case SMB2_CHANGE_NOTIFY:
            c = "SMB2_CHANGE_NOTIFY";
            break;
        case SMB2_QUERY_INFO:
            c = "SMB2_QUERY_INFO";
            break;
        case SMB2_SET_INFO:
            c = "SMB2_SET_INFO";
            break;
        case SMB2_OPLOCK_BREAK:
            c = "SMB2_OPLOCK_BREAK";
            break;
        default:
            c = "UNKNOWN";
        }