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@ -14,110 +14,118 @@ slackuri="" # URI for Slack WebHook "htt |
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discorduri="" # URI for Discord WebHook "https://discordapp.com/api/webhooks/xxxxx" |
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########################################### |
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## Check if we have a public IP |
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########################################### |
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ipv4_regex='([01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])\.([01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])\.([01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])\.([01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])' |
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ip=$(curl -s -4 https://cloudflare.com/cdn-cgi/trace | grep -E '^ip'); ret=$? |
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if [[ ! $ret == 0 ]]; then # In the case that cloudflare failed to return an ip. |
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# Attempt to get the ip from other websites. |
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ip=$(curl -s https://api.ipify.org || curl -s https://ipv4.icanhazip.com) |
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else |
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# Extract just the ip from the ip line from cloudflare. |
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ip=$(echo $ip | sed -E "s/^ip=($ipv4_regex)$/\1/") |
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fi |
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# Use regex to check for proper IPv4 format. |
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if [[ ! $ip =~ ^$ipv4_regex$ ]]; then |
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logger -s "DDNS Updater: Failed to find a valid IP." |
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exit 2 |
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fi |
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########################################### |
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## Check and set the proper auth header |
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########################################### |
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if [[ "${auth_method}" == "global" ]]; then |
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auth_header="X-Auth-Key:" |
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else |
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auth_header="Authorization: Bearer" |
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fi |
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########################################### |
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## Seek for the A record |
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########################################### |
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logger "DDNS Updater: Check Initiated" |
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record=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/$zone_identifier/dns_records?type=A&name=$record_name" \ |
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-H "X-Auth-Email: $auth_email" \ |
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-H "$auth_header $auth_key" \ |
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-H "Content-Type: application/json") |
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########################################### |
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## Check if the domain has an A record |
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########################################### |
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if [[ $record == *"\"count\":0"* ]]; then |
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logger -s "DDNS Updater: Record does not exist, perhaps create one first? (${ip} for ${record_name})" |
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exit 1 |
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fi |
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########################################### |
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## Get existing IP |
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########################################### |
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old_ip=$(echo "$record" | sed -E 's/.*"content":"(([0-9]{1,3}\.){3}[0-9]{1,3})".*/\1/') |
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# Compare if they're the same |
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if [[ $ip == $old_ip ]]; then |
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logger "DDNS Updater: IP ($ip) for ${record_name} has not changed." |
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exit 0 |
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fi |
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########################################### |
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## Set the record identifier from result |
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########################################### |
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record_identifier=$(echo "$record" | sed -E 's/.*"id":"([A-Za-z0-9_]+)".*/\1/') |
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########################################### |
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## Change the IP@Cloudflare using the API |
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########################################### |
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update=$(curl -s -X PATCH "https://api.cloudflare.com/client/v4/zones/$zone_identifier/dns_records/$record_identifier" \ |
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-H "X-Auth-Email: $auth_email" \ |
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-H "$auth_header $auth_key" \ |
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-H "Content-Type: application/json" \ |
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--data "{\"type\":\"A\",\"name\":\"$record_name\",\"content\":\"$ip\",\"ttl\":\"$ttl\",\"proxied\":${proxy}}") |
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########################################### |
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## Report the status |
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########################################### |
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case "$update" in |
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*"\"success\":false"*) |
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echo -e "DDNS Updater: $ip $record_name DDNS failed for $record_identifier ($ip). DUMPING RESULTS:\n$update" | logger -s |
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if [[ $slackuri != "" ]]; then |
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curl -L -X POST $slackuri \ |
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--data-raw '{ |
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"channel": "'$slackchannel'", |
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"text" : "'"$sitename"' DDNS Update Failed: '$record_name': '$record_identifier' ('$ip')." |
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}' |
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validate_variables(){ |
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# Validate required variables |
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if [[ -z $auth_email || -z $auth_key || -z $zone_identifier || -z $record_name ]]; then |
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echo "Missing required variables. Please provide values for 'auth_email', 'auth_key', 'zone_identifier', and 'record_name'." |
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exit 1 |
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fi |
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} |
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check_ipv4_is_available(){ |
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ipv4_regex='([01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])\.([01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])\.([01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])\.([01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])' |
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ip=$(curl -s -4 https://cloudflare.com/cdn-cgi/trace | grep -E '^ip'); ret=$? |
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if [[ ! $ret == 0 ]]; then # In the case that cloudflare failed to return an ip. |
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# Attempt to get the ip from other websites. |
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ip=$(curl -s https://api.ipify.org || curl -s https://ipv4.icanhazip.com) |
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else |
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# Extract just the ip from the ip line from cloudflare. |
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ip=$(echo $ip | sed -E "s/^ip=($ipv4_regex)$/\1/") |
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fi |
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if [[ $discorduri != "" ]]; then |
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curl -i -H "Accept: application/json" -H "Content-Type:application/json" -X POST \ |
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--data-raw '{ |
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"content" : "'"$sitename"' DDNS Update Failed: '$record_name': '$record_identifier' ('$ip')." |
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}' $discorduri |
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# Use regex to check for proper IPv4 format. |
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if [[ ! $ip =~ ^$ipv4_regex$ ]]; then |
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logger -s "DDNS Updater: Failed to find a valid IP." |
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exit 2 |
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fi |
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exit 1;; |
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*) |
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logger "DDNS Updater: $ip $record_name DDNS updated." |
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if [[ $slackuri != "" ]]; then |
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curl -L -X POST $slackuri \ |
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--data-raw '{ |
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"channel": "'$slackchannel'", |
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"text" : "'"$sitename"' Updated: '$record_name''"'"'s'""' new IP Address is '$ip'" |
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}' |
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} |
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set_auth_headers(){ |
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if [[ "${auth_method}" == "global" ]]; then |
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auth_header="X-Auth-Key:" |
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else |
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auth_header="Authorization: Bearer" |
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fi |
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if [[ $discorduri != "" ]]; then |
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curl -i -H "Accept: application/json" -H "Content-Type:application/json" -X POST \ |
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--data-raw '{ |
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"content" : "'"$sitename"' Updated: '$record_name''"'"'s'""' new IP Address is '$ip'" |
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}' $discorduri |
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} |
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check_if_a_record_exists(){ |
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logger "DDNS Updater: Check Initiated" |
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record=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/$zone_identifier/dns_records?type=A&name=$record_name" \ |
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-H "X-Auth-Email: $auth_email" \ |
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-H "$auth_header $auth_key" \ |
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-H "Content-Type: application/json") |
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if [[ $record == *"\"count\":0"* ]]; then |
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logger -s "DDNS Updater: Record does not exist, perhaps create one first? (${ip} for ${record_name})" |
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exit 1 |
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fi |
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exit 0;; |
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esac |
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} |
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get_current_ip_from_cloudflare(){ |
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old_ip=$(echo "$record" | sed -E 's/.*"content":"(([0-9]{1,3}\.){3}[0-9]{1,3})".*/\1/') |
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# Compare if they're the same |
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if [[ $ip == $old_ip ]]; then |
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logger "DDNS Updater: IP ($ip) for ${record_name} has not changed." |
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exit 0 |
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fi |
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} |
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update_ip_on_cloudflare(){ |
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record_identifier=$(echo "$record" | sed -E 's/.*"id":"([A-Za-z0-9_]+)".*/\1/') |
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update=$(curl -s -X PATCH "https://api.cloudflare.com/client/v4/zones/$zone_identifier/dns_records/$record_identifier" \ |
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-H "X-Auth-Email: $auth_email" \ |
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-H "$auth_header $auth_key" \ |
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-H "Content-Type: application/json" \ |
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--data "{\"type\":\"A\",\"name\":\"$record_name\",\"content\":\"$ip\",\"ttl\":\"$ttl\",\"proxied\":${proxy}}") |
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} |
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send_webhooks(){ |
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case "$update" in |
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*"\"success\":false"*) |
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echo -e "DDNS Updater: $ip $record_name DDNS failed for $record_identifier ($ip). DUMPING RESULTS:\n$update" | logger -s |
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if [[ $slackuri != "" ]]; then |
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curl -L -X POST $slackuri \ |
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--data-raw '{ |
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"channel": "'$slackchannel'", |
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"text" : "'"$sitename"' DDNS Update Failed: '$record_name': '$record_identifier' ('$ip')." |
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}' |
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fi |
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if [[ $discorduri != "" ]]; then |
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curl -i -H "Accept: application/json" -H "Content-Type:application/json" -X POST \ |
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--data-raw '{ |
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"content" : "'"$sitename"' DDNS Update Failed: '$record_name': '$record_identifier' ('$ip')." |
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}' $discorduri |
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fi |
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exit 1;; |
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*) |
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logger "DDNS Updater: $ip $record_name DDNS updated." |
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if [[ $slackuri != "" ]]; then |
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curl -L -X POST $slackuri \ |
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--data-raw '{ |
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"channel": "'$slackchannel'", |
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"text" : "'"$sitename"' Updated: '$record_name''"'"'s'""' new IP Address is '$ip'" |
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}' |
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fi |
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if [[ $discorduri != "" ]]; then |
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curl -i -H "Accept: application/json" -H "Content-Type:application/json" -X POST \ |
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--data-raw '{ |
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"content" : "'"$sitename"' Updated: '$record_name''"'"'s'""' new IP Address is '$ip'" |
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}' $discorduri |
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fi |
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exit 0;; |
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esac |
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} |
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main(){ |
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validate_variables |
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check_ipv4_is_available |
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set_auth_headers |
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check_if_a_record_exists |
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get_current_ip_from_cloudflare |
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update_ip_on_cloudflare |
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send_webhooks |
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} |
Rui Coelho
1 year ago