Cloudflare-CLI-DDNS-Update.sh

#!/usr/bin/env bash

###############################################################################
#                               Cloudflare-CLI                                #
#                  https://github.com/cvc90/Cloudflare-CLI/                   #
#                                                                             #
#   CLI utility that manages Cloudflare services through the Cloudflare API   #
#                                                                             #
#    		 Script file Cloudflare-CLI-DDNS-Update.sh 		      #
#   A script to update Dynamic DDNS for domains in your Cloudflare account    #
#                                                                             #
#          Usage: ./Cloudflare-CLI-DDNS-Update.sh <domain>	              #
###############################################################################

conffile=/etc/Cloudflare-CLI-DDNS-Update.conf
[ -n "$1" ] && conffile=$1
set -e
declare -a dyns
. "$conffile"
set +e

tstamp=`date +%s`
latestip=''
lastchange=''


if [ -z "$zone" ]
then
	echo "Zone name is not set up." >&2
	exit 1
fi
if [ -z "${dyns[0]}" ]
then
	echo "Not any subdomain is set up." >&2
	exit 1
fi


echo -n "Getting external IP ... " >&2
# put your script here to obtain your external ip:
# see github.com/bAndie91/extip
if [ ! `which extip` ]; then
	currentip=`curl icanhazip.com`
else
	currentip=`extip -q`
fi
echo "$currentip" >&2

if [ -z "$currentip" ]
then
	echo "Could not get external IP." >&2
	exit 1
fi


if [ -n "$subdom" ]
then
	echo "Getting DDNS log from CloudFlare ..." >&2
	declare -A iplog
	IFS=$'\n'
	history=`cloudflare list records "$zone" | grep -E "^.*?\\.$subdom\\s" | sed -e 's/\./ /' | awk '{print $1,$5}' | sort -n`
	if [ -n "$history" ]
	then
		for str in $history
		do
			tag=${str%% *}
			ip=${str##* }
			
			iplog[$tag]=$ip
			latestip=$ip
			lastchange=$tag
		done
	fi
	IFS=$'\n\t '
else
	echo "Getting last IP from CloudFlare ..." >&2
	sub1=${dyns[0]}
	latestip=`cloudflare list records "$zone" | sed -ne "s/^$sub1\s\+\S\+\s\+A\s\+\(\S\+\).*/\1/ p"`
fi



if [ -z "$latestip" ]
then
	echo "There is no last entry." >&2
else
	echo "Last entry: $latestip" >&2
fi


echo "Record current IP: $currentip" >&2
if [ "$latestip" != "$currentip" ]
then
	if type Cloudflare-CLI-DDNS-Update-callback >/dev/null 2>&1
	then
		Cloudflare-CLI-DDNS-Update-callback "$latestip" "$lastchange" "$currentip"
	fi
	lastchange=$tstamp
	if [ -n "$subdom" ]
	then
		cloudflare add record "$zone" A "$tstamp.$subdom" "$currentip"
	fi
else
	echo "Last IP is up to date" >&2
fi

for dyn in "${dyns[@]}"
do
	# Update dynamic records anyway
	cloudflare set record "$dyn.$zone" type A content "$currentip"
	cloudflare -q set record "lastchange.$dyn.$zone" type TXT content "${lastchange:-$tstamp}"
done