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Increased default initial retransmit timeout.

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This is a temporary workaround, proper retransmission mechanism based on
quic-recovery rfc draft is yet to be implemented.

Currently hardcoded value is too small for real networks.  The patch
sets static PTO, considering rtt of ~333ms, what gives about 1s.
This commit is contained in:
Vladimir Homutov 2020-06-10 21:33:20 +03:00
parent d684a69c68
commit 5cef58452d
1 changed files with 5 additions and 3 deletions
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8
src/event/ngx_event_quic.c
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@ -3058,7 +3058,8 @@ ngx_quic_output(ngx_connection_t *c)
}
if (!qc->retransmit.timer_set && !qc->closing) {
ngx_add_timer(&qc->retransmit, qc->ctp.max_ack_delay);
ngx_add_timer(&qc->retransmit,
qc->ctp.max_ack_delay + NGX_QUIC_HARDCODED_PTO);
}
return NGX_OK;
@ -3414,7 +3415,8 @@ ngx_quic_retransmit(ngx_connection_t *c, ngx_quic_send_ctx_t *ctx,
do {
start = ngx_queue_data(q, ngx_quic_frame_t, queue);
wait = start->last + qc->ctp.max_ack_delay - now;
wait = start->last + qc->ctp.max_ack_delay
+ NGX_QUIC_HARDCODED_PTO - now;
if ((ngx_msec_int_t) wait > 0) {
break;
@ -3455,7 +3457,7 @@ ngx_quic_retransmit(ngx_connection_t *c, ngx_quic_send_ctx_t *ctx,
/* move frames group to the end of queue */
ngx_queue_add(&ctx->sent, &range);
wait = qc->tp.max_ack_delay;
wait = qc->ctp.max_ack_delay + NGX_QUIC_HARDCODED_PTO;
} while (q != ngx_queue_sentinel(&ctx->sent));