static void udp_callback(VMINT hdl, VMINT evt)
 {
     VMCHAR buf[1024] = {0};
     switch (evt)
     {
     case VM_UDP_EVENT_READ:
         {
             VMINT ret = 0;
             vm_soc_address_t recvfrom = {0};
             ret = vm_udp_receive(hdl, buf, 1024, &recvfrom);
         }break;
     default:
         {

         }break;
     }
 }