route.c revision 1.65
1 /* $NetBSD: route.c,v 1.65 2003/06/03 04:41:42 itojun Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1989, 1991, 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 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1983, 1989, 1991, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)route.c 8.6 (Berkeley) 4/28/95"; 45 #else 46 __RCSID("$NetBSD: route.c,v 1.65 2003/06/03 04:41:42 itojun Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 #include <sys/param.h> 51 #include <sys/file.h> 52 #include <sys/socket.h> 53 #include <sys/ioctl.h> 54 #include <sys/mbuf.h> 55 #include <sys/sysctl.h> 56 57 #include <net/if.h> 58 #include <net/route.h> 59 #include <net/if_dl.h> 60 #include <netinet/in.h> 61 #include <netatalk/at.h> 62 #include <netns/ns.h> 63 #include <netiso/iso.h> 64 #include <netccitt/x25.h> 65 #include <arpa/inet.h> 66 #include <netdb.h> 67 68 #include <errno.h> 69 #include <unistd.h> 70 #include <stdio.h> 71 #include <ctype.h> 72 #include <stdlib.h> 73 #include <string.h> 74 #include <time.h> 75 #include <paths.h> 76 #include <err.h> 77 78 #include "keywords.h" 79 #include "extern.h" 80 81 typedef union sockunion *sup; 82 83 int main __P((int, char **)); 84 static void usage __P((char *)) __attribute__((__noreturn__)); 85 static char *any_ntoa __P((const struct sockaddr *)); 86 static void set_metric __P((char *, int)); 87 static int newroute __P((int, char **)); 88 static void inet_makenetandmask __P((u_int32_t, struct sockaddr_in *)); 89 #ifdef INET6 90 static int inet6_makenetandmask __P((struct sockaddr_in6 *)); 91 #endif 92 static int getaddr __P((int, char *, struct hostent **)); 93 static int flushroutes __P((int, char *[])); 94 #ifndef SMALL 95 static int prefixlen __P((char *)); 96 static int x25_makemask __P((void)); 97 static void interfaces __P((void)); 98 static void monitor __P((void)); 99 static void print_getmsg __P((struct rt_msghdr *, int)); 100 static const char *linkstate __P((struct if_msghdr *)); 101 #endif /* SMALL */ 102 static int rtmsg __P((int, int )); 103 static void mask_addr __P((void)); 104 static void print_rtmsg __P((struct rt_msghdr *, int)); 105 static void pmsg_common __P((struct rt_msghdr *)); 106 static void pmsg_addrs __P((char *, int)); 107 static void bprintf __P((FILE *, int, u_char *)); 108 static int keyword __P((char *)); 109 static void sodump __P((sup, char *)); 110 static void sockaddr __P((char *, struct sockaddr *)); 111 112 union sockunion { 113 struct sockaddr sa; 114 struct sockaddr_in sin; 115 #ifdef INET6 116 struct sockaddr_in6 sin6; 117 #endif 118 struct sockaddr_at sat; 119 struct sockaddr_dl sdl; 120 #ifndef SMALL 121 struct sockaddr_ns sns; 122 struct sockaddr_iso siso; 123 struct sockaddr_x25 sx25; 124 #endif /* SMALL */ 125 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp; 126 127 int pid, rtm_addrs; 128 int sock; 129 int forcehost, forcenet, doflush, nflag, af, qflag, tflag; 130 int iflag, verbose, aflen = sizeof (struct sockaddr_in); 131 int locking, lockrest, debugonly, shortoutput, rv; 132 struct rt_metrics rt_metrics; 133 u_int32_t rtm_inits; 134 short ns_nullh[] = {0,0,0}; 135 short ns_bh[] = {-1,-1,-1}; 136 137 138 static void 139 usage(cp) 140 char *cp; 141 { 142 143 if (cp) 144 warnx("botched keyword: %s", cp); 145 (void) fprintf(stderr, 146 "Usage: %s [ -fnqvs ] cmd [[ -<qualifers> ] args ]\n", 147 getprogname()); 148 exit(1); 149 /* NOTREACHED */ 150 } 151 152 #define ROUNDUP(a) \ 153 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 154 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 155 156 int 157 main(argc, argv) 158 int argc; 159 char **argv; 160 { 161 int ch; 162 163 if (argc < 2) 164 usage(NULL); 165 166 while ((ch = getopt(argc, argv, "fnqvdts")) != -1) 167 switch(ch) { 168 case 'f': 169 doflush = 1; 170 break; 171 case 'n': 172 nflag = 1; 173 break; 174 case 'q': 175 qflag = 1; 176 break; 177 case 'v': 178 verbose = 1; 179 break; 180 case 't': 181 tflag = 1; 182 break; 183 case 'd': 184 debugonly = 1; 185 break; 186 case 's': 187 shortoutput = 1; 188 break; 189 case '?': 190 default: 191 usage(NULL); 192 /*NOTREACHED*/ 193 } 194 argc -= optind; 195 argv += optind; 196 197 pid = getpid(); 198 if (tflag) 199 sock = open("/dev/null", O_WRONLY, 0); 200 else 201 sock = socket(PF_ROUTE, SOCK_RAW, 0); 202 if (sock < 0) 203 err(1, "socket"); 204 205 if (*argv == NULL) { 206 if (doflush) 207 ch = K_FLUSH; 208 else 209 goto no_cmd; 210 } else 211 ch = keyword(*argv); 212 213 switch (ch) { 214 #ifndef SMALL 215 case K_GET: 216 #endif /* SMALL */ 217 case K_CHANGE: 218 case K_ADD: 219 case K_DELETE: 220 if (doflush) 221 (void)flushroutes(1, argv); 222 return newroute(argc, argv); 223 224 case K_SHOW: 225 show(argc, argv); 226 return 0; 227 228 #ifndef SMALL 229 case K_MONITOR: 230 monitor(); 231 return 0; 232 233 #endif /* SMALL */ 234 case K_FLUSH: 235 return flushroutes(argc, argv); 236 237 no_cmd: 238 default: 239 usage(*argv); 240 /*NOTREACHED*/ 241 } 242 } 243 244 /* 245 * Purge all entries in the routing tables not 246 * associated with network interfaces. 247 */ 248 static int 249 flushroutes(argc, argv) 250 int argc; 251 char *argv[]; 252 { 253 size_t needed; 254 int mib[6], rlen, seqno; 255 char *buf, *next, *lim; 256 struct rt_msghdr *rtm; 257 258 af = 0; 259 shutdown(sock, SHUT_RD); /* Don't want to read back our messages */ 260 if (argc > 1) { 261 argv++; 262 if (argc == 2 && **argv == '-') 263 switch (keyword(*argv + 1)) { 264 case K_INET: 265 af = AF_INET; 266 break; 267 #ifdef INET6 268 case K_INET6: 269 af = AF_INET6; 270 break; 271 #endif 272 case K_ATALK: 273 af = AF_APPLETALK; 274 break; 275 #ifndef SMALL 276 case K_XNS: 277 af = AF_NS; 278 break; 279 #endif /* SMALL */ 280 case K_LINK: 281 af = AF_LINK; 282 break; 283 #ifndef SMALL 284 case K_ISO: 285 case K_OSI: 286 af = AF_ISO; 287 break; 288 case K_X25: 289 af = AF_CCITT; 290 #endif /* SMALL */ 291 default: 292 goto bad; 293 } else 294 bad: usage(*argv); 295 } 296 mib[0] = CTL_NET; 297 mib[1] = PF_ROUTE; 298 mib[2] = 0; /* protocol */ 299 mib[3] = 0; /* wildcard address family */ 300 mib[4] = NET_RT_DUMP; 301 mib[5] = 0; /* no flags */ 302 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 303 err(1, "route-sysctl-estimate"); 304 if (needed == 0) 305 return 0; 306 if ((buf = malloc(needed)) == NULL) 307 err(1, "malloc"); 308 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 309 err(1, "actual retrieval of routing table"); 310 lim = buf + needed; 311 if (verbose) { 312 (void) printf("Examining routing table from sysctl\n"); 313 if (af) printf("(address family %s)\n", (*argv + 1)); 314 } 315 seqno = 0; /* ??? */ 316 for (next = buf; next < lim; next += rtm->rtm_msglen) { 317 rtm = (struct rt_msghdr *)next; 318 if (verbose) 319 print_rtmsg(rtm, rtm->rtm_msglen); 320 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 321 continue; 322 if (af) { 323 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 324 325 if (sa->sa_family != af) 326 continue; 327 } 328 if (debugonly) 329 continue; 330 rtm->rtm_type = RTM_DELETE; 331 rtm->rtm_seq = seqno; 332 rlen = write(sock, next, rtm->rtm_msglen); 333 if (rlen < (int)rtm->rtm_msglen) { 334 warn("write to routing socket, got %d for rlen", rlen); 335 break; 336 } 337 seqno++; 338 if (qflag) 339 continue; 340 if (verbose) 341 print_rtmsg(rtm, rlen); 342 else { 343 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 344 (void) printf("%-20.20s ", 345 routename(sa, NULL, rtm->rtm_flags)); 346 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 347 (void) printf("%-20.20s ", 348 routename(sa, NULL, RTF_HOST)); 349 (void) printf("done\n"); 350 } 351 } 352 return 0; 353 } 354 355 356 static char hexlist[] = "0123456789abcdef"; 357 358 static char * 359 any_ntoa(sa) 360 const struct sockaddr *sa; 361 { 362 static char obuf[64]; 363 const char *in; 364 char *out; 365 int len; 366 367 len = sa->sa_len; 368 in = sa->sa_data; 369 out = obuf; 370 371 do { 372 *out++ = hexlist[(*in >> 4) & 15]; 373 *out++ = hexlist[(*in++) & 15]; 374 *out++ = '.'; 375 } while (--len > 0); 376 out[-1] = '\0'; 377 return obuf; 378 } 379 380 381 int 382 netmask_length(nm, family) 383 struct sockaddr *nm; 384 int family; 385 { 386 static int 387 /* number of bits in a nibble */ 388 _t[] = { 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4 }, 389 /* good nibbles are 1111, 1110, 1100, 1000, 0000 */ 390 _g[] = { 1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,1 }; 391 int mask, good, zeroes, maskbytes, bit, i; 392 unsigned char *maskdata; 393 394 if (nm == NULL) 395 return 0; 396 397 mask = 0; 398 good = 1; 399 zeroes = 0; 400 401 switch (family) { 402 case AF_INET: { 403 struct sockaddr_in *nsin = (struct sockaddr_in *)nm; 404 maskdata = (unsigned char *) &nsin->sin_addr; 405 maskbytes = nsin->sin_len - 406 ((caddr_t)&nsin->sin_addr - (caddr_t)nsin); 407 break; 408 } 409 case AF_INET6: { 410 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nm; 411 maskdata = (unsigned char *) &sin6->sin6_addr; 412 maskbytes = sin6->sin6_len - 413 ((caddr_t)&sin6->sin6_addr - (caddr_t)sin6); 414 break; 415 } 416 default: 417 return 0; 418 } 419 420 /* 421 * Count the bits in the nibbles of the mask, and marking the 422 * netmask as not good (or at best, non-standard and very 423 * discouraged, in the case of AF_INET) if we find either of 424 * a nibble with non-contiguous bits, or a non-zero nibble 425 * after we've found a zero nibble. 426 */ 427 for (i = 0; i < maskbytes; i++) { 428 /* high nibble */ 429 mask += bit = _t[maskdata[i] >> 4]; 430 good &= _g[maskdata[i] >> 4]; 431 if (zeroes && bit) 432 good = 0; 433 if (bit == 0) 434 zeroes = 1; 435 /* low nibble */ 436 mask += bit = _t[maskdata[i] & 0xf]; 437 good &= _g[maskdata[i] & 0xf]; 438 if (zeroes && bit) 439 good = 0; 440 if (bit == 0) 441 zeroes = 1; 442 } 443 444 /* 445 * Always return the number of bits found, but as a negative 446 * if the mask wasn't one we like. 447 */ 448 return good ? mask : -mask; 449 } 450 451 char * 452 netmask_string(mask, len) 453 struct sockaddr *mask; 454 int len; 455 { 456 static char smask[16]; 457 458 if (len >= 0) 459 snprintf(smask, sizeof(smask), "%d", len); 460 else { 461 /* XXX AF_INET only?! */ 462 struct sockaddr_in nsin; 463 464 memset(&nsin, 0, sizeof(nsin)); 465 memcpy(&nsin, mask, mask->sa_len); 466 snprintf(smask, sizeof(smask), "%s", inet_ntoa(nsin.sin_addr)); 467 } 468 469 return smask; 470 } 471 472 473 char * 474 routename(sa, nm, flags) 475 struct sockaddr *sa, *nm; 476 int flags; 477 { 478 char *cp; 479 static char line[50]; 480 struct hostent *hp; 481 static char domain[MAXHOSTNAMELEN + 1]; 482 static int first = 1; 483 struct in_addr in; 484 int nml; 485 486 if ((flags & RTF_HOST) == 0) 487 return netname(sa, nm); 488 489 if (first) { 490 first = 0; 491 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 492 (cp = strchr(domain, '.'))) 493 (void)strlcpy(domain, cp + 1, sizeof(domain)); 494 else 495 domain[0] = 0; 496 } 497 498 if (sa->sa_len == 0) 499 strlcpy(line, "default", sizeof(line)); 500 else switch (sa->sa_family) { 501 502 case AF_INET: 503 in = ((struct sockaddr_in *)sa)->sin_addr; 504 nml = netmask_length(nm, AF_INET); 505 506 cp = 0; 507 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) { 508 if (nml == 0) 509 cp = "default"; 510 else { 511 static char notdefault[sizeof(NOTDEFSTRING)]; 512 513 snprintf(notdefault, sizeof(notdefault), 514 "0.0.0.0/%s", netmask_string(nm, nml)); 515 cp = notdefault; 516 } 517 } 518 if (cp == 0 && !nflag) { 519 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 520 AF_INET); 521 if (hp) { 522 if ((cp = strchr(hp->h_name, '.')) && 523 !strcmp(cp + 1, domain)) 524 *cp = 0; 525 cp = hp->h_name; 526 } 527 } 528 if (cp) 529 (void)strlcpy(line, cp, sizeof(line)); 530 else 531 (void)strlcpy(line, inet_ntoa(in), sizeof(line)); 532 break; 533 534 case AF_LINK: 535 return (link_ntoa((struct sockaddr_dl *)sa)); 536 537 #ifndef SMALL 538 #ifdef INET6 539 case AF_INET6: 540 { 541 struct sockaddr_in6 sin6; 542 int niflags; 543 544 #ifdef NI_WITHSCOPEID 545 niflags = NI_WITHSCOPEID; 546 #else 547 niflags = 0; 548 #endif 549 if (nflag) 550 niflags |= NI_NUMERICHOST; 551 memset(&sin6, 0, sizeof(sin6)); 552 memcpy(&sin6, sa, sa->sa_len); 553 sin6.sin6_len = sizeof(struct sockaddr_in6); 554 sin6.sin6_family = AF_INET6; 555 #ifdef __KAME__ 556 if (sa->sa_len == sizeof(struct sockaddr_in6) && 557 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 558 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 559 sin6.sin6_scope_id == 0) { 560 sin6.sin6_scope_id = 561 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 562 sin6.sin6_addr.s6_addr[2] = 0; 563 sin6.sin6_addr.s6_addr[3] = 0; 564 } 565 #endif 566 nml = netmask_length(nm, AF_INET6); 567 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 568 if (nml == 0) 569 strlcpy(line, "::", sizeof(line)); 570 else 571 /* noncontiguous never happens in ipv6 */ 572 snprintf(line, sizeof(line), "::/%d", nml); 573 } 574 575 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 576 line, sizeof(line), NULL, 0, niflags) != 0) 577 strlcpy(line, "invalid", sizeof(line)); 578 break; 579 } 580 #endif 581 582 case AF_NS: 583 return (ns_print((struct sockaddr_ns *)sa)); 584 585 case AF_ISO: 586 (void)snprintf(line, sizeof line, "iso %s", 587 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 588 break; 589 #endif /* SMALL */ 590 591 case AF_APPLETALK: 592 (void) snprintf(line, sizeof(line), "atalk %d.%d", 593 ((struct sockaddr_at *)sa)->sat_addr.s_net, 594 ((struct sockaddr_at *)sa)->sat_addr.s_node); 595 break; 596 597 default: 598 (void)snprintf(line, sizeof line, "(%d) %s", 599 sa->sa_family, any_ntoa(sa)); 600 break; 601 602 } 603 return (line); 604 } 605 606 /* 607 * Return the name of the network whose address is given. 608 * The address is assumed to be that of a net or subnet, not a host. 609 */ 610 char * 611 netname(sa, nm) 612 struct sockaddr *sa, *nm; 613 { 614 char *cp = 0; 615 static char line[50]; 616 struct netent *np = 0; 617 u_int32_t net, mask; 618 u_int32_t i; 619 int subnetshift, nml; 620 struct in_addr in; 621 622 switch (sa->sa_family) { 623 624 case AF_INET: 625 in = ((struct sockaddr_in *)sa)->sin_addr; 626 i = ntohl(in.s_addr); 627 nml = netmask_length(nm, AF_INET); 628 if (i == 0) { 629 if (nml == 0) 630 cp = "default"; 631 else { 632 static char notdefault[sizeof(NOTDEFSTRING)]; 633 634 snprintf(notdefault, sizeof(notdefault), 635 "0.0.0.0/%s", netmask_string(nm, nml)); 636 cp = notdefault; 637 } 638 } 639 else if (!nflag) { 640 if (IN_CLASSA(i)) { 641 mask = IN_CLASSA_NET; 642 subnetshift = 8; 643 } else if (IN_CLASSB(i)) { 644 mask = IN_CLASSB_NET; 645 subnetshift = 8; 646 } else { 647 mask = IN_CLASSC_NET; 648 subnetshift = 4; 649 } 650 /* 651 * If there are more bits than the standard mask 652 * would suggest, subnets must be in use. 653 * Guess at the subnet mask, assuming reasonable 654 * width subnet fields. 655 */ 656 while (i &~ mask) 657 mask = (int32_t)mask >> subnetshift; 658 net = i & mask; 659 while ((mask & 1) == 0) 660 mask >>= 1, net >>= 1; 661 np = getnetbyaddr(net, AF_INET); 662 if (np) 663 cp = np->n_name; 664 } 665 if (cp) 666 (void)strlcpy(line, cp, sizeof(line)); 667 else { 668 #if 0 /* XXX - This is silly... */ 669 #define C(x) ((x) & 0xff) 670 if ((i & 0xffffff) == 0) 671 (void)snprintf(line, sizeof line, "%u", 672 C(i >> 24)); 673 else if ((i & 0xffff) == 0) 674 (void)snprintf(line, sizeof line, "%u.%u", 675 C(i >> 24), C(i >> 16)); 676 else if ((i & 0xff) == 0) 677 (void)snprintf(line, sizeof line, "%u.%u.%u", 678 C(i >> 24), C(i >> 16), C(i >> 8)); 679 else 680 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", 681 C(i >> 24), C(i >> 16), C(i >> 8), C(i)); 682 #undef C 683 #else /* XXX */ 684 (void)strlcpy(line, inet_ntoa(in), sizeof(line)); 685 #endif /* XXX */ 686 } 687 break; 688 689 case AF_LINK: 690 return (link_ntoa((struct sockaddr_dl *)sa)); 691 692 #ifndef SMALL 693 #ifdef INET6 694 case AF_INET6: 695 { 696 struct sockaddr_in6 sin6; 697 int niflags; 698 699 #ifdef NI_WITHSCOPEID 700 niflags = NI_WITHSCOPEID; 701 #else 702 niflags = 0; 703 #endif 704 if (nflag) 705 niflags |= NI_NUMERICHOST; 706 memset(&sin6, 0, sizeof(sin6)); 707 memcpy(&sin6, sa, sa->sa_len); 708 sin6.sin6_len = sizeof(struct sockaddr_in6); 709 sin6.sin6_family = AF_INET6; 710 #ifdef __KAME__ 711 if (sa->sa_len == sizeof(struct sockaddr_in6) && 712 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 713 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 714 sin6.sin6_scope_id == 0) { 715 sin6.sin6_scope_id = 716 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 717 sin6.sin6_addr.s6_addr[2] = 0; 718 sin6.sin6_addr.s6_addr[3] = 0; 719 } 720 #endif 721 nml = netmask_length(nm, AF_INET6); 722 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 723 if (nml == 0) 724 strlcpy(line, "::", sizeof(line)); 725 else 726 /* noncontiguous never happens in ipv6 */ 727 snprintf(line, sizeof(line), "::/%d", nml); 728 } 729 730 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 731 line, sizeof(line), NULL, 0, niflags) != 0) 732 strlcpy(line, "invalid", sizeof(line)); 733 break; 734 } 735 #endif 736 737 case AF_NS: 738 return (ns_print((struct sockaddr_ns *)sa)); 739 740 case AF_ISO: 741 (void)snprintf(line, sizeof line, "iso %s", 742 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 743 break; 744 #endif /* SMALL */ 745 746 case AF_APPLETALK: 747 (void) snprintf(line, sizeof(line), "atalk %d.%d", 748 ((struct sockaddr_at *)sa)->sat_addr.s_net, 749 ((struct sockaddr_at *)sa)->sat_addr.s_node); 750 break; 751 752 default: 753 (void)snprintf(line, sizeof line, "af %d: %s", 754 sa->sa_family, any_ntoa(sa)); 755 break; 756 } 757 return (line); 758 } 759 760 static void 761 set_metric(value, key) 762 char *value; 763 int key; 764 { 765 int flag = 0; 766 u_long noval, *valp = &noval; 767 768 switch (key) { 769 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 770 caseof(K_MTU, RTV_MTU, rmx_mtu); 771 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 772 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 773 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 774 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 775 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 776 caseof(K_RTT, RTV_RTT, rmx_rtt); 777 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 778 } 779 rtm_inits |= flag; 780 if (lockrest || locking) 781 rt_metrics.rmx_locks |= flag; 782 if (locking) 783 locking = 0; 784 *valp = atoi(value); 785 } 786 787 static int 788 newroute(argc, argv) 789 int argc; 790 char **argv; 791 { 792 char *cmd, *dest = "", *gateway = ""; 793 const char *error; 794 int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC; 795 int key; 796 struct hostent *hp = 0; 797 798 cmd = argv[0]; 799 af = 0; 800 if (*cmd != 'g') 801 shutdown(sock, SHUT_RD); /* Don't want to read back our messages */ 802 while (--argc > 0) { 803 if (**(++argv)== '-') { 804 switch (key = keyword(1 + *argv)) { 805 806 case K_SA: 807 af = PF_ROUTE; 808 aflen = sizeof(union sockunion); 809 break; 810 811 case K_ATALK: 812 af = AF_APPLETALK; 813 aflen = sizeof(struct sockaddr_at); 814 break; 815 816 case K_INET: 817 af = AF_INET; 818 aflen = sizeof(struct sockaddr_in); 819 break; 820 821 #ifdef INET6 822 case K_INET6: 823 af = AF_INET6; 824 aflen = sizeof(struct sockaddr_in6); 825 break; 826 #endif 827 828 case K_LINK: 829 af = AF_LINK; 830 aflen = sizeof(struct sockaddr_dl); 831 break; 832 833 #ifndef SMALL 834 case K_OSI: 835 case K_ISO: 836 af = AF_ISO; 837 aflen = sizeof(struct sockaddr_iso); 838 break; 839 840 case K_X25: 841 af = AF_CCITT; 842 aflen = sizeof(struct sockaddr_x25); 843 break; 844 845 case K_XNS: 846 af = AF_NS; 847 aflen = sizeof(struct sockaddr_ns); 848 break; 849 #endif /* SMALL */ 850 851 case K_IFACE: 852 case K_INTERFACE: 853 iflag++; 854 break; 855 case K_NOSTATIC: 856 flags &= ~RTF_STATIC; 857 break; 858 case K_LLINFO: 859 flags |= RTF_LLINFO; 860 break; 861 case K_LOCK: 862 locking = 1; 863 break; 864 case K_LOCKREST: 865 lockrest = 1; 866 break; 867 case K_HOST: 868 forcehost++; 869 break; 870 case K_REJECT: 871 flags |= RTF_REJECT; 872 break; 873 case K_BLACKHOLE: 874 flags |= RTF_BLACKHOLE; 875 break; 876 case K_CLONED: 877 flags |= RTF_CLONED; 878 break; 879 case K_PROTO1: 880 flags |= RTF_PROTO1; 881 break; 882 case K_PROTO2: 883 flags |= RTF_PROTO2; 884 break; 885 case K_CLONING: 886 flags |= RTF_CLONING; 887 break; 888 case K_XRESOLVE: 889 flags |= RTF_XRESOLVE; 890 break; 891 case K_STATIC: 892 flags |= RTF_STATIC; 893 break; 894 case K_IFA: 895 if (!--argc) 896 usage(1+*argv); 897 (void) getaddr(RTA_IFA, *++argv, 0); 898 break; 899 case K_IFP: 900 if (!--argc) 901 usage(1+*argv); 902 (void) getaddr(RTA_IFP, *++argv, 0); 903 break; 904 case K_GENMASK: 905 if (!--argc) 906 usage(1+*argv); 907 (void) getaddr(RTA_GENMASK, *++argv, 0); 908 break; 909 case K_GATEWAY: 910 if (!--argc) 911 usage(1+*argv); 912 (void) getaddr(RTA_GATEWAY, *++argv, 0); 913 break; 914 case K_DST: 915 if (!--argc) 916 usage(1+*argv); 917 ishost = getaddr(RTA_DST, *++argv, &hp); 918 dest = *argv; 919 break; 920 case K_NETMASK: 921 if (!--argc) 922 usage(1+*argv); 923 (void) getaddr(RTA_NETMASK, *++argv, 0); 924 /* FALLTHROUGH */ 925 case K_NET: 926 forcenet++; 927 break; 928 case K_PREFIXLEN: 929 if (!--argc) 930 usage(1+*argv); 931 ishost = prefixlen(*++argv); 932 break; 933 case K_MTU: 934 case K_HOPCOUNT: 935 case K_EXPIRE: 936 case K_RECVPIPE: 937 case K_SENDPIPE: 938 case K_SSTHRESH: 939 case K_RTT: 940 case K_RTTVAR: 941 if (!--argc) 942 usage(1+*argv); 943 set_metric(*++argv, key); 944 break; 945 default: 946 usage(1+*argv); 947 } 948 } else { 949 if ((rtm_addrs & RTA_DST) == 0) { 950 dest = *argv; 951 ishost = getaddr(RTA_DST, *argv, &hp); 952 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 953 gateway = *argv; 954 (void) getaddr(RTA_GATEWAY, *argv, &hp); 955 } else { 956 ret = atoi(*argv); 957 958 if (ret == 0) { 959 if (!qflag && strcmp(*argv, "0") == 0) 960 warnx("%s, %s", 961 "old usage of trailing 0", 962 "assuming route to if"); 963 else 964 usage((char *)NULL); 965 iflag = 1; 966 continue; 967 } else if (ret > 0 && ret < 10) { 968 if (!qflag) { 969 warnx("%s, %s", 970 "old usage of trailing digit", 971 "assuming route via gateway"); 972 } 973 iflag = 0; 974 continue; 975 } 976 (void) getaddr(RTA_NETMASK, *argv, 0); 977 } 978 } 979 } 980 if (forcehost) 981 ishost = 1; 982 if (forcenet) 983 ishost = 0; 984 flags |= RTF_UP; 985 if (ishost) 986 flags |= RTF_HOST; 987 if (iflag == 0) 988 flags |= RTF_GATEWAY; 989 for (attempts = 1; ; attempts++) { 990 errno = 0; 991 if ((ret = rtmsg(*cmd, flags)) == 0) 992 break; 993 if (errno != ENETUNREACH && errno != ESRCH) 994 break; 995 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 996 hp->h_addr_list++; 997 memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0], 998 hp->h_length); 999 } else 1000 break; 1001 } 1002 if (*cmd == 'g') 1003 return rv; 1004 oerrno = errno; 1005 if (!qflag) { 1006 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 1007 if (*gateway) { 1008 (void) printf(": gateway %s", gateway); 1009 if (attempts > 1 && ret == 0 && af == AF_INET) 1010 (void) printf(" (%s)", 1011 inet_ntoa(so_gate.sin.sin_addr)); 1012 } 1013 if (ret == 0) 1014 (void) printf("\n"); 1015 } 1016 if (ret != 0) { 1017 switch (oerrno) { 1018 case ESRCH: 1019 error = "not in table"; 1020 break; 1021 case EBUSY: 1022 error = "entry in use"; 1023 break; 1024 case ENOBUFS: 1025 error = "routing table overflow"; 1026 break; 1027 default: 1028 error = strerror(oerrno); 1029 break; 1030 } 1031 (void) printf(": %s\n", error); 1032 return 1; 1033 } 1034 return 0; 1035 } 1036 1037 static void 1038 inet_makenetandmask(u_int32_t net, struct sockaddr_in *isin) 1039 { 1040 u_int32_t addr, mask = 0; 1041 char *cp; 1042 1043 rtm_addrs |= RTA_NETMASK; 1044 if (net == 0) 1045 mask = addr = 0; 1046 else if (net < 128) { 1047 addr = net << IN_CLASSA_NSHIFT; 1048 mask = IN_CLASSA_NET; 1049 } else if (net < 192) { 1050 addr = net << IN_CLASSA_NSHIFT; 1051 mask = IN_CLASSB_NET; 1052 } else if (net < 224) { 1053 addr = net << IN_CLASSA_NSHIFT; 1054 mask = IN_CLASSC_NET; 1055 } else if (net < 256) { 1056 addr = net << IN_CLASSA_NSHIFT; 1057 mask = IN_CLASSD_NET; 1058 } else if (net < 49152) { /* 192 * 256 */ 1059 addr = net << IN_CLASSB_NSHIFT; 1060 mask = IN_CLASSB_NET; 1061 } else if (net < 57344) { /* 224 * 256 */ 1062 addr = net << IN_CLASSB_NSHIFT; 1063 mask = IN_CLASSC_NET; 1064 } else if (net < 65536) { /* XXX See above */ 1065 addr = net << IN_CLASSB_NSHIFT; 1066 mask = IN_CLASSB_NET; 1067 } else if (net < 14680064L) { /* 224 * 65536 */ 1068 addr = net << IN_CLASSC_NSHIFT; 1069 mask = IN_CLASSC_NET; 1070 } else if (net < 16777216L) { 1071 addr = net << IN_CLASSC_NSHIFT; 1072 mask = IN_CLASSD_NET; 1073 } else { 1074 addr = net; 1075 if ((addr & IN_CLASSA_HOST) == 0) 1076 mask = IN_CLASSA_NET; 1077 else if ((addr & IN_CLASSB_HOST) == 0) 1078 mask = IN_CLASSB_NET; 1079 else if ((addr & IN_CLASSC_HOST) == 0) 1080 mask = IN_CLASSC_NET; 1081 else 1082 mask = -1; 1083 } 1084 isin->sin_addr.s_addr = htonl(addr); 1085 isin = &so_mask.sin; 1086 isin->sin_addr.s_addr = htonl(mask); 1087 isin->sin_len = 0; 1088 isin->sin_family = 0; 1089 cp = (char *)(&isin->sin_addr + 1); 1090 while (*--cp == 0 && cp > (char *)isin) 1091 ; 1092 isin->sin_len = 1 + cp - (char *)isin; 1093 } 1094 1095 #ifdef INET6 1096 /* 1097 * XXX the function may need more improvement... 1098 */ 1099 static int 1100 inet6_makenetandmask(sin6) 1101 struct sockaddr_in6 *sin6; 1102 { 1103 char *plen; 1104 struct in6_addr in6; 1105 1106 plen = NULL; 1107 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1108 sin6->sin6_scope_id == 0) { 1109 plen = "0"; 1110 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1111 /* aggregatable global unicast - RFC2374 */ 1112 memset(&in6, 0, sizeof(in6)); 1113 if (!memcmp(&sin6->sin6_addr.s6_addr[8], &in6.s6_addr[8], 8)) 1114 plen = "64"; 1115 } 1116 1117 if (!plen || strcmp(plen, "128") == 0) 1118 return 1; 1119 else { 1120 rtm_addrs |= RTA_NETMASK; 1121 (void)prefixlen(plen); 1122 return 0; 1123 } 1124 } 1125 #endif 1126 1127 /* 1128 * Interpret an argument as a network address of some kind, 1129 * returning 1 if a host address, 0 if a network address. 1130 */ 1131 static int 1132 getaddr(which, s, hpp) 1133 int which; 1134 char *s; 1135 struct hostent **hpp; 1136 { 1137 sup su; 1138 struct hostent *hp; 1139 struct netent *np; 1140 u_int32_t val; 1141 char *t; 1142 int afamily; /* local copy of af so we can change it */ 1143 1144 if (af == 0) { 1145 af = AF_INET; 1146 aflen = sizeof(struct sockaddr_in); 1147 } 1148 afamily = af; 1149 rtm_addrs |= which; 1150 switch (which) { 1151 case RTA_DST: 1152 su = &so_dst; 1153 break; 1154 case RTA_GATEWAY: 1155 su = &so_gate; 1156 break; 1157 case RTA_NETMASK: 1158 su = &so_mask; 1159 break; 1160 case RTA_GENMASK: 1161 su = &so_genmask; 1162 break; 1163 case RTA_IFP: 1164 su = &so_ifp; 1165 afamily = AF_LINK; 1166 break; 1167 case RTA_IFA: 1168 su = &so_ifa; 1169 su->sa.sa_family = af; 1170 break; 1171 default: 1172 su = NULL; 1173 usage("Internal Error"); 1174 /*NOTREACHED*/ 1175 } 1176 su->sa.sa_len = aflen; 1177 su->sa.sa_family = afamily; /* cases that don't want it have left already */ 1178 if (strcmp(s, "default") == 0) { 1179 switch (which) { 1180 case RTA_DST: 1181 forcenet++; 1182 (void) getaddr(RTA_NETMASK, s, 0); 1183 break; 1184 case RTA_NETMASK: 1185 case RTA_GENMASK: 1186 su->sa.sa_len = 0; 1187 } 1188 return (0); 1189 } 1190 switch (afamily) { 1191 #ifndef SMALL 1192 #ifdef INET6 1193 case AF_INET6: 1194 { 1195 struct addrinfo hints, *res; 1196 1197 memset(&hints, 0, sizeof(hints)); 1198 hints.ai_family = afamily; /*AF_INET6*/ 1199 hints.ai_flags = AI_NUMERICHOST; 1200 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1201 if (getaddrinfo(s, "0", &hints, &res) != 0) { 1202 hints.ai_flags = 0; 1203 if (getaddrinfo(s, "0", &hints, &res) != 0) { 1204 (void) fprintf(stderr, "%s: bad value\n", s); 1205 exit(1); 1206 } 1207 } 1208 if (sizeof(su->sin6) != res->ai_addrlen) { 1209 (void) fprintf(stderr, "%s: bad value\n", s); 1210 exit(1); 1211 } 1212 if (res->ai_next) { 1213 (void) fprintf(stderr, 1214 "%s: resolved to multiple values\n", s); 1215 exit(1); 1216 } 1217 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1218 freeaddrinfo(res); 1219 #ifdef __KAME__ 1220 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 1221 IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) && 1222 su->sin6.sin6_scope_id) { 1223 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 1224 htons(su->sin6.sin6_scope_id); 1225 su->sin6.sin6_scope_id = 0; 1226 } 1227 #endif 1228 if (hints.ai_flags == AI_NUMERICHOST) { 1229 if (which == RTA_DST) 1230 return (inet6_makenetandmask(&su->sin6)); 1231 return (0); 1232 } else 1233 return (1); 1234 } 1235 #endif 1236 1237 case AF_NS: 1238 if (which == RTA_DST) { 1239 struct sockaddr_ns *sms = &(so_mask.sns); 1240 memset(sms, 0, sizeof(*sms)); 1241 sms->sns_family = 0; 1242 sms->sns_len = 6; 1243 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 1244 rtm_addrs |= RTA_NETMASK; 1245 } 1246 su->sns.sns_addr = ns_addr(s); 1247 return (!ns_nullhost(su->sns.sns_addr)); 1248 1249 case AF_OSI: 1250 su->siso.siso_addr = *iso_addr(s); 1251 if (which == RTA_NETMASK || which == RTA_GENMASK) { 1252 char *cp = (char *)TSEL(&su->siso); 1253 su->siso.siso_nlen = 0; 1254 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 1255 su->siso.siso_len = 1 + cp - (char *)su; 1256 } 1257 return (1); 1258 1259 case AF_CCITT: 1260 ccitt_addr(s, &su->sx25); 1261 return (which == RTA_DST ? x25_makemask() : 1); 1262 #endif /* SMALL */ 1263 1264 case PF_ROUTE: 1265 su->sa.sa_len = sizeof(*su); 1266 sockaddr(s, &su->sa); 1267 return (1); 1268 1269 case AF_APPLETALK: 1270 t = strchr (s, '.'); 1271 if (!t) { 1272 badataddr: 1273 errx(1, "bad address: %s", s); 1274 } 1275 val = atoi (s); 1276 if (val > 65535) 1277 goto badataddr; 1278 su->sat.sat_addr.s_net = val; 1279 val = atoi (t); 1280 if (val > 256) 1281 goto badataddr; 1282 su->sat.sat_addr.s_node = val; 1283 rtm_addrs |= RTA_NETMASK; 1284 return(forcehost || su->sat.sat_addr.s_node != 0); 1285 1286 case AF_LINK: 1287 link_addr(s, &su->sdl); 1288 return (1); 1289 1290 case AF_INET: 1291 default: 1292 break; 1293 } 1294 1295 if (hpp == NULL) 1296 hpp = &hp; 1297 *hpp = NULL; 1298 1299 if ((t = strchr(s, '/')) != NULL && which == RTA_DST) { 1300 *t = '\0'; 1301 if ((val = inet_addr(s)) != INADDR_NONE) { 1302 inet_makenetandmask(htonl(val), &su->sin); 1303 prefixlen(&t[1]); 1304 return (0); 1305 } 1306 *t = '/'; 1307 } 1308 if (((val = inet_addr(s)) != INADDR_NONE) && 1309 (which != RTA_DST || forcenet == 0)) { 1310 su->sin.sin_addr.s_addr = val; 1311 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1312 return (1); 1313 else { 1314 val = ntohl(val); 1315 goto netdone; 1316 } 1317 } 1318 if ((val = inet_network(s)) != INADDR_NONE || 1319 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) { 1320 netdone: 1321 if (which == RTA_DST) 1322 inet_makenetandmask(val, &su->sin); 1323 return (0); 1324 } 1325 hp = gethostbyname(s); 1326 if (hp) { 1327 *hpp = hp; 1328 su->sin.sin_family = hp->h_addrtype; 1329 memmove(&su->sin.sin_addr, hp->h_addr, hp->h_length); 1330 return (1); 1331 } 1332 errx(1, "bad value: %s", s); 1333 } 1334 1335 int 1336 prefixlen(s) 1337 char *s; 1338 { 1339 int len = atoi(s), q, r; 1340 int max; 1341 1342 switch (af) { 1343 case AF_INET: 1344 max = sizeof(struct in_addr) * 8; 1345 break; 1346 #ifdef INET6 1347 case AF_INET6: 1348 max = sizeof(struct in6_addr) * 8; 1349 break; 1350 #endif 1351 default: 1352 (void) fprintf(stderr, 1353 "prefixlen is not supported with af %d\n", af); 1354 exit(1); 1355 } 1356 1357 rtm_addrs |= RTA_NETMASK; 1358 if (len < -1 || len > max) { 1359 (void) fprintf(stderr, "%s: bad value\n", s); 1360 exit(1); 1361 } 1362 1363 q = len >> 3; 1364 r = len & 7; 1365 switch (af) { 1366 case AF_INET: 1367 memset(&so_mask, 0, sizeof(so_mask)); 1368 so_mask.sin.sin_family = AF_INET; 1369 so_mask.sin.sin_len = sizeof(struct sockaddr_in); 1370 so_mask.sin.sin_addr.s_addr = htonl(0xffffffff << (32 - len)); 1371 break; 1372 #ifdef INET6 1373 case AF_INET6: 1374 so_mask.sin6.sin6_family = AF_INET6; 1375 so_mask.sin6.sin6_len = sizeof(struct sockaddr_in6); 1376 memset((void *)&so_mask.sin6.sin6_addr, 0, 1377 sizeof(so_mask.sin6.sin6_addr)); 1378 if (q > 0) 1379 memset((void *)&so_mask.sin6.sin6_addr, 0xff, q); 1380 if (r > 0) 1381 *((u_char *)&so_mask.sin6.sin6_addr + q) = 1382 (0xff00 >> r) & 0xff; 1383 break; 1384 #endif 1385 } 1386 return (len == max); 1387 } 1388 1389 #ifndef SMALL 1390 int 1391 x25_makemask() 1392 { 1393 char *cp; 1394 1395 if ((rtm_addrs & RTA_NETMASK) == 0) { 1396 rtm_addrs |= RTA_NETMASK; 1397 for (cp = (char *)&so_mask.sx25.x25_net; 1398 cp < &so_mask.sx25.x25_opts.op_flags; cp++) 1399 *cp = -1; 1400 so_mask.sx25.x25_len = (u_char)&(((sup)0)->sx25.x25_opts); 1401 } 1402 return 0; 1403 } 1404 1405 1406 char * 1407 ns_print(sns) 1408 struct sockaddr_ns *sns; 1409 { 1410 struct ns_addr work; 1411 union { union ns_net net_e; u_int32_t int32_t_e; } net; 1412 u_short port; 1413 static char mybuf[50], cport[10], chost[25]; 1414 char *host = ""; 1415 char *p; 1416 u_char *q; 1417 1418 work = sns->sns_addr; 1419 port = ntohs(work.x_port); 1420 work.x_port = 0; 1421 net.net_e = work.x_net; 1422 if (ns_nullhost(work) && net.int32_t_e == 0) { 1423 if (!port) 1424 return ("*.*"); 1425 (void)snprintf(mybuf, sizeof mybuf, "*.%XH", port); 1426 return (mybuf); 1427 } 1428 1429 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) 1430 host = "any"; 1431 else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) 1432 host = "*"; 1433 else { 1434 q = work.x_host.c_host; 1435 (void)snprintf(chost, sizeof chost, "%02X%02X%02X%02X%02X%02XH", 1436 q[0], q[1], q[2], q[3], q[4], q[5]); 1437 for (p = chost; *p == '0' && p < chost + 12; p++) 1438 /* void */; 1439 host = p; 1440 } 1441 if (port) 1442 (void)snprintf(cport, sizeof cport, ".%XH", htons(port)); 1443 else 1444 *cport = 0; 1445 1446 (void)snprintf(mybuf, sizeof mybuf, "%XH.%s%s", 1447 (u_int32_t)ntohl(net.int32_t_e), host, cport); 1448 return (mybuf); 1449 } 1450 1451 static void 1452 interfaces() 1453 { 1454 size_t needed; 1455 int mib[6]; 1456 char *buf, *lim, *next; 1457 struct rt_msghdr *rtm; 1458 1459 mib[0] = CTL_NET; 1460 mib[1] = PF_ROUTE; 1461 mib[2] = 0; /* protocol */ 1462 mib[3] = 0; /* wildcard address family */ 1463 mib[4] = NET_RT_IFLIST; 1464 mib[5] = 0; /* no flags */ 1465 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1466 err(1, "route-sysctl-estimate"); 1467 if ((buf = malloc(needed)) == NULL) 1468 err(1, "malloc"); 1469 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 1470 err(1, "actual retrieval of interface table"); 1471 lim = buf + needed; 1472 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1473 rtm = (struct rt_msghdr *)next; 1474 print_rtmsg(rtm, rtm->rtm_msglen); 1475 } 1476 } 1477 1478 static void 1479 monitor() 1480 { 1481 int n; 1482 char msg[2048]; 1483 1484 verbose = 1; 1485 if (debugonly) { 1486 interfaces(); 1487 exit(0); 1488 } 1489 for(;;) { 1490 time_t now; 1491 n = read(sock, msg, 2048); 1492 now = time(NULL); 1493 (void) printf("got message of size %d on %s", n, ctime(&now)); 1494 print_rtmsg((struct rt_msghdr *)msg, n); 1495 } 1496 } 1497 1498 #endif /* SMALL */ 1499 1500 1501 struct { 1502 struct rt_msghdr m_rtm; 1503 char m_space[512]; 1504 } m_rtmsg; 1505 1506 static int 1507 rtmsg(cmd, flags) 1508 int cmd, flags; 1509 { 1510 static int seq; 1511 int rlen; 1512 char *cp = m_rtmsg.m_space; 1513 int l; 1514 1515 #define NEXTADDR(w, u) \ 1516 if (rtm_addrs & (w)) {\ 1517 l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\ 1518 if (verbose && ! shortoutput) sodump(&(u),"u");\ 1519 } 1520 1521 errno = 0; 1522 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1523 if (cmd == 'a') 1524 cmd = RTM_ADD; 1525 else if (cmd == 'c') 1526 cmd = RTM_CHANGE; 1527 else if (cmd == 'g') { 1528 #ifdef SMALL 1529 return (-1); 1530 #else /* SMALL */ 1531 cmd = RTM_GET; 1532 if (so_ifp.sa.sa_family == 0) { 1533 so_ifp.sa.sa_family = AF_LINK; 1534 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1535 rtm_addrs |= RTA_IFP; 1536 } 1537 #endif /* SMALL */ 1538 } else 1539 cmd = RTM_DELETE; 1540 #define rtm m_rtmsg.m_rtm 1541 rtm.rtm_type = cmd; 1542 rtm.rtm_flags = flags; 1543 rtm.rtm_version = RTM_VERSION; 1544 rtm.rtm_seq = ++seq; 1545 rtm.rtm_addrs = rtm_addrs; 1546 rtm.rtm_rmx = rt_metrics; 1547 rtm.rtm_inits = rtm_inits; 1548 1549 if (rtm_addrs & RTA_NETMASK) 1550 mask_addr(); 1551 NEXTADDR(RTA_DST, so_dst); 1552 NEXTADDR(RTA_GATEWAY, so_gate); 1553 NEXTADDR(RTA_NETMASK, so_mask); 1554 NEXTADDR(RTA_GENMASK, so_genmask); 1555 NEXTADDR(RTA_IFP, so_ifp); 1556 NEXTADDR(RTA_IFA, so_ifa); 1557 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1558 if (verbose && ! shortoutput) 1559 print_rtmsg(&rtm, l); 1560 if (debugonly) 1561 return (0); 1562 if ((rlen = write(sock, (char *)&m_rtmsg, l)) < 0) { 1563 perror("writing to routing socket"); 1564 return (-1); 1565 } 1566 #ifndef SMALL 1567 if (cmd == RTM_GET) { 1568 do { 1569 l = read(sock, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1570 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1571 if (l < 0) 1572 err(1, "read from routing socket"); 1573 else 1574 print_getmsg(&rtm, l); 1575 } 1576 #endif /* SMALL */ 1577 #undef rtm 1578 return (0); 1579 } 1580 1581 static void 1582 mask_addr() 1583 { 1584 int olen = so_mask.sa.sa_len; 1585 char *cp1 = olen + (char *)&so_mask, *cp2; 1586 1587 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1588 if (*--cp1 != 0) { 1589 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1590 break; 1591 } 1592 if ((rtm_addrs & RTA_DST) == 0) 1593 return; 1594 switch (so_dst.sa.sa_family) { 1595 case AF_INET: 1596 #ifdef INET6 1597 case AF_INET6: 1598 #endif 1599 case AF_APPLETALK: 1600 #ifndef SMALL 1601 case AF_NS: 1602 case AF_CCITT: 1603 #endif /* SMALL */ 1604 case 0: 1605 return; 1606 #ifndef SMALL 1607 case AF_ISO: 1608 olen = MIN(so_dst.siso.siso_nlen, 1609 MAX(so_mask.sa.sa_len - 6, 0)); 1610 break; 1611 #endif /* SMALL */ 1612 } 1613 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1614 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1615 while (cp2 > cp1) 1616 *--cp2 = 0; 1617 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1618 while (cp1 > so_dst.sa.sa_data) 1619 *--cp1 &= *--cp2; 1620 #ifndef SMALL 1621 switch (so_dst.sa.sa_family) { 1622 case AF_ISO: 1623 so_dst.siso.siso_nlen = olen; 1624 break; 1625 } 1626 #endif /* SMALL */ 1627 } 1628 1629 char *msgtypes[] = { 1630 "", 1631 "RTM_ADD: Add Route", 1632 "RTM_DELETE: Delete Route", 1633 "RTM_CHANGE: Change Metrics or flags", 1634 "RTM_GET: Report Metrics", 1635 "RTM_LOSING: Kernel Suspects Partitioning", 1636 "RTM_REDIRECT: Told to use different route", 1637 "RTM_MISS: Lookup failed on this address", 1638 "RTM_LOCK: fix specified metrics", 1639 "RTM_OLDADD: caused by SIOCADDRT", 1640 "RTM_OLDDEL: caused by SIOCDELRT", 1641 "RTM_RESOLVE: Route created by cloning", 1642 "RTM_NEWADDR: address being added to iface", 1643 "RTM_DELADDR: address being removed from iface", 1644 "RTM_OIFINFO: iface status change (pre-1.5)", 1645 "RTM_IFINFO: iface status change", 1646 "RTM_IFANNOUNCE: iface arrival/departure", 1647 0, 1648 }; 1649 1650 char metricnames[] = 1651 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 1652 char routeflags[] = 1653 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016CLONED\017PROTO2\020PROTO1"; 1654 char ifnetflags[] = 1655 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST"; 1656 char addrnames[] = 1657 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1658 1659 1660 #ifndef SMALL 1661 static const char * 1662 linkstate(ifm) 1663 struct if_msghdr *ifm; 1664 { 1665 static char buf[64]; 1666 1667 switch (ifm->ifm_data.ifi_link_state) { 1668 case LINK_STATE_UNKNOWN: 1669 return "carrier: unknown"; 1670 case LINK_STATE_DOWN: 1671 return "carrier: no carrier"; 1672 case LINK_STATE_UP: 1673 return "carrier: active"; 1674 default: 1675 (void)snprintf(buf, sizeof(buf), "carrier: 0x%x", 1676 ifm->ifm_data.ifi_link_state); 1677 return buf; 1678 } 1679 } 1680 #endif /* SMALL */ 1681 1682 static void 1683 print_rtmsg(rtm, msglen) 1684 struct rt_msghdr *rtm; 1685 int msglen; 1686 { 1687 struct if_msghdr *ifm; 1688 struct ifa_msghdr *ifam; 1689 struct if_announcemsghdr *ifan; 1690 1691 if (verbose == 0) 1692 return; 1693 if (rtm->rtm_version != RTM_VERSION) { 1694 (void) printf("routing message version %d not understood\n", 1695 rtm->rtm_version); 1696 return; 1697 } 1698 if (msgtypes[rtm->rtm_type]) 1699 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1700 else 1701 (void)printf("#%d: ", rtm->rtm_type); 1702 (void)printf("len %d, ", rtm->rtm_msglen); 1703 switch (rtm->rtm_type) { 1704 case RTM_IFINFO: 1705 ifm = (struct if_msghdr *)rtm; 1706 (void) printf("if# %d, %s, flags:", ifm->ifm_index, 1707 #ifdef SMALL 1708 "" 1709 #else 1710 linkstate(ifm) 1711 #endif /* SMALL */ 1712 ); 1713 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1714 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1715 break; 1716 case RTM_NEWADDR: 1717 case RTM_DELADDR: 1718 ifam = (struct ifa_msghdr *)rtm; 1719 (void) printf("metric %d, flags:", ifam->ifam_metric); 1720 bprintf(stdout, ifam->ifam_flags, routeflags); 1721 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1722 break; 1723 case RTM_IFANNOUNCE: 1724 ifan = (struct if_announcemsghdr *)rtm; 1725 (void) printf("if# %d, what: ", ifan->ifan_index); 1726 switch (ifan->ifan_what) { 1727 case IFAN_ARRIVAL: 1728 printf("arrival"); 1729 break; 1730 case IFAN_DEPARTURE: 1731 printf("departure"); 1732 break; 1733 default: 1734 printf("#%d", ifan->ifan_what); 1735 break; 1736 } 1737 printf("\n"); 1738 break; 1739 default: 1740 (void) printf("pid: %d, seq %d, errno %d, flags:", 1741 rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1742 bprintf(stdout, rtm->rtm_flags, routeflags); 1743 pmsg_common(rtm); 1744 } 1745 } 1746 1747 #ifndef SMALL 1748 static void 1749 print_getmsg(rtm, msglen) 1750 struct rt_msghdr *rtm; 1751 int msglen; 1752 { 1753 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL, *ifa = NULL; 1754 struct sockaddr_dl *ifp = NULL; 1755 struct sockaddr *sa; 1756 char *cp; 1757 int i; 1758 1759 if (! shortoutput) 1760 (void) printf(" route to: %s\n", 1761 routename((struct sockaddr *) &so_dst, NULL, RTF_HOST)); 1762 if (rtm->rtm_version != RTM_VERSION) { 1763 warnx("routing message version %d not understood", 1764 rtm->rtm_version); 1765 return; 1766 } 1767 if (rtm->rtm_msglen > msglen) { 1768 warnx("message length mismatch, in packet %d, returned %d", 1769 rtm->rtm_msglen, msglen); 1770 } 1771 if (rtm->rtm_errno) { 1772 warn("RTM_GET"); 1773 return; 1774 } 1775 cp = ((char *)(rtm + 1)); 1776 if (rtm->rtm_addrs) 1777 for (i = 1; i; i <<= 1) 1778 if (i & rtm->rtm_addrs) { 1779 sa = (struct sockaddr *)cp; 1780 switch (i) { 1781 case RTA_DST: 1782 dst = sa; 1783 break; 1784 case RTA_GATEWAY: 1785 gate = sa; 1786 break; 1787 case RTA_NETMASK: 1788 mask = sa; 1789 break; 1790 case RTA_IFP: 1791 if (sa->sa_family == AF_LINK && 1792 ((struct sockaddr_dl *)sa)->sdl_nlen) 1793 ifp = (struct sockaddr_dl *)sa; 1794 break; 1795 case RTA_IFA: 1796 ifa = sa; 1797 break; 1798 } 1799 ADVANCE(cp, sa); 1800 } 1801 if (dst && mask) 1802 mask->sa_family = dst->sa_family; /* XXX */ 1803 if (dst && ! shortoutput) 1804 (void)printf("destination: %s\n", 1805 routename(dst, mask, RTF_HOST)); 1806 if (mask && ! shortoutput) { 1807 int savenflag = nflag; 1808 1809 nflag = 1; 1810 (void)printf(" mask: %s\n", 1811 routename(mask, NULL, RTF_HOST)); 1812 nflag = savenflag; 1813 } 1814 if (gate && rtm->rtm_flags & RTF_GATEWAY && ! shortoutput) 1815 (void)printf(" gateway: %s\n", 1816 routename(gate, NULL, RTF_HOST)); 1817 if (ifa && ! shortoutput) 1818 (void)printf(" local addr: %s\n", 1819 routename(ifa, NULL, RTF_HOST)); 1820 if (ifp && ! shortoutput) 1821 (void)printf(" interface: %.*s\n", 1822 ifp->sdl_nlen, ifp->sdl_data); 1823 if (! shortoutput) { 1824 (void)printf(" flags: "); 1825 bprintf(stdout, rtm->rtm_flags, routeflags); 1826 } 1827 1828 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1829 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1830 1831 if (! shortoutput) { 1832 (void) printf("\n%s\n", "\ 1833 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1834 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1835 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1836 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1837 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1838 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1839 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1840 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1841 if (rtm->rtm_rmx.rmx_expire) 1842 rtm->rtm_rmx.rmx_expire -= time(0); 1843 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1844 } 1845 #undef lock 1846 #undef msec 1847 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1848 1849 if ((rtm->rtm_addrs & RTF_GATEWAY) == 0) 1850 rv = 1; 1851 else { 1852 char *name; 1853 int addrs; 1854 1855 cp = (char *)(rtm + 1); 1856 addrs = rtm->rtm_addrs; 1857 1858 for (i = 1; i; i <<= 1) { 1859 sa = (struct sockaddr *)cp; 1860 if (i == RTF_GATEWAY) { 1861 name = routename(sa, NULL, RTF_HOST); 1862 if (name[0] == '\0') 1863 rv = 1; 1864 else if (shortoutput) 1865 printf("%s\n", name); 1866 } 1867 if (i & addrs) 1868 ADVANCE(cp, sa); 1869 } 1870 } 1871 1872 if (shortoutput) 1873 return; 1874 else if (verbose) 1875 pmsg_common(rtm); 1876 else if (rtm->rtm_addrs &~ RTA_IGN) { 1877 (void) printf("sockaddrs: "); 1878 bprintf(stdout, rtm->rtm_addrs, addrnames); 1879 putchar('\n'); 1880 } 1881 #undef RTA_IGN 1882 } 1883 #endif /* SMALL */ 1884 1885 void 1886 pmsg_common(rtm) 1887 struct rt_msghdr *rtm; 1888 { 1889 (void) printf("\nlocks: "); 1890 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1891 (void) printf(" inits: "); 1892 bprintf(stdout, rtm->rtm_inits, metricnames); 1893 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1894 } 1895 1896 static void 1897 pmsg_addrs(cp, addrs) 1898 char *cp; 1899 int addrs; 1900 { 1901 struct sockaddr *sa; 1902 int i; 1903 1904 if (addrs != 0) { 1905 (void) printf("\nsockaddrs: "); 1906 bprintf(stdout, addrs, addrnames); 1907 (void) putchar('\n'); 1908 for (i = 1; i; i <<= 1) 1909 if (i & addrs) { 1910 sa = (struct sockaddr *)cp; 1911 (void) printf(" %s", 1912 routename(sa, NULL, RTF_HOST)); 1913 ADVANCE(cp, sa); 1914 } 1915 } 1916 (void) putchar('\n'); 1917 (void) fflush(stdout); 1918 } 1919 1920 static void 1921 bprintf(fp, b, s) 1922 FILE *fp; 1923 int b; 1924 u_char *s; 1925 { 1926 int i; 1927 int gotsome = 0; 1928 1929 if (b == 0) 1930 return; 1931 while ((i = *s++) != 0) { 1932 if (b & (1 << (i-1))) { 1933 if (gotsome == 0) 1934 i = '<'; 1935 else 1936 i = ','; 1937 (void) putc(i, fp); 1938 gotsome = 1; 1939 for (; (i = *s) > 32; s++) 1940 (void) putc(i, fp); 1941 } else 1942 while (*s > 32) 1943 s++; 1944 } 1945 if (gotsome) 1946 (void) putc('>', fp); 1947 } 1948 1949 static int 1950 keyword(cp) 1951 char *cp; 1952 { 1953 struct keytab *kt = keywords; 1954 1955 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1956 kt++; 1957 return kt->kt_i; 1958 } 1959 1960 static void 1961 sodump(su, which) 1962 sup su; 1963 char *which; 1964 { 1965 #ifdef INET6 1966 char ntop_buf[NI_MAXHOST]; 1967 #endif 1968 1969 switch (su->sa.sa_family) { 1970 case AF_INET: 1971 (void) printf("%s: inet %s; ", 1972 which, inet_ntoa(su->sin.sin_addr)); 1973 break; 1974 case AF_APPLETALK: 1975 (void) printf("%s: atalk %d.%d; ", 1976 which, su->sat.sat_addr.s_net, su->sat.sat_addr.s_node); 1977 break; 1978 case AF_LINK: 1979 (void) printf("%s: link %s; ", 1980 which, link_ntoa(&su->sdl)); 1981 break; 1982 #ifndef SMALL 1983 #ifdef INET6 1984 case AF_INET6: 1985 (void) printf("%s: inet6 %s; ", 1986 which, inet_ntop(AF_INET6, &su->sin6.sin6_addr, 1987 ntop_buf, sizeof(ntop_buf))); 1988 break; 1989 #endif 1990 case AF_ISO: 1991 (void) printf("%s: iso %s; ", 1992 which, iso_ntoa(&su->siso.siso_addr)); 1993 break; 1994 case AF_NS: 1995 (void) printf("%s: xns %s; ", 1996 which, ns_ntoa(su->sns.sns_addr)); 1997 break; 1998 #endif /* SMALL */ 1999 default: 2000 (void) printf("af %p: %s; ", 2001 which, any_ntoa(&su->sa)); 2002 } 2003 (void) fflush(stdout); 2004 } 2005 2006 /* States*/ 2007 #define VIRGIN 0 2008 #define GOTONE 1 2009 #define GOTTWO 2 2010 /* Inputs */ 2011 #define DIGIT (4*0) 2012 #define END (4*1) 2013 #define DELIM (4*2) 2014 2015 static void 2016 sockaddr(addr, sa) 2017 char *addr; 2018 struct sockaddr *sa; 2019 { 2020 char *cp = (char *)sa; 2021 int size = sa->sa_len; 2022 char *cplim = cp + size; 2023 int byte = 0, state = VIRGIN, new = 0; 2024 2025 (void) memset(cp, 0, size); 2026 cp++; 2027 do { 2028 if ((*addr >= '0') && (*addr <= '9')) { 2029 new = *addr - '0'; 2030 } else if ((*addr >= 'a') && (*addr <= 'f')) { 2031 new = *addr - 'a' + 10; 2032 } else if ((*addr >= 'A') && (*addr <= 'F')) { 2033 new = *addr - 'A' + 10; 2034 } else if (*addr == 0) 2035 state |= END; 2036 else 2037 state |= DELIM; 2038 addr++; 2039 switch (state /* | INPUT */) { 2040 case GOTTWO | DIGIT: 2041 *cp++ = byte; /*FALLTHROUGH*/ 2042 case VIRGIN | DIGIT: 2043 state = GOTONE; byte = new; continue; 2044 case GOTONE | DIGIT: 2045 state = GOTTWO; byte = new + (byte << 4); continue; 2046 default: /* | DELIM */ 2047 state = VIRGIN; *cp++ = byte; byte = 0; continue; 2048 case GOTONE | END: 2049 case GOTTWO | END: 2050 *cp++ = byte; /* FALLTHROUGH */ 2051 case VIRGIN | END: 2052 break; 2053 } 2054 break; 2055 } while (cp < cplim); 2056 sa->sa_len = cp - (char *)sa; 2057 } 2058
Indexes created Fri Sep 26 20:09:58 GMT 2025