Module multicast 

Multicast group management with IGMP/MLD protocol support

Provides IPv4 multicast via IGMPv2 and IPv6 multicast via MLDv2, including group join/leave, periodic report generation, and query response handling.

Structs

GroupState

State of a joined multicast group

IgmpMessage

IGMPv2 message (8 bytes on the wire)

MldAddressRecord

MLDv2 multicast address record

MldMessage

MLDv2 message header

MulticastGroup

IPv4 multicast group identifier

MulticastGroupV6

IPv6 multicast group identifier

MulticastManager

Manages multicast group memberships for IPv4 and IPv6.

Enums

MulticastError

Errors from multicast operations

OutgoingMessage

Outgoing message produced by the manager (for the network layer to send)

Constants

IGMP_LEAVE_GROUP

Leave Group

IGMP_MEMBERSHIP_QUERY

Membership Query

IGMP_MEMBERSHIP_REPORT

IGMPv2 Membership Report

MLD_QUERY

Multicast Listener Query

MLD_RECORD_ALLOW

Source-List-Change: allow new sources

MLD_RECORD_BLOCK

Source-List-Change: block old sources

MLD_RECORD_IS_EX

Current-State Record: Exclude mode

MLD_RECORD_IS_IN

Current-State Record: Include mode

MLD_RECORD_TO_EX

Filter-Mode-Change: to Exclude

MLD_RECORD_TO_IN

Filter-Mode-Change: to Include

MLD_REPORT_V2

MLDv2 Multicast Listener Report

Functions

init

Initialize the global multicast manager.

internet_checksum

Compute the Internet checksum (RFC 1071) over a byte slice.

is_ipv4_multicast

Check if an IPv4 address is in the multicast range (224.0.0.0/4).

is_ipv6_multicast

Check if an IPv6 address is in the multicast range (ff00::/8).

with_manager

Access the global multicast manager.