pdns/dynlistener.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_DYNLISTENER
  23 #define PDNS_DYNLISTENER
  24
  25 #include <string>
  26 #include <vector>
  27 #include <pthread.h>
  28 #include <sys/types.h>
  29 #include <errno.h>
  30 #include <iostream>
  31 #include <sstream>
  32 #include "iputils.hh"
  33 #include <boost/utility.hpp>
  34 #include <unistd.h>
  35 #include <sys/un.h>
  36 #include <dlfcn.h>
  37 #include <sys/socket.h>
  38 #include <netinet/in.h>
  39
  40 #include "namespaces.hh"
  41
  42 class DynListener : public boost::noncopyable
  43 {
  44 public:
  45   explicit DynListener(const string &pname="");
  46   explicit DynListener(const ComboAddress& addr);
  47   ~DynListener();
  48   void go();
  49   void theListener();
  50   static void *theListenerHelper(void *p);
  51
  52   typedef string g_funk_t(const vector<string> &parts, Utility::pid_t ppid); // guido!
  53   typedef struct { g_funk_t *func; string args; string usage; } g_funkwithusage_t;
  54   typedef map<string,g_funkwithusage_t> g_funkdb_t;
  55
  56   static void registerFunc(const string &name, g_funk_t *gf, const string &usage="", const string &args="");
  57   static void registerRestFunc(g_funk_t *gf);
  58   static g_funk_t* getFunc(const string& fname) { return s_funcdb[fname].func; }
  59 private:
  60   void sendlines(const string &lines);
  61   string getHelp();
  62   string getLine();
  63
  64   void listenOnUnixDomain(const std::string& fname);
  65   void listenOnTCP(const ComboAddress&);
  66   void createSocketAndBind(int family, struct sockaddr*local, size_t len);
  67
  68   NetmaskGroup d_tcprange;
  69   int d_s;
  70   int d_client;
  71   pthread_t d_tid;
  72   bool d_nonlocal;
  73   bool d_tcp;
  74   pid_t d_ppid;
  75
  76   string d_socketname;
  77   ComboAddress d_socketaddress;
  78   static g_funkdb_t s_funcdb;
  79   static g_funk_t* s_restfunc;
  80   bool testLive(const string& fname);
  81 };
  82 #endif /* PDNS_DYNLISTENER */