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) | |
5f8085b7 | 54 | * _addr (pap,pa,di,csp,cs,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) | |
59d05d1c | 69 | * _srv* (qdpl,(pap),pa,mf,di,(csp),cs,postsort) |
7d0aaee4 | 70 | * _byteblock (mf) |
71 | * _opaque (pa,cs) | |
14180727 | 72 | * _flat (mf) |
73 | * | |
74 | * within each section: | |
2248cdf4 | 75 | * qdpl_* |
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 MW |
277 | i<ads->nsortlist && |
278 | !(af == slp->ai->af && | |
279 | slp->ai->matchp(ad, &slp->base, &slp->mask)) && | |
280 | !(v6mappedp && slp->ai->af == AF_INET && | |
281 | slp->ai->matchp(&a, &slp->base, &slp->mask)); | |
8c3aa944 | 282 | i++, slp++); |
283 | return i; | |
14180727 | 284 | } |
285 | ||
9136cf0c | 286 | static int dip_genaddr(adns_state ads, int af, const void *a, const void *b) { |
8c3aa944 | 287 | int ai, bi; |
288 | ||
289 | if (!ads->nsortlist) return 0; | |
290 | ||
9136cf0c MW |
291 | ai= search_sortlist(ads,af,a); |
292 | bi= search_sortlist(ads,af,b); | |
8c3aa944 | 293 | return bi<ai; |
294 | } | |
295 | ||
9c344a42 | 296 | static int di_inaddr(adns_state ads, |
297 | const void *datap_a, const void *datap_b) { | |
9136cf0c | 298 | return dip_genaddr(ads,AF_INET,datap_a,datap_b); |
f2ad23ee | 299 | } |
300 | ||
301 | static adns_status cs_inaddr(vbuf *vb, const void *datap) { | |
302 | const struct in_addr *rrp= datap, rr= *rrp; | |
1e9efa71 | 303 | const char *ia; |
304 | ||
f2ad23ee | 305 | ia= inet_ntoa(rr); assert(ia); |
26eb6bdc | 306 | CSP_ADDSTR(ia); |
307 | return adns_s_ok; | |
1e9efa71 | 308 | } |
68b7fc5f | 309 | |
14180727 | 310 | /* |
9136cf0c MW |
311 | * _in6addr (pa,di,cs) |
312 | */ | |
313 | ||
314 | static adns_status pa_in6addr(const parseinfo *pai, int cbyte, | |
315 | int max, void *datap) { | |
316 | struct in6_addr *storeto= datap; | |
317 | ||
318 | if (max-cbyte != 16) return adns_s_invaliddata; | |
319 | memcpy(storeto->s6_addr, pai->dgram + cbyte, 16); | |
320 | return adns_s_ok; | |
321 | } | |
322 | ||
323 | static int di_in6addr(adns_state ads, | |
324 | const void *datap_a, const void *datap_b) { | |
5f8085b7 | 325 | return dip_genaddr(ads,AF_INET6,datap_a,datap_b); |
9136cf0c MW |
326 | } |
327 | ||
328 | static adns_status cs_in6addr(vbuf *vb, const void *datap) { | |
329 | char buf[INET6_ADDRSTRLEN]; | |
330 | const char *ia; | |
331 | ||
332 | ia= inet_ntop(AF_INET6, datap, buf, sizeof(buf)); assert(ia); | |
333 | CSP_ADDSTR(ia); | |
334 | return adns_s_ok; | |
335 | } | |
336 | ||
337 | /* | |
5f8085b7 MW |
338 | * _addr (pap,pa,di,csp,cs,qs, +search_sortlist_sa, dip_sockaddr, |
339 | * addr_rrtypes, addr_rrsz) | |
14180727 | 340 | */ |
341 | ||
0aa4a357 MW |
342 | /* About CNAME handling in addr queries. |
343 | * | |
344 | * A user-level addr query is translated into a number of protocol-level | |
345 | * queries, and its job is to reassemble the results. This gets tricky if | |
346 | * the answers aren't consistent. In particular, if the answers report | |
347 | * inconsistent indirection via CNAME records (e.g., different CNAMEs, or | |
348 | * some indirect via a CNAME, and some don't) then we have trouble. | |
349 | * | |
350 | * Once we've received an answer, even if it was NODATA, we set | |
351 | * adns__qf_addr_answer on the parent query. This will let us detect a | |
352 | * conflict between a no-CNAME-with-NODATA reply and a subsequent CNAME. | |
353 | * | |
354 | * If we detect a conflict of any kind, then at least one answer came back | |
355 | * with a CNAME record, so we pick the first such answer (somewhat | |
356 | * arbitrarily) as being the `right' canonical name, and set this in the | |
357 | * parent query's answer->cname slot. We discard address records from the | |
358 | * wrong name. And finally we cancel the outstanding child queries, and | |
359 | * resubmit address queries for the address families we don't yet have, with | |
360 | * adns__qf_addr_cname set so that we know that we're in the fixup state. | |
361 | */ | |
362 | ||
5f8085b7 MW |
363 | static adns_status pap_addr(const parseinfo *pai, int rrty, size_t rrsz, |
364 | int *cbyte_io, int max, adns_rr_addr *storeto) | |
365 | { | |
26eb6bdc | 366 | const byte *dgram= pai->dgram; |
5f8085b7 MW |
367 | int af, addrlen, salen; |
368 | struct in6_addr v6map; | |
369 | const void *oaddr = dgram + *cbyte_io; | |
370 | int avail = max - *cbyte_io; | |
371 | int step = -1; | |
372 | void *addrp = 0; | |
373 | ||
374 | switch (rrty) { | |
375 | case adns_r_a: | |
bcfd6f13 | 376 | if (pai->qu->flags & adns_qf_domapv4) { |
5f8085b7 MW |
377 | if (avail < 4) return adns_s_invaliddata; |
378 | memset(v6map.s6_addr + 0, 0x00, 10); | |
379 | memset(v6map.s6_addr + 10, 0xff, 2); | |
380 | memcpy(v6map.s6_addr + 12, oaddr, 4); | |
381 | oaddr = v6map.s6_addr; avail = sizeof(v6map.s6_addr); | |
382 | if (step < 0) step = 4; | |
383 | goto aaaa; | |
384 | } | |
385 | af = AF_INET; addrlen = 4; | |
386 | addrp = &storeto->addr.inet.sin_addr; | |
387 | salen = sizeof(storeto->addr.inet); | |
388 | break; | |
389 | case adns_r_aaaa: | |
390 | aaaa: | |
391 | af = AF_INET6; addrlen = 16; | |
392 | addrp = storeto->addr.inet6.sin6_addr.s6_addr; | |
393 | salen = sizeof(storeto->addr.inet6); | |
394 | break; | |
395 | } | |
396 | assert(addrp); | |
397 | ||
398 | assert(offsetof(adns_rr_addr, addr) + salen <= rrsz); | |
399 | if (addrlen < avail) return adns_s_invaliddata; | |
400 | if (step < 0) step = addrlen; | |
401 | *cbyte_io += step; | |
402 | memset(&storeto->addr, 0, salen); | |
403 | storeto->len = salen; | |
404 | storeto->addr.sa.sa_family = af; | |
405 | memcpy(addrp, oaddr, addrlen); | |
a1d2d0ed | 406 | |
5f8085b7 MW |
407 | return adns_s_ok; |
408 | } | |
409 | ||
410 | static adns_status pa_addr(const parseinfo *pai, int cbyte, | |
411 | int max, void *datap) { | |
412 | int err = pap_addr(pai, pai->qu->answer->type & adns_rrt_typemask, | |
413 | pai->qu->answer->rrsz, &cbyte, max, datap); | |
414 | if (err) return err; | |
415 | if (cbyte != max) return adns_s_invaliddata; | |
cd363ffd | 416 | return adns_s_ok; |
417 | } | |
418 | ||
9136cf0c MW |
419 | static int search_sortlist_sa(adns_state ads, const struct sockaddr *sa) |
420 | { | |
5f8085b7 | 421 | const afinfo *ai = 0; |
9136cf0c MW |
422 | |
423 | switch (sa->sa_family) { | |
424 | case AF_INET: ai = &adns__inet_afinfo; break; | |
425 | case AF_INET6: ai = &adns__inet6_afinfo; break; | |
426 | } | |
427 | assert(ai); | |
428 | ||
429 | return search_sortlist(ads, sa->sa_family, ai->sockaddr_to_inaddr(sa)); | |
430 | } | |
431 | ||
432 | static int dip_sockaddr(adns_state ads, | |
433 | const struct sockaddr *sa, | |
434 | const struct sockaddr *sb) | |
435 | { | |
436 | if (!ads->sortlist) return 0; | |
437 | return search_sortlist_sa(ads, sa) > search_sortlist_sa(ads, sb); | |
438 | } | |
439 | ||
8c3aa944 | 440 | static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) { |
bc01473e | 441 | const adns_rr_addr *ap= datap_a, *bp= datap_b; |
cd363ffd | 442 | |
9136cf0c | 443 | return dip_sockaddr(ads, &ap->addr.sa, &bp->addr.sa); |
cd363ffd | 444 | } |
445 | ||
8c3aa944 | 446 | static int div_addr(void *context, const void *datap_a, const void *datap_b) { |
447 | const adns_state ads= context; | |
448 | ||
449 | return di_addr(ads, datap_a, datap_b); | |
450 | } | |
451 | ||
bc01473e | 452 | static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) { |
5f8085b7 MW |
453 | char buf[128]; |
454 | int err; | |
cd363ffd | 455 | |
456 | switch (rrp->addr.inet.sin_family) { | |
457 | case AF_INET: | |
0872e289 | 458 | CSP_ADDSTR("INET "); |
5f8085b7 MW |
459 | goto ntop; |
460 | case AF_INET6: | |
461 | CSP_ADDSTR("INET6 "); | |
462 | goto ntop; | |
463 | ntop: | |
464 | err= getnameinfo(&rrp->addr.sa, rrp->len, buf, sizeof(buf), 0, 0, | |
465 | NI_NUMERICHOST); assert(!err); | |
466 | CSP_ADDSTR(buf); | |
cd363ffd | 467 | break; |
468 | default: | |
469 | sprintf(buf,"AF=%u",rrp->addr.sa.sa_family); | |
26eb6bdc | 470 | CSP_ADDSTR(buf); |
cd363ffd | 471 | break; |
472 | } | |
473 | return adns_s_ok; | |
474 | } | |
475 | ||
26eb6bdc | 476 | static adns_status cs_addr(vbuf *vb, const void *datap) { |
bc01473e | 477 | const adns_rr_addr *rrp= datap; |
26eb6bdc | 478 | |
479 | return csp_addr(vb,rrp); | |
480 | } | |
481 | ||
5f8085b7 MW |
482 | #define ADDR_MAXRRTYPES 2 |
483 | ||
484 | static void addr_rrtypes(adns_state ads, adns_rrtype type, | |
485 | adns_queryflags qf, | |
486 | adns_rrtype *rrty, size_t *nrrty) | |
487 | { | |
488 | size_t n = 0; | |
489 | adns_rrtype qtf = type & adns__qtf_deref; | |
490 | ||
bcfd6f13 MW |
491 | if (!(type & adns__qtf_bigaddr) || !(type & adns__qtf_manyaf)) |
492 | qf = (qf & adns__qf_afmask) | adns_qf_ipv4_only; | |
493 | ||
494 | if (qf & adns_qf_ipv4_only) rrty[n++] = adns_r_a | qtf; | |
495 | if (qf & adns_qf_ipv6_only) rrty[n++] = adns_r_aaaa | qtf; | |
5f8085b7 MW |
496 | |
497 | *nrrty = n; | |
498 | } | |
499 | ||
500 | static size_t addr_rrsz(adns_query qu) | |
501 | { | |
502 | return qu->answer->type & adns__qtf_bigaddr ? | |
503 | sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only); | |
504 | } | |
505 | ||
4678dd22 | 506 | static adns_status append_addrs(adns_query qu, adns_query from, size_t rrsz, |
bcfd6f13 MW |
507 | adns_rr_addr **dp, int *dlen, |
508 | const adns_rr_addr *sp, int slen) | |
509 | { | |
510 | size_t drrsz = *dlen*rrsz, srrsz = slen*rrsz; | |
511 | byte *p = adns__alloc_interim(qu, drrsz + srrsz); | |
512 | if (!p) R_NOMEM; | |
513 | if (*dlen) { | |
514 | memcpy(p, *dp, drrsz); | |
515 | adns__free_interim(qu, *dp); | |
516 | } | |
517 | memcpy(p + drrsz, sp, srrsz); | |
518 | *dlen += slen; | |
519 | *dp = (adns_rr_addr *)p; | |
4678dd22 | 520 | if (from && qu->expires > from->expires) qu->expires = from->expires; |
bcfd6f13 MW |
521 | return adns_s_ok; |
522 | } | |
523 | ||
96818a13 | 524 | static void icb_addr(adns_query parent, adns_query child); |
5f8085b7 | 525 | |
bcfd6f13 | 526 | static void addr_subqueries(adns_query qu, struct timeval now, |
96818a13 | 527 | const byte *qd_dgram, int qd_dglen, |
bcfd6f13 | 528 | const adns_rrtype *rrty, size_t nrrty) |
5f8085b7 | 529 | { |
bcfd6f13 | 530 | int i, err, id; |
5f8085b7 MW |
531 | adns_query cqu; |
532 | adns_queryflags qf = | |
533 | (qu->flags | adns__qf_senddirect) & | |
534 | ~(adns_qf_search); | |
535 | qcontext ctx; | |
536 | ||
5f8085b7 MW |
537 | if (!(qu->answer->type & adns__qtf_bigaddr)) |
538 | qu->answer->rrsz = sizeof(adns_rr_addr_v4only); | |
539 | ||
540 | /* This always makes child queries, even if there's only the one. This | |
541 | * seems wasteful, but there's only one case where it'd be safe -- namely | |
542 | * IPv4-only -- and that's not the case I want to optimize. | |
543 | */ | |
544 | memset(&ctx, 0, sizeof(ctx)); | |
545 | ctx.callback = icb_addr; | |
546 | for (i = 0; i < nrrty; i++) { | |
96818a13 MW |
547 | err = adns__mkquery_frdgram(qu->ads, &qu->vb, &id, qd_dgram, |
548 | qd_dglen, DNS_HDRSIZE, rrty[i], qf); | |
5f8085b7 MW |
549 | if (err) goto x_error; |
550 | err = adns__internal_submit(qu->ads, &cqu, qu->typei, rrty[i], | |
551 | &qu->vb, id, qf, now, &ctx); | |
552 | if (err) goto x_error; | |
553 | cqu->answer->rrsz = qu->answer->rrsz; | |
554 | cqu->parent = qu; | |
555 | LIST_LINK_TAIL_PART(qu->children, cqu,siblings.); | |
556 | } | |
bcfd6f13 MW |
557 | qu->state = query_childw; |
558 | LIST_LINK_TAIL(qu->ads->childw, qu); | |
5f8085b7 MW |
559 | return; |
560 | ||
561 | x_error: | |
562 | adns__query_fail(qu, err); | |
563 | } | |
564 | ||
bcfd6f13 MW |
565 | static adns_status addr_submit(adns_query parent, adns_query *query_r, |
566 | vbuf *qumsg_vb, int id, | |
567 | const adns_rrtype *rrty, size_t nrrty, | |
568 | adns_queryflags flags, struct timeval now, | |
569 | const qcontext *ctx) | |
570 | { | |
571 | /* This is effectively a substitute for adns__internal_submit, intended for | |
572 | * the case where the caller (possibly) only wants a subset of the | |
573 | * available record types. The memory management and callback rules are | |
574 | * the same as for adns__internal_submit. | |
575 | * | |
576 | * Some differences: the query is linked onto the parent's children list | |
577 | * before exit (though the parent's state is not changed, and it is not | |
578 | * linked into the childw list queue). | |
579 | */ | |
580 | ||
581 | adns_state ads = parent->ads; | |
582 | adns_status err; | |
583 | adns_rrtype type = | |
584 | (adns_r_addr & adns_rrt_reprmask) | | |
585 | (parent->answer->type & ~adns_rrt_reprmask); | |
586 | ||
587 | err = adns__internal_submit(ads, query_r, adns__findtype(adns_r_addr), | |
588 | type, qumsg_vb, id, flags | adns__qf_nosend, | |
589 | now, ctx); | |
590 | if (err) return err; | |
591 | ||
592 | (*query_r)->parent = parent; | |
593 | LIST_LINK_TAIL_PART(parent->children, *query_r, siblings.); | |
96818a13 MW |
594 | addr_subqueries(*query_r, now, parent->query_dgram, |
595 | parent->query_dglen, rrty, nrrty); | |
bcfd6f13 MW |
596 | return adns_s_ok; |
597 | } | |
598 | ||
96818a13 MW |
599 | static adns_status copy_cname_from_child(adns_query parent, adns_query child) |
600 | { | |
601 | adns_answer *pans = parent->answer, *cans = child->answer; | |
602 | size_t n = strlen(cans->cname) + 1; | |
603 | ||
604 | pans->cname = adns__alloc_preserved(parent, n); | |
605 | if (!pans->cname) R_NOMEM; | |
606 | memcpy(pans->cname, cans->cname, n); | |
607 | return adns_s_ok; | |
608 | } | |
609 | ||
610 | static void icb_addr(adns_query parent, adns_query child) | |
611 | { | |
612 | adns_state ads = parent->ads; | |
613 | adns_answer *pans = parent->answer, *cans = child->answer; | |
614 | struct timeval tvbuf; | |
615 | adns_status err; | |
616 | const struct timeval *now = 0; | |
617 | adns_rrtype rrty[ADDR_MAXRRTYPES], ty; | |
618 | byte *p; | |
619 | adns_rr_addr *a; | |
620 | int i, j, id; | |
621 | size_t nrrty; | |
622 | ||
623 | if (!(child->flags & adns__qf_addr_cname) && | |
624 | (parent->flags & adns__qf_addr_answer) && | |
625 | (!pans->cname != !cans->cname || | |
626 | (pans->cname && strcmp(pans->cname, pans->cname) != 0))) { | |
627 | /* We've detected an inconsistency in CNAME records, and must deploy | |
628 | * countermeasures. | |
629 | */ | |
630 | ||
631 | if (!pans->cname) { | |
632 | /* The child has a CNAME record, but the parent doesn't. We must | |
633 | * discard all of the parent's addresses, and substitute the child's. | |
634 | */ | |
635 | ||
636 | assert(pans->rrsz == cans->rrsz); | |
637 | adns__free_interim(parent, pans->rrs.bytes); | |
638 | adns__transfer_interim(child, parent, cans->rrs.bytes); | |
639 | pans->rrs.bytes = cans->rrs.bytes; | |
640 | pans->nrrs = cans->nrrs; | |
641 | err = copy_cname_from_child(parent, child); if (err) goto x_err; | |
642 | } | |
643 | ||
644 | /* We've settled on the CNAME (now) associated with the parent, which | |
645 | * already has appropriate address records. Build a query datagram for | |
646 | * this name so that we can issue child queries for the missing address | |
647 | * families. The child's vbuf looks handy for this. | |
648 | */ | |
649 | err = adns__mkquery(ads, &child->vb, &id, pans->cname, | |
650 | strlen(pans->cname), adns__findtype(adns_r_addr), | |
651 | adns_r_addr, parent->flags); | |
652 | if (err) goto x_err; | |
653 | ||
654 | /* Work out which address rrtypes we want but don't have. */ | |
655 | addr_rrtypes(ads, pans->type, parent->flags, rrty, &nrrty); | |
656 | for (i = 0, p = pans->rrs.bytes; i < pans->nrrs; i++, p += pans->rrsz) { | |
657 | a = (adns_rr_addr *)p; | |
658 | ty = 0; | |
659 | switch (a->addr.sa.sa_family) { | |
660 | case AF_INET: ty = adns_r_a; break; | |
661 | case AF_INET6: ty = adns_r_aaaa; break; | |
662 | } | |
663 | assert(ty); | |
664 | for (j = 0; j < nrrty && ty != (rrty[j] & adns_rrt_typemask); j++); | |
665 | if (j < nrrty) rrty[j] = rrty[--nrrty]; | |
666 | } | |
667 | assert(nrrty); | |
668 | ||
669 | /* Now cancel the remaining children, and try again with the CNAME we've | |
670 | * settled on. | |
671 | */ | |
672 | adns__cancel_children(parent); | |
673 | adns__must_gettimeofday(ads, &now, &tvbuf); | |
674 | if (now) { | |
675 | addr_subqueries(parent, *now, child->vb.buf, | |
676 | child->vb.used, rrty, nrrty); | |
677 | } | |
678 | return; | |
679 | } | |
680 | ||
681 | if (cans->cname && !pans->cname) { | |
682 | err = copy_cname_from_child(parent, child); | |
683 | if (err) goto x_err; | |
684 | } | |
685 | ||
686 | if ((parent->flags & adns_qf_search) && | |
687 | !pans->cname && cans->status == adns_s_nxdomain) { | |
688 | /* We're searching a list of suffixes, this is the first answer, and it | |
689 | * tells us that the name doesn't exist. Try the next one. | |
690 | */ | |
691 | ||
692 | if (parent->expires > child->expires) parent->expires = child->expires; | |
693 | adns__cancel_children(parent); | |
694 | adns__free_interim(parent, pans->rrs.bytes); | |
695 | pans->rrs.bytes = 0; pans->nrrs = 0; | |
696 | adns__must_gettimeofday(ads, &now, &tvbuf); | |
697 | if (now) adns__search_next(ads, parent, *now); | |
698 | return; | |
699 | } | |
700 | ||
701 | if (cans->status && cans->status != adns_s_nodata) | |
702 | { err = cans->status; goto x_err; } | |
703 | ||
704 | assert(pans->rrsz == cans->rrsz); | |
705 | err = append_addrs(parent, child, pans->rrsz, | |
706 | &pans->rrs.addr, &pans->nrrs, | |
707 | cans->rrs.addr, cans->nrrs); | |
708 | if (err) goto x_err; | |
709 | ||
710 | if (parent->children.head) LIST_LINK_TAIL(ads->childw, parent); | |
711 | else if (!pans->nrrs) adns__query_fail(parent, adns_s_nodata); | |
712 | else adns__query_done(parent); | |
713 | parent->flags |= adns__qf_addr_answer; | |
714 | return; | |
715 | ||
716 | x_err: | |
717 | adns__query_fail(parent, err); | |
718 | } | |
719 | ||
bcfd6f13 MW |
720 | static void qs_addr(adns_query qu, struct timeval now) |
721 | { | |
722 | adns_rrtype rrty[ADDR_MAXRRTYPES]; | |
723 | size_t nrrty; | |
724 | ||
725 | addr_rrtypes(qu->ads, qu->answer->type, qu->flags, rrty, &nrrty); | |
96818a13 MW |
726 | addr_subqueries(qu, now, qu->query_dgram, |
727 | qu->query_dglen, rrty, nrrty); | |
bcfd6f13 MW |
728 | } |
729 | ||
14180727 | 730 | /* |
0872e289 | 731 | * _domain (pap,csp,cs) |
732 | * _dom_raw (pa) | |
14180727 | 733 | */ |
734 | ||
26eb6bdc | 735 | static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max, |
736 | char **domain_r, parsedomain_flags flags) { | |
f2ad23ee | 737 | adns_status st; |
738 | char *dm; | |
739 | ||
26eb6bdc | 740 | st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags, |
741 | pai->dgram,pai->dglen, cbyte_io, max); | |
f2ad23ee | 742 | if (st) return st; |
26eb6bdc | 743 | if (!pai->qu->vb.used) return adns_s_invaliddata; |
f2ad23ee | 744 | |
26eb6bdc | 745 | dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1); |
746 | if (!dm) R_NOMEM; | |
f2ad23ee | 747 | |
26eb6bdc | 748 | dm[pai->qu->vb.used]= 0; |
749 | memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used); | |
f2ad23ee | 750 | |
751 | *domain_r= dm; | |
752 | return adns_s_ok; | |
753 | } | |
754 | ||
0872e289 | 755 | static adns_status csp_domain(vbuf *vb, const char *domain) { |
756 | CSP_ADDSTR(domain); | |
757 | if (!*domain) CSP_ADDSTR("."); | |
758 | return adns_s_ok; | |
759 | } | |
760 | ||
761 | static adns_status cs_domain(vbuf *vb, const void *datap) { | |
762 | const char *const *domainp= datap; | |
763 | return csp_domain(vb,*domainp); | |
764 | } | |
765 | ||
9c344a42 | 766 | static adns_status pa_dom_raw(const parseinfo *pai, int cbyte, |
767 | int max, void *datap) { | |
0872e289 | 768 | char **rrp= datap; |
769 | adns_status st; | |
770 | ||
771 | st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok); | |
772 | if (st) return st; | |
773 | ||
774 | if (cbyte != max) return adns_s_invaliddata; | |
775 | return adns_s_ok; | |
776 | } | |
777 | ||
14180727 | 778 | /* |
779 | * _host_raw (pa) | |
780 | */ | |
781 | ||
9c344a42 | 782 | static adns_status pa_host_raw(const parseinfo *pai, int cbyte, |
783 | int max, void *datap) { | |
f2ad23ee | 784 | char **rrp= datap; |
cfdca685 | 785 | adns_status st; |
1e9efa71 | 786 | |
26eb6bdc | 787 | st= pap_domain(pai, &cbyte, max, rrp, |
788 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
f2ad23ee | 789 | if (st) return st; |
790 | ||
791 | if (cbyte != max) return adns_s_invaliddata; | |
792 | return adns_s_ok; | |
793 | } | |
cfdca685 | 794 | |
14180727 | 795 | /* |
bc01473e | 796 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +icb_hostaddr, pap_findaddrs) |
14180727 | 797 | */ |
a1d2d0ed | 798 | |
26eb6bdc | 799 | static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha, |
bcfd6f13 MW |
800 | adns_rrtype *rrty, size_t *nrrty_io, |
801 | size_t addrsz, int *cbyte_io, int count, | |
802 | int dmstart) { | |
5f8085b7 MW |
803 | int rri, naddrs, j; |
804 | int type, class, rdlen, rdend, rdstart, ownermatched; | |
bcfd6f13 | 805 | size_t nrrty = *nrrty_io; |
2c7b101b | 806 | unsigned long ttl; |
26eb6bdc | 807 | adns_status st; |
a1d2d0ed | 808 | |
bcfd6f13 | 809 | for (rri=0, naddrs=0; rri<count; rri++) { |
9c344a42 | 810 | st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram, |
811 | pai->dglen, cbyte_io, | |
2c7b101b | 812 | &type, &class, &ttl, &rdlen, &rdstart, |
26eb6bdc | 813 | pai->dgram, pai->dglen, dmstart, &ownermatched); |
a1d2d0ed | 814 | if (st) return st; |
bcfd6f13 | 815 | if (!ownermatched || class != DNS_CLASS_IN) continue; |
5f8085b7 MW |
816 | for (j = 0; j < nrrty && type != (rrty[j] & adns_rrt_typemask); j++); |
817 | if (j >= nrrty) continue; | |
bcfd6f13 MW |
818 | if (j < *nrrty_io) { |
819 | (*nrrty_io)--; | |
820 | adns_rrtype t = rrty[j]; | |
821 | rrty[j] = rrty[*nrrty_io]; | |
822 | rrty[*nrrty_io] = t; | |
823 | } | |
824 | if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*addrsz)) R_NOMEM; | |
2c7b101b | 825 | adns__update_expires(pai->qu,ttl,pai->now); |
5f8085b7 MW |
826 | rdend = rdstart + rdlen; |
827 | st= pap_addr(pai, type, addrsz, &rdstart, rdend, | |
828 | (adns_rr_addr *)(pai->qu->vb.buf + naddrs*addrsz)); | |
a1d2d0ed | 829 | if (st) return st; |
5f8085b7 | 830 | if (rdstart != rdend) return adns_s_invaliddata; |
26eb6bdc | 831 | naddrs++; |
a1d2d0ed | 832 | } |
bcfd6f13 | 833 | if (naddrs > 0) { |
4678dd22 | 834 | st = append_addrs(pai->qu, 0, addrsz, &ha->addrs, &ha->naddrs, |
bcfd6f13 MW |
835 | (const adns_rr_addr *)pai->qu->vb.buf, naddrs); |
836 | if (st) return st; | |
a1d2d0ed | 837 | ha->astatus= adns_s_ok; |
26eb6bdc | 838 | |
bcfd6f13 MW |
839 | if (!*nrrty_io) { |
840 | adns__isort(ha->addrs, naddrs, addrsz, pai->qu->vb.buf, | |
841 | div_addr, pai->ads); | |
842 | } | |
a1d2d0ed | 843 | } |
844 | return adns_s_ok; | |
845 | } | |
846 | ||
bc01473e | 847 | static void icb_hostaddr(adns_query parent, adns_query child) { |
bc01473e | 848 | adns_answer *cans= child->answer; |
cd1bde2f | 849 | adns_rr_hostaddr *rrp= child->ctx.info.hostaddr; |
cb32030b | 850 | adns_state ads= parent->ads; |
0872e289 | 851 | adns_status st; |
bcfd6f13 | 852 | size_t addrsz = addr_rrsz(parent); |
bc01473e | 853 | |
bcfd6f13 | 854 | st= cans->status == adns_s_nodata ? adns_s_ok : cans->status; |
0872e289 | 855 | rrp->astatus= st; |
bcfd6f13 MW |
856 | |
857 | if (st) goto done; | |
858 | assert(addrsz == cans->rrsz); | |
4678dd22 | 859 | st = append_addrs(parent, child, addrsz, |
bcfd6f13 MW |
860 | &rrp->addrs, &rrp->naddrs, |
861 | cans->rrs.addr, cans->nrrs); | |
862 | if (st) goto done; | |
863 | if (!rrp->naddrs) { st = adns_s_nodata; goto done; } | |
864 | ||
865 | if (!adns__vbuf_ensure(&parent->vb, addrsz)) | |
866 | { st = adns_s_nomemory; goto done; } | |
867 | adns__isort(rrp->addrs, rrp->naddrs, addrsz, parent->vb.buf, | |
868 | div_addr, ads); | |
869 | ||
870 | done: | |
871 | if (st) { | |
872 | adns__free_interim(parent, rrp->addrs); | |
873 | rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : cans->nrrs; | |
874 | } | |
cd1bde2f | 875 | |
cb32030b | 876 | if (parent->children.head) { |
877 | LIST_LINK_TAIL(ads->childw,parent); | |
878 | } else { | |
879 | adns__query_done(parent); | |
880 | } | |
bc01473e | 881 | } |
882 | ||
26eb6bdc | 883 | static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io, |
884 | int max, adns_rr_hostaddr *rrp) { | |
a1d2d0ed | 885 | adns_status st; |
886 | int dmstart, cbyte; | |
ba1ddf08 | 887 | qcontext ctx; |
888 | int id; | |
889 | adns_query nqu; | |
59fbb06a | 890 | adns_queryflags nflags; |
bcfd6f13 MW |
891 | adns_rrtype rrty[ADDR_MAXRRTYPES]; |
892 | size_t nrrty; | |
893 | size_t addrsz = addr_rrsz(pai->qu); | |
a1d2d0ed | 894 | |
895 | dmstart= cbyte= *cbyte_io; | |
26eb6bdc | 896 | st= pap_domain(pai, &cbyte, max, &rrp->host, |
897 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
a1d2d0ed | 898 | if (st) return st; |
899 | *cbyte_io= cbyte; | |
900 | ||
901 | rrp->astatus= adns_s_ok; | |
bcfd6f13 | 902 | rrp->naddrs= 0; |
a1d2d0ed | 903 | rrp->addrs= 0; |
904 | ||
26eb6bdc | 905 | cbyte= pai->nsstart; |
a1d2d0ed | 906 | |
bcfd6f13 MW |
907 | addr_rrtypes(pai->ads, pai->qu->answer->type, |
908 | pai->qu->flags, rrty, &nrrty); | |
909 | ||
910 | st= pap_findaddrs(pai, rrp, rrty, &nrrty, addrsz, | |
911 | &cbyte, pai->nscount, dmstart); | |
a1d2d0ed | 912 | if (st) return st; |
bcfd6f13 | 913 | if (!nrrty) return adns_s_ok; |
a1d2d0ed | 914 | |
bcfd6f13 MW |
915 | st= pap_findaddrs(pai, rrp, rrty, &nrrty, addrsz, |
916 | &cbyte, pai->arcount, dmstart); | |
a1d2d0ed | 917 | if (st) return st; |
bcfd6f13 | 918 | if (!nrrty) return adns_s_ok; |
26eb6bdc | 919 | |
ba1ddf08 | 920 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
921 | pai->dgram, pai->dglen, dmstart, | |
922 | adns_r_addr, adns_qf_quoteok_query); | |
923 | if (st) return st; | |
bc01473e | 924 | |
cd1bde2f | 925 | ctx.ext= 0; |
926 | ctx.callback= icb_hostaddr; | |
927 | ctx.info.hostaddr= rrp; | |
59fbb06a | 928 | |
bcfd6f13 | 929 | nflags= adns_qf_quoteok_query | (pai->qu->flags & adns__qf_afmask); |
59fbb06a | 930 | if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid; |
931 | ||
bcfd6f13 MW |
932 | st= addr_submit(pai->qu, &nqu, &pai->qu->vb, id, rrty, nrrty, |
933 | nflags, pai->now, &ctx); | |
ba1ddf08 | 934 | if (st) return st; |
935 | ||
26eb6bdc | 936 | return adns_s_ok; |
a1d2d0ed | 937 | } |
938 | ||
9c344a42 | 939 | static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, |
940 | int max, void *datap) { | |
26eb6bdc | 941 | adns_rr_hostaddr *rrp= datap; |
a1d2d0ed | 942 | adns_status st; |
a1d2d0ed | 943 | |
26eb6bdc | 944 | st= pap_hostaddr(pai, &cbyte, max, rrp); |
a1d2d0ed | 945 | if (st) return st; |
946 | if (cbyte != max) return adns_s_invaliddata; | |
947 | ||
26eb6bdc | 948 | return adns_s_ok; |
949 | } | |
a1d2d0ed | 950 | |
9c344a42 | 951 | static int dip_hostaddr(adns_state ads, |
952 | const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) { | |
26eb6bdc | 953 | if (ap->astatus != bp->astatus) return ap->astatus; |
954 | if (ap->astatus) return 0; | |
a1d2d0ed | 955 | |
9136cf0c | 956 | return dip_sockaddr(ads, &ap->addrs[0].addr.sa, &bp->addrs[0].addr.sa); |
26eb6bdc | 957 | } |
958 | ||
9c344a42 | 959 | static int di_hostaddr(adns_state ads, |
960 | const void *datap_a, const void *datap_b) { | |
26eb6bdc | 961 | const adns_rr_hostaddr *ap= datap_a, *bp= datap_b; |
962 | ||
8c3aa944 | 963 | return dip_hostaddr(ads, ap,bp); |
a1d2d0ed | 964 | } |
965 | ||
14180727 | 966 | static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) { |
967 | void *tablev; | |
5f8085b7 MW |
968 | size_t sz = qu->answer->type & adns__qtf_bigaddr ? |
969 | sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only); | |
14180727 | 970 | adns__makefinal_str(qu,&rrp->host); |
971 | tablev= rrp->addrs; | |
5f8085b7 | 972 | adns__makefinal_block(qu, &tablev, rrp->naddrs*sz); |
14180727 | 973 | rrp->addrs= tablev; |
f2ad23ee | 974 | } |
975 | ||
14180727 | 976 | static void mf_hostaddr(adns_query qu, void *datap) { |
977 | adns_rr_hostaddr *rrp= datap; | |
f2ad23ee | 978 | |
14180727 | 979 | mfp_hostaddr(qu,rrp); |
f2ad23ee | 980 | } |
981 | ||
26eb6bdc | 982 | static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) { |
0fb18816 | 983 | const char *errstr; |
26eb6bdc | 984 | adns_status st; |
9e50e3ac | 985 | char buf[20]; |
26eb6bdc | 986 | int i; |
987 | ||
0fb18816 | 988 | st= csp_domain(vb,rrp->host); if (st) return st; |
26eb6bdc | 989 | |
0872e289 | 990 | CSP_ADDSTR(" "); |
9e50e3ac | 991 | CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus)); |
992 | ||
993 | sprintf(buf," %d ",rrp->astatus); | |
994 | CSP_ADDSTR(buf); | |
0fb18816 | 995 | |
9e50e3ac | 996 | CSP_ADDSTR(adns_errabbrev(rrp->astatus)); |
0fb18816 | 997 | CSP_ADDSTR(" "); |
9e50e3ac | 998 | |
0fb18816 | 999 | errstr= adns_strerror(rrp->astatus); |
1000 | st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st; | |
0872e289 | 1001 | |
1002 | if (rrp->naddrs >= 0) { | |
1003 | CSP_ADDSTR(" ("); | |
1004 | for (i=0; i<rrp->naddrs; i++) { | |
1005 | CSP_ADDSTR(" "); | |
26eb6bdc | 1006 | st= csp_addr(vb,&rrp->addrs[i]); |
1007 | } | |
0872e289 | 1008 | CSP_ADDSTR(" )"); |
1009 | } else { | |
1010 | CSP_ADDSTR(" ?"); | |
26eb6bdc | 1011 | } |
1012 | return adns_s_ok; | |
1013 | } | |
1014 | ||
1015 | static adns_status cs_hostaddr(vbuf *vb, const void *datap) { | |
1016 | const adns_rr_hostaddr *rrp= datap; | |
1017 | ||
1018 | return csp_hostaddr(vb,rrp); | |
1019 | } | |
1020 | ||
14180727 | 1021 | /* |
1022 | * _mx_raw (pa,di) | |
1023 | */ | |
26eb6bdc | 1024 | |
9c344a42 | 1025 | static adns_status pa_mx_raw(const parseinfo *pai, int cbyte, |
1026 | int max, void *datap) { | |
14180727 | 1027 | const byte *dgram= pai->dgram; |
1028 | adns_rr_intstr *rrp= datap; | |
1029 | adns_status st; | |
1030 | int pref; | |
26eb6bdc | 1031 | |
14180727 | 1032 | if (cbyte+2 > max) return adns_s_invaliddata; |
1033 | GET_W(cbyte,pref); | |
1034 | rrp->i= pref; | |
1035 | st= pap_domain(pai, &cbyte, max, &rrp->str, | |
1036 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1037 | if (st) return st; | |
26eb6bdc | 1038 | |
14180727 | 1039 | if (cbyte != max) return adns_s_invaliddata; |
1040 | return adns_s_ok; | |
1041 | } | |
26eb6bdc | 1042 | |
8c3aa944 | 1043 | static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) { |
14180727 | 1044 | const adns_rr_intstr *ap= datap_a, *bp= datap_b; |
1045 | ||
1046 | if (ap->i < bp->i) return 0; | |
1047 | if (ap->i > bp->i) return 1; | |
1048 | return 0; | |
26eb6bdc | 1049 | } |
1050 | ||
14180727 | 1051 | /* |
1052 | * _mx (pa,di) | |
1053 | */ | |
26eb6bdc | 1054 | |
9c344a42 | 1055 | static adns_status pa_mx(const parseinfo *pai, int cbyte, |
1056 | int max, void *datap) { | |
14180727 | 1057 | const byte *dgram= pai->dgram; |
1058 | adns_rr_inthostaddr *rrp= datap; | |
1059 | adns_status st; | |
1060 | int pref; | |
1061 | ||
1062 | if (cbyte+2 > max) return adns_s_invaliddata; | |
1063 | GET_W(cbyte,pref); | |
1064 | rrp->i= pref; | |
1065 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); | |
1066 | if (st) return st; | |
1067 | ||
1068 | if (cbyte != max) return adns_s_invaliddata; | |
1069 | return adns_s_ok; | |
1070 | } | |
1071 | ||
8c3aa944 | 1072 | static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) { |
14180727 | 1073 | const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b; |
1074 | ||
1075 | if (ap->i < bp->i) return 0; | |
1076 | if (ap->i > bp->i) return 1; | |
8c3aa944 | 1077 | return dip_hostaddr(ads, &ap->ha, &bp->ha); |
26eb6bdc | 1078 | } |
1079 | ||
14180727 | 1080 | /* |
1081 | * _inthostaddr (mf,cs) | |
1082 | */ | |
1083 | ||
26eb6bdc | 1084 | static void mf_inthostaddr(adns_query qu, void *datap) { |
1085 | adns_rr_inthostaddr *rrp= datap; | |
1086 | ||
1087 | mfp_hostaddr(qu,&rrp->ha); | |
1088 | } | |
1089 | ||
14180727 | 1090 | static adns_status cs_inthostaddr(vbuf *vb, const void *datap) { |
1091 | const adns_rr_inthostaddr *rrp= datap; | |
1092 | char buf[10]; | |
f2ad23ee | 1093 | |
14180727 | 1094 | sprintf(buf,"%u ",rrp->i); |
1095 | CSP_ADDSTR(buf); | |
1096 | ||
1097 | return csp_hostaddr(vb,&rrp->ha); | |
cfdca685 | 1098 | } |
1099 | ||
0872e289 | 1100 | /* |
1101 | * _inthost (cs) | |
1102 | */ | |
1103 | ||
1104 | static adns_status cs_inthost(vbuf *vb, const void *datap) { | |
1105 | const adns_rr_intstr *rrp= datap; | |
1106 | char buf[10]; | |
1107 | ||
1108 | sprintf(buf,"%u ",rrp->i); | |
1109 | CSP_ADDSTR(buf); | |
1110 | return csp_domain(vb,rrp->str); | |
1111 | } | |
1112 | ||
cd1bde2f | 1113 | /* |
1114 | * _ptr (pa, +icb_ptr) | |
1115 | */ | |
1116 | ||
1117 | static void icb_ptr(adns_query parent, adns_query child) { | |
1118 | adns_answer *cans= child->answer; | |
8a53cf7f MW |
1119 | const union gen_addr *queried; |
1120 | const unsigned char *found; | |
cb32030b | 1121 | adns_state ads= parent->ads; |
cd1bde2f | 1122 | int i; |
1123 | ||
1124 | if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) { | |
1125 | adns__query_fail(parent,adns_s_inconsistent); | |
1126 | return; | |
1127 | } else if (cans->status) { | |
1128 | adns__query_fail(parent,cans->status); | |
1129 | return; | |
1130 | } | |
1131 | ||
8a53cf7f MW |
1132 | queried= &parent->ctx.info.ptr_parent_addr.addr; |
1133 | for (i=0, found=cans->rrs.bytes; i<cans->nrrs; i++, found += cans->rrsz) { | |
1134 | if (!memcmp(queried,found,cans->rrsz)) { | |
cb32030b | 1135 | if (!parent->children.head) { |
1136 | adns__query_done(parent); | |
1137 | return; | |
1138 | } else { | |
1139 | LIST_LINK_TAIL(ads->childw,parent); | |
1140 | return; | |
1141 | } | |
cd1bde2f | 1142 | } |
1143 | } | |
1144 | ||
1145 | adns__query_fail(parent,adns_s_inconsistent); | |
1146 | } | |
1147 | ||
9c344a42 | 1148 | static adns_status pa_ptr(const parseinfo *pai, int dmstart, |
1149 | int max, void *datap) { | |
8a53cf7f MW |
1150 | static const struct { |
1151 | const afinfo *ai; | |
1152 | const char *const tail[3]; | |
1153 | } expectdomain[] = { | |
1154 | { &adns__inet_afinfo, { DNS_INADDR_ARPA, 0 } }, | |
1155 | { &adns__inet6_afinfo, { DNS_IP6_ARPA, 0 } } | |
1156 | }; | |
1157 | enum { n_ed = sizeof(expectdomain)/sizeof(expectdomain[0]) }; | |
cd1bde2f | 1158 | |
1159 | char **rrp= datap; | |
1160 | adns_status st; | |
8a53cf7f | 1161 | struct afinfo_addr *ap; |
cd1bde2f | 1162 | findlabel_state fls; |
8a53cf7f MW |
1163 | byte ipv[n_ed][32]; |
1164 | int cbyte, i, j, foundj = -1, lablen, labstart, id, f, ac; | |
1165 | const char *tp; | |
cd1bde2f | 1166 | adns_query nqu; |
1167 | qcontext ctx; | |
1168 | ||
1169 | cbyte= dmstart; | |
1170 | st= pap_domain(pai, &cbyte, max, rrp, | |
1171 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1172 | if (st) return st; | |
1173 | if (cbyte != max) return adns_s_invaliddata; | |
1174 | ||
1175 | ap= &pai->qu->ctx.info.ptr_parent_addr; | |
8a53cf7f | 1176 | if (!ap->ai) { |
cd1bde2f | 1177 | adns__findlabel_start(&fls, pai->ads, -1, pai->qu, |
1178 | pai->qu->query_dgram, pai->qu->query_dglen, | |
1179 | pai->qu->query_dglen, DNS_HDRSIZE, 0); | |
8a53cf7f MW |
1180 | |
1181 | f = (1 << n_ed) - 1; /* superposition of address types */ | |
1182 | for (i = 0;; i++) { | |
cd1bde2f | 1183 | st= adns__findlabel_next(&fls,&lablen,&labstart); assert(!st); |
8a53cf7f MW |
1184 | if (lablen <= 0) break; |
1185 | for (j = 0; j < n_ed; j++) { | |
1186 | if (!(f & (1 << j))) continue; | |
1187 | if (i < expectdomain[j].ai->nrevcomp) { | |
1188 | ac = expectdomain[j].ai->rev_parsecomp( | |
1189 | pai->qu->query_dgram + labstart, lablen); | |
1190 | if (ac < 0) goto mismatch; | |
1191 | assert(i < sizeof(ipv[j])); | |
1192 | ipv[j][i] = ac; | |
1193 | } else { | |
1194 | tp = expectdomain[j].tail[i - expectdomain[j].ai->nrevcomp]; | |
1195 | if (!tp || | |
1196 | strncmp(pai->qu->query_dgram + labstart, tp, lablen) != 0 || | |
1197 | tp[lablen] != 0) | |
1198 | goto mismatch; | |
1199 | } | |
1200 | continue; | |
1201 | ||
1202 | mismatch: | |
1203 | f &= ~(1 << j); | |
1204 | if (!f) return adns_s_querydomainwrong; | |
1205 | } | |
cd1bde2f | 1206 | } |
8a53cf7f MW |
1207 | |
1208 | if (lablen < 0) return adns_s_querydomainwrong; | |
1209 | for (j = 0; j < n_ed; j++) { | |
1210 | if (!(f & (1 << j))) continue; | |
1211 | if (i >= expectdomain[j].ai->nrevcomp && | |
1212 | !expectdomain[j].tail[i - expectdomain[j].ai->nrevcomp]) | |
1213 | { foundj = j; continue; } | |
1214 | f &= ~(1 << j); | |
1215 | if (!f) return adns_s_querydomainwrong; | |
cd1bde2f | 1216 | } |
8a53cf7f MW |
1217 | assert(foundj >= 0 && f == (1 << foundj)); /* collapsed to a single type */ |
1218 | ||
1219 | ap->ai = expectdomain[foundj].ai; | |
1220 | ap->ai->rev_mkaddr(&ap->addr, ipv[foundj]); | |
cd1bde2f | 1221 | } |
1222 | ||
1223 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, | |
1224 | pai->dgram, pai->dglen, dmstart, | |
8a53cf7f | 1225 | ap->ai->rrtype, adns_qf_quoteok_query); |
cd1bde2f | 1226 | if (st) return st; |
1227 | ||
1228 | ctx.ext= 0; | |
1229 | ctx.callback= icb_ptr; | |
1230 | memset(&ctx.info,0,sizeof(ctx.info)); | |
8a53cf7f | 1231 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(ap->ai->rrtype), |
5f8085b7 | 1232 | ap->ai->rrtype, &pai->qu->vb, id, |
7e6a84a1 | 1233 | adns_qf_quoteok_query, pai->now, &ctx); |
cd1bde2f | 1234 | if (st) return st; |
1235 | ||
1236 | nqu->parent= pai->qu; | |
1237 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); | |
cd1bde2f | 1238 | return adns_s_ok; |
1239 | } | |
1240 | ||
61093792 | 1241 | /* |
0872e289 | 1242 | * _strpair (mf) |
61093792 | 1243 | */ |
1244 | ||
1245 | static void mf_strpair(adns_query qu, void *datap) { | |
1246 | adns_rr_strpair *rrp= datap; | |
1247 | ||
1248 | adns__makefinal_str(qu,&rrp->array[0]); | |
1249 | adns__makefinal_str(qu,&rrp->array[1]); | |
1250 | } | |
1251 | ||
61093792 | 1252 | /* |
0872e289 | 1253 | * _intstrpair (mf) |
61093792 | 1254 | */ |
1255 | ||
1256 | static void mf_intstrpair(adns_query qu, void *datap) { | |
1257 | adns_rr_intstrpair *rrp= datap; | |
1258 | ||
1259 | adns__makefinal_str(qu,&rrp->array[0].str); | |
1260 | adns__makefinal_str(qu,&rrp->array[1].str); | |
1261 | } | |
1262 | ||
61093792 | 1263 | /* |
1264 | * _hinfo (pa) | |
1265 | */ | |
1266 | ||
9c344a42 | 1267 | static adns_status pa_hinfo(const parseinfo *pai, int cbyte, |
1268 | int max, void *datap) { | |
61093792 | 1269 | adns_rr_intstrpair *rrp= datap; |
1270 | adns_status st; | |
1271 | int i; | |
1272 | ||
1273 | for (i=0; i<2; i++) { | |
0872e289 | 1274 | st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str); |
61093792 | 1275 | if (st) return st; |
1276 | } | |
1277 | ||
1278 | if (cbyte != max) return adns_s_invaliddata; | |
1279 | ||
1280 | return adns_s_ok; | |
1281 | } | |
1282 | ||
1283 | /* | |
0872e289 | 1284 | * _mailbox (pap,cs) |
61093792 | 1285 | */ |
1286 | ||
9c344a42 | 1287 | static adns_status pap_mailbox822(const parseinfo *pai, |
1288 | int *cbyte_io, int max, char **mb_r) { | |
6f2c243f | 1289 | int lablen, labstart, i, needquote, c, r, neednorm; |
1290 | const unsigned char *p; | |
1291 | char *str; | |
1292 | findlabel_state fls; | |
1293 | adns_status st; | |
1294 | vbuf *vb; | |
1295 | ||
1296 | vb= &pai->qu->vb; | |
1297 | vb->used= 0; | |
1298 | adns__findlabel_start(&fls, pai->ads, | |
1299 | -1, pai->qu, | |
1300 | pai->dgram, pai->dglen, max, | |
1301 | *cbyte_io, cbyte_io); | |
1302 | st= adns__findlabel_next(&fls,&lablen,&labstart); | |
1303 | if (!lablen) { | |
0872e289 | 1304 | adns__vbuf_appendstr(vb,"."); |
6f2c243f | 1305 | goto x_ok; |
1306 | } | |
1307 | ||
1308 | neednorm= 1; | |
1309 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) { | |
1310 | c= *p++; | |
1311 | if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata; | |
1312 | if (c == '.' && !neednorm) neednorm= 1; | |
67ca39c8 | 1313 | else if (c==' ' || c>=127 || ctype_822special(c)) needquote++; |
6f2c243f | 1314 | else neednorm= 0; |
1315 | } | |
1316 | ||
1317 | if (needquote || neednorm) { | |
1318 | r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM; | |
1319 | adns__vbuf_appendq(vb,"\"",1); | |
1320 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) { | |
1321 | c= *p; | |
0872e289 | 1322 | if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1); |
6f2c243f | 1323 | adns__vbuf_appendq(vb,p,1); |
1324 | } | |
1325 | adns__vbuf_appendq(vb,"\"",1); | |
1326 | } else { | |
1327 | r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM; | |
1328 | } | |
1329 | ||
1330 | r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM; | |
1331 | ||
1332 | st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram); | |
1333 | if (st) return st; | |
1334 | ||
1335 | x_ok: | |
1336 | str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM; | |
1337 | memcpy(str,vb->buf,vb->used); | |
1338 | str[vb->used]= 0; | |
1339 | *mb_r= str; | |
1340 | return adns_s_ok; | |
61093792 | 1341 | } |
1342 | ||
c2875680 | 1343 | static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max, |
1344 | char **mb_r) { | |
7d0aaee4 | 1345 | if (pai->qu->typei->typekey & adns__qtf_mail822) { |
c2875680 | 1346 | return pap_mailbox822(pai, cbyte_io, max, mb_r); |
1347 | } else { | |
0872e289 | 1348 | return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok); |
c2875680 | 1349 | } |
1350 | } | |
1351 | ||
0872e289 | 1352 | static adns_status csp_mailbox(vbuf *vb, const char *mailbox) { |
1353 | return csp_domain(vb,mailbox); | |
1354 | } | |
1355 | ||
61093792 | 1356 | /* |
0872e289 | 1357 | * _rp (pa,cs) |
61093792 | 1358 | */ |
1359 | ||
9c344a42 | 1360 | static adns_status pa_rp(const parseinfo *pai, int cbyte, |
1361 | int max, void *datap) { | |
61093792 | 1362 | adns_rr_strpair *rrp= datap; |
1363 | adns_status st; | |
1364 | ||
1365 | st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]); | |
1366 | if (st) return st; | |
1367 | ||
1368 | st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok); | |
1369 | if (st) return st; | |
1370 | ||
1371 | if (cbyte != max) return adns_s_invaliddata; | |
1372 | return adns_s_ok; | |
1373 | } | |
1374 | ||
0872e289 | 1375 | static adns_status cs_rp(vbuf *vb, const void *datap) { |
1376 | const adns_rr_strpair *rrp= datap; | |
1377 | adns_status st; | |
1378 | ||
1379 | st= csp_mailbox(vb,rrp->array[0]); if (st) return st; | |
1380 | CSP_ADDSTR(" "); | |
1381 | st= csp_domain(vb,rrp->array[1]); if (st) return st; | |
1382 | ||
1383 | return adns_s_ok; | |
1384 | } | |
1385 | ||
61093792 | 1386 | /* |
1387 | * _soa (pa,mf,cs) | |
1388 | */ | |
1389 | ||
9c344a42 | 1390 | static adns_status pa_soa(const parseinfo *pai, int cbyte, |
1391 | int max, void *datap) { | |
61093792 | 1392 | adns_rr_soa *rrp= datap; |
1393 | const byte *dgram= pai->dgram; | |
1394 | adns_status st; | |
1395 | int msw, lsw, i; | |
1396 | ||
1397 | st= pap_domain(pai, &cbyte, max, &rrp->mname, | |
1398 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1399 | if (st) return st; | |
1400 | ||
1401 | st= pap_mailbox(pai, &cbyte, max, &rrp->rname); | |
1402 | if (st) return st; | |
1403 | ||
1404 | if (cbyte+20 != max) return adns_s_invaliddata; | |
1405 | ||
1406 | for (i=0; i<5; i++) { | |
1407 | GET_W(cbyte,msw); | |
1408 | GET_W(cbyte,lsw); | |
1409 | (&rrp->serial)[i]= (msw<<16) | lsw; | |
1410 | } | |
1411 | ||
1412 | return adns_s_ok; | |
1413 | } | |
1414 | ||
1415 | static void mf_soa(adns_query qu, void *datap) { | |
1416 | adns_rr_soa *rrp= datap; | |
1417 | ||
1418 | adns__makefinal_str(qu,&rrp->mname); | |
1419 | adns__makefinal_str(qu,&rrp->rname); | |
1420 | } | |
1421 | ||
1422 | static adns_status cs_soa(vbuf *vb, const void *datap) { | |
1423 | const adns_rr_soa *rrp= datap; | |
1424 | char buf[20]; | |
1425 | int i; | |
1426 | adns_status st; | |
1427 | ||
0872e289 | 1428 | st= csp_domain(vb,rrp->mname); if (st) return st; |
61093792 | 1429 | CSP_ADDSTR(" "); |
0872e289 | 1430 | st= csp_mailbox(vb,rrp->rname); if (st) return st; |
61093792 | 1431 | |
1432 | for (i=0; i<5; i++) { | |
1433 | sprintf(buf," %lu",(&rrp->serial)[i]); | |
1434 | CSP_ADDSTR(buf); | |
1435 | } | |
1436 | ||
1437 | return adns_s_ok; | |
1438 | } | |
1439 | ||
bddb4c18 | 1440 | /* |
59d05d1c | 1441 | * _srv* (pa*2,di,cs*2,qdpl,postsort) |
bddb4c18 | 1442 | */ |
1443 | ||
1444 | static adns_status qdpl_srv(adns_state ads, | |
1445 | const char **p_io, const char *pe, int labelnum, | |
1446 | char label_r[DNS_MAXDOMAIN], int *ll_io, | |
1447 | adns_queryflags flags, | |
1448 | const typeinfo *typei) { | |
1449 | int useflags; | |
1450 | const char *p_orig; | |
1451 | adns_status st; | |
1452 | ||
1453 | if (labelnum < 2 && !(flags & adns_qf_quoteok_query)) { | |
1454 | useflags= adns_qf_quoteok_query; | |
1455 | p_orig= *p_io; | |
1456 | } else { | |
1457 | useflags= flags; | |
1458 | p_orig= 0; | |
1459 | } | |
1460 | st= adns__qdpl_normal(ads, p_io,pe, labelnum,label_r, ll_io, useflags,typei); | |
1461 | if (st) return st; | |
1462 | ||
1463 | if (p_orig) { | |
1464 | int ll= *ll_io; | |
1465 | if (!ll || label_r[0]!='_') | |
1466 | return adns_s_querydomaininvalid; | |
1467 | if (memchr(p_orig+1, '\\', pe - (p_orig+1))) | |
1468 | return adns_s_querydomaininvalid; | |
1469 | } | |
1470 | return adns_s_ok; | |
1471 | } | |
1472 | ||
7602bb91 | 1473 | static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max, |
375c6c48 | 1474 | adns_rr_srvha *rrp |
1475 | /* might be adns_rr_srvraw* */) { | |
2248cdf4 | 1476 | const byte *dgram= pai->dgram; |
7602bb91 | 1477 | int ti, cbyte; |
1478 | ||
1479 | cbyte= *cbyte_io; | |
1480 | if ((*cbyte_io += 6) > max) return adns_s_invaliddata; | |
2248cdf4 | 1481 | |
1482 | rrp->priority= GET_W(cbyte, ti); | |
1483 | rrp->weight= GET_W(cbyte, ti); | |
1484 | rrp->port= GET_W(cbyte, ti); | |
1485 | return adns_s_ok; | |
1486 | } | |
1487 | ||
1488 | static adns_status pa_srvraw(const parseinfo *pai, int cbyte, | |
1489 | int max, void *datap) { | |
1490 | adns_rr_srvraw *rrp= datap; | |
1491 | adns_status st; | |
1492 | ||
7602bb91 | 1493 | st= pap_srv_begin(pai,&cbyte,max,datap); |
2248cdf4 | 1494 | if (st) return st; |
1495 | ||
1496 | st= pap_domain(pai, &cbyte, max, &rrp->host, | |
1497 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1498 | if (st) return st; | |
1499 | ||
1500 | if (cbyte != max) return adns_s_invaliddata; | |
1501 | return adns_s_ok; | |
1502 | } | |
1503 | ||
1504 | static adns_status pa_srvha(const parseinfo *pai, int cbyte, | |
1505 | int max, void *datap) { | |
1506 | adns_rr_srvha *rrp= datap; | |
1507 | adns_status st; | |
1508 | ||
7602bb91 | 1509 | st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st; |
2248cdf4 | 1510 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st; |
1511 | if (cbyte != max) return adns_s_invaliddata; | |
1512 | return adns_s_ok; | |
1513 | } | |
1514 | ||
1515 | static void mf_srvraw(adns_query qu, void *datap) { | |
1516 | adns_rr_srvraw *rrp= datap; | |
1517 | adns__makefinal_str(qu, &rrp->host); | |
1518 | } | |
1519 | ||
1520 | static void mf_srvha(adns_query qu, void *datap) { | |
1521 | adns_rr_srvha *rrp= datap; | |
1522 | mfp_hostaddr(qu,&rrp->ha); | |
1523 | } | |
1524 | ||
1525 | static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) { | |
1526 | const adns_rr_srvraw *ap= datap_a, *bp= datap_b; | |
1527 | /* might be const adns_rr_svhostaddr* */ | |
1528 | ||
1529 | if (ap->priority < bp->priority) return 0; | |
1530 | if (ap->priority > bp->priority) return 1; | |
1531 | return 0; | |
1532 | } | |
1533 | ||
375c6c48 | 1534 | static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp |
1535 | /* might be adns_rr_srvraw* */) { | |
2248cdf4 | 1536 | char buf[30]; |
1537 | sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port); | |
1538 | CSP_ADDSTR(buf); | |
1539 | return adns_s_ok; | |
1540 | } | |
1541 | ||
1542 | static adns_status cs_srvraw(vbuf *vb, const void *datap) { | |
1543 | const adns_rr_srvraw *rrp= datap; | |
1544 | adns_status st; | |
1545 | ||
375c6c48 | 1546 | st= csp_srv_begin(vb,(const void*)rrp); if (st) return st; |
2248cdf4 | 1547 | return csp_domain(vb,rrp->host); |
1548 | } | |
1549 | ||
1550 | static adns_status cs_srvha(vbuf *vb, const void *datap) { | |
1551 | const adns_rr_srvha *rrp= datap; | |
1552 | adns_status st; | |
1553 | ||
375c6c48 | 1554 | st= csp_srv_begin(vb,(const void*)datap); if (st) return st; |
2248cdf4 | 1555 | return csp_hostaddr(vb,&rrp->ha); |
1556 | } | |
1557 | ||
375c6c48 | 1558 | static void postsort_srv(adns_state ads, void *array, int nrrs, |
59d05d1c | 1559 | const struct typeinfo *typei) { |
375c6c48 | 1560 | /* we treat everything in the array as if it were an adns_rr_srvha |
1561 | * even though the array might be of adns_rr_srvraw. That's OK | |
1562 | * because they have the same prefix, which is all we access. | |
1563 | * We use typei->rrsz, too, rather than naive array indexing, of course. | |
1564 | */ | |
1565 | char *workbegin, *workend, *search, *arrayend; | |
1566 | const adns_rr_srvha *rr; | |
1567 | union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp; | |
1568 | int cpriority, totalweight, runtotal; | |
1569 | long randval; | |
1570 | ||
1571 | for (workbegin= array, arrayend= workbegin + typei->rrsz * nrrs; | |
1572 | workbegin < arrayend; | |
1573 | workbegin= workend) { | |
1574 | cpriority= (rr=(void*)workbegin)->priority; | |
1575 | ||
1576 | for (workend= workbegin, totalweight= 0; | |
1577 | workend < arrayend && (rr=(void*)workend)->priority == cpriority; | |
1578 | workend += typei->rrsz) { | |
1579 | totalweight += rr->weight; | |
375c6c48 | 1580 | } |
1581 | ||
1582 | /* Now workbegin..(workend-1) incl. are exactly all of the RRs of | |
1583 | * cpriority. From now on, workbegin points to the `remaining' | |
1584 | * records: we select one record at a time (RFC2782 `Usage rules' | |
1585 | * and `Format of the SRV RR' subsection `Weight') to place at | |
1586 | * workbegin (swapping with the one that was there, and then | |
1587 | * advance workbegin. */ | |
1588 | for (; | |
1589 | workbegin + typei->rrsz < workend; /* don't bother if just one */ | |
1590 | workbegin += typei->rrsz) { | |
1591 | ||
1592 | randval= nrand48(ads->rand48xsubi); | |
1593 | randval %= (totalweight + 1); | |
375c6c48 | 1594 | /* makes it into 0..totalweight inclusive; with 2^10 RRs, |
1595 | * totalweight must be <= 2^26 so probability nonuniformity is | |
1596 | * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie | |
1597 | * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5). | |
1598 | */ | |
1599 | ||
1600 | for (search=workbegin, runtotal=0; | |
1601 | (runtotal += (rr=(void*)search)->weight) < randval; | |
1602 | search += typei->rrsz); | |
375c6c48 | 1603 | assert(search < arrayend); |
1604 | totalweight -= rr->weight; | |
1605 | if (search != workbegin) { | |
1606 | memcpy(&rrtmp, workbegin, typei->rrsz); | |
1607 | memcpy(workbegin, search, typei->rrsz); | |
1608 | memcpy(search, &rrtmp, typei->rrsz); | |
1609 | } | |
1610 | } | |
1611 | } | |
59d05d1c | 1612 | /* tests: |
1613 | * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk. | |
1614 | * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk. | |
1615 | * ./adnshost_s -t srv- _jabber._tcp.jabber.org | |
1616 | */ | |
1617 | } | |
1618 | ||
7d0aaee4 | 1619 | /* |
1620 | * _byteblock (mf) | |
1621 | */ | |
1622 | ||
1623 | static void mf_byteblock(adns_query qu, void *datap) { | |
1624 | adns_rr_byteblock *rrp= datap; | |
1625 | void *bytes= rrp->data; | |
1626 | adns__makefinal_block(qu,&bytes,rrp->len); | |
1627 | rrp->data= bytes; | |
1628 | } | |
1629 | ||
1630 | /* | |
1631 | * _opaque (pa,cs) | |
1632 | */ | |
1633 | ||
1634 | static adns_status pa_opaque(const parseinfo *pai, int cbyte, | |
1635 | int max, void *datap) { | |
1636 | adns_rr_byteblock *rrp= datap; | |
1637 | ||
1638 | rrp->len= max - cbyte; | |
1639 | rrp->data= adns__alloc_interim(pai->qu, rrp->len); | |
1640 | if (!rrp->data) R_NOMEM; | |
1641 | memcpy(rrp->data, pai->dgram + cbyte, rrp->len); | |
1642 | return adns_s_ok; | |
1643 | } | |
1644 | ||
1645 | static adns_status cs_opaque(vbuf *vb, const void *datap) { | |
1646 | const adns_rr_byteblock *rrp= datap; | |
1647 | char buf[10]; | |
1648 | int l; | |
1649 | unsigned char *p; | |
1650 | ||
1651 | sprintf(buf,"\\# %d",rrp->len); | |
1652 | CSP_ADDSTR(buf); | |
1653 | ||
1654 | for (l= rrp->len, p= rrp->data; | |
1655 | l>=4; | |
1656 | l -= 4, p += 4) { | |
1657 | sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]); | |
1658 | CSP_ADDSTR(buf); | |
1659 | } | |
1660 | for (; | |
1661 | l>0; | |
1662 | l--, p++) { | |
1663 | sprintf(buf," %02x",*p); | |
1664 | CSP_ADDSTR(buf); | |
1665 | } | |
1666 | return adns_s_ok; | |
1667 | } | |
1668 | ||
14180727 | 1669 | /* |
1670 | * _flat (mf) | |
1671 | */ | |
1672 | ||
cfdca685 | 1673 | static void mf_flat(adns_query qu, void *data) { } |
1674 | ||
14180727 | 1675 | /* |
1676 | * Now the table. | |
1677 | */ | |
1678 | ||
f2ad23ee | 1679 | #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member)) |
1e9efa71 | 1680 | |
cfdca685 | 1681 | #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb |
1682 | #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb | |
5c596e4d | 1683 | |
bddb4c18 | 1684 | #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \ |
5f8085b7 MW |
1685 | { adns_r_##code & adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), \ |
1686 | mf_##memb, printer,parser,comparer, adns__qdpl_normal,0,0 } | |
bddb4c18 | 1687 | #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,printer) \ |
5f8085b7 MW |
1688 | { adns_r_##code & adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), \ |
1689 | mf_flat, printer,parser,comparer, adns__qdpl_normal,0,0 } | |
1690 | #define XTRA_TYPE(code,rrt,fmt,memb,parser,comparer,printer, \ | |
1691 | makefinal,qdpl,postsort,sender) \ | |
1692 | { adns_r_##code & adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), makefinal, \ | |
1693 | printer,parser,comparer,qdpl,postsort,sender } | |
5c596e4d | 1694 | |
1695 | static const typeinfo typeinfos[] = { | |
14180727 | 1696 | /* Must be in ascending order of rrtype ! */ |
9c344a42 | 1697 | /* mem-mgmt code rrt fmt member parser comparer printer */ |
1698 | ||
1699 | FLAT_TYPE(a, "A", 0, inaddr, pa_inaddr, di_inaddr,cs_inaddr ), | |
1700 | DEEP_TYPE(ns_raw, "NS", "raw",str, pa_host_raw,0, cs_domain ), | |
1701 | DEEP_TYPE(cname, "CNAME", 0, str, pa_dom_raw, 0, cs_domain ), | |
1702 | DEEP_TYPE(soa_raw,"SOA", "raw",soa, pa_soa, 0, cs_soa ), | |
1703 | DEEP_TYPE(ptr_raw,"PTR", "raw",str, pa_host_raw,0, cs_domain ), | |
1704 | DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,pa_hinfo, 0, cs_hinfo ), | |
1705 | DEEP_TYPE(mx_raw, "MX", "raw",intstr, pa_mx_raw, di_mx_raw,cs_inthost ), | |
1706 | DEEP_TYPE(txt, "TXT", 0, manyistr,pa_txt, 0, cs_txt ), | |
1707 | DEEP_TYPE(rp_raw, "RP", "raw",strpair, pa_rp, 0, cs_rp ), | |
9136cf0c | 1708 | FLAT_TYPE(aaaa, "AAAA", 0, in6addr, pa_in6addr, di_in6addr,cs_in6addr ), |
59d05d1c | 1709 | XTRA_TYPE(srv_raw,"SRV", "raw",srvraw , pa_srvraw, di_srv, cs_srvraw, |
5f8085b7 | 1710 | mf_srvraw, qdpl_srv, postsort_srv, 0), |
9c344a42 | 1711 | |
5f8085b7 MW |
1712 | XTRA_TYPE(addr, "A", "addr", addr, pa_addr, di_addr, cs_addr, |
1713 | mf_flat, adns__qdpl_normal, 0, qs_addr), | |
9c344a42 | 1714 | DEEP_TYPE(ns, "NS", "+addr",hostaddr,pa_hostaddr,di_hostaddr,cs_hostaddr ), |
1715 | DEEP_TYPE(ptr, "PTR","checked",str, pa_ptr, 0, cs_domain ), | |
1716 | DEEP_TYPE(mx, "MX", "+addr",inthostaddr,pa_mx, di_mx, cs_inthostaddr), | |
59d05d1c | 1717 | XTRA_TYPE(srv, "SRV","+addr",srvha, pa_srvha, di_srv, cs_srvha, |
5f8085b7 | 1718 | mf_srvha, qdpl_srv, postsort_srv, 0), |
bddb4c18 | 1719 | |
9c344a42 | 1720 | DEEP_TYPE(soa, "SOA","822", soa, pa_soa, 0, cs_soa ), |
1721 | DEEP_TYPE(rp, "RP", "822", strpair, pa_rp, 0, cs_rp ), | |
5c596e4d | 1722 | }; |
1723 | ||
7d0aaee4 | 1724 | static const typeinfo typeinfo_unknown= |
1725 | DEEP_TYPE(unknown,0, "unknown",byteblock,pa_opaque, 0, cs_opaque ); | |
1726 | ||
c9afe7bb | 1727 | const typeinfo *adns__findtype(adns_rrtype type) { |
1728 | const typeinfo *begin, *end, *mid; | |
5c596e4d | 1729 | |
7d0aaee4 | 1730 | if (type & adns_r_unknown) return &typeinfo_unknown; |
5f8085b7 | 1731 | type &= adns_rrt_reprmask; |
7d0aaee4 | 1732 | |
5c596e4d | 1733 | begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo)); |
1734 | ||
1735 | while (begin < end) { | |
1736 | mid= begin + ((end-begin)>>1); | |
7d0aaee4 | 1737 | if (mid->typekey == type) return mid; |
1738 | if (type > mid->typekey) begin= mid+1; | |
5c596e4d | 1739 | else end= mid; |
1740 | } | |
1741 | return 0; | |
1742 | } |