Commit d3ab4298 authored by Patrick McHardy's avatar Patrick McHardy Committed by David S. Miller

[NETFILTER]: tcp conntrack: accept SYN|URG as valid

Some stacks apparently send packets with SYN|URG set. Linux accepts
these packets, so TCP conntrack should to.

Pointed out by Martijn Posthuma <posthuma@sangine.com>.
Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e281db5c
......@@ -812,8 +812,10 @@ void ip_conntrack_tcp_update(struct sk_buff *skb,
static const 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_URG] = 1,
[TH_SYN|TH_PUSH|TH_URG] = 1,
[TH_SYN|TH_ACK] = 1,
[TH_SYN|TH_ACK|TH_PUSH] = 1,
[TH_RST] = 1,
[TH_RST|TH_ACK] = 1,
......
......@@ -769,8 +769,10 @@ EXPORT_SYMBOL_GPL(nf_conntrack_tcp_update);
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_URG] = 1,
[TH_SYN|TH_PUSH|TH_URG] = 1,
[TH_SYN|TH_ACK] = 1,
[TH_SYN|TH_ACK|TH_PUSH] = 1,
[TH_RST] = 1,
[TH_RST|TH_ACK] = 1,
......
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