pcpp::S7CommLayer Class Reference

#include <S7CommLayer.h>

Inheritance diagram for pcpp::S7CommLayer:

Public Member Functions
	S7CommLayer (uint8_t msgType, uint16_t pduRef, uint16_t paramLength, uint16_t dataLength, uint8_t errorClass=0, uint8_t errorCode=0)
	S7CommLayer (uint8_t *data, size_t dataLen, Layer *prevLayer, Packet *packet)
uint8_t	getProtocolId () const
uint8_t	getMsgType () const
uint16_t	getPduRef () const
uint16_t	getParamLength () const
uint16_t	getDataLength () const
uint8_t	getErrorCode () const
uint8_t	getErrorClass () const
const S7CommParameter *	getParameter ()
void	setMsgType (uint8_t msgType) const
void	setPduRef (uint16_t pduRef) const
void	setErrorCode (uint8_t errorCode) const
void	setErrorClass (uint8_t errorClass) const
size_t	getHeaderLen () const override
void	computeCalculateFields () override
	Does nothing for this layer (S7CommLayer is always last)
void	parseNextLayer () override
	Does nothing for this layer (S7CommLayer is always last)
std::string	toString () const override
OsiModelLayer	getOsiModelLayer () const override
Public Member Functions inherited from pcpp::Layer
	~Layer () override
Layer *	getNextLayer () const
Layer *	getPrevLayer () const
ProtocolType	getProtocol () const
bool	isMemberOfProtocolFamily (ProtocolTypeFamily protocolTypeFamily) const
uint8_t *	getData () const
size_t	getDataLen () const
uint8_t *	getLayerPayload () const
size_t	getLayerPayloadSize () const
bool	isAllocatedToPacket () const
void	copyData (uint8_t *toArr) const
uint8_t *	getDataPtr (size_t offset=0) const override

Static Public Member Functions
static bool	isDataValid (const uint8_t *data, size_t dataSize)

Additional Inherited Members
Protected Member Functions inherited from pcpp::Layer
template<typename T , typename... Args>
Layer *	constructNextLayer (uint8_t *data, size_t dataLen, Packet *packet, Args &&... extraArgs)
template<typename T , typename TFallback , typename... Args>
Layer *	tryConstructNextLayerWithFallback (uint8_t *data, size_t dataLen, Packet *packet, Args &&... extraArgs)
Static Protected Member Functions inherited from pcpp::Layer
template<typename T >
static bool	canReinterpretAs (const uint8_t *data, size_t dataLen)
	Check if the data is large enough to reinterpret as a type. More...

Detailed Description

Represents a S7COMM (S7 Communication) protocol

Constructor & Destructor Documentation

S7CommLayer() [1/2]

pcpp::S7CommLayer::S7CommLayer	(	uint8_t	msgType,
		uint16_t	pduRef,
		uint16_t	paramLength,
		uint16_t	dataLength,
		uint8_t	errorClass = 0,
		uint8_t	errorCode = 0
	)

A constructor that allocates a new S7comm header

Parameters

[in]	msgType	The general type of the message
[in]	pduRef	Link responses to their requests
[in]	paramLength	The length of the parameter field
[in]	dataLength	The length of the data field
[in]	errorClass	The value of the error class
[in]	errorCode	The value of the error code

S7CommLayer() [2/2]

pcpp::S7CommLayer::S7CommLayer ( uint8_t *  data, size_t  dataLen, Layer *  prevLayer, Packet *  packet  )

inline

A constructor that creates the layer from an existing packet raw data

Parameters

[in]	data	A pointer to the raw data (will be casted to s7commhdr)
[in]	dataLen	Size of the data in bytes
[in]	prevLayer	A pointer to the previous layer
[in]	packet	A pointer to the Packet instance where layer will be stored in

Member Function Documentation

getDataLength()

uint16_t pcpp::S7CommLayer::getDataLength

(

)

const

Returns

S7comm data length

getErrorClass()

uint8_t pcpp::S7CommLayer::getErrorClass

(

)

const

Returns

S7comm error class

getErrorCode()

uint8_t pcpp::S7CommLayer::getErrorCode

(

)

const

Returns

S7comm error code

getHeaderLen()

size_t pcpp::S7CommLayer::getHeaderLen ( ) const

inlineoverridevirtual

Returns

Size of S7CommLayer

Implements pcpp::Layer.

getMsgType()

uint8_t pcpp::S7CommLayer::getMsgType

(

)

const

Returns

S7comm message type

getOsiModelLayer()

OsiModelLayer pcpp::S7CommLayer::getOsiModelLayer ( ) const

inlineoverridevirtual

Returns

The OSI Model layer this protocol belongs to

Implements pcpp::Layer.

getParameter()

const S7CommParameter* pcpp::S7CommLayer::getParameter

(

)

Returns

S7comm parameter

getParamLength()

uint16_t pcpp::S7CommLayer::getParamLength

(

)

const

Returns

S7comm parameter length

getPduRef()

uint16_t pcpp::S7CommLayer::getPduRef

(

)

const

Returns

S7comm PDU ref

getProtocolId()

uint8_t pcpp::S7CommLayer::getProtocolId

(

)

const

Returns

S7comm protocol id

isDataValid()

static bool pcpp::S7CommLayer::isDataValid ( const uint8_t *  data, size_t  dataSize  )

static

A static method that takes a byte array and detects whether it is a S7COMM

Parameters

[in]	data	A byte array
[in]	dataSize	The byte array size (in bytes)

Returns

True if the data looks like a valid S7COMM layer

setErrorClass()

void pcpp::S7CommLayer::setErrorClass

(

uint8_t

errorClass

)

const

Set the value of the error class

Parameters

[in]

errorClass

The value of the error class

setErrorCode()

void pcpp::S7CommLayer::setErrorCode

(

uint8_t

errorCode

)

const

Set the value of the error code

Parameters

[in]

errorCode

The value of the error code

setMsgType()

void pcpp::S7CommLayer::setMsgType

(

uint8_t

msgType

)

const

Set the value of the message type

Parameters

[in]

msgType

The value of the message type

setPduRef()

void pcpp::S7CommLayer::setPduRef

(

uint16_t

pduRef

)

const

Set the value of the PDU ref

Parameters

[in]

pduRef

The value of the PDU ref

toString()

std::string pcpp::S7CommLayer::toString ( ) const

overridevirtual

Returns

A string representation of the layer most important data (should look like the layer description in Wireshark)

Implements pcpp::Layer.