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authorPablo Neira Ayuso <pablo@netfilter.org>2006-08-22 00:32:05 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-09-22 14:55:26 -0700
commitb3a27bfba51d445784eb0cd6451b73a73fb69cf9 (patch)
tree0c697133c749cf83167c6e314a4c40ca14d520db
parentb9a37e0c81c498be2db9f52063c53e55d76c815e (diff)
[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 <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/netfilter/ip_conntrack_netlink.c3
-rw-r--r--net/netfilter/nf_conntrack_netlink.c3
2 files changed, 6 insertions, 0 deletions
diff --git a/net/ipv4/netfilter/ip_conntrack_netlink.c b/net/ipv4/netfilter/ip_conntrack_netlink.c
index 38708e6cfae..ef84f43f073 100644
--- a/net/ipv4/netfilter/ip_conntrack_netlink.c
+++ b/net/ipv4/netfilter/ip_conntrack_netlink.c
@@ -1257,6 +1257,9 @@ 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;
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index aa0148f418a..dc4f081dca9 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;