[Bug 653] NetDevice link change callback (SetLinkChangeCallback -> AddLinkChangeCallback).

src/node/net-device.h

@@ -128,12 +128,12 @@ public:
   /**
    * \param callback the callback to invoke
    *
-   * Register a callback invoked whenever the link 
+   * Add a callback invoked whenever the link 
    * status changes to UP. This callback is typically used
-   * by the IP/ARP layer to flush the ARP cache 
-   * whenever the link goes up.
+   * by the IP/ARP layer to flush the ARP cache and by IPv6 stack
+   * to flush NDISC cache whenever the link goes up.
    */
-  virtual void SetLinkChangeCallback (Callback<void> callback) = 0;
+  virtual void AddLinkChangeCallback (Callback<void> callback) = 0;
   /**
    * \return true if this interface supports a broadcast address,
    *         false otherwise.

src/node/simple-net-device.cc

@@ -121,7 +121,7 @@ SimpleNetDevice::IsLinkUp (void) const
   return true;
 }
 void 
-SimpleNetDevice::SetLinkChangeCallback (Callback<void> callback)
+SimpleNetDevice::AddLinkChangeCallback (Callback<void> callback)
 {}
 bool 
 SimpleNetDevice::IsBroadcast (void) const

src/node/simple-net-device.h

@@ -53,7 +53,7 @@ public:
   virtual bool SetMtu (const uint16_t mtu);
   virtual uint16_t GetMtu (void) const;
   virtual bool IsLinkUp (void) const;
-  virtual void SetLinkChangeCallback (Callback<void> callback);
+  virtual void AddLinkChangeCallback (Callback<void> callback);
   virtual bool IsBroadcast (void) const;
   virtual Address GetBroadcast (void) const;
   virtual bool IsMulticast (void) const;