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 anytun.org <satp@wirdorange.org>
  15  *
  16  *  This program is free software; you can redistribute it and/or modify
  17  *  it under the terms of the GNU General Public License version 2
  18  *  as published by the Free Software Foundation.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  *  GNU General Public License for more details.
  24  *
  25  *  You should have received a copy of the GNU General Public License
  26  *  along with this program (see the file COPYING included with this
  27  *  distribution); if not, write to the Free Software Foundation, Inc.,
  28  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  29  */
  30
  31 #ifndef _SIGNAL_CONTROLLER_H_
  32 #define _SIGNAL_CONTROLLER_H_
  33
  34 #include <csignal>
  35 #include <map>
  36 #include <queue>
  37
  38 #include "threadUtils.hpp"
  39
  40 class SignalHandler
  41 {
  42 public:
  43   virtual ~SignalHandler() {}
  44
  45   virtual int handle() { return 0; }
  46
  47 protected:
  48   SignalHandler(int s) : sigNum(s) {}
  49
  50 private:
  51   int sigNum;
  52   friend class SignalController;
  53 };
  54
  55 class SigIntHandler : public SignalHandler
  56 {
  57 public:
  58   SigIntHandler() : SignalHandler(SIGINT) {}
  59   int handle();
  60 };
  61
  62 class SigQuitHandler : public SignalHandler
  63 {
  64 public:
  65   SigQuitHandler() : SignalHandler(SIGQUIT) {}
  66   int handle();
  67 };
  68
  69 class SigHupHandler : public SignalHandler
  70 {
  71 public:
  72   SigHupHandler() : SignalHandler(SIGHUP) {}
  73   int handle();
  74 };
  75
  76 class SigUsr1Handler : public SignalHandler
  77 {
  78 public:
  79   SigUsr1Handler() : SignalHandler(SIGUSR1) {}
  80   int handle();
  81 };
  82
  83 class SigUsr2Handler : public SignalHandler
  84 {
  85 public:
  86   SigUsr2Handler() : SignalHandler(SIGUSR2) {}
  87   int handle();
  88 };
  89
  90 class SigTermHandler : public SignalHandler
  91 {
  92 public:
  93   SigTermHandler() : SignalHandler(SIGTERM) {}
  94   int handle();
  95 };
  96
  97 class SignalController
  98 {
  99 public:
 100   SignalController() {}
 101   ~SignalController();
 102   static void* handle(void* s);
 103
 104   void init();
 105   int run();
 106
 107 private:
 108   typedef std::map<int, SignalHandler*> HandlerMap;
 109
 110   SignalController(const SignalController &s);
 111   void operator=(const SignalController &s);
 112
 113   std::queue<int> sigQueue;
 114   Mutex sigQueueMutex;
 115   Semaphore sigQueueSem;
 116
 117   pthread_t thread;
 118   HandlerMap handler;
 119 };
 120
 121 #endif