General error model that can be used to corrupt packets. More...

#include <error-model.h>

Inheritance diagram for ns3::ErrorModel:

Public Member Functions
void	Disable (void)

void	Enable (void)

bool	IsCorrupt (Ptr< Packet > pkt)

bool	IsEnabled (void) const

void	Reset (void)

Public Member Functions inherited from ns3::Object
void	AggregateObject (Ptr< Object > other)

void	Dispose (void)

AggregateIterator	GetAggregateIterator (void) const

virtual TypeId	GetInstanceTypeId (void) const

template<typename T >
Ptr< T >	GetObject (void) const

template<typename T >
Ptr< T >	GetObject (TypeId tid) const

void	Initialize (void)

Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
	SimpleRefCount (const SimpleRefCount &o)

uint32_t	GetReferenceCount (void) const

SimpleRefCount &	operator= (const SimpleRefCount &o)

void	Ref (void) const

void	Unref (void) const

Public Member Functions inherited from ns3::ObjectBase
void	GetAttribute (std::string name, AttributeValue &value) const

bool	GetAttributeFailSafe (std::string name, AttributeValue &attribute) const

void	SetAttribute (std::string name, const AttributeValue &value)

bool	SetAttributeFailSafe (std::string name, const AttributeValue &value)

bool	TraceConnect (std::string name, std::string context, const CallbackBase &cb)

bool	TraceConnectWithoutContext (std::string name, const CallbackBase &cb)

bool	TraceDisconnect (std::string name, std::string context, const CallbackBase &cb)

bool	TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb)

Static Public Member Functions
static TypeId	GetTypeId (void)

Static Public Member Functions inherited from ns3::Object
static TypeId	GetTypeId (void)

Static Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
static void	Cleanup (void)

Static Public Member Functions inherited from ns3::ObjectBase
static TypeId	GetTypeId (void)

Private Member Functions
virtual bool	DoCorrupt (Ptr< Packet >)=0

virtual void	DoReset (void)=0

Private Attributes
bool	m_enable

Additional Inherited Members
Protected Member Functions inherited from ns3::Object
	Object (const Object &o)

virtual void	DoDispose (void)

virtual void	DoInitialize (void)

virtual void	NotifyNewAggregate (void)

Protected Member Functions inherited from ns3::ObjectBase
void	ConstructSelf (const AttributeConstructionList &attributes)

virtual void	NotifyConstructionCompleted (void)

Detailed Description

General error model that can be used to corrupt packets.

This object is used to flag packets as being lost/errored or not. It is part of the Object framework and can be aggregated to other ns3 objects and handled by the Ptr class.

The main method is IsCorrupt(Ptr<Packet> p) which returns true if the packet is to be corrupted according to the underlying model. Depending on the error model, the packet itself may have its packet data buffer errored or not, or side information may be returned to the client in the form of a packet tag. (Note: No such error models that actually error the bits in a packet presently exist). The object can have state (resettable by Reset()). The object can also be enabled and disabled via two public member functions.

Typical code (simplified) to use an ErrorModel may look something like this:

Ptr<ErrorModel> rem = CreateObject<RateErrorModel> ();
Ptr<UniformRandomVariable> uv = CreateObject<UniformRandomVariable> ();
rem->SetRandomVariable (uv);
rem->SetRate (0.001);
...
Ptr<Packet> p;
if (rem->IsCorrupt (p))
  {
    dropTrace(p);
  } else {
    Forward (p);
  }

Four practical error models, a RateErrorModel, a BurstErrorModel, a ListErrorModel, and a ReceiveListErrorModel, are currently implemented.

Config Paths

ns3::ErrorModel is accessible through the following paths with Config::Set and Config::Connect:

/NodeList/[i]/DeviceList/[i]/$ns3::CsmaNetDevice/ReceiveErrorModel
/NodeList/[i]/DeviceList/[i]/$ns3::PointToPointNetDevice/ReceiveErrorModel
/NodeList/[i]/DeviceList/[i]/$ns3::SimpleNetDevice/ReceiveErrorModel

Attributes

IsEnabled: Whether this ErrorModel is enabled or not.
- Set with class: BooleanValue
- Underlying type: bool
- Initial value: true
- Flags: construct write read