Re: [rtcweb] RTCWEB data channel protocol: Do both endpoints need to send DATA_CHANNEL_OPEN?

["Chenxin (Xin)" <[e-mail]>]

Hi Salvatore
>>
>> I also think it would be good to add some call flows to the draft.
>>
>>>> Q1: Assuming that both endpoints want to use the data channel, do both
>endpoints need to send DATA_CHANNEL_OPEN
>>>> (on separate SCTP streams)? Or, can one of the endpoints, if it has received
>DCO, start using the data channel (using a SCTP stream of its choice)?
>>>
>>> sorry I don't understand the question.
>>> Are you asking for both endpoints trying to open the same channel and how
>avoid glare in opening channels
>>> or you are looking in the scenario where both endpoints want to open to
>different channels?
>>
>> I am not talking about a glare situation.
>>
>> I am talking about where an endpoint has received a DCO, and replied with a
>DCA. Then, that endpoint also wants to use the data channel.
>
>well a DataChannel is bidirectional then it can be used to send data from both
>the sides once it is open.
>
>
>> Does it also have to send a DCO? I assume not, but I think it would be good to
>make that more clear.
>
>you are right, it has not to do.
>OK point taken, we will clarify this point also.
>
Do you means when has the DC been negotiated by out-band way?

Best Reagrds,
   Xin
>br
>Salvatore
>
>
>>
>> Regards,
>>
>> Christer
>>
>
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