My use case is such that I want to be able to send a SIP MESSAGE destined for a single username to multiple users. In order to be able to map that target username to multiple usernames, I tried using rtjson and evapi/http (to generate the routing json), but none of them worked.

Is it the right approach? Is there any other way to programmatically generate multiple targets for SIP request? I am familiar with dynamic routing but I need more flexibility.

Initially, I tried sending the request to a different username but that didn't work and got the following message in the http async result route.

kamailio    | 19(25) ERROR: nathelper [nathelper.c:1461]: sdp_1918(): Unable to parse sdp body
kamailio    | 19(25) NOTICE: <core> [core/kemi.c:124]: sr_kemi_core_notice(): In evapi msg branch
kamailio    | 28(34) NOTICE: {2 6661 MESSAGE q6hikd6tumsr1dh35kvj} <core> [core/kemi.c:124]: sr_kemi_core_notice(): In evapi reply branch 

The message was received on the originally requested to user and also $tu still points to the original user instead of the new user even after executing the following code.


In http response, I receive the following and don't see any rtjson errors when init_routes is executed on it.


Please note that the request was sent to I have tried other combinations of above but nothing works.

I have already searched on Google and read relevant articles and blog posts. 

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