Package addresses defines the message format that provides the network multi-address of a peer with a given public identity key.

Package intro defines a message type that provides information about an introduction point for a hidden service.

Package load provides a message type that provides information about the current load level of a node identified by its public key.

Package peer provides a message type that provides the base information, identity key and relay rate for an Indra relay.

Package services provides a message type for advertising what kinds of exit services a peer provides to clients, including the port number and the cost per megabyte of data.

Ad is an abstract message that isn't actually used, but rather is composed into the rest being the common fields to all ads.