text: /*
  The MIT License (MIT)
  
  Copyright (c) 2013-2015 SRS(ossrs)
  
  Permission is hereby granted, free of charge, to any person obtaining a copy of
  this software and associated documentation files (the "Software"), to deal in
  the Software without restriction, including without limitation the rights to
  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
  the Software, and to permit persons to whom the Software is furnished to do so,
  subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
  
  #ifndef SRS_APP_ST_HPP
  #define SRS_APP_ST_HPP
  
  /*
  #include <srs_app_st.hpp>
  */
  
  #include <srs_core.hpp>
  
  #include <st.h>
  
  #include <srs_app_st.hpp>
  #include <srs_rtmp_io.hpp>
  #include <string>
  //#define WRITE_ST_SOCKET_WRITE_DATA
  /**
   * the socket provides TCP socket over st,
   * that is, the sync socket mechanism.
   */
  class SrsStSocket : public ISrsProtocolReaderWriter
  {
  protected:
      int64_t recv_timeout;
      int64_t send_timeout;
      int64_t recv_bytes;
      int64_t send_bytes;
      st_netfd_t stfd;
  #ifdef WRITE_RTMP_DATA_ENABLE
      FILE*           precvfile;
      std::string     recvpath;
  #endif
  #ifdef WRITE_RTMP_DATA_FILE
  FILE*               psktdatafile;
  std::string         sktdatapath;
  #endif
  #ifdef WRITE_ST_SOCKET_WRITE_DATA
  FILE*               m_pwrite_file;
  #endif
  public:
      SrsStSocket(st_netfd_t client_stfd);
      virtual ~SrsStSocket();
  public:
      virtual bool is_never_timeout(int64_t timeout_us);
      virtual void set_recv_timeout(int64_t timeout_us);
      virtual int64_t get_recv_timeout();
      virtual void set_send_timeout(int64_t timeout_us);
      virtual int64_t get_send_timeout();
      virtual int64_t get_recv_bytes();
      virtual int64_t get_send_bytes();
      virtual int get_fd();
  
      virtual bool is_readable();
  public:
      /**
       * @param nread, the actual read bytes, ignore if NULL.
       */
      virtual int read(void* buf, size_t size, ssize_t* nread);
      virtual int read_fully(void* buf, size_t size, ssize_t* nread);
      /**
       * @param nwrite, the actual write bytes, ignore if NULL.
       */
      virtual int write(void* buf, size_t size, ssize_t* nwrite);
      virtual int writev(const iovec *iov, int iov_size, ssize_t* nwrite);
  };
  
  // initialize st, requires epoll.
  extern int srs_st_init();
  
  // close the netfd, and close the underlayer fd.
  // @remark when close, user must ensure io completed.
  extern void srs_close_stfd(st_netfd_t& stfd);
  
  #endif
  
  