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/*********************************************************
* Copyright (C) 1998 VMware, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation version 2.1 and no later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the Lesser GNU General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
*********************************************************/
/*
* guest_msg_def.h --
*
* Second layer of the internal communication channel between guest
* applications and vmware
*
*/
#ifndef _GUEST_MSG_DEF_H_
#define _GUEST_MSG_DEF_H_
#define INCLUDE_ALLOW_MODULE
#define INCLUDE_ALLOW_USERLEVEL
#define INCLUDE_ALLOW_VMMEXT
#include "includeCheck.h"
/* Basic request types */
typedef enum {
MESSAGE_TYPE_OPEN,
MESSAGE_TYPE_SENDSIZE,
MESSAGE_TYPE_SENDPAYLOAD,
MESSAGE_TYPE_RECVSIZE,
MESSAGE_TYPE_RECVPAYLOAD,
MESSAGE_TYPE_RECVSTATUS,
MESSAGE_TYPE_CLOSE,
} MessageType;
/* Reply statuses */
/* The basic request succeeded */
#define MESSAGE_STATUS_SUCCESS 0x0001
/* vmware has a message available for its party */
#define MESSAGE_STATUS_DORECV 0x0002
/* The channel has been closed */
#define MESSAGE_STATUS_CLOSED 0x0004
/* vmware removed the message before the party fetched it */
#define MESSAGE_STATUS_UNSENT 0x0008
/* A checkpoint occurred */
#define MESSAGE_STATUS_CPT 0x0010
/* An underlying device is powering off */
#define MESSAGE_STATUS_POWEROFF 0x0020
/* vmware has detected a timeout on the channel */
#define MESSAGE_STATUS_TIMEOUT 0x0040
/* vmware supports high-bandwidth for sending and receiving the payload */
#define MESSAGE_STATUS_HB 0x0080
/*
* This mask defines the status bits that the guest is allowed to set;
* we use this to mask out all other bits when receiving the status
* from the guest. Otherwise, the guest can manipulate VMX state by
* setting status bits that are only supposed to be changed by the
* VMX. See bug 45385.
*/
#define MESSAGE_STATUS_GUEST_MASK MESSAGE_STATUS_SUCCESS
/*
* Max number of channels.
* Unfortunately this has to be public because the monitor part
* of the backdoor needs it for its trivial-case optimization. [greg]
*/
#define GUESTMSG_MAX_CHANNEL 8
/* Flags to open a channel. --hpreg */
#define GUESTMSG_FLAG_COOKIE 0x80000000
#define GUESTMSG_FLAG_ALL GUESTMSG_FLAG_COOKIE
/*
* Maximum size of incoming message. This is to prevent denial of host service
* attacks from guest applications.
*/
#define GUESTMSG_MAX_IN_SIZE (64 * 1024)
#endif /* _GUEST_MSG_DEF_H_ */
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