1 files changed, 80 insertions, 0 deletions

diff --git a/src/signal.c b/src/signal.c
new file mode 100644
index 0000000..bb42331
--- /dev/null
+++ b/src/signal.c
@@ -0,0 +1,80 @@
+/*
+ *  ľAnytun
+ *
+ *  ľAnytun is a tiny implementation of SATP. Unlike Anytun which is a full
+ *  featured implementation ľAnytun has no support for multiple connections
+ *  or synchronisation. It is a small single threaded implementation intended
+ *  to act as a client on small platforms.
+ *  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 Christian Pointner <equinox@anytun.org>
+ *
+ *  This file is part of ľAnytun.
+ *
+ *  ľAnytun 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.
+ *
+ *  ľAnytun 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 ľAnytun. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "log.h"
+#include "signal.h"
+#include <signal.h>
+
+volatile sig_atomic_t signal_exit = 0;
+
+void signal_init()
+{
+  signal(SIGINT, handle_signal_exit);
+  signal(SIGQUIT, handle_signal_exit);
+  signal(SIGTERM, handle_signal_exit);
+
+  signal(SIGHUP, handle_signal);
+  signal(SIGUSR1, handle_signal);
+  signal(SIGUSR2, handle_signal);
+}
+
+void handle_signal(int sig)
+{
+  switch(sig) {
+  case SIGHUP: log_printf(NOTICE, "SIG-Hup caught"); break;
+  case SIGUSR1: log_printf(NOTICE, "SIG-Usr1 caught"); break;
+  case SIGUSR2: log_printf(NOTICE, "SIG-Usr2 caught"); break;
+  default: log_printf(NOTICE, "Signal %d caught, ignoring", sig); break;
+  }
+}
+
+void handle_signal_exit(int sig)
+{
+  switch(sig) {
+  case SIGINT: log_printf(NOTICE, "SIG-Int caught, exiting"); break;
+  case SIGQUIT: log_printf(NOTICE, "SIG-Quit caught, exiting"); break;
+  case SIGTERM: log_printf(NOTICE, "SIG-Term caught, exiting"); break;
+  default: log_printf(NOTICE, "Signal %d caught, ignoring", sig); return;
+  }
+
+  if (signal_exit)
+    raise (sig);
+  signal_exit = 1;
+ 
+  // do cleanup here
+
+  signal (sig, SIG_DFL);
+  raise (sig);
+}
+