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Re: [MMUSIC] ICE-SIP-SDP: Concluding ICE statement

Christer Holmberg <christer.holmberg@ericsson.com> Tue, 23 July 2019 22:11 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Roman Shpount <roman@telurix.com>
CC: "mmusic@ietf.org" <mmusic@ietf.org>, "mmusic-chairs@ietf.org" <mmusic-chairs@ietf.org>
Thread-Topic: [MMUSIC] ICE-SIP-SDP: Concluding ICE statement
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Date: Tue, 23 Jul 2019 22:10:55 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mmusic/XYgPu5tUcKOOEvl_T4Q42_aRm1E>
Subject: Re: [MMUSIC] ICE-SIP-SDP: Concluding ICE statement
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Hi,

>> "Once the agent has successfully nominated a pair, the state of the check list associated with the pair is set to Completed.
>> Once the state of each check list is set to either Completed or Failed, for each Completed check list the
>> agent checks whether the nominated pair matches the default candidate pair. If there are one or more pairs that don't match,..."
>
> I am still unclear about Failed. I would prefer the last sentence to say:
>
> Once the agent has successfully nominated a pair, the state of the check list associated with the pair is set to Completed. 
> Once the state of each check list is set to either Completed or Failed, for each >Completed check list the 
> agent checks whether the nominated pair matches the default candidate pair. If there are one or more pairs that don't match, 
> or if there are any Failed check lists, and the peer did not indicate support for the 'ice2' ice-option, the controlling agent MUST 
> generate a subsequent offer (Section 3.4.1), in which the connection address, port and transport protocol in the "c=" and "m=" 
> lines associated with each data stream match the corresponding local information of the nominated pair for that data stream. 
> Data streams associated with a Failed check lists MUST be rejected by setting port in "m=" line to zero.

If there are Failed check lists, shouldn't there be a subsequent update with port set to zero no matter if there is 'ice2' or not?

RFC 8445 says that "The agent MUST take proper actions for removing the failed data stream."

Regards,

Christer

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