patch-2.4.21 linux-2.4.21/net/bluetooth/rfcomm/sock.c

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diff -urN linux-2.4.20/net/bluetooth/rfcomm/sock.c linux-2.4.21/net/bluetooth/rfcomm/sock.c
@@ -0,0 +1,840 @@
+/* 
+   RFCOMM implementation for Linux Bluetooth stack (BlueZ).
+   Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
+   Copyright (C) 2002 Marcel Holtmann <marcel@holtmann.org>
+
+   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.
+*/
+
+/*
+ * RFCOMM sockets.
+ *
+ * $Id: sock.c,v 1.30 2002/10/18 20:12:12 maxk Exp $
+ */
+
+#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/skbuff.h>
+#include <linux/interrupt.h>
+#include <linux/socket.h>
+#include <linux/skbuff.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/rfcomm.h>
+
+#ifndef CONFIG_BLUEZ_RFCOMM_DEBUG
+#undef  BT_DBG
+#define BT_DBG(D...)
+#endif
+
+static struct proto_ops rfcomm_sock_ops;
+
+static struct bluez_sock_list rfcomm_sk_list = {
+	lock: RW_LOCK_UNLOCKED
+};
+
+static void rfcomm_sock_close(struct sock *sk);
+static void rfcomm_sock_kill(struct sock *sk);
+
+/* ---- DLC callbacks ----
+ *
+ * called under rfcomm_dlc_lock()
+ */
+static void rfcomm_sk_data_ready(struct rfcomm_dlc *d, struct sk_buff *skb)
+{
+	struct sock *sk = d->owner;
+	if (!sk)
+		return;
+
+	atomic_add(skb->len, &sk->rmem_alloc);
+	skb_queue_tail(&sk->receive_queue, skb);
+	sk->data_ready(sk, skb->len);
+
+	if (atomic_read(&sk->rmem_alloc) >= sk->rcvbuf)
+		rfcomm_dlc_throttle(d);
+}
+
+static void rfcomm_sk_state_change(struct rfcomm_dlc *d, int err)
+{
+	struct sock *sk = d->owner, *parent;
+	if (!sk)
+		return;
+
+	BT_DBG("dlc %p state %ld err %d", d, d->state, err);
+
+	bh_lock_sock(sk);
+
+	if (err)
+		sk->err = err;
+	sk->state = d->state;
+
+	parent = bluez_pi(sk)->parent;
+	if (!parent) {
+		if (d->state == BT_CONNECTED)
+			rfcomm_session_getaddr(d->session, &bluez_pi(sk)->src, NULL);
+		sk->state_change(sk);
+	} else
+		parent->data_ready(parent, 0);
+
+	bh_unlock_sock(sk);
+}
+
+/* ---- Socket functions ---- */
+static struct sock *__rfcomm_get_sock_by_addr(u8 channel, bdaddr_t *src)
+{
+	struct sock *sk;
+
+	for (sk = rfcomm_sk_list.head; sk; sk = sk->next) {
+		if (rfcomm_pi(sk)->channel == channel && 
+				!bacmp(&bluez_pi(sk)->src, src))
+			break;
+	}
+
+	return sk;
+}
+
+/* Find socket with channel and source bdaddr.
+ * Returns closest match.
+ */
+static struct sock *__rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src)
+{
+	struct sock *sk, *sk1 = NULL;
+
+	for (sk = rfcomm_sk_list.head; sk; sk = sk->next) {
+		if (state && sk->state != state)
+			continue;
+
+		if (rfcomm_pi(sk)->channel == channel) {
+			/* Exact match. */
+			if (!bacmp(&bluez_pi(sk)->src, src))
+				break;
+
+			/* Closest match */
+			if (!bacmp(&bluez_pi(sk)->src, BDADDR_ANY))
+				sk1 = sk;
+		}
+	}
+	return sk ? sk : sk1;
+}
+
+/* Find socket with given address (channel, src).
+ * Returns locked socket */
+static inline struct sock *rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src)
+{
+	struct sock *s;
+	read_lock(&rfcomm_sk_list.lock);
+	s = __rfcomm_get_sock_by_channel(state, channel, src);
+	if (s) bh_lock_sock(s);
+	read_unlock(&rfcomm_sk_list.lock);
+	return s;
+}
+
+static void rfcomm_sock_destruct(struct sock *sk)
+{
+	struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
+
+	BT_DBG("sk %p dlc %p", sk, d);
+
+	skb_queue_purge(&sk->receive_queue);
+	skb_queue_purge(&sk->write_queue);
+
+	rfcomm_dlc_lock(d);
+	rfcomm_pi(sk)->dlc = NULL;
+	
+	/* Detach DLC if it's owned by this socket */
+	if (d->owner == sk)
+		d->owner = NULL;
+	rfcomm_dlc_unlock(d);
+
+	rfcomm_dlc_put(d);
+
+	MOD_DEC_USE_COUNT;
+}
+
+static void rfcomm_sock_cleanup_listen(struct sock *parent)
+{
+	struct sock *sk;
+
+	BT_DBG("parent %p", parent);
+
+	/* Close not yet accepted dlcs */
+	while ((sk = bluez_accept_dequeue(parent, NULL)))
+		rfcomm_sock_close(sk);
+
+	parent->state  = BT_CLOSED;
+	parent->zapped = 1;
+}
+
+/* Kill socket (only if zapped and orphan)
+ * Must be called on unlocked socket.
+ */
+static void rfcomm_sock_kill(struct sock *sk)
+{
+	if (!sk->zapped || sk->socket)
+		return;
+
+	BT_DBG("sk %p state %d refcnt %d", sk, sk->state, atomic_read(&sk->refcnt));
+
+	/* Kill poor orphan */
+	bluez_sock_unlink(&rfcomm_sk_list, sk);
+	sk->dead = 1;
+	sock_put(sk);
+}
+
+/* Close socket.
+ * Must be called on unlocked socket.
+ */
+static void rfcomm_sock_close(struct sock *sk)
+{
+	struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
+
+	lock_sock(sk);
+
+	BT_DBG("sk %p state %d socket %p", sk, sk->state, sk->socket);
+
+	switch (sk->state) {
+	case BT_LISTEN:
+		rfcomm_sock_cleanup_listen(sk);
+		break;
+
+	case BT_CONNECT:
+	case BT_CONNECT2:
+	case BT_CONFIG:
+	case BT_CONNECTED:
+		rfcomm_dlc_close(d, 0);
+
+	default:
+		sk->zapped = 1;
+		break;
+	};
+
+	release_sock(sk);
+
+	rfcomm_sock_kill(sk);
+}
+
+static void rfcomm_sock_init(struct sock *sk, struct sock *parent)
+{
+	BT_DBG("sk %p", sk);
+
+	if (parent) 
+		sk->type = parent->type;
+}
+
+static struct sock *rfcomm_sock_alloc(struct socket *sock, int proto, int prio)
+{
+	struct rfcomm_dlc *d;
+	struct sock *sk;
+
+	sk = sk_alloc(PF_BLUETOOTH, prio, 1);
+	if (!sk)
+		return NULL;
+
+	d = rfcomm_dlc_alloc(prio);
+	if (!d) {
+		sk_free(sk);
+		return NULL;
+	}
+	d->data_ready   = rfcomm_sk_data_ready;
+	d->state_change = rfcomm_sk_state_change;
+
+	rfcomm_pi(sk)->dlc = d;
+	d->owner = sk;
+
+	bluez_sock_init(sock, sk);
+
+	sk->zapped   = 0;
+
+	sk->destruct = rfcomm_sock_destruct;
+	sk->sndtimeo = RFCOMM_CONN_TIMEOUT;
+
+	sk->sndbuf   = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10;
+	sk->rcvbuf   = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10;
+
+	sk->protocol = proto;
+	sk->state    = BT_OPEN;
+
+	bluez_sock_link(&rfcomm_sk_list, sk);
+
+	BT_DBG("sk %p", sk);
+
+	MOD_INC_USE_COUNT;
+	return sk;
+}
+
+static int rfcomm_sock_create(struct socket *sock, int protocol)
+{
+	struct sock *sk;
+
+	BT_DBG("sock %p", sock);
+
+	sock->state = SS_UNCONNECTED;
+
+	if (sock->type != SOCK_STREAM && sock->type != SOCK_RAW)
+		return -ESOCKTNOSUPPORT;
+
+	sock->ops = &rfcomm_sock_ops;
+
+	if (!(sk = rfcomm_sock_alloc(sock, protocol, GFP_KERNEL)))
+		return -ENOMEM;
+
+	rfcomm_sock_init(sk, NULL);
+	return 0;
+}
+
+static int rfcomm_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
+{
+	struct sockaddr_rc *sa = (struct sockaddr_rc *) addr;
+	struct sock *sk = sock->sk;
+	int err = 0;
+
+	BT_DBG("sk %p %s", sk, batostr(&sa->rc_bdaddr));
+
+	if (!addr || addr->sa_family != AF_BLUETOOTH)
+		return -EINVAL;
+
+	lock_sock(sk);
+
+	if (sk->state != BT_OPEN) {
+		err = -EBADFD;
+		goto done;
+	}
+
+	write_lock_bh(&rfcomm_sk_list.lock);
+
+	if (sa->rc_channel && __rfcomm_get_sock_by_addr(sa->rc_channel, &sa->rc_bdaddr)) {
+		err = -EADDRINUSE;
+	} else {
+		/* Save source address */
+		bacpy(&bluez_pi(sk)->src, &sa->rc_bdaddr);
+		rfcomm_pi(sk)->channel = sa->rc_channel;
+		sk->state = BT_BOUND;
+	}
+
+	write_unlock_bh(&rfcomm_sk_list.lock);
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+static int rfcomm_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
+{
+	struct sockaddr_rc *sa = (struct sockaddr_rc *) addr;
+	struct sock *sk = sock->sk;
+	struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
+	int err = 0;
+
+	BT_DBG("sk %p", sk);
+
+	if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_rc))
+		return -EINVAL;
+
+	if (sk->state != BT_OPEN && sk->state != BT_BOUND)
+		return -EBADFD;
+
+	if (sk->type != SOCK_STREAM)
+		return -EINVAL;
+
+	lock_sock(sk);
+
+	sk->state = BT_CONNECT;
+	bacpy(&bluez_pi(sk)->dst, &sa->rc_bdaddr);
+	rfcomm_pi(sk)->channel = sa->rc_channel;
+	
+	err = rfcomm_dlc_open(d, &bluez_pi(sk)->src, &sa->rc_bdaddr, sa->rc_channel);
+	if (!err)
+		err = bluez_sock_w4_connect(sk, flags);
+
+	release_sock(sk);
+	return err;
+}
+
+int rfcomm_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->state != BT_BOUND) {
+		err = -EBADFD;
+		goto done;
+	}
+
+	sk->max_ack_backlog = backlog;
+	sk->ack_backlog = 0;
+	sk->state = BT_LISTEN;
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+int rfcomm_sock_accept(struct socket *sock, struct socket *newsock, int flags)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	struct sock *sk = sock->sk, *nsk;
+	long timeo;
+	int err = 0;
+
+	lock_sock(sk);
+
+	if (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->sleep, &wait);
+	while (!(nsk = bluez_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->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->sleep, &wait);
+
+	if (err)
+		goto done;
+
+	newsock->state = SS_CONNECTED;
+
+	BT_DBG("new socket %p", nsk);
+
+done:
+	release_sock(sk);
+	return err;
+}
+
+static int rfcomm_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer)
+{
+	struct sockaddr_rc *sa = (struct sockaddr_rc *) addr;
+	struct sock *sk = sock->sk;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	sa->rc_family  = AF_BLUETOOTH;
+	sa->rc_channel = rfcomm_pi(sk)->channel;
+	if (peer)
+		bacpy(&sa->rc_bdaddr, &bluez_pi(sk)->dst);
+	else
+		bacpy(&sa->rc_bdaddr, &bluez_pi(sk)->src);
+
+	*len = sizeof(struct sockaddr_rc);
+	return 0;
+}
+
+static int rfcomm_sock_sendmsg(struct socket *sock, struct msghdr *msg, int len,
+			       struct scm_cookie *scm)
+{
+	struct sock *sk = sock->sk;
+	struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
+	struct sk_buff *skb;
+	int err, size;
+	int sent = 0;
+
+	if (msg->msg_flags & MSG_OOB)
+		return -EOPNOTSUPP;
+
+	if (sk->shutdown & SEND_SHUTDOWN)
+		return -EPIPE;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	lock_sock(sk);
+
+	while (len) {
+		size = min_t(uint, len, d->mtu);
+		
+		skb = sock_alloc_send_skb(sk, size + RFCOMM_SKB_RESERVE,
+				msg->msg_flags & MSG_DONTWAIT, &err);
+		if (!skb)
+			break;
+		skb_reserve(skb, RFCOMM_SKB_HEAD_RESERVE);
+
+		err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size);
+		if (err) {
+			kfree_skb(skb);
+			sent = err;
+			break;
+		}
+
+		err = rfcomm_dlc_send(d, skb);
+		if (err < 0) {
+			kfree_skb(skb);
+			break;
+		}
+
+		sent += size;
+		len  -= size;
+	}
+
+	release_sock(sk);
+
+	return sent ? sent : err;
+}
+
+static long rfcomm_sock_data_wait(struct sock *sk, long timeo)
+{
+	DECLARE_WAITQUEUE(wait, current);
+
+	add_wait_queue(sk->sleep, &wait);
+	for (;;) {
+		set_current_state(TASK_INTERRUPTIBLE);
+
+		if (skb_queue_len(&sk->receive_queue) || sk->err || (sk->shutdown & RCV_SHUTDOWN) ||
+				signal_pending(current) || !timeo)
+			break;
+
+		set_bit(SOCK_ASYNC_WAITDATA, &sk->socket->flags);
+		release_sock(sk);
+		timeo = schedule_timeout(timeo);
+		lock_sock(sk);
+		clear_bit(SOCK_ASYNC_WAITDATA, &sk->socket->flags);
+	}
+
+	__set_current_state(TASK_RUNNING);
+	remove_wait_queue(sk->sleep, &wait);
+	return timeo;
+}
+
+static int rfcomm_sock_recvmsg(struct socket *sock, struct msghdr *msg, int size,
+			       int flags, struct scm_cookie *scm)
+{
+	struct sock *sk = sock->sk;
+	int target, err = 0, copied = 0;
+	long timeo;
+
+	if (sk->state != BT_CONNECTED)
+		return -EINVAL;
+
+	if (flags & MSG_OOB)
+		return -EOPNOTSUPP;
+
+	msg->msg_namelen = 0;
+
+	BT_DBG("sk %p size %d", sk, size);
+
+	lock_sock(sk);
+
+	target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
+	timeo  = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
+
+	do {
+		struct sk_buff *skb;
+		int chunk;
+
+		skb = skb_dequeue(&sk->receive_queue);
+		if (!skb) {
+			if (copied >= target)
+				break;
+
+			if ((err = sock_error(sk)) != 0)
+				break;
+			if (sk->shutdown & RCV_SHUTDOWN)
+				break;
+
+			err = -EAGAIN;
+			if (!timeo)
+				break;
+
+			timeo = rfcomm_sock_data_wait(sk, timeo);
+
+			if (signal_pending(current)) {
+				err = sock_intr_errno(timeo);
+				goto out;
+			}
+			continue;
+		}
+
+		chunk = min_t(unsigned int, skb->len, size);
+		if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
+			skb_queue_head(&sk->receive_queue, skb);
+			if (!copied)
+				copied = -EFAULT;
+			break;
+		}
+		copied += chunk;
+		size   -= chunk;
+
+		if (!(flags & MSG_PEEK)) {
+			atomic_sub(chunk, &sk->rmem_alloc);
+
+			skb_pull(skb, chunk);
+			if (skb->len) {
+				skb_queue_head(&sk->receive_queue, skb);
+				break;
+			}
+			kfree_skb(skb);
+
+		} else {
+			/* put message back and return */
+			skb_queue_head(&sk->receive_queue, skb);
+			break;
+		}
+	} while (size);
+
+out:
+	if (atomic_read(&sk->rmem_alloc) <= (sk->rcvbuf >> 2))
+		rfcomm_dlc_unthrottle(rfcomm_pi(sk)->dlc);
+
+	release_sock(sk);
+	return copied ? : err;
+}
+
+static int rfcomm_sock_shutdown(struct socket *sock, int how)
+{
+	struct sock *sk = sock->sk;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	if (!sk) return 0;
+
+	lock_sock(sk);
+	sk->shutdown = SHUTDOWN_MASK;
+	if (sk->state == BT_CONNECTED)
+		rfcomm_dlc_close(rfcomm_pi(sk)->dlc, 0);
+	release_sock(sk);
+
+	return 0;
+}
+
+static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, char *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 rfcomm_sock_getsockopt(struct socket *sock, int level, int optname, char *optval, int *optlen)
+{
+	struct sock *sk = sock->sk;
+	int len, err = 0; 
+
+	BT_DBG("sk %p", sk);
+
+	if (get_user(len, optlen))
+		return -EFAULT;
+
+	lock_sock(sk);
+
+	switch (optname) {
+	default:
+		err = -ENOPROTOOPT;
+		break;
+	};
+
+	release_sock(sk);
+	return err;
+}
+
+static int rfcomm_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+	struct sock *sk = sock->sk;
+	int err;
+
+	lock_sock(sk);
+
+#ifdef CONFIG_BLUEZ_RFCOMM_TTY
+	err = rfcomm_dev_ioctl(sk, cmd, arg);
+#else
+	err = -EOPNOTSUPP;
+#endif
+
+	release_sock(sk);
+
+	return err;
+}
+
+static int rfcomm_sock_release(struct socket *sock)
+{
+	struct sock *sk = sock->sk;
+
+	BT_DBG("sock %p, sk %p", sock, sk);
+
+	if (!sk)
+		return 0;
+
+	sock_orphan(sk);
+	rfcomm_sock_close(sk);
+
+	return 0;
+}
+
+/* ---- RFCOMM core layer callbacks ---- 
+ *
+ * called under rfcomm_lock()
+ */
+int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, struct rfcomm_dlc **d)
+{
+	struct sock *sk, *parent;
+	bdaddr_t src, dst;
+	int result = 0;
+
+	BT_DBG("session %p channel %d", s, channel);
+
+	rfcomm_session_getaddr(s, &src, &dst);
+
+	/* Check if we have socket listening on this channel */
+	parent = rfcomm_get_sock_by_channel(BT_LISTEN, channel, &src);
+	if (!parent)
+		return 0;
+
+	/* Check for backlog size */
+	if (parent->ack_backlog > parent->max_ack_backlog) {
+		BT_DBG("backlog full %d", parent->ack_backlog); 
+		goto done;
+	}
+
+	sk = rfcomm_sock_alloc(NULL, BTPROTO_RFCOMM, GFP_ATOMIC);
+	if (!sk)
+		goto done;
+
+	rfcomm_sock_init(sk, parent);
+	bacpy(&bluez_pi(sk)->src, &src);
+	bacpy(&bluez_pi(sk)->dst, &dst);
+	rfcomm_pi(sk)->channel = channel;
+
+	sk->state = BT_CONFIG;
+	bluez_accept_enqueue(parent, sk);
+
+	/* Accept connection and return socket DLC */
+	*d = rfcomm_pi(sk)->dlc;
+	result = 1;
+
+done:
+	bh_unlock_sock(parent);
+	return result;
+}
+
+/* ---- Proc fs support ---- */
+int rfcomm_sock_dump(char *buf)
+{
+	struct bluez_sock_list *list = &rfcomm_sk_list;
+	struct rfcomm_pinfo *pi;
+	struct sock *sk;
+	char *ptr = buf;
+
+	write_lock_bh(&list->lock);
+
+	for (sk = list->head; sk; sk = sk->next) {
+		pi = rfcomm_pi(sk);
+		ptr += sprintf(ptr, "sk  %s %s %d %d\n",
+				batostr(&bluez_pi(sk)->src), batostr(&bluez_pi(sk)->dst),
+				sk->state, rfcomm_pi(sk)->channel);
+	}
+
+	write_unlock_bh(&list->lock);
+
+	return ptr - buf;
+}
+
+static struct proto_ops rfcomm_sock_ops = {
+	family:		PF_BLUETOOTH,
+	release:	rfcomm_sock_release,
+	bind:		rfcomm_sock_bind,
+	connect:	rfcomm_sock_connect,
+	listen:		rfcomm_sock_listen,
+	accept:		rfcomm_sock_accept,
+	getname:	rfcomm_sock_getname,
+	sendmsg:	rfcomm_sock_sendmsg,
+	recvmsg:	rfcomm_sock_recvmsg,
+	shutdown:	rfcomm_sock_shutdown,
+	setsockopt:	rfcomm_sock_setsockopt,
+	getsockopt:	rfcomm_sock_getsockopt,
+	ioctl:		rfcomm_sock_ioctl,
+	poll:		bluez_sock_poll,
+	socketpair:	sock_no_socketpair,
+	mmap:		sock_no_mmap
+};
+
+static struct net_proto_family rfcomm_sock_family_ops = {
+	family:		PF_BLUETOOTH,
+	create:		rfcomm_sock_create
+};
+
+int rfcomm_init_sockets(void)
+{
+	int err;
+
+	if ((err = bluez_sock_register(BTPROTO_RFCOMM, &rfcomm_sock_family_ops))) {
+		BT_ERR("Can't register RFCOMM socket layer");
+		return err;
+	}
+
+	return 0;
+}
+
+void rfcomm_cleanup_sockets(void)
+{
+	int err;
+
+	/* Unregister socket, protocol and notifier */
+	if ((err = bluez_sock_unregister(BTPROTO_RFCOMM)))
+		BT_ERR("Can't unregister RFCOMM socket layer %d", err);
+}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)