/*      $NetBSD: qdisc_red.c,v 1.5 2006/10/28 11:43:02 peter Exp $      */
/*      $KAME: qdisc_red.c,v 1.5 2002/11/08 06:36:18 kjc Exp $  */
/*
 * Copyright (C) 1999-2000
 *      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.
 */

#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <altq/altq.h>
#include <altq/altq_red.h>

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <errno.h>
#include <err.h>

#include "altqstat.h"

static int avg_scale = 4096;    /* default fixed-point scale */

void
red_stat_loop(int fd, const char *ifname, int count, int interval)
{
        struct red_stats red_stats;
        struct timeval cur_time, last_time;
        u_int64_t last_bytes;
        double sec;
        int cnt = count;
        sigset_t                omask;
        
        strlcpy(red_stats.iface.red_ifname, ifname,
                sizeof(red_stats.iface.red_ifname));

        gettimeofday(&last_time, NULL);
        last_time.tv_sec -= interval;
        last_bytes = 0;

        for (;;) {      
                if (ioctl(fd, RED_GETSTATS, &red_stats) < 0)
                        err(1, "ioctl RED_GETSTATS");

                gettimeofday(&cur_time, NULL);
                sec = calc_interval(&cur_time, &last_time);

                printf(" weight:%d inv_pmax:%d qthresh:(%d,%d)\n",
                       red_stats.weight,  red_stats.inv_pmax,
                       red_stats.th_min,  red_stats.th_max);
                printf(" q_len:%d (avg: %.2f), q_limit:%d\n",
                       red_stats.q_len,
                       ((double)red_stats.q_avg)/(double)avg_scale,
                       red_stats.q_limit);
                printf(" xmit:%llu pkts, drop:%llu pkts (forced: %u, early: %u)\n",
                       (ull)red_stats.xmit_cnt.packets,
                       (ull)red_stats.drop_cnt.packets,
                       red_stats.drop_forced, red_stats.drop_unforced);
                if (red_stats.marked_packets != 0)
                        printf(" marked: %u\n", red_stats.marked_packets);
                printf(" throughput: %sbps\n",
                       rate2str(calc_rate(red_stats.xmit_cnt.bytes,
                                          last_bytes, sec)));
                if (red_stats.fv_alloc > 0) {
                        printf(" flowvalve: alloc:%u flows:%u\n",
                               red_stats.fv_alloc, red_stats.fv_flows);
                        printf("  predrop:%u pass:%u escape:%u\n",
                               red_stats.fv_predrop, red_stats.fv_pass,
                               red_stats.fv_escape);
                }
                printf("\n");

                last_bytes = red_stats.xmit_cnt.bytes;
                last_time = cur_time;

                if (count != 0 && --cnt == 0)
                        break;

                /* wait for alarm signal */
                if (sigprocmask(SIG_BLOCK, NULL, &omask) == 0)
                        sigsuspend(&omask);
        }
}

int
print_redstats(struct redstats *rp)
{
        printf("     RED q_avg:%.2f xmit:%llu (forced:%u early:%u marked:%u)\n",
               ((double)rp->q_avg)/(double)avg_scale,
               (ull)rp->xmit_cnt.packets, 
               rp->drop_forced,
               rp->drop_unforced,
               rp->marked_packets);
        return 0;
}