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91c40a47b3
One can add a wl_global filter to a wl_display instance, which can be used to decide what clients should see what globals. This has so far been used to limit a Xwayland specific protocol extension to only Xwayland. In order to expand the logic about what globals are filtered to what clients, introduce a filter manager and port the Xwayland specific protocol filter to this new manager. Tests are added, using a new dummy protocol, to ensure that filtering is working as expected. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2810>
105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
/*
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* Copyright 2023 Red Hat
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#include "config.h"
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#include "meta-wayland-filter-manager.h"
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#include "meta-wayland.h"
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struct _MetaWaylandFilterManager
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{
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GHashTable *filters;
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};
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typedef struct _MetaWaylandFilter
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{
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MetaWaylandFilterFunc func;
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gpointer user_data;
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} MetaWaylandFilter;
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static bool
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global_filter_func (const struct wl_client *client,
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const struct wl_global *global,
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void *user_data)
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{
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MetaWaylandFilterManager *filter_manager = user_data;
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MetaWaylandFilter *filter;
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filter = g_hash_table_lookup (filter_manager->filters, global);
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if (!filter)
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return true;
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switch (filter->func (client, global, filter->user_data))
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{
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case META_WAYLAND_ACCESS_ALLOWED:
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return true;
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case META_WAYLAND_ACCESS_DENIED:
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return false;
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}
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g_assert_not_reached ();
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}
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MetaWaylandFilterManager *
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meta_wayland_filter_manager_new (MetaWaylandCompositor *compositor)
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{
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struct wl_display *wayland_display =
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meta_wayland_compositor_get_wayland_display (compositor);
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MetaWaylandFilterManager *filter_manager;
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filter_manager = g_new0 (MetaWaylandFilterManager, 1);
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filter_manager->filters = g_hash_table_new_full (NULL, NULL, NULL, g_free);
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wl_display_set_global_filter (wayland_display,
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global_filter_func, filter_manager);
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return filter_manager;
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}
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void
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meta_wayland_filter_manager_free (MetaWaylandFilterManager *filter_manager)
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{
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g_hash_table_unref (filter_manager->filters);
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g_free (filter_manager);
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}
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void
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meta_wayland_filter_manager_add_global (MetaWaylandFilterManager *filter_manager,
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struct wl_global *global,
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MetaWaylandFilterFunc filter_func,
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gpointer user_data)
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{
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MetaWaylandFilter *filter;
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g_return_if_fail (!g_hash_table_lookup (filter_manager->filters, global));
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filter = g_new0 (MetaWaylandFilter, 1);
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filter->func = filter_func;
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filter->user_data = user_data;
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g_hash_table_insert (filter_manager->filters, global, filter);
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}
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void
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meta_wayland_filter_manager_remove_global (MetaWaylandFilterManager *filter_manager,
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struct wl_global *global)
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{
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g_hash_table_remove (filter_manager->filters, global);
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}
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