Re: [rtcweb] draft-ibc-rtcweb-sip-websocket -- WebSocket Transport for Session Initiation Protocol (SIP)

Partha,

I am not sure if you understood this from my emails before, but the main
advantage is that SIP does not work from behind NAT if TCP or TLS is used.
SIP is not intended for this and does not support this. You can try to build
something which is somewhat standard to implement SIP over TCP (TLS) from
behind NAT, but I do not think this is widely implemented at all.
_____________
Roman Shpount

On Tue, Sep 13, 2011 at 1:42 PM, Ravindran Parthasarathi <
pravindran@sonusnet.com> wrote:

> Hi Inaki,
>
> I like the idea of using SIP between browser & server.
>
> I really don't know the strong reason for tunneling SIP message within
> websocket. In fact, we are discussing SIP vs websocket in
> http://www.ietf.org/mail-archive/web/rtcweb/current/msg01071.html mail
> thread as signaling protocol for RTCweb. Could you please mention the
> technical advantage in going in the path of SIP over websocket rather than
> having plain SIP connection over TCP or TLS or (UDP or DTLS).
>
> Thanks
> Partha
>
> >-----Original Message-----
> >From: rtcweb-bounces@ietf.org [mailto:rtcweb-bounces@ietf.org] On Behalf
> >Of Iñaki Baz Castillo
> >Sent: Tuesday, September 13, 2011 10:43 PM
> >To: rtcweb@ietf.org
> >Subject: [rtcweb] draft-ibc-rtcweb-sip-websocket -- WebSocket Transport
> >for Session Initiation Protocol (SIP)
> >
> >Hi all,
> >
> >A draft describing a mechanism for usage of WebSocket protocol as the
> >transport between SIP entities has been submitted and can be found at:
> >
> >  HTML:  http://tools.ietf.org/html/draft-ibc-rtcweb-sip-websocket-00
> >  TXT:     http://www.ietf.org/id/draft-ibc-rtcweb-sip-websocket-00.txt
> >
> >
> >Abstract
> >
> >   This document specifies a WebSocket subprotocol for a new transport
> >   in SIP (Session Initiation Protocol).  The WebSocket protocol enables
> >   two-way realtime communication between clients (typically web-based
> >   applications) and servers.  The main goal of this specification is to
> >   integrate the SIP protocol within web applications.
> >
> >
> >We produced this initial version after implementing a working prototype.
> >
> >
> >Your feedback is always welcome,
> >The Authors
> >
> >
> >--
> >Iñaki Baz Castillo
> ><ibc@aliax.net>
> >_______________________________________________
> >rtcweb mailing list
> >rtcweb@ietf.org
> >https://www.ietf.org/mailman/listinfo/rtcweb
> _______________________________________________
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> rtcweb@ietf.org
> https://www.ietf.org/mailman/listinfo/rtcweb
>