Environment

Kamailio-433 installed behind nat (Amazon EC2 or Google Compute Engine) using config

listen=PRIVATE_IP:PORT advertise PUBLIC_IP:PORT

What I wanted to do

In table location, the column socket will be stored in the form of "PROTO:PRIVATE_IP:PORT" while for some reasons I would like it to be stored as "PROTO:PUBLIC_IP:PORT"

Through the registrar document there is the xavp_cfg parameter that can be used in conjunction with the attribute "socket" to specify the socket string From my understanding this might be the solution to my requirement

Problem

The column locationsocket wasn't changed when setting the custom socket string via xavp_cfg

After looking into the source code, firstly, a potential bug (correct me if I'm wrong) that it would reset the sock_flag to -1 (no flags) even if reg_xavp_cfg and sock_flag is set A pull request #470 has been opened for this

Secondly, if we pass the above problem, in savec it did grab the socket string from xavp_cfg and in function grep_sock_info() the socket string was checked with all the address we listen on, including the advertised public address via socket_info->useinfo But the returned socket structure still contains the private address info

Conclusion so far

So, I wasn't sure if using the parameter xavp_cfg for setting socket string and stores it in location table make sense or not If yes, can you please giving me some hints about the potential way to extend this?

Cheers,
Ian

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