Merge commit '86cc97e55fe346502462284d2e636a2b3708163e' as 'Sources/OpenVPN3'

2026-04-24 00:00:05 +08:00 · 2020-02-24 14:43:11 +03:00
parent 133b3756e6 86cc97e55f
commit 32f1555929
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+//    OpenVPN -- An application to securely tunnel IP networks
+//               over a single port, with support for SSL/TLS-based
+//               session authentication and key exchange,
+//               packet encryption, packet authentication, and
+//               packet compression.
+//
+//    Copyright (C) 2012-2017 OpenVPN Inc.
+//
+//    This program is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Affero General Public License Version 3
+//    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 Affero General Public License for more details.
+//
+//    You should have received a copy of the GNU Affero General Public License
+//    along with this program in the COPYING file.
+//    If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef OPENVPN_TIME_COARSETIME_H
+#define OPENVPN_TIME_COARSETIME_H
+
+#include <openvpn/time/time.hpp>
+
+namespace openvpn {
+
+  // Used to compare two time objects within the accuracy limits
+  // defined by pre and post.
+
+  class CoarseTime
+  {
+  public:
+    CoarseTime() {}
+
+    CoarseTime(const Time::Duration& pre, const Time::Duration& post)
+      : pre_(pre), post_(post) {}
+
+    void init(const Time::Duration& pre, const Time::Duration& post)
+    {
+      pre_ = pre;
+      post_ = post;
+    }
+
+    void reset(const Time& t) { time_ = t; }
+    void reset() { time_.reset(); }
+
+    bool similar(const Time& t) const
+    {
+      if (time_.defined())
+	{
+	  if (t >= time_)
+	    return (t - time_) <= post_;
+	  else
+	    return (time_ - t) <= pre_;
+	}
+      else
+	return false;
+    }
+
+  private:
+    Time time_;
+    Time::Duration pre_;
+    Time::Duration post_;
+  };
+
+} // namespace openvpn
+
+#endif // OPENVPN_TIME_COARSETIME_H