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 | |
5f8085b7 MW |
226 | if (!(type & adns__qtf_bigaddr) || !(type & adns__qtf_manyaf)) |
227 | flags = (flags & ~adns__qf_afmask) | adns_qf_ipv4_only; | |
228 | ||
11c8bf9b | 229 | typei= adns__findtype(type); |
125de2a9 | 230 | if (!typei) return ENOSYS; |
98db6da3 | 231 | |
7e6a84a1 | 232 | r= gettimeofday(&now,0); if (r) goto x_errno; |
7d0aaee4 | 233 | qu= query_alloc(ads,typei,type,flags,now); if (!qu) goto x_errno; |
7e6a84a1 | 234 | |
235 | qu->ctx.ext= context; | |
236 | qu->ctx.callback= 0; | |
334c6111 MW |
237 | memset(&qu->ctx.pinfo,0,sizeof(qu->ctx.pinfo)); |
238 | memset(&qu->ctx.tinfo,0,sizeof(qu->ctx.tinfo)); | |
98db6da3 | 239 | |
a5da6822 | 240 | *query_r= qu; |
241 | ||
98db6da3 | 242 | ol= strlen(owner); |
7e6a84a1 | 243 | if (!ol) { stat= adns_s_querydomaininvalid; goto x_adnsfail; } |
244 | if (ol>DNS_MAXDOMAIN+1) { stat= adns_s_querydomaintoolong; goto x_adnsfail; } | |
98db6da3 | 245 | |
7683abe2 | 246 | if (ol>=1 && owner[ol-1]=='.' && (ol<2 || owner[ol-2]!='\\')) { |
247 | flags &= ~adns_qf_search; | |
30c317a4 | 248 | qu->flags= flags; |
7683abe2 | 249 | ol--; |
250 | } | |
98db6da3 | 251 | |
7e6a84a1 | 252 | if (flags & adns_qf_search) { |
253 | r= adns__vbuf_append(&qu->search_vb,owner,ol); | |
254 | if (!r) { stat= adns_s_nomemory; goto x_adnsfail; } | |
255 | ||
256 | for (ndots=0, p=owner; (p= strchr(p,'.')); p++, ndots++); | |
257 | qu->search_doneabs= (ndots >= ads->searchndots) ? -1 : 0; | |
7e6a84a1 | 258 | qu->search_origlen= ol; |
7e6a84a1 | 259 | adns__search_next(ads,qu,now); |
a5da6822 | 260 | } else { |
b2988d3e | 261 | if (flags & adns_qf_owner) { |
262 | if (!save_owner(qu,owner,ol)) { stat= adns_s_nomemory; goto x_adnsfail; } | |
263 | } | |
a5da6822 | 264 | query_simple(ads,qu, owner,ol, typei,flags, now); |
7e6a84a1 | 265 | } |
ab898cf4 | 266 | adns__autosys(ads,now); |
2ac463bf | 267 | adns__consistency(ads,qu,cc_entex); |
7e6a84a1 | 268 | return 0; |
269 | ||
270 | x_adnsfail: | |
271 | adns__query_fail(qu,stat); | |
2ac463bf | 272 | adns__consistency(ads,qu,cc_entex); |
7e6a84a1 | 273 | return 0; |
274 | ||
275 | x_errno: | |
276 | r= errno; | |
277 | assert(r); | |
2ac463bf | 278 | adns__consistency(ads,0,cc_entex); |
7e6a84a1 | 279 | return r; |
96e79df5 | 280 | } |
281 | ||
8a53cf7f MW |
282 | static const char *default_zone = "<magic>"; |
283 | ||
d2f6d877 | 284 | int adns_submit_reverse_any(adns_state ads, |
285 | const struct sockaddr *addr, | |
286 | const char *zone, | |
287 | adns_rrtype type, | |
288 | adns_queryflags flags, | |
289 | void *context, | |
290 | adns_query *query_r) { | |
8a53cf7f | 291 | char *buf, *buf_free, *p; |
d2f6d877 | 292 | char shortbuf[100]; |
8a53cf7f | 293 | const afinfo *ai; |
d2f6d877 | 294 | int r, lreq; |
5e6342f0 | 295 | |
5e6342f0 | 296 | flags &= ~adns_qf_search; |
297 | ||
8a53cf7f MW |
298 | switch (addr->sa_family) { |
299 | case AF_INET: | |
300 | ai = &adns__inet_afinfo; | |
301 | if (zone == default_zone) zone = "in-addr.arpa"; | |
302 | break; | |
303 | case AF_INET6: | |
304 | ai = &adns__inet6_afinfo; | |
305 | if (zone == default_zone) zone = "ip6.arpa"; | |
306 | break; | |
307 | default: | |
308 | return ENOSYS; | |
309 | } | |
5e6342f0 | 310 | |
8a53cf7f | 311 | lreq= strlen(zone) + ai->nrevcomp*(ai->revcompwd + 1) + 1; |
d2f6d877 | 312 | if (lreq > sizeof(shortbuf)) { |
8a53cf7f | 313 | buf= malloc(lreq); |
d2f6d877 | 314 | if (!buf) return errno; |
315 | buf_free= buf; | |
316 | } else { | |
317 | buf= shortbuf; | |
318 | buf_free= 0; | |
319 | } | |
8a53cf7f MW |
320 | |
321 | p = ai->rev_mkname(addr, buf); | |
322 | *p++ = '.'; | |
323 | strcpy(p, zone); | |
5e6342f0 | 324 | |
d2f6d877 | 325 | r= adns_submit(ads,buf,type,flags,context,query_r); |
326 | free(buf_free); | |
327 | return r; | |
328 | } | |
329 | ||
330 | int adns_submit_reverse(adns_state ads, | |
331 | const struct sockaddr *addr, | |
332 | adns_rrtype type, | |
333 | adns_queryflags flags, | |
334 | void *context, | |
335 | adns_query *query_r) { | |
336 | if (type != adns_r_ptr && type != adns_r_ptr_raw) return EINVAL; | |
8a53cf7f | 337 | return adns_submit_reverse_any(ads,addr,default_zone, |
9c344a42 | 338 | type,flags,context,query_r); |
5e6342f0 | 339 | } |
340 | ||
98db6da3 | 341 | int adns_synchronous(adns_state ads, |
342 | const char *owner, | |
343 | adns_rrtype type, | |
edb95764 | 344 | adns_queryflags flags, |
98db6da3 | 345 | adns_answer **answer_r) { |
346 | adns_query qu; | |
347 | int r; | |
348 | ||
349 | r= adns_submit(ads,owner,type,flags,0,&qu); | |
350 | if (r) return r; | |
48cb0b4b | 351 | |
f318f883 | 352 | r= adns_wait(ads,&qu,answer_r,0); |
11c8bf9b | 353 | if (r) adns_cancel(qu); |
96e79df5 | 354 | |
f318f883 | 355 | return r; |
98db6da3 | 356 | } |
357 | ||
c9afe7bb | 358 | static void *alloc_common(adns_query qu, size_t sz) { |
98db6da3 | 359 | allocnode *an; |
360 | ||
f47cdeec | 361 | if (!sz) return qu; /* Any old pointer will do */ |
98db6da3 | 362 | assert(!qu->final_allocspace); |
98db6da3 | 363 | an= malloc(MEM_ROUND(MEM_ROUND(sizeof(*an)) + sz)); |
f2ad23ee | 364 | if (!an) return 0; |
bc01473e | 365 | LIST_LINK_TAIL(qu->allocations,an); |
5f8085b7 | 366 | an->sz = sz; |
98db6da3 | 367 | return (byte*)an + MEM_ROUND(sizeof(*an)); |
368 | } | |
48cb0b4b | 369 | |
c9afe7bb | 370 | void *adns__alloc_interim(adns_query qu, size_t sz) { |
1be24aef | 371 | void *rv; |
372 | ||
c9afe7bb | 373 | sz= MEM_ROUND(sz); |
1be24aef | 374 | rv= alloc_common(qu,sz); |
375 | if (!rv) return 0; | |
c9afe7bb | 376 | qu->interim_allocd += sz; |
1be24aef | 377 | return rv; |
378 | } | |
379 | ||
380 | void *adns__alloc_preserved(adns_query qu, size_t sz) { | |
381 | void *rv; | |
382 | ||
383 | sz= MEM_ROUND(sz); | |
384 | rv= adns__alloc_interim(qu,sz); | |
385 | if (!rv) return 0; | |
386 | qu->preserved_allocd += sz; | |
387 | return rv; | |
c9afe7bb | 388 | } |
389 | ||
37883323 | 390 | static allocnode *alloc_info(adns_query qu, void *p, size_t *sz_r) |
96818a13 | 391 | { |
5f8085b7 | 392 | allocnode *an; |
5f8085b7 | 393 | |
37883323 | 394 | if (!p || p == qu) { *sz_r = 0; return 0; } |
5f8085b7 | 395 | an = (allocnode *)((byte *)p - MEM_ROUND(sizeof(allocnode))); |
96818a13 MW |
396 | *sz_r = MEM_ROUND(an->sz); |
397 | return an; | |
398 | } | |
399 | ||
400 | void adns__free_interim(adns_query qu, void *p) { | |
401 | size_t sz; | |
37883323 | 402 | allocnode *an = alloc_info(qu, p, &sz); |
96818a13 MW |
403 | |
404 | if (!an) return; | |
405 | assert(!qu->final_allocspace); | |
5f8085b7 MW |
406 | LIST_UNLINK(qu->allocations, an); |
407 | free(an); | |
408 | qu->interim_allocd -= sz; | |
409 | } | |
410 | ||
c9afe7bb | 411 | void *adns__alloc_mine(adns_query qu, size_t sz) { |
412 | return alloc_common(qu,MEM_ROUND(sz)); | |
413 | } | |
414 | ||
96818a13 MW |
415 | void adns__transfer_interim(adns_query from, adns_query to, void *block) { |
416 | size_t sz; | |
37883323 | 417 | allocnode *an = alloc_info(from, block, &sz); |
bc01473e | 418 | |
96818a13 | 419 | if (!an) return; |
bc01473e | 420 | |
421 | assert(!to->final_allocspace); | |
422 | assert(!from->final_allocspace); | |
423 | ||
424 | LIST_UNLINK(from->allocations,an); | |
425 | LIST_LINK_TAIL(to->allocations,an); | |
426 | ||
427 | from->interim_allocd -= sz; | |
428 | to->interim_allocd += sz; | |
2c7b101b | 429 | |
430 | if (to->expires > from->expires) to->expires= from->expires; | |
bc01473e | 431 | } |
432 | ||
98db6da3 | 433 | void *adns__alloc_final(adns_query qu, size_t sz) { |
434 | /* When we're in the _final stage, we _subtract_ from interim_alloc'd | |
435 | * each allocation, and use final_allocspace to point to the next free | |
436 | * bit. | |
437 | */ | |
438 | void *rp; | |
439 | ||
440 | sz= MEM_ROUND(sz); | |
441 | rp= qu->final_allocspace; | |
442 | assert(rp); | |
443 | qu->interim_allocd -= sz; | |
444 | assert(qu->interim_allocd>=0); | |
445 | qu->final_allocspace= (byte*)rp + sz; | |
446 | return rp; | |
447 | } | |
448 | ||
5f8085b7 | 449 | void adns__cancel_children(adns_query qu) { |
61093792 | 450 | adns_query cqu, ncqu; |
451 | ||
452 | for (cqu= qu->children.head; cqu; cqu= ncqu) { | |
453 | ncqu= cqu->siblings.next; | |
454 | adns_cancel(cqu); | |
455 | } | |
61093792 | 456 | } |
457 | ||
1be24aef | 458 | void adns__reset_preserved(adns_query qu) { |
9a2b67d4 | 459 | assert(!qu->final_allocspace); |
5f8085b7 | 460 | adns__cancel_children(qu); |
98db6da3 | 461 | qu->answer->nrrs= 0; |
763d28b9 | 462 | qu->answer->rrs.untyped= 0; |
1be24aef | 463 | qu->interim_allocd= qu->preserved_allocd; |
d05cc330 | 464 | } |
465 | ||
f318f883 | 466 | static void free_query_allocs(adns_query qu) { |
467 | allocnode *an, *ann; | |
f318f883 | 468 | |
5f8085b7 | 469 | adns__cancel_children(qu); |
bc01473e | 470 | for (an= qu->allocations.head; an; an= ann) { ann= an->next; free(an); } |
9f1041a6 | 471 | LIST_INIT(qu->allocations); |
f318f883 | 472 | adns__vbuf_free(&qu->vb); |
fc86e61f | 473 | adns__vbuf_free(&qu->search_vb); |
b8d9a971 | 474 | free(qu->query_dgram); |
d94fa362 | 475 | qu->query_dgram= 0; |
f318f883 | 476 | } |
477 | ||
26eb6bdc | 478 | void adns_cancel(adns_query qu) { |
1389dc72 | 479 | adns_state ads; |
480 | ||
481 | ads= qu->ads; | |
2ac463bf | 482 | adns__consistency(ads,qu,cc_entex); |
0b772fb9 | 483 | if (qu->parent) LIST_UNLINK_PART(qu->parent->children,qu,siblings.); |
f318f883 | 484 | switch (qu->state) { |
d0a057ac | 485 | case query_tosend: |
486 | LIST_UNLINK(ads->udpw,qu); | |
f318f883 | 487 | break; |
d0a057ac | 488 | case query_tcpw: |
489 | LIST_UNLINK(ads->tcpw,qu); | |
490 | break; | |
491 | case query_childw: | |
1389dc72 | 492 | LIST_UNLINK(ads->childw,qu); |
f318f883 | 493 | break; |
494 | case query_done: | |
1389dc72 | 495 | LIST_UNLINK(ads->output,qu); |
f318f883 | 496 | break; |
497 | default: | |
498 | abort(); | |
499 | } | |
500 | free_query_allocs(qu); | |
501 | free(qu->answer); | |
502 | free(qu); | |
2ac463bf | 503 | adns__consistency(ads,0,cc_entex); |
f318f883 | 504 | } |
bc01473e | 505 | |
9c344a42 | 506 | void adns__update_expires(adns_query qu, unsigned long ttl, |
507 | struct timeval now) { | |
2c7b101b | 508 | time_t max; |
509 | ||
510 | assert(ttl <= MAXTTLBELIEVE); | |
511 | max= now.tv_sec + ttl; | |
512 | if (qu->expires < max) return; | |
513 | qu->expires= max; | |
514 | } | |
515 | ||
bc01473e | 516 | static void makefinal_query(adns_query qu) { |
5c596e4d | 517 | adns_answer *ans; |
f318f883 | 518 | int rrn; |
965c9782 | 519 | |
f318f883 | 520 | ans= qu->answer; |
bc01473e | 521 | |
f318f883 | 522 | if (qu->interim_allocd) { |
9c344a42 | 523 | ans= realloc(qu->answer, |
524 | MEM_ROUND(MEM_ROUND(sizeof(*ans)) + qu->interim_allocd)); | |
bc01473e | 525 | if (!ans) goto x_nomem; |
f2ad23ee | 526 | qu->answer= ans; |
527 | } | |
965c9782 | 528 | |
f318f883 | 529 | qu->final_allocspace= (byte*)ans + MEM_ROUND(sizeof(*ans)); |
965c9782 | 530 | adns__makefinal_str(qu,&ans->cname); |
b2988d3e | 531 | adns__makefinal_str(qu,&ans->owner); |
f318f883 | 532 | |
965c9782 | 533 | if (ans->nrrs) { |
f318f883 | 534 | adns__makefinal_block(qu, &ans->rrs.untyped, ans->nrrs*ans->rrsz); |
965c9782 | 535 | |
f318f883 | 536 | for (rrn=0; rrn<ans->nrrs; rrn++) |
537 | qu->typei->makefinal(qu, ans->rrs.bytes + rrn*ans->rrsz); | |
f318f883 | 538 | } |
2c7b101b | 539 | |
f318f883 | 540 | free_query_allocs(qu); |
bc01473e | 541 | return; |
965c9782 | 542 | |
bc01473e | 543 | x_nomem: |
1be24aef | 544 | qu->preserved_allocd= 0; |
bc01473e | 545 | qu->answer->cname= 0; |
1be24aef | 546 | qu->answer->owner= 0; |
547 | adns__reset_preserved(qu); /* (but we just threw away the preserved stuff) */ | |
548 | ||
549 | qu->answer->status= adns_s_nomemory; | |
bc01473e | 550 | free_query_allocs(qu); |
551 | } | |
552 | ||
553 | void adns__query_done(adns_query qu) { | |
554 | adns_answer *ans; | |
555 | adns_query parent; | |
556 | ||
5f8085b7 | 557 | adns__cancel_children(qu); |
cb32030b | 558 | |
d05cc330 | 559 | qu->id= -1; |
bc01473e | 560 | ans= qu->answer; |
561 | ||
85021e18 | 562 | if (qu->flags & adns_qf_search && ans->status != adns_s_nomemory) { |
b2988d3e | 563 | if (!save_owner(qu, qu->search_vb.buf, qu->search_vb.used)) { |
564 | adns__query_fail(qu,adns_s_nomemory); | |
565 | return; | |
566 | } | |
567 | } | |
568 | ||
bc01473e | 569 | if (ans->nrrs && qu->typei->diff_needswap) { |
5f8085b7 | 570 | if (!adns__vbuf_ensure(&qu->vb,ans->rrsz)) { |
9b86645c | 571 | adns__query_fail(qu,adns_s_nomemory); |
bc01473e | 572 | return; |
573 | } | |
574 | adns__isort(ans->rrs.bytes, ans->nrrs, ans->rrsz, | |
8c3aa944 | 575 | qu->vb.buf, |
9c344a42 | 576 | (int(*)(void*, const void*, const void*)) |
577 | qu->typei->diff_needswap, | |
8c3aa944 | 578 | qu->ads); |
bc01473e | 579 | } |
59d05d1c | 580 | if (ans->nrrs && qu->typei->postsort) { |
581 | qu->typei->postsort(qu->ads, ans->rrs.bytes, ans->nrrs, qu->typei); | |
582 | } | |
a095483e | 583 | |
2c7b101b | 584 | ans->expires= qu->expires; |
bc01473e | 585 | parent= qu->parent; |
586 | if (parent) { | |
587 | LIST_UNLINK_PART(parent->children,qu,siblings.); | |
cb32030b | 588 | LIST_UNLINK(qu->ads->childw,parent); |
cd1bde2f | 589 | qu->ctx.callback(parent,qu); |
bc01473e | 590 | free_query_allocs(qu); |
b8d9a971 | 591 | free(qu->answer); |
bc01473e | 592 | free(qu); |
bc01473e | 593 | } else { |
594 | makefinal_query(qu); | |
595 | LIST_LINK_TAIL(qu->ads->output,qu); | |
0b772fb9 | 596 | qu->state= query_done; |
bc01473e | 597 | } |
6f17710a | 598 | } |
599 | ||
11c8bf9b | 600 | void adns__query_fail(adns_query qu, adns_status stat) { |
1be24aef | 601 | adns__reset_preserved(qu); |
965c9782 | 602 | qu->answer->status= stat; |
11c8bf9b | 603 | adns__query_done(qu); |
6f17710a | 604 | } |
98db6da3 | 605 | |
606 | void adns__makefinal_str(adns_query qu, char **strp) { | |
607 | int l; | |
608 | char *before, *after; | |
609 | ||
610 | before= *strp; | |
9a2b67d4 | 611 | if (!before) return; |
98db6da3 | 612 | l= strlen(before)+1; |
613 | after= adns__alloc_final(qu,l); | |
614 | memcpy(after,before,l); | |
615 | *strp= after; | |
616 | } | |
617 | ||
11c8bf9b | 618 | void adns__makefinal_block(adns_query qu, void **blpp, size_t sz) { |
9a2b67d4 | 619 | void *before, *after; |
98db6da3 | 620 | |
9a2b67d4 | 621 | before= *blpp; |
622 | if (!before) return; | |
98db6da3 | 623 | after= adns__alloc_final(qu,sz); |
9a2b67d4 | 624 | memcpy(after,before,sz); |
98db6da3 | 625 | *blpp= after; |
626 | } |