/*      $NetBSD: qdisc_priq.c,v 1.6 2006/10/28 11:43:02 peter Exp $     */
/*      $KAME: qdisc_priq.c,v 1.6 2003/07/10 12:09:38 kjc Exp $ */
/*
 * Copyright (C) 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_priq.h>

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

#include "quip_client.h"
#include "altqstat.h"

void
priq_stat_loop(int fd, const char *ifname, int count, int interval)
{
        struct priq_classstats stats1[PRIQ_MAXPRI], stats2[PRIQ_MAXPRI];
        char clnames[PRIQ_MAXPRI][128];
        struct priq_class_stats get_stats;
        struct priq_classstats  *sp, *lp, *new, *last, *tmp;
        struct timeval          cur_time, last_time;
        int                     i;
        double                  sec;
        int                     cnt = count;
        sigset_t                omask;
        
        strlcpy(get_stats.iface.ifname, ifname,
                sizeof(get_stats.iface.ifname));
        new = &stats1[0];
        last = &stats2[0];

        /* invalidate class handles */
        for (i=0; i<PRIQ_MAXPRI; i++)
                last[i].class_handle = PRIQ_NULLCLASS_HANDLE;

        for (;;) {
                get_stats.stats = new;
                get_stats.maxpri = PRIQ_MAXPRI;
                if (ioctl(fd, PRIQ_GETSTATS, &get_stats) < 0)
                        err(1, "ioctl PRIQ_GETSTATS");

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

                printf("\n%s:\n", ifname);

                for (i = get_stats.maxpri; i >= 0; i--) {
                        sp = &new[i];
                        lp = &last[i];

                        if (sp->class_handle == PRIQ_NULLCLASS_HANDLE)
                                continue;

                        if (sp->class_handle != lp->class_handle) {
                                quip_chandle2name(ifname, sp->class_handle,
                                    clnames[i], sizeof(clnames[0]));
                        }

                        printf("[%s] handle:%#x pri:%d\n",
                               clnames[i], sp->class_handle, i);
                        if (lp->class_handle != PRIQ_NULLCLASS_HANDLE) {
                                printf("  measured: %sbps qlen:%2d period:%u\n",
                                    rate2str(calc_rate(sp->xmitcnt.bytes,
                                        lp->xmitcnt.bytes, sec)),
                                    sp->qlength, sp->period);
                        }
                        printf("     packets:%llu (%llu bytes) drops:%llu\n",
                               (ull)sp->xmitcnt.packets,
                               (ull)sp->xmitcnt.bytes,
                               (ull)sp->dropcnt.packets);
                        if (sp->qtype == Q_RED)
                                print_redstats(sp->red);
                        else if (sp->qtype == Q_RIO)
                                print_riostats(sp->red);
                }

                /* swap the buffer pointers */
                tmp = last;
                last = new;
                new = tmp;

                last_time = cur_time;

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

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