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https://github.com/A2osX/A2osX.git
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307 lines
5.5 KiB
Plaintext
307 lines
5.5 KiB
Plaintext
PR#3
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PREFIX /A2OSX.BUILD
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LOMEM $A00
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INC 1
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AUTO 6
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.LIST OFF
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*--------------------------------------
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* FRM.New
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* In:
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* Y,A = DataLen
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* X = S.IP.PROTOCOL.xxx
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* Out:
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* Y,A = Frame PTR
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* X = hMem
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*--------------------------------------
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FRM.NewIP stx .8+1
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>STYA ZPDataOutLen
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cpx #S.IP.PROTOCOL.TCP
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bne .1
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lda #S.TCP-2
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bra .4
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.1 cpx #S.IP.PROTOCOL.UDP
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bne .2
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lda #S.UDP-2
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bra .4
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.2 lda #S.IP-2
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bra .4
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.4 sta .5+1 save Header len for reset later
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clc
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adc ZPDataOutLen
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sta ZPFrameOutLen
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pha
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lda #0
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adc ZPDataOutLen+1
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sta ZPFrameOutLen+1
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tax
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pla
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adc #2
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tay
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txa
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adc #0
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>SYSCALL GetMem.YA
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bcs .9
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stx hFrameOut
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>STYA ZPFrameOutPtr
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lda ZPFrameOutLen
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sta (ZPFrameOutPtr)
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ldy #1
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lda ZPFrameOutLen+1
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sta (ZPFrameOutPtr),y
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iny
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.5 ldx #$ff Self Modified, header length
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lda #0
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.6 sta (ZPFrameOutPtr),y
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iny
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dex
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bne .6
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tya
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* clc
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adc ZPFrameOutPtr
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sta ZPDataOutPtr
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lda #0
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adc ZPFrameOutPtr+1
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sta ZPDataOutPtr+1
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lda DevFlags
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and #S.DSTAT.NET.FLAGS.IPOFFLOAD
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bne .7
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ldy #S.ETH.ETHERTYPE
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lda /S.ETH.ETHERTYPE.IP
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sta (ZPFrameOutPtr),y
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iny
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lda #S.ETH.ETHERTYPE.IP
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sta (ZPFrameOutPtr),y
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ldy #S.IP.V.IHL.DSCP.ECN
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lda #$45
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sta (ZPFrameOutPtr),y
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* iny
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* lda #$0
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* sta (ZPFrameOutPtr),y
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* ldy #S.IP.FRAGMENT.FLAGS
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* sta (ZPFrameOutPtr),y
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* iny
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* sta (ZPFrameOutPtr),y
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ldy #S.IP.IDENTIFICATION+1
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lda IP.ID
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ldx IP.ID+1
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inc
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bne .61
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inx
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stx IP.ID+1
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.61 sta IP.ID
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sta (ZPFrameOutPtr),y
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dey
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txa
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sta (ZPFrameOutPtr),y
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ldy #S.IP.TTL
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lda #K.IP.TTL
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sta (ZPFrameOutPtr),y
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.7 ldy #S.IP.PROTOCOL
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.8 lda #$ff
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sta (ZPFrameOutPtr),y
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.9 rts
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*--------------------------------------
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FRM.SendIP ldx #3 Copy SRC.IP even if IP offload
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ldy #S.IP.SRC+3 for proper UDP/TCP CRC calculation
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.1 lda IPCFG+S.IPCFG.IP,x
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sta (ZPFrameOutPtr),y
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dey
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dex
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bpl .1
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lda DevFlags
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and #S.DSTAT.NET.FLAGS.IPOFFLOAD
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bne .21
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ldy #S.IP.TOTAL.LENGTH+1
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lda ZPFrameOutLen
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sec
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sbc #S.ETH-2
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sta (ZPFrameOutPtr),y
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dey
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lda ZPFrameOutLen+1
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sbc /S.ETH-2
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sta (ZPFrameOutPtr),y
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lda #0
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ldy #S.IP.HDR.CHECKSUM
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sta (ZPFrameOutPtr),y
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iny
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sta (ZPFrameOutPtr),y
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stz IP.CHECKSUM RESET.IP.CHECKSUM
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stz IP.CHECKSUM+1
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clc
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ldy #S.IP.V.IHL.DSCP.ECN
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ldx #10 10 words for IP Header
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.2 lda (ZPFrameOutPtr),y
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adc IP.CHECKSUM
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sta IP.CHECKSUM
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iny
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lda (ZPFrameOutPtr),y
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adc IP.CHECKSUM+1
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sta IP.CHECKSUM+1
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iny
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dex
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bne .2
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ldy #S.IP.HDR.CHECKSUM
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lda IP.CHECKSUM
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adc #0
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eor #$FF
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sta (ZPFrameOutPtr),y
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iny
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lda IP.CHECKSUM+1
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adc #0
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eor #$FF
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sta (ZPFrameOutPtr),y
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.21 ldy #S.IP.PROTOCOL
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lda (ZPFrameOutPtr),y
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cmp #S.IP.PROTOCOL.TCP
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bne .3
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jsr TCP.ComputeChecksum
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bra .5
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.3 cmp #S.IP.PROTOCOL.UDP
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bne .4
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lda ZPFrameOutLen
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sec
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sbc #S.IP-2
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ldy #S.UDP.LENGTH+1
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sta (ZPFrameOutPtr),y
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lda ZPFrameOutLen+1
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sbc /S.IP-2
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dey
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sta (ZPFrameOutPtr),y
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jsr UDP.ComputeChecksum
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bra .5
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.4 cmp #S.IP.PROTOCOL.ICMP
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bne .5
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jsr ICMP.ComputeChecksum
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.5 lda DevFlags
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and #S.DSTAT.NET.FLAGS.ARPOFFLOAD
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bne .6
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jsr IP.SetDestMAC
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bcs FRM.Queue
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.6 >LDYA ZPFrameOutPtr
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ldx #DEVMGR.WRITEBLOCK
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jsr NetDevJmp
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bcs FRM.Queue
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lda hFrameOut
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beq .9
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>SYSCALL FreeMem.A
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clc
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.9 rts
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*--------------------------------------
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FRM.Queue ldy hFrameOut no hFrame, cannot queue for retry
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beq .9
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ldx FRM.QUEUE.Head
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inx
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cpx #K.FRMQUEUE.SIZE
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bne .1
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ldx #0
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.1 cpx FRM.QUEUE.Tail
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beq .9
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ldy FRM.QUEUE.Head
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stx FRM.QUEUE.Head
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sta FRM.QUEUE.State,y
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lda #K.FRMSEND.RETRY
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sta FRM.QUEUE.Retry,y
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lda hFrameOut
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sta FRM.QUEUE.hMem,y
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clc
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rts
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.9 sec
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rts
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*--------------------------------------
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FRM.Retry ldx FRM.QUEUE.Tail
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.10 cpx FRM.QUEUE.Head
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beq .8 Queue is empty, exit....
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lda FRM.QUEUE.hMem,x
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>SYSCALL GetMemPtr.A
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>STYA ZPFrameOutPtr
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ldx FRM.QUEUE.Tail
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lda FRM.QUEUE.State,x
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cmp #ERR.DEV+1 Device error ?
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bcc .1 yes, retry sending...
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jsr IP.SetDestMAC Err is ARP or higher, retry getting MAC
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bcs .2 still error getting dest MAC
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.1 >LDYA ZPFrameOutPtr try sending again to DRV
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ldx #DEVMGR.WRITEBLOCK
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jsr NetDevJmp
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bcc .3
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.2 ldx FRM.QUEUE.Tail save error...
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sta FRM.QUEUE.State,x
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dec FRM.QUEUE.Retry,x
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bne .8 exit....until next run!
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.3 ldx FRM.QUEUE.Tail Success,or max retry, discard entry
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lda FRM.QUEUE.hMem,x
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>SYSCALL FreeMem.A
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.4 ldx FRM.QUEUE.Tail
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inx
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cpx #K.FRMQUEUE.SIZE
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bne .5
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ldx #0
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.5 stx FRM.QUEUE.Tail
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bra .10
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.8 rts
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*--------------------------------------
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MAN
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SAVE /A2OSX.SRC/LIB/LIBTCPIP.S.FRM
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LOAD /A2OSX.SRC/LIB/LIBTCPIP.S
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ASM
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