}

  override fun createSocket(): Socket =
    object : Socket() {
      override fun connect(
        endpoint: SocketAddress?,
        timeout: Int,
      ) {
        val requested = (endpoint as InetSocketAddress)
        val inetSocketAddress = hostMapping[requested.address] ?: defaultAddress ?: requested
        Platform.get().log("Socket connection to: $inetSocketAddress was: $requested")

    ).filter { it.isSupported() }

  @Throws(IOException::class)
  override fun connectSocket(
    socket: Socket,
    address: InetSocketAddress,
    connectTimeout: Int,
  ) {
    try {
      socket.connect(address, connectTimeout)
    } catch (e: ClassCastException) {
      // On android 8.0, socket.connect throws a ClassCastException due to a bug
      // see https://issuetracker.google.com/issues/63649622

    private static final Logger log = LoggerFactory.getLogger(TcpRdmaConnection.class);

    private SocketChannel socketChannel;
    private Socket socket;

    /**
     * Create new TCP RDMA connection
     *
     * @param remote remote socket address
     * @param local local socket address, may be null
     */
    public TcpRdmaConnection(InetSocketAddress remote, InetSocketAddress local) {
        super(remote, local);
    }

      .build()

  class SocketClosingEventListener : EventListener() {
    var shouldClose: Boolean = false
    var lastSocket: Socket? = null

    override fun connectionAcquired(
      call: Call,
      connection: Connection,
    ) {
      lastSocket = connection.socket()
    }

    override fun requestHeadersStart(call: Call) {
      if (shouldClose) {
        lastSocket!!.close()
      }
    }
  }

    sequenceNumber: Int,
    socket: Socket,
    failure: IOException? = null,
  ) {
    this.requestLine = requestLine
    this.headers = headers
    this.chunkSizes = chunkSizes
    this.bodySize = bodySize
    this.body = body
    this.sequenceNumber = sequenceNumber
    this.failure = failure

    if (socket is SSLSocket) {
      try {
        this.handshake = socket.session.handshake()

We can't rely on application threads to read data from the socket. Application threads are transient: sometimes they're reading and writing and sometimes they're off doing application-layer things. But the socket is permanent, and it needs constant attention: we dispatch all incoming frames so the connection is good-to-go when the application layer needs it.

So we have a dedicated thread for every socket that just reads frames and dispatches them.

  override val route: Route,
  /** The low-level TCP socket. */
  private val rawSocket: JavaNetSocket,
  /**
   * The application layer socket. Either an [SSLSocket] layered over [rawSocket], or [rawSocket]
   * itself if this connection does not use SSL.
   */
  private val javaNetSocket: JavaNetSocket,
  private val handshake: Handshake?,
  private val protocol: Protocol,
  private val socket: BufferedSocket,

  override fun getSupportedCipherSuites(): Array<String> = delegate.supportedCipherSuites

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

  @Throws(IOException::class)

   * after the response and will close the connection when the client's socket is exhausted.
   *
   * On HTTP/1 this closes the socket.
   */
  public object ShutdownConnection : SocketEffect

  /**
   * On HTTP/2 this will send the error code on the stream.
   *
   * On HTTP/1 this closes the socket.
   */
  public class CloseStream(
    public val http2ErrorCode: Int = 0,
  ) : SocketEffect

             * because we might close the socket during a
             * request. However the chances are slim and the
             * retry code should ensure the overall request
             * is serviced. The alternative complicates things
             * more than I think is worth it.
             */

            if (socket != null) {
                socket.close();
                socket = null;
            }