Function igmpsend

Arduino/libraries/Ethernet2/src/utility/socket.cpp:326–356

}

uint16_t igmpsend(SOCKET s, const uint8_t * buf, uint16_t len)
{
  uint8_t status=0;
  uint16_t ret=0;

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

  if (ret == 0)
    return 0;

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

  while ( (w5500.readSnIR(s) & SnIR::SEND_OK) != SnIR::SEND_OK ) 
  {
    status = w5500.readSnSR(s);
    if (w5500.readSnIR(s) & SnIR::TIMEOUT)
    {
      /* in case of igmp, if send fails, then socket closed */
      /* if you want change, remove this code. */
      close(s);
      return 0;
    }
  }

  w5500.writeSnIR(s, SnIR::SEND_OK);
  return ret;
}

uint16_t bufferData(SOCKET s, uint16_t offset, const uint8_t* buf, uint16_t len)
{