#include <ipv4-header.h>

Inheritance diagram for ns3::Ipv4Header:

Collaboration diagram for ns3::Ipv4Header:

Public Types
enum	DscpType { DscpDefault = 0x00, CS1 = 0x20, AF11 = 0x28, AF12 = 0x30, AF13 = 0x38, CS2 = 0x40, AF21 = 0x48, AF22 = 0x50, AF23 = 0x58, CS3 = 0x60, AF31 = 0x68, AF32 = 0x70, AF33 = 0x78, CS4 = 0x80, AF41 = 0x88, AF42 = 0x90, AF43 = 0x98, CS5 = 0xA0, EF = 0xB8, CS6 = 0xC0, CS7 = 0xE0 }
	DiffServ Code Points Code Points defined in Assured Forwarding (AF) RFC 2597 Expedited Forwarding (EF) RFC 2598 Default and Class Selector (CS) RFC 2474. More...
enum	EcnType { NotECT = 0x00, ECT1 = 0x01, ECT0 = 0x02, CE = 0x03 }
	ECN Type defined in RFC 3168. More...

Public Member Functions
	Ipv4Header ()
	Construct a null IPv4 header.
virtual uint32_t	Deserialize (Buffer::Iterator start)
std::string	DscpTypeToString (DscpType dscp) const
std::string	EcnTypeToString (EcnType ecn) const
void	EnableChecksum (void)
	Enable checksum calculation for this header.
Ipv4Address	GetDestination (void) const
DscpType	GetDscp (void) const
EcnType	GetEcn (void) const
uint16_t	GetFragmentOffset (void) const
uint16_t	GetIdentification (void) const
virtual TypeId	GetInstanceTypeId (void) const
uint16_t	GetPayloadSize (void) const
uint8_t	GetProtocol (void) const
virtual uint32_t	GetSerializedSize (void) const
Ipv4Address	GetSource (void) const
uint8_t	GetTos (void) const
uint8_t	GetTtl (void) const
bool	IsChecksumOk (void) const
bool	IsDontFragment (void) const
bool	IsLastFragment (void) const
virtual void	Print (std::ostream &os) const
virtual void	Serialize (Buffer::Iterator start) const
void	SetDestination (Ipv4Address destination)
void	SetDontFragment (void)
void	SetDscp (DscpType dscp)
	Set DSCP Field.
void	SetEcn (EcnType ecn)
	Set ECN Field.
void	SetFragmentOffset (uint16_t offsetBytes)
void	SetIdentification (uint16_t identification)
void	SetLastFragment (void)
void	SetMayFragment (void)
void	SetMoreFragments (void)
void	SetPayloadSize (uint16_t size)
void	SetProtocol (uint8_t num)
void	SetSource (Ipv4Address source)
void	SetTos (uint8_t tos)
void	SetTtl (uint8_t ttl)
Public Member Functions inherited from ns3::Header
virtual	~Header ()

Static Public Member Functions
static TypeId	GetTypeId (void)

Private Types
enum	FlagsE { DONT_FRAGMENT = (1<<0), MORE_FRAGMENTS = (1<<1) }

Private Attributes
bool	m_calcChecksum
uint16_t	m_checksum
Ipv4Address	m_destination
uint32_t	m_flags: 3
uint16_t	m_fragmentOffset
bool	m_goodChecksum
uint16_t	m_headerSize
uint16_t	m_identification
uint16_t	m_payloadSize
uint32_t	m_protocol: 8
Ipv4Address	m_source
uint32_t	m_tos: 8
uint32_t	m_ttl: 8

Additional Inherited Members
Protected Member Functions inherited from ns3::ObjectBase
void	ConstructSelf (const AttributeConstructionList &attributes)
virtual void	NotifyConstructionCompleted (void)

Detailed Description

Packet header for IPv4.

This type is not accessible from the Config system.
No Attributes are defined for this type.
No TraceSources are defined for this type.

Definition at line 31 of file ipv4-header.h.

Member Enumeration Documentation

enum ns3::Ipv4Header::DscpType

DiffServ Code Points Code Points defined in Assured Forwarding (AF) RFC 2597 Expedited Forwarding (EF) RFC 2598 Default and Class Selector (CS) RFC 2474.

Enumerator:

DscpDefault
CS1
AF11
AF12
AF13
CS2
AF21
AF22
AF23
CS3
AF31
AF32
AF33
CS4
AF41
AF42
AF43
CS5
EF
CS6
CS7

Definition at line 64 of file ipv4-header.h.

enum ns3::Ipv4Header::EcnType

ECN Type defined in RFC 3168.

Enumerator:

NotECT
ECT1
ECT0
CE

Definition at line 105 of file ipv4-header.h.

enum ns3::Ipv4Header::FlagsE

private

Enumerator:

DONT_FRAGMENT
MORE_FRAGMENTS

Definition at line 229 of file ipv4-header.h.

Constructor & Destructor Documentation

ns3::Ipv4Header::Ipv4Header ( )

Construct a null IPv4 header.

Definition at line 33 of file ipv4-header.cc.

Member Function Documentation

uint32_t ns3::Ipv4Header::Deserialize ( Buffer::Iterator start )

virtual

Parameters

start an iterator which points to where the header should written.

Returns: the number of bytes read.

This method is used by Packet::RemoveHeader to re-create a header from the byte buffer of a packet. The data read is expected to match bit-for-bit the representation of this header in real networks.

Implements ns3::Header.

Definition at line 387 of file ipv4-header.cc.

References ns3::Buffer::Iterator::CalculateIpChecksum(), DONT_FRAGMENT, GetSerializedSize(), m_calcChecksum, m_checksum, m_destination, m_flags, m_fragmentOffset, m_goodChecksum, m_headerSize, m_identification, m_payloadSize, m_protocol, m_source, m_tos, m_ttl, MORE_FRAGMENTS, NS_ASSERT, NS_LOG_LOGIC, ns3::Buffer::Iterator::Prev(), ns3::Buffer::Iterator::ReadNtohU16(), ns3::Buffer::Iterator::ReadNtohU32(), ns3::Buffer::Iterator::ReadU16(), ns3::Buffer::Iterator::ReadU8(), ns3::Ipv4Address::Set(), and visualizer.core::start().

Referenced by ns3::Icmpv4DestinationUnreachable::Deserialize(), and ns3::Icmpv4TimeExceeded::Deserialize().

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std::string ns3::Ipv4Header::DscpTypeToString ( DscpType dscp ) const

Returns: std::string of DSCPType

Definition at line 104 of file ipv4-header.cc.

References AF11, AF12, AF13, AF21, AF22, AF23, AF31, AF32, AF33, AF41, AF42, AF43, CS1, CS2, CS3, CS4, CS5, CS6, CS7, DscpDefault, and EF.

Referenced by Print().

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std::string ns3::Ipv4Header::EcnTypeToString ( EcnType ecn ) const

Returns: std::string of ECNType

Definition at line 164 of file ipv4-header.cc.

References CE, ECT0, ECT1, and NotECT.

Referenced by Print().

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void ns3::Ipv4Header::EnableChecksum ( void )

Enable checksum calculation for this header.

Definition at line 49 of file ipv4-header.cc.

References m_calcChecksum.

Referenced by ns3::Ipv4L3Protocol::BuildHeader(), ns3::Ipv4L3Protocol::DoFragmentation(), ns3::NscTcpL4Protocol::Receive(), ns3::Ipv4L3Protocol::Receive(), and ns3::Ipv4L3Protocol::SendWithHeader().

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Ipv4Address ns3::Ipv4Header::GetDestination ( void ) const

Returns: the destination address of this packet

Definition at line 275 of file ipv4-header.cc.

References m_destination.

Referenced by ns3::dsr::DsrRouting::CallCancelPacketTimer(), ns3::IpcsClassifier::Classify(), ns3::Ipv4FlowClassifier::Classify(), ns3::EpcTftClassifier::Classify(), ns3::aodv::RoutingProtocol::DeferredRouteOutput(), ns3::TcpSocketBase::DoForwardUp(), ns3::aodv::QueueEntryTest::DoRun(), ns3::UdpSocketImpl::DoSendTo(), ns3::aodv::RequestQueue::Drop(), ns3::dsdv::PacketQueue::Drop(), ns3::dsdv::RoutingProtocol::Drop(), ns3::Ipv4FlowProbe::DropLogger(), ns3::aodv::RequestQueue::Enqueue(), ns3::dsdv::PacketQueue::Enqueue(), ns3::Icmpv4L4Protocol::Forward(), ns3::aodv::RoutingProtocol::Forwarding(), ns3::Ipv4RawSocketImpl::ForwardUp(), ns3::Ipv4L3Protocol::IpMulticastForward(), ns3::aodv::RequestQueue::IsEqual(), ns3::dsdv::PacketQueue::IsEqual(), ns3::Ipv4L3Protocol::LocalDeliver(), ns3::dsdv::RoutingProtocol::LoopbackRoute(), ns3::aodv::RoutingProtocol::LoopbackRoute(), ns3::aodv::QueueEntry::operator==(), ns3::dsdv::QueueEntry::operator==(), ns3::dsr::DsrOptionSR::Process(), ns3::Ipv4L3Protocol::ProcessFragment(), ns3::dsr::DsrRouting::PromiscReceive(), ns3::Icmpv4L4Protocol::Receive(), ns3::NscTcpL4Protocol::Receive(), ns3::UdpL4Protocol::Receive(), ns3::TcpL4Protocol::Receive(), ns3::dsr::DsrRouting::Receive(), ns3::EpcSgwPgwApplication::RecvFromTunDevice(), ns3::aodv::RoutingProtocol::RouteInput(), ns3::dsdv::RoutingProtocol::RouteInput(), ns3::Ipv4StaticRouting::RouteInput(), ns3::Ipv4ListRouting::RouteInput(), ns3::Ipv4GlobalRouting::RouteInput(), ns3::Ipv4NixVectorRouting::RouteInput(), ns3::olsr::RoutingProtocol::RouteInput(), ns3::aodv::RoutingProtocol::RouteOutput(), ns3::dsdv::RoutingProtocol::RouteOutput(), ns3::Ipv4StaticRouting::RouteOutput(), ns3::Ipv4ListRouting::RouteOutput(), ns3::Ipv4GlobalRouting::RouteOutput(), ns3::Ipv4NixVectorRouting::RouteOutput(), ns3::olsr::RoutingProtocol::RouteOutput(), ns3::dsdv::RoutingProtocol::Send(), ns3::Ipv4L3Protocol::SendRealOut(), and ns3::Ipv4RawSocketImpl::SendTo().

Ipv4Header::DscpType ns3::Ipv4Header::GetDscp ( void ) const

Returns: the DSCP field of this packet.

Definition at line 97 of file ipv4-header.cc.

References m_tos.

Referenced by Ipv4HeaderTest::DoRun(), and Print().

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Ipv4Header::EcnType ns3::Ipv4Header::GetEcn ( void ) const

Returns: the ECN field of this packet.

Definition at line 157 of file ipv4-header.cc.

References m_tos.

Referenced by Ipv4HeaderTest::DoRun(), and Print().

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uint16_t ns3::Ipv4Header::GetFragmentOffset ( void ) const

Returns: the offset of this fragment measured in bytes from the start.

Definition at line 226 of file ipv4-header.cc.

References m_fragmentOffset, m_payloadSize, and NS_LOG_WARN.

Referenced by ns3::Ipv4L3Protocol::DoFragmentation(), ns3::Ipv4L3Protocol::LocalDeliver(), and ns3::Ipv4L3Protocol::ProcessFragment().

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uint16_t ns3::Ipv4Header::GetIdentification ( void ) const

Returns: the identification field of this packet.

Definition at line 66 of file ipv4-header.cc.

References m_identification.

Referenced by ns3::Ipv4FlowClassifier::Classify(), and ns3::Ipv4L3Protocol::ProcessFragment().

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TypeId ns3::Ipv4Header::GetInstanceTypeId ( void ) const

virtual

Returns: the TypeId associated to the most-derived type of this instance.

This method is typically implemented by ns3::Object::GetInstanceTypeId but some classes which derive from ns3::ObjectBase directly have to implement it themselves.

Implements ns3::ObjectBase.

Definition at line 297 of file ipv4-header.cc.

References GetTypeId().

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uint16_t ns3::Ipv4Header::GetPayloadSize ( void ) const

Returns: the size of the payload in bytes

Definition at line 60 of file ipv4-header.cc.

References m_payloadSize.

Referenced by ns3::Ipv4L3Protocol::Receive().

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uint8_t ns3::Ipv4Header::GetProtocol ( void ) const

Returns: the protocol field of this packet

Definition at line 248 of file ipv4-header.cc.

References m_protocol.

Referenced by ns3::IpcsClassifier::Classify(), ns3::Ipv4FlowClassifier::Classify(), ns3::EpcTftClassifier::Classify(), ns3::aodv::RoutingProtocol::DeferredRouteOutput(), ns3::Icmpv4L4Protocol::Forward(), ns3::Ipv4RawSocketImpl::ForwardUp(), ns3::Ipv4L3Protocol::LocalDeliver(), ns3::Ipv4L3Protocol::ProcessFragment(), ns3::dsr::DsrRouting::PromiscReceive(), and ns3::dsdv::RoutingProtocol::Send().

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uint32_t ns3::Ipv4Header::GetSerializedSize ( void ) const

virtual

Returns: the expected size of the header.

This method is used by Packet::AddHeader to store a header into the byte buffer of a packet. This method should return the number of bytes which are needed to store the full header data by Serialize.

Implements ns3::Header.

Definition at line 341 of file ipv4-header.cc.

References m_headerSize.

Referenced by Deserialize(), ns3::Ipv4L3Protocol::DoFragmentation(), ns3::Ipv4FlowProbe::DropLogger(), ns3::Ipv4FlowProbe::ForwardLogger(), ns3::Ipv4FlowProbe::ForwardUpLogger(), ns3::Icmpv4DestinationUnreachable::GetSerializedSize(), ns3::Icmpv4TimeExceeded::GetSerializedSize(), ns3::Ipv4FlowProbe::SendOutgoingLogger(), ns3::Icmpv4DestinationUnreachable::Serialize(), and ns3::Icmpv4TimeExceeded::Serialize().

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Ipv4Address ns3::Ipv4Header::GetSource ( void ) const

Returns: the source address of this packet

Definition at line 264 of file ipv4-header.cc.

References m_source.

Referenced by ns3::dsr::DsrRouting::CallCancelPacketTimer(), ns3::IpcsClassifier::Classify(), ns3::Ipv4FlowClassifier::Classify(), ns3::EpcTftClassifier::Classify(), ns3::TcpSocketBase::DoForwardUp(), ns3::aodv::QueueEntryTest::DoRun(), ns3::UdpSocketImpl::DoSendTo(), ns3::Icmpv4L4Protocol::Forward(), ns3::aodv::RoutingProtocol::Forwarding(), ns3::Ipv4RawSocketImpl::ForwardUp(), ns3::UdpSocketImpl::ForwardUp(), ns3::Ipv4L3Protocol::IpMulticastForward(), ns3::aodv::DuplicatePacketDetection::IsDuplicate(), ns3::dsr::DsrOptionRreq::Process(), ns3::dsr::DsrOptionSR::Process(), ns3::dsr::DsrOptionAckReq::Process(), ns3::Ipv4L3Protocol::ProcessFragment(), ns3::dsr::DsrRouting::PromiscReceive(), ns3::Icmpv4L4Protocol::Receive(), ns3::NscTcpL4Protocol::Receive(), ns3::UdpL4Protocol::Receive(), ns3::TcpL4Protocol::Receive(), ns3::dsr::DsrRouting::Receive(), ns3::aodv::RoutingProtocol::RouteInput(), ns3::dsdv::RoutingProtocol::RouteInput(), ns3::Ipv4StaticRouting::RouteInput(), ns3::Ipv4GlobalRouting::RouteInput(), ns3::olsr::RoutingProtocol::RouteInput(), ns3::Ipv4ListRouting::RouteOutput(), ns3::Icmpv4L4Protocol::SendDestUnreach(), ns3::Icmpv4L4Protocol::SendTimeExceededTtl(), and ns3::Ipv4RawSocketImpl::SendTo().

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uint8_t ns3::Ipv4Header::GetTos ( void ) const

Returns: the TOS field of this packet.

Definition at line 182 of file ipv4-header.cc.

References m_tos.

Referenced by ns3::EpcTftClassifier::Classify(), and ns3::UdpSocketImpl::ForwardUp().

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uint8_t ns3::Ipv4Header::GetTtl ( void ) const

Returns: the TTL field of this packet

Definition at line 242 of file ipv4-header.cc.

References m_ttl.

Referenced by ns3::Icmpv4L4Protocol::Forward(), ns3::UdpSocketImpl::ForwardUp(), ns3::Ipv4L3Protocol::IpMulticastForward(), ns3::dsr::DsrOptionRreq::Process(), ns3::aodv::RoutingProtocol::RouteInput(), ns3::dsdv::RoutingProtocol::RouteInput(), ns3::dsdv::RoutingProtocol::SendPacketFromQueue(), ns3::aodv::RoutingProtocol::SendPacketFromQueue(), and SinkRx().

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TypeId ns3::Ipv4Header::GetTypeId ( void )

static

Reimplemented from ns3::Header.

Definition at line 288 of file ipv4-header.cc.

References ns3::TypeId::SetParent().

Referenced by GetInstanceTypeId().

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bool ns3::Ipv4Header::IsChecksumOk ( void ) const

Returns: true if the ipv4 checksum is correct, false otherwise.

If Ipv4Header::EnableChecksums has not been called prior to deserializing this header, this method will always return true.

Definition at line 282 of file ipv4-header.cc.

References m_goodChecksum.

Referenced by ns3::Ipv4L3Protocol::Receive().

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bool ns3::Ipv4Header::IsDontFragment ( void ) const

Returns: true if this is this packet can be fragmented.

Definition at line 213 of file ipv4-header.cc.

References DONT_FRAGMENT, and m_flags.

bool ns3::Ipv4Header::IsLastFragment ( void ) const

Returns: true if this is the last fragment of a packet, false otherwise.

Definition at line 197 of file ipv4-header.cc.

References m_flags, and MORE_FRAGMENTS.

Referenced by ns3::Ipv4L3Protocol::DoFragmentation(), ns3::Ipv4L3Protocol::LocalDeliver(), and ns3::Ipv4L3Protocol::ProcessFragment().

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void ns3::Ipv4Header::Print ( std::ostream & os ) const

virtual

Parameters

os output stream This method is used by Packet::Print to print the content of a trailer as ascii data to a c++ output stream. Although the trailer is free to format its output as it wishes, it is recommended to follow a few rules to integrate with the packet pretty printer: start with flags, small field values located between a pair of parens. Values should be separated by whitespace. Follow the parens with the important fields, separated by whitespace. i.e.: (field1 val1 field2 val2 field3 val3) field4 val4 field5 val5

Implements ns3::Header.

Definition at line 302 of file ipv4-header.cc.

References DONT_FRAGMENT, DscpTypeToString(), EcnTypeToString(), GetDscp(), GetEcn(), m_destination, m_flags, m_fragmentOffset, m_identification, m_payloadSize, m_protocol, m_source, m_tos, m_ttl, and MORE_FRAGMENTS.

Referenced by Ipv4HeaderTest::DoRun(), ns3::Icmpv4DestinationUnreachable::Print(), and ns3::Icmpv4TimeExceeded::Print().

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void ns3::Ipv4Header::Serialize ( Buffer::Iterator start ) const

virtual

Parameters

start an iterator which points to where the header should be written.

This method is used by Packet::AddHeader to store a header into the byte buffer of a packet. The data written is expected to match bit-for-bit the representation of this header in a real network.

Implements ns3::Header.

Definition at line 348 of file ipv4-header.cc.

References ns3::Buffer::Iterator::CalculateIpChecksum(), DONT_FRAGMENT, ns3::Ipv4Address::Get(), m_calcChecksum, m_destination, m_flags, m_fragmentOffset, m_identification, m_payloadSize, m_protocol, m_source, m_tos, m_ttl, MORE_FRAGMENTS, ns3::Buffer::Iterator::Next(), NS_LOG_LOGIC, visualizer.core::start(), ns3::Buffer::Iterator::WriteHtonU16(), ns3::Buffer::Iterator::WriteHtonU32(), ns3::Buffer::Iterator::WriteU16(), and ns3::Buffer::Iterator::WriteU8().

Referenced by ns3::Icmpv4DestinationUnreachable::Serialize(), and ns3::Icmpv4TimeExceeded::Serialize().

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void ns3::Ipv4Header::SetDestination ( Ipv4Address destination )

Parameters

destination the destination of this packet.

Definition at line 270 of file ipv4-header.cc.

References m_destination.

Referenced by ns3::Ipv4L3Protocol::BuildHeader(), ns3::aodv::QueueEntryTest::DoRun(), ns3::aodv::AodvRqueueTest::DoRun(), ns3::UdpSocketImpl::DoSendTo(), ns3::EpcTftClassifierTestCase::EpcTftClassifierTestCase(), ns3::NscTcpL4Protocol::Receive(), ns3::TcpL4Protocol::Send(), ns3::ArpL3Protocol::SendArpRequest(), ns3::Icmpv4L4Protocol::SendMessage(), ns3::TcpL4Protocol::SendPacket(), ns3::Ipv4RawSocketImpl::SendTo(), and ns3::TcpSocketBase::SetupEndpoint().

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void ns3::Ipv4Header::SetDontFragment ( void )

Don't fragment this packet: if you need to anyway, drop it.

Definition at line 203 of file ipv4-header.cc.

References DONT_FRAGMENT, and m_flags.

Referenced by ns3::Ipv4L3Protocol::BuildHeader().

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void ns3::Ipv4Header::SetDscp ( DscpType dscp )

Set DSCP Field.

Parameters

dscp	DSCP value

Definition at line 83 of file ipv4-header.cc.

References m_tos.

void ns3::Ipv4Header::SetEcn ( EcnType ecn )

Set ECN Field.

Parameters

ecn ECN Type

Definition at line 90 of file ipv4-header.cc.

References m_tos.

void ns3::Ipv4Header::SetFragmentOffset ( uint16_t offsetBytes )

The offset is measured in bytes for the packet start. Mind that IPv4 "fragment offset" field is 13 bits long and is measured in 8-bytes words. Hence, the function does enforce that the offset is a multiple of 8.

Parameters

offsetBytes the ipv4 fragment offset measured in bytes from the start.

Definition at line 219 of file ipv4-header.cc.

References m_fragmentOffset, and NS_ABORT_MSG_IF.

Referenced by ns3::Ipv4L3Protocol::DoFragmentation().

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