UDP driver errno 22: Invalid Argument

[zimri-leisher]

F´ Version	3.5.1
Affected Component	Udp

---

Problem Description

When trying to send to a UDP port with the Udp component, we are seeing errno 22 raised (invalid argument)

The driver is being configured like so:

instance x: Drv.Udp base id 0x1234 {
    phase Fpp.ToCpp.Phases.configComponents """
    x.configureSend(ip_c_str, port_int, 0, UDP_TIMEOUT_US);
    x.open();
    """

    phase Fpp.ToCpp.Phases.tearDownComponents """
    x.stop();
    x.join();
    """
}

From internal testing, we have validated that the data we are passing to the send port is a valid... Unsure what could be causing this.

Context / Environment

Execute fprime-util version-check and share the output.

Operating System: Linux
CPU Architecture: x86_64
Platform: Linux-5.15.133.1-microsoft-standard-WSL2-x86_64-with-glibc2.35
Python version: 3.10.12
CMake version: 3.22.1
Pip version: 22.0.2
Pip packages:
    fprime-tools==3.5.1
    fprime-gds==3.5.1
    fprime-fpp-*==2.2.1
Project submodules:

[LeStarch]

@zimri-leisher I did find a bug with UDP. It would not work in send only mode because of an unguarded call to bind. I've corrected this.

I was not able to reproduce your exact error, but I also was relying on auto-connect, not an explicit call to open.

You did catch another critical detail, which is that configureSend must be called in the configure phase, not in the thread start phase. Good catch!

[zimri-leisher]

Awesome, that seems like it could be the fix. The exact error I had could be OS specific.
Glad I was able to catch that!