text: /**
   * Copyright (c) 2018-present, Facebook, Inc.
   * All rights reserved.
   *
   * This source code is licensed under the BSD-style license found in the
   * LICENSE file in the root directory of this source tree. An additional grant
   * of patent rights can be found in the PATENTS file in the same directory.
   */
  #pragma once
  
  #include <datamover/ErrorCodes.h>
  #include <datamover/util/EncryptionUtils.h>
  #include <string>
  
  namespace datamover {
  
  class IClientSocket {
   public:
    virtual ~IClientSocket() {
    }
    /// tries to establish a connection with the server port
    virtual ErrorCode connect() = 0;
    /// @return   peer-ip of the connected socket
    virtual const std::string &getPeerIp() const = 0;
    /// tries to read nbyte data and periodically checks for abort
    virtual int read(char *buf, int nbyte, bool tryFull = true) = 0;
    /// tries to read nbyte data with a specific timeout and periodically checks
    /// for abort
    virtual int readWithTimeout(char *buf, int nbyte, int timeoutMs,
                                bool tryFull = true) = 0;
    /// tries to write nbyte data, if retry is true, socket tries to
    /// write as long as it makes some progress within a write timeout
    virtual int write(char *buf, int nbyte, bool retry = false) = 0;
  
    virtual ErrorCode shutdownWrites() = 0;
  
    virtual ErrorCode expectEndOfStream() = 0;
    /**
     * Normal closing of the current connection.
     */
    virtual ErrorCode closeConnection() = 0;
    /// Close unexpectedly. This api should be avoided.
    virtual void closeNoCheck() = 0;
    /// @return     current fd
    virtual int getFd() const = 0;
    /// @return     port
    virtual int getPort() const = 0;
    /// @return   number of unacked bytes in send buffer, returns -1 in case it
    ///           fails to get unacked bytes for this socket
    virtual int getUnackedBytes() const = 0;
    /// @return     current encryption type
    virtual EncryptionType getEncryptionType() const = 0;
    /// @return     possible non-retryable error
    virtual ErrorCode getNonRetryableErrCode() const = 0;
    /// @return     read error code
    virtual ErrorCode getReadErrCode() const = 0;
    /// @return     write error code
    virtual ErrorCode getWriteErrCode() const = 0;
  };
  }
  