Socket logic for the NSC TCP sockets. More...

#include <nsc-tcp-socket-impl.h>

Inheritance diagram for ns3::NscTcpSocketImpl:

Collaboration diagram for ns3::NscTcpSocketImpl:

Public Member Functions
	NscTcpSocketImpl ()
	NscTcpSocketImpl (const NscTcpSocketImpl &sock)
virtual	~NscTcpSocketImpl ()
virtual int	Bind (void)
	Allocate a local IPv4 endpoint for this socket.
virtual int	Bind (const Address &address)
	Allocate a local endpoint for this socket.
virtual int	Bind6 (void)
	Allocate a local IPv6 endpoint for this socket.
virtual int	Close (void)
	Close a socket.
virtual int	Connect (const Address &address)
	Initiate a connection to a remote host.
virtual bool	GetAllowBroadcast () const
	Query whether broadcast datagram transmissions are allowed.
virtual enum SocketErrno	GetErrno (void) const
virtual Ptr< Node >	GetNode (void) const
virtual uint32_t	GetRxAvailable (void) const
virtual enum SocketType	GetSocketType (void) const
virtual int	GetSockName (Address &address) const
virtual uint32_t	GetTxAvailable (void) const
	Returns the number of bytes which can be sent in a single call to Send.
virtual int	Listen (void)
	Listen for incoming connections.
virtual Ptr< Packet >	Recv (uint32_t maxSize, uint32_t flags)
	Read data from the socket.
virtual Ptr< Packet >	RecvFrom (uint32_t maxSize, uint32_t flags, Address &fromAddress)
	Read a single packet from the socket and retrieve the sender address.
virtual int	Send (Ptr< Packet > p, uint32_t flags)
	Send data (or dummy data) to the remote host.
virtual int	SendTo (Ptr< Packet > p, uint32_t flags, const Address &toAddress)
	Send data to a specified peer.
virtual bool	SetAllowBroadcast (bool allowBroadcast)
	Configure whether broadcast datagram transmissions are allowed.
void	SetNode (Ptr< Node > node)
void	SetTcp (Ptr< NscTcpL4Protocol > tcp)
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)
virtual void	BindToNetDevice (Ptr< NetDevice > netdevice)
	Bind a socket to specific device.
Ptr< NetDevice >	GetBoundNetDevice ()
	Returns socket's bound netdevice, if any.
uint8_t	GetIpTos (void) const
virtual uint8_t	GetIpTtl (void) const
virtual uint8_t	GetIpv6HopLimit (void) const
uint8_t	GetIpv6Tclass (void) const
bool	IsIpRecvTos (void) const
	Ask if the socket is currently passing information about IP Type of Service up the stack.
bool	IsIpRecvTtl (void) const
	Ask if the socket is currently passing information about IP_TTL up the stack.
bool	IsIpv6RecvHopLimit (void) const
	Ask if the socket is currently passing information about IPv6 Hop Limit up the stack.
bool	IsIpv6RecvTclass (void) const
	Ask if the socket is currently passing information about IPv6 Traffic Class up the stack.
bool	IsRecvPktInfo () const
	Get status indicating whether enable/disable packet information to socket.
Ptr< Packet >	Recv (void)
	Read a single packet from the socket.
int	Recv (uint8_t *buf, uint32_t size, uint32_t flags)
	Recv data (or dummy data) from the remote host.
Ptr< Packet >	RecvFrom (Address &fromAddress)
	Read a single packet from the socket and retrieve the sender address.
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.
int	Send (Ptr< Packet > p)
	Send data (or dummy data) to the remote host.
int	Send (const uint8_t *buf, uint32_t size, uint32_t flags)
	Send data (or dummy data) to the remote host.
int	SendTo (const uint8_t *buf, uint32_t size, uint32_t flags, const Address &address)
	Send data to a specified peer.
void	SetAcceptCallback (Callback< bool, Ptr< Socket >, const Address & > connectionRequest, Callback< void, Ptr< Socket >, const Address & > newConnectionCreated)
	Accept connection requests from remote hosts.
void	SetCloseCallbacks (Callback< void, Ptr< Socket > > normalClose, Callback< void, Ptr< Socket > > errorClose)
	Detect socket recv() events such as graceful shutdown or error.
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.
void	SetDataSentCallback (Callback< void, Ptr< Socket >, uint32_t > dataSent)
	Notify application when a packet has been sent from transport protocol (non-standard socket call)
void	SetIpRecvTos (bool ipv4RecvTos)
	Tells a socket to pass information about IP Type of Service up the stack.
void	SetIpRecvTtl (bool ipv4RecvTtl)
	Tells a socket to pass information about IP_TTL up the stack.
void	SetIpTos (uint8_t ipTos)
virtual void	SetIpTtl (uint8_t ipTtl)
virtual void	SetIpv6HopLimit (uint8_t ipHopLimit)
void	SetIpv6RecvHopLimit (bool ipv6RecvHopLimit)
	Tells a socket to pass information about IPv6 Hop Limit up the stack.
void	SetIpv6RecvTclass (bool ipv6RecvTclass)
	Tells a socket to pass information about IPv6 Traffic Class up the stack.
void	SetIpv6Tclass (int ipTclass)
void	SetRecvCallback (Callback< void, Ptr< Socket > >)
	Notify application when new data is available to be read.
void	SetRecvPktInfo (bool flag)
	Enable/Disable receive packet information to socket.
void	SetSendCallback (Callback< void, Ptr< Socket >, uint32_t > sendCb)
	Notify application when space in transmit buffer is added.
Public Member Functions inherited from ns3::Object
	Object ()
virtual	~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 ()
	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
virtual	~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)

Private Member Functions
bool	Accept (void)
void	CompleteFork (void)
void	ConnectionSucceeded ()
Ptr< NscTcpSocketImpl >	Copy ()
void	Destroy (void)
int	FinishBind (void)
void	ForwardUp (Ptr< Packet > p, Ipv4Header header, uint16_t port, Ptr< Ipv4Interface > incomingInterface)
virtual uint32_t	GetAdvWin (void) const
virtual uint32_t	GetConnCount (void) const
virtual Time	GetConnTimeout (void) const
virtual uint32_t	GetDelAckMaxCount (void) const
virtual Time	GetDelAckTimeout (void) const
virtual uint32_t	GetInitialCwnd (void) const
enum Socket::SocketErrno	GetNativeNs3Errno (int err) const
virtual Time	GetPersistTimeout (void) const
virtual uint32_t	GetRcvBufSize (void) const
virtual uint32_t	GetSegSize (void) const
virtual uint32_t	GetSndBufSize (void) const
virtual uint32_t	GetSSThresh (void) const
virtual bool	GetTcpNoDelay (void) const
void	NSCWakeup (void)
bool	ReadPendingData (void)
bool	SendPendingData (void)
virtual void	SetAdvWin (uint32_t window)
virtual void	SetConnCount (uint32_t count)
virtual void	SetConnTimeout (Time timeout)
virtual void	SetDelAckMaxCount (uint32_t count)
virtual void	SetDelAckTimeout (Time timeout)
virtual void	SetInitialCwnd (uint32_t cwnd)
virtual void	SetPersistTimeout (Time timeout)
virtual void	SetRcvBufSize (uint32_t size)
virtual void	SetSegSize (uint32_t size)
virtual void	SetSndBufSize (uint32_t size)
virtual void	SetSSThresh (uint32_t threshold)
virtual void	SetTcpNoDelay (bool noDelay)

Private Attributes
uint32_t	m_advertisedWindowSize
bool	m_closeOnEmpty
uint32_t	m_cnCount
Time	m_cnTimeout
bool	m_connected
TracedValue< uint32_t >	m_cWnd
uint32_t	m_delAckMaxCount
Time	m_delAckTimeout
std::queue< Ptr< Packet > >	m_deliveryQueue
Ipv4EndPoint *	m_endPoint
enum SocketErrno	m_errno
uint32_t	m_initialCWnd
Time	m_lastMeasuredRtt
Ipv4Address	m_localAddress
uint16_t	m_localPort
Ptr< Node >	m_node
bool	m_noDelay
INetStreamSocket *	m_nscTcpSocket
InetSocketAddress	m_peerAddress
Time	m_persistTimeout
uint32_t	m_rcvBufSize
Ipv4Address	m_remoteAddress
uint16_t	m_remotePort
uint32_t	m_rxAvailable
uint32_t	m_rxWindowSize
uint32_t	m_segmentSize
bool	m_shutdownRecv
bool	m_shutdownSend
uint32_t	m_sndBufSize
uint32_t	m_ssThresh
TracedValue< TcpStates_t >	m_state
Ptr< NscTcpL4Protocol >	m_tcp
std::queue< Ptr< Packet > >	m_txBuffer
uint32_t	m_txBufferSize

Friends
class	Tcp

Additional Inherited Members
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 }
enum	SocketType { NS3_SOCK_STREAM, NS3_SOCK_SEQPACKET, NS3_SOCK_DGRAM, NS3_SOCK_RAW }
Static Public Attributes inherited from ns3::TcpSocket
static const char *const	TcpStateName [LAST_STATE] = { "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD", "ESTABLISHED", "CLOSE_WAIT", "LAST_ACK", "FIN_WAIT_1", "FIN_WAIT_2", "CLOSING", "TIME_WAIT" }
Protected Member Functions inherited from ns3::Socket
virtual void	DoDispose (void)
bool	IsManualIpTos (void) const
bool	IsManualIpTtl (void) const
bool	IsManualIpv6HopLimit (void) const
bool	IsManualIpv6Tclass (void) const
void	NotifyConnectionFailed (void)
bool	NotifyConnectionRequest (const Address &from)
void	NotifyConnectionSucceeded (void)
void	NotifyDataRecv (void)
void	NotifyDataSent (uint32_t size)
void	NotifyErrorClose (void)
void	NotifyNewConnectionCreated (Ptr< Socket > socket, const Address &from)
void	NotifyNormalClose (void)
void	NotifySend (uint32_t spaceAvailable)
Protected Attributes inherited from ns3::Socket
Ptr< NetDevice >	m_boundnetdevice
bool	m_recvPktInfo

Detailed Description

Socket logic for the NSC TCP sockets.

Most of the TCP internal logic is handled by the NSC tcp library itself; this class maps ns3::Socket calls to the NSC TCP library.

Definition at line 53 of file nsc-tcp-socket-impl.h.

Constructor & Destructor Documentation

ns3::NscTcpSocketImpl::NscTcpSocketImpl ( )

Create an unbound tcp socket.

Definition at line 64 of file nsc-tcp-socket-impl.cc.

References NS_LOG_FUNCTION.

ns3::NscTcpSocketImpl::NscTcpSocketImpl ( const NscTcpSocketImpl & sock )

Definition at line 83 of file nsc-tcp-socket-impl.cc.

References m_txBuffer, NS_LOG_FUNCTION_NOARGS, and NS_LOG_LOGIC.

ns3::NscTcpSocketImpl::~NscTcpSocketImpl ( )

virtual

Note that this piece of code is a bit tricky: when DeAllocate is called, it will call into Ipv4EndPointDemux::Deallocate which triggers a delete of the associated endPoint which triggers in turn a call to the method NscTcpSocketImpl::Destroy below will will zero the m_endPoint field.

Definition at line 127 of file nsc-tcp-socket-impl.cc.

References ns3::NscTcpL4Protocol::DeAllocate(), m_endPoint, m_node, m_tcp, NS_ASSERT, and NS_LOG_FUNCTION.

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Member Function Documentation

bool ns3::NscTcpSocketImpl::Accept ( void )

private

Definition at line 542 of file nsc-tcp-socket-impl.cc.

References INetStreamSocket::accept(), ns3::CLOSED, CompleteFork(), Copy(), INetStreamSocket::is_listening(), ns3::LISTEN, m_nscTcpSocket, m_state, NS_ASSERT, NS_LOG_LOGIC, and ns3::Simulator::ScheduleNow().

Referenced by NSCWakeup().

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int ns3::NscTcpSocketImpl::Bind ( void )

virtual

Allocate a local IPv4 endpoint for this socket.

Returns: 0 on success, -1 on failure.

Implements ns3::Socket.

Definition at line 210 of file nsc-tcp-socket-impl.cc.

References ns3::NscTcpL4Protocol::Allocate(), FinishBind(), m_endPoint, m_tcp, and NS_LOG_FUNCTION_NOARGS.

Referenced by Connect().

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int ns3::NscTcpSocketImpl::Bind ( const Address & address )

virtual

Allocate a local endpoint for this socket.

Parameters

address the address to try to allocate

Returns: 0 on success, -1 on failure.

Implements ns3::Socket.

Definition at line 224 of file nsc-tcp-socket-impl.cc.

References ns3::NscTcpL4Protocol::Allocate(), ns3::InetSocketAddress::ConvertFrom(), ns3::Socket::ERROR_INVAL, FinishBind(), ns3::Ipv4Address::GetAny(), ns3::InetSocketAddress::GetIpv4(), ns3::InetSocketAddress::GetPort(), ns3::InetSocketAddress::IsMatchingType(), m_endPoint, m_localPort, m_tcp, NS_LOG_FUNCTION, NS_LOG_LOGIC, and port.

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int ns3::NscTcpSocketImpl::Bind6 ( void )

virtual

Allocate a local IPv6 endpoint for this socket.

Returns: 0 on success, -1 on failure.

Implements ns3::Socket.

Definition at line 217 of file nsc-tcp-socket-impl.cc.

References ns3::Socket::ERROR_AFNOSUPPORT, m_errno, and NS_LOG_LOGIC.

int ns3::NscTcpSocketImpl::Close ( void )

virtual

Close a socket.

Returns: zero on success, -1 on failure.

After the Close call, the socket is no longer valid, and cannot safely be used for subsequent operations.

Implements ns3::Socket.

Definition at line 275 of file nsc-tcp-socket-impl.cc.

References ns3::CLOSED, INetStreamSocket::disconnect(), m_closeOnEmpty, m_nscTcpSocket, m_state, m_txBuffer, NS_LOG_FUNCTION, NS_LOG_LOGIC, and ShutdownSend().

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void ns3::NscTcpSocketImpl::CompleteFork ( void )

private

Definition at line 487 of file nsc-tcp-socket-impl.cc.

References ns3::NscTcpL4Protocol::Allocate(), ns3::Ipv4Address::Deserialize(), Destroy(), ns3::ESTABLISHED, ForwardUp(), INetStreamSocket::getpeername(), INetStreamSocket::getsockname(), ns3::LISTEN, m_endPoint, m_localAddress, m_localPort, m_nscTcpSocket, m_peerAddress, m_remoteAddress, m_remotePort, m_state, m_tcp, ns3::MakeCallback(), ns3::Socket::NotifyNewConnectionCreated(), NS_ASSERT, NS_LOG_LOGIC, ns3::Ipv4EndPoint::SetDestroyCallback(), and ns3::Ipv4EndPoint::SetRxCallback().

Referenced by Accept().

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int ns3::NscTcpSocketImpl::Connect ( const Address & address )

virtual

Initiate a connection to a remote host.

Parameters

address Address of remote.

Implements ns3::Socket.

Definition at line 299 of file nsc-tcp-socket-impl.cc.

References Bind(), INetStreamSocket::connect(), ns3::InetSocketAddress::ConvertFrom(), ns3::InetSocketAddress::GetIpv4(), ns3::InetSocketAddress::GetPort(), m_endPoint, m_nscTcpSocket, m_remoteAddress, m_remotePort, m_state, NS_ASSERT, NS_LOG_FUNCTION, ns3::Ipv4Address::Print(), and ns3::SYN_SENT.

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void ns3::NscTcpSocketImpl::ConnectionSucceeded ( )

private

Definition at line 524 of file nsc-tcp-socket-impl.cc.

References ns3::Ipv4Address::Deserialize(), INetStreamSocket::getsockname(), m_localAddress, m_localPort, m_nscTcpSocket, m_remoteAddress, m_remotePort, ns3::Socket::NotifyConnectionSucceeded(), and NS_LOG_LOGIC.

Referenced by NSCWakeup().

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Ptr< NscTcpSocketImpl > ns3::NscTcpSocketImpl::Copy ( void )

private

Definition at line 679 of file nsc-tcp-socket-impl.cc.

Referenced by Accept().

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void ns3::NscTcpSocketImpl::Destroy ( void )

private

Definition at line 187 of file nsc-tcp-socket-impl.cc.

References m_endPoint, m_node, m_tcp, and NS_LOG_FUNCTION_NOARGS.

Referenced by CompleteFork(), and FinishBind().

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int ns3::NscTcpSocketImpl::FinishBind ( void )

private

Definition at line 195 of file nsc-tcp-socket-impl.cc.

References Destroy(), ForwardUp(), ns3::Ipv4EndPoint::GetLocalAddress(), ns3::Ipv4EndPoint::GetLocalPort(), m_endPoint, m_localAddress, m_localPort, ns3::MakeCallback(), NS_LOG_FUNCTION_NOARGS, ns3::Ipv4EndPoint::SetDestroyCallback(), and ns3::Ipv4EndPoint::SetRxCallback().

Referenced by Bind().

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void ns3::NscTcpSocketImpl::ForwardUp	(	Ptr< Packet >	p,
		Ipv4Header	header,
		uint16_t	port,
		Ptr< Ipv4Interface >	incomingInterface
	)

private

Definition at line 481 of file nsc-tcp-socket-impl.cc.

References NSCWakeup().

Referenced by CompleteFork(), and FinishBind().

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uint32_t ns3::NscTcpSocketImpl::GetAdvWin ( void ) const

privatevirtual

Definition at line 727 of file nsc-tcp-socket-impl.cc.

References m_advertisedWindowSize.

bool ns3::NscTcpSocketImpl::GetAllowBroadcast ( ) const

virtual

Query whether broadcast datagram transmissions are allowed.

This method corresponds to using getsockopt() SO_BROADCAST of real network or BSD sockets.

Returns: true if broadcast is allowed, false otherwise

Implements ns3::Socket.

Definition at line 874 of file nsc-tcp-socket-impl.cc.

uint32_t ns3::NscTcpSocketImpl::GetConnCount ( void ) const

privatevirtual

Definition at line 775 of file nsc-tcp-socket-impl.cc.

References m_cnCount.

Time ns3::NscTcpSocketImpl::GetConnTimeout ( void ) const

privatevirtual

Definition at line 763 of file nsc-tcp-socket-impl.cc.

References m_cnTimeout.

uint32_t ns3::NscTcpSocketImpl::GetDelAckMaxCount ( void ) const

privatevirtual

Definition at line 799 of file nsc-tcp-socket-impl.cc.

References m_delAckMaxCount.

Time ns3::NscTcpSocketImpl::GetDelAckTimeout ( void ) const

privatevirtual

Definition at line 787 of file nsc-tcp-socket-impl.cc.

References m_delAckTimeout.

enum Socket::SocketErrno ns3::NscTcpSocketImpl::GetErrno ( void ) const

virtual

Returns: the errno associated to the last call which failed in this socket. Each socket's errno is initialized to zero when the socket is created.

Implements ns3::Socket.

Definition at line 167 of file nsc-tcp-socket-impl.cc.

References m_errno, and NS_LOG_FUNCTION_NOARGS.

uint32_t ns3::NscTcpSocketImpl::GetInitialCwnd ( void ) const

privatevirtual

Definition at line 751 of file nsc-tcp-socket-impl.cc.

References m_initialCWnd.

enum Socket::SocketErrno ns3::NscTcpSocketImpl::GetNativeNs3Errno ( int err ) const

private

Definition at line 829 of file nsc-tcp-socket-impl.cc.

Referenced by ReadPendingData().

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Ptr< Node > ns3::NscTcpSocketImpl::GetNode ( void ) const

virtual

Returns: the node this socket is associated with.

Implements ns3::Socket.

Definition at line 180 of file nsc-tcp-socket-impl.cc.

References m_node, and NS_LOG_FUNCTION_NOARGS.

Time ns3::NscTcpSocketImpl::GetPersistTimeout ( void ) const

privatevirtual

Definition at line 823 of file nsc-tcp-socket-impl.cc.

References m_persistTimeout.

uint32_t ns3::NscTcpSocketImpl::GetRcvBufSize ( void ) const

privatevirtual

Definition at line 703 of file nsc-tcp-socket-impl.cc.

References m_rcvBufSize.

uint32_t ns3::NscTcpSocketImpl::GetRxAvailable ( void ) const

virtual

Return number of bytes which can be returned from one or multiple calls to Recv. Must be possible to call this method from the Recv callback.

Implements ns3::Socket.

Definition at line 472 of file nsc-tcp-socket-impl.cc.

References m_rxAvailable, and NS_LOG_FUNCTION_NOARGS.

uint32_t ns3::NscTcpSocketImpl::GetSegSize ( void ) const

privatevirtual

Definition at line 715 of file nsc-tcp-socket-impl.cc.

References m_segmentSize.

uint32_t ns3::NscTcpSocketImpl::GetSndBufSize ( void ) const

privatevirtual

Definition at line 691 of file nsc-tcp-socket-impl.cc.

References m_sndBufSize.

enum Socket::SocketType ns3::NscTcpSocketImpl::GetSocketType ( void ) const

virtual

Returns: the socket type, analogous to getsockopt (SO_TYPE)

Implements ns3::Socket.

Definition at line 174 of file nsc-tcp-socket-impl.cc.

References ns3::Socket::NS3_SOCK_STREAM.

int ns3::NscTcpSocketImpl::GetSockName ( Address & address ) const

virtual

Parameters

address the address name this socket is associated with.

Returns: 0 if success, -1 otherwise

Implements ns3::Socket.

Definition at line 464 of file nsc-tcp-socket-impl.cc.

References m_localAddress, m_localPort, and NS_LOG_FUNCTION_NOARGS.

uint32_t ns3::NscTcpSocketImpl::GetSSThresh ( void ) const

privatevirtual

Definition at line 739 of file nsc-tcp-socket-impl.cc.

References m_ssThresh.

bool ns3::NscTcpSocketImpl::GetTcpNoDelay ( void ) const

privatevirtual

Definition at line 811 of file nsc-tcp-socket-impl.cc.

References m_noDelay.

uint32_t ns3::NscTcpSocketImpl::GetTxAvailable ( void ) const

virtual

Returns the number of bytes which can be sent in a single call to Send.

For datagram sockets, this returns the number of bytes that can be passed atomically through the underlying protocol.

For stream sockets, this returns the available space in bytes left in the transmit buffer.

Implements ns3::Socket.

Definition at line 375 of file nsc-tcp-socket-impl.cc.

References m_sndBufSize, m_txBufferSize, NS_ASSERT, and NS_LOG_FUNCTION_NOARGS.

Referenced by Send().

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TypeId ns3::NscTcpSocketImpl::GetTypeId ( void )

static

Reimplemented from ns3::TcpSocket.

Definition at line 53 of file nsc-tcp-socket-impl.cc.

References m_cWnd, ns3::MakeTraceSourceAccessor(), and ns3::TypeId::SetParent().

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int ns3::NscTcpSocketImpl::Listen ( void )

virtual

Listen for incoming connections.

Returns: 0 on success, -1 on error (in which case errno is set).

Implements ns3::Socket.

Definition at line 390 of file nsc-tcp-socket-impl.cc.

References ns3::LISTEN, INetStreamSocket::listen(), m_localPort, m_nscTcpSocket, m_state, and NS_LOG_FUNCTION.

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void ns3::NscTcpSocketImpl::NSCWakeup ( void )

private

Definition at line 400 of file nsc-tcp-socket-impl.cc.

References Accept(), ns3::CLOSED, ConnectionSucceeded(), ns3::ESTABLISHED, INetStreamSocket::is_connected(), ns3::LISTEN, m_nscTcpSocket, m_state, m_txBuffer, NS_LOG_DEBUG, ReadPendingData(), ns3::Simulator::ScheduleNow(), SendPendingData(), and ns3::SYN_SENT.

Referenced by ForwardUp().

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bool ns3::NscTcpSocketImpl::ReadPendingData ( void )

private

Definition at line 575 of file nsc-tcp-socket-impl.cc.

References ns3::Packet::AddPacketTag(), ns3::CLOSE_WAIT, ns3::CLOSED, ns3::Socket::ERROR_AGAIN, ns3::Socket::ERROR_NOTERROR, ns3::ESTABLISHED, GetNativeNs3Errno(), ns3::Packet::GetSize(), m_deliveryQueue, m_errno, m_nscTcpSocket, m_peerAddress, m_rxAvailable, m_state, ns3::Socket::NotifyDataRecv(), NS_LOG_LOGIC, NS_LOG_WARN, INetStreamSocket::read_data(), and ns3::SocketAddressTag::SetAddress().

Referenced by NSCWakeup().

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Ptr< Packet > ns3::NscTcpSocketImpl::Recv	(	uint32_t	maxSize,
		uint32_t	flags
	)

virtual

Read data from the socket.

This function matches closely in semantics to the recv() function call in the standard C library (libc): ssize_t recv (int s, void *buf, size_t len, int flags); except that the receive I/O is asynchronous. This is the primary Recv method at this low-level API and must be implemented by subclasses.

This method is normally used only on a connected socket. In a typical blocking sockets model, this call would block until at least one byte is returned or the connection closes. In ns-3 at this API, the call returns immediately in such a case and returns 0 if nothing is available to be read. However, an application can set a callback, ns3::SetRecvCallback, to be notified of data being available to be read (when it conceptually unblocks); this is an asynchronous I/O model for recv().

This variant of Recv() uses class ns3::Packet to encapsulate data, rather than providing a raw pointer and length field. This allows an ns-3 application to attach tags if desired (such as a flow ID) and may allow the simulator to avoid some data copies. Despite the appearance of receiving Packets on a stream socket, just think of it as a fancy byte buffer with streaming semantics.

The semantics depend on the type of socket. For a datagram socket, each Recv() returns the data from at most one Send(), and order is not necessarily preserved. For a stream socket, the bytes are delivered in order, and on-the-wire packet boundaries are not preserved.

The flags argument is formed by or'ing one or more of the values: MSG_OOB process out-of-band data MSG_PEEK peek at incoming message None of these flags are supported for now.

Some variants of Recv() are supported as additional API, including RecvFrom(), overloaded Recv() without arguments, and variants that use raw character buffers.

Parameters

maxSize	reader will accept packet up to maxSize
flags	Socket control flags

Returns: Ptr<Packet> of the next in-sequence packet. Returns 0 if the socket cannot return a next in-sequence packet conforming to the maxSize and flags.

See Also: SetRecvCallback

Implements ns3::Socket.

Definition at line 424 of file nsc-tcp-socket-impl.cc.

References ns3::Socket::ERROR_AGAIN, ns3::Packet::GetSize(), m_deliveryQueue, m_errno, m_rxAvailable, and NS_LOG_FUNCTION_NOARGS.

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Ptr< Packet > ns3::NscTcpSocketImpl::RecvFrom	(	uint32_t	maxSize,
		uint32_t	flags,
		Address &	fromAddress
	)

virtual

Read a single packet from the socket and retrieve the sender address.

Calls Recv(maxSize, flags) with maxSize implicitly set to maximum sized integer, and flags set to zero.

This method has similar semantics to Recv () but subclasses may want to provide checks on socket state, so the implementation is pushed to subclasses.

Parameters

maxSize	reader will accept packet up to maxSize
flags	Socket control flags
fromAddress	output parameter that will return the address of the sender of the received packet, if any. Remains untouched if no packet is received.

Returns: Ptr<Packet> of the next in-sequence packet. Returns 0 if the socket cannot return a next in-sequence packet.

Implements ns3::Socket.

Definition at line 447 of file nsc-tcp-socket-impl.cc.

References ns3::SocketAddressTag::GetAddress(), NS_ASSERT, NS_LOG_FUNCTION, ns3::Packet::PeekPacketTag(), and ns3::Socket::Recv().

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int ns3::NscTcpSocketImpl::Send	(	Ptr< Packet >	p,
		uint32_t	flags
	)

virtual

Send data (or dummy data) to the remote host.

This function matches closely in semantics to the send() function call in the standard C library (libc): ssize_t send (int s, const void *msg, size_t len, int flags); except that the send I/O is asynchronous. This is the primary Send method at this low-level API and must be implemented by subclasses.

In a typical blocking sockets model, this call would block upon lack of space to hold the message to be sent. In ns-3 at this API, the call returns immediately in such a case, but the callback registered with SetSendCallback() is invoked when the socket has space (when it conceptually unblocks); this is an asynchronous I/O model for send().

This variant of Send() uses class ns3::Packet to encapsulate data, rather than providing a raw pointer and length field. This allows an ns-3 application to attach tags if desired (such as a flow ID) and may allow the simulator to avoid some data copies. Despite the appearance of sending Packets on a stream socket, just think of it as a fancy byte buffer with streaming semantics.

If either the message buffer within the Packet is too long to pass atomically through the underlying protocol (for datagram sockets), or the message buffer cannot entirely fit in the transmit buffer (for stream sockets), -1 is returned and SocketErrno is set to ERROR_MSGSIZE. If the packet does not fit, the caller can split the Packet (based on information obtained from GetTxAvailable) and reattempt to send the data.

The flags argument is formed by or'ing one or more of the values: MSG_OOB process out-of-band data MSG_DONTROUTE bypass routing, use direct interface These flags are unsupported as of ns-3.1.

Parameters

p	ns3::Packet to send
flags	Socket control flags

Returns: the number of bytes accepted for transmission if no error occurs, and -1 otherwise.

See Also: SetSendCallback

Implements ns3::Socket.

Definition at line 325 of file nsc-tcp-socket-impl.cc.

References ns3::CLOSE_WAIT, ns3::Socket::ERROR_MSGSIZE, ns3::Socket::ERROR_NOTCONN, ns3::ESTABLISHED, ns3::Packet::GetSize(), GetTxAvailable(), m_errno, m_state, m_txBuffer, m_txBufferSize, NS_ASSERT, NS_LOG_FUNCTION, SendPendingData(), and ns3::SYN_SENT.

Referenced by SendTo().

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bool ns3::NscTcpSocketImpl::SendPendingData ( void )

private

Definition at line 617 of file nsc-tcp-socket-impl.cc.

References ns3::CLOSED, INetStreamSocket::disconnect(), ns3::Socket::ERROR_NOTERROR, m_closeOnEmpty, m_errno, m_nscTcpSocket, m_state, m_txBuffer, m_txBufferSize, ns3::Socket::NotifyDataSent(), NS_ASSERT, NS_LOG_FUNCTION, NS_LOG_LOGIC, ns3::Simulator::ScheduleNow(), and INetStreamSocket::send_data().

Referenced by NSCWakeup(), and Send().

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int ns3::NscTcpSocketImpl::SendTo	(	Ptr< Packet >	p,
		uint32_t	flags,
		const Address &	toAddress
	)

virtual

Send data to a specified peer.

This method has similar semantics to Send () but subclasses may want to provide checks on socket state, so the implementation is pushed to subclasses.

Parameters

p	packet to send
flags	Socket control flags
toAddress	IP Address of remote host

Returns: -1 in case of error or the number of bytes copied in the internal buffer and accepted for transmission.

Implements ns3::Socket.

Definition at line 360 of file nsc-tcp-socket-impl.cc.

References ns3::Socket::ERROR_NOTCONN, m_connected, m_errno, NS_LOG_FUNCTION, and Send().

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void ns3::NscTcpSocketImpl::SetAdvWin ( uint32_t window )

privatevirtual

Definition at line 721 of file nsc-tcp-socket-impl.cc.

References m_advertisedWindowSize.

bool ns3::NscTcpSocketImpl::SetAllowBroadcast ( bool allowBroadcast )

virtual

Configure whether broadcast datagram transmissions are allowed.

This method corresponds to using setsockopt() SO_BROADCAST of real network or BSD sockets. If set on a socket, this option will enable or disable packets to be transmitted to broadcast destination addresses.

Parameters

allowBroadcast Whether broadcast is allowed

Returns: true if operation succeeds

Implements ns3::Socket.

Definition at line 864 of file nsc-tcp-socket-impl.cc.

void ns3::NscTcpSocketImpl::SetConnCount ( uint32_t count )

privatevirtual

Definition at line 769 of file nsc-tcp-socket-impl.cc.

References m_cnCount.

void ns3::NscTcpSocketImpl::SetConnTimeout ( Time timeout )

privatevirtual

Definition at line 757 of file nsc-tcp-socket-impl.cc.

References m_cnTimeout, and timeout.

void ns3::NscTcpSocketImpl::SetDelAckMaxCount ( uint32_t count )

privatevirtual

Definition at line 793 of file nsc-tcp-socket-impl.cc.

References m_delAckMaxCount.

void ns3::NscTcpSocketImpl::SetDelAckTimeout ( Time timeout )

privatevirtual

Definition at line 781 of file nsc-tcp-socket-impl.cc.

References m_delAckTimeout, and timeout.

void ns3::NscTcpSocketImpl::SetInitialCwnd ( uint32_t cwnd )

privatevirtual

Definition at line 745 of file nsc-tcp-socket-impl.cc.

References m_initialCWnd.

void ns3::NscTcpSocketImpl::SetNode ( Ptr< Node > node )

Definition at line 150 of file nsc-tcp-socket-impl.cc.

References m_advertisedWindowSize, m_cWnd, m_initialCWnd, m_node, m_rxWindowSize, and m_segmentSize.

Referenced by ns3::NscTcpL4Protocol::CreateSocket().

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void ns3::NscTcpSocketImpl::SetPersistTimeout ( Time timeout )

privatevirtual

Definition at line 817 of file nsc-tcp-socket-impl.cc.

References m_persistTimeout, and timeout.

void ns3::NscTcpSocketImpl::SetRcvBufSize ( uint32_t size )

privatevirtual

Definition at line 697 of file nsc-tcp-socket-impl.cc.

References m_rcvBufSize.

void ns3::NscTcpSocketImpl::SetSegSize ( uint32_t size )

privatevirtual

Definition at line 709 of file nsc-tcp-socket-impl.cc.

References m_segmentSize.

void ns3::NscTcpSocketImpl::SetSndBufSize ( uint32_t size )

privatevirtual

Definition at line 685 of file nsc-tcp-socket-impl.cc.

References m_sndBufSize.

void ns3::NscTcpSocketImpl::SetSSThresh ( uint32_t threshold )

privatevirtual

Definition at line 733 of file nsc-tcp-socket-impl.cc.

References m_ssThresh.

void ns3::NscTcpSocketImpl::SetTcp ( Ptr< NscTcpL4Protocol > tcp )

Definition at line 159 of file nsc-tcp-socket-impl.cc.

References ns3::NscTcpL4Protocol::m_nscStack, m_nscTcpSocket, m_tcp, and INetStack::new_tcp_socket().

Referenced by ns3::NscTcpL4Protocol::CreateSocket().

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void ns3::NscTcpSocketImpl::SetTcpNoDelay ( bool noDelay )

privatevirtual

Definition at line 805 of file nsc-tcp-socket-impl.cc.

References m_noDelay.

int ns3::NscTcpSocketImpl::ShutdownRecv ( void )

virtual

Returns: zero on success, -1 on failure.

Do not allow any further Recv calls. This method is typically implemented for Tcp sockets by a half close.

Implements ns3::Socket.

Definition at line 267 of file nsc-tcp-socket-impl.cc.

References m_shutdownRecv, and NS_LOG_FUNCTION_NOARGS.

int ns3::NscTcpSocketImpl::ShutdownSend ( void )

virtual

Returns: zero on success, -1 on failure.

Do not allow any further Send calls. This method is typically implemented for Tcp sockets by a half close.

Implements ns3::Socket.

Definition at line 260 of file nsc-tcp-socket-impl.cc.

References m_shutdownSend, and NS_LOG_FUNCTION_NOARGS.

Referenced by Close().

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Friends And Related Function Documentation

friend class Tcp

friend

Definition at line 91 of file nsc-tcp-socket-impl.h.

Member Data Documentation

uint32_t ns3::NscTcpSocketImpl::m_advertisedWindowSize

private

Definition at line 164 of file nsc-tcp-socket-impl.h.

Referenced by GetAdvWin(), SetAdvWin(), and SetNode().

bool ns3::NscTcpSocketImpl::m_closeOnEmpty

private

Definition at line 155 of file nsc-tcp-socket-impl.h.

Referenced by Close(), and SendPendingData().

uint32_t ns3::NscTcpSocketImpl::m_cnCount

private

Definition at line 174 of file nsc-tcp-socket-impl.h.

Referenced by GetConnCount(), and SetConnCount().

Time ns3::NscTcpSocketImpl::m_cnTimeout

private

Definition at line 173 of file nsc-tcp-socket-impl.h.

Referenced by GetConnTimeout(), and SetConnTimeout().

bool ns3::NscTcpSocketImpl::m_connected

private

Definition at line 151 of file nsc-tcp-socket-impl.h.

Referenced by SendTo().

TracedValue<uint32_t> ns3::NscTcpSocketImpl::m_cWnd

private

Definition at line 165 of file nsc-tcp-socket-impl.h.

Referenced by GetTypeId(), and SetNode().

uint32_t ns3::NscTcpSocketImpl::m_delAckMaxCount

private

Definition at line 135 of file nsc-tcp-socket-impl.h.

Referenced by GetDelAckMaxCount(), and SetDelAckMaxCount().

Time ns3::NscTcpSocketImpl::m_delAckTimeout

private

Definition at line 136 of file nsc-tcp-socket-impl.h.

Referenced by GetDelAckTimeout(), and SetDelAckTimeout().

std::queue<Ptr<Packet> > ns3::NscTcpSocketImpl::m_deliveryQueue

private

Definition at line 178 of file nsc-tcp-socket-impl.h.

Referenced by ReadPendingData(), and Recv().

Ipv4EndPoint* ns3::NscTcpSocketImpl::m_endPoint

private

Definition at line 139 of file nsc-tcp-socket-impl.h.

Referenced by Bind(), CompleteFork(), Connect(), Destroy(), FinishBind(), and ~NscTcpSocketImpl().

enum SocketErrno ns3::NscTcpSocketImpl::m_errno

private

Definition at line 148 of file nsc-tcp-socket-impl.h.

Referenced by Bind6(), GetErrno(), ReadPendingData(), Recv(), Send(), SendPendingData(), and SendTo().

uint32_t ns3::NscTcpSocketImpl::m_initialCWnd

private

Definition at line 167 of file nsc-tcp-socket-impl.h.

Referenced by GetInitialCwnd(), SetInitialCwnd(), and SetNode().

Time ns3::NscTcpSocketImpl::m_lastMeasuredRtt

private

Definition at line 170 of file nsc-tcp-socket-impl.h.

Ipv4Address ns3::NscTcpSocketImpl::m_localAddress

private

Definition at line 145 of file nsc-tcp-socket-impl.h.

Referenced by CompleteFork(), ConnectionSucceeded(), FinishBind(), and GetSockName().

uint16_t ns3::NscTcpSocketImpl::m_localPort

private

Definition at line 146 of file nsc-tcp-socket-impl.h.

Referenced by Bind(), CompleteFork(), ConnectionSucceeded(), FinishBind(), GetSockName(), and Listen().

Ptr<Node> ns3::NscTcpSocketImpl::m_node

private

Definition at line 140 of file nsc-tcp-socket-impl.h.

Referenced by Destroy(), GetNode(), SetNode(), and ~NscTcpSocketImpl().

bool ns3::NscTcpSocketImpl::m_noDelay

private

Definition at line 137 of file nsc-tcp-socket-impl.h.

Referenced by GetTcpNoDelay(), and SetTcpNoDelay().

INetStreamSocket* ns3::NscTcpSocketImpl::m_nscTcpSocket

private

Definition at line 180 of file nsc-tcp-socket-impl.h.

Referenced by Accept(), Close(), CompleteFork(), Connect(), ConnectionSucceeded(), Listen(), NSCWakeup(), ReadPendingData(), SendPendingData(), and SetTcp().

InetSocketAddress ns3::NscTcpSocketImpl::m_peerAddress

private

Definition at line 147 of file nsc-tcp-socket-impl.h.

Referenced by CompleteFork(), and ReadPendingData().

Time ns3::NscTcpSocketImpl::m_persistTimeout

private

Definition at line 175 of file nsc-tcp-socket-impl.h.

Referenced by GetPersistTimeout(), and SetPersistTimeout().

uint32_t ns3::NscTcpSocketImpl::m_rcvBufSize

private

Definition at line 184 of file nsc-tcp-socket-impl.h.

Referenced by GetRcvBufSize(), and SetRcvBufSize().

Ipv4Address ns3::NscTcpSocketImpl::m_remoteAddress

private

Definition at line 142 of file nsc-tcp-socket-impl.h.

Referenced by CompleteFork(), Connect(), and ConnectionSucceeded().

uint16_t ns3::NscTcpSocketImpl::m_remotePort

private

Definition at line 143 of file nsc-tcp-socket-impl.h.

Referenced by CompleteFork(), Connect(), and ConnectionSucceeded().

uint32_t ns3::NscTcpSocketImpl::m_rxAvailable

private

Definition at line 179 of file nsc-tcp-socket-impl.h.

Referenced by GetRxAvailable(), ReadPendingData(), and Recv().

uint32_t ns3::NscTcpSocketImpl::m_rxWindowSize

private

Definition at line 163 of file nsc-tcp-socket-impl.h.

Referenced by SetNode().

uint32_t ns3::NscTcpSocketImpl::m_segmentSize

private

Definition at line 162 of file nsc-tcp-socket-impl.h.

Referenced by GetSegSize(), SetNode(), and SetSegSize().

bool ns3::NscTcpSocketImpl::m_shutdownRecv

private

Definition at line 150 of file nsc-tcp-socket-impl.h.

Referenced by ShutdownRecv().

bool ns3::NscTcpSocketImpl::m_shutdownSend

private

Definition at line 149 of file nsc-tcp-socket-impl.h.

Referenced by ShutdownSend().

uint32_t ns3::NscTcpSocketImpl::m_sndBufSize

private

Definition at line 183 of file nsc-tcp-socket-impl.h.

Referenced by GetSndBufSize(), GetTxAvailable(), and SetSndBufSize().

uint32_t ns3::NscTcpSocketImpl::m_ssThresh

private

Definition at line 166 of file nsc-tcp-socket-impl.h.

Referenced by GetSSThresh(), and SetSSThresh().

TracedValue<TcpStates_t> ns3::NscTcpSocketImpl::m_state

private

Definition at line 154 of file nsc-tcp-socket-impl.h.

Referenced by Accept(), Close(), CompleteFork(), Connect(), Listen(), NSCWakeup(), ReadPendingData(), Send(), and SendPendingData().

Ptr<NscTcpL4Protocol> ns3::NscTcpSocketImpl::m_tcp

private

Definition at line 141 of file nsc-tcp-socket-impl.h.

Referenced by Bind(), CompleteFork(), Destroy(), SetTcp(), and ~NscTcpSocketImpl().

std::queue<Ptr<Packet> > ns3::NscTcpSocketImpl::m_txBuffer

private

Definition at line 158 of file nsc-tcp-socket-impl.h.

Referenced by Close(), NscTcpSocketImpl(), NSCWakeup(), Send(), and SendPendingData().

uint32_t ns3::NscTcpSocketImpl::m_txBufferSize

private

Definition at line 159 of file nsc-tcp-socket-impl.h.

Referenced by GetTxAvailable(), Send(), and SendPendingData().

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

src/internet/model/nsc-tcp-socket-impl.h
src/internet/model/nsc-tcp-socket-impl.cc

Public Member Functions

Static Public Member Functions

Private Member Functions

Private Attributes

Friends

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Detailed Description

Constructor & Destructor Documentation

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