src/dest wilcard matching

[Zachary Link]

I am looking for the ability to use wilcards or regexp type matching for
source and destination fields.  Maybe this could be an extension or
something...

For example
--source 172.*.*.1
or
--destination 10.[1-10].[10|20].1

Picture, if you will, a situation where you had 1,000 offices all on
10.x.y.0/24 networks.  All routers might be 10.x.y.1.  You might want to
give your network guys access to just those devices, and sysadmins access
to all servers at 10.x.y.10-19 or any other types of devices sitting on
these networks.

So, the biggest hurdle I need to overcome is to allow arbitrary middle
octets while matching 1st and last octet.  I was looking through the docs
and I found that something like this could be done with the u32 extensions
(I think), but it would be very cumbersome, and not easy to use.  I also
took a look at the code and realized there is no way to do it myself as I
have no real knowledge of C (I'll look like an idiot here if that's not C 
;-).

So, am I missing some existing functionality that would allow for that? 
Or, does anyone have any desire to develop that sort of feature?

Thanks all,

Zack