pdns/fstrm_logger.hh

   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 #pragma once
  23 #include "config.h"
  24 #include "remote_logger.hh"
  25
  26 #ifdef HAVE_FSTRM
  27
  28 #include <unordered_map>
  29 #include <fstrm.h>
  30 #include <fstrm/iothr.h>
  31 #include <fstrm/unix_writer.h>
  32 #ifdef HAVE_FSTRM_TCP_WRITER_INIT
  33 #include <fstrm/tcp_writer.h>
  34 #endif
  35
  36 class FrameStreamLogger : public RemoteLoggerInterface, boost::noncopyable
  37 {
  38 public:
  39   FrameStreamLogger(int family, const std::string& address, bool connect, const std::unordered_map<string,unsigned>& options = std::unordered_map<string,unsigned>());
  40   ~FrameStreamLogger();
  41   [[nodiscard]] RemoteLoggerInterface::Result queueData(const std::string& data) override;
  42
  43   [[nodiscard]] std::string address() const override
  44   {
  45     return d_address;
  46   }
  47
  48   [[nodiscard]] std::string name() const override
  49   {
  50     return "dnstap";
  51   }
  52
  53   [[nodiscard]] std::string toString() override
  54   {
  55     return "FrameStreamLogger to " + d_address + " (" + std::to_string(d_framesSent) + " frames sent, " + std::to_string(d_queueFullDrops) + " dropped, " + std::to_string(d_permanentFailures) + " permanent failures)";
  56   }
  57
  58   [[nodiscard]] RemoteLoggerInterface::Stats getStats() override
  59   {
  60     return Stats{.d_queued = d_framesSent,
  61                  .d_pipeFull = d_queueFullDrops,
  62                  .d_tooLarge = 0,
  63                  .d_otherError = d_permanentFailures
  64     };
  65   }
  66
  67 private:
  68
  69   const int d_family;
  70   const std::string d_address;
  71   struct fstrm_iothr_queue *d_ioqueue{nullptr};
  72   struct fstrm_writer_options *d_fwopt{nullptr};
  73   struct fstrm_unix_writer_options *d_uwopt{nullptr};
  74 #ifdef HAVE_FSTRM_TCP_WRITER_INIT
  75   struct fstrm_tcp_writer_options *d_twopt{nullptr};
  76 #endif
  77   struct fstrm_writer *d_writer{nullptr};
  78   struct fstrm_iothr_options *d_iothropt{nullptr};
  79   struct fstrm_iothr *d_iothr{nullptr};
  80   std::atomic<uint64_t> d_framesSent{0};
  81   std::atomic<uint64_t> d_queueFullDrops{0};
  82   std::atomic<uint64_t> d_permanentFailures{0};
  83
  84   void cleanup();
  85 };
  86
  87 #else
  88 class FrameStreamLogger : public RemoteLoggerInterface, boost::noncopyable {};
  89 #endif /* HAVE_FSTRM */