Re: [hybi] Comments about draft-13

[Bjoern Hoehrmann <[e-mail]>]

* Greg Wilkins wrote:
>If the application layer accepts a connection with "foo" and "bar"
>then obviously it is saying that it has a way to tell the difference
>between "foo" and "bar" messages, because it is the application layer
>that does the protocol handling.
>
>If the application can't handle multiple protocols, or a particular
>mix of protocols, then it just doesn't accept the connection, or
>accepts with only 1 protocol.
>
>I see no reason the WS layer needs to get involved - including
>policing that there are [0,1] protocols accepted.

There is always exactly one sub-protocol, the only difference is that
you can identify the sub-protocol if you want to. If you intermix foo
and bar then the definition of how they are mixed is the sub-protocol
and "foo" and "bar" handling occurs on a layer below it. Sub-protocols
are things you can write a reliable Wireshark dissector for. You can
write one for "foo", but you cannot write one for "foo and bar mixed
in some unidentified application-specific manner".
-- 
Björn Höhrmann · mailto:[e-mail] · http://bjoern.hoehrmann.de
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