Control message request over UDP(unicast/multicast) not working

[tejaswinijoshi89]

I am connecting dltviewer (tried with v2.26.0, v2.27.0, v2.18.0) with dltdaemon (https://github.com/COVESA/dlt-daemon/tree/master) over UDP. I am able to receive log messages from dltdaemon over both UDP unicast and multicast interface. But when I try to send control message from dltviewer (GetLogInfo,GetDefaultLoginfo,etc) i get error as "ECU Not Connected ". I even checked on wireshark. UDP signal transmission traces from dltviewer to dltdaemon over UDP are not present.
Does dltviewer supports control message request over UDP. If so then how to enable it.

[vifactor]

I tried to have a look to this issue and cannot even configure dlt-daemon to be able to receive dlt logs via UDP in dlt-viewer. I run daemon with src/daemon/dlt-daemon -c custom_dlt.conf, where the conf file contains a single entry: UDPConnectionSetup = 1. On dlt-viewer side I connect with:

The connection to ECU does not happen (connection icon is yellow, not green). If I switch to TCP, I can connect and see some technical logs. what do I miss for UDP?

[alexmucde]

Sending control messages is only supported for TCP connections. Sending UDP messages to ECUs is not allowed in our cars. I do not know how other OEMs are handling this.

[alexmucde]

DLT Daemon also does not support this, because of the same reason.