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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
43/* ---- SCO connections ---- */
44struct sco_conn {
45 struct hci_conn *hcon;
46
47 spinlock_t lock;
48 struct sock *sk;
49
50 unsigned int mtu;
51};
52
53#define sco_conn_lock(c) spin_lock(&c->lock);
54#define sco_conn_unlock(c) spin_unlock(&c->lock);
55
56static void sco_sock_close(struct sock *sk);
57static void sco_sock_kill(struct sock *sk);
58
59/* ----- SCO socket info ----- */
60#define sco_pi(sk) ((struct sco_pinfo *) sk)
61
62struct sco_pinfo {
63 struct bt_sock bt;
64 bdaddr_t src;
65 bdaddr_t dst;
66 __u32 flags;
67 __u16 setting;
68 struct sco_conn *conn;
69};
70
71/* ---- SCO timers ---- */
72#define SCO_CONN_TIMEOUT (HZ * 40)
73#define SCO_DISCONN_TIMEOUT (HZ * 2)
74
75static void sco_sock_timeout(unsigned long arg)
76{
77 struct sock *sk = (struct sock *)arg;
78
79 BT_DBG("sock %p state %d", sk, sk->sk_state);
80
81 bh_lock_sock(sk);
82 sk->sk_err = ETIMEDOUT;
83 sk->sk_state_change(sk);
84 bh_unlock_sock(sk);
85
86 sco_sock_kill(sk);
87 sock_put(sk);
88}
89
90static void sco_sock_set_timer(struct sock *sk, long timeout)
91{
92 BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
93 sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout);
94}
95
96static void sco_sock_clear_timer(struct sock *sk)
97{
98 BT_DBG("sock %p state %d", sk, sk->sk_state);
99 sk_stop_timer(sk, &sk->sk_timer);
100}
101
102/* ---- SCO connections ---- */
103static struct sco_conn *sco_conn_add(struct hci_conn *hcon)
104{
105 struct hci_dev *hdev = hcon->hdev;
106 struct sco_conn *conn = hcon->sco_data;
107
108 if (conn)
109 return conn;
110
111 conn = kzalloc(sizeof(struct sco_conn), GFP_KERNEL);
112 if (!conn)
113 return NULL;
114
115 spin_lock_init(&conn->lock);
116
117 hcon->sco_data = conn;
118 conn->hcon = hcon;
119
120 if (hdev->sco_mtu > 0)
121 conn->mtu = hdev->sco_mtu;
122 else
123 conn->mtu = 60;
124
125 BT_DBG("hcon %p conn %p", hcon, conn);
126
127 return conn;
128}
129
130/* Delete channel.
131 * Must be called on the locked socket. */
132static void sco_chan_del(struct sock *sk, int err)
133{
134 struct sco_conn *conn;
135
136 conn = sco_pi(sk)->conn;
137
138 BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
139
140 if (conn) {
141 sco_conn_lock(conn);
142 conn->sk = NULL;
143 sco_pi(sk)->conn = NULL;
144 sco_conn_unlock(conn);
145
146 if (conn->hcon)
147 hci_conn_drop(conn->hcon);
148 }
149
150 sk->sk_state = BT_CLOSED;
151 sk->sk_err = err;
152 sk->sk_state_change(sk);
153
154 sock_set_flag(sk, SOCK_ZAPPED);
155}
156
157static void sco_conn_del(struct hci_conn *hcon, int err)
158{
159 struct sco_conn *conn = hcon->sco_data;
160 struct sock *sk;
161
162 if (!conn)
163 return;
164
165 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
166
167 /* Kill socket */
168 sco_conn_lock(conn);
169 sk = conn->sk;
170 sco_conn_unlock(conn);
171
172 if (sk) {
173 sock_hold(sk);
174 bh_lock_sock(sk);
175 sco_sock_clear_timer(sk);
176 sco_chan_del(sk, err);
177 bh_unlock_sock(sk);
178 sco_sock_kill(sk);
179 sock_put(sk);
180 }
181
182 hcon->sco_data = NULL;
183 kfree(conn);
184}
185
186static void __sco_chan_add(struct sco_conn *conn, struct sock *sk,
187 struct sock *parent)
188{
189 BT_DBG("conn %p", conn);
190
191 sco_pi(sk)->conn = conn;
192 conn->sk = sk;
193
194 if (parent)
195 bt_accept_enqueue(parent, sk);
196}
197
198static int sco_chan_add(struct sco_conn *conn, struct sock *sk,
199 struct sock *parent)
200{
201 int err = 0;
202
203 sco_conn_lock(conn);
204 if (conn->sk)
205 err = -EBUSY;
206 else
207 __sco_chan_add(conn, sk, parent);
208
209 sco_conn_unlock(conn);
210 return err;
211}
212
213static int sco_connect(struct sock *sk)
214{
215 struct sco_conn *conn;
216 struct hci_conn *hcon;
217 struct hci_dev *hdev;
218 int err, type;
219
220 BT_DBG("%pMR -> %pMR", &sco_pi(sk)->src, &sco_pi(sk)->dst);
221
222 hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src, BDADDR_BREDR);
223 if (!hdev)
224 return -EHOSTUNREACH;
225
226 hci_dev_lock(hdev);
227
228 if (lmp_esco_capable(hdev) && !disable_esco)
229 type = ESCO_LINK;
230 else
231 type = SCO_LINK;
232
233 if (sco_pi(sk)->setting == BT_VOICE_TRANSPARENT &&
234 (!lmp_transp_capable(hdev) || !lmp_esco_capable(hdev))) {
235 err = -EOPNOTSUPP;
236 goto done;
237 }
238
239 hcon = hci_connect_sco(hdev, type, &sco_pi(sk)->dst,
240 sco_pi(sk)->setting);
241 if (IS_ERR(hcon)) {
242 err = PTR_ERR(hcon);
243 goto done;
244 }
245
246 conn = sco_conn_add(hcon);
247 if (!conn) {
248 hci_conn_drop(hcon);
249 err = -ENOMEM;
250 goto done;
251 }
252
253 /* Update source addr of the socket */
254 bacpy(&sco_pi(sk)->src, &hcon->src);
255
256 err = sco_chan_add(conn, sk, NULL);
257 if (err)
258 goto done;
259
260 if (hcon->state == BT_CONNECTED) {
261 sco_sock_clear_timer(sk);
262 sk->sk_state = BT_CONNECTED;
263 } else {
264 sk->sk_state = BT_CONNECT;
265 sco_sock_set_timer(sk, sk->sk_sndtimeo);
266 }
267
268done:
269 hci_dev_unlock(hdev);
270 hci_dev_put(hdev);
271 return err;
272}
273
274static int sco_send_frame(struct sock *sk, struct msghdr *msg, int len)
275{
276 struct sco_conn *conn = sco_pi(sk)->conn;
277 struct sk_buff *skb;
278 int err;
279
280 /* Check outgoing MTU */
281 if (len > conn->mtu)
282 return -EINVAL;
283
284 BT_DBG("sk %p len %d", sk, len);
285
286 skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
287 if (!skb)
288 return err;
289
290 if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
291 kfree_skb(skb);
292 return -EFAULT;
293 }
294
295 hci_send_sco(conn->hcon, skb);
296
297 return len;
298}
299
300static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb)
301{
302 struct sock *sk;
303
304 sco_conn_lock(conn);
305 sk = conn->sk;
306 sco_conn_unlock(conn);
307
308 if (!sk)
309 goto drop;
310
311 BT_DBG("sk %p len %d", sk, skb->len);
312
313 if (sk->sk_state != BT_CONNECTED)
314 goto drop;
315
316 if (!sock_queue_rcv_skb(sk, skb))
317 return;
318
319drop:
320 kfree_skb(skb);
321}
322
323/* -------- Socket interface ---------- */
324static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba)
325{
326 struct sock *sk;
327
328 sk_for_each(sk, &sco_sk_list.head) {
329 if (sk->sk_state != BT_LISTEN)
330 continue;
331
332 if (!bacmp(&sco_pi(sk)->src, ba))
333 return sk;
334 }
335
336 return NULL;
337}
338
339/* Find socket listening on source bdaddr.
340 * Returns closest match.
341 */
342static struct sock *sco_get_sock_listen(bdaddr_t *src)
343{
344 struct sock *sk = NULL, *sk1 = NULL;
345
346 read_lock(&sco_sk_list.lock);
347
348 sk_for_each(sk, &sco_sk_list.head) {
349 if (sk->sk_state != BT_LISTEN)
350 continue;
351
352 /* Exact match. */
353 if (!bacmp(&sco_pi(sk)->src, src))
354 break;
355
356 /* Closest match */
357 if (!bacmp(&sco_pi(sk)->src, BDADDR_ANY))
358 sk1 = sk;
359 }
360
361 read_unlock(&sco_sk_list.lock);
362
363 return sk ? sk : sk1;
364}
365
366static void sco_sock_destruct(struct sock *sk)
367{
368 BT_DBG("sk %p", sk);
369
370 skb_queue_purge(&sk->sk_receive_queue);
371 skb_queue_purge(&sk->sk_write_queue);
372}
373
374static void sco_sock_cleanup_listen(struct sock *parent)
375{
376 struct sock *sk;
377
378 BT_DBG("parent %p", parent);
379
380 /* Close not yet accepted channels */
381 while ((sk = bt_accept_dequeue(parent, NULL))) {
382 sco_sock_close(sk);
383 sco_sock_kill(sk);
384 }
385
386 parent->sk_state = BT_CLOSED;
387 sock_set_flag(parent, SOCK_ZAPPED);
388}
389
390/* Kill socket (only if zapped and orphan)
391 * Must be called on unlocked socket.
392 */
393static void sco_sock_kill(struct sock *sk)
394{
395 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
396 return;
397
398 BT_DBG("sk %p state %d", sk, sk->sk_state);
399
400 /* Kill poor orphan */
401 bt_sock_unlink(&sco_sk_list, sk);
402 sock_set_flag(sk, SOCK_DEAD);
403 sock_put(sk);
404}
405
406static void __sco_sock_close(struct sock *sk)
407{
408 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
409
410 switch (sk->sk_state) {
411 case BT_LISTEN:
412 sco_sock_cleanup_listen(sk);
413 break;
414
415 case BT_CONNECTED:
416 case BT_CONFIG:
417 if (sco_pi(sk)->conn->hcon) {
418 sk->sk_state = BT_DISCONN;
419 sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT);
420 sco_conn_lock(sco_pi(sk)->conn);
421 hci_conn_drop(sco_pi(sk)->conn->hcon);
422 sco_pi(sk)->conn->hcon = NULL;
423 sco_conn_unlock(sco_pi(sk)->conn);
424 } else
425 sco_chan_del(sk, ECONNRESET);
426 break;
427
428 case BT_CONNECT2:
429 case BT_CONNECT:
430 case BT_DISCONN:
431 sco_chan_del(sk, ECONNRESET);
432 break;
433
434 default:
435 sock_set_flag(sk, SOCK_ZAPPED);
436 break;
437 }
438}
439
440/* Must be called on unlocked socket. */
441static void sco_sock_close(struct sock *sk)
442{
443 sco_sock_clear_timer(sk);
444 lock_sock(sk);
445 __sco_sock_close(sk);
446 release_sock(sk);
447 sco_sock_kill(sk);
448}
449
450static void sco_sock_init(struct sock *sk, struct sock *parent)
451{
452 BT_DBG("sk %p", sk);
453
454 if (parent) {
455 sk->sk_type = parent->sk_type;
456 bt_sk(sk)->flags = bt_sk(parent)->flags;
457 security_sk_clone(parent, sk);
458 }
459}
460
461static struct proto sco_proto = {
462 .name = "SCO",
463 .owner = THIS_MODULE,
464 .obj_size = sizeof(struct sco_pinfo)
465};
466
467static struct sock *sco_sock_alloc(struct net *net, struct socket *sock,
468 int proto, gfp_t prio, int kern)
469{
470 struct sock *sk;
471
472 sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto, kern);
473 if (!sk)
474 return NULL;
475
476 sock_init_data(sock, sk);
477 INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
478
479 sk->sk_destruct = sco_sock_destruct;
480 sk->sk_sndtimeo = SCO_CONN_TIMEOUT;
481
482 sock_reset_flag(sk, SOCK_ZAPPED);
483
484 sk->sk_protocol = proto;
485 sk->sk_state = BT_OPEN;
486
487 sco_pi(sk)->setting = BT_VOICE_CVSD_16BIT;
488
489 setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk);
490
491 bt_sock_link(&sco_sk_list, sk);
492 return sk;
493}
494
495static int sco_sock_create(struct net *net, struct socket *sock, int protocol,
496 int kern)
497{
498 struct sock *sk;
499
500 BT_DBG("sock %p", sock);
501
502 sock->state = SS_UNCONNECTED;
503
504 if (sock->type != SOCK_SEQPACKET)
505 return -ESOCKTNOSUPPORT;
506
507 sock->ops = &sco_sock_ops;
508
509 sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
510 if (!sk)
511 return -ENOMEM;
512
513 sco_sock_init(sk, NULL);
514 return 0;
515}
516
517static int sco_sock_bind(struct socket *sock, struct sockaddr *addr,
518 int addr_len)
519{
520 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
521 struct sock *sk = sock->sk;
522 int err = 0;
523
524 BT_DBG("sk %p %pMR", sk, &sa->sco_bdaddr);
525
526 if (!addr || addr->sa_family != AF_BLUETOOTH)
527 return -EINVAL;
528
529 if (addr_len < sizeof(struct sockaddr_sco))
530 return -EINVAL;
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)
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 *len, 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 *len = sizeof(struct sockaddr_sco);
693
694 if (peer)
695 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->dst);
696 else
697 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->src);
698
699 return 0;
700}
701
702static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg,
703 size_t len)
704{
705 struct sock *sk = sock->sk;
706 int err;
707
708 BT_DBG("sock %p, sk %p", sock, sk);
709
710 err = sock_error(sk);
711 if (err)
712 return err;
713
714 if (msg->msg_flags & MSG_OOB)
715 return -EOPNOTSUPP;
716
717 lock_sock(sk);
718
719 if (sk->sk_state == BT_CONNECTED)
720 err = sco_send_frame(sk, msg, len);
721 else
722 err = -ENOTCONN;
723
724 release_sock(sk);
725 return err;
726}
727
728static void sco_conn_defer_accept(struct hci_conn *conn, u16 setting)
729{
730 struct hci_dev *hdev = conn->hdev;
731
732 BT_DBG("conn %p", conn);
733
734 conn->state = BT_CONFIG;
735
736 if (!lmp_esco_capable(hdev)) {
737 struct hci_cp_accept_conn_req cp;
738
739 bacpy(&cp.bdaddr, &conn->dst);
740 cp.role = 0x00; /* Ignored */
741
742 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
743 } else {
744 struct hci_cp_accept_sync_conn_req cp;
745
746 bacpy(&cp.bdaddr, &conn->dst);
747 cp.pkt_type = cpu_to_le16(conn->pkt_type);
748
749 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
750 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
751 cp.content_format = cpu_to_le16(setting);
752
753 switch (setting & SCO_AIRMODE_MASK) {
754 case SCO_AIRMODE_TRANSP:
755 if (conn->pkt_type & ESCO_2EV3)
756 cp.max_latency = cpu_to_le16(0x0008);
757 else
758 cp.max_latency = cpu_to_le16(0x000D);
759 cp.retrans_effort = 0x02;
760 break;
761 case SCO_AIRMODE_CVSD:
762 cp.max_latency = cpu_to_le16(0xffff);
763 cp.retrans_effort = 0xff;
764 break;
765 }
766
767 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ,
768 sizeof(cp), &cp);
769 }
770}
771
772static int sco_sock_recvmsg(struct socket *sock, struct msghdr *msg,
773 size_t len, int flags)
774{
775 struct sock *sk = sock->sk;
776 struct sco_pinfo *pi = sco_pi(sk);
777
778 lock_sock(sk);
779
780 if (sk->sk_state == BT_CONNECT2 &&
781 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
782 sco_conn_defer_accept(pi->conn->hcon, pi->setting);
783 sk->sk_state = BT_CONFIG;
784
785 release_sock(sk);
786 return 0;
787 }
788
789 release_sock(sk);
790
791 return bt_sock_recvmsg(sock, msg, len, flags);
792}
793
794static int sco_sock_setsockopt(struct socket *sock, int level, int optname,
795 char __user *optval, unsigned int optlen)
796{
797 struct sock *sk = sock->sk;
798 int len, err = 0;
799 struct bt_voice voice;
800 u32 opt;
801
802 BT_DBG("sk %p", sk);
803
804 lock_sock(sk);
805
806 switch (optname) {
807
808 case BT_DEFER_SETUP:
809 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
810 err = -EINVAL;
811 break;
812 }
813
814 if (get_user(opt, (u32 __user *) optval)) {
815 err = -EFAULT;
816 break;
817 }
818
819 if (opt)
820 set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
821 else
822 clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
823 break;
824
825 case BT_VOICE:
826 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
827 sk->sk_state != BT_CONNECT2) {
828 err = -EINVAL;
829 break;
830 }
831
832 voice.setting = sco_pi(sk)->setting;
833
834 len = min_t(unsigned int, sizeof(voice), optlen);
835 if (copy_from_user((char *)&voice, optval, len)) {
836 err = -EFAULT;
837 break;
838 }
839
840 /* Explicitly check for these values */
841 if (voice.setting != BT_VOICE_TRANSPARENT &&
842 voice.setting != BT_VOICE_CVSD_16BIT) {
843 err = -EINVAL;
844 break;
845 }
846
847 sco_pi(sk)->setting = voice.setting;
848 break;
849
850 default:
851 err = -ENOPROTOOPT;
852 break;
853 }
854
855 release_sock(sk);
856 return err;
857}
858
859static int sco_sock_getsockopt_old(struct socket *sock, int optname,
860 char __user *optval, int __user *optlen)
861{
862 struct sock *sk = sock->sk;
863 struct sco_options opts;
864 struct sco_conninfo cinfo;
865 int len, err = 0;
866
867 BT_DBG("sk %p", sk);
868
869 if (get_user(len, optlen))
870 return -EFAULT;
871
872 lock_sock(sk);
873
874 switch (optname) {
875 case SCO_OPTIONS:
876 if (sk->sk_state != BT_CONNECTED &&
877 !(sk->sk_state == BT_CONNECT2 &&
878 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
879 err = -ENOTCONN;
880 break;
881 }
882
883 opts.mtu = sco_pi(sk)->conn->mtu;
884
885 BT_DBG("mtu %d", opts.mtu);
886
887 len = min_t(unsigned int, len, sizeof(opts));
888 if (copy_to_user(optval, (char *)&opts, len))
889 err = -EFAULT;
890
891 break;
892
893 case SCO_CONNINFO:
894 if (sk->sk_state != BT_CONNECTED &&
895 !(sk->sk_state == BT_CONNECT2 &&
896 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
897 err = -ENOTCONN;
898 break;
899 }
900
901 memset(&cinfo, 0, sizeof(cinfo));
902 cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle;
903 memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3);
904
905 len = min_t(unsigned int, len, sizeof(cinfo));
906 if (copy_to_user(optval, (char *)&cinfo, len))
907 err = -EFAULT;
908
909 break;
910
911 default:
912 err = -ENOPROTOOPT;
913 break;
914 }
915
916 release_sock(sk);
917 return err;
918}
919
920static int sco_sock_getsockopt(struct socket *sock, int level, int optname,
921 char __user *optval, int __user *optlen)
922{
923 struct sock *sk = sock->sk;
924 int len, err = 0;
925 struct bt_voice voice;
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 default:
961 err = -ENOPROTOOPT;
962 break;
963 }
964
965 release_sock(sk);
966 return err;
967}
968
969static int sco_sock_shutdown(struct socket *sock, int how)
970{
971 struct sock *sk = sock->sk;
972 int err = 0;
973
974 BT_DBG("sock %p, sk %p", sock, sk);
975
976 if (!sk)
977 return 0;
978
979 sock_hold(sk);
980 lock_sock(sk);
981
982 if (!sk->sk_shutdown) {
983 sk->sk_shutdown = SHUTDOWN_MASK;
984 sco_sock_clear_timer(sk);
985 __sco_sock_close(sk);
986
987 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
988 !(current->flags & PF_EXITING))
989 err = bt_sock_wait_state(sk, BT_CLOSED,
990 sk->sk_lingertime);
991 }
992
993 release_sock(sk);
994 sock_put(sk);
995
996 return err;
997}
998
999static int sco_sock_release(struct socket *sock)
1000{
1001 struct sock *sk = sock->sk;
1002 int err = 0;
1003
1004 BT_DBG("sock %p, sk %p", sock, sk);
1005
1006 if (!sk)
1007 return 0;
1008
1009 sco_sock_close(sk);
1010
1011 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
1012 !(current->flags & PF_EXITING)) {
1013 lock_sock(sk);
1014 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
1015 release_sock(sk);
1016 }
1017
1018 sock_orphan(sk);
1019 sco_sock_kill(sk);
1020 return err;
1021}
1022
1023static void sco_conn_ready(struct sco_conn *conn)
1024{
1025 struct sock *parent;
1026 struct sock *sk = conn->sk;
1027
1028 BT_DBG("conn %p", conn);
1029
1030 if (sk) {
1031 sco_sock_clear_timer(sk);
1032 bh_lock_sock(sk);
1033 sk->sk_state = BT_CONNECTED;
1034 sk->sk_state_change(sk);
1035 bh_unlock_sock(sk);
1036 } else {
1037 sco_conn_lock(conn);
1038
1039 if (!conn->hcon) {
1040 sco_conn_unlock(conn);
1041 return;
1042 }
1043
1044 parent = sco_get_sock_listen(&conn->hcon->src);
1045 if (!parent) {
1046 sco_conn_unlock(conn);
1047 return;
1048 }
1049
1050 bh_lock_sock(parent);
1051
1052 sk = sco_sock_alloc(sock_net(parent), NULL,
1053 BTPROTO_SCO, GFP_ATOMIC, 0);
1054 if (!sk) {
1055 bh_unlock_sock(parent);
1056 sco_conn_unlock(conn);
1057 return;
1058 }
1059
1060 sco_sock_init(sk, parent);
1061
1062 bacpy(&sco_pi(sk)->src, &conn->hcon->src);
1063 bacpy(&sco_pi(sk)->dst, &conn->hcon->dst);
1064
1065 hci_conn_hold(conn->hcon);
1066 __sco_chan_add(conn, sk, parent);
1067
1068 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags))
1069 sk->sk_state = BT_CONNECT2;
1070 else
1071 sk->sk_state = BT_CONNECTED;
1072
1073 /* Wake up parent */
1074 parent->sk_data_ready(parent);
1075
1076 bh_unlock_sock(parent);
1077
1078 sco_conn_unlock(conn);
1079 }
1080}
1081
1082/* ----- SCO interface with lower layer (HCI) ----- */
1083int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
1084{
1085 struct sock *sk;
1086 int lm = 0;
1087
1088 BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr);
1089
1090 /* Find listening sockets */
1091 read_lock(&sco_sk_list.lock);
1092 sk_for_each(sk, &sco_sk_list.head) {
1093 if (sk->sk_state != BT_LISTEN)
1094 continue;
1095
1096 if (!bacmp(&sco_pi(sk)->src, &hdev->bdaddr) ||
1097 !bacmp(&sco_pi(sk)->src, BDADDR_ANY)) {
1098 lm |= HCI_LM_ACCEPT;
1099
1100 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))
1101 *flags |= HCI_PROTO_DEFER;
1102 break;
1103 }
1104 }
1105 read_unlock(&sco_sk_list.lock);
1106
1107 return lm;
1108}
1109
1110static void sco_connect_cfm(struct hci_conn *hcon, __u8 status)
1111{
1112 if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
1113 return;
1114
1115 BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status);
1116
1117 if (!status) {
1118 struct sco_conn *conn;
1119
1120 conn = sco_conn_add(hcon);
1121 if (conn)
1122 sco_conn_ready(conn);
1123 } else
1124 sco_conn_del(hcon, bt_to_errno(status));
1125}
1126
1127static void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason)
1128{
1129 if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
1130 return;
1131
1132 BT_DBG("hcon %p reason %d", hcon, reason);
1133
1134 sco_conn_del(hcon, bt_to_errno(reason));
1135}
1136
1137void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
1138{
1139 struct sco_conn *conn = hcon->sco_data;
1140
1141 if (!conn)
1142 goto drop;
1143
1144 BT_DBG("conn %p len %d", conn, skb->len);
1145
1146 if (skb->len) {
1147 sco_recv_frame(conn, skb);
1148 return;
1149 }
1150
1151drop:
1152 kfree_skb(skb);
1153}
1154
1155static struct hci_cb sco_cb = {
1156 .name = "SCO",
1157 .connect_cfm = sco_connect_cfm,
1158 .disconn_cfm = sco_disconn_cfm,
1159};
1160
1161static int sco_debugfs_show(struct seq_file *f, void *p)
1162{
1163 struct sock *sk;
1164
1165 read_lock(&sco_sk_list.lock);
1166
1167 sk_for_each(sk, &sco_sk_list.head) {
1168 seq_printf(f, "%pMR %pMR %d\n", &sco_pi(sk)->src,
1169 &sco_pi(sk)->dst, sk->sk_state);
1170 }
1171
1172 read_unlock(&sco_sk_list.lock);
1173
1174 return 0;
1175}
1176
1177static int sco_debugfs_open(struct inode *inode, struct file *file)
1178{
1179 return single_open(file, sco_debugfs_show, inode->i_private);
1180}
1181
1182static const struct file_operations sco_debugfs_fops = {
1183 .open = sco_debugfs_open,
1184 .read = seq_read,
1185 .llseek = seq_lseek,
1186 .release = single_release,
1187};
1188
1189static struct dentry *sco_debugfs;
1190
1191static const struct proto_ops sco_sock_ops = {
1192 .family = PF_BLUETOOTH,
1193 .owner = THIS_MODULE,
1194 .release = sco_sock_release,
1195 .bind = sco_sock_bind,
1196 .connect = sco_sock_connect,
1197 .listen = sco_sock_listen,
1198 .accept = sco_sock_accept,
1199 .getname = sco_sock_getname,
1200 .sendmsg = sco_sock_sendmsg,
1201 .recvmsg = sco_sock_recvmsg,
1202 .poll = bt_sock_poll,
1203 .ioctl = bt_sock_ioctl,
1204 .mmap = sock_no_mmap,
1205 .socketpair = sock_no_socketpair,
1206 .shutdown = sco_sock_shutdown,
1207 .setsockopt = sco_sock_setsockopt,
1208 .getsockopt = sco_sock_getsockopt
1209};
1210
1211static const struct net_proto_family sco_sock_family_ops = {
1212 .family = PF_BLUETOOTH,
1213 .owner = THIS_MODULE,
1214 .create = sco_sock_create,
1215};
1216
1217int __init sco_init(void)
1218{
1219 int err;
1220
1221 BUILD_BUG_ON(sizeof(struct sockaddr_sco) > sizeof(struct sockaddr));
1222
1223 err = proto_register(&sco_proto, 0);
1224 if (err < 0)
1225 return err;
1226
1227 err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops);
1228 if (err < 0) {
1229 BT_ERR("SCO socket registration failed");
1230 goto error;
1231 }
1232
1233 err = bt_procfs_init(&init_net, "sco", &sco_sk_list, NULL);
1234 if (err < 0) {
1235 BT_ERR("Failed to create SCO proc file");
1236 bt_sock_unregister(BTPROTO_SCO);
1237 goto error;
1238 }
1239
1240 BT_INFO("SCO socket layer initialized");
1241
1242 hci_register_cb(&sco_cb);
1243
1244 if (IS_ERR_OR_NULL(bt_debugfs))
1245 return 0;
1246
1247 sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs,
1248 NULL, &sco_debugfs_fops);
1249
1250 return 0;
1251
1252error:
1253 proto_unregister(&sco_proto);
1254 return err;
1255}
1256
1257void sco_exit(void)
1258{
1259 bt_procfs_cleanup(&init_net, "sco");
1260
1261 debugfs_remove(sco_debugfs);
1262
1263 hci_unregister_cb(&sco_cb);
1264
1265 bt_sock_unregister(BTPROTO_SCO);
1266
1267 proto_unregister(&sco_proto);
1268}
1269
1270module_param(disable_esco, bool, 0644);
1271MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation");