/*-
* Copyright (C) 1998-2003
* 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.
*
* $KAME: altq_rio.h,v 1.9 2003/07/10 12:07:49 kjc Exp $
*/
#ifndef _ALTQ_ALTQ_RIO_H_
#define _ALTQ_ALTQ_RIO_H_
#include <net/altq/altq_classq.h>
/*
* RIO: RED with IN/OUT bit
* (extended to support more than 2 drop precedence values)
*/
#define RIO_NDROPPREC 3 /* number of drop precedence values */
/* rio flags */
#define RIOF_ECN4 0x01 /* use packet marking for IPv4 packets */
#define RIOF_ECN6 0x02 /* use packet marking for IPv6 packets */
#define RIOF_ECN (RIOF_ECN4 | RIOF_ECN6)
#define RIOF_CLEARDSCP 0x200 /* clear diffserv codepoint */
#ifdef _KERNEL
typedef struct rio {
/* per drop precedence structure */
struct dropprec_state {
/* red parameters */
int inv_pmax; /* inverse of max drop probability */
int th_min; /* red min threshold */
int th_max; /* red max threshold */
/* variables for internal use */
int th_min_s; /* th_min scaled by avgshift */
int th_max_s; /* th_max scaled by avgshift */
int probd; /* drop probability denominator */
int qlen; /* queue length */
int avg; /* (scaled) queue length average */
int count; /* packet count since the last dropped/
marked packet */
int idle; /* queue was empty */
int old; /* avg is above th_min */
struct timeval last; /* timestamp when queue becomes idle */
} rio_precstate[RIO_NDROPPREC];
int rio_wshift; /* log(red_weight) */
int rio_weight; /* weight for EWMA */
struct wtab *rio_wtab; /* weight table */
int rio_pkttime; /* average packet time in micro sec
used for idle calibration */
int rio_flags; /* rio flags */
u_int8_t rio_codepoint; /* codepoint value to tag packets */
u_int8_t rio_codepointmask; /* codepoint mask bits */
struct redstats q_stats[RIO_NDROPPREC]; /* statistics */
} rio_t;
extern rio_t *rio_alloc(int, struct redparams *, int, int);
extern void rio_destroy(rio_t *);
extern void rio_getstats(rio_t *, struct redstats *);
extern int rio_addq(rio_t *, class_queue_t *, struct mbuf *,
struct altq_pktattr *);
extern struct mbuf *rio_getq(rio_t *, class_queue_t *);
#endif /* _KERNEL */
#endif /* _ALTQ_ALTQ_RIO_H_ */
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