| set -e | |
| set -u | |
| __usage=" | |
| $0 | |
| OpenWRT DDNS updater ('ddns-scripts') script for the Porkbun API. | |
| The script has been extended to support running it directly (eg. via cron) without having to install the \`ddns-scripts\` opkg package. | |
| Suggested script path: /usr/bin/ddns-update-porkbun.sh | |
| Usage (via DDNS updater): | |
| - Set the DDNS service provider to '-- custom --' | |
| - Custom update-script: Path to this script | |
| - Complete 'Lookup Hostname', 'Domain', 'Username' and 'Password' fields. | |
| Usage directly #1: | |
| Export the following envs before running the script: | |
| \$hostname - Lookup hostname, the FQDN of the ddns record, eg. \`myhost.subdomain.mydomain.com\` | |
| \$domain - The root of the porkbun domain, eg. \`mydomain.com\` | |
| \$username - Porkbun API username ('apikey') | |
| \$password - Porkbun API secret ('secretapikey') | |
| \$__IP (optional) - The actual public IP. If not set, will be looked it up form icanhazip.com. | |
| \$REGISTERED_IP (optional) - The last registered IP. If not set, it will be looked up using nslookup at 1.1.1.1. | |
| Usage directly #2: | |
| ddns-update-porkbun.sh <domain> <hostname> <username> <password> | |
| eg: | |
| ddns-update-porkbun.sh mydomain.com myhost.subdomain.mydomain.com pk1_b7..f8cd sk1_65..135f | |
| " | |
| if [[ "${1-}" == '-h' || "${1-}" == '--help' ]]; then | |
| echo "$__usage" | |
| exit 0 | |
| fi | |
| if [[ -z "${__IP-}" ]]; then | |
| # The script was started outside of the OpenWRT DDNS updater, so we need to exit when there are no IP changes, instead of triggering a forced DNS update. | |
| manual_script_run='true' | |
| [[ -z "${domain-}" && -n "${1-}" ]] && domain="$1" | |
| [[ -z "${hostname-}" && -n "${2-}" ]] && hostname="$2" | |
| [[ -z "${username-}" && -n "${3-}" ]] && username="$3" | |
| [[ -z "${password-}" && -n "${4-}" ]] && password="$4" | |
| fi | |
| # Mocking write_log to add support for running the script directly. | |
| command -v write_log >/dev/null || alias write_log=echo | |
| write_log 5 'Starting: ddns-update-porkbun.sh' | |
| [[ -z "${domain-}" ]] && { echo "ERROR: \$domain env missing.""$__usage"; exit 1; } | |
| [[ -z "${hostname-}" ]] && { echo "ERROR: \$hostname env missing.""$__usage"; exit 1; } | |
| [[ -z "${apikey-}" ]] && { echo "ERROR: \$apikey env missing.""$__usage"; exit 1; } | |
| [[ -z "${secretapikey-}" ]] && { echo "ERROR: \$secretapikey env missing.""$__usage"; exit 1; } | |
| if [[ -z "${__IP-}" ]]; then | |
| __IP=$(wget -q https://icanhazip.com -O -) | |
| write_log 5 "Detected IP: $__IP" | |
| fi | |
| if [[ -z "${REGISTERED_IP-}" ]]; then | |
| REGISTERED_IP=$(nslookup -type=A "$hostname" 1.1.1.1 | grep -E 'Address: \d+' | cut -d\ -f2) | |
| write_log 5 "Looked up registered IP: $REGISTERED_IP" | |
| fi | |
| porkbun_record="${hostname%.$domain}" | |
| [[ "$__IP" == "$REGISTERED_IP" && -n "${manual_script_run-}" ]] && { write_log 5 "There are no IP changes, exiting: $__IP == $REGISTERED_IP"; exit 0; } | |
| [[ "$__IP" == "$REGISTERED_IP" ]] && write_log 7 "The IP hasn't changed, DDNS probably triggered a forced update." | |
| # Check if DNS record exists | |
| current_record=$(wget --post-data="{ \"apikey\": \"$username\", \"secretapikey\": \"$password\" }" \ | |
| https://porkbun.com/api/json/v3/dns/retrieveByNameType/$domain/A/${porkbun_record} -O -) | |
| echo $current_record | grep -q 'content' || record_missing='true' | |
| if [[ "${record_missing-}" == 'true' ]]; then | |
| # Create new DNS record | |
| wget --post-data="{ \"apikey\": \"$username\", \"secretapikey\": \"$password\", \"name\": \"${porkbun_record}\", \"type\": \"A\", \"content\": \"$__IP\", \"ttl\": \"300\" }" \ | |
| "https://porkbun.com/api/json/v3/dns/create/$domain" -O - | |
| write_log 7 "Created DNS record: $hostname -> $__IP" | |
| else | |
| # Update existing record | |
| wget --post-data="{ \"apikey\": \"$username\", \"secretapikey\": \"$password\", \"content\": \"$__IP\", \"ttl\": \"300\" }" \ | |
| "https://porkbun.com/api/json/v3/dns/editByNameType/$domain/A/${porkbun_record}" -O - | |
| write_log 7 "Updated DNS record: $hostname $REGISTERED_IP -> $__IP" | |
| fi | |
| write_log 5 'Exiting: ddns-update-porkbun.sh' |
| ddns.global=ddns | |
| ddns.global.ddns_dateformat='%F %R' | |
| ddns.global.ddns_loglines='250' | |
| ddns.global.ddns_rundir='/var/run/ddns' | |
| ddns.global.ddns_logdir='/var/log/ddns' | |
| ddns.porkbun.lookup_host="$LOOKUP_HOST_FQDN" | |
| ddns.porkbun.domain="$DOMAIN" | |
| ddns.porkbun.username="$APIKEY" | |
| ddns.porkbun.password="$SECRETAPIKEY" | |
| ddns.porkbun=service | |
| ddns.porkbun.use_ipv6='0' | |
| ddns.porkbun.enabled='1' | |
| ddns.porkbun.update_script='/usr/bin/ddns-update-porkbun.sh' | |
| ddns.porkbun.ip_source='network' | |
| ddns.porkbun.ip_network='wan' | |
| ddns.porkbun.interface='wan' | |
| ddns.porkbun.use_syslog='2' | |
| ddns.porkbun.check_unit='minutes' | |
| ddns.porkbun.force_unit='minutes' | |
| ddns.porkbun.retry_unit='seconds' |
Update by curl:
curl -X POST "https://porkbun.com/api/json/v3/dns/editByNameType/$domain/A/${porkbun_record}"
-H "Content-Type: application/json"
--data "{ "username": "$username", "secretusername": "$password", "content": "$__IP", "ttl": "300" }"