btw, KAME have removed VRRP6 implementation from the distribution
because of the IPR statement (it conflicts with our policy about
IPR). there's ongoing work called "carp" which is specifically
designed to avoid infringing cisco patent on HSRP by avoiding core
details, so KAME would integrate that eventually.
itojun
--- KAME IPR policy
9. Policy on technology with intellectual property right restriction
There are quite a few IETF documents/whatever which has intellectual property
right (IPR) restriction. KAME's stance is stated below.
The goal of KAME is to provide freely redistributable, BSD-licensed,
implementation of Internet protocol technologies.
For this purpose, we implement protocols that (1) do not need license
contract with IPR holder, and (2) are royality-free.
The reason for (1) is, even if KAME contracts with the IPR holder in
question, the users of KAME stack (usually implementers of some other
codebase) would need to make a license contract with the IPR holder.
it would damage "freely redistributable" status of KAME codebase.
By doing so KAME is (implicitly) trying to advocate no-license-contract,
royality-free, release of IPRs.
Note however, as documented in README, we do not guarantee that KAME code
is free of IPR infringement, you MUST check it if you are to integrate
KAME into your product (or whatever):
READ CAREFULLY: Several countries have legal enforcement for
export/import/use of cryptographic software. Check it before playing
with the kit. We do not intend to be your legalease clearing house
(NO WARRANTY). If you intend to include KAME stack into your product,
you'll need to check if the licenses on each file fit your situations,
and/or possible intellectual property right issues.