cachedump.c revision 269257
1/* 2 * daemon/cachedump.c - dump the cache to text format. 3 * 4 * Copyright (c) 2008, NLnet Labs. All rights reserved. 5 * 6 * This software is open source. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * Redistributions of source code must retain the above copyright notice, 13 * this list of conditions and the following disclaimer. 14 * 15 * Redistributions in binary form must reproduce the above copyright notice, 16 * this list of conditions and the following disclaimer in the documentation 17 * and/or other materials provided with the distribution. 18 * 19 * Neither the name of the NLNET LABS nor the names of its contributors may 20 * be used to endorse or promote products derived from this software without 21 * specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 27 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 29 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36/** 37 * \file 38 * 39 * This file contains functions to read and write the cache(s) 40 * to text format. 41 */ 42#include "config.h" 43#include <openssl/ssl.h> 44#include "daemon/cachedump.h" 45#include "daemon/remote.h" 46#include "daemon/worker.h" 47#include "services/cache/rrset.h" 48#include "services/cache/dns.h" 49#include "services/cache/infra.h" 50#include "util/data/msgreply.h" 51#include "util/regional.h" 52#include "util/net_help.h" 53#include "util/data/dname.h" 54#include "iterator/iterator.h" 55#include "iterator/iter_delegpt.h" 56#include "iterator/iter_utils.h" 57#include "iterator/iter_fwd.h" 58#include "iterator/iter_hints.h" 59#include "ldns/sbuffer.h" 60#include "ldns/wire2str.h" 61#include "ldns/str2wire.h" 62 63/** dump one rrset zonefile line */ 64static int 65dump_rrset_line(SSL* ssl, struct ub_packed_rrset_key* k, time_t now, size_t i) 66{ 67 char s[65535]; 68 if(!packed_rr_to_string(k, i, now, s, sizeof(s))) { 69 return ssl_printf(ssl, "BADRR\n"); 70 } 71 return ssl_printf(ssl, "%s", s); 72} 73 74/** dump rrset key and data info */ 75static int 76dump_rrset(SSL* ssl, struct ub_packed_rrset_key* k, 77 struct packed_rrset_data* d, time_t now) 78{ 79 size_t i; 80 /* rd lock held by caller */ 81 if(!k || !d) return 1; 82 if(d->ttl < now) return 1; /* expired */ 83 84 /* meta line */ 85 if(!ssl_printf(ssl, ";rrset%s " ARG_LL "d %u %u %d %d\n", 86 (k->rk.flags & PACKED_RRSET_NSEC_AT_APEX)?" nsec_apex":"", 87 (long long)(d->ttl - now), 88 (unsigned)d->count, (unsigned)d->rrsig_count, 89 (int)d->trust, (int)d->security 90 )) 91 return 0; 92 for(i=0; i<d->count + d->rrsig_count; i++) { 93 if(!dump_rrset_line(ssl, k, now, i)) 94 return 0; 95 } 96 return 1; 97} 98 99/** dump lruhash rrset cache */ 100static int 101dump_rrset_lruhash(SSL* ssl, struct lruhash* h, time_t now) 102{ 103 struct lruhash_entry* e; 104 /* lruhash already locked by caller */ 105 /* walk in order of lru; best first */ 106 for(e=h->lru_start; e; e = e->lru_next) { 107 lock_rw_rdlock(&e->lock); 108 if(!dump_rrset(ssl, (struct ub_packed_rrset_key*)e->key, 109 (struct packed_rrset_data*)e->data, now)) { 110 lock_rw_unlock(&e->lock); 111 return 0; 112 } 113 lock_rw_unlock(&e->lock); 114 } 115 return 1; 116} 117 118/** dump rrset cache */ 119static int 120dump_rrset_cache(SSL* ssl, struct worker* worker) 121{ 122 struct rrset_cache* r = worker->env.rrset_cache; 123 size_t slab; 124 if(!ssl_printf(ssl, "START_RRSET_CACHE\n")) return 0; 125 for(slab=0; slab<r->table.size; slab++) { 126 lock_quick_lock(&r->table.array[slab]->lock); 127 if(!dump_rrset_lruhash(ssl, r->table.array[slab], 128 *worker->env.now)) { 129 lock_quick_unlock(&r->table.array[slab]->lock); 130 return 0; 131 } 132 lock_quick_unlock(&r->table.array[slab]->lock); 133 } 134 return ssl_printf(ssl, "END_RRSET_CACHE\n"); 135} 136 137/** dump message to rrset reference */ 138static int 139dump_msg_ref(SSL* ssl, struct ub_packed_rrset_key* k) 140{ 141 char* nm, *tp, *cl; 142 nm = sldns_wire2str_dname(k->rk.dname, k->rk.dname_len); 143 tp = sldns_wire2str_type(ntohs(k->rk.type)); 144 cl = sldns_wire2str_class(ntohs(k->rk.rrset_class)); 145 if(!nm || !cl || !tp) { 146 free(nm); 147 free(tp); 148 free(cl); 149 return ssl_printf(ssl, "BADREF\n"); 150 } 151 if(!ssl_printf(ssl, "%s %s %s %d\n", nm, cl, tp, (int)k->rk.flags)) { 152 free(nm); 153 free(tp); 154 free(cl); 155 return 0; 156 } 157 free(nm); 158 free(tp); 159 free(cl); 160 161 return 1; 162} 163 164/** dump message entry */ 165static int 166dump_msg(SSL* ssl, struct query_info* k, struct reply_info* d, 167 time_t now) 168{ 169 size_t i; 170 char* nm, *tp, *cl; 171 if(!k || !d) return 1; 172 if(d->ttl < now) return 1; /* expired */ 173 174 nm = sldns_wire2str_dname(k->qname, k->qname_len); 175 tp = sldns_wire2str_type(k->qtype); 176 cl = sldns_wire2str_class(k->qclass); 177 if(!nm || !tp || !cl) { 178 free(nm); 179 free(tp); 180 free(cl); 181 return 1; /* skip this entry */ 182 } 183 if(!rrset_array_lock(d->ref, d->rrset_count, now)) { 184 /* rrsets have timed out or do not exist */ 185 free(nm); 186 free(tp); 187 free(cl); 188 return 1; /* skip this entry */ 189 } 190 191 /* meta line */ 192 if(!ssl_printf(ssl, "msg %s %s %s %d %d " ARG_LL "d %d %u %u %u\n", 193 nm, cl, tp, 194 (int)d->flags, (int)d->qdcount, 195 (long long)(d->ttl-now), (int)d->security, 196 (unsigned)d->an_numrrsets, 197 (unsigned)d->ns_numrrsets, 198 (unsigned)d->ar_numrrsets)) { 199 free(nm); 200 free(tp); 201 free(cl); 202 rrset_array_unlock(d->ref, d->rrset_count); 203 return 0; 204 } 205 free(nm); 206 free(tp); 207 free(cl); 208 209 for(i=0; i<d->rrset_count; i++) { 210 if(!dump_msg_ref(ssl, d->rrsets[i])) { 211 rrset_array_unlock(d->ref, d->rrset_count); 212 return 0; 213 } 214 } 215 rrset_array_unlock(d->ref, d->rrset_count); 216 217 return 1; 218} 219 220/** copy msg to worker pad */ 221static int 222copy_msg(struct regional* region, struct lruhash_entry* e, 223 struct query_info** k, struct reply_info** d) 224{ 225 struct reply_info* rep = (struct reply_info*)e->data; 226 *d = (struct reply_info*)regional_alloc_init(region, e->data, 227 sizeof(struct reply_info) + 228 sizeof(struct rrset_ref) * (rep->rrset_count-1) + 229 sizeof(struct ub_packed_rrset_key*) * rep->rrset_count); 230 if(!*d) 231 return 0; 232 (*d)->rrsets = (struct ub_packed_rrset_key**)(void *)( 233 (uint8_t*)(&((*d)->ref[0])) + 234 sizeof(struct rrset_ref) * rep->rrset_count); 235 *k = (struct query_info*)regional_alloc_init(region, 236 e->key, sizeof(struct query_info)); 237 if(!*k) 238 return 0; 239 (*k)->qname = regional_alloc_init(region, 240 (*k)->qname, (*k)->qname_len); 241 return (*k)->qname != NULL; 242} 243 244/** dump lruhash msg cache */ 245static int 246dump_msg_lruhash(SSL* ssl, struct worker* worker, struct lruhash* h) 247{ 248 struct lruhash_entry* e; 249 struct query_info* k; 250 struct reply_info* d; 251 252 /* lruhash already locked by caller */ 253 /* walk in order of lru; best first */ 254 for(e=h->lru_start; e; e = e->lru_next) { 255 regional_free_all(worker->scratchpad); 256 lock_rw_rdlock(&e->lock); 257 /* make copy of rrset in worker buffer */ 258 if(!copy_msg(worker->scratchpad, e, &k, &d)) { 259 lock_rw_unlock(&e->lock); 260 return 0; 261 } 262 lock_rw_unlock(&e->lock); 263 /* release lock so we can lookup the rrset references 264 * in the rrset cache */ 265 if(!dump_msg(ssl, k, d, *worker->env.now)) { 266 return 0; 267 } 268 } 269 return 1; 270} 271 272/** dump msg cache */ 273static int 274dump_msg_cache(SSL* ssl, struct worker* worker) 275{ 276 struct slabhash* sh = worker->env.msg_cache; 277 size_t slab; 278 if(!ssl_printf(ssl, "START_MSG_CACHE\n")) return 0; 279 for(slab=0; slab<sh->size; slab++) { 280 lock_quick_lock(&sh->array[slab]->lock); 281 if(!dump_msg_lruhash(ssl, worker, sh->array[slab])) { 282 lock_quick_unlock(&sh->array[slab]->lock); 283 return 0; 284 } 285 lock_quick_unlock(&sh->array[slab]->lock); 286 } 287 return ssl_printf(ssl, "END_MSG_CACHE\n"); 288} 289 290int 291dump_cache(SSL* ssl, struct worker* worker) 292{ 293 if(!dump_rrset_cache(ssl, worker)) 294 return 0; 295 if(!dump_msg_cache(ssl, worker)) 296 return 0; 297 return ssl_printf(ssl, "EOF\n"); 298} 299 300/** read a line from ssl into buffer */ 301static int 302ssl_read_buf(SSL* ssl, sldns_buffer* buf) 303{ 304 return ssl_read_line(ssl, (char*)sldns_buffer_begin(buf), 305 sldns_buffer_capacity(buf)); 306} 307 308/** check fixed text on line */ 309static int 310read_fixed(SSL* ssl, sldns_buffer* buf, const char* str) 311{ 312 if(!ssl_read_buf(ssl, buf)) return 0; 313 return (strcmp((char*)sldns_buffer_begin(buf), str) == 0); 314} 315 316/** load an RR into rrset */ 317static int 318load_rr(SSL* ssl, sldns_buffer* buf, struct regional* region, 319 struct ub_packed_rrset_key* rk, struct packed_rrset_data* d, 320 unsigned int i, int is_rrsig, int* go_on, time_t now) 321{ 322 uint8_t rr[LDNS_RR_BUF_SIZE]; 323 size_t rr_len = sizeof(rr), dname_len = 0; 324 int status; 325 326 /* read the line */ 327 if(!ssl_read_buf(ssl, buf)) 328 return 0; 329 if(strncmp((char*)sldns_buffer_begin(buf), "BADRR\n", 6) == 0) { 330 *go_on = 0; 331 return 1; 332 } 333 status = sldns_str2wire_rr_buf((char*)sldns_buffer_begin(buf), rr, 334 &rr_len, &dname_len, 3600, NULL, 0, NULL, 0); 335 if(status != 0) { 336 log_warn("error cannot parse rr: %s: %s", 337 sldns_get_errorstr_parse(status), 338 (char*)sldns_buffer_begin(buf)); 339 return 0; 340 } 341 if(is_rrsig && sldns_wirerr_get_type(rr, rr_len, dname_len) 342 != LDNS_RR_TYPE_RRSIG) { 343 log_warn("error expected rrsig but got %s", 344 (char*)sldns_buffer_begin(buf)); 345 return 0; 346 } 347 348 /* convert ldns rr into packed_rr */ 349 d->rr_ttl[i] = (time_t)sldns_wirerr_get_ttl(rr, rr_len, dname_len) + now; 350 sldns_buffer_clear(buf); 351 d->rr_len[i] = sldns_wirerr_get_rdatalen(rr, rr_len, dname_len)+2; 352 d->rr_data[i] = (uint8_t*)regional_alloc_init(region, 353 sldns_wirerr_get_rdatawl(rr, rr_len, dname_len), d->rr_len[i]); 354 if(!d->rr_data[i]) { 355 log_warn("error out of memory"); 356 return 0; 357 } 358 359 /* if first entry, fill the key structure */ 360 if(i==0) { 361 rk->rk.type = htons(sldns_wirerr_get_type(rr, rr_len, dname_len)); 362 rk->rk.rrset_class = htons(sldns_wirerr_get_class(rr, rr_len, dname_len)); 363 rk->rk.dname_len = dname_len; 364 rk->rk.dname = regional_alloc_init(region, rr, dname_len); 365 if(!rk->rk.dname) { 366 log_warn("error out of memory"); 367 return 0; 368 } 369 } 370 371 return 1; 372} 373 374/** move entry into cache */ 375static int 376move_into_cache(struct ub_packed_rrset_key* k, 377 struct packed_rrset_data* d, struct worker* worker) 378{ 379 struct ub_packed_rrset_key* ak; 380 struct packed_rrset_data* ad; 381 size_t s, i, num = d->count + d->rrsig_count; 382 struct rrset_ref ref; 383 uint8_t* p; 384 385 ak = alloc_special_obtain(&worker->alloc); 386 if(!ak) { 387 log_warn("error out of memory"); 388 return 0; 389 } 390 ak->entry.data = NULL; 391 ak->rk = k->rk; 392 ak->entry.hash = rrset_key_hash(&k->rk); 393 ak->rk.dname = (uint8_t*)memdup(k->rk.dname, k->rk.dname_len); 394 if(!ak->rk.dname) { 395 log_warn("error out of memory"); 396 ub_packed_rrset_parsedelete(ak, &worker->alloc); 397 return 0; 398 } 399 s = sizeof(*ad) + (sizeof(size_t) + sizeof(uint8_t*) + 400 sizeof(time_t))* num; 401 for(i=0; i<num; i++) 402 s += d->rr_len[i]; 403 ad = (struct packed_rrset_data*)malloc(s); 404 if(!ad) { 405 log_warn("error out of memory"); 406 ub_packed_rrset_parsedelete(ak, &worker->alloc); 407 return 0; 408 } 409 p = (uint8_t*)ad; 410 memmove(p, d, sizeof(*ad)); 411 p += sizeof(*ad); 412 memmove(p, &d->rr_len[0], sizeof(size_t)*num); 413 p += sizeof(size_t)*num; 414 memmove(p, &d->rr_data[0], sizeof(uint8_t*)*num); 415 p += sizeof(uint8_t*)*num; 416 memmove(p, &d->rr_ttl[0], sizeof(time_t)*num); 417 p += sizeof(time_t)*num; 418 for(i=0; i<num; i++) { 419 memmove(p, d->rr_data[i], d->rr_len[i]); 420 p += d->rr_len[i]; 421 } 422 packed_rrset_ptr_fixup(ad); 423 424 ak->entry.data = ad; 425 426 ref.key = ak; 427 ref.id = ak->id; 428 (void)rrset_cache_update(worker->env.rrset_cache, &ref, 429 &worker->alloc, *worker->env.now); 430 return 1; 431} 432 433/** load an rrset entry */ 434static int 435load_rrset(SSL* ssl, sldns_buffer* buf, struct worker* worker) 436{ 437 char* s = (char*)sldns_buffer_begin(buf); 438 struct regional* region = worker->scratchpad; 439 struct ub_packed_rrset_key* rk; 440 struct packed_rrset_data* d; 441 unsigned int rr_count, rrsig_count, trust, security; 442 long long ttl; 443 unsigned int i; 444 int go_on = 1; 445 regional_free_all(region); 446 447 rk = (struct ub_packed_rrset_key*)regional_alloc_zero(region, 448 sizeof(*rk)); 449 d = (struct packed_rrset_data*)regional_alloc_zero(region, sizeof(*d)); 450 if(!rk || !d) { 451 log_warn("error out of memory"); 452 return 0; 453 } 454 455 if(strncmp(s, ";rrset", 6) != 0) { 456 log_warn("error expected ';rrset' but got %s", s); 457 return 0; 458 } 459 s += 6; 460 if(strncmp(s, " nsec_apex", 10) == 0) { 461 s += 10; 462 rk->rk.flags |= PACKED_RRSET_NSEC_AT_APEX; 463 } 464 if(sscanf(s, " " ARG_LL "d %u %u %u %u", &ttl, &rr_count, &rrsig_count, 465 &trust, &security) != 5) { 466 log_warn("error bad rrset spec %s", s); 467 return 0; 468 } 469 if(rr_count == 0 && rrsig_count == 0) { 470 log_warn("bad rrset without contents"); 471 return 0; 472 } 473 d->count = (size_t)rr_count; 474 d->rrsig_count = (size_t)rrsig_count; 475 d->security = (enum sec_status)security; 476 d->trust = (enum rrset_trust)trust; 477 d->ttl = (time_t)ttl + *worker->env.now; 478 479 d->rr_len = regional_alloc_zero(region, 480 sizeof(size_t)*(d->count+d->rrsig_count)); 481 d->rr_ttl = regional_alloc_zero(region, 482 sizeof(time_t)*(d->count+d->rrsig_count)); 483 d->rr_data = regional_alloc_zero(region, 484 sizeof(uint8_t*)*(d->count+d->rrsig_count)); 485 if(!d->rr_len || !d->rr_ttl || !d->rr_data) { 486 log_warn("error out of memory"); 487 return 0; 488 } 489 490 /* read the rr's themselves */ 491 for(i=0; i<rr_count; i++) { 492 if(!load_rr(ssl, buf, region, rk, d, i, 0, 493 &go_on, *worker->env.now)) { 494 log_warn("could not read rr %u", i); 495 return 0; 496 } 497 } 498 for(i=0; i<rrsig_count; i++) { 499 if(!load_rr(ssl, buf, region, rk, d, i+rr_count, 1, 500 &go_on, *worker->env.now)) { 501 log_warn("could not read rrsig %u", i); 502 return 0; 503 } 504 } 505 if(!go_on) { 506 /* skip this entry */ 507 return 1; 508 } 509 510 return move_into_cache(rk, d, worker); 511} 512 513/** load rrset cache */ 514static int 515load_rrset_cache(SSL* ssl, struct worker* worker) 516{ 517 sldns_buffer* buf = worker->env.scratch_buffer; 518 if(!read_fixed(ssl, buf, "START_RRSET_CACHE")) return 0; 519 while(ssl_read_buf(ssl, buf) && 520 strcmp((char*)sldns_buffer_begin(buf), "END_RRSET_CACHE")!=0) { 521 if(!load_rrset(ssl, buf, worker)) 522 return 0; 523 } 524 return 1; 525} 526 527/** read qinfo from next three words */ 528static char* 529load_qinfo(char* str, struct query_info* qinfo, struct regional* region) 530{ 531 /* s is part of the buf */ 532 char* s = str; 533 uint8_t rr[LDNS_RR_BUF_SIZE]; 534 size_t rr_len = sizeof(rr), dname_len = 0; 535 int status; 536 537 /* skip three words */ 538 s = strchr(str, ' '); 539 if(s) s = strchr(s+1, ' '); 540 if(s) s = strchr(s+1, ' '); 541 if(!s) { 542 log_warn("error line too short, %s", str); 543 return NULL; 544 } 545 s[0] = 0; 546 s++; 547 548 /* parse them */ 549 status = sldns_str2wire_rr_question_buf(str, rr, &rr_len, &dname_len, 550 NULL, 0, NULL, 0); 551 if(status != 0) { 552 log_warn("error cannot parse: %s %s", 553 sldns_get_errorstr_parse(status), str); 554 return NULL; 555 } 556 qinfo->qtype = sldns_wirerr_get_type(rr, rr_len, dname_len); 557 qinfo->qclass = sldns_wirerr_get_class(rr, rr_len, dname_len); 558 qinfo->qname_len = dname_len; 559 qinfo->qname = (uint8_t*)regional_alloc_init(region, rr, dname_len); 560 if(!qinfo->qname) { 561 log_warn("error out of memory"); 562 return NULL; 563 } 564 565 return s; 566} 567 568/** load a msg rrset reference */ 569static int 570load_ref(SSL* ssl, sldns_buffer* buf, struct worker* worker, 571 struct regional *region, struct ub_packed_rrset_key** rrset, 572 int* go_on) 573{ 574 char* s = (char*)sldns_buffer_begin(buf); 575 struct query_info qinfo; 576 unsigned int flags; 577 struct ub_packed_rrset_key* k; 578 579 /* read line */ 580 if(!ssl_read_buf(ssl, buf)) 581 return 0; 582 if(strncmp(s, "BADREF", 6) == 0) { 583 *go_on = 0; /* its bad, skip it and skip message */ 584 return 1; 585 } 586 587 s = load_qinfo(s, &qinfo, region); 588 if(!s) { 589 return 0; 590 } 591 if(sscanf(s, " %u", &flags) != 1) { 592 log_warn("error cannot parse flags: %s", s); 593 return 0; 594 } 595 596 /* lookup in cache */ 597 k = rrset_cache_lookup(worker->env.rrset_cache, qinfo.qname, 598 qinfo.qname_len, qinfo.qtype, qinfo.qclass, 599 (uint32_t)flags, *worker->env.now, 0); 600 if(!k) { 601 /* not found or expired */ 602 *go_on = 0; 603 return 1; 604 } 605 606 /* store in result */ 607 *rrset = packed_rrset_copy_region(k, region, *worker->env.now); 608 lock_rw_unlock(&k->entry.lock); 609 610 return (*rrset != NULL); 611} 612 613/** load a msg entry */ 614static int 615load_msg(SSL* ssl, sldns_buffer* buf, struct worker* worker) 616{ 617 struct regional* region = worker->scratchpad; 618 struct query_info qinf; 619 struct reply_info rep; 620 char* s = (char*)sldns_buffer_begin(buf); 621 unsigned int flags, qdcount, security, an, ns, ar; 622 long long ttl; 623 size_t i; 624 int go_on = 1; 625 626 regional_free_all(region); 627 628 if(strncmp(s, "msg ", 4) != 0) { 629 log_warn("error expected msg but got %s", s); 630 return 0; 631 } 632 s += 4; 633 s = load_qinfo(s, &qinf, region); 634 if(!s) { 635 return 0; 636 } 637 638 /* read remainder of line */ 639 if(sscanf(s, " %u %u " ARG_LL "d %u %u %u %u", &flags, &qdcount, &ttl, 640 &security, &an, &ns, &ar) != 7) { 641 log_warn("error cannot parse numbers: %s", s); 642 return 0; 643 } 644 rep.flags = (uint16_t)flags; 645 rep.qdcount = (uint16_t)qdcount; 646 rep.ttl = (time_t)ttl; 647 rep.prefetch_ttl = PREFETCH_TTL_CALC(rep.ttl); 648 rep.security = (enum sec_status)security; 649 rep.an_numrrsets = (size_t)an; 650 rep.ns_numrrsets = (size_t)ns; 651 rep.ar_numrrsets = (size_t)ar; 652 rep.rrset_count = (size_t)an+(size_t)ns+(size_t)ar; 653 rep.rrsets = (struct ub_packed_rrset_key**)regional_alloc_zero( 654 region, sizeof(struct ub_packed_rrset_key*)*rep.rrset_count); 655 656 /* fill repinfo with references */ 657 for(i=0; i<rep.rrset_count; i++) { 658 if(!load_ref(ssl, buf, worker, region, &rep.rrsets[i], 659 &go_on)) { 660 return 0; 661 } 662 } 663 664 if(!go_on) 665 return 1; /* skip this one, not all references satisfied */ 666 667 if(!dns_cache_store(&worker->env, &qinf, &rep, 0, 0, 0, NULL)) { 668 log_warn("error out of memory"); 669 return 0; 670 } 671 return 1; 672} 673 674/** load msg cache */ 675static int 676load_msg_cache(SSL* ssl, struct worker* worker) 677{ 678 sldns_buffer* buf = worker->env.scratch_buffer; 679 if(!read_fixed(ssl, buf, "START_MSG_CACHE")) return 0; 680 while(ssl_read_buf(ssl, buf) && 681 strcmp((char*)sldns_buffer_begin(buf), "END_MSG_CACHE")!=0) { 682 if(!load_msg(ssl, buf, worker)) 683 return 0; 684 } 685 return 1; 686} 687 688int 689load_cache(SSL* ssl, struct worker* worker) 690{ 691 if(!load_rrset_cache(ssl, worker)) 692 return 0; 693 if(!load_msg_cache(ssl, worker)) 694 return 0; 695 return read_fixed(ssl, worker->env.scratch_buffer, "EOF"); 696} 697 698/** print details on a delegation point */ 699static void 700print_dp_details(SSL* ssl, struct worker* worker, struct delegpt* dp) 701{ 702 char buf[257]; 703 struct delegpt_addr* a; 704 int lame, dlame, rlame, rto, edns_vs, to, delay, 705 tA = 0, tAAAA = 0, tother = 0; 706 long long entry_ttl; 707 struct rtt_info ri; 708 uint8_t edns_lame_known; 709 for(a = dp->target_list; a; a = a->next_target) { 710 addr_to_str(&a->addr, a->addrlen, buf, sizeof(buf)); 711 if(!ssl_printf(ssl, "%-16s\t", buf)) 712 return; 713 if(a->bogus) { 714 if(!ssl_printf(ssl, "Address is BOGUS. ")) 715 return; 716 } 717 /* lookup in infra cache */ 718 delay=0; 719 entry_ttl = infra_get_host_rto(worker->env.infra_cache, 720 &a->addr, a->addrlen, dp->name, dp->namelen, 721 &ri, &delay, *worker->env.now, &tA, &tAAAA, &tother); 722 if(entry_ttl == -2 && ri.rto >= USEFUL_SERVER_TOP_TIMEOUT) { 723 if(!ssl_printf(ssl, "expired, rto %d msec, tA %d " 724 "tAAAA %d tother %d.\n", ri.rto, tA, tAAAA, 725 tother)) 726 return; 727 continue; 728 } 729 if(entry_ttl == -1 || entry_ttl == -2) { 730 if(!ssl_printf(ssl, "not in infra cache.\n")) 731 return; 732 continue; /* skip stuff not in infra cache */ 733 } 734 735 /* uses type_A because most often looked up, but other 736 * lameness won't be reported then */ 737 if(!infra_get_lame_rtt(worker->env.infra_cache, 738 &a->addr, a->addrlen, dp->name, dp->namelen, 739 LDNS_RR_TYPE_A, &lame, &dlame, &rlame, &rto, 740 *worker->env.now)) { 741 if(!ssl_printf(ssl, "not in infra cache.\n")) 742 return; 743 continue; /* skip stuff not in infra cache */ 744 } 745 if(!ssl_printf(ssl, "%s%s%s%srto %d msec, ttl " ARG_LL "d, " 746 "ping %d var %d rtt %d, tA %d, tAAAA %d, tother %d", 747 lame?"LAME ":"", dlame?"NoDNSSEC ":"", 748 a->lame?"AddrWasParentSide ":"", 749 rlame?"NoAuthButRecursive ":"", rto, entry_ttl, 750 ri.srtt, ri.rttvar, rtt_notimeout(&ri), 751 tA, tAAAA, tother)) 752 return; 753 if(delay) 754 if(!ssl_printf(ssl, ", probedelay %d", delay)) 755 return; 756 if(infra_host(worker->env.infra_cache, &a->addr, a->addrlen, 757 dp->name, dp->namelen, *worker->env.now, &edns_vs, 758 &edns_lame_known, &to)) { 759 if(edns_vs == -1) { 760 if(!ssl_printf(ssl, ", noEDNS%s.", 761 edns_lame_known?" probed":" assumed")) 762 return; 763 } else { 764 if(!ssl_printf(ssl, ", EDNS %d%s.", edns_vs, 765 edns_lame_known?" probed":" assumed")) 766 return; 767 } 768 } 769 if(!ssl_printf(ssl, "\n")) 770 return; 771 } 772} 773 774/** print main dp info */ 775static void 776print_dp_main(SSL* ssl, struct delegpt* dp, struct dns_msg* msg) 777{ 778 size_t i, n_ns, n_miss, n_addr, n_res, n_avail; 779 780 /* print the dp */ 781 if(msg) 782 for(i=0; i<msg->rep->rrset_count; i++) { 783 struct ub_packed_rrset_key* k = msg->rep->rrsets[i]; 784 struct packed_rrset_data* d = 785 (struct packed_rrset_data*)k->entry.data; 786 if(d->security == sec_status_bogus) { 787 if(!ssl_printf(ssl, "Address is BOGUS:\n")) 788 return; 789 } 790 if(!dump_rrset(ssl, k, d, 0)) 791 return; 792 } 793 delegpt_count_ns(dp, &n_ns, &n_miss); 794 delegpt_count_addr(dp, &n_addr, &n_res, &n_avail); 795 /* since dp has not been used by iterator, all are available*/ 796 if(!ssl_printf(ssl, "Delegation with %d names, of which %d " 797 "can be examined to query further addresses.\n" 798 "%sIt provides %d IP addresses.\n", 799 (int)n_ns, (int)n_miss, (dp->bogus?"It is BOGUS. ":""), 800 (int)n_addr)) 801 return; 802} 803 804int print_deleg_lookup(SSL* ssl, struct worker* worker, uint8_t* nm, 805 size_t nmlen, int ATTR_UNUSED(nmlabs)) 806{ 807 /* deep links into the iterator module */ 808 struct delegpt* dp; 809 struct dns_msg* msg; 810 struct regional* region = worker->scratchpad; 811 char b[260]; 812 struct query_info qinfo; 813 struct iter_hints_stub* stub; 814 regional_free_all(region); 815 qinfo.qname = nm; 816 qinfo.qname_len = nmlen; 817 qinfo.qtype = LDNS_RR_TYPE_A; 818 qinfo.qclass = LDNS_RR_CLASS_IN; 819 820 dname_str(nm, b); 821 if(!ssl_printf(ssl, "The following name servers are used for lookup " 822 "of %s\n", b)) 823 return 0; 824 825 dp = forwards_lookup(worker->env.fwds, nm, qinfo.qclass); 826 if(dp) { 827 if(!ssl_printf(ssl, "forwarding request:\n")) 828 return 0; 829 print_dp_main(ssl, dp, NULL); 830 print_dp_details(ssl, worker, dp); 831 return 1; 832 } 833 834 while(1) { 835 dp = dns_cache_find_delegation(&worker->env, nm, nmlen, 836 qinfo.qtype, qinfo.qclass, region, &msg, 837 *worker->env.now); 838 if(!dp) { 839 return ssl_printf(ssl, "no delegation from " 840 "cache; goes to configured roots\n"); 841 } 842 /* go up? */ 843 if(iter_dp_is_useless(&qinfo, BIT_RD, dp)) { 844 print_dp_main(ssl, dp, msg); 845 print_dp_details(ssl, worker, dp); 846 if(!ssl_printf(ssl, "cache delegation was " 847 "useless (no IP addresses)\n")) 848 return 0; 849 if(dname_is_root(nm)) { 850 /* goes to root config */ 851 return ssl_printf(ssl, "no delegation from " 852 "cache; goes to configured roots\n"); 853 } else { 854 /* useless, goes up */ 855 nm = dp->name; 856 nmlen = dp->namelen; 857 dname_remove_label(&nm, &nmlen); 858 dname_str(nm, b); 859 if(!ssl_printf(ssl, "going up, lookup %s\n", b)) 860 return 0; 861 continue; 862 } 863 } 864 stub = hints_lookup_stub(worker->env.hints, nm, qinfo.qclass, 865 dp); 866 if(stub) { 867 if(stub->noprime) { 868 if(!ssl_printf(ssl, "The noprime stub servers " 869 "are used:\n")) 870 return 0; 871 } else { 872 if(!ssl_printf(ssl, "The stub is primed " 873 "with servers:\n")) 874 return 0; 875 } 876 print_dp_main(ssl, stub->dp, NULL); 877 print_dp_details(ssl, worker, stub->dp); 878 } else { 879 print_dp_main(ssl, dp, msg); 880 print_dp_details(ssl, worker, dp); 881 } 882 break; 883 } 884 885 return 1; 886} 887