mirror of
https://github.com/A2osX/A2osX.git
synced 2024-11-19 12:31:56 +00:00
512 lines
9.1 KiB
Plaintext
512 lines
9.1 KiB
Plaintext
NEW
|
||
AUTO 3,1
|
||
.LIST OFF
|
||
*/--------------------------------------
|
||
* # DNS.Clear
|
||
* Clear DNS Cache
|
||
* **In:**
|
||
* ## RETURN VALUE
|
||
*\--------------------------------------
|
||
DNS.Clear ldx #K.DNSCACHE.SIZE*S.DNSCACHE
|
||
|
||
.1 stz DNS.CACHE-1,x
|
||
dex
|
||
bne .1
|
||
|
||
clc
|
||
rts
|
||
*/--------------------------------------
|
||
* # DNS.Query
|
||
* Query DNS for specified host
|
||
* **In:**
|
||
* PUSHW = PTR to IP to fill with cached data
|
||
* PUSHW = hostname PTR to PSTR
|
||
* ## RETURN VALUE
|
||
* CC: hit: IP filled with address
|
||
* CS: missed
|
||
*\--------------------------------------
|
||
DNS.Query >PULLW ZPPtrDNS Get host string
|
||
>PULLW ZPPtrIP Get IP address to fill
|
||
|
||
DNS.Query.I jsr DNS.FIND.BY.NAME
|
||
bcs DNS.REQUEST
|
||
|
||
lda (ZPCachePtr) get status...
|
||
bpl .9 Pending...
|
||
|
||
lda ZPCachePtr
|
||
clc
|
||
adc #S.DNSCACHE.IP
|
||
sta ZPCachePtr
|
||
bcc .1
|
||
inc ZPCachePtr+1
|
||
|
||
.1 ldy #3
|
||
|
||
.2 lda (ZPCachePtr),y
|
||
sta (ZPPtrIP),y
|
||
dey
|
||
bpl .2
|
||
|
||
clc
|
||
rts
|
||
|
||
.9 lda #ERR.DNS.PENDING
|
||
sec
|
||
rts
|
||
*--------------------------------------
|
||
DNS.REQUEST lda hDNSSocket
|
||
beq .99
|
||
|
||
jsr DNS.CSTR2DNS Y=DNS string len+0
|
||
bcs .99
|
||
|
||
iny
|
||
lda /S.DNS.QTYPE.A
|
||
sta DNS.MSG,y
|
||
iny
|
||
lda #S.DNS.QTYPE.A
|
||
sta DNS.MSG,y
|
||
iny
|
||
lda /S.DNS.QCLASS.IN
|
||
sta DNS.MSG,y
|
||
iny
|
||
lda #S.DNS.QCLASS.IN
|
||
sta DNS.MSG,y
|
||
iny
|
||
|
||
sty DNS.MSG.LEN
|
||
stz DNS.MSG.LEN+1
|
||
|
||
>LDYA A2osX.RANDOM16
|
||
>STYA DNS.MSG.ID
|
||
>STYA DNS.TmpCache+S.DNSCACHE.ID
|
||
|
||
lda #K.DNS.PENDING.TTL
|
||
sta DNS.TmpCache+S.DNSCACHE.TTL
|
||
stz DNS.TmpCache+S.DNSCACHE.TTL+1
|
||
stz DNS.TmpCache+S.DNSCACHE.TTL+2
|
||
stz DNS.TmpCache+S.DNSCACHE.TTL+3
|
||
lda #S.DNSCACHE.STATUS.PENDING
|
||
jsr DNS.ADD.I
|
||
bcs .9
|
||
|
||
jsr DNS.REQUEST.SEND
|
||
bcs .99
|
||
|
||
lda #ERR.DNS.PENDING
|
||
sec
|
||
rts
|
||
|
||
.99 lda #ERR.DNS.ERROR
|
||
sec
|
||
.9 rts
|
||
*--------------------------------------
|
||
DNS.REQUEST.SEND
|
||
>LDYAI UDP.PORT.DNS
|
||
>STYA SA.REMOTE+S.SOCKADDR.PORT
|
||
|
||
ldy #3
|
||
|
||
.1 lda IPCFG+S.IPCFG.DNS1,y
|
||
sta SA.REMOTE+S.SOCKADDR.ADDR,y
|
||
dey
|
||
bpl .1
|
||
|
||
jsr .4
|
||
|
||
ldy #3
|
||
|
||
.2 lda IPCFG+S.IPCFG.DNS2,y
|
||
beq .8
|
||
sta SA.REMOTE+S.SOCKADDR.ADDR,y
|
||
dey
|
||
bpl .2
|
||
|
||
.4 >PUSHW L.SA.REMOTE
|
||
>PUSHW DNS.MSG.LEN
|
||
>PUSHW L.DNS.MSG
|
||
lda hDNSSocket
|
||
jmp SKT.SendTo
|
||
|
||
.8 clc
|
||
rts
|
||
*--------------------------------------
|
||
DNS.CSTR2DNS lda (ZPPtrDNS)
|
||
beq .9
|
||
|
||
>LDYA ZPPtrDNS
|
||
>SYSCALL2 strlen
|
||
|
||
tax
|
||
bne .9
|
||
|
||
cpy #K.DNS.MAXLEN-1
|
||
bcs .9
|
||
lda #0 Ending 0
|
||
sta DNS.MSG.NAME+1,y
|
||
|
||
phy save len for later
|
||
ldx #0
|
||
dey
|
||
|
||
.1 lda (ZPPtrDNS),y
|
||
and #$7f
|
||
cmp #'.'
|
||
beq .3
|
||
|
||
cmp #'A'
|
||
bcc .2
|
||
|
||
cmp #'Z'+1
|
||
bcs .2
|
||
|
||
adc #$20
|
||
|
||
.2 inx
|
||
bra .4
|
||
|
||
.3 txa
|
||
ldx #0
|
||
|
||
.4 sta DNS.MSG.NAME+1,y
|
||
dey
|
||
bpl .1
|
||
|
||
stx DNS.MSG.NAME
|
||
pla Get back Len
|
||
sec +1
|
||
adc #S.DNS-S.UDP compute offset next to NAME
|
||
tay
|
||
* clc
|
||
rts
|
||
|
||
.9 sec
|
||
rts
|
||
*/--------------------------------------
|
||
* # DNS.Add
|
||
* Add a static DNS record
|
||
* **In:**
|
||
* PUSHW = PTR to IP
|
||
* PUSHW = hostname CSTR to Add
|
||
*\--------------------------------------
|
||
DNS.Add >PULLW ZPPtrDNS Get host string
|
||
>PULLW ZPPtrIP Get host IP address
|
||
|
||
ldy #3
|
||
.1 lda (ZPPtrIP),y
|
||
sta DNS.TmpCache+S.DNSCACHE.IP,y
|
||
dey
|
||
bpl .1
|
||
|
||
stz DNS.TmpCache+S.DNSCACHE.TTL
|
||
stz DNS.TmpCache+S.DNSCACHE.TTL+1
|
||
stz DNS.TmpCache+S.DNSCACHE.TTL+2
|
||
stz DNS.TmpCache+S.DNSCACHE.TTL+3
|
||
|
||
lda #S.DNSCACHE.STATUS.RESOLVED+S.DNSCACHE.STATUS.STATIC
|
||
|
||
DNS.ADD.I sta DNS.TmpCache
|
||
jsr DNS.FIND.BY.NAME
|
||
bcc .2 Found, go update...
|
||
|
||
jsr DNS.FIND.FREE
|
||
|
||
>LDYA ZPPtrDNS
|
||
>SYSCALL2 strdup
|
||
bcs .9
|
||
|
||
txa
|
||
ldy #S.DNSCACHE.hNAME
|
||
sta (ZPCachePtr),y
|
||
|
||
.2 lda DNS.TmpCache
|
||
sta (ZPCachePtr)
|
||
|
||
ldy #S.DNSCACHE.ID
|
||
|
||
.3 lda DNS.TmpCache,y
|
||
sta (ZPCachePtr),y
|
||
iny
|
||
cpy #S.DNSCACHE
|
||
bne .3
|
||
|
||
clc
|
||
.9 rts
|
||
*/--------------------------------------
|
||
* # DNS.GetCAche
|
||
* Return a Ptr to DNS Cache Table
|
||
* **In:**
|
||
* ## RETURN VALUE
|
||
* Y,A = PTR to DNS.CACHE
|
||
*\--------------------------------------
|
||
DNS.GetCAche >LDYA L.DNS.CACHE
|
||
>STYA ZPCachePtr
|
||
|
||
clc
|
||
rts
|
||
*--------------------------------------
|
||
DNS.FIND.BY.NAME
|
||
jsr DNS.GetCAche
|
||
|
||
ldx #K.DNSCACHE.SIZE
|
||
.1 lda (ZPCachePtr)
|
||
beq .6 empty DNS cache entry?
|
||
|
||
phx
|
||
>PUSHW ZPPtrDNS
|
||
ldy #S.DNSCACHE.hNAME
|
||
lda (ZPCachePtr),y
|
||
>SYSCALL2 GetMemPtr
|
||
>SYSCALL2 StrCaseCmp
|
||
plx
|
||
bcc .8
|
||
|
||
.6 jsr DNS.NextCache
|
||
|
||
dex
|
||
bne .1
|
||
|
||
sec
|
||
.8 rts
|
||
*--------------------------------------
|
||
DNS.UPDATE.BY.ID
|
||
jsr DNS.GetCAche
|
||
|
||
ldx #K.DNSCACHE.SIZE
|
||
.1 lda (ZPCachePtr)
|
||
beq .6 empty DNS cache entry?
|
||
bmi .6 resolved ?
|
||
|
||
ldy #S.DNSCACHE.ID
|
||
lda (ZPCachePtr),y
|
||
cmp DNS.TmpCache+S.DNSCACHE.ID
|
||
bne .6
|
||
iny
|
||
lda (ZPCachePtr),y
|
||
cmp DNS.TmpCache+S.DNSCACHE.ID+1
|
||
bne .6
|
||
|
||
lda #S.DNSCACHE.STATUS.RESOLVED
|
||
sta (ZPCachePtr)
|
||
ldy #S.DNSCACHE.TTL
|
||
|
||
.2 lda DNS.TmpCache,y
|
||
sta (ZPCachePtr),y
|
||
iny
|
||
cpy #S.DNSCACHE
|
||
bne .2
|
||
|
||
clc
|
||
rts
|
||
|
||
.6 jsr DNS.NextCache
|
||
|
||
dex
|
||
bne .1
|
||
sec
|
||
rts
|
||
*--------------------------------------
|
||
DNS.FIND.FREE jsr DNS.GetCAche
|
||
|
||
lda #$ff
|
||
sta TmpDWord
|
||
sta TmpDWord+1
|
||
sta TmpDWord+2
|
||
sta TmpDWord+3
|
||
|
||
ldx #K.DNSCACHE.SIZE
|
||
.1 lda (ZPCachePtr)
|
||
beq .8 empty DNS cache entry?
|
||
|
||
bit #S.DNSCACHE.STATUS.STATIC+S.DNSCACHE.STATUS.PENDING
|
||
bne .7 Static/Pending.....skip
|
||
phx
|
||
ldy #S.DNSCACHE.TTL
|
||
ldx #3
|
||
sec
|
||
.2 lda TmpDWord,x is saved TTL greater then actual TTL?
|
||
sbc (ZPCachePtr),y
|
||
iny
|
||
dex
|
||
bpl .2
|
||
bcc .6 no,
|
||
ldy #S.DNSCACHE.TTL
|
||
ldx #3
|
||
.3 lda (ZPCachePtr),y Save new lowest TTL
|
||
sta TmpDWord,x
|
||
iny
|
||
dex
|
||
bpl .3
|
||
>LDYA ZPCachePtr
|
||
>STYA ZPTmpPtr1 save lowest TTL slot ...
|
||
.6 plx
|
||
|
||
.7 jsr DNS.NextCache
|
||
|
||
dex
|
||
bne .1 no empty slot found, discard lowest TTL
|
||
|
||
>LDYA ZPTmpPtr1
|
||
>STYA ZPCachePtr
|
||
jsr DNS.FREE
|
||
|
||
.8 clc
|
||
rts
|
||
*--------------------------------------
|
||
DNS.EXPIRE jsr DNS.GetCAche
|
||
|
||
ldx #K.DNSCACHE.SIZE
|
||
.1 lda (ZPCachePtr)
|
||
beq .7 empty DNS cache entry?
|
||
|
||
bit #S.DNSCACHE.STATUS.STATIC
|
||
bne .7
|
||
phx
|
||
|
||
ldy #S.DNSCACHE.TTL
|
||
|
||
ldx #4
|
||
clc
|
||
|
||
.2 lda (ZPCachePtr),y
|
||
sbc #0
|
||
sta (ZPCachePtr),y
|
||
iny
|
||
dex
|
||
bne .2
|
||
|
||
bcs .6
|
||
jsr DNS.FREE
|
||
.6 plx
|
||
|
||
.7 jsr DNS.NextCache
|
||
|
||
.8 dex
|
||
bne .1
|
||
|
||
clc
|
||
rts
|
||
*--------------------------------------
|
||
DNS.FREE ldy #S.DNSCACHE.hNAME
|
||
lda (ZPCachePtr),y
|
||
beq .1
|
||
>SYSCALL2 FreeMem
|
||
.1 lda #0
|
||
sta (ZPCachePtr)
|
||
DNS.FREE.RTS rts
|
||
*--------------------------------------
|
||
DNS.POLL lda hDNSSocket
|
||
beq DNS.FREE.RTS
|
||
|
||
jsr SKT.Recv
|
||
bcs DNS.FREE.RTS
|
||
|
||
sta hFrameIn
|
||
>SYSCALL2 GetMemPtr
|
||
>STYA ZPFrameInPtr
|
||
|
||
ldy #S.DNS.F
|
||
lda (ZPFrameInPtr),y
|
||
and /S.DNS.F.QR
|
||
beq .9
|
||
|
||
ldy #S.DNS.ID
|
||
lda (ZPFrameInPtr),y
|
||
sta DNS.TmpCache+S.DNSCACHE.ID
|
||
iny
|
||
lda (ZPFrameInPtr),y
|
||
sta DNS.TmpCache+S.DNSCACHE.ID+1
|
||
ldy #S.DNS.ANCOUNT+1
|
||
lda (ZPFrameInPtr),y
|
||
beq .9
|
||
pha save Answer count...
|
||
ldy #S.DNS.QDCOUNT+1
|
||
lda (ZPFrameInPtr),y
|
||
|
||
ldy #S.DNS Point to DATA
|
||
|
||
tax
|
||
beq .3 no QUERY to skip
|
||
.1 lda (ZPFrameInPtr),y
|
||
beq .2
|
||
bpl .11 Pointer ?
|
||
iny yes, skip 2 bytes
|
||
iny
|
||
bra .2
|
||
.11 tya
|
||
sec
|
||
adc (ZPFrameInPtr),y Skip LEN+1 bytes
|
||
tay
|
||
bra .1
|
||
.2 iny
|
||
iny
|
||
iny Skip QTYPE & QCLASS
|
||
iny
|
||
iny next pos
|
||
.21 dex skip another QUERY ?
|
||
bne .1
|
||
plx get back answer count
|
||
.3 lda (ZPFrameInPtr),y
|
||
beq .32
|
||
bpl .31 Pointer ?
|
||
iny yes, skip 2 bytes
|
||
iny
|
||
bra .32
|
||
|
||
.31 tya
|
||
sec
|
||
adc (ZPFrameInPtr),y Skip LEN+1 bytes
|
||
tay
|
||
bra .3
|
||
.32 iny skip S.DNS.QTYPE HIGH
|
||
lda (ZPFrameInPtr),y
|
||
cmp #S.DNS.QTYPE.A
|
||
beq .40
|
||
tya
|
||
clc
|
||
adc #7 skip CLASS,TTL+DATALENHIGH
|
||
tay
|
||
sec skip DATALENLO
|
||
adc (ZPFrameInPtr),y add DATALEN
|
||
tay
|
||
dex
|
||
bne .3
|
||
bra .9
|
||
.40 iny skip QCLASS
|
||
iny
|
||
iny next pos
|
||
ldx #3
|
||
.4 lda (ZPFrameInPtr),y
|
||
sta DNS.TmpCache+S.DNSCACHE.TTL,x
|
||
iny
|
||
dex
|
||
bpl .4
|
||
|
||
iny skip DATALEN
|
||
iny
|
||
ldx #0
|
||
.5 lda (ZPFrameInPtr),y
|
||
sta DNS.TmpCache+S.DNSCACHE.IP,x
|
||
iny
|
||
inx
|
||
cpx #4
|
||
bne .5
|
||
jsr DNS.UPDATE.BY.ID
|
||
|
||
.9 jmp FRM.DiscardIn
|
||
*--------------------------------------
|
||
DNS.NextCache lda ZPCachePtr
|
||
clc
|
||
adc #S.DNSCACHE
|
||
sta ZPCachePtr
|
||
bcc .8
|
||
inc ZPCachePtr+1
|
||
|
||
.8 rts
|
||
*--------------------------------------
|
||
MAN
|
||
SAVE usr/src/lib/libtcpip.s.dns
|
||
LOAD usr/src/lib/libtcpip.s
|
||
ASM
|