FreeBSD/Linux Kernel Cross Reference
sys/netinet/cc/cc_newreno.h

     /*-
      * Copyright (c) 2017 Tom Jones <tj@enoti.me>
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #ifndef _CC_NEWRENO_H
    #define _CC_NEWRENO_H
    
    #define CCALGONAME_NEWRENO "newreno"
    
    struct newreno {
            uint32_t beta;
            uint32_t beta_ecn;
            uint32_t newreno_flags;
            uint32_t css_baseline_minrtt;
            uint32_t css_current_round_minrtt;
            uint32_t css_lastround_minrtt;
            uint32_t css_rttsample_count;
            uint32_t css_entered_at_round;
            uint32_t css_current_round;
            uint32_t css_fas_at_css_entry;
            uint32_t css_lowrtt_fas;
            uint32_t css_last_fas;
    };
    
    struct cc_newreno_opts {
            int             name;
            uint32_t        val;
    };
    
    #define CC_NEWRENO_BETA                 1       /* Beta for normal DUP-ACK/Sack recovery */
    #define CC_NEWRENO_BETA_ECN             2       /* ECN Beta for Abe */
    
    /* Flags values */
    #define CC_NEWRENO_HYSTART_ENABLED      0x0002  /* We can do hystart, a loss removes this flag */
    #define CC_NEWRENO_HYSTART_IN_CSS       0x0004  /* If we enter hystart CSS this flag is set */
    #define CC_NEWRENO_BETA_ECN_ENABLED     0x0020
    #endif /* _CC_NEWRENO_H */

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