contrib/unbound/daemon/cachedump.c

   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 */
  64 static int
  65 dump_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 */
  75 static int
  76 dump_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 */
 100 static int
 101 dump_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 */
 119 static int
 120 dump_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 */
 138 static int
 139 dump_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 */
 165 static int
 166 dump_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 */
 221 static int
 222 copy_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 */
 245 static int
 246 dump_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 */
 273 static int
 274 dump_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
 290 int
 291 dump_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 */
 301 static int
 302 ssl_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 */
 309 static int
 310 read_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 */
 317 static int
 318 load_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 */
 375 static int
 376 move_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 */
 434 static int
 435 load_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 */
 514 static int
 515 load_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 */
 528 static char*
 529 load_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 */
 569 static int
 570 load_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 */
 614 static int
 615 load_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, flags)) {
 668                 log_warn("error out of memory");
 669                 return 0;
 670         }
 671         return 1;
 672 }
 673
 674 /** load msg cache */
 675 static int
 676 load_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
 688 int
 689 load_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 */
 699 static void
 700 print_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 */
 775 static void
 776 print_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
 804 int 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 }