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comparison src/event/quic/ngx_event_quic_migration.c @ 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
comparison
equal deleted inserted replaced
9082:c6db94ec3841 9083:a9fef6ca45a8
509 if (ngx_quic_send_path_challenge(c, path) != NGX_OK) { 509 if (ngx_quic_send_path_challenge(c, path) != NGX_OK) {
510 return NGX_ERROR; 510 return NGX_ERROR;
511 } 511 }
512 512
513 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); 513 ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application);
514 pto = ngx_quic_pto(c, ctx); 514 pto = ngx_max(ngx_quic_pto(c, ctx), 1000);
515 515
516 path->expires = ngx_current_msec + pto; 516 path->expires = ngx_current_msec + pto;
517 517
518 if (!qc->path_validation.timer_set) { 518 if (!qc->path_validation.timer_set) {
519 ngx_add_timer(&qc->path_validation, pto); 519 ngx_add_timer(&qc->path_validation, pto);
603 603
604 continue; 604 continue;
605 } 605 }
606 606
607 if (++path->tries < NGX_QUIC_PATH_RETRIES) { 607 if (++path->tries < NGX_QUIC_PATH_RETRIES) {
608 pto = ngx_quic_pto(c, ctx) << path->tries; 608 pto = ngx_max(ngx_quic_pto(c, ctx), 1000) << path->tries;
609 609
610 path->expires = ngx_current_msec + pto; 610 path->expires = ngx_current_msec + pto;
611 611
612 if (next == -1 || pto < next) { 612 if (next == -1 || pto < next) {
613 next = pto; 613 next = pto;