LargeCommunitySpec Class Reference

This class encapsulates the wire-format representation of a BGP Large Community attribute and provides encoding, comparison, and canonicalization functions for Large Community attributes. More...

#include <community.h>

Inheritance diagram for LargeCommunitySpec:

Collaboration diagram for LargeCommunitySpec:

Public Member Functions
	LargeCommunitySpec ()
	Constructs a new instance using the attribute type and flags. More...
	LargeCommunitySpec (const BgpAttribute &rhs)
	Construct from an existing BgpAttribute. More...
virtual size_t	EncodeLength () const
	Compute the encoded length of the attribute. More...
virtual int	CompareTo (const BgpAttribute &rhs_attr) const
	Compare the attribute with another BgpAttribute. More...
virtual void	ToCanonical (BgpAttr *attr)
	Convert the attribute to its canonical form. More...
virtual std::string	ToString () const
	Generate a human-readable string representation. More...
Public Member Functions inherited from BgpAttribute
	BgpAttribute ()
	BgpAttribute (uint8_t code, uint8_t flags)
	BgpAttribute (uint8_t code, uint8_t subcode, uint8_t flags)
uint8_t	GetEncodeFlags () const
Public Member Functions inherited from ParseObject
virtual	~ParseObject ()

Public Attributes
std::vector< uint32_t >	communities
	Vector of community values. Each Large Community value consists of three 4-byte fields (12 bytes total). More...
Public Attributes inherited from BgpAttribute
uint8_t	code
uint8_t	subcode
uint8_t	flags

Static Public Attributes
static const int	kSize = -1
static const uint8_t	kFlags = Optional | Transitive
Static Public Attributes inherited from BgpAttribute
static const uint8_t	FLAG_MASK = Optional|Transitive

Additional Inherited Members
Public Types inherited from BgpAttribute
enum	Flag { Optional = 1 << 7 , Transitive = 1 << 6 , Partial = 1 << 5 , ExtendedLength = 1 << 4 }
enum	Code {   Reserved = 0 , Origin = 1 , AsPath = 2 , NextHop = 3 ,   MultiExitDisc = 4 , LocalPref = 5 , AtomicAggregate = 6 , Aggregator = 7 ,   Communities = 8 , OriginatorId = 9 , ClusterList = 10 , MPReachNlri = 14 ,   MPUnreachNlri = 15 , ExtendedCommunities = 16 , As4Path = 17 , As4Aggregator = 18 ,   PmsiTunnel = 22 , LargeCommunities = 32 , McastEdgeDiscovery = 241 , McastEdgeForwarding = 242 ,   OriginVnPath = 243 }
enum	Subcode {   OList = 1 , LabelBlock = 2 , SourceRd = 3 , Esi = 4 ,   Params = 5 , LeafOList = 6 , SubProtocol = 7 }

Detailed Description

This class encapsulates the wire-format representation of a BGP Large Community attribute and provides encoding, comparison, and canonicalization functions for Large Community attributes.

Definition at line 508 of file community.h.

Constructor & Destructor Documentation

LargeCommunitySpec() [1/2]

LargeCommunitySpec::LargeCommunitySpec ( )

inline

Constructs a new instance using the attribute type and flags.

Definition at line 521 of file community.h.

LargeCommunitySpec() [2/2]

LargeCommunitySpec::LargeCommunitySpec ( const BgpAttribute &  rhs )

inlineexplicit

Construct from an existing BgpAttribute.

Definition at line 524 of file community.h.

Member Function Documentation

CompareTo()

int LargeCommunitySpec::CompareTo ( const BgpAttribute &  rhs_attr ) const

virtual

Compare the attribute with another BgpAttribute.

Reimplemented from BgpAttribute.

Definition at line 969 of file community.cc.

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EncodeLength()

size_t LargeCommunitySpec::EncodeLength ( ) const

virtual

Compute the encoded length of the attribute.

Reimplemented from BgpAttribute.

Definition at line 965 of file community.cc.

ToCanonical()

void LargeCommunitySpec::ToCanonical ( BgpAttr *  attr )

virtual

Convert the attribute to its canonical form.

Reimplemented from BgpAttribute.

Definition at line 977 of file community.cc.

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ToString()

string LargeCommunitySpec::ToString ( ) const

virtual

Generate a human-readable string representation.

Reimplemented from BgpAttribute.

Definition at line 958 of file community.cc.

Member Data Documentation

communities

std::vector<uint32_t> LargeCommunitySpec::communities

Vector of community values. Each Large Community value consists of three 4-byte fields (12 bytes total).

Definition at line 532 of file community.h.

kFlags

const uint8_t LargeCommunitySpec::kFlags = Optional | Transitive

static

Flags indicating whether the attribute is Optional and Transitive per BGP standards.

Definition at line 517 of file community.h.

kSize

const int LargeCommunitySpec::kSize = -1

static

Indicates variable size of BGP attribute in encoded form (used internally by encoding functions). -1 means the total size depends on how many communities are present.

Definition at line 513 of file community.h.

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The documentation for this class was generated from the following files:

• community.h
• community.cc