A2osX/SBIN/DHCPCLNT.S.txt

PR#3
PREFIX /A2OSX.SRC
NEW
INC 1
AUTO 6
				.LIST OFF
				.OP	65C02
				.OR	$2000
				.TF /A2OSX.BOOT/SBIN/DHCPCLNT
*--------------------------------------
				.INB INC/MACROS.I
				.INB INC/A2OSX.I
				.INB INC/LIBSTR.I
				.INB INC/LIBTCPIP.I
*--------------------------------------
ZPFrameBase1	.EQ ZPBIN
ZPFrameLen1		.EQ ZPBIN+2
ZPFramePtr1		.EQ ZPBIN+4
ZPPtr1			.EQ ZPBIN+6
*--------------------------------------
*			File Header (16 Bytes)
*--------------------------------------
CS.START		cld
				jmp (.1,x)
				.DA #$61				6502,Level 1 (65c02)
				.DA #1					BIN Layout Version 1
				.DA 0
				.DA CS.END-CS.START
				.DA DS.END-DS.START		Data Segment to Allocate
				.DA 0
				.DA 0
*--------------------------------------
* Relocation Table
*--------------------------------------
.1				.DA CS.INIT
				.DA CS.RUN
				.DA CS.DOEVENT
				.DA	CS.QUIT
L.LIBSTR		.DA LIBSTR
L.LIBTCPIP		.DA LIBTCPIP
L.IPCFG			.DA IPCFG
				.DA 0
*--------------------------------------
CS.INIT			>LDYA L.LIBSTR
				>SYSCALL SYS.LoadLibYA
				sta hLIBSTR

				>LDYA L.LIBTCPIP
				>SYSCALL SYS.LoadLibYA
				sta hLIBTCPIP
				
				>LIBCALL hLIBTCPIP,LIBTCPIP.GET.IPCFG
				bcs .9
				>STYA ZPPtr1
				
				ldy #S.IPCFG
.1				dey
				lda (ZPPtr1),y
				sta IPCFG,y
				tya
				bne .1	
				
				>LDYA A2OSX.TIMER16
				>STYA FRAME.DISC.XID
				>STYA FRAME.REQ.XID
				>LDYA A2OSX.RANDOM16
				>STYA FRAME.DISC.XID+2
				>STYA FRAME.REQ.XID+2

				lda #0
				sta IPCFG
				
				ldy #S.IPCFG.MAC+5
				ldx #5		
.2				lda IPCFG,y
				sta FRAME.DISC.CHADDR,x
				sta FRAME.REQ.CHADDR,x
				dey
				dex
				bpl .2
				
				lda #20
				sta TimeOut
				
				lda (pPs)
				ora #S.PS.F.EVENT		Now accept events
				sta (pPs)
				
				clc
.9				rts
*--------------------------------------
CS.RUN			
CS.RUN.DISC		jsr SendDHCPDiscFrame
				bcs CS.RUN.KO
				
				lda #S.IPCFG.STATUS.SDISC
				sta IPCFG
				
CS.RUN.OFFER	>SYSCALL SYS.Sleep
				lda IPCFG
				and #S.IPCFG.STATUS.ROFFER
				bne CS.RUN.REQ
				lda TimeOut
				bne CS.RUN.OFFER
				lda #1
				bra CS.RUN.KO

CS.RUN.REQ		jsr SendDHCPReqFrame
				bcs CS.RUN.KO

				lda #S.IPCFG.STATUS.SREQ
				sta IPCFG
				
CS.RUN.RACK		>SYSCALL SYS.Sleep
				lda IPCFG
				and #S.IPCFG.STATUS.RACK
				bne CS.RUN.OK
				lda TimeOut
				bne CS.RUN.RACK
				lda #2
				bra CS.RUN.KO
				
CS.RUN.OK		lda #S.IPCFG.STATUS.OK
				sta IPCFG
				
				>PUSHW L.IPCFG
				>LIBCALL hLIBTCPIP,LIBTCPIP.SET.IPCFG

				lda #0					Leave with NO ERROR
				sec
				rts
				
CS.RUN.KO		sec
				rts
*--------------------------------------
CS.DOEVENT		lda (pEvent)
				and #S.EVT.F.TIMER		is it a TIMER event?
				beq .1					no....

				lda TimeOut
				beq .9
				
				dec TimeOut
				bra .9					do not discard TIMER event

.1				lda (pEvent)
				and #S.EVT.F.NET
				beq .9
				
				ldy #S.IPCFG.HDEV
				lda IPCFG,y
				ldy #S.EVT.hDEV
				cmp (pEvent),y
				bne .9
				
				ldy #S.EVT.DATALO		Get Frame hMem
				lda (pEvent),y
				>SYSCALL SYS.GetMemPtrA
				>STYA ZPFrameBase1
				
				ldy #S.EVT.DATAW1		Get Frame Len
				lda (pEvent),y
				sta ZPFrameLen1
				iny
				lda (pEvent),y
				sta ZPFrameLen1+1
				
				lda IPCFG
				and #S.IPCFG.STATUS.SDISC
				beq .2
				jsr CheckDHCPOfferFrame
				bcs .9
				lda #S.IPCFG.STATUS.ROFFER
				sta IPCFG
				clc
				rts
				
.2				lda IPCFG
				and #S.IPCFG.STATUS.SREQ
				beq .9
				jsr CheckDHCPAckFrame
				bcs .9
				lda #S.IPCFG.STATUS.RACK
				sta IPCFG
				
				clc
				rts
				
.9				sec
				rts
*--------------------------------------
CS.QUIT			lda hLIBTCPIP
				>SYSCALL SYS.UnloadLibA
				lda hLIBSTR
				>SYSCALL SYS.UnloadLibA
				clc
				rts
*--------------------------------------
* SendDHCPDiscFrame
*  In:
*  Out:
*--------------------------------------
SendDHCPDiscFrame
				jsr NewDHCPFrame
				bcs .9
				phx
				
				lda ZPFrameBase1
				clc
				adc #S.UDP
				sta ZPPtr1
				lda ZPFrameBase1+1
				adc /S.UDP
				sta ZPPtr1+1
				
				ldy #FRAME.DISC.LEN
.1				dey
				lda FRAME.DISC,y
				sta (ZPPtr1),y
				tya
				bne .1

				>LDYAI S.UDP+FRAME.DISC.LEN
				>PUSHYA
				>PUSHW ZPFrameBase1
				>LIBCALL hLIBTCPIP,LIBTCPIP.SEND.UDP.FRAME
				pla
				php
				>SYSCALL SYS.FreeMemA
				plp
.9				rts
*--------------------------------------
CheckDHCPOfferFrame
				jsr CheckDHCPXID
				bcs .9
				
				>LDAXI S.DHCP.OPTIONS
				jsr SetFramePtr1AX
				
				ldy #2					DHCPOffer ?
				lda (ZPFramePtr1),y
				cmp #S.DHCP.OPTIONS.DHCPOffer
				bne .9
				
				ldy #S.DHCP.YIADDR+3
				ldx #3
.1				lda (ZPFrameBase1),y
				sta FRAME.REQ.OPT.REQIP,x
				dey
				dex
				bpl .1
				
				ldx #3
				ldy #S.IPCFG.IP+3
.2				lda FRAME.REQ.OPT.REQIP,x
				sta IPCFG,y
				dey
				dex
				bpl .2
				
				ldy #S.IP.SRC+3
				ldx #3
.3				lda (ZPFrameBase1),y
				sta FRAME.REQ.OPT.SVRIP,x
				dey
				dex
				bpl .3

				ldx #3
				ldy #S.IPCFG.DHCPSRVR+3
.4				lda FRAME.REQ.OPT.SVRIP,x
				sta IPCFG,y
				dey
				dex
				bpl .4
				
.5				inc	ZPFramePtr1				skip Option 53 (DHCPOffer:530102)
				bne .6
				inc ZPFramePtr1+1
.6				lda (ZPFramePtr1)
				sec
				adc ZPFramePtr1				add option len + 1
				sta ZPFramePtr1
				bcc .7
				inc ZPFramePtr1+1
				
.7				lda (ZPFramePtr1)
				cmp #S.DHCP.OPTIONS.END
				beq .8
				jsr GetDHCPOption	
				bra .5
.8				clc
				rts
				
.9				sec
				rts
*--------------------------------------
GetDHCPOption	cmp #S.DHCP.OPTIONS.MASK
				bne .1
				ldy #S.IPCFG.MASK
				bra GetDHCPOption.CopyIP
				
.1				cmp #S.DHCP.OPTIONS.GW
				bne .2
				ldy #S.IPCFG.GW
				bra GetDHCPOption.CopyIP
				
.2				cmp #S.DHCP.OPTIONS.DNS
				bne .3
				ldy #S.IPCFG.DNS
				bra GetDHCPOption.CopyIP

.3				cmp #S.DHCP.OPTIONS.DOMAIN
				bne .9
				
				ldy #1
				ldx #$FF
.4				iny
				inx
				lda (ZPFramePtr1),y
				sta TmpBuffer256,x
				bne .4
				ldy #S.IPCFG.DOMAIN-1
				ldx #$FF
.5				iny
				inx
				lda TmpBuffer256,x
				sta IPCFG,y
				bne .5
				
				
.9				rts
GetDHCPOption.CopyIP
				phy
				ldy #2
				ldx #0
.1				lda (ZPFramePtr1),y
				sta TmpBuffer256,x
				iny
				inx
				cpx #4
				bne .1
				ply
				ldx #0
.2				lda TmpBuffer256,x
				sta IPCFG,y
				iny
				inx
				cpx #4
				bne .2
				rts
*--------------------------------------
* SendDHCPReqFrame
*  In:
*  Out:
*--------------------------------------
SendDHCPReqFrame
				jsr NewDHCPFrame
				bcs .9
				phx

				lda ZPFrameBase1
				clc
				adc #S.UDP
				sta ZPPtr1
				lda ZPFrameBase1+1
				adc /S.UDP
				sta ZPPtr1+1
				
				ldy #FRAME.REQ.LEN
.1				dey
				lda FRAME.REQ,y
				sta (ZPPtr1),y
				tya
				bne .1

				>LDYAI S.UDP+FRAME.REQ.LEN
				>PUSHYA
				>PUSHW ZPFrameBase1
				>LIBCALL hLIBTCPIP,LIBTCPIP.SEND.UDP.FRAME
				pla
				php
				>SYSCALL SYS.FreeMemA
				plp
.9				rts
*--------------------------------------
CheckDHCPAckFrame
				jsr CheckDHCPXID
				bcs .9
				
				>LDAXI S.DHCP.OPTIONS
				jsr SetFramePtr1AX
				
				ldy #2					DHCPAck ?
				lda (ZPFramePtr1),y
				cmp #S.DHCP.OPTIONS.DHCPAck
				bne .9
				
				clc
				rts
				
.9				sec
				rts
*--------------------------------------
CheckDHCPXID	ldy #S.DHCP.XID+3
				ldx #3
.1				lda (ZPFrameBase1),y
				cmp FRAME.DISC.XID,x	same XID ?
				bne .9
				dey
				dex
				bpl .1
				clc
				rts
.9				sec
				rts
*--------------------------------------
NewDHCPFrame	>LIBCALL hLIBTCPIP,LIBTCPIP.NEW.UDP.FRAME
				bcs .9
				>STYA ZPFrameBase1
				
				ldy #S.UDP.SRCPORT
				lda /UDP.PORT.DHCPC
				sta (ZPFrameBase1),y
				iny
				lda #UDP.PORT.DHCPC
				sta (ZPFrameBase1),y
				
				ldy #S.UDP.DSTPORT
				lda /UDP.PORT.DHCPS
				sta (ZPFrameBase1),y
				iny
				lda #UDP.PORT.DHCPS
				sta (ZPFrameBase1),y
				
				lda #255			S.IP.DST = 255.255.255.255
				ldy #S.IP.DST
.1				sta (ZPFrameBase1),y
				iny 
				cpy #S.IP.DST+4
				bne .1
				clc					x = hMem
.9				rts				
*--------------------------------------
SetFramePtr1AX	clc
				adc ZPFrameBase1
				sta ZPFramePtr1
				txa
				adc ZPFrameBase1+1
				sta ZPFramePtr1+1
				rts
*--------------------------------------
CS.END
LIBSTR			>PSTRING "libstr.o"
LIBTCPIP		>PSTRING "libtcpip.o"
*--------------------------------------
FRAME.DISC		.HS 01010600			OP,HTYPE,HLEN,HOPS
FRAME.DISC.XID	.BS 4
FRAME.DISC.SECS	.HS 0000
FRAME.DISC.FLAGS 	.HS 0000
FRAME.DISC.CIADDR	.HS	00000000
FRAME.DISC.YIADDR	.HS 00000000
FRAME.DISC.SIADDR	.HS 00000000
FRAME.DISC.GIADDR	.HS 00000000
FRAME.DISC.CHADDR	.HS 00000000.00000000.00000000.00000000
FRAME.DISC.SNAME	.BS 64
FRAME.DISC.FILE		.BS 128
FRAME.DISC.COOKIE	.HS 63825363
FRAME.DISC.OPT	.HS 3501
				.DA #S.DHCP.OPTIONS.DHCPDiscover
				.HS 37040103060FFF
FRAME.DISC.LEN 	.EQ *-FRAME.DISC
*--------------------------------------
FRAME.REQ		.HS 01010600			OP,HTYPE,HLEN,HOPS
FRAME.REQ.XID	.BS 4
FRAME.REQ.SECS	.HS 0000
FRAME.REQ.FLAGS 	.HS 0000
FRAME.REQ.CIADDR	.HS	00000000
FRAME.REQ.YIADDR	.HS 00000000
FRAME.REQ.SIADDR	.HS 00000000
FRAME.REQ.GIADDR	.HS 00000000
FRAME.REQ.CHADDR	.HS 00000000.00000000.00000000.00000000
FRAME.REQ.SNAME		.BS 64
FRAME.REQ.FILE		.BS 128
FRAME.REQ.COOKIE	.HS 63825363
FRAME.REQ.OPT	.HS 3501
				.DA #S.DHCP.OPTIONS.DHCPRequest
				.HS 3204
FRAME.REQ.OPT.REQIP	.BS 4
				.HS 3604
FRAME.REQ.OPT.SVRIP	.BS 4
				.HS	FF
FRAME.REQ.LEN 	.EQ *-FRAME.REQ
*--------------------------------------
hLIBSTR			.BS	1
hLIBTCPIP		.BS 1
TimeOut			.BS 1
IPCFG			.BS S.IPCFG
*--------------------------------------
DS.START
DS.END
*--------------------------------------
MAN
SAVE SBIN/DHCPCLNT.S
ASM