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FreeRDP/channels/drdynvc/client/drdynvc_main.c
Norbert Federa f71b6b46e8 fix string format specifiers 
- fixed invalid, missing or additional arguments
- removed all type casts from arguments
- added missing (void*) typecasts for %p arguments
- use inttypes defines where appropriate
2016-12-16 13:48:43 +01:00

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/**
* FreeRDP: A Remote Desktop Protocol Implementation
* Dynamic Virtual Channel
*
* Copyright 2010-2011 Vic Lee
* 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 <winpr/crt.h>
#include <winpr/stream.h>
#include "drdynvc_main.h"
#define TAG CHANNELS_TAG("drdynvc.client")
static void dvcman_channel_free(void* channel);
static UINT drdynvc_write_data(drdynvcPlugin* drdynvc, UINT32 ChannelId,
const BYTE* data, UINT32 dataSize);
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT dvcman_get_configuration(IWTSListener* pListener,
void** ppPropertyBag)
{
*ppPropertyBag = NULL;
return ERROR_INTERNAL_ERROR;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT dvcman_create_listener(IWTSVirtualChannelManager* pChannelMgr,
const char* pszChannelName, ULONG ulFlags,
IWTSListenerCallback* pListenerCallback, IWTSListener** ppListener)
{
DVCMAN* dvcman = (DVCMAN*) pChannelMgr;
DVCMAN_LISTENER* listener;
if (dvcman->num_listeners < MAX_PLUGINS)
{
WLog_DBG(TAG, "create_listener: %d.%s.", dvcman->num_listeners, pszChannelName);
listener = (DVCMAN_LISTENER*) calloc(1, sizeof(DVCMAN_LISTENER));
if (!listener)
{
WLog_ERR(TAG, "calloc failed!");
return CHANNEL_RC_NO_MEMORY;
}
listener->iface.GetConfiguration = dvcman_get_configuration;
listener->iface.pInterface = NULL;
listener->dvcman = dvcman;
listener->channel_name = _strdup(pszChannelName);
if (!listener->channel_name)
{
WLog_ERR(TAG, "_strdup failed!");
free(listener);
return CHANNEL_RC_NO_MEMORY;
}
listener->flags = ulFlags;
listener->listener_callback = pListenerCallback;
if (ppListener)
*ppListener = (IWTSListener*) listener;
dvcman->listeners[dvcman->num_listeners++] = (IWTSListener*) listener;
return CHANNEL_RC_OK;
}
else
{
WLog_ERR(TAG, "create_listener: Maximum DVC listener number reached.");
return ERROR_INTERNAL_ERROR;
}
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT dvcman_register_plugin(IDRDYNVC_ENTRY_POINTS* pEntryPoints,
const char* name, IWTSPlugin* pPlugin)
{
DVCMAN* dvcman = ((DVCMAN_ENTRY_POINTS*) pEntryPoints)->dvcman;
if (dvcman->num_plugins < MAX_PLUGINS)
{
dvcman->plugin_names[dvcman->num_plugins] = name;
dvcman->plugins[dvcman->num_plugins++] = pPlugin;
WLog_DBG(TAG, "register_plugin: num_plugins %d", dvcman->num_plugins);
return CHANNEL_RC_OK;
}
else
{
WLog_ERR(TAG, "register_plugin: Maximum DVC plugin number %u reached.",
MAX_PLUGINS);
return ERROR_INTERNAL_ERROR;
}
}
static IWTSPlugin* dvcman_get_plugin(IDRDYNVC_ENTRY_POINTS* pEntryPoints,
const char* name)
{
int i;
DVCMAN* dvcman = ((DVCMAN_ENTRY_POINTS*) pEntryPoints)->dvcman;
for (i = 0; i < dvcman->num_plugins; i++)
{
if (dvcman->plugin_names[i] == name ||
strcmp(dvcman->plugin_names[i], name) == 0)
{
return dvcman->plugins[i];
}
}
return NULL;
}
static ADDIN_ARGV* dvcman_get_plugin_data(IDRDYNVC_ENTRY_POINTS* pEntryPoints)
{
return ((DVCMAN_ENTRY_POINTS*) pEntryPoints)->args;
}
static void* dvcman_get_rdp_settings(IDRDYNVC_ENTRY_POINTS* pEntryPoints)
{
return (void*)((DVCMAN_ENTRY_POINTS*) pEntryPoints)->settings;
}
static UINT32 dvcman_get_channel_id(IWTSVirtualChannel* channel)
{
return ((DVCMAN_CHANNEL*) channel)->channel_id;
}
static IWTSVirtualChannel* dvcman_find_channel_by_id(IWTSVirtualChannelManager*
pChannelMgr,
UINT32 ChannelId)
{
int index;
BOOL found = FALSE;
DVCMAN_CHANNEL* channel;
DVCMAN* dvcman = (DVCMAN*) pChannelMgr;
ArrayList_Lock(dvcman->channels);
index = 0;
channel = (DVCMAN_CHANNEL*) ArrayList_GetItem(dvcman->channels, index++);
while (channel)
{
if (channel->channel_id == ChannelId)
{
found = TRUE;
break;
}
channel = (DVCMAN_CHANNEL*) ArrayList_GetItem(dvcman->channels, index++);
}
ArrayList_Unlock(dvcman->channels);
return (found) ? ((IWTSVirtualChannel*) channel) : NULL;
}
static IWTSVirtualChannelManager* dvcman_new(drdynvcPlugin* plugin)
{
DVCMAN* dvcman;
dvcman = (DVCMAN*) calloc(1, sizeof(DVCMAN));
if (!dvcman)
{
WLog_ERR(TAG, "calloc failed!");
return NULL;
}
dvcman->iface.CreateListener = dvcman_create_listener;
dvcman->iface.FindChannelById = dvcman_find_channel_by_id;
dvcman->iface.GetChannelId = dvcman_get_channel_id;
dvcman->drdynvc = plugin;
dvcman->channels = ArrayList_New(TRUE);
if (!dvcman->channels)
{
WLog_ERR(TAG, "ArrayList_New failed!");
free(dvcman);
return NULL;
}
dvcman->channels->object.fnObjectFree = dvcman_channel_free;
dvcman->pool = StreamPool_New(TRUE, 10);
if (!dvcman->pool)
{
WLog_ERR(TAG, "StreamPool_New failed!");
ArrayList_Free(dvcman->channels);
free(dvcman);
return NULL;
}
return (IWTSVirtualChannelManager*) dvcman;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT dvcman_load_addin(IWTSVirtualChannelManager* pChannelMgr,
ADDIN_ARGV* args,
rdpSettings* settings)
{
DVCMAN_ENTRY_POINTS entryPoints;
PDVC_PLUGIN_ENTRY pDVCPluginEntry = NULL;
WLog_INFO(TAG, "Loading Dynamic Virtual Channel %s", args->argv[0]);
pDVCPluginEntry = (PDVC_PLUGIN_ENTRY) freerdp_load_channel_addin_entry(
args->argv[0],
NULL, NULL, FREERDP_ADDIN_CHANNEL_DYNAMIC);
if (pDVCPluginEntry)
{
entryPoints.iface.RegisterPlugin = dvcman_register_plugin;
entryPoints.iface.GetPlugin = dvcman_get_plugin;
entryPoints.iface.GetPluginData = dvcman_get_plugin_data;
entryPoints.iface.GetRdpSettings = dvcman_get_rdp_settings;
entryPoints.dvcman = (DVCMAN*) pChannelMgr;
entryPoints.args = args;
entryPoints.settings = settings;
return pDVCPluginEntry((IDRDYNVC_ENTRY_POINTS*) &entryPoints);
}
return ERROR_INVALID_FUNCTION;
}
static DVCMAN_CHANNEL* dvcman_channel_new(IWTSVirtualChannelManager*
pChannelMgr,
UINT32 ChannelId, const char* ChannelName)
{
DVCMAN_CHANNEL* channel;
if (dvcman_find_channel_by_id(pChannelMgr, ChannelId))
{
WLog_ERR(TAG, "Protocol error: Duplicated ChannelId %"PRIu32" (%s)!", ChannelId,
ChannelName);
return NULL;
}
channel = (DVCMAN_CHANNEL*) calloc(1, sizeof(DVCMAN_CHANNEL));
if (!channel)
{
WLog_ERR(TAG, "calloc failed!");
return NULL;
}
channel->dvcman = (DVCMAN*) pChannelMgr;
channel->channel_id = ChannelId;
channel->channel_name = _strdup(ChannelName);
if (!channel->channel_name)
{
WLog_ERR(TAG, "_strdup failed!");
free(channel);
return NULL;
}
if (!InitializeCriticalSectionEx(&(channel->lock), 0 , 0))
{
WLog_ERR(TAG, "InitializeCriticalSectionEx failed!");
free(channel->channel_name);
free(channel);
return NULL;
}
return channel;
}
static void dvcman_channel_free(void* arg)
{
DVCMAN_CHANNEL* channel = (DVCMAN_CHANNEL*) arg;
if (channel->channel_callback)
{
channel->channel_callback->OnClose(channel->channel_callback);
channel->channel_callback = NULL;
}
if (channel->dvc_data)
{
Stream_Release(channel->dvc_data);
channel->dvc_data = NULL;
}
DeleteCriticalSection(&(channel->lock));
if (channel->channel_name)
{
free(channel->channel_name);
channel->channel_name = NULL;
}
free(channel);
}
static void dvcman_free(IWTSVirtualChannelManager* pChannelMgr)
{
int i;
IWTSPlugin* pPlugin;
DVCMAN_LISTENER* listener;
DVCMAN* dvcman = (DVCMAN*) pChannelMgr;
UINT error;
ArrayList_Free(dvcman->channels);
for (i = 0; i < dvcman->num_listeners; i++)
{
listener = (DVCMAN_LISTENER*) dvcman->listeners[i];
free(listener->channel_name);
free(listener);
}
dvcman->num_listeners = 0;
for (i = 0; i < dvcman->num_plugins; i++)
{
pPlugin = dvcman->plugins[i];
if (pPlugin->Terminated)
if ((error = pPlugin->Terminated(pPlugin)))
WLog_ERR(TAG, "Terminated failed with error %"PRIu32"!", error);
}
dvcman->num_plugins = 0;
StreamPool_Free(dvcman->pool);
free(dvcman);
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT dvcman_init(IWTSVirtualChannelManager* pChannelMgr)
{
int i;
IWTSPlugin* pPlugin;
DVCMAN* dvcman = (DVCMAN*) pChannelMgr;
UINT error;
for (i = 0; i < dvcman->num_plugins; i++)
{
pPlugin = dvcman->plugins[i];
if (pPlugin->Initialize)
if ((error = pPlugin->Initialize(pPlugin, pChannelMgr)))
{
WLog_ERR(TAG, "Initialize failed with error %"PRIu32"!", error);
return error;
}
}
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT dvcman_write_channel(IWTSVirtualChannel* pChannel, ULONG cbSize,
const BYTE* pBuffer, void* pReserved)
{
UINT status;
DVCMAN_CHANNEL* channel = (DVCMAN_CHANNEL*) pChannel;
EnterCriticalSection(&(channel->lock));
status = drdynvc_write_data(channel->dvcman->drdynvc,
channel->channel_id, pBuffer, cbSize);
LeaveCriticalSection(&(channel->lock));
return status;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT dvcman_close_channel_iface(IWTSVirtualChannel* pChannel)
{
DVCMAN_CHANNEL* channel = (DVCMAN_CHANNEL*) pChannel;
WLog_DBG(TAG, "close_channel_iface: id=%"PRIu32"", channel->channel_id);
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT dvcman_create_channel(IWTSVirtualChannelManager* pChannelMgr,
UINT32 ChannelId, const char* ChannelName)
{
int i;
BOOL bAccept;
DVCMAN_LISTENER* listener;
DVCMAN_CHANNEL* channel;
DrdynvcClientContext* context;
IWTSVirtualChannelCallback* pCallback;
DVCMAN* dvcman = (DVCMAN*) pChannelMgr;
UINT error;
if (!(channel = dvcman_channel_new(pChannelMgr, ChannelId, ChannelName)))
{
WLog_ERR(TAG, "dvcman_channel_new failed!");
return CHANNEL_RC_NO_MEMORY;
}
channel->status = 1;
ArrayList_Add(dvcman->channels, channel);
for (i = 0; i < dvcman->num_listeners; i++)
{
listener = (DVCMAN_LISTENER*) dvcman->listeners[i];
if (strcmp(listener->channel_name, ChannelName) == 0)
{
channel->iface.Write = dvcman_write_channel;
channel->iface.Close = dvcman_close_channel_iface;
bAccept = TRUE;
pCallback = NULL;
if ((error = listener->listener_callback->OnNewChannelConnection(
listener->listener_callback,
(IWTSVirtualChannel*) channel, NULL, &bAccept, &pCallback)) == CHANNEL_RC_OK
&& bAccept)
{
WLog_DBG(TAG, "listener %s created new channel %"PRIu32"",
listener->channel_name, channel->channel_id);
channel->status = 0;
channel->channel_callback = pCallback;
channel->pInterface = listener->iface.pInterface;
context = dvcman->drdynvc->context;
IFCALLRET(context->OnChannelConnected, error, context, ChannelName,
listener->iface.pInterface);
if (error)
WLog_ERR(TAG, "context.ReceiveSamples failed with error %"PRIu32"", error);
return error;
}
else
{
if (error)
{
WLog_ERR(TAG, "OnNewChannelConnection failed with error %"PRIu32"!", error);
return error;
}
else
{
WLog_ERR(TAG, "OnNewChannelConnection returned with bAccept FALSE!");
return ERROR_INTERNAL_ERROR;
}
}
}
}
return ERROR_INTERNAL_ERROR;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT dvcman_open_channel(IWTSVirtualChannelManager* pChannelMgr,
UINT32 ChannelId)
{
DVCMAN_CHANNEL* channel;
IWTSVirtualChannelCallback* pCallback;
UINT error;
channel = (DVCMAN_CHANNEL*) dvcman_find_channel_by_id(pChannelMgr, ChannelId);
if (!channel)
{
WLog_ERR(TAG, "ChannelId %"PRIu32" not found!", ChannelId);
return ERROR_INTERNAL_ERROR;
}
if (channel->status == CHANNEL_RC_OK)
{
pCallback = channel->channel_callback;
if ((pCallback->OnOpen) && (error = pCallback->OnOpen(pCallback)))
{
WLog_ERR(TAG, "OnOpen failed with error %"PRIu32"!", error);
return error;
}
WLog_DBG(TAG, "open_channel: ChannelId %"PRIu32"", ChannelId);
}
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT dvcman_close_channel(IWTSVirtualChannelManager* pChannelMgr,
UINT32 ChannelId)
{
DVCMAN_CHANNEL* channel;
IWTSVirtualChannel* ichannel;
DrdynvcClientContext* context;
DVCMAN* dvcman = (DVCMAN*) pChannelMgr;
UINT error = CHANNEL_RC_OK;
channel = (DVCMAN_CHANNEL*) dvcman_find_channel_by_id(pChannelMgr, ChannelId);
if (!channel)
{
//WLog_ERR(TAG, "ChannelId %"PRIu32" not found!", ChannelId);
/**
* Windows 8 / Windows Server 2012 send close requests for channels that failed to be created.
* Do not warn, simply return success here.
*/
return CHANNEL_RC_OK;
}
if (channel->status == CHANNEL_RC_OK)
{
context = dvcman->drdynvc->context;
IFCALLRET(context->OnChannelDisconnected, error, context, channel->channel_name,
channel->pInterface);
if (error)
{
WLog_ERR(TAG, "OnChannelDisconnected returned with error %"PRIu32"!", error);
return error;
}
WLog_DBG(TAG, "dvcman_close_channel: channel %"PRIu32" closed", ChannelId);
ichannel = (IWTSVirtualChannel*) channel;
if ((ichannel->Close) && (error = ichannel->Close(ichannel)))
{
WLog_ERR(TAG, "Close failed with error %"PRIu32"!", error);
return error;
}
}
ArrayList_Remove(dvcman->channels, channel);
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT dvcman_receive_channel_data_first(IWTSVirtualChannelManager*
pChannelMgr,
UINT32 ChannelId, UINT32 length)
{
DVCMAN_CHANNEL* channel;
channel = (DVCMAN_CHANNEL*) dvcman_find_channel_by_id(pChannelMgr, ChannelId);
if (!channel)
{
/**
* Windows Server 2012 R2 can send some messages over Microsoft::Windows::RDS::Geometry::v08.01
* even if the dynamic virtual channel wasn't registered on our side. Ignoring it works.
*/
WLog_ERR(TAG, "ChannelId %"PRIu32" not found!", ChannelId);
return CHANNEL_RC_OK;
}
if (channel->dvc_data)
Stream_Release(channel->dvc_data);
channel->dvc_data = StreamPool_Take(channel->dvcman->pool, length);
if (!channel->dvc_data)
{
WLog_ERR(TAG, "StreamPool_Take failed!");
return CHANNEL_RC_NO_MEMORY;
}
channel->dvc_data_length = length;
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT dvcman_receive_channel_data(IWTSVirtualChannelManager* pChannelMgr,
UINT32 ChannelId, wStream* data)
{
UINT status = CHANNEL_RC_OK;
DVCMAN_CHANNEL* channel;
size_t dataSize = Stream_GetRemainingLength(data);
channel = (DVCMAN_CHANNEL*) dvcman_find_channel_by_id(pChannelMgr, ChannelId);
if (!channel)
{
/* Windows 8.1 tries to open channels not created.
* Ignore cases like this. */
WLog_ERR(TAG, "ChannelId %"PRIu32" not found!", ChannelId);
return CHANNEL_RC_OK;
}
if (channel->dvc_data)
{
/* Fragmented data */
if (Stream_GetPosition(channel->dvc_data) + dataSize > (UINT32) Stream_Capacity(
channel->dvc_data))
{
WLog_ERR(TAG, "data exceeding declared length!");
Stream_Release(channel->dvc_data);
channel->dvc_data = NULL;
return ERROR_INVALID_DATA;
}
Stream_Write(channel->dvc_data, Stream_Pointer(data), dataSize);
if (Stream_GetPosition(channel->dvc_data) >= channel->dvc_data_length)
{
Stream_SealLength(channel->dvc_data);
Stream_SetPosition(channel->dvc_data, 0);
status = channel->channel_callback->OnDataReceived(channel->channel_callback,
channel->dvc_data);
Stream_Release(channel->dvc_data);
channel->dvc_data = NULL;
}
}
else
{
status = channel->channel_callback->OnDataReceived(channel->channel_callback,
data);
}
return status;
}
static UINT drdynvc_write_variable_uint(wStream* s, UINT32 val)
{
UINT cb;
if (val <= 0xFF)
{
cb = 0;
Stream_Write_UINT8(s, val);
}
else if (val <= 0xFFFF)
{
cb = 1;
Stream_Write_UINT16(s, val);
}
else
{
cb = 2;
Stream_Write_UINT32(s, val);
}
return cb;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT drdynvc_send(drdynvcPlugin* drdynvc, wStream* s)
{
UINT status;
if (!drdynvc)
{
status = CHANNEL_RC_BAD_INIT_HANDLE;
}
else
{
status = drdynvc->channelEntryPoints.pVirtualChannelWriteEx(drdynvc->InitHandle,
drdynvc->OpenHandle, Stream_Buffer(s), (UINT32) Stream_GetPosition(s), s);
}
if (status != CHANNEL_RC_OK)
{
Stream_Free(s, TRUE);
WLog_ERR(TAG, "VirtualChannelWriteEx failed with %s [%08"PRIX32"]", WTSErrorToString(status), status);
}
return status;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT drdynvc_write_data(drdynvcPlugin* drdynvc, UINT32 ChannelId,
const BYTE* data, UINT32 dataSize)
{
wStream* data_out;
unsigned long pos;
UINT32 cbChId;
UINT32 cbLen;
unsigned long chunkLength;
UINT status;
WLog_DBG(TAG, "write_data: ChannelId=%"PRIu32" size=%"PRIu32"", ChannelId, dataSize);
data_out = Stream_New(NULL, CHANNEL_CHUNK_LENGTH);
if (!data_out)
{
WLog_ERR(TAG, "Stream_New failed!");
return CHANNEL_RC_NO_MEMORY;
}
Stream_SetPosition(data_out, 1);
cbChId = drdynvc_write_variable_uint(data_out, ChannelId);
pos = Stream_GetPosition(data_out);
if (dataSize == 0)
{
Stream_SetPosition(data_out, 0);
Stream_Write_UINT8(data_out, 0x40 | cbChId);
Stream_SetPosition(data_out, pos);
status = drdynvc_send(drdynvc, data_out);
}
else if (dataSize <= CHANNEL_CHUNK_LENGTH - pos)
{
Stream_SetPosition(data_out, 0);
Stream_Write_UINT8(data_out, 0x30 | cbChId);
Stream_SetPosition(data_out, pos);
Stream_Write(data_out, data, dataSize);
status = drdynvc_send(drdynvc, data_out);
}
else
{
/* Fragment the data */
cbLen = drdynvc_write_variable_uint(data_out, dataSize);
pos = Stream_GetPosition(data_out);
Stream_SetPosition(data_out, 0);
Stream_Write_UINT8(data_out, 0x20 | cbChId | (cbLen << 2));
Stream_SetPosition(data_out, pos);
chunkLength = CHANNEL_CHUNK_LENGTH - pos;
Stream_Write(data_out, data, chunkLength);
data += chunkLength;
dataSize -= chunkLength;
status = drdynvc_send(drdynvc, data_out);
while (status == CHANNEL_RC_OK && dataSize > 0)
{
data_out = Stream_New(NULL, CHANNEL_CHUNK_LENGTH);
if (!data_out)
{
WLog_ERR(TAG, "Stream_New failed!");
return CHANNEL_RC_NO_MEMORY;
}
Stream_SetPosition(data_out, 1);
cbChId = drdynvc_write_variable_uint(data_out, ChannelId);
pos = Stream_GetPosition(data_out);
Stream_SetPosition(data_out, 0);
Stream_Write_UINT8(data_out, 0x30 | cbChId);
Stream_SetPosition(data_out, pos);
chunkLength = dataSize;
if (chunkLength > CHANNEL_CHUNK_LENGTH - pos)
chunkLength = CHANNEL_CHUNK_LENGTH - pos;
Stream_Write(data_out, data, chunkLength);
data += chunkLength;
dataSize -= chunkLength;
status = drdynvc_send(drdynvc, data_out);
}
}
if (status != CHANNEL_RC_OK)
{
WLog_ERR(TAG, "VirtualChannelWriteEx failed with %s [%08"PRIX32"]",
WTSErrorToString(status), status);
return status;
}
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT drdynvc_send_capability_response(drdynvcPlugin* drdynvc)
{
UINT status;
wStream* s;
WLog_DBG(TAG, "capability_response");
s = Stream_New(NULL, 4);
if (!s)
{
WLog_ERR(TAG, "Stream_Ndrdynvc_write_variable_uintew failed!");
return CHANNEL_RC_NO_MEMORY;
}
Stream_Write_UINT16(s,
0x0050); /* Cmd+Sp+cbChId+Pad. Note: MSTSC sends 0x005c */
Stream_Write_UINT16(s, drdynvc->version);
status = drdynvc_send(drdynvc, s);
if (status != CHANNEL_RC_OK)
{
WLog_ERR(TAG, "VirtualChannelWriteEx failed with %s [%08"PRIX32"]",
WTSErrorToString(status), status);
}
return status;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT drdynvc_process_capability_request(drdynvcPlugin* drdynvc, int Sp,
int cbChId, wStream* s)
{
UINT status;
WLog_DBG(TAG, "capability_request Sp=%d cbChId=%d", Sp, cbChId);
Stream_Seek(s, 1); /* pad */
Stream_Read_UINT16(s, drdynvc->version);
/* RDP8 servers offer version 3, though Microsoft forgot to document it
* in their early documents. It behaves the same as version 2.
*/
if ((drdynvc->version == 2) || (drdynvc->version == 3))
{
Stream_Read_UINT16(s, drdynvc->PriorityCharge0);
Stream_Read_UINT16(s, drdynvc->PriorityCharge1);
Stream_Read_UINT16(s, drdynvc->PriorityCharge2);
Stream_Read_UINT16(s, drdynvc->PriorityCharge3);
}
status = drdynvc_send_capability_response(drdynvc);
drdynvc->state = DRDYNVC_STATE_READY;
return status;
}
static UINT32 drdynvc_read_variable_uint(wStream* s, int cbLen)
{
UINT32 val;
switch (cbLen)
{
case 0:
Stream_Read_UINT8(s, val);
break;
case 1:
Stream_Read_UINT16(s, val);
break;
default:
Stream_Read_UINT32(s, val);
break;
}
return val;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT drdynvc_process_create_request(drdynvcPlugin* drdynvc, int Sp,
int cbChId, wStream* s)
{
unsigned long pos;
UINT status;
UINT32 ChannelId;
wStream* data_out;
UINT channel_status;
if (drdynvc->state == DRDYNVC_STATE_CAPABILITIES)
{
/**
* For some reason the server does not always send the
* capabilities pdu as it should. When this happens,
* send a capabilities response.
*/
drdynvc->version = 3;
if ((status = drdynvc_send_capability_response(drdynvc)))
{
WLog_ERR(TAG, "drdynvc_send_capability_response failed!");
return status;
}
drdynvc->state = DRDYNVC_STATE_READY;
}
ChannelId = drdynvc_read_variable_uint(s, cbChId);
pos = Stream_GetPosition(s);
WLog_DBG(TAG, "process_create_request: ChannelId=%"PRIu32" ChannelName=%s", ChannelId,
Stream_Pointer(s));
channel_status = dvcman_create_channel(drdynvc->channel_mgr, ChannelId,
(char*) Stream_Pointer(s));
data_out = Stream_New(NULL, pos + 4);
if (!s)
{
WLog_ERR(TAG, "Stream_New failed!");
return CHANNEL_RC_NO_MEMORY;
}
Stream_Write_UINT8(data_out, 0x10 | cbChId);
Stream_SetPosition(s, 1);
Stream_Copy(s, data_out, pos - 1);
if (channel_status == CHANNEL_RC_OK)
{
WLog_DBG(TAG, "channel created");
Stream_Write_UINT32(data_out, 0);
}
else
{
WLog_DBG(TAG, "no listener");
Stream_Write_UINT32(data_out,
(UINT32) 0xC0000001); /* same code used by mstsc */
}
status = drdynvc_send(drdynvc, data_out);
if (status != CHANNEL_RC_OK)
{
WLog_ERR(TAG, "VirtualChannelWriteEx failed with %s [%08"PRIX32"]",
WTSErrorToString(status), status);
return status;
}
if (channel_status == CHANNEL_RC_OK)
{
if ((status = dvcman_open_channel(drdynvc->channel_mgr, ChannelId)))
{
WLog_ERR(TAG, "dvcman_open_channel failed with error %"PRIu32"!", status);
return status;
}
}
else
{
if ((status = dvcman_close_channel(drdynvc->channel_mgr, ChannelId)))
WLog_ERR(TAG, "dvcman_close_channel failed with error %"PRIu32"!", status);
}
return status;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT drdynvc_process_data_first(drdynvcPlugin* drdynvc, int Sp,
int cbChId, wStream* s)
{
UINT status;
UINT32 Length;
UINT32 ChannelId;
ChannelId = drdynvc_read_variable_uint(s, cbChId);
Length = drdynvc_read_variable_uint(s, Sp);
WLog_DBG(TAG, "process_data_first: Sp=%d cbChId=%d, ChannelId=%"PRIu32" Length=%"PRIu32"", Sp,
cbChId, ChannelId, Length);
status = dvcman_receive_channel_data_first(drdynvc->channel_mgr, ChannelId,
Length);
if (status)
return status;
return dvcman_receive_channel_data(drdynvc->channel_mgr, ChannelId, s);
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT drdynvc_process_data(drdynvcPlugin* drdynvc, int Sp, int cbChId,
wStream* s)
{
UINT32 ChannelId;
ChannelId = drdynvc_read_variable_uint(s, cbChId);
WLog_DBG(TAG, "process_data: Sp=%d cbChId=%d, ChannelId=%"PRIu32"", Sp, cbChId,
ChannelId);
return dvcman_receive_channel_data(drdynvc->channel_mgr, ChannelId, s);
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT drdynvc_process_close_request(drdynvcPlugin* drdynvc, int Sp,
int cbChId, wStream* s)
{
int value;
UINT error;
UINT32 ChannelId;
wStream* data_out;
ChannelId = drdynvc_read_variable_uint(s, cbChId);
WLog_DBG(TAG, "process_close_request: Sp=%d cbChId=%d, ChannelId=%"PRIu32"", Sp,
cbChId, ChannelId);
if ((error = dvcman_close_channel(drdynvc->channel_mgr, ChannelId)))
{
WLog_ERR(TAG, "dvcman_close_channel failed with error %"PRIu32"!", error);
return error;
}
data_out = Stream_New(NULL, 4);
if (!data_out)
{
WLog_ERR(TAG, "Stream_New failed!");
return CHANNEL_RC_NO_MEMORY;
}
value = (CLOSE_REQUEST_PDU << 4) | (cbChId & 0x03);
Stream_Write_UINT8(data_out, value);
drdynvc_write_variable_uint(data_out, ChannelId);
error = drdynvc_send(drdynvc, data_out);
if (error)
WLog_ERR(TAG, "VirtualChannelWriteEx failed with %s [%08"PRIX32"]",
WTSErrorToString(error), error);
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT drdynvc_order_recv(drdynvcPlugin* drdynvc, wStream* s)
{
int value;
int Cmd;
int Sp;
int cbChId;
Stream_Read_UINT8(s, value);
Cmd = (value & 0xf0) >> 4;
Sp = (value & 0x0c) >> 2;
cbChId = (value & 0x03) >> 0;
WLog_DBG(TAG, "order_recv: Cmd=0x%x, Sp=%d cbChId=%d", Cmd, Sp,cbChId);
switch (Cmd)
{
case CAPABILITY_REQUEST_PDU:
return drdynvc_process_capability_request(drdynvc, Sp, cbChId, s);
break;
case CREATE_REQUEST_PDU:
return drdynvc_process_create_request(drdynvc, Sp, cbChId, s);
break;
case DATA_FIRST_PDU:
return drdynvc_process_data_first(drdynvc, Sp, cbChId, s);
break;
case DATA_PDU:
return drdynvc_process_data(drdynvc, Sp, cbChId, s);
break;
case CLOSE_REQUEST_PDU:
return drdynvc_process_close_request(drdynvc, Sp, cbChId, s);
break;
default:
WLog_ERR(TAG, "unknown drdynvc cmd 0x%x", Cmd);
return ERROR_INTERNAL_ERROR;
break;
}
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT drdynvc_virtual_channel_event_data_received(drdynvcPlugin* drdynvc,
void* pData, UINT32 dataLength, UINT32 totalLength, UINT32 dataFlags)
{
wStream* data_in;
if ((dataFlags & CHANNEL_FLAG_SUSPEND) || (dataFlags & CHANNEL_FLAG_RESUME))
{
return CHANNEL_RC_OK;
}
if (dataFlags & CHANNEL_FLAG_FIRST)
{
if (drdynvc->data_in)
Stream_Free(drdynvc->data_in, TRUE);
drdynvc->data_in = Stream_New(NULL, totalLength);
}
if (!(data_in = drdynvc->data_in))
{
WLog_ERR(TAG, "Stream_New failed!");
return CHANNEL_RC_NO_MEMORY;
}
if (!Stream_EnsureRemainingCapacity(data_in, (int) dataLength))
{
WLog_ERR(TAG, "Stream_EnsureRemainingCapacity failed!");
Stream_Free(drdynvc->data_in, TRUE);
drdynvc->data_in = NULL;
return ERROR_INTERNAL_ERROR;
}
Stream_Write(data_in, pData, dataLength);
if (dataFlags & CHANNEL_FLAG_LAST)
{
if (Stream_Capacity(data_in) != Stream_GetPosition(data_in))
{
WLog_ERR(TAG, "drdynvc_plugin_process_received: read error");
return ERROR_INVALID_DATA;
}
drdynvc->data_in = NULL;
Stream_SealLength(data_in);
Stream_SetPosition(data_in, 0);
if (!MessageQueue_Post(drdynvc->queue, NULL, 0, (void*) data_in, NULL))
{
WLog_ERR(TAG, "MessageQueue_Post failed!");
return ERROR_INTERNAL_ERROR;
}
}
return CHANNEL_RC_OK;
}
static void VCAPITYPE drdynvc_virtual_channel_open_event_ex(LPVOID lpUserParam, DWORD openHandle,
UINT event, LPVOID pData, UINT32 dataLength, UINT32 totalLength, UINT32 dataFlags)
{
UINT error = CHANNEL_RC_OK;
drdynvcPlugin* drdynvc = (drdynvcPlugin*) lpUserParam;
if (!drdynvc || (drdynvc->OpenHandle != openHandle))
{
WLog_ERR(TAG, "drdynvc_virtual_channel_open_event: error no match");
return;
}
switch (event)
{
case CHANNEL_EVENT_DATA_RECEIVED:
if ((error = drdynvc_virtual_channel_event_data_received(drdynvc, pData, dataLength, totalLength,
dataFlags)))
WLog_ERR(TAG, "drdynvc_virtual_channel_event_data_received failed with error %"PRIu32"", error);
break;
case CHANNEL_EVENT_WRITE_COMPLETE:
Stream_Free((wStream*) pData, TRUE);
break;
case CHANNEL_EVENT_USER:
break;
}
if (error && drdynvc->rdpcontext)
setChannelError(drdynvc->rdpcontext, error, "drdynvc_virtual_channel_open_event reported an error");
}
static void* drdynvc_virtual_channel_client_thread(void* arg)
{
wStream* data;
wMessage message;
UINT error = CHANNEL_RC_OK;
drdynvcPlugin* drdynvc = (drdynvcPlugin*) arg;
while (1)
{
if (!MessageQueue_Wait(drdynvc->queue))
{
WLog_ERR(TAG, "MessageQueue_Wait failed!");
error = ERROR_INTERNAL_ERROR;
break;
}
if (!MessageQueue_Peek(drdynvc->queue, &message, TRUE))
{
WLog_ERR(TAG, "MessageQueue_Peek failed!");
error = ERROR_INTERNAL_ERROR;
break;
}
if (message.id == WMQ_QUIT)
break;
if (message.id == 0)
{
data = (wStream*) message.wParam;
if ((error = drdynvc_order_recv(drdynvc, data)))
{
Stream_Free(data, TRUE);
WLog_ERR(TAG, "drdynvc_order_recv failed with error %"PRIu32"!", error);
break;
}
Stream_Free(data, TRUE);
}
}
if (error && drdynvc->rdpcontext)
setChannelError(drdynvc->rdpcontext, error,
"drdynvc_virtual_channel_client_thread reported an error");
ExitThread((DWORD) error);
return NULL;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT drdynvc_virtual_channel_event_connected(drdynvcPlugin* drdynvc, LPVOID pData,
UINT32 dataLength)
{
UINT error;
UINT32 status;
UINT32 index;
ADDIN_ARGV* args;
rdpSettings* settings;
status = drdynvc->channelEntryPoints.pVirtualChannelOpenEx(drdynvc->InitHandle,
&drdynvc->OpenHandle, drdynvc->channelDef.name, drdynvc_virtual_channel_open_event_ex);
if (status != CHANNEL_RC_OK)
{
WLog_ERR(TAG, "pVirtualChannelOpen failed with %s [%08"PRIX32"]",
WTSErrorToString(status), status);
return status;
}
drdynvc->queue = MessageQueue_New(NULL);
if (!drdynvc->queue)
{
error = CHANNEL_RC_NO_MEMORY;
WLog_ERR(TAG, "MessageQueue_New failed!");
goto error;
}
drdynvc->channel_mgr = dvcman_new(drdynvc);
if (!drdynvc->channel_mgr)
{
error = CHANNEL_RC_NO_MEMORY;
WLog_ERR(TAG, "dvcman_new failed!");
goto error;
}
settings = (rdpSettings*) drdynvc->channelEntryPoints.pExtendedData;
for (index = 0; index < settings->DynamicChannelCount; index++)
{
args = settings->DynamicChannelArray[index];
error = dvcman_load_addin(drdynvc->channel_mgr, args, settings);
if (CHANNEL_RC_OK != error)
goto error;
}
if ((error = dvcman_init(drdynvc->channel_mgr)))
{
WLog_ERR(TAG, "dvcman_init failed with error %"PRIu32"!", error);
goto error;
}
drdynvc->state = DRDYNVC_STATE_CAPABILITIES;
if (!(drdynvc->thread = CreateThread(NULL, 0,
(LPTHREAD_START_ROUTINE) drdynvc_virtual_channel_client_thread, (void*) drdynvc,
0, NULL)))
{
error = ERROR_INTERNAL_ERROR;
WLog_ERR(TAG, "CreateThread failed!");
goto error;
}
error:
return error;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT drdynvc_virtual_channel_event_disconnected(drdynvcPlugin* drdynvc)
{
UINT status;
if (MessageQueue_PostQuit(drdynvc->queue, 0) &&
(WaitForSingleObject(drdynvc->thread, INFINITE) == WAIT_FAILED))
{
status = GetLastError();
WLog_ERR(TAG, "WaitForSingleObject failed with error %"PRIu32"", status);
return status;
}
MessageQueue_Free(drdynvc->queue);
CloseHandle(drdynvc->thread);
drdynvc->queue = NULL;
drdynvc->thread = NULL;
status = drdynvc->channelEntryPoints.pVirtualChannelCloseEx(drdynvc->InitHandle,
drdynvc->OpenHandle);
if (status != CHANNEL_RC_OK)
{
WLog_ERR(TAG, "pVirtualChannelClose failed with %s [%08"PRIX32"]",
WTSErrorToString(status), status);
}
drdynvc->OpenHandle = 0;
if (drdynvc->data_in)
{
Stream_Free(drdynvc->data_in, TRUE);
drdynvc->data_in = NULL;
}
if (drdynvc->channel_mgr)
{
dvcman_free(drdynvc->channel_mgr);
drdynvc->channel_mgr = NULL;
}
return status;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT drdynvc_virtual_channel_event_terminated(drdynvcPlugin* drdynvc)
{
drdynvc->InitHandle = 0;
free(drdynvc);
return CHANNEL_RC_OK;
}
static VOID VCAPITYPE drdynvc_virtual_channel_init_event_ex(LPVOID lpUserParam, LPVOID pInitHandle,
UINT event, LPVOID pData, UINT dataLength)
{
UINT error = CHANNEL_RC_OK;
drdynvcPlugin* drdynvc = (drdynvcPlugin*) lpUserParam;
if (!drdynvc || (drdynvc->InitHandle != pInitHandle))
{
WLog_ERR(TAG, "drdynvc_virtual_channel_init_event: error no match");
return;
}
switch (event)
{
case CHANNEL_EVENT_CONNECTED:
if ((error = drdynvc_virtual_channel_event_connected(drdynvc, pData, dataLength)))
WLog_ERR(TAG, "drdynvc_virtual_channel_event_connected failed with error %"PRIu32"", error);
break;
case CHANNEL_EVENT_DISCONNECTED:
if ((error = drdynvc_virtual_channel_event_disconnected(drdynvc)))
WLog_ERR(TAG, "drdynvc_virtual_channel_event_disconnected failed with error %"PRIu32"", error);
break;
case CHANNEL_EVENT_TERMINATED:
if ((error = drdynvc_virtual_channel_event_terminated(drdynvc)))
WLog_ERR(TAG, "drdynvc_virtual_channel_event_terminated failed with error %"PRIu32"", error);
break;
}
if (error && drdynvc->rdpcontext)
setChannelError(drdynvc->rdpcontext, error,
"drdynvc_virtual_channel_init_event_ex reported an error");
}
/**
* Channel Client Interface
*/
static int drdynvc_get_version(DrdynvcClientContext* context)
{
drdynvcPlugin* drdynvc = (drdynvcPlugin*) context->handle;
return drdynvc->version;
}
/* drdynvc is always built-in */
#define VirtualChannelEntryEx drdynvc_VirtualChannelEntryEx
BOOL VCAPITYPE VirtualChannelEntryEx(PCHANNEL_ENTRY_POINTS_EX pEntryPoints, PVOID pInitHandle)
{
UINT rc;
drdynvcPlugin* drdynvc;
DrdynvcClientContext* context = NULL;
CHANNEL_ENTRY_POINTS_FREERDP_EX* pEntryPointsEx;
drdynvc = (drdynvcPlugin*) calloc(1, sizeof(drdynvcPlugin));
if (!drdynvc)
{
WLog_ERR(TAG, "calloc failed!");
return FALSE;
}
drdynvc->channelDef.options =
CHANNEL_OPTION_INITIALIZED |
CHANNEL_OPTION_ENCRYPT_RDP |
CHANNEL_OPTION_COMPRESS_RDP;
strcpy(drdynvc->channelDef.name, "drdynvc");
drdynvc->state = DRDYNVC_STATE_INITIAL;
pEntryPointsEx = (CHANNEL_ENTRY_POINTS_FREERDP_EX*) pEntryPoints;
if ((pEntryPointsEx->cbSize >= sizeof(CHANNEL_ENTRY_POINTS_FREERDP_EX)) &&
(pEntryPointsEx->MagicNumber == FREERDP_CHANNEL_MAGIC_NUMBER))
{
context = (DrdynvcClientContext*) calloc(1, sizeof(DrdynvcClientContext));
if (!context)
{
WLog_ERR(TAG, "calloc failed!");
free(drdynvc);
return FALSE;
}
context->handle = (void*) drdynvc;
context->custom = NULL;
drdynvc->context = context;
context->GetVersion = drdynvc_get_version;
drdynvc->rdpcontext = pEntryPointsEx->context;
}
drdynvc->log = WLog_Get("com.freerdp.channels.drdynvc.client");
WLog_Print(drdynvc->log, WLOG_DEBUG, "VirtualChannelEntryEx");
CopyMemory(&(drdynvc->channelEntryPoints), pEntryPoints, sizeof(CHANNEL_ENTRY_POINTS_FREERDP_EX));
drdynvc->InitHandle = pInitHandle;
rc = drdynvc->channelEntryPoints.pVirtualChannelInitEx(drdynvc, context, pInitHandle,
&drdynvc->channelDef, 1, VIRTUAL_CHANNEL_VERSION_WIN2000, drdynvc_virtual_channel_init_event_ex);
if (CHANNEL_RC_OK != rc)
{
WLog_ERR(TAG, "pVirtualChannelInit failed with %s [%08"PRIX32"]",
WTSErrorToString(rc), rc);
free(drdynvc->context);
free(drdynvc);
return FALSE;
}
drdynvc->channelEntryPoints.pInterface = context;
return TRUE;
}
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