### Description

Seems that topos is not adding Record-Route headers in this scenario.

### Troubleshooting

#### Reproduction

 

#### Log Messages

I've added some more debug to topos: https://paste.debian.net/1152674/ Full [kamailio-lb.log](https://github.com/kamailio/kamailio/files/4798522/kamailio-lb.log)

This is the part when processing of the 200 OK coming from PSTN(fake) ``` Jun 18 13:48:35 sp1 lb[14702]: DEBUG: topos [tps_msg.c:868]: tps_response_received(): handling incoming response Jun 18 13:48:35 sp1 lb[14702]: DEBUG: topos [tps_msg.c:376]: tps_pack_message(): compacted headers - x_via1: [SIP/2.0/UDP 127.0.0.1:5064;branch=z9hG4bKcf3d.49d855e2b5f83b9dff62c8a6b0cf23f8.0](80) - x_via2: [](0) - x_vbranch1: [z9hG4bKcf3d.49d855e2b5f83b9dff62c8a6b0cf23f8.0](46) Jun 18 13:48:35 sp1 lb[14702]: DEBUG: topos [tps_msg.c:485]: tps_pack_message(): compacted headers - a_rr: [](0) - b_rr: [](0) - s_rr: [](0) Jun 18 13:48:35 sp1 lb[14702]: DEBUG: topos [tps_msg.c:490]: tps_pack_message(): compacted headers - as_contact: [](0) - bs_contact: [](0) Jun 18 13:48:35 sp1 lb[14702]: DEBUG: topos [tps_storage.c:126]: tps_storage_lock_get(): tps lock get: 220 Jun 18 13:48:35 sp1 lb[14702]: DEBUG: topos [tps_msg.c:889]: tps_response_received(): loaded dialog a_uuid [atpsh-5eeb547f-3970-3] Jun 18 13:48:35 sp1 lb[14702]: DEBUG: topos [tps_storage.c:391]: tps_storage_link_msg(): downstream: yes - acontact: [] - bcontact: [sip:127.0.2.1:50603;transport=UDP] Jun 18 13:48:35 sp1 lb[14702]: DEBUG: topos [tps_storage.c:138]: tps_storage_lock_release(): tps lock release: 220 Jun 18 13:48:35 sp1 lb[14702]: DEBUG: topos [tps_msg.c:182]: tps_add_headers(): adding to headers(0) - [Via: SIP/2.0/UDP 127.0.0.1:5080;received=127.0.0.1;branch=z9hG4bKh2oO8aY.;rport=5080#015#012] Jun 18 13:48:35 sp1 lb[14702]: DEBUG: topos [tps_msg.c:910]: tps_response_received(): x_rr[] y_rr[] s_rr[sip:127.0.0.1:5064;r2=on;lr=on;ftag=5A412B38-5EEB5492000D683F-C3258700;ngcplb=yes;socket=udp:127.0.0.1:5064,sip:127.0.0.1;r2=on;lr=on;ftag=5A412B38-5EEB5492000D683F-C3258700;ngcplb=yes;socket=udp:127.0.0.1:5064] Jun 18 13:48:35 sp1 lb[14702]: DEBUG: topos [tps_msg.c:182]: tps_add_headers(): adding to headers(0) - [Record-Route: sip:127.0.0.1:5064;r2=on;lr=on;ftag=5A412B38-5EEB5492000D683F-C3258700;ngcplb=yes;socket=udp:127.0.0.1:5064,sip:127.0.0.1;r2=on;lr=on;ftag=5A412B38-5EEB5492000D683F-C3258700;ngcplb=yes;socket=udp:127.0.0.1:5064#015#012] Jun 18 13:48:35 sp1 lb[14702]: DEBUG: topos [tps_msg.c:182]: tps_add_headers(): adding to headers(0) - [P-SR-XBranch: z9hG4bKcf3d.49d855e2b5f83b9dff62c8a6b0cf23f8.0#015#012] Jun 18 13:48:35 sp1 lb[14702]: NOTICE: REPLY_FROM_OUTBOUND <script>: Reply from Outbound - S=200 - OK M=INVITE IP=«udp»:«127.0.2.1»:«50603» ID=«NGCP%invite_peerout_outbound_socket%///1-15281@127.126.0.1_b2b-1» UA='<null>' DESTIP=«127.0.0.1»:«5064» Jun 18 13:48:35 sp1 lb[14702]: NOTICE: REPLY_FROM_OUTBOUND <script>: NATed reply detected - ID=«NGCP%invite_peerout_outbound_socket%///1-15281@127.126.0.1_b2b-1» UA='<null>' Jun 18 13:48:35 sp1 lb[14702]: NOTICE: REPLY_FROM_OUTBOUND <script>: Sending reply from outbound, fs='«udp:127.0.0.1:5060»' du='«127.0.0.1»:«5080»' - ID=«NGCP%invite_peerout_outbound_socket%///1-15281@127.126.0.1_b2b-1» UA='<null>' Jun 18 13:48:35 sp1 lb[14702]: DEBUG: <null> topos [topos_mod.c:514]: tps_execute_event_route(): executing event_route[topos:topos:msg-sending] (2) Jun 18 13:48:35 sp1 lb[14702]: DEBUG: <null> topos [tps_msg.c:1038]: tps_response_sent(): handling outgoing response Jun 18 13:48:35 sp1 lb[14702]: DEBUG: <null> topos [tps_msg.c:376]: tps_pack_message(): compacted headers - x_via1: [SIP/2.0/UDP 127.0.0.1:5080;received=127.0.0.1;branch=z9hG4bKh2oO8aY.;rport=5080](79) - x_via2: [](0) - x_vbranch1: [z9hG4bKh2oO8aY.](15) Jun 18 13:48:35 sp1 lb[14702]: DEBUG: <null> topos [tps_msg.c:485]: tps_pack_message(): compacted headers - a_rr: [](0) - b_rr: [sip:127.0.0.1:5064;r2=on;lr=on;ftag=5A412B38-5EEB5492000D683F-C3258700;ngcplb=yes;socket=udp:127.0.0.1:5064,sip:127.0.0.1;r2=on;lr=on;ftag=5A412B38-5EEB5492000D683F-C3258700;ngcplb=yes;socket=udp:127.0.0.1:5064](214) - s_rr: [](0) Jun 18 13:48:35 sp1 lb[14702]: DEBUG: <null> topos [tps_msg.c:490]: tps_pack_message(): compacted headers - as_contact: [](0) - bs_contact: [](0) Jun 18 13:48:35 sp1 lb[14702]: DEBUG: <null> topos [tps_storage.c:126]: tps_storage_lock_get(): tps lock get: 220 Jun 18 13:48:35 sp1 lb[14702]: DEBUG: <null> topos [tps_msg.c:1068]: tps_response_sent(): loaded branch a_uuid [atpsh-5eeb547f-3970-3] Jun 18 13:48:35 sp1 lb[14702]: DEBUG: <null> topos [tps_storage.c:138]: tps_storage_lock_release(): tps lock release: 220 Jun 18 13:48:35 sp1 lb[14702]: DEBUG: <null> topos [tps_msg.c:182]: tps_add_headers(): adding to headers(0) - [Contact: sip:atpsh-5eeb547f-3970-3@127.0.0.1#015#012] Jun 18 13:48:35 sp1 lb[14702]: DEBUG: <null> topos [tps_msg.c:1101]: tps_response_sent(): x_rr[] y_rr[] s_rr[sip:127.0.0.1:5064;r2=on;lr=on;ftag=5A412B38-5EEB5492000D683F-C3258700;ngcplb=yes;socket=udp:127.0.0.1:5064,sip:127.0.0.1;r2=on;lr=on;ftag=5A412B38-5EEB5492000D683F-C3258700;ngcplb=yes;socket=udp:127.0.0.1:5064] Jun 18 13:48:35 sp1 lb[14702]: DEBUG: <null> topos [tps_storage.c:391]: tps_storage_link_msg(): downstream: yes - acontact: [] - bcontact: [sip:127.0.2.1:50603;transport=UDP] Jun 18 13:48:35 sp1 lb[14702]: DEBUG: <null> topos [topos_mod.c:454]: tps_msg_sent(): new outbound buffer generated ```

``` topos [tps_msg.c:910]: tps_response_received(): x_rr[] y_rr[] s_rr[sip:127.0.0.1:5064;r2=on;lr=on;ftag=5A412B38-5EEB5492000D683F-C3258700;ngcplb=yes;socket=udp:127.0.0.1:5064,sip:127.0.0.1;r2=on;lr=on;ftag=5A412B38-5EEB5492000D683F-C3258700;ngcplb=yes;socket=udp:127.0.0.1:5064] ``` proper Record-Route value is on `s_rr`

but [here](https://github.com/kamailio/kamailio/blob/93ab0791b409b9a708a1c7ac5cc4f94f75...) uses `x_rr` that is empty in this case

#### SIP Traffic

pcap files for the same scenario with and without topos

[no_topos.zip](https://github.com/kamailio/kamailio/files/4798553/no_topos.zip) [topos.zip](https://github.com/kamailio/kamailio/files/4798577/topos.zip)

### Additional Information

* **Kamailio Version** - output of `kamailio -v`

This is Sipwise version based on 5.3.4, no patches on topos apart of the debug one.