mirror of
https://github.com/A2osX/A2osX.git
synced 2024-11-22 16:31:07 +00:00
362 lines
6.2 KiB
Plaintext
362 lines
6.2 KiB
Plaintext
PR#3
|
||
PREFIX /A2OSX.SRC
|
||
NEW
|
||
INC 1
|
||
AUTO 6
|
||
.LIST OFF
|
||
*--------------------------------------
|
||
TCP.IN ldy #S.IP.SRC+3
|
||
ldx #3
|
||
|
||
.1 lda (ZPFrameBase1),y
|
||
sta TmpSocket+S.SOCKET.DST.ADDR,x
|
||
dey
|
||
dex
|
||
bpl .1
|
||
|
||
ldy #S.TCP.SRCPORT
|
||
lda (ZPFrameBase1),y
|
||
sta TmpSocket+S.SOCKET.DST.PORT+1
|
||
iny
|
||
lda (ZPFrameBase1),y
|
||
sta TmpSocket+S.SOCKET.DST.PORT
|
||
|
||
ldy #S.IP.DST+3
|
||
ldx #3
|
||
.2 lda (ZPFrameBase1),y
|
||
sta TmpSocket+S.SOCKET.SRC.ADDR,x
|
||
dey
|
||
dex
|
||
bpl .2
|
||
|
||
ldy #S.TCP.DSTPORT
|
||
lda (ZPFrameBase1),y
|
||
sta TmpSocket+S.SOCKET.SRC.PORT+1
|
||
iny
|
||
lda (ZPFrameBase1),y
|
||
sta TmpSocket+S.SOCKET.SRC.PORT
|
||
|
||
>LDYA L.SKT.TABLE
|
||
>STYA ZPPtrSKT
|
||
|
||
ldx #0
|
||
|
||
.3 lda (ZPPtrSKT)
|
||
beq .7
|
||
cmp #S.SOCKET.SOCK.STREAM
|
||
bne .7
|
||
|
||
ldy #S.SOCKET.SRC.ADDR
|
||
|
||
.4 lda TmpSocket,y
|
||
cmp (ZPPtrSKT),y
|
||
bne .7 Not for this socket...
|
||
iny
|
||
cpy #S.SOCKET.SRC.PORT+2
|
||
bne .4
|
||
|
||
ldy #S.SOCKET.SO
|
||
lda (ZPPtrSKT),y
|
||
and #S.SOCKET.SO.ACCEPTCONN Listening socket?
|
||
beq .5
|
||
|
||
ldy #S.TCP.OPTIONS yes, only accept SYN packet
|
||
lda (ZPFrameBase1),y
|
||
cmp #S.TCP.OPTIONS.SYN
|
||
bne .7 not for this listening socket
|
||
jmp TCP.IN.LISTEN.NEW
|
||
|
||
.5 ldy #S.SOCKET.DST.ADDR
|
||
|
||
.6 lda TmpSocket,y regular socket, check remote ADDR/PORT
|
||
cmp (ZPPtrSKT),y
|
||
bne .7
|
||
iny
|
||
cpy #S.SOCKET.DST.PORT+2
|
||
bne .6
|
||
|
||
jmp TCP.IN.ESTABLISHED
|
||
|
||
.7 lda ZPPtrSKT
|
||
clc
|
||
adc #S.SOCKET
|
||
sta ZPPtrSKT
|
||
bcc .8
|
||
inc ZPPtrSKT+1
|
||
|
||
.8 inx
|
||
cpx #K.SKTTABLE.SIZE
|
||
bne .3
|
||
|
||
clc Discard frame
|
||
rts
|
||
*--------------------------------------
|
||
TCP.IN.LISTEN.NEW
|
||
lda #S.SOCKET.SOCK.STREAM
|
||
sta TmpSocket
|
||
|
||
stz TmpSocket+S.SOCKET.SO
|
||
|
||
ldy #S.TCP.SEQ.NUMBER+3
|
||
ldx #3
|
||
|
||
sec
|
||
.1 lda (ZPFrameBase1),y
|
||
adc #0
|
||
sta TmpSocket+S.SOCKET.SQ.ACKNUM,x
|
||
dey
|
||
dex
|
||
bpl .1
|
||
|
||
ldx #3
|
||
.2 lda A2osX.TIMER16,x
|
||
sta TmpSocket+S.SOCKET.SQ.SEQNUM,x
|
||
dex
|
||
bpl .2
|
||
|
||
>PUSHW L.TmpSocket
|
||
|
||
jsr SKT.NEW
|
||
bcs .9
|
||
|
||
phy
|
||
pha
|
||
|
||
ldy #S.SOCKET.STATUS
|
||
lda #S.SOCKET.STATUS.SYNRCVD
|
||
sta (ZPPtrSKT),y
|
||
|
||
txa
|
||
ldy #S.SOCKET.PARENT
|
||
sta (ZPPtrSKT),y
|
||
|
||
pla
|
||
sta ZPPtrSKT+1
|
||
pla
|
||
sta ZPPtrSKT
|
||
|
||
jsr TCP.SendSYNACK
|
||
|
||
|
||
|
||
|
||
clc
|
||
.9 rts
|
||
*--------------------------------------
|
||
TCP.IN.ESTABLISHED
|
||
stx hSocket
|
||
ldy #S.SOCKET.STATUS
|
||
lda (ZPPtrSKT),y
|
||
cmp #S.SOCKET.STATUS.SYNRCVD Waiting for ACK to establish?
|
||
bne .1
|
||
|
||
ldy #S.TCP.OPTIONS yes, only accept ACK packet
|
||
lda (ZPFrameBase1),y
|
||
cmp #S.TCP.OPTIONS.ACK
|
||
bne .8
|
||
|
||
ldx #3
|
||
ldy #S.SOCKET.SQ.SEQNUM+3
|
||
sec
|
||
.10 lda (ZPPtrSKT),y
|
||
adc #0
|
||
sta TmpDWord,x
|
||
dey
|
||
dex
|
||
bpl .10
|
||
|
||
ldx #3
|
||
ldy #S.TCP.ACK.NUMBER+3
|
||
.11 lda (ZPFrameBase1),y
|
||
cmp TmpDWord,x
|
||
bne .8
|
||
dey
|
||
dex
|
||
bpl .11
|
||
|
||
ldx #3
|
||
ldy #S.SOCKET.SQ.SEQNUM+3
|
||
.12 lda TmpDWord,x
|
||
sta (ZPPtrSKT),y
|
||
dey
|
||
dex
|
||
bpl .12
|
||
|
||
ldy #S.SOCKET.STATUS
|
||
lda #S.SOCKET.STATUS.ESTBLSH
|
||
sta (ZPPtrSKT),y
|
||
|
||
>PUSHW K.TCP.WSIZE
|
||
>PUSHBI 0
|
||
>SYSCALL SYS.GetMem
|
||
bcs *
|
||
txa
|
||
|
||
ldy #S.SOCKET.SQ.hInMem
|
||
sta (ZPPtrSKT),y
|
||
|
||
>PUSHW K.TCP.WSIZE
|
||
>PUSHBI 0
|
||
>SYSCALL SYS.GetMem
|
||
bcs *
|
||
txa
|
||
|
||
ldy #S.SOCKET.SQ.hOutMem
|
||
sta (ZPPtrSKT),y
|
||
|
||
ldy #S.SOCKET.PARENT
|
||
lda (ZPPtrSKT),y
|
||
jsr SKT.GetA
|
||
|
||
lda hSocket
|
||
jsr SKT.AddToQueueL
|
||
|
||
.8 clc
|
||
rts
|
||
|
||
.1 cmp #S.SOCKET.STATUS.ESTBLSH
|
||
bne .99
|
||
|
||
|
||
|
||
|
||
bra *
|
||
.99 clc
|
||
rts
|
||
*--------------------------------------
|
||
TCP.SendSYNACK ldy #S.SOCKET.SRC.ADDR+3
|
||
ldx #3
|
||
.1 lda (ZPPtrSKT),y
|
||
sta TCP.MSG+S.IP.SRC,x
|
||
dey
|
||
dex
|
||
bpl .1
|
||
|
||
ldy #S.SOCKET.SRC.PORT
|
||
lda (ZPPtrSKT),y
|
||
sta TCP.MSG+S.TCP.SRCPORT+1
|
||
iny
|
||
lda (ZPPtrSKT),y
|
||
sta TCP.MSG+S.TCP.SRCPORT
|
||
|
||
ldy #S.SOCKET.DST.ADDR+3
|
||
ldx #3
|
||
.2 lda (ZPPtrSKT),y
|
||
sta TCP.MSG+S.IP.DST,x
|
||
dey
|
||
dex
|
||
bpl .2
|
||
|
||
ldy #S.SOCKET.DST.PORT
|
||
lda (ZPPtrSKT),y
|
||
sta TCP.MSG+S.TCP.DSTPORT+1
|
||
iny
|
||
lda (ZPPtrSKT),y
|
||
sta TCP.MSG+S.TCP.DSTPORT
|
||
|
||
ldy #S.SOCKET.SQ.SEQNUM+7
|
||
ldx #7
|
||
.3 lda (ZPPtrSKT),y
|
||
sta TCP.MSG+S.TCP.SEQ.NUMBER,x
|
||
dey
|
||
dex
|
||
bpl .3
|
||
|
||
lda #S.TCP.OPTIONS.SYN+S.TCP.OPTIONS.ACK
|
||
sta TCP.MSG+S.TCP.OPTIONS
|
||
|
||
>PUSHW L.TCP.MSG
|
||
jsr SEND.TCP.FRAME
|
||
|
||
clc
|
||
rts
|
||
*--------------------------------------
|
||
TCP.ComputeChecksum
|
||
lda #0 RESET.TCP.CHECKSUM
|
||
ldy #S.TCP.CHECKSUM
|
||
sta (ZPFrameBase1),y
|
||
iny
|
||
sta (ZPFrameBase1),y
|
||
|
||
>LDYA ZPFrameBase1
|
||
>STYA ZPTmpPtr1
|
||
|
||
lda ZPFrameLen1
|
||
sec
|
||
sbc #S.IP-2
|
||
sta ZPDataLen
|
||
|
||
lda ZPFrameLen1+1
|
||
sbc /S.IP-2
|
||
sta ZPDataLen+1
|
||
|
||
clc
|
||
|
||
* lda ZPDataLen+1
|
||
* adc #0 RESERVED (all zero)
|
||
sta IP.CHECKSUM
|
||
|
||
lda ZPDataLen
|
||
adc #S.IP.PROTOCOL.TCP
|
||
sta IP.CHECKSUM+1
|
||
|
||
ldy #S.IP.SRC
|
||
|
||
ldx #4 4 words for SRC & DST IP
|
||
|
||
.10 lda (ZPFrameBase1),y
|
||
adc IP.CHECKSUM
|
||
sta IP.CHECKSUM
|
||
iny
|
||
lda (ZPFrameBase1),y
|
||
adc IP.CHECKSUM+1
|
||
sta IP.CHECKSUM+1
|
||
iny
|
||
dex
|
||
bne .10
|
||
|
||
ldy #S.IP
|
||
|
||
.1 jsr DecDataLen
|
||
beq .8
|
||
|
||
lda (ZPTmpPtr1),y
|
||
adc IP.CHECKSUM
|
||
sta IP.CHECKSUM
|
||
|
||
iny
|
||
bne .20
|
||
inc ZPTmpPtr1+1
|
||
|
||
.20 jsr DecDataLen
|
||
bne .2
|
||
lda #0
|
||
bra .21
|
||
|
||
.2 lda (ZPTmpPtr1),y
|
||
|
||
.21 adc IP.CHECKSUM+1
|
||
sta IP.CHECKSUM+1
|
||
|
||
iny
|
||
bne .1
|
||
inc ZPTmpPtr1+1
|
||
bra .1
|
||
|
||
.8 ldy #S.TCP.CHECKSUM
|
||
lda IP.CHECKSUM
|
||
adc #0 Don't forget to add last carry!!!
|
||
eor #$FF
|
||
sta (ZPFrameBase1),y
|
||
iny
|
||
lda IP.CHECKSUM+1
|
||
adc #0 Don't forget to add last carry!!!
|
||
eor #$FF
|
||
sta (ZPFrameBase1),y
|
||
rts
|
||
*--------------------------------------
|
||
MAN
|
||
SAVE LIB/LIBTCPIP.S.TCP
|
||
LOAD LIB/LIBTCPIP.S
|
||
ASM
|