Struct Lookup 

pub struct Lookup { /* private fields */ }

A running DNS-SD lookup.

Call Self::next to receive resolved ServiceEntry values as they complete; it returns None once every query (browse + resolves) has timed out and the resolver has drained. Resolution progresses while Self::next is awaited — the lookup races the underlying sub-queries concurrently via futures::future::select_all, so the first query with a buffered answer is processed without waiting on the others.

An instance may be yielded more than once as additional addresses resolve (e.g. a late AAAA after the entry was first surfaced on its A address); a later yield for the same ServiceEntry::instance_name supersedes the earlier one. Dropping the Lookup cancels every in-flight sub-query.

Implementations

impl Lookup

pub async fn next(&mut self) -> Option<ServiceEntry>

Wait for the next resolved service instance, or None when the lookup is finished (every sub-query has terminated and the resolver has drained).

The borrow on &mut self matches the single-consumer mailbox contract inherited from Query::next: at most one Self::next is in flight per Lookup.