e576be50 |
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 | /* |
ae8cc977 |
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.) |
e576be50 |
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 | */ |
4353a5c4 |
28 | |
4bec51a4 |
29 | #include "internal.h" |
656b2da9 |
30 | |
e576be50 |
31 | #include <stdlib.h> |
32 | #include <unistd.h> |
33 | #include <errno.h> |
656b2da9 |
34 | |
e576be50 |
35 | #include <sys/time.h> |
656b2da9 |
36 | |
e576be50 |
37 | #include "internal.h" |
ddfda861 |
38 | |
2c6eb096 |
39 | static adns_query query_alloc(adns_state ads, |
40 | const typeinfo *typei, adns_rrtype type, |
660d7d3b |
41 | adns_queryflags flags, struct timeval now) { |
42 | /* Allocate a virgin query and return it. */ |
e576be50 |
43 | adns_query qu; |
660d7d3b |
44 | |
45 | qu= malloc(sizeof(*qu)); if (!qu) return 0; |
609133ee |
46 | qu->answer= malloc(sizeof(*qu->answer)); |
47 | if (!qu->answer) { free(qu); return 0; } |
660d7d3b |
48 | |
3955725c |
49 | qu->ads= ads; |
d8c062fa |
50 | qu->state= query_tosend; |
e576be50 |
51 | qu->back= qu->next= qu->parent= 0; |
52 | LIST_INIT(qu->children); |
660d7d3b |
53 | LINK_INIT(qu->siblings); |
551ff40f |
54 | LIST_INIT(qu->allocations); |
e576be50 |
55 | qu->interim_allocd= 0; |
8b3d55e3 |
56 | qu->preserved_allocd= 0; |
3955725c |
57 | qu->final_allocspace= 0; |
e576be50 |
58 | |
3955725c |
59 | qu->typei= typei; |
660d7d3b |
60 | qu->query_dgram= 0; |
61 | qu->query_dglen= 0; |
e576be50 |
62 | adns__vbuf_init(&qu->vb); |
63 | |
64 | qu->cname_dgram= 0; |
65 | qu->cname_dglen= qu->cname_begin= 0; |
660d7d3b |
66 | |
67 | adns__vbuf_init(&qu->search_vb); |
68 | qu->search_origlen= qu->search_pos= qu->search_doneabs= 0; |
69 | |
4fad263d |
70 | qu->id= -2; /* will be overwritten with real id before we leave adns */ |
e576be50 |
71 | qu->flags= flags; |
f7f83b4a |
72 | qu->retries= 0; |
e576be50 |
73 | qu->udpnextserver= 0; |
f7f83b4a |
74 | qu->udpsent= 0; |
e576be50 |
75 | timerclear(&qu->timeout); |
73dba56e |
76 | qu->expires= now.tv_sec + MAXTTLBELIEVE; |
e576be50 |
77 | |
660d7d3b |
78 | memset(&qu->ctx,0,sizeof(qu->ctx)); |
79 | |
e576be50 |
80 | qu->answer->status= adns_s_ok; |
22181a31 |
81 | qu->answer->cname= qu->answer->owner= 0; |
2c6eb096 |
82 | qu->answer->type= type; |
660d7d3b |
83 | qu->answer->expires= -1; |
e576be50 |
84 | qu->answer->nrrs= 0; |
71a6ff46 |
85 | qu->answer->rrs.untyped= 0; |
3955725c |
86 | qu->answer->rrsz= typei->rrsz; |
ddfda861 |
87 | |
660d7d3b |
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, |
914a5ff5 |
95 | * and submits it. Cannot fail. Takes over the memory for qumsg_vb. |
660d7d3b |
96 | */ |
97 | |
e576be50 |
98 | qu->vb= *qumsg_vb; |
99 | adns__vbuf_init(qumsg_vb); |
660d7d3b |
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); |
e576be50 |
107 | |
d8c062fa |
108 | adns__query_send(qu,now); |
660d7d3b |
109 | } |
110 | |
111 | adns_status adns__internal_submit(adns_state ads, adns_query *query_r, |
609133ee |
112 | const typeinfo *typei, vbuf *qumsg_vb, |
113 | int id, |
660d7d3b |
114 | adns_queryflags flags, struct timeval now, |
115 | const qcontext *ctx) { |
116 | adns_query qu; |
117 | |
2c6eb096 |
118 | qu= query_alloc(ads,typei,typei->typekey,flags,now); |
660d7d3b |
119 | if (!qu) { adns__vbuf_free(qumsg_vb); return adns_s_nomemory; } |
120 | *query_r= qu; |
e576be50 |
121 | |
660d7d3b |
122 | memcpy(&qu->ctx,ctx,sizeof(qu->ctx)); |
123 | query_submit(ads,qu, typei,qumsg_vb,id,flags,now); |
124 | |
3955725c |
125 | return adns_s_ok; |
660d7d3b |
126 | } |
127 | |
128 | static void query_simple(adns_state ads, adns_query qu, |
129 | const char *owner, int ol, |
130 | const typeinfo *typei, adns_queryflags flags, |
131 | struct timeval now) { |
149dd923 |
132 | vbuf vb_new; |
660d7d3b |
133 | int id; |
134 | adns_status stat; |
e576be50 |
135 | |
2c6eb096 |
136 | stat= adns__mkquery(ads,&qu->vb,&id, owner,ol, |
137 | typei,qu->answer->type, flags); |
149dd923 |
138 | if (stat) { |
139 | if (stat == adns_s_querydomaintoolong && (flags & adns_qf_search)) { |
140 | adns__search_next(ads,qu,now); |
141 | return; |
142 | } else { |
143 | adns__query_fail(qu,stat); |
144 | return; |
145 | } |
146 | } |
147 | |
148 | vb_new= qu->vb; |
149 | adns__vbuf_init(&qu->vb); |
150 | query_submit(ads,qu, typei,&vb_new,id, flags,now); |
660d7d3b |
151 | } |
152 | |
153 | void adns__search_next(adns_state ads, adns_query qu, struct timeval now) { |
154 | const char *nextentry; |
155 | adns_status stat; |
156 | |
157 | if (qu->search_doneabs<0) { |
158 | nextentry= 0; |
159 | qu->search_doneabs= 1; |
160 | } else { |
161 | if (qu->search_pos >= ads->nsearchlist) { |
162 | if (qu->search_doneabs) { |
ac015392 |
163 | qu->search_vb.used= qu->search_origlen; |
660d7d3b |
164 | stat= adns_s_nxdomain; goto x_fail; |
660d7d3b |
165 | } else { |
166 | nextentry= 0; |
167 | qu->search_doneabs= 1; |
168 | } |
169 | } else { |
170 | nextentry= ads->searchlist[qu->search_pos++]; |
171 | } |
172 | } |
173 | |
e2632eb9 |
174 | qu->search_vb.used= qu->search_origlen; |
660d7d3b |
175 | if (nextentry) { |
176 | if (!adns__vbuf_append(&qu->search_vb,".",1) || |
ac015392 |
177 | !adns__vbuf_appendstr(&qu->search_vb,nextentry)) |
178 | goto x_nomemory; |
660d7d3b |
179 | } |
180 | |
181 | free(qu->query_dgram); |
182 | qu->query_dgram= 0; qu->query_dglen= 0; |
183 | |
609133ee |
184 | query_simple(ads,qu, qu->search_vb.buf, qu->search_vb.used, |
185 | qu->typei, qu->flags, now); |
660d7d3b |
186 | return; |
ac015392 |
187 | |
188 | x_nomemory: |
189 | stat= adns_s_nomemory; |
660d7d3b |
190 | x_fail: |
191 | adns__query_fail(qu,stat); |
4bec51a4 |
192 | } |
193 | |
22181a31 |
194 | static int save_owner(adns_query qu, const char *owner, int ol) { |
195 | /* Returns 1 if OK, otherwise there was no memory. */ |
196 | adns_answer *ans; |
197 | |
ac015392 |
198 | if (!(qu->flags & adns_qf_owner)) return 1; |
199 | |
22181a31 |
200 | ans= qu->answer; |
201 | assert(!ans->owner); |
202 | |
8b3d55e3 |
203 | ans->owner= adns__alloc_preserved(qu,ol+1); if (!ans->owner) return 0; |
22181a31 |
204 | |
205 | memcpy(ans->owner,owner,ol); |
206 | ans->owner[ol]= 0; |
207 | return 1; |
208 | } |
209 | |
e576be50 |
210 | int adns_submit(adns_state ads, |
211 | const char *owner, |
212 | adns_rrtype type, |
e563872a |
213 | adns_queryflags flags, |
e576be50 |
214 | void *context, |
215 | adns_query *query_r) { |
660d7d3b |
216 | int r, ol, ndots; |
3955725c |
217 | adns_status stat; |
218 | const typeinfo *typei; |
219 | struct timeval now; |
660d7d3b |
220 | adns_query qu; |
221 | const char *p; |
e576be50 |
222 | |
28de6442 |
223 | adns__consistency(ads,0,cc_entex); |
3e2e5fab |
224 | |
3955725c |
225 | typei= adns__findtype(type); |
636b69b1 |
226 | if (!typei) return ENOSYS; |
e576be50 |
227 | |
660d7d3b |
228 | r= gettimeofday(&now,0); if (r) goto x_errno; |
2c6eb096 |
229 | qu= query_alloc(ads,typei,type,flags,now); if (!qu) goto x_errno; |
660d7d3b |
230 | |
231 | qu->ctx.ext= context; |
232 | qu->ctx.callback= 0; |
233 | memset(&qu->ctx.info,0,sizeof(qu->ctx.info)); |
e576be50 |
234 | |
e2632eb9 |
235 | *query_r= qu; |
236 | |
e576be50 |
237 | ol= strlen(owner); |
660d7d3b |
238 | if (!ol) { stat= adns_s_querydomaininvalid; goto x_adnsfail; } |
239 | if (ol>DNS_MAXDOMAIN+1) { stat= adns_s_querydomaintoolong; goto x_adnsfail; } |
e576be50 |
240 | |
e9e53c73 |
241 | if (ol>=1 && owner[ol-1]=='.' && (ol<2 || owner[ol-2]!='\\')) { |
242 | flags &= ~adns_qf_search; |
3d1ae6ea |
243 | qu->flags= flags; |
e9e53c73 |
244 | ol--; |
245 | } |
e576be50 |
246 | |
660d7d3b |
247 | if (flags & adns_qf_search) { |
248 | r= adns__vbuf_append(&qu->search_vb,owner,ol); |
249 | if (!r) { stat= adns_s_nomemory; goto x_adnsfail; } |
250 | |
251 | for (ndots=0, p=owner; (p= strchr(p,'.')); p++, ndots++); |
252 | qu->search_doneabs= (ndots >= ads->searchndots) ? -1 : 0; |
660d7d3b |
253 | qu->search_origlen= ol; |
660d7d3b |
254 | adns__search_next(ads,qu,now); |
e2632eb9 |
255 | } else { |
22181a31 |
256 | if (flags & adns_qf_owner) { |
257 | if (!save_owner(qu,owner,ol)) { stat= adns_s_nomemory; goto x_adnsfail; } |
258 | } |
e2632eb9 |
259 | query_simple(ads,qu, owner,ol, typei,flags, now); |
660d7d3b |
260 | } |
70ad7a2a |
261 | adns__autosys(ads,now); |
28de6442 |
262 | adns__consistency(ads,qu,cc_entex); |
660d7d3b |
263 | return 0; |
264 | |
265 | x_adnsfail: |
266 | adns__query_fail(qu,stat); |
28de6442 |
267 | adns__consistency(ads,qu,cc_entex); |
660d7d3b |
268 | return 0; |
269 | |
270 | x_errno: |
271 | r= errno; |
272 | assert(r); |
28de6442 |
273 | adns__consistency(ads,0,cc_entex); |
660d7d3b |
274 | return r; |
ddfda861 |
275 | } |
276 | |
2b1c6979 |
277 | int adns_submit_reverse_any(adns_state ads, |
278 | const struct sockaddr *addr, |
279 | const char *zone, |
280 | adns_rrtype type, |
281 | adns_queryflags flags, |
282 | void *context, |
283 | adns_query *query_r) { |
d7449548 |
284 | const unsigned char *iaddr; |
2b1c6979 |
285 | char *buf, *buf_free; |
286 | char shortbuf[100]; |
287 | int r, lreq; |
d7449548 |
288 | |
d7449548 |
289 | flags &= ~adns_qf_search; |
290 | |
291 | if (addr->sa_family != AF_INET) return ENOSYS; |
609133ee |
292 | iaddr= (const unsigned char*) |
293 | &(((const struct sockaddr_in*)addr) -> sin_addr); |
d7449548 |
294 | |
2b1c6979 |
295 | lreq= strlen(zone) + 4*4 + 1; |
296 | if (lreq > sizeof(shortbuf)) { |
297 | buf= malloc(strlen(zone) + 4*4 + 1); |
298 | if (!buf) return errno; |
299 | buf_free= buf; |
300 | } else { |
301 | buf= shortbuf; |
302 | buf_free= 0; |
303 | } |
304 | sprintf(buf, "%d.%d.%d.%d.%s", iaddr[3], iaddr[2], iaddr[1], iaddr[0], zone); |
d7449548 |
305 | |
2b1c6979 |
306 | r= adns_submit(ads,buf,type,flags,context,query_r); |
307 | free(buf_free); |
308 | return r; |
309 | } |
310 | |
311 | int adns_submit_reverse(adns_state ads, |
312 | const struct sockaddr *addr, |
313 | adns_rrtype type, |
314 | adns_queryflags flags, |
315 | void *context, |
316 | adns_query *query_r) { |
317 | if (type != adns_r_ptr && type != adns_r_ptr_raw) return EINVAL; |
609133ee |
318 | return adns_submit_reverse_any(ads,addr,"in-addr.arpa", |
319 | type,flags,context,query_r); |
d7449548 |
320 | } |
321 | |
e576be50 |
322 | int adns_synchronous(adns_state ads, |
323 | const char *owner, |
324 | adns_rrtype type, |
e563872a |
325 | adns_queryflags flags, |
e576be50 |
326 | adns_answer **answer_r) { |
327 | adns_query qu; |
328 | int r; |
329 | |
330 | r= adns_submit(ads,owner,type,flags,0,&qu); |
331 | if (r) return r; |
4bec51a4 |
332 | |
88372443 |
333 | r= adns_wait(ads,&qu,answer_r,0); |
3955725c |
334 | if (r) adns_cancel(qu); |
ddfda861 |
335 | |
88372443 |
336 | return r; |
e576be50 |
337 | } |
338 | |
f759e52e |
339 | static void *alloc_common(adns_query qu, size_t sz) { |
e576be50 |
340 | allocnode *an; |
341 | |
a49a6d7b |
342 | if (!sz) return qu; /* Any old pointer will do */ |
e576be50 |
343 | assert(!qu->final_allocspace); |
e576be50 |
344 | an= malloc(MEM_ROUND(MEM_ROUND(sizeof(*an)) + sz)); |
e062dcae |
345 | if (!an) return 0; |
551ff40f |
346 | LIST_LINK_TAIL(qu->allocations,an); |
e576be50 |
347 | return (byte*)an + MEM_ROUND(sizeof(*an)); |
348 | } |
4bec51a4 |
349 | |
f759e52e |
350 | void *adns__alloc_interim(adns_query qu, size_t sz) { |
8b3d55e3 |
351 | void *rv; |
352 | |
f759e52e |
353 | sz= MEM_ROUND(sz); |
8b3d55e3 |
354 | rv= alloc_common(qu,sz); |
355 | if (!rv) return 0; |
f759e52e |
356 | qu->interim_allocd += sz; |
8b3d55e3 |
357 | return rv; |
358 | } |
359 | |
360 | void *adns__alloc_preserved(adns_query qu, size_t sz) { |
361 | void *rv; |
362 | |
363 | sz= MEM_ROUND(sz); |
364 | rv= adns__alloc_interim(qu,sz); |
365 | if (!rv) return 0; |
366 | qu->preserved_allocd += sz; |
367 | return rv; |
f759e52e |
368 | } |
369 | |
370 | void *adns__alloc_mine(adns_query qu, size_t sz) { |
371 | return alloc_common(qu,MEM_ROUND(sz)); |
372 | } |
373 | |
609133ee |
374 | void adns__transfer_interim(adns_query from, adns_query to, |
375 | void *block, size_t sz) { |
551ff40f |
376 | allocnode *an; |
377 | |
378 | if (!block) return; |
379 | an= (void*)((byte*)block - MEM_ROUND(sizeof(*an))); |
380 | |
381 | assert(!to->final_allocspace); |
382 | assert(!from->final_allocspace); |
383 | |
384 | LIST_UNLINK(from->allocations,an); |
385 | LIST_LINK_TAIL(to->allocations,an); |
386 | |
3dbef075 |
387 | sz= MEM_ROUND(sz); |
551ff40f |
388 | from->interim_allocd -= sz; |
389 | to->interim_allocd += sz; |
73dba56e |
390 | |
391 | if (to->expires > from->expires) to->expires= from->expires; |
551ff40f |
392 | } |
393 | |
e576be50 |
394 | void *adns__alloc_final(adns_query qu, size_t sz) { |
395 | /* When we're in the _final stage, we _subtract_ from interim_alloc'd |
396 | * each allocation, and use final_allocspace to point to the next free |
397 | * bit. |
398 | */ |
399 | void *rp; |
400 | |
401 | sz= MEM_ROUND(sz); |
402 | rp= qu->final_allocspace; |
403 | assert(rp); |
404 | qu->interim_allocd -= sz; |
405 | assert(qu->interim_allocd>=0); |
406 | qu->final_allocspace= (byte*)rp + sz; |
407 | return rp; |
408 | } |
409 | |
9ec44266 |
410 | static void cancel_children(adns_query qu) { |
411 | adns_query cqu, ncqu; |
412 | |
413 | for (cqu= qu->children.head; cqu; cqu= ncqu) { |
414 | ncqu= cqu->siblings.next; |
415 | adns_cancel(cqu); |
416 | } |
9ec44266 |
417 | } |
418 | |
8b3d55e3 |
419 | void adns__reset_preserved(adns_query qu) { |
9557e604 |
420 | assert(!qu->final_allocspace); |
9ec44266 |
421 | cancel_children(qu); |
e576be50 |
422 | qu->answer->nrrs= 0; |
71a6ff46 |
423 | qu->answer->rrs.untyped= 0; |
8b3d55e3 |
424 | qu->interim_allocd= qu->preserved_allocd; |
4353a5c4 |
425 | } |
426 | |
88372443 |
427 | static void free_query_allocs(adns_query qu) { |
428 | allocnode *an, *ann; |
88372443 |
429 | |
9ec44266 |
430 | cancel_children(qu); |
551ff40f |
431 | for (an= qu->allocations.head; an; an= ann) { ann= an->next; free(an); } |
bfc2c80e |
432 | LIST_INIT(qu->allocations); |
88372443 |
433 | adns__vbuf_free(&qu->vb); |
914a5ff5 |
434 | adns__vbuf_free(&qu->search_vb); |
eed63b97 |
435 | free(qu->query_dgram); |
d1cac7c0 |
436 | qu->query_dgram= 0; |
88372443 |
437 | } |
438 | |
1dfe95d8 |
439 | void adns_cancel(adns_query qu) { |
3e2e5fab |
440 | adns_state ads; |
441 | |
442 | ads= qu->ads; |
28de6442 |
443 | adns__consistency(ads,qu,cc_entex); |
33ae0ddd |
444 | if (qu->parent) LIST_UNLINK_PART(qu->parent->children,qu,siblings.); |
88372443 |
445 | switch (qu->state) { |
f7f83b4a |
446 | case query_tosend: |
447 | LIST_UNLINK(ads->udpw,qu); |
88372443 |
448 | break; |
f7f83b4a |
449 | case query_tcpw: |
450 | LIST_UNLINK(ads->tcpw,qu); |
451 | break; |
452 | case query_childw: |
3e2e5fab |
453 | LIST_UNLINK(ads->childw,qu); |
88372443 |
454 | break; |
455 | case query_done: |
3e2e5fab |
456 | LIST_UNLINK(ads->output,qu); |
88372443 |
457 | break; |
458 | default: |
459 | abort(); |
460 | } |
461 | free_query_allocs(qu); |
462 | free(qu->answer); |
463 | free(qu); |
28de6442 |
464 | adns__consistency(ads,0,cc_entex); |
88372443 |
465 | } |
551ff40f |
466 | |
609133ee |
467 | void adns__update_expires(adns_query qu, unsigned long ttl, |
468 | struct timeval now) { |
73dba56e |
469 | time_t max; |
470 | |
471 | assert(ttl <= MAXTTLBELIEVE); |
472 | max= now.tv_sec + ttl; |
473 | if (qu->expires < max) return; |
474 | qu->expires= max; |
475 | } |
476 | |
551ff40f |
477 | static void makefinal_query(adns_query qu) { |
98a3f706 |
478 | adns_answer *ans; |
88372443 |
479 | int rrn; |
8e5b0abb |
480 | |
88372443 |
481 | ans= qu->answer; |
551ff40f |
482 | |
88372443 |
483 | if (qu->interim_allocd) { |
609133ee |
484 | ans= realloc(qu->answer, |
485 | MEM_ROUND(MEM_ROUND(sizeof(*ans)) + qu->interim_allocd)); |
551ff40f |
486 | if (!ans) goto x_nomem; |
e062dcae |
487 | qu->answer= ans; |
488 | } |
8e5b0abb |
489 | |
88372443 |
490 | qu->final_allocspace= (byte*)ans + MEM_ROUND(sizeof(*ans)); |
8e5b0abb |
491 | adns__makefinal_str(qu,&ans->cname); |
22181a31 |
492 | adns__makefinal_str(qu,&ans->owner); |
88372443 |
493 | |
8e5b0abb |
494 | if (ans->nrrs) { |
88372443 |
495 | adns__makefinal_block(qu, &ans->rrs.untyped, ans->nrrs*ans->rrsz); |
8e5b0abb |
496 | |
88372443 |
497 | for (rrn=0; rrn<ans->nrrs; rrn++) |
498 | qu->typei->makefinal(qu, ans->rrs.bytes + rrn*ans->rrsz); |
88372443 |
499 | } |
73dba56e |
500 | |
88372443 |
501 | free_query_allocs(qu); |
551ff40f |
502 | return; |
8e5b0abb |
503 | |
551ff40f |
504 | x_nomem: |
8b3d55e3 |
505 | qu->preserved_allocd= 0; |
551ff40f |
506 | qu->answer->cname= 0; |
8b3d55e3 |
507 | qu->answer->owner= 0; |
508 | adns__reset_preserved(qu); /* (but we just threw away the preserved stuff) */ |
509 | |
510 | qu->answer->status= adns_s_nomemory; |
551ff40f |
511 | free_query_allocs(qu); |
512 | } |
513 | |
514 | void adns__query_done(adns_query qu) { |
515 | adns_answer *ans; |
516 | adns_query parent; |
517 | |
4218fb9a |
518 | cancel_children(qu); |
519 | |
4353a5c4 |
520 | qu->id= -1; |
551ff40f |
521 | ans= qu->answer; |
522 | |
ac015392 |
523 | if (qu->flags & adns_qf_search && ans->status != adns_s_nomemory) { |
22181a31 |
524 | if (!save_owner(qu, qu->search_vb.buf, qu->search_vb.used)) { |
525 | adns__query_fail(qu,adns_s_nomemory); |
526 | return; |
527 | } |
528 | } |
529 | |
551ff40f |
530 | if (ans->nrrs && qu->typei->diff_needswap) { |
531 | if (!adns__vbuf_ensure(&qu->vb,qu->typei->rrsz)) { |
ea1e31e3 |
532 | adns__query_fail(qu,adns_s_nomemory); |
551ff40f |
533 | return; |
534 | } |
535 | adns__isort(ans->rrs.bytes, ans->nrrs, ans->rrsz, |
09957b1c |
536 | qu->vb.buf, |
609133ee |
537 | (int(*)(void*, const void*, const void*)) |
538 | qu->typei->diff_needswap, |
09957b1c |
539 | qu->ads); |
551ff40f |
540 | } |
d24e2a7e |
541 | if (ans->nrrs && qu->typei->postsort) { |
542 | qu->typei->postsort(qu->ads, ans->rrs.bytes, ans->nrrs, qu->typei); |
543 | } |
e553d072 |
544 | |
73dba56e |
545 | ans->expires= qu->expires; |
551ff40f |
546 | parent= qu->parent; |
547 | if (parent) { |
548 | LIST_UNLINK_PART(parent->children,qu,siblings.); |
4218fb9a |
549 | LIST_UNLINK(qu->ads->childw,parent); |
a6536d8b |
550 | qu->ctx.callback(parent,qu); |
551ff40f |
551 | free_query_allocs(qu); |
eed63b97 |
552 | free(qu->answer); |
551ff40f |
553 | free(qu); |
551ff40f |
554 | } else { |
555 | makefinal_query(qu); |
556 | LIST_LINK_TAIL(qu->ads->output,qu); |
33ae0ddd |
557 | qu->state= query_done; |
551ff40f |
558 | } |
656b2da9 |
559 | } |
560 | |
3955725c |
561 | void adns__query_fail(adns_query qu, adns_status stat) { |
8b3d55e3 |
562 | adns__reset_preserved(qu); |
8e5b0abb |
563 | qu->answer->status= stat; |
3955725c |
564 | adns__query_done(qu); |
656b2da9 |
565 | } |
e576be50 |
566 | |
567 | void adns__makefinal_str(adns_query qu, char **strp) { |
568 | int l; |
569 | char *before, *after; |
570 | |
571 | before= *strp; |
9557e604 |
572 | if (!before) return; |
e576be50 |
573 | l= strlen(before)+1; |
574 | after= adns__alloc_final(qu,l); |
575 | memcpy(after,before,l); |
576 | *strp= after; |
577 | } |
578 | |
3955725c |
579 | void adns__makefinal_block(adns_query qu, void **blpp, size_t sz) { |
9557e604 |
580 | void *before, *after; |
e576be50 |
581 | |
9557e604 |
582 | before= *blpp; |
583 | if (!before) return; |
e576be50 |
584 | after= adns__alloc_final(qu,sz); |
9557e604 |
585 | memcpy(after,before,sz); |
e576be50 |
586 | *blpp= after; |
587 | } |