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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 2015-2016 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.
*/
#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 "rdpdr_capabilities.h"
#define RDPDR_CAPABILITY_HEADER_LENGTH 8
/* Output device direction general capability set */
static void rdpdr_write_general_capset(rdpdrPlugin* rdpdr, wStream* s)
{
WINPR_UNUSED(rdpdr);
const RDPDR_CAPABILITY_HEADER header = { CAP_GENERAL_TYPE, RDPDR_CAPABILITY_HEADER_LENGTH + 36,
GENERAL_CAPABILITY_VERSION_02 };
const UINT32 ioCode1 = rdpdr->clientIOCode1 & rdpdr->serverIOCode1;
const UINT32 ioCode2 = rdpdr->clientIOCode2 & rdpdr->serverIOCode2;
rdpdr_write_capset_header(rdpdr->log, s, &header);
Stream_Write_UINT32(s, rdpdr->clientOsType); /* osType, ignored on receipt */
Stream_Write_UINT32(s, rdpdr->clientOsVersion); /* osVersion, unused and must be set to zero */
Stream_Write_UINT16(s, rdpdr->clientVersionMajor); /* protocolMajorVersion, must be set to 1 */
Stream_Write_UINT16(s, rdpdr->clientVersionMinor); /* protocolMinorVersion */
Stream_Write_UINT32(s, ioCode1); /* ioCode1 */
Stream_Write_UINT32(s, ioCode2); /* ioCode2, must be set to zero, reserved for future use */
Stream_Write_UINT32(s, rdpdr->clientExtendedPDU); /* extendedPDU */
Stream_Write_UINT32(s, rdpdr->clientExtraFlags1); /* extraFlags1 */
Stream_Write_UINT32(
s,
rdpdr->clientExtraFlags2); /* extraFlags2, must be set to zero, reserved for future use */
Stream_Write_UINT32(
s, rdpdr->clientSpecialTypeDeviceCap); /* 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,
const RDPDR_CAPABILITY_HEADER* header)
{
WINPR_ASSERT(header);
if (header->CapabilityLength != 36)
{
WLog_Print(rdpdr->log, WLOG_ERROR,
"CAP_GENERAL_TYPE::CapabilityLength expected 36, got %" PRIu32,
header->CapabilityLength);
return ERROR_INVALID_DATA;
}
if (!Stream_CheckAndLogRequiredLengthWLog(rdpdr->log, s, 36))
return ERROR_INVALID_DATA;
Stream_Read_UINT32(s, rdpdr->serverOsType); /* osType, ignored on receipt */
Stream_Read_UINT32(s, rdpdr->serverOsVersion); /* osVersion, unused and must be set to zero */
Stream_Read_UINT16(s, rdpdr->serverVersionMajor); /* protocolMajorVersion, must be set to 1 */
Stream_Read_UINT16(s, rdpdr->serverVersionMinor); /* protocolMinorVersion */
Stream_Read_UINT32(s, rdpdr->serverIOCode1); /* ioCode1 */
Stream_Read_UINT32(
s, rdpdr->serverIOCode2); /* ioCode2, must be set to zero, reserved for future use */
Stream_Read_UINT32(s, rdpdr->serverExtendedPDU); /* extendedPDU */
Stream_Read_UINT32(s, rdpdr->serverExtraFlags1); /* extraFlags1 */
Stream_Read_UINT32(
s,
rdpdr->serverExtraFlags2); /* extraFlags2, must be set to zero, reserved for future use */
Stream_Read_UINT32(
s, rdpdr->serverSpecialTypeDeviceCap); /* SpecialTypeDeviceCap, number of special devices to
be redirected before logon */
return CHANNEL_RC_OK;
}
/* Output printer direction capability set */
static void rdpdr_write_printer_capset(rdpdrPlugin* rdpdr, wStream* s)
{
WINPR_UNUSED(rdpdr);
const RDPDR_CAPABILITY_HEADER header = { CAP_PRINTER_TYPE, RDPDR_CAPABILITY_HEADER_LENGTH,
PRINT_CAPABILITY_VERSION_01 };
rdpdr_write_capset_header(rdpdr->log, s, &header);
}
/* Process printer direction capability set */
static UINT rdpdr_process_printer_capset(rdpdrPlugin* rdpdr, wStream* s,
const RDPDR_CAPABILITY_HEADER* header)
{
WINPR_ASSERT(header);
Stream_Seek(s, header->CapabilityLength);
return CHANNEL_RC_OK;
}
/* Output port redirection capability set */
static void rdpdr_write_port_capset(rdpdrPlugin* rdpdr, wStream* s)
{
WINPR_UNUSED(rdpdr);
const RDPDR_CAPABILITY_HEADER header = { CAP_PORT_TYPE, RDPDR_CAPABILITY_HEADER_LENGTH,
PORT_CAPABILITY_VERSION_01 };
rdpdr_write_capset_header(rdpdr->log, s, &header);
}
/* Process port redirection capability set */
static UINT rdpdr_process_port_capset(rdpdrPlugin* rdpdr, wStream* s,
const RDPDR_CAPABILITY_HEADER* header)
{
WINPR_ASSERT(header);
Stream_Seek(s, header->CapabilityLength);
return CHANNEL_RC_OK;
}
/* Output drive redirection capability set */
static void rdpdr_write_drive_capset(rdpdrPlugin* rdpdr, wStream* s)
{
WINPR_UNUSED(rdpdr);
const RDPDR_CAPABILITY_HEADER header = { CAP_DRIVE_TYPE, RDPDR_CAPABILITY_HEADER_LENGTH,
DRIVE_CAPABILITY_VERSION_02 };
rdpdr_write_capset_header(rdpdr->log, s, &header);
}
/* Process drive redirection capability set */
static UINT rdpdr_process_drive_capset(rdpdrPlugin* rdpdr, wStream* s,
const RDPDR_CAPABILITY_HEADER* header)
{
WINPR_ASSERT(header);
Stream_Seek(s, header->CapabilityLength);
return CHANNEL_RC_OK;
}
/* Output smart card redirection capability set */
static void rdpdr_write_smartcard_capset(rdpdrPlugin* rdpdr, wStream* s)
{
WINPR_UNUSED(rdpdr);
const RDPDR_CAPABILITY_HEADER header = { CAP_SMARTCARD_TYPE, RDPDR_CAPABILITY_HEADER_LENGTH,
SMARTCARD_CAPABILITY_VERSION_01 };
rdpdr_write_capset_header(rdpdr->log, s, &header);
}
/* Process smartcard redirection capability set */
static UINT rdpdr_process_smartcard_capset(rdpdrPlugin* rdpdr, wStream* s,
const RDPDR_CAPABILITY_HEADER* header)
{
WINPR_ASSERT(header);
Stream_Seek(s, header->CapabilityLength);
return CHANNEL_RC_OK;
}
UINT rdpdr_process_capability_request(rdpdrPlugin* rdpdr, wStream* s)
{
UINT status = CHANNEL_RC_OK;
UINT16 numCapabilities = 0;
if (!rdpdr || !s)
return CHANNEL_RC_NULL_DATA;
WINPR_ASSERT(rdpdr->state == RDPDR_CHANNEL_STATE_SERVER_CAPS);
rdpdr_state_advance(rdpdr, RDPDR_CHANNEL_STATE_CLIENT_CAPS);
if (!Stream_CheckAndLogRequiredLengthWLog(rdpdr->log, s, 4))
return ERROR_INVALID_DATA;
Stream_Read_UINT16(s, numCapabilities);
Stream_Seek(s, 2); /* pad (2 bytes) */
for (UINT16 i = 0; i < numCapabilities; i++)
{
RDPDR_CAPABILITY_HEADER header = { 0 };
UINT error = rdpdr_read_capset_header(rdpdr->log, s, &header);
if (error != CHANNEL_RC_OK)
return error;
switch (header.CapabilityType)
{
case CAP_GENERAL_TYPE:
status = rdpdr_process_general_capset(rdpdr, s, &header);
break;
case CAP_PRINTER_TYPE:
status = rdpdr_process_printer_capset(rdpdr, s, &header);
break;
case CAP_PORT_TYPE:
status = rdpdr_process_port_capset(rdpdr, s, &header);
break;
case CAP_DRIVE_TYPE:
status = rdpdr_process_drive_capset(rdpdr, s, &header);
break;
case CAP_SMARTCARD_TYPE:
status = rdpdr_process_smartcard_capset(rdpdr, s, &header);
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 = NULL;
WINPR_ASSERT(rdpdr);
s = StreamPool_Take(rdpdr->pool, 256);
if (!s)
{
WLog_Print(rdpdr->log, WLOG_ERROR, "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);
}
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