Intel Extensible Firmware Interface - Manual (Page 642)

Extensible Firmware Interface Specification
15-36 12/01/02 Version 1.10
//*******************************************************
// EFI_MAC_ADDRESS
//*******************************************************
typedef struct {
UINT8 Addr[32];
} EFI_MAC_ADDRESS;
DHCP Packet Data Types
This section defines the data types for DHCP packets, ICMP error packets, and TFTP error packets.
All of these are byte-packed data structures.
NOTE
All the multibyte fields in these structures are stored in network order.
//*******************************************************
// EFI_PXE_BASE_CODE_DHCPV4_PACKET
//*******************************************************
typedef struct {
UINT8 BootpOpcode;
UINT8 BootpHwType;
UINT8 BootpHwAddrLen;
UINT8 BootpGateHops;
UINT32 BootpIdent;
UINT16 BootpSeconds;
UINT16 BootpFlags;
UINT8 BootpCiAddr[4];
UINT8 BootpYiAddr[4];
UINT8 BootpSiAddr[4];
UINT8 BootpGiAddr[4];
UINT8 BootpHwAddr[16];
UINT8 BootpSrvName[64];
UINT8 BootpBootFile[128];
UINT32 DhcpMagik;
UINT8 DhcpOptions[56];
} EFI_PXE_BASE_CODE_DHCPV4_PACKET;
// TBD in EFI v1.1
// typedef struct {
// } EFI_PXE_BASE_CODE_DHCPV6_PACKET;