Intel Extensible Firmware Interface User Manual

Page 639

Protocols

— Network Support

Version 1.10

12/01/02

15-33

DhcpAckReceived

This field is initialized to

FALSE

by the

Start()

function and

set to

TRUE

when the

Dhcp()

function completes successfully.

When

TRUE

, the

DhcpAck

field is valid. This field can also be

changed by the

SetPackets()

function.

ProxyOfferReceived

This field is initialized to

FALSE

by the

Start()

function and

set to

TRUE

when the

Dhcp()

function completes successfully

and a proxy DHCP offer packet was received. When

TRUE

the

ProxyOffer

packet field is valid. This field can also be

changed by the

SetPackets()

function.

PxeDiscoverValid

When

TRUE

, the

PxeDiscover

packet field is valid. This

field is set to

FALSE

by the

Start()

and

Dhcp()

functions,

and can be set to

TRUE

FALSE

by the

Discover()

and

SetPackets()

functions.

PxeReplyReceived

When

TRUE,

the

PxeReply

packet field is valid. This field is

set to

FALSE

by the

Start()

and

Dhcp()

functions, and can

be set to

TRUE

FALSE

by the

Discover()

and

SetPackets()

functions.

PxeBisReplyReceived

When

TRUE

, the

PxeBisReply

packet field is valid. This

field is set to

FALSE

by the

Start()

and

Dhcp()

functions,

and can be set to

TRUE

FALSE

by the

Discover()

and

SetPackets()

functions.

IcmpErrorReceived

Indicates whether the

IcmpError

field has been updated. This

field is reset to

FALSE

by the

Start()

Dhcp()

Discover()

functions. If an ICMP error is received, this field will be

set to

TRUE

after the

IcmpError

field is updated.

TftpErrorReceived

Indicates whether the

TftpError

field has been updated. This

field is reset to

FALSE

by the

Start()

and

Mtftp()

functions. If a TFTP error is received, this field will be set to

TRUE

after the

TftpError

field is updated.

MakeCallbacks

When

FALSE

, callbacks will not be made. When

TRUE

, make

callbacks to the PXE Base Code Callback Protocol. This field is
reset to

FALSE

by the

Start()

function if the PXE Base Code

Callback Protocol is not available. It is reset to

TRUE

by the

Start()

function if the PXE Base Code Callback Protocol is

available.

TTL

The “time to live” field of the IP header. This field is initialized
to

DEFAULT_TTL

(See “Related Definitions”) by the

Start()

function and can be modified by the

SetParameters()

function.