New returns a new instance of MQTT server with no options.

NewServer returns a new instance of an MQTT broker with optional values where applicable.

Version indicates the current server version.

ErrClientDisconnect indicates that a client disconnected from the server.

ErrClientReconnect indicates that a client attempted to reconnect while still connected.

ErrConnectionFailed indicates that a client connection attempt failed for other reasons.

ErrConnectNotAuthorized indicates that the connection packet had incorrect auth values.

ErrInvalidTopic indicates that the specified topic was not valid.

ErrListenerIDExists indicates that a listener with the same id already exists.

ErrReadConnectInvalid indicates that the connection packet was invalid.

ErrRejectPacket indicates that a packet should be dropped instead of processed.

ErrServerShutdown is propagated when the server shuts down.

ErrSessionReestablished indicates that an existing client was replaced by a newly connected client.

SysTopicInterval is the number of milliseconds between $SYS topic publishes.

Options contains configurable options for the server.

Server is an MQTT broker server.