}

  @Throws(IOException::class)
  override fun createSocket(
    host: String,
    port: Int,
  ): Socket {
    val socket = delegate.createSocket(host, port)
    return configureSocket(socket)
  }

  @Throws(IOException::class)
  override fun createSocket(
    host: String,
    port: Int,
    localAddress: InetAddress,
    localPort: Int,
  ): Socket {

/**
 * A non-blocking interface to a web socket. Use the [factory][WebSocket.Factory] to create
 * instances; usually this is [OkHttpClient].
 *
 * ## Web Socket Lifecycle
 *
 * Upon normal operation each web socket progresses through a sequence of states:
 *
 *  * **Connecting:** the initial state of each web socket. Messages may be enqueued but they won't
 *    be transmitted until the web socket is open.
 *

  )

private fun requestUrl(
  socket: MockWebServerSocket,
  requestLine: RequestLine,
  headers: Headers,
): HttpUrl {
  val hostAndPort =
    headers[":authority"]
      ?: headers["Host"]
      ?: when (val inetAddress = socket.localAddress) {
        is Inet6Address -> "[${inetAddress.hostAddress}]:${socket.localPort}"
        else -> "${inetAddress.hostAddress}:${socket.localPort}"
      }

        socket?.closeQuietly()
      }
    }
  }

  private fun doSsl(socket: Socket): SSLSocket {
    val sslSocket =
      sslSocketFactory.createSocket(
        socket,
        socket.inetAddress.hostAddress,
        socket.port,
        true,
      ) as SSLSocket
    sslSocket.useClientMode = false
    Platform.get().configureTlsExtensions(sslSocket, null, listOf(Protocol.HTTP_2))
    sslSocket.startHandshake()

    val attempt1 = attempt0.nextConnectionSpec(connectionSpecs, socket)
    assertThat(attempt1).isNotNull()
    assertThat(attempt1!!.isTlsFallback).isTrue()
    socket.close()

    // COMPATIBLE_TLS is used here.
    socket = createSocketWithEnabledProtocols(*enabledSocketTlsVersions)
    connectionSpecs[attempt1.connectionSpecIndex].apply(socket, attempt1.isTlsFallback)

  }

  @Override public Socket createSocket(String host, int port) throws IOException {
    Socket result = createSocket();

    try {
      result.connect(new InetSocketAddress(host, port));
    } catch (IOException e) {
      result.close();
      throw e;
    }
    return result;
  }

  @Override public Socket createSocket(

			// with dead end because tcp-keepalive is not fired when there is data in the socket buffer.
			//    https://blog.cloudflare.com/when-tcp-sockets-refuse-to-die/
			// This is a sensitive configuration, it is better to set it to high values, > 60 secs since it can
			// affect clients reading data with a very slow pace  (disappropriate with socket buffer sizes)
			if opts.UserTimeout > 0 {

          object : DelegatingSocketFactory(getDefault()) {
            @Throws(IOException::class)
            override fun configureSocket(socket: Socket): Socket {
              socket.setSendBufferSize(SOCKET_BUFFER_SIZE)
              socket.setReceiveBufferSize(SOCKET_BUFFER_SIZE)
              return socket
            }
          },
        ).build()
  }

  @AfterEach
  fun tearDown() {

    applyConnectionSpec(connectionSpec, socket, false)
    assertArrayEquals(arrayOf("TLS_A", "TLS_C"), socket.enabledCipherSuites)
  }

  @Test
  fun applyIntersectionRetainsSslPrefixes() {
    val socket = FakeSslSocket()
    socket.enabledProtocols = arrayOf("TLSv1")
    socket.supportedCipherSuites =
      arrayOf("TLS_A", "TLS_B", "TLS_C", "TLS_D", "TLS_E")
    socket.enabledCipherSuites = arrayOf("TLS_A", "TLS_B", "TLS_C")

    assertThat(c1.socket().isClosed).isFalse()
    assertThat(c2.socket().isClosed).isFalse()

    // Add a third connection
    val c3 = factory.newConnection(pool, routeC1, 75L)

    // The third connection bounces the first.
    assertThat(pool.closeConnections(100L)).isEqualTo(0L)
    assertThat(pool.connectionCount()).isEqualTo(2)
    assertThat(c1.socket().isClosed).isTrue()