Loading...
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 struct delayed_work timeout_work;
52
53 unsigned int mtu;
54};
55
56#define sco_conn_lock(c) spin_lock(&c->lock)
57#define sco_conn_unlock(c) spin_unlock(&c->lock)
58
59static void sco_sock_close(struct sock *sk);
60static void sco_sock_kill(struct sock *sk);
61
62/* ----- SCO socket info ----- */
63#define sco_pi(sk) ((struct sco_pinfo *) sk)
64
65struct sco_pinfo {
66 struct bt_sock bt;
67 bdaddr_t src;
68 bdaddr_t dst;
69 __u32 flags;
70 __u16 setting;
71 struct bt_codec codec;
72 struct sco_conn *conn;
73};
74
75/* ---- SCO timers ---- */
76#define SCO_CONN_TIMEOUT (HZ * 40)
77#define SCO_DISCONN_TIMEOUT (HZ * 2)
78
79static void sco_sock_timeout(struct work_struct *work)
80{
81 struct sco_conn *conn = container_of(work, struct sco_conn,
82 timeout_work.work);
83 struct sock *sk;
84
85 sco_conn_lock(conn);
86 sk = conn->sk;
87 if (sk)
88 sock_hold(sk);
89 sco_conn_unlock(conn);
90
91 if (!sk)
92 return;
93
94 BT_DBG("sock %p state %d", sk, sk->sk_state);
95
96 lock_sock(sk);
97 sk->sk_err = ETIMEDOUT;
98 sk->sk_state_change(sk);
99 release_sock(sk);
100 sock_put(sk);
101}
102
103static void sco_sock_set_timer(struct sock *sk, long timeout)
104{
105 if (!sco_pi(sk)->conn)
106 return;
107
108 BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
109 cancel_delayed_work(&sco_pi(sk)->conn->timeout_work);
110 schedule_delayed_work(&sco_pi(sk)->conn->timeout_work, timeout);
111}
112
113static void sco_sock_clear_timer(struct sock *sk)
114{
115 if (!sco_pi(sk)->conn)
116 return;
117
118 BT_DBG("sock %p state %d", sk, sk->sk_state);
119 cancel_delayed_work(&sco_pi(sk)->conn->timeout_work);
120}
121
122/* ---- SCO connections ---- */
123static struct sco_conn *sco_conn_add(struct hci_conn *hcon)
124{
125 struct hci_dev *hdev = hcon->hdev;
126 struct sco_conn *conn = hcon->sco_data;
127
128 if (conn) {
129 if (!conn->hcon)
130 conn->hcon = hcon;
131 return conn;
132 }
133
134 conn = kzalloc(sizeof(struct sco_conn), GFP_KERNEL);
135 if (!conn)
136 return NULL;
137
138 spin_lock_init(&conn->lock);
139 INIT_DELAYED_WORK(&conn->timeout_work, sco_sock_timeout);
140
141 hcon->sco_data = conn;
142 conn->hcon = hcon;
143
144 if (hdev->sco_mtu > 0)
145 conn->mtu = hdev->sco_mtu;
146 else
147 conn->mtu = 60;
148
149 BT_DBG("hcon %p conn %p", hcon, conn);
150
151 return conn;
152}
153
154/* Delete channel.
155 * Must be called on the locked socket. */
156static void sco_chan_del(struct sock *sk, int err)
157{
158 struct sco_conn *conn;
159
160 conn = sco_pi(sk)->conn;
161
162 BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
163
164 if (conn) {
165 sco_conn_lock(conn);
166 conn->sk = NULL;
167 sco_pi(sk)->conn = NULL;
168 sco_conn_unlock(conn);
169
170 if (conn->hcon)
171 hci_conn_drop(conn->hcon);
172 }
173
174 sk->sk_state = BT_CLOSED;
175 sk->sk_err = err;
176 sk->sk_state_change(sk);
177
178 sock_set_flag(sk, SOCK_ZAPPED);
179}
180
181static void sco_conn_del(struct hci_conn *hcon, int err)
182{
183 struct sco_conn *conn = hcon->sco_data;
184 struct sock *sk;
185
186 if (!conn)
187 return;
188
189 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
190
191 /* Kill socket */
192 sco_conn_lock(conn);
193 sk = conn->sk;
194 if (sk)
195 sock_hold(sk);
196 sco_conn_unlock(conn);
197
198 if (sk) {
199 lock_sock(sk);
200 sco_sock_clear_timer(sk);
201 sco_chan_del(sk, err);
202 release_sock(sk);
203 sock_put(sk);
204 }
205
206 /* Ensure no more work items will run before freeing conn. */
207 cancel_delayed_work_sync(&conn->timeout_work);
208
209 hcon->sco_data = NULL;
210 kfree(conn);
211}
212
213static void __sco_chan_add(struct sco_conn *conn, struct sock *sk,
214 struct sock *parent)
215{
216 BT_DBG("conn %p", conn);
217
218 sco_pi(sk)->conn = conn;
219 conn->sk = sk;
220
221 if (parent)
222 bt_accept_enqueue(parent, sk, true);
223}
224
225static int sco_chan_add(struct sco_conn *conn, struct sock *sk,
226 struct sock *parent)
227{
228 int err = 0;
229
230 sco_conn_lock(conn);
231 if (conn->sk)
232 err = -EBUSY;
233 else
234 __sco_chan_add(conn, sk, parent);
235
236 sco_conn_unlock(conn);
237 return err;
238}
239
240static int sco_connect(struct sock *sk)
241{
242 struct sco_conn *conn;
243 struct hci_conn *hcon;
244 struct hci_dev *hdev;
245 int err, type;
246
247 BT_DBG("%pMR -> %pMR", &sco_pi(sk)->src, &sco_pi(sk)->dst);
248
249 hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src, BDADDR_BREDR);
250 if (!hdev)
251 return -EHOSTUNREACH;
252
253 hci_dev_lock(hdev);
254
255 if (lmp_esco_capable(hdev) && !disable_esco)
256 type = ESCO_LINK;
257 else
258 type = SCO_LINK;
259
260 if (sco_pi(sk)->setting == BT_VOICE_TRANSPARENT &&
261 (!lmp_transp_capable(hdev) || !lmp_esco_capable(hdev))) {
262 err = -EOPNOTSUPP;
263 goto unlock;
264 }
265
266 hcon = hci_connect_sco(hdev, type, &sco_pi(sk)->dst,
267 sco_pi(sk)->setting, &sco_pi(sk)->codec);
268 if (IS_ERR(hcon)) {
269 err = PTR_ERR(hcon);
270 goto unlock;
271 }
272
273 conn = sco_conn_add(hcon);
274 if (!conn) {
275 hci_conn_drop(hcon);
276 err = -ENOMEM;
277 goto unlock;
278 }
279
280 lock_sock(sk);
281
282 err = sco_chan_add(conn, sk, NULL);
283 if (err) {
284 release_sock(sk);
285 goto unlock;
286 }
287
288 /* Update source addr of the socket */
289 bacpy(&sco_pi(sk)->src, &hcon->src);
290
291 if (hcon->state == BT_CONNECTED) {
292 sco_sock_clear_timer(sk);
293 sk->sk_state = BT_CONNECTED;
294 } else {
295 sk->sk_state = BT_CONNECT;
296 sco_sock_set_timer(sk, sk->sk_sndtimeo);
297 }
298
299 release_sock(sk);
300
301unlock:
302 hci_dev_unlock(hdev);
303 hci_dev_put(hdev);
304 return err;
305}
306
307static int sco_send_frame(struct sock *sk, struct sk_buff *skb)
308{
309 struct sco_conn *conn = sco_pi(sk)->conn;
310 int len = skb->len;
311
312 /* Check outgoing MTU */
313 if (len > conn->mtu)
314 return -EINVAL;
315
316 BT_DBG("sk %p len %d", sk, len);
317
318 hci_send_sco(conn->hcon, skb);
319
320 return len;
321}
322
323static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb)
324{
325 struct sock *sk;
326
327 sco_conn_lock(conn);
328 sk = conn->sk;
329 sco_conn_unlock(conn);
330
331 if (!sk)
332 goto drop;
333
334 BT_DBG("sk %p len %u", sk, skb->len);
335
336 if (sk->sk_state != BT_CONNECTED)
337 goto drop;
338
339 if (!sock_queue_rcv_skb(sk, skb))
340 return;
341
342drop:
343 kfree_skb(skb);
344}
345
346/* -------- Socket interface ---------- */
347static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba)
348{
349 struct sock *sk;
350
351 sk_for_each(sk, &sco_sk_list.head) {
352 if (sk->sk_state != BT_LISTEN)
353 continue;
354
355 if (!bacmp(&sco_pi(sk)->src, ba))
356 return sk;
357 }
358
359 return NULL;
360}
361
362/* Find socket listening on source bdaddr.
363 * Returns closest match.
364 */
365static struct sock *sco_get_sock_listen(bdaddr_t *src)
366{
367 struct sock *sk = NULL, *sk1 = NULL;
368
369 read_lock(&sco_sk_list.lock);
370
371 sk_for_each(sk, &sco_sk_list.head) {
372 if (sk->sk_state != BT_LISTEN)
373 continue;
374
375 /* Exact match. */
376 if (!bacmp(&sco_pi(sk)->src, src))
377 break;
378
379 /* Closest match */
380 if (!bacmp(&sco_pi(sk)->src, BDADDR_ANY))
381 sk1 = sk;
382 }
383
384 read_unlock(&sco_sk_list.lock);
385
386 return sk ? sk : sk1;
387}
388
389static void sco_sock_destruct(struct sock *sk)
390{
391 BT_DBG("sk %p", sk);
392
393 skb_queue_purge(&sk->sk_receive_queue);
394 skb_queue_purge(&sk->sk_write_queue);
395}
396
397static void sco_sock_cleanup_listen(struct sock *parent)
398{
399 struct sock *sk;
400
401 BT_DBG("parent %p", parent);
402
403 /* Close not yet accepted channels */
404 while ((sk = bt_accept_dequeue(parent, NULL))) {
405 sco_sock_close(sk);
406 sco_sock_kill(sk);
407 }
408
409 parent->sk_state = BT_CLOSED;
410 sock_set_flag(parent, SOCK_ZAPPED);
411}
412
413/* Kill socket (only if zapped and orphan)
414 * Must be called on unlocked socket.
415 */
416static void sco_sock_kill(struct sock *sk)
417{
418 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
419 return;
420
421 BT_DBG("sk %p state %d", sk, sk->sk_state);
422
423 /* Kill poor orphan */
424 bt_sock_unlink(&sco_sk_list, sk);
425 sock_set_flag(sk, SOCK_DEAD);
426 sock_put(sk);
427}
428
429static void __sco_sock_close(struct sock *sk)
430{
431 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
432
433 switch (sk->sk_state) {
434 case BT_LISTEN:
435 sco_sock_cleanup_listen(sk);
436 break;
437
438 case BT_CONNECTED:
439 case BT_CONFIG:
440 if (sco_pi(sk)->conn->hcon) {
441 sk->sk_state = BT_DISCONN;
442 sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT);
443 sco_conn_lock(sco_pi(sk)->conn);
444 hci_conn_drop(sco_pi(sk)->conn->hcon);
445 sco_pi(sk)->conn->hcon = NULL;
446 sco_conn_unlock(sco_pi(sk)->conn);
447 } else
448 sco_chan_del(sk, ECONNRESET);
449 break;
450
451 case BT_CONNECT2:
452 case BT_CONNECT:
453 case BT_DISCONN:
454 sco_chan_del(sk, ECONNRESET);
455 break;
456
457 default:
458 sock_set_flag(sk, SOCK_ZAPPED);
459 break;
460 }
461
462}
463
464/* Must be called on unlocked socket. */
465static void sco_sock_close(struct sock *sk)
466{
467 lock_sock(sk);
468 sco_sock_clear_timer(sk);
469 __sco_sock_close(sk);
470 release_sock(sk);
471}
472
473static void sco_sock_init(struct sock *sk, struct sock *parent)
474{
475 BT_DBG("sk %p", sk);
476
477 if (parent) {
478 sk->sk_type = parent->sk_type;
479 bt_sk(sk)->flags = bt_sk(parent)->flags;
480 security_sk_clone(parent, sk);
481 }
482}
483
484static struct proto sco_proto = {
485 .name = "SCO",
486 .owner = THIS_MODULE,
487 .obj_size = sizeof(struct sco_pinfo)
488};
489
490static struct sock *sco_sock_alloc(struct net *net, struct socket *sock,
491 int proto, gfp_t prio, int kern)
492{
493 struct sock *sk;
494
495 sk = bt_sock_alloc(net, sock, &sco_proto, proto, prio, kern);
496 if (!sk)
497 return NULL;
498
499 sk->sk_destruct = sco_sock_destruct;
500 sk->sk_sndtimeo = SCO_CONN_TIMEOUT;
501
502 sco_pi(sk)->setting = BT_VOICE_CVSD_16BIT;
503 sco_pi(sk)->codec.id = BT_CODEC_CVSD;
504 sco_pi(sk)->codec.cid = 0xffff;
505 sco_pi(sk)->codec.vid = 0xffff;
506 sco_pi(sk)->codec.data_path = 0x00;
507
508 bt_sock_link(&sco_sk_list, sk);
509 return sk;
510}
511
512static int sco_sock_create(struct net *net, struct socket *sock, int protocol,
513 int kern)
514{
515 struct sock *sk;
516
517 BT_DBG("sock %p", sock);
518
519 sock->state = SS_UNCONNECTED;
520
521 if (sock->type != SOCK_SEQPACKET)
522 return -ESOCKTNOSUPPORT;
523
524 sock->ops = &sco_sock_ops;
525
526 sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
527 if (!sk)
528 return -ENOMEM;
529
530 sco_sock_init(sk, NULL);
531 return 0;
532}
533
534static int sco_sock_bind(struct socket *sock, struct sockaddr *addr,
535 int addr_len)
536{
537 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
538 struct sock *sk = sock->sk;
539 int err = 0;
540
541 if (!addr || addr_len < sizeof(struct sockaddr_sco) ||
542 addr->sa_family != AF_BLUETOOTH)
543 return -EINVAL;
544
545 BT_DBG("sk %p %pMR", sk, &sa->sco_bdaddr);
546
547 lock_sock(sk);
548
549 if (sk->sk_state != BT_OPEN) {
550 err = -EBADFD;
551 goto done;
552 }
553
554 if (sk->sk_type != SOCK_SEQPACKET) {
555 err = -EINVAL;
556 goto done;
557 }
558
559 bacpy(&sco_pi(sk)->src, &sa->sco_bdaddr);
560
561 sk->sk_state = BT_BOUND;
562
563done:
564 release_sock(sk);
565 return err;
566}
567
568static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
569{
570 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
571 struct sock *sk = sock->sk;
572 int err;
573
574 BT_DBG("sk %p", sk);
575
576 if (alen < sizeof(struct sockaddr_sco) ||
577 addr->sa_family != AF_BLUETOOTH)
578 return -EINVAL;
579
580 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
581 return -EBADFD;
582
583 if (sk->sk_type != SOCK_SEQPACKET)
584 err = -EINVAL;
585
586 lock_sock(sk);
587 /* Set destination address and psm */
588 bacpy(&sco_pi(sk)->dst, &sa->sco_bdaddr);
589 release_sock(sk);
590
591 err = sco_connect(sk);
592 if (err)
593 return err;
594
595 lock_sock(sk);
596
597 err = bt_sock_wait_state(sk, BT_CONNECTED,
598 sock_sndtimeo(sk, flags & O_NONBLOCK));
599
600 release_sock(sk);
601 return err;
602}
603
604static int sco_sock_listen(struct socket *sock, int backlog)
605{
606 struct sock *sk = sock->sk;
607 bdaddr_t *src = &sco_pi(sk)->src;
608 int err = 0;
609
610 BT_DBG("sk %p backlog %d", sk, backlog);
611
612 lock_sock(sk);
613
614 if (sk->sk_state != BT_BOUND) {
615 err = -EBADFD;
616 goto done;
617 }
618
619 if (sk->sk_type != SOCK_SEQPACKET) {
620 err = -EINVAL;
621 goto done;
622 }
623
624 write_lock(&sco_sk_list.lock);
625
626 if (__sco_get_sock_listen_by_addr(src)) {
627 err = -EADDRINUSE;
628 goto unlock;
629 }
630
631 sk->sk_max_ack_backlog = backlog;
632 sk->sk_ack_backlog = 0;
633
634 sk->sk_state = BT_LISTEN;
635
636unlock:
637 write_unlock(&sco_sk_list.lock);
638
639done:
640 release_sock(sk);
641 return err;
642}
643
644static int sco_sock_accept(struct socket *sock, struct socket *newsock,
645 int flags, bool kern)
646{
647 DEFINE_WAIT_FUNC(wait, woken_wake_function);
648 struct sock *sk = sock->sk, *ch;
649 long timeo;
650 int err = 0;
651
652 lock_sock(sk);
653
654 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
655
656 BT_DBG("sk %p timeo %ld", sk, timeo);
657
658 /* Wait for an incoming connection. (wake-one). */
659 add_wait_queue_exclusive(sk_sleep(sk), &wait);
660 while (1) {
661 if (sk->sk_state != BT_LISTEN) {
662 err = -EBADFD;
663 break;
664 }
665
666 ch = bt_accept_dequeue(sk, newsock);
667 if (ch)
668 break;
669
670 if (!timeo) {
671 err = -EAGAIN;
672 break;
673 }
674
675 if (signal_pending(current)) {
676 err = sock_intr_errno(timeo);
677 break;
678 }
679
680 release_sock(sk);
681
682 timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);
683 lock_sock(sk);
684 }
685 remove_wait_queue(sk_sleep(sk), &wait);
686
687 if (err)
688 goto done;
689
690 newsock->state = SS_CONNECTED;
691
692 BT_DBG("new socket %p", ch);
693
694done:
695 release_sock(sk);
696 return err;
697}
698
699static int sco_sock_getname(struct socket *sock, struct sockaddr *addr,
700 int peer)
701{
702 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
703 struct sock *sk = sock->sk;
704
705 BT_DBG("sock %p, sk %p", sock, sk);
706
707 addr->sa_family = AF_BLUETOOTH;
708
709 if (peer)
710 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->dst);
711 else
712 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->src);
713
714 return sizeof(struct sockaddr_sco);
715}
716
717static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg,
718 size_t len)
719{
720 struct sock *sk = sock->sk;
721 struct sk_buff *skb;
722 int err;
723
724 BT_DBG("sock %p, sk %p", sock, sk);
725
726 err = sock_error(sk);
727 if (err)
728 return err;
729
730 if (msg->msg_flags & MSG_OOB)
731 return -EOPNOTSUPP;
732
733 skb = bt_skb_sendmsg(sk, msg, len, len, 0, 0);
734 if (IS_ERR(skb))
735 return PTR_ERR(skb);
736
737 lock_sock(sk);
738
739 if (sk->sk_state == BT_CONNECTED)
740 err = sco_send_frame(sk, skb);
741 else
742 err = -ENOTCONN;
743
744 release_sock(sk);
745
746 if (err < 0)
747 kfree_skb(skb);
748 return err;
749}
750
751static void sco_conn_defer_accept(struct hci_conn *conn, u16 setting)
752{
753 struct hci_dev *hdev = conn->hdev;
754
755 BT_DBG("conn %p", conn);
756
757 conn->state = BT_CONFIG;
758
759 if (!lmp_esco_capable(hdev)) {
760 struct hci_cp_accept_conn_req cp;
761
762 bacpy(&cp.bdaddr, &conn->dst);
763 cp.role = 0x00; /* Ignored */
764
765 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
766 } else {
767 struct hci_cp_accept_sync_conn_req cp;
768
769 bacpy(&cp.bdaddr, &conn->dst);
770 cp.pkt_type = cpu_to_le16(conn->pkt_type);
771
772 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
773 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
774 cp.content_format = cpu_to_le16(setting);
775
776 switch (setting & SCO_AIRMODE_MASK) {
777 case SCO_AIRMODE_TRANSP:
778 if (conn->pkt_type & ESCO_2EV3)
779 cp.max_latency = cpu_to_le16(0x0008);
780 else
781 cp.max_latency = cpu_to_le16(0x000D);
782 cp.retrans_effort = 0x02;
783 break;
784 case SCO_AIRMODE_CVSD:
785 cp.max_latency = cpu_to_le16(0xffff);
786 cp.retrans_effort = 0xff;
787 break;
788 default:
789 /* use CVSD settings as fallback */
790 cp.max_latency = cpu_to_le16(0xffff);
791 cp.retrans_effort = 0xff;
792 break;
793 }
794
795 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ,
796 sizeof(cp), &cp);
797 }
798}
799
800static int sco_sock_recvmsg(struct socket *sock, struct msghdr *msg,
801 size_t len, int flags)
802{
803 struct sock *sk = sock->sk;
804 struct sco_pinfo *pi = sco_pi(sk);
805
806 lock_sock(sk);
807
808 if (sk->sk_state == BT_CONNECT2 &&
809 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
810 sco_conn_defer_accept(pi->conn->hcon, pi->setting);
811 sk->sk_state = BT_CONFIG;
812
813 release_sock(sk);
814 return 0;
815 }
816
817 release_sock(sk);
818
819 return bt_sock_recvmsg(sock, msg, len, flags);
820}
821
822static int sco_sock_setsockopt(struct socket *sock, int level, int optname,
823 sockptr_t optval, unsigned int optlen)
824{
825 struct sock *sk = sock->sk;
826 int len, err = 0;
827 struct bt_voice voice;
828 u32 opt;
829 struct bt_codecs *codecs;
830 struct hci_dev *hdev;
831 __u8 buffer[255];
832
833 BT_DBG("sk %p", sk);
834
835 lock_sock(sk);
836
837 switch (optname) {
838
839 case BT_DEFER_SETUP:
840 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
841 err = -EINVAL;
842 break;
843 }
844
845 if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
846 err = -EFAULT;
847 break;
848 }
849
850 if (opt)
851 set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
852 else
853 clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
854 break;
855
856 case BT_VOICE:
857 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
858 sk->sk_state != BT_CONNECT2) {
859 err = -EINVAL;
860 break;
861 }
862
863 voice.setting = sco_pi(sk)->setting;
864
865 len = min_t(unsigned int, sizeof(voice), optlen);
866 if (copy_from_sockptr(&voice, optval, len)) {
867 err = -EFAULT;
868 break;
869 }
870
871 /* Explicitly check for these values */
872 if (voice.setting != BT_VOICE_TRANSPARENT &&
873 voice.setting != BT_VOICE_CVSD_16BIT) {
874 err = -EINVAL;
875 break;
876 }
877
878 sco_pi(sk)->setting = voice.setting;
879 hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src,
880 BDADDR_BREDR);
881 if (!hdev) {
882 err = -EBADFD;
883 break;
884 }
885 if (enhanced_sync_conn_capable(hdev) &&
886 voice.setting == BT_VOICE_TRANSPARENT)
887 sco_pi(sk)->codec.id = BT_CODEC_TRANSPARENT;
888 hci_dev_put(hdev);
889 break;
890
891 case BT_PKT_STATUS:
892 if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
893 err = -EFAULT;
894 break;
895 }
896
897 if (opt)
898 set_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags);
899 else
900 clear_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags);
901 break;
902
903 case BT_CODEC:
904 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
905 sk->sk_state != BT_CONNECT2) {
906 err = -EINVAL;
907 break;
908 }
909
910 hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src,
911 BDADDR_BREDR);
912 if (!hdev) {
913 err = -EBADFD;
914 break;
915 }
916
917 if (!hci_dev_test_flag(hdev, HCI_OFFLOAD_CODECS_ENABLED)) {
918 hci_dev_put(hdev);
919 err = -EOPNOTSUPP;
920 break;
921 }
922
923 if (!hdev->get_data_path_id) {
924 hci_dev_put(hdev);
925 err = -EOPNOTSUPP;
926 break;
927 }
928
929 if (optlen < sizeof(struct bt_codecs) ||
930 optlen > sizeof(buffer)) {
931 hci_dev_put(hdev);
932 err = -EINVAL;
933 break;
934 }
935
936 if (copy_from_sockptr(buffer, optval, optlen)) {
937 hci_dev_put(hdev);
938 err = -EFAULT;
939 break;
940 }
941
942 codecs = (void *)buffer;
943
944 if (codecs->num_codecs > 1) {
945 hci_dev_put(hdev);
946 err = -EINVAL;
947 break;
948 }
949
950 sco_pi(sk)->codec = codecs->codecs[0];
951 hci_dev_put(hdev);
952 break;
953
954 default:
955 err = -ENOPROTOOPT;
956 break;
957 }
958
959 release_sock(sk);
960 return err;
961}
962
963static int sco_sock_getsockopt_old(struct socket *sock, int optname,
964 char __user *optval, int __user *optlen)
965{
966 struct sock *sk = sock->sk;
967 struct sco_options opts;
968 struct sco_conninfo cinfo;
969 int len, err = 0;
970
971 BT_DBG("sk %p", sk);
972
973 if (get_user(len, optlen))
974 return -EFAULT;
975
976 lock_sock(sk);
977
978 switch (optname) {
979 case SCO_OPTIONS:
980 if (sk->sk_state != BT_CONNECTED &&
981 !(sk->sk_state == BT_CONNECT2 &&
982 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
983 err = -ENOTCONN;
984 break;
985 }
986
987 opts.mtu = sco_pi(sk)->conn->mtu;
988
989 BT_DBG("mtu %u", opts.mtu);
990
991 len = min_t(unsigned int, len, sizeof(opts));
992 if (copy_to_user(optval, (char *)&opts, len))
993 err = -EFAULT;
994
995 break;
996
997 case SCO_CONNINFO:
998 if (sk->sk_state != BT_CONNECTED &&
999 !(sk->sk_state == BT_CONNECT2 &&
1000 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
1001 err = -ENOTCONN;
1002 break;
1003 }
1004
1005 memset(&cinfo, 0, sizeof(cinfo));
1006 cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle;
1007 memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3);
1008
1009 len = min_t(unsigned int, len, sizeof(cinfo));
1010 if (copy_to_user(optval, (char *)&cinfo, len))
1011 err = -EFAULT;
1012
1013 break;
1014
1015 default:
1016 err = -ENOPROTOOPT;
1017 break;
1018 }
1019
1020 release_sock(sk);
1021 return err;
1022}
1023
1024static int sco_sock_getsockopt(struct socket *sock, int level, int optname,
1025 char __user *optval, int __user *optlen)
1026{
1027 struct sock *sk = sock->sk;
1028 int len, err = 0;
1029 struct bt_voice voice;
1030 u32 phys;
1031 int buf_len;
1032 struct codec_list *c;
1033 u8 num_codecs, i, __user *ptr;
1034 struct hci_dev *hdev;
1035 struct hci_codec_caps *caps;
1036 struct bt_codec codec;
1037
1038 BT_DBG("sk %p", sk);
1039
1040 if (level == SOL_SCO)
1041 return sco_sock_getsockopt_old(sock, optname, optval, optlen);
1042
1043 if (get_user(len, optlen))
1044 return -EFAULT;
1045
1046 lock_sock(sk);
1047
1048 switch (optname) {
1049
1050 case BT_DEFER_SETUP:
1051 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
1052 err = -EINVAL;
1053 break;
1054 }
1055
1056 if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
1057 (u32 __user *)optval))
1058 err = -EFAULT;
1059
1060 break;
1061
1062 case BT_VOICE:
1063 voice.setting = sco_pi(sk)->setting;
1064
1065 len = min_t(unsigned int, len, sizeof(voice));
1066 if (copy_to_user(optval, (char *)&voice, len))
1067 err = -EFAULT;
1068
1069 break;
1070
1071 case BT_PHY:
1072 if (sk->sk_state != BT_CONNECTED) {
1073 err = -ENOTCONN;
1074 break;
1075 }
1076
1077 phys = hci_conn_get_phy(sco_pi(sk)->conn->hcon);
1078
1079 if (put_user(phys, (u32 __user *) optval))
1080 err = -EFAULT;
1081 break;
1082
1083 case BT_PKT_STATUS:
1084 if (put_user(test_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags),
1085 (int __user *)optval))
1086 err = -EFAULT;
1087 break;
1088
1089 case BT_SNDMTU:
1090 case BT_RCVMTU:
1091 if (sk->sk_state != BT_CONNECTED) {
1092 err = -ENOTCONN;
1093 break;
1094 }
1095
1096 if (put_user(sco_pi(sk)->conn->mtu, (u32 __user *)optval))
1097 err = -EFAULT;
1098 break;
1099
1100 case BT_CODEC:
1101 num_codecs = 0;
1102 buf_len = 0;
1103
1104 hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src, BDADDR_BREDR);
1105 if (!hdev) {
1106 err = -EBADFD;
1107 break;
1108 }
1109
1110 if (!hci_dev_test_flag(hdev, HCI_OFFLOAD_CODECS_ENABLED)) {
1111 hci_dev_put(hdev);
1112 err = -EOPNOTSUPP;
1113 break;
1114 }
1115
1116 if (!hdev->get_data_path_id) {
1117 hci_dev_put(hdev);
1118 err = -EOPNOTSUPP;
1119 break;
1120 }
1121
1122 release_sock(sk);
1123
1124 /* find total buffer size required to copy codec + caps */
1125 hci_dev_lock(hdev);
1126 list_for_each_entry(c, &hdev->local_codecs, list) {
1127 if (c->transport != HCI_TRANSPORT_SCO_ESCO)
1128 continue;
1129 num_codecs++;
1130 for (i = 0, caps = c->caps; i < c->num_caps; i++) {
1131 buf_len += 1 + caps->len;
1132 caps = (void *)&caps->data[caps->len];
1133 }
1134 buf_len += sizeof(struct bt_codec);
1135 }
1136 hci_dev_unlock(hdev);
1137
1138 buf_len += sizeof(struct bt_codecs);
1139 if (buf_len > len) {
1140 hci_dev_put(hdev);
1141 return -ENOBUFS;
1142 }
1143 ptr = optval;
1144
1145 if (put_user(num_codecs, ptr)) {
1146 hci_dev_put(hdev);
1147 return -EFAULT;
1148 }
1149 ptr += sizeof(num_codecs);
1150
1151 /* Iterate all the codecs supported over SCO and populate
1152 * codec data
1153 */
1154 hci_dev_lock(hdev);
1155 list_for_each_entry(c, &hdev->local_codecs, list) {
1156 if (c->transport != HCI_TRANSPORT_SCO_ESCO)
1157 continue;
1158
1159 codec.id = c->id;
1160 codec.cid = c->cid;
1161 codec.vid = c->vid;
1162 err = hdev->get_data_path_id(hdev, &codec.data_path);
1163 if (err < 0)
1164 break;
1165 codec.num_caps = c->num_caps;
1166 if (copy_to_user(ptr, &codec, sizeof(codec))) {
1167 err = -EFAULT;
1168 break;
1169 }
1170 ptr += sizeof(codec);
1171
1172 /* find codec capabilities data length */
1173 len = 0;
1174 for (i = 0, caps = c->caps; i < c->num_caps; i++) {
1175 len += 1 + caps->len;
1176 caps = (void *)&caps->data[caps->len];
1177 }
1178
1179 /* copy codec capabilities data */
1180 if (len && copy_to_user(ptr, c->caps, len)) {
1181 err = -EFAULT;
1182 break;
1183 }
1184 ptr += len;
1185 }
1186
1187 hci_dev_unlock(hdev);
1188 hci_dev_put(hdev);
1189
1190 lock_sock(sk);
1191
1192 if (!err && put_user(buf_len, optlen))
1193 err = -EFAULT;
1194
1195 break;
1196
1197 default:
1198 err = -ENOPROTOOPT;
1199 break;
1200 }
1201
1202 release_sock(sk);
1203 return err;
1204}
1205
1206static int sco_sock_shutdown(struct socket *sock, int how)
1207{
1208 struct sock *sk = sock->sk;
1209 int err = 0;
1210
1211 BT_DBG("sock %p, sk %p", sock, sk);
1212
1213 if (!sk)
1214 return 0;
1215
1216 sock_hold(sk);
1217 lock_sock(sk);
1218
1219 if (!sk->sk_shutdown) {
1220 sk->sk_shutdown = SHUTDOWN_MASK;
1221 sco_sock_clear_timer(sk);
1222 __sco_sock_close(sk);
1223
1224 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
1225 !(current->flags & PF_EXITING))
1226 err = bt_sock_wait_state(sk, BT_CLOSED,
1227 sk->sk_lingertime);
1228 }
1229
1230 release_sock(sk);
1231 sock_put(sk);
1232
1233 return err;
1234}
1235
1236static int sco_sock_release(struct socket *sock)
1237{
1238 struct sock *sk = sock->sk;
1239 int err = 0;
1240
1241 BT_DBG("sock %p, sk %p", sock, sk);
1242
1243 if (!sk)
1244 return 0;
1245
1246 sco_sock_close(sk);
1247
1248 if (sock_flag(sk, SOCK_LINGER) && READ_ONCE(sk->sk_lingertime) &&
1249 !(current->flags & PF_EXITING)) {
1250 lock_sock(sk);
1251 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
1252 release_sock(sk);
1253 }
1254
1255 sock_orphan(sk);
1256 sco_sock_kill(sk);
1257 return err;
1258}
1259
1260static void sco_conn_ready(struct sco_conn *conn)
1261{
1262 struct sock *parent;
1263 struct sock *sk = conn->sk;
1264
1265 BT_DBG("conn %p", conn);
1266
1267 if (sk) {
1268 lock_sock(sk);
1269 sco_sock_clear_timer(sk);
1270 sk->sk_state = BT_CONNECTED;
1271 sk->sk_state_change(sk);
1272 release_sock(sk);
1273 } else {
1274 sco_conn_lock(conn);
1275
1276 if (!conn->hcon) {
1277 sco_conn_unlock(conn);
1278 return;
1279 }
1280
1281 parent = sco_get_sock_listen(&conn->hcon->src);
1282 if (!parent) {
1283 sco_conn_unlock(conn);
1284 return;
1285 }
1286
1287 lock_sock(parent);
1288
1289 sk = sco_sock_alloc(sock_net(parent), NULL,
1290 BTPROTO_SCO, GFP_ATOMIC, 0);
1291 if (!sk) {
1292 release_sock(parent);
1293 sco_conn_unlock(conn);
1294 return;
1295 }
1296
1297 sco_sock_init(sk, parent);
1298
1299 bacpy(&sco_pi(sk)->src, &conn->hcon->src);
1300 bacpy(&sco_pi(sk)->dst, &conn->hcon->dst);
1301
1302 hci_conn_hold(conn->hcon);
1303 __sco_chan_add(conn, sk, parent);
1304
1305 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags))
1306 sk->sk_state = BT_CONNECT2;
1307 else
1308 sk->sk_state = BT_CONNECTED;
1309
1310 /* Wake up parent */
1311 parent->sk_data_ready(parent);
1312
1313 release_sock(parent);
1314
1315 sco_conn_unlock(conn);
1316 }
1317}
1318
1319/* ----- SCO interface with lower layer (HCI) ----- */
1320int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
1321{
1322 struct sock *sk;
1323 int lm = 0;
1324
1325 BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr);
1326
1327 /* Find listening sockets */
1328 read_lock(&sco_sk_list.lock);
1329 sk_for_each(sk, &sco_sk_list.head) {
1330 if (sk->sk_state != BT_LISTEN)
1331 continue;
1332
1333 if (!bacmp(&sco_pi(sk)->src, &hdev->bdaddr) ||
1334 !bacmp(&sco_pi(sk)->src, BDADDR_ANY)) {
1335 lm |= HCI_LM_ACCEPT;
1336
1337 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))
1338 *flags |= HCI_PROTO_DEFER;
1339 break;
1340 }
1341 }
1342 read_unlock(&sco_sk_list.lock);
1343
1344 return lm;
1345}
1346
1347static void sco_connect_cfm(struct hci_conn *hcon, __u8 status)
1348{
1349 if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
1350 return;
1351
1352 BT_DBG("hcon %p bdaddr %pMR status %u", hcon, &hcon->dst, status);
1353
1354 if (!status) {
1355 struct sco_conn *conn;
1356
1357 conn = sco_conn_add(hcon);
1358 if (conn)
1359 sco_conn_ready(conn);
1360 } else
1361 sco_conn_del(hcon, bt_to_errno(status));
1362}
1363
1364static void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason)
1365{
1366 if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
1367 return;
1368
1369 BT_DBG("hcon %p reason %d", hcon, reason);
1370
1371 sco_conn_del(hcon, bt_to_errno(reason));
1372}
1373
1374void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
1375{
1376 struct sco_conn *conn = hcon->sco_data;
1377
1378 if (!conn)
1379 goto drop;
1380
1381 BT_DBG("conn %p len %u", conn, skb->len);
1382
1383 if (skb->len) {
1384 sco_recv_frame(conn, skb);
1385 return;
1386 }
1387
1388drop:
1389 kfree_skb(skb);
1390}
1391
1392static struct hci_cb sco_cb = {
1393 .name = "SCO",
1394 .connect_cfm = sco_connect_cfm,
1395 .disconn_cfm = sco_disconn_cfm,
1396};
1397
1398static int sco_debugfs_show(struct seq_file *f, void *p)
1399{
1400 struct sock *sk;
1401
1402 read_lock(&sco_sk_list.lock);
1403
1404 sk_for_each(sk, &sco_sk_list.head) {
1405 seq_printf(f, "%pMR %pMR %d\n", &sco_pi(sk)->src,
1406 &sco_pi(sk)->dst, sk->sk_state);
1407 }
1408
1409 read_unlock(&sco_sk_list.lock);
1410
1411 return 0;
1412}
1413
1414DEFINE_SHOW_ATTRIBUTE(sco_debugfs);
1415
1416static struct dentry *sco_debugfs;
1417
1418static const struct proto_ops sco_sock_ops = {
1419 .family = PF_BLUETOOTH,
1420 .owner = THIS_MODULE,
1421 .release = sco_sock_release,
1422 .bind = sco_sock_bind,
1423 .connect = sco_sock_connect,
1424 .listen = sco_sock_listen,
1425 .accept = sco_sock_accept,
1426 .getname = sco_sock_getname,
1427 .sendmsg = sco_sock_sendmsg,
1428 .recvmsg = sco_sock_recvmsg,
1429 .poll = bt_sock_poll,
1430 .ioctl = bt_sock_ioctl,
1431 .gettstamp = sock_gettstamp,
1432 .mmap = sock_no_mmap,
1433 .socketpair = sock_no_socketpair,
1434 .shutdown = sco_sock_shutdown,
1435 .setsockopt = sco_sock_setsockopt,
1436 .getsockopt = sco_sock_getsockopt
1437};
1438
1439static const struct net_proto_family sco_sock_family_ops = {
1440 .family = PF_BLUETOOTH,
1441 .owner = THIS_MODULE,
1442 .create = sco_sock_create,
1443};
1444
1445int __init sco_init(void)
1446{
1447 int err;
1448
1449 BUILD_BUG_ON(sizeof(struct sockaddr_sco) > sizeof(struct sockaddr));
1450
1451 err = proto_register(&sco_proto, 0);
1452 if (err < 0)
1453 return err;
1454
1455 err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops);
1456 if (err < 0) {
1457 BT_ERR("SCO socket registration failed");
1458 goto error;
1459 }
1460
1461 err = bt_procfs_init(&init_net, "sco", &sco_sk_list, NULL);
1462 if (err < 0) {
1463 BT_ERR("Failed to create SCO proc file");
1464 bt_sock_unregister(BTPROTO_SCO);
1465 goto error;
1466 }
1467
1468 BT_INFO("SCO socket layer initialized");
1469
1470 hci_register_cb(&sco_cb);
1471
1472 if (IS_ERR_OR_NULL(bt_debugfs))
1473 return 0;
1474
1475 sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs,
1476 NULL, &sco_debugfs_fops);
1477
1478 return 0;
1479
1480error:
1481 proto_unregister(&sco_proto);
1482 return err;
1483}
1484
1485void sco_exit(void)
1486{
1487 bt_procfs_cleanup(&init_net, "sco");
1488
1489 debugfs_remove(sco_debugfs);
1490
1491 hci_unregister_cb(&sco_cb);
1492
1493 bt_sock_unregister(BTPROTO_SCO);
1494
1495 proto_unregister(&sco_proto);
1496}
1497
1498module_param(disable_esco, bool, 0644);
1499MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation");
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
31#include <net/bluetooth/bluetooth.h>
32#include <net/bluetooth/hci_core.h>
33#include <net/bluetooth/sco.h>
34
35static bool disable_esco;
36
37static const struct proto_ops sco_sock_ops;
38
39static struct bt_sock_list sco_sk_list = {
40 .lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock)
41};
42
43static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent);
44static void sco_chan_del(struct sock *sk, int err);
45
46static void sco_sock_close(struct sock *sk);
47static void sco_sock_kill(struct sock *sk);
48
49/* ---- SCO timers ---- */
50static void sco_sock_timeout(unsigned long arg)
51{
52 struct sock *sk = (struct sock *) arg;
53
54 BT_DBG("sock %p state %d", sk, sk->sk_state);
55
56 bh_lock_sock(sk);
57 sk->sk_err = ETIMEDOUT;
58 sk->sk_state_change(sk);
59 bh_unlock_sock(sk);
60
61 sco_sock_kill(sk);
62 sock_put(sk);
63}
64
65static void sco_sock_set_timer(struct sock *sk, long timeout)
66{
67 BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
68 sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout);
69}
70
71static void sco_sock_clear_timer(struct sock *sk)
72{
73 BT_DBG("sock %p state %d", sk, sk->sk_state);
74 sk_stop_timer(sk, &sk->sk_timer);
75}
76
77/* ---- SCO connections ---- */
78static struct sco_conn *sco_conn_add(struct hci_conn *hcon)
79{
80 struct hci_dev *hdev = hcon->hdev;
81 struct sco_conn *conn = hcon->sco_data;
82
83 if (conn)
84 return conn;
85
86 conn = kzalloc(sizeof(struct sco_conn), GFP_KERNEL);
87 if (!conn)
88 return NULL;
89
90 spin_lock_init(&conn->lock);
91
92 hcon->sco_data = conn;
93 conn->hcon = hcon;
94
95 if (hdev->sco_mtu > 0)
96 conn->mtu = hdev->sco_mtu;
97 else
98 conn->mtu = 60;
99
100 BT_DBG("hcon %p conn %p", hcon, conn);
101
102 return conn;
103}
104
105static struct sock *sco_chan_get(struct sco_conn *conn)
106{
107 struct sock *sk = NULL;
108 sco_conn_lock(conn);
109 sk = conn->sk;
110 sco_conn_unlock(conn);
111 return sk;
112}
113
114static int sco_conn_del(struct hci_conn *hcon, int err)
115{
116 struct sco_conn *conn = hcon->sco_data;
117 struct sock *sk;
118
119 if (!conn)
120 return 0;
121
122 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
123
124 /* Kill socket */
125 sk = sco_chan_get(conn);
126 if (sk) {
127 bh_lock_sock(sk);
128 sco_sock_clear_timer(sk);
129 sco_chan_del(sk, err);
130 bh_unlock_sock(sk);
131 sco_sock_kill(sk);
132 }
133
134 hcon->sco_data = NULL;
135 kfree(conn);
136 return 0;
137}
138
139static int sco_chan_add(struct sco_conn *conn, struct sock *sk,
140 struct sock *parent)
141{
142 int err = 0;
143
144 sco_conn_lock(conn);
145 if (conn->sk)
146 err = -EBUSY;
147 else
148 __sco_chan_add(conn, sk, parent);
149
150 sco_conn_unlock(conn);
151 return err;
152}
153
154static int sco_connect(struct sock *sk)
155{
156 struct sco_conn *conn;
157 struct hci_conn *hcon;
158 struct hci_dev *hdev;
159 int err, type;
160
161 BT_DBG("%pMR -> %pMR", &sco_pi(sk)->src, &sco_pi(sk)->dst);
162
163 hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src);
164 if (!hdev)
165 return -EHOSTUNREACH;
166
167 hci_dev_lock(hdev);
168
169 if (lmp_esco_capable(hdev) && !disable_esco)
170 type = ESCO_LINK;
171 else
172 type = SCO_LINK;
173
174 if (sco_pi(sk)->setting == BT_VOICE_TRANSPARENT &&
175 (!lmp_transp_capable(hdev) || !lmp_esco_capable(hdev))) {
176 err = -EOPNOTSUPP;
177 goto done;
178 }
179
180 hcon = hci_connect_sco(hdev, type, &sco_pi(sk)->dst,
181 sco_pi(sk)->setting);
182 if (IS_ERR(hcon)) {
183 err = PTR_ERR(hcon);
184 goto done;
185 }
186
187 conn = sco_conn_add(hcon);
188 if (!conn) {
189 hci_conn_drop(hcon);
190 err = -ENOMEM;
191 goto done;
192 }
193
194 /* Update source addr of the socket */
195 bacpy(&sco_pi(sk)->src, &hcon->src);
196
197 err = sco_chan_add(conn, sk, NULL);
198 if (err)
199 goto done;
200
201 if (hcon->state == BT_CONNECTED) {
202 sco_sock_clear_timer(sk);
203 sk->sk_state = BT_CONNECTED;
204 } else {
205 sk->sk_state = BT_CONNECT;
206 sco_sock_set_timer(sk, sk->sk_sndtimeo);
207 }
208
209done:
210 hci_dev_unlock(hdev);
211 hci_dev_put(hdev);
212 return err;
213}
214
215static int sco_send_frame(struct sock *sk, struct msghdr *msg, int len)
216{
217 struct sco_conn *conn = sco_pi(sk)->conn;
218 struct sk_buff *skb;
219 int err;
220
221 /* Check outgoing MTU */
222 if (len > conn->mtu)
223 return -EINVAL;
224
225 BT_DBG("sk %p len %d", sk, len);
226
227 skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
228 if (!skb)
229 return err;
230
231 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
232 kfree_skb(skb);
233 return -EFAULT;
234 }
235
236 hci_send_sco(conn->hcon, skb);
237
238 return len;
239}
240
241static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb)
242{
243 struct sock *sk = sco_chan_get(conn);
244
245 if (!sk)
246 goto drop;
247
248 BT_DBG("sk %p len %d", sk, skb->len);
249
250 if (sk->sk_state != BT_CONNECTED)
251 goto drop;
252
253 if (!sock_queue_rcv_skb(sk, skb))
254 return;
255
256drop:
257 kfree_skb(skb);
258}
259
260/* -------- Socket interface ---------- */
261static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba)
262{
263 struct sock *sk;
264
265 sk_for_each(sk, &sco_sk_list.head) {
266 if (sk->sk_state != BT_LISTEN)
267 continue;
268
269 if (!bacmp(&sco_pi(sk)->src, ba))
270 return sk;
271 }
272
273 return NULL;
274}
275
276/* Find socket listening on source bdaddr.
277 * Returns closest match.
278 */
279static struct sock *sco_get_sock_listen(bdaddr_t *src)
280{
281 struct sock *sk = NULL, *sk1 = NULL;
282
283 read_lock(&sco_sk_list.lock);
284
285 sk_for_each(sk, &sco_sk_list.head) {
286 if (sk->sk_state != BT_LISTEN)
287 continue;
288
289 /* Exact match. */
290 if (!bacmp(&sco_pi(sk)->src, src))
291 break;
292
293 /* Closest match */
294 if (!bacmp(&sco_pi(sk)->src, BDADDR_ANY))
295 sk1 = sk;
296 }
297
298 read_unlock(&sco_sk_list.lock);
299
300 return sk ? sk : sk1;
301}
302
303static void sco_sock_destruct(struct sock *sk)
304{
305 BT_DBG("sk %p", sk);
306
307 skb_queue_purge(&sk->sk_receive_queue);
308 skb_queue_purge(&sk->sk_write_queue);
309}
310
311static void sco_sock_cleanup_listen(struct sock *parent)
312{
313 struct sock *sk;
314
315 BT_DBG("parent %p", parent);
316
317 /* Close not yet accepted channels */
318 while ((sk = bt_accept_dequeue(parent, NULL))) {
319 sco_sock_close(sk);
320 sco_sock_kill(sk);
321 }
322
323 parent->sk_state = BT_CLOSED;
324 sock_set_flag(parent, SOCK_ZAPPED);
325}
326
327/* Kill socket (only if zapped and orphan)
328 * Must be called on unlocked socket.
329 */
330static void sco_sock_kill(struct sock *sk)
331{
332 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
333 return;
334
335 BT_DBG("sk %p state %d", sk, sk->sk_state);
336
337 /* Kill poor orphan */
338 bt_sock_unlink(&sco_sk_list, sk);
339 sock_set_flag(sk, SOCK_DEAD);
340 sock_put(sk);
341}
342
343static void __sco_sock_close(struct sock *sk)
344{
345 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
346
347 switch (sk->sk_state) {
348 case BT_LISTEN:
349 sco_sock_cleanup_listen(sk);
350 break;
351
352 case BT_CONNECTED:
353 case BT_CONFIG:
354 if (sco_pi(sk)->conn->hcon) {
355 sk->sk_state = BT_DISCONN;
356 sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT);
357 hci_conn_drop(sco_pi(sk)->conn->hcon);
358 sco_pi(sk)->conn->hcon = NULL;
359 } else
360 sco_chan_del(sk, ECONNRESET);
361 break;
362
363 case BT_CONNECT2:
364 case BT_CONNECT:
365 case BT_DISCONN:
366 sco_chan_del(sk, ECONNRESET);
367 break;
368
369 default:
370 sock_set_flag(sk, SOCK_ZAPPED);
371 break;
372 }
373}
374
375/* Must be called on unlocked socket. */
376static void sco_sock_close(struct sock *sk)
377{
378 sco_sock_clear_timer(sk);
379 lock_sock(sk);
380 __sco_sock_close(sk);
381 release_sock(sk);
382 sco_sock_kill(sk);
383}
384
385static void sco_sock_init(struct sock *sk, struct sock *parent)
386{
387 BT_DBG("sk %p", sk);
388
389 if (parent) {
390 sk->sk_type = parent->sk_type;
391 bt_sk(sk)->flags = bt_sk(parent)->flags;
392 security_sk_clone(parent, sk);
393 }
394}
395
396static struct proto sco_proto = {
397 .name = "SCO",
398 .owner = THIS_MODULE,
399 .obj_size = sizeof(struct sco_pinfo)
400};
401
402static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio)
403{
404 struct sock *sk;
405
406 sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto);
407 if (!sk)
408 return NULL;
409
410 sock_init_data(sock, sk);
411 INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
412
413 sk->sk_destruct = sco_sock_destruct;
414 sk->sk_sndtimeo = SCO_CONN_TIMEOUT;
415
416 sock_reset_flag(sk, SOCK_ZAPPED);
417
418 sk->sk_protocol = proto;
419 sk->sk_state = BT_OPEN;
420
421 sco_pi(sk)->setting = BT_VOICE_CVSD_16BIT;
422
423 setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk);
424
425 bt_sock_link(&sco_sk_list, sk);
426 return sk;
427}
428
429static int sco_sock_create(struct net *net, struct socket *sock, int protocol,
430 int kern)
431{
432 struct sock *sk;
433
434 BT_DBG("sock %p", sock);
435
436 sock->state = SS_UNCONNECTED;
437
438 if (sock->type != SOCK_SEQPACKET)
439 return -ESOCKTNOSUPPORT;
440
441 sock->ops = &sco_sock_ops;
442
443 sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC);
444 if (!sk)
445 return -ENOMEM;
446
447 sco_sock_init(sk, NULL);
448 return 0;
449}
450
451static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
452{
453 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
454 struct sock *sk = sock->sk;
455 int err = 0;
456
457 BT_DBG("sk %p %pMR", sk, &sa->sco_bdaddr);
458
459 if (!addr || addr->sa_family != AF_BLUETOOTH)
460 return -EINVAL;
461
462 lock_sock(sk);
463
464 if (sk->sk_state != BT_OPEN) {
465 err = -EBADFD;
466 goto done;
467 }
468
469 if (sk->sk_type != SOCK_SEQPACKET) {
470 err = -EINVAL;
471 goto done;
472 }
473
474 bacpy(&sco_pi(sk)->src, &sa->sco_bdaddr);
475
476 sk->sk_state = BT_BOUND;
477
478done:
479 release_sock(sk);
480 return err;
481}
482
483static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
484{
485 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
486 struct sock *sk = sock->sk;
487 int err;
488
489 BT_DBG("sk %p", sk);
490
491 if (alen < sizeof(struct sockaddr_sco) ||
492 addr->sa_family != AF_BLUETOOTH)
493 return -EINVAL;
494
495 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
496 return -EBADFD;
497
498 if (sk->sk_type != SOCK_SEQPACKET)
499 return -EINVAL;
500
501 lock_sock(sk);
502
503 /* Set destination address and psm */
504 bacpy(&sco_pi(sk)->dst, &sa->sco_bdaddr);
505
506 err = sco_connect(sk);
507 if (err)
508 goto done;
509
510 err = bt_sock_wait_state(sk, BT_CONNECTED,
511 sock_sndtimeo(sk, flags & O_NONBLOCK));
512
513done:
514 release_sock(sk);
515 return err;
516}
517
518static int sco_sock_listen(struct socket *sock, int backlog)
519{
520 struct sock *sk = sock->sk;
521 bdaddr_t *src = &sco_pi(sk)->src;
522 int err = 0;
523
524 BT_DBG("sk %p backlog %d", sk, backlog);
525
526 lock_sock(sk);
527
528 if (sk->sk_state != BT_BOUND) {
529 err = -EBADFD;
530 goto done;
531 }
532
533 if (sk->sk_type != SOCK_SEQPACKET) {
534 err = -EINVAL;
535 goto done;
536 }
537
538 write_lock(&sco_sk_list.lock);
539
540 if (__sco_get_sock_listen_by_addr(src)) {
541 err = -EADDRINUSE;
542 goto unlock;
543 }
544
545 sk->sk_max_ack_backlog = backlog;
546 sk->sk_ack_backlog = 0;
547
548 sk->sk_state = BT_LISTEN;
549
550unlock:
551 write_unlock(&sco_sk_list.lock);
552
553done:
554 release_sock(sk);
555 return err;
556}
557
558static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags)
559{
560 DECLARE_WAITQUEUE(wait, current);
561 struct sock *sk = sock->sk, *ch;
562 long timeo;
563 int err = 0;
564
565 lock_sock(sk);
566
567 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
568
569 BT_DBG("sk %p timeo %ld", sk, timeo);
570
571 /* Wait for an incoming connection. (wake-one). */
572 add_wait_queue_exclusive(sk_sleep(sk), &wait);
573 while (1) {
574 set_current_state(TASK_INTERRUPTIBLE);
575
576 if (sk->sk_state != BT_LISTEN) {
577 err = -EBADFD;
578 break;
579 }
580
581 ch = bt_accept_dequeue(sk, newsock);
582 if (ch)
583 break;
584
585 if (!timeo) {
586 err = -EAGAIN;
587 break;
588 }
589
590 if (signal_pending(current)) {
591 err = sock_intr_errno(timeo);
592 break;
593 }
594
595 release_sock(sk);
596 timeo = schedule_timeout(timeo);
597 lock_sock(sk);
598 }
599 __set_current_state(TASK_RUNNING);
600 remove_wait_queue(sk_sleep(sk), &wait);
601
602 if (err)
603 goto done;
604
605 newsock->state = SS_CONNECTED;
606
607 BT_DBG("new socket %p", ch);
608
609done:
610 release_sock(sk);
611 return err;
612}
613
614static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer)
615{
616 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
617 struct sock *sk = sock->sk;
618
619 BT_DBG("sock %p, sk %p", sock, sk);
620
621 addr->sa_family = AF_BLUETOOTH;
622 *len = sizeof(struct sockaddr_sco);
623
624 if (peer)
625 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->dst);
626 else
627 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->src);
628
629 return 0;
630}
631
632static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
633 struct msghdr *msg, size_t len)
634{
635 struct sock *sk = sock->sk;
636 int err;
637
638 BT_DBG("sock %p, sk %p", sock, sk);
639
640 err = sock_error(sk);
641 if (err)
642 return err;
643
644 if (msg->msg_flags & MSG_OOB)
645 return -EOPNOTSUPP;
646
647 lock_sock(sk);
648
649 if (sk->sk_state == BT_CONNECTED)
650 err = sco_send_frame(sk, msg, len);
651 else
652 err = -ENOTCONN;
653
654 release_sock(sk);
655 return err;
656}
657
658static void sco_conn_defer_accept(struct hci_conn *conn, u16 setting)
659{
660 struct hci_dev *hdev = conn->hdev;
661
662 BT_DBG("conn %p", conn);
663
664 conn->state = BT_CONFIG;
665
666 if (!lmp_esco_capable(hdev)) {
667 struct hci_cp_accept_conn_req cp;
668
669 bacpy(&cp.bdaddr, &conn->dst);
670 cp.role = 0x00; /* Ignored */
671
672 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
673 } else {
674 struct hci_cp_accept_sync_conn_req cp;
675
676 bacpy(&cp.bdaddr, &conn->dst);
677 cp.pkt_type = cpu_to_le16(conn->pkt_type);
678
679 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
680 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
681 cp.content_format = cpu_to_le16(setting);
682
683 switch (setting & SCO_AIRMODE_MASK) {
684 case SCO_AIRMODE_TRANSP:
685 if (conn->pkt_type & ESCO_2EV3)
686 cp.max_latency = cpu_to_le16(0x0008);
687 else
688 cp.max_latency = cpu_to_le16(0x000D);
689 cp.retrans_effort = 0x02;
690 break;
691 case SCO_AIRMODE_CVSD:
692 cp.max_latency = cpu_to_le16(0xffff);
693 cp.retrans_effort = 0xff;
694 break;
695 }
696
697 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ,
698 sizeof(cp), &cp);
699 }
700}
701
702static int sco_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
703 struct msghdr *msg, size_t len, int flags)
704{
705 struct sock *sk = sock->sk;
706 struct sco_pinfo *pi = sco_pi(sk);
707
708 lock_sock(sk);
709
710 if (sk->sk_state == BT_CONNECT2 &&
711 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
712 sco_conn_defer_accept(pi->conn->hcon, pi->setting);
713 sk->sk_state = BT_CONFIG;
714
715 release_sock(sk);
716 return 0;
717 }
718
719 release_sock(sk);
720
721 return bt_sock_recvmsg(iocb, sock, msg, len, flags);
722}
723
724static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen)
725{
726 struct sock *sk = sock->sk;
727 int len, err = 0;
728 struct bt_voice voice;
729 u32 opt;
730
731 BT_DBG("sk %p", sk);
732
733 lock_sock(sk);
734
735 switch (optname) {
736
737 case BT_DEFER_SETUP:
738 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
739 err = -EINVAL;
740 break;
741 }
742
743 if (get_user(opt, (u32 __user *) optval)) {
744 err = -EFAULT;
745 break;
746 }
747
748 if (opt)
749 set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
750 else
751 clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
752 break;
753
754 case BT_VOICE:
755 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
756 sk->sk_state != BT_CONNECT2) {
757 err = -EINVAL;
758 break;
759 }
760
761 voice.setting = sco_pi(sk)->setting;
762
763 len = min_t(unsigned int, sizeof(voice), optlen);
764 if (copy_from_user((char *) &voice, optval, len)) {
765 err = -EFAULT;
766 break;
767 }
768
769 /* Explicitly check for these values */
770 if (voice.setting != BT_VOICE_TRANSPARENT &&
771 voice.setting != BT_VOICE_CVSD_16BIT) {
772 err = -EINVAL;
773 break;
774 }
775
776 sco_pi(sk)->setting = voice.setting;
777 break;
778
779 default:
780 err = -ENOPROTOOPT;
781 break;
782 }
783
784 release_sock(sk);
785 return err;
786}
787
788static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen)
789{
790 struct sock *sk = sock->sk;
791 struct sco_options opts;
792 struct sco_conninfo cinfo;
793 int len, err = 0;
794
795 BT_DBG("sk %p", sk);
796
797 if (get_user(len, optlen))
798 return -EFAULT;
799
800 lock_sock(sk);
801
802 switch (optname) {
803 case SCO_OPTIONS:
804 if (sk->sk_state != BT_CONNECTED &&
805 !(sk->sk_state == BT_CONNECT2 &&
806 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
807 err = -ENOTCONN;
808 break;
809 }
810
811 opts.mtu = sco_pi(sk)->conn->mtu;
812
813 BT_DBG("mtu %d", opts.mtu);
814
815 len = min_t(unsigned int, len, sizeof(opts));
816 if (copy_to_user(optval, (char *)&opts, len))
817 err = -EFAULT;
818
819 break;
820
821 case SCO_CONNINFO:
822 if (sk->sk_state != BT_CONNECTED &&
823 !(sk->sk_state == BT_CONNECT2 &&
824 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
825 err = -ENOTCONN;
826 break;
827 }
828
829 memset(&cinfo, 0, sizeof(cinfo));
830 cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle;
831 memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3);
832
833 len = min_t(unsigned int, len, sizeof(cinfo));
834 if (copy_to_user(optval, (char *)&cinfo, len))
835 err = -EFAULT;
836
837 break;
838
839 default:
840 err = -ENOPROTOOPT;
841 break;
842 }
843
844 release_sock(sk);
845 return err;
846}
847
848static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
849{
850 struct sock *sk = sock->sk;
851 int len, err = 0;
852 struct bt_voice voice;
853
854 BT_DBG("sk %p", sk);
855
856 if (level == SOL_SCO)
857 return sco_sock_getsockopt_old(sock, optname, optval, optlen);
858
859 if (get_user(len, optlen))
860 return -EFAULT;
861
862 lock_sock(sk);
863
864 switch (optname) {
865
866 case BT_DEFER_SETUP:
867 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
868 err = -EINVAL;
869 break;
870 }
871
872 if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
873 (u32 __user *) optval))
874 err = -EFAULT;
875
876 break;
877
878 case BT_VOICE:
879 voice.setting = sco_pi(sk)->setting;
880
881 len = min_t(unsigned int, len, sizeof(voice));
882 if (copy_to_user(optval, (char *)&voice, len))
883 err = -EFAULT;
884
885 break;
886
887 default:
888 err = -ENOPROTOOPT;
889 break;
890 }
891
892 release_sock(sk);
893 return err;
894}
895
896static int sco_sock_shutdown(struct socket *sock, int how)
897{
898 struct sock *sk = sock->sk;
899 int err = 0;
900
901 BT_DBG("sock %p, sk %p", sock, sk);
902
903 if (!sk)
904 return 0;
905
906 lock_sock(sk);
907 if (!sk->sk_shutdown) {
908 sk->sk_shutdown = SHUTDOWN_MASK;
909 sco_sock_clear_timer(sk);
910 __sco_sock_close(sk);
911
912 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime)
913 err = bt_sock_wait_state(sk, BT_CLOSED,
914 sk->sk_lingertime);
915 }
916 release_sock(sk);
917 return err;
918}
919
920static int sco_sock_release(struct socket *sock)
921{
922 struct sock *sk = sock->sk;
923 int err = 0;
924
925 BT_DBG("sock %p, sk %p", sock, sk);
926
927 if (!sk)
928 return 0;
929
930 sco_sock_close(sk);
931
932 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) {
933 lock_sock(sk);
934 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
935 release_sock(sk);
936 }
937
938 sock_orphan(sk);
939 sco_sock_kill(sk);
940 return err;
941}
942
943static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent)
944{
945 BT_DBG("conn %p", conn);
946
947 sco_pi(sk)->conn = conn;
948 conn->sk = sk;
949
950 if (parent)
951 bt_accept_enqueue(parent, sk);
952}
953
954/* Delete channel.
955 * Must be called on the locked socket. */
956static void sco_chan_del(struct sock *sk, int err)
957{
958 struct sco_conn *conn;
959
960 conn = sco_pi(sk)->conn;
961
962 BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
963
964 if (conn) {
965 sco_conn_lock(conn);
966 conn->sk = NULL;
967 sco_pi(sk)->conn = NULL;
968 sco_conn_unlock(conn);
969
970 if (conn->hcon)
971 hci_conn_drop(conn->hcon);
972 }
973
974 sk->sk_state = BT_CLOSED;
975 sk->sk_err = err;
976 sk->sk_state_change(sk);
977
978 sock_set_flag(sk, SOCK_ZAPPED);
979}
980
981static void sco_conn_ready(struct sco_conn *conn)
982{
983 struct sock *parent;
984 struct sock *sk = conn->sk;
985
986 BT_DBG("conn %p", conn);
987
988 if (sk) {
989 sco_sock_clear_timer(sk);
990 bh_lock_sock(sk);
991 sk->sk_state = BT_CONNECTED;
992 sk->sk_state_change(sk);
993 bh_unlock_sock(sk);
994 } else {
995 sco_conn_lock(conn);
996
997 parent = sco_get_sock_listen(&conn->hcon->src);
998 if (!parent) {
999 sco_conn_unlock(conn);
1000 return;
1001 }
1002
1003 bh_lock_sock(parent);
1004
1005 sk = sco_sock_alloc(sock_net(parent), NULL,
1006 BTPROTO_SCO, GFP_ATOMIC);
1007 if (!sk) {
1008 bh_unlock_sock(parent);
1009 sco_conn_unlock(conn);
1010 return;
1011 }
1012
1013 sco_sock_init(sk, parent);
1014
1015 bacpy(&sco_pi(sk)->src, &conn->hcon->src);
1016 bacpy(&sco_pi(sk)->dst, &conn->hcon->dst);
1017
1018 hci_conn_hold(conn->hcon);
1019 __sco_chan_add(conn, sk, parent);
1020
1021 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags))
1022 sk->sk_state = BT_CONNECT2;
1023 else
1024 sk->sk_state = BT_CONNECTED;
1025
1026 /* Wake up parent */
1027 parent->sk_data_ready(parent);
1028
1029 bh_unlock_sock(parent);
1030
1031 sco_conn_unlock(conn);
1032 }
1033}
1034
1035/* ----- SCO interface with lower layer (HCI) ----- */
1036int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
1037{
1038 struct sock *sk;
1039 int lm = 0;
1040
1041 BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr);
1042
1043 /* Find listening sockets */
1044 read_lock(&sco_sk_list.lock);
1045 sk_for_each(sk, &sco_sk_list.head) {
1046 if (sk->sk_state != BT_LISTEN)
1047 continue;
1048
1049 if (!bacmp(&sco_pi(sk)->src, &hdev->bdaddr) ||
1050 !bacmp(&sco_pi(sk)->src, BDADDR_ANY)) {
1051 lm |= HCI_LM_ACCEPT;
1052
1053 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))
1054 *flags |= HCI_PROTO_DEFER;
1055 break;
1056 }
1057 }
1058 read_unlock(&sco_sk_list.lock);
1059
1060 return lm;
1061}
1062
1063void sco_connect_cfm(struct hci_conn *hcon, __u8 status)
1064{
1065 BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status);
1066 if (!status) {
1067 struct sco_conn *conn;
1068
1069 conn = sco_conn_add(hcon);
1070 if (conn)
1071 sco_conn_ready(conn);
1072 } else
1073 sco_conn_del(hcon, bt_to_errno(status));
1074}
1075
1076void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason)
1077{
1078 BT_DBG("hcon %p reason %d", hcon, reason);
1079
1080 sco_conn_del(hcon, bt_to_errno(reason));
1081}
1082
1083int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
1084{
1085 struct sco_conn *conn = hcon->sco_data;
1086
1087 if (!conn)
1088 goto drop;
1089
1090 BT_DBG("conn %p len %d", conn, skb->len);
1091
1092 if (skb->len) {
1093 sco_recv_frame(conn, skb);
1094 return 0;
1095 }
1096
1097drop:
1098 kfree_skb(skb);
1099 return 0;
1100}
1101
1102static int sco_debugfs_show(struct seq_file *f, void *p)
1103{
1104 struct sock *sk;
1105
1106 read_lock(&sco_sk_list.lock);
1107
1108 sk_for_each(sk, &sco_sk_list.head) {
1109 seq_printf(f, "%pMR %pMR %d\n", &sco_pi(sk)->src,
1110 &sco_pi(sk)->dst, sk->sk_state);
1111 }
1112
1113 read_unlock(&sco_sk_list.lock);
1114
1115 return 0;
1116}
1117
1118static int sco_debugfs_open(struct inode *inode, struct file *file)
1119{
1120 return single_open(file, sco_debugfs_show, inode->i_private);
1121}
1122
1123static const struct file_operations sco_debugfs_fops = {
1124 .open = sco_debugfs_open,
1125 .read = seq_read,
1126 .llseek = seq_lseek,
1127 .release = single_release,
1128};
1129
1130static struct dentry *sco_debugfs;
1131
1132static const struct proto_ops sco_sock_ops = {
1133 .family = PF_BLUETOOTH,
1134 .owner = THIS_MODULE,
1135 .release = sco_sock_release,
1136 .bind = sco_sock_bind,
1137 .connect = sco_sock_connect,
1138 .listen = sco_sock_listen,
1139 .accept = sco_sock_accept,
1140 .getname = sco_sock_getname,
1141 .sendmsg = sco_sock_sendmsg,
1142 .recvmsg = sco_sock_recvmsg,
1143 .poll = bt_sock_poll,
1144 .ioctl = bt_sock_ioctl,
1145 .mmap = sock_no_mmap,
1146 .socketpair = sock_no_socketpair,
1147 .shutdown = sco_sock_shutdown,
1148 .setsockopt = sco_sock_setsockopt,
1149 .getsockopt = sco_sock_getsockopt
1150};
1151
1152static const struct net_proto_family sco_sock_family_ops = {
1153 .family = PF_BLUETOOTH,
1154 .owner = THIS_MODULE,
1155 .create = sco_sock_create,
1156};
1157
1158int __init sco_init(void)
1159{
1160 int err;
1161
1162 err = proto_register(&sco_proto, 0);
1163 if (err < 0)
1164 return err;
1165
1166 err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops);
1167 if (err < 0) {
1168 BT_ERR("SCO socket registration failed");
1169 goto error;
1170 }
1171
1172 err = bt_procfs_init(&init_net, "sco", &sco_sk_list, NULL);
1173 if (err < 0) {
1174 BT_ERR("Failed to create SCO proc file");
1175 bt_sock_unregister(BTPROTO_SCO);
1176 goto error;
1177 }
1178
1179 BT_INFO("SCO socket layer initialized");
1180
1181 if (IS_ERR_OR_NULL(bt_debugfs))
1182 return 0;
1183
1184 sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs,
1185 NULL, &sco_debugfs_fops);
1186
1187 return 0;
1188
1189error:
1190 proto_unregister(&sco_proto);
1191 return err;
1192}
1193
1194void __exit sco_exit(void)
1195{
1196 bt_procfs_cleanup(&init_net, "sco");
1197
1198 debugfs_remove(sco_debugfs);
1199
1200 bt_sock_unregister(BTPROTO_SCO);
1201
1202 proto_unregister(&sco_proto);
1203}
1204
1205module_param(disable_esco, bool, 0644);
1206MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation");