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Re: [MMUSIC] Changes for draft-ietf-mmusic-trickle-ice-sip-14 - ABNF

Peter Saint-Andre <stpeter@mozilla.com> Mon, 07 May 2018 19:57 UTC

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To: Christer Holmberg <christer.holmberg@ericsson.com>, Thomas Stach <thomass.stach@gmail.com>, MMUSIC <mmusic@ietf.org>, "pkyzivat@alum.mit.edu" <pkyzivat@alum.mit.edu>
Cc: "mmusic-chairs@ietf.org" <mmusic-chairs@ietf.org>, "draft-ietf-mmusic-trickle-ice-sip@ietf.org" <draft-ietf-mmusic-trickle-ice-sip@ietf.org>
References: <d39c9615-ad46-a840-fd02-9a3eac4b53a9@gmail.com> <D7161134.2F512%christer.holmberg@ericsson.com> <919f4302-29b2-3f48-ffef-aab290bb6e96@gmail.com> <7594FB04B1934943A5C02806D1A2204B72EB88D8@ESESSMB109.ericsson.se>
From: Peter Saint-Andre <stpeter@mozilla.com>
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Date: Mon, 07 May 2018 13:57:21 -0600
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Subject: Re: [MMUSIC] Changes for draft-ietf-mmusic-trickle-ice-sip-14 - ABNF
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On 5/7/18 1:41 PM, Christer Holmberg wrote:
> Hi Thomas,
> 
> I hope Paul can jump in on this one too, since it’s ABNF related :)
> 
>>> However, I think there are some issue with the ABNF (not related to Adam¹s
>>> issue).
>>>
>>> For example, the syntax says:
>>>
>>>   ice-pwd-attribute      = %s"a" "=" ice-pwd-att
>>>
>>> Then the draft says:
>>>
>>>   with ice-pwd-attribute from [I-D.ietf-mmusic-ice-sip-sdp],
>>
>> which says 
>>
>> ice-pwd-att           = "ice-pwd:" password
>> i.e. doesn't introduce a second a=
> 
> First, I think the structure in draft-ice-sip-sdp is wrong. It shall be something like:
> 
>       Attribute Name: ice-pwd
> 
>       Attribute Value: ice-pwd-att
> 
>       Usage Level: media
> 
>       Charset Dependent: No
> 
>       Mux Category: TBD
> 
>     The Augmented BNF syntax [RFC5234] for the attribute is:
> 
>       ice-pwd-att = password
>       password = blah blah...
> 
> Now, whether we should use that syntax also in trickle-ice I don't know.

Do you mean in draft-ietf-mmusic-trickle-ice-sip or in
draft-ietf-ice-trickle? The latter document contains no ABNF definitions.

Peter

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