From: Piotr Sikora <piotrsikora@google.com>
Date: Fri, 2 Jun 2017 12:05:32 +0000 (+0300)
Subject: HTTP/2: don't send SETTINGS ACK before already queued DATA frames.
X-Git-Url: http://www.kaiwu.me/postgresql/commit/static/gitweb.js?a=commitdiff_plain;h=51a4a414ca051c779ac90a566bd50c0a1ecd6a40;p=nginx.git

HTTP/2: don't send SETTINGS ACK before already queued DATA frames.

Previously, SETTINGS ACK was sent immediately upon receipt of SETTINGS
frame, before already queued DATA frames created using old SETTINGS.

This incorrect behavior was source of interoperability issues, because
peers rely on the fact that new SETTINGS are in effect after receiving
SETTINGS ACK.

Reported by Feng Li.

Signed-off-by: Piotr Sikora <piotrsikora@google.com>
---

diff --git a/src/http/v2/ngx_http_v2.c b/src/http/v2/ngx_http_v2.c
index d4ee8cc24..8e1b7aed4 100644
--- a/src/http/v2/ngx_http_v2.c
+++ b/src/http/v2/ngx_http_v2.c
@@ -2032,7 +2032,7 @@ ngx_http_v2_state_settings_params(ngx_http_v2_connection_t *h2c, u_char *pos,
         return ngx_http_v2_connection_error(h2c, NGX_HTTP_V2_INTERNAL_ERROR);
     }
 
-    ngx_http_v2_queue_blocked_frame(h2c, frame);
+    ngx_http_v2_queue_ordered_frame(h2c, frame);
 
     if (window_delta) {
         if (ngx_http_v2_adjust_windows(h2c, window_delta) != NGX_OK) {
diff --git a/src/http/v2/ngx_http_v2.h b/src/http/v2/ngx_http_v2.h
index be34a0933..4804658eb 100644
--- a/src/http/v2/ngx_http_v2.h
+++ b/src/http/v2/ngx_http_v2.h
@@ -261,6 +261,15 @@ ngx_http_v2_queue_blocked_frame(ngx_http_v2_connection_t *h2c,
 }
 
 
+static ngx_inline void
+ngx_http_v2_queue_ordered_frame(ngx_http_v2_connection_t *h2c,
+    ngx_http_v2_out_frame_t *frame)
+{
+    frame->next = h2c->last_out;
+    h2c->last_out = frame;
+}
+
+
 void ngx_http_v2_init(ngx_event_t *rev);
 void ngx_http_v2_request_headers_init(void);