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A2osX/LIB/LIBTCPIP.S.FRM.txt
Rémy GIBERT fe5e44dc5a Kernel version 0.8 : BUGFIX in CD: not processing .. correctly, missing ending / when changing to another volume. BUGFIX in LS:File count missing one. 
Additional Kernel API Documentation
LIBSTR deleted, now Kernel API
2016-10-24 17:54:43 +02:00

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PR#3
PREFIX /A2OSX.SRC
NEW
INC 1
AUTO 6
.LIST OFF
*--------------------------------------
RCVD.FRAMEA sta hFrame1
>SYSCALL GetMemPtrA
>STYA ZPFrameBase1
jsr FRM.GetLen1
ldy #S.ETH.ETHERTYPE
lda (ZPFrameBase1),y
tax
iny
lda (ZPFrameBase1),y
cmp #S.ETH.ETHERTYPE.ARP
bne .1
cpx /S.ETH.ETHERTYPE.ARP
bne .1
jmp ARP.IN
.1 cmp #S.ETH.ETHERTYPE.IP
bne .9
cpx /S.ETH.ETHERTYPE.IP
bne .9
jmp IP.IN
.9 sec
rts
*--------------------------------------
* Out:
* Y,A = Frame PTR
* X = hMem
*--------------------------------------
NEW.ICMP.FRAME jsr NEW.IP.FRAME
bcs .9
ldy #S.IP.PROTOCOL
lda #S.IP.PROTOCOL.ICMP
sta (ZPFrameBase1),y
>LDYA ZPFrameBase1
clc
.9 rts
*--------------------------------------
* Out:
* Y,A = Frame PTR
* X = hMem
*--------------------------------------
NEW.TCP.FRAME jsr NEW.IP.FRAME
bcs .9
ldy #S.IP.PROTOCOL
lda #S.IP.PROTOCOL.TCP
sta (ZPFrameBase1),y
>LDYA ZPFrameBase1
clc
.9 rts
*--------------------------------------
* Out:
* Y,A = Frame PTR
* X = hMem
*--------------------------------------
NEW.UDP.FRAME jsr NEW.IP.FRAME
bcs .9
ldy #S.IP.PROTOCOL
lda #S.IP.PROTOCOL.UDP
sta (ZPFrameBase1),y
>LDYA ZPFrameBase1
clc
.9 rts
*--------------------------------------
* Out:
* Y,A = Frame PTR
* X = hMem
*--------------------------------------
NEW.IP.FRAME >PUSHWI K.ETH.FRAME.LEN
>PUSHBI S.MEM.F.INIT0
>SYSCALL GetMem
bcs .9
>STYA ZPFrameBase1
lda DevFlags
and #S.DEVINFO.NET.FLAGS.IPOFFLOAD
bne .9
ldy #S.ETH.ETHERTYPE
lda /S.ETH.ETHERTYPE.IP
sta (ZPFrameBase1),y
iny
lda #S.ETH.ETHERTYPE.IP
sta (ZPFrameBase1),y
ldy #S.IP.V.IHL.DSCP.ECN
lda #$45
sta (ZPFrameBase1),y
iny
lda #$0
sta (ZPFrameBase1),y
ldy #S.IP.IDENTIFICATION
sta (ZPFrameBase1),y
inc
iny
sta (ZPFrameBase1),y
dec
ldy #S.IP.FRAGMENT.FLAGS
sta (ZPFrameBase1),y
iny
sta (ZPFrameBase1),y
ldy #S.IP.TTL
lda #K.IP.TTL
sta (ZPFrameBase1),y
>LDYA ZPFrameBase1
.9 rts
*--------------------------------------
SEND.ICMP.FRAME >PULLW ZPFrameBase1
jsr FRM.GetLen1
stz hFrame1
SEND.ICMP.FRAME.I
>PUSHW ZPFrameLen1
>PUSHWI S.ICMP.TYPE-2
ldy #S.ICMP.CHECKSUM
lda #0
sta (ZPFrameBase1),y
iny
sta (ZPFrameBase1),y
jsr IP.ComputeChecksum
phy
ldy #S.ICMP.CHECKSUM
sta (ZPFrameBase1),y
iny
pla
sta (ZPFrameBase1),y
bra SEND.IP.FRAME.I
*--------------------------------------
SEND.TCP.FRAME >PULLW ZPFrameBase1
jsr FRM.GetLen1
stz hFrame1
SEND.TCP.FRAME.I
bra SEND.IP.FRAME.I
*--------------------------------------
SEND.UDP.FRAME >PULLW ZPFrameBase1
jsr FRM.GetLen1
stz hFrame1
SEND.UDP.FRAME.I
ldy #S.UDP.LENGTH+1
lda ZPFrameLen1
sec
sbc #S.IP-2
sta (ZPFrameBase1),y
dey
lda ZPFrameLen1+1
sbc /S.IP-2
sta (ZPFrameBase1),y
bra SEND.IP.FRAME.I
*--------------------------------------
SEND.IP.FRAME >PULLW ZPFrameBase1
jsr FRM.GetLen1
stz hFrame1
SEND.IP.FRAME.I ldx #3 Copy SRC.IP even if IP offload
ldy #S.IP.SRC+3 for proper UDP/TCP CRC calculation
.1 lda IPCFG+S.IPCFG.IP,x
sta (ZPFrameBase1),y
dey
dex
bpl .1
lda DevFlags
and #S.DEVINFO.NET.FLAGS.IPOFFLOAD
bne .21
ldy #S.IP.TOTAL.LENGTH+1
lda ZPFrameLen1
sec
sbc #S.ETH-2
sta (ZPFrameBase1),y
dey
lda ZPFrameLen1+1
sbc /S.ETH-2
sta (ZPFrameBase1),y
lda #0
ldy #S.IP.HDR.CHECKSUM
sta (ZPFrameBase1),y
iny
sta (ZPFrameBase1),y
stz IP.CHECKSUM RESET.IP.CHECKSUM
stz IP.CHECKSUM+1
clc
ldy #S.IP.V.IHL.DSCP.ECN
ldx #10 10 words for IP Header
.2 lda (ZPFrameBase1),y
adc IP.CHECKSUM
sta IP.CHECKSUM
iny
lda (ZPFrameBase1),y
adc IP.CHECKSUM+1
sta IP.CHECKSUM+1
iny
dex
bne .2
ldy #S.IP.HDR.CHECKSUM
lda IP.CHECKSUM
adc #0
eor #$FF
sta (ZPFrameBase1),y
iny
lda IP.CHECKSUM+1
adc #0
eor #$FF
sta (ZPFrameBase1),y
.21 ldy #S.IP.PROTOCOL
lda (ZPFrameBase1),y
cmp #S.IP.PROTOCOL.TCP
bne .3
jsr TCP.ComputeChecksum
bra .4
.3 cmp #S.IP.PROTOCOL.UDP
bne .4
jsr UDP.ComputeChecksum
.4 lda DevFlags
and #S.DEVINFO.NET.FLAGS.ARPOFFLOAD
bne .5
jsr IP.SetDestMAC
bcs FRM.Queue
.5 >PUSHW ZPFrameBase1
ldx #DEVMGR.NET.SEND
jsr NetDevJmp
bcs FRM.Queue
lda hFrame1
beq .9
>SYSCALL FreeMemA
clc
.9 rts
*--------------------------------------
FRM.Queue ldy hFrame1 no hFrame, cannot queue for retry
beq .9
ldx FRM.QUEUE.Head
inx
cpx #K.FRMQUEUE.SIZE
bne .1
ldx #0
.1 cpx FRM.QUEUE.Tail
beq .9
ldy FRM.QUEUE.Head
stx FRM.QUEUE.Head
sta FRM.QUEUE.State,y
lda #K.FRMSEND.RETRY
sta FRM.QUEUE.Retry,y
lda hFrame1
sta FRM.QUEUE.hMem,y
clc
rts
.9 sec
rts
*--------------------------------------
FRM.Retry ldx FRM.QUEUE.Tail
.10 cpx FRM.QUEUE.Head
beq .8 Queue is empty, exit....
lda FRM.QUEUE.hMem,x
>SYSCALL GetMemPtrA
>STYA ZPFrameBase1
ldx FRM.QUEUE.Tail
lda FRM.QUEUE.State,x
cmp #ERR.DEV+1 Device error ?
bcc .1 yes, retry sending...
jsr IP.SetDestMAC Err is ARP or higher, retry getting MAC
bcs .2 still error getting dest MAC
.1 >PUSHW ZPFrameBase1 try sending again to DRV
ldx #DEVMGR.NET.SEND
jsr NetDevJmp
bcc .3
.2 ldx FRM.QUEUE.Tail save error...
sta FRM.QUEUE.State,x
dec FRM.QUEUE.Retry,x
bne .8 exit....until next run!
.3 ldx FRM.QUEUE.Tail Success,or max retry, discard entry
lda FRM.QUEUE.hMem,x
>SYSCALL FreeMemA
.4 ldx FRM.QUEUE.Tail
inx
cpx #K.FRMQUEUE.SIZE
bne .5
ldx #0
.5 stx FRM.QUEUE.Tail
bra .10
.8 rts
*--------------------------------------
FRM.GetLen1 lda (ZPFrameBase1) Get Frame Len
sta ZPFrameLen1
ldy #1
lda (ZPFrameBase1),y
sta ZPFrameLen1+1
rts
*--------------------------------------
MAN
SAVE LIB/LIBTCPIP.S.FRM
LOAD LIB/LIBTCPIP.S
ASM
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