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/**
* FreeRDP: A Remote Desktop Protocol Implementation
* Advanced Input Virtual Channel Extension
*
* Copyright 2022 Armin Novak <anovak@thincast.com>
* Copyright 2022 Thincast Technologies GmbH
*
* 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 <winpr/sysinfo.h>
#include "ainput_main.h"
#include <freerdp/channels/log.h>
#include <freerdp/client/channels.h>
#include <freerdp/client/ainput.h>
#include <freerdp/channels/ainput.h>
#include "../common/ainput_common.h"
#define TAG CHANNELS_TAG("ainput.client")
typedef struct AINPUT_PLUGIN_ AINPUT_PLUGIN;
struct AINPUT_PLUGIN_
{
GENERIC_DYNVC_PLUGIN base;
AInputClientContext* context;
UINT32 MajorVersion;
UINT32 MinorVersion;
};
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT ainput_on_data_received(IWTSVirtualChannelCallback* pChannelCallback, wStream* data)
{
UINT16 type = 0;
AINPUT_PLUGIN* ainput = NULL;
GENERIC_CHANNEL_CALLBACK* callback = (GENERIC_CHANNEL_CALLBACK*)pChannelCallback;
WINPR_ASSERT(callback);
WINPR_ASSERT(data);
ainput = (AINPUT_PLUGIN*)callback->plugin;
WINPR_ASSERT(ainput);
if (!Stream_CheckAndLogRequiredLength(TAG, data, 2))
return ERROR_NO_DATA;
Stream_Read_UINT16(data, type);
switch (type)
{
case MSG_AINPUT_VERSION:
if (!Stream_CheckAndLogRequiredLength(TAG, data, 8))
return ERROR_NO_DATA;
Stream_Read_UINT32(data, ainput->MajorVersion);
Stream_Read_UINT32(data, ainput->MinorVersion);
break;
default:
WLog_WARN(TAG, "Received unsupported message type 0x%04" PRIx16, type);
break;
}
return CHANNEL_RC_OK;
}
static UINT ainput_send_input_event(AInputClientContext* context, UINT64 flags, INT32 x, INT32 y)
{
AINPUT_PLUGIN* ainput = NULL;
GENERIC_CHANNEL_CALLBACK* callback = NULL;
BYTE buffer[32] = { 0 };
UINT64 time = 0;
wStream sbuffer = { 0 };
wStream* s = Stream_StaticInit(&sbuffer, buffer, sizeof(buffer));
WINPR_ASSERT(s);
WINPR_ASSERT(context);
time = GetTickCount64();
ainput = (AINPUT_PLUGIN*)context->handle;
WINPR_ASSERT(ainput);
if (ainput->MajorVersion != AINPUT_VERSION_MAJOR)
{
WLog_WARN(TAG, "Unsupported channel version %" PRIu32 ".%" PRIu32 ", aborting.",
ainput->MajorVersion, ainput->MinorVersion);
return CHANNEL_RC_UNSUPPORTED_VERSION;
}
callback = ainput->base.listener_callback->channel_callback;
WINPR_ASSERT(callback);
{
char ebuffer[128] = { 0 };
WLog_VRB(TAG, "sending timestamp=0x%08" PRIx64 ", flags=%s, %" PRId32 "x%" PRId32, time,
ainput_flags_to_string(flags, ebuffer, sizeof(ebuffer)), x, y);
}
/* Message type */
Stream_Write_UINT16(s, MSG_AINPUT_MOUSE);
/* Event data */
Stream_Write_UINT64(s, time);
Stream_Write_UINT64(s, flags);
Stream_Write_INT32(s, x);
Stream_Write_INT32(s, y);
Stream_SealLength(s);
/* ainput back what we have received. AINPUT does not have any message IDs. */
WINPR_ASSERT(callback->channel);
WINPR_ASSERT(callback->channel->Write);
return callback->channel->Write(callback->channel, (ULONG)Stream_Length(s), Stream_Buffer(s),
NULL);
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT ainput_on_close(IWTSVirtualChannelCallback* pChannelCallback)
{
GENERIC_CHANNEL_CALLBACK* callback = (GENERIC_CHANNEL_CALLBACK*)pChannelCallback;
free(callback);
return CHANNEL_RC_OK;
}
static UINT init_plugin_cb(GENERIC_DYNVC_PLUGIN* base, rdpContext* rcontext, rdpSettings* settings)
{
AINPUT_PLUGIN* ainput = (AINPUT_PLUGIN*)base;
AInputClientContext* context = (AInputClientContext*)calloc(1, sizeof(AInputClientContext));
if (!context)
return CHANNEL_RC_NO_MEMORY;
context->handle = (void*)base;
context->AInputSendInputEvent = ainput_send_input_event;
ainput->context = context;
ainput->base.iface.pInterface = context;
return CHANNEL_RC_OK;
}
static void terminate_plugin_cb(GENERIC_DYNVC_PLUGIN* base)
{
AINPUT_PLUGIN* ainput = (AINPUT_PLUGIN*)base;
free(ainput->context);
}
static const IWTSVirtualChannelCallback ainput_functions = { ainput_on_data_received,
NULL, /* Open */
ainput_on_close, NULL };
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
FREERDP_ENTRY_POINT(UINT ainput_DVCPluginEntry(IDRDYNVC_ENTRY_POINTS* pEntryPoints))
{
return freerdp_generic_DVCPluginEntry(pEntryPoints, TAG, AINPUT_DVC_CHANNEL_NAME,
sizeof(AINPUT_PLUGIN), sizeof(GENERIC_CHANNEL_CALLBACK),
&ainput_functions, init_plugin_cb, terminate_plugin_cb);
}
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