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 * $FreeBSD$ 27 */ 28 29 #ifndef _CC_NEWRENO_H 30 #define _CC_NEWRENO_H 31 32 #define CCALGONAME_NEWRENO "newreno" 33 34 struct newreno { 35 uint32_t beta; 36 uint32_t beta_ecn; 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; 47 }; 48 49 struct cc_newreno_opts { 50 int name; 51 uint32_t val; 52 }; 53 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 */ 57 58 /* Flags values */ 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 */ 66