Intel Extensible Firmware Interface - Manual (Page 660)

Extensible Firmware Interface Specification
15-54 12/01/02 Version 1.10
EFI_PXE_BASE_CODE.UdpWrite()
Summary
Writes a UDP packet to the network interface.
Prototype
EFI_STATUS
(EFIAPI *EFI_PXE_BASE_CODE_UDP_WRITE) (
IN EFI_PXE_BASE_CODE *This,
IN UINT16 OpFlags,
IN EFI_IP_ADDRESS *DestIp,
IN EFI_PXE_BASE_CODE_UDP_PORT *DestPort,
IN EFI_IP_ADDRESS *GatewayIp, OPTIONAL
IN EFI_IP_ADDRESS *SrcIp, OPTIONAL
IN OUT EFI_PXE_BASE_CODE_UDP_PORT *SrcPort, OPTIONAL
IN UINTN *HeaderSize, OPTIONAL
IN VOID *HeaderPtr, OPTIONAL
IN UINTN *BufferSize,
IN VOID *BufferPtr
);
Parameters
This Pointer to the EFI_PXE_BASE_CODE instance.
OpFlags The UDP operation flags. If MAY_FRAGMENT is set, then if required,
this UDP write operation may be broken up across multiple packets.
DestIp The destination IP address.
DestPort The destination UDP port number.
GatewayIp The gateway IP address. If DestIp is not in the same subnet as
StationIp , then this gateway IP address will be used. If this field is
NULL , and the DestIp is not in the same subnet as StationIp , then
the RouteTable will be used.
SrcIp The source IP address. If this field is NULL , then StationIp will be
used as the source IP address.
SrcPort The source UDP port number. If OpFlags has ANY_SRC_PORT set
or SrcPort is NULL , then a source UDP port will be automatically
selected. If a source UDP port was automatically selected, and
SrcPort is not NULL , then it will be returned in SrcPort .
HeaderSize An optional field which may be set to the length of a header at
HeaderPtr to be prepended to the data at BufferPtr .