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https://bro-tracker.atlassian.net/browse/BIT-1407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=20903#comment-20903
 ] 

Vern Paxson commented on BIT-1407:
----------------------------------

While there's an appeal to processing arguments in script-land, because some 
arguments control basic script processing (e.g., -p), I'm not sure this can be 
done in a coherent fashion without some significant under-the-hood kludges.

Regarding replacing -f with PacketFilter::filter=XXXX, yuck - I wouldn't want 
to have to remember that, and there's no ready way for a user to discover this.

I'd be happy settling for -f warning (or exiting) with a statement that without 
the packet filtering framework loaded, it's a no-op.  Though I have a forboding 
that you're going to tell me that that's actually hard to implement :-P.


> -f silently fails if base/frameworks/packet-filter isn't loaded
> ---------------------------------------------------------------
>
>                 Key: BIT-1407
>                 URL: https://bro-tracker.atlassian.net/browse/BIT-1407
>             Project: Bro Issue Tracker
>          Issue Type: Problem
>          Components: Bro
>            Reporter: Vern Paxson
>         Attachments: signature.asc
>
>
> I know we've been through this before (though searching the tickets in Jira, 
> I couldn't find the thread).  But to revisit: the "-f filter" option silently 
> does nothing if base/frameworks/packet-filter isn't loaded (so the scenario 
> here is using -b to suppress its automatic loading).  This can lead to 
> seriously confusing behavior.  It would be preferable if there's either an 
> error message indicating that the option won't be supported, or if it forced 
> loading of packet-filter.



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