Class: PacketGen::Header::IGMPv3::MR

Inherits:

Base

• Object
• Types::Fields
• Base
• PacketGen::Header::IGMPv3::MR

Defined in:

lib/packetgen/header/igmpv3/mr.rb

Overview

IGMPv3 Membership Report.

This is a subpayload for IGMPv3 packets only. This kind of payload is sent by IP systems to report (to neighboring routers) the current multicast reception state, or changes in the multicast reception state, of their interfaces. Reports have 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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|           Reserved            |  Number of Group Records (M)  |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
.                                                               .
.                        Group Record [1]                       .
.                                                               .
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
.                                                               .
.                        Group Record [2]                       .
.                                                               .
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                               .                               |
.                               .                               .
|                               .                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
.                                                               .
.                        Group Record [M]                       .
.                                                               .
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Author:

• Sylvain Daubert

Since:

• 2.4.0

Instance Attribute Summary

• #group_records ⇒ GroupRecords

  Array of group records.

• #number_of_gr ⇒ Integer

  16-bit Number of group records in #group_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

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

#group_records ⇒ GroupRecords

Array of group records

Returns:

• (GroupRecords)

# File 'lib/packetgen/header/igmpv3/mr.rb', line 61

define_field :group_records, GroupRecords,
builder: ->(h, t) { t.new(counter: h[:number_of_gr]) }

#number_of_gr ⇒ Integer

16-bit Number of group records in #group_records

Returns:

• (Integer)

# File 'lib/packetgen/header/igmpv3/mr.rb', line 56

define_field :number_of_gr, Types::Int16, default: 0

#reserved ⇒ Object

16-bit reserved field

# File 'lib/packetgen/header/igmpv3/mr.rb', line 52

define_field :reserved, Types::Int16, default: 0