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QUIC: avoided retransmission of stale ack frames.

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Acknowledgments are regenerated using the most recent data available.
This commit is contained in:
Vladimir Homutov 2020-10-28 14:22:51 +03:00
parent 54187d2d7a
commit 21a5955f75
1 changed files with 14 additions and 3 deletions
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17
src/event/ngx_event_quic.c
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@ -4843,6 +4843,8 @@ ngx_quic_resend_frames(ngx_connection_t *c, ngx_quic_send_ctx_t *ctx)
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic resend packet pnum:%uL", start->pnum);
ngx_quic_congestion_lost(c, start);
do {
f = ngx_queue_data(q, ngx_quic_frame_t, queue);
@ -4853,12 +4855,21 @@ ngx_quic_resend_frames(ngx_connection_t *c, ngx_quic_send_ctx_t *ctx)
q = ngx_queue_next(q);
ngx_queue_remove(&f->queue);
ngx_queue_insert_tail(&ctx->frames, &f->queue);
switch (f->type) {
case NGX_QUIC_FT_ACK:
case NGX_QUIC_FT_ACK_ECN:
/* force generation of most recent acknowledgment */
ctx->send_ack = NGX_QUIC_MAX_ACK_GAP;
ngx_quic_free_frame(c, f);
break;
default:
ngx_queue_insert_tail(&ctx->frames, &f->queue);
}
} while (q != ngx_queue_sentinel(&ctx->sent));
ngx_quic_congestion_lost(c, start);
if (qc->closing) {
return;
}