Mercurial > hg > nginx
diff src/event/quic/ngx_event_quic_ack.c @ 9096:c6db94ec3841 quic
QUIC: separated path validation retransmit backoff.
Path validation packets containing PATH_CHALLENGE frames are sent separately
from regular frame queue, because of the need to use a decicated path and pad
the packets. The packets are sent periodically, separately from the regular
probe/lost detection mechanism. A path validation packet is resent up to 3
times, each time after PTO expiration, with increasing per-path PTO backoff.
| author | Sergey Kandaurov <pluknet@nginx.com> |
|---|---|
| date | Tue, 09 May 2023 19:42:39 +0400 |
| parents | 52cddd44ec11 |
| children | d59277dd3d8c |
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--- a/src/event/quic/ngx_event_quic_ack.c +++ b/src/event/quic/ngx_event_quic_ack.c @@ -736,7 +736,8 @@ ngx_quic_set_lost_timer(ngx_connection_t q = ngx_queue_last(&ctx->sent); f = ngx_queue_data(q, ngx_quic_frame_t, queue); - w = (ngx_msec_int_t) (f->last + ngx_quic_pto(c, ctx) - now); + w = (ngx_msec_int_t) (f->last + (ngx_quic_pto(c, ctx) << qc->pto_count) + - now); if (w < 0) { w = 0; @@ -785,10 +786,9 @@ ngx_quic_pto(ngx_connection_t *c, ngx_qu duration = qc->avg_rtt; duration += ngx_max(4 * qc->rttvar, NGX_QUIC_TIME_GRANULARITY); - duration <<= qc->pto_count; if (ctx->level == ssl_encryption_application && c->ssl->handshaked) { - duration += qc->ctp.max_ack_delay << qc->pto_count; + duration += qc->ctp.max_ack_delay; } return duration; @@ -846,7 +846,9 @@ ngx_quic_pto_handler(ngx_event_t *ev) continue; } - if ((ngx_msec_int_t) (f->last + ngx_quic_pto(c, ctx) - now) > 0) { + if ((ngx_msec_int_t) (f->last + (ngx_quic_pto(c, ctx) << qc->pto_count) + - now) > 0) + { continue; }