wifi: Allow QosTxop to return its Access Category

src/wifi/model/qos-txop.cc

@@ -788,4 +788,10 @@ QosTxop::IsQosTxop (void) const
   return true;
 }
 
+AcIndex
+QosTxop::GetAccessCategory (void) const
+{
+  return m_ac;
+}
+
 } //namespace ns3

src/wifi/model/qos-txop.h

@@ -84,6 +84,7 @@ public:
   virtual ~QosTxop ();
 
   bool IsQosTxop (void) const override;
+  AcIndex GetAccessCategory (void) const override;
   void SetWifiRemoteStationManager (const Ptr<WifiRemoteStationManager> remoteManager) override;
   bool HasFramesToTransmit (void) override;
   void NotifyInternalCollision (void) override;

src/wifi/model/txop.cc

@@ -423,4 +423,10 @@ Txop::IsQosTxop () const
   return false;
 }
 
+AcIndex
+Txop::GetAccessCategory (void) const
+{
+  return AC_BE_NQOS;
+}
+
 } //namespace ns3

src/wifi/model/txop.h

@@ -36,6 +36,7 @@ class UniformRandomVariable;
 class CtrlBAckResponseHeader;
 class WifiRemoteStationManager;
 enum WifiMacDropReason : uint8_t;  // opaque enum declaration
+enum AcIndex : uint8_t;
 
 /**
  * \brief Handle packet fragmentation and retransmissions
@@ -97,6 +98,12 @@ public:
    * \returns true if QoS TXOP.
    */
   virtual bool IsQosTxop () const;
+  /**
+   * Get the access category.
+   *
+   * \return the access category.
+   */
+  virtual AcIndex GetAccessCategory (void) const;
 
   /**
    * Set ChannelAccessManager this Txop is associated to.