2 * Copyright (c) 2017 Tom Jones <tj@enoti.me>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
32 #define CCALGONAME_NEWRENO "newreno"
37 uint32_t newreno_flags;
38 uint32_t css_baseline_minrtt;
39 uint32_t css_current_round_minrtt;
40 uint32_t css_lastround_minrtt;
41 uint32_t css_rttsample_count;
42 uint32_t css_entered_at_round;
43 uint32_t css_current_round;
44 uint32_t css_fas_at_css_entry;
45 uint32_t css_lowrtt_fas;
46 uint32_t css_last_fas;
49 struct cc_newreno_opts {
54 #define CC_NEWRENO_BETA 1 /* Beta for normal DUP-ACK/Sack recovery */
55 #define CC_NEWRENO_BETA_ECN 2 /* ECN Beta for Abe */
56 #define CC_NEWRENO_ENABLE_HYSTART 3 /* Enable hystart */
59 #define CC_NEWRENO_HYSTART_ALLOWED 0x0001 /* Does the tcp connection allow hystart? */
60 #define CC_NEWRENO_HYSTART_ENABLED 0x0002 /* We can do hystart, a loss removes this flag */
61 #define CC_NEWRENO_HYSTART_IN_CSS 0x0004 /* If we enter hystart CSS this flag is set */
62 #define CC_NEWRENO_HYSTART_CAN_SH_CWND 0x0008 /* Can hystart when going CSS -> CA slam the cwnd */
63 #define CC_NEWRENO_HYSTART_CONS_SSTH 0x0010 /* Should hystart use the more conservative sstrhesh */
64 #define CC_NEWRENO_BETA_ECN_ENABLED 0x0020
65 #endif /* _CC_NEWRENO_H */