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