Commit | Line | Data |
---|---|---|
98db6da3 | 1 | /* |
2 | * types.c | |
3 | * - RR-type-specific code, and the machinery to call it | |
4 | */ | |
5 | /* | |
39f45e7e | 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.) | |
98db6da3 | 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 | */ | |
5c596e4d | 26 | |
5f8085b7 | 27 | #include <stddef.h> |
d4c7b0b1 | 28 | #include <stdlib.h> |
29 | ||
b6b3ac61 | 30 | #include <sys/types.h> |
763d28b9 | 31 | #include <sys/socket.h> |
32 | #include <netinet/in.h> | |
1e9efa71 | 33 | #include <arpa/inet.h> |
5f8085b7 | 34 | #include <netdb.h> |
1e9efa71 | 35 | |
5c596e4d | 36 | #include "internal.h" |
37 | ||
9c344a42 | 38 | #define R_NOMEM return adns_s_nomemory |
39 | #define CSP_ADDSTR(s) do { \ | |
40 | if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; \ | |
41 | } while (0) | |
26eb6bdc | 42 | |
14180727 | 43 | /* |
44 | * order of sections: | |
45 | * | |
61093792 | 46 | * _string (pap) |
14180727 | 47 | * _textdata, _qstring (csp) |
48 | * _str (mf,cs) | |
61093792 | 49 | * _intstr (mf,csp,cs) |
14180727 | 50 | * _manyistr (mf,cs) |
51 | * _txt (pa) | |
9136cf0c MW |
52 | * _inaddr (pa,cs,di, +search_sortlist, dip_genaddr) |
53 | * _in6addr (pa,cs,di) | |
e1d31292 | 54 | * _addr (pap,pa,di,csp,cs,gsz,qs, +search_sortlist_sa, |
bcfd6f13 | 55 | * dip_sockaddr, rrtypes) |
14180727 | 56 | * _domain (pap) |
57 | * _host_raw (pa) | |
58 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs) | |
59 | * _mx_raw (pa,di) | |
60 | * _mx (pa,di) | |
61 | * _inthostaddr (mf,cs) | |
cd1bde2f | 62 | * _ptr (pa) |
61093792 | 63 | * _strpair (mf,cs) |
64 | * _intstrpair (mf,cs) | |
65 | * _hinfo (pa) | |
c2875680 | 66 | * _mailbox (pap +pap_mailbox822) |
61093792 | 67 | * _rp (pa) |
68 | * _soa (pa,mf,cs) | |
3540caec | 69 | * _srv* (ckl,(pap),pa,mf,di,(csp),cs,postsort) |
7d0aaee4 | 70 | * _byteblock (mf) |
71 | * _opaque (pa,cs) | |
14180727 | 72 | * _flat (mf) |
73 | * | |
74 | * within each section: | |
3540caec | 75 | * ckl_* |
14180727 | 76 | * pap_* |
77 | * pa_* | |
78 | * dip_* | |
79 | * di_* | |
80 | * mfp_* | |
81 | * mf_* | |
82 | * csp_* | |
83 | * cs_* | |
59d05d1c | 84 | * postsort_* |
14180727 | 85 | */ |
86 | ||
87 | /* | |
0872e289 | 88 | * _qstring (pap,csp) |
14180727 | 89 | */ |
90 | ||
0872e289 | 91 | static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max, |
61093792 | 92 | int *len_r, char **str_r) { |
93 | /* Neither len_r nor str_r may be null. | |
94 | * End of datagram (overrun) is indicated by returning adns_s_invaliddata; | |
95 | */ | |
96 | const byte *dgram= pai->dgram; | |
97 | int l, cbyte; | |
98 | char *str; | |
99 | ||
100 | cbyte= *cbyte_io; | |
101 | ||
102 | if (cbyte >= max) return adns_s_invaliddata; | |
103 | GET_B(cbyte,l); | |
104 | if (cbyte+l > max) return adns_s_invaliddata; | |
105 | ||
106 | str= adns__alloc_interim(pai->qu, l+1); | |
107 | if (!str) R_NOMEM; | |
108 | ||
109 | str[l]= 0; | |
110 | memcpy(str,dgram+cbyte,l); | |
111 | ||
112 | *len_r= l; | |
113 | *str_r= str; | |
114 | *cbyte_io= cbyte+l; | |
115 | ||
116 | return adns_s_ok; | |
117 | } | |
118 | ||
0872e289 | 119 | static adns_status csp_qstring(vbuf *vb, const char *dp, int len) { |
14180727 | 120 | unsigned char ch; |
121 | char buf[10]; | |
122 | int cn; | |
123 | ||
124 | CSP_ADDSTR("\""); | |
125 | for (cn=0; cn<len; cn++) { | |
126 | ch= *dp++; | |
0872e289 | 127 | if (ch == '\\') { |
61093792 | 128 | CSP_ADDSTR("\\\\"); |
0872e289 | 129 | } else if (ch == '"') { |
130 | CSP_ADDSTR("\\\""); | |
131 | } else if (ch >= 32 && ch <= 126) { | |
132 | if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM; | |
14180727 | 133 | } else { |
61093792 | 134 | sprintf(buf,"\\x%02x",ch); |
14180727 | 135 | CSP_ADDSTR(buf); |
136 | } | |
137 | } | |
138 | CSP_ADDSTR("\""); | |
139 | ||
140 | return adns_s_ok; | |
141 | } | |
142 | ||
14180727 | 143 | /* |
0872e289 | 144 | * _str (mf) |
14180727 | 145 | */ |
146 | ||
147 | static void mf_str(adns_query qu, void *datap) { | |
148 | char **rrp= datap; | |
149 | ||
150 | adns__makefinal_str(qu,rrp); | |
151 | } | |
152 | ||
14180727 | 153 | /* |
0872e289 | 154 | * _intstr (mf) |
14180727 | 155 | */ |
156 | ||
157 | static void mf_intstr(adns_query qu, void *datap) { | |
158 | adns_rr_intstr *rrp= datap; | |
159 | ||
160 | adns__makefinal_str(qu,&rrp->str); | |
161 | } | |
162 | ||
14180727 | 163 | /* |
0872e289 | 164 | * _manyistr (mf) |
14180727 | 165 | */ |
166 | ||
167 | static void mf_manyistr(adns_query qu, void *datap) { | |
168 | adns_rr_intstr **rrp= datap; | |
169 | adns_rr_intstr *te, *table; | |
170 | void *tablev; | |
171 | int tc; | |
172 | ||
173 | for (tc=0, te= *rrp; te->i >= 0; te++, tc++); | |
174 | tablev= *rrp; | |
175 | adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1)); | |
176 | *rrp= table= tablev; | |
177 | for (te= *rrp; te->i >= 0; te++) | |
178 | adns__makefinal_str(qu,&te->str); | |
179 | } | |
180 | ||
14180727 | 181 | /* |
0872e289 | 182 | * _txt (pa,cs) |
14180727 | 183 | */ |
184 | ||
9c344a42 | 185 | static adns_status pa_txt(const parseinfo *pai, int cbyte, |
186 | int max, void *datap) { | |
14180727 | 187 | adns_rr_intstr **rrp= datap, *table, *te; |
188 | const byte *dgram= pai->dgram; | |
189 | int ti, tc, l, startbyte; | |
61093792 | 190 | adns_status st; |
14180727 | 191 | |
192 | startbyte= cbyte; | |
193 | if (cbyte >= max) return adns_s_invaliddata; | |
194 | tc= 0; | |
195 | while (cbyte < max) { | |
196 | GET_B(cbyte,l); | |
197 | cbyte+= l; | |
61093792 | 198 | tc++; |
14180727 | 199 | } |
0872e289 | 200 | if (cbyte != max || !tc) return adns_s_invaliddata; |
14180727 | 201 | |
202 | table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1)); | |
203 | if (!table) R_NOMEM; | |
204 | ||
205 | for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) { | |
0872e289 | 206 | st= pap_qstring(pai, &cbyte, max, &te->i, &te->str); |
61093792 | 207 | if (st) return st; |
14180727 | 208 | } |
209 | assert(cbyte == max); | |
210 | ||
211 | te->i= -1; | |
212 | te->str= 0; | |
213 | ||
214 | *rrp= table; | |
215 | return adns_s_ok; | |
cd363ffd | 216 | } |
217 | ||
0872e289 | 218 | static adns_status cs_txt(vbuf *vb, const void *datap) { |
219 | const adns_rr_intstr *const *rrp= datap; | |
220 | const adns_rr_intstr *current; | |
221 | adns_status st; | |
222 | int spc; | |
223 | ||
224 | for (current= *rrp, spc=0; current->i >= 0; current++, spc=1) { | |
225 | if (spc) CSP_ADDSTR(" "); | |
226 | st= csp_qstring(vb,current->str,current->i); if (st) return st; | |
227 | } | |
228 | return adns_s_ok; | |
229 | } | |
230 | ||
231 | /* | |
232 | * _hinfo (cs) | |
233 | */ | |
234 | ||
235 | static adns_status cs_hinfo(vbuf *vb, const void *datap) { | |
236 | const adns_rr_intstrpair *rrp= datap; | |
237 | adns_status st; | |
238 | ||
239 | st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i); if (st) return st; | |
240 | CSP_ADDSTR(" "); | |
241 | st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i); if (st) return st; | |
242 | return adns_s_ok; | |
243 | } | |
244 | ||
14180727 | 245 | /* |
9136cf0c | 246 | * _inaddr (pa,di,cs +search_sortlist, dip_genaddr) |
14180727 | 247 | */ |
248 | ||
9c344a42 | 249 | static adns_status pa_inaddr(const parseinfo *pai, int cbyte, |
250 | int max, void *datap) { | |
f2ad23ee | 251 | struct in_addr *storeto= datap; |
68b7fc5f | 252 | |
253 | if (max-cbyte != 4) return adns_s_invaliddata; | |
26eb6bdc | 254 | memcpy(storeto, pai->dgram + cbyte, 4); |
68b7fc5f | 255 | return adns_s_ok; |
256 | } | |
257 | ||
9136cf0c | 258 | static int search_sortlist(adns_state ads, int af, const void *ad) { |
8c3aa944 | 259 | const struct sortlist *slp; |
4e8966f3 MW |
260 | const struct in6_addr *a6; |
261 | union gen_addr a; | |
8c3aa944 | 262 | int i; |
4e8966f3 MW |
263 | int v6mappedp = 0; |
264 | ||
265 | if (af == AF_INET6) { | |
266 | a6 = ad; | |
267 | if (IN6_IS_ADDR_V4MAPPED(a6)) { | |
268 | a.v4.s_addr = htonl(((unsigned long)a6->s6_addr[12] << 24) | | |
269 | ((unsigned long)a6->s6_addr[13] << 16) | | |
270 | ((unsigned long)a6->s6_addr[14] << 8) | | |
271 | ((unsigned long)a6->s6_addr[15] << 0)); | |
272 | v6mappedp = 1; | |
273 | } | |
274 | } | |
275 | ||
8c3aa944 | 276 | for (i=0, slp=ads->sortlist; |
4e8966f3 | 277 | i<ads->nsortlist && |
6480e2df MW |
278 | !adns__addr_match_p(af,ad, slp->af,&slp->base,&slp->mask) && |
279 | !(v6mappedp && | |
280 | adns__addr_match_p(AF_INET,&a, slp->af,&slp->base,&slp->mask)); | |
8c3aa944 | 281 | i++, slp++); |
282 | return i; | |
14180727 | 283 | } |
284 | ||
9136cf0c | 285 | static int dip_genaddr(adns_state ads, int af, const void *a, const void *b) { |
8c3aa944 | 286 | int ai, bi; |
287 | ||
288 | if (!ads->nsortlist) return 0; | |
289 | ||
9136cf0c MW |
290 | ai= search_sortlist(ads,af,a); |
291 | bi= search_sortlist(ads,af,b); | |
8c3aa944 | 292 | return bi<ai; |
293 | } | |
294 | ||
9c344a42 | 295 | static int di_inaddr(adns_state ads, |
296 | const void *datap_a, const void *datap_b) { | |
9136cf0c | 297 | return dip_genaddr(ads,AF_INET,datap_a,datap_b); |
f2ad23ee | 298 | } |
299 | ||
300 | static adns_status cs_inaddr(vbuf *vb, const void *datap) { | |
301 | const struct in_addr *rrp= datap, rr= *rrp; | |
1e9efa71 | 302 | const char *ia; |
303 | ||
f2ad23ee | 304 | ia= inet_ntoa(rr); assert(ia); |
26eb6bdc | 305 | CSP_ADDSTR(ia); |
306 | return adns_s_ok; | |
1e9efa71 | 307 | } |
68b7fc5f | 308 | |
14180727 | 309 | /* |
9136cf0c MW |
310 | * _in6addr (pa,di,cs) |
311 | */ | |
312 | ||
313 | static adns_status pa_in6addr(const parseinfo *pai, int cbyte, | |
314 | int max, void *datap) { | |
315 | struct in6_addr *storeto= datap; | |
316 | ||
317 | if (max-cbyte != 16) return adns_s_invaliddata; | |
318 | memcpy(storeto->s6_addr, pai->dgram + cbyte, 16); | |
319 | return adns_s_ok; | |
320 | } | |
321 | ||
322 | static int di_in6addr(adns_state ads, | |
323 | const void *datap_a, const void *datap_b) { | |
5f8085b7 | 324 | return dip_genaddr(ads,AF_INET6,datap_a,datap_b); |
9136cf0c MW |
325 | } |
326 | ||
327 | static adns_status cs_in6addr(vbuf *vb, const void *datap) { | |
328 | char buf[INET6_ADDRSTRLEN]; | |
329 | const char *ia; | |
330 | ||
331 | ia= inet_ntop(AF_INET6, datap, buf, sizeof(buf)); assert(ia); | |
332 | CSP_ADDSTR(ia); | |
333 | return adns_s_ok; | |
334 | } | |
335 | ||
336 | /* | |
e1d31292 MW |
337 | * _addr (pap,pa,di,csp,cs,gsz,qs, +search_sortlist_sa, dip_sockaddr, |
338 | * addr_rrtypes) | |
14180727 | 339 | */ |
340 | ||
0b5062df MW |
341 | static const typeinfo tinfo_addrsub; |
342 | ||
27af7cd3 MW |
343 | #define ADDR_RRTYPES(_) _(a) _(aaaa) |
344 | ||
345 | static const adns_rrtype addr_all_rrtypes[] = { | |
346 | #define RRTY_CODE(ty) adns_r_##ty, | |
347 | ADDR_RRTYPES(RRTY_CODE) | |
348 | #undef RRTY_CODE | |
349 | }; | |
350 | ||
351 | enum { | |
352 | #define RRTY_INDEX(ty) addr__ri_##ty, | |
353 | ADDR_RRTYPES(RRTY_INDEX) | |
354 | #undef RRTY_INDEX | |
355 | addr_nrrtypes, | |
356 | #define RRTY_FLAG(ty) addr_rf_##ty = 1 << addr__ri_##ty, | |
357 | ADDR_RRTYPES(RRTY_FLAG) | |
358 | addr__rrty_hunoz | |
359 | #undef RRTY_FLAG | |
360 | }; | |
361 | ||
362 | static unsigned addr_rrtypeflag(adns_rrtype type) | |
363 | { | |
364 | int i; | |
365 | ||
366 | type &= adns_rrt_typemask; | |
367 | for (i = 0; i < addr_nrrtypes && type != addr_all_rrtypes[i]; i++); | |
368 | assert(i < addr_nrrtypes); | |
369 | return 1 << i; | |
370 | } | |
371 | ||
0aa4a357 MW |
372 | /* About CNAME handling in addr queries. |
373 | * | |
374 | * A user-level addr query is translated into a number of protocol-level | |
375 | * queries, and its job is to reassemble the results. This gets tricky if | |
376 | * the answers aren't consistent. In particular, if the answers report | |
377 | * inconsistent indirection via CNAME records (e.g., different CNAMEs, or | |
378 | * some indirect via a CNAME, and some don't) then we have trouble. | |
379 | * | |
380 | * Once we've received an answer, even if it was NODATA, we set | |
381 | * adns__qf_addr_answer on the parent query. This will let us detect a | |
382 | * conflict between a no-CNAME-with-NODATA reply and a subsequent CNAME. | |
383 | * | |
384 | * If we detect a conflict of any kind, then at least one answer came back | |
385 | * with a CNAME record, so we pick the first such answer (somewhat | |
386 | * arbitrarily) as being the `right' canonical name, and set this in the | |
387 | * parent query's answer->cname slot. We discard address records from the | |
388 | * wrong name. And finally we cancel the outstanding child queries, and | |
389 | * resubmit address queries for the address families we don't yet have, with | |
390 | * adns__qf_addr_cname set so that we know that we're in the fixup state. | |
391 | */ | |
392 | ||
5f8085b7 MW |
393 | static adns_status pap_addr(const parseinfo *pai, int rrty, size_t rrsz, |
394 | int *cbyte_io, int max, adns_rr_addr *storeto) | |
395 | { | |
26eb6bdc | 396 | const byte *dgram= pai->dgram; |
5f8085b7 MW |
397 | int af, addrlen, salen; |
398 | struct in6_addr v6map; | |
399 | const void *oaddr = dgram + *cbyte_io; | |
400 | int avail = max - *cbyte_io; | |
401 | int step = -1; | |
402 | void *addrp = 0; | |
403 | ||
404 | switch (rrty) { | |
405 | case adns_r_a: | |
bcfd6f13 | 406 | if (pai->qu->flags & adns_qf_domapv4) { |
5f8085b7 MW |
407 | if (avail < 4) return adns_s_invaliddata; |
408 | memset(v6map.s6_addr + 0, 0x00, 10); | |
409 | memset(v6map.s6_addr + 10, 0xff, 2); | |
410 | memcpy(v6map.s6_addr + 12, oaddr, 4); | |
411 | oaddr = v6map.s6_addr; avail = sizeof(v6map.s6_addr); | |
412 | if (step < 0) step = 4; | |
413 | goto aaaa; | |
414 | } | |
415 | af = AF_INET; addrlen = 4; | |
416 | addrp = &storeto->addr.inet.sin_addr; | |
417 | salen = sizeof(storeto->addr.inet); | |
418 | break; | |
419 | case adns_r_aaaa: | |
420 | aaaa: | |
421 | af = AF_INET6; addrlen = 16; | |
422 | addrp = storeto->addr.inet6.sin6_addr.s6_addr; | |
423 | salen = sizeof(storeto->addr.inet6); | |
424 | break; | |
425 | } | |
426 | assert(addrp); | |
427 | ||
428 | assert(offsetof(adns_rr_addr, addr) + salen <= rrsz); | |
429 | if (addrlen < avail) return adns_s_invaliddata; | |
430 | if (step < 0) step = addrlen; | |
431 | *cbyte_io += step; | |
432 | memset(&storeto->addr, 0, salen); | |
433 | storeto->len = salen; | |
434 | storeto->addr.sa.sa_family = af; | |
435 | memcpy(addrp, oaddr, addrlen); | |
a1d2d0ed | 436 | |
5f8085b7 MW |
437 | return adns_s_ok; |
438 | } | |
439 | ||
440 | static adns_status pa_addr(const parseinfo *pai, int cbyte, | |
441 | int max, void *datap) { | |
442 | int err = pap_addr(pai, pai->qu->answer->type & adns_rrt_typemask, | |
443 | pai->qu->answer->rrsz, &cbyte, max, datap); | |
444 | if (err) return err; | |
445 | if (cbyte != max) return adns_s_invaliddata; | |
cd363ffd | 446 | return adns_s_ok; |
447 | } | |
448 | ||
9136cf0c MW |
449 | static int search_sortlist_sa(adns_state ads, const struct sockaddr *sa) |
450 | { | |
6480e2df | 451 | return search_sortlist(ads, sa->sa_family, adns__sockaddr_to_inaddr(sa)); |
9136cf0c MW |
452 | } |
453 | ||
454 | static int dip_sockaddr(adns_state ads, | |
455 | const struct sockaddr *sa, | |
456 | const struct sockaddr *sb) | |
457 | { | |
458 | if (!ads->sortlist) return 0; | |
459 | return search_sortlist_sa(ads, sa) > search_sortlist_sa(ads, sb); | |
460 | } | |
461 | ||
8c3aa944 | 462 | static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) { |
bc01473e | 463 | const adns_rr_addr *ap= datap_a, *bp= datap_b; |
cd363ffd | 464 | |
9136cf0c | 465 | return dip_sockaddr(ads, &ap->addr.sa, &bp->addr.sa); |
cd363ffd | 466 | } |
467 | ||
8c3aa944 | 468 | static int div_addr(void *context, const void *datap_a, const void *datap_b) { |
469 | const adns_state ads= context; | |
470 | ||
471 | return di_addr(ads, datap_a, datap_b); | |
472 | } | |
473 | ||
bc01473e | 474 | static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) { |
5f8085b7 MW |
475 | char buf[128]; |
476 | int err; | |
cd363ffd | 477 | |
478 | switch (rrp->addr.inet.sin_family) { | |
479 | case AF_INET: | |
0872e289 | 480 | CSP_ADDSTR("INET "); |
5f8085b7 MW |
481 | goto ntop; |
482 | case AF_INET6: | |
483 | CSP_ADDSTR("INET6 "); | |
484 | goto ntop; | |
485 | ntop: | |
486 | err= getnameinfo(&rrp->addr.sa, rrp->len, buf, sizeof(buf), 0, 0, | |
487 | NI_NUMERICHOST); assert(!err); | |
488 | CSP_ADDSTR(buf); | |
cd363ffd | 489 | break; |
490 | default: | |
491 | sprintf(buf,"AF=%u",rrp->addr.sa.sa_family); | |
26eb6bdc | 492 | CSP_ADDSTR(buf); |
cd363ffd | 493 | break; |
494 | } | |
495 | return adns_s_ok; | |
496 | } | |
497 | ||
26eb6bdc | 498 | static adns_status cs_addr(vbuf *vb, const void *datap) { |
bc01473e | 499 | const adns_rr_addr *rrp= datap; |
26eb6bdc | 500 | |
501 | return csp_addr(vb,rrp); | |
502 | } | |
503 | ||
27af7cd3 MW |
504 | static unsigned addr_rrtypes(adns_state ads, adns_rrtype type, |
505 | adns_queryflags qf) | |
5f8085b7 | 506 | { |
20078efc | 507 | adns_queryflags permitaf = 0, hackaf = 0; |
27af7cd3 | 508 | unsigned want = 0; |
5f8085b7 | 509 | |
e1d31292 MW |
510 | if (!(qf & (adns_qf_ipv4_only | adns_qf_ipv6_only))) |
511 | qf |= adns_qf_ipv4_only | adns_qf_ipv6_only; | |
bcfd6f13 MW |
512 | if (!(type & adns__qtf_bigaddr) || !(type & adns__qtf_manyaf)) |
513 | qf = (qf & adns__qf_afmask) | adns_qf_ipv4_only; | |
20078efc MW |
514 | else if (ads->iflags & adns_if_afmask) { |
515 | if (ads->iflags & adns_if_af_v4only) { | |
516 | permitaf |= adns_qf_ipv4_only; | |
517 | hackaf |= adns_qf_domapv4; | |
518 | } | |
519 | if (ads->iflags & adns_if_af_v6only) | |
520 | permitaf |= adns_qf_ipv6_only; | |
521 | if (qf & permitaf) | |
522 | qf &= hackaf | permitaf | ~adns__qf_afmask; | |
523 | } | |
524 | ||
27af7cd3 MW |
525 | if (qf & adns_qf_ipv4_only) want |= addr_rf_a; |
526 | if (qf & adns_qf_ipv6_only) want |= addr_rf_aaaa; | |
5f8085b7 | 527 | |
27af7cd3 | 528 | return want; |
5f8085b7 MW |
529 | } |
530 | ||
e1d31292 | 531 | static int gsz_addr(adns_rrtype type) |
5f8085b7 | 532 | { |
e1d31292 | 533 | return type & adns__qtf_bigaddr ? |
5f8085b7 MW |
534 | sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only); |
535 | } | |
536 | ||
4678dd22 | 537 | static adns_status append_addrs(adns_query qu, adns_query from, size_t rrsz, |
bcfd6f13 MW |
538 | adns_rr_addr **dp, int *dlen, |
539 | const adns_rr_addr *sp, int slen) | |
540 | { | |
541 | size_t drrsz = *dlen*rrsz, srrsz = slen*rrsz; | |
1bcabfa3 MW |
542 | byte *p; |
543 | ||
fb35fb37 | 544 | if (!slen) return adns_s_ok; |
1bcabfa3 | 545 | p = adns__alloc_interim(qu, drrsz + srrsz); |
bcfd6f13 MW |
546 | if (!p) R_NOMEM; |
547 | if (*dlen) { | |
548 | memcpy(p, *dp, drrsz); | |
549 | adns__free_interim(qu, *dp); | |
550 | } | |
551 | memcpy(p + drrsz, sp, srrsz); | |
552 | *dlen += slen; | |
553 | *dp = (adns_rr_addr *)p; | |
4678dd22 | 554 | if (from && qu->expires > from->expires) qu->expires = from->expires; |
bcfd6f13 MW |
555 | return adns_s_ok; |
556 | } | |
557 | ||
96818a13 | 558 | static void icb_addr(adns_query parent, adns_query child); |
5f8085b7 | 559 | |
bcfd6f13 | 560 | static void addr_subqueries(adns_query qu, struct timeval now, |
27af7cd3 | 561 | adns_queryflags qf_extra, |
88518143 | 562 | const byte *qd_dgram, int qd_dglen) |
5f8085b7 | 563 | { |
bcfd6f13 | 564 | int i, err, id; |
5f8085b7 | 565 | adns_query cqu; |
27af7cd3 MW |
566 | adns_queryflags qf = (qu->flags & ~adns_qf_search) | qf_extra; |
567 | adns_rrtype qtf = qu->answer->type & adns__qtf_deref; | |
568 | unsigned which = qu->ctx.tinfo.addr.want & ~qu->ctx.tinfo.addr.have; | |
5f8085b7 MW |
569 | qcontext ctx; |
570 | ||
5f8085b7 MW |
571 | memset(&ctx, 0, sizeof(ctx)); |
572 | ctx.callback = icb_addr; | |
27af7cd3 MW |
573 | for (i = 0; i < addr_nrrtypes; i++) { |
574 | if (!(which & (1 << i))) continue; | |
88518143 | 575 | err = adns__mkquery_frdgram(qu->ads, &qu->vb, &id, qd_dgram, qd_dglen, |
27af7cd3 | 576 | DNS_HDRSIZE, addr_all_rrtypes[i], qf); |
5f8085b7 | 577 | if (err) goto x_error; |
0b5062df | 578 | err = adns__internal_submit(qu->ads, &cqu, &tinfo_addrsub, |
27af7cd3 | 579 | addr_all_rrtypes[i] | qtf, |
5f8085b7 MW |
580 | &qu->vb, id, qf, now, &ctx); |
581 | if (err) goto x_error; | |
582 | cqu->answer->rrsz = qu->answer->rrsz; | |
583 | cqu->parent = qu; | |
584 | LIST_LINK_TAIL_PART(qu->children, cqu,siblings.); | |
585 | } | |
bcfd6f13 MW |
586 | qu->state = query_childw; |
587 | LIST_LINK_TAIL(qu->ads->childw, qu); | |
5f8085b7 MW |
588 | return; |
589 | ||
590 | x_error: | |
591 | adns__query_fail(qu, err); | |
592 | } | |
593 | ||
bcfd6f13 | 594 | static adns_status addr_submit(adns_query parent, adns_query *query_r, |
27af7cd3 | 595 | vbuf *qumsg_vb, int id, unsigned want, |
bcfd6f13 | 596 | adns_queryflags flags, struct timeval now, |
27af7cd3 | 597 | qcontext *ctx) |
bcfd6f13 MW |
598 | { |
599 | /* This is effectively a substitute for adns__internal_submit, intended for | |
600 | * the case where the caller (possibly) only wants a subset of the | |
601 | * available record types. The memory management and callback rules are | |
602 | * the same as for adns__internal_submit. | |
603 | * | |
604 | * Some differences: the query is linked onto the parent's children list | |
605 | * before exit (though the parent's state is not changed, and it is not | |
27af7cd3 MW |
606 | * linked into the childw list queue); and we fiddle with the `tinfo' |
607 | * portion of the context structure (yes, modifying *ctx), since this is, | |
608 | * in fact, the main purpose of this function. | |
bcfd6f13 MW |
609 | */ |
610 | ||
611 | adns_state ads = parent->ads; | |
88518143 | 612 | adns_query qu; |
bcfd6f13 MW |
613 | adns_status err; |
614 | adns_rrtype type = | |
615 | (adns_r_addr & adns_rrt_reprmask) | | |
616 | (parent->answer->type & ~adns_rrt_reprmask); | |
617 | ||
27af7cd3 MW |
618 | ctx->tinfo.addr.want = want; |
619 | ctx->tinfo.addr.have = 0; | |
88518143 | 620 | err = adns__internal_submit(ads, &qu, adns__findtype(adns_r_addr), |
27af7cd3 | 621 | type, qumsg_vb, id, flags, now, ctx); |
bcfd6f13 MW |
622 | if (err) return err; |
623 | ||
88518143 MW |
624 | qu->parent = parent; |
625 | LIST_LINK_TAIL_PART(parent->children, qu, siblings.); | |
88518143 | 626 | *query_r = qu; |
bcfd6f13 MW |
627 | return adns_s_ok; |
628 | } | |
629 | ||
96818a13 MW |
630 | static adns_status copy_cname_from_child(adns_query parent, adns_query child) |
631 | { | |
632 | adns_answer *pans = parent->answer, *cans = child->answer; | |
633 | size_t n = strlen(cans->cname) + 1; | |
634 | ||
635 | pans->cname = adns__alloc_preserved(parent, n); | |
636 | if (!pans->cname) R_NOMEM; | |
637 | memcpy(pans->cname, cans->cname, n); | |
638 | return adns_s_ok; | |
639 | } | |
640 | ||
88518143 | 641 | static void done_addr_type(adns_query qu, adns_rrtype type) |
27af7cd3 | 642 | { qu->ctx.tinfo.addr.have |= addr_rrtypeflag(type); } |
88518143 | 643 | |
96818a13 MW |
644 | static void icb_addr(adns_query parent, adns_query child) |
645 | { | |
646 | adns_state ads = parent->ads; | |
647 | adns_answer *pans = parent->answer, *cans = child->answer; | |
70d1b1b5 | 648 | struct timeval now; |
96818a13 | 649 | adns_status err; |
88518143 | 650 | int id; |
96818a13 MW |
651 | |
652 | if (!(child->flags & adns__qf_addr_cname) && | |
653 | (parent->flags & adns__qf_addr_answer) && | |
68fb0393 MW |
654 | (!!pans->cname != !!cans->cname || |
655 | (pans->cname && strcmp(pans->cname, cans->cname) != 0))) { | |
96818a13 MW |
656 | /* We've detected an inconsistency in CNAME records, and must deploy |
657 | * countermeasures. | |
658 | */ | |
659 | ||
660 | if (!pans->cname) { | |
661 | /* The child has a CNAME record, but the parent doesn't. We must | |
662 | * discard all of the parent's addresses, and substitute the child's. | |
663 | */ | |
664 | ||
665 | assert(pans->rrsz == cans->rrsz); | |
666 | adns__free_interim(parent, pans->rrs.bytes); | |
667 | adns__transfer_interim(child, parent, cans->rrs.bytes); | |
668 | pans->rrs.bytes = cans->rrs.bytes; | |
669 | pans->nrrs = cans->nrrs; | |
27af7cd3 | 670 | parent->ctx.tinfo.addr.have = 0; |
88518143 | 671 | done_addr_type(parent, cans->type); |
96818a13 MW |
672 | err = copy_cname_from_child(parent, child); if (err) goto x_err; |
673 | } | |
674 | ||
675 | /* We've settled on the CNAME (now) associated with the parent, which | |
676 | * already has appropriate address records. Build a query datagram for | |
677 | * this name so that we can issue child queries for the missing address | |
678 | * families. The child's vbuf looks handy for this. | |
679 | */ | |
680 | err = adns__mkquery(ads, &child->vb, &id, pans->cname, | |
27af7cd3 | 681 | strlen(pans->cname), &tinfo_addrsub, |
96818a13 MW |
682 | adns_r_addr, parent->flags); |
683 | if (err) goto x_err; | |
684 | ||
96818a13 MW |
685 | /* Now cancel the remaining children, and try again with the CNAME we've |
686 | * settled on. | |
687 | */ | |
688 | adns__cancel_children(parent); | |
70d1b1b5 | 689 | if (gettimeofday(&now, 0)) goto x_gtod; |
27af7cd3 MW |
690 | addr_subqueries(parent, now, adns__qf_addr_cname, |
691 | child->vb.buf, child->vb.used); | |
96818a13 MW |
692 | return; |
693 | } | |
694 | ||
695 | if (cans->cname && !pans->cname) { | |
696 | err = copy_cname_from_child(parent, child); | |
697 | if (err) goto x_err; | |
698 | } | |
699 | ||
700 | if ((parent->flags & adns_qf_search) && | |
701 | !pans->cname && cans->status == adns_s_nxdomain) { | |
702 | /* We're searching a list of suffixes, this is the first answer, and it | |
703 | * tells us that the name doesn't exist. Try the next one. | |
704 | */ | |
705 | ||
706 | if (parent->expires > child->expires) parent->expires = child->expires; | |
707 | adns__cancel_children(parent); | |
708 | adns__free_interim(parent, pans->rrs.bytes); | |
709 | pans->rrs.bytes = 0; pans->nrrs = 0; | |
70d1b1b5 MW |
710 | if (gettimeofday(&now, 0)) goto x_gtod; |
711 | adns__search_next(ads, parent, now); | |
96818a13 MW |
712 | return; |
713 | } | |
714 | ||
715 | if (cans->status && cans->status != adns_s_nodata) | |
716 | { err = cans->status; goto x_err; } | |
717 | ||
718 | assert(pans->rrsz == cans->rrsz); | |
719 | err = append_addrs(parent, child, pans->rrsz, | |
720 | &pans->rrs.addr, &pans->nrrs, | |
721 | cans->rrs.addr, cans->nrrs); | |
722 | if (err) goto x_err; | |
88518143 | 723 | done_addr_type(parent, cans->type); |
96818a13 MW |
724 | |
725 | if (parent->children.head) LIST_LINK_TAIL(ads->childw, parent); | |
726 | else if (!pans->nrrs) adns__query_fail(parent, adns_s_nodata); | |
727 | else adns__query_done(parent); | |
728 | parent->flags |= adns__qf_addr_answer; | |
729 | return; | |
730 | ||
70d1b1b5 MW |
731 | x_gtod: |
732 | adns__diag(ads, -1, parent, "gettimeofday failed: %s", strerror(errno)); | |
733 | err = adns_s_systemfail; | |
734 | goto x_err; | |
735 | ||
96818a13 MW |
736 | x_err: |
737 | adns__query_fail(parent, err); | |
738 | } | |
739 | ||
bcfd6f13 MW |
740 | static void qs_addr(adns_query qu, struct timeval now) |
741 | { | |
27af7cd3 MW |
742 | if (!qu->ctx.tinfo.addr.want) { |
743 | qu->ctx.tinfo.addr.want = | |
744 | addr_rrtypes(qu->ads, qu->answer->type, qu->flags); | |
745 | qu->ctx.tinfo.addr.have = 0; | |
746 | } | |
747 | addr_subqueries(qu, now, 0, qu->query_dgram, qu->query_dglen); | |
bcfd6f13 MW |
748 | } |
749 | ||
14180727 | 750 | /* |
0872e289 | 751 | * _domain (pap,csp,cs) |
752 | * _dom_raw (pa) | |
14180727 | 753 | */ |
754 | ||
26eb6bdc | 755 | static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max, |
756 | char **domain_r, parsedomain_flags flags) { | |
f2ad23ee | 757 | adns_status st; |
758 | char *dm; | |
759 | ||
26eb6bdc | 760 | st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags, |
761 | pai->dgram,pai->dglen, cbyte_io, max); | |
f2ad23ee | 762 | if (st) return st; |
26eb6bdc | 763 | if (!pai->qu->vb.used) return adns_s_invaliddata; |
f2ad23ee | 764 | |
26eb6bdc | 765 | dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1); |
766 | if (!dm) R_NOMEM; | |
f2ad23ee | 767 | |
26eb6bdc | 768 | dm[pai->qu->vb.used]= 0; |
769 | memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used); | |
f2ad23ee | 770 | |
771 | *domain_r= dm; | |
772 | return adns_s_ok; | |
773 | } | |
774 | ||
0872e289 | 775 | static adns_status csp_domain(vbuf *vb, const char *domain) { |
776 | CSP_ADDSTR(domain); | |
777 | if (!*domain) CSP_ADDSTR("."); | |
778 | return adns_s_ok; | |
779 | } | |
780 | ||
781 | static adns_status cs_domain(vbuf *vb, const void *datap) { | |
782 | const char *const *domainp= datap; | |
783 | return csp_domain(vb,*domainp); | |
784 | } | |
785 | ||
9c344a42 | 786 | static adns_status pa_dom_raw(const parseinfo *pai, int cbyte, |
787 | int max, void *datap) { | |
0872e289 | 788 | char **rrp= datap; |
789 | adns_status st; | |
790 | ||
791 | st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok); | |
792 | if (st) return st; | |
793 | ||
794 | if (cbyte != max) return adns_s_invaliddata; | |
795 | return adns_s_ok; | |
796 | } | |
797 | ||
14180727 | 798 | /* |
799 | * _host_raw (pa) | |
800 | */ | |
801 | ||
9c344a42 | 802 | static adns_status pa_host_raw(const parseinfo *pai, int cbyte, |
803 | int max, void *datap) { | |
f2ad23ee | 804 | char **rrp= datap; |
cfdca685 | 805 | adns_status st; |
1e9efa71 | 806 | |
26eb6bdc | 807 | st= pap_domain(pai, &cbyte, max, rrp, |
808 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
f2ad23ee | 809 | if (st) return st; |
810 | ||
811 | if (cbyte != max) return adns_s_invaliddata; | |
812 | return adns_s_ok; | |
813 | } | |
cfdca685 | 814 | |
14180727 | 815 | /* |
bc01473e | 816 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs) |
14180727 | 817 | */ |
a1d2d0ed | 818 | |
26eb6bdc | 819 | static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha, |
27af7cd3 MW |
820 | unsigned *want_io, size_t addrsz, |
821 | int *cbyte_io, int count, int dmstart) { | |
822 | int rri, naddrs; | |
823 | unsigned typef, want = *want_io; | |
5f8085b7 | 824 | int type, class, rdlen, rdend, rdstart, ownermatched; |
2c7b101b | 825 | unsigned long ttl; |
26eb6bdc | 826 | adns_status st; |
a1d2d0ed | 827 | |
bcfd6f13 | 828 | for (rri=0, naddrs=0; rri<count; rri++) { |
9c344a42 | 829 | st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram, |
830 | pai->dglen, cbyte_io, | |
2c7b101b | 831 | &type, &class, &ttl, &rdlen, &rdstart, |
26eb6bdc | 832 | pai->dgram, pai->dglen, dmstart, &ownermatched); |
a1d2d0ed | 833 | if (st) return st; |
bcfd6f13 | 834 | if (!ownermatched || class != DNS_CLASS_IN) continue; |
27af7cd3 MW |
835 | typef = addr_rrtypeflag(type); |
836 | if (!(want & typef)) continue; | |
837 | want &= ~typef; | |
bcfd6f13 | 838 | if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*addrsz)) R_NOMEM; |
2c7b101b | 839 | adns__update_expires(pai->qu,ttl,pai->now); |
5f8085b7 MW |
840 | rdend = rdstart + rdlen; |
841 | st= pap_addr(pai, type, addrsz, &rdstart, rdend, | |
842 | (adns_rr_addr *)(pai->qu->vb.buf + naddrs*addrsz)); | |
a1d2d0ed | 843 | if (st) return st; |
5f8085b7 | 844 | if (rdstart != rdend) return adns_s_invaliddata; |
26eb6bdc | 845 | naddrs++; |
a1d2d0ed | 846 | } |
bcfd6f13 | 847 | if (naddrs > 0) { |
4678dd22 | 848 | st = append_addrs(pai->qu, 0, addrsz, &ha->addrs, &ha->naddrs, |
bcfd6f13 MW |
849 | (const adns_rr_addr *)pai->qu->vb.buf, naddrs); |
850 | if (st) return st; | |
a1d2d0ed | 851 | ha->astatus= adns_s_ok; |
26eb6bdc | 852 | |
27af7cd3 | 853 | if (!want) { |
bcfd6f13 MW |
854 | adns__isort(ha->addrs, naddrs, addrsz, pai->qu->vb.buf, |
855 | div_addr, pai->ads); | |
856 | } | |
a1d2d0ed | 857 | } |
27af7cd3 | 858 | *want_io = want; |
a1d2d0ed | 859 | return adns_s_ok; |
860 | } | |
861 | ||
bc01473e | 862 | static void icb_hostaddr(adns_query parent, adns_query child) { |
bc01473e | 863 | adns_answer *cans= child->answer; |
334c6111 | 864 | adns_rr_hostaddr *rrp= child->ctx.pinfo.hostaddr; |
cb32030b | 865 | adns_state ads= parent->ads; |
0872e289 | 866 | adns_status st; |
e1d31292 | 867 | size_t addrsz = gsz_addr(parent->answer->type); |
bc01473e | 868 | |
bcfd6f13 | 869 | st= cans->status == adns_s_nodata ? adns_s_ok : cans->status; |
bcfd6f13 MW |
870 | |
871 | if (st) goto done; | |
872 | assert(addrsz == cans->rrsz); | |
4678dd22 | 873 | st = append_addrs(parent, child, addrsz, |
bcfd6f13 MW |
874 | &rrp->addrs, &rrp->naddrs, |
875 | cans->rrs.addr, cans->nrrs); | |
876 | if (st) goto done; | |
877 | if (!rrp->naddrs) { st = adns_s_nodata; goto done; } | |
878 | ||
879 | if (!adns__vbuf_ensure(&parent->vb, addrsz)) | |
880 | { st = adns_s_nomemory; goto done; } | |
881 | adns__isort(rrp->addrs, rrp->naddrs, addrsz, parent->vb.buf, | |
882 | div_addr, ads); | |
883 | ||
884 | done: | |
885 | if (st) { | |
886 | adns__free_interim(parent, rrp->addrs); | |
1dc15819 | 887 | rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : 0; |
bcfd6f13 | 888 | } |
cd1bde2f | 889 | |
1dc15819 | 890 | rrp->astatus= st; |
cb32030b | 891 | if (parent->children.head) { |
892 | LIST_LINK_TAIL(ads->childw,parent); | |
893 | } else { | |
894 | adns__query_done(parent); | |
895 | } | |
bc01473e | 896 | } |
897 | ||
26eb6bdc | 898 | static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io, |
899 | int max, adns_rr_hostaddr *rrp) { | |
a1d2d0ed | 900 | adns_status st; |
901 | int dmstart, cbyte; | |
ba1ddf08 | 902 | qcontext ctx; |
903 | int id; | |
904 | adns_query nqu; | |
59fbb06a | 905 | adns_queryflags nflags; |
27af7cd3 | 906 | unsigned want; |
e1d31292 | 907 | size_t addrsz = gsz_addr(pai->qu->answer->type); |
a1d2d0ed | 908 | |
909 | dmstart= cbyte= *cbyte_io; | |
26eb6bdc | 910 | st= pap_domain(pai, &cbyte, max, &rrp->host, |
911 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
a1d2d0ed | 912 | if (st) return st; |
913 | *cbyte_io= cbyte; | |
914 | ||
915 | rrp->astatus= adns_s_ok; | |
bcfd6f13 | 916 | rrp->naddrs= 0; |
a1d2d0ed | 917 | rrp->addrs= 0; |
918 | ||
26eb6bdc | 919 | cbyte= pai->nsstart; |
a1d2d0ed | 920 | |
27af7cd3 | 921 | want = addr_rrtypes(pai->ads, pai->qu->answer->type, pai->qu->flags); |
bcfd6f13 | 922 | |
27af7cd3 | 923 | st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->nscount, dmstart); |
a1d2d0ed | 924 | if (st) return st; |
27af7cd3 | 925 | if (!want) return adns_s_ok; |
a1d2d0ed | 926 | |
27af7cd3 | 927 | st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->arcount, dmstart); |
a1d2d0ed | 928 | if (st) return st; |
27af7cd3 | 929 | if (!want) return adns_s_ok; |
26eb6bdc | 930 | |
ba1ddf08 | 931 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
932 | pai->dgram, pai->dglen, dmstart, | |
933 | adns_r_addr, adns_qf_quoteok_query); | |
934 | if (st) return st; | |
bc01473e | 935 | |
cd1bde2f | 936 | ctx.ext= 0; |
937 | ctx.callback= icb_hostaddr; | |
334c6111 | 938 | ctx.pinfo.hostaddr= rrp; |
59fbb06a | 939 | |
bcfd6f13 | 940 | nflags= adns_qf_quoteok_query | (pai->qu->flags & adns__qf_afmask); |
59fbb06a | 941 | if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid; |
942 | ||
27af7cd3 | 943 | st= addr_submit(pai->qu, &nqu, &pai->qu->vb, id, want, |
bcfd6f13 | 944 | nflags, pai->now, &ctx); |
ba1ddf08 | 945 | if (st) return st; |
946 | ||
26eb6bdc | 947 | return adns_s_ok; |
a1d2d0ed | 948 | } |
949 | ||
9c344a42 | 950 | static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, |
951 | int max, void *datap) { | |
26eb6bdc | 952 | adns_rr_hostaddr *rrp= datap; |
a1d2d0ed | 953 | adns_status st; |
a1d2d0ed | 954 | |
26eb6bdc | 955 | st= pap_hostaddr(pai, &cbyte, max, rrp); |
a1d2d0ed | 956 | if (st) return st; |
957 | if (cbyte != max) return adns_s_invaliddata; | |
958 | ||
26eb6bdc | 959 | return adns_s_ok; |
960 | } | |
a1d2d0ed | 961 | |
9c344a42 | 962 | static int dip_hostaddr(adns_state ads, |
963 | const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) { | |
26eb6bdc | 964 | if (ap->astatus != bp->astatus) return ap->astatus; |
965 | if (ap->astatus) return 0; | |
a1d2d0ed | 966 | |
9136cf0c | 967 | return dip_sockaddr(ads, &ap->addrs[0].addr.sa, &bp->addrs[0].addr.sa); |
26eb6bdc | 968 | } |
969 | ||
9c344a42 | 970 | static int di_hostaddr(adns_state ads, |
971 | const void *datap_a, const void *datap_b) { | |
26eb6bdc | 972 | const adns_rr_hostaddr *ap= datap_a, *bp= datap_b; |
973 | ||
8c3aa944 | 974 | return dip_hostaddr(ads, ap,bp); |
a1d2d0ed | 975 | } |
976 | ||
14180727 | 977 | static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) { |
978 | void *tablev; | |
5f8085b7 MW |
979 | size_t sz = qu->answer->type & adns__qtf_bigaddr ? |
980 | sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only); | |
14180727 | 981 | adns__makefinal_str(qu,&rrp->host); |
982 | tablev= rrp->addrs; | |
5f8085b7 | 983 | adns__makefinal_block(qu, &tablev, rrp->naddrs*sz); |
14180727 | 984 | rrp->addrs= tablev; |
f2ad23ee | 985 | } |
986 | ||
14180727 | 987 | static void mf_hostaddr(adns_query qu, void *datap) { |
988 | adns_rr_hostaddr *rrp= datap; | |
f2ad23ee | 989 | |
14180727 | 990 | mfp_hostaddr(qu,rrp); |
f2ad23ee | 991 | } |
992 | ||
26eb6bdc | 993 | static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) { |
0fb18816 | 994 | const char *errstr; |
26eb6bdc | 995 | adns_status st; |
9e50e3ac | 996 | char buf[20]; |
26eb6bdc | 997 | int i; |
998 | ||
0fb18816 | 999 | st= csp_domain(vb,rrp->host); if (st) return st; |
26eb6bdc | 1000 | |
0872e289 | 1001 | CSP_ADDSTR(" "); |
9e50e3ac | 1002 | CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus)); |
1003 | ||
1004 | sprintf(buf," %d ",rrp->astatus); | |
1005 | CSP_ADDSTR(buf); | |
0fb18816 | 1006 | |
9e50e3ac | 1007 | CSP_ADDSTR(adns_errabbrev(rrp->astatus)); |
0fb18816 | 1008 | CSP_ADDSTR(" "); |
9e50e3ac | 1009 | |
0fb18816 | 1010 | errstr= adns_strerror(rrp->astatus); |
1011 | st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st; | |
0872e289 | 1012 | |
1013 | if (rrp->naddrs >= 0) { | |
1014 | CSP_ADDSTR(" ("); | |
1015 | for (i=0; i<rrp->naddrs; i++) { | |
1016 | CSP_ADDSTR(" "); | |
26eb6bdc | 1017 | st= csp_addr(vb,&rrp->addrs[i]); |
1018 | } | |
0872e289 | 1019 | CSP_ADDSTR(" )"); |
1020 | } else { | |
1021 | CSP_ADDSTR(" ?"); | |
26eb6bdc | 1022 | } |
1023 | return adns_s_ok; | |
1024 | } | |
1025 | ||
1026 | static adns_status cs_hostaddr(vbuf *vb, const void *datap) { | |
1027 | const adns_rr_hostaddr *rrp= datap; | |
1028 | ||
1029 | return csp_hostaddr(vb,rrp); | |
1030 | } | |
1031 | ||
14180727 | 1032 | /* |
1033 | * _mx_raw (pa,di) | |
1034 | */ | |
26eb6bdc | 1035 | |
9c344a42 | 1036 | static adns_status pa_mx_raw(const parseinfo *pai, int cbyte, |
1037 | int max, void *datap) { | |
14180727 | 1038 | const byte *dgram= pai->dgram; |
1039 | adns_rr_intstr *rrp= datap; | |
1040 | adns_status st; | |
1041 | int pref; | |
26eb6bdc | 1042 | |
14180727 | 1043 | if (cbyte+2 > max) return adns_s_invaliddata; |
1044 | GET_W(cbyte,pref); | |
1045 | rrp->i= pref; | |
1046 | st= pap_domain(pai, &cbyte, max, &rrp->str, | |
1047 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1048 | if (st) return st; | |
26eb6bdc | 1049 | |
14180727 | 1050 | if (cbyte != max) return adns_s_invaliddata; |
1051 | return adns_s_ok; | |
1052 | } | |
26eb6bdc | 1053 | |
8c3aa944 | 1054 | static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) { |
14180727 | 1055 | const adns_rr_intstr *ap= datap_a, *bp= datap_b; |
1056 | ||
1057 | if (ap->i < bp->i) return 0; | |
1058 | if (ap->i > bp->i) return 1; | |
1059 | return 0; | |
26eb6bdc | 1060 | } |
1061 | ||
14180727 | 1062 | /* |
1063 | * _mx (pa,di) | |
1064 | */ | |
26eb6bdc | 1065 | |
9c344a42 | 1066 | static adns_status pa_mx(const parseinfo *pai, int cbyte, |
1067 | int max, void *datap) { | |
14180727 | 1068 | const byte *dgram= pai->dgram; |
1069 | adns_rr_inthostaddr *rrp= datap; | |
1070 | adns_status st; | |
1071 | int pref; | |
1072 | ||
1073 | if (cbyte+2 > max) return adns_s_invaliddata; | |
1074 | GET_W(cbyte,pref); | |
1075 | rrp->i= pref; | |
1076 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); | |
1077 | if (st) return st; | |
1078 | ||
1079 | if (cbyte != max) return adns_s_invaliddata; | |
1080 | return adns_s_ok; | |
1081 | } | |
1082 | ||
8c3aa944 | 1083 | static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) { |
14180727 | 1084 | const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b; |
1085 | ||
1086 | if (ap->i < bp->i) return 0; | |
1087 | if (ap->i > bp->i) return 1; | |
8c3aa944 | 1088 | return dip_hostaddr(ads, &ap->ha, &bp->ha); |
26eb6bdc | 1089 | } |
1090 | ||
14180727 | 1091 | /* |
1092 | * _inthostaddr (mf,cs) | |
1093 | */ | |
1094 | ||
26eb6bdc | 1095 | static void mf_inthostaddr(adns_query qu, void *datap) { |
1096 | adns_rr_inthostaddr *rrp= datap; | |
1097 | ||
1098 | mfp_hostaddr(qu,&rrp->ha); | |
1099 | } | |
1100 | ||
14180727 | 1101 | static adns_status cs_inthostaddr(vbuf *vb, const void *datap) { |
1102 | const adns_rr_inthostaddr *rrp= datap; | |
1103 | char buf[10]; | |
f2ad23ee | 1104 | |
14180727 | 1105 | sprintf(buf,"%u ",rrp->i); |
1106 | CSP_ADDSTR(buf); | |
1107 | ||
1108 | return csp_hostaddr(vb,&rrp->ha); | |
cfdca685 | 1109 | } |
1110 | ||
14180727 | 1111 | /* |
0872e289 | 1112 | * _inthost (cs) |
1113 | */ | |
1114 | ||
1115 | static adns_status cs_inthost(vbuf *vb, const void *datap) { | |
1116 | const adns_rr_intstr *rrp= datap; | |
1117 | char buf[10]; | |
1118 | ||
1119 | sprintf(buf,"%u ",rrp->i); | |
1120 | CSP_ADDSTR(buf); | |
1121 | return csp_domain(vb,rrp->str); | |
1122 | } | |
1123 | ||
1124 | /* | |
cd1bde2f | 1125 | * _ptr (pa, +icb_ptr) |
1126 | */ | |
1127 | ||
1128 | static void icb_ptr(adns_query parent, adns_query child) { | |
1129 | adns_answer *cans= child->answer; | |
8a53cf7f MW |
1130 | const union gen_addr *queried; |
1131 | const unsigned char *found; | |
cb32030b | 1132 | adns_state ads= parent->ads; |
cd1bde2f | 1133 | int i; |
1134 | ||
1135 | if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) { | |
1136 | adns__query_fail(parent,adns_s_inconsistent); | |
1137 | return; | |
1138 | } else if (cans->status) { | |
1139 | adns__query_fail(parent,cans->status); | |
1140 | return; | |
1141 | } | |
1142 | ||
e4007092 | 1143 | queried= &parent->ctx.tinfo.ptr.addr.addr; |
8a53cf7f MW |
1144 | for (i=0, found=cans->rrs.bytes; i<cans->nrrs; i++, found += cans->rrsz) { |
1145 | if (!memcmp(queried,found,cans->rrsz)) { | |
cb32030b | 1146 | if (!parent->children.head) { |
1147 | adns__query_done(parent); | |
1148 | return; | |
1149 | } else { | |
1150 | LIST_LINK_TAIL(ads->childw,parent); | |
1151 | return; | |
1152 | } | |
cd1bde2f | 1153 | } |
1154 | } | |
1155 | ||
1156 | adns__query_fail(parent,adns_s_inconsistent); | |
1157 | } | |
1158 | ||
e4007092 MW |
1159 | static adns_status ckl_ptr(adns_state ads, adns_queryflags flags, |
1160 | union checklabel_state *css, qcontext *ctx, | |
1161 | int labnum, const char *label, int lablen) | |
1162 | { | |
e4007092 | 1163 | if (lablen) { |
6480e2df MW |
1164 | if (adns__revparse_label(&css->ptr, labnum, label,lablen)) |
1165 | return adns_s_querydomainwrong; | |
e4007092 | 1166 | } else { |
6480e2df MW |
1167 | if (adns__revparse_done(&css->ptr, labnum, |
1168 | &ctx->tinfo.ptr.rev_rrtype, | |
1169 | &ctx->tinfo.ptr.addr)) | |
1170 | return adns_s_querydomainwrong; | |
e4007092 | 1171 | } |
e4007092 MW |
1172 | return adns_s_ok; |
1173 | } | |
1174 | ||
9c344a42 | 1175 | static adns_status pa_ptr(const parseinfo *pai, int dmstart, |
1176 | int max, void *datap) { | |
cd1bde2f | 1177 | char **rrp= datap; |
1178 | adns_status st; | |
6480e2df | 1179 | adns_rrtype rrtype = pai->qu->ctx.tinfo.ptr.rev_rrtype; |
e4007092 | 1180 | int cbyte, id; |
cd1bde2f | 1181 | adns_query nqu; |
1182 | qcontext ctx; | |
1183 | ||
1184 | cbyte= dmstart; | |
1185 | st= pap_domain(pai, &cbyte, max, rrp, | |
1186 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1187 | if (st) return st; | |
1188 | if (cbyte != max) return adns_s_invaliddata; | |
1189 | ||
cd1bde2f | 1190 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
1191 | pai->dgram, pai->dglen, dmstart, | |
6480e2df | 1192 | rrtype, adns_qf_quoteok_query); |
cd1bde2f | 1193 | if (st) return st; |
1194 | ||
1195 | ctx.ext= 0; | |
1196 | ctx.callback= icb_ptr; | |
334c6111 MW |
1197 | memset(&ctx.pinfo,0,sizeof(ctx.pinfo)); |
1198 | memset(&ctx.tinfo,0,sizeof(ctx.tinfo)); | |
6480e2df MW |
1199 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(rrtype), |
1200 | rrtype, &pai->qu->vb, id, | |
7e6a84a1 | 1201 | adns_qf_quoteok_query, pai->now, &ctx); |
cd1bde2f | 1202 | if (st) return st; |
1203 | ||
1204 | nqu->parent= pai->qu; | |
1205 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); | |
cd1bde2f | 1206 | return adns_s_ok; |
1207 | } | |
1208 | ||
1209 | /* | |
0872e289 | 1210 | * _strpair (mf) |
61093792 | 1211 | */ |
1212 | ||
1213 | static void mf_strpair(adns_query qu, void *datap) { | |
1214 | adns_rr_strpair *rrp= datap; | |
1215 | ||
1216 | adns__makefinal_str(qu,&rrp->array[0]); | |
1217 | adns__makefinal_str(qu,&rrp->array[1]); | |
1218 | } | |
1219 | ||
61093792 | 1220 | /* |
0872e289 | 1221 | * _intstrpair (mf) |
61093792 | 1222 | */ |
1223 | ||
1224 | static void mf_intstrpair(adns_query qu, void *datap) { | |
1225 | adns_rr_intstrpair *rrp= datap; | |
1226 | ||
1227 | adns__makefinal_str(qu,&rrp->array[0].str); | |
1228 | adns__makefinal_str(qu,&rrp->array[1].str); | |
1229 | } | |
1230 | ||
61093792 | 1231 | /* |
1232 | * _hinfo (pa) | |
1233 | */ | |
1234 | ||
9c344a42 | 1235 | static adns_status pa_hinfo(const parseinfo *pai, int cbyte, |
1236 | int max, void *datap) { | |
61093792 | 1237 | adns_rr_intstrpair *rrp= datap; |
1238 | adns_status st; | |
1239 | int i; | |
1240 | ||
1241 | for (i=0; i<2; i++) { | |
0872e289 | 1242 | st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str); |
61093792 | 1243 | if (st) return st; |
1244 | } | |
1245 | ||
1246 | if (cbyte != max) return adns_s_invaliddata; | |
1247 | ||
1248 | return adns_s_ok; | |
1249 | } | |
1250 | ||
1251 | /* | |
0872e289 | 1252 | * _mailbox (pap,cs) |
61093792 | 1253 | */ |
1254 | ||
9c344a42 | 1255 | static adns_status pap_mailbox822(const parseinfo *pai, |
1256 | int *cbyte_io, int max, char **mb_r) { | |
6f2c243f | 1257 | int lablen, labstart, i, needquote, c, r, neednorm; |
1258 | const unsigned char *p; | |
1259 | char *str; | |
1260 | findlabel_state fls; | |
1261 | adns_status st; | |
1262 | vbuf *vb; | |
1263 | ||
1264 | vb= &pai->qu->vb; | |
1265 | vb->used= 0; | |
1266 | adns__findlabel_start(&fls, pai->ads, | |
1267 | -1, pai->qu, | |
1268 | pai->dgram, pai->dglen, max, | |
1269 | *cbyte_io, cbyte_io); | |
1270 | st= adns__findlabel_next(&fls,&lablen,&labstart); | |
1271 | if (!lablen) { | |
0872e289 | 1272 | adns__vbuf_appendstr(vb,"."); |
6f2c243f | 1273 | goto x_ok; |
1274 | } | |
1275 | ||
1276 | neednorm= 1; | |
1277 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) { | |
1278 | c= *p++; | |
1279 | if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata; | |
1280 | if (c == '.' && !neednorm) neednorm= 1; | |
67ca39c8 | 1281 | else if (c==' ' || c>=127 || ctype_822special(c)) needquote++; |
6f2c243f | 1282 | else neednorm= 0; |
1283 | } | |
1284 | ||
1285 | if (needquote || neednorm) { | |
1286 | r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM; | |
1287 | adns__vbuf_appendq(vb,"\"",1); | |
1288 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) { | |
1289 | c= *p; | |
0872e289 | 1290 | if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1); |
6f2c243f | 1291 | adns__vbuf_appendq(vb,p,1); |
1292 | } | |
1293 | adns__vbuf_appendq(vb,"\"",1); | |
1294 | } else { | |
1295 | r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM; | |
1296 | } | |
1297 | ||
1298 | r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM; | |
1299 | ||
1300 | st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram); | |
1301 | if (st) return st; | |
1302 | ||
1303 | x_ok: | |
1304 | str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM; | |
1305 | memcpy(str,vb->buf,vb->used); | |
1306 | str[vb->used]= 0; | |
1307 | *mb_r= str; | |
1308 | return adns_s_ok; | |
61093792 | 1309 | } |
1310 | ||
c2875680 | 1311 | static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max, |
1312 | char **mb_r) { | |
7d0aaee4 | 1313 | if (pai->qu->typei->typekey & adns__qtf_mail822) { |
c2875680 | 1314 | return pap_mailbox822(pai, cbyte_io, max, mb_r); |
1315 | } else { | |
0872e289 | 1316 | return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok); |
c2875680 | 1317 | } |
1318 | } | |
1319 | ||
0872e289 | 1320 | static adns_status csp_mailbox(vbuf *vb, const char *mailbox) { |
1321 | return csp_domain(vb,mailbox); | |
1322 | } | |
1323 | ||
61093792 | 1324 | /* |
0872e289 | 1325 | * _rp (pa,cs) |
61093792 | 1326 | */ |
1327 | ||
9c344a42 | 1328 | static adns_status pa_rp(const parseinfo *pai, int cbyte, |
1329 | int max, void *datap) { | |
61093792 | 1330 | adns_rr_strpair *rrp= datap; |
1331 | adns_status st; | |
1332 | ||
1333 | st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]); | |
1334 | if (st) return st; | |
1335 | ||
1336 | st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok); | |
1337 | if (st) return st; | |
1338 | ||
1339 | if (cbyte != max) return adns_s_invaliddata; | |
1340 | return adns_s_ok; | |
1341 | } | |
1342 | ||
0872e289 | 1343 | static adns_status cs_rp(vbuf *vb, const void *datap) { |
1344 | const adns_rr_strpair *rrp= datap; | |
1345 | adns_status st; | |
1346 | ||
1347 | st= csp_mailbox(vb,rrp->array[0]); if (st) return st; | |
1348 | CSP_ADDSTR(" "); | |
1349 | st= csp_domain(vb,rrp->array[1]); if (st) return st; | |
1350 | ||
1351 | return adns_s_ok; | |
1352 | } | |
1353 | ||
61093792 | 1354 | /* |
1355 | * _soa (pa,mf,cs) | |
1356 | */ | |
1357 | ||
9c344a42 | 1358 | static adns_status pa_soa(const parseinfo *pai, int cbyte, |
1359 | int max, void *datap) { | |
61093792 | 1360 | adns_rr_soa *rrp= datap; |
1361 | const byte *dgram= pai->dgram; | |
1362 | adns_status st; | |
1363 | int msw, lsw, i; | |
1364 | ||
1365 | st= pap_domain(pai, &cbyte, max, &rrp->mname, | |
1366 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1367 | if (st) return st; | |
1368 | ||
1369 | st= pap_mailbox(pai, &cbyte, max, &rrp->rname); | |
1370 | if (st) return st; | |
1371 | ||
1372 | if (cbyte+20 != max) return adns_s_invaliddata; | |
1373 | ||
1374 | for (i=0; i<5; i++) { | |
1375 | GET_W(cbyte,msw); | |
1376 | GET_W(cbyte,lsw); | |
1377 | (&rrp->serial)[i]= (msw<<16) | lsw; | |
1378 | } | |
1379 | ||
1380 | return adns_s_ok; | |
1381 | } | |
1382 | ||
1383 | static void mf_soa(adns_query qu, void *datap) { | |
1384 | adns_rr_soa *rrp= datap; | |
1385 | ||
1386 | adns__makefinal_str(qu,&rrp->mname); | |
1387 | adns__makefinal_str(qu,&rrp->rname); | |
1388 | } | |
1389 | ||
1390 | static adns_status cs_soa(vbuf *vb, const void *datap) { | |
1391 | const adns_rr_soa *rrp= datap; | |
1392 | char buf[20]; | |
1393 | int i; | |
1394 | adns_status st; | |
1395 | ||
0872e289 | 1396 | st= csp_domain(vb,rrp->mname); if (st) return st; |
61093792 | 1397 | CSP_ADDSTR(" "); |
0872e289 | 1398 | st= csp_mailbox(vb,rrp->rname); if (st) return st; |
61093792 | 1399 | |
1400 | for (i=0; i<5; i++) { | |
1401 | sprintf(buf," %lu",(&rrp->serial)[i]); | |
1402 | CSP_ADDSTR(buf); | |
1403 | } | |
1404 | ||
1405 | return adns_s_ok; | |
1406 | } | |
1407 | ||
1408 | /* | |
3540caec | 1409 | * _srv* (pa*2,di,cs*2,ckl,postsort) |
bddb4c18 | 1410 | */ |
1411 | ||
3540caec MW |
1412 | static adns_status ckl_srv(adns_state ads, adns_queryflags flags, |
1413 | union checklabel_state *css, qcontext *ctx, | |
1414 | int labnum, const char *label, int lablen) | |
1415 | { | |
1416 | if (labnum < 2 && !(flags & adns_qf_quoteok_query)) { | |
1417 | if (!lablen || label[0] != '_') return adns_s_querydomaininvalid; | |
1418 | label++; lablen--; | |
bddb4c18 | 1419 | } |
3540caec | 1420 | return adns__ckl_hostname(ads, flags, css, ctx, labnum, label, lablen); |
bddb4c18 | 1421 | } |
1422 | ||
7602bb91 | 1423 | static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max, |
375c6c48 | 1424 | adns_rr_srvha *rrp |
1425 | /* might be adns_rr_srvraw* */) { | |
2248cdf4 | 1426 | const byte *dgram= pai->dgram; |
7602bb91 | 1427 | int ti, cbyte; |
1428 | ||
1429 | cbyte= *cbyte_io; | |
1430 | if ((*cbyte_io += 6) > max) return adns_s_invaliddata; | |
2248cdf4 | 1431 | |
1432 | rrp->priority= GET_W(cbyte, ti); | |
1433 | rrp->weight= GET_W(cbyte, ti); | |
1434 | rrp->port= GET_W(cbyte, ti); | |
1435 | return adns_s_ok; | |
1436 | } | |
1437 | ||
1438 | static adns_status pa_srvraw(const parseinfo *pai, int cbyte, | |
1439 | int max, void *datap) { | |
1440 | adns_rr_srvraw *rrp= datap; | |
1441 | adns_status st; | |
1442 | ||
7602bb91 | 1443 | st= pap_srv_begin(pai,&cbyte,max,datap); |
2248cdf4 | 1444 | if (st) return st; |
1445 | ||
1446 | st= pap_domain(pai, &cbyte, max, &rrp->host, | |
1447 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1448 | if (st) return st; | |
1449 | ||
1450 | if (cbyte != max) return adns_s_invaliddata; | |
1451 | return adns_s_ok; | |
1452 | } | |
1453 | ||
1454 | static adns_status pa_srvha(const parseinfo *pai, int cbyte, | |
1455 | int max, void *datap) { | |
1456 | adns_rr_srvha *rrp= datap; | |
1457 | adns_status st; | |
1458 | ||
7602bb91 | 1459 | st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st; |
2248cdf4 | 1460 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st; |
1461 | if (cbyte != max) return adns_s_invaliddata; | |
1462 | return adns_s_ok; | |
1463 | } | |
1464 | ||
1465 | static void mf_srvraw(adns_query qu, void *datap) { | |
1466 | adns_rr_srvraw *rrp= datap; | |
1467 | adns__makefinal_str(qu, &rrp->host); | |
1468 | } | |
1469 | ||
1470 | static void mf_srvha(adns_query qu, void *datap) { | |
1471 | adns_rr_srvha *rrp= datap; | |
1472 | mfp_hostaddr(qu,&rrp->ha); | |
1473 | } | |
1474 | ||
1475 | static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) { | |
1476 | const adns_rr_srvraw *ap= datap_a, *bp= datap_b; | |
1477 | /* might be const adns_rr_svhostaddr* */ | |
1478 | ||
1479 | if (ap->priority < bp->priority) return 0; | |
1480 | if (ap->priority > bp->priority) return 1; | |
1481 | return 0; | |
1482 | } | |
1483 | ||
375c6c48 | 1484 | static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp |
1485 | /* might be adns_rr_srvraw* */) { | |
2248cdf4 | 1486 | char buf[30]; |
1487 | sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port); | |
1488 | CSP_ADDSTR(buf); | |
1489 | return adns_s_ok; | |
1490 | } | |
1491 | ||
1492 | static adns_status cs_srvraw(vbuf *vb, const void *datap) { | |
1493 | const adns_rr_srvraw *rrp= datap; | |
1494 | adns_status st; | |
1495 | ||
375c6c48 | 1496 | st= csp_srv_begin(vb,(const void*)rrp); if (st) return st; |
2248cdf4 | 1497 | return csp_domain(vb,rrp->host); |
1498 | } | |
1499 | ||
1500 | static adns_status cs_srvha(vbuf *vb, const void *datap) { | |
1501 | const adns_rr_srvha *rrp= datap; | |
1502 | adns_status st; | |
1503 | ||
375c6c48 | 1504 | st= csp_srv_begin(vb,(const void*)datap); if (st) return st; |
2248cdf4 | 1505 | return csp_hostaddr(vb,&rrp->ha); |
1506 | } | |
1507 | ||
375c6c48 | 1508 | static void postsort_srv(adns_state ads, void *array, int nrrs, |
59d05d1c | 1509 | const struct typeinfo *typei) { |
375c6c48 | 1510 | /* we treat everything in the array as if it were an adns_rr_srvha |
1511 | * even though the array might be of adns_rr_srvraw. That's OK | |
1512 | * because they have the same prefix, which is all we access. | |
1513 | * We use typei->rrsz, too, rather than naive array indexing, of course. | |
1514 | */ | |
1515 | char *workbegin, *workend, *search, *arrayend; | |
1516 | const adns_rr_srvha *rr; | |
1517 | union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp; | |
1518 | int cpriority, totalweight, runtotal; | |
1519 | long randval; | |
1520 | ||
1521 | for (workbegin= array, arrayend= workbegin + typei->rrsz * nrrs; | |
1522 | workbegin < arrayend; | |
1523 | workbegin= workend) { | |
1524 | cpriority= (rr=(void*)workbegin)->priority; | |
1525 | ||
1526 | for (workend= workbegin, totalweight= 0; | |
1527 | workend < arrayend && (rr=(void*)workend)->priority == cpriority; | |
1528 | workend += typei->rrsz) { | |
1529 | totalweight += rr->weight; | |
375c6c48 | 1530 | } |
1531 | ||
1532 | /* Now workbegin..(workend-1) incl. are exactly all of the RRs of | |
1533 | * cpriority. From now on, workbegin points to the `remaining' | |
1534 | * records: we select one record at a time (RFC2782 `Usage rules' | |
1535 | * and `Format of the SRV RR' subsection `Weight') to place at | |
1536 | * workbegin (swapping with the one that was there, and then | |
1537 | * advance workbegin. */ | |
1538 | for (; | |
1539 | workbegin + typei->rrsz < workend; /* don't bother if just one */ | |
1540 | workbegin += typei->rrsz) { | |
1541 | ||
1542 | randval= nrand48(ads->rand48xsubi); | |
1543 | randval %= (totalweight + 1); | |
375c6c48 | 1544 | /* makes it into 0..totalweight inclusive; with 2^10 RRs, |
1545 | * totalweight must be <= 2^26 so probability nonuniformity is | |
1546 | * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie | |
1547 | * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5). | |
1548 | */ | |
1549 | ||
1550 | for (search=workbegin, runtotal=0; | |
1551 | (runtotal += (rr=(void*)search)->weight) < randval; | |
1552 | search += typei->rrsz); | |
375c6c48 | 1553 | assert(search < arrayend); |
1554 | totalweight -= rr->weight; | |
1555 | if (search != workbegin) { | |
1556 | memcpy(&rrtmp, workbegin, typei->rrsz); | |
1557 | memcpy(workbegin, search, typei->rrsz); | |
1558 | memcpy(search, &rrtmp, typei->rrsz); | |
1559 | } | |
1560 | } | |
1561 | } | |
59d05d1c | 1562 | /* tests: |
1563 | * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk. | |
1564 | * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk. | |
1565 | * ./adnshost_s -t srv- _jabber._tcp.jabber.org | |
1566 | */ | |
1567 | } | |
1568 | ||
bddb4c18 | 1569 | /* |
7d0aaee4 | 1570 | * _byteblock (mf) |
1571 | */ | |
1572 | ||
1573 | static void mf_byteblock(adns_query qu, void *datap) { | |
1574 | adns_rr_byteblock *rrp= datap; | |
1575 | void *bytes= rrp->data; | |
1576 | adns__makefinal_block(qu,&bytes,rrp->len); | |
1577 | rrp->data= bytes; | |
1578 | } | |
1579 | ||
1580 | /* | |
1581 | * _opaque (pa,cs) | |
1582 | */ | |
1583 | ||
1584 | static adns_status pa_opaque(const parseinfo *pai, int cbyte, | |
1585 | int max, void *datap) { | |
1586 | adns_rr_byteblock *rrp= datap; | |
1587 | ||
1588 | rrp->len= max - cbyte; | |
1589 | rrp->data= adns__alloc_interim(pai->qu, rrp->len); | |
1590 | if (!rrp->data) R_NOMEM; | |
1591 | memcpy(rrp->data, pai->dgram + cbyte, rrp->len); | |
1592 | return adns_s_ok; | |
1593 | } | |
1594 | ||
1595 | static adns_status cs_opaque(vbuf *vb, const void *datap) { | |
1596 | const adns_rr_byteblock *rrp= datap; | |
1597 | char buf[10]; | |
1598 | int l; | |
1599 | unsigned char *p; | |
1600 | ||
1601 | sprintf(buf,"\\# %d",rrp->len); | |
1602 | CSP_ADDSTR(buf); | |
1603 | ||
1604 | for (l= rrp->len, p= rrp->data; | |
1605 | l>=4; | |
1606 | l -= 4, p += 4) { | |
1607 | sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]); | |
1608 | CSP_ADDSTR(buf); | |
1609 | } | |
1610 | for (; | |
1611 | l>0; | |
1612 | l--, p++) { | |
1613 | sprintf(buf," %02x",*p); | |
1614 | CSP_ADDSTR(buf); | |
1615 | } | |
1616 | return adns_s_ok; | |
1617 | } | |
1618 | ||
1619 | /* | |
14180727 | 1620 | * _flat (mf) |
1621 | */ | |
1622 | ||
cfdca685 | 1623 | static void mf_flat(adns_query qu, void *data) { } |
1624 | ||
14180727 | 1625 | /* |
1626 | * Now the table. | |
1627 | */ | |
1628 | ||
f2ad23ee | 1629 | #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member)) |
1e9efa71 | 1630 | |
cfdca685 | 1631 | #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb |
1632 | #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb | |
5c596e4d | 1633 | |
bddb4c18 | 1634 | #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \ |
5f8085b7 | 1635 | { adns_r_##code & adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), \ |
3540caec | 1636 | mf_##memb, printer,parser,comparer, adns__ckl_hostname,0,0,0 } |
bddb4c18 | 1637 | #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \ |
5f8085b7 | 1638 | { adns_r_##code & adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), \ |
3540caec | 1639 | mf_flat, printer,parser,comparer, adns__ckl_hostname,0,0,0 } |
5f8085b7 | 1640 | #define XTRA_TYPE(code,rrt,fmt,memb,parser,comparer,printer, \ |
3540caec | 1641 | makefinal,ckl,postsort,getrrsz,sender) \ |
5f8085b7 | 1642 | { adns_r_##code & adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), makefinal, \ |
3540caec | 1643 | printer,parser,comparer,ckl,postsort,getrrsz,sender } |
5c596e4d | 1644 | |
1645 | static const typeinfo typeinfos[] = { | |
14180727 | 1646 | /* Must be in ascending order of rrtype ! */ |
9c344a42 | 1647 | /* mem-mgmt code rrt fmt member parser comparer printer */ |
1648 | ||
1649 | FLAT_TYPE(a, "A", 0, inaddr, pa_inaddr, di_inaddr,cs_inaddr ), | |
1650 | DEEP_TYPE(ns_raw, "NS", "raw",str, pa_host_raw,0, cs_domain ), | |
1651 | DEEP_TYPE(cname, "CNAME", 0, str, pa_dom_raw, 0, cs_domain ), | |
1652 | DEEP_TYPE(soa_raw,"SOA", "raw",soa, pa_soa, 0, cs_soa ), | |
1653 | DEEP_TYPE(ptr_raw,"PTR", "raw",str, pa_host_raw,0, cs_domain ), | |
1654 | DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,pa_hinfo, 0, cs_hinfo ), | |
1655 | DEEP_TYPE(mx_raw, "MX", "raw",intstr, pa_mx_raw, di_mx_raw,cs_inthost ), | |
1656 | DEEP_TYPE(txt, "TXT", 0, manyistr,pa_txt, 0, cs_txt ), | |
1657 | DEEP_TYPE(rp_raw, "RP", "raw",strpair, pa_rp, 0, cs_rp ), | |
9136cf0c | 1658 | FLAT_TYPE(aaaa, "AAAA", 0, in6addr, pa_in6addr, di_in6addr,cs_in6addr ), |
59d05d1c | 1659 | XTRA_TYPE(srv_raw,"SRV", "raw",srvraw , pa_srvraw, di_srv, cs_srvraw, |
3540caec | 1660 | mf_srvraw, ckl_srv, postsort_srv, 0, 0), |
9c344a42 | 1661 | |
5f8085b7 | 1662 | XTRA_TYPE(addr, "A", "addr", addr, pa_addr, di_addr, cs_addr, |
3540caec | 1663 | mf_flat, adns__ckl_hostname, 0, gsz_addr, qs_addr), |
9c344a42 | 1664 | DEEP_TYPE(ns, "NS", "+addr",hostaddr,pa_hostaddr,di_hostaddr,cs_hostaddr ), |
e4007092 MW |
1665 | XTRA_TYPE(ptr, "PTR","checked",str, pa_ptr, 0, cs_domain, |
1666 | mf_str, ckl_ptr, 0, 0, 0), | |
9c344a42 | 1667 | DEEP_TYPE(mx, "MX", "+addr",inthostaddr,pa_mx, di_mx, cs_inthostaddr), |
59d05d1c | 1668 | XTRA_TYPE(srv, "SRV","+addr",srvha, pa_srvha, di_srv, cs_srvha, |
3540caec | 1669 | mf_srvha, ckl_srv, postsort_srv, 0, 0), |
bddb4c18 | 1670 | |
9c344a42 | 1671 | DEEP_TYPE(soa, "SOA","822", soa, pa_soa, 0, cs_soa ), |
1672 | DEEP_TYPE(rp, "RP", "822", strpair, pa_rp, 0, cs_rp ), | |
5c596e4d | 1673 | }; |
1674 | ||
0b5062df MW |
1675 | static const typeinfo tinfo_addrsub = |
1676 | XTRA_TYPE(none, "<addr>","sub",addr, pa_addr, 0, cs_addr, | |
3540caec | 1677 | mf_flat, adns__ckl_hostname, 0, gsz_addr, 0); |
0b5062df | 1678 | |
7d0aaee4 | 1679 | static const typeinfo typeinfo_unknown= |
1680 | DEEP_TYPE(unknown,0, "unknown",byteblock,pa_opaque, 0, cs_opaque ); | |
1681 | ||
c9afe7bb | 1682 | const typeinfo *adns__findtype(adns_rrtype type) { |
1683 | const typeinfo *begin, *end, *mid; | |
5c596e4d | 1684 | |
7d0aaee4 | 1685 | if (type & adns_r_unknown) return &typeinfo_unknown; |
5f8085b7 | 1686 | type &= adns_rrt_reprmask; |
7d0aaee4 | 1687 | |
5c596e4d | 1688 | begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo)); |
1689 | ||
1690 | while (begin < end) { | |
1691 | mid= begin + ((end-begin)>>1); | |
7d0aaee4 | 1692 | if (mid->typekey == type) return mid; |
1693 | if (type > mid->typekey) begin= mid+1; | |
5c596e4d | 1694 | else end= mid; |
1695 | } | |
1696 | return 0; | |
1697 | } |