Looping usually means, that Kamailio fails to detect that the message is
target to itself. This is often caused by if the SIP domain in the
request URI is not know to Kamailio's aliases.

If you can not fix it, enable debug=3 and watch how the message is
processed through the script to find out where the message is routed
falsely.


regards
Klaus

Am 29.07.2011 11:21, schrieb Coca:

> Dear List,
>
> I have Kamailio 3.1 installed in Amazon EC 2 server.
> Everything is working fine except that every REGISTER / MESSAGE was
> looped for twice or 3 times.
> And I am sure this is not caused by UA.
>
> I have attached the ngrep log in this message.
> And also, my main modification to the kamailio.cfg is like below:
>
> Your help will be great great appreciated.
>
> Thank you!!
>
> Coca
>
>
>
>
>
> ----------------------------------
>
> #!define WITH_MYSQL
> #!define WITH_NAT
>
>

> alias="mydomain.org <http://mydomain.org>"

> alias="xx.xx.xx.xx"
>
> advertised_address="xx.xx.xx.xx"
>
> ...
> ...
>
> route {
>
> # per request initial checks
> route(REQINIT);
>
> # NAT detection
> route(NAT);
>
> # handle requests within SIP dialogs
> route(WITHINDLG);
>
> ### only initial requests (no To tag)
>
> # CANCEL processing
> if (is_method("CANCEL"))
> {
> if (t_check_trans())
> t_relay();
> exit;
> }
>
> t_check_trans();
>
> # authentication
> route(AUTH);
>
> # record routing for dialog forming requests (in case they are routed)
> # - remove preloaded route headers
> remove_hf("Route");
> if (is_method("INVITE|SUBSCRIBE"))
> {
> #record_route();
> /* for NAT support */
> record_route_preset("xx.xx.xx.xx");
> }
>
> # account only INVITEs
> if (is_method("INVITE"))
> {
> setflag(FLT_ACC); # do accounting
> }
>
> # dispatch requests to foreign domains
> route(SIPOUT);
>
> ### requests for my local domains
>
> # handle presence related requests
> route(PRESENCE);
>
> # handle registrations
> route(REGISTRAR);
>
> if ($rU==$null)
> {
> # request with no Username in RURI
> sl_send_reply("484","Address Incomplete");
> exit;
> }
>
> # dispatch destinations to PSTN
> route(PSTN);
>
> # user location service
> route(LOCATION);
>
> route(RELAY);
> }
>
>
>
> # Handle SIP registrations
> route[REGISTRAR] {
> if (is_method("REGISTER"))
> {
> if(isflagset(FLT_NATS))
> {
> setbflag(FLB_NATB);
> # uncomment next line to do SIP NAT pinging
> setbflag(FLB_NATSIPPING);
> }
> if (!save("location"))
> sl_reply_error();
>
> exit;
> }
> }
>
>
>

> _______________________________________________
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> sr-dev@lists.sip-router.org
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