add missing implementations

src/devices/wifi/propagation-loss-model.cc

@@ -97,7 +97,8 @@ FriisPropagationLossModel::GetTypeId (void)
     .AddAttribute ("MinDistance", 
                    "The distance under which the propagation model refuses to give results (m)",
                    DoubleValue (0.5),
-                   MakeDoubleAccessor (&FriisPropagationLossModel::m_minDistance),
+                   MakeDoubleAccessor (&FriisPropagationLossModel::SetMinDistance,
+                                       &FriisPropagationLossModel::GetMinDistance),
                    MakeDoubleChecker<double> ())
     ;
   return tid;
@@ -116,6 +117,16 @@ FriisPropagationLossModel::GetSystemLoss (void) const
   return m_systemLoss;
 }
 void 
+FriisPropagationLossModel::SetMinDistance (double minDistance)
+{
+  m_minDistance = minDistance;
+}
+double 
+FriisPropagationLossModel::GetMinDistance (void) const
+{
+  return m_minDistance;
+}
+void 
 FriisPropagationLossModel::SetLambda (double frequency, double speed)
 {
   m_lambda = speed / frequency;

src/devices/wifi/propagation-loss-model.h

@@ -133,6 +133,11 @@ public:
    */
   void SetMinDistance (double minDistance);
 
+  /**
+   * \returns the minimum distance.
+   */
+  double GetMinDistance (void) const;
+
   /**
    * \returns the current wavelength (m)
    */