Ignore SIGUSR1/SIGHUP during exit notification

This allows exit notification to complete and finally trigger SIGTERM.
The current practice of allowing a restart in this state clears
the exit notification timer data and thus loses the SIGTERM.

Trac #687

Signed-off-by: Selva Nair <selva.nair@gmail.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <1465274660-11009-2-git-send-email-selva.nair@gmail.com>
URL: http://article.gmane.org/gmane.network.openvpn.devel/11814
Signed-off-by: Gert Doering <gert@greenie.muc.de>

1 files changed, 24 insertions, 1 deletions

diff --git a/src/openvpn/sig.c b/src/openvpn/sig.c
index f903fc0..718b786 100644
--- a/src/openvpn/sig.c
+++ b/src/openvpn/sig.c
@@ -376,12 +376,35 @@ process_sigterm (struct context *c)
   return ret;
 }
 
+/**
+ * If a restart signal is received during exit-notification, reset the
+ * signal and return true.
+ */
+static bool
+ignore_restart_signals (struct context *c)
+{
+  bool ret = false;
+#ifdef ENABLE_OCC
+  if ( (c->sig->signal_received == SIGUSR1 || c->sig->signal_received == SIGHUP) &&
+        event_timeout_defined(&c->c2.explicit_exit_notification_interval) )
+    {
+       msg (M_INFO, "Ignoring %s received during exit notification",
+            signal_name(c->sig->signal_received, true));
+       signal_reset (c->sig);
+       ret = true;
+    }
+#endif
+  return ret;
+}
+
 bool
 process_signal (struct context *c)
 {
   bool ret = true;
 
-  if (c->sig->signal_received == SIGTERM || c->sig->signal_received == SIGINT)
+  if (ignore_restart_signals (c))
+    ret = false;
+  else if (c->sig->signal_received == SIGTERM || c->sig->signal_received == SIGINT)
     {
       ret = process_sigterm (c);
     }