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
parse_show_opts(int argc,char * const * argv,int * afp,int * flagsp,const char ** afnamep,bool nolink)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
show(int argc,char * const * argv,int flags)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