ns3::EpcTftClassifier Class Reference

classifies IP packets according to Traffic Flow Templates (TFTs) More...

#include "epc-tft-classifier.h"

Inheritance diagram for ns3::EpcTftClassifier:

Collaboration diagram for ns3::EpcTftClassifier:

Public Member Functions
	EpcTftClassifier ()
void	Add (Ptr< EpcTft > tft, uint32_t id)
	add a TFT to the Classifier
uint32_t	Classify (Ptr< Packet > p, EpcTft::Direction direction, uint16_t protocolNumber)
	classify an IP packet
void	Delete (uint32_t id)
	delete an existing TFT from the classifier
Public Member Functions inherited from ns3::SimpleRefCount< EpcTftClassifier >
	SimpleRefCount ()
	Default constructor.
	SimpleRefCount (const SimpleRefCount &o)
	Copy constructor.
uint32_t	GetReferenceCount () const
	Get the reference count of the object.
SimpleRefCount &	operator= (const SimpleRefCount &o)
	Assignment operator.
void	Ref () const
	Increment the reference count.
void	Unref () const
	Decrement the reference count.

Protected Attributes
std::map< std::tuple< uint32_t, uint32_t, uint8_t, uint16_t >, std::pair< uint32_t, uint32_t > >	m_classifiedIpv4Fragments
	Map with already classified IPv4 Fragments An entry is added when the port info is available, i.e.
std::map< uint32_t, Ptr< EpcTft > >	m_tftMap
	TFT map.

Detailed Description

classifies IP packets according to Traffic Flow Templates (TFTs)

Note

this implementation works with IPv4 and IPv6. When there is fragmentation of IP packets, UDP/TCP ports maybe missing.

The following actions are performed to use the port info present in the first segment with the next fragments:

• Port info is stored if it is available, i.e. it is the first fragment with UDP/TCP protocol and there is enough data in the payload of the IP packet for the port numbers.
• Port info is used for the next fragments.
• Port info is deleted, when the last fragment is processed.

When we cannot cache the port info, the TFT of the default bearer is used. This may happen if there is reordering or losses of IP packets.

Definition at line 41 of file epc-tft-classifier.h.

Constructor & Destructor Documentation

EpcTftClassifier()

ns3::EpcTftClassifier::EpcTftClassifier

(

)

Definition at line 36 of file epc-tft-classifier.cc.

References NS_LOG_FUNCTION.

Member Function Documentation

Add()

void ns3::EpcTftClassifier::Add	(	Ptr< EpcTft >	tft,
		uint32_t	id )

add a TFT to the Classifier

Parameters

tft	the TFT to be added
id	the ID of the bearer which will be classified by specified TFT classifier

Definition at line 42 of file epc-tft-classifier.cc.

References m_tftMap, NS_ASSERT, and NS_LOG_FUNCTION.

Referenced by ns3::EpcUeNas::DoActivateEpsBearer().

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Classify()

uint32_t ns3::EpcTftClassifier::Classify	(	Ptr< Packet >	p,
		EpcTft::Direction	direction,
		uint16_t	protocolNumber )

classify an IP packet

Parameters

p	the IP packet. The outmost header can only be an IPv4 or an IPv6 header.
direction	the EPC TFT direction (can be downlink, uplink or bi-directional)
protocolNumber	the protocol of the packet. Only IPv4 and IPv6 are supported.

Returns

the identifier (>0) of the first TFT that matches with the IP packet; 0 if no TFT matched.

Definition at line 59 of file epc-tft-classifier.cc.

References ns3::EpcTft::DOWNLINK, ns3::Ipv4Address::Get(), ns3::Ipv4Header::GetDestination(), ns3::Ipv6Header::GetDestination(), ns3::TcpHeader::GetDestinationPort(), ns3::UdpHeader::GetDestinationPort(), ns3::Ipv4Header::GetFragmentOffset(), ns3::Ipv4Header::GetIdentification(), ns3::Ipv6Header::GetNextHeader(), ns3::Ipv4Header::GetPayloadSize(), ns3::Ipv4Header::GetProtocol(), ns3::Ipv4Header::GetSource(), ns3::Ipv6Header::GetSource(), ns3::TcpHeader::GetSourcePort(), ns3::UdpHeader::GetSourcePort(), ns3::Ipv4Header::GetTos(), ns3::Ipv6Header::GetTrafficClass(), ns3::Ipv4Header::IsLastFragment(), m_classifiedIpv4Fragments, m_tftMap, NS_ABORT_MSG, NS_ASSERT, NS_LOG_FUNCTION, NS_LOG_INFO, NS_LOG_LOGIC, ns3::Ipv4L3Protocol::PROT_NUMBER, ns3::Ipv6L3Protocol::PROT_NUMBER, ns3::TcpL4Protocol::PROT_NUMBER, ns3::UdpL4Protocol::PROT_NUMBER, and ns3::EpcTft::UPLINK.

Referenced by ns3::EpcUeNas::Send().

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Delete()

void ns3::EpcTftClassifier::Delete

(

uint32_t

id

)

delete an existing TFT from the classifier

Parameters

id	the identifier of the TFT to be deleted

Definition at line 52 of file epc-tft-classifier.cc.

References m_tftMap, and NS_LOG_FUNCTION.

Referenced by ns3::EpcUeNas::DoNotifyConnectionReleased().

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Member Data Documentation

m_classifiedIpv4Fragments

std::map<std::tuple<uint32_t, uint32_t, uint8_t, uint16_t>, std::pair<uint32_t, uint32_t> > ns3::EpcTftClassifier::m_classifiedIpv4Fragments

protected

Map with already classified IPv4 Fragments An entry is added when the port info is available, i.e.

first fragment, UDP/TCP protocols and enough payload data An entry is used if port info is not available, i.e. not first fragment or not enough payload data for TCP/UDP An entry is removed when the last fragment is classified Note: If last fragment is lost, entry is not removed

Definition at line 78 of file epc-tft-classifier.h.

Referenced by Classify().

m_tftMap

std::map<uint32_t, Ptr<EpcTft> > ns3::EpcTftClassifier::m_tftMap

protected

TFT map.

Definition at line 75 of file epc-tft-classifier.h.

Referenced by Add(), Classify(), and Delete().

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

• src/lte/model/epc-tft-classifier.h
• src/lte/model/epc-tft-classifier.cc