a polymophic address class More...

#include <address.h>

Public Types
enum	MaxSize_e { MAX_SIZE = 20 }
	The maximum size of a byte buffer which can be stored in an Address instance. More...

Public Member Functions
	Address ()
	Create an invalid address. More...

	Address (uint8_t type, const uint8_t *buffer, uint8_t len)

	Address (const Address &address)

bool	CheckCompatible (uint8_t type, uint8_t len) const

uint32_t	CopyAllFrom (const uint8_t *buffer, uint8_t len)

uint32_t	CopyAllTo (uint8_t *buffer, uint8_t len) const

uint32_t	CopyFrom (const uint8_t *buffer, uint8_t len)

uint32_t	CopyTo (uint8_t buffer[MAX_SIZE]) const

void	Deserialize (TagBuffer buffer)

uint8_t	GetLength (void) const

uint32_t	GetSerializedSize (void) const
	Get the number of bytes needed to serialize the underlying Address Typically, this is GetLength () + 2. More...

bool	IsInvalid (void) const

bool	IsMatchingType (uint8_t type) const

Address &	operator= (const Address &address)

void	Serialize (TagBuffer buffer) const
	Serialize this address in host byte order to a byte buffer. More...

Static Public Member Functions
static uint8_t	Register (void)
	Allocate a new type id for a new type of address. More...

Private Attributes
uint8_t	m_data [MAX_SIZE]

uint8_t	m_len

uint8_t	m_type

Friends
bool	operator< (const Address &a, const Address &b)

std::ostream &	operator<< (std::ostream &os, const Address &address)

bool	operator== (const Address &a, const Address &b)
	Macro to make help make class an ns-3 attribute. More...

std::istream &	operator>> (std::istream &is, Address &address)

Detailed Description

a polymophic address class

This class is very similar in design and spirit to the BSD sockaddr structure: they are both used to hold multiple types of addresses together with the type of the address.

A new address class defined by a user needs to:

allocate a type id with Address::Register
provide a method to convert his new address to an Address instance. This method is typically a member method named ConvertTo: Address MyAddress::ConvertTo (void) const;
provide a method to convert an Address instance back to an instance of his new address type. This method is typically a static member method of his address class named ConvertFrom: static MyAddress MyAddress::ConvertFrom (const Address &address);
the ConvertFrom method is expected to check that the type of the input Address instance is compatible with its own type.

Typical code to create a new class type looks like:

// this class represents addresses which are 2 bytes long.
class MyAddress
{
public:
  Address ConvertTo (void) const;
  static MyAddress ConvertFrom (void);
private:
  static uint8_t GetType (void);
};
Address MyAddress::ConvertTo (void) const
{
  return Address (GetType (), m_buffer, 2);
}
MyAddress MyAddress::ConvertFrom (const Address &address)
{
  MyAddress ad;
  NS_ASSERT (address.CheckCompatible (GetType (), 2));
  address.CopyTo (ad.m_buffer, 2);
  return ad;
}
uint8_t MyAddress::GetType (void)
{
  static uint8_t type = Address::Register ();
  return type;
}

Definition at line 86 of file address.h.

Member Enumeration Documentation

enum ns3::Address::MaxSize_e

The maximum size of a byte buffer which can be stored in an Address instance.

Enumerator
MAX_SIZE

Definition at line 93 of file address.h.

Constructor & Destructor Documentation

ns3::Address::Address ( )

Create an invalid address.

Definition at line 32 of file address.cc.

References NS_LOG_FUNCTION.

ns3::Address::Address	(	uint8_t	type,
		const uint8_t *	buffer,
		uint8_t	len
	)

Parameters

type	the type of the Address to create
buffer	a pointer to a buffer of bytes which hold a serialized representation of the address in network byte order.
len	the length of the buffer.

Create an address from a type and a buffer. This constructor is typically invoked from the conversion functions of various address types when they have to convert themselves to an Address instance.

Definition at line 41 of file address.cc.

References m_data, m_len, MAX_SIZE, NS_ASSERT, and NS_LOG_FUNCTION.

ns3::Address::Address ( const Address & address )

Definition at line 49 of file address.cc.

References m_data, m_len, MAX_SIZE, and NS_ASSERT.

Member Function Documentation

bool ns3::Address::CheckCompatible	(	uint8_t	type,
		uint8_t	len
	)		const

Parameters

type	a type id as returned by Address::Register
len	the length associated to this type id.

Returns: true if the type of the address stored internally is compatible with the requested type, false otherwise.

Internal:: Mac address type/length detection is discussed in Bug 1568

Definition at line 122 of file address.cc.

References m_len, m_type, MAX_SIZE, NS_ASSERT, and NS_LOG_FUNCTION.

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uint32_t ns3::Address::CopyAllFrom	(	const uint8_t *	buffer,
		uint8_t	len
	)

Parameters

buffer	pointer to a buffer of bytes which contain a copy of all the members of this Address class.
len	the length of the buffer

Returns: the number of bytes copied.

The inverse of CopyAllTo().

See also: CopyAllTo

Definition at line 110 of file address.cc.

References m_data, m_len, m_type, NS_ASSERT, and NS_LOG_FUNCTION.

Referenced by ns3::PacketSocketAddress::ConvertFrom().

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uint32_t ns3::Address::CopyAllTo	(	uint8_t *	buffer,
		uint8_t	len
	)		const

Parameters

buffer	buffer to copy the whole address data structure to
len	the size of the buffer

Returns: the number of bytes copied.

Copies the type to buffer[0], the length of the address internal buffer to buffer[1] and copies the internal buffer starting at buffer[2]. len must be at least the size of the internal buffer plus a byte for the type and a byte for the length.

Definition at line 90 of file address.cc.

References m_data, m_len, m_type, NS_ASSERT, and NS_LOG_FUNCTION.

Referenced by ns3::PacketSocketAddress::ConvertTo().

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uint32_t ns3::Address::CopyFrom	(	const uint8_t *	buffer,
		uint8_t	len
	)

Parameters

buffer	pointer to a buffer of bytes which contain a serialized representation of the address in network byte order.
len	length of buffer

Returns: the number of bytes copied.

Copy the address bytes from buffer into to the internal buffer of this address instance.

Definition at line 101 of file address.cc.

References m_data, m_len, MAX_SIZE, NS_ASSERT, and NS_LOG_FUNCTION.

Referenced by ns3::Icmpv6OptionLinkLayerAddress::Deserialize(), and ns3::ReadFrom().

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uint32_t ns3::Address::CopyTo ( uint8_t buffer[MAX_SIZE] ) const

Parameters

buffer buffer to copy the address bytes to.

Returns: the number of bytes copied.

Definition at line 82 of file address.cc.

References m_data, m_len, NS_ASSERT, and NS_LOG_FUNCTION.

Referenced by ns3::UanAddress::ConvertFrom(), ns3::PacketSocketAddress::ConvertFrom(), ns3::Mac16Address::ConvertFrom(), ns3::Mac64Address::ConvertFrom(), ns3::Mac48Address::ConvertFrom(), ns3::InetSocketAddress::ConvertFrom(), ns3::Inet6SocketAddress::ConvertFrom(), ns3::Ipv4Address::ConvertFrom(), ns3::Ipv6Address::ConvertFrom(), ns3::Icmpv6OptionLinkLayerAddress::Serialize(), and ns3::WriteTo().

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void ns3::Address::Deserialize ( TagBuffer buffer )

Parameters

buffer buffer to read address from

The input address buffer is expected to be in host byte order format.

Definition at line 163 of file address.cc.

References m_data, m_len, m_type, MAX_SIZE, NS_ASSERT, NS_LOG_FUNCTION, ns3::TagBuffer::Read(), and ns3::TagBuffer::ReadU8().

Referenced by ns3::PacketSocketTag::Deserialize(), and ns3::SocketAddressTag::Deserialize().

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uint8_t ns3::Address::GetLength ( void ) const

Returns: the length of the underlying address.

Definition at line 75 of file address.cc.

References m_len, MAX_SIZE, NS_ASSERT, and NS_LOG_FUNCTION.

Referenced by ns3::ArpHeader::GetSerializedSize(), ns3::Icmpv6OptionLinkLayerAddress::Icmpv6OptionLinkLayerAddress(), ns3::operator<(), ns3::Icmpv6L4Protocol::SendRedirection(), ns3::ArpHeader::Serialize(), ns3::Icmpv6OptionLinkLayerAddress::Serialize(), and ns3::WriteTo().

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

Get the number of bytes needed to serialize the underlying Address Typically, this is GetLength () + 2.

Returns: the number of bytes required for an Address in serialized form

Definition at line 147 of file address.cc.

References m_len, and NS_LOG_FUNCTION.

Referenced by ns3::PacketSocketTag::GetSerializedSize(), and ns3::SocketAddressTag::GetSerializedSize().

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bool ns3::Address::IsInvalid ( void ) const

Returns: true if this address is invalid, false otherwise.

An address is invalid if and only if it was created through the default constructor and it was never re-initialized.

Definition at line 68 of file address.cc.

References m_len, m_type, and NS_LOG_FUNCTION.

Referenced by DualStackTestCase::DoRun().

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bool ns3::Address::IsMatchingType ( uint8_t type ) const

Parameters

type	a type id as returned by Address::Register

Returns: true if the type of the address stored internally is compatible with the requested type, false otherwise.

This method checks that the types are exactly equal. This method is really used only by the PacketSocketAddress and there is little point in using it otherwise so, you have been warned: DO NOT USE THIS METHOD.

Definition at line 131 of file address.cc.

References m_type, and NS_LOG_FUNCTION.

Referenced by ns3::PacketSocketAddress::IsMatchingType().

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