FreeRDP/channels/rdpdr/client/rdpdr_capabilities.c
2016-02-02 17:59:56 +01:00

263 lines
7.0 KiB
C

/**
* 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 2015-2016 Thincast Technologies GmbH
* Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.com>
* Copyright 2016 Armin Novak <armin.novak@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/stream.h>
#include "rdpdr_main.h"
#include "rdpdr_capabilities.h"
/* Output device redirection capability set header */
static void rdpdr_write_capset_header(wStream* s, UINT16 capabilityType, UINT16 capabilityLength, UINT32 version)
{
Stream_Write_UINT16(s, capabilityType);
Stream_Write_UINT16(s, capabilityLength);
Stream_Write_UINT32(s, version);
}
/* Output device direction general capability set */
static void rdpdr_write_general_capset(rdpdrPlugin* rdpdr, wStream* s)
{
rdpdr_write_capset_header(s, CAP_GENERAL_TYPE, 44, GENERAL_CAPABILITY_VERSION_02);
Stream_Write_UINT32(s, 0); /* osType, ignored on receipt */
Stream_Write_UINT32(s, 0); /* osVersion, unused and must be set to zero */
Stream_Write_UINT16(s, 1); /* protocolMajorVersion, must be set to 1 */
Stream_Write_UINT16(s, RDPDR_MINOR_RDP_VERSION_5_2); /* protocolMinorVersion */
Stream_Write_UINT32(s, 0x0000FFFF); /* ioCode1 */
Stream_Write_UINT32(s, 0); /* ioCode2, must be set to zero, reserved for future use */
Stream_Write_UINT32(s, RDPDR_DEVICE_REMOVE_PDUS | RDPDR_CLIENT_DISPLAY_NAME_PDU | RDPDR_USER_LOGGEDON_PDU); /* extendedPDU */
Stream_Write_UINT32(s, ENABLE_ASYNCIO); /* extraFlags1 */
Stream_Write_UINT32(s, 0); /* extraFlags2, must be set to zero, reserved for future use */
Stream_Write_UINT32(s, 0); /* SpecialTypeDeviceCap, number of special devices to be redirected before logon */
}
/* Process device direction general capability set */
static UINT rdpdr_process_general_capset(rdpdrPlugin* rdpdr, wStream* s)
{
UINT16 capabilityLength;
if (Stream_GetRemainingLength(s) < 2)
return CHANNEL_RC_NO_BUFFER;
Stream_Read_UINT16(s, capabilityLength);
if (Stream_GetRemainingLength(s) < capabilityLength - 4)
return CHANNEL_RC_NO_BUFFER;
Stream_Seek(s, capabilityLength - 4);
return CHANNEL_RC_OK;
}
/* Output printer direction capability set */
static void rdpdr_write_printer_capset(rdpdrPlugin* rdpdr, wStream* s)
{
rdpdr_write_capset_header(s, CAP_PRINTER_TYPE, 8, PRINT_CAPABILITY_VERSION_01);
}
/* Process printer direction capability set */
static UINT rdpdr_process_printer_capset(rdpdrPlugin* rdpdr, wStream* s)
{
UINT16 capabilityLength;
if (Stream_GetRemainingLength(s) < 2)
return CHANNEL_RC_NO_BUFFER;
Stream_Read_UINT16(s, capabilityLength);
if (Stream_GetRemainingLength(s) < capabilityLength - 4)
return CHANNEL_RC_NO_BUFFER;
Stream_Seek(s, capabilityLength - 4);
return CHANNEL_RC_OK;
}
/* Output port redirection capability set */
static void rdpdr_write_port_capset(rdpdrPlugin* rdpdr, wStream* s)
{
rdpdr_write_capset_header(s, CAP_PORT_TYPE, 8, PORT_CAPABILITY_VERSION_01);
}
/* Process port redirection capability set */
static UINT rdpdr_process_port_capset(rdpdrPlugin* rdpdr, wStream* s)
{
UINT16 capabilityLength;
if (Stream_GetRemainingLength(s) < 2)
return CHANNEL_RC_NO_BUFFER;
Stream_Read_UINT16(s, capabilityLength);
if (Stream_GetRemainingLength(s) < capabilityLength - 4)
return CHANNEL_RC_NO_BUFFER;
Stream_Seek(s, capabilityLength - 4);
return CHANNEL_RC_OK;
}
/* Output drive redirection capability set */
static void rdpdr_write_drive_capset(rdpdrPlugin* rdpdr, wStream* s)
{
rdpdr_write_capset_header(s, CAP_DRIVE_TYPE, 8, DRIVE_CAPABILITY_VERSION_02);
}
/* Process drive redirection capability set */
static UINT rdpdr_process_drive_capset(rdpdrPlugin* rdpdr, wStream* s)
{
UINT16 capabilityLength;
if (Stream_GetRemainingLength(s) < 2)
return CHANNEL_RC_NO_BUFFER;
Stream_Read_UINT16(s, capabilityLength);
if (Stream_GetRemainingLength(s) < capabilityLength - 4)
return CHANNEL_RC_NO_BUFFER;
Stream_Seek(s, capabilityLength - 4);
return CHANNEL_RC_OK;
}
/* Output smart card redirection capability set */
static void rdpdr_write_smartcard_capset(rdpdrPlugin* rdpdr, wStream* s)
{
rdpdr_write_capset_header(s, CAP_SMARTCARD_TYPE, 8, SMARTCARD_CAPABILITY_VERSION_01);
}
/* Process smartcard redirection capability set */
static UINT rdpdr_process_smartcard_capset(rdpdrPlugin* rdpdr, wStream* s)
{
UINT16 capabilityLength;
if (Stream_GetRemainingLength(s) < 2)
return CHANNEL_RC_NO_BUFFER;
Stream_Read_UINT16(s, capabilityLength);
if (Stream_GetRemainingLength(s) < capabilityLength - 4)
return CHANNEL_RC_NO_BUFFER;
Stream_Seek(s, capabilityLength - 4);
return CHANNEL_RC_OK;
}
UINT rdpdr_process_capability_request(rdpdrPlugin* rdpdr, wStream* s)
{
UINT status = CHANNEL_RC_OK;
UINT16 i;
UINT16 numCapabilities;
UINT16 capabilityType;
if (!rdpdr || !s)
return CHANNEL_RC_NULL_DATA;
if (Stream_GetRemainingLength(s) < 4)
return CHANNEL_RC_NO_BUFFER;
Stream_Read_UINT16(s, numCapabilities);
Stream_Seek(s, 2); /* pad (2 bytes) */
for (i = 0; i < numCapabilities; i++)
{
if (Stream_GetRemainingLength(s) < sizeof(UINT16))
return CHANNEL_RC_NO_BUFFER;
Stream_Read_UINT16(s, capabilityType);
switch (capabilityType)
{
case CAP_GENERAL_TYPE:
status = rdpdr_process_general_capset(rdpdr, s);
break;
case CAP_PRINTER_TYPE:
status = rdpdr_process_printer_capset(rdpdr, s);
break;
case CAP_PORT_TYPE:
status = rdpdr_process_port_capset(rdpdr, s);
break;
case CAP_DRIVE_TYPE:
status = rdpdr_process_drive_capset(rdpdr, s);
break;
case CAP_SMARTCARD_TYPE:
status = rdpdr_process_smartcard_capset(rdpdr, s);
break;
default:
break;
}
if (status != CHANNEL_RC_OK)
return status;
}
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
UINT rdpdr_send_capability_response(rdpdrPlugin* rdpdr)
{
wStream* s;
s = Stream_New(NULL, 256);
if (!s)
{
WLog_ERR(TAG, "Stream_New failed!");
return CHANNEL_RC_NO_MEMORY;
}
Stream_Write_UINT16(s, RDPDR_CTYP_CORE);
Stream_Write_UINT16(s, PAKID_CORE_CLIENT_CAPABILITY);
Stream_Write_UINT16(s, 5); /* numCapabilities */
Stream_Write_UINT16(s, 0); /* pad */
rdpdr_write_general_capset(rdpdr, s);
rdpdr_write_printer_capset(rdpdr, s);
rdpdr_write_port_capset(rdpdr, s);
rdpdr_write_drive_capset(rdpdr, s);
rdpdr_write_smartcard_capset(rdpdr, s);
return rdpdr_send(rdpdr, s);
}