From: Frédéric Lécaille <flecaille@haproxy.com>
Date: Thu, 10 Mar 2022 14:05:32 +0000 (+0100)
Subject: MINOR: quic: Add a function to compute the current PTO
X-Git-Tag: v2.6-dev3~12
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=c7a69e2aa55672031d5e3751a5ff06266076f312;p=thirdparty%2Fhaproxy.git

MINOR: quic: Add a function to compute the current PTO

There was not such a function at this time. This is needed to implement the idle
timeout feature.
---

diff --git a/include/haproxy/quic_loss.h b/include/haproxy/quic_loss.h
index 6e4aebb930..1c0bfc7a75 100644
--- a/include/haproxy/quic_loss.h
+++ b/include/haproxy/quic_loss.h
@@ -119,6 +119,15 @@ static inline struct quic_pktns *quic_loss_pktns(struct quic_conn *qc)
 	return pktns;
 }
 
+/* Return the PTO associated to <pktns> packet number space for <qc> connection */
+static inline unsigned int quic_pto(struct quic_conn *qc)
+{
+	struct quic_loss *ql = &qc->path->loss;
+
+	return (ql->srtt >> 3) + QUIC_MAX(ql->rtt_var, QUIC_TIMER_GRANULARITY) +
+		HA_ATOMIC_LOAD(&qc->state) >= QUIC_HS_ST_COMPLETE ? qc->max_ack_delay : 0;
+}
+
 /* Returns for <qc> QUIC connection the first packet number space to
  * arm the PTO for if any or a packet number space with TICK_ETERNITY
  * as PTO value if not.