bind9/bin/tests/system/statschannel/tests.sh

#!/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.

set -e

# shellcheck source=conf.sh
. ../conf.sh

DIGCMD="$DIG @10.53.0.2 -p ${PORT}"
RNDCCMD="$RNDC -c ../common/rndc.conf -p ${CONTROLPORT} -s"

if ! $FEATURETEST --have-json-c
then
    unset PERL_JSON
    echo_i "JSON was not configured; skipping" >&2
elif $PERL -e 'use JSON;' 2>/dev/null
then
    PERL_JSON=1
else
    unset PERL_JSON
    echo_i "JSON tests require JSON library; skipping" >&2
fi

if ! $FEATURETEST --have-libxml2
then
    unset PERL_XML
    echo_i "XML was not configured; skipping" >&2
elif $PERL -e 'use XML::Simple;' 2>/dev/null
then
    PERL_XML=1
else
    unset PERL_XML
    echo_i "XML tests require XML::Simple; skipping" >&2
fi

if [ ! "$PERL_JSON" ] && [ ! "$PERL_XML" ]; then
    echo_i "skipping all tests"
    exit 0
fi


getzones() {
    sleep 1
    echo_i "... using $1"
    case $1 in
        xml) path='xml/v3/zones' ;;
        json) path='json/v1/zones' ;;
        *) return 1 ;;
    esac
    file=$($PERL fetch.pl -p ${EXTRAPORT1} $path)
    cp $file $file.$1.$3
    { $PERL zones-${1}.pl $file $2 2>/dev/null | sort > zones.out.$3; result=$?; } || true
    return $result
}

# TODO: Move loadkeys_on to conf.sh.common
loadkeys_on() {
    nsidx=$1
    zone=$2
    nextpart ns${nsidx}/named.run > /dev/null
    $RNDCCMD 10.53.0.${nsidx} loadkeys ${zone} | sed "s/^/ns${nsidx} /" | cat_i
    wait_for_log 20 "next key event" ns${nsidx}/named.run
}

# verify that the http server dropped the connection without replying
check_http_dropped() {
    if [ -x "${NC}" ] ; then
	"${NC}" 10.53.0.3 "${EXTRAPORT1}" > nc.out$n || ret=1
	if test -s nc.out$n; then
		ret=1
	fi
    else
	echo_i "skipping test as nc not found"
    fi
}

status=0
n=1

echo_i "check content-length parse error ($n)"
ret=0
check_http_dropped <<EOF
POST /xml/v3/status HTTP/1.0
Content-Length: nah

EOF
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

echo_i "check negative content-length ($n)"
ret=0
check_http_dropped <<EOF
POST /xml/v3/status HTTP/1.0
Content-Length: -50

EOF
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

echo_i "check content-length 32-bit overflow ($n)"
check_http_dropped <<EOF
POST /xml/v3/status HTTP/1.0
Content-Length: 4294967239

EOF
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

echo_i "check content-length 64-bit overflow ($n)"
check_http_dropped <<EOF
POST /xml/v3/status HTTP/1.0
Content-Length: 18446744073709551549

EOF

if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

echo_i "Prepare for if-modified-since test ($n)"
ret=0
i=0
if $FEATURETEST --have-libxml2 && [ -x "${CURL}" ] ; then
    URL="http://10.53.0.3:${EXTRAPORT1}/bind9.xsl"
    ${CURL} --silent --show-error --fail --output bind9.xsl.1 $URL
    ret=$?
else
    echo_i "skipping test: requires libxml2 and curl"
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

echo_i "checking consistency between named.stats and xml/json ($n)"
ret=0
rm -f ns2/named.stats
$DIGCMD +tcp example ns > dig.out.$n || ret=1
$RNDCCMD 10.53.0.2 stats 2>&1 | sed 's/^/I:ns1 /'
query_count=$(awk '/QUERY/ {print $1}' ns2/named.stats)
txt_count=$(awk '/TXT/ {print $1}' ns2/named.stats)
noerror_count=$(awk '/NOERROR/ {print $1}' ns2/named.stats)
if [ $PERL_XML ]; then
    file=$($PERL fetch.pl -p ${EXTRAPORT1} xml/v3/server)
    mv $file xml.stats
    $PERL server-xml.pl > xml.fmtstats 2> /dev/null
    xml_query_count=$(awk '/opcode QUERY/ { print $NF }' xml.fmtstats)
    xml_query_count=${xml_query_count:-0}
    [ "$query_count" -eq "$xml_query_count" ] || ret=1
    xml_txt_count=$(awk '/qtype TXT/ { print $NF }' xml.fmtstats)
    xml_txt_count=${xml_txt_count:-0}
    [ "$txt_count" -eq "$xml_txt_count" ] || ret=1
    xml_noerror_count=$(awk '/rcode NOERROR/ { print $NF }' xml.fmtstats)
    xml_noerror_count=${xml_noerror_count:-0}
    [ "$noerror_count" -eq "$xml_noerror_count" ] || ret=1
fi
if [ $PERL_JSON ]; then
    file=$($PERL fetch.pl -p ${EXTRAPORT1} json/v1/server)
    mv $file json.stats
    $PERL server-json.pl > json.fmtstats 2> /dev/null
    json_query_count=$(awk '/opcode QUERY/ { print $NF }' json.fmtstats)
    json_query_count=${json_query_count:-0}
    [ "$query_count" -eq "$json_query_count" ] || ret=1
    json_txt_count=$(awk '/qtype TXT/ { print $NF }' json.fmtstats)
    json_txt_count=${json_txt_count:-0}
    [ "$txt_count" -eq "$json_txt_count" ] || ret=1
    json_noerror_count=$(awk '/rcode NOERROR/ { print $NF }' json.fmtstats)
    json_noerror_count=${json_noerror_count:-0}
    [ "$noerror_count" -eq "$json_noerror_count" ] || ret=1
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

ret=0
echo_i "checking malloced memory statistics xml/json ($n)"
if [ $PERL_XML ]; then
    file=$($PERL fetch.pl -p ${EXTRAPORT1} xml/v3/mem)
    mv $file xml.mem
    $PERL mem-xml.pl $file > xml.fmtmem
    grep "'InUse' => '[0-9][0-9]*'" xml.fmtmem > /dev/null || ret=1
    grep "'inuse' => '[0-9][0-9]*'" xml.fmtmem > /dev/null || ret=1
fi
if [ $PERL_JSON ]; then
    file=$($PERL fetch.pl -p ${EXTRAPORT1} json/v1/mem)
    mv $file json.mem
    grep '"inuse":[0-9][0-9]*,' json.mem > /dev/null || ret=1
    grep '"InUse":[0-9][0-9]*,' json.mem > /dev/null || ret=1
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

echo_i "checking consistency between regular and compressed output ($n)"
ret=0
if [ -x "${CURL}" ] ; then
    for i in 1 2 3 4 5; do
        ret=0
        if $FEATURETEST --have-libxml2;
        then
            URL="http://10.53.0.2:${EXTRAPORT1}/xml/v3/server"
            filter_str='s#<current-time>.*</current-time>##g'
        else
            URL="http://10.53.0.2:${EXTRAPORT1}/json/v1/server"
            filter_str='s#"current-time.*",##g'
        fi
        "${CURL}" -D regular.headers "$URL" 2>/dev/null | \
            sed -e "$filter_str" > regular.out || ret=1
        "${CURL}" -D compressed.headers --compressed "$URL" 2>/dev/null | \
            sed -e "$filter_str" > compressed.out || ret=1
        diff regular.out compressed.out >/dev/null || ret=1
        if [ $ret != 0 ]; then
            echo_i "failed on try $i, probably a timing issue, trying again"
            sleep 1
        else
            break
        fi
    done
else
    echo_i "skipping test as curl not found"
fi
status=$((status + ret))
n=$((n + 1))

ret=0
echo_i "checking if compressed output is really compressed ($n)"
if $FEATURETEST --with-zlib;
then
    REGSIZE=$(cat regular.headers | \
        grep -i Content-Length | sed -e "s/.*: \([0-9]*\).*/\1/")
    COMPSIZE=$(cat compressed.headers | \
        grep -i Content-Length | sed -e "s/.*: \([0-9]*\).*/\1/")
    if [ ! $((REGSIZE / COMPSIZE)) -gt 2 ]; then
        ret=1
    fi
else
    echo_i "skipped"
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

# Test dnssec sign statistics.
zone="dnssec"
sign_prefix="dnssec-sign operations"
refresh_prefix="dnssec-refresh operations"
ksk_id=$(cat ns2/$zone.ksk.id)
zsk_id=$(cat ns2/$zone.zsk.id)

# Test sign operations for scheduled resigning.
ret=0
# The dnssec zone has 10 RRsets to sign (including NSEC) with the ZSK and one
# RRset (DNSKEY) with the KSK. So starting named with signatures that expire
# almost right away, this should trigger 10 zsk and 1 ksk sign operations.
echo "${refresh_prefix} ${zsk_id}: 10" > zones.expect
echo "${refresh_prefix} ${ksk_id}: 1" >> zones.expect
echo "${sign_prefix} ${zsk_id}: 10" >> zones.expect
echo "${sign_prefix} ${ksk_id}: 1" >> zones.expect
cat zones.expect | sort > zones.expect.$n
rm -f zones.expect
# Fetch and check the dnssec sign statistics.
echo_i "fetching zone '$zone' stats data after zone maintenance at startup ($n)"
if [ $PERL_XML ]; then
    getzones xml $zone x$n || ret=1
    cmp zones.out.x$n zones.expect.$n || ret=1
fi
if [ $PERL_JSON ]; then
    getzones json 0 j$n || ret=1
    cmp zones.out.j$n zones.expect.$n || ret=1
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

# Test sign operations after dynamic update.
ret=0
(
# Update dnssec zone to trigger signature creation.
echo zone $zone
echo server 10.53.0.2 "$PORT"
echo update add $zone. 300 in txt "nsupdate added me"
echo send
) | $NSUPDATE
# This should trigger the resign of SOA, TXT and NSEC (+3 zsk).
echo "${refresh_prefix} ${zsk_id}: 10" > zones.expect
echo "${refresh_prefix} ${ksk_id}: 1" >> zones.expect
echo "${sign_prefix} ${zsk_id}: 13" >> zones.expect
echo "${sign_prefix} ${ksk_id}: 1" >> zones.expect
cat zones.expect | sort > zones.expect.$n
rm -f zones.expect
# Fetch and check the dnssec sign statistics.
echo_i "fetching zone '$zone' stats data after dynamic update ($n)"
if [ $PERL_XML ]; then
    getzones xml $zone x$n || ret=1
    cmp zones.out.x$n zones.expect.$n || ret=1
fi
if [ $PERL_JSON ]; then
    getzones json 0 j$n || ret=1
    cmp zones.out.j$n zones.expect.$n || ret=1
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

# Test sign operations of KSK.
ret=0
echo_i "fetch zone '$zone' stats data after updating DNSKEY RRset ($n)"
id=$(echo "${zsk_id}" | cut -d+ -f2 -)
# Add a DNSKEY, this triggers resigning the DNSKEY RRset.
zsk=$("$KEYGEN" -L 3600 -q -a "$DEFAULT_ALGORITHM" -b "$DEFAULT_BITS" "$zone")
(
echo zone $zone
echo server 10.53.0.2 "$PORT"
echo update add $(cat "${zsk}.key" | grep -v ";.*")
echo send
) | $NSUPDATE
# This should trigger the resign of SOA (+1 zsk) and DNSKEY (+1 ksk).
echo "${refresh_prefix} ${zsk_id}: 10" > zones.expect
echo "${refresh_prefix} ${ksk_id}: 1" >> zones.expect
echo "${sign_prefix} ${zsk_id}: 14" >> zones.expect
echo "${sign_prefix} ${ksk_id}: 2" >> zones.expect
cat zones.expect | sort > zones.expect.$n
rm -f zones.expect
# Fetch and check the dnssec sign statistics.
if [ $PERL_XML ]; then
    getzones xml $zone x$n || ret=1
    cmp zones.out.x$n zones.expect.$n || ret=1
fi
if [ $PERL_JSON ]; then
    getzones json 0 j$n || ret=1
    cmp zones.out.j$n zones.expect.$n || ret=1
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

# Test sign operations for scheduled resigning (many keys).
ret=0
zone="manykeys"
ksk8_id=$(cat ns2/$zone.ksk8.id)
zsk8_id=$(cat ns2/$zone.zsk8.id)
ksk13_id=$(cat ns2/$zone.ksk13.id)
zsk13_id=$(cat ns2/$zone.zsk13.id)
ksk14_id=$(cat ns2/$zone.ksk14.id)
zsk14_id=$(cat ns2/$zone.zsk14.id)
# The dnssec zone has 10 RRsets to sign (including NSEC) with the ZSKs and one
# RRset (DNSKEY) with the KSKs. So starting named with signatures that expire
# almost right away, this should trigger 10 zsk and 1 ksk sign operations per
# key.
echo "${refresh_prefix} ${zsk8_id}: 10" > zones.expect
echo "${refresh_prefix} ${zsk13_id}: 10" >> zones.expect
echo "${refresh_prefix} ${zsk14_id}: 10" >> zones.expect
echo "${refresh_prefix} ${ksk8_id}: 1" >> zones.expect
echo "${refresh_prefix} ${ksk13_id}: 1" >> zones.expect
echo "${refresh_prefix} ${ksk14_id}: 1" >> zones.expect
echo "${sign_prefix} ${zsk8_id}: 10" >> zones.expect
echo "${sign_prefix} ${zsk13_id}: 10" >> zones.expect
echo "${sign_prefix} ${zsk14_id}: 10" >> zones.expect
echo "${sign_prefix} ${ksk8_id}: 1" >> zones.expect
echo "${sign_prefix} ${ksk13_id}: 1" >> zones.expect
echo "${sign_prefix} ${ksk14_id}: 1" >> zones.expect
cat zones.expect | sort > zones.expect.$n
rm -f zones.expect
# Fetch and check the dnssec sign statistics.
echo_i "fetching zone '$zone' stats data after zone maintenance at startup ($n)"
if [ $PERL_XML ]; then
    getzones xml $zone x$n || ret=1
    cmp zones.out.x$n zones.expect.$n || ret=1
fi
if [ $PERL_JSON ]; then
    getzones json 2 j$n || ret=1
    cmp zones.out.j$n zones.expect.$n || ret=1
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

# Test sign operations after dynamic update (many keys).
ret=0
(
# Update dnssec zone to trigger signature creation.
echo zone $zone
echo server 10.53.0.2 "$PORT"
echo update add $zone. 300 in txt "nsupdate added me"
echo send
) | $NSUPDATE
# This should trigger the resign of SOA, TXT and NSEC (+3 zsk).
echo "${refresh_prefix} ${zsk8_id}: 10" > zones.expect
echo "${refresh_prefix} ${zsk13_id}: 10" >> zones.expect
echo "${refresh_prefix} ${zsk14_id}: 10" >> zones.expect
echo "${refresh_prefix} ${ksk8_id}: 1" >> zones.expect
echo "${refresh_prefix} ${ksk13_id}: 1" >> zones.expect
echo "${refresh_prefix} ${ksk14_id}: 1" >> zones.expect
echo "${sign_prefix} ${zsk8_id}: 13" >> zones.expect
echo "${sign_prefix} ${zsk13_id}: 13" >> zones.expect
echo "${sign_prefix} ${zsk14_id}: 13" >> zones.expect
echo "${sign_prefix} ${ksk8_id}: 1" >> zones.expect
echo "${sign_prefix} ${ksk13_id}: 1" >> zones.expect
echo "${sign_prefix} ${ksk14_id}: 1" >> zones.expect
cat zones.expect | sort > zones.expect.$n
rm -f zones.expect
# Fetch and check the dnssec sign statistics.
echo_i "fetching zone '$zone' stats data after dynamic update ($n)"
if [ $PERL_XML ]; then
    getzones xml $zone x$n || ret=1
    cmp zones.out.x$n zones.expect.$n || ret=1
fi
if [ $PERL_JSON ]; then
    getzones json 2 j$n || ret=1
    cmp zones.out.j$n zones.expect.$n || ret=1
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

# Test sign operations after dnssec-policy change (removing keys).
ret=0
copy_setports ns2/named2.conf.in ns2/named.conf
$RNDCCMD 10.53.0.2 reload 2>&1 | sed 's/^/I:ns2 /'
# This should trigger the resign of DNSKEY (+1 ksk), and SOA, NSEC,
# TYPE65534 (+3 zsk). The dnssec-sign statistics for the removed keys should
# be cleared and thus no longer visible. But NSEC and SOA are (mistakenly)
# counted double, one time because of zone_resigninc and one time because of
# zone_nsec3chain. So +5 zsk in total.
echo "${refresh_prefix} ${zsk8_id}: 15" > zones.expect
echo "${refresh_prefix} ${ksk8_id}: 2" >> zones.expect
echo "${sign_prefix} ${zsk8_id}: 18" >> zones.expect
echo "${sign_prefix} ${ksk8_id}: 2" >> zones.expect
cat zones.expect | sort > zones.expect.$n
rm -f zones.expect
# Fetch and check the dnssec sign statistics.
echo_i "fetching zone '$zone' stats data after dnssec-policy change ($n)"
if [ $PERL_XML ]; then
    getzones xml $zone x$n || ret=1
    cmp zones.out.x$n zones.expect.$n || ret=1
fi
if [ $PERL_JSON ]; then
    getzones json 2 j$n || ret=1
    cmp zones.out.j$n zones.expect.$n || ret=1
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

echo_i "Check HTTP/1.1 client-side pipelined requests are handled (GET) ($n)"
ret=0
if [ -x "${NC}" ] ; then
    "${NC}" 10.53.0.3 "${EXTRAPORT1}" << EOF > nc.out$n || ret=1
GET /xml/v3/status HTTP/1.1
Host: 10.53.0.3:${EXTRAPORT1}

GET /xml/v3/status HTTP/1.1
Host: 10.53.0.3:${EXTRAPORT1}
Connection: close

EOF
    lines=$(grep -c "^<statistics version" nc.out$n)
    test "$lines" = 2 || ret=1
    # keep-alive not needed in HTTP/1.1, second response has close
    lines=$(grep -c "^Connection: Keep-Alive" nc.out$n || true)
    test "$lines" = 0 || ret=1
    lines=$(grep -c "^Connection: close" nc.out$n)
    test "$lines" = 1 || ret=1
else
    echo_i "skipping test as nc not found"
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

echo_i "Check HTTP/1.1 client-side pipelined requests are handled (POST) ($n)"
ret=0
if [ -x "${NC}" ]; then
    "${NC}" 10.53.0.3 "${EXTRAPORT1}" << EOF > nc.out$n || ret=1
POST /xml/v3/status HTTP/1.1
Host: 10.53.0.3:${EXTRAPORT1}
Content-Type: application/json
Content-Length: 3

{}
POST /xml/v3/status HTTP/1.1
Host: 10.53.0.3:${EXTRAPORT1}
Content-Type: application/json
Content-Length: 3
Connection: close

{}
EOF
    lines=$(grep -c "^<statistics version" nc.out$n)
    test "$lines" = 2 || ret=1
    # keep-alive not needed in HTTP/1.1, second response has close
    lines=$(grep -c "^Connection: Keep-Alive" nc.out$n || true)
    test "$lines" = 0 || ret=1
    lines=$(grep -c "^Connection: close" nc.out$n)
    test "$lines" = 1 || ret=1
else
    echo_i "skipping test as nc not found"
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

echo_i "Check HTTP/1.0 keep-alive ($n)"
ret=0
if [ -x "${NC}" ]; then
    "${NC}" 10.53.0.3 "${EXTRAPORT1}" << EOF > nc.out$n || ret=1
GET /xml/v3/status HTTP/1.0
Connection: keep-alive

GET /xml/v3/status HTTP/1.0

EOF
    # should be two responses
    lines=$(grep -c "^<statistics version" nc.out$n)
    test "$lines" = 2 || ret=1
    # first response has keep-alive, second has close
    lines=$(grep -c "^Connection: Keep-Alive" nc.out$n || true)
    test "$lines" = 1 || ret=1
    lines=$(grep -c "^Connection: close" nc.out$n)
    test "$lines" = 1 || ret=1
else
    echo_i "skipping test as nc not found"
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

echo_i "Check inconsistent Connection: headers ($n)"
ret=0
if [ -x "${NC}" ]; then
    "${NC}" 10.53.0.3 "${EXTRAPORT1}" << EOF > nc.out$n || ret=1
GET /xml/v3/status HTTP/1.0
Connection: keep-alive
Connection: close

GET /xml/v3/status HTTP/1.0

EOF
    # should be one response (second is ignored)
    lines=$(grep -c "^<statistics version" nc.out$n)
    test "$lines" = 1 || ret=1
    # no keep-alive, one close
    lines=$(grep -c "^Connection: Keep-Alive" nc.out$n || true)
    test "$lines" = 0 || ret=1
    lines=$(grep -c "^Connection: close" nc.out$n)
    test "$lines" = 1 || ret=1
else
    echo_i "skipping test as nc not found"
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

if [ -x "${CURL}" ] && ! ("${CURL}" --next 2>&1 | grep 'option --next: is unknown'); then
    CURL_NEXT="${CURL}"
fi

echo_i "Check HTTP with more than 100 headers ($n)"
ret=0
i=0
if [ -x "${CURL_NEXT}" ] ; then
    # build input stream.
    : > header.in$n
    while test $i -lt 101
    do
        printf 'X-Bloat%d: VGhlIG1vc3QgY29tbW9uIHJlYXNvbiBmb3IgYmxvYXRpbmcgaXMgaGF2aW5nIGEgbG90IG9mIGdhcyBpbiB5b3VyIGd1dC4gCg==\r\n' $i >> header.in$n
        i=$((i+1))
    done
    printf '\r\n' >> header.in$n

    # send the requests then wait for named to close the socket.
    URL="http://10.53.0.3:${EXTRAPORT1}/xml/v3/status"
    "${CURL}" --silent --include --get "$URL" --next --get --header @header.in$n "$URL" > curl.out$n && ret=1
    # we expect 1 request to be processed.
    lines=$(grep -c "^<statistics version" curl.out$n)
    test "$lines" = 1 || ret=1
else
    echo_i "skipping test as curl with --next support not found"
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

echo_i "Check HTTP/1.1 keep-alive with truncated stream ($n)"
ret=0
i=0
if [ -x "${CURL_NEXT}" ] ; then
    # build input stream.
    printf 'X-Bloat: ' > header.in$n
    while test $i -lt 5000
    do
        printf '%s' "VGhlIG1vc3QgY29tbW9uIHJlYXNvbiBmb3IgYmxvYXRpbmcgaXMgaGF2aW5nIGEgbG90IG9mIGdhcyBpbiB5b3VyIGd1dC4gCg==" >> header.in$n
        i=$((i+1))
    done
    printf '\r\n' >> header.in$n

    # send the requests then wait for named to close the socket.
    URL="http://10.53.0.3:${EXTRAPORT1}/xml/v3/status"
    "${CURL}" --silent --include --get "$URL" --next --get --header @header.in$n "$URL" > curl.out$n && ret=1
    # we expect 1 request to be processed.
    lines=$(grep -c "^<statistics version" curl.out$n)
    test "$lines" = 1 || ret=1
else
    echo_i "skipping test as curl with --next support not found"
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

echo_i "Check that consequtive responses do not grow excessively ($n)"
ret=0
i=0
if [ -x "${CURL}" ] ; then
    URL="http://10.53.0.3:${EXTRAPORT1}/json/v1"
    "${CURL}" --silent --include --header "Accept-Encoding: deflate, gzip, br, zstd" "$URL" "$URL" "$URL" "$URL" "$URL" "$URL" "$URL" "$URL" "$URL" "$URL" > curl.out$n || ret=1
    grep -a Content-Length curl.out$n | awk 'BEGIN { prev=0; } { if (prev != 0 && $2 - prev > 100) { exit(1); } prev = $2; }' || ret=1
else
    echo_i "skipping test as curl not found"
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

echo_i "Check if-modified-since works ($n)"
ret=0
if $FEATURETEST --have-libxml2 && [ -x "${CURL}" ] ; then
    URL="http://10.53.0.3:${EXTRAPORT1}/bind9.xsl"
    # ensure over-long time stamps are ignored
    ${CURL} --silent --show-error --fail --output bind9.xsl.2 $URL \
	    --header 'If-Modified-Since: 0123456789 0123456789 0123456789 0123456789 0123456789 0123456789'
    if  ! [ bind9.xsl.2 -nt bind9.xsl.1 ] ||
        ! ${CURL} --silent --show-error --fail \
		  --output bind9.xsl.3 $URL \
		  --time-cond bind9.xsl.1 ||
	[ -f bind9.xsl.3 ]
    then
	   ret=1
    fi
else
    echo_i "skipping test: requires libxml2 and curl"
fi
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))

echo_i "exit status: $status"
[ $status -eq 0 ] || exit 1