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); | |
98db6da3 | 107 | |
24d52b13 | 108 | adns__query_send(qu,now); |
7e6a84a1 | 109 | } |
110 | ||
111 | adns_status adns__internal_submit(adns_state ads, adns_query *query_r, | |
9c344a42 | 112 | const typeinfo *typei, vbuf *qumsg_vb, |
113 | int id, | |
7e6a84a1 | 114 | adns_queryflags flags, struct timeval now, |
115 | const qcontext *ctx) { | |
116 | adns_query qu; | |
117 | ||
7d0aaee4 | 118 | qu= query_alloc(ads,typei,typei->typekey,flags,now); |
7e6a84a1 | 119 | if (!qu) { adns__vbuf_free(qumsg_vb); return adns_s_nomemory; } |
120 | *query_r= qu; | |
98db6da3 | 121 | |
7e6a84a1 | 122 | memcpy(&qu->ctx,ctx,sizeof(qu->ctx)); |
123 | query_submit(ads,qu, typei,qumsg_vb,id,flags,now); | |
124 | ||
11c8bf9b | 125 | return adns_s_ok; |
7e6a84a1 | 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) { | |
a880d9ba | 132 | vbuf vb_new; |
7e6a84a1 | 133 | int id; |
134 | adns_status stat; | |
98db6da3 | 135 | |
7d0aaee4 | 136 | stat= adns__mkquery(ads,&qu->vb,&id, owner,ol, |
137 | typei,qu->answer->type, flags); | |
a880d9ba | 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); | |
7e6a84a1 | 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) { | |
85021e18 | 163 | qu->search_vb.used= qu->search_origlen; |
7e6a84a1 | 164 | stat= adns_s_nxdomain; goto x_fail; |
7e6a84a1 | 165 | } else { |
166 | nextentry= 0; | |
167 | qu->search_doneabs= 1; | |
168 | } | |
169 | } else { | |
170 | nextentry= ads->searchlist[qu->search_pos++]; | |
171 | } | |
172 | } | |
173 | ||
a5da6822 | 174 | qu->search_vb.used= qu->search_origlen; |
7e6a84a1 | 175 | if (nextentry) { |
176 | if (!adns__vbuf_append(&qu->search_vb,".",1) || | |
85021e18 | 177 | !adns__vbuf_appendstr(&qu->search_vb,nextentry)) |
178 | goto x_nomemory; | |
7e6a84a1 | 179 | } |
180 | ||
181 | free(qu->query_dgram); | |
182 | qu->query_dgram= 0; qu->query_dglen= 0; | |
183 | ||
9c344a42 | 184 | query_simple(ads,qu, qu->search_vb.buf, qu->search_vb.used, |
185 | qu->typei, qu->flags, now); | |
7e6a84a1 | 186 | return; |
85021e18 | 187 | |
188 | x_nomemory: | |
189 | stat= adns_s_nomemory; | |
7e6a84a1 | 190 | x_fail: |
191 | adns__query_fail(qu,stat); | |
48cb0b4b | 192 | } |
193 | ||
b2988d3e | 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 | ||
85021e18 | 198 | if (!(qu->flags & adns_qf_owner)) return 1; |
199 | ||
b2988d3e | 200 | ans= qu->answer; |
201 | assert(!ans->owner); | |
202 | ||
1be24aef | 203 | ans->owner= adns__alloc_preserved(qu,ol+1); if (!ans->owner) return 0; |
b2988d3e | 204 | |
205 | memcpy(ans->owner,owner,ol); | |
206 | ans->owner[ol]= 0; | |
207 | return 1; | |
208 | } | |
209 | ||
98db6da3 | 210 | int adns_submit(adns_state ads, |
211 | const char *owner, | |
212 | adns_rrtype type, | |
edb95764 | 213 | adns_queryflags flags, |
98db6da3 | 214 | void *context, |
215 | adns_query *query_r) { | |
7e6a84a1 | 216 | int r, ol, ndots; |
11c8bf9b | 217 | adns_status stat; |
218 | const typeinfo *typei; | |
219 | struct timeval now; | |
7e6a84a1 | 220 | adns_query qu; |
221 | const char *p; | |
98db6da3 | 222 | |
2ac463bf | 223 | adns__consistency(ads,0,cc_entex); |
1389dc72 | 224 | |
11c8bf9b | 225 | typei= adns__findtype(type); |
125de2a9 | 226 | if (!typei) return ENOSYS; |
98db6da3 | 227 | |
7e6a84a1 | 228 | r= gettimeofday(&now,0); if (r) goto x_errno; |
7d0aaee4 | 229 | qu= query_alloc(ads,typei,type,flags,now); if (!qu) goto x_errno; |
7e6a84a1 | 230 | |
231 | qu->ctx.ext= context; | |
232 | qu->ctx.callback= 0; | |
233 | memset(&qu->ctx.info,0,sizeof(qu->ctx.info)); | |
98db6da3 | 234 | |
a5da6822 | 235 | *query_r= qu; |
236 | ||
98db6da3 | 237 | ol= strlen(owner); |
7e6a84a1 | 238 | if (!ol) { stat= adns_s_querydomaininvalid; goto x_adnsfail; } |
239 | if (ol>DNS_MAXDOMAIN+1) { stat= adns_s_querydomaintoolong; goto x_adnsfail; } | |
98db6da3 | 240 | |
7683abe2 | 241 | if (ol>=1 && owner[ol-1]=='.' && (ol<2 || owner[ol-2]!='\\')) { |
242 | flags &= ~adns_qf_search; | |
30c317a4 | 243 | qu->flags= flags; |
7683abe2 | 244 | ol--; |
245 | } | |
98db6da3 | 246 | |
7e6a84a1 | 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; | |
7e6a84a1 | 253 | qu->search_origlen= ol; |
7e6a84a1 | 254 | adns__search_next(ads,qu,now); |
a5da6822 | 255 | } else { |
b2988d3e | 256 | if (flags & adns_qf_owner) { |
257 | if (!save_owner(qu,owner,ol)) { stat= adns_s_nomemory; goto x_adnsfail; } | |
258 | } | |
a5da6822 | 259 | query_simple(ads,qu, owner,ol, typei,flags, now); |
7e6a84a1 | 260 | } |
ab898cf4 | 261 | adns__autosys(ads,now); |
2ac463bf | 262 | adns__consistency(ads,qu,cc_entex); |
7e6a84a1 | 263 | return 0; |
264 | ||
265 | x_adnsfail: | |
266 | adns__query_fail(qu,stat); | |
2ac463bf | 267 | adns__consistency(ads,qu,cc_entex); |
7e6a84a1 | 268 | return 0; |
269 | ||
270 | x_errno: | |
271 | r= errno; | |
272 | assert(r); | |
2ac463bf | 273 | adns__consistency(ads,0,cc_entex); |
7e6a84a1 | 274 | return r; |
96e79df5 | 275 | } |
276 | ||
8a53cf7f MW |
277 | static const char *default_zone = "<magic>"; |
278 | ||
d2f6d877 | 279 | int adns_submit_reverse_any(adns_state ads, |
280 | const struct sockaddr *addr, | |
281 | const char *zone, | |
282 | adns_rrtype type, | |
283 | adns_queryflags flags, | |
284 | void *context, | |
285 | adns_query *query_r) { | |
8a53cf7f | 286 | char *buf, *buf_free, *p; |
d2f6d877 | 287 | char shortbuf[100]; |
8a53cf7f | 288 | const afinfo *ai; |
d2f6d877 | 289 | int r, lreq; |
5e6342f0 | 290 | |
5e6342f0 | 291 | flags &= ~adns_qf_search; |
292 | ||
8a53cf7f MW |
293 | switch (addr->sa_family) { |
294 | case AF_INET: | |
295 | ai = &adns__inet_afinfo; | |
296 | if (zone == default_zone) zone = "in-addr.arpa"; | |
297 | break; | |
298 | case AF_INET6: | |
299 | ai = &adns__inet6_afinfo; | |
300 | if (zone == default_zone) zone = "ip6.arpa"; | |
301 | break; | |
302 | default: | |
303 | return ENOSYS; | |
304 | } | |
5e6342f0 | 305 | |
8a53cf7f | 306 | lreq= strlen(zone) + ai->nrevcomp*(ai->revcompwd + 1) + 1; |
d2f6d877 | 307 | if (lreq > sizeof(shortbuf)) { |
8a53cf7f | 308 | buf= malloc(lreq); |
d2f6d877 | 309 | if (!buf) return errno; |
310 | buf_free= buf; | |
311 | } else { | |
312 | buf= shortbuf; | |
313 | buf_free= 0; | |
314 | } | |
8a53cf7f MW |
315 | |
316 | p = ai->rev_mkname(addr, buf); | |
317 | *p++ = '.'; | |
318 | strcpy(p, zone); | |
5e6342f0 | 319 | |
d2f6d877 | 320 | r= adns_submit(ads,buf,type,flags,context,query_r); |
321 | free(buf_free); | |
322 | return r; | |
323 | } | |
324 | ||
325 | int adns_submit_reverse(adns_state ads, | |
326 | const struct sockaddr *addr, | |
327 | adns_rrtype type, | |
328 | adns_queryflags flags, | |
329 | void *context, | |
330 | adns_query *query_r) { | |
331 | if (type != adns_r_ptr && type != adns_r_ptr_raw) return EINVAL; | |
8a53cf7f | 332 | return adns_submit_reverse_any(ads,addr,default_zone, |
9c344a42 | 333 | type,flags,context,query_r); |
5e6342f0 | 334 | } |
335 | ||
98db6da3 | 336 | int adns_synchronous(adns_state ads, |
337 | const char *owner, | |
338 | adns_rrtype type, | |
edb95764 | 339 | adns_queryflags flags, |
98db6da3 | 340 | adns_answer **answer_r) { |
341 | adns_query qu; | |
342 | int r; | |
343 | ||
344 | r= adns_submit(ads,owner,type,flags,0,&qu); | |
345 | if (r) return r; | |
48cb0b4b | 346 | |
f318f883 | 347 | r= adns_wait(ads,&qu,answer_r,0); |
11c8bf9b | 348 | if (r) adns_cancel(qu); |
96e79df5 | 349 | |
f318f883 | 350 | return r; |
98db6da3 | 351 | } |
352 | ||
c9afe7bb | 353 | static void *alloc_common(adns_query qu, size_t sz) { |
98db6da3 | 354 | allocnode *an; |
355 | ||
f47cdeec | 356 | if (!sz) return qu; /* Any old pointer will do */ |
98db6da3 | 357 | assert(!qu->final_allocspace); |
98db6da3 | 358 | an= malloc(MEM_ROUND(MEM_ROUND(sizeof(*an)) + sz)); |
f2ad23ee | 359 | if (!an) return 0; |
bc01473e | 360 | LIST_LINK_TAIL(qu->allocations,an); |
98db6da3 | 361 | return (byte*)an + MEM_ROUND(sizeof(*an)); |
362 | } | |
48cb0b4b | 363 | |
c9afe7bb | 364 | void *adns__alloc_interim(adns_query qu, size_t sz) { |
1be24aef | 365 | void *rv; |
366 | ||
c9afe7bb | 367 | sz= MEM_ROUND(sz); |
1be24aef | 368 | rv= alloc_common(qu,sz); |
369 | if (!rv) return 0; | |
c9afe7bb | 370 | qu->interim_allocd += sz; |
1be24aef | 371 | return rv; |
372 | } | |
373 | ||
374 | void *adns__alloc_preserved(adns_query qu, size_t sz) { | |
375 | void *rv; | |
376 | ||
377 | sz= MEM_ROUND(sz); | |
378 | rv= adns__alloc_interim(qu,sz); | |
379 | if (!rv) return 0; | |
380 | qu->preserved_allocd += sz; | |
381 | return rv; | |
c9afe7bb | 382 | } |
383 | ||
384 | void *adns__alloc_mine(adns_query qu, size_t sz) { | |
385 | return alloc_common(qu,MEM_ROUND(sz)); | |
386 | } | |
387 | ||
9c344a42 | 388 | void adns__transfer_interim(adns_query from, adns_query to, |
389 | void *block, size_t sz) { | |
bc01473e | 390 | allocnode *an; |
391 | ||
392 | if (!block) return; | |
393 | an= (void*)((byte*)block - MEM_ROUND(sizeof(*an))); | |
394 | ||
395 | assert(!to->final_allocspace); | |
396 | assert(!from->final_allocspace); | |
397 | ||
398 | LIST_UNLINK(from->allocations,an); | |
399 | LIST_LINK_TAIL(to->allocations,an); | |
400 | ||
647d5ec1 | 401 | sz= MEM_ROUND(sz); |
bc01473e | 402 | from->interim_allocd -= sz; |
403 | to->interim_allocd += sz; | |
2c7b101b | 404 | |
405 | if (to->expires > from->expires) to->expires= from->expires; | |
bc01473e | 406 | } |
407 | ||
98db6da3 | 408 | void *adns__alloc_final(adns_query qu, size_t sz) { |
409 | /* When we're in the _final stage, we _subtract_ from interim_alloc'd | |
410 | * each allocation, and use final_allocspace to point to the next free | |
411 | * bit. | |
412 | */ | |
413 | void *rp; | |
414 | ||
415 | sz= MEM_ROUND(sz); | |
416 | rp= qu->final_allocspace; | |
417 | assert(rp); | |
418 | qu->interim_allocd -= sz; | |
419 | assert(qu->interim_allocd>=0); | |
420 | qu->final_allocspace= (byte*)rp + sz; | |
421 | return rp; | |
422 | } | |
423 | ||
61093792 | 424 | static void cancel_children(adns_query qu) { |
425 | adns_query cqu, ncqu; | |
426 | ||
427 | for (cqu= qu->children.head; cqu; cqu= ncqu) { | |
428 | ncqu= cqu->siblings.next; | |
429 | adns_cancel(cqu); | |
430 | } | |
61093792 | 431 | } |
432 | ||
1be24aef | 433 | void adns__reset_preserved(adns_query qu) { |
9a2b67d4 | 434 | assert(!qu->final_allocspace); |
61093792 | 435 | cancel_children(qu); |
98db6da3 | 436 | qu->answer->nrrs= 0; |
763d28b9 | 437 | qu->answer->rrs.untyped= 0; |
1be24aef | 438 | qu->interim_allocd= qu->preserved_allocd; |
d05cc330 | 439 | } |
440 | ||
f318f883 | 441 | static void free_query_allocs(adns_query qu) { |
442 | allocnode *an, *ann; | |
f318f883 | 443 | |
61093792 | 444 | cancel_children(qu); |
bc01473e | 445 | for (an= qu->allocations.head; an; an= ann) { ann= an->next; free(an); } |
9f1041a6 | 446 | LIST_INIT(qu->allocations); |
f318f883 | 447 | adns__vbuf_free(&qu->vb); |
fc86e61f | 448 | adns__vbuf_free(&qu->search_vb); |
b8d9a971 | 449 | free(qu->query_dgram); |
d94fa362 | 450 | qu->query_dgram= 0; |
f318f883 | 451 | } |
452 | ||
26eb6bdc | 453 | void adns_cancel(adns_query qu) { |
1389dc72 | 454 | adns_state ads; |
455 | ||
456 | ads= qu->ads; | |
2ac463bf | 457 | adns__consistency(ads,qu,cc_entex); |
0b772fb9 | 458 | if (qu->parent) LIST_UNLINK_PART(qu->parent->children,qu,siblings.); |
f318f883 | 459 | switch (qu->state) { |
d0a057ac | 460 | case query_tosend: |
461 | LIST_UNLINK(ads->udpw,qu); | |
f318f883 | 462 | break; |
d0a057ac | 463 | case query_tcpw: |
464 | LIST_UNLINK(ads->tcpw,qu); | |
465 | break; | |
466 | case query_childw: | |
1389dc72 | 467 | LIST_UNLINK(ads->childw,qu); |
f318f883 | 468 | break; |
469 | case query_done: | |
1389dc72 | 470 | LIST_UNLINK(ads->output,qu); |
f318f883 | 471 | break; |
472 | default: | |
473 | abort(); | |
474 | } | |
475 | free_query_allocs(qu); | |
476 | free(qu->answer); | |
477 | free(qu); | |
2ac463bf | 478 | adns__consistency(ads,0,cc_entex); |
f318f883 | 479 | } |
bc01473e | 480 | |
9c344a42 | 481 | void adns__update_expires(adns_query qu, unsigned long ttl, |
482 | struct timeval now) { | |
2c7b101b | 483 | time_t max; |
484 | ||
485 | assert(ttl <= MAXTTLBELIEVE); | |
486 | max= now.tv_sec + ttl; | |
487 | if (qu->expires < max) return; | |
488 | qu->expires= max; | |
489 | } | |
490 | ||
bc01473e | 491 | static void makefinal_query(adns_query qu) { |
5c596e4d | 492 | adns_answer *ans; |
f318f883 | 493 | int rrn; |
965c9782 | 494 | |
f318f883 | 495 | ans= qu->answer; |
bc01473e | 496 | |
f318f883 | 497 | if (qu->interim_allocd) { |
9c344a42 | 498 | ans= realloc(qu->answer, |
499 | MEM_ROUND(MEM_ROUND(sizeof(*ans)) + qu->interim_allocd)); | |
bc01473e | 500 | if (!ans) goto x_nomem; |
f2ad23ee | 501 | qu->answer= ans; |
502 | } | |
965c9782 | 503 | |
f318f883 | 504 | qu->final_allocspace= (byte*)ans + MEM_ROUND(sizeof(*ans)); |
965c9782 | 505 | adns__makefinal_str(qu,&ans->cname); |
b2988d3e | 506 | adns__makefinal_str(qu,&ans->owner); |
f318f883 | 507 | |
965c9782 | 508 | if (ans->nrrs) { |
f318f883 | 509 | adns__makefinal_block(qu, &ans->rrs.untyped, ans->nrrs*ans->rrsz); |
965c9782 | 510 | |
f318f883 | 511 | for (rrn=0; rrn<ans->nrrs; rrn++) |
512 | qu->typei->makefinal(qu, ans->rrs.bytes + rrn*ans->rrsz); | |
f318f883 | 513 | } |
2c7b101b | 514 | |
f318f883 | 515 | free_query_allocs(qu); |
bc01473e | 516 | return; |
965c9782 | 517 | |
bc01473e | 518 | x_nomem: |
1be24aef | 519 | qu->preserved_allocd= 0; |
bc01473e | 520 | qu->answer->cname= 0; |
1be24aef | 521 | qu->answer->owner= 0; |
522 | adns__reset_preserved(qu); /* (but we just threw away the preserved stuff) */ | |
523 | ||
524 | qu->answer->status= adns_s_nomemory; | |
bc01473e | 525 | free_query_allocs(qu); |
526 | } | |
527 | ||
528 | void adns__query_done(adns_query qu) { | |
529 | adns_answer *ans; | |
530 | adns_query parent; | |
531 | ||
cb32030b | 532 | cancel_children(qu); |
533 | ||
d05cc330 | 534 | qu->id= -1; |
bc01473e | 535 | ans= qu->answer; |
536 | ||
85021e18 | 537 | if (qu->flags & adns_qf_search && ans->status != adns_s_nomemory) { |
b2988d3e | 538 | if (!save_owner(qu, qu->search_vb.buf, qu->search_vb.used)) { |
539 | adns__query_fail(qu,adns_s_nomemory); | |
540 | return; | |
541 | } | |
542 | } | |
543 | ||
bc01473e | 544 | if (ans->nrrs && qu->typei->diff_needswap) { |
545 | if (!adns__vbuf_ensure(&qu->vb,qu->typei->rrsz)) { | |
9b86645c | 546 | adns__query_fail(qu,adns_s_nomemory); |
bc01473e | 547 | return; |
548 | } | |
549 | adns__isort(ans->rrs.bytes, ans->nrrs, ans->rrsz, | |
8c3aa944 | 550 | qu->vb.buf, |
9c344a42 | 551 | (int(*)(void*, const void*, const void*)) |
552 | qu->typei->diff_needswap, | |
8c3aa944 | 553 | qu->ads); |
bc01473e | 554 | } |
59d05d1c | 555 | if (ans->nrrs && qu->typei->postsort) { |
556 | qu->typei->postsort(qu->ads, ans->rrs.bytes, ans->nrrs, qu->typei); | |
557 | } | |
a095483e | 558 | |
2c7b101b | 559 | ans->expires= qu->expires; |
bc01473e | 560 | parent= qu->parent; |
561 | if (parent) { | |
562 | LIST_UNLINK_PART(parent->children,qu,siblings.); | |
cb32030b | 563 | LIST_UNLINK(qu->ads->childw,parent); |
cd1bde2f | 564 | qu->ctx.callback(parent,qu); |
bc01473e | 565 | free_query_allocs(qu); |
b8d9a971 | 566 | free(qu->answer); |
bc01473e | 567 | free(qu); |
bc01473e | 568 | } else { |
569 | makefinal_query(qu); | |
570 | LIST_LINK_TAIL(qu->ads->output,qu); | |
0b772fb9 | 571 | qu->state= query_done; |
bc01473e | 572 | } |
6f17710a | 573 | } |
574 | ||
11c8bf9b | 575 | void adns__query_fail(adns_query qu, adns_status stat) { |
1be24aef | 576 | adns__reset_preserved(qu); |
965c9782 | 577 | qu->answer->status= stat; |
11c8bf9b | 578 | adns__query_done(qu); |
6f17710a | 579 | } |
98db6da3 | 580 | |
581 | void adns__makefinal_str(adns_query qu, char **strp) { | |
582 | int l; | |
583 | char *before, *after; | |
584 | ||
585 | before= *strp; | |
9a2b67d4 | 586 | if (!before) return; |
98db6da3 | 587 | l= strlen(before)+1; |
588 | after= adns__alloc_final(qu,l); | |
589 | memcpy(after,before,l); | |
590 | *strp= after; | |
591 | } | |
592 | ||
11c8bf9b | 593 | void adns__makefinal_block(adns_query qu, void **blpp, size_t sz) { |
9a2b67d4 | 594 | void *before, *after; |
98db6da3 | 595 | |
9a2b67d4 | 596 | before= *blpp; |
597 | if (!before) return; | |
98db6da3 | 598 | after= adns__alloc_final(qu,sz); |
9a2b67d4 | 599 | memcpy(after,before,sz); |
98db6da3 | 600 | *blpp= after; |
601 | } |