Thanks very much Daniel,

This is solving a part of my issue for now.
Here is the routing section of my configuration file (it may be good to share it once complete as a minimally working proxy):

route{
        if (!mf_process_maxfwd_header("10")) {
                sl_reply("483","Too Many Hops");
                break;
        }
        if (msg:len >= 4096 ) {
                sl_reply("513", "Message too big");

}

if (!method=="REGISTER") record_route();

if (!loose_route()) {
                $du = "sip:10.236.214.86:5060";
                #setdsturi("sip:10.236.214.86:5060"); #second way to do it
                if (!t_relay()) {
                        sl_reply_error();
                }

}
}

I am trying to set up a kamailio proxy on an EC2 VM using this configurations and have been running a UAC and a UAS using SIPp on two other machines (UAC <--> Kamailio Proxy <--> UAS):

UAC

sipp -sn uac -nr -r 1 -rp 1000 -d 0 -l 1 -p 5060 -trace_msg -i SELF_IP(UAC) -rsa PROXY_IP:5060 UAS_IP:5060

UAS:

sipp -sn uas -d 0 -p 5060 -i SELF_IP(UAS) -rsa PRXY_IP:5060 -trace_msg

It looks that messages go through, and are received by the server, but what I get back at the UAC (client) is a "dead call" error:

Last Error: Dead call 1-1734@10.140.34.188 (aborted at index 8), receive...

Is there a specific meaning to this "dead call" error? Is there anything that my proxy is missing in its routing or does it have to do with the UAC/UAS configs?

Thanks

Alireza

On Tue, Jun 17, 2014 at 5:11 AM, Daniel-Constantin Mierla <miconda@gmail.com> wrote:

Hello,

listen is to specify local ip address or network interface on which kamailio should listen for sip traffic.

To send to an ip address there are couple of variants, in config file:

$ru = "sip:" + $rU + "@__NEXT_PROXY_IP__";
t_relay();
exit;

Or, if you don't want to change the r-uri, then use:

$du = "sip:__NEXT_PROXY_IP__";
t_relay();
exit;

Of course, you have to replace the __NEXT_PROXY_IP__ with the appropriate value.

More dynamic option would be using dispatcher module.

Cheers,
Daniel

On 15/06/14 15:28, AliReza Khoshgoftar Monfared wrote:
Dear Kamailio users,

I am trying to set up a simple scenario as follows:

UAC --> Proxy_1 --> Proxy_2 --> Proxy_3 --> UAC

I am new to Kamailio and had the following basic questions that came to my mind after reading the documentation an the default kamilio.cfg config script:

1) Is there any good example of the above scenario in which the UAC and UAS (caller and callee) are modeled using SIPp and proxies are simple kamailio instances run on different machines that simply forward the SIP packets?

2) In specific, I want the proxies to simply forward the messages to their downstream (I do not care about registration or other operations and look for a minimally working simple SIP scenario). Is there any example of such configuration?

3) Let's imagine Proxy_2 in the above example, in the default config, it looks like that with modifying line 164, "listen=udp:10.0.0.10:5060" I can specify the address of its upstream, Proxy_1, but how and where shall I set the specifications of the downstream, Proxy_3?

I suspect it is somewhere in the Routing Logic block (line 449) but not sure how it is exactly done. I see a "route(SIPOUT)" call for example but I am not sure how and where the value of SIPOUT is modified. Is it a representation of the downstream servers in the config file?

Thanks,

Alireza
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