model: PacketHeader<T> and interface with NS-3
This commit creates a compatible interface to convert ndn-cxx Interest
and Data structures into NS-3's Ptr<Packet> and back.
Refs: #2048, #2230
diff --git a/model/ndn-header.cpp b/model/ndn-header.cpp
new file mode 100644
index 0000000..89c9251
--- /dev/null
+++ b/model/ndn-header.cpp
@@ -0,0 +1,158 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2011-2014 Regents of the University of California.
+ *
+ * This file is part of ndnSIM. See AUTHORS for complete list of ndnSIM authors and
+ * contributors.
+ *
+ * ndnSIM is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * ndnSIM 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
+ * ndnSIM, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+#include "ndn-header.hpp"
+
+#include <iosfwd>
+#include <boost/iostreams/concepts.hpp>
+#include <boost/iostreams/stream.hpp>
+
+namespace io = boost::iostreams;
+
+namespace ns3 {
+namespace ndn {
+
+template<>
+ns3::TypeId
+PacketHeader<Interest>::GetTypeId()
+{
+ static ns3::TypeId tid =
+ ns3::TypeId("ns3::ndn::Interest")
+ .SetGroupName("Ndn")
+ .SetParent<Header>()
+ .AddConstructor<PacketHeader<Interest>>()
+ ;
+
+ return tid;
+}
+
+template<>
+ns3::TypeId
+PacketHeader<Data>::GetTypeId()
+{
+ static ns3::TypeId tid =
+ ns3::TypeId("ns3::ndn::Data")
+ .SetGroupName("Ndn")
+ .SetParent<Header>()
+ .AddConstructor<PacketHeader<Data>>()
+ ;
+ return tid;
+}
+
+template<class Pkt>
+TypeId
+PacketHeader<Pkt>::GetInstanceTypeId(void) const
+{
+ return GetTypeId();
+}
+
+template<class Pkt>
+PacketHeader<Pkt>::PacketHeader()
+{
+}
+
+template<class Pkt>
+PacketHeader<Pkt>::PacketHeader(const Pkt& packet)
+ : m_packet(packet.shared_from_this())
+{
+}
+
+template<class Pkt>
+uint32_t
+PacketHeader<Pkt>::GetSerializedSize(void) const
+{
+ return m_packet->wireEncode().size();
+}
+
+template<class Pkt>
+void
+PacketHeader<Pkt>::Serialize(Buffer::Iterator start) const
+{
+ start.Write(m_packet->wireEncode().wire(), m_packet->wireEncode().size());
+}
+
+class Ns3BufferIteratorSource : public io::source {
+public:
+ Ns3BufferIteratorSource(Buffer::Iterator& is)
+ : m_is(is)
+ {
+ }
+
+ std::streamsize
+ read(char* buf, std::streamsize nMaxRead)
+ {
+ std::streamsize i = 0;
+ for (; i < nMaxRead && !m_is.IsEnd(); ++i) {
+ buf[i] = m_is.ReadU8();
+ }
+ if (i == 0) {
+ return -1;
+ }
+ else {
+ return i;
+ }
+ }
+
+private:
+ Buffer::Iterator& m_is;
+};
+
+template<class Pkt>
+uint32_t
+PacketHeader<Pkt>::Deserialize(Buffer::Iterator start)
+{
+ auto packet = make_shared<Pkt>();
+ io::stream<Ns3BufferIteratorSource> is(start);
+ packet->wireDecode(::ndn::Block::fromStream(is));
+ m_packet = packet;
+ return packet->wireEncode().size();
+}
+
+template<>
+void
+PacketHeader<Interest>::Print(std::ostream& os) const
+{
+ os << "I: " << *m_packet;
+}
+
+template<>
+void
+PacketHeader<Data>::Print(std::ostream& os) const
+{
+ os << "D: " << *m_packet;
+}
+
+template<class Pkt>
+shared_ptr<const Pkt>
+PacketHeader<Pkt>::getPacket()
+{
+ return m_packet;
+}
+
+typedef PacketHeader<Interest> InterestHeader;
+typedef PacketHeader<Data> DataHeader;
+
+NS_OBJECT_ENSURE_REGISTERED(InterestHeader);
+NS_OBJECT_ENSURE_REGISTERED(DataHeader);
+
+template class PacketHeader<Interest>;
+template class PacketHeader<Data>;
+
+} // namespace ndn
+} // namespace ns3