/*      $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;
}