rewriting usernames

[Christopher Carver]

Hello,

How do I rewrite the value of the User-Name attribute based on
Called-Station-Id?  I need to do a series of these logical decisions and
replace the username with username@<some-isp.com> based on what the value of
Called-Station-Id is.

rlm_attr_rewrite seems the obvious choice, but I can't figure out how to use
various instances of that module only when Called-Station-Id has a certain
value.

It seems like a strange thing to need to do, but I've thought about our problem
and this is really the only scalable way.  I can give a lot of background as to
why, but I figured I would ask the question first.  So, does anyone have any
ideas?

Also, thank you for all the hard work on Freeradius.  Its a great piece of
software.

Thanks

Chris Carver