From 1fa552cbe353e6467d33bd9366712ad150f06af0 Mon Sep 17 00:00:00 2001
From: Irine Sistiana <49315432+IrineSistiana@users.noreply.github.com>
Date: Sat, 23 Sep 2023 14:29:25 +0800
Subject: [PATCH 9/9] upstream/doq: send STREAM FIN after query is sent

fixed #720
---
 pkg/upstream/doq/upstream.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pkg/upstream/doq/upstream.go b/pkg/upstream/doq/upstream.go
index 23d7f1c..78d30db 100644
--- a/pkg/upstream/doq/upstream.go
+++ b/pkg/upstream/doq/upstream.go
@@ -242,6 +242,14 @@ func (u *Upstream) exchange(s quic.Stream, payload []byte) (*dns.Msg, error) {
 		return nil, err
 	}
 
+	// RFC 9250 4.2
+	//    The client MUST send the DNS query over the selected stream and MUST
+	//    indicate through the STREAM FIN mechanism that no further data will
+	//    be sent on that stream.
+	//
+	// Call Close() here will send the STREAM FIN. It won't close Read.
+	s.Close()
+
 	resp, _, err := dnsutils.ReadMsgFromTCP(s)
 	if err != nil {
 		return nil, err
-- 
2.34.8