Re: [AVTCORE] RFC5285bis open issues

[Magnus Westerlund <[e-mail]>]

Den 2017-02-26 kl. 08:30, skrev Roni Even:
> Hi Magnus,
> Thanks,
> I will add the text about the id=0 len>0 using option b
>

Regarding this text:

    Each distinct extension MUST have a unique ID.
    The value 0 is reserved for padding and MUST NOT be used as a local
    identifier.

    an extension element with a value equal 0 MUST NOT have len greater
    than 0.  If such an extension element is encountered, its length
    field MUST be ignored, processing of the entire extension MUST
    terminate at that point, and only the extension elements present
    prior to the element with ID 0 and len greater than 0 SHOULD be
    considered.

I think it could be improved to make it clearer, thus I suggest the 
following changed:

    Each distinct extension MUST have a unique ID.
    The ID value 0 is reserved for padding and MUST NOT be used as a
        ^^
    local identifier.

    An extension element with an ID value equal 0 MUST NOT have len
    ^                          ^^^^
    greater
    than 0.  If such an extension element is encountered, its length
    field MUST be ignored, processing of the entire extension MUST
    terminate at that point, and only the extension elements present
    prior to the element with ID 0 and len greater than 0 SHOULD be
    considered.



> As for support for one-byte only I think that since section 4.1.2 says " the one-byte header form is preferred and MUST be supported by
>    all receivers" it provides guideline to use one-byte saying that one-byte will work but two-bytes may not. Do you have another proposed text to address this point?

No, I don't have any suggestion for improving that text.

Cheers

Magnus Westerlund

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