Add access to the network interfaces

kernel/include/network.hpp

@@ -26,6 +26,8 @@ void init();
 
 size_t number_of_interfaces();
 
+interface_descriptor& interface(size_t index);
+
 } // end of network namespace
 
 #endif

kernel/src/network.cpp

@@ -61,3 +61,7 @@ void network::init(){
 size_t network::number_of_interfaces(){
     return interfaces.size();
 }
+
+interface_descriptor& network::interface(size_t index){
+    return interfaces[index];
+}