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 | ||
3540caec MW |
112 | adns_status adns__ckl_hostname(adns_state ads, adns_queryflags flags, |
113 | union checklabel_state *css, | |
114 | qcontext *ctx, int labnum, | |
115 | const char *label, int lablen) | |
116 | { | |
117 | int i, c; | |
118 | ||
119 | if (flags & adns_qf_quoteok_query) return adns_s_ok; | |
120 | for (i=0; i<lablen; i++) { | |
121 | c= label[i]; | |
122 | if (c == '-') { | |
123 | if (!i) return adns_s_querydomaininvalid; | |
124 | } else if (!ctype_alpha(c) && !ctype_digit(c)) { | |
125 | return adns_s_querydomaininvalid; | |
126 | } | |
127 | } | |
128 | return adns_s_ok; | |
129 | } | |
130 | ||
131 | static adns_status check_domain_name(adns_state ads, adns_queryflags flags, | |
132 | qcontext *ctx, const typeinfo *typei, | |
133 | const byte *dgram, int dglen) | |
134 | { | |
135 | findlabel_state fls; | |
136 | adns_status err; | |
137 | int labnum= 0, labstart, lablen; | |
138 | union checklabel_state css; | |
139 | ||
140 | adns__findlabel_start(&fls,ads, -1,0, dgram,dglen,dglen, DNS_HDRSIZE,0); | |
141 | do { | |
142 | err= adns__findlabel_next(&fls, &lablen,&labstart); | |
143 | assert(!err); assert(lablen >= 0); | |
144 | err= typei->checklabel(ads,flags, &css,ctx, | |
145 | labnum++, dgram+labstart,lablen); | |
146 | if (err) return err; | |
147 | } while (lablen); | |
148 | return adns_s_ok; | |
149 | } | |
150 | ||
7e6a84a1 | 151 | adns_status adns__internal_submit(adns_state ads, adns_query *query_r, |
5f8085b7 MW |
152 | const typeinfo *typei, adns_rrtype type, |
153 | vbuf *qumsg_vb, int id, | |
7e6a84a1 | 154 | adns_queryflags flags, struct timeval now, |
3540caec | 155 | qcontext *ctx) { |
7e6a84a1 | 156 | adns_query qu; |
3540caec | 157 | adns_status err; |
7e6a84a1 | 158 | |
3540caec MW |
159 | err= check_domain_name(ads, flags,ctx,typei, qumsg_vb->buf,qumsg_vb->used); |
160 | if (err) goto x_err; | |
27af7cd3 | 161 | qu= query_alloc(ads,typei,type,flags,now); |
3540caec | 162 | if (!qu) { err = adns_s_nomemory; goto x_err; } |
7e6a84a1 | 163 | *query_r= qu; |
98db6da3 | 164 | |
7e6a84a1 | 165 | memcpy(&qu->ctx,ctx,sizeof(qu->ctx)); |
166 | query_submit(ads,qu, typei,qumsg_vb,id,flags,now); | |
167 | ||
11c8bf9b | 168 | return adns_s_ok; |
3540caec MW |
169 | |
170 | x_err: | |
171 | adns__vbuf_free(qumsg_vb); | |
172 | return err; | |
7e6a84a1 | 173 | } |
174 | ||
175 | static void query_simple(adns_state ads, adns_query qu, | |
176 | const char *owner, int ol, | |
177 | const typeinfo *typei, adns_queryflags flags, | |
178 | struct timeval now) { | |
a880d9ba | 179 | vbuf vb_new; |
7e6a84a1 | 180 | int id; |
181 | adns_status stat; | |
98db6da3 | 182 | |
7d0aaee4 | 183 | stat= adns__mkquery(ads,&qu->vb,&id, owner,ol, |
184 | typei,qu->answer->type, flags); | |
a880d9ba | 185 | if (stat) { |
186 | if (stat == adns_s_querydomaintoolong && (flags & adns_qf_search)) { | |
187 | adns__search_next(ads,qu,now); | |
188 | return; | |
189 | } else { | |
190 | adns__query_fail(qu,stat); | |
191 | return; | |
192 | } | |
193 | } | |
194 | ||
3540caec MW |
195 | stat= check_domain_name(ads, flags,&qu->ctx,typei, qu->vb.buf,qu->vb.used); |
196 | if (stat) { adns__query_fail(qu,stat); return; } | |
197 | ||
a880d9ba | 198 | vb_new= qu->vb; |
199 | adns__vbuf_init(&qu->vb); | |
200 | query_submit(ads,qu, typei,&vb_new,id, flags,now); | |
7e6a84a1 | 201 | } |
202 | ||
203 | void adns__search_next(adns_state ads, adns_query qu, struct timeval now) { | |
204 | const char *nextentry; | |
205 | adns_status stat; | |
206 | ||
207 | if (qu->search_doneabs<0) { | |
208 | nextentry= 0; | |
209 | qu->search_doneabs= 1; | |
210 | } else { | |
211 | if (qu->search_pos >= ads->nsearchlist) { | |
212 | if (qu->search_doneabs) { | |
85021e18 | 213 | qu->search_vb.used= qu->search_origlen; |
7e6a84a1 | 214 | stat= adns_s_nxdomain; goto x_fail; |
7e6a84a1 | 215 | } else { |
216 | nextentry= 0; | |
217 | qu->search_doneabs= 1; | |
218 | } | |
219 | } else { | |
220 | nextentry= ads->searchlist[qu->search_pos++]; | |
221 | } | |
222 | } | |
223 | ||
a5da6822 | 224 | qu->search_vb.used= qu->search_origlen; |
7e6a84a1 | 225 | if (nextentry) { |
226 | if (!adns__vbuf_append(&qu->search_vb,".",1) || | |
85021e18 | 227 | !adns__vbuf_appendstr(&qu->search_vb,nextentry)) |
228 | goto x_nomemory; | |
7e6a84a1 | 229 | } |
230 | ||
231 | free(qu->query_dgram); | |
232 | qu->query_dgram= 0; qu->query_dglen= 0; | |
233 | ||
9c344a42 | 234 | query_simple(ads,qu, qu->search_vb.buf, qu->search_vb.used, |
235 | qu->typei, qu->flags, now); | |
7e6a84a1 | 236 | return; |
85021e18 | 237 | |
238 | x_nomemory: | |
239 | stat= adns_s_nomemory; | |
7e6a84a1 | 240 | x_fail: |
241 | adns__query_fail(qu,stat); | |
48cb0b4b | 242 | } |
243 | ||
b2988d3e | 244 | static int save_owner(adns_query qu, const char *owner, int ol) { |
245 | /* Returns 1 if OK, otherwise there was no memory. */ | |
246 | adns_answer *ans; | |
247 | ||
85021e18 | 248 | if (!(qu->flags & adns_qf_owner)) return 1; |
249 | ||
b2988d3e | 250 | ans= qu->answer; |
251 | assert(!ans->owner); | |
252 | ||
1be24aef | 253 | ans->owner= adns__alloc_preserved(qu,ol+1); if (!ans->owner) return 0; |
b2988d3e | 254 | |
255 | memcpy(ans->owner,owner,ol); | |
256 | ans->owner[ol]= 0; | |
257 | return 1; | |
258 | } | |
259 | ||
98db6da3 | 260 | int adns_submit(adns_state ads, |
261 | const char *owner, | |
262 | adns_rrtype type, | |
edb95764 | 263 | adns_queryflags flags, |
98db6da3 | 264 | void *context, |
265 | adns_query *query_r) { | |
7e6a84a1 | 266 | int r, ol, ndots; |
11c8bf9b | 267 | adns_status stat; |
268 | const typeinfo *typei; | |
269 | struct timeval now; | |
7e6a84a1 | 270 | adns_query qu; |
271 | const char *p; | |
98db6da3 | 272 | |
2ac463bf | 273 | adns__consistency(ads,0,cc_entex); |
1389dc72 | 274 | |
11c8bf9b | 275 | typei= adns__findtype(type); |
125de2a9 | 276 | if (!typei) return ENOSYS; |
98db6da3 | 277 | |
7e6a84a1 | 278 | r= gettimeofday(&now,0); if (r) goto x_errno; |
7d0aaee4 | 279 | qu= query_alloc(ads,typei,type,flags,now); if (!qu) goto x_errno; |
7e6a84a1 | 280 | |
281 | qu->ctx.ext= context; | |
282 | qu->ctx.callback= 0; | |
334c6111 MW |
283 | memset(&qu->ctx.pinfo,0,sizeof(qu->ctx.pinfo)); |
284 | memset(&qu->ctx.tinfo,0,sizeof(qu->ctx.tinfo)); | |
98db6da3 | 285 | |
a5da6822 | 286 | *query_r= qu; |
287 | ||
98db6da3 | 288 | ol= strlen(owner); |
7e6a84a1 | 289 | if (!ol) { stat= adns_s_querydomaininvalid; goto x_adnsfail; } |
290 | if (ol>DNS_MAXDOMAIN+1) { stat= adns_s_querydomaintoolong; goto x_adnsfail; } | |
98db6da3 | 291 | |
7683abe2 | 292 | if (ol>=1 && owner[ol-1]=='.' && (ol<2 || owner[ol-2]!='\\')) { |
293 | flags &= ~adns_qf_search; | |
30c317a4 | 294 | qu->flags= flags; |
7683abe2 | 295 | ol--; |
296 | } | |
98db6da3 | 297 | |
7e6a84a1 | 298 | if (flags & adns_qf_search) { |
299 | r= adns__vbuf_append(&qu->search_vb,owner,ol); | |
300 | if (!r) { stat= adns_s_nomemory; goto x_adnsfail; } | |
301 | ||
302 | for (ndots=0, p=owner; (p= strchr(p,'.')); p++, ndots++); | |
303 | qu->search_doneabs= (ndots >= ads->searchndots) ? -1 : 0; | |
7e6a84a1 | 304 | qu->search_origlen= ol; |
7e6a84a1 | 305 | adns__search_next(ads,qu,now); |
a5da6822 | 306 | } else { |
b2988d3e | 307 | if (flags & adns_qf_owner) { |
308 | if (!save_owner(qu,owner,ol)) { stat= adns_s_nomemory; goto x_adnsfail; } | |
309 | } | |
a5da6822 | 310 | query_simple(ads,qu, owner,ol, typei,flags, now); |
7e6a84a1 | 311 | } |
ab898cf4 | 312 | adns__autosys(ads,now); |
2ac463bf | 313 | adns__consistency(ads,qu,cc_entex); |
7e6a84a1 | 314 | return 0; |
315 | ||
316 | x_adnsfail: | |
317 | adns__query_fail(qu,stat); | |
2ac463bf | 318 | adns__consistency(ads,qu,cc_entex); |
7e6a84a1 | 319 | return 0; |
320 | ||
321 | x_errno: | |
322 | r= errno; | |
323 | assert(r); | |
2ac463bf | 324 | adns__consistency(ads,0,cc_entex); |
7e6a84a1 | 325 | return r; |
96e79df5 | 326 | } |
327 | ||
8a53cf7f MW |
328 | static const char *default_zone = "<magic>"; |
329 | ||
d2f6d877 | 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) { | |
8a53cf7f | 337 | char *buf, *buf_free, *p; |
d2f6d877 | 338 | char shortbuf[100]; |
8a53cf7f | 339 | const afinfo *ai; |
d2f6d877 | 340 | int r, lreq; |
5e6342f0 | 341 | |
5e6342f0 | 342 | flags &= ~adns_qf_search; |
343 | ||
8a53cf7f MW |
344 | switch (addr->sa_family) { |
345 | case AF_INET: | |
346 | ai = &adns__inet_afinfo; | |
347 | if (zone == default_zone) zone = "in-addr.arpa"; | |
348 | break; | |
349 | case AF_INET6: | |
350 | ai = &adns__inet6_afinfo; | |
351 | if (zone == default_zone) zone = "ip6.arpa"; | |
352 | break; | |
353 | default: | |
354 | return ENOSYS; | |
355 | } | |
5e6342f0 | 356 | |
8a53cf7f | 357 | lreq= strlen(zone) + ai->nrevcomp*(ai->revcompwd + 1) + 1; |
d2f6d877 | 358 | if (lreq > sizeof(shortbuf)) { |
8a53cf7f | 359 | buf= malloc(lreq); |
d2f6d877 | 360 | if (!buf) return errno; |
361 | buf_free= buf; | |
362 | } else { | |
363 | buf= shortbuf; | |
364 | buf_free= 0; | |
365 | } | |
8a53cf7f MW |
366 | |
367 | p = ai->rev_mkname(addr, buf); | |
368 | *p++ = '.'; | |
369 | strcpy(p, zone); | |
5e6342f0 | 370 | |
d2f6d877 | 371 | r= adns_submit(ads,buf,type,flags,context,query_r); |
372 | free(buf_free); | |
373 | return r; | |
374 | } | |
375 | ||
376 | int adns_submit_reverse(adns_state ads, | |
377 | const struct sockaddr *addr, | |
378 | adns_rrtype type, | |
379 | adns_queryflags flags, | |
380 | void *context, | |
381 | adns_query *query_r) { | |
382 | if (type != adns_r_ptr && type != adns_r_ptr_raw) return EINVAL; | |
8a53cf7f | 383 | return adns_submit_reverse_any(ads,addr,default_zone, |
9c344a42 | 384 | type,flags,context,query_r); |
5e6342f0 | 385 | } |
386 | ||
98db6da3 | 387 | int adns_synchronous(adns_state ads, |
388 | const char *owner, | |
389 | adns_rrtype type, | |
edb95764 | 390 | adns_queryflags flags, |
98db6da3 | 391 | adns_answer **answer_r) { |
392 | adns_query qu; | |
393 | int r; | |
394 | ||
395 | r= adns_submit(ads,owner,type,flags,0,&qu); | |
396 | if (r) return r; | |
48cb0b4b | 397 | |
f318f883 | 398 | r= adns_wait(ads,&qu,answer_r,0); |
11c8bf9b | 399 | if (r) adns_cancel(qu); |
96e79df5 | 400 | |
f318f883 | 401 | return r; |
98db6da3 | 402 | } |
403 | ||
c9afe7bb | 404 | static void *alloc_common(adns_query qu, size_t sz) { |
98db6da3 | 405 | allocnode *an; |
406 | ||
f47cdeec | 407 | if (!sz) return qu; /* Any old pointer will do */ |
98db6da3 | 408 | assert(!qu->final_allocspace); |
98db6da3 | 409 | an= malloc(MEM_ROUND(MEM_ROUND(sizeof(*an)) + sz)); |
f2ad23ee | 410 | if (!an) return 0; |
bc01473e | 411 | LIST_LINK_TAIL(qu->allocations,an); |
5f8085b7 | 412 | an->sz = sz; |
98db6da3 | 413 | return (byte*)an + MEM_ROUND(sizeof(*an)); |
414 | } | |
48cb0b4b | 415 | |
c9afe7bb | 416 | void *adns__alloc_interim(adns_query qu, size_t sz) { |
1be24aef | 417 | void *rv; |
418 | ||
c9afe7bb | 419 | sz= MEM_ROUND(sz); |
1be24aef | 420 | rv= alloc_common(qu,sz); |
421 | if (!rv) return 0; | |
c9afe7bb | 422 | qu->interim_allocd += sz; |
1be24aef | 423 | return rv; |
424 | } | |
425 | ||
426 | void *adns__alloc_preserved(adns_query qu, size_t sz) { | |
427 | void *rv; | |
428 | ||
429 | sz= MEM_ROUND(sz); | |
430 | rv= adns__alloc_interim(qu,sz); | |
431 | if (!rv) return 0; | |
432 | qu->preserved_allocd += sz; | |
433 | return rv; | |
c9afe7bb | 434 | } |
435 | ||
37883323 | 436 | static allocnode *alloc_info(adns_query qu, void *p, size_t *sz_r) |
96818a13 | 437 | { |
5f8085b7 | 438 | allocnode *an; |
5f8085b7 | 439 | |
37883323 | 440 | if (!p || p == qu) { *sz_r = 0; return 0; } |
5f8085b7 | 441 | an = (allocnode *)((byte *)p - MEM_ROUND(sizeof(allocnode))); |
96818a13 MW |
442 | *sz_r = MEM_ROUND(an->sz); |
443 | return an; | |
444 | } | |
445 | ||
446 | void adns__free_interim(adns_query qu, void *p) { | |
447 | size_t sz; | |
37883323 | 448 | allocnode *an = alloc_info(qu, p, &sz); |
96818a13 MW |
449 | |
450 | if (!an) return; | |
451 | assert(!qu->final_allocspace); | |
5f8085b7 MW |
452 | LIST_UNLINK(qu->allocations, an); |
453 | free(an); | |
454 | qu->interim_allocd -= sz; | |
455 | } | |
456 | ||
c9afe7bb | 457 | void *adns__alloc_mine(adns_query qu, size_t sz) { |
458 | return alloc_common(qu,MEM_ROUND(sz)); | |
459 | } | |
460 | ||
96818a13 MW |
461 | void adns__transfer_interim(adns_query from, adns_query to, void *block) { |
462 | size_t sz; | |
37883323 | 463 | allocnode *an = alloc_info(from, block, &sz); |
bc01473e | 464 | |
96818a13 | 465 | if (!an) return; |
bc01473e | 466 | |
467 | assert(!to->final_allocspace); | |
468 | assert(!from->final_allocspace); | |
469 | ||
470 | LIST_UNLINK(from->allocations,an); | |
471 | LIST_LINK_TAIL(to->allocations,an); | |
472 | ||
473 | from->interim_allocd -= sz; | |
474 | to->interim_allocd += sz; | |
2c7b101b | 475 | |
476 | if (to->expires > from->expires) to->expires= from->expires; | |
bc01473e | 477 | } |
478 | ||
98db6da3 | 479 | void *adns__alloc_final(adns_query qu, size_t sz) { |
480 | /* When we're in the _final stage, we _subtract_ from interim_alloc'd | |
481 | * each allocation, and use final_allocspace to point to the next free | |
482 | * bit. | |
483 | */ | |
484 | void *rp; | |
485 | ||
486 | sz= MEM_ROUND(sz); | |
487 | rp= qu->final_allocspace; | |
488 | assert(rp); | |
489 | qu->interim_allocd -= sz; | |
490 | assert(qu->interim_allocd>=0); | |
491 | qu->final_allocspace= (byte*)rp + sz; | |
492 | return rp; | |
493 | } | |
494 | ||
5f8085b7 | 495 | void adns__cancel_children(adns_query qu) { |
61093792 | 496 | adns_query cqu, ncqu; |
497 | ||
498 | for (cqu= qu->children.head; cqu; cqu= ncqu) { | |
499 | ncqu= cqu->siblings.next; | |
500 | adns_cancel(cqu); | |
501 | } | |
61093792 | 502 | } |
503 | ||
1be24aef | 504 | void adns__reset_preserved(adns_query qu) { |
9a2b67d4 | 505 | assert(!qu->final_allocspace); |
5f8085b7 | 506 | adns__cancel_children(qu); |
98db6da3 | 507 | qu->answer->nrrs= 0; |
763d28b9 | 508 | qu->answer->rrs.untyped= 0; |
1be24aef | 509 | qu->interim_allocd= qu->preserved_allocd; |
d05cc330 | 510 | } |
511 | ||
f318f883 | 512 | static void free_query_allocs(adns_query qu) { |
513 | allocnode *an, *ann; | |
f318f883 | 514 | |
5f8085b7 | 515 | adns__cancel_children(qu); |
bc01473e | 516 | for (an= qu->allocations.head; an; an= ann) { ann= an->next; free(an); } |
9f1041a6 | 517 | LIST_INIT(qu->allocations); |
f318f883 | 518 | adns__vbuf_free(&qu->vb); |
fc86e61f | 519 | adns__vbuf_free(&qu->search_vb); |
b8d9a971 | 520 | free(qu->query_dgram); |
d94fa362 | 521 | qu->query_dgram= 0; |
f318f883 | 522 | } |
523 | ||
26eb6bdc | 524 | void adns_cancel(adns_query qu) { |
1389dc72 | 525 | adns_state ads; |
526 | ||
527 | ads= qu->ads; | |
2ac463bf | 528 | adns__consistency(ads,qu,cc_entex); |
0b772fb9 | 529 | if (qu->parent) LIST_UNLINK_PART(qu->parent->children,qu,siblings.); |
f318f883 | 530 | switch (qu->state) { |
d0a057ac | 531 | case query_tosend: |
532 | LIST_UNLINK(ads->udpw,qu); | |
f318f883 | 533 | break; |
d0a057ac | 534 | case query_tcpw: |
535 | LIST_UNLINK(ads->tcpw,qu); | |
536 | break; | |
537 | case query_childw: | |
1389dc72 | 538 | LIST_UNLINK(ads->childw,qu); |
f318f883 | 539 | break; |
540 | case query_done: | |
1389dc72 | 541 | LIST_UNLINK(ads->output,qu); |
f318f883 | 542 | break; |
543 | default: | |
544 | abort(); | |
545 | } | |
546 | free_query_allocs(qu); | |
547 | free(qu->answer); | |
548 | free(qu); | |
2ac463bf | 549 | adns__consistency(ads,0,cc_entex); |
f318f883 | 550 | } |
bc01473e | 551 | |
9c344a42 | 552 | void adns__update_expires(adns_query qu, unsigned long ttl, |
553 | struct timeval now) { | |
2c7b101b | 554 | time_t max; |
555 | ||
556 | assert(ttl <= MAXTTLBELIEVE); | |
557 | max= now.tv_sec + ttl; | |
558 | if (qu->expires < max) return; | |
559 | qu->expires= max; | |
560 | } | |
561 | ||
bc01473e | 562 | static void makefinal_query(adns_query qu) { |
5c596e4d | 563 | adns_answer *ans; |
f318f883 | 564 | int rrn; |
965c9782 | 565 | |
f318f883 | 566 | ans= qu->answer; |
bc01473e | 567 | |
f318f883 | 568 | if (qu->interim_allocd) { |
9c344a42 | 569 | ans= realloc(qu->answer, |
570 | MEM_ROUND(MEM_ROUND(sizeof(*ans)) + qu->interim_allocd)); | |
bc01473e | 571 | if (!ans) goto x_nomem; |
f2ad23ee | 572 | qu->answer= ans; |
573 | } | |
965c9782 | 574 | |
f318f883 | 575 | qu->final_allocspace= (byte*)ans + MEM_ROUND(sizeof(*ans)); |
965c9782 | 576 | adns__makefinal_str(qu,&ans->cname); |
b2988d3e | 577 | adns__makefinal_str(qu,&ans->owner); |
f318f883 | 578 | |
965c9782 | 579 | if (ans->nrrs) { |
f318f883 | 580 | adns__makefinal_block(qu, &ans->rrs.untyped, ans->nrrs*ans->rrsz); |
965c9782 | 581 | |
f318f883 | 582 | for (rrn=0; rrn<ans->nrrs; rrn++) |
583 | qu->typei->makefinal(qu, ans->rrs.bytes + rrn*ans->rrsz); | |
f318f883 | 584 | } |
2c7b101b | 585 | |
f318f883 | 586 | free_query_allocs(qu); |
bc01473e | 587 | return; |
965c9782 | 588 | |
bc01473e | 589 | x_nomem: |
1be24aef | 590 | qu->preserved_allocd= 0; |
bc01473e | 591 | qu->answer->cname= 0; |
1be24aef | 592 | qu->answer->owner= 0; |
593 | adns__reset_preserved(qu); /* (but we just threw away the preserved stuff) */ | |
594 | ||
595 | qu->answer->status= adns_s_nomemory; | |
bc01473e | 596 | free_query_allocs(qu); |
597 | } | |
598 | ||
599 | void adns__query_done(adns_query qu) { | |
600 | adns_answer *ans; | |
601 | adns_query parent; | |
602 | ||
5f8085b7 | 603 | adns__cancel_children(qu); |
cb32030b | 604 | |
d05cc330 | 605 | qu->id= -1; |
bc01473e | 606 | ans= qu->answer; |
607 | ||
85021e18 | 608 | if (qu->flags & adns_qf_search && ans->status != adns_s_nomemory) { |
b2988d3e | 609 | if (!save_owner(qu, qu->search_vb.buf, qu->search_vb.used)) { |
610 | adns__query_fail(qu,adns_s_nomemory); | |
611 | return; | |
612 | } | |
613 | } | |
614 | ||
bc01473e | 615 | if (ans->nrrs && qu->typei->diff_needswap) { |
5f8085b7 | 616 | if (!adns__vbuf_ensure(&qu->vb,ans->rrsz)) { |
9b86645c | 617 | adns__query_fail(qu,adns_s_nomemory); |
bc01473e | 618 | return; |
619 | } | |
620 | adns__isort(ans->rrs.bytes, ans->nrrs, ans->rrsz, | |
8c3aa944 | 621 | qu->vb.buf, |
9c344a42 | 622 | (int(*)(void*, const void*, const void*)) |
623 | qu->typei->diff_needswap, | |
8c3aa944 | 624 | qu->ads); |
bc01473e | 625 | } |
59d05d1c | 626 | if (ans->nrrs && qu->typei->postsort) { |
627 | qu->typei->postsort(qu->ads, ans->rrs.bytes, ans->nrrs, qu->typei); | |
628 | } | |
a095483e | 629 | |
2c7b101b | 630 | ans->expires= qu->expires; |
bc01473e | 631 | parent= qu->parent; |
632 | if (parent) { | |
633 | LIST_UNLINK_PART(parent->children,qu,siblings.); | |
cb32030b | 634 | LIST_UNLINK(qu->ads->childw,parent); |
cd1bde2f | 635 | qu->ctx.callback(parent,qu); |
bc01473e | 636 | free_query_allocs(qu); |
b8d9a971 | 637 | free(qu->answer); |
bc01473e | 638 | free(qu); |
bc01473e | 639 | } else { |
640 | makefinal_query(qu); | |
641 | LIST_LINK_TAIL(qu->ads->output,qu); | |
0b772fb9 | 642 | qu->state= query_done; |
bc01473e | 643 | } |
6f17710a | 644 | } |
645 | ||
11c8bf9b | 646 | void adns__query_fail(adns_query qu, adns_status stat) { |
1be24aef | 647 | adns__reset_preserved(qu); |
965c9782 | 648 | qu->answer->status= stat; |
11c8bf9b | 649 | adns__query_done(qu); |
6f17710a | 650 | } |
98db6da3 | 651 | |
652 | void adns__makefinal_str(adns_query qu, char **strp) { | |
653 | int l; | |
654 | char *before, *after; | |
655 | ||
656 | before= *strp; | |
9a2b67d4 | 657 | if (!before) return; |
98db6da3 | 658 | l= strlen(before)+1; |
659 | after= adns__alloc_final(qu,l); | |
660 | memcpy(after,before,l); | |
661 | *strp= after; | |
662 | } | |
663 | ||
11c8bf9b | 664 | void adns__makefinal_block(adns_query qu, void **blpp, size_t sz) { |
9a2b67d4 | 665 | void *before, *after; |
98db6da3 | 666 | |
9a2b67d4 | 667 | before= *blpp; |
668 | if (!before) return; | |
98db6da3 | 669 | after= adns__alloc_final(qu,sz); |
9a2b67d4 | 670 | memcpy(after,before,sz); |
98db6da3 | 671 | *blpp= after; |
672 | } |