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+/*
+ *  anytun
+ *
+ *  The secure anycast tunneling protocol (satp) defines a protocol used
+ *  for communication between any combination of unicast and anycast
+ *  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
+ *  mode and allows tunneling of every ETHER TYPE protocol (e.g.
+ *  ethernet, ip, arp ...). satp directly includes cryptography and
+ *  message authentication based on the methodes used by SRTP.  It is
+ *  intended to deliver a generic, scaleable and secure solution for
+ *  tunneling and relaying of packets of any protocol.
+ *
+ *
+ *  Copyright (C) 2007 anytun.org <satp@wirdorange.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2
+ *  as published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program (see the file COPYING included with this
+ *  distribution); if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef _SIGNAL_CONTROLLER_H_
+#define _SIGNAL_CONTROLLER_H_
+
+#include <csignal>
+#include <map>
+#include <queue>
+
+#include "threadUtils.hpp"
+
+class SignalHandler
+{
+public:
+  virtual ~SignalHandler() {}
+
+  virtual int handle() { return 0; }
+
+protected:
+  SignalHandler(int s) : sigNum(s) {}
+
+private:
+  int sigNum;
+  friend class SignalController;
+};
+
+class SigIntHandler : public SignalHandler
+{
+public:
+  SigIntHandler() : SignalHandler(SIGINT) {}
+  int handle();
+};
+
+class SigQuitHandler : public SignalHandler
+{
+public:
+  SigQuitHandler() : SignalHandler(SIGQUIT) {}
+  int handle();
+};
+
+class SigHupHandler : public SignalHandler
+{
+public:
+  SigHupHandler() : SignalHandler(SIGHUP) {}
+  int handle();
+};
+
+class SigUsr1Handler : public SignalHandler
+{
+public:
+  SigUsr1Handler() : SignalHandler(SIGUSR1) {}
+  int handle();
+};
+
+class SigUsr2Handler : public SignalHandler
+{
+public:
+  SigUsr2Handler() : SignalHandler(SIGUSR2) {}
+  int handle();
+};
+
+class SigTermHandler : public SignalHandler
+{
+public:
+  SigTermHandler() : SignalHandler(SIGTERM) {}
+  int handle();
+};
+
+class SignalController
+{
+public:
+  SignalController() {}
+  ~SignalController();
+  static void* handle(void* s);
+
+  void init();
+  int run();
+
+private:
+  typedef std::map<int, SignalHandler*> HandlerMap;
+
+  SignalController(const SignalController &s);
+  void operator=(const SignalController &s);
+  
+  std::queue<int> sigQueue;
+  Mutex sigQueueMutex;
+  Semaphore sigQueueSem;
+
+  pthread_t thread;
+  HandlerMap handler;
+};
+
+#endif