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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) 2007-2009 Othmar Gsenger, Erwin Nindl,
* Christian Pointner <satp@wirdorange.org>
*
* This file is part of Anytun.
*
* Anytun is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* Anytun 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 anytun. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _SIGNAL_CONTROLLER_H_
#define _SIGNAL_CONTROLLER_H_
#include <map>
#include <queue>
#include "threadUtils.hpp"
#ifndef _MSC_VER
#include <csignal>
#endif
#define SIGERROR -1
class SignalHandler
{
public:
virtual ~SignalHandler() {}
virtual int handle() { return 0; }
virtual int handle(const std::string& msg) { return 0; }
protected:
SignalHandler(int s) : sigNum(s) {}
private:
int sigNum;
friend class SignalController;
};
class SigErrorHandler : public SignalHandler
{
public:
SigErrorHandler() : SignalHandler(SIGERROR) {}
int handle(const std::string& msg);
};
#ifndef _MSC_VER
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();
};
#else
class CtrlCHandler : public SignalHandler
{
public:
CtrlCHandler() : SignalHandler(CTRL_C_EVENT) {}
int handle();
};
class CtrlBreakHandler : public SignalHandler
{
public:
CtrlBreakHandler() : SignalHandler(CTRL_BREAK_EVENT) {}
int handle();
};
class CtrlCloseHandler : public SignalHandler
{
public:
CtrlCloseHandler() : SignalHandler(CTRL_BREAK_EVENT) {}
int handle();
};
class CtrlLogoffHandler : public SignalHandler
{
public:
CtrlLogoffHandler() : SignalHandler(CTRL_BREAK_EVENT) {}
int handle();
};
class CtrlShutdownHandler : public SignalHandler
{
public:
CtrlShutdownHandler() : SignalHandler(CTRL_BREAK_EVENT) {}
int handle();
};
#endif
class SignalController
{
public:
static SignalController& instance();
#ifndef _MSC_VER
void handle();
#else
static bool handle(DWORD ctrlType);
#endif
void init();
int run();
void inject(int sig, const std::string& msg = "");
private:
typedef std::map<int, SignalHandler*> HandlerMap;
SignalController() {};
~SignalController();
SignalController(const SignalController &s);
void operator=(const SignalController &s);
static SignalController* inst;
static Mutex instMutex;
class instanceCleaner {
public: ~instanceCleaner() {
if(SignalController::inst != NULL)
delete SignalController::inst;
}
};
friend class instanceCleaner;
typedef std::pair<int, std::string> SigPair;
std::queue<SigPair> sigQueue;
Mutex sigQueueMutex;
Semaphore sigQueueSem;
HandlerMap handler;
};
extern SignalController& gSignalController;
#endif
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