class Lsa

Link State Advertisement (LSA) More...

 
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Detailed Description

Link State Advertisement (LSA)

A generic LSA. All actual LSAs should be derived from this LSA.

typedef ref_ptr<Lsa> LsaRef

LsaRef

A reference counted pointer to an LSA which will be automatically deleted.

 Lsa (OspfTypes::Version version)

Lsa

 Lsa (OspfTypes::Version version, uint8_t *buf, size_t len)

Lsa

Note passing in the LSA buffer does not imply that it will be decoded. The buffer is just being stored.

 ~Lsa ()

~Lsa

[virtual]

OspfTypes::Version  get_version ()

get_version

[const]

uint16_t  get_ls_type ()

get_ls_type

[const pure virtual]

It is the responsibilty of the derived type to return this information.

Returns: The type this lsa represents.

bool  external ()

external

[const virtual]

Returns: True if this is an AS-external-LSA.

bool  type7 ()

type7

[const virtual]

Returns: True if this LSA is a Type-7-LSA.

size_t  min_length ()

min_length

[const pure virtual]

It is the responsibilty of the derived type to return this information.

Returns: The minmum possible length of this LSA.

LsaRef  decode (uint8_t *buf, size_t& len)
throw(BadPacket)

decode

[const pure virtual]

Decode an LSA.

Parameters:

bufpointer to buffer.
lenlength of the buffer on input set to the number of bytes consumed on output.

Returns: A reference to an LSA that manages its own memory.

bool  encode ()

encode

[pure virtual]

Encode an LSA for transmission.

Returns: True on success.

uint8_t * lsa (size_t &len)

lsa

Get a reference to the raw LSA

Parameters:

lenThe length of the LSA.

Returns: pointer to start of the LSA.

bool  available ()

available

[const]

Is a wire format version available?

For all non self orignating LSAs there should be a wire version available.

Self originating LSAs such as Router LSAs can exist that do not yet have any valid fields (no interfaces to describe). Use this field to check if this LSA is available.

Returns: true is a wire format version is available.

Lsa_header&  get_header ()

get_header

bool  valid ()

valid

[const]

Is this LSA valid?

void  invalidate ()

invalidate

Mark this LSA as invalid and clear the timer.

bool  get_self_originating ()

get_self_originating

[const]

Returns: true of this is a self originating LSA.

void  set_self_originating (bool orig)

set_self_originating

Set the state of this LSA with respect to self originating or not.

void  record_creation_time (TimeVal now)

record_creation_time

Record the time of creation and initial age.

Parameters:

nowthe current time.
void  get_creation_time (TimeVal& now)

get_creation_time

Get arrival time.

Parameters:

nowout parameter which will be contain the time the LSA arrived.
void  revive (const TimeVal& now)

revive

Revive an LSA that is at MaxAge and MaxSequenceNumber. The age is taken back to zero and sequence number InitialSequenceNumber.

void  update_age_and_seqno (const TimeVal& now)

update_age_and_seqno

Update the age and sequence number of a self originated LSAs. Plus encode.

void  update_age (TimeVal now)

update_age

Update the age field based on the current time.

Parameters:

nowthe current time.
void  update_age_inftransdelay (uint8_t *ptr, uint16_t inftransdelay)

update_age_inftransdelay

[static]

Increment the age field of an LSA by inftransdelay.

Parameters:

ptrto the age field, first field in a LSA.
inftransdelaydelay to add in seconds.
void  set_maxage ()

set_maxage

Set the age to MaxAge.

bool  maxage ()

maxage

[const]

Is the age of this LSA MaxAge.

bool  max_sequence_number ()

max_sequence_number

[const]

Is the LS Sequence Number MaxSequenceNumber?

int32_t  get_ls_sequence_number ()

get_ls_sequence_number

[const]

Get the LS Sequence Number.

void  set_ls_sequence_number (int32_t seqno)

set_ls_sequence_number

Set the LS Sequence Number.

void  increment_sequence_number ()

increment_sequence_number

Increment sequence number.

void  add_nack (OspfTypes::NeighbourID nid)

add_nack

Add a neighbour ID to the NACK list.

void  remove_nack (OspfTypes::NeighbourID nid)

remove_nack

Remove a neighbour ID from the NACK list.

bool  exists_nack (OspfTypes::NeighbourID nid)

exists_nack

Does this neighbour exist on the NACK list.

bool  empty_nack ()

empty_nack

[const]

If the NACK list is empty return true. All of the neighbours have now nacked this LSA.

bool  get_transmitted ()

get_transmitted

Returns: true if this LSA has been transmitted.

void  set_transmitted (bool t)

set_transmitted

Set the transmitted state of this LSA.

XorpTimer&  get_timer ()

get_timer

Get a reference to the internal timer.

void  set_tracing (bool trace)

set_tracing

bool  tracing ()

tracing

[const]

const char * name ()

name

[const pure virtual]

Printable name of this LSA.

string  str ()

str

[const pure virtual]

Generate a printable representation of the LSA.

Lsa_header _header

_header

[protected]

vector<uint8_t> _pkt

_pkt

[protected]


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