# HG changeset patch
# User Valentin Bartenev <vbart@nginx.com>
# Date 1466099711 -10800
# Node ID dc5eaf998b96d6b6d724de56daaa1c32db2d3a15
# Parent  d45845a6c96a056ba61f692c6a72bd372af62abb
HTTP/2: prevented double termination of a stream.

According to RFC 7540, an endpoint should not send more than one RST_STREAM
frame for any stream.

Also, now all the data frames will be skipped while termination.

diff -r d45845a6c96a -r dc5eaf998b96 src/http/v2/ngx_http_v2.c
--- a/src/http/v2/ngx_http_v2.c	Thu Jun 16 20:55:11 2016 +0300
+++ b/src/http/v2/ngx_http_v2.c	Thu Jun 16 20:55:11 2016 +0300
@@ -3890,6 +3890,10 @@
     ngx_event_t       *rev;
     ngx_connection_t  *fc;
 
+    if (stream->rst_sent) {
+        return NGX_OK;
+    }
+
     if (ngx_http_v2_send_rst_stream(h2c, stream->node->id, status)
         == NGX_ERROR)
     {
@@ -3897,6 +3901,7 @@
     }
 
     stream->rst_sent = 1;
+    stream->skip_data = 1;
 
     fc = stream->request->connection;
     fc->error = 1;