bpo-27929: resolve names only for AF_INET/AF_INET6 with asyncio (GH-32131)

Co-authored-by: Andrew Svetlov <[email protected]>
(cherry picked from commit 5c30388)

Co-authored-by: Vincent Bernat <[email protected]>

Author: miss-islington

Lib/asyncio/selector_events.py

@@ -487,7 +487,8 @@ async def sock_connect(self, sock, address):
         if self._debug and sock.gettimeout() != 0:
             raise ValueError("the socket must be non-blocking")
 
-        if not hasattr(socket, 'AF_UNIX') or sock.family != socket.AF_UNIX:
+        if sock.family == socket.AF_INET or (
+                base_events._HAS_IPv6 and sock.family == socket.AF_INET6):
             resolved = await self._ensure_resolved(
                 address, family=sock.family, type=sock.type, proto=sock.proto,
                 loop=self,

Misc/NEWS.d/next/Library/2022-03-28-13-35-50.bpo-27929.j5mAmV.rst

@@ -0,0 +1,3 @@
+Fix :meth:`asyncio.loop.sock_connect` to only resolve names for :const:`socket.AF_INET` or
+:const:`socket.AF_INET6` families. Resolution may not make sense for other families,
+like :const:`socket.AF_BLUETOOTH` and :const:`socket.AF_UNIX`.