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Bluetooth: Add support for deferring L2CAP connection setup
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / bluetooth / sco.c
CommitLineData
8e87d142 1/*
1da177e4
LT		 2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4
5 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License version 2 as
9 published by the Free Software Foundation;
10
11 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
12 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
14 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
8e87d142
YH		 15 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
16 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1da177e4
LT		 18 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19
8e87d142
YH		 20 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
21 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4
LT		 22 SOFTWARE IS DISCLAIMED.
23*/
24
25/* Bluetooth SCO sockets. */
26
1da177e4
LT		 27#include <linux/module.h>
28
29#include <linux/types.h>
30#include <linux/errno.h>
31#include <linux/kernel.h>
1da177e4
LT		 32#include <linux/sched.h>
33#include <linux/slab.h>
34#include <linux/poll.h>
35#include <linux/fcntl.h>
36#include <linux/init.h>
37#include <linux/interrupt.h>
38#include <linux/socket.h>
39#include <linux/skbuff.h>
be9d1227 40#include <linux/device.h>
1da177e4
LT		 41#include <linux/list.h>
42#include <net/sock.h>
43
44#include <asm/system.h>
45#include <asm/uaccess.h>
46
47#include <net/bluetooth/bluetooth.h>
48#include <net/bluetooth/hci_core.h>
49#include <net/bluetooth/sco.h>
50
7cb127d5
MH		 51#define VERSION "0.6"
52
53static int disable_esco = 0;
1da177e4 54
90ddc4f0 55static const struct proto_ops sco_sock_ops;
1da177e4
LT		 56
57static struct bt_sock_list sco_sk_list = {
d5fb2962 58 .lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock)
1da177e4
LT		 59};
60
61static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent);
62static void sco_chan_del(struct sock *sk, int err);
63
64static int sco_conn_del(struct hci_conn *conn, int err);
65
66static void sco_sock_close(struct sock *sk);
67static void sco_sock_kill(struct sock *sk);
68
69/* ---- SCO timers ---- */
70static void sco_sock_timeout(unsigned long arg)
71{
72 struct sock *sk = (struct sock *) arg;
73
74 BT_DBG("sock %p state %d", sk, sk->sk_state);
75
76 bh_lock_sock(sk);
77 sk->sk_err = ETIMEDOUT;
78 sk->sk_state_change(sk);
79 bh_unlock_sock(sk);
80
81 sco_sock_kill(sk);
82 sock_put(sk);
83}
84
85static void sco_sock_set_timer(struct sock *sk, long timeout)
86{
87 BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
88 sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout);
89}
90
91static void sco_sock_clear_timer(struct sock *sk)
92{
93 BT_DBG("sock %p state %d", sk, sk->sk_state);
94 sk_stop_timer(sk, &sk->sk_timer);
95}
96
1da177e4
LT		 97/* ---- SCO connections ---- */
98static struct sco_conn *sco_conn_add(struct hci_conn *hcon, __u8 status)
99{
100 struct hci_dev *hdev = hcon->hdev;
25ea6db0 101 struct sco_conn *conn = hcon->sco_data;
1da177e4 102
25ea6db0 103 if (conn || status)
1da177e4
LT		 104 return conn;
105
25ea6db0
MH		 106 conn = kzalloc(sizeof(struct sco_conn), GFP_ATOMIC);
107 if (!conn)
1da177e4 108 return NULL;
1da177e4
LT		 109
110 spin_lock_init(&conn->lock);
111
112 hcon->sco_data = conn;
113 conn->hcon = hcon;
114
115 conn->src = &hdev->bdaddr;
116 conn->dst = &hcon->dst;
117
118 if (hdev->sco_mtu > 0)
119 conn->mtu = hdev->sco_mtu;
120 else
121 conn->mtu = 60;
122
123 BT_DBG("hcon %p conn %p", hcon, conn);
25ea6db0 124
1da177e4
LT		 125 return conn;
126}
127
128static inline struct sock *sco_chan_get(struct sco_conn *conn)
129{
130 struct sock *sk = NULL;
131 sco_conn_lock(conn);
132 sk = conn->sk;
133 sco_conn_unlock(conn);
134 return sk;
135}
136
137static int sco_conn_del(struct hci_conn *hcon, int err)
138{
139 struct sco_conn *conn;
140 struct sock *sk;
141
8e87d142 142 if (!(conn = hcon->sco_data))
1da177e4
LT		 143 return 0;
144
145 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
146
147 /* Kill socket */
148 if ((sk = sco_chan_get(conn))) {
149 bh_lock_sock(sk);
150 sco_sock_clear_timer(sk);
151 sco_chan_del(sk, err);
152 bh_unlock_sock(sk);
153 sco_sock_kill(sk);
154 }
155
156 hcon->sco_data = NULL;
157 kfree(conn);
158 return 0;
159}
160
161static inline int sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent)
162{
163 int err = 0;
164
165 sco_conn_lock(conn);
166 if (conn->sk) {
167 err = -EBUSY;
168 } else {
169 __sco_chan_add(conn, sk, parent);
170 }
171 sco_conn_unlock(conn);
172 return err;
173}
174
175static int sco_connect(struct sock *sk)
176{
177 bdaddr_t *src = &bt_sk(sk)->src;
178 bdaddr_t *dst = &bt_sk(sk)->dst;
179 struct sco_conn *conn;
180 struct hci_conn *hcon;
181 struct hci_dev *hdev;
b6a0dc82 182 int err, type;
1da177e4
LT		 183
184 BT_DBG("%s -> %s", batostr(src), batostr(dst));
185
186 if (!(hdev = hci_get_route(dst, src)))
187 return -EHOSTUNREACH;
188
189 hci_dev_lock_bh(hdev);
190
191 err = -ENOMEM;
192
7cb127d5
MH		 193 if (lmp_esco_capable(hdev) && !disable_esco)
194 type = ESCO_LINK;
195 else
196 type = SCO_LINK;
b6a0dc82 197
09ab6f4c 198 hcon = hci_connect(hdev, type, dst, HCI_AT_NO_BONDING);
1da177e4
LT		 199 if (!hcon)
200 goto done;
201
202 conn = sco_conn_add(hcon, 0);
203 if (!conn) {
204 hci_conn_put(hcon);
205 goto done;
206 }
207
208 /* Update source addr of the socket */
209 bacpy(src, conn->src);
210
211 err = sco_chan_add(conn, sk, NULL);
212 if (err)
213 goto done;
214
215 if (hcon->state == BT_CONNECTED) {
216 sco_sock_clear_timer(sk);
217 sk->sk_state = BT_CONNECTED;
218 } else {
219 sk->sk_state = BT_CONNECT;
220 sco_sock_set_timer(sk, sk->sk_sndtimeo);
221 }
b6a0dc82 222
1da177e4
LT		 223done:
224 hci_dev_unlock_bh(hdev);
225 hci_dev_put(hdev);
226 return err;
227}
228
229static inline int sco_send_frame(struct sock *sk, struct msghdr *msg, int len)
230{
231 struct sco_conn *conn = sco_pi(sk)->conn;
232 struct sk_buff *skb;
233 int err, count;
234
235 /* Check outgoing MTU */
236 if (len > conn->mtu)
237 return -EINVAL;
238
239 BT_DBG("sk %p len %d", sk, len);
240
241 count = min_t(unsigned int, conn->mtu, len);
242 if (!(skb = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err)))
243 return err;
244
245 if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) {
246 err = -EFAULT;
247 goto fail;
248 }
249
250 if ((err = hci_send_sco(conn->hcon, skb)) < 0)
cdee5751 251 return err;
1da177e4
LT		 252
253 return count;
254
255fail:
256 kfree_skb(skb);
257 return err;
258}
259
260static inline void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb)
261{
262 struct sock *sk = sco_chan_get(conn);
263
264 if (!sk)
265 goto drop;
266
267 BT_DBG("sk %p len %d", sk, skb->len);
268
269 if (sk->sk_state != BT_CONNECTED)
270 goto drop;
271
272 if (!sock_queue_rcv_skb(sk, skb))
273 return;
274
275drop:
276 kfree_skb(skb);
277 return;
278}
279
280/* -------- Socket interface ---------- */
281static struct sock *__sco_get_sock_by_addr(bdaddr_t *ba)
282{
283 struct sock *sk;
284 struct hlist_node *node;
285
286 sk_for_each(sk, node, &sco_sk_list.head)
287 if (!bacmp(&bt_sk(sk)->src, ba))
288 goto found;
289 sk = NULL;
290found:
291 return sk;
292}
293
294/* Find socket listening on source bdaddr.
295 * Returns closest match.
296 */
297static struct sock *sco_get_sock_listen(bdaddr_t *src)
298{
299 struct sock *sk = NULL, *sk1 = NULL;
300 struct hlist_node *node;
301
302 read_lock(&sco_sk_list.lock);
303
304 sk_for_each(sk, node, &sco_sk_list.head) {
305 if (sk->sk_state != BT_LISTEN)
306 continue;
307
308 /* Exact match. */
309 if (!bacmp(&bt_sk(sk)->src, src))
310 break;
311
312 /* Closest match */
313 if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY))
314 sk1 = sk;
315 }
316
317 read_unlock(&sco_sk_list.lock);
318
319 return node ? sk : sk1;
320}
321
322static void sco_sock_destruct(struct sock *sk)
323{
324 BT_DBG("sk %p", sk);
325
326 skb_queue_purge(&sk->sk_receive_queue);
327 skb_queue_purge(&sk->sk_write_queue);
328}
329
330static void sco_sock_cleanup_listen(struct sock *parent)
331{
332 struct sock *sk;
333
334 BT_DBG("parent %p", parent);
335
336 /* Close not yet accepted channels */
337 while ((sk = bt_accept_dequeue(parent, NULL))) {
338 sco_sock_close(sk);
339 sco_sock_kill(sk);
340 }
341
342 parent->sk_state = BT_CLOSED;
343 sock_set_flag(parent, SOCK_ZAPPED);
344}
345
346/* Kill socket (only if zapped and orphan)
347 * Must be called on unlocked socket.
348 */
349static void sco_sock_kill(struct sock *sk)
350{
351 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
352 return;
353
354 BT_DBG("sk %p state %d", sk, sk->sk_state);
355
356 /* Kill poor orphan */
357 bt_sock_unlink(&sco_sk_list, sk);
358 sock_set_flag(sk, SOCK_DEAD);
359 sock_put(sk);
360}
361
362/* Close socket.
363 * Must be called on unlocked socket.
364 */
365static void sco_sock_close(struct sock *sk)
366{
367 struct sco_conn *conn;
368
369 sco_sock_clear_timer(sk);
370
371 lock_sock(sk);
372
373 conn = sco_pi(sk)->conn;
374
375 BT_DBG("sk %p state %d conn %p socket %p", sk, sk->sk_state, conn, sk->sk_socket);
376
377 switch (sk->sk_state) {
378 case BT_LISTEN:
379 sco_sock_cleanup_listen(sk);
380 break;
381
382 case BT_CONNECTED:
383 case BT_CONFIG:
384 case BT_CONNECT:
385 case BT_DISCONN:
386 sco_chan_del(sk, ECONNRESET);
387 break;
388
389 default:
390 sock_set_flag(sk, SOCK_ZAPPED);
391 break;
3ff50b79 392 }
1da177e4
LT		 393
394 release_sock(sk);
395
396 sco_sock_kill(sk);
397}
398
399static void sco_sock_init(struct sock *sk, struct sock *parent)
400{
401 BT_DBG("sk %p", sk);
402
8e87d142 403 if (parent)
1da177e4
LT		 404 sk->sk_type = parent->sk_type;
405}
406
407static struct proto sco_proto = {
408 .name = "SCO",
409 .owner = THIS_MODULE,
410 .obj_size = sizeof(struct sco_pinfo)
411};
412
1b8d7ae4 413static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio)
1da177e4
LT		 414{
415 struct sock *sk;
416
6257ff21 417 sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto);
1da177e4
LT		 418 if (!sk)
419 return NULL;
420
421 sock_init_data(sock, sk);
422 INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
423
424 sk->sk_destruct = sco_sock_destruct;
425 sk->sk_sndtimeo = SCO_CONN_TIMEOUT;
426
427 sock_reset_flag(sk, SOCK_ZAPPED);
428
429 sk->sk_protocol = proto;
430 sk->sk_state = BT_OPEN;
431
b24b8a24 432 setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk);
1da177e4
LT		 433
434 bt_sock_link(&sco_sk_list, sk);
435 return sk;
436}
437
1b8d7ae4 438static int sco_sock_create(struct net *net, struct socket *sock, int protocol)
1da177e4
LT		 439{
440 struct sock *sk;
441
442 BT_DBG("sock %p", sock);
443
444 sock->state = SS_UNCONNECTED;
445
446 if (sock->type != SOCK_SEQPACKET)
447 return -ESOCKTNOSUPPORT;
448
449 sock->ops = &sco_sock_ops;
450
1b8d7ae4 451 sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC);
74da626a 452 if (!sk)
1da177e4
LT		 453 return -ENOMEM;
454
455 sco_sock_init(sk, NULL);
456 return 0;
457}
458
459static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
460{
461 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
462 struct sock *sk = sock->sk;
463 bdaddr_t *src = &sa->sco_bdaddr;
464 int err = 0;
465
466 BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr));
467
468 if (!addr || addr->sa_family != AF_BLUETOOTH)
469 return -EINVAL;
470
471 lock_sock(sk);
472
473 if (sk->sk_state != BT_OPEN) {
474 err = -EBADFD;
475 goto done;
476 }
477
478 write_lock_bh(&sco_sk_list.lock);
479
480 if (bacmp(src, BDADDR_ANY) && __sco_get_sock_by_addr(src)) {
481 err = -EADDRINUSE;
482 } else {
483 /* Save source address */
484 bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr);
485 sk->sk_state = BT_BOUND;
486 }
487
488 write_unlock_bh(&sco_sk_list.lock);
489
490done:
491 release_sock(sk);
492 return err;
493}
494
495static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
496{
497 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
498 struct sock *sk = sock->sk;
499 int err = 0;
500
501
502 BT_DBG("sk %p", sk);
503
504 if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_sco))
505 return -EINVAL;
506
507 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
508 return -EBADFD;
509
510 if (sk->sk_type != SOCK_SEQPACKET)
511 return -EINVAL;
512
513 lock_sock(sk);
514
515 /* Set destination address and psm */
516 bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr);
517
518 if ((err = sco_connect(sk)))
519 goto done;
520
8e87d142 521 err = bt_sock_wait_state(sk, BT_CONNECTED,
1da177e4
LT		 522 sock_sndtimeo(sk, flags & O_NONBLOCK));
523
524done:
525 release_sock(sk);
526 return err;
527}
528
529static int sco_sock_listen(struct socket *sock, int backlog)
530{
531 struct sock *sk = sock->sk;
532 int err = 0;
533
534 BT_DBG("sk %p backlog %d", sk, backlog);
535
536 lock_sock(sk);
537
538 if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) {
539 err = -EBADFD;
540 goto done;
541 }
542
543 sk->sk_max_ack_backlog = backlog;
544 sk->sk_ack_backlog = 0;
545 sk->sk_state = BT_LISTEN;
546
547done:
548 release_sock(sk);
549 return err;
550}
551
552static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags)
553{
554 DECLARE_WAITQUEUE(wait, current);
555 struct sock *sk = sock->sk, *ch;
556 long timeo;
557 int err = 0;
558
559 lock_sock(sk);
560
561 if (sk->sk_state != BT_LISTEN) {
562 err = -EBADFD;
563 goto done;
564 }
565
566 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
567
568 BT_DBG("sk %p timeo %ld", sk, timeo);
569
570 /* Wait for an incoming connection. (wake-one). */
571 add_wait_queue_exclusive(sk->sk_sleep, &wait);
572 while (!(ch = bt_accept_dequeue(sk, newsock))) {
573 set_current_state(TASK_INTERRUPTIBLE);
574 if (!timeo) {
575 err = -EAGAIN;
576 break;
577 }
578
579 release_sock(sk);
580 timeo = schedule_timeout(timeo);
581 lock_sock(sk);
582
583 if (sk->sk_state != BT_LISTEN) {
584 err = -EBADFD;
585 break;
586 }
587
588 if (signal_pending(current)) {
589 err = sock_intr_errno(timeo);
590 break;
591 }
592 }
593 set_current_state(TASK_RUNNING);
594 remove_wait_queue(sk->sk_sleep, &wait);
595
596 if (err)
597 goto done;
598
599 newsock->state = SS_CONNECTED;
600
601 BT_DBG("new socket %p", ch);
602
603done:
604 release_sock(sk);
605 return err;
606}
607
608static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer)
609{
610 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
611 struct sock *sk = sock->sk;
612
613 BT_DBG("sock %p, sk %p", sock, sk);
614
615 addr->sa_family = AF_BLUETOOTH;
616 *len = sizeof(struct sockaddr_sco);
617
618 if (peer)
619 bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst);
620 else
621 bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src);
622
623 return 0;
624}
625
8e87d142 626static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
1da177e4
LT		 627 struct msghdr *msg, size_t len)
628{
629 struct sock *sk = sock->sk;
630 int err = 0;
631
632 BT_DBG("sock %p, sk %p", sock, sk);
633
c1cbe4b7
BL		 634 err = sock_error(sk);
635 if (err)
636 return err;
1da177e4
LT		 637
638 if (msg->msg_flags & MSG_OOB)
639 return -EOPNOTSUPP;
640
641 lock_sock(sk);
642
643 if (sk->sk_state == BT_CONNECTED)
644 err = sco_send_frame(sk, msg, len);
645 else
646 err = -ENOTCONN;
647
648 release_sock(sk);
649 return err;
650}
651
652static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
653{
654 struct sock *sk = sock->sk;
655 int err = 0;
656
657 BT_DBG("sk %p", sk);
658
659 lock_sock(sk);
660
661 switch (optname) {
662 default:
663 err = -ENOPROTOOPT;
664 break;
665 }
666
667 release_sock(sk);
668 return err;
669}
670
d58daf42 671static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen)
1da177e4
LT		 672{
673 struct sock *sk = sock->sk;
674 struct sco_options opts;
675 struct sco_conninfo cinfo;
8e87d142 676 int len, err = 0;
1da177e4
LT		 677
678 BT_DBG("sk %p", sk);
679
680 if (get_user(len, optlen))
681 return -EFAULT;
682
683 lock_sock(sk);
684
685 switch (optname) {
686 case SCO_OPTIONS:
687 if (sk->sk_state != BT_CONNECTED) {
688 err = -ENOTCONN;
689 break;
690 }
691
692 opts.mtu = sco_pi(sk)->conn->mtu;
693
694 BT_DBG("mtu %d", opts.mtu);
695
696 len = min_t(unsigned int, len, sizeof(opts));
697 if (copy_to_user(optval, (char *)&opts, len))
698 err = -EFAULT;
699
700 break;
701
702 case SCO_CONNINFO:
703 if (sk->sk_state != BT_CONNECTED) {
704 err = -ENOTCONN;
705 break;
706 }
707
708 cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle;
709 memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3);
710
711 len = min_t(unsigned int, len, sizeof(cinfo));
712 if (copy_to_user(optval, (char *)&cinfo, len))
713 err = -EFAULT;
714
715 break;
716
717 default:
718 err = -ENOPROTOOPT;
719 break;
720 }
721
722 release_sock(sk);
723 return err;
724}
725
d58daf42
MH		 726static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
727{
728 struct sock *sk = sock->sk;
729 int len, err = 0;
730
731 BT_DBG("sk %p", sk);
732
733 if (level == SOL_SCO)
734 return sco_sock_getsockopt_old(sock, optname, optval, optlen);
735
736 if (get_user(len, optlen))
737 return -EFAULT;
738
739 lock_sock(sk);
740
741 switch (optname) {
742 default:
743 err = -ENOPROTOOPT;
744 break;
745 }
746
747 release_sock(sk);
748 return err;
749}
750
1da177e4
LT		 751static int sco_sock_release(struct socket *sock)
752{
753 struct sock *sk = sock->sk;
754 int err = 0;
755
756 BT_DBG("sock %p, sk %p", sock, sk);
757
758 if (!sk)
759 return 0;
760
761 sco_sock_close(sk);
762
763 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) {
764 lock_sock(sk);
765 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
766 release_sock(sk);
767 }
768
769 sock_orphan(sk);
770 sco_sock_kill(sk);
771 return err;
772}
773
774static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent)
775{
776 BT_DBG("conn %p", conn);
777
778 sco_pi(sk)->conn = conn;
779 conn->sk = sk;
780
781 if (parent)
782 bt_accept_enqueue(parent, sk);
783}
784
8e87d142 785/* Delete channel.
1da177e4
LT		 786 * Must be called on the locked socket. */
787static void sco_chan_del(struct sock *sk, int err)
788{
789 struct sco_conn *conn;
790
791 conn = sco_pi(sk)->conn;
792
793 BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
794
8e87d142 795 if (conn) {
1da177e4
LT		 796 sco_conn_lock(conn);
797 conn->sk = NULL;
798 sco_pi(sk)->conn = NULL;
799 sco_conn_unlock(conn);
800 hci_conn_put(conn->hcon);
801 }
802
803 sk->sk_state = BT_CLOSED;
804 sk->sk_err = err;
805 sk->sk_state_change(sk);
806
807 sock_set_flag(sk, SOCK_ZAPPED);
808}
809
810static void sco_conn_ready(struct sco_conn *conn)
811{
812 struct sock *parent, *sk;
813
814 BT_DBG("conn %p", conn);
815
816 sco_conn_lock(conn);
817
818 if ((sk = conn->sk)) {
819 sco_sock_clear_timer(sk);
820 bh_lock_sock(sk);
821 sk->sk_state = BT_CONNECTED;
822 sk->sk_state_change(sk);
823 bh_unlock_sock(sk);
824 } else {
825 parent = sco_get_sock_listen(conn->src);
826 if (!parent)
827 goto done;
828
829 bh_lock_sock(parent);
830
3b1e0a65 831 sk = sco_sock_alloc(sock_net(parent), NULL, BTPROTO_SCO, GFP_ATOMIC);
1da177e4
LT		 832 if (!sk) {
833 bh_unlock_sock(parent);
834 goto done;
835 }
836
837 sco_sock_init(sk, parent);
838
839 bacpy(&bt_sk(sk)->src, conn->src);
840 bacpy(&bt_sk(sk)->dst, conn->dst);
841
842 hci_conn_hold(conn->hcon);
843 __sco_chan_add(conn, sk, parent);
844
845 sk->sk_state = BT_CONNECTED;
846
847 /* Wake up parent */
848 parent->sk_data_ready(parent, 1);
849
850 bh_unlock_sock(parent);
851 }
852
853done:
854 sco_conn_unlock(conn);
855}
856
857/* ----- SCO interface with lower layer (HCI) ----- */
858static int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type)
859{
860 BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr));
861
862 /* Always accept connection */
863 return HCI_LM_ACCEPT;
864}
865
866static int sco_connect_cfm(struct hci_conn *hcon, __u8 status)
867{
868 BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status);
869
b6a0dc82 870 if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
1da177e4
LT		 871 return 0;
872
873 if (!status) {
874 struct sco_conn *conn;
875
876 conn = sco_conn_add(hcon, status);
877 if (conn)
878 sco_conn_ready(conn);
8e87d142 879 } else
1da177e4
LT		 880 sco_conn_del(hcon, bt_err(status));
881
882 return 0;
883}
884
885static int sco_disconn_ind(struct hci_conn *hcon, __u8 reason)
886{
887 BT_DBG("hcon %p reason %d", hcon, reason);
888
b6a0dc82 889 if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
1da177e4
LT		 890 return 0;
891
892 sco_conn_del(hcon, bt_err(reason));
b6a0dc82 893
1da177e4
LT		 894 return 0;
895}
896
897static int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
898{
899 struct sco_conn *conn = hcon->sco_data;
900
901 if (!conn)
902 goto drop;
903
904 BT_DBG("conn %p len %d", conn, skb->len);
905
906 if (skb->len) {
907 sco_recv_frame(conn, skb);
908 return 0;
909 }
910
911drop:
8e87d142 912 kfree_skb(skb);
1da177e4
LT		 913 return 0;
914}
915
be9d1227 916static ssize_t sco_sysfs_show(struct class *dev, char *buf)
1da177e4
LT		 917{
918 struct sock *sk;
919 struct hlist_node *node;
be9d1227 920 char *str = buf;
1da177e4
LT		 921
922 read_lock_bh(&sco_sk_list.lock);
923
be9d1227
MH		 924 sk_for_each(sk, node, &sco_sk_list.head) {
925 str += sprintf(str, "%s %s %d\n",
926 batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst),
927 sk->sk_state);
928 }
1da177e4 929
1da177e4 930 read_unlock_bh(&sco_sk_list.lock);
1da177e4 931
be9d1227 932 return (str - buf);
1da177e4
LT		 933}
934
be9d1227 935static CLASS_ATTR(sco, S_IRUGO, sco_sysfs_show, NULL);
1da177e4 936
90ddc4f0 937static const struct proto_ops sco_sock_ops = {
1da177e4
LT		 938 .family = PF_BLUETOOTH,
939 .owner = THIS_MODULE,
940 .release = sco_sock_release,
941 .bind = sco_sock_bind,
942 .connect = sco_sock_connect,
943 .listen = sco_sock_listen,
944 .accept = sco_sock_accept,
945 .getname = sco_sock_getname,
946 .sendmsg = sco_sock_sendmsg,
947 .recvmsg = bt_sock_recvmsg,
948 .poll = bt_sock_poll,
3241ad82 949 .ioctl = bt_sock_ioctl,
1da177e4
LT		 950 .mmap = sock_no_mmap,
951 .socketpair = sock_no_socketpair,
952 .shutdown = sock_no_shutdown,
953 .setsockopt = sco_sock_setsockopt,
954 .getsockopt = sco_sock_getsockopt
955};
956
957static struct net_proto_family sco_sock_family_ops = {
958 .family = PF_BLUETOOTH,
959 .owner = THIS_MODULE,
960 .create = sco_sock_create,
961};
962
963static struct hci_proto sco_hci_proto = {
964 .name = "SCO",
965 .id = HCI_PROTO_SCO,
966 .connect_ind = sco_connect_ind,
967 .connect_cfm = sco_connect_cfm,
968 .disconn_ind = sco_disconn_ind,
969 .recv_scodata = sco_recv_scodata
970};
971
972static int __init sco_init(void)
973{
974 int err;
975
976 err = proto_register(&sco_proto, 0);
977 if (err < 0)
978 return err;
979
980 err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops);
981 if (err < 0) {
982 BT_ERR("SCO socket registration failed");
983 goto error;
984 }
985
986 err = hci_register_proto(&sco_hci_proto);
987 if (err < 0) {
988 BT_ERR("SCO protocol registration failed");
989 bt_sock_unregister(BTPROTO_SCO);
990 goto error;
991 }
992
df5c37ea
MH		 993 if (class_create_file(bt_class, &class_attr_sco) < 0)
994 BT_ERR("Failed to create SCO info file");
1da177e4
LT		 995
996 BT_INFO("SCO (Voice Link) ver %s", VERSION);
997 BT_INFO("SCO socket layer initialized");
998
999 return 0;
1000
1001error:
1002 proto_unregister(&sco_proto);
1003 return err;
1004}
1005
1006static void __exit sco_exit(void)
1007{
a91f2e39 1008 class_remove_file(bt_class, &class_attr_sco);
1da177e4
LT		 1009
1010 if (bt_sock_unregister(BTPROTO_SCO) < 0)
1011 BT_ERR("SCO socket unregistration failed");
1012
1013 if (hci_unregister_proto(&sco_hci_proto) < 0)
1014 BT_ERR("SCO protocol unregistration failed");
1015
1016 proto_unregister(&sco_proto);
1017}
1018
1019module_init(sco_init);
1020module_exit(sco_exit);
1021
7cb127d5
MH		 1022module_param(disable_esco, bool, 0644);
1023MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation");
1024
63fbd24e 1025MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
1da177e4
LT		 1026MODULE_DESCRIPTION("Bluetooth SCO ver " VERSION);
1027MODULE_VERSION(VERSION);
1028MODULE_LICENSE("GPL");
1029MODULE_ALIAS("bt-proto-2");
kernel source for telekom puls (alcatel/mediatek)