[SR-Users] Via shows wrong protocol of Kamailio

Henning Westerholt hw at skalatan.de
Thu Apr 18 08:43:03 CEST 2019


Hello Andrew,

4.1.x is really really old. Please update to a supported version of Kamailio, e.g. from the 5.1 or 5.2 branch. There are many bugs fixed.

Cheers,

Henning

Am 11.04.19 um 22:36 schrieb Andrew Chen:
Hi all,

Got another anomaly in 4.1.5.  I have this block of code which does t_relay_tcp:


        if ($var(isTpgw) == 1)

        {

                xlog("L_INFO","[$ci][$mi][CSeq $cs] isTpgw = $var(isTpgw)");


                if (!t_relay_to_tcp())

                {

                        xlog("L_INFO","[$ci][$mi][CSeq $cs] $ua Relaying [$rm] from ($si) to ($rd) via tcp....Error...\n");

                        t_on_failure("DISPATCHER_FAIL");

                }

                else

                {

                        xlog("L_INFO","[$ci][$mi][CSeq $cs] $ua Relaying [$rm] from ($si) to ($rd) via tcp\n");

                }

        }


But when I looked at my sip capture tool, it showed the Via marked by the Kam to use UDP:


INVITE sip:######@<some domain>:5060 SIP/2.0
Record-Route: <sip:206.81.191.30;r2=on;lr=on>
Record-Route: <sip:206.81.191.30;transport=tcp;r2=on;lr=on>
Call-ID: DL9dc0c8dd93-1079779342 at gs-3924.GSLAB.COM<mailto:DL9dc0c8dd93-1079779342 at gs-3924.GSLAB.COM>
To: "sip:6204857 at sjomaintpsg50.fuzemeeting.com<mailto:sip%3A6204857 at sjomaintpsg50.fuzemeeting.com>" <sip:6204857 at sjomaintpsg50.fuzemeeting.com<mailto:sip%3A6204857 at sjomaintpsg50.fuzemeeting.com>>
From: "LifesizeSIP" <sip:LifesizeSIP at gs-3924.GSLAB.COM:5060<http://sip:LifesizeSIP@gs-3924.GSLAB.COM:5060>>;tag=DL325a9e10c7;epid=062EE468
CSeq: 1 INVITE
Max-Forwards: 69
Via: SIP/2.0/UDP 206.81.191.30;branch=z9hG4bKb16b.bd6a0791c798e3c859f8608993d584ae.1;i=5611
Via: SIP/2.0/TCP 10.101.199.105:5060;rport=53272;branch=z9hG4bK-fc8090ecf8-DL

206.81.191.30 is the Kam.

I also log the activity as seen in the code with those xlog:


Apr 11 19:38:37 sjomaintpsg50 /usr/local/sbin/kamailio[16348]: INFO: <script>: [DL9dc0c8dd93-1079779342 at gs-3924.GSLAB.COM<mailto:DL9dc0c8dd93-1079779342 at gs-3924.GSLAB.COM>][42][CSeq 1] isTpgw = 1

Apr 11 19:38:37 sjomaintpsg50 /usr/local/sbin/kamailio[16348]: INFO: <script>: [DL9dc0c8dd93-1079779342 at gs-3924.GSLAB.COM<mailto:DL9dc0c8dd93-1079779342 at gs-3924.GSLAB.COM>][42][CSeq 1] LifeSize Softphone 8.1.12 (Windows) Relaying [INVITE] from (10.101.19

9.105) to (206.81.191.72) via tcp


So why did the Kamailio mark the Via header on the outgoing INVITE UDP?


--
Andy Chen
Sr. Telephony Lead Engineer
achen@<mailto:achen at thinkingphones.com>fuze.com<http://fuze.com>



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--
Henning Westerholt - https://skalatan.de/blog/
Kamailio services - https://skalatan.de/services
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