### Description
I have enabled `tcp_accept_haproxy=yes`, inbound TCP connection received on
IPv6 kamailio socket but client real IP is IPv4.
When kamailio add `Record-Route` header then added IPv6 header and not added
IPv4.
Example
```
INVITE sip:[email protected] SIP/2.0
Record-Route: <sip:9sovfn2oP7ozLQID7BkFxBNt/CfE+wc=@[2600::6]:5060;r2=on;lr=on>
Record-Route:
<sip:9sovfn2oP7ozLQID7BkFxBNt/CfE+wc=@[2600::6]:5060;transport=tcp;r2=on;lr=on>
```
>From client perspective Kamailio make protocol conversion from the IPv4 to
>IPv6, and expected to see IPv4 in the IPv4 address in the received
>'Record-Route' headers to use in the future requests.
Because client receiving IPv6 only and client does not have IPv6 address, then
`ACK` message cannot be send to Kamailio.
### Expected behavior
Kamailio will use Kamailio server load balancer address to generate
`Record-Route` headers.
Load balancer IP address can be received from the HAPROXY protocol.
#### Actual observed behavior
Kamailio use listeneer socket IP to generate `Record-Route` headers.
--
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https://github.com/kamailio/kamailio/issues/3666
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