# HG changeset patch
# User Sergey Kandaurov <pluknet@nginx.com>
# Date 1603361150 -3600
# Node ID 06af25901b1ad296d33a118bb6b2d81b04eb4dfa
# Parent  c01964fd7b8b7f5f6a3320c826ca6e7872c5c748
QUIC: restored proper usage of ngx_quic_drop_ack_ranges().

ACK Ranges are again managed based on the remembered Largest Acknowledged
sent in the packet being acknowledged, which partially reverts c01964fd7b8b.

diff --git a/src/event/ngx_event_quic.c b/src/event/ngx_event_quic.c
--- a/src/event/ngx_event_quic.c
+++ b/src/event/ngx_event_quic.c
@@ -2799,8 +2799,6 @@ ngx_quic_handle_ack_frame(ngx_connection
         }
     }
 
-    ngx_quic_drop_ack_ranges(c, ctx, ack->largest);
-
     pos = ack->ranges_start;
     end = ack->ranges_end;
 
@@ -2871,6 +2869,10 @@ ngx_quic_handle_ack_frame_range(ngx_conn
             ngx_quic_congestion_ack(c, f);
 
             switch (f->type) {
+            case NGX_QUIC_FT_ACK:
+            case NGX_QUIC_FT_ACK_ECN:
+                ngx_quic_drop_ack_ranges(c, ctx, f->u.ack.largest);
+                break;
 
             case NGX_QUIC_FT_STREAM0:
             case NGX_QUIC_FT_STREAM1: