From 98c437e98e7641cdaba0181cff1ea31050989273 Mon Sep 17 00:00:00 2001
From: Marten Seemann <martenseemann@gmail.com>
Date: Fri, 25 Sep 2020 17:11:22 +0700
Subject: [PATCH] fail the handshake if the quic_transport_parameter extension
 is missing

---
 internal/handshake/crypto_setup.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/internal/handshake/crypto_setup.go b/internal/handshake/crypto_setup.go
index 7e0bb99a9..2d7826cb5 100644
--- a/internal/handshake/crypto_setup.go
+++ b/internal/handshake/crypto_setup.go
@@ -341,7 +341,11 @@ readLoop:
 	for {
 		select {
 		case data := <-h.paramsChan:
-			h.handleTransportParameters(data)
+			if data == nil {
+				h.onError(0x6d, "missing quic_transport_parameters extension")
+			} else {
+				h.handleTransportParameters(data)
+			}
 		case <-h.isReadingHandshakeMessage:
 			break readLoop
 		case <-h.handshakeDone: