From a2d7222f0f5861ce13b9308c30bd18f28ebeb583 Mon Sep 17 00:00:00 2001 From: Vlad Drukker Date: Sat, 12 Nov 2005 12:13:14 -0800 Subject: [PATCH] [NETFILTER] {ip,nf}_conntrack TCP: Accept SYN+PUSH like SYN Some devices (e.g. Qlogic iSCSI HBA hardware like QLA4010 up to firmware 3.0.0.4) initiates TCP with SYN and PUSH flags set. The Linux TCP/IP stack deals fine with that, but the connection tracking code doesn't. This patch alters TCP connection tracking to accept SYN+PUSH as a valid flag combination. Signed-off-by: Vlad Drukker Signed-off-by: Harald Welte Signed-off-by: David S. Miller --- net/ipv4/netfilter/ip_conntrack_proto_tcp.c | 1 + net/netfilter/nf_conntrack_proto_tcp.c | 1 + 2 files changed, 2 insertions(+) diff --git a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c index 468c6003b4..5b3f5220f2 100644 --- a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c +++ b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c @@ -814,6 +814,7 @@ static u8 tcp_valid_flags[(TH_FIN|TH_SYN|TH_RST|TH_PUSH|TH_ACK|TH_URG) + 1] = { [TH_SYN] = 1, [TH_SYN|TH_ACK] = 1, + [TH_SYN|TH_PUSH] = 1, [TH_SYN|TH_ACK|TH_PUSH] = 1, [TH_RST] = 1, [TH_RST|TH_ACK] = 1, diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c index 83d90dd624..156680ddb0 100644 --- a/net/netfilter/nf_conntrack_proto_tcp.c +++ b/net/netfilter/nf_conntrack_proto_tcp.c @@ -779,6 +779,7 @@ static u8 tcp_valid_flags[(TH_FIN|TH_SYN|TH_RST|TH_PUSH|TH_ACK|TH_URG) + 1] = { [TH_SYN] = 1, [TH_SYN|TH_ACK] = 1, + [TH_SYN|TH_PUSH] = 1, [TH_SYN|TH_ACK|TH_PUSH] = 1, [TH_RST] = 1, [TH_RST|TH_ACK] = 1, -- 2.39.5