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[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 <vlad@storewiz.com> Signed-off-by: Harald Welte <laforge@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -814,6 +814,7 @@ static u8 tcp_valid_flags[(TH_FIN|TH_SYN|TH_RST|TH_PUSH|TH_ACK|TH_URG) + 1] =
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{
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[TH_SYN] = 1,
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[TH_SYN|TH_ACK] = 1,
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[TH_SYN|TH_PUSH] = 1,
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[TH_SYN|TH_ACK|TH_PUSH] = 1,
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[TH_RST] = 1,
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[TH_RST|TH_ACK] = 1,
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@ -779,6 +779,7 @@ static u8 tcp_valid_flags[(TH_FIN|TH_SYN|TH_RST|TH_PUSH|TH_ACK|TH_URG) + 1] =
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{
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[TH_SYN] = 1,
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[TH_SYN|TH_ACK] = 1,
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[TH_SYN|TH_PUSH] = 1,
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[TH_SYN|TH_ACK|TH_PUSH] = 1,
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[TH_RST] = 1,
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[TH_RST|TH_ACK] = 1,
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