Add PDCP header: basic fields

src/lte/model/lte-pdcp-header.cc

@@ -0,0 +1,117 @@
+/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2011 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
+ *
+ * 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
+ *
+ * Author: Manuel Requena <manuel.requena@cttc.es>
+ */
+
+#include "ns3/log.h"
+
+#include "ns3/lte-pdcp-header.h"
+
+NS_LOG_COMPONENT_DEFINE ("LtePdcpHeader");
+
+namespace ns3 {
+
+NS_OBJECT_ENSURE_REGISTERED (LtePdcpHeader);
+
+LtePdcpHeader::LtePdcpHeader ()
+  : m_dcBit (0xff),
+    m_sequenceNumber (0xfffa)
+{
+}
+
+LtePdcpHeader::~LtePdcpHeader ()
+{
+  m_dcBit = 0xff;
+  m_sequenceNumber = 0xfffb;
+}
+
+void
+LtePdcpHeader::SetDcBit (uint8_t dcBit)
+{
+  m_dcBit = dcBit & 0x01;
+}
+
+void
+LtePdcpHeader::SetSequenceNumber (uint16_t sequenceNumber)
+{
+  m_sequenceNumber = sequenceNumber & 0x0FFF;
+}
+
+uint8_t
+LtePdcpHeader::GetDcBit () const
+{
+  return m_dcBit;
+}
+
+uint16_t
+LtePdcpHeader::GetSequenceNumber () const
+{
+  return m_sequenceNumber;
+}
+
+
+TypeId
+LtePdcpHeader::GetTypeId (void)
+{
+  static TypeId tid = TypeId ("ns3::LtePdcpHeader")
+    .SetParent<Header> ()
+    .AddConstructor<LtePdcpHeader> ()
+  ;
+  return tid;
+}
+
+TypeId
+LtePdcpHeader::GetInstanceTypeId (void) const
+{
+  return GetTypeId ();
+}
+
+void LtePdcpHeader::Print (std::ostream &os)  const
+{
+  os << "D/C=" << (uint16_t)m_dcBit;
+  os << " SN=" << m_sequenceNumber;
+}
+
+uint32_t LtePdcpHeader::GetSerializedSize (void) const
+{
+  return 2;
+}
+
+void LtePdcpHeader::Serialize (Buffer::Iterator start) const
+{
+  Buffer::Iterator i = start;
+
+  i.WriteU8 ( (m_dcBit << 7) | (m_sequenceNumber & 0x0F00) >> 8 );
+  i.WriteU8 ( (m_sequenceNumber & 0x00FF) );
+}
+
+uint32_t LtePdcpHeader::Deserialize (Buffer::Iterator start)
+{
+  Buffer::Iterator i = start;
+  uint8_t byte_1;
+  uint8_t byte_2;
+
+  byte_1 = i.ReadU8 ();
+  byte_2 = i.ReadU8 ();
+  m_dcBit = (byte_1 & 0x80) > 7;
+  m_sequenceNumber = ((byte_1 & 0x0F) << 8) | byte_2;
+
+  return GetSerializedSize ();
+}
+
+}; // namespace ns3

src/lte/model/lte-pdcp-header.h

@@ -0,0 +1,76 @@
+/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2011 Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)
+ *
+ * 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
+ *
+ * Author: Manuel Requena <manuel.requena@cttc.es>
+ */
+
+#ifndef LTE_PDCP_HEADER_H
+#define LTE_PDCP_HEADER_H
+
+#include "ns3/header.h"
+
+#include <list>
+
+namespace ns3 {
+
+/**
+ * \ingroup lte
+ * \brief The packet header for the Packet Data Convergence Protocol (PDCP) packets
+ *
+ * This class has fields corresponding to those in an PDCP header as well as
+ * methods for serialization to and deserialization from a byte buffer.
+ * It follows 3GPP TS 36.323 Packet Data Convergence Protocol (PDCP) specification.
+ */
+class LtePdcpHeader : public Header
+{
+public:
+
+  /**
+   * \brief Constructor
+   *
+   * Creates a null header
+   */
+  LtePdcpHeader ();
+  ~LtePdcpHeader ();
+
+  void SetDcBit (uint8_t dcBit);
+  void SetSequenceNumber (uint16_t sequenceNumber);
+
+  uint8_t GetDcBit () const;
+  uint16_t GetSequenceNumber () const;
+
+  typedef enum {
+    CONTROL_PDU   = 0,
+    DATA_PDU      = 1
+  } DcBit_t;
+
+  static TypeId GetTypeId (void);
+  virtual TypeId GetInstanceTypeId (void) const;
+  virtual void Print (std::ostream &os) const;
+  virtual uint32_t GetSerializedSize (void) const;
+  virtual void Serialize (Buffer::Iterator start) const;
+  virtual uint32_t Deserialize (Buffer::Iterator start);
+
+private:
+  uint8_t m_dcBit;
+  uint16_t m_sequenceNumber;
+
+};
+
+}; // namespace ns3
+
+#endif // LTE_PDCP_HEADER_H