Index: trunk/src/VBox/Additions/common/VBoxGuestLib/Makefile.kmk
===================================================================
--- trunk/src/VBox/Additions/common/VBoxGuestLib/Makefile.kmk	(revision 43343)
+++ trunk/src/VBox/Additions/common/VBoxGuestLib/Makefile.kmk	(revision 43346)
@@ -107,4 +107,5 @@
 	VBoxGuestR3LibEvent.cpp \
 	VBoxGuestR3LibGR.cpp \
+	VBoxGuestR3LibHostChannel.cpp \
 	VBoxGuestR3LibLog.cpp \
 	VBoxGuestR3LibMisc.cpp \
Index: trunk/src/VBox/Additions/common/VBoxGuestLib/VBoxGuestR3LibHostChannel.cpp
===================================================================
--- trunk/src/VBox/Additions/common/VBoxGuestLib/VBoxGuestR3LibHostChannel.cpp	(revision 43346)
+++ trunk/src/VBox/Additions/common/VBoxGuestLib/VBoxGuestR3LibHostChannel.cpp	(revision 43346)
@@ -0,0 +1,277 @@
+/* $Id$ */
+/** @file
+ * VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, Host Channel.
+ */
+
+/*
+ * Copyright (C) 2012 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+ 
+#include <iprt/mem.h>
+
+#include <VBox/HostServices/VBoxHostChannel.h>
+
+#include "VBGLR3Internal.h"
+
+
+VBGLR3DECL(int) VbglR3HostChannelInit(uint32_t *pu32HGCMClientId)
+{
+    VBoxGuestHGCMConnectInfo connectInfo;
+    RT_ZERO(connectInfo);
+
+    connectInfo.result = VERR_WRONG_ORDER;
+    connectInfo.Loc.type = VMMDevHGCMLoc_LocalHost_Existing;
+    strcpy(connectInfo.Loc.u.host.achName, "VBoxHostChannel");
+    connectInfo.u32ClientID = 0;
+
+    int rc = vbglR3DoIOCtl(VBOXGUEST_IOCTL_HGCM_CONNECT, &connectInfo, sizeof(connectInfo));
+
+    if (RT_SUCCESS(rc))
+    {
+        rc = connectInfo.result;
+
+        if (RT_SUCCESS(rc))
+        {
+            *pu32HGCMClientId = connectInfo.u32ClientID;
+        }
+    }
+
+    return rc;
+}
+
+VBGLR3DECL(void) VbglR3HostChannelTerm(uint32_t u32HGCMClientId)
+{
+    VBoxGuestHGCMDisconnectInfo disconnectInfo;
+    disconnectInfo.result = VERR_WRONG_ORDER;
+    disconnectInfo.u32ClientID = u32HGCMClientId;
+
+    vbglR3DoIOCtl(VBOXGUEST_IOCTL_HGCM_DISCONNECT, &disconnectInfo, sizeof(disconnectInfo));
+}
+
+VBGLR3DECL(int) VbglR3HostChannelAttach(uint32_t *pu32ChannelHandle,
+                                        uint32_t u32HGCMClientId,
+                                        const char *pszName,
+                                        uint32_t u32Flags)
+{
+    /* Make a heap copy of the name, because HGCM can not use some of other memory types. */
+    size_t cbName = strlen(pszName) + 1;
+    char *pszCopy = (char *)RTMemAlloc(cbName);
+    if (pszCopy == NULL)
+    {
+        return VERR_NO_MEMORY;
+    }
+
+    memcpy(pszCopy, pszName, cbName);
+
+    VBoxHostChannelAttach parms;
+
+    parms.hdr.result = VERR_WRONG_ORDER;
+    parms.hdr.u32ClientID = u32HGCMClientId;
+    parms.hdr.u32Function = VBOX_HOST_CHANNEL_FN_ATTACH;
+    parms.hdr.cParms = 3;
+
+    VbglHGCMParmPtrSet(&parms.name, pszCopy, (uint32_t)cbName);
+    VbglHGCMParmUInt32Set(&parms.flags, u32Flags);
+    VbglHGCMParmUInt32Set(&parms.handle, 0);
+
+    int rc = vbglR3DoIOCtl(VBOXGUEST_IOCTL_HGCM_CALL(sizeof(parms)), &parms, sizeof(parms));
+
+    if (RT_SUCCESS(rc))
+    {
+        rc = parms.hdr.result;
+        if (RT_SUCCESS(rc))
+        {
+            *pu32ChannelHandle = parms.handle.u.value32;
+        }
+    }
+
+    RTMemFree(pszCopy);
+
+    return rc;
+}
+
+VBGLR3DECL(void) VbglR3HostChannelDetach(uint32_t u32ChannelHandle,
+                                         uint32_t u32HGCMClientId)
+{
+    VBoxHostChannelDetach parms;
+
+    parms.hdr.result = VERR_WRONG_ORDER;
+    parms.hdr.u32ClientID = u32HGCMClientId;
+    parms.hdr.u32Function = VBOX_HOST_CHANNEL_FN_DETACH;
+    parms.hdr.cParms = 1;
+
+    VbglHGCMParmUInt32Set(&parms.handle, u32ChannelHandle);
+
+    vbglR3DoIOCtl(VBOXGUEST_IOCTL_HGCM_CALL(sizeof(parms)), &parms, sizeof(parms));
+}
+
+VBGLR3DECL(int) VbglR3HostChannelSend(uint32_t u32ChannelHandle,
+                                      uint32_t u32HGCMClientId,
+                                      void *pvData,
+                                      uint32_t cbData)
+{
+    VBoxHostChannelSend parms;
+
+    parms.hdr.result = VERR_WRONG_ORDER;
+    parms.hdr.u32ClientID = u32HGCMClientId;
+    parms.hdr.u32Function = VBOX_HOST_CHANNEL_FN_SEND;
+    parms.hdr.cParms = 2;
+
+    VbglHGCMParmUInt32Set(&parms.handle, u32ChannelHandle);
+    VbglHGCMParmPtrSet(&parms.data, pvData, cbData);
+
+    int rc = vbglR3DoIOCtl(VBOXGUEST_IOCTL_HGCM_CALL(sizeof(parms)), &parms, sizeof(parms));
+
+    if (RT_SUCCESS(rc))
+    {
+        rc = parms.hdr.result;
+    }
+
+    return rc;
+}
+
+VBGLR3DECL(int) VbglR3HostChannelRecv(uint32_t u32ChannelHandle,
+                                      uint32_t u32HGCMClientId,
+                                      void *pvData,
+                                      uint32_t cbData,
+                                      uint32_t *pu32SizeReceived,
+                                      uint32_t *pu32SizeRemaining)
+{
+    VBoxHostChannelRecv parms;
+
+    parms.hdr.result = VERR_WRONG_ORDER;
+    parms.hdr.u32ClientID = u32HGCMClientId;
+    parms.hdr.u32Function = VBOX_HOST_CHANNEL_FN_RECV;
+    parms.hdr.cParms = 4;
+
+    VbglHGCMParmUInt32Set(&parms.handle, u32ChannelHandle);
+    VbglHGCMParmPtrSet(&parms.data, pvData, cbData);
+    VbglHGCMParmUInt32Set(&parms.sizeReceived, 0);
+    VbglHGCMParmUInt32Set(&parms.sizeRemaining, 0);
+
+    int rc = vbglR3DoIOCtl(VBOXGUEST_IOCTL_HGCM_CALL(sizeof(parms)), &parms, sizeof(parms));
+
+    if (RT_SUCCESS(rc))
+    {
+        rc = parms.hdr.result;
+
+        if (RT_SUCCESS(rc))
+        {
+            *pu32SizeReceived = parms.sizeReceived.u.value32;
+            *pu32SizeRemaining = parms.sizeRemaining.u.value32;
+        }
+    }
+
+    return rc;
+}
+
+VBGLR3DECL(int) VbglR3HostChannelControl(uint32_t u32ChannelHandle,
+                                         uint32_t u32HGCMClientId,
+                                         uint32_t u32Code,
+                                         void *pvParm,
+                                         uint32_t cbParm,
+                                         void *pvData,
+                                         uint32_t cbData,
+                                         uint32_t *pu32SizeDataReturned)
+{
+    VBoxHostChannelControl parms;
+
+    parms.hdr.result = VERR_WRONG_ORDER;
+    parms.hdr.u32ClientID = u32HGCMClientId;
+    parms.hdr.u32Function = VBOX_HOST_CHANNEL_FN_CONTROL;
+    parms.hdr.cParms = 5;
+
+    VbglHGCMParmUInt32Set(&parms.handle, u32ChannelHandle);
+    VbglHGCMParmUInt32Set(&parms.code, u32Code);
+    VbglHGCMParmPtrSet(&parms.parm, pvParm, cbParm);
+    VbglHGCMParmPtrSet(&parms.data, pvData, cbData);
+    VbglHGCMParmUInt32Set(&parms.sizeDataReturned, 0);
+
+    int rc = vbglR3DoIOCtl(VBOXGUEST_IOCTL_HGCM_CALL(sizeof(parms)), &parms, sizeof(parms));
+
+    if (RT_SUCCESS(rc))
+    {
+        rc = parms.hdr.result;
+
+        if (RT_SUCCESS(rc))
+        {
+            *pu32SizeDataReturned = parms.sizeDataReturned.u.value32;
+        }
+    }
+
+    return rc;
+}
+
+VBGLR3DECL(int) VbglR3HostChannelEventWait(uint32_t *pu32ChannelHandle,
+                                           uint32_t u32HGCMClientId,
+                                           uint32_t *pu32EventId,
+                                           void *pvParm,
+                                           uint32_t cbParm,
+                                           uint32_t *pu32SizeReturned)
+{
+    VBoxHostChannelEventWait parms;
+
+    parms.hdr.result = VERR_WRONG_ORDER;
+    parms.hdr.u32ClientID = u32HGCMClientId;
+    parms.hdr.u32Function = VBOX_HOST_CHANNEL_FN_EVENT_WAIT;
+    parms.hdr.cParms = 4;
+
+    VbglHGCMParmUInt32Set(&parms.handle, 0);
+    VbglHGCMParmUInt32Set(&parms.id, 0);
+    VbglHGCMParmPtrSet(&parms.parm, pvParm, cbParm);
+    VbglHGCMParmUInt32Set(&parms.sizeReturned, 0);
+
+    int rc = vbglR3DoIOCtl(VBOXGUEST_IOCTL_HGCM_CALL(sizeof(parms)), &parms, sizeof(parms));
+
+    if (RT_SUCCESS(rc))
+    {
+        rc = parms.hdr.result;
+
+        if (RT_SUCCESS(rc))
+        {
+            *pu32ChannelHandle = parms.handle.u.value32;
+            *pu32EventId = parms.id.u.value32;
+            *pu32SizeReturned = parms.sizeReturned.u.value32;
+        }
+    }
+
+    return rc;
+}
+
+VBGLR3DECL(int) VbglR3HostChannelEventCancel(uint32_t u32ChannelHandle,
+                                             uint32_t u32HGCMClientId)
+{
+    VBoxHostChannelEventCancel parms;
+
+    parms.hdr.result = VERR_WRONG_ORDER;
+    parms.hdr.u32ClientID = u32HGCMClientId;
+    parms.hdr.u32Function = VBOX_HOST_CHANNEL_FN_EVENT_CANCEL;
+    parms.hdr.cParms = 0;
+
+    int rc = vbglR3DoIOCtl(VBOXGUEST_IOCTL_HGCM_CALL(sizeof(parms)), &parms, sizeof(parms));
+
+    if (RT_SUCCESS(rc))
+    {
+        rc = parms.hdr.result;
+    }
+
+    return rc;
+}
