From 00e722f02cfaf2d5dd6759730c96614ced89da9f Mon Sep 17 00:00:00 2001 From: Tatsuhiro Tsujikawa Date: Thu, 4 Feb 2016 23:27:22 +0900 Subject: [PATCH] Add warning --- lib/includes/nghttp2/nghttp2.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/lib/includes/nghttp2/nghttp2.h b/lib/includes/nghttp2/nghttp2.h index 5f389a6e..59fc8674 100644 --- a/lib/includes/nghttp2/nghttp2.h +++ b/lib/includes/nghttp2/nghttp2.h @@ -1608,6 +1608,14 @@ typedef int (*nghttp2_on_begin_headers_callback)(nghttp2_session *session, * * To set this callback to :type:`nghttp2_session_callbacks`, use * `nghttp2_session_callbacks_set_on_header_callback()`. + * + * .. warning:: + * + * Application should properly limit the total buffer size to store + * incoming header fields. Without it, peer may send large number + * of header fields or large header fields to cause out of memory in + * local endpoint. Due to how HPACK works, peer can do this + * effectively without using much memory on their own. */ typedef int (*nghttp2_on_header_callback)(nghttp2_session *session, const nghttp2_frame *frame,