From bf789b614d05b7101b422be80531256faa0c0996 Mon Sep 17 00:00:00 2001
From: "mergify[bot]" <37929162+mergify[bot]@users.noreply.github.com>
Date: Tue, 6 Jun 2023 16:28:17 -0700
Subject: [PATCH] v1.16: Use QUIC Retry packets during handshake (backport of
 #31802) (#32000)

Use QUIC Retry packets during handshake (#31802)

Have the Quic server send a Retry packet to verify client control of the source IP

(cherry picked from commit 36222a44d72e7c511769d1929ba28768a26d3988)

Co-authored-by: ryleung-solana <91908731+ryleung-solana@users.noreply.github.com>
---
 streamer/src/quic.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/streamer/src/quic.rs b/streamer/src/quic.rs
index 3b326f182e97f5..20b013f010c104 100644
--- a/streamer/src/quic.rs
+++ b/streamer/src/quic.rs
@@ -71,6 +71,7 @@ pub(crate) fn configure_server(
     server_tls_config.alpn_protocols = vec![ALPN_TPU_PROTOCOL_ID.to_vec()];
 
     let mut server_config = ServerConfig::with_crypto(Arc::new(server_tls_config));
+    server_config.use_retry(true);
     let config = Arc::get_mut(&mut server_config.transport).unwrap();
 
     // QUIC_MAX_CONCURRENT_STREAMS doubled, which was found to improve reliability