Function send

Arduino/libraries/Ethernet2/src/utility/socket.cpp:102–143

* @brief This function used to send the data in TCP mode * @return 1 for success else 0. */

 * @return	1 for success else 0.
 */
uint16_t send(SOCKET s, const uint8_t * buf, uint16_t len)
{
  uint8_t status=0;
  uint16_t ret=0;
  uint16_t freesize=0;

  if (len > w5500.SSIZE) 
    ret = w5500.SSIZE; // check size not to exceed MAX size.
  else 
    ret = len;

  // if freebuf is available, start.
  do 
  {
    freesize = w5500.getTXFreeSize(s);
    status = w5500.readSnSR(s);
    if ((status != SnSR::ESTABLISHED) && (status != SnSR::CLOSE_WAIT))
    {
      ret = 0; 
      break;
    }
  } 
  while (freesize < ret);

  // copy data
  w5500.send_data_processing(s, (uint8_t *)buf, ret);
  w5500.execCmdSn(s, Sock_SEND);

  /* +2008.01 bj */
  while ( (w5500.readSnIR(s) & SnIR::SEND_OK) != SnIR::SEND_OK ) 
  {
    /* m2008.01 [bj] : reduce code */
    if ( w5500.readSnSR(s) == SnSR::CLOSED )
    {
      close(s);
      return 0;
    }
  }
  /* +2008.01 bj */
  w5500.writeSnIR(s, SnIR::SEND_OK);
  return ret;
}


/**