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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 ANYTUN_signalHandler_hpp_INCLUDED
#define ANYTUN_signalHandler_hpp_INCLUDED
#include <csignal>
#include <boost/thread.hpp>
#include <boost/bind.hpp>
int SigIntHandler(int /*sig*/, const std::string& /*msg*/)
{
cLog.msg(Log::PRIO_NOTICE) << "SIG-Int caught, exiting";
return 1;
}
int SigQuitHandler(int /*sig*/, const std::string& /*msg*/)
{
cLog.msg(Log::PRIO_NOTICE) << "SIG-Quit caught, exiting";
return 1;
}
int SigHupHandler(int /*sig*/, const std::string& /*msg*/)
{
cLog.msg(Log::PRIO_NOTICE) << "SIG-Hup caught";
return 0;
}
int SigTermHandler(int /*sig*/, const std::string& /*msg*/)
{
cLog.msg(Log::PRIO_NOTICE) << "SIG-Term caught, exiting";
return 1;
}
int SigUsr1Handler(int /*sig*/, const std::string& /*msg*/)
{
cLog.msg(Log::PRIO_NOTICE) << "SIG-Usr1 caught";
return 0;
}
int SigUsr2Handler(int /*sig*/, const std::string& /*msg*/)
{
cLog.msg(Log::PRIO_NOTICE) << "SIG-Usr2 caught";
return 0;
}
void handleSignal()
{
struct timespec timeout;
sigset_t signal_set;
int sigNum;
while(1) {
sigemptyset(&signal_set);
sigaddset(&signal_set, SIGINT);
sigaddset(&signal_set, SIGQUIT);
sigaddset(&signal_set, SIGHUP);
sigaddset(&signal_set, SIGTERM);
sigaddset(&signal_set, SIGUSR1);
sigaddset(&signal_set, SIGUSR2);
timeout.tv_sec = 1;
timeout.tv_nsec = 0;
sigNum = sigtimedwait(&signal_set, NULL, &timeout);
if (sigNum == -1) {
if (errno != EINTR && errno != EAGAIN) {
cLog.msg(Log::PRIO_ERROR) << "sigwait failed with error: \"" << AnytunErrno(errno) << "\" SignalHandling will be disabled";
break;
}
} else {
gSignalController.inject(sigNum);
}
}
}
void registerSignalHandler(SignalController& ctrl, DaemonService& /*service*/)
{
sigset_t signal_set;
sigemptyset(&signal_set);
sigaddset(&signal_set, SIGINT);
sigaddset(&signal_set, SIGQUIT);
sigaddset(&signal_set, SIGHUP);
sigaddset(&signal_set, SIGTERM);
sigaddset(&signal_set, SIGUSR1);
sigaddset(&signal_set, SIGUSR2);
#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(handleSignal));
ctrl.handler[SIGINT] = boost::bind(SigIntHandler, _1, _2);
ctrl.handler[SIGQUIT] = boost::bind(SigQuitHandler, _1, _2);
ctrl.handler[SIGHUP] = boost::bind(SigHupHandler, _1, _2);
ctrl.handler[SIGTERM] = boost::bind(SigTermHandler, _1, _2);
ctrl.handler[SIGUSR1] = boost::bind(SigUsr1Handler, _1, _2);
ctrl.handler[SIGUSR2] = boost::bind(SigUsr2Handler, _1, _2);
cLog.msg(Log::PRIO_DEBUG) << "signal handlers are now registered";
}
#endif
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