From b3a27bfba51d445784eb0cd6451b73a73fb69cf9 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Tue, 22 Aug 2006 00:32:05 -0700 Subject: [NETFILTER]: ctnetlink: check for listeners before sending expectation events This patch uses nfnetlink_has_listeners to check for listeners in userspace. Signed-off-by: Pablo Neira Ayuso Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/netfilter/nf_conntrack_netlink.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'net/netfilter') diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index aa0148f418a9..dc4f081dca91 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -1278,6 +1278,9 @@ static int ctnetlink_expect_event(struct notifier_block *this, } else return NOTIFY_DONE; + if (!nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW)) + return NOTIFY_DONE; + skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); if (!skb) return NOTIFY_DONE; -- cgit v1.2.3