pdns/rec_channel.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 #ifndef PDNS_REC_CHANNEL
  23 #define PDNS_REC_CHANNEL
  24 #include <string>
  25 #include <map>
  26 #include <vector>
  27 #include <inttypes.h>
  28 #include <sys/un.h>
  29 #include <pthread.h>
  30 #include "iputils.hh"
  31 #include "dnsname.hh"
  32 #include <atomic>
  33
  34 /** this class is used both to send and answer channel commands to the PowerDNS Recursor */
  35 class RecursorControlChannel
  36 {
  37 public:
  38   RecursorControlChannel();
  39
  40   ~RecursorControlChannel();
  41
  42   int listen(const std::string& filename);
  43   void connect(const std::string& path, const std::string& filename);
  44
  45   uint64_t getStat(const std::string& name);
  46
  47   void send(const std::string& msg, const std::string* remote=0);
  48   std::string recv(std::string* remote=0, unsigned int timeout=5);
  49
  50   int d_fd;
  51 private:
  52   struct sockaddr_un d_local;
  53 };
  54
  55 class RecursorControlParser
  56 {
  57 public:
  58   RecursorControlParser();
  59   static void nop(void){}
  60   typedef void func_t(void);
  61   std::string getAnswer(const std::string& question, func_t** func);
  62 private:
  63   static bool s_init;
  64 };
  65
  66 std::map<std::string, std::string> getAllStatsMap();
  67 extern pthread_mutex_t g_carbon_config_lock;
  68 void sortPublicSuffixList();
  69 std::vector<std::pair<DNSName, uint16_t> >* pleaseGetQueryRing();
  70 std::vector<std::pair<DNSName, uint16_t> >* pleaseGetServfailQueryRing();
  71 std::vector<ComboAddress>* pleaseGetRemotes();
  72 std::vector<ComboAddress>* pleaseGetServfailRemotes();
  73 std::vector<ComboAddress>* pleaseGetLargeAnswerRemotes();
  74 DNSName getRegisteredName(const DNSName& dom);
  75 std::atomic<unsigned long>* getDynMetric(const std::string& str);
  76 #endif