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 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 } { SVR 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 ;
68 CONSTRUCTOR: <a> a ( name -- obj ) ;
71 CONSTRUCTOR: <aaaa> aaaa ( name -- obj ) ;
74 CONSTRUCTOR: <cname> cname ( name -- obj ) ;
77 CONSTRUCTOR: <ptr> ptr ( name -- obj ) ;
80 CONSTRUCTOR: <ns> ns ( name -- obj ) ;
82 TUPLE: message id qr opcode aa tc rd ra z rcode
83 query answer-section authority-section additional-section ;
85 CONSTRUCTOR: <message> message ( query -- obj )
95 [ dup sequence? [ 1array ] unless ] change-query
97 { } >>authority-section
98 { } >>additional-section ;
100 : message>header ( message -- n )
104 [ opcode>> enum>number 11 shift ]
110 [ rcode>> enum>number 0 shift ]
114 : header>message-parts ( n -- qr opcode aa tc rd ra z rcode )
116 [ -15 shift 0b1 bitand ]
117 [ -11 shift 0b111 bitand <dns-opcode> ]
118 [ -10 shift 0b1 bitand ]
119 [ -9 shift 0b1 bitand ]
120 [ -8 shift 0b1 bitand ]
121 [ -7 shift 0b1 bitand ]
122 [ -4 shift 0b111 bitand ]
123 [ 0b1111 bitand <dns-rcode> ]
126 : byte-array>ipv4 ( byte-array -- string )
127 [ number>string ] { } map-as "." join ;
129 : byte-array>ipv6 ( byte-array -- string )
130 2 group [ be> >hex ] { } map-as ":" join ;
132 : ipv4>byte-array ( string -- byte-array )
133 "." split [ string>number ] B{ } map-as ;
135 : ipv6>byte-array ( string -- byte-array )
136 T{ inet6 } inet-pton ;
138 : expand-ipv6 ( ipv6 -- ipv6' ) ipv6>byte-array byte-array>ipv6 ;
140 : reverse-ipv4 ( string -- string )
141 ipv4>byte-array reverse byte-array>ipv4 ;
143 CONSTANT: ipv4-arpa-suffix ".in-addr.arpa"
145 : ipv4>arpa ( string -- string )
146 reverse-ipv4 ipv4-arpa-suffix append ;
148 CONSTANT: ipv6-arpa-suffix ".ip6.arpa"
150 : ipv6>arpa ( string -- string )
152 [ [ -4 shift 4 bits ] [ 4 bits ] bi 2array ] { } map-as
153 B{ } concat-as reverse
154 [ >hex ] { } map-as "." join ipv6-arpa-suffix append ;
156 : trim-ipv4-arpa ( string -- string' )
157 dotted> ipv4-arpa-suffix ?tail drop ;
159 : trim-ipv6-arpa ( string -- string' )
160 dotted> ipv6-arpa-suffix ?tail drop ;
162 : arpa>ipv4 ( string -- ip ) trim-ipv4-arpa reverse-ipv4 ;
164 : arpa>ipv6 ( string -- ip )
165 trim-ipv6-arpa "." split 2 group reverse
167 first2 swap [ hex> ] bi@ [ 4 shift ] [ ] bi* bitor
168 ] B{ } map-as byte-array>ipv6 ;
170 : parse-length-bytes ( byte -- sequence ) read utf8 decode ;
172 : (parse-name) ( -- )
175 8 shift read1 bitor 0x3fff bitand
177 read1 parse-length-bytes , (parse-name)
180 parse-length-bytes , (parse-name)
184 : parse-name ( -- sequence )
185 [ (parse-name) ] { } make "." join ;
187 : parse-query ( -- query )
189 2 read be> <dns-type>
190 2 read be> <dns-class> <query> ;
192 : parse-soa ( -- soa )
200 4 read be> >>minimum ;
204 2 read be> >>preference
205 parse-name >>exchange ;
207 GENERIC: parse-rdata ( n type -- obj )
209 M: object parse-rdata drop read ;
210 M: A parse-rdata 2drop 4 read byte-array>ipv4 <a> ;
211 M: AAAA parse-rdata 2drop 16 read byte-array>ipv6 <aaaa> ;
212 M: CNAME parse-rdata 2drop parse-name <cname> ;
213 M: MX parse-rdata 2drop parse-mx ;
214 M: NS parse-rdata 2drop parse-name <ns> ;
215 M: PTR parse-rdata 2drop parse-name <ptr> ;
216 M: SOA parse-rdata 2drop parse-soa ;
221 2 read be> <dns-type> >>type
222 2 read be> <dns-class> >>class
224 2 read be> over type>> parse-rdata >>rdata ;
226 : parse-message ( byte-array -- message )
230 2 read be> header>message-parts set-slots[ qr opcode aa tc rd ra z rcode ]
232 2 read be> >>answer-section
233 2 read be> >>authority-section
234 2 read be> >>additional-section
235 [ [ parse-query ] replicate ] change-query
236 [ [ parse-rr ] replicate ] change-answer-section
237 [ [ parse-rr ] replicate ] change-authority-section
238 [ [ parse-rr ] replicate ] change-additional-section
241 ERROR: unsupported-domain-name string ;
243 : >n/label ( string -- byte-array )
245 [ unsupported-domain-name ] unless
246 [ length 1array ] [ ] bi B{ } append-as ;
248 : >name ( domain -- byte-array )
249 "." split [ >n/label ] map concat ;
251 : query>byte-array ( query -- byte-array )
255 [ type>> enum>number 2 >be ]
256 [ class>> enum>number 2 >be ]
258 ] B{ } append-outputs-as ;
260 GENERIC: rdata>byte-array ( rdata type -- obj )
262 M: A rdata>byte-array drop ipv4>byte-array ;
264 M: CNAME rdata>byte-array drop >name ;
266 M: HINFO rdata>byte-array
269 [ os>> >name ] bi append ;
271 M: MX rdata>byte-array
273 [ preference>> 2 >be ]
274 [ exchange>> >name ] bi append ;
276 M: NS rdata>byte-array drop >name ;
278 M: PTR rdata>byte-array drop >name ;
280 M: SOA rdata>byte-array
292 ] B{ } append-outputs-as ;
294 M: TXT rdata>byte-array
297 : rr>byte-array ( rr -- byte-array )
301 [ type>> enum>number 2 >be ]
302 [ class>> enum>number 2 >be ]
305 [ rdata>> ] [ type>> ] bi rdata>byte-array
306 [ length 2 >be ] [ ] bi append
309 ] B{ } append-outputs-as ;
311 : message>byte-array ( message -- byte-array )
315 [ message>header 2 >be ]
316 [ query>> length 2 >be ]
317 [ answer-section>> length 2 >be ]
318 [ authority-section>> length 2 >be ]
319 [ additional-section>> length 2 >be ]
320 [ query>> [ query>byte-array ] map concat ]
321 [ answer-section>> [ rr>byte-array ] map concat ]
322 [ authority-section>> [ rr>byte-array ] map concat ]
323 [ additional-section>> [ rr>byte-array ] map concat ]
325 ] B{ } append-outputs-as ;
327 : udp-query ( bytes server -- bytes' )
328 f 0 <inet4> <datagram>
329 10 seconds over set-timeout [
330 [ send ] [ receive drop ] bi
333 : <dns-inet4> ( -- inet4 )
334 dns-servers get random 53 <inet4> ;
336 : dns-query ( name type class -- message )
337 <query> <message> message>byte-array
338 <dns-inet4> udp-query parse-message ;
340 : dns-A-query ( name -- message ) A IN dns-query ;
341 : dns-AAAA-query ( name -- message ) AAAA IN dns-query ;
342 : dns-MX-query ( name -- message ) MX IN dns-query ;
343 : dns-NS-query ( name -- message ) NS IN dns-query ;
344 : dns-TXT-query ( name -- message ) TXT IN dns-query ;
346 : read-TXT-strings ( byte-array -- strings )
348 binary <byte-reader> [
349 [ read1 [ read , t ] [ f ] if* ] loop
353 : TXT-message>strings ( message -- strings )
356 read-TXT-strings [ utf8 decode ] map
360 dns-TXT-query TXT-message>strings [ [ write ] each nl ] each ;
362 : reverse-lookup ( reversed-ip -- message )
365 : reverse-ipv4-lookup ( ip -- message )
366 ipv4>arpa reverse-lookup ;
368 : reverse-ipv6-lookup ( ip -- message )
369 ipv6>arpa reverse-lookup ;
371 : message>names ( message -- names )
372 answer-section>> [ rdata>> name>> ] map ;
374 : filter-message-rdata>names ( message quot -- names )
375 [ answer-section>> [ rdata>> ] map ] dip filter [ name>> ] map ; inline
377 : message>a-names ( message -- names )
378 [ a? ] filter-message-rdata>names ;
380 : message>aaaa-names ( message -- names )
381 [ aaaa? ] filter-message-rdata>names ;
383 : message>mxs ( message -- assoc )
384 answer-section>> [ rdata>> [ preference>> ] [ exchange>> ] bi 2array ] map ;
386 : messages>names ( messages -- names )
387 [ message>names ] map concat ;
389 : forward-confirmed-reverse-dns-ipv4? ( ipv4-string -- ? )
390 dup reverse-ipv4-lookup message>names
391 [ dns-A-query ] map messages>names member? ;
393 : forward-confirmed-reverse-dns-ipv6? ( ipv6-string -- ? )
395 dup reverse-ipv6-lookup message>names
396 [ dns-AAAA-query ] map messages>names member? ;
398 : message>query-name ( message -- string )
399 query>> first name>> dotted> ;
401 ! XXX: Turn on someday for nonblocking DNS lookups
402 ! M: string resolve-host
403 ! dup >lower "localhost" = [
404 ! drop resolve-localhost
406 ! dns-A-query message>a-names [ <ipv4> ] map
409 HOOK: initial-dns-servers os ( -- sequence )
412 { [ os windows? ] [ "dns.windows" ] }
413 { [ os unix? ] [ "dns.unix" ] }
416 : with-dns-servers ( servers quot -- )
417 [ dns-servers ] dip with-variable ; inline
419 dns-servers [ initial-dns-servers >vector ] initialize