Hide xwayland_shell_v1 from regular clients

Regular clients are not allowed to use this interface. wlroots
already sends a protocol error if a non-Xwayland client tries to
use this interface, but let's remove all temptation by hiding it
completely.

1 files changed, 15 insertions, 0 deletions

diff --git a/sway/server.c b/sway/server.c
index 50f0a702..db873dca 100644
--- a/sway/server.c
+++ b/sway/server.c
@@ -49,6 +49,7 @@
 #include "sway/tree/root.h"
 
 #if HAVE_XWAYLAND
+#include <wlr/xwayland/shell.h>
 #include "sway/xwayland.h"
 #endif
 
@@ -73,11 +74,25 @@ static void handle_drm_lease_request(struct wl_listener *listener, void *data) {
 }
 #endif
 
+static bool filter_global(const struct wl_client *client,
+                const struct wl_global *global, void *data) {
+#if HAVE_XWAYLAND
+        struct wlr_xwayland *xwayland = server.xwayland.wlr_xwayland;
+        if (global == xwayland->shell_v1->global) {
+                return xwayland->server != NULL && client == xwayland->server->client;
+        }
+#endif
+
+        return true;
+}
+
 bool server_init(struct sway_server *server) {
         sway_log(SWAY_DEBUG, "Initializing Wayland server");
         server->wl_display = wl_display_create();
         server->wl_event_loop = wl_display_get_event_loop(server->wl_display);
 
+        wl_display_set_global_filter(server->wl_display, filter_global, NULL);
+
         server->backend = wlr_backend_autocreate(server->wl_display, &server->session);
         if (!server->backend) {
                 sway_log(SWAY_ERROR, "Unable to create backend");