--- /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;
+}
projects / rdpsrv / blobdiff