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Revert "tcp: disallow bind() to reuse addr/port"

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This reverts commit c191a836a9.

It causes known regressions for programs that expect to be able to use
SO_REUSEADDR to shutdown a socket, then successfully rebind another
socket to the same ID.

Programs such as haproxy and amavisd expect this to work.

This should fix kernel bugzilla 32832.

Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
David S. Miller 2011-04-13 12:01:14 -07:00
commit 3e8c806a08
2 changed files with 3 additions and 4 deletions
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2
net/ipv6/inet6_connection_sock.c
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@ -44,7 +44,7 @@ int inet6_csk_bind_conflict(const struct sock *sk,
!sk2->sk_bound_dev_if ||
sk->sk_bound_dev_if == sk2->sk_bound_dev_if) &&
(!sk->sk_reuse || !sk2->sk_reuse ||
((1 << sk2->sk_state) & (TCPF_LISTEN | TCPF_CLOSE))) &&
sk2->sk_state == TCP_LISTEN) &&
ipv6_rcv_saddr_equal(sk, sk2))
break;
}