Method: IPAdmin.arpa

Defined in:
lib/ip_admin.rb

.arpa(object) ⇒ Object

Using the provided IPAdmin::CIDR object, return either an in-addr.arpa. or ip6.arpa. string. The netmask will be used to determine the length of the returned arpa string.

  • Arguments:

    • IPAdmin::CIDR object

  • Returns:

    • IP address in in-addr.arpa or ip6.arpa format

Note:

IPAdmin.arpa will use the original IP address passed during the initialization
of the CIDR objects. This IP can be found using the CIDR.ip() method.

Example:

arpa = IPAdmin.arpa(cidr)



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# File 'lib/ip_admin.rb', line 30

def arpa(object)

    unless (object.kind_of? IPAdmin::CIDR)
        raise ArgumentError, "Expected IPAdmin::CIDR object, " +
                             "but #{object.class} provided."
    end

    base = object.ip()
    netmask = object.bits()

    if (object.version == 4)
        net = base.split('.')

        if (netmask)
            while (netmask < 32)
                net.pop
                netmask = netmask + 8
            end
        end

        arpa = net.reverse.join('.')
        arpa << ".in-addr.arpa."

    elsif (object.version == 6)
        fields = base.split(':')
        net = []
        fields.each do |field|
            (field.split("")).each do |x|
                net.push(x)
            end
        end

        if (netmask)
            while (netmask < 128)
                net.pop
                netmask = netmask + 4
            end
        end

        arpa = net.reverse.join('.')
        arpa << ".ip6.arpa."

    end

    return(arpa)
end