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/**
* FreeRDP: A Remote Desktop Protocol Implementation
* Device Redirection Virtual Channel
*
* Copyright 2010-2011 Vic Lee
* Copyright 2010-2012 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.
*/
#include <freerdp/config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winpr/crt.h>
#include <winpr/stream.h>
#include <freerdp/utils/rdpdr_utils.h>
#include "rdpdr_main.h"
#include "devman.h"
#include "irp.h"
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT irp_free(IRP* irp)
{
if (!irp)
return CHANNEL_RC_OK;
if (irp->input)
Stream_Release(irp->input);
if (irp->output)
Stream_Release(irp->output);
winpr_aligned_free(irp);
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT irp_complete(IRP* irp)
{
size_t pos = 0;
rdpdrPlugin* rdpdr = NULL;
UINT error = 0;
WINPR_ASSERT(irp);
WINPR_ASSERT(irp->output);
WINPR_ASSERT(irp->devman);
rdpdr = (rdpdrPlugin*)irp->devman->plugin;
WINPR_ASSERT(rdpdr);
pos = Stream_GetPosition(irp->output);
Stream_SetPosition(irp->output, RDPDR_DEVICE_IO_RESPONSE_LENGTH - 4);
Stream_Write_UINT32(irp->output, irp->IoStatus); /* IoStatus (4 bytes) */
Stream_SetPosition(irp->output, pos);
error = rdpdr_send(rdpdr, irp->output);
irp->output = NULL;
irp_free(irp);
return error;
}
IRP* irp_new(DEVMAN* devman, wStreamPool* pool, wStream* s, wLog* log, UINT* error)
{
IRP* irp = NULL;
DEVICE* device = NULL;
UINT32 DeviceId = 0;
WINPR_ASSERT(devman);
WINPR_ASSERT(pool);
WINPR_ASSERT(s);
if (!Stream_CheckAndLogRequiredLengthWLog(log, s, 20))
{
if (error)
*error = ERROR_INVALID_DATA;
return NULL;
}
Stream_Read_UINT32(s, DeviceId); /* DeviceId (4 bytes) */
device = devman_get_device_by_id(devman, DeviceId);
if (!device)
{
if (error)
*error = ERROR_DEV_NOT_EXIST;
return NULL;
}
irp = (IRP*)winpr_aligned_malloc(sizeof(IRP), MEMORY_ALLOCATION_ALIGNMENT);
if (!irp)
{
WLog_Print(log, WLOG_ERROR, "_aligned_malloc failed!");
if (error)
*error = CHANNEL_RC_NO_MEMORY;
return NULL;
}
ZeroMemory(irp, sizeof(IRP));
Stream_Read_UINT32(s, irp->FileId); /* FileId (4 bytes) */
Stream_Read_UINT32(s, irp->CompletionId); /* CompletionId (4 bytes) */
Stream_Read_UINT32(s, irp->MajorFunction); /* MajorFunction (4 bytes) */
Stream_Read_UINT32(s, irp->MinorFunction); /* MinorFunction (4 bytes) */
Stream_AddRef(s);
irp->input = s;
irp->device = device;
irp->devman = devman;
irp->output = StreamPool_Take(pool, 256);
if (!irp->output)
{
WLog_Print(log, WLOG_ERROR, "Stream_New failed!");
irp_free(irp);
if (error)
*error = CHANNEL_RC_NO_MEMORY;
return NULL;
}
if (!rdpdr_write_iocompletion_header(irp->output, DeviceId, irp->CompletionId, 0))
{
irp_free(irp);
if (error)
*error = CHANNEL_RC_NO_MEMORY;
return NULL;
}
irp->Complete = irp_complete;
irp->Discard = irp_free;
irp->thread = NULL;
irp->cancelled = FALSE;
if (error)
*error = CHANNEL_RC_OK;
return irp;
}
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