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#!/bin/sh
# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
#
# SPDX-License-Identifier: MPL-2.0
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, you can obtain one at https://mozilla.org/MPL/2.0/.
#
# See the COPYRIGHT file distributed with this work for additional
# information regarding copyright ownership.
SYSTEMTESTTOP=..
. $SYSTEMTESTTOP/conf.sh
DIGOPTS="+nosea +stat +noquest +nocomm +nocmd -p ${PORT}"
status=0
echo_i "Getting message size with compression enabled"
$DIG $DIGOPTS -b 10.53.0.1 @10.53.0.1 mx example >dig.compen.test
COMPEN=$(grep ';; MSG SIZE' dig.compen.test | sed -e "s/.*: //g")
cat dig.compen.test | grep -v ';;' | sort >dig.compen.sorted.test
echo_i "Getting message size with compression disabled"
$DIG $DIGOPTS -b 10.53.0.2 @10.53.0.1 mx example >dig.compdis.test
COMPDIS=$(grep ';; MSG SIZE' dig.compdis.test | sed -e "s/.*: //g")
cat dig.compdis.test | grep -v ';;' | sort >dig.compdis.sorted.test
# the compression disabled message should be at least twice as large as with
# compression disabled, but the content should be the same
echo_i "Checking if responses are identical other than in message size"
$DIFF dig.compdis.sorted.test dig.compen.sorted.test >/dev/null
ret=$?
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$(expr $status + $ret)
echo_i "Checking if message with compression disabled is significantly larger"
echo_i "Disabled $COMPDIS vs enabled $COMPEN"
val=$(expr \( $COMPDIS \* 3 / 2 \) / $COMPEN)
if [ $val -le 1 ]; then
echo_i "failed"
status=$(expr $status + 1)
fi
echo_i "exit status: $status"
[ $status -eq 0 ] || exit 1
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