mirror of
https://github.com/A2osX/A2osX.git
synced 2024-11-25 20:33:13 +00:00
269 lines
5.0 KiB
Plaintext
269 lines
5.0 KiB
Plaintext
PR#3
|
||
PREFIX /A2OSX.SRC
|
||
NEW
|
||
INC 1
|
||
AUTO 6
|
||
.LIST OFF
|
||
.OP 65C02
|
||
*--------------------------------------
|
||
* ARP.CLEAR
|
||
*--------------------------------------
|
||
ARP.CLEAR ldx #K.ARPCACHE.SIZE*S.ARPCACHE
|
||
.1 stz ARP.CACHE-1,x
|
||
dex
|
||
bne .1
|
||
clc
|
||
rts
|
||
*--------------------------------------
|
||
* ARP.QUERY
|
||
* In:
|
||
* PULLW PTR to IP
|
||
* PULLW PTR to MAC (to fill)
|
||
* Out:
|
||
* CC: hit: MAC filled
|
||
* CS: missed
|
||
*--------------------------------------
|
||
ARP.QUERY >PULLW ZPARPIP IP
|
||
>PULLW ZPARPMAC MAC
|
||
jmp ARP.QUERY.I
|
||
*--------------------------------------
|
||
* ARP.ADD
|
||
* In:
|
||
* PULLW PTR to IP
|
||
* PULLW PTR to MAC
|
||
*--------------------------------------
|
||
ARP.ADD >PULLW ZPARPIP IP
|
||
>PULLW ZPARPMAC MAC
|
||
lda #S.ARPCACHE.STATUS.RESOLVED
|
||
jmp ARP.ADD.I
|
||
*--------------------------------------
|
||
* ARP.GETCACHE
|
||
* Out:
|
||
* Y,A = PTR to ARP.CACHE
|
||
*--------------------------------------
|
||
ARP.GETCACHE >LDYA L.ARP.CACHE
|
||
clc
|
||
rts
|
||
*--------------------------------------
|
||
* PRIVATE
|
||
*--------------------------------------
|
||
ARP.RESOLVE ldy #S.IP.DST
|
||
lda (ZPFrameBase1),y
|
||
iny
|
||
.1 and (ZPFrameBase1),y
|
||
iny
|
||
cpy #S.IP.DST+4
|
||
bne .1
|
||
cmp #$FF
|
||
bne .3 not a broadcast....
|
||
|
||
ldy #S.ETH.DSTMAC
|
||
.2 sta (ZPFrameBase1),y
|
||
iny
|
||
cpy #S.ETH.DSTMAC+6
|
||
bne .2
|
||
clc
|
||
rts
|
||
|
||
.3 ldy #S.IP.DST+3
|
||
ldx #3
|
||
.4 lda (ZPFrameBase1),y
|
||
eor IPCFG+S.IPCFG.IP,x
|
||
and IPCFG+S.IPCFG.MASK,x
|
||
bne .5
|
||
dey
|
||
dex
|
||
bpl .4
|
||
|
||
lda ZPFrameBase1 Same network, query ARP for dest IP
|
||
clc
|
||
adc #S.IP.DST
|
||
sta ZPARPIP
|
||
lda ZPFrameBase1+1
|
||
adc /S.IP.DST
|
||
sta ZPARPIP+1
|
||
bra .6
|
||
|
||
.5 lda L.IPCFG Not Same network, query ARP for GW
|
||
clc
|
||
adc #S.IPCFG.GW
|
||
sta ZPARPIP
|
||
lda L.IPCFG+1
|
||
adc /S.IPCFG.GW
|
||
sta ZPARPIP+1
|
||
|
||
.6 lda ZPFrameBase1
|
||
clc
|
||
adc #S.ETH.DSTMAC
|
||
sta ZPARPMAC
|
||
lda ZPFrameBase1+1
|
||
adc /S.ETH.DSTMAC
|
||
sta ZPARPMAC+1
|
||
*--------------------------------------
|
||
ARP.QUERY.I ldx #0
|
||
|
||
.1 phx
|
||
lda ARP.CACHE,x
|
||
beq .5 empty ARP Cache entry, try next...
|
||
|
||
ldy #0
|
||
.2 lda ARP.CACHE+S.ARPCACHE.IP,x
|
||
cmp (ZPARPIP),y
|
||
bne .5 wrong IP, try next...
|
||
inx
|
||
iny
|
||
cpy #4
|
||
bne .2
|
||
|
||
plx
|
||
lda ARP.CACHE,x get back status
|
||
bpl .4 Pending...
|
||
|
||
ldy #0 already resolved, get MAC
|
||
.3 lda ARP.CACHE+S.ARPCACHE.MAC,x
|
||
sta (ZPARPMAC),y
|
||
inx
|
||
iny
|
||
cpy #6
|
||
bne .3
|
||
clc
|
||
rts
|
||
|
||
.4 inc ARP.CACHE+S.ARPCACHE.RETRYCNT,x Pending, increase Retry Count
|
||
bne .41
|
||
stz ARP.CACHE,x reached max retry,mark as free
|
||
.41 sec
|
||
rts
|
||
|
||
.5 pla
|
||
clc
|
||
adc #S.ARPCACHE
|
||
tax
|
||
cmp #K.ARPCACHE.SIZE*S.ARPCACHE
|
||
bne .1
|
||
|
||
jsr NEW.ARP.FRAME nothing in ARP cache, send ARP request
|
||
bcs .9
|
||
|
||
phx
|
||
ldy #S.ARP.OPERATION+1
|
||
lda #S.ARP.OPERATION.REQ
|
||
sta (ZPFrameBase1),y
|
||
|
||
ldx #5
|
||
ldy #S.ARP.SHA+5
|
||
.71 lda IPCFG+S.IPCFG.MAC,x
|
||
sta (ZPFrameBase1),y
|
||
dey
|
||
dex
|
||
bpl .71
|
||
|
||
ldx #3
|
||
ldy #S.ARP.SPA+3
|
||
.72 lda IPCFG+S.IPCFG.IP,x
|
||
sta (ZPFrameBase1),y
|
||
dey
|
||
dex
|
||
bpl .72
|
||
|
||
ldy #3
|
||
.73 lda (ZPARPIP),y
|
||
pha
|
||
dey
|
||
bpl .73
|
||
|
||
ldy #S.ARP.TPA
|
||
.74 pla
|
||
sta (ZPFrameBase1),y
|
||
iny
|
||
cpy #S.ARP.TPA+4
|
||
bne .74
|
||
|
||
lda #255
|
||
ldy #S.ETH.DSTMAC
|
||
.75 sta (ZPFrameBase1),y
|
||
iny
|
||
cpy #S.ETH.DSTMAC+6
|
||
bne .75
|
||
|
||
jsr SEND.ARP.FRAME.I
|
||
|
||
bcs .76
|
||
|
||
jsr ARP.ADD.PENDING ZPARPIP still pointing IP
|
||
|
||
.76 pla
|
||
>SYSCALL SYS.FreeMemA
|
||
|
||
sec
|
||
.9 rts
|
||
*--------------------------------------
|
||
ARP.ADD.PENDING lda #S.ARPCACHE.STATUS.PENDING
|
||
|
||
ARP.ADD.I sta Status
|
||
|
||
ldx #0
|
||
.1 lda ARP.CACHE,x get status
|
||
beq .7 empty ARP cache entry
|
||
|
||
phx
|
||
|
||
ldy #0
|
||
.2 lda (ZPARPIP),y
|
||
cmp ARP.CACHE+S.ARPCACHE.IP,x
|
||
bne .4
|
||
inx
|
||
iny
|
||
cpy #4
|
||
bne .2
|
||
plx
|
||
bra .7 same IP,update MAC
|
||
|
||
.4 pla get back index in ARP.CACHE
|
||
clc
|
||
adc #S.ARPCACHE
|
||
cmp #K.ARPCACHE.SIZE*S.ARPCACHE
|
||
beq .5 Cache is full ?
|
||
tax
|
||
bra .1
|
||
|
||
.5 ldx #K.ARPCACHE.SIZE*S.ARPCACHE-S.ARPCACHE
|
||
|
||
.6 lda ARP.CACHE+S.ARPCACHE-1,x
|
||
sta ARP.CACHE-1,x
|
||
dex
|
||
bne .6
|
||
|
||
ldx #K.ARPCACHE.SIZE*S.ARPCACHE-S.ARPCACHE
|
||
|
||
.7 lda Status
|
||
sta ARP.CACHE,x mark ARP entry Status
|
||
inx
|
||
stz ARP.CACHE,x Init retry count
|
||
inx
|
||
ldy #0
|
||
.8 lda (ZPARPIP),y store IP in cache
|
||
sta ARP.CACHE,x
|
||
inx
|
||
iny
|
||
cpy #4
|
||
bne .8
|
||
|
||
lda Status
|
||
bpl .82 no MAC if "pending"
|
||
|
||
ldy #0
|
||
.81 lda (ZPARPMAC),y store MAC in cache
|
||
sta ARP.CACHE,x
|
||
inx
|
||
iny
|
||
cpy #6
|
||
bne .81
|
||
.82 clc
|
||
rts
|
||
*--------------------------------------
|
||
MAN
|
||
SAVE LIB/LIBTCPIP.S.ARP
|
||
LOAD LIB/LIBTCPIP.S
|
||
ASM
|