[Emu] draft-aura-eap-noob-08 NAI

[Max Crone <[e-mail]>]

While implementing EAP-NOOB, I found the explanation on the Invalid NAI 
(error code 1001) in the draft to be unclear.

The document formulates it as follows:
 >   If the NAI structure is invalid, the server SHOULD send the error
 >   code 1001 to the peer.

However, does this mean that the EAP-NOOB server should verify that the 
NAI follows the formal syntax as specified in RFC 7542, or should it 
verify that the NAI follows the specification of EAP-NOOB, i.e., it is 
of the form "noob@{eap-noob.net||RESERVED_DOMAIN}". I think this section 
could be formulated more clearly to address these concerns.

On that note, Figure 2 seems to be incomplete. The EAP-Response/Identity 
specifies the NAI parameter to be "[e-mail]", while the 
specification also has the option of configuring this to a reserved 
domain. In that case, the NAI should not use the default realm anymore. 
Currently, this is not reflected in the figure.

If anything remains unclear, I am open for discussion.

~Max Crone