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CloudFlare dynamic dns updater module for Synology
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#!/bin/sh | |
# cloudflareddns.sh - dynamic dns updater module for Synology | |
# | |
# Author: | |
# Michael Wildman (http://mwild.me) | |
# | |
# Version: | |
# 0.2 | |
# | |
# Description: | |
# copy to /sbin/cloudflaredns.sh | |
# make executable (chmod +x) | |
# add the following entry to /etc.defaults/ddns_provider.conf | |
# | |
# [CloudFlare] | |
# modulepath=/sbin/cloudflaredns.sh | |
# queryurl=https://www.cloudflare.com/api_json.html?a=rec_edit&tkn=__PASSWORD__&email=__USERNAME__&z=__HOSTNAME__&content=__MYIP__ | |
# | |
# (note that URL is not actually used, DSM will pass us the variables) | |
# run a rec_load_all query to get the record id | |
# (see https://www.cloudflare.com/docs/client-api.html) | |
# | |
# Changelog: | |
# 0.2: | |
# - Simplified this thing to its most basic requirements (curl + logging) | |
# - Now either returns 'good' or the result (no checking for cases -- the log was always more useful anyway!) | |
# | |
# Based on Brian Schmidt Pedersen (http://blog.briped.net) gratisdns.sh | |
# TODO | |
# read addition parameters from cloudflare api calls | |
# | |
# these variables are passed by DSM | |
# username is your email | |
__USERNAME__="$(echo ${@} | cut -d' ' -f1)" | |
# password is your cloudflare API key | |
__PASSWORD__="$(echo ${@} | cut -d' ' -f2)" | |
__HOSTNAME__="$(echo ${@} | cut -d' ' -f3)" | |
__MYIP__="$(echo ${@} | cut -d' ' -f4)" | |
# log location | |
__LOGFILE__="/var/log/cloudflareddns.log" | |
# additional parameters needed for CloudFlare | |
__RECTYPE__="A" | |
__RECID__="" | |
__RECNAME__="" | |
__TTL__="1" | |
__SERVICEMODE__="0" | |
log() { | |
__LOGTIME__=$(date +"%b %e %T") | |
if [ "${#}" -lt 1 ]; then | |
false | |
else | |
__LOGMSG__="${1}" | |
fi | |
if [ "${#}" -lt 2 ]; then | |
__LOGPRIO__=7 | |
else | |
__LOGPRIO__=${2} | |
fi | |
logger -p ${__LOGPRIO__} -t "$(basename ${0})" "${__LOGMSG__}" | |
echo "${__LOGTIME__} $(basename ${0}) (${__LOGPRIO__}): ${__LOGMSG__}" >> ${__LOGFILE__} | |
} | |
__URL__="https://www.cloudflare.com/api_json.html?a=rec_edit&tkn=${__PASSWORD__}&email=${__USERNAME__}&z=${__HOSTNAME__}&type=${__RECTYPE__}&id=${__RECID__}&name=${__RECNAME__}&content=${__MYIP__}&ttl=${__TTL__}&service_mode=${__SERVICEMODE__}" | |
# Update DNS record: | |
log "Updating with ${__MYIP__}..." 7 | |
__RESPONSE__=$(curl --silent "${__URL__}") | |
# Strip the result element from response json | |
__RESULT__=$(echo ${__RESPONSE__} | grep -o -E .result.:.[A-z]+.) | |
case ${__RESULT__} in | |
'"result":"success"') | |
__STATUS__='good' | |
true | |
;; | |
*) | |
__STATUS__="${__RESULT__}" | |
log "__RESPONSE__=${__RESPONSE__}" 5 | |
false | |
;; | |
esac | |
log "Status: ${__STATUS__}" 6 | |
printf "%s" "${__STATUS__}" |
@mrikirill just above your comment, I mention cloudflareddns which addresses all these edge case from the start.
nice script
personally i went this route as it's less invasive https://hub.docker.com/r/oznu/cloudflare-ddns/#!
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@dvershinin yep mate, you're right, didn't think about this case. I'm going to fix it. Feel free to send an issue in my project)