Crate quicr[−][src]
QUIC transport protocol support for Tokio
QUIC is a modern transport protocol addressing shortcomings of TCP, such as head-of-line blocking, poor security, slow handshakes, and inefficient congestion control. This crate provides a portable userspace implementation.
The entry point of this crate is the Endpoint
.
The futures and streams defined in this crate are not Send
because they necessarily share state with eachother. As
a result, they must be spawned on a single-threaded tokio runtime.
let mut runtime = tokio::runtime::current_thread::Runtime::new().unwrap(); let mut builder = quicr::Endpoint::new(); // <configure builder> let (endpoint, driver, _) = builder.bind("[::]:0").unwrap(); runtime.spawn(driver.map_err(|e| panic!("IO error: {}", e))); // ...
About QUIC
A QUIC connection is an association between two endpoints. The endpoint which initiates the connection is termed the client, and the endpoint which accepts it is termed the server. A single endpoint may function as both client and server for different connections, for example in a peer-to-peer application. To communicate application data, each endpoint may open streams up to a limit dictated by its peer. Typically, that limit is increased as old streams are finished.
Streams may be unidirectional or bidirectional, and are cheap to create and disposable. For example, a traditionally datagram-oriented application could use a new stream for every message it wants to send, no longer needing to worry about MTUs. Bidirectional streams behave much like a traditional TCP connection, and are useful for sending messages that have an immediate response, such as an HTTP request. Stream data is delivered reliably, and there is no ordering enforced between data on different streams.
By avoiding head-of-line blocking and providing unified congestion control across all streams of a connection, QUIC is able to provide higher throughput and lower latency than one or multiple TCP connections between the same two hosts, while providing more useful behavior than raw UDP sockets.
QUIC uses encryption and identity verification built directly on TLS 1.3. Just as with a TLS server, it is useful for a QUIC server to be identified by a certificate signed by a trusted authority. If this is infeasible--for example, if servers are short-lived or not associated with a domain name--then as with TLS, self-signed certificates can be used to provide encryption alone.
Structs
ClientConfig | |
Config |
Parameters governing the core QUIC state machine. |
Connection |
A QUIC connection. |
ConnectionId |
Protocol-level identifier for a connection. |
Driver |
A future that drives IO on an endpoint. |
Endpoint |
A QUIC endpoint. |
EndpointBuilder |
A helper for constructing an |
IncomingSessionTickets |
A stream of session tickets supplied by the server. |
IncomingStreams |
A stream of QUIC streams initiated by a remote peer. |
ListenKeys |
Information that should be preserved between restarts for server endpoints. |
NewClientConnection |
A connection initiated locally. |
NewConnection |
A connection initiated by a remote client. |
ReadToEnd |
Future produced by |
RecvStream |
A stream that can only be used to receive data |
SendStream |
A stream that can only be used to send data |
Stream |
A stream that supports both sending and receiving data |
Enums
ConnectError | |
ConnectionError |
Reasons why a connection might be lost. |
Error |
Errors that can occur during the construction of an |
NewStream |
A stream initiated by a remote peer. |
ReadError |
Errors that arise from reading from a stream. |
WriteError |
Errors that arise from writing to a stream |
Traits
Read |
Trait of readable streams |
Write |
Trait of writable streams |
Functions
read_to_end |
Uses unordered reads to be more efficient than using |
Type Definitions
Incoming |
Stream of incoming connections. |