src/signalController.h

   1 /*
   2  *  anytun
   3  *
   4  *  The secure anycast tunneling protocol (satp) defines a protocol used
   5  *  for communication between any combination of unicast and anycast
   6  *  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
   7  *  mode and allows tunneling of every ETHER TYPE protocol (e.g.
   8  *  ethernet, ip, arp ...). satp directly includes cryptography and
   9  *  message authentication based on the methodes used by SRTP.  It is
  10  *  intended to deliver a generic, scaleable and secure solution for
  11  *  tunneling and relaying of packets of any protocol.
  12  *
  13  *
  14  *  Copyright (C) 2007-2008 Othmar Gsenger, Erwin Nindl,
  15  *                          Christian Pointner <satp@wirdorange.org>
  16  *
  17  *  This file is part of Anytun.
  18  *
  19  *  Anytun is free software: you can redistribute it and/or modify
  20  *  it under the terms of the GNU General Public License version 3 as
  21  *  published by the Free Software Foundation.
  22  *
  23  *  Anytun is distributed in the hope that it will be useful,
  24  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  *  GNU General Public License for more details.
  27  *
  28  *  You should have received a copy of the GNU General Public License
  29  *  along with anytun.  If not, see <http://www.gnu.org/licenses/>.
  30  */
  31
  32 #ifndef _SIGNAL_CONTROLLER_H_
  33 #define _SIGNAL_CONTROLLER_H_
  34
  35 #include <csignal>
  36 #include <map>
  37 #include <queue>
  38
  39 #include "threadUtils.hpp"
  40
  41 class SignalHandler
  42 {
  43 public:
  44   virtual ~SignalHandler() {}
  45
  46   virtual int handle() { return 0; }
  47
  48 protected:
  49   SignalHandler(int s) : sigNum(s) {}
  50
  51 private:
  52   int sigNum;
  53   friend class SignalController;
  54 };
  55
  56 class SigIntHandler : public SignalHandler
  57 {
  58 public:
  59   SigIntHandler() : SignalHandler(SIGINT) {}
  60   int handle();
  61 };
  62
  63 class SigQuitHandler : public SignalHandler
  64 {
  65 public:
  66   SigQuitHandler() : SignalHandler(SIGQUIT) {}
  67   int handle();
  68 };
  69
  70 class SigHupHandler : public SignalHandler
  71 {
  72 public:
  73   SigHupHandler() : SignalHandler(SIGHUP) {}
  74   int handle();
  75 };
  76
  77 class SigUsr1Handler : public SignalHandler
  78 {
  79 public:
  80   SigUsr1Handler() : SignalHandler(SIGUSR1) {}
  81   int handle();
  82 };
  83
  84 class SigUsr2Handler : public SignalHandler
  85 {
  86 public:
  87   SigUsr2Handler() : SignalHandler(SIGUSR2) {}
  88   int handle();
  89 };
  90
  91 class SigTermHandler : public SignalHandler
  92 {
  93 public:
  94   SigTermHandler() : SignalHandler(SIGTERM) {}
  95   int handle();
  96 };
  97
  98 class SignalController
  99 {
 100 public:
 101   SignalController() { thread = NULL; }
 102   ~SignalController();
 103   static void handle(void* s);
 104
 105   void init();
 106   int run();
 107
 108 private:
 109   typedef std::map<int, SignalHandler*> HandlerMap;
 110
 111   SignalController(const SignalController &s);
 112   void operator=(const SignalController &s);
 113
 114   std::queue<int> sigQueue;
 115   Mutex sigQueueMutex;
 116   Semaphore sigQueueSem;
 117
 118   boost::thread* thread;
 119   HandlerMap handler;
 120 };
 121
 122 #endif