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Re: [rtcweb] DTLS, DTLS-SRTP, and 5-tuples

Paul Kyzivat <pkyzivat@alum.mit.edu> Sun, 08 March 2015 22:56 UTC

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Date: Sun, 08 Mar 2015 18:57:00 -0400
From: Paul Kyzivat <pkyzivat@alum.mit.edu>
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Subject: Re: [rtcweb] DTLS, DTLS-SRTP, and 5-tuples
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On 3/5/15 8:44 AM, Christer Holmberg wrote:
> Hi,
>
>> Thanks. I remember now what it may happens:
>>
>> - A sends USE-CANDIDATE requests in parallel.
>> - A receives the ok response from one of them.
>> - A sends DTLS ClientHello.
>> - A receives the ok response with higher priority from another pair.
>> - A then continues sending media (maybe remaining DTLS stuff or RTP) for that pair.
>
> Just to clarify: when you say "continues sending", you are NOT saying that A "starts over" by sending a new initial ClientHello on the new pair - instead A only switches to the other pair and continues with normal DTLS setup procedures?
>
> ...which means that both the client and server may receive DTLS messages, associated with the same DTLS connection setup, on different 5-tuples?

To get back to a point that Christer made some time ago on this thread:

This stuff is *not* "rtcweb" stuff - it has much broader import. It 
needs to be specified more generally.

	Thanks,
	Paul

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