A2osX/LIB/LIBTCPIP.S.SKT.txt

PR#3
PREFIX /A2OSX.BUILD
LOMEM $900
INC 1
AUTO 6
				.LIST OFF	
*/--------------------------------------
* # SKT.New
*  Create a new socket
* ## In : 
*  PUSHW = PTR to S.SOCKET template
* ## Out : 
*  YA = PTR to new S.SOCKET
*  X = hSocket
*\--------------------------------------
SKT.New			clc
				.HS B0					BCS
SKT.New.Listen	sec
				ror
				sta .71+1
				>PULLW ZPTmpPtr1
				ldy #S.SOCKET.SRC.PORT+1
				lda (ZPTmpPtr1),y
				dey
				ora (ZPTmpPtr1),y
				bne .1
				
				jsr GetDynPort
				sta (ZPTmpPtr1),y
				txa
				iny
				sta (ZPTmpPtr1),y
				
.1				lda hSocketTable
				>SYSCALL GetMemPtrA
				>STYA ZPTmpPtr2

				lda #$ff
				sta TmpOffset			to keep track of any free slot
				
				ldx #0
				
.2				lda (ZPTmpPtr2)
				beq .4					empty!!!
				
				cmp (ZPTmpPtr1)
				bne .5					not same SKT type...try next
				
				ldy #S.SOCKET.SRC.ADDR
				
.3				lda (ZPTmpPtr1),y
				cmp (ZPTmpPtr2),y
				bne .5
				iny
				cpy #S.SOCKET.DST.PORT+2
				bne .3

				lda #ERR.SKT.BUSY		same one!!!!! busy...
				sec
				rts
				
.4				lda TmpOffset
				bpl .5					already found an empty slot....

				>LDYA ZPTmpPtr2			found one...
				>STYA ZPTmpPtr3			save it!
				stx TmpOffset
				
.5				lda ZPTmpPtr2
				clc
				adc #S.SOCKET
				sta ZPTmpPtr2
				bcc .6
				inc ZPTmpPtr2+1
.6				inx
				cpx #K.SKTTABLE.SIZE
				bne .2
				
				lda TmpOffset			Did we found an empty slot ?
				bmi .9
				
				ldy #S.SOCKET.HDR-1
				
.7				lda (ZPTmpPtr1),y
				sta (ZPTmpPtr3),y
				dey
				bpl .7
				
				lda (ZPTmpPtr1)
				cmp #S.SOCKET.SOCK.STREAM
				bne .8
				
				ldy #S.SOCKET.SO
				lda (ZPTmpPtr1),y
				and #S.SOCKET.SO.ACCEPTCONN
				bne .8
				
				jsr SKT.NewTCB
				bcs .99
				
.71				lda #$ff
				bmi .8					From Listen, do not send SYN packet
				
				>LDYA ZPTmpPtr3
				>STYA ZPPtrSKT
				lda #S.TCP.OPTIONS.SYN
				jsr TCP.OUT.SendOptA	Send SYN,Only for CLIENT conn!!!!				
				bcs .99
				
				ldy #S.SOCKET.TCP.STATUS
				lda #S.SOCKET.TCP.STATUS.SYNSENT
				sta (ZPPtrSKT),y
				
.8				lda TmpOffset
				ora #$80
				tax
				>LDYA ZPTmpPtr3
				clc
				rts
				
.9				lda #ERR.SKT.OOS
				sec
.99				rts
*/--------------------------------------
* # SKT.CloseA
*  Close socket
* ## In : 
*  A = hSocket
* ## Out : 
*\--------------------------------------
SKT.CloseA		and #$7f
				cmp #K.SKTTABLE.SIZE 
				bcs .9
				
				jsr SKT.GetA.I
				bcs .9
				
				cmp #S.SOCKET.SOCK.DGRAM
				beq .1

				cmp #S.SOCKET.SOCK.RAW
				beq .1
				
				cmp #S.SOCKET.SOCK.STREAM
				bne .9
				
				ldy #S.SOCKET.SO
				lda (ZPPtrSKT),y
				bit #S.SOCKET.SO.ACCEPTCONN
				
				bne *
				
				ldy #S.SOCKET.TCP.OPTIONS
				lda (ZPPtrSKT),y
				ora #S.TCP.OPTIONS.FIN
				sta (ZPPtrSKT),y
				
				jsr TCP.OUT				SKT.Close, Try to push FIN
				
				clc
				rts
				
.9				lda #ERR.SKT.BAD
				sec
				rts
								
.1				ldy #S.SOCKET.HQ.TAIL
				lda (ZPPtrSKT),y
				ldy #S.SOCKET.HQ.HEAD
				cmp (ZPPtrSKT),y
				beq .8
				
				pha
				clc
				adc #S.SOCKET.HQ
				tax
				pla
				inx
				cmp #S.SOCKET.HQ.MAX
				beq .2
				
				lda #0
.2
				ldy #S.SOCKET.HQ.TAIL
				sta (ZPPtrSKT),y
				
				txa
				>SYSCALL FreeMemA
				bra .1
				
.8				lda #0
				sta (ZPPtrSKT)
				clc
				rts
*/--------------------------------------
* # SKT.GetA
*  Get Ptr to socket
* ## In : 
*  A = hSocket
* ## Out : 
*  Y,A = pS.SOCKET
*\--------------------------------------
SKT.GetA		jsr SKT.GetA.I
				
				bcs .9
				
				>LDYA ZPPtrSKT
				
.9				rts
				
SKT.GetA.I		and #$7f
				
				cmp #K.SKTTABLE.SIZE 
				bcs .9
				
				pha
				lda hSocketTable
				>SYSCALL GetMemPtrA
				>STYA ZPPtrSKT
				
				pla
				beq .8
				
				stz .1+1
				lsr
				ror .1+1
				lsr
				ror .1+1
				lsr
				ror .1+1
				
				pha
				
				lda ZPPtrSKT
				clc
.1				adc #$ff
				sta ZPPtrSKT
				
				pla				
				adc ZPPtrSKT+1
				sta ZPPtrSKT+1
			
.8				lda (ZPPtrSKT)
				beq .9

				clc
				rts
				
.9				lda #ERR.SKT.BAD
				sec
				rts
*/--------------------------------------
* # SKT.GetTable
*  Get socket table
* ## In : 
* ## Out : 
*  Y,A = pS.SOCKET
*\--------------------------------------
SKT.GetTable	lda hSocketTable
				>SYSCALL GetMemPtrA
				clc
				rts
*/--------------------------------------
* # SKT.AcceptA
*  Check for an incoming connection
* ## In : 
*  A = hListeningSocket
* ## Out : 
*  A = hSocket
*\--------------------------------------
SKT.AcceptA		jsr SKT.GetA.I
				bcs .9
				ldy #S.SOCKET.SO
				lda (ZPPtrSKT),y
				and #S.SOCKET.SO.ACCEPTCONN
				beq .99
				
				ldy #S.SOCKET.HQ.TAIL
				lda (ZPPtrSKT),y
				ldy #S.SOCKET.HQ.HEAD
				cmp (ZPPtrSKT),y		Queue Empty
				beq .9					CS
				
				pha						save tail...
				inc
				cmp #S.SOCKET.HQ.MAX
				bne .1
				
				lda #0
				
.1				ldy #S.SOCKET.HQ.TAIL
				sta (ZPPtrSKT),y
				pla
				clc
				adc #S.SOCKET.HQ
				tay
				lda (ZPPtrSKT),y
				clc
				rts
				
.99				lda #ERR.SKT.BAD
				sec
.9				rts
*/--------------------------------------
* # SKT.MkNodA
*  Create a new file from TCP socket
* ## In : 
*  A = hSocket
* ## Out : 
*  A = hFile
*\--------------------------------------
SKT.MkNodA		sta NODE.SSOCK+S.NODE.SSOCK.HSKT
				>SYSCALL MkNodA
				bcs .9
				
				>STYA ZPTmpPtr1

				ldy #S.NODE.SSOCK-1
				
.1				lda NODE.SSOCK,y
				sta (ZPTmpPtr1),y
				dey
				bpl .1
				txa
*				clc
				
.9				rts
*/--------------------------------------
* # SKT.Write (DGRAM,STREAM,RAW)
*  Send block of data
* ## In : 
*  PUSHB = hSocket
*  PUSHW = pBuf
*  PUSHW = len
* ## Out : 
*\--------------------------------------
SKT.Write		>PULLW ZPDataInLen
				>PULLW ZPDataInPtr
				>PULLA

				jsr SKT.GetA.I
				bcs .9

				cmp #S.SOCKET.SOCK.DGRAM
				beq SKT.Write.UDP
			
				cmp #S.SOCKET.SOCK.RAW
				beq SKT.Write.RAW
				
				cmp #S.SOCKET.SOCK.STREAM
				bne .99
				
				ldy #S.SOCKET.SO
				lda (ZPPtrSKT),y
				and #S.SOCKET.SO.ACCEPTCONN
				bne .99
				jmp SKT.Write.TCP
				
.99				lda #ERR.SKT.BAD
				sec
.9				rts
*--------------------------------------
SKT.Write.RAW	ldy #S.SOCKET.RAW.PROTO
				lda (ZPPtrSKT),y

				tax
				>LDYA ZPDataInLen
				jsr FRM.NewIP
				bcs .9
				
				jsr SKT.SetFrameOutDstIP
				
				jsr SKT.CopyDataInToOut
								
				jmp FRM.SendIP
				
.9				rts
*--------------------------------------
SKT.Write.UDP	ldx #S.IP.PROTOCOL.UDP
				>LDYA ZPDataInLen
				jsr FRM.NewIP
				bcs .9
				
				jsr SKT.SetFrameOutDstIP
				
				ldy #S.SOCKET.SRC.PORT
				lda (ZPPtrSKT),y
				tax
				iny
				lda (ZPPtrSKT),y
 				ldy #S.UDP.SRCPORT
				sta (ZPFrameOutPtr),y
				iny
				txa
				sta (ZPFrameOutPtr),y
				
				ldy #S.SOCKET.DST.PORT
				lda (ZPPtrSKT),y
				tax
				iny
				lda (ZPPtrSKT),y
 				ldy #S.UDP.DSTPORT
				sta (ZPFrameOutPtr),y
				iny
				txa
				sta (ZPFrameOutPtr),y

				jsr SKT.CopyDataInToOut				

				jmp FRM.SendIP

.9				rts
*--------------------------------------
SKT.Write.TCP	ldy #S.SOCKET.TCP.STATUS	
				lda (ZPPtrSKT),y
				cmp #S.SOCKET.TCP.STATUS.ESTBLSH
				bne .91

				jsr SKT.AddDataToSktOut   will call SKT.GetTCB 
				bcs .90

				jsr TCP.OUT.I			SKT.GetTCB called, try to push, ignore error....
				clc
				rts
				
.90				lda #0					no data transfered
				sec
				rts
				
.91				lda #MLI.ERR.IO
				sec
.99				rts				
*/--------------------------------------
* # SKT.ReadA (DGRAM,RAW)
* ## In : 
*  A = hSocket
* ## Out : 
*  A = hFrame
*\--------------------------------------
SKT.ReadA		jsr SKT.GetA.I
				bcs .9
				
				ldy #S.SOCKET.HQ.TAIL
				lda (ZPPtrSKT),y
				tax
				
				ldy #S.SOCKET.HQ.HEAD
				cmp (ZPPtrSKT),y
				beq .99
				
				inc
				cmp #S.SOCKET.HQ.MAX
				bne .1
				lda #0
				
.1				ldy #S.SOCKET.HQ.TAIL
				sta	(ZPPtrSKT),y
				
				txa
				clc
				adc #S.SOCKET.HQ
				tay
				lda (ZPPtrSKT),y
				clc
				rts
				
.99				sec
.9				rts
*/--------------------------------------
* # SKT.PutC (STREAM)
*  Write a Char To Stream
* ## In : 
*  PUSHB = hSocket
*  PUSHB = Char
* ## Out : 
*\--------------------------------------
SKT.PutC		>PULLB TmpByte

				ldx #1
				stx ZPDataInLen
				stz ZPDataInLen+1
				
				ldx L.TmpByte
				stx ZPDataInPtr
				
				ldx L.TmpByte+1
				stx ZPDataInPtr+1
				bra SKT.PutS.1
*/--------------------------------------
* # SKT.PutS (STREAM)
*  Write Line in pBuf
* ## In : 
*  PUSHB = hSocket
*  PUSHW = PSTR
* ## Out :
*\--------------------------------------
SKT.PutS		>PULLW ZPDataOutPtr
				lda (ZPDataInPtr)
				
				sta ZPDataInLen
				stz ZPDataInLen+1
				
				inc ZPDataInPtr
				bne SKT.PutS.1
				inc ZPDataInPtr+1
				
SKT.PutS.1		>PULLA
				jsr SKT.GetA.I
				bcs .9

				cmp #S.SOCKET.SOCK.STREAM
				bne .9
				
				jmp SKT.Write.TCP
				
.9				lda #ERR.SKT.BAD
				sec
				rts				
*/--------------------------------------
* # SKT.GetCA (STREAM)
*  Read a Char From Stream in A
* ## In : 
*  A = hSocket
* ## Out : 
*  A = char
*\--------------------------------------
SKT.GetCA		stz bTextMode

				ldx #1
				stx ZPDataOutLen
				stz ZPDataOutLen+1
				
				ldx L.TmpByte
				stx ZPDataOutPtr
				ldx L.TmpByte+1
				stx ZPDataOutPtr+1

				jsr SKT.Read.I
				bcs .9
				lda TmpByte

.9				rts
*/--------------------------------------
* # SKT.GetS (STREAM)
*  Read a CR terminated Line in pBuf
* ## In : 
*  PUSHB = hSocket
*  PUSHW = pBuf
*  PUSHW = len
* ## Out :
*  Y,A = bytes read
*\--------------------------------------
SKT.GetS		sec
				.HS 90					bcc
*/--------------------------------------
* # SKT.Read (STREAM)
*  Read data in pBuf
* ## In : 
*  PUSHB = hSocket
*  PUSHW = pBuf
*  PUSHW = len
* ## Out :
*  Y,A = bytes transfered
*\--------------------------------------
SKT.Read 		clc
				ror bTextMode
				>PULLW ZPDataOutLen
				>PULLW ZPDataOutPtr
				>PULLA
				
SKT.Read.I		jsr SKT.GetA.I
				bcs .99
				cmp #S.SOCKET.SOCK.STREAM
				bne .90					bad skt
				
				ldy #S.SOCKET.SO
				lda (ZPPtrSKT),y
				and #S.SOCKET.SO.ACCEPTCONN
				bne .90					Bad Skt
				
				ldy #S.SOCKET.TCP.STATUS
				lda (ZPPtrSKT),y
				cmp #S.SOCKET.TCP.STATUS.ESTBLSH
				bcc .92					Not yet established...no data
				bne .91					closing...IO err

				jsr SKT.GetDataFromSktIn
				rts						if CS, No data...
				
.90				lda #ERR.SKT.BAD
				sec
				rts
				
.91				lda #MLI.ERR.IO
				sec
				rts

.92				lda #0
				sec
.99				rts
*--------------------------------------
*  PRIVATE
*--------------------------------------
* ZPPtrSKT -> actual socket
* A = hSocket or hFrame
*--------------------------------------
SKT.AddToQueueA sta .2+1
				ldy #S.SOCKET.HQ.HEAD
				lda (ZPPtrSKT),y
				tax
				inc 
				cmp #S.SOCKET.HQ.MAX
				bne .1
				lda #0
.1				ldy #S.SOCKET.HQ.TAIL
				cmp (ZPPtrSKT),y
				beq .9					Queue full!!
				
				ldy #S.SOCKET.HQ.HEAD
				sta (ZPPtrSKT),y
				txa
				clc
				adc #S.SOCKET.HQ
				tay
				
.2				lda #$ff
				sta (ZPPtrSKT),y
				clc
				rts
				
.9				sec
				rts
*--------------------------------------
* From TCP.IN
* Src : ZPDataInPtr/ZPDataInLen
* Dst : hInMem/INHEAD
*--------------------------------------
SKT.AddDataToSktIn
				ldx SKT.TCBCache+S.TCB.INFREE
				cpx ZPDataInLen
				lda SKT.TCBCache+S.TCB.INFREE+1
				sbc ZPDataInLen+1
				bcc .9					Not enough room in Q
				
				ldy #S.TCP.SEQNUM+3
				ldx #3

.10				lda (ZPFrameInPtr),y
				eor SKT.TCBCache+S.TCB.INLASTSEQNUM,x
				bne .9
				dey
				dex
				bpl .10
				
				ldy #S.SOCKET.SQ.hInMem
				lda (ZPPtrSKT),y
				>SYSCALL GetMemPtrA
				>STYA ZPTmpPtr1			Make ZPTmpPtr1=buffer base

				lda ZPTmpPtr1
				clc
				adc SKT.TCBCache+S.TCB.INHEAD
				sta ZPTmpPtr2

				lda ZPTmpPtr1+1
				adc SKT.TCBCache+S.TCB.INHEAD+1
				sta ZPTmpPtr2+1			Make ZPTmpPtr2=base+Tail
				
				lda ZPDataInLen
				eor #$FF
				tax
				
				lda ZPDataInLen+1
				eor #$FF
				pha
				
				ldy #0

.1				inx
				bne .2
				pla
				inc
				beq .8
				
				pha
				
.2				lda (ZPDataInPtr),y
				sta (ZPTmpPtr2)
				iny
				bne .3
				inc ZPDataInPtr+1

.3				inc ZPTmpPtr2
				bne .4
				inc ZPTmpPtr2+1
				
.4				inc SKT.TCBCache+S.TCB.INHEAD
				bne .1
				inc SKT.TCBCache+S.TCB.INHEAD+1
				lda SKT.TCBCache+S.TCB.INHEAD+1
				cmp /K.TCP.WSIZE
				bne .1
				stz SKT.TCBCache+S.TCB.INHEAD+1
				
				lda ZPTmpPtr1			Dst Ptr=Buffer Base
				sta ZPTmpPtr2
				lda ZPTmpPtr1+1
				sta ZPTmpPtr2+1
				bra .1

.9				sec
				rts
				
.8				lda SKT.TCBCache+S.TCB.INFREE
				sec 
				sbc ZPDataInLen
				sta SKT.TCBCache+S.TCB.INFREE
				
				lda SKT.TCBCache+S.TCB.INFREE+1
				sbc ZPDataInLen+1
				sta SKT.TCBCache+S.TCB.INFREE+1
				
				lda SKT.TCBCache+S.TCB.INUSED
				clc 
				adc ZPDataInLen
				sta SKT.TCBCache+S.TCB.INUSED
				
				lda SKT.TCBCache+S.TCB.INUSED+1
				adc ZPDataInLen+1
				sta SKT.TCBCache+S.TCB.INUSED+1
			
				clc
				
				lda SKT.TCBCache+S.TCB.INLASTSEQNUM+3
				adc ZPDataInLen
				sta SKT.TCBCache+S.TCB.INLASTSEQNUM+3
				
				lda SKT.TCBCache+S.TCB.INLASTSEQNUM+2
				adc ZPDataInLen+1
				sta SKT.TCBCache+S.TCB.INLASTSEQNUM+2
				bcc .80
				inc SKT.TCBCache+S.TCB.INLASTSEQNUM+1
				bne .80
				inc SKT.TCBCache+S.TCB.INLASTSEQNUM

.80				clc
				rts
*--------------------------------------
* From SKT.Read
* In:
*  Src : hInMem/INTAIL
*  Dst : ZPDataOutPtr/ZPDataOutLen
*  bTextMode
* Out:
*  Y,A = bytes read
*--------------------------------------
SKT.GetDataFromSktIn
				jsr SKT.GetTCB
				lda SKT.TCBCache+S.TCB.INUSED
				ora SKT.TCBCache+S.TCB.INUSED+1
				bne .10
				sec
				rts						A=0,NO DATA

.10				ldy #S.SOCKET.SQ.hInMem
				lda (ZPPtrSKT),y
				>SYSCALL GetMemPtrA
				>STYA ZPTmpPtr1			Make ZPTmpPtr1=buffer base

				lda ZPTmpPtr1
				clc
				adc SKT.TCBCache+S.TCB.INTAIL
				sta ZPTmpPtr2

				lda ZPTmpPtr1+1
				adc SKT.TCBCache+S.TCB.INTAIL+1
				sta ZPTmpPtr2+1
				
				lda ZPDataOutLen
				eor #$FF
				tax
				
				lda ZPDataOutLen+1
				eor #$FF
				pha
				
				stz ZPTmpPtr3			Reset byte counter
				stz ZPTmpPtr3+1
				
				ldy #0
				
.1				inx						Check if room left in dest buffer
				bne .2
				pla
				inc
				beq .8

				pha
				
.2				lda SKT.TCBCache+S.TCB.INTAIL
				eor SKT.TCBCache+S.TCB.INHEAD
				bne .3
				lda SKT.TCBCache+S.TCB.INTAIL+1
				eor SKT.TCBCache+S.TCB.INHEAD+1
				beq .7					no more data....
				
.3				lda (ZPTmpPtr2)
				pha
				
				inc SKT.TCBCache+S.TCB.INTAIL
				bne .5
				
				inc SKT.TCBCache+S.TCB.INTAIL+1
				lda SKT.TCBCache+S.TCB.INTAIL+1
				cmp /K.TCP.WSIZE
				bne .4
				
				stz SKT.TCBCache+S.TCB.INTAIL+1
				lda ZPTmpPtr1
				sta ZPTmpPtr2
				lda ZPTmpPtr1+1
				sta ZPTmpPtr2+1
				bra .5
				
.4				inc ZPTmpPtr2
				bne .5
				inc ZPTmpPtr2+1
				
.5				pla						get back data....
				
				bit bTextMode			do we need to check CR ?
				bpl .6
				
				cmp #13
				beq .7
				
.6				sta (ZPDataOutPtr),y
				iny
				bne .61
				inc ZPDataOutPtr+1
				
.61				inc ZPTmpPtr3
				bne .1
				inc ZPTmpPtr3+1
				
				bra .1
				
.7				pla						discard byte counter HI

.8				bit bTextMode			here, bacause dst buf full....
				bmi .9					....and TextMode selected, NO ending CR found
				
				lda ZPTmpPtr3			Do we have transfered something?
				ora ZPTmpPtr3+1
				beq .9
				
				lda SKT.TCBCache+S.TCB.INFREE
				clc
				adc ZPTmpPtr3
				sta SKT.TCBCache+S.TCB.INFREE
				
				lda SKT.TCBCache+S.TCB.INFREE+1
				adc ZPTmpPtr3+1
				sta SKT.TCBCache+S.TCB.INFREE+1

				lda SKT.TCBCache+S.TCB.INUSED
				sec
				sbc ZPTmpPtr3
				sta SKT.TCBCache+S.TCB.INUSED
				
				lda SKT.TCBCache+S.TCB.INUSED+1
				sbc ZPTmpPtr3+1
				sta SKT.TCBCache+S.TCB.INUSED+1

				lda SKT.TCBCache+S.TCB.OUTACKNUM+3
				clc 
				adc ZPTmpPtr3
				sta SKT.TCBCache+S.TCB.OUTACKNUM+3
				
				lda SKT.TCBCache+S.TCB.OUTACKNUM+2
				adc ZPTmpPtr3+1
				sta SKT.TCBCache+S.TCB.OUTACKNUM+2
				
				bcc .80
				inc SKT.TCBCache+S.TCB.OUTACKNUM+1
				bne .80
				inc SKT.TCBCache+S.TCB.OUTACKNUM
				
.80				jsr SKT.StoreTCB

				ldy #S.SOCKET.TCP.OPTIONS
				lda (ZPPtrSKT),y
				ora #S.TCP.OPTIONS.ACK
				sta (ZPPtrSKT),y

				jsr TCP.OUT.I			SKT.GetTCB already called, Try to ACK read DATA
				
				>LDYA ZPTmpPtr3
				clc
				rts
				
.9				lda #0					NO DATA
				sec
				rts
*--------------------------------------
* From SKT.Write.TCP
* Src : ZPDataInPtr/ZPDataInLen
* Dst : hOutMem/OUTHEAD
*--------------------------------------
SKT.AddDataToSktOut
				jsr SKT.GetTCB 
				ldx SKT.TCBCache+S.TCB.OUTFREE
				cpx ZPDataInLen
				lda SKT.TCBCache+S.TCB.OUTFREE+1
				sbc ZPDataInLen+1
				bcc .9					Not enough room in Q
				
				ldy #S.SOCKET.SQ.hOutMem
				lda (ZPPtrSKT),y
				>SYSCALL GetMemPtrA
				>STYA ZPTmpPtr1			Make ZPTmpPtr1=buffer base

				lda ZPTmpPtr1
				clc
				adc SKT.TCBCache+S.TCB.OUTHEAD
				sta ZPTmpPtr2

				lda ZPTmpPtr1+1
				adc SKT.TCBCache+S.TCB.OUTHEAD+1
				sta ZPTmpPtr2+1			Make ZPTmpPtr2=base+Tail
				
				lda ZPDataInLen
				eor #$FF
				tax
				
				lda ZPDataInLen+1
				eor #$FF
				pha
				
				ldy #0

.1				inx
				bne .2
				pla
				inc
				beq .8
				
				pha
				
.2				lda (ZPDataInPtr),y
				sta (ZPTmpPtr2)
				iny
				bne .3
				inc ZPDataInPtr+1

.3				inc ZPTmpPtr2
				bne .4
				inc ZPTmpPtr2+1
				
.4				inc SKT.TCBCache+S.TCB.OUTHEAD
				bne .1
				inc SKT.TCBCache+S.TCB.OUTHEAD+1
				lda SKT.TCBCache+S.TCB.OUTHEAD+1
				cmp /K.TCP.WSIZE
				bne .1
				stz SKT.TCBCache+S.TCB.OUTHEAD+1
				
				lda ZPTmpPtr1			Dst Ptr=Buffer Base
				sta ZPTmpPtr2
				lda ZPTmpPtr1+1
				sta ZPTmpPtr2+1
				bra .1

.9				sec
				rts
				
.8				lda SKT.TCBCache+S.TCB.OUTFREE
				sec 
				sbc ZPDataInLen
				sta SKT.TCBCache+S.TCB.OUTFREE
				lda SKT.TCBCache+S.TCB.OUTFREE+1
				sbc ZPDataInLen+1
				sta SKT.TCBCache+S.TCB.OUTFREE+1
				
				lda SKT.TCBCache+S.TCB.OUTUSED
				clc 
				adc ZPDataInLen
				sta SKT.TCBCache+S.TCB.OUTUSED
				lda SKT.TCBCache+S.TCB.OUTUSED+1
				adc ZPDataInLen+1
				sta SKT.TCBCache+S.TCB.OUTUSED+1
			
				lda SKT.TCBCache+S.TCB.OUTTOSEND
				clc 
				adc ZPDataInLen
				sta SKT.TCBCache+S.TCB.OUTTOSEND
				lda SKT.TCBCache+S.TCB.OUTTOSEND+1
				adc ZPDataInLen+1
				sta SKT.TCBCache+S.TCB.OUTTOSEND+1
				jsr SKT.StoreTCB
				rts
*--------------------------------------
* From TCP.OUT
* Src : hOutMem/OUTTAIL
* Dst : ZPDataOutPtr/ZPDataOutLen
*--------------------------------------
SKT.GetDataFromSktOut
				ldy #S.SOCKET.SQ.hOutMem
				lda (ZPPtrSKT),y
				
				>SYSCALL GetMemPtrA
				>STYA ZPTmpPtr1			Make ZPTmpPtr1=buffer base

				lda ZPTmpPtr1
				clc
				adc SKT.TCBCache+S.TCB.OUTTAILNEXT
				sta ZPTmpPtr2			Make ZPTmpPtr2=base+nexttail

				lda ZPTmpPtr1+1
				adc SKT.TCBCache+S.TCB.OUTTAILNEXT+1
				sta ZPTmpPtr2+1
				
				lda ZPDataOutLen
				eor #$FF
				tax
				
				lda ZPDataOutLen+1
				eor #$FF
				pha
				
				ldy #0

.1				inx
				bne .2
				pla
				inc
				beq .8
				
				pha
				
.2				lda (ZPTmpPtr2)
				sta (ZPDataOutPtr),y
				iny
				bne .3
				inc ZPDataOutPtr+1

.3				inc ZPTmpPtr2
				bne .4
				inc ZPTmpPtr2+1
				
.4				inc SKT.TCBCache+S.TCB.OUTTAILNEXT
				bne .1
				inc SKT.TCBCache+S.TCB.OUTTAILNEXT+1
				lda SKT.TCBCache+S.TCB.OUTTAILNEXT+1
				cmp /K.TCP.WSIZE
				bne .1
				stz SKT.TCBCache+S.TCB.OUTTAILNEXT+1
				
				lda ZPTmpPtr1			Dst Ptr=Buffer Base
				sta ZPTmpPtr2
				lda ZPTmpPtr1+1
				sta ZPTmpPtr2+1
				bra .1

.8				lda SKT.TCBCache+S.TCB.OUTTOSEND
				sec
				sbc ZPDataOutLen
				sta SKT.TCBCache+S.TCB.OUTTOSEND
				lda SKT.TCBCache+S.TCB.OUTTOSEND+1
				sbc ZPDataOutLen+1
				sta SKT.TCBCache+S.TCB.OUTTOSEND+1
				
				clc
				rts
*--------------------------------------
* From TCP.IN
* Src : A,X
* Dst : hOutMem/OUTTAIL
*--------------------------------------
SKT.AckDataToSktOut
				ldy #S.TCP.ACKNUM+3		Get new ACK number from FrameIn...
				ldx #3					Substract old ACK from socket

				sec

.1				lda (ZPFrameInPtr),y
				pha
				sbc SKT.TCBCache+S.TCB.OUTSEQNUM,x
				sta TmpDWord,x
				pla						....and Set SEQ = new SEQ
				sta SKT.TCBCache+S.TCB.OUTSEQNUM,x
				dey
				dex
				bpl .1
				
				lda TmpDWord+3
				ldx TmpDWord+2
				bne .2
				tay
				beq .8
				
.2				clc
				adc SKT.TCBCache+S.TCB.OUTTAIL
				sta SKT.TCBCache+S.TCB.OUTTAIL
				
				txa
				adc SKT.TCBCache+S.TCB.OUTTAIL+1
				and /K.TCP.WSIZE-1
				sta SKT.TCBCache+S.TCB.OUTTAIL+1

				lda SKT.TCBCache+S.TCB.OUTFREE
				clc
				adc TmpDWord+3
				sta SKT.TCBCache+S.TCB.OUTFREE
				lda SKT.TCBCache+S.TCB.OUTFREE+1
				adc TmpDWord+2
				sta SKT.TCBCache+S.TCB.OUTFREE+1
				
				lda SKT.TCBCache+S.TCB.OUTUSED
				sec
				sbc TmpDWord+3
				sta SKT.TCBCache+S.TCB.OUTUSED
				lda SKT.TCBCache+S.TCB.OUTUSED+1
				sbc TmpDWord+2
				sta SKT.TCBCache+S.TCB.OUTUSED+1
								
.8				rts
*--------------------------------------
SKT.NewTCB		>LDYAI S.TCB
				>SYSCALL GetMem0YA
				bcs .9
				
				>STYA .4+1
				txa

				ldy #S.SOCKET.SQ.hTCB
				sta (ZPTmpPtr3),y

				lda #K.TCP.WSIZE
				sta SKT.TCBCache+S.TCB.INFREE
				sta SKT.TCBCache+S.TCB.OUTFREE
				lda /K.TCP.WSIZE
				sta SKT.TCBCache+S.TCB.INFREE+1
				sta SKT.TCBCache+S.TCB.OUTFREE+1

				ldx #3
				
.2				lda A2osX.TIMER16,x
				sta SKT.TCBCache+S.TCB.OUTNEXTSEQ,x
				dex
				bpl .2
				
				>LDYAI K.TCP.WSIZE
				>SYSCALL GetMemYA
				bcs .9
				txa
				
				ldy #S.SOCKET.SQ.hInMem
				sta (ZPTmpPtr3),y
				
				>LDYAI K.TCP.WSIZE
				>SYSCALL GetMemYA
				bcs .9
				txa
				
				ldy #S.SOCKET.SQ.hOutMem
				sta (ZPTmpPtr3),y

				ldx #S.TCB-1
				
.3				lda SKT.TCBCache,x
.4				sta $ffff,x
				dex
				bpl .3
				
				clc
.9				rts
*--------------------------------------
SKT.GetTCB	 	ldy #S.SOCKET.SQ.hTCB
				lda (ZPPtrSKT),y
				>SYSCALL GetMemPtrA
				bcs *
				>STYA .1+1
				
				ldx #S.TCB-1
				
.1				lda $ffff,x
				sta SKT.TCBCache,x
				dex
				bpl .1
				rts
*--------------------------------------
SKT.StoreTCB 	ldy #S.SOCKET.SQ.hTCB
				lda (ZPPtrSKT),y
				>SYSCALL GetMemPtrA
				bcs *
				>STYA .2+1
				
				ldx #S.TCB-1
				
.1				lda SKT.TCBCache,x
.2				sta $ffff,x
				dex
				bpl .1
				rts
*--------------------------------------
SKT.Destroy		ldy #S.SOCKET.SQ.hOutMem
				lda (ZPPtrSKT),y
				beq .1
				>SYSCALL FreeMemA
				
.1				ldy #S.SOCKET.SQ.hInMem
				lda (ZPPtrSKT),y
				beq .2
				>SYSCALL FreeMemA
				
.2				ldy #S.SOCKET.SQ.hTCB
				lda (ZPPtrSKT),y
				beq .3
				>SYSCALL FreeMemA				

.3				lda #0
				sta (ZPPtrSKT)
				clc
				rts
*--------------------------------------
SKT.SetFrameOutDstIP
				ldy #S.SOCKET.DST.ADDR
				ldx #4
				
.1				lda (ZPPtrSKT),y
				pha
				iny
				dex
				bne .1
				
				ldy #S.IP.DST+3
				ldx #4
				
.2				pla
				sta (ZPFrameOutPtr),y
				dey
				dex
				bne .2
				rts
*--------------------------------------
SKT.CopyDataInToOut
				lda ZPDataInPtr+1
				pha
				lda ZPDataOutPtr+1
				pha
				
				lda ZPDataInLen
				eor #$ff
				tax
				lda ZPDataInLen+1
				eor #$ff
				pha

				ldy #0
				
.1				inx
				bne .2
				pla
				inc
				beq .9
				pha
				
.2				lda (ZPDataInPtr),y
				sta (ZPDataOutPtr),y
				iny
				bne .1
				inc ZPDataInPtr+1
				inc ZPDataOutPtr+1
				bne .1
				
.9				pla
				sta ZPDataOutPtr+1
				pla
				sta ZPDataInPtr+1
				rts
*--------------------------------------
MAN
SAVE /A2OSX.SRC/LIB/LIBTCPIP.S.SKT
LOAD /A2OSX.SRC/LIB/LIBTCPIP.S
ASM