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Xnamespace: property access hook 

Filter property access. Right now just allowed inside same namespace,
or when caller is in root namespace.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
This commit is contained in:
Enrico Weigelt, metux IT consult 2025-03-19 10:50:56 +01:00
parent 21e890e5fc
commit 9c4b4e54d1
4 changed files with 50 additions and 0 deletions
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47
Xext/namespace/hook-property.c Normal file
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@ -0,0 +1,47 @@
#define HOOK_NAME "property"
#include <dix-config.h>
#include <stdio.h>
#include "dix/dix_priv.h"
#include "dix/registry_priv.h"
#include "include/propertyst.h"
#include "Xext/xacestr.h"
#include "namespace.h"
#include "hooks.h"
static inline Bool winIsRoot(WindowPtr pWin) {
if (!pWin)
return FALSE;
if (pWin->drawable.pScreen->root == pWin)
return TRUE;
return FALSE;
}
void hookPropertyAccess(CallbackListPtr *pcbl, void *unused, void *calldata)
{
XNS_HOOK_HEAD(XacePropertyAccessRec);
struct XnamespaceClientPriv *obj = XnsClientPriv(dixClientForWindow(param->pWin));
ATOM name = (*param->ppProp)->propertyName;
if (XnsClientSameNS(subj, obj))
return;
if (param->pWin == subj->ns->rootWindow)
return;
if (winIsRoot(param->pWin)) {
XNS_HOOK_LOG("window is the screen's root window\n");
} else {
XNS_HOOK_LOG("not a root window\n");
}
XNS_HOOK_LOG("access to property %s (atom 0x%x) window 0x%lx of client %d\n",
NameForAtom(name),
name,
(unsigned long)param->pWin->drawable.id,
dixClientForWindow(param->pWin)->index);
}

1
Xext/namespace/hooks.h
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@ -30,6 +30,7 @@ void hookDevice(CallbackListPtr *pcbl, void *unused, void *calldata);
void hookExtAccess(CallbackListPtr *pcbl, void *unused, void *calldata);
void hookExtDispatch(CallbackListPtr *pcbl, void *unused, void *calldata);
void hookInitRootWindow(CallbackListPtr *pcbl, void *unused, void *calldata);
void hookPropertyAccess(CallbackListPtr *pcbl, void *unused, void *calldata);
void hookReceive(CallbackListPtr *pcbl, void *unused, void *calldata);
void hookResourceAccess(CallbackListPtr *pcbl, void *unused, void *calldata);
void hookSelectionFilter(CallbackListPtr *pcbl, void *unused, void *calldata);

1
Xext/namespace/meson.build
View File

@ -8,6 +8,7 @@ libxserver_namespace = static_library(
'hook-ext-access.c',
'hook-ext-dispatch.c',
'hook-init-rootwindow.c',
'hook-property.c',
'hook-receive.c',
'hook-resource.c',
'hook-selection.c',

1
Xext/namespace/namespace.c
View File

@ -38,6 +38,7 @@ NamespaceExtensionInit(void)
XaceRegisterCallback(XACE_DEVICE_ACCESS, hookDevice, NULL) &&
XaceRegisterCallback(XACE_EXT_DISPATCH, hookExtDispatch, NULL) &&
XaceRegisterCallback(XACE_EXT_ACCESS, hookExtAccess, NULL) &&
XaceRegisterCallback(XACE_PROPERTY_ACCESS, hookPropertyAccess, NULL) &&
XaceRegisterCallback(XACE_RECEIVE_ACCESS, hookReceive, NULL) &&
XaceRegisterCallback(XACE_RESOURCE_ACCESS, hookResourceAccess, NULL) &&
XaceRegisterCallback(XACE_SEND_ACCESS, hookSend, NULL) &&