--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/wifi/model/ht-capabilities.h	Tue Aug 13 22:05:25 2013 -0700
@@ -0,0 +1,123 @@
+/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2013
+ *
+ * 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: Ghada Badawy <gbadawy@gmail.com>
+ */
+#ifndef HT_CAPABILITIES_H
+#define HT_CAPABILITIES_H
+
+#include <stdint.h>
+#include "ns3/buffer.h"
+#include "ns3/attribute-helper.h"
+#include "ns3/wifi-information-element.h"
+
+/**
+ * This defines the maximum number of supported MCSs that a STA is
+ * allowed to have. Currently this number is set for IEEE 802.11n
+ */
+#define MAX_SUPPORTED_MCS  (77)
+
+namespace ns3 {
+
+/**
+ * \brief The Ht Capabilities Information Element
+ * \ingroup wifi
+ *
+ * This class knows how to serialise and deserialise the Ht Capabilities Information Element
+ */
+class HtCapabilities: public WifiInformationElement
+{
+public:
+   HtCapabilities ();
+  void SetLdpc (uint8_t ldpc);
+  void SetSupportedChannelWidth (uint8_t supportedchannelwidth);
+  void SetGreenfield (uint8_t greenfield);
+  void SetShortGuardInterval20(uint8_t shortguardinterval);
+  void SetHtCapabilitiesInfo(uint16_t ctrl);
+  void SetAmpduParameters (uint8_t ctrl);
+  void SetSupportedMcsSet (uint64_t ctrl1, uint64_t ctrl2);
+  void SetHtSupported(uint8_t htsupported);
+  void SetRxMcsBitmask(uint8_t index);
+  bool IsSupportedMcs (uint8_t mcs);
+  //returns the HT Capabilties info field in the HT Capabilities information element
+  uint16_t GetHtCapabilitiesInfo (void) const;
+  //returns the Ampdu parameters field in the HT Capabilities information element
+  uint8_t GetAmpduParameters (void) const;
+  //returns the first 64bytes of the Supported MCS field in the HT Capabilities information element
+  uint64_t GetSupportedMcsSet1 (void) const;
+  //returns the first 64bytes of the Supported MCS field in the HT Capabilities information element
+  uint64_t GetSupportedMcsSet2 (void) const;
+  uint8_t GetLdpc (void) const;
+  uint8_t GetGreenfield (void) const;
+  uint8_t GetShortGuardInterval20 (void) const;
+  uint8_t GetSupportedChannelWidth (void) const; //2040 supported or not
+  uint8_t ConvertToUint8 () const;
+  uint8_t* GetRxMcsBitmask();
+  
+  WifiInformationElementId ElementId () const;
+  uint8_t GetInformationFieldSize () const;
+  void SerializeInformationField (Buffer::Iterator start) const;
+  uint8_t DeserializeInformationField (Buffer::Iterator start,
+                                       uint8_t length);
+ /*
+   * This information element is a bit special in that it is only
+   * included if the STA is an HT STA. To support this we
+   * override the Serialize and GetSerializedSize methods of
+   * WifiInformationElement.
+   */
+  Buffer::Iterator Serialize (Buffer::Iterator start) const;
+  uint16_t GetSerializedSize () const;
+ 
+private:
+  uint8_t m_ldpc;
+  uint8_t m_supportedChannelWidth;
+  uint8_t m_smPowerSave;
+  uint8_t m_greenField;
+  uint8_t m_shortGuardInterval20; 
+  uint8_t m_shortGuardInterval40;
+  uint8_t m_txStbc;
+  uint8_t m_rxStbc;
+  uint8_t m_htDelayedBlockAck;
+  uint8_t m_maxAmsduLength;
+  uint8_t m_dssMode40;
+  uint8_t m_reserved;
+  uint8_t m_fortyMhzIntolerant;
+  uint8_t m_lsigProtectionSupport;
+  uint8_t m_maxAmpduLength;
+  uint8_t m_minMpduStartSpace;
+  uint8_t m_ampduReserved;
+  uint8_t m_reservedMcsSet1;
+  uint16_t m_rxHighestSupportedDataRate;
+  uint8_t m_reservedMcsSet2;
+  uint8_t m_txMcsSetDefined;
+  uint8_t m_txRxMcsSetUnequal;
+  uint8_t m_txMaxNSpatialStreams;
+  uint8_t m_txUnequalModulation;
+  uint32_t m_reservedMcsSet3; 
+  uint8_t m_rxMcsBitmask[MAX_SUPPORTED_MCS];
+  //this is used to decide if this element should be added to the frame or not
+  uint8_t m_htSupported;
+};
+
+std::ostream &operator << (std::ostream &os, const HtCapabilities &htcapabilities);
+std::istream &operator >> (std::istream &is, HtCapabilities &htcapabilities);
+
+ATTRIBUTE_HELPER_HEADER (HtCapabilities)
+
+} // namespace ns3
+
+#endif /* HT_CAPABILITY_H */