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;
51 struct delayed_work timeout_work;
56 #define sco_conn_lock(c) spin_lock(&c->lock);
57 #define sco_conn_unlock(c) spin_unlock(&c->lock);
59 static void sco_sock_close(struct sock *sk);
60 static void sco_sock_kill(struct sock *sk);
62 /* ----- SCO socket info ----- */
63 #define sco_pi(sk) ((struct sco_pinfo *) sk)
71 struct sco_conn *conn;
74 /* ---- SCO timers ---- */
75 #define SCO_CONN_TIMEOUT (HZ * 40)
76 #define SCO_DISCONN_TIMEOUT (HZ * 2)
78 static void sco_sock_timeout(struct work_struct *work)
80 struct sco_conn *conn = container_of(work, struct sco_conn,
88 sco_conn_unlock(conn);
93 BT_DBG("sock %p state %d", sk, sk->sk_state);
96 sk->sk_err = ETIMEDOUT;
97 sk->sk_state_change(sk);
103 static void sco_sock_set_timer(struct sock *sk, long timeout)
105 if (!sco_pi(sk)->conn)
108 BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
109 cancel_delayed_work(&sco_pi(sk)->conn->timeout_work);
110 schedule_delayed_work(&sco_pi(sk)->conn->timeout_work, timeout);
113 static void sco_sock_clear_timer(struct sock *sk)
115 if (!sco_pi(sk)->conn)
118 BT_DBG("sock %p state %d", sk, sk->sk_state);
119 cancel_delayed_work(&sco_pi(sk)->conn->timeout_work);
122 /* ---- SCO connections ---- */
123 static struct sco_conn *sco_conn_add(struct hci_conn *hcon)
125 struct hci_dev *hdev = hcon->hdev;
126 struct sco_conn *conn = hcon->sco_data;
131 conn = kzalloc(sizeof(struct sco_conn), GFP_KERNEL);
135 spin_lock_init(&conn->lock);
137 hcon->sco_data = conn;
140 if (hdev->sco_mtu > 0)
141 conn->mtu = hdev->sco_mtu;
145 BT_DBG("hcon %p conn %p", hcon, conn);
151 * Must be called on the locked socket. */
152 static void sco_chan_del(struct sock *sk, int err)
154 struct sco_conn *conn;
156 conn = sco_pi(sk)->conn;
158 BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
163 sco_pi(sk)->conn = NULL;
164 sco_conn_unlock(conn);
167 hci_conn_drop(conn->hcon);
170 sk->sk_state = BT_CLOSED;
172 sk->sk_state_change(sk);
174 sock_set_flag(sk, SOCK_ZAPPED);
177 static void sco_conn_del(struct hci_conn *hcon, int err)
179 struct sco_conn *conn = hcon->sco_data;
185 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
190 sco_conn_unlock(conn);
195 sco_sock_clear_timer(sk);
196 sco_chan_del(sk, err);
200 /* Ensure no more work items will run before freeing conn. */
201 cancel_delayed_work_sync(&conn->timeout_work);
204 hcon->sco_data = NULL;
208 static void __sco_chan_add(struct sco_conn *conn, struct sock *sk,
211 BT_DBG("conn %p", conn);
213 sco_pi(sk)->conn = conn;
216 INIT_DELAYED_WORK(&conn->timeout_work, sco_sock_timeout);
219 bt_accept_enqueue(parent, sk, true);
222 static int sco_chan_add(struct sco_conn *conn, struct sock *sk,
231 __sco_chan_add(conn, sk, parent);
233 sco_conn_unlock(conn);
237 static int sco_connect(struct hci_dev *hdev, struct sock *sk)
239 struct sco_conn *conn;
240 struct hci_conn *hcon;
243 BT_DBG("%pMR -> %pMR", &sco_pi(sk)->src, &sco_pi(sk)->dst);
245 if (lmp_esco_capable(hdev) && !disable_esco)
250 if (sco_pi(sk)->setting == BT_VOICE_TRANSPARENT &&
251 (!lmp_transp_capable(hdev) || !lmp_esco_capable(hdev)))
254 hcon = hci_connect_sco(hdev, type, &sco_pi(sk)->dst,
255 sco_pi(sk)->setting);
257 return PTR_ERR(hcon);
259 conn = sco_conn_add(hcon);
265 /* Update source addr of the socket */
266 bacpy(&sco_pi(sk)->src, &hcon->src);
268 err = sco_chan_add(conn, sk, NULL);
272 if (hcon->state == BT_CONNECTED) {
273 sco_sock_clear_timer(sk);
274 sk->sk_state = BT_CONNECTED;
276 sk->sk_state = BT_CONNECT;
277 sco_sock_set_timer(sk, sk->sk_sndtimeo);
283 static int sco_send_frame(struct sock *sk, struct msghdr *msg, int len)
285 struct sco_conn *conn = sco_pi(sk)->conn;
289 /* Check outgoing MTU */
293 BT_DBG("sk %p len %d", sk, len);
295 skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
299 if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
304 hci_send_sco(conn->hcon, skb);
309 static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb)
315 sco_conn_unlock(conn);
320 BT_DBG("sk %p len %d", sk, skb->len);
322 if (sk->sk_state != BT_CONNECTED)
325 if (!sock_queue_rcv_skb(sk, skb))
332 /* -------- Socket interface ---------- */
333 static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba)
337 sk_for_each(sk, &sco_sk_list.head) {
338 if (sk->sk_state != BT_LISTEN)
341 if (!bacmp(&sco_pi(sk)->src, ba))
348 /* Find socket listening on source bdaddr.
349 * Returns closest match.
351 static struct sock *sco_get_sock_listen(bdaddr_t *src)
353 struct sock *sk = NULL, *sk1 = NULL;
355 read_lock(&sco_sk_list.lock);
357 sk_for_each(sk, &sco_sk_list.head) {
358 if (sk->sk_state != BT_LISTEN)
362 if (!bacmp(&sco_pi(sk)->src, src))
366 if (!bacmp(&sco_pi(sk)->src, BDADDR_ANY))
370 read_unlock(&sco_sk_list.lock);
372 return sk ? sk : sk1;
375 static void sco_sock_destruct(struct sock *sk)
379 skb_queue_purge(&sk->sk_receive_queue);
380 skb_queue_purge(&sk->sk_write_queue);
383 static void sco_sock_cleanup_listen(struct sock *parent)
387 BT_DBG("parent %p", parent);
389 /* Close not yet accepted channels */
390 while ((sk = bt_accept_dequeue(parent, NULL))) {
395 parent->sk_state = BT_CLOSED;
396 sock_set_flag(parent, SOCK_ZAPPED);
399 /* Kill socket (only if zapped and orphan)
400 * Must be called on unlocked socket.
402 static void sco_sock_kill(struct sock *sk)
404 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
407 BT_DBG("sk %p state %d", sk, sk->sk_state);
409 /* Kill poor orphan */
410 bt_sock_unlink(&sco_sk_list, sk);
411 sock_set_flag(sk, SOCK_DEAD);
415 static void __sco_sock_close(struct sock *sk)
417 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
419 switch (sk->sk_state) {
421 sco_sock_cleanup_listen(sk);
426 if (sco_pi(sk)->conn->hcon) {
427 sk->sk_state = BT_DISCONN;
428 sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT);
429 sco_conn_lock(sco_pi(sk)->conn);
430 hci_conn_drop(sco_pi(sk)->conn->hcon);
431 sco_pi(sk)->conn->hcon = NULL;
432 sco_conn_unlock(sco_pi(sk)->conn);
434 sco_chan_del(sk, ECONNRESET);
440 sco_chan_del(sk, ECONNRESET);
444 sock_set_flag(sk, SOCK_ZAPPED);
449 /* Must be called on unlocked socket. */
450 static void sco_sock_close(struct sock *sk)
452 sco_sock_clear_timer(sk);
454 __sco_sock_close(sk);
458 static void sco_sock_init(struct sock *sk, struct sock *parent)
463 sk->sk_type = parent->sk_type;
464 bt_sk(sk)->flags = bt_sk(parent)->flags;
465 security_sk_clone(parent, sk);
469 static struct proto sco_proto = {
471 .owner = THIS_MODULE,
472 .obj_size = sizeof(struct sco_pinfo)
475 static struct sock *sco_sock_alloc(struct net *net, struct socket *sock,
476 int proto, gfp_t prio, int kern)
480 sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto, kern);
484 sock_init_data(sock, sk);
485 INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
487 sk->sk_destruct = sco_sock_destruct;
488 sk->sk_sndtimeo = SCO_CONN_TIMEOUT;
490 sock_reset_flag(sk, SOCK_ZAPPED);
492 sk->sk_protocol = proto;
493 sk->sk_state = BT_OPEN;
495 sco_pi(sk)->setting = BT_VOICE_CVSD_16BIT;
497 bt_sock_link(&sco_sk_list, sk);
501 static int sco_sock_create(struct net *net, struct socket *sock, int protocol,
506 BT_DBG("sock %p", sock);
508 sock->state = SS_UNCONNECTED;
510 if (sock->type != SOCK_SEQPACKET)
511 return -ESOCKTNOSUPPORT;
513 sock->ops = &sco_sock_ops;
515 sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
519 sco_sock_init(sk, NULL);
523 static int sco_sock_bind(struct socket *sock, struct sockaddr *addr,
526 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
527 struct sock *sk = sock->sk;
530 BT_DBG("sk %p %pMR", sk, &sa->sco_bdaddr);
532 if (!addr || addr_len < sizeof(struct sockaddr_sco) ||
533 addr->sa_family != AF_BLUETOOTH)
538 if (sk->sk_state != BT_OPEN) {
543 if (sk->sk_type != SOCK_SEQPACKET) {
548 bacpy(&sco_pi(sk)->src, &sa->sco_bdaddr);
550 sk->sk_state = BT_BOUND;
557 static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
559 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
560 struct sock *sk = sock->sk;
561 struct hci_dev *hdev;
566 if (alen < sizeof(struct sockaddr_sco) ||
567 addr->sa_family != AF_BLUETOOTH)
570 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
573 if (sk->sk_type != SOCK_SEQPACKET)
576 hdev = hci_get_route(&sa->sco_bdaddr, &sco_pi(sk)->src, BDADDR_BREDR);
578 return -EHOSTUNREACH;
583 /* Set destination address and psm */
584 bacpy(&sco_pi(sk)->dst, &sa->sco_bdaddr);
586 err = sco_connect(hdev, sk);
587 hci_dev_unlock(hdev);
592 err = bt_sock_wait_state(sk, BT_CONNECTED,
593 sock_sndtimeo(sk, flags & O_NONBLOCK));
600 static int sco_sock_listen(struct socket *sock, int backlog)
602 struct sock *sk = sock->sk;
603 bdaddr_t *src = &sco_pi(sk)->src;
606 BT_DBG("sk %p backlog %d", sk, backlog);
610 if (sk->sk_state != BT_BOUND) {
615 if (sk->sk_type != SOCK_SEQPACKET) {
620 write_lock(&sco_sk_list.lock);
622 if (__sco_get_sock_listen_by_addr(src)) {
627 sk->sk_max_ack_backlog = backlog;
628 sk->sk_ack_backlog = 0;
630 sk->sk_state = BT_LISTEN;
633 write_unlock(&sco_sk_list.lock);
640 static int sco_sock_accept(struct socket *sock, struct socket *newsock,
641 int flags, bool kern)
643 DEFINE_WAIT_FUNC(wait, woken_wake_function);
644 struct sock *sk = sock->sk, *ch;
650 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
652 BT_DBG("sk %p timeo %ld", sk, timeo);
654 /* Wait for an incoming connection. (wake-one). */
655 add_wait_queue_exclusive(sk_sleep(sk), &wait);
657 if (sk->sk_state != BT_LISTEN) {
662 ch = bt_accept_dequeue(sk, newsock);
671 if (signal_pending(current)) {
672 err = sock_intr_errno(timeo);
678 timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);
681 remove_wait_queue(sk_sleep(sk), &wait);
686 newsock->state = SS_CONNECTED;
688 BT_DBG("new socket %p", ch);
695 static int sco_sock_getname(struct socket *sock, struct sockaddr *addr,
698 struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
699 struct sock *sk = sock->sk;
701 BT_DBG("sock %p, sk %p", sock, sk);
703 addr->sa_family = AF_BLUETOOTH;
706 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->dst);
708 bacpy(&sa->sco_bdaddr, &sco_pi(sk)->src);
710 return sizeof(struct sockaddr_sco);
713 static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg,
716 struct sock *sk = sock->sk;
719 BT_DBG("sock %p, sk %p", sock, sk);
721 err = sock_error(sk);
725 if (msg->msg_flags & MSG_OOB)
730 if (sk->sk_state == BT_CONNECTED)
731 err = sco_send_frame(sk, msg, len);
739 static void sco_conn_defer_accept(struct hci_conn *conn, u16 setting)
741 struct hci_dev *hdev = conn->hdev;
743 BT_DBG("conn %p", conn);
745 conn->state = BT_CONFIG;
747 if (!lmp_esco_capable(hdev)) {
748 struct hci_cp_accept_conn_req cp;
750 bacpy(&cp.bdaddr, &conn->dst);
751 cp.role = 0x00; /* Ignored */
753 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
755 struct hci_cp_accept_sync_conn_req cp;
757 bacpy(&cp.bdaddr, &conn->dst);
758 cp.pkt_type = cpu_to_le16(conn->pkt_type);
760 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
761 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
762 cp.content_format = cpu_to_le16(setting);
764 switch (setting & SCO_AIRMODE_MASK) {
765 case SCO_AIRMODE_TRANSP:
766 if (conn->pkt_type & ESCO_2EV3)
767 cp.max_latency = cpu_to_le16(0x0008);
769 cp.max_latency = cpu_to_le16(0x000D);
770 cp.retrans_effort = 0x02;
772 case SCO_AIRMODE_CVSD:
773 cp.max_latency = cpu_to_le16(0xffff);
774 cp.retrans_effort = 0xff;
777 /* use CVSD settings as fallback */
778 cp.max_latency = cpu_to_le16(0xffff);
779 cp.retrans_effort = 0xff;
783 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ,
788 static int sco_sock_recvmsg(struct socket *sock, struct msghdr *msg,
789 size_t len, int flags)
791 struct sock *sk = sock->sk;
792 struct sco_pinfo *pi = sco_pi(sk);
796 if (sk->sk_state == BT_CONNECT2 &&
797 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
798 sco_conn_defer_accept(pi->conn->hcon, pi->setting);
799 sk->sk_state = BT_CONFIG;
807 return bt_sock_recvmsg(sock, msg, len, flags);
810 static int sco_sock_setsockopt(struct socket *sock, int level, int optname,
811 char __user *optval, unsigned int optlen)
813 struct sock *sk = sock->sk;
815 struct bt_voice voice;
825 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
830 if (get_user(opt, (u32 __user *) optval)) {
836 set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
838 clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
842 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
843 sk->sk_state != BT_CONNECT2) {
848 voice.setting = sco_pi(sk)->setting;
850 len = min_t(unsigned int, sizeof(voice), optlen);
851 if (copy_from_user((char *)&voice, optval, len)) {
856 /* Explicitly check for these values */
857 if (voice.setting != BT_VOICE_TRANSPARENT &&
858 voice.setting != BT_VOICE_CVSD_16BIT) {
863 sco_pi(sk)->setting = voice.setting;
875 static int sco_sock_getsockopt_old(struct socket *sock, int optname,
876 char __user *optval, int __user *optlen)
878 struct sock *sk = sock->sk;
879 struct sco_options opts;
880 struct sco_conninfo cinfo;
885 if (get_user(len, optlen))
892 if (sk->sk_state != BT_CONNECTED &&
893 !(sk->sk_state == BT_CONNECT2 &&
894 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
899 opts.mtu = sco_pi(sk)->conn->mtu;
901 BT_DBG("mtu %d", opts.mtu);
903 len = min_t(unsigned int, len, sizeof(opts));
904 if (copy_to_user(optval, (char *)&opts, len))
910 if (sk->sk_state != BT_CONNECTED &&
911 !(sk->sk_state == BT_CONNECT2 &&
912 test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
917 memset(&cinfo, 0, sizeof(cinfo));
918 cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle;
919 memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3);
921 len = min_t(unsigned int, len, sizeof(cinfo));
922 if (copy_to_user(optval, (char *)&cinfo, len))
936 static int sco_sock_getsockopt(struct socket *sock, int level, int optname,
937 char __user *optval, int __user *optlen)
939 struct sock *sk = sock->sk;
941 struct bt_voice voice;
945 if (level == SOL_SCO)
946 return sco_sock_getsockopt_old(sock, optname, optval, optlen);
948 if (get_user(len, optlen))
956 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
961 if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
962 (u32 __user *)optval))
968 voice.setting = sco_pi(sk)->setting;
970 len = min_t(unsigned int, len, sizeof(voice));
971 if (copy_to_user(optval, (char *)&voice, len))
985 static int sco_sock_shutdown(struct socket *sock, int how)
987 struct sock *sk = sock->sk;
990 BT_DBG("sock %p, sk %p", sock, sk);
998 if (!sk->sk_shutdown) {
999 sk->sk_shutdown = SHUTDOWN_MASK;
1000 sco_sock_clear_timer(sk);
1001 __sco_sock_close(sk);
1003 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
1004 !(current->flags & PF_EXITING))
1005 err = bt_sock_wait_state(sk, BT_CLOSED,
1015 static int sco_sock_release(struct socket *sock)
1017 struct sock *sk = sock->sk;
1020 BT_DBG("sock %p, sk %p", sock, sk);
1027 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
1028 !(current->flags & PF_EXITING)) {
1030 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
1039 static void sco_conn_ready(struct sco_conn *conn)
1041 struct sock *parent;
1042 struct sock *sk = conn->sk;
1044 BT_DBG("conn %p", conn);
1047 sco_sock_clear_timer(sk);
1049 sk->sk_state = BT_CONNECTED;
1050 sk->sk_state_change(sk);
1053 sco_conn_lock(conn);
1056 sco_conn_unlock(conn);
1060 parent = sco_get_sock_listen(&conn->hcon->src);
1062 sco_conn_unlock(conn);
1066 bh_lock_sock(parent);
1068 sk = sco_sock_alloc(sock_net(parent), NULL,
1069 BTPROTO_SCO, GFP_ATOMIC, 0);
1071 bh_unlock_sock(parent);
1072 sco_conn_unlock(conn);
1076 sco_sock_init(sk, parent);
1078 bacpy(&sco_pi(sk)->src, &conn->hcon->src);
1079 bacpy(&sco_pi(sk)->dst, &conn->hcon->dst);
1081 hci_conn_hold(conn->hcon);
1082 __sco_chan_add(conn, sk, parent);
1084 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags))
1085 sk->sk_state = BT_CONNECT2;
1087 sk->sk_state = BT_CONNECTED;
1089 /* Wake up parent */
1090 parent->sk_data_ready(parent);
1092 bh_unlock_sock(parent);
1094 sco_conn_unlock(conn);
1098 /* ----- SCO interface with lower layer (HCI) ----- */
1099 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
1104 BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr);
1106 /* Find listening sockets */
1107 read_lock(&sco_sk_list.lock);
1108 sk_for_each(sk, &sco_sk_list.head) {
1109 if (sk->sk_state != BT_LISTEN)
1112 if (!bacmp(&sco_pi(sk)->src, &hdev->bdaddr) ||
1113 !bacmp(&sco_pi(sk)->src, BDADDR_ANY)) {
1114 lm |= HCI_LM_ACCEPT;
1116 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))
1117 *flags |= HCI_PROTO_DEFER;
1121 read_unlock(&sco_sk_list.lock);
1126 static void sco_connect_cfm(struct hci_conn *hcon, __u8 status)
1128 if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
1131 BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status);
1134 struct sco_conn *conn;
1136 conn = sco_conn_add(hcon);
1138 sco_conn_ready(conn);
1140 sco_conn_del(hcon, bt_to_errno(status));
1143 static void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason)
1145 if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
1148 BT_DBG("hcon %p reason %d", hcon, reason);
1150 sco_conn_del(hcon, bt_to_errno(reason));
1153 void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
1155 struct sco_conn *conn = hcon->sco_data;
1160 BT_DBG("conn %p len %d", conn, skb->len);
1163 sco_recv_frame(conn, skb);
1171 static struct hci_cb sco_cb = {
1173 .connect_cfm = sco_connect_cfm,
1174 .disconn_cfm = sco_disconn_cfm,
1177 static int sco_debugfs_show(struct seq_file *f, void *p)
1181 read_lock(&sco_sk_list.lock);
1183 sk_for_each(sk, &sco_sk_list.head) {
1184 seq_printf(f, "%pMR %pMR %d\n", &sco_pi(sk)->src,
1185 &sco_pi(sk)->dst, sk->sk_state);
1188 read_unlock(&sco_sk_list.lock);
1193 static int sco_debugfs_open(struct inode *inode, struct file *file)
1195 return single_open(file, sco_debugfs_show, inode->i_private);
1198 static const struct file_operations sco_debugfs_fops = {
1199 .open = sco_debugfs_open,
1201 .llseek = seq_lseek,
1202 .release = single_release,
1205 static struct dentry *sco_debugfs;
1207 static const struct proto_ops sco_sock_ops = {
1208 .family = PF_BLUETOOTH,
1209 .owner = THIS_MODULE,
1210 .release = sco_sock_release,
1211 .bind = sco_sock_bind,
1212 .connect = sco_sock_connect,
1213 .listen = sco_sock_listen,
1214 .accept = sco_sock_accept,
1215 .getname = sco_sock_getname,
1216 .sendmsg = sco_sock_sendmsg,
1217 .recvmsg = sco_sock_recvmsg,
1218 .poll = bt_sock_poll,
1219 .ioctl = bt_sock_ioctl,
1220 .mmap = sock_no_mmap,
1221 .socketpair = sock_no_socketpair,
1222 .shutdown = sco_sock_shutdown,
1223 .setsockopt = sco_sock_setsockopt,
1224 .getsockopt = sco_sock_getsockopt
1227 static const struct net_proto_family sco_sock_family_ops = {
1228 .family = PF_BLUETOOTH,
1229 .owner = THIS_MODULE,
1230 .create = sco_sock_create,
1233 int __init sco_init(void)
1237 BUILD_BUG_ON(sizeof(struct sockaddr_sco) > sizeof(struct sockaddr));
1239 err = proto_register(&sco_proto, 0);
1243 err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops);
1245 BT_ERR("SCO socket registration failed");
1249 err = bt_procfs_init(&init_net, "sco", &sco_sk_list, NULL);
1251 BT_ERR("Failed to create SCO proc file");
1252 bt_sock_unregister(BTPROTO_SCO);
1256 BT_INFO("SCO socket layer initialized");
1258 hci_register_cb(&sco_cb);
1260 if (IS_ERR_OR_NULL(bt_debugfs))
1263 sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs,
1264 NULL, &sco_debugfs_fops);
1269 proto_unregister(&sco_proto);
1275 bt_procfs_cleanup(&init_net, "sco");
1277 debugfs_remove(sco_debugfs);
1279 hci_unregister_cb(&sco_cb);
1281 bt_sock_unregister(BTPROTO_SCO);
1283 proto_unregister(&sco_proto);
1286 module_param(disable_esco, bool, 0644);
1287 MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation");