Extensible Firmware Interface Specification
440 12/12/00 Version 1.02
Preparing the CPB
The receive filter CPB is used to change the contents multicast MAC address filter list. To leave
the multicast MAC address filter list unchanged, set the CDB.CPBsize field to
PXE_CPBSIZE_NOT_USED and CDB.CPBaddr to PXE_CPBADDR_NOT_USED.
To change the multicast MAC address filter list, set CDB.CPBsize to the size, in bytes, of the
multicast MAC address filter list and set CDB.CPBaddr to the address of the first entry in the
mutlicast MAC address filter list.
typedef struct s_pxe_cpb_receive_filters {
// List of multicast MAC addresses. This list, if present, will
// replace the existing multicast MAC address filter list.
PXE_MAC_ADDR MCastList[n];
} PXE_CPB_RECEIVE_FILTERS;
G.4.11.2 Waiting for the Command to Execute
Monitor the upper two bits (14 & 15) in the CDB.StatFlags field. Until these bits change to
report PXE_STATFLAGS_COMMAND_COMPLETE or PXE_STATFLAGS_COMMAND_FAILED,
the command has not been executed by the UNDI.
StatFlags Reason
COMMAND_COMPLETE Command completed successfully. Check StatFlags. DB is written.
COMMAND_FAILED Command failed. StatCode field contains error code.
COMMAND_QUEUED Command has been queued.
INITIALIZE Command has been not executed or queued.