pdns/dnsdist-snmp.cc

   1
   2 #include "dnsdist-snmp.hh"
   3 #include "dolog.hh"
   4
   5 #ifdef HAVE_NET_SNMP
   6
   7 #define DNSDIST_OID 1, 3, 6, 1, 4, 1, 43315, 3
   8 #define DNSDIST_STATS_OID DNSDIST_OID, 1
   9 #define DNSDIST_STATS_TABLE_OID DNSDIST_OID, 2
  10 #define DNSDIST_TRAPS_OID DNSDIST_OID, 10, 0
  11 #define DNSDIST_TRAP_OBJECTS_OID DNSDIST_OID, 11
  12
  13 static const oid queriesOID[] = { DNSDIST_STATS_OID, 1 };
  14 static const oid responsesOID[] = { DNSDIST_STATS_OID, 2 };
  15 static const oid servfailResponsesOID[] = { DNSDIST_STATS_OID, 3 };
  16 static const oid aclDropsOID[] = { DNSDIST_STATS_OID, 4 };
  17 // 5 was BlockFilter, removed in 1.2.0
  18 static const oid ruleDropOID[] = { DNSDIST_STATS_OID, 6 };
  19 static const oid ruleNXDomainOID[] = { DNSDIST_STATS_OID, 7 };
  20 static const oid ruleRefusedOID[] = { DNSDIST_STATS_OID, 8 };
  21 static const oid selfAnsweredOID[] = { DNSDIST_STATS_OID, 9 };
  22 static const oid downstreamTimeoutsOID[] = { DNSDIST_STATS_OID, 10 };
  23 static const oid downstreamSendErrorsOID[] = { DNSDIST_STATS_OID, 11 };
  24 static const oid truncFailOID[] = { DNSDIST_STATS_OID, 12 };
  25 static const oid noPolicyOID[] = { DNSDIST_STATS_OID, 13 };
  26 static const oid latency0_1OID[] = { DNSDIST_STATS_OID, 14 };
  27 static const oid latency1_10OID[] = { DNSDIST_STATS_OID, 15 };
  28 static const oid latency10_50OID[] = { DNSDIST_STATS_OID, 16 };
  29 static const oid latency50_100OID[] = { DNSDIST_STATS_OID, 17 };
  30 static const oid latency100_1000OID[] = { DNSDIST_STATS_OID, 18 };
  31 static const oid latencySlowOID[] = { DNSDIST_STATS_OID, 19 };
  32 static const oid latencyAvg100OID[] = { DNSDIST_STATS_OID, 20 };
  33 static const oid latencyAvg1000OID[] = { DNSDIST_STATS_OID, 21 };
  34 static const oid latencyAvg10000OID[] = { DNSDIST_STATS_OID, 22 };
  35 static const oid latencyAvg1000000OID[] = { DNSDIST_STATS_OID, 23 };
  36 static const oid uptimeOID[] = { DNSDIST_STATS_OID, 24 };
  37 static const oid realMemoryUsageOID[] = { DNSDIST_STATS_OID, 25 };
  38 static const oid nonCompliantQueriesOID[] = { DNSDIST_STATS_OID, 26 };
  39 static const oid nonCompliantResponsesOID[] = { DNSDIST_STATS_OID, 27 };
  40 static const oid rdQueriesOID[] = { DNSDIST_STATS_OID, 28 };
  41 static const oid emptyQueriesOID[] = { DNSDIST_STATS_OID, 29 };
  42 static const oid cacheHitsOID[] = { DNSDIST_STATS_OID, 30 };
  43 static const oid cacheMissesOID[] = { DNSDIST_STATS_OID, 31 };
  44 static const oid cpuUserMSecOID[] = { DNSDIST_STATS_OID, 32 };
  45 static const oid cpuSysMSecOID[] = { DNSDIST_STATS_OID, 33 };
  46 static const oid fdUsageOID[] = { DNSDIST_STATS_OID, 34 };
  47 static const oid dynBlockedOID[] = { DNSDIST_STATS_OID, 35 };
  48 static const oid dynBlockedNMGSizeOID[] = { DNSDIST_STATS_OID, 36 };
  49
  50 static std::unordered_map<oid, DNSDistStats::entry_t> s_statsMap;
  51
  52 /* We are never called for a GETNEXT if it's registered as a
  53    "instance", as it's "magically" handled for us.  */
  54 /* a instance handler also only hands us one request at a time, so
  55    we don't need to loop over a list of requests; we'll only get one. */
  56
  57 static int handleCounter64Stats(netsnmp_mib_handler* handler,
  58                                 netsnmp_handler_registration* reginfo,
  59                                 netsnmp_agent_request_info* reqinfo,
  60                                 netsnmp_request_info* requests)
  61 {
  62   if (reqinfo->mode != MODE_GET) {
  63     return SNMP_ERR_GENERR;
  64   }
  65
  66   if (reginfo->rootoid_len != OID_LENGTH(queriesOID) + 1) {
  67     return SNMP_ERR_GENERR;
  68   }
  69
  70   const auto& it = s_statsMap.find(reginfo->rootoid[reginfo->rootoid_len - 2]);
  71   if (it == s_statsMap.end()) {
  72     return SNMP_ERR_GENERR;
  73   }
  74
  75   if (const auto& val = boost::get<DNSDistStats::stat_t*>(&it->second)) {
  76     return DNSDistSNMPAgent::setCounter64Value(requests, (*val)->load());
  77   }
  78
  79   return SNMP_ERR_GENERR;
  80 }
  81
  82 static void registerCounter64Stat(const char* name, const oid statOID[], size_t statOIDLength, std::atomic<uint64_t>* ptr)
  83 {
  84   if (statOIDLength != OID_LENGTH(queriesOID)) {
  85     errlog("Invalid OID for SNMP Counter64 statistic %s", name);
  86     return;
  87   }
  88
  89   if (s_statsMap.find(statOID[statOIDLength - 1]) != s_statsMap.end()) {
  90     errlog("OID for SNMP Counter64 statistic %s has already been registered", name);
  91     return;
  92   }
  93
  94   s_statsMap[statOID[statOIDLength - 1]] = ptr;
  95   netsnmp_register_scalar(netsnmp_create_handler_registration(name,
  96                                                               handleCounter64Stats,
  97                                                               statOID,
  98                                                               statOIDLength,
  99                                                               HANDLER_CAN_RONLY));
 100 }
 101
 102 static int handleFloatStats(netsnmp_mib_handler* handler,
 103                             netsnmp_handler_registration* reginfo,
 104                             netsnmp_agent_request_info* reqinfo,
 105                             netsnmp_request_info* requests)
 106 {
 107   if (reqinfo->mode != MODE_GET) {
 108     return SNMP_ERR_GENERR;
 109   }
 110
 111   if (reginfo->rootoid_len != OID_LENGTH(queriesOID) + 1) {
 112     return SNMP_ERR_GENERR;
 113   }
 114
 115   const auto& it = s_statsMap.find(reginfo->rootoid[reginfo->rootoid_len - 2]);
 116   if (it == s_statsMap.end()) {
 117     return SNMP_ERR_GENERR;
 118   }
 119
 120   if (const auto& val = boost::get<double*>(&it->second)) {
 121     std::string str(std::to_string(**val));
 122     snmp_set_var_typed_value(requests->requestvb,
 123                              ASN_OCTET_STR,
 124                              str.c_str(),
 125                              str.size());
 126     return SNMP_ERR_NOERROR;
 127   }
 128
 129   return SNMP_ERR_GENERR;
 130 }
 131
 132 static void registerFloatStat(const char* name, const oid statOID[], size_t statOIDLength, double* ptr)
 133 {
 134   if (statOIDLength != OID_LENGTH(queriesOID)) {
 135     errlog("Invalid OID for SNMP Float statistic %s", name);
 136     return;
 137   }
 138
 139   if (s_statsMap.find(statOID[statOIDLength - 1]) != s_statsMap.end()) {
 140     errlog("OID for SNMP Float statistic %s has already been registered", name);
 141     return;
 142   }
 143
 144   s_statsMap[statOID[statOIDLength - 1]] = ptr;
 145   netsnmp_register_scalar(netsnmp_create_handler_registration(name,
 146                                                               handleFloatStats,
 147                                                               statOID,
 148                                                               statOIDLength,
 149                                                               HANDLER_CAN_RONLY));
 150 }
 151
 152 static int handleGauge64Stats(netsnmp_mib_handler* handler,
 153                               netsnmp_handler_registration* reginfo,
 154                               netsnmp_agent_request_info* reqinfo,
 155                               netsnmp_request_info* requests)
 156 {
 157   if (reqinfo->mode != MODE_GET) {
 158     return SNMP_ERR_GENERR;
 159   }
 160
 161   if (reginfo->rootoid_len != OID_LENGTH(queriesOID) + 1) {
 162     return SNMP_ERR_GENERR;
 163   }
 164
 165   const auto& it = s_statsMap.find(reginfo->rootoid[reginfo->rootoid_len - 2]);
 166   if (it == s_statsMap.end()) {
 167     return SNMP_ERR_GENERR;
 168   }
 169
 170   std::string str;
 171   uint64_t value = (*boost::get<DNSDistStats::statfunction_t>(&it->second))(str);
 172   return DNSDistSNMPAgent::setCounter64Value(requests, value);
 173 }
 174
 175 static void registerGauge64Stat(const char* name, const oid statOID[], size_t statOIDLength, DNSDistStats::statfunction_t ptr)
 176 {
 177   if (statOIDLength != OID_LENGTH(queriesOID)) {
 178     errlog("Invalid OID for SNMP Gauge64 statistic %s", name);
 179     return;
 180   }
 181
 182   if (s_statsMap.find(statOID[statOIDLength - 1]) != s_statsMap.end()) {
 183     errlog("OID for SNMP Gauge64 statistic %s has already been registered", name);
 184     return;
 185   }
 186
 187   s_statsMap[statOID[statOIDLength - 1]] = ptr;
 188   netsnmp_register_scalar(netsnmp_create_handler_registration(name,
 189                                                               handleGauge64Stats,
 190                                                               statOID,
 191                                                               statOIDLength,
 192                                                               HANDLER_CAN_RONLY));
 193 }
 194
 195 /* column number definitions for table backendStatTable */
 196 #define COLUMN_BACKENDID                1
 197 #define COLUMN_BACKENDNAME              2
 198 #define COLUMN_BACKENDLATENCY           3
 199 #define COLUMN_BACKENDWEIGHT            4
 200 #define COLUMN_BACKENDOUTSTANDING       5
 201 #define COLUMN_BACKENDQPSLIMIT          6
 202 #define COLUMN_BACKENDREUSED            7
 203 #define COLUMN_BACKENDSTATE             8
 204 #define COLUMN_BACKENDADDRESS           9
 205 #define COLUMN_BACKENDPOOLS             10
 206 #define COLUMN_BACKENDQPS               11
 207 #define COLUMN_BACKENDQUERIES           12
 208 #define COLUMN_BACKENDORDER             13
 209
 210 static const oid backendStatTableOID[] = { DNSDIST_STATS_TABLE_OID };
 211 static const oid backendNameOID[] = { DNSDIST_STATS_TABLE_OID, 1, 2 };
 212 static const oid backendStateOID[] = { DNSDIST_STATS_TABLE_OID, 1, 8};
 213 static const oid backendAddressOID[] = { DNSDIST_STATS_TABLE_OID, 1, 9};
 214
 215 static const oid socketFamilyOID[] = { DNSDIST_TRAP_OBJECTS_OID, 1, 0 };
 216 static const oid socketProtocolOID[] = { DNSDIST_TRAP_OBJECTS_OID, 2, 0 };
 217 static const oid fromAddressOID[] = { DNSDIST_TRAP_OBJECTS_OID, 3, 0 };
 218 static const oid toAddressOID[] = { DNSDIST_TRAP_OBJECTS_OID, 4, 0 };
 219 static const oid queryTypeOID[] = { DNSDIST_TRAP_OBJECTS_OID, 5, 0 };
 220 static const oid querySizeOID[] = { DNSDIST_TRAP_OBJECTS_OID, 6, 0 };
 221 static const oid queryIDOID[] = { DNSDIST_TRAP_OBJECTS_OID, 7, 0 };
 222 static const oid qNameOID[] = { DNSDIST_TRAP_OBJECTS_OID, 8, 0 };
 223 static const oid qClassOID[] = { DNSDIST_TRAP_OBJECTS_OID, 9, 0 };
 224 static const oid qTypeOID[] = { DNSDIST_TRAP_OBJECTS_OID, 10, 0 };
 225 static const oid trapReasonOID[] = { DNSDIST_TRAP_OBJECTS_OID, 11, 0 };
 226
 227 static const oid backendStatusChangeTrapOID[] = { DNSDIST_TRAPS_OID, 1 };
 228 static const oid actionTrapOID[] = { DNSDIST_TRAPS_OID, 2 };
 229 static const oid customTrapOID[] = { DNSDIST_TRAPS_OID, 3 };
 230
 231 static servers_t s_servers;
 232 static size_t s_currentServerIdx = 0;
 233
 234 static netsnmp_variable_list* backendStatTable_get_next_data_point(void** loop_context,
 235                                                                    void** my_data_context,
 236                                                                    netsnmp_variable_list* put_index_data,
 237                                                                    netsnmp_iterator_info* mydata)
 238 {
 239   if (s_currentServerIdx >= s_servers.size()) {
 240     return NULL;
 241   }
 242
 243   *my_data_context = (void*) (s_servers[s_currentServerIdx]).get();
 244   snmp_set_var_typed_integer(put_index_data, ASN_UNSIGNED, s_currentServerIdx);
 245   s_currentServerIdx++;
 246
 247   return put_index_data;
 248 }
 249
 250 static netsnmp_variable_list* backendStatTable_get_first_data_point(void** loop_context,
 251                                                                     void** data_context,
 252                                                                     netsnmp_variable_list* put_index_data,
 253                                                                     netsnmp_iterator_info* data)
 254 {
 255   s_currentServerIdx = 0;
 256
 257   /* get a copy of the shared_ptrs so they are not
 258      destroyed while we process the request */
 259   const auto& dstates = g_dstates.getCopy();
 260   s_servers.clear();
 261   s_servers.reserve(dstates.size());
 262   for (const auto& server : dstates) {
 263     s_servers.push_back(server);
 264   }
 265
 266   return backendStatTable_get_next_data_point(loop_context,
 267                                               data_context,
 268                                               put_index_data,
 269                                               data);
 270 }
 271
 272 static int backendStatTable_handler(netsnmp_mib_handler* handler,
 273                                     netsnmp_handler_registration* reginfo,
 274                                     netsnmp_agent_request_info* reqinfo,
 275                                     netsnmp_request_info* requests)
 276 {
 277   netsnmp_request_info* request;
 278
 279   switch (reqinfo->mode) {
 280   case MODE_GET:
 281     for (request = requests; request; request = request->next) {
 282       netsnmp_table_request_info* table_info = netsnmp_extract_table_info(request);
 283       const DownstreamState* server = (const DownstreamState*) netsnmp_extract_iterator_context(request);
 284
 285       if (!server) {
 286         continue;
 287       }
 288
 289       switch (table_info->colnum) {
 290       case COLUMN_BACKENDNAME:
 291         snmp_set_var_typed_value(request->requestvb,
 292                                  ASN_OCTET_STR,
 293                                  server->name.c_str(),
 294                                  server->name.size());
 295         break;
 296       case COLUMN_BACKENDLATENCY:
 297         DNSDistSNMPAgent::setCounter64Value(request,
 298                                             server->latencyUsec/1000.0);
 299         break;
 300       case COLUMN_BACKENDWEIGHT:
 301         DNSDistSNMPAgent::setCounter64Value(request,
 302                                             server->weight);
 303         break;
 304       case COLUMN_BACKENDOUTSTANDING:
 305         DNSDistSNMPAgent::setCounter64Value(request,
 306                                             server->outstanding);
 307         break;
 308       case COLUMN_BACKENDQPSLIMIT:
 309         DNSDistSNMPAgent::setCounter64Value(request,
 310                                             server->qps.getRate());
 311         break;
 312       case COLUMN_BACKENDREUSED:
 313         DNSDistSNMPAgent::setCounter64Value(request, server->reuseds);
 314         break;
 315       case COLUMN_BACKENDSTATE:
 316       {
 317         std::string state(server->getStatus());
 318         snmp_set_var_typed_value(request->requestvb,
 319                                  ASN_OCTET_STR,
 320                                  state.c_str(),
 321                                  state.size());
 322         break;
 323       }
 324       case COLUMN_BACKENDADDRESS:
 325       {
 326         std::string addr(server->remote.toStringWithPort());
 327         snmp_set_var_typed_value(request->requestvb,
 328                                  ASN_OCTET_STR,
 329                                  addr.c_str(),
 330                                  addr.size());
 331         break;
 332       }
 333       case COLUMN_BACKENDPOOLS:
 334       {
 335         std::string pools;
 336         for(auto& p : server->pools) {
 337           if(!pools.empty())
 338             pools+=" ";
 339           pools+=p;
 340         }
 341         snmp_set_var_typed_value(request->requestvb,
 342                                  ASN_OCTET_STR,
 343                                  pools.c_str(),
 344                                  pools.size());
 345         break;
 346       }
 347       case COLUMN_BACKENDQPS:
 348         DNSDistSNMPAgent::setCounter64Value(request, server->queryLoad);
 349         break;
 350       case COLUMN_BACKENDQUERIES:
 351         DNSDistSNMPAgent::setCounter64Value(request, server->queries);
 352         break;
 353       case COLUMN_BACKENDORDER:
 354         DNSDistSNMPAgent::setCounter64Value(request, server->order);
 355         break;
 356       default:
 357         netsnmp_set_request_error(reqinfo,
 358                                   request,
 359                                   SNMP_NOSUCHOBJECT);
 360         break;
 361       }
 362     }
 363     break;
 364   }
 365   return SNMP_ERR_NOERROR;
 366 }
 367 #endif /* HAVE_NET_SNMP */
 368
 369 bool DNSDistSNMPAgent::sendBackendStatusChangeTrap(const std::shared_ptr<DownstreamState> dss)
 370 {
 371 #ifdef HAVE_NET_SNMP
 372   const string backendAddress = dss->remote.toStringWithPort();
 373   const string backendStatus = dss->getStatus();
 374   netsnmp_variable_list* varList = nullptr;
 375
 376   snmp_varlist_add_variable(&varList,
 377                             snmpTrapOID,
 378                             snmpTrapOIDLen,
 379                             ASN_OBJECT_ID,
 380                             backendStatusChangeTrapOID,
 381                             OID_LENGTH(backendStatusChangeTrapOID)  * sizeof(oid));
 382
 383
 384   snmp_varlist_add_variable(&varList,
 385                             backendNameOID,
 386                             OID_LENGTH(backendNameOID),
 387                             ASN_OCTET_STR,
 388                             dss->name.c_str(),
 389                             dss->name.size());
 390
 391   snmp_varlist_add_variable(&varList,
 392                             backendAddressOID,
 393                             OID_LENGTH(backendAddressOID),
 394                             ASN_OCTET_STR,
 395                             backendAddress.c_str(),
 396                             backendAddress.size());
 397
 398   snmp_varlist_add_variable(&varList,
 399                             backendStateOID,
 400                             OID_LENGTH(backendStateOID),
 401                             ASN_OCTET_STR,
 402                             backendStatus.c_str(),
 403                             backendStatus.size());
 404
 405   return sendTrap(d_trapPipe[1], varList);
 406 #endif /* HAVE_NET_SNMP */
 407   return true;
 408 }
 409
 410 bool DNSDistSNMPAgent::sendCustomTrap(const std::string& reason)
 411 {
 412 #ifdef HAVE_NET_SNMP
 413   netsnmp_variable_list* varList = nullptr;
 414
 415   snmp_varlist_add_variable(&varList,
 416                             snmpTrapOID,
 417                             snmpTrapOIDLen,
 418                             ASN_OBJECT_ID,
 419                             customTrapOID,
 420                             OID_LENGTH(customTrapOID)  * sizeof(oid));
 421
 422   snmp_varlist_add_variable(&varList,
 423                             trapReasonOID,
 424                             OID_LENGTH(trapReasonOID),
 425                             ASN_OCTET_STR,
 426                             reason.c_str(),
 427                             reason.size());
 428
 429   return sendTrap(d_trapPipe[1], varList);
 430 #endif /* HAVE_NET_SNMP */
 431   return true;
 432 }
 433
 434 bool DNSDistSNMPAgent::sendDNSTrap(const DNSQuestion& dq, const std::string& reason)
 435 {
 436 #ifdef HAVE_NET_SNMP
 437   std::string local = dq.local->toString();
 438   std::string remote = dq.remote->toString();
 439   std::string qname = dq.qname->toStringNoDot();
 440   const uint32_t socketFamily = dq.remote->isIPv4() ? 1 : 2;
 441   const uint32_t socketProtocol = dq.tcp ? 2 : 1;
 442   const uint32_t queryType = dq.dh->qr ? 2 : 1;
 443   const uint32_t querySize = (uint32_t) dq.len;
 444   const uint32_t queryID = (uint32_t) ntohs(dq.dh->id);
 445   const uint32_t qType = (uint32_t) dq.qtype;
 446   const uint32_t qClass = (uint32_t) dq.qclass;
 447
 448   netsnmp_variable_list* varList = nullptr;
 449
 450   snmp_varlist_add_variable(&varList,
 451                             snmpTrapOID,
 452                             snmpTrapOIDLen,
 453                             ASN_OBJECT_ID,
 454                             actionTrapOID,
 455                             OID_LENGTH(actionTrapOID)  * sizeof(oid));
 456
 457   snmp_varlist_add_variable(&varList,
 458                             socketFamilyOID,
 459                             OID_LENGTH(socketFamilyOID),
 460                             ASN_INTEGER,
 461                             (u_char *) &socketFamily,
 462                             sizeof(socketFamily));
 463
 464   snmp_varlist_add_variable(&varList,
 465                             socketProtocolOID,
 466                             OID_LENGTH(socketProtocolOID),
 467                             ASN_INTEGER,
 468                             (u_char *) &socketProtocol,
 469                             sizeof(socketProtocol));
 470
 471   snmp_varlist_add_variable(&varList,
 472                             fromAddressOID,
 473                             OID_LENGTH(fromAddressOID),
 474                             ASN_OCTET_STR,
 475                             remote.c_str(),
 476                             remote.size());
 477
 478   snmp_varlist_add_variable(&varList,
 479                             toAddressOID,
 480                             OID_LENGTH(toAddressOID),
 481                             ASN_OCTET_STR,
 482                             local.c_str(),
 483                             local.size());
 484
 485   snmp_varlist_add_variable(&varList,
 486                             queryTypeOID,
 487                             OID_LENGTH(queryTypeOID),
 488                             ASN_INTEGER,
 489                             (u_char *) &queryType,
 490                             sizeof(queryType));
 491
 492   snmp_varlist_add_variable(&varList,
 493                             querySizeOID,
 494                             OID_LENGTH(querySizeOID),
 495                             ASN_UNSIGNED,
 496                             (u_char *) &querySize,
 497                             sizeof(querySize));
 498
 499   snmp_varlist_add_variable(&varList,
 500                             queryIDOID,
 501                             OID_LENGTH(queryIDOID),
 502                             ASN_UNSIGNED,
 503                             (u_char *) &queryID,
 504                             sizeof(queryID));
 505
 506   snmp_varlist_add_variable(&varList,
 507                             qNameOID,
 508                             OID_LENGTH(qNameOID),
 509                             ASN_OCTET_STR,
 510                             qname.c_str(),
 511                             qname.size());
 512
 513   snmp_varlist_add_variable(&varList,
 514                             qClassOID,
 515                             OID_LENGTH(qClassOID),
 516                             ASN_UNSIGNED,
 517                             (u_char *) &qClass,
 518                             sizeof(qClass));
 519
 520   snmp_varlist_add_variable(&varList,
 521                             qTypeOID,
 522                             OID_LENGTH(qTypeOID),
 523                             ASN_UNSIGNED,
 524                             (u_char *) &qType,
 525                             sizeof(qType));
 526
 527   snmp_varlist_add_variable(&varList,
 528                             trapReasonOID,
 529                             OID_LENGTH(trapReasonOID),
 530                             ASN_OCTET_STR,
 531                             reason.c_str(),
 532                             reason.size());
 533
 534   return sendTrap(d_trapPipe[1], varList);
 535 #endif /* HAVE_NET_SNMP */
 536   return true;
 537 }
 538
 539 DNSDistSNMPAgent::DNSDistSNMPAgent(const std::string& name, const std::string& masterSocket): SNMPAgent(name, masterSocket)
 540 {
 541 #ifdef HAVE_NET_SNMP
 542
 543   registerCounter64Stat("queries", queriesOID, OID_LENGTH(queriesOID), &g_stats.queries);
 544   registerCounter64Stat("responses", responsesOID, OID_LENGTH(responsesOID), &g_stats.responses);
 545   registerCounter64Stat("servfailResponses", servfailResponsesOID, OID_LENGTH(servfailResponsesOID), &g_stats.servfailResponses);
 546   registerCounter64Stat("aclDrops", aclDropsOID, OID_LENGTH(aclDropsOID), &g_stats.aclDrops);
 547   registerCounter64Stat("ruleDrop", ruleDropOID, OID_LENGTH(ruleDropOID), &g_stats.ruleDrop);
 548   registerCounter64Stat("ruleNXDomain", ruleNXDomainOID, OID_LENGTH(ruleNXDomainOID), &g_stats.ruleNXDomain);
 549   registerCounter64Stat("ruleRefused", ruleRefusedOID, OID_LENGTH(ruleRefusedOID), &g_stats.ruleRefused);
 550   registerCounter64Stat("selfAnswered", selfAnsweredOID, OID_LENGTH(selfAnsweredOID), &g_stats.selfAnswered);
 551   registerCounter64Stat("downstreamTimeouts", downstreamTimeoutsOID, OID_LENGTH(downstreamTimeoutsOID), &g_stats.downstreamTimeouts);
 552   registerCounter64Stat("downstreamSendErrors", downstreamSendErrorsOID, OID_LENGTH(downstreamSendErrorsOID), &g_stats.downstreamSendErrors);
 553   registerCounter64Stat("truncFail", truncFailOID, OID_LENGTH(truncFailOID), &g_stats.truncFail);
 554   registerCounter64Stat("noPolicy", noPolicyOID, OID_LENGTH(noPolicyOID), &g_stats.noPolicy);
 555   registerCounter64Stat("latency0_1", latency0_1OID, OID_LENGTH(latency0_1OID), &g_stats.latency0_1);
 556   registerCounter64Stat("latency1_10", latency1_10OID, OID_LENGTH(latency1_10OID), &g_stats.latency1_10);
 557   registerCounter64Stat("latency10_50", latency10_50OID, OID_LENGTH(latency10_50OID), &g_stats.latency10_50);
 558   registerCounter64Stat("latency50_100", latency50_100OID, OID_LENGTH(latency50_100OID), &g_stats.latency50_100);
 559   registerCounter64Stat("latency100_1000", latency100_1000OID, OID_LENGTH(latency100_1000OID), &g_stats.latency100_1000);
 560   registerCounter64Stat("latencySlow", latencySlowOID, OID_LENGTH(latencySlowOID), &g_stats.latencySlow);
 561   registerCounter64Stat("nonCompliantQueries", nonCompliantQueriesOID, OID_LENGTH(nonCompliantQueriesOID), &g_stats.nonCompliantQueries);
 562   registerCounter64Stat("nonCompliantResponses", nonCompliantResponsesOID, OID_LENGTH(nonCompliantResponsesOID), &g_stats.nonCompliantResponses);
 563   registerCounter64Stat("rdQueries", rdQueriesOID, OID_LENGTH(rdQueriesOID), &g_stats.rdQueries);
 564   registerCounter64Stat("emptyQueries", emptyQueriesOID, OID_LENGTH(emptyQueriesOID), &g_stats.emptyQueries);
 565   registerCounter64Stat("cacheHits", cacheHitsOID, OID_LENGTH(cacheHitsOID), &g_stats.cacheHits);
 566   registerCounter64Stat("cacheMisses", cacheMissesOID, OID_LENGTH(cacheMissesOID), &g_stats.cacheMisses);
 567   registerCounter64Stat("dynBlocked", dynBlockedOID, OID_LENGTH(dynBlockedOID), &g_stats.dynBlocked);
 568   registerFloatStat("latencyAvg100", latencyAvg100OID, OID_LENGTH(latencyAvg100OID), &g_stats.latencyAvg100);
 569   registerFloatStat("latencyAvg1000", latencyAvg1000OID, OID_LENGTH(latencyAvg1000OID), &g_stats.latencyAvg1000);
 570   registerFloatStat("latencyAvg10000", latencyAvg10000OID, OID_LENGTH(latencyAvg10000OID), &g_stats.latencyAvg10000);
 571   registerFloatStat("latencyAvg1000000", latencyAvg1000000OID, OID_LENGTH(latencyAvg1000000OID), &g_stats.latencyAvg1000000);
 572   registerGauge64Stat("uptime", uptimeOID, OID_LENGTH(uptimeOID), &uptimeOfProcess);
 573   registerGauge64Stat("realMemoryUsage", realMemoryUsageOID, OID_LENGTH(realMemoryUsageOID), &getRealMemoryUsage);
 574   registerGauge64Stat("cpuUserMSec", cpuUserMSecOID, OID_LENGTH(cpuUserMSecOID), &getCPUTimeUser);
 575   registerGauge64Stat("cpuSysMSec", cpuSysMSecOID, OID_LENGTH(cpuSysMSecOID), &getCPUTimeSystem);
 576   registerGauge64Stat("fdUsage", fdUsageOID, OID_LENGTH(fdUsageOID), &getOpenFileDescriptors);
 577   registerGauge64Stat("dynBlockedNMGSize", dynBlockedNMGSizeOID, OID_LENGTH(dynBlockedNMGSizeOID), [](const std::string&) { return g_dynblockNMG.getLocal()->size(); });
 578
 579
 580   netsnmp_table_registration_info* table_info = SNMP_MALLOC_TYPEDEF(netsnmp_table_registration_info);
 581   netsnmp_table_helper_add_indexes(table_info,
 582                                    ASN_GAUGE,  /* index: backendId */
 583                                    0);
 584   table_info->min_column = COLUMN_BACKENDNAME;
 585   table_info->max_column = COLUMN_BACKENDORDER;
 586   netsnmp_iterator_info* iinfo = SNMP_MALLOC_TYPEDEF(netsnmp_iterator_info);
 587   iinfo->get_first_data_point = backendStatTable_get_first_data_point;
 588   iinfo->get_next_data_point = backendStatTable_get_next_data_point;
 589   iinfo->table_reginfo = table_info;
 590
 591   netsnmp_register_table_iterator(netsnmp_create_handler_registration("backendStatTable",
 592                                                                       backendStatTable_handler,
 593                                                                       backendStatTableOID,
 594                                                                       OID_LENGTH(backendStatTableOID),
 595                                                                       HANDLER_CAN_RONLY),
 596                                   iinfo);
 597
 598 #endif /* HAVE_NET_SNMP */
 599 }