[Babel-users] Source-sensitive packet's format

[Matthieu Boutier]

> If the Flags field contains any flags, then the resulting parser state
> will be different for original and source-specific implementations.  This
> will break interoperability.

Yes, there is a problem with the compression mechanism for the destination
prefix.  The solutions are:

  - no compression,

  - consider that updates will not know the extension: either

    - announce all ss-updates at the end of the message, or

    - systematically resend the destination prefix when it has been updated
      by an ss-update,

  - define another destination compressed prefix.

Currently, the solution 2 is implemented, but ss-updates are not regrouped
at the end of the message.

> Rather than setting up complex rules to avoid the issue, I suggest we dump
> the Flags field from SS-Updates.  We can either remove the field, or mark
> it as reserved.  I suggest we remove it and be done with that.

While choosing an extremist solution, I would prefer the third one.

Matthieu