[3.13] gh-129719: Restore missing socket.CAN_RAW_ERR_FILTER on Linux (GH-129721) (#132702)

gh-129719: Restore missing `socket.CAN_RAW_ERR_FILTER` on Linux (GH-129721)
(cherry picked from commit ce31ae5)

Co-authored-by: Jeroen Bogers <[email protected]>
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Peter Bierma <[email protected]>

Author: 4 people

Doc/library/socket.rst

@@ -470,6 +470,9 @@ Constants
    .. versionchanged:: 3.11
       NetBSD support was added.
 
+   .. versionchanged:: next
+      Restored missing ``CAN_RAW_ERR_FILTER`` on Linux.
+
 .. data:: CAN_BCM
           CAN_BCM_*
 

Misc/NEWS.d/next/Library/2025-02-06-11-23-51.gh-issue-129719.Of6rvb.rst

@@ -0,0 +1 @@
+Fix missing :data:`!socket.CAN_RAW_ERR_FILTER` constant in the socket module on Linux systems. It was missing since Python 3.11.

Modules/socketmodule.c

@@ -8157,7 +8157,7 @@ socket_exec(PyObject *m)
 #endif
 #if defined(HAVE_LINUX_CAN_RAW_H) || defined(HAVE_NETCAN_CAN_H)
     ADD_INT_MACRO(m, CAN_RAW_FILTER);
-#ifdef CAN_RAW_ERR_FILTER
+#ifdef HAVE_LINUX_CAN_RAW_H
     ADD_INT_MACRO(m, CAN_RAW_ERR_FILTER);
 #endif
     ADD_INT_MACRO(m, CAN_RAW_LOOPBACK);