slirp: open-code qemu_socket_(un)select()

We are about to make the QEMU socket API use file-descriptor space only,
but libslirp gives us SOCKET as fd, still.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Message-Id: <20230221124802.4103554-14-marcandre.lureau@redhat.com>

net/slirp.c

@@ -251,16 +251,20 @@ static void net_slirp_register_poll_fd(int fd, void *opaque)
 #ifdef WIN32
     AioContext *ctxt = qemu_get_aio_context();
 
-    qemu_socket_select(fd, event_notifier_get_handle(&ctxt->notifier),
+    if (WSAEventSelect(fd, event_notifier_get_handle(&ctxt->notifier),
                        FD_READ | FD_ACCEPT | FD_CLOSE |
-                       FD_CONNECT | FD_WRITE | FD_OOB, NULL);
+                       FD_CONNECT | FD_WRITE | FD_OOB) != 0) {
+        error_setg_win32(&error_warn, WSAGetLastError(), "failed to WSAEventSelect()");
+    }
 #endif
 }
 
 static void net_slirp_unregister_poll_fd(int fd, void *opaque)
 {
 #ifdef WIN32
-    qemu_socket_unselect(fd, NULL);
+    if (WSAEventSelect(fd, NULL, 0) != 0) {
+        error_setg_win32(&error_warn, WSAGetLastError(), "failed to WSAEventSelect()");
+    }
 #endif
 }