1 ! Copyright (C) 2010 Doug Coleman.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors alien.enums alien.syntax arrays calendar
4 combinators combinators.smart constructors destructors endian
5 grouping io io.encodings.binary io.encodings.string
6 io.encodings.utf8 io.sockets io.sockets.private
7 io.streams.byte-array io.timeouts kernel make math math.bitwise
8 math.parser namespaces random sequences slots.syntax splitting
9 system vectors vocabs strings ascii ;
12 : with-input-seek ( n seek-type quot -- )
14 [ seek-input ] dip call
15 ] dip seek-absolute seek-input ; inline
18 { A 1 } { NS 2 } { MD 3 } { MF 4 }
19 { CNAME 5 } { SOA 6 } { MB 7 } { MG 8 }
20 { MR 9 } { NULL 10 } { WKS 11 } { PTR 12 }
21 { HINFO 13 } { MINFO 14 } { MX 15 } { TXT 16 }
22 { RP 17 } { AFSDB 18 } { SIG 24 } { KEY 25 }
23 { AAAA 28 } { LOC 29 } { SRV 33 } { NAPTR 35 }
24 { KX 36 } { CERT 37 } { DNAME 39 } { OPT 41 }
25 { APL 42 } { DS 43 } { SSHFP 44 } { IPSECKEY 45 }
26 { RRSIG 46 } { NSEC 47 } { DNSKEY 48 } { DHCID 49 }
27 { NSEC3 50 } { NSEC3PARAM 51 } { HIP 55 } { SPF 99 }
28 { TKEY 249 } { TSIG 250 } { IXFR 251 }
29 { TA 32768 } { DLV 32769 } ;
31 ENUM: dns-class { IN 1 } { CS 2 } { CH 3 } { HS 4 } ;
33 ENUM: dns-opcode QUERY IQUERY STATUS ;
35 ENUM: dns-rcode NO-ERROR FORMAT-ERROR SERVER-FAILURE
36 NAME-ERROR NOT-IMPLEMENTED REFUSED ;
40 : add-dns-server ( string -- )
41 dns-servers get push ;
43 : remove-dns-server ( string -- )
44 dns-servers get remove! drop ;
46 : clear-dns-servers ( -- )
47 V{ } clone dns-servers set-global ;
49 : >dotted ( domain -- domain' )
50 dup "." tail? [ "." append ] unless ;
52 : dotted> ( string -- string' )
55 TUPLE: query name type class ;
56 CONSTRUCTOR: <query> query ( name type class -- obj )
57 [ >dotted ] change-name ;
59 TUPLE: rr name type class ttl rdata ;
63 TUPLE: mx preference exchange ;
65 TUPLE: soa mname rname serial refresh retry expire minimum ;
67 TUPLE: srv priority weight port target ;
70 CONSTRUCTOR: <a> a ( name -- obj ) ;
73 CONSTRUCTOR: <aaaa> aaaa ( name -- obj ) ;
76 CONSTRUCTOR: <cname> cname ( name -- obj ) ;
79 CONSTRUCTOR: <ptr> ptr ( name -- obj ) ;
82 CONSTRUCTOR: <ns> ns ( name -- obj ) ;
84 TUPLE: message id qr opcode aa tc rd ra z rcode
85 query answer-section authority-section additional-section ;
87 CONSTRUCTOR: <message> message ( query -- obj )
97 [ dup sequence? [ 1array ] unless ] change-query
99 { } >>authority-section
100 { } >>additional-section ;
102 : message>header ( message -- n )
106 [ opcode>> enum>number 11 shift ]
112 [ rcode>> enum>number 0 shift ]
116 : header>message-parts ( n -- qr opcode aa tc rd ra z rcode )
118 [ -15 shift 0b1 bitand ]
119 [ -11 shift 0b111 bitand <dns-opcode> ]
120 [ -10 shift 0b1 bitand ]
121 [ -9 shift 0b1 bitand ]
122 [ -8 shift 0b1 bitand ]
123 [ -7 shift 0b1 bitand ]
124 [ -4 shift 0b111 bitand ]
125 [ 0b1111 bitand <dns-rcode> ]
128 : byte-array>ipv4 ( byte-array -- string )
129 [ number>string ] { } map-as "." join ;
131 : byte-array>ipv6 ( byte-array -- string )
132 2 group [ be> >hex ] { } map-as ":" join ;
134 : ipv4>byte-array ( string -- byte-array )
135 "." split [ string>number ] B{ } map-as ;
137 : ipv6>byte-array ( string -- byte-array )
138 T{ inet6 } inet-pton ;
140 : expand-ipv6 ( ipv6 -- ipv6' ) ipv6>byte-array byte-array>ipv6 ;
142 : reverse-ipv4 ( string -- string )
143 ipv4>byte-array reverse byte-array>ipv4 ;
145 CONSTANT: ipv4-arpa-suffix ".in-addr.arpa"
147 : ipv4>arpa ( string -- string )
148 reverse-ipv4 ipv4-arpa-suffix append ;
150 CONSTANT: ipv6-arpa-suffix ".ip6.arpa"
152 : ipv6>arpa ( string -- string )
154 [ [ -4 shift 4 bits ] [ 4 bits ] bi 2array ] { } map-as
155 B{ } concat-as reverse
156 [ >hex ] { } map-as "." join ipv6-arpa-suffix append ;
158 : trim-ipv4-arpa ( string -- string' )
159 dotted> ipv4-arpa-suffix ?tail drop ;
161 : trim-ipv6-arpa ( string -- string' )
162 dotted> ipv6-arpa-suffix ?tail drop ;
164 : arpa>ipv4 ( string -- ip ) trim-ipv4-arpa reverse-ipv4 ;
166 : arpa>ipv6 ( string -- ip )
167 trim-ipv6-arpa "." split 2 group reverse
169 first2 swap [ hex> ] bi@ [ 4 shift ] [ ] bi* bitor
170 ] B{ } map-as byte-array>ipv6 ;
172 : parse-length-bytes ( byte -- sequence ) read utf8 decode ;
174 : (parse-name) ( -- )
177 8 shift read1 bitor 0x3fff bitand
179 read1 parse-length-bytes , (parse-name)
182 parse-length-bytes , (parse-name)
186 : parse-name ( -- sequence )
187 [ (parse-name) ] { } make "." join ;
189 : parse-query ( -- query )
191 2 read be> <dns-type>
192 2 read be> <dns-class> <query> ;
194 : parse-soa ( -- soa )
202 4 read be> >>minimum ;
206 2 read be> >>preference
207 parse-name >>exchange ;
209 : parse-srv ( -- srv )
211 2 read be> >>priority
214 parse-name >>target ;
216 GENERIC: parse-rdata ( n type -- obj )
218 M: object parse-rdata drop read ;
219 M: A parse-rdata 2drop 4 read byte-array>ipv4 <a> ;
220 M: AAAA parse-rdata 2drop 16 read byte-array>ipv6 <aaaa> ;
221 M: CNAME parse-rdata 2drop parse-name <cname> ;
222 M: MX parse-rdata 2drop parse-mx ;
223 M: NS parse-rdata 2drop parse-name <ns> ;
224 M: PTR parse-rdata 2drop parse-name <ptr> ;
225 M: SOA parse-rdata 2drop parse-soa ;
226 M: SRV parse-rdata 2drop parse-srv ;
231 2 read be> <dns-type> >>type
232 2 read be> <dns-class> >>class
234 2 read be> over type>> parse-rdata >>rdata ;
236 : parse-message ( byte-array -- message )
240 2 read be> header>message-parts set-slots[ qr opcode aa tc rd ra z rcode ]
242 2 read be> >>answer-section
243 2 read be> >>authority-section
244 2 read be> >>additional-section
245 [ [ parse-query ] replicate ] change-query
246 [ [ parse-rr ] replicate ] change-answer-section
247 [ [ parse-rr ] replicate ] change-authority-section
248 [ [ parse-rr ] replicate ] change-additional-section
251 ERROR: unsupported-domain-name string ;
253 : >n/label ( string -- byte-array )
255 [ unsupported-domain-name ] unless
256 [ length 1array ] [ ] bi B{ } append-as ;
258 : >name ( domain -- byte-array )
259 "." split [ >n/label ] map concat ;
261 : query>byte-array ( query -- byte-array )
265 [ type>> enum>number 2 >be ]
266 [ class>> enum>number 2 >be ]
268 ] B{ } append-outputs-as ;
270 GENERIC: rdata>byte-array ( rdata type -- obj )
272 M: A rdata>byte-array drop ipv4>byte-array ;
274 M: CNAME rdata>byte-array drop >name ;
276 M: HINFO rdata>byte-array
279 [ os>> >name ] bi append ;
281 M: MX rdata>byte-array
283 [ preference>> 2 >be ]
284 [ exchange>> >name ] bi append ;
286 M: NS rdata>byte-array drop >name ;
288 M: PTR rdata>byte-array drop >name ;
290 M: SOA rdata>byte-array
302 ] B{ } append-outputs-as ;
304 M: TXT rdata>byte-array
307 : rr>byte-array ( rr -- byte-array )
311 [ type>> enum>number 2 >be ]
312 [ class>> enum>number 2 >be ]
315 [ rdata>> ] [ type>> ] bi rdata>byte-array
316 [ length 2 >be ] [ ] bi append
319 ] B{ } append-outputs-as ;
321 : message>byte-array ( message -- byte-array )
325 [ message>header 2 >be ]
326 [ query>> length 2 >be ]
327 [ answer-section>> length 2 >be ]
328 [ authority-section>> length 2 >be ]
329 [ additional-section>> length 2 >be ]
330 [ query>> [ query>byte-array ] map concat ]
331 [ answer-section>> [ rr>byte-array ] map concat ]
332 [ authority-section>> [ rr>byte-array ] map concat ]
333 [ additional-section>> [ rr>byte-array ] map concat ]
335 ] B{ } append-outputs-as ;
337 : udp-query ( bytes server -- bytes' )
339 10 seconds over set-timeout
340 [ send ] [ receive drop ] bi
341 ] with-any-port-local-datagram ;
343 : <dns-inet4> ( -- inet4 )
344 dns-servers get random 53 <inet4> ;
346 : dns-query ( name type class -- message )
347 <query> <message> message>byte-array
348 <dns-inet4> udp-query parse-message ;
350 : dns-A-query ( name -- message ) A IN dns-query ;
351 : dns-AAAA-query ( name -- message ) AAAA IN dns-query ;
352 : dns-MX-query ( name -- message ) MX IN dns-query ;
353 : dns-NS-query ( name -- message ) NS IN dns-query ;
354 : dns-TXT-query ( name -- message ) TXT IN dns-query ;
355 : dns-SRV-query ( name -- message ) SRV IN dns-query ;
357 : read-TXT-strings ( byte-array -- strings )
359 binary <byte-reader> [
360 [ read1 [ read , t ] [ f ] if* ] loop
364 : TXT-message>strings ( message -- strings )
367 read-TXT-strings [ utf8 decode ] map
371 dns-TXT-query TXT-message>strings [ [ write ] each nl ] each ;
373 : reverse-lookup ( reversed-ip -- message )
376 : reverse-ipv4-lookup ( ip -- message )
377 ipv4>arpa reverse-lookup ;
379 : reverse-ipv6-lookup ( ip -- message )
380 ipv6>arpa reverse-lookup ;
382 : message>names ( message -- names )
383 answer-section>> [ rdata>> name>> ] map ;
385 : filter-message-rdata>names ( message quot -- names )
386 [ answer-section>> [ rdata>> ] map ] dip filter [ name>> ] map ; inline
388 : message>a-names ( message -- names )
389 [ a? ] filter-message-rdata>names ;
391 : message>aaaa-names ( message -- names )
392 [ aaaa? ] filter-message-rdata>names ;
394 : message>mxs ( message -- assoc )
395 answer-section>> [ rdata>> [ preference>> ] [ exchange>> ] bi 2array ] map ;
397 : messages>names ( messages -- names )
398 [ message>names ] map concat ;
400 : forward-confirmed-reverse-dns-ipv4? ( ipv4-string -- ? )
401 dup reverse-ipv4-lookup message>names
402 [ dns-A-query ] map messages>names member? ;
404 : forward-confirmed-reverse-dns-ipv6? ( ipv6-string -- ? )
406 dup reverse-ipv6-lookup message>names
407 [ dns-AAAA-query ] map messages>names member? ;
409 : message>query-name ( message -- string )
410 query>> first name>> dotted> ;
412 ! XXX: Turn on someday for nonblocking DNS lookups
413 ! M: string resolve-host
414 ! dup >lower "localhost" = [
415 ! drop resolve-localhost
417 ! dns-A-query message>a-names [ <ipv4> ] map
420 HOOK: initial-dns-servers os ( -- sequence )
423 { [ os windows? ] [ "dns.windows" ] }
424 { [ os unix? ] [ "dns.unix" ] }
427 : with-dns-servers ( servers quot -- )
428 [ dns-servers ] dip with-variable ; inline
430 dns-servers [ initial-dns-servers >vector ] initialize