[Zeek] pkg add-interfaces

[Jan Grashöfer]

Hi Scot,

unfortunately I cannot reproduce the issue.

> Looking at the code for the function interface_ext_func looks like the 
> condition is most likely failing and there is no return value specified.
> 
> function interface_ext_func(path: string): AddedFields
> 
>          {
> 
>          if ( Cluster::nodes[Cluster::node]?$interface )
> 
>                  return AddedFields($interface = 
> Cluster::nodes[Cluster::node]$interface);
> 
>          }

You might try to add something like the following to deal with timing 
issues:

else
   return AddedFields($interface = fmt("%s:unknown-interface", 
Cluster::node));

However, if the interfaces do not appear in the logs after an initial 
warm-up, there might be something else wrong.

Jan