[OpenSIPS-Users] Relaying instant messages to all UAs on same account

[Adrian Georgescu]

SIP signaling was not designed to accommodate such advanced scenarios. No matter how much you try you will fail making a coherent chat system using a limited tool like MESSAGE method which has no way to group messages part of a dialog, messages can be lost or they come out of logical sequence, the message size is subject to fragmentation in intermediaries, there is no way to reject or accept them, there is no meaningful way to confirm receipt, they fork to all devices, it is simply a big mess.

For chat sessions with SIP you should use MSRP protocol (RFC 4975) where things just work including multi-party conferencing.

Adrian

On Sep 10, 2011, at 10:06 AM, Bret McDanel wrote:

> I am having problems getting the following to work.
> 
> Alice has multiple registrations using the same credentials, lets call
> them Alice[1] and Alice[2].
> 
> When Alice[1] sends an instant message to Bob then Alice[2] should also
> get a copy of what Alice[1] sent.  It should not be sent back to the
> original sender however, in this example Alice[1].
> 
> In this way the full conversation will appear on all registrations of
> the same credentials instead of only seeing the responses.
> 
> 
> If I just resend the message back to Alice then both will get it.  I
> have tried to pull a list of contacts and filter the sender and resend
> that way which failed.
> 
> 
> I had thought of using the conferencing stuff but was having some issues
> with that as well.  I had thought that if, on registration, I forced the
> contact into a conference I could send a message to that conference as
> well as to the original destination.  I have not been able to suitably
> get this to work as well.  
> 
> 
> 
> Any assistance getting this functionality to work would be appreciated.
> 
> 
> -- 
> Trixter aka Bret McDanel
> website:  http://www.0xdecafbad.com
> pgp key:  http://bit.ly/9XYK4b
> 
> 
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