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 "sldns/sbuffer.h"
  60 #include "sldns/wire2str.h"
  61 #include "sldns/str2wire.h"
  62
  63 /** dump one rrset zonefile line */
  64 static int
  65 dump_rrset_line(RES* 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(RES* 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(k->id == 0) return 1; /* deleted */
  83         if(d->ttl < now) return 1; /* expired */
  84
  85         /* meta line */
  86         if(!ssl_printf(ssl, ";rrset%s " ARG_LL "d %u %u %d %d\n",
  87                 (k->rk.flags & PACKED_RRSET_NSEC_AT_APEX)?" nsec_apex":"",
  88                 (long long)(d->ttl - now),
  89                 (unsigned)d->count, (unsigned)d->rrsig_count,
  90                 (int)d->trust, (int)d->security
  91                 ))
  92                 return 0;
  93         for(i=0; i<d->count + d->rrsig_count; i++) {
  94                 if(!dump_rrset_line(ssl, k, now, i))
  95                         return 0;
  96         }
  97         return 1;
  98 }
  99
 100 /** dump lruhash rrset cache */
 101 static int
 102 dump_rrset_lruhash(RES* ssl, struct lruhash* h, time_t now)
 103 {
 104         struct lruhash_entry* e;
 105         /* lruhash already locked by caller */
 106         /* walk in order of lru; best first */
 107         for(e=h->lru_start; e; e = e->lru_next) {
 108                 lock_rw_rdlock(&e->lock);
 109                 if(!dump_rrset(ssl, (struct ub_packed_rrset_key*)e->key,
 110                         (struct packed_rrset_data*)e->data, now)) {
 111                         lock_rw_unlock(&e->lock);
 112                         return 0;
 113                 }
 114                 lock_rw_unlock(&e->lock);
 115         }
 116         return 1;
 117 }
 118
 119 /** dump rrset cache */
 120 static int
 121 dump_rrset_cache(RES* ssl, struct worker* worker)
 122 {
 123         struct rrset_cache* r = worker->env.rrset_cache;
 124         size_t slab;
 125         if(!ssl_printf(ssl, "START_RRSET_CACHE\n")) return 0;
 126         for(slab=0; slab<r->table.size; slab++) {
 127                 lock_quick_lock(&r->table.array[slab]->lock);
 128                 if(!dump_rrset_lruhash(ssl, r->table.array[slab],
 129                         *worker->env.now)) {
 130                         lock_quick_unlock(&r->table.array[slab]->lock);
 131                         return 0;
 132                 }
 133                 lock_quick_unlock(&r->table.array[slab]->lock);
 134         }
 135         return ssl_printf(ssl, "END_RRSET_CACHE\n");
 136 }
 137
 138 /** dump message to rrset reference */
 139 static int
 140 dump_msg_ref(RES* ssl, struct ub_packed_rrset_key* k)
 141 {
 142         char* nm, *tp, *cl;
 143         nm = sldns_wire2str_dname(k->rk.dname, k->rk.dname_len);
 144         tp = sldns_wire2str_type(ntohs(k->rk.type));
 145         cl = sldns_wire2str_class(ntohs(k->rk.rrset_class));
 146         if(!nm || !cl || !tp) {
 147                 free(nm);
 148                 free(tp);
 149                 free(cl);
 150                 return ssl_printf(ssl, "BADREF\n");
 151         }
 152         if(!ssl_printf(ssl, "%s %s %s %d\n", nm, cl, tp, (int)k->rk.flags)) {
 153                 free(nm);
 154                 free(tp);
 155                 free(cl);
 156                 return 0;
 157         }
 158         free(nm);
 159         free(tp);
 160         free(cl);
 161
 162         return 1;
 163 }
 164
 165 /** dump message entry */
 166 static int
 167 dump_msg(RES* ssl, struct query_info* k, struct reply_info* d,
 168         time_t now)
 169 {
 170         size_t i;
 171         char* nm, *tp, *cl;
 172         if(!k || !d) return 1;
 173         if(d->ttl < now) return 1; /* expired */
 174
 175         nm = sldns_wire2str_dname(k->qname, k->qname_len);
 176         tp = sldns_wire2str_type(k->qtype);
 177         cl = sldns_wire2str_class(k->qclass);
 178         if(!nm || !tp || !cl) {
 179                 free(nm);
 180                 free(tp);
 181                 free(cl);
 182                 return 1; /* skip this entry */
 183         }
 184         if(!rrset_array_lock(d->ref, d->rrset_count, now)) {
 185                 /* rrsets have timed out or do not exist */
 186                 free(nm);
 187                 free(tp);
 188                 free(cl);
 189                 return 1; /* skip this entry */
 190         }
 191
 192         /* meta line */
 193         if(!ssl_printf(ssl, "msg %s %s %s %d %d " ARG_LL "d %d %u %u %u\n",
 194                         nm, cl, tp,
 195                         (int)d->flags, (int)d->qdcount,
 196                         (long long)(d->ttl-now), (int)d->security,
 197                         (unsigned)d->an_numrrsets,
 198                         (unsigned)d->ns_numrrsets,
 199                         (unsigned)d->ar_numrrsets)) {
 200                 free(nm);
 201                 free(tp);
 202                 free(cl);
 203                 rrset_array_unlock(d->ref, d->rrset_count);
 204                 return 0;
 205         }
 206         free(nm);
 207         free(tp);
 208         free(cl);
 209
 210         for(i=0; i<d->rrset_count; i++) {
 211                 if(!dump_msg_ref(ssl, d->rrsets[i])) {
 212                         rrset_array_unlock(d->ref, d->rrset_count);
 213                         return 0;
 214                 }
 215         }
 216         rrset_array_unlock(d->ref, d->rrset_count);
 217
 218         return 1;
 219 }
 220
 221 /** copy msg to worker pad */
 222 static int
 223 copy_msg(struct regional* region, struct lruhash_entry* e,
 224         struct query_info** k, struct reply_info** d)
 225 {
 226         struct reply_info* rep = (struct reply_info*)e->data;
 227         if(rep->rrset_count > RR_COUNT_MAX)
 228                 return 0; /* to protect against integer overflow */
 229         *d = (struct reply_info*)regional_alloc_init(region, e->data,
 230                 sizeof(struct reply_info) +
 231                 sizeof(struct rrset_ref) * (rep->rrset_count-1) +
 232                 sizeof(struct ub_packed_rrset_key*) * rep->rrset_count);
 233         if(!*d)
 234                 return 0;
 235         (*d)->rrsets = (struct ub_packed_rrset_key**)(void *)(
 236                 (uint8_t*)(&((*d)->ref[0])) +
 237                 sizeof(struct rrset_ref) * rep->rrset_count);
 238         *k = (struct query_info*)regional_alloc_init(region,
 239                 e->key, sizeof(struct query_info));
 240         if(!*k)
 241                 return 0;
 242         (*k)->qname = regional_alloc_init(region,
 243                 (*k)->qname, (*k)->qname_len);
 244         return (*k)->qname != NULL;
 245 }
 246
 247 /** dump lruhash msg cache */
 248 static int
 249 dump_msg_lruhash(RES* ssl, struct worker* worker, struct lruhash* h)
 250 {
 251         struct lruhash_entry* e;
 252         struct query_info* k;
 253         struct reply_info* d;
 254
 255         /* lruhash already locked by caller */
 256         /* walk in order of lru; best first */
 257         for(e=h->lru_start; e; e = e->lru_next) {
 258                 regional_free_all(worker->scratchpad);
 259                 lock_rw_rdlock(&e->lock);
 260                 /* make copy of rrset in worker buffer */
 261                 if(!copy_msg(worker->scratchpad, e, &k, &d)) {
 262                         lock_rw_unlock(&e->lock);
 263                         return 0;
 264                 }
 265                 lock_rw_unlock(&e->lock);
 266                 /* release lock so we can lookup the rrset references
 267                  * in the rrset cache */
 268                 if(!dump_msg(ssl, k, d, *worker->env.now)) {
 269                         return 0;
 270                 }
 271         }
 272         return 1;
 273 }
 274
 275 /** dump msg cache */
 276 static int
 277 dump_msg_cache(RES* ssl, struct worker* worker)
 278 {
 279         struct slabhash* sh = worker->env.msg_cache;
 280         size_t slab;
 281         if(!ssl_printf(ssl, "START_MSG_CACHE\n")) return 0;
 282         for(slab=0; slab<sh->size; slab++) {
 283                 lock_quick_lock(&sh->array[slab]->lock);
 284                 if(!dump_msg_lruhash(ssl, worker, sh->array[slab])) {
 285                         lock_quick_unlock(&sh->array[slab]->lock);
 286                         return 0;
 287                 }
 288                 lock_quick_unlock(&sh->array[slab]->lock);
 289         }
 290         return ssl_printf(ssl, "END_MSG_CACHE\n");
 291 }
 292
 293 int
 294 dump_cache(RES* ssl, struct worker* worker)
 295 {
 296         if(!dump_rrset_cache(ssl, worker))
 297                 return 0;
 298         if(!dump_msg_cache(ssl, worker))
 299                 return 0;
 300         return ssl_printf(ssl, "EOF\n");
 301 }
 302
 303 /** read a line from ssl into buffer */
 304 static int
 305 ssl_read_buf(RES* ssl, sldns_buffer* buf)
 306 {
 307         return ssl_read_line(ssl, (char*)sldns_buffer_begin(buf),
 308                 sldns_buffer_capacity(buf));
 309 }
 310
 311 /** check fixed text on line */
 312 static int
 313 read_fixed(RES* ssl, sldns_buffer* buf, const char* str)
 314 {
 315         if(!ssl_read_buf(ssl, buf)) return 0;
 316         return (strcmp((char*)sldns_buffer_begin(buf), str) == 0);
 317 }
 318
 319 /** load an RR into rrset */
 320 static int
 321 load_rr(RES* ssl, sldns_buffer* buf, struct regional* region,
 322         struct ub_packed_rrset_key* rk, struct packed_rrset_data* d,
 323         unsigned int i, int is_rrsig, int* go_on, time_t now)
 324 {
 325         uint8_t rr[LDNS_RR_BUF_SIZE];
 326         size_t rr_len = sizeof(rr), dname_len = 0;
 327         int status;
 328
 329         /* read the line */
 330         if(!ssl_read_buf(ssl, buf))
 331                 return 0;
 332         if(strncmp((char*)sldns_buffer_begin(buf), "BADRR\n", 6) == 0) {
 333                 *go_on = 0;
 334                 return 1;
 335         }
 336         status = sldns_str2wire_rr_buf((char*)sldns_buffer_begin(buf), rr,
 337                 &rr_len, &dname_len, 3600, NULL, 0, NULL, 0);
 338         if(status != 0) {
 339                 log_warn("error cannot parse rr: %s: %s",
 340                         sldns_get_errorstr_parse(status),
 341                         (char*)sldns_buffer_begin(buf));
 342                 return 0;
 343         }
 344         if(is_rrsig && sldns_wirerr_get_type(rr, rr_len, dname_len)
 345                 != LDNS_RR_TYPE_RRSIG) {
 346                 log_warn("error expected rrsig but got %s",
 347                         (char*)sldns_buffer_begin(buf));
 348                 return 0;
 349         }
 350
 351         /* convert ldns rr into packed_rr */
 352         d->rr_ttl[i] = (time_t)sldns_wirerr_get_ttl(rr, rr_len, dname_len) + now;
 353         sldns_buffer_clear(buf);
 354         d->rr_len[i] = sldns_wirerr_get_rdatalen(rr, rr_len, dname_len)+2;
 355         d->rr_data[i] = (uint8_t*)regional_alloc_init(region,
 356                 sldns_wirerr_get_rdatawl(rr, rr_len, dname_len), d->rr_len[i]);
 357         if(!d->rr_data[i]) {
 358                 log_warn("error out of memory");
 359                 return 0;
 360         }
 361
 362         /* if first entry, fill the key structure */
 363         if(i==0) {
 364                 rk->rk.type = htons(sldns_wirerr_get_type(rr, rr_len, dname_len));
 365                 rk->rk.rrset_class = htons(sldns_wirerr_get_class(rr, rr_len, dname_len));
 366                 rk->rk.dname_len = dname_len;
 367                 rk->rk.dname = regional_alloc_init(region, rr, dname_len);
 368                 if(!rk->rk.dname) {
 369                         log_warn("error out of memory");
 370                         return 0;
 371                 }
 372         }
 373
 374         return 1;
 375 }
 376
 377 /** move entry into cache */
 378 static int
 379 move_into_cache(struct ub_packed_rrset_key* k,
 380         struct packed_rrset_data* d, struct worker* worker)
 381 {
 382         struct ub_packed_rrset_key* ak;
 383         struct packed_rrset_data* ad;
 384         size_t s, i, num = d->count + d->rrsig_count;
 385         struct rrset_ref ref;
 386         uint8_t* p;
 387
 388         ak = alloc_special_obtain(&worker->alloc);
 389         if(!ak) {
 390                 log_warn("error out of memory");
 391                 return 0;
 392         }
 393         ak->entry.data = NULL;
 394         ak->rk = k->rk;
 395         ak->entry.hash = rrset_key_hash(&k->rk);
 396         ak->rk.dname = (uint8_t*)memdup(k->rk.dname, k->rk.dname_len);
 397         if(!ak->rk.dname) {
 398                 log_warn("error out of memory");
 399                 ub_packed_rrset_parsedelete(ak, &worker->alloc);
 400                 return 0;
 401         }
 402         s = sizeof(*ad) + (sizeof(size_t) + sizeof(uint8_t*) +
 403                 sizeof(time_t))* num;
 404         for(i=0; i<num; i++)
 405                 s += d->rr_len[i];
 406         ad = (struct packed_rrset_data*)malloc(s);
 407         if(!ad) {
 408                 log_warn("error out of memory");
 409                 ub_packed_rrset_parsedelete(ak, &worker->alloc);
 410                 return 0;
 411         }
 412         p = (uint8_t*)ad;
 413         memmove(p, d, sizeof(*ad));
 414         p += sizeof(*ad);
 415         memmove(p, &d->rr_len[0], sizeof(size_t)*num);
 416         p += sizeof(size_t)*num;
 417         memmove(p, &d->rr_data[0], sizeof(uint8_t*)*num);
 418         p += sizeof(uint8_t*)*num;
 419         memmove(p, &d->rr_ttl[0], sizeof(time_t)*num);
 420         p += sizeof(time_t)*num;
 421         for(i=0; i<num; i++) {
 422                 memmove(p, d->rr_data[i], d->rr_len[i]);
 423                 p += d->rr_len[i];
 424         }
 425         packed_rrset_ptr_fixup(ad);
 426
 427         ak->entry.data = ad;
 428
 429         ref.key = ak;
 430         ref.id = ak->id;
 431         (void)rrset_cache_update(worker->env.rrset_cache, &ref,
 432                 &worker->alloc, *worker->env.now);
 433         return 1;
 434 }
 435
 436 /** load an rrset entry */
 437 static int
 438 load_rrset(RES* ssl, sldns_buffer* buf, struct worker* worker)
 439 {
 440         char* s = (char*)sldns_buffer_begin(buf);
 441         struct regional* region = worker->scratchpad;
 442         struct ub_packed_rrset_key* rk;
 443         struct packed_rrset_data* d;
 444         unsigned int rr_count, rrsig_count, trust, security;
 445         long long ttl;
 446         unsigned int i;
 447         int go_on = 1;
 448         regional_free_all(region);
 449
 450         rk = (struct ub_packed_rrset_key*)regional_alloc_zero(region,
 451                 sizeof(*rk));
 452         d = (struct packed_rrset_data*)regional_alloc_zero(region, sizeof(*d));
 453         if(!rk || !d) {
 454                 log_warn("error out of memory");
 455                 return 0;
 456         }
 457
 458         if(strncmp(s, ";rrset", 6) != 0) {
 459                 log_warn("error expected ';rrset' but got %s", s);
 460                 return 0;
 461         }
 462         s += 6;
 463         if(strncmp(s, " nsec_apex", 10) == 0) {
 464                 s += 10;
 465                 rk->rk.flags |= PACKED_RRSET_NSEC_AT_APEX;
 466         }
 467         if(sscanf(s, " " ARG_LL "d %u %u %u %u", &ttl, &rr_count, &rrsig_count,
 468                 &trust, &security) != 5) {
 469                 log_warn("error bad rrset spec %s", s);
 470                 return 0;
 471         }
 472         if(rr_count == 0 && rrsig_count == 0) {
 473                 log_warn("bad rrset without contents");
 474                 return 0;
 475         }
 476         if(rr_count > RR_COUNT_MAX || rrsig_count > RR_COUNT_MAX) {
 477                 log_warn("bad rrset with too many rrs");
 478                 return 0;
 479         }
 480         d->count = (size_t)rr_count;
 481         d->rrsig_count = (size_t)rrsig_count;
 482         d->security = (enum sec_status)security;
 483         d->trust = (enum rrset_trust)trust;
 484         d->ttl = (time_t)ttl + *worker->env.now;
 485
 486         d->rr_len = regional_alloc_zero(region,
 487                 sizeof(size_t)*(d->count+d->rrsig_count));
 488         d->rr_ttl = regional_alloc_zero(region,
 489                 sizeof(time_t)*(d->count+d->rrsig_count));
 490         d->rr_data = regional_alloc_zero(region,
 491                 sizeof(uint8_t*)*(d->count+d->rrsig_count));
 492         if(!d->rr_len || !d->rr_ttl || !d->rr_data) {
 493                 log_warn("error out of memory");
 494                 return 0;
 495         }
 496
 497         /* read the rr's themselves */
 498         for(i=0; i<rr_count; i++) {
 499                 if(!load_rr(ssl, buf, region, rk, d, i, 0,
 500                         &go_on, *worker->env.now)) {
 501                         log_warn("could not read rr %u", i);
 502                         return 0;
 503                 }
 504         }
 505         for(i=0; i<rrsig_count; i++) {
 506                 if(!load_rr(ssl, buf, region, rk, d, i+rr_count, 1,
 507                         &go_on, *worker->env.now)) {
 508                         log_warn("could not read rrsig %u", i);
 509                         return 0;
 510                 }
 511         }
 512         if(!go_on) {
 513                 /* skip this entry */
 514                 return 1;
 515         }
 516
 517         return move_into_cache(rk, d, worker);
 518 }
 519
 520 /** load rrset cache */
 521 static int
 522 load_rrset_cache(RES* ssl, struct worker* worker)
 523 {
 524         sldns_buffer* buf = worker->env.scratch_buffer;
 525         if(!read_fixed(ssl, buf, "START_RRSET_CACHE")) return 0;
 526         while(ssl_read_buf(ssl, buf) &&
 527                 strcmp((char*)sldns_buffer_begin(buf), "END_RRSET_CACHE")!=0) {
 528                 if(!load_rrset(ssl, buf, worker))
 529                         return 0;
 530         }
 531         return 1;
 532 }
 533
 534 /** read qinfo from next three words */
 535 static char*
 536 load_qinfo(char* str, struct query_info* qinfo, struct regional* region)
 537 {
 538         /* s is part of the buf */
 539         char* s = str;
 540         uint8_t rr[LDNS_RR_BUF_SIZE];
 541         size_t rr_len = sizeof(rr), dname_len = 0;
 542         int status;
 543
 544         /* skip three words */
 545         s = strchr(str, ' ');
 546         if(s) s = strchr(s+1, ' ');
 547         if(s) s = strchr(s+1, ' ');
 548         if(!s) {
 549                 log_warn("error line too short, %s", str);
 550                 return NULL;
 551         }
 552         s[0] = 0;
 553         s++;
 554
 555         /* parse them */
 556         status = sldns_str2wire_rr_question_buf(str, rr, &rr_len, &dname_len,
 557                 NULL, 0, NULL, 0);
 558         if(status != 0) {
 559                 log_warn("error cannot parse: %s %s",
 560                         sldns_get_errorstr_parse(status), str);
 561                 return NULL;
 562         }
 563         qinfo->qtype = sldns_wirerr_get_type(rr, rr_len, dname_len);
 564         qinfo->qclass = sldns_wirerr_get_class(rr, rr_len, dname_len);
 565         qinfo->qname_len = dname_len;
 566         qinfo->qname = (uint8_t*)regional_alloc_init(region, rr, dname_len);
 567         qinfo->local_alias = NULL;
 568         if(!qinfo->qname) {
 569                 log_warn("error out of memory");
 570                 return NULL;
 571         }
 572
 573         return s;
 574 }
 575
 576 /** load a msg rrset reference */
 577 static int
 578 load_ref(RES* ssl, sldns_buffer* buf, struct worker* worker,
 579         struct regional *region, struct ub_packed_rrset_key** rrset,
 580         int* go_on)
 581 {
 582         char* s = (char*)sldns_buffer_begin(buf);
 583         struct query_info qinfo;
 584         unsigned int flags;
 585         struct ub_packed_rrset_key* k;
 586
 587         /* read line */
 588         if(!ssl_read_buf(ssl, buf))
 589                 return 0;
 590         if(strncmp(s, "BADREF", 6) == 0) {
 591                 *go_on = 0; /* its bad, skip it and skip message */
 592                 return 1;
 593         }
 594
 595         s = load_qinfo(s, &qinfo, region);
 596         if(!s) {
 597                 return 0;
 598         }
 599         if(sscanf(s, " %u", &flags) != 1) {
 600                 log_warn("error cannot parse flags: %s", s);
 601                 return 0;
 602         }
 603
 604         /* lookup in cache */
 605         k = rrset_cache_lookup(worker->env.rrset_cache, qinfo.qname,
 606                 qinfo.qname_len, qinfo.qtype, qinfo.qclass,
 607                 (uint32_t)flags, *worker->env.now, 0);
 608         if(!k) {
 609                 /* not found or expired */
 610                 *go_on = 0;
 611                 return 1;
 612         }
 613
 614         /* store in result */
 615         *rrset = packed_rrset_copy_region(k, region, *worker->env.now);
 616         lock_rw_unlock(&k->entry.lock);
 617
 618         return (*rrset != NULL);
 619 }
 620
 621 /** load a msg entry */
 622 static int
 623 load_msg(RES* ssl, sldns_buffer* buf, struct worker* worker)
 624 {
 625         struct regional* region = worker->scratchpad;
 626         struct query_info qinf;
 627         struct reply_info rep;
 628         char* s = (char*)sldns_buffer_begin(buf);
 629         unsigned int flags, qdcount, security, an, ns, ar;
 630         long long ttl;
 631         size_t i;
 632         int go_on = 1;
 633
 634         regional_free_all(region);
 635
 636         if(strncmp(s, "msg ", 4) != 0) {
 637                 log_warn("error expected msg but got %s", s);
 638                 return 0;
 639         }
 640         s += 4;
 641         s = load_qinfo(s, &qinf, region);
 642         if(!s) {
 643                 return 0;
 644         }
 645
 646         /* read remainder of line */
 647         if(sscanf(s, " %u %u " ARG_LL "d %u %u %u %u", &flags, &qdcount, &ttl,
 648                 &security, &an, &ns, &ar) != 7) {
 649                 log_warn("error cannot parse numbers: %s", s);
 650                 return 0;
 651         }
 652         rep.flags = (uint16_t)flags;
 653         rep.qdcount = (uint16_t)qdcount;
 654         rep.ttl = (time_t)ttl;
 655         rep.prefetch_ttl = PREFETCH_TTL_CALC(rep.ttl);
 656         rep.serve_expired_ttl = rep.ttl + SERVE_EXPIRED_TTL;
 657         rep.security = (enum sec_status)security;
 658         if(an > RR_COUNT_MAX || ns > RR_COUNT_MAX || ar > RR_COUNT_MAX) {
 659                 log_warn("error too many rrsets");
 660                 return 0; /* protect against integer overflow in alloc */
 661         }
 662         rep.an_numrrsets = (size_t)an;
 663         rep.ns_numrrsets = (size_t)ns;
 664         rep.ar_numrrsets = (size_t)ar;
 665         rep.rrset_count = (size_t)an+(size_t)ns+(size_t)ar;
 666         rep.rrsets = (struct ub_packed_rrset_key**)regional_alloc_zero(
 667                 region, sizeof(struct ub_packed_rrset_key*)*rep.rrset_count);
 668
 669         /* fill repinfo with references */
 670         for(i=0; i<rep.rrset_count; i++) {
 671                 if(!load_ref(ssl, buf, worker, region, &rep.rrsets[i],
 672                         &go_on)) {
 673                         return 0;
 674                 }
 675         }
 676
 677         if(!go_on)
 678                 return 1; /* skip this one, not all references satisfied */
 679
 680         if(!dns_cache_store(&worker->env, &qinf, &rep, 0, 0, 0, NULL, flags)) {
 681                 log_warn("error out of memory");
 682                 return 0;
 683         }
 684         return 1;
 685 }
 686
 687 /** load msg cache */
 688 static int
 689 load_msg_cache(RES* ssl, struct worker* worker)
 690 {
 691         sldns_buffer* buf = worker->env.scratch_buffer;
 692         if(!read_fixed(ssl, buf, "START_MSG_CACHE")) return 0;
 693         while(ssl_read_buf(ssl, buf) &&
 694                 strcmp((char*)sldns_buffer_begin(buf), "END_MSG_CACHE")!=0) {
 695                 if(!load_msg(ssl, buf, worker))
 696                         return 0;
 697         }
 698         return 1;
 699 }
 700
 701 int
 702 load_cache(RES* ssl, struct worker* worker)
 703 {
 704         if(!load_rrset_cache(ssl, worker))
 705                 return 0;
 706         if(!load_msg_cache(ssl, worker))
 707                 return 0;
 708         return read_fixed(ssl, worker->env.scratch_buffer, "EOF");
 709 }
 710
 711 /** print details on a delegation point */
 712 static void
 713 print_dp_details(RES* ssl, struct worker* worker, struct delegpt* dp)
 714 {
 715         char buf[257];
 716         struct delegpt_addr* a;
 717         int lame, dlame, rlame, rto, edns_vs, to, delay,
 718                 tA = 0, tAAAA = 0, tother = 0;
 719         long long entry_ttl;
 720         struct rtt_info ri;
 721         uint8_t edns_lame_known;
 722         for(a = dp->target_list; a; a = a->next_target) {
 723                 addr_to_str(&a->addr, a->addrlen, buf, sizeof(buf));
 724                 if(!ssl_printf(ssl, "%-16s\t", buf))
 725                         return;
 726                 if(a->bogus) {
 727                         if(!ssl_printf(ssl, "Address is BOGUS. "))
 728                                 return;
 729                 }
 730                 /* lookup in infra cache */
 731                 delay=0;
 732                 entry_ttl = infra_get_host_rto(worker->env.infra_cache,
 733                         &a->addr, a->addrlen, dp->name, dp->namelen,
 734                         &ri, &delay, *worker->env.now, &tA, &tAAAA, &tother);
 735                 if(entry_ttl == -2 && ri.rto >= USEFUL_SERVER_TOP_TIMEOUT) {
 736                         if(!ssl_printf(ssl, "expired, rto %d msec, tA %d "
 737                                 "tAAAA %d tother %d.\n", ri.rto, tA, tAAAA,
 738                                 tother))
 739                                 return;
 740                         continue;
 741                 }
 742                 if(entry_ttl == -1 || entry_ttl == -2) {
 743                         if(!ssl_printf(ssl, "not in infra cache.\n"))
 744                                 return;
 745                         continue; /* skip stuff not in infra cache */
 746                 }
 747
 748                 /* uses type_A because most often looked up, but other
 749                  * lameness won't be reported then */
 750                 if(!infra_get_lame_rtt(worker->env.infra_cache,
 751                         &a->addr, a->addrlen, dp->name, dp->namelen,
 752                         LDNS_RR_TYPE_A, &lame, &dlame, &rlame, &rto,
 753                         *worker->env.now)) {
 754                         if(!ssl_printf(ssl, "not in infra cache.\n"))
 755                                 return;
 756                         continue; /* skip stuff not in infra cache */
 757                 }
 758                 if(!ssl_printf(ssl, "%s%s%s%srto %d msec, ttl " ARG_LL "d, "
 759                         "ping %d var %d rtt %d, tA %d, tAAAA %d, tother %d",
 760                         lame?"LAME ":"", dlame?"NoDNSSEC ":"",
 761                         a->lame?"AddrWasParentSide ":"",
 762                         rlame?"NoAuthButRecursive ":"", rto, entry_ttl,
 763                         ri.srtt, ri.rttvar, rtt_notimeout(&ri),
 764                         tA, tAAAA, tother))
 765                         return;
 766                 if(delay)
 767                         if(!ssl_printf(ssl, ", probedelay %d", delay))
 768                                 return;
 769                 if(infra_host(worker->env.infra_cache, &a->addr, a->addrlen,
 770                         dp->name, dp->namelen, *worker->env.now, &edns_vs,
 771                         &edns_lame_known, &to)) {
 772                         if(edns_vs == -1) {
 773                                 if(!ssl_printf(ssl, ", noEDNS%s.",
 774                                         edns_lame_known?" probed":" assumed"))
 775                                         return;
 776                         } else {
 777                                 if(!ssl_printf(ssl, ", EDNS %d%s.", edns_vs,
 778                                         edns_lame_known?" probed":" assumed"))
 779                                         return;
 780                         }
 781                 }
 782                 if(!ssl_printf(ssl, "\n"))
 783                         return;
 784         }
 785 }
 786
 787 /** print main dp info */
 788 static void
 789 print_dp_main(RES* ssl, struct delegpt* dp, struct dns_msg* msg)
 790 {
 791         size_t i, n_ns, n_miss, n_addr, n_res, n_avail;
 792
 793         /* print the dp */
 794         if(msg)
 795             for(i=0; i<msg->rep->rrset_count; i++) {
 796                 struct ub_packed_rrset_key* k = msg->rep->rrsets[i];
 797                 struct packed_rrset_data* d =
 798                         (struct packed_rrset_data*)k->entry.data;
 799                 if(d->security == sec_status_bogus) {
 800                         if(!ssl_printf(ssl, "Address is BOGUS:\n"))
 801                                 return;
 802                 }
 803                 if(!dump_rrset(ssl, k, d, 0))
 804                         return;
 805             }
 806         delegpt_count_ns(dp, &n_ns, &n_miss);
 807         delegpt_count_addr(dp, &n_addr, &n_res, &n_avail);
 808         /* since dp has not been used by iterator, all are available*/
 809         if(!ssl_printf(ssl, "Delegation with %d names, of which %d "
 810                 "can be examined to query further addresses.\n"
 811                 "%sIt provides %d IP addresses.\n",
 812                 (int)n_ns, (int)n_miss, (dp->bogus?"It is BOGUS. ":""),
 813                 (int)n_addr))
 814                 return;
 815 }
 816
 817 int print_deleg_lookup(RES* ssl, struct worker* worker, uint8_t* nm,
 818         size_t nmlen, int ATTR_UNUSED(nmlabs))
 819 {
 820         /* deep links into the iterator module */
 821         struct delegpt* dp;
 822         struct dns_msg* msg;
 823         struct regional* region = worker->scratchpad;
 824         char b[260];
 825         struct query_info qinfo;
 826         struct iter_hints_stub* stub;
 827         regional_free_all(region);
 828         qinfo.qname = nm;
 829         qinfo.qname_len = nmlen;
 830         qinfo.qtype = LDNS_RR_TYPE_A;
 831         qinfo.qclass = LDNS_RR_CLASS_IN;
 832         qinfo.local_alias = NULL;
 833
 834         dname_str(nm, b);
 835         if(!ssl_printf(ssl, "The following name servers are used for lookup "
 836                 "of %s\n", b))
 837                 return 0;
 838
 839         dp = forwards_lookup(worker->env.fwds, nm, qinfo.qclass);
 840         if(dp) {
 841                 if(!ssl_printf(ssl, "forwarding request:\n"))
 842                         return 0;
 843                 print_dp_main(ssl, dp, NULL);
 844                 print_dp_details(ssl, worker, dp);
 845                 return 1;
 846         }
 847
 848         while(1) {
 849                 dp = dns_cache_find_delegation(&worker->env, nm, nmlen,
 850                         qinfo.qtype, qinfo.qclass, region, &msg,
 851                         *worker->env.now);
 852                 if(!dp) {
 853                         return ssl_printf(ssl, "no delegation from "
 854                                 "cache; goes to configured roots\n");
 855                 }
 856                 /* go up? */
 857                 if(iter_dp_is_useless(&qinfo, BIT_RD, dp)) {
 858                         print_dp_main(ssl, dp, msg);
 859                         print_dp_details(ssl, worker, dp);
 860                         if(!ssl_printf(ssl, "cache delegation was "
 861                                 "useless (no IP addresses)\n"))
 862                                 return 0;
 863                         if(dname_is_root(nm)) {
 864                                 /* goes to root config */
 865                                 return ssl_printf(ssl, "no delegation from "
 866                                         "cache; goes to configured roots\n");
 867                         } else {
 868                                 /* useless, goes up */
 869                                 nm = dp->name;
 870                                 nmlen = dp->namelen;
 871                                 dname_remove_label(&nm, &nmlen);
 872                                 dname_str(nm, b);
 873                                 if(!ssl_printf(ssl, "going up, lookup %s\n", b))
 874                                         return 0;
 875                                 continue;
 876                         }
 877                 }
 878                 stub = hints_lookup_stub(worker->env.hints, nm, qinfo.qclass,
 879                         dp);
 880                 if(stub) {
 881                         if(stub->noprime) {
 882                                 if(!ssl_printf(ssl, "The noprime stub servers "
 883                                         "are used:\n"))
 884                                         return 0;
 885                         } else {
 886                                 if(!ssl_printf(ssl, "The stub is primed "
 887                                                 "with servers:\n"))
 888                                         return 0;
 889                         }
 890                         print_dp_main(ssl, stub->dp, NULL);
 891                         print_dp_details(ssl, worker, stub->dp);
 892                 } else {
 893                         print_dp_main(ssl, dp, msg);
 894                         print_dp_details(ssl, worker, dp);
 895                 }
 896                 break;
 897         }
 898
 899         return 1;
 900 }