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155 lines
6.0 KiB
155 lines
6.0 KiB
#!/bin/bash
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## change to "bin/sh" when necessary
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############## CLOUDFLARE CREDENTIALS ##############
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# @auth_email - The email used to login 'https://dash.cloudflare.com'
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# @auth_method - Set to "global" for Global API Key or "token" for Scoped API Token
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# @auth_key - Your API Token or Global API Key
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# @zone_identifier - Can be found in the "Overview" tab of your domain
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# -------------------------------------------------- #
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auth_email=""
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auth_method="token"
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auth_key=""
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zone_identifier=""
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############# DNS RECORD CONFIGURATION #############
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# @record_name - Which record you want to be synced
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# @ttl - DNS TTL (seconds), can be set between (30 if enterprise) 60 and 86400 seconds, or 1 for Automatic
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# @proxy - Set the proxy to true or false
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# -------------------------------------------------- #
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record_name=""
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ttl="3600"
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proxy="false"
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############### SCRIPT CONFIGURATION ###############
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# @log_header_name - Header name used for logs
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# -------------------------------------------------- #
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log_header_name="DDNS Updater"
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############# WEBHOOKS CONFIGURATION ###############
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# @sitename - Title of site "Example Site"
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# @slackchannel - Slack Channel #example
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# @slackuri - URI for Slack WebHook "https://hooks.slack.com/services/xxxxx"
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# @discorduri - URI for Discord WebHook "https://discordapp.com/api/webhooks/xxxxx"
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# -------------------------------------------------- #
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sitename=""
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slackchannel=""
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slackuri=""
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discorduri=""
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################################################
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## Make sure we have a valid IPv4 connection
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################################################
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if ! { curl -4 -s --head --fail https://ipv4.google.com >/dev/null; }; then
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logger -s "$log_header_name: Unable to establish a valid IPv4 connection to a known host."
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exit 1
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fi
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################################################
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## Finding our IPv4 address
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################################################
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ip=$(curl -s -4 https://api.ipify.org || curl -s -4 https://ipv4.icanhazip.com)
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# Check point: Make sure the collected IPv4 address is valid
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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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if [[ ! $ip =~ ^$ipv4_regex$ ]]; then
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logger -s "$log_header_name: Failed to find a valid IPv4 address."
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exit 1
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fi
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################################################
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## Check and set the proper auth header
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################################################
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if [[ "${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 "$log_header_name: Check Initiated"
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record=$(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 [[ $record == *"\"count\":0"* ]]; then
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logger -s "$log_header_name: 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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# Make sure the extracted IPv4 address is valid
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if [[ ! $old_ip =~ ^$ipv4_regex$ ]]; then
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logger -s "$log_header_name: Unable to extract existing IPv4 address from DNS record."
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exit 1
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fi
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# Compare if they're the same
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if [[ $ip == $old_ip ]]; then
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logger "$log_header_name: 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 $auth_key" \
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-H "Content-Type: application/json" \
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--data "{\"content\":\"$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 "$update" in
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*"\"success\":false"*)
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echo -e "$log_header_name: $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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}" $discorduri
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fi
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exit 1
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;;
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*)
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logger "$log_header_name: $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 IPv4 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 IPv4 Address is $ip\"
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}" $discorduri
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fi
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exit 0
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;;
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esac
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