--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/wifi/model/qos-tag.h	Fri Mar 04 01:26:54 2011 +0000
@@ -0,0 +1,108 @@
+/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2009 MIRKO BANCHI
+ *
+ * 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: Mirko Banchi <mk.banchi@gmail.com>
+ */
+#ifndef QOS_TAG_H
+#define QOS_TAG_H
+
+#include "ns3/packet.h"
+
+namespace ns3 {
+
+class Tag;
+
+
+/**
+ * As per IEEE Std. 802.11-2007, Section 6.1.1.1.1, when EDCA is used the
+ * the Traffic ID (TID) value corresponds to one of the User Priority (UP)
+ * values defined by the IEEE Std. 802.1D-2004, Annex G, table G-2.
+ *
+ * Note that this correspondence does not hold for HCCA, since in that
+ * case the mapping between UPs and TIDs should be determined by a
+ * TSPEC element as per IEEE Std. 802.11-2007, Section 7.3.2.30
+ */
+enum UserPriority {
+  UP_BK = 1, /**< background  */
+  UP_BE = 0, /**< best effort (default) */
+  UP_EE = 3, /**< excellent effort  */
+  UP_CL = 4, /**< controlled load */
+  UP_VI = 5, /**< video, < 100ms latency and jitter */
+  UP_VO = 6, /**< voice, < 10ms latency and jitter */
+  UP_NC = 7  /**< network control */
+};
+  
+
+  
+  /**
+   * The aim of the QosTag is to provide means for an Application to
+   * specify the TID which will be used by a QoS-aware WifiMac for a
+   * given traffic flow. Note that the current QosTag class was
+   * designed to be completely mac/wifi specific without any attempt
+   * at being generic. 
+   */
+class QosTag : public Tag
+{
+public:
+  static TypeId GetTypeId (void);
+  virtual TypeId GetInstanceTypeId (void) const;
+
+  /** 
+   * Create a QosTag with the default TID = 0 (best effort traffic) 
+   */  
+  QosTag ();
+
+  /** 
+   * Create a QosTag with the given TID 
+   */  
+  QosTag (uint8_t tid);
+
+  /** 
+   * Set the TID to the given value. This assumes that the
+   * application is aware of the QoS support provided by the MAC
+   * layer, and is therefore able to set the correct TID. 
+   * 
+   * @param tid the value of the TID to set
+   */
+  void SetTid (uint8_t tid);
+
+  /** 
+   * Set the TID to the value that corresponds to the requested
+   * UserPriority. Note that, since the mapping of UserPriority to TID
+   * is defined for EDCA only, you should call this method only when
+   * EDCA is used. When using HDCA, QosTag(uint8_t tid) should be used
+   * instead.
+   * 
+   * @param up the requested UserPriority
+   * 
+   */
+  void SetUserPriority (UserPriority up);
+
+  virtual void Serialize (TagBuffer i) const;
+  virtual void Deserialize (TagBuffer i);
+  virtual uint32_t GetSerializedSize () const;
+  virtual void Print (std::ostream &os) const;
+
+  uint8_t GetTid (void) const;
+
+private:
+  uint8_t m_tid;
+};
+
+} //namespace ns3
+
+#endif /* QOS_TAG_H */