/*      $NetBSD: qdisc_wfq.c,v 1.5 2006/10/28 11:43:02 peter Exp $      */
/*      $KAME: qdisc_wfq.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_wfq.h>

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <errno.h>
#include <err.h>
#ifndef NO_CURSES
#include <curses.h>
#endif

#include "altqstat.h"

struct wfqinfo {
       int qid;
       queue_stats stats;
       u_quad_t last_bytes;
       double bps;
};

#define NTOP            10
static int ntop = NTOP;

void
wfq_stat_loop(int fd, const char *ifname, int count, int interval)
{
       struct wfq_getstats wfq_stats;
       struct timeval cur_time, last_time;
       int i, j, k, nqueues;
       double sec;
       struct wfqinfo *qinfo, **top;
       int cnt = count;
       sigset_t                omask;

       strlcpy(wfq_stats.iface.wfq_ifacename, ifname,
               sizeof(wfq_stats.iface.wfq_ifacename));

       /*
        * first, find out how many queues are available
        */
       for (i = 0; i < MAX_QSIZE; i++) {
               wfq_stats.qid = i;
               if (ioctl(fd, WFQ_GET_STATS, &wfq_stats) < 0)
                       break;
       }
       nqueues = i;
       printf("wfq on %s: %d queues are used\n", ifname, nqueues);

       if ((qinfo = malloc(nqueues * sizeof(struct wfqinfo))) == NULL)
               err(1, "malloc failed!");
       if ((top = malloc(ntop * sizeof(struct wfqinfo *))) == NULL)
               err(1, "malloc failed!");

#ifndef NO_CURSES
       sleep(2);  /* wait a bit before clearing the screen */

       initscr();
#endif

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

       for (;;) {
               for (j = 0; j < ntop; j++)
                       top[j] = NULL;

               for (i = 0; i < nqueues; i++) {
                       wfq_stats.qid = i;
                       if (ioctl(fd, WFQ_GET_STATS, &wfq_stats) < 0)
                               err(1, "ioctl WFQ_GET_STATS");

                       qinfo[i].qid = i;
                       qinfo[i].stats = wfq_stats.stats;
               }

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

               /*
                * calculate the throughput of each queue
                */
               for (i = 0; i < nqueues; i++) {
                       qinfo[i].bps = calc_rate(qinfo[i].stats.xmit_cnt.bytes,
                                                qinfo[i].last_bytes, sec);
                       qinfo[i].last_bytes = qinfo[i].stats.xmit_cnt.bytes;

                       for (j = 0; j < ntop; j++) {
                               if (top[j] == NULL) {
                                       top[j] = &qinfo[i];
                                       break;
                               }
                               if (top[j]->bps < qinfo[i].bps ||
                                   (top[j]->bps == qinfo[i].bps &&
                                    top[j]->stats.xmit_cnt.packets <
                                    qinfo[i].stats.xmit_cnt.packets)) {
                                       for (k = ntop-1; k > j; k--)
                                               top[k] = top[k-1];
                                       top[j] = &qinfo[i];
                                       break;
                               }
                       }
               }

               /*
                * display top
                */
               printf("[QID] WEIGHT QSIZE(KB) SENT(pkts)     (KB)       DROP(pkts)     (KB)     bps\n\r");

               for (j = 0; j < ntop; j++) {
                       if (top[j] != NULL)
                               printf("[%4d] %4d %4d %10llu %14llu %10llu %14llu %9s\n\r",
                                      top[j]->qid,
                                      top[j]->stats.weight,
                                      top[j]->stats.bytes / 1024,
                                      (ull)top[j]->stats.xmit_cnt.packets,
                                      (ull)top[j]->stats.xmit_cnt.bytes /1024,
                                      (ull)top[j]->stats.drop_cnt.packets,
                                      (ull)top[j]->stats.drop_cnt.bytes /1024,
                                      rate2str(top[j]->bps));
                       else
                               printf("\n");
               }
#ifndef NO_CURSES
               refresh();
               mvcur(ntop+1, 0, 0, 0);
#endif

               last_time = cur_time;

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

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

}

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