Index: src/low-resolution-radio/model/lrr-routing-dpd.h |
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+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
+/* |
+ * Copyright (c) 2010 Telum (www.telum.ru) |
+ * |
+ * 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; if not, write to the Free Software |
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
+ * |
+ * Authors: Pavel Boyko <boyko@telum.ru> |
+ */ |
+ |
+#ifndef LRR_DUPLICATEPACKETDETECTION_H_ |
+#define LRR_DUPLICATEPACKETDETECTION_H_ |
+ |
+#include "ns3/lrr-routing-seq-cache.h" |
+#include "ns3/nstime.h" |
+#include "ns3/packet.h" |
+#include "ns3/ipv4-header.h" |
+ |
+namespace ns3 |
+{ |
+namespace lrr |
+{ |
+/** |
+ * \ingroup lrr |
+ * |
+ * \brief Helper class used to remember already seen packets and detect duplicates. |
+ * |
+ * Duplicate detection is based on uinique packet ID given by sequence tag added |
+ */ |
+class DuplicatePacketDetection |
+{ |
+public: |
+ /// C-tor |
+ DuplicatePacketDetection (Time lifetime) : m_seqnoCache (lifetime) {} |
+ /// Check that the packet is duplicated. If not, save information about this packet. |
+ bool IsDuplicate (Ptr<const Packet> p, const Ipv4Header & header); |
+ /// Set duplicate records lifetimes |
+ void SetLifetime (Time lifetime); |
+ /// Get duplicate records lifetimes |
+ Time GetLifetime () const; |
+ /// Add sequence tag: |
+ void PrepareTx (Ptr<Packet> p); |
+private: |
+ class SeqTag : public Tag |
+ { |
+public: |
+ /// Sequence number |
+ uint32_t seqno; |
+ |
+ SeqTag (uint32_t s = 0) : |
+ Tag (), seqno (s) |
+ {} |
+ |
+ ///\name Inherited from Tag |
+ ///\{ |
+ static TypeId GetTypeId (); |
+ TypeId GetInstanceTypeId () const; |
+ uint32_t GetSerializedSize () const; |
+ void Serialize (TagBuffer i) const; |
+ void Deserialize (TagBuffer i); |
+ void Print (std::ostream &os) const; |
+ ///\} |
+ }; |
+ /// Impl |
+ SeqCache m_seqnoCache; |
+}; |
+ |
+} // namespace lrr |
+} // namespace lrr |
+ |
+#endif |