Intel Extensible Firmware Interface - Manual (Page 935)

32/64-Bit UNDI Specification
Version 1.10 12/01/02 E-69
E.4.12 Station Address
This command is used to get current station and broadcast MAC addresses and, if supported, to
change the current station MAC address.
E.4.12.1 Issuing the Command
To issue a Station Address command, create a CDB and fill it in as shows in the table below:
CDB Field How to initialize the CDB structure for a Station Address command
OpCode PXE_OPCODE_STATION_ADDRESS
OpFlags Set as needed.
CPBsize sizeof(PXE_CPB_STATION_ADDRESS)
DBsize sizeof(PXE_DB_STATION_ADDRESS)
CPBaddr Address of PXE_CPB_STATION_ADDRESS structure.
DBaddr Address of PXE_DB_STATION_ADDRESS structure.
StatCode PXE_STATCODE_INITIALIZE
StatFlags PXE_STATFLAGS_INITIALIZE
IFnum A valid interface number from zero to !PXE.IFcnt .
Control Set as needed.
OpFlags
To read current station and broadcast MAC addresses set the OpFlags field to:
•
PXE_OPFLAGS_STATION_ADDRESS_READ
To change the current station to the address given in the CPB set the OpFlags field to:
•
PXE_OPFLAGS_STATION_ADDRESS_WRITE
To reset the current station address back to the power on default, set the OpFlags field to:
•
PXE_OPFLAGS_STATION_ADDRESS_RESET
Preparing the CPB
To change the current station MAC address the CDB.CPBsize and CDB.CPBaddr fields must
be set.
typedef struct s_pxe_cpb_station_address {
// If supplied and supported, the current station MAC address
// will be changed.
PXE_MAC_ADDR StationAddr;
} PXE_CPB_STATION_ADDRESS;