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-rw-r--r--src/posix/signalHandler.hpp153
1 files changed, 153 insertions, 0 deletions
diff --git a/src/posix/signalHandler.hpp b/src/posix/signalHandler.hpp
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+++ b/src/posix/signalHandler.hpp
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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_h_INCLUDED
+#define ANYTUN_signalHandler_h_INCLUDED
+
+#include <csignal>
+#include <boost/thread.hpp>
+#include <boost/bind.hpp>
+
+class SigIntHandler : public SignalHandler
+{
+public:
+ SigIntHandler() : SignalHandler(SIGINT) {}
+ int handle()
+ {
+ cLog.msg(Log::PRIO_NOTICE) << "SIG-Int caught, exiting";
+ return 1;
+ }
+};
+
+class SigQuitHandler : public SignalHandler
+{
+public:
+ SigQuitHandler() : SignalHandler(SIGQUIT) {}
+ int handle()
+ {
+ cLog.msg(Log::PRIO_NOTICE) << "SIG-Quit caught, exiting";
+ return 1;
+ }
+};
+
+class SigHupHandler : public SignalHandler
+{
+public:
+ SigHupHandler() : SignalHandler(SIGHUP) {}
+ int handle()
+ {
+ cLog.msg(Log::PRIO_NOTICE) << "SIG-Hup caught";
+ return 0;
+ }
+};
+
+class SigUsr1Handler : public SignalHandler
+{
+public:
+ SigUsr1Handler() : SignalHandler(SIGUSR1) {}
+ int handle()
+ {
+ cLog.msg(Log::PRIO_NOTICE) << "SIG-Term caught, exiting";
+ return 1;
+ }
+};
+
+class SigUsr2Handler : public SignalHandler
+{
+public:
+ SigUsr2Handler() : SignalHandler(SIGUSR2) {}
+ int handle()
+ {
+ cLog.msg(Log::PRIO_NOTICE) << "SIG-Usr1 caught";
+ return 0;
+ }
+};
+
+class SigTermHandler : public SignalHandler
+{
+public:
+ SigTermHandler() : SignalHandler(SIGTERM) {}
+ int handle()
+ {
+ cLog.msg(Log::PRIO_NOTICE) << "SIG-Usr2 caught";
+ return 0;
+ }
+};
+
+void handle()
+{
+ sigset_t signal_set;
+ int sigNum;
+ int err = 0;
+ while(1) {
+ sigfillset(&signal_set);
+ err = sigwait(&signal_set, &sigNum);
+ if (err) {
+ if (err != EINTR && errno != EINTR ) {
+ cLog.msg(Log::PRIO_ERROR) << "sigwait failed with error: \"" << AnytunErrno(errno) << "\" SignalHandling will be disabled";
+ break;
+ }
+ } else {
+ gSignalController.inject(sigNum);
+ }
+ }
+}
+
+void registerSignalHandler(SignalController& ctrl)
+{
+ 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(handle));
+
+ ctrl.handler[SIGINT] = new SigIntHandler;
+ ctrl.handler[SIGQUIT] = new SigQuitHandler;
+ ctrl.handler[SIGHUP] = new SigHupHandler;
+ ctrl.handler[SIGTERM] = new SigTermHandler;
+ ctrl.handler[SIGUSR1] = new SigUsr1Handler;
+ ctrl.handler[SIGUSR2] = new SigUsr2Handler;
+
+ cLog.msg(Log::PRIO_DEBUG) << "signal handlers are now registered";
+}
+
+#endif