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 | |
7f8bbe29 | 16 | * the Free Software Foundation; either version 3, or (at your option) |
e576be50 | 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 | |
8c09a4c6 | 25 | * along with this program; if not, write to the Free Software Foundation. |
e576be50 | 26 | */ |
4353a5c4 | 27 | |
4bec51a4 | 28 | #include "internal.h" |
656b2da9 | 29 | |
e576be50 | 30 | #include <stdlib.h> |
31 | #include <unistd.h> | |
32 | #include <errno.h> | |
656b2da9 | 33 | |
e576be50 | 34 | #include <sys/time.h> |
656b2da9 | 35 | |
e576be50 | 36 | #include "internal.h" |
ddfda861 | 37 | |
2c6eb096 | 38 | static adns_query query_alloc(adns_state ads, |
39 | const typeinfo *typei, adns_rrtype type, | |
660d7d3b | 40 | adns_queryflags flags, struct timeval now) { |
41 | /* Allocate a virgin query and return it. */ | |
e576be50 | 42 | adns_query qu; |
660d7d3b | 43 | |
44 | qu= malloc(sizeof(*qu)); if (!qu) return 0; | |
609133ee | 45 | qu->answer= malloc(sizeof(*qu->answer)); |
46 | if (!qu->answer) { free(qu); return 0; } | |
660d7d3b | 47 | |
3955725c | 48 | qu->ads= ads; |
d8c062fa | 49 | qu->state= query_tosend; |
e576be50 | 50 | qu->back= qu->next= qu->parent= 0; |
51 | LIST_INIT(qu->children); | |
660d7d3b | 52 | LINK_INIT(qu->siblings); |
551ff40f | 53 | LIST_INIT(qu->allocations); |
e576be50 | 54 | qu->interim_allocd= 0; |
8b3d55e3 | 55 | qu->preserved_allocd= 0; |
3955725c | 56 | qu->final_allocspace= 0; |
e576be50 | 57 | |
3955725c | 58 | qu->typei= typei; |
660d7d3b | 59 | qu->query_dgram= 0; |
60 | qu->query_dglen= 0; | |
e576be50 | 61 | adns__vbuf_init(&qu->vb); |
62 | ||
63 | qu->cname_dgram= 0; | |
64 | qu->cname_dglen= qu->cname_begin= 0; | |
660d7d3b | 65 | |
66 | adns__vbuf_init(&qu->search_vb); | |
67 | qu->search_origlen= qu->search_pos= qu->search_doneabs= 0; | |
68 | ||
4fad263d | 69 | qu->id= -2; /* will be overwritten with real id before we leave adns */ |
e576be50 | 70 | qu->flags= flags; |
f7f83b4a | 71 | qu->retries= 0; |
e576be50 | 72 | qu->udpnextserver= 0; |
f7f83b4a | 73 | qu->udpsent= 0; |
e576be50 | 74 | timerclear(&qu->timeout); |
73dba56e | 75 | qu->expires= now.tv_sec + MAXTTLBELIEVE; |
e576be50 | 76 | |
660d7d3b | 77 | memset(&qu->ctx,0,sizeof(qu->ctx)); |
78 | ||
e576be50 | 79 | qu->answer->status= adns_s_ok; |
22181a31 | 80 | qu->answer->cname= qu->answer->owner= 0; |
2c6eb096 | 81 | qu->answer->type= type; |
660d7d3b | 82 | qu->answer->expires= -1; |
e576be50 | 83 | qu->answer->nrrs= 0; |
71a6ff46 | 84 | qu->answer->rrs.untyped= 0; |
042b0909 | 85 | qu->answer->rrsz= typei->getrrsz(typei,type); |
ddfda861 | 86 | |
660d7d3b | 87 | return qu; |
88 | } | |
89 | ||
90 | static void query_submit(adns_state ads, adns_query qu, | |
91 | const typeinfo *typei, vbuf *qumsg_vb, int id, | |
92 | adns_queryflags flags, struct timeval now) { | |
93 | /* Fills in the query message in for a previously-allocated query, | |
914a5ff5 | 94 | * and submits it. Cannot fail. Takes over the memory for qumsg_vb. |
660d7d3b | 95 | */ |
96 | ||
e576be50 | 97 | qu->vb= *qumsg_vb; |
98 | adns__vbuf_init(qumsg_vb); | |
660d7d3b | 99 | |
100 | qu->query_dgram= malloc(qu->vb.used); | |
101 | if (!qu->query_dgram) { adns__query_fail(qu,adns_s_nomemory); return; } | |
102 | ||
103 | qu->id= id; | |
104 | qu->query_dglen= qu->vb.used; | |
105 | memcpy(qu->query_dgram,qu->vb.buf,qu->vb.used); | |
13826233 MW |
106 | |
107 | typei->query_send(qu,now); | |
660d7d3b | 108 | } |
109 | ||
e8e5aeac MW |
110 | adns_status adns__ckl_hostname(adns_state ads, adns_queryflags flags, |
111 | union checklabel_state *cls, | |
112 | qcontext *ctx, int labnum, | |
0b062ecc | 113 | const char *dgram, int labstart, int lablen) |
e8e5aeac MW |
114 | { |
115 | int i, c; | |
0b062ecc | 116 | const char *label = dgram+labstart; |
e8e5aeac MW |
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; | |
11c4794c | 135 | adns_status st; |
e8e5aeac MW |
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 { | |
11c4794c IJ |
141 | st= adns__findlabel_next(&fls, &lablen,&labstart); |
142 | assert(!st); assert(lablen >= 0); | |
143 | st= typei->checklabel(ads,flags, &cls,ctx, | |
0b062ecc | 144 | labnum++, dgram,labstart,lablen); |
11c4794c | 145 | if (st) return st; |
e8e5aeac MW |
146 | } while (lablen); |
147 | return adns_s_ok; | |
148 | } | |
149 | ||
660d7d3b | 150 | adns_status adns__internal_submit(adns_state ads, adns_query *query_r, |
07c3d3e2 | 151 | adns_query parent, |
7f593711 MW |
152 | const typeinfo *typei, adns_rrtype type, |
153 | vbuf *qumsg_vb, int id, | |
660d7d3b | 154 | adns_queryflags flags, struct timeval now, |
be4d66dc | 155 | qcontext *ctx) { |
660d7d3b | 156 | adns_query qu; |
11c4794c | 157 | adns_status st; |
660d7d3b | 158 | |
11c4794c IJ |
159 | st= check_domain_name(ads, flags,ctx,typei, qumsg_vb->buf,qumsg_vb->used); |
160 | if (st) goto x_err; | |
7f593711 | 161 | qu= query_alloc(ads,typei,type,flags,now); |
11c4794c | 162 | if (!qu) { st = adns_s_nomemory; goto x_err; } |
660d7d3b | 163 | *query_r= qu; |
e576be50 | 164 | |
07c3d3e2 IJ |
165 | qu->parent= parent; |
166 | LIST_LINK_TAIL_PART(parent->children,qu,siblings.); | |
660d7d3b | 167 | memcpy(&qu->ctx,ctx,sizeof(qu->ctx)); |
168 | query_submit(ads,qu, typei,qumsg_vb,id,flags,now); | |
169 | ||
3955725c | 170 | return adns_s_ok; |
e8e5aeac MW |
171 | |
172 | x_err: | |
173 | adns__vbuf_free(qumsg_vb); | |
11c4794c | 174 | return st; |
660d7d3b | 175 | } |
176 | ||
177 | static void query_simple(adns_state ads, adns_query qu, | |
178 | const char *owner, int ol, | |
179 | const typeinfo *typei, adns_queryflags flags, | |
180 | struct timeval now) { | |
149dd923 | 181 | vbuf vb_new; |
660d7d3b | 182 | int id; |
6b7c4ef0 | 183 | adns_status st; |
e576be50 | 184 | |
6b7c4ef0 | 185 | st= adns__mkquery(ads,&qu->vb,&id, owner,ol, |
2c6eb096 | 186 | typei,qu->answer->type, flags); |
6b7c4ef0 IJ |
187 | if (st) { |
188 | if (st == adns_s_querydomaintoolong && (flags & adns_qf_search)) { | |
149dd923 | 189 | adns__search_next(ads,qu,now); |
190 | return; | |
191 | } else { | |
6b7c4ef0 | 192 | adns__query_fail(qu,st); |
149dd923 | 193 | return; |
194 | } | |
195 | } | |
196 | ||
6b7c4ef0 IJ |
197 | st= check_domain_name(ads, flags,&qu->ctx,typei, qu->vb.buf,qu->vb.used); |
198 | if (st) { adns__query_fail(qu,st); return; } | |
e8e5aeac | 199 | |
149dd923 | 200 | vb_new= qu->vb; |
201 | adns__vbuf_init(&qu->vb); | |
202 | query_submit(ads,qu, typei,&vb_new,id, flags,now); | |
660d7d3b | 203 | } |
204 | ||
205 | void adns__search_next(adns_state ads, adns_query qu, struct timeval now) { | |
206 | const char *nextentry; | |
6b7c4ef0 | 207 | adns_status st; |
660d7d3b | 208 | |
209 | if (qu->search_doneabs<0) { | |
210 | nextentry= 0; | |
211 | qu->search_doneabs= 1; | |
212 | } else { | |
213 | if (qu->search_pos >= ads->nsearchlist) { | |
214 | if (qu->search_doneabs) { | |
ac015392 | 215 | qu->search_vb.used= qu->search_origlen; |
6b7c4ef0 | 216 | st= adns_s_nxdomain; goto x_fail; |
660d7d3b | 217 | } else { |
218 | nextentry= 0; | |
219 | qu->search_doneabs= 1; | |
220 | } | |
221 | } else { | |
222 | nextentry= ads->searchlist[qu->search_pos++]; | |
223 | } | |
224 | } | |
225 | ||
e2632eb9 | 226 | qu->search_vb.used= qu->search_origlen; |
660d7d3b | 227 | if (nextentry) { |
228 | if (!adns__vbuf_append(&qu->search_vb,".",1) || | |
ac015392 | 229 | !adns__vbuf_appendstr(&qu->search_vb,nextentry)) |
230 | goto x_nomemory; | |
660d7d3b | 231 | } |
232 | ||
233 | free(qu->query_dgram); | |
234 | qu->query_dgram= 0; qu->query_dglen= 0; | |
235 | ||
609133ee | 236 | query_simple(ads,qu, qu->search_vb.buf, qu->search_vb.used, |
237 | qu->typei, qu->flags, now); | |
660d7d3b | 238 | return; |
ac015392 | 239 | |
240 | x_nomemory: | |
6b7c4ef0 | 241 | st= adns_s_nomemory; |
660d7d3b | 242 | x_fail: |
6b7c4ef0 | 243 | adns__query_fail(qu,st); |
4bec51a4 | 244 | } |
245 | ||
22181a31 | 246 | static int save_owner(adns_query qu, const char *owner, int ol) { |
247 | /* Returns 1 if OK, otherwise there was no memory. */ | |
248 | adns_answer *ans; | |
249 | ||
ac015392 | 250 | if (!(qu->flags & adns_qf_owner)) return 1; |
251 | ||
22181a31 | 252 | ans= qu->answer; |
253 | assert(!ans->owner); | |
254 | ||
8b3d55e3 | 255 | ans->owner= adns__alloc_preserved(qu,ol+1); if (!ans->owner) return 0; |
22181a31 | 256 | |
257 | memcpy(ans->owner,owner,ol); | |
258 | ans->owner[ol]= 0; | |
259 | return 1; | |
260 | } | |
261 | ||
e576be50 | 262 | int adns_submit(adns_state ads, |
263 | const char *owner, | |
264 | adns_rrtype type, | |
e563872a | 265 | adns_queryflags flags, |
e576be50 | 266 | void *context, |
267 | adns_query *query_r) { | |
660d7d3b | 268 | int r, ol, ndots; |
6b7c4ef0 | 269 | adns_status st; |
3955725c | 270 | const typeinfo *typei; |
271 | struct timeval now; | |
660d7d3b | 272 | adns_query qu; |
273 | const char *p; | |
e576be50 | 274 | |
28de6442 | 275 | adns__consistency(ads,0,cc_entex); |
3e2e5fab | 276 | |
3955725c | 277 | typei= adns__findtype(type); |
636b69b1 | 278 | if (!typei) return ENOSYS; |
e576be50 | 279 | |
660d7d3b | 280 | r= gettimeofday(&now,0); if (r) goto x_errno; |
2c6eb096 | 281 | qu= query_alloc(ads,typei,type,flags,now); if (!qu) goto x_errno; |
660d7d3b | 282 | |
283 | qu->ctx.ext= context; | |
284 | qu->ctx.callback= 0; | |
0ea82d76 MW |
285 | memset(&qu->ctx.pinfo,0,sizeof(qu->ctx.pinfo)); |
286 | memset(&qu->ctx.tinfo,0,sizeof(qu->ctx.tinfo)); | |
e576be50 | 287 | |
e2632eb9 | 288 | *query_r= qu; |
289 | ||
e576be50 | 290 | ol= strlen(owner); |
6b7c4ef0 IJ |
291 | if (!ol) { st= adns_s_querydomaininvalid; goto x_adnsfail; } |
292 | if (ol>DNS_MAXDOMAIN+1) { st= adns_s_querydomaintoolong; goto x_adnsfail; } | |
e576be50 | 293 | |
e9e53c73 | 294 | if (ol>=1 && owner[ol-1]=='.' && (ol<2 || owner[ol-2]!='\\')) { |
295 | flags &= ~adns_qf_search; | |
3d1ae6ea | 296 | qu->flags= flags; |
e9e53c73 | 297 | ol--; |
298 | } | |
e576be50 | 299 | |
660d7d3b | 300 | if (flags & adns_qf_search) { |
301 | r= adns__vbuf_append(&qu->search_vb,owner,ol); | |
6b7c4ef0 | 302 | if (!r) { st= adns_s_nomemory; goto x_adnsfail; } |
660d7d3b | 303 | |
304 | for (ndots=0, p=owner; (p= strchr(p,'.')); p++, ndots++); | |
305 | qu->search_doneabs= (ndots >= ads->searchndots) ? -1 : 0; | |
660d7d3b | 306 | qu->search_origlen= ol; |
660d7d3b | 307 | adns__search_next(ads,qu,now); |
e2632eb9 | 308 | } else { |
22181a31 | 309 | if (flags & adns_qf_owner) { |
6b7c4ef0 | 310 | if (!save_owner(qu,owner,ol)) { st= adns_s_nomemory; goto x_adnsfail; } |
22181a31 | 311 | } |
e2632eb9 | 312 | query_simple(ads,qu, owner,ol, typei,flags, now); |
660d7d3b | 313 | } |
70ad7a2a | 314 | adns__autosys(ads,now); |
eb2a930e | 315 | adns__returning(ads,qu); |
660d7d3b | 316 | return 0; |
317 | ||
318 | x_adnsfail: | |
6b7c4ef0 | 319 | adns__query_fail(qu,st); |
eb2a930e | 320 | adns__returning(ads,qu); |
660d7d3b | 321 | return 0; |
322 | ||
323 | x_errno: | |
324 | r= errno; | |
325 | assert(r); | |
eb2a930e | 326 | adns__returning(ads,0); |
660d7d3b | 327 | return r; |
ddfda861 | 328 | } |
329 | ||
2b1c6979 | 330 | int adns_submit_reverse_any(adns_state ads, |
331 | const struct sockaddr *addr, | |
332 | const char *zone, | |
333 | adns_rrtype type, | |
334 | adns_queryflags flags, | |
335 | void *context, | |
336 | adns_query *query_r) { | |
51cb3de3 | 337 | char *buf, *buf_free = 0; |
2b1c6979 | 338 | char shortbuf[100]; |
51cb3de3 | 339 | int r; |
d7449548 | 340 | |
d7449548 | 341 | flags &= ~adns_qf_search; |
342 | ||
51cb3de3 MW |
343 | buf = shortbuf; |
344 | r= adns__make_reverse_domain(addr,zone, &buf,sizeof(shortbuf),&buf_free); | |
345 | if (r) return r; | |
2b1c6979 | 346 | r= adns_submit(ads,buf,type,flags,context,query_r); |
347 | free(buf_free); | |
348 | return r; | |
349 | } | |
350 | ||
351 | int adns_submit_reverse(adns_state ads, | |
352 | const struct sockaddr *addr, | |
353 | adns_rrtype type, | |
354 | adns_queryflags flags, | |
355 | void *context, | |
356 | adns_query *query_r) { | |
d24b603f MW |
357 | if (((type^adns_r_ptr) & adns_rrt_reprmask) && |
358 | ((type^adns_r_ptr_raw) & adns_rrt_reprmask)) | |
359 | return EINVAL; | |
51cb3de3 | 360 | return adns_submit_reverse_any(ads,addr,0,type,flags,context,query_r); |
d7449548 | 361 | } |
362 | ||
e576be50 | 363 | int adns_synchronous(adns_state ads, |
364 | const char *owner, | |
365 | adns_rrtype type, | |
e563872a | 366 | adns_queryflags flags, |
e576be50 | 367 | adns_answer **answer_r) { |
368 | adns_query qu; | |
369 | int r; | |
370 | ||
371 | r= adns_submit(ads,owner,type,flags,0,&qu); | |
372 | if (r) return r; | |
4bec51a4 | 373 | |
88372443 | 374 | r= adns_wait(ads,&qu,answer_r,0); |
3955725c | 375 | if (r) adns_cancel(qu); |
ddfda861 | 376 | |
88372443 | 377 | return r; |
e576be50 | 378 | } |
379 | ||
f759e52e | 380 | static void *alloc_common(adns_query qu, size_t sz) { |
e576be50 | 381 | allocnode *an; |
382 | ||
a49a6d7b | 383 | if (!sz) return qu; /* Any old pointer will do */ |
e576be50 | 384 | assert(!qu->final_allocspace); |
e576be50 | 385 | an= malloc(MEM_ROUND(MEM_ROUND(sizeof(*an)) + sz)); |
e062dcae | 386 | if (!an) return 0; |
551ff40f | 387 | LIST_LINK_TAIL(qu->allocations,an); |
2edb1757 | 388 | an->sz= sz; |
e576be50 | 389 | return (byte*)an + MEM_ROUND(sizeof(*an)); |
390 | } | |
4bec51a4 | 391 | |
f759e52e | 392 | void *adns__alloc_interim(adns_query qu, size_t sz) { |
8b3d55e3 | 393 | void *rv; |
394 | ||
f759e52e | 395 | sz= MEM_ROUND(sz); |
8b3d55e3 | 396 | rv= alloc_common(qu,sz); |
397 | if (!rv) return 0; | |
f759e52e | 398 | qu->interim_allocd += sz; |
8b3d55e3 | 399 | return rv; |
400 | } | |
401 | ||
402 | void *adns__alloc_preserved(adns_query qu, size_t sz) { | |
403 | void *rv; | |
404 | ||
405 | sz= MEM_ROUND(sz); | |
406 | rv= adns__alloc_interim(qu,sz); | |
407 | if (!rv) return 0; | |
408 | qu->preserved_allocd += sz; | |
409 | return rv; | |
f759e52e | 410 | } |
411 | ||
3034e24e | 412 | static allocnode *alloc__info(adns_query qu, void *p, size_t *sz_r) { |
2edb1757 MW |
413 | allocnode *an; |
414 | ||
415 | if (!p || p == qu) { *sz_r= 0; return 0; } | |
416 | an= (allocnode *)((byte *)p - MEM_ROUND(sizeof(allocnode))); | |
417 | *sz_r= MEM_ROUND(an->sz); | |
418 | return an; | |
419 | } | |
420 | ||
4c6fd94d MW |
421 | void adns__free_interim(adns_query qu, void *p) { |
422 | size_t sz; | |
3034e24e | 423 | allocnode *an= alloc__info(qu, p, &sz); |
4c6fd94d MW |
424 | |
425 | if (!an) return; | |
426 | assert(!qu->final_allocspace); | |
427 | LIST_UNLINK(qu->allocations, an); | |
428 | free(an); | |
429 | qu->interim_allocd -= sz; | |
1a80d99b | 430 | assert(!qu->interim_allocd >= 0); |
4c6fd94d MW |
431 | } |
432 | ||
f759e52e | 433 | void *adns__alloc_mine(adns_query qu, size_t sz) { |
434 | return alloc_common(qu,MEM_ROUND(sz)); | |
435 | } | |
436 | ||
2edb1757 MW |
437 | void adns__transfer_interim(adns_query from, adns_query to, void *block) { |
438 | size_t sz; | |
3034e24e | 439 | allocnode *an= alloc__info(from, block, &sz); |
551ff40f | 440 | |
2edb1757 | 441 | if (!an) return; |
551ff40f | 442 | |
443 | assert(!to->final_allocspace); | |
444 | assert(!from->final_allocspace); | |
445 | ||
446 | LIST_UNLINK(from->allocations,an); | |
447 | LIST_LINK_TAIL(to->allocations,an); | |
448 | ||
449 | from->interim_allocd -= sz; | |
450 | to->interim_allocd += sz; | |
73dba56e | 451 | |
452 | if (to->expires > from->expires) to->expires= from->expires; | |
551ff40f | 453 | } |
454 | ||
e576be50 | 455 | void *adns__alloc_final(adns_query qu, size_t sz) { |
456 | /* When we're in the _final stage, we _subtract_ from interim_alloc'd | |
457 | * each allocation, and use final_allocspace to point to the next free | |
458 | * bit. | |
459 | */ | |
460 | void *rp; | |
461 | ||
462 | sz= MEM_ROUND(sz); | |
463 | rp= qu->final_allocspace; | |
464 | assert(rp); | |
465 | qu->interim_allocd -= sz; | |
466 | assert(qu->interim_allocd>=0); | |
467 | qu->final_allocspace= (byte*)rp + sz; | |
468 | return rp; | |
469 | } | |
470 | ||
02887325 | 471 | void adns__cancel_children(adns_query qu) { |
9ec44266 | 472 | adns_query cqu, ncqu; |
473 | ||
474 | for (cqu= qu->children.head; cqu; cqu= ncqu) { | |
475 | ncqu= cqu->siblings.next; | |
64aae7c8 | 476 | adns__cancel(cqu); |
9ec44266 | 477 | } |
9ec44266 | 478 | } |
479 | ||
8b3d55e3 | 480 | void adns__reset_preserved(adns_query qu) { |
9557e604 | 481 | assert(!qu->final_allocspace); |
02887325 | 482 | adns__cancel_children(qu); |
e576be50 | 483 | qu->answer->nrrs= 0; |
71a6ff46 | 484 | qu->answer->rrs.untyped= 0; |
8b3d55e3 | 485 | qu->interim_allocd= qu->preserved_allocd; |
4353a5c4 | 486 | } |
487 | ||
88372443 | 488 | static void free_query_allocs(adns_query qu) { |
489 | allocnode *an, *ann; | |
88372443 | 490 | |
02887325 | 491 | adns__cancel_children(qu); |
551ff40f | 492 | for (an= qu->allocations.head; an; an= ann) { ann= an->next; free(an); } |
bfc2c80e | 493 | LIST_INIT(qu->allocations); |
88372443 | 494 | adns__vbuf_free(&qu->vb); |
914a5ff5 | 495 | adns__vbuf_free(&qu->search_vb); |
eed63b97 | 496 | free(qu->query_dgram); |
d1cac7c0 | 497 | qu->query_dgram= 0; |
88372443 | 498 | } |
499 | ||
eb2a930e | 500 | void adns__returning(adns_state ads, adns_query qu_for_caller) { |
b582ca0f IJ |
501 | while (ads->intdone.head) { |
502 | adns_query iq= ads->intdone.head; | |
503 | adns_query parent= iq->parent; | |
504 | LIST_UNLINK_PART(parent->children,iq,siblings.); | |
505 | LIST_UNLINK(iq->ads->childw,parent); | |
506 | LIST_UNLINK(ads->intdone,iq); | |
507 | iq->ctx.callback(parent,iq); | |
508 | free_query_allocs(iq); | |
509 | free(iq->answer); | |
510 | free(iq); | |
511 | } | |
eb2a930e IJ |
512 | adns__consistency(ads,qu_for_caller,cc_entex); |
513 | } | |
514 | ||
64aae7c8 | 515 | void adns__cancel(adns_query qu) { |
3e2e5fab | 516 | adns_state ads; |
517 | ||
518 | ads= qu->ads; | |
64aae7c8 | 519 | adns__consistency(ads,qu,cc_freq); |
33ae0ddd | 520 | if (qu->parent) LIST_UNLINK_PART(qu->parent->children,qu,siblings.); |
88372443 | 521 | switch (qu->state) { |
f7f83b4a | 522 | case query_tosend: |
523 | LIST_UNLINK(ads->udpw,qu); | |
88372443 | 524 | break; |
f7f83b4a | 525 | case query_tcpw: |
526 | LIST_UNLINK(ads->tcpw,qu); | |
527 | break; | |
528 | case query_childw: | |
3e2e5fab | 529 | LIST_UNLINK(ads->childw,qu); |
88372443 | 530 | break; |
531 | case query_done: | |
b582ca0f IJ |
532 | if (qu->parent) |
533 | LIST_UNLINK(ads->intdone,qu); | |
534 | else | |
535 | LIST_UNLINK(ads->output,qu); | |
88372443 | 536 | break; |
537 | default: | |
538 | abort(); | |
539 | } | |
540 | free_query_allocs(qu); | |
541 | free(qu->answer); | |
542 | free(qu); | |
64aae7c8 IJ |
543 | } |
544 | ||
545 | void adns_cancel(adns_query qu) { | |
546 | adns_state ads; | |
547 | ||
548 | assert(!qu->parent); | |
549 | ads= qu->ads; | |
550 | adns__consistency(ads,qu,cc_entex); | |
551 | adns__cancel(qu); | |
eb2a930e | 552 | adns__returning(ads,0); |
88372443 | 553 | } |
551ff40f | 554 | |
609133ee | 555 | void adns__update_expires(adns_query qu, unsigned long ttl, |
556 | struct timeval now) { | |
73dba56e | 557 | time_t max; |
558 | ||
559 | assert(ttl <= MAXTTLBELIEVE); | |
560 | max= now.tv_sec + ttl; | |
561 | if (qu->expires < max) return; | |
562 | qu->expires= max; | |
563 | } | |
564 | ||
551ff40f | 565 | static void makefinal_query(adns_query qu) { |
98a3f706 | 566 | adns_answer *ans; |
88372443 | 567 | int rrn; |
8e5b0abb | 568 | |
88372443 | 569 | ans= qu->answer; |
551ff40f | 570 | |
88372443 | 571 | if (qu->interim_allocd) { |
609133ee | 572 | ans= realloc(qu->answer, |
573 | MEM_ROUND(MEM_ROUND(sizeof(*ans)) + qu->interim_allocd)); | |
551ff40f | 574 | if (!ans) goto x_nomem; |
e062dcae | 575 | qu->answer= ans; |
576 | } | |
8e5b0abb | 577 | |
88372443 | 578 | qu->final_allocspace= (byte*)ans + MEM_ROUND(sizeof(*ans)); |
8e5b0abb | 579 | adns__makefinal_str(qu,&ans->cname); |
22181a31 | 580 | adns__makefinal_str(qu,&ans->owner); |
88372443 | 581 | |
8e5b0abb | 582 | if (ans->nrrs) { |
88372443 | 583 | adns__makefinal_block(qu, &ans->rrs.untyped, ans->nrrs*ans->rrsz); |
8e5b0abb | 584 | |
88372443 | 585 | for (rrn=0; rrn<ans->nrrs; rrn++) |
586 | qu->typei->makefinal(qu, ans->rrs.bytes + rrn*ans->rrsz); | |
88372443 | 587 | } |
73dba56e | 588 | |
88372443 | 589 | free_query_allocs(qu); |
551ff40f | 590 | return; |
8e5b0abb | 591 | |
551ff40f | 592 | x_nomem: |
8b3d55e3 | 593 | qu->preserved_allocd= 0; |
551ff40f | 594 | qu->answer->cname= 0; |
8b3d55e3 | 595 | qu->answer->owner= 0; |
596 | adns__reset_preserved(qu); /* (but we just threw away the preserved stuff) */ | |
597 | ||
598 | qu->answer->status= adns_s_nomemory; | |
551ff40f | 599 | free_query_allocs(qu); |
600 | } | |
601 | ||
602 | void adns__query_done(adns_query qu) { | |
b582ca0f | 603 | adns_state ads=qu->ads; |
551ff40f | 604 | adns_answer *ans; |
551ff40f | 605 | |
02887325 | 606 | adns__cancel_children(qu); |
4218fb9a | 607 | |
4353a5c4 | 608 | qu->id= -1; |
551ff40f | 609 | ans= qu->answer; |
610 | ||
ac015392 | 611 | if (qu->flags & adns_qf_search && ans->status != adns_s_nomemory) { |
22181a31 | 612 | if (!save_owner(qu, qu->search_vb.buf, qu->search_vb.used)) { |
613 | adns__query_fail(qu,adns_s_nomemory); | |
614 | return; | |
615 | } | |
616 | } | |
617 | ||
551ff40f | 618 | if (ans->nrrs && qu->typei->diff_needswap) { |
042b0909 | 619 | if (!adns__vbuf_ensure(&qu->vb,qu->answer->rrsz)) { |
ea1e31e3 | 620 | adns__query_fail(qu,adns_s_nomemory); |
551ff40f | 621 | return; |
622 | } | |
623 | adns__isort(ans->rrs.bytes, ans->nrrs, ans->rrsz, | |
09957b1c | 624 | qu->vb.buf, |
609133ee | 625 | (int(*)(void*, const void*, const void*)) |
626 | qu->typei->diff_needswap, | |
09957b1c | 627 | qu->ads); |
551ff40f | 628 | } |
d24e2a7e | 629 | if (ans->nrrs && qu->typei->postsort) { |
042b0909 MW |
630 | qu->typei->postsort(qu->ads, ans->rrs.bytes, |
631 | ans->nrrs,ans->rrsz, qu->typei); | |
d24e2a7e | 632 | } |
e553d072 | 633 | |
73dba56e | 634 | ans->expires= qu->expires; |
b582ca0f IJ |
635 | qu->state= query_done; |
636 | if (qu->parent) { | |
637 | LIST_LINK_TAIL(ads->intdone,qu); | |
551ff40f | 638 | } else { |
639 | makefinal_query(qu); | |
640 | LIST_LINK_TAIL(qu->ads->output,qu); | |
641 | } | |
656b2da9 | 642 | } |
643 | ||
6b7c4ef0 | 644 | void adns__query_fail(adns_query qu, adns_status st) { |
8b3d55e3 | 645 | adns__reset_preserved(qu); |
6b7c4ef0 | 646 | qu->answer->status= st; |
3955725c | 647 | adns__query_done(qu); |
656b2da9 | 648 | } |
e576be50 | 649 | |
650 | void adns__makefinal_str(adns_query qu, char **strp) { | |
651 | int l; | |
652 | char *before, *after; | |
653 | ||
654 | before= *strp; | |
9557e604 | 655 | if (!before) return; |
e576be50 | 656 | l= strlen(before)+1; |
657 | after= adns__alloc_final(qu,l); | |
658 | memcpy(after,before,l); | |
659 | *strp= after; | |
660 | } | |
661 | ||
3955725c | 662 | void adns__makefinal_block(adns_query qu, void **blpp, size_t sz) { |
9557e604 | 663 | void *before, *after; |
e576be50 | 664 | |
9557e604 | 665 | before= *blpp; |
666 | if (!before) return; | |
e576be50 | 667 | after= adns__alloc_final(qu,sz); |
9557e604 | 668 | memcpy(after,before,sz); |
e576be50 | 669 | *blpp= after; |
670 | } |