fixed valgrind errors of epc-s1u tests

src/lte/helper/epc-helper.cc

@@ -64,16 +64,16 @@ EpcHelper::EpcHelper ()
   NS_ASSERT (retval == 0);
 
   // create TUN device implementing tunneling of user data over GTP-U/UDP/IP 
-  Ptr<VirtualNetDevice> tunDevice = CreateObject<VirtualNetDevice> ();
+  m_tunDevice = CreateObject<VirtualNetDevice> ();
   // allow jumbo packets
-  tunDevice->SetAttribute ("Mtu", UintegerValue (30000));
+  m_tunDevice->SetAttribute ("Mtu", UintegerValue (30000));
 
   // yes we need this
-  tunDevice->SetAddress (Mac48Address::Allocate ()); 
+  m_tunDevice->SetAddress (Mac48Address::Allocate ()); 
 
-  m_sgwPgw->AddDevice (tunDevice);
+  m_sgwPgw->AddDevice (m_tunDevice);
   NetDeviceContainer tunDeviceContainer;
-  tunDeviceContainer.Add (tunDevice);
+  tunDeviceContainer.Add (m_tunDevice);
   
   // the TUN device is on the same subnet as the UEs, so when a packet
   // addressed to an UE arrives at the intenet to the WAN interface of
@@ -81,11 +81,11 @@ EpcHelper::EpcHelper ()
   Ipv4InterfaceContainer tunDeviceIpv4IfContainer = m_ueAddressHelper.Assign (tunDeviceContainer);  
 
   // create EpcSgwPgwApplication
-  m_sgwPgwApp = CreateObject<EpcSgwPgwApplication> (tunDevice, sgwPgwS1uSocket);
+  m_sgwPgwApp = CreateObject<EpcSgwPgwApplication> (m_tunDevice, sgwPgwS1uSocket);
   m_sgwPgw->AddApplication (m_sgwPgwApp);
   
   // connect SgwPgwApplication and virtual net device for tunneling
-  tunDevice->SetSendCallback (MakeCallback (&EpcSgwPgwApplication::RecvFromTunDevice, m_sgwPgwApp));
+  m_tunDevice->SetSendCallback (MakeCallback (&EpcSgwPgwApplication::RecvFromTunDevice, m_sgwPgwApp));
 
 }
 
@@ -119,6 +119,15 @@ EpcHelper::GetTypeId (void)
   return tid;
 }
 
+void
+EpcHelper::DoDispose ()
+{
+  m_tunDevice->SetSendCallback (MakeNullCallback<bool, Ptr<Packet>, const Address&, const Address&, uint16_t> ());
+  m_tunDevice = 0;
+  m_sgwPgwApp = 0;  
+  m_sgwPgw->Dispose ();
+}
+
 
 void
 EpcHelper::AddEnb (Ptr<Node> enb, Ptr<NetDevice> lteEnbNetDevice)

src/lte/helper/epc-helper.h

@@ -32,6 +32,7 @@ namespace ns3 {
 
 class Node;
 class NetDevice;
+class VirtualNetDevice;
 class EpcSgwPgwApplication;
 
 /**
@@ -58,6 +59,7 @@ public:
   
   // inherited from Object
   static TypeId GetTypeId (void);
+  virtual void DoDispose ();
 
   
   /** 
@@ -126,8 +128,8 @@ private:
   Ipv4AddressHelper m_ueAddressHelper; 
   
   Ptr<Node> m_sgwPgw; 
-
   Ptr<EpcSgwPgwApplication> m_sgwPgwApp;
+  Ptr<VirtualNetDevice> m_tunDevice;
 
   DataRate m_s1uLinkDataRate;
   Time     m_s1uLinkDelay;

src/lte/model/epc-sgw-pgw-application.cc

@@ -85,6 +85,13 @@ EpcSgwPgwApplication::GetTypeId (void)
   return tid;
 }
 
+void
+EpcSgwPgwApplication::DoDispose ()
+{
+  m_s1uSocket->SetRecvCallback (MakeNullCallback<void, Ptr<Socket> > ());
+  m_s1uSocket = 0;
+}
+
   
 
 EpcSgwPgwApplication::EpcSgwPgwApplication (const Ptr<VirtualNetDevice> tunDevice, const Ptr<Socket> s1uSocket)

src/lte/model/epc-sgw-pgw-application.h

@@ -51,6 +51,7 @@ public:
 
   // inherited from Object
   static TypeId GetTypeId (void);
+  virtual void DoDispose ();
 
   /**
    * Constructor that binds the tap device to the callback methods.