--- a/src/node/ipv4.h	Mon Feb 12 13:06:05 2007 +0100
+++ b/src/node/ipv4.h	Mon Feb 12 15:55:49 2007 +0100
@@ -85,6 +85,7 @@
   uint32_t AddInterface (Ipv4Interface *interface);
   Ipv4Interface * GetInterface (uint32_t i);
   uint32_t GetNInterfaces (void) const;
+  Ipv4Interface *FindInterfaceForDevice (NetDevice const*device);
   
 
   Ipv4* Copy(Node *node) const;