void guac_rdpdr_process_receive()

in src/protocols/rdp/channels/rdpdr/rdpdr.c [36:123]

• 56 lines of code
• 12 McCabe index (conditional complexity)

void guac_rdpdr_process_receive(guac_rdp_common_svc* svc,
        wStream* input_stream) {

    int component;
    int packet_id;

    /* 
     * Check that device redirection stream contains at least 4 bytes
     * (UINT16 + UINT16).
     */
    if (Stream_GetRemainingLength(input_stream) < 4) {
        guac_client_log(svc->client, GUAC_LOG_WARNING, "Device redirection "
                "channel PDU header does not contain the expected number of "
                "bytes. Device redirection may not function as expected.");
        return;
    }
    
    /* Read header */
    Stream_Read_UINT16(input_stream, component);
    Stream_Read_UINT16(input_stream, packet_id);

    /* Core component */
    if (component == RDPDR_CTYP_CORE) {

        /* Dispatch handlers based on packet ID */
        switch (packet_id) {

            case PAKID_CORE_SERVER_ANNOUNCE:
                guac_rdpdr_process_server_announce(svc, input_stream);
                break;

            case PAKID_CORE_CLIENTID_CONFIRM:
                guac_rdpdr_process_clientid_confirm(svc, input_stream);
                break;

            case PAKID_CORE_DEVICE_REPLY:
                guac_rdpdr_process_device_reply(svc, input_stream);
                break;

            case PAKID_CORE_DEVICE_IOREQUEST:
                guac_rdpdr_process_device_iorequest(svc, input_stream);
                break;

            case PAKID_CORE_SERVER_CAPABILITY:
                guac_rdpdr_process_server_capability(svc, input_stream);
                break;

            case PAKID_CORE_USER_LOGGEDON:
                guac_rdpdr_process_user_loggedon(svc, input_stream);
                break;

            default:
                guac_client_log(svc->client, GUAC_LOG_DEBUG, "Ignoring "
                        "RDPDR core packet with unexpected ID: 0x%04x",
                        packet_id);

        }

    } /* end if core */

    /* Printer component */
    else if (component == RDPDR_CTYP_PRN) {

        /* Dispatch handlers based on packet ID */
        switch (packet_id) {

            case PAKID_PRN_CACHE_DATA:
                guac_rdpdr_process_prn_cache_data(svc, input_stream);
                break;

            case PAKID_PRN_USING_XPS:
                guac_rdpdr_process_prn_using_xps(svc, input_stream);
                break;

            default:
                guac_client_log(svc->client, GUAC_LOG_DEBUG, "Ignoring RDPDR "
                        "printer packet with unexpected ID: 0x%04x",
                        packet_id);

        }

    } /* end if printer */

    else
        guac_client_log(svc->client, GUAC_LOG_DEBUG, "Ignoring packet for "
                "unknown RDPDR component: 0x%04x", component);

}