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QUIC: lower bound path validation PTO.

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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.
This commit is contained in:
Sergey Kandaurov 2023-05-09 19:42:40 +04:00
parent f706744165
commit 894679804b
1 changed files with 2 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

4
src/event/quic/ngx_event_quic_migration.c
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@ -511,7 +511,7 @@ ngx_quic_validate_path(ngx_connection_t *c, ngx_quic_path_t *path)
}
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_event_t *ev)
}
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;