10850027583

Committed 13 Sep 2024 01:27PM UTC coverage: 64.672% (-0.03%) from 64.7%

Build # 10850027583

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push

github

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web-flow

Commit Message

Merge pull request #14667 from rgacogne/ddist-coverity-20240913

dnsdist: Fix a few warnings from Coverity

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62.43

/pdns/dnsdistdist/dnsdist-carbon.cc

/*
 * This file is part of PowerDNS or dnsdist.
 * Copyright -- PowerDNS.COM B.V. and its contributors
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * In addition, for the avoidance of any doubt, permission is granted to
 * link this program with OpenSSL and to (re)distribute the binaries
 * produced as the result of such linking.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "dnsdist-carbon.hh"
#include "dnsdist-cache.hh"
#include "dnsdist.hh"
#include "dnsdist-backoff.hh"
#include "dnsdist-configuration.hh"
#include "dnsdist-frontend.hh"
#include "dnsdist-metrics.hh"

#ifndef DISABLE_CARBON
#include "dolog.hh"
#include "sstuff.hh"
#include "threadname.hh"

namespace dnsdist
{

static bool doOneCarbonExport(const Carbon::Endpoint& endpoint)
{
  const auto& server = endpoint.server;
  const std::string& namespace_name = endpoint.namespace_name;
  const std::string& hostname = endpoint.ourname;
  const std::string& instance_name = endpoint.instance_name;

  try {
    Socket carbonSock(server.sin4.sin_family, SOCK_STREAM);
    carbonSock.setNonBlocking();
    carbonSock.connect(server); // we do the connect so the attempt happens while we gather stats
    ostringstream str;

    const time_t now = time(nullptr);

    {
      auto entries = dnsdist::metrics::g_stats.entries.read_lock();
      for (const auto& entry : *entries) {
        str << namespace_name << "." << hostname << "." << instance_name << "." << entry.d_name << ' ';
        if (const auto& val = std::get_if<pdns::stat_t*>(&entry.d_value)) {
          str << (*val)->load();
        }
        else if (const auto& adval = std::get_if<pdns::stat_double_t*>(&entry.d_value)) {
          str << (*adval)->load();
        }
        else if (const auto& func = std::get_if<dnsdist::metrics::Stats::statfunction_t>(&entry.d_value)) {
          str << (*func)(entry.d_name);
        }
        str << ' ' << now << "\r\n";
      }
    }

    for (const auto& state : dnsdist::configuration::getCurrentRuntimeConfiguration().d_backends) {
      string serverName = state->getName().empty() ? state->d_config.remote.toStringWithPort() : state->getName();
      boost::replace_all(serverName, ".", "_");
      string base = namespace_name;
      base += ".";
      base += hostname;
      base += ".";
      base += instance_name;
      base += ".servers.";
      base += serverName;
      base += ".";
      str << base << "queries" << ' ' << state->queries.load() << " " << now << "\r\n";
      str << base << "responses" << ' ' << state->responses.load() << " " << now << "\r\n";
      str << base << "drops" << ' ' << state->reuseds.load() << " " << now << "\r\n";
      str << base << "latency" << ' ' << (state->d_config.availability != DownstreamState::Availability::Down ? state->latencyUsec / 1000.0 : 0) << " " << now << "\r\n";
      str << base << "latencytcp" << ' ' << (state->d_config.availability != DownstreamState::Availability::Down ? state->latencyUsecTCP / 1000.0 : 0) << " " << now << "\r\n";
      str << base << "senderrors" << ' ' << state->sendErrors.load() << " " << now << "\r\n";
      str << base << "outstanding" << ' ' << state->outstanding.load() << " " << now << "\r\n";
      str << base << "tcpdiedsendingquery" << ' ' << state->tcpDiedSendingQuery.load() << " " << now << "\r\n";
      str << base << "tcpdiedreaddingresponse" << ' ' << state->tcpDiedReadingResponse.load() << " " << now << "\r\n";
      str << base << "tcpgaveup" << ' ' << state->tcpGaveUp.load() << " " << now << "\r\n";
      str << base << "tcpreadimeouts" << ' ' << state->tcpReadTimeouts.load() << " " << now << "\r\n";
      str << base << "tcpwritetimeouts" << ' ' << state->tcpWriteTimeouts.load() << " " << now << "\r\n";
      str << base << "tcpconnecttimeouts" << ' ' << state->tcpConnectTimeouts.load() << " " << now << "\r\n";
      str << base << "tcpcurrentconnections" << ' ' << state->tcpCurrentConnections.load() << " " << now << "\r\n";
      str << base << "tcpmaxconcurrentconnections" << ' ' << state->tcpMaxConcurrentConnections.load() << " " << now << "\r\n";
      str << base << "tcpnewconnections" << ' ' << state->tcpNewConnections.load() << " " << now << "\r\n";
      str << base << "tcpreusedconnections" << ' ' << state->tcpReusedConnections.load() << " " << now << "\r\n";
      str << base << "tlsresumptions" << ' ' << state->tlsResumptions.load() << " " << now << "\r\n";
      str << base << "tcpavgqueriesperconnection" << ' ' << state->tcpAvgQueriesPerConnection.load() << " " << now << "\r\n";
      str << base << "tcpavgconnectionduration" << ' ' << state->tcpAvgConnectionDuration.load() << " " << now << "\r\n";
      str << base << "tcptoomanyconcurrentconnections" << ' ' << state->tcpTooManyConcurrentConnections.load() << " " << now << "\r\n";
      str << base << "healthcheckfailures" << ' ' << state->d_healthCheckMetrics.d_failures << " " << now << "\r\n";
      str << base << "healthcheckfailuresparsing" << ' ' << state->d_healthCheckMetrics.d_parseErrors << " " << now << "\r\n";
      str << base << "healthcheckfailurestimeout" << ' ' << state->d_healthCheckMetrics.d_timeOuts << " " << now << "\r\n";
      str << base << "healthcheckfailuresnetwork" << ' ' << state->d_healthCheckMetrics.d_networkErrors << " " << now << "\r\n";
      str << base << "healthcheckfailuresmismatch" << ' ' << state->d_healthCheckMetrics.d_mismatchErrors << " " << now << "\r\n";
      str << base << "healthcheckfailuresinvalid" << ' ' << state->d_healthCheckMetrics.d_invalidResponseErrors << " " << now << "\r\n";
    }

    std::map<std::string, uint64_t> frontendDuplicates;
    for (const auto& front : dnsdist::getFrontends()) {
      if (front->udpFD == -1 && front->tcpFD == -1) {
        continue;
      }

      string frontName = front->local.toStringWithPort() + (front->udpFD >= 0 ? "_udp" : "_tcp");
      boost::replace_all(frontName, ".", "_");
      auto dupPair = frontendDuplicates.insert({frontName, 1});
      if (!dupPair.second) {
        frontName += "_" + std::to_string(dupPair.first->second);
        ++(dupPair.first->second);
      }

      string base = namespace_name;
      base += ".";
      base += hostname;
      base += ".";
      base += instance_name;
      base += ".frontends.";
      base += frontName;
      base += ".";
      str << base << "queries" << ' ' << front->queries.load() << " " << now << "\r\n";
      str << base << "responses" << ' ' << front->responses.load() << " " << now << "\r\n";
      str << base << "tcpdiedreadingquery" << ' ' << front->tcpDiedReadingQuery.load() << " " << now << "\r\n";
      str << base << "tcpdiedsendingresponse" << ' ' << front->tcpDiedSendingResponse.load() << " " << now << "\r\n";
      str << base << "tcpgaveup" << ' ' << front->tcpGaveUp.load() << " " << now << "\r\n";
      str << base << "tcpclienttimeouts" << ' ' << front->tcpClientTimeouts.load() << " " << now << "\r\n";
      str << base << "tcpdownstreamtimeouts" << ' ' << front->tcpDownstreamTimeouts.load() << " " << now << "\r\n";
      str << base << "tcpcurrentconnections" << ' ' << front->tcpCurrentConnections.load() << " " << now << "\r\n";
      str << base << "tcpmaxconcurrentconnections" << ' ' << front->tcpMaxConcurrentConnections.load() << " " << now << "\r\n";
      str << base << "tcpavgqueriesperconnection" << ' ' << front->tcpAvgQueriesPerConnection.load() << " " << now << "\r\n";
      str << base << "tcpavgconnectionduration" << ' ' << front->tcpAvgConnectionDuration.load() << " " << now << "\r\n";
      str << base << "tls10-queries" << ' ' << front->tls10queries.load() << " " << now << "\r\n";
      str << base << "tls11-queries" << ' ' << front->tls11queries.load() << " " << now << "\r\n";
      str << base << "tls12-queries" << ' ' << front->tls12queries.load() << " " << now << "\r\n";
      str << base << "tls13-queries" << ' ' << front->tls13queries.load() << " " << now << "\r\n";
      str << base << "tls-unknown-queries" << ' ' << front->tlsUnknownqueries.load() << " " << now << "\r\n";
      str << base << "tlsnewsessions" << ' ' << front->tlsNewSessions.load() << " " << now << "\r\n";
      str << base << "tlsresumptions" << ' ' << front->tlsResumptions.load() << " " << now << "\r\n";
      str << base << "tlsunknownticketkeys" << ' ' << front->tlsUnknownTicketKey.load() << " " << now << "\r\n";
      str << base << "tlsinactiveticketkeys" << ' ' << front->tlsInactiveTicketKey.load() << " " << now << "\r\n";

      const TLSErrorCounters* errorCounters = nullptr;
      if (front->tlsFrontend != nullptr) {
        errorCounters = &front->tlsFrontend->d_tlsCounters;
      }
      else if (front->dohFrontend != nullptr) {
        errorCounters = &front->dohFrontend->d_tlsContext.d_tlsCounters;
      }
      if (errorCounters != nullptr) {
        str << base << "tlsdhkeytoosmall" << ' ' << errorCounters->d_dhKeyTooSmall << " " << now << "\r\n";
        str << base << "tlsinappropriatefallback" << ' ' << errorCounters->d_inappropriateFallBack << " " << now << "\r\n";
        str << base << "tlsnosharedcipher" << ' ' << errorCounters->d_noSharedCipher << " " << now << "\r\n";
        str << base << "tlsunknownciphertype" << ' ' << errorCounters->d_unknownCipherType << " " << now << "\r\n";
        str << base << "tlsunknownkeyexchangetype" << ' ' << errorCounters->d_unknownKeyExchangeType << " " << now << "\r\n";
        str << base << "tlsunknownprotocol" << ' ' << errorCounters->d_unknownProtocol << " " << now << "\r\n";
        str << base << "tlsunsupportedec" << ' ' << errorCounters->d_unsupportedEC << " " << now << "\r\n";
        str << base << "tlsunsupportedprotocol" << ' ' << errorCounters->d_unsupportedProtocol << " " << now << "\r\n";
      }
    }

    for (const auto& entry : dnsdist::configuration::getCurrentRuntimeConfiguration().d_pools) {
      string poolName = entry.first;
      boost::replace_all(poolName, ".", "_");
      if (poolName.empty()) {
        poolName = "_default_";
      }
      string base = namespace_name;
      base += ".";
      base += hostname;
      base += ".";
      base += instance_name;
      base += ".pools.";
      base += poolName;
      base += ".";
      const std::shared_ptr<ServerPool> pool = entry.second;
      str << base << "servers"
          << " " << pool->countServers(false) << " " << now << "\r\n";
      str << base << "servers-up"
          << " " << pool->countServers(true) << " " << now << "\r\n";
      if (pool->packetCache != nullptr) {
        const auto& cache = pool->packetCache;
        str << base << "cache-size"
            << " " << cache->getMaxEntries() << " " << now << "\r\n";
        str << base << "cache-entries"
            << " " << cache->getEntriesCount() << " " << now << "\r\n";
        str << base << "cache-hits"
            << " " << cache->getHits() << " " << now << "\r\n";
        str << base << "cache-misses"
            << " " << cache->getMisses() << " " << now << "\r\n";
        str << base << "cache-deferred-inserts"
            << " " << cache->getDeferredInserts() << " " << now << "\r\n";
        str << base << "cache-deferred-lookups"
            << " " << cache->getDeferredLookups() << " " << now << "\r\n";
        str << base << "cache-lookup-collisions"
            << " " << cache->getLookupCollisions() << " " << now << "\r\n";
        str << base << "cache-insert-collisions"
            << " " << cache->getInsertCollisions() << " " << now << "\r\n";
        str << base << "cache-ttl-too-shorts"
            << " " << cache->getTTLTooShorts() << " " << now << "\r\n";
        str << base << "cache-cleanup-count"
            << " " << cache->getCleanupCount() << " " << now << "\r\n";
      }
    }

#ifdef HAVE_DNS_OVER_HTTPS
    {
      std::map<std::string, uint64_t> dohFrontendDuplicates;
      const string base = "dnsdist." + hostname + ".main.doh.";
      for (const auto& doh : dnsdist::getDoHFrontends()) {
        string name = doh->d_tlsContext.d_addr.toStringWithPort();
        boost::replace_all(name, ".", "_");
        boost::replace_all(name, ":", "_");
        boost::replace_all(name, "[", "_");
        boost::replace_all(name, "]", "_");

        auto dupPair = dohFrontendDuplicates.insert({name, 1});
        if (!dupPair.second) {
          name += "_" + std::to_string(dupPair.first->second);
          ++(dupPair.first->second);
        }

        const vector<pair<const char*, const pdns::stat_t&>> values{
          {"http-connects", doh->d_httpconnects},
          {"http1-queries", doh->d_http1Stats.d_nbQueries},
          {"http2-queries", doh->d_http2Stats.d_nbQueries},
          {"http1-200-responses", doh->d_http1Stats.d_nb200Responses},
          {"http2-200-responses", doh->d_http2Stats.d_nb200Responses},
          {"http1-400-responses", doh->d_http1Stats.d_nb400Responses},
          {"http2-400-responses", doh->d_http2Stats.d_nb400Responses},
          {"http1-403-responses", doh->d_http1Stats.d_nb403Responses},
          {"http2-403-responses", doh->d_http2Stats.d_nb403Responses},
          {"http1-500-responses", doh->d_http1Stats.d_nb500Responses},
          {"http2-500-responses", doh->d_http2Stats.d_nb500Responses},
          {"http1-502-responses", doh->d_http1Stats.d_nb502Responses},
          {"http2-502-responses", doh->d_http2Stats.d_nb502Responses},
          {"http1-other-responses", doh->d_http1Stats.d_nbOtherResponses},
          {"http2-other-responses", doh->d_http2Stats.d_nbOtherResponses},
          {"get-queries", doh->d_getqueries},
          {"post-queries", doh->d_postqueries},
          {"bad-requests", doh->d_badrequests},
          {"error-responses", doh->d_errorresponses},
          {"redirect-responses", doh->d_redirectresponses},
          {"valid-responses", doh->d_validresponses}};

        for (const auto& item : values) {
          str << base << name << "." << item.first << " " << item.second << " " << now << "\r\n";
        }
      }
    }
#endif /* HAVE_DNS_OVER_HTTPS */

    {
      std::string qname;
      auto records = dnsdist::QueryCount::g_queryCountRecords.write_lock();
      for (const auto& record : *records) {
        qname = record.first;
        boost::replace_all(qname, ".", "_");
        str << "dnsdist.querycount." << qname << ".queries " << record.second << " " << now << "\r\n";
      }
      records->clear();
    }

    const string msg = str.str();

    int ret = waitForRWData(carbonSock.getHandle(), false, 1, 0);
    if (ret <= 0) {
      vinfolog("Unable to write data to carbon server on %s: %s", server.toStringWithPort(), (ret < 0 ? stringerror() : "Timeout"));
      return false;
    }
    carbonSock.setBlocking();
    writen2(carbonSock.getHandle(), msg.c_str(), msg.size());
  }
  catch (const std::exception& e) {
    warnlog("Problem sending carbon data to %s: %s", server.toStringWithPort(), e.what());
    return false;
  }

  return true;
}

static void carbonHandler(const Carbon::Endpoint& endpoint)
{
  setThreadName("dnsdist/carbon");
  const auto intervalUSec = endpoint.interval * 1000 * 1000;
  /* maximum interval between two attempts is 10 minutes */
  const ExponentialBackOffTimer backOffTimer(10 * 60);

  try {
    uint8_t consecutiveFailures = 0;
    do {
      DTime dtimer;
      dtimer.set();
      if (doOneCarbonExport(endpoint)) {
        const auto elapsedUSec = dtimer.udiff();
        if (elapsedUSec < 0 || static_cast<unsigned int>(elapsedUSec) <= intervalUSec) {
          useconds_t toSleepUSec = intervalUSec - elapsedUSec;
          usleep(toSleepUSec);
        }
        else {
          vinfolog("Carbon export for %s took longer (%s us) than the configured interval (%d us)", endpoint.server.toStringWithPort(), elapsedUSec, intervalUSec);
        }
        consecutiveFailures = 0;
      }
      else {
        const auto backOff = backOffTimer.get(consecutiveFailures);
        if (consecutiveFailures < std::numeric_limits<decltype(consecutiveFailures)>::max()) {
          consecutiveFailures++;
        }
        vinfolog("Run for %s - %s failed, next attempt in %d", endpoint.server.toStringWithPort(), endpoint.ourname, backOff);
        std::this_thread::sleep_for(std::chrono::seconds(backOff));
      }
    } while (true);
  }
  catch (const PDNSException& e) {
    errlog("Carbon thread for %s died, PDNSException: %s", endpoint.server.toStringWithPort(), e.reason);
  }
  catch (...) {
    errlog("Carbon thread for %s died", endpoint.server.toStringWithPort());
  }
}

Carbon::Endpoint Carbon::newEndpoint(const std::string& address, std::string ourName, uint64_t interval, const std::string& namespace_name, const std::string& instance_name)
{
  if (ourName.empty()) {
    try {
      ourName = getCarbonHostName();
    }
    catch (const std::exception& exp) {
      throw std::runtime_error(std::string("The 'ourname' setting in 'carbonServer()' has not been set and we are unable to determine the system's hostname: ") + exp.what());
    }
  }
  return Carbon::Endpoint{ComboAddress(address, 2003),
                          !namespace_name.empty() ? namespace_name : "dnsdist",
                          std::move(ourName),
                          !instance_name.empty() ? instance_name : "main",
                          interval < std::numeric_limits<unsigned int>::max() ? static_cast<unsigned int>(interval) : 30};
}

void Carbon::run(const std::vector<Carbon::Endpoint>& endpoints)
{
  for (const auto& endpoint : endpoints) {
    std::thread newHandler(carbonHandler, endpoint);
    newHandler.detach();
  }
}

}
#endif /* DISABLE_CARBON */

static time_t s_start = time(nullptr);

uint64_t uptimeOfProcess(const std::string& str)
{
  return time(nullptr) - s_start;
}

1	/*
2	* This file is part of PowerDNS or dnsdist.
3	* Copyright -- PowerDNS.COM B.V. and its contributors
4	*
5	* This program is free software; you can redistribute it and/or modify
6	* it under the terms of version 2 of the GNU General Public License as
7	* published by the Free Software Foundation.
8	*
9	* In addition, for the avoidance of any doubt, permission is granted to
10	* link this program with OpenSSL and to (re)distribute the binaries
11	* produced as the result of such linking.
12	*
13	* This program is distributed in the hope that it will be useful,
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	* GNU General Public License for more details.
17	*
18	* You should have received a copy of the GNU General Public License
19	* along with this program; if not, write to the Free Software
20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21	*/
22	#ifdef HAVE_CONFIG_H
23	#include "config.h"
24	#endif
25
26	#include "dnsdist-carbon.hh"
27	#include "dnsdist-cache.hh"
28	#include "dnsdist.hh"
29	#include "dnsdist-backoff.hh"
30	#include "dnsdist-configuration.hh"
31	#include "dnsdist-frontend.hh"
32	#include "dnsdist-metrics.hh"
33
34	#ifndef DISABLE_CARBON
35	#include "dolog.hh"
36	#include "sstuff.hh"
37	#include "threadname.hh"
38
39	namespace dnsdist
40	{
41
42	static bool doOneCarbonExport(const Carbon::Endpoint& endpoint)
43	{	6✔
44	const auto& server = endpoint.server;	6✔
45	const std::string& namespace_name = endpoint.namespace_name;	6✔
46	const std::string& hostname = endpoint.ourname;	6✔
47	const std::string& instance_name = endpoint.instance_name;	6✔
48
49	try {	6✔
50	Socket carbonSock(server.sin4.sin_family, SOCK_STREAM);	6✔
51	carbonSock.setNonBlocking();	6✔
52	carbonSock.connect(server); // we do the connect so the attempt happens while we gather stats	6✔
53	ostringstream str;	6✔
54
55	const time_t now = time(nullptr);	6✔
56
57	{	6✔
58	auto entries = dnsdist::metrics::g_stats.entries.read_lock();	6✔
59	for (const auto& entry : *entries) {	511✔
60	str << namespace_name << "." << hostname << "." << instance_name << "." << entry.d_name << ' ';	511✔
61	if (const auto& val = std::get_if<pdns::stat_t*>(&entry.d_value)) {	511✔
62	str << (*val)->load();	252✔
63	}	252✔
64	else if (const auto& adval = std::get_if<pdns::stat_double_t*>(&entry.d_value)) {	259✔
65	str << (*adval)->load();	143✔
66	}	143✔
67	else if (const auto& func = std::get_if<dnsdist::metrics::Stats::statfunction_t>(&entry.d_value)) {	120✔
68	str << (*func)(entry.d_name);	120✔
69	}	120✔
70	str << ' ' << now << "\r\n";	511✔
71	}	511✔
72	}	6✔
73
74	for (const auto& state : dnsdist::configuration::getCurrentRuntimeConfiguration().d_backends) {	17✔
75	string serverName = state->getName().empty() ? state->d_config.remote.toStringWithPort() : state->getName();	2,147,483,647✔
76	boost::replace_all(serverName, ".", "_");	17✔
77	string base = namespace_name;	17✔
78	base += ".";	17✔
79	base += hostname;	17✔
80	base += ".";	17✔
81	base += instance_name;	17✔
82	base += ".servers.";	17✔
83	base += serverName;	17✔
84	base += ".";	17✔
85	str << base << "queries" << ' ' << state->queries.load() << " " << now << "\r\n";	17✔
86	str << base << "responses" << ' ' << state->responses.load() << " " << now << "\r\n";	17✔
87	str << base << "drops" << ' ' << state->reuseds.load() << " " << now << "\r\n";	17✔
88	str << base << "latency" << ' ' << (state->d_config.availability != DownstreamState::Availability::Down ? state->latencyUsec / 1000.0 : 0) << " " << now << "\r\n";	17✔
89	str << base << "latencytcp" << ' ' << (state->d_config.availability != DownstreamState::Availability::Down ? state->latencyUsecTCP / 1000.0 : 0) << " " << now << "\r\n";	17✔
90	str << base << "senderrors" << ' ' << state->sendErrors.load() << " " << now << "\r\n";	17✔
91	str << base << "outstanding" << ' ' << state->outstanding.load() << " " << now << "\r\n";	17✔
92	str << base << "tcpdiedsendingquery" << ' ' << state->tcpDiedSendingQuery.load() << " " << now << "\r\n";	17✔
93	str << base << "tcpdiedreaddingresponse" << ' ' << state->tcpDiedReadingResponse.load() << " " << now << "\r\n";	17✔
94	str << base << "tcpgaveup" << ' ' << state->tcpGaveUp.load() << " " << now << "\r\n";	17✔
95	str << base << "tcpreadimeouts" << ' ' << state->tcpReadTimeouts.load() << " " << now << "\r\n";	17✔
96	str << base << "tcpwritetimeouts" << ' ' << state->tcpWriteTimeouts.load() << " " << now << "\r\n";	17✔
97	str << base << "tcpconnecttimeouts" << ' ' << state->tcpConnectTimeouts.load() << " " << now << "\r\n";	17✔
98	str << base << "tcpcurrentconnections" << ' ' << state->tcpCurrentConnections.load() << " " << now << "\r\n";	17✔
99	str << base << "tcpmaxconcurrentconnections" << ' ' << state->tcpMaxConcurrentConnections.load() << " " << now << "\r\n";	17✔
100	str << base << "tcpnewconnections" << ' ' << state->tcpNewConnections.load() << " " << now << "\r\n";	17✔
101	str << base << "tcpreusedconnections" << ' ' << state->tcpReusedConnections.load() << " " << now << "\r\n";	17✔
102	str << base << "tlsresumptions" << ' ' << state->tlsResumptions.load() << " " << now << "\r\n";	17✔
103	str << base << "tcpavgqueriesperconnection" << ' ' << state->tcpAvgQueriesPerConnection.load() << " " << now << "\r\n";	17✔
104	str << base << "tcpavgconnectionduration" << ' ' << state->tcpAvgConnectionDuration.load() << " " << now << "\r\n";	17✔
105	str << base << "tcptoomanyconcurrentconnections" << ' ' << state->tcpTooManyConcurrentConnections.load() << " " << now << "\r\n";	17✔
106	str << base << "healthcheckfailures" << ' ' << state->d_healthCheckMetrics.d_failures << " " << now << "\r\n";	17✔
107	str << base << "healthcheckfailuresparsing" << ' ' << state->d_healthCheckMetrics.d_parseErrors << " " << now << "\r\n";	17✔
108	str << base << "healthcheckfailurestimeout" << ' ' << state->d_healthCheckMetrics.d_timeOuts << " " << now << "\r\n";	17✔
109	str << base << "healthcheckfailuresnetwork" << ' ' << state->d_healthCheckMetrics.d_networkErrors << " " << now << "\r\n";	17✔
110	str << base << "healthcheckfailuresmismatch" << ' ' << state->d_healthCheckMetrics.d_mismatchErrors << " " << now << "\r\n";	17✔
111	str << base << "healthcheckfailuresinvalid" << ' ' << state->d_healthCheckMetrics.d_invalidResponseErrors << " " << now << "\r\n";	17✔
112	}	17✔
113
114	std::map<std::string, uint64_t> frontendDuplicates;	6✔
115	for (const auto& front : dnsdist::getFrontends()) {	12✔
116	if (front->udpFD == -1 && front->tcpFD == -1) {	12!
117	continue;	×
118	}	×
119
120	string frontName = front->local.toStringWithPort() + (front->udpFD >= 0 ? "_udp" : "_tcp");	12✔
121	boost::replace_all(frontName, ".", "_");	12✔
122	auto dupPair = frontendDuplicates.insert({frontName, 1});	12✔
123	if (!dupPair.second) {	12!
124	frontName += "_" + std::to_string(dupPair.first->second);	×
125	++(dupPair.first->second);	×
126	}	×
127
128	string base = namespace_name;	12✔
129	base += ".";	12✔
130	base += hostname;	12✔
131	base += ".";	12✔
132	base += instance_name;	12✔
133	base += ".frontends.";	12✔
134	base += frontName;	12✔
135	base += ".";	12✔
136	str << base << "queries" << ' ' << front->queries.load() << " " << now << "\r\n";	12✔
137	str << base << "responses" << ' ' << front->responses.load() << " " << now << "\r\n";	12✔
138	str << base << "tcpdiedreadingquery" << ' ' << front->tcpDiedReadingQuery.load() << " " << now << "\r\n";	12✔
139	str << base << "tcpdiedsendingresponse" << ' ' << front->tcpDiedSendingResponse.load() << " " << now << "\r\n";	12✔
140	str << base << "tcpgaveup" << ' ' << front->tcpGaveUp.load() << " " << now << "\r\n";	12✔
141	str << base << "tcpclienttimeouts" << ' ' << front->tcpClientTimeouts.load() << " " << now << "\r\n";	12✔
142	str << base << "tcpdownstreamtimeouts" << ' ' << front->tcpDownstreamTimeouts.load() << " " << now << "\r\n";	12✔
143	str << base << "tcpcurrentconnections" << ' ' << front->tcpCurrentConnections.load() << " " << now << "\r\n";	12✔
144	str << base << "tcpmaxconcurrentconnections" << ' ' << front->tcpMaxConcurrentConnections.load() << " " << now << "\r\n";	12✔
145	str << base << "tcpavgqueriesperconnection" << ' ' << front->tcpAvgQueriesPerConnection.load() << " " << now << "\r\n";	12✔
146	str << base << "tcpavgconnectionduration" << ' ' << front->tcpAvgConnectionDuration.load() << " " << now << "\r\n";	12✔
147	str << base << "tls10-queries" << ' ' << front->tls10queries.load() << " " << now << "\r\n";	12✔
148	str << base << "tls11-queries" << ' ' << front->tls11queries.load() << " " << now << "\r\n";	12✔
149	str << base << "tls12-queries" << ' ' << front->tls12queries.load() << " " << now << "\r\n";	12✔
150	str << base << "tls13-queries" << ' ' << front->tls13queries.load() << " " << now << "\r\n";	12✔
151	str << base << "tls-unknown-queries" << ' ' << front->tlsUnknownqueries.load() << " " << now << "\r\n";	12✔
152	str << base << "tlsnewsessions" << ' ' << front->tlsNewSessions.load() << " " << now << "\r\n";	12✔
153	str << base << "tlsresumptions" << ' ' << front->tlsResumptions.load() << " " << now << "\r\n";	12✔
154	str << base << "tlsunknownticketkeys" << ' ' << front->tlsUnknownTicketKey.load() << " " << now << "\r\n";	12✔
155	str << base << "tlsinactiveticketkeys" << ' ' << front->tlsInactiveTicketKey.load() << " " << now << "\r\n";	12✔
156
157	const TLSErrorCounters* errorCounters = nullptr;	12✔
158	if (front->tlsFrontend != nullptr) {	12!
159	errorCounters = &front->tlsFrontend->d_tlsCounters;	×
160	}	×
161	else if (front->dohFrontend != nullptr) {	12!
162	errorCounters = &front->dohFrontend->d_tlsContext.d_tlsCounters;	×
163	}	×
164	if (errorCounters != nullptr) {	12!
165	str << base << "tlsdhkeytoosmall" << ' ' << errorCounters->d_dhKeyTooSmall << " " << now << "\r\n";	×
166	str << base << "tlsinappropriatefallback" << ' ' << errorCounters->d_inappropriateFallBack << " " << now << "\r\n";	×
167	str << base << "tlsnosharedcipher" << ' ' << errorCounters->d_noSharedCipher << " " << now << "\r\n";	×
168	str << base << "tlsunknownciphertype" << ' ' << errorCounters->d_unknownCipherType << " " << now << "\r\n";	×
169	str << base << "tlsunknownkeyexchangetype" << ' ' << errorCounters->d_unknownKeyExchangeType << " " << now << "\r\n";	×
170	str << base << "tlsunknownprotocol" << ' ' << errorCounters->d_unknownProtocol << " " << now << "\r\n";	×
171	str << base << "tlsunsupportedec" << ' ' << errorCounters->d_unsupportedEC << " " << now << "\r\n";	×
172	str << base << "tlsunsupportedprotocol" << ' ' << errorCounters->d_unsupportedProtocol << " " << now << "\r\n";	×
173	}	×
174	}	12✔
175
176	for (const auto& entry : dnsdist::configuration::getCurrentRuntimeConfiguration().d_pools) {	6✔
177	string poolName = entry.first;	6✔
178	boost::replace_all(poolName, ".", "_");	6✔
179	if (poolName.empty()) {	6!
180	poolName = "_default_";	6✔
181	}	6✔
182	string base = namespace_name;	6✔
183	base += ".";	6✔
184	base += hostname;	6✔
185	base += ".";	6✔
186	base += instance_name;	6✔
187	base += ".pools.";	6✔
188	base += poolName;	6✔
189	base += ".";	6✔
190	const std::shared_ptr<ServerPool> pool = entry.second;	6✔
191	str << base << "servers"	6✔
192	<< " " << pool->countServers(false) << " " << now << "\r\n";	6✔
193	str << base << "servers-up"	6✔
194	<< " " << pool->countServers(true) << " " << now << "\r\n";	6✔
195	if (pool->packetCache != nullptr) {	6!
196	const auto& cache = pool->packetCache;	×
197	str << base << "cache-size"	×
198	<< " " << cache->getMaxEntries() << " " << now << "\r\n";	×
199	str << base << "cache-entries"	×
200	<< " " << cache->getEntriesCount() << " " << now << "\r\n";	×
201	str << base << "cache-hits"	×
202	<< " " << cache->getHits() << " " << now << "\r\n";	×
203	str << base << "cache-misses"	×
204	<< " " << cache->getMisses() << " " << now << "\r\n";	×
205	str << base << "cache-deferred-inserts"	×
206	<< " " << cache->getDeferredInserts() << " " << now << "\r\n";	×
207	str << base << "cache-deferred-lookups"	×
208	<< " " << cache->getDeferredLookups() << " " << now << "\r\n";	×
209	str << base << "cache-lookup-collisions"	×
210	<< " " << cache->getLookupCollisions() << " " << now << "\r\n";	×
211	str << base << "cache-insert-collisions"	×
212	<< " " << cache->getInsertCollisions() << " " << now << "\r\n";	×
213	str << base << "cache-ttl-too-shorts"	×
214	<< " " << cache->getTTLTooShorts() << " " << now << "\r\n";	×
215	str << base << "cache-cleanup-count"	×
216	<< " " << cache->getCleanupCount() << " " << now << "\r\n";	×
217	}	×
218	}	6✔
219
220	#ifdef HAVE_DNS_OVER_HTTPS	6✔
221	{	6✔
222	std::map<std::string, uint64_t> dohFrontendDuplicates;	6✔
223	const string base = "dnsdist." + hostname + ".main.doh.";	6✔
224	for (const auto& doh : dnsdist::getDoHFrontends()) {	6!
225	string name = doh->d_tlsContext.d_addr.toStringWithPort();	×
226	boost::replace_all(name, ".", "_");	×
227	boost::replace_all(name, ":", "_");	×
228	boost::replace_all(name, "[", "_");	×
229	boost::replace_all(name, "]", "_");	×
230
231	auto dupPair = dohFrontendDuplicates.insert({name, 1});	×
232	if (!dupPair.second) {	×
233	name += "_" + std::to_string(dupPair.first->second);	×
234	++(dupPair.first->second);	×
235	}	×
236
237	const vector<pair<const char*, const pdns::stat_t&>> values{	×
238	{"http-connects", doh->d_httpconnects},	×
239	{"http1-queries", doh->d_http1Stats.d_nbQueries},	×
240	{"http2-queries", doh->d_http2Stats.d_nbQueries},	×
241	{"http1-200-responses", doh->d_http1Stats.d_nb200Responses},	×
242	{"http2-200-responses", doh->d_http2Stats.d_nb200Responses},	×
243	{"http1-400-responses", doh->d_http1Stats.d_nb400Responses},	×
244	{"http2-400-responses", doh->d_http2Stats.d_nb400Responses},	×
245	{"http1-403-responses", doh->d_http1Stats.d_nb403Responses},	×
246	{"http2-403-responses", doh->d_http2Stats.d_nb403Responses},	×
247	{"http1-500-responses", doh->d_http1Stats.d_nb500Responses},	×
248	{"http2-500-responses", doh->d_http2Stats.d_nb500Responses},	×
249	{"http1-502-responses", doh->d_http1Stats.d_nb502Responses},	×
250	{"http2-502-responses", doh->d_http2Stats.d_nb502Responses},	×
251	{"http1-other-responses", doh->d_http1Stats.d_nbOtherResponses},	×
252	{"http2-other-responses", doh->d_http2Stats.d_nbOtherResponses},	×
253	{"get-queries", doh->d_getqueries},	×
254	{"post-queries", doh->d_postqueries},	×
255	{"bad-requests", doh->d_badrequests},	×
256	{"error-responses", doh->d_errorresponses},	×
257	{"redirect-responses", doh->d_redirectresponses},	×
258	{"valid-responses", doh->d_validresponses}};	×
259
260	for (const auto& item : values) {	×
261	str << base << name << "." << item.first << " " << item.second << " " << now << "\r\n";	×
262	}	×
263	}	×
264	}	6✔
265	#endif /* HAVE_DNS_OVER_HTTPS */	6✔
266
267	{	6✔
268	std::string qname;	6✔
269	auto records = dnsdist::QueryCount::g_queryCountRecords.write_lock();	6✔
270	for (const auto& record : *records) {	6!
271	qname = record.first;	×
272	boost::replace_all(qname, ".", "_");	×
273	str << "dnsdist.querycount." << qname << ".queries " << record.second << " " << now << "\r\n";	×
274	}	×
275	records->clear();	6✔
276	}	6✔
277
278	const string msg = str.str();	6✔
279
280	int ret = waitForRWData(carbonSock.getHandle(), false, 1, 0);	6✔
281	if (ret <= 0) {	6!
282	vinfolog("Unable to write data to carbon server on %s: %s", server.toStringWithPort(), (ret < 0 ? stringerror() : "Timeout"));	×
283	return false;	×
284	}	×
285	carbonSock.setBlocking();	6✔
286	writen2(carbonSock.getHandle(), msg.c_str(), msg.size());	6✔
287	}	6✔
288	catch (const std::exception& e) {	6✔
289	warnlog("Problem sending carbon data to %s: %s", server.toStringWithPort(), e.what());	×
290	return false;	×
291	}	×
292
293	return true;	6✔
294	}	6✔
295
296	static void carbonHandler(const Carbon::Endpoint& endpoint)
297	{	2✔
298	setThreadName("dnsdist/carbon");	2✔
299	const auto intervalUSec = endpoint.interval * 1000 * 1000;	2✔
300	/* maximum interval between two attempts is 10 minutes */
301	const ExponentialBackOffTimer backOffTimer(10 * 60);	2✔
302
303	try {	2✔
304	uint8_t consecutiveFailures = 0;	2✔
305	do {	6✔
306	DTime dtimer;	6✔
307	dtimer.set();	6✔
308	if (doOneCarbonExport(endpoint)) {	6!
309	const auto elapsedUSec = dtimer.udiff();	6✔
310	if (elapsedUSec < 0 \|\| static_cast<unsigned int>(elapsedUSec) <= intervalUSec) {	6!
311	useconds_t toSleepUSec = intervalUSec - elapsedUSec;	6✔
312	usleep(toSleepUSec);	6✔
313	}	6✔
314	else {	×
315	vinfolog("Carbon export for %s took longer (%s us) than the configured interval (%d us)", endpoint.server.toStringWithPort(), elapsedUSec, intervalUSec);	×
316	}	×
317	consecutiveFailures = 0;	6✔
318	}	6✔
UNCOV 319	else {	×
UNCOV 320	const auto backOff = backOffTimer.get(consecutiveFailures);	×
UNCOV 321	if (consecutiveFailures < std::numeric_limits<decltype(consecutiveFailures)>::max()) {	×
322	consecutiveFailures++;	×
323	}	×
UNCOV 324	vinfolog("Run for %s - %s failed, next attempt in %d", endpoint.server.toStringWithPort(), endpoint.ourname, backOff);	×
UNCOV 325	std::this_thread::sleep_for(std::chrono::seconds(backOff));	×
UNCOV 326	}	×
327	} while (true);	6✔
328	}	2✔
329	catch (const PDNSException& e) {	2✔
330	errlog("Carbon thread for %s died, PDNSException: %s", endpoint.server.toStringWithPort(), e.reason);	×
331	}	×
332	catch (...) {	2✔
333	errlog("Carbon thread for %s died", endpoint.server.toStringWithPort());	×
334	}	×
335	}	2✔
336
337	Carbon::Endpoint Carbon::newEndpoint(const std::string& address, std::string ourName, uint64_t interval, const std::string& namespace_name, const std::string& instance_name)
338	{	4✔
339	if (ourName.empty()) {	4!
340	try {	×
341	ourName = getCarbonHostName();	×
342	}	×
343	catch (const std::exception& exp) {	×
344	throw std::runtime_error(std::string("The 'ourname' setting in 'carbonServer()' has not been set and we are unable to determine the system's hostname: ") + exp.what());	×
345	}	×
346	}	×
347	return Carbon::Endpoint{ComboAddress(address, 2003),	4✔
348	!namespace_name.empty() ? namespace_name : "dnsdist",	4!
349	std::move(ourName),	4✔
350	!instance_name.empty() ? instance_name : "main",	4!
351	interval < std::numeric_limits<unsigned int>::max() ? static_cast<unsigned int>(interval) : 30};	4!
352	}	4✔
353
354	void Carbon::run(const std::vector<Carbon::Endpoint>& endpoints)
355	{	315✔
356	for (const auto& endpoint : endpoints) {	315✔
357	std::thread newHandler(carbonHandler, endpoint);	2✔
358	newHandler.detach();	2✔
359	}	2✔
360	}	315✔
361
362	}
363	#endif /* DISABLE_CARBON */
364
365	static time_t s_start = time(nullptr);
366
367	uint64_t uptimeOfProcess(const std::string& str)
368	{	215✔
369	return time(nullptr) - s_start;	215✔
370	}	215✔

PowerDNS / pdns / 10850027583

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