Class: PacketGen::Header::OSPFv2::LSAck

Inherits:
Base show all
Defined in:
lib/packetgen/header/ospfv2/ls_ack.rb

Overview

This class handles OSPFv2 LS Acknowledgment packets payload. The LS Acknowledgment payload has the following 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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
+-                                                             -+
|                                                               |
+-                      An LSA Header                          -+
|                                                               |
+-                                                             -+
|                                                               |
+-                                                             -+
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                              ...                              |

This paylod is implemented as a unique field: #lsas, which is an ArrayOfLSA object.

Create a LSAck payload

# standalone
lsack = PacketGen::Header::OSPFv2::LSAck.new
# in a packet
pkt = PacketGen.gen('IP', src: source_ip).add('OSPFv2').add('OSPFv2::LSAck')
# access to LSAck payload
lasck = pkt.ospfv2_lsack    # => PacketGen::Header::OSPFv2::LSAck

Adding LSA headers to a LSAck payload

lsack.lsas << { type: 'Router', age: 40, link_state_id: '0.0.0.1', advertising_router: '1.1.1.1', sequence_number: 42, checksum: 0x1234, length: 56 }
# a header may also be set from an existing lsa
lasck.lsas << existing_lsa.to_lsa_header

Author:

  • Sylvain Daubert

Since:

  • 2.5.0

Instance Attribute Summary collapse

Method Summary

Methods inherited from Base

bind, calculate_and_set_length, #header_id, inherited, #initialize, #ip_header, #ll_header

Methods included from PacketGen::Headerable

#added_to_packet, included, #method_name, #packet, #packet=, #parse?, #protocol_name, #read

Methods inherited from Types::Fields

#[], #[]=, #bits_on, define_bit_fields_on, define_field, define_field_after, define_field_before, #fields, fields, inherited, #initialize, #inspect, #offset_of, #optional?, #optional_fields, #present?, #read, remove_bit_fields_on, remove_field, #sz, #to_h, #to_s, update_field

Constructor Details

This class inherits a constructor from PacketGen::Header::Base

Instance Attribute Details

#lsasArrayOfLSA

Array of LSA headers

Returns:


47
# File 'lib/packetgen/header/ospfv2/ls_ack.rb', line 47

define_field :lsas, ArrayOfLSA, builder: ->(_h, t) { t.new(only_headers: true) }