contrib/unbound/daemon/stats.c

   1 /*
   2  * daemon/stats.c - collect runtime performance indicators.
   3  *
   4  * Copyright (c) 2007, 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 describes the data structure used to collect runtime performance
  40  * numbers. These 'statistics' may be of interest to the operator.
  41  */
  42 #include "config.h"
  43 #ifdef HAVE_TIME_H
  44 #include <time.h>
  45 #endif
  46 #include <sys/time.h>
  47 #include <sys/types.h>
  48 #include "daemon/stats.h"
  49 #include "daemon/worker.h"
  50 #include "daemon/daemon.h"
  51 #include "services/mesh.h"
  52 #include "services/outside_network.h"
  53 #include "services/listen_dnsport.h"
  54 #include "util/config_file.h"
  55 #include "util/tube.h"
  56 #include "util/timehist.h"
  57 #include "util/net_help.h"
  58 #include "validator/validator.h"
  59 #include "iterator/iterator.h"
  60 #include "sldns/sbuffer.h"
  61 #include "services/cache/rrset.h"
  62 #include "services/cache/infra.h"
  63 #include "services/authzone.h"
  64 #include "validator/val_kcache.h"
  65 #include "validator/val_neg.h"
  66 #ifdef CLIENT_SUBNET
  67 #include "edns-subnet/subnetmod.h"
  68 #endif
  69 #ifdef HAVE_SSL
  70 #include <openssl/ssl.h>
  71 #endif
  72
  73 /** add timers and the values do not overflow or become negative */
  74 static void
  75 stats_timeval_add(long long* d_sec, long long* d_usec, long long add_sec, long long add_usec)
  76 {
  77 #ifndef S_SPLINT_S
  78         (*d_sec) += add_sec;
  79         (*d_usec) += add_usec;
  80         if((*d_usec) > 1000000) {
  81                 (*d_usec) -= 1000000;
  82                 (*d_sec)++;
  83         }
  84 #endif
  85 }
  86
  87 void server_stats_init(struct ub_server_stats* stats, struct config_file* cfg)
  88 {
  89         memset(stats, 0, sizeof(*stats));
  90         stats->extended = cfg->stat_extended;
  91 }
  92
  93 void server_stats_querymiss(struct ub_server_stats* stats, struct worker* worker)
  94 {
  95         stats->num_queries_missed_cache++;
  96         stats->sum_query_list_size += worker->env.mesh->all.count;
  97         if((long long)worker->env.mesh->all.count > stats->max_query_list_size)
  98                 stats->max_query_list_size = (long long)worker->env.mesh->all.count;
  99 }
 100
 101 void server_stats_prefetch(struct ub_server_stats* stats, struct worker* worker)
 102 {
 103         stats->num_queries_prefetch++;
 104         /* changes the query list size so account that, like a querymiss */
 105         stats->sum_query_list_size += worker->env.mesh->all.count;
 106         if((long long)worker->env.mesh->all.count > stats->max_query_list_size)
 107                 stats->max_query_list_size = (long long)worker->env.mesh->all.count;
 108 }
 109
 110 void server_stats_log(struct ub_server_stats* stats, struct worker* worker,
 111         int threadnum)
 112 {
 113         log_info("server stats for thread %d: %u queries, "
 114                 "%u answers from cache, %u recursions, %u prefetch, %u rejected by "
 115                 "ip ratelimiting",
 116                 threadnum, (unsigned)stats->num_queries,
 117                 (unsigned)(stats->num_queries -
 118                         stats->num_queries_missed_cache),
 119                 (unsigned)stats->num_queries_missed_cache,
 120                 (unsigned)stats->num_queries_prefetch,
 121                 (unsigned)stats->num_queries_ip_ratelimited);
 122         log_info("server stats for thread %d: requestlist max %u avg %g "
 123                 "exceeded %u jostled %u", threadnum,
 124                 (unsigned)stats->max_query_list_size,
 125                 (stats->num_queries_missed_cache+stats->num_queries_prefetch)?
 126                         (double)stats->sum_query_list_size/
 127                         (double)(stats->num_queries_missed_cache+
 128                         stats->num_queries_prefetch) : 0.0,
 129                 (unsigned)worker->env.mesh->stats_dropped,
 130                 (unsigned)worker->env.mesh->stats_jostled);
 131 }
 132
 133
 134 #ifdef CLIENT_SUBNET
 135 /** Set the EDNS Subnet stats. */
 136 static void
 137 set_subnet_stats(struct worker* worker, struct ub_server_stats* svr,
 138         int reset)
 139 {
 140         int m = modstack_find(&worker->env.mesh->mods, "subnet");
 141         struct subnet_env* sne;
 142         if(m == -1)
 143                 return;
 144         sne = (struct subnet_env*)worker->env.modinfo[m];
 145         if(reset && !worker->env.cfg->stat_cumulative) {
 146                 lock_rw_wrlock(&sne->biglock);
 147         } else {
 148                 lock_rw_rdlock(&sne->biglock);
 149         }
 150         svr->num_query_subnet = (long long)(sne->num_msg_nocache + sne->num_msg_cache);
 151         svr->num_query_subnet_cache = (long long)sne->num_msg_cache;
 152         if(reset && !worker->env.cfg->stat_cumulative) {
 153                 sne->num_msg_cache = 0;
 154                 sne->num_msg_nocache = 0;
 155         }
 156         lock_rw_unlock(&sne->biglock);
 157 }
 158 #endif /* CLIENT_SUBNET */
 159
 160 /** Set the neg cache stats. */
 161 static void
 162 set_neg_cache_stats(struct worker* worker, struct ub_server_stats* svr,
 163         int reset)
 164 {
 165         int m = modstack_find(&worker->env.mesh->mods, "validator");
 166         struct val_env* ve;
 167         struct val_neg_cache* neg;
 168         if(m == -1)
 169                 return;
 170         ve = (struct val_env*)worker->env.modinfo[m];
 171         if(!ve->neg_cache)
 172                 return;
 173         neg = ve->neg_cache;
 174         lock_basic_lock(&neg->lock);
 175         svr->num_neg_cache_noerror = (long long)neg->num_neg_cache_noerror;
 176         svr->num_neg_cache_nxdomain = (long long)neg->num_neg_cache_nxdomain;
 177         if(reset && !worker->env.cfg->stat_cumulative) {
 178                 neg->num_neg_cache_noerror = 0;
 179                 neg->num_neg_cache_nxdomain = 0;
 180         }
 181         lock_basic_unlock(&neg->lock);
 182 }
 183
 184 /** get rrsets bogus number from validator */
 185 static size_t
 186 get_rrset_bogus(struct worker* worker, int reset)
 187 {
 188         int m = modstack_find(&worker->env.mesh->mods, "validator");
 189         struct val_env* ve;
 190         size_t r;
 191         if(m == -1)
 192                 return 0;
 193         ve = (struct val_env*)worker->env.modinfo[m];
 194         lock_basic_lock(&ve->bogus_lock);
 195         r = ve->num_rrset_bogus;
 196         if(reset && !worker->env.cfg->stat_cumulative)
 197                 ve->num_rrset_bogus = 0;
 198         lock_basic_unlock(&ve->bogus_lock);
 199         return r;
 200 }
 201
 202 /** get number of ratelimited queries from iterator */
 203 static size_t
 204 get_queries_ratelimit(struct worker* worker, int reset)
 205 {
 206         int m = modstack_find(&worker->env.mesh->mods, "iterator");
 207         struct iter_env* ie;
 208         size_t r;
 209         if(m == -1)
 210                 return 0;
 211         ie = (struct iter_env*)worker->env.modinfo[m];
 212         lock_basic_lock(&ie->queries_ratelimit_lock);
 213         r = ie->num_queries_ratelimited;
 214         if(reset && !worker->env.cfg->stat_cumulative)
 215                 ie->num_queries_ratelimited = 0;
 216         lock_basic_unlock(&ie->queries_ratelimit_lock);
 217         return r;
 218 }
 219
 220 #ifdef USE_DNSCRYPT
 221 /** get the number of shared secret cache miss */
 222 static size_t
 223 get_dnscrypt_cache_miss(struct worker* worker, int reset)
 224 {
 225         size_t r;
 226         struct dnsc_env* de = worker->daemon->dnscenv;
 227         if(!de) return 0;
 228
 229         lock_basic_lock(&de->shared_secrets_cache_lock);
 230         r = de->num_query_dnscrypt_secret_missed_cache;
 231         if(reset && !worker->env.cfg->stat_cumulative)
 232                 de->num_query_dnscrypt_secret_missed_cache = 0;
 233         lock_basic_unlock(&de->shared_secrets_cache_lock);
 234         return r;
 235 }
 236
 237 /** get the number of replayed queries */
 238 static size_t
 239 get_dnscrypt_replay(struct worker* worker, int reset)
 240 {
 241         size_t r;
 242         struct dnsc_env* de = worker->daemon->dnscenv;
 243
 244         lock_basic_lock(&de->nonces_cache_lock);
 245         r = de->num_query_dnscrypt_replay;
 246         if(reset && !worker->env.cfg->stat_cumulative)
 247                 de->num_query_dnscrypt_replay = 0;
 248         lock_basic_unlock(&de->nonces_cache_lock);
 249         return r;
 250 }
 251 #endif /* USE_DNSCRYPT */
 252
 253 void
 254 server_stats_compile(struct worker* worker, struct ub_stats_info* s, int reset)
 255 {
 256         int i;
 257         struct listen_list* lp;
 258
 259         s->svr = worker->stats;
 260         s->mesh_num_states = (long long)worker->env.mesh->all.count;
 261         s->mesh_num_reply_states = (long long)worker->env.mesh->num_reply_states;
 262         s->mesh_jostled = (long long)worker->env.mesh->stats_jostled;
 263         s->mesh_dropped = (long long)worker->env.mesh->stats_dropped;
 264         s->mesh_replies_sent = (long long)worker->env.mesh->replies_sent;
 265         s->mesh_replies_sum_wait_sec = (long long)worker->env.mesh->replies_sum_wait.tv_sec;
 266         s->mesh_replies_sum_wait_usec = (long long)worker->env.mesh->replies_sum_wait.tv_usec;
 267         s->mesh_time_median = timehist_quartile(worker->env.mesh->histogram,
 268                 0.50);
 269
 270         /* add in the values from the mesh */
 271         s->svr.ans_secure += (long long)worker->env.mesh->ans_secure;
 272         s->svr.ans_bogus += (long long)worker->env.mesh->ans_bogus;
 273         s->svr.ans_rcode_nodata += (long long)worker->env.mesh->ans_nodata;
 274         for(i=0; i<16; i++)
 275                 s->svr.ans_rcode[i] += (long long)worker->env.mesh->ans_rcode[i];
 276         timehist_export(worker->env.mesh->histogram, s->svr.hist,
 277                 NUM_BUCKETS_HIST);
 278         /* values from outside network */
 279         s->svr.unwanted_replies = (long long)worker->back->unwanted_replies;
 280         s->svr.qtcp_outgoing = (long long)worker->back->num_tcp_outgoing;
 281
 282         /* get and reset validator rrset bogus number */
 283         s->svr.rrset_bogus = (long long)get_rrset_bogus(worker, reset);
 284
 285         /* get and reset iterator query ratelimit number */
 286         s->svr.queries_ratelimited = (long long)get_queries_ratelimit(worker, reset);
 287
 288         /* get cache sizes */
 289         s->svr.msg_cache_count = (long long)count_slabhash_entries(worker->env.msg_cache);
 290         s->svr.rrset_cache_count = (long long)count_slabhash_entries(&worker->env.rrset_cache->table);
 291         s->svr.infra_cache_count = (long long)count_slabhash_entries(worker->env.infra_cache->hosts);
 292         if(worker->env.key_cache)
 293                 s->svr.key_cache_count = (long long)count_slabhash_entries(worker->env.key_cache->slab);
 294         else    s->svr.key_cache_count = 0;
 295
 296 #ifdef USE_DNSCRYPT
 297         if(worker->daemon->dnscenv) {
 298                 s->svr.num_query_dnscrypt_secret_missed_cache =
 299                         (long long)get_dnscrypt_cache_miss(worker, reset);
 300                 s->svr.shared_secret_cache_count = (long long)count_slabhash_entries(
 301                         worker->daemon->dnscenv->shared_secrets_cache);
 302                 s->svr.nonce_cache_count = (long long)count_slabhash_entries(
 303                         worker->daemon->dnscenv->nonces_cache);
 304                 s->svr.num_query_dnscrypt_replay =
 305                         (long long)get_dnscrypt_replay(worker, reset);
 306         } else {
 307                 s->svr.num_query_dnscrypt_secret_missed_cache = 0;
 308                 s->svr.shared_secret_cache_count = 0;
 309                 s->svr.nonce_cache_count = 0;
 310                 s->svr.num_query_dnscrypt_replay = 0;
 311         }
 312 #else
 313         s->svr.num_query_dnscrypt_secret_missed_cache = 0;
 314         s->svr.shared_secret_cache_count = 0;
 315         s->svr.nonce_cache_count = 0;
 316         s->svr.num_query_dnscrypt_replay = 0;
 317 #endif /* USE_DNSCRYPT */
 318         if(worker->env.auth_zones) {
 319                 if(reset && !worker->env.cfg->stat_cumulative) {
 320                         lock_rw_wrlock(&worker->env.auth_zones->lock);
 321                 } else {
 322                         lock_rw_rdlock(&worker->env.auth_zones->lock);
 323                 }
 324                 s->svr.num_query_authzone_up = (long long)worker->env.
 325                         auth_zones->num_query_up;
 326                 s->svr.num_query_authzone_down = (long long)worker->env.
 327                         auth_zones->num_query_down;
 328                 if(reset && !worker->env.cfg->stat_cumulative) {
 329                         worker->env.auth_zones->num_query_up = 0;
 330                         worker->env.auth_zones->num_query_down = 0;
 331                 }
 332                 lock_rw_unlock(&worker->env.auth_zones->lock);
 333         }
 334         s->svr.mem_stream_wait =
 335                 (long long)tcp_req_info_get_stream_buffer_size();
 336
 337         /* Set neg cache usage numbers */
 338         set_neg_cache_stats(worker, &s->svr, reset);
 339 #ifdef CLIENT_SUBNET
 340         /* EDNS Subnet usage numbers */
 341         set_subnet_stats(worker, &s->svr, reset);
 342 #else
 343         s->svr.num_query_subnet = 0;
 344         s->svr.num_query_subnet_cache = 0;
 345 #endif
 346
 347         /* get tcp accept usage */
 348         s->svr.tcp_accept_usage = 0;
 349         for(lp = worker->front->cps; lp; lp = lp->next) {
 350                 if(lp->com->type == comm_tcp_accept)
 351                         s->svr.tcp_accept_usage += (long long)lp->com->cur_tcp_count;
 352         }
 353
 354         if(reset && !worker->env.cfg->stat_cumulative) {
 355                 worker_stats_clear(worker);
 356         }
 357 }
 358
 359 void server_stats_obtain(struct worker* worker, struct worker* who,
 360         struct ub_stats_info* s, int reset)
 361 {
 362         uint8_t *reply = NULL;
 363         uint32_t len = 0;
 364         if(worker == who) {
 365                 /* just fill it in */
 366                 server_stats_compile(worker, s, reset);
 367                 return;
 368         }
 369         /* communicate over tube */
 370         verbose(VERB_ALGO, "write stats cmd");
 371         if(reset)
 372                 worker_send_cmd(who, worker_cmd_stats);
 373         else    worker_send_cmd(who, worker_cmd_stats_noreset);
 374         verbose(VERB_ALGO, "wait for stats reply");
 375         if(!tube_read_msg(worker->cmd, &reply, &len, 0))
 376                 fatal_exit("failed to read stats over cmd channel");
 377         if(len != (uint32_t)sizeof(*s))
 378                 fatal_exit("stats on cmd channel wrong length %d %d",
 379                         (int)len, (int)sizeof(*s));
 380         memcpy(s, reply, (size_t)len);
 381         free(reply);
 382 }
 383
 384 void server_stats_reply(struct worker* worker, int reset)
 385 {
 386         struct ub_stats_info s;
 387         server_stats_compile(worker, &s, reset);
 388         verbose(VERB_ALGO, "write stats replymsg");
 389         if(!tube_write_msg(worker->daemon->workers[0]->cmd,
 390                 (uint8_t*)&s, sizeof(s), 0))
 391                 fatal_exit("could not write stat values over cmd channel");
 392 }
 393
 394 void server_stats_add(struct ub_stats_info* total, struct ub_stats_info* a)
 395 {
 396         total->svr.num_queries += a->svr.num_queries;
 397         total->svr.num_queries_ip_ratelimited += a->svr.num_queries_ip_ratelimited;
 398         total->svr.num_queries_missed_cache += a->svr.num_queries_missed_cache;
 399         total->svr.num_queries_prefetch += a->svr.num_queries_prefetch;
 400         total->svr.sum_query_list_size += a->svr.sum_query_list_size;
 401 #ifdef USE_DNSCRYPT
 402         total->svr.num_query_dnscrypt_crypted += a->svr.num_query_dnscrypt_crypted;
 403         total->svr.num_query_dnscrypt_cert += a->svr.num_query_dnscrypt_cert;
 404         total->svr.num_query_dnscrypt_cleartext += \
 405                 a->svr.num_query_dnscrypt_cleartext;
 406         total->svr.num_query_dnscrypt_crypted_malformed += \
 407                 a->svr.num_query_dnscrypt_crypted_malformed;
 408 #endif /* USE_DNSCRYPT */
 409         /* the max size reached is upped to higher of both */
 410         if(a->svr.max_query_list_size > total->svr.max_query_list_size)
 411                 total->svr.max_query_list_size = a->svr.max_query_list_size;
 412
 413         if(a->svr.extended) {
 414                 int i;
 415                 total->svr.qtype_big += a->svr.qtype_big;
 416                 total->svr.qclass_big += a->svr.qclass_big;
 417                 total->svr.qtcp += a->svr.qtcp;
 418                 total->svr.qtcp_outgoing += a->svr.qtcp_outgoing;
 419                 total->svr.qtls += a->svr.qtls;
 420                 total->svr.qtls_resume += a->svr.qtls_resume;
 421                 total->svr.qipv6 += a->svr.qipv6;
 422                 total->svr.qbit_QR += a->svr.qbit_QR;
 423                 total->svr.qbit_AA += a->svr.qbit_AA;
 424                 total->svr.qbit_TC += a->svr.qbit_TC;
 425                 total->svr.qbit_RD += a->svr.qbit_RD;
 426                 total->svr.qbit_RA += a->svr.qbit_RA;
 427                 total->svr.qbit_Z += a->svr.qbit_Z;
 428                 total->svr.qbit_AD += a->svr.qbit_AD;
 429                 total->svr.qbit_CD += a->svr.qbit_CD;
 430                 total->svr.qEDNS += a->svr.qEDNS;
 431                 total->svr.qEDNS_DO += a->svr.qEDNS_DO;
 432                 total->svr.ans_rcode_nodata += a->svr.ans_rcode_nodata;
 433                 total->svr.zero_ttl_responses += a->svr.zero_ttl_responses;
 434                 total->svr.ans_secure += a->svr.ans_secure;
 435                 total->svr.ans_bogus += a->svr.ans_bogus;
 436                 total->svr.unwanted_replies += a->svr.unwanted_replies;
 437                 total->svr.unwanted_queries += a->svr.unwanted_queries;
 438                 total->svr.tcp_accept_usage += a->svr.tcp_accept_usage;
 439                 for(i=0; i<UB_STATS_QTYPE_NUM; i++)
 440                         total->svr.qtype[i] += a->svr.qtype[i];
 441                 for(i=0; i<UB_STATS_QCLASS_NUM; i++)
 442                         total->svr.qclass[i] += a->svr.qclass[i];
 443                 for(i=0; i<UB_STATS_OPCODE_NUM; i++)
 444                         total->svr.qopcode[i] += a->svr.qopcode[i];
 445                 for(i=0; i<UB_STATS_RCODE_NUM; i++)
 446                         total->svr.ans_rcode[i] += a->svr.ans_rcode[i];
 447                 for(i=0; i<NUM_BUCKETS_HIST; i++)
 448                         total->svr.hist[i] += a->svr.hist[i];
 449         }
 450
 451         total->mesh_num_states += a->mesh_num_states;
 452         total->mesh_num_reply_states += a->mesh_num_reply_states;
 453         total->mesh_jostled += a->mesh_jostled;
 454         total->mesh_dropped += a->mesh_dropped;
 455         total->mesh_replies_sent += a->mesh_replies_sent;
 456         stats_timeval_add(&total->mesh_replies_sum_wait_sec, &total->mesh_replies_sum_wait_usec, a->mesh_replies_sum_wait_sec, a->mesh_replies_sum_wait_usec);
 457         /* the medians are averaged together, this is not as accurate as
 458          * taking the median over all of the data, but is good and fast
 459          * added up here, division later*/
 460         total->mesh_time_median += a->mesh_time_median;
 461 }
 462
 463 void server_stats_insquery(struct ub_server_stats* stats, struct comm_point* c,
 464         uint16_t qtype, uint16_t qclass, struct edns_data* edns,
 465         struct comm_reply* repinfo)
 466 {
 467         uint16_t flags = sldns_buffer_read_u16_at(c->buffer, 2);
 468         if(qtype < UB_STATS_QTYPE_NUM)
 469                 stats->qtype[qtype]++;
 470         else    stats->qtype_big++;
 471         if(qclass < UB_STATS_QCLASS_NUM)
 472                 stats->qclass[qclass]++;
 473         else    stats->qclass_big++;
 474         stats->qopcode[ LDNS_OPCODE_WIRE(sldns_buffer_begin(c->buffer)) ]++;
 475         if(c->type != comm_udp) {
 476                 stats->qtcp++;
 477                 if(c->ssl != NULL) {
 478                         stats->qtls++;
 479 #ifdef HAVE_SSL
 480                         if(SSL_session_reused(c->ssl))
 481                                 stats->qtls_resume++;
 482 #endif
 483                 }
 484         }
 485         if(repinfo && addr_is_ip6(&repinfo->addr, repinfo->addrlen))
 486                 stats->qipv6++;
 487         if( (flags&BIT_QR) )
 488                 stats->qbit_QR++;
 489         if( (flags&BIT_AA) )
 490                 stats->qbit_AA++;
 491         if( (flags&BIT_TC) )
 492                 stats->qbit_TC++;
 493         if( (flags&BIT_RD) )
 494                 stats->qbit_RD++;
 495         if( (flags&BIT_RA) )
 496                 stats->qbit_RA++;
 497         if( (flags&BIT_Z) )
 498                 stats->qbit_Z++;
 499         if( (flags&BIT_AD) )
 500                 stats->qbit_AD++;
 501         if( (flags&BIT_CD) )
 502                 stats->qbit_CD++;
 503         if(edns->edns_present) {
 504                 stats->qEDNS++;
 505                 if( (edns->bits & EDNS_DO) )
 506                         stats->qEDNS_DO++;
 507         }
 508 }
 509
 510 void server_stats_insrcode(struct ub_server_stats* stats, sldns_buffer* buf)
 511 {
 512         if(stats->extended && sldns_buffer_limit(buf) != 0) {
 513                 int r = (int)LDNS_RCODE_WIRE( sldns_buffer_begin(buf) );
 514                 stats->ans_rcode[r] ++;
 515                 if(r == 0 && LDNS_ANCOUNT( sldns_buffer_begin(buf) ) == 0)
 516                         stats->ans_rcode_nodata ++;
 517         }
 518 }