mirror of
https://github.com/A2osX/A2osX.git
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115 lines
2.2 KiB
Plaintext
115 lines
2.2 KiB
Plaintext
NEW
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PREFIX /A2OSX.BUILD
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AUTO 4,1
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.LIST OFF
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*--------------------------------------
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ICMP.IN ldy #S.ICMP.TYPE
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lda (ZPFrameInPtr),y
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cmp #S.ICMP.TYPE.ECHOREP
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beq ICMP.IN.ECHOREP
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cmp #S.ICMP.TYPE.ECHOREQ
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bne ICMP.IN.EXIT
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*--------------------------------------
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ICMP.IN.ECHOREQ ldy #S.IP.DST+3
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ldx #3
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.1 lda (ZPFrameInPtr),y
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cmp IPCFG+S.IPCFG.IP,x
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bne ICMP.IN.EXIT
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dey
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dex
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bne .1
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ldy #S.ICMP.TYPE
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lda #S.ICMP.TYPE.ECHOREP
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sta (ZPFrameInPtr),y
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jsr ARP.AddFromFrameInPtr
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lda hFrameIn
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stz hFrameIn DO NOT DISCARD this frame,it is SOURCE frame!!!
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sta hFrameOut
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>LDYA ZPFrameInPtr
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>STYA ZPFrameOutPtr
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ldx #3
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ldy #S.IP.DST+3
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.3 lda ARP.TmpCache+S.ARPCACHE.IP,x
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sta (ZPFrameOutPtr),y
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dey
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dex
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bpl .3
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jmp FRM.SendIP
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ICMP.IN.EXIT lda hFrameIn
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beq .8
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>SYSCALL FreeMem
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stz hFrameIn
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.8 rts
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*--------------------------------------
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ICMP.IN.ECHOREP jsr IP.FillSKT.TemplateSrcDstIP
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lda #S.IP.PROTOCOL.ICMP
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sta SKT.Template+S.SOCKET.RAW.PROTO
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ldy #S.ICMP.IDENTIFIER
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lda (ZPFrameInPtr),y
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sta SKT.Template+S.SOCKET.DST.PORT+1
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iny
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lda (ZPFrameInPtr),y
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sta SKT.Template+S.SOCKET.DST.PORT
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lda hSocketTable
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>SYSCALL GetMemPtr
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>STYA ZPPtrSKT
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ldx #0
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.3 lda (ZPPtrSKT)
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beq .7
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cmp #S.SOCKET.T.RAW
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bne .7
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ldy #S.SOCKET.SRC.ADDR
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.4 lda (ZPPtrSKT),y
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cmp SKT.Template,y
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bne .7
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iny
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cpy #S.SOCKET.SRC.PORT
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bne .5
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iny
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iny
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.5 cpy #S.SOCKET.DST.PORT Compare SRC.ADDR,DST.ADDR,DST.PORT
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bne .4
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lda hFrameIn
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jsr SKT.AddToQueueA
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bcs ICMP.IN.EXIT Q full, discard...
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rts DO NOT Discard this queued frame
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.7 lda ZPPtrSKT
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clc
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adc #S.SOCKET
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sta ZPPtrSKT
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bcc .8
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inc ZPPtrSKT+1
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.8 inx
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cpx #K.SKTTABLE.SIZE
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bne .3
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bra ICMP.IN.EXIT
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*--------------------------------------
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MAN
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SAVE /A2OSX.SRC/LIB/LIBTCPIP.S.ICMP
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LOAD /A2OSX.SRC/LIB/LIBTCPIP.S
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ASM
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