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/*
* ngtcp2
*
* Copyright (c) 2018 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_CC_H
#define NGTCP2_CC_H
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <ngtcp2/ngtcp2.h>
#define NGTCP2_LOSS_REDUCTION_FACTOR_BITS 1
#define NGTCP2_PERSISTENT_CONGESTION_THRESHOLD 3
struct ngtcp2_log;
typedef struct ngtcp2_log ngtcp2_log;
/*
* ngtcp2_cc_compute_initcwnd computes initial cwnd.
*/
uint64_t ngtcp2_cc_compute_initcwnd(size_t max_packet_size);
ngtcp2_cc_pkt *ngtcp2_cc_pkt_init(ngtcp2_cc_pkt *pkt, int64_t pkt_num,
size_t pktlen, ngtcp2_pktns_id pktns_id,
ngtcp2_tstamp ts_sent);
/* ngtcp2_reno_cc is the RENO congestion controller. */
struct ngtcp2_reno_cc {
ngtcp2_cc_base ccb;
uint64_t max_delivery_rate_sec;
uint64_t target_cwnd;
};
typedef struct ngtcp2_reno_cc ngtcp2_reno_cc;
int ngtcp2_cc_reno_cc_init(ngtcp2_cc *cc, ngtcp2_log *log,
const ngtcp2_mem *mem);
void ngtcp2_cc_reno_cc_free(ngtcp2_cc *cc, const ngtcp2_mem *mem);
void ngtcp2_reno_cc_init(ngtcp2_reno_cc *cc, ngtcp2_log *log);
void ngtcp2_reno_cc_free(ngtcp2_reno_cc *cc);
void ngtcp2_cc_reno_cc_on_pkt_acked(ngtcp2_cc *cc, ngtcp2_conn_stat *cstat,
const ngtcp2_cc_pkt *pkt, ngtcp2_tstamp ts);
void ngtcp2_cc_reno_cc_congestion_event(ngtcp2_cc *cc, ngtcp2_conn_stat *cstat,
ngtcp2_tstamp ts_sent,
ngtcp2_tstamp ts);
void ngtcp2_cc_reno_cc_on_persistent_congestion(ngtcp2_cc *cc,
ngtcp2_conn_stat *cstat,
ngtcp2_tstamp ts);
void ngtcp2_cc_reno_cc_on_ack_recv(ngtcp2_cc *cc, ngtcp2_conn_stat *cstat,
ngtcp2_tstamp ts);
void ngtcp2_cc_reno_cc_reset(ngtcp2_cc *cc);
/* ngtcp2_cubic_cc is CUBIC congestion controller. */
typedef struct ngtcp2_cubic_cc {
ngtcp2_cc_base ccb;
uint64_t max_delivery_rate_sec;
uint64_t target_cwnd;
uint64_t w_last_max;
uint64_t w_tcp;
uint64_t origin_point;
ngtcp2_tstamp epoch_start;
uint64_t k;
/* HyStart++ variables */
size_t rtt_sample_count;
uint64_t current_round_min_rtt;
uint64_t last_round_min_rtt;
int64_t window_end;
} ngtcp2_cubic_cc;
int ngtcp2_cc_cubic_cc_init(ngtcp2_cc *cc, ngtcp2_log *log,
const ngtcp2_mem *mem);
void ngtcp2_cc_cubic_cc_free(ngtcp2_cc *cc, const ngtcp2_mem *mem);
void ngtcp2_cubic_cc_init(ngtcp2_cubic_cc *cc, ngtcp2_log *log);
void ngtcp2_cubic_cc_free(ngtcp2_cubic_cc *cc);
void ngtcp2_cc_cubic_cc_on_pkt_acked(ngtcp2_cc *cc, ngtcp2_conn_stat *cstat,
const ngtcp2_cc_pkt *pkt,
ngtcp2_tstamp ts);
void ngtcp2_cc_cubic_cc_congestion_event(ngtcp2_cc *cc, ngtcp2_conn_stat *cstat,
ngtcp2_tstamp ts_sent,
ngtcp2_tstamp ts);
void ngtcp2_cc_cubic_cc_on_persistent_congestion(ngtcp2_cc *cc,
ngtcp2_conn_stat *cstat,
ngtcp2_tstamp ts);
void ngtcp2_cc_cubic_cc_on_ack_recv(ngtcp2_cc *cc, ngtcp2_conn_stat *cstat,
ngtcp2_tstamp ts);
void ngtcp2_cc_cubic_cc_on_pkt_sent(ngtcp2_cc *cc, ngtcp2_conn_stat *cstat,
const ngtcp2_cc_pkt *pkt);
void ngtcp2_cc_cubic_cc_new_rtt_sample(ngtcp2_cc *cc, ngtcp2_conn_stat *cstat,
ngtcp2_tstamp ts);
void ngtcp2_cc_cubic_cc_reset(ngtcp2_cc *cc);
void ngtcp2_cc_cubic_cc_event(ngtcp2_cc *cc, ngtcp2_conn_stat *cstat,
ngtcp2_cc_event_type event, ngtcp2_tstamp ts);
#endif /* NGTCP2_CC_H */
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