Also check sockets bind to tcp6 and fail on all closed sockets

[juanjux]

• Also parse /proc/net/tcp6 because go will bind to it (too) on Listen() if TCP v6 is enabled on the system, and then the socket will only show on /proc/net/tcp6. This fixes Failing test for connection handler in Linux #821.

• Fail on all kinds of closed sockets, even if they were closed correctly, before the query completion, thus ensuring that the query is cancelled.

• Two explicit channel closings to ensure the goroutines exit ASAP.

[agarciamontoro]

It was a tricky one... Good that you found the cause! 🎉

[erizocosmico]

@juanjux remember to sign de DCO

[juanjux]

@erizocosmico yep, that's what happen when you commit code from VMs or other people machines without all your git/gpg config scaffolding :/

[TheWinds]

On linux system,if TCP v6 is disabled on the system, open /proc/net/tcp6 will produce the error /proc/net/tcp6: No such file or directory.
How to slove this bug？

func tcpSocks(accept AcceptFn) ([]sockTabEntry, error) {
	paths := [2]string{pathTCP4Tab, pathTCP6Tab}
	var allTabs []sockTabEntry
	for _, p := range paths {
		f, err := os.Open(p)
		defer func() {
			_ = f.Close()
		}()
		if err != nil {
			return nil, err
		}

		t, err := parseSocktab(f, accept)
		if err != nil {
			return nil, err
		}
		allTabs = append(allTabs, t...)

	}
	extractProcInfo(allTabs)
	return allTabs, nil
}

[erizocosmico]

@TheWinds this project is no longer maintained, you can report this on it's new home: https://github.com/dolthub/go-mysql-server