;__________________________________________________________________________________________________
;
;	File:		ATBootEqu.a
;
;	Contains:	Equates for .ATBoot driver (network booting)
;
;	Written by:	Patrick Dyson
;
;	Copyright © 1989-1990 by Apple Computer, Inc.  All rights reserved.
;
;	Change History (most recent first):
;
;		 <6>	  3/9/90	PWD		Added offsets to driver globals for number of attempts and last
;									big error.
;		 <5>	 2/20/90	PWD		fixed equates for boot blocks as per comment in atbootequ.a
;		 <4>	 1/25/90	PWD		fixed equates for boot blocks.
;		 <3>	12/28/89	SWC		Fixed header and set tabs to 4.
;		 <2>	12/19/89	PWD		Adding to bbs
;	   <1.1>	12/12/89	PWD		Added support for self-authenticating images
;	   <1.0>	10/30/89	PWD		Adding to EASE
;__________________________________________________________________________________________________


BootDDPType			EQU		10						; our DDP type
BootSocket			EQU		10						; our static socket

minPktSize			EQU		6						; the minumum header size

BootStore			EQU		$B50					; lomem storage place
;
; Constants within the packet for a received block packet
;
packetVersion		EQU		1						; (byte) Protocol version number

rbNullCommand		EQU		0						; ignore this one
rbMapUser			EQU		1						; user record request
rbUserReply			EQU		2						; user record reply
rbImageRequest		EQU		3						; image request & bitmap
rbImageData			EQU		4						; image data
rbImageDone			EQU		5						; server done with current image
rbUserRecordUpdate	EQU		6						; new user info to server
rbUserRecordAck		EQU		7						; info received from server


;
; Offsets within the socket listener globals
;
bootImageID			EQU		0						; (word) our image ID (-1 if uninit)
machineID			EQU		bootImageID+2			; (word) our machine id
bitmapBase			EQU		machineID+2				; (long) bitmap buffer area
lastBlockNo			EQU		bitmapBase+4			; (word) last block we have space for
packetsReceived		EQU		lastBlockNo+2			; (word) image blocks received
imageBuffer			EQU		packetsReceived+2		; (long) image buffer area
blockSize			EQU		imageBuffer+4			; (word) data block size
trafficTimer		EQU		blockSize+2				; (long) ticks when last block in
progressTimer		EQU		trafficTimer+4			; (long) ticks when last NEW block in
retransThreshold	EQU		progressTimer+4			; (long) dynamic ticks between retrans
roundTrip			EQU		retransThreshold+4		; (word) packet roundtrip time
backOff				EQU		roundTrip+2				; (word) exponential backoff factor
lastRetransmission	EQU		backOff+2				; (long) time of last transmission
server_addr			EQU		lastRetransmission+4	; (long) server address...
tuple_table			EQU		server_addr+4			; (long) pointer to tuple table
readPacketArea		EQU		tuple_table+4			; (586 bytes) ddp read area
endOfGlobals		EQU		readPacketArea+586		; end of globals

SktLsnGSize			EQU		endOfGlobals			; globals size
;
; Offsets within a user record
;
; <pd 5> now padded to 586 bytes (maxddpsize)
URserverName		EQU		0						; server name...
URserverZone		EQU		URserverName+33			; server zone
URserverVol			EQU		URserverZone+33			; volume name
URserverAuthMeth	EQU		URserverVol+32			; user name
URsharedSysDirID	EQU		URserverAuthMeth+2		; shared system folder dir id
URuserDirID			EQU		URsharedSysDirID+4		; user system folder dir id
URfinderInfo		EQU		URuserDirID+4			; saved finder info
URbootBlocks		EQU		URfinderInfo+32			; saved boot blocks
URbootFlag			EQU		URbootBlocks+138		; server based flags
UREnd				EQU		URbootFlag+2			; total structure size
URSize				EQU		UREnd+306-18			; pad for maxddp size

;
; Offsets within the driver globals
;
netBootRefNum		EQU		0						; (word) refnum of .netBoot driver
netError			EQU		netBootRefNum+2			; (word) last error recorded
netimageBuffer		EQU		netError+2				; (long) pointer to downloaded image
netImageSignature	EQU		netimageBuffer+4		; (16 bytes) image signature
netServerAddr		EQU		netImageSignature+16	; (long) source server address
netBootPktRply		EQU		netServerAddr+4			; (BootPacketReply)
netBootStorage		EQU		netBootPktRply+18+URsize; storage for downloaded code
netpram				EQU		netBootStorage+4		; (ptr) copy of pram record
netnumAttempts		EQU		netpram+4				; number of unsuccessful attempts
netbigError			EQU		netnumAttempts+2		; error that makes us guest boot

endOfDGlobals		EQU		netbigError+2

ATGlobalsSize		EQU		endOfDGlobals			; size of globals for allocation

;
; Additional offsets for the record passed to the start code (pram record)
;
PRosType			EQU		0						; (byte) os type
PRprotocol			EQU		PRosType+1				; (byte) protocol to boot over
PRerrors			EQU		PRprotocol+1			; (byte) last error
PRflags				EQU		PRerrors+1				; (byte) net boot flags
PRsrvrHint			EQU		PRflags+1				; (byte) last server address we booted from
PRtimeout			EQU		PRsrvrHint+1			; (byte) seconds to wait for bootserver
PRsignature			EQU		PRtimeout+1				; 16 byte image signature
PRuserName			EQU		PRsignature+8			; 31 byte user name
PRpassword			EQU		PRuserName+31			; 8 byte password
PRsize				EQU		PRpassword+16			; total structure size

;
; Constants for the flags (PRflags) (1=yes, 0=no) ain't binary great for boolean logic
;
PRbootingEnabled	EQU		7						; net booting disabled
PRsavedPasswd		EQU		6						; password saved