21 Mar
2023
21 Mar
'23
1:41 p.m.
### Description
We have faced an issue which appears when TOPOH module is enabled, call is made from
WebRTC client, then transferred by callee.
#### Scenario
WebRTC client behind load balancer makes call to softphone, call from softphone is
transferred to external number using Asterisk.
#### Expected result
When call is hanged up on external number side, call should be hanged up on WebRTC client
side.
#### Actual result
When call is hanged up on external number side, call is not hanged up on WebRTC client
side.
### Troubleshooting
#### Legend
10.5.0.145 - load balancer
10.128.150.67 - WebRTC client
10.181.0.1 - kamailio
10.5.2.192 - asterisk
#### Log Messages
On transfer:
https://pastebin.com/H3FQ4Kpj
On hangup from external number side:
https://pastebin.com/wgfRzGbd
On hangup from WebRTC client side:
https://pastebin.com/sE0yhBae
#### SIP Traffic
Faulty case with TOPOH module enabled:
[topoh_on.csv](https://github.com/kamailio/kamailio/files/11028205/topoh_on.…
Normal behavior with TOPOH module disabled:
[topoh_off.csv](https://github.com/kamailio/kamailio/files/11028206/topoh_of…
#### Config files
kamailio.cfg:
[kamailio.txt](https://github.com/kamailio/kamailio/files/11028283/kamailio.…
kamailio-local.cfg enabled toggles:
#!define WITH_MYSQL
#!define WITH_AUTH
#!define WITH_USRLOCDB
#!define WITH_DISPATCHER
#!define WITH_HOMER
#!define WITH_PSTN
#!define WITH_TOPOH
#!define WITH_CUSTOM_HEADERS
#!define WITH_PROM
#!define WITH_DMQ
#!define WITH_NAT
#!define WITH_XXXX_HEADERS
#!define WITH_TLS
#!define WITH_WEBSOCKET
#!define WITH_VOIP_AUTH
#!define WITH_ADVERTISE
#!define WITH_JSONRPC
#!define WITH_TCP
#!define WITH_DIALOG
#!define WITH_DIFF_PROVIDER_SRC_IP
#!define WITH_UAC
#!define WITH_DEV
### Additional Information
* **Kamailio Version** - output of `kamailio -v`
```
version: kamailio 5.6.1 (x86_64/linux)
flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST,
DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY,
USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR,
USE_DST_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED
ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535,
DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: unknown
compiled on 09:11:15 Nov 15 2022 with gcc 9.3.0
```
* **Operating System**:
```
dockerized kamailio running on Ubuntu 16.04.3 LTS
Docker version 18.03.1-ce, build 9ee9f40
```
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