2 * $OpenBSD: show.c,v 1.26 2003/08/26 08:33:12 itojun Exp $
3 * $NetBSD: show.c,v 1.1 1996/11/15 18:01:41 gwr Exp $
6 * Copyright (c) 1983, 1988, 1993
7 * The Regents of the University of California. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include <sys/param.h>
35 #include <sys/protosw.h>
36 #include <sys/socket.h>
40 #include <net/if_dl.h>
41 #include <net/if_types.h>
42 #include <net/route.h>
43 #include <netinet/in.h>
44 #include <arpa/inet.h>
46 #include <sys/sysctl.h>
58 * Definitions for showing gateway flags.
64 static const struct bits bits
[] = {
69 { RTF_BLACKHOLE
, 'B' },
71 { RTF_MODIFIED
, 'M' },
72 { RTF_DONE
, 'd' }, /* Completed -- for routing messages only */
74 { RTF_XRESOLVE
, 'X' },
83 static __unused
struct keytab
{
86 } const keywords
[] = {
91 static void p_rtentry(struct rt_msghdr
*);
92 static int p_sockaddr(struct sockaddr
*, int, int);
93 static void p_flags(int, const char *);
94 static void pr_rthdr(void);
95 static void pr_family(int);
98 * Print routing tables.
101 show(int argc
, char *argv
[])
103 struct rt_msghdr
*rtm
;
104 char *buf
= NULL
, *next
, *lim
= NULL
;
112 if (argc
== 2 && **argv
== '-') {
113 switch (keyword(*argv
+ 1)) {
138 mib
[4] = NET_RT_DUMP
;
146 if (sysctl(mib
, miblen
, NULL
, &needed
, NULL
, 0) < 0) {
147 perror("route-sysctl-estimate");
151 if ((buf
= malloc(needed
)) == NULL
) {
152 printf("out of space\n");
155 if (sysctl(mib
, miblen
, buf
, &needed
, NULL
, 0) < 0) {
156 perror("sysctl of routing table");
162 printf("Routing tables\n");
165 for (next
= buf
; next
< lim
; next
+= rtm
->rtm_msglen
) {
166 rtm
= (struct rt_msghdr
*)next
;
167 sa
= (struct sockaddr
*)(rtm
+ 1);
168 if (af
!= 0 && sa
->sa_family
!= af
)
176 /* column widths; each followed by one space */
177 #define WID_DST (nflag ? 20 : 32) /* destination column width */
178 #define WID_GW (nflag ? 20 : 32) /* gateway column width */
181 * Print header for routing table columns.
186 printf("%-*.*s %-*.*s %-6.6s\n",
187 WID_DST
, WID_DST
, "Destination",
188 WID_GW
, WID_GW
, "Gateway",
193 * Print a routing table entry.
196 p_rtentry(struct rt_msghdr
*rtm
)
198 struct sockaddr
*sa
= (struct sockaddr
*)(rtm
+ 1);
200 static int masks_done
, banner_printed
;
203 int af
= 0, interesting
= RTF_UP
| RTF_GATEWAY
| RTF_HOST
;
207 /* for the moment, netmasks are skipped over */
208 if (!banner_printed
) {
209 printf("Netmasks:\n");
212 if (masks_done
== 0) {
213 if (rtm
->rtm_addrs
!= RTA_DST
) {
227 * Print the information. If wflag is set p_sockaddr() can return
228 * a wider width then specified and we try to fit the second
229 * address in any remaining space so the flags still lines up.
231 if (rtm
->rtm_addrs
== RTA_DST
) {
232 p_sockaddr(sa
, 0, WID_DST
+ WID_GW
+ 2);
234 width
= p_sockaddr(sa
, rtm
->rtm_flags
, WID_DST
);
235 sa
= (struct sockaddr
*)(RT_ROUNDUP(sa
->sa_len
) + (char *)sa
);
236 p_sockaddr(sa
, 0, WID_GW
+ WID_DST
- width
);
238 p_flags(rtm
->rtm_flags
& interesting
, "%-6.6s ");
243 * Print address family header before a section of the routing table.
256 afname
= "Internet6";
267 printf("\n%s:\n", afname
);
269 printf("\nProtocol Family %d:\n", af
);
273 p_sockaddr(struct sockaddr
*sa
, int flags
, int width
)
278 int len
= sizeof(workbuf
);
281 switch(sa
->sa_family
) {
285 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*)sa
;
287 if (sdl
->sdl_nlen
== 0 && sdl
->sdl_alen
== 0 &&
288 sdl
->sdl_slen
== 0) {
289 snprintf(workbuf
, sizeof(workbuf
),
290 "link#%d", sdl
->sdl_index
);
292 switch (sdl
->sdl_type
) {
298 u_char
*lla
= (u_char
*)sdl
->sdl_data
+
302 for (i
= 0; i
< sdl
->sdl_alen
; i
++, lla
++) {
303 snprintf(cp
, len
, "%s%02x",
308 break; /* overflow */
324 struct sockaddr_in
*in
= (struct sockaddr_in
*)sa
;
326 if (in
->sin_addr
.s_addr
== 0) {
327 /* cp points to workbuf */
328 strncpy(cp
, "default", len
);
330 cp
= (flags
& RTF_HOST
) ? routename(sa
) : netname(sa
);
337 struct sockaddr_in6
*in6
= (struct sockaddr_in6
*)sa
;
339 if (IN6_IS_ADDR_UNSPECIFIED(&in6
->sin6_addr
)) {
340 /* cp points to workbuf */
341 strncpy(cp
, "default", len
);
343 cp
= ((flags
& RTF_HOST
) ? routename(sa
)
346 /* make sure numeric address is not truncated */
347 if (strchr(cp
, ':') != NULL
&&
348 (width
< 0 || strlen(cp
) > (size_t)width
))
356 u_char
*s
= (u_char
*)sa
->sa_data
, *slim
;
358 slim
= sa
->sa_len
+ (u_char
*) sa
;
359 cplim
= cp
+ sizeof(workbuf
) - 6;
360 snprintf(cp
, len
, "(%d)", sa
->sa_family
);
365 break; /* overflow */
367 while (s
< slim
&& cp
< cplim
) {
368 snprintf(cp
, len
, " %02x", *s
++);
372 break; /* overflow */
374 snprintf(cp
, len
, "%02x", *s
++);
378 break; /* overflow */
385 count
= printf("%s ", cp
);
388 count
= printf("%-*s ", width
, cp
);
390 count
= printf("%-*.*s ", width
, width
, cp
);
396 p_flags(int f
, const char *format
)
398 char name
[33], *flags
;
399 const struct bits
*p
= bits
;
401 for (flags
= name
; p
->b_mask
&& flags
< &name
[sizeof(name
) - 2]; p
++) {
406 printf(format
, name
);