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QUIC: fixed congestion window check in ngx_quic_allow_segmentation().

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QUIC segmentation could be skipped when f->len exceeds 3 * mtu and the
available congestion window is between 3 * mtu and f->len, because
accumulated queued bytes were checked before the batching threshold.
This commit is contained in:
nandsky 2026-05-09 15:11:34 +08:00
parent 475732a3f9
commit 14f073abf2
1 changed files with 4 additions and 4 deletions
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8
src/event/quic/ngx_event_quic_output.c
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@ -310,6 +310,10 @@ ngx_quic_allow_segmentation(ngx_connection_t *c)
bytes = 0;
len = ngx_min(qc->path->mtu, NGX_QUIC_MAX_UDP_SEGMENT_BUF);
if (qc->congestion.in_flight + len * 3 >= qc->congestion.window) {
return 0;
}
for (q = ngx_queue_head(&ctx->frames);
q != ngx_queue_sentinel(&ctx->frames);
q = ngx_queue_next(q))
@ -318,10 +322,6 @@ ngx_quic_allow_segmentation(ngx_connection_t *c)
bytes += f->len;
if (qc->congestion.in_flight + bytes >= qc->congestion.window) {
return 0;
}
if (bytes > len * 3) {
/* require at least ~3 full packets to batch */
return 1;