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

[Roman Shpount <[e-mail]>]

On Thu, Mar 5, 2015 at 8:26 AM, Makaraju, Maridi Raju (Raju) <
[e-mail]> wrote:

> This is not allowed by http://tools.ietf.org/html/rfc5245#section-8.1.1.2
> , unless webrtc overrides it.
> A can only send DTLS once final nomination, which happens after all valid
> pairs are found, is done.
>

I think you are misreading
http://tools.ietf.org/html/rfc5245#section-8.1.1.2: An end point can start
sending media once a valid pair is discovered for each component (which is
actually one component in case of bundle, one component per m= line in case
of no bundle and rtcp-mux, and two components per m= line in case of
neither). New valid pairs can still be found when media is being sent and
media should be switched to the valid pair with the highest priority. When
all the pairs are checked the final nomination request is sent, but the
media will start flowing way before that. Alternative would be almost
unusable since pair of two private IPs for two end-point each behind NAT
will never get nominated and it will take a long time to time out,
preventing media from flowing long after call is connected.
_____________
Roman Shpount