[SR-Users] Callee BYE routing issue

[Daniel W. Graham]

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 at 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 at 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 at 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 at 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 at 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 at 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 at 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 at 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 at 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 at UA1_IP:52884>
To: "Dan Test" <sip:398 at B2BUA_IP:5160>;tag=as78671fd9
From: <sip:399 at UA1_IP:52884;rinstance=705e0af5f4be485c;alias=NAT_Device_IP:~57808~1>;tag=64f4b712
Call-ID: 24dc84a4592515245177483c2a657042 at 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 at 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 at UA1_IP:52884>
To: <sip:398 at B2BUA_IP>;tag=as5874901f
From: <sip:399 at 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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