use crate::{
types::SecureMessage,
error::Result,
circuit_breaker::{CircuitBreaker, CircuitBreakerConfig, synapse::blockchain::serialization::{DateTimeWrapper, UuidWrapper}},,
};
use super::abstraction::*;
use async_trait::async_trait;
use std::{
time::{Duration, Instant},
sync::{Arc, RwLock},
collections::HashMap,
net::SocketAddr,
};
use tokio::{
sync::Mutex,
time::timeout,
};
use tracing::{info, debug, warn, error};
use serde_json;
pub struct QuicTransportImpl {
local_addr: SocketAddr,
connection_timeout: Duration,
max_concurrent_streams: u32,
connections: Arc<Mutex<HashMap<String, QuicConnection>>>,
received_messages: Arc<Mutex<Vec<IncomingMessage>>>,
status: Arc<RwLock<TransportStatus>>,
metrics: Arc<RwLock<TransportMetrics>>,
circuit_breaker: Arc<CircuitBreaker>,
max_message_size: usize,
}
#[derive(Debug, Clone)]
struct QuicConnection {
id: String,
remote_addr: SocketAddr,
connected_at: Instant,
last_activity: Instant,
streams: u32,
is_server: bool, rtt: Option<Duration>,
}
impl QuicTransportImpl {
pub async fn new(config: &HashMap<String, String>) -> Result<Self> {
let bind_addr = config.get("bind_address")
.and_then(|addr| addr.parse().ok())
.unwrap_or_else(|| "0.0.0.0:0".parse().unwrap());
let connection_timeout = config.get("connection_timeout_ms")
.and_then(|t| t.parse().ok())
.map(Duration::from_millis)
.unwrap_or(Duration::from_secs(10));
let max_concurrent_streams = config.get("max_concurrent_streams")
.and_then(|s| s.parse().ok())
.unwrap_or(1000);
let max_message_size = config.get("max_message_size")
.and_then(|s| s.parse().ok())
.unwrap_or(10 * 1024 * 1024);
let circuit_breaker_config = CircuitBreakerConfig {
failure_threshold: 5,
recovery_timeout: Duration::from_secs(30),
success_threshold: 3,
timeout: Duration::from_secs(15),
max_half_open_requests: 2,
};
let mut metrics = TransportMetrics::default();
metrics.transport_type = TransportType::Quic;
Ok(Self {
local_addr: bind_addr,
connection_timeout,
max_concurrent_streams,
connections: Arc::new(Mutex::new(HashMap::new())),
received_messages: Arc::new(Mutex::new(Vec::new())),
status: Arc::new(RwLock::new(TransportStatus::Stopped)),
metrics: Arc::new(RwLock::new(metrics)),
circuit_breaker: Arc::new(CircuitBreaker::new(circuit_breaker_config)),
max_message_size,
})
}
async fn connect_to_server(&self, target_addr: SocketAddr) -> Result<QuicConnection> {
let start_time = Instant::now();
debug!("Connecting to QUIC server: {}", target_addr);
let connection_id = format!("client_{}", target_addr);
let connection = QuicConnection {
id: connection_id.clone(),
remote_addr: target_addr,
connected_at: start_time,
last_activity: Instant::now(),
streams: 0,
is_server: false,
rtt: Some(Duration::from_millis(20)), };
tokio::time::sleep(Duration::from_millis(50)).await;
{
let mut connections = self.connections.lock().await;
connections.insert(connection_id, connection.clone());
}
debug!("QUIC connection established to {} in {:?}", target_addr, start_time.elapsed());
Ok(connection)
}
async fn send_quic_message(&self, connection_id: &str, message: &SecureMessage) -> Result<Duration> {
let start_time = Instant::now();
let connection = {
let connections = self.connections.lock().await;
connections.get(connection_id).cloned()
};
let mut connection = connection.ok_or_else(|| crate::error::SynapseError::NetworkError("Network error".to_string()))?;
let message_json = serde_json::to_string(message)
.map_err(|e| crate::error::SynapseError::SerializationError("Serialization error".to_string()))?;
if message_json.len() > self.max_message_size {
return Err(crate::error::SynapseError::Generic("Validation error".to_string()) bytes", message_json.len()),
});
}
// In real implementation, this would:
// 1. Open a new QUIC stream or reuse existing one
// 2. Send message over stream with QUIC reliability guarantees
// 3. Handle stream multiplexing and flow control
// 4. Get delivery confirmation from QUIC layer
debug!("Sending QUIC message to connection {}: {} bytes", connection_id, message_json.len());
// Simulate QUIC's efficient sending
tokio::time::sleep(Duration::from_millis(5)).await;
// Update connection activity and stream count
connection.last_activity = Instant::now();
connection.streams += 1;
{
let mut connections = self.connections.lock().await;
connections.insert(connection_id.to_string(), connection);
}
let duration = start_time.elapsed();
debug!("QUIC message sent in {:?}", duration);
Ok(duration)
}
/// Receive messages from QUIC connections
async fn receive_quic_messages(&self) -> Result<Vec<IncomingMessage>> {
// In real implementation, this would:
// 1. Poll all active QUIC connections for incoming streams
// 2. Read data from multiplexed streams
// 3. Deserialize SecureMessage from stream data
// 4. Handle QUIC connection events (new connections, migrations, etc.)
// 5. Return as IncomingMessage instances
// For simulation, return empty list
Ok(Vec::new())
}
/// Start QUIC server
async fn start_server(&self) -> Result<()> {
debug!("Starting QUIC server on {}", self.local_addr);
// In real implementation, this would:
// 1. Configure QUIC server with certificates and crypto
// 2. Bind to local address
// 3. Start accepting incoming QUIC connections
// 4. Handle QUIC-specific features like 0-RTT, connection migration
// For simulation, just log
info!("QUIC server started on {}", self.local_addr);
Ok(())
}
/// Update transport metrics
async fn update_metrics(&self, operation: &str, duration: Duration, success: bool) {
let mut metrics = self.metrics.write().await;
if success {
if operation == "send" {
metrics.messages_sent += 1;
metrics.bytes_sent += 1024; // Estimate
} else if operation == "receive" {
metrics.messages_received += 1;
metrics.bytes_received += 1024; // Estimate
}
// Update average latency
let current_avg = metrics.average_latency_ms;
let new_latency = duration.as_millis() as u64;
metrics.average_latency_ms = if current_avg == 0 {
new_latency
} else {
(current_avg + new_latency) / 2
};
// Update reliability (moving average)
metrics.reliability_score = (metrics.reliability_score * 0.9) + 0.1;
} else {
if operation == "send" {
metrics.send_failures += 1;
} else if operation == "receive" {
metrics.receive_failures += 1;
}
// Decrease reliability
metrics.reliability_score = (metrics.reliability_score * 0.9);
}
// Update active connections count
let connections = self.connections.lock().await;
metrics.active_connections = connections.len() as u32;
// Add QUIC-specific metrics
let total_streams: u32 = connections.values().map(|c| c.streams).sum();
metrics.custom_metrics.insert("total_streams".to_string(), total_streams as f64);
metrics.custom_metrics.insert("max_concurrent_streams".to_string(), self.max_concurrent_streams as f64);
metrics.last_updated_timestamp = std::time::SystemTime::now()
.duration_since(std::time::UNIX_EPOCH)
.unwrap_or_default()
.as_secs();
}
}
#[async_trait]
impl Transport for QuicTransportImpl {
fn transport_type(&self) -> TransportType {
TransportType::Quic
}
fn capabilities(&self) -> TransportCapabilities {
TransportCapabilities {
max_message_size: self.max_message_size,
reliable: true, // QUIC provides reliability
real_time: true, // Excellent for real-time due to low latency
broadcast: false, // QUIC is connection-oriented
bidirectional: true, // Full-duplex communication
encrypted: true, // Built-in encryption (TLS 1.3)
network_spanning: true, // Works across networks/internet
supported_urgencies: vec![
MessageUrgency::Critical,
MessageUrgency::RealTime,
MessageUrgency::Interactive,
MessageUrgency::Background,
],
features: vec![
"multiplexing".to_string(),
"0_rtt".to_string(),
"connection_migration".to_string(),
"built_in_encryption".to_string(),
"head_of_line_blocking_free".to_string(),
"congestion_control".to_string(),
"low_latency".to_string(),
],
}
}
async fn can_reach(&self, target: &TransportTarget) -> bool {
// Check if target has a valid socket address
if let Some(address) = &target.address {
if address.parse::<SocketAddr>().is_ok() {
return true;
}
// Check for QUIC URL schemes (hypothetical)
if address.starts_with("quic: return true;
}
}
let connections = self.connections.lock().await;
connections.contains_key(&target.identifier)
}
async fn estimate_metrics(&self, target: &TransportTarget) -> Result<TransportEstimate> {
let can_reach = self.can_reach(target).await;
if can_reach {
Ok(TransportEstimate {
latency: Duration::from_millis(15), reliability: 0.98, bandwidth: 100 * 1024 * 1024, cost: 3.0, available: true,
confidence: 0.9, })
} else {
Ok(TransportEstimate {
latency: Duration::from_secs(5),
reliability: 0.0,
bandwidth: 0,
cost: 1000.0,
available: false,
confidence: 0.95,
})
}
}
async fn send_message(&self, target: &TransportTarget, message: &SecureMessage) -> Result<DeliveryReceipt> {
let connection_id = {
let connections = self.connections.lock().await;
if connections.contains_key(&target.identifier) {
target.identifier.clone()
} else {
drop(connections);
if let Some(address) = &target.address {
let target_addr = address.parse::<SocketAddr>()
.map_err(|e| crate::error::SynapseError::Generic("Validation error".to_string())", e),
})?;
let connection = self.connect_to_server(target_addr).await?;
connection.id
} else {
return Err(crate::error::SynapseError::Generic("Validation error".to_string()));
}
}
};
// Use circuit breaker to protect against failures
let send_result = self.circuit_breaker.call(async {
timeout(self.connection_timeout, self.send_quic_message(&connection_id, message)).await
.map_err(|_| crate::error::SynapseError::NetworkError("Network error".to_string()))?
}).await;
match send_result {
Ok(duration) => {
self.update_metrics("send", duration, true).await;
Ok(DeliveryReceipt {
message_id: message.id.clone(),
transport_used: TransportType::Quic,
delivery_time: duration,
target_reached: connection_id.clone(),
confirmation: DeliveryConfirmation::Delivered, // QUIC provides delivery confirmation
metadata: {
let mut map = HashMap::new();
map.insert("connection_id".to_string(), connection_id);
if let Some(addr) = &target.address {
map.insert("target_address".to_string(), addr.clone());
}
map.insert("protocol".to_string(), "QUIC".to_string());
map
},
})
}
Err(e) => {
self.update_metrics("send", Duration::from_secs(0), false).await;
Err(e)
}
}
}
async fn receive_messages(&self) -> Result<Vec<IncomingMessage>> {
let receive_result = self.circuit_breaker.call(async {
self.receive_quic_messages().await
}).await;
match receive_result {
Ok(messages) => {
if !messages.is_empty() {
self.update_metrics("receive", Duration::from_millis(1), true).await;
// Add messages to internal queue
let mut received = self.received_messages.lock().await;
received.extend(messages.clone());
}
Ok(messages)
}
Err(e) => {
self.update_metrics("receive", Duration::from_secs(0), false).await;
Err(e)
}
}
}
async fn test_connectivity(&self, target: &TransportTarget) -> Result<ConnectivityResult> {
let start_time = Instant::now();
if let Some(address) = &target.address {
let target_addr = address.parse::<SocketAddr>();
match target_addr {
Ok(addr) => {
// Try to establish a test connection
match self.connect_to_server(addr).await {
Ok(connection) => {
let rtt = start_time.elapsed();
let quic_rtt = connection.rtt.unwrap_or(Duration::from_millis(20));
// Clean up test connection
{
let mut connections = self.connections.lock().await;
connections.remove(&connection.id);
}
Ok(ConnectivityResult {
connected: true,
rtt: Some(rtt),
error: None,
quality: 0.95, // QUIC typically has high quality
details: {
let mut map = HashMap::new();
map.insert("target_address".to_string(), address.clone());
map.insert("connection_time_ms".to_string(), rtt.as_millis().to_string());
map.insert("quic_rtt_ms".to_string(), quic_rtt.as_millis().to_string());
map.insert("protocol".to_string(), "QUIC".to_string());
map
},
})
}
Err(e) => {
let rtt = start_time.elapsed();
Ok(ConnectivityResult {
connected: false,
rtt: Some(rtt),
error: Some(format!("QUIC connection failed: {}", e)),
quality: 0.0,
details: HashMap::new(),
})
}
}
}
Err(e) => {
Ok(ConnectivityResult {
connected: false,
rtt: None,
error: Some(format!("Invalid address: {}", e)),
quality: 0.0,
details: HashMap::new(),
})
}
}
} else {
Ok(ConnectivityResult {
connected: false,
rtt: None,
error: Some("No target address provided".to_string()),
quality: 0.0,
details: HashMap::new(),
})
}
}
async fn start(&self) -> Result<()> {
info!("Starting QUIC transport");
{
let mut status = self.status.write().await;
*status = TransportStatus::Starting;
}
// Start QUIC server
self.start_server().await?;
{
let mut status = self.status.write().await;
*status = TransportStatus::Running;
}
info!("QUIC transport started on {}", self.local_addr);
Ok(())
}
async fn stop(&self) -> Result<()> {
info!("Stopping QUIC transport");
{
let mut status = self.status.write().await;
*status = TransportStatus::Stopping;
}
// Close all connections
{
let mut connections = self.connections.lock().await;
connections.clear();
}
{
let mut status = self.status.write().await;
*status = TransportStatus::Stopped;
}
info!("QUIC transport stopped");
Ok(())
}
async fn status(&self) -> TransportStatus {
*self.status.read().await
}
async fn metrics(&self) -> TransportMetrics {
self.metrics.read().await.clone()
}
}