A Discrete-Event Network Simulator
API
ns3::Ipv4Header Class Reference

Packet header for IPv4. More...

#include "ipv4-header.h"

+ Inheritance diagram for ns3::Ipv4Header:
+ Collaboration 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 codepoints. 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...
 

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

DiffServ codepoints.

The values correspond to the 6-bit DSCP codepoint within the 8-bit DS field defined in {2474}. ECN bits are separately set with the SetEcn() method. Codepoints are defined in Assured Forwarding (AF) RFC 2597, Expedited Forwarding (EF) RFC 2598, and 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 70 of file ipv4-header.h.

◆ EcnType

ECN Type defined in RFC 3168

Enumerator
ECN_NotECT 
ECN_ECT1 
ECN_ECT0 
ECN_CE 

Definition at line 112 of file ipv4-header.h.

◆ FlagsE

flags related to IP fragmentation

Enumerator
DONT_FRAGMENT 
MORE_FRAGMENTS 

Definition at line 244 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
startan 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().

+ Here is the call graph for this function:
+ Here is the caller graph for this function:

◆ DscpTypeToString()

std::string ns3::Ipv4Header::DscpTypeToString ( DscpType  dscp) const
Parameters
dscpthe 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().

+ Here is the caller graph for this function:

◆ EcnTypeToString()

std::string ns3::Ipv4Header::EcnTypeToString ( EcnType  ecn) const
Parameters
ecnthe 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().

+ Here is the caller graph for this function:

◆ 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().

+ Here is the caller graph for this function:

◆ 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::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::Ipv4L3Protocol::Receive(), ns3::UdpL4Protocol::Receive(), ns3::TcpL4Protocol::Receive(), ns3::dsr::DsrRouting::Receive(), ns3::EpcPgwApplication::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(), ns3::Ipv4RawSocketImpl::SendTo(), and ns3::Ipv4L3Protocol::UpdateDuplicate().

◆ 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().

+ Here is the caller graph for this function:

◆ 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().

+ Here is the caller graph for this function:

◆ GetFragmentOffset()

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

◆ 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(), ns3::Ipv4L3Protocol::ProcessFragment(), and ns3::Ipv4L3Protocol::UpdateDuplicate().

+ Here is the caller graph for this function:

◆ 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.

+ Here is the call graph for this 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().

+ Here is the caller graph for this function:

◆ GetProtocol()

◆ GetSerializedSize()

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

◆ 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(), IcmpTimeExceedTestCase::ReceivePkt(), 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(), ns3::Ipv4RawSocketImpl::SendTo(), and ns3::Ipv4L3Protocol::UpdateDuplicate().

+ Here is the caller graph for this function:

◆ GetTos()

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

◆ GetTtl()

◆ 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().

+ Here is the call graph for this function:
+ Here is the caller graph for this function:

◆ 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().

+ Here is the caller graph for this function:

◆ 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(), ns3::Ipv4L3Protocol::ProcessFragment(), and ns3::Ipv4L3Protocol::UpdateDuplicate().

+ Here is the caller graph for this function:

◆ Print()

void ns3::Ipv4Header::Print ( std::ostream &  os) const
virtual
Parameters
osoutput 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().

+ Here is the call graph for this function:
+ Here is the caller graph for this function:

◆ Serialize()

void ns3::Ipv4Header::Serialize ( Buffer::Iterator  start) const
virtual
Parameters
startan 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().

+ Here is the call graph for this function:
+ Here is the caller graph for this function:

◆ SetDestination()

◆ 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().

+ Here is the caller graph for this function:

◆ SetDscp()

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

Set DSCP Field.

Parameters
dscpDSCP 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
ecnECN Type

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

References m_tos, and NS_LOG_FUNCTION.

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

+ Here is the caller graph for this function:

◆ 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
offsetBytesthe 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().

+ Here is the caller graph for this function:

◆ SetIdentification()

void ns3::Ipv4Header::SetIdentification ( uint16_t  identification)
Parameters
identificationthe Identification field of IPv4 packets.

By default, set to zero.

Definition at line 75 of file ipv4-header.cc.

References m_identification, and NS_LOG_FUNCTION.

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

+ Here is the caller graph for this function:

◆ SetLastFragment()

void ns3::Ipv4Header::SetLastFragment ( void  )

This packet is the last packet of a fragmented ipv4 packet.

Definition at line 206 of file ipv4-header.cc.

References m_flags, MORE_FRAGMENTS, and NS_LOG_FUNCTION.

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

+ Here is the caller graph for this function:

◆ SetMayFragment()

void ns3::Ipv4Header::SetMayFragment ( void  )

If you need to fragment this packet, you can do it.

Definition at line 225 of file ipv4-header.cc.

References DONT_FRAGMENT, m_flags, and NS_LOG_FUNCTION.

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

+ Here is the caller graph for this function:

◆ SetMoreFragments()

void ns3::Ipv4Header::SetMoreFragments ( void  )

This packet is not the last packet of a fragmented ipv4 packet.

Definition at line 200 of file ipv4-header.cc.

References m_flags, MORE_FRAGMENTS, and NS_LOG_FUNCTION.

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

+ Here is the caller graph for this function:

◆ SetPayloadSize()

◆ SetProtocol()

◆ SetSource()

◆ SetTos()

void ns3::Ipv4Header::SetTos ( uint8_t  tos)
Parameters
tosthe 8 bits of Ipv4 TOS.

Definition at line 82 of file ipv4-header.cc.

References m_tos, and NS_LOG_FUNCTION.

Referenced by ns3::Ipv4L3Protocol::BuildHeader(), and EpcTftClassifierTestCase::EpcTftClassifierTestCase().

+ Here is the caller graph for this function:

◆ SetTtl()

void ns3::Ipv4Header::SetTtl ( uint8_t  ttl)

Member Data Documentation

◆ m_calcChecksum

bool ns3::Ipv4Header::m_calcChecksum
private

true if the checksum must be calculated

Definition at line 249 of file ipv4-header.h.

Referenced by Deserialize(), EnableChecksum(), and Serialize().

◆ m_checksum

uint16_t ns3::Ipv4Header::m_checksum
private

checksum

Definition at line 260 of file ipv4-header.h.

Referenced by Deserialize().

◆ m_destination

Ipv4Address ns3::Ipv4Header::m_destination
private

destination address

Definition at line 259 of file ipv4-header.h.

Referenced by Deserialize(), GetDestination(), Print(), Serialize(), and SetDestination().

◆ m_flags

uint32_t ns3::Ipv4Header::m_flags
private

◆ m_fragmentOffset

uint16_t ns3::Ipv4Header::m_fragmentOffset
private

Fragment offset.

Definition at line 257 of file ipv4-header.h.

Referenced by Deserialize(), GetFragmentOffset(), Print(), Serialize(), and SetFragmentOffset().

◆ m_goodChecksum

bool ns3::Ipv4Header::m_goodChecksum
private

true if checksum is correct

Definition at line 261 of file ipv4-header.h.

Referenced by Deserialize(), and IsChecksumOk().

◆ m_headerSize

uint16_t ns3::Ipv4Header::m_headerSize
private

IP header size.

Definition at line 262 of file ipv4-header.h.

Referenced by Deserialize(), and GetSerializedSize().

◆ m_identification

uint16_t ns3::Ipv4Header::m_identification
private

identification

Definition at line 252 of file ipv4-header.h.

Referenced by Deserialize(), GetIdentification(), Print(), Serialize(), and SetIdentification().

◆ m_payloadSize

uint16_t ns3::Ipv4Header::m_payloadSize
private

payload size

Definition at line 251 of file ipv4-header.h.

Referenced by Deserialize(), GetFragmentOffset(), GetPayloadSize(), Print(), Serialize(), and SetPayloadSize().

◆ m_protocol

uint32_t ns3::Ipv4Header::m_protocol
private

Protocol.

Definition at line 255 of file ipv4-header.h.

Referenced by Deserialize(), GetProtocol(), Print(), Serialize(), and SetProtocol().

◆ m_source

Ipv4Address ns3::Ipv4Header::m_source
private

source address

Definition at line 258 of file ipv4-header.h.

Referenced by Deserialize(), GetSource(), Print(), Serialize(), and SetSource().

◆ m_tos

uint32_t ns3::Ipv4Header::m_tos
private

TOS, also used as DSCP + ECN value.

Definition at line 253 of file ipv4-header.h.

Referenced by Deserialize(), GetDscp(), GetEcn(), GetTos(), Print(), Serialize(), SetDscp(), SetEcn(), and SetTos().

◆ m_ttl

uint32_t ns3::Ipv4Header::m_ttl
private

TTL.

Definition at line 254 of file ipv4-header.h.

Referenced by Deserialize(), GetTtl(), Print(), Serialize(), and SetTtl().


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