+++ /dev/null
-/***********************************************************
-
-Copyright (c) 1987 X Consortium
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-Except as contained in this notice, the name of the X Consortium shall not be
-used in advertising or otherwise to promote the sale, use or other dealings
-in this Software without prior written authorization from the X Consortium.
-
-
-Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of Digital not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-
-******************************************************************/
-/* $XConsortium: extension.c /main/36 1996/09/28 11:23:27 rws $ */
-/* $XFree86: xc/programs/Xserver/dix/extension.c,v 3.5 1996/12/23 06:29:44 dawes Exp $ */
-
-#include "X.h"
-#define NEED_EVENTS
-#define NEED_REPLIES
-#include "Xproto.h"
-#include "misc.h"
-#include "dixstruct.h"
-#include "extnsionst.h"
-#include "gcstruct.h"
-#include "scrnintstr.h"
-#include "dispatch.h"
-#ifdef XCSECURITY
-#define _SECURITY_SERVER
-#include "extensions/security.h"
-#endif
-
-#define EXTENSION_BASE 128
-#define EXTENSION_EVENT_BASE 64
-#define LAST_EVENT 128
-#define LAST_ERROR 255
-
-ScreenProcEntry AuxillaryScreenProcs[MAXSCREENS];
-
-static ExtensionEntry **extensions = (ExtensionEntry **)NULL;
-
-int lastEvent = EXTENSION_EVENT_BASE;
-static int lastError = FirstExtensionError;
-static unsigned int NumExtensions = 0;
-
-ExtensionEntry *AddExtension(name, NumEvents, NumErrors, MainProc,
- SwappedMainProc, CloseDownProc, MinorOpcodeProc)
- char *name;
- int NumEvents;
- int NumErrors;
- int (* MainProc)();
- int (* SwappedMainProc)();
- void (* CloseDownProc)();
- unsigned short (* MinorOpcodeProc)();
-{
- int i;
- register ExtensionEntry *ext, **newexts;
-
- if (!MainProc || !SwappedMainProc || !CloseDownProc || !MinorOpcodeProc)
- return((ExtensionEntry *) NULL);
- if ((lastEvent + NumEvents > LAST_EVENT) ||
- (unsigned)(lastError + NumErrors > LAST_ERROR))
- return((ExtensionEntry *) NULL);
-
- ext = (ExtensionEntry *) xalloc(sizeof(ExtensionEntry));
- if (!ext)
- return((ExtensionEntry *) NULL);
- ext->name = (char *)xalloc(strlen(name) + 1);
- ext->num_aliases = 0;
- ext->aliases = (char **)NULL;
- if (!ext->name)
- {
- xfree(ext);
- return((ExtensionEntry *) NULL);
- }
- strcpy(ext->name, name);
- i = NumExtensions;
- newexts = (ExtensionEntry **) xrealloc(extensions,
- (i + 1) * sizeof(ExtensionEntry *));
- if (!newexts)
- {
- xfree(ext->name);
- xfree(ext);
- return((ExtensionEntry *) NULL);
- }
- NumExtensions++;
- extensions = newexts;
- extensions[i] = ext;
- ext->index = i;
- ext->base = i + EXTENSION_BASE;
- ext->CloseDown = CloseDownProc;
- ext->MinorOpcode = MinorOpcodeProc;
- ProcVector[i + EXTENSION_BASE] = MainProc;
- SwappedProcVector[i + EXTENSION_BASE] = SwappedMainProc;
- if (NumEvents)
- {
- ext->eventBase = lastEvent;
- ext->eventLast = lastEvent + NumEvents;
- lastEvent += NumEvents;
- }
- else
- {
- ext->eventBase = 0;
- ext->eventLast = 0;
- }
- if (NumErrors)
- {
- ext->errorBase = lastError;
- ext->errorLast = lastError + NumErrors;
- lastError += NumErrors;
- }
- else
- {
- ext->errorBase = 0;
- ext->errorLast = 0;
- }
-#ifdef XCSECURITY
- ext->secure = FALSE;
-#endif
-
-#ifdef LBX
- (void) LbxAddExtension(name, ext->base, ext->eventBase, ext->errorBase);
-#endif
- return(ext);
-}
-
-Bool AddExtensionAlias(alias, ext)
- char *alias;
- ExtensionEntry *ext;
-{
- char *name;
- char **aliases;
-
- aliases = (char **)xrealloc(ext->aliases,
- (ext->num_aliases + 1) * sizeof(char *));
- if (!aliases)
- return FALSE;
- ext->aliases = aliases;
- name = (char *)xalloc(strlen(alias) + 1);
- if (!name)
- return FALSE;
- strcpy(name, alias);
- ext->aliases[ext->num_aliases] = name;
- ext->num_aliases++;
-#ifdef LBX
- return LbxAddExtensionAlias(ext->index, alias);
-#else
- return TRUE;
-#endif
-}
-
-static int
-FindExtension(extname, len)
- char *extname;
- int len;
-{
- int i, j;
-
- for (i=0; i<NumExtensions; i++)
- {
- if ((strlen(extensions[i]->name) == len) &&
- !strncmp(extname, extensions[i]->name, len))
- break;
- for (j = extensions[i]->num_aliases; --j >= 0;)
- {
- if ((strlen(extensions[i]->aliases[j]) == len) &&
- !strncmp(extname, extensions[i]->aliases[j], len))
- break;
- }
- if (j >= 0) break;
- }
- return ((i == NumExtensions) ? -1 : i);
-}
-
-void
-DeclareExtensionSecurity(extname, secure)
- char *extname;
- Bool secure;
-{
-#ifdef XCSECURITY
- int i = FindExtension(extname, strlen(extname));
- if (i >= 0)
- {
- int majorop = extensions[i]->base;
- extensions[i]->secure = secure;
- if (secure)
- {
- UntrustedProcVector[majorop] = ProcVector[majorop];
- SwappedUntrustedProcVector[majorop] = SwappedProcVector[majorop];
- }
- else
- {
- UntrustedProcVector[majorop] = ProcBadRequest;
- SwappedUntrustedProcVector[majorop] = ProcBadRequest;
- }
- }
-#endif
-#ifdef LBX
- LbxDeclareExtensionSecurity(extname, secure);
-#endif
-}
-
-unsigned short
-StandardMinorOpcode(client)
- ClientPtr client;
-{
- return ((xReq *)client->requestBuffer)->data;
-}
-
-unsigned short
-MinorOpcodeOfRequest(client)
- ClientPtr client;
-{
- unsigned char major;
-
- major = ((xReq *)client->requestBuffer)->reqType;
- if (major < EXTENSION_BASE)
- return 0;
- major -= EXTENSION_BASE;
- if (major >= NumExtensions)
- return 0;
- return (*extensions[major]->MinorOpcode)(client);
-}
-
-void
-CloseDownExtensions()
-{
- register int i,j;
-
-#ifdef LBX
- LbxCloseDownExtensions();
-#endif
-
- for (i = NumExtensions - 1; i >= 0; i--)
- {
- (* extensions[i]->CloseDown)(extensions[i]);
- NumExtensions = i;
- xfree(extensions[i]->name);
- for (j = extensions[i]->num_aliases; --j >= 0;)
- xfree(extensions[i]->aliases[j]);
- xfree(extensions[i]->aliases);
- xfree(extensions[i]);
- }
- xfree(extensions);
- extensions = (ExtensionEntry **)NULL;
- lastEvent = EXTENSION_EVENT_BASE;
- lastError = FirstExtensionError;
- for (i=0; i<MAXSCREENS; i++)
- {
- register ScreenProcEntry *spentry = &AuxillaryScreenProcs[i];
-
- while (spentry->num)
- {
- spentry->num--;
- xfree(spentry->procList[spentry->num].name);
- }
- xfree(spentry->procList);
- spentry->procList = (ProcEntryPtr)NULL;
- }
-}
-
-
-int
-ProcQueryExtension(client)
- ClientPtr client;
-{
- xQueryExtensionReply reply;
- int i;
- REQUEST(xQueryExtensionReq);
-
- REQUEST_FIXED_SIZE(xQueryExtensionReq, stuff->nbytes);
-
- reply.type = X_Reply;
- reply.length = 0;
- reply.major_opcode = 0;
- reply.sequenceNumber = client->sequence;
-
- if ( ! NumExtensions )
- reply.present = xFalse;
- else
- {
- i = FindExtension((char *)&stuff[1], stuff->nbytes);
- if (i < 0
-#ifdef XCSECURITY
- /* don't show insecure extensions to untrusted clients */
- || (client->trustLevel == XSecurityClientUntrusted &&
- !extensions[i]->secure)
-#endif
- )
- reply.present = xFalse;
- else
- {
- reply.present = xTrue;
- reply.major_opcode = extensions[i]->base;
- reply.first_event = extensions[i]->eventBase;
- reply.first_error = extensions[i]->errorBase;
- }
- }
- WriteReplyToClient(client, sizeof(xQueryExtensionReply), &reply);
- return(client->noClientException);
-}
-
-int
-ProcListExtensions(client)
- ClientPtr client;
-{
- xListExtensionsReply reply;
- char *bufptr, *buffer;
- int total_length = 0;
-
- REQUEST_SIZE_MATCH(xReq);
-
- reply.type = X_Reply;
- reply.nExtensions = 0;
- reply.length = 0;
- reply.sequenceNumber = client->sequence;
- buffer = NULL;
-
- if ( NumExtensions )
- {
- register int i, j;
-
- for (i=0; i<NumExtensions; i++)
- {
-#ifdef XCSECURITY
- /* don't show insecure extensions to untrusted clients */
- if (client->trustLevel == XSecurityClientUntrusted &&
- !extensions[i]->secure)
- continue;
-#endif
- total_length += strlen(extensions[i]->name) + 1;
- reply.nExtensions += 1 + extensions[i]->num_aliases;
- for (j = extensions[i]->num_aliases; --j >= 0;)
- total_length += strlen(extensions[i]->aliases[j]) + 1;
- }
- reply.length = (total_length + 3) >> 2;
- buffer = bufptr = (char *)ALLOCATE_LOCAL(total_length);
- if (!buffer)
- return(BadAlloc);
- for (i=0; i<NumExtensions; i++)
- {
- int len;
-#ifdef XCSECURITY
- if (client->trustLevel == XSecurityClientUntrusted &&
- !extensions[i]->secure)
- continue;
-#endif
- *bufptr++ = len = strlen(extensions[i]->name);
- memmove(bufptr, extensions[i]->name, len);
- bufptr += len;
- for (j = extensions[i]->num_aliases; --j >= 0;)
- {
- *bufptr++ = len = strlen(extensions[i]->aliases[j]);
- memmove(bufptr, extensions[i]->aliases[j], len);
- bufptr += len;
- }
- }
- }
- WriteReplyToClient(client, sizeof(xListExtensionsReply), &reply);
- if (reply.length)
- {
- WriteToClient(client, total_length, buffer);
- DEALLOCATE_LOCAL(buffer);
- }
- return(client->noClientException);
-}
-
-
-ExtensionLookupProc
-LookupProc(name, pGC)
- char *name;
- GCPtr pGC;
-{
- register int i;
- register ScreenProcEntry *spentry;
- spentry = &AuxillaryScreenProcs[pGC->pScreen->myNum];
- if (spentry->num)
- {
- for (i = 0; i < spentry->num; i++)
- if (strcmp(name, spentry->procList[i].name) == 0)
- return(spentry->procList[i].proc);
- }
- return (ExtensionLookupProc)NULL;
-}
-
-Bool
-RegisterProc(name, pGC, proc)
- char *name;
- GC *pGC;
- ExtensionLookupProc proc;
-{
- return RegisterScreenProc(name, pGC->pScreen, proc);
-}
-
-Bool
-RegisterScreenProc(name, pScreen, proc)
- char *name;
- ScreenPtr pScreen;
- ExtensionLookupProc proc;
-{
- register ScreenProcEntry *spentry;
- register ProcEntryPtr procEntry = (ProcEntryPtr)NULL;
- char *newname;
- int i;
-
- spentry = &AuxillaryScreenProcs[pScreen->myNum];
- /* first replace duplicates */
- if (spentry->num)
- {
- for (i = 0; i < spentry->num; i++)
- if (strcmp(name, spentry->procList[i].name) == 0)
- {
- procEntry = &spentry->procList[i];
- break;
- }
- }
- if (procEntry)
- procEntry->proc = proc;
- else
- {
- newname = (char *)xalloc(strlen(name)+1);
- if (!newname)
- return FALSE;
- procEntry = (ProcEntryPtr)
- xrealloc(spentry->procList,
- sizeof(ProcEntryRec) * (spentry->num+1));
- if (!procEntry)
- {
- xfree(newname);
- return FALSE;
- }
- spentry->procList = procEntry;
- procEntry += spentry->num;
- procEntry->name = newname;
- strcpy(newname, name);
- procEntry->proc = proc;
- spentry->num++;
- }
- return TRUE;
-}
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