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#!/bin/bash
# verify we have an internet connection before testing, by TLS querying
# one of the default upstream servers in our /etc/stubby/stubby.yml
UPSTREAM=$(grep -m1 -E '^[^#].*address_data: *([0-9]+\.){3}[0-9]+' /etc/stubby/stubby.yml | cut -d ':' -f 2)
if [[ -z $UPSTREAM ]]; then
echo "no upstream nameserver found in /etc/stubby/stubby.yml"
exit 77
fi
NET_TEST=$(kdig +short +tls @${UPSTREAM## } getdnsapi.net)
if [[ $NET_TEST != 185.49.141.38 ]]; then
# Couldn't reach upstream nameserver, skip the test
exit 77
fi
set -e
getpid() {
PID=$(ps x|grep stubby.yml|grep -v grep|awk '{print $1}')
}
test_stubby() {
port=$1
# a simple smoke test just make sure that at least one query can go through:
time for i in {0..9}; do
if diff -u <(kdig +short @localhost:$port getdnsapi.net) <(echo 185.49.141.38); then
printf .
else
printf !
error=$((error+1))
fi
counter=$((counter+1))
done
}
error=0
counter=0
getpid
stubby -C $(dirname $0)/stubby.yml &
[ -n "$PID" ] && kill $PID
# ==== test round 0 ====
echo Test stubby started by systemd service
test_stubby 53
getpid
echo $error "time(s) error out of $counter times run."
echo
# ==== test round 1 ====
echo Test stubby started by ourselves
echo PID of stubby: $PID
test_stubby 5533
[ -n "$PID" ] && kill $PID
sleep 1
echo $error "time(s) error out of $counter times run."
# ==== test result ====
[ $error -le $((counter/2)) ] && error=0
exit $error
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