/*      $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);
}