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-rw-r--r--interval.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/interval.c b/interval.c
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+++ b/interval.c
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+/*
+ * OpenVPN -- An application to securely tunnel IP networks
+ * over a single TCP/UDP port, with support for SSL/TLS-based
+ * session authentication and key exchange,
+ * packet encryption, packet authentication, and
+ * packet compression.
+ *
+ * Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program 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 this program (see the file COPYING included with this
+ * distribution); if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "syshead.h"
+
+#include "interval.h"
+
+#include "memdbg.h"
+
+void
+interval_init (struct interval *top, int horizon, int refresh)
+{
+ CLEAR (*top);
+ top->refresh = refresh;
+ top->horizon = horizon;
+}
+
+bool
+event_timeout_trigger (struct event_timeout *et,
+ struct timeval *tv,
+ const int et_const_retry)
+{
+ bool ret = false;
+ const time_t local_now = now;
+
+ if (et->defined)
+ {
+ int wakeup = (int) et->last + et->n - local_now;
+ if (wakeup <= 0)
+ {
+#if INTERVAL_DEBUG
+ dmsg (D_INTERVAL, "EVENT event_timeout_trigger (%d) etcr=%d", et->n, et_const_retry);
+#endif
+ if (et_const_retry < 0)
+ {
+ et->last = local_now;
+ wakeup = et->n;
+ ret = true;
+ }
+ else
+ {
+ wakeup = et_const_retry;
+ }
+ }
+
+ if (tv && wakeup < tv->tv_sec)
+ {
+#if INTERVAL_DEBUG
+ dmsg (D_INTERVAL, "EVENT event_timeout_wakeup (%d/%d) etcr=%d", wakeup, et->n, et_const_retry);
+#endif
+ tv->tv_sec = wakeup;
+ tv->tv_usec = 0;
+ }
+ }
+ return ret;
+}