return nil, err
	}
	return conn, nil
}

// Dial connects to the given network address using net.Dial
// and then initiates a TLS handshake, returning the resulting
// TLS connection.
// Dial interprets a nil configuration as equivalent to
// the zero configuration; see the documentation of Config
// for the defaults.
func Dial(network, addr string, config *Config) (*Conn, error) {

				w.Header().Set("X-Status", "ok")
			})).ts

			var writeNumAtomic int32
			c := ts.Client()
			c.Transport.(*Transport).Dial = func(network, addr string) (net.Conn, error) {
				logf("Dial")
				c, err := net.Dial(network, ts.Listener.Addr().String())
				if err != nil {
					logf("Dial error: %v", err)
					return nil, err
				}
				return &writerFuncConn{
					Conn: c,

	// Dial specifies the dial function for creating unencrypted TCP connections.
	//
	// Dial runs concurrently with calls to RoundTrip.
	// A RoundTrip call that initiates a dial may end up using
	// a connection dialed previously when the earlier connection
	// becomes idle before the later Dial completes.
	//

func (f *FakeDiscoveryServer) ConnectADS() *xds.AdsTest {
	conn, err := grpc.Dial("buffcon",
		grpc.WithTransportCredentials(insecure.NewCredentials()),
		grpc.WithBlock(),
		grpc.WithContextDialer(func(context.Context, string) (net.Conn, error) {
			return f.BufListener.Dial()
		}))
	if err != nil {
		f.t.Fatalf("failed to connect: %v", err)
	}
	return xds.NewAdsTest(f.t, conn)
}

			string(got), err, expected)
	}

	// Slow client that should timeout.
	t1 := time.Now()
	conn, err := net.Dial("tcp", ts.Listener.Addr().String())
	if err != nil {
		return fmt.Errorf("Dial: %v", err)
	}
	buf := make([]byte, 1)
	n, err := conn.Read(buf)
	conn.Close()
	latency := time.Since(t1)
	if n != 0 || err != io.EOF {

	q.Enqueue(types.UID("foo4"), 1*time.Minute)
	expected := []types.UID{types.UID("foo1"), types.UID("foo2")}
	compareResults(t, expected, q.GetWork())
	compareResults(t, []types.UID{}, q.GetWork())
	// Dial the time to 1 hour ahead.
	clock.Step(time.Hour)
	expected = []types.UID{types.UID("foo3"), types.UID("foo4")}
	compareResults(t, expected, q.GetWork())
	compareResults(t, []types.UID{}, q.GetWork())
}

			if err != nil {
				log.Fatalf("parse ech-config-list err: %s", err)
			}
			cfg.EncryptedClientHelloConfigList = echConfigList
		}

		conn, err := net.Dial("tcp", net.JoinHostPort("localhost", *port))
		if err != nil {
			log.Fatalf("dial err: %s", err)
		}
		defer conn.Close()

		// Write the shim ID we were passed as a little endian uint64
		shimIDBytes := make([]byte, 8)

func SupportsRawSocket() bool {
	stackOnce.Do(probeStack)
	return rawSocketSess
}

// TestableNetwork reports whether network is testable on the current
// platform configuration.
//
// See func Dial of the standard library for the supported networks.
func TestableNetwork(network string) bool {
	ss := strings.Split(network, ":")
	switch ss[0] {
	case "ip+nopriv":
		// This is an internal network name for testing on the

					continue nextTest
				}
				t.Fatalf("Test %d: error: expected = <nil>, got = %v", i+1, err)
			}
		}

		for _, serverAddr := range listener.Addrs() {
			conn, err := net.Dial("tcp", serverAddr.String())
			if err != nil {
				t.Fatalf("Test %d: error: expected = <nil>, got = %v", i+1, err)
			}
			conn.Close()
		}

		listener.Close()
	}
}

			// No connection to local.
			continue
		}
		m.targets[host] = newConnection(connectionParams{
			ctx:           ctx,
			id:            m.ID,
			local:         o.Local,
			remote:        host,
			dial:          o.Dialer,
			handlers:      &m.handlers,
			auth:          o.AddAuth,
			blockConnect:  o.BlockConnect,
			tlsConfig:     o.TLSConfig,
			publisher:     o.TraceTo,
			incomingBytes: o.Incoming,