7 Feb
2022
7 Feb
'22
3:33 p.m.
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### Description
When dialog module needs to send keep-alive to caller and/or called it doens't check
if the ip address and port of the dialog is the current listening ip/port. If you have two
distinct kamailio instances sharing a single dialog database, both instances are sending
the OPTIONS and not just the one which handled the call at setup time.
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### Troubleshooting
#### Reproduction
Start two instance with a shared dialog database and db_mode set to 1 (realtime), set
property ka-src for every dialog in kamailio cfg. Setup a long call and restart the
instance not involved in the call. You should see it starting to send OPTIONS.
### Possible Solutions
In dlg_send_ka, if the ip/port stored in the dialog db is not present in the listening
ip/port set, skip the check.
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### Additional Information
* **Kamailio Version** - output of `kamailio -v`
```
version: kamailio 5.5.2 (x86_64/linux) 55e232
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
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: 55e232
compiled on 14:20:31 Aug 25 2021 with gcc 4.8.5
```
* **Operating System**:
Centos 7
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