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598 lines
16 KiB
C
598 lines
16 KiB
C
/* $XFree86: xc/programs/Xserver/os/lbxio.c,v 3.19 2004/06/02 22:43:06 dawes Exp $ */
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/*
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Copyright 1996, 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 1987, 1989 by Digital Equipment Corporation, Maynard, Massachusetts,
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and the Massachusetts Institute of Technology, Cambridge, 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 names of Digital or MIT 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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/*
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* Copyright (c) 1996-2004 by The XFree86 Project, Inc.
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject
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* to the following conditions:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution, and in the same place and form as other copyright,
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* license and disclaimer information.
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*
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* 3. The end-user documentation included with the redistribution,
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* if any, must include the following acknowledgment: "This product
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* includes software developed by The XFree86 Project, Inc
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* (http://www.xfree86.org/) and its contributors", in the same
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* place and form as other third-party acknowledgments. Alternately,
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* this acknowledgment may appear in the software itself, in the
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* same form and location as other such third-party acknowledgments.
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*
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* 4. Except as contained in this notice, the name of The XFree86
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* Project, Inc shall not be used in advertising or otherwise to
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* promote the sale, use or other dealings in this Software without
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* prior written authorization from The XFree86 Project, Inc.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE XFREE86 PROJECT, INC OR ITS CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef LBX
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#include <stdio.h>
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#include <X11/Xtrans.h>
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#include "Xmd.h"
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#include <errno.h>
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#ifndef Lynx
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#include <sys/param.h>
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#ifndef __UNIXOS2__
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#include <sys/uio.h>
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#endif
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#else
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#include <uio.h>
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#endif
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#include "X.h"
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#include "Xproto.h"
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#include "os.h"
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#include "Xpoll.h"
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#include "osdep.h"
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#include "opaque.h"
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#include "dixstruct.h"
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#include "misc.h"
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#include "colormapst.h"
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#include "propertyst.h"
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#include "lbxserve.h"
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/* check for both EAGAIN and EWOULDBLOCK, because some supposedly POSIX
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* systems are broken and return EWOULDBLOCK when they should return EAGAIN
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*/
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#if defined(EAGAIN) && defined(EWOULDBLOCK)
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#define ETEST(err) (err == EAGAIN || err == EWOULDBLOCK)
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#else
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#ifdef EAGAIN
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#define ETEST(err) (err == EAGAIN)
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#else
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#define ETEST(err) (err == EWOULDBLOCK)
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#endif
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#endif
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#define get_req_len(req,cli) ((cli)->swapped ? \
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lswaps((req)->length) : (req)->length)
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#define YieldControl() \
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{ isItTimeToYield = TRUE; \
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timesThisConnection = 0; }
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#define YieldControlNoInput() \
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{ YieldControl(); \
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FD_CLR(fd, &ClientsWithInput); }
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void
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SwitchClientInput (ClientPtr client, Bool pending)
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{
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OsCommPtr oc = (OsCommPtr)client->osPrivate;
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ConnectionTranslation[oc->fd] = client->index;
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if (pending)
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FD_SET(oc->fd, &ClientsWithInput);
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else
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YieldControl();
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}
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void
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LbxPrimeInput(ClientPtr client, LbxProxyPtr proxy)
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{
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OsCommPtr oc = (OsCommPtr)client->osPrivate;
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ConnectionInputPtr oci = oc->input;
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if (oci && proxy->compHandle) {
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char *extra = oci->bufptr + oci->lenLastReq;
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int left = oci->bufcnt + oci->buffer - extra;
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(*proxy->streamOpts.streamCompStuffInput)(oc->fd,
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(unsigned char *)extra,
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left);
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oci->bufcnt -= left;
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AvailableInput = oc;
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}
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}
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void
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AvailableClientInput (ClientPtr client)
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{
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OsCommPtr oc = (OsCommPtr)client->osPrivate;
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if (FD_ISSET(oc->fd, &AllSockets))
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FD_SET(oc->fd, &ClientsWithInput);
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}
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/*****************************************************************
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* AppendFakeRequest
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* Append a (possibly partial) request in as the last request.
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*
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**********************/
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Bool
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AppendFakeRequest (ClientPtr client, char *data, int count)
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{
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OsCommPtr oc = (OsCommPtr)client->osPrivate;
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ConnectionInputPtr oci = oc->input;
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int fd = oc->fd;
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int gotnow;
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if (!oci)
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{
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if ((oci = FreeInputs))
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FreeInputs = oci->next;
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else if (!(oci = AllocateInputBuffer()))
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return FALSE;
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oc->input = oci;
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} else if (AvailableInput == oc)
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AvailableInput = (OsCommPtr)NULL;
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/* do not free AvailableInput here, it could be proxy's */
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oci->bufptr += oci->lenLastReq;
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oci->lenLastReq = 0;
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gotnow = oci->bufcnt + oci->buffer - oci->bufptr;
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if ((gotnow + count) > oci->size)
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{
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char *ibuf;
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ibuf = (char *)xrealloc(oci->buffer, gotnow + count);
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if (!ibuf)
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return(FALSE);
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oci->size = gotnow + count;
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oci->buffer = ibuf;
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oci->bufptr = ibuf + oci->bufcnt - gotnow;
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}
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if (oci->bufcnt + count > oci->size) {
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memmove(oci->buffer, oci->bufptr, gotnow);
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oci->bufcnt = gotnow;
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oci->bufptr = oci->buffer;
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}
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memmove(oci->bufptr + gotnow, data, count);
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oci->bufcnt += count;
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gotnow += count;
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if ((gotnow >= sizeof(xReq)) &&
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(gotnow >= (int)(get_req_len((xReq *)oci->bufptr, client) << 2)))
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FD_SET(fd, &ClientsWithInput);
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else
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YieldControlNoInput();
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return(TRUE);
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}
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static int
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LbxWrite(XtransConnInfo trans_conn, LbxProxyPtr proxy,
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char *buf, int len)
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{
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struct iovec iov;
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int n;
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int notWritten;
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notWritten = len;
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iov.iov_base = buf;
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iov.iov_len = len;
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while (notWritten) {
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errno = 0;
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if (proxy->compHandle)
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n = (*proxy->streamOpts.streamCompWriteV)(proxy->fd, &iov, 1);
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else
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n = _XSERVTransWritev(trans_conn, &iov, 1);
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if (n >= 0) {
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iov.iov_base = (char *)iov.iov_base + n;
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notWritten -= n;
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iov.iov_len = notWritten;
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}
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else if (ETEST(errno)
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#ifdef SUNSYSV /* check for another brain-damaged OS bug */
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|| (errno == 0)
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#endif
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#ifdef EMSGSIZE /* check for another brain-damaged OS bug */
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|| ((errno == EMSGSIZE) && (iov.iov_len == 1))
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#endif
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)
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break;
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#ifdef EMSGSIZE /* check for another brain-damaged OS bug */
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else if (errno == EMSGSIZE)
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iov.iov_len >>= 1;
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#endif
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else
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return -1;
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}
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return len - notWritten;
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}
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static Bool
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LbxAppendOutput(LbxProxyPtr proxy, ClientPtr client, ConnectionOutputPtr oco)
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{
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ConnectionOutputPtr noco = proxy->olast;
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LbxClientPtr lbxClient = LbxClient(client);
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if (!lbxClient) {
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xfree(oco->buf);
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xfree(oco);
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return TRUE;
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}
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if (noco)
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LbxReencodeOutput(client,
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(char *)noco->buf, &noco->count,
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(char *)oco->buf, &oco->count);
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else
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LbxReencodeOutput(client,
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(char *)NULL, (int *)NULL,
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(char *)oco->buf, &oco->count);
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if (!oco->count) {
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if (oco->size > BUFWATERMARK)
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{
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xfree(oco->buf);
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xfree(oco);
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}
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else
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{
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oco->next = FreeOutputs;
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FreeOutputs = oco;
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}
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return TRUE;
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}
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if ((lbxClient->id != proxy->cur_send_id) && proxy->lbxClients[0]) {
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xLbxSwitchEvent *ev;
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int n;
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if (!noco || (noco->size - noco->count) < sz_xLbxSwitchEvent) {
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if ((noco = FreeOutputs))
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FreeOutputs = noco->next;
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else
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noco = AllocateOutputBuffer();
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if (!noco) {
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MarkClientException(client);
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return FALSE;
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}
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noco->next = NULL;
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if (proxy->olast)
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proxy->olast->next = noco;
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else
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proxy->ofirst = noco;
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proxy->olast = noco;
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}
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ev = (xLbxSwitchEvent *) (noco->buf + noco->count);
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noco->count += sz_xLbxSwitchEvent;
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proxy->cur_send_id = lbxClient->id;
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ev->type = LbxEventCode;
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ev->lbxType = LbxSwitchEvent;
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ev->pad = 0;
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ev->client = proxy->cur_send_id;
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if (LbxProxyClient(proxy)->swapped) {
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swapl(&ev->client, n);
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}
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}
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oco->next = NULL;
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if (proxy->olast)
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proxy->olast->next = oco;
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else
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proxy->ofirst = oco;
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proxy->olast = oco;
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return TRUE;
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}
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static int
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LbxClientOutput(ClientPtr client, OsCommPtr oc,
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char *extraBuf, int extraCount, Bool nocompress)
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{
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ConnectionOutputPtr oco;
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int len;
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if ((oco = oc->output)) {
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oc->output = NULL;
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if (!LbxAppendOutput(oc->proxy, client, oco))
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return -1;
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}
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if (extraCount) {
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NewOutputPending = TRUE;
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FD_SET(oc->fd, &OutputPending);
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len = (extraCount + 3) & ~3;
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if ((oco = FreeOutputs) && (oco->size >= len))
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FreeOutputs = oco->next;
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else {
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oco = (ConnectionOutputPtr)xalloc(sizeof(ConnectionOutput));
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if (!oco) {
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MarkClientException(client);
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return -1;
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}
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oco->size = len;
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if (oco->size < BUFSIZE)
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oco->size = BUFSIZE;
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oco->buf = (unsigned char *) xalloc(oco->size);
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if (!oco->buf) {
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xfree(oco);
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MarkClientException(client);
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return -1;
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}
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}
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oco->count = len;
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oco->nocompress = nocompress;
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memmove((char *)oco->buf, extraBuf, extraCount);
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if (!nocompress && oco->count < oco->size)
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oc->output = oco;
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else if (!LbxAppendOutput(oc->proxy, client, oco))
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return -1;
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}
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return extraCount;
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}
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void
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LbxForceOutput(LbxProxyPtr proxy)
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{
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int i;
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LbxClientPtr lbxClient;
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OsCommPtr coc;
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ConnectionOutputPtr oco;
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for (i = proxy->maxIndex; i >= 0; i--) { /* proxy must be last */
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lbxClient = proxy->lbxClients[i];
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if (!lbxClient)
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continue;
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coc = (OsCommPtr)lbxClient->client->osPrivate;
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if ((oco = coc->output)) {
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coc->output = NULL;
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LbxAppendOutput(proxy, lbxClient->client, oco);
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}
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}
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}
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int
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LbxFlushClient(ClientPtr who, OsCommPtr oc,
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char *extraBuf, int extraCount)
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{
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LbxProxyPtr proxy;
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ConnectionOutputPtr oco;
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int n;
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XtransConnInfo trans_conn = NULL;
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if (extraBuf)
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return LbxClientOutput(who, oc, extraBuf, extraCount, FALSE);
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proxy = oc->proxy;
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if (!proxy->lbxClients[0])
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return 0;
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LbxForceOutput(proxy);
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if (!proxy->compHandle)
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trans_conn = ((OsCommPtr)LbxProxyClient(proxy)->osPrivate)->trans_conn;
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while ((oco = proxy->ofirst)) {
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/* XXX bundle up into writev someday */
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if (proxy->compHandle) {
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if (oco->nocompress)
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(*proxy->streamOpts.streamCompOff)(proxy->fd);
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n = LbxWrite(NULL, proxy, (char *)oco->buf, oco->count);
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if (oco->nocompress)
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(*proxy->streamOpts.streamCompOn)(proxy->fd);
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} else
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n = LbxWrite(trans_conn, proxy, (char *)oco->buf, oco->count);
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if (n < 0) {
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ClientPtr pclient = LbxProxyClient(proxy);
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if (proxy->compHandle)
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trans_conn = ((OsCommPtr)pclient->osPrivate)->trans_conn;
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_XSERVTransDisconnect(trans_conn);
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_XSERVTransClose(trans_conn);
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((OsCommPtr)pclient->osPrivate)->trans_conn = NULL;
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MarkClientException(pclient);
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return 0;
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} else if (n == oco->count) {
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proxy->ofirst = oco->next;
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if (!proxy->ofirst)
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proxy->olast = NULL;
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if (oco->size > BUFWATERMARK)
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{
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xfree(oco->buf);
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xfree(oco);
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}
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else
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{
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oco->next = FreeOutputs;
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oco->count = 0;
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FreeOutputs = oco;
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}
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} else {
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if (n) {
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oco->count -= n;
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memmove((char *)oco->buf, (char *)oco->buf + n, oco->count);
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}
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break;
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}
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}
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if ((proxy->compHandle &&
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(*proxy->streamOpts.streamCompFlush)(proxy->fd)) ||
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proxy->ofirst) {
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FD_SET(proxy->fd, &ClientsWriteBlocked);
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AnyClientsWriteBlocked = TRUE;
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}
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return 0;
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}
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int
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UncompressedWriteToClient (ClientPtr who, int count, char *buf)
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{
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return LbxClientOutput(who, (OsCommPtr)who->osPrivate, buf, count, TRUE);
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}
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void
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LbxFreeOsBuffers(LbxProxyPtr proxy)
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{
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ConnectionOutputPtr oco;
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while ((oco = proxy->ofirst)) {
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proxy->ofirst = oco->next;
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xfree(oco->buf);
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xfree(oco);
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}
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}
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Bool
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AllocateLargeReqBuffer(ClientPtr client, int size)
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{
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OsCommPtr oc = (OsCommPtr)client->osPrivate;
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ConnectionInputPtr oci;
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if (!(oci = oc->largereq)) {
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if ((oci = FreeInputs))
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FreeInputs = oci->next;
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else {
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oci = (ConnectionInputPtr)xalloc(sizeof(ConnectionInput));
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if (!oci)
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return FALSE;
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oci->buffer = NULL;
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oci->size = 0;
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}
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}
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if (oci->size < size) {
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char *ibuf;
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oci->size = size;
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|
if (size < BUFSIZE)
|
|
oci->size = BUFSIZE;
|
|
if (!(ibuf = (char *)xrealloc(oci->buffer, oci->size)))
|
|
{
|
|
xfree(oci->buffer);
|
|
xfree(oci);
|
|
oc->largereq = NULL;
|
|
return FALSE;
|
|
}
|
|
oci->buffer = ibuf;
|
|
}
|
|
oci->bufptr = oci->buffer;
|
|
oci->bufcnt = 0;
|
|
oci->lenLastReq = size;
|
|
oc->largereq = oci;
|
|
return TRUE;
|
|
}
|
|
|
|
Bool
|
|
AddToLargeReqBuffer(ClientPtr client, char *data, int size)
|
|
{
|
|
OsCommPtr oc = (OsCommPtr)client->osPrivate;
|
|
ConnectionInputPtr oci = oc->largereq;
|
|
|
|
if (!oci || (oci->bufcnt + size > oci->lenLastReq))
|
|
return FALSE;
|
|
memcpy(oci->buffer + oci->bufcnt, data, size);
|
|
oci->bufcnt += size;
|
|
return TRUE;
|
|
}
|
|
|
|
static OsCommRec lbxAvailableInput;
|
|
|
|
int
|
|
PrepareLargeReqBuffer(ClientPtr client)
|
|
{
|
|
OsCommPtr oc = (OsCommPtr)client->osPrivate;
|
|
ConnectionInputPtr oci = oc->largereq;
|
|
|
|
if (!oci)
|
|
return client->req_len << 2;
|
|
oc->largereq = NULL;
|
|
if (oci->bufcnt != oci->lenLastReq) {
|
|
xfree(oci->buffer);
|
|
xfree(oci);
|
|
return client->req_len << 2;
|
|
}
|
|
client->requestBuffer = oci->buffer;
|
|
client->req_len = oci->lenLastReq >> 2;
|
|
oci->bufcnt = 0;
|
|
oci->lenLastReq = 0;
|
|
if (AvailableInput)
|
|
{
|
|
ConnectionInputPtr aci = AvailableInput->input;
|
|
if (aci->size > BUFWATERMARK)
|
|
{
|
|
xfree(aci->buffer);
|
|
xfree(aci);
|
|
}
|
|
else
|
|
{
|
|
aci->next = FreeInputs;
|
|
FreeInputs = aci;
|
|
}
|
|
AvailableInput->input = (ConnectionInputPtr)NULL;
|
|
}
|
|
lbxAvailableInput.input = oci;
|
|
AvailableInput = &lbxAvailableInput;
|
|
return client->req_len << 2;
|
|
}
|
|
#else
|
|
unsigned char LbxReqCode = 0;
|
|
#endif
|