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.loader ;
13 { A 1 } { NS 2 } { MD 3 } { MF 4 }
14 { CNAME 5 } { SOA 6 } { MB 7 } { MG 8 }
15 { MR 9 } { NULL 10 } { WKS 11 } { PTR 12 }
16 { HINFO 13 } { MINFO 14 } { MX 15 } { TXT 16 }
17 { RP 17 } { AFSDB 18 } { SIG 24 } { KEY 25 }
18 { AAAA 28 } { LOC 29 } { SVR 33 } { NAPTR 35 }
19 { KX 36 } { CERT 37 } { DNAME 39 } { OPT 41 }
20 { APL 42 } { DS 43 } { SSHFP 44 } { IPSECKEY 45 }
21 { RRSIG 46 } { NSEC 47 } { DNSKEY 48 } { DHCID 49 }
22 { NSEC3 50 } { NSEC3PARAM 51 } { HIP 55 } { SPF 99 }
23 { TKEY 249 } { TSIG 250 } { IXFR 251 }
24 { TA 32768 } { DLV 32769 } ;
26 ENUM: dns-class { IN 1 } { CS 2 } { CH 3 } { HS 4 } ;
28 ENUM: dns-opcode QUERY IQUERY STATUS ;
30 ENUM: dns-rcode NO-ERROR FORMAT-ERROR SERVER-FAILURE
31 NAME-ERROR NOT-IMPLEMENTED REFUSED ;
35 : add-dns-server ( string -- )
36 dns-servers get push ;
38 : remove-dns-server ( string -- )
39 dns-servers get remove! drop ;
41 : clear-dns-servers ( -- )
42 V{ } clone dns-servers set-global ;
44 : >dotted ( domain -- domain' )
45 dup "." tail? [ "." append ] unless ;
47 : dotted> ( string -- string' )
50 TUPLE: query name type class ;
51 CONSTRUCTOR: query ( name type class -- obj )
52 [ >dotted ] change-name ;
54 TUPLE: rr name type class ttl rdata ;
58 TUPLE: mx preference exchange ;
60 TUPLE: soa mname rname serial refresh retry expire minimum ;
63 CONSTRUCTOR: a ( name -- obj ) ;
66 CONSTRUCTOR: aaaa ( name -- obj ) ;
69 CONSTRUCTOR: cname ( name -- obj ) ;
72 CONSTRUCTOR: ptr ( name -- obj ) ;
75 CONSTRUCTOR: ns ( name -- obj ) ;
77 TUPLE: message id qr opcode aa tc rd ra z rcode
78 query answer-section authority-section additional-section ;
80 CONSTRUCTOR: message ( query -- obj )
90 [ dup sequence? [ 1array ] unless ] change-query
92 { } >>authority-section
93 { } >>additional-section ;
95 : message>header ( message -- n )
99 [ opcode>> enum>number 11 shift ]
105 [ rcode>> enum>number 0 shift ]
109 : header>message-parts ( n -- qr opcode aa tc rd ra z rcode )
111 [ -15 shift BIN: 1 bitand ]
112 [ -11 shift BIN: 111 bitand <dns-opcode> ]
113 [ -10 shift BIN: 1 bitand ]
114 [ -9 shift BIN: 1 bitand ]
115 [ -8 shift BIN: 1 bitand ]
116 [ -7 shift BIN: 1 bitand ]
117 [ -4 shift BIN: 111 bitand ]
118 [ BIN: 1111 bitand <dns-rcode> ]
121 : byte-array>ipv4 ( byte-array -- string )
122 [ number>string ] { } map-as "." join ;
124 : byte-array>ipv6 ( byte-array -- string )
125 2 group [ be> >hex ] { } map-as ":" join ;
127 : ipv4>byte-array ( string -- byte-array )
128 "." split [ string>number ] B{ } map-as ;
130 : ipv6>byte-array ( string -- byte-array )
131 T{ inet6 } inet-pton ;
133 : expand-ipv6 ( ipv6 -- ipv6' ) ipv6>byte-array byte-array>ipv6 ;
135 : reverse-ipv4 ( string -- string )
136 ipv4>byte-array reverse byte-array>ipv4 ;
138 CONSTANT: ipv4-arpa-suffix ".in-addr.arpa"
140 : ipv4>arpa ( string -- string )
141 reverse-ipv4 ipv4-arpa-suffix append ;
143 CONSTANT: ipv6-arpa-suffix ".ip6.arpa"
145 : ipv6>arpa ( string -- string )
146 ipv6>byte-array [ [ -4 shift 4 bits ] [ 4 bits ] bi 2array ] { } map-as
147 B{ } concat-as reverse
148 [ >hex ] { } map-as "." join ipv6-arpa-suffix append ;
150 : trim-ipv4-arpa ( string -- string' )
151 dotted> ipv4-arpa-suffix ?tail drop ;
153 : trim-ipv6-arpa ( string -- string' )
154 dotted> ipv6-arpa-suffix ?tail drop ;
156 : arpa>ipv4 ( string -- ip ) trim-ipv4-arpa reverse-ipv4 ;
158 : arpa>ipv6 ( string -- ip )
159 trim-ipv6-arpa "." split 2 group reverse
161 first2 swap [ hex> ] bi@ [ 4 shift ] [ ] bi* bitor
162 ] B{ } map-as byte-array>ipv6 ;
164 : parse-length-bytes ( -- sequence ) read1 read utf8 decode ;
166 : (parse-name) ( -- )
171 2 read be> HEX: 3fff bitand
172 seek-absolute [ parse-length-bytes , (parse-name) ] with-input-seek
174 parse-length-bytes , (parse-name)
178 : parse-name ( -- sequence )
179 [ (parse-name) ] { } make "." join ;
181 : parse-query ( -- query )
183 2 read be> <dns-type>
184 2 read be> <dns-class> <query> ;
186 : parse-soa ( -- soa )
194 4 read be> >>minimum ;
198 2 read be> >>preference
199 parse-name >>exchange ;
201 GENERIC: parse-rdata ( n type -- obj )
203 M: object parse-rdata drop read ;
204 M: A parse-rdata 2drop 4 read byte-array>ipv4 <a> ;
205 M: AAAA parse-rdata 2drop 16 read byte-array>ipv6 <aaaa> ;
206 M: CNAME parse-rdata 2drop parse-name <cname> ;
207 M: MX parse-rdata 2drop parse-mx ;
208 M: NS parse-rdata 2drop parse-name <ns> ;
209 M: PTR parse-rdata 2drop parse-name <ptr> ;
210 M: SOA parse-rdata 2drop parse-soa ;
215 2 read be> <dns-type> >>type
216 2 read be> <dns-class> >>class
218 2 read be> over type>> parse-rdata >>rdata ;
220 : parse-message ( byte-array -- message )
224 2 read be> header>message-parts set-slots[ qr opcode aa tc rd ra z rcode ]
226 2 read be> >>answer-section
227 2 read be> >>authority-section
228 2 read be> >>additional-section
229 [ [ parse-query ] replicate ] change-query
230 [ [ parse-rr ] replicate ] change-answer-section
231 [ [ parse-rr ] replicate ] change-authority-section
232 [ [ parse-rr ] replicate ] change-additional-section
235 : >n/label ( string -- byte-array )
236 [ length 1array ] [ utf8 encode ] bi B{ } append-as ;
238 : >name ( domain -- byte-array ) "." split [ >n/label ] map concat ;
240 : query>byte-array ( query -- byte-array )
244 [ type>> enum>number 2 >be ]
245 [ class>> enum>number 2 >be ]
247 ] B{ } append-outputs-as ;
249 GENERIC: rdata>byte-array ( rdata type -- obj )
251 M: A rdata>byte-array drop ipv4>byte-array ;
253 M: CNAME rdata>byte-array drop >name ;
255 M: HINFO rdata>byte-array
258 [ os>> >name ] bi append ;
260 M: MX rdata>byte-array
262 [ preference>> 2 >be ]
263 [ exchange>> >name ] bi append ;
265 M: NS rdata>byte-array drop >name ;
267 M: PTR rdata>byte-array drop >name ;
269 M: SOA rdata>byte-array
281 ] B{ } append-outputs-as ;
283 : rr>byte-array ( rr -- byte-array )
287 [ type>> enum>number 2 >be ]
288 [ class>> enum>number 2 >be ]
291 [ rdata>> ] [ type>> ] bi rdata>byte-array
292 [ length 2 >be ] [ ] bi append
295 ] B{ } append-outputs-as ;
297 : message>byte-array ( message -- byte-array )
301 [ message>header 2 >be ]
302 [ query>> length 2 >be ]
303 [ answer-section>> length 2 >be ]
304 [ authority-section>> length 2 >be ]
305 [ additional-section>> length 2 >be ]
306 [ query>> [ query>byte-array ] map concat ]
307 [ answer-section>> [ rr>byte-array ] map concat ]
308 [ authority-section>> [ rr>byte-array ] map concat ]
309 [ additional-section>> [ rr>byte-array ] map concat ]
311 ] B{ } append-outputs-as ;
313 : udp-query ( bytes server -- bytes' )
314 f 0 <inet4> <datagram>
315 30 seconds over set-timeout [
316 [ send ] [ receive drop ] bi
319 : <dns-inet4> ( -- inet4 )
320 dns-servers get random 53 <inet4> ;
322 : dns-query ( query -- message )
323 <message> message>byte-array
324 <dns-inet4> udp-query parse-message ;
326 : dns-A-query ( domain -- message ) A IN <query> dns-query ;
327 : dns-AAAA-query ( domain -- message ) AAAA IN <query> dns-query ;
328 : dns-MX-query ( domain -- message ) MX IN <query> dns-query ;
329 : dns-NS-query ( domain -- message ) NS IN <query> dns-query ;
331 : reverse-lookup ( reversed-ip -- message )
332 PTR IN <query> dns-query ;
334 : reverse-ipv4-lookup ( ip -- message )
335 ipv4>arpa reverse-lookup ;
337 : reverse-ipv6-lookup ( ip -- message )
338 ipv6>arpa reverse-lookup ;
340 : message>names ( message -- names )
341 answer-section>> [ rdata>> name>> ] map ;
343 : message>a-names ( message -- names )
345 [ rdata>> ] map [ a? ] filter [ name>> ] map ;
347 : message>mxs ( message -- assoc )
348 answer-section>> [ rdata>> [ preference>> ] [ exchange>> ] bi 2array ] map ;
350 : messages>names ( messages -- names )
351 [ message>names ] map concat ;
353 : forward-confirmed-reverse-dns-ipv4? ( ipv4-string -- ? )
354 dup reverse-ipv4-lookup message>names
355 [ dns-A-query ] map messages>names member? ;
357 : forward-confirmed-reverse-dns-ipv6? ( ipv6-string -- ? )
359 dup reverse-ipv6-lookup message>names
360 [ dns-AAAA-query ] map messages>names member? ;
362 : message>query-name ( message -- string )
363 query>> first name>> dotted> ;
367 M: string resolve-host
368 dup >lower "localhost" = [
369 drop resolve-localhost
371 dns-A-query message>a-names [ <ipv4> ] map
375 HOOK: initial-dns-servers os ( -- sequence )
378 { [ os windows? ] [ "dns.windows" ] }
379 { [ os unix? ] [ "dns.unix" ] }
382 dns-servers [ initial-dns-servers >vector ] initialize