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A2osX/LIB/LIBTCPIP.S.SKT.txt
burniouf 84d77aaf7f TCPIP:fixes for dual FIN/ACK transaction 
DAN2ETH.DRV
2023-01-06 15:02:35 +01:00

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NEW
AUTO 3,1
*/--------------------------------------
* # Socket
* Create a new socket
* ## C
* `hFD socket(short int type, short int protocol);`
* ## ASM
* **In:**
* `>PUSHB type`
* `>PUSHB protocol`
* `>LIBCALL hLIBTCPIP,LIBTCPIP.socket`
* ## RETURN VALUE
* CC: A = hSOCKET
* CS: A = EC
*\--------------------------------------
SKT.Socket >PULLA get protocol (RAW)
pha
>PULLA
tax
pla
SKT.Socket.I jmp (J.SKT.Socket,x)
SKT.Socket.RAW ldy #S.SOCKET
bra SKT.Socket.DSOCK
SKT.Socket.DGRAM
lda #S.IP.PROTOCOL.UDP
ldy #S.SOCKET
SKT.Socket.DSOCK
stx FD.DSOCK+S.SOCKET.T save type
sta FD.DSOCK+S.SOCKET.PROTO ICMP,UDP,TCP
jsr SKT.Socket.FindFree
bcs SKT.Socket.RTS
ldy #0
.1 lda FD.DSOCK,y
sta (ZPTmpPtr1),y
iny
cpy #FD.DSOCK.SIZE
bne .1
bra SKT.Socket.ZERO
SKT.Socket.SEQPKT
SKT.Socket.STREAM
lda #S.IP.PROTOCOL.TCP
ldy #S.SOCKET.TCP
stx FD.SSOCK+S.SOCKET.T save type
sta FD.SSOCK+S.SOCKET.PROTO
jsr SKT.Socket.FindFree
bcs SKT.Socket.RTS
ldy #0
.1 lda FD.SSOCK,y
sta (ZPTmpPtr1),y
iny
cpy #FD.SSOCK.SIZE
bne .1
SKT.Socket.ZERO lda #0
.1 sta (ZPTmpPtr1),y
iny
cpy TmpDWord
bne .1
txa
clc
SKT.Socket.RTS rts
*--------------------------------------
SKT.Socket.FindFree
sty TmpDWord Y = socket.size
ldx #0
.1 lda SKT.TABLE,x
beq .2
inx
cpx #K.SKTTABLE.SIZE
bne .1
lda #E.OOH
* sec
rts
.2 stx .8+1
* lda #0 Y,A = socket.size
>SYSCALL2 GetMem
bcs SKT.Socket.RTS
>STYA ZPTmpPtr1
txa
.8 ldy #$FF SELF MODIFIED
sta SKT.TABLE,y
* clc
rts
*/--------------------------------------
* # Bind
* bind a name to a socket
* ## C
* `int bind(hFD fd, const struct sockaddr *addr);`
* ## ASM
* **In:**
* `>PUSHB fd`
* `>PUSHW addr`
* `>LIBCALL hLIBTCPIP,LIBTCPIP.socket`
* ## RETURN VALUE
* CC: A = hSOCKET
* CS: A = EC
*\--------------------------------------
SKT.bind jsr SKT.PullLocAddr
jsr SKT.PullhFD
lda SKT.LOC.ADDR+S.SOCKADDR.PORT
ora SKT.LOC.ADDR+S.SOCKADDR.PORT+1
bne .1
jsr GetDynPort
sta SKT.LOC.ADDR+S.SOCKADDR.PORT
stx SKT.LOC.ADDR+S.SOCKADDR.PORT+1
.1 ldx #0
.2 lda SKT.TABLE,x
beq .7
phx
>SYSCALL2 GetMemPtr
>STYA ZPTmpPtr1
plx
ldy #S.SOCKET.AF
lda (ZPTmpPtr1),y
cmp #AF.INET
bne .7
ldy #S.SOCKET.LOC.ADDR
.3 lda (ZPTmpPtr1),y
cmp SKT.LOC.ADDR+S.SOCKADDR.ADDR-S.SOCKET.LOC.ADDR,y
bne .7
iny
cpy #S.SOCKET.LOC.PORT+2
bne .3
lda #ERR.SKT.BUSY
* sec
rts
.7 inx
cpx #K.SKTTABLE.SIZE
bne .2
jmp SKT.SetLocAddr
*/--------------------------------------
* # Connect
* Initiate a connection on a socket
* ## C
* `int connect(hFD fd, const struct sockaddr *addr);`
* ## ASM
* **In:**
* `>PUSHB fd`
* `>PUSHW addr`
* `>LIBCALL hLIBTCPIP,LIBTCPIP.socket`
* ## RETURN VALUE
* CC: A = hSOCKET
* CS: A = EC
*\--------------------------------------
SKT.connect jsr SKT.PullRemAddr
jsr SKT.PullhFD
ldy #S.SOCKET.T
lda (ZPPtrSKT),y
tax
jmp (J.SKT.connect,x)
SKT.connect.RAW
SKT.connect.DGRAM
jmp SKT.SetRemAddr
SKT.connect.STREAM
SKT.connect.SEQPKT
ldy #S.SOCKET.TCP.S
lda (ZPPtrSKT),y
beq .1
cmp #S.SOCKET.TCP.S.ESTBLSH
beq SKT.listen.8
bcs .9
cmp #S.SOCKET.TCP.S.OPENED
beq .2
cmp #S.SOCKET.TCP.S.SYNSENT
beq .99
.9 lda #ERR.SKT.BAD
sec
rts
.1 jsr SKT.SetRemAddr
jsr SKT.NewTCB
bcs SKT.listen.RTS
lda #S.SOCKET.TCP.S.OPENED
jsr SKT.StoreTCB.S
.2 lda #S.TCP.OPTIONS.SYN
jsr TCP.OUT.SendOptA Send SYN
bcs .99
lda #S.SOCKET.TCP.S.SYNSENT
jsr SKT.StoreTCB.S
.99 lda #ERR.SKT.NOCONN
sec
rts
*/--------------------------------------
* # Listen
* Listen for connections on a socket
* ## C
* `int listen(hFD fd);`
* ## ASM
* **In:**
* `lda fd`
* `>LIBCALL hLIBTCPIP,LIBTCPIP.listen`
* ## RETURN VALUE
* CS: A = EC
*\--------------------------------------
SKT.listen jsr SKT.GetFD
ldy #S.SOCKET.T
lda (ZPPtrSKT),y
cmp #S.SOCKET.T.SEQPKT
bcc SKT.listen.9
ldy #S.SOCKET.TCP.S
lda (ZPPtrSKT),y
bne SKT.listen.9
lda #S.SOCKET.TCP.S.LISTEN
sta (ZPPtrSKT),y
ldy #S.SOCKET.O
lda #S.SOCKET.O.ACCEPTCONN
sta (ZPPtrSKT),y
SKT.listen.8 clc
rts
SKT.listen.9 lda #ERR.SKT.BAD
sec
SKT.listen.RTS rts
*/--------------------------------------
* # Accept
* Accept a connection on a socket
* ## C
* `hFD Accept(hFD fd);`
* ## ASM
* **In:**
* `lda fd`
* `>LIBCALL hLIBTCPIP,LIBTCPIP.accept`
* ## RETURN VALUE
* A = hSocket
*\--------------------------------------
SKT.Accept jsr SKT.GetFD
ldy #S.SOCKET.O
lda (ZPPtrSKT),y
and #S.SOCKET.O.ACCEPTCONN
beq SKT.listen.9
*--------------------------------------
SKT.GetFromQueue
ldy #S.SOCKET.HQ.TAIL
lda (ZPPtrSKT),y
iny #S.SOCKET.HQ.HEAD
cmp (ZPPtrSKT),y
beq .9 CS
pha
inc
cmp #S.SOCKET.HQ.MAX
bne .1
lda #0
.1 dey #S.SOCKET.HQ.TAIL
sta (ZPPtrSKT),y
pla
clc
adc #S.SOCKET.HQ
tay
lda (ZPPtrSKT),y
* clc
.9 rts
*/--------------------------------------
* # Shutdown
* Close socket
* ## C
* `int shutdown(int fd);`
* ## ASM
* **In:**
* `lda fd`
* `>LIBCALL hLIBTCPIP,LIBTCPIP.shutdown`
* ## RETURN VALUE
*\--------------------------------------
SKT.shutdown pha
jsr SKT.GetFD
ldy #S.SOCKET.O
lda (ZPPtrSKT),y
and #S.SOCKET.O.ACCEPTCONN
bne SKT.shutdown.HQ
ldy #S.SOCKET.T
lda (ZPPtrSKT),y
cmp #S.SOCKET.T.SEQPKT
bcc SKT.shutdown.HQ
ldy #S.SOCKET.TCP.S
lda (ZPPtrSKT),y
cmp #S.SOCKET.TCP.S.CLOSING
bne .10
inc S.SOCKET.TCP.S.TIMEWT
sta (ZPPtrSKT),y
pla
clc
rts
.10 pla
jsr SKT.GetTCB
ldy #S.SOCKET.TCP.S
lda (ZPPtrSKT),y
cmp #S.SOCKET.TCP.S.ESTBLSH
bne .1
lda #S.TCP.OPTIONS.FIN+S.TCP.OPTIONS.ACK
jsr TCP.OUT.SendOptA Send FIN/ACK
lda #S.SOCKET.TCP.S.FINWT1
jmp SKT.StoreTCB.S
.1 cmp #S.SOCKET.TCP.S.CLWAIT
beq .3
.2 lda #S.TCP.OPTIONS.RST
jsr TCP.OUT.SendOptA Send RST
.3 lda #S.SOCKET.TCP.S.TIMEWT
jmp SKT.StoreTCB.S
*--------------------------------------
SKT.shutdown.HQ jsr SKT.GetFromQueue
bcs .3
>SYSCALL2 FreeMem
bra SKT.shutdown.HQ
.3 pla get hFD...
ldx #0
.4 cmp SKT.TABLE,x
beq .5
inx
cpx #K.SKTTABLE.SIZE
bne .4
.5 stz SKT.TABLE,x
>SYSCALL2 freemem
* clc
rts
*/--------------------------------------
* # Read (STREAM)
* ## C
* `int skt.read(hFD fd, void *buf, int count);`
* ## ASM
* **In:**
* `>PUSHB fd`
* `>PUSHW buf`
* `>PUSHW count`
* `>LIBCALL hLIBTCPIP,LIBTCPIP.read`
* ## RETURN VALUE
* CC: Y,A = bytes read
* CS: A = EC
*\--------------------------------------
SKT.Read jsr SKT.PullhFDDataInPtrLen
ldy #S.SOCKET.TCP.INUSED
lda (ZPPtrSKT),y
tax
iny
ora (ZPPtrSKT),y
beq .7 no data, go check SKT status
cpx ZPDataInLen XA = Data in pipe
lda (ZPPtrSKT),y
sbc ZPDataInLen+1
bcs SKT.GetDataFromSktIn more data in pipe, get full buffer of data
stx ZPDataInLen less data than INUSED, Get only INUSED data
lda (ZPPtrSKT),y
sta ZPDataInLen+1
bra SKT.GetDataFromSktIn
.7 ldy #S.SOCKET.TCP.O
lda (ZPPtrSKT),y
and #S.TCP.OPTIONS.ACK
beq .8
jmp TCP.OUT.SendOptA
.8 jsr SKT.CheckStream
bcs .99 I/O error
lda #E.NODATA
sec
.99 rts
*--------------------------------------
* In:
* Src : hInMem/INTAIL
* Dst : ZPDataOutPtr/ZPDataOutLen
* Out:
* Y,A = bytes read
*--------------------------------------
SKT.GetDataFromSktIn
jsr SKT.GetTCB
ldy #S.SOCKET.SQ.hInMem
lda (ZPPtrSKT),y
.DO AUXPIPE=1
>SYSCALL2 GetStkObjPtr
.ELSE
>SYSCALL2 GetMemPtr
.FIN
sty ZPTmpPtr1
* clc
adc SKT.Cache+S.SOCKET.TCP.INTAIL+1
sta ZPTmpPtr1+1
jsr SKT.GetNotDataInLen
pha
.DO AUXPIPE=1
jsr SKT.SetupZPCode
.FIN
ldy SKT.Cache+S.SOCKET.TCP.INTAIL
.1 inx Check if room left in dest buffer
bne .2
pla
inc
beq .8
pha
.2 .DO AUXPIPE=1
jsr ZPCode
.ELSE
lda (ZPTmpPtr1),y
.FIN
sta (ZPDataInPtr)
inc ZPDataInPtr
bne .3
inc ZPDataInPtr+1
.3 iny
bne .1
inc ZPTmpPtr1+1
inc SKT.Cache+S.SOCKET.TCP.INTAIL+1
lda SKT.Cache+S.SOCKET.TCP.INTAIL+1
cmp /K.TCP.WSIZE
bne .1
stz SKT.Cache+S.SOCKET.TCP.INTAIL+1
lda ZPTmpPtr1+1
* sec
sbc /K.TCP.WSIZE
sta ZPTmpPtr1+1
bra .1
.8 sty SKT.Cache+S.SOCKET.TCP.INTAIL
* >ADC16 SKT.Cache+S.SOCKET.TCP.INFREE,ZPDataInLen
ldx #S.SOCKET.TCP.INFREE
jsr SKT.AddDataInLenAtSktX
* >SBC16 SKT.Cache+S.SOCKET.TCP.INUSED,ZPDataInLen
ldx #S.SOCKET.TCP.INUSED
jsr SKT.SubDataInLenAtSktX
jsr SKT.StoreTCB
jsr TCP.SetSocketTCPO.ACK ACK=1 -> send WSIZE
* lda #S.TCP.OPTIONS.ACK
* jsr TCP.OUT.SendOptA
>LDYA ZPDataInLen
clc
rts
*--------------------------------------
* From TCP.IN
* Src : ZPDataInPtr/ZPDataInLen
* Dst : hInMem/INHEAD
*--------------------------------------
SKT.AddDataToSktIn
lda SKT.Cache+S.SOCKET.TCP.INFREE
sec
sbc ZPDataInLen
tax
lda SKT.Cache+S.SOCKET.TCP.INFREE+1
sbc ZPDataInLen+1
bcc .9 Not enough room in Q
stx SKT.Cache+S.SOCKET.TCP.INFREE
sta SKT.Cache+S.SOCKET.TCP.INFREE+1
ldy #S.SOCKET.SQ.hInMem
lda (ZPPtrSKT),y
.DO AUXPIPE=1
>SYSCALL2 GetStkObjPtr
.ELSE
>SYSCALL2 GetMemPtr
.FIN
sty ZPTmpPtr1
* clc
adc SKT.Cache+S.SOCKET.TCP.INHEAD+1
sta ZPTmpPtr1+1
jsr SKT.GetNotDataInLen
pha
ldy SKT.Cache+S.SOCKET.TCP.INHEAD
.1 .DO AUXPIPE=1
sta SETWRITEAUX
.FIN
.2 inx
bne .3
pla
inc
beq .8
pha
.3 lda (ZPDataInPtr)
sta (ZPTmpPtr1),y
inc ZPDataInPtr
bne .4
inc ZPDataInPtr+1
.4 iny
bne .2
.DO AUXPIPE=1
sta CLRWRITEAUX
.FIN
inc ZPTmpPtr1+1
inc SKT.Cache+S.SOCKET.TCP.INHEAD+1
lda SKT.Cache+S.SOCKET.TCP.INHEAD+1
cmp /K.TCP.WSIZE
bne .1
stz SKT.Cache+S.SOCKET.TCP.INHEAD+1
lda ZPTmpPtr1+1
* sec
sbc /K.TCP.WSIZE
sta ZPTmpPtr1+1
bra .1
.9 sec
rts
.8 .DO AUXPIPE=1
sta CLRWRITEAUX
.FIN
sty SKT.Cache+S.SOCKET.TCP.INHEAD
* >ADC16 SKT.Cache+S.SOCKET.TCP.INUSED,ZPDataInLen
ldx #S.SOCKET.TCP.INUSED
jsr SKT.AddDataInLenAtSktX
clc
rts
*/--------------------------------------
* # Write (STREAM)
* ## C
* `int skt.write(hFD fd, const void *buf, int count);`
* ## ASM
* **In:**
* `>PUSHB fd`
* `>PUSHW buf`
* `>PUSHW count`
* `>LIBCALL hLIBTCPIP,LIBTCPIP.write`
* ## RETURN VALUE
* CC: Y,A = bytes written
* CS: A = EC
*\--------------------------------------
SKT.Write jsr SKT.PullhFDDataInPtrLen
jsr SKT.CheckStream
bcs .99
jsr SKT.GetTCB
ldx SKT.Cache+S.SOCKET.TCP.OUTFREE
cpx ZPDataInLen
lda SKT.Cache+S.SOCKET.TCP.OUTFREE+1
sbc ZPDataInLen+1
bcs SKT.AddDataToSktOut
lda #E.NODATA Not enough room in Q,no data transfered
sec
.99 rts
*--------------------------------------
* Src : ZPDataInPtr/ZPDataInLen
* Dst : hOutMem/OUTHEAD
*--------------------------------------
SKT.AddDataToSktOut
ldy #S.SOCKET.SQ.hOutMem
lda (ZPPtrSKT),y
.DO AUXPIPE=1
>SYSCALL2 GetStkObjPtr
.ELSE
>SYSCALL2 GetMemPtr
.FIN
sty ZPTmpPtr1
* clc
adc SKT.Cache+S.SOCKET.TCP.OUTHEAD+1
sta ZPTmpPtr1+1
ldy SKT.Cache+S.SOCKET.TCP.OUTHEAD
jsr SKT.GetNotDataInLen
pha
.1 .DO AUXPIPE=1
sta SETWRITEAUX
.FIN
.2 inx
bne .3
pla
inc
beq .8
pha
.3 lda (ZPDataInPtr)
sta (ZPTmpPtr1),y
inc ZPDataInPtr
bne .4
inc ZPDataInPtr+1
.4 iny
bne .2
inc ZPTmpPtr1+1
.DO AUXPIPE=1
sta CLRWRITEAUX
.FIN
inc SKT.Cache+S.SOCKET.TCP.OUTHEAD+1
lda SKT.Cache+S.SOCKET.TCP.OUTHEAD+1
cmp /K.TCP.WSIZE
bne .1
stz SKT.Cache+S.SOCKET.TCP.OUTHEAD+1
lda ZPTmpPtr1+1
* sec
sbc /K.TCP.WSIZE
sta ZPTmpPtr1+1
bra .1
.8 .DO AUXPIPE=1
sta CLRWRITEAUX
.FIN
sty SKT.Cache+S.SOCKET.TCP.OUTHEAD
* >SBC16 SKT.Cache+S.SOCKET.TCP.OUTFREE,ZPDataInLen
ldx #S.SOCKET.TCP.OUTFREE
jsr SKT.SubDataInLenAtSktX
* >ADC16 SKT.Cache+S.SOCKET.TCP.OUTUSED,ZPDataInLen
ldx #S.SOCKET.TCP.OUTUSED
jsr SKT.AddDataInLenAtSktX
* >ADC16 SKT.Cache+S.SOCKET.TCP.OUTTOSEND,ZPDataInLen
ldx #S.SOCKET.TCP.OUTTOSEND
jsr SKT.AddDataInLenAtSktX
jsr SKT.StoreTCB
>LDYA ZPDataInLen
clc
rts
*--------------------------------------
SKT.AddDataInLenAtSktX
clc
lda SKT.Cache,x
adc ZPDataInLen
sta SKT.Cache,x
inx
lda SKT.Cache,x
adc ZPDataInLen+1
sta SKT.Cache,x
rts
*--------------------------------------
SKT.SubDataInLenAtSktX
sec
lda SKT.Cache,x
sbc ZPDataInLen
sta SKT.Cache,x
inx
lda SKT.Cache,x
sbc ZPDataInLen+1
sta SKT.Cache,x
rts
*--------------------------------------
* From TCP.OUT
* Src : hOutMem/OUTTAIL
* Dst : ZPDataOutPtr/ZPDataOutLen
*--------------------------------------
SKT.GetDataFromSktOut
ldy #S.SOCKET.SQ.hOutMem
lda (ZPPtrSKT),y
.DO AUXPIPE=1
>SYSCALL2 GetStkObjPtr
.ELSE
>SYSCALL2 GetMemPtr
.FIN
sty ZPTmpPtr1
* clc
adc SKT.Cache+S.SOCKET.TCP.OUTTAILSENT+1
sta ZPTmpPtr1+1
lda ZPDataOutLen
eor #$FF
tax
lda ZPDataOutLen+1
eor #$FF
pha
.DO AUXPIPE=1
jsr SKT.SetupZPCode
.FIN
ldy SKT.Cache+S.SOCKET.TCP.OUTTAILSENT
.1 inx
bne .2
pla
inc
beq .8
pha
.2 .DO AUXPIPE=1
jsr ZPCode
.ELSE
lda (ZPTmpPtr1),y
.FIN
sta (ZPDataOutPtr)
inc ZPDataOutPtr
bne .3
inc ZPDataOutPtr+1
.3 iny
bne .1
inc ZPTmpPtr1+1
inc SKT.Cache+S.SOCKET.TCP.OUTTAILSENT+1
lda SKT.Cache+S.SOCKET.TCP.OUTTAILSENT+1
cmp /K.TCP.WSIZE
bne .1
stz SKT.Cache+S.SOCKET.TCP.OUTTAILSENT+1
lda ZPTmpPtr1+1
* sec
sbc /K.TCP.WSIZE
sta ZPTmpPtr1+1
bra .1
.8 sty SKT.Cache+S.SOCKET.TCP.OUTTAILSENT
>SBC16 SKT.Cache+S.SOCKET.TCP.OUTTOSEND,ZPDataOutLen
clc
rts
*/--------------------------------------
* # RecvFrom (RAW,DGRAM,SEQPKT)
* ## C
* `hMem recvfrom(hFD fd, struct sockaddr *addr);`
* ## ASM
* **In:**
* `>PUSHB fd`
* `>PUSHW addr` (RecvFrom)
* `>LIBCALL hLIBTCPIP,LIBTCPIP.Recv`
* ## RETURN VALUE
* CC: A = hMem
* CS: A = EC
*\--------------------------------------
SKT.RecvFrom >PULLW ZPTmpPtr1 addr
>PULLA
sec
.HS 90 BCC
*/--------------------------------------
* # Recv (RAW,DGRAM,SEQPKT)
* ## C
* `hMem recv(hFD fd);`
* ## ASM
* **In:**
* `lda fd`
* `>LIBCALL hLIBTCPIP,LIBTCPIP.Recv`
* ## RETURN VALUE
* CC: A = hMem
* CS: A = EC
*\--------------------------------------
SKT.Recv clc
php
jsr SKT.GetFD
ldy #S.SOCKET.T
lda (ZPPtrSKT),y
cmp #S.SOCKET.T.SEQPKT
bcc .10 RAW,DGRAM
bne .99 STREAM
jsr SKT.GetFromQueue SEQPKT
bcc .1
jsr SKT.CheckTCP
bcs .91
.90 lda #E.NODATA
.91 plp
sec
rts
.10 jsr SKT.GetFromQueue
bcs .90
.1 plp if CS, RecvFrom
bcc .9 CC, Recv : Exit with CC and A=hFrame
pha
>SYSCALL2 GetMemPtr
>STYA ZPFrameInPtr
ldy #S.IP.SRC
.2 lda (ZPFrameInPtr),y
sta SA.REMOTE+S.SOCKADDR.ADDR-S.IP.SRC,y
iny
cpy #S.IP.SRC+4
bne .2
ldy #S.IP.PROTOCOL
lda (ZPFrameInPtr),y
cmp #S.IP.PROTOCOL.ICMP
bne .3
ldy #S.ICMP.IDENTIFIER
bra .7
.3 cmp #S.IP.PROTOCOL.TCP
beq .6
cmp #S.IP.PROTOCOL.UDP
bne .8
.6 ldy #S.TCPUDP.SRCPORT
.7 lda (ZPFrameInPtr),y
sta SA.REMOTE+S.SOCKADDR+1
iny
lda (ZPFrameInPtr),y
sta SA.REMOTE+S.SOCKADDR
.8 ldy #S.SOCKADDR-1
.80 lda SA.REMOTE,y
sta (ZPTmpPtr1),y
dey
bpl .80
pla
clc
.9 rts
.99 lda #ERR.SKT.BAD
plp
sec
rts
*/--------------------------------------
* # SendTo (RAW,DGRAM,SEQPKT)
* ## C
* `int skt.sendto(hFD fd, const void *buf, int count, const struct sockaddr *addr);`
* ## ASM
* **In:**
* `>PUSHB fd`
* `>PUSHW buf`
* `>PUSHWI count`
* `>PUSHW addr`
* `>LIBCALL hLIBTCPIP,LIBTCPIP.sendto`
* ## RETURN VALUE
* CC: Y,A = bytes written
* CS: A = EC
*\--------------------------------------
SKT.SendTo jsr SKT.PullRemAddr
*/--------------------------------------
* # Send (RAW,DGRAM,SEQPKT)
* ## C
* `int skt.send(hFD fd, const void *buf, int count);`
* ## ASM
* **In:**
* `>PUSHB fd`
* `>PUSHW buf`
* `>PUSHWI count`
* `>LIBCALL hLIBTCPIP,LIBTCPIP.send`
* ## RETURN VALUE
* CC: Y,A = bytes written
* CS: A = EC
*\--------------------------------------
SKT.Send jsr SKT.PullhFDDataInPtrLen
ldy #S.SOCKET.T
lda (ZPPtrSKT),y
tax
jmp (J.SKT.send,x)
*--------------------------------------
SKT.Send.RAW ldy #S.SOCKET.PROTO
lda (ZPPtrSKT),y
tax
>LDYA ZPDataInLen
jsr FRM.NewIP
bcc SKT.Send.8
rts
*--------------------------------------
SKT.Send.DGRAM ldx #S.IP.PROTOCOL.UDP
>LDYA ZPDataInLen
jsr FRM.NewIP
bcs SKT.Send.9
jsr SKT.SetFrameOutTCPUDPPorts
SKT.Send.8 jsr SKT.SetFrameOutDstIP
jsr SKT.CopyDataInToOut
clc Queue if fail
jmp FRM.SendIP
*--------------------------------------
SKT.Send.SEQPKT jsr SKT.CheckTCP
bcs SKT.Send.9
>LDYA ZPDataInLen
jsr TCP.NewFrame
bcs SKT.Send.9
jsr SKT.GetTCB
jsr SKT.CopyDataInToOut
jmp TCP.OUT.SEQSEND
*--------------------------------------
SKT.Send.STREAM lda #ERR.SKT.BAD
sec
SKT.Send.9 rts
*/--------------------------------------
* # GetSockOpt
* Set Socket Options
* ## C
* `int getsockopt(hFD fd);`
* ## ASM
* **In:**
* `lda fd`
* `>LIBCALL hLIBTCPIP,LIBTCPIP.GetSockOpt`
* ## RETURN VALUE
*\--------------------------------------
SKT.getsockopt jsr SKT.GetFD
ldy #S.SOCKET.O
lda (ZPPtrSKT),y
* clc
rts
*/--------------------------------------
* # SetSockOpt
* Set Socket Options
* ## C
* `int setsockopt(hFD fd, short int opts);`
* ## ASM
* **In:**
* `>PUSHB fd`
* `>PUSHB opts`
* `>LIBCALL hLIBTCPIP,LIBTCPIP.SetSockOpt`
* ## RETURN VALUE
*\--------------------------------------
SKT.setsockopt >PULLA
pha
jsr SKT.PullhFD
pla
ldy #S.SOCKET.O
sta (ZPPtrSKT),y
* clc
rts
*/--------------------------------------
* # EOF
* End Of File
* ## C
* `int eof(hFD fd);`
* ## ASM
* **In:**
* `lda fd`
* `>LIBCALL hLIBTCPIP,LIBTCPIP.EOF`
* ## RETURN VALUE
* CC : A = 0 if some data, A = $ff if EOF
* CS : A = Socket Error
*\--------------------------------------
SKT.EOF jsr SKT.GetFD
ldy #S.SOCKET.TCP.INUSED
lda (ZPPtrSKT),y
iny
ora (ZPPtrSKT),y
bne .8 some DATA...
jsr SKT.CheckStream
bcs .9
lda #$ff no DATA, EOF = true
* clc
rts
.8 lda #0 ...EOF = false
* clc
.9 rts
*--------------------------------------
SKT.CheckStream lda #S.SOCKET.T.STREAM
ldy #S.SOCKET.T
cmp (ZPPtrSKT),y
bne SKT.BAD
SKT.CheckTCP ldy #S.SOCKET.O
lda (ZPPtrSKT),y
and #S.SOCKET.O.ACCEPTCONN
bne SKT.BAD
ldy #S.SOCKET.TCP.S
lda (ZPPtrSKT),y
cmp #S.SOCKET.TCP.S.ESTBLSH
beq .8
bcc .9
lda #MLI.E.IO
* sec
rts
.8 lda #0
clc
rts
.9 lda #ERR.SKT.NOCONN
sec
rts
SKT.BAD lda #ERR.SKT.BAD
sec
rts
*/--------------------------------------
* # GetTable
* Get socket table
* ## C
* `void * gettable();`
* ## ASM
* **In:**
* `>LIBCALL hLIBTCPIP,LIBTCPIP.GetTable`
* ## RETURN VALUE
*\--------------------------------------
SKT.GetTable >LDYA L.SKT.Table
clc
rts
*--------------------------------------
SKT.PullhFDDataInPtrLen
>PULLW ZPDataInLen !!!use DataInPtr/Len
>PULLW ZPDataInPtr !!!DataOut trashed when sending ACK in TCP.OUT
SKT.PullhFD >PULLA
SKT.GetFD >SYSCALL2 GetMemPtr
>STYA ZPPtrSKT
rts
*--------------------------------------
SKT.PullLocAddr clc
.HS B0 BCS
*--------------------------------------
SKT.PullRemAddr sec
>PULLW ZPTmpPtr1
ldy #S.SOCKADDR-1
ldx #S.SOCKADDR-1
bcc .1
ldx #S.SOCKADDR+S.SOCKADDR-1
.1 lda (ZPTmpPtr1),y
sta SKT.LOC.ADDR,x
dex
dey
bpl .1
rts
*--------------------------------------
SKT.SetLocAddr ldy #S.SOCKET.LOC.PORT+1
.1 lda SKT.LOC.ADDR+S.SOCKADDR.ADDR-S.SOCKET.LOC.ADDR,y
sta (ZPPtrSKT),y
dey
cpy #S.SOCKET.LOC.ADDR
bcs .1
rts
*--------------------------------------
SKT.SetRemAddr ldy #S.SOCKET.REM.PORT+1
.1 lda SKT.REM.ADDR+S.SOCKADDR.ADDR-S.SOCKET.REM.ADDR,y
sta (ZPPtrSKT),y
dey
cpy #S.SOCKET.REM.ADDR
bcs .1
rts
*--------------------------------------
* SKT.REM.ADDR = Incoming Frame SRC
* SKT.LOC.ADDR = Incoming Frame DST
*--------------------------------------
SKT.FindMatchingLocRem
ldx #0
.1 lda SKT.TABLE,x
beq .8
phx
jsr SKT.GetFD
plx
ldy #S.SOCKET.AF
lda (ZPPtrSKT),y
cmp #AF.INET
bne .8
ldy #S.SOCKET.PROTO
lda (ZPPtrSKT),y
ldy #S.IP.PROTOCOL
cmp (ZPFrameInPtr),y
bne .8
ldy #S.SOCKET.LOC.ADDR
.2 lda (ZPPtrSKT),y
bne .4
ldy #S.SOCKET.LOC.PORT bound to 0.0.0.0,check only LOC port
.3 lda (ZPPtrSKT),y
.4 cmp SKT.LOC.ADDR+S.SOCKADDR.ADDR-S.SOCKET.LOC.ADDR,y
bne .8
iny
cpy #S.SOCKET.LOC.PORT+2
bne .3
ldy #S.SOCKET.O
lda (ZPPtrSKT),y
and #S.SOCKET.O.ACCEPTCONN
beq .6
ldy #S.TCP.OPTIONS Listening, only SYN packet....
lda (ZPFrameInPtr),y
cmp #S.TCP.OPTIONS.SYN
beq .7 SYN received on a LISTEN socket, ok
bne .8 bad packet for this listening
.6 lda SKT.REM.ADDR+S.SOCKADDR.ADDR
cmp #$ff incoming frame is FF.FF.FF.FF, Broadcast ?
bne .41
* ldy #S.SOCKET.O
lda (ZPPtrSKT),y
and #S.SOCKET.O.BROADCAST
bne .43
* sec
rts this socket does not accept broadcast
.41 ldy #S.SOCKET.REM.ADDR
lda (ZPPtrSKT),y
bne .44
.43 ldy #S.SOCKET.REM.PORT Frame is Broadcast, or listening is 0.0.0.0 check port only
.42 lda (ZPPtrSKT),y
.44 cmp SKT.REM.ADDR+S.SOCKADDR.ADDR-S.SOCKET.REM.ADDR,y
bne .8 wrong remote host, exit....
iny
cpy #S.SOCKET.REM.PORT+2
bne .42
.7 clc x = SKT.TABLE index
rts
.8 inx
cpx #K.SKTTABLE.SIZE
bne .1
* sec
rts
*--------------------------------------
SKT.AddToQueueA pha
ldy #S.SOCKET.HQ.HEAD
lda (ZPPtrSKT),y
tax
inc
cmp #S.SOCKET.HQ.MAX
bne .1
lda #0
.1 dey #S.SOCKET.HQ.TAIL
cmp (ZPPtrSKT),y
beq .9 Queue full!!
iny #S.SOCKET.HQ.HEAD
sta (ZPPtrSKT),y
txa
clc
adc #S.SOCKET.HQ
tay
pla
sta (ZPPtrSKT),y
clc
rts
.9 pla dicard hFrame
* sec
rts
*--------------------------------------
SKT.NewTCB ldx #S.SOCKET.TCP.INSEQNUM
.1 stz SKT.Cache,x
inx
cpx #S.SOCKET.TCP
bne .1
ldx #3
.2 lda A2osX.TIMER16,x
sta SKT.Cache+S.SOCKET.TCP.OUTNEXTSEQ,x
dex
bpl .2
ldy #S.SOCKET.T
lda (ZPPtrSKT),y
cmp #S.SOCKET.T.SEQPKT
bcc .8
tax
>LDYAI K.TCP.WSIZE
>STYA SKT.Cache+S.SOCKET.TCP.INFREE
cpx #S.SOCKET.T.STREAM
bcc .8
.DO AUXPIPE=1
>SYSCALL2 NewStkObj
.ELSE
>SYSCALL2 getmem
.FIN
bcs .9
txa
ldy #S.SOCKET.SQ.hInMem
sta (ZPPtrSKT),y
>LDYAI K.TCP.WSIZE
>STYA SKT.Cache+S.SOCKET.TCP.OUTFREE
.DO AUXPIPE=1
>SYSCALL2 NewStkObj
.ELSE
>SYSCALL2 getmem
.FIN
bcs .9
txa
ldy #S.SOCKET.SQ.hOutMem
sta (ZPPtrSKT),y
.8
* clc
.9 rts
*--------------------------------------
SKT.GetTCB ldy #S.SOCKET.TCP.INSEQNUM
.1 lda (ZPPtrSKT),y
sta SKT.Cache,y
iny
cpy #S.SOCKET.TCP
bne .1
rts
*--------------------------------------
SKT.StoreTCB.S ldy #S.SOCKET.TCP.S
sta (ZPPtrSKT),y
SKT.StoreTCB ldy #S.SOCKET.TCP.INSEQNUM
.1 lda SKT.Cache,y
sta (ZPPtrSKT),y
iny
cpy #S.SOCKET.TCP
bne .1
clc
rts
*--------------------------------------
SKT.SetFrameOutDstIP
ldx #3
ldy #S.SOCKET.REM.ADDR
lda (ZPPtrSKT),y
beq .3 Socket Bound to 0.0.0.0...
.1 lda (ZPPtrSKT),y
pha
iny
dex
bpl .1
ldy #S.IP.DST+3
ldx #3
.2 pla
sta (ZPFrameOutPtr),y
dey
dex
bpl .2
rts
.3 ldy #S.IP.DST+3 ...sent to provided SentTo ADDR
.4 lda SKT.REM.ADDR+S.SOCKADDR.ADDR,x
sta (ZPFrameOutPtr),y
dey
dex
bpl .4
rts
*--------------------------------------
SKT.SetFrameOutTCPUDPPorts
ldy #S.SOCKET.LOC.PORT
lda (ZPPtrSKT),y
tax
iny
lda (ZPPtrSKT),y
ldy #S.TCPUDP.SRCPORT
sta (ZPFrameOutPtr),y
iny
txa
sta (ZPFrameOutPtr),y
ldy #S.SOCKET.REM.PORT
lda (ZPPtrSKT),y
beq .1
tax
iny
lda (ZPPtrSKT),y
bra .2
.1 lda SKT.REM.ADDR+S.SOCKADDR.PORT+1
ldx SKT.REM.ADDR+S.SOCKADDR.PORT
.2 ldy #S.TCPUDP.DSTPORT
sta (ZPFrameOutPtr),y
iny
txa
sta (ZPFrameOutPtr),y
rts
*--------------------------------------
SKT.GetNotDataInLen
lda ZPDataInLen
eor #$FF
tax
lda ZPDataInLen+1
eor #$FF
rts
*--------------------------------------
SKT.CopyDataInToOut
lda ZPDataInPtr+1
pha
lda ZPDataOutPtr+1
pha
jsr SKT.GetNotDataInLen
pha
ldy #0
.1 inx
bne .2
pla
inc
beq .9
pha
.2 lda (ZPDataInPtr),y
sta (ZPDataOutPtr),y
iny
bne .1
inc ZPDataInPtr+1
inc ZPDataOutPtr+1
bne .1
.9 pla
sta ZPDataOutPtr+1
pla
sta ZPDataInPtr+1
rts
*--------------------------------------
.DO AUXPIPE=1
SKT.SetupZPCode ldy #ZP.CODE.Len-1
.1 lda ZP.CODE,y
sta ZPCode,y
dey
bpl .1
rts
.FIN
*--------------------------------------
MAN
SAVE usr/src/lib/libtcpip.s.skt
LOAD usr/src/lib/libtcpip.s
ASM
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