#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <stdarg.h>
#include "windowstr.h"
#include "scrnintstr.h"
#include "gcstruct.h"
#include "xacestr.h"
#include "modinit.h"
CallbackListPtr XaceHooks[XACE_NUM_HOOKS] = {0};
static int (*UntrustedProcVector[256])(
ClientPtr
);
static int (*SwappedUntrustedProcVector[256])(
ClientPtr
);
int XaceHook(int hook, ...)
{
pointer calldata;
int *prv = NULL;
va_list ap;
va_start(ap, hook);
switch (hook)
{
case XACE_CORE_DISPATCH: {
XaceCoreDispatchRec rec = {
va_arg(ap, ClientPtr),
TRUE
};
calldata = &rec;
prv = &rec.rval;
break;
}
case XACE_RESOURCE_ACCESS: {
XaceResourceAccessRec rec = {
va_arg(ap, ClientPtr),
va_arg(ap, XID),
va_arg(ap, RESTYPE),
va_arg(ap, Mask),
va_arg(ap, pointer),
TRUE
};
calldata = &rec;
prv = &rec.rval;
break;
}
case XACE_DEVICE_ACCESS: {
XaceDeviceAccessRec rec = {
va_arg(ap, ClientPtr),
va_arg(ap, DeviceIntPtr),
va_arg(ap, Bool),
TRUE
};
calldata = &rec;
prv = &rec.rval;
break;
}
case XACE_PROPERTY_ACCESS: {
XacePropertyAccessRec rec = {
va_arg(ap, ClientPtr),
va_arg(ap, WindowPtr),
va_arg(ap, Atom),
va_arg(ap, Mask),
XaceAllowOperation
};
calldata = &rec;
prv = &rec.rval;
break;
}
case XACE_DRAWABLE_ACCESS: {
XaceDrawableAccessRec rec = {
va_arg(ap, ClientPtr),
va_arg(ap, DrawablePtr),
TRUE
};
calldata = &rec;
prv = &rec.rval;
break;
}
case XACE_MAP_ACCESS:
case XACE_BACKGRND_ACCESS: {
XaceMapAccessRec rec = {
va_arg(ap, ClientPtr),
va_arg(ap, WindowPtr),
TRUE
};
calldata = &rec;
prv = &rec.rval;
break;
}
case XACE_EXT_DISPATCH:
case XACE_EXT_ACCESS: {
XaceExtAccessRec rec = {
va_arg(ap, ClientPtr),
va_arg(ap, ExtensionEntry*),
TRUE
};
calldata = &rec;
prv = &rec.rval;
break;
}
case XACE_HOSTLIST_ACCESS: {
XaceHostlistAccessRec rec = {
va_arg(ap, ClientPtr),
va_arg(ap, Mask),
TRUE
};
calldata = &rec;
prv = &rec.rval;
break;
}
case XACE_SITE_POLICY: {
XaceSitePolicyRec rec = {
va_arg(ap, char*),
va_arg(ap, int),
FALSE
};
calldata = &rec;
prv = &rec.rval;
break;
}
case XACE_DECLARE_EXT_SECURE: {
XaceDeclareExtSecureRec rec = {
va_arg(ap, ExtensionEntry*),
va_arg(ap, Bool)
};
calldata = &rec;
break;
}
case XACE_AUTH_AVAIL: {
XaceAuthAvailRec rec = {
va_arg(ap, ClientPtr),
va_arg(ap, XID)
};
calldata = &rec;
break;
}
case XACE_KEY_AVAIL: {
XaceKeyAvailRec rec = {
va_arg(ap, xEventPtr),
va_arg(ap, DeviceIntPtr),
va_arg(ap, int)
};
calldata = &rec;
break;
}
case XACE_WINDOW_INIT: {
XaceWindowRec rec = {
va_arg(ap, ClientPtr),
va_arg(ap, WindowPtr)
};
calldata = &rec;
break;
}
case XACE_AUDIT_BEGIN: {
XaceAuditRec rec = {
va_arg(ap, ClientPtr),
0
};
calldata = &rec;
break;
}
case XACE_AUDIT_END: {
XaceAuditRec rec = {
va_arg(ap, ClientPtr),
va_arg(ap, int)
};
calldata = &rec;
break;
}
default: {
va_end(ap);
return 0;
}
}
va_end(ap);
CallCallbacks(&XaceHooks[hook], calldata);
return prv ? *prv : 0;
}
static int
ProcXaceDispatch(ClientPtr client)
{
REQUEST(xReq);
switch (stuff->data)
{
default:
return BadRequest;
}
}
static int
SProcXaceDispatch(ClientPtr client)
{
REQUEST(xReq);
switch (stuff->data)
{
default:
return BadRequest;
}
}
static void
XaceResetProc(ExtensionEntry *extEntry)
{
int i;
for (i=0; i<XACE_NUM_HOOKS; i++)
{
DeleteCallbackList(&XaceHooks[i]);
XaceHooks[i] = NULL;
}
}
static int
XaceCatchDispatchProc(ClientPtr client)
{
REQUEST(xReq);
int major = stuff->reqType;
if (!ProcVector[major])
return (BadRequest);
if (!XaceHook(XACE_CORE_DISPATCH, client))
return (BadAccess);
return client->swapped ?
(* SwappedProcVector[major])(client) :
(* ProcVector[major])(client);
}
static int
XaceCatchExtProc(ClientPtr client)
{
REQUEST(xReq);
int major = stuff->reqType;
ExtensionEntry *ext = GetExtensionEntry(major);
if (!ext || !ProcVector[major])
return (BadRequest);
if (!XaceHook(XACE_EXT_DISPATCH, client, ext))
return (BadRequest);
return client->swapped ?
(* SwappedProcVector[major])(client) :
(* ProcVector[major])(client);
}
static void
XaceClientStateCallback(
CallbackListPtr *pcbl,
pointer nulldata,
pointer calldata)
{
NewClientInfoRec *pci = (NewClientInfoRec *)calldata;
ClientPtr client = pci->client;
switch (client->clientState)
{
case ClientStateRunning:
{
client->requestVector = client->swapped ?
SwappedUntrustedProcVector : UntrustedProcVector;
break;
}
default: break;
}
}
void XaceExtensionInit(INITARGS)
{
ExtensionEntry *extEntry;
int i;
if (!AddCallback(&ClientStateCallback, XaceClientStateCallback, NULL))
return;
extEntry = AddExtension(XACE_EXTENSION_NAME,
XaceNumberEvents, XaceNumberErrors,
ProcXaceDispatch, SProcXaceDispatch,
XaceResetProc, StandardMinorOpcode);
for (i = 0; i < 128; i++)
{
UntrustedProcVector[i] = XaceCatchDispatchProc;
SwappedUntrustedProcVector[i] = XaceCatchDispatchProc;
}
for (i = 128; i < 256; i++)
{
UntrustedProcVector[i] = XaceCatchExtProc;
SwappedUntrustedProcVector[i] = XaceCatchExtProc;
}
}
void
XaceCensorImage(client, pVisibleRegion, widthBytesLine, pDraw, x, y, w, h,
format, pBuf)
ClientPtr client;
RegionPtr pVisibleRegion;
long widthBytesLine;
DrawablePtr pDraw;
int x, y, w, h;
unsigned int format;
char * pBuf;
{
ScreenPtr pScreen;
RegionRec imageRegion;
RegionRec censorRegion;
BoxRec imageBox;
int nRects;
pScreen = pDraw->pScreen;
imageBox.x1 = x;
imageBox.y1 = y;
imageBox.x2 = x + w;
imageBox.y2 = y + h;
REGION_INIT(pScreen, &imageRegion, &imageBox, 1);
REGION_NULL(pScreen, &censorRegion);
REGION_SUBTRACT(pScreen, &censorRegion, &imageRegion, pVisibleRegion);
nRects = REGION_NUM_RECTS(&censorRegion);
if (nRects > 0)
{
GCPtr pScratchGC = NULL;
PixmapPtr pPix = NULL;
xRectangle *pRects = NULL;
Bool failed = FALSE;
int depth = 1;
int bitsPerPixel = 1;
int i;
BoxPtr pBox;
pRects = (xRectangle *)ALLOCATE_LOCAL(nRects * sizeof(xRectangle *));
if (!pRects)
{
failed = TRUE;
goto failSafe;
}
for (pBox = REGION_RECTS(&censorRegion), i = 0;
i < nRects;
i++, pBox++)
{
pRects[i].x = pBox->x1;
pRects[i].y = pBox->y1 - imageBox.y1;
pRects[i].width = pBox->x2 - pBox->x1;
pRects[i].height = pBox->y2 - pBox->y1;
}
if (format == ZPixmap)
{
depth = pDraw->depth;
bitsPerPixel = pDraw->bitsPerPixel;
}
pPix = GetScratchPixmapHeader(pDraw->pScreen, w, h,
depth, bitsPerPixel,
widthBytesLine, (pointer)pBuf);
if (!pPix)
{
failed = TRUE;
goto failSafe;
}
pScratchGC = GetScratchGC(depth, pPix->drawable.pScreen);
if (!pScratchGC)
{
failed = TRUE;
goto failSafe;
}
ValidateGC(&pPix->drawable, pScratchGC);
(* pScratchGC->ops->PolyFillRect)(&pPix->drawable,
pScratchGC, nRects, pRects);
failSafe:
if (failed)
{
bzero(pBuf, (int)(widthBytesLine * h));
}
if (pRects) DEALLOCATE_LOCAL(pRects);
if (pScratchGC) FreeScratchGC(pScratchGC);
if (pPix) FreeScratchPixmapHeader(pPix);
}
REGION_UNINIT(pScreen, &imageRegion);
REGION_UNINIT(pScreen, &censorRegion);
}