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Random domain selection, support for non-standard DNS ports, and sorting results automatically #45

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Random domain selection, support for non-standard DNS ports, and sorting results automatically #45

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57 changes: 41 additions & 16 deletions dnstest.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -4,9 +4,11 @@ command -v bc > /dev/null || { echo "bc was not found. Please install bc."; exit
{ command -v drill > /dev/null && dig=drill; } || { command -v dig > /dev/null && dig=dig; } || { echo "dig was not found. Please install dnsutils."; exit 1; }



# Local DNS resolvers
NAMESERVERS=`cat /etc/resolv.conf | grep ^nameserver | cut -d " " -f 2 | sed 's/\(.*\)/&#&/'`

# Upstream DNS resolvers
# Non-standard ports may be specified e.g. 127.0.0.1:5353#mydns
PROVIDERS="
1.1.1.1#cloudflare
4.2.2.1#level3
Expand All @@ -22,42 +24,65 @@ PROVIDERS="
8.26.56.26#comodo
"

# Domains to test. Duplicated domains are ok
DOMAINS2TEST="www.google.com amazon.com facebook.com www.youtube.com www.reddit.com wikipedia.org twitter.com gmail.com www.google.com whatsapp.com"
# Number of domains to test
NUM_DOMAINS2TEST=10

# Random domains to choose from
RANDOM_DOMAINS=(
`curl -sS https://raw.githubusercontent.com/opendns/public-domain-lists/master/opendns-top-domains.txt`
`curl -sS https://raw.githubusercontent.com/opendns/public-domain-lists/master/opendns-random-domains.txt`
)

heading="DOMAINS TO TEST: "; echo -n "$heading"
results_indent=$((${#heading} - 3))
results_tempfile=`mktemp`
domains2test=""
num_random_domains=${#RANDOM_DOMAINS[*]}

totaldomains=0
printf "%-18s" ""
for d in $DOMAINS2TEST; do
totaldomains=$((totaldomains + 1))
printf "%-8s" "test$totaldomains"
for ((i=1; i <= $NUM_DOMAINS2TEST; i++)); do
if [ $i -gt 1 ]; then
printf "%-${#heading}s" ""
fi

domain_id=`printf "%5s" "($i) "`; echo -n "$domain_id"
domain_heading=" $domain_id"
results_header="$results_header$domain_heading"
random_domain=${RANDOM_DOMAINS[$RANDOM % num_random_domains]}; echo $random_domain
domains2test="$domains2test $random_domain"
done
printf "%-8s" "Average"
echo ""

avg_heading=" AVERAGE"
results_header="$results_header$avg_heading"
printf "\n%-${results_indent}s" ""
echo "$results_header"

for p in $NAMESERVERS $PROVIDERS; do
pip=${p%%#*}
pname=${p##*#}
ftime=0

printf "%-18s" "$pname"
for d in $DOMAINS2TEST; do
ttime=`$dig +tries=1 +time=2 +stats @$pip $d |grep "Query time:" | cut -d : -f 2- | cut -d " " -f 2`
printf "%-${results_indent}s" "$pname" | tee -a $results_tempfile
for d in $domains2test; do
ttime=`$dig +tries=1 +time=2 +stats @${pip/:/" -p"} $d | grep "Query time:" | cut -d : -f 2- | cut -d " " -f 2`
if [ -z "$ttime" ]; then
#let's have time out be 1s = 1000ms
ttime=1000
elif [ "x$ttime" = "x0" ]; then
ttime=1
fi

printf "%-8s" "$ttime ms"
printf "%${#domain_heading}s" "$ttime ms" | tee -a $results_tempfile
ftime=$((ftime + ttime))
done
avg=`bc -lq <<< "scale=2; $ftime/$totaldomains"`
avg=`bc -lq <<< "scale=2; $ftime/$NUM_DOMAINS2TEST"`

echo " $avg"
printf "%${#avg_heading}s\n" $avg | tee -a $results_tempfile
done

printf "\n%-${results_indent}s" "SORTED BY AVG."
echo "$results_header"
sort -g -k$((2*$NUM_DOMAINS2TEST + 2)) $results_tempfile
rm $results_tempfile


exit 0;