Class: PacketGen::Header::MLDv2::MLR

Inherits:

Base

• Object
• BinStruct::Struct
• Base
• PacketGen::Header::MLDv2::MLR

Defined in:

lib/packetgen/header/mldv2/mlr.rb

Overview

This class supports MLDv2 Multicast Listener Report messages.

From RFC 3810, a MLDv2 Multicast Listener Report message 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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|  Type = 143   |    Reserved   |           Checksum            |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|           Reserved            |Nr of Mcast Address Records (M)|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
.                                                               .
.                  Multicast Address Record [1]                 .
.                                                               .
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                               .                               |
.                               .                               .
|                               .                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
.                                                               .
.                  Multicast Address Record [M]                 .
.                                                               .
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

type, code and checksum are attributes from ICMPv6 header.

MLR attributes are:

• #reserved (BinStruct::Int16),

• #number_of_mar (number of mcast address records, BinStruct::Int16),

• #records (McastAddressRecords).

Author:

• Sylvain Daubert

Since:

• 2.4.0

Instance Attribute Summary

• #number_of_mar ⇒ Integer

  16-bit Number of group records in #records.

• #records ⇒ McastAddressRecords

  Array of Mcast Address Records.

• #reserved ⇒ Object

  16-bit reserved field.

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, #to_s

Constructor Details

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

Instance Attribute Details

#number_of_mar ⇒ Integer

16-bit Number of group records in #records

Returns:

• (Integer)

# File 'lib/packetgen/header/mldv2/mlr.rb', line 56

define_attr :number_of_mar, BinStruct::Int16, default: 0

#records ⇒ McastAddressRecords

Array of Mcast Address Records

Returns:

• (McastAddressRecords)

# File 'lib/packetgen/header/mldv2/mlr.rb', line 61

define_attr :records, McastAddressRecords,
builder: ->(h, t) { t.new(counter: h[:number_of_mar]) }

#reserved ⇒ Object

16-bit reserved field

# File 'lib/packetgen/header/mldv2/mlr.rb', line 52

define_attr :reserved, BinStruct::Int16, default: 0