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      1 /*	$NetBSD: show.c,v 1.51 2020/08/29 19:28:32 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1983, 1988, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "from: @(#)route.c	8.3 (Berkeley) 3/9/94";
     36 #else
     37 __RCSID("$NetBSD: show.c,v 1.51 2020/08/29 19:28:32 christos Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 #include <sys/param.h>
     42 #include <sys/protosw.h>
     43 #include <sys/socket.h>
     44 
     45 #include <arpa/inet.h>
     46 #include <net/if.h>
     47 #include <net/if_dl.h>
     48 #include <net/if_types.h>
     49 #include <net/route.h>
     50 #include <netinet/in.h>
     51 #include <netmpls/mpls.h>
     52 
     53 #include <sys/sysctl.h>
     54 
     55 #include <netdb.h>
     56 #include <stdbool.h>
     57 #include <stdio.h>
     58 #include <stdlib.h>
     59 #include <string.h>
     60 #include <unistd.h>
     61 #include <err.h>
     62 
     63 #include "keywords.h"
     64 #include "rtutil.h"
     65 #include "extern.h"
     66 #include "prog_ops.h"
     67 
     68 void
     69 parse_show_opts(int argc, char * const *argv, int *afp, int *flagsp,
     70     const char **afnamep, bool nolink)
     71 {
     72 	const char *afname = "unspec";
     73 	int af, flags;
     74 
     75 	flags = 0;
     76 	af = AF_UNSPEC;
     77 	for (; argc >= 2; argc--) {
     78 		if (*argv[argc - 1] != '-')
     79 			goto bad;
     80 		switch (keyword(argv[argc - 1] + 1)) {
     81 		case K_HOST:
     82 			flags |= RTF_HOST;
     83 			break;
     84 		case K_INET:
     85 			af = AF_INET;
     86 			afname = argv[argc - 1] + 1;
     87 			break;
     88 #ifdef INET6
     89 		case K_INET6:
     90 			af = AF_INET6;
     91 			afname = argv[argc - 1] + 1;
     92 			break;
     93 #endif
     94 #ifndef SMALL
     95 		case K_ATALK:
     96 			af = AF_APPLETALK;
     97 			afname = argv[argc - 1] + 1;
     98 			break;
     99 		case K_MPLS:
    100 			af = AF_MPLS;
    101 			afname = argv[argc - 1] + 1;
    102 			break;
    103 #endif /* SMALL */
    104 		case K_LINK:
    105 			if (nolink)
    106 				goto bad;
    107 			af = AF_LINK;
    108 			afname = argv[argc - 1] + 1;
    109 			break;
    110 		default:
    111 			goto bad;
    112 		}
    113 	}
    114 	switch (argc) {
    115 	case 1:
    116 	case 0:
    117 		break;
    118 	default:
    119 	bad:
    120 		usage(argv[argc - 1]);
    121 	}
    122 	if (afnamep != NULL)
    123 		*afnamep = afname;
    124 	*afp = af;
    125 	*flagsp = flags;
    126 }
    127 
    128 /*
    129  * Print routing tables.
    130  */
    131 void
    132 show(int argc, char *const *argv, int flags)
    133 {
    134 	int af, rflags;
    135 	static int interesting = RTF_ANNOUNCE | RTF_BLACKHOLE | RTF_BROADCAST |
    136 	    RTF_CONNECTED | RTF_DYNAMIC | RTF_GATEWAY | RTF_HOST | RTF_LLDATA |
    137 	    RTF_LOCAL | RTF_MODIFIED | RTF_PROTO1 | RTF_PROTO2 | RTF_REJECT |
    138 	    RTF_STATIC | RTF_UP;
    139 
    140 	parse_show_opts(argc, argv, &af, &rflags, NULL, true);
    141 	p_rttables(af, flags, rflags, interesting);
    142 }
    143