powerpc/eeh: Fix PE#0 check in eeh_add_to_parent_pe()
[linux/fpc-iii.git] / net / bluetooth / sco.c
blob76321b546e8426146dba242c281c2915464e7d6f
1 /*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
5 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
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;
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.
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.
25 /* Bluetooth SCO sockets. */
27 #include <linux/module.h>
28 #include <linux/debugfs.h>
29 #include <linux/seq_file.h>
31 #include <net/bluetooth/bluetooth.h>
32 #include <net/bluetooth/hci_core.h>
33 #include <net/bluetooth/sco.h>
35 static bool disable_esco;
37 static const struct proto_ops sco_sock_ops;
39 static struct bt_sock_list sco_sk_list = {
40 .lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock)
43 /* ---- SCO connections ---- */
44 struct sco_conn {
45 struct hci_conn *hcon;
47 spinlock_t lock;
48 struct sock *sk;
50 unsigned int mtu;
53 #define sco_conn_lock(c) spin_lock(&c->lock);
54 #define sco_conn_unlock(c) spin_unlock(&c->lock);
56 static void sco_sock_close(struct sock *sk);
57 static void sco_sock_kill(struct sock *sk);
59 /* ----- SCO socket info ----- */
60 #define sco_pi(sk) ((struct sco_pinfo *) sk)
62 struct 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;
71 /* ---- SCO timers ---- */
72 #define SCO_CONN_TIMEOUT (HZ * 40)
73 #define SCO_DISCONN_TIMEOUT (HZ * 2)
75 static void sco_sock_timeout(unsigned long arg)
77 struct sock *sk = (struct sock *) arg;
79 BT_DBG("sock %p state %d", sk, sk->sk_state);
81 bh_lock_sock(sk);
82 sk->sk_err = ETIMEDOUT;
83 sk->sk_state_change(sk);
84 bh_unlock_sock(sk);
86 sco_sock_kill(sk);
87 sock_put(sk);
90 static void sco_sock_set_timer(struct sock *sk, long timeout)
92 BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
93 sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout);
96 static void sco_sock_clear_timer(struct sock *sk)
98 BT_DBG("sock %p state %d", sk, sk->sk_state);
99 sk_stop_timer(sk, &sk->sk_timer);
102 /* ---- SCO connections ---- */
103 static struct sco_conn *sco_conn_add(struct hci_conn *hcon)
105 struct hci_dev *hdev = hcon->hdev;
106 struct sco_conn *conn = hcon->sco_data;
108 if (conn)
109 return conn;
111 conn = kzalloc(sizeof(struct sco_conn), GFP_KERNEL);
112 if (!conn)
113 return NULL;
115 spin_lock_init(&conn->lock);
117 hcon->sco_data = conn;
118 conn->hcon = hcon;
120 if (hdev->sco_mtu > 0)
121 conn->mtu = hdev->sco_mtu;
122 else
123 conn->mtu = 60;
125 BT_DBG("hcon %p conn %p", hcon, conn);
127 return conn;
130 /* Delete channel.
131 * Must be called on the locked socket. */
132 static void sco_chan_del(struct sock *sk, int err)
134 struct sco_conn *conn;
136 conn = sco_pi(sk)->conn;
138 BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
140 if (conn) {
141 sco_conn_lock(conn);
142 conn->sk = NULL;
143 sco_pi(sk)->conn = NULL;
144 sco_conn_unlock(conn);
146 if (conn->hcon)
147 hci_conn_drop(conn->hcon);
150 sk->sk_state = BT_CLOSED;
151 sk->sk_err = err;
152 sk->sk_state_change(sk);
154 sock_set_flag(sk, SOCK_ZAPPED);
157 static int sco_conn_del(struct hci_conn *hcon, int err)
159 struct sco_conn *conn = hcon->sco_data;
160 struct sock *sk;
162 if (!conn)
163 return 0;
165 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
167 /* Kill socket */
168 sco_conn_lock(conn);
169 sk = conn->sk;
170 sco_conn_unlock(conn);
172 if (sk) {
173 bh_lock_sock(sk);
174 sco_sock_clear_timer(sk);
175 sco_chan_del(sk, err);
176 bh_unlock_sock(sk);
177 sco_sock_kill(sk);
180 hcon->sco_data = NULL;
181 kfree(conn);
182 return 0;
185 static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent)
187 BT_DBG("conn %p", conn);
189 sco_pi(sk)->conn = conn;
190 conn->sk = sk;
192 if (parent)
193 bt_accept_enqueue(parent, sk);
196 static int sco_chan_add(struct sco_conn *conn, struct sock *sk,
197 struct sock *parent)
199 int err = 0;
201 sco_conn_lock(conn);
202 if (conn->sk)
203 err = -EBUSY;
204 else
205 __sco_chan_add(conn, sk, parent);
207 sco_conn_unlock(conn);
208 return err;
211 static int sco_connect(struct sock *sk)
213 struct sco_conn *conn;
214 struct hci_conn *hcon;
215 struct hci_dev *hdev;
216 int err, type;
218 BT_DBG("%pMR -> %pMR", &sco_pi(sk)->src, &sco_pi(sk)->dst);
220 hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src);
221 if (!hdev)
222 return -EHOSTUNREACH;
224 hci_dev_lock(hdev);
226 if (lmp_esco_capable(hdev) && !disable_esco)
227 type = ESCO_LINK;
228 else
229 type = SCO_LINK;
231 if (sco_pi(sk)->setting == BT_VOICE_TRANSPARENT &&
232 (!lmp_transp_capable(hdev) || !lmp_esco_capable(hdev))) {
233 err = -EOPNOTSUPP;
234 goto done;
237 hcon = hci_connect_sco(hdev, type, &sco_pi(sk)->dst,
238 sco_pi(sk)->setting);
239 if (IS_ERR(hcon)) {
240 err = PTR_ERR(hcon);
241 goto done;
244 conn = sco_conn_add(hcon);
245 if (!conn) {
246 hci_conn_drop(hcon);
247 err = -ENOMEM;
248 goto done;
251 /* Update source addr of the socket */
252 bacpy(&sco_pi(sk)->src, &hcon->src);
254 err = sco_chan_add(conn, sk, NULL);
255 if (err)
256 goto done;
258 if (hcon->state == BT_CONNECTED) {
259 sco_sock_clear_timer(sk);
260 sk->sk_state = BT_CONNECTED;
261 } else {
262 sk->sk_state = BT_CONNECT;
263 sco_sock_set_timer(sk, sk->sk_sndtimeo);
266 done:
267 hci_dev_unlock(hdev);
268 hci_dev_put(hdev);
269 return err;
272 static int sco_send_frame(struct sock *sk, struct msghdr *msg, int len)
274 struct sco_conn *conn = sco_pi(sk)->conn;
275 struct sk_buff *skb;
276 int err;
278 /* Check outgoing MTU */
279 if (len > conn->mtu)
280 return -EINVAL;
282 BT_DBG("sk %p len %d", sk, len);
284 skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
285 if (!skb)
286 return err;
288 if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
289 kfree_skb(skb);
290 return -EFAULT;
293 hci_send_sco(conn->hcon, skb);
295 return len;
298 static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb)
300 struct sock *sk;
302 sco_conn_lock(conn);
303 sk = conn->sk;
304 sco_conn_unlock(conn);
306 if (!sk)
307 goto drop;
309 BT_DBG("sk %p len %d", sk, skb->len);
311 if (sk->sk_state != BT_CONNECTED)
312 goto drop;
314 if (!sock_queue_rcv_skb(sk, skb))
315 return;
317 drop:
318 kfree_skb(skb);
321 /* -------- Socket interface ---------- */
322 static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba)
324 struct sock *sk;
326 sk_for_each(sk, &sco_sk_list.head) {
327 if (sk->sk_state != BT_LISTEN)
328 continue;
330 if (!bacmp(&sco_pi(sk)->src, ba))
331 return sk;
334 return NULL;
337 /* Find socket listening on source bdaddr.
338 * Returns closest match.
340 static struct sock *sco_get_sock_listen(bdaddr_t *src)
342 struct sock *sk = NULL, *sk1 = NULL;
344 read_lock(&sco_sk_list.lock);
346 sk_for_each(sk, &sco_sk_list.head) {
347 if (sk->sk_state != BT_LISTEN)
348 continue;
350 /* Exact match. */
351 if (!bacmp(&sco_pi(sk)->src, src))
352 break;
354 /* Closest match */
355 if (!bacmp(&sco_pi(sk)->src, BDADDR_ANY))
356 sk1 = sk;
359 read_unlock(&sco_sk_list.lock);
361 return sk ? sk : sk1;
364 static void sco_sock_destruct(struct sock *sk)
366 BT_DBG("sk %p", sk);
368 skb_queue_purge(&sk->sk_receive_queue);
369 skb_queue_purge(&sk->sk_write_queue);
372 static void sco_sock_cleanup_listen(struct sock *parent)
374 struct sock *sk;
376 BT_DBG("parent %p", parent);
378 /* Close not yet accepted channels */
379 while ((sk = bt_accept_dequeue(parent, NULL))) {
380 sco_sock_close(sk);
381 sco_sock_kill(sk);
384 parent->sk_state = BT_CLOSED;
385 sock_set_flag(parent, SOCK_ZAPPED);
388 /* Kill socket (only if zapped and orphan)
389 * Must be called on unlocked socket.
391 static void sco_sock_kill(struct sock *sk)
393 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
394 return;
396 BT_DBG("sk %p state %d", sk, sk->sk_state);
398 /* Kill poor orphan */
399 bt_sock_unlink(&sco_sk_list, sk);
400 sock_set_flag(sk, SOCK_DEAD);
401 sock_put(sk);
404 static void __sco_sock_close(struct sock *sk)
406 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
408 switch (sk->sk_state) {
409 case BT_LISTEN:
410 sco_sock_cleanup_listen(sk);
411 break;
413 case BT_CONNECTED:
414 case BT_CONFIG:
415 if (sco_pi(sk)->conn->hcon) {
416 sk->sk_state = BT_DISCONN;
417 sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT);
418 hci_conn_drop(sco_pi(sk)->conn->hcon);
419 sco_pi(sk)->conn->hcon = NULL;
420 } else
421 sco_chan_del(sk, ECONNRESET);
422 break;
424 case BT_CONNECT2:
425 case BT_CONNECT:
426 case BT_DISCONN:
427 sco_chan_del(sk, ECONNRESET);
428 break;
430 default:
431 sock_set_flag(sk, SOCK_ZAPPED);
432 break;
436 /* Must be called on unlocked socket. */
437 static void sco_sock_close(struct sock *sk)
439 sco_sock_clear_timer(sk);
440 lock_sock(sk);
441 __sco_sock_close(sk);
442 release_sock(sk);
443 sco_sock_kill(sk);
446 static void sco_sock_init(struct sock *sk, struct sock *parent)
448 BT_DBG("sk %p", sk);
450 if (parent) {
451 sk->sk_type = parent->sk_type;
452 bt_sk(sk)->flags = bt_sk(parent)->flags;
453 security_sk_clone(parent, sk);
457 static struct proto sco_proto = {
458 .name = "SCO",
459 .owner = THIS_MODULE,
460 .obj_size = sizeof(struct sco_pinfo)
463 static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio)
465 struct sock *sk;
467 sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto);
468 if (!sk)
469 return NULL;
471 sock_init_data(sock, sk);
472 INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
474 sk->sk_destruct = sco_sock_destruct;
475 sk->sk_sndtimeo = SCO_CONN_TIMEOUT;
477 sock_reset_flag(sk, SOCK_ZAPPED);
479 sk->sk_protocol = proto;
480 sk->sk_state = BT_OPEN;
482 sco_pi(sk)->setting = BT_VOICE_CVSD_16BIT;
484 setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk);
486 bt_sock_link(&sco_sk_list, sk);
487 return sk;
490 static int sco_sock_create(struct net *net, struct socket *sock, int protocol,
491 int kern)
493 struct sock *sk;
495 BT_DBG("sock %p", sock);
497 sock->state = SS_UNCONNECTED;
499 if (sock->type != SOCK_SEQPACKET)
500 return -ESOCKTNOSUPPORT;
502 sock->ops = &sco_sock_ops;
504 sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC);
505 if (!sk)
506 return -ENOMEM;
508 sco_sock_init(sk, NULL);
509 return 0;
512 static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
514 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
515 struct sock *sk = sock->sk;
516 int err = 0;
518 BT_DBG("sk %p %pMR", sk, &sa->sco_bdaddr);
520 if (!addr || addr->sa_family != AF_BLUETOOTH)
521 return -EINVAL;
523 lock_sock(sk);
525 if (sk->sk_state != BT_OPEN) {
526 err = -EBADFD;
527 goto done;
530 if (sk->sk_type != SOCK_SEQPACKET) {
531 err = -EINVAL;
532 goto done;
535 bacpy(&sco_pi(sk)->src, &sa->sco_bdaddr);
537 sk->sk_state = BT_BOUND;
539 done:
540 release_sock(sk);
541 return err;
544 static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
546 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
547 struct sock *sk = sock->sk;
548 int err;
550 BT_DBG("sk %p", sk);
552 if (alen < sizeof(struct sockaddr_sco) ||
553 addr->sa_family != AF_BLUETOOTH)
554 return -EINVAL;
556 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
557 return -EBADFD;
559 if (sk->sk_type != SOCK_SEQPACKET)
560 return -EINVAL;
562 lock_sock(sk);
564 /* Set destination address and psm */
565 bacpy(&sco_pi(sk)->dst, &sa->sco_bdaddr);
567 err = sco_connect(sk);
568 if (err)
569 goto done;
571 err = bt_sock_wait_state(sk, BT_CONNECTED,
572 sock_sndtimeo(sk, flags & O_NONBLOCK));
574 done:
575 release_sock(sk);
576 return err;
579 static int sco_sock_listen(struct socket *sock, int backlog)
581 struct sock *sk = sock->sk;
582 bdaddr_t *src = &sco_pi(sk)->src;
583 int err = 0;
585 BT_DBG("sk %p backlog %d", sk, backlog);
587 lock_sock(sk);
589 if (sk->sk_state != BT_BOUND) {
590 err = -EBADFD;
591 goto done;
594 if (sk->sk_type != SOCK_SEQPACKET) {
595 err = -EINVAL;
596 goto done;
599 write_lock(&sco_sk_list.lock);
601 if (__sco_get_sock_listen_by_addr(src)) {
602 err = -EADDRINUSE;
603 goto unlock;
606 sk->sk_max_ack_backlog = backlog;
607 sk->sk_ack_backlog = 0;
609 sk->sk_state = BT_LISTEN;
611 unlock:
612 write_unlock(&sco_sk_list.lock);
614 done:
615 release_sock(sk);
616 return err;
619 static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags)
621 DEFINE_WAIT_FUNC(wait, woken_wake_function);
622 struct sock *sk = sock->sk, *ch;
623 long timeo;
624 int err = 0;
626 lock_sock(sk);
628 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
630 BT_DBG("sk %p timeo %ld", sk, timeo);
632 /* Wait for an incoming connection. (wake-one). */
633 add_wait_queue_exclusive(sk_sleep(sk), &wait);
634 while (1) {
635 if (sk->sk_state != BT_LISTEN) {
636 err = -EBADFD;
637 break;
640 ch = bt_accept_dequeue(sk, newsock);
641 if (ch)
642 break;
644 if (!timeo) {
645 err = -EAGAIN;
646 break;
649 if (signal_pending(current)) {
650 err = sock_intr_errno(timeo);
651 break;
654 release_sock(sk);
656 timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);
657 lock_sock(sk);
659 remove_wait_queue(sk_sleep(sk), &wait);
661 if (err)
662 goto done;
664 newsock->state = SS_CONNECTED;
666 BT_DBG("new socket %p", ch);
668 done:
669 release_sock(sk);
670 return err;
673 static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer)
675 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
676 struct sock *sk = sock->sk;
678 BT_DBG("sock %p, sk %p", sock, sk);
680 addr->sa_family = AF_BLUETOOTH;
681 *len = sizeof(struct sockaddr_sco);
683 if (peer)
684 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->dst);
685 else
686 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->src);
688 return 0;
691 static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
692 struct msghdr *msg, size_t len)
694 struct sock *sk = sock->sk;
695 int err;
697 BT_DBG("sock %p, sk %p", sock, sk);
699 err = sock_error(sk);
700 if (err)
701 return err;
703 if (msg->msg_flags & MSG_OOB)
704 return -EOPNOTSUPP;
706 lock_sock(sk);
708 if (sk->sk_state == BT_CONNECTED)
709 err = sco_send_frame(sk, msg, len);
710 else
711 err = -ENOTCONN;
713 release_sock(sk);
714 return err;
717 static void sco_conn_defer_accept(struct hci_conn *conn, u16 setting)
719 struct hci_dev *hdev = conn->hdev;
721 BT_DBG("conn %p", conn);
723 conn->state = BT_CONFIG;
725 if (!lmp_esco_capable(hdev)) {
726 struct hci_cp_accept_conn_req cp;
728 bacpy(&cp.bdaddr, &conn->dst);
729 cp.role = 0x00; /* Ignored */
731 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
732 } else {
733 struct hci_cp_accept_sync_conn_req cp;
735 bacpy(&cp.bdaddr, &conn->dst);
736 cp.pkt_type = cpu_to_le16(conn->pkt_type);
738 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
739 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
740 cp.content_format = cpu_to_le16(setting);
742 switch (setting & SCO_AIRMODE_MASK) {
743 case SCO_AIRMODE_TRANSP:
744 if (conn->pkt_type & ESCO_2EV3)
745 cp.max_latency = cpu_to_le16(0x0008);
746 else
747 cp.max_latency = cpu_to_le16(0x000D);
748 cp.retrans_effort = 0x02;
749 break;
750 case SCO_AIRMODE_CVSD:
751 cp.max_latency = cpu_to_le16(0xffff);
752 cp.retrans_effort = 0xff;
753 break;
756 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ,
757 sizeof(cp), &cp);
761 static int sco_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
762 struct msghdr *msg, size_t len, int flags)
764 struct sock *sk = sock->sk;
765 struct sco_pinfo *pi = sco_pi(sk);
767 lock_sock(sk);
769 if (sk->sk_state == BT_CONNECT2 &&
770 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
771 sco_conn_defer_accept(pi->conn->hcon, pi->setting);
772 sk->sk_state = BT_CONFIG;
774 release_sock(sk);
775 return 0;
778 release_sock(sk);
780 return bt_sock_recvmsg(iocb, sock, msg, len, flags);
783 static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen)
785 struct sock *sk = sock->sk;
786 int len, err = 0;
787 struct bt_voice voice;
788 u32 opt;
790 BT_DBG("sk %p", sk);
792 lock_sock(sk);
794 switch (optname) {
796 case BT_DEFER_SETUP:
797 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
798 err = -EINVAL;
799 break;
802 if (get_user(opt, (u32 __user *) optval)) {
803 err = -EFAULT;
804 break;
807 if (opt)
808 set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
809 else
810 clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
811 break;
813 case BT_VOICE:
814 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
815 sk->sk_state != BT_CONNECT2) {
816 err = -EINVAL;
817 break;
820 voice.setting = sco_pi(sk)->setting;
822 len = min_t(unsigned int, sizeof(voice), optlen);
823 if (copy_from_user((char *) &voice, optval, len)) {
824 err = -EFAULT;
825 break;
828 /* Explicitly check for these values */
829 if (voice.setting != BT_VOICE_TRANSPARENT &&
830 voice.setting != BT_VOICE_CVSD_16BIT) {
831 err = -EINVAL;
832 break;
835 sco_pi(sk)->setting = voice.setting;
836 break;
838 default:
839 err = -ENOPROTOOPT;
840 break;
843 release_sock(sk);
844 return err;
847 static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen)
849 struct sock *sk = sock->sk;
850 struct sco_options opts;
851 struct sco_conninfo cinfo;
852 int len, err = 0;
854 BT_DBG("sk %p", sk);
856 if (get_user(len, optlen))
857 return -EFAULT;
859 lock_sock(sk);
861 switch (optname) {
862 case SCO_OPTIONS:
863 if (sk->sk_state != BT_CONNECTED &&
864 !(sk->sk_state == BT_CONNECT2 &&
865 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
866 err = -ENOTCONN;
867 break;
870 opts.mtu = sco_pi(sk)->conn->mtu;
872 BT_DBG("mtu %d", opts.mtu);
874 len = min_t(unsigned int, len, sizeof(opts));
875 if (copy_to_user(optval, (char *)&opts, len))
876 err = -EFAULT;
878 break;
880 case SCO_CONNINFO:
881 if (sk->sk_state != BT_CONNECTED &&
882 !(sk->sk_state == BT_CONNECT2 &&
883 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
884 err = -ENOTCONN;
885 break;
888 memset(&cinfo, 0, sizeof(cinfo));
889 cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle;
890 memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3);
892 len = min_t(unsigned int, len, sizeof(cinfo));
893 if (copy_to_user(optval, (char *)&cinfo, len))
894 err = -EFAULT;
896 break;
898 default:
899 err = -ENOPROTOOPT;
900 break;
903 release_sock(sk);
904 return err;
907 static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
909 struct sock *sk = sock->sk;
910 int len, err = 0;
911 struct bt_voice voice;
913 BT_DBG("sk %p", sk);
915 if (level == SOL_SCO)
916 return sco_sock_getsockopt_old(sock, optname, optval, optlen);
918 if (get_user(len, optlen))
919 return -EFAULT;
921 lock_sock(sk);
923 switch (optname) {
925 case BT_DEFER_SETUP:
926 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
927 err = -EINVAL;
928 break;
931 if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
932 (u32 __user *) optval))
933 err = -EFAULT;
935 break;
937 case BT_VOICE:
938 voice.setting = sco_pi(sk)->setting;
940 len = min_t(unsigned int, len, sizeof(voice));
941 if (copy_to_user(optval, (char *)&voice, len))
942 err = -EFAULT;
944 break;
946 default:
947 err = -ENOPROTOOPT;
948 break;
951 release_sock(sk);
952 return err;
955 static int sco_sock_shutdown(struct socket *sock, int how)
957 struct sock *sk = sock->sk;
958 int err = 0;
960 BT_DBG("sock %p, sk %p", sock, sk);
962 if (!sk)
963 return 0;
965 lock_sock(sk);
966 if (!sk->sk_shutdown) {
967 sk->sk_shutdown = SHUTDOWN_MASK;
968 sco_sock_clear_timer(sk);
969 __sco_sock_close(sk);
971 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
972 !(current->flags & PF_EXITING))
973 err = bt_sock_wait_state(sk, BT_CLOSED,
974 sk->sk_lingertime);
976 release_sock(sk);
977 return err;
980 static int sco_sock_release(struct socket *sock)
982 struct sock *sk = sock->sk;
983 int err = 0;
985 BT_DBG("sock %p, sk %p", sock, sk);
987 if (!sk)
988 return 0;
990 sco_sock_close(sk);
992 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
993 !(current->flags & PF_EXITING)) {
994 lock_sock(sk);
995 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
996 release_sock(sk);
999 sock_orphan(sk);
1000 sco_sock_kill(sk);
1001 return err;
1004 static void sco_conn_ready(struct sco_conn *conn)
1006 struct sock *parent;
1007 struct sock *sk = conn->sk;
1009 BT_DBG("conn %p", conn);
1011 if (sk) {
1012 sco_sock_clear_timer(sk);
1013 bh_lock_sock(sk);
1014 sk->sk_state = BT_CONNECTED;
1015 sk->sk_state_change(sk);
1016 bh_unlock_sock(sk);
1017 } else {
1018 sco_conn_lock(conn);
1020 parent = sco_get_sock_listen(&conn->hcon->src);
1021 if (!parent) {
1022 sco_conn_unlock(conn);
1023 return;
1026 bh_lock_sock(parent);
1028 sk = sco_sock_alloc(sock_net(parent), NULL,
1029 BTPROTO_SCO, GFP_ATOMIC);
1030 if (!sk) {
1031 bh_unlock_sock(parent);
1032 sco_conn_unlock(conn);
1033 return;
1036 sco_sock_init(sk, parent);
1038 bacpy(&sco_pi(sk)->src, &conn->hcon->src);
1039 bacpy(&sco_pi(sk)->dst, &conn->hcon->dst);
1041 hci_conn_hold(conn->hcon);
1042 __sco_chan_add(conn, sk, parent);
1044 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags))
1045 sk->sk_state = BT_CONNECT2;
1046 else
1047 sk->sk_state = BT_CONNECTED;
1049 /* Wake up parent */
1050 parent->sk_data_ready(parent);
1052 bh_unlock_sock(parent);
1054 sco_conn_unlock(conn);
1058 /* ----- SCO interface with lower layer (HCI) ----- */
1059 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
1061 struct sock *sk;
1062 int lm = 0;
1064 BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr);
1066 /* Find listening sockets */
1067 read_lock(&sco_sk_list.lock);
1068 sk_for_each(sk, &sco_sk_list.head) {
1069 if (sk->sk_state != BT_LISTEN)
1070 continue;
1072 if (!bacmp(&sco_pi(sk)->src, &hdev->bdaddr) ||
1073 !bacmp(&sco_pi(sk)->src, BDADDR_ANY)) {
1074 lm |= HCI_LM_ACCEPT;
1076 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))
1077 *flags |= HCI_PROTO_DEFER;
1078 break;
1081 read_unlock(&sco_sk_list.lock);
1083 return lm;
1086 void sco_connect_cfm(struct hci_conn *hcon, __u8 status)
1088 BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status);
1089 if (!status) {
1090 struct sco_conn *conn;
1092 conn = sco_conn_add(hcon);
1093 if (conn)
1094 sco_conn_ready(conn);
1095 } else
1096 sco_conn_del(hcon, bt_to_errno(status));
1099 void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason)
1101 BT_DBG("hcon %p reason %d", hcon, reason);
1103 sco_conn_del(hcon, bt_to_errno(reason));
1106 int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
1108 struct sco_conn *conn = hcon->sco_data;
1110 if (!conn)
1111 goto drop;
1113 BT_DBG("conn %p len %d", conn, skb->len);
1115 if (skb->len) {
1116 sco_recv_frame(conn, skb);
1117 return 0;
1120 drop:
1121 kfree_skb(skb);
1122 return 0;
1125 static int sco_debugfs_show(struct seq_file *f, void *p)
1127 struct sock *sk;
1129 read_lock(&sco_sk_list.lock);
1131 sk_for_each(sk, &sco_sk_list.head) {
1132 seq_printf(f, "%pMR %pMR %d\n", &sco_pi(sk)->src,
1133 &sco_pi(sk)->dst, sk->sk_state);
1136 read_unlock(&sco_sk_list.lock);
1138 return 0;
1141 static int sco_debugfs_open(struct inode *inode, struct file *file)
1143 return single_open(file, sco_debugfs_show, inode->i_private);
1146 static const struct file_operations sco_debugfs_fops = {
1147 .open = sco_debugfs_open,
1148 .read = seq_read,
1149 .llseek = seq_lseek,
1150 .release = single_release,
1153 static struct dentry *sco_debugfs;
1155 static const struct proto_ops sco_sock_ops = {
1156 .family = PF_BLUETOOTH,
1157 .owner = THIS_MODULE,
1158 .release = sco_sock_release,
1159 .bind = sco_sock_bind,
1160 .connect = sco_sock_connect,
1161 .listen = sco_sock_listen,
1162 .accept = sco_sock_accept,
1163 .getname = sco_sock_getname,
1164 .sendmsg = sco_sock_sendmsg,
1165 .recvmsg = sco_sock_recvmsg,
1166 .poll = bt_sock_poll,
1167 .ioctl = bt_sock_ioctl,
1168 .mmap = sock_no_mmap,
1169 .socketpair = sock_no_socketpair,
1170 .shutdown = sco_sock_shutdown,
1171 .setsockopt = sco_sock_setsockopt,
1172 .getsockopt = sco_sock_getsockopt
1175 static const struct net_proto_family sco_sock_family_ops = {
1176 .family = PF_BLUETOOTH,
1177 .owner = THIS_MODULE,
1178 .create = sco_sock_create,
1181 int __init sco_init(void)
1183 int err;
1185 BUILD_BUG_ON(sizeof(struct sockaddr_sco) > sizeof(struct sockaddr));
1187 err = proto_register(&sco_proto, 0);
1188 if (err < 0)
1189 return err;
1191 err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops);
1192 if (err < 0) {
1193 BT_ERR("SCO socket registration failed");
1194 goto error;
1197 err = bt_procfs_init(&init_net, "sco", &sco_sk_list, NULL);
1198 if (err < 0) {
1199 BT_ERR("Failed to create SCO proc file");
1200 bt_sock_unregister(BTPROTO_SCO);
1201 goto error;
1204 BT_INFO("SCO socket layer initialized");
1206 if (IS_ERR_OR_NULL(bt_debugfs))
1207 return 0;
1209 sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs,
1210 NULL, &sco_debugfs_fops);
1212 return 0;
1214 error:
1215 proto_unregister(&sco_proto);
1216 return err;
1219 void __exit sco_exit(void)
1221 bt_procfs_cleanup(&init_net, "sco");
1223 debugfs_remove(sco_debugfs);
1225 bt_sock_unregister(BTPROTO_SCO);
1227 proto_unregister(&sco_proto);
1230 module_param(disable_esco, bool, 0644);
1231 MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation");