class PacketGen::Header::OSPFv2::DbDescription

This class handles {OSPFv2 OSPFv2} DB description packets payload. The DB description 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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|         Interface MTU         |    Options    |0|0|0|0|0|I|M|MS
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                     DD sequence number                        |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
+-                                                             -+
|                                                               |
+-                      An LSA Header                          -+
|                                                               |
+-                                                             -+
|                                                               |
+-                                                             -+
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                              ...                              |

A DB description payload is composed of:

Create a DbDescription payload

# standalone
dbd = PacketGen::Header::OSPFv2::DbDescription.new
# in a packet
pkt = PacketGen.gen('IP', src: source_ip).add('OSPFv2').add('OSPFv2::DbDescription')
# access to DbDescription payload
pkt.ospfv2_dbdescription    # => PacketGen::Header::OSPFv2::DbDescription

DbDescription attributes

dbd.mtu = 1500
# set options. Options may also be set one by one with {#mt_opt},
# {#e_opt}, {#mc_opt}, {#n_opt}, {#l_opt}, {#dc_opt}, {#o_opt} and {#dn_opt}
dbd.options = 0
dbd.flags = 0
dbd.seqnum = 0x800001
# add a LSA Router header
dbd.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
dbd.lsas << existing_lsa.to_lsa_header

@author Sylvain Daubert