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windows-server-2003/net/irda/irtranp/scep.cpp

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//--------------------------------------------------------------------
// Copyright (C)1998 Microsoft Corporation, All Rights Reserved.
//
// scep.cpp
//
// This file holds most of the implementation of CSCEP_CONNECTION
// objects. Each active connection to a camera is represented by
// a separate CSCEP_CONNECTION object. The CSCEP_CONNECTION is then
// destroyed when the connection (socket) to the camera is closed.
//
// Author:
//
// Edward Reus (edwardr) 02-24-98 Initial coding.
//
//--------------------------------------------------------------------
#include "precomp.h"
typedef struct _ATTRIBUTE_TOKEN
{
DWORD dwTokenType;
UCHAR *pChars;
DWORD dwSize;
} ATTRIBUTE_TOKEN;
#define ATTRIBUTE_NAME_SIZE 2
#define COLON ':'
#define ONE '1'
#define SPACE ' '
#define TAB '\t'
#define CR 0x0d
#define LF 0x0a
#define ATTRIBUTE_NAME 0
#define ATTRIBUTE_COLON 1
#define ATTRIBUTE_VALUE 2
#define ATTRIBUTE_CRLF 3
#define ATTR_PDU_SIZE 0
#define ATTR_PRODUCT_ID 1
#define ATTR_USER_NAME 2
#define ATTR_PASSWORD 3
//--------------------------------------------------------------------
// Globals:
//--------------------------------------------------------------------
static DWORD g_adwPduSizes[]
= { PDU_SIZE_1, PDU_SIZE_2, PDU_SIZE_3, PDU_SIZE_4 };
#ifdef DBG_MEM
static LONG g_lCScepConnectionCount = 0;
#endif
//--------------------------------------------------------------------
// SkipBlanks()
//
//--------------------------------------------------------------------
void SkipBlanks( IN OUT UCHAR **ppAttributes,
IN OUT DWORD *pdwAttributeSize )
{
while ( (*pdwAttributeSize > 0)
&& ((**ppAttributes == SPACE)||(**ppAttributes == TAB)) )
{
(*ppAttributes)++;
(*pdwAttributeSize)--;
}
}
//--------------------------------------------------------------------
// NextToken()
//
//--------------------------------------------------------------------
ATTRIBUTE_TOKEN *NextToken( IN DWORD dwTokenType,
IN OUT UCHAR **ppAttributes,
IN OUT DWORD *pdwAttributeSize )
{
ATTRIBUTE_TOKEN *pToken = 0;
SkipBlanks(ppAttributes,pdwAttributeSize);
if ((!*ppAttributes) || (*pdwAttributeSize == 0))
{
return 0;
}
pToken = (ATTRIBUTE_TOKEN*)AllocateMemory(sizeof(ATTRIBUTE_TOKEN));
if (!pToken)
{
return 0;
}
pToken->dwTokenType = dwTokenType;
switch (dwTokenType)
{
case ATTRIBUTE_NAME:
if (*pdwAttributeSize < ATTRIBUTE_NAME_SIZE)
{
FreeMemory(pToken);
pToken = 0;
break;
}
pToken->pChars = *ppAttributes;
pToken->dwSize = ATTRIBUTE_NAME_SIZE;
*ppAttributes += ATTRIBUTE_NAME_SIZE;
*pdwAttributeSize -= ATTRIBUTE_NAME_SIZE;
break;
case ATTRIBUTE_COLON:
if (**ppAttributes == COLON)
{
pToken->pChars = *ppAttributes;
pToken->dwSize = 1;
*ppAttributes += 1;
*pdwAttributeSize -= 1;
}
break;
case ATTRIBUTE_VALUE:
pToken->pChars = *ppAttributes;
pToken->dwSize = 0;
while ((**ppAttributes != CR) && (*pdwAttributeSize > 0))
{
(*ppAttributes)++;
(*pdwAttributeSize)--;
(pToken->dwSize)++;
}
break;
case ATTRIBUTE_CRLF:
pToken->pChars = *ppAttributes;
pToken->dwSize = 2;
*ppAttributes += 2;
*pdwAttributeSize -= 2;
if ((pToken->pChars[0] != CR)||(pToken->pChars[1] != LF))
{
FreeMemory(pToken);
pToken = 0;
}
break;
default:
FreeMemory(pToken);
pToken = 0;
break;
}
return pToken;
}
//--------------------------------------------------------------------
// IsAttributeName()
//
//--------------------------------------------------------------------
BOOL IsAttributeName( ATTRIBUTE_TOKEN *pToken,
int *piAttribute )
{
BOOL fIsName = FALSE;
if ((pToken->pChars[0] == 'f')&&(pToken->pChars[1] == 'r'))
{
fIsName = TRUE;
*piAttribute = ATTR_PDU_SIZE;
}
else
if ((pToken->pChars[0] == 'i')&&(pToken->pChars[1] == 'd'))
{
fIsName = TRUE;
*piAttribute = ATTR_PRODUCT_ID;
}
else
if ((pToken->pChars[0] == 'n')&&(pToken->pChars[1] == 'm'))
{
fIsName = TRUE;
*piAttribute = ATTR_USER_NAME;
}
else
if ((pToken->pChars[0] == 'p')&&(pToken->pChars[1] == 'w'))
{
fIsName = TRUE;
*piAttribute = ATTR_PASSWORD;
}
return fIsName;
}
//--------------------------------------------------------------------
// NewTokenString()
//
//--------------------------------------------------------------------
UCHAR *NewTokenString( IN ATTRIBUTE_TOKEN *pToken,
OUT DWORD *pdwStatus )
{
UCHAR *pszNewStr = (UCHAR*)AllocateMemory(1+pToken->dwSize);
if (!pszNewStr)
{
*pdwStatus = ERROR_IRTRANP_OUT_OF_MEMORY;
return 0;
}
memcpy(pszNewStr,pToken->pChars,pToken->dwSize);
pszNewStr[pToken->dwSize] = 0;
return pszNewStr;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::CSCEP_CONNECTION()
//
//--------------------------------------------------------------------
CSCEP_CONNECTION::CSCEP_CONNECTION()
{
m_dwConnectionState = STATE_CLOSED;
m_dwPduSendSize = PDU_SIZE_1; // default is 512 bytes.
m_dwPduReceiveSize = PDU_SIZE_4;
m_CFlag = 0;
m_pPrimaryMachineId = 0;
m_pSecondaryMachineId = 0;
m_DestPid = DEFAULT_PID;
m_SrcPid = DEFAULT_PID;
m_pszUserName = 0;
m_pszPassword = 0;
m_pAssembleBuffer = 0;
m_dwAssembleBufferSize = 0;
m_dwMaxAssembleBufferSize = 0;
m_fDidByteSwap = FALSE;
m_Fragmented = FALSE;
m_DFlag = 0;
m_dwSequenceNo = 0;
m_dwRestNo = 0;
m_dwCommandId = 0;
m_pCommandHeader = 0;
m_pszFileName = 0;
m_pszLongFileName = 0;
m_pwszFileName = 0;
m_CreateTime.dwLowDateTime = 0; // Picture create date/time.
m_CreateTime.dwHighDateTime = 0;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::~CSCEP_CONNECTION()
//
//--------------------------------------------------------------------
CSCEP_CONNECTION::~CSCEP_CONNECTION()
{
if (m_pPrimaryMachineId)
{
FreeMemory(m_pPrimaryMachineId);
}
if (m_pSecondaryMachineId)
{
FreeMemory(m_pSecondaryMachineId);
}
if (m_pszUserName)
{
FreeMemory(m_pszUserName);
}
if (m_pszPassword)
{
FreeMemory(m_pszPassword);
}
if (m_pAssembleBuffer)
{
FreeMemory(m_pAssembleBuffer);
}
if (m_pCommandHeader)
{
FreeMemory(m_pCommandHeader);
}
if (m_pszFileName)
{
FreeMemory(m_pszFileName);
}
if (m_pszLongFileName)
{
FreeMemory(m_pszLongFileName);
}
if (m_pwszFileName)
{
FreeMemory(m_pwszFileName);
}
}
//------------------------------------------------------------------------
// CSCEP_CONNECTION::operator new()
//
//------------------------------------------------------------------------
void *CSCEP_CONNECTION::operator new( IN size_t Size )
{
void *pObj = AllocateMemory(Size);
#ifdef DBG_MEM
if (pObj)
{
InterlockedIncrement(&g_lCScepConnectionCount);
}
#endif
return pObj;
}
//------------------------------------------------------------------------
// CSCEP_CONNECTION::operator delete()
//
//------------------------------------------------------------------------
void CSCEP_CONNECTION::operator delete( IN void *pObj,
IN size_t Size )
{
if (pObj)
{
DWORD dwStatus = FreeMemory(pObj);
#ifdef DBG_MEM
if (dwStatus)
{
DbgPrint("IrXfer: IrTran-P: CSCEP_CONNECTION::delete: FreeMemory() Failed: %d\n"dwStatus);
}
InterlockedDecrement(&g_lCScepConnectionCount);
if (g_lCScepConnectionCount < 0)
{
DbgPrint("IrXfer: IrTran-P: CSCEP_CONNECTION::delete: Count: %d\n",
g_lCScepConnectionCount);
}
#endif
}
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::AssemblePdu()
//
// Take in bits of data as its read in. When a complete SCEP PDU has
// been read and assembled return it.
//
// pInputData - This is the data that just came in.
//
// dwInputDataSize - Size in bytes of pInputData.
//
// ppPdu - Returns a complete SCEP PDU when this function
// returns NO_ERROR, otherwise set to 0.
//
// pdwPduSize - Size of the returned PDU.
//
// Return values:
//
// NO_ERROR - A new SCEP PDU is complete and ready.
// ERROR_CONTINUE - Data read so far is Ok, still waiting for more.
// ERROR_SCEP_INVALID_PROTOCOL
// ERROR_IRTRANP_OUT_OF_MEMORY
//
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::AssemblePdu( IN void *pInputData,
IN DWORD dwInputDataSize,
OUT SCEP_HEADER **ppPdu,
OUT DWORD *pdwPduSize )
{
DWORD dwStatus = ERROR_CONTINUE;
UCHAR *pEnd;
if (dwInputDataSize > MAX_PDU_SIZE)
return ERROR_SCEP_INVALID_PROTOCOL;
*ppPdu = 0;
*pdwPduSize = 0;
if (dwInputDataSize > 0)
{
if (!m_pAssembleBuffer)
{
m_dwMaxAssembleBufferSize = 2*MAX_PDU_SIZE;
m_pAssembleBuffer
= (UCHAR*)AllocateMemory(m_dwMaxAssembleBufferSize);
if (!m_pAssembleBuffer)
{
return ERROR_IRTRANP_OUT_OF_MEMORY;
}
memcpy(m_pAssembleBuffer,pInputData,dwInputDataSize);
m_dwAssembleBufferSize = dwInputDataSize;
#ifdef DBG_ASSEMBLE
DbgPrint("Assemble: Start: %d\n",m_dwAssembleBufferSize);
#endif
}
else
{
if (m_dwAssembleBufferSize+dwInputDataSize >= m_dwMaxAssembleBufferSize)
{
#ifdef DBG_ERROR
DbgPrint("CSCEP_CONNECTION::AssemblePdu(): Buffer Overrun!\n");
#endif
return ERROR_SCEP_INVALID_PROTOCOL;
}
pEnd = &(m_pAssembleBuffer[m_dwAssembleBufferSize]);
memcpy(pEnd,pInputData,dwInputDataSize);
m_dwAssembleBufferSize += dwInputDataSize;
#ifdef DBG_ASSEMBLE
DbgPrint("Assemble: Add: %d NewSize: %d\n",
dwInputDataSize,m_dwAssembleBufferSize);
#endif
}
}
// Check to see if enough data has come in for a complete PDU.
dwStatus = CheckPdu(ppPdu,pdwPduSize);
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::CheckPdu()
//
// Run through the "current" PDU and see if its complete. If its
// not yet complete, return ERROR_CONTINUE. If it is complete then
// return NO_ERROR.
//
// Return values:
//
// NO_ERROR - The current SCEP PDU is complete and ready.
// ERROR_CONTINUE - Data read so far is Ok, still waiting for more.
// ERROR_SCEP_INVALID_PROTOCOL
// ERROR_IRTRANP_OUT_OF_MEMORY
//
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::CheckPdu( OUT SCEP_HEADER **ppPdu,
OUT DWORD *pdwPduSize )
{
DWORD dwStatus;
DWORD dwSize;
SCEP_NEGOTIATION *pInfNegotiation;
if (m_dwAssembleBufferSize < 2)
{
return ERROR_CONTINUE;
}
switch ( ((SCEP_HEADER*)m_pAssembleBuffer)->MsgType )
{
case MSG_TYPE_CONNECT_REQ:
dwStatus = CheckConnectPdu(ppPdu,pdwPduSize);
break;
case MSG_TYPE_CONNECT_RESP:
dwStatus = CheckConnectRespPdu(ppPdu,pdwPduSize);
break;
case MSG_TYPE_DATA:
dwStatus = CheckDataPdu(ppPdu,pdwPduSize);
break;
case MSG_TYPE_DISCONNECT:
dwStatus = CheckDisconnectPdu(ppPdu,pdwPduSize);
break;
default:
#ifdef DBG_ERROR
DbgPrint("CheckPdu(): Invalid Msgtype: %d\n",
((SCEP_HEADER*)m_pAssembleBuffer)->MsgType );
#endif
dwStatus = ERROR_SCEP_INVALID_PROTOCOL;
break;
}
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::CheckConnectPdu()
//
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::CheckConnectPdu( OUT SCEP_HEADER **ppPdu,
OUT DWORD *pdwPduSize )
{
DWORD dwStatus;
DWORD dwSize;
SCEP_VERSION *pInfVersion;
SCEP_NEGOTIATION *pInfNegotiation;
SCEP_EXTEND *pInfExtend;
ASSERT( ((SCEP_HEADER*)m_pAssembleBuffer)->MsgType
== MSG_TYPE_CONNECT_REQ);
if (m_dwAssembleBufferSize < MIN_PDU_SIZE_CONNECT)
{
return ERROR_CONTINUE;
}
if (m_dwAssembleBufferSize > MAX_PDU_SIZE_CONNECT)
{
return ERROR_SCEP_INVALID_PROTOCOL;
}
pInfVersion = (SCEP_VERSION*)(((SCEP_HEADER*)m_pAssembleBuffer)->Rest);
pInfNegotiation = (SCEP_NEGOTIATION*)( sizeof(SCEP_VERSION)
+ (char*)pInfVersion );
pInfExtend = (SCEP_EXTEND*)( FIELD_OFFSET(SCEP_NEGOTIATION,InfVersion)
+ pInfNegotiation->Length
+ (char*)pInfNegotiation );
// Check to see if we have a complete connect PDU size-wise:
dwSize = 10 + pInfNegotiation->Length;
if (m_dwAssembleBufferSize == dwSize)
{
// Have a complete PDU.
dwStatus = NO_ERROR;
}
else if (m_dwAssembleBufferSize < dwSize)
{
// Need to wait for more data to arrive
dwStatus = ERROR_CONTINUE;
}
else
{
// Too much data...
dwStatus = ERROR_SCEP_INVALID_PROTOCOL;
}
if (dwStatus == NO_ERROR)
{
// Check to make sure the contents of the PDU "look" Ok:
if ( (pInfVersion->InfType != INF_TYPE_VERSION)
|| (pInfVersion->Version != PROTOCOL_VERSION) )
{
dwStatus = ERROR_SCEP_INVALID_PROTOCOL;
}
if ( (pInfNegotiation->InfType != INF_TYPE_NEGOTIATION)
|| (pInfNegotiation->InfVersion < INF_VERSION) )
{
dwStatus = ERROR_SCEP_INVALID_PROTOCOL;
}
if ( (pInfExtend->InfType != INF_TYPE_EXTEND)
|| (pInfExtend->Length != (sizeof(pInfExtend->Parameter1)
+sizeof(pInfExtend->Parameter2)))
|| (pInfExtend->Parameter1 != 0)
|| (pInfExtend->Parameter2 != 0) )
{
dwStatus = ERROR_SCEP_INVALID_PROTOCOL;
}
}
if (dwStatus == NO_ERROR)
{
*ppPdu = NewPdu();
if (!*ppPdu)
{
#ifdef DBG_ERROR
DbgPrint("CSCEP_CONNECTION::CheckConnectPdu(): Out of memory.\n");
#endif
dwStatus = ERROR_IRTRANP_OUT_OF_MEMORY;
}
else
{
*pdwPduSize = m_dwAssembleBufferSize;
memcpy(*ppPdu,m_pAssembleBuffer,m_dwAssembleBufferSize);
m_dwAssembleBufferSize = 0;
#ifdef DBG_ASSEMBLE
DbgPrint("Assemble: PDU: %d Reset: %d\n",
*pdwPduSize, m_dwAssembleBufferSize );
#endif
}
}
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::CheckConnectRespPdu() CLIENT
//
// A connect response from the IrTran-P server is either a ACK or
// NACK PDU. If we get here then it's an ACK. We'll make sure the
// entire PDU is here and that it is formatted correctly. There is
// a specific message type for ACK PDUs, the NACK is just a special
// case of MSG_TYPE_DATA and is handled elsewere (CheckDataPdu()).
//
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::CheckConnectRespPdu( OUT SCEP_HEADER **ppPdu,
OUT DWORD *pdwPduSize )
{
DWORD dwStatus;
DWORD dwSize;
SCEP_HEADER *pHeader;
SCEP_NEGOTIATION *pInfNegotiation;
ASSERT( ((SCEP_HEADER*)m_pAssembleBuffer)->MsgType
== MSG_TYPE_CONNECT_RESP);
if (m_dwAssembleBufferSize < MIN_PDU_SIZE_CONNECT_RESP)
{
return ERROR_CONTINUE;
}
if (m_dwAssembleBufferSize > MAX_PDU_SIZE_CONNECT_RESP)
{
return ERROR_SCEP_INVALID_PROTOCOL;
}
pHeader = (SCEP_HEADER*)m_pAssembleBuffer;
pInfNegotiation = (SCEP_NEGOTIATION*)(pHeader->Rest);
// Check to see if we have a complete connect PDU size-wise:
dwSize = sizeof(SCEP_HEADER)
+ FIELD_OFFSET(SCEP_NEGOTIATION,InfVersion)
+ pInfNegotiation->Length;
if (m_dwAssembleBufferSize == dwSize)
{
// Have a complete PDU.
dwStatus = NO_ERROR;
}
else if (m_dwAssembleBufferSize < dwSize)
{
// Need to wait for more data to arrive
dwStatus = ERROR_CONTINUE;
}
else
{
// Too much data...
dwStatus = ERROR_SCEP_INVALID_PROTOCOL;
}
if (dwStatus == NO_ERROR)
{
// Check to make sure the contents of the PDU "look" Ok:
if ( (pInfNegotiation->InfType != INF_TYPE_NEGOTIATION)
|| (pInfNegotiation->InfVersion < INF_VERSION) )
{
dwStatus = ERROR_SCEP_INVALID_PROTOCOL;
}
}
if (dwStatus == NO_ERROR)
{
*ppPdu = NewPdu();
if (!*ppPdu)
{
#ifdef DBG_ERROR
DbgPrint("CSCEP_CONNECTION::CheckConnectRespPdu(): Out of memory.\n");
#endif
dwStatus = ERROR_IRTRANP_OUT_OF_MEMORY;
}
else
{
*pdwPduSize = m_dwAssembleBufferSize;
memcpy(*ppPdu,m_pAssembleBuffer,m_dwAssembleBufferSize);
m_dwAssembleBufferSize = 0;
#ifdef DBG_ASSEMBLE
DbgPrint("Assemble: PDU: %d Reset: %d\n",
*pdwPduSize, m_dwAssembleBufferSize );
#endif
}
}
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::CheckDisconnectPdu()
//
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::CheckDisconnectPdu( OUT SCEP_HEADER **ppPdu,
OUT DWORD *pdwPduSize )
{
DWORD dwStatus = NO_ERROR;
DWORD dwSize;
SCEP_DISCONNECT *pDisconnect;
ASSERT( ((SCEP_HEADER*)m_pAssembleBuffer)->MsgType
== MSG_TYPE_DISCONNECT);
if (m_dwAssembleBufferSize < MIN_PDU_SIZE_DISCONNECT)
{
return ERROR_CONTINUE;
}
pDisconnect = (SCEP_DISCONNECT*)(((SCEP_HEADER*)m_pAssembleBuffer)->Rest);
// Check to make sure the contents of the PDU "look" Ok:
if (pDisconnect->InfType != INF_TYPE_REASON)
{
dwStatus = ERROR_SCEP_INVALID_PROTOCOL;
}
if (pDisconnect->Length1 != sizeof(USHORT))
{
dwStatus = ERROR_SCEP_INVALID_PROTOCOL;
}
if (dwStatus == NO_ERROR)
{
*ppPdu = NewPdu();
if (!*ppPdu)
{
#ifdef DBG_ERROR
DbgPrint("CSCEP_CONNECTION::CheckDisonnectPdu(): Out of memory.\n");
#endif
dwStatus = ERROR_IRTRANP_OUT_OF_MEMORY;
}
else
{
*pdwPduSize = sizeof(SCEP_HEADER) + 2 + pDisconnect->Length1;
memcpy(*ppPdu,m_pAssembleBuffer,*pdwPduSize);
m_dwAssembleBufferSize -= *pdwPduSize;
#ifdef DBG_ASSEMBLE
DbgPrint("Assemble: PDU: %d Reset: %d\n",
*pdwPduSize, m_dwAssembleBufferSize );
#endif
}
}
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::CheckDataPdu()
//
// The goal here is to check to see if we have a complete formatted
// PDU, if yes the return NO_ERROR, if the PDU looks ok so far, but
// isn't complete (we need to read more), then return ERROR_CONTINUE.
//
// Also if this is a little-endian machine, byteswap the header
// fields accordingly.
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::CheckDataPdu( OUT SCEP_HEADER **ppPdu,
OUT DWORD *pdwPduSize )
{
DWORD dwStatus;
DWORD dwExpectedPduSize;
UCHAR *pEnd;
SCEP_REQ_HEADER_SHORT *pReqHeaderShort;
SCEP_REQ_HEADER_LONG *pReqHeaderLong;
ASSERT( ((SCEP_HEADER*)m_pAssembleBuffer)->MsgType == MSG_TYPE_DATA);
if (m_dwAssembleBufferSize < MIN_PDU_SIZE_DATA)
{
return ERROR_CONTINUE;
}
// Get the length out of the PDU and see if we have a
// complete PDU:
pReqHeaderShort = (SCEP_REQ_HEADER_SHORT*)
(((SCEP_HEADER*)m_pAssembleBuffer)->Rest);
if (pReqHeaderShort->Length1 == USE_LENGTH2)
{
// We have a long PDU:
pReqHeaderLong = (SCEP_REQ_HEADER_LONG*)(pReqHeaderShort);
#ifdef LITTLE_ENDIAN
if (!m_fDidByteSwap)
{
ByteSwapReqHeaderLong(pReqHeaderLong);
m_fDidByteSwap = TRUE;
}
#endif
dwExpectedPduSize = sizeof(SCEP_HEADER)
+ FIELD_OFFSET(SCEP_REQ_HEADER_LONG,InfVersion)
+ pReqHeaderLong->Length2;
}
else
{
// We have a short PDU:
#ifdef LITTLE_ENDIAN
if (!m_fDidByteSwap)
{
ByteSwapReqHeaderShort(pReqHeaderShort);
m_fDidByteSwap = TRUE;
}
#endif
dwExpectedPduSize = sizeof(SCEP_HEADER)
+ FIELD_OFFSET(SCEP_REQ_HEADER_SHORT,InfVersion)
+ pReqHeaderShort->Length1;
}
// Ok, see if we have a complete PDU:
if (m_dwAssembleBufferSize == dwExpectedPduSize)
{
*ppPdu = NewPdu();
if (!*ppPdu)
{
#ifdef DBG_ERROR
DbgPrint("CSCEP_CONNECTION::CheckDataPdu(): Out of memory.\n");
#endif
dwStatus = ERROR_IRTRANP_OUT_OF_MEMORY;
}
else
{
*pdwPduSize = dwExpectedPduSize;
memcpy(*ppPdu,m_pAssembleBuffer,dwExpectedPduSize);
m_dwAssembleBufferSize = 0;
m_fDidByteSwap = FALSE;
#ifdef DBG_ASSEMBLE
DbgPrint("Assemble: PDU: %d Reset: %d\n",
*pdwPduSize, m_dwAssembleBufferSize );
#endif
dwStatus = NO_ERROR;
}
}
else if (m_dwAssembleBufferSize > dwExpectedPduSize)
{
*ppPdu = NewPdu();
if (!*ppPdu)
{
#ifdef DBG_ERROR
DbgPrint("CSCEP_CONNECTION::CheckDataPdu(): Out of memory.\n");
#endif
dwStatus = ERROR_IRTRANP_OUT_OF_MEMORY;
}
else
{
*pdwPduSize = dwExpectedPduSize;
memcpy(*ppPdu,m_pAssembleBuffer,dwExpectedPduSize);
pEnd = dwExpectedPduSize + (UCHAR*)m_pAssembleBuffer;
m_dwAssembleBufferSize -= dwExpectedPduSize;
m_fDidByteSwap = FALSE;
//
// move the data remaining to the front of the buffer
//
memmove(m_pAssembleBuffer,pEnd,m_dwAssembleBufferSize);
#ifdef DBG_ASSEMBLE
DbgPrint("Assemble: PDU: %d Reset: %d\n",
*pdwPduSize, m_dwAssembleBufferSize );
#endif
dwStatus = NO_ERROR;
}
}
else
{
dwStatus = ERROR_CONTINUE;
}
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::ParseConnectPdu()
//
// AssemblePDU() already did basic integrity checking of the PDU
// (via CheckConnectPdu()), so at this point we'll assume everything
// is Ok.
//
// NOTE: The Connect PDU is limited to 256 bytes in total length,
// so it will never be fragmented.
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::ParseConnectPdu( IN SCEP_HEADER *pPdu,
IN DWORD dwInputDataSize )
{
DWORD dwStatus;
DWORD dwLength;
if (dwInputDataSize > MAX_PDU_SIZE_CONNECT)
{
return ERROR_SCEP_INVALID_PROTOCOL;
}
SCEP_VERSION *pInfVersion;
SCEP_NEGOTIATION *pInfNegotiation;
SCEP_EXTEND *pInfExtend;
pInfVersion = (SCEP_VERSION*)pPdu->Rest;
pInfNegotiation = (SCEP_NEGOTIATION*)( sizeof(SCEP_VERSION)
+ (char*)pInfVersion );
pInfExtend = (SCEP_EXTEND*)( FIELD_OFFSET(SCEP_NEGOTIATION,InfVersion)
+ pInfNegotiation->Length
+ (char*)pInfNegotiation );
//
m_CFlag = pInfNegotiation->CFlag;
m_pSecondaryMachineId = (UCHAR*)AllocateMemory(MACHINE_ID_SIZE);
if (!m_pSecondaryMachineId)
{
return ERROR_IRTRANP_OUT_OF_MEMORY;
}
memcpy( m_pSecondaryMachineId,
pInfNegotiation->SecondaryMachineId,
MACHINE_ID_SIZE );
m_pPrimaryMachineId = (UCHAR*)AllocateMemory(MACHINE_ID_SIZE);
if (!m_pPrimaryMachineId)
{
FreeMemory(m_pSecondaryMachineId);
return ERROR_IRTRANP_OUT_OF_MEMORY;
}
memcpy( m_pPrimaryMachineId,
pInfNegotiation->PrimaryMachineId,
MACHINE_ID_SIZE );
// NOTE: The size of the negotiaion "text" is 18 bytes less than
// the length in the SCEP_NEGOTIATION record:
dwLength = pInfNegotiation->Length
- ( sizeof(pInfNegotiation->InfVersion)
+ sizeof(pInfNegotiation->CFlag)
+ sizeof(pInfNegotiation->SecondaryMachineId)
+ sizeof(pInfNegotiation->PrimaryMachineId));
dwStatus = ParseNegotiation( pInfNegotiation->Negotiation, dwLength );
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::ParseConnectRespPdu()
//
// AssemblePDU() already did basic integrity checking of the PDU
// (via CheckConnectRespPdu()), so at this point we'll assume
// everything is Ok.
//
// NOTE: The Connect Response PDU is limited to 255 bytes in total
// length, so it will never be fragmented.
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::ParseConnectRespPdu( IN SCEP_HEADER *pPdu,
IN DWORD dwPduSize )
{
DWORD dwStatus;
DWORD dwLength;
SCEP_NEGOTIATION *pInfNegotiation;
if (dwPduSize > MAX_PDU_SIZE_CONNECT)
{
return ERROR_SCEP_INVALID_PROTOCOL;
}
pInfNegotiation = (SCEP_NEGOTIATION*)( sizeof(SCEP_HEADER)
+ (char*)pPdu );
// This is the CFlag sent by the other machine.
m_CFlag = pInfNegotiation->CFlag;
m_pSecondaryMachineId = (UCHAR*)AllocateMemory(MACHINE_ID_SIZE);
if (!m_pSecondaryMachineId)
{
return ERROR_IRTRANP_OUT_OF_MEMORY;
}
memcpy( m_pSecondaryMachineId,
pInfNegotiation->SecondaryMachineId,
MACHINE_ID_SIZE );
m_pPrimaryMachineId = (UCHAR*)AllocateMemory(MACHINE_ID_SIZE);
if (!m_pPrimaryMachineId)
{
FreeMemory(m_pSecondaryMachineId);
return ERROR_IRTRANP_OUT_OF_MEMORY;
}
memcpy( m_pPrimaryMachineId,
pInfNegotiation->PrimaryMachineId,
MACHINE_ID_SIZE );
// NOTE: The size of the negotiaion "text" is 18 bytes less than
// the length in the SCEP_NEGOTIATION record:
dwLength = pInfNegotiation->Length
- ( sizeof(pInfNegotiation->InfVersion)
+ sizeof(pInfNegotiation->CFlag)
+ sizeof(pInfNegotiation->SecondaryMachineId)
+ sizeof(pInfNegotiation->PrimaryMachineId));
dwStatus = ParseNegotiation( pInfNegotiation->Negotiation, dwLength );
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::ParseNegotiation()
//
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::ParseNegotiation( IN UCHAR *pNegotiation,
IN DWORD dwNegotiationSize )
{
DWORD dwStatus = NO_ERROR;
UCHAR *pNext = pNegotiation;
DWORD dwSize = dwNegotiationSize;
if (dwNegotiationSize <= 1)
{
return NO_ERROR;
}
if (*(pNext++) < NEGOTIATION_VERSION)
{
return ERROR_SCEP_INVALID_PROTOCOL;
}
dwSize--;
while (pNext=ParseAttribute(pNext,
&dwSize,
&dwStatus))
{
if (dwStatus != NO_ERROR)
{
break;
}
}
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::ParseAttribute()
//
// Attributes are of the form:
//
// Attr <- AttrName Colon AttrValue CrLf
//
// AttrName <- Two byte attribute name.
//
// Colon <- ':'
//
// AttrValue <- Character string (bytes > 0x1f and < 0x8f).
//
// CrLf <- 0x0d 0x0a
//
//--------------------------------------------------------------------
UCHAR *CSCEP_CONNECTION::ParseAttribute( IN UCHAR *pAttributes,
IN DWORD *pdwAttributeSize,
OUT DWORD *pdwStatus )
{
int iAttribute;
int iPduSize;
ATTRIBUTE_TOKEN *pToken1 = 0;
ATTRIBUTE_TOKEN *pToken2 = 0;
ATTRIBUTE_TOKEN *pToken3 = 0;
ATTRIBUTE_TOKEN *pToken4 = 0;
*pdwStatus = NO_ERROR;
if ( (pToken1=NextToken(ATTRIBUTE_NAME,&pAttributes,pdwAttributeSize))
&& (IsAttributeName(pToken1,&iAttribute))
&& (pToken2=NextToken(ATTRIBUTE_COLON,&pAttributes,pdwAttributeSize))
&& (pToken3=NextToken(ATTRIBUTE_VALUE,&pAttributes,pdwAttributeSize))
&& (pToken4=NextToken(ATTRIBUTE_CRLF,&pAttributes,pdwAttributeSize)) )
{
if (iAttribute == ATTR_PDU_SIZE)
{
iPduSize = pToken3->pChars[0] - ONE;
if ((pToken3->dwSize == 1)&&(iPduSize >= 1)&&(iPduSize <= 4))
{
m_dwPduSendSize = g_adwPduSizes[iPduSize];
#ifdef DBG_IO
DbgPrint("ParseAttribute(): PduSendSize: %d\n",m_dwPduSendSize);
#endif
}
}
else
if (iAttribute == ATTR_PRODUCT_ID)
{
m_pszProductId = NewTokenString(pToken3,pdwStatus);
if (!m_pszProductId)
{
pAttributes = 0;
#ifdef DBG_IO
DbgPrint("ParseAttribute(): Product: %s\n",m_pszProductId);
#endif
}
}
else
if (iAttribute == ATTR_USER_NAME)
{
m_pszUserName = NewTokenString(pToken3,pdwStatus);
if (!m_pszUserName)
{
pAttributes = 0;
}
}
else
if (iAttribute == ATTR_PASSWORD)
{
m_pszPassword = NewTokenString(pToken3,pdwStatus);
if (!m_pszPassword)
{
pAttributes = 0;
}
}
}
else
{
if (*pdwAttributeSize > 0)
{
*pdwStatus = ERROR_SCEP_INVALID_PROTOCOL;
}
pAttributes = 0;
}
if (pToken1) FreeMemory(pToken1);
if (pToken2) FreeMemory(pToken2);
if (pToken3) FreeMemory(pToken3);
if (pToken4) FreeMemory(pToken4);
return pAttributes;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::ParseDataPdu()
//
// AssemblePDU() already did basic integrity checking of the PDU
// (via CheckConnectPdu()), so at this point we'll assume everything
// is Ok.
//
// NOTE: The Data PDU is limited to m_dwPduReceiveSize bytes in total
// length, if data is longer then you will get the fragmented versions
// of the Data PDU.
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::ParseDataPdu( IN SCEP_HEADER *pPdu,
IN DWORD dwPduSize,
OUT COMMAND_HEADER **ppCommand,
OUT UCHAR **ppUserData,
OUT DWORD *pdwUserDataSize )
{
DWORD dwStatus = NO_ERROR;
DWORD dwLengthOffset1;
DWORD dwLengthOffset3;
// There are four cases of Data PDUs, single (unfragmented)
// "short" and "long" PDUs, and fragmented "short" and
// "long" PDUs:
SCEP_REQ_HEADER_SHORT *pReqHeaderShort;
SCEP_REQ_HEADER_LONG *pReqHeaderLong;
SCEP_REQ_HEADER_SHORT_FRAG *pReqHeaderShortFrag;
SCEP_REQ_HEADER_LONG_FRAG *pReqHeaderLongFrag;
*ppCommand = 0;
// Make sure the packet length makes sense...
if (dwPduSize > m_dwPduReceiveSize)
{
return ERROR_SCEP_INVALID_PROTOCOL;
}
pReqHeaderShort = (SCEP_REQ_HEADER_SHORT*)(pPdu->Rest);
if (pReqHeaderShort->InfType != INF_TYPE_USER_DATA)
{
return ERROR_SCEP_INVALID_PROTOCOL;
}
//
// See if we have a short or long PDU:
//
if (pReqHeaderShort->Length1 != USE_LENGTH2)
{
// This is a short PDU (use Length1).
m_DFlag = pReqHeaderShort->DFlag;
if ( (pReqHeaderShort->DFlag == DFLAG_SINGLE_PDU)
|| (pReqHeaderShort->DFlag == DFLAG_CONNECT_REJECT))
{
//
// This is a short unfragmented PDU.
//
// Make sure that a command header is present:
if (pReqHeaderShort->Length1 > 4)
{
*ppCommand = (COMMAND_HEADER*)(pReqHeaderShort->CommandHeader);
m_SrcPid = (*ppCommand)->SrcPid;
m_DestPid = (*ppCommand)->DestPid;
m_dwCommandId = (*ppCommand)->CommandId;
}
else
{
*ppCommand = 0;
}
*ppUserData = COMMAND_HEADER_SIZE + pReqHeaderShort->CommandHeader;
*pdwUserDataSize = pReqHeaderShort->Length3 - COMMAND_HEADER_SIZE;
m_Fragmented = FALSE;
m_dwSequenceNo = 0;
m_dwRestNo = 0;
// In this case, there are two different lengths
// in the PDU that must add up to dwPduSize...
//
// Note: Not currently testing Length1 for consistency...
//
dwLengthOffset3 = sizeof(SCEP_HEADER)
+ FIELD_OFFSET(SCEP_REQ_HEADER_SHORT,CommandHeader);
if (dwPduSize != dwLengthOffset3+pReqHeaderShort->Length3)
{
dwStatus = ERROR_SCEP_INVALID_PROTOCOL;
}
}
else if (pReqHeaderShort->DFlag == DFLAG_FIRST_FRAGMENT)
{
//
// This is a short fragmented PDU, and is the first
// fragment, so it will contain a COMMAND_HEADER.
//
// In practice, this should probably never show up...
pReqHeaderShortFrag = (SCEP_REQ_HEADER_SHORT_FRAG*)pReqHeaderShort;
// The command header is present only on the first fragment
// of a multi-fragment PDU:
if (pReqHeaderShortFrag->SequenceNo == 0)
{
*ppCommand
= (COMMAND_HEADER*)(pReqHeaderShortFrag->CommandHeader);
m_SrcPid = (*ppCommand)->SrcPid;
m_DestPid = (*ppCommand)->DestPid;
m_dwCommandId = (*ppCommand)->CommandId;
}
else
{
*ppCommand = 0;
}
*ppUserData
= COMMAND_HEADER_SIZE + pReqHeaderShortFrag->CommandHeader;
*pdwUserDataSize
= pReqHeaderShortFrag->Length3 - COMMAND_HEADER_SIZE;
m_Fragmented = TRUE;
m_dwSequenceNo = pReqHeaderShortFrag->SequenceNo;
m_dwRestNo = pReqHeaderShortFrag->RestNo;
// Check the two length fields for consistency:
dwLengthOffset1 = sizeof(SCEP_HEADER)
+ FIELD_OFFSET(SCEP_REQ_HEADER_SHORT_FRAG,InfVersion);
dwLengthOffset3 = sizeof(SCEP_HEADER)
+ FIELD_OFFSET(SCEP_REQ_HEADER_SHORT_FRAG,SequenceNo);
if ( (dwPduSize != dwLengthOffset1+pReqHeaderShortFrag->Length1)
|| (dwPduSize != dwLengthOffset3+pReqHeaderShortFrag->Length3) )
{
dwStatus = ERROR_SCEP_INVALID_PROTOCOL;
}
}
else if ( (pReqHeaderShort->DFlag == DFLAG_FRAGMENT)
|| (pReqHeaderShort->DFlag == DFLAG_LAST_FRAGMENT))
{
//
// This is a short fragmented PDU.
//
// The 2nd through last fragmented PDUs don't contain a
// COMMAND_HEADER, just data after Length3.
pReqHeaderShortFrag = (SCEP_REQ_HEADER_SHORT_FRAG*)pReqHeaderShort;
// The command header is present only on the first fragment
// of a multi-fragment PDU:
if (pReqHeaderShortFrag->SequenceNo == 0)
{
*ppCommand
= (COMMAND_HEADER*)(pReqHeaderShortFrag->CommandHeader);
m_SrcPid = (*ppCommand)->SrcPid;
m_DestPid = (*ppCommand)->DestPid;
m_dwCommandId = (*ppCommand)->CommandId;
}
else
{
*ppCommand = 0;
}
*ppUserData = pReqHeaderShortFrag->CommandHeader;
*pdwUserDataSize = pReqHeaderShortFrag->Length3;
m_Fragmented = TRUE;
m_dwSequenceNo = pReqHeaderShortFrag->SequenceNo;
m_dwRestNo = pReqHeaderShortFrag->RestNo;
// Check the two length fields for consistency:
dwLengthOffset1 = sizeof(SCEP_HEADER)
+ FIELD_OFFSET(SCEP_REQ_HEADER_SHORT_FRAG,InfVersion);
dwLengthOffset3 = sizeof(SCEP_HEADER)
+ FIELD_OFFSET(SCEP_REQ_HEADER_SHORT_FRAG,SequenceNo);
if ( (dwPduSize != dwLengthOffset1+pReqHeaderShortFrag->Length1)
|| (dwPduSize != dwLengthOffset3+pReqHeaderShortFrag->Length3) )
{
dwStatus = ERROR_SCEP_INVALID_PROTOCOL;
}
}
else
{
// Undefined DFlag, we've got a problem...
dwStatus = ERROR_SCEP_INVALID_PROTOCOL;
}
}
else
{
// We have a long PDU.
pReqHeaderLong = (SCEP_REQ_HEADER_LONG*)pReqHeaderShort;
m_DFlag = pReqHeaderLong->DFlag;
if ( (pReqHeaderLong->DFlag == DFLAG_SINGLE_PDU)
|| (pReqHeaderLong->DFlag == DFLAG_CONNECT_REJECT))
{
//
// This is a long unfragmented PDU.
//
*ppCommand = (COMMAND_HEADER*)(pReqHeaderLong->CommandHeader);
*ppUserData = COMMAND_HEADER_SIZE + pReqHeaderLong->CommandHeader;
*pdwUserDataSize = pReqHeaderLong->Length3 - COMMAND_HEADER_SIZE;
m_Fragmented = FALSE;
m_dwSequenceNo = 0;
m_dwRestNo = 0;
m_SrcPid = (*ppCommand)->SrcPid;
m_DestPid = (*ppCommand)->DestPid;
m_dwCommandId = (*ppCommand)->CommandId;
// In this case, there are two different lengths
// in the PDU that must add up to dwPduSize...
if ( (dwPduSize != 6UL+pReqHeaderLong->Length2)
|| (dwPduSize != 10UL+pReqHeaderLong->Length3))
{
dwStatus = ERROR_SCEP_INVALID_PROTOCOL;
}
}
else if (pReqHeaderLong->DFlag == DFLAG_FIRST_FRAGMENT)
{
//
// This is the first fragment of a long fragmented PDU.
//
pReqHeaderLongFrag = (SCEP_REQ_HEADER_LONG_FRAG*)pReqHeaderLong;
m_pCommandHeader = (COMMAND_HEADER*)AllocateMemory(sizeof(COMMAND_HEADER));
if (!m_pCommandHeader)
{
dwStatus = ERROR_IRTRANP_OUT_OF_MEMORY;
}
else
{
memcpy(m_pCommandHeader,
pReqHeaderLongFrag->CommandHeader,
COMMAND_HEADER_SIZE );
*ppCommand = m_pCommandHeader;
}
*ppUserData = COMMAND_HEADER_SIZE + pReqHeaderLongFrag->CommandHeader;
*pdwUserDataSize = pReqHeaderLongFrag->Length3 - COMMAND_HEADER_SIZE;
m_Fragmented = TRUE;
m_dwSequenceNo = pReqHeaderLongFrag->SequenceNo;
m_dwRestNo = pReqHeaderLongFrag->RestNo;
if (*ppCommand)
{
m_dwCommandId = (*ppCommand)->CommandId;
}
else
{
m_dwCommandId = 0;
}
// Check the two length fields for consistency:
if ( (dwPduSize != (DWORD)6+pReqHeaderLongFrag->Length2)
|| (dwPduSize != (DWORD)18+pReqHeaderLongFrag->Length3) )
{
dwStatus = ERROR_SCEP_INVALID_PROTOCOL;
}
}
else if ( (pReqHeaderLong->DFlag == DFLAG_FRAGMENT)
|| (pReqHeaderLong->DFlag == DFLAG_LAST_FRAGMENT) )
{
//
// This is the second through last fragment of a long
// fragmented PDU.
//
// In this case the PDU doesn't contain a command
// header, just more user data...
//
pReqHeaderLongFrag = (SCEP_REQ_HEADER_LONG_FRAG*)pReqHeaderLong;
*ppCommand = m_pCommandHeader;
*ppUserData = (UCHAR*)(pReqHeaderLongFrag->CommandHeader);
*pdwUserDataSize = pReqHeaderLongFrag->Length3;
m_Fragmented = TRUE;
m_dwSequenceNo = pReqHeaderLongFrag->SequenceNo;
m_dwRestNo = pReqHeaderLongFrag->RestNo;
m_dwCommandId = (*ppCommand)->CommandId;
// Check the two length fields for consistency:
if ( (dwPduSize != (DWORD)6+pReqHeaderLongFrag->Length2)
|| (dwPduSize != (DWORD)18+pReqHeaderLongFrag->Length3) )
{
dwStatus = ERROR_SCEP_INVALID_PROTOCOL;
}
}
else
{
// Undefined DFlag, we've got a problem...
dwStatus = ERROR_SCEP_INVALID_PROTOCOL;
}
}
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::ParseDisconnectPdu()
//
// NOTE: In practice, reason codes should always be 2 bytes for
// SCEP version 1.0.
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::ParseDisconnectPdu( IN SCEP_HEADER *pPdu,
IN DWORD dwPduSize )
{
DWORD dwStatus;
SCEP_DISCONNECT *pDisconnect = (SCEP_DISCONNECT*)(pPdu->Rest);
if ( (pDisconnect->InfType != INF_TYPE_REASON)
|| (pDisconnect->Length1 != sizeof(USHORT))
|| (pDisconnect->ReasonCode == 0) )
{
dwStatus = ERROR_SCEP_UNSPECIFIED_DISCONNECT;
}
else if (pDisconnect->ReasonCode == 1)
{
dwStatus = ERROR_SCEP_USER_DISCONNECT;
}
else if (pDisconnect->ReasonCode == 2)
{
dwStatus = ERROR_SCEP_PROVIDER_DISCONNECT;
}
else
{
dwStatus = ERROR_SCEP_UNSPECIFIED_DISCONNECT;
}
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::ParsePdu()
//
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::ParsePdu( IN SCEP_HEADER *pPdu,
IN DWORD dwPduSize,
OUT COMMAND_HEADER **ppCommandHeader,
OUT UCHAR **ppUserData,
OUT DWORD *pdwUserDataSize )
{
DWORD dwStatus = NO_ERROR;
*ppCommandHeader = 0;
*ppUserData = 0;
*pdwUserDataSize = 0;
switch (pPdu->MsgType)
{
case MSG_TYPE_CONNECT_REQ:
dwStatus = ParseConnectPdu( pPdu, dwPduSize );
break;
case MSG_TYPE_CONNECT_RESP:
dwStatus = ParseConnectRespPdu( pPdu, dwPduSize );
break;
case MSG_TYPE_DATA:
dwStatus = ParseDataPdu( pPdu,
dwPduSize,
ppCommandHeader,
ppUserData,
pdwUserDataSize );
break;
case MSG_TYPE_DISCONNECT:
dwStatus = ParseDisconnectPdu( pPdu, dwPduSize );
break;
}
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::BuildConnectPdu()
//
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::BuildConnectPdu( OUT SCEP_HEADER **ppPdu,
OUT DWORD *pdwPduSize )
{
DWORD dwStatus = NO_ERROR;
DWORD dwPduSize;
SCEP_HEADER *pHeader;
SCEP_VERSION *pVersion;
SCEP_NEGOTIATION *pNegotiation;
SCEP_EXTEND *pExtend;
*ppPdu = 0;
*pdwPduSize = 0;
// Note that the PDU size doesn't include a trailing zero, as you
// would think by lookin at "sizeof(CONNECT_PDU_ATTRIBUTES)" below.
// The extra byte is for the first byte of the Negotiation string
// (which is the Negotiation version), so the eqn below is +1-1...
dwPduSize = sizeof(SCEP_HEADER)
+ sizeof(SCEP_VERSION)
+ sizeof(SCEP_NEGOTIATION)
+ sizeof(CONNECT_PDU_ATTRIBUTES)
+ sizeof(SCEP_EXTEND);
pHeader = NewPdu(); // Defaulting dwPduSize to MAX_PDU_SIZE
if (!pHeader)
{
return ERROR_IRTRANP_OUT_OF_MEMORY;
}
memset(pHeader,0,MAX_PDU_SIZE); // MAX_PDU_SIZE since dwPduSize is defauled above.
pHeader->Null = 0;
pHeader->MsgType = MSG_TYPE_CONNECT_REQ;
pVersion = (SCEP_VERSION*)(pHeader->Rest);
pVersion->InfType = INF_TYPE_VERSION;
pVersion->Version = PROTOCOL_VERSION;
pNegotiation = (SCEP_NEGOTIATION*)((char*)pVersion + sizeof(SCEP_VERSION));
pNegotiation->InfType = INF_TYPE_NEGOTIATION;
pNegotiation->Length = 18 + sizeof(CONNECT_PDU_ATTRIBUTES);
pNegotiation->InfVersion = INF_VERSION;
pNegotiation->CFlag = CFLAG_ISSUE_OR_EXECUTE;
// pNegotiation->SecondaryMachineId -- Leave set to zeros...
// pNegotiation->PrimaryMachineId -- Leave set to zeros...
pNegotiation->Negotiation[0] = NEGOTIATION_VERSION;
memcpy( &(pNegotiation->Negotiation[1]),
CONNECT_PDU_ATTRIBUTES,
sizeof(CONNECT_PDU_ATTRIBUTES)-1 ); // No Trailing zero...
pExtend = (SCEP_EXTEND*)( (char*)pHeader + dwPduSize - sizeof(SCEP_EXTEND));
pExtend->InfType = INF_TYPE_EXTEND;
pExtend->Length = 2;
pExtend->Parameter1 = 0;
pExtend->Parameter2 = 0;
*ppPdu = pHeader;
*pdwPduSize = dwPduSize;
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::BuildConnectRespPdu()
//
// This is the response PDU for a connection request from a camera.
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::BuildConnectRespPdu( OUT SCEP_HEADER **ppPdu,
OUT DWORD *pdwPduSize )
{
DWORD dwStatus = NO_ERROR;
DWORD dwPduSize;
SCEP_HEADER *pHeader;
SCEP_NEGOTIATION *pNegotiation;
*ppPdu = 0;
*pdwPduSize = 0;
// Note that the PDU size doesn't include a trailing zero, as you
// would think by lookin at "sizeof(RESPONSE_PDU_ATTRIBUTES)" below,
// the extra byte in for the first byte of the Negotiation string
// which is the Negotiation version, so the eqn below is +1-1...
dwPduSize = sizeof(SCEP_HEADER)
+ sizeof(SCEP_NEGOTIATION)
+ sizeof(RESPONSE_PDU_ATTRIBUTES);
pHeader = NewPdu();
if (!pHeader)
{
return ERROR_IRTRANP_OUT_OF_MEMORY;
}
memset(pHeader,0,MAX_PDU_SIZE); // MAX_PDU_SIZE is default arg in NewPdu().
pHeader->Null = 0;
pHeader->MsgType = MSG_TYPE_CONNECT_RESP;
pNegotiation = (SCEP_NEGOTIATION*)(pHeader->Rest);
pNegotiation->InfType = INF_TYPE_NEGOTIATION;
pNegotiation->Length = 18 + sizeof(RESPONSE_PDU_ATTRIBUTES);
pNegotiation->InfVersion = INF_VERSION;
pNegotiation->CFlag = CFLAG_ISSUE_OR_EXECUTE;
memcpy( pNegotiation->SecondaryMachineId,
m_pPrimaryMachineId,
MACHINE_ID_SIZE );
memcpy( pNegotiation->PrimaryMachineId,
m_pSecondaryMachineId,
MACHINE_ID_SIZE );
pNegotiation->Negotiation[0] = NEGOTIATION_VERSION;
memcpy( &(pNegotiation->Negotiation[1]),
RESPONSE_PDU_ATTRIBUTES,
sizeof(RESPONSE_PDU_ATTRIBUTES)-1 ); // No Trailing zero...
*ppPdu = pHeader;
*pdwPduSize = dwPduSize;
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::BuildConnectNackPdu()
//
// This is the response PDU for a connection request from a camera
// when we want to reject the connection request.
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::BuildConnectNackPdu( OUT SCEP_HEADER **ppPdu,
OUT DWORD *pdwPduSize )
{
DWORD dwStatus = NO_ERROR;
DWORD dwPduSize;
SCEP_HEADER *pHeader;
SCEP_REQ_HEADER_SHORT *pReqHeader;
*ppPdu = 0;
*pdwPduSize = 0;
// A short PDU, there is now command header, so Length3 is zero...
dwPduSize = sizeof(SCEP_HEADER)
+ sizeof(SCEP_REQ_HEADER_SHORT)
- sizeof(COMMAND_HEADER);
pHeader = NewPdu();
if (!pHeader)
{
return ERROR_IRTRANP_OUT_OF_MEMORY;
}
memset(pHeader,0,MAX_PDU_SIZE);
pHeader->Null = 0;
pHeader->MsgType = MSG_TYPE_CONNECT_REQ;
pReqHeader = (SCEP_REQ_HEADER_SHORT*)(pHeader->Rest);
pReqHeader->InfType = INF_TYPE_USER_DATA;
pReqHeader->Length1 = sizeof(pReqHeader->InfVersion)
+ sizeof(pReqHeader->DFlag)
+ sizeof(pReqHeader->Length3);
pReqHeader->InfVersion = INF_VERSION;
pReqHeader->DFlag = DFLAG_CONNECT_REJECT;
pReqHeader->Length3 = 0;
*ppPdu = pHeader;
*pdwPduSize = dwPduSize;
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::BuildAbortPdu()
//
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::BuildAbortPdu( OUT SCEP_HEADER **ppPdu,
OUT DWORD *pdwPduSize )
{
DWORD dwStatus = NO_ERROR;
DWORD dwPduSize;
SCEP_HEADER *pHeader;
COMMAND_HEADER *pCommandHeader;
SCEP_REQ_HEADER_SHORT *pReqHeader;
*ppPdu = 0;
*pdwPduSize = 0;
dwPduSize = sizeof(SCEP_HEADER) + sizeof(SCEP_REQ_HEADER_SHORT);
pHeader = NewPdu();
if (!pHeader)
{
return ERROR_IRTRANP_OUT_OF_MEMORY;
}
memset(pHeader,0,MAX_PDU_SIZE); // MAX_PDU_SIZE is default arg for NewPdu().
pHeader->Null = 0;
pHeader->MsgType = MSG_TYPE_DATA;
pReqHeader = (SCEP_REQ_HEADER_SHORT*)(pHeader->Rest);
pReqHeader->InfType = INF_TYPE_USER_DATA;
pReqHeader->Length1 = 4 + sizeof(COMMAND_HEADER);
pReqHeader->InfVersion = INF_VERSION;
pReqHeader->DFlag = DFLAG_SINGLE_PDU;
pReqHeader->Length3 = sizeof(COMMAND_HEADER);
#ifdef LITTLE_ENDIAN
pReqHeader->Length3 = ByteSwapShort(pReqHeader->Length3);
#endif
pCommandHeader = (COMMAND_HEADER*)(pReqHeader->CommandHeader);
pCommandHeader->Marker58h = 0x58;
pCommandHeader->PduType = PDU_TYPE_ABORT;
pCommandHeader->Length4 = 22;
pCommandHeader->DestPid = m_SrcPid;
pCommandHeader->SrcPid = m_DestPid;
pCommandHeader->CommandId = (USHORT)m_dwCommandId;
#ifdef LITTLE_ENDIAN
ByteSwapCommandHeader(pCommandHeader);
#endif
*ppPdu = pHeader;
*pdwPduSize = dwPduSize;
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::BuildStopPdu()
//
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::BuildStopPdu( OUT SCEP_HEADER **ppPdu,
OUT DWORD *pdwPduSize )
{
DWORD dwStatus = NO_ERROR;
DWORD dwPduSize;
SCEP_HEADER *pHeader;
SCEP_REQ_HEADER_SHORT *pReqHeader;
*ppPdu = 0;
*pdwPduSize = 0;
dwPduSize = sizeof(SCEP_HEADER)
+ sizeof(SCEP_REQ_HEADER_SHORT)
- sizeof(COMMAND_HEADER);
pHeader = NewPdu();
if (!pHeader)
{
return ERROR_IRTRANP_OUT_OF_MEMORY;
}
memset(pHeader,0,MAX_PDU_SIZE); // MAX_PDU_SIZE is default arg for NewPdu() above.
pHeader->Null = 0;
pHeader->MsgType = MSG_TYPE_DATA;
pReqHeader = (SCEP_REQ_HEADER_SHORT*)(pHeader->Rest);
pReqHeader->InfType = INF_TYPE_USER_DATA;
pReqHeader->Length1 = 4;
pReqHeader->InfVersion = INF_VERSION;
pReqHeader->DFlag = DFLAG_INTERRUPT;
pReqHeader->Length3 = 0;
*ppPdu = pHeader;
*pdwPduSize = dwPduSize;
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::BuildDisconnectPdu()
//
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::BuildDisconnectPdu( IN USHORT ReasonCode,
OUT SCEP_HEADER **ppPdu,
OUT DWORD *pdwPduSize )
{
DWORD dwStatus = NO_ERROR;
DWORD dwPduSize;
SCEP_HEADER *pHeader;
SCEP_DISCONNECT *pDisconnect;
*ppPdu = 0;
*pdwPduSize = 0;
dwPduSize = sizeof(SCEP_HEADER)
+ sizeof(SCEP_DISCONNECT);
pHeader = NewPdu();
if (!pHeader)
{
return ERROR_IRTRANP_OUT_OF_MEMORY;
}
memset(pHeader,0,MAX_PDU_SIZE); // MAX_PDU_SIZE is default arg for NewPdu() above.
pHeader->Null = 0;
pHeader->MsgType = MSG_TYPE_DISCONNECT;
pDisconnect = (SCEP_DISCONNECT*)(pHeader->Rest);
pDisconnect->InfType = INF_TYPE_REASON;
pDisconnect->Length1 = sizeof(pDisconnect->ReasonCode);
pDisconnect->ReasonCode = ReasonCode;
#ifdef LITTLE_ENDIAN
pDisconnect->ReasonCode = ByteSwapShort(pDisconnect->ReasonCode);
#endif
*ppPdu = pHeader;
*pdwPduSize = dwPduSize;
return dwStatus;
}
//--------------------------------------------------------------------
// CSCEP_CONNECTION::SetScepLength()
//
// Update the length fields in a PDU to reflect the total length
// of a PDU.
//
// WARNING: Currently only supports long fragmented PDUs.
//--------------------------------------------------------------------
DWORD CSCEP_CONNECTION::SetScepLength( IN SCEP_HEADER *pPdu,
IN DWORD dwTotalPduSize )
{
DWORD dwStatus = NO_ERROR;
SCEP_REQ_HEADER_LONG_FRAG *pScepHeader;
if (dwTotalPduSize > MAX_PDU_SIZE)
{
dwStatus = ERROR_SCEP_PDU_TOO_LARGE;
}
else
{
pScepHeader = (SCEP_REQ_HEADER_LONG_FRAG *)(pPdu->Rest);
pScepHeader->Length1 = USE_LENGTH2;
pScepHeader->Length2 = (USHORT)dwTotalPduSize - 6;
pScepHeader->Length3 = (USHORT)dwTotalPduSize - 18;
#ifdef LITTLE_ENDIAN
pScepHeader->Length2 = ByteSwapShort(pScepHeader->Length2);
pScepHeader->Length3 = ByteSwapShort(pScepHeader->Length3);
#endif
}
return dwStatus;
}