| /* |
| * include/types/quic_loss.h |
| * This file contains definitions for QUIC loss detection. |
| * |
| * Copyright 2019 HAProxy Technologies, Frederic Lecaille <flecaille@haproxy.com> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation, version 2.1 |
| * exclusively. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #ifndef _TYPES_QUIC_LOSS_H |
| #define _TYPES_QUIC_LOSS_H |
| #ifdef USE_QUIC |
| #ifndef USE_OPENSSL |
| #error "Must define USE_OPENSSL" |
| #endif |
| |
| #include <inttypes.h> |
| |
| /* Maximum reordering in packets. */ |
| #define QUIC_LOSS_PACKET_THRESHOLD 3 |
| #define QUIC_TIMER_GRANULARITY 1U /* 1ms */ |
| #define QUIC_LOSS_INITIAL_RTT 333U /* 333ms */ |
| |
| /* QUIC loss time threshold expressed an RTT multiplier |
| * (QUIC_LOSS_TIME_THRESHOLD_MULTIPLICAND / QUIC_LOSS_TIME_THRESHOLD_DIVISOR) |
| */ |
| #define QUIC_LOSS_TIME_THRESHOLD_MULTIPLICAND 9 |
| #define QUIC_LOSS_TIME_THRESHOLD_DIVISOR 8 |
| |
| /* Note that all the unit of variables for QUIC LOSS detections |
| * is the tick. |
| */ |
| |
| struct quic_loss { |
| /* The most recent RTT measurement. */ |
| unsigned int latest_rtt; |
| /* Smoothed RTT << 3 */ |
| unsigned int srtt; |
| /* RTT variation << 2 */ |
| unsigned int rtt_var; |
| /* Minimum RTT. */ |
| unsigned int rtt_min; |
| /* Number of NACKed sent PTO. */ |
| unsigned int pto_count; |
| }; |
| |
| #endif /* USE_QUIC */ |
| #endif /* _TYPES_QUIC_LOSS_H */ |