xace.h revision 1b5d61b8 
1/************************************************************
2
3Author: Eamon Walsh <ewalsh@tycho.nsa.gov>
4
5Permission to use, copy, modify, distribute, and sell this software and its
6documentation for any purpose is hereby granted without fee, provided that
7this permission notice appear in supporting documentation.  This permission
8notice shall be included in all copies or substantial portions of the
9Software.
10
11THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
12IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
14AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
15AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
16CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
17
18********************************************************/
19
20#ifndef _XACE_H
21#define _XACE_H
22
23#ifdef XACE
24
25#define XACE_MAJOR_VERSION		2
26#define XACE_MINOR_VERSION		0
27
28#include "pixmap.h"
29#include "region.h"
30#include "window.h"
31#include "property.h"
32#include "selection.h"
33
34/* Default window background */
35#define XaceBackgroundNoneState(w) ((w)->forcedBG ? BackgroundPixel : None)
36
37/* security hooks */
38/* Constants used to identify the available security hooks
39 */
40#define XACE_CORE_DISPATCH		0
41#define XACE_EXT_DISPATCH		1
42#define XACE_RESOURCE_ACCESS		2
43#define XACE_DEVICE_ACCESS		3
44#define XACE_PROPERTY_ACCESS		4
45#define XACE_SEND_ACCESS		5
46#define XACE_RECEIVE_ACCESS		6
47#define XACE_CLIENT_ACCESS		7
48#define XACE_EXT_ACCESS			8
49#define XACE_SERVER_ACCESS		9
50#define XACE_SELECTION_ACCESS		10
51#define XACE_SCREEN_ACCESS		11
52#define XACE_SCREENSAVER_ACCESS		12
53#define XACE_AUTH_AVAIL			13
54#define XACE_KEY_AVAIL			14
55#define XACE_NUM_HOOKS			15
56
57extern _X_EXPORT CallbackListPtr XaceHooks[XACE_NUM_HOOKS];
58
59/* Entry point for hook functions.  Called by Xserver.
60 * Required by libdbe and libextmod
61 */
62extern _X_EXPORT int XaceHook(int /*hook */ ,
63                              ...       /*appropriate args for hook */
64    );
65
66/* determine whether any callbacks are present for the XACE hook */
67extern _X_EXPORT int XaceHookIsSet(int hook);
68
69/* Special-cased hook functions
70 */
71extern _X_EXPORT int XaceHookDispatch(ClientPtr ptr, int major);
72#define XaceHookDispatch(c, m) \
73    ((XaceHooks[XACE_EXT_DISPATCH] && (m) >= EXTENSION_BASE) ? \
74    XaceHookDispatch((c), (m)) : \
75    Success)
76
77extern _X_EXPORT int XaceHookPropertyAccess(ClientPtr ptr, WindowPtr pWin,
78                                            PropertyPtr *ppProp,
79                                            Mask access_mode);
80extern _X_EXPORT int XaceHookSelectionAccess(ClientPtr ptr, Selection ** ppSel,
81                                             Mask access_mode);
82
83/* Register a callback for a given hook.
84 */
85#define XaceRegisterCallback(hook,callback,data) \
86    AddCallback(XaceHooks+(hook), callback, data)
87
88/* Unregister an existing callback for a given hook.
89 */
90#define XaceDeleteCallback(hook,callback,data) \
91    DeleteCallback(XaceHooks+(hook), callback, data)
92
93/* XTrans wrappers for use by security modules
94 */
95extern _X_EXPORT int XaceGetConnectionNumber(ClientPtr ptr);
96extern _X_EXPORT int XaceIsLocal(ClientPtr ptr);
97
98/* From the original Security extension...
99 */
100
101extern _X_EXPORT void XaceCensorImage(ClientPtr client,
102                                      RegionPtr pVisibleRegion,
103                                      long widthBytesLine,
104                                      DrawablePtr pDraw,
105                                      int x, int y, int w, int h,
106                                      unsigned int format, char *pBuf);
107
108#else                           /* XACE */
109
110/* Default window background */
111#define XaceBackgroundNoneState(w)		None
112
113/* Define calls away when XACE is not being built. */
114
115#ifdef __GNUC__
116#define XaceHook(args...) Success
117#define XaceHookIsSet(args...) 0
118#define XaceHookDispatch(args...) Success
119#define XaceHookPropertyAccess(args...) Success
120#define XaceHookSelectionAccess(args...) Success
121#define XaceCensorImage(args...) { ; }
122#else
123#define XaceHook(...) Success
124#define XaceHookIsSet(...) 0
125#define XaceHookDispatch(...) Success
126#define XaceHookPropertyAccess(...) Success
127#define XaceHookSelectionAccess(...) Success
128#define XaceCensorImage(...) { ; }
129#endif
130
131#endif                          /* XACE */
132
133#endif                          /* _XACE_H */
134