[PATCH RFC 0/2] Adding HMAC support to the Babel protocol

[Toke Høiland-Jørgensen]

The Babel IETF working group is in the process of specifying an extension to the
Babel protocol that adds HMAC authentication of messages. The current draft
proposal is available as draft-do-babel-hmac-00:

https://tools.ietf.org/html/draft-do-babel-hmac-00

This patch adds an implementation of this draft to Babel in Bird. The draft is
a way from being finalised, so it is premature to merge the code. Instead, this
should be seen as a call for feedback on both the implementation and the draft
specification.

The proof of concept implementation of HMAC for babeld is available in the
hmac-challenge branch of this repository: https://github.com/wkolod/babeld

With this patch, Bird can successfully exchange HMAC-authenticated messages with
babeld in the above repo.

-Toke

---

Toke Høiland-Jørgensen (2):
      babel: Define helper macro for looping through TLVs
      babel: Add HMAC support


 proto/babel/babel.c   |   80 +++++++++
 proto/babel/babel.h   |   58 ++++++
 proto/babel/config.Y  |   34 ++++
 proto/babel/packets.c |  439 +++++++++++++++++++++++++++++++++++++++++++++----
 4 files changed, 567 insertions(+), 44 deletions(-)