Intel Extensible Firmware Interface, Specification

Page: 257 / 494

PXE Base Code Protocol
Version 1.02 12/12/00 239
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
or
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
or
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
or
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() , Mtftp() , UdpRead() , UdpWrite()
and
Arp()
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.
ToS
The type of service field of the IP header. This field is initialized
to
DEFAULT_ToS
(See "Related Definitions") by
Start()
,
and can be modified with the
SetParameters()
function.