Via shows wrong protocol of Kamailio - sr-users

11 Apr 2019

      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@gs-3924.GSLAB.COM
To: "sip:6204857@sjomaintpsg50.fuzemeeting.com"
sip:6204857@sjomaintpsg50.fuzemeeting.com
From: "LifesizeSIP"
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@gs-3924.GSLAB.COM][42][CSeq 1] isTpgw = 1
Apr 11 19:38:37 sjomaintpsg50 /usr/local/sbin/kamailio[16348]: INFO:
<script>: [DL9dc0c8dd93-1079779342@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@ achen@thinkingphones.comfuze.com

-- 
*Confidentiality Notice: The information contained in this e-mail and any

attachments may be confidential. If you are not an intended recipient, you

are hereby notified that any dissemination, distribution or copying of this

e-mail is strictly prohibited. If you have received this e-mail in error,

please notify the sender and permanently delete the e-mail and any

attachments immediately. You should not retain, copy or use this e-mail or

any attachment for any purpose, nor disclose all or any part of the

contents to any other person. Thank you.*