NetworkStream.h

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// Copyright (c) FIRST and other WPILib contributors.
// Open Source Software; you can modify and/or share it under the terms of
// the WPILib BSD license file in the root directory of this project.
 
#ifndef WPINET_NETWORKSTREAM_H_
#define WPINET_NETWORKSTREAM_H_
 
#include <cstddef>
#include <string_view>
 
namespace wpi {
 
class NetworkStream {
 public:
  NetworkStream() = default;
  virtual ~NetworkStream() = default;
 
  enum Error {
    kConnectionClosed = 0,
    kConnectionReset = -1,
    kConnectionTimedOut = -2,
    kWouldBlock = -3
  };
 
  virtual size_t send(const char* buffer, size_t len, Error* err) = 0;
  virtual size_t receive(char* buffer, size_t len, Error* err,
                         int timeout = 0) = 0;
  virtual void close() = 0;
 
  virtual std::string_view getPeerIP() const = 0;
  virtual int getPeerPort() const = 0;
  virtual void setNoDelay() = 0;
 
  // returns false on failure
  virtual bool setBlocking(bool enabled) = 0;
  virtual int getNativeHandle() const = 0;
 
  NetworkStream(const NetworkStream&) = delete;
  NetworkStream& operator=(const NetworkStream&) = delete;
};
 
}  // namespace wpi
 
#endif  // WPINET_NETWORKSTREAM_H_