/*      $NetBSD: qdisc_conf.c,v 1.6 2011/01/04 09:13:22 wiz Exp $       */
/*      $KAME: qdisc_conf.c,v 1.5 2002/10/26 06:59:54 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/socket.h>
#if defined(__NetBSD__) || defined(__OpenBSD__)
#include <sys/ioctl.h>
#endif
#include <sys/fcntl.h>
#include <net/if.h>
#include <netinet/in.h>
#include <altq/altq.h>

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

#include "altqstat.h"

#define ALTQ_DEVICE     "/dev/altq/altq"

struct qdisc_conf qdisc_table[] = {
        {"cbq",         ALTQT_CBQ,      cbq_stat_loop},
        {"hfsc",        ALTQT_HFSC,     hfsc_stat_loop},
        {"cdnr",        ALTQT_CDNR,     cdnr_stat_loop},
        {"wfq",         ALTQT_WFQ,      wfq_stat_loop},
        {"fifoq",       ALTQT_FIFOQ,    fifoq_stat_loop},
        {"red",         ALTQT_RED,      red_stat_loop},
        {"rio",         ALTQT_RIO,      rio_stat_loop},
        {"blue",        ALTQT_BLUE,     blue_stat_loop},
        {"priq",        ALTQT_PRIQ,     priq_stat_loop},
        {"jobs",        ALTQT_JOBS,     jobs_stat_loop},
        {NULL,          0,              NULL}
};

stat_loop_t *
qdisc2stat_loop(const char *qdisc_name)
{
        struct qdisc_conf *st;

        for (st = qdisc_table; st->qdisc_name != NULL; st++)
                if (strcmp(st->qdisc_name, qdisc_name) == 0)
                        return (st->stat_loop);
        return (NULL);
}

int
ifname2qdisc(const char *ifname, char *qname)
{
        struct altqreq qtypereq;
        int fd, qtype = 0;

        if (ifname[0] == '_') {
                /* input interface */
                if (qname != NULL)
                        strlcpy(qname, "cdnr", 64);
                return (ALTQT_CDNR);
        }

        strlcpy(qtypereq.ifname, ifname, sizeof(qtypereq.ifname));
        if ((fd = open(ALTQ_DEVICE, O_RDONLY)) < 0) {
                warn("can't open %s", ALTQ_DEVICE);
                return (0);
        }
        if (ioctl(fd, ALTQGTYPE, &qtypereq) < 0) {
                warn("ALTQGQTYPE");
                close(fd);
                return (0);
        }
        close(fd);

        if (qname != NULL) {
                struct qdisc_conf *st;

                qtype = qtypereq.arg;
                for (st = qdisc_table; st->qdisc_name != NULL; st++)
                        if (st->altqtype == qtype)
                                strlcpy(qname, st->qdisc_name, 64);
        }
                
        return (qtype);
}