f := filepath.Join(t.TempDir(), "test")
	l, err := NewListener(f)
	if err != nil {
		t.Fatalf("unexpected error %v", err)
	}
	defer l.Close()
	conn, err := connect(f)
	if err != nil {
		t.Fatalf("failed to connect %v", err)
	}
	conn.Close()
}

func connect(socket string) (*grpc.ClientConn, error) {
	var opts []grpc.DialOption

      "version_info": "2024-03-04T08:37:44Z/4",
      "dynamic_listeners": [
        {
          "name": "connect_terminate",
          "active_state": {
            "listener": {
              "@type": "type.googleapis.com/envoy.config.listener.v3.Listener",
              "name": "connect_terminate",
              "address": {
                "socket_address": {
                  "address": "0.0.0.0",

	ztunnelKeepAliveCheckInterval = time.Second / 10
	mt := monitortest.New(t)
	setupLogging()
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	fixture := connect(ctx)
	ztunClient := fixture.ztunClient
	uid := fixture.uid

	m, fds := readRequest(t, ztunClient)
	// we got am essage from ztun, so it should have observed us being connected

      "static_clusters": [
        {
          "cluster": {
            "@type": "type.googleapis.com/envoy.config.cluster.v3.Cluster",
            "name": "agent",
            "type": "STATIC",
            "connect_timeout": "0.250s",
            "load_assignment": {
              "cluster_name": "agent",
              "endpoints": [
                {
                  "lb_endpoints": [
                    {

This is not really so much a new protocol, but rather a name we came up with to refer to the expectations of clients and servers communicating in the mesh.

HBONE is just a standard HTTP `CONNECT` tunnel, over mutual TLS with mesh (SPIFFE) certificates, on a well known port (15008).
The target destination address is set in the `:authority` header, and additional headers can be included as well.

          },
          "route": {
           "cluster": "outbound|8000||httpbin.default.svc.cluster.local",
           "timeout": "0s",
           "retry_policy": {
            "retry_on": "connect-failure,refused-stream,unavailable,cancelled,retriable-status-codes",
            "num_retries": 2,
            "retry_host_predicate": [
             {
              "name": "envoy.retry_host_predicates.previous_hosts",

	LogUDSAddress string

	// The watch server socket address that CNI plugin will forward CNI events to.
	CNIEventAddress string

	// The ztunnel server socket address that the ztunnel will connect to.
	ZtunnelUDSAddress string

	// Whether ambient is enabled
	AmbientEnabled bool

	// Whether ambient DNS capture is enabled
	AmbientDNSCapture bool

	// Whether ipv6 is enabled for ambient capture

                {
                 "match": {
                  "connect_matcher": {}
                 },
                 "route": {
                  "cluster": "main_internal",
                  "upgrade_configs": [
                   {
                    "upgrade_type": "CONNECT",
                    "connect_config": {}
                   }
                  ]
                 },

                      "cluster": "outbound|9080||productpage.default.svc.cluster.local",
                      "timeout": "0s",
                      "retry_policy": {
                        "retry_on": "connect-failure,refused-stream,unavailable,cancelled,retriable-status-codes",
                        "num_retries": 2,
                        "retry_host_predicate": [
                          {

                      "cluster": "outbound|9080||productpage.default.svc.cluster.local",
                      "timeout": "0s",
                      "retry_policy": {
                        "retry_on": "connect-failure,refused-stream,unavailable,cancelled,retriable-status-codes",
                        "num_retries": 2,
                        "retry_host_predicate": [
                          {