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 grouping
5 io io.binary 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 nested-comments random sequences
9 slots.syntax splitting system vectors vocabs strings
13 : with-input-seek ( n seek-type quot -- )
15 [ seek-input ] dip call
16 ] dip seek-absolute seek-input ; inline
19 { A 1 } { NS 2 } { MD 3 } { MF 4 }
20 { CNAME 5 } { SOA 6 } { MB 7 } { MG 8 }
21 { MR 9 } { NULL 10 } { WKS 11 } { PTR 12 }
22 { HINFO 13 } { MINFO 14 } { MX 15 } { TXT 16 }
23 { RP 17 } { AFSDB 18 } { SIG 24 } { KEY 25 }
24 { AAAA 28 } { LOC 29 } { SVR 33 } { NAPTR 35 }
25 { KX 36 } { CERT 37 } { DNAME 39 } { OPT 41 }
26 { APL 42 } { DS 43 } { SSHFP 44 } { IPSECKEY 45 }
27 { RRSIG 46 } { NSEC 47 } { DNSKEY 48 } { DHCID 49 }
28 { NSEC3 50 } { NSEC3PARAM 51 } { HIP 55 } { SPF 99 }
29 { TKEY 249 } { TSIG 250 } { IXFR 251 }
30 { TA 32768 } { DLV 32769 } ;
32 ENUM: dns-class { IN 1 } { CS 2 } { CH 3 } { HS 4 } ;
34 ENUM: dns-opcode QUERY IQUERY STATUS ;
36 ENUM: dns-rcode NO-ERROR FORMAT-ERROR SERVER-FAILURE
37 NAME-ERROR NOT-IMPLEMENTED REFUSED ;
41 : add-dns-server ( string -- )
42 dns-servers get push ;
44 : remove-dns-server ( string -- )
45 dns-servers get remove! drop ;
47 : clear-dns-servers ( -- )
48 V{ } clone dns-servers set-global ;
50 : >dotted ( domain -- domain' )
51 dup "." tail? [ "." append ] unless ;
53 : dotted> ( string -- string' )
56 TUPLE: query name type class ;
57 CONSTRUCTOR: <query> query ( name type class -- obj )
58 [ >dotted ] change-name ;
60 TUPLE: rr name type class ttl rdata ;
64 TUPLE: mx preference exchange ;
66 TUPLE: soa mname rname serial refresh retry expire minimum ;
69 CONSTRUCTOR: <a> a ( name -- obj ) ;
72 CONSTRUCTOR: <aaaa> aaaa ( name -- obj ) ;
75 CONSTRUCTOR: <cname> cname ( name -- obj ) ;
78 CONSTRUCTOR: <ptr> ptr ( name -- obj ) ;
81 CONSTRUCTOR: <ns> ns ( name -- obj ) ;
83 TUPLE: message id qr opcode aa tc rd ra z rcode
84 query answer-section authority-section additional-section ;
86 CONSTRUCTOR: <message> message ( query -- obj )
96 [ dup sequence? [ 1array ] unless ] change-query
98 { } >>authority-section
99 { } >>additional-section ;
101 : message>header ( message -- n )
105 [ opcode>> enum>number 11 shift ]
111 [ rcode>> enum>number 0 shift ]
115 : header>message-parts ( n -- qr opcode aa tc rd ra z rcode )
117 [ -15 shift 0b1 bitand ]
118 [ -11 shift 0b111 bitand <dns-opcode> ]
119 [ -10 shift 0b1 bitand ]
120 [ -9 shift 0b1 bitand ]
121 [ -8 shift 0b1 bitand ]
122 [ -7 shift 0b1 bitand ]
123 [ -4 shift 0b111 bitand ]
124 [ 0b1111 bitand <dns-rcode> ]
127 : byte-array>ipv4 ( byte-array -- string )
128 [ number>string ] { } map-as "." join ;
130 : byte-array>ipv6 ( byte-array -- string )
131 2 group [ be> >hex ] { } map-as ":" join ;
133 : ipv4>byte-array ( string -- byte-array )
134 "." split [ string>number ] B{ } map-as ;
136 : ipv6>byte-array ( string -- byte-array )
137 T{ inet6 } inet-pton ;
139 : expand-ipv6 ( ipv6 -- ipv6' ) ipv6>byte-array byte-array>ipv6 ;
141 : reverse-ipv4 ( string -- string )
142 ipv4>byte-array reverse byte-array>ipv4 ;
144 CONSTANT: ipv4-arpa-suffix ".in-addr.arpa"
146 : ipv4>arpa ( string -- string )
147 reverse-ipv4 ipv4-arpa-suffix append ;
149 CONSTANT: ipv6-arpa-suffix ".ip6.arpa"
151 : ipv6>arpa ( string -- string )
153 [ [ -4 shift 4 bits ] [ 4 bits ] bi 2array ] { } map-as
154 B{ } concat-as reverse
155 [ >hex ] { } map-as "." join ipv6-arpa-suffix append ;
157 : trim-ipv4-arpa ( string -- string' )
158 dotted> ipv4-arpa-suffix ?tail drop ;
160 : trim-ipv6-arpa ( string -- string' )
161 dotted> ipv6-arpa-suffix ?tail drop ;
163 : arpa>ipv4 ( string -- ip ) trim-ipv4-arpa reverse-ipv4 ;
165 : arpa>ipv6 ( string -- ip )
166 trim-ipv6-arpa "." split 2 group reverse
168 first2 swap [ hex> ] bi@ [ 4 shift ] [ ] bi* bitor
169 ] B{ } map-as byte-array>ipv6 ;
171 : parse-length-bytes ( byte -- sequence ) read utf8 decode ;
173 : (parse-name) ( -- )
176 8 shift read1 bitor 0x3fff bitand
178 read1 parse-length-bytes , (parse-name)
181 parse-length-bytes , (parse-name)
185 : parse-name ( -- sequence )
186 [ (parse-name) ] { } make "." join ;
188 : parse-query ( -- query )
190 2 read be> <dns-type>
191 2 read be> <dns-class> <query> ;
193 : parse-soa ( -- soa )
201 4 read be> >>minimum ;
205 2 read be> >>preference
206 parse-name >>exchange ;
208 GENERIC: parse-rdata ( n type -- obj )
210 M: object parse-rdata drop read ;
211 M: A parse-rdata 2drop 4 read byte-array>ipv4 <a> ;
212 M: AAAA parse-rdata 2drop 16 read byte-array>ipv6 <aaaa> ;
213 M: CNAME parse-rdata 2drop parse-name <cname> ;
214 M: MX parse-rdata 2drop parse-mx ;
215 M: NS parse-rdata 2drop parse-name <ns> ;
216 M: PTR parse-rdata 2drop parse-name <ptr> ;
217 M: SOA parse-rdata 2drop parse-soa ;
222 2 read be> <dns-type> >>type
223 2 read be> <dns-class> >>class
225 2 read be> over type>> parse-rdata >>rdata ;
227 : parse-message ( byte-array -- message )
231 2 read be> header>message-parts set-slots[ qr opcode aa tc rd ra z rcode ]
233 2 read be> >>answer-section
234 2 read be> >>authority-section
235 2 read be> >>additional-section
236 [ [ parse-query ] replicate ] change-query
237 [ [ parse-rr ] replicate ] change-answer-section
238 [ [ parse-rr ] replicate ] change-authority-section
239 [ [ parse-rr ] replicate ] change-additional-section
242 ERROR: unsupported-domain-name string ;
244 : >n/label ( string -- byte-array )
246 [ unsupported-domain-name ] unless
247 [ length 1array ] [ ] bi B{ } append-as ;
249 : >name ( domain -- byte-array )
250 "." split [ >n/label ] map concat ;
252 : query>byte-array ( query -- byte-array )
256 [ type>> enum>number 2 >be ]
257 [ class>> enum>number 2 >be ]
259 ] B{ } append-outputs-as ;
261 GENERIC: rdata>byte-array ( rdata type -- obj )
263 M: A rdata>byte-array drop ipv4>byte-array ;
265 M: CNAME rdata>byte-array drop >name ;
267 M: HINFO rdata>byte-array
270 [ os>> >name ] bi append ;
272 M: MX rdata>byte-array
274 [ preference>> 2 >be ]
275 [ exchange>> >name ] bi append ;
277 M: NS rdata>byte-array drop >name ;
279 M: PTR rdata>byte-array drop >name ;
281 M: SOA rdata>byte-array
293 ] B{ } append-outputs-as ;
295 M: TXT rdata>byte-array
298 : rr>byte-array ( rr -- byte-array )
302 [ type>> enum>number 2 >be ]
303 [ class>> enum>number 2 >be ]
306 [ rdata>> ] [ type>> ] bi rdata>byte-array
307 [ length 2 >be ] [ ] bi append
310 ] B{ } append-outputs-as ;
312 : message>byte-array ( message -- byte-array )
316 [ message>header 2 >be ]
317 [ query>> length 2 >be ]
318 [ answer-section>> length 2 >be ]
319 [ authority-section>> length 2 >be ]
320 [ additional-section>> length 2 >be ]
321 [ query>> [ query>byte-array ] map concat ]
322 [ answer-section>> [ rr>byte-array ] map concat ]
323 [ authority-section>> [ rr>byte-array ] map concat ]
324 [ additional-section>> [ rr>byte-array ] map concat ]
326 ] B{ } append-outputs-as ;
328 : udp-query ( bytes server -- bytes' )
329 f 0 <inet4> <datagram>
330 10 seconds over set-timeout [
331 [ send ] [ receive drop ] bi
334 : <dns-inet4> ( -- inet4 )
335 dns-servers get random 53 <inet4> ;
337 : dns-query ( name type class -- message )
338 <query> <message> message>byte-array
339 <dns-inet4> udp-query parse-message ;
341 : dns-A-query ( name -- message ) A IN dns-query ;
342 : dns-AAAA-query ( name -- message ) AAAA IN dns-query ;
343 : dns-MX-query ( name -- message ) MX IN dns-query ;
344 : dns-NS-query ( name -- message ) NS IN dns-query ;
345 : dns-TXT-query ( name -- message ) TXT IN dns-query ;
347 : read-TXT-strings ( byte-array -- strings )
349 binary <byte-reader> [
350 [ read1 [ read , t ] [ f ] if* ] loop
354 : TXT-message>strings ( message -- strings )
357 read-TXT-strings [ utf8 decode ] map
361 dns-TXT-query TXT-message>strings [ [ write ] each nl ] each ;
363 : reverse-lookup ( reversed-ip -- message )
366 : reverse-ipv4-lookup ( ip -- message )
367 ipv4>arpa reverse-lookup ;
369 : reverse-ipv6-lookup ( ip -- message )
370 ipv6>arpa reverse-lookup ;
372 : message>names ( message -- names )
373 answer-section>> [ rdata>> name>> ] map ;
375 : filter-message-rdata>names ( message quot -- names )
376 [ answer-section>> [ rdata>> ] map ] dip filter [ name>> ] map ; inline
378 : message>a-names ( message -- names )
379 [ a? ] filter-message-rdata>names ;
381 : message>aaaa-names ( message -- names )
382 [ aaaa? ] filter-message-rdata>names ;
384 : message>mxs ( message -- assoc )
385 answer-section>> [ rdata>> [ preference>> ] [ exchange>> ] bi 2array ] map ;
387 : messages>names ( messages -- names )
388 [ message>names ] map concat ;
390 : forward-confirmed-reverse-dns-ipv4? ( ipv4-string -- ? )
391 dup reverse-ipv4-lookup message>names
392 [ dns-A-query ] map messages>names member? ;
394 : forward-confirmed-reverse-dns-ipv6? ( ipv6-string -- ? )
396 dup reverse-ipv6-lookup message>names
397 [ dns-AAAA-query ] map messages>names member? ;
399 : message>query-name ( message -- string )
400 query>> first name>> dotted> ;
403 M: string resolve-host
404 dup >lower "localhost" = [
405 drop resolve-localhost
407 dns-A-query message>a-names [ <ipv4> ] map
411 HOOK: initial-dns-servers os ( -- sequence )
414 { [ os windows? ] [ "dns.windows" ] }
415 { [ os unix? ] [ "dns.unix" ] }
418 : with-dns-servers ( servers quot -- )
419 [ dns-servers ] dip with-variable ; inline
421 dns-servers [ initial-dns-servers >vector ] initialize