1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
/**
* FreeRDP: A Remote Desktop Protocol Implementation
* Echo Virtual Channel Extension
*
* Copyright 2013 Christian Hofstaedtler
* Copyright 2015 Thincast Technologies GmbH
* Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <freerdp/config.h>
#include <stdio.h>
#include <stdlib.h>
#include <winpr/crt.h>
#include <winpr/assert.h>
#include <winpr/stream.h>
#include "echo_main.h"
#include <freerdp/client/channels.h>
#include <freerdp/channels/log.h>
#include <freerdp/channels/echo.h>
#define TAG CHANNELS_TAG("echo.client")
typedef struct
{
GENERIC_DYNVC_PLUGIN baseDynPlugin;
} ECHO_PLUGIN;
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT echo_on_data_received(IWTSVirtualChannelCallback* pChannelCallback, wStream* data)
{
GENERIC_CHANNEL_CALLBACK* callback = (GENERIC_CHANNEL_CALLBACK*)pChannelCallback;
const BYTE* pBuffer = Stream_ConstPointer(data);
const size_t cbSize = Stream_GetRemainingLength(data);
WINPR_ASSERT(callback);
WINPR_ASSERT(callback->channel);
WINPR_ASSERT(callback->channel->Write);
if (cbSize > UINT32_MAX)
return ERROR_INVALID_PARAMETER;
/* echo back what we have received. ECHO does not have any message IDs. */
return callback->channel->Write(callback->channel, (ULONG)cbSize, pBuffer, NULL);
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT echo_on_close(IWTSVirtualChannelCallback* pChannelCallback)
{
GENERIC_CHANNEL_CALLBACK* callback = (GENERIC_CHANNEL_CALLBACK*)pChannelCallback;
free(callback);
return CHANNEL_RC_OK;
}
static const IWTSVirtualChannelCallback echo_callbacks = { echo_on_data_received, NULL, /* Open */
echo_on_close, NULL };
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
FREERDP_ENTRY_POINT(UINT echo_DVCPluginEntry(IDRDYNVC_ENTRY_POINTS* pEntryPoints))
{
return freerdp_generic_DVCPluginEntry(pEntryPoints, TAG, ECHO_DVC_CHANNEL_NAME,
sizeof(ECHO_PLUGIN), sizeof(GENERIC_CHANNEL_CALLBACK),
&echo_callbacks, NULL, NULL);
}
|
