Module mdns2 

minimal mDNS service with continuous discovery, record caching, and service registration.

this provides a long-running service that:

• Runs continuous discovery with periodic re-queries
• Caches discovered records with TTL-based expiration
• Registers local services and responds to incoming mDNS queries
• Emits discovery events via a broadcast channel; call MdnsService::subscribe to get an independent event stream per caller, supporting concurrent discovery operations

Structs

CachedRecord

MdnsService

Long-running mDNS service with discovery, caching, and service registration.

RecordCache

Cache of DNS resource records, keyed by “lowercase name, record type”.

ServiceRegistration

Description of a local service to advertise via mDNS.

Enums

MdnsEvent

Events emitted by the mDNS service to the user.