#include <ArpLayer.h>

Inheritance diagram for pcpp::ArpLayer:

Public Member Functions
	ArpLayer (uint8_t data, size_t dataLen, Layer prevLayer, Packet *packet)

	ArpLayer (ArpOpcode opCode, const MacAddress &senderMacAddr, const IPv4Address &senderIpAddr, const MacAddress &targetMacAddr, const IPv4Address &targetIpAddr)
	A constructor that creates an ARP header. More...

	ArpLayer (ArpOpcode opCode, const MacAddress &senderMacAddr, const MacAddress &targetMacAddr, const IPv4Address &senderIpAddr, const IPv4Address &targetIpAddr)

	ArpLayer (ArpRequest const &arpRequest)
	A constructor that creates an ARP request header. More...

	ArpLayer (ArpReply const &arpReply)
	A constructor that creates an ARP reply header. More...

	ArpLayer (GratuitousArpRequest const &gratuitousArpRequest)
	A constructor that creates a gratuitous ARP request header. More...

	ArpLayer (GratuitousArpReply const &gratuitousArpReply)
	A constructor that creates a gratuitous ARP reply header. More...

arphdr *	getArpHeader () const

ArpOpcode	getOpcode () const

MacAddress	getSenderMacAddress () const

MacAddress	getTargetMacAddress () const

IPv4Address	getSenderIpAddr () const

IPv4Address	getTargetIpAddr () const

void	parseNextLayer () override
	Does nothing for this layer (ArpLayer is always last)

size_t	getHeaderLen () const override

void	computeCalculateFields () override

ArpMessageType	getMessageType () const
	Attempts to determine the ARP message type based on the header signature. More...

bool	isRequest () const
	Is this packet an ARP request?

bool	isReply () const
	Is this packet an ARP reply?

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 dataLen)

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 an ARP protocol layer. Currently only IPv4 ARP messages are supported

Constructor & Destructor Documentation

◆ ArpLayer() [1/7]

pcpp::ArpLayer::ArpLayer	(	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 arphdr)
[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

◆ ArpLayer() [2/7]

pcpp::ArpLayer::ArpLayer	(	ArpOpcode	opCode,
		const MacAddress &	senderMacAddr,
		const IPv4Address &	senderIpAddr,
		const MacAddress &	targetMacAddr,
		const IPv4Address &	targetIpAddr
	)

A constructor that creates an ARP header.

Parameters

[in]	opCode	ARP message type (ARP request or ARP reply)
[in]	senderMacAddr	The sender MAC address (will be put in arphdr::senderMacAddr)
[in]	senderIpAddr	The sender IP address (will be put in arphdr::senderIpAddr)
[in]	targetMacAddr	The target MAC address (will be put in arphdr::targetMacAddr)
[in]	targetIpAddr	The target IP address (will be put in arphdr::targetIpAddr)

Remarks: No validation is done on the input parameters. The caller must ensure that the input creates a valid header.

◆ ArpLayer() [3/7]

pcpp::ArpLayer::ArpLayer	(	ArpOpcode	opCode,
		const MacAddress &	senderMacAddr,
		const MacAddress &	targetMacAddr,
		const IPv4Address &	senderIpAddr,
		const IPv4Address &	targetIpAddr
	)

A constructor that allocates a new ARP header

Parameters

[in]	opCode	ARP message type (ARP request or ARP reply)
[in]	senderMacAddr	The sender MAC address (will be put in arphdr::senderMacAddr)
[in]	targetMacAddr	The target MAC address (will be put in arphdr::targetMacAddr)
[in]	senderIpAddr	The sender IP address (will be put in arphdr::senderIpAddr)
[in]	targetIpAddr	The target IP address (will be put in arphdr::targetIpAddr)

Deprecated:: This constructor has been deprecated. Please use one of the other overloads.

Remarks: This constructor zeroes the target MAC address for ARP requests to keep backward compatibility.

◆ ArpLayer() [4/7]

pcpp::ArpLayer::ArpLayer ( ArpRequest const & arpRequest )

explicit

A constructor that creates an ARP request header.

Parameters

arpRequest The ARP request data

◆ ArpLayer() [5/7]

pcpp::ArpLayer::ArpLayer ( ArpReply const & arpReply )

explicit

A constructor that creates an ARP reply header.

Parameters

arpReply The ARP reply data

◆ ArpLayer() [6/7]

pcpp::ArpLayer::ArpLayer ( GratuitousArpRequest const & gratuitousArpRequest )

explicit

A constructor that creates a gratuitous ARP request header.

Parameters

gratuitousArpRequest The gratuitous ARP request data

◆ ArpLayer() [7/7]

pcpp::ArpLayer::ArpLayer ( GratuitousArpReply const & gratuitousArpReply )

explicit

A constructor that creates a gratuitous ARP reply header.

Parameters

gratuitousArpReply The gratuitous ARP reply data

Member Function Documentation

◆ computeCalculateFields()

void pcpp::ArpLayer::computeCalculateFields ( )

overridevirtual

Calculate the following fields:

arphdr::hardwareType = Ethernet (1)
arphdr::hardwareSize = 6
arphdr::protocolType = ETHERTYPE_IP (assume IPv4 over ARP)
arphdr::protocolSize = 4 (assume IPv4 over ARP)

Implements pcpp::Layer.

◆ getArpHeader()

arphdr* pcpp::ArpLayer::getArpHeader ( ) const

inline

Get a pointer to the ARP header. Notice this points directly to the data, so every change will change the actual packet data

Returns: A pointer to the arphdr

◆ getHeaderLen()

size_t pcpp::ArpLayer::getHeaderLen ( ) const

inlineoverridevirtual

Returns: The size of arphdr

Implements pcpp::Layer.

◆ getMessageType()

ArpMessageType pcpp::ArpLayer::getMessageType ( ) const

Attempts to determine the ARP message type based on the header signature.

Returns: An ArpMessageType representing the ARP message type.

◆ getOpcode()

ArpOpcode pcpp::ArpLayer::getOpcode ( ) const

Get the ARP opcode

Returns: The ARP opcode

Remarks: The opcode may not be one of the values in ArpOpcode

◆ getOsiModelLayer()

OsiModelLayer pcpp::ArpLayer::getOsiModelLayer ( ) const

inlineoverridevirtual

Returns: The OSI Model layer this protocol belongs to

Implements pcpp::Layer.

◆ getSenderIpAddr()

IPv4Address pcpp::ArpLayer::getSenderIpAddr ( ) const

inline

Get the sender protocol address (SPA) in the form of IPv4Address

Returns: An IPv4Address containing the sender protocol address (SPA)

◆ getSenderMacAddress()

MacAddress pcpp::ArpLayer::getSenderMacAddress ( ) const

inline

Get the sender hardware address (SHA) in the form of MacAddress

Returns: A MacAddress containing the sender hardware address (SHA)

◆ getTargetIpAddr()

IPv4Address pcpp::ArpLayer::getTargetIpAddr ( ) const

inline

Get the target protocol address (TPA) in the form of IPv4Address

Returns: An IPv4Address containing the target protocol address (TPA)

◆ getTargetMacAddress()

MacAddress pcpp::ArpLayer::getTargetMacAddress ( ) const

inline

Get the target hardware address (THA) in the form of MacAddress

Returns: A MacAddress containing the target hardware address (THA)

◆ isDataValid()

static bool pcpp::ArpLayer::isDataValid	(	const uint8_t *	data,
		size_t	dataLen
	)

inlinestatic

A static method that validates the input data

Parameters

[in]	data	The pointer to the beginning of a byte stream of an ARP layer
[in]	dataLen	The length of the byte stream

Returns: True if the data is valid and can represent an ARP layer

◆ toString()

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

overridevirtual

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

Implements pcpp::Layer.

Public Member Functions

Static Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ArpLayer() [1/7]

◆ ArpLayer() [2/7]

◆ ArpLayer() [3/7]

◆ ArpLayer() [4/7]

◆ ArpLayer() [5/7]

◆ ArpLayer() [6/7]

◆ ArpLayer() [7/7]

Member Function Documentation

◆ computeCalculateFields()

◆ getArpHeader()

◆ getHeaderLen()

◆ getMessageType()

◆ getOpcode()

◆ getOsiModelLayer()

◆ getSenderIpAddr()

◆ getSenderMacAddress()

◆ getTargetIpAddr()

◆ getTargetMacAddress()

◆ isDataValid()

◆ toString()