Re: [rtcweb] I-D Action: draft-ietf-rtcweb-data-protocol-01.txt

In Chrome, the stream identifier isn't chosen until the DTLS roles are
known; as Michael says, this is fine because the DTLS roles are known
before the SCTP association starts up.

Note that the DTLS roles can change during the lifetime of the call, so the
initial role ends up being the one that is used.

On Thu, Oct 24, 2013 at 10:06 AM, Michael Tuexen <
Michael.Tuexen@lurchi.franken.de> wrote:

> On Oct 24, 2013, at 6:59 PM, "Ejzak, Richard P (Richard)" <
> richard.ejzak@alcatel-lucent.com> wrote:
>
> > I have a question about draft-ietf-rtcweb-data-protocol-01.  The browser
> uses DTLS role to determine which side uses even or odd stream identifiers.
>  What does the application on the side sending the initial SDP offer that
> establishes the peer connection do if it wants to create data channels
> before the DTLS role can be determined?  How does the browser know if the
> application tries to select a disallowed stream id?  If the application
> asks the browser to select the stream identifier before DTLS role can be
> determined, what does the browser do?
> Hmm. You can't setup a data channel before you have setup the SCTP
> association which you
> can't setup before the DTLS handshake is complete. So how do you want to
> setup a data channel
> before knowing the DTLS role?
>
> Best regards
> Michael
> >
> > Thanks,
> > Richard
> >
> > _______________________________________________
> > rtcweb mailing list
> > rtcweb@ietf.org
> > https://www.ietf.org/mailman/listinfo/rtcweb
> >
>
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