R6.6 is the Xorg base-line
This commit is contained in:
Kaleb Keithley
470
dix/extension.c
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470
dix/extension.c
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/***********************************************************
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Copyright 1987, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of Digital not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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******************************************************************/
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/* $Xorg: extension.c,v 1.4 2001/02/09 02:04:40 xorgcvs Exp $ */
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#include "X.h"
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#define NEED_REPLIES
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#include "Xproto.h"
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#include "misc.h"
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#include "dixstruct.h"
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#include "extnsionst.h"
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#include "gcstruct.h"
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#include "scrnintstr.h"
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#ifdef XCSECURITY
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#define _SECURITY_SERVER
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#include "extensions/security.h"
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#endif
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#define EXTENSION_BASE 128
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#define EXTENSION_EVENT_BASE 64
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#define LAST_EVENT 128
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#define LAST_ERROR 255
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ScreenProcEntry AuxillaryScreenProcs[MAXSCREENS];
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static ExtensionEntry **extensions = (ExtensionEntry **)NULL;
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int lastEvent = EXTENSION_EVENT_BASE;
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static int lastError = FirstExtensionError;
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static unsigned int NumExtensions = 0;
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ExtensionEntry *AddExtension(name, NumEvents, NumErrors, MainProc,
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SwappedMainProc, CloseDownProc, MinorOpcodeProc)
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char *name;
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int NumEvents;
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int NumErrors;
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int (* MainProc)();
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int (* SwappedMainProc)();
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void (* CloseDownProc)();
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unsigned short (* MinorOpcodeProc)();
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{
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int i;
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register ExtensionEntry *ext, **newexts;
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if (!MainProc || !SwappedMainProc || !CloseDownProc || !MinorOpcodeProc)
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return((ExtensionEntry *) NULL);
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if ((lastEvent + NumEvents > LAST_EVENT) ||
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(unsigned)(lastError + NumErrors > LAST_ERROR))
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return((ExtensionEntry *) NULL);
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ext = (ExtensionEntry *) xalloc(sizeof(ExtensionEntry));
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if (!ext)
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return((ExtensionEntry *) NULL);
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ext->name = (char *)xalloc(strlen(name) + 1);
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ext->num_aliases = 0;
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ext->aliases = (char **)NULL;
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if (!ext->name)
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{
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xfree(ext);
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return((ExtensionEntry *) NULL);
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}
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strcpy(ext->name, name);
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i = NumExtensions;
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newexts = (ExtensionEntry **) xrealloc(extensions,
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(i + 1) * sizeof(ExtensionEntry *));
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if (!newexts)
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{
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xfree(ext->name);
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xfree(ext);
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return((ExtensionEntry *) NULL);
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}
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NumExtensions++;
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extensions = newexts;
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extensions[i] = ext;
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ext->index = i;
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ext->base = i + EXTENSION_BASE;
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ext->CloseDown = CloseDownProc;
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ext->MinorOpcode = MinorOpcodeProc;
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ProcVector[i + EXTENSION_BASE] = MainProc;
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SwappedProcVector[i + EXTENSION_BASE] = SwappedMainProc;
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if (NumEvents)
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{
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ext->eventBase = lastEvent;
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ext->eventLast = lastEvent + NumEvents;
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lastEvent += NumEvents;
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}
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else
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{
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ext->eventBase = 0;
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ext->eventLast = 0;
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}
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if (NumErrors)
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{
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ext->errorBase = lastError;
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ext->errorLast = lastError + NumErrors;
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lastError += NumErrors;
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}
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else
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{
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ext->errorBase = 0;
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ext->errorLast = 0;
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}
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#ifdef XCSECURITY
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ext->secure = FALSE;
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#endif
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#ifdef LBX
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(void) LbxAddExtension(name, ext->base, ext->eventBase, ext->errorBase);
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#endif
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return(ext);
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}
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Bool AddExtensionAlias(alias, ext)
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char *alias;
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ExtensionEntry *ext;
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{
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char *name;
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char **aliases;
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aliases = (char **)xrealloc(ext->aliases,
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(ext->num_aliases + 1) * sizeof(char *));
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if (!aliases)
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return FALSE;
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ext->aliases = aliases;
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name = (char *)xalloc(strlen(alias) + 1);
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if (!name)
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return FALSE;
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strcpy(name, alias);
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ext->aliases[ext->num_aliases] = name;
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ext->num_aliases++;
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#ifdef LBX
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return LbxAddExtensionAlias(ext->index, alias);
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#else
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return TRUE;
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#endif
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}
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static int
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FindExtension(extname, len)
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char *extname;
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int len;
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{
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int i, j;
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for (i=0; i<NumExtensions; i++)
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{
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if ((strlen(extensions[i]->name) == len) &&
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!strncmp(extname, extensions[i]->name, len))
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break;
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for (j = extensions[i]->num_aliases; --j >= 0;)
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{
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if ((strlen(extensions[i]->aliases[j]) == len) &&
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!strncmp(extname, extensions[i]->aliases[j], len))
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break;
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}
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if (j >= 0) break;
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}
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return ((i == NumExtensions) ? -1 : i);
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}
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void
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DeclareExtensionSecurity(extname, secure)
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char *extname;
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Bool secure;
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{
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#ifdef XCSECURITY
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int i = FindExtension(extname, strlen(extname));
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if (i >= 0)
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{
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int majorop = extensions[i]->base;
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extensions[i]->secure = secure;
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if (secure)
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{
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UntrustedProcVector[majorop] = ProcVector[majorop];
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SwappedUntrustedProcVector[majorop] = SwappedProcVector[majorop];
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}
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else
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{
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UntrustedProcVector[majorop] = ProcBadRequest;
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SwappedUntrustedProcVector[majorop] = ProcBadRequest;
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}
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}
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#endif
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#ifdef LBX
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LbxDeclareExtensionSecurity(extname, secure);
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#endif
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}
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unsigned short
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StandardMinorOpcode(client)
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ClientPtr client;
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{
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return ((xReq *)client->requestBuffer)->data;
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}
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unsigned short
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MinorOpcodeOfRequest(client)
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ClientPtr client;
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{
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unsigned char major;
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major = ((xReq *)client->requestBuffer)->reqType;
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if (major < EXTENSION_BASE)
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return 0;
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major -= EXTENSION_BASE;
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if (major >= NumExtensions)
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return 0;
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return (*extensions[major]->MinorOpcode)(client);
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}
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void
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CloseDownExtensions()
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{
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register int i,j;
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#ifdef LBX
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LbxCloseDownExtensions();
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#endif
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for (i = NumExtensions - 1; i >= 0; i--)
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{
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(* extensions[i]->CloseDown)(extensions[i]);
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NumExtensions = i;
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xfree(extensions[i]->name);
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for (j = extensions[i]->num_aliases; --j >= 0;)
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xfree(extensions[i]->aliases[j]);
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xfree(extensions[i]->aliases);
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xfree(extensions[i]);
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}
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xfree(extensions);
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extensions = (ExtensionEntry **)NULL;
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lastEvent = EXTENSION_EVENT_BASE;
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lastError = FirstExtensionError;
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for (i=0; i<MAXSCREENS; i++)
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{
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register ScreenProcEntry *spentry = &AuxillaryScreenProcs[i];
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while (spentry->num)
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{
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spentry->num--;
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xfree(spentry->procList[spentry->num].name);
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}
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xfree(spentry->procList);
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spentry->procList = (ProcEntryPtr)NULL;
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}
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}
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int
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ProcQueryExtension(client)
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ClientPtr client;
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{
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xQueryExtensionReply reply;
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int i;
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REQUEST(xQueryExtensionReq);
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REQUEST_FIXED_SIZE(xQueryExtensionReq, stuff->nbytes);
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reply.type = X_Reply;
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reply.length = 0;
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reply.major_opcode = 0;
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reply.sequenceNumber = client->sequence;
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if ( ! NumExtensions )
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reply.present = xFalse;
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else
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{
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i = FindExtension((char *)&stuff[1], stuff->nbytes);
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if (i < 0
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#ifdef XCSECURITY
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/* don't show insecure extensions to untrusted clients */
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|| (client->trustLevel == XSecurityClientUntrusted &&
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!extensions[i]->secure)
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#endif
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)
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reply.present = xFalse;
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else
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{
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reply.present = xTrue;
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reply.major_opcode = extensions[i]->base;
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reply.first_event = extensions[i]->eventBase;
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reply.first_error = extensions[i]->errorBase;
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}
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}
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WriteReplyToClient(client, sizeof(xQueryExtensionReply), &reply);
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return(client->noClientException);
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}
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int
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ProcListExtensions(client)
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ClientPtr client;
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{
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xListExtensionsReply reply;
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char *bufptr, *buffer;
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int total_length = 0;
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REQUEST(xReq);
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REQUEST_SIZE_MATCH(xReq);
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reply.type = X_Reply;
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reply.nExtensions = 0;
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reply.length = 0;
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reply.sequenceNumber = client->sequence;
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buffer = NULL;
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if ( NumExtensions )
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{
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register int i, j;
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for (i=0; i<NumExtensions; i++)
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{
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#ifdef XCSECURITY
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/* don't show insecure extensions to untrusted clients */
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if (client->trustLevel == XSecurityClientUntrusted &&
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!extensions[i]->secure)
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continue;
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#endif
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total_length += strlen(extensions[i]->name) + 1;
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reply.nExtensions += 1 + extensions[i]->num_aliases;
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for (j = extensions[i]->num_aliases; --j >= 0;)
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total_length += strlen(extensions[i]->aliases[j]) + 1;
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}
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reply.length = (total_length + 3) >> 2;
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buffer = bufptr = (char *)ALLOCATE_LOCAL(total_length);
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if (!buffer)
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return(BadAlloc);
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for (i=0; i<NumExtensions; i++)
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{
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int len;
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#ifdef XCSECURITY
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if (client->trustLevel == XSecurityClientUntrusted &&
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!extensions[i]->secure)
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continue;
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#endif
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*bufptr++ = len = strlen(extensions[i]->name);
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memmove(bufptr, extensions[i]->name, len);
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bufptr += len;
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for (j = extensions[i]->num_aliases; --j >= 0;)
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{
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*bufptr++ = len = strlen(extensions[i]->aliases[j]);
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memmove(bufptr, extensions[i]->aliases[j], len);
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bufptr += len;
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}
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}
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}
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WriteReplyToClient(client, sizeof(xListExtensionsReply), &reply);
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if (reply.length)
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{
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WriteToClient(client, total_length, buffer);
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DEALLOCATE_LOCAL(buffer);
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}
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return(client->noClientException);
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}
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ExtensionLookupProc
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LookupProc(name, pGC)
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char *name;
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GCPtr pGC;
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{
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register int i;
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register ScreenProcEntry *spentry;
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spentry = &AuxillaryScreenProcs[pGC->pScreen->myNum];
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if (spentry->num)
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{
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for (i = 0; i < spentry->num; i++)
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if (strcmp(name, spentry->procList[i].name) == 0)
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return(spentry->procList[i].proc);
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}
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return (ExtensionLookupProc)NULL;
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}
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Bool
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RegisterProc(name, pGC, proc)
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char *name;
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GC *pGC;
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ExtensionLookupProc proc;
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{
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return RegisterScreenProc(name, pGC->pScreen, proc);
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}
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Bool
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RegisterScreenProc(name, pScreen, proc)
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char *name;
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ScreenPtr pScreen;
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ExtensionLookupProc proc;
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{
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register ScreenProcEntry *spentry;
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register ProcEntryPtr procEntry = (ProcEntryPtr)NULL;
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char *newname;
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int i;
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spentry = &AuxillaryScreenProcs[pScreen->myNum];
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/* first replace duplicates */
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if (spentry->num)
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{
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for (i = 0; i < spentry->num; i++)
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if (strcmp(name, spentry->procList[i].name) == 0)
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{
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procEntry = &spentry->procList[i];
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break;
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}
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}
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if (procEntry)
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procEntry->proc = proc;
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else
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{
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newname = (char *)xalloc(strlen(name)+1);
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if (!newname)
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return FALSE;
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procEntry = (ProcEntryPtr)
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xrealloc(spentry->procList,
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sizeof(ProcEntryRec) * (spentry->num+1));
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if (!procEntry)
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{
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xfree(newname);
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return FALSE;
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}
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spentry->procList = procEntry;
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procEntry += spentry->num;
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procEntry->name = newname;
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strcpy(newname, name);
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procEntry->proc = proc;
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spentry->num++;
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}
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return TRUE;
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}
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