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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) 2007-2008 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 version 3 as
* published by the Free Software Foundation.
*
* 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/>.
*/
#include <map>
#include <iostream>
#include "signalController.h"
#include "log.h"
#include "anytunError.h"
#include "threadUtils.hpp"
#ifndef _MSC_VER
#include <csignal>
#include <boost/bind.hpp>
#else
#include <windows.h>
#endif
SignalController* SignalController::inst = NULL;
Mutex SignalController::instMutex;
SignalController& gSignalController = SignalController::instance();
SignalController& SignalController::instance()
{
Lock lock(instMutex);
static instanceCleaner c;
if(!inst)
inst = new SignalController();
return *inst;
}
int SigErrorHandler::handle(const std::string& msg)
{
AnytunError::throwErr() << msg;
return 0;
}
#ifndef _MSC_VER
int SigIntHandler::handle()
{
cLog.msg(Log::PRIO_NOTICE) << "SIG-Int caught, exiting";
return 1;
}
int SigQuitHandler::handle()
{
cLog.msg(Log::PRIO_NOTICE) << "SIG-Quit caught, exiting";
return 1;
}
int SigHupHandler::handle()
{
cLog.msg(Log::PRIO_NOTICE) << "SIG-Hup caught";
return 0;
}
int SigTermHandler::handle()
{
cLog.msg(Log::PRIO_NOTICE) << "SIG-Term caughtm, exiting";
return 1;
}
int SigUsr1Handler::handle()
{
cLog.msg(Log::PRIO_NOTICE) << "SIG-Usr1 caught";
return 0;
}
int SigUsr2Handler::handle()
{
cLog.msg(Log::PRIO_NOTICE) << "SIG-Usr2 caught";
return 0;
}
#else
int CtrlCHandler::handle()
{
cLog.msg(Log::PRIO_NOTICE) << "CTRL-C Event received, exitting";
return 1;
}
int CtrlBreakHandler::handle()
{
cLog.msg(Log::PRIO_NOTICE) << "CTRL-Break Event received, ignoring";
return 0;
}
int CtrlCloseHandler::handle()
{
cLog.msg(Log::PRIO_NOTICE) << "Close Event received, exitting";
return 1;
}
int CtrlLogoffHandler::handle()
{
cLog.msg(Log::PRIO_NOTICE) << "LogOff Event received, exitting";
return 1;
}
int CtrlShutdownHandler::handle()
{
cLog.msg(Log::PRIO_NOTICE) << "Shutdown Event received, exitting";
return 1;
}
#endif
SignalController::~SignalController()
{
for(HandlerMap::iterator it = handler.begin(); it != handler.end(); ++it)
delete it->second;
}
#ifndef _MSC_VER
void SignalController::handle()
{
sigset_t signal_set;
int sigNum;
while(1)
{
sigfillset(&signal_set);
sigwait(&signal_set, &sigNum);
inject(sigNum);
}
}
#else
bool SignalController::handle(DWORD ctrlType)
{
gSignalController.inject(ctrlType);
return true;
}
#endif
void SignalController::init()
{
#ifndef _MSC_VER
sigset_t signal_set;
sigfillset(&signal_set);
sigdelset(&signal_set, SIGCHLD);
sigdelset(&signal_set, SIGSEGV);
sigdelset(&signal_set, SIGBUS);
sigdelset(&signal_set, SIGFPE);
#if defined(BOOST_HAS_PTHREADS)
pthread_sigmask(SIG_BLOCK, &signal_set, NULL);
#else
#error The signalhandler works only with pthreads
#endif
boost::thread(boost::bind(&SignalController::handle, this));
handler[SIGINT] = new SigIntHandler;
handler[SIGQUIT] = new SigQuitHandler;
handler[SIGHUP] = new SigHupHandler;
handler[SIGTERM] = new SigTermHandler;
handler[SIGUSR1] = new SigUsr1Handler;
handler[SIGUSR2] = new SigUsr2Handler;
#else
if(!SetConsoleCtrlHandler((PHANDLER_ROUTINE)SignalController::handle, true))
AnytunError::throwErr() << "Error on SetConsoleCtrlhandler: " << AnytunErrno(GetLastError());
handler[CTRL_C_EVENT] = new CtrlCHandler;
handler[CTRL_BREAK_EVENT] = new CtrlBreakHandler;
handler[CTRL_CLOSE_EVENT] = new CtrlCloseHandler;
handler[CTRL_LOGOFF_EVENT] = new CtrlLogoffHandler;
handler[CTRL_SHUTDOWN_EVENT] = new CtrlShutdownHandler;
#endif
handler[SIGERROR] = new SigErrorHandler;
}
void SignalController::inject(int sig, const std::string& msg)
{
{
Lock lock(sigQueueMutex);
sigQueue.push(SigPair(sig, msg));
}
sigQueueSem.up();
}
int SignalController::run()
{
while(1) {
sigQueueSem.down();
SigPair sig;
{
Lock lock(sigQueueMutex);
sig = sigQueue.front();
sigQueue.pop();
}
HandlerMap::iterator it = handler.find(sig.first);
if(it != handler.end())
{
int ret;
if(sig.second == "")
ret = it->second->handle();
else
ret = it->second->handle(sig.second);
if(ret)
return ret;
}
else
cLog.msg(Log::PRIO_NOTICE) << "SIG " << sig.first << " caught with message '" << sig.second << "' - ignoring";
}
return 0;
}
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