[SR-Users] MSRP communication through Kamailio

[Rajkumar Kanniappan]

Thanks Peter. So you mean to say kamailio doesnt support B2BUA for msrp communication? 

My client supports all the required MSRP SDP parameters and configurations are fine. Because I am able to see proper msrp headers in the initial INVITE.


Thanks


________________________________________
From: sr-users-bounces at lists.sip-router.org [sr-users-bounces at lists.sip-router.org] On Behalf Of Peter Dunkley [peter.dunkley at crocodilertc.net]
Sent: Monday, July 29, 2013 16:34
To: Kamailio (SER) - Users Mailing List
Subject: Re: [SR-Users] MSRP communication through Kamailio

There are two standards based options for MSRP.  Peer-to-peer between clients (RFC 4975) with no servers involved and traffic between clients relayed through a server (RFC 4976). RFC 4976 is used for NAT traversal and policy (security/logging/etc) enforcement.  The relay option requires the MSRP client to support additional MSRP request types, procedures, and SDP elements - essentially use of a relay requires the client to support this and be configured for it.

There is a third option which is not standards based, that is B2BUA'ing MSRP where a server pretends to be a pair of clients back-to-back. This is what a lot of SBCs do.

As a server that is not a B2BUA Kamailio supports MSRP relay as per RFC 4976.  However, your MSRP client needs to support RFC 4976 (and be correctly configured) to make use of the relay.

Regards,

Peter




On 29 July 2013 11:20, Rajkumar Kanniappan <rajkumar.kanniappan at sasken.com<mailto:rajkumar.kanniappan at sasken.com>> wrote:
Hi,

Is it possible to make MSRP to pass through kamailio instead of peer to peer?

For me, my sip client registers with kamailio without any problem and able to chat with other sip client as well.
But the chat communication using MSRP is always peer to peer, because of the SDP negotiation. But I need make the msrp messages to pass through the kamailio server.
Please help me in configuring the kamailio.


Thanks

________________________________
SASKEN BUSINESS DISCLAIMER: This message may contain confidential, proprietary or legally privileged information. In case you are not the original intended Recipient of the message, you must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message and you are requested to delete it and inform the sender. Any views expressed in this message are those of the individual sender unless otherwise stated. Nothing contained in this message shall be construed as an offer or acceptance of any offer by Sasken Communication Technologies Limited ("Sasken") unless sent with that express intent and with due authority of Sasken. Sasken has taken enough precautions to prevent the spread of viruses. However the company accepts no liability for any damage caused by any virus transmitted by this email.
Read Disclaimer at http://www.sasken.com/extras/mail_disclaimer.html

_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
sr-users at lists.sip-router.org<mailto:sr-users at lists.sip-router.org>
http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users




--
Peter Dunkley
Technical Director
Crocodile RCS Ltd