Re: [hybi] hybi 10 ---- server to client masking

"Arman Djusupov" <arman@noemax.com> Wed, 20 July 2011 10:15 UTC

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From: "Arman Djusupov" <arman@noemax.com>
To: =?UTF-8?Q?'I=C3=B1aki_Baz_Castillo'?= <ibc@aliax.net>, "'Andy W. Song'" <wsongcn@gmail.com>
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Date: Wed, 20 Jul 2011 13:14:04 +0300
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Cc: hybi@ietf.org
Subject: Re: [hybi] hybi 10 ---- server to client masking
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> > A question about server to client masking. In section 4.1 it states 
> > that "Frames sent from the server to the client are not masked." 
> > Does it mean server to client masking is optional or MUST NOT?
> > Client to server is clear as "MUST" though.
> 
> "are not masked" means that they MUST NOT be masked.

I don't think you are correct. As far as I understand the discussions in the group over masking, the server to client masking is optional (server MAY MASK). Otherwise we would not need a masking flag in the frame header since client-to-server frames would always be masked and server-to-client frames would never be masked.

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

With best regards,
Arman