val InetSocketAddress.socketHost: String get() {
      // The InetSocketAddress was specified with a string (either a numeric IP or a host name). If
      // it is a name, all IPs for that name should be tried. If it is an IP address, only that IP
      // address should be tried.
      val address = address ?: return hostName

  }

  data class ConnectStart(
    override val timestampNs: Long,
    override val call: Call,
    val inetSocketAddress: InetSocketAddress,
    val proxy: Proxy?,
  ) : CallEvent()

  data class ConnectEnd(
    override val timestampNs: Long,
    override val call: Call,
    val inetSocketAddress: InetSocketAddress,
    val proxy: Proxy?,
    val protocol: Protocol?,
  ) : CallEvent() {

  }

  override fun connectEnd(
    call: Call,
    inetSocketAddress: InetSocketAddress,
    proxy: Proxy,
    protocol: Protocol?,
  ) {
    logWithTime("connectEnd: $protocol")
  }

  override fun connectFailed(
    call: Call,
    inetSocketAddress: InetSocketAddress,
    proxy: Proxy,
    protocol: Protocol?,
    ioe: IOException,
  ) {

    // Name proxy specification.
    var socketAddress = InetSocketAddress.createUnresolved("host", 1234)
    assertThat(socketAddress.socketHost).isEqualTo("host")
    socketAddress = InetSocketAddress.createUnresolved("127.0.0.1", 1234)
    assertThat(socketAddress.socketHost).isEqualTo("127.0.0.1")

    // InetAddress proxy specification.
    socketAddress = InetSocketAddress(InetAddress.getByName("localhost"), 1234)

    @Override
    public RdmaConnection createConnection(InetSocketAddress remote, InetSocketAddress local) throws IOException {
        ensureInitialized();
        return new DisniRdmaConnection(remote, local, endpointGroup);
    }

    @Override
    public RdmaConnection connect(String hostname, int port) throws IOException {
        InetSocketAddress remoteAddress = new InetSocketAddress(hostname, port);

  override fun connectEnd(
    call: Call,
    inetSocketAddress: InetSocketAddress,
    proxy: Proxy,
    protocol: Protocol?,
  ) = onEvent(ConnectEnd(System.nanoTime(), call, inetSocketAddress, proxy, protocol))

  override fun connectFailed(
    call: Call,
    inetSocketAddress: InetSocketAddress,
    proxy: Proxy,
    protocol: Protocol?,
    ioe: IOException,
  ) = onEvent(

        RdmaProvider provider = RdmaProviderFactory.selectBestProvider();

        // Use localhost for testing - should work with TCP fallback
        InetSocketAddress address = new InetSocketAddress("localhost", 12345);

        try (RdmaConnection connection = provider.createConnection(address, null)) {
            assertNotNull(connection, "Connection should not be null");

    override fun connectEnd(
      call: Call,
      inetSocketAddress: InetSocketAddress,
      proxy: Proxy,
      protocol: Protocol?,
    ) {
      for (delegate in eventListeners) {
        delegate.connectEnd(call, inetSocketAddress, proxy, protocol)
      }
    }

    override fun connectFailed(
      call: Call,
      inetSocketAddress: InetSocketAddress,
      proxy: Proxy,
      protocol: Protocol?,

     */
    Set<RdmaCapability> getSupportedCapabilities();
    
    /**
     * Create RDMA connection to remote endpoint
     */
    RdmaConnection createConnection(InetSocketAddress remote, 
                                   InetSocketAddress local) throws IOException;
    
    /**
     * Register memory region for RDMA operations
     */
    RdmaMemoryRegion registerMemory(ByteBuffer buffer, 

    }

    @Test
    public void testCreateConnection() throws Exception {
        InetSocketAddress remote = new InetSocketAddress("localhost", 445);
        InetSocketAddress local = null;

        RdmaConnection connection = provider.createConnection(remote, local);
        assertNotNull(connection, "Connection should not be null");