Dwm::MplsLabel Class Reference

Encapsulates an MPLS label. More...

#include <DwmMplsLabel.hh>

Inheritance diagram for Dwm::MplsLabel:

Collaboration diagram for Dwm::MplsLabel:

Public Member Functions
	MplsLabel ()
	Constructor. Sets all label bits to 0.
	MplsLabel (const std::string &s)
	Construct from a string of the form 'label:exp:s:ttl'.
uint32_t	Label () const
	Returns the 20-bit label portion of the label.
uint32_t	Label (uint32_t label)
	Sets and returns the 20-bit label portion of the label.
uint8_t	Exp () const
	Returns the 3-bit exp portion of the label.
uint8_t	Exp (uint8_t exp)
	Sets and returns the 3-bit exp portion of the label.
bool	S () const
	Returns true if the S (bottom-of-stack) bit is set.
bool	S (bool s)
	Sets the S bit.
uint8_t	Ttl () const
	Returns the TTL portion of the label.
uint8_t	Ttl (uint8_t ttl)
	Sets and returns the TTL portion of the label.
bool	operator== (const MplsLabel &label) const
	operator ==
std::istream &	Read (std::istream &is)
	Reads the MPLS label from an istream. Returns the istream.
std::ostream &	Write (std::ostream &os) const
	Writes the MPLS label to an ostream. Returns the ostream.
ssize_t	Read (int fd)
	Reads the MPLS label from a file descriptor. More...
ssize_t	Write (int fd) const
	Writes the MPLS label to a file descriptor. More...
size_t	Read (FILE *f)
	Reads the MPLS label from a FILE. More...
size_t	Write (FILE *f) const
	Writes the MPLS label to a FILE. More...
int	Read (gzFile gzf)
	Reads the MPLS label from the given gzFile gzf. More...
int	Write (gzFile gzf) const
	Writes the MPLS lable to the given gzFile gzf. More...
int	BZRead (BZFILE *bzf)
	Reads the MPLS label from the given BZFILE bzf. More...
int	BZWrite (BZFILE *bzf) const
	Writes the MPLS lable to the given BZFILE bzf. More...
uint32_t	StreamedLength () const
	Returns the number of bytes that should be written if we call one of the Write() members. More...
Public Member Functions inherited from Dwm::Readable
virtual	~Readable ()
	destructor
Public Member Functions inherited from Dwm::Writable
virtual	~Writable ()
	Destructor.
Public Member Functions inherited from Dwm::GZReadable
virtual	~GZReadable ()
	destructor
Public Member Functions inherited from Dwm::GZWritable
virtual	~GZWritable ()
	destructor

Protected Attributes
uint32_t	_data

Friends
std::ostream &	operator<< (std::ostream &os, const MplsLabel &label)
	Prints to an ostream in 'label:exp:s:ttl' format.
std::istream &	operator>> (std::istream &is, MplsLabel &label)
	Reads from an istream in 'label:exp:s:ttl' format.

Detailed Description

Encapsulates an MPLS label.

Member Function Documentation

BZRead()

int Dwm::MplsLabel::BZRead ( BZFILE *  bzf )

virtual

Reads the MPLS label from the given BZFILE bzf.

Return the number of bytes read on success, -1 on failure.

Implements Dwm::BZ2Readable.

BZWrite()

int Dwm::MplsLabel::BZWrite ( BZFILE *  bzf ) const

virtual

Writes the MPLS lable to the given BZFILE bzf.

Returns the number of bytes written on success, -1 on failure.

Implements Dwm::BZ2Writable.

Read() [1/3]

ssize_t Dwm::MplsLabel::Read ( int  fd )

virtual

Reads the MPLS label from a file descriptor.

Returns the number of bytes read on success (should be 4), -1 on failure.

Implements Dwm::Readable.

Read() [2/3]

size_t Dwm::MplsLabel::Read ( FILE *  f )

virtual

Reads the MPLS label from a FILE.

Returns 1 on success, 0 on failure (fread() semantics).

Implements Dwm::Readable.

Read() [3/3]

int Dwm::MplsLabel::Read ( gzFile  gzf )

virtual

Reads the MPLS label from the given gzFile gzf.

Return the number of bytes read on success, -1 on failure.

Implements Dwm::GZReadable.

StreamedLength()

uint32_t Dwm::MplsLabel::StreamedLength ( ) const

virtual

Returns the number of bytes that should be written if we call one of the Write() members.

Should always return 4.

Implements Dwm::Writable.

Write() [1/3]

ssize_t Dwm::MplsLabel::Write ( int  fd ) const

virtual

Writes the MPLS label to a file descriptor.

Returns the number of bytes written on success (should be 4), -1 on failure.

Implements Dwm::Writable.

Write() [2/3]

size_t Dwm::MplsLabel::Write ( FILE *  f ) const

virtual

Writes the MPLS label to a FILE.

Returns 1 on success, 0 on failure (fwrite() semantics).

Implements Dwm::Writable.

Write() [3/3]

int Dwm::MplsLabel::Write ( gzFile  gzf ) const

virtual

Writes the MPLS lable to the given gzFile gzf.

Returns the number of bytes written on success, -1 on failure.

Implements Dwm::GZWritable.

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

• DwmMplsLabel.hh