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 | ||
e8e5aeac MW |
111 | adns_status adns__ckl_hostname(adns_state ads, adns_queryflags flags, |
112 | union checklabel_state *cls, | |
113 | qcontext *ctx, int labnum, | |
114 | const char *label, int lablen) | |
115 | { | |
116 | int i, c; | |
117 | ||
118 | if (flags & adns_qf_quoteok_query) return adns_s_ok; | |
119 | for (i=0; i<lablen; i++) { | |
120 | c= label[i]; | |
121 | if (c == '-') { | |
122 | if (!i) return adns_s_querydomaininvalid; | |
123 | } else if (!ctype_alpha(c) && !ctype_digit(c)) { | |
124 | return adns_s_querydomaininvalid; | |
125 | } | |
126 | } | |
127 | return adns_s_ok; | |
128 | } | |
129 | ||
130 | static adns_status check_domain_name(adns_state ads, adns_queryflags flags, | |
131 | qcontext *ctx, const typeinfo *typei, | |
132 | const byte *dgram, int dglen) | |
133 | { | |
134 | findlabel_state fls; | |
135 | adns_status err; | |
136 | int labnum= 0, labstart, lablen; | |
137 | union checklabel_state cls; | |
138 | ||
139 | adns__findlabel_start(&fls,ads, -1,0, dgram,dglen,dglen, DNS_HDRSIZE,0); | |
140 | do { | |
141 | err= adns__findlabel_next(&fls, &lablen,&labstart); | |
142 | assert(!err); assert(lablen >= 0); | |
143 | err= typei->checklabel(ads,flags, &cls,ctx, | |
144 | labnum++, dgram+labstart,lablen); | |
145 | if (err) return err; | |
146 | } while (lablen); | |
147 | return adns_s_ok; | |
148 | } | |
149 | ||
660d7d3b | 150 | adns_status adns__internal_submit(adns_state ads, adns_query *query_r, |
609133ee | 151 | const typeinfo *typei, vbuf *qumsg_vb, |
152 | int id, | |
660d7d3b | 153 | adns_queryflags flags, struct timeval now, |
be4d66dc | 154 | qcontext *ctx) { |
660d7d3b | 155 | adns_query qu; |
e8e5aeac | 156 | adns_status err; |
660d7d3b | 157 | |
e8e5aeac MW |
158 | err= check_domain_name(ads, flags,ctx,typei, qumsg_vb->buf,qumsg_vb->used); |
159 | if (err) goto x_err; | |
2c6eb096 | 160 | qu= query_alloc(ads,typei,typei->typekey,flags,now); |
e8e5aeac | 161 | if (!qu) { err = adns_s_nomemory; goto x_err; } |
660d7d3b | 162 | *query_r= qu; |
e576be50 | 163 | |
660d7d3b | 164 | memcpy(&qu->ctx,ctx,sizeof(qu->ctx)); |
165 | query_submit(ads,qu, typei,qumsg_vb,id,flags,now); | |
166 | ||
3955725c | 167 | return adns_s_ok; |
e8e5aeac MW |
168 | |
169 | x_err: | |
170 | adns__vbuf_free(qumsg_vb); | |
171 | return err; | |
660d7d3b | 172 | } |
173 | ||
174 | static void query_simple(adns_state ads, adns_query qu, | |
175 | const char *owner, int ol, | |
176 | const typeinfo *typei, adns_queryflags flags, | |
177 | struct timeval now) { | |
149dd923 | 178 | vbuf vb_new; |
660d7d3b | 179 | int id; |
180 | adns_status stat; | |
e576be50 | 181 | |
2c6eb096 | 182 | stat= adns__mkquery(ads,&qu->vb,&id, owner,ol, |
183 | typei,qu->answer->type, flags); | |
149dd923 | 184 | if (stat) { |
185 | if (stat == adns_s_querydomaintoolong && (flags & adns_qf_search)) { | |
186 | adns__search_next(ads,qu,now); | |
187 | return; | |
188 | } else { | |
189 | adns__query_fail(qu,stat); | |
190 | return; | |
191 | } | |
192 | } | |
193 | ||
e8e5aeac MW |
194 | stat= check_domain_name(ads, flags,&qu->ctx,typei, qu->vb.buf,qu->vb.used); |
195 | if (stat) { adns__query_fail(qu,stat); return; } | |
196 | ||
149dd923 | 197 | vb_new= qu->vb; |
198 | adns__vbuf_init(&qu->vb); | |
199 | query_submit(ads,qu, typei,&vb_new,id, flags,now); | |
660d7d3b | 200 | } |
201 | ||
202 | void adns__search_next(adns_state ads, adns_query qu, struct timeval now) { | |
203 | const char *nextentry; | |
204 | adns_status stat; | |
205 | ||
206 | if (qu->search_doneabs<0) { | |
207 | nextentry= 0; | |
208 | qu->search_doneabs= 1; | |
209 | } else { | |
210 | if (qu->search_pos >= ads->nsearchlist) { | |
211 | if (qu->search_doneabs) { | |
ac015392 | 212 | qu->search_vb.used= qu->search_origlen; |
660d7d3b | 213 | stat= adns_s_nxdomain; goto x_fail; |
660d7d3b | 214 | } else { |
215 | nextentry= 0; | |
216 | qu->search_doneabs= 1; | |
217 | } | |
218 | } else { | |
219 | nextentry= ads->searchlist[qu->search_pos++]; | |
220 | } | |
221 | } | |
222 | ||
e2632eb9 | 223 | qu->search_vb.used= qu->search_origlen; |
660d7d3b | 224 | if (nextentry) { |
225 | if (!adns__vbuf_append(&qu->search_vb,".",1) || | |
ac015392 | 226 | !adns__vbuf_appendstr(&qu->search_vb,nextentry)) |
227 | goto x_nomemory; | |
660d7d3b | 228 | } |
229 | ||
230 | free(qu->query_dgram); | |
231 | qu->query_dgram= 0; qu->query_dglen= 0; | |
232 | ||
609133ee | 233 | query_simple(ads,qu, qu->search_vb.buf, qu->search_vb.used, |
234 | qu->typei, qu->flags, now); | |
660d7d3b | 235 | return; |
ac015392 | 236 | |
237 | x_nomemory: | |
238 | stat= adns_s_nomemory; | |
660d7d3b | 239 | x_fail: |
240 | adns__query_fail(qu,stat); | |
4bec51a4 | 241 | } |
242 | ||
22181a31 | 243 | static int save_owner(adns_query qu, const char *owner, int ol) { |
244 | /* Returns 1 if OK, otherwise there was no memory. */ | |
245 | adns_answer *ans; | |
246 | ||
ac015392 | 247 | if (!(qu->flags & adns_qf_owner)) return 1; |
248 | ||
22181a31 | 249 | ans= qu->answer; |
250 | assert(!ans->owner); | |
251 | ||
8b3d55e3 | 252 | ans->owner= adns__alloc_preserved(qu,ol+1); if (!ans->owner) return 0; |
22181a31 | 253 | |
254 | memcpy(ans->owner,owner,ol); | |
255 | ans->owner[ol]= 0; | |
256 | return 1; | |
257 | } | |
258 | ||
e576be50 | 259 | int adns_submit(adns_state ads, |
260 | const char *owner, | |
261 | adns_rrtype type, | |
e563872a | 262 | adns_queryflags flags, |
e576be50 | 263 | void *context, |
264 | adns_query *query_r) { | |
660d7d3b | 265 | int r, ol, ndots; |
3955725c | 266 | adns_status stat; |
267 | const typeinfo *typei; | |
268 | struct timeval now; | |
660d7d3b | 269 | adns_query qu; |
270 | const char *p; | |
e576be50 | 271 | |
28de6442 | 272 | adns__consistency(ads,0,cc_entex); |
3e2e5fab | 273 | |
3955725c | 274 | typei= adns__findtype(type); |
636b69b1 | 275 | if (!typei) return ENOSYS; |
e576be50 | 276 | |
660d7d3b | 277 | r= gettimeofday(&now,0); if (r) goto x_errno; |
2c6eb096 | 278 | qu= query_alloc(ads,typei,type,flags,now); if (!qu) goto x_errno; |
660d7d3b | 279 | |
280 | qu->ctx.ext= context; | |
281 | qu->ctx.callback= 0; | |
0ea82d76 MW |
282 | memset(&qu->ctx.pinfo,0,sizeof(qu->ctx.pinfo)); |
283 | memset(&qu->ctx.tinfo,0,sizeof(qu->ctx.tinfo)); | |
e576be50 | 284 | |
e2632eb9 | 285 | *query_r= qu; |
286 | ||
e576be50 | 287 | ol= strlen(owner); |
660d7d3b | 288 | if (!ol) { stat= adns_s_querydomaininvalid; goto x_adnsfail; } |
289 | if (ol>DNS_MAXDOMAIN+1) { stat= adns_s_querydomaintoolong; goto x_adnsfail; } | |
e576be50 | 290 | |
e9e53c73 | 291 | if (ol>=1 && owner[ol-1]=='.' && (ol<2 || owner[ol-2]!='\\')) { |
292 | flags &= ~adns_qf_search; | |
3d1ae6ea | 293 | qu->flags= flags; |
e9e53c73 | 294 | ol--; |
295 | } | |
e576be50 | 296 | |
f6fe6b8d MW |
297 | /* temporary hack */ |
298 | #define CHECK_PTR do { \ | |
299 | if (type == adns_r_ptr && (ol < 5 || \ | |
300 | strncmp(owner + ol - 5, ".arpa", 5))) { \ | |
301 | ads->nextid++; adns__autosys(ads,now); \ | |
302 | stat= adns_s_querydomainwrong; goto x_adnsfail; \ | |
303 | } \ | |
304 | } while (0) | |
305 | ||
660d7d3b | 306 | if (flags & adns_qf_search) { |
f6fe6b8d | 307 | CHECK_PTR; |
660d7d3b | 308 | r= adns__vbuf_append(&qu->search_vb,owner,ol); |
309 | if (!r) { stat= adns_s_nomemory; goto x_adnsfail; } | |
310 | ||
311 | for (ndots=0, p=owner; (p= strchr(p,'.')); p++, ndots++); | |
312 | qu->search_doneabs= (ndots >= ads->searchndots) ? -1 : 0; | |
660d7d3b | 313 | qu->search_origlen= ol; |
660d7d3b | 314 | adns__search_next(ads,qu,now); |
e2632eb9 | 315 | } else { |
22181a31 | 316 | if (flags & adns_qf_owner) { |
317 | if (!save_owner(qu,owner,ol)) { stat= adns_s_nomemory; goto x_adnsfail; } | |
318 | } | |
f6fe6b8d | 319 | CHECK_PTR; |
e2632eb9 | 320 | query_simple(ads,qu, owner,ol, typei,flags, now); |
660d7d3b | 321 | } |
70ad7a2a | 322 | adns__autosys(ads,now); |
28de6442 | 323 | adns__consistency(ads,qu,cc_entex); |
660d7d3b | 324 | return 0; |
325 | ||
f6fe6b8d MW |
326 | #undef CHECK_PTR |
327 | ||
660d7d3b | 328 | x_adnsfail: |
329 | adns__query_fail(qu,stat); | |
28de6442 | 330 | adns__consistency(ads,qu,cc_entex); |
660d7d3b | 331 | return 0; |
332 | ||
333 | x_errno: | |
334 | r= errno; | |
335 | assert(r); | |
28de6442 | 336 | adns__consistency(ads,0,cc_entex); |
660d7d3b | 337 | return r; |
ddfda861 | 338 | } |
339 | ||
2b1c6979 | 340 | int adns_submit_reverse_any(adns_state ads, |
341 | const struct sockaddr *addr, | |
342 | const char *zone, | |
343 | adns_rrtype type, | |
344 | adns_queryflags flags, | |
345 | void *context, | |
346 | adns_query *query_r) { | |
d7449548 | 347 | const unsigned char *iaddr; |
2b1c6979 | 348 | char *buf, *buf_free; |
349 | char shortbuf[100]; | |
350 | int r, lreq; | |
d7449548 | 351 | |
d7449548 | 352 | flags &= ~adns_qf_search; |
353 | ||
354 | if (addr->sa_family != AF_INET) return ENOSYS; | |
609133ee | 355 | iaddr= (const unsigned char*) |
356 | &(((const struct sockaddr_in*)addr) -> sin_addr); | |
d7449548 | 357 | |
2b1c6979 | 358 | lreq= strlen(zone) + 4*4 + 1; |
359 | if (lreq > sizeof(shortbuf)) { | |
360 | buf= malloc(strlen(zone) + 4*4 + 1); | |
361 | if (!buf) return errno; | |
362 | buf_free= buf; | |
363 | } else { | |
364 | buf= shortbuf; | |
365 | buf_free= 0; | |
366 | } | |
367 | sprintf(buf, "%d.%d.%d.%d.%s", iaddr[3], iaddr[2], iaddr[1], iaddr[0], zone); | |
d7449548 | 368 | |
2b1c6979 | 369 | r= adns_submit(ads,buf,type,flags,context,query_r); |
370 | free(buf_free); | |
371 | return r; | |
372 | } | |
373 | ||
374 | int adns_submit_reverse(adns_state ads, | |
375 | const struct sockaddr *addr, | |
376 | adns_rrtype type, | |
377 | adns_queryflags flags, | |
378 | void *context, | |
379 | adns_query *query_r) { | |
380 | if (type != adns_r_ptr && type != adns_r_ptr_raw) return EINVAL; | |
609133ee | 381 | return adns_submit_reverse_any(ads,addr,"in-addr.arpa", |
382 | type,flags,context,query_r); | |
d7449548 | 383 | } |
384 | ||
e576be50 | 385 | int adns_synchronous(adns_state ads, |
386 | const char *owner, | |
387 | adns_rrtype type, | |
e563872a | 388 | adns_queryflags flags, |
e576be50 | 389 | adns_answer **answer_r) { |
390 | adns_query qu; | |
391 | int r; | |
392 | ||
393 | r= adns_submit(ads,owner,type,flags,0,&qu); | |
394 | if (r) return r; | |
4bec51a4 | 395 | |
88372443 | 396 | r= adns_wait(ads,&qu,answer_r,0); |
3955725c | 397 | if (r) adns_cancel(qu); |
ddfda861 | 398 | |
88372443 | 399 | return r; |
e576be50 | 400 | } |
401 | ||
f759e52e | 402 | static void *alloc_common(adns_query qu, size_t sz) { |
e576be50 | 403 | allocnode *an; |
404 | ||
a49a6d7b | 405 | if (!sz) return qu; /* Any old pointer will do */ |
e576be50 | 406 | assert(!qu->final_allocspace); |
e576be50 | 407 | an= malloc(MEM_ROUND(MEM_ROUND(sizeof(*an)) + sz)); |
e062dcae | 408 | if (!an) return 0; |
551ff40f | 409 | LIST_LINK_TAIL(qu->allocations,an); |
e576be50 | 410 | return (byte*)an + MEM_ROUND(sizeof(*an)); |
411 | } | |
4bec51a4 | 412 | |
f759e52e | 413 | void *adns__alloc_interim(adns_query qu, size_t sz) { |
8b3d55e3 | 414 | void *rv; |
415 | ||
f759e52e | 416 | sz= MEM_ROUND(sz); |
8b3d55e3 | 417 | rv= alloc_common(qu,sz); |
418 | if (!rv) return 0; | |
f759e52e | 419 | qu->interim_allocd += sz; |
8b3d55e3 | 420 | return rv; |
421 | } | |
422 | ||
423 | void *adns__alloc_preserved(adns_query qu, size_t sz) { | |
424 | void *rv; | |
425 | ||
426 | sz= MEM_ROUND(sz); | |
427 | rv= adns__alloc_interim(qu,sz); | |
428 | if (!rv) return 0; | |
429 | qu->preserved_allocd += sz; | |
430 | return rv; | |
f759e52e | 431 | } |
432 | ||
433 | void *adns__alloc_mine(adns_query qu, size_t sz) { | |
434 | return alloc_common(qu,MEM_ROUND(sz)); | |
435 | } | |
436 | ||
609133ee | 437 | void adns__transfer_interim(adns_query from, adns_query to, |
438 | void *block, size_t sz) { | |
551ff40f | 439 | allocnode *an; |
440 | ||
441 | if (!block) return; | |
442 | an= (void*)((byte*)block - MEM_ROUND(sizeof(*an))); | |
443 | ||
444 | assert(!to->final_allocspace); | |
445 | assert(!from->final_allocspace); | |
446 | ||
447 | LIST_UNLINK(from->allocations,an); | |
448 | LIST_LINK_TAIL(to->allocations,an); | |
449 | ||
3dbef075 | 450 | sz= MEM_ROUND(sz); |
551ff40f | 451 | from->interim_allocd -= sz; |
452 | to->interim_allocd += sz; | |
73dba56e | 453 | |
454 | if (to->expires > from->expires) to->expires= from->expires; | |
551ff40f | 455 | } |
456 | ||
e576be50 | 457 | void *adns__alloc_final(adns_query qu, size_t sz) { |
458 | /* When we're in the _final stage, we _subtract_ from interim_alloc'd | |
459 | * each allocation, and use final_allocspace to point to the next free | |
460 | * bit. | |
461 | */ | |
462 | void *rp; | |
463 | ||
464 | sz= MEM_ROUND(sz); | |
465 | rp= qu->final_allocspace; | |
466 | assert(rp); | |
467 | qu->interim_allocd -= sz; | |
468 | assert(qu->interim_allocd>=0); | |
469 | qu->final_allocspace= (byte*)rp + sz; | |
470 | return rp; | |
471 | } | |
472 | ||
9ec44266 | 473 | static void cancel_children(adns_query qu) { |
474 | adns_query cqu, ncqu; | |
475 | ||
476 | for (cqu= qu->children.head; cqu; cqu= ncqu) { | |
477 | ncqu= cqu->siblings.next; | |
478 | adns_cancel(cqu); | |
479 | } | |
9ec44266 | 480 | } |
481 | ||
8b3d55e3 | 482 | void adns__reset_preserved(adns_query qu) { |
9557e604 | 483 | assert(!qu->final_allocspace); |
9ec44266 | 484 | cancel_children(qu); |
e576be50 | 485 | qu->answer->nrrs= 0; |
71a6ff46 | 486 | qu->answer->rrs.untyped= 0; |
8b3d55e3 | 487 | qu->interim_allocd= qu->preserved_allocd; |
4353a5c4 | 488 | } |
489 | ||
88372443 | 490 | static void free_query_allocs(adns_query qu) { |
491 | allocnode *an, *ann; | |
88372443 | 492 | |
9ec44266 | 493 | cancel_children(qu); |
551ff40f | 494 | for (an= qu->allocations.head; an; an= ann) { ann= an->next; free(an); } |
bfc2c80e | 495 | LIST_INIT(qu->allocations); |
88372443 | 496 | adns__vbuf_free(&qu->vb); |
914a5ff5 | 497 | adns__vbuf_free(&qu->search_vb); |
eed63b97 | 498 | free(qu->query_dgram); |
d1cac7c0 | 499 | qu->query_dgram= 0; |
88372443 | 500 | } |
501 | ||
1dfe95d8 | 502 | void adns_cancel(adns_query qu) { |
3e2e5fab | 503 | adns_state ads; |
504 | ||
505 | ads= qu->ads; | |
28de6442 | 506 | adns__consistency(ads,qu,cc_entex); |
33ae0ddd | 507 | if (qu->parent) LIST_UNLINK_PART(qu->parent->children,qu,siblings.); |
88372443 | 508 | switch (qu->state) { |
f7f83b4a | 509 | case query_tosend: |
510 | LIST_UNLINK(ads->udpw,qu); | |
88372443 | 511 | break; |
f7f83b4a | 512 | case query_tcpw: |
513 | LIST_UNLINK(ads->tcpw,qu); | |
514 | break; | |
515 | case query_childw: | |
3e2e5fab | 516 | LIST_UNLINK(ads->childw,qu); |
88372443 | 517 | break; |
518 | case query_done: | |
3e2e5fab | 519 | LIST_UNLINK(ads->output,qu); |
88372443 | 520 | break; |
521 | default: | |
522 | abort(); | |
523 | } | |
524 | free_query_allocs(qu); | |
525 | free(qu->answer); | |
526 | free(qu); | |
28de6442 | 527 | adns__consistency(ads,0,cc_entex); |
88372443 | 528 | } |
551ff40f | 529 | |
609133ee | 530 | void adns__update_expires(adns_query qu, unsigned long ttl, |
531 | struct timeval now) { | |
73dba56e | 532 | time_t max; |
533 | ||
534 | assert(ttl <= MAXTTLBELIEVE); | |
535 | max= now.tv_sec + ttl; | |
536 | if (qu->expires < max) return; | |
537 | qu->expires= max; | |
538 | } | |
539 | ||
551ff40f | 540 | static void makefinal_query(adns_query qu) { |
98a3f706 | 541 | adns_answer *ans; |
88372443 | 542 | int rrn; |
8e5b0abb | 543 | |
88372443 | 544 | ans= qu->answer; |
551ff40f | 545 | |
88372443 | 546 | if (qu->interim_allocd) { |
609133ee | 547 | ans= realloc(qu->answer, |
548 | MEM_ROUND(MEM_ROUND(sizeof(*ans)) + qu->interim_allocd)); | |
551ff40f | 549 | if (!ans) goto x_nomem; |
e062dcae | 550 | qu->answer= ans; |
551 | } | |
8e5b0abb | 552 | |
88372443 | 553 | qu->final_allocspace= (byte*)ans + MEM_ROUND(sizeof(*ans)); |
8e5b0abb | 554 | adns__makefinal_str(qu,&ans->cname); |
22181a31 | 555 | adns__makefinal_str(qu,&ans->owner); |
88372443 | 556 | |
8e5b0abb | 557 | if (ans->nrrs) { |
88372443 | 558 | adns__makefinal_block(qu, &ans->rrs.untyped, ans->nrrs*ans->rrsz); |
8e5b0abb | 559 | |
88372443 | 560 | for (rrn=0; rrn<ans->nrrs; rrn++) |
561 | qu->typei->makefinal(qu, ans->rrs.bytes + rrn*ans->rrsz); | |
88372443 | 562 | } |
73dba56e | 563 | |
88372443 | 564 | free_query_allocs(qu); |
551ff40f | 565 | return; |
8e5b0abb | 566 | |
551ff40f | 567 | x_nomem: |
8b3d55e3 | 568 | qu->preserved_allocd= 0; |
551ff40f | 569 | qu->answer->cname= 0; |
8b3d55e3 | 570 | qu->answer->owner= 0; |
571 | adns__reset_preserved(qu); /* (but we just threw away the preserved stuff) */ | |
572 | ||
573 | qu->answer->status= adns_s_nomemory; | |
551ff40f | 574 | free_query_allocs(qu); |
575 | } | |
576 | ||
577 | void adns__query_done(adns_query qu) { | |
578 | adns_answer *ans; | |
579 | adns_query parent; | |
580 | ||
4218fb9a | 581 | cancel_children(qu); |
582 | ||
4353a5c4 | 583 | qu->id= -1; |
551ff40f | 584 | ans= qu->answer; |
585 | ||
ac015392 | 586 | if (qu->flags & adns_qf_search && ans->status != adns_s_nomemory) { |
22181a31 | 587 | if (!save_owner(qu, qu->search_vb.buf, qu->search_vb.used)) { |
588 | adns__query_fail(qu,adns_s_nomemory); | |
589 | return; | |
590 | } | |
591 | } | |
592 | ||
551ff40f | 593 | if (ans->nrrs && qu->typei->diff_needswap) { |
594 | if (!adns__vbuf_ensure(&qu->vb,qu->typei->rrsz)) { | |
ea1e31e3 | 595 | adns__query_fail(qu,adns_s_nomemory); |
551ff40f | 596 | return; |
597 | } | |
598 | adns__isort(ans->rrs.bytes, ans->nrrs, ans->rrsz, | |
09957b1c | 599 | qu->vb.buf, |
609133ee | 600 | (int(*)(void*, const void*, const void*)) |
601 | qu->typei->diff_needswap, | |
09957b1c | 602 | qu->ads); |
551ff40f | 603 | } |
d24e2a7e | 604 | if (ans->nrrs && qu->typei->postsort) { |
605 | qu->typei->postsort(qu->ads, ans->rrs.bytes, ans->nrrs, qu->typei); | |
606 | } | |
e553d072 | 607 | |
73dba56e | 608 | ans->expires= qu->expires; |
551ff40f | 609 | parent= qu->parent; |
610 | if (parent) { | |
611 | LIST_UNLINK_PART(parent->children,qu,siblings.); | |
4218fb9a | 612 | LIST_UNLINK(qu->ads->childw,parent); |
a6536d8b | 613 | qu->ctx.callback(parent,qu); |
551ff40f | 614 | free_query_allocs(qu); |
eed63b97 | 615 | free(qu->answer); |
551ff40f | 616 | free(qu); |
551ff40f | 617 | } else { |
618 | makefinal_query(qu); | |
619 | LIST_LINK_TAIL(qu->ads->output,qu); | |
33ae0ddd | 620 | qu->state= query_done; |
551ff40f | 621 | } |
656b2da9 | 622 | } |
623 | ||
3955725c | 624 | void adns__query_fail(adns_query qu, adns_status stat) { |
8b3d55e3 | 625 | adns__reset_preserved(qu); |
8e5b0abb | 626 | qu->answer->status= stat; |
3955725c | 627 | adns__query_done(qu); |
656b2da9 | 628 | } |
e576be50 | 629 | |
630 | void adns__makefinal_str(adns_query qu, char **strp) { | |
631 | int l; | |
632 | char *before, *after; | |
633 | ||
634 | before= *strp; | |
9557e604 | 635 | if (!before) return; |
e576be50 | 636 | l= strlen(before)+1; |
637 | after= adns__alloc_final(qu,l); | |
638 | memcpy(after,before,l); | |
639 | *strp= after; | |
640 | } | |
641 | ||
3955725c | 642 | void adns__makefinal_block(adns_query qu, void **blpp, size_t sz) { |
9557e604 | 643 | void *before, *after; |
e576be50 | 644 | |
9557e604 | 645 | before= *blpp; |
646 | if (!before) return; | |
e576be50 | 647 | after= adns__alloc_final(qu,sz); |
9557e604 | 648 | memcpy(after,before,sz); |
e576be50 | 649 | *blpp= after; |
650 | } |