174 lines
6.3 KiB
Bash
Executable File
174 lines
6.3 KiB
Bash
Executable File
#!/bin/bash
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### Define functions
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function scriptHelp {
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echo -e "\e[1;31mInvalid parameter(s) provided\e[0m\n"
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echo -e "\e[1;39mUsage:"
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echo -e "\e[1;36m$(basename ${0})" \
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"\e[1;35m-f /path/to/account/details.file" \
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"\e[1;33m-r record.to.update [-r another.record.to.update -r ...]"
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echo -e "\t\e[0;92m[optional parameters]\e[0m\n"
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echo -e "\e[1;39mNotes:\e[0m"
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echo -e "-f and -r parameters are REQUIRED."
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echo -e "Multiple A/AAAA records to update can be specified by supplying"
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echo -e "\tmultiple -r parameters (see examples below)."
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echo "This script can operate only in either IP4 OR IP6 mode. See below."
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echo "This script will NOT verify the format or validity of supplied IP"
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echo -e "\taddresses."
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echo -e "\n\e[1;39mOptional parameters\e[0m"
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echo -e "-i\tUse this IP address when updating DNS records"
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echo -e "\tIf NOT supplied, the script will attempt to auto-detect this"
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echo -e "\tmachine's IP address (depending on -4 or -6 parameters) and"
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echo -e "\tuse that address for DNS updates. The script does NOT check"
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echo -e "\tthe validity of an address supplied using this parameter nor"
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echo -e "\tthe protocol type (IP4 vs IP6)."
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echo -e "-4\tOperate in IP4 mode and update A records (default)"
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echo -e "\tThis is the default operating mode and does not need to be"
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echo -e "\texplicitly specified. Ensure you have supplied a valid IP4"
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echo -e "\taddress using the -i parameter or that your machine's IP4"
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echo -e "\taddress can be correctly detected externally."
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echo -e "-6\tOperate in IP6 mode and update AAAA records"
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echo -e "\tONLY AAAA records will be updated. Ensure you have supplied"
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echo -e "\ta valid IP6 address using the -i parameter or that your"
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echo -e "\tmachine's IP6 address can be correctly detected externally."
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echo -e "\n\e[1;39mExample: \e[0mUse details from myCloudFlareDetails.info"
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echo -e "file in /home/janedoe directory. Update server.mydomain.com A record"
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echo -e "with this machine's auto-detected IP4 address."
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echo -e "\t\e[1;36m$(basename ${0})" \
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"\e[1;35m-f /home/janedoe/myCloudFlareDetails.info"
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echo -e "\t\e[1;33m-r server.mydomain.com\e[0m"
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echo -e "\n\e[1;39mExample: \e[0mUse details from myCloudFlareDetails.info"
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echo -e "file in /home/janedoe directory. Update server.mydomain.com AND"
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echo -e "server2.mydomain.com A records with this machine's auto-detected IP6"
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echo -e "address."
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echo -e "\t\e[1;36m$(basename ${0})" \
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"\e[1;35m-f /home/janedoe/myCloudFlareDetails.info"
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echo -e "\t\e[1;33m-r server.mydomain.com" \
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"-r server2.mydomain.com \e[1;92m-6\e[0m"
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echo -e "\n\e[1;39mExample: \e[0mUse details from myCloudFlareDetails.info"
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echo -e "file in /home/janedoe directory. Update server.mydomain.com A record"
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echo -e "using IP4 address 1.2.3.4."
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echo -e "\t\e[1;36m$(basename ${0})" \
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"\e[1;35m-f /home/janedoe/myCloudFlareDetails.info"
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echo -e "\t\e[1;33m-r server.mydomain.com \e[1;92m-i 1.2.3.4\e[0m"
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echo -e "\n\e[1;39mExample: \e[0mUse details from myCloudFlareDetails.info"
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echo -e "file in /home/janedoe directory. Update server3.mydomain.com AND"
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echo -e "server7.mydomain.com AAAA records using IP6 address FE80::286A:FF91."
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echo -e "\t\e[1;36m$(basename ${0})" \
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"\e[1;35m-f /home/janedoe/myCloudFlareDetails.info"
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echo -e "\t\e[1;33m-r server.mydomain.com" \
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"\e[1;33m-r server2.mydomain.com \e[1;92m-i FE80::286A:FF91\e[0m"
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exit 1
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}
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### end of functions
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### unset environment variables used in this script and initialize arrays
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unset PARAMS
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unset accountFile
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unset ipAddress
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dnsRecords=()
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cfDetails=()
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ip4=1
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ip6=0
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### Process script parameters
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if [ -z $1 ]; then
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scriptHelp
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fi
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while getopts ':f:r:i:46' PARAMS; do
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case "$PARAMS" in
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f)
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accountFile="${OPTARG}"
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;;
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r)
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dnsRecords+=($OPTARG)
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;;
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i)
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ipAddress="$OPTARG"
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;;
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4)
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ip4=1
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ip6=0
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;;
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6)
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ip4=0
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ip6=1
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;;
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?)
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scriptHelp
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;;
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esac
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done
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# Check validity of parameters
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if [ -z "$accountFile" ] || [[ $accountFile == -* ]]; then
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echo -e "\e[1;31mNo file containing account details was specified."
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echo -e "\e[0;31m(-f parameter empty or missing)\e[0m"
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exit 101
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elif [ ! -s "$accountFile" ]; then
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echo -e "\e[1;31mAccount details file is either empty or does not" \
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"exist.\e[0m"
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exit 102
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elif [ -z ${dnsRecords} ]; then
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echo -e "\e[1;31mNo DNS records were specified."
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echo -e "\e[0;31m(-r parameter(s) empty or missing)\e[0m"
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exit 103
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fi
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## Extract needed information from accountDetails file
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mapfile -t cfDetails < "$accountFile"
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## Get current IP address, if not provided in parameters
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if [ -z "$ipAddress" ]; then
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echo -e "\e[0;36mNo IP address for update provided. Detecting" \
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"this machine's IP address..."
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if [ $ip4 -eq 1 ]; then
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echo -e "\e[1;36m(set to IP4 mode)\e[0m"
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ipAddress=$(curl -s http://ipv4.icanhazip.com)
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elif [ $ip6 -eq 1 ]; then
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echo -e "\e[1;36m(set to IP6 mode)\e[0m"
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ipAddress=$(curl -s http://ipv6.icanhazip.com)
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fi
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ipLookupResult=$(echo "$?")
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if [ "$ipLookupResult" -ne 0 ]; then
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echo -e "\e[1;31mIP address for update could not be detected."
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echo -e "\e[0;31mPlease re-run script and specify an IP address" \
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"to use via the -i flag.\e[0m"
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exit 201
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else
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echo -e "\e[0;36mUsing IP address: $ipAddress"
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fi
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fi
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## Check if desired record(s) exist at CloudFlare
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for counter in "${dnsRecords[@]}"; do
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record=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/ \
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${cfDetails[2]}/dns_records?name=${dnsRecords[counter]}&type=A" \
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-H "X-Auth-Email: ${cfDetails[0]}" \
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-H "X-Auth-Key: ${cfDetails[1]}" \
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-H "Content-Type: application/json")
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done
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### Echo results (testing)
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echo -e "\nBased on parameters provided:"
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echo -e "\e[0;35mLogin details at: ${accountFile}"
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echo -e "\tAuthorized email: ${cfDetails[0]}"
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echo -e "\tAuthorized key: ${cfDetails[1]}"
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echo -e "\tZone identifier: ${cfDetails[2]}"
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echo -e "\e[0;33mUpdating records: ${dnsRecords[*]}"
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if [ $ip4 -eq 1 ]; then
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echo -e "\e[0;92mUpdating A records"
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elif [ $ip6 -eq 1 ]; then
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echo -e "\e[0;92mUpdating AAAA records"
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fi
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echo -e "\e[0;92mPointing records to IP: $ipAddress\e[0m\n"
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exit 0
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