From: Dong Wei Date: Wed, 4 Jun 2008 16:57:51 +0000 (-0700) Subject: netfilter: xt_connlimit: fix accouning when receive RST packet in ESTABLISHED state X-Git-Tag: v2.6.26-rc5~1^2~19 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=d2ee3f2c4b1db1320c1efb4dcaceeaf6c7e6c2d3;p=linux-2.6-omap-h63xx.git 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 Acked-by: Jan Engelhardt Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- diff --git a/net/netfilter/xt_connlimit.c b/net/netfilter/xt_connlimit.c index 2e89a00df92..70907f6baac 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; }