1/*-
 2 * Copyright (c) 2017 Tom Jones <tj@enoti.me>
 3 * All rights reserved.
 4 *
 5 * Redistribution and use in source and binary forms, with or without
 6 * modification, are permitted provided that the following conditions
 7 * are met:
 8 * 1. Redistributions of source code must retain the above copyright
 9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#ifndef _CC_NEWRENO_H
28#define _CC_NEWRENO_H
29
30#define CCALGONAME_NEWRENO "newreno"
31
32struct newreno {
33	uint32_t beta;
34	uint32_t beta_ecn;
35	uint32_t newreno_flags;
36	uint32_t css_baseline_minrtt;
37	uint32_t css_current_round_minrtt;
38	uint32_t css_lastround_minrtt;
39	uint32_t css_rttsample_count;
40	uint32_t css_entered_at_round;
41	uint32_t css_current_round;
42	uint32_t css_fas_at_css_entry;
43	uint32_t css_lowrtt_fas;
44	uint32_t css_last_fas;
45};
46
47struct cc_newreno_opts {
48	int		name;
49	uint32_t	val;
50};
51
52#define CC_NEWRENO_BETA			1	/* Beta for normal DUP-ACK/Sack recovery */
53#define CC_NEWRENO_BETA_ECN		2	/* ECN Beta for Abe */
54
55/* Flags values */
56#define CC_NEWRENO_HYSTART_ENABLED	0x0002	/* We can do hystart, a loss removes this flag */
57#define CC_NEWRENO_HYSTART_IN_CSS	0x0004	/* If we enter hystart CSS this flag is set */
58#define CC_NEWRENO_BETA_ECN_ENABLED	0x0020
59#endif /* _CC_NEWRENO_H */