Re: [rtcweb] I-D Action: draft-ietf-rtcweb-data-channel-04.txt

Salvatore Loreto <salvatore.loreto@ericsson.com> Wed, 06 March 2013 10:45 UTC

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Date: Wed, 6 Mar 2013 11:45:30 +0100
From: Salvatore Loreto <salvatore.loreto@ericsson.com>
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Subject: Re: [rtcweb] I-D Action: draft-ietf-rtcweb-data-channel-04.txt
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On 3/6/13 11:40 AM, MARCON, JEROME (JEROME) wrote:
>>> > >4. What happens if the SDP Opening Handshake agreed on some
>> >data channels using the 'chat' subprotocol, and later on an
>> >endpoint creates in-band a new channel with 'file transfer'
>> >subprotocol ?
>> >
>> >When you create a channel, it sends Open on an unused Stream.
>> >
>> >
> That does not answer to my question, so I reformulate: some time after the initial SDP Opening Handshake, can the DATA_CHANNEL_OPEN message create in-band a data channel with a 'subprotocol' not negotiated by the initial SDP Opening Handshake ?
>
I do think it should be possible to do it in-band

However I agree with you that an important side question is if/when that 
will be also signaled via SDP

/Salvatore