/*
 * Copyright (c) 1999
 *      Bill Paul <wpaul@ctr.columbia.edu>.  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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Bill Paul.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
 * 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.
 *
 * $FreeBSD: src/sbin/ifconfig/ifvlan.c,v 1.7.2.4 2006/02/09 10:48:43 yar Exp $
 */

#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/sockio.h>

#include <net/if.h>
#include <net/if_var.h>
#include <net/route.h>
#include <net/ethernet.h>
#include <net/vlan/if_vlan_var.h>

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

#include "ifconfig.h"

static struct vlanreq           __vreq;
static int                      __have_dev = 0;
static int                      __have_tag = 0;

static void
vlan_status(int s)
{
        struct vlanreq          vreq;
        struct ifreq            ifr;

        memset(&ifr, 0, sizeof(ifr));
        memset(&vreq, 0, sizeof(vreq));

        strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name));
        ifr.ifr_data = &vreq;

        if (ioctl(s, SIOCGETVLAN, &ifr) == -1)
                return;

        printf("\tvlan: %d parent interface: %s\n", vreq.vlr_tag,
               vreq.vlr_parent[0] == '\0' ? "<none>" : vreq.vlr_parent);
}

static void
setvlantag(const char *val, int d __unused, int s __unused,
           const struct afswtch *afp __unused)
{
        char                    *endp;
        u_long                  ul;

        ul = strtoul(val, &endp, 0);
        if (*endp != '\0')
                errx(1, "invalid value for vlan");
        __vreq.vlr_tag = ul;
        /* check if the value can be represented in vlr_tag */
        if (__vreq.vlr_tag != ul)
                errx(1, "value for vlan out of range");
        /* the kernel will do more specific checks on vlr_tag */
        __have_tag = 1;
}

static void
setvlandev(const char *val, int d __unused, int s __unused,
           const struct afswtch *afp __unused)
{
        strlcpy(__vreq.vlr_parent, val, sizeof(__vreq.vlr_parent));
        __have_dev = 1;
}

static void
unsetvlandev(const char *val, int d __unused, int s,
             const struct afswtch *afp __unused)
{
        struct ifreq            ifr;

        if (val != NULL)
                warnx("argument to -vlandev is useless and hence deprecated");

        memset(&ifr, 0, sizeof(ifr));
        memset(&__vreq, 0, sizeof(__vreq));

        strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name));
        ifr.ifr_data = &__vreq;

#if 0   /* this code will be of use when we can alter vlan or vlandev only */
        if (ioctl(s, SIOCGETVLAN, &ifr) == -1)
                err(1, "SIOCGETVLAN");

        memset(&__vreq.vlr_parent, 0, sizeof(__vreq.vlr_parent));
        __vreq.vlr_tag = 0; /* XXX clear parent only (no kernel support now) */
#endif

        if (ioctl(s, SIOCSETVLAN, &ifr) == -1)
                err(1, "SIOCSETVLAN");
        __have_dev = __have_tag = 0;
}

static void
vlan_cb(int s, void *arg __unused)
{
        struct ifreq            ifr;

        if (__have_tag ^ __have_dev)
                errx(1, "both vlan and vlandev must be specified");

        if (__have_tag && __have_dev) {
                memset(&ifr, 0, sizeof(ifr));
                strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name));
                ifr.ifr_data = &__vreq;
                if (ioctl(s, SIOCSETVLAN, &ifr) == -1)
                        err(1, "SIOCSETVLAN");
        }
}

static struct cmd vlan_cmds[] = {
        DEF_CMD_ARG("vlan",                             setvlantag),
        DEF_CMD_ARG("vlandev",                          setvlandev),
        /* XXX For compatibility.  Should become DEF_CMD() some day. */
        DEF_CMD_OPTARG("-vlandev",                      unsetvlandev),
        DEF_CMD("vlanmtu",      IFCAP_VLAN_MTU,         setifcap),
        DEF_CMD("-vlanmtu",     -IFCAP_VLAN_MTU,        setifcap),
        DEF_CMD("vlanhwtag",    IFCAP_VLAN_HWTAGGING,   setifcap),
        DEF_CMD("-vlanhwtag",   -IFCAP_VLAN_HWTAGGING,  setifcap),
};
static struct afswtch af_vlan = {
        .af_name        = "af_vlan",
        .af_af          = AF_UNSPEC,
        .af_other_status = vlan_status,
};

__constructor(124)
static void
vlan_ctor(void)
{
        size_t i;

        for (i = 0; i < nitems(vlan_cmds);  i++)
                cmd_register(&vlan_cmds[i]);

        af_register(&af_vlan);
        callback_register(vlan_cb, NULL);
}