Commit | Line | Data |
---|---|---|
e576be50 | 1 | /* |
2 | * types.c | |
3 | * - RR-type-specific code, and the machinery to call it | |
4 | */ | |
5 | /* | |
ae8cc977 | 6 | * This file is part of adns, which is |
7 | * Copyright (C) 1997-2000,2003,2006 Ian Jackson | |
8 | * Copyright (C) 1999-2000,2003,2006 Tony Finch | |
9 | * Copyright (C) 1991 Massachusetts Institute of Technology | |
10 | * (See the file INSTALL for full details.) | |
e576be50 | 11 | * |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software Foundation, | |
24 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
25 | */ | |
98a3f706 | 26 | |
908dbcfa | 27 | #include <stddef.h> |
1b644113 | 28 | #include <stdlib.h> |
29 | ||
0f091044 | 30 | #include <sys/types.h> |
71a6ff46 | 31 | #include <sys/socket.h> |
32 | #include <netinet/in.h> | |
86e7b8d9 | 33 | #include <arpa/inet.h> |
34 | ||
98a3f706 | 35 | #include "internal.h" |
36 | ||
609133ee | 37 | #define R_NOMEM return adns_s_nomemory |
38 | #define CSP_ADDSTR(s) do { \ | |
39 | if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; \ | |
40 | } while (0) | |
1dfe95d8 | 41 | |
eb81d633 | 42 | /* |
43 | * order of sections: | |
44 | * | |
9ec44266 | 45 | * _string (pap) |
eb81d633 | 46 | * _textdata, _qstring (csp) |
47 | * _str (mf,cs) | |
9ec44266 | 48 | * _intstr (mf,csp,cs) |
eb81d633 | 49 | * _manyistr (mf,cs) |
50 | * _txt (pa) | |
b0e8338a MW |
51 | * _inaddr (pa,di,cs |
52 | * +search_sortlist, dip_genaddr, csp_genaddr) | |
50e2b0c3 | 53 | * _in6addr (pa,di,cs) |
908dbcfa | 54 | * _addr (pap,pa,di,div,csp,cs,gsz,qs |
2ca5496d MW |
55 | * +search_sortlist_sa, dip_sockaddr, |
56 | * addr_rrtypes, addr_submit, icb_addr) | |
382b81f7 MW |
57 | * _domain (pap,csp,cs) |
58 | * _dom_raw (pa) | |
eb81d633 | 59 | * _host_raw (pa) |
382b81f7 MW |
60 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs |
61 | * +pap_findaddrs, icb_hostaddr) | |
eb81d633 | 62 | * _mx_raw (pa,di) |
63 | * _mx (pa,di) | |
64 | * _inthostaddr (mf,cs) | |
382b81f7 | 65 | * _inthost (cs) |
938b0228 | 66 | * _ptr (ckl,pa +icb_ptr) |
382b81f7 MW |
67 | * _strpair (mf) |
68 | * _intstrpair (mf) | |
9ec44266 | 69 | * _hinfo (pa) |
382b81f7 MW |
70 | * _mailbox (pap,csp +pap_mailbox822) |
71 | * _rp (pa,cs) | |
9ec44266 | 72 | * _soa (pa,mf,cs) |
e8e5aeac | 73 | * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort) |
2c6eb096 | 74 | * _byteblock (mf) |
75 | * _opaque (pa,cs) | |
eb81d633 | 76 | * _flat (mf) |
77 | * | |
78 | * within each section: | |
e8e5aeac | 79 | * ckl_* |
eb81d633 | 80 | * pap_* |
81 | * pa_* | |
82 | * dip_* | |
83 | * di_* | |
84 | * mfp_* | |
85 | * mf_* | |
86 | * csp_* | |
87 | * cs_* | |
b0a32b17 | 88 | * gsz_* |
d24e2a7e | 89 | * postsort_* |
13826233 | 90 | * qs_* |
eb81d633 | 91 | */ |
92 | ||
93 | /* | |
b365d68a | 94 | * _qstring (pap,csp) |
eb81d633 | 95 | */ |
96 | ||
b365d68a | 97 | static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max, |
9ec44266 | 98 | int *len_r, char **str_r) { |
99 | /* Neither len_r nor str_r may be null. | |
100 | * End of datagram (overrun) is indicated by returning adns_s_invaliddata; | |
101 | */ | |
102 | const byte *dgram= pai->dgram; | |
103 | int l, cbyte; | |
104 | char *str; | |
105 | ||
106 | cbyte= *cbyte_io; | |
107 | ||
108 | if (cbyte >= max) return adns_s_invaliddata; | |
109 | GET_B(cbyte,l); | |
110 | if (cbyte+l > max) return adns_s_invaliddata; | |
111 | ||
112 | str= adns__alloc_interim(pai->qu, l+1); | |
113 | if (!str) R_NOMEM; | |
114 | ||
115 | str[l]= 0; | |
116 | memcpy(str,dgram+cbyte,l); | |
117 | ||
118 | *len_r= l; | |
119 | *str_r= str; | |
120 | *cbyte_io= cbyte+l; | |
121 | ||
122 | return adns_s_ok; | |
123 | } | |
124 | ||
b365d68a | 125 | static adns_status csp_qstring(vbuf *vb, const char *dp, int len) { |
eb81d633 | 126 | unsigned char ch; |
127 | char buf[10]; | |
128 | int cn; | |
129 | ||
130 | CSP_ADDSTR("\""); | |
131 | for (cn=0; cn<len; cn++) { | |
132 | ch= *dp++; | |
b365d68a | 133 | if (ch == '\\') { |
9ec44266 | 134 | CSP_ADDSTR("\\\\"); |
b365d68a | 135 | } else if (ch == '"') { |
136 | CSP_ADDSTR("\\\""); | |
137 | } else if (ch >= 32 && ch <= 126) { | |
138 | if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM; | |
eb81d633 | 139 | } else { |
9ec44266 | 140 | sprintf(buf,"\\x%02x",ch); |
eb81d633 | 141 | CSP_ADDSTR(buf); |
142 | } | |
143 | } | |
144 | CSP_ADDSTR("\""); | |
145 | ||
146 | return adns_s_ok; | |
147 | } | |
148 | ||
eb81d633 | 149 | /* |
b365d68a | 150 | * _str (mf) |
eb81d633 | 151 | */ |
152 | ||
153 | static void mf_str(adns_query qu, void *datap) { | |
154 | char **rrp= datap; | |
155 | ||
156 | adns__makefinal_str(qu,rrp); | |
157 | } | |
158 | ||
eb81d633 | 159 | /* |
b365d68a | 160 | * _intstr (mf) |
eb81d633 | 161 | */ |
162 | ||
163 | static void mf_intstr(adns_query qu, void *datap) { | |
164 | adns_rr_intstr *rrp= datap; | |
165 | ||
166 | adns__makefinal_str(qu,&rrp->str); | |
167 | } | |
168 | ||
eb81d633 | 169 | /* |
b365d68a | 170 | * _manyistr (mf) |
eb81d633 | 171 | */ |
172 | ||
173 | static void mf_manyistr(adns_query qu, void *datap) { | |
174 | adns_rr_intstr **rrp= datap; | |
175 | adns_rr_intstr *te, *table; | |
176 | void *tablev; | |
177 | int tc; | |
178 | ||
179 | for (tc=0, te= *rrp; te->i >= 0; te++, tc++); | |
180 | tablev= *rrp; | |
181 | adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1)); | |
182 | *rrp= table= tablev; | |
183 | for (te= *rrp; te->i >= 0; te++) | |
184 | adns__makefinal_str(qu,&te->str); | |
185 | } | |
186 | ||
eb81d633 | 187 | /* |
b365d68a | 188 | * _txt (pa,cs) |
eb81d633 | 189 | */ |
190 | ||
609133ee | 191 | static adns_status pa_txt(const parseinfo *pai, int cbyte, |
192 | int max, void *datap) { | |
eb81d633 | 193 | adns_rr_intstr **rrp= datap, *table, *te; |
194 | const byte *dgram= pai->dgram; | |
195 | int ti, tc, l, startbyte; | |
9ec44266 | 196 | adns_status st; |
eb81d633 | 197 | |
198 | startbyte= cbyte; | |
199 | if (cbyte >= max) return adns_s_invaliddata; | |
200 | tc= 0; | |
201 | while (cbyte < max) { | |
202 | GET_B(cbyte,l); | |
203 | cbyte+= l; | |
9ec44266 | 204 | tc++; |
eb81d633 | 205 | } |
b365d68a | 206 | if (cbyte != max || !tc) return adns_s_invaliddata; |
eb81d633 | 207 | |
208 | table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1)); | |
209 | if (!table) R_NOMEM; | |
210 | ||
211 | for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) { | |
b365d68a | 212 | st= pap_qstring(pai, &cbyte, max, &te->i, &te->str); |
9ec44266 | 213 | if (st) return st; |
eb81d633 | 214 | } |
215 | assert(cbyte == max); | |
216 | ||
217 | te->i= -1; | |
218 | te->str= 0; | |
219 | ||
220 | *rrp= table; | |
221 | return adns_s_ok; | |
828d89bd | 222 | } |
223 | ||
b365d68a | 224 | static adns_status cs_txt(vbuf *vb, const void *datap) { |
225 | const adns_rr_intstr *const *rrp= datap; | |
226 | const adns_rr_intstr *current; | |
227 | adns_status st; | |
228 | int spc; | |
229 | ||
230 | for (current= *rrp, spc=0; current->i >= 0; current++, spc=1) { | |
231 | if (spc) CSP_ADDSTR(" "); | |
232 | st= csp_qstring(vb,current->str,current->i); if (st) return st; | |
233 | } | |
234 | return adns_s_ok; | |
235 | } | |
236 | ||
237 | /* | |
238 | * _hinfo (cs) | |
239 | */ | |
240 | ||
241 | static adns_status cs_hinfo(vbuf *vb, const void *datap) { | |
242 | const adns_rr_intstrpair *rrp= datap; | |
243 | adns_status st; | |
244 | ||
245 | st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i); if (st) return st; | |
246 | CSP_ADDSTR(" "); | |
247 | st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i); if (st) return st; | |
248 | return adns_s_ok; | |
249 | } | |
250 | ||
eb81d633 | 251 | /* |
b0e8338a | 252 | * _inaddr (pa,di,cs +search_sortlist, dip_genaddr, csp_genaddr) |
eb81d633 | 253 | */ |
254 | ||
609133ee | 255 | static adns_status pa_inaddr(const parseinfo *pai, int cbyte, |
256 | int max, void *datap) { | |
e062dcae | 257 | struct in_addr *storeto= datap; |
e7a9ca47 | 258 | |
259 | if (max-cbyte != 4) return adns_s_invaliddata; | |
1dfe95d8 | 260 | memcpy(storeto, pai->dgram + cbyte, 4); |
e7a9ca47 | 261 | return adns_s_ok; |
262 | } | |
263 | ||
f930c455 | 264 | static int search_sortlist(adns_state ads, int af, const void *ad) { |
09957b1c | 265 | const struct sortlist *slp; |
477b9c0b MW |
266 | const struct in6_addr *a6; |
267 | union gen_addr a; | |
09957b1c | 268 | int i; |
477b9c0b MW |
269 | int v6mappedp= 0; |
270 | ||
271 | if (af == AF_INET6) { | |
272 | a6= ad; | |
273 | if (IN6_IS_ADDR_V4MAPPED(a6)) { | |
274 | a.v4.s_addr= htonl(((unsigned long)a6->s6_addr[12] << 24) | | |
275 | ((unsigned long)a6->s6_addr[13] << 16) | | |
276 | ((unsigned long)a6->s6_addr[14] << 8) | | |
277 | ((unsigned long)a6->s6_addr[15] << 0)); | |
278 | v6mappedp= 1; | |
279 | } | |
280 | } | |
281 | ||
09957b1c | 282 | for (i=0, slp=ads->sortlist; |
609133ee | 283 | i<ads->nsortlist && |
477b9c0b MW |
284 | !adns__addr_match_p(af,ad, slp->af,&slp->base,&slp->mask) && |
285 | !(v6mappedp && | |
286 | adns__addr_match_p(AF_INET,&a, slp->af,&slp->base,&slp->mask)); | |
09957b1c | 287 | i++, slp++); |
288 | return i; | |
eb81d633 | 289 | } |
290 | ||
f930c455 | 291 | static int dip_genaddr(adns_state ads, int af, const void *a, const void *b) { |
09957b1c | 292 | int ai, bi; |
293 | ||
294 | if (!ads->nsortlist) return 0; | |
295 | ||
f930c455 MW |
296 | ai= search_sortlist(ads,af,a); |
297 | bi= search_sortlist(ads,af,b); | |
09957b1c | 298 | return bi<ai; |
299 | } | |
300 | ||
609133ee | 301 | static int di_inaddr(adns_state ads, |
302 | const void *datap_a, const void *datap_b) { | |
f930c455 | 303 | return dip_genaddr(ads,AF_INET,datap_a,datap_b); |
e062dcae | 304 | } |
305 | ||
b0e8338a MW |
306 | static adns_status csp_genaddr(vbuf *vb, int af, const void *p) { |
307 | char buf[ADNS_ADDR2TEXT_BUFLEN]; | |
308 | int len= sizeof(buf); | |
309 | adns_rr_addr a; | |
310 | int err; | |
311 | ||
312 | memset(&a, 0, sizeof(a)); | |
313 | a.addr.sa.sa_family= af; | |
314 | adns__sockaddr_inject(p, 0, &a.addr.sa); | |
315 | err= adns_addr2text(&a.addr.sa,0, buf,&len, 0); assert(!err); | |
316 | CSP_ADDSTR(buf); | |
1dfe95d8 | 317 | return adns_s_ok; |
86e7b8d9 | 318 | } |
e7a9ca47 | 319 | |
b0e8338a MW |
320 | static adns_status cs_inaddr(vbuf *vb, const void *datap) { |
321 | return csp_genaddr(vb, AF_INET,datap); | |
322 | } | |
323 | ||
eb81d633 | 324 | /* |
50e2b0c3 MW |
325 | * _in6addr (pa,di,cs) |
326 | */ | |
327 | ||
328 | static adns_status pa_in6addr(const parseinfo *pai, int cbyte, | |
329 | int max, void *datap) { | |
330 | struct in6_addr *storeto= datap; | |
331 | ||
332 | if (max-cbyte != 16) return adns_s_invaliddata; | |
333 | memcpy(storeto->s6_addr, pai->dgram + cbyte, 16); | |
334 | return adns_s_ok; | |
335 | } | |
336 | ||
337 | static int di_in6addr(adns_state ads, | |
338 | const void *datap_a, const void *datap_b) { | |
339 | return dip_genaddr(ads,AF_INET6,datap_a,datap_b); | |
340 | } | |
341 | ||
342 | static adns_status cs_in6addr(vbuf *vb, const void *datap) { | |
343 | return csp_genaddr(vb,AF_INET6,datap); | |
344 | } | |
345 | ||
346 | /* | |
908dbcfa | 347 | * _addr (pap,pa,di,div,csp,cs,gsz,qs |
2ca5496d MW |
348 | * +search_sortlist_sa, dip_sockaddr, addr_rrtypes, |
349 | * addr_submit, icb_addr) | |
eb81d633 | 350 | */ |
351 | ||
9d138734 MW |
352 | static const typeinfo tinfo_addrsub; |
353 | ||
2ca5496d | 354 | #define ADDR_RRTYPES(_) _(a) _(aaaa) |
9d138734 MW |
355 | |
356 | static const adns_rrtype addr_all_rrtypes[] = { | |
357 | #define RRTY_CODE(ty) adns_r_##ty, | |
358 | ADDR_RRTYPES(RRTY_CODE) | |
359 | #undef RRTY_CODE | |
360 | }; | |
361 | ||
362 | enum { | |
363 | #define RRTY_INDEX(ty) addr__ri_##ty, | |
364 | ADDR_RRTYPES(RRTY_INDEX) | |
365 | #undef RRTY_INDEX | |
366 | addr_nrrtypes, | |
367 | #define RRTY_FLAG(ty) addr_rf_##ty = 1 << addr__ri_##ty, | |
368 | ADDR_RRTYPES(RRTY_FLAG) | |
369 | addr__rrty_hunoz | |
370 | #undef RRTY_FLAG | |
371 | }; | |
372 | ||
373 | static unsigned addr_rrtypeflag(adns_rrtype type) { | |
374 | int i; | |
375 | ||
376 | type &= adns_rrt_typemask; | |
377 | for (i=0; i<addr_nrrtypes && type!=addr_all_rrtypes[i]; i++); | |
378 | return i < addr_nrrtypes ? 1 << i : 0; | |
379 | } | |
380 | ||
1bc731c6 MW |
381 | /* About CNAME handling in addr queries. |
382 | * | |
383 | * A user-level addr query is translated into a number of protocol-level | |
384 | * queries, and its job is to reassemble the results. This gets tricky if | |
385 | * the answers aren't consistent. In particular, if the answers report | |
386 | * inconsistent indirection via CNAME records (e.g., different CNAMEs, or | |
387 | * some indirect via a CNAME, and some don't) then we have trouble. | |
388 | * | |
389 | * Once we've received an answer, even if it was NODATA, we set | |
390 | * adns__qf_addr_answer on the parent query. This will let us detect a | |
391 | * conflict between a no-CNAME-with-NODATA reply and a subsequent CNAME. | |
392 | * | |
393 | * If we detect a conflict of any kind, then at least one answer came back | |
394 | * with a CNAME record, so we pick the first such answer (somewhat | |
395 | * arbitrarily) as being the `right' canonical name, and set this in the | |
396 | * parent query's answer->cname slot. We discard address records from the | |
397 | * wrong name. And finally we cancel the outstanding child queries, and | |
398 | * resubmit address queries for the address families we don't yet have, with | |
399 | * adns__qf_addr_cname set so that we know that we're in the fixup state. | |
400 | */ | |
401 | ||
908dbcfa MW |
402 | static adns_status pap_addr(const parseinfo *pai, int rrty, size_t rrsz, |
403 | int *cbyte_io, int max, adns_rr_addr *storeto) { | |
1dfe95d8 | 404 | const byte *dgram= pai->dgram; |
908dbcfa | 405 | int af, addrlen, salen; |
cdf51ff0 | 406 | struct in6_addr v6map; |
908dbcfa MW |
407 | const void *oaddr= dgram + *cbyte_io; |
408 | int avail= max - *cbyte_io; | |
409 | int step= -1; | |
410 | void *addrp= 0; | |
411 | ||
412 | switch (rrty) { | |
413 | case adns_r_a: | |
cdf51ff0 MW |
414 | if ((pai->qu->flags & adns_qf_ipv6_mapv4) && |
415 | (pai->qu->answer->type & adns__qtf_bigaddr)) { | |
416 | if (avail < 4) return adns_s_invaliddata; | |
417 | memset(v6map.s6_addr + 0, 0x00, 10); | |
418 | memset(v6map.s6_addr + 10, 0xff, 2); | |
419 | memcpy(v6map.s6_addr + 12, oaddr, 4); | |
420 | oaddr= v6map.s6_addr; avail= sizeof(v6map.s6_addr); | |
421 | if (step < 0) step= 4; | |
422 | goto aaaa; | |
423 | } | |
908dbcfa MW |
424 | af= AF_INET; addrlen= 4; |
425 | addrp= &storeto->addr.inet.sin_addr; | |
426 | salen= sizeof(storeto->addr.inet); | |
427 | break; | |
cdf51ff0 MW |
428 | case adns_r_aaaa: |
429 | aaaa: | |
430 | af= AF_INET6; addrlen= 16; | |
431 | addrp= storeto->addr.inet6.sin6_addr.s6_addr; | |
432 | salen= sizeof(storeto->addr.inet6); | |
433 | break; | |
908dbcfa MW |
434 | } |
435 | assert(addrp); | |
c7836bc9 | 436 | |
908dbcfa MW |
437 | assert(offsetof(adns_rr_addr, addr) + salen <= rrsz); |
438 | if (addrlen < avail) return adns_s_invaliddata; | |
439 | if (step < 0) step= addrlen; | |
440 | *cbyte_io += step; | |
441 | memset(&storeto->addr, 0, salen); | |
442 | storeto->len= salen; | |
443 | storeto->addr.sa.sa_family= af; | |
444 | memcpy(addrp, oaddr, addrlen); | |
445 | ||
446 | return adns_s_ok; | |
447 | } | |
448 | ||
449 | static adns_status pa_addr(const parseinfo *pai, int cbyte, | |
450 | int max, void *datap) { | |
451 | int err= pap_addr(pai, pai->qu->answer->type & adns_rrt_typemask, | |
452 | pai->qu->answer->rrsz, &cbyte, max, datap); | |
453 | if (err) return err; | |
454 | if (cbyte != max) return adns_s_invaliddata; | |
828d89bd | 455 | return adns_s_ok; |
456 | } | |
457 | ||
f930c455 | 458 | static int search_sortlist_sa(adns_state ads, const struct sockaddr *sa) { |
07554ccd MW |
459 | union gen_addr a; |
460 | adns__sockaddr_extract(sa, &a, 0); | |
461 | return search_sortlist(ads, sa->sa_family, &a); | |
f930c455 | 462 | } |
07554ccd | 463 | |
f930c455 MW |
464 | static int dip_sockaddr(adns_state ads, |
465 | const struct sockaddr *sa, | |
466 | const struct sockaddr *sb) { | |
467 | if (!ads->sortlist) return 0; | |
468 | return search_sortlist_sa(ads, sa) > search_sortlist_sa(ads, sb); | |
469 | } | |
470 | ||
09957b1c | 471 | static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) { |
551ff40f | 472 | const adns_rr_addr *ap= datap_a, *bp= datap_b; |
f930c455 | 473 | return dip_sockaddr(ads, &ap->addr.sa, &bp->addr.sa); |
828d89bd | 474 | } |
475 | ||
09957b1c | 476 | static int div_addr(void *context, const void *datap_a, const void *datap_b) { |
477 | const adns_state ads= context; | |
478 | ||
479 | return di_addr(ads, datap_a, datap_b); | |
480 | } | |
481 | ||
551ff40f | 482 | static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) { |
b0e8338a MW |
483 | char buf[ADNS_ADDR2TEXT_BUFLEN]; |
484 | int len= sizeof(buf); | |
485 | int err; | |
828d89bd | 486 | |
487 | switch (rrp->addr.inet.sin_family) { | |
488 | case AF_INET: | |
b365d68a | 489 | CSP_ADDSTR("INET "); |
b0e8338a MW |
490 | goto a2t; |
491 | case AF_INET6: | |
492 | CSP_ADDSTR("INET6 "); | |
493 | goto a2t; | |
494 | a2t: | |
495 | err= adns_addr2text(&rrp->addr.sa,0, buf,&len, 0); assert(!err); | |
496 | CSP_ADDSTR(buf); | |
828d89bd | 497 | break; |
498 | default: | |
499 | sprintf(buf,"AF=%u",rrp->addr.sa.sa_family); | |
1dfe95d8 | 500 | CSP_ADDSTR(buf); |
828d89bd | 501 | break; |
502 | } | |
503 | return adns_s_ok; | |
504 | } | |
505 | ||
1dfe95d8 | 506 | static adns_status cs_addr(vbuf *vb, const void *datap) { |
551ff40f | 507 | const adns_rr_addr *rrp= datap; |
1dfe95d8 | 508 | |
509 | return csp_addr(vb,rrp); | |
510 | } | |
511 | ||
b0a32b17 MW |
512 | static int gsz_addr(const typeinfo *typei, adns_rrtype type) { |
513 | return type & adns__qtf_bigaddr ? | |
514 | sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only); | |
515 | } | |
516 | ||
9d138734 MW |
517 | static unsigned addr_rrtypes(adns_state ads, adns_rrtype type, |
518 | adns_queryflags qf) { | |
519 | /* Return a mask of addr_rf_... flags indicating which address families are | |
520 | * wanted, given a query type and flags. | |
521 | */ | |
522 | return addr_rf_a; | |
523 | } | |
524 | ||
525 | static void icb_addr(adns_query parent, adns_query child); | |
526 | ||
527 | static void addr_subqueries(adns_query qu, struct timeval now, | |
528 | adns_queryflags qf_extra, | |
529 | const byte *qd_dgram, int qd_dglen) { | |
530 | int i, err, id; | |
531 | adns_query cqu; | |
532 | adns_queryflags qf= (qu->flags & ~adns_qf_search) | qf_extra; | |
533 | adns_rrtype qtf= qu->answer->type & adns__qtf_deref; | |
534 | unsigned which= qu->ctx.tinfo.addr.want & ~qu->ctx.tinfo.addr.have; | |
535 | qcontext ctx; | |
536 | ||
537 | memset(&ctx, 0, sizeof(ctx)); | |
538 | ctx.callback= icb_addr; | |
539 | for (i=0; i<addr_nrrtypes; i++) { | |
540 | if (!(which & (1 << i))) continue; | |
541 | err= adns__mkquery_frdgram(qu->ads, &qu->vb, &id, qd_dgram,qd_dglen, | |
542 | DNS_HDRSIZE, addr_all_rrtypes[i], qf); | |
543 | if (err) goto x_error; | |
544 | err= adns__internal_submit(qu->ads, &cqu, qu, &tinfo_addrsub, | |
545 | addr_all_rrtypes[i] | qtf, | |
546 | &qu->vb, id, qf, now, &ctx); | |
547 | if (err) goto x_error; | |
548 | cqu->answer->rrsz= qu->answer->rrsz; | |
549 | } | |
550 | qu->state= query_childw; | |
551 | LIST_LINK_TAIL(qu->ads->childw, qu); | |
552 | return; | |
553 | ||
554 | x_error: | |
555 | adns__query_fail(qu, err); | |
556 | } | |
557 | ||
2ca5496d MW |
558 | static adns_status addr_submit(adns_query parent, adns_query *query_r, |
559 | vbuf *qumsg_vb, int id, unsigned want, | |
560 | adns_queryflags flags, struct timeval now, | |
561 | qcontext *ctx) { | |
562 | /* This is effectively a substitute for adns__internal_submit, intended for | |
563 | * the case where the caller (possibly) only wants a subset of the | |
564 | * available record types. The memory management and callback rules are | |
565 | * the same as for adns__internal_submit. | |
566 | * | |
567 | * Some differences: the query is linked onto the parent's children list | |
568 | * before exit (though the parent's state is not changed, and it is not | |
569 | * linked into the childw list queue); and we fiddle with the `tinfo' | |
570 | * portion of the context structure (yes, modifying *ctx), since this is, | |
571 | * in fact, the main purpose of this function. | |
572 | */ | |
573 | ||
574 | adns_state ads= parent->ads; | |
575 | adns_query qu; | |
576 | adns_status err; | |
577 | adns_rrtype type= ((adns_r_addr & adns_rrt_reprmask) | | |
578 | (parent->answer->type & ~adns_rrt_reprmask)); | |
579 | ||
580 | ctx->tinfo.addr.want= want; | |
581 | ctx->tinfo.addr.have= 0; | |
582 | err= adns__internal_submit(ads, &qu, parent, adns__findtype(adns_r_addr), | |
583 | type, qumsg_vb, id, flags, now, ctx); | |
584 | if (err) return err; | |
585 | ||
586 | *query_r= qu; | |
587 | return adns_s_ok; | |
588 | } | |
589 | ||
9d138734 MW |
590 | static adns_status append_addrs(adns_query qu, size_t rrsz, |
591 | adns_rr_addr **dp, int *dlen, | |
592 | const adns_rr_addr *sp, int slen) { | |
593 | /* Append a vector of slen addr records, each of size rrsz, starting at ap, | |
594 | * to a vector starting at *dp, of length *dlen. On successful completion, | |
595 | * *dp and *dlen are updated. | |
596 | */ | |
597 | ||
598 | size_t drrsz= *dlen*rrsz, srrsz= slen*rrsz; | |
599 | byte *p; | |
600 | ||
601 | if (!slen) return adns_s_ok; | |
602 | p= adns__alloc_interim(qu, drrsz + srrsz); | |
603 | if (!p) R_NOMEM; | |
604 | if (*dlen) { | |
605 | memcpy(p, *dp, drrsz); | |
606 | adns__free_interim(qu, *dp); | |
607 | } | |
608 | memcpy(p + drrsz, sp, srrsz); | |
609 | *dlen += slen; | |
610 | *dp= (adns_rr_addr *)p; | |
611 | return adns_s_ok; | |
612 | } | |
613 | ||
614 | static void propagate_ttl(adns_query to, adns_query from) | |
615 | { if (to->expires > from->expires) to->expires= from->expires; } | |
616 | ||
617 | static adns_status copy_cname_from_child(adns_query parent, adns_query child) { | |
618 | adns_answer *pans= parent->answer, *cans= child->answer; | |
619 | size_t n= strlen(cans->cname) + 1; | |
620 | ||
621 | pans->cname= adns__alloc_preserved(parent, n); | |
622 | if (!pans->cname) R_NOMEM; | |
623 | memcpy(pans->cname, cans->cname, n); | |
624 | return adns_s_ok; | |
625 | } | |
626 | ||
627 | static void done_addr_type(adns_query qu, adns_rrtype type) { | |
628 | unsigned f= addr_rrtypeflag(type); | |
629 | assert(f); qu->ctx.tinfo.addr.have |= f; | |
630 | } | |
631 | ||
632 | static void icb_addr(adns_query parent, adns_query child) { | |
633 | adns_state ads= parent->ads; | |
634 | adns_answer *pans= parent->answer, *cans= child->answer; | |
635 | struct timeval now; | |
636 | adns_status err; | |
1bc731c6 MW |
637 | adns_queryflags qf; |
638 | int id; | |
9d138734 MW |
639 | |
640 | propagate_ttl(parent, child); | |
641 | ||
1bc731c6 MW |
642 | if (!(child->flags & adns__qf_addr_cname) && |
643 | (parent->flags & adns__qf_addr_answer) && | |
644 | (!!pans->cname != !!cans->cname || | |
645 | (pans->cname && strcmp(pans->cname, cans->cname)))) { | |
646 | /* We've detected an inconsistency in CNAME records, and must deploy | |
647 | * countermeasures. | |
648 | */ | |
649 | ||
650 | if (!pans->cname) { | |
651 | /* The child has a CNAME record, but the parent doesn't. We must | |
652 | * discard all of the parent's addresses, and substitute the child's. | |
653 | */ | |
654 | ||
655 | assert(pans->rrsz == cans->rrsz); | |
656 | adns__free_interim(parent, pans->rrs.bytes); | |
657 | adns__transfer_interim(child, parent, cans->rrs.bytes); | |
658 | pans->rrs.bytes= cans->rrs.bytes; | |
659 | pans->nrrs= cans->nrrs; | |
660 | parent->ctx.tinfo.addr.have= 0; | |
661 | done_addr_type(parent, cans->type); | |
662 | err= copy_cname_from_child(parent, child); if (err) goto x_err; | |
663 | } | |
664 | ||
665 | /* We've settled on the CNAME (now) associated with the parent, which | |
666 | * already has appropriate address records. Build a query datagram for | |
667 | * this name so that we can issue child queries for the missing address | |
668 | * families. The child's vbuf looks handy for this. | |
669 | */ | |
670 | err= adns__mkquery(ads, &child->vb, &id, pans->cname, | |
671 | strlen(pans->cname), &tinfo_addrsub, | |
672 | adns_r_addr, parent->flags); | |
673 | if (err) goto x_err; | |
674 | ||
675 | /* Now cancel the remaining children, and try again with the CNAME we've | |
676 | * settled on. | |
677 | */ | |
678 | adns__cancel_children(parent); | |
679 | if (gettimeofday(&now, 0)) goto x_gtod; | |
680 | qf= adns__qf_addr_cname; | |
681 | if (!(parent->flags & adns_qf_cname_loose)) qf |= adns_qf_cname_forbid; | |
682 | addr_subqueries(parent, now, qf, child->vb.buf, child->vb.used); | |
683 | return; | |
684 | } | |
685 | ||
9d138734 MW |
686 | if (cans->cname && !pans->cname) { |
687 | err= copy_cname_from_child(parent, child); | |
688 | if (err) goto x_err; | |
689 | } | |
690 | ||
691 | if ((parent->flags & adns_qf_search) && | |
692 | !pans->cname && cans->status == adns_s_nxdomain) { | |
693 | /* We're searching a list of suffixes, and the name doesn't exist. Try | |
694 | * the next one. | |
695 | */ | |
696 | ||
697 | adns__cancel_children(parent); | |
698 | adns__free_interim(parent, pans->rrs.bytes); | |
699 | pans->rrs.bytes= 0; pans->nrrs= 0; | |
700 | if (gettimeofday(&now, 0)) goto x_gtod; | |
701 | adns__search_next(ads, parent, now); | |
702 | return; | |
703 | } | |
704 | ||
705 | if (cans->status && cans->status != adns_s_nodata) | |
706 | { err= cans->status; goto x_err; } | |
707 | ||
708 | assert(pans->rrsz == cans->rrsz); | |
709 | err= append_addrs(parent, pans->rrsz, | |
710 | &pans->rrs.addr, &pans->nrrs, | |
711 | cans->rrs.addr, cans->nrrs); | |
712 | if (err) goto x_err; | |
713 | done_addr_type(parent, cans->type); | |
714 | ||
715 | if (parent->children.head) LIST_LINK_TAIL(ads->childw, parent); | |
716 | else if (!pans->nrrs) adns__query_fail(parent, adns_s_nodata); | |
717 | else adns__query_done(parent); | |
1bc731c6 | 718 | parent->flags |= adns__qf_addr_answer; |
9d138734 MW |
719 | return; |
720 | ||
721 | x_gtod: | |
722 | adns__diag(ads, -1, parent, "gettimeofday failed: %s", strerror(errno)); | |
723 | err= adns_s_systemfail; | |
724 | goto x_err; | |
725 | ||
726 | x_err: | |
727 | adns__query_fail(parent, err); | |
728 | } | |
729 | ||
730 | static void qs_addr(adns_query qu, struct timeval now) { | |
731 | if (!qu->ctx.tinfo.addr.want) { | |
732 | qu->ctx.tinfo.addr.want= addr_rrtypes(qu->ads, qu->answer->type, | |
733 | qu->flags); | |
734 | qu->ctx.tinfo.addr.have= 0; | |
735 | } | |
736 | addr_subqueries(qu, now, 0, qu->query_dgram, qu->query_dglen); | |
737 | } | |
738 | ||
eb81d633 | 739 | /* |
b365d68a | 740 | * _domain (pap,csp,cs) |
741 | * _dom_raw (pa) | |
eb81d633 | 742 | */ |
743 | ||
1dfe95d8 | 744 | static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max, |
745 | char **domain_r, parsedomain_flags flags) { | |
e062dcae | 746 | adns_status st; |
747 | char *dm; | |
748 | ||
1dfe95d8 | 749 | st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags, |
750 | pai->dgram,pai->dglen, cbyte_io, max); | |
e062dcae | 751 | if (st) return st; |
1dfe95d8 | 752 | if (!pai->qu->vb.used) return adns_s_invaliddata; |
e062dcae | 753 | |
1dfe95d8 | 754 | dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1); |
755 | if (!dm) R_NOMEM; | |
e062dcae | 756 | |
1dfe95d8 | 757 | dm[pai->qu->vb.used]= 0; |
758 | memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used); | |
e062dcae | 759 | |
760 | *domain_r= dm; | |
761 | return adns_s_ok; | |
762 | } | |
763 | ||
b365d68a | 764 | static adns_status csp_domain(vbuf *vb, const char *domain) { |
765 | CSP_ADDSTR(domain); | |
766 | if (!*domain) CSP_ADDSTR("."); | |
767 | return adns_s_ok; | |
768 | } | |
769 | ||
770 | static adns_status cs_domain(vbuf *vb, const void *datap) { | |
771 | const char *const *domainp= datap; | |
772 | return csp_domain(vb,*domainp); | |
773 | } | |
774 | ||
609133ee | 775 | static adns_status pa_dom_raw(const parseinfo *pai, int cbyte, |
776 | int max, void *datap) { | |
b365d68a | 777 | char **rrp= datap; |
778 | adns_status st; | |
779 | ||
780 | st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok); | |
781 | if (st) return st; | |
782 | ||
783 | if (cbyte != max) return adns_s_invaliddata; | |
784 | return adns_s_ok; | |
785 | } | |
786 | ||
eb81d633 | 787 | /* |
788 | * _host_raw (pa) | |
789 | */ | |
790 | ||
609133ee | 791 | static adns_status pa_host_raw(const parseinfo *pai, int cbyte, |
792 | int max, void *datap) { | |
e062dcae | 793 | char **rrp= datap; |
ffbda80c | 794 | adns_status st; |
86e7b8d9 | 795 | |
1dfe95d8 | 796 | st= pap_domain(pai, &cbyte, max, rrp, |
797 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
e062dcae | 798 | if (st) return st; |
799 | ||
800 | if (cbyte != max) return adns_s_invaliddata; | |
801 | return adns_s_ok; | |
802 | } | |
ffbda80c | 803 | |
eb81d633 | 804 | /* |
382b81f7 | 805 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr) |
eb81d633 | 806 | */ |
c7836bc9 | 807 | |
1dfe95d8 | 808 | static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha, |
2ca5496d | 809 | unsigned *want_io, size_t addrsz, |
1dfe95d8 | 810 | int *cbyte_io, int count, int dmstart) { |
811 | int rri, naddrs; | |
2ca5496d MW |
812 | unsigned typef, want= *want_io, need= want; |
813 | int type, class, rdlen, rdend, rdstart, ownermatched; | |
73dba56e | 814 | unsigned long ttl; |
1dfe95d8 | 815 | adns_status st; |
c7836bc9 | 816 | |
2ca5496d | 817 | for (rri=0, naddrs=0; rri<count; rri++) { |
609133ee | 818 | st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram, |
819 | pai->dglen, cbyte_io, | |
73dba56e | 820 | &type, &class, &ttl, &rdlen, &rdstart, |
1dfe95d8 | 821 | pai->dgram, pai->dglen, dmstart, &ownermatched); |
c7836bc9 | 822 | if (st) return st; |
2ca5496d MW |
823 | if (!ownermatched || class != DNS_CLASS_IN) continue; |
824 | typef= addr_rrtypeflag(type); | |
825 | if (!(want & typef)) continue; | |
826 | need &= ~typef; | |
827 | if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*addrsz)) R_NOMEM; | |
73dba56e | 828 | adns__update_expires(pai->qu,ttl,pai->now); |
908dbcfa | 829 | rdend= rdstart + rdlen; |
2ca5496d | 830 | st= pap_addr(pai, type, addrsz, &rdstart, rdend, |
908dbcfa | 831 | (adns_rr_addr *)(pai->qu->vb.buf + naddrs*addrsz)); |
c7836bc9 | 832 | if (st) return st; |
908dbcfa | 833 | if (rdstart != rdend) return adns_s_invaliddata; |
1dfe95d8 | 834 | naddrs++; |
c7836bc9 | 835 | } |
2ca5496d MW |
836 | if (naddrs > 0) { |
837 | st= append_addrs(pai->qu, addrsz, &ha->addrs, &ha->naddrs, | |
838 | (const adns_rr_addr *)pai->qu->vb.buf, naddrs); | |
839 | if (st) return st; | |
c7836bc9 | 840 | ha->astatus= adns_s_ok; |
1dfe95d8 | 841 | |
2ca5496d MW |
842 | if (!need) { |
843 | adns__isort(ha->addrs, naddrs, addrsz, pai->qu->vb.buf, | |
844 | div_addr, pai->ads); | |
845 | } | |
c7836bc9 | 846 | } |
2ca5496d | 847 | *want_io= need; |
c7836bc9 | 848 | return adns_s_ok; |
849 | } | |
850 | ||
551ff40f | 851 | static void icb_hostaddr(adns_query parent, adns_query child) { |
551ff40f | 852 | adns_answer *cans= child->answer; |
0ea82d76 | 853 | adns_rr_hostaddr *rrp= child->ctx.pinfo.hostaddr; |
4218fb9a | 854 | adns_state ads= parent->ads; |
b365d68a | 855 | adns_status st; |
2ca5496d | 856 | size_t addrsz= gsz_addr(0, parent->answer->type); |
551ff40f | 857 | |
2ca5496d MW |
858 | st= cans->status == adns_s_nodata ? adns_s_ok : cans->status; |
859 | if (st) goto done; | |
860 | propagate_ttl(parent, child); | |
861 | ||
862 | assert(addrsz == cans->rrsz); | |
863 | st= append_addrs(parent, addrsz, | |
864 | &rrp->addrs, &rrp->naddrs, | |
865 | cans->rrs.addr, cans->nrrs); | |
866 | if (st) goto done; | |
867 | if (!rrp->naddrs) { st= adns_s_nodata; goto done; } | |
868 | ||
869 | if (!adns__vbuf_ensure(&parent->vb, addrsz)) | |
870 | { st= adns_s_nomemory; goto done; } | |
871 | adns__isort(rrp->addrs, rrp->naddrs, addrsz, parent->vb.buf, | |
872 | div_addr, ads); | |
873 | ||
874 | done: | |
875 | if (st) { | |
876 | adns__free_interim(parent, rrp->addrs); | |
877 | rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : 0; | |
878 | } | |
a6536d8b | 879 | |
2ca5496d | 880 | rrp->astatus= st; |
4218fb9a | 881 | if (parent->children.head) { |
882 | LIST_LINK_TAIL(ads->childw,parent); | |
883 | } else { | |
884 | adns__query_done(parent); | |
885 | } | |
551ff40f | 886 | } |
887 | ||
1dfe95d8 | 888 | static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io, |
889 | int max, adns_rr_hostaddr *rrp) { | |
c7836bc9 | 890 | adns_status st; |
891 | int dmstart, cbyte; | |
7da21070 | 892 | qcontext ctx; |
893 | int id; | |
894 | adns_query nqu; | |
4b707d8b | 895 | adns_queryflags nflags; |
2ca5496d | 896 | unsigned want; |
b0a32b17 | 897 | size_t addrsz= gsz_addr(0, pai->qu->answer->type); |
c7836bc9 | 898 | |
899 | dmstart= cbyte= *cbyte_io; | |
1dfe95d8 | 900 | st= pap_domain(pai, &cbyte, max, &rrp->host, |
901 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
c7836bc9 | 902 | if (st) return st; |
903 | *cbyte_io= cbyte; | |
904 | ||
905 | rrp->astatus= adns_s_ok; | |
2ca5496d | 906 | rrp->naddrs= 0; |
c7836bc9 | 907 | rrp->addrs= 0; |
908 | ||
1dfe95d8 | 909 | cbyte= pai->nsstart; |
c7836bc9 | 910 | |
2ca5496d MW |
911 | want= addr_rrtypes(pai->ads, pai->qu->answer->type, pai->qu->flags); |
912 | ||
913 | st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->nscount, dmstart); | |
c7836bc9 | 914 | if (st) return st; |
2ca5496d | 915 | if (!want) return adns_s_ok; |
c7836bc9 | 916 | |
2ca5496d | 917 | st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->arcount, dmstart); |
c7836bc9 | 918 | if (st) return st; |
2ca5496d | 919 | if (!want) return adns_s_ok; |
1dfe95d8 | 920 | |
7da21070 | 921 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
922 | pai->dgram, pai->dglen, dmstart, | |
923 | adns_r_addr, adns_qf_quoteok_query); | |
924 | if (st) return st; | |
551ff40f | 925 | |
a6536d8b | 926 | ctx.ext= 0; |
927 | ctx.callback= icb_hostaddr; | |
0ea82d76 | 928 | ctx.pinfo.hostaddr= rrp; |
4b707d8b | 929 | |
cdf51ff0 | 930 | nflags= adns_qf_quoteok_query | (pai->qu->flags & adns_qf_ipv6_mapv4); |
4b707d8b | 931 | if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid; |
932 | ||
2ca5496d MW |
933 | st= addr_submit(pai->qu, &nqu, &pai->qu->vb, id, want, |
934 | nflags, pai->now, &ctx); | |
7da21070 | 935 | if (st) return st; |
936 | ||
1dfe95d8 | 937 | return adns_s_ok; |
c7836bc9 | 938 | } |
939 | ||
609133ee | 940 | static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, |
941 | int max, void *datap) { | |
1dfe95d8 | 942 | adns_rr_hostaddr *rrp= datap; |
c7836bc9 | 943 | adns_status st; |
c7836bc9 | 944 | |
1dfe95d8 | 945 | st= pap_hostaddr(pai, &cbyte, max, rrp); |
c7836bc9 | 946 | if (st) return st; |
947 | if (cbyte != max) return adns_s_invaliddata; | |
948 | ||
1dfe95d8 | 949 | return adns_s_ok; |
950 | } | |
c7836bc9 | 951 | |
609133ee | 952 | static int dip_hostaddr(adns_state ads, |
953 | const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) { | |
1dfe95d8 | 954 | if (ap->astatus != bp->astatus) return ap->astatus; |
955 | if (ap->astatus) return 0; | |
c7836bc9 | 956 | |
f930c455 | 957 | return dip_sockaddr(ads, &ap->addrs[0].addr.sa, &bp->addrs[0].addr.sa); |
1dfe95d8 | 958 | } |
959 | ||
609133ee | 960 | static int di_hostaddr(adns_state ads, |
961 | const void *datap_a, const void *datap_b) { | |
1dfe95d8 | 962 | const adns_rr_hostaddr *ap= datap_a, *bp= datap_b; |
963 | ||
09957b1c | 964 | return dip_hostaddr(ads, ap,bp); |
c7836bc9 | 965 | } |
966 | ||
eb81d633 | 967 | static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) { |
968 | void *tablev; | |
b0a32b17 | 969 | size_t addrsz= gsz_addr(0, qu->answer->type); |
e062dcae | 970 | |
eb81d633 | 971 | adns__makefinal_str(qu,&rrp->host); |
972 | tablev= rrp->addrs; | |
b0a32b17 | 973 | adns__makefinal_block(qu, &tablev, rrp->naddrs*addrsz); |
eb81d633 | 974 | rrp->addrs= tablev; |
e062dcae | 975 | } |
976 | ||
eb81d633 | 977 | static void mf_hostaddr(adns_query qu, void *datap) { |
978 | adns_rr_hostaddr *rrp= datap; | |
e062dcae | 979 | |
eb81d633 | 980 | mfp_hostaddr(qu,rrp); |
e062dcae | 981 | } |
982 | ||
1dfe95d8 | 983 | static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) { |
a6f1dc92 | 984 | const char *errstr; |
1dfe95d8 | 985 | adns_status st; |
ac77ffc1 | 986 | char buf[20]; |
1dfe95d8 | 987 | int i; |
988 | ||
a6f1dc92 | 989 | st= csp_domain(vb,rrp->host); if (st) return st; |
1dfe95d8 | 990 | |
b365d68a | 991 | CSP_ADDSTR(" "); |
ac77ffc1 | 992 | CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus)); |
993 | ||
994 | sprintf(buf," %d ",rrp->astatus); | |
995 | CSP_ADDSTR(buf); | |
a6f1dc92 | 996 | |
ac77ffc1 | 997 | CSP_ADDSTR(adns_errabbrev(rrp->astatus)); |
a6f1dc92 | 998 | CSP_ADDSTR(" "); |
ac77ffc1 | 999 | |
a6f1dc92 | 1000 | errstr= adns_strerror(rrp->astatus); |
1001 | st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st; | |
b365d68a | 1002 | |
1003 | if (rrp->naddrs >= 0) { | |
1004 | CSP_ADDSTR(" ("); | |
1005 | for (i=0; i<rrp->naddrs; i++) { | |
1006 | CSP_ADDSTR(" "); | |
1dfe95d8 | 1007 | st= csp_addr(vb,&rrp->addrs[i]); |
1008 | } | |
b365d68a | 1009 | CSP_ADDSTR(" )"); |
1010 | } else { | |
1011 | CSP_ADDSTR(" ?"); | |
1dfe95d8 | 1012 | } |
1013 | return adns_s_ok; | |
1014 | } | |
1015 | ||
1016 | static adns_status cs_hostaddr(vbuf *vb, const void *datap) { | |
1017 | const adns_rr_hostaddr *rrp= datap; | |
1018 | ||
1019 | return csp_hostaddr(vb,rrp); | |
1020 | } | |
1021 | ||
eb81d633 | 1022 | /* |
1023 | * _mx_raw (pa,di) | |
1024 | */ | |
1dfe95d8 | 1025 | |
609133ee | 1026 | static adns_status pa_mx_raw(const parseinfo *pai, int cbyte, |
1027 | int max, void *datap) { | |
eb81d633 | 1028 | const byte *dgram= pai->dgram; |
1029 | adns_rr_intstr *rrp= datap; | |
1030 | adns_status st; | |
1031 | int pref; | |
1dfe95d8 | 1032 | |
eb81d633 | 1033 | if (cbyte+2 > max) return adns_s_invaliddata; |
1034 | GET_W(cbyte,pref); | |
1035 | rrp->i= pref; | |
1036 | st= pap_domain(pai, &cbyte, max, &rrp->str, | |
1037 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1038 | if (st) return st; | |
1dfe95d8 | 1039 | |
eb81d633 | 1040 | if (cbyte != max) return adns_s_invaliddata; |
1041 | return adns_s_ok; | |
1042 | } | |
1dfe95d8 | 1043 | |
09957b1c | 1044 | static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) { |
eb81d633 | 1045 | const adns_rr_intstr *ap= datap_a, *bp= datap_b; |
1046 | ||
1047 | if (ap->i < bp->i) return 0; | |
1048 | if (ap->i > bp->i) return 1; | |
1049 | return 0; | |
1dfe95d8 | 1050 | } |
1051 | ||
eb81d633 | 1052 | /* |
1053 | * _mx (pa,di) | |
1054 | */ | |
1dfe95d8 | 1055 | |
609133ee | 1056 | static adns_status pa_mx(const parseinfo *pai, int cbyte, |
1057 | int max, void *datap) { | |
eb81d633 | 1058 | const byte *dgram= pai->dgram; |
1059 | adns_rr_inthostaddr *rrp= datap; | |
1060 | adns_status st; | |
1061 | int pref; | |
1062 | ||
1063 | if (cbyte+2 > max) return adns_s_invaliddata; | |
1064 | GET_W(cbyte,pref); | |
1065 | rrp->i= pref; | |
1066 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); | |
1067 | if (st) return st; | |
1068 | ||
1069 | if (cbyte != max) return adns_s_invaliddata; | |
1070 | return adns_s_ok; | |
1071 | } | |
1072 | ||
09957b1c | 1073 | static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) { |
eb81d633 | 1074 | const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b; |
1075 | ||
1076 | if (ap->i < bp->i) return 0; | |
1077 | if (ap->i > bp->i) return 1; | |
09957b1c | 1078 | return dip_hostaddr(ads, &ap->ha, &bp->ha); |
1dfe95d8 | 1079 | } |
1080 | ||
eb81d633 | 1081 | /* |
1082 | * _inthostaddr (mf,cs) | |
1083 | */ | |
1084 | ||
1dfe95d8 | 1085 | static void mf_inthostaddr(adns_query qu, void *datap) { |
1086 | adns_rr_inthostaddr *rrp= datap; | |
1087 | ||
1088 | mfp_hostaddr(qu,&rrp->ha); | |
1089 | } | |
1090 | ||
eb81d633 | 1091 | static adns_status cs_inthostaddr(vbuf *vb, const void *datap) { |
1092 | const adns_rr_inthostaddr *rrp= datap; | |
1093 | char buf[10]; | |
e062dcae | 1094 | |
eb81d633 | 1095 | sprintf(buf,"%u ",rrp->i); |
1096 | CSP_ADDSTR(buf); | |
1097 | ||
1098 | return csp_hostaddr(vb,&rrp->ha); | |
ffbda80c | 1099 | } |
1100 | ||
eb81d633 | 1101 | /* |
b365d68a | 1102 | * _inthost (cs) |
1103 | */ | |
1104 | ||
1105 | static adns_status cs_inthost(vbuf *vb, const void *datap) { | |
1106 | const adns_rr_intstr *rrp= datap; | |
1107 | char buf[10]; | |
1108 | ||
1109 | sprintf(buf,"%u ",rrp->i); | |
1110 | CSP_ADDSTR(buf); | |
1111 | return csp_domain(vb,rrp->str); | |
1112 | } | |
1113 | ||
1114 | /* | |
938b0228 | 1115 | * _ptr (ckl,pa +icb_ptr) |
a6536d8b | 1116 | */ |
1117 | ||
938b0228 MW |
1118 | static adns_status ckl_ptr(adns_state ads, adns_queryflags flags, |
1119 | union checklabel_state *cls, qcontext *ctx, | |
1120 | int labnum, const char *label, int lablen) { | |
51cb3de3 MW |
1121 | if (lablen) { |
1122 | if (adns__revparse_label(&cls->ptr, labnum, label,lablen)) | |
1123 | return adns_s_querydomainwrong; | |
938b0228 | 1124 | } else { |
51cb3de3 MW |
1125 | if (adns__revparse_done(&cls->ptr, labnum, |
1126 | &ctx->tinfo.ptr.rev_rrtype, | |
1127 | &ctx->tinfo.ptr.addr)) | |
1128 | return adns_s_querydomainwrong; | |
938b0228 MW |
1129 | } |
1130 | return adns_s_ok; | |
1131 | } | |
1132 | ||
a6536d8b | 1133 | static void icb_ptr(adns_query parent, adns_query child) { |
1134 | adns_answer *cans= child->answer; | |
f930c455 | 1135 | const struct af_addr *queried; |
ac5a2748 | 1136 | const unsigned char *found; |
4218fb9a | 1137 | adns_state ads= parent->ads; |
a6536d8b | 1138 | int i; |
1139 | ||
1140 | if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) { | |
1141 | adns__query_fail(parent,adns_s_inconsistent); | |
1142 | return; | |
1143 | } else if (cans->status) { | |
1144 | adns__query_fail(parent,cans->status); | |
1145 | return; | |
1146 | } | |
1147 | ||
ac5a2748 MW |
1148 | queried= &parent->ctx.tinfo.ptr.addr; |
1149 | for (i=0, found=cans->rrs.bytes; i<cans->nrrs; i++, found+=cans->rrsz) { | |
51cb3de3 MW |
1150 | if (adns__genaddr_equal_p(queried->af,&queried->addr, |
1151 | parent->ctx.tinfo.ptr.addr.af,found)) { | |
4218fb9a | 1152 | if (!parent->children.head) { |
1153 | adns__query_done(parent); | |
1154 | return; | |
1155 | } else { | |
1156 | LIST_LINK_TAIL(ads->childw,parent); | |
1157 | return; | |
1158 | } | |
a6536d8b | 1159 | } |
1160 | } | |
1161 | ||
1162 | adns__query_fail(parent,adns_s_inconsistent); | |
1163 | } | |
1164 | ||
609133ee | 1165 | static adns_status pa_ptr(const parseinfo *pai, int dmstart, |
1166 | int max, void *datap) { | |
a6536d8b | 1167 | char **rrp= datap; |
1168 | adns_status st; | |
51cb3de3 | 1169 | adns_rrtype rrtype= pai->qu->ctx.tinfo.ptr.rev_rrtype; |
938b0228 | 1170 | int cbyte, id; |
a6536d8b | 1171 | adns_query nqu; |
1172 | qcontext ctx; | |
1173 | ||
1174 | cbyte= dmstart; | |
1175 | st= pap_domain(pai, &cbyte, max, rrp, | |
1176 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1177 | if (st) return st; | |
1178 | if (cbyte != max) return adns_s_invaliddata; | |
1179 | ||
a6536d8b | 1180 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
1181 | pai->dgram, pai->dglen, dmstart, | |
51cb3de3 | 1182 | rrtype, adns_qf_quoteok_query); |
a6536d8b | 1183 | if (st) return st; |
1184 | ||
1185 | ctx.ext= 0; | |
1186 | ctx.callback= icb_ptr; | |
0ea82d76 MW |
1187 | memset(&ctx.pinfo,0,sizeof(ctx.pinfo)); |
1188 | memset(&ctx.tinfo,0,sizeof(ctx.tinfo)); | |
07c3d3e2 IJ |
1189 | st= adns__internal_submit(pai->ads, &nqu, pai->qu, |
1190 | adns__findtype(rrtype), | |
51cb3de3 MW |
1191 | rrtype, &pai->qu->vb, id, |
1192 | adns_qf_quoteok_query, pai->now, &ctx); | |
a6536d8b | 1193 | if (st) return st; |
1194 | ||
a6536d8b | 1195 | return adns_s_ok; |
1196 | } | |
1197 | ||
1198 | /* | |
b365d68a | 1199 | * _strpair (mf) |
9ec44266 | 1200 | */ |
1201 | ||
1202 | static void mf_strpair(adns_query qu, void *datap) { | |
1203 | adns_rr_strpair *rrp= datap; | |
1204 | ||
1205 | adns__makefinal_str(qu,&rrp->array[0]); | |
1206 | adns__makefinal_str(qu,&rrp->array[1]); | |
1207 | } | |
1208 | ||
9ec44266 | 1209 | /* |
b365d68a | 1210 | * _intstrpair (mf) |
9ec44266 | 1211 | */ |
1212 | ||
1213 | static void mf_intstrpair(adns_query qu, void *datap) { | |
1214 | adns_rr_intstrpair *rrp= datap; | |
1215 | ||
1216 | adns__makefinal_str(qu,&rrp->array[0].str); | |
1217 | adns__makefinal_str(qu,&rrp->array[1].str); | |
1218 | } | |
1219 | ||
9ec44266 | 1220 | /* |
1221 | * _hinfo (pa) | |
1222 | */ | |
1223 | ||
609133ee | 1224 | static adns_status pa_hinfo(const parseinfo *pai, int cbyte, |
1225 | int max, void *datap) { | |
9ec44266 | 1226 | adns_rr_intstrpair *rrp= datap; |
1227 | adns_status st; | |
1228 | int i; | |
1229 | ||
1230 | for (i=0; i<2; i++) { | |
b365d68a | 1231 | st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str); |
9ec44266 | 1232 | if (st) return st; |
1233 | } | |
1234 | ||
1235 | if (cbyte != max) return adns_s_invaliddata; | |
1236 | ||
1237 | return adns_s_ok; | |
1238 | } | |
1239 | ||
1240 | /* | |
382b81f7 | 1241 | * _mailbox (pap,cs +pap_mailbox822) |
9ec44266 | 1242 | */ |
1243 | ||
609133ee | 1244 | static adns_status pap_mailbox822(const parseinfo *pai, |
1245 | int *cbyte_io, int max, char **mb_r) { | |
eaa44731 | 1246 | int lablen, labstart, i, needquote, c, r, neednorm; |
1247 | const unsigned char *p; | |
1248 | char *str; | |
1249 | findlabel_state fls; | |
1250 | adns_status st; | |
1251 | vbuf *vb; | |
1252 | ||
1253 | vb= &pai->qu->vb; | |
1254 | vb->used= 0; | |
1255 | adns__findlabel_start(&fls, pai->ads, | |
1256 | -1, pai->qu, | |
1257 | pai->dgram, pai->dglen, max, | |
1258 | *cbyte_io, cbyte_io); | |
1259 | st= adns__findlabel_next(&fls,&lablen,&labstart); | |
1260 | if (!lablen) { | |
b365d68a | 1261 | adns__vbuf_appendstr(vb,"."); |
eaa44731 | 1262 | goto x_ok; |
1263 | } | |
1264 | ||
1265 | neednorm= 1; | |
1266 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) { | |
1267 | c= *p++; | |
1268 | if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata; | |
1269 | if (c == '.' && !neednorm) neednorm= 1; | |
7672a872 | 1270 | else if (c==' ' || c>=127 || ctype_822special(c)) needquote++; |
eaa44731 | 1271 | else neednorm= 0; |
1272 | } | |
1273 | ||
1274 | if (needquote || neednorm) { | |
1275 | r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM; | |
1276 | adns__vbuf_appendq(vb,"\"",1); | |
1277 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) { | |
1278 | c= *p; | |
b365d68a | 1279 | if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1); |
eaa44731 | 1280 | adns__vbuf_appendq(vb,p,1); |
1281 | } | |
1282 | adns__vbuf_appendq(vb,"\"",1); | |
1283 | } else { | |
1284 | r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM; | |
1285 | } | |
1286 | ||
1287 | r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM; | |
1288 | ||
1289 | st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram); | |
1290 | if (st) return st; | |
1291 | ||
1292 | x_ok: | |
1293 | str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM; | |
1294 | memcpy(str,vb->buf,vb->used); | |
1295 | str[vb->used]= 0; | |
1296 | *mb_r= str; | |
1297 | return adns_s_ok; | |
9ec44266 | 1298 | } |
1299 | ||
9da4a044 | 1300 | static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max, |
1301 | char **mb_r) { | |
2c6eb096 | 1302 | if (pai->qu->typei->typekey & adns__qtf_mail822) { |
9da4a044 | 1303 | return pap_mailbox822(pai, cbyte_io, max, mb_r); |
1304 | } else { | |
b365d68a | 1305 | return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok); |
9da4a044 | 1306 | } |
1307 | } | |
1308 | ||
b365d68a | 1309 | static adns_status csp_mailbox(vbuf *vb, const char *mailbox) { |
1310 | return csp_domain(vb,mailbox); | |
1311 | } | |
1312 | ||
9ec44266 | 1313 | /* |
b365d68a | 1314 | * _rp (pa,cs) |
9ec44266 | 1315 | */ |
1316 | ||
609133ee | 1317 | static adns_status pa_rp(const parseinfo *pai, int cbyte, |
1318 | int max, void *datap) { | |
9ec44266 | 1319 | adns_rr_strpair *rrp= datap; |
1320 | adns_status st; | |
1321 | ||
1322 | st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]); | |
1323 | if (st) return st; | |
1324 | ||
1325 | st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok); | |
1326 | if (st) return st; | |
1327 | ||
1328 | if (cbyte != max) return adns_s_invaliddata; | |
1329 | return adns_s_ok; | |
1330 | } | |
1331 | ||
b365d68a | 1332 | static adns_status cs_rp(vbuf *vb, const void *datap) { |
1333 | const adns_rr_strpair *rrp= datap; | |
1334 | adns_status st; | |
1335 | ||
1336 | st= csp_mailbox(vb,rrp->array[0]); if (st) return st; | |
1337 | CSP_ADDSTR(" "); | |
1338 | st= csp_domain(vb,rrp->array[1]); if (st) return st; | |
1339 | ||
1340 | return adns_s_ok; | |
1341 | } | |
1342 | ||
9ec44266 | 1343 | /* |
1344 | * _soa (pa,mf,cs) | |
1345 | */ | |
1346 | ||
609133ee | 1347 | static adns_status pa_soa(const parseinfo *pai, int cbyte, |
1348 | int max, void *datap) { | |
9ec44266 | 1349 | adns_rr_soa *rrp= datap; |
1350 | const byte *dgram= pai->dgram; | |
1351 | adns_status st; | |
1352 | int msw, lsw, i; | |
1353 | ||
1354 | st= pap_domain(pai, &cbyte, max, &rrp->mname, | |
1355 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1356 | if (st) return st; | |
1357 | ||
1358 | st= pap_mailbox(pai, &cbyte, max, &rrp->rname); | |
1359 | if (st) return st; | |
1360 | ||
1361 | if (cbyte+20 != max) return adns_s_invaliddata; | |
1362 | ||
1363 | for (i=0; i<5; i++) { | |
1364 | GET_W(cbyte,msw); | |
1365 | GET_W(cbyte,lsw); | |
1366 | (&rrp->serial)[i]= (msw<<16) | lsw; | |
1367 | } | |
1368 | ||
1369 | return adns_s_ok; | |
1370 | } | |
1371 | ||
1372 | static void mf_soa(adns_query qu, void *datap) { | |
1373 | adns_rr_soa *rrp= datap; | |
1374 | ||
1375 | adns__makefinal_str(qu,&rrp->mname); | |
1376 | adns__makefinal_str(qu,&rrp->rname); | |
1377 | } | |
1378 | ||
1379 | static adns_status cs_soa(vbuf *vb, const void *datap) { | |
1380 | const adns_rr_soa *rrp= datap; | |
1381 | char buf[20]; | |
1382 | int i; | |
1383 | adns_status st; | |
1384 | ||
b365d68a | 1385 | st= csp_domain(vb,rrp->mname); if (st) return st; |
9ec44266 | 1386 | CSP_ADDSTR(" "); |
b365d68a | 1387 | st= csp_mailbox(vb,rrp->rname); if (st) return st; |
9ec44266 | 1388 | |
1389 | for (i=0; i<5; i++) { | |
1390 | sprintf(buf," %lu",(&rrp->serial)[i]); | |
1391 | CSP_ADDSTR(buf); | |
1392 | } | |
1393 | ||
1394 | return adns_s_ok; | |
1395 | } | |
1396 | ||
1397 | /* | |
e8e5aeac | 1398 | * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort) |
d19b03d0 | 1399 | */ |
1400 | ||
e8e5aeac MW |
1401 | static adns_status ckl_srv(adns_state ads, adns_queryflags flags, |
1402 | union checklabel_state *cls, qcontext *ctx, | |
1403 | int labnum, const char *label, int lablen) { | |
1404 | if (labnum < 2 && !(flags & adns_qf_quoteok_query)) { | |
1405 | if (!lablen || label[0] != '_') return adns_s_querydomaininvalid; | |
1406 | return adns_s_ok; | |
d19b03d0 | 1407 | } |
e8e5aeac | 1408 | return adns__ckl_hostname(ads, flags, cls, ctx, labnum, label, lablen); |
d19b03d0 | 1409 | } |
1410 | ||
05fc6b3a | 1411 | static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max, |
0e45654b | 1412 | adns_rr_srvha *rrp |
1413 | /* might be adns_rr_srvraw* */) { | |
401c256a | 1414 | const byte *dgram= pai->dgram; |
05fc6b3a | 1415 | int ti, cbyte; |
1416 | ||
1417 | cbyte= *cbyte_io; | |
1418 | if ((*cbyte_io += 6) > max) return adns_s_invaliddata; | |
401c256a | 1419 | |
1420 | rrp->priority= GET_W(cbyte, ti); | |
1421 | rrp->weight= GET_W(cbyte, ti); | |
1422 | rrp->port= GET_W(cbyte, ti); | |
1423 | return adns_s_ok; | |
1424 | } | |
1425 | ||
1426 | static adns_status pa_srvraw(const parseinfo *pai, int cbyte, | |
1427 | int max, void *datap) { | |
1428 | adns_rr_srvraw *rrp= datap; | |
1429 | adns_status st; | |
1430 | ||
05fc6b3a | 1431 | st= pap_srv_begin(pai,&cbyte,max,datap); |
401c256a | 1432 | if (st) return st; |
1433 | ||
1434 | st= pap_domain(pai, &cbyte, max, &rrp->host, | |
1435 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1436 | if (st) return st; | |
1437 | ||
1438 | if (cbyte != max) return adns_s_invaliddata; | |
1439 | return adns_s_ok; | |
1440 | } | |
1441 | ||
1442 | static adns_status pa_srvha(const parseinfo *pai, int cbyte, | |
1443 | int max, void *datap) { | |
1444 | adns_rr_srvha *rrp= datap; | |
1445 | adns_status st; | |
1446 | ||
05fc6b3a | 1447 | st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st; |
401c256a | 1448 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st; |
1449 | if (cbyte != max) return adns_s_invaliddata; | |
1450 | return adns_s_ok; | |
1451 | } | |
1452 | ||
1453 | static void mf_srvraw(adns_query qu, void *datap) { | |
1454 | adns_rr_srvraw *rrp= datap; | |
1455 | adns__makefinal_str(qu, &rrp->host); | |
1456 | } | |
1457 | ||
1458 | static void mf_srvha(adns_query qu, void *datap) { | |
1459 | adns_rr_srvha *rrp= datap; | |
1460 | mfp_hostaddr(qu,&rrp->ha); | |
1461 | } | |
1462 | ||
1463 | static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) { | |
1464 | const adns_rr_srvraw *ap= datap_a, *bp= datap_b; | |
1465 | /* might be const adns_rr_svhostaddr* */ | |
1466 | ||
1467 | if (ap->priority < bp->priority) return 0; | |
1468 | if (ap->priority > bp->priority) return 1; | |
1469 | return 0; | |
1470 | } | |
1471 | ||
0e45654b | 1472 | static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp |
1473 | /* might be adns_rr_srvraw* */) { | |
401c256a | 1474 | char buf[30]; |
1475 | sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port); | |
1476 | CSP_ADDSTR(buf); | |
1477 | return adns_s_ok; | |
1478 | } | |
1479 | ||
1480 | static adns_status cs_srvraw(vbuf *vb, const void *datap) { | |
1481 | const adns_rr_srvraw *rrp= datap; | |
1482 | adns_status st; | |
1483 | ||
0e45654b | 1484 | st= csp_srv_begin(vb,(const void*)rrp); if (st) return st; |
401c256a | 1485 | return csp_domain(vb,rrp->host); |
1486 | } | |
1487 | ||
1488 | static adns_status cs_srvha(vbuf *vb, const void *datap) { | |
1489 | const adns_rr_srvha *rrp= datap; | |
1490 | adns_status st; | |
1491 | ||
0e45654b | 1492 | st= csp_srv_begin(vb,(const void*)datap); if (st) return st; |
401c256a | 1493 | return csp_hostaddr(vb,&rrp->ha); |
1494 | } | |
1495 | ||
042b0909 | 1496 | static void postsort_srv(adns_state ads, void *array, int nrrs,int rrsz, |
d24e2a7e | 1497 | const struct typeinfo *typei) { |
0e45654b | 1498 | /* we treat everything in the array as if it were an adns_rr_srvha |
1499 | * even though the array might be of adns_rr_srvraw. That's OK | |
1500 | * because they have the same prefix, which is all we access. | |
042b0909 | 1501 | * We use rrsz, too, rather than naive array indexing, of course. |
0e45654b | 1502 | */ |
1503 | char *workbegin, *workend, *search, *arrayend; | |
1504 | const adns_rr_srvha *rr; | |
1505 | union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp; | |
1506 | int cpriority, totalweight, runtotal; | |
1507 | long randval; | |
1508 | ||
042b0909 MW |
1509 | assert(rrsz <= sizeof(rrtmp)); |
1510 | for (workbegin= array, arrayend= workbegin + rrsz * nrrs; | |
0e45654b | 1511 | workbegin < arrayend; |
1512 | workbegin= workend) { | |
1513 | cpriority= (rr=(void*)workbegin)->priority; | |
1514 | ||
1515 | for (workend= workbegin, totalweight= 0; | |
1516 | workend < arrayend && (rr=(void*)workend)->priority == cpriority; | |
042b0909 | 1517 | workend += rrsz) { |
0e45654b | 1518 | totalweight += rr->weight; |
0e45654b | 1519 | } |
1520 | ||
1521 | /* Now workbegin..(workend-1) incl. are exactly all of the RRs of | |
1522 | * cpriority. From now on, workbegin points to the `remaining' | |
1523 | * records: we select one record at a time (RFC2782 `Usage rules' | |
1524 | * and `Format of the SRV RR' subsection `Weight') to place at | |
1525 | * workbegin (swapping with the one that was there, and then | |
1526 | * advance workbegin. */ | |
1527 | for (; | |
042b0909 MW |
1528 | workbegin + rrsz < workend; /* don't bother if just one */ |
1529 | workbegin += rrsz) { | |
0e45654b | 1530 | |
1531 | randval= nrand48(ads->rand48xsubi); | |
1532 | randval %= (totalweight + 1); | |
0e45654b | 1533 | /* makes it into 0..totalweight inclusive; with 2^10 RRs, |
1534 | * totalweight must be <= 2^26 so probability nonuniformity is | |
1535 | * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie | |
1536 | * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5). | |
1537 | */ | |
1538 | ||
1539 | for (search=workbegin, runtotal=0; | |
1540 | (runtotal += (rr=(void*)search)->weight) < randval; | |
042b0909 | 1541 | search += rrsz); |
0e45654b | 1542 | assert(search < arrayend); |
1543 | totalweight -= rr->weight; | |
1544 | if (search != workbegin) { | |
042b0909 MW |
1545 | memcpy(&rrtmp, workbegin, rrsz); |
1546 | memcpy(workbegin, search, rrsz); | |
1547 | memcpy(search, &rrtmp, rrsz); | |
0e45654b | 1548 | } |
1549 | } | |
1550 | } | |
d24e2a7e | 1551 | /* tests: |
1552 | * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk. | |
1553 | * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk. | |
1554 | * ./adnshost_s -t srv- _jabber._tcp.jabber.org | |
1555 | */ | |
1556 | } | |
1557 | ||
d19b03d0 | 1558 | /* |
2c6eb096 | 1559 | * _byteblock (mf) |
1560 | */ | |
1561 | ||
1562 | static void mf_byteblock(adns_query qu, void *datap) { | |
1563 | adns_rr_byteblock *rrp= datap; | |
1564 | void *bytes= rrp->data; | |
1565 | adns__makefinal_block(qu,&bytes,rrp->len); | |
1566 | rrp->data= bytes; | |
1567 | } | |
1568 | ||
1569 | /* | |
1570 | * _opaque (pa,cs) | |
1571 | */ | |
1572 | ||
1573 | static adns_status pa_opaque(const parseinfo *pai, int cbyte, | |
1574 | int max, void *datap) { | |
1575 | adns_rr_byteblock *rrp= datap; | |
1576 | ||
1577 | rrp->len= max - cbyte; | |
1578 | rrp->data= adns__alloc_interim(pai->qu, rrp->len); | |
1579 | if (!rrp->data) R_NOMEM; | |
1580 | memcpy(rrp->data, pai->dgram + cbyte, rrp->len); | |
1581 | return adns_s_ok; | |
1582 | } | |
1583 | ||
1584 | static adns_status cs_opaque(vbuf *vb, const void *datap) { | |
1585 | const adns_rr_byteblock *rrp= datap; | |
1586 | char buf[10]; | |
1587 | int l; | |
1588 | unsigned char *p; | |
1589 | ||
1590 | sprintf(buf,"\\# %d",rrp->len); | |
1591 | CSP_ADDSTR(buf); | |
1592 | ||
1593 | for (l= rrp->len, p= rrp->data; | |
1594 | l>=4; | |
1595 | l -= 4, p += 4) { | |
1596 | sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]); | |
1597 | CSP_ADDSTR(buf); | |
1598 | } | |
1599 | for (; | |
1600 | l>0; | |
1601 | l--, p++) { | |
1602 | sprintf(buf," %02x",*p); | |
1603 | CSP_ADDSTR(buf); | |
1604 | } | |
1605 | return adns_s_ok; | |
1606 | } | |
1607 | ||
1608 | /* | |
eb81d633 | 1609 | * _flat (mf) |
1610 | */ | |
1611 | ||
ffbda80c | 1612 | static void mf_flat(adns_query qu, void *data) { } |
1613 | ||
eb81d633 | 1614 | /* |
1615 | * Now the table. | |
1616 | */ | |
1617 | ||
e062dcae | 1618 | #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member)) |
86e7b8d9 | 1619 | |
c5fd1fbb | 1620 | #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \ |
d24b603f | 1621 | { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_##memb, \ |
c5fd1fbb | 1622 | GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \ |
13826233 MW |
1623 | adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \ |
1624 | CDR(__VA_ARGS__) } | |
c5fd1fbb | 1625 | #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \ |
d24b603f | 1626 | { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_flat, \ |
c5fd1fbb | 1627 | GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \ |
13826233 MW |
1628 | adns__ckl_hostname, 0, adns__getrrsz_default, adns__query_send, \ |
1629 | CDR(__VA_ARGS__) } | |
c5fd1fbb MW |
1630 | |
1631 | #define di_0 0 | |
98a3f706 | 1632 | |
1633 | static const typeinfo typeinfos[] = { | |
eb81d633 | 1634 | /* Must be in ascending order of rrtype ! */ |
609133ee | 1635 | /* mem-mgmt code rrt fmt member parser comparer printer */ |
1636 | ||
c5fd1fbb MW |
1637 | FLAT_TYPE(a, "A", 0, inaddr, inaddr, inaddr,inaddr ), |
1638 | DEEP_TYPE(ns_raw, "NS", "raw",str, host_raw,0, domain ), | |
1639 | DEEP_TYPE(cname, "CNAME", 0, str, dom_raw, 0, domain ), | |
1640 | DEEP_TYPE(soa_raw,"SOA", "raw",soa, soa, 0, soa ), | |
1641 | DEEP_TYPE(ptr_raw,"PTR", "raw",str, host_raw,0, domain ), | |
1642 | DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,hinfo, 0, hinfo ), | |
1643 | DEEP_TYPE(mx_raw, "MX", "raw",intstr, mx_raw, mx_raw,inthost ), | |
1644 | DEEP_TYPE(txt, "TXT", 0, manyistr, txt, 0, txt ), | |
1645 | DEEP_TYPE(rp_raw, "RP", "raw",strpair, rp, 0, rp ), | |
50e2b0c3 | 1646 | FLAT_TYPE(aaaa, "AAAA", 0, in6addr, in6addr, in6addr,in6addr ), |
c5fd1fbb | 1647 | DEEP_TYPE(srv_raw,"SRV", "raw",srvraw , srvraw, srv, srvraw, |
e8e5aeac | 1648 | .checklabel= ckl_srv, .postsort= postsort_srv), |
c5fd1fbb | 1649 | |
b0a32b17 | 1650 | FLAT_TYPE(addr, "A", "addr", addr, addr, addr, addr, |
9d138734 | 1651 | .getrrsz= gsz_addr, .query_send= qs_addr), |
c5fd1fbb | 1652 | DEEP_TYPE(ns, "NS", "+addr",hostaddr, hostaddr,hostaddr,hostaddr ), |
938b0228 MW |
1653 | DEEP_TYPE(ptr, "PTR","checked",str, ptr, 0, domain, |
1654 | .checklabel= ckl_ptr), | |
c5fd1fbb MW |
1655 | DEEP_TYPE(mx, "MX", "+addr",inthostaddr,mx, mx, inthostaddr, ), |
1656 | DEEP_TYPE(srv, "SRV","+addr",srvha, srvha, srv, srvha, | |
e8e5aeac | 1657 | .checklabel= ckl_srv, .postsort= postsort_srv), |
c5fd1fbb MW |
1658 | |
1659 | DEEP_TYPE(soa, "SOA","822", soa, soa, 0, soa ), | |
1660 | DEEP_TYPE(rp, "RP", "822", strpair, rp, 0, rp ), | |
98a3f706 | 1661 | }; |
1662 | ||
9d138734 MW |
1663 | static const typeinfo tinfo_addrsub = |
1664 | FLAT_TYPE(none, "<addr>","sub",addr, addr, 0, addr, | |
1665 | .getrrsz= gsz_addr); | |
1666 | ||
2c6eb096 | 1667 | static const typeinfo typeinfo_unknown= |
c5fd1fbb | 1668 | DEEP_TYPE(unknown,0, "unknown",byteblock,opaque, 0, opaque ); |
2c6eb096 | 1669 | |
f759e52e | 1670 | const typeinfo *adns__findtype(adns_rrtype type) { |
1671 | const typeinfo *begin, *end, *mid; | |
98a3f706 | 1672 | |
2c6eb096 | 1673 | if (type & adns_r_unknown) return &typeinfo_unknown; |
d24b603f | 1674 | type &= adns_rrt_reprmask; |
2c6eb096 | 1675 | |
98a3f706 | 1676 | begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo)); |
1677 | ||
1678 | while (begin < end) { | |
1679 | mid= begin + ((end-begin)>>1); | |
2c6eb096 | 1680 | if (mid->typekey == type) return mid; |
1681 | if (type > mid->typekey) begin= mid+1; | |
98a3f706 | 1682 | else end= mid; |
1683 | } | |
1684 | return 0; | |
1685 | } |