this.skipAll(timeout, timeUnit)
  } catch (_: IOException) {
    false
  }

internal fun Socket.peerName(): String {
  val address = remoteSocketAddress
  return if (address is InetSocketAddress) address.hostName else address.toString()
}

/**
 * Returns true if new reads and writes should be attempted on this.
 *
 * Unfortunately Java's networking APIs don't offer a good health check, so we go on our own by

 * practice. Typically HTTP applications use other mechanisms for user identification and
 * authentication.
 *
 * ### Host
 *
 * The host identifies the webserver that serves the URL's resource. It is either a hostname like
 * `square.com` or `localhost`, an IPv4 address like `192.168.0.1`, or an IPv6 address like `::1`.
 *
 * Usually a webserver is reachable with multiple identifiers: its IP addresses, registered

    assertThat(request.requestLine).isEqualTo("GET /foo HTTP/1.1")
    assertThat(request.headers[":scheme"]).isEqualTo(scheme)
    assertThat(request.headers[":authority"]).isEqualTo("${server.hostName}:${server.port}")
  }

  @ParameterizedTest
  @ArgumentsSource(ProtocolParamProvider::class)
  fun get204Response(
    protocol: Protocol,
    mockWebServer: MockWebServer,
  ) {

     *     represented as a combination of scheme, host and port. When empty, the origin is that of
     *     the `streamId`.
     * @param protocol an ALPN protocol, such as `h2`.
     * @param host an IP address or hostname.
     * @param port the IP port associated with the service.
     * @param maxAge time in seconds that this alternative is considered fresh.
     */
    fun alternateService(
      streamId: Int,

        val networkRequest = chain.request()
        assertThat(networkRequest.header("User-Agent")).isNotNull()
        assertThat(networkRequest.header("Host")).isEqualTo(
          server.hostName + ":" + server.port,
        )
        assertThat(networkRequest.header("Accept-Encoding")).isNotNull()

        // The network response also has everything, including the raw gzipped content.

    webServer.enqueue(
      MockResponse.Builder()
        .webSocketUpgrade(serverListener)
        .build(),
    )
    val request =
      Request.Builder()
        .url(scheme + "://" + webServer.hostName + ":" + webServer.port + "/")
        .build()
    val webSocket = newWebSocket(request)
    clientListener.assertOpen()
    val server = serverListener.assertOpen()
    webSocket.send("abc")

     * fallbacks to prevent the host machine's various IP addresses from interfering.
     */
    private val SINGLE_INET_ADDRESS_DNS =
      Dns { hostname ->
        val addresses = Dns.SYSTEM.lookup(hostname)
        listOf(addresses[0])
      }

    private operator fun Throwable?.plus(throwable: Throwable): Throwable {
      if (this != null) {
        addSuppressed(throwable)

      Dns { hostname ->
        val allAddresses = mutableListOf<InetAddress>()
        val allExceptions = mutableListOf<IOException>()
        val latch = CountDownLatch(asyncDns.size)

        asyncDns.forEach {
          it.query(
            hostname,
            object : Callback {
              override fun onResponse(
                hostname: String,
                addresses: List<InetAddress>,

      } else {
        System.err.println("No main for $className")
      }
    } catch (ite: InvocationTargetException) {
      if (!expectedFailure(className, ite.cause!!)) {
        throw ite.cause!!
      }
    }
  }

  @Suppress("UNUSED_PARAMETER")
  private fun expectedFailure(
    className: String,
    cause: Throwable,
  ): Boolean {
    return when (className) {

      ?.trustManager(sslSocketFactory)

  override fun configureTlsExtensions(
    sslSocket: SSLSocket,
    hostname: String?,
    protocols: List<Protocol>,
  ) {
    // No TLS extensions if the socket class is custom.
    socketAdapters.find { it.matchesSocket(sslSocket) }
      ?.configureTlsExtensions(sslSocket, hostname, protocols)
  }

  override fun getSelectedProtocol(sslSocket: SSLSocket): String? =