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