Hello,

seems are you doing record_route()/loose_route() processing, right? You need to change the scenario of the sipp to handle the Record-Route headers. The ACK should arrive to kamailio with a Route header.

Cheers, Daniel

On 10/07/08 22:07, Alex R.S.M wrote:

Oct 7 15:05:12 lab-linux01 kamailio: DBG:uri:has_totag: totag found Oct 7 15:05:12 lab-linux01 kamailio: DBG:core:pv_get_dsturi: no destination URI Oct 7 15:05:12 lab-linux01 kamailio: DBG:core:parse_headers: flags=200 Oct 7 15:05:12 lab-linux01 kamailio: DBG:core:get_hdr_field: content_length=0 Oct 7 15:05:12 lab-linux01 kamailio: DBG:core:get_hdr_field: found end of header Oct 7 15:05:12 lab-linux01 kamailio: DBG:rr:find_first_route: No Route headers found Oct 7 15:05:12 lab-linux01 kamailio: DBG:rr:loose_route: There is no Route HF Oct 7 15:05:12 lab-linux01 kamailio: DBG:core:parse_headers: flags=78 Oct 7 15:05:12 lab-linux01 kamailio: DBG:tm:t_lookup_request: start searching: hash=14964, isACK=1 Oct 7 15:05:12 lab-linux01 kamailio: DBG:tm:matching_3261: RFC3261 transaction matching failed Oct 7 15:05:12 lab-linux01 kamailio: DBG:tm:t_lookup_request: no transaction found Oct 7 15:05:12 lab-linux01 kamailio: DBG:core:destroy_avp_list: destroying list (nil)

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From: alex_rsm@hotmail.com To: users@lists.kamailio.org Date: Tue, 7 Oct 2008 14:31:28 -0400 Subject: [Kamailio-Users] ACK without matching transaction discarded

Hi,

I am using openSER as a proxy for a simple SIP call (UAC <--> openSER <--> UAS). openSER receives ACK from callee but doesn't send it to caller. It seems openSER can not find a matching transaction, so it ignore and discard the message.

     if ( is_method("ACK") )
     {
        if ( t_check_trans() )
        {
           t_relay();
           exit;
        }
        else
        {
          # ACK without matching transaction ... ignore and 

discard.\n"); exit; }

Here is the message header:

Internet Protocol, Src: 10.0.0.174 (10.0.0.174), Dst: 10.0.0.160 (10.0.0.160) ... ACK sip:9134750000@10.0.0.183:5080 SIP/2.0 Via: SIP/2.0/UDP 10.0.0.174:5040;branch=z9hG4bK-12255-1-4 From: sip:9133750000@10.0.0.174:5040;tag=1 To: sip:9134750000@10.0.0.183:5080;tag=1 Call-ID: 1-12255@10.0.0.174 CSeq: 1 ACK Contact: sip:sipp@10.0.0.174:5040 Max-Forwards: 70 Subject: Performance Test Content-Length: 0

and here is the debug log:

Oct 7 15:05:12 lab-linux01 kamailio: DBG:uri:has_totag: totag found Oct 7 15:05:12 lab-linux01 kamailio: DBG:core:pv_get_dsturi: no destination URI Oct 7 15:05:12 lab-linux01 kamailio: DBG:core:parse_headers: flags=200 Oct 7 15:05:12 lab-linux01 kamailio: DBG:core:get_hdr_field: content_length=0 Oct 7 15:05:12 lab-linux01 kamailio: DBG:core:get_hdr_field: found end of header Oct 7 15:05:12 lab-linux01 kamailio: DBG:rr:find_first_route: No Route headers found Oct 7 15:05:12 lab-linux01 kamailio: DBG:rr:loose_route: There is no Route HF Oct 7 15:05:12 lab-linux01 kamailio: DBG:core:parse_headers: flags=78 Oct 7 15:05:12 lab-linux01 kamailio: DBG:tm:t_lookup_request: start searching: hash=14964, isACK=1 Oct 7 15:05:12 lab-linux01 kamailio: DBG:tm:matching_3261: RFC3261 transaction matching failed Oct 7 15:05:12 lab-linux01 kamailio: DBG:tm:t_lookup_request: no transaction found Oct 7 15:05:12 lab-linux01 kamailio: DBG:core:destroy_avp_list: destroying list (nil)

Am I missing anything?

Thanks, Alex

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