Loading...
1/*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4
5 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License version 2 as
9 published by the Free Software Foundation;
10
11 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
12 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
14 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
15 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
16 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19
20 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
21 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
22 SOFTWARE IS DISCLAIMED.
23*/
24
25/* Bluetooth SCO sockets. */
26
27#include <linux/module.h>
28#include <linux/debugfs.h>
29#include <linux/seq_file.h>
30
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
31#include <net/bluetooth/bluetooth.h>
32#include <net/bluetooth/hci_core.h>
33#include <net/bluetooth/sco.h>
34
35static bool disable_esco;
36
37static const struct proto_ops sco_sock_ops;
38
39static struct bt_sock_list sco_sk_list = {
40 .lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock)
41};
42
43static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent);
44static void sco_chan_del(struct sock *sk, int err);
45
46static void sco_sock_close(struct sock *sk);
47static void sco_sock_kill(struct sock *sk);
48
49/* ---- SCO timers ---- */
50static void sco_sock_timeout(unsigned long arg)
51{
52 struct sock *sk = (struct sock *) arg;
53
54 BT_DBG("sock %p state %d", sk, sk->sk_state);
55
56 bh_lock_sock(sk);
57 sk->sk_err = ETIMEDOUT;
58 sk->sk_state_change(sk);
59 bh_unlock_sock(sk);
60
61 sco_sock_kill(sk);
62 sock_put(sk);
63}
64
65static void sco_sock_set_timer(struct sock *sk, long timeout)
66{
67 BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
68 sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout);
69}
70
71static void sco_sock_clear_timer(struct sock *sk)
72{
73 BT_DBG("sock %p state %d", sk, sk->sk_state);
74 sk_stop_timer(sk, &sk->sk_timer);
75}
76
77/* ---- SCO connections ---- */
78static struct sco_conn *sco_conn_add(struct hci_conn *hcon)
79{
80 struct hci_dev *hdev = hcon->hdev;
81 struct sco_conn *conn = hcon->sco_data;
82
83 if (conn)
84 return conn;
85
86 conn = kzalloc(sizeof(struct sco_conn), GFP_KERNEL);
87 if (!conn)
88 return NULL;
89
90 spin_lock_init(&conn->lock);
91
92 hcon->sco_data = conn;
93 conn->hcon = hcon;
94
95 if (hdev->sco_mtu > 0)
96 conn->mtu = hdev->sco_mtu;
97 else
98 conn->mtu = 60;
99
100 BT_DBG("hcon %p conn %p", hcon, conn);
101
102 return conn;
103}
104
105static struct sock *sco_chan_get(struct sco_conn *conn)
106{
107 struct sock *sk = NULL;
108 sco_conn_lock(conn);
109 sk = conn->sk;
110 sco_conn_unlock(conn);
111 return sk;
112}
113
114static int sco_conn_del(struct hci_conn *hcon, int err)
115{
116 struct sco_conn *conn = hcon->sco_data;
117 struct sock *sk;
118
119 if (!conn)
120 return 0;
121
122 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
123
124 /* Kill socket */
125 sk = sco_chan_get(conn);
126 if (sk) {
127 bh_lock_sock(sk);
128 sco_sock_clear_timer(sk);
129 sco_chan_del(sk, err);
130 bh_unlock_sock(sk);
131 sco_sock_kill(sk);
132 }
133
134 hcon->sco_data = NULL;
135 kfree(conn);
136 return 0;
137}
138
139static int sco_chan_add(struct sco_conn *conn, struct sock *sk,
140 struct sock *parent)
141{
142 int err = 0;
143
144 sco_conn_lock(conn);
145 if (conn->sk)
146 err = -EBUSY;
147 else
148 __sco_chan_add(conn, sk, parent);
149
150 sco_conn_unlock(conn);
151 return err;
152}
153
154static int sco_connect(struct sock *sk)
155{
156 struct sco_conn *conn;
157 struct hci_conn *hcon;
158 struct hci_dev *hdev;
159 int err, type;
160
161 BT_DBG("%pMR -> %pMR", &sco_pi(sk)->src, &sco_pi(sk)->dst);
162
163 hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src);
164 if (!hdev)
165 return -EHOSTUNREACH;
166
167 hci_dev_lock(hdev);
168
169 if (lmp_esco_capable(hdev) && !disable_esco)
170 type = ESCO_LINK;
171 else
172 type = SCO_LINK;
173
174 if (sco_pi(sk)->setting == BT_VOICE_TRANSPARENT &&
175 (!lmp_transp_capable(hdev) || !lmp_esco_capable(hdev))) {
176 err = -EOPNOTSUPP;
177 goto done;
178 }
179
180 hcon = hci_connect_sco(hdev, type, &sco_pi(sk)->dst,
181 sco_pi(sk)->setting);
182 if (IS_ERR(hcon)) {
183 err = PTR_ERR(hcon);
184 goto done;
185 }
186
187 conn = sco_conn_add(hcon);
188 if (!conn) {
189 hci_conn_drop(hcon);
190 err = -ENOMEM;
191 goto done;
192 }
193
194 /* Update source addr of the socket */
195 bacpy(&sco_pi(sk)->src, &hcon->src);
196
197 err = sco_chan_add(conn, sk, NULL);
198 if (err)
199 goto done;
200
201 if (hcon->state == BT_CONNECTED) {
202 sco_sock_clear_timer(sk);
203 sk->sk_state = BT_CONNECTED;
204 } else {
205 sk->sk_state = BT_CONNECT;
206 sco_sock_set_timer(sk, sk->sk_sndtimeo);
207 }
208
209done:
210 hci_dev_unlock(hdev);
211 hci_dev_put(hdev);
212 return err;
213}
214
215static int sco_send_frame(struct sock *sk, struct msghdr *msg, int len)
216{
217 struct sco_conn *conn = sco_pi(sk)->conn;
218 struct sk_buff *skb;
219 int err;
220
221 /* Check outgoing MTU */
222 if (len > conn->mtu)
223 return -EINVAL;
224
225 BT_DBG("sk %p len %d", sk, len);
226
227 skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
228 if (!skb)
229 return err;
230
231 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
232 kfree_skb(skb);
233 return -EFAULT;
234 }
235
236 hci_send_sco(conn->hcon, skb);
237
238 return len;
239}
240
241static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb)
242{
243 struct sock *sk = sco_chan_get(conn);
244
245 if (!sk)
246 goto drop;
247
248 BT_DBG("sk %p len %d", sk, skb->len);
249
250 if (sk->sk_state != BT_CONNECTED)
251 goto drop;
252
253 if (!sock_queue_rcv_skb(sk, skb))
254 return;
255
256drop:
257 kfree_skb(skb);
258}
259
260/* -------- Socket interface ---------- */
261static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba)
262{
263 struct sock *sk;
264
265 sk_for_each(sk, &sco_sk_list.head) {
266 if (sk->sk_state != BT_LISTEN)
267 continue;
268
269 if (!bacmp(&sco_pi(sk)->src, ba))
270 return sk;
271 }
272
273 return NULL;
274}
275
276/* Find socket listening on source bdaddr.
277 * Returns closest match.
278 */
279static struct sock *sco_get_sock_listen(bdaddr_t *src)
280{
281 struct sock *sk = NULL, *sk1 = NULL;
282
283 read_lock(&sco_sk_list.lock);
284
285 sk_for_each(sk, &sco_sk_list.head) {
286 if (sk->sk_state != BT_LISTEN)
287 continue;
288
289 /* Exact match. */
290 if (!bacmp(&sco_pi(sk)->src, src))
291 break;
292
293 /* Closest match */
294 if (!bacmp(&sco_pi(sk)->src, BDADDR_ANY))
295 sk1 = sk;
296 }
297
298 read_unlock(&sco_sk_list.lock);
299
300 return sk ? sk : sk1;
301}
302
303static void sco_sock_destruct(struct sock *sk)
304{
305 BT_DBG("sk %p", sk);
306
307 skb_queue_purge(&sk->sk_receive_queue);
308 skb_queue_purge(&sk->sk_write_queue);
309}
310
311static void sco_sock_cleanup_listen(struct sock *parent)
312{
313 struct sock *sk;
314
315 BT_DBG("parent %p", parent);
316
317 /* Close not yet accepted channels */
318 while ((sk = bt_accept_dequeue(parent, NULL))) {
319 sco_sock_close(sk);
320 sco_sock_kill(sk);
321 }
322
323 parent->sk_state = BT_CLOSED;
324 sock_set_flag(parent, SOCK_ZAPPED);
325}
326
327/* Kill socket (only if zapped and orphan)
328 * Must be called on unlocked socket.
329 */
330static void sco_sock_kill(struct sock *sk)
331{
332 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
333 return;
334
335 BT_DBG("sk %p state %d", sk, sk->sk_state);
336
337 /* Kill poor orphan */
338 bt_sock_unlink(&sco_sk_list, sk);
339 sock_set_flag(sk, SOCK_DEAD);
340 sock_put(sk);
341}
342
343static void __sco_sock_close(struct sock *sk)
344{
345 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
346
347 switch (sk->sk_state) {
348 case BT_LISTEN:
349 sco_sock_cleanup_listen(sk);
350 break;
351
352 case BT_CONNECTED:
353 case BT_CONFIG:
354 if (sco_pi(sk)->conn->hcon) {
355 sk->sk_state = BT_DISCONN;
356 sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT);
357 hci_conn_drop(sco_pi(sk)->conn->hcon);
358 sco_pi(sk)->conn->hcon = NULL;
359 } else
360 sco_chan_del(sk, ECONNRESET);
361 break;
362
363 case BT_CONNECT2:
364 case BT_CONNECT:
365 case BT_DISCONN:
366 sco_chan_del(sk, ECONNRESET);
367 break;
368
369 default:
370 sock_set_flag(sk, SOCK_ZAPPED);
371 break;
372 }
373}
374
375/* Must be called on unlocked socket. */
376static void sco_sock_close(struct sock *sk)
377{
378 sco_sock_clear_timer(sk);
379 lock_sock(sk);
380 __sco_sock_close(sk);
381 release_sock(sk);
382 sco_sock_kill(sk);
383}
384
385static void sco_sock_init(struct sock *sk, struct sock *parent)
386{
387 BT_DBG("sk %p", sk);
388
389 if (parent) {
390 sk->sk_type = parent->sk_type;
391 bt_sk(sk)->flags = bt_sk(parent)->flags;
392 security_sk_clone(parent, sk);
393 }
394}
395
396static struct proto sco_proto = {
397 .name = "SCO",
398 .owner = THIS_MODULE,
399 .obj_size = sizeof(struct sco_pinfo)
400};
401
402static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio)
403{
404 struct sock *sk;
405
406 sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto);
407 if (!sk)
408 return NULL;
409
410 sock_init_data(sock, sk);
411 INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
412
413 sk->sk_destruct = sco_sock_destruct;
414 sk->sk_sndtimeo = SCO_CONN_TIMEOUT;
415
416 sock_reset_flag(sk, SOCK_ZAPPED);
417
418 sk->sk_protocol = proto;
419 sk->sk_state = BT_OPEN;
420
421 sco_pi(sk)->setting = BT_VOICE_CVSD_16BIT;
422
423 setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk);
424
425 bt_sock_link(&sco_sk_list, sk);
426 return sk;
427}
428
429static int sco_sock_create(struct net *net, struct socket *sock, int protocol,
430 int kern)
431{
432 struct sock *sk;
433
434 BT_DBG("sock %p", sock);
435
436 sock->state = SS_UNCONNECTED;
437
438 if (sock->type != SOCK_SEQPACKET)
439 return -ESOCKTNOSUPPORT;
440
441 sock->ops = &sco_sock_ops;
442
443 sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC);
444 if (!sk)
445 return -ENOMEM;
446
447 sco_sock_init(sk, NULL);
448 return 0;
449}
450
451static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
452{
453 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
454 struct sock *sk = sock->sk;
455 int err = 0;
456
457 BT_DBG("sk %p %pMR", sk, &sa->sco_bdaddr);
458
459 if (!addr || addr->sa_family != AF_BLUETOOTH)
460 return -EINVAL;
461
462 lock_sock(sk);
463
464 if (sk->sk_state != BT_OPEN) {
465 err = -EBADFD;
466 goto done;
467 }
468
469 if (sk->sk_type != SOCK_SEQPACKET) {
470 err = -EINVAL;
471 goto done;
472 }
473
474 bacpy(&sco_pi(sk)->src, &sa->sco_bdaddr);
475
476 sk->sk_state = BT_BOUND;
477
478done:
479 release_sock(sk);
480 return err;
481}
482
483static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
484{
485 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
486 struct sock *sk = sock->sk;
487 int err;
488
489 BT_DBG("sk %p", sk);
490
491 if (alen < sizeof(struct sockaddr_sco) ||
492 addr->sa_family != AF_BLUETOOTH)
493 return -EINVAL;
494
495 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
496 return -EBADFD;
497
498 if (sk->sk_type != SOCK_SEQPACKET)
499 return -EINVAL;
500
501 lock_sock(sk);
502
503 /* Set destination address and psm */
504 bacpy(&sco_pi(sk)->dst, &sa->sco_bdaddr);
505
506 err = sco_connect(sk);
507 if (err)
508 goto done;
509
510 err = bt_sock_wait_state(sk, BT_CONNECTED,
511 sock_sndtimeo(sk, flags & O_NONBLOCK));
512
513done:
514 release_sock(sk);
515 return err;
516}
517
518static int sco_sock_listen(struct socket *sock, int backlog)
519{
520 struct sock *sk = sock->sk;
521 bdaddr_t *src = &sco_pi(sk)->src;
522 int err = 0;
523
524 BT_DBG("sk %p backlog %d", sk, backlog);
525
526 lock_sock(sk);
527
528 if (sk->sk_state != BT_BOUND) {
529 err = -EBADFD;
530 goto done;
531 }
532
533 if (sk->sk_type != SOCK_SEQPACKET) {
534 err = -EINVAL;
535 goto done;
536 }
537
538 write_lock(&sco_sk_list.lock);
539
540 if (__sco_get_sock_listen_by_addr(src)) {
541 err = -EADDRINUSE;
542 goto unlock;
543 }
544
545 sk->sk_max_ack_backlog = backlog;
546 sk->sk_ack_backlog = 0;
547
548 sk->sk_state = BT_LISTEN;
549
550unlock:
551 write_unlock(&sco_sk_list.lock);
552
553done:
554 release_sock(sk);
555 return err;
556}
557
558static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags)
559{
560 DECLARE_WAITQUEUE(wait, current);
561 struct sock *sk = sock->sk, *ch;
562 long timeo;
563 int err = 0;
564
565 lock_sock(sk);
566
567 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
568
569 BT_DBG("sk %p timeo %ld", sk, timeo);
570
571 /* Wait for an incoming connection. (wake-one). */
572 add_wait_queue_exclusive(sk_sleep(sk), &wait);
573 while (1) {
574 set_current_state(TASK_INTERRUPTIBLE);
575
576 if (sk->sk_state != BT_LISTEN) {
577 err = -EBADFD;
578 break;
579 }
580
581 ch = bt_accept_dequeue(sk, newsock);
582 if (ch)
583 break;
584
585 if (!timeo) {
586 err = -EAGAIN;
587 break;
588 }
589
590 if (signal_pending(current)) {
591 err = sock_intr_errno(timeo);
592 break;
593 }
594
595 release_sock(sk);
596 timeo = schedule_timeout(timeo);
597 lock_sock(sk);
598 }
599 __set_current_state(TASK_RUNNING);
600 remove_wait_queue(sk_sleep(sk), &wait);
601
602 if (err)
603 goto done;
604
605 newsock->state = SS_CONNECTED;
606
607 BT_DBG("new socket %p", ch);
608
609done:
610 release_sock(sk);
611 return err;
612}
613
614static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer)
615{
616 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
617 struct sock *sk = sock->sk;
618
619 BT_DBG("sock %p, sk %p", sock, sk);
620
621 addr->sa_family = AF_BLUETOOTH;
622 *len = sizeof(struct sockaddr_sco);
623
624 if (peer)
625 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->dst);
626 else
627 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->src);
628
629 return 0;
630}
631
632static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
633 struct msghdr *msg, size_t len)
634{
635 struct sock *sk = sock->sk;
636 int err;
637
638 BT_DBG("sock %p, sk %p", sock, sk);
639
640 err = sock_error(sk);
641 if (err)
642 return err;
643
644 if (msg->msg_flags & MSG_OOB)
645 return -EOPNOTSUPP;
646
647 lock_sock(sk);
648
649 if (sk->sk_state == BT_CONNECTED)
650 err = sco_send_frame(sk, msg, len);
651 else
652 err = -ENOTCONN;
653
654 release_sock(sk);
655 return err;
656}
657
658static void sco_conn_defer_accept(struct hci_conn *conn, u16 setting)
659{
660 struct hci_dev *hdev = conn->hdev;
661
662 BT_DBG("conn %p", conn);
663
664 conn->state = BT_CONFIG;
665
666 if (!lmp_esco_capable(hdev)) {
667 struct hci_cp_accept_conn_req cp;
668
669 bacpy(&cp.bdaddr, &conn->dst);
670 cp.role = 0x00; /* Ignored */
671
672 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
673 } else {
674 struct hci_cp_accept_sync_conn_req cp;
675
676 bacpy(&cp.bdaddr, &conn->dst);
677 cp.pkt_type = cpu_to_le16(conn->pkt_type);
678
679 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
680 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
681 cp.content_format = cpu_to_le16(setting);
682
683 switch (setting & SCO_AIRMODE_MASK) {
684 case SCO_AIRMODE_TRANSP:
685 if (conn->pkt_type & ESCO_2EV3)
686 cp.max_latency = cpu_to_le16(0x0008);
687 else
688 cp.max_latency = cpu_to_le16(0x000D);
689 cp.retrans_effort = 0x02;
690 break;
691 case SCO_AIRMODE_CVSD:
692 cp.max_latency = cpu_to_le16(0xffff);
693 cp.retrans_effort = 0xff;
694 break;
695 }
696
697 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ,
698 sizeof(cp), &cp);
699 }
700}
701
702static int sco_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
703 struct msghdr *msg, size_t len, int flags)
704{
705 struct sock *sk = sock->sk;
706 struct sco_pinfo *pi = sco_pi(sk);
707
708 lock_sock(sk);
709
710 if (sk->sk_state == BT_CONNECT2 &&
711 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
712 sco_conn_defer_accept(pi->conn->hcon, pi->setting);
713 sk->sk_state = BT_CONFIG;
714
715 release_sock(sk);
716 return 0;
717 }
718
719 release_sock(sk);
720
721 return bt_sock_recvmsg(iocb, sock, msg, len, flags);
722}
723
724static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen)
725{
726 struct sock *sk = sock->sk;
727 int len, err = 0;
728 struct bt_voice voice;
729 u32 opt;
730
731 BT_DBG("sk %p", sk);
732
733 lock_sock(sk);
734
735 switch (optname) {
736
737 case BT_DEFER_SETUP:
738 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
739 err = -EINVAL;
740 break;
741 }
742
743 if (get_user(opt, (u32 __user *) optval)) {
744 err = -EFAULT;
745 break;
746 }
747
748 if (opt)
749 set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
750 else
751 clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
752 break;
753
754 case BT_VOICE:
755 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
756 sk->sk_state != BT_CONNECT2) {
757 err = -EINVAL;
758 break;
759 }
760
761 voice.setting = sco_pi(sk)->setting;
762
763 len = min_t(unsigned int, sizeof(voice), optlen);
764 if (copy_from_user((char *) &voice, optval, len)) {
765 err = -EFAULT;
766 break;
767 }
768
769 /* Explicitly check for these values */
770 if (voice.setting != BT_VOICE_TRANSPARENT &&
771 voice.setting != BT_VOICE_CVSD_16BIT) {
772 err = -EINVAL;
773 break;
774 }
775
776 sco_pi(sk)->setting = voice.setting;
777 break;
778
779 default:
780 err = -ENOPROTOOPT;
781 break;
782 }
783
784 release_sock(sk);
785 return err;
786}
787
788static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen)
789{
790 struct sock *sk = sock->sk;
791 struct sco_options opts;
792 struct sco_conninfo cinfo;
793 int len, err = 0;
794
795 BT_DBG("sk %p", sk);
796
797 if (get_user(len, optlen))
798 return -EFAULT;
799
800 lock_sock(sk);
801
802 switch (optname) {
803 case SCO_OPTIONS:
804 if (sk->sk_state != BT_CONNECTED &&
805 !(sk->sk_state == BT_CONNECT2 &&
806 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
807 err = -ENOTCONN;
808 break;
809 }
810
811 opts.mtu = sco_pi(sk)->conn->mtu;
812
813 BT_DBG("mtu %d", opts.mtu);
814
815 len = min_t(unsigned int, len, sizeof(opts));
816 if (copy_to_user(optval, (char *)&opts, len))
817 err = -EFAULT;
818
819 break;
820
821 case SCO_CONNINFO:
822 if (sk->sk_state != BT_CONNECTED &&
823 !(sk->sk_state == BT_CONNECT2 &&
824 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
825 err = -ENOTCONN;
826 break;
827 }
828
829 memset(&cinfo, 0, sizeof(cinfo));
830 cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle;
831 memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3);
832
833 len = min_t(unsigned int, len, sizeof(cinfo));
834 if (copy_to_user(optval, (char *)&cinfo, len))
835 err = -EFAULT;
836
837 break;
838
839 default:
840 err = -ENOPROTOOPT;
841 break;
842 }
843
844 release_sock(sk);
845 return err;
846}
847
848static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
849{
850 struct sock *sk = sock->sk;
851 int len, err = 0;
852 struct bt_voice voice;
853
854 BT_DBG("sk %p", sk);
855
856 if (level == SOL_SCO)
857 return sco_sock_getsockopt_old(sock, optname, optval, optlen);
858
859 if (get_user(len, optlen))
860 return -EFAULT;
861
862 lock_sock(sk);
863
864 switch (optname) {
865
866 case BT_DEFER_SETUP:
867 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
868 err = -EINVAL;
869 break;
870 }
871
872 if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
873 (u32 __user *) optval))
874 err = -EFAULT;
875
876 break;
877
878 case BT_VOICE:
879 voice.setting = sco_pi(sk)->setting;
880
881 len = min_t(unsigned int, len, sizeof(voice));
882 if (copy_to_user(optval, (char *)&voice, len))
883 err = -EFAULT;
884
885 break;
886
887 default:
888 err = -ENOPROTOOPT;
889 break;
890 }
891
892 release_sock(sk);
893 return err;
894}
895
896static int sco_sock_shutdown(struct socket *sock, int how)
897{
898 struct sock *sk = sock->sk;
899 int err = 0;
900
901 BT_DBG("sock %p, sk %p", sock, sk);
902
903 if (!sk)
904 return 0;
905
906 lock_sock(sk);
907 if (!sk->sk_shutdown) {
908 sk->sk_shutdown = SHUTDOWN_MASK;
909 sco_sock_clear_timer(sk);
910 __sco_sock_close(sk);
911
912 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime)
913 err = bt_sock_wait_state(sk, BT_CLOSED,
914 sk->sk_lingertime);
915 }
916 release_sock(sk);
917 return err;
918}
919
920static int sco_sock_release(struct socket *sock)
921{
922 struct sock *sk = sock->sk;
923 int err = 0;
924
925 BT_DBG("sock %p, sk %p", sock, sk);
926
927 if (!sk)
928 return 0;
929
930 sco_sock_close(sk);
931
932 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) {
933 lock_sock(sk);
934 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
935 release_sock(sk);
936 }
937
938 sock_orphan(sk);
939 sco_sock_kill(sk);
940 return err;
941}
942
943static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent)
944{
945 BT_DBG("conn %p", conn);
946
947 sco_pi(sk)->conn = conn;
948 conn->sk = sk;
949
950 if (parent)
951 bt_accept_enqueue(parent, sk);
952}
953
954/* Delete channel.
955 * Must be called on the locked socket. */
956static void sco_chan_del(struct sock *sk, int err)
957{
958 struct sco_conn *conn;
959
960 conn = sco_pi(sk)->conn;
961
962 BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
963
964 if (conn) {
965 sco_conn_lock(conn);
966 conn->sk = NULL;
967 sco_pi(sk)->conn = NULL;
968 sco_conn_unlock(conn);
969
970 if (conn->hcon)
971 hci_conn_drop(conn->hcon);
972 }
973
974 sk->sk_state = BT_CLOSED;
975 sk->sk_err = err;
976 sk->sk_state_change(sk);
977
978 sock_set_flag(sk, SOCK_ZAPPED);
979}
980
981static void sco_conn_ready(struct sco_conn *conn)
982{
983 struct sock *parent;
984 struct sock *sk = conn->sk;
985
986 BT_DBG("conn %p", conn);
987
988 if (sk) {
989 sco_sock_clear_timer(sk);
990 bh_lock_sock(sk);
991 sk->sk_state = BT_CONNECTED;
992 sk->sk_state_change(sk);
993 bh_unlock_sock(sk);
994 } else {
995 sco_conn_lock(conn);
996
997 parent = sco_get_sock_listen(&conn->hcon->src);
998 if (!parent) {
999 sco_conn_unlock(conn);
1000 return;
1001 }
1002
1003 bh_lock_sock(parent);
1004
1005 sk = sco_sock_alloc(sock_net(parent), NULL,
1006 BTPROTO_SCO, GFP_ATOMIC);
1007 if (!sk) {
1008 bh_unlock_sock(parent);
1009 sco_conn_unlock(conn);
1010 return;
1011 }
1012
1013 sco_sock_init(sk, parent);
1014
1015 bacpy(&sco_pi(sk)->src, &conn->hcon->src);
1016 bacpy(&sco_pi(sk)->dst, &conn->hcon->dst);
1017
1018 hci_conn_hold(conn->hcon);
1019 __sco_chan_add(conn, sk, parent);
1020
1021 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags))
1022 sk->sk_state = BT_CONNECT2;
1023 else
1024 sk->sk_state = BT_CONNECTED;
1025
1026 /* Wake up parent */
1027 parent->sk_data_ready(parent);
1028
1029 bh_unlock_sock(parent);
1030
1031 sco_conn_unlock(conn);
1032 }
1033}
1034
1035/* ----- SCO interface with lower layer (HCI) ----- */
1036int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
1037{
1038 struct sock *sk;
1039 int lm = 0;
1040
1041 BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr);
1042
1043 /* Find listening sockets */
1044 read_lock(&sco_sk_list.lock);
1045 sk_for_each(sk, &sco_sk_list.head) {
1046 if (sk->sk_state != BT_LISTEN)
1047 continue;
1048
1049 if (!bacmp(&sco_pi(sk)->src, &hdev->bdaddr) ||
1050 !bacmp(&sco_pi(sk)->src, BDADDR_ANY)) {
1051 lm |= HCI_LM_ACCEPT;
1052
1053 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))
1054 *flags |= HCI_PROTO_DEFER;
1055 break;
1056 }
1057 }
1058 read_unlock(&sco_sk_list.lock);
1059
1060 return lm;
1061}
1062
1063void sco_connect_cfm(struct hci_conn *hcon, __u8 status)
1064{
1065 BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status);
1066 if (!status) {
1067 struct sco_conn *conn;
1068
1069 conn = sco_conn_add(hcon);
1070 if (conn)
1071 sco_conn_ready(conn);
1072 } else
1073 sco_conn_del(hcon, bt_to_errno(status));
1074}
1075
1076void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason)
1077{
1078 BT_DBG("hcon %p reason %d", hcon, reason);
1079
1080 sco_conn_del(hcon, bt_to_errno(reason));
1081}
1082
1083int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
1084{
1085 struct sco_conn *conn = hcon->sco_data;
1086
1087 if (!conn)
1088 goto drop;
1089
1090 BT_DBG("conn %p len %d", conn, skb->len);
1091
1092 if (skb->len) {
1093 sco_recv_frame(conn, skb);
1094 return 0;
1095 }
1096
1097drop:
1098 kfree_skb(skb);
1099 return 0;
1100}
1101
1102static int sco_debugfs_show(struct seq_file *f, void *p)
1103{
1104 struct sock *sk;
1105
1106 read_lock(&sco_sk_list.lock);
1107
1108 sk_for_each(sk, &sco_sk_list.head) {
1109 seq_printf(f, "%pMR %pMR %d\n", &sco_pi(sk)->src,
1110 &sco_pi(sk)->dst, sk->sk_state);
1111 }
1112
1113 read_unlock(&sco_sk_list.lock);
1114
1115 return 0;
1116}
1117
1118static int sco_debugfs_open(struct inode *inode, struct file *file)
1119{
1120 return single_open(file, sco_debugfs_show, inode->i_private);
1121}
1122
1123static const struct file_operations sco_debugfs_fops = {
1124 .open = sco_debugfs_open,
1125 .read = seq_read,
1126 .llseek = seq_lseek,
1127 .release = single_release,
1128};
1129
1130static struct dentry *sco_debugfs;
1131
1132static const struct proto_ops sco_sock_ops = {
1133 .family = PF_BLUETOOTH,
1134 .owner = THIS_MODULE,
1135 .release = sco_sock_release,
1136 .bind = sco_sock_bind,
1137 .connect = sco_sock_connect,
1138 .listen = sco_sock_listen,
1139 .accept = sco_sock_accept,
1140 .getname = sco_sock_getname,
1141 .sendmsg = sco_sock_sendmsg,
1142 .recvmsg = sco_sock_recvmsg,
1143 .poll = bt_sock_poll,
1144 .ioctl = bt_sock_ioctl,
1145 .mmap = sock_no_mmap,
1146 .socketpair = sock_no_socketpair,
1147 .shutdown = sco_sock_shutdown,
1148 .setsockopt = sco_sock_setsockopt,
1149 .getsockopt = sco_sock_getsockopt
1150};
1151
1152static const struct net_proto_family sco_sock_family_ops = {
1153 .family = PF_BLUETOOTH,
1154 .owner = THIS_MODULE,
1155 .create = sco_sock_create,
1156};
1157
1158int __init sco_init(void)
1159{
1160 int err;
1161
1162 err = proto_register(&sco_proto, 0);
1163 if (err < 0)
1164 return err;
1165
1166 err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops);
1167 if (err < 0) {
1168 BT_ERR("SCO socket registration failed");
1169 goto error;
1170 }
1171
1172 err = bt_procfs_init(&init_net, "sco", &sco_sk_list, NULL);
1173 if (err < 0) {
1174 BT_ERR("Failed to create SCO proc file");
1175 bt_sock_unregister(BTPROTO_SCO);
1176 goto error;
1177 }
1178
1179 BT_INFO("SCO socket layer initialized");
1180
1181 if (IS_ERR_OR_NULL(bt_debugfs))
1182 return 0;
1183
1184 sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs,
1185 NULL, &sco_debugfs_fops);
1186
1187 return 0;
1188
1189error:
1190 proto_unregister(&sco_proto);
1191 return err;
1192}
1193
1194void __exit sco_exit(void)
1195{
1196 bt_procfs_cleanup(&init_net, "sco");
1197
1198 debugfs_remove(sco_debugfs);
1199
1200 bt_sock_unregister(BTPROTO_SCO);
1201
1202 proto_unregister(&sco_proto);
1203}
1204
1205module_param(disable_esco, bool, 0644);
1206MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation");