Apple-2-SW/A2osX
1
0
Fork 0
mirror of https://github.com/A2osX/A2osX.git synced 2024-10-31 23:09:33 +00:00
Code Issues Projects Releases Wiki Activity
324423e027
A2osX/LIB/LIBTCPIP.S.TCP.txt
Rémy GIBERT 022f5921ac Kernel 0.92
2018-11-19 08:43:00 +01:00

536 lines
11 KiB
Plaintext
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

NEW
PREFIX
AUTO 4,1
.LIST OFF
*--------------------------------------
TCP.IN
* ldy #S.TCP.OPTIONS
* lda (ZPFrameInPtr),y
* cmp #S.TCP.OPTIONS.ACK
* bne .1
* >DEBUG
*.1
jsr FRM.GetTargetSKT.TCPUDP
jsr SKT.FindMatchingLocRem
bcs TCP.IN.JMP.CLOSED no socket, go discard
ldy #S.SOCKET.PROTO
lda (ZPPtrSKT),y
cmp #S.IP.PROTOCOL.TCP
bne TCP.IN.JMP.CLOSED wrong protocol, go discard
ldy #S.TCP.OPTIONS
lda (ZPFrameInPtr),y
and #S.TCP.OPTIONS.RST RST ? go Kill this socket...
bne TCP.IN.RST ...and discard frame
ldy #S.SOCKET.TCP.S
lda (ZPPtrSKT),y
asl
tax
jmp (J.TCP.IN,x)
*--------------------------------------
TCP.IN.RST lda SKT.TABLE,x
jsr SKT.shutdown
*--------------------------------------
TCP.IN.JMP.CLOSED
lda hFrameIn
stz hFrameIn
>SYSCALL FreeMem
rts
*--------------------------------------
TCP.CLOSE ldx #0
.1 phx
lda SKT.TABLE,x
beq .8
>SYSCALL GetMemPtr
>STYA ZPTmpPtr1
ldy #S.SOCKET.AF
lda (ZPTmpPtr1),y
cmp #AF.INET
bne .8
iny #S.SOCKET.T
lda (ZPTmpPtr1),y
cmp #S.SOCKET.T.SEQPACKET
bcc .8
ldy #S.SOCKET.TCP.S
lda (ZPTmpPtr1),y
cmp #S.SOCKET.TCP.S.TIMEWT
bne .8
ldy #S.SOCKET.SQ.hInMem
lda (ZPTmpPtr1),y
>SYSCALL freemem
ldy #S.SOCKET.SQ.hOutMem
lda (ZPTmpPtr1),y
>SYSCALL freemem
plx
phx
lda SKT.TABLE,x
>SYSCALL freemem
plx
phx
stz SKT.TABLE,x
.8 plx
inx
cpx #K.SKTTABLE.SIZE
bne .1
.9 rts
*--------------------------------------
TCP.IN.JMP.LISTEN
ldy #S.SOCKET.T Create a new client socket
lda (ZPPtrSKT),y
tax Same type a listening socket
iny #S.SOCKET.PROTO
lda (ZPPtrSKT),y
jsr SKT.Socket.I get new socket in ZPTmpPtr1
bcs TCP.IN.JMP.CLOSED
jsr SKT.AddToQueueA Queued successfully ?
bcs TCP.IN.JMP.CLOSED no, discard frame and new socket
jsr ARP.AddFromFrameInPtr
lda ZPTmpPtr1
sta ZPPtrSKT
lda ZPTmpPtr1+1
sta ZPPtrSKT+1
jsr SKT.SetLocAddr
jsr SKT.SetRemAddr
jsr SKT.NewTCB
bcs .99
jsr TCP.IN.ACKTheSYN
lda #S.TCP.OPTIONS.SYN+S.TCP.OPTIONS.ACK
jsr TCP.OUT.SendOptA SYN received, Send SYN.ACK
bcs .9
lda #S.SOCKET.TCP.S.SYNRCVD
jmp SKT.StoreTCB.S
.9 lda #ERR.SKT.OOS
.99 rts
*--------------------------------------
TCP.IN.JMP.SYNSENT
ldy #S.TCP.OPTIONS SYN Send, only accept SYN.ACK packet, then Send ACK
lda (ZPFrameInPtr),y
and #S.TCP.OPTIONS.SYN+S.TCP.OPTIONS.ACK
cmp #S.TCP.OPTIONS.SYN+S.TCP.OPTIONS.ACK
bne .9
jsr SKT.GetTCB
ldx #3
ldy #S.TCP.ACKNUM+3
sec Check if ACK=OUTNEXTSEQ+1
.1 lda SKT.Cache+S.SOCKET.TCP.OUTNEXTSEQ,x
adc #0
sta SKT.Cache+S.SOCKET.TCP.OUTNEXTSEQ,x
eor (ZPFrameInPtr),y
bne .9
dey
dex
bpl .1
jsr TCP.IN.ACKTheSYN
lda #S.TCP.OPTIONS.ACK
jsr TCP.OUT.SendOptA SYN.ACK recieved, Send, ACK
bcs .9
lda #S.SOCKET.TCP.S.ESTBLSH
jmp SKT.StoreTCB.S
.9 lda #S.TCP.OPTIONS.RST
jsr TCP.OUT.SendOptA
ldx SKT.Index
lda SKT.TABLE,x
jmp SKT.shutdown
*--------------------------------------
TCP.IN.JMP.SYNRCVD
ldy #S.TCP.OPTIONS SYN Received, SYN.ACK Sent, only accept ACK packet
lda (ZPFrameInPtr),y
cmp #S.TCP.OPTIONS.ACK
bne .8
jsr SKT.GetTCB
ldx #3
ldy #S.TCP.ACKNUM+3
sec
.1 lda SKT.Cache+S.SOCKET.TCP.OUTNEXTSEQ,x Check if ACK=OUTNEXTSEQ+1
adc #0
sta SKT.Cache+S.SOCKET.TCP.OUTSEQNUM,x setup SEQNUM
sta SKT.Cache+S.SOCKET.TCP.OUTNEXTSEQ,x ...and update NEXTSEQ
eor (ZPFrameInPtr),y
bne .8
dey
dex
bpl .1
lda #S.SOCKET.TCP.S.ESTBLSH
jmp SKT.StoreTCB.S
.8 clc
.9 rts
*--------------------------------------
TCP.IN.JMP.ESTBLSH
jsr SKT.GetTCB
ldy #S.TCP.OPTIONS
lda (ZPFrameInPtr),y
and #S.TCP.OPTIONS.ACK Remote side ACKed data ?
beq .1
jsr SKT.AckDataToSktOut Yes, Discard sent data
jsr SKT.StoreTCB and update SKT
.1 jsr TCP.IN.SetDataInPtrAndLen
lda ZPDataInLen Incoming Data in this frame ?
ora ZPDataInLen+1
beq .2 No data, ...
jsr SKT.AddDataToSktIn yes, queue data if there is room for....
bcs .2
jsr SKT.StoreTCB success, update socket
.2 ldy #S.TCP.OPTIONS
lda (ZPFrameInPtr),y
and #S.TCP.OPTIONS.FIN
beq .8
jsr TCP.IN.ACKTheFIN
lda #S.TCP.OPTIONS.FIN+S.TCP.OPTIONS.ACK
jsr TCP.OUT.SendOptA FIN received, Send FIN.ACK
bcs .9
lda #S.SOCKET.TCP.S.CLWAIT
jmp SKT.StoreTCB.S
.8 clc
.9 rts
*--------------------------------------
TCP.IN.JMP.CLWAIT
clc Wait for SKT.shutdown
rts
*--------------------------------------
TCP.IN.JMP.LASTACK
ldy #S.TCP.OPTIONS only accept ACK packet
lda (ZPFrameInPtr),y
bit #S.TCP.OPTIONS.ACK
beq .8
ldy #S.SOCKET.TCP.S
lda #S.SOCKET.TCP.S.TIMEWT
sta (ZPPtrSKT),y
.8 clc
rts
*--------------------------------------
TCP.IN.JMP.FINWT1
jsr SKT.GetTCB
ldy #S.TCP.OPTIONS FIN sent, accept ACK or FIN/ACK packet
lda (ZPFrameInPtr),y
bit #S.TCP.OPTIONS.FIN
bne .1
lda #S.TCP.OPTIONS.FIN+S.TCP.OPTIONS.ACK
jsr TCP.OUT.SendOptA Send FIN.ACK
bcs .9
lda #S.SOCKET.TCP.S.FINWT2
jmp SKT.StoreTCB.S
.1 jsr TCP.IN.ACKTheFIN FIN/ACK
lda #S.TCP.OPTIONS.FIN+S.TCP.OPTIONS.ACK
jsr TCP.OUT.SendOptA Send FIN.ACK
bcs .9
lda #S.SOCKET.TCP.S.TIMEWT
jmp SKT.StoreTCB.S
* clc
.9 rts
*--------------------------------------
TCP.IN.JMP.FINWT2
ldy #S.TCP.OPTIONS only accept FIN packet
lda (ZPFrameInPtr),y
bit #S.TCP.OPTIONS.FIN
beq .8
jsr SKT.GetTCB
jsr TCP.IN.ACKTheFIN
lda #S.TCP.OPTIONS.ACK
jsr TCP.OUT.SendOptA FIN received, Send ACK
bcs .9
lda #S.SOCKET.TCP.S.TIMEWT
jmp SKT.StoreTCB.S
.8 clc
.9 rts
*--------------------------------------
TCP.IN.JMP.CLOSING
ldy #S.TCP.OPTIONS only accept ACK packet
lda (ZPFrameInPtr),y
bit #S.TCP.OPTIONS.ACK
beq .1
ldy #S.SOCKET.TCP.S
lda #S.SOCKET.TCP.S.TIMEWT
sta (ZPPtrSKT),y
.1 clc
rts
*--------------------------------------
TCP.IN.JMP.TIMEWT
clc Wait for TCP.Close
rts
*--------------------------------------
TCP.IN.ACKTheSYN
ldy #S.TCP.SEQNUM+3 Get Remote SEQ
ldx #3
sec
.3 lda (ZPFrameInPtr),y Set OUTACK=SEQ+1 for new socket...
adc #0
sta SKT.Cache+S.SOCKET.TCP.INLASTSEQNUM,x
sta SKT.Cache+S.SOCKET.TCP.OUTACKNUM,x
dey
dex
bpl .3
rts
*--------------------------------------
TCP.IN.ACKTheFIN
ldy #S.SOCKET.TCP.O
lda (ZPPtrSKT),y
ora #S.TCP.OPTIONS.ACK
sta (ZPPtrSKT),y
ldx #3
sec
.2 lda SKT.Cache+S.SOCKET.TCP.INLASTSEQNUM,x
adc #0
sta SKT.Cache+S.SOCKET.TCP.INLASTSEQNUM,x
dex
bpl .2
ldx #3
sec
.3 lda SKT.Cache+S.SOCKET.TCP.OUTACKNUM,x
adc #0
sta SKT.Cache+S.SOCKET.TCP.OUTACKNUM,x
dex
bpl .3
rts
*--------------------------------------
TCP.IN.SetDataInPtrAndLen
ldy #S.IP.TOTAL.LENGTH+1
lda (ZPFrameInPtr),y
sec
sbc #S.IP-S.ETH.EII
sta ZPDataInLen
dey
lda (ZPFrameInPtr),y
sbc /S.IP-S.ETH.EII
sta ZPDataInLen+1
ldy #S.TCP.DATAOFFSET
lda (ZPFrameInPtr),y
and #$F0 Get TCP Header len in DWORD
lsr
lsr
sta TmpOffset
lda ZPDataInLen
sec
sbc TmpOffset
sta ZPDataInLen
bcs .1
dec ZPDataInLen+1
.1 lda ZPFrameInPtr
clc
adc #S.IP
pha
lda ZPFrameInPtr+1
adc /S.IP
tax
pla
clc
adc TmpOffset
bcc .2
inx
.2 sta ZPDataInPtr
stx ZPDataInPtr+1
rts
*--------------------------------------
TCP.OUT jsr SKT.GetTCB
TCP.OUT.I lda SKT.Cache+S.SOCKET.TCP.OUTTOSEND+1
ldy SKT.Cache+S.SOCKET.TCP.OUTTOSEND
bne .1
tax
bne .1
* Y,A=0 : no data to send
ldy #S.SOCKET.TCP.O
lda (ZPPtrSKT),y
bne TCP.OUT.SendOptA a least an option...
clc No, data, no flag....exit
rts
.1 cpy #K.TCP.MSS
pha
sbc /K.TCP.MSS OUTDATA > MSS ?
pla
bcc .2 no....keep data len
>LDYAI K.TCP.MSS yes send only MSS
.2 jsr TCP.NewFrame
bcs TCP.OUT.9
jsr SKT.GetDataFromSktOut
ldy #S.SOCKET.TCP.O
lda (ZPPtrSKT),y
ora #S.TCP.OPTIONS.ACK
jsr TCP.OUT.SendOptA.1
bcs TCP.OUT.9
lda SKT.Cache+S.SOCKET.TCP.OUTNEXTSEQ+3
clc
adc ZPDataOutLen
sta SKT.Cache+S.SOCKET.TCP.OUTNEXTSEQ+3
lda SKT.Cache+S.SOCKET.TCP.OUTNEXTSEQ+2
adc ZPDataOutLen+1
sta SKT.Cache+S.SOCKET.TCP.OUTNEXTSEQ+2
bcc .80
inc SKT.Cache+S.SOCKET.TCP.OUTNEXTSEQ+1
bne .80
inc SKT.Cache+S.SOCKET.TCP.OUTNEXTSEQ
.80 jmp SKT.StoreTCB exits with CC
TCP.OUT.9 rts
*--------------------------------------
TCP.OUT.SendOptA
sta .1+1
>LDYAI 0
jsr TCP.NewFrame
bcs TCP.OUT.9
.1 lda #$ff
TCP.OUT.SendOptA.1
ldy #S.TCP.OPTIONS
sta (ZPFrameOutPtr),y
bit #S.TCP.OPTIONS.ACK
beq .10
ldx #3
ldy #S.TCP.ACKNUM+3
.1 lda SKT.Cache+S.SOCKET.TCP.OUTACKNUM,x
sta (ZPFrameOutPtr),y
dey
dex
bpl .1
.10 ldx #3
ldy #S.TCP.SEQNUM+3
.2 lda SKT.Cache+S.SOCKET.TCP.OUTNEXTSEQ,x
sta (ZPFrameOutPtr),y
dey
dex
bpl .2
ldy #S.TCP.WINDOW
lda SKT.Cache+S.SOCKET.TCP.INFREE+1
sta (ZPFrameOutPtr),y
iny
lda SKT.Cache+S.SOCKET.TCP.INFREE
sta (ZPFrameOutPtr),y
jsr FRM.SendIP
bcs .9
ldy #S.SOCKET.TCP.O
lda #0
sta (ZPPtrSKT),y
* clc
.9 rts
*--------------------------------------
TCP.NewFrame ldx #S.IP.PROTOCOL.TCP
jsr FRM.NewIP
bcs .9
jsr SKT.SetFrameOutDstIP
jsr SKT.SetFrameOutTCPUDPPorts
ldy #S.TCP.DATAOFFSET
lda #$50 Header size = 5 DWORDS
sta (ZPFrameOutPtr),y
ldy #S.TCP.WINDOW
lda SKT.Cache+S.SOCKET.TCP.INFREE+1
sta (ZPFrameOutPtr),y
iny
lda SKT.Cache+S.SOCKET.TCP.INFREE
sta (ZPFrameOutPtr),y
clc
.9 rts
*--------------------------------------
MAN
SAVE USR/SRC/LIB/LIBTCPIP.S.TCP
LOAD USR/SRC/LIB/LIBTCPIP.S
ASM
Reference in New Issue View Git Blame Copy Permalink