Commit | Line | Data |
---|---|---|
e576be50 | 1 | /* |
2 | * types.c | |
3 | * - RR-type-specific code, and the machinery to call it | |
4 | */ | |
5 | /* | |
ae8cc977 | 6 | * This file is part of adns, which is |
7 | * Copyright (C) 1997-2000,2003,2006 Ian Jackson | |
8 | * Copyright (C) 1999-2000,2003,2006 Tony Finch | |
9 | * Copyright (C) 1991 Massachusetts Institute of Technology | |
10 | * (See the file INSTALL for full details.) | |
e576be50 | 11 | * |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software Foundation, | |
24 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
25 | */ | |
98a3f706 | 26 | |
8a8511e2 | 27 | #include <stddef.h> |
1b644113 | 28 | #include <stdlib.h> |
29 | ||
0f091044 | 30 | #include <sys/types.h> |
71a6ff46 | 31 | #include <sys/socket.h> |
32 | #include <netinet/in.h> | |
86e7b8d9 | 33 | #include <arpa/inet.h> |
34 | ||
98a3f706 | 35 | #include "internal.h" |
36 | ||
609133ee | 37 | #define R_NOMEM return adns_s_nomemory |
38 | #define CSP_ADDSTR(s) do { \ | |
39 | if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; \ | |
40 | } while (0) | |
1dfe95d8 | 41 | |
eb81d633 | 42 | /* |
43 | * order of sections: | |
44 | * | |
9ec44266 | 45 | * _string (pap) |
eb81d633 | 46 | * _textdata, _qstring (csp) |
47 | * _str (mf,cs) | |
9ec44266 | 48 | * _intstr (mf,csp,cs) |
eb81d633 | 49 | * _manyistr (mf,cs) |
50 | * _txt (pa) | |
c91e3ed3 MW |
51 | * _inaddr (pa,di,cs |
52 | * +search_sortlist, dip_genaddr, csp_genaddr) | |
eeee7503 | 53 | * _in6addr (pa,di,cs) |
8a8511e2 | 54 | * _addr (pap,pa,di,div,csp,cs,gsz,qs |
b5e689a3 MW |
55 | * +search_sortlist_sa, dip_sockaddr, |
56 | * addr_rrtypes, addr_submit, icb_addr) | |
382b81f7 MW |
57 | * _domain (pap,csp,cs) |
58 | * _dom_raw (pa) | |
eb81d633 | 59 | * _host_raw (pa) |
382b81f7 MW |
60 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs |
61 | * +pap_findaddrs, icb_hostaddr) | |
eb81d633 | 62 | * _mx_raw (pa,di) |
63 | * _mx (pa,di) | |
64 | * _inthostaddr (mf,cs) | |
382b81f7 | 65 | * _inthost (cs) |
938b0228 | 66 | * _ptr (ckl,pa +icb_ptr) |
382b81f7 MW |
67 | * _strpair (mf) |
68 | * _intstrpair (mf) | |
9ec44266 | 69 | * _hinfo (pa) |
382b81f7 MW |
70 | * _mailbox (pap,csp +pap_mailbox822) |
71 | * _rp (pa,cs) | |
9ec44266 | 72 | * _soa (pa,mf,cs) |
e8e5aeac | 73 | * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort) |
2c6eb096 | 74 | * _byteblock (mf) |
75 | * _opaque (pa,cs) | |
eb81d633 | 76 | * _flat (mf) |
77 | * | |
78 | * within each section: | |
e8e5aeac | 79 | * ckl_* |
eb81d633 | 80 | * pap_* |
81 | * pa_* | |
82 | * dip_* | |
83 | * di_* | |
84 | * mfp_* | |
85 | * mf_* | |
86 | * csp_* | |
87 | * cs_* | |
b0a32b17 | 88 | * gsz_* |
d24e2a7e | 89 | * postsort_* |
a586770a | 90 | * qs_* |
eb81d633 | 91 | */ |
92 | ||
93 | /* | |
b365d68a | 94 | * _qstring (pap,csp) |
eb81d633 | 95 | */ |
96 | ||
b365d68a | 97 | static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max, |
9ec44266 | 98 | int *len_r, char **str_r) { |
99 | /* Neither len_r nor str_r may be null. | |
100 | * End of datagram (overrun) is indicated by returning adns_s_invaliddata; | |
101 | */ | |
102 | const byte *dgram= pai->dgram; | |
103 | int l, cbyte; | |
104 | char *str; | |
105 | ||
106 | cbyte= *cbyte_io; | |
107 | ||
108 | if (cbyte >= max) return adns_s_invaliddata; | |
109 | GET_B(cbyte,l); | |
110 | if (cbyte+l > max) return adns_s_invaliddata; | |
111 | ||
112 | str= adns__alloc_interim(pai->qu, l+1); | |
113 | if (!str) R_NOMEM; | |
114 | ||
115 | str[l]= 0; | |
116 | memcpy(str,dgram+cbyte,l); | |
117 | ||
118 | *len_r= l; | |
119 | *str_r= str; | |
120 | *cbyte_io= cbyte+l; | |
121 | ||
122 | return adns_s_ok; | |
123 | } | |
124 | ||
b365d68a | 125 | static adns_status csp_qstring(vbuf *vb, const char *dp, int len) { |
eb81d633 | 126 | unsigned char ch; |
127 | char buf[10]; | |
128 | int cn; | |
129 | ||
130 | CSP_ADDSTR("\""); | |
131 | for (cn=0; cn<len; cn++) { | |
132 | ch= *dp++; | |
b365d68a | 133 | if (ch == '\\') { |
9ec44266 | 134 | CSP_ADDSTR("\\\\"); |
b365d68a | 135 | } else if (ch == '"') { |
136 | CSP_ADDSTR("\\\""); | |
137 | } else if (ch >= 32 && ch <= 126) { | |
138 | if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM; | |
eb81d633 | 139 | } else { |
9ec44266 | 140 | sprintf(buf,"\\x%02x",ch); |
eb81d633 | 141 | CSP_ADDSTR(buf); |
142 | } | |
143 | } | |
144 | CSP_ADDSTR("\""); | |
145 | ||
146 | return adns_s_ok; | |
147 | } | |
148 | ||
eb81d633 | 149 | /* |
b365d68a | 150 | * _str (mf) |
eb81d633 | 151 | */ |
152 | ||
153 | static void mf_str(adns_query qu, void *datap) { | |
154 | char **rrp= datap; | |
155 | ||
156 | adns__makefinal_str(qu,rrp); | |
157 | } | |
158 | ||
eb81d633 | 159 | /* |
b365d68a | 160 | * _intstr (mf) |
eb81d633 | 161 | */ |
162 | ||
163 | static void mf_intstr(adns_query qu, void *datap) { | |
164 | adns_rr_intstr *rrp= datap; | |
165 | ||
166 | adns__makefinal_str(qu,&rrp->str); | |
167 | } | |
168 | ||
eb81d633 | 169 | /* |
b365d68a | 170 | * _manyistr (mf) |
eb81d633 | 171 | */ |
172 | ||
173 | static void mf_manyistr(adns_query qu, void *datap) { | |
174 | adns_rr_intstr **rrp= datap; | |
175 | adns_rr_intstr *te, *table; | |
176 | void *tablev; | |
177 | int tc; | |
178 | ||
179 | for (tc=0, te= *rrp; te->i >= 0; te++, tc++); | |
180 | tablev= *rrp; | |
181 | adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1)); | |
182 | *rrp= table= tablev; | |
183 | for (te= *rrp; te->i >= 0; te++) | |
184 | adns__makefinal_str(qu,&te->str); | |
185 | } | |
186 | ||
eb81d633 | 187 | /* |
b365d68a | 188 | * _txt (pa,cs) |
eb81d633 | 189 | */ |
190 | ||
609133ee | 191 | static adns_status pa_txt(const parseinfo *pai, int cbyte, |
192 | int max, void *datap) { | |
eb81d633 | 193 | adns_rr_intstr **rrp= datap, *table, *te; |
194 | const byte *dgram= pai->dgram; | |
195 | int ti, tc, l, startbyte; | |
9ec44266 | 196 | adns_status st; |
eb81d633 | 197 | |
198 | startbyte= cbyte; | |
199 | if (cbyte >= max) return adns_s_invaliddata; | |
200 | tc= 0; | |
201 | while (cbyte < max) { | |
202 | GET_B(cbyte,l); | |
203 | cbyte+= l; | |
9ec44266 | 204 | tc++; |
eb81d633 | 205 | } |
b365d68a | 206 | if (cbyte != max || !tc) return adns_s_invaliddata; |
eb81d633 | 207 | |
208 | table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1)); | |
209 | if (!table) R_NOMEM; | |
210 | ||
211 | for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) { | |
b365d68a | 212 | st= pap_qstring(pai, &cbyte, max, &te->i, &te->str); |
9ec44266 | 213 | if (st) return st; |
eb81d633 | 214 | } |
215 | assert(cbyte == max); | |
216 | ||
217 | te->i= -1; | |
218 | te->str= 0; | |
219 | ||
220 | *rrp= table; | |
221 | return adns_s_ok; | |
828d89bd | 222 | } |
223 | ||
b365d68a | 224 | static adns_status cs_txt(vbuf *vb, const void *datap) { |
225 | const adns_rr_intstr *const *rrp= datap; | |
226 | const adns_rr_intstr *current; | |
227 | adns_status st; | |
228 | int spc; | |
229 | ||
230 | for (current= *rrp, spc=0; current->i >= 0; current++, spc=1) { | |
231 | if (spc) CSP_ADDSTR(" "); | |
232 | st= csp_qstring(vb,current->str,current->i); if (st) return st; | |
233 | } | |
234 | return adns_s_ok; | |
235 | } | |
236 | ||
237 | /* | |
238 | * _hinfo (cs) | |
239 | */ | |
240 | ||
241 | static adns_status cs_hinfo(vbuf *vb, const void *datap) { | |
242 | const adns_rr_intstrpair *rrp= datap; | |
243 | adns_status st; | |
244 | ||
245 | st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i); if (st) return st; | |
246 | CSP_ADDSTR(" "); | |
247 | st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i); if (st) return st; | |
248 | return adns_s_ok; | |
249 | } | |
250 | ||
eb81d633 | 251 | /* |
c91e3ed3 | 252 | * _inaddr (pa,di,cs +search_sortlist, dip_genaddr, csp_genaddr) |
eb81d633 | 253 | */ |
254 | ||
609133ee | 255 | static adns_status pa_inaddr(const parseinfo *pai, int cbyte, |
256 | int max, void *datap) { | |
e062dcae | 257 | struct in_addr *storeto= datap; |
e7a9ca47 | 258 | |
259 | if (max-cbyte != 4) return adns_s_invaliddata; | |
1dfe95d8 | 260 | memcpy(storeto, pai->dgram + cbyte, 4); |
e7a9ca47 | 261 | return adns_s_ok; |
262 | } | |
263 | ||
f930c455 | 264 | static int search_sortlist(adns_state ads, int af, const void *ad) { |
09957b1c | 265 | const struct sortlist *slp; |
421c1f2e | 266 | struct in_addr a4; |
09957b1c | 267 | int i; |
c4e5d3cc MW |
268 | int v6mappedp= 0; |
269 | ||
270 | if (af == AF_INET6) { | |
421c1f2e | 271 | const struct in6_addr *a6= ad; |
c4e5d3cc | 272 | if (IN6_IS_ADDR_V4MAPPED(a6)) { |
421c1f2e IJ |
273 | a4.s_addr= htonl(((unsigned long)a6->s6_addr[12] << 24) | |
274 | ((unsigned long)a6->s6_addr[13] << 16) | | |
275 | ((unsigned long)a6->s6_addr[14] << 8) | | |
276 | ((unsigned long)a6->s6_addr[15] << 0)); | |
c4e5d3cc MW |
277 | v6mappedp= 1; |
278 | } | |
279 | } | |
280 | ||
09957b1c | 281 | for (i=0, slp=ads->sortlist; |
609133ee | 282 | i<ads->nsortlist && |
421c1f2e | 283 | !adns__addr_matches(af,ad, &slp->base,&slp->mask) && |
c4e5d3cc | 284 | !(v6mappedp && |
421c1f2e | 285 | adns__addr_matches(AF_INET,&a4, &slp->base,&slp->mask)); |
09957b1c | 286 | i++, slp++); |
287 | return i; | |
eb81d633 | 288 | } |
289 | ||
f930c455 | 290 | static int dip_genaddr(adns_state ads, int af, const void *a, const void *b) { |
09957b1c | 291 | int ai, bi; |
292 | ||
293 | if (!ads->nsortlist) return 0; | |
294 | ||
f930c455 MW |
295 | ai= search_sortlist(ads,af,a); |
296 | bi= search_sortlist(ads,af,b); | |
09957b1c | 297 | return bi<ai; |
298 | } | |
299 | ||
609133ee | 300 | static int di_inaddr(adns_state ads, |
301 | const void *datap_a, const void *datap_b) { | |
f930c455 | 302 | return dip_genaddr(ads,AF_INET,datap_a,datap_b); |
e062dcae | 303 | } |
304 | ||
c91e3ed3 MW |
305 | static adns_status csp_genaddr(vbuf *vb, int af, const void *p) { |
306 | char buf[ADNS_ADDR2TEXT_BUFLEN]; | |
307 | int len= sizeof(buf); | |
308 | adns_rr_addr a; | |
309 | int err; | |
310 | ||
311 | memset(&a, 0, sizeof(a)); | |
312 | a.addr.sa.sa_family= af; | |
421c1f2e | 313 | adns__addr_inject(p, &a.addr); |
c91e3ed3 MW |
314 | err= adns_addr2text(&a.addr.sa,0, buf,&len, 0); assert(!err); |
315 | CSP_ADDSTR(buf); | |
1dfe95d8 | 316 | return adns_s_ok; |
86e7b8d9 | 317 | } |
e7a9ca47 | 318 | |
c91e3ed3 MW |
319 | static adns_status cs_inaddr(vbuf *vb, const void *datap) { |
320 | return csp_genaddr(vb, AF_INET,datap); | |
321 | } | |
322 | ||
eb81d633 | 323 | /* |
eeee7503 MW |
324 | * _in6addr (pa,di,cs) |
325 | */ | |
326 | ||
327 | static adns_status pa_in6addr(const parseinfo *pai, int cbyte, | |
328 | int max, void *datap) { | |
329 | struct in6_addr *storeto= datap; | |
330 | ||
331 | if (max-cbyte != 16) return adns_s_invaliddata; | |
332 | memcpy(storeto->s6_addr, pai->dgram + cbyte, 16); | |
333 | return adns_s_ok; | |
334 | } | |
335 | ||
336 | static int di_in6addr(adns_state ads, | |
337 | const void *datap_a, const void *datap_b) { | |
338 | return dip_genaddr(ads,AF_INET6,datap_a,datap_b); | |
339 | } | |
340 | ||
341 | static adns_status cs_in6addr(vbuf *vb, const void *datap) { | |
342 | return csp_genaddr(vb,AF_INET6,datap); | |
343 | } | |
344 | ||
345 | /* | |
8a8511e2 | 346 | * _addr (pap,pa,di,div,csp,cs,gsz,qs |
b5e689a3 MW |
347 | * +search_sortlist_sa, dip_sockaddr, addr_rrtypes, |
348 | * addr_submit, icb_addr) | |
eb81d633 | 349 | */ |
350 | ||
92c8ebba MW |
351 | static const typeinfo tinfo_addrsub; |
352 | ||
b5e689a3 | 353 | #define ADDR_RRTYPES(_) _(a) _(aaaa) |
92c8ebba MW |
354 | |
355 | static const adns_rrtype addr_all_rrtypes[] = { | |
356 | #define RRTY_CODE(ty) adns_r_##ty, | |
357 | ADDR_RRTYPES(RRTY_CODE) | |
358 | #undef RRTY_CODE | |
359 | }; | |
360 | ||
361 | enum { | |
362 | #define RRTY_INDEX(ty) addr__ri_##ty, | |
363 | ADDR_RRTYPES(RRTY_INDEX) | |
364 | #undef RRTY_INDEX | |
365 | addr_nrrtypes, | |
366 | #define RRTY_FLAG(ty) addr_rf_##ty = 1 << addr__ri_##ty, | |
367 | ADDR_RRTYPES(RRTY_FLAG) | |
a165255a | 368 | addr__rrty_eat_final_comma |
92c8ebba MW |
369 | #undef RRTY_FLAG |
370 | }; | |
371 | ||
372 | static unsigned addr_rrtypeflag(adns_rrtype type) { | |
373 | int i; | |
374 | ||
375 | type &= adns_rrt_typemask; | |
de3f4632 IJ |
376 | for (i=0; i<addr_nrrtypes; i++) |
377 | if (type==addr_all_rrtypes[i]) | |
378 | return 1 << i; | |
379 | return 0; | |
92c8ebba MW |
380 | } |
381 | ||
c4cb1794 MW |
382 | /* About CNAME handling in addr queries. |
383 | * | |
384 | * A user-level addr query is translated into a number of protocol-level | |
385 | * queries, and its job is to reassemble the results. This gets tricky if | |
386 | * the answers aren't consistent. In particular, if the answers report | |
387 | * inconsistent indirection via CNAME records (e.g., different CNAMEs, or | |
388 | * some indirect via a CNAME, and some don't) then we have trouble. | |
389 | * | |
390 | * Once we've received an answer, even if it was NODATA, we set | |
391 | * adns__qf_addr_answer on the parent query. This will let us detect a | |
392 | * conflict between a no-CNAME-with-NODATA reply and a subsequent CNAME. | |
393 | * | |
394 | * If we detect a conflict of any kind, then at least one answer came back | |
395 | * with a CNAME record, so we pick the first such answer (somewhat | |
396 | * arbitrarily) as being the `right' canonical name, and set this in the | |
397 | * parent query's answer->cname slot. We discard address records from the | |
398 | * wrong name. And finally we cancel the outstanding child queries, and | |
399 | * resubmit address queries for the address families we don't yet have, with | |
400 | * adns__qf_addr_cname set so that we know that we're in the fixup state. | |
401 | */ | |
402 | ||
8a8511e2 MW |
403 | static adns_status pap_addr(const parseinfo *pai, int rrty, size_t rrsz, |
404 | int *cbyte_io, int max, adns_rr_addr *storeto) { | |
1dfe95d8 | 405 | const byte *dgram= pai->dgram; |
8a8511e2 | 406 | int af, addrlen, salen; |
21249652 | 407 | struct in6_addr v6map; |
8a8511e2 MW |
408 | const void *oaddr= dgram + *cbyte_io; |
409 | int avail= max - *cbyte_io; | |
410 | int step= -1; | |
411 | void *addrp= 0; | |
412 | ||
413 | switch (rrty) { | |
414 | case adns_r_a: | |
21249652 MW |
415 | if ((pai->qu->flags & adns_qf_ipv6_mapv4) && |
416 | (pai->qu->answer->type & adns__qtf_bigaddr)) { | |
417 | if (avail < 4) return adns_s_invaliddata; | |
418 | memset(v6map.s6_addr + 0, 0x00, 10); | |
419 | memset(v6map.s6_addr + 10, 0xff, 2); | |
420 | memcpy(v6map.s6_addr + 12, oaddr, 4); | |
421 | oaddr= v6map.s6_addr; avail= sizeof(v6map.s6_addr); | |
422 | if (step < 0) step= 4; | |
423 | goto aaaa; | |
424 | } | |
8a8511e2 MW |
425 | af= AF_INET; addrlen= 4; |
426 | addrp= &storeto->addr.inet.sin_addr; | |
427 | salen= sizeof(storeto->addr.inet); | |
428 | break; | |
21249652 MW |
429 | case adns_r_aaaa: |
430 | aaaa: | |
431 | af= AF_INET6; addrlen= 16; | |
432 | addrp= storeto->addr.inet6.sin6_addr.s6_addr; | |
433 | salen= sizeof(storeto->addr.inet6); | |
434 | break; | |
8a8511e2 MW |
435 | } |
436 | assert(addrp); | |
c7836bc9 | 437 | |
8a8511e2 MW |
438 | assert(offsetof(adns_rr_addr, addr) + salen <= rrsz); |
439 | if (addrlen < avail) return adns_s_invaliddata; | |
440 | if (step < 0) step= addrlen; | |
441 | *cbyte_io += step; | |
442 | memset(&storeto->addr, 0, salen); | |
443 | storeto->len= salen; | |
444 | storeto->addr.sa.sa_family= af; | |
445 | memcpy(addrp, oaddr, addrlen); | |
446 | ||
447 | return adns_s_ok; | |
448 | } | |
449 | ||
450 | static adns_status pa_addr(const parseinfo *pai, int cbyte, | |
451 | int max, void *datap) { | |
452 | int err= pap_addr(pai, pai->qu->answer->type & adns_rrt_typemask, | |
453 | pai->qu->answer->rrsz, &cbyte, max, datap); | |
454 | if (err) return err; | |
455 | if (cbyte != max) return adns_s_invaliddata; | |
828d89bd | 456 | return adns_s_ok; |
457 | } | |
458 | ||
f930c455 | 459 | static int search_sortlist_sa(adns_state ads, const struct sockaddr *sa) { |
421c1f2e IJ |
460 | const void *pa = adns__sockaddr_addr(sa); |
461 | return search_sortlist(ads, sa->sa_family, pa); | |
f930c455 | 462 | } |
07554ccd | 463 | |
f930c455 MW |
464 | static int dip_sockaddr(adns_state ads, |
465 | const struct sockaddr *sa, | |
466 | const struct sockaddr *sb) { | |
467 | if (!ads->sortlist) return 0; | |
468 | return search_sortlist_sa(ads, sa) > search_sortlist_sa(ads, sb); | |
469 | } | |
470 | ||
09957b1c | 471 | static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) { |
551ff40f | 472 | const adns_rr_addr *ap= datap_a, *bp= datap_b; |
f930c455 | 473 | return dip_sockaddr(ads, &ap->addr.sa, &bp->addr.sa); |
828d89bd | 474 | } |
475 | ||
09957b1c | 476 | static int div_addr(void *context, const void *datap_a, const void *datap_b) { |
477 | const adns_state ads= context; | |
478 | ||
479 | return di_addr(ads, datap_a, datap_b); | |
480 | } | |
481 | ||
551ff40f | 482 | static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) { |
c91e3ed3 MW |
483 | char buf[ADNS_ADDR2TEXT_BUFLEN]; |
484 | int len= sizeof(buf); | |
485 | int err; | |
828d89bd | 486 | |
487 | switch (rrp->addr.inet.sin_family) { | |
488 | case AF_INET: | |
b365d68a | 489 | CSP_ADDSTR("INET "); |
c91e3ed3 MW |
490 | goto a2t; |
491 | case AF_INET6: | |
492 | CSP_ADDSTR("INET6 "); | |
493 | goto a2t; | |
494 | a2t: | |
495 | err= adns_addr2text(&rrp->addr.sa,0, buf,&len, 0); assert(!err); | |
496 | CSP_ADDSTR(buf); | |
828d89bd | 497 | break; |
498 | default: | |
499 | sprintf(buf,"AF=%u",rrp->addr.sa.sa_family); | |
1dfe95d8 | 500 | CSP_ADDSTR(buf); |
828d89bd | 501 | break; |
502 | } | |
503 | return adns_s_ok; | |
504 | } | |
505 | ||
1dfe95d8 | 506 | static adns_status cs_addr(vbuf *vb, const void *datap) { |
551ff40f | 507 | const adns_rr_addr *rrp= datap; |
1dfe95d8 | 508 | |
509 | return csp_addr(vb,rrp); | |
510 | } | |
511 | ||
b0a32b17 MW |
512 | static int gsz_addr(const typeinfo *typei, adns_rrtype type) { |
513 | return type & adns__qtf_bigaddr ? | |
514 | sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only); | |
515 | } | |
516 | ||
92c8ebba MW |
517 | static unsigned addr_rrtypes(adns_state ads, adns_rrtype type, |
518 | adns_queryflags qf) { | |
519 | /* Return a mask of addr_rf_... flags indicating which address families are | |
520 | * wanted, given a query type and flags. | |
521 | */ | |
42938084 MW |
522 | |
523 | adns_queryflags permitaf= 0; | |
524 | unsigned want= 0; | |
525 | ||
526 | if (!(type & adns__qtf_bigaddr)) | |
527 | qf= (qf & ~adns_qf_want_allaf) | adns_qf_want_ipv4; | |
528 | else { | |
529 | if (!(qf & adns_qf_want_allaf)) { | |
530 | qf |= (type & adns__qtf_manyaf) ? | |
531 | adns_qf_want_allaf : adns_qf_want_ipv4; | |
532 | } | |
533 | if (ads->iflags & adns_if_permit_ipv4) permitaf |= adns_qf_want_ipv4; | |
534 | if (ads->iflags & adns_if_permit_ipv6) permitaf |= adns_qf_want_ipv6; | |
535 | if (qf & permitaf) qf &= permitaf | ~adns_qf_want_allaf; | |
536 | } | |
537 | ||
538 | if (qf & adns_qf_want_ipv4) want |= addr_rf_a; | |
539 | if (qf & adns_qf_want_ipv6) want |= addr_rf_aaaa; | |
540 | ||
541 | return want; | |
92c8ebba MW |
542 | } |
543 | ||
544 | static void icb_addr(adns_query parent, adns_query child); | |
545 | ||
546 | static void addr_subqueries(adns_query qu, struct timeval now, | |
547 | adns_queryflags qf_extra, | |
548 | const byte *qd_dgram, int qd_dglen) { | |
549 | int i, err, id; | |
550 | adns_query cqu; | |
551 | adns_queryflags qf= (qu->flags & ~adns_qf_search) | qf_extra; | |
552 | adns_rrtype qtf= qu->answer->type & adns__qtf_deref; | |
553 | unsigned which= qu->ctx.tinfo.addr.want & ~qu->ctx.tinfo.addr.have; | |
554 | qcontext ctx; | |
555 | ||
556 | memset(&ctx, 0, sizeof(ctx)); | |
557 | ctx.callback= icb_addr; | |
558 | for (i=0; i<addr_nrrtypes; i++) { | |
559 | if (!(which & (1 << i))) continue; | |
560 | err= adns__mkquery_frdgram(qu->ads, &qu->vb, &id, qd_dgram,qd_dglen, | |
561 | DNS_HDRSIZE, addr_all_rrtypes[i], qf); | |
562 | if (err) goto x_error; | |
563 | err= adns__internal_submit(qu->ads, &cqu, qu, &tinfo_addrsub, | |
564 | addr_all_rrtypes[i] | qtf, | |
565 | &qu->vb, id, qf, now, &ctx); | |
566 | if (err) goto x_error; | |
567 | cqu->answer->rrsz= qu->answer->rrsz; | |
568 | } | |
569 | qu->state= query_childw; | |
570 | LIST_LINK_TAIL(qu->ads->childw, qu); | |
571 | return; | |
572 | ||
573 | x_error: | |
574 | adns__query_fail(qu, err); | |
575 | } | |
576 | ||
b5e689a3 MW |
577 | static adns_status addr_submit(adns_query parent, adns_query *query_r, |
578 | vbuf *qumsg_vb, int id, unsigned want, | |
579 | adns_queryflags flags, struct timeval now, | |
580 | qcontext *ctx) { | |
581 | /* This is effectively a substitute for adns__internal_submit, intended for | |
582 | * the case where the caller (possibly) only wants a subset of the | |
583 | * available record types. The memory management and callback rules are | |
584 | * the same as for adns__internal_submit. | |
585 | * | |
586 | * Some differences: the query is linked onto the parent's children list | |
587 | * before exit (though the parent's state is not changed, and it is not | |
588 | * linked into the childw list queue); and we fiddle with the `tinfo' | |
589 | * portion of the context structure (yes, modifying *ctx), since this is, | |
590 | * in fact, the main purpose of this function. | |
591 | */ | |
592 | ||
593 | adns_state ads= parent->ads; | |
594 | adns_query qu; | |
595 | adns_status err; | |
596 | adns_rrtype type= ((adns_r_addr & adns_rrt_reprmask) | | |
597 | (parent->answer->type & ~adns_rrt_reprmask)); | |
598 | ||
599 | ctx->tinfo.addr.want= want; | |
600 | ctx->tinfo.addr.have= 0; | |
601 | err= adns__internal_submit(ads, &qu, parent, adns__findtype(adns_r_addr), | |
602 | type, qumsg_vb, id, flags, now, ctx); | |
603 | if (err) return err; | |
604 | ||
605 | *query_r= qu; | |
606 | return adns_s_ok; | |
607 | } | |
608 | ||
92c8ebba MW |
609 | static adns_status append_addrs(adns_query qu, size_t rrsz, |
610 | adns_rr_addr **dp, int *dlen, | |
611 | const adns_rr_addr *sp, int slen) { | |
612 | /* Append a vector of slen addr records, each of size rrsz, starting at ap, | |
613 | * to a vector starting at *dp, of length *dlen. On successful completion, | |
614 | * *dp and *dlen are updated. | |
615 | */ | |
616 | ||
617 | size_t drrsz= *dlen*rrsz, srrsz= slen*rrsz; | |
618 | byte *p; | |
619 | ||
620 | if (!slen) return adns_s_ok; | |
621 | p= adns__alloc_interim(qu, drrsz + srrsz); | |
622 | if (!p) R_NOMEM; | |
623 | if (*dlen) { | |
624 | memcpy(p, *dp, drrsz); | |
625 | adns__free_interim(qu, *dp); | |
626 | } | |
627 | memcpy(p + drrsz, sp, srrsz); | |
628 | *dlen += slen; | |
629 | *dp= (adns_rr_addr *)p; | |
630 | return adns_s_ok; | |
631 | } | |
632 | ||
633 | static void propagate_ttl(adns_query to, adns_query from) | |
634 | { if (to->expires > from->expires) to->expires= from->expires; } | |
635 | ||
636 | static adns_status copy_cname_from_child(adns_query parent, adns_query child) { | |
637 | adns_answer *pans= parent->answer, *cans= child->answer; | |
638 | size_t n= strlen(cans->cname) + 1; | |
639 | ||
640 | pans->cname= adns__alloc_preserved(parent, n); | |
641 | if (!pans->cname) R_NOMEM; | |
642 | memcpy(pans->cname, cans->cname, n); | |
643 | return adns_s_ok; | |
644 | } | |
645 | ||
646 | static void done_addr_type(adns_query qu, adns_rrtype type) { | |
647 | unsigned f= addr_rrtypeflag(type); | |
648 | assert(f); qu->ctx.tinfo.addr.have |= f; | |
649 | } | |
650 | ||
651 | static void icb_addr(adns_query parent, adns_query child) { | |
652 | adns_state ads= parent->ads; | |
653 | adns_answer *pans= parent->answer, *cans= child->answer; | |
654 | struct timeval now; | |
655 | adns_status err; | |
c4cb1794 | 656 | adns_queryflags qf; |
761ea684 | 657 | int id, r; |
92c8ebba MW |
658 | |
659 | propagate_ttl(parent, child); | |
660 | ||
c4cb1794 MW |
661 | if (!(child->flags & adns__qf_addr_cname) && |
662 | (parent->flags & adns__qf_addr_answer) && | |
663 | (!!pans->cname != !!cans->cname || | |
664 | (pans->cname && strcmp(pans->cname, cans->cname)))) { | |
665 | /* We've detected an inconsistency in CNAME records, and must deploy | |
666 | * countermeasures. | |
667 | */ | |
668 | ||
669 | if (!pans->cname) { | |
670 | /* The child has a CNAME record, but the parent doesn't. We must | |
671 | * discard all of the parent's addresses, and substitute the child's. | |
672 | */ | |
673 | ||
674 | assert(pans->rrsz == cans->rrsz); | |
675 | adns__free_interim(parent, pans->rrs.bytes); | |
676 | adns__transfer_interim(child, parent, cans->rrs.bytes); | |
677 | pans->rrs.bytes= cans->rrs.bytes; | |
678 | pans->nrrs= cans->nrrs; | |
679 | parent->ctx.tinfo.addr.have= 0; | |
680 | done_addr_type(parent, cans->type); | |
681 | err= copy_cname_from_child(parent, child); if (err) goto x_err; | |
682 | } | |
683 | ||
684 | /* We've settled on the CNAME (now) associated with the parent, which | |
685 | * already has appropriate address records. Build a query datagram for | |
686 | * this name so that we can issue child queries for the missing address | |
687 | * families. The child's vbuf looks handy for this. | |
688 | */ | |
689 | err= adns__mkquery(ads, &child->vb, &id, pans->cname, | |
690 | strlen(pans->cname), &tinfo_addrsub, | |
691 | adns_r_addr, parent->flags); | |
692 | if (err) goto x_err; | |
693 | ||
694 | /* Now cancel the remaining children, and try again with the CNAME we've | |
695 | * settled on. | |
696 | */ | |
697 | adns__cancel_children(parent); | |
761ea684 | 698 | r= gettimeofday(&now, 0); if (r) goto x_gtod; |
c4cb1794 MW |
699 | qf= adns__qf_addr_cname; |
700 | if (!(parent->flags & adns_qf_cname_loose)) qf |= adns_qf_cname_forbid; | |
701 | addr_subqueries(parent, now, qf, child->vb.buf, child->vb.used); | |
702 | return; | |
703 | } | |
704 | ||
92c8ebba MW |
705 | if (cans->cname && !pans->cname) { |
706 | err= copy_cname_from_child(parent, child); | |
707 | if (err) goto x_err; | |
708 | } | |
709 | ||
710 | if ((parent->flags & adns_qf_search) && | |
711 | !pans->cname && cans->status == adns_s_nxdomain) { | |
712 | /* We're searching a list of suffixes, and the name doesn't exist. Try | |
713 | * the next one. | |
714 | */ | |
715 | ||
716 | adns__cancel_children(parent); | |
717 | adns__free_interim(parent, pans->rrs.bytes); | |
718 | pans->rrs.bytes= 0; pans->nrrs= 0; | |
761ea684 | 719 | r= gettimeofday(&now, 0); if (r) goto x_gtod; |
92c8ebba MW |
720 | adns__search_next(ads, parent, now); |
721 | return; | |
722 | } | |
723 | ||
724 | if (cans->status && cans->status != adns_s_nodata) | |
725 | { err= cans->status; goto x_err; } | |
726 | ||
727 | assert(pans->rrsz == cans->rrsz); | |
728 | err= append_addrs(parent, pans->rrsz, | |
729 | &pans->rrs.addr, &pans->nrrs, | |
730 | cans->rrs.addr, cans->nrrs); | |
731 | if (err) goto x_err; | |
732 | done_addr_type(parent, cans->type); | |
733 | ||
734 | if (parent->children.head) LIST_LINK_TAIL(ads->childw, parent); | |
735 | else if (!pans->nrrs) adns__query_fail(parent, adns_s_nodata); | |
736 | else adns__query_done(parent); | |
c4cb1794 | 737 | parent->flags |= adns__qf_addr_answer; |
92c8ebba MW |
738 | return; |
739 | ||
740 | x_gtod: | |
761ea684 IJ |
741 | /* We have our own error handling, because adns__must_gettimeofday |
742 | * handles errors by calling adns_globalsystemfailure, which would | |
743 | * reenter the query processing logic. */ | |
92c8ebba MW |
744 | adns__diag(ads, -1, parent, "gettimeofday failed: %s", strerror(errno)); |
745 | err= adns_s_systemfail; | |
746 | goto x_err; | |
747 | ||
748 | x_err: | |
749 | adns__query_fail(parent, err); | |
750 | } | |
751 | ||
752 | static void qs_addr(adns_query qu, struct timeval now) { | |
753 | if (!qu->ctx.tinfo.addr.want) { | |
754 | qu->ctx.tinfo.addr.want= addr_rrtypes(qu->ads, qu->answer->type, | |
755 | qu->flags); | |
756 | qu->ctx.tinfo.addr.have= 0; | |
757 | } | |
758 | addr_subqueries(qu, now, 0, qu->query_dgram, qu->query_dglen); | |
759 | } | |
760 | ||
eb81d633 | 761 | /* |
b365d68a | 762 | * _domain (pap,csp,cs) |
763 | * _dom_raw (pa) | |
eb81d633 | 764 | */ |
765 | ||
1dfe95d8 | 766 | static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max, |
767 | char **domain_r, parsedomain_flags flags) { | |
e062dcae | 768 | adns_status st; |
769 | char *dm; | |
770 | ||
1dfe95d8 | 771 | st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags, |
772 | pai->dgram,pai->dglen, cbyte_io, max); | |
e062dcae | 773 | if (st) return st; |
1dfe95d8 | 774 | if (!pai->qu->vb.used) return adns_s_invaliddata; |
e062dcae | 775 | |
1dfe95d8 | 776 | dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1); |
777 | if (!dm) R_NOMEM; | |
e062dcae | 778 | |
1dfe95d8 | 779 | dm[pai->qu->vb.used]= 0; |
780 | memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used); | |
e062dcae | 781 | |
782 | *domain_r= dm; | |
783 | return adns_s_ok; | |
784 | } | |
785 | ||
b365d68a | 786 | static adns_status csp_domain(vbuf *vb, const char *domain) { |
787 | CSP_ADDSTR(domain); | |
788 | if (!*domain) CSP_ADDSTR("."); | |
789 | return adns_s_ok; | |
790 | } | |
791 | ||
792 | static adns_status cs_domain(vbuf *vb, const void *datap) { | |
793 | const char *const *domainp= datap; | |
794 | return csp_domain(vb,*domainp); | |
795 | } | |
796 | ||
609133ee | 797 | static adns_status pa_dom_raw(const parseinfo *pai, int cbyte, |
798 | int max, void *datap) { | |
b365d68a | 799 | char **rrp= datap; |
800 | adns_status st; | |
801 | ||
802 | st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok); | |
803 | if (st) return st; | |
804 | ||
805 | if (cbyte != max) return adns_s_invaliddata; | |
806 | return adns_s_ok; | |
807 | } | |
808 | ||
eb81d633 | 809 | /* |
810 | * _host_raw (pa) | |
811 | */ | |
812 | ||
609133ee | 813 | static adns_status pa_host_raw(const parseinfo *pai, int cbyte, |
814 | int max, void *datap) { | |
e062dcae | 815 | char **rrp= datap; |
ffbda80c | 816 | adns_status st; |
86e7b8d9 | 817 | |
1dfe95d8 | 818 | st= pap_domain(pai, &cbyte, max, rrp, |
819 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
e062dcae | 820 | if (st) return st; |
821 | ||
822 | if (cbyte != max) return adns_s_invaliddata; | |
823 | return adns_s_ok; | |
824 | } | |
ffbda80c | 825 | |
eb81d633 | 826 | /* |
382b81f7 | 827 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr) |
eb81d633 | 828 | */ |
c7836bc9 | 829 | |
1dfe95d8 | 830 | static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha, |
b5e689a3 | 831 | unsigned *want_io, size_t addrsz, |
1dfe95d8 | 832 | int *cbyte_io, int count, int dmstart) { |
833 | int rri, naddrs; | |
b5e689a3 MW |
834 | unsigned typef, want= *want_io, need= want; |
835 | int type, class, rdlen, rdend, rdstart, ownermatched; | |
73dba56e | 836 | unsigned long ttl; |
1dfe95d8 | 837 | adns_status st; |
c7836bc9 | 838 | |
b5e689a3 | 839 | for (rri=0, naddrs=0; rri<count; rri++) { |
609133ee | 840 | st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram, |
841 | pai->dglen, cbyte_io, | |
73dba56e | 842 | &type, &class, &ttl, &rdlen, &rdstart, |
1dfe95d8 | 843 | pai->dgram, pai->dglen, dmstart, &ownermatched); |
c7836bc9 | 844 | if (st) return st; |
b5e689a3 MW |
845 | if (!ownermatched || class != DNS_CLASS_IN) continue; |
846 | typef= addr_rrtypeflag(type); | |
847 | if (!(want & typef)) continue; | |
848 | need &= ~typef; | |
849 | if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*addrsz)) R_NOMEM; | |
73dba56e | 850 | adns__update_expires(pai->qu,ttl,pai->now); |
8a8511e2 | 851 | rdend= rdstart + rdlen; |
b5e689a3 | 852 | st= pap_addr(pai, type, addrsz, &rdstart, rdend, |
8a8511e2 | 853 | (adns_rr_addr *)(pai->qu->vb.buf + naddrs*addrsz)); |
c7836bc9 | 854 | if (st) return st; |
8a8511e2 | 855 | if (rdstart != rdend) return adns_s_invaliddata; |
1dfe95d8 | 856 | naddrs++; |
c7836bc9 | 857 | } |
b5e689a3 MW |
858 | if (naddrs > 0) { |
859 | st= append_addrs(pai->qu, addrsz, &ha->addrs, &ha->naddrs, | |
860 | (const adns_rr_addr *)pai->qu->vb.buf, naddrs); | |
861 | if (st) return st; | |
c7836bc9 | 862 | ha->astatus= adns_s_ok; |
1dfe95d8 | 863 | |
b5e689a3 MW |
864 | if (!need) { |
865 | adns__isort(ha->addrs, naddrs, addrsz, pai->qu->vb.buf, | |
866 | div_addr, pai->ads); | |
867 | } | |
c7836bc9 | 868 | } |
b5e689a3 | 869 | *want_io= need; |
c7836bc9 | 870 | return adns_s_ok; |
871 | } | |
872 | ||
551ff40f | 873 | static void icb_hostaddr(adns_query parent, adns_query child) { |
551ff40f | 874 | adns_answer *cans= child->answer; |
0ea82d76 | 875 | adns_rr_hostaddr *rrp= child->ctx.pinfo.hostaddr; |
4218fb9a | 876 | adns_state ads= parent->ads; |
b365d68a | 877 | adns_status st; |
b5e689a3 | 878 | size_t addrsz= gsz_addr(0, parent->answer->type); |
551ff40f | 879 | |
b5e689a3 MW |
880 | st= cans->status == adns_s_nodata ? adns_s_ok : cans->status; |
881 | if (st) goto done; | |
882 | propagate_ttl(parent, child); | |
883 | ||
884 | assert(addrsz == cans->rrsz); | |
885 | st= append_addrs(parent, addrsz, | |
886 | &rrp->addrs, &rrp->naddrs, | |
887 | cans->rrs.addr, cans->nrrs); | |
888 | if (st) goto done; | |
889 | if (!rrp->naddrs) { st= adns_s_nodata; goto done; } | |
890 | ||
891 | if (!adns__vbuf_ensure(&parent->vb, addrsz)) | |
892 | { st= adns_s_nomemory; goto done; } | |
893 | adns__isort(rrp->addrs, rrp->naddrs, addrsz, parent->vb.buf, | |
894 | div_addr, ads); | |
895 | ||
896 | done: | |
897 | if (st) { | |
898 | adns__free_interim(parent, rrp->addrs); | |
899 | rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : 0; | |
900 | } | |
a6536d8b | 901 | |
b5e689a3 | 902 | rrp->astatus= st; |
4218fb9a | 903 | if (parent->children.head) { |
904 | LIST_LINK_TAIL(ads->childw,parent); | |
905 | } else { | |
906 | adns__query_done(parent); | |
907 | } | |
551ff40f | 908 | } |
909 | ||
1dfe95d8 | 910 | static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io, |
911 | int max, adns_rr_hostaddr *rrp) { | |
c7836bc9 | 912 | adns_status st; |
913 | int dmstart, cbyte; | |
7da21070 | 914 | qcontext ctx; |
915 | int id; | |
916 | adns_query nqu; | |
4b707d8b | 917 | adns_queryflags nflags; |
b5e689a3 | 918 | unsigned want; |
b0a32b17 | 919 | size_t addrsz= gsz_addr(0, pai->qu->answer->type); |
c7836bc9 | 920 | |
921 | dmstart= cbyte= *cbyte_io; | |
1dfe95d8 | 922 | st= pap_domain(pai, &cbyte, max, &rrp->host, |
923 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
c7836bc9 | 924 | if (st) return st; |
925 | *cbyte_io= cbyte; | |
926 | ||
927 | rrp->astatus= adns_s_ok; | |
b5e689a3 | 928 | rrp->naddrs= 0; |
c7836bc9 | 929 | rrp->addrs= 0; |
930 | ||
1dfe95d8 | 931 | cbyte= pai->nsstart; |
c7836bc9 | 932 | |
b5e689a3 MW |
933 | want= addr_rrtypes(pai->ads, pai->qu->answer->type, pai->qu->flags); |
934 | ||
935 | st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->nscount, dmstart); | |
c7836bc9 | 936 | if (st) return st; |
b5e689a3 | 937 | if (!want) return adns_s_ok; |
c7836bc9 | 938 | |
b5e689a3 | 939 | st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->arcount, dmstart); |
c7836bc9 | 940 | if (st) return st; |
b5e689a3 | 941 | if (!want) return adns_s_ok; |
1dfe95d8 | 942 | |
7da21070 | 943 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
944 | pai->dgram, pai->dglen, dmstart, | |
945 | adns_r_addr, adns_qf_quoteok_query); | |
946 | if (st) return st; | |
551ff40f | 947 | |
a6536d8b | 948 | ctx.ext= 0; |
949 | ctx.callback= icb_hostaddr; | |
0ea82d76 | 950 | ctx.pinfo.hostaddr= rrp; |
4b707d8b | 951 | |
42938084 MW |
952 | nflags= adns_qf_quoteok_query | (pai->qu->flags & (adns_qf_want_allaf | |
953 | adns_qf_ipv6_mapv4)); | |
4b707d8b | 954 | if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid; |
955 | ||
b5e689a3 MW |
956 | st= addr_submit(pai->qu, &nqu, &pai->qu->vb, id, want, |
957 | nflags, pai->now, &ctx); | |
7da21070 | 958 | if (st) return st; |
959 | ||
1dfe95d8 | 960 | return adns_s_ok; |
c7836bc9 | 961 | } |
962 | ||
609133ee | 963 | static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, |
964 | int max, void *datap) { | |
1dfe95d8 | 965 | adns_rr_hostaddr *rrp= datap; |
c7836bc9 | 966 | adns_status st; |
c7836bc9 | 967 | |
1dfe95d8 | 968 | st= pap_hostaddr(pai, &cbyte, max, rrp); |
c7836bc9 | 969 | if (st) return st; |
970 | if (cbyte != max) return adns_s_invaliddata; | |
971 | ||
1dfe95d8 | 972 | return adns_s_ok; |
973 | } | |
c7836bc9 | 974 | |
609133ee | 975 | static int dip_hostaddr(adns_state ads, |
976 | const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) { | |
1dfe95d8 | 977 | if (ap->astatus != bp->astatus) return ap->astatus; |
978 | if (ap->astatus) return 0; | |
c7836bc9 | 979 | |
f930c455 | 980 | return dip_sockaddr(ads, &ap->addrs[0].addr.sa, &bp->addrs[0].addr.sa); |
1dfe95d8 | 981 | } |
982 | ||
609133ee | 983 | static int di_hostaddr(adns_state ads, |
984 | const void *datap_a, const void *datap_b) { | |
1dfe95d8 | 985 | const adns_rr_hostaddr *ap= datap_a, *bp= datap_b; |
986 | ||
09957b1c | 987 | return dip_hostaddr(ads, ap,bp); |
c7836bc9 | 988 | } |
989 | ||
eb81d633 | 990 | static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) { |
991 | void *tablev; | |
b0a32b17 | 992 | size_t addrsz= gsz_addr(0, qu->answer->type); |
e062dcae | 993 | |
eb81d633 | 994 | adns__makefinal_str(qu,&rrp->host); |
995 | tablev= rrp->addrs; | |
b0a32b17 | 996 | adns__makefinal_block(qu, &tablev, rrp->naddrs*addrsz); |
eb81d633 | 997 | rrp->addrs= tablev; |
e062dcae | 998 | } |
999 | ||
eb81d633 | 1000 | static void mf_hostaddr(adns_query qu, void *datap) { |
1001 | adns_rr_hostaddr *rrp= datap; | |
e062dcae | 1002 | |
eb81d633 | 1003 | mfp_hostaddr(qu,rrp); |
e062dcae | 1004 | } |
1005 | ||
1dfe95d8 | 1006 | static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) { |
a6f1dc92 | 1007 | const char *errstr; |
1dfe95d8 | 1008 | adns_status st; |
ac77ffc1 | 1009 | char buf[20]; |
1dfe95d8 | 1010 | int i; |
1011 | ||
a6f1dc92 | 1012 | st= csp_domain(vb,rrp->host); if (st) return st; |
1dfe95d8 | 1013 | |
b365d68a | 1014 | CSP_ADDSTR(" "); |
ac77ffc1 | 1015 | CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus)); |
1016 | ||
1017 | sprintf(buf," %d ",rrp->astatus); | |
1018 | CSP_ADDSTR(buf); | |
a6f1dc92 | 1019 | |
ac77ffc1 | 1020 | CSP_ADDSTR(adns_errabbrev(rrp->astatus)); |
a6f1dc92 | 1021 | CSP_ADDSTR(" "); |
ac77ffc1 | 1022 | |
a6f1dc92 | 1023 | errstr= adns_strerror(rrp->astatus); |
1024 | st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st; | |
b365d68a | 1025 | |
1026 | if (rrp->naddrs >= 0) { | |
1027 | CSP_ADDSTR(" ("); | |
1028 | for (i=0; i<rrp->naddrs; i++) { | |
1029 | CSP_ADDSTR(" "); | |
1dfe95d8 | 1030 | st= csp_addr(vb,&rrp->addrs[i]); |
1031 | } | |
b365d68a | 1032 | CSP_ADDSTR(" )"); |
1033 | } else { | |
1034 | CSP_ADDSTR(" ?"); | |
1dfe95d8 | 1035 | } |
1036 | return adns_s_ok; | |
1037 | } | |
1038 | ||
1039 | static adns_status cs_hostaddr(vbuf *vb, const void *datap) { | |
1040 | const adns_rr_hostaddr *rrp= datap; | |
1041 | ||
1042 | return csp_hostaddr(vb,rrp); | |
1043 | } | |
1044 | ||
eb81d633 | 1045 | /* |
1046 | * _mx_raw (pa,di) | |
1047 | */ | |
1dfe95d8 | 1048 | |
609133ee | 1049 | static adns_status pa_mx_raw(const parseinfo *pai, int cbyte, |
1050 | int max, void *datap) { | |
eb81d633 | 1051 | const byte *dgram= pai->dgram; |
1052 | adns_rr_intstr *rrp= datap; | |
1053 | adns_status st; | |
1054 | int pref; | |
1dfe95d8 | 1055 | |
eb81d633 | 1056 | if (cbyte+2 > max) return adns_s_invaliddata; |
1057 | GET_W(cbyte,pref); | |
1058 | rrp->i= pref; | |
1059 | st= pap_domain(pai, &cbyte, max, &rrp->str, | |
1060 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1061 | if (st) return st; | |
1dfe95d8 | 1062 | |
eb81d633 | 1063 | if (cbyte != max) return adns_s_invaliddata; |
1064 | return adns_s_ok; | |
1065 | } | |
1dfe95d8 | 1066 | |
09957b1c | 1067 | static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) { |
eb81d633 | 1068 | const adns_rr_intstr *ap= datap_a, *bp= datap_b; |
1069 | ||
1070 | if (ap->i < bp->i) return 0; | |
1071 | if (ap->i > bp->i) return 1; | |
1072 | return 0; | |
1dfe95d8 | 1073 | } |
1074 | ||
eb81d633 | 1075 | /* |
1076 | * _mx (pa,di) | |
1077 | */ | |
1dfe95d8 | 1078 | |
609133ee | 1079 | static adns_status pa_mx(const parseinfo *pai, int cbyte, |
1080 | int max, void *datap) { | |
eb81d633 | 1081 | const byte *dgram= pai->dgram; |
1082 | adns_rr_inthostaddr *rrp= datap; | |
1083 | adns_status st; | |
1084 | int pref; | |
1085 | ||
1086 | if (cbyte+2 > max) return adns_s_invaliddata; | |
1087 | GET_W(cbyte,pref); | |
1088 | rrp->i= pref; | |
1089 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); | |
1090 | if (st) return st; | |
1091 | ||
1092 | if (cbyte != max) return adns_s_invaliddata; | |
1093 | return adns_s_ok; | |
1094 | } | |
1095 | ||
09957b1c | 1096 | static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) { |
eb81d633 | 1097 | const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b; |
1098 | ||
1099 | if (ap->i < bp->i) return 0; | |
1100 | if (ap->i > bp->i) return 1; | |
09957b1c | 1101 | return dip_hostaddr(ads, &ap->ha, &bp->ha); |
1dfe95d8 | 1102 | } |
1103 | ||
eb81d633 | 1104 | /* |
1105 | * _inthostaddr (mf,cs) | |
1106 | */ | |
1107 | ||
1dfe95d8 | 1108 | static void mf_inthostaddr(adns_query qu, void *datap) { |
1109 | adns_rr_inthostaddr *rrp= datap; | |
1110 | ||
1111 | mfp_hostaddr(qu,&rrp->ha); | |
1112 | } | |
1113 | ||
eb81d633 | 1114 | static adns_status cs_inthostaddr(vbuf *vb, const void *datap) { |
1115 | const adns_rr_inthostaddr *rrp= datap; | |
1116 | char buf[10]; | |
e062dcae | 1117 | |
eb81d633 | 1118 | sprintf(buf,"%u ",rrp->i); |
1119 | CSP_ADDSTR(buf); | |
1120 | ||
1121 | return csp_hostaddr(vb,&rrp->ha); | |
ffbda80c | 1122 | } |
1123 | ||
eb81d633 | 1124 | /* |
b365d68a | 1125 | * _inthost (cs) |
1126 | */ | |
1127 | ||
1128 | static adns_status cs_inthost(vbuf *vb, const void *datap) { | |
1129 | const adns_rr_intstr *rrp= datap; | |
1130 | char buf[10]; | |
1131 | ||
1132 | sprintf(buf,"%u ",rrp->i); | |
1133 | CSP_ADDSTR(buf); | |
1134 | return csp_domain(vb,rrp->str); | |
1135 | } | |
1136 | ||
1137 | /* | |
938b0228 | 1138 | * _ptr (ckl,pa +icb_ptr) |
a6536d8b | 1139 | */ |
1140 | ||
938b0228 MW |
1141 | static adns_status ckl_ptr(adns_state ads, adns_queryflags flags, |
1142 | union checklabel_state *cls, qcontext *ctx, | |
078f9acc IJ |
1143 | int labnum, const char *dgram, |
1144 | int labstart, int lablen) { | |
9c6ba699 | 1145 | if (lablen) { |
4e6c13df | 1146 | if (!adns__revparse_label(&cls->ptr, labnum, dgram,labstart,lablen)) |
9c6ba699 | 1147 | return adns_s_querydomainwrong; |
938b0228 | 1148 | } else { |
4e6c13df IJ |
1149 | if (!adns__revparse_done(&cls->ptr, dgram, labnum, |
1150 | &ctx->tinfo.ptr.rev_rrtype, | |
1151 | &ctx->tinfo.ptr.addr)) | |
9c6ba699 | 1152 | return adns_s_querydomainwrong; |
938b0228 MW |
1153 | } |
1154 | return adns_s_ok; | |
1155 | } | |
1156 | ||
a6536d8b | 1157 | static void icb_ptr(adns_query parent, adns_query child) { |
1158 | adns_answer *cans= child->answer; | |
421c1f2e | 1159 | const adns_sockaddr *queried; |
ac5a2748 | 1160 | const unsigned char *found; |
4218fb9a | 1161 | adns_state ads= parent->ads; |
a6536d8b | 1162 | int i; |
1163 | ||
1164 | if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) { | |
1165 | adns__query_fail(parent,adns_s_inconsistent); | |
1166 | return; | |
1167 | } else if (cans->status) { | |
1168 | adns__query_fail(parent,cans->status); | |
1169 | return; | |
1170 | } | |
1171 | ||
ac5a2748 MW |
1172 | queried= &parent->ctx.tinfo.ptr.addr; |
1173 | for (i=0, found=cans->rrs.bytes; i<cans->nrrs; i++, found+=cans->rrsz) { | |
421c1f2e IJ |
1174 | if (adns__addrs_equal_raw(&queried->sa, |
1175 | parent->ctx.tinfo.ptr.addr.sa.sa_family,found)) { | |
4218fb9a | 1176 | if (!parent->children.head) { |
1177 | adns__query_done(parent); | |
1178 | return; | |
1179 | } else { | |
1180 | LIST_LINK_TAIL(ads->childw,parent); | |
1181 | return; | |
1182 | } | |
a6536d8b | 1183 | } |
1184 | } | |
1185 | ||
1186 | adns__query_fail(parent,adns_s_inconsistent); | |
1187 | } | |
1188 | ||
609133ee | 1189 | static adns_status pa_ptr(const parseinfo *pai, int dmstart, |
1190 | int max, void *datap) { | |
a6536d8b | 1191 | char **rrp= datap; |
1192 | adns_status st; | |
9c6ba699 | 1193 | adns_rrtype rrtype= pai->qu->ctx.tinfo.ptr.rev_rrtype; |
938b0228 | 1194 | int cbyte, id; |
a6536d8b | 1195 | adns_query nqu; |
1196 | qcontext ctx; | |
1197 | ||
1198 | cbyte= dmstart; | |
1199 | st= pap_domain(pai, &cbyte, max, rrp, | |
1200 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1201 | if (st) return st; | |
1202 | if (cbyte != max) return adns_s_invaliddata; | |
1203 | ||
a6536d8b | 1204 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
1205 | pai->dgram, pai->dglen, dmstart, | |
9c6ba699 | 1206 | rrtype, adns_qf_quoteok_query); |
a6536d8b | 1207 | if (st) return st; |
1208 | ||
1209 | ctx.ext= 0; | |
1210 | ctx.callback= icb_ptr; | |
0ea82d76 MW |
1211 | memset(&ctx.pinfo,0,sizeof(ctx.pinfo)); |
1212 | memset(&ctx.tinfo,0,sizeof(ctx.tinfo)); | |
e2ae1741 IJ |
1213 | st= adns__internal_submit(pai->ads, &nqu, pai->qu, |
1214 | adns__findtype(rrtype), | |
9c6ba699 MW |
1215 | rrtype, &pai->qu->vb, id, |
1216 | adns_qf_quoteok_query, pai->now, &ctx); | |
a6536d8b | 1217 | if (st) return st; |
1218 | ||
a6536d8b | 1219 | return adns_s_ok; |
1220 | } | |
1221 | ||
1222 | /* | |
b365d68a | 1223 | * _strpair (mf) |
9ec44266 | 1224 | */ |
1225 | ||
1226 | static void mf_strpair(adns_query qu, void *datap) { | |
1227 | adns_rr_strpair *rrp= datap; | |
1228 | ||
1229 | adns__makefinal_str(qu,&rrp->array[0]); | |
1230 | adns__makefinal_str(qu,&rrp->array[1]); | |
1231 | } | |
1232 | ||
9ec44266 | 1233 | /* |
b365d68a | 1234 | * _intstrpair (mf) |
9ec44266 | 1235 | */ |
1236 | ||
1237 | static void mf_intstrpair(adns_query qu, void *datap) { | |
1238 | adns_rr_intstrpair *rrp= datap; | |
1239 | ||
1240 | adns__makefinal_str(qu,&rrp->array[0].str); | |
1241 | adns__makefinal_str(qu,&rrp->array[1].str); | |
1242 | } | |
1243 | ||
9ec44266 | 1244 | /* |
1245 | * _hinfo (pa) | |
1246 | */ | |
1247 | ||
609133ee | 1248 | static adns_status pa_hinfo(const parseinfo *pai, int cbyte, |
1249 | int max, void *datap) { | |
9ec44266 | 1250 | adns_rr_intstrpair *rrp= datap; |
1251 | adns_status st; | |
1252 | int i; | |
1253 | ||
1254 | for (i=0; i<2; i++) { | |
b365d68a | 1255 | st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str); |
9ec44266 | 1256 | if (st) return st; |
1257 | } | |
1258 | ||
1259 | if (cbyte != max) return adns_s_invaliddata; | |
1260 | ||
1261 | return adns_s_ok; | |
1262 | } | |
1263 | ||
1264 | /* | |
382b81f7 | 1265 | * _mailbox (pap,cs +pap_mailbox822) |
9ec44266 | 1266 | */ |
1267 | ||
609133ee | 1268 | static adns_status pap_mailbox822(const parseinfo *pai, |
1269 | int *cbyte_io, int max, char **mb_r) { | |
eaa44731 | 1270 | int lablen, labstart, i, needquote, c, r, neednorm; |
1271 | const unsigned char *p; | |
1272 | char *str; | |
1273 | findlabel_state fls; | |
1274 | adns_status st; | |
1275 | vbuf *vb; | |
1276 | ||
1277 | vb= &pai->qu->vb; | |
1278 | vb->used= 0; | |
1279 | adns__findlabel_start(&fls, pai->ads, | |
1280 | -1, pai->qu, | |
1281 | pai->dgram, pai->dglen, max, | |
1282 | *cbyte_io, cbyte_io); | |
1283 | st= adns__findlabel_next(&fls,&lablen,&labstart); | |
1284 | if (!lablen) { | |
b365d68a | 1285 | adns__vbuf_appendstr(vb,"."); |
eaa44731 | 1286 | goto x_ok; |
1287 | } | |
1288 | ||
1289 | neednorm= 1; | |
1290 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) { | |
1291 | c= *p++; | |
1292 | if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata; | |
1293 | if (c == '.' && !neednorm) neednorm= 1; | |
7672a872 | 1294 | else if (c==' ' || c>=127 || ctype_822special(c)) needquote++; |
eaa44731 | 1295 | else neednorm= 0; |
1296 | } | |
1297 | ||
1298 | if (needquote || neednorm) { | |
1299 | r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM; | |
1300 | adns__vbuf_appendq(vb,"\"",1); | |
1301 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) { | |
1302 | c= *p; | |
b365d68a | 1303 | if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1); |
eaa44731 | 1304 | adns__vbuf_appendq(vb,p,1); |
1305 | } | |
1306 | adns__vbuf_appendq(vb,"\"",1); | |
1307 | } else { | |
1308 | r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM; | |
1309 | } | |
1310 | ||
1311 | r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM; | |
1312 | ||
1313 | st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram); | |
1314 | if (st) return st; | |
1315 | ||
1316 | x_ok: | |
1317 | str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM; | |
1318 | memcpy(str,vb->buf,vb->used); | |
1319 | str[vb->used]= 0; | |
1320 | *mb_r= str; | |
1321 | return adns_s_ok; | |
9ec44266 | 1322 | } |
1323 | ||
9da4a044 | 1324 | static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max, |
1325 | char **mb_r) { | |
2c6eb096 | 1326 | if (pai->qu->typei->typekey & adns__qtf_mail822) { |
9da4a044 | 1327 | return pap_mailbox822(pai, cbyte_io, max, mb_r); |
1328 | } else { | |
b365d68a | 1329 | return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok); |
9da4a044 | 1330 | } |
1331 | } | |
1332 | ||
b365d68a | 1333 | static adns_status csp_mailbox(vbuf *vb, const char *mailbox) { |
1334 | return csp_domain(vb,mailbox); | |
1335 | } | |
1336 | ||
9ec44266 | 1337 | /* |
b365d68a | 1338 | * _rp (pa,cs) |
9ec44266 | 1339 | */ |
1340 | ||
609133ee | 1341 | static adns_status pa_rp(const parseinfo *pai, int cbyte, |
1342 | int max, void *datap) { | |
9ec44266 | 1343 | adns_rr_strpair *rrp= datap; |
1344 | adns_status st; | |
1345 | ||
1346 | st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]); | |
1347 | if (st) return st; | |
1348 | ||
1349 | st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok); | |
1350 | if (st) return st; | |
1351 | ||
1352 | if (cbyte != max) return adns_s_invaliddata; | |
1353 | return adns_s_ok; | |
1354 | } | |
1355 | ||
b365d68a | 1356 | static adns_status cs_rp(vbuf *vb, const void *datap) { |
1357 | const adns_rr_strpair *rrp= datap; | |
1358 | adns_status st; | |
1359 | ||
1360 | st= csp_mailbox(vb,rrp->array[0]); if (st) return st; | |
1361 | CSP_ADDSTR(" "); | |
1362 | st= csp_domain(vb,rrp->array[1]); if (st) return st; | |
1363 | ||
1364 | return adns_s_ok; | |
1365 | } | |
1366 | ||
9ec44266 | 1367 | /* |
1368 | * _soa (pa,mf,cs) | |
1369 | */ | |
1370 | ||
609133ee | 1371 | static adns_status pa_soa(const parseinfo *pai, int cbyte, |
1372 | int max, void *datap) { | |
9ec44266 | 1373 | adns_rr_soa *rrp= datap; |
1374 | const byte *dgram= pai->dgram; | |
1375 | adns_status st; | |
1376 | int msw, lsw, i; | |
1377 | ||
1378 | st= pap_domain(pai, &cbyte, max, &rrp->mname, | |
1379 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1380 | if (st) return st; | |
1381 | ||
1382 | st= pap_mailbox(pai, &cbyte, max, &rrp->rname); | |
1383 | if (st) return st; | |
1384 | ||
1385 | if (cbyte+20 != max) return adns_s_invaliddata; | |
1386 | ||
1387 | for (i=0; i<5; i++) { | |
1388 | GET_W(cbyte,msw); | |
1389 | GET_W(cbyte,lsw); | |
1390 | (&rrp->serial)[i]= (msw<<16) | lsw; | |
1391 | } | |
1392 | ||
1393 | return adns_s_ok; | |
1394 | } | |
1395 | ||
1396 | static void mf_soa(adns_query qu, void *datap) { | |
1397 | adns_rr_soa *rrp= datap; | |
1398 | ||
1399 | adns__makefinal_str(qu,&rrp->mname); | |
1400 | adns__makefinal_str(qu,&rrp->rname); | |
1401 | } | |
1402 | ||
1403 | static adns_status cs_soa(vbuf *vb, const void *datap) { | |
1404 | const adns_rr_soa *rrp= datap; | |
1405 | char buf[20]; | |
1406 | int i; | |
1407 | adns_status st; | |
1408 | ||
b365d68a | 1409 | st= csp_domain(vb,rrp->mname); if (st) return st; |
9ec44266 | 1410 | CSP_ADDSTR(" "); |
b365d68a | 1411 | st= csp_mailbox(vb,rrp->rname); if (st) return st; |
9ec44266 | 1412 | |
1413 | for (i=0; i<5; i++) { | |
1414 | sprintf(buf," %lu",(&rrp->serial)[i]); | |
1415 | CSP_ADDSTR(buf); | |
1416 | } | |
1417 | ||
1418 | return adns_s_ok; | |
1419 | } | |
1420 | ||
1421 | /* | |
e8e5aeac | 1422 | * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort) |
d19b03d0 | 1423 | */ |
1424 | ||
e8e5aeac MW |
1425 | static adns_status ckl_srv(adns_state ads, adns_queryflags flags, |
1426 | union checklabel_state *cls, qcontext *ctx, | |
078f9acc IJ |
1427 | int labnum, const char *dgram, |
1428 | int labstart, int lablen) { | |
1429 | const char *label = dgram+labstart; | |
96b22fa5 IJ |
1430 | if (labnum < 2) { |
1431 | if (flags & adns_qf_quoteok_query) return adns_s_ok; | |
e8e5aeac MW |
1432 | if (!lablen || label[0] != '_') return adns_s_querydomaininvalid; |
1433 | return adns_s_ok; | |
d19b03d0 | 1434 | } |
078f9acc | 1435 | return adns__ckl_hostname(ads,flags, cls,ctx, labnum, dgram,labstart,lablen); |
d19b03d0 | 1436 | } |
1437 | ||
05fc6b3a | 1438 | static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max, |
0e45654b | 1439 | adns_rr_srvha *rrp |
1440 | /* might be adns_rr_srvraw* */) { | |
401c256a | 1441 | const byte *dgram= pai->dgram; |
05fc6b3a | 1442 | int ti, cbyte; |
1443 | ||
1444 | cbyte= *cbyte_io; | |
1445 | if ((*cbyte_io += 6) > max) return adns_s_invaliddata; | |
401c256a | 1446 | |
1447 | rrp->priority= GET_W(cbyte, ti); | |
1448 | rrp->weight= GET_W(cbyte, ti); | |
1449 | rrp->port= GET_W(cbyte, ti); | |
1450 | return adns_s_ok; | |
1451 | } | |
1452 | ||
1453 | static adns_status pa_srvraw(const parseinfo *pai, int cbyte, | |
1454 | int max, void *datap) { | |
1455 | adns_rr_srvraw *rrp= datap; | |
1456 | adns_status st; | |
1457 | ||
05fc6b3a | 1458 | st= pap_srv_begin(pai,&cbyte,max,datap); |
401c256a | 1459 | if (st) return st; |
1460 | ||
1461 | st= pap_domain(pai, &cbyte, max, &rrp->host, | |
1462 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1463 | if (st) return st; | |
1464 | ||
1465 | if (cbyte != max) return adns_s_invaliddata; | |
1466 | return adns_s_ok; | |
1467 | } | |
1468 | ||
1469 | static adns_status pa_srvha(const parseinfo *pai, int cbyte, | |
1470 | int max, void *datap) { | |
1471 | adns_rr_srvha *rrp= datap; | |
1472 | adns_status st; | |
1473 | ||
05fc6b3a | 1474 | st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st; |
401c256a | 1475 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st; |
1476 | if (cbyte != max) return adns_s_invaliddata; | |
1477 | return adns_s_ok; | |
1478 | } | |
1479 | ||
1480 | static void mf_srvraw(adns_query qu, void *datap) { | |
1481 | adns_rr_srvraw *rrp= datap; | |
1482 | adns__makefinal_str(qu, &rrp->host); | |
1483 | } | |
1484 | ||
1485 | static void mf_srvha(adns_query qu, void *datap) { | |
1486 | adns_rr_srvha *rrp= datap; | |
1487 | mfp_hostaddr(qu,&rrp->ha); | |
1488 | } | |
1489 | ||
1490 | static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) { | |
1491 | const adns_rr_srvraw *ap= datap_a, *bp= datap_b; | |
1492 | /* might be const adns_rr_svhostaddr* */ | |
1493 | ||
1494 | if (ap->priority < bp->priority) return 0; | |
1495 | if (ap->priority > bp->priority) return 1; | |
1496 | return 0; | |
1497 | } | |
1498 | ||
0e45654b | 1499 | static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp |
1500 | /* might be adns_rr_srvraw* */) { | |
401c256a | 1501 | char buf[30]; |
1502 | sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port); | |
1503 | CSP_ADDSTR(buf); | |
1504 | return adns_s_ok; | |
1505 | } | |
1506 | ||
1507 | static adns_status cs_srvraw(vbuf *vb, const void *datap) { | |
1508 | const adns_rr_srvraw *rrp= datap; | |
1509 | adns_status st; | |
1510 | ||
0e45654b | 1511 | st= csp_srv_begin(vb,(const void*)rrp); if (st) return st; |
401c256a | 1512 | return csp_domain(vb,rrp->host); |
1513 | } | |
1514 | ||
1515 | static adns_status cs_srvha(vbuf *vb, const void *datap) { | |
1516 | const adns_rr_srvha *rrp= datap; | |
1517 | adns_status st; | |
1518 | ||
0e45654b | 1519 | st= csp_srv_begin(vb,(const void*)datap); if (st) return st; |
401c256a | 1520 | return csp_hostaddr(vb,&rrp->ha); |
1521 | } | |
1522 | ||
042b0909 | 1523 | static void postsort_srv(adns_state ads, void *array, int nrrs,int rrsz, |
d24e2a7e | 1524 | const struct typeinfo *typei) { |
0e45654b | 1525 | /* we treat everything in the array as if it were an adns_rr_srvha |
1526 | * even though the array might be of adns_rr_srvraw. That's OK | |
1527 | * because they have the same prefix, which is all we access. | |
042b0909 | 1528 | * We use rrsz, too, rather than naive array indexing, of course. |
0e45654b | 1529 | */ |
1530 | char *workbegin, *workend, *search, *arrayend; | |
1531 | const adns_rr_srvha *rr; | |
1532 | union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp; | |
1533 | int cpriority, totalweight, runtotal; | |
1534 | long randval; | |
1535 | ||
042b0909 MW |
1536 | assert(rrsz <= sizeof(rrtmp)); |
1537 | for (workbegin= array, arrayend= workbegin + rrsz * nrrs; | |
0e45654b | 1538 | workbegin < arrayend; |
1539 | workbegin= workend) { | |
1540 | cpriority= (rr=(void*)workbegin)->priority; | |
1541 | ||
1542 | for (workend= workbegin, totalweight= 0; | |
1543 | workend < arrayend && (rr=(void*)workend)->priority == cpriority; | |
042b0909 | 1544 | workend += rrsz) { |
0e45654b | 1545 | totalweight += rr->weight; |
0e45654b | 1546 | } |
1547 | ||
1548 | /* Now workbegin..(workend-1) incl. are exactly all of the RRs of | |
1549 | * cpriority. From now on, workbegin points to the `remaining' | |
1550 | * records: we select one record at a time (RFC2782 `Usage rules' | |
1551 | * and `Format of the SRV RR' subsection `Weight') to place at | |
1552 | * workbegin (swapping with the one that was there, and then | |
1553 | * advance workbegin. */ | |
1554 | for (; | |
042b0909 MW |
1555 | workbegin + rrsz < workend; /* don't bother if just one */ |
1556 | workbegin += rrsz) { | |
0e45654b | 1557 | |
1558 | randval= nrand48(ads->rand48xsubi); | |
1559 | randval %= (totalweight + 1); | |
0e45654b | 1560 | /* makes it into 0..totalweight inclusive; with 2^10 RRs, |
1561 | * totalweight must be <= 2^26 so probability nonuniformity is | |
1562 | * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie | |
1563 | * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5). | |
1564 | */ | |
1565 | ||
1566 | for (search=workbegin, runtotal=0; | |
1567 | (runtotal += (rr=(void*)search)->weight) < randval; | |
042b0909 | 1568 | search += rrsz); |
0e45654b | 1569 | assert(search < arrayend); |
1570 | totalweight -= rr->weight; | |
1571 | if (search != workbegin) { | |
042b0909 MW |
1572 | memcpy(&rrtmp, workbegin, rrsz); |
1573 | memcpy(workbegin, search, rrsz); | |
1574 | memcpy(search, &rrtmp, rrsz); | |
0e45654b | 1575 | } |
1576 | } | |
1577 | } | |
d24e2a7e | 1578 | /* tests: |
1579 | * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk. | |
1580 | * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk. | |
1581 | * ./adnshost_s -t srv- _jabber._tcp.jabber.org | |
1582 | */ | |
1583 | } | |
1584 | ||
d19b03d0 | 1585 | /* |
2c6eb096 | 1586 | * _byteblock (mf) |
1587 | */ | |
1588 | ||
1589 | static void mf_byteblock(adns_query qu, void *datap) { | |
1590 | adns_rr_byteblock *rrp= datap; | |
1591 | void *bytes= rrp->data; | |
1592 | adns__makefinal_block(qu,&bytes,rrp->len); | |
1593 | rrp->data= bytes; | |
1594 | } | |
1595 | ||
1596 | /* | |
1597 | * _opaque (pa,cs) | |
1598 | */ | |
1599 | ||
1600 | static adns_status pa_opaque(const parseinfo *pai, int cbyte, | |
1601 | int max, void *datap) { | |
1602 | adns_rr_byteblock *rrp= datap; | |
1603 | ||
1604 | rrp->len= max - cbyte; | |
1605 | rrp->data= adns__alloc_interim(pai->qu, rrp->len); | |
1606 | if (!rrp->data) R_NOMEM; | |
1607 | memcpy(rrp->data, pai->dgram + cbyte, rrp->len); | |
1608 | return adns_s_ok; | |
1609 | } | |
1610 | ||
1611 | static adns_status cs_opaque(vbuf *vb, const void *datap) { | |
1612 | const adns_rr_byteblock *rrp= datap; | |
1613 | char buf[10]; | |
1614 | int l; | |
1615 | unsigned char *p; | |
1616 | ||
1617 | sprintf(buf,"\\# %d",rrp->len); | |
1618 | CSP_ADDSTR(buf); | |
1619 | ||
1620 | for (l= rrp->len, p= rrp->data; | |
1621 | l>=4; | |
1622 | l -= 4, p += 4) { | |
1623 | sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]); | |
1624 | CSP_ADDSTR(buf); | |
1625 | } | |
1626 | for (; | |
1627 | l>0; | |
1628 | l--, p++) { | |
1629 | sprintf(buf," %02x",*p); | |
1630 | CSP_ADDSTR(buf); | |
1631 | } | |
1632 | return adns_s_ok; | |
1633 | } | |
1634 | ||
1635 | /* | |
eb81d633 | 1636 | * _flat (mf) |
1637 | */ | |
1638 | ||
ffbda80c | 1639 | static void mf_flat(adns_query qu, void *data) { } |
1640 | ||
eb81d633 | 1641 | /* |
1642 | * Now the table. | |
1643 | */ | |
1644 | ||
e062dcae | 1645 | #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member)) |
86e7b8d9 | 1646 | |
c5fd1fbb | 1647 | #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \ |
d24b603f | 1648 | { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_##memb, \ |
c5fd1fbb | 1649 | GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \ |
a586770a MW |
1650 | adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \ |
1651 | CDR(__VA_ARGS__) } | |
c5fd1fbb | 1652 | #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \ |
d24b603f | 1653 | { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_flat, \ |
c5fd1fbb | 1654 | GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \ |
a586770a MW |
1655 | adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \ |
1656 | CDR(__VA_ARGS__) } | |
c5fd1fbb MW |
1657 | |
1658 | #define di_0 0 | |
98a3f706 | 1659 | |
1660 | static const typeinfo typeinfos[] = { | |
eb81d633 | 1661 | /* Must be in ascending order of rrtype ! */ |
609133ee | 1662 | /* mem-mgmt code rrt fmt member parser comparer printer */ |
1663 | ||
c5fd1fbb MW |
1664 | FLAT_TYPE(a, "A", 0, inaddr, inaddr, inaddr,inaddr ), |
1665 | DEEP_TYPE(ns_raw, "NS", "raw",str, host_raw,0, domain ), | |
1666 | DEEP_TYPE(cname, "CNAME", 0, str, dom_raw, 0, domain ), | |
1667 | DEEP_TYPE(soa_raw,"SOA", "raw",soa, soa, 0, soa ), | |
1668 | DEEP_TYPE(ptr_raw,"PTR", "raw",str, host_raw,0, domain ), | |
1669 | DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,hinfo, 0, hinfo ), | |
1670 | DEEP_TYPE(mx_raw, "MX", "raw",intstr, mx_raw, mx_raw,inthost ), | |
1671 | DEEP_TYPE(txt, "TXT", 0, manyistr, txt, 0, txt ), | |
1672 | DEEP_TYPE(rp_raw, "RP", "raw",strpair, rp, 0, rp ), | |
eeee7503 | 1673 | FLAT_TYPE(aaaa, "AAAA", 0, in6addr, in6addr, in6addr,in6addr ), |
c5fd1fbb | 1674 | DEEP_TYPE(srv_raw,"SRV", "raw",srvraw , srvraw, srv, srvraw, |
e8e5aeac | 1675 | .checklabel= ckl_srv, .postsort= postsort_srv), |
c5fd1fbb | 1676 | |
b0a32b17 | 1677 | FLAT_TYPE(addr, "A", "addr", addr, addr, addr, addr, |
92c8ebba | 1678 | .getrrsz= gsz_addr, .query_send= qs_addr), |
c5fd1fbb | 1679 | DEEP_TYPE(ns, "NS", "+addr",hostaddr, hostaddr,hostaddr,hostaddr ), |
938b0228 MW |
1680 | DEEP_TYPE(ptr, "PTR","checked",str, ptr, 0, domain, |
1681 | .checklabel= ckl_ptr), | |
c5fd1fbb MW |
1682 | DEEP_TYPE(mx, "MX", "+addr",inthostaddr,mx, mx, inthostaddr, ), |
1683 | DEEP_TYPE(srv, "SRV","+addr",srvha, srvha, srv, srvha, | |
e8e5aeac | 1684 | .checklabel= ckl_srv, .postsort= postsort_srv), |
c5fd1fbb MW |
1685 | |
1686 | DEEP_TYPE(soa, "SOA","822", soa, soa, 0, soa ), | |
1687 | DEEP_TYPE(rp, "RP", "822", strpair, rp, 0, rp ), | |
98a3f706 | 1688 | }; |
1689 | ||
92c8ebba MW |
1690 | static const typeinfo tinfo_addrsub = |
1691 | FLAT_TYPE(none, "<addr>","sub",addr, addr, 0, addr, | |
1692 | .getrrsz= gsz_addr); | |
1693 | ||
2c6eb096 | 1694 | static const typeinfo typeinfo_unknown= |
c5fd1fbb | 1695 | DEEP_TYPE(unknown,0, "unknown",byteblock,opaque, 0, opaque ); |
2c6eb096 | 1696 | |
f759e52e | 1697 | const typeinfo *adns__findtype(adns_rrtype type) { |
1698 | const typeinfo *begin, *end, *mid; | |
98a3f706 | 1699 | |
2c6eb096 | 1700 | if (type & adns_r_unknown) return &typeinfo_unknown; |
d24b603f | 1701 | type &= adns_rrt_reprmask; |
2c6eb096 | 1702 | |
98a3f706 | 1703 | begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo)); |
1704 | ||
1705 | while (begin < end) { | |
1706 | mid= begin + ((end-begin)>>1); | |
2c6eb096 | 1707 | if (mid->typekey == type) return mid; |
1708 | if (type > mid->typekey) begin= mid+1; | |
98a3f706 | 1709 | else end= mid; |
1710 | } | |
1711 | return 0; | |
1712 | } |