The exact language of the restrictions from radiusd.c v1.16 is:
Permission to use, copy, modify, and distribute this software for any
purpose and without fee is hereby granted, provided that this
copyright and permission notice appear on all copies and supporting
documentation, the name of Livingston Enterprises, Inc. not be used
in advertising or publicity pertaining to distribution of the
program without specific prior permission, and notice be given
in supporting documentation that copying and distribution is by
permission of Livingston Enterprises, Inc.
Whether "without fee" indicates that the derived work may not be sold
or that Livingston relinquishes right to exact a royalty is sufficiently
ambiguous that I think a clear understanding without legal council is
impossible. My reading as a competent speaker of the English language
was the latter, but IANAL.
If the intent is to prohibit commercial sale of software derived from
the package, then language similar to that of the RSAREF license would
seem better. There is no ambiguity whatsoever that commercial use of
RSAREF is forbidden with very narrow exceptions. (See section 2.b of
the RSAREF license.)
-- Christopher Oliver Traverse Communications Systems Coordinator 223 Grandview Pkwy, Suite 108 oliver@traverse.com Traverse City, Michigan, 49684 Am I the last person to think that "leverage" is a noun and not a verb?