tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
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
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
18 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19
20 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
21 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
22 SOFTWARE IS DISCLAIMED.
23*/
24
25/* Bluetooth SCO sockets. */
26
27#include <linux/module.h>
28#include <linux/debugfs.h>
29#include <linux/seq_file.h>
30#include <linux/sched/signal.h>
31
32#include <net/bluetooth/bluetooth.h>
33#include <net/bluetooth/hci_core.h>
34#include <net/bluetooth/sco.h>
35
36static bool disable_esco;
37
38static const struct proto_ops sco_sock_ops;
39
40static struct bt_sock_list sco_sk_list = {
41 .lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock)
42};
43
44/* ---- SCO connections ---- */
45struct sco_conn {
46 struct hci_conn *hcon;
47
48 spinlock_t lock;
49 struct sock *sk;
50
51 unsigned int mtu;
52};
53
54#define sco_conn_lock(c) spin_lock(&c->lock);
55#define sco_conn_unlock(c) spin_unlock(&c->lock);
56
57static void sco_sock_close(struct sock *sk);
58static void sco_sock_kill(struct sock *sk);
59
60/* ----- SCO socket info ----- */
61#define sco_pi(sk) ((struct sco_pinfo *) sk)
62
63struct sco_pinfo {
64 struct bt_sock bt;
65 bdaddr_t src;
66 bdaddr_t dst;
67 __u32 flags;
68 __u16 setting;
69 struct sco_conn *conn;
70};
71
72/* ---- SCO timers ---- */
73#define SCO_CONN_TIMEOUT (HZ * 40)
74#define SCO_DISCONN_TIMEOUT (HZ * 2)
75
76static void sco_sock_timeout(struct timer_list *t)
77{
78 struct sock *sk = from_timer(sk, t, sk_timer);
79
80 BT_DBG("sock %p state %d", sk, sk->sk_state);
81
82 bh_lock_sock(sk);
83 sk->sk_err = ETIMEDOUT;
84 sk->sk_state_change(sk);
85 bh_unlock_sock(sk);
86
87 sco_sock_kill(sk);
88 sock_put(sk);
89}
90
91static void sco_sock_set_timer(struct sock *sk, long timeout)
92{
93 BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
94 sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout);
95}
96
97static void sco_sock_clear_timer(struct sock *sk)
98{
99 BT_DBG("sock %p state %d", sk, sk->sk_state);
100 sk_stop_timer(sk, &sk->sk_timer);
101}
102
103/* ---- SCO connections ---- */
104static struct sco_conn *sco_conn_add(struct hci_conn *hcon)
105{
106 struct hci_dev *hdev = hcon->hdev;
107 struct sco_conn *conn = hcon->sco_data;
108
109 if (conn)
110 return conn;
111
112 conn = kzalloc(sizeof(struct sco_conn), GFP_KERNEL);
113 if (!conn)
114 return NULL;
115
116 spin_lock_init(&conn->lock);
117
118 hcon->sco_data = conn;
119 conn->hcon = hcon;
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);
127
128 return conn;
129}
130
131/* Delete channel.
132 * Must be called on the locked socket. */
133static void sco_chan_del(struct sock *sk, int err)
134{
135 struct sco_conn *conn;
136
137 conn = sco_pi(sk)->conn;
138
139 BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
140
141 if (conn) {
142 sco_conn_lock(conn);
143 conn->sk = NULL;
144 sco_pi(sk)->conn = NULL;
145 sco_conn_unlock(conn);
146
147 if (conn->hcon)
148 hci_conn_drop(conn->hcon);
149 }
150
151 sk->sk_state = BT_CLOSED;
152 sk->sk_err = err;
153 sk->sk_state_change(sk);
154
155 sock_set_flag(sk, SOCK_ZAPPED);
156}
157
158static void sco_conn_del(struct hci_conn *hcon, int err)
159{
160 struct sco_conn *conn = hcon->sco_data;
161 struct sock *sk;
162
163 if (!conn)
164 return;
165
166 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
167
168 /* Kill socket */
169 sco_conn_lock(conn);
170 sk = conn->sk;
171 sco_conn_unlock(conn);
172
173 if (sk) {
174 sock_hold(sk);
175 bh_lock_sock(sk);
176 sco_sock_clear_timer(sk);
177 sco_chan_del(sk, err);
178 bh_unlock_sock(sk);
179 sco_sock_kill(sk);
180 sock_put(sk);
181 }
182
183 hcon->sco_data = NULL;
184 kfree(conn);
185}
186
187static void __sco_chan_add(struct sco_conn *conn, struct sock *sk,
188 struct sock *parent)
189{
190 BT_DBG("conn %p", conn);
191
192 sco_pi(sk)->conn = conn;
193 conn->sk = sk;
194
195 if (parent)
196 bt_accept_enqueue(parent, sk, true);
197}
198
199static int sco_chan_add(struct sco_conn *conn, struct sock *sk,
200 struct sock *parent)
201{
202 int err = 0;
203
204 sco_conn_lock(conn);
205 if (conn->sk)
206 err = -EBUSY;
207 else
208 __sco_chan_add(conn, sk, parent);
209
210 sco_conn_unlock(conn);
211 return err;
212}
213
214static int sco_connect(struct sock *sk)
215{
216 struct sco_conn *conn;
217 struct hci_conn *hcon;
218 struct hci_dev *hdev;
219 int err, type;
220
221 BT_DBG("%pMR -> %pMR", &sco_pi(sk)->src, &sco_pi(sk)->dst);
222
223 hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src, BDADDR_BREDR);
224 if (!hdev)
225 return -EHOSTUNREACH;
226
227 hci_dev_lock(hdev);
228
229 if (lmp_esco_capable(hdev) && !disable_esco)
230 type = ESCO_LINK;
231 else
232 type = SCO_LINK;
233
234 if (sco_pi(sk)->setting == BT_VOICE_TRANSPARENT &&
235 (!lmp_transp_capable(hdev) || !lmp_esco_capable(hdev))) {
236 err = -EOPNOTSUPP;
237 goto done;
238 }
239
240 hcon = hci_connect_sco(hdev, type, &sco_pi(sk)->dst,
241 sco_pi(sk)->setting);
242 if (IS_ERR(hcon)) {
243 err = PTR_ERR(hcon);
244 goto done;
245 }
246
247 conn = sco_conn_add(hcon);
248 if (!conn) {
249 hci_conn_drop(hcon);
250 err = -ENOMEM;
251 goto done;
252 }
253
254 /* Update source addr of the socket */
255 bacpy(&sco_pi(sk)->src, &hcon->src);
256
257 err = sco_chan_add(conn, sk, NULL);
258 if (err)
259 goto done;
260
261 if (hcon->state == BT_CONNECTED) {
262 sco_sock_clear_timer(sk);
263 sk->sk_state = BT_CONNECTED;
264 } else {
265 sk->sk_state = BT_CONNECT;
266 sco_sock_set_timer(sk, sk->sk_sndtimeo);
267 }
268
269done:
270 hci_dev_unlock(hdev);
271 hci_dev_put(hdev);
272 return err;
273}
274
275static int sco_send_frame(struct sock *sk, struct msghdr *msg, int len)
276{
277 struct sco_conn *conn = sco_pi(sk)->conn;
278 struct sk_buff *skb;
279 int err;
280
281 /* Check outgoing MTU */
282 if (len > conn->mtu)
283 return -EINVAL;
284
285 BT_DBG("sk %p len %d", sk, len);
286
287 skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
288 if (!skb)
289 return err;
290
291 if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
292 kfree_skb(skb);
293 return -EFAULT;
294 }
295
296 hci_send_sco(conn->hcon, skb);
297
298 return len;
299}
300
301static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb)
302{
303 struct sock *sk;
304
305 sco_conn_lock(conn);
306 sk = conn->sk;
307 sco_conn_unlock(conn);
308
309 if (!sk)
310 goto drop;
311
312 BT_DBG("sk %p len %d", sk, skb->len);
313
314 if (sk->sk_state != BT_CONNECTED)
315 goto drop;
316
317 if (!sock_queue_rcv_skb(sk, skb))
318 return;
319
320drop:
321 kfree_skb(skb);
322}
323
324/* -------- Socket interface ---------- */
325static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba)
326{
327 struct sock *sk;
328
329 sk_for_each(sk, &sco_sk_list.head) {
330 if (sk->sk_state != BT_LISTEN)
331 continue;
332
333 if (!bacmp(&sco_pi(sk)->src, ba))
334 return sk;
335 }
336
337 return NULL;
338}
339
340/* Find socket listening on source bdaddr.
341 * Returns closest match.
342 */
343static struct sock *sco_get_sock_listen(bdaddr_t *src)
344{
345 struct sock *sk = NULL, *sk1 = NULL;
346
347 read_lock(&sco_sk_list.lock);
348
349 sk_for_each(sk, &sco_sk_list.head) {
350 if (sk->sk_state != BT_LISTEN)
351 continue;
352
353 /* Exact match. */
354 if (!bacmp(&sco_pi(sk)->src, src))
355 break;
356
357 /* Closest match */
358 if (!bacmp(&sco_pi(sk)->src, BDADDR_ANY))
359 sk1 = sk;
360 }
361
362 read_unlock(&sco_sk_list.lock);
363
364 return sk ? sk : sk1;
365}
366
367static void sco_sock_destruct(struct sock *sk)
368{
369 BT_DBG("sk %p", sk);
370
371 skb_queue_purge(&sk->sk_receive_queue);
372 skb_queue_purge(&sk->sk_write_queue);
373}
374
375static void sco_sock_cleanup_listen(struct sock *parent)
376{
377 struct sock *sk;
378
379 BT_DBG("parent %p", parent);
380
381 /* Close not yet accepted channels */
382 while ((sk = bt_accept_dequeue(parent, NULL))) {
383 sco_sock_close(sk);
384 sco_sock_kill(sk);
385 }
386
387 parent->sk_state = BT_CLOSED;
388 sock_set_flag(parent, SOCK_ZAPPED);
389}
390
391/* Kill socket (only if zapped and orphan)
392 * Must be called on unlocked socket.
393 */
394static void sco_sock_kill(struct sock *sk)
395{
396 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket ||
397 sock_flag(sk, SOCK_DEAD))
398 return;
399
400 BT_DBG("sk %p state %d", sk, sk->sk_state);
401
402 /* Kill poor orphan */
403 bt_sock_unlink(&sco_sk_list, sk);
404 sock_set_flag(sk, SOCK_DEAD);
405 sock_put(sk);
406}
407
408static void __sco_sock_close(struct sock *sk)
409{
410 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
411
412 switch (sk->sk_state) {
413 case BT_LISTEN:
414 sco_sock_cleanup_listen(sk);
415 break;
416
417 case BT_CONNECTED:
418 case BT_CONFIG:
419 if (sco_pi(sk)->conn->hcon) {
420 sk->sk_state = BT_DISCONN;
421 sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT);
422 sco_conn_lock(sco_pi(sk)->conn);
423 hci_conn_drop(sco_pi(sk)->conn->hcon);
424 sco_pi(sk)->conn->hcon = NULL;
425 sco_conn_unlock(sco_pi(sk)->conn);
426 } else
427 sco_chan_del(sk, ECONNRESET);
428 break;
429
430 case BT_CONNECT2:
431 case BT_CONNECT:
432 case BT_DISCONN:
433 sco_chan_del(sk, ECONNRESET);
434 break;
435
436 default:
437 sock_set_flag(sk, SOCK_ZAPPED);
438 break;
439 }
440}
441
442/* Must be called on unlocked socket. */
443static void sco_sock_close(struct sock *sk)
444{
445 sco_sock_clear_timer(sk);
446 lock_sock(sk);
447 __sco_sock_close(sk);
448 release_sock(sk);
449 sco_sock_kill(sk);
450}
451
452static void sco_sock_init(struct sock *sk, struct sock *parent)
453{
454 BT_DBG("sk %p", sk);
455
456 if (parent) {
457 sk->sk_type = parent->sk_type;
458 bt_sk(sk)->flags = bt_sk(parent)->flags;
459 security_sk_clone(parent, sk);
460 }
461}
462
463static struct proto sco_proto = {
464 .name = "SCO",
465 .owner = THIS_MODULE,
466 .obj_size = sizeof(struct sco_pinfo)
467};
468
469static struct sock *sco_sock_alloc(struct net *net, struct socket *sock,
470 int proto, gfp_t prio, int kern)
471{
472 struct sock *sk;
473
474 sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto, kern);
475 if (!sk)
476 return NULL;
477
478 sock_init_data(sock, sk);
479 INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
480
481 sk->sk_destruct = sco_sock_destruct;
482 sk->sk_sndtimeo = SCO_CONN_TIMEOUT;
483
484 sock_reset_flag(sk, SOCK_ZAPPED);
485
486 sk->sk_protocol = proto;
487 sk->sk_state = BT_OPEN;
488
489 sco_pi(sk)->setting = BT_VOICE_CVSD_16BIT;
490
491 timer_setup(&sk->sk_timer, sco_sock_timeout, 0);
492
493 bt_sock_link(&sco_sk_list, sk);
494 return sk;
495}
496
497static int sco_sock_create(struct net *net, struct socket *sock, int protocol,
498 int kern)
499{
500 struct sock *sk;
501
502 BT_DBG("sock %p", sock);
503
504 sock->state = SS_UNCONNECTED;
505
506 if (sock->type != SOCK_SEQPACKET)
507 return -ESOCKTNOSUPPORT;
508
509 sock->ops = &sco_sock_ops;
510
511 sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
512 if (!sk)
513 return -ENOMEM;
514
515 sco_sock_init(sk, NULL);
516 return 0;
517}
518
519static int sco_sock_bind(struct socket *sock, struct sockaddr *addr,
520 int addr_len)
521{
522 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
523 struct sock *sk = sock->sk;
524 int err = 0;
525
526 if (!addr || addr_len < sizeof(struct sockaddr_sco) ||
527 addr->sa_family != AF_BLUETOOTH)
528 return -EINVAL;
529
530 BT_DBG("sk %p %pMR", sk, &sa->sco_bdaddr);
531
532 lock_sock(sk);
533
534 if (sk->sk_state != BT_OPEN) {
535 err = -EBADFD;
536 goto done;
537 }
538
539 if (sk->sk_type != SOCK_SEQPACKET) {
540 err = -EINVAL;
541 goto done;
542 }
543
544 bacpy(&sco_pi(sk)->src, &sa->sco_bdaddr);
545
546 sk->sk_state = BT_BOUND;
547
548done:
549 release_sock(sk);
550 return err;
551}
552
553static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
554{
555 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
556 struct sock *sk = sock->sk;
557 int err;
558
559 BT_DBG("sk %p", sk);
560
561 if (alen < sizeof(struct sockaddr_sco) ||
562 addr->sa_family != AF_BLUETOOTH)
563 return -EINVAL;
564
565 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
566 return -EBADFD;
567
568 if (sk->sk_type != SOCK_SEQPACKET)
569 return -EINVAL;
570
571 lock_sock(sk);
572
573 /* Set destination address and psm */
574 bacpy(&sco_pi(sk)->dst, &sa->sco_bdaddr);
575
576 err = sco_connect(sk);
577 if (err)
578 goto done;
579
580 err = bt_sock_wait_state(sk, BT_CONNECTED,
581 sock_sndtimeo(sk, flags & O_NONBLOCK));
582
583done:
584 release_sock(sk);
585 return err;
586}
587
588static int sco_sock_listen(struct socket *sock, int backlog)
589{
590 struct sock *sk = sock->sk;
591 bdaddr_t *src = &sco_pi(sk)->src;
592 int err = 0;
593
594 BT_DBG("sk %p backlog %d", sk, backlog);
595
596 lock_sock(sk);
597
598 if (sk->sk_state != BT_BOUND) {
599 err = -EBADFD;
600 goto done;
601 }
602
603 if (sk->sk_type != SOCK_SEQPACKET) {
604 err = -EINVAL;
605 goto done;
606 }
607
608 write_lock(&sco_sk_list.lock);
609
610 if (__sco_get_sock_listen_by_addr(src)) {
611 err = -EADDRINUSE;
612 goto unlock;
613 }
614
615 sk->sk_max_ack_backlog = backlog;
616 sk->sk_ack_backlog = 0;
617
618 sk->sk_state = BT_LISTEN;
619
620unlock:
621 write_unlock(&sco_sk_list.lock);
622
623done:
624 release_sock(sk);
625 return err;
626}
627
628static int sco_sock_accept(struct socket *sock, struct socket *newsock,
629 int flags, bool kern)
630{
631 DEFINE_WAIT_FUNC(wait, woken_wake_function);
632 struct sock *sk = sock->sk, *ch;
633 long timeo;
634 int err = 0;
635
636 lock_sock(sk);
637
638 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
639
640 BT_DBG("sk %p timeo %ld", sk, timeo);
641
642 /* Wait for an incoming connection. (wake-one). */
643 add_wait_queue_exclusive(sk_sleep(sk), &wait);
644 while (1) {
645 if (sk->sk_state != BT_LISTEN) {
646 err = -EBADFD;
647 break;
648 }
649
650 ch = bt_accept_dequeue(sk, newsock);
651 if (ch)
652 break;
653
654 if (!timeo) {
655 err = -EAGAIN;
656 break;
657 }
658
659 if (signal_pending(current)) {
660 err = sock_intr_errno(timeo);
661 break;
662 }
663
664 release_sock(sk);
665
666 timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);
667 lock_sock(sk);
668 }
669 remove_wait_queue(sk_sleep(sk), &wait);
670
671 if (err)
672 goto done;
673
674 newsock->state = SS_CONNECTED;
675
676 BT_DBG("new socket %p", ch);
677
678done:
679 release_sock(sk);
680 return err;
681}
682
683static int sco_sock_getname(struct socket *sock, struct sockaddr *addr,
684 int peer)
685{
686 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
687 struct sock *sk = sock->sk;
688
689 BT_DBG("sock %p, sk %p", sock, sk);
690
691 addr->sa_family = AF_BLUETOOTH;
692
693 if (peer)
694 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->dst);
695 else
696 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->src);
697
698 return sizeof(struct sockaddr_sco);
699}
700
701static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg,
702 size_t len)
703{
704 struct sock *sk = sock->sk;
705 int err;
706
707 BT_DBG("sock %p, sk %p", sock, sk);
708
709 err = sock_error(sk);
710 if (err)
711 return err;
712
713 if (msg->msg_flags & MSG_OOB)
714 return -EOPNOTSUPP;
715
716 lock_sock(sk);
717
718 if (sk->sk_state == BT_CONNECTED)
719 err = sco_send_frame(sk, msg, len);
720 else
721 err = -ENOTCONN;
722
723 release_sock(sk);
724 return err;
725}
726
727static void sco_conn_defer_accept(struct hci_conn *conn, u16 setting)
728{
729 struct hci_dev *hdev = conn->hdev;
730
731 BT_DBG("conn %p", conn);
732
733 conn->state = BT_CONFIG;
734
735 if (!lmp_esco_capable(hdev)) {
736 struct hci_cp_accept_conn_req cp;
737
738 bacpy(&cp.bdaddr, &conn->dst);
739 cp.role = 0x00; /* Ignored */
740
741 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
742 } else {
743 struct hci_cp_accept_sync_conn_req cp;
744
745 bacpy(&cp.bdaddr, &conn->dst);
746 cp.pkt_type = cpu_to_le16(conn->pkt_type);
747
748 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
749 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
750 cp.content_format = cpu_to_le16(setting);
751
752 switch (setting & SCO_AIRMODE_MASK) {
753 case SCO_AIRMODE_TRANSP:
754 if (conn->pkt_type & ESCO_2EV3)
755 cp.max_latency = cpu_to_le16(0x0008);
756 else
757 cp.max_latency = cpu_to_le16(0x000D);
758 cp.retrans_effort = 0x02;
759 break;
760 case SCO_AIRMODE_CVSD:
761 cp.max_latency = cpu_to_le16(0xffff);
762 cp.retrans_effort = 0xff;
763 break;
764 }
765
766 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ,
767 sizeof(cp), &cp);
768 }
769}
770
771static int sco_sock_recvmsg(struct socket *sock, struct msghdr *msg,
772 size_t len, int flags)
773{
774 struct sock *sk = sock->sk;
775 struct sco_pinfo *pi = sco_pi(sk);
776
777 lock_sock(sk);
778
779 if (sk->sk_state == BT_CONNECT2 &&
780 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
781 sco_conn_defer_accept(pi->conn->hcon, pi->setting);
782 sk->sk_state = BT_CONFIG;
783
784 release_sock(sk);
785 return 0;
786 }
787
788 release_sock(sk);
789
790 return bt_sock_recvmsg(sock, msg, len, flags);
791}
792
793static int sco_sock_setsockopt(struct socket *sock, int level, int optname,
794 char __user *optval, unsigned int optlen)
795{
796 struct sock *sk = sock->sk;
797 int len, err = 0;
798 struct bt_voice voice;
799 u32 opt;
800
801 BT_DBG("sk %p", sk);
802
803 lock_sock(sk);
804
805 switch (optname) {
806
807 case BT_DEFER_SETUP:
808 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
809 err = -EINVAL;
810 break;
811 }
812
813 if (get_user(opt, (u32 __user *) optval)) {
814 err = -EFAULT;
815 break;
816 }
817
818 if (opt)
819 set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
820 else
821 clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
822 break;
823
824 case BT_VOICE:
825 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
826 sk->sk_state != BT_CONNECT2) {
827 err = -EINVAL;
828 break;
829 }
830
831 voice.setting = sco_pi(sk)->setting;
832
833 len = min_t(unsigned int, sizeof(voice), optlen);
834 if (copy_from_user((char *)&voice, optval, len)) {
835 err = -EFAULT;
836 break;
837 }
838
839 /* Explicitly check for these values */
840 if (voice.setting != BT_VOICE_TRANSPARENT &&
841 voice.setting != BT_VOICE_CVSD_16BIT) {
842 err = -EINVAL;
843 break;
844 }
845
846 sco_pi(sk)->setting = voice.setting;
847 break;
848
849 default:
850 err = -ENOPROTOOPT;
851 break;
852 }
853
854 release_sock(sk);
855 return err;
856}
857
858static int sco_sock_getsockopt_old(struct socket *sock, int optname,
859 char __user *optval, int __user *optlen)
860{
861 struct sock *sk = sock->sk;
862 struct sco_options opts;
863 struct sco_conninfo cinfo;
864 int len, err = 0;
865
866 BT_DBG("sk %p", sk);
867
868 if (get_user(len, optlen))
869 return -EFAULT;
870
871 lock_sock(sk);
872
873 switch (optname) {
874 case SCO_OPTIONS:
875 if (sk->sk_state != BT_CONNECTED &&
876 !(sk->sk_state == BT_CONNECT2 &&
877 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
878 err = -ENOTCONN;
879 break;
880 }
881
882 opts.mtu = sco_pi(sk)->conn->mtu;
883
884 BT_DBG("mtu %d", opts.mtu);
885
886 len = min_t(unsigned int, len, sizeof(opts));
887 if (copy_to_user(optval, (char *)&opts, len))
888 err = -EFAULT;
889
890 break;
891
892 case SCO_CONNINFO:
893 if (sk->sk_state != BT_CONNECTED &&
894 !(sk->sk_state == BT_CONNECT2 &&
895 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
896 err = -ENOTCONN;
897 break;
898 }
899
900 memset(&cinfo, 0, sizeof(cinfo));
901 cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle;
902 memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3);
903
904 len = min_t(unsigned int, len, sizeof(cinfo));
905 if (copy_to_user(optval, (char *)&cinfo, len))
906 err = -EFAULT;
907
908 break;
909
910 default:
911 err = -ENOPROTOOPT;
912 break;
913 }
914
915 release_sock(sk);
916 return err;
917}
918
919static int sco_sock_getsockopt(struct socket *sock, int level, int optname,
920 char __user *optval, int __user *optlen)
921{
922 struct sock *sk = sock->sk;
923 int len, err = 0;
924 struct bt_voice voice;
925 u32 phys;
926
927 BT_DBG("sk %p", sk);
928
929 if (level == SOL_SCO)
930 return sco_sock_getsockopt_old(sock, optname, optval, optlen);
931
932 if (get_user(len, optlen))
933 return -EFAULT;
934
935 lock_sock(sk);
936
937 switch (optname) {
938
939 case BT_DEFER_SETUP:
940 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
941 err = -EINVAL;
942 break;
943 }
944
945 if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
946 (u32 __user *)optval))
947 err = -EFAULT;
948
949 break;
950
951 case BT_VOICE:
952 voice.setting = sco_pi(sk)->setting;
953
954 len = min_t(unsigned int, len, sizeof(voice));
955 if (copy_to_user(optval, (char *)&voice, len))
956 err = -EFAULT;
957
958 break;
959
960 case BT_PHY:
961 if (sk->sk_state != BT_CONNECTED) {
962 err = -ENOTCONN;
963 break;
964 }
965
966 phys = hci_conn_get_phy(sco_pi(sk)->conn->hcon);
967
968 if (put_user(phys, (u32 __user *) optval))
969 err = -EFAULT;
970 break;
971
972 default:
973 err = -ENOPROTOOPT;
974 break;
975 }
976
977 release_sock(sk);
978 return err;
979}
980
981static int sco_sock_shutdown(struct socket *sock, int how)
982{
983 struct sock *sk = sock->sk;
984 int err = 0;
985
986 BT_DBG("sock %p, sk %p", sock, sk);
987
988 if (!sk)
989 return 0;
990
991 sock_hold(sk);
992 lock_sock(sk);
993
994 if (!sk->sk_shutdown) {
995 sk->sk_shutdown = SHUTDOWN_MASK;
996 sco_sock_clear_timer(sk);
997 __sco_sock_close(sk);
998
999 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
1000 !(current->flags & PF_EXITING))
1001 err = bt_sock_wait_state(sk, BT_CLOSED,
1002 sk->sk_lingertime);
1003 }
1004
1005 release_sock(sk);
1006 sock_put(sk);
1007
1008 return err;
1009}
1010
1011static int sco_sock_release(struct socket *sock)
1012{
1013 struct sock *sk = sock->sk;
1014 int err = 0;
1015
1016 BT_DBG("sock %p, sk %p", sock, sk);
1017
1018 if (!sk)
1019 return 0;
1020
1021 sco_sock_close(sk);
1022
1023 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
1024 !(current->flags & PF_EXITING)) {
1025 lock_sock(sk);
1026 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
1027 release_sock(sk);
1028 }
1029
1030 sock_orphan(sk);
1031 sco_sock_kill(sk);
1032 return err;
1033}
1034
1035static void sco_conn_ready(struct sco_conn *conn)
1036{
1037 struct sock *parent;
1038 struct sock *sk = conn->sk;
1039
1040 BT_DBG("conn %p", conn);
1041
1042 if (sk) {
1043 sco_sock_clear_timer(sk);
1044 bh_lock_sock(sk);
1045 sk->sk_state = BT_CONNECTED;
1046 sk->sk_state_change(sk);
1047 bh_unlock_sock(sk);
1048 } else {
1049 sco_conn_lock(conn);
1050
1051 if (!conn->hcon) {
1052 sco_conn_unlock(conn);
1053 return;
1054 }
1055
1056 parent = sco_get_sock_listen(&conn->hcon->src);
1057 if (!parent) {
1058 sco_conn_unlock(conn);
1059 return;
1060 }
1061
1062 bh_lock_sock(parent);
1063
1064 sk = sco_sock_alloc(sock_net(parent), NULL,
1065 BTPROTO_SCO, GFP_ATOMIC, 0);
1066 if (!sk) {
1067 bh_unlock_sock(parent);
1068 sco_conn_unlock(conn);
1069 return;
1070 }
1071
1072 sco_sock_init(sk, parent);
1073
1074 bacpy(&sco_pi(sk)->src, &conn->hcon->src);
1075 bacpy(&sco_pi(sk)->dst, &conn->hcon->dst);
1076
1077 hci_conn_hold(conn->hcon);
1078 __sco_chan_add(conn, sk, parent);
1079
1080 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags))
1081 sk->sk_state = BT_CONNECT2;
1082 else
1083 sk->sk_state = BT_CONNECTED;
1084
1085 /* Wake up parent */
1086 parent->sk_data_ready(parent);
1087
1088 bh_unlock_sock(parent);
1089
1090 sco_conn_unlock(conn);
1091 }
1092}
1093
1094/* ----- SCO interface with lower layer (HCI) ----- */
1095int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
1096{
1097 struct sock *sk;
1098 int lm = 0;
1099
1100 BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr);
1101
1102 /* Find listening sockets */
1103 read_lock(&sco_sk_list.lock);
1104 sk_for_each(sk, &sco_sk_list.head) {
1105 if (sk->sk_state != BT_LISTEN)
1106 continue;
1107
1108 if (!bacmp(&sco_pi(sk)->src, &hdev->bdaddr) ||
1109 !bacmp(&sco_pi(sk)->src, BDADDR_ANY)) {
1110 lm |= HCI_LM_ACCEPT;
1111
1112 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))
1113 *flags |= HCI_PROTO_DEFER;
1114 break;
1115 }
1116 }
1117 read_unlock(&sco_sk_list.lock);
1118
1119 return lm;
1120}
1121
1122static void sco_connect_cfm(struct hci_conn *hcon, __u8 status)
1123{
1124 if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
1125 return;
1126
1127 BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status);
1128
1129 if (!status) {
1130 struct sco_conn *conn;
1131
1132 conn = sco_conn_add(hcon);
1133 if (conn)
1134 sco_conn_ready(conn);
1135 } else
1136 sco_conn_del(hcon, bt_to_errno(status));
1137}
1138
1139static void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason)
1140{
1141 if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
1142 return;
1143
1144 BT_DBG("hcon %p reason %d", hcon, reason);
1145
1146 sco_conn_del(hcon, bt_to_errno(reason));
1147}
1148
1149void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
1150{
1151 struct sco_conn *conn = hcon->sco_data;
1152
1153 if (!conn)
1154 goto drop;
1155
1156 BT_DBG("conn %p len %d", conn, skb->len);
1157
1158 if (skb->len) {
1159 sco_recv_frame(conn, skb);
1160 return;
1161 }
1162
1163drop:
1164 kfree_skb(skb);
1165}
1166
1167static struct hci_cb sco_cb = {
1168 .name = "SCO",
1169 .connect_cfm = sco_connect_cfm,
1170 .disconn_cfm = sco_disconn_cfm,
1171};
1172
1173static int sco_debugfs_show(struct seq_file *f, void *p)
1174{
1175 struct sock *sk;
1176
1177 read_lock(&sco_sk_list.lock);
1178
1179 sk_for_each(sk, &sco_sk_list.head) {
1180 seq_printf(f, "%pMR %pMR %d\n", &sco_pi(sk)->src,
1181 &sco_pi(sk)->dst, sk->sk_state);
1182 }
1183
1184 read_unlock(&sco_sk_list.lock);
1185
1186 return 0;
1187}
1188
1189DEFINE_SHOW_ATTRIBUTE(sco_debugfs);
1190
1191static struct dentry *sco_debugfs;
1192
1193static const struct proto_ops sco_sock_ops = {
1194 .family = PF_BLUETOOTH,
1195 .owner = THIS_MODULE,
1196 .release = sco_sock_release,
1197 .bind = sco_sock_bind,
1198 .connect = sco_sock_connect,
1199 .listen = sco_sock_listen,
1200 .accept = sco_sock_accept,
1201 .getname = sco_sock_getname,
1202 .sendmsg = sco_sock_sendmsg,
1203 .recvmsg = sco_sock_recvmsg,
1204 .poll = bt_sock_poll,
1205 .ioctl = bt_sock_ioctl,
1206 .gettstamp = sock_gettstamp,
1207 .mmap = sock_no_mmap,
1208 .socketpair = sock_no_socketpair,
1209 .shutdown = sco_sock_shutdown,
1210 .setsockopt = sco_sock_setsockopt,
1211 .getsockopt = sco_sock_getsockopt
1212};
1213
1214static const struct net_proto_family sco_sock_family_ops = {
1215 .family = PF_BLUETOOTH,
1216 .owner = THIS_MODULE,
1217 .create = sco_sock_create,
1218};
1219
1220int __init sco_init(void)
1221{
1222 int err;
1223
1224 BUILD_BUG_ON(sizeof(struct sockaddr_sco) > sizeof(struct sockaddr));
1225
1226 err = proto_register(&sco_proto, 0);
1227 if (err < 0)
1228 return err;
1229
1230 err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops);
1231 if (err < 0) {
1232 BT_ERR("SCO socket registration failed");
1233 goto error;
1234 }
1235
1236 err = bt_procfs_init(&init_net, "sco", &sco_sk_list, NULL);
1237 if (err < 0) {
1238 BT_ERR("Failed to create SCO proc file");
1239 bt_sock_unregister(BTPROTO_SCO);
1240 goto error;
1241 }
1242
1243 BT_INFO("SCO socket layer initialized");
1244
1245 hci_register_cb(&sco_cb);
1246
1247 if (IS_ERR_OR_NULL(bt_debugfs))
1248 return 0;
1249
1250 sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs,
1251 NULL, &sco_debugfs_fops);
1252
1253 return 0;
1254
1255error:
1256 proto_unregister(&sco_proto);
1257 return err;
1258}
1259
1260void sco_exit(void)
1261{
1262 bt_procfs_cleanup(&init_net, "sco");
1263
1264 debugfs_remove(sco_debugfs);
1265
1266 hci_unregister_cb(&sco_cb);
1267
1268 bt_sock_unregister(BTPROTO_SCO);
1269
1270 proto_unregister(&sco_proto);
1271}
1272
1273module_param(disable_esco, bool, 0644);
1274MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation");