[Stox] review: stox-im-03

Salvatore Loreto <salvatore.loreto@ericsson.com> Fri, 20 September 2013 10:42 UTC

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Date: Fri, 20 Sep 2013 13:42:24 +0300
From: Salvatore Loreto <salvatore.loreto@ericsson.com>
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Subject: [Stox] review: stox-im-03
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I have reviewed the core-04 draft, and I think that is almost ready for 
the WGLC

my only comments is about the fact that section 3. XMPP to SIP
implies that the MESSAGE is always (and maybe can only be) delivered 
over a TCP connection;
RFC3428 states

    Whenever possible, MESSAGE requests SHOULD be sent over transports
    that implement end-to-end congestion control, such as TCP or SCTP.
    However, SIP does not provide a mechanism to prevent a downstream hop
    from sending a request over UDP.

so you can delivery it over UDP as well and that has also being raised 
in a previous thread
while talking on the Call-ID mapping to <thread/>.
Actually you will be forced to deliver over UDP if the SIMPLE server 
only supports UDP.

So I would suggest to change

    Here we assume that the XMPP server has
    determined the foreign domain is serviced by a SIMPLE server,

in

    Here we assume that the XMPP server has
    determined the foreign domain is serviced by a SIMPLE TCP server,


best regards
Salvatore

-- 
Salvatore Loreto, PhD
www.sloreto.com