# DNSZi update script v1.1
# http://www.mizniz.net/44

:local userId "myUserId";
:local authCode "myAuthCode";
:local hosts "mydomain1.com,mydomain2.com";
:local gatewayInterface "ether1-gateway";
:local secureUpdate no;
:local saveResult yes;

:global previousIpAddress;

:if ([/interface find where name=$gatewayInterface running=yes] != "") do={
# Get the current IP on the interface
    :local currentIpAddress [/ip address get [find interface="$gatewayInterface" disabled=no] address];
# Strip the net mask off the IP address
    :for i from=( [:len $currentIpAddress] - 1) to=0 do={
        :if ( [:pick $currentIpAddress $i] = "/") do={ 
            :set currentIpAddress [:pick $currentIpAddress 0 $i];
        } 
    }

    :if ($currentIpAddress != $previousIpAddress) do={
        :log info "ddns: Current ip address ($currentIpAddress) is not equal to previous ip address, update needed";
        :set previousIpAddress $currentIpAddress;
		
        :local urlScheme "http";
        :if ($secureUpdate) do={
            :set urlScheme "https";
        }
        
        :foreach host in=[:toarray $hosts] do={
# The update URL. Note the "\3F" is hex for question mark (?). Required since ? is a special character in commands.
            /tool fetch url="$urlScheme://ddns.dnszi.com/set.html\3Fuser=$userId&auth=$authCode&domain=$host&record=" keep-result=$saveResult;
        }
        :log info "ddns: Hosts updated on DNSZi with ip address ($currentIpAddress).";
    }
} else={
    :log error "ddns: Interface ($gatewayInterface) is invalid or not currently running.";
}