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); | |
5f8085b7 MW |
107 | |
108 | if (typei->query_send && !(qu->flags & adns__qf_senddirect)) | |
109 | typei->query_send(qu,now); | |
110 | else | |
111 | adns__query_send(qu, now); | |
7e6a84a1 | 112 | } |
113 | ||
114 | adns_status adns__internal_submit(adns_state ads, adns_query *query_r, | |
5f8085b7 MW |
115 | const typeinfo *typei, adns_rrtype type, |
116 | vbuf *qumsg_vb, int id, | |
7e6a84a1 | 117 | adns_queryflags flags, struct timeval now, |
118 | const qcontext *ctx) { | |
119 | adns_query qu; | |
120 | ||
5f8085b7 | 121 | qu= query_alloc(ads,typei,type,flags,now); |
7e6a84a1 | 122 | if (!qu) { adns__vbuf_free(qumsg_vb); return adns_s_nomemory; } |
123 | *query_r= qu; | |
98db6da3 | 124 | |
7e6a84a1 | 125 | memcpy(&qu->ctx,ctx,sizeof(qu->ctx)); |
126 | query_submit(ads,qu, typei,qumsg_vb,id,flags,now); | |
127 | ||
11c8bf9b | 128 | return adns_s_ok; |
7e6a84a1 | 129 | } |
130 | ||
131 | static void query_simple(adns_state ads, adns_query qu, | |
132 | const char *owner, int ol, | |
133 | const typeinfo *typei, adns_queryflags flags, | |
134 | struct timeval now) { | |
a880d9ba | 135 | vbuf vb_new; |
7e6a84a1 | 136 | int id; |
137 | adns_status stat; | |
98db6da3 | 138 | |
7d0aaee4 | 139 | stat= adns__mkquery(ads,&qu->vb,&id, owner,ol, |
140 | typei,qu->answer->type, flags); | |
a880d9ba | 141 | if (stat) { |
142 | if (stat == adns_s_querydomaintoolong && (flags & adns_qf_search)) { | |
143 | adns__search_next(ads,qu,now); | |
144 | return; | |
145 | } else { | |
146 | adns__query_fail(qu,stat); | |
147 | return; | |
148 | } | |
149 | } | |
150 | ||
151 | vb_new= qu->vb; | |
152 | adns__vbuf_init(&qu->vb); | |
153 | query_submit(ads,qu, typei,&vb_new,id, flags,now); | |
7e6a84a1 | 154 | } |
155 | ||
156 | void adns__search_next(adns_state ads, adns_query qu, struct timeval now) { | |
157 | const char *nextentry; | |
158 | adns_status stat; | |
159 | ||
160 | if (qu->search_doneabs<0) { | |
161 | nextentry= 0; | |
162 | qu->search_doneabs= 1; | |
163 | } else { | |
164 | if (qu->search_pos >= ads->nsearchlist) { | |
165 | if (qu->search_doneabs) { | |
85021e18 | 166 | qu->search_vb.used= qu->search_origlen; |
7e6a84a1 | 167 | stat= adns_s_nxdomain; goto x_fail; |
7e6a84a1 | 168 | } else { |
169 | nextentry= 0; | |
170 | qu->search_doneabs= 1; | |
171 | } | |
172 | } else { | |
173 | nextentry= ads->searchlist[qu->search_pos++]; | |
174 | } | |
175 | } | |
176 | ||
a5da6822 | 177 | qu->search_vb.used= qu->search_origlen; |
7e6a84a1 | 178 | if (nextentry) { |
179 | if (!adns__vbuf_append(&qu->search_vb,".",1) || | |
85021e18 | 180 | !adns__vbuf_appendstr(&qu->search_vb,nextentry)) |
181 | goto x_nomemory; | |
7e6a84a1 | 182 | } |
183 | ||
184 | free(qu->query_dgram); | |
185 | qu->query_dgram= 0; qu->query_dglen= 0; | |
186 | ||
9c344a42 | 187 | query_simple(ads,qu, qu->search_vb.buf, qu->search_vb.used, |
188 | qu->typei, qu->flags, now); | |
7e6a84a1 | 189 | return; |
85021e18 | 190 | |
191 | x_nomemory: | |
192 | stat= adns_s_nomemory; | |
7e6a84a1 | 193 | x_fail: |
194 | adns__query_fail(qu,stat); | |
48cb0b4b | 195 | } |
196 | ||
b2988d3e | 197 | static int save_owner(adns_query qu, const char *owner, int ol) { |
198 | /* Returns 1 if OK, otherwise there was no memory. */ | |
199 | adns_answer *ans; | |
200 | ||
85021e18 | 201 | if (!(qu->flags & adns_qf_owner)) return 1; |
202 | ||
b2988d3e | 203 | ans= qu->answer; |
204 | assert(!ans->owner); | |
205 | ||
1be24aef | 206 | ans->owner= adns__alloc_preserved(qu,ol+1); if (!ans->owner) return 0; |
b2988d3e | 207 | |
208 | memcpy(ans->owner,owner,ol); | |
209 | ans->owner[ol]= 0; | |
210 | return 1; | |
211 | } | |
212 | ||
98db6da3 | 213 | int adns_submit(adns_state ads, |
214 | const char *owner, | |
215 | adns_rrtype type, | |
edb95764 | 216 | adns_queryflags flags, |
98db6da3 | 217 | void *context, |
218 | adns_query *query_r) { | |
7e6a84a1 | 219 | int r, ol, ndots; |
11c8bf9b | 220 | adns_status stat; |
221 | const typeinfo *typei; | |
222 | struct timeval now; | |
7e6a84a1 | 223 | adns_query qu; |
224 | const char *p; | |
98db6da3 | 225 | |
2ac463bf | 226 | adns__consistency(ads,0,cc_entex); |
1389dc72 | 227 | |
5f8085b7 MW |
228 | if (!(type & adns__qtf_bigaddr) || !(type & adns__qtf_manyaf)) |
229 | flags = (flags & ~adns__qf_afmask) | adns_qf_ipv4_only; | |
230 | ||
11c8bf9b | 231 | typei= adns__findtype(type); |
125de2a9 | 232 | if (!typei) return ENOSYS; |
98db6da3 | 233 | |
7e6a84a1 | 234 | r= gettimeofday(&now,0); if (r) goto x_errno; |
7d0aaee4 | 235 | qu= query_alloc(ads,typei,type,flags,now); if (!qu) goto x_errno; |
7e6a84a1 | 236 | |
237 | qu->ctx.ext= context; | |
238 | qu->ctx.callback= 0; | |
239 | memset(&qu->ctx.info,0,sizeof(qu->ctx.info)); | |
98db6da3 | 240 | |
a5da6822 | 241 | *query_r= qu; |
242 | ||
98db6da3 | 243 | ol= strlen(owner); |
7e6a84a1 | 244 | if (!ol) { stat= adns_s_querydomaininvalid; goto x_adnsfail; } |
245 | if (ol>DNS_MAXDOMAIN+1) { stat= adns_s_querydomaintoolong; goto x_adnsfail; } | |
98db6da3 | 246 | |
7683abe2 | 247 | if (ol>=1 && owner[ol-1]=='.' && (ol<2 || owner[ol-2]!='\\')) { |
248 | flags &= ~adns_qf_search; | |
30c317a4 | 249 | qu->flags= flags; |
7683abe2 | 250 | ol--; |
251 | } | |
98db6da3 | 252 | |
7e6a84a1 | 253 | if (flags & adns_qf_search) { |
254 | r= adns__vbuf_append(&qu->search_vb,owner,ol); | |
255 | if (!r) { stat= adns_s_nomemory; goto x_adnsfail; } | |
256 | ||
257 | for (ndots=0, p=owner; (p= strchr(p,'.')); p++, ndots++); | |
258 | qu->search_doneabs= (ndots >= ads->searchndots) ? -1 : 0; | |
7e6a84a1 | 259 | qu->search_origlen= ol; |
7e6a84a1 | 260 | adns__search_next(ads,qu,now); |
a5da6822 | 261 | } else { |
b2988d3e | 262 | if (flags & adns_qf_owner) { |
263 | if (!save_owner(qu,owner,ol)) { stat= adns_s_nomemory; goto x_adnsfail; } | |
264 | } | |
a5da6822 | 265 | query_simple(ads,qu, owner,ol, typei,flags, now); |
7e6a84a1 | 266 | } |
ab898cf4 | 267 | adns__autosys(ads,now); |
2ac463bf | 268 | adns__consistency(ads,qu,cc_entex); |
7e6a84a1 | 269 | return 0; |
270 | ||
271 | x_adnsfail: | |
272 | adns__query_fail(qu,stat); | |
2ac463bf | 273 | adns__consistency(ads,qu,cc_entex); |
7e6a84a1 | 274 | return 0; |
275 | ||
276 | x_errno: | |
277 | r= errno; | |
278 | assert(r); | |
2ac463bf | 279 | adns__consistency(ads,0,cc_entex); |
7e6a84a1 | 280 | return r; |
96e79df5 | 281 | } |
282 | ||
8a53cf7f MW |
283 | static const char *default_zone = "<magic>"; |
284 | ||
d2f6d877 | 285 | int adns_submit_reverse_any(adns_state ads, |
286 | const struct sockaddr *addr, | |
287 | const char *zone, | |
288 | adns_rrtype type, | |
289 | adns_queryflags flags, | |
290 | void *context, | |
291 | adns_query *query_r) { | |
8a53cf7f | 292 | char *buf, *buf_free, *p; |
d2f6d877 | 293 | char shortbuf[100]; |
8a53cf7f | 294 | const afinfo *ai; |
d2f6d877 | 295 | int r, lreq; |
5e6342f0 | 296 | |
5e6342f0 | 297 | flags &= ~adns_qf_search; |
298 | ||
8a53cf7f MW |
299 | switch (addr->sa_family) { |
300 | case AF_INET: | |
301 | ai = &adns__inet_afinfo; | |
302 | if (zone == default_zone) zone = "in-addr.arpa"; | |
303 | break; | |
304 | case AF_INET6: | |
305 | ai = &adns__inet6_afinfo; | |
306 | if (zone == default_zone) zone = "ip6.arpa"; | |
307 | break; | |
308 | default: | |
309 | return ENOSYS; | |
310 | } | |
5e6342f0 | 311 | |
8a53cf7f | 312 | lreq= strlen(zone) + ai->nrevcomp*(ai->revcompwd + 1) + 1; |
d2f6d877 | 313 | if (lreq > sizeof(shortbuf)) { |
8a53cf7f | 314 | buf= malloc(lreq); |
d2f6d877 | 315 | if (!buf) return errno; |
316 | buf_free= buf; | |
317 | } else { | |
318 | buf= shortbuf; | |
319 | buf_free= 0; | |
320 | } | |
8a53cf7f MW |
321 | |
322 | p = ai->rev_mkname(addr, buf); | |
323 | *p++ = '.'; | |
324 | strcpy(p, zone); | |
5e6342f0 | 325 | |
d2f6d877 | 326 | r= adns_submit(ads,buf,type,flags,context,query_r); |
327 | free(buf_free); | |
328 | return r; | |
329 | } | |
330 | ||
331 | int adns_submit_reverse(adns_state ads, | |
332 | const struct sockaddr *addr, | |
333 | adns_rrtype type, | |
334 | adns_queryflags flags, | |
335 | void *context, | |
336 | adns_query *query_r) { | |
337 | if (type != adns_r_ptr && type != adns_r_ptr_raw) return EINVAL; | |
8a53cf7f | 338 | return adns_submit_reverse_any(ads,addr,default_zone, |
9c344a42 | 339 | type,flags,context,query_r); |
5e6342f0 | 340 | } |
341 | ||
98db6da3 | 342 | int adns_synchronous(adns_state ads, |
343 | const char *owner, | |
344 | adns_rrtype type, | |
edb95764 | 345 | adns_queryflags flags, |
98db6da3 | 346 | adns_answer **answer_r) { |
347 | adns_query qu; | |
348 | int r; | |
349 | ||
350 | r= adns_submit(ads,owner,type,flags,0,&qu); | |
351 | if (r) return r; | |
48cb0b4b | 352 | |
f318f883 | 353 | r= adns_wait(ads,&qu,answer_r,0); |
11c8bf9b | 354 | if (r) adns_cancel(qu); |
96e79df5 | 355 | |
f318f883 | 356 | return r; |
98db6da3 | 357 | } |
358 | ||
c9afe7bb | 359 | static void *alloc_common(adns_query qu, size_t sz) { |
98db6da3 | 360 | allocnode *an; |
361 | ||
f47cdeec | 362 | if (!sz) return qu; /* Any old pointer will do */ |
98db6da3 | 363 | assert(!qu->final_allocspace); |
98db6da3 | 364 | an= malloc(MEM_ROUND(MEM_ROUND(sizeof(*an)) + sz)); |
f2ad23ee | 365 | if (!an) return 0; |
bc01473e | 366 | LIST_LINK_TAIL(qu->allocations,an); |
5f8085b7 | 367 | an->sz = sz; |
98db6da3 | 368 | return (byte*)an + MEM_ROUND(sizeof(*an)); |
369 | } | |
48cb0b4b | 370 | |
c9afe7bb | 371 | void *adns__alloc_interim(adns_query qu, size_t sz) { |
1be24aef | 372 | void *rv; |
373 | ||
c9afe7bb | 374 | sz= MEM_ROUND(sz); |
1be24aef | 375 | rv= alloc_common(qu,sz); |
376 | if (!rv) return 0; | |
c9afe7bb | 377 | qu->interim_allocd += sz; |
1be24aef | 378 | return rv; |
379 | } | |
380 | ||
381 | void *adns__alloc_preserved(adns_query qu, size_t sz) { | |
382 | void *rv; | |
383 | ||
384 | sz= MEM_ROUND(sz); | |
385 | rv= adns__alloc_interim(qu,sz); | |
386 | if (!rv) return 0; | |
387 | qu->preserved_allocd += sz; | |
388 | return rv; | |
c9afe7bb | 389 | } |
390 | ||
5f8085b7 MW |
391 | void adns__free_interim(adns_query qu, void *p) { |
392 | allocnode *an; | |
393 | size_t sz; | |
394 | ||
395 | if (!p) return; | |
396 | an = (allocnode *)((byte *)p - MEM_ROUND(sizeof(allocnode))); | |
397 | sz = MEM_ROUND(an->sz); | |
398 | LIST_UNLINK(qu->allocations, an); | |
399 | free(an); | |
400 | qu->interim_allocd -= sz; | |
401 | } | |
402 | ||
c9afe7bb | 403 | void *adns__alloc_mine(adns_query qu, size_t sz) { |
404 | return alloc_common(qu,MEM_ROUND(sz)); | |
405 | } | |
406 | ||
9c344a42 | 407 | void adns__transfer_interim(adns_query from, adns_query to, |
408 | void *block, size_t sz) { | |
bc01473e | 409 | allocnode *an; |
410 | ||
411 | if (!block) return; | |
412 | an= (void*)((byte*)block - MEM_ROUND(sizeof(*an))); | |
413 | ||
414 | assert(!to->final_allocspace); | |
415 | assert(!from->final_allocspace); | |
416 | ||
417 | LIST_UNLINK(from->allocations,an); | |
418 | LIST_LINK_TAIL(to->allocations,an); | |
419 | ||
647d5ec1 | 420 | sz= MEM_ROUND(sz); |
bc01473e | 421 | from->interim_allocd -= sz; |
422 | to->interim_allocd += sz; | |
2c7b101b | 423 | |
424 | if (to->expires > from->expires) to->expires= from->expires; | |
bc01473e | 425 | } |
426 | ||
98db6da3 | 427 | void *adns__alloc_final(adns_query qu, size_t sz) { |
428 | /* When we're in the _final stage, we _subtract_ from interim_alloc'd | |
429 | * each allocation, and use final_allocspace to point to the next free | |
430 | * bit. | |
431 | */ | |
432 | void *rp; | |
433 | ||
434 | sz= MEM_ROUND(sz); | |
435 | rp= qu->final_allocspace; | |
436 | assert(rp); | |
437 | qu->interim_allocd -= sz; | |
438 | assert(qu->interim_allocd>=0); | |
439 | qu->final_allocspace= (byte*)rp + sz; | |
440 | return rp; | |
441 | } | |
442 | ||
5f8085b7 | 443 | void adns__cancel_children(adns_query qu) { |
61093792 | 444 | adns_query cqu, ncqu; |
445 | ||
446 | for (cqu= qu->children.head; cqu; cqu= ncqu) { | |
447 | ncqu= cqu->siblings.next; | |
448 | adns_cancel(cqu); | |
449 | } | |
61093792 | 450 | } |
451 | ||
1be24aef | 452 | void adns__reset_preserved(adns_query qu) { |
9a2b67d4 | 453 | assert(!qu->final_allocspace); |
5f8085b7 | 454 | adns__cancel_children(qu); |
98db6da3 | 455 | qu->answer->nrrs= 0; |
763d28b9 | 456 | qu->answer->rrs.untyped= 0; |
1be24aef | 457 | qu->interim_allocd= qu->preserved_allocd; |
d05cc330 | 458 | } |
459 | ||
f318f883 | 460 | static void free_query_allocs(adns_query qu) { |
461 | allocnode *an, *ann; | |
f318f883 | 462 | |
5f8085b7 | 463 | adns__cancel_children(qu); |
bc01473e | 464 | for (an= qu->allocations.head; an; an= ann) { ann= an->next; free(an); } |
9f1041a6 | 465 | LIST_INIT(qu->allocations); |
f318f883 | 466 | adns__vbuf_free(&qu->vb); |
fc86e61f | 467 | adns__vbuf_free(&qu->search_vb); |
b8d9a971 | 468 | free(qu->query_dgram); |
d94fa362 | 469 | qu->query_dgram= 0; |
f318f883 | 470 | } |
471 | ||
26eb6bdc | 472 | void adns_cancel(adns_query qu) { |
1389dc72 | 473 | adns_state ads; |
474 | ||
475 | ads= qu->ads; | |
2ac463bf | 476 | adns__consistency(ads,qu,cc_entex); |
0b772fb9 | 477 | if (qu->parent) LIST_UNLINK_PART(qu->parent->children,qu,siblings.); |
f318f883 | 478 | switch (qu->state) { |
d0a057ac | 479 | case query_tosend: |
480 | LIST_UNLINK(ads->udpw,qu); | |
f318f883 | 481 | break; |
d0a057ac | 482 | case query_tcpw: |
483 | LIST_UNLINK(ads->tcpw,qu); | |
484 | break; | |
485 | case query_childw: | |
1389dc72 | 486 | LIST_UNLINK(ads->childw,qu); |
f318f883 | 487 | break; |
488 | case query_done: | |
1389dc72 | 489 | LIST_UNLINK(ads->output,qu); |
f318f883 | 490 | break; |
491 | default: | |
492 | abort(); | |
493 | } | |
494 | free_query_allocs(qu); | |
495 | free(qu->answer); | |
496 | free(qu); | |
2ac463bf | 497 | adns__consistency(ads,0,cc_entex); |
f318f883 | 498 | } |
bc01473e | 499 | |
9c344a42 | 500 | void adns__update_expires(adns_query qu, unsigned long ttl, |
501 | struct timeval now) { | |
2c7b101b | 502 | time_t max; |
503 | ||
504 | assert(ttl <= MAXTTLBELIEVE); | |
505 | max= now.tv_sec + ttl; | |
506 | if (qu->expires < max) return; | |
507 | qu->expires= max; | |
508 | } | |
509 | ||
bc01473e | 510 | static void makefinal_query(adns_query qu) { |
5c596e4d | 511 | adns_answer *ans; |
f318f883 | 512 | int rrn; |
965c9782 | 513 | |
f318f883 | 514 | ans= qu->answer; |
bc01473e | 515 | |
f318f883 | 516 | if (qu->interim_allocd) { |
9c344a42 | 517 | ans= realloc(qu->answer, |
518 | MEM_ROUND(MEM_ROUND(sizeof(*ans)) + qu->interim_allocd)); | |
bc01473e | 519 | if (!ans) goto x_nomem; |
f2ad23ee | 520 | qu->answer= ans; |
521 | } | |
965c9782 | 522 | |
f318f883 | 523 | qu->final_allocspace= (byte*)ans + MEM_ROUND(sizeof(*ans)); |
965c9782 | 524 | adns__makefinal_str(qu,&ans->cname); |
b2988d3e | 525 | adns__makefinal_str(qu,&ans->owner); |
f318f883 | 526 | |
965c9782 | 527 | if (ans->nrrs) { |
f318f883 | 528 | adns__makefinal_block(qu, &ans->rrs.untyped, ans->nrrs*ans->rrsz); |
965c9782 | 529 | |
f318f883 | 530 | for (rrn=0; rrn<ans->nrrs; rrn++) |
531 | qu->typei->makefinal(qu, ans->rrs.bytes + rrn*ans->rrsz); | |
f318f883 | 532 | } |
2c7b101b | 533 | |
f318f883 | 534 | free_query_allocs(qu); |
bc01473e | 535 | return; |
965c9782 | 536 | |
bc01473e | 537 | x_nomem: |
1be24aef | 538 | qu->preserved_allocd= 0; |
bc01473e | 539 | qu->answer->cname= 0; |
1be24aef | 540 | qu->answer->owner= 0; |
541 | adns__reset_preserved(qu); /* (but we just threw away the preserved stuff) */ | |
542 | ||
543 | qu->answer->status= adns_s_nomemory; | |
bc01473e | 544 | free_query_allocs(qu); |
545 | } | |
546 | ||
547 | void adns__query_done(adns_query qu) { | |
548 | adns_answer *ans; | |
549 | adns_query parent; | |
550 | ||
5f8085b7 | 551 | adns__cancel_children(qu); |
cb32030b | 552 | |
d05cc330 | 553 | qu->id= -1; |
bc01473e | 554 | ans= qu->answer; |
555 | ||
85021e18 | 556 | if (qu->flags & adns_qf_search && ans->status != adns_s_nomemory) { |
b2988d3e | 557 | if (!save_owner(qu, qu->search_vb.buf, qu->search_vb.used)) { |
558 | adns__query_fail(qu,adns_s_nomemory); | |
559 | return; | |
560 | } | |
561 | } | |
562 | ||
bc01473e | 563 | if (ans->nrrs && qu->typei->diff_needswap) { |
5f8085b7 | 564 | if (!adns__vbuf_ensure(&qu->vb,ans->rrsz)) { |
9b86645c | 565 | adns__query_fail(qu,adns_s_nomemory); |
bc01473e | 566 | return; |
567 | } | |
568 | adns__isort(ans->rrs.bytes, ans->nrrs, ans->rrsz, | |
8c3aa944 | 569 | qu->vb.buf, |
9c344a42 | 570 | (int(*)(void*, const void*, const void*)) |
571 | qu->typei->diff_needswap, | |
8c3aa944 | 572 | qu->ads); |
bc01473e | 573 | } |
59d05d1c | 574 | if (ans->nrrs && qu->typei->postsort) { |
575 | qu->typei->postsort(qu->ads, ans->rrs.bytes, ans->nrrs, qu->typei); | |
576 | } | |
a095483e | 577 | |
2c7b101b | 578 | ans->expires= qu->expires; |
bc01473e | 579 | parent= qu->parent; |
580 | if (parent) { | |
581 | LIST_UNLINK_PART(parent->children,qu,siblings.); | |
cb32030b | 582 | LIST_UNLINK(qu->ads->childw,parent); |
cd1bde2f | 583 | qu->ctx.callback(parent,qu); |
bc01473e | 584 | free_query_allocs(qu); |
b8d9a971 | 585 | free(qu->answer); |
bc01473e | 586 | free(qu); |
bc01473e | 587 | } else { |
588 | makefinal_query(qu); | |
589 | LIST_LINK_TAIL(qu->ads->output,qu); | |
0b772fb9 | 590 | qu->state= query_done; |
bc01473e | 591 | } |
6f17710a | 592 | } |
593 | ||
11c8bf9b | 594 | void adns__query_fail(adns_query qu, adns_status stat) { |
1be24aef | 595 | adns__reset_preserved(qu); |
965c9782 | 596 | qu->answer->status= stat; |
11c8bf9b | 597 | adns__query_done(qu); |
6f17710a | 598 | } |
98db6da3 | 599 | |
600 | void adns__makefinal_str(adns_query qu, char **strp) { | |
601 | int l; | |
602 | char *before, *after; | |
603 | ||
604 | before= *strp; | |
9a2b67d4 | 605 | if (!before) return; |
98db6da3 | 606 | l= strlen(before)+1; |
607 | after= adns__alloc_final(qu,l); | |
608 | memcpy(after,before,l); | |
609 | *strp= after; | |
610 | } | |
611 | ||
11c8bf9b | 612 | void adns__makefinal_block(adns_query qu, void **blpp, size_t sz) { |
9a2b67d4 | 613 | void *before, *after; |
98db6da3 | 614 | |
9a2b67d4 | 615 | before= *blpp; |
616 | if (!before) return; | |
98db6da3 | 617 | after= adns__alloc_final(qu,sz); |
9a2b67d4 | 618 | memcpy(after,before,sz); |
98db6da3 | 619 | *blpp= after; |
620 | } |