ee | 927 | static void l2cap_sock_kill(struct sock *sk) |
05fc1576 GP |
928 | { |
929 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
930 | return; | |
931 | ||
e05dcc32 | 932 | BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state)); |
05fc1576 GP |
933 | |
934 | /* Kill poor orphan */ | |
6ff5abbf | 935 | |
4af66c69 | 936 | l2cap_chan_put(l2cap_pi(sk)->chan); |
05fc1576 GP |
937 | sock_set_flag(sk, SOCK_DEAD); |
938 | sock_put(sk); | |
939 | } | |
940 | ||
dc25306b GP |
941 | static int __l2cap_wait_ack(struct sock *sk) |
942 | { | |
943 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
944 | DECLARE_WAITQUEUE(wait, current); | |
945 | int err = 0; | |
946 | int timeo = HZ/5; | |
947 | ||
948 | add_wait_queue(sk_sleep(sk), &wait); | |
949 | set_current_state(TASK_INTERRUPTIBLE); | |
950 | while (chan->unacked_frames > 0 && chan->conn) { | |
951 | if (!timeo) | |
952 | timeo = HZ/5; | |
953 | ||
954 | if (signal_pending(current)) { | |
955 | err = sock_intr_errno(timeo); | |
956 | break; | |
957 | } | |
958 | ||
959 | release_sock(sk); | |
960 | timeo = schedule_timeout(timeo); | |
961 | lock_sock(sk); | |
962 | set_current_state(TASK_INTERRUPTIBLE); | |
963 | ||
964 | err = sock_error(sk); | |
965 | if (err) | |
966 | break; | |
967 | } | |
968 | set_current_state(TASK_RUNNING); | |
969 | remove_wait_queue(sk_sleep(sk), &wait); | |
970 | return err; | |
971 | } | |
972 | ||
dcba0dba GP |
973 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
974 | { | |
975 | struct sock *sk = sock->sk; | |
7ddb6e0f | 976 | struct l2cap_chan *chan; |
3df91ea2 | 977 | struct l2cap_conn *conn; |
dcba0dba GP |
978 | int err = 0; |
979 | ||
980 | BT_DBG("sock %p, sk %p", sock, sk); | |
981 | ||
982 | if (!sk) | |
983 | return 0; | |
984 | ||
7ddb6e0f | 985 | chan = l2cap_pi(sk)->chan; |
3df91ea2 AE |
986 | conn = chan->conn; |
987 | ||
988 | if (conn) | |
989 | mutex_lock(&conn->chan_lock); | |
7ddb6e0f | 990 | |
6be36555 | 991 | l2cap_chan_lock(chan); |
dcba0dba | 992 | lock_sock(sk); |
6be36555 | 993 | |
dcba0dba | 994 | if (!sk->sk_shutdown) { |
0c1bc5c6 | 995 | if (chan->mode == L2CAP_MODE_ERTM) |
dcba0dba GP |
996 | err = __l2cap_wait_ack(sk); |
997 | ||
998 | sk->sk_shutdown = SHUTDOWN_MASK; | |
3df91ea2 | 999 | |
6be36555 | 1000 | release_sock(sk); |
0f852724 | 1001 | l2cap_chan_close(chan, 0); |
6be36555 | 1002 | lock_sock(sk); |
dcba0dba GP |
1003 | |
1004 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
1005 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
2d792818 | 1006 | sk->sk_lingertime); |
dcba0dba GP |
1007 | } |
1008 | ||
1009 | if (!err && sk->sk_err) | |
1010 | err = -sk->sk_err; | |
1011 | ||
1012 | release_sock(sk); | |
6be36555 | 1013 | l2cap_chan_unlock(chan); |
3df91ea2 AE |
1014 | |
1015 | if (conn) | |
1016 | mutex_unlock(&conn->chan_lock); | |
1017 | ||
dcba0dba GP |
1018 | return err; |
1019 | } | |
1020 | ||
554f05bb GP |
1021 | static int l2cap_sock_release(struct socket *sock) |
1022 | { | |
1023 | struct sock *sk = sock->sk; | |
1024 | int err; | |
1025 | ||
1026 | BT_DBG("sock %p, sk %p", sock, sk); | |
1027 | ||
1028 | if (!sk) | |
1029 | return 0; | |
1030 | ||
5b28d95c MY |
1031 | bt_sock_unlink(&l2cap_sk_list, sk); |
1032 | ||
554f05bb GP |
1033 | err = l2cap_sock_shutdown(sock, 2); |
1034 | ||
1035 | sock_orphan(sk); | |
1036 | l2cap_sock_kill(sk); | |
1037 | return err; | |
1038 | } | |
1039 | ||
c0df7f6e AE |
1040 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
1041 | { | |
1042 | struct sock *sk; | |
1043 | ||
1044 | BT_DBG("parent %p", parent); | |
1045 | ||
1046 | /* Close not yet accepted channels */ | |
1047 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
1048 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
1049 | ||
1050 | l2cap_chan_lock(chan); | |
1051 | __clear_chan_timer(chan); | |
1052 | l2cap_chan_close(chan, ECONNRESET); | |
1053 | l2cap_chan_unlock(chan); | |
1054 | ||
1055 | l2cap_sock_kill(sk); | |
1056 | } | |
1057 | } | |
1058 | ||
80b98027 | 1059 | static struct l2cap_chan *l2cap_sock_new_connection_cb(struct l2cap_chan *chan) |
80808e43 | 1060 | { |
80b98027 | 1061 | struct sock *sk, *parent = chan->data; |
80808e43 | 1062 | |
8ffb9290 GP |
1063 | lock_sock(parent); |
1064 | ||
53826692 GP |
1065 | /* Check for backlog size */ |
1066 | if (sk_acceptq_is_full(parent)) { | |
1067 | BT_DBG("backlog full %d", parent->sk_ack_backlog); | |
1068 | return NULL; | |
1069 | } | |
1070 | ||
80808e43 | 1071 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, |
2d792818 | 1072 | GFP_ATOMIC); |
80808e43 GP |
1073 | if (!sk) |
1074 | return NULL; | |
1075 | ||
d22015aa OP |
1076 | bt_sock_reclassify_lock(sk, BTPROTO_L2CAP); |
1077 | ||
80808e43 GP |
1078 | l2cap_sock_init(sk, parent); |
1079 | ||
644912e1 GP |
1080 | bt_accept_enqueue(parent, sk); |
1081 | ||
8ffb9290 GP |
1082 | release_sock(parent); |
1083 | ||
80808e43 GP |
1084 | return l2cap_pi(sk)->chan; |
1085 | } | |
1086 | ||
80b98027 | 1087 | static int l2cap_sock_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) |
23070494 | 1088 | { |
80b98027 | 1089 | struct sock *sk = chan->data; |
84b34d98 | 1090 | int err; |
e328140f | 1091 | |
6be36555 AE |
1092 | lock_sock(sk); |
1093 | ||
84b34d98 | 1094 | if (l2cap_pi(sk)->rx_busy_skb) { |
6be36555 AE |
1095 | err = -ENOMEM; |
1096 | goto done; | |
1097 | } | |
e328140f MM |
1098 | |
1099 | err = sock_queue_rcv_skb(sk, skb); | |
1100 | ||
1101 | /* For ERTM, handle one skb that doesn't fit into the recv | |
1102 | * buffer. This is important to do because the data frames | |
1103 | * have already been acked, so the skb cannot be discarded. | |
1104 | * | |
1105 | * Notify the l2cap core that the buffer is full, so the | |
1106 | * LOCAL_BUSY state is entered and no more frames are | |
1107 | * acked and reassembled until there is buffer space | |
1108 | * available. | |
1109 | */ | |
84b34d98 MH |
1110 | if (err < 0 && chan->mode == L2CAP_MODE_ERTM) { |
1111 | l2cap_pi(sk)->rx_busy_skb = skb; | |
1112 | l2cap_chan_busy(chan, 1); | |
e328140f MM |
1113 | err = 0; |
1114 | } | |
23070494 | 1115 | |
6be36555 AE |
1116 | done: |
1117 | release_sock(sk); | |
1118 | ||
e328140f | 1119 | return err; |
23070494 GP |
1120 | } |
1121 | ||
80b98027 | 1122 | static void l2cap_sock_close_cb(struct l2cap_chan *chan) |
ba3bd0ee | 1123 | { |
80b98027 | 1124 | struct sock *sk = chan->data; |
ba3bd0ee GP |
1125 | |
1126 | l2cap_sock_kill(sk); | |
1127 | } | |
1128 | ||
c0df7f6e AE |
1129 | static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err) |
1130 | { | |
1131 | struct sock *sk = chan->data; | |
1132 | struct sock *parent; | |
1133 | ||
1134 | lock_sock(sk); | |
1135 | ||
1136 | parent = bt_sk(sk)->parent; | |
1137 | ||
1138 | sock_set_flag(sk, SOCK_ZAPPED); | |
1139 | ||
1140 | switch (chan->state) { | |
1141 | case BT_OPEN: | |
1142 | case BT_BOUND: | |
1143 | case BT_CLOSED: | |
1144 | break; | |
1145 | case BT_LISTEN: | |
1146 | l2cap_sock_cleanup_listen(sk); | |
1147 | sk->sk_state = BT_CLOSED; | |
1148 | chan->state = BT_CLOSED; | |
1149 | ||
1150 | break; | |
1151 | default: | |
1152 | sk->sk_state = BT_CLOSED; | |
1153 | chan->state = BT_CLOSED; | |
1154 | ||
1155 | sk->sk_err = err; | |
1156 | ||
1157 | if (parent) { | |
1158 | bt_accept_unlink(sk); | |
1159 | parent->sk_data_ready(parent, 0); | |
1160 | } else { | |
1161 | sk->sk_state_change(sk); | |
1162 | } | |
1163 | ||
1164 | break; | |
1165 | } | |
1166 | ||
1167 | release_sock(sk); | |
1168 | } | |
1169 | ||
53f52121 GP |
1170 | static void l2cap_sock_state_change_cb(struct l2cap_chan *chan, int state, |
1171 | int err) | |
89bc500e | 1172 | { |
80b98027 | 1173 | struct sock *sk = chan->data; |
89bc500e GP |
1174 | |
1175 | sk->sk_state = state; | |
53f52121 GP |
1176 | |
1177 | if (err) | |
1178 | sk->sk_err = err; | |
89bc500e GP |
1179 | } |
1180 | ||
2f7719ce | 1181 | static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan, |
90338947 | 1182 | unsigned long len, int nb) |
2f7719ce | 1183 | { |
0f2c6153 | 1184 | struct sock *sk = chan->data; |
90338947 GP |
1185 | struct sk_buff *skb; |
1186 | int err; | |
1187 | ||
a6a5568c | 1188 | l2cap_chan_unlock(chan); |
0f2c6153 | 1189 | skb = bt_skb_send_alloc(sk, len, nb, &err); |
a6a5568c MM |
1190 | l2cap_chan_lock(chan); |
1191 | ||
90338947 GP |
1192 | if (!skb) |
1193 | return ERR_PTR(err); | |
2f7719ce | 1194 | |
0e790c64 GP |
1195 | bt_cb(skb)->chan = chan; |
1196 | ||
90338947 | 1197 | return skb; |
2f7719ce AE |
1198 | } |
1199 | ||
54a59aa2 AE |
1200 | static void l2cap_sock_ready_cb(struct l2cap_chan *chan) |
1201 | { | |
1202 | struct sock *sk = chan->data; | |
1203 | struct sock *parent; | |
1204 | ||
1205 | lock_sock(sk); | |
1206 | ||
1207 | parent = bt_sk(sk)->parent; | |
1208 | ||
1209 | BT_DBG("sk %p, parent %p", sk, parent); | |
1210 | ||
1211 | sk->sk_state = BT_CONNECTED; | |
1212 | sk->sk_state_change(sk); | |
1213 | ||
1214 | if (parent) | |
1215 | parent->sk_data_ready(parent, 0); | |
1216 | ||
1217 | release_sock(sk); | |
1218 | } | |
1219 | ||
2dc4e510 GP |
1220 | static void l2cap_sock_defer_cb(struct l2cap_chan *chan) |
1221 | { | |
acdcabf5 GP |
1222 | struct sock *parent, *sk = chan->data; |
1223 | ||
1224 | lock_sock(sk); | |
2dc4e510 | 1225 | |
acdcabf5 | 1226 | parent = bt_sk(sk)->parent; |
2dc4e510 GP |
1227 | if (parent) |
1228 | parent->sk_data_ready(parent, 0); | |
acdcabf5 GP |
1229 | |
1230 | release_sock(sk); | |
2dc4e510 GP |
1231 | } |
1232 | ||
d97c899b MH |
1233 | static void l2cap_sock_resume_cb(struct l2cap_chan *chan) |
1234 | { | |
1235 | struct sock *sk = chan->data; | |
1236 | ||
1237 | clear_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); | |
1238 | sk->sk_state_change(sk); | |
1239 | } | |
1240 | ||
5ec1bbe5 GP |
1241 | static void l2cap_sock_set_shutdown_cb(struct l2cap_chan *chan) |
1242 | { | |
1243 | struct sock *sk = chan->data; | |
1244 | ||
1245 | lock_sock(sk); | |
1246 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1247 | release_sock(sk); | |
1248 | } | |
1249 | ||
8d836d71 GP |
1250 | static long l2cap_sock_get_sndtimeo_cb(struct l2cap_chan *chan) |
1251 | { | |
1252 | struct sock *sk = chan->data; | |
1253 | ||
1254 | return sk->sk_sndtimeo; | |
1255 | } | |
1256 | ||
80808e43 GP |
1257 | static struct l2cap_ops l2cap_chan_ops = { |
1258 | .name = "L2CAP Socket Interface", | |
1259 | .new_connection = l2cap_sock_new_connection_cb, | |
23070494 | 1260 | .recv = l2cap_sock_recv_cb, |
ba3bd0ee | 1261 | .close = l2cap_sock_close_cb, |
c0df7f6e | 1262 | .teardown = l2cap_sock_teardown_cb, |
89bc500e | 1263 | .state_change = l2cap_sock_state_change_cb, |
54a59aa2 | 1264 | .ready = l2cap_sock_ready_cb, |
2dc4e510 | 1265 | .defer = l2cap_sock_defer_cb, |
d97c899b | 1266 | .resume = l2cap_sock_resume_cb, |
5ec1bbe5 | 1267 | .set_shutdown = l2cap_sock_set_shutdown_cb, |
8d836d71 | 1268 | .get_sndtimeo = l2cap_sock_get_sndtimeo_cb, |
2f7719ce | 1269 | .alloc_skb = l2cap_sock_alloc_skb_cb, |
80808e43 GP |
1270 | }; |
1271 | ||
bb58f747 GP |
1272 | static void l2cap_sock_destruct(struct sock *sk) |
1273 | { | |
1274 | BT_DBG("sk %p", sk); | |
1275 | ||
23d3a869 SL |
1276 | if (l2cap_pi(sk)->chan) |
1277 | l2cap_chan_put(l2cap_pi(sk)->chan); | |
84b34d98 | 1278 | |
e328140f MM |
1279 | if (l2cap_pi(sk)->rx_busy_skb) { |
1280 | kfree_skb(l2cap_pi(sk)->rx_busy_skb); | |
1281 | l2cap_pi(sk)->rx_busy_skb = NULL; | |
1282 | } | |
1283 | ||
bb58f747 GP |
1284 | skb_queue_purge(&sk->sk_receive_queue); |
1285 | skb_queue_purge(&sk->sk_write_queue); | |
1286 | } | |
1287 | ||
2edf870d MH |
1288 | static void l2cap_skb_msg_name(struct sk_buff *skb, void *msg_name, |
1289 | int *msg_namelen) | |
1290 | { | |
1291 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) msg_name; | |
1292 | ||
1293 | memset(la, 0, sizeof(struct sockaddr_l2)); | |
1294 | la->l2_family = AF_BLUETOOTH; | |
1295 | la->l2_psm = bt_cb(skb)->psm; | |
1296 | bacpy(&la->l2_bdaddr, &bt_cb(skb)->bdaddr); | |
1297 | ||
1298 | *msg_namelen = sizeof(struct sockaddr_l2); | |
1299 | } | |
1300 | ||
80808e43 | 1301 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747 | 1302 | { |
84b34d98 | 1303 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
bb58f747 GP |
1304 | |
1305 | BT_DBG("sk %p", sk); | |
1306 | ||
1307 | if (parent) { | |
b4450035 GP |
1308 | struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
1309 | ||
bb58f747 | 1310 | sk->sk_type = parent->sk_type; |
c5daa683 | 1311 | bt_sk(sk)->flags = bt_sk(parent)->flags; |
bb58f747 | 1312 | |
715ec005 | 1313 | chan->chan_type = pchan->chan_type; |
0c1bc5c6 GP |
1314 | chan->imtu = pchan->imtu; |
1315 | chan->omtu = pchan->omtu; | |
b4450035 | 1316 | chan->conf_state = pchan->conf_state; |
0c1bc5c6 | 1317 | chan->mode = pchan->mode; |
47d1ec61 GP |
1318 | chan->fcs = pchan->fcs; |
1319 | chan->max_tx = pchan->max_tx; | |
1320 | chan->tx_win = pchan->tx_win; | |
6b3c7104 | 1321 | chan->tx_win_max = pchan->tx_win_max; |
4343478f | 1322 | chan->sec_level = pchan->sec_level; |
d57b0e8b | 1323 | chan->flags = pchan->flags; |
6230c9b4 PM |
1324 | |
1325 | security_sk_clone(parent, sk); | |
bb58f747 | 1326 | } else { |
715ec005 GP |
1327 | switch (sk->sk_type) { |
1328 | case SOCK_RAW: | |
1329 | chan->chan_type = L2CAP_CHAN_RAW; | |
1330 | break; | |
1331 | case SOCK_DGRAM: | |
1332 | chan->chan_type = L2CAP_CHAN_CONN_LESS; | |
2edf870d | 1333 | bt_sk(sk)->skb_msg_name = l2cap_skb_msg_name; |
715ec005 GP |
1334 | break; |
1335 | case SOCK_SEQPACKET: | |
1336 | case SOCK_STREAM: | |
1337 | chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; | |
1338 | break; | |
1339 | } | |
1340 | ||
0c1bc5c6 GP |
1341 | chan->imtu = L2CAP_DEFAULT_MTU; |
1342 | chan->omtu = 0; | |
bb58f747 | 1343 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c6 | 1344 | chan->mode = L2CAP_MODE_ERTM; |
c1360a1c | 1345 | set_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
bb58f747 | 1346 | } else { |
0c1bc5c6 | 1347 | chan->mode = L2CAP_MODE_BASIC; |
bb58f747 | 1348 | } |
bd4b1653 AE |
1349 | |
1350 | l2cap_chan_set_defaults(chan); | |
bb58f747 GP |
1351 | } |
1352 | ||
1353 | /* Default config options */ | |
0c1bc5c6 | 1354 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e43 GP |
1355 | |
1356 | chan->data = sk; | |
1357 | chan->ops = &l2cap_chan_ops; | |
bb58f747 GP |
1358 | } |
1359 | ||
1360 | static struct proto l2cap_proto = { | |
1361 | .name = "L2CAP", | |
1362 | .owner = THIS_MODULE, | |
1363 | .obj_size = sizeof(struct l2cap_pinfo) | |
1364 | }; | |
1365 | ||
2d792818 GP |
1366 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
1367 | int proto, gfp_t prio) | |
bb58f747 GP |
1368 | { |
1369 | struct sock *sk; | |
dc50a06d | 1370 | struct l2cap_chan *chan; |
bb58f747 GP |
1371 | |
1372 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); | |
1373 | if (!sk) | |
1374 | return NULL; | |
1375 | ||
1376 | sock_init_data(sock, sk); | |
1377 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
1378 | ||
1379 | sk->sk_destruct = l2cap_sock_destruct; | |
ba13ccd9 | 1380 | sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; |
bb58f747 GP |
1381 | |
1382 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1383 | ||
1384 | sk->sk_protocol = proto; | |
1385 | sk->sk_state = BT_OPEN; | |
1386 | ||
eef1d9b6 | 1387 | chan = l2cap_chan_create(); |
dc50a06d | 1388 | if (!chan) { |
49dfbb91 | 1389 | sk_free(sk); |
dc50a06d GP |
1390 | return NULL; |
1391 | } | |
1392 | ||
61d6ef3e MM |
1393 | l2cap_chan_hold(chan); |
1394 | ||
dc50a06d GP |
1395 | l2cap_pi(sk)->chan = chan; |
1396 | ||
bb58f747 GP |
1397 | return sk; |
1398 | } | |
1399 | ||
1400 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
1401 | int kern) | |
1402 | { | |
1403 | struct sock *sk; | |
1404 | ||
1405 | BT_DBG("sock %p", sock); | |
1406 | ||
1407 | sock->state = SS_UNCONNECTED; | |
1408 | ||
1409 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
2d792818 | 1410 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
bb58f747 GP |
1411 | return -ESOCKTNOSUPPORT; |
1412 | ||
1413 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
1414 | return -EPERM; | |
1415 | ||
1416 | sock->ops = &l2cap_sock_ops; | |
1417 | ||
1418 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); | |
1419 | if (!sk) | |
1420 | return -ENOMEM; | |
1421 | ||
1422 | l2cap_sock_init(sk, NULL); | |
5b28d95c | 1423 | bt_sock_link(&l2cap_sk_list, sk); |
bb58f747 GP |
1424 | return 0; |
1425 | } | |
1426 | ||
cf2f90f5 | 1427 | static const struct proto_ops l2cap_sock_ops = { |
65390587 GP |
1428 | .family = PF_BLUETOOTH, |
1429 | .owner = THIS_MODULE, | |
1430 | .release = l2cap_sock_release, | |
1431 | .bind = l2cap_sock_bind, | |
1432 | .connect = l2cap_sock_connect, | |
1433 | .listen = l2cap_sock_listen, | |
1434 | .accept = l2cap_sock_accept, | |
1435 | .getname = l2cap_sock_getname, | |
1436 | .sendmsg = l2cap_sock_sendmsg, | |
1437 | .recvmsg = l2cap_sock_recvmsg, | |
1438 | .poll = bt_sock_poll, | |
1439 | .ioctl = bt_sock_ioctl, | |
1440 | .mmap = sock_no_mmap, | |
1441 | .socketpair = sock_no_socketpair, | |
1442 | .shutdown = l2cap_sock_shutdown, | |
1443 | .setsockopt = l2cap_sock_setsockopt, | |
1444 | .getsockopt = l2cap_sock_getsockopt | |
1445 | }; | |
1446 | ||
bb58f747 GP |
1447 | static const struct net_proto_family l2cap_sock_family_ops = { |
1448 | .family = PF_BLUETOOTH, | |
1449 | .owner = THIS_MODULE, | |
1450 | .create = l2cap_sock_create, | |
1451 | }; | |
1452 | ||
1453 | int __init l2cap_init_sockets(void) | |
1454 | { | |
e2174ca4 | 1455 | int err; |
bb58f747 | 1456 | |
e2174ca4 GP |
1457 | err = proto_register(&l2cap_proto, 0); |
1458 | if (err < 0) | |
1459 | return err; | |
bb58f747 | 1460 | |
e2174ca4 | 1461 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
5b28d95c MY |
1462 | if (err < 0) { |
1463 | BT_ERR("L2CAP socket registration failed"); | |
e2174ca4 | 1464 | goto error; |
5b28d95c MY |
1465 | } |
1466 | ||
b0316615 | 1467 | err = bt_procfs_init(&init_net, "l2cap", &l2cap_sk_list, |
2d792818 | 1468 | NULL); |
5b28d95c MY |
1469 | if (err < 0) { |
1470 | BT_ERR("Failed to create L2CAP proc file"); | |
1471 | bt_sock_unregister(BTPROTO_L2CAP); | |
1472 | goto error; | |
1473 | } | |
bb58f747 | 1474 | |
e2174ca4 | 1475 | BT_INFO("L2CAP socket layer initialized"); |
bb58f747 | 1476 | |
e2174ca4 | 1477 | return 0; |
bb58f747 GP |
1478 | |
1479 | error: | |
e2174ca4 GP |
1480 | proto_unregister(&l2cap_proto); |
1481 | return err; | |
bb58f747 GP |
1482 | } |
1483 | ||
1484 | void l2cap_cleanup_sockets(void) | |
1485 | { | |
5b28d95c | 1486 | bt_procfs_cleanup(&init_net, "l2cap"); |
5e9d7f86 | 1487 | bt_sock_unregister(BTPROTO_L2CAP); |
e2174ca4 | 1488 | proto_unregister(&l2cap_proto); |
bb58f747 | 1489 | } |
9149761a JH |
1490 | |
1491 | module_param(enable_lecoc, bool, 0644); | |
1492 | MODULE_PARM_DESC(enable_lecoc, "Enable support for LE CoC"); |