Added support for DNS to the IP addresses script.

Author: tdulcet

README.md

@@ -93,7 +93,7 @@ wget -qO - https://raw.github.com/tdulcet/Linux-System-Information/master/typein
 
 ### Public IP addresses
 
-Outputs your public IP addresses using a couple dozen different services to find the one with the best HTTPS response times on your network.
+Outputs your public IP addresses using a couple dozen different services to find the one with the best HTTPS and DNS response times on your network.
 
 ```bash
 wget -qO - https://raw.github.com/tdulcet/Linux-System-Information/master/ipinfo.sh | bash -s

ipinfo.sh

@@ -5,14 +5,14 @@
 # wget -qO - https://raw.github.com/tdulcet/Linux-System-Information/master/ipinfo.sh | bash -s --
 # ./ipinfo.sh
 
-# Adapted from: https://github.com/rsp/scripts/blob/master/externalip.md
+# Adapted from: https://github.com/rsp/scripts/blob/master/externalip-benchmark.md
 
 if [[ $# -ne 0 ]]; then
 	echo "Usage: $0" >&2
 	exit 1
 fi
 
-urls=(
+URLS=(
 	alma.ch/myip.cgi
 	api.ipify.org/
 	# bot.whatismyipaddress.com/
@@ -25,7 +25,7 @@ urls=(
 	icanhazip.com/
 	ident.me/ # v4.ident.me/ # v6.ident.me/
 	ifconfig.co/
-	ifconfig.me/
+	ifconfig.me/ip
 	ifconfig.pro/
 	ipaddr.site/
 	ipecho.net/plain
@@ -34,26 +34,87 @@ urls=(
 	ip.tyk.nu/
 	l2.io/ip
 	# myip.addr.space/
-	# tnx.nl/ip
+	tnx.nl/ip
 	wgetip.com/
 	ifconfig.io/ip
 	silisoftware.com/tools/ip.php
+	corz.org/ip
+	ifcfg.me/
+	api.infoip.io/ip
+	whatismyip.akamai.com/
+	ip-adresim.app/
+	ipaddress.sh/
+	myexternalip.com/raw
+	myip.dnsomatic.com/
+	trackip.net/ip
+	wtfismyip.com/text
+	myip.wtf/text
+	ipapi.co/ip
+	ip2location.io/ip
+	checkip.spdyn.de/
+	www.nsupdate.info/myip
+	ip.changeip.com/
 	# gso.cs.pdx.edu/ip/
 )
 
+SERVERS=(
+	one.one.one.one
+	dns.opendns.com
+	resolver{1..4}.opendns.com
+	ns1-1.akamaitech.net
+	ns{1..4}.google.com
+)
+
+NAMES=(
+	whoami.cloudflare
+	myip.opendns.com
+	myip.opendns.com{,,,}
+	whoami.akamai.net
+	o-o.myaddr.l.google.com{,,,}
+)
+
+TYPES=(
+	TXT
+	''
+	''{,,,}
+	''
+	''{,,,}
+)
+
+CLASSES=(
+	CH
+	''
+	''{,,,}
+	''
+	''{,,,}
+)
+
 echo -e "\nPublic IP addresses"
 
 for ip in 4 6; do
-	echo -e "\nIPv$ip address Best HTTPS response times:\n"
+	echo -e "\nBest HTTPS response times IPv$ip address:\n"
+
+	for url in "${URLS[@]}"; do
+		answer=''
+		if output=$(curl -"$ip" -m10 -sSfLw '\n%{time_total}\n' "https://$url" 2>&1); then
+			answer=$(echo "$output" | head -n 1)
+		fi
+		time=$(echo "$output" | tail -n 1)
+		printf '%s seconds \thttps://%s\t%s\n' "$time" "$url" "${answer:--}"
+	done | sort -n | awk -F'[ ]' '{ $1 *= 1000; $2 = "ms"; print }' | column -t -s $'\t'
+done
+
+for ip in 4 6; do
+	echo -e "\nBest DNS response times IPv$ip address:\n"
 
-	for url in "${urls[@]}"; do
+	for i in "${!SERVERS[@]}"; do
 		answer=''
-		if cout=$(curl -"$ip" -m10 -sSLw '\n%{time_total}\n' "https://$url" 2>&1); then
-			answer=$(echo "$cout" | head -n 1)
+		if output=$(dig -"$ip" -u "@${SERVERS[i]}" "${NAMES[i]}" "${TYPES[i]:-IN}" "${CLASSES[i]:-ANY}" 2>&1); then
+			answer=$(echo "$output" | grep -v '^;' | awk '$4 == "A" || $4 == "AAAA" || $4 == "TXT" { print $4"\t"$5 }' | head -n 1)
 		fi
-		time=$(echo "$cout" | tail -n 1)
-		printf '%s seconds\thttps://%s\t%s\n' "$time" "$url" "${answer:--}"
-	done | sort -n | column -t -s $'\t'
+		time=$(echo "$output" | sed -n 's/;; Query time: *//p')
+		printf '%s \t%s\t%s\t%s\n' "${time:-0 usec}" "${SERVERS[i]}" "${NAMES[i]}" "${answer:--}"
+	done | sort -n | awk -F'[ ]' '{ $1 /= 1000; $2 = "ms"; print }' | column -t -s $'\t'
 done
 
 echo