From 5cff9ab5f7267c71d5074db0c08926084cdb112e Mon Sep 17 00:00:00 2001
From: Matthias Einwag <einwag@amazon.com>
Date: Wed, 17 Feb 2021 18:22:58 +0000
Subject: [PATCH] Set `segment_size` based on the amount of sent datagrams

The option only needs to be sent for GSO (multiple datagrams
in a buffer).
---
 quinn-proto/src/connection/mod.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/quinn-proto/src/connection/mod.rs b/quinn-proto/src/connection/mod.rs
index b5501665d..85a787fa8 100644
--- a/quinn-proto/src/connection/mod.rs
+++ b/quinn-proto/src/connection/mod.rs
@@ -556,7 +556,10 @@ where
             } else {
                 None
             },
-            segment_size: None,
+            segment_size: match num_datagrams {
+                1 => None,
+                _ => Some(self.path.mtu as usize),
+            },
             src_ip: self.local_ip,
         })
     }