/*      $NetBSD: show.c,v 1.51 2020/08/29 19:28:32 christos Exp $       */

/*
 * Copyright (c) 1983, 1988, 1993
 *      The Regents of the University of California.  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. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 THE REGENTS 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/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "from: @(#)route.c       8.3 (Berkeley) 3/9/94";
#else
__RCSID("$NetBSD: show.c,v 1.51 2020/08/29 19:28:32 christos Exp $");
#endif
#endif /* not lint */

#include <sys/param.h>
#include <sys/protosw.h>
#include <sys/socket.h>

#include <arpa/inet.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netmpls/mpls.h>

#include <sys/sysctl.h>

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

#include "keywords.h"
#include "rtutil.h"
#include "extern.h"
#include "prog_ops.h"

void
parse_show_opts(int argc, char * const *argv, int *afp, int *flagsp,
    const char **afnamep, bool nolink)
{
        const char *afname = "unspec";
        int af, flags;

        flags = 0;
        af = AF_UNSPEC;
        for (; argc >= 2; argc--) {
                if (*argv[argc - 1] != '-')
                        goto bad;
                switch (keyword(argv[argc - 1] + 1)) {
                case K_HOST:
                        flags |= RTF_HOST;
                        break;
                case K_INET:
                        af = AF_INET;
                        afname = argv[argc - 1] + 1;
                        break;
#ifdef INET6
                case K_INET6:
                        af = AF_INET6;
                        afname = argv[argc - 1] + 1;
                        break;
#endif
#ifndef SMALL
                case K_ATALK:
                        af = AF_APPLETALK;
                        afname = argv[argc - 1] + 1;
                        break;
                case K_MPLS:
                        af = AF_MPLS;
                        afname = argv[argc - 1] + 1;
                        break;
#endif /* SMALL */
                case K_LINK:
                        if (nolink)
                                goto bad;
                        af = AF_LINK;
                        afname = argv[argc - 1] + 1;
                        break;
                default:
                        goto bad;
                }
        }
        switch (argc) {
        case 1:
        case 0:
                break;
        default:
        bad:
                usage(argv[argc - 1]);
        }
        if (afnamep != NULL)
                *afnamep = afname;
        *afp = af;
        *flagsp = flags;
}

/*
 * Print routing tables.
 */
void
show(int argc, char *const *argv, int flags)
{
        int af, rflags;
        static int interesting = RTF_ANNOUNCE | RTF_BLACKHOLE | RTF_BROADCAST |
            RTF_CONNECTED | RTF_DYNAMIC | RTF_GATEWAY | RTF_HOST | RTF_LLDATA |
            RTF_LOCAL | RTF_MODIFIED | RTF_PROTO1 | RTF_PROTO2 | RTF_REJECT |
            RTF_STATIC | RTF_UP;

        parse_show_opts(argc, argv, &af, &rflags, NULL, true);
        p_rttables(af, flags, rflags, interesting);
}