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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/netinet/cc/cc_newreno.h
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/*-

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 * Copyright (c) 2017 Tom Jones <[email protected]>

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 * All rights reserved.

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 *

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 * Redistribution and use in source and binary forms, with or without

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 * modification, are permitted provided that the following conditions

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 * are met:

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 * 1. Redistributions of source code must retain the above copyright

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 *    notice, this list of conditions and the following disclaimer.

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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 */

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#ifndef _CC_NEWRENO_H

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#define _CC_NEWRENO_H

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#define CCALGONAME_NEWRENO "newreno"

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struct newreno {

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	uint32_t beta;

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	uint32_t beta_ecn;

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	uint32_t newreno_flags;

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	uint32_t css_baseline_minrtt;

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	uint32_t css_current_round_minrtt;

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	uint32_t css_lastround_minrtt;

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	uint32_t css_rttsample_count;

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	uint32_t css_entered_at_round;

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	uint32_t css_current_round;

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	uint32_t css_fas_at_css_entry;

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	uint32_t css_lowrtt_fas;

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	uint32_t css_last_fas;

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};

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struct cc_newreno_opts {

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	int		name;

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	uint32_t	val;

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};

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#define CC_NEWRENO_BETA			1	/* Beta for normal DUP-ACK/Sack recovery */

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#define CC_NEWRENO_BETA_ECN		2	/* ECN Beta for Abe */

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/* Flags values */

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#define CC_NEWRENO_HYSTART_ENABLED	0x0002	/* We can do hystart, a loss removes this flag */

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#define CC_NEWRENO_HYSTART_IN_CSS	0x0004	/* If we enter hystart CSS this flag is set */

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#define CC_NEWRENO_BETA_ECN_ENABLED	0x0020

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#endif /* _CC_NEWRENO_H */

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