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https://gitlab.freedesktop.org/pipewire/wireplumber.git
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15f5f96693
The only secure and robust way to check that a userdata is of the expected type is to check its metatable. Userdata metatables are not changeable by Lua code without the debug library, so if the metatable is a certain table, only C code could have made it so. GLib type checking functions are _not_ a robust or secure way to check that a block of memory is a specific type of GObject, because Lua code could cause a type confusion bug and potentially use it to forge pointers.
41 lines
1 KiB
C
41 lines
1 KiB
C
/* WirePlumber
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*
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* Copyright © 2020 Collabora Ltd.
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* @author George Kiagiadakis <george.kiagiadakis@collabora.com>
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*
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* SPDX-License-Identifier: MIT
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*/
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#ifndef __WPLUA_PRIVATE_H__
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#define __WPLUA_PRIVATE_H__
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#include "wplua.h"
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G_BEGIN_DECLS
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#define WP_LOCAL_LOG_TOPIC log_topic_wplua
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WP_LOG_TOPIC_EXTERN (log_topic_wplua)
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/* boxed.c */
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void _wplua_init_gboxed (lua_State *L);
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/* closure.c */
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void _wplua_init_closure (lua_State *L);
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/* object.c */
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void _wplua_init_gobject (lua_State *L);
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/* userdata.c */
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GValue * _wplua_pushgvalue_userdata (lua_State * L, GType type);
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GValue * _wplua_togvalue_userdata_named (lua_State *L, int idx, GType type, const char *table_name);
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GValue * _wplua_togvalue_userdata (lua_State *L, int idx, GType type);
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gboolean _wplua_isgvalue_userdata (lua_State *L, int idx, GType type);
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int _wplua_gvalue_userdata___eq_impl (lua_State *L, const char *type);
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int _wplua_gvalue_userdata___gc (lua_State *L);
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/* wplua.c */
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int _wplua_pcall (lua_State *L, int nargs, int nret);
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G_END_DECLS
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#endif
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