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92 lines
4.4 KiB
92 lines
4.4 KiB
#!/bin/bash
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## change to "bin/sh" when necessary
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auth_email="" # The email used to login 'https://dash.cloudflare.com'
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auth_method="token" # 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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record_names=() # Which records you want to be synced Format: ("domain.com" "mydomain.net")
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ttl="3600" # Set the DNS TTL (seconds)
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proxy="false" # Set the proxy to true or false
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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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## 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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echo "DDNS Updater: Failed to find a valid IP." | tee >(logger -s)
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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 [[ "${auth_method}" == "global" ]]; then
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auth_header="X-Auth-Key:"
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else
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auth_header="Authorization: Bearer"
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fi
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###########################################
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## Seek for the A record
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###########################################
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echo "DDNS Updater: Check Initiated" | tee >(logger)
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for record_name in "${record_names[@]}"; do
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echo "Updating IP for $record_name" | tee >(logger)
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record=$(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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echo "Response for $record_name: $record" | tee >(logger)
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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 [[ $record == *"\"count\":0"* ]]; then
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echo "DDNS Updater: Record does not exist, perhaps create one first? (${ip} for ${record_name})" | tee >(logger -s)
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exit 1
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fi
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###########################################
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## Get existing IP
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###########################################
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old_ip=$(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 != $old_ip ]]; then
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echo "DDNS Updater: IP ($ip) for ${record_name} has changed." | tee >(logger)
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###########################################
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## Set the record identifier from result
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###########################################
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record_identifier=$(echo "$record" | sed -E 's/.*"id":"(\w+)".*/\1/')
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###########################################
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## Change the IP@Cloudflare using the API
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###########################################
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update=$(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\":${proxy}}")
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else
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logger "DDNS Updater: IP ($ip) for ${record_name} has not changed."
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fi
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done
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