1 ! Copyright (C) 2010 Doug Coleman.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors alien.enums alien.syntax arrays assocs
4 byte-arrays calendar combinators combinators.smart constructors
5 destructors fry grouping io io.binary io.buffers
6 io.encodings.binary io.encodings.string io.encodings.utf8
7 io.files io.ports io.sockets io.sockets.private
8 io.streams.byte-array io.timeouts kernel make math math.bitwise
9 math.parser math.ranges math.statistics memoize namespaces
10 nested-comments random sequences slots.syntax splitting strings
11 system unicode.categories vectors vocabs.loader unicode.case ;
14 : with-temporary-input-seek ( n seek-type quot -- )
16 [ seek-input ] dip call
17 ] dip seek-absolute seek-input ; inline
20 { A 1 } { NS 2 } { MD 3 } { MF 4 }
21 { CNAME 5 } { SOA 6 } { MB 7 } { MG 8 }
22 { MR 9 } { NULL 10 } { WKS 11 } { PTR 12 }
23 { HINFO 13 } { MINFO 14 } { MX 15 } { TXT 16 }
24 { RP 17 } { AFSDB 18 } { SIG 24 } { KEY 25 }
25 { AAAA 28 } { LOC 29 } { SVR 33 } { NAPTR 35 }
26 { KX 36 } { CERT 37 } { DNAME 39 } { OPT 41 }
27 { APL 42 } { DS 43 } { SSHFP 44 } { IPSECKEY 45 }
28 { RRSIG 46 } { NSEC 47 } { DNSKEY 48 } { DHCID 49 }
29 { NSEC3 50 } { NSEC3PARAM 51 } { HIP 55 } { SPF 99 }
30 { TKEY 249 } { TSIG 250 } { IXFR 251 }
31 { TA 32768 } { DLV 32769 } ;
33 ENUM: dns-class { IN 1 } { CS 2 } { CH 3 } { HS 4 } ;
35 ENUM: dns-opcode QUERY IQUERY STATUS ;
37 ENUM: dns-rcode NO-ERROR FORMAT-ERROR SERVER-FAILURE
38 NAME-ERROR NOT-IMPLEMENTED REFUSED ;
42 : add-dns-server ( string -- )
43 dns-servers get push ;
45 : remove-dns-server ( string -- )
46 dns-servers get remove! drop ;
48 : clear-dns-servers ( -- )
49 V{ } clone dns-servers set-global ;
51 : >dotted ( domain -- domain' )
52 dup "." tail? [ "." append ] unless ;
54 : dotted> ( string -- string' )
57 TUPLE: query name type class ;
58 CONSTRUCTOR: query ( name type class -- obj )
59 [ >dotted ] change-name ;
61 TUPLE: rr name type class ttl rdata ;
65 TUPLE: mx preference exchange ;
67 TUPLE: soa mname rname serial refresh retry expire minimum ;
70 CONSTRUCTOR: a ( name -- obj ) ;
73 CONSTRUCTOR: aaaa ( name -- obj ) ;
76 CONSTRUCTOR: cname ( name -- obj ) ;
79 CONSTRUCTOR: ptr ( name -- obj ) ;
82 CONSTRUCTOR: 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 ( 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 BIN: 1 bitand ]
119 [ -11 shift BIN: 111 bitand <dns-opcode> ]
120 [ -10 shift BIN: 1 bitand ]
121 [ -9 shift BIN: 1 bitand ]
122 [ -8 shift BIN: 1 bitand ]
123 [ -7 shift BIN: 1 bitand ]
124 [ -4 shift BIN: 111 bitand ]
125 [ BIN: 1111 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 )
153 ipv6>byte-array [ [ -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 ( -- seq ) read1 read utf8 decode ;
173 : (parse-name) ( -- )
178 2 read be> HEX: 3fff bitand
179 seek-absolute [ parse-length-bytes , (parse-name) ] with-temporary-input-seek
181 parse-length-bytes , (parse-name)
185 : parse-name ( -- seq )
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 ( ba -- 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 : >n/label ( string -- ba )
243 [ length 1array ] [ utf8 encode ] bi B{ } append-as ;
245 : >name ( dn -- ba ) "." split [ >n/label ] map concat ;
247 : query>byte-array ( query -- ba )
251 [ type>> enum>number 2 >be ]
252 [ class>> enum>number 2 >be ]
254 ] B{ } append-outputs-as ;
256 GENERIC: rdata>byte-array ( rdata type -- obj )
258 M: A rdata>byte-array drop ipv4>byte-array ;
260 M: CNAME rdata>byte-array drop >name ;
262 M: HINFO rdata>byte-array
265 [ os>> >name ] bi append ;
267 M: MX rdata>byte-array
269 [ preference>> 2 >be ]
270 [ exchange>> >name ] bi append ;
272 M: NS rdata>byte-array drop >name ;
274 M: PTR rdata>byte-array drop >name ;
276 M: SOA rdata>byte-array
288 ] B{ } append-outputs-as ;
290 : rr>byte-array ( rr -- ba )
294 [ type>> enum>number 2 >be ]
295 [ class>> enum>number 2 >be ]
298 [ rdata>> ] [ type>> ] bi rdata>byte-array
299 [ length 2 >be ] [ ] bi append
302 ] B{ } append-outputs-as ;
304 : message>byte-array ( message -- ba )
308 [ message>header 2 >be ]
309 [ query>> length 2 >be ]
310 [ answer-section>> length 2 >be ]
311 [ authority-section>> length 2 >be ]
312 [ additional-section>> length 2 >be ]
313 [ query>> [ query>byte-array ] map concat ]
314 [ answer-section>> [ rr>byte-array ] map concat ]
315 [ authority-section>> [ rr>byte-array ] map concat ]
316 [ additional-section>> [ rr>byte-array ] map concat ]
318 ] B{ } append-outputs-as ;
320 : udp-query ( bytes server -- bytes' )
321 f 0 <inet4> <datagram>
322 30 seconds over set-timeout [
323 [ send ] [ receive drop ] bi
326 : <dns-inet4> ( -- inet4 )
327 dns-servers get random 53 <inet4> ;
329 : dns-query ( query -- message )
330 <message> message>byte-array
331 <dns-inet4> udp-query parse-message ;
333 : dns-A-query ( domain -- message ) A IN <query> dns-query ;
334 : dns-AAAA-query ( domain -- message ) AAAA IN <query> dns-query ;
335 : dns-MX-query ( domain -- message ) MX IN <query> dns-query ;
336 : dns-NS-query ( domain -- message ) NS IN <query> dns-query ;
338 : reverse-lookup ( reversed-ip -- message )
339 PTR IN <query> dns-query ;
341 : reverse-ipv4-lookup ( ip -- message )
342 ipv4>arpa reverse-lookup ;
344 : reverse-ipv6-lookup ( ip -- message )
345 ipv6>arpa reverse-lookup ;
347 : message>names ( message -- names )
348 answer-section>> [ rdata>> name>> ] map ;
350 : message>a-names ( message -- names )
352 [ rdata>> ] map [ a? ] filter [ name>> ] map ;
354 : message>mxs ( message -- assoc )
355 answer-section>> [ rdata>> [ preference>> ] [ exchange>> ] bi 2array ] map ;
357 : messages>names ( messages -- names )
358 [ message>names ] map concat ;
360 : forward-confirmed-reverse-dns-ipv4? ( ipv4-string -- ? )
361 dup reverse-ipv4-lookup message>names
362 [ dns-A-query ] map messages>names member? ;
364 : forward-confirmed-reverse-dns-ipv6? ( ipv6-string -- ? )
366 dup reverse-ipv6-lookup message>names
367 [ dns-AAAA-query ] map messages>names member? ;
369 : message>query-name ( message -- string )
370 query>> first name>> dotted> ;
374 M: string resolve-host
375 dup >lower "localhost" = [
376 drop resolve-localhost
378 dns-A-query message>a-names [ <ipv4> ] map
382 HOOK: initial-dns-servers os ( -- seq )
385 { [ os windows? ] [ "dns.windows" ] }
386 { [ os unix? ] [ "dns.unix" ] }
389 dns-servers [ initial-dns-servers >vector ] initialize