Sir How to call the cmd_zb_match_desc() function inside the switch case ?

Question

 static void cmd_zb_match_desc(nrf_cli_t const * p_cli)
{

   NRF_LOG_INFO("WELCOME");

    zb_zdo_match_desc_param_t * p_req;
    zdo_tsn_ctx_t             * p_tsn_cli;
    zb_buf_t                  * p_buf;
    uint16_t                  * p_cluster_list = NULL;
    uint8_t                     len = sizeof(p_req->cluster_list);
    zb_ret_t                    zb_err_code;
    zb_bool_t                   use_timeout = ZB_FALSE;
    zb_uint16_t                 timeout = ZIGBEE_CLI_MATCH_DESC_RESP_TIMEOUT;
    int                         timeout_offset;
    zb_uint16_t                 temp;
    int count=6;
    
      char int_array[]={"0xfffd","0xfffd","0xc05","1","0","0"};
     
    // We use p_cluster_list for calls to ZBOSS API but we're not using
    // p_cluster_list value in any way.
    UNUSED_VARIABLE(p_cluster_list);

    /*if ((count == 1) || (nrf_cli_help_requested(p_cli)))
    {
        print_usage(p_cli, int_array[0],
                    "<h:16-bit destination address>\r\n"
                    "<h:requested address/type> <h:profile ID>\r\n"
                    "<d:number of input clusters> [<h:input cluster IDs> ...]\r\n"
                    "<d:number of output clusters> [<h:output cluster IDs> ...]\r\n"
                    "[--timeout d:number of seconds to wait for answers]\r\n");
        return;
    }*/




    if (!strcmp(int_array[1], "-t") || !strcmp(int_array[1], "--timeout"))
    {
        print_error(p_cli, "Place option 'timeout' at the end of input parameters");
        return;
    }

    if (count < 6)
    {
        print_error(p_cli, "Incorrect number of arguments");
        return;
    }

    p_buf = ZB_GET_OUT_BUF();

    if (!p_buf)
    {
        print_error(p_cli, "Failed to execute command (buf alloc failed)");
        return;
    }


    ZB_BUF_INITIAL_ALLOC(p_buf, sizeof(*p_req), p_req);

    if (!parse_hex_u16(0xfd, &temp))
    {
        print_error(p_cli, "Incorrect network address");
        goto error;
    }


    if (!parse_hex_u16(int_array[1], &temp))
    {
        print_error(p_cli, "Incorrect address of interest");
        goto error;
    }
     //zb_uint16_t value=0xfffd;
   // p_req->value = temp;

    p_req->addr_of_interest = temp;

    if (!parse_hex_u16(int_array[3], &temp))
    {
        print_error(p_cli, "Incorrect profile id");
      
        goto error;
    }
    p_req->profile_id = temp;

    
    if (!parse_hex_u16(int_array[4], &temp))
    {
        print_error(p_cli, "Incorrect num_in_clusters");
      
        goto error;
    }
    p_req->num_in_clusters = temp;

    
    if (!parse_hex_u16(int_array[5], &temp))
    {
        print_error(p_cli, "Incorrect num_out_clusters");
      
        goto error;
    }
    p_req->num_out_clusters = temp;


  error:
    if (p_tsn_cli != NULL)
    {
        invalidate_ctx(p_tsn_cli);
    }
 

    p_tsn_cli->p_cli = p_cli;
    p_tsn_cli->is_broadcast = ZB_NWK_IS_ADDRESS_BROADCAST(p_req->nwk_addr);
    nrf_cli_fprintf(p_cli, NRF_CLI_NORMAL, "Sending %s request.\r\n", p_tsn_cli->is_broadcast ? "broadcast" : "unicast");
    p_tsn_cli->tsn   = zb_zdo_match_desc_req(ZB_REF_FROM_BUF(p_buf),
                                             cmd_zb_match_desc_cb);

    if (p_tsn_cli->tsn == ZB_ZDO_INVALID_TSN)
    {
        print_error(p_cli, "Failed to send match descriptor request");
        goto error;
    }

}


static void buttons_handler(bsp_event_t evt)
{
    zb_ret_t   zb_err_code;
    zb_int32_t button;
    nrf_cli_t  * p_cli;

    switch(evt)
    {
        case BSP_EVENT_KEY_0:
            button = LIGHT_SWITCH_BUTTON_ON;
            break;

        case BSP_EVENT_KEY_1:
            button = LIGHT_SWITCH_BUTTON_OFF;
            break;

        case BSP_EVENT_KEY_2:
         // cmd_zb_match_desc(p_cli);
            cycle_endpoint(ZB_TRUE);
            return;

        case BSP_EVENT_KEY_3:
            cmd_zb_match_desc(p_cli);


            // toggle_find_n_bind();
           return;

#ifdef ARDUINO_JOYSTICK_SHIELD_V1A
        case BSP_EVENT_KEY_4:
            cycle_endpoint(ZB_FALSE);
            return;
#endif

        default:
            NRF_LOG_INFO("Unhandled BSP Event received: %d", evt);
            return;
    }

    if (!m_device_ctx.button.in_progress)
    {
        m_device_ctx.button.in_progress = ZB_TRUE;
        m_device_ctx.button.timestamp = ZB_TIMER_GET();

        zb_err_code = ZB_SCHEDULE_ALARM(light_switch_button_handler, button, LIGHT_SWITCH_BUTTON_SHORT_POLL_TMO);
        ZB_ERROR_CHECK(zb_err_code);
    }
}

Sir in the above code i have a cmd_zb_match_desc() but i am calling inside the switch case but after calling i didn't able going inside the finction

please give the Suggestion how to call this function?????

case BSP_EVENT_KEY_3:
cmd_zb_match_desc(p_cli);
return;