Have an issue with BYE routing in a lab setup, any suggestions on what I should be looking at?

 

Topology:

 

UA1  <-> NAT device 1 <-> Proxy1 <-> Registrar/B2BUA <-> Proxy1 <-> NAT device 1 <-> UA2

 

All UA to UA calls flow through B2BUA.

 

All IP’s are public except for UA1 and UA2.

 

-Both endpoints can call each other.

-If the caller hangs up first, BYE is routed properly.

-If the callee hangs up first, BYE causes proxy to send 478.

 

On calls where BYE results in 478:

if(!isdsturiset()) {

    ……….…………………….not executed

    handle_ruri_alias()

}

return;

 

Example issue call: UA2 to UA1, UA1 hang-up.

 

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[DLGURI] c=[/usr/local/etc/kamailio/kamailio.cfg] l=540 a=16 n=if

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[DLGURI] c=[/usr/local/etc/kamailio/kamailio.cfg] l=532 a=24 n=isdsturiset

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[DLGURI] c=[/usr/local/etc/kamailio/kamailio.cfg] l=540 a=2 n=return

………..

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} tm [ut.h:245]: uri2dst2(): bad_uri: [sip::;transport=]

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} tm [t_fwd.c:1732]: t_forward_nonack(): failure to add branches

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[RELAY] c=[/usr/local/etc/kamailio/kamailio.cfg] l=275 a=24 n=sl_reply_error

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} sl [sl_funcs.c:401]: sl_reply_error(): stateless error reply used: Unresolvable destination (478/SL)

Apr 10 00:31:28 edgedev /usr/local/sbin/kamailio[5317]: ERROR: {1 2 BYE 24dc84a4592515245177483c2a657042@B2BUA_IP:5160} *** cfgtrace:dbg_cfg_trace(): request_route=[RELAY] c=[/usr/local/etc/kamailio/kamailio.cfg] l=277 a=2 n=exit

 

2020/04/10 00:31:28.625060 NAT_Device_IP:57808 -> Proxy_IP:5060

BYE sip:398@B2BUA_IP:5160 SIP/2.0

Via: SIP/2.0/UDP UA1_IP:52884;branch=z9hG4bK-524287-1---43b5f31829f20952

Max-Forwards: 70

Route: <sip:Proxy_IP;lr=on;ftag=as78671fd9;did=b1b.a27>

Contact: <sip:399@UA1_IP:52884>

To: "Dan Test" <sip:398@B2BUA_IP:5160>;tag=as78671fd9

From: <sip:399@UA1_IP:52884;rinstance=705e0af5f4be485c;alias=NAT_Device_IP:~57808~1>;tag=64f4b712

Call-ID: 24dc84a4592515245177483c2a657042@B2BUA_IP:5160

CSeq: 2 BYE

User-Agent: xxxxxxxxxxxxxxxx

Content-Length: 0

 

#########################################

 

For comparison, here is a BYE from another test call: UA1 to UA2, UA1 hang-up.

 

This BYE was routed correctly.

 

2020/04/10 00:44:02.688608 NAT_Device_IP:57808 -> Proxy_IP:5060

BYE sip:398@B2BUA_IP:5160 SIP/2.0

Via: SIP/2.0/UDP UA1_IP:52884;branch=z9hG4bK-524287-1---ce36df02e8a80a48

Max-Forwards: 70

Route: <sip:Proxy_IP;lr=on;ftag=9078f232;did=49e.8c01>

Contact: <sip:399@UA1_IP:52884>

To: <sip:398@B2BUA_IP>;tag=as5874901f

From: <sip:399@B2BUA_IP:5060>;tag=9078f232

Call-ID: 103104NGU1NjkxNGZkYmM4MzA3Y2FkMzY1OGNkZTZmMTMyZDU

CSeq: 3 BYE

User-Agent: xxxxxxxxxxxxxxxx

Authorization: Digest username= xxxxxxxxxxxxxxxx

Content-Length: 0

 

-dan

 

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