dccp: Fix incorrect length check for ICMPv4 packets
authorWei Yongjun <yjwei@cn.fujitsu.com>
Sat, 26 Jul 2008 10:59:10 +0000 (11:59 +0100)
committerGerrit Renker <gerrit@erg.abdn.ac.uk>
Sat, 26 Jul 2008 10:59:10 +0000 (11:59 +0100)
commit18e1d836002ad970f42736bad09b7be9cfe99545
tree2e704da1e24eba0f1a09d4b983a34bcc5b51f29d
parente0bcfb0c6a6ed9ebd68746b306298dc5797fd426
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>
net/dccp/ipv4.c