docs: private SocketChannel accept() throws IOException
      {
          //  The situation where connection cannot be accepted due to insufficient
          //  resources is considered valid and treated by ignoring the connection.
          //  Accept one connection and deal with different failure modes.
          assert (fd != null);
  
          SocketChannel sock = fd.accept();
  
          if (!options.tcpAcceptFilters.isEmpty()) {
              boolean matched = false;
              for (TcpAddress.TcpAddressMask am : options.tcpAcceptFilters) {
                  if (am.matchAddress(address.address())) {
                      matched = true;
                      break;
                  }
              }
              if (!matched) {
                  try {
                      sock.close();
                  }
                  catch (IOException e) {
                  }
                  return null;
              }
          }
          if (options.tos != 0) {
              TcpUtils.setIpTypeOfService(sock, options.tos);
          }
          //  Set the socket buffer limits for the underlying socket.
          if (options.sndbuf != 0) {
              TcpUtils.setTcpSendBuffer(sock, options.sndbuf);
          }
          if (options.rcvbuf != 0) {
              TcpUtils.setTcpReceiveBuffer(sock, options.rcvbuf);
          }
  
          if (!isWindows) {
              TcpUtils.setReuseAddress(sock, true);
          }
  
          return sock;
      }