[sr-dev] [kamailio/kamailio] tcp_reuse_port: ACK cannot be delievered to WebRTC client (#2849)

[sergey-safarov]

### Description

I have working Kamailio config for WebRTC clients.
I now want to use `tcp_reuse_port` feature and this feature breaks WebRTC clients.

#### Log Messages

```
106(106803) DEBUG: {1 41089865 ACK d50c83b4-124a-11ec-a038-835ce78b460e} <core> [core/forward.c:578]: forward_request(): orig. len=865, new_len=741, proto=5
106(106803) DEBUG: {1 41089865 ACK d50c83b4-124a-11ec-a038-835ce78b460e} <core> [core/forward.h:169]: msg_send_buffer(): sending to: 109.121.188.190:56424, force_socket=4, send_sock=0xffffa40ffa98
106(106803) WARNING: {1 41089865 ACK d50c83b4-124a-11ec-a038-835ce78b460e} <core> [core/forward.h:203]: msg_send_buffer(): TCP/TLS connection for WebSocket could not be found
106(106803) ERROR: {1 41089865 ACK d50c83b4-124a-11ec-a038-835ce78b460e} sl [sl_funcs.c:418]: sl_reply_error(): stateless error reply used: Unfortunately error on sending to next hop occurred (477/SL)
```
More logs at the attached `ack.log` file.
[ask.log](https://github.com/kamailio/kamailio/files/7144893/ask.log)

### Additional Information

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

used master branch with small customization, base commit c503d2bd31a580138a67f1d4a265ccde5791d271

* **Operating System**:
aarch64
```
[root at tmp kamailio]# cat /etc/os-release 
NAME="CentOS Linux"
VERSION="8"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="8"
PLATFORM_ID="platform:el8"
PRETTY_NAME="CentOS Linux 8"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:8"
HOME_URL="https://centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"
CENTOS_MANTISBT_PROJECT="CentOS-8"
CENTOS_MANTISBT_PROJECT_VERSION="8"
```


-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/kamailio/kamailio/issues/2849
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.kamailio.org/pipermail/sr-dev/attachments/20210910/088d7d06/attachment.htm>