func (s *ProxyServer) platformSetup(ctx context.Context) error {
	// Preserve backward-compatibility with the old secondary IP behavior
	if s.PrimaryIPFamily == v1.IPv4Protocol {
		s.NodeIPs[v1.IPv6Protocol] = net.IPv6zero
	} else {
		s.NodeIPs[v1.IPv4Protocol] = net.IPv4zero
	}
	return nil
}

// platformCheckSupported is called immediately before creating the Proxier, to check

	npa := &NodePortAddresses{}

	// Filter CIDRs to correct family
	for _, str := range cidrStrings {
		if (family == v1.IPv4Protocol) == netutils.IsIPv4CIDRString(str) {
			npa.cidrStrings = append(npa.cidrStrings, str)
		}
	}
	if len(npa.cidrStrings) == 0 {
		if family == v1.IPv4Protocol {
			npa.cidrStrings = []string{IPv4ZeroCIDR}
		} else {
			npa.cidrStrings = []string{IPv6ZeroCIDR}
		}
	}

	// Now parse

	switch ipFamily {
	case netutils.IPv4:
		return v1.IPv4Protocol
	case netutils.IPv6:
		return v1.IPv6Protocol
	}

	return v1.IPFamilyUnknown
}

// OtherIPFamily returns the other ip family
func OtherIPFamily(ipFamily v1.IPFamily) v1.IPFamily {
	if ipFamily == v1.IPv6Protocol {
		return v1.IPv4Protocol
	}

	return v1.IPv6Protocol
}

}

// AddressType represents the type of address referred to by an endpoint.
// +enum
type AddressType string

const (
	// AddressTypeIPv4 represents an IPv4 Address.
	AddressTypeIPv4 = AddressType(v1.IPv4Protocol)

	// AddressTypeIPv6 represents an IPv6 Address.
	AddressTypeIPv6 = AddressType(v1.IPv6Protocol)

	// AddressTypeFQDN represents a FQDN.
	AddressTypeFQDN = AddressType("FQDN")
)