316 lines
11 KiB
Bash
Executable File
316 lines
11 KiB
Bash
Executable File
#!/usr/bin/env sh
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# Update a nameserver entry at inwx with the current WAN IP (DynDNS)
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# Copyright 2013 Christian Busch
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# http://github.com/chrisb86/
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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# Print and log messages when verbose mode is on
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# Usage: chat [0|1|2|3] MESSAGE
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## 0 = regular output
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## 1 = error messages
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## 2 = verbose messages
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## 3 = debug messages
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chat () {
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messagetype=$1
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message=$2
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log=$nsupdate_log_dir/$nsupdate_log_file
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log_date=$(date "+$log_date_format")
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if [ $messagetype = 0 ]; then
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echo "[$log_date] [INFO] $message" | tee -a $log ;
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fi
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#
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if [ $messagetype = 1 ]; then
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echo "[$log_date] [ERROR] $message" | tee -a $log ; exit 1;
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fi
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if [ $messagetype = 2 ] && [ "$VERBOSE" = true ]; then
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echo "[$log_date] [INFO] $message" | tee -a $log
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fi
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if [ $messagetype = 3 ] && [ "$DEBUG" = true ]; then
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echo "[$log_date] [DEBUG] $message" | tee -a $log
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fi
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}
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# Load config file, set default variables and get wan IP
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# Usage: init
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init () {
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nsupdate_conf_file="nsupdate.conf"
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basedir="${BASEDIR:-/usr/local/etc}"
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nsupdate_conf_dir="${NSUPDATE_CONF_DIR:-$basedir/nsupdate}"
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## Try to load nsupdate.conf
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[ -f "./$nsupdate_conf_file" ] && . ./$nsupdate_conf_file
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[ -f "$nsupdate_conf_dir/$nsupdate_conf_file" ] && . $nsupdate_conf_dir/$nsupdate_conf_file
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VERBOSE="${VERBOSE:-false}"
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DEBUG="${DEBUG:-false}"
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if [ "$DEBUG" = true ]; then
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set -x
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fi
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nsupdate_confd_dir="${NSUPDATE_CONFD_DIR:-$nsupdate_conf_dir/conf.d}"
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log_date_format="${LOG_DATE_FORMAT:-%Y-%m-%d %H:%M:%S}"
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nsupdate_log_dir="${NSUPDATE_LOG_DIR:-/var/log/nsupdate}"
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nsupdate_log_file="${NSUPDATE_LOG_FILE:-nsupdate.log}"
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tmp_dir="${NSUPDATE_TMP_DIR:-/tmp}"
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nsupdate_conf_extension="${NSUPDATE_CONF_EXTENSION:-.conf}"
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inwx_api="https://api.domrobot.com/xmlrpc/"
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inwx_api_xpath_ip='string(/methodResponse/params/param/value/struct/member[name="resData"]/value/struct/member[name="record"]/value/array/data/value/struct/member[name="content"]/value/string)'
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inwx_api_xpath_id='string(/methodResponse/params/param/value/struct/member[name="resData"]/value/struct/member[name="record"]/value/array/data/value/struct/member[name="id"]/value/int)'
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inwx_nameserver="ns.inwx.de"
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ip_check_site="${NSUPDATE_IP_CHECK_SITE:-https://api64.ipify.org}"
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## Get WAN IP 4
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wan_ip4="$(curl -s -4 ${ip_check_site})"
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chat 2 "WAN IP 4: ${wan_ip4}"
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## Get WAN IP 6
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wan_ip6="$(curl -s -6 ${ip_check_site})"
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chat 2 "WAN IP 6: ${wan_ip6}"
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}
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# Get the data for a given domain
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# Usage: get_inwx_domain_id
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get_domain_info () {
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## Check if xmllint is installed and use it.
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if command -v xmllint > /dev/null 2>&1; then
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## File name for tempory file to store the XML from API
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tmp_file="${domain}_${record_type}_$(date +%s).xml"
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## Check if WAN_IP_COMMAND is set and use it for retrieving the IP
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if [ -z $WAN_IP_COMMAND ]; then
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WAN_IP_COMMAND="${IPCOMMAND:-${WAN_IP_COMMAND}}" ## for backwards compatibility
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wan_ip="${WAN_IP_COMMAND}"
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else
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## Otherwise use IP retrieved from web site
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## Get connection type by record type
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if [ "${record_type}" = "AAAA" ]; then
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wan_ip="${wan_ip6}"
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else
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wan_ip="${wan_ip4}"
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fi
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fi
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chat 3 "Found xmllint. Using curl for retrieving data from INWX API."
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inwx_api_xml_info="<?xml version=\"1.0\"?>
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<methodCall>
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<methodName>nameserver.info</methodName>
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<params>
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<param>
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<value>
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<struct>
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<member>
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<name>user</name>
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<value>
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<string>${inwx_user}</string>
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</value>
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</member>
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<member>
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<name>lang</name>
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<value>
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<string>en</string>
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</value>
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</member>
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<member>
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<name>pass</name>
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<value>
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<string>${inwx_password}</string>
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</value>
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</member>
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<member>
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<name>domain</name>
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<value>
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<string>${main_domain}</string>
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</value>
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</member>
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<member>
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<name>name</name>
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<value>
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<string>${domain}</string>
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</value>
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</member>
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<member>
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<name>type</name>
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<value>
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<string>${record_type}</string>
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</value>
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</member>
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</struct>
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</value>
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</param>
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</params>
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</methodCall>"
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## Get domain info from INWX API and save it to a temporary file
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curl -s -X POST ${inwx_api} -H "Content-Type: application/xml" -d "${inwx_api_xml_info}" -o ${tmp_dir}/${tmp_file}
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## Extract ID and IP from INWX data
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inwx_domain_ip="$(xmllint --xpath ${inwx_api_xpath_ip} ${tmp_dir}/${tmp_file})"
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inwx_domain_id="$(xmllint --xpath ${inwx_api_xpath_id} ${tmp_dir}/${tmp_file})"
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## Remove domain info tmp file
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rm ${tmp_dir}/${tmp_file}
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else
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## Check if nslookup is installed and use it to get the IP
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if command -v nslookup > /dev/null 2>&1; then
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chat 3 "Found nslookup. Using it for IP from INWX nameserver."
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inwx_domain_ip=$(nslookup -sil -type=${record_type} ${domain} - ${inwx_nameserver} | tail -2 | head -1 | cut -d' ' -f2)
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## Check if drill is installed and use it to get the IP
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else command -v drill > /dev/null 2>&1;
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chat 3 "Found drill. Using it for IP from INWX nameserver."
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inwx_domain_ip=$(drill ${domain} @${inwx_nameserver} ${record_type} | head -7 | tail -1 | cut -f2 -d$'\t' -f5)
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fi
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## Set domain ID from config file
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chat 3 "Trying to get domain ID from config file."
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inwx_domain_id="${INWX_DOMAIN_ID}"
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fi
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if [ -z "$inwx_domain_ip" ]; then
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chat 1 "Couldn't get current IP. please check the installation instructions."
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fi
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if [ -z "$inwx_domain_id" ]; then
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chat 1 "Couldn't find domain ID. please check the installation instructions."
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fi
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}
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# Update a dns record
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# Usage: update_record
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update_record () {
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chat 3 "Using curl to update the DNS record with INWX API."
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inwx_api_xml_update_record="<?xml version=\"1.0\"?>
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<methodCall>
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<methodName>nameserver.updateRecord</methodName>
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<params>
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<param>
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<value>
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<struct>
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<member>
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<name>user</name>
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<value>
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<string>${inwx_user}</string>
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</value>
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</member>
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<member>
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<name>lang</name>
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<value>
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<string>en</string>
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</value>
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</member>
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<member>
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<name>pass</name>
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<value>
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<string>${inwx_password}</string>
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</value>
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</member>
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<member>
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<name>id</name>
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<value>
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<int>${inwx_domain_id}</int>
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</value>
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</member>
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<member>
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<name>content</name>
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<value>
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<string>${wan_ip}</string>
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</value>
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</member>
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<member>
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<name>ttl</name>
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<value>
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<int>${record_ttl}</int>
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</value>
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</member>
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</struct>
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</value>
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</param>
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</params>
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</methodCall>"
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curl -s -X POST "${inwx_api}" -H "Content-Type: application/xml" -d "${inwx_api_xml_update_record}"
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}
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## Initalize nsupdate
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init
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# Check if there are any usable config files
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if ls ${nsupdate_confd_dir}/*${nsupdate_conf_extension} > /dev/null 2>&1; then
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# Loop through config files
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for f in ${nsupdate_confd_dir}/*${nsupdate_conf_extension}
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do
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. ${f}
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chat 2 "Loading config file ${f}"
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## Get variables from config file
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inwx_user="${INWX_USER:-$NSUPDATE_INWX_USER}"
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inwx_password="${INWX_PASSWORD:-$NSUPDATE_INWX_PASSWORD}"
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main_domain="${MAIN_DOMAIN}"
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domain="${DOMAIN}"
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RECORD_TYPE="${TYPE:-$RECORD_TYPE}" ## For backwards compatibility in config files
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RECORD_TTL="${TTL:-$RECORD_TTL}" ## For backwards compatibility in config files
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record_type="${RECORD_TYPE:-$NSUPDATE_RECORD_TYPE}"
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record_ttl="${RECORD_TTL:-$NSUPDATE_RECORD_TTL}"
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## Get domain info
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get_domain_info
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## Verbose output
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chat 2 "DOMAIN: ${domain}"
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chat 2 "RECORD TYPE: ${record_type}"
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chat 2 "RECORD TTL: ${record_ttl}"
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chat 2 "INWX DOMAIN ID: ${inwx_domain_id}"
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chat 2 "INWX IP: ${inwx_domain_ip}"
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## Check if record needs an update and do it
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if [ "${inwx_domain_ip}" != "${wan_ip}" ]; then
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chat 0 "Updating DNS record for ${domain} [${record_type}]. Old IP: ${inwx_domain_ip}. New IP: ${wan_ip}."
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update_record ${inwx_user} ${inwx_password} ${inwx_domain_id} ${wan_ip} ${record_ttl}
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else
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chat 0 "No update required for ${domain} [${record_type}]."
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fi
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## Clean up variables for a fresh start
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unset INWX_USER
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unset INWX_PASSWORD
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unset MAIN_DOMAIN
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unset DOMAIN
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unset RECORD_TYPE
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unset RECORD_TTL
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unset tmp_file
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unset inwx_domain_id
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unset inwx_domain_ip
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unset wan_ip
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done
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else
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chat 1 "Couldn't find any usable config files. Check installation instructions."
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fi |