91 lines
2.9 KiB
Rust
91 lines
2.9 KiB
Rust
use std::collections::{HashMap, HashSet};
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use std::net::SocketAddr;
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use std::sync::Arc;
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use std::time::{Duration, Instant};
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use tracing::{debug, info, warn};
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use rand::seq::SliceRandom;
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use crate::crypto::SecureRandom;
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use crate::network::IpFamily;
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use super::MePool;
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pub async fn me_health_monitor(pool: Arc<MePool>, rng: Arc<SecureRandom>, _min_connections: usize) {
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let mut backoff: HashMap<(i32, IpFamily), u64> = HashMap::new();
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let mut last_attempt: HashMap<(i32, IpFamily), Instant> = HashMap::new();
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loop {
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tokio::time::sleep(Duration::from_secs(30)).await;
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check_family(IpFamily::V4, &pool, &rng, &mut backoff, &mut last_attempt).await;
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check_family(IpFamily::V6, &pool, &rng, &mut backoff, &mut last_attempt).await;
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}
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}
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async fn check_family(
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family: IpFamily,
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pool: &Arc<MePool>,
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rng: &Arc<SecureRandom>,
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backoff: &mut HashMap<(i32, IpFamily), u64>,
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last_attempt: &mut HashMap<(i32, IpFamily), Instant>,
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) {
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let enabled = match family {
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IpFamily::V4 => pool.decision.ipv4_me,
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IpFamily::V6 => pool.decision.ipv6_me,
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};
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if !enabled {
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return;
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}
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let map = match family {
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IpFamily::V4 => pool.proxy_map_v4.read().await.clone(),
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IpFamily::V6 => pool.proxy_map_v6.read().await.clone(),
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};
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let writer_addrs: HashSet<SocketAddr> = pool
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.writers
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.read()
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.await
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.iter()
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.map(|w| w.addr)
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.collect();
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for (dc, addrs) in map.iter() {
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let dc_addrs: Vec<SocketAddr> = addrs
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.iter()
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.map(|(ip, port)| SocketAddr::new(*ip, *port))
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.collect();
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let has_coverage = dc_addrs.iter().any(|a| writer_addrs.contains(a));
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if has_coverage {
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continue;
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}
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let key = (*dc, family);
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let delay = *backoff.get(&key).unwrap_or(&30);
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let now = Instant::now();
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if let Some(last) = last_attempt.get(&key) {
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if now.duration_since(*last).as_secs() < delay {
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continue;
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}
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}
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warn!(dc = %dc, delay, ?family, "DC has no ME coverage, reconnecting...");
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let mut shuffled = dc_addrs.clone();
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shuffled.shuffle(&mut rand::rng());
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let mut reconnected = false;
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for addr in shuffled {
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match pool.connect_one(addr, rng.as_ref()).await {
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Ok(()) => {
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info!(%addr, dc = %dc, ?family, "ME reconnected for DC coverage");
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backoff.insert(key, 30);
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last_attempt.insert(key, now);
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reconnected = true;
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break;
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}
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Err(e) => debug!(%addr, dc = %dc, error = %e, ?family, "ME reconnect failed"),
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}
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}
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if !reconnected {
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let next = (*backoff.get(&key).unwrap_or(&30)).saturating_mul(2).min(300);
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backoff.insert(key, next);
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last_attempt.insert(key, now);
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}
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}
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}
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