From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 27 Sep 2014 23:40:04 +0000 (+0100)
Subject: transform: Discard previously-received packets
X-Git-Tag: base.ipv6-polypath-fixes.v1~30
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=commitdiff_plain;h=83692003d26df90e149a3e627dbf4aaaad2ddb72;hp=83692003d26df90e149a3e627dbf4aaaad2ddb72;p=secnet.git

transform: Discard previously-received packets

Keep a bitmap of previously-received packets (by sequence number
offset) and discard duplicates.

This feature can only be enabled if the bitmap (32 bits) is big enough
for the sequence number window (`max-skew'), but this is true by
default, and the feature is enabled by default when available.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
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