/// The Aux Data Len field contains the length of the Auxiliary Data field in this Group Record, in bytes (after a translation from 32 bit words length).
/// It may contain zero, to indicate the absence of any auxiliary data.
/// </summary>
publicintAuxiliaryDataLength
{
get{return4*this[Offset.AuxiliaryDataLength];}
}
/// <summary>
/// The Number of Sources (N) field specifies how many source addresses are present in this Group Record.
/// The Auxiliary Data field, if present, contains additional information pertaining to this Group Record.
/// The protocol specified in this document, IGMPv3, does not define any auxiliary data.
/// Therefore, implementations of IGMPv3 MUST NOT include any auxiliary data (i.e., MUST set the Aux Data Len field to zero) in any transmitted Group Record,
/// and MUST ignore any auxiliary data present in any received Group Record.
/// The semantics and internal encoding of the Auxiliary Data field are to be defined by any future version or extension of IGMP that uses this field.
/// A "Current-State Record" is sent by a system in response to a Query received on an interface.
/// It reports the current reception state of that interface, with respect to a single multicast address.
/// <para>
/// MODE_IS_INCLUDE - indicates that the interface has a filter mode of INCLUDE for the specified multicast address.
/// The Source Address [i] fields in this Group Record contain the interface's source list for the specified multicast address, if it is non-empty.
/// </para>
/// </summary>
CurrentStateRecordModeIsInclude=1,
/// <summary>
/// A "Current-State Record" is sent by a system in response to a Query received on an interface.
/// It reports the current reception state of that interface, with respect to a single multicast address.
/// <para>
/// MODE_IS_EXCLUDE - indicates that the interface has a filter mode of EXCLUDE for the specified multicast address.
/// The Source Address [i] fields in this Group Record contain the interface's source list for the specified multicast address, if it is non-empty.
/// </para>
/// </summary>
CurrentStateRecordModeIsExclude=2,
/// <summary>
/// A "Filter-Mode-Change Record" is sent by a system whenever a local invocation of IPMulticastListen causes a change of the filter mode
/// (i.e., a change from INCLUDE to EXCLUDE, or from EXCLUDE to INCLUDE),
/// of the interface-level state entry for a particular multicast address.
/// The Record is included in a Report sent from the interface on which the change occurred.
/// <para>
/// CHANGE_TO_INCLUDE_MODE - indicates that the interface has changed to INCLUDE filter mode for the specified multicast address.
/// The Source Address [i] fields in this Group Record contain the interface's new source list for the specified multicast address, if it is non-empty.
/// </para>
/// </summary>
FilterModeChangeToInclude=3,
/// <summary>
/// A "Filter-Mode-Change Record" is sent by a system whenever a local invocation of IPMulticastListen causes a change of the filter mode
/// (i.e., a change from INCLUDE to EXCLUDE, or from EXCLUDE to INCLUDE),
/// of the interface-level state entry for a particular multicast address.
/// The Record is included in a Report sent from the interface on which the change occurred.
/// <para>
/// CHANGE_TO_EXCLUDE_MODE - indicates that the interface has changed to EXCLUDE filter mode for the specified multicast address.
/// The Source Address [i] fields in this Group Record contain the interface's new source list for the specified multicast address, if it is non-empty.
/// </para>
/// </summary>
FilterModeChangeToExclude=4,
/// <summary>
/// A "Source-List-Change Record" is sent by a system whenever a local invocation of IPMulticastListen causes a change of source list
/// that is *not* coincident with a change of filter mode, of the interface-level state entry for a particular multicast address.
/// The Record is included in a Report sent from the interface on which the change occurred.
/// <para>
/// ALLOW_NEW_SOURCES - indicates that the Source Address [i] fields in this Group Record contain a list of the additional sources
/// that the system wishes to hear from, for packets sent to the specified multicast address.
/// If the change was to an INCLUDE source list, these are the addresses that were added to the list; if the change was to an EXCLUDE source list,
/// these are the addresses that were deleted from the list.
/// </para>
/// <para>
/// If a change of source list results in both allowing new sources and blocking old sources,
/// then two Group Records are sent for the same multicast address, one of type ALLOW_NEW_SOURCES and one of type BLOCK_OLD_SOURCES.
/// </para>
/// </summary>
SourceListChangeAllowNewSources=5,
/// <summary>
/// A "Source-List-Change Record" is sent by a system whenever a local invocation of IPMulticastListen causes a change of source list
/// that is *not* coincident with a change of filter mode, of the interface-level state entry for a particular multicast address.
/// The Record is included in a Report sent from the interface on which the change occurred.
/// <para>
/// BLOCK_OLD_SOURCES - indicates that the Source Address [i] fields in this Group Record contain a list of the sources
/// that the system no longer wishes to hear from, for packets sent to the specified multicast address.
/// If the change was to an INCLUDE source list, these are the addresses that were deleted from the list; if the change was to an EXCLUDE source list,
/// these are the addresses that were added to the list.
/// </para>
/// If a change of source list results in both allowing new sources and blocking old sources,
/// then two Group Records are sent for the same multicast address, one of type ALLOW_NEW_SOURCES and one of type BLOCK_OLD_SOURCES.