sbin/route/show.c

   1 /*      $NetBSD: show.c,v 1.48 2015/03/23 18:33:17 roy 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 1.48 2015/03/23 18:33:17 roy Exp $");
  38 #endif
  39 #endif /* not lint */
  40
  41 #include <sys/param.h>
  42 #include <sys/protosw.h>
  43 #include <sys/socket.h>
  44 #include <sys/mbuf.h>
  45
  46 #include <arpa/inet.h>
  47 #include <net/if.h>
  48 #include <net/if_dl.h>
  49 #include <net/if_types.h>
  50 #include <net/route.h>
  51 #include <netinet/in.h>
  52 #include <netmpls/mpls.h>
  53
  54 #include <sys/sysctl.h>
  55
  56 #include <netdb.h>
  57 #include <stdbool.h>
  58 #include <stdio.h>
  59 #include <stdlib.h>
  60 #include <string.h>
  61 #include <unistd.h>
  62 #include <err.h>
  63
  64 #include "keywords.h"
  65 #include "rtutil.h"
  66 #include "extern.h"
  67 #include "prog_ops.h"
  68
  69 void
  70 parse_show_opts(int argc, char * const *argv, int *afp, int *flagsp,
  71     const char **afnamep, bool nolink)
  72 {
  73         const char *afname = "unspec";
  74         int af, flags;
  75
  76         flags = 0;
  77         af = AF_UNSPEC;
  78         for (; argc >= 2; argc--) {
  79                 if (*argv[argc - 1] != '-')
  80                         goto bad;
  81                 switch (keyword(argv[argc - 1] + 1)) {
  82                 case K_HOST:
  83                         flags |= RTF_HOST;
  84                         break;
  85                 case K_LLINFO:
  86                         flags |= RTF_LLINFO;
  87                         break;
  88                 case K_INET:
  89                         af = AF_INET;
  90                         afname = argv[argc - 1] + 1;
  91                         break;
  92 #ifdef INET6
  93                 case K_INET6:
  94                         af = AF_INET6;
  95                         afname = argv[argc - 1] + 1;
  96                         break;
  97 #endif
  98 #ifndef SMALL
  99                 case K_ATALK:
 100                         af = AF_APPLETALK;
 101                         afname = argv[argc - 1] + 1;
 102                         break;
 103                 case K_MPLS:
 104                         af = AF_MPLS;
 105                         afname = argv[argc - 1] + 1;
 106                         break;
 107 #endif /* SMALL */
 108                 case K_LINK:
 109                         if (nolink)
 110                                 goto bad;
 111                         af = AF_LINK;
 112                         afname = argv[argc - 1] + 1;
 113                         break;
 114                 default:
 115                         goto bad;
 116                 }
 117         }
 118         switch (argc) {
 119         case 1:
 120         case 0:
 121                 break;
 122         default:
 123         bad:
 124                 usage(argv[argc - 1]);
 125         }
 126         if (afnamep != NULL)
 127                 *afnamep = afname;
 128         *afp = af;
 129         *flagsp = flags;
 130 }
 131
 132 /*
 133  * Print routing tables.
 134  */
 135 void
 136 show(int argc, char *const *argv, int flags)
 137 {
 138         int af, rflags;
 139         static int interesting = RTF_UP | RTF_GATEWAY | RTF_HOST |
 140             RTF_REJECT | RTF_LLINFO | RTF_LOCAL | RTF_BROADCAST;
 141
 142         parse_show_opts(argc, argv, &af, &rflags, NULL, true);
 143         p_rttables(af, flags, rflags, interesting);
 144 }