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-rw-r--r--net/bluetooth/sco.c1499
1 files changed, 1499 insertions, 0 deletions
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
new file mode 100644
index 0000000000..c736186aba
--- /dev/null
+++ b/net/bluetooth/sco.c
@@ -0,0 +1,1499 @@
+/*
+ BlueZ - Bluetooth protocol stack for Linux
+ Copyright (C) 2000-2001 Qualcomm Incorporated
+
+ Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License version 2 as
+ published by the Free Software Foundation;
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+ IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+ CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+ ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+ COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+ SOFTWARE IS DISCLAIMED.
+*/
+
+/* Bluetooth SCO sockets. */
+
+#include <linux/module.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/sched/signal.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/sco.h>
+
+static bool disable_esco;
+
+static const struct proto_ops sco_sock_ops;
+
+static struct bt_sock_list sco_sk_list = {
+ .lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock)
+};
+
+/* ---- SCO connections ---- */
+struct sco_conn {
+ struct hci_conn *hcon;
+
+ spinlock_t lock;
+ struct sock *sk;
+
+ struct delayed_work timeout_work;
+
+ unsigned int mtu;
+};
+
+#define sco_conn_lock(c) spin_lock(&c->lock)
+#define sco_conn_unlock(c) spin_unlock(&c->lock)
+
+static void sco_sock_close(struct sock *sk);
+static void sco_sock_kill(struct sock *sk);
+
+/* ----- SCO socket info ----- */
+#define sco_pi(sk) ((struct sco_pinfo *) sk)
+
+struct sco_pinfo {
+ struct bt_sock bt;
+ bdaddr_t src;
+ bdaddr_t dst;
+ __u32 flags;
+ __u16 setting;
+ struct bt_codec codec;
+ struct sco_conn *conn;
+};
+
+/* ---- SCO timers ---- */
+#define SCO_CONN_TIMEOUT (HZ * 40)
+#define SCO_DISCONN_TIMEOUT (HZ * 2)
+
+static void sco_sock_timeout(struct work_struct *work)
+{
+ struct sco_conn *conn = container_of(work, struct sco_conn,
+ timeout_work.work);
+ struct sock *sk;
+
+ sco_conn_lock(conn);
+ sk = conn->sk;
+ if (sk)
+ sock_hold(sk);
+ sco_conn_unlock(conn);
+
+ if (!sk)
+ return;
+
+ BT_DBG("sock %p state %d", sk, sk->sk_state);
+
+ lock_sock(sk);
+ sk->sk_err = ETIMEDOUT;
+ sk->sk_state_change(sk);
+ release_sock(sk);
+ sock_put(sk);
+}
+
+static void sco_sock_set_timer(struct sock *sk, long timeout)
+{
+ if (!sco_pi(sk)->conn)
+ return;
+
+ BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
+ cancel_delayed_work(&sco_pi(sk)->conn->timeout_work);
+ schedule_delayed_work(&sco_pi(sk)->conn->timeout_work, timeout);
+}
+
+static void sco_sock_clear_timer(struct sock *sk)
+{
+ if (!sco_pi(sk)->conn)
+ return;
+
+ BT_DBG("sock %p state %d", sk, sk->sk_state);
+ cancel_delayed_work(&sco_pi(sk)->conn->timeout_work);
+}
+
+/* ---- SCO connections ---- */
+static struct sco_conn *sco_conn_add(struct hci_conn *hcon)
+{
+ struct hci_dev *hdev = hcon->hdev;
+ struct sco_conn *conn = hcon->sco_data;
+
+ if (conn) {
+ if (!conn->hcon)
+ conn->hcon = hcon;
+ return conn;
+ }
+
+ conn = kzalloc(sizeof(struct sco_conn), GFP_KERNEL);
+ if (!conn)
+ return NULL;
+
+ spin_lock_init(&conn->lock);
+ INIT_DELAYED_WORK(&conn->timeout_work, sco_sock_timeout);
+
+ hcon->sco_data = conn;
+ conn->hcon = hcon;
+
+ if (hdev->sco_mtu > 0)
+ conn->mtu = hdev->sco_mtu;
+ else
+ conn->mtu = 60;
+
+ BT_DBG("hcon %p conn %p", hcon, conn);
+
+ return conn;
+}
+
+/* Delete channel.
+ * Must be called on the locked socket. */
+static void sco_chan_del(struct sock *sk, int err)
+{
+ struct sco_conn *conn;
+
+ conn = sco_pi(sk)->conn;
+
+ BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
+
+ if (conn) {
+ sco_conn_lock(conn);
+ conn->sk = NULL;
+ sco_pi(sk)->conn = NULL;
+ sco_conn_unlock(conn);
+
+ if (conn->hcon)
+ hci_conn_drop(conn->hcon);
+ }
+
+ sk->sk_state = BT_CLOSED;
+ sk->sk_err = err;
+ sk->sk_state_change(sk);
+
+ sock_set_flag(sk, SOCK_ZAPPED);
+}
+
+static void sco_conn_del(struct hci_conn *hcon, int err)
+{
+ struct sco_conn *conn = hcon->sco_data;
+ struct sock *sk;
+
+ if (!conn)
+ return;
+
+ BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
+
+ /* Kill socket */
+ sco_conn_lock(conn);
+ sk = conn->sk;
+ if (sk)
+ sock_hold(sk);
+ sco_conn_unlock(conn);
+
+ if (sk) {
+ lock_sock(sk);
+ sco_sock_clear_timer(sk);
+ sco_chan_del(sk, err);
+ release_sock(sk);
+ sock_put(sk);
+ }
+
+ /* Ensure no more work items will run before freeing conn. */
+ cancel_delayed_work_sync(&conn->timeout_work);
+
+ hcon->sco_data = NULL;
+ kfree(conn);
+}
+
+static void __sco_chan_add(struct sco_conn *conn, struct sock *sk,
+ struct sock *parent)
+{
+ BT_DBG("conn %p", conn);
+
+ sco_pi(sk)->conn = conn;
+ conn->sk = sk;
+
+ if (parent)
+ bt_accept_enqueue(parent, sk, true);
+}
+
+static int sco_chan_add(struct sco_conn *conn, struct sock *sk,
+ struct sock *parent)
+{
+ int err = 0;
+
+ sco_conn_lock(conn);
+ if (conn->sk)
+ err = -EBUSY;
+ else
+ __sco_chan_add(conn, sk, parent);
+
+ sco_conn_unlock(conn);
+ return err;
+}
+
+static int sco_connect(struct sock *sk)
+{
+ struct sco_conn *conn;
+ struct hci_conn *hcon;
+ struct hci_dev *hdev;
+ int err, type;
+
+ BT_DBG("%pMR -> %pMR", &sco_pi(sk)->src, &sco_pi(sk)->dst);
+
+ hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src, BDADDR_BREDR);
+ if (!hdev)
+ return -EHOSTUNREACH;
+
+ hci_dev_lock(hdev);
+
+ if (lmp_esco_capable(hdev) && !disable_esco)
+ type = ESCO_LINK;
+ else
+ type = SCO_LINK;
+
+ if (sco_pi(sk)->setting == BT_VOICE_TRANSPARENT &&
+ (!lmp_transp_capable(hdev) || !lmp_esco_capable(hdev))) {
+ err = -EOPNOTSUPP;
+ goto unlock;
+ }
+
+ hcon = hci_connect_sco(hdev, type, &sco_pi(sk)->dst,
+ sco_pi(sk)->setting, &sco_pi(sk)->codec);
+ if (IS_ERR(hcon)) {
+ err = PTR_ERR(hcon);
+ goto unlock;
+ }
+
+ conn = sco_conn_add(hcon);
+ if (!conn) {
+ hci_conn_drop(hcon);
+ err = -ENOMEM;
+ goto unlock;
+ }
+
+ lock_sock(sk);
+
+ err = sco_chan_add(conn, sk, NULL);
+ if (err) {
+ release_sock(sk);
+ goto unlock;
+ }
+
+ /* Update source addr of the socket */
+ bacpy(&sco_pi(sk)->src, &hcon->src);
+
+ if (hcon->state == BT_CONNECTED) {
+ sco_sock_clear_timer(sk);
+ sk->sk_state = BT_CONNECTED;
+ } else {
+ sk->sk_state = BT_CONNECT;
+ sco_sock_set_timer(sk, sk->sk_sndtimeo);
+ }
+
+ release_sock(sk);
+
+unlock:
+ hci_dev_unlock(hdev);
+ hci_dev_put(hdev);
+ return err;
+}
+
+static int sco_send_frame(struct sock *sk, struct sk_buff *skb)
+{
+ struct sco_conn *conn = sco_pi(sk)->conn;
+ int len = skb->len;
+
+ /* Check outgoing MTU */
+ if (len > conn->mtu)
+ return -EINVAL;
+
+ BT_DBG("sk %p len %d", sk, len);
+
+ hci_send_sco(conn->hcon, skb);
+
+ return len;
+}
+
+static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb)
+{
+ struct sock *sk;
+
+ sco_conn_lock(conn);
+ sk = conn->sk;
+ sco_conn_unlock(conn);
+
+ if (!sk)
+ goto drop;
+
+ BT_DBG("sk %p len %u", sk, skb->len);
+
+ if (sk->sk_state != BT_CONNECTED)
+ goto drop;
+
+ if (!sock_queue_rcv_skb(sk, skb))
+ return;
+
+drop:
+ kfree_skb(skb);
+}
+
+/* -------- Socket interface ---------- */
+static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba)
+{
+ struct sock *sk;
+
+ sk_for_each(sk, &sco_sk_list.head) {
+ if (sk->sk_state != BT_LISTEN)
+ continue;
+
+ if (!bacmp(&sco_pi(sk)->src, ba))
+ return sk;
+ }
+
+ return NULL;
+}
+
+/* Find socket listening on source bdaddr.
+ * Returns closest match.
+ */
+static struct sock *sco_get_sock_listen(bdaddr_t *src)
+{
+ struct sock *sk = NULL, *sk1 = NULL;
+
+ read_lock(&sco_sk_list.lock);
+
+ sk_for_each(sk, &sco_sk_list.head) {
+ if (sk->sk_state != BT_LISTEN)
+ continue;
+
+ /* Exact match. */
+ if (!bacmp(&sco_pi(sk)->src, src))
+ break;
+
+ /* Closest match */
+ if (!bacmp(&sco_pi(sk)->src, BDADDR_ANY))
+ sk1 = sk;
+ }
+
+ read_unlock(&sco_sk_list.lock);
+
+ return sk ? sk : sk1;
+}
+
+static void sco_sock_destruct(struct sock *sk)
+{
+ BT_DBG("sk %p", sk);
+
+ skb_queue_purge(&sk->sk_receive_queue);
+ skb_queue_purge(&sk->sk_write_queue);
+}
+
+static void sco_sock_cleanup_listen(struct sock *parent)
+{
+ struct sock *sk;
+
+ BT_DBG("parent %p", parent);
+
+ /* Close not yet accepted channels */
+ while ((sk = bt_accept_dequeue(parent, NULL))) {
+ sco_sock_close(sk);
+ sco_sock_kill(sk);
+ }
+
+ parent->sk_state = BT_CLOSED;
+ sock_set_flag(parent, SOCK_ZAPPED);
+}
+
+/* Kill socket (only if zapped and orphan)
+ * Must be called on unlocked socket.
+ */
+static void sco_sock_kill(struct sock *sk)
+{
+ if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
+ return;
+
+ BT_DBG("sk %p state %d", sk, sk->sk_state);
+
+ /* Kill poor orphan */
+ bt_sock_unlink(&sco_sk_list, sk);
+ sock_set_flag(sk, SOCK_DEAD);
+ sock_put(sk);
+}
+
+static void __sco_sock_close(struct sock *sk)
+{
+ BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
+
+ switch (sk->sk_state) {
+ case BT_LISTEN:
+ sco_sock_cleanup_listen(sk);
+ break;
+
+ case BT_CONNECTED:
+ case BT_CONFIG:
+ if (sco_pi(sk)->conn->hcon) {
+ sk->sk_state = BT_DISCONN;
+ sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT);
+ sco_conn_lock(sco_pi(sk)->conn);
+ hci_conn_drop(sco_pi(sk)->conn->hcon);
+ sco_pi(sk)->conn->hcon = NULL;
+ sco_conn_unlock(sco_pi(sk)->conn);
+ } else
+ sco_chan_del(sk, ECONNRESET);
+ break;
+
+ case BT_CONNECT2:
+ case BT_CONNECT:
+ case BT_DISCONN:
+ sco_chan_del(sk, ECONNRESET);
+ break;
+
+ default:
+ sock_set_flag(sk, SOCK_ZAPPED);
+ break;
+ }
+
+}
+
+/* Must be called on unlocked socket. */
+static void sco_sock_close(struct sock *sk)
+{
+ lock_sock(sk);
+ sco_sock_clear_timer(sk);
+ __sco_sock_close(sk);
+ release_sock(sk);
+}
+
+static void sco_sock_init(struct sock *sk, struct sock *parent)
+{
+ BT_DBG("sk %p", sk);
+
+ if (parent) {
+ sk->sk_type = parent->sk_type;
+ bt_sk(sk)->flags = bt_sk(parent)->flags;
+ security_sk_clone(parent, sk);
+ }
+}
+
+static struct proto sco_proto = {
+ .name = "SCO",
+ .owner = THIS_MODULE,
+ .obj_size = sizeof(struct sco_pinfo)
+};
+
+static struct sock *sco_sock_alloc(struct net *net, struct socket *sock,
+ int proto, gfp_t prio, int kern)
+{
+ struct sock *sk;
+
+ sk = bt_sock_alloc(net, sock, &sco_proto, proto, prio, kern);
+ if (!sk)
+ return NULL;
+
+ sk->sk_destruct = sco_sock_destruct;
+ sk->sk_sndtimeo = SCO_CONN_TIMEOUT;
+
+ sco_pi(sk)->setting = BT_VOICE_CVSD_16BIT;
+ sco_pi(sk)->codec.id = BT_CODEC_CVSD;
+ sco_pi(sk)->codec.cid = 0xffff;
+ sco_pi(sk)->codec.vid = 0xffff;
+ sco_pi(sk)->codec.data_path = 0x00;
+
+ bt_sock_link(&sco_sk_list, sk);
+ return sk;
+}
+
+static int sco_sock_create(struct net *net, struct socket *sock, int protocol,
+ int kern)
+{
+ struct sock *sk;
+
+ BT_DBG("sock %p", sock);
+
+ sock->state = SS_UNCONNECTED;
+
+ if (sock->type != SOCK_SEQPACKET)
+ return -ESOCKTNOSUPPORT;
+
+ sock->ops = &sco_sock_ops;
+
+ sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
+ if (!sk)
+ return -ENOMEM;
+
+ sco_sock_init(sk, NULL);
+ return 0;
+}
+
+static int sco_sock_bind(struct socket *sock, struct sockaddr *addr,
+ int addr_len)
+{
+ struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
+ struct sock *sk = sock->sk;
+ int err = 0;
+
+ if (!addr || addr_len < sizeof(struct sockaddr_sco) ||
+ addr->sa_family != AF_BLUETOOTH)
+ return -EINVAL;
+
+ BT_DBG("sk %p %pMR", sk, &sa->sco_bdaddr);
+
+ lock_sock(sk);
+
+ if (sk->sk_state != BT_OPEN) {
+ err = -EBADFD;
+ goto done;
+ }
+
+ if (sk->sk_type != SOCK_SEQPACKET) {
+ err = -EINVAL;
+ goto done;
+ }
+
+ bacpy(&sco_pi(sk)->src, &sa->sco_bdaddr);
+
+ sk->sk_state = BT_BOUND;
+
+done:
+ release_sock(sk);
+ return err;
+}
+
+static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
+{
+ struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
+ struct sock *sk = sock->sk;
+ int err;
+
+ BT_DBG("sk %p", sk);
+
+ if (alen < sizeof(struct sockaddr_sco) ||
+ addr->sa_family != AF_BLUETOOTH)
+ return -EINVAL;
+
+ if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
+ return -EBADFD;
+
+ if (sk->sk_type != SOCK_SEQPACKET)
+ err = -EINVAL;
+
+ lock_sock(sk);
+ /* Set destination address and psm */
+ bacpy(&sco_pi(sk)->dst, &sa->sco_bdaddr);
+ release_sock(sk);
+
+ err = sco_connect(sk);
+ if (err)
+ return err;
+
+ lock_sock(sk);
+
+ err = bt_sock_wait_state(sk, BT_CONNECTED,
+ sock_sndtimeo(sk, flags & O_NONBLOCK));
+
+ release_sock(sk);
+ return err;
+}
+
+static int sco_sock_listen(struct socket *sock, int backlog)
+{
+ struct sock *sk = sock->sk;
+ bdaddr_t *src = &sco_pi(sk)->src;
+ int err = 0;
+
+ BT_DBG("sk %p backlog %d", sk, backlog);
+
+ lock_sock(sk);
+
+ if (sk->sk_state != BT_BOUND) {
+ err = -EBADFD;
+ goto done;
+ }
+
+ if (sk->sk_type != SOCK_SEQPACKET) {
+ err = -EINVAL;
+ goto done;
+ }
+
+ write_lock(&sco_sk_list.lock);
+
+ if (__sco_get_sock_listen_by_addr(src)) {
+ err = -EADDRINUSE;
+ goto unlock;
+ }
+
+ sk->sk_max_ack_backlog = backlog;
+ sk->sk_ack_backlog = 0;
+
+ sk->sk_state = BT_LISTEN;
+
+unlock:
+ write_unlock(&sco_sk_list.lock);
+
+done:
+ release_sock(sk);
+ return err;
+}
+
+static int sco_sock_accept(struct socket *sock, struct socket *newsock,
+ int flags, bool kern)
+{
+ DEFINE_WAIT_FUNC(wait, woken_wake_function);
+ struct sock *sk = sock->sk, *ch;
+ long timeo;
+ int err = 0;
+
+ lock_sock(sk);
+
+ timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
+
+ BT_DBG("sk %p timeo %ld", sk, timeo);
+
+ /* Wait for an incoming connection. (wake-one). */
+ add_wait_queue_exclusive(sk_sleep(sk), &wait);
+ while (1) {
+ if (sk->sk_state != BT_LISTEN) {
+ err = -EBADFD;
+ break;
+ }
+
+ ch = bt_accept_dequeue(sk, newsock);
+ if (ch)
+ break;
+
+ if (!timeo) {
+ err = -EAGAIN;
+ break;
+ }
+
+ if (signal_pending(current)) {
+ err = sock_intr_errno(timeo);
+ break;
+ }
+
+ release_sock(sk);
+
+ timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);
+ lock_sock(sk);
+ }
+ remove_wait_queue(sk_sleep(sk), &wait);
+
+ if (err)
+ goto done;
+
+ newsock->state = SS_CONNECTED;
+
+ BT_DBG("new socket %p", ch);
+
+done:
+ release_sock(sk);
+ return err;
+}
+
+static int sco_sock_getname(struct socket *sock, struct sockaddr *addr,
+ int peer)
+{
+ struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;
+ struct sock *sk = sock->sk;
+
+ BT_DBG("sock %p, sk %p", sock, sk);
+
+ addr->sa_family = AF_BLUETOOTH;
+
+ if (peer)
+ bacpy(&sa->sco_bdaddr, &sco_pi(sk)->dst);
+ else
+ bacpy(&sa->sco_bdaddr, &sco_pi(sk)->src);
+
+ return sizeof(struct sockaddr_sco);
+}
+
+static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg,
+ size_t len)
+{
+ struct sock *sk = sock->sk;
+ struct sk_buff *skb;
+ int err;
+
+ BT_DBG("sock %p, sk %p", sock, sk);
+
+ err = sock_error(sk);
+ if (err)
+ return err;
+
+ if (msg->msg_flags & MSG_OOB)
+ return -EOPNOTSUPP;
+
+ skb = bt_skb_sendmsg(sk, msg, len, len, 0, 0);
+ if (IS_ERR(skb))
+ return PTR_ERR(skb);
+
+ lock_sock(sk);
+
+ if (sk->sk_state == BT_CONNECTED)
+ err = sco_send_frame(sk, skb);
+ else
+ err = -ENOTCONN;
+
+ release_sock(sk);
+
+ if (err < 0)
+ kfree_skb(skb);
+ return err;
+}
+
+static void sco_conn_defer_accept(struct hci_conn *conn, u16 setting)
+{
+ struct hci_dev *hdev = conn->hdev;
+
+ BT_DBG("conn %p", conn);
+
+ conn->state = BT_CONFIG;
+
+ if (!lmp_esco_capable(hdev)) {
+ struct hci_cp_accept_conn_req cp;
+
+ bacpy(&cp.bdaddr, &conn->dst);
+ cp.role = 0x00; /* Ignored */
+
+ hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
+ } else {
+ struct hci_cp_accept_sync_conn_req cp;
+
+ bacpy(&cp.bdaddr, &conn->dst);
+ cp.pkt_type = cpu_to_le16(conn->pkt_type);
+
+ cp.tx_bandwidth = cpu_to_le32(0x00001f40);
+ cp.rx_bandwidth = cpu_to_le32(0x00001f40);
+ cp.content_format = cpu_to_le16(setting);
+
+ switch (setting & SCO_AIRMODE_MASK) {
+ case SCO_AIRMODE_TRANSP:
+ if (conn->pkt_type & ESCO_2EV3)
+ cp.max_latency = cpu_to_le16(0x0008);
+ else
+ cp.max_latency = cpu_to_le16(0x000D);
+ cp.retrans_effort = 0x02;
+ break;
+ case SCO_AIRMODE_CVSD:
+ cp.max_latency = cpu_to_le16(0xffff);
+ cp.retrans_effort = 0xff;
+ break;
+ default:
+ /* use CVSD settings as fallback */
+ cp.max_latency = cpu_to_le16(0xffff);
+ cp.retrans_effort = 0xff;
+ break;
+ }
+
+ hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ,
+ sizeof(cp), &cp);
+ }
+}
+
+static int sco_sock_recvmsg(struct socket *sock, struct msghdr *msg,
+ size_t len, int flags)
+{
+ struct sock *sk = sock->sk;
+ struct sco_pinfo *pi = sco_pi(sk);
+
+ lock_sock(sk);
+
+ if (sk->sk_state == BT_CONNECT2 &&
+ test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
+ sco_conn_defer_accept(pi->conn->hcon, pi->setting);
+ sk->sk_state = BT_CONFIG;
+
+ release_sock(sk);
+ return 0;
+ }
+
+ release_sock(sk);
+
+ return bt_sock_recvmsg(sock, msg, len, flags);
+}
+
+static int sco_sock_setsockopt(struct socket *sock, int level, int optname,
+ sockptr_t optval, unsigned int optlen)
+{
+ struct sock *sk = sock->sk;
+ int len, err = 0;
+ struct bt_voice voice;
+ u32 opt;
+ struct bt_codecs *codecs;
+ struct hci_dev *hdev;
+ __u8 buffer[255];
+
+ BT_DBG("sk %p", sk);
+
+ lock_sock(sk);
+
+ switch (optname) {
+
+ case BT_DEFER_SETUP:
+ if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
+ err = -EINVAL;
+ break;
+ }
+
+ if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
+ err = -EFAULT;
+ break;
+ }
+
+ if (opt)
+ set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
+ else
+ clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
+ break;
+
+ case BT_VOICE:
+ if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
+ sk->sk_state != BT_CONNECT2) {
+ err = -EINVAL;
+ break;
+ }
+
+ voice.setting = sco_pi(sk)->setting;
+
+ len = min_t(unsigned int, sizeof(voice), optlen);
+ if (copy_from_sockptr(&voice, optval, len)) {
+ err = -EFAULT;
+ break;
+ }
+
+ /* Explicitly check for these values */
+ if (voice.setting != BT_VOICE_TRANSPARENT &&
+ voice.setting != BT_VOICE_CVSD_16BIT) {
+ err = -EINVAL;
+ break;
+ }
+
+ sco_pi(sk)->setting = voice.setting;
+ hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src,
+ BDADDR_BREDR);
+ if (!hdev) {
+ err = -EBADFD;
+ break;
+ }
+ if (enhanced_sync_conn_capable(hdev) &&
+ voice.setting == BT_VOICE_TRANSPARENT)
+ sco_pi(sk)->codec.id = BT_CODEC_TRANSPARENT;
+ hci_dev_put(hdev);
+ break;
+
+ case BT_PKT_STATUS:
+ if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
+ err = -EFAULT;
+ break;
+ }
+
+ if (opt)
+ set_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags);
+ else
+ clear_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags);
+ break;
+
+ case BT_CODEC:
+ if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
+ sk->sk_state != BT_CONNECT2) {
+ err = -EINVAL;
+ break;
+ }
+
+ hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src,
+ BDADDR_BREDR);
+ if (!hdev) {
+ err = -EBADFD;
+ break;
+ }
+
+ if (!hci_dev_test_flag(hdev, HCI_OFFLOAD_CODECS_ENABLED)) {
+ hci_dev_put(hdev);
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ if (!hdev->get_data_path_id) {
+ hci_dev_put(hdev);
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ if (optlen < sizeof(struct bt_codecs) ||
+ optlen > sizeof(buffer)) {
+ hci_dev_put(hdev);
+ err = -EINVAL;
+ break;
+ }
+
+ if (copy_from_sockptr(buffer, optval, optlen)) {
+ hci_dev_put(hdev);
+ err = -EFAULT;
+ break;
+ }
+
+ codecs = (void *)buffer;
+
+ if (codecs->num_codecs > 1) {
+ hci_dev_put(hdev);
+ err = -EINVAL;
+ break;
+ }
+
+ sco_pi(sk)->codec = codecs->codecs[0];
+ hci_dev_put(hdev);
+ break;
+
+ default:
+ err = -ENOPROTOOPT;
+ break;
+ }
+
+ release_sock(sk);
+ return err;
+}
+
+static int sco_sock_getsockopt_old(struct socket *sock, int optname,
+ char __user *optval, int __user *optlen)
+{
+ struct sock *sk = sock->sk;
+ struct sco_options opts;
+ struct sco_conninfo cinfo;
+ int len, err = 0;
+
+ BT_DBG("sk %p", sk);
+
+ if (get_user(len, optlen))
+ return -EFAULT;
+
+ lock_sock(sk);
+
+ switch (optname) {
+ case SCO_OPTIONS:
+ if (sk->sk_state != BT_CONNECTED &&
+ !(sk->sk_state == BT_CONNECT2 &&
+ test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
+ err = -ENOTCONN;
+ break;
+ }
+
+ opts.mtu = sco_pi(sk)->conn->mtu;
+
+ BT_DBG("mtu %u", opts.mtu);
+
+ len = min_t(unsigned int, len, sizeof(opts));
+ if (copy_to_user(optval, (char *)&opts, len))
+ err = -EFAULT;
+
+ break;
+
+ case SCO_CONNINFO:
+ if (sk->sk_state != BT_CONNECTED &&
+ !(sk->sk_state == BT_CONNECT2 &&
+ test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) {
+ err = -ENOTCONN;
+ break;
+ }
+
+ memset(&cinfo, 0, sizeof(cinfo));
+ cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle;
+ memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3);
+
+ len = min_t(unsigned int, len, sizeof(cinfo));
+ if (copy_to_user(optval, (char *)&cinfo, len))
+ err = -EFAULT;
+
+ break;
+
+ default:
+ err = -ENOPROTOOPT;
+ break;
+ }
+
+ release_sock(sk);
+ return err;
+}
+
+static int sco_sock_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ struct sock *sk = sock->sk;
+ int len, err = 0;
+ struct bt_voice voice;
+ u32 phys;
+ int buf_len;
+ struct codec_list *c;
+ u8 num_codecs, i, __user *ptr;
+ struct hci_dev *hdev;
+ struct hci_codec_caps *caps;
+ struct bt_codec codec;
+
+ BT_DBG("sk %p", sk);
+
+ if (level == SOL_SCO)
+ return sco_sock_getsockopt_old(sock, optname, optval, optlen);
+
+ if (get_user(len, optlen))
+ return -EFAULT;
+
+ lock_sock(sk);
+
+ switch (optname) {
+
+ case BT_DEFER_SETUP:
+ if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
+ err = -EINVAL;
+ break;
+ }
+
+ if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
+ (u32 __user *)optval))
+ err = -EFAULT;
+
+ break;
+
+ case BT_VOICE:
+ voice.setting = sco_pi(sk)->setting;
+
+ len = min_t(unsigned int, len, sizeof(voice));
+ if (copy_to_user(optval, (char *)&voice, len))
+ err = -EFAULT;
+
+ break;
+
+ case BT_PHY:
+ if (sk->sk_state != BT_CONNECTED) {
+ err = -ENOTCONN;
+ break;
+ }
+
+ phys = hci_conn_get_phy(sco_pi(sk)->conn->hcon);
+
+ if (put_user(phys, (u32 __user *) optval))
+ err = -EFAULT;
+ break;
+
+ case BT_PKT_STATUS:
+ if (put_user(test_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags),
+ (int __user *)optval))
+ err = -EFAULT;
+ break;
+
+ case BT_SNDMTU:
+ case BT_RCVMTU:
+ if (sk->sk_state != BT_CONNECTED) {
+ err = -ENOTCONN;
+ break;
+ }
+
+ if (put_user(sco_pi(sk)->conn->mtu, (u32 __user *)optval))
+ err = -EFAULT;
+ break;
+
+ case BT_CODEC:
+ num_codecs = 0;
+ buf_len = 0;
+
+ hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src, BDADDR_BREDR);
+ if (!hdev) {
+ err = -EBADFD;
+ break;
+ }
+
+ if (!hci_dev_test_flag(hdev, HCI_OFFLOAD_CODECS_ENABLED)) {
+ hci_dev_put(hdev);
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ if (!hdev->get_data_path_id) {
+ hci_dev_put(hdev);
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ release_sock(sk);
+
+ /* find total buffer size required to copy codec + caps */
+ hci_dev_lock(hdev);
+ list_for_each_entry(c, &hdev->local_codecs, list) {
+ if (c->transport != HCI_TRANSPORT_SCO_ESCO)
+ continue;
+ num_codecs++;
+ for (i = 0, caps = c->caps; i < c->num_caps; i++) {
+ buf_len += 1 + caps->len;
+ caps = (void *)&caps->data[caps->len];
+ }
+ buf_len += sizeof(struct bt_codec);
+ }
+ hci_dev_unlock(hdev);
+
+ buf_len += sizeof(struct bt_codecs);
+ if (buf_len > len) {
+ hci_dev_put(hdev);
+ return -ENOBUFS;
+ }
+ ptr = optval;
+
+ if (put_user(num_codecs, ptr)) {
+ hci_dev_put(hdev);
+ return -EFAULT;
+ }
+ ptr += sizeof(num_codecs);
+
+ /* Iterate all the codecs supported over SCO and populate
+ * codec data
+ */
+ hci_dev_lock(hdev);
+ list_for_each_entry(c, &hdev->local_codecs, list) {
+ if (c->transport != HCI_TRANSPORT_SCO_ESCO)
+ continue;
+
+ codec.id = c->id;
+ codec.cid = c->cid;
+ codec.vid = c->vid;
+ err = hdev->get_data_path_id(hdev, &codec.data_path);
+ if (err < 0)
+ break;
+ codec.num_caps = c->num_caps;
+ if (copy_to_user(ptr, &codec, sizeof(codec))) {
+ err = -EFAULT;
+ break;
+ }
+ ptr += sizeof(codec);
+
+ /* find codec capabilities data length */
+ len = 0;
+ for (i = 0, caps = c->caps; i < c->num_caps; i++) {
+ len += 1 + caps->len;
+ caps = (void *)&caps->data[caps->len];
+ }
+
+ /* copy codec capabilities data */
+ if (len && copy_to_user(ptr, c->caps, len)) {
+ err = -EFAULT;
+ break;
+ }
+ ptr += len;
+ }
+
+ hci_dev_unlock(hdev);
+ hci_dev_put(hdev);
+
+ lock_sock(sk);
+
+ if (!err && put_user(buf_len, optlen))
+ err = -EFAULT;
+
+ break;
+
+ default:
+ err = -ENOPROTOOPT;
+ break;
+ }
+
+ release_sock(sk);
+ return err;
+}
+
+static int sco_sock_shutdown(struct socket *sock, int how)
+{
+ struct sock *sk = sock->sk;
+ int err = 0;
+
+ BT_DBG("sock %p, sk %p", sock, sk);
+
+ if (!sk)
+ return 0;
+
+ sock_hold(sk);
+ lock_sock(sk);
+
+ if (!sk->sk_shutdown) {
+ sk->sk_shutdown = SHUTDOWN_MASK;
+ sco_sock_clear_timer(sk);
+ __sco_sock_close(sk);
+
+ if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
+ !(current->flags & PF_EXITING))
+ err = bt_sock_wait_state(sk, BT_CLOSED,
+ sk->sk_lingertime);
+ }
+
+ release_sock(sk);
+ sock_put(sk);
+
+ return err;
+}
+
+static int sco_sock_release(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+ int err = 0;
+
+ BT_DBG("sock %p, sk %p", sock, sk);
+
+ if (!sk)
+ return 0;
+
+ sco_sock_close(sk);
+
+ if (sock_flag(sk, SOCK_LINGER) && READ_ONCE(sk->sk_lingertime) &&
+ !(current->flags & PF_EXITING)) {
+ lock_sock(sk);
+ err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
+ release_sock(sk);
+ }
+
+ sock_orphan(sk);
+ sco_sock_kill(sk);
+ return err;
+}
+
+static void sco_conn_ready(struct sco_conn *conn)
+{
+ struct sock *parent;
+ struct sock *sk = conn->sk;
+
+ BT_DBG("conn %p", conn);
+
+ if (sk) {
+ lock_sock(sk);
+ sco_sock_clear_timer(sk);
+ sk->sk_state = BT_CONNECTED;
+ sk->sk_state_change(sk);
+ release_sock(sk);
+ } else {
+ sco_conn_lock(conn);
+
+ if (!conn->hcon) {
+ sco_conn_unlock(conn);
+ return;
+ }
+
+ parent = sco_get_sock_listen(&conn->hcon->src);
+ if (!parent) {
+ sco_conn_unlock(conn);
+ return;
+ }
+
+ lock_sock(parent);
+
+ sk = sco_sock_alloc(sock_net(parent), NULL,
+ BTPROTO_SCO, GFP_ATOMIC, 0);
+ if (!sk) {
+ release_sock(parent);
+ sco_conn_unlock(conn);
+ return;
+ }
+
+ sco_sock_init(sk, parent);
+
+ bacpy(&sco_pi(sk)->src, &conn->hcon->src);
+ bacpy(&sco_pi(sk)->dst, &conn->hcon->dst);
+
+ hci_conn_hold(conn->hcon);
+ __sco_chan_add(conn, sk, parent);
+
+ if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags))
+ sk->sk_state = BT_CONNECT2;
+ else
+ sk->sk_state = BT_CONNECTED;
+
+ /* Wake up parent */
+ parent->sk_data_ready(parent);
+
+ release_sock(parent);
+
+ sco_conn_unlock(conn);
+ }
+}
+
+/* ----- SCO interface with lower layer (HCI) ----- */
+int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
+{
+ struct sock *sk;
+ int lm = 0;
+
+ BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr);
+
+ /* Find listening sockets */
+ read_lock(&sco_sk_list.lock);
+ sk_for_each(sk, &sco_sk_list.head) {
+ if (sk->sk_state != BT_LISTEN)
+ continue;
+
+ if (!bacmp(&sco_pi(sk)->src, &hdev->bdaddr) ||
+ !bacmp(&sco_pi(sk)->src, BDADDR_ANY)) {
+ lm |= HCI_LM_ACCEPT;
+
+ if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))
+ *flags |= HCI_PROTO_DEFER;
+ break;
+ }
+ }
+ read_unlock(&sco_sk_list.lock);
+
+ return lm;
+}
+
+static void sco_connect_cfm(struct hci_conn *hcon, __u8 status)
+{
+ if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
+ return;
+
+ BT_DBG("hcon %p bdaddr %pMR status %u", hcon, &hcon->dst, status);
+
+ if (!status) {
+ struct sco_conn *conn;
+
+ conn = sco_conn_add(hcon);
+ if (conn)
+ sco_conn_ready(conn);
+ } else
+ sco_conn_del(hcon, bt_to_errno(status));
+}
+
+static void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason)
+{
+ if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK)
+ return;
+
+ BT_DBG("hcon %p reason %d", hcon, reason);
+
+ sco_conn_del(hcon, bt_to_errno(reason));
+}
+
+void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
+{
+ struct sco_conn *conn = hcon->sco_data;
+
+ if (!conn)
+ goto drop;
+
+ BT_DBG("conn %p len %u", conn, skb->len);
+
+ if (skb->len) {
+ sco_recv_frame(conn, skb);
+ return;
+ }
+
+drop:
+ kfree_skb(skb);
+}
+
+static struct hci_cb sco_cb = {
+ .name = "SCO",
+ .connect_cfm = sco_connect_cfm,
+ .disconn_cfm = sco_disconn_cfm,
+};
+
+static int sco_debugfs_show(struct seq_file *f, void *p)
+{
+ struct sock *sk;
+
+ read_lock(&sco_sk_list.lock);
+
+ sk_for_each(sk, &sco_sk_list.head) {
+ seq_printf(f, "%pMR %pMR %d\n", &sco_pi(sk)->src,
+ &sco_pi(sk)->dst, sk->sk_state);
+ }
+
+ read_unlock(&sco_sk_list.lock);
+
+ return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(sco_debugfs);
+
+static struct dentry *sco_debugfs;
+
+static const struct proto_ops sco_sock_ops = {
+ .family = PF_BLUETOOTH,
+ .owner = THIS_MODULE,
+ .release = sco_sock_release,
+ .bind = sco_sock_bind,
+ .connect = sco_sock_connect,
+ .listen = sco_sock_listen,
+ .accept = sco_sock_accept,
+ .getname = sco_sock_getname,
+ .sendmsg = sco_sock_sendmsg,
+ .recvmsg = sco_sock_recvmsg,
+ .poll = bt_sock_poll,
+ .ioctl = bt_sock_ioctl,
+ .gettstamp = sock_gettstamp,
+ .mmap = sock_no_mmap,
+ .socketpair = sock_no_socketpair,
+ .shutdown = sco_sock_shutdown,
+ .setsockopt = sco_sock_setsockopt,
+ .getsockopt = sco_sock_getsockopt
+};
+
+static const struct net_proto_family sco_sock_family_ops = {
+ .family = PF_BLUETOOTH,
+ .owner = THIS_MODULE,
+ .create = sco_sock_create,
+};
+
+int __init sco_init(void)
+{
+ int err;
+
+ BUILD_BUG_ON(sizeof(struct sockaddr_sco) > sizeof(struct sockaddr));
+
+ err = proto_register(&sco_proto, 0);
+ if (err < 0)
+ return err;
+
+ err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops);
+ if (err < 0) {
+ BT_ERR("SCO socket registration failed");
+ goto error;
+ }
+
+ err = bt_procfs_init(&init_net, "sco", &sco_sk_list, NULL);
+ if (err < 0) {
+ BT_ERR("Failed to create SCO proc file");
+ bt_sock_unregister(BTPROTO_SCO);
+ goto error;
+ }
+
+ BT_INFO("SCO socket layer initialized");
+
+ hci_register_cb(&sco_cb);
+
+ if (IS_ERR_OR_NULL(bt_debugfs))
+ return 0;
+
+ sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs,
+ NULL, &sco_debugfs_fops);
+
+ return 0;
+
+error:
+ proto_unregister(&sco_proto);
+ return err;
+}
+
+void sco_exit(void)
+{
+ bt_procfs_cleanup(&init_net, "sco");
+
+ debugfs_remove(sco_debugfs);
+
+ hci_unregister_cb(&sco_cb);
+
+ bt_sock_unregister(BTPROTO_SCO);
+
+ proto_unregister(&sco_proto);
+}
+
+module_param(disable_esco, bool, 0644);
+MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation");