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QUIC: use path MTU in congestion window computations.

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As per RFC 9002, Section B.2, max_datagram_size used in congestion window
computations should be based on path MTU.
This commit is contained in:
Roman Arutyunyan 2025-01-03 11:17:07 +04:00 committed by Roman Arutyunyan
parent 3a97111adf
commit 53e7e9eb54
3 changed files with 8 additions and 8 deletions
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4
src/event/quic/ngx_event_quic.c
View File

@ -308,8 +308,8 @@ ngx_quic_new_connection(ngx_connection_t *c, ngx_quic_conf_t *conf,
qc->streams.client_max_streams_uni = qc->tp.initial_max_streams_uni;
qc->streams.client_max_streams_bidi = qc->tp.initial_max_streams_bidi;
qc->congestion.window = ngx_min(10 * qc->tp.max_udp_payload_size,
ngx_max(2 * qc->tp.max_udp_payload_size,
qc->congestion.window = ngx_min(10 * NGX_QUIC_MIN_INITIAL_SIZE,
ngx_max(2 * NGX_QUIC_MIN_INITIAL_SIZE,
14720));
qc->congestion.ssthresh = (size_t) -1;
qc->congestion.recovery_start = ngx_current_msec;

8
src/event/quic/ngx_event_quic_ack.c
View File

@ -353,7 +353,7 @@ ngx_quic_congestion_ack(ngx_connection_t *c, ngx_quic_frame_t *f)
now, cg->window, cg->ssthresh, cg->in_flight);
} else {
cg->window += qc->tp.max_udp_payload_size * f->plen / cg->window;
cg->window += (uint64_t) qc->path->mtu * f->plen / cg->window;
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic congestion ack reno t:%M win:%uz if:%uz",
@ -552,7 +552,7 @@ ngx_quic_persistent_congestion(ngx_connection_t *c)
now = ngx_current_msec;
cg->recovery_start = now;
cg->window = qc->tp.max_udp_payload_size * 2;
cg->window = qc->path->mtu * 2;
ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic congestion persistent t:%M win:%uz", now, cg->window);
@ -698,8 +698,8 @@ ngx_quic_congestion_lost(ngx_connection_t *c, ngx_quic_frame_t *f)
cg->recovery_start = now;
cg->window /= 2;
if (cg->window < qc->tp.max_udp_payload_size * 2) {
cg->window = qc->tp.max_udp_payload_size * 2;
if (cg->window < qc->path->mtu * 2) {
cg->window = qc->path->mtu * 2;
}
cg->ssthresh = cg->window;

4
src/event/quic/ngx_event_quic_migration.c
View File

@ -182,8 +182,8 @@ valid:
ngx_memzero(&qc->congestion, sizeof(ngx_quic_congestion_t));
qc->congestion.window = ngx_min(10 * qc->tp.max_udp_payload_size,
ngx_max(2 * qc->tp.max_udp_payload_size,
qc->congestion.window = ngx_min(10 * NGX_QUIC_MIN_INITIAL_SIZE,
ngx_max(2 * NGX_QUIC_MIN_INITIAL_SIZE,
14720));
qc->congestion.ssthresh = (size_t) -1;
qc->congestion.recovery_start = ngx_current_msec;