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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.

#shellcheck source=conf.sh
SYSTEMTESTTOP=..
. "$SYSTEMTESTTOP/conf.sh"

dig_with_opts() {
	"$DIG" -p "${PORT}" "$@"
}

wait_for_pid() (
	for pid in "$@"; do
		kill -0 "$pid" 2>/dev/null && return 1
	done
	return 0
)

status=0
n=0

n=$((n+1))
echo_i "check lookups against TTL=0 records ($n)"
i=0
ret=0
passes=10
dig_with_opts @10.53.0.2 axfr example | grep -v "^ds0" | \
awk '$2 == "0" { print "-q", $1, $4; print "-q", "zzz"$1, $4;}' > query.list

# add 1/5 second per query
timeout=$(($(wc -l < query.list) / 5))
while [ $i -lt $passes ]
do
	(dig_with_opts @10.53.0.3 -f query.list > "dig.out$i.1.test$n") & pid1="$!"
	(dig_with_opts @10.53.0.3 -f query.list > "dig.out$i.2.test$n") & pid2="$!"
	(dig_with_opts @10.53.0.3 -f query.list > "dig.out$i.3.test$n") & pid3="$!"
	(dig_with_opts @10.53.0.3 -f query.list > "dig.out$i.4.test$n") & pid4="$!"
	(dig_with_opts @10.53.0.3 -f query.list > "dig.out$i.5.test$n") & pid5="$!"
	(dig_with_opts @10.53.0.3 -f query.list > "dig.out$i.6.test$n") & pid6="$!"

	retry_quiet "$timeout" wait_for_pid "$pid1" "$pid2" "$pid3" "$pid4" "$pid5" "$pid6" || ret=1
	kill -TERM "$pid1" "$pid2" "$pid3" "$pid4" "$pid5" "$pid6" 2>/dev/null

	wait "$pid1" || ret=1
	wait "$pid2" || ret=1
	wait "$pid3" || ret=1
	wait "$pid4" || ret=1
	wait "$pid5" || ret=1
	wait "$pid6" || ret=1

	grep "status: SERVFAIL" "dig.out$i.1.test$n" > /dev/null && ret=1
	grep "status: SERVFAIL" "dig.out$i.2.test$n" > /dev/null && ret=1
	grep "status: SERVFAIL" "dig.out$i.3.test$n" > /dev/null && ret=1
	grep "status: SERVFAIL" "dig.out$i.4.test$n" > /dev/null && ret=1
	grep "status: SERVFAIL" "dig.out$i.5.test$n" > /dev/null && ret=1
	grep "status: SERVFAIL" "dig.out$i.6.test$n" > /dev/null && ret=1
	[ $ret = 1 ] && break
	i=$((i+1))
	echo_i "successfully completed pass $i of $passes"
done
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))

repeat_query() (
	i=0
	while [ "$i" -lt "$1" ]; do
		dig_with_opts +short "@$2" "$3" | tee "dig.out$i.test$n" || return 1
		i=$((i+1))
	done
)

count_unique() (
	repeat_query "$@" | sort -u | wc -l
)

n=$((n+1))
echo_i "check repeated recursive lookups of non recurring TTL=0 responses get new values ($n)"
ret=0
repeats=9
count=$(count_unique "$repeats" 10.53.0.3 foo.increment)
if [ "$count" -ne "$repeats" ] ; then echo_i "failed (count=$count, repeats=$repeats)"; ret=1; fi
status=$((status+ret))

n=$((n+1))
echo_i "check lookups against TTL=1 records ($n)"
i=0
passes=10
ret=0
while [ $i -lt $passes ]
do
	dig_with_opts @10.53.0.3 www.one.tld > "dig.out$i.1.test$n" || ret=1
	dig_with_opts @10.53.0.3 www.one.tld > "dig.out$i.2.test$n" || ret=1
	dig_with_opts @10.53.0.3 www.one.tld > "dig.out$i.3.test$n" || ret=1
	dig_with_opts @10.53.0.3 www.one.tld > "dig.out$i.4.test$n" || ret=1
	dig_with_opts @10.53.0.3 www.one.tld > "dig.out$i.5.test$n" || ret=1
	dig_with_opts @10.53.0.3 www.one.tld > "dig.out$i.6.test$n" || ret=1
	grep "status: SERVFAIL" "dig.out$i.1.test$n" > /dev/null && ret=1
	grep "status: SERVFAIL" "dig.out$i.2.test$n" > /dev/null && ret=1
	grep "status: SERVFAIL" "dig.out$i.3.test$n" > /dev/null && ret=1
	grep "status: SERVFAIL" "dig.out$i.4.test$n" > /dev/null && ret=1
	grep "status: SERVFAIL" "dig.out$i.5.test$n" > /dev/null && ret=1
	grep "status: SERVFAIL" "dig.out$i.6.test$n" > /dev/null && ret=1
	[ $ret = 1 ] && break
	i=$((i+1))
	echo_i "successfully completed pass $i of $passes"
	sleep 1
done
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))

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