Route Error (RERR) Message Format. More...

#include <aodv-packet.h>

Inheritance diagram for ns3::aodv::RerrHeader:

Collaboration diagram for ns3::aodv::RerrHeader:

Public Member Functions
	RerrHeader ()
	c-tor
bool	AddUnDestination (Ipv4Address dst, uint32_t seqNo)
void	Clear ()
	Clear header.
uint8_t	GetDestCount () const
	Return number of unreachable destinations in RERR message.
bool	operator== (RerrHeader const &o) const
bool	RemoveUnDestination (std::pair< Ipv4Address, uint32_t > &un)
No delete flag
void	SetNoDelete (bool f)
bool	GetNoDelete () const
Public Member Functions inherited from ns3::Header
virtual	~Header ()

Private Attributes
uint8_t	m_flag
	No delete flag.
uint8_t	m_reserved
	Not used.
std::map< Ipv4Address, uint32_t >	m_unreachableDstSeqNo
	List of Unreachable destination: IP addresses and sequence numbers.

Header serialization/deserialization
TypeId	GetInstanceTypeId () const
uint32_t	GetSerializedSize () const
void	Serialize (Buffer::Iterator i) const
uint32_t	Deserialize (Buffer::Iterator start)
void	Print (std::ostream &os) const
static TypeId	GetTypeId ()
	This method returns the TypeId associated to ns3::aodv::RerrHeader.

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

Detailed Description

Route Error (RERR) Message Format.

0                   1                   2                   3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|     Type      |N|          Reserved           |   DestCount   |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|            Unreachable Destination IP Address (1)             |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|         Unreachable Destination Sequence Number (1)           |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-|
|  Additional Unreachable Destination IP Addresses (if needed)  |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Additional Unreachable Destination Sequence Numbers (if needed)|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Definition at line 288 of file aodv-packet.h.

Constructor & Destructor Documentation

ns3::aodv::RerrHeader::RerrHeader ( )

c-tor

Definition at line 490 of file aodv-packet.cc.

Member Function Documentation

bool ns3::aodv::RerrHeader::AddUnDestination	(	Ipv4Address	dst,
		uint32_t	seqNo
	)

Add unreachable node address and its sequence number in RERR header

Returns: false if we already added maximum possible number of unreachable destinations

Definition at line 583 of file aodv-packet.cc.

References GetDestCount(), m_unreachableDstSeqNo, and NS_ASSERT.

Referenced by ns3::aodv::RerrHeaderTest::DoRun(), ns3::aodv::RoutingProtocol::RecvError(), ns3::aodv::RoutingProtocol::SendRerrWhenBreaksLinkToNextHop(), and ns3::aodv::RoutingProtocol::SendRerrWhenNoRouteToForward().

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void ns3::aodv::RerrHeader::Clear ( )

Clear header.

Definition at line 605 of file aodv-packet.cc.

References m_flag, m_reserved, and m_unreachableDstSeqNo.

Referenced by ns3::aodv::RoutingProtocol::RecvError(), and ns3::aodv::RoutingProtocol::SendRerrWhenBreaksLinkToNextHop().

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uint32_t ns3::aodv::RerrHeader::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 534 of file aodv-packet.cc.

References ns3::Buffer::Iterator::GetDistanceFrom(), GetSerializedSize(), m_flag, m_reserved, m_unreachableDstSeqNo, NS_ASSERT, ns3::ReadFrom(), ns3::Buffer::Iterator::ReadNtohU32(), ns3::Buffer::Iterator::ReadU8(), and visualizer.core::start().

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uint8_t ns3::aodv::RerrHeader::GetDestCount ( ) const

inline

Return number of unreachable destinations in RERR message.

Definition at line 322 of file aodv-packet.h.

References m_unreachableDstSeqNo.

Referenced by AddUnDestination(), ns3::aodv::RerrHeaderTest::DoRun(), GetSerializedSize(), operator==(), ns3::aodv::RoutingProtocol::RecvError(), ns3::aodv::RoutingProtocol::SendRerrWhenBreaksLinkToNextHop(), and Serialize().

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TypeId ns3::aodv::RerrHeader::GetInstanceTypeId ( ) 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 508 of file aodv-packet.cc.

References GetTypeId().

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bool ns3::aodv::RerrHeader::GetNoDelete ( ) const

Definition at line 577 of file aodv-packet.cc.

References m_flag.

Referenced by ns3::aodv::RerrHeaderTest::DoRun().

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uint32_t ns3::aodv::RerrHeader::GetSerializedSize ( ) 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 514 of file aodv-packet.cc.

References GetDestCount().

Referenced by Deserialize(), and ns3::aodv::RerrHeaderTest::DoRun().

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TypeId ns3::aodv::RerrHeader::GetTypeId ( void )

static

This method returns the TypeId associated to ns3::aodv::RerrHeader.

No Attributes defined for this type.
No TraceSources defined for this type.

Reimplemented from ns3::Header.

Definition at line 498 of file aodv-packet.cc.

References ns3::TypeId::SetParent().

Referenced by GetInstanceTypeId().

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bool ns3::aodv::RerrHeader::operator== ( RerrHeader const & o ) const

Definition at line 613 of file aodv-packet.cc.

References GetDestCount(), m_flag, m_reserved, and m_unreachableDstSeqNo.

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void ns3::aodv::RerrHeader::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 556 of file aodv-packet.cc.

References m_unreachableDstSeqNo.

Referenced by ns3::aodv::operator<<().

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bool ns3::aodv::RerrHeader::RemoveUnDestination ( std::pair< Ipv4Address, uint32_t > & un )

Delete pair (address + sequence number) from REER header, if the number of unreachable destinations > 0

Returns: true on success

Definition at line 594 of file aodv-packet.cc.

References m_unreachableDstSeqNo.

Referenced by ns3::aodv::RoutingProtocol::RecvError().

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void ns3::aodv::RerrHeader::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 520 of file aodv-packet.cc.

References GetDestCount(), m_flag, m_reserved, m_unreachableDstSeqNo, ns3::Buffer::Iterator::WriteHtonU32(), ns3::WriteTo(), and ns3::Buffer::Iterator::WriteU8().

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