/*      $NetBSD: qdisc_cbq.c,v 1.11 2021/07/21 06:48:28 ozaki-r Exp $   */
/*      $KAME: qdisc_cbq.c,v 1.7 2003/09/17 14:27:37 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_cbq.h>

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

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

#define NCLASSES        64

#ifndef RM_FILTER_GAIN
#define RM_FILTER_GAIN  5       /* log2 of gain, e.g., 5 => 31/32 */
#endif
#ifndef RM_POWER
#define RM_POWER        (1 << RM_FILTER_GAIN)
#endif

void
cbq_stat_loop(int fd, const char *ifname, int count, int interval)
{
        class_stats_t stats1[NCLASSES], stats2[NCLASSES];
        char clnames[NCLASSES][128];
        u_long clhandles[NCLASSES];
        struct cbq_getstats     get_stats;
        class_stats_t           *sp, *lp, *new, *last, *tmp;
        struct timeval          cur_time, last_time;
        int                     i;
        double                  flow_bps, sec;
        int                     cnt = count;
        sigset_t                omask;

        strlcpy(get_stats.iface.cbq_ifacename, ifname,
                sizeof(get_stats.iface.cbq_ifacename));
        new = &stats1[0];
        last = &stats2[0];

        for (i = 0; i < NCLASSES; i++)
            clhandles[i] = NULL_CLASS_HANDLE;

        for (;;) {
                get_stats.nclasses = NCLASSES;
                get_stats.stats = new;
                if (ioctl(fd, CBQ_GETSTATS, &get_stats) < 0)
                        err(1, "ioctl CBQ_GETSTATS");

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

                for (i=0; i<get_stats.nclasses; i++) {
                        sp = &new[i];
                        lp = &last[i];

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

                        printf("Class %d on Interface %s: %s\n",
                            sp->handle, ifname, clnames[i]);

                        flow_bps = 8.0 / (double)sp->ps_per_byte
                            * 1000*1000*1000*1000;

                        printf("\tpriority: %d depth: %d",
                               sp->priority, sp->depth);
                        printf(" offtime: %"PRIi64" [ns] wrr_allot: %d bytes\n",
                               sp->offtime, sp->wrr_allot);
                        printf("\tpsPerByte: %"PRIu64, sp->ps_per_byte);
                        printf("\t(%sbps)", rate2str(flow_bps));
                        if (lp->handle != NULL_CLASS_HANDLE) {
                                printf(",\tMeasured: %s [bps]\n",
                                       rate2str(calc_rate(sp->xmit_cnt.bytes,
                                                lp->xmit_cnt.bytes, sec)));
                        } else {
                                printf("\n");
                        }
                        printf("\tpkts: %llu,\tbytes: %llu\n",
                               (ull)sp->xmit_cnt.packets,
                               (ull)sp->xmit_cnt.bytes);
                        printf("\tovers: %u,\toveractions: %u\n",
                               sp->over, sp->overactions);
                        printf("\tborrows: %u,\tdelays: %u\n",
                               sp->borrows, sp->delays);
                        printf("\tdrops: %llu,\tdrop_bytes: %llu\n",
                               (ull)sp->drop_cnt.packets,
                               (ull)sp->drop_cnt.bytes);
                        if (sp->qtype == Q_RED)
                                print_redstats(sp->red);
                        else if (sp->qtype == Q_RIO)
                                print_riostats(sp->red);

                        printf("\tQCount: %d,\t(qmax: %d)\n",
                               sp->qcnt, sp->qmax);
#if 0
                        printf("\tAvgIdle: %d [us],\t(maxidle: %d minidle: %d [us])\n",
                               sp->avgidle >> RM_FILTER_GAIN,
                               sp->maxidle >> RM_FILTER_GAIN,
                               sp->minidle / RM_POWER);
#else
                        printf("\tAvgIdle: %"PRIi64" [ns],\t(maxidle: %"PRIi64" minidle: %"PRIi64" [ns])\n",
                               sp->avgidle, sp->maxidle, sp->minidle);
#endif
                }

                /* 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);
        }
}