Adding UniformVariable::GetInteger and using it to fix bug in RealRandomStream::GetNext.

src/core/random-variable.cc

@@ -274,6 +274,11 @@ double UniformVariable::GetValue(double s, double l)
   return ((UniformVariableImpl*)Peek())->GetValue(s,l);
 }
 
+uint32_t UniformVariable::GetInteger (uint32_t s, uint32_t l)
+{
+  NS_ASSERT(s <= l);
+  return static_cast<uint32_t>( GetValue(s, l+1) );
+}
 
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------

src/core/random-variable.h

@@ -200,6 +200,13 @@ public:
   */
   double GetValue(double s, double l);
 
+  /**
+   * \brief Returns a random unsigned integer from the interval [s,l] including both ends.
+   * \param s Low end of the range
+   * \param l High end of the range
+   * \return A random unsigned integer value.
+   */
+  uint32_t GetInteger (uint32_t s, uint32_t l);
 };
 
 /**

src/devices/wifi/random-stream.cc

@@ -34,7 +34,7 @@ RealRandomStream::RealRandomStream ()
 uint32_t 
 RealRandomStream::GetNext (uint32_t min, uint32_t max)
 {
-  return static_cast<uint32_t> (round (m_stream.GetValue (min, max)));
+  return m_stream.GetInteger (min, max);
 }