Commit | Line | Data |
---|---|---|
98db6da3 | 1 | /* |
2 | * query.c | |
3 | * - overall query management (allocation, completion) | |
4 | * - per-query memory management | |
5 | * - query submission and cancellation (user-visible and internal) | |
6 | */ | |
7 | /* | |
39f45e7e | 8 | * This file is part of adns, which is |
9 | * Copyright (C) 1997-2000,2003,2006 Ian Jackson | |
10 | * Copyright (C) 1999-2000,2003,2006 Tony Finch | |
11 | * Copyright (C) 1991 Massachusetts Institute of Technology | |
12 | * (See the file INSTALL for full details.) | |
98db6da3 | 13 | * |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2, or (at your option) | |
17 | * any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License | |
25 | * along with this program; if not, write to the Free Software Foundation, | |
26 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
27 | */ | |
d05cc330 | 28 | |
48cb0b4b | 29 | #include "internal.h" |
6f17710a | 30 | |
98db6da3 | 31 | #include <stdlib.h> |
32 | #include <unistd.h> | |
33 | #include <errno.h> | |
6f17710a | 34 | |
98db6da3 | 35 | #include <sys/time.h> |
6f17710a | 36 | |
98db6da3 | 37 | #include "internal.h" |
96e79df5 | 38 | |
7d0aaee4 | 39 | static adns_query query_alloc(adns_state ads, |
40 | const typeinfo *typei, adns_rrtype type, | |
7e6a84a1 | 41 | adns_queryflags flags, struct timeval now) { |
42 | /* Allocate a virgin query and return it. */ | |
98db6da3 | 43 | adns_query qu; |
7e6a84a1 | 44 | |
45 | qu= malloc(sizeof(*qu)); if (!qu) return 0; | |
9c344a42 | 46 | qu->answer= malloc(sizeof(*qu->answer)); |
47 | if (!qu->answer) { free(qu); return 0; } | |
7e6a84a1 | 48 | |
11c8bf9b | 49 | qu->ads= ads; |
24d52b13 | 50 | qu->state= query_tosend; |
98db6da3 | 51 | qu->back= qu->next= qu->parent= 0; |
52 | LIST_INIT(qu->children); | |
7e6a84a1 | 53 | LINK_INIT(qu->siblings); |
bc01473e | 54 | LIST_INIT(qu->allocations); |
98db6da3 | 55 | qu->interim_allocd= 0; |
1be24aef | 56 | qu->preserved_allocd= 0; |
11c8bf9b | 57 | qu->final_allocspace= 0; |
98db6da3 | 58 | |
11c8bf9b | 59 | qu->typei= typei; |
7e6a84a1 | 60 | qu->query_dgram= 0; |
61 | qu->query_dglen= 0; | |
98db6da3 | 62 | adns__vbuf_init(&qu->vb); |
63 | ||
64 | qu->cname_dgram= 0; | |
65 | qu->cname_dglen= qu->cname_begin= 0; | |
7e6a84a1 | 66 | |
67 | adns__vbuf_init(&qu->search_vb); | |
68 | qu->search_origlen= qu->search_pos= qu->search_doneabs= 0; | |
69 | ||
8744cce8 | 70 | qu->id= -2; /* will be overwritten with real id before we leave adns */ |
98db6da3 | 71 | qu->flags= flags; |
d0a057ac | 72 | qu->retries= 0; |
98db6da3 | 73 | qu->udpnextserver= 0; |
d0a057ac | 74 | qu->udpsent= 0; |
98db6da3 | 75 | timerclear(&qu->timeout); |
2c7b101b | 76 | qu->expires= now.tv_sec + MAXTTLBELIEVE; |
98db6da3 | 77 | |
7e6a84a1 | 78 | memset(&qu->ctx,0,sizeof(qu->ctx)); |
79 | ||
98db6da3 | 80 | qu->answer->status= adns_s_ok; |
b2988d3e | 81 | qu->answer->cname= qu->answer->owner= 0; |
7d0aaee4 | 82 | qu->answer->type= type; |
7e6a84a1 | 83 | qu->answer->expires= -1; |
98db6da3 | 84 | qu->answer->nrrs= 0; |
763d28b9 | 85 | qu->answer->rrs.untyped= 0; |
11c8bf9b | 86 | qu->answer->rrsz= typei->rrsz; |
96e79df5 | 87 | |
7e6a84a1 | 88 | return qu; |
89 | } | |
90 | ||
91 | static void query_submit(adns_state ads, adns_query qu, | |
92 | const typeinfo *typei, vbuf *qumsg_vb, int id, | |
93 | adns_queryflags flags, struct timeval now) { | |
94 | /* Fills in the query message in for a previously-allocated query, | |
fc86e61f | 95 | * and submits it. Cannot fail. Takes over the memory for qumsg_vb. |
7e6a84a1 | 96 | */ |
97 | ||
98db6da3 | 98 | qu->vb= *qumsg_vb; |
99 | adns__vbuf_init(qumsg_vb); | |
7e6a84a1 | 100 | |
101 | qu->query_dgram= malloc(qu->vb.used); | |
102 | if (!qu->query_dgram) { adns__query_fail(qu,adns_s_nomemory); return; } | |
103 | ||
104 | qu->id= id; | |
105 | qu->query_dglen= qu->vb.used; | |
106 | memcpy(qu->query_dgram,qu->vb.buf,qu->vb.used); | |
5f8085b7 | 107 | |
bcfd6f13 MW |
108 | if (flags & adns__qf_nosend) |
109 | ; | |
110 | else if (typei->query_send && !(flags & adns__qf_senddirect)) | |
5f8085b7 MW |
111 | typei->query_send(qu,now); |
112 | else | |
113 | adns__query_send(qu, now); | |
7e6a84a1 | 114 | } |
115 | ||
116 | adns_status adns__internal_submit(adns_state ads, adns_query *query_r, | |
5f8085b7 MW |
117 | const typeinfo *typei, adns_rrtype type, |
118 | vbuf *qumsg_vb, int id, | |
7e6a84a1 | 119 | adns_queryflags flags, struct timeval now, |
120 | const qcontext *ctx) { | |
121 | adns_query qu; | |
122 | ||
bcfd6f13 | 123 | qu= query_alloc(ads,typei,type,flags & ~adns__qf_nosend,now); |
7e6a84a1 | 124 | if (!qu) { adns__vbuf_free(qumsg_vb); return adns_s_nomemory; } |
125 | *query_r= qu; | |
98db6da3 | 126 | |
7e6a84a1 | 127 | memcpy(&qu->ctx,ctx,sizeof(qu->ctx)); |
128 | query_submit(ads,qu, typei,qumsg_vb,id,flags,now); | |
129 | ||
11c8bf9b | 130 | return adns_s_ok; |
7e6a84a1 | 131 | } |
132 | ||
133 | static void query_simple(adns_state ads, adns_query qu, | |
134 | const char *owner, int ol, | |
135 | const typeinfo *typei, adns_queryflags flags, | |
136 | struct timeval now) { | |
a880d9ba | 137 | vbuf vb_new; |
7e6a84a1 | 138 | int id; |
139 | adns_status stat; | |
98db6da3 | 140 | |
7d0aaee4 | 141 | stat= adns__mkquery(ads,&qu->vb,&id, owner,ol, |
142 | typei,qu->answer->type, flags); | |
a880d9ba | 143 | if (stat) { |
144 | if (stat == adns_s_querydomaintoolong && (flags & adns_qf_search)) { | |
145 | adns__search_next(ads,qu,now); | |
146 | return; | |
147 | } else { | |
148 | adns__query_fail(qu,stat); | |
149 | return; | |
150 | } | |
151 | } | |
152 | ||
153 | vb_new= qu->vb; | |
154 | adns__vbuf_init(&qu->vb); | |
155 | query_submit(ads,qu, typei,&vb_new,id, flags,now); | |
7e6a84a1 | 156 | } |
157 | ||
158 | void adns__search_next(adns_state ads, adns_query qu, struct timeval now) { | |
159 | const char *nextentry; | |
160 | adns_status stat; | |
161 | ||
162 | if (qu->search_doneabs<0) { | |
163 | nextentry= 0; | |
164 | qu->search_doneabs= 1; | |
165 | } else { | |
166 | if (qu->search_pos >= ads->nsearchlist) { | |
167 | if (qu->search_doneabs) { | |
85021e18 | 168 | qu->search_vb.used= qu->search_origlen; |
7e6a84a1 | 169 | stat= adns_s_nxdomain; goto x_fail; |
7e6a84a1 | 170 | } else { |
171 | nextentry= 0; | |
172 | qu->search_doneabs= 1; | |
173 | } | |
174 | } else { | |
175 | nextentry= ads->searchlist[qu->search_pos++]; | |
176 | } | |
177 | } | |
178 | ||
a5da6822 | 179 | qu->search_vb.used= qu->search_origlen; |
7e6a84a1 | 180 | if (nextentry) { |
181 | if (!adns__vbuf_append(&qu->search_vb,".",1) || | |
85021e18 | 182 | !adns__vbuf_appendstr(&qu->search_vb,nextentry)) |
183 | goto x_nomemory; | |
7e6a84a1 | 184 | } |
185 | ||
186 | free(qu->query_dgram); | |
187 | qu->query_dgram= 0; qu->query_dglen= 0; | |
188 | ||
9c344a42 | 189 | query_simple(ads,qu, qu->search_vb.buf, qu->search_vb.used, |
190 | qu->typei, qu->flags, now); | |
7e6a84a1 | 191 | return; |
85021e18 | 192 | |
193 | x_nomemory: | |
194 | stat= adns_s_nomemory; | |
7e6a84a1 | 195 | x_fail: |
196 | adns__query_fail(qu,stat); | |
48cb0b4b | 197 | } |
198 | ||
b2988d3e | 199 | static int save_owner(adns_query qu, const char *owner, int ol) { |
200 | /* Returns 1 if OK, otherwise there was no memory. */ | |
201 | adns_answer *ans; | |
202 | ||
85021e18 | 203 | if (!(qu->flags & adns_qf_owner)) return 1; |
204 | ||
b2988d3e | 205 | ans= qu->answer; |
206 | assert(!ans->owner); | |
207 | ||
1be24aef | 208 | ans->owner= adns__alloc_preserved(qu,ol+1); if (!ans->owner) return 0; |
b2988d3e | 209 | |
210 | memcpy(ans->owner,owner,ol); | |
211 | ans->owner[ol]= 0; | |
212 | return 1; | |
213 | } | |
214 | ||
98db6da3 | 215 | int adns_submit(adns_state ads, |
216 | const char *owner, | |
217 | adns_rrtype type, | |
edb95764 | 218 | adns_queryflags flags, |
98db6da3 | 219 | void *context, |
220 | adns_query *query_r) { | |
7e6a84a1 | 221 | int r, ol, ndots; |
11c8bf9b | 222 | adns_status stat; |
223 | const typeinfo *typei; | |
224 | struct timeval now; | |
7e6a84a1 | 225 | adns_query qu; |
226 | const char *p; | |
98db6da3 | 227 | |
2ac463bf | 228 | adns__consistency(ads,0,cc_entex); |
1389dc72 | 229 | |
5f8085b7 MW |
230 | if (!(type & adns__qtf_bigaddr) || !(type & adns__qtf_manyaf)) |
231 | flags = (flags & ~adns__qf_afmask) | adns_qf_ipv4_only; | |
232 | ||
11c8bf9b | 233 | typei= adns__findtype(type); |
125de2a9 | 234 | if (!typei) return ENOSYS; |
98db6da3 | 235 | |
7e6a84a1 | 236 | r= gettimeofday(&now,0); if (r) goto x_errno; |
7d0aaee4 | 237 | qu= query_alloc(ads,typei,type,flags,now); if (!qu) goto x_errno; |
7e6a84a1 | 238 | |
239 | qu->ctx.ext= context; | |
240 | qu->ctx.callback= 0; | |
241 | memset(&qu->ctx.info,0,sizeof(qu->ctx.info)); | |
98db6da3 | 242 | |
a5da6822 | 243 | *query_r= qu; |
244 | ||
98db6da3 | 245 | ol= strlen(owner); |
7e6a84a1 | 246 | if (!ol) { stat= adns_s_querydomaininvalid; goto x_adnsfail; } |
247 | if (ol>DNS_MAXDOMAIN+1) { stat= adns_s_querydomaintoolong; goto x_adnsfail; } | |
98db6da3 | 248 | |
7683abe2 | 249 | if (ol>=1 && owner[ol-1]=='.' && (ol<2 || owner[ol-2]!='\\')) { |
250 | flags &= ~adns_qf_search; | |
30c317a4 | 251 | qu->flags= flags; |
7683abe2 | 252 | ol--; |
253 | } | |
98db6da3 | 254 | |
7e6a84a1 | 255 | if (flags & adns_qf_search) { |
256 | r= adns__vbuf_append(&qu->search_vb,owner,ol); | |
257 | if (!r) { stat= adns_s_nomemory; goto x_adnsfail; } | |
258 | ||
259 | for (ndots=0, p=owner; (p= strchr(p,'.')); p++, ndots++); | |
260 | qu->search_doneabs= (ndots >= ads->searchndots) ? -1 : 0; | |
7e6a84a1 | 261 | qu->search_origlen= ol; |
7e6a84a1 | 262 | adns__search_next(ads,qu,now); |
a5da6822 | 263 | } else { |
b2988d3e | 264 | if (flags & adns_qf_owner) { |
265 | if (!save_owner(qu,owner,ol)) { stat= adns_s_nomemory; goto x_adnsfail; } | |
266 | } | |
a5da6822 | 267 | query_simple(ads,qu, owner,ol, typei,flags, now); |
7e6a84a1 | 268 | } |
ab898cf4 | 269 | adns__autosys(ads,now); |
2ac463bf | 270 | adns__consistency(ads,qu,cc_entex); |
7e6a84a1 | 271 | return 0; |
272 | ||
273 | x_adnsfail: | |
274 | adns__query_fail(qu,stat); | |
2ac463bf | 275 | adns__consistency(ads,qu,cc_entex); |
7e6a84a1 | 276 | return 0; |
277 | ||
278 | x_errno: | |
279 | r= errno; | |
280 | assert(r); | |
2ac463bf | 281 | adns__consistency(ads,0,cc_entex); |
7e6a84a1 | 282 | return r; |
96e79df5 | 283 | } |
284 | ||
8a53cf7f MW |
285 | static const char *default_zone = "<magic>"; |
286 | ||
d2f6d877 | 287 | int adns_submit_reverse_any(adns_state ads, |
288 | const struct sockaddr *addr, | |
289 | const char *zone, | |
290 | adns_rrtype type, | |
291 | adns_queryflags flags, | |
292 | void *context, | |
293 | adns_query *query_r) { | |
8a53cf7f | 294 | char *buf, *buf_free, *p; |
d2f6d877 | 295 | char shortbuf[100]; |
8a53cf7f | 296 | const afinfo *ai; |
d2f6d877 | 297 | int r, lreq; |
5e6342f0 | 298 | |
5e6342f0 | 299 | flags &= ~adns_qf_search; |
300 | ||
8a53cf7f MW |
301 | switch (addr->sa_family) { |
302 | case AF_INET: | |
303 | ai = &adns__inet_afinfo; | |
304 | if (zone == default_zone) zone = "in-addr.arpa"; | |
305 | break; | |
306 | case AF_INET6: | |
307 | ai = &adns__inet6_afinfo; | |
308 | if (zone == default_zone) zone = "ip6.arpa"; | |
309 | break; | |
310 | default: | |
311 | return ENOSYS; | |
312 | } | |
5e6342f0 | 313 | |
8a53cf7f | 314 | lreq= strlen(zone) + ai->nrevcomp*(ai->revcompwd + 1) + 1; |
d2f6d877 | 315 | if (lreq > sizeof(shortbuf)) { |
8a53cf7f | 316 | buf= malloc(lreq); |
d2f6d877 | 317 | if (!buf) return errno; |
318 | buf_free= buf; | |
319 | } else { | |
320 | buf= shortbuf; | |
321 | buf_free= 0; | |
322 | } | |
8a53cf7f MW |
323 | |
324 | p = ai->rev_mkname(addr, buf); | |
325 | *p++ = '.'; | |
326 | strcpy(p, zone); | |
5e6342f0 | 327 | |
d2f6d877 | 328 | r= adns_submit(ads,buf,type,flags,context,query_r); |
329 | free(buf_free); | |
330 | return r; | |
331 | } | |
332 | ||
333 | int adns_submit_reverse(adns_state ads, | |
334 | const struct sockaddr *addr, | |
335 | adns_rrtype type, | |
336 | adns_queryflags flags, | |
337 | void *context, | |
338 | adns_query *query_r) { | |
339 | if (type != adns_r_ptr && type != adns_r_ptr_raw) return EINVAL; | |
8a53cf7f | 340 | return adns_submit_reverse_any(ads,addr,default_zone, |
9c344a42 | 341 | type,flags,context,query_r); |
5e6342f0 | 342 | } |
343 | ||
98db6da3 | 344 | int adns_synchronous(adns_state ads, |
345 | const char *owner, | |
346 | adns_rrtype type, | |
edb95764 | 347 | adns_queryflags flags, |
98db6da3 | 348 | adns_answer **answer_r) { |
349 | adns_query qu; | |
350 | int r; | |
351 | ||
352 | r= adns_submit(ads,owner,type,flags,0,&qu); | |
353 | if (r) return r; | |
48cb0b4b | 354 | |
f318f883 | 355 | r= adns_wait(ads,&qu,answer_r,0); |
11c8bf9b | 356 | if (r) adns_cancel(qu); |
96e79df5 | 357 | |
f318f883 | 358 | return r; |
98db6da3 | 359 | } |
360 | ||
c9afe7bb | 361 | static void *alloc_common(adns_query qu, size_t sz) { |
98db6da3 | 362 | allocnode *an; |
363 | ||
f47cdeec | 364 | if (!sz) return qu; /* Any old pointer will do */ |
98db6da3 | 365 | assert(!qu->final_allocspace); |
98db6da3 | 366 | an= malloc(MEM_ROUND(MEM_ROUND(sizeof(*an)) + sz)); |
f2ad23ee | 367 | if (!an) return 0; |
bc01473e | 368 | LIST_LINK_TAIL(qu->allocations,an); |
5f8085b7 | 369 | an->sz = sz; |
98db6da3 | 370 | return (byte*)an + MEM_ROUND(sizeof(*an)); |
371 | } | |
48cb0b4b | 372 | |
c9afe7bb | 373 | void *adns__alloc_interim(adns_query qu, size_t sz) { |
1be24aef | 374 | void *rv; |
375 | ||
c9afe7bb | 376 | sz= MEM_ROUND(sz); |
1be24aef | 377 | rv= alloc_common(qu,sz); |
378 | if (!rv) return 0; | |
c9afe7bb | 379 | qu->interim_allocd += sz; |
1be24aef | 380 | return rv; |
381 | } | |
382 | ||
383 | void *adns__alloc_preserved(adns_query qu, size_t sz) { | |
384 | void *rv; | |
385 | ||
386 | sz= MEM_ROUND(sz); | |
387 | rv= adns__alloc_interim(qu,sz); | |
388 | if (!rv) return 0; | |
389 | qu->preserved_allocd += sz; | |
390 | return rv; | |
c9afe7bb | 391 | } |
392 | ||
5f8085b7 MW |
393 | void adns__free_interim(adns_query qu, void *p) { |
394 | allocnode *an; | |
395 | size_t sz; | |
396 | ||
397 | if (!p) return; | |
398 | an = (allocnode *)((byte *)p - MEM_ROUND(sizeof(allocnode))); | |
399 | sz = MEM_ROUND(an->sz); | |
400 | LIST_UNLINK(qu->allocations, an); | |
401 | free(an); | |
402 | qu->interim_allocd -= sz; | |
403 | } | |
404 | ||
c9afe7bb | 405 | void *adns__alloc_mine(adns_query qu, size_t sz) { |
406 | return alloc_common(qu,MEM_ROUND(sz)); | |
407 | } | |
408 | ||
9c344a42 | 409 | void adns__transfer_interim(adns_query from, adns_query to, |
410 | void *block, size_t sz) { | |
bc01473e | 411 | allocnode *an; |
412 | ||
413 | if (!block) return; | |
414 | an= (void*)((byte*)block - MEM_ROUND(sizeof(*an))); | |
415 | ||
416 | assert(!to->final_allocspace); | |
417 | assert(!from->final_allocspace); | |
418 | ||
419 | LIST_UNLINK(from->allocations,an); | |
420 | LIST_LINK_TAIL(to->allocations,an); | |
421 | ||
647d5ec1 | 422 | sz= MEM_ROUND(sz); |
bc01473e | 423 | from->interim_allocd -= sz; |
424 | to->interim_allocd += sz; | |
2c7b101b | 425 | |
426 | if (to->expires > from->expires) to->expires= from->expires; | |
bc01473e | 427 | } |
428 | ||
98db6da3 | 429 | void *adns__alloc_final(adns_query qu, size_t sz) { |
430 | /* When we're in the _final stage, we _subtract_ from interim_alloc'd | |
431 | * each allocation, and use final_allocspace to point to the next free | |
432 | * bit. | |
433 | */ | |
434 | void *rp; | |
435 | ||
436 | sz= MEM_ROUND(sz); | |
437 | rp= qu->final_allocspace; | |
438 | assert(rp); | |
439 | qu->interim_allocd -= sz; | |
440 | assert(qu->interim_allocd>=0); | |
441 | qu->final_allocspace= (byte*)rp + sz; | |
442 | return rp; | |
443 | } | |
444 | ||
5f8085b7 | 445 | void adns__cancel_children(adns_query qu) { |
61093792 | 446 | adns_query cqu, ncqu; |
447 | ||
448 | for (cqu= qu->children.head; cqu; cqu= ncqu) { | |
449 | ncqu= cqu->siblings.next; | |
450 | adns_cancel(cqu); | |
451 | } | |
61093792 | 452 | } |
453 | ||
1be24aef | 454 | void adns__reset_preserved(adns_query qu) { |
9a2b67d4 | 455 | assert(!qu->final_allocspace); |
5f8085b7 | 456 | adns__cancel_children(qu); |
98db6da3 | 457 | qu->answer->nrrs= 0; |
763d28b9 | 458 | qu->answer->rrs.untyped= 0; |
1be24aef | 459 | qu->interim_allocd= qu->preserved_allocd; |
d05cc330 | 460 | } |
461 | ||
f318f883 | 462 | static void free_query_allocs(adns_query qu) { |
463 | allocnode *an, *ann; | |
f318f883 | 464 | |
5f8085b7 | 465 | adns__cancel_children(qu); |
bc01473e | 466 | for (an= qu->allocations.head; an; an= ann) { ann= an->next; free(an); } |
9f1041a6 | 467 | LIST_INIT(qu->allocations); |
f318f883 | 468 | adns__vbuf_free(&qu->vb); |
fc86e61f | 469 | adns__vbuf_free(&qu->search_vb); |
b8d9a971 | 470 | free(qu->query_dgram); |
d94fa362 | 471 | qu->query_dgram= 0; |
f318f883 | 472 | } |
473 | ||
26eb6bdc | 474 | void adns_cancel(adns_query qu) { |
1389dc72 | 475 | adns_state ads; |
476 | ||
477 | ads= qu->ads; | |
2ac463bf | 478 | adns__consistency(ads,qu,cc_entex); |
0b772fb9 | 479 | if (qu->parent) LIST_UNLINK_PART(qu->parent->children,qu,siblings.); |
f318f883 | 480 | switch (qu->state) { |
d0a057ac | 481 | case query_tosend: |
482 | LIST_UNLINK(ads->udpw,qu); | |
f318f883 | 483 | break; |
d0a057ac | 484 | case query_tcpw: |
485 | LIST_UNLINK(ads->tcpw,qu); | |
486 | break; | |
487 | case query_childw: | |
1389dc72 | 488 | LIST_UNLINK(ads->childw,qu); |
f318f883 | 489 | break; |
490 | case query_done: | |
1389dc72 | 491 | LIST_UNLINK(ads->output,qu); |
f318f883 | 492 | break; |
493 | default: | |
494 | abort(); | |
495 | } | |
496 | free_query_allocs(qu); | |
497 | free(qu->answer); | |
498 | free(qu); | |
2ac463bf | 499 | adns__consistency(ads,0,cc_entex); |
f318f883 | 500 | } |
bc01473e | 501 | |
9c344a42 | 502 | void adns__update_expires(adns_query qu, unsigned long ttl, |
503 | struct timeval now) { | |
2c7b101b | 504 | time_t max; |
505 | ||
506 | assert(ttl <= MAXTTLBELIEVE); | |
507 | max= now.tv_sec + ttl; | |
508 | if (qu->expires < max) return; | |
509 | qu->expires= max; | |
510 | } | |
511 | ||
bc01473e | 512 | static void makefinal_query(adns_query qu) { |
5c596e4d | 513 | adns_answer *ans; |
f318f883 | 514 | int rrn; |
965c9782 | 515 | |
f318f883 | 516 | ans= qu->answer; |
bc01473e | 517 | |
f318f883 | 518 | if (qu->interim_allocd) { |
9c344a42 | 519 | ans= realloc(qu->answer, |
520 | MEM_ROUND(MEM_ROUND(sizeof(*ans)) + qu->interim_allocd)); | |
bc01473e | 521 | if (!ans) goto x_nomem; |
f2ad23ee | 522 | qu->answer= ans; |
523 | } | |
965c9782 | 524 | |
f318f883 | 525 | qu->final_allocspace= (byte*)ans + MEM_ROUND(sizeof(*ans)); |
965c9782 | 526 | adns__makefinal_str(qu,&ans->cname); |
b2988d3e | 527 | adns__makefinal_str(qu,&ans->owner); |
f318f883 | 528 | |
965c9782 | 529 | if (ans->nrrs) { |
f318f883 | 530 | adns__makefinal_block(qu, &ans->rrs.untyped, ans->nrrs*ans->rrsz); |
965c9782 | 531 | |
f318f883 | 532 | for (rrn=0; rrn<ans->nrrs; rrn++) |
533 | qu->typei->makefinal(qu, ans->rrs.bytes + rrn*ans->rrsz); | |
f318f883 | 534 | } |
2c7b101b | 535 | |
f318f883 | 536 | free_query_allocs(qu); |
bc01473e | 537 | return; |
965c9782 | 538 | |
bc01473e | 539 | x_nomem: |
1be24aef | 540 | qu->preserved_allocd= 0; |
bc01473e | 541 | qu->answer->cname= 0; |
1be24aef | 542 | qu->answer->owner= 0; |
543 | adns__reset_preserved(qu); /* (but we just threw away the preserved stuff) */ | |
544 | ||
545 | qu->answer->status= adns_s_nomemory; | |
bc01473e | 546 | free_query_allocs(qu); |
547 | } | |
548 | ||
549 | void adns__query_done(adns_query qu) { | |
550 | adns_answer *ans; | |
551 | adns_query parent; | |
552 | ||
5f8085b7 | 553 | adns__cancel_children(qu); |
cb32030b | 554 | |
d05cc330 | 555 | qu->id= -1; |
bc01473e | 556 | ans= qu->answer; |
557 | ||
85021e18 | 558 | if (qu->flags & adns_qf_search && ans->status != adns_s_nomemory) { |
b2988d3e | 559 | if (!save_owner(qu, qu->search_vb.buf, qu->search_vb.used)) { |
560 | adns__query_fail(qu,adns_s_nomemory); | |
561 | return; | |
562 | } | |
563 | } | |
564 | ||
bc01473e | 565 | if (ans->nrrs && qu->typei->diff_needswap) { |
5f8085b7 | 566 | if (!adns__vbuf_ensure(&qu->vb,ans->rrsz)) { |
9b86645c | 567 | adns__query_fail(qu,adns_s_nomemory); |
bc01473e | 568 | return; |
569 | } | |
570 | adns__isort(ans->rrs.bytes, ans->nrrs, ans->rrsz, | |
8c3aa944 | 571 | qu->vb.buf, |
9c344a42 | 572 | (int(*)(void*, const void*, const void*)) |
573 | qu->typei->diff_needswap, | |
8c3aa944 | 574 | qu->ads); |
bc01473e | 575 | } |
59d05d1c | 576 | if (ans->nrrs && qu->typei->postsort) { |
577 | qu->typei->postsort(qu->ads, ans->rrs.bytes, ans->nrrs, qu->typei); | |
578 | } | |
a095483e | 579 | |
2c7b101b | 580 | ans->expires= qu->expires; |
bc01473e | 581 | parent= qu->parent; |
582 | if (parent) { | |
583 | LIST_UNLINK_PART(parent->children,qu,siblings.); | |
cb32030b | 584 | LIST_UNLINK(qu->ads->childw,parent); |
cd1bde2f | 585 | qu->ctx.callback(parent,qu); |
bc01473e | 586 | free_query_allocs(qu); |
b8d9a971 | 587 | free(qu->answer); |
bc01473e | 588 | free(qu); |
bc01473e | 589 | } else { |
590 | makefinal_query(qu); | |
591 | LIST_LINK_TAIL(qu->ads->output,qu); | |
0b772fb9 | 592 | qu->state= query_done; |
bc01473e | 593 | } |
6f17710a | 594 | } |
595 | ||
11c8bf9b | 596 | void adns__query_fail(adns_query qu, adns_status stat) { |
1be24aef | 597 | adns__reset_preserved(qu); |
965c9782 | 598 | qu->answer->status= stat; |
11c8bf9b | 599 | adns__query_done(qu); |
6f17710a | 600 | } |
98db6da3 | 601 | |
602 | void adns__makefinal_str(adns_query qu, char **strp) { | |
603 | int l; | |
604 | char *before, *after; | |
605 | ||
606 | before= *strp; | |
9a2b67d4 | 607 | if (!before) return; |
98db6da3 | 608 | l= strlen(before)+1; |
609 | after= adns__alloc_final(qu,l); | |
610 | memcpy(after,before,l); | |
611 | *strp= after; | |
612 | } | |
613 | ||
11c8bf9b | 614 | void adns__makefinal_block(adns_query qu, void **blpp, size_t sz) { |
9a2b67d4 | 615 | void *before, *after; |
98db6da3 | 616 | |
9a2b67d4 | 617 | before= *blpp; |
618 | if (!before) return; | |
98db6da3 | 619 | after= adns__alloc_final(qu,sz); |
9a2b67d4 | 620 | memcpy(after,before,sz); |
98db6da3 | 621 | *blpp= after; |
622 | } |