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>
30 #include <linux/sched/signal.h>
32 #include <net/bluetooth/bluetooth.h>
33 #include <net/bluetooth/hci_core.h>
34 #include <net/bluetooth/sco.h>
36 static bool disable_esco;
38 static const struct proto_ops sco_sock_ops;
40 static struct bt_sock_list sco_sk_list = {
41 .lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock)
44 /* ---- SCO connections ---- */
46 struct hci_conn *hcon;
54 #define sco_conn_lock(c) spin_lock(&c->lock);
55 #define sco_conn_unlock(c) spin_unlock(&c->lock);
57 static void sco_sock_close(struct sock *sk);
58 static void sco_sock_kill(struct sock *sk);
60 /* ----- SCO socket info ----- */
61 #define sco_pi(sk) ((struct sco_pinfo *) sk)
69 struct sco_conn *conn;
72 /* ---- SCO timers ---- */
73 #define SCO_CONN_TIMEOUT (HZ * 40)
74 #define SCO_DISCONN_TIMEOUT (HZ * 2)
76 static void sco_sock_timeout(unsigned long arg)
78 struct sock *sk = (struct sock *)arg;
80 BT_DBG("sock %p state %d", sk, sk->sk_state);
83 sk->sk_err = ETIMEDOUT;
84 sk->sk_state_change(sk);
91 static void sco_sock_set_timer(struct sock *sk, long timeout)
93 BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
94 sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout);
97 static void sco_sock_clear_timer(struct sock *sk)
99 BT_DBG("sock %p state %d", sk, sk->sk_state);
100 sk_stop_timer(sk, &sk->sk_timer);
103 /* ---- SCO connections ---- */
104 static struct sco_conn *sco_conn_add(struct hci_conn *hcon)
106 struct hci_dev *hdev = hcon->hdev;
107 struct sco_conn *conn = hcon->sco_data;
112 conn = kzalloc(sizeof(struct sco_conn), GFP_KERNEL);
116 spin_lock_init(&conn->lock);
118 hcon->sco_data = conn;
121 if (hdev->sco_mtu > 0)
122 conn->mtu = hdev->sco_mtu;
126 BT_DBG("hcon %p conn %p", hcon, conn);
132 * Must be called on the locked socket. */
133 static void sco_chan_del(struct sock *sk, int err)
135 struct sco_conn *conn;
137 conn = sco_pi(sk)->conn;
139 BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
144 sco_pi(sk)->conn = NULL;
145 sco_conn_unlock(conn);
148 hci_conn_drop(conn->hcon);
151 sk->sk_state = BT_CLOSED;
153 sk->sk_state_change(sk);
155 sock_set_flag(sk, SOCK_ZAPPED);
158 static void sco_conn_del(struct hci_conn *hcon, int err)
160 struct sco_conn *conn = hcon->sco_data;
166 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
171 sco_conn_unlock(conn);
176 sco_sock_clear_timer(sk);
177 sco_chan_del(sk, err);
183 hcon->sco_data = NULL;
187 static void __sco_chan_add(struct sco_conn *conn, struct sock *sk,
190 BT_DBG("conn %p", conn);
192 sco_pi(sk)->conn = conn;
196 bt_accept_enqueue(parent, sk);
199 static int sco_chan_add(struct sco_conn *conn, struct sock *sk,
208 __sco_chan_add(conn, sk, parent);
210 sco_conn_unlock(conn);
214 static int sco_connect(struct sock *sk)
216 struct sco_conn *conn;
217 struct hci_conn *hcon;
218 struct hci_dev *hdev;
221 BT_DBG("%pMR -> %pMR", &sco_pi(sk)->src, &sco_pi(sk)->dst);
223 hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src, BDADDR_BREDR);
225 return -EHOSTUNREACH;
229 if (lmp_esco_capable(hdev) && !disable_esco)
234 if (sco_pi(sk)->setting == BT_VOICE_TRANSPARENT &&
235 (!lmp_transp_capable(hdev) || !lmp_esco_capable(hdev))) {
240 hcon = hci_connect_sco(hdev, type, &sco_pi(sk)->dst,
241 sco_pi(sk)->setting);
247 conn = sco_conn_add(hcon);
254 /* Update source addr of the socket */
255 bacpy(&sco_pi(sk)->src, &hcon->src);
257 err = sco_chan_add(conn, sk, NULL);
261 if (hcon->state == BT_CONNECTED) {
262 sco_sock_clear_timer(sk);
263 sk->sk_state = BT_CONNECTED;
265 sk->sk_state = BT_CONNECT;
266 sco_sock_set_timer(sk, sk->sk_sndtimeo);
270 hci_dev_unlock(hdev);
275 static int sco_send_frame(struct sock *sk, struct msghdr *msg, int len)
277 struct sco_conn *conn = sco_pi(sk)->conn;
281 /* Check outgoing MTU */
285 BT_DBG("sk %p len %d", sk, len);
287 skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
291 if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
296 hci_send_sco(conn->hcon, skb);
301 static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb)
307 sco_conn_unlock(conn);
312 BT_DBG("sk %p len %d", sk, skb->len);
314 if (sk->sk_state != BT_CONNECTED)
317 if (!sock_queue_rcv_skb(sk, skb))
324 /* -------- Socket interface ---------- */
325 static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba)
329 sk_for_each(sk, &sco_sk_list.head) {
330 if (sk->sk_state != BT_LISTEN)
333 if (!bacmp(&sco_pi(sk)->src, ba))
340 /* Find socket listening on source bdaddr.
341 * Returns closest match.
343 static struct sock *sco_get_sock_listen(bdaddr_t *src)
345 struct sock *sk = NULL, *sk1 = NULL;
347 read_lock(&sco_sk_list.lock);
349 sk_for_each(sk, &sco_sk_list.head) {
350 if (sk->sk_state != BT_LISTEN)
354 if (!bacmp(&sco_pi(sk)->src, src))
358 if (!bacmp(&sco_pi(sk)->src, BDADDR_ANY))
362 read_unlock(&sco_sk_list.lock);
364 return sk ? sk : sk1;
367 static void sco_sock_destruct(struct sock *sk)
371 skb_queue_purge(&sk->sk_receive_queue);
372 skb_queue_purge(&sk->sk_write_queue);
375 static void sco_sock_cleanup_listen(struct sock *parent)
379 BT_DBG("parent %p", parent);
381 /* Close not yet accepted channels */
382 while ((sk = bt_accept_dequeue(parent, NULL))) {
387 parent->sk_state = BT_CLOSED;
388 sock_set_flag(parent, SOCK_ZAPPED);
391 /* Kill socket (only if zapped and orphan)
392 * Must be called on unlocked socket.
394 static void sco_sock_kill(struct sock *sk)
396 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
399 BT_DBG("sk %p state %d", sk, sk->sk_state);
401 /* Kill poor orphan */
402 bt_sock_unlink(&sco_sk_list, sk);
403 sock_set_flag(sk, SOCK_DEAD);
407 static void __sco_sock_close(struct sock *sk)
409 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
411 switch (sk->sk_state) {
413 sco_sock_cleanup_listen(sk);
418 if (sco_pi(sk)->conn->hcon) {
419 sk->sk_state = BT_DISCONN;
420 sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT);
421 sco_conn_lock(sco_pi(sk)->conn);
422 hci_conn_drop(sco_pi(sk)->conn->hcon);
423 sco_pi(sk)->conn->hcon = NULL;
424 sco_conn_unlock(sco_pi(sk)->conn);
426 sco_chan_del(sk, ECONNRESET);
432 sco_chan_del(sk, ECONNRESET);
436 sock_set_flag(sk, SOCK_ZAPPED);
441 /* Must be called on unlocked socket. */
442 static void sco_sock_close(struct sock *sk)
444 sco_sock_clear_timer(sk);
446 __sco_sock_close(sk);
451 static void sco_sock_init(struct sock *sk, struct sock *parent)
456 sk->sk_type = parent->sk_type;
457 bt_sk(sk)->flags = bt_sk(parent)->flags;
458 security_sk_clone(parent, sk);
462 static struct proto sco_proto = {
464 .owner = THIS_MODULE,
465 .obj_size = sizeof(struct sco_pinfo)
468 static struct sock *sco_sock_alloc(struct net *net, struct socket *sock,
469 int proto, gfp_t prio, int kern)
473 sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto, kern);
477 sock_init_data(sock, sk);
478 INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
480 sk->sk_destruct = sco_sock_destruct;
481 sk->sk_sndtimeo = SCO_CONN_TIMEOUT;
483 sock_reset_flag(sk, SOCK_ZAPPED);
485 sk->sk_protocol = proto;
486 sk->sk_state = BT_OPEN;
488 sco_pi(sk)->setting = BT_VOICE_CVSD_16BIT;
490 setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk);
492 bt_sock_link(&sco_sk_list, sk);
496 static int sco_sock_create(struct net *net, struct socket *sock, int protocol,
501 BT_DBG("sock %p", sock);
503 sock->state = SS_UNCONNECTED;
505 if (sock->type != SOCK_SEQPACKET)
506 return -ESOCKTNOSUPPORT;
508 sock->ops = &sco_sock_ops;
510 sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
514 sco_sock_init(sk, NULL);
518 static int sco_sock_bind(struct socket *sock, struct sockaddr *addr,
521 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
522 struct sock *sk = sock->sk;
525 BT_DBG("sk %p %pMR", sk, &sa->sco_bdaddr);
527 if (!addr || addr_len < sizeof(struct sockaddr_sco) ||
528 addr->sa_family != AF_BLUETOOTH)
533 if (sk->sk_state != BT_OPEN) {
538 if (sk->sk_type != SOCK_SEQPACKET) {
543 bacpy(&sco_pi(sk)->src, &sa->sco_bdaddr);
545 sk->sk_state = BT_BOUND;
552 static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
554 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
555 struct sock *sk = sock->sk;
560 if (alen < sizeof(struct sockaddr_sco) ||
561 addr->sa_family != AF_BLUETOOTH)
564 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
567 if (sk->sk_type != SOCK_SEQPACKET)
572 /* Set destination address and psm */
573 bacpy(&sco_pi(sk)->dst, &sa->sco_bdaddr);
575 err = sco_connect(sk);
579 err = bt_sock_wait_state(sk, BT_CONNECTED,
580 sock_sndtimeo(sk, flags & O_NONBLOCK));
587 static int sco_sock_listen(struct socket *sock, int backlog)
589 struct sock *sk = sock->sk;
590 bdaddr_t *src = &sco_pi(sk)->src;
593 BT_DBG("sk %p backlog %d", sk, backlog);
597 if (sk->sk_state != BT_BOUND) {
602 if (sk->sk_type != SOCK_SEQPACKET) {
607 write_lock(&sco_sk_list.lock);
609 if (__sco_get_sock_listen_by_addr(src)) {
614 sk->sk_max_ack_backlog = backlog;
615 sk->sk_ack_backlog = 0;
617 sk->sk_state = BT_LISTEN;
620 write_unlock(&sco_sk_list.lock);
627 static int sco_sock_accept(struct socket *sock, struct socket *newsock,
628 int flags, bool kern)
630 DEFINE_WAIT_FUNC(wait, woken_wake_function);
631 struct sock *sk = sock->sk, *ch;
637 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
639 BT_DBG("sk %p timeo %ld", sk, timeo);
641 /* Wait for an incoming connection. (wake-one). */
642 add_wait_queue_exclusive(sk_sleep(sk), &wait);
644 if (sk->sk_state != BT_LISTEN) {
649 ch = bt_accept_dequeue(sk, newsock);
658 if (signal_pending(current)) {
659 err = sock_intr_errno(timeo);
665 timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);
668 remove_wait_queue(sk_sleep(sk), &wait);
673 newsock->state = SS_CONNECTED;
675 BT_DBG("new socket %p", ch);
682 static int sco_sock_getname(struct socket *sock, struct sockaddr *addr,
685 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
686 struct sock *sk = sock->sk;
688 BT_DBG("sock %p, sk %p", sock, sk);
690 addr->sa_family = AF_BLUETOOTH;
691 *len = sizeof(struct sockaddr_sco);
694 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->dst);
696 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->src);
701 static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg,
704 struct sock *sk = sock->sk;
707 BT_DBG("sock %p, sk %p", sock, sk);
709 err = sock_error(sk);
713 if (msg->msg_flags & MSG_OOB)
718 if (sk->sk_state == BT_CONNECTED)
719 err = sco_send_frame(sk, msg, len);
727 static void sco_conn_defer_accept(struct hci_conn *conn, u16 setting)
729 struct hci_dev *hdev = conn->hdev;
731 BT_DBG("conn %p", conn);
733 conn->state = BT_CONFIG;
735 if (!lmp_esco_capable(hdev)) {
736 struct hci_cp_accept_conn_req cp;
738 bacpy(&cp.bdaddr, &conn->dst);
739 cp.role = 0x00; /* Ignored */
741 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
743 struct hci_cp_accept_sync_conn_req cp;
745 bacpy(&cp.bdaddr, &conn->dst);
746 cp.pkt_type = cpu_to_le16(conn->pkt_type);
748 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
749 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
750 cp.content_format = cpu_to_le16(setting);
752 switch (setting & SCO_AIRMODE_MASK) {
753 case SCO_AIRMODE_TRANSP:
754 if (conn->pkt_type & ESCO_2EV3)
755 cp.max_latency = cpu_to_le16(0x0008);
757 cp.max_latency = cpu_to_le16(0x000D);
758 cp.retrans_effort = 0x02;
760 case SCO_AIRMODE_CVSD:
761 cp.max_latency = cpu_to_le16(0xffff);
762 cp.retrans_effort = 0xff;
766 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ,
771 static int sco_sock_recvmsg(struct socket *sock, struct msghdr *msg,
772 size_t len, int flags)
774 struct sock *sk = sock->sk;
775 struct sco_pinfo *pi = sco_pi(sk);
779 if (sk->sk_state == BT_CONNECT2 &&
780 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
781 sco_conn_defer_accept(pi->conn->hcon, pi->setting);
782 sk->sk_state = BT_CONFIG;
790 return bt_sock_recvmsg(sock, msg, len, flags);
793 static int sco_sock_setsockopt(struct socket *sock, int level, int optname,
794 char __user *optval, unsigned int optlen)
796 struct sock *sk = sock->sk;
798 struct bt_voice voice;
808 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
813 if (get_user(opt, (u32 __user *) optval)) {
819 set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
821 clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
825 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
826 sk->sk_state != BT_CONNECT2) {
831 voice.setting = sco_pi(sk)->setting;
833 len = min_t(unsigned int, sizeof(voice), optlen);
834 if (copy_from_user((char *)&voice, optval, len)) {
839 /* Explicitly check for these values */
840 if (voice.setting != BT_VOICE_TRANSPARENT &&
841 voice.setting != BT_VOICE_CVSD_16BIT) {
846 sco_pi(sk)->setting = voice.setting;
858 static int sco_sock_getsockopt_old(struct socket *sock, int optname,
859 char __user *optval, int __user *optlen)
861 struct sock *sk = sock->sk;
862 struct sco_options opts;
863 struct sco_conninfo cinfo;
868 if (get_user(len, optlen))
875 if (sk->sk_state != BT_CONNECTED &&
876 !(sk->sk_state == BT_CONNECT2 &&
877 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
882 opts.mtu = sco_pi(sk)->conn->mtu;
884 BT_DBG("mtu %d", opts.mtu);
886 len = min_t(unsigned int, len, sizeof(opts));
887 if (copy_to_user(optval, (char *)&opts, len))
893 if (sk->sk_state != BT_CONNECTED &&
894 !(sk->sk_state == BT_CONNECT2 &&
895 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
900 memset(&cinfo, 0, sizeof(cinfo));
901 cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle;
902 memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3);
904 len = min_t(unsigned int, len, sizeof(cinfo));
905 if (copy_to_user(optval, (char *)&cinfo, len))
919 static int sco_sock_getsockopt(struct socket *sock, int level, int optname,
920 char __user *optval, int __user *optlen)
922 struct sock *sk = sock->sk;
924 struct bt_voice voice;
928 if (level == SOL_SCO)
929 return sco_sock_getsockopt_old(sock, optname, optval, optlen);
931 if (get_user(len, optlen))
939 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
944 if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
945 (u32 __user *)optval))
951 voice.setting = sco_pi(sk)->setting;
953 len = min_t(unsigned int, len, sizeof(voice));
954 if (copy_to_user(optval, (char *)&voice, len))
968 static int sco_sock_shutdown(struct socket *sock, int how)
970 struct sock *sk = sock->sk;
973 BT_DBG("sock %p, sk %p", sock, sk);
981 if (!sk->sk_shutdown) {
982 sk->sk_shutdown = SHUTDOWN_MASK;
983 sco_sock_clear_timer(sk);
984 __sco_sock_close(sk);
986 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
987 !(current->flags & PF_EXITING))
988 err = bt_sock_wait_state(sk, BT_CLOSED,
998 static int sco_sock_release(struct socket *sock)
1000 struct sock *sk = sock->sk;
1003 BT_DBG("sock %p, sk %p", sock, sk);
1010 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
1011 !(current->flags & PF_EXITING)) {
1013 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
1022 static void sco_conn_ready(struct sco_conn *conn)
1024 struct sock *parent;
1025 struct sock *sk = conn->sk;
1027 BT_DBG("conn %p", conn);
1030 sco_sock_clear_timer(sk);
1032 sk->sk_state = BT_CONNECTED;
1033 sk->sk_state_change(sk);
1036 sco_conn_lock(conn);
1039 sco_conn_unlock(conn);
1043 parent = sco_get_sock_listen(&conn->hcon->src);
1045 sco_conn_unlock(conn);
1049 bh_lock_sock(parent);
1051 sk = sco_sock_alloc(sock_net(parent), NULL,
1052 BTPROTO_SCO, GFP_ATOMIC, 0);
1054 bh_unlock_sock(parent);
1055 sco_conn_unlock(conn);
1059 sco_sock_init(sk, parent);
1061 bacpy(&sco_pi(sk)->src, &conn->hcon->src);
1062 bacpy(&sco_pi(sk)->dst, &conn->hcon->dst);
1064 hci_conn_hold(conn->hcon);
1065 __sco_chan_add(conn, sk, parent);
1067 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags))
1068 sk->sk_state = BT_CONNECT2;
1070 sk->sk_state = BT_CONNECTED;
1072 /* Wake up parent */
1073 parent->sk_data_ready(parent);
1075 bh_unlock_sock(parent);
1077 sco_conn_unlock(conn);
1081 /* ----- SCO interface with lower layer (HCI) ----- */
1082 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
1087 BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr);
1089 /* Find listening sockets */
1090 read_lock(&sco_sk_list.lock);
1091 sk_for_each(sk, &sco_sk_list.head) {
1092 if (sk->sk_state != BT_LISTEN)
1095 if (!bacmp(&sco_pi(sk)->src, &hdev->bdaddr) ||
1096 !bacmp(&sco_pi(sk)->src, BDADDR_ANY)) {
1097 lm |= HCI_LM_ACCEPT;
1099 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))
1100 *flags |= HCI_PROTO_DEFER;
1104 read_unlock(&sco_sk_list.lock);
1109 static void sco_connect_cfm(struct hci_conn *hcon, __u8 status)
1111 if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
1114 BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status);
1117 struct sco_conn *conn;
1119 conn = sco_conn_add(hcon);
1121 sco_conn_ready(conn);
1123 sco_conn_del(hcon, bt_to_errno(status));
1126 static void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason)
1128 if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
1131 BT_DBG("hcon %p reason %d", hcon, reason);
1133 sco_conn_del(hcon, bt_to_errno(reason));
1136 void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
1138 struct sco_conn *conn = hcon->sco_data;
1143 BT_DBG("conn %p len %d", conn, skb->len);
1146 sco_recv_frame(conn, skb);
1154 static struct hci_cb sco_cb = {
1156 .connect_cfm = sco_connect_cfm,
1157 .disconn_cfm = sco_disconn_cfm,
1160 static int sco_debugfs_show(struct seq_file *f, void *p)
1164 read_lock(&sco_sk_list.lock);
1166 sk_for_each(sk, &sco_sk_list.head) {
1167 seq_printf(f, "%pMR %pMR %d\n", &sco_pi(sk)->src,
1168 &sco_pi(sk)->dst, sk->sk_state);
1171 read_unlock(&sco_sk_list.lock);
1176 static int sco_debugfs_open(struct inode *inode, struct file *file)
1178 return single_open(file, sco_debugfs_show, inode->i_private);
1181 static const struct file_operations sco_debugfs_fops = {
1182 .open = sco_debugfs_open,
1184 .llseek = seq_lseek,
1185 .release = single_release,
1188 static struct dentry *sco_debugfs;
1190 static const struct proto_ops sco_sock_ops = {
1191 .family = PF_BLUETOOTH,
1192 .owner = THIS_MODULE,
1193 .release = sco_sock_release,
1194 .bind = sco_sock_bind,
1195 .connect = sco_sock_connect,
1196 .listen = sco_sock_listen,
1197 .accept = sco_sock_accept,
1198 .getname = sco_sock_getname,
1199 .sendmsg = sco_sock_sendmsg,
1200 .recvmsg = sco_sock_recvmsg,
1201 .poll = bt_sock_poll,
1202 .ioctl = bt_sock_ioctl,
1203 .mmap = sock_no_mmap,
1204 .socketpair = sock_no_socketpair,
1205 .shutdown = sco_sock_shutdown,
1206 .setsockopt = sco_sock_setsockopt,
1207 .getsockopt = sco_sock_getsockopt
1210 static const struct net_proto_family sco_sock_family_ops = {
1211 .family = PF_BLUETOOTH,
1212 .owner = THIS_MODULE,
1213 .create = sco_sock_create,
1216 int __init sco_init(void)
1220 BUILD_BUG_ON(sizeof(struct sockaddr_sco) > sizeof(struct sockaddr));
1222 err = proto_register(&sco_proto, 0);
1226 err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops);
1228 BT_ERR("SCO socket registration failed");
1232 err = bt_procfs_init(&init_net, "sco", &sco_sk_list, NULL);
1234 BT_ERR("Failed to create SCO proc file");
1235 bt_sock_unregister(BTPROTO_SCO);
1239 BT_INFO("SCO socket layer initialized");
1241 hci_register_cb(&sco_cb);
1243 if (IS_ERR_OR_NULL(bt_debugfs))
1246 sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs,
1247 NULL, &sco_debugfs_fops);
1252 proto_unregister(&sco_proto);
1258 bt_procfs_cleanup(&init_net, "sco");
1260 debugfs_remove(sco_debugfs);
1262 hci_unregister_cb(&sco_cb);
1264 bt_sock_unregister(BTPROTO_SCO);
1266 proto_unregister(&sco_proto);
1269 module_param(disable_esco, bool, 0644);
1270 MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation");