From c930f1b58ca887d70bc1fc0199a8183fcd7dd663 Mon Sep 17 00:00:00 2001
From: Arun Koshy <arun@mystenlabs.com>
Date: Thu, 21 Mar 2024 00:03:56 -0700
Subject: [PATCH] Adjust mtu

---
 crates/anemo/src/config.rs | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/crates/anemo/src/config.rs b/crates/anemo/src/config.rs
index 3243d6b..8afceeb 100644
--- a/crates/anemo/src/config.rs
+++ b/crates/anemo/src/config.rs
@@ -3,7 +3,7 @@ use crate::{
     PeerId, Result,
 };
 use pkcs8::EncodePrivateKey;
-use quinn::{congestion, VarInt};
+use quinn::{congestion, MtuDiscoveryConfig, VarInt};
 use rcgen::{CertificateParams, KeyPair, SignatureAlgorithm};
 use serde::{Deserialize, Serialize};
 use std::{sync::Arc, time::Duration};
@@ -347,7 +347,15 @@ impl QuicConfig {
         cc_config.initial_window(4 << 20);
         // todo: find replacement, minimum window no longer supported
         // cc_config.minimum_window(1 << 20);
-        config.congestion_controller_factory(Arc::new(cc_config));
+
+        let mut mtu_discovery = MtuDiscoveryConfig::default();
+        mtu_discovery.upper_bound(1500);
+        config.mtu_discovery_config(Some(mtu_discovery));
+
+        config
+            .congestion_controller_factory(Arc::new(cc_config))
+            .initial_mtu(1500)
+            .min_mtu(1500);
 
         config
     }