Namecheap DDNS Module for Synology NAS 7.1

README.md

Installation Steps

1. Create the file at /sbin/namecheapddns.sh and make it executable (chmod 0755 /sbin/namecheapddns.sh)

   (Why under /sbin? Merely following the guide described in /etc.defaults/ddns_provider.conf, but you can put it anywhere you want and make it 0755.)

2. Append the following content to /etc.defaults/ddns_provider.conf:

   [Namecheap]
           modulepath=/sbin/namecheapddns.sh
           queryurl=https://namecheap.com
           website=https://namecheap.com

LICENSE

Copyright (c) 2022 Tongliang Liu

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

namecheapddns.sh

#!/bin/bash

# Namespace DDNS Module (namecheapddns.sh)
# This script is released under MIT License (https://choosealicense.com/licenses/mit)
# ==== BEGIN MIT LICENSE ====
# Copyright (c) 2022 Tongliang Liu
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
# ==== END MIT LICENSE ====

# Synology DDNS service will assign the UI inputs to these parameters in the following order when calling module:
#   ($1=username, $2=password, $3=hostname, $4=ip)
#
# The script will use `username` as the domain (like `yourdomain.com`), 
#   and `hostname` as the HOST you set in Namecheap DNS manager (like `www`).

DOMAIN="$1"
PASSWORD="$2"
HOST="$3"
IP="$4"

RES=$(curl -s "https://dynamicdns.park-your-domain.com/update?host=${HOST}&domain=${DOMAIN}&password=${PASSWORD}&ip=${IP}")

ERRCNT=$(echo $RES | sed -n "s/.*<ErrCount>\(.*\)<\/ErrCount>.*/\1/p")

# No error, updated successfully
if [[ $ERRCNT -eq 0 ]]; then
    echo "good"
    exit 0
fi

# Error handling
RESNUM=$(sed -n "s/.*<ResponseNumber>\(.*\)<\/ResponseNumber>.*/\1/p" <<< "$RES")
ERR=$(sed -n "s/.*<Err1>\(.*\)<\/Err1>.*/\1/p" <<< "$RES")

case $RESNUM in
    304156) echo "badauth"
    ;;
    380091) echo "nohost"
    ;;
    *) echo "911 ['${RESNUM}: ${ERR}']"
    ;;
esac

exit 0