A2osX/LIB/LIBTCPIP.S.FRM.txt
2020-03-23 08:08:27 +01:00

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NEW
AUTO 3,1
.LIST OFF
*--------------------------------------
FRM.GetTargetSKT.TCPUDP
ldy #S.TCPUDP.SRCPORT
lda (ZPFrameInPtr),y
sta SKT.REM.ADDR+S.SOCKADDR.PORT+1
iny
lda (ZPFrameInPtr),y
sta SKT.REM.ADDR+S.SOCKADDR.PORT
iny #S.TCPUDP.DSTPORT
lda (ZPFrameInPtr),y
sta SKT.LOC.ADDR+S.SOCKADDR.PORT+1
iny
lda (ZPFrameInPtr),y
sta SKT.LOC.ADDR+S.SOCKADDR.PORT
FRM.GetTargetSKT.RAW
ldy #S.IP.SRC+3
ldx #3
.1 lda (ZPFrameInPtr),y
sta SKT.REM.ADDR+S.SOCKADDR.ADDR,x
dey
dex
bpl .1
ldy #S.IP.DST+3
ldx #3
.2 lda (ZPFrameInPtr),y
sta SKT.LOC.ADDR+S.SOCKADDR.ADDR,x
dey
dex
bpl .2
rts
*--------------------------------------
* FRM.NewIP
* In:
* Y,A = DataLen
* X = S.IP.PROTOCOL.xxx
* Out:
* Y,A = Frame PTR
* X = hMem
*--------------------------------------
FRM.NewIP stx .8+1
>STYA ZPDataOutLen
cpx #S.IP.PROTOCOL.TCP
bne .1
lda #S.TCP
bra .4
.1 cpx #S.IP.PROTOCOL.UDP
bne .2
lda #S.UDP
bra .4
.2 lda #S.IP
.4 sta .5+1 save Header len for reset later
clc
adc ZPDataOutLen
sta ZPFrameOutLen
tay
lda #0
adc ZPDataOutLen+1
sta ZPFrameOutLen+1
>SYSCALL2 getmem
bcs .9
stx hFrameOut
>STYA ZPFrameOutPtr
ldy #0
.5 ldx #$ff Self Modified, header length
lda #0
.6 sta (ZPFrameOutPtr),y
iny
dex
bne .6
tya
* clc
adc ZPFrameOutPtr
sta ZPDataOutPtr
lda #0
adc ZPFrameOutPtr+1
sta ZPDataOutPtr+1
lda IPCFG+S.NETCFG.DevFlags
and #S.DCB.NIC.FLAGS.IPOFFLOAD
bne .7
ldy #S.ETH.EII.TYPE
lda /S.ETH.EII.TYPE.IP
sta (ZPFrameOutPtr),y
iny
lda #S.ETH.EII.TYPE.IP
sta (ZPFrameOutPtr),y
ldy #S.IP.V.IHL.DSCP.ECN
lda #$45
sta (ZPFrameOutPtr),y
* iny
* lda #$0
* sta (ZPFrameOutPtr),y
* ldy #S.IP.FRAGMENT.FLAGS
* sta (ZPFrameOutPtr),y
* iny
* sta (ZPFrameOutPtr),y
ldy #S.IP.IDENTIFICATION+1
lda IP.ID
ldx IP.ID+1
inc
bne .61
inx
stx IP.ID+1
.61 sta IP.ID
sta (ZPFrameOutPtr),y
dey
txa
sta (ZPFrameOutPtr),y
ldy #S.IP.TTL
lda #K.IP.TTL
sta (ZPFrameOutPtr),y
.7 ldy #S.IP.PROTOCOL
.8 lda #$ff
sta (ZPFrameOutPtr),y
.9 rts
*--------------------------------------
* clc Queue if fail
* sec DONT Queue if fail
*--------------------------------------
FRM.SendIP php
ldx #3 Copy SRC.IP even if IP offload
ldy #S.IP.SRC+3 for proper UDP/TCP CRC calculation
.1 lda IPCFG+S.IPCFG.IP,x
sta (ZPFrameOutPtr),y
dey
dex
bpl .1
lda IPCFG+S.NETCFG.DevFlags
and #S.DCB.NIC.FLAGS.IPOFFLOAD
bne .21
ldy #S.IP.TOTAL.LENGTH+1
lda ZPFrameOutLen
sec
sbc #S.ETH.EII
sta (ZPFrameOutPtr),y
dey
lda ZPFrameOutLen+1
sbc /S.ETH.EII
sta (ZPFrameOutPtr),y
lda #0
ldy #S.IP.HDR.CHECKSUM
sta (ZPFrameOutPtr),y
iny
sta (ZPFrameOutPtr),y
stz IP.CHECKSUM RESET IP CHECKSUM
stz IP.CHECKSUM+1
clc
ldy #S.IP.V.IHL.DSCP.ECN
ldx #10 10 words for IP Header
.2 lda (ZPFrameOutPtr),y
adc IP.CHECKSUM
sta IP.CHECKSUM
iny
lda (ZPFrameOutPtr),y
adc IP.CHECKSUM+1
sta IP.CHECKSUM+1
iny
dex
bne .2
ldy #S.IP.HDR.CHECKSUM
lda IP.CHECKSUM
adc #0
eor #$FF
sta (ZPFrameOutPtr),y
iny
lda IP.CHECKSUM+1
adc #0
eor #$FF
sta (ZPFrameOutPtr),y
.21 ldy #S.IP.PROTOCOL
lda (ZPFrameOutPtr),y
cmp #S.IP.PROTOCOL.TCP
bne .3
jsr IP.ComputeTCPChecksum
bra .5
.3 cmp #S.IP.PROTOCOL.UDP
bne .4
lda ZPFrameOutLen
sec
sbc #S.IP
ldy #S.UDP.LENGTH+1
sta (ZPFrameOutPtr),y
lda ZPFrameOutLen+1
sbc /S.IP
dey
sta (ZPFrameOutPtr),y
jsr IP.ComputeUDPChecksum
bra .5
.4 cmp #S.IP.PROTOCOL.ICMP
bne .5
jsr IP.ComputeICMPChecksum
.5 lda IPCFG+S.NETCFG.DevFlags
and #S.DCB.NIC.FLAGS.ARPOFFLOAD
bne .6
jsr IP.SetDestMAC
bcs FRM.Queue
.6 jsr FRM.Send
bcs FRM.Queue
jsr FRM.Discard
plp
clc
rts
*--------------------------------------
FRM.Queue plp
bcs FRM.Discard DONT queue
ldy hFrameOut no hFrame, cannot queue for retry
beq FRM.Discard.9
ldx FRM.QUEUE.Head
inx
cpx #K.FRMQUEUE.SIZE
bne .1
ldx #0
.1 cpx FRM.QUEUE.Tail
beq FRM.Discard CS
ldy FRM.QUEUE.Head
stx FRM.QUEUE.Head
sta FRM.QUEUE.State,y
lda #K.FRMSEND.RETRY
sta FRM.QUEUE.Retry,y
lda hFrameOut
sta FRM.QUEUE.hMem,y
lda ZPFrameOutLen
sta FRM.QUEUE.LenL,y
lda ZPFrameOutLen+1
sta FRM.QUEUE.LenH,y
clc
.9 rts
*--------------------------------------
FRM.Discard lda hFrameOut
beq FRM.Discard.9
stz hFrameOut
>SYSCALL2 FreeMem
FRM.Discard.9 sec
rts
*--------------------------------------
FRM.Retry ldx FRM.QUEUE.Tail
.1 cpx FRM.QUEUE.Head
beq .8 Queue is empty, exit...
lda FRM.QUEUE.LenL,x
sta ZPFrameOutLen
lda FRM.QUEUE.LenH,x
sta ZPFrameOutLen+1
lda FRM.QUEUE.hMem,x
>SYSCALL2 GetMemPtr
>STYA ZPFrameOutPtr
ldx FRM.QUEUE.Tail
lda FRM.QUEUE.State,x
cmp #ERR.ARP.PENDING
bne .2
jsr IP.SetDestMAC Err is ARP or higher, retry getting MAC
bcs .3 still error getting dest MAC
.2 jsr FRM.Send try sending again to DRV
bcc .4
.3 ldx FRM.QUEUE.Tail
sta FRM.QUEUE.State,x save error...
dec FRM.QUEUE.Retry,x
bne .8 exit....until next run!
.4 ldx FRM.QUEUE.Tail
lda FRM.QUEUE.hMem,x Success,or max retry, discard entry
inx
cpx #K.FRMQUEUE.SIZE
bne .5
ldx #0
.5 stx FRM.QUEUE.Tail
>SYSCALL2 FreeMem
bra FRM.Retry
.8 rts
*--------------------------------------
FRM.Send ldx #3
.1 lda ZPFrameOutPtr,x Get Frame Ptr & Len
sta IOCTL+S.IOCTL.BUFPTR,x
dex
bpl .1
FRM.Send.IOCTL >PUSHB IPCFG+S.NETCFG.DevID
>PUSHBI IOCTL.WRITE
>PUSHW L.IOCTL
>SYSCALL2 IOCTL
rts
*--------------------------------------
FRM.DiscardIn lda hFrameIn
beq .8
stz hFrameIn
>SYSCALL2 FreeMem
.8 clc
rts
*--------------------------------------
MAN
SAVE USR/SRC/LIB/LIBTCPIP.S.FRM
LOAD USR/SRC/LIB/LIBTCPIP.S
ASM