class PacketGen::Header::OSPFv2::LSAck

This class handles {OSPFv2 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