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Output buffering.

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Currently, the output is called periodically, each 200 ms to invoke
ngx_quic_output() that will push all pending frames into packets.

TODO: implement flags a-là Nagle & co (NO_DELAY/NO_PUSH...)
This commit is contained in:
Vladimir Homutov 2020-04-01 17:09:11 +03:00
parent 7b1a3df37c
commit 01bddf4533
1 changed files with 39 additions and 3 deletions
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42
src/event/ngx_event_quic.c
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@ -69,6 +69,7 @@ struct ngx_quic_connection_s {
ngx_ssl_t *ssl;
ngx_event_t push;
ngx_event_t retry;
ngx_queue_t free_frames;
@ -145,6 +146,7 @@ static ngx_int_t ngx_quic_send_frames(ngx_connection_t *c, ngx_queue_t *frames);
static void ngx_quic_retransmit_handler(ngx_event_t *ev);
static ngx_int_t ngx_quic_retransmit_ns(ngx_connection_t *c,
ngx_quic_namespace_t *ns, ngx_msec_t *waitp);
static void ngx_quic_push_handler(ngx_event_t *ev);
static void ngx_quic_rbtree_insert_stream(ngx_rbtree_node_t *temp,
ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel);
@ -464,6 +466,11 @@ ngx_quic_new_connection(ngx_connection_t *c, ngx_ssl_t *ssl, ngx_quic_tp_t *tp,
qc->retry.handler = ngx_quic_retransmit_handler;
qc->retry.cancelable = 1;
qc->push.log = c->log;
qc->push.data = c;
qc->push.handler = ngx_quic_push_handler;
qc->push.cancelable = 1;
c->quic = qc;
qc->ssl = ssl;
qc->tp = *tp;
@ -713,6 +720,10 @@ ngx_quic_close_connection(ngx_connection_t *c)
return;
}
if (qc->push.timer_set) {
ngx_del_timer(&qc->push);
}
if (qc->retry.timer_set) {
ngx_del_timer(&qc->retry);
}
@ -1163,7 +1174,8 @@ ngx_quic_payload_handler(ngx_connection_t *c, ngx_quic_header_t *pkt)
ngx_sprintf(ack_frame->info, "ACK for PN=%d from frame handler level=%d", pkt->pn, ack_frame->level);
ngx_quic_queue_frame(qc, ack_frame);
return ngx_quic_output(c);
// TODO: call output() after processing some special frames?
return NGX_OK;
}
@ -1471,6 +1483,12 @@ ngx_quic_queue_frame(ngx_quic_connection_t *qc, ngx_quic_frame_t *frame)
ns = &qc->ns[ngx_quic_ns(frame->level)];
ngx_queue_insert_tail(&ns->frames, &frame->queue);
/* TODO: check PUSH flag on stream and call output */
if (!qc->push.timer_set && !qc->closing) {
ngx_add_timer(&qc->push, qc->tp.max_ack_delay);
}
}
@ -1742,6 +1760,26 @@ ngx_quic_retransmit_handler(ngx_event_t *ev)
}
static void
ngx_quic_push_handler(ngx_event_t *ev)
{
ngx_connection_t *c;
ngx_quic_connection_t *qc;
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0, "push timer");
c = ev->data;
qc = c->quic;
if (ngx_quic_output(c) != NGX_OK) {
ngx_quic_close_connection(c);
return;
}
ngx_add_timer(&qc->push, qc->tp.max_ack_delay);
}
static ngx_int_t
ngx_quic_retransmit_ns(ngx_connection_t *c, ngx_quic_namespace_t *ns,
ngx_msec_t *waitp)
@ -2060,8 +2098,6 @@ ngx_quic_stream_send(ngx_connection_t *c, u_char *buf, size_t size)
ngx_quic_queue_frame(qc, frame);
ngx_quic_output(pc);
return size;
}