IIgmp¶

module interface IIgmp

Module interface for IGMP modules.

An IGMP module sends notifications about multicast group memberships in hosts, and processes these notifications in multicast routers.

Currently, there are 3 versions specified in RFC 1112 (IGMPv1), RFC 2236 (IGMPv2), and RFC 3376 (IGMPv3).

IGMP packets are transported by the IP layer connected to the ipIn/ipOut gates. Some multicast routing protocols (e.g. DVMRP) also communicate with IGMP messages. They must be connected to the routerIn/routerOut gates, the IGMP module will pass up the unrecognized IGMP packets.

See also: Igmpv2

Inheritance diagram¶

Implemented by¶

Name	Type	Description
Igmpv2	simple module	Implementation of IGMPv2 protocol. Multicast routers use IGMP to learn which groups have members on each of their attached physical networks.
Igmpv3	simple module	Implements IGMPv3 (RFC 3376), the source-filtering version of the Internet Group Management Protocol for IPv4. Beyond plain group membership (see Igmpv2), IGMPv3 lets a host request a group’s traffic while INCLUDING or EXCLUDING a specific set of sources – the basis for Source-Specific Multicast. A single module performs both the host and the multicast-router (querier) role.

Properties¶

Name	Value	Description
display	i=block/cogwheel

Source code¶

//
// Module interface for IGMP modules.
//
// An IGMP module sends notifications about multicast group memberships in hosts,
// and processes these notifications in multicast routers.
//
// Currently, there are 3 versions specified in RFC 1112 (IGMPv1), RFC 2236 (IGMPv2),
// and RFC 3376 (IGMPv3).
//
// IGMP packets are transported by the IP layer connected to the `ipIn`/`ipOut`
// gates. Some multicast routing protocols (e.g. DVMRP) also communicate with
// IGMP messages. They must be connected to the `routerIn`/`routerOut` gates,
// the IGMP module will pass up the unrecognized IGMP packets.
//
// @see ~Igmpv2
//
moduleinterface IIgmp
{
    @display("i=block/cogwheel");

    gates:
        input ipIn @labels(Ipv4ControlInfo/up);
        output ipOut @labels(Ipv4ControlInfo/down);

        input routerIn @labels(Ipv4ControlInfo/up);
        output routerOut @labels(Ipv4ControlInfo/down);
}

File: src/inet/networklayer/ipv4/IIgmp.ned