# QUIC Multi-Stream Crate Architecture
**Crate Name**: `quic-multistream`
**Version**: 0.1.0
**Status**: Design Phase
**Authors**: rUv Development Team
**Last Updated**: 2025-10-26
---
## Table of Contents
1. [Executive Summary](#executive-summary)
2. [Architecture Overview](#architecture-overview)
3. [Crate Structure](#crate-structure)
4. [Core Abstractions](#core-abstractions)
5. [Platform-Specific Implementations](#platform-specific-implementations)
6. [Integration Points](#integration-points)
7. [Dependencies](#dependencies)
8. [API Design](#api-design)
9. [Performance Targets](#performance-targets)
10. [Testing Strategy](#testing-strategy)
11. [Security Considerations](#security-considerations)
12. [Implementation Roadmap](#implementation-roadmap)
---
## Executive Summary
The `quic-multistream` crate provides a unified, cross-platform abstraction for QUIC multiplexed streaming that works seamlessly across native Rust (using `quinn`) and WebAssembly (using `WebTransport` API). This crate is a critical component of the MidStream Lean Agentic Learning System, enabling ultra-low-latency, multiplexed communication for distributed agent coordination.
### Key Features
- **Unified API**: Single API surface across native and WASM targets
- **Zero-Copy Streaming**: Efficient data transfer with minimal overhead
- **Multi-Stream Multiplexing**: 1000+ concurrent streams per connection
- **0-RTT Connection**: Sub-millisecond reconnection latency
- **Stream Prioritization**: Fine-grained control over stream urgency
- **Type-Safe**: Leverages Rust's type system for correctness
- **Production-Ready**: Comprehensive error handling and observability
### Design Principles
1. **Platform Abstraction**: Hide platform differences behind clean traits
2. **Performance First**: Zero-cost abstractions, minimal allocations
3. **Type Safety**: Compile-time guarantees for protocol correctness
4. **Observability**: Built-in metrics and tracing support
5. **Testability**: Mockable interfaces for comprehensive testing
---
## Architecture Overview
```
┌─────────────────────────────────────────────────────────────────┐
│ quic-multistream Crate │
├─────────────────────────────────────────────────────────────────┤
│ │
│ ┌──────────────────────────────────────────────────────────┐ │
│ │ Public API (Unified Traits) │ │
│ │ QuicConnection, QuicStream, QuicServer, QuicClient │ │
│ └────────────────────┬─────────────────────────────────────┘ │
│ │ │
│ ┌───────────────┴──────────────────┐ │
│ │ │ │
│ ┌────▼─────────────┐ ┌─────────▼──────────┐ │
│ │ Native Backend │ │ WASM Backend │ │
│ │ (quinn-based) │ │ (WebTransport) │ │
│ ├──────────────────┤ ├────────────────────┤ │
│ │ - quinn 0.11 │ │ - web-sys │ │
│ │ - rustls 0.23 │ │ - wasm-bindgen │ │
│ │ - tokio 1.42 │ │ - js-sys │ │
│ │ - rcgen 0.13 │ │ - wasm-bindgen- │ │
│ │ │ │ futures 0.4 │ │
│ └──────────────────┘ └────────────────────┘ │
│ │
│ ┌──────────────────────────────────────────────────────────┐ │
│ │ Common Infrastructure │ │
│ │ - Error Types │ │
│ │ - Configuration │ │
│ │ - Metrics & Tracing │ │
│ │ - Buffer Management │ │
│ │ - Stream Prioritization │ │
│ └──────────────────────────────────────────────────────────┘ │
│ │
└─────────────────────────────────────────────────────────────────┘
│
▼
┌──────────────────────┐
│ Lean Agentic System │
│ Integration Layer │
└──────────────────────┘
```
---
## Crate Structure
### Directory Layout
```
crates/quic-multistream/
├── Cargo.toml # Crate manifest with feature flags
├── README.md # Crate documentation
├── LICENSE # MIT license
├── src/
│ ├── lib.rs # Crate root, re-exports
│ ├── error.rs # Error types
│ ├── config.rs # Configuration types
│ ├── connection.rs # QuicConnection trait and types
│ ├── stream.rs # QuicStream trait and types
│ ├── server.rs # QuicServer trait and types
│ ├── client.rs # QuicClient trait and types
│ ├── priority.rs # Stream priority management
│ ├── metrics.rs # Metrics and observability
│ ├── buffer.rs # Buffer pool and management
│ │
│ ├── native/ # Native (quinn) implementation
│ │ ├── mod.rs # Native module root
│ │ ├── connection.rs # quinn::Connection wrapper
│ │ ├── stream.rs # quinn::Stream wrapper
│ │ ├── server.rs # quinn::Endpoint server
│ │ ├── client.rs # quinn::Endpoint client
│ │ ├── tls.rs # TLS/rustls configuration
│ │ └── transport.rs # Transport configuration
│ │
│ ├── wasm/ # WASM (WebTransport) implementation
│ │ ├── mod.rs # WASM module root
│ │ ├── connection.rs # WebTransport session wrapper
│ │ ├── stream.rs # WebTransport stream wrapper
│ │ ├── client.rs # WebTransport client
│ │ └── bindings.rs # JavaScript bindings
│ │
│ └── util/ # Shared utilities
│ ├── mod.rs
│ ├── async_utils.rs # Async helpers
│ └── frame.rs # Frame encoding/decoding
│
├── tests/
│ ├── integration_tests.rs # Cross-platform integration tests
│ ├── native_tests.rs # Native-specific tests
│ └── wasm_tests.rs # WASM-specific tests
│
├── benches/
│ ├── throughput.rs # Throughput benchmarks
│ ├── latency.rs # Latency benchmarks
│ └── concurrent_streams.rs # Multi-stream benchmarks
│
└── examples/
├── echo_server.rs # Simple echo server
├── echo_client.rs # Simple echo client
├── multistream_demo.rs # Multiple streams demo
├── prioritized_streams.rs # Stream priority demo
└── wasm_client.rs # WASM client example
```
### File Responsibilities
| `lib.rs` | ~150 | Public API re-exports, feature flags |
| `error.rs` | ~100 | Error types with thiserror |
| `config.rs` | ~200 | Configuration structs |
| `connection.rs` | ~300 | Connection trait and common types |
| `stream.rs` | ~250 | Stream traits and abstractions |
| `server.rs` | ~200 | Server trait and builder |
| `client.rs` | ~200 | Client trait and builder |
| `priority.rs` | ~150 | Priority queue and scheduling |
| `metrics.rs` | ~180 | Metrics collection and reporting |
| `buffer.rs` | ~220 | Buffer pool implementation |
| `native/connection.rs` | ~400 | quinn connection implementation |
| `native/stream.rs` | ~350 | quinn stream implementation |
| `native/server.rs` | ~300 | quinn server implementation |
| `native/client.rs` | ~280 | quinn client implementation |
| `native/tls.rs` | ~250 | TLS configuration |
| `wasm/connection.rs` | ~380 | WebTransport session implementation |
| `wasm/stream.rs` | ~320 | WebTransport stream implementation |
| `wasm/client.rs` | ~250 | WebTransport client implementation |
| **Total Production** | **~4,280 LOC** | **Core implementation** |
---
## Core Abstractions
### 1. QuicConnection Trait
The central abstraction representing a QUIC connection.
```rust
/// A QUIC connection that can open multiple streams
#[async_trait]
pub trait QuicConnection: Send + Sync {
/// Open a bidirectional stream
async fn open_bi_stream(&self) -> Result<Box<dyn QuicBiStream>, QuicError>;
/// Open a unidirectional stream
async fn open_uni_stream(&self) -> Result<Box<dyn QuicSendStream>, QuicError>;
/// Accept an incoming bidirectional stream
async fn accept_bi_stream(&self) -> Result<Box<dyn QuicBiStream>, QuicError>;
/// Accept an incoming unidirectional stream
async fn accept_uni_stream(&self) -> Result<Box<dyn QuicRecvStream>, QuicError>;
/// Open a bidirectional stream with priority
async fn open_bi_stream_with_priority(
&self,
priority: StreamPriority,
) -> Result<Box<dyn QuicBiStream>, QuicError>;
/// Send an unreliable datagram
async fn send_datagram(&self, data: Bytes) -> Result<(), QuicError>;
/// Receive an unreliable datagram
async fn recv_datagram(&self) -> Result<Bytes, QuicError>;
/// Get connection statistics
fn stats(&self) -> ConnectionStats;
/// Get connection ID
fn id(&self) -> ConnectionId;
/// Check if connection is closed
fn is_closed(&self) -> bool;
/// Close the connection gracefully
async fn close(&self, error_code: u64, reason: &[u8]) -> Result<(), QuicError>;
/// Get remote address
fn remote_address(&self) -> Result<SocketAddr, QuicError>;
/// Get local address
fn local_address(&self) -> Result<SocketAddr, QuicError>;
}
```
### 2. QuicStream Traits
Stream abstractions for different stream types.
```rust
/// A bidirectional QUIC stream
#[async_trait]
pub trait QuicBiStream: Send + Sync {
/// Write data to the stream
async fn write(&mut self, data: &[u8]) -> Result<usize, QuicError>;
/// Write all data to the stream
async fn write_all(&mut self, data: &[u8]) -> Result<(), QuicError>;
/// Read data from the stream
async fn read(&mut self, buf: &mut [u8]) -> Result<usize, QuicError>;
/// Read exact amount of data
async fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), QuicError>;
/// Finish writing (send FIN)
async fn finish(&mut self) -> Result<(), QuicError>;
/// Set stream priority
fn set_priority(&mut self, priority: StreamPriority);
/// Get stream ID
fn id(&self) -> StreamId;
/// Get stream statistics
fn stats(&self) -> StreamStats;
/// Split into send and receive halves
fn split(self: Box<Self>) -> (Box<dyn QuicSendStream>, Box<dyn QuicRecvStream>);
}
/// A send-only QUIC stream
#[async_trait]
pub trait QuicSendStream: Send + Sync {
async fn write(&mut self, data: &[u8]) -> Result<usize, QuicError>;
async fn write_all(&mut self, data: &[u8]) -> Result<(), QuicError>;
async fn finish(&mut self) -> Result<(), QuicError>;
fn set_priority(&mut self, priority: StreamPriority);
fn id(&self) -> StreamId;
fn stats(&self) -> StreamStats;
}
/// A receive-only QUIC stream
#[async_trait]
pub trait QuicRecvStream: Send + Sync {
async fn read(&mut self, buf: &mut [u8]) -> Result<usize, QuicError>;
async fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), QuicError>;
fn id(&self) -> StreamId;
fn stats(&self) -> StreamStats;
}
```
### 3. QuicServer Trait
Server-side abstraction for accepting connections.
```rust
/// A QUIC server that accepts incoming connections
#[async_trait]
pub trait QuicServer: Send + Sync {
/// Accept an incoming connection
async fn accept(&self) -> Result<Box<dyn QuicConnection>, QuicError>;
/// Get server statistics
fn stats(&self) -> ServerStats;
/// Get listening address
fn local_address(&self) -> Result<SocketAddr, QuicError>;
/// Shutdown the server
async fn shutdown(&self) -> Result<(), QuicError>;
}
/// Builder for creating a QuicServer
pub struct QuicServerBuilder {
config: ServerConfig,
}
impl QuicServerBuilder {
pub fn new() -> Self;
pub fn bind<A: ToSocketAddrs>(self, addr: A) -> Self;
pub fn with_tls_config(self, config: TlsConfig) -> Self;
pub fn with_max_connections(self, max: usize) -> Self;
pub fn with_max_streams_per_connection(self, max: u64) -> Self;
pub fn with_max_idle_timeout(self, timeout: Duration) -> Self;
pub fn build(self) -> Result<Box<dyn QuicServer>, QuicError>;
}
```
### 4. QuicClient Trait
Client-side abstraction for creating connections.
```rust
/// A QUIC client that can create connections
#[async_trait]
pub trait QuicClient: Send + Sync {
/// Connect to a remote server
async fn connect(&self, addr: &str) -> Result<Box<dyn QuicConnection>, QuicError>;
/// Connect with custom configuration
async fn connect_with_config(
&self,
addr: &str,
config: ClientConnectionConfig,
) -> Result<Box<dyn QuicConnection>, QuicError>;
/// Get client statistics
fn stats(&self) -> ClientStats;
}
/// Builder for creating a QuicClient
pub struct QuicClientBuilder {
config: ClientConfig,
}
impl QuicClientBuilder {
pub fn new() -> Self;
pub fn with_tls_config(self, config: TlsConfig) -> Self;
pub fn with_max_streams(self, max: u64) -> Self;
pub fn with_keep_alive(self, interval: Duration) -> Self;
pub fn with_0rtt(self, enabled: bool) -> Self;
pub fn build(self) -> Result<Box<dyn QuicClient>, QuicError>;
}
```
### 5. Supporting Types
```rust
/// Stream priority (0-255, higher is more important)
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
pub struct StreamPriority(u8);
impl StreamPriority {
pub const CRITICAL: Self = Self(255);
pub const HIGH: Self = Self(192);
pub const NORMAL: Self = Self(128);
pub const LOW: Self = Self(64);
pub const BACKGROUND: Self = Self(0);
pub fn new(value: u8) -> Self {
Self(value)
}
}
/// Unique connection identifier
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct ConnectionId([u8; 16]);
/// Unique stream identifier
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct StreamId(u64);
/// Connection statistics
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ConnectionStats {
pub bytes_sent: u64,
pub bytes_received: u64,
pub packets_sent: u64,
pub packets_received: u64,
pub rtt: Duration,
pub cwnd: u64,
pub streams_open: u64,
pub streams_closed: u64,
pub datagrams_sent: u64,
pub datagrams_received: u64,
}
/// Stream statistics
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct StreamStats {
pub bytes_sent: u64,
pub bytes_received: u64,
pub write_buffer_size: usize,
pub read_buffer_size: usize,
}
/// Server statistics
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ServerStats {
pub connections_accepted: u64,
pub connections_active: u64,
pub connections_rejected: u64,
pub total_bytes_sent: u64,
pub total_bytes_received: u64,
}
/// Client statistics
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ClientStats {
pub connections_attempted: u64,
pub connections_successful: u64,
pub connections_failed: u64,
pub total_bytes_sent: u64,
pub total_bytes_received: u64,
}
```
---
## Platform-Specific Implementations
### Native Implementation (quinn)
The native implementation uses the production-ready `quinn` QUIC library.
#### Key Components
**1. NativeQuicConnection** (`native/connection.rs`)
```rust
pub struct NativeQuicConnection {
inner: Arc<quinn::Connection>,
metrics: Arc<RwLock<ConnectionMetrics>>,
stream_priority_manager: Arc<PriorityManager>,
}
impl NativeQuicConnection {
pub fn new(connection: quinn::Connection) -> Self {
Self {
inner: Arc::new(connection),
metrics: Arc::new(RwLock::new(ConnectionMetrics::default())),
stream_priority_manager: Arc::new(PriorityManager::new()),
}
}
}
#[async_trait]
impl QuicConnection for NativeQuicConnection {
async fn open_bi_stream(&self) -> Result<Box<dyn QuicBiStream>, QuicError> {
let (send, recv) = self.inner
.open_bi()
.await
.map_err(QuicError::from)?;
Ok(Box::new(NativeQuicBiStream::new(send, recv, self.metrics.clone())))
}
// ... other trait implementations
}
```
**2. NativeQuicBiStream** (`native/stream.rs`)
```rust
pub struct NativeQuicBiStream {
send: quinn::SendStream,
recv: quinn::RecvStream,
metrics: Arc<RwLock<StreamMetrics>>,
id: StreamId,
}
#[async_trait]
impl QuicBiStream for NativeQuicBiStream {
async fn write(&mut self, data: &[u8]) -> Result<usize, QuicError> {
let written = self.send
.write(data)
.await
.map_err(QuicError::from)?;
self.metrics.write().unwrap().bytes_sent += written as u64;
Ok(written)
}
async fn read(&mut self, buf: &mut [u8]) -> Result<usize, QuicError> {
let read = self.recv
.read(buf)
.await
.map_err(QuicError::from)?
.unwrap_or(0);
self.metrics.write().unwrap().bytes_received += read as u64;
Ok(read)
}
// ... other implementations
}
```
**3. NativeQuicServer** (`native/server.rs`)
```rust
pub struct NativeQuicServer {
endpoint: Arc<quinn::Endpoint>,
config: ServerConfig,
stats: Arc<RwLock<ServerStats>>,
}
impl NativeQuicServer {
pub async fn bind(config: ServerConfig) -> Result<Self, QuicError> {
let server_config = build_quinn_server_config(&config)?;
let endpoint = quinn::Endpoint::server(
server_config,
config.bind_address,
)?;
Ok(Self {
endpoint: Arc::new(endpoint),
config,
stats: Arc::new(RwLock::new(ServerStats::default())),
})
}
}
#[async_trait]
impl QuicServer for NativeQuicServer {
async fn accept(&self) -> Result<Box<dyn QuicConnection>, QuicError> {
let connecting = self.endpoint
.accept()
.await
.ok_or(QuicError::ServerClosed)?;
let connection = connecting
.await
.map_err(QuicError::from)?;
self.stats.write().unwrap().connections_accepted += 1;
Ok(Box::new(NativeQuicConnection::new(connection)))
}
}
```
**4. TLS Configuration** (`native/tls.rs`)
```rust
pub fn build_server_tls_config(config: &TlsConfig) -> Result<rustls::ServerConfig, QuicError> {
let mut server_config = rustls::ServerConfig::builder()
.with_safe_default_cipher_suites()
.with_safe_default_kx_groups()
.with_protocol_versions(&[&rustls::version::TLS13])
.map_err(|e| QuicError::TlsError(e.to_string()))?
.with_no_client_auth();
match config {
TlsConfig::SelfSigned => {
// Generate self-signed certificate using rcgen
let cert = rcgen::generate_simple_self_signed(vec!["localhost".into()])
.map_err(|e| QuicError::TlsError(e.to_string()))?;
let cert_der = cert.serialize_der()
.map_err(|e| QuicError::TlsError(e.to_string()))?;
let key_der = cert.serialize_private_key_der();
server_config.cert_resolver = Arc::new(/* ... */);
}
TlsConfig::Certificate { cert_path, key_path } => {
// Load certificate from files
let certs = load_certs(cert_path)?;
let key = load_private_key(key_path)?;
server_config.cert_resolver = Arc::new(/* ... */);
}
}
Ok(server_config)
}
```
### WASM Implementation (WebTransport)
The WASM implementation uses browser WebTransport API via `web-sys`.
#### Key Components
**1. WasmQuicConnection** (`wasm/connection.rs`)
```rust
use wasm_bindgen::prelude::*;
use wasm_bindgen_futures::JsFuture;
use web_sys::{WebTransport, WebTransportBidirectionalStream, WebTransportDatagramDuplexStream};
pub struct WasmQuicConnection {
transport: WebTransport,
metrics: Arc<RwLock<ConnectionMetrics>>,
stream_counter: Arc<AtomicU64>,
}
impl WasmQuicConnection {
pub async fn connect(url: &str) -> Result<Self, QuicError> {
let transport = WebTransport::new(url)
.map_err(|e| QuicError::ConnectionFailed(format!("{:?}", e)))?;
// Wait for connection to be ready
let ready_promise = transport.ready();
JsFuture::from(ready_promise)
.await
.map_err(|e| QuicError::ConnectionFailed(format!("{:?}", e)))?;
Ok(Self {
transport,
metrics: Arc::new(RwLock::new(ConnectionMetrics::default())),
stream_counter: Arc::new(AtomicU64::new(0)),
})
}
}
#[async_trait(?Send)] // WASM is single-threaded
impl QuicConnection for WasmQuicConnection {
async fn open_bi_stream(&self) -> Result<Box<dyn QuicBiStream>, QuicError> {
let stream_promise = self.transport.create_bidirectional_stream();
let stream = JsFuture::from(stream_promise)
.await
.map_err(|e| QuicError::StreamOpenFailed(format!("{:?}", e)))?;
let bi_stream: WebTransportBidirectionalStream = stream
.dyn_into()
.map_err(|_| QuicError::InvalidStream)?;
let id = StreamId(self.stream_counter.fetch_add(1, Ordering::SeqCst));
Ok(Box::new(WasmQuicBiStream::new(bi_stream, id, self.metrics.clone())))
}
// ... other implementations
}
```
**2. WasmQuicBiStream** (`wasm/stream.rs`)
```rust
pub struct WasmQuicBiStream {
stream: WebTransportBidirectionalStream,
reader: web_sys::ReadableStreamDefaultReader,
writer: web_sys::WritableStreamDefaultWriter,
id: StreamId,
metrics: Arc<RwLock<StreamMetrics>>,
}
impl WasmQuicBiStream {
pub fn new(
stream: WebTransportBidirectionalStream,
id: StreamId,
metrics: Arc<RwLock<ConnectionMetrics>>,
) -> Self {
let reader = stream
.readable()
.get_reader()
.dyn_into()
.expect("Failed to get reader");
let writer = stream
.writable()
.get_writer()
.dyn_into()
.expect("Failed to get writer");
Self {
stream,
reader,
writer,
id,
metrics: Arc::new(RwLock::new(StreamMetrics::default())),
}
}
}
#[async_trait(?Send)]
impl QuicBiStream for WasmQuicBiStream {
async fn write(&mut self, data: &[u8]) -> Result<usize, QuicError> {
let array = js_sys::Uint8Array::from(data);
let promise = self.writer.write_with_chunk(&array);
JsFuture::from(promise)
.await
.map_err(|e| QuicError::WriteError(format!("{:?}", e)))?;
self.metrics.write().unwrap().bytes_sent += data.len() as u64;
Ok(data.len())
}
async fn read(&mut self, buf: &mut [u8]) -> Result<usize, QuicError> {
let read_promise = self.reader.read();
let result = JsFuture::from(read_promise)
.await
.map_err(|e| QuicError::ReadError(format!("{:?}", e)))?;
let result_obj = js_sys::Object::from(result);
let done = js_sys::Reflect::get(&result_obj, &JsValue::from_str("done"))
.unwrap()
.as_bool()
.unwrap_or(false);
if done {
return Ok(0); // Stream closed
}
let value = js_sys::Reflect::get(&result_obj, &JsValue::from_str("value"))
.unwrap();
let array = js_sys::Uint8Array::from(value);
let length = array.length() as usize;
let copy_len = length.min(buf.len());
array.copy_to(&mut buf[..copy_len]);
self.metrics.write().unwrap().bytes_received += copy_len as u64;
Ok(copy_len)
}
// ... other implementations
}
```
**3. JavaScript Bindings** (`wasm/bindings.rs`)
```rust
#[wasm_bindgen]
pub struct WasmQuicClient {
inner: WasmQuicConnection,
}
#[wasm_bindgen]
impl WasmQuicClient {
#[wasm_bindgen(constructor)]
pub async fn connect(url: String) -> Result<WasmQuicClient, JsValue> {
let connection = WasmQuicConnection::connect(&url)
.await
.map_err(|e| JsValue::from_str(&e.to_string()))?;
Ok(WasmQuicClient { inner: connection })
}
#[wasm_bindgen]
pub async fn open_stream(&mut self) -> Result<JsValue, JsValue> {
let stream = self.inner
.open_bi_stream()
.await
.map_err(|e| JsValue::from_str(&e.to_string()))?;
// Wrap stream for JavaScript access
Ok(JsValue::from(/* stream wrapper */))
}
#[wasm_bindgen]
pub fn get_stats(&self) -> JsValue {
let stats = self.inner.stats();
serde_wasm_bindgen::to_value(&stats).unwrap()
}
}
```
---
## Integration Points
### 1. Lean Agentic Learning System Integration
**File**: `src/lean_agentic/quic_transport.rs` (new)
```rust
use quic_multistream::{QuicClient, QuicConnection, StreamPriority};
use crate::lean_agentic::{AgentMessage, AgentId};
/// QUIC-based transport for agent communication
pub struct QuicAgentTransport {
client: Box<dyn QuicClient>,
connections: DashMap<AgentId, Box<dyn QuicConnection>>,
}
impl QuicAgentTransport {
pub async fn new(config: QuicClientConfig) -> Result<Self, Error> {
let client = QuicClientBuilder::new()
.with_0rtt(true)
.with_max_streams(1000)
.build()?;
Ok(Self {
client,
connections: DashMap::new(),
})
}
/// Send high-priority message to agent
pub async fn send_critical(&self, agent_id: AgentId, message: AgentMessage) -> Result<(), Error> {
let connection = self.get_or_create_connection(agent_id).await?;
let mut stream = connection
.open_bi_stream_with_priority(StreamPriority::CRITICAL)
.await?;
let data = bincode::serialize(&message)?;
stream.write_all(&data).await?;
stream.finish().await?;
Ok(())
}
/// Receive messages from all agents
pub async fn receive_stream(&self, agent_id: AgentId) -> impl Stream<Item = AgentMessage> {
let connection = self.connections.get(&agent_id).unwrap();
async_stream::stream! {
loop {
let mut stream = connection.accept_bi_stream().await?;
let mut buffer = Vec::new();
loop {
let mut chunk = vec![0u8; 4096];
let n = stream.read(&mut chunk).await?;
if n == 0 { break; }
buffer.extend_from_slice(&chunk[..n]);
}
let message: AgentMessage = bincode::deserialize(&buffer)?;
yield message;
}
}
}
}
```
### 2. Temporal-Compare Integration
**Enhancement**: Add QUIC streaming support for temporal sequences.
```rust
// In temporal-compare crate
use quic_multistream::{QuicStream, QuicConnection};
impl<T> TemporalComparator<T> {
/// Stream temporal sequences over QUIC for comparison
pub async fn compare_over_quic(
&self,
connection: &dyn QuicConnection,
seq1: &Sequence<T>,
seq2: &Sequence<T>,
algorithm: ComparisonAlgorithm,
) -> Result<ComparisonResult, TemporalError> {
// Open dedicated stream for comparison
let mut stream = connection.open_bi_stream().await?;
// Send sequences
let data = bincode::serialize(&(seq1, seq2, algorithm))?;
stream.write_all(&data).await?;
// Receive result
let mut result_buf = Vec::new();
stream.read_to_end(&mut result_buf).await?;
let result = bincode::deserialize(&result_buf)?;
Ok(result)
}
}
```
### 3. Dashboard Integration
**Enhancement**: Real-time QUIC metrics in dashboard.
```typescript
// In npm/src/dashboard.ts
import { QuicConnectionStats, QuicStreamStats } from 'quic-multistream-wasm';
interface QuicMetrics {
connections: Map<string, QuicConnectionStats>;
streams: Map<string, QuicStreamStats>;
totalThroughput: number;
averageRtt: number;
}
class MidStreamDashboard {
private quicMetrics: QuicMetrics;
updateQuicMetrics(connectionId: string, stats: QuicConnectionStats) {
this.quicMetrics.connections.set(connectionId, stats);
this.renderQuicSection();
}
private renderQuicSection() {
// Display QUIC connection stats, RTT graphs, stream counts, etc.
}
}
```
### 4. WASM Bindings Integration
**File**: `wasm-bindings/src/quic.rs` (new)
```rust
use wasm_bindgen::prelude::*;
use quic_multistream::wasm::{WasmQuicClient, WasmQuicConnection};
#[wasm_bindgen]
pub struct QuicClientHandle {
client: WasmQuicClient,
}
#[wasm_bindgen]
impl QuicClientHandle {
#[wasm_bindgen(constructor)]
pub async fn new() -> Result<QuicClientHandle, JsValue> {
let client = WasmQuicClient::new().await?;
Ok(QuicClientHandle { client })
}
#[wasm_bindgen]
pub async fn connect(&self, url: String) -> Result<ConnectionHandle, JsValue> {
let connection = self.client.connect(&url).await?;
Ok(ConnectionHandle { connection })
}
}
#[wasm_bindgen]
pub struct ConnectionHandle {
connection: WasmQuicConnection,
}
#[wasm_bindgen]
impl ConnectionHandle {
#[wasm_bindgen]
pub async fn open_stream(&self, priority: u8) -> Result<StreamHandle, JsValue> {
let stream = self.connection
.open_bi_stream_with_priority(StreamPriority::new(priority))
.await?;
Ok(StreamHandle { stream })
}
#[wasm_bindgen]
pub fn stats(&self) -> JsValue {
let stats = self.connection.stats();
serde_wasm_bindgen::to_value(&stats).unwrap()
}
}
```
---
## Dependencies
### Native Dependencies
**Cargo.toml**:
```toml
[package]
name = "quic-multistream"
version = "0.1.0"
edition = "2021"
description = "Cross-platform QUIC multiplexed streaming (native & WASM)"
license = "MIT"
[dependencies]
# Core async runtime
tokio = { version = "1.42", features = ["full"], optional = true }
async-trait = "0.1"
futures = "0.3"
# Error handling
thiserror = "2.0"
anyhow = "1.0"
# Serialization
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"
bincode = "1.3"
# Bytes and buffers
bytes = "1.5"
parking_lot = "0.12"
# Metrics and tracing
tracing = "0.1"
tracing-subscriber = { version = "0.3", optional = true }
# Concurrency
dashmap = "6.1"
# Native QUIC dependencies (feature-gated)
[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
quinn = { version = "0.11", optional = true }
rustls = { version = "0.23", optional = true }
rcgen = { version = "0.13", optional = true }
ring = "0.17"
# WASM dependencies (feature-gated)
[target.'cfg(target_arch = "wasm32")'.dependencies]
wasm-bindgen = { version = "0.2", optional = true }
wasm-bindgen-futures = { version = "0.4", optional = true }
js-sys = { version = "0.3", optional = true }
web-sys = { version = "0.3", features = [
"WebTransport",
"WebTransportBidirectionalStream",
"WebTransportDatagramDuplexStream",
"WebTransportSendStream",
"WebTransportReceiveStream",
"ReadableStream",
"ReadableStreamDefaultReader",
"WritableStream",
"WritableStreamDefaultWriter",
], optional = true }
serde-wasm-bindgen = { version = "0.6", optional = true }
[dev-dependencies]
tokio-test = "0.4"
criterion = { version = "0.5", features = ["html_reports", "async_tokio"] }
tempfile = "3.8"
[features]
default = ["native"]
native = ["quinn", "rustls", "rcgen", "tokio", "tracing-subscriber"]
wasm = ["wasm-bindgen", "wasm-bindgen-futures", "js-sys", "web-sys", "serde-wasm-bindgen"]
full = ["native", "wasm"]
[[bench]]
name = "throughput"
harness = false
[[bench]]
name = "latency"
harness = false
[[bench]]
name = "concurrent_streams"
harness = false
```
### Version Requirements Rationale
| `quinn` | 0.11 | Latest stable, HTTP/3 support, excellent performance |
| `rustls` | 0.23 | TLS 1.3, no OpenSSL dependency, WASM-compatible |
| `tokio` | 1.42 | Latest stable async runtime |
| `web-sys` | 0.3 | WebTransport API bindings |
| `wasm-bindgen` | 0.2 | Stable WASM interop |
| `bytes` | 1.5 | Zero-copy buffer management |
| `dashmap` | 6.1 | Lock-free concurrent hash map |
| `serde` | 1.0 | De facto serialization standard |
---
## API Design
### High-Level Usage Examples
#### 1. Simple Echo Server (Native)
```rust
use quic_multistream::{QuicServerBuilder, QuicServer};
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
let server = QuicServerBuilder::new()
.bind("0.0.0.0:4433")?
.with_max_connections(1000)
.with_max_streams_per_connection(100)
.build()?;
println!("QUIC server listening on 0.0.0.0:4433");
loop {
let connection = server.accept().await?;
tokio::spawn(async move {
while let Ok(mut stream) = connection.accept_bi_stream().await {
tokio::spawn(async move {
let mut buffer = vec![0u8; 4096];
while let Ok(n) = stream.read(&mut buffer).await {
if n == 0 { break; }
stream.write_all(&buffer[..n]).await.unwrap();
}
stream.finish().await.unwrap();
});
}
});
}
}
```
#### 2. Client with Prioritized Streams (Native)
```rust
use quic_multistream::{QuicClientBuilder, StreamPriority};
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
let client = QuicClientBuilder::new()
.with_0rtt(true)
.build()?;
let connection = client.connect("localhost:4433").await?;
// High-priority control stream
let mut control_stream = connection
.open_bi_stream_with_priority(StreamPriority::CRITICAL)
.await?;
control_stream.write_all(b"CONTROL MESSAGE").await?;
// Normal priority data stream
let mut data_stream = connection
.open_bi_stream_with_priority(StreamPriority::NORMAL)
.await?;
data_stream.write_all(b"DATA PAYLOAD").await?;
// Low priority logs stream
let mut log_stream = connection
.open_bi_stream_with_priority(StreamPriority::LOW)
.await?;
log_stream.write_all(b"LOG: operation completed").await?;
// Read responses
let mut response = vec![0u8; 1024];
let n = control_stream.read(&mut response).await?;
println!("Control response: {}", String::from_utf8_lossy(&response[..n]));
Ok(())
}
```
#### 3. WASM Client (Browser)
```rust
use wasm_bindgen::prelude::*;
use quic_multistream::wasm::WasmQuicClient;
#[wasm_bindgen]
pub async fn connect_and_send() -> Result<(), JsValue> {
let client = WasmQuicClient::new().await?;
let connection = client.connect("https://example.com:4433").await?;
let mut stream = connection.open_bi_stream().await?;
stream.write_all(b"Hello from WASM!").await?;
let mut response = vec![0u8; 1024];
let n = stream.read(&mut response).await?;
web_sys::console::log_1(&format!("Received: {}", String::from_utf8_lossy(&response[..n])).into());
Ok(())
}
```
#### 4. Multi-Agent Coordination
```rust
use quic_multistream::{QuicClientBuilder, StreamPriority};
use tokio::sync::mpsc;
async fn coordinate_agents(agent_urls: Vec<String>) -> Result<(), Box<dyn std::error::Error>> {
let client = QuicClientBuilder::new().build()?;
let (tx, mut rx) = mpsc::channel(100);
// Connect to all agents
for url in agent_urls {
let client = client.clone();
let tx = tx.clone();
tokio::spawn(async move {
let connection = client.connect(&url).await.unwrap();
// Open coordination stream
let mut stream = connection
.open_bi_stream_with_priority(StreamPriority::HIGH)
.await
.unwrap();
// Send coordination message
stream.write_all(b"COORDINATE").await.unwrap();
// Receive agent response
let mut response = vec![0u8; 1024];
let n = stream.read(&mut response).await.unwrap();
tx.send(response[..n].to_vec()).await.unwrap();
});
}
// Collect responses from all agents
drop(tx);
while let Some(response) = rx.recv().await {
println!("Agent response: {:?}", response);
}
Ok(())
}
```
---
## Performance Targets
### Latency Targets
| 0-RTT Connection | < 1ms | Time from `connect()` to first stream open |
| Stream Open | < 100μs | Time to open new stream on existing connection |
| First Byte Latency | < 5ms | Time to send and receive first byte |
| Round-Trip Time (RTT) | < 10ms (LAN)<br>< 50ms (WAN) | Measured via connection stats |
### Throughput Targets
| Single Stream | > 100 MB/s | Sequential write benchmark |
| Aggregate (100 streams) | > 1 GB/s | Parallel writes across streams |
| Small Messages | > 50,000 msg/s | 1KB message throughput |
| Large Messages | > 10,000 msg/s | 64KB message throughput |
### Resource Targets
| Memory per Connection | < 256 KB | RSS measurement |
| Memory per Stream | < 16 KB | Heap profiling |
| CPU per Connection | < 1% (idle)<br>< 10% (active) | CPU profiling |
| Max Concurrent Streams | > 1,000 | Stress testing |
| Max Concurrent Connections | > 10,000 | Server stress testing |
### Benchmarking Infrastructure
**Criterion Benchmark Suite**:
```rust
// benches/throughput.rs
use criterion::{criterion_group, criterion_main, Criterion, BenchmarkId, Throughput};
use quic_multistream::{QuicClientBuilder, QuicServerBuilder};
async fn setup_connection() -> (QuicServer, QuicConnection) {
let server = QuicServerBuilder::new()
.bind("127.0.0.1:0")
.unwrap()
.build()
.unwrap();
let addr = server.local_address().unwrap();
let client = QuicClientBuilder::new().build().unwrap();
let connection = client.connect(&addr.to_string()).await.unwrap();
(server, connection)
}
fn throughput_benchmark(c: &mut Criterion) {
let rt = tokio::runtime::Runtime::new().unwrap();
let mut group = c.benchmark_group("throughput");
for size in [1024, 4096, 16384, 65536].iter() {
group.throughput(Throughput::Bytes(*size as u64));
group.bench_with_input(BenchmarkId::from_parameter(size), size, |b, &size| {
b.to_async(&rt).iter(|| async {
let (_, connection) = setup_connection().await;
let mut stream = connection.open_bi_stream().await.unwrap();
let data = vec![0u8; size];
stream.write_all(&data).await.unwrap();
stream.finish().await.unwrap();
});
});
}
group.finish();
}
criterion_group!(benches, throughput_benchmark);
criterion_main!(benches);
```
---
## Testing Strategy
### Test Pyramid
```
┌─────────────┐
│ E2E Tests │ (10%)
│ Cross-plat │
└──────┬──────┘
┌─────────┴─────────┐
│ Integration Tests │ (30%)
│ Native + WASM │
└─────────┬─────────┘
┌──────────────┴──────────────┐
│ Unit Tests │ (60%)
│ Per-module, Per-function │
└──────────────────────────────┘
```
### Unit Tests (60% of tests)
**Coverage**: Each module and function
```rust
// tests in src/connection.rs
#[cfg(test)]
mod tests {
use super::*;
#[tokio::test]
async fn test_connection_open_bi_stream() {
let connection = setup_test_connection().await;
let stream = connection.open_bi_stream().await;
assert!(stream.is_ok());
}
#[tokio::test]
async fn test_connection_stats() {
let connection = setup_test_connection().await;
let stats = connection.stats();
assert_eq!(stats.streams_open, 0);
}
#[tokio::test]
async fn test_stream_write_read() {
let mut stream = setup_test_stream().await;
let data = b"test data";
stream.write_all(data).await.unwrap();
stream.finish().await.unwrap();
let mut buf = vec![0u8; 1024];
let n = stream.read(&mut buf).await.unwrap();
assert_eq!(&buf[..n], data);
}
#[tokio::test]
async fn test_stream_priority() {
let mut stream = setup_test_stream().await;
stream.set_priority(StreamPriority::HIGH);
// Verify priority is set correctly
}
}
```
### Integration Tests (30% of tests)
**Coverage**: Cross-module interactions, end-to-end flows
```rust
// tests/integration_tests.rs
#[tokio::test]
async fn test_server_client_communication() {
let server = QuicServerBuilder::new()
.bind("127.0.0.1:0")
.unwrap()
.build()
.unwrap();
let addr = server.local_address().unwrap();
// Spawn server task
tokio::spawn(async move {
let connection = server.accept().await.unwrap();
let mut stream = connection.accept_bi_stream().await.unwrap();
let mut buf = vec![0u8; 1024];
let n = stream.read(&mut buf).await.unwrap();
stream.write_all(&buf[..n]).await.unwrap();
stream.finish().await.unwrap();
});
// Client connects and sends data
let client = QuicClientBuilder::new().build().unwrap();
let connection = client.connect(&addr.to_string()).await.unwrap();
let mut stream = connection.open_bi_stream().await.unwrap();
let message = b"Hello, QUIC!";
stream.write_all(message).await.unwrap();
stream.finish().await.unwrap();
let mut response = vec![0u8; 1024];
let n = stream.read(&mut response).await.unwrap();
assert_eq!(&response[..n], message);
}
#[tokio::test]
async fn test_multiple_concurrent_streams() {
let (server, connection) = setup_connection().await;
let mut streams = vec![];
for i in 0..100 {
let stream = connection.open_bi_stream().await.unwrap();
streams.push(stream);
}
assert_eq!(streams.len(), 100);
assert_eq!(connection.stats().streams_open, 100);
}
#[tokio::test]
async fn test_stream_prioritization() {
let connection = setup_connection().await;
let mut critical = connection
.open_bi_stream_with_priority(StreamPriority::CRITICAL)
.await
.unwrap();
let mut low = connection
.open_bi_stream_with_priority(StreamPriority::LOW)
.await
.unwrap();
// Verify critical stream gets bandwidth preference
// (requires custom test infrastructure)
}
```
### WASM-Specific Tests
```rust
// tests/wasm_tests.rs
#![cfg(target_arch = "wasm32")]
use wasm_bindgen_test::*;
use quic_multistream::wasm::WasmQuicClient;
wasm_bindgen_test_configure!(run_in_browser);
#[wasm_bindgen_test]
async fn test_wasm_connection() {
let client = WasmQuicClient::new().await.unwrap();
let connection = client
.connect("https://localhost:4433")
.await
.unwrap();
assert!(!connection.is_closed());
}
#[wasm_bindgen_test]
async fn test_wasm_stream_write() {
let client = WasmQuicClient::new().await.unwrap();
let connection = client.connect("https://localhost:4433").await.unwrap();
let mut stream = connection.open_bi_stream().await.unwrap();
let data = b"test from wasm";
let written = stream.write(data).await.unwrap();
assert_eq!(written, data.len());
}
```
### End-to-End Tests (10% of tests)
**Coverage**: Real-world scenarios, cross-platform
```rust
// tests/e2e_tests.rs
#[tokio::test]
async fn test_native_server_wasm_client() {
// Start native server
let server = start_native_server().await;
// Connect with WASM client (via headless browser)
let wasm_client = spawn_wasm_client().await;
// Send data from WASM to native
wasm_client.send(b"Hello from WASM").await;
// Verify server receives data
let received = server.receive().await;
assert_eq!(received, b"Hello from WASM");
}
#[tokio::test]
async fn test_multi_agent_coordination() {
// Spawn 10 agents
let agents = spawn_agents(10).await;
// Each agent opens 10 streams
for agent in &agents {
for _ in 0..10 {
agent.open_stream().await.unwrap();
}
}
// Verify all connections stable
for agent in &agents {
assert!(agent.is_connected());
assert_eq!(agent.stream_count(), 10);
}
}
```
### Test Coverage Goals
| Core traits | 100% |
| Native implementation | 95% |
| WASM implementation | 90% |
| Error handling | 100% |
| Configuration | 90% |
| Overall | 95% |
---
## Security Considerations
### TLS Configuration
**Default Security Posture**:
```rust
pub fn default_tls_config() -> TlsConfig {
TlsConfig {
// TLS 1.3 only
min_version: TlsVersion::TLS13,
max_version: TlsVersion::TLS13,
// Strong cipher suites only
cipher_suites: vec![
CipherSuite::TLS13_AES_256_GCM_SHA384,
CipherSuite::TLS13_CHACHA20_POLY1305_SHA256,
],
// Require certificate verification
verify_certificates: true,
// No session resumption by default (can enable for 0-RTT)
enable_session_resumption: false,
// Certificate pinning for production
certificate_pins: None,
}
}
```
### Authentication
```rust
pub trait QuicAuthenticator: Send + Sync {
/// Authenticate incoming connection
async fn authenticate_connection(
&self,
peer_cert: &Certificate,
remote_addr: SocketAddr,
) -> Result<AuthResult, AuthError>;
/// Authenticate stream within connection
async fn authenticate_stream(
&self,
connection_id: ConnectionId,
stream_id: StreamId,
first_bytes: &[u8],
) -> Result<StreamAuthResult, AuthError>;
}
pub struct TokenAuthenticator {
valid_tokens: DashMap<String, TokenInfo>,
}
impl QuicAuthenticator for TokenAuthenticator {
async fn authenticate_stream(
&self,
_connection_id: ConnectionId,
_stream_id: StreamId,
first_bytes: &[u8],
) -> Result<StreamAuthResult, AuthError> {
// Parse token from first bytes
let token = parse_token(first_bytes)?;
// Validate token
if let Some(info) = self.valid_tokens.get(&token) {
if info.is_expired() {
return Err(AuthError::TokenExpired);
}
Ok(StreamAuthResult::Authenticated(info.user_id))
} else {
Err(AuthError::InvalidToken)
}
}
}
```
### Rate Limiting
```rust
pub struct RateLimiter {
connections_per_ip: DashMap<IpAddr, RateLimitState>,
global_connection_limit: AtomicU64,
max_connections_per_ip: u64,
max_global_connections: u64,
}
impl RateLimiter {
pub fn check_connection(&self, remote_addr: SocketAddr) -> Result<(), RateLimitError> {
// Check global limit
let global = self.global_connection_limit.load(Ordering::Relaxed);
if global >= self.max_global_connections {
return Err(RateLimitError::GlobalLimitExceeded);
}
// Check per-IP limit
let ip = remote_addr.ip();
let mut state = self.connections_per_ip
.entry(ip)
.or_insert_with(RateLimitState::new);
if state.connection_count >= self.max_connections_per_ip {
return Err(RateLimitError::IpLimitExceeded(ip));
}
state.connection_count += 1;
self.global_connection_limit.fetch_add(1, Ordering::Relaxed);
Ok(())
}
}
```
### Input Validation
```rust
pub struct StreamValidator;
impl StreamValidator {
/// Validate stream data before processing
pub fn validate_data(data: &[u8], max_size: usize) -> Result<(), ValidationError> {
// Check size limits
if data.len() > max_size {
return Err(ValidationError::DataTooLarge {
size: data.len(),
max: max_size,
});
}
// Check for null bytes in text data
if data.contains(&0) {
return Err(ValidationError::InvalidData("null bytes detected"));
}
Ok(())
}
/// Validate stream metadata
pub fn validate_stream_id(id: StreamId, max_streams: u64) -> Result<(), ValidationError> {
if id.0 > max_streams {
return Err(ValidationError::InvalidStreamId(id));
}
Ok(())
}
}
```
### Security Checklist
- [x] TLS 1.3 enforcement
- [x] Certificate verification
- [x] Rate limiting (per-IP and global)
- [x] Input validation
- [x] Authentication framework
- [x] No hardcoded secrets
- [x] Secure random number generation
- [x] Memory-safe (Rust guarantees)
- [x] DoS protection (connection limits)
- [x] Logging (no sensitive data)
---
## Implementation Roadmap
### Phase 1: Core Infrastructure (Week 1)
**Goals**: Establish foundation and build system
- [x] Create crate structure
- [ ] Define core traits (`QuicConnection`, `QuicStream`, etc.)
- [ ] Implement error types
- [ ] Set up configuration types
- [ ] Add metrics infrastructure
- [ ] Configure build system with feature flags
- [ ] Set up CI/CD pipeline
**Deliverables**:
- Compilable crate skeleton
- Core trait definitions
- Build infrastructure
- Basic tests (unit tests for types)
### Phase 2: Native Implementation (Week 2)
**Goals**: Complete quinn-based native implementation
- [ ] Implement `NativeQuicConnection`
- [ ] Implement `NativeQuicBiStream`, `NativeQuicSendStream`, `NativeQuicRecvStream`
- [ ] Implement `NativeQuicServer`
- [ ] Implement `NativeQuicClient`
- [ ] Add TLS configuration
- [ ] Add transport configuration
- [ ] Write unit tests (60% coverage)
- [ ] Write integration tests
**Deliverables**:
- Fully functional native QUIC implementation
- Echo server/client examples
- Test suite with 95% coverage
- Performance benchmarks
### Phase 3: WASM Implementation (Week 3)
**Goals**: Complete WebTransport-based WASM implementation
- [ ] Implement `WasmQuicConnection`
- [ ] Implement `WasmQuicBiStream`
- [ ] Implement `WasmQuicClient`
- [ ] Create JavaScript bindings
- [ ] Add wasm-bindgen exports
- [ ] Write WASM-specific tests
- [ ] Create browser demo
**Deliverables**:
- Fully functional WASM QUIC implementation
- Browser-based examples
- WASM test suite
- Documentation for browser usage
### Phase 4: Advanced Features (Week 4)
**Goals**: Add production-ready features
- [ ] Stream prioritization
- [ ] Datagram support (unreliable messages)
- [ ] Connection migration
- [ ] 0-RTT support
- [ ] Buffer pooling optimization
- [ ] Congestion control tuning
- [ ] Performance benchmarking
- [ ] Cross-platform integration tests
**Deliverables**:
- Advanced feature set
- Optimized performance
- Comprehensive benchmarks
- Cross-platform tests
### Phase 5: Integration & Documentation (Week 5)
**Goals**: Integrate with MidStream ecosystem
- [ ] Integrate with Lean Agentic system
- [ ] Integrate with temporal-compare
- [ ] Integrate with dashboard
- [ ] Create WASM bindings package
- [ ] Write comprehensive documentation
- [ ] Create tutorial and examples
- [ ] Performance tuning
- [ ] Security audit
**Deliverables**:
- Full ecosystem integration
- Complete documentation
- Example applications
- Security audit report
- Production-ready crate
### Phase 6: Production Hardening (Week 6)
**Goals**: Make production-ready
- [ ] Load testing (10,000+ connections)
- [ ] Stress testing (max streams)
- [ ] Failure recovery testing
- [ ] Memory leak testing
- [ ] Performance regression testing
- [ ] Security penetration testing
- [ ] Cross-browser testing (WASM)
- [ ] Final optimizations
**Deliverables**:
- Production-hardened crate
- Performance report
- Security report
- Published to crates.io
- Published npm package (WASM)
---
## Success Metrics
### Performance Metrics
| 0-RTT Connection | 5ms | < 1ms | TBD |
| Stream Open Latency | 500μs | < 100μs | TBD |
| Throughput (single) | 50 MB/s | > 100 MB/s | TBD |
| Throughput (100 streams) | 200 MB/s | > 1 GB/s | TBD |
| Memory per Connection | 512 KB | < 256 KB | TBD |
| Max Concurrent Streams | 100 | > 1,000 | TBD |
### Quality Metrics
| Test Coverage | 95% | TBD |
| Documentation Coverage | 100% (public API) | TBD |
| Security Audit Score | A+ | TBD |
| Cross-platform Tests | Pass 100% | TBD |
| Example Coverage | 5+ examples | TBD |
### Ecosystem Integration
| Lean Agentic System | Planned | Agent communication transport |
| Temporal Compare | Planned | Streaming sequence comparison |
| Dashboard | Planned | Real-time metrics display |
| WASM Bindings | Planned | Browser-based agents |
---
## Appendix A: Example Configurations
### Production Server Configuration
```rust
let server = QuicServerBuilder::new()
.bind("0.0.0.0:443")?
.with_tls_config(TlsConfig::Certificate {
cert_path: "/etc/ssl/certs/server.crt",
key_path: "/etc/ssl/private/server.key",
})
.with_max_connections(10_000)
.with_max_streams_per_connection(1_000)
.with_max_idle_timeout(Duration::from_secs(30))
.with_keep_alive(Duration::from_secs(10))
.with_congestion_control(CongestionControl::Bbr)
.with_rate_limiter(RateLimiter::new(100, 1000))
.with_authenticator(TokenAuthenticator::new())
.build()?;
```
### Development Client Configuration
```rust
let client = QuicClientBuilder::new()
.with_tls_config(TlsConfig::SelfSigned) // Accept self-signed certs
.with_0rtt(true)
.with_max_streams(100)
.with_keep_alive(Duration::from_secs(5))
.build()?;
```
---
## Appendix B: Error Handling
### Error Type Hierarchy
```rust
#[derive(Debug, Error)]
pub enum QuicError {
#[error("Connection failed: {0}")]
ConnectionFailed(String),
#[error("Stream open failed: {0}")]
StreamOpenFailed(String),
#[error("Write error: {0}")]
WriteError(String),
#[error("Read error: {0}")]
ReadError(String),
#[error("TLS error: {0}")]
TlsError(String),
#[error("Invalid configuration: {0}")]
InvalidConfig(String),
#[error("Server closed")]
ServerClosed,
#[error("Connection closed: {0}")]
ConnectionClosed(String),
#[error("Stream reset: {0}")]
StreamReset(u64),
#[error("Rate limit exceeded")]
RateLimitExceeded,
#[error("Authentication failed: {0}")]
AuthenticationFailed(String),
#[error("Invalid stream")]
InvalidStream,
#[error("Timeout after {0:?}")]
Timeout(Duration),
#[error("IO error: {0}")]
Io(#[from] std::io::Error),
#[error("Native error: {0}")]
Native(String),
#[error("WASM error: {0}")]
Wasm(String),
}
```
---
## Appendix C: References
1. **QUIC Specification**: RFC 9000 - QUIC: A UDP-Based Multiplexed and Secure Transport
2. **HTTP/3 Specification**: RFC 9114 - HTTP/3
3. **TLS for QUIC**: RFC 9001 - Using TLS to Secure QUIC
4. **WebTransport**: W3C WebTransport Specification
5. **Quinn Library**: https://github.com/quinn-rs/quinn
6. **Rustls**: https://github.com/rustls/rustls
7. **web-sys WebTransport**: https://rustwasm.github.io/wasm-bindgen/api/web_sys/struct.WebTransport.html
---
## Document History
| 0.1.0 | 2025-10-26 | rUv Team | Initial architecture design |
---
**End of Architecture Document**