An implementation of PRR. More...
#include "tcp-prr-recovery.h"
Public Member Functions | |
TcpPrrRecovery () | |
Create an unbound tcp socket. | |
TcpPrrRecovery (const TcpPrrRecovery &sock) | |
Copy constructor. | |
~TcpPrrRecovery () override | |
void | DoRecovery (Ptr< TcpSocketState > tcb, uint32_t deliveredBytes, bool isDupAck) override |
Performs recovery based on the recovery algorithm. | |
void | EnterRecovery (Ptr< TcpSocketState > tcb, uint32_t dupAckCount, uint32_t unAckDataCount, uint32_t deliveredBytes) override |
Performs variable initialization at the start of recovery. | |
void | ExitRecovery (Ptr< TcpSocketState > tcb) override |
Performs cwnd adjustments at the end of recovery. | |
Ptr< TcpRecoveryOps > | Fork () override |
Copy the recovery algorithm across socket. | |
std::string | GetName () const override |
Get the name of the recovery algorithm. | |
void | UpdateBytesSent (uint32_t bytesSent) override |
Keeps track of bytes sent during recovery phase. | |
Public Member Functions inherited from ns3::TcpClassicRecovery | |
TcpClassicRecovery () | |
Constructor. | |
TcpClassicRecovery (const TcpClassicRecovery &recovery) | |
Copy constructor. | |
~TcpClassicRecovery () override | |
Constructor. | |
Public Member Functions inherited from ns3::TcpRecoveryOps | |
TcpRecoveryOps () | |
Constructor. | |
TcpRecoveryOps (const TcpRecoveryOps &other) | |
Copy constructor. | |
~TcpRecoveryOps () override | |
Deconstructor. | |
Public Member Functions inherited from ns3::Object | |
Object () | |
Constructor. | |
~Object () override | |
Destructor. | |
void | AggregateObject (Ptr< Object > other) |
Aggregate two Objects together. | |
void | Dispose () |
Dispose of this Object. | |
AggregateIterator | GetAggregateIterator () const |
Get an iterator to the Objects aggregated to this one. | |
TypeId | GetInstanceTypeId () const override |
Get the most derived TypeId for this Object. | |
template<typename T > | |
Ptr< T > | GetObject () const |
Get a pointer to the requested aggregated Object. | |
template<> | |
Ptr< Object > | GetObject () const |
Specialization of () for objects of type ns3::Object. | |
template<typename T > | |
Ptr< T > | GetObject (TypeId tid) const |
Get a pointer to the requested aggregated Object by TypeId. | |
template<> | |
Ptr< Object > | GetObject (TypeId tid) const |
Specialization of (TypeId tid) for objects of type ns3::Object. | |
void | Initialize () |
Invoke DoInitialize on all Objects aggregated to this one. | |
bool | IsInitialized () const |
Check if the object has been initialized. | |
void | UnidirectionalAggregateObject (Ptr< Object > other) |
Aggregate an Object to another Object. | |
Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter > | |
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. | |
Public Member Functions inherited from ns3::ObjectBase | |
virtual | ~ObjectBase () |
Virtual destructor. | |
void | GetAttribute (std::string name, AttributeValue &value, bool permissive=false) const |
Get the value of an attribute, raising fatal errors if unsuccessful. | |
bool | GetAttributeFailSafe (std::string name, AttributeValue &value) const |
Get the value of an attribute without raising errors. | |
void | SetAttribute (std::string name, const AttributeValue &value) |
Set a single attribute, raising fatal errors if unsuccessful. | |
bool | SetAttributeFailSafe (std::string name, const AttributeValue &value) |
Set a single attribute without raising errors. | |
bool | TraceConnect (std::string name, std::string context, const CallbackBase &cb) |
Connect a TraceSource to a Callback with a context. | |
bool | TraceConnectWithoutContext (std::string name, const CallbackBase &cb) |
Connect a TraceSource to a Callback without a context. | |
bool | TraceDisconnect (std::string name, std::string context, const CallbackBase &cb) |
Disconnect from a TraceSource a Callback previously connected with a context. | |
bool | TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb) |
Disconnect from a TraceSource a Callback previously connected without a context. | |
Static Public Member Functions | |
static TypeId | GetTypeId () |
Get the type ID. | |
Static Public Member Functions inherited from ns3::TcpClassicRecovery | |
static TypeId | GetTypeId () |
Get the type ID. | |
Static Public Member Functions inherited from ns3::TcpRecoveryOps | |
static TypeId | GetTypeId () |
Get the type ID. | |
Static Public Member Functions inherited from ns3::Object | |
static TypeId | GetTypeId () |
Register this type. | |
Static Public Member Functions inherited from ns3::ObjectBase | |
static TypeId | GetTypeId () |
Get the type ID. | |
Private Attributes | |
uint32_t | m_prrDelivered {0} |
total bytes delivered during recovery phase | |
uint32_t | m_prrOut {0} |
total bytes sent during recovery phase | |
uint32_t | m_recoveryFlightSize {0} |
value of bytesInFlight at the start of recovery phase | |
Additional Inherited Members | |
Protected Member Functions inherited from ns3::Object | |
Object (const Object &o) | |
Copy an Object. | |
virtual void | DoDispose () |
Destructor implementation. | |
virtual void | DoInitialize () |
Initialize() implementation. | |
virtual void | NotifyNewAggregate () |
Notify all Objects aggregated to this one of a new Object being aggregated. | |
Protected Member Functions inherited from ns3::ObjectBase | |
void | ConstructSelf (const AttributeConstructionList &attributes) |
Complete construction of ObjectBase; invoked by derived classes. | |
virtual void | NotifyConstructionCompleted () |
Notifier called once the ObjectBase is fully constructed. | |
Related Symbols inherited from ns3::ObjectBase | |
static TypeId | GetObjectIid () |
Ensure the TypeId for ObjectBase gets fully configured to anchor the inheritance tree properly. | |
An implementation of PRR.
PRR is an algorithm that determines TCP's sending rate in fast recovery. PRR avoids excessive window reductions and aims for the actual congestion window size at the end of recovery to be as close as possible to the window determined by the congestion control algorithm. PRR also improves accuracy of the amount of data sent during loss recovery.
Definition at line 31 of file tcp-prr-recovery.h.
ns3::TcpPrrRecovery::TcpPrrRecovery | ( | ) |
Create an unbound tcp socket.
Definition at line 34 of file tcp-prr-recovery.cc.
References NS_LOG_FUNCTION.
ns3::TcpPrrRecovery::TcpPrrRecovery | ( | const TcpPrrRecovery & | sock | ) |
Copy constructor.
sock | the object to copy |
Definition at line 40 of file tcp-prr-recovery.cc.
References NS_LOG_FUNCTION.
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override |
Definition at line 49 of file tcp-prr-recovery.cc.
References NS_LOG_FUNCTION.
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overridevirtual |
Performs recovery based on the recovery algorithm.
The function is called on arrival of every ack when TcpSocketState is set to CA_RECOVERY. It performs the necessary cwnd changes as per the recovery algorithm. The param isDupAck
has been added to align PRR implementation with RFC 6937 bis-08.
tcb | internal congestion state |
deliveredBytes | bytes (S)ACKed in the last (S)ACK |
isDupAck | Indicates if the last acknowledgement was duplicate. |
Reimplemented from ns3::TcpClassicRecovery.
Definition at line 70 of file tcp-prr-recovery.cc.
References m_prrDelivered, m_prrOut, m_recoveryFlightSize, and NS_LOG_FUNCTION.
Referenced by EnterRecovery().
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overridevirtual |
Performs variable initialization at the start of recovery.
The function is called when the TcpSocketState is changed to CA_RECOVERY.
tcb | internal congestion state |
dupAckCount | duplicate acknowledgement count |
unAckDataCount | total bytes of data unacknowledged |
deliveredBytes | bytes (S)ACKed in the last (S)ACK |
Reimplemented from ns3::TcpClassicRecovery.
Definition at line 55 of file tcp-prr-recovery.cc.
References DoRecovery(), m_prrDelivered, m_prrOut, m_recoveryFlightSize, and NS_LOG_FUNCTION.
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overridevirtual |
Performs cwnd adjustments at the end of recovery.
The function is called when the TcpSocketState is changed from CA_RECOVERY.
tcb | internal congestion state |
Reimplemented from ns3::TcpClassicRecovery.
Definition at line 118 of file tcp-prr-recovery.cc.
References NS_LOG_FUNCTION.
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overridevirtual |
Copy the recovery algorithm across socket.
Reimplemented from ns3::TcpClassicRecovery.
Definition at line 132 of file tcp-prr-recovery.cc.
References ns3::Object::CopyObject.
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overridevirtual |
Get the name of the recovery algorithm.
Reimplemented from ns3::TcpClassicRecovery.
Definition at line 138 of file tcp-prr-recovery.cc.
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static |
Get the type ID.
Definition at line 25 of file tcp-prr-recovery.cc.
References ns3::TypeId::SetParent().
Referenced by ns3::TcpL4Protocol::GetTypeId().
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overridevirtual |
Keeps track of bytes sent during recovery phase.
The function is called whenever a data packet is sent during recovery phase (optional).
bytesSent | bytes sent |
Reimplemented from ns3::TcpRecoveryOps.
Definition at line 125 of file tcp-prr-recovery.cc.
References m_prrOut, and NS_LOG_FUNCTION.
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private |
total bytes delivered during recovery phase
Definition at line 69 of file tcp-prr-recovery.h.
Referenced by DoRecovery(), and EnterRecovery().
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private |
total bytes sent during recovery phase
Definition at line 70 of file tcp-prr-recovery.h.
Referenced by DoRecovery(), EnterRecovery(), and UpdateBytesSent().
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private |
value of bytesInFlight at the start of recovery phase
Definition at line 71 of file tcp-prr-recovery.h.
Referenced by DoRecovery(), and EnterRecovery().