gh-142991: socketmodule: fixed getsockaddrlen() for PF_DIVERT socket

[glebius]

This is my miss from #96534

• Issue: socketmodule: FreeBSD PF_DIVERT is missing in getsockaddrlen() #142991

[glebius]

Tag @vstinner who handled the initial submission of PF_DIVERT.

[vstinner]

The example from the issue still fails after applying this change:

vstinner@freebsd$ catraw.pyfromsocketimportsocket, PF_DIVERT, SOCK_RAWwithsocket(PF_DIVERT, SOCK_RAW, 0) asfd: r=fd.recvfrom(16384) vstinner@freebsd$ ./pythonraw.pyTraceback (mostrecentcalllast): File"/usr/home/vstinner/python/main/raw.py", line2, in<module>withsocket(PF_DIVERT, SOCK_RAW, 0) asfd: ~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^File"/usr/home/vstinner/python/main/Lib/socket.py", line237, in__init___socket.socket.__init__(self, family, type, proto, fileno) ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^OSError: [Errno47] Addressfamilynotsupportedbyprotocolfamily

[glebius]

The example from the issue still fails after applying this change:
OSError: [Errno 47] Address family not supported by protocol family

What FreeBSD version do you test on? The GENERIC kernel doesn't have divert module. Do you have ipdivert.ko loaded?

[vstinner]

What FreeBSD version do you test on? The GENERIC kernel doesn't have divert module. Do you have ipdivert.ko loaded?

I tested on:

vstinner@freebsd$ uname -a FreeBSD freebsd 14.2-RELEASE-p1 FreeBSD 14.2-RELEASE-p1 GENERIC amd64 

Ah! The example works if I load the kernel module with sudo kldload ipdivert.ko and run the example as root (sudo ./python raw.py).

[vstinner]

Without this change, the example fails with:

Traceback (mostrecentcalllast): File"/usr/home/vstinner/python/main/raw.py", line3, in<module>r=fd.recvfrom(16384) OSError: getsockaddrlen: badfamily

[miss-islington-app]

Thanks @glebius for the PR, and @vstinner for merging it 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14.
🐍🍒⛏🤖

[bedevere-app]

GH-143481 is a backport of this pull request to the 3.14 branch.

[bedevere-app]

GH-143482 is a backport of this pull request to the 3.13 branch.

[vstinner]

Merged, thanks. I backported the fix to 3.13 and 3.14 branches.

[glebius]

Thanks, Victor!

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 FreeBSD14 3.13 (tier-3) has failed when building commit 7f93669.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1481/builds/1800) and take a look at the build logs.
4. Check if the failure is related to this commit (7f93669) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/1481/builds/1800

Summary of the results of the build (if available):

Click to see traceback logs

remote: Enumerating objects: 14, done. remote: Counting objects: 12% (1/8) remote: Counting objects: 25% (2/8) remote: Counting objects: 37% (3/8) remote: Counting objects: 50% (4/8) remote: Counting objects: 62% (5/8) remote: Counting objects: 75% (6/8) remote: Counting objects: 87% (7/8) remote: Counting objects: 100% (8/8) remote: Counting objects: 100% (8/8), done. remote: Compressing objects: 12% (1/8) remote: Compressing objects: 25% (2/8) remote: Compressing objects: 37% (3/8) remote: Compressing objects: 50% (4/8) remote: Compressing objects: 62% (5/8) remote: Compressing objects: 75% (6/8) remote: Compressing objects: 87% (7/8) remote: Compressing objects: 100% (8/8) remote: Compressing objects: 100% (8/8), done. remote: Total 14 (delta 1), reused 2 (delta 0), pack-reused 6 (from 2)  From https://github.com/python/cpython * branch 3.13 -> FETCH_HEAD Note: switching to '7f936694dbc0dc0dbb07d98fa668776c4e4ca595'. You are in 'detached HEAD' state. You can look around, make experimental changes and commit them, and you can discard any commits you make in this state without impacting any branches by switching back to a branch. If you want to create a new branch to retain commits you create, you may do so (now or later) by using -c with the switch command. Example: git switch -c <new-branch-name> Or undo this operation with: git switch - Turn off this advice by setting config variable advice.detachedHead to false HEAD is now at 7f936694dbc [3.13] gh-142991: socketmodule: fixed getsockaddrlen() for PF_DIVERT socket (GH-142993) (#143482) Switched to and reset branch '3.13' 1 error

[vstinner]

Oops, the 3.13 backport broke the build on FreeBSD. I wrote #143514 to fix it.