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ostp
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fix: resolve deadlock, multiplexing backpressure, and LTE fragmentation issues

This commit is contained in:
ospab 2026-05-30 22:21:12 +03:00
parent 8771f17371
commit c9fad99144
4 changed files with 9 additions and 9 deletions
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4
ostp-client/src/bridge.rs
View File

@ -617,8 +617,8 @@ impl Bridge {
}
}
proxy_ev = proxy_rx.recv(), if self.running && sessions_opt.as_ref().map(|s| {
// Backpressure: suspend proxy reads when ARQ window is saturated
s.iter().all(|ses| ses.machine.in_flight_count() < ses.machine.cwnd_packets().clamp(16, 16384))
// Backpressure: suspend proxy reads when ARQ window is saturated across ALL sessions
s.iter().any(|ses| ses.machine.in_flight_count() < ses.machine.cwnd_packets().clamp(16, 16384))
}).unwrap_or(true) => {
if let Some(ev) = proxy_ev {
if let Some(sessions) = sessions_opt.as_mut() {

2
ostp-client/src/config.rs
View File

@ -58,7 +58,7 @@ pub struct OstpConfig {
fn default_keepalive() -> u64 { 5 }
fn default_mtu() -> usize { 1500 }
fn default_mtu() -> usize { 1140 }
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct LocalProxyConfig {

10
ostp-core/src/protocol.rs
View File

@ -557,9 +557,6 @@ impl ProtocolMachine {
// Limit retransmits per tick to prevent bandwidth saturation
let mut retransmit_budget: usize = self.cc.retransmit_budget();
for frame in self.sent_history.iter_mut() {
if retransmit_budget == 0 {
break;
}
if !frame.is_retransmittable {
continue;
}
@ -571,8 +568,11 @@ impl ProtocolMachine {
if now.duration_since(frame.last_sent) >= effective_rto {
frame.last_sent = now;
frame.retries = frame.retries.saturating_add(1);
actions.push(ProtocolAction::SendDatagram(frame.bytes.clone()));
retransmit_budget -= 1;
if retransmit_budget > 0 {
actions.push(ProtocolAction::SendDatagram(frame.bytes.clone()));
retransmit_budget -= 1;
}
}
}

2
ostp-flutter/android/app/src/main/kotlin/com/ospab/ostp_client/OstpVpnService.kt
View File

@ -161,7 +161,7 @@ class OstpVpnService : VpnService() {
.addRoute("0.0.0.0", 0)
.addRoute("::", 0)
.addDnsServer(dnsServer)
.setMtu(json.optJSONObject("ostp")?.optInt("mtu", 1280) ?: 1280)
.setMtu(json.optJSONObject("ostp")?.optInt("mtu", 1140) ?: 1140)
try { builder.addDnsServer("8.8.8.8") } catch (e: Throwable) {}