From 1bf489b7afc54712fd66e6a981833682be6e2ffb Mon Sep 17 00:00:00 2001
From: Marten Seemann <martenseemann@gmail.com>
Date: Tue, 21 May 2019 15:28:38 +0100
Subject: [PATCH] open a control stream and send a SETTINGS frame as an H3
 server

---
 http3/server.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/http3/server.go b/http3/server.go
index 558d9d9a..917b0bae 100644
--- a/http3/server.go
+++ b/http3/server.go
@@ -1,6 +1,7 @@
 package http3
 
 import (
+	"bytes"
 	"crypto/tls"
 	"errors"
 	"fmt"
@@ -125,6 +126,16 @@ func (s *Server) handleConn(sess quic.Session) {
 	// TODO: accept control streams
 	decoder := qpack.NewDecoder(nil)
 
+	// send a SETTINGS frame
+	str, err := sess.OpenUniStreamSync()
+	if err != nil {
+		s.logger.Debugf("Opening the control stream failed.")
+		return
+	}
+	buf := bytes.NewBuffer([]byte{0})
+	(&settingsFrame{}).Write(buf)
+	str.Write(buf.Bytes())
+
 	for {
 		str, err := sess.AcceptStream()
 		if err != nil {