init

he-ddns

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+#!/bin/bash
+
+# function to exit with message and code
+die() {
+	[[ -n "$2" ]] && printf "%s\n" "$2"
+	[[ -n "$1" ]] && exit "$1" || exit 127
+}
+
+url="https://dyn.dns.he.net/nic/update"
+
+help_text="Usage: $0 [OPTIONS] DOMAIN KEYFILE
+Update Hurricane Electric Dynamic DNS for DOMAIN with key in KEYFILE.
+Requires curl to be installed in \$PATH.
+
+Options:
+  -4, --ipv4    use IPv4
+  -6, --ipv6    use IPv6
+  -u, --url     url to use, defaults to $url
+  -h, --help    Display this help.
+
+https://gitlab.com/rascul/he-ddns
+"
+
+show_help() {
+	printf "%s" "$help_text"
+}
+
+args=
+ipv4=
+ipv6=
+
+while (($#)); do
+	case $1 in
+		-4)
+			ipv4=true
+			;;
+		-6)
+			ipv6=true
+			;;
+		-u|--url)
+			if [[ -n "$2" ]]; then
+				url="$2"
+				shift
+			else
+				die $LINENO "$help_text"
+			fi
+			;;
+		-h|--help)
+			show_help
+			exit
+			;;
+		*)
+			args+=("$1")
+			;;
+	esac
+	shift
+done
+
+domain="${args[1]}"
+key=$(<"${args[2]}") || die $LINENO
+
+if [[ "$ipv4" != "true" ]] && [[ "$ipv6" != "true" ]]; then
+	echo "Must specify either IPv4 or IPv6"
+fi
+
+if [[ "$ipv4" == "true" ]]; then
+	ip="$(curl -sSL4 https://ifconfig.co/ip)" || die $LINENO
+	curl -sSL4 "$url" -d "hostname=$domain" -d "password=$key" -d "myip=$ip" || die $LINENO
+	echo
+fi
+
+if [[ "$ipv6" == "true" ]]; then
+	ip="$(curl -sSL6 https://ifconfig.co/ip)" || die $LINENO
+	curl -sSL6 "$url" -d "hostname=$domain" -d "password=$key" -d "myip=$ip" || die $LINENO
+	echo
+fi

he-ddns4@.service

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+[Unit]
+Description=Update Hurricane Electric Dynamic DNS
+After=network.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/local/bin/he-ddns -4 %i /etc/he-ddns/%i
+
+[Install]
+WantedBy=multi-user.target

he-ddns4@.timer

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+[Unit]
+Description=Update Hurricane Electric Dynamic DNS
+
+[Timer]
+OnUnitActiveSec=20min
+
+[Install]
+WantedBy=timers.target

he-ddns6@.service

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+[Unit]
+Description=Update Hurricane Electric Dynamic DNS
+After=network.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/local/bin/he-ddns -6 %i /etc/he-ddns/%i
+
+[Install]
+WantedBy=multi-user.target

he-ddns6@.timer

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+[Unit]
+Description=Update Hurricane Electric Dynamic DNS
+
+[Timer]
+OnUnitActiveSec=20min
+
+[Install]
+WantedBy=timers.target