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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
29#include <linux/types.h>
30#include <linux/errno.h>
31#include <linux/kernel.h>
32#include <linux/sched.h>
33#include <linux/slab.h>
34#include <linux/poll.h>
35#include <linux/fcntl.h>
36#include <linux/init.h>
37#include <linux/interrupt.h>
38#include <linux/socket.h>
39#include <linux/skbuff.h>
40#include <linux/device.h>
41#include <linux/debugfs.h>
42#include <linux/seq_file.h>
43#include <linux/list.h>
44#include <linux/security.h>
45#include <net/sock.h>
46
47#include <linux/uaccess.h>
48
49#include <net/bluetooth/bluetooth.h>
50#include <net/bluetooth/hci_core.h>
51#include <net/bluetooth/sco.h>
52
53static bool disable_esco;
54
55static const struct proto_ops sco_sock_ops;
56
57static struct bt_sock_list sco_sk_list = {
58 .lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock)
59};
60
61static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent);
62static void sco_chan_del(struct sock *sk, int err);
63
64static void sco_sock_close(struct sock *sk);
65static void sco_sock_kill(struct sock *sk);
66
67/* ---- SCO timers ---- */
68static void sco_sock_timeout(unsigned long arg)
69{
70 struct sock *sk = (struct sock *) arg;
71
72 BT_DBG("sock %p state %d", sk, sk->sk_state);
73
74 bh_lock_sock(sk);
75 sk->sk_err = ETIMEDOUT;
76 sk->sk_state_change(sk);
77 bh_unlock_sock(sk);
78
79 sco_sock_kill(sk);
80 sock_put(sk);
81}
82
83static void sco_sock_set_timer(struct sock *sk, long timeout)
84{
85 BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
86 sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout);
87}
88
89static void sco_sock_clear_timer(struct sock *sk)
90{
91 BT_DBG("sock %p state %d", sk, sk->sk_state);
92 sk_stop_timer(sk, &sk->sk_timer);
93}
94
95/* ---- SCO connections ---- */
96static struct sco_conn *sco_conn_add(struct hci_conn *hcon)
97{
98 struct hci_dev *hdev = hcon->hdev;
99 struct sco_conn *conn = hcon->sco_data;
100
101 if (conn)
102 return conn;
103
104 conn = kzalloc(sizeof(struct sco_conn), GFP_ATOMIC);
105 if (!conn)
106 return NULL;
107
108 spin_lock_init(&conn->lock);
109
110 hcon->sco_data = conn;
111 conn->hcon = hcon;
112
113 conn->src = &hdev->bdaddr;
114 conn->dst = &hcon->dst;
115
116 if (hdev->sco_mtu > 0)
117 conn->mtu = hdev->sco_mtu;
118 else
119 conn->mtu = 60;
120
121 BT_DBG("hcon %p conn %p", hcon, conn);
122
123 return conn;
124}
125
126static inline struct sock *sco_chan_get(struct sco_conn *conn)
127{
128 struct sock *sk = NULL;
129 sco_conn_lock(conn);
130 sk = conn->sk;
131 sco_conn_unlock(conn);
132 return sk;
133}
134
135static int sco_conn_del(struct hci_conn *hcon, int err)
136{
137 struct sco_conn *conn = hcon->sco_data;
138 struct sock *sk;
139
140 if (!conn)
141 return 0;
142
143 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
144
145 /* Kill socket */
146 sk = sco_chan_get(conn);
147 if (sk) {
148 bh_lock_sock(sk);
149 sco_sock_clear_timer(sk);
150 sco_chan_del(sk, err);
151 bh_unlock_sock(sk);
152 sco_sock_kill(sk);
153 }
154
155 hcon->sco_data = NULL;
156 kfree(conn);
157 return 0;
158}
159
160static inline int sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent)
161{
162 int err = 0;
163
164 sco_conn_lock(conn);
165 if (conn->sk)
166 err = -EBUSY;
167 else
168 __sco_chan_add(conn, sk, parent);
169
170 sco_conn_unlock(conn);
171 return err;
172}
173
174static int sco_connect(struct sock *sk)
175{
176 bdaddr_t *src = &bt_sk(sk)->src;
177 bdaddr_t *dst = &bt_sk(sk)->dst;
178 struct sco_conn *conn;
179 struct hci_conn *hcon;
180 struct hci_dev *hdev;
181 int err, type;
182
183 BT_DBG("%s -> %s", batostr(src), batostr(dst));
184
185 hdev = hci_get_route(dst, src);
186 if (!hdev)
187 return -EHOSTUNREACH;
188
189 hci_dev_lock(hdev);
190
191 if (lmp_esco_capable(hdev) && !disable_esco)
192 type = ESCO_LINK;
193 else
194 type = SCO_LINK;
195
196 hcon = hci_connect(hdev, type, dst, BDADDR_BREDR, BT_SECURITY_LOW,
197 HCI_AT_NO_BONDING);
198 if (IS_ERR(hcon)) {
199 err = PTR_ERR(hcon);
200 goto done;
201 }
202
203 conn = sco_conn_add(hcon);
204 if (!conn) {
205 hci_conn_put(hcon);
206 err = -ENOMEM;
207 goto done;
208 }
209
210 /* Update source addr of the socket */
211 bacpy(src, conn->src);
212
213 err = sco_chan_add(conn, sk, NULL);
214 if (err)
215 goto done;
216
217 if (hcon->state == BT_CONNECTED) {
218 sco_sock_clear_timer(sk);
219 sk->sk_state = BT_CONNECTED;
220 } else {
221 sk->sk_state = BT_CONNECT;
222 sco_sock_set_timer(sk, sk->sk_sndtimeo);
223 }
224
225done:
226 hci_dev_unlock(hdev);
227 hci_dev_put(hdev);
228 return err;
229}
230
231static inline int sco_send_frame(struct sock *sk, struct msghdr *msg, int len)
232{
233 struct sco_conn *conn = sco_pi(sk)->conn;
234 struct sk_buff *skb;
235 int err;
236
237 /* Check outgoing MTU */
238 if (len > conn->mtu)
239 return -EINVAL;
240
241 BT_DBG("sk %p len %d", sk, len);
242
243 skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
244 if (!skb)
245 return err;
246
247 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
248 kfree_skb(skb);
249 return -EFAULT;
250 }
251
252 hci_send_sco(conn->hcon, skb);
253
254 return len;
255}
256
257static inline void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb)
258{
259 struct sock *sk = sco_chan_get(conn);
260
261 if (!sk)
262 goto drop;
263
264 BT_DBG("sk %p len %d", sk, skb->len);
265
266 if (sk->sk_state != BT_CONNECTED)
267 goto drop;
268
269 if (!sock_queue_rcv_skb(sk, skb))
270 return;
271
272drop:
273 kfree_skb(skb);
274}
275
276/* -------- Socket interface ---------- */
277static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba)
278{
279 struct hlist_node *node;
280 struct sock *sk;
281
282 sk_for_each(sk, node, &sco_sk_list.head) {
283 if (sk->sk_state != BT_LISTEN)
284 continue;
285
286 if (!bacmp(&bt_sk(sk)->src, ba))
287 return sk;
288 }
289
290 return NULL;
291}
292
293/* Find socket listening on source bdaddr.
294 * Returns closest match.
295 */
296static struct sock *sco_get_sock_listen(bdaddr_t *src)
297{
298 struct sock *sk = NULL, *sk1 = NULL;
299 struct hlist_node *node;
300
301 read_lock(&sco_sk_list.lock);
302
303 sk_for_each(sk, node, &sco_sk_list.head) {
304 if (sk->sk_state != BT_LISTEN)
305 continue;
306
307 /* Exact match. */
308 if (!bacmp(&bt_sk(sk)->src, src))
309 break;
310
311 /* Closest match */
312 if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY))
313 sk1 = sk;
314 }
315
316 read_unlock(&sco_sk_list.lock);
317
318 return node ? sk : sk1;
319}
320
321static void sco_sock_destruct(struct sock *sk)
322{
323 BT_DBG("sk %p", sk);
324
325 skb_queue_purge(&sk->sk_receive_queue);
326 skb_queue_purge(&sk->sk_write_queue);
327}
328
329static void sco_sock_cleanup_listen(struct sock *parent)
330{
331 struct sock *sk;
332
333 BT_DBG("parent %p", parent);
334
335 /* Close not yet accepted channels */
336 while ((sk = bt_accept_dequeue(parent, NULL))) {
337 sco_sock_close(sk);
338 sco_sock_kill(sk);
339 }
340
341 parent->sk_state = BT_CLOSED;
342 sock_set_flag(parent, SOCK_ZAPPED);
343}
344
345/* Kill socket (only if zapped and orphan)
346 * Must be called on unlocked socket.
347 */
348static void sco_sock_kill(struct sock *sk)
349{
350 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
351 return;
352
353 BT_DBG("sk %p state %d", sk, sk->sk_state);
354
355 /* Kill poor orphan */
356 bt_sock_unlink(&sco_sk_list, sk);
357 sock_set_flag(sk, SOCK_DEAD);
358 sock_put(sk);
359}
360
361static void __sco_sock_close(struct sock *sk)
362{
363 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
364
365 switch (sk->sk_state) {
366 case BT_LISTEN:
367 sco_sock_cleanup_listen(sk);
368 break;
369
370 case BT_CONNECTED:
371 case BT_CONFIG:
372 if (sco_pi(sk)->conn) {
373 sk->sk_state = BT_DISCONN;
374 sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT);
375 hci_conn_put(sco_pi(sk)->conn->hcon);
376 sco_pi(sk)->conn->hcon = NULL;
377 } else
378 sco_chan_del(sk, ECONNRESET);
379 break;
380
381 case BT_CONNECT:
382 case BT_DISCONN:
383 sco_chan_del(sk, ECONNRESET);
384 break;
385
386 default:
387 sock_set_flag(sk, SOCK_ZAPPED);
388 break;
389 }
390}
391
392/* Must be called on unlocked socket. */
393static void sco_sock_close(struct sock *sk)
394{
395 sco_sock_clear_timer(sk);
396 lock_sock(sk);
397 __sco_sock_close(sk);
398 release_sock(sk);
399 sco_sock_kill(sk);
400}
401
402static void sco_sock_init(struct sock *sk, struct sock *parent)
403{
404 BT_DBG("sk %p", sk);
405
406 if (parent) {
407 sk->sk_type = parent->sk_type;
408 security_sk_clone(parent, sk);
409 }
410}
411
412static struct proto sco_proto = {
413 .name = "SCO",
414 .owner = THIS_MODULE,
415 .obj_size = sizeof(struct sco_pinfo)
416};
417
418static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio)
419{
420 struct sock *sk;
421
422 sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto);
423 if (!sk)
424 return NULL;
425
426 sock_init_data(sock, sk);
427 INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
428
429 sk->sk_destruct = sco_sock_destruct;
430 sk->sk_sndtimeo = SCO_CONN_TIMEOUT;
431
432 sock_reset_flag(sk, SOCK_ZAPPED);
433
434 sk->sk_protocol = proto;
435 sk->sk_state = BT_OPEN;
436
437 setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk);
438
439 bt_sock_link(&sco_sk_list, sk);
440 return sk;
441}
442
443static int sco_sock_create(struct net *net, struct socket *sock, int protocol,
444 int kern)
445{
446 struct sock *sk;
447
448 BT_DBG("sock %p", sock);
449
450 sock->state = SS_UNCONNECTED;
451
452 if (sock->type != SOCK_SEQPACKET)
453 return -ESOCKTNOSUPPORT;
454
455 sock->ops = &sco_sock_ops;
456
457 sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC);
458 if (!sk)
459 return -ENOMEM;
460
461 sco_sock_init(sk, NULL);
462 return 0;
463}
464
465static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
466{
467 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
468 struct sock *sk = sock->sk;
469 int err = 0;
470
471 BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr));
472
473 if (!addr || addr->sa_family != AF_BLUETOOTH)
474 return -EINVAL;
475
476 lock_sock(sk);
477
478 if (sk->sk_state != BT_OPEN) {
479 err = -EBADFD;
480 goto done;
481 }
482
483 if (sk->sk_type != SOCK_SEQPACKET) {
484 err = -EINVAL;
485 goto done;
486 }
487
488 bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr);
489
490 sk->sk_state = BT_BOUND;
491
492done:
493 release_sock(sk);
494 return err;
495}
496
497static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
498{
499 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
500 struct sock *sk = sock->sk;
501 int err = 0;
502
503
504 BT_DBG("sk %p", sk);
505
506 if (alen < sizeof(struct sockaddr_sco) ||
507 addr->sa_family != AF_BLUETOOTH)
508 return -EINVAL;
509
510 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
511 return -EBADFD;
512
513 if (sk->sk_type != SOCK_SEQPACKET)
514 return -EINVAL;
515
516 lock_sock(sk);
517
518 /* Set destination address and psm */
519 bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr);
520
521 err = sco_connect(sk);
522 if (err)
523 goto done;
524
525 err = bt_sock_wait_state(sk, BT_CONNECTED,
526 sock_sndtimeo(sk, flags & O_NONBLOCK));
527
528done:
529 release_sock(sk);
530 return err;
531}
532
533static int sco_sock_listen(struct socket *sock, int backlog)
534{
535 struct sock *sk = sock->sk;
536 bdaddr_t *src = &bt_sk(sk)->src;
537 int err = 0;
538
539 BT_DBG("sk %p backlog %d", sk, backlog);
540
541 lock_sock(sk);
542
543 if (sk->sk_state != BT_BOUND) {
544 err = -EBADFD;
545 goto done;
546 }
547
548 if (sk->sk_type != SOCK_SEQPACKET) {
549 err = -EINVAL;
550 goto done;
551 }
552
553 write_lock(&sco_sk_list.lock);
554
555 if (__sco_get_sock_listen_by_addr(src)) {
556 err = -EADDRINUSE;
557 goto unlock;
558 }
559
560 sk->sk_max_ack_backlog = backlog;
561 sk->sk_ack_backlog = 0;
562
563 sk->sk_state = BT_LISTEN;
564
565unlock:
566 write_unlock(&sco_sk_list.lock);
567
568done:
569 release_sock(sk);
570 return err;
571}
572
573static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags)
574{
575 DECLARE_WAITQUEUE(wait, current);
576 struct sock *sk = sock->sk, *ch;
577 long timeo;
578 int err = 0;
579
580 lock_sock(sk);
581
582 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
583
584 BT_DBG("sk %p timeo %ld", sk, timeo);
585
586 /* Wait for an incoming connection. (wake-one). */
587 add_wait_queue_exclusive(sk_sleep(sk), &wait);
588 while (1) {
589 set_current_state(TASK_INTERRUPTIBLE);
590
591 if (sk->sk_state != BT_LISTEN) {
592 err = -EBADFD;
593 break;
594 }
595
596 ch = bt_accept_dequeue(sk, newsock);
597 if (ch)
598 break;
599
600 if (!timeo) {
601 err = -EAGAIN;
602 break;
603 }
604
605 if (signal_pending(current)) {
606 err = sock_intr_errno(timeo);
607 break;
608 }
609
610 release_sock(sk);
611 timeo = schedule_timeout(timeo);
612 lock_sock(sk);
613 }
614 __set_current_state(TASK_RUNNING);
615 remove_wait_queue(sk_sleep(sk), &wait);
616
617 if (err)
618 goto done;
619
620 newsock->state = SS_CONNECTED;
621
622 BT_DBG("new socket %p", ch);
623
624done:
625 release_sock(sk);
626 return err;
627}
628
629static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer)
630{
631 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
632 struct sock *sk = sock->sk;
633
634 BT_DBG("sock %p, sk %p", sock, sk);
635
636 addr->sa_family = AF_BLUETOOTH;
637 *len = sizeof(struct sockaddr_sco);
638
639 if (peer)
640 bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst);
641 else
642 bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src);
643
644 return 0;
645}
646
647static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
648 struct msghdr *msg, size_t len)
649{
650 struct sock *sk = sock->sk;
651 int err;
652
653 BT_DBG("sock %p, sk %p", sock, sk);
654
655 err = sock_error(sk);
656 if (err)
657 return err;
658
659 if (msg->msg_flags & MSG_OOB)
660 return -EOPNOTSUPP;
661
662 lock_sock(sk);
663
664 if (sk->sk_state == BT_CONNECTED)
665 err = sco_send_frame(sk, msg, len);
666 else
667 err = -ENOTCONN;
668
669 release_sock(sk);
670 return err;
671}
672
673static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen)
674{
675 struct sock *sk = sock->sk;
676 int err = 0;
677
678 BT_DBG("sk %p", sk);
679
680 lock_sock(sk);
681
682 switch (optname) {
683 default:
684 err = -ENOPROTOOPT;
685 break;
686 }
687
688 release_sock(sk);
689 return err;
690}
691
692static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen)
693{
694 struct sock *sk = sock->sk;
695 struct sco_options opts;
696 struct sco_conninfo cinfo;
697 int len, err = 0;
698
699 BT_DBG("sk %p", sk);
700
701 if (get_user(len, optlen))
702 return -EFAULT;
703
704 lock_sock(sk);
705
706 switch (optname) {
707 case SCO_OPTIONS:
708 if (sk->sk_state != BT_CONNECTED) {
709 err = -ENOTCONN;
710 break;
711 }
712
713 opts.mtu = sco_pi(sk)->conn->mtu;
714
715 BT_DBG("mtu %d", opts.mtu);
716
717 len = min_t(unsigned int, len, sizeof(opts));
718 if (copy_to_user(optval, (char *)&opts, len))
719 err = -EFAULT;
720
721 break;
722
723 case SCO_CONNINFO:
724 if (sk->sk_state != BT_CONNECTED) {
725 err = -ENOTCONN;
726 break;
727 }
728
729 memset(&cinfo, 0, sizeof(cinfo));
730 cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle;
731 memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3);
732
733 len = min_t(unsigned int, len, sizeof(cinfo));
734 if (copy_to_user(optval, (char *)&cinfo, len))
735 err = -EFAULT;
736
737 break;
738
739 default:
740 err = -ENOPROTOOPT;
741 break;
742 }
743
744 release_sock(sk);
745 return err;
746}
747
748static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
749{
750 struct sock *sk = sock->sk;
751 int len, err = 0;
752
753 BT_DBG("sk %p", sk);
754
755 if (level == SOL_SCO)
756 return sco_sock_getsockopt_old(sock, optname, optval, optlen);
757
758 if (get_user(len, optlen))
759 return -EFAULT;
760
761 lock_sock(sk);
762
763 switch (optname) {
764 default:
765 err = -ENOPROTOOPT;
766 break;
767 }
768
769 release_sock(sk);
770 return err;
771}
772
773static int sco_sock_shutdown(struct socket *sock, int how)
774{
775 struct sock *sk = sock->sk;
776 int err = 0;
777
778 BT_DBG("sock %p, sk %p", sock, sk);
779
780 if (!sk)
781 return 0;
782
783 lock_sock(sk);
784 if (!sk->sk_shutdown) {
785 sk->sk_shutdown = SHUTDOWN_MASK;
786 sco_sock_clear_timer(sk);
787 __sco_sock_close(sk);
788
789 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime)
790 err = bt_sock_wait_state(sk, BT_CLOSED,
791 sk->sk_lingertime);
792 }
793 release_sock(sk);
794 return err;
795}
796
797static int sco_sock_release(struct socket *sock)
798{
799 struct sock *sk = sock->sk;
800 int err = 0;
801
802 BT_DBG("sock %p, sk %p", sock, sk);
803
804 if (!sk)
805 return 0;
806
807 sco_sock_close(sk);
808
809 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) {
810 lock_sock(sk);
811 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
812 release_sock(sk);
813 }
814
815 sock_orphan(sk);
816 sco_sock_kill(sk);
817 return err;
818}
819
820static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent)
821{
822 BT_DBG("conn %p", conn);
823
824 sco_pi(sk)->conn = conn;
825 conn->sk = sk;
826
827 if (parent)
828 bt_accept_enqueue(parent, sk);
829}
830
831/* Delete channel.
832 * Must be called on the locked socket. */
833static void sco_chan_del(struct sock *sk, int err)
834{
835 struct sco_conn *conn;
836
837 conn = sco_pi(sk)->conn;
838
839 BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
840
841 if (conn) {
842 sco_conn_lock(conn);
843 conn->sk = NULL;
844 sco_pi(sk)->conn = NULL;
845 sco_conn_unlock(conn);
846
847 if (conn->hcon)
848 hci_conn_put(conn->hcon);
849 }
850
851 sk->sk_state = BT_CLOSED;
852 sk->sk_err = err;
853 sk->sk_state_change(sk);
854
855 sock_set_flag(sk, SOCK_ZAPPED);
856}
857
858static void sco_conn_ready(struct sco_conn *conn)
859{
860 struct sock *parent;
861 struct sock *sk = conn->sk;
862
863 BT_DBG("conn %p", conn);
864
865 sco_conn_lock(conn);
866
867 if (sk) {
868 sco_sock_clear_timer(sk);
869 bh_lock_sock(sk);
870 sk->sk_state = BT_CONNECTED;
871 sk->sk_state_change(sk);
872 bh_unlock_sock(sk);
873 } else {
874 parent = sco_get_sock_listen(conn->src);
875 if (!parent)
876 goto done;
877
878 bh_lock_sock(parent);
879
880 sk = sco_sock_alloc(sock_net(parent), NULL,
881 BTPROTO_SCO, GFP_ATOMIC);
882 if (!sk) {
883 bh_unlock_sock(parent);
884 goto done;
885 }
886
887 sco_sock_init(sk, parent);
888
889 bacpy(&bt_sk(sk)->src, conn->src);
890 bacpy(&bt_sk(sk)->dst, conn->dst);
891
892 hci_conn_hold(conn->hcon);
893 __sco_chan_add(conn, sk, parent);
894
895 sk->sk_state = BT_CONNECTED;
896
897 /* Wake up parent */
898 parent->sk_data_ready(parent, 1);
899
900 bh_unlock_sock(parent);
901 }
902
903done:
904 sco_conn_unlock(conn);
905}
906
907/* ----- SCO interface with lower layer (HCI) ----- */
908int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr)
909{
910 register struct sock *sk;
911 struct hlist_node *node;
912 int lm = 0;
913
914 BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr));
915
916 /* Find listening sockets */
917 read_lock(&sco_sk_list.lock);
918 sk_for_each(sk, node, &sco_sk_list.head) {
919 if (sk->sk_state != BT_LISTEN)
920 continue;
921
922 if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr) ||
923 !bacmp(&bt_sk(sk)->src, BDADDR_ANY)) {
924 lm |= HCI_LM_ACCEPT;
925 break;
926 }
927 }
928 read_unlock(&sco_sk_list.lock);
929
930 return lm;
931}
932
933int sco_connect_cfm(struct hci_conn *hcon, __u8 status)
934{
935 BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status);
936 if (!status) {
937 struct sco_conn *conn;
938
939 conn = sco_conn_add(hcon);
940 if (conn)
941 sco_conn_ready(conn);
942 } else
943 sco_conn_del(hcon, bt_to_errno(status));
944
945 return 0;
946}
947
948int sco_disconn_cfm(struct hci_conn *hcon, __u8 reason)
949{
950 BT_DBG("hcon %p reason %d", hcon, reason);
951
952 sco_conn_del(hcon, bt_to_errno(reason));
953 return 0;
954}
955
956int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
957{
958 struct sco_conn *conn = hcon->sco_data;
959
960 if (!conn)
961 goto drop;
962
963 BT_DBG("conn %p len %d", conn, skb->len);
964
965 if (skb->len) {
966 sco_recv_frame(conn, skb);
967 return 0;
968 }
969
970drop:
971 kfree_skb(skb);
972 return 0;
973}
974
975static int sco_debugfs_show(struct seq_file *f, void *p)
976{
977 struct sock *sk;
978 struct hlist_node *node;
979
980 read_lock(&sco_sk_list.lock);
981
982 sk_for_each(sk, node, &sco_sk_list.head) {
983 seq_printf(f, "%s %s %d\n", batostr(&bt_sk(sk)->src),
984 batostr(&bt_sk(sk)->dst), sk->sk_state);
985 }
986
987 read_unlock(&sco_sk_list.lock);
988
989 return 0;
990}
991
992static int sco_debugfs_open(struct inode *inode, struct file *file)
993{
994 return single_open(file, sco_debugfs_show, inode->i_private);
995}
996
997static const struct file_operations sco_debugfs_fops = {
998 .open = sco_debugfs_open,
999 .read = seq_read,
1000 .llseek = seq_lseek,
1001 .release = single_release,
1002};
1003
1004static struct dentry *sco_debugfs;
1005
1006static const struct proto_ops sco_sock_ops = {
1007 .family = PF_BLUETOOTH,
1008 .owner = THIS_MODULE,
1009 .release = sco_sock_release,
1010 .bind = sco_sock_bind,
1011 .connect = sco_sock_connect,
1012 .listen = sco_sock_listen,
1013 .accept = sco_sock_accept,
1014 .getname = sco_sock_getname,
1015 .sendmsg = sco_sock_sendmsg,
1016 .recvmsg = bt_sock_recvmsg,
1017 .poll = bt_sock_poll,
1018 .ioctl = bt_sock_ioctl,
1019 .mmap = sock_no_mmap,
1020 .socketpair = sock_no_socketpair,
1021 .shutdown = sco_sock_shutdown,
1022 .setsockopt = sco_sock_setsockopt,
1023 .getsockopt = sco_sock_getsockopt
1024};
1025
1026static const struct net_proto_family sco_sock_family_ops = {
1027 .family = PF_BLUETOOTH,
1028 .owner = THIS_MODULE,
1029 .create = sco_sock_create,
1030};
1031
1032int __init sco_init(void)
1033{
1034 int err;
1035
1036 err = proto_register(&sco_proto, 0);
1037 if (err < 0)
1038 return err;
1039
1040 err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops);
1041 if (err < 0) {
1042 BT_ERR("SCO socket registration failed");
1043 goto error;
1044 }
1045
1046 if (bt_debugfs) {
1047 sco_debugfs = debugfs_create_file("sco", 0444,
1048 bt_debugfs, NULL, &sco_debugfs_fops);
1049 if (!sco_debugfs)
1050 BT_ERR("Failed to create SCO debug file");
1051 }
1052
1053 BT_INFO("SCO socket layer initialized");
1054
1055 return 0;
1056
1057error:
1058 proto_unregister(&sco_proto);
1059 return err;
1060}
1061
1062void __exit sco_exit(void)
1063{
1064 debugfs_remove(sco_debugfs);
1065
1066 if (bt_sock_unregister(BTPROTO_SCO) < 0)
1067 BT_ERR("SCO socket unregistration failed");
1068
1069 proto_unregister(&sco_proto);
1070}
1071
1072module_param(disable_esco, bool, 0644);
1073MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation");