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Bluetooth: Add support for deferring RFCOMM connection setup

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In order to decide if listening RFCOMM sockets should be accept()ed
the BD_ADDR of the remote device needs to be known. This patch adds
a socket option which defines a timeout for deferring the actual
connection setup.

The connection setup is done after reading from the socket for the
first time. Until then writing to the socket returns ENOTCONN.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Marcel Holtmann 2009-01-15 21:56:48 +01:00
parent c4f912e155
commit bb23c0ab82
3 changed files with 88 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

44
net/bluetooth/rfcomm/sock.c
View file

@ -262,8 +262,10 @@ static void rfcomm_sock_init(struct sock *sk, struct sock *parent)
if (parent) {
sk->sk_type = parent->sk_type;
pi->link_mode = rfcomm_pi(parent)->link_mode;
pi->dlc->defer_setup = bt_sk(parent)->defer_setup;
} else {
pi->link_mode = 0;
pi->dlc->defer_setup = 0;
}
pi->dlc->link_mode = pi->link_mode;
@ -554,6 +556,9 @@ static int rfcomm_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
struct sk_buff *skb;
int sent = 0;
if (test_bit(RFCOMM_DEFER_SETUP, &d->flags))
return -ENOTCONN;
if (msg->msg_flags & MSG_OOB)
return -EOPNOTSUPP;
@ -633,10 +638,16 @@ static int rfcomm_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size, int flags)
{
struct sock *sk = sock->sk;
struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
int err = 0;
size_t target, copied = 0;
long timeo;
if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) {
rfcomm_dlc_accept(d);
return 0;
}
if (flags & MSG_OOB)
return -EOPNOTSUPP;
@ -746,6 +757,7 @@ static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, c
{
struct sock *sk = sock->sk;
int err = 0;
u32 opt;
BT_DBG("sk %p", sk);
@ -755,6 +767,20 @@ static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, c
lock_sock(sk);
switch (optname) {
case BT_DEFER_SETUP:
if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
err = -EINVAL;
break;
}
if (get_user(opt, (u32 __user *) optval)) {
err = -EFAULT;
break;
}
bt_sk(sk)->defer_setup = opt;
break;
default:
err = -ENOPROTOOPT;
break;
@ -785,7 +811,8 @@ static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __u
break;
case RFCOMM_CONNINFO:
if (sk->sk_state != BT_CONNECTED) {
if (sk->sk_state != BT_CONNECTED &&
!rfcomm_pi(sk)->dlc->defer_setup) {
err = -ENOTCONN;
break;
}
@ -826,6 +853,17 @@ static int rfcomm_sock_getsockopt(struct socket *sock, int level, int optname, c
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(bt_sk(sk)->defer_setup, (u32 __user *) optval))
err = -EFAULT;
break;
default:
err = -ENOPROTOOPT;
break;
@ -938,6 +976,10 @@ int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, struct rfcomm_dlc *
done:
bh_unlock_sock(parent);
if (bt_sk(parent)->defer_setup)
parent->sk_state_change(parent);
return result;
}