About adding tcping

**Describe your feature request**:
First of all, thank you all for contributing to the open source software, which works very well.
But I found that we often need to tcping during the process, I have been looking for software that can realize this function. networkManager makes me see the hope, so can you add a tcping function that?
I think this would be a very useful feature.
Thanks again for contributing to open source software!

The request names no file, entry point, test, or acceptance criteria. Start by locating the existing NetworkManager ping-related functionality and clarify the expected tcping behavior, interface, and completion criteria with maintainers before estimating the work.

Written by the indexing model from the issue text.