[OpenSIPS-Users] RTP Proxy Port not updating on T38 reinvite

Sat Mar 3 17:29:32 EST 2018

Hi Răzvan,

Thanks for your help.  I hope this is the information that you need.

Fax Machine initial invite uses port 7124, on the T38 reinvite it uses 7130.

Log file    (fax.log)    -  https://www.4shared.com/file/kTeukVK8ca/fax.html

PCAP file (fax.pcap) - https://www.4shared.com/file/EhgKFV4bca/fax.html

The PCAP is taken from the fax machine.

The fax machine is at 216.147.191.171

The rtpproxy is at 216.147.191.232

Note in the PCAP that the RTPProxy continues to send data to the original port even after the T38 Re-Invite.

I noticed in the fax.log (rtpproxy log) that there is a 

:_rtpp_stream_check_latch_override: callee's address re-latched: 216.147.191.171:7124 (RTP), SSRC=0x6CEEBB4A, Seq=43488->43500

Where 7124 is the old port.

Regards,
Pat Burke

-----Original Message----- 
> From: "Răzvan Crainea" <razvan at opensips.org> 
> To: users at lists.opensips.org 
> Date: 03/02/18 03:46 
> Subject: Re: [OpenSIPS-Users] RTP Proxy Port not updating on T38 reinvite 
> 
> Hi, Pat!
> 
> Can you send over the logs from rtpproxy? Perhaps I can figure out why 
> rtpproxy is not sending RTP to the new port.
> 
> Best regards,
> Răzvan
> 
> On 03/01/2018 05:01 AM, Pat Burke wrote:
> > We have a situation where a fax comes in, all of the negotiation looks 
> > good (ports are translated like they are supposed to be), and the 
> > interface with RTP Proxy looks correct (at least to me).  But what 
> > happens is that after the Re-INVITE for T38, the RTP Proxy continues to 
> > sent the RTP to the customer's old port.  In the example below, RTP 
> > Proxy sends the RTP to the customer on port 7186 AFTER the Re-INVITE 
> > with the new port.
> > 
> > 
> > SIP trace is located at https://www.4shared.com/file/wIVrkOtnei/SIP.html
> > 
> > 
> >  From the SIP responses, it appears that the code is performing 
> > correctly.  Not certain what to try next.
> > 
> > 
> > Also, the RTP Proxy server was rebooted.
> > 
> > 
> > Any suggestions?
> > 
> > 
> > Thanks in advance,
> > 
> > Pat
> > 
> > 
> > 
> > 
> > 
> > Configuration:
> > 
> >      OpenSIPS 2.2.3 on Ubuntu 16.04
> > 
> >      RTP Proxy 2.2.alpha.20160822 on Ubuntu 16.04
> > 
> > 
> > 
> > 
> > ***************************************************
> > 
> > *** OpenSIPS re-Invite code.
> > 
> > 
> > if (has_totag()) {
> > 
> > if (is_method("BYE")) {
> > if ($avp(call_end_seconds) == NULL) {
> > $avp(bye_src_ip) := $si;
> > $avp(bye_time) := $Ts;
> > get_timestamp($avp(call_end_seconds),$avp(call_end_useconds));
> > 
> > $json(end_recording_details) := "{}";
> > $json(end_recording_details/endsec) = $avp(call_end_seconds);
> > $json(end_recording_details/endusec) = $avp(call_end_useconds);
> > 
> > xlog("L_INFO", "$dlg_val(rU) SCRIPT:RTPPROXY:DEBUG: End call recording 
> > callid=$ci ; ft= $ft data = $json(end_recording_details) \n");
> > 
> > 
> > #async(avp_db_query("UPDATE recordings SET end_recording_details = 
> > '$json(end_recording_details)' WHERE call_id = '$ci'", ""), resume_totag);
> > avp_db_query("UPDATE recordings SET end_recording_details = 
> > '$json(end_recording_details)' WHERE call_id = '$ci'", "");
> > 
> > } else {
> > xlog("L_INFO", "$dlg_val(rU) SCRIPT:BILLING:DEBUG: Extra BYE received.\n");
> > }
> > }
> > 
> > if (loose_route() || match_dialog()) {
> > if ( $DLG_status==NULL ) {
> > if (is_method("ACK") && t_check_trans() ) {
> > t_relay();
> > exit;
> > }
> > xlog("L_WARN", "$rU SCRIPT:TRAFFIC:WARNING: - $rm is not in-dialog ( 
> > callid=$ci ; ruri=$ru ; route=$(hdr(Route)[*]) )\n");
> > exit;
> > } else {
> > if (is_method("INVITE")) {
> > record_route();
> > if (stream_exists("image") && $dlg_val(t38) == "0") {
> > xlog("L_WARN", "$rU SCRIPT:FAX:DEBUG: Received RE-INVITE containing FAX, 
> > but carrier doesn't support it - rejecting $ci \n");
> > send_reply("488","Not Acceptable");
> > exit;
> > }
> > 
> > xlog("L_INFO", "$dlg_val(rU) SCRIPT:RTPPROXY:DEBUG: - 
> > $dlg_val(proxy_media) - $dlg_val(rtpproxy_group) - 
> > $dlg_val(customer_record)\n");
> > # Setup proxy media
> > if ($dlg_val(proxy_media) != NULL && $dlg_val(proxy_media) == "1") {
> > if (nat_uac_test("8")) {
> > rtpproxy_offer("co",,"$dlg_val(rtpproxy_group)", "$avp(rtpprpoxy_server)");
> > } else {
> > rtpproxy_offer("cor",,"$dlg_val(rtpproxy_group)", "$avp(rtpprpoxy_server)");
> > }
> > 
> > $avp(rtpprpoxy_server) := $(avp(rtpprpoxy_server){s.select,1,:});
> > if ($dlg_val(customer_record) == "1") {
> > rtpproxy_start_recording("$dlg_val(rtpproxy_group)");
> > }
> > 
> > xlog("L_INFO", "$dlg_val(rU) PHB - D - media = $(rb{sdp.line,c}) rtp = 
> > $avp(rtpprpoxy_server) \n");
> > }
> > 
> > t_on_reply("media");
> > }
> > 
> > t_relay();
> > exit;
> > }
> > } else {
> > if ( is_method("ACK") ) {
> > if ( t_check_trans() ) {
> > t_relay();
> > exit;
> > } else
> > exit;
> > }
> > sl_send_reply("404","Not here");
> > exit;
> > }
> > 
> > 
> > 
> > ***************************************************
> > 
> > *** RTP Ports in the call flow
> > 
> > 
> >                Carrier                               OpenSIPS            
> >                    Customer
> > 
> > 
> > Audio      61616 <<<<<<<<<<<<<<<<< 18986 <<<<<<<<<<
> > 
> >                                    >>>>>>>>>>>>>> 16930 >>>>>>>>>>>>>> 
> > 7186    (intial INVITE / 200 OK)
> > 
> > 
> > Image                       >>>>>>>>>>>>>> 16930 >>>>>>>>>>>>>> 7192    
> > (Re-INVITE / 200 OK - T38)
> > 
> > 
> >                    61616 <<<<<<<<<<<<<<<<< 18986 <<<<<<<<<<
> > 
> > 
> > ***************************************************
> > 
> > *** RTP Proxy Command TRACE
> > 
> > 
> > #
> > 
> > U 216.147.191.162:41657 -> 216.147.191.232:9992
> > 
> > 1422_78032 Uc0,18,101 1917630487_62491918 at 208.93.41.184 208.93.41.140 
> > 61616 gK0c00bce5;1
> > 
> > #
> > 
> > U 216.147.191.232:9992 -> 216.147.191.162:41657
> > 
> > 1422_78032 18986 216.147.191.232
> > 
> > 
> > #
> > 
> > U 216.147.191.162:41657 -> 216.147.191.232:9992
> > 
> > 1422_78033 Lc0,101 1917630487_62491918 at 208.93.41.184 216.147.191.171 
> > 7186 gK0c00bce5;1 5a142640;1
> > 
> > #
> > 
> > U 216.147.191.232:9992 -> 216.147.191.162:41657
> > 
> > 1422_78033 16930 216.147.191.232
> > 
> > 
> > #
> > 
> > U 216.147.191.162:41657 -> 216.147.191.232:9992
> > 
> > 1422_78034 U 1917630487_62491918 at 208.93.41.184 216.147.191.171 7192 
> > 5a142640;1 gK0c00bce5;1
> > 
> > #
> > 
> > U 216.147.191.232:9992 -> 216.147.191.162:41657
> > 
> > 1422_78034 16930 216.147.191.232
> > 
> > 
> > #
> > 
> > U 216.147.191.162:41657 -> 216.147.191.232:9992
> > 
> > 1422_78035 L 1917630487_62491918 at 208.93.41.184 208.93.41.140 61616 
> > 5a142640;1 gK0c00bce5;1
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > _______________________________________________
> > Users mailing list
> > Users at lists.opensips.org
> > http://lists.opensips.org/cgi-bin/mailman/listinfo/users
> > 
> 
> -- 
> Răzvan Crainea
> OpenSIPS Core Developer
>    http://www.opensips-solutions.com
> OpenSIPS Summit 2018
>    http://www.opensips.org/events/Summit-2018Amsterdam
> 
> _______________________________________________
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