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 1.5 2005/03/16 07:30:33 cpressey 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>
46 #include <arpa/inet.h>
48 #include <sys/sysctl.h>
61 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
62 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
65 * Definitions for showing gateway flags.
71 static const struct bits bits[] = {
76 { RTF_BLACKHOLE, 'B' },
78 { RTF_MODIFIED, 'M' },
79 { RTF_DONE, 'd' }, /* Completed -- for routing messages only */
81 { RTF_XRESOLVE, 'X' },
90 static void p_rtentry(struct rt_msghdr *);
91 static int p_sockaddr(struct sockaddr *, int, int);
92 static void p_flags(int, const char *);
93 static void pr_rthdr(void);
94 static void pr_family(int);
97 * Print routing tables.
100 show(int argc, char *argv[])
102 struct rt_msghdr *rtm;
103 char *buf = NULL, *next, *lim = NULL;
110 if (argc == 2 && **argv == '-') {
111 switch (keyword(*argv + 1)) {
143 mib[4] = NET_RT_DUMP;
145 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
146 perror("route-sysctl-estimate");
150 if ((buf = malloc(needed)) == NULL) {
151 printf("out of space\n");
154 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
155 perror("sysctl of routing table");
161 printf("Routing tables\n");
164 for (next = buf; next < lim; next += rtm->rtm_msglen) {
165 rtm = (struct rt_msghdr *)next;
166 sa = (struct sockaddr *)(rtm + 1);
167 if (af != 0 && sa->sa_family != af)
175 /* column widths; each followed by one space */
176 #define WID_DST (nflag ? 20 : 32) /* destination column width */
177 #define WID_GW (nflag ? 20 : 32) /* gateway column width */
180 * Print header for routing table columns.
185 printf("%-*.*s %-*.*s %-6.6s\n",
186 WID_DST, WID_DST, "Destination",
187 WID_GW, WID_GW, "Gateway",
192 * Print a routing table entry.
195 p_rtentry(struct rt_msghdr *rtm)
197 struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
199 static int masks_done, banner_printed;
202 int af = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST;
206 /* for the moment, netmasks are skipped over */
207 if (!banner_printed) {
208 printf("Netmasks:\n");
211 if (masks_done == 0) {
212 if (rtm->rtm_addrs != RTA_DST) {
226 * Print the information. If wflag is set p_sockaddr() can return
227 * a wider width then specified and we try to fit the second
228 * address in any remaining space so the flags still lines up.
230 if (rtm->rtm_addrs == RTA_DST) {
231 p_sockaddr(sa, 0, WID_DST + WID_GW + 2);
233 width = p_sockaddr(sa, rtm->rtm_flags, WID_DST);
234 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa);
235 p_sockaddr(sa, 0, WID_GW + WID_DST - width);
237 p_flags(rtm->rtm_flags & interesting, "%-6.6s ");
242 * Print address family header before a section of the routing table.
255 afname = "Internet6";
271 afname = "AppleTalk";
278 printf("\n%s:\n", afname);
280 printf("\nProtocol Family %d:\n", af);
284 p_sockaddr(struct sockaddr *sa, int flags, int width)
289 int len = sizeof(workbuf);
292 switch(sa->sa_family) {
296 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
298 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
299 sdl->sdl_slen == 0) {
300 snprintf(workbuf, sizeof(workbuf),
301 "link#%d", sdl->sdl_index);
303 switch (sdl->sdl_type) {
307 u_char *lla = (u_char *)sdl->sdl_data +
311 for (i = 0; i < sdl->sdl_alen; i++, lla++) {
312 snprintf(cp, len, "%s%x", cplim, *lla);
316 break; /* overflow */
332 struct sockaddr_in *in = (struct sockaddr_in *)sa;
334 if (in->sin_addr.s_addr == 0) {
335 /* cp points to workbuf */
336 strncpy(cp, "default", len);
338 cp = (flags & RTF_HOST) ? routename(sa) : netname(sa);
345 struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)sa;
347 if (IN6_IS_ADDR_UNSPECIFIED(&in6->sin6_addr)) {
348 /* cp points to workbuf */
349 strncpy(cp, "default", len);
351 cp = ((flags & RTF_HOST) ? routename(sa)
354 /* make sure numeric address is not truncated */
355 if (strchr(cp, ':') != NULL &&
356 (width < 0 || strlen(cp) > (size_t)width))
363 cp = ns_print((struct sockaddr_ns *)sa);
368 u_char *s = (u_char *)sa->sa_data, *slim;
370 slim = sa->sa_len + (u_char *) sa;
371 cplim = cp + sizeof(workbuf) - 6;
372 snprintf(cp, len, "(%d)", sa->sa_family);
377 break; /* overflow */
379 while (s < slim && cp < cplim) {
380 snprintf(cp, len, " %02x", *s++);
384 break; /* overflow */
386 snprintf(cp, len, "%02x", *s++);
390 break; /* overflow */
397 count = printf("%s ", cp);
400 count = printf("%-*s ", width, cp);
402 count = printf("%-*.*s ", width, width, cp);
408 p_flags(int f, const char *format)
410 char name[33], *flags;
411 const struct bits *p = bits;
413 for (flags = name; p->b_mask && flags < &name[sizeof(name-2)]; p++) {
418 printf(format, name);