tree 2e704da1e24eba0f1a09d4b983a34bcc5b51f29d
parent e0bcfb0c6a6ed9ebd68746b306298dc5797fd426
author Wei Yongjun <yjwei@cn.fujitsu.com> 1217069950 +0100
committer Gerrit Renker <gerrit@erg.abdn.ac.uk> 1217069950 +0100

dccp: Fix incorrect length check for ICMPv4 packets

Unlike TCP, which only needs 8 octets of original packet data, DCCP requires
minimally 12 or 16 bytes for ICMP-payload sequence number checks.

This patch replaces the insufficient length constant of 8 with a two-stage
test, making sure that 12 bytes are available, before computing the basic
header length required for sequence number checks.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>