Function network_flush

src/network.c:424–479

* \brief Clears any data in the read buffer of the socket * * \param rp Port data structure */

 * \param rp Port data structure
 */
void network_flush(hamlib_port_t *rp)
{
#ifdef __MINGW32__
    ULONG len;
#else
    uint len;
#endif

    char buffer[NET_BUFFER_SIZE] = { 0 };

    rig_debug(RIG_DEBUG_VERBOSE, "%s called\n", __func__);

    for (;;)
    {
        int ret;
        len = 0;
#ifdef __MINGW32__
        ret = ioctlsocket(rp->fd, FIONREAD, &len);
#else
        ret = ioctl(rp->fd, FIONREAD, &len);
#endif

        if (ret != 0)
        {
            rig_debug(RIG_DEBUG_ERR, "%s: ioctl err '%s'\n", __func__, strerror(errno));
            break;
        }

        if (len > 0)
        {
            int len_read = 0;
            rig_debug(RIG_DEBUG_WARN,
                      "%s: network data clear d: ret=%d, len=%d, '%s'\n",
                      __func__,
                      ret, (int)len, buffer);
            len_read = recv(rp->fd, buffer, len < NET_BUFFER_SIZE ? len : NET_BUFFER_SIZE,
                            0);

            if (len_read < 0)   // -1 indicates error occurred
            {
                rig_debug(RIG_DEBUG_ERR, "%s: read error '%s'\n", __func__, strerror(errno));
                break;
            }

            rig_debug(RIG_DEBUG_WARN,
                      "%s: network data cleared: ret=%d, len_read=%d/0x%x\n",
                      __func__,
                      ret, len_read, len_read);
            dump_hex((unsigned char *)buffer, len_read);
        }
        else
        {
            break;
        }
    }
}