| 1 | /* |
| 2 | * Copyright (c) 1983, 1989 The Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * %sccs.include.redist.c% |
| 6 | */ |
| 7 | |
| 8 | #ifndef lint |
| 9 | char copyright[] = |
| 10 | "@(#) Copyright (c) 1983 The Regents of the University of California.\n\ |
| 11 | All rights reserved.\n"; |
| 12 | #endif /* not lint */ |
| 13 | |
| 14 | #ifndef lint |
| 15 | static char sccsid[] = "@(#)route.c 5.28 (Berkeley) %G%"; |
| 16 | #endif /* not lint */ |
| 17 | |
| 18 | #include <sys/param.h> |
| 19 | #include <sys/socket.h> |
| 20 | #include <sys/ioctl.h> |
| 21 | #include <sys/file.h> |
| 22 | #include <sys/mbuf.h> |
| 23 | #include <sys/kinfo.h> |
| 24 | |
| 25 | #include <net/route.h> |
| 26 | #include <net/if_dl.h> |
| 27 | #include <netinet/in.h> |
| 28 | #include <netns/ns.h> |
| 29 | #include <netiso/iso.h> |
| 30 | |
| 31 | #include <netdb.h> |
| 32 | #include <stdio.h> |
| 33 | #include <errno.h> |
| 34 | #include <ctype.h> |
| 35 | #include <paths.h> |
| 36 | |
| 37 | struct keytab { |
| 38 | char *kt_cp; |
| 39 | int kt_i; |
| 40 | } keywords[] = { |
| 41 | #include "keywords.h" |
| 42 | {0, 0} |
| 43 | }; |
| 44 | |
| 45 | struct ortentry route; |
| 46 | union sockunion { |
| 47 | struct sockaddr sa; |
| 48 | struct sockaddr_in sin; |
| 49 | struct sockaddr_ns sns; |
| 50 | struct sockaddr_iso siso; |
| 51 | struct sockaddr_dl sdl; |
| 52 | } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp, *so_addrs[] = |
| 53 | { &so_dst, &so_gate, &so_mask, &so_genmask, &so_ifa, &so_ifp, 0}; |
| 54 | typedef union sockunion *sup; |
| 55 | int pid, rtm_addrs; |
| 56 | int s; |
| 57 | int forcehost, forcenet, doflush, nflag, af, qflag, Cflag, keyword(); |
| 58 | int iflag, verbose, aflen = sizeof (struct sockaddr_in); |
| 59 | int locking, lockrest, debugonly; |
| 60 | struct sockaddr_in sin = { sizeof(sin), AF_INET }; |
| 61 | struct rt_metrics rt_metrics; |
| 62 | u_long rtm_inits; |
| 63 | struct in_addr inet_makeaddr(); |
| 64 | char *malloc(), *routename(), *netname(); |
| 65 | extern char *iso_ntoa(), *link_ntoa(); |
| 66 | #define kget(p, d) \ |
| 67 | (lseek(kmem, (off_t)(p), 0), read(kmem, (char *)&(d), sizeof (d))) |
| 68 | |
| 69 | usage(cp) |
| 70 | char *cp; |
| 71 | { |
| 72 | fprintf(stderr, |
| 73 | "usage: route [ -nqCv ] cmd [[ -<qualifers> ] args ]\n"); |
| 74 | if (cp) fprintf(stderr, "(botched keyword: %s)\n", cp); |
| 75 | |
| 76 | exit(1); |
| 77 | } |
| 78 | |
| 79 | main(argc, argv) |
| 80 | int argc; |
| 81 | char *argv[]; |
| 82 | { |
| 83 | |
| 84 | char *argvp; |
| 85 | if (argc < 2) |
| 86 | usage((char *)0); |
| 87 | argc--, argv++; |
| 88 | for (; argc > 0 && argv[0][0] == '-'; argc--, argv++) { |
| 89 | for (argvp = argv[0]++; *argvp; argvp++) |
| 90 | switch (*argv[0]) { |
| 91 | case 'n': |
| 92 | nflag++; |
| 93 | break; |
| 94 | case 'q': |
| 95 | qflag++; |
| 96 | break; |
| 97 | case 'C': |
| 98 | Cflag++; /* Use old ioctls */ |
| 99 | break; |
| 100 | case 'v': |
| 101 | verbose++; |
| 102 | } |
| 103 | } |
| 104 | pid = getpid(); |
| 105 | if (Cflag) |
| 106 | s = socket(AF_INET, SOCK_RAW, 0); |
| 107 | else |
| 108 | s = socket(PF_ROUTE, SOCK_RAW, 0); |
| 109 | if (s < 0) { |
| 110 | perror("route: socket"); |
| 111 | exit(1); |
| 112 | } |
| 113 | if (argc > 0) switch (keyword(*argv)) { |
| 114 | case K_ADD: |
| 115 | case K_CHANGE: |
| 116 | case K_DELETE: |
| 117 | newroute(argc, argv); |
| 118 | case K_MONITOR: |
| 119 | monitor(); |
| 120 | case K_FLUSH: |
| 121 | flushroutes(argc, argv); |
| 122 | } |
| 123 | usage(*argv); |
| 124 | } |
| 125 | |
| 126 | /* |
| 127 | * Purge all entries in the routing tables not |
| 128 | * associated with network interfaces. |
| 129 | */ |
| 130 | flushroutes(argc, argv) |
| 131 | char *argv[]; |
| 132 | { |
| 133 | int bufsize, needed, seqno, rlen; |
| 134 | char *buf, *next, *lim; |
| 135 | register struct rt_msghdr *rtm; |
| 136 | |
| 137 | shutdown(s, 0); /* Don't want to read back our messages */ |
| 138 | if (argc > 1) { |
| 139 | argv++; |
| 140 | if (argc == 2 && **argv == '-') switch (keyword(1 + *argv)) { |
| 141 | case K_INET: af = AF_INET; break; |
| 142 | case K_XNS: af = AF_NS; break; |
| 143 | case K_LINK: af = AF_LINK; break; |
| 144 | case K_ISO: case K_OSI: af = AF_ISO; break; |
| 145 | default: goto bad; |
| 146 | } else |
| 147 | bad: usage(*argv); |
| 148 | } |
| 149 | if ((needed = getkerninfo(KINFO_RT_DUMP, 0, 0, 0)) < 0) |
| 150 | { perror("route-getkerninfo-estimate"); exit(1);} |
| 151 | if ((buf = malloc(needed)) == 0) |
| 152 | { printf("out of space\n");; exit(1);} |
| 153 | if ((rlen = getkerninfo(KINFO_RT_DUMP, buf, &needed, 0)) < 0) |
| 154 | { perror("actual retrieval of routing table"); exit(1);} |
| 155 | lim = buf + rlen; |
| 156 | for (next = buf; next < lim; next += rtm->rtm_msglen) { |
| 157 | rtm = (struct rt_msghdr *)next; |
| 158 | if ((rtm->rtm_flags & RTF_GATEWAY) == 0) |
| 159 | continue; |
| 160 | if (af) { |
| 161 | struct sockaddr *sa = (struct sockaddr *)(rtm + 1); |
| 162 | if (sa->sa_family != af) |
| 163 | continue; |
| 164 | } |
| 165 | rtm->rtm_type = RTM_DELETE; |
| 166 | rtm->rtm_seq = seqno; |
| 167 | if ((rlen = write(s, next, rtm->rtm_msglen)) < 0) { |
| 168 | perror("writing to routing socket"); |
| 169 | printf("got only %d for rlen\n", rlen); |
| 170 | break; |
| 171 | } |
| 172 | seqno++; |
| 173 | if (qflag) |
| 174 | continue; |
| 175 | if (verbose) { |
| 176 | print_rtmsg(rtm, rlen); |
| 177 | } else { |
| 178 | struct sockaddr *sa = (struct sockaddr *)(rtm + 1); |
| 179 | printf("%-20.20s ", (rtm->rtm_flags & RTF_HOST) ? |
| 180 | routename(sa) : netname(sa)); |
| 181 | sa = (struct sockaddr *)(sa->sa_len + (char *)sa); |
| 182 | printf("%-20.20s ", routename(sa)); |
| 183 | printf("done\n"); |
| 184 | } |
| 185 | } |
| 186 | exit(0); |
| 187 | } |
| 188 | |
| 189 | char * |
| 190 | routename(sa) |
| 191 | struct sockaddr *sa; |
| 192 | { |
| 193 | register char *cp; |
| 194 | static char line[50]; |
| 195 | struct hostent *hp; |
| 196 | static char domain[MAXHOSTNAMELEN + 1]; |
| 197 | static int first = 1; |
| 198 | char *index(); |
| 199 | char *ns_print(); |
| 200 | |
| 201 | if (first) { |
| 202 | first = 0; |
| 203 | if (gethostname(domain, MAXHOSTNAMELEN) == 0 && |
| 204 | (cp = index(domain, '.'))) |
| 205 | (void) strcpy(domain, cp + 1); |
| 206 | else |
| 207 | domain[0] = 0; |
| 208 | } |
| 209 | switch (sa->sa_family) { |
| 210 | |
| 211 | case AF_INET: |
| 212 | { struct in_addr in; |
| 213 | in = ((struct sockaddr_in *)sa)->sin_addr; |
| 214 | |
| 215 | cp = 0; |
| 216 | if (in.s_addr == INADDR_ANY) |
| 217 | cp = "default"; |
| 218 | if (cp == 0 && !nflag) { |
| 219 | hp = gethostbyaddr(&in, sizeof (struct in_addr), |
| 220 | AF_INET); |
| 221 | if (hp) { |
| 222 | if ((cp = index(hp->h_name, '.')) && |
| 223 | !strcmp(cp + 1, domain)) |
| 224 | *cp = 0; |
| 225 | cp = hp->h_name; |
| 226 | } |
| 227 | } |
| 228 | if (cp) |
| 229 | strcpy(line, cp); |
| 230 | else { |
| 231 | #define C(x) ((x) & 0xff) |
| 232 | in.s_addr = ntohl(in.s_addr); |
| 233 | (void)sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), |
| 234 | C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr)); |
| 235 | } |
| 236 | break; |
| 237 | } |
| 238 | |
| 239 | case AF_NS: |
| 240 | return (ns_print((struct sockaddr_ns *)sa)); |
| 241 | |
| 242 | case AF_LINK: |
| 243 | return (link_ntoa((struct sockaddr_dl *)sa)); |
| 244 | |
| 245 | case AF_ISO: |
| 246 | (void) sprintf(line, "iso %s", |
| 247 | iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); |
| 248 | break; |
| 249 | |
| 250 | default: |
| 251 | { u_short *s = (u_short *)sa->sa_data; |
| 252 | u_short *slim = s + ((sa->sa_len + 1)>>1); |
| 253 | char *cp = line + sprintf(line, "(%d)", sa->sa_family); |
| 254 | int n; |
| 255 | |
| 256 | while (s < slim) { |
| 257 | n = sprintf(cp, " %x", *s); |
| 258 | s++; cp += n; |
| 259 | } |
| 260 | break; |
| 261 | } |
| 262 | } |
| 263 | return (line); |
| 264 | } |
| 265 | |
| 266 | /* |
| 267 | * Return the name of the network whose address is given. |
| 268 | * The address is assumed to be that of a net or subnet, not a host. |
| 269 | */ |
| 270 | char * |
| 271 | netname(sa) |
| 272 | struct sockaddr *sa; |
| 273 | { |
| 274 | char *cp = 0; |
| 275 | static char line[50]; |
| 276 | struct netent *np = 0; |
| 277 | u_long net, mask; |
| 278 | register u_long i; |
| 279 | int subnetshift; |
| 280 | char *ns_print(); |
| 281 | |
| 282 | switch (sa->sa_family) { |
| 283 | |
| 284 | case AF_INET: |
| 285 | { struct in_addr in; |
| 286 | in = ((struct sockaddr_in *)sa)->sin_addr; |
| 287 | |
| 288 | i = in.s_addr = ntohl(in.s_addr); |
| 289 | if (in.s_addr == 0) |
| 290 | cp = "default"; |
| 291 | else if (!nflag) { |
| 292 | if (IN_CLASSA(i)) { |
| 293 | mask = IN_CLASSA_NET; |
| 294 | subnetshift = 8; |
| 295 | } else if (IN_CLASSB(i)) { |
| 296 | mask = IN_CLASSB_NET; |
| 297 | subnetshift = 8; |
| 298 | } else { |
| 299 | mask = IN_CLASSC_NET; |
| 300 | subnetshift = 4; |
| 301 | } |
| 302 | /* |
| 303 | * If there are more bits than the standard mask |
| 304 | * would suggest, subnets must be in use. |
| 305 | * Guess at the subnet mask, assuming reasonable |
| 306 | * width subnet fields. |
| 307 | */ |
| 308 | while (in.s_addr &~ mask) |
| 309 | mask = (long)mask >> subnetshift; |
| 310 | net = in.s_addr & mask; |
| 311 | while ((mask & 1) == 0) |
| 312 | mask >>= 1, net >>= 1; |
| 313 | np = getnetbyaddr(net, AF_INET); |
| 314 | if (np) |
| 315 | cp = np->n_name; |
| 316 | } |
| 317 | if (cp) |
| 318 | strcpy(line, cp); |
| 319 | else if ((in.s_addr & 0xffffff) == 0) |
| 320 | (void)sprintf(line, "%u", C(in.s_addr >> 24)); |
| 321 | else if ((in.s_addr & 0xffff) == 0) |
| 322 | (void)sprintf(line, "%u.%u", C(in.s_addr >> 24), |
| 323 | C(in.s_addr >> 16)); |
| 324 | else if ((in.s_addr & 0xff) == 0) |
| 325 | (void)sprintf(line, "%u.%u.%u", C(in.s_addr >> 24), |
| 326 | C(in.s_addr >> 16), C(in.s_addr >> 8)); |
| 327 | else |
| 328 | (void)sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24), |
| 329 | C(in.s_addr >> 16), C(in.s_addr >> 8), |
| 330 | C(in.s_addr)); |
| 331 | break; |
| 332 | } |
| 333 | |
| 334 | case AF_NS: |
| 335 | return (ns_print((struct sockaddr_ns *)sa)); |
| 336 | break; |
| 337 | |
| 338 | case AF_LINK: |
| 339 | return (link_ntoa((struct sockaddr_dl *)sa)); |
| 340 | |
| 341 | case AF_ISO: |
| 342 | (void) sprintf(line, "iso %s", |
| 343 | iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); |
| 344 | break; |
| 345 | |
| 346 | default: |
| 347 | { u_short *s = (u_short *)sa->sa_data; |
| 348 | u_short *slim = s + ((sa->sa_len + 1)>>1); |
| 349 | char *cp = line + sprintf(line, "af %d:", sa->sa_family); |
| 350 | int n; |
| 351 | |
| 352 | while (s < slim) { |
| 353 | n = sprintf(cp, " %x", *s); |
| 354 | s++; cp += n; |
| 355 | } |
| 356 | break; |
| 357 | } |
| 358 | } |
| 359 | return (line); |
| 360 | } |
| 361 | |
| 362 | set_metric(value, key) |
| 363 | char *value; |
| 364 | { |
| 365 | int flag = 0; |
| 366 | u_long noval, *valp = &noval; |
| 367 | |
| 368 | switch (key) { |
| 369 | #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break |
| 370 | caseof(K_MTU, RTV_MTU, rmx_mtu); |
| 371 | caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); |
| 372 | caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); |
| 373 | caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); |
| 374 | caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); |
| 375 | caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); |
| 376 | caseof(K_RTT, RTV_RTT, rmx_rtt); |
| 377 | caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); |
| 378 | } |
| 379 | rtm_inits |= flag; |
| 380 | if (lockrest || locking) |
| 381 | rt_metrics.rmx_locks |= flag; |
| 382 | if (locking) |
| 383 | locking = 0; |
| 384 | *valp = atoi(value); |
| 385 | } |
| 386 | |
| 387 | newroute(argc, argv) |
| 388 | int argc; |
| 389 | register char **argv; |
| 390 | { |
| 391 | struct sockaddr_in *sin; |
| 392 | char *cmd, *dest, *gateway, *mask; |
| 393 | int ishost, metric = 0, ret, attempts, oerrno, flags = 0, next; |
| 394 | int key; |
| 395 | struct hostent *hp = 0; |
| 396 | extern int errno; |
| 397 | |
| 398 | shutdown(s, 0); /* Don't want to read back our messages */ |
| 399 | cmd = argv[0]; |
| 400 | while (--argc > 0) { |
| 401 | if (**(++argv)== '-') { |
| 402 | switch(key = keyword(1 + *argv)) { |
| 403 | case K_LINK: |
| 404 | af = AF_LINK; |
| 405 | aflen = sizeof(struct sockaddr_dl); |
| 406 | break; |
| 407 | case K_OSI: |
| 408 | case K_ISO: |
| 409 | af = AF_ISO; |
| 410 | aflen = sizeof(struct sockaddr_iso); |
| 411 | break; |
| 412 | case K_INET: |
| 413 | af = AF_INET; |
| 414 | aflen = sizeof(struct sockaddr_in); |
| 415 | break; |
| 416 | case K_XNS: |
| 417 | af = AF_NS; |
| 418 | aflen = sizeof(struct sockaddr_ns); |
| 419 | break; |
| 420 | case K_IFACE: |
| 421 | case K_INTERFACE: |
| 422 | iflag++; |
| 423 | break; |
| 424 | case K_LOCK: |
| 425 | locking = 1; |
| 426 | break; |
| 427 | case K_LOCKREST: |
| 428 | lockrest = 1; |
| 429 | break; |
| 430 | case K_HOST: |
| 431 | forcehost++; |
| 432 | break; |
| 433 | case K_NETMASK: |
| 434 | argc--; |
| 435 | (void) getaddr(RTA_NETMASK, *++argv, 0); |
| 436 | /* FALLTHROUGH */ |
| 437 | case K_NET: |
| 438 | forcenet++; |
| 439 | break; |
| 440 | case K_REJECT: |
| 441 | flags |= RTF_REJECT; |
| 442 | break; |
| 443 | case K_CLONING: |
| 444 | flags |= RTF_CLONING; |
| 445 | break; |
| 446 | case K_XRESOLVE: |
| 447 | flags |= RTF_XRESOLVE; |
| 448 | break; |
| 449 | case K_GENMASK: |
| 450 | argc--; |
| 451 | (void) getaddr(RTA_GENMASK, *++argv, 0); |
| 452 | break; |
| 453 | case K_MTU: |
| 454 | case K_HOPCOUNT: |
| 455 | case K_EXPIRE: |
| 456 | case K_RECVPIPE: |
| 457 | case K_SENDPIPE: |
| 458 | case K_SSTHRESH: |
| 459 | case K_RTT: |
| 460 | case K_RTTVAR: |
| 461 | argc--; |
| 462 | set_metric(*++argv, key); |
| 463 | break; |
| 464 | default: |
| 465 | usage(1+*argv); |
| 466 | } |
| 467 | } else { |
| 468 | if ((rtm_addrs & RTA_DST) == 0) { |
| 469 | dest = *argv; |
| 470 | ishost = getaddr(RTA_DST, *argv, &hp); |
| 471 | } else if ((rtm_addrs & RTA_GATEWAY) == 0) { |
| 472 | gateway = *argv; |
| 473 | (void) getaddr(RTA_GATEWAY, *argv, &hp); |
| 474 | } else { |
| 475 | int ret = atoi(*argv); |
| 476 | if (ret == 0) { |
| 477 | printf("%s,%s", "old usage of trailing 0", |
| 478 | "assuming route to if\n"); |
| 479 | iflag = 1; |
| 480 | continue; |
| 481 | } else if (ret > 0 && ret < 10) { |
| 482 | printf("old usage of trailing digit, "); |
| 483 | printf("assuming route via gateway\n"); |
| 484 | iflag = 0; |
| 485 | continue; |
| 486 | } |
| 487 | (void) getaddr(RTA_NETMASK, *argv, 0); |
| 488 | } |
| 489 | } |
| 490 | } |
| 491 | if (forcehost) |
| 492 | ishost = 1; |
| 493 | if (forcenet) |
| 494 | ishost = 0; |
| 495 | flags |= RTF_UP; |
| 496 | if (ishost) |
| 497 | flags |= RTF_HOST; |
| 498 | if (iflag == 0) |
| 499 | flags |= RTF_GATEWAY; |
| 500 | for (attempts = 1; ; attempts++) { |
| 501 | errno = 0; |
| 502 | if (Cflag && (af == AF_INET || af == AF_NS)) { |
| 503 | route.rt_flags = flags; |
| 504 | route.rt_dst = so_dst.sa; |
| 505 | route.rt_gateway = so_gate.sa; |
| 506 | if ((ret = ioctl(s, *cmd == 'a' ? SIOCADDRT : SIOCDELRT, |
| 507 | (caddr_t)&route)) == 0) |
| 508 | break; |
| 509 | } else { |
| 510 | if ((ret = rtmsg(*cmd, flags)) == 0); |
| 511 | break; |
| 512 | } |
| 513 | if (errno != ENETUNREACH && errno != ESRCH) |
| 514 | break; |
| 515 | if (hp && hp->h_addr_list[1]) { |
| 516 | hp->h_addr_list++; |
| 517 | bcopy(hp->h_addr_list[0], (caddr_t)&so_dst.sin.sin_addr, |
| 518 | hp->h_length); |
| 519 | } else |
| 520 | break; |
| 521 | } |
| 522 | oerrno = errno; |
| 523 | printf("%s %s %s: gateway %s", cmd, ishost? "host" : "net", |
| 524 | dest, gateway); |
| 525 | if (attempts > 1 && ret == 0) |
| 526 | printf(" (%s)", |
| 527 | inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr)); |
| 528 | if (ret == 0) |
| 529 | printf("\n"); |
| 530 | else { |
| 531 | printf(": "); |
| 532 | fflush(stdout); |
| 533 | errno = oerrno; |
| 534 | error(""); |
| 535 | } |
| 536 | exit(0); |
| 537 | } |
| 538 | |
| 539 | error(cmd) |
| 540 | char *cmd; |
| 541 | { |
| 542 | extern int errno; |
| 543 | |
| 544 | switch(errno) { |
| 545 | case ESRCH: |
| 546 | printf("not in table\n"); |
| 547 | break; |
| 548 | case EBUSY: |
| 549 | printf("entry in use\n"); |
| 550 | break; |
| 551 | case ENOBUFS: |
| 552 | printf("routing table overflow\n"); |
| 553 | break; |
| 554 | default: |
| 555 | printf("ioctl returns %d\n", errno); |
| 556 | perror(cmd); |
| 557 | } |
| 558 | fflush(stdout); |
| 559 | errno = 0; |
| 560 | } |
| 561 | |
| 562 | char * |
| 563 | savestr(s) |
| 564 | char *s; |
| 565 | { |
| 566 | char *sav; |
| 567 | |
| 568 | sav = malloc(strlen(s) + 1); |
| 569 | if (sav == NULL) { |
| 570 | fprintf("route: out of memory\n"); |
| 571 | exit(1); |
| 572 | } |
| 573 | strcpy(sav, s); |
| 574 | return (sav); |
| 575 | } |
| 576 | |
| 577 | inet_makenetandmask(net, sin) |
| 578 | u_long net; |
| 579 | register struct sockaddr_in *sin; |
| 580 | { |
| 581 | u_long addr; |
| 582 | u_long mask = 0; |
| 583 | register char *cp; |
| 584 | |
| 585 | rtm_addrs |= RTA_NETMASK; |
| 586 | if (net == 0) |
| 587 | mask = addr = 0; |
| 588 | else if (net < 128) { |
| 589 | addr = net << IN_CLASSA_NSHIFT; |
| 590 | mask = IN_CLASSA_NET; |
| 591 | } else if (net < 65536) { |
| 592 | addr = net << IN_CLASSB_NSHIFT; |
| 593 | mask = IN_CLASSB_NET; |
| 594 | } else if (net < 16777216L) { |
| 595 | addr = net << IN_CLASSC_NSHIFT; |
| 596 | mask = IN_CLASSC_NET; |
| 597 | } else { |
| 598 | addr = net; |
| 599 | if ((addr & IN_CLASSA_HOST) == 0) |
| 600 | mask = IN_CLASSA_NET; |
| 601 | else if ((addr & IN_CLASSB_HOST) == 0) |
| 602 | mask = IN_CLASSB_NET; |
| 603 | else if ((addr & IN_CLASSC_HOST) == 0) |
| 604 | mask = IN_CLASSC_NET; |
| 605 | else |
| 606 | mask = -1; |
| 607 | } |
| 608 | sin->sin_addr.s_addr = htonl(addr); |
| 609 | sin = &so_mask.sin; |
| 610 | sin->sin_addr.s_addr = htonl(mask); |
| 611 | sin->sin_len = 0; |
| 612 | sin->sin_family = 0; |
| 613 | cp = (char *)(1 + &(sin->sin_addr)); |
| 614 | while (*--cp == 0 && cp > (char *)sin) |
| 615 | ; |
| 616 | sin->sin_len = 1 + cp - (char *)sin; |
| 617 | } |
| 618 | |
| 619 | /* |
| 620 | * Interpret an argument as a network address of some kind, |
| 621 | * returning 1 if a host address, 0 if a network address. |
| 622 | */ |
| 623 | getaddr(which, s, hpp) |
| 624 | char *s; |
| 625 | struct hostent **hpp; |
| 626 | { |
| 627 | register union sockunion *su; |
| 628 | struct ns_addr ns_addr(); |
| 629 | struct iso_addr *iso_addr(); |
| 630 | struct hostent *hp; |
| 631 | struct netent *np; |
| 632 | u_long val; |
| 633 | |
| 634 | if (af == 0) { |
| 635 | af = AF_INET; |
| 636 | aflen = sizeof(struct sockaddr_in); |
| 637 | } |
| 638 | rtm_addrs |= which; |
| 639 | switch (which) { |
| 640 | case RTA_DST: su = so_addrs[0]; su->sa.sa_family = af; break; |
| 641 | case RTA_GATEWAY: su = so_addrs[1]; su->sa.sa_family = af; break; |
| 642 | case RTA_NETMASK: su = so_addrs[2]; break; |
| 643 | case RTA_GENMASK: su = so_addrs[3]; break; |
| 644 | default: usage("Internal Error"); /*NOTREACHED*/ |
| 645 | } |
| 646 | su->sa.sa_len = aflen; |
| 647 | if (strcmp(s, "default") == 0) { |
| 648 | switch (which) { |
| 649 | case RTA_DST: |
| 650 | forcenet++; |
| 651 | getaddr(RTA_NETMASK, s, 0); |
| 652 | break; |
| 653 | case RTA_NETMASK: |
| 654 | case RTA_GENMASK: |
| 655 | su->sa.sa_len = 0; |
| 656 | } |
| 657 | return 0; |
| 658 | } |
| 659 | if (af == AF_NS) |
| 660 | goto do_xns; |
| 661 | if (af == AF_OSI) |
| 662 | goto do_osi; |
| 663 | if (af == AF_LINK) |
| 664 | goto do_link; |
| 665 | if (hpp == 0) hpp = &hp; |
| 666 | *hpp = 0; |
| 667 | if (((val = inet_addr(s)) != -1) && |
| 668 | (which != RTA_DST || forcenet == 0)) { |
| 669 | su->sin.sin_addr.s_addr = val; |
| 670 | if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) |
| 671 | return (1); |
| 672 | else { |
| 673 | val = ntohl(val); |
| 674 | out: if (which == RTA_DST) |
| 675 | inet_makenetandmask(val, &su->sin); |
| 676 | return (0); |
| 677 | } |
| 678 | } |
| 679 | val = inet_network(s); |
| 680 | if (val != -1) { |
| 681 | goto out; |
| 682 | } |
| 683 | np = getnetbyname(s); |
| 684 | if (np) { |
| 685 | val = np->n_net; |
| 686 | goto out; |
| 687 | } |
| 688 | hp = gethostbyname(s); |
| 689 | if (hp) { |
| 690 | *hpp = hp; |
| 691 | su->sin.sin_family = hp->h_addrtype; |
| 692 | bcopy(hp->h_addr, &su->sin.sin_addr, hp->h_length); |
| 693 | return (1); |
| 694 | } |
| 695 | fprintf(stderr, "%s: bad value\n", s); |
| 696 | exit(1); |
| 697 | do_xns: |
| 698 | if (val == 0) |
| 699 | return(0); |
| 700 | if (which == RTA_DST) { |
| 701 | extern short ns_bh[3]; |
| 702 | struct sockaddr_ns *sms = &(so_mask.sns); |
| 703 | bzero((char *)sms, sizeof(*sms)); |
| 704 | sms->sns_family = 0; |
| 705 | sms->sns_len = 6; |
| 706 | sms->sns_addr.x_net = *(union ns_net *)ns_bh; |
| 707 | rtm_addrs |= RTA_NETMASK; |
| 708 | } |
| 709 | su->sns.sns_addr = ns_addr(s); |
| 710 | return (!ns_nullhost(su->sns.sns_addr)); |
| 711 | do_osi: |
| 712 | su->siso.siso_addr = *iso_addr(s); |
| 713 | if (which == RTA_NETMASK || which == RTA_GENMASK) { |
| 714 | register char *cp = (char *)TSEL(&su->siso); |
| 715 | su->siso.siso_nlen = 0; |
| 716 | do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); |
| 717 | su->siso.siso_len = 1 + cp - (char *)su; |
| 718 | } |
| 719 | return (1); |
| 720 | do_link: |
| 721 | link_addr(s, &su->sdl); |
| 722 | return (1); |
| 723 | } |
| 724 | |
| 725 | short ns_nullh[] = {0,0,0}; |
| 726 | short ns_bh[] = {-1,-1,-1}; |
| 727 | |
| 728 | char * |
| 729 | ns_print(sns) |
| 730 | struct sockaddr_ns *sns; |
| 731 | { |
| 732 | struct ns_addr work; |
| 733 | union { union ns_net net_e; u_long long_e; } net; |
| 734 | u_short port; |
| 735 | static char mybuf[50], cport[10], chost[25]; |
| 736 | char *host = ""; |
| 737 | register char *p; register u_char *q; u_char *q_lim; |
| 738 | |
| 739 | work = sns->sns_addr; |
| 740 | port = ntohs(work.x_port); |
| 741 | work.x_port = 0; |
| 742 | net.net_e = work.x_net; |
| 743 | if (ns_nullhost(work) && net.long_e == 0) { |
| 744 | if (port ) { |
| 745 | (void)sprintf(mybuf, "*.%xH", port); |
| 746 | upHex(mybuf); |
| 747 | } else |
| 748 | (void)sprintf(mybuf, "*.*"); |
| 749 | return (mybuf); |
| 750 | } |
| 751 | |
| 752 | if (bcmp(ns_bh, work.x_host.c_host, 6) == 0) { |
| 753 | host = "any"; |
| 754 | } else if (bcmp(ns_nullh, work.x_host.c_host, 6) == 0) { |
| 755 | host = "*"; |
| 756 | } else { |
| 757 | q = work.x_host.c_host; |
| 758 | (void)sprintf(chost, "%02x%02x%02x%02x%02x%02xH", |
| 759 | q[0], q[1], q[2], q[3], q[4], q[5]); |
| 760 | for (p = chost; *p == '0' && p < chost + 12; p++); |
| 761 | host = p; |
| 762 | } |
| 763 | if (port) |
| 764 | (void)sprintf(cport, ".%xH", htons(port)); |
| 765 | else |
| 766 | *cport = 0; |
| 767 | |
| 768 | (void)sprintf(mybuf,"%xH.%s%s", ntohl(net.long_e), host, cport); |
| 769 | upHex(mybuf); |
| 770 | return(mybuf); |
| 771 | } |
| 772 | |
| 773 | upHex(p0) |
| 774 | char *p0; |
| 775 | { |
| 776 | register char *p = p0; |
| 777 | for (; *p; p++) switch (*p) { |
| 778 | |
| 779 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': |
| 780 | *p += ('A' - 'a'); |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | monitor() |
| 785 | { |
| 786 | int n; |
| 787 | char msg[2048]; |
| 788 | verbose = 1; |
| 789 | for(;;) { |
| 790 | n = read(s, msg, 2048); |
| 791 | printf("got message of size %d\n", n); |
| 792 | print_rtmsg((struct rt_msghdr *)msg); |
| 793 | } |
| 794 | } |
| 795 | |
| 796 | struct { |
| 797 | struct rt_msghdr m_rtm; |
| 798 | char m_space[512]; |
| 799 | } m_rtmsg; |
| 800 | |
| 801 | rtmsg(cmd, flags) |
| 802 | { |
| 803 | static int seq; |
| 804 | int rlen; |
| 805 | extern int errno; |
| 806 | register char *cp = m_rtmsg.m_space; |
| 807 | register int l; |
| 808 | |
| 809 | errno = 0; |
| 810 | bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); |
| 811 | if (cmd == 'a') |
| 812 | cmd = RTM_ADD; |
| 813 | else if (cmd == 'c') |
| 814 | cmd = RTM_CHANGE; |
| 815 | else |
| 816 | cmd = RTM_DELETE; |
| 817 | m_rtmsg.m_rtm.rtm_flags = flags; |
| 818 | m_rtmsg.m_rtm.rtm_version = RTM_VERSION; |
| 819 | m_rtmsg.m_rtm.rtm_seq = ++seq; |
| 820 | m_rtmsg.m_rtm.rtm_addrs = rtm_addrs; |
| 821 | m_rtmsg.m_rtm.rtm_rmx = rt_metrics; |
| 822 | m_rtmsg.m_rtm.rtm_inits = rtm_inits; |
| 823 | |
| 824 | #define ROUND(a) (1 + (((a) - 1) | (sizeof(long) - 1))) |
| 825 | #define NEXTADDR(w, u) { if (rtm_addrs & (w)) {l = (u).sa.sa_len;\ |
| 826 | if(verbose)sodump(&(u),"u");if(l == 0) l = sizeof(int); l = ROUND(l);\ |
| 827 | bcopy((char *)&(u), cp, l); cp += l;}} |
| 828 | |
| 829 | NEXTADDR(RTA_DST, so_dst); |
| 830 | NEXTADDR(RTA_GATEWAY, so_gate); |
| 831 | NEXTADDR(RTA_NETMASK, so_mask); |
| 832 | NEXTADDR(RTA_GENMASK, so_genmask); |
| 833 | m_rtmsg.m_rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; |
| 834 | m_rtmsg.m_rtm.rtm_type = cmd; |
| 835 | if (verbose) |
| 836 | print_rtmsg(&m_rtmsg.m_rtm, l); |
| 837 | if (debugonly) |
| 838 | return 0; |
| 839 | if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { |
| 840 | perror("writing to routing socket"); |
| 841 | printf("got only %d for rlen\n", rlen); |
| 842 | return (-1); |
| 843 | } |
| 844 | return (0); |
| 845 | } |
| 846 | |
| 847 | char *msgtypes[] = { |
| 848 | "", |
| 849 | "RTM_ADD: Add Route", |
| 850 | "RTM_DELETE: Delete Route", |
| 851 | "RTM_CHANGE: Change Metrics or flags", |
| 852 | "RTM_GET: Report Metrics", |
| 853 | "RTM_LOSING: Kernel Suspects Partitioning", |
| 854 | "RTM_REDIRECT: Told to use different route", |
| 855 | "RTM_MISS: Lookup failed on this address", |
| 856 | "RTM_LOCK: fix specified metrics", |
| 857 | "RTM_OLDADD: caused by SIOCADDRT", |
| 858 | "RTM_OLDDEL: caused by SIOCDELRT", |
| 859 | 0, }; |
| 860 | |
| 861 | char metricnames[] = |
| 862 | "\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; |
| 863 | char routeflags[] = |
| 864 | "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE"; |
| 865 | |
| 866 | #define ROUNDUP(a) ((char *)(1 + (((((int)a)) - 1) | (sizeof(long) - 1)))) |
| 867 | |
| 868 | print_rtmsg(rtm, n) |
| 869 | register struct rt_msghdr *rtm; |
| 870 | { |
| 871 | char *cp; |
| 872 | register struct sockaddr *sa; |
| 873 | int i; |
| 874 | |
| 875 | if (verbose == 0) |
| 876 | return; |
| 877 | if (rtm->rtm_version != RTM_VERSION) { |
| 878 | printf("routing message version %d not understood\n", |
| 879 | rtm->rtm_version); |
| 880 | } else { |
| 881 | printf("%s\npid: %d, len %d, seq %d, errno %d, flags:", |
| 882 | msgtypes[rtm->rtm_type], rtm->rtm_pid, rtm->rtm_msglen, |
| 883 | rtm->rtm_seq, rtm->rtm_errno); |
| 884 | bprintf(stdout, rtm->rtm_flags, routeflags); |
| 885 | printf("\nlocks: "); bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); |
| 886 | printf(" inits: "); bprintf(stdout, rtm->rtm_inits, metricnames); |
| 887 | printf("\nsockaddrs: "); |
| 888 | bprintf(stdout, rtm->rtm_addrs, |
| 889 | "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR"); |
| 890 | putchar('\n'); |
| 891 | cp = ((char *)(rtm + 1)); |
| 892 | if (rtm->rtm_addrs) |
| 893 | for (i = 1; i; i <<= 1) |
| 894 | if (i & rtm->rtm_addrs) { |
| 895 | sa = (struct sockaddr *)cp; |
| 896 | printf(" %s", routename(sa)); |
| 897 | cp = ROUNDUP(cp + sa->sa_len); |
| 898 | } |
| 899 | putchar('\n'); |
| 900 | } |
| 901 | fflush(stdout); |
| 902 | } |
| 903 | |
| 904 | bprintf(fp, b, s) |
| 905 | register FILE *fp; |
| 906 | register int b; |
| 907 | register u_char *s; |
| 908 | { |
| 909 | register int i; |
| 910 | int gotsome = 0; |
| 911 | |
| 912 | if (b == 0) |
| 913 | return; |
| 914 | while (i = *s++) { |
| 915 | if (b & (1 << (i-1))) { |
| 916 | if (gotsome == 0) i = '<'; else i = ','; |
| 917 | putc(i, fp); |
| 918 | gotsome = 1; |
| 919 | for (; (i = *s) > 32; s++) |
| 920 | putc(i, fp); |
| 921 | } else |
| 922 | while (*s > 32) |
| 923 | s++; |
| 924 | } |
| 925 | if (gotsome) |
| 926 | putc('>', fp); |
| 927 | } |
| 928 | int |
| 929 | keyword(cp) |
| 930 | char *cp; |
| 931 | { |
| 932 | register struct keytab *kt = keywords; |
| 933 | while (kt->kt_cp && strcmp(kt->kt_cp, cp)) |
| 934 | kt++; |
| 935 | return kt->kt_i; |
| 936 | } |
| 937 | |
| 938 | sodump(su, which) |
| 939 | register union sockunion *su; |
| 940 | char *which; |
| 941 | { |
| 942 | switch (su->sa.sa_family) { |
| 943 | case AF_LINK: |
| 944 | printf("%s: link %s; ", which, link_ntoa(&su->sdl)); |
| 945 | break; |
| 946 | case AF_ISO: |
| 947 | printf("%s: iso %s; ", which, iso_ntoa(&su->siso.siso_addr)); |
| 948 | break; |
| 949 | case AF_INET: |
| 950 | printf("%s: inet %s; ", which, inet_ntoa(su->sin.sin_addr)); |
| 951 | break; |
| 952 | case AF_NS: |
| 953 | printf("%s: xns %s; ", which, ns_ntoa(&su->sns.sns_addr)); |
| 954 | break; |
| 955 | } |
| 956 | fflush(stdout); |
| 957 | } |