VirtualBox

source: vbox/trunk/include/VBox/HostServices/VBoxHostChannel.h@ 103224

Last change on this file since 103224 was 98103, checked in by vboxsync, 23 months ago

Copyright year updates by scm.

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Line 
1/** @file
2 *
3 * Host Channel: the service definition.
4 */
5
6/*
7 * Copyright (C) 2012-2023 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * The contents of this file may alternatively be used under the terms
26 * of the Common Development and Distribution License Version 1.0
27 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28 * in the VirtualBox distribution, in which case the provisions of the
29 * CDDL are applicable instead of those of the GPL.
30 *
31 * You may elect to license modified versions of this file under the
32 * terms and conditions of either the GPL or the CDDL or both.
33 *
34 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35 */
36
37#ifndef VBOX_INCLUDED_HostServices_VBoxHostChannel_h
38#define VBOX_INCLUDED_HostServices_VBoxHostChannel_h
39#ifndef RT_WITHOUT_PRAGMA_ONCE
40# pragma once
41#endif
42
43#include <VBox/VMMDevCoreTypes.h>
44#include <VBox/VBoxGuestCoreTypes.h>
45#include <VBox/hgcmsvc.h>
46
47/*
48 * Host calls.
49 */
50#define VBOX_HOST_CHANNEL_HOST_FN_REGISTER 1
51#define VBOX_HOST_CHANNEL_HOST_FN_UNREGISTER 2
52
53/*
54 * Guest calls.
55 */
56#define VBOX_HOST_CHANNEL_FN_ATTACH 1 /* Attach to a channel. */
57#define VBOX_HOST_CHANNEL_FN_DETACH 2 /* Detach from the channel. */
58#define VBOX_HOST_CHANNEL_FN_SEND 3 /* Send data to the host. */
59#define VBOX_HOST_CHANNEL_FN_RECV 4 /* Receive data from the host. */
60#define VBOX_HOST_CHANNEL_FN_CONTROL 5 /* Generic data exchange using a channel instance. */
61#define VBOX_HOST_CHANNEL_FN_EVENT_WAIT 6 /* Blocking wait for a host event. */
62#define VBOX_HOST_CHANNEL_FN_EVENT_CANCEL 7 /* Cancel the blocking wait. */
63#define VBOX_HOST_CHANNEL_FN_QUERY 8 /* Generic data exchange using a channel name. */
64
65/*
66 * The host event ids for the guest.
67 */
68#define VBOX_HOST_CHANNEL_EVENT_CANCELLED 0 /* Event was cancelled by FN_EVENT_CANCEL. */
69#define VBOX_HOST_CHANNEL_EVENT_UNREGISTERED 1 /* Channel was unregistered on host. */
70#define VBOX_HOST_CHANNEL_EVENT_RECV 2 /* Data is available for receiving. */
71#define VBOX_HOST_CHANNEL_EVENT_USER 1000 /* Base of channel specific events. */
72
73/*
74 * The common control code ids for the VBOX_HOST_CHANNEL_FN_[CONTROL|QUERY]
75 */
76#define VBOX_HOST_CHANNEL_CTRL_EXISTS 0 /* Whether the channel instance or provider exists. */
77#define VBOX_HOST_CHANNEL_CTRL_USER 1000 /* Base of channel specific events. */
78
79#pragma pack(1)
80
81/* Parameter of VBOX_HOST_CHANNEL_EVENT_RECV */
82typedef struct VBOXHOSTCHANNELEVENTRECV
83{
84 uint32_t u32SizeAvailable; /* How many bytes can be read from the channel. */
85} VBOXHOSTCHANNELEVENTRECV;
86
87/*
88 * Guest calls.
89 */
90
91typedef struct VBoxHostChannelAttach
92{
93 VBGLIOCHGCMCALL hdr;
94 HGCMFunctionParameter name; /* IN linear ptr: Channel name utf8 nul terminated. */
95 HGCMFunctionParameter flags; /* IN uint32_t: Channel specific flags. */
96 HGCMFunctionParameter handle; /* OUT uint32_t: The channel handle. */
97} VBoxHostChannelAttach;
98
99typedef struct VBoxHostChannelDetach
100{
101 VBGLIOCHGCMCALL hdr;
102 HGCMFunctionParameter handle; /* IN uint32_t: The channel handle. */
103} VBoxHostChannelDetach;
104
105typedef struct VBoxHostChannelSend
106{
107 VBGLIOCHGCMCALL hdr;
108 HGCMFunctionParameter handle; /* IN uint32_t: The channel handle. */
109 HGCMFunctionParameter data; /* IN linear pointer: Data to be sent. */
110} VBoxHostChannelSend;
111
112typedef struct VBoxHostChannelRecv
113{
114 VBGLIOCHGCMCALL hdr;
115 HGCMFunctionParameter handle; /* IN uint32_t: The channel handle. */
116 HGCMFunctionParameter data; /* OUT linear pointer: Buffer for data to be received. */
117 HGCMFunctionParameter sizeReceived; /* OUT uint32_t: Bytes received. */
118 HGCMFunctionParameter sizeRemaining; /* OUT uint32_t: Bytes remaining in the channel. */
119} VBoxHostChannelRecv;
120
121typedef struct VBoxHostChannelControl
122{
123 VBGLIOCHGCMCALL hdr;
124 HGCMFunctionParameter handle; /* IN uint32_t: The channel handle. */
125 HGCMFunctionParameter code; /* IN uint32_t: The channel specific control code. */
126 HGCMFunctionParameter parm; /* IN linear pointer: Parameters of the function. */
127 HGCMFunctionParameter data; /* OUT linear pointer: Buffer for results. */
128 HGCMFunctionParameter sizeDataReturned; /* OUT uint32_t: Bytes returned in the 'data' buffer. */
129} VBoxHostChannelControl;
130
131typedef struct VBoxHostChannelEventWait
132{
133 VBGLIOCHGCMCALL hdr;
134 HGCMFunctionParameter handle; /* OUT uint32_t: The channel which generated the event. */
135 HGCMFunctionParameter id; /* OUT uint32_t: The event VBOX_HOST_CHANNEL_EVENT_*. */
136 HGCMFunctionParameter parm; /* OUT linear pointer: Parameters of the event. */
137 HGCMFunctionParameter sizeReturned; /* OUT uint32_t: Size of the parameters. */
138} VBoxHostChannelEventWait;
139
140typedef struct VBoxHostChannelEventCancel
141{
142 VBGLIOCHGCMCALL hdr;
143} VBoxHostChannelEventCancel;
144
145typedef struct VBoxHostChannelQuery
146{
147 VBGLIOCHGCMCALL hdr;
148 HGCMFunctionParameter name; /* IN linear ptr: Channel name utf8 nul terminated. */
149 HGCMFunctionParameter code; /* IN uint32_t: The control code. */
150 HGCMFunctionParameter parm; /* IN linear pointer: Parameters of the function. */
151 HGCMFunctionParameter data; /* OUT linear pointer: Buffer for results. */
152 HGCMFunctionParameter sizeDataReturned; /* OUT uint32_t: Bytes returned in the 'data' buffer. */
153} VBoxHostChannelQuery;
154
155
156/*
157 * Host calls
158 */
159
160typedef struct VBoxHostChannelHostRegister
161{
162 VBOXHGCMSVCPARM name; /* IN ptr: Channel name utf8 nul terminated. */
163 VBOXHGCMSVCPARM iface; /* IN ptr: VBOXHOSTCHANNELINTERFACE. */
164} VBoxHostChannelHostRegister;
165
166typedef struct VBoxHostChannelHostUnregister
167{
168 VBOXHGCMSVCPARM name; /* IN ptr: Channel name utf8 nul terminated */
169} VBoxHostChannelHostUnregister;
170
171/* The channel provider will invoke this callback to report channel events. */
172typedef struct VBOXHOSTCHANNELCALLBACKS
173{
174 /* A channel event occured.
175 *
176 * @param pvCallbacks The callback context specified in HostChannelAttach.
177 * @param pvChannel The channel instance returned by HostChannelAttach.
178 * @param u32Id The event id.
179 * @param pvEvent The event parameters.
180 * @param cbEvent The size of event parameters.
181 */
182 DECLR3CALLBACKMEMBER(void, HostChannelCallbackEvent, (void *pvCallbacks, void *pvChannel,
183 uint32_t u32Id, const void *pvEvent, uint32_t cbEvent));
184
185 /* The channel has been deleted by the provider. pvCallback will not be used anymore.
186 *
187 * @param pvCallbacks The callback context specified in HostChannelAttach.
188 * @param pvChannel The channel instance returned by HostChannelAttach.
189 */
190 DECLR3CALLBACKMEMBER(void, HostChannelCallbackDeleted, (void *pvCallbacks, void *pvChannel));
191} VBOXHOSTCHANNELCALLBACKS;
192
193typedef struct VBOXHOSTCHANNELINTERFACE
194{
195 /* The channel provider context. */
196 void *pvProvider;
197
198 /* A new channel is requested.
199 *
200 * @param pvProvider The provider context VBOXHOSTCHANNELINTERFACE::pvProvider.
201 * @param ppvChannel Where to store pointer to the channel instance created by the provider.
202 * @param u32Flags Channel specific flags.
203 * @param pCallbacks Callbacks to be invoked by the channel provider.
204 * @param pvCallbacks The context of callbacks.
205 */
206 DECLR3CALLBACKMEMBER(int, HostChannelAttach, (void *pvProvider, void **ppvChannel, uint32_t u32Flags,
207 VBOXHOSTCHANNELCALLBACKS *pCallbacks, void *pvCallbacks));
208
209 /* The channel is closed. */
210 DECLR3CALLBACKMEMBER(void, HostChannelDetach, (void *pvChannel));
211
212 /* The guest sends data to the channel. */
213 DECLR3CALLBACKMEMBER(int, HostChannelSend, (void *pvChannel, const void *pvData, uint32_t cbData));
214
215 /* The guest reads data from the channel. */
216 DECLR3CALLBACKMEMBER(int, HostChannelRecv, (void *pvChannel, void *pvData, uint32_t cbData,
217 uint32_t *pcbReceived, uint32_t *pcbRemaining));
218
219 /* The guest talks to the provider of the channel.
220 * @param pvChannel The channel instance. NULL if the target is the provider, rather than a channel.
221 */
222 DECLR3CALLBACKMEMBER(int, HostChannelControl, (void *pvChannel, uint32_t u32Code,
223 const void *pvParm, uint32_t cbParm,
224 const void *pvData, uint32_t cbData, uint32_t *pcbDataReturned));
225} VBOXHOSTCHANNELINTERFACE;
226
227#pragma pack()
228
229#endif /* !VBOX_INCLUDED_HostServices_VBoxHostChannel_h */
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