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 $
4 * $DragonFly: src/sbin/route/show.c,v 1.6 2006/01/19 22:19:30 dillon Exp $
7 * Copyright (c) 1983, 1988, 1993
8 * The Regents of the University of California. All rights reserved.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/param.h>
36 #include <sys/protosw.h>
37 #include <sys/socket.h>
41 #include <net/if_dl.h>
42 #include <net/if_types.h>
43 #include <net/route.h>
44 #include <netinet/in.h>
45 #include <arpa/inet.h>
47 #include <sys/sysctl.h>
60 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
61 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
64 * Definitions for showing gateway flags.
70 static const struct bits bits[] = {
75 { RTF_BLACKHOLE, 'B' },
77 { RTF_MODIFIED, 'M' },
78 { RTF_DONE, 'd' }, /* Completed -- for routing messages only */
80 { RTF_XRESOLVE, 'X' },
89 static void p_rtentry(struct rt_msghdr *);
90 static int p_sockaddr(struct sockaddr *, int, int);
91 static void p_flags(int, const char *);
92 static void pr_rthdr(void);
93 static void pr_family(int);
96 * Print routing tables.
99 show(int argc, char *argv[])
101 struct rt_msghdr *rtm;
102 char *buf = NULL, *next, *lim = NULL;
110 if (argc == 2 && **argv == '-') {
111 switch (keyword(*argv + 1)) {
143 mib[4] = NET_RT_DUMP;
151 if (sysctl(mib, miblen, NULL, &needed, NULL, 0) < 0) {
152 perror("route-sysctl-estimate");
156 if ((buf = malloc(needed)) == NULL) {
157 printf("out of space\n");
160 if (sysctl(mib, miblen, buf, &needed, NULL, 0) < 0) {
161 perror("sysctl of routing table");
167 printf("Routing tables\n");
170 for (next = buf; next < lim; next += rtm->rtm_msglen) {
171 rtm = (struct rt_msghdr *)next;
172 sa = (struct sockaddr *)(rtm + 1);
173 if (af != 0 && sa->sa_family != af)
181 /* column widths; each followed by one space */
182 #define WID_DST (nflag ? 20 : 32) /* destination column width */
183 #define WID_GW (nflag ? 20 : 32) /* gateway column width */
186 * Print header for routing table columns.
191 printf("%-*.*s %-*.*s %-6.6s\n",
192 WID_DST, WID_DST, "Destination",
193 WID_GW, WID_GW, "Gateway",
198 * Print a routing table entry.
201 p_rtentry(struct rt_msghdr *rtm)
203 struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
205 static int masks_done, banner_printed;
208 int af = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST;
212 /* for the moment, netmasks are skipped over */
213 if (!banner_printed) {
214 printf("Netmasks:\n");
217 if (masks_done == 0) {
218 if (rtm->rtm_addrs != RTA_DST) {
232 * Print the information. If wflag is set p_sockaddr() can return
233 * a wider width then specified and we try to fit the second
234 * address in any remaining space so the flags still lines up.
236 if (rtm->rtm_addrs == RTA_DST) {
237 p_sockaddr(sa, 0, WID_DST + WID_GW + 2);
239 width = p_sockaddr(sa, rtm->rtm_flags, WID_DST);
240 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa);
241 p_sockaddr(sa, 0, WID_GW + WID_DST - width);
243 p_flags(rtm->rtm_flags & interesting, "%-6.6s ");
248 * Print address family header before a section of the routing table.
261 afname = "Internet6";
277 afname = "AppleTalk";
284 printf("\n%s:\n", afname);
286 printf("\nProtocol Family %d:\n", af);
290 p_sockaddr(struct sockaddr *sa, int flags, int width)
295 int len = sizeof(workbuf);
298 switch(sa->sa_family) {
302 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
304 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
305 sdl->sdl_slen == 0) {
306 snprintf(workbuf, sizeof(workbuf),
307 "link#%d", sdl->sdl_index);
309 switch (sdl->sdl_type) {
313 u_char *lla = (u_char *)sdl->sdl_data +
317 for (i = 0; i < sdl->sdl_alen; i++, lla++) {
318 snprintf(cp, len, "%s%x", cplim, *lla);
322 break; /* overflow */
338 struct sockaddr_in *in = (struct sockaddr_in *)sa;
340 if (in->sin_addr.s_addr == 0) {
341 /* cp points to workbuf */
342 strncpy(cp, "default", len);
344 cp = (flags & RTF_HOST) ? routename(sa) : netname(sa);
351 struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)sa;
353 if (IN6_IS_ADDR_UNSPECIFIED(&in6->sin6_addr)) {
354 /* cp points to workbuf */
355 strncpy(cp, "default", len);
357 cp = ((flags & RTF_HOST) ? routename(sa)
360 /* make sure numeric address is not truncated */
361 if (strchr(cp, ':') != NULL &&
362 (width < 0 || strlen(cp) > (size_t)width))
370 u_char *s = (u_char *)sa->sa_data, *slim;
372 slim = sa->sa_len + (u_char *) sa;
373 cplim = cp + sizeof(workbuf) - 6;
374 snprintf(cp, len, "(%d)", sa->sa_family);
379 break; /* overflow */
381 while (s < slim && cp < cplim) {
382 snprintf(cp, len, " %02x", *s++);
386 break; /* overflow */
388 snprintf(cp, len, "%02x", *s++);
392 break; /* overflow */
399 count = printf("%s ", cp);
402 count = printf("%-*s ", width, cp);
404 count = printf("%-*.*s ", width, width, cp);
410 p_flags(int f, const char *format)
412 char name[33], *flags;
413 const struct bits *p = bits;
415 for (flags = name; p->b_mask && flags < &name[sizeof(name-2)]; p++) {
420 printf(format, name);