splitted signalController and SignalHandlers

1 files changed, 153 insertions, 0 deletions

diff --git a/src/posix/signalHandler.hpp b/src/posix/signalHandler.hpp
new file mode 100644
index 0000000..92a66bd
--- /dev/null
+++ b/src/posix/signalHandler.hpp
@@ -0,0 +1,153 @@
+/*
+ *  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