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 | ||
bc3b2d7f | 30 | #include <linux/export.h> |
6230c9b4 | 31 | |
bb58f747 | 32 | #include <net/bluetooth/bluetooth.h> |
33575df7 | 33 | #include <net/bluetooth/hci_core.h> |
bb58f747 | 34 | #include <net/bluetooth/l2cap.h> |
ac4b7236 MH |
35 | |
36 | #include "smp.h" | |
bb58f747 | 37 | |
5b28d95c MY |
38 | static struct bt_sock_list l2cap_sk_list = { |
39 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) | |
40 | }; | |
41 | ||
cf2f90f5 | 42 | static const struct proto_ops l2cap_sock_ops; |
80808e43 | 43 | static void l2cap_sock_init(struct sock *sk, struct sock *parent); |
2d792818 GP |
44 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
45 | int proto, gfp_t prio); | |
cf2f90f5 | 46 | |
b3916db3 DH |
47 | bool l2cap_is_socket(struct socket *sock) |
48 | { | |
49 | return sock && sock->ops == &l2cap_sock_ops; | |
50 | } | |
51 | EXPORT_SYMBOL(l2cap_is_socket); | |
52 | ||
af6bcd82 GP |
53 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
54 | { | |
55 | struct sock *sk = sock->sk; | |
4343478f | 56 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
57 | struct sockaddr_l2 la; |
58 | int len, err = 0; | |
59 | ||
60 | BT_DBG("sk %p", sk); | |
61 | ||
62 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
63 | return -EINVAL; | |
64 | ||
65 | memset(&la, 0, sizeof(la)); | |
66 | len = min_t(unsigned int, sizeof(la), alen); | |
67 | memcpy(&la, addr, len); | |
68 | ||
b62f328b | 69 | if (la.l2_cid && la.l2_psm) |
af6bcd82 GP |
70 | return -EINVAL; |
71 | ||
80c1a2e7 JH |
72 | if (!bdaddr_type_is_valid(la.l2_bdaddr_type)) |
73 | return -EINVAL; | |
74 | ||
bfe4655f JH |
75 | if (bdaddr_type_is_le(la.l2_bdaddr_type)) { |
76 | /* Connection oriented channels are not supported on LE */ | |
77 | if (la.l2_psm) | |
78 | return -EINVAL; | |
79 | /* We only allow ATT user space socket */ | |
7f59ddad | 80 | if (la.l2_cid != __constant_cpu_to_le16(L2CAP_CID_ATT)) |
bfe4655f JH |
81 | return -EINVAL; |
82 | } | |
83 | ||
af6bcd82 GP |
84 | lock_sock(sk); |
85 | ||
86 | if (sk->sk_state != BT_OPEN) { | |
87 | err = -EBADFD; | |
88 | goto done; | |
89 | } | |
90 | ||
91 | if (la.l2_psm) { | |
92 | __u16 psm = __le16_to_cpu(la.l2_psm); | |
93 | ||
94 | /* PSM must be odd and lsb of upper byte must be 0 */ | |
95 | if ((psm & 0x0101) != 0x0001) { | |
96 | err = -EINVAL; | |
97 | goto done; | |
98 | } | |
99 | ||
100 | /* Restrict usage of well-known PSMs */ | |
101 | if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { | |
102 | err = -EACCES; | |
103 | goto done; | |
104 | } | |
105 | } | |
106 | ||
9e4425ff | 107 | if (la.l2_cid) |
6e4aff10 | 108 | err = l2cap_add_scid(chan, __le16_to_cpu(la.l2_cid)); |
9e4425ff GP |
109 | else |
110 | err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm); | |
af6bcd82 | 111 | |
9e4425ff GP |
112 | if (err < 0) |
113 | goto done; | |
af6bcd82 | 114 | |
6a974b50 | 115 | switch (chan->chan_type) { |
3124b843 MH |
116 | case L2CAP_CHAN_CONN_LESS: |
117 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_3DSP) | |
118 | chan->sec_level = BT_SECURITY_SDP; | |
119 | break; | |
6a974b50 MH |
120 | case L2CAP_CHAN_CONN_ORIENTED: |
121 | if (__le16_to_cpu(la.l2_psm) == L2CAP_PSM_SDP || | |
122 | __le16_to_cpu(la.l2_psm) == L2CAP_PSM_RFCOMM) | |
123 | chan->sec_level = BT_SECURITY_SDP; | |
124 | break; | |
125 | } | |
b62f328b | 126 | |
7eafc59e | 127 | bacpy(&chan->src, &la.l2_bdaddr); |
4f1654e0 | 128 | chan->src_type = la.l2_bdaddr_type; |
89bc500e GP |
129 | |
130 | chan->state = BT_BOUND; | |
9e4425ff | 131 | sk->sk_state = BT_BOUND; |
af6bcd82 GP |
132 | |
133 | done: | |
134 | release_sock(sk); | |
135 | return err; | |
136 | } | |
137 | ||
2d792818 GP |
138 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, |
139 | int alen, int flags) | |
4e34c50b GP |
140 | { |
141 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 142 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
4e34c50b GP |
143 | struct sockaddr_l2 la; |
144 | int len, err = 0; | |
145 | ||
146 | BT_DBG("sk %p", sk); | |
147 | ||
148 | if (!addr || alen < sizeof(addr->sa_family) || | |
149 | addr->sa_family != AF_BLUETOOTH) | |
150 | return -EINVAL; | |
151 | ||
152 | memset(&la, 0, sizeof(la)); | |
153 | len = min_t(unsigned int, sizeof(la), alen); | |
154 | memcpy(&la, addr, len); | |
155 | ||
acd7d370 | 156 | if (la.l2_cid && la.l2_psm) |
4e34c50b GP |
157 | return -EINVAL; |
158 | ||
80c1a2e7 JH |
159 | if (!bdaddr_type_is_valid(la.l2_bdaddr_type)) |
160 | return -EINVAL; | |
161 | ||
eb622495 JH |
162 | /* Check that the socket wasn't bound to something that |
163 | * conflicts with the address given to connect(). If chan->src | |
164 | * is BDADDR_ANY it means bind() was never used, in which case | |
165 | * chan->src_type and la.l2_bdaddr_type do not need to match. | |
166 | */ | |
167 | if (chan->src_type == BDADDR_BREDR && bacmp(&chan->src, BDADDR_ANY) && | |
168 | bdaddr_type_is_le(la.l2_bdaddr_type)) { | |
169 | /* Old user space versions will try to incorrectly bind | |
170 | * the ATT socket using BDADDR_BREDR. We need to accept | |
171 | * this and fix up the source address type only when | |
172 | * both the source CID and destination CID indicate | |
173 | * ATT. Anything else is an invalid combination. | |
174 | */ | |
175 | if (chan->scid != L2CAP_CID_ATT || | |
176 | la.l2_cid != __constant_cpu_to_le16(L2CAP_CID_ATT)) | |
177 | return -EINVAL; | |
178 | ||
179 | /* We don't have the hdev available here to make a | |
180 | * better decision on random vs public, but since all | |
181 | * user space versions that exhibit this issue anyway do | |
182 | * not support random local addresses assuming public | |
183 | * here is good enough. | |
184 | */ | |
185 | chan->src_type = BDADDR_LE_PUBLIC; | |
186 | } | |
1f209383 JH |
187 | |
188 | if (chan->src_type != BDADDR_BREDR && la.l2_bdaddr_type == BDADDR_BREDR) | |
189 | return -EINVAL; | |
190 | ||
bfe4655f JH |
191 | if (bdaddr_type_is_le(la.l2_bdaddr_type)) { |
192 | /* Connection oriented channels are not supported on LE */ | |
193 | if (la.l2_psm) | |
194 | return -EINVAL; | |
195 | /* We only allow ATT user space socket */ | |
7f59ddad | 196 | if (la.l2_cid != __constant_cpu_to_le16(L2CAP_CID_ATT)) |
bfe4655f JH |
197 | return -EINVAL; |
198 | } | |
199 | ||
6e4aff10 | 200 | err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid), |
8e9f9892 | 201 | &la.l2_bdaddr, la.l2_bdaddr_type); |
4e34c50b | 202 | if (err) |
b3fb611e | 203 | return err; |
4e34c50b | 204 | |
6be36555 AE |
205 | lock_sock(sk); |
206 | ||
4e34c50b | 207 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
2d792818 | 208 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
b3fb611e AE |
209 | |
210 | release_sock(sk); | |
211 | ||
4e34c50b GP |
212 | return err; |
213 | } | |
214 | ||
af6bcd82 GP |
215 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
216 | { | |
217 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 218 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
af6bcd82 GP |
219 | int err = 0; |
220 | ||
221 | BT_DBG("sk %p backlog %d", sk, backlog); | |
222 | ||
223 | lock_sock(sk); | |
224 | ||
6b3af733 | 225 | if (sk->sk_state != BT_BOUND) { |
af6bcd82 GP |
226 | err = -EBADFD; |
227 | goto done; | |
228 | } | |
229 | ||
6b3af733 MH |
230 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) { |
231 | err = -EINVAL; | |
232 | goto done; | |
233 | } | |
234 | ||
0c1bc5c6 | 235 | switch (chan->mode) { |
af6bcd82 GP |
236 | case L2CAP_MODE_BASIC: |
237 | break; | |
238 | case L2CAP_MODE_ERTM: | |
239 | case L2CAP_MODE_STREAMING: | |
240 | if (!disable_ertm) | |
241 | break; | |
242 | /* fall through */ | |
243 | default: | |
244 | err = -ENOTSUPP; | |
245 | goto done; | |
246 | } | |
247 | ||
af6bcd82 GP |
248 | sk->sk_max_ack_backlog = backlog; |
249 | sk->sk_ack_backlog = 0; | |
89bc500e GP |
250 | |
251 | chan->state = BT_LISTEN; | |
af6bcd82 GP |
252 | sk->sk_state = BT_LISTEN; |
253 | ||
254 | done: | |
255 | release_sock(sk); | |
256 | return err; | |
257 | } | |
258 | ||
2d792818 GP |
259 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, |
260 | int flags) | |
c47b7c72 GP |
261 | { |
262 | DECLARE_WAITQUEUE(wait, current); | |
263 | struct sock *sk = sock->sk, *nsk; | |
264 | long timeo; | |
265 | int err = 0; | |
266 | ||
267 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
268 | ||
c47b7c72 GP |
269 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
270 | ||
271 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
272 | ||
273 | /* Wait for an incoming connection. (wake-one). */ | |
274 | add_wait_queue_exclusive(sk_sleep(sk), &wait); | |
f9a3c20a | 275 | while (1) { |
c47b7c72 | 276 | set_current_state(TASK_INTERRUPTIBLE); |
f9a3c20a PH |
277 | |
278 | if (sk->sk_state != BT_LISTEN) { | |
279 | err = -EBADFD; | |
c47b7c72 GP |
280 | break; |
281 | } | |
282 | ||
f9a3c20a PH |
283 | nsk = bt_accept_dequeue(sk, newsock); |
284 | if (nsk) | |
285 | break; | |
c47b7c72 | 286 | |
f9a3c20a PH |
287 | if (!timeo) { |
288 | err = -EAGAIN; | |
c47b7c72 GP |
289 | break; |
290 | } | |
291 | ||
292 | if (signal_pending(current)) { | |
293 | err = sock_intr_errno(timeo); | |
294 | break; | |
295 | } | |
f9a3c20a PH |
296 | |
297 | release_sock(sk); | |
298 | timeo = schedule_timeout(timeo); | |
299 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); | |
c47b7c72 | 300 | } |
f9a3c20a | 301 | __set_current_state(TASK_RUNNING); |
c47b7c72 GP |
302 | remove_wait_queue(sk_sleep(sk), &wait); |
303 | ||
304 | if (err) | |
305 | goto done; | |
306 | ||
307 | newsock->state = SS_CONNECTED; | |
308 | ||
309 | BT_DBG("new socket %p", nsk); | |
310 | ||
311 | done: | |
312 | release_sock(sk); | |
313 | return err; | |
314 | } | |
315 | ||
2d792818 GP |
316 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, |
317 | int *len, int peer) | |
d7175d55 GP |
318 | { |
319 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; | |
320 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 321 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
d7175d55 GP |
322 | |
323 | BT_DBG("sock %p, sk %p", sock, sk); | |
324 | ||
792039c7 | 325 | memset(la, 0, sizeof(struct sockaddr_l2)); |
d7175d55 GP |
326 | addr->sa_family = AF_BLUETOOTH; |
327 | *len = sizeof(struct sockaddr_l2); | |
328 | ||
329 | if (peer) { | |
fe4128e0 | 330 | la->l2_psm = chan->psm; |
7eafc59e | 331 | bacpy(&la->l2_bdaddr, &chan->dst); |
fe4128e0 | 332 | la->l2_cid = cpu_to_le16(chan->dcid); |
4f1654e0 | 333 | la->l2_bdaddr_type = chan->dst_type; |
d7175d55 | 334 | } else { |
0c1bc5c6 | 335 | la->l2_psm = chan->sport; |
7eafc59e | 336 | bacpy(&la->l2_bdaddr, &chan->src); |
fe4128e0 | 337 | la->l2_cid = cpu_to_le16(chan->scid); |
4f1654e0 | 338 | la->l2_bdaddr_type = chan->src_type; |
d7175d55 GP |
339 | } |
340 | ||
341 | return 0; | |
342 | } | |
343 | ||
2d792818 GP |
344 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, |
345 | char __user *optval, int __user *optlen) | |
99f4808d GP |
346 | { |
347 | struct sock *sk = sock->sk; | |
4343478f | 348 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d GP |
349 | struct l2cap_options opts; |
350 | struct l2cap_conninfo cinfo; | |
351 | int len, err = 0; | |
352 | u32 opt; | |
353 | ||
354 | BT_DBG("sk %p", sk); | |
355 | ||
356 | if (get_user(len, optlen)) | |
357 | return -EFAULT; | |
358 | ||
359 | lock_sock(sk); | |
360 | ||
361 | switch (optname) { | |
362 | case L2CAP_OPTIONS: | |
e3fb592b | 363 | memset(&opts, 0, sizeof(opts)); |
0c1bc5c6 GP |
364 | opts.imtu = chan->imtu; |
365 | opts.omtu = chan->omtu; | |
366 | opts.flush_to = chan->flush_to; | |
367 | opts.mode = chan->mode; | |
47d1ec61 GP |
368 | opts.fcs = chan->fcs; |
369 | opts.max_tx = chan->max_tx; | |
6327eb98 | 370 | opts.txwin_size = chan->tx_win; |
99f4808d GP |
371 | |
372 | len = min_t(unsigned int, len, sizeof(opts)); | |
373 | if (copy_to_user(optval, (char *) &opts, len)) | |
374 | err = -EFAULT; | |
375 | ||
376 | break; | |
377 | ||
378 | case L2CAP_LM: | |
4343478f | 379 | switch (chan->sec_level) { |
99f4808d GP |
380 | case BT_SECURITY_LOW: |
381 | opt = L2CAP_LM_AUTH; | |
382 | break; | |
383 | case BT_SECURITY_MEDIUM: | |
384 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; | |
385 | break; | |
386 | case BT_SECURITY_HIGH: | |
387 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | | |
2d792818 | 388 | L2CAP_LM_SECURE; |
99f4808d GP |
389 | break; |
390 | default: | |
391 | opt = 0; | |
392 | break; | |
393 | } | |
394 | ||
43bd0f32 | 395 | if (test_bit(FLAG_ROLE_SWITCH, &chan->flags)) |
99f4808d GP |
396 | opt |= L2CAP_LM_MASTER; |
397 | ||
ecf61bdb | 398 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
99f4808d GP |
399 | opt |= L2CAP_LM_RELIABLE; |
400 | ||
401 | if (put_user(opt, (u32 __user *) optval)) | |
402 | err = -EFAULT; | |
403 | break; | |
404 | ||
405 | case L2CAP_CONNINFO: | |
406 | if (sk->sk_state != BT_CONNECTED && | |
c5daa683 GP |
407 | !(sk->sk_state == BT_CONNECT2 && |
408 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { | |
99f4808d GP |
409 | err = -ENOTCONN; |
410 | break; | |
411 | } | |
412 | ||
8d03e971 | 413 | memset(&cinfo, 0, sizeof(cinfo)); |
8c1d787b GP |
414 | cinfo.hci_handle = chan->conn->hcon->handle; |
415 | memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); | |
99f4808d GP |
416 | |
417 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
418 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
419 | err = -EFAULT; | |
420 | ||
421 | break; | |
422 | ||
423 | default: | |
424 | err = -ENOPROTOOPT; | |
425 | break; | |
426 | } | |
427 | ||
428 | release_sock(sk); | |
429 | return err; | |
430 | } | |
431 | ||
2d792818 GP |
432 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, |
433 | char __user *optval, int __user *optlen) | |
99f4808d GP |
434 | { |
435 | struct sock *sk = sock->sk; | |
4343478f | 436 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
99f4808d | 437 | struct bt_security sec; |
14b12d0b | 438 | struct bt_power pwr; |
99f4808d GP |
439 | int len, err = 0; |
440 | ||
441 | BT_DBG("sk %p", sk); | |
442 | ||
443 | if (level == SOL_L2CAP) | |
444 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); | |
445 | ||
446 | if (level != SOL_BLUETOOTH) | |
447 | return -ENOPROTOOPT; | |
448 | ||
449 | if (get_user(len, optlen)) | |
450 | return -EFAULT; | |
451 | ||
452 | lock_sock(sk); | |
453 | ||
454 | switch (optname) { | |
455 | case BT_SECURITY: | |
715ec005 | 456 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
2d792818 | 457 | chan->chan_type != L2CAP_CHAN_RAW) { |
99f4808d GP |
458 | err = -EINVAL; |
459 | break; | |
460 | } | |
461 | ||
8f360119 | 462 | memset(&sec, 0, sizeof(sec)); |
85e34368 | 463 | if (chan->conn) { |
c6585a4d | 464 | sec.level = chan->conn->hcon->sec_level; |
99f4808d | 465 | |
85e34368 AE |
466 | if (sk->sk_state == BT_CONNECTED) |
467 | sec.key_size = chan->conn->hcon->enc_key_size; | |
468 | } else { | |
469 | sec.level = chan->sec_level; | |
470 | } | |
8f360119 | 471 | |
99f4808d GP |
472 | len = min_t(unsigned int, len, sizeof(sec)); |
473 | if (copy_to_user(optval, (char *) &sec, len)) | |
474 | err = -EFAULT; | |
475 | ||
476 | break; | |
477 | ||
478 | case BT_DEFER_SETUP: | |
479 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
480 | err = -EINVAL; | |
481 | break; | |
482 | } | |
483 | ||
c5daa683 GP |
484 | if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), |
485 | (u32 __user *) optval)) | |
99f4808d GP |
486 | err = -EFAULT; |
487 | ||
488 | break; | |
489 | ||
490 | case BT_FLUSHABLE: | |
d57b0e8b | 491 | if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags), |
2d792818 | 492 | (u32 __user *) optval)) |
99f4808d GP |
493 | err = -EFAULT; |
494 | ||
495 | break; | |
496 | ||
14b12d0b JG |
497 | case BT_POWER: |
498 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM | |
2d792818 | 499 | && sk->sk_type != SOCK_RAW) { |
14b12d0b JG |
500 | err = -EINVAL; |
501 | break; | |
502 | } | |
503 | ||
15770b1a | 504 | pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
14b12d0b JG |
505 | |
506 | len = min_t(unsigned int, len, sizeof(pwr)); | |
507 | if (copy_to_user(optval, (char *) &pwr, len)) | |
508 | err = -EFAULT; | |
509 | ||
510 | break; | |
511 | ||
2ea66482 | 512 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
513 | if (put_user(chan->chan_policy, (u32 __user *) optval)) |
514 | err = -EFAULT; | |
515 | break; | |
516 | ||
99f4808d GP |
517 | default: |
518 | err = -ENOPROTOOPT; | |
519 | break; | |
520 | } | |
521 | ||
522 | release_sock(sk); | |
523 | return err; | |
524 | } | |
525 | ||
682877c3 AG |
526 | static bool l2cap_valid_mtu(struct l2cap_chan *chan, u16 mtu) |
527 | { | |
528 | switch (chan->scid) { | |
073d1cf3 | 529 | case L2CAP_CID_ATT: |
8c3a4f00 | 530 | if (mtu < L2CAP_LE_MIN_MTU) |
682877c3 AG |
531 | return false; |
532 | break; | |
533 | ||
534 | default: | |
535 | if (mtu < L2CAP_DEFAULT_MIN_MTU) | |
536 | return false; | |
537 | } | |
538 | ||
539 | return true; | |
540 | } | |
541 | ||
2d792818 GP |
542 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, |
543 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
544 | { |
545 | struct sock *sk = sock->sk; | |
b4450035 | 546 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 GP |
547 | struct l2cap_options opts; |
548 | int len, err = 0; | |
549 | u32 opt; | |
550 | ||
551 | BT_DBG("sk %p", sk); | |
552 | ||
553 | lock_sock(sk); | |
554 | ||
555 | switch (optname) { | |
556 | case L2CAP_OPTIONS: | |
557 | if (sk->sk_state == BT_CONNECTED) { | |
558 | err = -EINVAL; | |
559 | break; | |
560 | } | |
561 | ||
0c1bc5c6 GP |
562 | opts.imtu = chan->imtu; |
563 | opts.omtu = chan->omtu; | |
564 | opts.flush_to = chan->flush_to; | |
565 | opts.mode = chan->mode; | |
47d1ec61 GP |
566 | opts.fcs = chan->fcs; |
567 | opts.max_tx = chan->max_tx; | |
6327eb98 | 568 | opts.txwin_size = chan->tx_win; |
33575df7 GP |
569 | |
570 | len = min_t(unsigned int, sizeof(opts), optlen); | |
571 | if (copy_from_user((char *) &opts, optval, len)) { | |
572 | err = -EFAULT; | |
573 | break; | |
574 | } | |
575 | ||
6327eb98 | 576 | if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) { |
33575df7 GP |
577 | err = -EINVAL; |
578 | break; | |
579 | } | |
580 | ||
682877c3 AG |
581 | if (!l2cap_valid_mtu(chan, opts.imtu)) { |
582 | err = -EINVAL; | |
583 | break; | |
584 | } | |
585 | ||
0c1bc5c6 GP |
586 | chan->mode = opts.mode; |
587 | switch (chan->mode) { | |
33575df7 | 588 | case L2CAP_MODE_BASIC: |
c1360a1c | 589 | clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
33575df7 GP |
590 | break; |
591 | case L2CAP_MODE_ERTM: | |
592 | case L2CAP_MODE_STREAMING: | |
593 | if (!disable_ertm) | |
594 | break; | |
595 | /* fall through */ | |
596 | default: | |
597 | err = -EINVAL; | |
598 | break; | |
599 | } | |
600 | ||
0c1bc5c6 GP |
601 | chan->imtu = opts.imtu; |
602 | chan->omtu = opts.omtu; | |
47d1ec61 GP |
603 | chan->fcs = opts.fcs; |
604 | chan->max_tx = opts.max_tx; | |
6327eb98 | 605 | chan->tx_win = opts.txwin_size; |
12d59781 | 606 | chan->flush_to = opts.flush_to; |
33575df7 GP |
607 | break; |
608 | ||
609 | case L2CAP_LM: | |
610 | if (get_user(opt, (u32 __user *) optval)) { | |
611 | err = -EFAULT; | |
612 | break; | |
613 | } | |
614 | ||
615 | if (opt & L2CAP_LM_AUTH) | |
4343478f | 616 | chan->sec_level = BT_SECURITY_LOW; |
33575df7 | 617 | if (opt & L2CAP_LM_ENCRYPT) |
4343478f | 618 | chan->sec_level = BT_SECURITY_MEDIUM; |
33575df7 | 619 | if (opt & L2CAP_LM_SECURE) |
4343478f | 620 | chan->sec_level = BT_SECURITY_HIGH; |
33575df7 | 621 | |
43bd0f32 AE |
622 | if (opt & L2CAP_LM_MASTER) |
623 | set_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
624 | else | |
625 | clear_bit(FLAG_ROLE_SWITCH, &chan->flags); | |
ecf61bdb AE |
626 | |
627 | if (opt & L2CAP_LM_RELIABLE) | |
628 | set_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
629 | else | |
630 | clear_bit(FLAG_FORCE_RELIABLE, &chan->flags); | |
33575df7 GP |
631 | break; |
632 | ||
633 | default: | |
634 | err = -ENOPROTOOPT; | |
635 | break; | |
636 | } | |
637 | ||
638 | release_sock(sk); | |
639 | return err; | |
640 | } | |
641 | ||
2d792818 GP |
642 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, |
643 | char __user *optval, unsigned int optlen) | |
33575df7 GP |
644 | { |
645 | struct sock *sk = sock->sk; | |
4343478f | 646 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
33575df7 | 647 | struct bt_security sec; |
14b12d0b | 648 | struct bt_power pwr; |
f1cb9af5 | 649 | struct l2cap_conn *conn; |
33575df7 GP |
650 | int len, err = 0; |
651 | u32 opt; | |
652 | ||
653 | BT_DBG("sk %p", sk); | |
654 | ||
655 | if (level == SOL_L2CAP) | |
656 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); | |
657 | ||
658 | if (level != SOL_BLUETOOTH) | |
659 | return -ENOPROTOOPT; | |
660 | ||
661 | lock_sock(sk); | |
662 | ||
663 | switch (optname) { | |
664 | case BT_SECURITY: | |
715ec005 | 665 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && |
2d792818 | 666 | chan->chan_type != L2CAP_CHAN_RAW) { |
33575df7 GP |
667 | err = -EINVAL; |
668 | break; | |
669 | } | |
670 | ||
671 | sec.level = BT_SECURITY_LOW; | |
672 | ||
673 | len = min_t(unsigned int, sizeof(sec), optlen); | |
674 | if (copy_from_user((char *) &sec, optval, len)) { | |
675 | err = -EFAULT; | |
676 | break; | |
677 | } | |
678 | ||
679 | if (sec.level < BT_SECURITY_LOW || | |
2d792818 | 680 | sec.level > BT_SECURITY_HIGH) { |
33575df7 GP |
681 | err = -EINVAL; |
682 | break; | |
683 | } | |
684 | ||
4343478f | 685 | chan->sec_level = sec.level; |
f1cb9af5 | 686 | |
0bee1d60 GP |
687 | if (!chan->conn) |
688 | break; | |
689 | ||
f1cb9af5 | 690 | conn = chan->conn; |
0bee1d60 GP |
691 | |
692 | /*change security for LE channels */ | |
073d1cf3 | 693 | if (chan->scid == L2CAP_CID_ATT) { |
f1cb9af5 VCG |
694 | if (!conn->hcon->out) { |
695 | err = -EINVAL; | |
696 | break; | |
697 | } | |
698 | ||
cc110922 | 699 | if (smp_conn_security(conn->hcon, sec.level)) |
f1cb9af5 | 700 | break; |
f1cb9af5 | 701 | sk->sk_state = BT_CONFIG; |
3542b854 | 702 | chan->state = BT_CONFIG; |
0bee1d60 | 703 | |
a7d7723a GP |
704 | /* or for ACL link */ |
705 | } else if ((sk->sk_state == BT_CONNECT2 && | |
2d792818 | 706 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) || |
a7d7723a GP |
707 | sk->sk_state == BT_CONNECTED) { |
708 | if (!l2cap_chan_check_security(chan)) | |
c5daa683 | 709 | set_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
a7d7723a GP |
710 | else |
711 | sk->sk_state_change(sk); | |
0bee1d60 GP |
712 | } else { |
713 | err = -EINVAL; | |
f1cb9af5 | 714 | } |
33575df7 GP |
715 | break; |
716 | ||
717 | case BT_DEFER_SETUP: | |
718 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
719 | err = -EINVAL; | |
720 | break; | |
721 | } | |
722 | ||
723 | if (get_user(opt, (u32 __user *) optval)) { | |
724 | err = -EFAULT; | |
725 | break; | |
726 | } | |
727 | ||
bdc25783 | 728 | if (opt) { |
c5daa683 | 729 | set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); |
bdc25783 MH |
730 | set_bit(FLAG_DEFER_SETUP, &chan->flags); |
731 | } else { | |
c5daa683 | 732 | clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); |
bdc25783 MH |
733 | clear_bit(FLAG_DEFER_SETUP, &chan->flags); |
734 | } | |
33575df7 GP |
735 | break; |
736 | ||
737 | case BT_FLUSHABLE: | |
738 | if (get_user(opt, (u32 __user *) optval)) { | |
739 | err = -EFAULT; | |
740 | break; | |
741 | } | |
742 | ||
743 | if (opt > BT_FLUSHABLE_ON) { | |
744 | err = -EINVAL; | |
745 | break; | |
746 | } | |
747 | ||
748 | if (opt == BT_FLUSHABLE_OFF) { | |
c1f23a2b | 749 | conn = chan->conn; |
25985edc | 750 | /* proceed further only when we have l2cap_conn and |
33575df7 GP |
751 | No Flush support in the LM */ |
752 | if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { | |
753 | err = -EINVAL; | |
754 | break; | |
755 | } | |
756 | } | |
757 | ||
d57b0e8b AE |
758 | if (opt) |
759 | set_bit(FLAG_FLUSHABLE, &chan->flags); | |
760 | else | |
761 | clear_bit(FLAG_FLUSHABLE, &chan->flags); | |
33575df7 GP |
762 | break; |
763 | ||
14b12d0b JG |
764 | case BT_POWER: |
765 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && | |
2d792818 | 766 | chan->chan_type != L2CAP_CHAN_RAW) { |
14b12d0b JG |
767 | err = -EINVAL; |
768 | break; | |
769 | } | |
770 | ||
771 | pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; | |
772 | ||
773 | len = min_t(unsigned int, sizeof(pwr), optlen); | |
774 | if (copy_from_user((char *) &pwr, optval, len)) { | |
775 | err = -EFAULT; | |
776 | break; | |
777 | } | |
15770b1a AE |
778 | |
779 | if (pwr.force_active) | |
780 | set_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
781 | else | |
782 | clear_bit(FLAG_FORCE_ACTIVE, &chan->flags); | |
14b12d0b JG |
783 | break; |
784 | ||
2ea66482 | 785 | case BT_CHANNEL_POLICY: |
2ea66482 MM |
786 | if (get_user(opt, (u32 __user *) optval)) { |
787 | err = -EFAULT; | |
788 | break; | |
789 | } | |
790 | ||
791 | if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) { | |
792 | err = -EINVAL; | |
793 | break; | |
794 | } | |
795 | ||
796 | if (chan->mode != L2CAP_MODE_ERTM && | |
2d792818 | 797 | chan->mode != L2CAP_MODE_STREAMING) { |
2ea66482 MM |
798 | err = -EOPNOTSUPP; |
799 | break; | |
800 | } | |
801 | ||
802 | chan->chan_policy = (u8) opt; | |
3f7a56c4 MM |
803 | |
804 | if (sk->sk_state == BT_CONNECTED && | |
805 | chan->move_role == L2CAP_MOVE_ROLE_NONE) | |
806 | l2cap_move_start(chan); | |
807 | ||
14b12d0b JG |
808 | break; |
809 | ||
33575df7 GP |
810 | default: |
811 | err = -ENOPROTOOPT; | |
812 | break; | |
813 | } | |
814 | ||
815 | release_sock(sk); | |
816 | return err; | |
817 | } | |
fd83ccdb | 818 | |
2d792818 GP |
819 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
820 | struct msghdr *msg, size_t len) | |
fd83ccdb GP |
821 | { |
822 | struct sock *sk = sock->sk; | |
0c1bc5c6 | 823 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb GP |
824 | int err; |
825 | ||
826 | BT_DBG("sock %p, sk %p", sock, sk); | |
827 | ||
828 | err = sock_error(sk); | |
829 | if (err) | |
830 | return err; | |
831 | ||
832 | if (msg->msg_flags & MSG_OOB) | |
833 | return -EOPNOTSUPP; | |
834 | ||
a6a5568c | 835 | if (sk->sk_state != BT_CONNECTED) |
9a91a04a | 836 | return -ENOTCONN; |
fd83ccdb | 837 | |
e793dcf0 JH |
838 | lock_sock(sk); |
839 | err = bt_sock_wait_ready(sk, msg->msg_flags); | |
840 | release_sock(sk); | |
841 | if (err) | |
842 | return err; | |
843 | ||
a6a5568c | 844 | l2cap_chan_lock(chan); |
5e59b791 | 845 | err = l2cap_chan_send(chan, msg, len, sk->sk_priority); |
a6a5568c | 846 | l2cap_chan_unlock(chan); |
fd83ccdb | 847 | |
fd83ccdb GP |
848 | return err; |
849 | } | |
33575df7 | 850 | |
2d792818 GP |
851 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
852 | struct msghdr *msg, size_t len, int flags) | |
68983259 GP |
853 | { |
854 | struct sock *sk = sock->sk; | |
e328140f MM |
855 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
856 | int err; | |
68983259 GP |
857 | |
858 | lock_sock(sk); | |
859 | ||
c5daa683 GP |
860 | if (sk->sk_state == BT_CONNECT2 && test_bit(BT_SK_DEFER_SETUP, |
861 | &bt_sk(sk)->flags)) { | |
8c1d787b | 862 | sk->sk_state = BT_CONFIG; |
3542b854 | 863 | pi->chan->state = BT_CONFIG; |
8c1d787b | 864 | |
e328140f | 865 | __l2cap_connect_rsp_defer(pi->chan); |
970871bc JH |
866 | err = 0; |
867 | goto done; | |
68983259 GP |
868 | } |
869 | ||
870 | release_sock(sk); | |
871 | ||
872 | if (sock->type == SOCK_STREAM) | |
e328140f MM |
873 | err = bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); |
874 | else | |
875 | err = bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
876 | ||
877 | if (pi->chan->mode != L2CAP_MODE_ERTM) | |
878 | return err; | |
879 | ||
880 | /* Attempt to put pending rx data in the socket buffer */ | |
881 | ||
882 | lock_sock(sk); | |
883 | ||
884 | if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state)) | |
885 | goto done; | |
886 | ||
887 | if (pi->rx_busy_skb) { | |
888 | if (!sock_queue_rcv_skb(sk, pi->rx_busy_skb)) | |
889 | pi->rx_busy_skb = NULL; | |
890 | else | |
891 | goto done; | |
892 | } | |
893 | ||
894 | /* Restore data flow when half of the receive buffer is | |
895 | * available. This avoids resending large numbers of | |
896 | * frames. | |
897 | */ | |
898 | if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1) | |
899 | l2cap_chan_busy(pi->chan, 0); | |
68983259 | 900 | |
e328140f MM |
901 | done: |
902 | release_sock(sk); | |
903 | return err; | |
68983259 GP |
904 | } |
905 | ||
05fc1576 GP |
906 | /* Kill socket (only if zapped and orphan) |
907 | * Must be called on unlocked socket. | |
908 | */ | |
ba3bd0ee | 909 | static void l2cap_sock_kill(struct sock *sk) |
05fc1576 GP |
910 | { |
911 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
912 | return; | |
913 | ||
e05dcc32 | 914 | BT_DBG("sk %p state %s", sk, state_to_string(sk->sk_state)); |
05fc1576 GP |
915 | |
916 | /* Kill poor orphan */ | |
6ff5abbf | 917 | |
4af66c69 | 918 | l2cap_chan_put(l2cap_pi(sk)->chan); |
05fc1576 GP |
919 | sock_set_flag(sk, SOCK_DEAD); |
920 | sock_put(sk); | |
921 | } | |
922 | ||
dc25306b GP |
923 | static int __l2cap_wait_ack(struct sock *sk) |
924 | { | |
925 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
926 | DECLARE_WAITQUEUE(wait, current); | |
927 | int err = 0; | |
928 | int timeo = HZ/5; | |
929 | ||
930 | add_wait_queue(sk_sleep(sk), &wait); | |
931 | set_current_state(TASK_INTERRUPTIBLE); | |
932 | while (chan->unacked_frames > 0 && chan->conn) { | |
933 | if (!timeo) | |
934 | timeo = HZ/5; | |
935 | ||
936 | if (signal_pending(current)) { | |
937 | err = sock_intr_errno(timeo); | |
938 | break; | |
939 | } | |
940 | ||
941 | release_sock(sk); | |
942 | timeo = schedule_timeout(timeo); | |
943 | lock_sock(sk); | |
944 | set_current_state(TASK_INTERRUPTIBLE); | |
945 | ||
946 | err = sock_error(sk); | |
947 | if (err) | |
948 | break; | |
949 | } | |
950 | set_current_state(TASK_RUNNING); | |
951 | remove_wait_queue(sk_sleep(sk), &wait); | |
952 | return err; | |
953 | } | |
954 | ||
dcba0dba GP |
955 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
956 | { | |
957 | struct sock *sk = sock->sk; | |
7ddb6e0f | 958 | struct l2cap_chan *chan; |
3df91ea2 | 959 | struct l2cap_conn *conn; |
dcba0dba GP |
960 | int err = 0; |
961 | ||
962 | BT_DBG("sock %p, sk %p", sock, sk); | |
963 | ||
964 | if (!sk) | |
965 | return 0; | |
966 | ||
7ddb6e0f | 967 | chan = l2cap_pi(sk)->chan; |
3df91ea2 AE |
968 | conn = chan->conn; |
969 | ||
970 | if (conn) | |
971 | mutex_lock(&conn->chan_lock); | |
7ddb6e0f | 972 | |
6be36555 | 973 | l2cap_chan_lock(chan); |
dcba0dba | 974 | lock_sock(sk); |
6be36555 | 975 | |
dcba0dba | 976 | if (!sk->sk_shutdown) { |
0c1bc5c6 | 977 | if (chan->mode == L2CAP_MODE_ERTM) |
dcba0dba GP |
978 | err = __l2cap_wait_ack(sk); |
979 | ||
980 | sk->sk_shutdown = SHUTDOWN_MASK; | |
3df91ea2 | 981 | |
6be36555 | 982 | release_sock(sk); |
0f852724 | 983 | l2cap_chan_close(chan, 0); |
6be36555 | 984 | lock_sock(sk); |
dcba0dba GP |
985 | |
986 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
987 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
2d792818 | 988 | sk->sk_lingertime); |
dcba0dba GP |
989 | } |
990 | ||
991 | if (!err && sk->sk_err) | |
992 | err = -sk->sk_err; | |
993 | ||
994 | release_sock(sk); | |
6be36555 | 995 | l2cap_chan_unlock(chan); |
3df91ea2 AE |
996 | |
997 | if (conn) | |
998 | mutex_unlock(&conn->chan_lock); | |
999 | ||
dcba0dba GP |
1000 | return err; |
1001 | } | |
1002 | ||
554f05bb GP |
1003 | static int l2cap_sock_release(struct socket *sock) |
1004 | { | |
1005 | struct sock *sk = sock->sk; | |
1006 | int err; | |
1007 | ||
1008 | BT_DBG("sock %p, sk %p", sock, sk); | |
1009 | ||
1010 | if (!sk) | |
1011 | return 0; | |
1012 | ||
5b28d95c MY |
1013 | bt_sock_unlink(&l2cap_sk_list, sk); |
1014 | ||
554f05bb GP |
1015 | err = l2cap_sock_shutdown(sock, 2); |
1016 | ||
1017 | sock_orphan(sk); | |
1018 | l2cap_sock_kill(sk); | |
1019 | return err; | |
1020 | } | |
1021 | ||
c0df7f6e AE |
1022 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
1023 | { | |
1024 | struct sock *sk; | |
1025 | ||
1026 | BT_DBG("parent %p", parent); | |
1027 | ||
1028 | /* Close not yet accepted channels */ | |
1029 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
1030 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; | |
1031 | ||
1032 | l2cap_chan_lock(chan); | |
1033 | __clear_chan_timer(chan); | |
1034 | l2cap_chan_close(chan, ECONNRESET); | |
1035 | l2cap_chan_unlock(chan); | |
1036 | ||
1037 | l2cap_sock_kill(sk); | |
1038 | } | |
1039 | } | |
1040 | ||
80b98027 | 1041 | static struct l2cap_chan *l2cap_sock_new_connection_cb(struct l2cap_chan *chan) |
80808e43 | 1042 | { |
80b98027 | 1043 | struct sock *sk, *parent = chan->data; |
80808e43 | 1044 | |
53826692 GP |
1045 | /* Check for backlog size */ |
1046 | if (sk_acceptq_is_full(parent)) { | |
1047 | BT_DBG("backlog full %d", parent->sk_ack_backlog); | |
1048 | return NULL; | |
1049 | } | |
1050 | ||
80808e43 | 1051 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, |
2d792818 | 1052 | GFP_ATOMIC); |
80808e43 GP |
1053 | if (!sk) |
1054 | return NULL; | |
1055 | ||
d22015aa OP |
1056 | bt_sock_reclassify_lock(sk, BTPROTO_L2CAP); |
1057 | ||
80808e43 GP |
1058 | l2cap_sock_init(sk, parent); |
1059 | ||
644912e1 GP |
1060 | bt_accept_enqueue(parent, sk); |
1061 | ||
80808e43 GP |
1062 | return l2cap_pi(sk)->chan; |
1063 | } | |
1064 | ||
80b98027 | 1065 | static int l2cap_sock_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) |
23070494 | 1066 | { |
80b98027 | 1067 | struct sock *sk = chan->data; |
84b34d98 | 1068 | int err; |
e328140f | 1069 | |
6be36555 AE |
1070 | lock_sock(sk); |
1071 | ||
84b34d98 | 1072 | if (l2cap_pi(sk)->rx_busy_skb) { |
6be36555 AE |
1073 | err = -ENOMEM; |
1074 | goto done; | |
1075 | } | |
e328140f MM |
1076 | |
1077 | err = sock_queue_rcv_skb(sk, skb); | |
1078 | ||
1079 | /* For ERTM, handle one skb that doesn't fit into the recv | |
1080 | * buffer. This is important to do because the data frames | |
1081 | * have already been acked, so the skb cannot be discarded. | |
1082 | * | |
1083 | * Notify the l2cap core that the buffer is full, so the | |
1084 | * LOCAL_BUSY state is entered and no more frames are | |
1085 | * acked and reassembled until there is buffer space | |
1086 | * available. | |
1087 | */ | |
84b34d98 MH |
1088 | if (err < 0 && chan->mode == L2CAP_MODE_ERTM) { |
1089 | l2cap_pi(sk)->rx_busy_skb = skb; | |
1090 | l2cap_chan_busy(chan, 1); | |
e328140f MM |
1091 | err = 0; |
1092 | } | |
23070494 | 1093 | |
6be36555 AE |
1094 | done: |
1095 | release_sock(sk); | |
1096 | ||
e328140f | 1097 | return err; |
23070494 GP |
1098 | } |
1099 | ||
80b98027 | 1100 | static void l2cap_sock_close_cb(struct l2cap_chan *chan) |
ba3bd0ee | 1101 | { |
80b98027 | 1102 | struct sock *sk = chan->data; |
ba3bd0ee GP |
1103 | |
1104 | l2cap_sock_kill(sk); | |
1105 | } | |
1106 | ||
c0df7f6e AE |
1107 | static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err) |
1108 | { | |
1109 | struct sock *sk = chan->data; | |
1110 | struct sock *parent; | |
1111 | ||
1112 | lock_sock(sk); | |
1113 | ||
1114 | parent = bt_sk(sk)->parent; | |
1115 | ||
1116 | sock_set_flag(sk, SOCK_ZAPPED); | |
1117 | ||
1118 | switch (chan->state) { | |
1119 | case BT_OPEN: | |
1120 | case BT_BOUND: | |
1121 | case BT_CLOSED: | |
1122 | break; | |
1123 | case BT_LISTEN: | |
1124 | l2cap_sock_cleanup_listen(sk); | |
1125 | sk->sk_state = BT_CLOSED; | |
1126 | chan->state = BT_CLOSED; | |
1127 | ||
1128 | break; | |
1129 | default: | |
1130 | sk->sk_state = BT_CLOSED; | |
1131 | chan->state = BT_CLOSED; | |
1132 | ||
1133 | sk->sk_err = err; | |
1134 | ||
1135 | if (parent) { | |
1136 | bt_accept_unlink(sk); | |
1137 | parent->sk_data_ready(parent, 0); | |
1138 | } else { | |
1139 | sk->sk_state_change(sk); | |
1140 | } | |
1141 | ||
1142 | break; | |
1143 | } | |
1144 | ||
1145 | release_sock(sk); | |
1146 | } | |
1147 | ||
53f52121 GP |
1148 | static void l2cap_sock_state_change_cb(struct l2cap_chan *chan, int state, |
1149 | int err) | |
89bc500e | 1150 | { |
80b98027 | 1151 | struct sock *sk = chan->data; |
89bc500e GP |
1152 | |
1153 | sk->sk_state = state; | |
53f52121 GP |
1154 | |
1155 | if (err) | |
1156 | sk->sk_err = err; | |
89bc500e GP |
1157 | } |
1158 | ||
2f7719ce | 1159 | static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan, |
90338947 | 1160 | unsigned long len, int nb) |
2f7719ce | 1161 | { |
0f2c6153 | 1162 | struct sock *sk = chan->data; |
90338947 GP |
1163 | struct sk_buff *skb; |
1164 | int err; | |
1165 | ||
a6a5568c | 1166 | l2cap_chan_unlock(chan); |
0f2c6153 | 1167 | skb = bt_skb_send_alloc(sk, len, nb, &err); |
a6a5568c MM |
1168 | l2cap_chan_lock(chan); |
1169 | ||
90338947 GP |
1170 | if (!skb) |
1171 | return ERR_PTR(err); | |
2f7719ce | 1172 | |
90338947 | 1173 | return skb; |
2f7719ce AE |
1174 | } |
1175 | ||
54a59aa2 AE |
1176 | static void l2cap_sock_ready_cb(struct l2cap_chan *chan) |
1177 | { | |
1178 | struct sock *sk = chan->data; | |
1179 | struct sock *parent; | |
1180 | ||
1181 | lock_sock(sk); | |
1182 | ||
1183 | parent = bt_sk(sk)->parent; | |
1184 | ||
1185 | BT_DBG("sk %p, parent %p", sk, parent); | |
1186 | ||
1187 | sk->sk_state = BT_CONNECTED; | |
1188 | sk->sk_state_change(sk); | |
1189 | ||
1190 | if (parent) | |
1191 | parent->sk_data_ready(parent, 0); | |
1192 | ||
1193 | release_sock(sk); | |
1194 | } | |
1195 | ||
2dc4e510 GP |
1196 | static void l2cap_sock_defer_cb(struct l2cap_chan *chan) |
1197 | { | |
1198 | struct sock *sk = chan->data; | |
1199 | struct sock *parent = bt_sk(sk)->parent; | |
1200 | ||
1201 | if (parent) | |
1202 | parent->sk_data_ready(parent, 0); | |
1203 | } | |
1204 | ||
d97c899b MH |
1205 | static void l2cap_sock_resume_cb(struct l2cap_chan *chan) |
1206 | { | |
1207 | struct sock *sk = chan->data; | |
1208 | ||
1209 | clear_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); | |
1210 | sk->sk_state_change(sk); | |
1211 | } | |
1212 | ||
5ec1bbe5 GP |
1213 | static void l2cap_sock_set_shutdown_cb(struct l2cap_chan *chan) |
1214 | { | |
1215 | struct sock *sk = chan->data; | |
1216 | ||
1217 | lock_sock(sk); | |
1218 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1219 | release_sock(sk); | |
1220 | } | |
1221 | ||
8d836d71 GP |
1222 | static long l2cap_sock_get_sndtimeo_cb(struct l2cap_chan *chan) |
1223 | { | |
1224 | struct sock *sk = chan->data; | |
1225 | ||
1226 | return sk->sk_sndtimeo; | |
1227 | } | |
1228 | ||
80808e43 GP |
1229 | static struct l2cap_ops l2cap_chan_ops = { |
1230 | .name = "L2CAP Socket Interface", | |
1231 | .new_connection = l2cap_sock_new_connection_cb, | |
23070494 | 1232 | .recv = l2cap_sock_recv_cb, |
ba3bd0ee | 1233 | .close = l2cap_sock_close_cb, |
c0df7f6e | 1234 | .teardown = l2cap_sock_teardown_cb, |
89bc500e | 1235 | .state_change = l2cap_sock_state_change_cb, |
54a59aa2 | 1236 | .ready = l2cap_sock_ready_cb, |
2dc4e510 | 1237 | .defer = l2cap_sock_defer_cb, |
d97c899b | 1238 | .resume = l2cap_sock_resume_cb, |
5ec1bbe5 | 1239 | .set_shutdown = l2cap_sock_set_shutdown_cb, |
8d836d71 | 1240 | .get_sndtimeo = l2cap_sock_get_sndtimeo_cb, |
2f7719ce | 1241 | .alloc_skb = l2cap_sock_alloc_skb_cb, |
80808e43 GP |
1242 | }; |
1243 | ||
bb58f747 GP |
1244 | static void l2cap_sock_destruct(struct sock *sk) |
1245 | { | |
1246 | BT_DBG("sk %p", sk); | |
1247 | ||
23d3a869 SL |
1248 | if (l2cap_pi(sk)->chan) |
1249 | l2cap_chan_put(l2cap_pi(sk)->chan); | |
84b34d98 | 1250 | |
e328140f MM |
1251 | if (l2cap_pi(sk)->rx_busy_skb) { |
1252 | kfree_skb(l2cap_pi(sk)->rx_busy_skb); | |
1253 | l2cap_pi(sk)->rx_busy_skb = NULL; | |
1254 | } | |
1255 | ||
bb58f747 GP |
1256 | skb_queue_purge(&sk->sk_receive_queue); |
1257 | skb_queue_purge(&sk->sk_write_queue); | |
1258 | } | |
1259 | ||
2edf870d MH |
1260 | static void l2cap_skb_msg_name(struct sk_buff *skb, void *msg_name, |
1261 | int *msg_namelen) | |
1262 | { | |
1263 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) msg_name; | |
1264 | ||
1265 | memset(la, 0, sizeof(struct sockaddr_l2)); | |
1266 | la->l2_family = AF_BLUETOOTH; | |
1267 | la->l2_psm = bt_cb(skb)->psm; | |
1268 | bacpy(&la->l2_bdaddr, &bt_cb(skb)->bdaddr); | |
1269 | ||
1270 | *msg_namelen = sizeof(struct sockaddr_l2); | |
1271 | } | |
1272 | ||
80808e43 | 1273 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747 | 1274 | { |
84b34d98 | 1275 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
bb58f747 GP |
1276 | |
1277 | BT_DBG("sk %p", sk); | |
1278 | ||
1279 | if (parent) { | |
b4450035 GP |
1280 | struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
1281 | ||
bb58f747 | 1282 | sk->sk_type = parent->sk_type; |
c5daa683 | 1283 | bt_sk(sk)->flags = bt_sk(parent)->flags; |
bb58f747 | 1284 | |
715ec005 | 1285 | chan->chan_type = pchan->chan_type; |
0c1bc5c6 GP |
1286 | chan->imtu = pchan->imtu; |
1287 | chan->omtu = pchan->omtu; | |
b4450035 | 1288 | chan->conf_state = pchan->conf_state; |
0c1bc5c6 | 1289 | chan->mode = pchan->mode; |
47d1ec61 GP |
1290 | chan->fcs = pchan->fcs; |
1291 | chan->max_tx = pchan->max_tx; | |
1292 | chan->tx_win = pchan->tx_win; | |
6b3c7104 | 1293 | chan->tx_win_max = pchan->tx_win_max; |
4343478f | 1294 | chan->sec_level = pchan->sec_level; |
d57b0e8b | 1295 | chan->flags = pchan->flags; |
6230c9b4 PM |
1296 | |
1297 | security_sk_clone(parent, sk); | |
bb58f747 | 1298 | } else { |
715ec005 GP |
1299 | switch (sk->sk_type) { |
1300 | case SOCK_RAW: | |
1301 | chan->chan_type = L2CAP_CHAN_RAW; | |
1302 | break; | |
1303 | case SOCK_DGRAM: | |
1304 | chan->chan_type = L2CAP_CHAN_CONN_LESS; | |
2edf870d | 1305 | bt_sk(sk)->skb_msg_name = l2cap_skb_msg_name; |
715ec005 GP |
1306 | break; |
1307 | case SOCK_SEQPACKET: | |
1308 | case SOCK_STREAM: | |
1309 | chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; | |
1310 | break; | |
1311 | } | |
1312 | ||
0c1bc5c6 GP |
1313 | chan->imtu = L2CAP_DEFAULT_MTU; |
1314 | chan->omtu = 0; | |
bb58f747 | 1315 | if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c6 | 1316 | chan->mode = L2CAP_MODE_ERTM; |
c1360a1c | 1317 | set_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
bb58f747 | 1318 | } else { |
0c1bc5c6 | 1319 | chan->mode = L2CAP_MODE_BASIC; |
bb58f747 | 1320 | } |
bd4b1653 AE |
1321 | |
1322 | l2cap_chan_set_defaults(chan); | |
bb58f747 GP |
1323 | } |
1324 | ||
1325 | /* Default config options */ | |
0c1bc5c6 | 1326 | chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e43 GP |
1327 | |
1328 | chan->data = sk; | |
1329 | chan->ops = &l2cap_chan_ops; | |
bb58f747 GP |
1330 | } |
1331 | ||
1332 | static struct proto l2cap_proto = { | |
1333 | .name = "L2CAP", | |
1334 | .owner = THIS_MODULE, | |
1335 | .obj_size = sizeof(struct l2cap_pinfo) | |
1336 | }; | |
1337 | ||
2d792818 GP |
1338 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, |
1339 | int proto, gfp_t prio) | |
bb58f747 GP |
1340 | { |
1341 | struct sock *sk; | |
dc50a06d | 1342 | struct l2cap_chan *chan; |
bb58f747 GP |
1343 | |
1344 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); | |
1345 | if (!sk) | |
1346 | return NULL; | |
1347 | ||
1348 | sock_init_data(sock, sk); | |
1349 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
1350 | ||
1351 | sk->sk_destruct = l2cap_sock_destruct; | |
ba13ccd9 | 1352 | sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; |
bb58f747 GP |
1353 | |
1354 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1355 | ||
1356 | sk->sk_protocol = proto; | |
1357 | sk->sk_state = BT_OPEN; | |
1358 | ||
eef1d9b6 | 1359 | chan = l2cap_chan_create(); |
dc50a06d | 1360 | if (!chan) { |
49dfbb91 | 1361 | sk_free(sk); |
dc50a06d GP |
1362 | return NULL; |
1363 | } | |
1364 | ||
61d6ef3e MM |
1365 | l2cap_chan_hold(chan); |
1366 | ||
eef1d9b6 GP |
1367 | chan->sk = sk; |
1368 | ||
dc50a06d GP |
1369 | l2cap_pi(sk)->chan = chan; |
1370 | ||
bb58f747 GP |
1371 | return sk; |
1372 | } | |
1373 | ||
1374 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, | |
1375 | int kern) | |
1376 | { | |
1377 | struct sock *sk; | |
1378 | ||
1379 | BT_DBG("sock %p", sock); | |
1380 | ||
1381 | sock->state = SS_UNCONNECTED; | |
1382 | ||
1383 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && | |
2d792818 | 1384 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
bb58f747 GP |
1385 | return -ESOCKTNOSUPPORT; |
1386 | ||
1387 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) | |
1388 | return -EPERM; | |
1389 | ||
1390 | sock->ops = &l2cap_sock_ops; | |
1391 | ||
1392 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); | |
1393 | if (!sk) | |
1394 | return -ENOMEM; | |
1395 | ||
1396 | l2cap_sock_init(sk, NULL); | |
5b28d95c | 1397 | bt_sock_link(&l2cap_sk_list, sk); |
bb58f747 GP |
1398 | return 0; |
1399 | } | |
1400 | ||
cf2f90f5 | 1401 | static const struct proto_ops l2cap_sock_ops = { |
65390587 GP |
1402 | .family = PF_BLUETOOTH, |
1403 | .owner = THIS_MODULE, | |
1404 | .release = l2cap_sock_release, | |
1405 | .bind = l2cap_sock_bind, | |
1406 | .connect = l2cap_sock_connect, | |
1407 | .listen = l2cap_sock_listen, | |
1408 | .accept = l2cap_sock_accept, | |
1409 | .getname = l2cap_sock_getname, | |
1410 | .sendmsg = l2cap_sock_sendmsg, | |
1411 | .recvmsg = l2cap_sock_recvmsg, | |
1412 | .poll = bt_sock_poll, | |
1413 | .ioctl = bt_sock_ioctl, | |
1414 | .mmap = sock_no_mmap, | |
1415 | .socketpair = sock_no_socketpair, | |
1416 | .shutdown = l2cap_sock_shutdown, | |
1417 | .setsockopt = l2cap_sock_setsockopt, | |
1418 | .getsockopt = l2cap_sock_getsockopt | |
1419 | }; | |
1420 | ||
bb58f747 GP |
1421 | static const struct net_proto_family l2cap_sock_family_ops = { |
1422 | .family = PF_BLUETOOTH, | |
1423 | .owner = THIS_MODULE, | |
1424 | .create = l2cap_sock_create, | |
1425 | }; | |
1426 | ||
1427 | int __init l2cap_init_sockets(void) | |
1428 | { | |
e2174ca4 | 1429 | int err; |
bb58f747 | 1430 | |
e2174ca4 GP |
1431 | err = proto_register(&l2cap_proto, 0); |
1432 | if (err < 0) | |
1433 | return err; | |
bb58f747 | 1434 | |
e2174ca4 | 1435 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
5b28d95c MY |
1436 | if (err < 0) { |
1437 | BT_ERR("L2CAP socket registration failed"); | |
e2174ca4 | 1438 | goto error; |
5b28d95c MY |
1439 | } |
1440 | ||
b0316615 | 1441 | err = bt_procfs_init(&init_net, "l2cap", &l2cap_sk_list, |
2d792818 | 1442 | NULL); |
5b28d95c MY |
1443 | if (err < 0) { |
1444 | BT_ERR("Failed to create L2CAP proc file"); | |
1445 | bt_sock_unregister(BTPROTO_L2CAP); | |
1446 | goto error; | |
1447 | } | |
bb58f747 | 1448 | |
e2174ca4 | 1449 | BT_INFO("L2CAP socket layer initialized"); |
bb58f747 | 1450 | |
e2174ca4 | 1451 | return 0; |
bb58f747 GP |
1452 | |
1453 | error: | |
e2174ca4 GP |
1454 | proto_unregister(&l2cap_proto); |
1455 | return err; | |
bb58f747 GP |
1456 | } |
1457 | ||
1458 | void l2cap_cleanup_sockets(void) | |
1459 | { | |
5b28d95c | 1460 | bt_procfs_cleanup(&init_net, "l2cap"); |
5e9d7f86 | 1461 | bt_sock_unregister(BTPROTO_L2CAP); |
e2174ca4 | 1462 | proto_unregister(&l2cap_proto); |
bb58f747 | 1463 | } |