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freerdp/channels/rdpei/client/rdpei_main.c

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/**
* FreeRDP: A Remote Desktop Protocol Implementation
* Input Virtual Channel Extension
*
* Copyright 2013 Marc-Andre Moreau <marcandre.moreau@gmail.com>
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winpr/crt.h>
#include <winpr/synch.h>
#include <winpr/thread.h>
#include <winpr/stream.h>
#include <winpr/sysinfo.h>
#include <winpr/cmdline.h>
#include <winpr/collections.h>
#include <freerdp/addin.h>
#include <freerdp/freerdp.h>
#include "rdpei_common.h"
#include "rdpei_main.h"
/**
* Touch Input
* http://msdn.microsoft.com/en-us/library/windows/desktop/dd562197/
*
* Windows Touch Input
* http://msdn.microsoft.com/en-us/library/windows/desktop/dd317321/
*
* Input: Touch injection sample
* http://code.msdn.microsoft.com/windowsdesktop/Touch-Injection-Sample-444d9bf7
*
* Pointer Input Message Reference
* http://msdn.microsoft.com/en-us/library/hh454916/
*
* POINTER_INFO Structure
* http://msdn.microsoft.com/en-us/library/hh454907/
*
* POINTER_TOUCH_INFO Structure
* http://msdn.microsoft.com/en-us/library/hh454910/
*/
#define MAX_CONTACTS 64
#define MAX_PEN_CONTACTS 4
struct _RDPEI_CHANNEL_CALLBACK
{
IWTSVirtualChannelCallback iface;
IWTSPlugin* plugin;
IWTSVirtualChannelManager* channel_mgr;
IWTSVirtualChannel* channel;
};
typedef struct _RDPEI_CHANNEL_CALLBACK RDPEI_CHANNEL_CALLBACK;
struct _RDPEI_LISTENER_CALLBACK
{
IWTSListenerCallback iface;
IWTSPlugin* plugin;
IWTSVirtualChannelManager* channel_mgr;
RDPEI_CHANNEL_CALLBACK* channel_callback;
};
typedef struct _RDPEI_LISTENER_CALLBACK RDPEI_LISTENER_CALLBACK;
struct _RDPEI_PLUGIN
{
IWTSPlugin iface;
IWTSListener* listener;
RDPEI_LISTENER_CALLBACK* listener_callback;
RdpeiClientContext* context;
UINT32 version;
UINT32 features;
UINT16 maxTouchContacts;
UINT64 currentFrameTime;
UINT64 previousFrameTime;
RDPINPUT_CONTACT_POINT contactPoints[MAX_CONTACTS];
UINT64 currentPenFrameTime;
UINT64 previousPenFrameTime;
UINT16 maxPenContacts;
RDPINPUT_PEN_CONTACT_POINT penContactPoints[MAX_PEN_CONTACTS];
CRITICAL_SECTION lock;
rdpContext* rdpcontext;
BOOL initialized;
HANDLE thread;
HANDLE event;
};
typedef struct _RDPEI_PLUGIN RDPEI_PLUGIN;
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_send_frame(RdpeiClientContext* context, RDPINPUT_TOUCH_FRAME* frame);
#ifdef WITH_DEBUG_RDPEI
static const char* rdpei_eventid_string(UINT16 event)
{
switch (event)
{
case EVENTID_SC_READY:
return "EVENTID_SC_READY";
case EVENTID_CS_READY:
return "EVENTID_CS_READY";
case EVENTID_TOUCH:
return "EVENTID_TOUCH";
case EVENTID_SUSPEND_TOUCH:
return "EVENTID_SUSPEND_TOUCH";
case EVENTID_RESUME_TOUCH:
return "EVENTID_RESUME_TOUCH";
case EVENTID_DISMISS_HOVERING_CONTACT:
return "EVENTID_DISMISS_HOVERING_CONTACT";
case EVENTID_PEN:
return "EVENTID_PEN";
default:
return "EVENTID_UNKNOWN";
}
}
#endif
static RDPINPUT_CONTACT_POINT* rdpei_contact(RDPEI_PLUGIN* rdpei, INT32 externalId, BOOL active)
{
UINT16 i;
for (i = 0; i < rdpei->maxTouchContacts; i++)
{
RDPINPUT_CONTACT_POINT* contactPoint = &rdpei->contactPoints[i];
if (!contactPoint->active && active)
continue;
else if (!contactPoint->active && !active)
{
contactPoint->contactId = i;
contactPoint->externalId = externalId;
contactPoint->active = TRUE;
return contactPoint;
}
else if (contactPoint->externalId == externalId)
{
return contactPoint;
}
}
return NULL;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_add_frame(RdpeiClientContext* context)
{
UINT16 i;
RDPEI_PLUGIN* rdpei;
RDPINPUT_TOUCH_FRAME frame = { 0 };
RDPINPUT_CONTACT_DATA contacts[MAX_CONTACTS] = { 0 };
if (!context || !context->handle)
return ERROR_INTERNAL_ERROR;
rdpei = (RDPEI_PLUGIN*)context->handle;
frame.contacts = contacts;
for (i = 0; i < rdpei->maxTouchContacts; i++)
{
RDPINPUT_CONTACT_POINT* contactPoint = &rdpei->contactPoints[i];
RDPINPUT_CONTACT_DATA* contact = &contactPoint->data;
if (contactPoint->dirty)
{
contacts[frame.contactCount] = *contact;
rdpei->contactPoints[i].dirty = FALSE;
frame.contactCount++;
}
else if (contactPoint->active)
{
if (contact->contactFlags & CONTACT_FLAG_DOWN)
{
contact->contactFlags = CONTACT_FLAG_UPDATE;
contact->contactFlags |= CONTACT_FLAG_INRANGE;
contact->contactFlags |= CONTACT_FLAG_INCONTACT;
}
contacts[frame.contactCount] = *contact;
frame.contactCount++;
}
if (contact->contactFlags & CONTACT_FLAG_UP)
{
contactPoint->active = FALSE;
contactPoint->externalId = 0;
contactPoint->contactId = 0;
}
}
if (frame.contactCount > 0)
{
UINT error = rdpei_send_frame(context, &frame);
if (error != CHANNEL_RC_OK)
{
WLog_ERR(TAG, "rdpei_send_frame failed with error %" PRIu32 "!", error);
return error;
}
}
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_send_pdu(RDPEI_CHANNEL_CALLBACK* callback, wStream* s, UINT16 eventId,
UINT32 pduLength)
{
UINT status;
if (!callback || !s || !callback->channel || !callback->channel->Write)
return ERROR_INTERNAL_ERROR;
Stream_SetPosition(s, 0);
Stream_Write_UINT16(s, eventId); /* eventId (2 bytes) */
Stream_Write_UINT32(s, pduLength); /* pduLength (4 bytes) */
Stream_SetPosition(s, Stream_Length(s));
status = callback->channel->Write(callback->channel, (UINT32)Stream_Length(s), Stream_Buffer(s),
NULL);
#ifdef WITH_DEBUG_RDPEI
WLog_DBG(TAG,
"rdpei_send_pdu: eventId: %" PRIu16 " (%s) length: %" PRIu32 " status: %" PRIu32 "",
eventId, rdpei_eventid_string(eventId), pduLength, status);
#endif
return status;
}
static UINT rdpei_write_pen_frame(wStream* s, const RDPINPUT_PEN_FRAME* frame)
{
UINT16 x;
if (!s || !frame)
return ERROR_INTERNAL_ERROR;
if (!rdpei_write_2byte_unsigned(s, frame->contactCount))
return ERROR_OUTOFMEMORY;
if (!rdpei_write_8byte_unsigned(s, frame->frameOffset))
return ERROR_OUTOFMEMORY;
for (x = 0; x < frame->contactCount; x++)
{
const RDPINPUT_PEN_CONTACT* contact = &frame->contacts[x];
if (!Stream_EnsureRemainingCapacity(s, 1))
return ERROR_OUTOFMEMORY;
Stream_Write_UINT8(s, contact->deviceId);
if (!rdpei_write_2byte_unsigned(s, contact->fieldsPresent))
return ERROR_OUTOFMEMORY;
if (!rdpei_write_4byte_signed(s, contact->x))
return ERROR_OUTOFMEMORY;
if (!rdpei_write_4byte_signed(s, contact->y))
return ERROR_OUTOFMEMORY;
if (!rdpei_write_4byte_unsigned(s, contact->contactFlags))
return ERROR_OUTOFMEMORY;
if (contact->fieldsPresent & PEN_CONTACT_PENFLAGS_PRESENT)
{
if (!rdpei_write_4byte_unsigned(s, contact->penFlags))
return ERROR_OUTOFMEMORY;
}
if (contact->fieldsPresent & PEN_CONTACT_PRESSURE_PRESENT)
{
if (!rdpei_write_4byte_unsigned(s, contact->pressure))
return ERROR_OUTOFMEMORY;
}
if (contact->fieldsPresent & PEN_CONTACT_ROTATION_PRESENT)
{
if (!rdpei_write_2byte_unsigned(s, contact->rotation))
return ERROR_OUTOFMEMORY;
}
if (contact->fieldsPresent & PEN_CONTACT_TILTX_PRESENT)
{
if (!rdpei_write_2byte_signed(s, contact->tiltX))
return ERROR_OUTOFMEMORY;
}
if (contact->fieldsPresent & PEN_CONTACT_TILTY_PRESENT)
{
if (!rdpei_write_2byte_signed(s, contact->tiltY))
return ERROR_OUTOFMEMORY;
}
}
return CHANNEL_RC_OK;
}
static UINT rdpei_send_pen_event_pdu(RDPEI_CHANNEL_CALLBACK* callback, UINT32 frameOffset,
const RDPINPUT_PEN_FRAME* frames, UINT16 count)
{
UINT status;
wStream* s;
UINT16 x;
if (!frames || (count == 0))
return ERROR_INTERNAL_ERROR;
s = Stream_New(NULL, 64);
if (!s)
{
WLog_ERR(TAG, "Stream_New failed!");
return CHANNEL_RC_NO_MEMORY;
}
Stream_Seek(s, RDPINPUT_HEADER_LENGTH);
/**
* the time that has elapsed (in milliseconds) from when the oldest touch frame
* was generated to when it was encoded for transmission by the client.
*/
rdpei_write_4byte_unsigned(s, frameOffset); /* encodeTime (FOUR_BYTE_UNSIGNED_INTEGER) */
rdpei_write_2byte_unsigned(s, count); /* (frameCount) TWO_BYTE_UNSIGNED_INTEGER */
for (x = 0; x < count; x++)
{
if ((status = rdpei_write_pen_frame(s, &frames[x])))
{
WLog_ERR(TAG, "rdpei_write_touch_frame failed with error %" PRIu32 "!", status);
Stream_Free(s, TRUE);
return status;
}
}
Stream_SealLength(s);
status = rdpei_send_pdu(callback, s, EVENTID_PEN, Stream_Length(s));
Stream_Free(s, TRUE);
return status;
}
static UINT rdpei_send_pen_frame(RdpeiClientContext* context, RDPINPUT_PEN_FRAME* frame)
{
const UINT64 currentTime = GetTickCount64();
RDPEI_PLUGIN* rdpei;
RDPEI_CHANNEL_CALLBACK* callback;
UINT error;
if (!context)
return ERROR_INTERNAL_ERROR;
rdpei = (RDPEI_PLUGIN*)context->handle;
if (!rdpei || !rdpei->listener_callback)
return ERROR_INTERNAL_ERROR;
callback = rdpei->listener_callback->channel_callback;
if (!rdpei->previousPenFrameTime && !rdpei->currentPenFrameTime)
{
rdpei->currentPenFrameTime = currentTime;
frame->frameOffset = 0;
}
else
{
rdpei->currentPenFrameTime = currentTime;
frame->frameOffset = rdpei->currentPenFrameTime - rdpei->previousPenFrameTime;
}
if ((error = rdpei_send_pen_event_pdu(callback, frame->frameOffset, frame, 1)))
return error;
rdpei->previousPenFrameTime = rdpei->currentPenFrameTime;
return error;
}
static UINT rdpei_add_pen_frame(RdpeiClientContext* context)
{
UINT16 i;
RDPEI_PLUGIN* rdpei;
RDPINPUT_PEN_FRAME penFrame = { 0 };
RDPINPUT_PEN_CONTACT penContacts[MAX_PEN_CONTACTS] = { 0 };
if (!context || !context->handle)
return ERROR_INTERNAL_ERROR;
rdpei = (RDPEI_PLUGIN*)context->handle;
penFrame.contacts = penContacts;
for (i = 0; i < rdpei->maxPenContacts; i++)
{
RDPINPUT_PEN_CONTACT_POINT* contact = &(rdpei->penContactPoints[i]);
if (contact->dirty)
{
penContacts[penFrame.contactCount++] = contact->data;
contact->dirty = FALSE;
}
else if (contact->active)
{
if (contact->data.contactFlags & CONTACT_FLAG_DOWN)
{
contact->data.contactFlags = CONTACT_FLAG_UPDATE;
contact->data.contactFlags |= CONTACT_FLAG_INRANGE;
contact->data.contactFlags |= CONTACT_FLAG_INCONTACT;
}
penContacts[penFrame.contactCount++] = contact->data;
}
if (contact->data.contactFlags & CONTACT_FLAG_UP)
{
contact->externalId = 0;
contact->active = FALSE;
}
}
if (penFrame.contactCount > 0)
return rdpei_send_pen_frame(context, &penFrame);
return CHANNEL_RC_OK;
}
static UINT rdpei_update(RdpeiClientContext* context)
{
UINT error = rdpei_add_frame(context);
if (error != CHANNEL_RC_OK)
{
WLog_ERR(TAG, "rdpei_add_frame failed with error %" PRIu32 "!", error);
return error;
}
return rdpei_add_pen_frame(context);
}
static DWORD WINAPI rdpei_periodic_update(LPVOID arg)
{
DWORD status;
RDPEI_PLUGIN* rdpei = (RDPEI_PLUGIN*)arg;
UINT error = CHANNEL_RC_OK;
RdpeiClientContext* context;
if (!rdpei)
{
error = ERROR_INVALID_PARAMETER;
goto out;
}
context = (RdpeiClientContext*)rdpei->iface.pInterface;
if (!context)
{
error = ERROR_INVALID_PARAMETER;
goto out;
}
while (rdpei->initialized)
{
status = WaitForSingleObject(rdpei->event, 20);
if (status == WAIT_FAILED)
{
error = GetLastError();
WLog_ERR(TAG, "WaitForMultipleObjects failed with error %" PRIu32 "!", error);
break;
}
EnterCriticalSection(&rdpei->lock);
error = rdpei_update(context);
if (error != CHANNEL_RC_OK)
{
WLog_ERR(TAG, "rdpei_add_frame failed with error %" PRIu32 "!", error);
break;
}
if (status == WAIT_OBJECT_0)
ResetEvent(rdpei->event);
LeaveCriticalSection(&rdpei->lock);
}
out:
if (error && rdpei && rdpei->rdpcontext)
setChannelError(rdpei->rdpcontext, error, "rdpei_schedule_thread reported an error");
ExitThread(error);
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_send_cs_ready_pdu(RDPEI_CHANNEL_CALLBACK* callback)
{
UINT status;
wStream* s;
UINT32 flags;
UINT32 pduLength;
RDPEI_PLUGIN* rdpei;
if (!callback || !callback->plugin)
return ERROR_INTERNAL_ERROR;
rdpei = (RDPEI_PLUGIN*)callback->plugin;
flags = 0;
flags |= CS_READY_FLAGS_SHOW_TOUCH_VISUALS;
if (rdpei->version > RDPINPUT_PROTOCOL_V10)
flags |= CS_READY_FLAGS_DISABLE_TIMESTAMP_INJECTION;
flags |= CS_READY_FLAGS_ENABLE_MULTIPEN_INJECTION;
pduLength = RDPINPUT_HEADER_LENGTH + 10;
s = Stream_New(NULL, pduLength);
if (!s)
{
WLog_ERR(TAG, "Stream_New failed!");
return CHANNEL_RC_NO_MEMORY;
}
Stream_Seek(s, RDPINPUT_HEADER_LENGTH);
Stream_Write_UINT32(s, flags); /* flags (4 bytes) */
Stream_Write_UINT32(s, rdpei->version); /* protocolVersion (4 bytes) */
Stream_Write_UINT16(s, rdpei->maxTouchContacts); /* maxTouchContacts (2 bytes) */
Stream_SealLength(s);
status = rdpei_send_pdu(callback, s, EVENTID_CS_READY, pduLength);
Stream_Free(s, TRUE);
return status;
}
static void rdpei_print_contact_flags(UINT32 contactFlags)
{
if (contactFlags & CONTACT_FLAG_DOWN)
WLog_DBG(TAG, " CONTACT_FLAG_DOWN");
if (contactFlags & CONTACT_FLAG_UPDATE)
WLog_DBG(TAG, " CONTACT_FLAG_UPDATE");
if (contactFlags & CONTACT_FLAG_UP)
WLog_DBG(TAG, " CONTACT_FLAG_UP");
if (contactFlags & CONTACT_FLAG_INRANGE)
WLog_DBG(TAG, " CONTACT_FLAG_INRANGE");
if (contactFlags & CONTACT_FLAG_INCONTACT)
WLog_DBG(TAG, " CONTACT_FLAG_INCONTACT");
if (contactFlags & CONTACT_FLAG_CANCELED)
WLog_DBG(TAG, " CONTACT_FLAG_CANCELED");
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_write_touch_frame(wStream* s, RDPINPUT_TOUCH_FRAME* frame)
{
UINT32 index;
int rectSize = 2;
RDPINPUT_CONTACT_DATA* contact;
if (!s || !frame)
return ERROR_INTERNAL_ERROR;
#ifdef WITH_DEBUG_RDPEI
WLog_DBG(TAG, "contactCount: %" PRIu32 "", frame->contactCount);
WLog_DBG(TAG, "frameOffset: 0x%016" PRIX64 "", frame->frameOffset);
#endif
rdpei_write_2byte_unsigned(s,
frame->contactCount); /* contactCount (TWO_BYTE_UNSIGNED_INTEGER) */
/**
* the time offset from the previous frame (in microseconds).
* If this is the first frame being transmitted then this field MUST be set to zero.
*/
rdpei_write_8byte_unsigned(s, frame->frameOffset *
1000); /* frameOffset (EIGHT_BYTE_UNSIGNED_INTEGER) */
if (!Stream_EnsureRemainingCapacity(s, (size_t)frame->contactCount * 64))
{
WLog_ERR(TAG, "Stream_EnsureRemainingCapacity failed!");
return CHANNEL_RC_NO_MEMORY;
}
for (index = 0; index < frame->contactCount; index++)
{
contact = &frame->contacts[index];
contact->fieldsPresent |= CONTACT_DATA_CONTACTRECT_PRESENT;
contact->contactRectLeft = contact->x - rectSize;
contact->contactRectTop = contact->y - rectSize;
contact->contactRectRight = contact->x + rectSize;
contact->contactRectBottom = contact->y + rectSize;
#ifdef WITH_DEBUG_RDPEI
WLog_DBG(TAG, "contact[%" PRIu32 "].contactId: %" PRIu32 "", index, contact->contactId);
WLog_DBG(TAG, "contact[%" PRIu32 "].fieldsPresent: %" PRIu32 "", index,
contact->fieldsPresent);
WLog_DBG(TAG, "contact[%" PRIu32 "].x: %" PRId32 "", index, contact->x);
WLog_DBG(TAG, "contact[%" PRIu32 "].y: %" PRId32 "", index, contact->y);
WLog_DBG(TAG, "contact[%" PRIu32 "].contactFlags: 0x%08" PRIX32 "", index,
contact->contactFlags);
rdpei_print_contact_flags(contact->contactFlags);
#endif
Stream_Write_UINT8(s, contact->contactId); /* contactId (1 byte) */
/* fieldsPresent (TWO_BYTE_UNSIGNED_INTEGER) */
rdpei_write_2byte_unsigned(s, contact->fieldsPresent);
rdpei_write_4byte_signed(s, contact->x); /* x (FOUR_BYTE_SIGNED_INTEGER) */
rdpei_write_4byte_signed(s, contact->y); /* y (FOUR_BYTE_SIGNED_INTEGER) */
/* contactFlags (FOUR_BYTE_UNSIGNED_INTEGER) */
rdpei_write_4byte_unsigned(s, contact->contactFlags);
if (contact->fieldsPresent & CONTACT_DATA_CONTACTRECT_PRESENT)
{
/* contactRectLeft (TWO_BYTE_SIGNED_INTEGER) */
rdpei_write_2byte_signed(s, contact->contactRectLeft);
/* contactRectTop (TWO_BYTE_SIGNED_INTEGER) */
rdpei_write_2byte_signed(s, contact->contactRectTop);
/* contactRectRight (TWO_BYTE_SIGNED_INTEGER) */
rdpei_write_2byte_signed(s, contact->contactRectRight);
/* contactRectBottom (TWO_BYTE_SIGNED_INTEGER) */
rdpei_write_2byte_signed(s, contact->contactRectBottom);
}
if (contact->fieldsPresent & CONTACT_DATA_ORIENTATION_PRESENT)
{
/* orientation (FOUR_BYTE_UNSIGNED_INTEGER) */
rdpei_write_4byte_unsigned(s, contact->orientation);
}
if (contact->fieldsPresent & CONTACT_DATA_PRESSURE_PRESENT)
{
/* pressure (FOUR_BYTE_UNSIGNED_INTEGER) */
rdpei_write_4byte_unsigned(s, contact->pressure);
}
}
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_send_touch_event_pdu(RDPEI_CHANNEL_CALLBACK* callback,
RDPINPUT_TOUCH_FRAME* frame)
{
UINT status;
wStream* s;
UINT32 pduLength;
if (!frame)
return ERROR_INTERNAL_ERROR;
pduLength = 64 + (frame->contactCount * 64);
s = Stream_New(NULL, pduLength);
if (!s)
{
WLog_ERR(TAG, "Stream_New failed!");
return CHANNEL_RC_NO_MEMORY;
}
Stream_Seek(s, RDPINPUT_HEADER_LENGTH);
/**
* the time that has elapsed (in milliseconds) from when the oldest touch frame
* was generated to when it was encoded for transmission by the client.
*/
rdpei_write_4byte_unsigned(
s, (UINT32)frame->frameOffset); /* encodeTime (FOUR_BYTE_UNSIGNED_INTEGER) */
rdpei_write_2byte_unsigned(s, 1); /* (frameCount) TWO_BYTE_UNSIGNED_INTEGER */
if ((status = rdpei_write_touch_frame(s, frame)))
{
WLog_ERR(TAG, "rdpei_write_touch_frame failed with error %" PRIu32 "!", status);
Stream_Free(s, TRUE);
return status;
}
Stream_SealLength(s);
pduLength = Stream_Length(s);
status = rdpei_send_pdu(callback, s, EVENTID_TOUCH, pduLength);
Stream_Free(s, TRUE);
return status;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_recv_sc_ready_pdu(RDPEI_CHANNEL_CALLBACK* callback, wStream* s)
{
UINT32 features = 0;
UINT32 size;
UINT32 protocolVersion;
RDPEI_PLUGIN* rdpei;
if (!callback || !callback->plugin)
return ERROR_INTERNAL_ERROR;
rdpei = (RDPEI_PLUGIN*)callback->plugin;
size = Stream_GetRemainingLength(s);
if (size < 4)
return ERROR_INVALID_DATA;
Stream_Read_UINT32(s, protocolVersion); /* protocolVersion (4 bytes) */
if (protocolVersion >= RDPINPUT_PROTOCOL_V300)
{
if (size < 8)
return ERROR_INVALID_DATA;
}
if (size >= 9)
Stream_Read_UINT32(s, features);
if (rdpei->version > protocolVersion)
rdpei->version = protocolVersion;
rdpei->features = features;
#if 0
if (protocolVersion != RDPINPUT_PROTOCOL_V10)
{
WLog_ERR(TAG, "Unknown [MS-RDPEI] protocolVersion: 0x%08"PRIX32"", protocolVersion);
return -1;
}
#endif
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_recv_suspend_touch_pdu(RDPEI_CHANNEL_CALLBACK* callback, wStream* s)
{
UINT error = CHANNEL_RC_OK;
RdpeiClientContext* rdpei;
WINPR_UNUSED(s);
if (!callback || !callback->plugin)
return ERROR_INTERNAL_ERROR;
rdpei = (RdpeiClientContext*)callback->plugin->pInterface;
if (!rdpei)
return ERROR_INTERNAL_ERROR;
IFCALLRET(rdpei->SuspendTouch, error, rdpei);
if (error)
WLog_ERR(TAG, "rdpei->SuspendTouch failed with error %" PRIu32 "!", error);
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_recv_resume_touch_pdu(RDPEI_CHANNEL_CALLBACK* callback, wStream* s)
{
RdpeiClientContext* rdpei;
UINT error = CHANNEL_RC_OK;
if (!s || !callback || !callback->plugin)
return ERROR_INTERNAL_ERROR;
rdpei = (RdpeiClientContext*)callback->plugin->pInterface;
if (!rdpei)
return ERROR_INTERNAL_ERROR;
IFCALLRET(rdpei->ResumeTouch, error, rdpei);
if (error)
WLog_ERR(TAG, "rdpei->ResumeTouch failed with error %" PRIu32 "!", error);
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_recv_pdu(RDPEI_CHANNEL_CALLBACK* callback, wStream* s)
{
UINT16 eventId;
UINT32 pduLength;
UINT error;
if (!s)
return ERROR_INTERNAL_ERROR;
if (Stream_GetRemainingLength(s) < 6)
return ERROR_INVALID_DATA;
Stream_Read_UINT16(s, eventId); /* eventId (2 bytes) */
Stream_Read_UINT32(s, pduLength); /* pduLength (4 bytes) */
#ifdef WITH_DEBUG_RDPEI
WLog_DBG(TAG, "rdpei_recv_pdu: eventId: %" PRIu16 " (%s) length: %" PRIu32 "", eventId,
rdpei_eventid_string(eventId), pduLength);
#endif
switch (eventId)
{
case EVENTID_SC_READY:
if ((error = rdpei_recv_sc_ready_pdu(callback, s)))
{
WLog_ERR(TAG, "rdpei_recv_sc_ready_pdu failed with error %" PRIu32 "!", error);
return error;
}
if ((error = rdpei_send_cs_ready_pdu(callback)))
{
WLog_ERR(TAG, "rdpei_send_cs_ready_pdu failed with error %" PRIu32 "!", error);
return error;
}
break;
case EVENTID_SUSPEND_TOUCH:
if ((error = rdpei_recv_suspend_touch_pdu(callback, s)))
{
WLog_ERR(TAG, "rdpei_recv_suspend_touch_pdu failed with error %" PRIu32 "!", error);
return error;
}
break;
case EVENTID_RESUME_TOUCH:
if ((error = rdpei_recv_resume_touch_pdu(callback, s)))
{
WLog_ERR(TAG, "rdpei_recv_resume_touch_pdu failed with error %" PRIu32 "!", error);
return error;
}
break;
default:
break;
}
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_on_data_received(IWTSVirtualChannelCallback* pChannelCallback, wStream* data)
{
RDPEI_CHANNEL_CALLBACK* callback = (RDPEI_CHANNEL_CALLBACK*)pChannelCallback;
return rdpei_recv_pdu(callback, data);
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_on_close(IWTSVirtualChannelCallback* pChannelCallback)
{
RDPEI_CHANNEL_CALLBACK* callback = (RDPEI_CHANNEL_CALLBACK*)pChannelCallback;
free(callback);
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_on_new_channel_connection(IWTSListenerCallback* pListenerCallback,
IWTSVirtualChannel* pChannel, BYTE* Data,
BOOL* pbAccept, IWTSVirtualChannelCallback** ppCallback)
{
RDPEI_CHANNEL_CALLBACK* callback;
RDPEI_LISTENER_CALLBACK* listener_callback = (RDPEI_LISTENER_CALLBACK*)pListenerCallback;
if (!listener_callback)
return ERROR_INTERNAL_ERROR;
callback = (RDPEI_CHANNEL_CALLBACK*)calloc(1, sizeof(RDPEI_CHANNEL_CALLBACK));
WINPR_UNUSED(Data);
WINPR_UNUSED(pbAccept);
if (!callback)
{
WLog_ERR(TAG, "calloc failed!");
return CHANNEL_RC_NO_MEMORY;
}
callback->iface.OnDataReceived = rdpei_on_data_received;
callback->iface.OnClose = rdpei_on_close;
callback->plugin = listener_callback->plugin;
callback->channel_mgr = listener_callback->channel_mgr;
callback->channel = pChannel;
listener_callback->channel_callback = callback;
*ppCallback = (IWTSVirtualChannelCallback*)callback;
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_plugin_terminated(IWTSPlugin* pPlugin)
{
RDPEI_PLUGIN* rdpei = (RDPEI_PLUGIN*)pPlugin;
if (!pPlugin)
return ERROR_INVALID_PARAMETER;
if (rdpei && rdpei->listener_callback)
{
IWTSVirtualChannelManager* mgr = rdpei->listener_callback->channel_mgr;
if (mgr)
IFCALL(mgr->DestroyListener, mgr, rdpei->listener);
rdpei->initialized = FALSE;
if (rdpei->event)
SetEvent(rdpei->event);
if (rdpei->thread)
{
WaitForSingleObject(rdpei->thread, INFINITE);
CloseHandle(rdpei->thread);
}
if (rdpei->event)
CloseHandle(rdpei->event);
}
DeleteCriticalSection(&rdpei->lock);
free(rdpei->listener_callback);
free(rdpei->context);
free(rdpei);
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_plugin_initialize(IWTSPlugin* pPlugin, IWTSVirtualChannelManager* pChannelMgr)
{
UINT error;
RDPEI_PLUGIN* rdpei = (RDPEI_PLUGIN*)pPlugin;
if (rdpei->initialized)
{
WLog_ERR(TAG, "[%s] channel initialized twice, aborting", RDPEI_DVC_CHANNEL_NAME);
return ERROR_INVALID_DATA;
}
rdpei->listener_callback = (RDPEI_LISTENER_CALLBACK*)calloc(1, sizeof(RDPEI_LISTENER_CALLBACK));
if (!rdpei->listener_callback)
{
WLog_ERR(TAG, "calloc failed!");
return CHANNEL_RC_NO_MEMORY;
}
rdpei->listener_callback->iface.OnNewChannelConnection = rdpei_on_new_channel_connection;
rdpei->listener_callback->plugin = pPlugin;
rdpei->listener_callback->channel_mgr = pChannelMgr;
if ((error = pChannelMgr->CreateListener(pChannelMgr, RDPEI_DVC_CHANNEL_NAME, 0,
&rdpei->listener_callback->iface, &(rdpei->listener))))
{
WLog_ERR(TAG, "ChannelMgr->CreateListener failed with error %" PRIu32 "!", error);
goto error_out;
}
rdpei->listener->pInterface = rdpei->iface.pInterface;
InitializeCriticalSection(&rdpei->lock);
rdpei->event = CreateEventA(NULL, TRUE, FALSE, NULL);
if (!rdpei->event)
goto error_out;
rdpei->thread = CreateThread(NULL, 0, rdpei_periodic_update, rdpei, 0, NULL);
if (!rdpei->thread)
goto error_out;
rdpei->initialized = TRUE;
return error;
error_out:
rdpei_plugin_terminated(pPlugin);
return error;
}
/**
* Channel Client Interface
*/
static UINT32 rdpei_get_version(RdpeiClientContext* context)
{
RDPEI_PLUGIN* rdpei;
if (!context || !context->handle)
return -1;
rdpei = (RDPEI_PLUGIN*)context->handle;
return rdpei->version;
}
static UINT32 rdpei_get_features(RdpeiClientContext* context)
{
RDPEI_PLUGIN* rdpei;
if (!context || !context->handle)
return -1;
rdpei = (RDPEI_PLUGIN*)context->handle;
return rdpei->features;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
UINT rdpei_send_frame(RdpeiClientContext* context, RDPINPUT_TOUCH_FRAME* frame)
{
UINT64 currentTime;
RDPEI_PLUGIN* rdpei = (RDPEI_PLUGIN*)context->handle;
RDPEI_CHANNEL_CALLBACK* callback = rdpei->listener_callback->channel_callback;
UINT error;
currentTime = GetTickCount64();
if (!rdpei->previousFrameTime && !rdpei->currentFrameTime)
{
rdpei->currentFrameTime = currentTime;
frame->frameOffset = 0;
}
else
{
rdpei->currentFrameTime = currentTime;
frame->frameOffset = rdpei->currentFrameTime - rdpei->previousFrameTime;
}
if ((error = rdpei_send_touch_event_pdu(callback, frame)))
{
WLog_ERR(TAG, "rdpei_send_touch_event_pdu failed with error %" PRIu32 "!", error);
return error;
}
rdpei->previousFrameTime = rdpei->currentFrameTime;
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_add_contact(RdpeiClientContext* context, const RDPINPUT_CONTACT_DATA* contact)
{
RDPINPUT_CONTACT_POINT* contactPoint;
RDPEI_PLUGIN* rdpei;
if (!context || !contact || !context->handle)
return ERROR_INTERNAL_ERROR;
rdpei = (RDPEI_PLUGIN*)context->handle;
EnterCriticalSection(&rdpei->lock);
contactPoint = &rdpei->contactPoints[contact->contactId];
contactPoint->data = *contact;
contactPoint->dirty = TRUE;
SetEvent(rdpei->event);
LeaveCriticalSection(&rdpei->lock);
return CHANNEL_RC_OK;
}
static UINT rdpei_touch_process(RdpeiClientContext* context, INT32 externalId, UINT32 contactFlags,
INT32 x, INT32 y, INT32* contactId)
{
INT64 contactIdlocal = -1;
RDPINPUT_CONTACT_POINT* contactPoint;
RDPEI_PLUGIN* rdpei;
BOOL begin;
UINT error = CHANNEL_RC_OK;
if (!context || !contactId || !context->handle)
return ERROR_INTERNAL_ERROR;
rdpei = (RDPEI_PLUGIN*)context->handle;
/* Create a new contact point in an empty slot */
EnterCriticalSection(&rdpei->lock);
begin = contactFlags & CONTACT_FLAG_DOWN;
contactPoint = rdpei_contact(rdpei, externalId, !begin);
if (contactPoint)
contactIdlocal = contactPoint->contactId;
LeaveCriticalSection(&rdpei->lock);
if (contactIdlocal >= 0)
{
RDPINPUT_CONTACT_DATA contact = { 0 };
contact.x = x;
contact.y = y;
contact.contactId = contactIdlocal;
contact.contactFlags = contactFlags;
error = context->AddContact(context, &contact);
}
if (contactId)
*contactId = contactIdlocal;
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_touch_begin(RdpeiClientContext* context, INT32 externalId, INT32 x, INT32 y,
INT32* contactId)
{
return rdpei_touch_process(context, externalId,
CONTACT_FLAG_DOWN | CONTACT_FLAG_INRANGE | CONTACT_FLAG_INCONTACT, x,
y, contactId);
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_touch_update(RdpeiClientContext* context, INT32 externalId, INT32 x, INT32 y,
INT32* contactId)
{
return rdpei_touch_process(context, externalId,
CONTACT_FLAG_UPDATE | CONTACT_FLAG_INRANGE | CONTACT_FLAG_INCONTACT,
x, y, contactId);
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_touch_end(RdpeiClientContext* context, INT32 externalId, INT32 x, INT32 y,
INT32* contactId)
{
UINT error = rdpei_touch_process(
context, externalId, CONTACT_FLAG_UPDATE | CONTACT_FLAG_INRANGE | CONTACT_FLAG_INCONTACT, x,
y, contactId);
if (error != CHANNEL_RC_OK)
return error;
return rdpei_touch_process(context, externalId, CONTACT_FLAG_UP, x, y, contactId);
}
static RDPINPUT_PEN_CONTACT_POINT* rdpei_pen_contact(RDPEI_PLUGIN* rdpei, INT32 externalId,
BOOL active)
{
UINT32 x;
if (!rdpei)
return NULL;
for (x = 0; x < rdpei->maxPenContacts; x++)
{
RDPINPUT_PEN_CONTACT_POINT* contact = &rdpei->penContactPoints[x];
if (active)
{
if (contact->active)
{
if (contact->externalId == externalId)
return contact;
}
}
else
{
if (!contact->active)
{
contact->externalId = externalId;
contact->active = TRUE;
return contact;
}
}
}
return NULL;
}
static UINT rdpei_add_pen(RdpeiClientContext* context, INT32 externalId,
const RDPINPUT_PEN_CONTACT* contact)
{
RDPEI_PLUGIN* rdpei;
RDPINPUT_PEN_CONTACT_POINT* contactPoint;
if (!context || !contact || !context->handle)
return ERROR_INTERNAL_ERROR;
rdpei = (RDPEI_PLUGIN*)context->handle;
EnterCriticalSection(&rdpei->lock);
contactPoint = rdpei_pen_contact(rdpei, externalId, TRUE);
if (contactPoint)
{
contactPoint->data = *contact;
contactPoint->dirty = TRUE;
SetEvent(rdpei->event);
}
LeaveCriticalSection(&rdpei->lock);
return CHANNEL_RC_OK;
}
static UINT rdpei_pen_process(RdpeiClientContext* context, INT32 externalId, UINT32 contactFlags,
UINT32 fieldFlags, INT32 x, INT32 y, va_list ap)
{
RDPINPUT_PEN_CONTACT_POINT* contactPoint;
RDPEI_PLUGIN* rdpei;
BOOL begin;
UINT error = CHANNEL_RC_OK;
if (!context || !context->handle)
return ERROR_INTERNAL_ERROR;
rdpei = (RDPEI_PLUGIN*)context->handle;
begin = contactFlags & CONTACT_FLAG_DOWN;
EnterCriticalSection(&rdpei->lock);
contactPoint = rdpei_pen_contact(rdpei, externalId, !begin);
LeaveCriticalSection(&rdpei->lock);
if (contactPoint != NULL)
{
RDPINPUT_PEN_CONTACT contact = { 0 };
contact.x = x;
contact.y = y;
contact.fieldsPresent = fieldFlags;
contact.contactFlags = contactFlags;
if (fieldFlags & PEN_CONTACT_PENFLAGS_PRESENT)
contact.penFlags = va_arg(ap, UINT32);
if (fieldFlags & PEN_CONTACT_PRESSURE_PRESENT)
contact.pressure = va_arg(ap, UINT32);
if (fieldFlags & PEN_CONTACT_ROTATION_PRESENT)
contact.rotation = va_arg(ap, UINT32);
if (fieldFlags & PEN_CONTACT_TILTX_PRESENT)
contact.tiltX = va_arg(ap, INT32);
if (fieldFlags & PEN_CONTACT_TILTY_PRESENT)
contact.tiltY = va_arg(ap, INT32);
error = context->AddPen(context, externalId, &contact);
}
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_pen_begin(RdpeiClientContext* context, INT32 externalId, UINT32 fieldFlags,
INT32 x, INT32 y, ...)
{
UINT error;
va_list ap;
va_start(ap, y);
error = rdpei_pen_process(context, externalId,
CONTACT_FLAG_DOWN | CONTACT_FLAG_INRANGE | CONTACT_FLAG_INCONTACT,
fieldFlags, x, y, ap);
va_end(ap);
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_pen_update(RdpeiClientContext* context, INT32 externalId, UINT32 fieldFlags,
INT32 x, INT32 y, ...)
{
UINT error;
va_list ap;
va_start(ap, y);
error = rdpei_pen_process(context, externalId,
CONTACT_FLAG_UPDATE | CONTACT_FLAG_INRANGE | CONTACT_FLAG_INCONTACT,
fieldFlags, x, y, ap);
va_end(ap);
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT rdpei_pen_end(RdpeiClientContext* context, INT32 externalId, UINT32 fieldFlags, INT32 x,
INT32 y, ...)
{
UINT error;
va_list ap;
va_start(ap, y);
error = rdpei_pen_process(context, externalId,
CONTACT_FLAG_UPDATE | CONTACT_FLAG_INRANGE | CONTACT_FLAG_INCONTACT,
fieldFlags, x, y, ap);
if (error == CHANNEL_RC_OK)
error = rdpei_pen_process(context, externalId, CONTACT_FLAG_UP, fieldFlags, x, y, ap);
va_end(ap);
return error;
}
#ifdef BUILTIN_CHANNELS
#define DVCPluginEntry rdpei_DVCPluginEntry
#else
#define DVCPluginEntry FREERDP_API DVCPluginEntry
#endif
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
UINT DVCPluginEntry(IDRDYNVC_ENTRY_POINTS* pEntryPoints)
{
UINT error;
RDPEI_PLUGIN* rdpei = NULL;
RdpeiClientContext* context = NULL;
rdpei = (RDPEI_PLUGIN*)pEntryPoints->GetPlugin(pEntryPoints, "rdpei");
if (!rdpei)
{
rdpei = (RDPEI_PLUGIN*)calloc(1, sizeof(RDPEI_PLUGIN));
if (!rdpei)
{
WLog_ERR(TAG, "calloc failed!");
return CHANNEL_RC_NO_MEMORY;
}
rdpei->iface.Initialize = rdpei_plugin_initialize;
rdpei->iface.Connected = NULL;
rdpei->iface.Disconnected = NULL;
rdpei->iface.Terminated = rdpei_plugin_terminated;
rdpei->version = RDPINPUT_PROTOCOL_V300;
rdpei->currentFrameTime = 0;
rdpei->previousFrameTime = 0;
rdpei->maxTouchContacts = MAX_CONTACTS;
rdpei->maxPenContacts = MAX_PEN_CONTACTS;
rdpei->rdpcontext =
((freerdp*)((rdpSettings*)pEntryPoints->GetRdpSettings(pEntryPoints))->instance)
->context;
context = (RdpeiClientContext*)calloc(1, sizeof(RdpeiClientContext));
if (!context)
{
WLog_ERR(TAG, "calloc failed!");
error = CHANNEL_RC_NO_MEMORY;
goto error_out;
}
context->handle = (void*)rdpei;
context->GetVersion = rdpei_get_version;
context->GetFeatures = rdpei_get_features;
context->AddContact = rdpei_add_contact;
context->TouchBegin = rdpei_touch_begin;
context->TouchUpdate = rdpei_touch_update;
context->TouchEnd = rdpei_touch_end;
context->AddPen = rdpei_add_pen;
context->PenBegin = rdpei_pen_begin;
context->PenUpdate = rdpei_pen_update;
context->PenEnd = rdpei_pen_end;
rdpei->iface.pInterface = (void*)context;
if ((error = pEntryPoints->RegisterPlugin(pEntryPoints, "rdpei", (IWTSPlugin*)rdpei)))
{
WLog_ERR(TAG, "EntryPoints->RegisterPlugin failed with error %" PRIu32 "!", error);
error = CHANNEL_RC_NO_MEMORY;
goto error_out;
}
rdpei->context = context;
}
return CHANNEL_RC_OK;
error_out:
free(context);
free(rdpei);
return error;
}
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