Commit | Line | Data |
---|---|---|
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, |
be4d66dc | 115 | qcontext *ctx) { |
660d7d3b | 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; | |
0ea82d76 MW |
233 | memset(&qu->ctx.pinfo,0,sizeof(qu->ctx.pinfo)); |
234 | memset(&qu->ctx.tinfo,0,sizeof(qu->ctx.tinfo)); | |
e576be50 | 235 | |
e2632eb9 | 236 | *query_r= qu; |
237 | ||
e576be50 | 238 | ol= strlen(owner); |
660d7d3b | 239 | if (!ol) { stat= adns_s_querydomaininvalid; goto x_adnsfail; } |
240 | if (ol>DNS_MAXDOMAIN+1) { stat= adns_s_querydomaintoolong; goto x_adnsfail; } | |
e576be50 | 241 | |
e9e53c73 | 242 | if (ol>=1 && owner[ol-1]=='.' && (ol<2 || owner[ol-2]!='\\')) { |
243 | flags &= ~adns_qf_search; | |
3d1ae6ea | 244 | qu->flags= flags; |
e9e53c73 | 245 | ol--; |
246 | } | |
e576be50 | 247 | |
660d7d3b | 248 | if (flags & adns_qf_search) { |
249 | r= adns__vbuf_append(&qu->search_vb,owner,ol); | |
250 | if (!r) { stat= adns_s_nomemory; goto x_adnsfail; } | |
251 | ||
252 | for (ndots=0, p=owner; (p= strchr(p,'.')); p++, ndots++); | |
253 | qu->search_doneabs= (ndots >= ads->searchndots) ? -1 : 0; | |
660d7d3b | 254 | qu->search_origlen= ol; |
660d7d3b | 255 | adns__search_next(ads,qu,now); |
e2632eb9 | 256 | } else { |
22181a31 | 257 | if (flags & adns_qf_owner) { |
258 | if (!save_owner(qu,owner,ol)) { stat= adns_s_nomemory; goto x_adnsfail; } | |
259 | } | |
e2632eb9 | 260 | query_simple(ads,qu, owner,ol, typei,flags, now); |
660d7d3b | 261 | } |
70ad7a2a | 262 | adns__autosys(ads,now); |
28de6442 | 263 | adns__consistency(ads,qu,cc_entex); |
660d7d3b | 264 | return 0; |
265 | ||
266 | x_adnsfail: | |
267 | adns__query_fail(qu,stat); | |
28de6442 | 268 | adns__consistency(ads,qu,cc_entex); |
660d7d3b | 269 | return 0; |
270 | ||
271 | x_errno: | |
272 | r= errno; | |
273 | assert(r); | |
28de6442 | 274 | adns__consistency(ads,0,cc_entex); |
660d7d3b | 275 | return r; |
ddfda861 | 276 | } |
277 | ||
2b1c6979 | 278 | int adns_submit_reverse_any(adns_state ads, |
279 | const struct sockaddr *addr, | |
280 | const char *zone, | |
281 | adns_rrtype type, | |
282 | adns_queryflags flags, | |
283 | void *context, | |
284 | adns_query *query_r) { | |
d7449548 | 285 | const unsigned char *iaddr; |
2b1c6979 | 286 | char *buf, *buf_free; |
287 | char shortbuf[100]; | |
288 | int r, lreq; | |
d7449548 | 289 | |
d7449548 | 290 | flags &= ~adns_qf_search; |
291 | ||
292 | if (addr->sa_family != AF_INET) return ENOSYS; | |
609133ee | 293 | iaddr= (const unsigned char*) |
294 | &(((const struct sockaddr_in*)addr) -> sin_addr); | |
d7449548 | 295 | |
2b1c6979 | 296 | lreq= strlen(zone) + 4*4 + 1; |
297 | if (lreq > sizeof(shortbuf)) { | |
298 | buf= malloc(strlen(zone) + 4*4 + 1); | |
299 | if (!buf) return errno; | |
300 | buf_free= buf; | |
301 | } else { | |
302 | buf= shortbuf; | |
303 | buf_free= 0; | |
304 | } | |
305 | sprintf(buf, "%d.%d.%d.%d.%s", iaddr[3], iaddr[2], iaddr[1], iaddr[0], zone); | |
d7449548 | 306 | |
2b1c6979 | 307 | r= adns_submit(ads,buf,type,flags,context,query_r); |
308 | free(buf_free); | |
309 | return r; | |
310 | } | |
311 | ||
312 | int adns_submit_reverse(adns_state ads, | |
313 | const struct sockaddr *addr, | |
314 | adns_rrtype type, | |
315 | adns_queryflags flags, | |
316 | void *context, | |
317 | adns_query *query_r) { | |
318 | if (type != adns_r_ptr && type != adns_r_ptr_raw) return EINVAL; | |
609133ee | 319 | return adns_submit_reverse_any(ads,addr,"in-addr.arpa", |
320 | type,flags,context,query_r); | |
d7449548 | 321 | } |
322 | ||
e576be50 | 323 | int adns_synchronous(adns_state ads, |
324 | const char *owner, | |
325 | adns_rrtype type, | |
e563872a | 326 | adns_queryflags flags, |
e576be50 | 327 | adns_answer **answer_r) { |
328 | adns_query qu; | |
329 | int r; | |
330 | ||
331 | r= adns_submit(ads,owner,type,flags,0,&qu); | |
332 | if (r) return r; | |
4bec51a4 | 333 | |
88372443 | 334 | r= adns_wait(ads,&qu,answer_r,0); |
3955725c | 335 | if (r) adns_cancel(qu); |
ddfda861 | 336 | |
88372443 | 337 | return r; |
e576be50 | 338 | } |
339 | ||
f759e52e | 340 | static void *alloc_common(adns_query qu, size_t sz) { |
e576be50 | 341 | allocnode *an; |
342 | ||
a49a6d7b | 343 | if (!sz) return qu; /* Any old pointer will do */ |
e576be50 | 344 | assert(!qu->final_allocspace); |
e576be50 | 345 | an= malloc(MEM_ROUND(MEM_ROUND(sizeof(*an)) + sz)); |
e062dcae | 346 | if (!an) return 0; |
551ff40f | 347 | LIST_LINK_TAIL(qu->allocations,an); |
e576be50 | 348 | return (byte*)an + MEM_ROUND(sizeof(*an)); |
349 | } | |
4bec51a4 | 350 | |
f759e52e | 351 | void *adns__alloc_interim(adns_query qu, size_t sz) { |
8b3d55e3 | 352 | void *rv; |
353 | ||
f759e52e | 354 | sz= MEM_ROUND(sz); |
8b3d55e3 | 355 | rv= alloc_common(qu,sz); |
356 | if (!rv) return 0; | |
f759e52e | 357 | qu->interim_allocd += sz; |
8b3d55e3 | 358 | return rv; |
359 | } | |
360 | ||
361 | void *adns__alloc_preserved(adns_query qu, size_t sz) { | |
362 | void *rv; | |
363 | ||
364 | sz= MEM_ROUND(sz); | |
365 | rv= adns__alloc_interim(qu,sz); | |
366 | if (!rv) return 0; | |
367 | qu->preserved_allocd += sz; | |
368 | return rv; | |
f759e52e | 369 | } |
370 | ||
371 | void *adns__alloc_mine(adns_query qu, size_t sz) { | |
372 | return alloc_common(qu,MEM_ROUND(sz)); | |
373 | } | |
374 | ||
609133ee | 375 | void adns__transfer_interim(adns_query from, adns_query to, |
376 | void *block, size_t sz) { | |
551ff40f | 377 | allocnode *an; |
378 | ||
379 | if (!block) return; | |
380 | an= (void*)((byte*)block - MEM_ROUND(sizeof(*an))); | |
381 | ||
382 | assert(!to->final_allocspace); | |
383 | assert(!from->final_allocspace); | |
384 | ||
385 | LIST_UNLINK(from->allocations,an); | |
386 | LIST_LINK_TAIL(to->allocations,an); | |
387 | ||
3dbef075 | 388 | sz= MEM_ROUND(sz); |
551ff40f | 389 | from->interim_allocd -= sz; |
390 | to->interim_allocd += sz; | |
73dba56e | 391 | |
392 | if (to->expires > from->expires) to->expires= from->expires; | |
551ff40f | 393 | } |
394 | ||
e576be50 | 395 | void *adns__alloc_final(adns_query qu, size_t sz) { |
396 | /* When we're in the _final stage, we _subtract_ from interim_alloc'd | |
397 | * each allocation, and use final_allocspace to point to the next free | |
398 | * bit. | |
399 | */ | |
400 | void *rp; | |
401 | ||
402 | sz= MEM_ROUND(sz); | |
403 | rp= qu->final_allocspace; | |
404 | assert(rp); | |
405 | qu->interim_allocd -= sz; | |
406 | assert(qu->interim_allocd>=0); | |
407 | qu->final_allocspace= (byte*)rp + sz; | |
408 | return rp; | |
409 | } | |
410 | ||
9ec44266 | 411 | static void cancel_children(adns_query qu) { |
412 | adns_query cqu, ncqu; | |
413 | ||
414 | for (cqu= qu->children.head; cqu; cqu= ncqu) { | |
415 | ncqu= cqu->siblings.next; | |
416 | adns_cancel(cqu); | |
417 | } | |
9ec44266 | 418 | } |
419 | ||
8b3d55e3 | 420 | void adns__reset_preserved(adns_query qu) { |
9557e604 | 421 | assert(!qu->final_allocspace); |
9ec44266 | 422 | cancel_children(qu); |
e576be50 | 423 | qu->answer->nrrs= 0; |
71a6ff46 | 424 | qu->answer->rrs.untyped= 0; |
8b3d55e3 | 425 | qu->interim_allocd= qu->preserved_allocd; |
4353a5c4 | 426 | } |
427 | ||
88372443 | 428 | static void free_query_allocs(adns_query qu) { |
429 | allocnode *an, *ann; | |
88372443 | 430 | |
9ec44266 | 431 | cancel_children(qu); |
551ff40f | 432 | for (an= qu->allocations.head; an; an= ann) { ann= an->next; free(an); } |
bfc2c80e | 433 | LIST_INIT(qu->allocations); |
88372443 | 434 | adns__vbuf_free(&qu->vb); |
914a5ff5 | 435 | adns__vbuf_free(&qu->search_vb); |
eed63b97 | 436 | free(qu->query_dgram); |
d1cac7c0 | 437 | qu->query_dgram= 0; |
88372443 | 438 | } |
439 | ||
1dfe95d8 | 440 | void adns_cancel(adns_query qu) { |
3e2e5fab | 441 | adns_state ads; |
442 | ||
443 | ads= qu->ads; | |
28de6442 | 444 | adns__consistency(ads,qu,cc_entex); |
33ae0ddd | 445 | if (qu->parent) LIST_UNLINK_PART(qu->parent->children,qu,siblings.); |
88372443 | 446 | switch (qu->state) { |
f7f83b4a | 447 | case query_tosend: |
448 | LIST_UNLINK(ads->udpw,qu); | |
88372443 | 449 | break; |
f7f83b4a | 450 | case query_tcpw: |
451 | LIST_UNLINK(ads->tcpw,qu); | |
452 | break; | |
453 | case query_childw: | |
3e2e5fab | 454 | LIST_UNLINK(ads->childw,qu); |
88372443 | 455 | break; |
456 | case query_done: | |
3e2e5fab | 457 | LIST_UNLINK(ads->output,qu); |
88372443 | 458 | break; |
459 | default: | |
460 | abort(); | |
461 | } | |
462 | free_query_allocs(qu); | |
463 | free(qu->answer); | |
464 | free(qu); | |
28de6442 | 465 | adns__consistency(ads,0,cc_entex); |
88372443 | 466 | } |
551ff40f | 467 | |
609133ee | 468 | void adns__update_expires(adns_query qu, unsigned long ttl, |
469 | struct timeval now) { | |
73dba56e | 470 | time_t max; |
471 | ||
472 | assert(ttl <= MAXTTLBELIEVE); | |
473 | max= now.tv_sec + ttl; | |
474 | if (qu->expires < max) return; | |
475 | qu->expires= max; | |
476 | } | |
477 | ||
551ff40f | 478 | static void makefinal_query(adns_query qu) { |
98a3f706 | 479 | adns_answer *ans; |
88372443 | 480 | int rrn; |
8e5b0abb | 481 | |
88372443 | 482 | ans= qu->answer; |
551ff40f | 483 | |
88372443 | 484 | if (qu->interim_allocd) { |
609133ee | 485 | ans= realloc(qu->answer, |
486 | MEM_ROUND(MEM_ROUND(sizeof(*ans)) + qu->interim_allocd)); | |
551ff40f | 487 | if (!ans) goto x_nomem; |
e062dcae | 488 | qu->answer= ans; |
489 | } | |
8e5b0abb | 490 | |
88372443 | 491 | qu->final_allocspace= (byte*)ans + MEM_ROUND(sizeof(*ans)); |
8e5b0abb | 492 | adns__makefinal_str(qu,&ans->cname); |
22181a31 | 493 | adns__makefinal_str(qu,&ans->owner); |
88372443 | 494 | |
8e5b0abb | 495 | if (ans->nrrs) { |
88372443 | 496 | adns__makefinal_block(qu, &ans->rrs.untyped, ans->nrrs*ans->rrsz); |
8e5b0abb | 497 | |
88372443 | 498 | for (rrn=0; rrn<ans->nrrs; rrn++) |
499 | qu->typei->makefinal(qu, ans->rrs.bytes + rrn*ans->rrsz); | |
88372443 | 500 | } |
73dba56e | 501 | |
88372443 | 502 | free_query_allocs(qu); |
551ff40f | 503 | return; |
8e5b0abb | 504 | |
551ff40f | 505 | x_nomem: |
8b3d55e3 | 506 | qu->preserved_allocd= 0; |
551ff40f | 507 | qu->answer->cname= 0; |
8b3d55e3 | 508 | qu->answer->owner= 0; |
509 | adns__reset_preserved(qu); /* (but we just threw away the preserved stuff) */ | |
510 | ||
511 | qu->answer->status= adns_s_nomemory; | |
551ff40f | 512 | free_query_allocs(qu); |
513 | } | |
514 | ||
515 | void adns__query_done(adns_query qu) { | |
516 | adns_answer *ans; | |
517 | adns_query parent; | |
518 | ||
4218fb9a | 519 | cancel_children(qu); |
520 | ||
4353a5c4 | 521 | qu->id= -1; |
551ff40f | 522 | ans= qu->answer; |
523 | ||
ac015392 | 524 | if (qu->flags & adns_qf_search && ans->status != adns_s_nomemory) { |
22181a31 | 525 | if (!save_owner(qu, qu->search_vb.buf, qu->search_vb.used)) { |
526 | adns__query_fail(qu,adns_s_nomemory); | |
527 | return; | |
528 | } | |
529 | } | |
530 | ||
551ff40f | 531 | if (ans->nrrs && qu->typei->diff_needswap) { |
532 | if (!adns__vbuf_ensure(&qu->vb,qu->typei->rrsz)) { | |
ea1e31e3 | 533 | adns__query_fail(qu,adns_s_nomemory); |
551ff40f | 534 | return; |
535 | } | |
536 | adns__isort(ans->rrs.bytes, ans->nrrs, ans->rrsz, | |
09957b1c | 537 | qu->vb.buf, |
609133ee | 538 | (int(*)(void*, const void*, const void*)) |
539 | qu->typei->diff_needswap, | |
09957b1c | 540 | qu->ads); |
551ff40f | 541 | } |
d24e2a7e | 542 | if (ans->nrrs && qu->typei->postsort) { |
543 | qu->typei->postsort(qu->ads, ans->rrs.bytes, ans->nrrs, qu->typei); | |
544 | } | |
e553d072 | 545 | |
73dba56e | 546 | ans->expires= qu->expires; |
551ff40f | 547 | parent= qu->parent; |
548 | if (parent) { | |
549 | LIST_UNLINK_PART(parent->children,qu,siblings.); | |
4218fb9a | 550 | LIST_UNLINK(qu->ads->childw,parent); |
a6536d8b | 551 | qu->ctx.callback(parent,qu); |
551ff40f | 552 | free_query_allocs(qu); |
eed63b97 | 553 | free(qu->answer); |
551ff40f | 554 | free(qu); |
551ff40f | 555 | } else { |
556 | makefinal_query(qu); | |
557 | LIST_LINK_TAIL(qu->ads->output,qu); | |
33ae0ddd | 558 | qu->state= query_done; |
551ff40f | 559 | } |
656b2da9 | 560 | } |
561 | ||
3955725c | 562 | void adns__query_fail(adns_query qu, adns_status stat) { |
8b3d55e3 | 563 | adns__reset_preserved(qu); |
8e5b0abb | 564 | qu->answer->status= stat; |
3955725c | 565 | adns__query_done(qu); |
656b2da9 | 566 | } |
e576be50 | 567 | |
568 | void adns__makefinal_str(adns_query qu, char **strp) { | |
569 | int l; | |
570 | char *before, *after; | |
571 | ||
572 | before= *strp; | |
9557e604 | 573 | if (!before) return; |
e576be50 | 574 | l= strlen(before)+1; |
575 | after= adns__alloc_final(qu,l); | |
576 | memcpy(after,before,l); | |
577 | *strp= after; | |
578 | } | |
579 | ||
3955725c | 580 | void adns__makefinal_block(adns_query qu, void **blpp, size_t sz) { |
9557e604 | 581 | void *before, *after; |
e576be50 | 582 | |
9557e604 | 583 | before= *blpp; |
584 | if (!before) return; | |
e576be50 | 585 | after= adns__alloc_final(qu,sz); |
9557e604 | 586 | memcpy(after,before,sz); |
e576be50 | 587 | *blpp= after; |
588 | } |