From 4bf50457dcf3488bce904486447577df34e558cd Mon Sep 17 00:00:00 2001
From: Simon Ser <contact@emersion.fr>
Date: Thu, 3 Feb 2022 10:22:53 +0100
Subject: [PATCH] Ignore EOF on tls.Conn.Handshake

This happens when using the tls-alpn-01 challange.
---
 server.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/server.go b/server.go
index d974770..ae01cfa 100644
--- a/server.go
+++ b/server.go
@@ -288,7 +288,9 @@ func (ln *Listener) handle(conn net.Conn) error {
 	if err := tlsConn.SetDeadline(time.Now().Add(tlsHandshakeTimeout)); err != nil {
 		return fmt.Errorf("failed to set TLS handshake timeout: %v", err)
 	}
-	if err := tlsConn.Handshake(); err != nil {
+	if err := tlsConn.Handshake(); err == io.EOF {
+		return nil
+	} else if err != nil {
 		return fmt.Errorf("TLS handshake failed: %v", err)
 	}
 	if err := tlsConn.SetDeadline(time.Time{}); err != nil {