#include "ipv4-header.h"

Inheritance diagram for ns3::Ipv4Header:

Public Types
enum	DscpType { DscpDefault = 0x00, DSCP_CS1 = 0x08, DSCP_AF11 = 0x0A, DSCP_AF12 = 0x0C, DSCP_AF13 = 0x0E, DSCP_CS2 = 0x10, DSCP_AF21 = 0x12, DSCP_AF22 = 0x14, DSCP_AF23 = 0x16, DSCP_CS3 = 0x18, DSCP_AF31 = 0x1A, DSCP_AF32 = 0x1C, DSCP_AF33 = 0x1E, DSCP_CS4 = 0x20, DSCP_AF41 = 0x22, DSCP_AF42 = 0x24, DSCP_AF43 = 0x26, DSCP_CS5 = 0x28, DSCP_EF = 0x2E, DSCP_CS6 = 0x30, DSCP_CS7 = 0x38 }
	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 { ECN_NotECT = 0x00, ECN_ECT1 = 0x01, ECN_ECT0 = 0x02, ECN_CE = 0x03 }
	ECN Type defined in RFC 3168 More...

Public Member Functions
	Ipv4Header ()
	Construct a null IPv4 header. More...

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. More...

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
	Get the most derived TypeId for this Object. More...

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

void	SetDscp (DscpType dscp)
	Set DSCP Field. More...

void	SetEcn (EcnType ecn)
	Set ECN Field. More...

void	SetFragmentOffset (uint16_t offsetBytes)
	The offset is measured in bytes for the packet start. More...

void	SetIdentification (uint16_t identification)

void	SetLastFragment (void)
	This packet is the last packet of a fragmented ipv4 packet. More...

void	SetMayFragment (void)
	If you need to fragment this packet, you can do it. More...

void	SetMoreFragments (void)
	This packet is not the last packet of a fragmented ipv4 packet. More...

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 ()

virtual uint32_t	Deserialize (Buffer::Iterator start, Buffer::Iterator end)
	Deserialize the object from a buffer iterator. More...

virtual uint32_t	Deserialize (Buffer::Iterator start)=0
	Deserialize the object from a buffer iterator. More...

Public Member Functions inherited from ns3::Chunk
virtual uint32_t	Deserialize (Buffer::Iterator start, Buffer::Iterator end)
	Deserialize the object from a buffer iterator. 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::Header
static TypeId	GetTypeId (void)
	Get the type ID. More...

Static Public Member Functions inherited from ns3::Chunk
static TypeId	GetTypeId (void)
	Get the type ID. More...

Static Public Member Functions inherited from ns3::ObjectBase
static TypeId	GetTypeId (void)
	Get the type ID. More...

Private Types
enum	FlagsE { DONT_FRAGMENT = (1<<0), MORE_FRAGMENTS = (1<<1) }
	flags related to IP fragmentation More...

Private Attributes
bool	m_calcChecksum
	true if the checksum must be calculated More...

uint16_t	m_checksum
	checksum More...

Ipv4Address	m_destination
	destination address More...

uint32_t	m_flags: 3
	flags More...

uint16_t	m_fragmentOffset
	Fragment offset. More...

bool	m_goodChecksum
	true if checksum is correct More...

uint16_t	m_headerSize
	IP header size. More...

uint16_t	m_identification
	identification More...

uint16_t	m_payloadSize
	payload size More...

uint32_t	m_protocol: 8
	Protocol. More...

Ipv4Address	m_source
	source address More...

uint32_t	m_tos: 8
	TOS, also used as DSCP + ECN value. More...

uint32_t	m_ttl: 8
	TTL. More...

Additional Inherited Members
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...

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...

Detailed Description

Packet header for IPv4.

Introspection did not find any typical Config paths.

No Attributes are defined for this type.
No TraceSources are defined for this type.
Size of this type is 40 bytes (on a 64-bit architecture).

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

Member Enumeration Documentation

◆ DscpType

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
DSCP_CS1
DSCP_AF11
DSCP_AF12
DSCP_AF13
DSCP_CS2
DSCP_AF21
DSCP_AF22
DSCP_AF23
DSCP_CS3
DSCP_AF31
DSCP_AF32
DSCP_AF33
DSCP_CS4
DSCP_AF41
DSCP_AF42
DSCP_AF43
DSCP_CS5
DSCP_EF
DSCP_CS6
DSCP_CS7

Definition at line 67 of file ipv4-header.h.

◆ EcnType

enum ns3::Ipv4Header::EcnType

ECN Type defined in RFC 3168

Enumerator
ECN_NotECT
ECN_ECT1
ECN_ECT0
ECN_CE

Definition at line 109 of file ipv4-header.h.

◆ FlagsE

enum ns3::Ipv4Header::FlagsE

private

flags related to IP fragmentation

Enumerator
DONT_FRAGMENT
MORE_FRAGMENTS

Definition at line 241 of file ipv4-header.h.

Constructor & Destructor Documentation

◆ Ipv4Header()

ns3::Ipv4Header::Ipv4Header ( )

Construct a null IPv4 header.

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

Member Function Documentation

◆ Deserialize()

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

virtual

Parameters

start an iterator which points to where the header should read from.

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.

Note that data is not actually removed from the buffer to which the iterator points. Both Packet::RemoveHeader() and Packet::PeekHeader() call Deserialize(), but only the RemoveHeader() has additional statements to remove the header bytes from the underlying buffer and associated metadata.

Implements ns3::Header.

Definition at line 423 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_LOG_FUNCTION, NS_LOG_LOGIC(), NS_LOG_WARN, 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().

◆ DscpTypeToString()

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

Parameters

dscp the dscp

Returns: std::string of DSCPType

Definition at line 113 of file ipv4-header.cc.

References DSCP_AF11, DSCP_AF12, DSCP_AF13, DSCP_AF21, DSCP_AF22, DSCP_AF23, DSCP_AF31, DSCP_AF32, DSCP_AF33, DSCP_AF41, DSCP_AF42, DSCP_AF43, DSCP_CS1, DSCP_CS2, DSCP_CS3, DSCP_CS4, DSCP_CS5, DSCP_CS6, DSCP_CS7, DSCP_EF, DscpDefault, and NS_LOG_FUNCTION.

Referenced by Print().

◆ EcnTypeToString()

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

Parameters

ecn	the ECNType

Returns: std::string of ECNType

Definition at line 175 of file ipv4-header.cc.

References ECN_CE, ECN_ECT0, ECN_ECT1, ECN_NotECT, and NS_LOG_FUNCTION.

Referenced by Print().

◆ EnableChecksum()

void ns3::Ipv4Header::EnableChecksum ( void )

Enable checksum calculation for this header.

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

References m_calcChecksum, and NS_LOG_FUNCTION.

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

◆ GetDestination()

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

Returns: the destination address of this packet

Definition at line 304 of file ipv4-header.cc.

References m_destination, and NS_LOG_FUNCTION.

Referenced by ns3::dsr::DsrRouting::CallCancelPacketTimer(), ns3::IpcsClassifier::Classify(), ns3::Ipv4FlowClassifier::Classify(), ns3::EpcTftClassifier::Classify(), ns3::aodv::RoutingProtocol::DeferredRouteOutput(), ns3::aodv::QueueEntryTest::DoRun(), ns3::UdpSocketImpl::DoSendTo(), ns3::dsdv::RoutingProtocol::Drop(), ns3::aodv::RequestQueue::Drop(), ns3::dsdv::PacketQueue::Drop(), ns3::Ipv4FlowProbe::DropLogger(), ns3::dsdv::PacketQueue::Enqueue(), ns3::aodv::RequestQueue::Enqueue(), ns3::Icmpv4L4Protocol::Forward(), ns3::aodv::RoutingProtocol::Forwarding(), ns3::Ipv4FlowProbe::ForwardLogger(), ns3::Ipv4RawSocketImpl::ForwardUp(), ns3::TcpSocketBase::ForwardUp(), ns3::Ipv4FlowProbe::ForwardUpLogger(), ns3::Ipv4QueueDiscItem::Hash(), 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::Ipv4StaticRouting::RouteInput(), ns3::dsdv::RoutingProtocol::RouteInput(), ns3::Ipv4ListRouting::RouteInput(), ns3::Ipv4GlobalRouting::RouteInput(), ns3::Rip::RouteInput(), ns3::olsr::RoutingProtocol::RouteInput(), ns3::aodv::RoutingProtocol::RouteOutput(), ns3::dsdv::RoutingProtocol::RouteOutput(), ns3::Ipv4StaticRouting::RouteOutput(), ns3::Ipv4ListRouting::RouteOutput(), ns3::Ipv4GlobalRouting::RouteOutput(), ns3::Rip::RouteOutput(), ns3::olsr::RoutingProtocol::RouteOutput(), ns3::dsdv::RoutingProtocol::Send(), ns3::Ipv4FlowProbe::SendOutgoingLogger(), ns3::Ipv4L3Protocol::SendRealOut(), and ns3::Ipv4RawSocketImpl::SendTo().

◆ GetDscp()

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

Returns: the DSCP field of this packet.

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

References m_tos, and NS_LOG_FUNCTION.

Referenced by ns3::Ipv4FlowClassifier::Classify(), Ipv4HeaderTest::DoRun(), and Print().

◆ GetEcn()

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

Returns: the ECN field of this packet.

Definition at line 167 of file ipv4-header.cc.

References m_tos, and NS_LOG_FUNCTION.

Referenced by Ipv4HeaderTest::DoRun(), ns3::TcpSocketBase::ForwardUp(), ns3::Ipv4QueueDiscItem::Mark(), and Print().

◆ GetFragmentOffset()

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

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

Definition at line 246 of file ipv4-header.cc.

References m_fragmentOffset, m_payloadSize, NS_LOG_FUNCTION, and NS_LOG_WARN.

Referenced by ns3::Ipv4FlowClassifier::Classify(), ns3::EpcTftClassifier::Classify(), ns3::Ipv4L3Protocol::DoFragmentation(), ns3::Ipv4FlowProbe::ForwardLogger(), ns3::Ipv4QueueDiscItem::Hash(), ns3::Ipv4L3Protocol::LocalDeliver(), ns3::dsr::DsrOptionSR::Process(), and ns3::Ipv4L3Protocol::ProcessFragment().

◆ GetIdentification()

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

Returns: the identification field of this packet.

Definition at line 69 of file ipv4-header.cc.

References m_identification, and NS_LOG_FUNCTION.

Referenced by ns3::EpcTftClassifier::Classify(), ns3::dsr::DsrOptionSR::Process(), and ns3::Ipv4L3Protocol::ProcessFragment().

◆ GetInstanceTypeId()

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

virtual

Get the most derived TypeId for this Object.

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

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

Implements ns3::ObjectBase.

Definition at line 329 of file ipv4-header.cc.

References GetTypeId(), and NS_LOG_FUNCTION.

◆ GetPayloadSize()

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

Returns: the size of the payload in bytes

Definition at line 62 of file ipv4-header.cc.

References m_payloadSize, and NS_LOG_FUNCTION.

Referenced by ns3::EpcTftClassifier::Classify(), and ns3::Ipv4L3Protocol::Receive().

◆ GetProtocol()

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

Returns: the protocol field of this packet

Definition at line 272 of file ipv4-header.cc.

References m_protocol, and NS_LOG_FUNCTION.

Referenced by ns3::IpcsClassifier::Classify(), ns3::Ipv4FlowClassifier::Classify(), ns3::EpcTftClassifier::Classify(), ns3::aodv::RoutingProtocol::DeferredRouteOutput(), ns3::Icmpv4L4Protocol::Forward(), ns3::Ipv4RawSocketImpl::ForwardUp(), ns3::Ipv4QueueDiscItem::Hash(), ns3::Ipv4L3Protocol::LocalDeliver(), ns3::Ipv4L3Protocol::ProcessFragment(), ns3::dsr::DsrRouting::PromiscReceive(), ns3::aodv::RoutingProtocol::RouteInput(), and ns3::dsdv::RoutingProtocol::Send().

◆ GetSerializedSize()

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 375 of file ipv4-header.cc.

References m_headerSize, and NS_LOG_FUNCTION.

Referenced by Deserialize(), ns3::Ipv4L3Protocol::DoFragmentation(), ns3::Rip::DoSendRouteUpdate(), ns3::Ipv4FlowProbe::DropLogger(), ns3::Ipv4FlowProbe::ForwardLogger(), ns3::Ipv4FlowProbe::ForwardUpLogger(), ns3::Icmpv4DestinationUnreachable::GetSerializedSize(), ns3::Icmpv4TimeExceeded::GetSerializedSize(), ns3::Ipv4QueueDiscItem::GetSize(), ns3::Rip::HandleRequests(), ns3::Ipv4FlowProbe::SendOutgoingLogger(), ns3::Ipv4L3Protocol::SendRealOut(), ns3::Ipv4RawSocketImpl::SendTo(), ns3::Icmpv4DestinationUnreachable::Serialize(), and ns3::Icmpv4TimeExceeded::Serialize().

◆ GetSource()

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

Returns: the source address of this packet

Definition at line 291 of file ipv4-header.cc.

References m_source, and NS_LOG_FUNCTION.

Referenced by ns3::dsr::DsrRouting::CallCancelPacketTimer(), ns3::IpcsClassifier::Classify(), ns3::Ipv4FlowClassifier::Classify(), ns3::EpcTftClassifier::Classify(), ns3::aodv::QueueEntryTest::DoRun(), ns3::UdpSocketImpl::DoSendTo(), ns3::Icmpv4L4Protocol::Forward(), ns3::aodv::RoutingProtocol::Forwarding(), ns3::Ipv4FlowProbe::ForwardLogger(), ns3::Ipv4RawSocketImpl::ForwardUp(), ns3::UdpSocketImpl::ForwardUp(), ns3::TcpSocketBase::ForwardUp(), ns3::Ipv4FlowProbe::ForwardUpLogger(), ns3::Ipv4QueueDiscItem::Hash(), ns3::Ipv4L3Protocol::IpMulticastForward(), ns3::aodv::DuplicatePacketDetection::IsDuplicate(), ns3::dsr::DsrOptionRreq::Process(), ns3::dsr::DsrOptionSR::Process(), ns3::Ipv4L3Protocol::ProcessFragment(), ns3::dsr::DsrRouting::PromiscReceive(), ns3::Icmpv4L4Protocol::Receive(), ns3::NscTcpL4Protocol::Receive(), ns3::Ipv4L3Protocol::Receive(), ns3::UdpL4Protocol::Receive(), ns3::TcpL4Protocol::Receive(), ns3::dsr::DsrRouting::Receive(), ns3::aodv::RoutingProtocol::RouteInput(), ns3::Ipv4StaticRouting::RouteInput(), ns3::dsdv::RoutingProtocol::RouteInput(), ns3::Ipv4GlobalRouting::RouteInput(), ns3::Rip::RouteInput(), ns3::olsr::RoutingProtocol::RouteInput(), ns3::Ipv4ListRouting::RouteOutput(), ns3::Icmpv4L4Protocol::SendDestUnreach(), ns3::Ipv4FlowProbe::SendOutgoingLogger(), ns3::Icmpv4L4Protocol::SendTimeExceededTtl(), and ns3::Ipv4RawSocketImpl::SendTo().

◆ GetTos()

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

Returns: the TOS field of this packet.

Definition at line 194 of file ipv4-header.cc.

References m_tos, and NS_LOG_FUNCTION.

Referenced by ns3::EpcTftClassifier::Classify(), ns3::Ipv4RawSocketImpl::ForwardUp(), ns3::UdpSocketImpl::ForwardUp(), UdpSocketImplTest::GetTos(), ns3::Ipv4QueueDiscItem::GetUint8Value(), and WifiAcMappingTest::PacketEnqueuedInWifiMacQueue().

◆ GetTtl()

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

Returns: the TTL field of this packet

Definition at line 265 of file ipv4-header.cc.

References m_ttl, and NS_LOG_FUNCTION.

Referenced by ns3::Icmpv4L4Protocol::Forward(), ns3::Ipv4RawSocketImpl::ForwardUp(), 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().

◆ GetTypeId()

TypeId ns3::Ipv4Header::GetTypeId ( void )

static

Get the type ID.

Returns: the object TypeId

Definition at line 319 of file ipv4-header.cc.

References ns3::TypeId::SetParent().

Referenced by GetInstanceTypeId().

◆ IsChecksumOk()

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 312 of file ipv4-header.cc.

References m_goodChecksum, and NS_LOG_FUNCTION.

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

◆ IsDontFragment()

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

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

Definition at line 231 of file ipv4-header.cc.

References DONT_FRAGMENT, m_flags, and NS_LOG_FUNCTION.

◆ IsLastFragment()

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

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

Definition at line 212 of file ipv4-header.cc.

References m_flags, MORE_FRAGMENTS, and NS_LOG_FUNCTION.

Referenced by ns3::EpcTftClassifier::Classify(), ns3::Ipv4L3Protocol::DoFragmentation(), ns3::Ipv4FlowProbe::ForwardLogger(), ns3::Ipv4L3Protocol::LocalDeliver(), and ns3::Ipv4L3Protocol::ProcessFragment().

◆ Print()

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 header as ascii data to a c++ output stream. Although the header 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 335 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, MORE_FRAGMENTS, and NS_LOG_FUNCTION.

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

◆ Serialize()

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 383 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_FUNCTION, 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().

◆ SetDestination()

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

Parameters

destination the destination of this packet.

Definition at line 298 of file ipv4-header.cc.

References m_destination, and NS_LOG_FUNCTION.

Referenced by ns3::Ipv4L3Protocol::BuildHeader(), FqCoDelQueueDiscIPFlowsSeparationAndPacketLimit::DoRun(), FqCoDelQueueDiscDeficit::DoRun(), ns3::aodv::QueueEntryTest::DoRun(), FqCoDelQueueDiscTCPFlowsSeparation::DoRun(), ns3::aodv::AodvRqueueTest::DoRun(), FqCoDelQueueDiscUDPFlowsSeparation::DoRun(), ns3::UdpSocketImpl::DoSendTo(), EpcTftClassifierTestCase::EpcTftClassifierTestCase(), ns3::NscTcpL4Protocol::Receive(), ns3::AnimationInterface::RecursiveIpv4RoutePathSearch(), ns3::ArpL3Protocol::SendArpRequest(), ns3::Icmpv4L4Protocol::SendMessage(), ns3::TcpL4Protocol::SendPacketV4(), ns3::Ipv4RawSocketImpl::SendTo(), ns3::TcpSocketBase::SetupEndpoint(), and ns3::AnimationInterface::TrackIpv4RoutePaths().

◆ SetDontFragment()

void ns3::Ipv4Header::SetDontFragment ( void )

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

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

References DONT_FRAGMENT, m_flags, and NS_LOG_FUNCTION.

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

◆ SetDscp()

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

Set DSCP Field.

Parameters

dscp	DSCP value

Definition at line 89 of file ipv4-header.cc.

References m_tos, and NS_LOG_FUNCTION.

◆ SetEcn()

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

Set ECN Field.

Parameters

ecn ECN Type

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

References m_tos, and NS_LOG_FUNCTION.

Referenced by ns3::Ipv4QueueDiscItem::Mark().

◆ SetFragmentOffset()

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 238 of file ipv4-header.cc.

References m_fragmentOffset, NS_ABORT_MSG_IF, and NS_LOG_FUNCTION.

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