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 |
26e1c3d6 | 9 | * Copyright (C) 1997-2000,2003,2006,2014 Ian Jackson |
17cd4f48 | 10 | * Copyright (C) 2014 Mark Wooding |
ae8cc977 | 11 | * Copyright (C) 1999-2000,2003,2006 Tony Finch |
12 | * Copyright (C) 1991 Massachusetts Institute of Technology | |
13 | * (See the file INSTALL for full details.) | |
e576be50 | 14 | * |
15 | * This program is free software; you can redistribute it and/or modify | |
16 | * it under the terms of the GNU General Public License as published by | |
7f8bbe29 | 17 | * the Free Software Foundation; either version 3, or (at your option) |
e576be50 | 18 | * any later version. |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, | |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | * GNU General Public License for more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
8c09a4c6 | 26 | * along with this program; if not, write to the Free Software Foundation. |
e576be50 | 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; |
042b0909 | 86 | qu->answer->rrsz= typei->getrrsz(typei,type); |
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); | |
13826233 MW |
107 | |
108 | typei->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, | |
0b062ecc | 114 | const char *dgram, int labstart, int lablen) |
e8e5aeac MW |
115 | { |
116 | int i, c; | |
0b062ecc | 117 | const char *label = dgram+labstart; |
e8e5aeac MW |
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; | |
11c4794c | 136 | adns_status st; |
e8e5aeac MW |
137 | int labnum= 0, labstart, lablen; |
138 | union checklabel_state cls; | |
139 | ||
140 | adns__findlabel_start(&fls,ads, -1,0, dgram,dglen,dglen, DNS_HDRSIZE,0); | |
141 | do { | |
11c4794c IJ |
142 | st= adns__findlabel_next(&fls, &lablen,&labstart); |
143 | assert(!st); assert(lablen >= 0); | |
144 | st= typei->checklabel(ads,flags, &cls,ctx, | |
0b062ecc | 145 | labnum++, dgram,labstart,lablen); |
11c4794c | 146 | if (st) return st; |
e8e5aeac MW |
147 | } while (lablen); |
148 | return adns_s_ok; | |
149 | } | |
150 | ||
660d7d3b | 151 | adns_status adns__internal_submit(adns_state ads, adns_query *query_r, |
07c3d3e2 | 152 | adns_query parent, |
7f593711 MW |
153 | const typeinfo *typei, adns_rrtype type, |
154 | vbuf *qumsg_vb, int id, | |
660d7d3b | 155 | adns_queryflags flags, struct timeval now, |
be4d66dc | 156 | qcontext *ctx) { |
660d7d3b | 157 | adns_query qu; |
11c4794c | 158 | adns_status st; |
660d7d3b | 159 | |
11c4794c IJ |
160 | st= check_domain_name(ads, flags,ctx,typei, qumsg_vb->buf,qumsg_vb->used); |
161 | if (st) goto x_err; | |
7f593711 | 162 | qu= query_alloc(ads,typei,type,flags,now); |
11c4794c | 163 | if (!qu) { st = adns_s_nomemory; goto x_err; } |
660d7d3b | 164 | *query_r= qu; |
e576be50 | 165 | |
07c3d3e2 IJ |
166 | qu->parent= parent; |
167 | LIST_LINK_TAIL_PART(parent->children,qu,siblings.); | |
660d7d3b | 168 | memcpy(&qu->ctx,ctx,sizeof(qu->ctx)); |
169 | query_submit(ads,qu, typei,qumsg_vb,id,flags,now); | |
170 | ||
3955725c | 171 | return adns_s_ok; |
e8e5aeac MW |
172 | |
173 | x_err: | |
174 | adns__vbuf_free(qumsg_vb); | |
11c4794c | 175 | return st; |
660d7d3b | 176 | } |
177 | ||
178 | static void query_simple(adns_state ads, adns_query qu, | |
179 | const char *owner, int ol, | |
180 | const typeinfo *typei, adns_queryflags flags, | |
181 | struct timeval now) { | |
149dd923 | 182 | vbuf vb_new; |
660d7d3b | 183 | int id; |
6b7c4ef0 | 184 | adns_status st; |
e576be50 | 185 | |
6b7c4ef0 | 186 | st= adns__mkquery(ads,&qu->vb,&id, owner,ol, |
2c6eb096 | 187 | typei,qu->answer->type, flags); |
6b7c4ef0 IJ |
188 | if (st) { |
189 | if (st == adns_s_querydomaintoolong && (flags & adns_qf_search)) { | |
149dd923 | 190 | adns__search_next(ads,qu,now); |
191 | return; | |
192 | } else { | |
6b7c4ef0 | 193 | adns__query_fail(qu,st); |
149dd923 | 194 | return; |
195 | } | |
196 | } | |
197 | ||
6b7c4ef0 IJ |
198 | st= check_domain_name(ads, flags,&qu->ctx,typei, qu->vb.buf,qu->vb.used); |
199 | if (st) { adns__query_fail(qu,st); return; } | |
e8e5aeac | 200 | |
149dd923 | 201 | vb_new= qu->vb; |
202 | adns__vbuf_init(&qu->vb); | |
203 | query_submit(ads,qu, typei,&vb_new,id, flags,now); | |
660d7d3b | 204 | } |
205 | ||
206 | void adns__search_next(adns_state ads, adns_query qu, struct timeval now) { | |
207 | const char *nextentry; | |
6b7c4ef0 | 208 | adns_status st; |
660d7d3b | 209 | |
210 | if (qu->search_doneabs<0) { | |
211 | nextentry= 0; | |
212 | qu->search_doneabs= 1; | |
213 | } else { | |
214 | if (qu->search_pos >= ads->nsearchlist) { | |
215 | if (qu->search_doneabs) { | |
ac015392 | 216 | qu->search_vb.used= qu->search_origlen; |
6b7c4ef0 | 217 | st= adns_s_nxdomain; goto x_fail; |
660d7d3b | 218 | } else { |
219 | nextentry= 0; | |
220 | qu->search_doneabs= 1; | |
221 | } | |
222 | } else { | |
223 | nextentry= ads->searchlist[qu->search_pos++]; | |
224 | } | |
225 | } | |
226 | ||
e2632eb9 | 227 | qu->search_vb.used= qu->search_origlen; |
660d7d3b | 228 | if (nextentry) { |
229 | if (!adns__vbuf_append(&qu->search_vb,".",1) || | |
ac015392 | 230 | !adns__vbuf_appendstr(&qu->search_vb,nextentry)) |
231 | goto x_nomemory; | |
660d7d3b | 232 | } |
233 | ||
234 | free(qu->query_dgram); | |
235 | qu->query_dgram= 0; qu->query_dglen= 0; | |
236 | ||
609133ee | 237 | query_simple(ads,qu, qu->search_vb.buf, qu->search_vb.used, |
238 | qu->typei, qu->flags, now); | |
660d7d3b | 239 | return; |
ac015392 | 240 | |
241 | x_nomemory: | |
6b7c4ef0 | 242 | st= adns_s_nomemory; |
660d7d3b | 243 | x_fail: |
6b7c4ef0 | 244 | adns__query_fail(qu,st); |
4bec51a4 | 245 | } |
246 | ||
22181a31 | 247 | static int save_owner(adns_query qu, const char *owner, int ol) { |
248 | /* Returns 1 if OK, otherwise there was no memory. */ | |
249 | adns_answer *ans; | |
250 | ||
ac015392 | 251 | if (!(qu->flags & adns_qf_owner)) return 1; |
252 | ||
22181a31 | 253 | ans= qu->answer; |
254 | assert(!ans->owner); | |
255 | ||
8b3d55e3 | 256 | ans->owner= adns__alloc_preserved(qu,ol+1); if (!ans->owner) return 0; |
22181a31 | 257 | |
258 | memcpy(ans->owner,owner,ol); | |
259 | ans->owner[ol]= 0; | |
260 | return 1; | |
261 | } | |
262 | ||
e576be50 | 263 | int adns_submit(adns_state ads, |
264 | const char *owner, | |
265 | adns_rrtype type, | |
e563872a | 266 | adns_queryflags flags, |
e576be50 | 267 | void *context, |
268 | adns_query *query_r) { | |
660d7d3b | 269 | int r, ol, ndots; |
6b7c4ef0 | 270 | adns_status st; |
3955725c | 271 | const typeinfo *typei; |
272 | struct timeval now; | |
660d7d3b | 273 | adns_query qu; |
274 | const char *p; | |
e576be50 | 275 | |
28de6442 | 276 | adns__consistency(ads,0,cc_entex); |
3e2e5fab | 277 | |
039a0566 IJ |
278 | if (flags & ~(adns_queryflags)0x4009ffff) |
279 | /* 0x40080000 are reserved for `harmless' future expansion | |
280 | * 0x00000020 used to be adns_qf_quoteok_cname, now the default; | |
281 | * see also addrfam.c:textaddr_check_qf */ | |
282 | return ENOSYS; | |
283 | ||
3955725c | 284 | typei= adns__findtype(type); |
636b69b1 | 285 | if (!typei) return ENOSYS; |
e576be50 | 286 | |
660d7d3b | 287 | r= gettimeofday(&now,0); if (r) goto x_errno; |
2c6eb096 | 288 | qu= query_alloc(ads,typei,type,flags,now); if (!qu) goto x_errno; |
660d7d3b | 289 | |
290 | qu->ctx.ext= context; | |
291 | qu->ctx.callback= 0; | |
0ea82d76 MW |
292 | memset(&qu->ctx.pinfo,0,sizeof(qu->ctx.pinfo)); |
293 | memset(&qu->ctx.tinfo,0,sizeof(qu->ctx.tinfo)); | |
e576be50 | 294 | |
e2632eb9 | 295 | *query_r= qu; |
296 | ||
e576be50 | 297 | ol= strlen(owner); |
6b7c4ef0 IJ |
298 | if (!ol) { st= adns_s_querydomaininvalid; goto x_adnsfail; } |
299 | if (ol>DNS_MAXDOMAIN+1) { st= adns_s_querydomaintoolong; goto x_adnsfail; } | |
e576be50 | 300 | |
e9e53c73 | 301 | if (ol>=1 && owner[ol-1]=='.' && (ol<2 || owner[ol-2]!='\\')) { |
302 | flags &= ~adns_qf_search; | |
3d1ae6ea | 303 | qu->flags= flags; |
e9e53c73 | 304 | ol--; |
305 | } | |
e576be50 | 306 | |
660d7d3b | 307 | if (flags & adns_qf_search) { |
308 | r= adns__vbuf_append(&qu->search_vb,owner,ol); | |
6b7c4ef0 | 309 | if (!r) { st= adns_s_nomemory; goto x_adnsfail; } |
660d7d3b | 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) { |
6b7c4ef0 | 317 | if (!save_owner(qu,owner,ol)) { st= adns_s_nomemory; goto x_adnsfail; } |
22181a31 | 318 | } |
e2632eb9 | 319 | query_simple(ads,qu, owner,ol, typei,flags, now); |
660d7d3b | 320 | } |
70ad7a2a | 321 | adns__autosys(ads,now); |
eb2a930e | 322 | adns__returning(ads,qu); |
660d7d3b | 323 | return 0; |
324 | ||
325 | x_adnsfail: | |
6b7c4ef0 | 326 | adns__query_fail(qu,st); |
eb2a930e | 327 | adns__returning(ads,qu); |
660d7d3b | 328 | return 0; |
329 | ||
330 | x_errno: | |
331 | r= errno; | |
332 | assert(r); | |
eb2a930e | 333 | adns__returning(ads,0); |
660d7d3b | 334 | return r; |
ddfda861 | 335 | } |
336 | ||
2b1c6979 | 337 | int adns_submit_reverse_any(adns_state ads, |
338 | const struct sockaddr *addr, | |
339 | const char *zone, | |
340 | adns_rrtype type, | |
341 | adns_queryflags flags, | |
342 | void *context, | |
343 | adns_query *query_r) { | |
51cb3de3 | 344 | char *buf, *buf_free = 0; |
2b1c6979 | 345 | char shortbuf[100]; |
51cb3de3 | 346 | int r; |
d7449548 | 347 | |
d7449548 | 348 | flags &= ~adns_qf_search; |
349 | ||
51cb3de3 MW |
350 | buf = shortbuf; |
351 | r= adns__make_reverse_domain(addr,zone, &buf,sizeof(shortbuf),&buf_free); | |
352 | if (r) return r; | |
2b1c6979 | 353 | r= adns_submit(ads,buf,type,flags,context,query_r); |
354 | free(buf_free); | |
355 | return r; | |
356 | } | |
357 | ||
358 | int adns_submit_reverse(adns_state ads, | |
359 | const struct sockaddr *addr, | |
360 | adns_rrtype type, | |
361 | adns_queryflags flags, | |
362 | void *context, | |
363 | adns_query *query_r) { | |
d24b603f MW |
364 | if (((type^adns_r_ptr) & adns_rrt_reprmask) && |
365 | ((type^adns_r_ptr_raw) & adns_rrt_reprmask)) | |
366 | return EINVAL; | |
51cb3de3 | 367 | return adns_submit_reverse_any(ads,addr,0,type,flags,context,query_r); |
d7449548 | 368 | } |
369 | ||
e576be50 | 370 | int adns_synchronous(adns_state ads, |
371 | const char *owner, | |
372 | adns_rrtype type, | |
e563872a | 373 | adns_queryflags flags, |
e576be50 | 374 | adns_answer **answer_r) { |
375 | adns_query qu; | |
376 | int r; | |
377 | ||
378 | r= adns_submit(ads,owner,type,flags,0,&qu); | |
379 | if (r) return r; | |
4bec51a4 | 380 | |
88372443 | 381 | r= adns_wait(ads,&qu,answer_r,0); |
3955725c | 382 | if (r) adns_cancel(qu); |
ddfda861 | 383 | |
88372443 | 384 | return r; |
e576be50 | 385 | } |
386 | ||
f759e52e | 387 | static void *alloc_common(adns_query qu, size_t sz) { |
e576be50 | 388 | allocnode *an; |
389 | ||
a49a6d7b | 390 | if (!sz) return qu; /* Any old pointer will do */ |
e576be50 | 391 | assert(!qu->final_allocspace); |
e576be50 | 392 | an= malloc(MEM_ROUND(MEM_ROUND(sizeof(*an)) + sz)); |
e062dcae | 393 | if (!an) return 0; |
551ff40f | 394 | LIST_LINK_TAIL(qu->allocations,an); |
2edb1757 | 395 | an->sz= sz; |
e576be50 | 396 | return (byte*)an + MEM_ROUND(sizeof(*an)); |
397 | } | |
4bec51a4 | 398 | |
f759e52e | 399 | void *adns__alloc_interim(adns_query qu, size_t sz) { |
8b3d55e3 | 400 | void *rv; |
401 | ||
f759e52e | 402 | sz= MEM_ROUND(sz); |
8b3d55e3 | 403 | rv= alloc_common(qu,sz); |
404 | if (!rv) return 0; | |
f759e52e | 405 | qu->interim_allocd += sz; |
8b3d55e3 | 406 | return rv; |
407 | } | |
408 | ||
409 | void *adns__alloc_preserved(adns_query qu, size_t sz) { | |
410 | void *rv; | |
411 | ||
412 | sz= MEM_ROUND(sz); | |
413 | rv= adns__alloc_interim(qu,sz); | |
414 | if (!rv) return 0; | |
415 | qu->preserved_allocd += sz; | |
416 | return rv; | |
f759e52e | 417 | } |
418 | ||
3034e24e | 419 | static allocnode *alloc__info(adns_query qu, void *p, size_t *sz_r) { |
2edb1757 MW |
420 | allocnode *an; |
421 | ||
422 | if (!p || p == qu) { *sz_r= 0; return 0; } | |
423 | an= (allocnode *)((byte *)p - MEM_ROUND(sizeof(allocnode))); | |
424 | *sz_r= MEM_ROUND(an->sz); | |
425 | return an; | |
426 | } | |
427 | ||
4c6fd94d MW |
428 | void adns__free_interim(adns_query qu, void *p) { |
429 | size_t sz; | |
3034e24e | 430 | allocnode *an= alloc__info(qu, p, &sz); |
4c6fd94d MW |
431 | |
432 | if (!an) return; | |
433 | assert(!qu->final_allocspace); | |
434 | LIST_UNLINK(qu->allocations, an); | |
435 | free(an); | |
436 | qu->interim_allocd -= sz; | |
1a80d99b | 437 | assert(!qu->interim_allocd >= 0); |
4c6fd94d MW |
438 | } |
439 | ||
f759e52e | 440 | void *adns__alloc_mine(adns_query qu, size_t sz) { |
441 | return alloc_common(qu,MEM_ROUND(sz)); | |
442 | } | |
443 | ||
2edb1757 MW |
444 | void adns__transfer_interim(adns_query from, adns_query to, void *block) { |
445 | size_t sz; | |
3034e24e | 446 | allocnode *an= alloc__info(from, block, &sz); |
551ff40f | 447 | |
2edb1757 | 448 | if (!an) return; |
551ff40f | 449 | |
450 | assert(!to->final_allocspace); | |
451 | assert(!from->final_allocspace); | |
452 | ||
453 | LIST_UNLINK(from->allocations,an); | |
454 | LIST_LINK_TAIL(to->allocations,an); | |
455 | ||
456 | from->interim_allocd -= sz; | |
457 | to->interim_allocd += sz; | |
73dba56e | 458 | |
459 | if (to->expires > from->expires) to->expires= from->expires; | |
551ff40f | 460 | } |
461 | ||
e576be50 | 462 | void *adns__alloc_final(adns_query qu, size_t sz) { |
463 | /* When we're in the _final stage, we _subtract_ from interim_alloc'd | |
464 | * each allocation, and use final_allocspace to point to the next free | |
465 | * bit. | |
466 | */ | |
467 | void *rp; | |
468 | ||
469 | sz= MEM_ROUND(sz); | |
470 | rp= qu->final_allocspace; | |
471 | assert(rp); | |
472 | qu->interim_allocd -= sz; | |
473 | assert(qu->interim_allocd>=0); | |
474 | qu->final_allocspace= (byte*)rp + sz; | |
475 | return rp; | |
476 | } | |
477 | ||
02887325 | 478 | void adns__cancel_children(adns_query qu) { |
9ec44266 | 479 | adns_query cqu, ncqu; |
480 | ||
481 | for (cqu= qu->children.head; cqu; cqu= ncqu) { | |
482 | ncqu= cqu->siblings.next; | |
64aae7c8 | 483 | adns__cancel(cqu); |
9ec44266 | 484 | } |
9ec44266 | 485 | } |
486 | ||
8b3d55e3 | 487 | void adns__reset_preserved(adns_query qu) { |
9557e604 | 488 | assert(!qu->final_allocspace); |
02887325 | 489 | adns__cancel_children(qu); |
e576be50 | 490 | qu->answer->nrrs= 0; |
71a6ff46 | 491 | qu->answer->rrs.untyped= 0; |
8b3d55e3 | 492 | qu->interim_allocd= qu->preserved_allocd; |
4353a5c4 | 493 | } |
494 | ||
88372443 | 495 | static void free_query_allocs(adns_query qu) { |
496 | allocnode *an, *ann; | |
88372443 | 497 | |
02887325 | 498 | adns__cancel_children(qu); |
551ff40f | 499 | for (an= qu->allocations.head; an; an= ann) { ann= an->next; free(an); } |
bfc2c80e | 500 | LIST_INIT(qu->allocations); |
88372443 | 501 | adns__vbuf_free(&qu->vb); |
914a5ff5 | 502 | adns__vbuf_free(&qu->search_vb); |
eed63b97 | 503 | free(qu->query_dgram); |
d1cac7c0 | 504 | qu->query_dgram= 0; |
88372443 | 505 | } |
506 | ||
eb2a930e | 507 | void adns__returning(adns_state ads, adns_query qu_for_caller) { |
b582ca0f IJ |
508 | while (ads->intdone.head) { |
509 | adns_query iq= ads->intdone.head; | |
510 | adns_query parent= iq->parent; | |
511 | LIST_UNLINK_PART(parent->children,iq,siblings.); | |
512 | LIST_UNLINK(iq->ads->childw,parent); | |
513 | LIST_UNLINK(ads->intdone,iq); | |
514 | iq->ctx.callback(parent,iq); | |
515 | free_query_allocs(iq); | |
516 | free(iq->answer); | |
517 | free(iq); | |
518 | } | |
eb2a930e IJ |
519 | adns__consistency(ads,qu_for_caller,cc_entex); |
520 | } | |
521 | ||
64aae7c8 | 522 | void adns__cancel(adns_query qu) { |
3e2e5fab | 523 | adns_state ads; |
524 | ||
525 | ads= qu->ads; | |
64aae7c8 | 526 | adns__consistency(ads,qu,cc_freq); |
33ae0ddd | 527 | if (qu->parent) LIST_UNLINK_PART(qu->parent->children,qu,siblings.); |
88372443 | 528 | switch (qu->state) { |
f7f83b4a | 529 | case query_tosend: |
530 | LIST_UNLINK(ads->udpw,qu); | |
88372443 | 531 | break; |
f7f83b4a | 532 | case query_tcpw: |
533 | LIST_UNLINK(ads->tcpw,qu); | |
534 | break; | |
535 | case query_childw: | |
3e2e5fab | 536 | LIST_UNLINK(ads->childw,qu); |
88372443 | 537 | break; |
538 | case query_done: | |
b582ca0f IJ |
539 | if (qu->parent) |
540 | LIST_UNLINK(ads->intdone,qu); | |
541 | else | |
542 | LIST_UNLINK(ads->output,qu); | |
88372443 | 543 | break; |
544 | default: | |
545 | abort(); | |
546 | } | |
547 | free_query_allocs(qu); | |
548 | free(qu->answer); | |
549 | free(qu); | |
64aae7c8 IJ |
550 | } |
551 | ||
552 | void adns_cancel(adns_query qu) { | |
553 | adns_state ads; | |
554 | ||
555 | assert(!qu->parent); | |
556 | ads= qu->ads; | |
557 | adns__consistency(ads,qu,cc_entex); | |
558 | adns__cancel(qu); | |
eb2a930e | 559 | adns__returning(ads,0); |
88372443 | 560 | } |
551ff40f | 561 | |
609133ee | 562 | void adns__update_expires(adns_query qu, unsigned long ttl, |
563 | struct timeval now) { | |
73dba56e | 564 | time_t max; |
565 | ||
566 | assert(ttl <= MAXTTLBELIEVE); | |
567 | max= now.tv_sec + ttl; | |
568 | if (qu->expires < max) return; | |
569 | qu->expires= max; | |
570 | } | |
571 | ||
551ff40f | 572 | static void makefinal_query(adns_query qu) { |
98a3f706 | 573 | adns_answer *ans; |
88372443 | 574 | int rrn; |
8e5b0abb | 575 | |
88372443 | 576 | ans= qu->answer; |
551ff40f | 577 | |
88372443 | 578 | if (qu->interim_allocd) { |
609133ee | 579 | ans= realloc(qu->answer, |
580 | MEM_ROUND(MEM_ROUND(sizeof(*ans)) + qu->interim_allocd)); | |
551ff40f | 581 | if (!ans) goto x_nomem; |
e062dcae | 582 | qu->answer= ans; |
583 | } | |
8e5b0abb | 584 | |
88372443 | 585 | qu->final_allocspace= (byte*)ans + MEM_ROUND(sizeof(*ans)); |
8e5b0abb | 586 | adns__makefinal_str(qu,&ans->cname); |
22181a31 | 587 | adns__makefinal_str(qu,&ans->owner); |
88372443 | 588 | |
8e5b0abb | 589 | if (ans->nrrs) { |
88372443 | 590 | adns__makefinal_block(qu, &ans->rrs.untyped, ans->nrrs*ans->rrsz); |
8e5b0abb | 591 | |
88372443 | 592 | for (rrn=0; rrn<ans->nrrs; rrn++) |
593 | qu->typei->makefinal(qu, ans->rrs.bytes + rrn*ans->rrsz); | |
88372443 | 594 | } |
73dba56e | 595 | |
88372443 | 596 | free_query_allocs(qu); |
551ff40f | 597 | return; |
8e5b0abb | 598 | |
551ff40f | 599 | x_nomem: |
8b3d55e3 | 600 | qu->preserved_allocd= 0; |
551ff40f | 601 | qu->answer->cname= 0; |
8b3d55e3 | 602 | qu->answer->owner= 0; |
603 | adns__reset_preserved(qu); /* (but we just threw away the preserved stuff) */ | |
604 | ||
605 | qu->answer->status= adns_s_nomemory; | |
551ff40f | 606 | free_query_allocs(qu); |
607 | } | |
608 | ||
609 | void adns__query_done(adns_query qu) { | |
b582ca0f | 610 | adns_state ads=qu->ads; |
551ff40f | 611 | adns_answer *ans; |
551ff40f | 612 | |
02887325 | 613 | adns__cancel_children(qu); |
4218fb9a | 614 | |
4353a5c4 | 615 | qu->id= -1; |
551ff40f | 616 | ans= qu->answer; |
617 | ||
ac015392 | 618 | if (qu->flags & adns_qf_search && ans->status != adns_s_nomemory) { |
22181a31 | 619 | if (!save_owner(qu, qu->search_vb.buf, qu->search_vb.used)) { |
620 | adns__query_fail(qu,adns_s_nomemory); | |
621 | return; | |
622 | } | |
623 | } | |
624 | ||
551ff40f | 625 | if (ans->nrrs && qu->typei->diff_needswap) { |
042b0909 | 626 | if (!adns__vbuf_ensure(&qu->vb,qu->answer->rrsz)) { |
ea1e31e3 | 627 | adns__query_fail(qu,adns_s_nomemory); |
551ff40f | 628 | return; |
629 | } | |
630 | adns__isort(ans->rrs.bytes, ans->nrrs, ans->rrsz, | |
09957b1c | 631 | qu->vb.buf, |
609133ee | 632 | (int(*)(void*, const void*, const void*)) |
633 | qu->typei->diff_needswap, | |
09957b1c | 634 | qu->ads); |
551ff40f | 635 | } |
d24e2a7e | 636 | if (ans->nrrs && qu->typei->postsort) { |
042b0909 MW |
637 | qu->typei->postsort(qu->ads, ans->rrs.bytes, |
638 | ans->nrrs,ans->rrsz, qu->typei); | |
d24e2a7e | 639 | } |
e553d072 | 640 | |
73dba56e | 641 | ans->expires= qu->expires; |
b582ca0f IJ |
642 | qu->state= query_done; |
643 | if (qu->parent) { | |
644 | LIST_LINK_TAIL(ads->intdone,qu); | |
551ff40f | 645 | } else { |
646 | makefinal_query(qu); | |
647 | LIST_LINK_TAIL(qu->ads->output,qu); | |
648 | } | |
656b2da9 | 649 | } |
650 | ||
6b7c4ef0 | 651 | void adns__query_fail(adns_query qu, adns_status st) { |
8b3d55e3 | 652 | adns__reset_preserved(qu); |
6b7c4ef0 | 653 | qu->answer->status= st; |
3955725c | 654 | adns__query_done(qu); |
656b2da9 | 655 | } |
e576be50 | 656 | |
657 | void adns__makefinal_str(adns_query qu, char **strp) { | |
658 | int l; | |
659 | char *before, *after; | |
660 | ||
661 | before= *strp; | |
9557e604 | 662 | if (!before) return; |
e576be50 | 663 | l= strlen(before)+1; |
664 | after= adns__alloc_final(qu,l); | |
665 | memcpy(after,before,l); | |
666 | *strp= after; | |
667 | } | |
668 | ||
3955725c | 669 | void adns__makefinal_block(adns_query qu, void **blpp, size_t sz) { |
9557e604 | 670 | void *before, *after; |
e576be50 | 671 | |
9557e604 | 672 | before= *blpp; |
673 | if (!before) return; | |
e576be50 | 674 | after= adns__alloc_final(qu,sz); |
9557e604 | 675 | memcpy(after,before,sz); |
e576be50 | 676 | *blpp= after; |
677 | } |