MldMessage¶

Namespace: inet

class MldMessage

Base class for MLDv1 messages (RFC 2710). Carried as ICMPv6 type 130 (Query), 131 (Report), 132 (Done). Inherits type, chksum, and checksumMode from Icmpv6Header.

Usage diagram¶

Inheritance diagram¶

Extends¶

Name	Type	Description
Icmpv6Header	class	Represents an ICMPv6 packet.

Known subclasses¶

Name	Type	Description
MldDone	class	MLDv1 Multicast Listener Done (RFC 2710, ICMPv6 type 132).
MldQuery	class	MLDv1 Multicast Listener Query (RFC 2710, ICMPv6 type 130). General query: multicastAddress = :: Group-specific query: multicastAddress = group address
MldReport	class	MLDv1 Multicast Listener Report (RFC 2710, ICMPv6 type 131).
Mldv2Query	class	MLDv2 Multicast Listener Query (RFC 3810 §5.1, ICMPv6 type 130).

Fields¶

Name	Type	Description
id	int
mutable	bool
complete	bool
correct	bool
properlyRepresented	bool
chunkLength	b
rawBin	string[]
rawHex	string[]
regionTags	SharingRegionTagSet::TagBaseRegionTag[]
chunkLength
type	Icmpv6Type	1 byte int code; // 1 byte //TODO this should be specific to different ICMP types.
chksum	int	2 bytes
checksumMode	ChecksumMode	4 bytes ‘type’ specific values
code	int	always 0 for MLD (RFC 2710 §3)
maxRespDelay	uint16_t	Maximum Response Delay, ms (16 bits)
reserved	uint16_t	reserved (16 bits, must be 0)
multicastAddress	Ipv6Address	128-bit multicast group address

Properties¶

Name	Value	Description
beforeChange	handleChange()
descriptor	readonly
existingClass
packetData

Source code¶

//
// Base class for MLDv1 messages (RFC 2710).
// Carried as ICMPv6 type 130 (Query), 131 (Report), 132 (Done).
// Inherits type, chksum, and checksumMode from Icmpv6Header.
//
class MldMessage extends Icmpv6Header
{
    int code = 0;                       // always 0 for MLD (RFC 2710 §3)
    uint16_t maxRespDelay = 0;          // Maximum Response Delay, ms (16 bits)
    uint16_t reserved = 0;              // reserved (16 bits, must be 0)
    Ipv6Address multicastAddress;       // 128-bit multicast group address
}

File: src/inet/networklayer/icmpv6/MldMessage.msg