e := newExecutor()
	protocolMap := make(map[scheme.Instance]protocol)
	h := add(newHTTPProtocol(e))
	protocolMap[scheme.HTTP] = h
	protocolMap[scheme.HTTPS] = h
	protocolMap[scheme.DNS] = add(newDNSProtocol(e))
	protocolMap[scheme.GRPC] = add(newGRPCProtocol(e))
	protocolMap[scheme.WebSocket] = add(newWebsocketProtocol(e))
	protocolMap[scheme.TLS] = add(newTLSProtocol(e))
	protocolMap[scheme.XDS] = add(newXDSProtocol(e))

	"net/url"
	"strings"
	"time"

	"istio.io/istio/pkg/test/echo"
	"istio.io/istio/pkg/test/echo/proto"
)

var _ protocol = &dnsProtocol{}

type dnsProtocol struct {
	e *executor
}

func newDNSProtocol(e *executor) protocol {
	return &dnsProtocol{e: e}
}

func (c *dnsProtocol) ForwardEcho(ctx context.Context, cfg *Config) (*proto.ForwardEchoResponse, error) {
	return doForward(ctx, cfg, c.e, c.makeRequest)
}