320 lines
9.0 KiB
C
320 lines
9.0 KiB
C
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/* $Xorg: extensions.c,v 1.5 2001/02/09 02:05:31 xorgcvs Exp $ */
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/*
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Copyright 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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*/
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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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/* tracks server extensions */
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#include "lbx.h"
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#include "assert.h"
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#include "wire.h"
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#include "lbxext.h"
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#include "reqtype.h"
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#include "swap.h"
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typedef struct _extinfo {
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int nlen;
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char *name;
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int idx;
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int opcode;
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int event;
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int error;
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CARD8 *rep_mask,
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*ev_mask;
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int num_reqs;
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ExtensionInfoPtr next;
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} ExtensionInfoRec;
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static Bool
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AddExtension(server, name, reply, rep_mask, ev_mask)
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XServerPtr server;
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char *name;
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xLbxQueryExtensionReplyPtr reply;
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CARD8 *rep_mask,
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*ev_mask;
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{
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ExtensionInfoPtr eip = NULL;
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int req_mask_len;
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for (eip = server->extensions; eip; eip = eip->next) {
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if (!strcmp(eip->name, name))
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return TRUE;
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}
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eip = (ExtensionInfoPtr) xalloc(sizeof(ExtensionInfoRec));
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if (!eip)
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return FALSE;
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eip->nlen = strlen(name);
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eip->name = (char *) xalloc(eip->nlen + 1);
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if (!eip->name) {
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xfree(eip);
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return FALSE;
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}
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strcpy(eip->name, name);
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req_mask_len = (reply->numReqs + 7) >> 3;
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eip->rep_mask = (CARD8 *) xalloc(req_mask_len);
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eip->ev_mask = (CARD8 *) xalloc(req_mask_len);
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if (req_mask_len && (!eip->rep_mask || !eip->ev_mask)) {
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xfree(eip->rep_mask);
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xfree(eip->ev_mask);
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xfree(eip->name);
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xfree(eip);
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return FALSE;
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}
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if (reply->numReqs) {
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memcpy((char *) eip->rep_mask, (char *) rep_mask, req_mask_len);
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memcpy((char *) eip->ev_mask, (char *) ev_mask, req_mask_len);
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}
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eip->num_reqs = reply->numReqs;
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eip->opcode = reply->major_opcode;
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eip->event = reply->first_event;
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eip->error = reply->first_error;
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eip->next = server->extensions;
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server->extensions = eip;
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return TRUE;
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}
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void
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DeleteExtensions(server)
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XServerPtr server;
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{
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ExtensionInfoPtr eip;
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while ((eip = server->extensions)) {
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server->extensions = eip->next;
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xfree(eip->name);
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xfree(eip->rep_mask);
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xfree(eip->ev_mask);
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xfree(eip);
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}
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}
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/*ARGSUSED*/
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void
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HandleExtensionError(client, err, nr)
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ClientPtr client;
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xError *err;
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ReplyStuffPtr nr;
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{
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}
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/*ARGSUSED*/
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void
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HandleExtensionEvent(client, ev)
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ClientPtr client;
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xEvent *ev;
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{
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}
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static Bool
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check_mask(mask, minorop)
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CARD8 *mask;
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int minorop;
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{
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if (mask[minorop >> 3] & (1 << (minorop & 7)))
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return REQ_TYPE_YES;
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else
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return REQ_TYPE_NO;
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}
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Bool
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CheckExtensionForEvents(client, req)
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ClientPtr client;
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xReq *req;
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{
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int opcode = req->reqType;
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int minorop = req->data;
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ExtensionInfoPtr eip;
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for (eip = client->server->extensions; eip; eip = eip->next) {
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if (eip->opcode == opcode) {
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if (!eip->ev_mask || !eip->num_reqs)
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return TRUE; /* assume worst */
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return check_mask(eip->ev_mask, minorop);
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}
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}
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/* assume the worst */
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return TRUE;
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}
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Bool
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CheckExtensionForReplies(client, req)
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ClientPtr client;
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xReq *req;
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{
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int opcode = req->reqType;
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int minorop = req->data;
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ExtensionInfoPtr eip;
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for (eip = client->server->extensions; eip; eip = eip->next) {
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if (eip->opcode == opcode) {
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if (!eip->rep_mask || !eip->num_reqs)
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return REQ_TYPE_MAYBE; /* assume worst */
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return check_mask(eip->rep_mask, minorop);
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}
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}
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/* assume the worst */
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return REQ_TYPE_MAYBE;
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}
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static Bool
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HandleLbxQueryExtensionReply(client, nr, data)
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ClientPtr client;
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ReplyStuffPtr nr;
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char *data;
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{
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xLbxQueryExtensionReply *reply;
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xQueryExtensionReply crep;
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char *ename;
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CARD8 *rep_mask = NULL,
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*ev_mask = NULL;
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reply = (xLbxQueryExtensionReply *) data;
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ename = nr->request_info.lbxqueryextension.name;
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if (reply->length) {
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rep_mask = (CARD8 *) &reply[1];
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ev_mask = rep_mask + ((((reply->numReqs + 7) >> 3) + 3) & ~3);
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}
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if (reply->present)
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AddExtension(client->server, ename, reply, rep_mask, ev_mask);
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xfree(ename);
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/* and finally tell client about it */
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crep.type = X_Reply;
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crep.length = 0;
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crep.sequenceNumber = reply->sequenceNumber;
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crep.present = reply->present;
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crep.major_opcode = reply->major_opcode;
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crep.first_event = reply->first_event;
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crep.first_error = reply->first_error;
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if (client->swapped)
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SwapQueryExtensionReply(&crep);
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WriteToClient(client, sizeof(xQueryExtensionReply), (char *) &crep);
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return TRUE;
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}
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static int
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QueryExtensionReply(client, present, opcode, event, error)
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ClientPtr client;
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Bool present;
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int opcode, event, error;
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{
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xQueryExtensionReply reply;
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reply.type = X_Reply;
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reply.length = 0;
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reply.sequenceNumber = LBXSequenceNumber(client);
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reply.present = present;
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reply.major_opcode = opcode;
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reply.first_event = event;
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reply.first_error = error;
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if (client->swapped)
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SwapQueryExtensionReply(&reply);
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if (LBXCacheSafe(client)) {
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FinishLBXRequest(client, REQ_YANK);
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WriteToClient(client, sizeof(xQueryExtensionReply), (char *)&reply);
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} else { /* store for later */
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if (!LBXCanDelayReply(client))
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SendLbxSync(client);
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FinishLBXRequest(client, REQ_YANKLATE);
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SaveReplyData(client, (xReply *) &reply, 0, NULL);
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}
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return Success;
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}
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int
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ProcLBXQueryExtension(client)
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ClientPtr client;
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{
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REQUEST(xQueryExtensionReq);
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char n;
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char *ename;
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xLbxQueryExtensionReq req;
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CARD16 nlen;
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ReplyStuffPtr nr;
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ExtensionInfoPtr eip;
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nlen = stuff->nbytes;
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if (client->swapped) {
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swaps(&nlen, n);
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}
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if (nlen == (sizeof(LBXNAME) - 1) &&
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!strncmp((char *)&stuff[1], LBXNAME, nlen))
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return QueryExtensionReply(client, FALSE, 0, 0, 0);
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for (eip = client->server->extensions; eip; eip = eip->next) {
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if (nlen == eip->nlen && !strncmp((char *)&stuff[1], eip->name, nlen))
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return QueryExtensionReply(client, TRUE, eip->opcode,
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eip->event, eip->error);
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}
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ename = (char *) xalloc(nlen + 1);
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if (!ename)
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return BadAlloc;
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memcpy(ename, (char *) &stuff[1], nlen);
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ename[nlen] = '\0';
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req.reqType = client->server->lbxReq;
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req.lbxReqType = X_LbxQueryExtension;
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req.length = 2 + ((nlen + 3) >> 2);
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req.nbytes = nlen;
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if (client->swapped)
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SwapQueryExtension(&req);
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nr = NewReply(client, client->server->lbxReq, X_LbxQueryExtension,
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HandleLbxQueryExtensionReply);
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if (!nr) {
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xfree(ename);
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return ProcStandardRequest(client);
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}
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nr->request_info.lbxqueryextension.name = ename;
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FinishLBXRequest(client, REQ_PASSTHROUGH);
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WriteToServer(client, sizeof(req), (char *) &req, TRUE, TRUE);
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WriteToServer(client, nlen, ename, FALSE, TRUE);
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return Success;
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}
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