[3.9] gh-119461: Fix ThreadedVSOCKSocketStreamTest (GH-129171) (GH-129440)

[miss-islington]

• [3.11] test_socket: testStream() fails on Fedora Rawhide #119461: Fix ThreadedVSOCKSocketStreamTest ([3.11] gh-119461: Fix ThreadedVSOCKSocketStreamTest #129171)

Fix ThreadedVSOCKSocketStreamTest: if get_cid() returns the host
address or the "any" address, use the local communication address
(loopback): VMADDR_CID_LOCAL.

On Linux 6.9, apparently, the /dev/vsock device is now available but
get_cid() returns VMADDR_CID_ANY (-1).

(cherry picked from commit 45db419)

Co-authored-by: Victor Stinner vstinner@python.org
(cherry picked from commit e94dbe4)
(cherry picked from commit c750061)
(cherry picked from commit cbfe302)

• test_socket: testStream() fails on Fedora Rawhide #119461: Restore the testSocket VSOCK skipUnless removed by PR gh-119461: Fix ThreadedVSOCKSocketStreamTest #119465 (gh-119461: Restore the testSocket VSOCK skipUnless removed by PR #119465 #129561)

Restore the skipUnless removed by GH-119465.

This test can only pass on virtual machines, not actual machines.

actual machines see:

 self.cli.connect((cid, VSOCKPORT)) ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^ OSError: [Errno 19] No such device 

Reproduced on (Linux) Ubuntu 24.04.1 running 6.8.0-52-generic.

---

(cherry picked from commit 2bd9f9b)

Co-authored-by: Miss Islington (bot) 31488909+miss-islington@users.noreply.github.com
Co-authored-by: Victor Stinner vstinner@python.org
Co-authored-by: Gregory P. Smith greg@krypto.org

[encukou]

!buildbot PPC64LE.Fedora.Stable.Refleaks

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @encukou for commit 4ac4704 🤖

The command will test the builders whose names match following regular expression: PPC64LE.Fedora.Stable.Refleaks

The builders matched are:

• PPC64LE Fedora Stable Refleaks PR

[encukou]

See #129509 for the RtD preview failure.