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altq_flowvalve.h
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altq_flowvalve.h
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/* $NetBSD: altq_flowvalve.h,v 1.3 2006/10/12 19:59:08 peter Exp $ */
/* $KAME: altq_flowvalve.h,v 1.5 2002/04/03 05:38:50 kjc Exp $ */
/*
* Copyright (C) 1998-2002
* Sony Computer Science Laboratories Inc. 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 SONY CSL 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 SONY CSL 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.
*/
#ifndef _ALTQ_ALTQ_FLOWVALVE_H_
#define _ALTQ_ALTQ_FLOWVALVE_H_
#ifdef _KERNEL
/* fv_flow structure to define a unique address pair */
struct fv_flow {
int flow_af; /* address family */
union {
struct {
struct in_addr ip_src;
struct in_addr ip_dst;
} _ip;
#ifdef INET6
struct {
struct in6_addr ip6_src;
struct in6_addr ip6_dst;
} _ip6;
#endif
} flow_un;
};
#define flow_ip flow_un._ip
#define flow_ip6 flow_un._ip6
/* flowvalve entry */
struct fve {
TAILQ_ENTRY(fve) fve_lru; /* for LRU list */
enum fv_state { Green, Red } fve_state;
int fve_p; /* scaled average drop rate */
int fve_f; /* scaled average fraction */
int fve_count; /* counter to update f */
u_int fve_ifseq; /* ifseq at the last update of f */
struct timeval fve_lastdrop; /* timestamp of the last drop */
struct fv_flow fve_flow; /* unique address pair */
};
/* flowvalve structure */
struct flowvalve {
u_int fv_ifseq; /* packet sequence number */
int fv_flows; /* number of valid flows in the flowlist */
int fv_pthresh; /* drop rate threshold */
TAILQ_HEAD(fv_flowhead, fve) fv_flowlist; /* LRU list */
struct fve *fv_fves; /* pointer to the allocated fves */
int *fv_p2ftab; /* drop rate to fraction table */
struct {
u_int pass; /* # of packets that have the fve
but aren't predropped */
u_int predrop; /* # of packets predropped */
u_int alloc; /* # of fves assigned */
u_int escape; /* # of fves escaped */
} fv_stats;
};
#endif /* _KERNEL */
#endif /* _ALTQ_ALTQ_FLOWVALVE_H_ */