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[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / bluetooth / sco.c
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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
51#ifndef CONFIG_BT_SCO_DEBUG
52#undef BT_DBG
53#define BT_DBG(D...)
54#endif
55
be9d1227 56#define VERSION "0.5"
1da177e4 57
90ddc4f0 58static const struct proto_ops sco_sock_ops;
1da177e4
LT		 59
60static struct bt_sock_list sco_sk_list = {
61 .lock = RW_LOCK_UNLOCKED
62};
63
64static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent);
65static void sco_chan_del(struct sock *sk, int err);
66
67static int sco_conn_del(struct hci_conn *conn, int err);
68
69static void sco_sock_close(struct sock *sk);
70static void sco_sock_kill(struct sock *sk);
71
72/* ---- SCO timers ---- */
73static void sco_sock_timeout(unsigned long arg)
74{
75 struct sock *sk = (struct sock *) arg;
76
77 BT_DBG("sock %p state %d", sk, sk->sk_state);
78
79 bh_lock_sock(sk);
80 sk->sk_err = ETIMEDOUT;
81 sk->sk_state_change(sk);
82 bh_unlock_sock(sk);
83
84 sco_sock_kill(sk);
85 sock_put(sk);
86}
87
88static void sco_sock_set_timer(struct sock *sk, long timeout)
89{
90 BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
91 sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout);
92}
93
94static void sco_sock_clear_timer(struct sock *sk)
95{
96 BT_DBG("sock %p state %d", sk, sk->sk_state);
97 sk_stop_timer(sk, &sk->sk_timer);
98}
99
1da177e4
LT		 100/* ---- SCO connections ---- */
101static struct sco_conn *sco_conn_add(struct hci_conn *hcon, __u8 status)
102{
103 struct hci_dev *hdev = hcon->hdev;
25ea6db0 104 struct sco_conn *conn = hcon->sco_data;
1da177e4 105
25ea6db0 106 if (conn || status)
1da177e4
LT		 107 return conn;
108
25ea6db0
MH		 109 conn = kzalloc(sizeof(struct sco_conn), GFP_ATOMIC);
110 if (!conn)
1da177e4 111 return NULL;
1da177e4
LT		 112
113 spin_lock_init(&conn->lock);
114
115 hcon->sco_data = conn;
116 conn->hcon = hcon;
117
118 conn->src = &hdev->bdaddr;
119 conn->dst = &hcon->dst;
120
121 if (hdev->sco_mtu > 0)
122 conn->mtu = hdev->sco_mtu;
123 else
124 conn->mtu = 60;
125
126 BT_DBG("hcon %p conn %p", hcon, conn);
25ea6db0 127
1da177e4
LT		 128 return conn;
129}
130
131static inline struct sock *sco_chan_get(struct sco_conn *conn)
132{
133 struct sock *sk = NULL;
134 sco_conn_lock(conn);
135 sk = conn->sk;
136 sco_conn_unlock(conn);
137 return sk;
138}
139
140static int sco_conn_del(struct hci_conn *hcon, int err)
141{
142 struct sco_conn *conn;
143 struct sock *sk;
144
8e87d142 145 if (!(conn = hcon->sco_data))
1da177e4
LT		 146 return 0;
147
148 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
149
150 /* Kill socket */
151 if ((sk = sco_chan_get(conn))) {
152 bh_lock_sock(sk);
153 sco_sock_clear_timer(sk);
154 sco_chan_del(sk, err);
155 bh_unlock_sock(sk);
156 sco_sock_kill(sk);
157 }
158
159 hcon->sco_data = NULL;
160 kfree(conn);
161 return 0;
162}
163
164static inline int sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent)
165{
166 int err = 0;
167
168 sco_conn_lock(conn);
169 if (conn->sk) {
170 err = -EBUSY;
171 } else {
172 __sco_chan_add(conn, sk, parent);
173 }
174 sco_conn_unlock(conn);
175 return err;
176}
177
178static int sco_connect(struct sock *sk)
179{
180 bdaddr_t *src = &bt_sk(sk)->src;
181 bdaddr_t *dst = &bt_sk(sk)->dst;
182 struct sco_conn *conn;
183 struct hci_conn *hcon;
184 struct hci_dev *hdev;
b6a0dc82 185 int err, type;
1da177e4
LT		 186
187 BT_DBG("%s -> %s", batostr(src), batostr(dst));
188
189 if (!(hdev = hci_get_route(dst, src)))
190 return -EHOSTUNREACH;
191
192 hci_dev_lock_bh(hdev);
193
194 err = -ENOMEM;
195
b6a0dc82
MH		 196 type = lmp_esco_capable(hdev) ? ESCO_LINK : SCO_LINK;
197
198 hcon = hci_connect(hdev, type, dst);
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
671static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
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
726static int sco_sock_release(struct socket *sock)
727{
728 struct sock *sk = sock->sk;
729 int err = 0;
730
731 BT_DBG("sock %p, sk %p", sock, sk);
732
733 if (!sk)
734 return 0;
735
736 sco_sock_close(sk);
737
738 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) {
739 lock_sock(sk);
740 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
741 release_sock(sk);
742 }
743
744 sock_orphan(sk);
745 sco_sock_kill(sk);
746 return err;
747}
748
749static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent)
750{
751 BT_DBG("conn %p", conn);
752
753 sco_pi(sk)->conn = conn;
754 conn->sk = sk;
755
756 if (parent)
757 bt_accept_enqueue(parent, sk);
758}
759
8e87d142 760/* Delete channel.
1da177e4
LT		 761 * Must be called on the locked socket. */
762static void sco_chan_del(struct sock *sk, int err)
763{
764 struct sco_conn *conn;
765
766 conn = sco_pi(sk)->conn;
767
768 BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
769
8e87d142 770 if (conn) {
1da177e4
LT		 771 sco_conn_lock(conn);
772 conn->sk = NULL;
773 sco_pi(sk)->conn = NULL;
774 sco_conn_unlock(conn);
775 hci_conn_put(conn->hcon);
776 }
777
778 sk->sk_state = BT_CLOSED;
779 sk->sk_err = err;
780 sk->sk_state_change(sk);
781
782 sock_set_flag(sk, SOCK_ZAPPED);
783}
784
785static void sco_conn_ready(struct sco_conn *conn)
786{
787 struct sock *parent, *sk;
788
789 BT_DBG("conn %p", conn);
790
791 sco_conn_lock(conn);
792
793 if ((sk = conn->sk)) {
794 sco_sock_clear_timer(sk);
795 bh_lock_sock(sk);
796 sk->sk_state = BT_CONNECTED;
797 sk->sk_state_change(sk);
798 bh_unlock_sock(sk);
799 } else {
800 parent = sco_get_sock_listen(conn->src);
801 if (!parent)
802 goto done;
803
804 bh_lock_sock(parent);
805
1b8d7ae4 806 sk = sco_sock_alloc(parent->sk_net, NULL, BTPROTO_SCO, GFP_ATOMIC);
1da177e4
LT		 807 if (!sk) {
808 bh_unlock_sock(parent);
809 goto done;
810 }
811
812 sco_sock_init(sk, parent);
813
814 bacpy(&bt_sk(sk)->src, conn->src);
815 bacpy(&bt_sk(sk)->dst, conn->dst);
816
817 hci_conn_hold(conn->hcon);
818 __sco_chan_add(conn, sk, parent);
819
820 sk->sk_state = BT_CONNECTED;
821
822 /* Wake up parent */
823 parent->sk_data_ready(parent, 1);
824
825 bh_unlock_sock(parent);
826 }
827
828done:
829 sco_conn_unlock(conn);
830}
831
832/* ----- SCO interface with lower layer (HCI) ----- */
833static int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type)
834{
835 BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr));
836
837 /* Always accept connection */
838 return HCI_LM_ACCEPT;
839}
840
841static int sco_connect_cfm(struct hci_conn *hcon, __u8 status)
842{
843 BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status);
844
b6a0dc82 845 if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
1da177e4
LT		 846 return 0;
847
848 if (!status) {
849 struct sco_conn *conn;
850
851 conn = sco_conn_add(hcon, status);
852 if (conn)
853 sco_conn_ready(conn);
8e87d142 854 } else
1da177e4
LT		 855 sco_conn_del(hcon, bt_err(status));
856
857 return 0;
858}
859
860static int sco_disconn_ind(struct hci_conn *hcon, __u8 reason)
861{
862 BT_DBG("hcon %p reason %d", hcon, reason);
863
b6a0dc82 864 if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
1da177e4
LT		 865 return 0;
866
867 sco_conn_del(hcon, bt_err(reason));
b6a0dc82 868
1da177e4
LT		 869 return 0;
870}
871
872static int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
873{
874 struct sco_conn *conn = hcon->sco_data;
875
876 if (!conn)
877 goto drop;
878
879 BT_DBG("conn %p len %d", conn, skb->len);
880
881 if (skb->len) {
882 sco_recv_frame(conn, skb);
883 return 0;
884 }
885
886drop:
8e87d142 887 kfree_skb(skb);
1da177e4
LT		 888 return 0;
889}
890
be9d1227 891static ssize_t sco_sysfs_show(struct class *dev, char *buf)
1da177e4
LT		 892{
893 struct sock *sk;
894 struct hlist_node *node;
be9d1227 895 char *str = buf;
1da177e4
LT		 896
897 read_lock_bh(&sco_sk_list.lock);
898
be9d1227
MH		 899 sk_for_each(sk, node, &sco_sk_list.head) {
900 str += sprintf(str, "%s %s %d\n",
901 batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst),
902 sk->sk_state);
903 }
1da177e4 904
1da177e4 905 read_unlock_bh(&sco_sk_list.lock);
1da177e4 906
be9d1227 907 return (str - buf);
1da177e4
LT		 908}
909
be9d1227 910static CLASS_ATTR(sco, S_IRUGO, sco_sysfs_show, NULL);
1da177e4 911
90ddc4f0 912static const struct proto_ops sco_sock_ops = {
1da177e4
LT		 913 .family = PF_BLUETOOTH,
914 .owner = THIS_MODULE,
915 .release = sco_sock_release,
916 .bind = sco_sock_bind,
917 .connect = sco_sock_connect,
918 .listen = sco_sock_listen,
919 .accept = sco_sock_accept,
920 .getname = sco_sock_getname,
921 .sendmsg = sco_sock_sendmsg,
922 .recvmsg = bt_sock_recvmsg,
923 .poll = bt_sock_poll,
924 .ioctl = sock_no_ioctl,
925 .mmap = sock_no_mmap,
926 .socketpair = sock_no_socketpair,
927 .shutdown = sock_no_shutdown,
928 .setsockopt = sco_sock_setsockopt,
929 .getsockopt = sco_sock_getsockopt
930};
931
932static struct net_proto_family sco_sock_family_ops = {
933 .family = PF_BLUETOOTH,
934 .owner = THIS_MODULE,
935 .create = sco_sock_create,
936};
937
938static struct hci_proto sco_hci_proto = {
939 .name = "SCO",
940 .id = HCI_PROTO_SCO,
941 .connect_ind = sco_connect_ind,
942 .connect_cfm = sco_connect_cfm,
943 .disconn_ind = sco_disconn_ind,
944 .recv_scodata = sco_recv_scodata
945};
946
947static int __init sco_init(void)
948{
949 int err;
950
951 err = proto_register(&sco_proto, 0);
952 if (err < 0)
953 return err;
954
955 err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops);
956 if (err < 0) {
957 BT_ERR("SCO socket registration failed");
958 goto error;
959 }
960
961 err = hci_register_proto(&sco_hci_proto);
962 if (err < 0) {
963 BT_ERR("SCO protocol registration failed");
964 bt_sock_unregister(BTPROTO_SCO);
965 goto error;
966 }
967
df5c37ea
MH		 968 if (class_create_file(bt_class, &class_attr_sco) < 0)
969 BT_ERR("Failed to create SCO info file");
1da177e4
LT		 970
971 BT_INFO("SCO (Voice Link) ver %s", VERSION);
972 BT_INFO("SCO socket layer initialized");
973
974 return 0;
975
976error:
977 proto_unregister(&sco_proto);
978 return err;
979}
980
981static void __exit sco_exit(void)
982{
a91f2e39 983 class_remove_file(bt_class, &class_attr_sco);
1da177e4
LT		 984
985 if (bt_sock_unregister(BTPROTO_SCO) < 0)
986 BT_ERR("SCO socket unregistration failed");
987
988 if (hci_unregister_proto(&sco_hci_proto) < 0)
989 BT_ERR("SCO protocol unregistration failed");
990
991 proto_unregister(&sco_proto);
992}
993
994module_init(sco_init);
995module_exit(sco_exit);
996
997MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>");
998MODULE_DESCRIPTION("Bluetooth SCO ver " VERSION);
999MODULE_VERSION(VERSION);
1000MODULE_LICENSE("GPL");
1001MODULE_ALIAS("bt-proto-2");
kernel source for telekom puls (alcatel/mediatek)