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changeset 9083:a9fef6ca45a8 quic

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QUIC: lower bound path validation PTO. According to RFC 9000, 8.2.4. Failed Path Validation, the following value is recommended as a validation timeout: A value of three times the larger of the current PTO or the PTO for the new path (using kInitialRtt, as defined in [QUIC-RECOVERY]) is RECOMMENDED. The change adds PTO of the new path to the equation as the lower bound.
author Sergey Kandaurov <pluknet@nginx.com>
date Tue, 09 May 2023 19:42:40 +0400
parents c6db94ec3841
children d565cf69ff5d
files src/event/quic/ngx_event_quic_migration.c
diffstat 1 files changed, 2 insertions(+), 2 deletions(-) [+]
line wrap: on
line diff
--- a/src/event/quic/ngx_event_quic_migration.c
+++ b/src/event/quic/ngx_event_quic_migration.c
@@ -511,7 +511,7 @@ ngx_quic_validate_path(ngx_connection_t 
     }
 
     ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
-    pto = ngx_quic_pto(c, ctx);
+    pto = ngx_max(ngx_quic_pto(c, ctx), 1000);
 
     path->expires = ngx_current_msec + pto;
 
@@ -605,7 +605,7 @@ ngx_quic_path_validation_handler(ngx_eve
         }
 
         if (++path->tries < NGX_QUIC_PATH_RETRIES) {
-            pto = ngx_quic_pto(c, ctx) << path->tries;
+            pto = ngx_max(ngx_quic_pto(c, ctx), 1000) << path->tries;
 
             path->expires = ngx_current_msec + pto;