| 1 | /* |
| 2 | * Copyright (c) 1983, 1988 Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms are permitted |
| 6 | * provided that the above copyright notice and this paragraph are |
| 7 | * duplicated in all such forms and that any documentation, |
| 8 | * advertising materials, and other materials related to such |
| 9 | * distribution and use acknowledge that the software was developed |
| 10 | * by the University of California, Berkeley. The name of the |
| 11 | * University may not be used to endorse or promote products derived |
| 12 | * from this software without specific prior written permission. |
| 13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| 14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| 15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 16 | */ |
| 17 | |
| 18 | #ifndef lint |
| 19 | static char sccsid[] = "@(#)route.c 5.14 (Berkeley) %G%"; |
| 20 | #endif /* not lint */ |
| 21 | |
| 22 | #include <stdio.h> |
| 23 | #include <strings.h> |
| 24 | |
| 25 | #include <sys/param.h> |
| 26 | #include <sys/socket.h> |
| 27 | #include <sys/mbuf.h> |
| 28 | |
| 29 | #include <net/if.h> |
| 30 | #include <net/route.h> |
| 31 | #include <netinet/in.h> |
| 32 | |
| 33 | #include <netns/ns.h> |
| 34 | |
| 35 | #include <netdb.h> |
| 36 | |
| 37 | extern int kmem; |
| 38 | extern int nflag; |
| 39 | extern char *routename(), *netname(), *ns_print(), *plural(); |
| 40 | extern char *malloc(); |
| 41 | |
| 42 | /* |
| 43 | * Definitions for showing gateway flags. |
| 44 | */ |
| 45 | struct bits { |
| 46 | short b_mask; |
| 47 | char b_val; |
| 48 | } bits[] = { |
| 49 | { RTF_UP, 'U' }, |
| 50 | { RTF_GATEWAY, 'G' }, |
| 51 | { RTF_HOST, 'H' }, |
| 52 | { RTF_DYNAMIC, 'D' }, |
| 53 | { RTF_MODIFIED, 'M' }, |
| 54 | { 0 } |
| 55 | }; |
| 56 | |
| 57 | /* |
| 58 | * Print routing tables. |
| 59 | */ |
| 60 | routepr(hostaddr, netaddr, hashsizeaddr) |
| 61 | off_t hostaddr, netaddr, hashsizeaddr; |
| 62 | { |
| 63 | struct mbuf mb; |
| 64 | register struct rtentry *rt; |
| 65 | register struct mbuf *m; |
| 66 | register struct bits *p; |
| 67 | char name[16], *flags; |
| 68 | struct mbuf **routehash; |
| 69 | struct ifnet ifnet; |
| 70 | int hashsize; |
| 71 | int i, doinghost = 1; |
| 72 | |
| 73 | if (hostaddr == 0) { |
| 74 | printf("rthost: symbol not in namelist\n"); |
| 75 | return; |
| 76 | } |
| 77 | if (netaddr == 0) { |
| 78 | printf("rtnet: symbol not in namelist\n"); |
| 79 | return; |
| 80 | } |
| 81 | if (hashsizeaddr == 0) { |
| 82 | printf("rthashsize: symbol not in namelist\n"); |
| 83 | return; |
| 84 | } |
| 85 | klseek(kmem, hashsizeaddr, 0); |
| 86 | read(kmem, (char *)&hashsize, sizeof (hashsize)); |
| 87 | routehash = (struct mbuf **)malloc( hashsize*sizeof (struct mbuf *) ); |
| 88 | klseek(kmem, hostaddr, 0); |
| 89 | read(kmem, (char *)routehash, hashsize*sizeof (struct mbuf *)); |
| 90 | printf("Routing tables\n"); |
| 91 | printf("%-16.16s %-18.18s %-6.6s %6.6s%8.8s %s\n", |
| 92 | "Destination", "Gateway", |
| 93 | "Flags", "Refs", "Use", "Interface"); |
| 94 | again: |
| 95 | for (i = 0; i < hashsize; i++) { |
| 96 | if (routehash[i] == 0) |
| 97 | continue; |
| 98 | m = routehash[i]; |
| 99 | while (m) { |
| 100 | struct sockaddr_in *sin; |
| 101 | |
| 102 | klseek(kmem, (off_t)m, 0); |
| 103 | read(kmem, (char *)&mb, sizeof (mb)); |
| 104 | rt = mtod(&mb, struct rtentry *); |
| 105 | if ((unsigned)rt < (unsigned)&mb || |
| 106 | (unsigned)rt >= (unsigned)(&mb + 1)) { |
| 107 | printf("???\n"); |
| 108 | return; |
| 109 | } |
| 110 | |
| 111 | switch(rt->rt_dst.sa_family) { |
| 112 | case AF_INET: |
| 113 | sin = (struct sockaddr_in *)&rt->rt_dst; |
| 114 | printf("%-16.16s ", |
| 115 | (sin->sin_addr.s_addr == 0) ? "default" : |
| 116 | (rt->rt_flags & RTF_HOST) ? |
| 117 | routename(sin->sin_addr) : |
| 118 | netname(sin->sin_addr, 0L)); |
| 119 | sin = (struct sockaddr_in *)&rt->rt_gateway; |
| 120 | printf("%-18.18s ", routename(sin->sin_addr)); |
| 121 | break; |
| 122 | case AF_NS: |
| 123 | printf("%-16s ", |
| 124 | ns_print((struct sockaddr_ns *)&rt->rt_dst)); |
| 125 | printf("%-18s ", |
| 126 | ns_print((struct sockaddr_ns *)&rt->rt_gateway)); |
| 127 | break; |
| 128 | default: |
| 129 | { |
| 130 | u_short *s = (u_short *)rt->rt_dst.sa_data; |
| 131 | printf("(%d)%x %x %x %x %x %x %x ", |
| 132 | rt->rt_dst.sa_family, |
| 133 | s[0], s[1], s[2], s[3], s[4], s[5], s[6]); |
| 134 | s = (u_short *)rt->rt_gateway.sa_data; |
| 135 | printf("(%d)%x %x %x %x %x %x %x ", |
| 136 | rt->rt_gateway.sa_family, |
| 137 | s[0], s[1], s[2], s[3], s[4], s[5], s[6]); |
| 138 | } |
| 139 | } |
| 140 | for (flags = name, p = bits; p->b_mask; p++) |
| 141 | if (p->b_mask & rt->rt_flags) |
| 142 | *flags++ = p->b_val; |
| 143 | *flags = '\0'; |
| 144 | printf("%-6.6s %6d %8d ", name, |
| 145 | rt->rt_refcnt, rt->rt_use); |
| 146 | if (rt->rt_ifp == 0) { |
| 147 | putchar('\n'); |
| 148 | m = mb.m_next; |
| 149 | continue; |
| 150 | } |
| 151 | klseek(kmem, (off_t)rt->rt_ifp, 0); |
| 152 | read(kmem, (char *)&ifnet, sizeof (ifnet)); |
| 153 | klseek(kmem, (off_t)ifnet.if_name, 0); |
| 154 | read(kmem, name, 16); |
| 155 | printf(" %.15s%d\n", name, ifnet.if_unit); |
| 156 | m = mb.m_next; |
| 157 | } |
| 158 | } |
| 159 | if (doinghost) { |
| 160 | klseek(kmem, netaddr, 0); |
| 161 | read(kmem, (char *)routehash, hashsize*sizeof (struct mbuf *)); |
| 162 | doinghost = 0; |
| 163 | goto again; |
| 164 | } |
| 165 | free((char *)routehash); |
| 166 | } |
| 167 | |
| 168 | char * |
| 169 | routename(in) |
| 170 | struct in_addr in; |
| 171 | { |
| 172 | register char *cp; |
| 173 | static char line[MAXHOSTNAMELEN + 1]; |
| 174 | struct hostent *hp; |
| 175 | static char domain[MAXHOSTNAMELEN + 1]; |
| 176 | static int first = 1; |
| 177 | char *index(); |
| 178 | |
| 179 | if (first) { |
| 180 | first = 0; |
| 181 | if (gethostname(domain, MAXHOSTNAMELEN) == 0 && |
| 182 | (cp = index(domain, '.'))) |
| 183 | (void) strcpy(domain, cp + 1); |
| 184 | else |
| 185 | domain[0] = 0; |
| 186 | } |
| 187 | cp = 0; |
| 188 | if (!nflag) { |
| 189 | hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), |
| 190 | AF_INET); |
| 191 | if (hp) { |
| 192 | if ((cp = index(hp->h_name, '.')) && |
| 193 | !strcmp(cp + 1, domain)) |
| 194 | *cp = 0; |
| 195 | cp = hp->h_name; |
| 196 | } |
| 197 | } |
| 198 | if (cp) |
| 199 | strncpy(line, cp, sizeof(line) - 1); |
| 200 | else { |
| 201 | #define C(x) ((x) & 0xff) |
| 202 | in.s_addr = ntohl(in.s_addr); |
| 203 | sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), |
| 204 | C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr)); |
| 205 | } |
| 206 | return (line); |
| 207 | } |
| 208 | |
| 209 | /* |
| 210 | * Return the name of the network whose address is given. |
| 211 | * The address is assumed to be that of a net or subnet, not a host. |
| 212 | */ |
| 213 | char * |
| 214 | netname(in, mask) |
| 215 | struct in_addr in; |
| 216 | u_long mask; |
| 217 | { |
| 218 | char *cp = 0; |
| 219 | static char line[MAXHOSTNAMELEN + 1]; |
| 220 | struct netent *np = 0; |
| 221 | u_long net; |
| 222 | register i; |
| 223 | int subnetshift; |
| 224 | |
| 225 | i = ntohl(in.s_addr); |
| 226 | if (!nflag && i) { |
| 227 | if (mask == 0) { |
| 228 | if (IN_CLASSA(i)) { |
| 229 | mask = IN_CLASSA_NET; |
| 230 | subnetshift = 8; |
| 231 | } else if (IN_CLASSB(i)) { |
| 232 | mask = IN_CLASSB_NET; |
| 233 | subnetshift = 8; |
| 234 | } else { |
| 235 | mask = IN_CLASSC_NET; |
| 236 | subnetshift = 4; |
| 237 | } |
| 238 | /* |
| 239 | * If there are more bits than the standard mask |
| 240 | * would suggest, subnets must be in use. |
| 241 | * Guess at the subnet mask, assuming reasonable |
| 242 | * width subnet fields. |
| 243 | */ |
| 244 | while (i &~ mask) |
| 245 | mask = (long)mask >> subnetshift; |
| 246 | } |
| 247 | net = i & mask; |
| 248 | while ((mask & 1) == 0) |
| 249 | mask >>= 1, net >>= 1; |
| 250 | np = getnetbyaddr(net, AF_INET); |
| 251 | if (np) |
| 252 | cp = np->n_name; |
| 253 | } |
| 254 | if (cp) |
| 255 | strncpy(line, cp, sizeof(line) - 1); |
| 256 | else if ((i & 0xffffff) == 0) |
| 257 | sprintf(line, "%u", C(i >> 24)); |
| 258 | else if ((i & 0xffff) == 0) |
| 259 | sprintf(line, "%u.%u", C(i >> 24) , C(i >> 16)); |
| 260 | else if ((i & 0xff) == 0) |
| 261 | sprintf(line, "%u.%u.%u", C(i >> 24), C(i >> 16), C(i >> 8)); |
| 262 | else |
| 263 | sprintf(line, "%u.%u.%u.%u", C(i >> 24), |
| 264 | C(i >> 16), C(i >> 8), C(i)); |
| 265 | return (line); |
| 266 | } |
| 267 | |
| 268 | /* |
| 269 | * Print routing statistics |
| 270 | */ |
| 271 | rt_stats(off) |
| 272 | off_t off; |
| 273 | { |
| 274 | struct rtstat rtstat; |
| 275 | |
| 276 | if (off == 0) { |
| 277 | printf("rtstat: symbol not in namelist\n"); |
| 278 | return; |
| 279 | } |
| 280 | klseek(kmem, off, 0); |
| 281 | read(kmem, (char *)&rtstat, sizeof (rtstat)); |
| 282 | printf("routing:\n"); |
| 283 | printf("\t%u bad routing redirect%s\n", |
| 284 | rtstat.rts_badredirect, plural(rtstat.rts_badredirect)); |
| 285 | printf("\t%u dynamically created route%s\n", |
| 286 | rtstat.rts_dynamic, plural(rtstat.rts_dynamic)); |
| 287 | printf("\t%u new gateway%s due to redirects\n", |
| 288 | rtstat.rts_newgateway, plural(rtstat.rts_newgateway)); |
| 289 | printf("\t%u destination%s found unreachable\n", |
| 290 | rtstat.rts_unreach, plural(rtstat.rts_unreach)); |
| 291 | printf("\t%u use%s of a wildcard route\n", |
| 292 | rtstat.rts_wildcard, plural(rtstat.rts_wildcard)); |
| 293 | } |
| 294 | short ns_nullh[] = {0,0,0}; |
| 295 | short ns_bh[] = {-1,-1,-1}; |
| 296 | |
| 297 | char * |
| 298 | ns_print(sns) |
| 299 | struct sockaddr_ns *sns; |
| 300 | { |
| 301 | struct ns_addr work; |
| 302 | union { union ns_net net_e; u_long long_e; } net; |
| 303 | u_short port; |
| 304 | static char mybuf[50], cport[10], chost[25]; |
| 305 | char *host = ""; |
| 306 | register char *p; register u_char *q; |
| 307 | |
| 308 | work = sns->sns_addr; |
| 309 | port = ntohs(work.x_port); |
| 310 | work.x_port = 0; |
| 311 | net.net_e = work.x_net; |
| 312 | if (ns_nullhost(work) && net.long_e == 0) { |
| 313 | if (port ) { |
| 314 | sprintf(mybuf, "*.%xH", port); |
| 315 | upHex(mybuf); |
| 316 | } else |
| 317 | sprintf(mybuf, "*.*"); |
| 318 | return (mybuf); |
| 319 | } |
| 320 | |
| 321 | if (bcmp(ns_bh, work.x_host.c_host, 6) == 0) { |
| 322 | host = "any"; |
| 323 | } else if (bcmp(ns_nullh, work.x_host.c_host, 6) == 0) { |
| 324 | host = "*"; |
| 325 | } else { |
| 326 | q = work.x_host.c_host; |
| 327 | sprintf(chost, "%02x%02x%02x%02x%02x%02xH", |
| 328 | q[0], q[1], q[2], q[3], q[4], q[5]); |
| 329 | for (p = chost; *p == '0' && p < chost + 12; p++); |
| 330 | host = p; |
| 331 | } |
| 332 | if (port) |
| 333 | sprintf(cport, ".%xH", htons(port)); |
| 334 | else |
| 335 | *cport = 0; |
| 336 | |
| 337 | sprintf(mybuf,"%xH.%s%s", ntohl(net.long_e), host, cport); |
| 338 | upHex(mybuf); |
| 339 | return(mybuf); |
| 340 | } |
| 341 | |
| 342 | char * |
| 343 | ns_phost(sns) |
| 344 | struct sockaddr_ns *sns; |
| 345 | { |
| 346 | struct sockaddr_ns work; |
| 347 | static union ns_net ns_zeronet; |
| 348 | char *p; |
| 349 | |
| 350 | work = *sns; |
| 351 | work.sns_addr.x_port = 0; |
| 352 | work.sns_addr.x_net = ns_zeronet; |
| 353 | |
| 354 | p = ns_print(&work); |
| 355 | if (strncmp("0H.", p, 3) == 0) p += 3; |
| 356 | return(p); |
| 357 | } |
| 358 | upHex(p0) |
| 359 | char *p0; |
| 360 | { |
| 361 | register char *p = p0; |
| 362 | for (; *p; p++) switch (*p) { |
| 363 | |
| 364 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': |
| 365 | *p += ('A' - 'a'); |
| 366 | } |
| 367 | } |