Intel Extensible Firmware Interface - Manual (Page 903)

32/64-Bit UNDI Specification
Version 1.10 12/01/02 E-37
E.3.5.5 PXE_IP_ADDR
This storage type is always big endian (network order) not little endian (Intel order).
#pragma pack(1)
typedef union u_pxe_ip_addr {
PXE_IPV6 IPv6;
PXE_IPV4 IPv4;
} PXE_IP_ADDR;
#pragma pack()
E.3.5.6 PXE_DEVICE
This typedef is used to identify the network device that is being used by the UNDI. This
information is returned by the Get Config Info command.
#pragma pack(1)
typedef union pxe_device {
// PCI and PC Card NICs are both identified using bus, device
// and function numbers. For PC Card, this may require PC
// Card services to be loaded in the BIOS or preboot
// environment.
struct {
// See S/W UNDI ROMID structure definition for PCI and
// PCC BusType definitions.
PXE_UINT32 BusType;
// Bus, device & function numbers that locate this device.
PXE_UINT16 Bus;
PXE_UINT8 Device;
PXE_UINT8 Function;
} PCI, PCC;
} PXE_DEVICE;
#pragma pack()