From acd6b40e4cd2efe1f197f6f7bea4663fb9a27372 Mon Sep 17 00:00:00 2001
From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
Date: Mon, 8 Jan 2018 17:03:48 +0900
Subject: [PATCH] Allow PING frame to be sent after GOAWAY

---
 lib/nghttp2_session.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/nghttp2_session.c b/lib/nghttp2_session.c
index b14ed77a..c4bbf274 100644
--- a/lib/nghttp2_session.c
+++ b/lib/nghttp2_session.c
@@ -2225,8 +2225,9 @@ static int session_prep_frame(nghttp2_session *session,
       assert(session->obq_flood_counter_ > 0);
       --session->obq_flood_counter_;
     }
-
-    if (session_is_closing(session)) {
+    /* PING frame is allowed to be sent unless termination GOAWAY is
+       sent */
+    if (session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND) {
       return NGHTTP2_ERR_SESSION_CLOSING;
     }
     nghttp2_frame_pack_ping(&session->aob.framebufs, &frame->ping);