altq_flowvalve.h

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    1 /*      $NetBSD: altq_flowvalve.h,v 1.2 2000/12/14 08:49:50 thorpej Exp $       */
    2 /*      $KAME: altq_flowvalve.h,v 1.4 2000/12/14 08:12:46 thorpej Exp $ */
    3 
    4 /*
    5  * Copyright (C) 1998-2000
    6  *      Sony Computer Science Laboratories Inc.  All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 
   30 #ifndef _ALTQ_ALTQ_FLOWVALVE_H_
   31 #define _ALTQ_ALTQ_FLOWVALVE_H_
   32 
   33 #ifdef _KERNEL
   34 
   35 /* fv_flow structure to define a unique address pair */
   36 struct fv_flow {
   37         int flow_af;            /* address family */
   38         union {
   39                 struct {
   40                         struct in_addr ip_src;
   41                         struct in_addr ip_dst;
   42                 } _ip;
   43 #ifdef INET6
   44                 struct {
   45                         struct in6_addr ip6_src;
   46                         struct in6_addr ip6_dst;
   47                 } _ip6;
   48 #endif
   49         } flow_un;
   50 };
   51 
   52 #define flow_ip         flow_un._ip
   53 #define flow_ip6        flow_un._ip6
   54 
   55 /* flowvalve entry */
   56 struct fve {
   57         TAILQ_ENTRY(fve) fve_lru;       /* for LRU list */
   58 
   59         enum fv_state { Green, Red } fve_state;
   60 
   61         int     fve_p;                  /* scaled average drop rate */
   62         int     fve_f;                  /* scaled average fraction */
   63         int     fve_count;              /* counter to update f */
   64         u_int   fve_ifseq;              /* ifseq at the last update of f */
   65         struct timeval  fve_lastdrop;   /* timestamp of the last drop */
   66 
   67         struct fv_flow fve_flow;        /* unique address pair */
   68 };
   69 
   70 /* flowvalve structure */
   71 struct flowvalve {
   72         u_int   fv_ifseq;       /* packet sequence number */
   73         int     fv_flows;       /* number of valid flows in the flowlist */
   74         int     fv_pthresh;     /* drop rate threshold */
   75 
   76         TAILQ_HEAD(fv_flowhead, fve) fv_flowlist;               /* LRU list */
   77 
   78         struct fve *fv_fves;    /* pointer to the allocated fves */
   79 
   80         int     *fv_p2ftab;     /* drop rate to fraction table */
   81 
   82         struct {
   83                 u_int   pass;           /* # of packets that have the fve
   84                                            but aren't predropped */
   85                 u_int   predrop;        /* # of packets predropped */
   86                 u_int   alloc;          /* # of fves assigned */
   87                 u_int   escape;         /* # of fves escaped */
   88         } fv_stats;
   89 };
   90 
   91 #endif /* _KERNEL */
   92 
   93 #endif /* _ALTQ_ALTQ_FLOWVALVE_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/altq/altq_flowvalve.h

FreeBSD/Linux Kernel Cross Reference
sys/altq/altq_flowvalve.h