package net.i2p.router.tunnel
Tunnel messages and the tunnel layer: the TunnelManagerFacade, tunnel build request and reply processing, and the inbound and outbound tunnel structures.
TunnelDispatcher routes each message to the processor for the router's role in the tunnel - inbound gateway or endpoint, outbound gateway or endpoint, or middle hop. Not for use by apps, clients or plugins.
- ClassDescriptionBatching preprocessor that will briefly delay the sending of a message if it doesn't fill up a full tunnel message, in which case it queues up an additional flush task.Honor the 'batchFrequency' tunnel pool setting or the '
router.batchFrequency' router config setting, and track fragmentation.Manage the IV validation for all of the router's tunnels by way of a big decaying bloom filter.Chooses the filter exponent from measured load and the heap budget.IV validator that accepts all initialization vectors without validation.Gather fragments of I2NPMessages at a tunnel endpoint, making them available for reading when complete.Handle fragments at the endpoint of a tunnel, peeling off fully completed I2NPMessages when they arrive, and dropping fragments if they take too long to arrive.Receive messages out of the tunnel endpoint.Defines the general configuration for a hop in a tunnel.Take a received tunnel message, verify that it isn't a duplicate, and translate it into what the next hop will want.Receive the inbound tunnel message, removing all of the layers added by earlier hops to recover the preprocessed data sent by the gateway.Override the hop processor to seed the message with a random IV.Handle messages at the IBGW.When a message arrives at the inbound tunnel endpoint, this distributor honors the instructions (safely).Receive the preprocessed data for an inbound gateway, encrypt it, and forward it on to the first hop.Provide a generic interface for IV validation which may be implemented through something as simple as a hashtable or more a complicated bloom filter.Stores all the state for an unsent or partially-sent message.Turn the preprocessed tunnel data into something that can be delivered to the first hop in the tunnel.When a message arrives at the outbound tunnel endpoint, this distributor honors the instructions.We are the outbound gateway - we created this outbound tunnel.Receive the preprocessed data for an outbound gateway, encrypt all of the layers, and forward it on to the first hop.We are the end of an outbound tunnel that we did not create.Stores all the state for an unsent or partially-sent message.This class represents a tunnel gateway with multiple hops that accepts messages, then coalesces and fragments them before sending them down the tunnel.Accumulates samples of a mean rate stat and emits oneaddRateDataper flush, so a hot path that samples a level once per message or per 1KB fragment pays one stat lookup and one monitor per rate period instead of one per sample.Specialized pumped tunnel gateway for inbound gateways (IBGWs) that throttles messages by checking bandwidth usage before queuing them.Do the simplest thing possible for preprocessing - for each message available, turn it into the minimum number of fragmented preprocessed blocks, sending each of those out.Coordinate the info that the tunnel creator keeps track of, including what peers are in the tunnel and what their configuration isWhy a tunnel that would normally be dropped by the early-expiry gate was instead admitted for one last-chance test.Handle the actual processing and forwarding of messages through the various tunnels.Location in the tunnel for RED (Random Early Discard) logic.Serve as the gatekeeper for a tunnel, accepting messages, coalescing and/or fragmenting them before wrapping them up for tunnel delivery.Interface for preprocessing queued tunnel messages.Interface for receiving encrypted tunnel data.Interface for sending preprocessed tunnel data.TunnelGatewayPumper runs a pool of threads that process PumpedTunnelGateway instances which need messages pushed through preprocessing and sending.Special poison pill PumpedTunnelGateway to signal thread shutdown.No-op receiver for poison pill to avoid null pointer issues.Serve as the gatekeeper for a tunnel with no hops, either inbound or outbound.Participates in a tunnel at an intermediate hop (not gateway or endpoint).