pcpp::PPPoEDiscoveryLayer Class Reference

#include <PPPoELayer.h>

Inheritance diagram for pcpp::PPPoEDiscoveryLayer:

Classes
class	PPPoETag
class	PPPoETagBuilder

Public Types
enum	PPPoETagTypes {   PPPOE_TAG_EOL = 0x0000, PPPOE_TAG_SVC_NAME = 0x0101, PPPOE_TAG_AC_NAME = 0x0102, PPPOE_TAG_HOST_UNIQ = 0x0103,   PPPOE_TAG_AC_COOKIE = 0x0104, PPPOE_TAG_VENDOR = 0x0105, PPPOE_TAG_CREDITS = 0x0106, PPPOE_TAG_METRICS = 0x0107,   PPPOE_TAG_SEQ_NUM = 0x0108, PPPOE_TAG_CRED_SCALE = 0x0109, PPPOE_TAG_RELAY_ID = 0x0110, PPPOE_TAG_HURL = 0x0111,   PPPOE_TAG_MOTM = 0x0112, PPPOE_TAG_MAX_PAYLD = 0x0120, PPPOE_TAG_IP_RT_ADD = 0x0121, PPPOE_TAG_SVC_ERR = 0x0201,   PPPOE_TAG_AC_ERR = 0x0202, PPPOE_TAG_GENERIC_ERR = 0x0203 }
Public Types inherited from pcpp::PPPoELayer
enum	PPPoECode {   PPPOE_CODE_SESSION = 0x00, PPPOE_CODE_PADO = 0x07, PPPOE_CODE_PADI = 0x09, PPPOE_CODE_PADG = 0x0a,   PPPOE_CODE_PADC = 0x0b, PPPOE_CODE_PADQ = 0x0c, PPPOE_CODE_PADR = 0x19, PPPOE_CODE_PADS = 0x65,   PPPOE_CODE_PADT = 0xa7, PPPOE_CODE_PADM = 0xd3, PPPOE_CODE_PADN = 0xd4 }

Public Member Functions
	PPPoEDiscoveryLayer (uint8_t *data, size_t dataLen, Layer *prevLayer, Packet *packet)
	PPPoEDiscoveryLayer (uint8_t version, uint8_t type, PPPoELayer::PPPoECode code, uint16_t sessionId)
PPPoETag	getTag (PPPoEDiscoveryLayer::PPPoETagTypes tagType) const
PPPoETag	getFirstTag () const
PPPoETag	getNextTag (const PPPoETag &tag) const
int	getTagCount () const
PPPoETag	addTag (const PPPoETagBuilder &tagBuilder)
PPPoETag	addTagAfter (const PPPoETagBuilder &tagBuilder, PPPoETagTypes prevTagType)
bool	removeTag (PPPoEDiscoveryLayer::PPPoETagTypes tagType)
bool	removeAllTags ()
virtual void	parseNextLayer ()
virtual size_t	getHeaderLen () const
virtual std::string	toString () const
Public Member Functions inherited from pcpp::PPPoELayer
pppoe_header *	getPPPoEHeader () const
virtual void	computeCalculateFields ()
OsiModelLayer	getOsiModelLayer () const
Public Member Functions inherited from pcpp::Layer
virtual	~Layer ()
Layer *	getNextLayer () const
Layer *	getPrevLayer () const
ProtocolType	getProtocol () 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

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

Detailed Description

Describes the PPPoE discovery protocol

Member Enumeration Documentation

PPPoETagTypes

enum pcpp::PPPoEDiscoveryLayer::PPPoETagTypes

PPPoE tag types

Enumerator
PPPOE_TAG_EOL	End-Of-List tag type
PPPOE_TAG_SVC_NAME	Service-Name tag type
PPPOE_TAG_AC_NAME	AC-Name tag type
PPPOE_TAG_HOST_UNIQ	Host-Uniq tag type
PPPOE_TAG_AC_COOKIE	AC-Cookie tag type
PPPOE_TAG_VENDOR	Vendor-Specific tag type
PPPOE_TAG_CREDITS	Credits tag type
PPPOE_TAG_METRICS	Metrics tag type
PPPOE_TAG_SEQ_NUM	Sequence Number tag type
PPPOE_TAG_CRED_SCALE	Credit Scale Factor tag type
PPPOE_TAG_RELAY_ID	Relay-Session-Id tag type
PPPOE_TAG_HURL	HURL tag type
PPPOE_TAG_MOTM	MOTM tag type
PPPOE_TAG_MAX_PAYLD	PPP-Max-Payload tag type
PPPOE_TAG_IP_RT_ADD	IP_Route_Add tag type
PPPOE_TAG_SVC_ERR	Service-Name-Error tag type
PPPOE_TAG_AC_ERR	AC-System-Error tag type
PPPOE_TAG_GENERIC_ERR	Generic-Error tag type

Constructor & Destructor Documentation

PPPoEDiscoveryLayer() [1/2]

pcpp::PPPoEDiscoveryLayer::PPPoEDiscoveryLayer ( 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 pppoe_header)
[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

PPPoEDiscoveryLayer() [2/2]

pcpp::PPPoEDiscoveryLayer::PPPoEDiscoveryLayer ( uint8_t  version, uint8_t  type, PPPoELayer::PPPoECode  code, uint16_t  sessionId  )

inline

A constructor that allocates a new PPPoE Discovery header with version, type, PPPoE code and session ID

Parameters

[in]	version	PPPoE version
[in]	type	PPPoE type
[in]	code	PPPoE code enum
[in]	sessionId	PPPoE session ID

Member Function Documentation

addTag()

PPPoETag pcpp::PPPoEDiscoveryLayer::addTag

(

const PPPoETagBuilder &

tagBuilder

)

Add a new PPPoE Tag at the end of the layer

Parameters

[in]

tagBuilder

A PPPoETagBuilder object that contains the requested tag data to add

Returns

A PPPoETag object containing the newly added PPPoE Tag data or logical NULL (PPPoETag::isNull() == true) if addition failed

addTagAfter()

PPPoETag pcpp::PPPoEDiscoveryLayer::addTagAfter	(	const PPPoETagBuilder &	tagBuilder,
		PPPoETagTypes	prevTagType
	)

Add a new PPPoE Tag after an existing one

Parameters

[in]	tagBuilder	A PPPoETagBuilder object that contains the requested tag data to add
[in]	prevTagType	The PPPoE Tag which the newly added tag will come after

Returns

A PPPoETag object containing the newly added PPPoE Tag data or logical NULL (PPPoETag::isNull() == true) if addition failed

getFirstTag()

PPPoETag pcpp::PPPoEDiscoveryLayer::getFirstTag

(

)

const

Returns

The first tag in the PPPoE discovery layer. If the current layer contains no tags the returned value will contain a logical NULL (PPPoETag::isNull() == true)

getHeaderLen()

virtual size_t pcpp::PPPoEDiscoveryLayer::getHeaderLen ( ) const

virtual

Returns

The header length which is size of strcut pppoe_header plus the total size of tags

Implements pcpp::Layer.

getNextTag()

PPPoETag pcpp::PPPoEDiscoveryLayer::getNextTag

(

const PPPoETag &

tag

)

const

Get the tag that comes right after the "tag" parameter. If the given tag is the last one, the returned value will contain a logical NULL (PPPoETag::isNull() == true)

Parameters

[in]

tag

A given tag

Returns

A PPPoETag object containing the tag that comes next, or logical NULL if the given tag: (1) was the last one; (2) contains a logical NULL or (3) doesn't belong to this packet

getTag()

PPPoETag pcpp::PPPoEDiscoveryLayer::getTag

(

PPPoEDiscoveryLayer::PPPoETagTypes

tagType

)

const

Get a PPPoE Tag by tag type.

Parameters

[in]

tagType

The type of the tag to search

Returns

A PPPoETag object that contains the first tag that matches this type, or logical NULL (PPPoETag::isNull() == true) if no such tag found

getTagCount()

int pcpp::PPPoEDiscoveryLayer::getTagCount

(

)

const

Returns

The number of tags in this layer

isDataValid()

bool pcpp::PPPoEDiscoveryLayer::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 byte stream of a packet
[in]	dataLen	The length of the byte stream

Returns

True if the data is valid and can represent a PPPoED packet

parseNextLayer()

virtual void pcpp::PPPoEDiscoveryLayer::parseNextLayer ( )

inlinevirtual

Does nothing for this layer (PPPoE discovery is always the last layer)

Implements pcpp::Layer.

removeAllTags()

bool pcpp::PPPoEDiscoveryLayer::removeAllTags

(

)

Remove all tags in this layer

Returns

True if all tags were successfully or false if removal failed for some reason (a proper error will be written to log)

removeTag()

bool pcpp::PPPoEDiscoveryLayer::removeTag

(

PPPoEDiscoveryLayer::PPPoETagTypes

tagType

)

Remove an existing tag. Tag will be found by the tag type

Parameters

[in]

tagType

The tag type to remove

Returns

True if tag was removed or false if tag wasn't found or if tag removal failed (in each case a proper error will be written to log)

toString()

virtual std::string pcpp::PPPoEDiscoveryLayer::toString ( ) const

inlinevirtual

Returns

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

Implements pcpp::Layer.