pcpp::IPv6RoutingHeader Class Reference

#include <IPv6Extensions.h>

Inheritance diagram for pcpp::IPv6RoutingHeader:

Classes
struct	ipv6_routing_header

Public Member Functions
	IPv6RoutingHeader (uint8_t routingType, uint8_t segmentsLeft, const uint8_t *additionalRoutingData, size_t additionalRoutingDataLen)
ipv6_routing_header *	getRoutingHeader () const
uint8_t *	getRoutingAdditionalData () const
size_t	getRoutingAdditionalDataLength () const
IPv6Address	getRoutingAdditionalDataAsIPv6Address (size_t offset=0) const
Public Member Functions inherited from pcpp::IPv6Extension
virtual size_t	getExtensionLen () const
IPv6ExtensionType	getExtensionType () const
virtual	~IPv6Extension ()
IPv6Extension *	getNextHeader () const

Additional Inherited Members
Public Types inherited from pcpp::IPv6Extension
enum	IPv6ExtensionType {   IPv6HopByHop = 0 , IPv6Routing = 43 , IPv6Fragmentation = 44 , IPv6AuthenticationHdr = 51 ,   IPv6Destination = 60 , IPv6ExtensionUnknown = 255 }

Detailed Description

Represents IPv6 routing extension header and allows easy access to all of its data

Constructor & Destructor Documentation

IPv6RoutingHeader()

pcpp::IPv6RoutingHeader::IPv6RoutingHeader	(	uint8_t	routingType,
		uint8_t	segmentsLeft,
		const uint8_t *	additionalRoutingData,
		size_t	additionalRoutingDataLen
	)

A c'tor for creating a new IPv6 routing extension object not bounded to a packet. Useful for adding new extensions to an IPv6 layer with IPv6Layer::addExtension()

Parameters

[in]	routingType	Routing type value (will be written to ipv6_routing_header::routingType field)
[in]	segmentsLeft	Segments left value (will be written to ipv6_routing_header::segmentsLeft field)
[in]	additionalRoutingData	A pointer to a buffer containing the additional routing data for this extension. Notice this buffer is read-only and its content isn't modified
[in]	additionalRoutingDataLen	The length of the additional routing data buffer

Member Function Documentation

getRoutingAdditionalData()

uint8_t* pcpp::IPv6RoutingHeader::getRoutingAdditionalData

(

)

const

Returns

A pointer to the buffer containing the additional routing data for this extension. Notice that any change in this buffer will lead to a change in the extension data

getRoutingAdditionalDataAsIPv6Address()

IPv6Address pcpp::IPv6RoutingHeader::getRoutingAdditionalDataAsIPv6Address

(

size_t

offset = 0

)

const

In many cases the additional routing data is actually IPv6 address(es). This method converts the raw buffer data into an IPv6 address

Parameters

[in]

offset

An offset in the additional routing buffer pointing to where the IPv6 address begins. In some cases there are multiple IPv6 addresses in the additional routing data buffer so this offset points to where the request IPv6 address begins. Also, even if there is only one IPv6 address in this buffer, sometimes it isn't written in the beginning of the buffer, so the offset points to where the IPv6 address begins. This is an optional parameter and the default offset is 0

Returns

The IPv6 address stored in the additional routing data buffer from the offset defined by the user. If offset is out-of-bounds of the extension of doesn't have 16 bytes (== the length of IPv6 address) until the end of the buffer - IPv6Address::Zero is returned

getRoutingAdditionalDataLength()

size_t pcpp::IPv6RoutingHeader::getRoutingAdditionalDataLength

(

)

const

Returns

The length of the additional routing parameters buffer

getRoutingHeader()

ipv6_routing_header* pcpp::IPv6RoutingHeader::getRoutingHeader ( ) const

inline

Get a pointer to the fixed part of the routing header. Notice the return pointer points directly to the data, so every change will modify the actual packet data

Returns

A pointer to the ipv6_routing_header