Re: [MMUSIC] BUNDLE - MID Security

On Thu, Nov 3, 2016 at 6:52 AM, Magnus Westerlund <
magnus.westerlund@ericsson.com> wrote:

> Den 2016-11-02 kl. 21:07, skrev Adam Roach:
>
>> On 11/2/16 14:11, Cullen Jennings wrote:
>>
>>> I'd also like to give any reasonable advice we can on creating MIDs
>>> such that they meet that goal.  Is there any reason not to just make
>>> MID a 16 bit integer ? same for RID ?
>>>
>>
>>
>> draft-ietf-avtext-rid is in the RFC editors' queue. We *might* be able
>> to pull off minor editorial changes. As far as I understand things,
>> changing the format of a field would require us to pull it back and put
>> it through IETF LC and IESG review again.
>>
>> In terms of the actual proposed change ("16 bit integer"), SDES is
>> defined to be a UTF-8 string. Unless we want to define a whole other
>> thing instead of using SDES, these identifiers have to be valid UTF-8.
>>
>>
> I agree with Adam here that going to something that isn't UTF-8 makes it
> more difficult. It will not match the standard SDES format. I think it is
> desirable that we can have a single character and single byte in most
> cases, while still allowing for multiple ones in cases where there are many
> MIDs or RIDs. But basically if one uses 0-9, a-z, A-Z, and then goes to 00,
> 01, .. 0a, etc, then one can with two characters 62^2 = 3844 possible ids,
> and the scheme should not be restricted to just two if actually needed. The
> SDES has an upper limit of 255 bytes.
>
>
Okay, so I was going to suggest we leave RID alone and have an optional
suggestion that MID be a 16 bit integer, represented as an SDES-compatible
UTF-8 string (that should be 5 octets maximum).  Someone interested in code
re-use could always use that with RID as well, even though the RID document
doesn't have the same suggestion.  While this would be optional advice,
you're concerned that someone taking it would consume 10 of the  255
available octets?

regards,

Ted


> Cheers
>
> Magnus Westerlund
>
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Re: [MMUSIC] BUNDLE - MID Security - Updated text proposal