From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pablo Neira Ayuso <pablo@netfilter.org>
Subject: [PATCH 3/8][CTNETLINK] send expectation events iif there listeners
Date: Tue, 25 Jul 2006 15:18:02 +0200
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Cc: Harald Welte <laforge@netfilter.org>, Patrick McHardy <kaber@trash.net>
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This patch uses nfnetlink_has_listeners to check for listeners in userspace.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

-- 
The dawn of the fourth age of Linux firewalling is coming; a time of 
great struggle and heroic deeds -- J.Kadlecsik got inspired by J.Morris

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[CTNETLINK] send expectation events iif there are listeners

This patch uses nfnetlink_has_listeners to check for listeners in userspace.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Index: net-2.6/net/ipv4/netfilter/ip_conntrack_netlink.c
===================================================================
--- net-2.6.orig/net/ipv4/netfilter/ip_conntrack_netlink.c	2006-07-14 16:38:57.000000000 +0200
+++ net-2.6/net/ipv4/netfilter/ip_conntrack_netlink.c	2006-07-20 21:25:36.000000000 +0200
@@ -1260,6 +1260,9 @@ static int ctnetlink_expect_event(struct
 	} 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;
Index: net-2.6/net/netfilter/nf_conntrack_netlink.c
===================================================================
--- net-2.6.orig/net/netfilter/nf_conntrack_netlink.c	2006-07-14 16:38:57.000000000 +0200
+++ net-2.6/net/netfilter/nf_conntrack_netlink.c	2006-07-20 21:25:36.000000000 +0200
@@ -1281,6 +1281,9 @@ static int ctnetlink_expect_event(struct
 	} 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;

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