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A Discrete-Event Network Simulator
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API |
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A Discrete-Event Network Simulator
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API |
An implementation of a stream socket using TCP. More...
#include "tcp-westwood.h"
Inheritance diagram for ns3::TcpWestwood: Collaboration diagram for ns3::TcpWestwood:Public Types | |
| enum | FilterType { NONE, TUSTIN } |
| Filter type (None or Tustin) More... | |
| enum | ProtocolType { WESTWOOD, WESTWOODPLUS } |
| Protocol variant (Westwood or Westwood+) More... | |
| Public Types inherited from ns3::TcpSocket | |
| enum | TcpStates_t { CLOSED = 0, LISTEN, SYN_SENT, SYN_RCVD, ESTABLISHED, CLOSE_WAIT, LAST_ACK, FIN_WAIT_1, FIN_WAIT_2, CLOSING, TIME_WAIT, LAST_STATE } |
| Names of the 11 TCP states. More... | |
| Public Types inherited from ns3::Socket | |
| enum | SocketErrno { ERROR_NOTERROR, ERROR_ISCONN, ERROR_NOTCONN, ERROR_MSGSIZE, ERROR_AGAIN, ERROR_SHUTDOWN, ERROR_OPNOTSUPP, ERROR_AFNOSUPPORT, ERROR_INVAL, ERROR_BADF, ERROR_NOROUTETOHOST, ERROR_NODEV, ERROR_ADDRNOTAVAIL, ERROR_ADDRINUSE, SOCKET_ERRNO_LAST } |
| Enumeration of the possible errors returned by a socket. More... | |
| enum | SocketType { NS3_SOCK_STREAM, NS3_SOCK_SEQPACKET, NS3_SOCK_DGRAM, NS3_SOCK_RAW } |
| Enumeration of the possible socket types. More... | |
Public Member Functions | |
| TcpWestwood (void) | |
| TcpWestwood (const TcpWestwood &sock) | |
| Copy constructor. More... | |
| virtual | ~TcpWestwood (void) |
| Public Member Functions inherited from ns3::TcpSocketBase | |
| TcpSocketBase (void) | |
| Create an unbound TCP socket. More... | |
| TcpSocketBase (const TcpSocketBase &sock) | |
| Clone a TCP socket, for use upon receiving a connection request in LISTEN state. More... | |
| virtual | ~TcpSocketBase (void) |
| virtual int | Bind (void) |
| Allocate a local IPv4 endpoint for this socket. More... | |
| virtual int | Bind (const Address &address) |
| Allocate a local endpoint for this socket. More... | |
| virtual int | Bind6 (void) |
| Allocate a local IPv6 endpoint for this socket. More... | |
| virtual void | BindToNetDevice (Ptr< NetDevice > netdevice) |
| Bind a socket to specific device. More... | |
| virtual int | Close (void) |
| Close a socket. More... | |
| virtual int | Connect (const Address &address) |
| Initiate a connection to a remote host. More... | |
| Time | GetClockGranularity (void) const |
| Get the Clock Granularity (used in RTO calcs). More... | |
| virtual enum SocketErrno | GetErrno (void) const |
| Get last error number. More... | |
| Time | GetMinRto (void) const |
| Get the Minimum RTO. More... | |
| virtual Ptr< Node > | GetNode (void) const |
| Return the node this socket is associated with. More... | |
| virtual uint32_t | GetRxAvailable (void) const |
| Return number of bytes which can be returned from one or multiple calls to Recv. More... | |
| Ptr< TcpRxBuffer > | GetRxBuffer (void) const |
| Get a pointer to the Rx buffer. More... | |
| virtual enum SocketType | GetSocketType (void) const |
| virtual int | GetSockName (Address &address) const |
| Get socket address. More... | |
| virtual uint32_t | GetTxAvailable (void) const |
| Returns the number of bytes which can be sent in a single call to Send. More... | |
| Ptr< TcpTxBuffer > | GetTxBuffer (void) const |
| Get a pointer to the Tx buffer. More... | |
| virtual int | Listen (void) |
| Listen for incoming connections. More... | |
| virtual Ptr< Packet > | Recv (uint32_t maxSize, uint32_t flags) |
| Read data from the socket. More... | |
| virtual Ptr< Packet > | RecvFrom (uint32_t maxSize, uint32_t flags, Address &fromAddress) |
| Read a single packet from the socket and retrieve the sender address. More... | |
| virtual int | Send (Ptr< Packet > p, uint32_t flags) |
| Send data (or dummy data) to the remote host. More... | |
| virtual int | SendTo (Ptr< Packet > p, uint32_t flags, const Address &toAddress) |
| Send data to a specified peer. More... | |
| void | SetClockGranularity (Time clockGranularity) |
| Sets the Clock Granularity (used in RTO calcs). More... | |
| void | SetMinRto (Time minRto) |
| Sets the Minimum RTO. More... | |
| virtual void | SetNode (Ptr< Node > node) |
| Set the associated node. More... | |
| virtual void | SetRtt (Ptr< RttEstimator > rtt) |
| Set the associated RTT estimator. More... | |
| virtual void | SetTcp (Ptr< TcpL4Protocol > tcp) |
| Set the associated TCP L4 protocol. More... | |
| virtual int | ShutdownRecv (void) |
| virtual int | ShutdownSend (void) |
| Public Member Functions inherited from ns3::TcpSocket | |
| TcpSocket (void) | |
| virtual | ~TcpSocket (void) |
| Public Member Functions inherited from ns3::Socket | |
| Socket (void) | |
| virtual | ~Socket (void) |
| Ptr< NetDevice > | GetBoundNetDevice () |
| Returns socket's bound netdevice, if any. More... | |
| uint8_t | GetIpTos (void) const |
| Query the value of IP Type of Service of this socket. More... | |
| virtual uint8_t | GetIpTtl (void) const |
| Query the value of IP Time to Live field of this socket. More... | |
| virtual uint8_t | GetIpv6HopLimit (void) const |
| Query the value of IP Hop Limit field of this socket. More... | |
| uint8_t | GetIpv6Tclass (void) const |
| Query the value of IPv6 Traffic Class field of this socket. More... | |
| bool | IsIpRecvTos (void) const |
| Ask if the socket is currently passing information about IP Type of Service up the stack. More... | |
| bool | IsIpRecvTtl (void) const |
| Ask if the socket is currently passing information about IP_TTL up the stack. More... | |
| bool | IsIpv6RecvHopLimit (void) const |
| Ask if the socket is currently passing information about IPv6 Hop Limit up the stack. More... | |
| bool | IsIpv6RecvTclass (void) const |
| Ask if the socket is currently passing information about IPv6 Traffic Class up the stack. More... | |
| bool | IsRecvPktInfo () const |
| Get status indicating whether enable/disable packet information to socket. More... | |
| Ptr< Packet > | Recv (void) |
| Read a single packet from the socket. More... | |
| int | Recv (uint8_t *buf, uint32_t size, uint32_t flags) |
| Recv data (or dummy data) from the remote host. More... | |
| Ptr< Packet > | RecvFrom (Address &fromAddress) |
| Read a single packet from the socket and retrieve the sender address. More... | |
| int | RecvFrom (uint8_t *buf, uint32_t size, uint32_t flags, Address &fromAddress) |
| Read a single packet from the socket and retrieve the sender address. More... | |
| int | Send (Ptr< Packet > p) |
| Send data (or dummy data) to the remote host. More... | |
| int | Send (const uint8_t *buf, uint32_t size, uint32_t flags) |
| Send data (or dummy data) to the remote host. More... | |
| int | SendTo (const uint8_t *buf, uint32_t size, uint32_t flags, const Address &address) |
| Send data to a specified peer. More... | |
| void | SetAcceptCallback (Callback< bool, Ptr< Socket >, const Address & > connectionRequest, Callback< void, Ptr< Socket >, const Address & > newConnectionCreated) |
| Accept connection requests from remote hosts. More... | |
| void | SetCloseCallbacks (Callback< void, Ptr< Socket > > normalClose, Callback< void, Ptr< Socket > > errorClose) |
| Detect socket recv() events such as graceful shutdown or error. More... | |
| void | SetConnectCallback (Callback< void, Ptr< Socket > > connectionSucceeded, Callback< void, Ptr< Socket > > connectionFailed) |
| Specify callbacks to allow the caller to determine if the connection succeeds of fails. More... | |
| void | SetDataSentCallback (Callback< void, Ptr< Socket >, uint32_t > dataSent) |
| Notify application when a packet has been sent from transport protocol (non-standard socket call) More... | |
| void | SetIpRecvTos (bool ipv4RecvTos) |
| Tells a socket to pass information about IP Type of Service up the stack. More... | |
| void | SetIpRecvTtl (bool ipv4RecvTtl) |
| Tells a socket to pass information about IP_TTL up the stack. More... | |
| void | SetIpTos (uint8_t ipTos) |
| Manually set IP Type of Service field. More... | |
| virtual void | SetIpTtl (uint8_t ipTtl) |
| Manually set IP Time to Live field. More... | |
| virtual void | SetIpv6HopLimit (uint8_t ipHopLimit) |
| Manually set IPv6 Hop Limit. More... | |
| void | SetIpv6RecvHopLimit (bool ipv6RecvHopLimit) |
| Tells a socket to pass information about IPv6 Hop Limit up the stack. More... | |
| void | SetIpv6RecvTclass (bool ipv6RecvTclass) |
| Tells a socket to pass information about IPv6 Traffic Class up the stack. More... | |
| void | SetIpv6Tclass (int ipTclass) |
| Manually set IPv6 Traffic Class field. More... | |
| void | SetRecvCallback (Callback< void, Ptr< Socket > >) |
| Notify application when new data is available to be read. More... | |
| void | SetRecvPktInfo (bool flag) |
| Enable/Disable receive packet information to socket. More... | |
| void | SetSendCallback (Callback< void, Ptr< Socket >, uint32_t > sendCb) |
| Notify application when space in transmit buffer is added. More... | |
| Public Member Functions inherited from ns3::Object | |
| Object () | |
| Constructor. More... | |
| virtual | ~Object () |
| Destructor. More... | |
| void | AggregateObject (Ptr< Object > other) |
| Aggregate two Objects together. More... | |
| void | Dispose (void) |
| Dispose of this Object. More... | |
| AggregateIterator | GetAggregateIterator (void) const |
| Get an iterator to the Objects aggregated to this one. More... | |
| virtual TypeId | GetInstanceTypeId (void) const |
| Implement the GetInstanceTypeId method defined in ObjectBase. More... | |
| template<typename T > | |
| Ptr< T > | GetObject (void) const |
| Get a pointer to the requested aggregated Object. More... | |
| template<typename T > | |
| Ptr< T > | GetObject (TypeId tid) const |
| Get a pointer to the requested aggregated Object by TypeId. More... | |
| void | Initialize (void) |
| Invoke DoInitialize on all Objects aggregated to this one. More... | |
| Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter > | |
| SimpleRefCount () | |
| Constructor. More... | |
| SimpleRefCount (const SimpleRefCount &o) | |
| Copy constructor. More... | |
| uint32_t | GetReferenceCount (void) const |
| Get the reference count of the object. More... | |
| SimpleRefCount & | operator= (const SimpleRefCount &o) |
| Assignment. More... | |
| void | Ref (void) const |
| Increment the reference count. More... | |
| void | Unref (void) const |
| Decrement the reference count. More... | |
| Public Member Functions inherited from ns3::ObjectBase | |
| virtual | ~ObjectBase () |
| Virtual destructor. More... | |
| void | GetAttribute (std::string name, AttributeValue &value) const |
| Get the value of an attribute, raising fatal errors if unsuccessful. More... | |
| bool | GetAttributeFailSafe (std::string name, AttributeValue &value) const |
| Get the value of an attribute without raising erros. More... | |
| void | SetAttribute (std::string name, const AttributeValue &value) |
| Set a single attribute, raising fatal errors if unsuccessful. More... | |
| bool | SetAttributeFailSafe (std::string name, const AttributeValue &value) |
| Set a single attribute without raising errors. More... | |
| bool | TraceConnect (std::string name, std::string context, const CallbackBase &cb) |
| Connect a TraceSource to a Callback with a context. More... | |
| bool | TraceConnectWithoutContext (std::string name, const CallbackBase &cb) |
| Connect a TraceSource to a Callback without a context. More... | |
| bool | TraceDisconnect (std::string name, std::string context, const CallbackBase &cb) |
| Disconnect from a TraceSource a Callback previously connected with a context. More... | |
| bool | TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb) |
| Disconnect from a TraceSource a Callback previously connected without a context. More... | |
Static Public Member Functions | |
| static TypeId | GetTypeId (void) |
| Get the type ID. More... | |
| Static Public Member Functions inherited from ns3::TcpSocketBase | |
| static TypeId | GetTypeId (void) |
| Get the type ID. More... | |
| Static Public Member Functions inherited from ns3::TcpSocket | |
| static TypeId | GetTypeId (void) |
| Get the type ID. More... | |
| Static Public Member Functions inherited from ns3::Socket | |
| static Ptr< Socket > | CreateSocket (Ptr< Node > node, TypeId tid) |
| This method wraps the creation of sockets that is performed on a given node by a SocketFactory specified by TypeId. More... | |
| static TypeId | GetTypeId (void) |
| Get the type ID. More... | |
| Static Public Member Functions inherited from ns3::Object | |
| static TypeId | GetTypeId (void) |
| Register this type. More... | |
| Static Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter > | |
| static void | Cleanup (void) |
| Noop. More... | |
| Static Public Member Functions inherited from ns3::ObjectBase | |
| static TypeId | GetTypeId (void) |
| Get the type ID. More... | |
Protected Member Functions | |
| virtual void | DupAck (const TcpHeader &t, uint32_t count) |
| Received dupack (duplicate ACK) More... | |
| virtual void | EstimateRtt (const TcpHeader &header) |
| Estimate the RTT, record the minimum value, and run a clock on the RTT to trigger Westwood+ bandwidth sampling. More... | |
| virtual Ptr< TcpSocketBase > | Fork (void) |
| Call CopyObject<> to clone me. More... | |
| virtual void | NewAck (SequenceNumber32 const &seq) |
| Update buffers w.r.t. More... | |
| virtual void | ReceivedAck (Ptr< Packet > packet, const TcpHeader &tcpHeader) |
| Process the newly received ACK. More... | |
| virtual void | Retransmit (void) |
| Halving cwnd and call DoRetransmit() More... | |
| Protected Member Functions inherited from ns3::TcpSocketBase | |
| virtual void | AddOptions (TcpHeader &tcpHeader) |
| Add options to TcpHeader. More... | |
| void | AddOptionTimestamp (TcpHeader &header) |
| Add the timestamp option to the header. More... | |
| void | AddOptionWScale (TcpHeader &header) |
| Add the window scale option to the header. More... | |
| virtual uint16_t | AdvertisedWindowSize (void) |
| The amount of Rx window announced to the peer. More... | |
| virtual uint32_t | AvailableWindow (void) |
| Return unfilled portion of window. More... | |
| virtual uint32_t | BytesInFlight (void) |
| Return total bytes in flight. More... | |
| uint8_t | CalculateWScale () const |
| Calculate window scale value based on receive buffer space. More... | |
| void | CancelAllTimers (void) |
| Cancel all timer when endpoint is deleted. More... | |
| void | CloseAndNotify (void) |
| Peacefully close the socket by notifying the upper layer and deallocate end point. More... | |
| void | CompleteFork (Ptr< Packet > p, const TcpHeader &tcpHeader, const Address &fromAddress, const Address &toAddress) |
| Complete a connection by forking the socket. More... | |
| void | ConnectionSucceeded (void) |
| Schedule-friendly wrapper for Socket::NotifyConnectionSucceeded() More... | |
| void | DeallocateEndPoint (void) |
| Deallocate m_endPoint and m_endPoint6. More... | |
| virtual void | DelAckTimeout (void) |
| Action upon delay ACK timeout, i.e. More... | |
| void | Destroy (void) |
| Kill this socket by zeroing its attributes (IPv4) More... | |
| void | Destroy6 (void) |
| Kill this socket by zeroing its attributes (IPv6) More... | |
| int | DoClose (void) |
| Close a socket by sending RST, FIN, or FIN+ACK, depend on the current state. More... | |
| int | DoConnect (void) |
| Perform the real connection tasks: Send SYN if allowed, RST if invalid. More... | |
| virtual void | DoForwardUp (Ptr< Packet > packet, const Address &fromAddress, const Address &toAddress) |
| Called by TcpSocketBase::ForwardUp{,6}(). More... | |
| void | DoPeerClose (void) |
| FIN is in sequence, notify app and respond with a FIN. More... | |
| virtual void | DoRetransmit (void) |
| Retransmit the oldest packet. More... | |
| void | ForwardIcmp (Ipv4Address icmpSource, uint8_t icmpTtl, uint8_t icmpType, uint8_t icmpCode, uint32_t icmpInfo) |
| Called by the L3 protocol when it received an ICMP packet to pass on to TCP. More... | |
| void | ForwardIcmp6 (Ipv6Address icmpSource, uint8_t icmpTtl, uint8_t icmpType, uint8_t icmpCode, uint32_t icmpInfo) |
| Called by the L3 protocol when it received an ICMPv6 packet to pass on to TCP. More... | |
| void | ForwardUp (Ptr< Packet > packet, Ipv4Header header, uint16_t port, Ptr< Ipv4Interface > incomingInterface) |
| Called by the L3 protocol when it received a packet to pass on to TCP. More... | |
| void | ForwardUp6 (Ptr< Packet > packet, Ipv6Header header, uint16_t port, Ptr< Ipv6Interface > incomingInterface) |
| Called by the L3 protocol when it received a packet to pass on to TCP. More... | |
| virtual bool | GetAllowBroadcast (void) const |
| Query whether broadcast datagram transmissions are allowed. More... | |
| virtual uint32_t | GetConnCount (void) const |
| Get the number of connection retries before giving up. More... | |
| virtual Time | GetConnTimeout (void) const |
| Get the connection timeout. More... | |
| virtual uint32_t | GetDelAckMaxCount (void) const |
| Get the number of packet to fire an ACK before delay timeout. More... | |
| virtual Time | GetDelAckTimeout (void) const |
| Get the time to delay an ACK. More... | |
| virtual uint32_t | GetInitialCwnd (void) const |
| Get the initial Congestion Window. More... | |
| virtual uint32_t | GetInitialSSThresh (void) const |
| Get the initial Slow Start Threshold. More... | |
| virtual Time | GetPersistTimeout (void) const |
| Get the timout for persistent connection. More... | |
| virtual uint32_t | GetRcvBufSize (void) const |
| Get the receive buffer size. More... | |
| virtual uint32_t | GetSegSize (void) const |
| Get the segment size. More... | |
| virtual uint32_t | GetSndBufSize (void) const |
| Get the send buffer size. More... | |
| virtual bool | GetTcpNoDelay (void) const |
| Check if Nagle's algorithm is enabled or not. More... | |
| virtual void | InitializeCwnd () |
| Initialize congestion window. More... | |
| virtual void | LastAckTimeout (void) |
| Timeout at LAST_ACK, close the connection. More... | |
| bool | OutOfRange (SequenceNumber32 head, SequenceNumber32 tail) const |
| Check if a sequence number range is within the rx window. More... | |
| void | PeerClose (Ptr< Packet > p, const TcpHeader &tcpHeader) |
| Received a FIN from peer, notify rx buffer. More... | |
| virtual void | PersistTimeout (void) |
| Send 1 byte probe to get an updated window size. More... | |
| void | ProcessClosing (Ptr< Packet > packet, const TcpHeader &tcpHeader) |
| Received a packet upon CLOSING. More... | |
| void | ProcessEstablished (Ptr< Packet > packet, const TcpHeader &tcpHeader) |
| Received a packet upon ESTABLISHED state. More... | |
| void | ProcessLastAck (Ptr< Packet > packet, const TcpHeader &tcpHeader) |
| Received a packet upon LAST_ACK. More... | |
| void | ProcessListen (Ptr< Packet > packet, const TcpHeader &tcpHeader, const Address &fromAddress, const Address &toAddress) |
| Received a packet upon LISTEN state. More... | |
| void | ProcessOptionTimestamp (const Ptr< const TcpOption > option) |
| Process the timestamp option from other side. More... | |
| void | ProcessOptionWScale (const Ptr< const TcpOption > option) |
| Read and parse the Window scale option. More... | |
| void | ProcessSynRcvd (Ptr< Packet > packet, const TcpHeader &tcpHeader, const Address &fromAddress, const Address &toAddress) |
| Received a packet upon SYN_RCVD. More... | |
| void | ProcessSynSent (Ptr< Packet > packet, const TcpHeader &tcpHeader) |
| Received a packet upon SYN_SENT. More... | |
| void | ProcessWait (Ptr< Packet > packet, const TcpHeader &tcpHeader) |
| Received a packet upon CLOSE_WAIT, FIN_WAIT_1, FIN_WAIT_2. More... | |
| virtual void | ReadOptions (const TcpHeader &tcpHeader) |
| Read TCP options from incoming packets. More... | |
| virtual void | ReceivedData (Ptr< Packet > packet, const TcpHeader &tcpHeader) |
| Recv of a data, put into buffer, call L7 to get it if necessary. More... | |
| virtual void | ReTxTimeout (void) |
| Call Retransmit() upon RTO event. More... | |
| virtual void | ScaleSsThresh (uint8_t scaleFactor) |
| Scale the initial SsThresh value to the correct one. More... | |
| uint32_t | SendDataPacket (SequenceNumber32 seq, uint32_t maxSize, bool withAck) |
| Extract at most maxSize bytes from the TxBuffer at sequence seq, add the TCP header, and send to TcpL4Protocol. More... | |
| void | SendEmptyPacket (uint8_t flags) |
| Send a empty packet that carries a flag, e.g. More... | |
| bool | SendPendingData (bool withAck=false) |
| Send as much pending data as possible according to the Tx window. More... | |
| void | SendRST (void) |
| Send reset and tear down this socket. More... | |
| virtual bool | SetAllowBroadcast (bool allowBroadcast) |
| Configure whether broadcast datagram transmissions are allowed. More... | |
| virtual void | SetConnCount (uint32_t count) |
| Set the number of connection retries before giving up. More... | |
| virtual void | SetConnTimeout (Time timeout) |
| Set the connection timeout. More... | |
| virtual void | SetDelAckMaxCount (uint32_t count) |
| Set the number of packet to fire an ACK before delay timeout. More... | |
| virtual void | SetDelAckTimeout (Time timeout) |
| Set the time to delay an ACK. More... | |
| virtual void | SetInitialCwnd (uint32_t cwnd) |
| Set the initial Congestion Window. More... | |
| virtual void | SetInitialSSThresh (uint32_t threshold) |
| Set the initial Slow Start Threshold. More... | |
| virtual void | SetPersistTimeout (Time timeout) |
| Set the timout for persistent connection. More... | |
| virtual void | SetRcvBufSize (uint32_t size) |
| Set the receive buffer size. More... | |
| virtual void | SetSegSize (uint32_t size) |
| Set the segment size. More... | |
| virtual void | SetSndBufSize (uint32_t size) |
| Set the send buffer size. More... | |
| virtual void | SetTcpNoDelay (bool noDelay) |
| Enable/Disable Nagle's algorithm. More... | |
| int | SetupCallback (void) |
| Common part of the two Bind(), i.e. More... | |
| int | SetupEndpoint (void) |
| Configure the endpoint to a local address. More... | |
| int | SetupEndpoint6 (void) |
| Configure the endpoint v6 to a local address. More... | |
| void | TimeWait (void) |
| Move from CLOSING or FIN_WAIT_2 to TIME_WAIT state. More... | |
| virtual uint32_t | UnAckDataCount (void) |
| Return count of number of unacked bytes. More... | |
| void | UpdateWindowSize (const TcpHeader &header) |
| Update the receiver window (RWND) based on the value of the window field in the header. More... | |
| virtual uint32_t | Window (void) |
| Return the max possible number of unacked bytes. More... | |
| Protected Member Functions inherited from ns3::Socket | |
| virtual void | DoDispose (void) |
| Destructor implementation. More... | |
| bool | IsManualIpTos (void) const |
| Checks if the socket has a specific IPv4 ToS set. More... | |
| bool | IsManualIpTtl (void) const |
| Checks if the socket has a specific IPv4 TTL set. More... | |
| bool | IsManualIpv6HopLimit (void) const |
| Checks if the socket has a specific IPv6 Hop Limit set. More... | |
| bool | IsManualIpv6Tclass (void) const |
| Checks if the socket has a specific IPv6 Tclass set. More... | |
| void | NotifyConnectionFailed (void) |
| Notify through the callback (if set) that the connection has not been established due to an error. More... | |
| bool | NotifyConnectionRequest (const Address &from) |
| Notify through the callback (if set) that an incoming connection is being requested by a remote host. More... | |
| void | NotifyConnectionSucceeded (void) |
| Notify through the callback (if set) that the connection has been established. More... | |
| void | NotifyDataRecv (void) |
| Notify through the callback (if set) that some data have been received. More... | |
| void | NotifyDataSent (uint32_t size) |
| Notify through the callback (if set) that some data have been sent. More... | |
| void | NotifyErrorClose (void) |
| Notify through the callback (if set) that the connection has been closed due to an error. More... | |
| void | NotifyNewConnectionCreated (Ptr< Socket > socket, const Address &from) |
| Notify through the callback (if set) that a new connection has been created. More... | |
| void | NotifyNormalClose (void) |
| Notify through the callback (if set) that the connection has been closed. More... | |
| void | NotifySend (uint32_t spaceAvailable) |
| Notify through the callback (if set) that some data have been sent. More... | |
| Protected Member Functions inherited from ns3::Object | |
| Object (const Object &o) | |
| Copy an Object. More... | |
| virtual void | DoInitialize (void) |
| Initialize() implementation. More... | |
| virtual void | NotifyNewAggregate (void) |
| Notify all Objects aggregated to this one of a new Object being aggregated. More... | |
| Protected Member Functions inherited from ns3::ObjectBase | |
| void | ConstructSelf (const AttributeConstructionList &attributes) |
| Complete construction of ObjectBase; invoked by derived classes. More... | |
| virtual void | NotifyConstructionCompleted (void) |
| Notifier called once the ObjectBase is fully constructed. More... | |
Protected Attributes | |
| int | m_accountedFor |
| The number of received DUPACKs. More... | |
| int | m_ackedSegments |
| The number of segments ACKed between RTTs. More... | |
| EventId | m_bwEstimateEvent |
| The BW estimation event for Westwood+. More... | |
| TracedValue< double > | m_currentBW |
| Current value of the estimated BW. More... | |
| enum FilterType | m_fType |
| 0 for none, 1 for Tustin More... | |
| bool | m_inFastRec |
| Currently in fast recovery if TRUE. More... | |
| bool | m_IsCount |
| Start keeping track of m_ackedSegments for Westwood+ if TRUE. More... | |
| double | m_lastAck |
| The time last ACK was received. More... | |
| double | m_lastBW |
| Last bandwidth sample after being filtered. More... | |
| double | m_lastSampleBW |
| Last bandwidth sample. More... | |
| Time | m_minRtt |
| Minimum RTT. More... | |
| SequenceNumber32 | m_prevAckNo |
| Previously received ACK number. More... | |
| enum ProtocolType | m_pType |
| 0 for Westwood, 1 for Westwood+ More... | |
| Protected Attributes inherited from ns3::TcpSocketBase | |
| Time | m_clockGranularity |
| Clock Granularity used in RTO calcs. More... | |
| bool | m_closeNotified |
| Told app to close socket. More... | |
| bool | m_closeOnEmpty |
| Close socket upon tx buffer emptied. More... | |
| uint32_t | m_cnCount |
| Count of remaining connection retries. More... | |
| uint32_t | m_cnRetries |
| Number of connection retries before giving up. More... | |
| Time | m_cnTimeout |
| Timeout for connection retry. More... | |
| bool | m_connected |
| Connection established. More... | |
| TracedValue< uint32_t > | m_cWnd |
| Congestion window. More... | |
| uint32_t | m_delAckCount |
| Delayed ACK counter. More... | |
| EventId | m_delAckEvent |
| Delayed ACK timeout event. More... | |
| uint32_t | m_delAckMaxCount |
| Number of packet to fire an ACK before delay timeout. More... | |
| Time | m_delAckTimeout |
| Time to delay an ACK. More... | |
| uint32_t | m_dupAckCount |
| Dupack counter. More... | |
| Ipv4EndPoint * | m_endPoint |
| the IPv4 endpoint More... | |
| Ipv6EndPoint * | m_endPoint6 |
| the IPv6 endpoint More... | |
| enum SocketErrno | m_errno |
| Socket error code. More... | |
| TracedValue< SequenceNumber32 > | m_highRxAckMark |
| Highest ack received. More... | |
| TracedValue< SequenceNumber32 > | m_highRxMark |
| Highest seqno received. More... | |
| TracedValue< SequenceNumber32 > | m_highTxMark |
| Highest seqno ever sent, regardless of ReTx. More... | |
| RttHistory_t | m_history |
| List of sent packet. More... | |
| Callback< void, Ipv4Address, uint8_t, uint8_t, uint8_t, uint32_t > | m_icmpCallback |
| ICMP callback. More... | |
| Callback< void, Ipv6Address, uint8_t, uint8_t, uint8_t, uint32_t > | m_icmpCallback6 |
| ICMPv6 callback. More... | |
| uint32_t | m_initialCWnd |
| Initial cWnd value. More... | |
| uint32_t | m_initialSsThresh |
| Initial Slow Start Threshold value. More... | |
| EventId | m_lastAckEvent |
| Last ACK timeout event. More... | |
| TracedValue< Time > | m_lastRtt |
| Last RTT sample collected. More... | |
| uint16_t | m_maxWinSize |
| Maximum window size to advertise. More... | |
| Time | m_minRto |
| minimum value of the Retransmit timeout More... | |
| double | m_msl |
| Max segment lifetime. More... | |
| TracedValue< SequenceNumber32 > | m_nextTxSequence |
| Next seqnum to be sent (SND.NXT), ReTx pushes it back. More... | |
| Ptr< Node > | m_node |
| the associated node More... | |
| bool | m_noDelay |
| Set to true to disable Nagle's algorithm. More... | |
| EventId | m_persistEvent |
| Persist event: Send 1 byte to probe for a non-zero Rx window. More... | |
| Time | m_persistTimeout |
| Time between sending 1-byte probes. More... | |
| uint8_t | m_rcvScaleFactor |
| Received Window Scale (i.e., the one of the peer) More... | |
| EventId | m_retxEvent |
| Retransmission event. More... | |
| TracedValue< Time > | m_rto |
| Retransmit timeout. More... | |
| Ptr< RttEstimator > | m_rtt |
| Round trip time estimator. More... | |
| TracedValue< uint32_t > | m_rWnd |
| Receiver window (RCV.WND in RFC793) More... | |
| Ptr< TcpRxBuffer > | m_rxBuffer |
| Rx buffer (reordering buffer) More... | |
| uint32_t | m_segmentSize |
| Segment size. More... | |
| EventId | m_sendPendingDataEvent |
| micro-delay event to send pending data More... | |
| bool | m_shutdownRecv |
| Receive no longer allowed. More... | |
| bool | m_shutdownSend |
| Send no longer allowed. More... | |
| uint8_t | m_sndScaleFactor |
| Sent Window Scale (i.e., the one of the node) More... | |
| TracedValue< uint32_t > | m_ssThresh |
| Slow start threshold. More... | |
| TracedValue< TcpStates_t > | m_state |
| TCP state. More... | |
| Ptr< TcpL4Protocol > | m_tcp |
| the associated TCP L4 protocol More... | |
| bool | m_timestampEnabled |
| Timestamp option enabled. More... | |
| uint32_t | m_timestampToEcho |
| Timestamp to echo. More... | |
| EventId | m_timewaitEvent |
| TIME_WAIT expiration event: Move this socket to CLOSED state. More... | |
| Ptr< TcpTxBuffer > | m_txBuffer |
| Tx buffer. More... | |
| bool | m_winScalingEnabled |
| Window Scale option enabled. More... | |
| Protected Attributes inherited from ns3::Socket | |
| Ptr< NetDevice > | m_boundnetdevice |
| the device this socket is bound to (might be null). More... | |
| bool | m_recvPktInfo |
| if the socket should add packet info tags to the packet forwarded to L4. More... | |
Private Member Functions | |
| int | CountAck (const TcpHeader &tcpHeader) |
| Calculate the number of acknowledged packets upon the receipt of an ACK packet. More... | |
| void | EstimateBW (int acked, const TcpHeader &tcpHeader, Time rtt) |
| Estimate the network's bandwidth. More... | |
| void | Filtering (void) |
| Tustin filter. More... | |
| void | UpdateAckedSegments (int acked) |
| Update the total number of acknowledged packets during the current RTT. More... | |
Additional Inherited Members | |
| Static Public Attributes inherited from ns3::TcpSocket | |
| static const char *const | TcpStateName [TcpSocket::LAST_STATE] |
| Literal names of TCP states for use in log messages. More... | |
| Related Functions inherited from ns3::ObjectBase | |
| static TypeId | GetObjectIid (void) |
| Ensure the TypeId for ObjectBase gets fully configured to anchor the inheritance tree properly. More... | |
An implementation of a stream socket using TCP.
This class contains the implementation of TCP Westwood and Westwood+.
Westwood and Westwood+ employ the AIAD (Additive Increase/Adaptive Decrease) congestion control paradigm. When a congestion episode happens, instead of halving the cwnd, these protocols try to estimate the network's bandwidth and use the estimated value to adjust the cwnd. While Westwood performs the bandwidth sampling every ACK reception, Westwood+ samples the bandwidth every RTT.
The two main methods in the implementation are the CountAck (const TCPHeader&) and the EstimateBW (int, const, Time). The CountAck method calculates the number of acknowledged segments on the receipt of an ACK. The EstimateBW estimates the bandwidth based on the value returned by CountAck and the sampling interval (last ACK inter-arrival time for Westwood and last RTT for Westwood+).
ns3::TcpWestwood is accessible through the following paths with Config::Set and Config::Connect:
Size of this type is 896 bytes (on a 64-bit architecture).
Definition at line 62 of file tcp-westwood.h.
| ns3::TcpWestwood::TcpWestwood | ( | void | ) |
Definition at line 71 of file tcp-westwood.cc.
References NS_LOG_FUNCTION.
| ns3::TcpWestwood::TcpWestwood | ( | const TcpWestwood & | sock | ) |
Copy constructor.
| sock | the object to copy |
Definition at line 86 of file tcp-westwood.cc.
References m_minRtt, NS_LOG_FUNCTION, NS_LOG_INFO, and NS_LOG_LOGIC.
|
virtual |
Definition at line 105 of file tcp-westwood.cc.
|
private |
Calculate the number of acknowledged packets upon the receipt of an ACK packet.
| tcpHeader | the header of the received ACK packet |
Definition at line 202 of file tcp-westwood.cc.
References ns3::TcpHeader::GetAckNumber(), m_accountedFor, m_prevAckNo, ns3::TcpSocketBase::m_segmentSize, and NS_LOG_FUNCTION.
Referenced by ReceivedAck().
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protectedvirtual |
Received dupack (duplicate ACK)
| tcpHeader | the packet's TCP header |
| count | counter of duplicate ACKs |
Implements ns3::TcpSocketBase.
Definition at line 242 of file tcp-westwood.cc.
References ns3::TcpSocketBase::DoRetransmit(), ns3::Time::GetSeconds(), ns3::EventId::IsRunning(), ns3::TcpSocketBase::m_connected, m_currentBW, ns3::TcpSocketBase::m_cWnd, m_inFastRec, m_minRtt, ns3::TcpSocketBase::m_segmentSize, ns3::TcpSocketBase::m_sendPendingDataEvent, ns3::TcpSocketBase::m_ssThresh, NS_LOG_FUNCTION, NS_LOG_INFO, and ns3::TcpSocketBase::SendPendingData().
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| acked | the number of acknowledged packets returned by CountAck |
| tcpHeader | the header of the packet |
| rtt | the RTT estimation |
Definition at line 176 of file tcp-westwood.cc.
References Filtering(), ns3::Time::GetSeconds(), m_ackedSegments, m_currentBW, m_IsCount, m_lastAck, m_pType, ns3::TcpSocketBase::m_segmentSize, ns3::Simulator::Now(), NS_LOG_FUNCTION, WESTWOOD, and WESTWOODPLUS.
Referenced by EstimateRtt(), and ReceivedAck().
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protectedvirtual |
Estimate the RTT, record the minimum value, and run a clock on the RTT to trigger Westwood+ bandwidth sampling.
| header | the packet header |
Reimplemented from ns3::TcpSocketBase.
Definition at line 297 of file tcp-westwood.cc.
References ns3::EventId::Cancel(), ns3::TcpSocket::ESTABLISHED, EstimateBW(), ns3::TcpSocketBase::EstimateRtt(), m_ackedSegments, m_bwEstimateEvent, m_IsCount, ns3::TcpSocketBase::m_lastRtt, m_minRtt, m_pType, ns3::TcpSocketBase::m_state, NS_LOG_FUNCTION_NOARGS, ns3::Simulator::Schedule(), and WESTWOODPLUS.
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private |
Tustin filter.
Definition at line 331 of file tcp-westwood.cc.
References m_currentBW, m_fType, m_lastBW, m_lastSampleBW, NONE, NS_LOG_FUNCTION, and TUSTIN.
Referenced by EstimateBW().
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protectedvirtual |
Call CopyObject<> to clone me.
Implements ns3::TcpSocketBase.
Definition at line 110 of file tcp-westwood.cc.
References NS_LOG_FUNCTION.
|
static |
Get the type ID.
Definition at line 52 of file tcp-westwood.cc.
References m_currentBW, m_fType, m_pType, ns3::MakeEnumAccessor(), ns3::MakeEnumChecker(), ns3::MakeTraceSourceAccessor(), NONE, ns3::TypeId::SetParent(), TUSTIN, WESTWOOD, and WESTWOODPLUS.
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protectedvirtual |
Update buffers w.r.t.
ACK
| seq | the sequence number |
Reimplemented from ns3::TcpSocketBase.
Definition at line 117 of file tcp-westwood.cc.
References ns3::TracedValue< T >::Get(), ns3::TcpSocketBase::m_cWnd, m_inFastRec, ns3::TcpSocketBase::m_segmentSize, ns3::TcpSocketBase::m_ssThresh, ns3::TcpSocketBase::NewAck(), NS_LOG_FUNCTION, NS_LOG_INFO, and NS_LOG_LOGIC.
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protectedvirtual |
Process the newly received ACK.
| packet | the received ACK packet |
| tcpHeader | the header attached to the ACK packet |
Reimplemented from ns3::TcpSocketBase.
Definition at line 151 of file tcp-westwood.cc.
References ns3::TcpHeader::ACK, CountAck(), EstimateBW(), ns3::TcpHeader::GetAckNumber(), ns3::TcpHeader::GetFlags(), m_IsCount, m_prevAckNo, m_pType, NS_LOG_FUNCTION, ns3::TcpSocketBase::ReceivedAck(), UpdateAckedSegments(), WESTWOOD, and WESTWOODPLUS.
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protectedvirtual |
Halving cwnd and call DoRetransmit()
Reimplemented from ns3::TcpSocketBase.
Definition at line 270 of file tcp-westwood.cc.
References ns3::TcpSocket::CLOSED, ns3::TcpSocketBase::DoRetransmit(), ns3::TracedValue< T >::Get(), ns3::Time::GetSeconds(), m_currentBW, ns3::TcpSocketBase::m_cWnd, m_inFastRec, m_minRtt, ns3::TcpSocketBase::m_nextTxSequence, ns3::TcpSocketBase::m_segmentSize, ns3::TcpSocketBase::m_ssThresh, ns3::TcpSocketBase::m_state, ns3::TcpSocketBase::m_txBuffer, ns3::Simulator::Now(), NS_LOG_FUNCTION, NS_LOG_INFO, NS_LOG_LOGIC, and ns3::TcpSocket::TIME_WAIT.
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private |
Update the total number of acknowledged packets during the current RTT.
| acked | the number of packets the currently received ACK acknowledges |
Definition at line 236 of file tcp-westwood.cc.
References m_ackedSegments.
Referenced by ReceivedAck().
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protected |
The number of received DUPACKs.
Definition at line 157 of file tcp-westwood.h.
Referenced by CountAck().
|
protected |
The number of segments ACKed between RTTs.
Definition at line 161 of file tcp-westwood.h.
Referenced by EstimateBW(), EstimateRtt(), and UpdateAckedSegments().
|
protected |
The BW estimation event for Westwood+.
Definition at line 163 of file tcp-westwood.h.
Referenced by EstimateRtt().
|
protected |
Current value of the estimated BW.
Definition at line 151 of file tcp-westwood.h.
Referenced by DupAck(), EstimateBW(), Filtering(), GetTypeId(), and Retransmit().
|
protected |
0 for none, 1 for Tustin
Definition at line 159 of file tcp-westwood.h.
Referenced by Filtering(), and GetTypeId().
|
protected |
Currently in fast recovery if TRUE.
Definition at line 149 of file tcp-westwood.h.
Referenced by DupAck(), NewAck(), and Retransmit().
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protected |
Start keeping track of m_ackedSegments for Westwood+ if TRUE.
Definition at line 162 of file tcp-westwood.h.
Referenced by EstimateBW(), EstimateRtt(), and ReceivedAck().
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protected |
The time last ACK was received.
Definition at line 155 of file tcp-westwood.h.
Referenced by EstimateBW().
|
protected |
Last bandwidth sample after being filtered.
Definition at line 153 of file tcp-westwood.h.
Referenced by Filtering().
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protected |
|
protected |
Minimum RTT.
Definition at line 154 of file tcp-westwood.h.
Referenced by DupAck(), EstimateRtt(), Retransmit(), and TcpWestwood().
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protected |
Previously received ACK number.
Definition at line 156 of file tcp-westwood.h.
Referenced by CountAck(), and ReceivedAck().
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protected |
0 for Westwood, 1 for Westwood+
Definition at line 158 of file tcp-westwood.h.
Referenced by EstimateBW(), EstimateRtt(), GetTypeId(), and ReceivedAck().
1.8.9.1 
