mirror of https://github.com/A2osX/A2osX.git
369 lines
6.4 KiB
Plaintext
369 lines
6.4 KiB
Plaintext
NEW
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AUTO 3,1
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*/--------------------------------------
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* # ARP.Clear
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* Clear ARP Cache
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* ## ASM
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* ## RETURN VALUE
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*\--------------------------------------
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ARP.Clear jsr ARP.GetCache
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ARP.Clear.I lda #0
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tay
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.2 sta (ZPCachePtr),y
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iny
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cpy #K.ARPCACHE.SIZE*S.ARPCACHE
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bne .2
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clc
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.9 rts
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*/--------------------------------------
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* # ARP.Query
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* Query ARP Cache and returns HW address
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* ## ASM
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* PUSHW PTR to MAC (to fill)
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* PUSHW PTR to IP
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* ## RETURN VALUE
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* CC: hit: MAC filled
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* CS: missed
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*\--------------------------------------
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ARP.Query jsr ARP.GetIP
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>PULLW ZPPtrMAC MAC
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jsr ARP.QUERY.I
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bcs .9
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ldy #5
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.2 lda ARP.TmpCache+S.ARPCACHE.MAC,y
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sta (ZPPtrMAC),y
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dey
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bpl .2
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* clc
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.9 rts
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*/--------------------------------------
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* # ARP.Add
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* Add a static ARP cache record
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* ## ASM
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* PUSHW PTR to MAC
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* PUSHW PTR to IP
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*\--------------------------------------
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ARP.Add jsr ARP.GetIP
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>PULLW ZPPtrMAC MAC
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ldy #5
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.2 lda (ZPPtrMAC),y
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sta ARP.TmpCache+S.ARPCACHE.MAC,y
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dey
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bpl .2
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stz ARP.TmpCache+S.ARPCACHE.TTL
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stz ARP.TmpCache+S.ARPCACHE.TTL+1
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lda #S.ARPCACHE.S.RESOLVED+S.ARPCACHE.S.STATIC
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ARP.ADD.I sta ARP.TmpCache
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jsr ARP.FIND.BY.IP
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bcc .1
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jsr ARP.FIND.FREE
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.1 ldy #S.ARPCACHE-1
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.2 lda ARP.TmpCache,y
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sta (ZPCachePtr),y
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dey
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bpl .2
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clc
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rts
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*/--------------------------------------
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* # ARP.GetCache
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* Return a Ptr to ARP Cache Table
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* ## ASM
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* ## RETURN VALUE
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* Y,A = PTR to ARP.CACHE
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*\--------------------------------------
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ARP.GetCache lda hARPCache
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>SYSCALL2 GetMemPtr
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bcs .9
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>STYA ZPCachePtr
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.9 rts
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*--------------------------------------
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* PRIVATE
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*--------------------------------------
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ARP.IN ldy #S.ARP.TPA+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 ARP.IN.EXIT
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dey
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dex
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bpl .1
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ldy #S.ARP.OPERATION+1 HI byte
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lda (ZPFrameInPtr),y
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cmp #S.ARP.OPERATION.REQ
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beq ARP.IN.REQ
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cmp #S.ARP.OPERATION.REP
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beq ARP.IN.REP
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ARP.IN.EXIT jmp FRM.DiscardIn
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ARP.IN.REQ ldy #S.ARP.SPA+3
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ldx #3
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.1 lda (ZPFrameInPtr),y
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sta ARP.REP.TPA,x
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dey
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dex
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bpl .1
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ldy #S.ARP.SHA+5
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ldx #5
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.2 lda (ZPFrameInPtr),y
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sta ARP.REP.DSTMAC,x
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sta ARP.REP.THA,x
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dey
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dex
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bpl .2
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>LDYA L.ARP.REP
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jsr ARP.Send
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bra ARP.IN.EXIT
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ARP.IN.REP lda #K.ARP.TTL
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sta ARP.TmpCache+S.ARPCACHE.TTL
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lda /K.ARP.TTL
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sta ARP.TmpCache+S.ARPCACHE.TTL+1
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ldy #S.ARP.SPA+3
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jsr ARP.GetIPFromFrameInPtrY
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ldy #S.ARP.SHA+5
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jsr ARP.GetMacFromFrameInPtrY
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lda #S.ARPCACHE.S.RESOLVED
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jsr ARP.ADD.I
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bra ARP.IN.EXIT
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*--------------------------------------
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ARP.QUERY.I jsr ARP.FIND.BY.IP
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bcs .3 send an ARP request
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lda (ZPCachePtr) get status...
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bpl .9 Pending...
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ldy #S.ARPCACHE.MAC
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.2 lda (ZPCachePtr),y
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sta ARP.TmpCache,y
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iny
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cpy #S.ARPCACHE.MAC+6
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bne .2
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ldy #S.ARPCACHE.TTL
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lda #K.ARP.TTL
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sta (ZPCachePtr),y
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iny
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lda /K.ARP.TTL
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sta (ZPCachePtr),y
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clc
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rts
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.3 ldx #3
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.4 lda ARP.TmpCache+S.ARPCACHE.IP,x
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sta ARP.REQ.TPA,x
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dex
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bpl .4
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>LDYA L.ARP.REQ
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jsr ARP.Send
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bcs .99
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lda #K.ARP.PENDING.TTL
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sta ARP.TmpCache+S.ARPCACHE.TTL
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stz ARP.TmpCache+S.ARPCACHE.TTL+1
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lda #S.ARPCACHE.S.PENDING
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jsr ARP.ADD.I
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.9 lda #ERR.ARP.PENDING
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sec
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.99 rts
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*--------------------------------------
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ARP.FIND.BY.IP jsr ARP.GetCache
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ldx #K.ARPCACHE.SIZE
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.1 lda (ZPCachePtr)
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beq .3
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ldy #S.ARPCACHE.IP
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.2 lda ARP.TmpCache,y
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cmp (ZPCachePtr),y
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bne .3
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iny
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cpy #S.ARPCACHE.IP+4
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bne .2
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clc
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rts
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.3 jsr ARP.NextCache
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dex
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bne .1
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sec
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rts
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*--------------------------------------
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ARP.FIND.FREE jsr ARP.GetCache
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lda #$ff
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sta TmpDWord
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sta TmpDWord+1
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ldx #K.ARPCACHE.SIZE
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.1 lda (ZPCachePtr)
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beq .8
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bpl .6
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ldy #S.ARPCACHE.TTL
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lda (ZPCachePtr),y
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sec
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sbc TmpDWord
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iny
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lda (ZPCachePtr),y
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sbc TmpDWord+1
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bcc .6
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lda (ZPCachePtr),y
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sta TmpDWord+1
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dey
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lda (ZPCachePtr),y
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sta TmpDWord
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>LDYA ZPCachePtr
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>STYA ZPTmpPtr1 save lowest TTL slot ...
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.6 jsr ARP.NextCache
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dex
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bne .1
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>LDYA ZPTmpPtr1
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>STYA ZPCachePtr
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lda #0
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sta (ZPCachePtr)
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.8 clc
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rts
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*--------------------------------------
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ARP.EXPIRE jsr ARP.GetCache
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ldx #K.ARPCACHE.SIZE
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.1 lda (ZPCachePtr)
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beq .2
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and #S.ARPCACHE.S.STATIC
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bne .2
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ldy #S.ARPCACHE.TTL
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sec
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lda (ZPCachePtr),y
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sbc #1
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sta (ZPCachePtr),y
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iny
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lda (ZPCachePtr),y
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sbc #0
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sta (ZPCachePtr),y
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bcs .2
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lda #0
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sta (ZPCachePtr)
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.2 jsr ARP.NextCache
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dex
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bne .1
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rts
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*--------------------------------------
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ARP.NextCache lda ZPCachePtr
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clc
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adc #S.ARPCACHE
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sta ZPCachePtr
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bcc .8
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inc ZPCachePtr+1
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.8 rts
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*--------------------------------------
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ARP.GetIP >PULLW ZPPtrIP
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ldy #3
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.1 lda (ZPPtrIP),y
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sta ARP.TmpCache+S.ARPCACHE.IP,y
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dey
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bpl .1
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rts
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*--------------------------------------
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ARP.AddFromFrameInPtr
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ldy #S.IP.SRC+3
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jsr ARP.GetIPFromFrameInPtrY
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ldy #S.ETH.SRCMAC+5
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jsr ARP.GetMacFromFrameInPtrY
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lda #K.ARP.TTL
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sta ARP.TmpCache+S.ARPCACHE.TTL
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lda /K.ARP.TTL
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sta ARP.TmpCache+S.ARPCACHE.TTL+1
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lda #S.ARPCACHE.S.RESOLVED
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jmp ARP.ADD.I
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*--------------------------------------
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ARP.GetIPFromFrameInPtrY
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ldx #3
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.1 lda (ZPFrameInPtr),y
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sta ARP.TmpCache+S.ARPCACHE.IP,x
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dey
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dex
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bpl .1
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rts
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*--------------------------------------
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ARP.GetMacFromFrameInPtrY
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ldx #5
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.1 lda (ZPFrameInPtr),y
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sta ARP.TmpCache+S.ARPCACHE.MAC,x
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dey
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dex
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bpl .1
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rts
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*--------------------------------------
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ARP.Send >STYA IOCTL+S.IOCTL.BUFPTR
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>LDYAI S.ARP
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>STYA IOCTL+S.IOCTL.BYTECNT
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jmp FRM.Send.IOCTL
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*--------------------------------------
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MAN
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SAVE usr/src/lib/libtcpip.s.arp
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LOAD usr/src/lib/libtcpip.s
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ASM
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