Re: [rtcweb] #13: Transport of DATA_CHANNEL_OPEN

[Randell Jesup <[e-mail]>]

On 4/29/2013 9:40 AM, Bernard Aboba wrote:
> I would also note that the maximum number of streams can be indicated in the association negotiation.  So if there is concern about unexpected data channels and associated data, that mechanism can be used. If the application knows how many streams it will need, might it not be wise to indicate this in association setup?

The number of streams in the SDP is the initial number of streams (with 
a suggested default of 16).  That's entirely an optimization to avoid 
the application needing to immediately need to renegotiate a larger 
number, or to have a large number of never-used channels if the default 
was set way too high.

If streams are needed past the number currently allocated, an increase 
will be requested and the createDataChannel queued.  (Note: this applies 
to pre-negotiated channels using streams past the currently allocated 
number as well).

-- 
Randell Jesup
[e-mail]