272 lines
6.8 KiB
C
272 lines
6.8 KiB
C
/* $Xorg: lbxexts.c,v 1.3 2000/08/17 19:53:31 cpqbld Exp $ */
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/*
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* Copyright 1994 Network Computing Devices, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee, provided
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* that 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, and that the name Network Computing Devices, Inc. not be
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* used in advertising or publicity pertaining to distribution of this
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* software without specific, written prior permission.
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*
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* THIS SOFTWARE IS PROVIDED `AS-IS'. NETWORK COMPUTING DEVICES, INC.,
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* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT
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* LIMITATION ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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* PARTICULAR PURPOSE, OR NONINFRINGEMENT. IN NO EVENT SHALL NETWORK
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* COMPUTING DEVICES, INC., BE LIABLE FOR ANY DAMAGES WHATSOEVER, INCLUDING
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* SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING LOSS OF USE, DATA,
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* OR PROFITS, EVEN IF ADVISED OF THE POSSIBILITY THEREOF, AND REGARDLESS OF
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* WHETHER IN AN ACTION IN CONTRACT, TORT OR NEGLIGENCE, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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/* $XFree86: xc/programs/Xserver/lbx/lbxexts.c,v 1.2 2000/05/18 23:46:24 dawes Exp $ */
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#include <X11/X.h>
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#include <X11/Xproto.h>
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#include "misc.h"
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#include "dixstruct.h"
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#include "colormapst.h"
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#include "propertyst.h"
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#define _XLBX_SERVER_
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#include <X11/extensions/lbxstr.h>
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#include "lbxserve.h"
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#ifdef XCSECURITY
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#define _SECURITY_SERVER
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#include <X11/extensions/security.h>
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#endif
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typedef struct _lbxext {
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char *name;
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char **aliases;
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int num_aliases;
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int idx;
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int opcode;
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int ev_base;
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int err_base;
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int num_reqs;
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CARD8 *rep_mask;
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CARD8 *ev_mask;
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#ifdef XCSECURITY
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Bool secure;
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#endif
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} LbxExtensionEntry;
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static LbxExtensionEntry **lbx_extensions = NULL;
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static int num_exts = 0;
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Bool
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LbxAddExtension(char *name,
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int opcode,
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int ev_base,
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int err_base)
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{
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int i;
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LbxExtensionEntry *ext,
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**newexts;
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ext = (LbxExtensionEntry *) xalloc(sizeof(LbxExtensionEntry));
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if (!ext)
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return FALSE;
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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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xfree(ext);
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return FALSE;
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}
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strcpy(ext->name, name);
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i = num_exts;
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newexts = (LbxExtensionEntry **) xrealloc(lbx_extensions,
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(i + 1) * sizeof(LbxExtensionEntry *));
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if (!newexts) {
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xfree(ext->name);
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xfree(ext);
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return FALSE;
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}
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num_exts++;
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lbx_extensions = newexts;
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lbx_extensions[i] = ext;
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ext->idx = i;
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ext->opcode = opcode;;
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ext->ev_base = ev_base;;
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ext->err_base = err_base;
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ext->ev_mask = NULL;
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ext->rep_mask = NULL;
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ext->num_reqs = 0;
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#ifdef XCSECURITY
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ext->secure = FALSE;
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#endif
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return TRUE;
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}
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Bool
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LbxAddExtensionAlias(int idx,
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char *alias)
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{
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char *name;
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char **aliases;
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LbxExtensionEntry *ext = lbx_extensions[idx];
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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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return TRUE;
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}
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static int
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LbxFindExtension(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 < num_exts; i++) {
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if ((strlen(lbx_extensions[i]->name) == len) &&
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(strncmp(lbx_extensions[i]->name, extname, len) == 0))
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return i;
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for (j = lbx_extensions[i]->num_aliases; --j >= 0;) {
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if ((strlen(lbx_extensions[i]->aliases[j]) == len) &&
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(strncmp(lbx_extensions[i]->aliases[j], extname, len) == 0))
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return i;
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}
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}
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return -1;
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}
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void
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LbxDeclareExtensionSecurity(char *extname,
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Bool secure)
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{
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#ifdef XCSECURITY
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int i = LbxFindExtension(extname, strlen(extname));
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if (i >= 0)
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lbx_extensions[i]->secure = secure;
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#endif
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}
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Bool
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LbxRegisterExtensionGenerationMasks(int idx,
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int num_reqs,
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char *rep_mask,
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char *ev_mask)
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{
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LbxExtensionEntry *ext = lbx_extensions[idx];
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CARD8 *nrm,
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*nem;
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int mlen = mlen = num_reqs / (8 * sizeof(CARD8)) + 1;
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nrm = (CARD8 *) xalloc(sizeof(CARD8) * mlen);
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nem = (CARD8 *) xalloc(sizeof(CARD8) * mlen);
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if (!nrm || !nem) {
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xfree(nrm);
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xfree(nem);
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return FALSE;
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}
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memcpy((char *) nrm, (char *) rep_mask, mlen);
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memcpy((char *) nem, (char *) ev_mask, mlen);
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ext->rep_mask = nrm;
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ext->ev_mask = nem;
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ext->num_reqs = num_reqs;
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return TRUE;
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}
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int
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LbxQueryExtension(ClientPtr client,
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char *ename,
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int nlen)
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{
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xLbxQueryExtensionReply rep;
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int i;
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int mlen = 0;
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rep.type = X_Reply;
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rep.sequenceNumber = client->sequence;
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rep.major_opcode = 0;
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rep.present = FALSE;
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rep.length = 0;
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rep.pad0 = rep.pad1 = rep.pad2 = rep.pad3 = rep.pad4 = 0;
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i = LbxFindExtension(ename, nlen);
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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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!lbx_extensions[i]->secure)
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#endif
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)
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rep.present = FALSE;
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else {
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rep.present = TRUE;
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rep.major_opcode = lbx_extensions[i]->opcode;
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rep.first_event = lbx_extensions[i]->ev_base;
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rep.first_error = lbx_extensions[i]->err_base;
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rep.numReqs = lbx_extensions[i]->num_reqs;
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if (lbx_extensions[i]->rep_mask) {
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mlen = (lbx_extensions[i]->num_reqs + 7) >> 3;
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rep.length = ((mlen + 3) >> 2) * 2;
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}
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}
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if (client->swapped) {
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char n;
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swaps(&rep.sequenceNumber, n);
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swapl(&rep.length, n);
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}
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WriteToClient(client, sizeof(xLbxQueryExtensionReply), (char *)&rep);
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if (mlen) {
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WriteToClient(client, mlen, (char *)lbx_extensions[i]->rep_mask);
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WriteToClient(client, mlen, (char *)lbx_extensions[i]->ev_mask);
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}
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return Success;
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}
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void
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LbxCloseDownExtensions(void)
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{
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int i,j;
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for (i = 0; i < num_exts; i++) {
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xfree(lbx_extensions[i]->name);
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for (j = 0; j < lbx_extensions[i]->num_aliases; j++)
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xfree(lbx_extensions[i]->aliases[j]);
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xfree(lbx_extensions[i]->aliases);
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xfree(lbx_extensions[i]->rep_mask);
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xfree(lbx_extensions[i]->ev_mask);
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xfree(lbx_extensions[i]);
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}
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xfree(lbx_extensions);
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lbx_extensions = NULL;
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num_exts = 0;
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}
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void
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LbxSetReqMask(CARD8 *mask,
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int req,
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Bool on)
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{
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int mword = req / (8 * sizeof(CARD8));
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req = req % (8 * sizeof(CARD8));
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if (on) {
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mask[mword] |= (1 << req);
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} else {
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mask[mword] &= ~(1 << req);
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}
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}
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