FreeRDP/libfreerdp/utils/rdpdr_utils.c

599 lines
19 KiB
C

/**
* FreeRDP: A Remote Desktop Protocol Implementation
* SCard utility functions
*
* Copyright 2021 Armin Novak <armin.novak@thincast.com>
* Copyright 2021 Thincast Technologies GmbH
*
* 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 <winpr/wlog.h>
#include <winpr/print.h>
#include <winpr/smartcard.h>
#include <freerdp/utils/rdpdr_utils.h>
#include <freerdp/channels/scard.h>
#include <freerdp/channels/rdpdr.h>
#include <freerdp/log.h>
#define TAG FREERDP_TAG("utils.scard")
LONG scard_log_status_error(const char* tag, const char* what, LONG status)
{
if (status != SCARD_S_SUCCESS)
{
DWORD level = WLOG_ERROR;
switch (status)
{
case SCARD_E_TIMEOUT:
level = WLOG_DEBUG;
break;
case SCARD_E_NO_READERS_AVAILABLE:
level = WLOG_INFO;
break;
default:
break;
}
WLog_Print(WLog_Get(tag), level, "%s failed with error %s [%" PRId32 "]", what,
SCardGetErrorString(status), status);
}
return status;
}
const char* scard_get_ioctl_string(UINT32 ioControlCode, BOOL funcName)
{
switch (ioControlCode)
{
case SCARD_IOCTL_ESTABLISHCONTEXT:
return funcName ? "SCardEstablishContext" : "SCARD_IOCTL_ESTABLISHCONTEXT";
case SCARD_IOCTL_RELEASECONTEXT:
return funcName ? "SCardReleaseContext" : "SCARD_IOCTL_RELEASECONTEXT";
case SCARD_IOCTL_ISVALIDCONTEXT:
return funcName ? "SCardIsValidContext" : "SCARD_IOCTL_ISVALIDCONTEXT";
case SCARD_IOCTL_LISTREADERGROUPSA:
return funcName ? "SCardListReaderGroupsA" : "SCARD_IOCTL_LISTREADERGROUPSA";
case SCARD_IOCTL_LISTREADERGROUPSW:
return funcName ? "SCardListReaderGroupsW" : "SCARD_IOCTL_LISTREADERGROUPSW";
case SCARD_IOCTL_LISTREADERSA:
return funcName ? "SCardListReadersA" : "SCARD_IOCTL_LISTREADERSA";
case SCARD_IOCTL_LISTREADERSW:
return funcName ? "SCardListReadersW" : "SCARD_IOCTL_LISTREADERSW";
case SCARD_IOCTL_INTRODUCEREADERGROUPA:
return funcName ? "SCardIntroduceReaderGroupA" : "SCARD_IOCTL_INTRODUCEREADERGROUPA";
case SCARD_IOCTL_INTRODUCEREADERGROUPW:
return funcName ? "SCardIntroduceReaderGroupW" : "SCARD_IOCTL_INTRODUCEREADERGROUPW";
case SCARD_IOCTL_FORGETREADERGROUPA:
return funcName ? "SCardForgetReaderGroupA" : "SCARD_IOCTL_FORGETREADERGROUPA";
case SCARD_IOCTL_FORGETREADERGROUPW:
return funcName ? "SCardForgetReaderGroupW" : "SCARD_IOCTL_FORGETREADERGROUPW";
case SCARD_IOCTL_INTRODUCEREADERA:
return funcName ? "SCardIntroduceReaderA" : "SCARD_IOCTL_INTRODUCEREADERA";
case SCARD_IOCTL_INTRODUCEREADERW:
return funcName ? "SCardIntroduceReaderW" : "SCARD_IOCTL_INTRODUCEREADERW";
case SCARD_IOCTL_FORGETREADERA:
return funcName ? "SCardForgetReaderA" : "SCARD_IOCTL_FORGETREADERA";
case SCARD_IOCTL_FORGETREADERW:
return funcName ? "SCardForgetReaderW" : "SCARD_IOCTL_FORGETREADERW";
case SCARD_IOCTL_ADDREADERTOGROUPA:
return funcName ? "SCardAddReaderToGroupA" : "SCARD_IOCTL_ADDREADERTOGROUPA";
case SCARD_IOCTL_ADDREADERTOGROUPW:
return funcName ? "SCardAddReaderToGroupW" : "SCARD_IOCTL_ADDREADERTOGROUPW";
case SCARD_IOCTL_REMOVEREADERFROMGROUPA:
return funcName ? "SCardRemoveReaderFromGroupA" : "SCARD_IOCTL_REMOVEREADERFROMGROUPA";
case SCARD_IOCTL_REMOVEREADERFROMGROUPW:
return funcName ? "SCardRemoveReaderFromGroupW" : "SCARD_IOCTL_REMOVEREADERFROMGROUPW";
case SCARD_IOCTL_LOCATECARDSA:
return funcName ? "SCardLocateCardsA" : "SCARD_IOCTL_LOCATECARDSA";
case SCARD_IOCTL_LOCATECARDSW:
return funcName ? "SCardLocateCardsW" : "SCARD_IOCTL_LOCATECARDSW";
case SCARD_IOCTL_GETSTATUSCHANGEA:
return funcName ? "SCardGetStatusChangeA" : "SCARD_IOCTL_GETSTATUSCHANGEA";
case SCARD_IOCTL_GETSTATUSCHANGEW:
return funcName ? "SCardGetStatusChangeW" : "SCARD_IOCTL_GETSTATUSCHANGEW";
case SCARD_IOCTL_CANCEL:
return funcName ? "SCardCancel" : "SCARD_IOCTL_CANCEL";
case SCARD_IOCTL_CONNECTA:
return funcName ? "SCardConnectA" : "SCARD_IOCTL_CONNECTA";
case SCARD_IOCTL_CONNECTW:
return funcName ? "SCardConnectW" : "SCARD_IOCTL_CONNECTW";
case SCARD_IOCTL_RECONNECT:
return funcName ? "SCardReconnect" : "SCARD_IOCTL_RECONNECT";
case SCARD_IOCTL_DISCONNECT:
return funcName ? "SCardDisconnect" : "SCARD_IOCTL_DISCONNECT";
case SCARD_IOCTL_BEGINTRANSACTION:
return funcName ? "SCardBeginTransaction" : "SCARD_IOCTL_BEGINTRANSACTION";
case SCARD_IOCTL_ENDTRANSACTION:
return funcName ? "SCardEndTransaction" : "SCARD_IOCTL_ENDTRANSACTION";
case SCARD_IOCTL_STATE:
return funcName ? "SCardState" : "SCARD_IOCTL_STATE";
case SCARD_IOCTL_STATUSA:
return funcName ? "SCardStatusA" : "SCARD_IOCTL_STATUSA";
case SCARD_IOCTL_STATUSW:
return funcName ? "SCardStatusW" : "SCARD_IOCTL_STATUSW";
case SCARD_IOCTL_TRANSMIT:
return funcName ? "SCardTransmit" : "SCARD_IOCTL_TRANSMIT";
case SCARD_IOCTL_CONTROL:
return funcName ? "SCardControl" : "SCARD_IOCTL_CONTROL";
case SCARD_IOCTL_GETATTRIB:
return funcName ? "SCardGetAttrib" : "SCARD_IOCTL_GETATTRIB";
case SCARD_IOCTL_SETATTRIB:
return funcName ? "SCardSetAttrib" : "SCARD_IOCTL_SETATTRIB";
case SCARD_IOCTL_ACCESSSTARTEDEVENT:
return funcName ? "SCardAccessStartedEvent" : "SCARD_IOCTL_ACCESSSTARTEDEVENT";
case SCARD_IOCTL_LOCATECARDSBYATRA:
return funcName ? "SCardLocateCardsByATRA" : "SCARD_IOCTL_LOCATECARDSBYATRA";
case SCARD_IOCTL_LOCATECARDSBYATRW:
return funcName ? "SCardLocateCardsByATRB" : "SCARD_IOCTL_LOCATECARDSBYATRW";
case SCARD_IOCTL_READCACHEA:
return funcName ? "SCardReadCacheA" : "SCARD_IOCTL_READCACHEA";
case SCARD_IOCTL_READCACHEW:
return funcName ? "SCardReadCacheW" : "SCARD_IOCTL_READCACHEW";
case SCARD_IOCTL_WRITECACHEA:
return funcName ? "SCardWriteCacheA" : "SCARD_IOCTL_WRITECACHEA";
case SCARD_IOCTL_WRITECACHEW:
return funcName ? "SCardWriteCacheW" : "SCARD_IOCTL_WRITECACHEW";
case SCARD_IOCTL_GETTRANSMITCOUNT:
return funcName ? "SCardGetTransmitCount" : "SCARD_IOCTL_GETTRANSMITCOUNT";
case SCARD_IOCTL_RELEASETARTEDEVENT:
return funcName ? "SCardReleaseStartedEvent" : "SCARD_IOCTL_RELEASETARTEDEVENT";
case SCARD_IOCTL_GETREADERICON:
return funcName ? "SCardGetReaderIcon" : "SCARD_IOCTL_GETREADERICON";
case SCARD_IOCTL_GETDEVICETYPEID:
return funcName ? "SCardGetDeviceTypeId" : "SCARD_IOCTL_GETDEVICETYPEID";
default:
return funcName ? "SCardUnknown" : "SCARD_IOCTL_UNKNOWN";
}
}
const char* rdpdr_component_string(UINT16 component)
{
switch (component)
{
case RDPDR_CTYP_PRN:
return "RDPDR_CTYP_PRN";
case RDPDR_CTYP_CORE:
return "RDPDR_CTYP_CORE";
default:
return "UNKNOWN";
}
}
const char* rdpdr_packetid_string(UINT16 packetid)
{
switch (packetid)
{
case PAKID_CORE_SERVER_ANNOUNCE:
return "PAKID_CORE_SERVER_ANNOUNCE";
case PAKID_CORE_CLIENTID_CONFIRM:
return "PAKID_CORE_CLIENTID_CONFIRM";
case PAKID_CORE_CLIENT_NAME:
return "PAKID_CORE_CLIENT_NAME";
case PAKID_CORE_DEVICELIST_ANNOUNCE:
return "PAKID_CORE_DEVICELIST_ANNOUNCE";
case PAKID_CORE_DEVICE_REPLY:
return "PAKID_CORE_DEVICE_REPLY";
case PAKID_CORE_DEVICE_IOREQUEST:
return "PAKID_CORE_DEVICE_IOREQUEST";
case PAKID_CORE_DEVICE_IOCOMPLETION:
return "PAKID_CORE_DEVICE_IOCOMPLETION";
case PAKID_CORE_SERVER_CAPABILITY:
return "PAKID_CORE_SERVER_CAPABILITY";
case PAKID_CORE_CLIENT_CAPABILITY:
return "PAKID_CORE_CLIENT_CAPABILITY";
case PAKID_CORE_DEVICELIST_REMOVE:
return "PAKID_CORE_DEVICELIST_REMOVE";
case PAKID_CORE_USER_LOGGEDON:
return "PAKID_CORE_USER_LOGGEDON";
case PAKID_PRN_CACHE_DATA:
return "PAKID_PRN_CACHE_DATA";
case PAKID_PRN_USING_XPS:
return "PAKID_PRN_USING_XPS";
default:
return "UNKNOWN";
}
}
BOOL rdpdr_write_iocompletion_header(wStream* out, UINT32 DeviceId, UINT32 CompletionId,
UINT32 ioStatus)
{
WINPR_ASSERT(out);
Stream_SetPosition(out, 0);
if (!Stream_EnsureRemainingCapacity(out, 16))
return FALSE;
Stream_Write_UINT16(out, RDPDR_CTYP_CORE); /* Component (2 bytes) */
Stream_Write_UINT16(out, PAKID_CORE_DEVICE_IOCOMPLETION); /* PacketId (2 bytes) */
Stream_Write_UINT32(out, DeviceId); /* DeviceId (4 bytes) */
Stream_Write_UINT32(out, CompletionId); /* CompletionId (4 bytes) */
Stream_Write_UINT32(out, ioStatus); /* IoStatus (4 bytes) */
return TRUE;
}
static void rdpdr_dump_packet(wLog* log, DWORD lvl, wStream* s, const char* custom, BOOL send)
{
if (!WLog_IsLevelActive(log, lvl))
return;
const size_t gpos = Stream_GetPosition(s);
const size_t pos = send ? Stream_GetPosition(s) : Stream_Length(s);
UINT16 component = 0;
UINT16 packetid = 0;
Stream_SetPosition(s, 0);
if (pos >= 2)
Stream_Read_UINT16(s, component);
if (pos >= 4)
Stream_Read_UINT16(s, packetid);
switch (packetid)
{
case PAKID_CORE_SERVER_ANNOUNCE:
case PAKID_CORE_CLIENTID_CONFIRM:
{
UINT16 versionMajor = 0;
UINT16 versionMinor = 0;
UINT32 clientID = 0;
if (pos >= 6)
Stream_Read_UINT16(s, versionMajor);
if (pos >= 8)
Stream_Read_UINT16(s, versionMinor);
if (pos >= 12)
Stream_Read_UINT32(s, clientID);
WLog_Print(log, lvl,
"%s [%s | %s] [version:%" PRIu16 ".%" PRIu16 "][id:0x%08" PRIx32
"] -> %" PRIuz,
custom, rdpdr_component_string(component), rdpdr_packetid_string(packetid),
versionMajor, versionMinor, clientID, pos);
}
break;
case PAKID_CORE_CLIENT_NAME:
{
char name[256] = { 0 };
UINT32 unicodeFlag = 0;
UINT32 codePage = 0;
UINT32 computerNameLen = 0;
if (pos >= 8)
Stream_Read_UINT32(s, unicodeFlag);
if (pos >= 12)
Stream_Read_UINT32(s, codePage);
if (pos >= 16)
Stream_Read_UINT32(s, computerNameLen);
if (pos >= 16 + computerNameLen)
{
if (unicodeFlag == 0)
Stream_Read(s, name, MIN(sizeof(name), computerNameLen));
else
(void)ConvertWCharNToUtf8(Stream_ConstPointer(s),
computerNameLen / sizeof(WCHAR), name, sizeof(name));
}
WLog_Print(log, lvl,
"%s [%s | %s] [ucs:%" PRIu32 "|cp:%" PRIu32 "][len:0x%08" PRIx32
"] '%s' -> %" PRIuz,
custom, rdpdr_component_string(component), rdpdr_packetid_string(packetid),
unicodeFlag, codePage, computerNameLen, name, pos);
}
break;
case PAKID_CORE_DEVICE_IOREQUEST:
{
UINT32 CompletionId = 0;
UINT32 deviceID = 0;
UINT32 FileId = 0;
UINT32 MajorFunction = 0;
UINT32 MinorFunction = 0;
if (pos >= 8)
Stream_Read_UINT32(s, deviceID);
if (pos >= 12)
Stream_Read_UINT32(s, FileId);
if (pos >= 16)
Stream_Read_UINT32(s, CompletionId);
if (pos >= 20)
Stream_Read_UINT32(s, MajorFunction);
if (pos >= 24)
Stream_Read_UINT32(s, MinorFunction);
WLog_Print(log, lvl,
"%s [%s | %s] [0x%08" PRIx32 "] FileId=0x%08" PRIx32
", CompletionId=0x%08" PRIx32 ", MajorFunction=0x%08" PRIx32
", MinorFunction=0x%08" PRIx32 " -> %" PRIuz,
custom, rdpdr_component_string(component), rdpdr_packetid_string(packetid),
deviceID, FileId, CompletionId, MajorFunction, MinorFunction, pos);
}
break;
case PAKID_CORE_DEVICE_IOCOMPLETION:
{
UINT32 completionID = 0;
UINT32 ioStatus = 0;
UINT32 deviceID = 0;
if (pos >= 8)
Stream_Read_UINT32(s, deviceID);
if (pos >= 12)
Stream_Read_UINT32(s, completionID);
if (pos >= 16)
Stream_Read_UINT32(s, ioStatus);
WLog_Print(log, lvl,
"%s [%s | %s] [0x%08" PRIx32 "] completionID=0x%08" PRIx32
", ioStatus=0x%08" PRIx32 " -> %" PRIuz,
custom, rdpdr_component_string(component), rdpdr_packetid_string(packetid),
deviceID, completionID, ioStatus, pos);
}
break;
case PAKID_CORE_DEVICE_REPLY:
{
UINT32 deviceID = 0;
UINT32 status = 0;
if (pos >= 8)
Stream_Read_UINT32(s, deviceID);
if (pos >= 12)
Stream_Read_UINT32(s, status);
WLog_Print(log, lvl,
"%s [%s | %s] [id:0x%08" PRIx32 ",status=0x%08" PRIx32 "] -> %" PRIuz,
custom, rdpdr_component_string(component), rdpdr_packetid_string(packetid),
deviceID, status, pos);
}
break;
case PAKID_CORE_CLIENT_CAPABILITY:
case PAKID_CORE_SERVER_CAPABILITY:
{
UINT16 numCapabilities = 0;
if (pos >= 6)
Stream_Read_UINT16(s, numCapabilities);
if (pos >= 8)
Stream_Seek_UINT16(s); /* padding */
WLog_Print(log, lvl, "%s [%s | %s] [caps:%" PRIu16 "] -> %" PRIuz, custom,
rdpdr_component_string(component), rdpdr_packetid_string(packetid),
numCapabilities, pos);
for (UINT16 x = 0; x < numCapabilities; x++)
{
RDPDR_CAPABILITY_HEADER header = { 0 };
const UINT error = rdpdr_read_capset_header(log, s, &header);
if (error == CHANNEL_RC_OK)
Stream_Seek(s, header.CapabilityLength);
}
}
break;
case PAKID_CORE_DEVICELIST_ANNOUNCE:
{
size_t offset = 8;
UINT32 count = 0;
if (pos >= offset)
Stream_Read_UINT32(s, count);
WLog_Print(log, lvl, "%s [%s | %s] [%" PRIu32 "] -> %" PRIuz, custom,
rdpdr_component_string(component), rdpdr_packetid_string(packetid), count,
pos);
for (UINT32 x = 0; x < count; x++)
{
RdpdrDevice device = { 0 };
offset += 20;
if (pos >= offset)
{
Stream_Read_UINT32(s, device.DeviceType); /* DeviceType (4 bytes) */
Stream_Read_UINT32(s, device.DeviceId); /* DeviceId (4 bytes) */
Stream_Read(s, device.PreferredDosName, 8); /* PreferredDosName (8 bytes) */
Stream_Read_UINT32(s, device.DeviceDataLength); /* DeviceDataLength (4 bytes) */
device.DeviceData = Stream_Pointer(s);
}
offset += device.DeviceDataLength;
WLog_Print(log, lvl,
"%s [announce][%" PRIu32 "] %s [0x%08" PRIx32
"] '%s' [DeviceDataLength=%" PRIu32 "]",
custom, x, freerdp_rdpdr_dtyp_string(device.DeviceType), device.DeviceId,
device.PreferredDosName, device.DeviceDataLength);
}
}
break;
case PAKID_CORE_DEVICELIST_REMOVE:
{
size_t offset = 8;
UINT32 count = 0;
if (pos >= offset)
Stream_Read_UINT32(s, count);
WLog_Print(log, lvl, "%s [%s | %s] [%" PRIu32 "] -> %" PRIuz, custom,
rdpdr_component_string(component), rdpdr_packetid_string(packetid), count,
pos);
for (UINT32 x = 0; x < count; x++)
{
UINT32 id = 0;
offset += 4;
if (pos >= offset)
Stream_Read_UINT32(s, id);
WLog_Print(log, lvl, "%s [remove][%" PRIu32 "] id=%" PRIu32, custom, x, id);
}
}
break;
case PAKID_CORE_USER_LOGGEDON:
WLog_Print(log, lvl, "%s [%s | %s] -> %" PRIuz, custom,
rdpdr_component_string(component), rdpdr_packetid_string(packetid), pos);
break;
default:
{
WLog_Print(log, lvl, "%s [%s | %s] -> %" PRIuz, custom,
rdpdr_component_string(component), rdpdr_packetid_string(packetid), pos);
}
break;
}
// winpr_HexLogDump(log, lvl, Stream_Buffer(s), pos);
Stream_SetPosition(s, gpos);
}
void rdpdr_dump_received_packet(wLog* log, DWORD lvl, wStream* s, const char* custom)
{
rdpdr_dump_packet(log, lvl, s, custom, FALSE);
}
void rdpdr_dump_send_packet(wLog* log, DWORD lvl, wStream* s, const char* custom)
{
rdpdr_dump_packet(log, lvl, s, custom, TRUE);
}
const char* rdpdr_irp_string(UINT32 major)
{
switch (major)
{
case IRP_MJ_CREATE:
return "IRP_MJ_CREATE";
case IRP_MJ_CLOSE:
return "IRP_MJ_CLOSE";
case IRP_MJ_READ:
return "IRP_MJ_READ";
case IRP_MJ_WRITE:
return "IRP_MJ_WRITE";
case IRP_MJ_DEVICE_CONTROL:
return "IRP_MJ_DEVICE_CONTROL";
case IRP_MJ_QUERY_VOLUME_INFORMATION:
return "IRP_MJ_QUERY_VOLUME_INFORMATION";
case IRP_MJ_SET_VOLUME_INFORMATION:
return "IRP_MJ_SET_VOLUME_INFORMATION";
case IRP_MJ_QUERY_INFORMATION:
return "IRP_MJ_QUERY_INFORMATION";
case IRP_MJ_SET_INFORMATION:
return "IRP_MJ_SET_INFORMATION";
case IRP_MJ_DIRECTORY_CONTROL:
return "IRP_MJ_DIRECTORY_CONTROL";
case IRP_MJ_LOCK_CONTROL:
return "IRP_MJ_LOCK_CONTROL";
default:
return "IRP_UNKNOWN";
}
}
const char* rdpdr_cap_type_string(UINT16 capability)
{
switch (capability)
{
case CAP_GENERAL_TYPE:
return "CAP_GENERAL_TYPE";
case CAP_PRINTER_TYPE:
return "CAP_PRINTER_TYPE";
case CAP_PORT_TYPE:
return "CAP_PORT_TYPE";
case CAP_DRIVE_TYPE:
return "CAP_DRIVE_TYPE";
case CAP_SMARTCARD_TYPE:
return "CAP_SMARTCARD_TYPE";
default:
return "CAP_UNKNOWN";
}
}
UINT rdpdr_read_capset_header(wLog* log, wStream* s, RDPDR_CAPABILITY_HEADER* header)
{
WINPR_ASSERT(header);
if (!Stream_CheckAndLogRequiredLengthWLog(log, s, 8))
return ERROR_INVALID_DATA;
Stream_Read_UINT16(s, header->CapabilityType); /* CapabilityType (2 bytes) */
Stream_Read_UINT16(s, header->CapabilityLength); /* CapabilityLength (2 bytes) */
Stream_Read_UINT32(s, header->Version); /* Version (4 bytes) */
WLog_Print(log, WLOG_TRACE,
"capability %s [0x%04" PRIx16 "] got version %" PRIu32 ", length %" PRIu16,
rdpdr_cap_type_string(header->CapabilityType), header->CapabilityType,
header->Version, header->CapabilityLength);
if (header->CapabilityLength < 8)
{
WLog_Print(log, WLOG_ERROR, "capability %s got short length %" PRIu32,
rdpdr_cap_type_string(header->CapabilityType), header->CapabilityLength);
return ERROR_INVALID_DATA;
}
header->CapabilityLength -= 8;
if (!Stream_CheckAndLogRequiredLengthWLog(log, s, header->CapabilityLength))
return ERROR_INVALID_DATA;
return CHANNEL_RC_OK;
}
UINT rdpdr_write_capset_header(wLog* log, wStream* s, const RDPDR_CAPABILITY_HEADER* header)
{
WINPR_ASSERT(header);
WINPR_ASSERT(header->CapabilityLength >= 8);
if (!Stream_EnsureRemainingCapacity(s, header->CapabilityLength))
{
WLog_Print(log, WLOG_ERROR, "not enough data in stream!");
return ERROR_INVALID_DATA;
}
WLog_Print(log, WLOG_TRACE, "writing capability %s version %" PRIu32 ", length %" PRIu16,
rdpdr_cap_type_string(header->CapabilityType), header->Version,
header->CapabilityLength);
Stream_Write_UINT16(s, header->CapabilityType); /* CapabilityType (2 bytes) */
Stream_Write_UINT16(s, header->CapabilityLength); /* CapabilityLength (2 bytes) */
Stream_Write_UINT32(s, header->Version); /* Version (4 bytes) */
return CHANNEL_RC_OK;
}