On Thu, 2011-06-16 at 16:51 +0200, Frederic Bor wrote:

Hello,

I’m currently implementing transparent proxying for tor with Layered Service Provider feature on windows. Microsoft provides a sample to demonstrate how to implement an empty LSP (this is a lot of work, even to do nothing). This sample is distributed under the license attached in this email. I have been advised on #tor-dev to ask here about its compatibility with 3-clause BSD.

It seems compatible to me but the following restriction may be a problem in an open source context:

"You may not [...] modify or distribute the source code of any Distributable Code so that any part of it becomes subject to an Excluded License. An Excluded License is one that requires, as a condition of use, modification or distribution, that:

• the code be disclosed or distributed in source code form, or
• others have the right to modify it."

The wording "requires, as a condition of use, modification or distribution" seems to allow to use the sample in tor, since there is no such requirement in 3-clause BSD.

Does this seem right to you?

You might want to ask licensing@fsf.org -- that looks like a clause designed to exclude copyleft licenses, so they'd probably know about it and what effects it would have on non-copyleft licenses.