input Call, hasTLSInspector bool,
) (*listener.FilterChain, error) {
	chains = filter("DestinationPort", chains, func(fc *listener.FilterChainMatch) bool {
		return fc.GetDestinationPort() == nil
	}, func(fc *listener.FilterChainMatch) bool {
		return int(fc.GetDestinationPort().GetValue()) == input.Port
	})
	chains = filter("PrefixRanges", chains, func(fc *listener.FilterChainMatch) bool {
		return fc.GetPrefixRanges() == nil

	}

	// inspectors builds up a map of port -> required inspectors (TLS/HTTP)
	inspectors := map[int]enabledInspector{}
	for _, fc := range vi.FilterChains {
		port := fc.GetFilterChainMatch().GetDestinationPort().GetValue()
		needsTLS := fc.GetFilterChainMatch().GetTransportProtocol() == xdsfilters.TLSTransportProtocol
		needHTTP := false
		for _, ap := range fc.GetFilterChainMatch().GetApplicationProtocols() {