anchor.diff:  get_interfaces() ->
       case inet:getifaddrs() of
           {ok, IFs} ->
  -            [if_entry(I) || {_, Flags} <- IFs];
  +            [if_entry(I) || {_Name, _Flags} = I <- IFs];
           Error ->
               ?error("getifaddrs() -> ~p", [Error]),
               []
  
positive.code:                   undefined
            end,
      Interfaces = get_interfaces(),
      {ok, #st{ifs = Interfaces,
               poll_ref = Ref}}.
  
  
negative.code: 
  adjust_status(IF, operstate, A, B) ->
      {adjust_operstate(A, IF), adjust_operstate(B, IF)};
  adjust_status(_, _, A, B) ->
      {A, B}.
  
  adjust_operstate(undefined,  _) -> down;
  