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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
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);
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");
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 struct kref ref;
55};
56
57#define sco_conn_lock(c) spin_lock(&c->lock)
58#define sco_conn_unlock(c) spin_unlock(&c->lock)
59
60static void sco_sock_close(struct sock *sk);
61static void sco_sock_kill(struct sock *sk);
62
63/* ----- SCO socket info ----- */
64#define sco_pi(sk) ((struct sco_pinfo *) sk)
65
66struct sco_pinfo {
67 struct bt_sock bt;
68 bdaddr_t src;
69 bdaddr_t dst;
70 __u32 flags;
71 __u16 setting;
72 struct bt_codec codec;
73 struct sco_conn *conn;
74};
75
76/* ---- SCO timers ---- */
77#define SCO_CONN_TIMEOUT (HZ * 40)
78#define SCO_DISCONN_TIMEOUT (HZ * 2)
79
80static void sco_conn_free(struct kref *ref)
81{
82 struct sco_conn *conn = container_of(ref, struct sco_conn, ref);
83
84 BT_DBG("conn %p", conn);
85
86 if (conn->sk)
87 sco_pi(conn->sk)->conn = NULL;
88
89 if (conn->hcon) {
90 conn->hcon->sco_data = NULL;
91 hci_conn_drop(conn->hcon);
92 }
93
94 /* Ensure no more work items will run since hci_conn has been dropped */
95 disable_delayed_work_sync(&conn->timeout_work);
96
97 kfree(conn);
98}
99
100static void sco_conn_put(struct sco_conn *conn)
101{
102 if (!conn)
103 return;
104
105 BT_DBG("conn %p refcnt %d", conn, kref_read(&conn->ref));
106
107 kref_put(&conn->ref, sco_conn_free);
108}
109
110static struct sco_conn *sco_conn_hold_unless_zero(struct sco_conn *conn)
111{
112 if (!conn)
113 return NULL;
114
115 BT_DBG("conn %p refcnt %u", conn, kref_read(&conn->ref));
116
117 if (!kref_get_unless_zero(&conn->ref))
118 return NULL;
119
120 return conn;
121}
122
123static struct sock *sco_sock_hold(struct sco_conn *conn)
124{
125 if (!conn || !bt_sock_linked(&sco_sk_list, conn->sk))
126 return NULL;
127
128 sock_hold(conn->sk);
129
130 return conn->sk;
131}
132
133static void sco_sock_timeout(struct work_struct *work)
134{
135 struct sco_conn *conn = container_of(work, struct sco_conn,
136 timeout_work.work);
137 struct sock *sk;
138
139 conn = sco_conn_hold_unless_zero(conn);
140 if (!conn)
141 return;
142
143 sco_conn_lock(conn);
144 if (!conn->hcon) {
145 sco_conn_unlock(conn);
146 sco_conn_put(conn);
147 return;
148 }
149 sk = sco_sock_hold(conn);
150 sco_conn_unlock(conn);
151 sco_conn_put(conn);
152
153 if (!sk)
154 return;
155
156 BT_DBG("sock %p state %d", sk, sk->sk_state);
157
158 lock_sock(sk);
159 sk->sk_err = ETIMEDOUT;
160 sk->sk_state_change(sk);
161 release_sock(sk);
162 sock_put(sk);
163}
164
165static void sco_sock_set_timer(struct sock *sk, long timeout)
166{
167 if (!sco_pi(sk)->conn)
168 return;
169
170 BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
171 cancel_delayed_work(&sco_pi(sk)->conn->timeout_work);
172 schedule_delayed_work(&sco_pi(sk)->conn->timeout_work, timeout);
173}
174
175static void sco_sock_clear_timer(struct sock *sk)
176{
177 if (!sco_pi(sk)->conn)
178 return;
179
180 BT_DBG("sock %p state %d", sk, sk->sk_state);
181 cancel_delayed_work(&sco_pi(sk)->conn->timeout_work);
182}
183
184/* ---- SCO connections ---- */
185static struct sco_conn *sco_conn_add(struct hci_conn *hcon)
186{
187 struct sco_conn *conn = hcon->sco_data;
188
189 conn = sco_conn_hold_unless_zero(conn);
190 if (conn) {
191 if (!conn->hcon) {
192 sco_conn_lock(conn);
193 conn->hcon = hcon;
194 sco_conn_unlock(conn);
195 }
196 return conn;
197 }
198
199 conn = kzalloc(sizeof(struct sco_conn), GFP_KERNEL);
200 if (!conn)
201 return NULL;
202
203 kref_init(&conn->ref);
204 spin_lock_init(&conn->lock);
205 INIT_DELAYED_WORK(&conn->timeout_work, sco_sock_timeout);
206
207 hcon->sco_data = conn;
208 conn->hcon = hcon;
209 conn->mtu = hcon->mtu;
210
211 if (hcon->mtu > 0)
212 conn->mtu = hcon->mtu;
213 else
214 conn->mtu = 60;
215
216 BT_DBG("hcon %p conn %p", hcon, conn);
217
218 return conn;
219}
220
221/* Delete channel.
222 * Must be called on the locked socket. */
223static void sco_chan_del(struct sock *sk, int err)
224{
225 struct sco_conn *conn;
226
227 conn = sco_pi(sk)->conn;
228 sco_pi(sk)->conn = NULL;
229
230 BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
231
232 if (conn) {
233 sco_conn_lock(conn);
234 conn->sk = NULL;
235 sco_conn_unlock(conn);
236 sco_conn_put(conn);
237 }
238
239 sk->sk_state = BT_CLOSED;
240 sk->sk_err = err;
241 sk->sk_state_change(sk);
242
243 sock_set_flag(sk, SOCK_ZAPPED);
244}
245
246static void sco_conn_del(struct hci_conn *hcon, int err)
247{
248 struct sco_conn *conn = hcon->sco_data;
249 struct sock *sk;
250
251 conn = sco_conn_hold_unless_zero(conn);
252 if (!conn)
253 return;
254
255 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
256
257 sco_conn_lock(conn);
258 sk = sco_sock_hold(conn);
259 sco_conn_unlock(conn);
260 sco_conn_put(conn);
261
262 if (!sk) {
263 sco_conn_put(conn);
264 return;
265 }
266
267 /* Kill socket */
268 lock_sock(sk);
269 sco_sock_clear_timer(sk);
270 sco_chan_del(sk, err);
271 release_sock(sk);
272 sock_put(sk);
273}
274
275static void __sco_chan_add(struct sco_conn *conn, struct sock *sk,
276 struct sock *parent)
277{
278 BT_DBG("conn %p", conn);
279
280 sco_pi(sk)->conn = conn;
281 conn->sk = sk;
282
283 if (parent)
284 bt_accept_enqueue(parent, sk, true);
285}
286
287static int sco_chan_add(struct sco_conn *conn, struct sock *sk,
288 struct sock *parent)
289{
290 int err = 0;
291
292 sco_conn_lock(conn);
293 if (conn->sk)
294 err = -EBUSY;
295 else
296 __sco_chan_add(conn, sk, parent);
297
298 sco_conn_unlock(conn);
299 return err;
300}
301
302static int sco_connect(struct sock *sk)
303{
304 struct sco_conn *conn;
305 struct hci_conn *hcon;
306 struct hci_dev *hdev;
307 int err, type;
308
309 BT_DBG("%pMR -> %pMR", &sco_pi(sk)->src, &sco_pi(sk)->dst);
310
311 hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src, BDADDR_BREDR);
312 if (!hdev)
313 return -EHOSTUNREACH;
314
315 hci_dev_lock(hdev);
316
317 if (lmp_esco_capable(hdev) && !disable_esco)
318 type = ESCO_LINK;
319 else
320 type = SCO_LINK;
321
322 switch (sco_pi(sk)->setting & SCO_AIRMODE_MASK) {
323 case SCO_AIRMODE_TRANSP:
324 if (!lmp_transp_capable(hdev) || !lmp_esco_capable(hdev)) {
325 err = -EOPNOTSUPP;
326 goto unlock;
327 }
328 break;
329 }
330
331 hcon = hci_connect_sco(hdev, type, &sco_pi(sk)->dst,
332 sco_pi(sk)->setting, &sco_pi(sk)->codec,
333 sk->sk_sndtimeo);
334 if (IS_ERR(hcon)) {
335 err = PTR_ERR(hcon);
336 goto unlock;
337 }
338
339 conn = sco_conn_add(hcon);
340 if (!conn) {
341 hci_conn_drop(hcon);
342 err = -ENOMEM;
343 goto unlock;
344 }
345
346 lock_sock(sk);
347
348 err = sco_chan_add(conn, sk, NULL);
349 if (err) {
350 release_sock(sk);
351 goto unlock;
352 }
353
354 /* Update source addr of the socket */
355 bacpy(&sco_pi(sk)->src, &hcon->src);
356
357 if (hcon->state == BT_CONNECTED) {
358 sco_sock_clear_timer(sk);
359 sk->sk_state = BT_CONNECTED;
360 } else {
361 sk->sk_state = BT_CONNECT;
362 sco_sock_set_timer(sk, sk->sk_sndtimeo);
363 }
364
365 release_sock(sk);
366
367unlock:
368 hci_dev_unlock(hdev);
369 hci_dev_put(hdev);
370 return err;
371}
372
373static int sco_send_frame(struct sock *sk, struct sk_buff *skb)
374{
375 struct sco_conn *conn = sco_pi(sk)->conn;
376 int len = skb->len;
377
378 /* Check outgoing MTU */
379 if (len > conn->mtu)
380 return -EINVAL;
381
382 BT_DBG("sk %p len %d", sk, len);
383
384 hci_send_sco(conn->hcon, skb);
385
386 return len;
387}
388
389static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb)
390{
391 struct sock *sk;
392
393 sco_conn_lock(conn);
394 sk = conn->sk;
395 sco_conn_unlock(conn);
396
397 if (!sk)
398 goto drop;
399
400 BT_DBG("sk %p len %u", sk, skb->len);
401
402 if (sk->sk_state != BT_CONNECTED)
403 goto drop;
404
405 if (!sock_queue_rcv_skb(sk, skb))
406 return;
407
408drop:
409 kfree_skb(skb);
410}
411
412/* -------- Socket interface ---------- */
413static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba)
414{
415 struct sock *sk;
416
417 sk_for_each(sk, &sco_sk_list.head) {
418 if (sk->sk_state != BT_LISTEN)
419 continue;
420
421 if (!bacmp(&sco_pi(sk)->src, ba))
422 return sk;
423 }
424
425 return NULL;
426}
427
428/* Find socket listening on source bdaddr.
429 * Returns closest match.
430 */
431static struct sock *sco_get_sock_listen(bdaddr_t *src)
432{
433 struct sock *sk = NULL, *sk1 = NULL;
434
435 read_lock(&sco_sk_list.lock);
436
437 sk_for_each(sk, &sco_sk_list.head) {
438 if (sk->sk_state != BT_LISTEN)
439 continue;
440
441 /* Exact match. */
442 if (!bacmp(&sco_pi(sk)->src, src))
443 break;
444
445 /* Closest match */
446 if (!bacmp(&sco_pi(sk)->src, BDADDR_ANY))
447 sk1 = sk;
448 }
449
450 read_unlock(&sco_sk_list.lock);
451
452 return sk ? sk : sk1;
453}
454
455static void sco_sock_destruct(struct sock *sk)
456{
457 BT_DBG("sk %p", sk);
458
459 sco_conn_put(sco_pi(sk)->conn);
460
461 skb_queue_purge(&sk->sk_receive_queue);
462 skb_queue_purge(&sk->sk_write_queue);
463}
464
465static void sco_sock_cleanup_listen(struct sock *parent)
466{
467 struct sock *sk;
468
469 BT_DBG("parent %p", parent);
470
471 /* Close not yet accepted channels */
472 while ((sk = bt_accept_dequeue(parent, NULL))) {
473 sco_sock_close(sk);
474 sco_sock_kill(sk);
475 }
476
477 parent->sk_state = BT_CLOSED;
478 sock_set_flag(parent, SOCK_ZAPPED);
479}
480
481/* Kill socket (only if zapped and orphan)
482 * Must be called on unlocked socket.
483 */
484static void sco_sock_kill(struct sock *sk)
485{
486 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
487 return;
488
489 BT_DBG("sk %p state %d", sk, sk->sk_state);
490
491 /* Kill poor orphan */
492 bt_sock_unlink(&sco_sk_list, sk);
493 sock_set_flag(sk, SOCK_DEAD);
494 sock_put(sk);
495}
496
497static void __sco_sock_close(struct sock *sk)
498{
499 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
500
501 switch (sk->sk_state) {
502 case BT_LISTEN:
503 sco_sock_cleanup_listen(sk);
504 break;
505
506 case BT_CONNECTED:
507 case BT_CONFIG:
508 case BT_CONNECT2:
509 case BT_CONNECT:
510 case BT_DISCONN:
511 sco_chan_del(sk, ECONNRESET);
512 break;
513
514 default:
515 sock_set_flag(sk, SOCK_ZAPPED);
516 break;
517 }
518
519}
520
521/* Must be called on unlocked socket. */
522static void sco_sock_close(struct sock *sk)
523{
524 lock_sock(sk);
525 sco_sock_clear_timer(sk);
526 __sco_sock_close(sk);
527 release_sock(sk);
528}
529
530static void sco_sock_init(struct sock *sk, struct sock *parent)
531{
532 BT_DBG("sk %p", sk);
533
534 if (parent) {
535 sk->sk_type = parent->sk_type;
536 bt_sk(sk)->flags = bt_sk(parent)->flags;
537 security_sk_clone(parent, sk);
538 }
539}
540
541static struct proto sco_proto = {
542 .name = "SCO",
543 .owner = THIS_MODULE,
544 .obj_size = sizeof(struct sco_pinfo)
545};
546
547static struct sock *sco_sock_alloc(struct net *net, struct socket *sock,
548 int proto, gfp_t prio, int kern)
549{
550 struct sock *sk;
551
552 sk = bt_sock_alloc(net, sock, &sco_proto, proto, prio, kern);
553 if (!sk)
554 return NULL;
555
556 sk->sk_destruct = sco_sock_destruct;
557 sk->sk_sndtimeo = SCO_CONN_TIMEOUT;
558
559 sco_pi(sk)->setting = BT_VOICE_CVSD_16BIT;
560 sco_pi(sk)->codec.id = BT_CODEC_CVSD;
561 sco_pi(sk)->codec.cid = 0xffff;
562 sco_pi(sk)->codec.vid = 0xffff;
563 sco_pi(sk)->codec.data_path = 0x00;
564
565 bt_sock_link(&sco_sk_list, sk);
566 return sk;
567}
568
569static int sco_sock_create(struct net *net, struct socket *sock, int protocol,
570 int kern)
571{
572 struct sock *sk;
573
574 BT_DBG("sock %p", sock);
575
576 sock->state = SS_UNCONNECTED;
577
578 if (sock->type != SOCK_SEQPACKET)
579 return -ESOCKTNOSUPPORT;
580
581 sock->ops = &sco_sock_ops;
582
583 sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
584 if (!sk)
585 return -ENOMEM;
586
587 sco_sock_init(sk, NULL);
588 return 0;
589}
590
591static int sco_sock_bind(struct socket *sock, struct sockaddr *addr,
592 int addr_len)
593{
594 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
595 struct sock *sk = sock->sk;
596 int err = 0;
597
598 if (!addr || addr_len < sizeof(struct sockaddr_sco) ||
599 addr->sa_family != AF_BLUETOOTH)
600 return -EINVAL;
601
602 BT_DBG("sk %p %pMR", sk, &sa->sco_bdaddr);
603
604 lock_sock(sk);
605
606 if (sk->sk_state != BT_OPEN) {
607 err = -EBADFD;
608 goto done;
609 }
610
611 if (sk->sk_type != SOCK_SEQPACKET) {
612 err = -EINVAL;
613 goto done;
614 }
615
616 bacpy(&sco_pi(sk)->src, &sa->sco_bdaddr);
617
618 sk->sk_state = BT_BOUND;
619
620done:
621 release_sock(sk);
622 return err;
623}
624
625static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
626{
627 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
628 struct sock *sk = sock->sk;
629 int err;
630
631 BT_DBG("sk %p", sk);
632
633 if (alen < sizeof(struct sockaddr_sco) ||
634 addr->sa_family != AF_BLUETOOTH)
635 return -EINVAL;
636
637 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
638 return -EBADFD;
639
640 if (sk->sk_type != SOCK_SEQPACKET)
641 err = -EINVAL;
642
643 lock_sock(sk);
644 /* Set destination address and psm */
645 bacpy(&sco_pi(sk)->dst, &sa->sco_bdaddr);
646 release_sock(sk);
647
648 err = sco_connect(sk);
649 if (err)
650 return err;
651
652 lock_sock(sk);
653
654 err = bt_sock_wait_state(sk, BT_CONNECTED,
655 sock_sndtimeo(sk, flags & O_NONBLOCK));
656
657 release_sock(sk);
658 return err;
659}
660
661static int sco_sock_listen(struct socket *sock, int backlog)
662{
663 struct sock *sk = sock->sk;
664 bdaddr_t *src = &sco_pi(sk)->src;
665 int err = 0;
666
667 BT_DBG("sk %p backlog %d", sk, backlog);
668
669 lock_sock(sk);
670
671 if (sk->sk_state != BT_BOUND) {
672 err = -EBADFD;
673 goto done;
674 }
675
676 if (sk->sk_type != SOCK_SEQPACKET) {
677 err = -EINVAL;
678 goto done;
679 }
680
681 write_lock(&sco_sk_list.lock);
682
683 if (__sco_get_sock_listen_by_addr(src)) {
684 err = -EADDRINUSE;
685 goto unlock;
686 }
687
688 sk->sk_max_ack_backlog = backlog;
689 sk->sk_ack_backlog = 0;
690
691 sk->sk_state = BT_LISTEN;
692
693unlock:
694 write_unlock(&sco_sk_list.lock);
695
696done:
697 release_sock(sk);
698 return err;
699}
700
701static int sco_sock_accept(struct socket *sock, struct socket *newsock,
702 struct proto_accept_arg *arg)
703{
704 DEFINE_WAIT_FUNC(wait, woken_wake_function);
705 struct sock *sk = sock->sk, *ch;
706 long timeo;
707 int err = 0;
708
709 lock_sock(sk);
710
711 timeo = sock_rcvtimeo(sk, arg->flags & O_NONBLOCK);
712
713 BT_DBG("sk %p timeo %ld", sk, timeo);
714
715 /* Wait for an incoming connection. (wake-one). */
716 add_wait_queue_exclusive(sk_sleep(sk), &wait);
717 while (1) {
718 if (sk->sk_state != BT_LISTEN) {
719 err = -EBADFD;
720 break;
721 }
722
723 ch = bt_accept_dequeue(sk, newsock);
724 if (ch)
725 break;
726
727 if (!timeo) {
728 err = -EAGAIN;
729 break;
730 }
731
732 if (signal_pending(current)) {
733 err = sock_intr_errno(timeo);
734 break;
735 }
736
737 release_sock(sk);
738
739 timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);
740 lock_sock(sk);
741 }
742 remove_wait_queue(sk_sleep(sk), &wait);
743
744 if (err)
745 goto done;
746
747 newsock->state = SS_CONNECTED;
748
749 BT_DBG("new socket %p", ch);
750
751done:
752 release_sock(sk);
753 return err;
754}
755
756static int sco_sock_getname(struct socket *sock, struct sockaddr *addr,
757 int peer)
758{
759 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
760 struct sock *sk = sock->sk;
761
762 BT_DBG("sock %p, sk %p", sock, sk);
763
764 addr->sa_family = AF_BLUETOOTH;
765
766 if (peer)
767 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->dst);
768 else
769 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->src);
770
771 return sizeof(struct sockaddr_sco);
772}
773
774static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg,
775 size_t len)
776{
777 struct sock *sk = sock->sk;
778 struct sk_buff *skb;
779 int err;
780
781 BT_DBG("sock %p, sk %p", sock, sk);
782
783 err = sock_error(sk);
784 if (err)
785 return err;
786
787 if (msg->msg_flags & MSG_OOB)
788 return -EOPNOTSUPP;
789
790 skb = bt_skb_sendmsg(sk, msg, len, len, 0, 0);
791 if (IS_ERR(skb))
792 return PTR_ERR(skb);
793
794 lock_sock(sk);
795
796 if (sk->sk_state == BT_CONNECTED)
797 err = sco_send_frame(sk, skb);
798 else
799 err = -ENOTCONN;
800
801 release_sock(sk);
802
803 if (err < 0)
804 kfree_skb(skb);
805 return err;
806}
807
808static void sco_conn_defer_accept(struct hci_conn *conn, u16 setting)
809{
810 struct hci_dev *hdev = conn->hdev;
811
812 BT_DBG("conn %p", conn);
813
814 conn->state = BT_CONFIG;
815
816 if (!lmp_esco_capable(hdev)) {
817 struct hci_cp_accept_conn_req cp;
818
819 bacpy(&cp.bdaddr, &conn->dst);
820 cp.role = 0x00; /* Ignored */
821
822 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
823 } else {
824 struct hci_cp_accept_sync_conn_req cp;
825
826 bacpy(&cp.bdaddr, &conn->dst);
827 cp.pkt_type = cpu_to_le16(conn->pkt_type);
828
829 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
830 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
831 cp.content_format = cpu_to_le16(setting);
832
833 switch (setting & SCO_AIRMODE_MASK) {
834 case SCO_AIRMODE_TRANSP:
835 if (conn->pkt_type & ESCO_2EV3)
836 cp.max_latency = cpu_to_le16(0x0008);
837 else
838 cp.max_latency = cpu_to_le16(0x000D);
839 cp.retrans_effort = 0x02;
840 break;
841 case SCO_AIRMODE_CVSD:
842 cp.max_latency = cpu_to_le16(0xffff);
843 cp.retrans_effort = 0xff;
844 break;
845 default:
846 /* use CVSD settings as fallback */
847 cp.max_latency = cpu_to_le16(0xffff);
848 cp.retrans_effort = 0xff;
849 break;
850 }
851
852 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ,
853 sizeof(cp), &cp);
854 }
855}
856
857static int sco_sock_recvmsg(struct socket *sock, struct msghdr *msg,
858 size_t len, int flags)
859{
860 struct sock *sk = sock->sk;
861 struct sco_pinfo *pi = sco_pi(sk);
862
863 lock_sock(sk);
864
865 if (sk->sk_state == BT_CONNECT2 &&
866 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
867 sco_conn_defer_accept(pi->conn->hcon, pi->setting);
868 sk->sk_state = BT_CONFIG;
869
870 release_sock(sk);
871 return 0;
872 }
873
874 release_sock(sk);
875
876 return bt_sock_recvmsg(sock, msg, len, flags);
877}
878
879static int sco_sock_setsockopt(struct socket *sock, int level, int optname,
880 sockptr_t optval, unsigned int optlen)
881{
882 struct sock *sk = sock->sk;
883 int err = 0;
884 struct bt_voice voice;
885 u32 opt;
886 struct bt_codecs *codecs;
887 struct hci_dev *hdev;
888 __u8 buffer[255];
889
890 BT_DBG("sk %p", sk);
891
892 lock_sock(sk);
893
894 switch (optname) {
895
896 case BT_DEFER_SETUP:
897 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
898 err = -EINVAL;
899 break;
900 }
901
902 err = copy_safe_from_sockptr(&opt, sizeof(opt), optval, optlen);
903 if (err)
904 break;
905
906 if (opt)
907 set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
908 else
909 clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
910 break;
911
912 case BT_VOICE:
913 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
914 sk->sk_state != BT_CONNECT2) {
915 err = -EINVAL;
916 break;
917 }
918
919 voice.setting = sco_pi(sk)->setting;
920
921 err = copy_safe_from_sockptr(&voice, sizeof(voice), optval,
922 optlen);
923 if (err)
924 break;
925
926 sco_pi(sk)->setting = voice.setting;
927 hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src,
928 BDADDR_BREDR);
929 if (!hdev) {
930 err = -EBADFD;
931 break;
932 }
933
934 switch (sco_pi(sk)->setting & SCO_AIRMODE_MASK) {
935 case SCO_AIRMODE_TRANSP:
936 if (enhanced_sync_conn_capable(hdev))
937 sco_pi(sk)->codec.id = BT_CODEC_TRANSPARENT;
938 break;
939 }
940
941 hci_dev_put(hdev);
942 break;
943
944 case BT_PKT_STATUS:
945 err = copy_safe_from_sockptr(&opt, sizeof(opt), optval, optlen);
946 if (err)
947 break;
948
949 if (opt)
950 set_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags);
951 else
952 clear_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags);
953 break;
954
955 case BT_CODEC:
956 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
957 sk->sk_state != BT_CONNECT2) {
958 err = -EINVAL;
959 break;
960 }
961
962 hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src,
963 BDADDR_BREDR);
964 if (!hdev) {
965 err = -EBADFD;
966 break;
967 }
968
969 if (!hci_dev_test_flag(hdev, HCI_OFFLOAD_CODECS_ENABLED)) {
970 hci_dev_put(hdev);
971 err = -EOPNOTSUPP;
972 break;
973 }
974
975 if (!hdev->get_data_path_id) {
976 hci_dev_put(hdev);
977 err = -EOPNOTSUPP;
978 break;
979 }
980
981 if (optlen < sizeof(struct bt_codecs) ||
982 optlen > sizeof(buffer)) {
983 hci_dev_put(hdev);
984 err = -EINVAL;
985 break;
986 }
987
988 err = copy_struct_from_sockptr(buffer, sizeof(buffer), optval,
989 optlen);
990 if (err) {
991 hci_dev_put(hdev);
992 break;
993 }
994
995 codecs = (void *)buffer;
996
997 if (codecs->num_codecs > 1) {
998 hci_dev_put(hdev);
999 err = -EINVAL;
1000 break;
1001 }
1002
1003 sco_pi(sk)->codec = codecs->codecs[0];
1004 hci_dev_put(hdev);
1005 break;
1006
1007 default:
1008 err = -ENOPROTOOPT;
1009 break;
1010 }
1011
1012 release_sock(sk);
1013 return err;
1014}
1015
1016static int sco_sock_getsockopt_old(struct socket *sock, int optname,
1017 char __user *optval, int __user *optlen)
1018{
1019 struct sock *sk = sock->sk;
1020 struct sco_options opts;
1021 struct sco_conninfo cinfo;
1022 int err = 0;
1023 size_t len;
1024
1025 BT_DBG("sk %p", sk);
1026
1027 if (get_user(len, optlen))
1028 return -EFAULT;
1029
1030 lock_sock(sk);
1031
1032 switch (optname) {
1033 case SCO_OPTIONS:
1034 if (sk->sk_state != BT_CONNECTED &&
1035 !(sk->sk_state == BT_CONNECT2 &&
1036 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
1037 err = -ENOTCONN;
1038 break;
1039 }
1040
1041 opts.mtu = sco_pi(sk)->conn->mtu;
1042
1043 BT_DBG("mtu %u", opts.mtu);
1044
1045 len = min(len, sizeof(opts));
1046 if (copy_to_user(optval, (char *)&opts, len))
1047 err = -EFAULT;
1048
1049 break;
1050
1051 case SCO_CONNINFO:
1052 if (sk->sk_state != BT_CONNECTED &&
1053 !(sk->sk_state == BT_CONNECT2 &&
1054 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
1055 err = -ENOTCONN;
1056 break;
1057 }
1058
1059 memset(&cinfo, 0, sizeof(cinfo));
1060 cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle;
1061 memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3);
1062
1063 len = min(len, sizeof(cinfo));
1064 if (copy_to_user(optval, (char *)&cinfo, len))
1065 err = -EFAULT;
1066
1067 break;
1068
1069 default:
1070 err = -ENOPROTOOPT;
1071 break;
1072 }
1073
1074 release_sock(sk);
1075 return err;
1076}
1077
1078static int sco_sock_getsockopt(struct socket *sock, int level, int optname,
1079 char __user *optval, int __user *optlen)
1080{
1081 struct sock *sk = sock->sk;
1082 int len, err = 0;
1083 struct bt_voice voice;
1084 u32 phys;
1085 int buf_len;
1086 struct codec_list *c;
1087 u8 num_codecs, i, __user *ptr;
1088 struct hci_dev *hdev;
1089 struct hci_codec_caps *caps;
1090 struct bt_codec codec;
1091
1092 BT_DBG("sk %p", sk);
1093
1094 if (level == SOL_SCO)
1095 return sco_sock_getsockopt_old(sock, optname, optval, optlen);
1096
1097 if (get_user(len, optlen))
1098 return -EFAULT;
1099
1100 lock_sock(sk);
1101
1102 switch (optname) {
1103
1104 case BT_DEFER_SETUP:
1105 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
1106 err = -EINVAL;
1107 break;
1108 }
1109
1110 if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
1111 (u32 __user *)optval))
1112 err = -EFAULT;
1113
1114 break;
1115
1116 case BT_VOICE:
1117 voice.setting = sco_pi(sk)->setting;
1118
1119 len = min_t(unsigned int, len, sizeof(voice));
1120 if (copy_to_user(optval, (char *)&voice, len))
1121 err = -EFAULT;
1122
1123 break;
1124
1125 case BT_PHY:
1126 if (sk->sk_state != BT_CONNECTED) {
1127 err = -ENOTCONN;
1128 break;
1129 }
1130
1131 phys = hci_conn_get_phy(sco_pi(sk)->conn->hcon);
1132
1133 if (put_user(phys, (u32 __user *) optval))
1134 err = -EFAULT;
1135 break;
1136
1137 case BT_PKT_STATUS:
1138 if (put_user(test_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags),
1139 (int __user *)optval))
1140 err = -EFAULT;
1141 break;
1142
1143 case BT_SNDMTU:
1144 case BT_RCVMTU:
1145 if (sk->sk_state != BT_CONNECTED) {
1146 err = -ENOTCONN;
1147 break;
1148 }
1149
1150 if (put_user(sco_pi(sk)->conn->mtu, (u32 __user *)optval))
1151 err = -EFAULT;
1152 break;
1153
1154 case BT_CODEC:
1155 num_codecs = 0;
1156 buf_len = 0;
1157
1158 hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src, BDADDR_BREDR);
1159 if (!hdev) {
1160 err = -EBADFD;
1161 break;
1162 }
1163
1164 if (!hci_dev_test_flag(hdev, HCI_OFFLOAD_CODECS_ENABLED)) {
1165 hci_dev_put(hdev);
1166 err = -EOPNOTSUPP;
1167 break;
1168 }
1169
1170 if (!hdev->get_data_path_id) {
1171 hci_dev_put(hdev);
1172 err = -EOPNOTSUPP;
1173 break;
1174 }
1175
1176 release_sock(sk);
1177
1178 /* find total buffer size required to copy codec + caps */
1179 hci_dev_lock(hdev);
1180 list_for_each_entry(c, &hdev->local_codecs, list) {
1181 if (c->transport != HCI_TRANSPORT_SCO_ESCO)
1182 continue;
1183 num_codecs++;
1184 for (i = 0, caps = c->caps; i < c->num_caps; i++) {
1185 buf_len += 1 + caps->len;
1186 caps = (void *)&caps->data[caps->len];
1187 }
1188 buf_len += sizeof(struct bt_codec);
1189 }
1190 hci_dev_unlock(hdev);
1191
1192 buf_len += sizeof(struct bt_codecs);
1193 if (buf_len > len) {
1194 hci_dev_put(hdev);
1195 return -ENOBUFS;
1196 }
1197 ptr = optval;
1198
1199 if (put_user(num_codecs, ptr)) {
1200 hci_dev_put(hdev);
1201 return -EFAULT;
1202 }
1203 ptr += sizeof(num_codecs);
1204
1205 /* Iterate all the codecs supported over SCO and populate
1206 * codec data
1207 */
1208 hci_dev_lock(hdev);
1209 list_for_each_entry(c, &hdev->local_codecs, list) {
1210 if (c->transport != HCI_TRANSPORT_SCO_ESCO)
1211 continue;
1212
1213 codec.id = c->id;
1214 codec.cid = c->cid;
1215 codec.vid = c->vid;
1216 err = hdev->get_data_path_id(hdev, &codec.data_path);
1217 if (err < 0)
1218 break;
1219 codec.num_caps = c->num_caps;
1220 if (copy_to_user(ptr, &codec, sizeof(codec))) {
1221 err = -EFAULT;
1222 break;
1223 }
1224 ptr += sizeof(codec);
1225
1226 /* find codec capabilities data length */
1227 len = 0;
1228 for (i = 0, caps = c->caps; i < c->num_caps; i++) {
1229 len += 1 + caps->len;
1230 caps = (void *)&caps->data[caps->len];
1231 }
1232
1233 /* copy codec capabilities data */
1234 if (len && copy_to_user(ptr, c->caps, len)) {
1235 err = -EFAULT;
1236 break;
1237 }
1238 ptr += len;
1239 }
1240
1241 hci_dev_unlock(hdev);
1242 hci_dev_put(hdev);
1243
1244 lock_sock(sk);
1245
1246 if (!err && put_user(buf_len, optlen))
1247 err = -EFAULT;
1248
1249 break;
1250
1251 default:
1252 err = -ENOPROTOOPT;
1253 break;
1254 }
1255
1256 release_sock(sk);
1257 return err;
1258}
1259
1260static int sco_sock_shutdown(struct socket *sock, int how)
1261{
1262 struct sock *sk = sock->sk;
1263 int err = 0;
1264
1265 BT_DBG("sock %p, sk %p", sock, sk);
1266
1267 if (!sk)
1268 return 0;
1269
1270 sock_hold(sk);
1271 lock_sock(sk);
1272
1273 if (!sk->sk_shutdown) {
1274 sk->sk_shutdown = SHUTDOWN_MASK;
1275 sco_sock_clear_timer(sk);
1276 __sco_sock_close(sk);
1277
1278 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
1279 !(current->flags & PF_EXITING))
1280 err = bt_sock_wait_state(sk, BT_CLOSED,
1281 sk->sk_lingertime);
1282 }
1283
1284 release_sock(sk);
1285 sock_put(sk);
1286
1287 return err;
1288}
1289
1290static int sco_sock_release(struct socket *sock)
1291{
1292 struct sock *sk = sock->sk;
1293 int err = 0;
1294
1295 BT_DBG("sock %p, sk %p", sock, sk);
1296
1297 if (!sk)
1298 return 0;
1299
1300 sco_sock_close(sk);
1301
1302 if (sock_flag(sk, SOCK_LINGER) && READ_ONCE(sk->sk_lingertime) &&
1303 !(current->flags & PF_EXITING)) {
1304 lock_sock(sk);
1305 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
1306 release_sock(sk);
1307 }
1308
1309 sock_orphan(sk);
1310 sco_sock_kill(sk);
1311 return err;
1312}
1313
1314static void sco_conn_ready(struct sco_conn *conn)
1315{
1316 struct sock *parent;
1317 struct sock *sk = conn->sk;
1318
1319 BT_DBG("conn %p", conn);
1320
1321 if (sk) {
1322 lock_sock(sk);
1323 sco_sock_clear_timer(sk);
1324 sk->sk_state = BT_CONNECTED;
1325 sk->sk_state_change(sk);
1326 release_sock(sk);
1327 } else {
1328 sco_conn_lock(conn);
1329
1330 if (!conn->hcon) {
1331 sco_conn_unlock(conn);
1332 return;
1333 }
1334
1335 parent = sco_get_sock_listen(&conn->hcon->src);
1336 if (!parent) {
1337 sco_conn_unlock(conn);
1338 return;
1339 }
1340
1341 lock_sock(parent);
1342
1343 sk = sco_sock_alloc(sock_net(parent), NULL,
1344 BTPROTO_SCO, GFP_ATOMIC, 0);
1345 if (!sk) {
1346 release_sock(parent);
1347 sco_conn_unlock(conn);
1348 return;
1349 }
1350
1351 sco_sock_init(sk, parent);
1352
1353 bacpy(&sco_pi(sk)->src, &conn->hcon->src);
1354 bacpy(&sco_pi(sk)->dst, &conn->hcon->dst);
1355
1356 hci_conn_hold(conn->hcon);
1357 __sco_chan_add(conn, sk, parent);
1358
1359 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags))
1360 sk->sk_state = BT_CONNECT2;
1361 else
1362 sk->sk_state = BT_CONNECTED;
1363
1364 /* Wake up parent */
1365 parent->sk_data_ready(parent);
1366
1367 release_sock(parent);
1368
1369 sco_conn_unlock(conn);
1370 }
1371}
1372
1373/* ----- SCO interface with lower layer (HCI) ----- */
1374int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
1375{
1376 struct sock *sk;
1377 int lm = 0;
1378
1379 BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr);
1380
1381 /* Find listening sockets */
1382 read_lock(&sco_sk_list.lock);
1383 sk_for_each(sk, &sco_sk_list.head) {
1384 if (sk->sk_state != BT_LISTEN)
1385 continue;
1386
1387 if (!bacmp(&sco_pi(sk)->src, &hdev->bdaddr) ||
1388 !bacmp(&sco_pi(sk)->src, BDADDR_ANY)) {
1389 lm |= HCI_LM_ACCEPT;
1390
1391 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))
1392 *flags |= HCI_PROTO_DEFER;
1393 break;
1394 }
1395 }
1396 read_unlock(&sco_sk_list.lock);
1397
1398 return lm;
1399}
1400
1401static bool sco_match(struct hci_conn *hcon)
1402{
1403 return hcon->type == SCO_LINK || hcon->type == ESCO_LINK;
1404}
1405
1406static void sco_connect_cfm(struct hci_conn *hcon, __u8 status)
1407{
1408 BT_DBG("hcon %p bdaddr %pMR status %u", hcon, &hcon->dst, status);
1409
1410 if (!status) {
1411 struct sco_conn *conn;
1412
1413 conn = sco_conn_add(hcon);
1414 if (conn)
1415 sco_conn_ready(conn);
1416 } else
1417 sco_conn_del(hcon, bt_to_errno(status));
1418}
1419
1420static void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason)
1421{
1422 BT_DBG("hcon %p reason %d", hcon, reason);
1423
1424 sco_conn_del(hcon, bt_to_errno(reason));
1425}
1426
1427void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
1428{
1429 struct sco_conn *conn = hcon->sco_data;
1430
1431 if (!conn)
1432 goto drop;
1433
1434 BT_DBG("conn %p len %u", conn, skb->len);
1435
1436 if (skb->len) {
1437 sco_recv_frame(conn, skb);
1438 return;
1439 }
1440
1441drop:
1442 kfree_skb(skb);
1443}
1444
1445static struct hci_cb sco_cb = {
1446 .name = "SCO",
1447 .match = sco_match,
1448 .connect_cfm = sco_connect_cfm,
1449 .disconn_cfm = sco_disconn_cfm,
1450};
1451
1452static int sco_debugfs_show(struct seq_file *f, void *p)
1453{
1454 struct sock *sk;
1455
1456 read_lock(&sco_sk_list.lock);
1457
1458 sk_for_each(sk, &sco_sk_list.head) {
1459 seq_printf(f, "%pMR %pMR %d\n", &sco_pi(sk)->src,
1460 &sco_pi(sk)->dst, sk->sk_state);
1461 }
1462
1463 read_unlock(&sco_sk_list.lock);
1464
1465 return 0;
1466}
1467
1468DEFINE_SHOW_ATTRIBUTE(sco_debugfs);
1469
1470static struct dentry *sco_debugfs;
1471
1472static const struct proto_ops sco_sock_ops = {
1473 .family = PF_BLUETOOTH,
1474 .owner = THIS_MODULE,
1475 .release = sco_sock_release,
1476 .bind = sco_sock_bind,
1477 .connect = sco_sock_connect,
1478 .listen = sco_sock_listen,
1479 .accept = sco_sock_accept,
1480 .getname = sco_sock_getname,
1481 .sendmsg = sco_sock_sendmsg,
1482 .recvmsg = sco_sock_recvmsg,
1483 .poll = bt_sock_poll,
1484 .ioctl = bt_sock_ioctl,
1485 .gettstamp = sock_gettstamp,
1486 .mmap = sock_no_mmap,
1487 .socketpair = sock_no_socketpair,
1488 .shutdown = sco_sock_shutdown,
1489 .setsockopt = sco_sock_setsockopt,
1490 .getsockopt = sco_sock_getsockopt
1491};
1492
1493static const struct net_proto_family sco_sock_family_ops = {
1494 .family = PF_BLUETOOTH,
1495 .owner = THIS_MODULE,
1496 .create = sco_sock_create,
1497};
1498
1499int __init sco_init(void)
1500{
1501 int err;
1502
1503 BUILD_BUG_ON(sizeof(struct sockaddr_sco) > sizeof(struct sockaddr));
1504
1505 err = proto_register(&sco_proto, 0);
1506 if (err < 0)
1507 return err;
1508
1509 err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops);
1510 if (err < 0) {
1511 BT_ERR("SCO socket registration failed");
1512 goto error;
1513 }
1514
1515 err = bt_procfs_init(&init_net, "sco", &sco_sk_list, NULL);
1516 if (err < 0) {
1517 BT_ERR("Failed to create SCO proc file");
1518 bt_sock_unregister(BTPROTO_SCO);
1519 goto error;
1520 }
1521
1522 BT_INFO("SCO socket layer initialized");
1523
1524 hci_register_cb(&sco_cb);
1525
1526 if (IS_ERR_OR_NULL(bt_debugfs))
1527 return 0;
1528
1529 sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs,
1530 NULL, &sco_debugfs_fops);
1531
1532 return 0;
1533
1534error:
1535 proto_unregister(&sco_proto);
1536 return err;
1537}
1538
1539void sco_exit(void)
1540{
1541 bt_procfs_cleanup(&init_net, "sco");
1542
1543 debugfs_remove(sco_debugfs);
1544
1545 hci_unregister_cb(&sco_cb);
1546
1547 bt_sock_unregister(BTPROTO_SCO);
1548
1549 proto_unregister(&sco_proto);
1550}
1551
1552module_param(disable_esco, bool, 0644);
1553MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation");