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send expectation events if someone is listening to

PATCH In review Pablo Neira Ayuso 1 participant 1 message Jul 7, 2006

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Pablo Neira Ayuso

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PATCH 9/10 send expectation events if someone is listening to

This patch uses nfnetlink_has_listeners to check for listeners in userspace.

Signed-off-by Pablo Neira Ayuso <[email protected]>
Signature · 2 lines
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

[CTNETLINK] send expectation events if someone is listening to

This patch uses nfnetlink_has_listeners to check for listeners in userspace.

Signed-off-by Pablo Neira Ayuso <[email protected]>
net/ipv4/netfilter/ip_conntrack_netlink.c +3 -0
Index: net-2.6/net/ipv4/netfilter/ip_conntrack_netlink.c
===================================================================
@@ -1286,6 +1286,9 @@ 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;
net/netfilter/nf_conntrack_netlink.c +3 -0
Index: net-2.6/net/netfilter/nf_conntrack_netlink.c
===================================================================
@@ -1312,6 +1312,9 @@ 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;