1 /* $NetBSD: show.c,v 1.1 1996/11/15 18:01:41 gwr 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "from: @(#)route.c 8.3 (Berkeley) 3/9/94"; 39 #else 40 static char *rcsid = "$NetBSD: show.c,v 1.1 1996/11/15 18:01:41 gwr Exp $"; 41 #endif 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/protosw.h> 46 #include <sys/socket.h> 47 #include <sys/mbuf.h> 48 49 #include <net/if.h> 50 #include <net/if_dl.h> 51 #include <net/if_types.h> 52 #include <net/route.h> 53 #include <netinet/in.h> 54 #include <netns/ns.h> 55 56 #include <sys/sysctl.h> 57 58 #include <netdb.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <unistd.h> 63 64 /* XXX: things from route.c */ 65 extern char * routename __P((struct sockaddr *)); 66 extern char * netname __P((struct sockaddr *)); 67 extern char * ns_print __P((struct sockaddr_ns *)); 68 extern int nflag; 69 70 71 /* 72 * Definitions for showing gateway flags. 73 */ 74 struct bits { 75 short b_mask; 76 char b_val; 77 }; 78 static const struct bits bits[] = { 79 { RTF_UP, 'U' }, 80 { RTF_GATEWAY, 'G' }, 81 { RTF_HOST, 'H' }, 82 { RTF_REJECT, 'R' }, 83 { RTF_DYNAMIC, 'D' }, 84 { RTF_MODIFIED, 'M' }, 85 { RTF_DONE, 'd' }, /* Completed -- for routing messages only */ 86 { RTF_MASK, 'm' }, /* Mask Present -- for routing messages only */ 87 { RTF_CLONING, 'C' }, 88 { RTF_XRESOLVE, 'X' }, 89 { RTF_LLINFO, 'L' }, 90 { RTF_STATIC, 'S' }, 91 { RTF_PROTO1, '1' }, 92 { RTF_PROTO2, '2' }, 93 { 0 } 94 }; 95 96 97 static void p_rtentry __P((struct rt_msghdr *)); 98 static void p_sockaddr __P((struct sockaddr *, int, int)); 99 static void p_flags __P((int, char *)); 100 static void pr_rthdr __P((void)); 101 static void pr_family __P((int)); 102 103 104 /* 105 * Print routing tables. 106 */ 107 void 108 show(argc, argv) 109 int argc; 110 char **argv; 111 { 112 size_t needed; 113 int mib[6]; 114 char *buf, *next, *lim; 115 register struct rt_msghdr *rtm; 116 int i; 117 118 mib[0] = CTL_NET; 119 mib[1] = PF_ROUTE; 120 mib[2] = 0; 121 mib[3] = 0; 122 mib[4] = NET_RT_DUMP; 123 mib[5] = 0; 124 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) { 125 perror("route-sysctl-estimate"); 126 exit(1); 127 } 128 if ((buf = malloc(needed)) == 0) { 129 printf("out of space\n"); 130 exit(1); 131 } 132 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 133 perror("sysctl of routing table"); 134 exit(1); 135 } 136 lim = buf + needed; 137 138 printf("Routing tables\n"); 139 140 /* for (i = 0; i <= AF_MAX; i++) ??? */ 141 { 142 for (next = buf; next < lim; next += rtm->rtm_msglen) { 143 rtm = (struct rt_msghdr *)next; 144 p_rtentry(rtm); 145 } 146 } 147 } 148 149 150 /* column widths; each followed by one space */ 151 #define WID_DST 16 /* width of destination column */ 152 #define WID_GW 18 /* width of gateway column */ 153 154 /* 155 * Print header for routing table columns. 156 */ 157 static void 158 pr_rthdr() 159 { 160 161 printf("%-*.*s %-*.*s %-6.6s\n", 162 WID_DST, WID_DST, "Destination", 163 WID_GW, WID_GW, "Gateway", 164 "Flags"); 165 } 166 167 168 /* 169 * Print a routing table entry. 170 */ 171 static void 172 p_rtentry(rtm) 173 register struct rt_msghdr *rtm; 174 { 175 register struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 176 #ifdef notdef 177 static int masks_done, banner_printed; 178 #endif 179 static int old_af; 180 int af = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST; 181 182 #ifdef notdef 183 /* for the moment, netmasks are skipped over */ 184 if (!banner_printed) { 185 printf("Netmasks:\n"); 186 banner_printed = 1; 187 } 188 if (masks_done == 0) { 189 if (rtm->rtm_addrs != RTA_DST ) { 190 masks_done = 1; 191 af = sa->sa_family; 192 } 193 } else 194 #endif 195 af = sa->sa_family; 196 if (old_af != af) { 197 old_af = af; 198 pr_family(af); 199 pr_rthdr(); 200 } 201 if (rtm->rtm_addrs == RTA_DST) 202 p_sockaddr(sa, 0, 36); 203 else { 204 p_sockaddr(sa, rtm->rtm_flags, 16); 205 if (sa->sa_len == 0) 206 sa->sa_len = sizeof(long); 207 sa = (struct sockaddr *)(sa->sa_len + (char *)sa); 208 p_sockaddr(sa, 0, 18); 209 } 210 p_flags(rtm->rtm_flags & interesting, "%-6.6s "); 211 putchar('\n'); 212 } 213 214 215 /* 216 * Print address family header before a section of the routing table. 217 */ 218 static void 219 pr_family(af) 220 int af; 221 { 222 char *afname; 223 224 switch (af) { 225 case AF_INET: 226 afname = "Internet"; 227 break; 228 #ifndef SMALL 229 case AF_NS: 230 afname = "XNS"; 231 break; 232 case AF_ISO: 233 afname = "ISO"; 234 break; 235 case AF_CCITT: 236 afname = "X.25"; 237 break; 238 #endif /* SMALL */ 239 default: 240 afname = NULL; 241 break; 242 } 243 if (afname) 244 printf("\n%s:\n", afname); 245 else 246 printf("\nProtocol Family %d:\n", af); 247 } 248 249 250 static void 251 p_sockaddr(sa, flags, width) 252 struct sockaddr *sa; 253 int flags, width; 254 { 255 char workbuf[128], *cplim; 256 register char *cp = workbuf; 257 258 switch(sa->sa_family) { 259 260 case AF_LINK: 261 { 262 register struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 263 264 if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && 265 sdl->sdl_slen == 0) 266 (void) sprintf(workbuf, "link#%d", sdl->sdl_index); 267 else switch (sdl->sdl_type) { 268 case IFT_ETHER: 269 { 270 register int i; 271 register u_char *lla = (u_char *)sdl->sdl_data + 272 sdl->sdl_nlen; 273 274 cplim = ""; 275 for (i = 0; i < sdl->sdl_alen; i++, lla++) { 276 cp += sprintf(cp, "%s%x", cplim, *lla); 277 cplim = ":"; 278 } 279 cp = workbuf; 280 break; 281 } 282 default: 283 cp = link_ntoa(sdl); 284 break; 285 } 286 break; 287 } 288 289 case AF_INET: 290 { 291 register struct sockaddr_in *sin = (struct sockaddr_in *)sa; 292 293 cp = (sin->sin_addr.s_addr == 0) ? "default" : 294 ((flags & RTF_HOST) ? 295 routename(sa) : netname(sa)); 296 break; 297 } 298 299 #ifndef SMALL 300 case AF_NS: 301 cp = ns_print((struct sockaddr_ns *)sa); 302 break; 303 #endif /* SMALL */ 304 305 default: 306 { 307 register u_char *s = (u_char *)sa->sa_data, *slim; 308 309 slim = sa->sa_len + (u_char *) sa; 310 cplim = cp + sizeof(workbuf) - 6; 311 cp += sprintf(cp, "(%d)", sa->sa_family); 312 while (s < slim && cp < cplim) { 313 cp += sprintf(cp, " %02x", *s++); 314 if (s < slim) 315 cp += sprintf(cp, "%02x", *s++); 316 } 317 cp = workbuf; 318 } 319 } 320 if (width < 0 ) 321 printf("%s ", cp); 322 else { 323 if (nflag) 324 printf("%-*s ", width, cp); 325 else 326 printf("%-*.*s ", width, width, cp); 327 } 328 } 329 330 static void 331 p_flags(f, format) 332 register int f; 333 char *format; 334 { 335 char name[33], *flags; 336 register const struct bits *p = bits; 337 338 for (flags = name; p->b_mask; p++) 339 if (p->b_mask & f) 340 *flags++ = p->b_val; 341 *flags = '\0'; 342 printf(format, name); 343 } 344 345