From 842a930b88c6103a793d210826813f09d7fa84a7 Mon Sep 17 00:00:00 2001
From: Roman Arutyunyan <arut@nginx.com>
Date: Tue, 1 Aug 2023 11:21:59 +0400
Subject: QUIC: fixed PTO expiration condition.

Previously, PTO handler analyzed the first packet in the sent queue for the
timeout expiration.  However, the last sent packet should be analyzed instead.
An example is timeout calculation in ngx_quic_set_lost_timer().
---
 src/event/quic/ngx_event_quic_ack.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/event/quic/ngx_event_quic_ack.c b/src/event/quic/ngx_event_quic_ack.c
index e6210653a..04fc66760 100644
--- a/src/event/quic/ngx_event_quic_ack.c
+++ b/src/event/quic/ngx_event_quic_ack.c
@@ -840,7 +840,7 @@ ngx_quic_pto_handler(ngx_event_t *ev)
             continue;
         }
 
-        q = ngx_queue_head(&ctx->sent);
+        q = ngx_queue_last(&ctx->sent);
         f = ngx_queue_data(q, ngx_quic_frame_t, queue);
 
         if (f->pnum <= ctx->largest_ack
-- 
cgit