gh-114887 Reject only sockets of type SOCK_STREAM in create_datagram_endpoint() (#114893)

Also improve exception message.

Co-authored-by: Donghee Na <[email protected]>

Author: tjhowse

Lib/asyncio/base_events.py

@@ -1340,9 +1340,9 @@ async def create_datagram_endpoint(self, protocol_factory,
                                        allow_broadcast=None, sock=None):
         """Create datagram connection."""
         if sock is not None:
-            if sock.type != socket.SOCK_DGRAM:
+            if sock.type == socket.SOCK_STREAM:
                 raise ValueError(
-                    f'A UDP Socket was expected, got {sock!r}')
+                    f'A datagram socket was expected, got {sock!r}')
             if (local_addr or remote_addr or
                     family or proto or flags or
                     reuse_port or allow_broadcast):

Lib/test/test_asyncio/test_base_events.py

@@ -1232,7 +1232,7 @@ def test_create_datagram_endpoint_wrong_sock(self):
         with sock:
             coro = self.loop.create_datagram_endpoint(MyProto, sock=sock)
             with self.assertRaisesRegex(ValueError,
-                                        'A UDP Socket was expected'):
+                                        'A datagram socket was expected'):
                 self.loop.run_until_complete(coro)
 
     def test_create_connection_no_host_port_sock(self):

Misc/NEWS.d/next/Core and Builtins/2024-02-03-04-07-18.gh-issue-114887.uLSFmN.rst

@@ -0,0 +1,2 @@
+Changed socket type validation in :meth:`~asyncio.loop.create_datagram_endpoint` to accept all non-stream sockets.
+This fixes a regression in compatibility with raw sockets.