--- a/src/internet-node/ipv4.h	Thu May 10 18:33:52 2007 +0200
+++ b/src/internet-node/ipv4.h	Thu May 10 20:19:26 2007 +0200
@@ -165,7 +165,7 @@
    * to disable it, you can invoke Ipv4Interface::SetDown which will
    * make sure that it is never used during packet forwarding.
    */
-  uint32_t AddInterface (NetDevice *device);
+  uint32_t AddInterface (Ptr<NetDevice> device);
   /**
    * \param i index of interface to return
    * \returns the requested interface
@@ -182,7 +182,7 @@
    * Try to find an Ipv4Interface whose NetDevice is equal to
    * the input NetDevice.
    */
-  Ipv4Interface *FindInterfaceForDevice (NetDevice const*device);
+  Ipv4Interface *FindInterfaceForDevice (Ptr<const NetDevice> device);
   
 
   /**
@@ -192,7 +192,7 @@
    *    - implement a per-NetDevice ARP cache
    *    - send back arp replies on the right device
    */
-  virtual void Receive(Packet& p, NetDevice *device);
+  virtual void Receive(Packet& p, Ptr<NetDevice> device);
 
   /**
    * \param packet packet to send
@@ -220,7 +220,7 @@
   virtual void DoDispose (void);
 private:
   void SendRealOut (Packet const &packet, Ipv4Header const &ip, Ipv4Route const &route);
-  bool Forwarding (Packet const &packet, Ipv4Header &ipHeader, NetDevice *device);
+  bool Forwarding (Packet const &packet, Ipv4Header &ipHeader, Ptr<NetDevice> device);
   void ForwardUp (Packet p, Ipv4Header const&ip);
   uint32_t AddIpv4Interface (Ipv4Interface *interface);
   void SetupLoopback (void);