94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
/* $NetBSD: altq_flowvalve.h,v 1.2 2000/12/14 08:49:50 thorpej Exp $ */
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/* $KAME: altq_flowvalve.h,v 1.4 2000/12/14 08:12:46 thorpej Exp $ */
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/*
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* Copyright (C) 1998-2000
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* Sony Computer Science Laboratories Inc. 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 SONY CSL 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 SONY CSL 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 _ALTQ_ALTQ_FLOWVALVE_H_
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#define _ALTQ_ALTQ_FLOWVALVE_H_
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#ifdef _KERNEL
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/* fv_flow structure to define a unique address pair */
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struct fv_flow {
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int flow_af; /* address family */
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union {
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struct {
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struct in_addr ip_src;
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struct in_addr ip_dst;
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} _ip;
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#ifdef INET6
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struct {
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struct in6_addr ip6_src;
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struct in6_addr ip6_dst;
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} _ip6;
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#endif
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} flow_un;
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};
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#define flow_ip flow_un._ip
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#define flow_ip6 flow_un._ip6
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/* flowvalve entry */
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struct fve {
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TAILQ_ENTRY(fve) fve_lru; /* for LRU list */
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enum fv_state { Green, Red } fve_state;
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int fve_p; /* scaled average drop rate */
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int fve_f; /* scaled average fraction */
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int fve_count; /* counter to update f */
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u_int fve_ifseq; /* ifseq at the last update of f */
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struct timeval fve_lastdrop; /* timestamp of the last drop */
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struct fv_flow fve_flow; /* unique address pair */
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};
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/* flowvalve structure */
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struct flowvalve {
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u_int fv_ifseq; /* packet sequence number */
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int fv_flows; /* number of valid flows in the flowlist */
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int fv_pthresh; /* drop rate threshold */
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TAILQ_HEAD(fv_flowhead, fve) fv_flowlist; /* LRU list */
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struct fve *fv_fves; /* pointer to the allocated fves */
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int *fv_p2ftab; /* drop rate to fraction table */
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struct {
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u_int pass; /* # of packets that have the fve
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but aren't predropped */
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u_int predrop; /* # of packets predropped */
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u_int alloc; /* # of fves assigned */
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u_int escape; /* # of fves escaped */
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} fv_stats;
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};
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#endif /* _KERNEL */
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#endif /* _ALTQ_ALTQ_FLOWVALVE_H_ */
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