You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
192 lines
4.9 KiB
192 lines
4.9 KiB
/*
|
|
* pktcoder.h
|
|
*
|
|
* Copyright (c) 1993 - 1995 by DataBeam Corporation, Lexington, KY
|
|
*
|
|
* Abstract:
|
|
* This is the interface file for the PacketCoder class. This
|
|
* is an abstract base class which cannot be directly instantiated, but
|
|
* rather, exists to be inherited from. It defines a set of virtual
|
|
* member functions which will be shared by all classes that inherit from
|
|
* this one. This class defines the behaviors necessary to encode,
|
|
* decode, and manipulate Protocol Data Unit (PDU) structures.
|
|
*
|
|
* Caveats:
|
|
* None.
|
|
*
|
|
* Author:
|
|
* John B. O'Nan
|
|
*/
|
|
#ifndef _PACKETCODER_
|
|
#define _PACKETCODER_
|
|
|
|
/*
|
|
* Macros.
|
|
*/
|
|
#define BASIC_ENCODING_RULES 0
|
|
#define PACKED_ENCODING_RULES 1
|
|
|
|
/*
|
|
* This enumeration defines the various errors that can be returned during
|
|
* the use of a PacketCoder object.
|
|
*/
|
|
typedef enum
|
|
{
|
|
PACKET_CODER_NO_ERROR,
|
|
PACKET_CODER_BAD_REVERSE_ATTEMPT,
|
|
PACKET_CODER_INCOMPATIBLE_PROTOCOL
|
|
} PacketCoderError;
|
|
typedef PacketCoderError * PPacketCoderError;
|
|
|
|
|
|
/*
|
|
* This is the class definition for class PacketCoder
|
|
*/
|
|
class PacketCoder
|
|
{
|
|
public:
|
|
virtual ~PacketCoder ();
|
|
virtual BOOL Encode (LPVOID pdu_structure,
|
|
int pdu_type,
|
|
UINT rules_type,
|
|
LPBYTE *encoding_buffer,
|
|
UINT *encoding_buffer_length) = 0;
|
|
|
|
virtual BOOL Decode (LPBYTE encoded_buffer,
|
|
UINT encoded_buffer_length,
|
|
int pdu_type,
|
|
UINT rules_type,
|
|
LPVOID *pdecoding_buffer,
|
|
UINT *pdecoding_buffer_length) = 0;
|
|
|
|
virtual DBBoolean IsMCSDataPacket ( LPBYTE encoded_buffer,
|
|
UINT rules_type) = 0;
|
|
virtual void FreeEncoded (LPBYTE encoded_buffer) = 0;
|
|
|
|
virtual void FreeDecoded (int pdu_type, LPVOID decoded_buffer) = 0;
|
|
|
|
};
|
|
typedef PacketCoder * PPacketCoder;
|
|
|
|
/*
|
|
* ~PacketCoder ()
|
|
*
|
|
* Functional Description:
|
|
* This is a virtual destructor. It does not actually do anything in this
|
|
* class.
|
|
*
|
|
* Formal Parameters:
|
|
* None.
|
|
*
|
|
* Return Value:
|
|
* None.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
* Caveats:
|
|
* None.
|
|
*/
|
|
/*
|
|
* void Encode ( LPVOID pdu_structure,
|
|
* int pdu_type,
|
|
* LPBYTE *encoding_buffer,
|
|
* UINT *encoding_buffer_length)
|
|
*
|
|
* Functional Description:
|
|
* This function encodes Protocol data units (PDU's) into ASN.1 compliant
|
|
* byte streams.
|
|
* The coder allocates the buffer space for the encoded data.
|
|
*
|
|
* Formal Parameters:
|
|
* pdu_structure (i) Pointer to structure holding PDU data.
|
|
* pdu_type (i) Define indicating type of PDU.
|
|
* encoding_buffer (o) Pointer to buffer to hold encoded data.
|
|
* encoding_buffer_length (o) Pointer to length of buffer for encoded data.
|
|
*
|
|
* Return Value:
|
|
* None.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
* Caveats:
|
|
* None.
|
|
*/
|
|
/*
|
|
* void Decode ( LPBYTE encoded_buffer,
|
|
* UINT encoded_buffer_length,
|
|
* int pdu_type,
|
|
* LPVOID decoding_buffer,
|
|
* UINT decoding_buffer_length,
|
|
* UINT *pulDataOffset)
|
|
*
|
|
* Functional Description:
|
|
* This function decodes ASN.1 compliant byte streams into the
|
|
* appropriate PDU structures.
|
|
*
|
|
* Formal Parameters:
|
|
* encoded_buffer (i) Pointer to buffer holding data to decode.
|
|
* encoded_buffer_length (i) Length of buffer holding data to decode.
|
|
* pdu_type (o) Returns type of PDU.
|
|
* decoding_buffer (o) Pointer to buffer to hold the decoded data.
|
|
* decoding_buffer_length (i) Length of buffer to hold the decoded data.
|
|
* pulDataOffset (o) Pointer to a value that stores the offset of the data in an encoded MCS data packet.
|
|
*
|
|
* Return Value:
|
|
* None.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
* Caveats:
|
|
* None.
|
|
*/
|
|
/*
|
|
* void CopyDecodedData ( LPVOID pdu_source_structure,
|
|
* LPVOID pdu_destination_structure,
|
|
* int pdu_type)
|
|
*
|
|
* Functional Description:
|
|
* This function makes a copy of the non-encoded PDU structure. It returns
|
|
* the length of the structure it has created. Normally, this will just
|
|
* be the length of the source structure but the length is returned for
|
|
* added flexibility later.
|
|
*
|
|
* Formal Parameters:
|
|
* pdu_source_structure(i) Pointer to structure holding PDU data.
|
|
* pdu_destination_structure(o) Pointer to structure to hold copy of
|
|
* PDU data.
|
|
* pdu_type (i) The type of PDU to copy.
|
|
*
|
|
* Return Value:
|
|
* Size of the destination PDU structure.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
* Caveats:
|
|
* None.
|
|
*/
|
|
/*
|
|
* DBBoolean IsMCSDataPacket ()
|
|
*
|
|
* Functional Description:
|
|
* This function determines whether the encoded packet is an MCS Data packet
|
|
* or not.
|
|
*
|
|
* Formal Parameters:
|
|
* encoded_buffer (i) Pointer to buffer holding the encoded PDU.
|
|
* rules_type (i) The used encoding rules.
|
|
*
|
|
* Return value:
|
|
* TRUE, if the packet is an MCS Data packet. FALSE, otherwise.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
* Caveats:
|
|
* None.
|
|
*/
|
|
|
|
#endif
|