Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1071 insertions, 0 deletions

diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
new file mode 100644
index 000000000000..3e750ef09e60
--- /dev/null
+++ b/net/bluetooth/sco.c
@@ -0,0 +1,1071 @@
+/* 
+   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/config.h>
+#include <linux/module.h>
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <linux/fcntl.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/socket.h>
+#include <linux/skbuff.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/list.h>
+#include <net/sock.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/sco.h>
+
+#ifndef CONFIG_BT_SCO_DEBUG
+#undef  BT_DBG
+#define BT_DBG(D...)
+#endif
+
+#define VERSION "0.4"
+
+static struct proto_ops sco_sock_ops;
+
+static struct bt_sock_list sco_sk_list = {
+        .lock = RW_LOCK_UNLOCKED
+};
+
+static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent);
+static void sco_chan_del(struct sock *sk, int err);
+
+static int  sco_conn_del(struct hci_conn *conn, int err);
+
+static void sco_sock_close(struct sock *sk);
+static void sco_sock_kill(struct sock *sk);
+
+/* ---- SCO timers ---- */
+static void sco_sock_timeout(unsigned long arg)
+{
+        struct sock *sk = (struct sock *) arg;
+
+        BT_DBG("sock %p state %d", sk, sk->sk_state);
+
+        bh_lock_sock(sk);
+        sk->sk_err = ETIMEDOUT;
+        sk->sk_state_change(sk);
+        bh_unlock_sock(sk);
+
+        sco_sock_kill(sk);
+        sock_put(sk);
+}
+
+static void sco_sock_set_timer(struct sock *sk, long timeout)
+{
+        BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
+        sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout);
+}
+
+static void sco_sock_clear_timer(struct sock *sk)
+{
+        BT_DBG("sock %p state %d", sk, sk->sk_state);
+        sk_stop_timer(sk, &sk->sk_timer);
+}
+
+static void sco_sock_init_timer(struct sock *sk)
+{
+        init_timer(&sk->sk_timer);
+        sk->sk_timer.function = sco_sock_timeout;
+        sk->sk_timer.data = (unsigned long)sk;
+}
+
+/* ---- SCO connections ---- */
+static struct sco_conn *sco_conn_add(struct hci_conn *hcon, __u8 status)
+{
+        struct hci_dev *hdev = hcon->hdev;
+        struct sco_conn *conn;
+
+        if ((conn = hcon->sco_data))
+                return conn;
+
+        if (status)
+                return conn;
+
+        if (!(conn = kmalloc(sizeof(struct sco_conn), GFP_ATOMIC)))
+                return NULL;
+        memset(conn, 0, sizeof(struct sco_conn));
+
+        spin_lock_init(&conn->lock);
+
+        hcon->sco_data = conn;
+        conn->hcon = hcon;
+
+        conn->src = &hdev->bdaddr;
+        conn->dst = &hcon->dst;
+
+        if (hdev->sco_mtu > 0)
+                conn->mtu = hdev->sco_mtu;
+        else
+                conn->mtu = 60;
+
+        BT_DBG("hcon %p conn %p", hcon, conn);
+        return conn;
+}
+
+static inline struct sock *sco_chan_get(struct sco_conn *conn)
+{
+        struct sock *sk = NULL;
+        sco_conn_lock(conn);
+        sk = conn->sk;
+        sco_conn_unlock(conn);
+        return sk;
+}
+
+static int sco_conn_del(struct hci_conn *hcon, int err)
+{
+        struct sco_conn *conn;
+        struct sock *sk;
+
+        if (!(conn = hcon->sco_data)) 
+                return 0;
+
+        BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
+
+        /* Kill socket */
+        if ((sk = sco_chan_get(conn))) {
+                bh_lock_sock(sk);
+                sco_sock_clear_timer(sk);
+                sco_chan_del(sk, err);
+                bh_unlock_sock(sk);
+                sco_sock_kill(sk);
+        }
+
+        hcon->sco_data = NULL;
+        kfree(conn);
+        return 0;
+}
+
+static inline 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)
+{
+        bdaddr_t *src = &bt_sk(sk)->src;
+        bdaddr_t *dst = &bt_sk(sk)->dst;
+        struct sco_conn *conn;
+        struct hci_conn *hcon;
+        struct hci_dev  *hdev;
+        int err = 0;
+
+        BT_DBG("%s -> %s", batostr(src), batostr(dst));
+
+        if (!(hdev = hci_get_route(dst, src)))
+                return -EHOSTUNREACH;
+
+        hci_dev_lock_bh(hdev);
+
+        err = -ENOMEM;
+
+        hcon = hci_connect(hdev, SCO_LINK, dst);
+        if (!hcon)
+                goto done;
+
+        conn = sco_conn_add(hcon, 0);
+        if (!conn) {
+                hci_conn_put(hcon);
+                goto done;
+        }
+
+        /* Update source addr of the socket */
+        bacpy(src, conn->src);
+
+        err = sco_chan_add(conn, sk, NULL);
+        if (err)
+                goto done;
+
+        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);
+        }
+done:
+        hci_dev_unlock_bh(hdev);
+        hci_dev_put(hdev);
+        return err;
+}
+
+static inline int sco_send_frame(struct sock *sk, struct msghdr *msg, int len)
+{
+        struct sco_conn *conn = sco_pi(sk)->conn;
+        struct sk_buff *skb;
+        int err, count;
+
+        /* Check outgoing MTU */
+        if (len > conn->mtu)
+                return -EINVAL;
+
+        BT_DBG("sk %p len %d", sk, len);
+
+        count = min_t(unsigned int, conn->mtu, len);
+        if (!(skb = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err)))
+                return err;
+
+        if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) {
+                err = -EFAULT;
+                goto fail;
+        }
+
+        if ((err = hci_send_sco(conn->hcon, skb)) < 0)
+                goto fail;
+
+        return count;
+
+fail:
+        kfree_skb(skb);
+        return err;
+}
+
+static inline void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb)
+{
+        struct sock *sk = sco_chan_get(conn);
+
+        if (!sk)
+                goto drop;
+
+        BT_DBG("sk %p len %d", sk, skb->len);
+
+        if (sk->sk_state != BT_CONNECTED)
+                goto drop;
+
+        if (!sock_queue_rcv_skb(sk, skb))
+                return;
+
+drop:
+        kfree_skb(skb);
+        return;
+}
+
+/* -------- Socket interface ---------- */
+static struct sock *__sco_get_sock_by_addr(bdaddr_t *ba)
+{
+        struct sock *sk;
+        struct hlist_node *node;
+
+        sk_for_each(sk, node, &sco_sk_list.head)
+                if (!bacmp(&bt_sk(sk)->src, ba))
+                        goto found;
+        sk = NULL;
+found:
+        return sk;
+}
+
+/* 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;
+        struct hlist_node *node;
+
+        read_lock(&sco_sk_list.lock);
+
+        sk_for_each(sk, node, &sco_sk_list.head) {
+                if (sk->sk_state != BT_LISTEN)
+                        continue;
+
+                /* Exact match. */
+                if (!bacmp(&bt_sk(sk)->src, src))
+                        break;
+
+                /* Closest match */
+                if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY))
+                        sk1 = sk;
+        }
+
+        read_unlock(&sco_sk_list.lock);
+
+        return node ? 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);
+}
+
+/* Close socket.
+ * Must be called on unlocked socket.
+ */
+static void sco_sock_close(struct sock *sk)
+{
+        struct sco_conn *conn;
+
+        sco_sock_clear_timer(sk);
+
+        lock_sock(sk);
+
+        conn = sco_pi(sk)->conn;
+
+        BT_DBG("sk %p state %d conn %p socket %p", sk, sk->sk_state, conn, sk->sk_socket);
+
+        switch (sk->sk_state) {
+        case BT_LISTEN:
+                sco_sock_cleanup_listen(sk);
+                break;
+
+        case BT_CONNECTED:
+        case BT_CONFIG:
+        case BT_CONNECT:
+        case BT_DISCONN:
+                sco_chan_del(sk, ECONNRESET);
+                break;
+
+        default:
+                sock_set_flag(sk, SOCK_ZAPPED);
+                break;
+        };
+
+        release_sock(sk);
+
+        sco_sock_kill(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;
+}
+
+static struct proto sco_proto = {
+        .name           = "SCO",
+        .owner          = THIS_MODULE,
+        .obj_size       = sizeof(struct sco_pinfo)
+};
+
+static struct sock *sco_sock_alloc(struct socket *sock, int proto, int prio)
+{
+        struct sock *sk;
+
+        sk = sk_alloc(PF_BLUETOOTH, prio, &sco_proto, 1);
+        if (!sk)
+                return NULL;
+
+        sock_init_data(sock, sk);
+        INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
+
+        sk->sk_destruct = sco_sock_destruct;
+        sk->sk_sndtimeo = SCO_CONN_TIMEOUT;
+
+        sock_reset_flag(sk, SOCK_ZAPPED);
+
+        sk->sk_protocol = proto;
+        sk->sk_state    = BT_OPEN;
+
+        sco_sock_init_timer(sk);
+
+        bt_sock_link(&sco_sk_list, sk);
+        return sk;
+}
+
+static int sco_sock_create(struct socket *sock, int protocol)
+{
+        struct sock *sk;
+
+        BT_DBG("sock %p", sock);
+
+        sock->state = SS_UNCONNECTED;
+
+        if (sock->type != SOCK_SEQPACKET)
+                return -ESOCKTNOSUPPORT;
+
+        sock->ops = &sco_sock_ops;
+
+        if (!(sk = sco_sock_alloc(sock, protocol, GFP_KERNEL)))
+                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;
+        bdaddr_t *src = &sa->sco_bdaddr;
+        int err = 0;
+
+        BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr));
+
+        if (!addr || addr->sa_family != AF_BLUETOOTH)
+                return -EINVAL;
+
+        lock_sock(sk);
+
+        if (sk->sk_state != BT_OPEN) {
+                err = -EBADFD;
+                goto done;
+        }
+
+        write_lock_bh(&sco_sk_list.lock);
+
+        if (bacmp(src, BDADDR_ANY) && __sco_get_sock_by_addr(src)) {
+                err = -EADDRINUSE;
+        } else {
+                /* Save source address */
+                bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr);
+                sk->sk_state = BT_BOUND;
+        }
+
+        write_unlock_bh(&sco_sk_list.lock);
+
+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 = 0;
+
+
+        BT_DBG("sk %p", sk);
+
+        if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_sco))
+                return -EINVAL;
+
+        if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
+                return -EBADFD;
+
+        if (sk->sk_type != SOCK_SEQPACKET)
+                return -EINVAL;
+
+        lock_sock(sk);
+
+        /* Set destination address and psm */
+        bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr);
+
+        if ((err = sco_connect(sk)))
+                goto done;
+
+        err = bt_sock_wait_state(sk, BT_CONNECTED, 
+                        sock_sndtimeo(sk, flags & O_NONBLOCK));
+
+done:
+        release_sock(sk);
+        return err;
+}
+
+static int sco_sock_listen(struct socket *sock, int backlog)
+{
+        struct sock *sk = sock->sk;
+        int err = 0;
+
+        BT_DBG("sk %p backlog %d", sk, backlog);
+
+        lock_sock(sk);
+
+        if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) {
+                err = -EBADFD;
+                goto done;
+        }
+
+        sk->sk_max_ack_backlog = backlog;
+        sk->sk_ack_backlog = 0;
+        sk->sk_state = BT_LISTEN;
+
+done:
+        release_sock(sk);
+        return err;
+}
+
+static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags)
+{
+        DECLARE_WAITQUEUE(wait, current);
+        struct sock *sk = sock->sk, *ch;
+        long timeo;
+        int err = 0;
+
+        lock_sock(sk);
+
+        if (sk->sk_state != BT_LISTEN) {
+                err = -EBADFD;
+                goto done;
+        }
+
+        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->sk_sleep, &wait);
+        while (!(ch = bt_accept_dequeue(sk, newsock))) {
+                set_current_state(TASK_INTERRUPTIBLE);
+                if (!timeo) {
+                        err = -EAGAIN;
+                        break;
+                }
+
+                release_sock(sk);
+                timeo = schedule_timeout(timeo);
+                lock_sock(sk);
+
+                if (sk->sk_state != BT_LISTEN) {
+                        err = -EBADFD;
+                        break;
+                }
+
+                if (signal_pending(current)) {
+                        err = sock_intr_errno(timeo);
+                        break;
+                }
+        }
+        set_current_state(TASK_RUNNING);
+        remove_wait_queue(sk->sk_sleep, &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 *len, 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;
+        *len = sizeof(struct sockaddr_sco);
+
+        if (peer)
+                bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst);
+        else
+                bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src);
+
+        return 0;
+}
+
+static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock, 
+                            struct msghdr *msg, size_t len)
+{
+        struct sock *sk = sock->sk;
+        int err = 0;
+
+        BT_DBG("sock %p, sk %p", sock, sk);
+
+        if (sk->sk_err)
+                return sock_error(sk);
+
+        if (msg->msg_flags & MSG_OOB)
+                return -EOPNOTSUPP;
+
+        lock_sock(sk);
+
+        if (sk->sk_state == BT_CONNECTED)
+                err = sco_send_frame(sk, msg, len);
+        else
+                err = -ENOTCONN;
+
+        release_sock(sk);
+        return err;
+}
+
+static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
+{
+        struct sock *sk = sock->sk;
+        int err = 0;
+
+        BT_DBG("sk %p", sk);
+
+        lock_sock(sk);
+
+        switch (optname) {
+        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;
+        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) {
+                        err = -ENOTCONN;
+                        break;
+                }
+
+                opts.mtu = sco_pi(sk)->conn->mtu;
+
+                BT_DBG("mtu %d", 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) {
+                        err = -ENOTCONN;
+                        break;
+                }
+
+                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_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) && sk->sk_lingertime) {
+                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_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);
+}
+
+/* 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);
+                hci_conn_put(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_ready(struct sco_conn *conn)
+{
+        struct sock *parent, *sk;
+
+        BT_DBG("conn %p", conn);
+
+        sco_conn_lock(conn);
+
+        if ((sk = conn->sk)) {
+                sco_sock_clear_timer(sk);
+                bh_lock_sock(sk);
+                sk->sk_state = BT_CONNECTED;
+                sk->sk_state_change(sk);
+                bh_unlock_sock(sk);
+        } else {
+                parent = sco_get_sock_listen(conn->src);
+                if (!parent)
+                        goto done;
+
+                bh_lock_sock(parent);
+
+                sk = sco_sock_alloc(NULL, BTPROTO_SCO, GFP_ATOMIC);
+                if (!sk) {
+                        bh_unlock_sock(parent);
+                        goto done;
+                }
+
+                sco_sock_init(sk, parent);
+
+                bacpy(&bt_sk(sk)->src, conn->src);
+                bacpy(&bt_sk(sk)->dst, conn->dst);
+
+                hci_conn_hold(conn->hcon);
+                __sco_chan_add(conn, sk, parent);
+
+                sk->sk_state = BT_CONNECTED;
+
+                /* Wake up parent */
+                parent->sk_data_ready(parent, 1);
+
+                bh_unlock_sock(parent);
+        }
+
+done:
+        sco_conn_unlock(conn);
+}
+
+/* ----- SCO interface with lower layer (HCI) ----- */
+static int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type)
+{
+        BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr));
+
+        /* Always accept connection */
+        return HCI_LM_ACCEPT;
+}
+
+static int sco_connect_cfm(struct hci_conn *hcon, __u8 status)
+{
+        BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status);
+
+        if (hcon->type != SCO_LINK)
+                return 0;
+
+        if (!status) {
+                struct sco_conn *conn;
+
+                conn = sco_conn_add(hcon, status);
+                if (conn)
+                        sco_conn_ready(conn);
+        } else 
+                sco_conn_del(hcon, bt_err(status));
+
+        return 0;
+}
+
+static int sco_disconn_ind(struct hci_conn *hcon, __u8 reason)
+{
+        BT_DBG("hcon %p reason %d", hcon, reason);
+
+        if (hcon->type != SCO_LINK)
+                return 0;
+
+        sco_conn_del(hcon, bt_err(reason));
+        return 0;
+}
+
+static int 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 %d", conn, skb->len);
+
+        if (skb->len) {
+                sco_recv_frame(conn, skb);
+                return 0;
+        }
+
+drop:
+        kfree_skb(skb); 
+        return 0;
+}
+
+/* ---- Proc fs support ---- */
+#ifdef CONFIG_PROC_FS
+static void *sco_seq_start(struct seq_file *seq, loff_t *pos)
+{
+        struct sock *sk;
+        struct hlist_node *node;
+        loff_t l = *pos;
+
+        read_lock_bh(&sco_sk_list.lock);
+
+        sk_for_each(sk, node, &sco_sk_list.head)
+                if (!l--)
+                        goto found;
+        sk = NULL;
+found:
+        return sk;
+}
+
+static void *sco_seq_next(struct seq_file *seq, void *e, loff_t *pos)
+{
+        struct sock *sk = e;
+        (*pos)++;
+        return sk_next(sk);
+}
+
+static void sco_seq_stop(struct seq_file *seq, void *e)
+{
+        read_unlock_bh(&sco_sk_list.lock);
+}
+
+static int  sco_seq_show(struct seq_file *seq, void *e)
+{
+        struct sock *sk = e;
+        seq_printf(seq, "%s %s %d\n",
+                        batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), sk->sk_state);
+        return 0;
+}
+
+static struct seq_operations sco_seq_ops = {
+        .start  = sco_seq_start,
+        .next   = sco_seq_next,
+        .stop   = sco_seq_stop,
+        .show   = sco_seq_show 
+};
+
+static int sco_seq_open(struct inode *inode, struct file *file)
+{
+        return seq_open(file, &sco_seq_ops);
+}
+
+static struct file_operations sco_seq_fops = {
+        .owner          = THIS_MODULE,
+        .open           = sco_seq_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = seq_release,
+};
+
+static int __init sco_proc_init(void)
+{
+        struct proc_dir_entry *p = create_proc_entry("sco", S_IRUGO, proc_bt);
+        if (!p)
+                return -ENOMEM;
+        p->owner     = THIS_MODULE;
+        p->proc_fops = &sco_seq_fops;
+        return 0;
+}
+
+static void __exit sco_proc_cleanup(void)
+{
+        remove_proc_entry("sco", proc_bt);
+}
+
+#else /* CONFIG_PROC_FS */
+
+static int __init sco_proc_init(void)
+{
+        return 0;
+}
+
+static void __exit sco_proc_cleanup(void)
+{
+        return;
+}
+#endif /* CONFIG_PROC_FS */
+
+static 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        = bt_sock_recvmsg,
+        .poll           = bt_sock_poll,
+        .ioctl          = sock_no_ioctl,
+        .mmap           = sock_no_mmap,
+        .socketpair     = sock_no_socketpair,
+        .shutdown       = sock_no_shutdown,
+        .setsockopt     = sco_sock_setsockopt,
+        .getsockopt     = sco_sock_getsockopt
+};
+
+static struct net_proto_family sco_sock_family_ops = {
+        .family = PF_BLUETOOTH,
+        .owner  = THIS_MODULE,
+        .create = sco_sock_create,
+};
+
+static struct hci_proto sco_hci_proto = {
+        .name           = "SCO",
+        .id             = HCI_PROTO_SCO,
+        .connect_ind    = sco_connect_ind,
+        .connect_cfm    = sco_connect_cfm,
+        .disconn_ind    = sco_disconn_ind,
+        .recv_scodata   = sco_recv_scodata
+};
+
+static int __init sco_init(void)
+{
+        int err;
+
+        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 = hci_register_proto(&sco_hci_proto);
+        if (err < 0) {
+                BT_ERR("SCO protocol registration failed");
+                bt_sock_unregister(BTPROTO_SCO);
+                goto error;
+        }
+
+        sco_proc_init();
+
+        BT_INFO("SCO (Voice Link) ver %s", VERSION);
+        BT_INFO("SCO socket layer initialized");
+
+        return 0;
+
+error:
+        proto_unregister(&sco_proto);
+        return err;
+}
+
+static void __exit sco_exit(void)
+{
+        sco_proc_cleanup();
+
+        if (bt_sock_unregister(BTPROTO_SCO) < 0)
+                BT_ERR("SCO socket unregistration failed");
+
+        if (hci_unregister_proto(&sco_hci_proto) < 0)
+                BT_ERR("SCO protocol unregistration failed");
+
+        proto_unregister(&sco_proto);
+}
+
+module_init(sco_init);
+module_exit(sco_exit);
+
+MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>");
+MODULE_DESCRIPTION("Bluetooth SCO ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("bt-proto-2");