STRUCTURE /BIN_REC/
      INTEGER*4 VMS_DATETIME(2) ! quadword system timestamp
      BYTE      DESTADDR(0:5)   ! beginning of XEDRIVER P5 buffer: dest addr
      BYTE      SRCADDR(0:5)    ! source Ethernet address
      UNION
       MAP
        BYTE    PROTOCOL(0:1)   ! Ethernet protocol type
       END MAP
       MAP
        BYTE    DSAP            ! IEEE 802 destination SAP
        BYTE    SSAP            ! IEEE 802 source SAP
        UNION
         MAP
          BYTE  CTL(0:1)        ! IEEE 802 CTL byte(s)
         END MAP
         MAP
          BYTE  ECTL            ! IEEE extended 802 CTL byte
          BYTE  PID(0:4)        ! IEEE extended 802 Protocol IDentification
         END MAP
        END UNION
       END MAP
      END UNION                 ! end of XEDRIVER P5 buffer (20 bytes)
      INTEGER*2 LENGTH          ! length of message body
      BYTE      BODY(1500)      ! not all of this array may be sent; only
                                ! part actually used is written to file
    END STRUCTURE ! /BIN_REC/