IPv4ZeroCIDR = "0.0.0.0/0"

	// IPv6ZeroCIDR is the CIDR block for the whole IPv6 address space
	IPv6ZeroCIDR = "::/0"
)

// isValidEndpoint checks that the given host / port pair are valid endpoint
func isValidEndpoint(host string, port int) bool {
	return host != "" && port > 0
}

// IsZeroCIDR checks whether the input CIDR string is either
// the IPv4 or IPv6 zero CIDR