#!/bin/bash
# NameCheap Dynamic IP Domain Sync Script
# For Multiple Records / Sub Domains
#	By Ben A  -  LOSTGEEK.NET  -  2024

# Provide your info
DOMAIN="domain.com"
PASSKEY="xxxxxxxxxxxxxxx"
SUBDOMS=("@" "www" "ben") # All Sub-Domains. "@" = Domain w/o prefix.

# We get IP for domain, and WAN IP...
   DOMIP=$(ping -c1 $DOMAIN | sed -nE 's/^.*\(([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)\).*$/\1/p' | head -n 1)
   WANIP=$(curl -s checkip.amazonaws.com)
   DTSTA=$(date +"%Y%m%d_%H%M%S")
## Line below works on router/firewall
#   WANIP=$(ifconfig wan | awk '/inet / {print $2}' | cut -d: -f2)

# debug ...
echo $DOMIP   " is DOMIP"
echo $WANIP   " is WANIP"
echo
#

# Check for --force argument
if [[ "$1" == "--force" ]]; then
   # We skip check...
   echo "Attempting update(s) for $DOMAIN..."
else
   if [ "$WANIP" == "$DOMIP" ]; then
   echo "Domain already set to correct address, NO ACTION NEEDED exiting..."
   # Now, we log that we ran... (and didn't need to do anything!)
   echo $DTSTA " -- NO ACTION, DOMAIN GOOD" >> /home/ben/scripts/cron/namecheap.log
   exit 0
  fi
 fi

echo "Wan IP: $WANIP  ...  $DOMAIN = $DOMIP ... Will Try Update ..."
# Of course, we log that we did run!
echo $DTSTA " -- IP MISMATCH OR FORCED UPDATE!! SEE INFO:" >> /home/ben/scripts/cron/namecheap.log
echo $DTSTA " -- " $DOMAIN " was set to " $DOMIP " , and WAN IP was " $WANIP "!!" >> /home/ben/scripts/cron/namecheap.log
# Will loop, to update each name...
for SUBDOM in "${SUBDOMS[@]}"; do
   curl "https://dynamicdns.park-your-domain.com/update?host=$SUBDOM&domain=$DOMAIN&password=$PASSKEY&ip=$WANIP"
   sleep 1
done

exit