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; |
e1d31292 | 86 | qu->answer->rrsz= typei->getrrsz ? typei->getrrsz(type) : 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 | |
27af7cd3 MW |
108 | if (typei->query_send) typei->query_send(qu,now); |
109 | else adns__query_send(qu, now); | |
7e6a84a1 | 110 | } |
111 | ||
112 | adns_status adns__internal_submit(adns_state ads, adns_query *query_r, | |
5f8085b7 MW |
113 | const typeinfo *typei, adns_rrtype type, |
114 | vbuf *qumsg_vb, int id, | |
7e6a84a1 | 115 | adns_queryflags flags, struct timeval now, |
116 | const qcontext *ctx) { | |
117 | adns_query qu; | |
118 | ||
27af7cd3 | 119 | qu= query_alloc(ads,typei,type,flags,now); |
7e6a84a1 | 120 | if (!qu) { adns__vbuf_free(qumsg_vb); return adns_s_nomemory; } |
121 | *query_r= qu; | |
98db6da3 | 122 | |
7e6a84a1 | 123 | memcpy(&qu->ctx,ctx,sizeof(qu->ctx)); |
124 | query_submit(ads,qu, typei,qumsg_vb,id,flags,now); | |
125 | ||
11c8bf9b | 126 | return adns_s_ok; |
7e6a84a1 | 127 | } |
128 | ||
129 | static void query_simple(adns_state ads, adns_query qu, | |
130 | const char *owner, int ol, | |
131 | const typeinfo *typei, adns_queryflags flags, | |
132 | struct timeval now) { | |
a880d9ba | 133 | vbuf vb_new; |
7e6a84a1 | 134 | int id; |
135 | adns_status stat; | |
98db6da3 | 136 | |
7d0aaee4 | 137 | stat= adns__mkquery(ads,&qu->vb,&id, owner,ol, |
138 | typei,qu->answer->type, flags); | |
a880d9ba | 139 | if (stat) { |
140 | if (stat == adns_s_querydomaintoolong && (flags & adns_qf_search)) { | |
141 | adns__search_next(ads,qu,now); | |
142 | return; | |
143 | } else { | |
144 | adns__query_fail(qu,stat); | |
145 | return; | |
146 | } | |
147 | } | |
148 | ||
149 | vb_new= qu->vb; | |
150 | adns__vbuf_init(&qu->vb); | |
151 | query_submit(ads,qu, typei,&vb_new,id, flags,now); | |
7e6a84a1 | 152 | } |
153 | ||
154 | void adns__search_next(adns_state ads, adns_query qu, struct timeval now) { | |
155 | const char *nextentry; | |
156 | adns_status stat; | |
157 | ||
158 | if (qu->search_doneabs<0) { | |
159 | nextentry= 0; | |
160 | qu->search_doneabs= 1; | |
161 | } else { | |
162 | if (qu->search_pos >= ads->nsearchlist) { | |
163 | if (qu->search_doneabs) { | |
85021e18 | 164 | qu->search_vb.used= qu->search_origlen; |
7e6a84a1 | 165 | stat= adns_s_nxdomain; goto x_fail; |
7e6a84a1 | 166 | } else { |
167 | nextentry= 0; | |
168 | qu->search_doneabs= 1; | |
169 | } | |
170 | } else { | |
171 | nextentry= ads->searchlist[qu->search_pos++]; | |
172 | } | |
173 | } | |
174 | ||
a5da6822 | 175 | qu->search_vb.used= qu->search_origlen; |
7e6a84a1 | 176 | if (nextentry) { |
177 | if (!adns__vbuf_append(&qu->search_vb,".",1) || | |
85021e18 | 178 | !adns__vbuf_appendstr(&qu->search_vb,nextentry)) |
179 | goto x_nomemory; | |
7e6a84a1 | 180 | } |
181 | ||
182 | free(qu->query_dgram); | |
183 | qu->query_dgram= 0; qu->query_dglen= 0; | |
184 | ||
9c344a42 | 185 | query_simple(ads,qu, qu->search_vb.buf, qu->search_vb.used, |
186 | qu->typei, qu->flags, now); | |
7e6a84a1 | 187 | return; |
85021e18 | 188 | |
189 | x_nomemory: | |
190 | stat= adns_s_nomemory; | |
7e6a84a1 | 191 | x_fail: |
192 | adns__query_fail(qu,stat); | |
48cb0b4b | 193 | } |
194 | ||
b2988d3e | 195 | static int save_owner(adns_query qu, const char *owner, int ol) { |
196 | /* Returns 1 if OK, otherwise there was no memory. */ | |
197 | adns_answer *ans; | |
198 | ||
85021e18 | 199 | if (!(qu->flags & adns_qf_owner)) return 1; |
200 | ||
b2988d3e | 201 | ans= qu->answer; |
202 | assert(!ans->owner); | |
203 | ||
1be24aef | 204 | ans->owner= adns__alloc_preserved(qu,ol+1); if (!ans->owner) return 0; |
b2988d3e | 205 | |
206 | memcpy(ans->owner,owner,ol); | |
207 | ans->owner[ol]= 0; | |
208 | return 1; | |
209 | } | |
210 | ||
98db6da3 | 211 | int adns_submit(adns_state ads, |
212 | const char *owner, | |
213 | adns_rrtype type, | |
edb95764 | 214 | adns_queryflags flags, |
98db6da3 | 215 | void *context, |
216 | adns_query *query_r) { | |
7e6a84a1 | 217 | int r, ol, ndots; |
11c8bf9b | 218 | adns_status stat; |
219 | const typeinfo *typei; | |
220 | struct timeval now; | |
7e6a84a1 | 221 | adns_query qu; |
222 | const char *p; | |
98db6da3 | 223 | |
2ac463bf | 224 | adns__consistency(ads,0,cc_entex); |
1389dc72 | 225 | |
11c8bf9b | 226 | typei= adns__findtype(type); |
125de2a9 | 227 | if (!typei) return ENOSYS; |
98db6da3 | 228 | |
7e6a84a1 | 229 | r= gettimeofday(&now,0); if (r) goto x_errno; |
7d0aaee4 | 230 | qu= query_alloc(ads,typei,type,flags,now); if (!qu) goto x_errno; |
7e6a84a1 | 231 | |
232 | qu->ctx.ext= context; | |
233 | qu->ctx.callback= 0; | |
334c6111 MW |
234 | memset(&qu->ctx.pinfo,0,sizeof(qu->ctx.pinfo)); |
235 | memset(&qu->ctx.tinfo,0,sizeof(qu->ctx.tinfo)); | |
98db6da3 | 236 | |
a5da6822 | 237 | *query_r= qu; |
238 | ||
98db6da3 | 239 | ol= strlen(owner); |
7e6a84a1 | 240 | if (!ol) { stat= adns_s_querydomaininvalid; goto x_adnsfail; } |
241 | if (ol>DNS_MAXDOMAIN+1) { stat= adns_s_querydomaintoolong; goto x_adnsfail; } | |
98db6da3 | 242 | |
7683abe2 | 243 | if (ol>=1 && owner[ol-1]=='.' && (ol<2 || owner[ol-2]!='\\')) { |
244 | flags &= ~adns_qf_search; | |
30c317a4 | 245 | qu->flags= flags; |
7683abe2 | 246 | ol--; |
247 | } | |
98db6da3 | 248 | |
7e6a84a1 | 249 | if (flags & adns_qf_search) { |
250 | r= adns__vbuf_append(&qu->search_vb,owner,ol); | |
251 | if (!r) { stat= adns_s_nomemory; goto x_adnsfail; } | |
252 | ||
253 | for (ndots=0, p=owner; (p= strchr(p,'.')); p++, ndots++); | |
254 | qu->search_doneabs= (ndots >= ads->searchndots) ? -1 : 0; | |
7e6a84a1 | 255 | qu->search_origlen= ol; |
7e6a84a1 | 256 | adns__search_next(ads,qu,now); |
a5da6822 | 257 | } else { |
b2988d3e | 258 | if (flags & adns_qf_owner) { |
259 | if (!save_owner(qu,owner,ol)) { stat= adns_s_nomemory; goto x_adnsfail; } | |
260 | } | |
a5da6822 | 261 | query_simple(ads,qu, owner,ol, typei,flags, now); |
7e6a84a1 | 262 | } |
ab898cf4 | 263 | adns__autosys(ads,now); |
2ac463bf | 264 | adns__consistency(ads,qu,cc_entex); |
7e6a84a1 | 265 | return 0; |
266 | ||
267 | x_adnsfail: | |
268 | adns__query_fail(qu,stat); | |
2ac463bf | 269 | adns__consistency(ads,qu,cc_entex); |
7e6a84a1 | 270 | return 0; |
271 | ||
272 | x_errno: | |
273 | r= errno; | |
274 | assert(r); | |
2ac463bf | 275 | adns__consistency(ads,0,cc_entex); |
7e6a84a1 | 276 | return r; |
96e79df5 | 277 | } |
278 | ||
8a53cf7f MW |
279 | static const char *default_zone = "<magic>"; |
280 | ||
d2f6d877 | 281 | int adns_submit_reverse_any(adns_state ads, |
282 | const struct sockaddr *addr, | |
283 | const char *zone, | |
284 | adns_rrtype type, | |
285 | adns_queryflags flags, | |
286 | void *context, | |
287 | adns_query *query_r) { | |
8a53cf7f | 288 | char *buf, *buf_free, *p; |
d2f6d877 | 289 | char shortbuf[100]; |
8a53cf7f | 290 | const afinfo *ai; |
d2f6d877 | 291 | int r, lreq; |
5e6342f0 | 292 | |
5e6342f0 | 293 | flags &= ~adns_qf_search; |
294 | ||
8a53cf7f MW |
295 | switch (addr->sa_family) { |
296 | case AF_INET: | |
297 | ai = &adns__inet_afinfo; | |
298 | if (zone == default_zone) zone = "in-addr.arpa"; | |
299 | break; | |
300 | case AF_INET6: | |
301 | ai = &adns__inet6_afinfo; | |
302 | if (zone == default_zone) zone = "ip6.arpa"; | |
303 | break; | |
304 | default: | |
305 | return ENOSYS; | |
306 | } | |
5e6342f0 | 307 | |
8a53cf7f | 308 | lreq= strlen(zone) + ai->nrevcomp*(ai->revcompwd + 1) + 1; |
d2f6d877 | 309 | if (lreq > sizeof(shortbuf)) { |
8a53cf7f | 310 | buf= malloc(lreq); |
d2f6d877 | 311 | if (!buf) return errno; |
312 | buf_free= buf; | |
313 | } else { | |
314 | buf= shortbuf; | |
315 | buf_free= 0; | |
316 | } | |
8a53cf7f MW |
317 | |
318 | p = ai->rev_mkname(addr, buf); | |
319 | *p++ = '.'; | |
320 | strcpy(p, zone); | |
5e6342f0 | 321 | |
d2f6d877 | 322 | r= adns_submit(ads,buf,type,flags,context,query_r); |
323 | free(buf_free); | |
324 | return r; | |
325 | } | |
326 | ||
327 | int adns_submit_reverse(adns_state ads, | |
328 | const struct sockaddr *addr, | |
329 | adns_rrtype type, | |
330 | adns_queryflags flags, | |
331 | void *context, | |
332 | adns_query *query_r) { | |
333 | if (type != adns_r_ptr && type != adns_r_ptr_raw) return EINVAL; | |
8a53cf7f | 334 | return adns_submit_reverse_any(ads,addr,default_zone, |
9c344a42 | 335 | type,flags,context,query_r); |
5e6342f0 | 336 | } |
337 | ||
98db6da3 | 338 | int adns_synchronous(adns_state ads, |
339 | const char *owner, | |
340 | adns_rrtype type, | |
edb95764 | 341 | adns_queryflags flags, |
98db6da3 | 342 | adns_answer **answer_r) { |
343 | adns_query qu; | |
344 | int r; | |
345 | ||
346 | r= adns_submit(ads,owner,type,flags,0,&qu); | |
347 | if (r) return r; | |
48cb0b4b | 348 | |
f318f883 | 349 | r= adns_wait(ads,&qu,answer_r,0); |
11c8bf9b | 350 | if (r) adns_cancel(qu); |
96e79df5 | 351 | |
f318f883 | 352 | return r; |
98db6da3 | 353 | } |
354 | ||
c9afe7bb | 355 | static void *alloc_common(adns_query qu, size_t sz) { |
98db6da3 | 356 | allocnode *an; |
357 | ||
f47cdeec | 358 | if (!sz) return qu; /* Any old pointer will do */ |
98db6da3 | 359 | assert(!qu->final_allocspace); |
98db6da3 | 360 | an= malloc(MEM_ROUND(MEM_ROUND(sizeof(*an)) + sz)); |
f2ad23ee | 361 | if (!an) return 0; |
bc01473e | 362 | LIST_LINK_TAIL(qu->allocations,an); |
5f8085b7 | 363 | an->sz = sz; |
98db6da3 | 364 | return (byte*)an + MEM_ROUND(sizeof(*an)); |
365 | } | |
48cb0b4b | 366 | |
c9afe7bb | 367 | void *adns__alloc_interim(adns_query qu, size_t sz) { |
1be24aef | 368 | void *rv; |
369 | ||
c9afe7bb | 370 | sz= MEM_ROUND(sz); |
1be24aef | 371 | rv= alloc_common(qu,sz); |
372 | if (!rv) return 0; | |
c9afe7bb | 373 | qu->interim_allocd += sz; |
1be24aef | 374 | return rv; |
375 | } | |
376 | ||
377 | void *adns__alloc_preserved(adns_query qu, size_t sz) { | |
378 | void *rv; | |
379 | ||
380 | sz= MEM_ROUND(sz); | |
381 | rv= adns__alloc_interim(qu,sz); | |
382 | if (!rv) return 0; | |
383 | qu->preserved_allocd += sz; | |
384 | return rv; | |
c9afe7bb | 385 | } |
386 | ||
37883323 | 387 | static allocnode *alloc_info(adns_query qu, void *p, size_t *sz_r) |
96818a13 | 388 | { |
5f8085b7 | 389 | allocnode *an; |
5f8085b7 | 390 | |
37883323 | 391 | if (!p || p == qu) { *sz_r = 0; return 0; } |
5f8085b7 | 392 | an = (allocnode *)((byte *)p - MEM_ROUND(sizeof(allocnode))); |
96818a13 MW |
393 | *sz_r = MEM_ROUND(an->sz); |
394 | return an; | |
395 | } | |
396 | ||
397 | void adns__free_interim(adns_query qu, void *p) { | |
398 | size_t sz; | |
37883323 | 399 | allocnode *an = alloc_info(qu, p, &sz); |
96818a13 MW |
400 | |
401 | if (!an) return; | |
402 | assert(!qu->final_allocspace); | |
5f8085b7 MW |
403 | LIST_UNLINK(qu->allocations, an); |
404 | free(an); | |
405 | qu->interim_allocd -= sz; | |
406 | } | |
407 | ||
c9afe7bb | 408 | void *adns__alloc_mine(adns_query qu, size_t sz) { |
409 | return alloc_common(qu,MEM_ROUND(sz)); | |
410 | } | |
411 | ||
96818a13 MW |
412 | void adns__transfer_interim(adns_query from, adns_query to, void *block) { |
413 | size_t sz; | |
37883323 | 414 | allocnode *an = alloc_info(from, block, &sz); |
bc01473e | 415 | |
96818a13 | 416 | if (!an) return; |
bc01473e | 417 | |
418 | assert(!to->final_allocspace); | |
419 | assert(!from->final_allocspace); | |
420 | ||
421 | LIST_UNLINK(from->allocations,an); | |
422 | LIST_LINK_TAIL(to->allocations,an); | |
423 | ||
424 | from->interim_allocd -= sz; | |
425 | to->interim_allocd += sz; | |
2c7b101b | 426 | |
427 | if (to->expires > from->expires) to->expires= from->expires; | |
bc01473e | 428 | } |
429 | ||
98db6da3 | 430 | void *adns__alloc_final(adns_query qu, size_t sz) { |
431 | /* When we're in the _final stage, we _subtract_ from interim_alloc'd | |
432 | * each allocation, and use final_allocspace to point to the next free | |
433 | * bit. | |
434 | */ | |
435 | void *rp; | |
436 | ||
437 | sz= MEM_ROUND(sz); | |
438 | rp= qu->final_allocspace; | |
439 | assert(rp); | |
440 | qu->interim_allocd -= sz; | |
441 | assert(qu->interim_allocd>=0); | |
442 | qu->final_allocspace= (byte*)rp + sz; | |
443 | return rp; | |
444 | } | |
445 | ||
5f8085b7 | 446 | void adns__cancel_children(adns_query qu) { |
61093792 | 447 | adns_query cqu, ncqu; |
448 | ||
449 | for (cqu= qu->children.head; cqu; cqu= ncqu) { | |
450 | ncqu= cqu->siblings.next; | |
451 | adns_cancel(cqu); | |
452 | } | |
61093792 | 453 | } |
454 | ||
1be24aef | 455 | void adns__reset_preserved(adns_query qu) { |
9a2b67d4 | 456 | assert(!qu->final_allocspace); |
5f8085b7 | 457 | adns__cancel_children(qu); |
98db6da3 | 458 | qu->answer->nrrs= 0; |
763d28b9 | 459 | qu->answer->rrs.untyped= 0; |
1be24aef | 460 | qu->interim_allocd= qu->preserved_allocd; |
d05cc330 | 461 | } |
462 | ||
f318f883 | 463 | static void free_query_allocs(adns_query qu) { |
464 | allocnode *an, *ann; | |
f318f883 | 465 | |
5f8085b7 | 466 | adns__cancel_children(qu); |
bc01473e | 467 | for (an= qu->allocations.head; an; an= ann) { ann= an->next; free(an); } |
9f1041a6 | 468 | LIST_INIT(qu->allocations); |
f318f883 | 469 | adns__vbuf_free(&qu->vb); |
fc86e61f | 470 | adns__vbuf_free(&qu->search_vb); |
b8d9a971 | 471 | free(qu->query_dgram); |
d94fa362 | 472 | qu->query_dgram= 0; |
f318f883 | 473 | } |
474 | ||
26eb6bdc | 475 | void adns_cancel(adns_query qu) { |
1389dc72 | 476 | adns_state ads; |
477 | ||
478 | ads= qu->ads; | |
2ac463bf | 479 | adns__consistency(ads,qu,cc_entex); |
0b772fb9 | 480 | if (qu->parent) LIST_UNLINK_PART(qu->parent->children,qu,siblings.); |
f318f883 | 481 | switch (qu->state) { |
d0a057ac | 482 | case query_tosend: |
483 | LIST_UNLINK(ads->udpw,qu); | |
f318f883 | 484 | break; |
d0a057ac | 485 | case query_tcpw: |
486 | LIST_UNLINK(ads->tcpw,qu); | |
487 | break; | |
488 | case query_childw: | |
1389dc72 | 489 | LIST_UNLINK(ads->childw,qu); |
f318f883 | 490 | break; |
491 | case query_done: | |
1389dc72 | 492 | LIST_UNLINK(ads->output,qu); |
f318f883 | 493 | break; |
494 | default: | |
495 | abort(); | |
496 | } | |
497 | free_query_allocs(qu); | |
498 | free(qu->answer); | |
499 | free(qu); | |
2ac463bf | 500 | adns__consistency(ads,0,cc_entex); |
f318f883 | 501 | } |
bc01473e | 502 | |
9c344a42 | 503 | void adns__update_expires(adns_query qu, unsigned long ttl, |
504 | struct timeval now) { | |
2c7b101b | 505 | time_t max; |
506 | ||
507 | assert(ttl <= MAXTTLBELIEVE); | |
508 | max= now.tv_sec + ttl; | |
509 | if (qu->expires < max) return; | |
510 | qu->expires= max; | |
511 | } | |
512 | ||
bc01473e | 513 | static void makefinal_query(adns_query qu) { |
5c596e4d | 514 | adns_answer *ans; |
f318f883 | 515 | int rrn; |
965c9782 | 516 | |
f318f883 | 517 | ans= qu->answer; |
bc01473e | 518 | |
f318f883 | 519 | if (qu->interim_allocd) { |
9c344a42 | 520 | ans= realloc(qu->answer, |
521 | MEM_ROUND(MEM_ROUND(sizeof(*ans)) + qu->interim_allocd)); | |
bc01473e | 522 | if (!ans) goto x_nomem; |
f2ad23ee | 523 | qu->answer= ans; |
524 | } | |
965c9782 | 525 | |
f318f883 | 526 | qu->final_allocspace= (byte*)ans + MEM_ROUND(sizeof(*ans)); |
965c9782 | 527 | adns__makefinal_str(qu,&ans->cname); |
b2988d3e | 528 | adns__makefinal_str(qu,&ans->owner); |
f318f883 | 529 | |
965c9782 | 530 | if (ans->nrrs) { |
f318f883 | 531 | adns__makefinal_block(qu, &ans->rrs.untyped, ans->nrrs*ans->rrsz); |
965c9782 | 532 | |
f318f883 | 533 | for (rrn=0; rrn<ans->nrrs; rrn++) |
534 | qu->typei->makefinal(qu, ans->rrs.bytes + rrn*ans->rrsz); | |
f318f883 | 535 | } |
2c7b101b | 536 | |
f318f883 | 537 | free_query_allocs(qu); |
bc01473e | 538 | return; |
965c9782 | 539 | |
bc01473e | 540 | x_nomem: |
1be24aef | 541 | qu->preserved_allocd= 0; |
bc01473e | 542 | qu->answer->cname= 0; |
1be24aef | 543 | qu->answer->owner= 0; |
544 | adns__reset_preserved(qu); /* (but we just threw away the preserved stuff) */ | |
545 | ||
546 | qu->answer->status= adns_s_nomemory; | |
bc01473e | 547 | free_query_allocs(qu); |
548 | } | |
549 | ||
550 | void adns__query_done(adns_query qu) { | |
551 | adns_answer *ans; | |
552 | adns_query parent; | |
553 | ||
5f8085b7 | 554 | adns__cancel_children(qu); |
cb32030b | 555 | |
d05cc330 | 556 | qu->id= -1; |
bc01473e | 557 | ans= qu->answer; |
558 | ||
85021e18 | 559 | if (qu->flags & adns_qf_search && ans->status != adns_s_nomemory) { |
b2988d3e | 560 | if (!save_owner(qu, qu->search_vb.buf, qu->search_vb.used)) { |
561 | adns__query_fail(qu,adns_s_nomemory); | |
562 | return; | |
563 | } | |
564 | } | |
565 | ||
bc01473e | 566 | if (ans->nrrs && qu->typei->diff_needswap) { |
5f8085b7 | 567 | if (!adns__vbuf_ensure(&qu->vb,ans->rrsz)) { |
9b86645c | 568 | adns__query_fail(qu,adns_s_nomemory); |
bc01473e | 569 | return; |
570 | } | |
571 | adns__isort(ans->rrs.bytes, ans->nrrs, ans->rrsz, | |
8c3aa944 | 572 | qu->vb.buf, |
9c344a42 | 573 | (int(*)(void*, const void*, const void*)) |
574 | qu->typei->diff_needswap, | |
8c3aa944 | 575 | qu->ads); |
bc01473e | 576 | } |
59d05d1c | 577 | if (ans->nrrs && qu->typei->postsort) { |
578 | qu->typei->postsort(qu->ads, ans->rrs.bytes, ans->nrrs, qu->typei); | |
579 | } | |
a095483e | 580 | |
2c7b101b | 581 | ans->expires= qu->expires; |
bc01473e | 582 | parent= qu->parent; |
583 | if (parent) { | |
584 | LIST_UNLINK_PART(parent->children,qu,siblings.); | |
cb32030b | 585 | LIST_UNLINK(qu->ads->childw,parent); |
cd1bde2f | 586 | qu->ctx.callback(parent,qu); |
bc01473e | 587 | free_query_allocs(qu); |
b8d9a971 | 588 | free(qu->answer); |
bc01473e | 589 | free(qu); |
bc01473e | 590 | } else { |
591 | makefinal_query(qu); | |
592 | LIST_LINK_TAIL(qu->ads->output,qu); | |
0b772fb9 | 593 | qu->state= query_done; |
bc01473e | 594 | } |
6f17710a | 595 | } |
596 | ||
11c8bf9b | 597 | void adns__query_fail(adns_query qu, adns_status stat) { |
1be24aef | 598 | adns__reset_preserved(qu); |
965c9782 | 599 | qu->answer->status= stat; |
11c8bf9b | 600 | adns__query_done(qu); |
6f17710a | 601 | } |
98db6da3 | 602 | |
603 | void adns__makefinal_str(adns_query qu, char **strp) { | |
604 | int l; | |
605 | char *before, *after; | |
606 | ||
607 | before= *strp; | |
9a2b67d4 | 608 | if (!before) return; |
98db6da3 | 609 | l= strlen(before)+1; |
610 | after= adns__alloc_final(qu,l); | |
611 | memcpy(after,before,l); | |
612 | *strp= after; | |
613 | } | |
614 | ||
11c8bf9b | 615 | void adns__makefinal_block(adns_query qu, void **blpp, size_t sz) { |
9a2b67d4 | 616 | void *before, *after; |
98db6da3 | 617 | |
9a2b67d4 | 618 | before= *blpp; |
619 | if (!before) return; | |
98db6da3 | 620 | after= adns__alloc_final(qu,sz); |
9a2b67d4 | 621 | memcpy(after,before,sz); |
98db6da3 | 622 | *blpp= after; |
623 | } |