NEW
PREFIX /A2OSX.BUILD
AUTO 4,1
				.LIST OFF
				.OP	65C02
				.OR	$2000
				.TF SBIN/DHCPCLNT
*--------------------------------------
				.INB INC/MACROS.I
				.INB INC/A2OSX.I
				.INB INC/ETH.I
				.INB INC/LIBTCPIP.I
				.INB INC/NET.DHCP.I
*--------------------------------------
TIMEOUT.MAX		.EQ 200					20 sec.
*--------------------------------------
ZPIPCfgPtr		.EQ ZPBIN
ZPFrameBase		.EQ ZPBIN+2
ZPFramePtr		.EQ ZPBIN+4
*--------------------------------------
*			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		CS
				.DA DS.END-DS.START		DS
				.DA #64					SS
				.DA #6					ZP
				.DA 0
*--------------------------------------
* Relocation Table
*--------------------------------------
.1				.DA CS.INIT
				.DA CS.RUN
				.DA CS.DOEVENT
				.DA	CS.QUIT
L.LIBTCPIP		.DA LIBTCPIP
L.IPCFG			.DA IPCFG
L.Socket		.DA Socket
L.MSG.CFG1		.DA MSG.CFG1
L.MSG.CFG2		.DA MSG.CFG2
L.MSG.CFG.KO	.DA MSG.CFG.KO
L.MSG.CFG.OK	.DA MSG.CFG.OK
L.MSG.CFG.ND	.DA MSG.CFG.ND
L.MSG.CFG.NA	.DA MSG.CFG.NA
L.DHCP.DISC		.DA DHCP.DISC
L.DHCP.REQ		.DA DHCP.REQ
				.DA 0
*--------------------------------------
CS.INIT			>LDYA L.LIBTCPIP
				>SYSCALL LoadLib
				sta hLIBTCPIP
				
				>LIBCALL hLIBTCPIP,LIBTCPIP.GET.IPCFG
				bcs .9
				
				>STYA ZPIPCfgPtr
				
				lda (ZPIPCfgPtr)
				and #S.IPCFG.STATUS.OK
				bne .99					Already Configured, exit

				ldy #S.IPCFG.hFD
				lda (ZPIPCfgPtr),y
				beq .98
				
				ldy #S.IPCFG-1
				
.1				lda (ZPIPCfgPtr),y
				sta IPCFG,y
				dey
				bne .1
				
				stz IPCFG+S.IPCFG.STATUS

				ldx #3
				
.11				lda A2osX.TIMER16,x
				sta DHCP.DISC.XID,x
				sta DHCP.REQ.XID,x
				dex
				bpl .11

				ldx #5

.2				lda IPCFG+S.IPCFG.MAC,x
				sta DHCP.DISC.CHADDR,x
				sta DHCP.REQ.CHADDR,x
				dex
				bpl .2
				
				lda (pPs)
				ora #S.PS.F.EVENT		Now accept events
				sta (pPs)
				
				clc
.9				rts

.98				>LDYA L.MSG.CFG.ND
				bra .90
.99				>LDYA L.MSG.CFG.NA
.90				>SYSCALL puts
				lda #0
				sec
				rts
*--------------------------------------
CS.RUN			>PUSHW L.Socket

				>LIBCALL hLIBTCPIP,LIBTCPIP.SKT.New
				bcc	.1
				jmp CS.RUN.KO
				
.1				txa
				>STA.G hSocket
				
				>LDYA L.MSG.CFG1
				>SYSCALL puts

				jsr Init.Timeout
				
CS.RUN.SDISC	>PUSHB.G hSocket
				>PUSHW L.DHCP.DISC
				>PUSHWI DHCP.DISC.LEN
				>LIBCALL hLIBTCPIP,LIBTCPIP.SKT.Send
				bcc .1
				jmp CS.RUN.KO

.1				lda #S.IPCFG.STATUS.SDISC
				sta IPCFG

CS.RUN.ROFFER	>SLEEP
				
				jsr CS.RUN.SKT.RCVD
				bcc .1
				jsr Wait.Timeout
				bne CS.RUN.ROFFER

				lda #1
				jmp CS.RUN.KO
				
.1				jsr CheckDHCPOffer
				
				bcs CS.RUN.ROFFER
				
				lda #S.IPCFG.STATUS.ROFFER
				sta IPCFG
			
CS.RUN.SREQ		ldx #3

.1				>PUSHB IPCFG+S.IPCFG.DHCPSRVR,x
				dex
				bpl .1
				
				>PUSHBI 4
				>LDYA L.MSG.CFG2
				>SYSCALL printf

				>PUSHB.G hSocket
				>PUSHW L.DHCP.REQ
				>PUSHWI DHCP.REQ.LEN
				>LIBCALL hLIBTCPIP,LIBTCPIP.SKT.Send
				bcs CS.RUN.KO

				lda #S.IPCFG.STATUS.SREQ
				sta IPCFG
				
CS.RUN.RACK		>SLEEP
				
				jsr CS.RUN.SKT.RCVD
				bcc .1
				jsr Wait.Timeout
				bne CS.RUN.RACK
				lda #2
				bra CS.RUN.KO
				
.1				jsr CheckDHCPAck
				bcs CS.RUN.RACK
								
CS.RUN.OK		lda #S.IPCFG.STATUS.OK
				sta IPCFG
				
				>PUSHW L.IPCFG
				>LIBCALL hLIBTCPIP,LIBTCPIP.SET.IPCFG

				ldx #3
.1				lda IPCFG+S.IPCFG.MASK,x
				>PUSHA
				dex
				bpl .1
				
				ldx #3
.2				lda IPCFG+S.IPCFG.IP,x
				>PUSHA
				dex
				bpl .2
				
				>PUSHBI 8
				>LDYA L.MSG.CFG.OK
				>SYSCALL printf
				lda #0					Leave with NO ERROR
				sec
				rts
				
CS.RUN.KO		pha
				>PUSHA
				>PUSHBI 1
				>LDYA L.MSG.CFG.KO
				>SYSCALL printf
				pla
				sec
				rts
*--------------------------------------
CS.RUN.SKT.RCVD	>LDA.G hSocket
				>LIBCALL hLIBTCPIP,LIBTCPIP.SKT.Rcvd
				bcs .9
				>STA.G hFrame

				>SYSCALL GetMemPtr
				>STYA ZPFrameBase				
.9				rts
*--------------------------------------
CS.DOEVENT		lda (pEvent)
				bpl .9					is it a TIMER event?

				ldy #TimeOut
				lda (pData),y
				beq .9
				
				dec 
				sta (pData),y
				
.9				sec						do not discard TIMER event
				rts
*--------------------------------------
CS.QUIT			>LDA.G hSocket
				beq .1

				>LIBCALL hLIBTCPIP,LIBTCPIP.SKT.Close
				
.1				lda hLIBTCPIP
				>SYSCALL UnloadLib
				clc
				rts
*--------------------------------------
CheckDHCPOffer	jsr CheckDHCPXID
				bcs .9
				
				lda ZPFrameBase
				clc 
				adc #S.DHCP.OPTIONS
				sta ZPFramePtr

				lda ZPFrameBase+1
				adc /S.DHCP.OPTIONS
				sta ZPFramePtr+1
				
				lda (ZPFramePtr)
				cmp #S.DHCP.OPTIONS.MSGTYPE
				bne .9
				
				ldy #2
				lda (ZPFramePtr),y
				cmp #S.DHCP.OPTIONS.DHCPOffer
				bne .9
				
				ldy #S.DHCP.GIADDR+3
				ldx #3
				
.1				lda (ZPFrameBase),y
				sta DHCP.REQ.GIADDR,x
				dey
				dex
				bpl .1
				
				ldy #S.DHCP.YIADDR+3
				ldx #3
				
.2				lda (ZPFrameBase),y
				sta DHCP.REQ.OPT.REQIP,x
				sta IPCFG+S.IPCFG.IP,x
				dey
				dex
				bpl .2
				
				ldy #S.IP.SRC+3
				ldx #3
				
.3				lda (ZPFrameBase),y
				sta DHCP.REQ.OPT.SVRIP,x
				sta IPCFG+S.IPCFG.DHCPSRVR,x
				dey
				dex
				bpl .3

.5				inc	ZPFramePtr				skip Option 53 (DHCPOffer:530102)
				bne .6
				inc ZPFramePtr+1
				
.6				lda (ZPFramePtr)
				sec
				adc ZPFramePtr				add option len + 1
				sta ZPFramePtr
				bcc .7
				inc ZPFramePtr+1
				
.7				lda (ZPFramePtr)
				cmp #S.DHCP.OPTIONS.END
				beq .8
				jsr GetDHCPOption	
				bra .5
				
.8				jsr CS.RUN.DISCARD
				clc
				rts
				
.9				jsr CS.RUN.DISCARD
				sec
				rts
*--------------------------------------
CS.RUN.DISCARD	>LDA.G hFrame
				>SYSCALL FreeMem
				rts
*--------------------------------------
GetDHCPOption	cmp #S.DHCP.OPTIONS.MASK
				bne .1
				ldx #S.IPCFG.MASK
				bra GetDHCPOption.CopyIP
				
.1				cmp #S.DHCP.OPTIONS.GW
				bne .2
				
				ldx #S.IPCFG.GW
				bra GetDHCPOption.CopyIP
				
.2				cmp #S.DHCP.OPTIONS.DNS
				bne .3
				
				ldx #S.IPCFG.DNS1
				bra GetDHCPOption.CopyIP

.3				cmp #S.DHCP.OPTIONS.DOMAIN
				bne .9
				
				ldy #1
				
				lda (ZPFramePtr),y		Get String len
				cmp #80
				bcc .4
				lda #79
				
.4				sta IPCFG+S.IPCFG.DOMAIN	store len
				tax
				
.5				iny
				lda (ZPFramePtr),y
				sta IPCFG+S.IPCFG.DOMAIN-1,y
				dex
				bne .5
			
.9				rts
*--------------------------------------
GetDHCPOption.CopyIP
				ldy #1
				lda (ZPFramePtr),y		Get Byte count
				cmp #9
				bcc .1
				lda #8					max 8 bytes (2 DNS)
				
.1				iny
				
.2				pha
				
				lda (ZPFramePtr),y
				sta IPCFG,x
				iny
				inx
				
				pla
				dec
				bne .2
				
				rts
*--------------------------------------
CheckDHCPAck	jsr CheckDHCPXID
				bcs .9
				
				lda ZPFrameBase
				clc 
				adc #S.DHCP.OPTIONS
				sta ZPFramePtr

				lda ZPFrameBase+1
				adc /S.DHCP.OPTIONS
				sta ZPFramePtr+1
				
				lda (ZPFramePtr)
				cmp #S.DHCP.OPTIONS.MSGTYPE
				bne .9
				
				ldy #2
				lda (ZPFramePtr),y
				cmp #S.DHCP.OPTIONS.DHCPAck
				bne .9
				
				jsr CS.RUN.DISCARD
				clc
				rts
				
.9				jsr CS.RUN.DISCARD
				sec
				rts
*--------------------------------------
CheckDHCPXID	ldy #S.DHCP.XID+3
				ldx #3
				
.1				lda (ZPFrameBase),y
				cmp DHCP.DISC.XID,x	same XID ?
				bne .9
				dey
				dex
				bpl .1
				
				clc
				rts
				
.9				sec
				rts
*--------------------------------------
Init.Timeout	ldy #TimeOut
				lda #TIMEOUT.MAX
				sta (pData),y
				rts
*--------------------------------------
Wait.TimeOut	ldy #TimeOut
				lda (pData),y
				rts
*--------------------------------------
CS.END
LIBTCPIP		.AZ "libtcpip.o"
MSG.CFG1		.AZ "DHCPCLNT:Searching for DHCP servers..."
MSG.CFG2		.AZ "DHCPCLNT:Reply from DHCP Server at %d.%d.%d.%d, requesting...\r\n"
MSG.CFG.KO		.AZ "DHCPCLNT:Time Out [%h].\r\n"
MSG.CFG.OK		.AZ "DHCPCLNT:Success:[IP=%d.%d.%d.%d/%d.%d.%d.%d]\r\n"
MSG.CFG.ND		.AZ "DHCPCLNT:No Device, exiting."
MSG.CFG.NA		.AZ "DHCPCLNT:TCPIP Already configured, exiting."
hLIBTCPIP		.BS 1
IPCFG			.BS S.IPCFG
*--------------------------------------
Socket			.DA #S.SOCKET.SOCK.DGRAM
				.BS 3
				.HS 00.00.00.00			Socket.Src.Addr
				.DA UDP.PORT.DHCPC		Socket.Src.Port
				.HS FF.FF.FF.FF			Socket.Dst.Addr
				.DA UDP.PORT.DHCPS		Socket.Dst.Port
*--------------------------------------
DHCP.DISC		.HS 01010600			OP,HTYPE,HLEN,HOPS
DHCP.DISC.XID	.BS 4
				.HS 0000				SECS
				.DA S.DHCP.FLAGS.BRDCST
				.HS	00000000			CIADDR
DHCP.DISC.YIADDR	.HS 00000000
				.HS 00000000			SIADDR
DHCP.DISC.GIADDR	.HS 00000000			
DHCP.DISC.CHADDR	.HS 00000000.00000000.00000000.00000000
				.BS 64					SNAME
				.BS 128					FILE
				.HS 63825363			COOKIE
				.HS 3501				OPT
				.DA #S.DHCP.OPTIONS.DHCPDiscover
				.HS 37040103060FFF
DHCP.DISC.LEN	.EQ *-DHCP.DISC
*--------------------------------------
DHCP.REQ		.HS 01010600			OP,HTYPE,HLEN,HOPS
DHCP.REQ.XID	.BS 4
				.HS 0000				SECS
				.DA S.DHCP.FLAGS.BRDCST
				.HS	00000000			CIADDR
DHCP.REQ.YIADDR	.HS 00000000
				.HS 00000000			SIADDR
DHCP.REQ.GIADDR	.HS 00000000
DHCP.REQ.CHADDR	.HS 00000000.00000000.00000000.00000000
				.BS 64					SNAME
				.BS 128					FILE
				.HS 63825363			COOKIE
				.HS 3501				OPT
				.DA #S.DHCP.OPTIONS.DHCPRequest
				.HS 3204
DHCP.REQ.OPT.REQIP	.BS 4
				.HS 3604
DHCP.REQ.OPT.SVRIP	.BS 4
				.HS	FF
DHCP.REQ.LEN 	.EQ *-DHCP.REQ
*--------------------------------------
DS.START
TimeOut			.BS 1
hSocket			.BS 1
hFrame			.BS 1
DS.END
MAN
SAVE /A2OSX.SRC/SBIN/DHCPCLNT.S
ASM