Get ecal status in python

[ENAC-Robotique]

Hello, I'm using the ecal python bridge and I wonder how can I get the ecal status?

I am using ecal with network enabled and I have to set a multicast route for ecal to work, and since my program starts before the route is set (its a linux service), it can't connect at first.
I want to test the status and quit the program is it's not Ok.

Ecal prints CUDPSender::Send failed with: 'Network is unreachable' in the terminal but I don't know what function to call to get this status ?

I suspect that eCAL::Time::GetStatus is the function I want, but there seems to be no python binding for this function.

NB: ecal.core.core.ok() returns 1 so it doesn't help for this case.

[KerstinKeller]

Maybe @rex-schilasky can answer this better.
In general, with ecal.core.core.ok() you can check if the initialization was ok. But this checks only internal initialization, and I do not think that this checks if routes are set correctly (after all, at least in local mode, this is not a requirement). So I don't think that there is a way to check with eCAL if your system is configured correctly.
It could be interesting, to add checks like this.

[rex-schilasky]

Yes, unfortunately ecal.core.core.ok() will not reflect the status of the eCAL network layer connection. I can imaging that you could use another system function to check if the network routes are set or not. Maybe you can utilize an python os.system call and parse its output ?

[ENAC-Robotique]

Since ecal is printing some errors I though it would be more reliable than reading system config, that could be erroneous.
I will try doing a test in C++ to test if the GetStatus function can help with it.

[ENAC-Robotique]

I can confirm eCAL::Time::GetStatus is not want I want :smile: (I printed the error code ans status message)

CUDPReceiverAsio: Unable to join multicast group: No such device
CUDPSender::Send failed with: 'Network is unreachable'
CUDPReceiverAsio: Unable to join multicast group: No such device
0   everything is fine.
0   everything is fine.
CUDPSender::Send failed with: 'Network is unreachable'
CUDPSender::Send failed with: 'Network is unreachable'
0   everything is fine.
0   everything is fine.

[ENAC-Robotique]

I tracked down the message to the AddMultiCastGroup method, and I see that the return value is not used. Maybe it could be a good idea to use this return value?

ecal/ecal/core/src/io/udp_receiver_asio.cpp

Lines 100 to 103 in 534bc59

	AddMultiCastGroup(attr_.ipaddr.c_str());
	// state successful creation
	m_created = true;

[rex-schilasky]

We will check this. Thank you for your effort.