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authorDong Wei <dwei.zh@gmail.com>2008-06-04 09:57:51 -0700
committerDavid S. Miller <davem@davemloft.net>2008-06-04 09:57:51 -0700
commitd2ee3f2c4b1db1320c1efb4dcaceeaf6c7e6c2d3 (patch)
tree081c903c68a0df98f0ac1f3a73f480d801af0689
parentab32cd793dca21eec846a8204390d9594ed994d5 (diff)
netfilter: xt_connlimit: fix accouning when receive RST packet in ESTABLISHED state
In xt_connlimit match module, the counter of an IP is decreased when the TCP packet is go through the chain with ip_conntrack state TW. Well, it's very natural that the server and client close the socket with FIN packet. But when the client/server close the socket with RST packet(using so_linger), the counter for this connection still exsit. The following patch can fix it which is based on linux-2.6.25.4 Signed-off-by: Dong Wei <dwei.zh@gmail.com> Acked-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/netfilter/xt_connlimit.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/netfilter/xt_connlimit.c b/net/netfilter/xt_connlimit.c
index 2e89a00df92c..70907f6baac3 100644
--- a/net/netfilter/xt_connlimit.c
+++ b/net/netfilter/xt_connlimit.c
@@ -73,7 +73,8 @@ connlimit_iphash6(const union nf_inet_addr *addr,
static inline bool already_closed(const struct nf_conn *conn)
{
if (nf_ct_protonum(conn) == IPPROTO_TCP)
- return conn->proto.tcp.state == TCP_CONNTRACK_TIME_WAIT;
+ return conn->proto.tcp.state == TCP_CONNTRACK_TIME_WAIT ||
+ conn->proto.tcp.state == TCP_CONNTRACK_CLOSE;
else
return 0;
}

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