feat: add dnd for DNS testing

1 files changed, 30 insertions, 0 deletions

diff --git a/sh/dnd b/sh/dnd
new file mode 100755
index 0000000..411ffa6
--- /dev/null
+++ b/sh/dnd
@@ -0,0 +1,30 @@
+#!/bin/sh
+# DNs Drill
+
+# Usage: dnd, dnd -c, dnd 192.168.0.1, dnd 8.8.8.8
+
+cache=false
+while getopts c opt; do
+	case $opt in
+		c)cache=true;;
+		\?)exit 1;;
+	esac
+done
+shift $((OPTIND-1))
+
+if [ "$1" ]; then 
+	echo "$1"
+else
+	echo "default"
+fi
+
+for domain in www.google.com www.baidu.com github.com gitlab.com codeberg.org www.douyu.com flylightning.xyz mirrors.flylightning.xyz git.flylightning.xyz one.sjsu.edu discord.com www.youtube.com mail.google.com mail.yahoo.com en.wikipedia.org zh.wikipedia.org archlinux.org gitlab.archlinux.org aur.archlinux.org wiki.archlinux.org wiki.gentoo.org unix.stackexchange.com stackoverflow.com superuser.com www.reddit.com kyun.host panel.ihostart.com; do
+	if [ "$1" ]; then 
+		drill -- "$domain" "@$1" | awk -F: -v domain="$domain" '/^;; Query time: /{printf("%s%s\n",domain,$2)}'
+	else
+		# awk substr and length:
+		# https://stackoverflow.com/a/14840991
+		# https://unix.stackexchange.com/a/305192
+		resolvectl --cache="$cache" query "$domain" | awk -v domain="$domain" '/Information acquired via protocol DNS in/{printf("%s %s\n",domain,substr($NF,0,length($NF)-1))}'
+	fi
+done