Adding upstream version 3.3.4.upstream/3.3.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 132 insertions, 0 deletions

diff --git a/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_conn_stat.h b/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_conn_stat.h
new file mode 100644
index 0000000..1a93867
--- /dev/null
+++ b/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_conn_stat.h
@@ -0,0 +1,132 @@
+/*
+ * ngtcp2
+ *
+ * Copyright (c) 2023 ngtcp2 contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGTCP2_CONN_STAT_H
+#define NGTCP2_CONN_STAT_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <ngtcp2/ngtcp2.h>
+
+/**
+ * @struct
+ *
+ * :type:`ngtcp2_conn_stat` holds various connection statistics, and
+ * computed data for recovery and congestion controller.
+ */
+typedef struct ngtcp2_conn_stat {
+  /**
+   * :member:`latest_rtt` is the latest RTT sample which is not
+   * adjusted by acknowledgement delay.
+   */
+  ngtcp2_duration latest_rtt;
+  /**
+   * :member:`min_rtt` is the minimum RTT seen so far.  It is not
+   * adjusted by acknowledgement delay.
+   */
+  ngtcp2_duration min_rtt;
+  /**
+   * :member:`smoothed_rtt` is the smoothed RTT.
+   */
+  ngtcp2_duration smoothed_rtt;
+  /**
+   * :member:`rttvar` is a mean deviation of observed RTT.
+   */
+  ngtcp2_duration rttvar;
+  /**
+   * :member:`initial_rtt` is the initial RTT which is used when no
+   * RTT sample is available.
+   */
+  ngtcp2_duration initial_rtt;
+  /**
+   * :member:`first_rtt_sample_ts` is the timestamp when the first RTT
+   * sample is obtained.
+   */
+  ngtcp2_tstamp first_rtt_sample_ts;
+  /**
+   * :member:`pto_count` is the count of successive PTO timer
+   * expiration.
+   */
+  size_t pto_count;
+  /**
+   * :member:`loss_detection_timer` is the deadline of the current
+   * loss detection timer.
+   */
+  ngtcp2_tstamp loss_detection_timer;
+  /**
+   * :member:`last_tx_pkt_ts` corresponds to
+   * time_of_last_ack_eliciting_packet in :rfc:`9002`.
+   */
+  ngtcp2_tstamp last_tx_pkt_ts[NGTCP2_PKTNS_ID_MAX];
+  /**
+   * :member:`loss_time` corresponds to loss_time in :rfc:`9002`.
+   */
+  ngtcp2_tstamp loss_time[NGTCP2_PKTNS_ID_MAX];
+  /**
+   * :member:`cwnd` is the size of congestion window.
+   */
+  uint64_t cwnd;
+  /**
+   * :member:`ssthresh` is slow start threshold.
+   */
+  uint64_t ssthresh;
+  /**
+   * :member:`congestion_recovery_start_ts` is the timestamp when
+   * congestion recovery started.
+   */
+  ngtcp2_tstamp congestion_recovery_start_ts;
+  /**
+   * :member:`bytes_in_flight` is the number in bytes of all sent
+   * packets which have not been acknowledged.
+   */
+  uint64_t bytes_in_flight;
+  /**
+   * :member:`max_tx_udp_payload_size` is the maximum size of UDP
+   * datagram payload that this endpoint transmits.  It is used by
+   * congestion controller to compute congestion window.
+   */
+  size_t max_tx_udp_payload_size;
+  /**
+   * :member:`delivery_rate_sec` is the current sending rate measured
+   * in byte per second.
+   */
+  uint64_t delivery_rate_sec;
+  /**
+   * :member:`pacing_interval` is the inverse of pacing rate, which is
+   * the current packet sending rate computed by a congestion
+   * controller.  0 if a congestion controller does not set pacing
+   * interval.  Even if this value is set to 0, the library paces
+   * packets.
+   */
+  ngtcp2_duration pacing_interval;
+  /**
+   * :member:`send_quantum` is the maximum size of a data aggregate
+   * scheduled and transmitted together.
+   */
+  size_t send_quantum;
+} ngtcp2_conn_stat;
+
+#endif /* NGTCP2_CONN_STAT_H */