Struct TopicAliasRecv 

pub struct TopicAliasRecv { /* private fields */ }

Topic alias manager for receiving MQTT packets

This manages the mapping between numeric aliases and topic names for incoming MQTT PUBLISH packets to reduce packet size for frequently used topics.

Implementations

impl TopicAliasRecv

pub fn new(max_alias: u16) -> Self

Create a new TopicAliasRecv with the specified maximum alias value

pub fn insert_or_update(&mut self, topic: &str, alias: u16)

Insert or update a topic-alias mapping

Parameters

• topic - The topic name (must not be empty)
• alias - The alias value (must be between MIN_ALIAS and max_alias)

Panics

Panics if topic is empty or alias is out of valid range

pub fn get(&self, alias: u16) -> Option<&str>

Get topic by alias

Parameters

• alias - The alias to look up

Returns

The topic name if found, None otherwise

pub fn peek(&self, alias: u16) -> Option<&str>

Peek topic by alias (alias for get, for consistency with TopicAliasSend)

Parameters

• alias - The alias to look up

Returns

The topic name if found, None otherwise

pub fn clear(&mut self)

Clear all topic-alias mappings

pub fn max(&self) -> u16

Get the maximum alias value