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Re: [rtcweb] Constraint to disable IPv6 candidate collection

Iñaki Baz Castillo <ibc@aliax.net> Fri, 10 April 2015 12:31 UTC

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From: Iñaki Baz Castillo <ibc@aliax.net>
Date: Fri, 10 Apr 2015 13:52:26 +0200
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To: Harald Alvestrand <harald@alvestrand.no>
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Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>
Subject: Re: [rtcweb] Constraint to disable IPv6 candidate collection
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2015-04-10 11:29 GMT+02:00 Harald Alvestrand <harald@alvestrand.no>:
> We're talking about the c= line, which is meaningless semantic noise
> added to SDP for backwards compatibility, and which all conformant
> WebRTC implementations will ignore in favor of the ICE candidate lines.
>
> The only purpuse the c= line has in the WebRTC context is to serve as
> fodder for intercepting proxies that read the SDP and take action based
> on the c= line because they don't understand ICE candidates.
>
> The claim that has been made is that putting IPv6 addresses into the c=
> line causes parsing of the SDP to fail in certain contexts.

+1

Please don't add stuff to the WebRTC just to make some browsers' or
WebRTC devices' old SDP stacks work. If a SDP stack in 2015 is not
capable of parsing an IPv6 in the meaningless c= line that's vendor's
fault and something the vendor must fix ASAP.


-- 
Iñaki Baz Castillo
<ibc@aliax.net>

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