route.c revision 1.62
1 /* $NetBSD: route.c,v 1.62 2003/04/03 02:39:50 jrf 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 1.62 2003/04/03 02:39:50 jrf 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 /* The -d (debugonly) and -t (tflag) are for program debugging 167 * and are deliberately not documented. 168 * 169 * debugonly fakes the operation. If it is manipulating a route 170 * it will flush all routes not associated with a network interface. 171 * tflag uses /dev/null instead of a real socket. 172 */ 173 while ((ch = getopt(argc, argv, "fnqvdts")) != -1) 174 switch(ch) { 175 case 'f': 176 doflush = 1; 177 break; 178 case 'n': 179 nflag = 1; 180 break; 181 case 'q': 182 qflag = 1; 183 break; 184 case 'v': 185 verbose = 1; 186 break; 187 case 't': 188 tflag = 1; 189 break; 190 case 'd': 191 debugonly = 1; 192 break; 193 case 's': 194 shortoutput = 1; 195 break; 196 case '?': 197 default: 198 usage(NULL); 199 /*NOTREACHED*/ 200 } 201 argc -= optind; 202 argv += optind; 203 204 pid = getpid(); 205 if (tflag) 206 sock = open("/dev/null", O_WRONLY, 0); 207 else 208 sock = socket(PF_ROUTE, SOCK_RAW, 0); 209 if (sock < 0) 210 err(1, "socket"); 211 212 if (*argv == NULL) { 213 if (doflush) 214 ch = K_FLUSH; 215 else 216 goto no_cmd; 217 } else 218 ch = keyword(*argv); 219 220 switch (ch) { 221 #ifndef SMALL 222 case K_GET: 223 #endif /* SMALL */ 224 case K_CHANGE: 225 case K_ADD: 226 case K_DELETE: 227 if (doflush) 228 (void)flushroutes(1, argv); 229 return newroute(argc, argv); 230 231 case K_SHOW: 232 show(argc, argv); 233 return 0; 234 235 #ifndef SMALL 236 case K_MONITOR: 237 monitor(); 238 return 0; 239 240 #endif /* SMALL */ 241 case K_FLUSH: 242 return flushroutes(argc, argv); 243 244 no_cmd: 245 default: 246 usage(*argv); 247 /*NOTREACHED*/ 248 } 249 } 250 251 /* 252 * Purge all entries in the routing tables not 253 * associated with network interfaces. 254 */ 255 static int 256 flushroutes(argc, argv) 257 int argc; 258 char *argv[]; 259 { 260 size_t needed; 261 int mib[6], rlen, seqno; 262 char *buf, *next, *lim; 263 struct rt_msghdr *rtm; 264 265 af = 0; 266 shutdown(sock, SHUT_RD); /* Don't want to read back our messages */ 267 if (argc > 1) { 268 argv++; 269 if (argc == 2 && **argv == '-') 270 switch (keyword(*argv + 1)) { 271 case K_INET: 272 af = AF_INET; 273 break; 274 #ifdef INET6 275 case K_INET6: 276 af = AF_INET6; 277 break; 278 #endif 279 case K_ATALK: 280 af = AF_APPLETALK; 281 break; 282 #ifndef SMALL 283 case K_XNS: 284 af = AF_NS; 285 break; 286 #endif /* SMALL */ 287 case K_LINK: 288 af = AF_LINK; 289 break; 290 #ifndef SMALL 291 case K_ISO: 292 case K_OSI: 293 af = AF_ISO; 294 break; 295 case K_X25: 296 af = AF_CCITT; 297 #endif /* SMALL */ 298 default: 299 goto bad; 300 } else 301 bad: usage(*argv); 302 } 303 mib[0] = CTL_NET; 304 mib[1] = PF_ROUTE; 305 mib[2] = 0; /* protocol */ 306 mib[3] = 0; /* wildcard address family */ 307 mib[4] = NET_RT_DUMP; 308 mib[5] = 0; /* no flags */ 309 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 310 err(1, "route-sysctl-estimate"); 311 if (needed == 0) 312 return 0; 313 if ((buf = malloc(needed)) == NULL) 314 err(1, "malloc"); 315 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 316 err(1, "actual retrieval of routing table"); 317 lim = buf + needed; 318 if (verbose) { 319 (void) printf("Examining routing table from sysctl\n"); 320 if (af) printf("(address family %s)\n", (*argv + 1)); 321 } 322 seqno = 0; /* ??? */ 323 for (next = buf; next < lim; next += rtm->rtm_msglen) { 324 rtm = (struct rt_msghdr *)next; 325 if (verbose) 326 print_rtmsg(rtm, rtm->rtm_msglen); 327 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 328 continue; 329 if (af) { 330 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 331 332 if (sa->sa_family != af) 333 continue; 334 } 335 if (debugonly) 336 continue; 337 rtm->rtm_type = RTM_DELETE; 338 rtm->rtm_seq = seqno; 339 rlen = write(sock, next, rtm->rtm_msglen); 340 if (rlen < (int)rtm->rtm_msglen) { 341 warn("write to routing socket, got %d for rlen", rlen); 342 break; 343 } 344 seqno++; 345 if (qflag) 346 continue; 347 if (verbose) 348 print_rtmsg(rtm, rlen); 349 else { 350 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 351 (void) printf("%-20.20s ", 352 routename(sa, NULL, rtm->rtm_flags)); 353 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 354 (void) printf("%-20.20s ", 355 routename(sa, NULL, RTF_HOST)); 356 (void) printf("done\n"); 357 } 358 } 359 return 0; 360 } 361 362 363 static char hexlist[] = "0123456789abcdef"; 364 365 static char * 366 any_ntoa(sa) 367 const struct sockaddr *sa; 368 { 369 static char obuf[64]; 370 const char *in; 371 char *out; 372 int len; 373 374 len = sa->sa_len; 375 in = sa->sa_data; 376 out = obuf; 377 378 do { 379 *out++ = hexlist[(*in >> 4) & 15]; 380 *out++ = hexlist[(*in++) & 15]; 381 *out++ = '.'; 382 } while (--len > 0); 383 out[-1] = '\0'; 384 return obuf; 385 } 386 387 388 int 389 netmask_length(nm, family) 390 struct sockaddr *nm; 391 int family; 392 { 393 static int 394 /* number of bits in a nibble */ 395 _t[] = { 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4 }, 396 /* good nibbles are 1111, 1110, 1100, 1000, 0000 */ 397 _g[] = { 1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,1 }; 398 int mask, good, zeroes, maskbytes, bit, i; 399 unsigned char *maskdata; 400 401 if (nm == NULL) 402 return 0; 403 404 mask = 0; 405 good = 1; 406 zeroes = 0; 407 408 switch (family) { 409 case AF_INET: { 410 struct sockaddr_in *nsin = (struct sockaddr_in *)nm; 411 maskdata = (unsigned char *) &nsin->sin_addr; 412 maskbytes = nsin->sin_len - 413 ((caddr_t)&nsin->sin_addr - (caddr_t)nsin); 414 break; 415 } 416 case AF_INET6: { 417 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nm; 418 maskdata = (unsigned char *) &sin6->sin6_addr; 419 maskbytes = sin6->sin6_len - 420 ((caddr_t)&sin6->sin6_addr - (caddr_t)sin6); 421 break; 422 } 423 default: 424 return 0; 425 } 426 427 /* 428 * Count the bits in the nibbles of the mask, and marking the 429 * netmask as not good (or at best, non-standard and very 430 * discouraged, in the case of AF_INET) if we find either of 431 * a nibble with non-contiguous bits, or a non-zero nibble 432 * after we've found a zero nibble. 433 */ 434 for (i = 0; i < maskbytes; i++) { 435 /* high nibble */ 436 mask += bit = _t[maskdata[i] >> 4]; 437 good &= _g[maskdata[i] >> 4]; 438 if (zeroes && bit) 439 good = 0; 440 if (bit == 0) 441 zeroes = 1; 442 /* low nibble */ 443 mask += bit = _t[maskdata[i] & 0xf]; 444 good &= _g[maskdata[i] & 0xf]; 445 if (zeroes && bit) 446 good = 0; 447 if (bit == 0) 448 zeroes = 1; 449 } 450 451 /* 452 * Always return the number of bits found, but as a negative 453 * if the mask wasn't one we like. 454 */ 455 return good ? mask : -mask; 456 } 457 458 char * 459 netmask_string(mask, len) 460 struct sockaddr *mask; 461 int len; 462 { 463 static char smask[16]; 464 465 if (len >= 0) 466 snprintf(smask, sizeof(smask), "%d", len); 467 else { 468 /* XXX AF_INET only?! */ 469 struct sockaddr_in nsin; 470 471 memset(&nsin, 0, sizeof(nsin)); 472 memcpy(&nsin, mask, mask->sa_len); 473 snprintf(smask, sizeof(smask), "%s", inet_ntoa(nsin.sin_addr)); 474 } 475 476 return smask; 477 } 478 479 480 char * 481 routename(sa, nm, flags) 482 struct sockaddr *sa, *nm; 483 int flags; 484 { 485 char *cp; 486 static char line[50]; 487 struct hostent *hp; 488 static char domain[MAXHOSTNAMELEN + 1]; 489 static int first = 1; 490 struct in_addr in; 491 int nml; 492 493 if ((flags & RTF_HOST) == 0) 494 return netname(sa, nm); 495 496 if (first) { 497 first = 0; 498 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 499 (cp = strchr(domain, '.'))) { 500 (void)strncpy(domain, cp + 1, sizeof(domain) - 1); 501 domain[sizeof(domain) - 1] = '\0'; 502 } else 503 domain[0] = 0; 504 } 505 506 if (sa->sa_len == 0) { 507 strncpy(line, "default", sizeof(line) - 1); 508 line[sizeof(line) - 1] = '\0'; 509 } else switch (sa->sa_family) { 510 511 case AF_INET: 512 in = ((struct sockaddr_in *)sa)->sin_addr; 513 nml = netmask_length(nm, AF_INET); 514 515 cp = 0; 516 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) { 517 if (nml == 0) 518 cp = "default"; 519 else { 520 static char notdefault[sizeof(NOTDEFSTRING)]; 521 522 snprintf(notdefault, sizeof(notdefault), 523 "0.0.0.0/%s", netmask_string(nm, nml)); 524 cp = notdefault; 525 } 526 } 527 if (cp == 0 && !nflag) { 528 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 529 AF_INET); 530 if (hp) { 531 if ((cp = strchr(hp->h_name, '.')) && 532 !strcmp(cp + 1, domain)) 533 *cp = 0; 534 cp = hp->h_name; 535 } 536 } 537 if (cp) 538 (void)strncpy(line, cp, sizeof(line) - 1); 539 else 540 (void)strncpy(line, inet_ntoa(in), sizeof(line) - 1); 541 line[sizeof(line) - 1] = '\0'; 542 break; 543 544 case AF_LINK: 545 return (link_ntoa((struct sockaddr_dl *)sa)); 546 547 #ifndef SMALL 548 #ifdef INET6 549 case AF_INET6: 550 { 551 struct sockaddr_in6 sin6; 552 int niflags; 553 554 #ifdef NI_WITHSCOPEID 555 niflags = NI_WITHSCOPEID; 556 #else 557 niflags = 0; 558 #endif 559 if (nflag) 560 niflags |= NI_NUMERICHOST; 561 memset(&sin6, 0, sizeof(sin6)); 562 memcpy(&sin6, sa, sa->sa_len); 563 sin6.sin6_len = sizeof(struct sockaddr_in6); 564 sin6.sin6_family = AF_INET6; 565 #ifdef __KAME__ 566 if (sa->sa_len == sizeof(struct sockaddr_in6) && 567 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 568 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 569 sin6.sin6_scope_id == 0) { 570 sin6.sin6_scope_id = 571 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 572 sin6.sin6_addr.s6_addr[2] = 0; 573 sin6.sin6_addr.s6_addr[3] = 0; 574 } 575 #endif 576 nml = netmask_length(nm, AF_INET6); 577 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 578 if (nml == 0) { 579 strncpy(line, "::", sizeof(line) - 1); 580 line[sizeof(line) - 1] = '\0'; 581 } 582 else 583 /* noncontiguous never happens in ipv6 */ 584 snprintf(line, sizeof(line), "::/%d", nml); 585 } 586 587 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 588 line, sizeof(line), NULL, 0, niflags) != 0) 589 strncpy(line, "invalid", sizeof(line)); 590 break; 591 } 592 #endif 593 594 case AF_NS: 595 return (ns_print((struct sockaddr_ns *)sa)); 596 597 case AF_ISO: 598 (void)snprintf(line, sizeof line, "iso %s", 599 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 600 break; 601 #endif /* SMALL */ 602 603 case AF_APPLETALK: 604 (void) snprintf(line, sizeof(line), "atalk %d.%d", 605 ((struct sockaddr_at *)sa)->sat_addr.s_net, 606 ((struct sockaddr_at *)sa)->sat_addr.s_node); 607 break; 608 609 default: 610 (void)snprintf(line, sizeof line, "(%d) %s", 611 sa->sa_family, any_ntoa(sa)); 612 break; 613 614 } 615 return (line); 616 } 617 618 /* 619 * Return the name of the network whose address is given. 620 * The address is assumed to be that of a net or subnet, not a host. 621 */ 622 char * 623 netname(sa, nm) 624 struct sockaddr *sa, *nm; 625 { 626 char *cp = 0; 627 static char line[50]; 628 struct netent *np = 0; 629 u_int32_t net, mask; 630 u_int32_t i; 631 int subnetshift, nml; 632 struct in_addr in; 633 634 switch (sa->sa_family) { 635 636 case AF_INET: 637 in = ((struct sockaddr_in *)sa)->sin_addr; 638 i = ntohl(in.s_addr); 639 nml = netmask_length(nm, AF_INET); 640 if (i == 0) { 641 if (nml == 0) 642 cp = "default"; 643 else { 644 static char notdefault[sizeof(NOTDEFSTRING)]; 645 646 snprintf(notdefault, sizeof(notdefault), 647 "0.0.0.0/%s", netmask_string(nm, nml)); 648 cp = notdefault; 649 } 650 } 651 else if (!nflag) { 652 if (IN_CLASSA(i)) { 653 mask = IN_CLASSA_NET; 654 subnetshift = 8; 655 } else if (IN_CLASSB(i)) { 656 mask = IN_CLASSB_NET; 657 subnetshift = 8; 658 } else { 659 mask = IN_CLASSC_NET; 660 subnetshift = 4; 661 } 662 /* 663 * If there are more bits than the standard mask 664 * would suggest, subnets must be in use. 665 * Guess at the subnet mask, assuming reasonable 666 * width subnet fields. 667 */ 668 while (i &~ mask) 669 mask = (int32_t)mask >> subnetshift; 670 net = i & mask; 671 while ((mask & 1) == 0) 672 mask >>= 1, net >>= 1; 673 np = getnetbyaddr(net, AF_INET); 674 if (np) 675 cp = np->n_name; 676 } 677 if (cp) { 678 (void)strncpy(line, cp, sizeof(line) - 1); 679 line[sizeof(line) - 1] = '\0'; 680 } else { 681 #if 0 /* XXX - This is silly... */ 682 #define C(x) ((x) & 0xff) 683 if ((i & 0xffffff) == 0) 684 (void)snprintf(line, sizeof line, "%u", 685 C(i >> 24)); 686 else if ((i & 0xffff) == 0) 687 (void)snprintf(line, sizeof line, "%u.%u", 688 C(i >> 24), C(i >> 16)); 689 else if ((i & 0xff) == 0) 690 (void)snprintf(line, sizeof line, "%u.%u.%u", 691 C(i >> 24), C(i >> 16), C(i >> 8)); 692 else 693 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", 694 C(i >> 24), C(i >> 16), C(i >> 8), C(i)); 695 #undef C 696 #else /* XXX */ 697 (void)strncpy(line, inet_ntoa(in), sizeof(line) - 1); 698 #endif /* XXX */ 699 } 700 break; 701 702 case AF_LINK: 703 return (link_ntoa((struct sockaddr_dl *)sa)); 704 705 #ifndef SMALL 706 #ifdef INET6 707 case AF_INET6: 708 { 709 struct sockaddr_in6 sin6; 710 int niflags; 711 712 #ifdef NI_WITHSCOPEID 713 niflags = NI_WITHSCOPEID; 714 #else 715 niflags = 0; 716 #endif 717 if (nflag) 718 niflags |= NI_NUMERICHOST; 719 memset(&sin6, 0, sizeof(sin6)); 720 memcpy(&sin6, sa, sa->sa_len); 721 sin6.sin6_len = sizeof(struct sockaddr_in6); 722 sin6.sin6_family = AF_INET6; 723 #ifdef __KAME__ 724 if (sa->sa_len == sizeof(struct sockaddr_in6) && 725 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 726 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 727 sin6.sin6_scope_id == 0) { 728 sin6.sin6_scope_id = 729 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 730 sin6.sin6_addr.s6_addr[2] = 0; 731 sin6.sin6_addr.s6_addr[3] = 0; 732 } 733 #endif 734 nml = netmask_length(nm, AF_INET6); 735 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 736 if (nml == 0) { 737 strncpy(line, "::", sizeof(line) - 1); 738 line[sizeof(line) - 1] = '\0'; 739 } 740 else 741 /* noncontiguous never happens in ipv6 */ 742 snprintf(line, sizeof(line), "::/%d", nml); 743 } 744 745 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 746 line, sizeof(line), NULL, 0, niflags) != 0) 747 strncpy(line, "invalid", sizeof(line)); 748 break; 749 } 750 #endif 751 752 case AF_NS: 753 return (ns_print((struct sockaddr_ns *)sa)); 754 755 case AF_ISO: 756 (void)snprintf(line, sizeof line, "iso %s", 757 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 758 break; 759 #endif /* SMALL */ 760 761 case AF_APPLETALK: 762 (void) snprintf(line, sizeof(line), "atalk %d.%d", 763 ((struct sockaddr_at *)sa)->sat_addr.s_net, 764 ((struct sockaddr_at *)sa)->sat_addr.s_node); 765 break; 766 767 default: 768 (void)snprintf(line, sizeof line, "af %d: %s", 769 sa->sa_family, any_ntoa(sa)); 770 break; 771 } 772 return (line); 773 } 774 775 static void 776 set_metric(value, key) 777 char *value; 778 int key; 779 { 780 int flag = 0; 781 u_long noval, *valp = &noval; 782 783 switch (key) { 784 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 785 caseof(K_MTU, RTV_MTU, rmx_mtu); 786 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 787 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 788 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 789 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 790 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 791 caseof(K_RTT, RTV_RTT, rmx_rtt); 792 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 793 } 794 rtm_inits |= flag; 795 if (lockrest || locking) 796 rt_metrics.rmx_locks |= flag; 797 if (locking) 798 locking = 0; 799 *valp = atoi(value); 800 } 801 802 static int 803 newroute(argc, argv) 804 int argc; 805 char **argv; 806 { 807 char *cmd, *dest = "", *gateway = ""; 808 const char *error; 809 int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC; 810 int key; 811 struct hostent *hp = 0; 812 813 cmd = argv[0]; 814 af = 0; 815 if (*cmd != 'g') 816 shutdown(sock, SHUT_RD); /* Don't want to read back our messages */ 817 while (--argc > 0) { 818 if (**(++argv)== '-') { 819 switch (key = keyword(1 + *argv)) { 820 821 case K_SA: 822 af = PF_ROUTE; 823 aflen = sizeof(union sockunion); 824 break; 825 826 case K_ATALK: 827 af = AF_APPLETALK; 828 aflen = sizeof(struct sockaddr_at); 829 break; 830 831 case K_INET: 832 af = AF_INET; 833 aflen = sizeof(struct sockaddr_in); 834 break; 835 836 #ifdef INET6 837 case K_INET6: 838 af = AF_INET6; 839 aflen = sizeof(struct sockaddr_in6); 840 break; 841 #endif 842 843 case K_LINK: 844 af = AF_LINK; 845 aflen = sizeof(struct sockaddr_dl); 846 break; 847 848 #ifndef SMALL 849 case K_OSI: 850 case K_ISO: 851 af = AF_ISO; 852 aflen = sizeof(struct sockaddr_iso); 853 break; 854 855 case K_X25: 856 af = AF_CCITT; 857 aflen = sizeof(struct sockaddr_x25); 858 break; 859 860 case K_XNS: 861 af = AF_NS; 862 aflen = sizeof(struct sockaddr_ns); 863 break; 864 #endif /* SMALL */ 865 866 case K_IFACE: 867 case K_INTERFACE: 868 iflag++; 869 break; 870 case K_NOSTATIC: 871 flags &= ~RTF_STATIC; 872 break; 873 case K_LLINFO: 874 flags |= RTF_LLINFO; 875 break; 876 case K_LOCK: 877 locking = 1; 878 break; 879 case K_LOCKREST: 880 lockrest = 1; 881 break; 882 case K_HOST: 883 forcehost++; 884 break; 885 case K_REJECT: 886 flags |= RTF_REJECT; 887 break; 888 case K_BLACKHOLE: 889 flags |= RTF_BLACKHOLE; 890 break; 891 case K_CLONED: 892 flags |= RTF_CLONED; 893 break; 894 case K_PROTO1: 895 flags |= RTF_PROTO1; 896 break; 897 case K_PROTO2: 898 flags |= RTF_PROTO2; 899 break; 900 case K_CLONING: 901 flags |= RTF_CLONING; 902 break; 903 case K_XRESOLVE: 904 flags |= RTF_XRESOLVE; 905 break; 906 case K_STATIC: 907 flags |= RTF_STATIC; 908 break; 909 case K_IFA: 910 if (!--argc) 911 usage(1+*argv); 912 (void) getaddr(RTA_IFA, *++argv, 0); 913 break; 914 case K_IFP: 915 if (!--argc) 916 usage(1+*argv); 917 (void) getaddr(RTA_IFP, *++argv, 0); 918 break; 919 case K_GENMASK: 920 if (!--argc) 921 usage(1+*argv); 922 (void) getaddr(RTA_GENMASK, *++argv, 0); 923 break; 924 case K_GATEWAY: 925 if (!--argc) 926 usage(1+*argv); 927 (void) getaddr(RTA_GATEWAY, *++argv, 0); 928 break; 929 case K_DST: 930 if (!--argc) 931 usage(1+*argv); 932 ishost = getaddr(RTA_DST, *++argv, &hp); 933 dest = *argv; 934 break; 935 case K_NETMASK: 936 if (!--argc) 937 usage(1+*argv); 938 (void) getaddr(RTA_NETMASK, *++argv, 0); 939 /* FALLTHROUGH */ 940 case K_NET: 941 forcenet++; 942 break; 943 case K_PREFIXLEN: 944 if (!--argc) 945 usage(1+*argv); 946 ishost = prefixlen(*++argv); 947 break; 948 case K_MTU: 949 case K_HOPCOUNT: 950 case K_EXPIRE: 951 case K_RECVPIPE: 952 case K_SENDPIPE: 953 case K_SSTHRESH: 954 case K_RTT: 955 case K_RTTVAR: 956 if (!--argc) 957 usage(1+*argv); 958 set_metric(*++argv, key); 959 break; 960 default: 961 usage(1+*argv); 962 } 963 } else { 964 if ((rtm_addrs & RTA_DST) == 0) { 965 dest = *argv; 966 ishost = getaddr(RTA_DST, *argv, &hp); 967 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 968 gateway = *argv; 969 (void) getaddr(RTA_GATEWAY, *argv, &hp); 970 } else { 971 ret = atoi(*argv); 972 973 if (ret == 0) { 974 if (!qflag && strcmp(*argv, "0") == 0) 975 warnx("%s, %s", 976 "old usage of trailing 0", 977 "assuming route to if"); 978 else 979 usage((char *)NULL); 980 iflag = 1; 981 continue; 982 } else if (ret > 0 && ret < 10) { 983 if (!qflag) { 984 warnx("%s, %s", 985 "old usage of trailing digit", 986 "assuming route via gateway"); 987 } 988 iflag = 0; 989 continue; 990 } 991 (void) getaddr(RTA_NETMASK, *argv, 0); 992 } 993 } 994 } 995 if (forcehost) 996 ishost = 1; 997 if (forcenet) 998 ishost = 0; 999 flags |= RTF_UP; 1000 if (ishost) 1001 flags |= RTF_HOST; 1002 if (iflag == 0) 1003 flags |= RTF_GATEWAY; 1004 for (attempts = 1; ; attempts++) { 1005 errno = 0; 1006 if ((ret = rtmsg(*cmd, flags)) == 0) 1007 break; 1008 if (errno != ENETUNREACH && errno != ESRCH) 1009 break; 1010 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 1011 hp->h_addr_list++; 1012 memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0], 1013 hp->h_length); 1014 } else 1015 break; 1016 } 1017 if (*cmd == 'g') 1018 return rv; 1019 oerrno = errno; 1020 if (!qflag) { 1021 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 1022 if (*gateway) { 1023 (void) printf(": gateway %s", gateway); 1024 if (attempts > 1 && ret == 0 && af == AF_INET) 1025 (void) printf(" (%s)", 1026 inet_ntoa(so_gate.sin.sin_addr)); 1027 } 1028 if (ret == 0) 1029 (void) printf("\n"); 1030 } 1031 if (ret != 0) { 1032 switch (oerrno) { 1033 case ESRCH: 1034 error = "not in table"; 1035 break; 1036 case EBUSY: 1037 error = "entry in use"; 1038 break; 1039 case ENOBUFS: 1040 error = "routing table overflow"; 1041 break; 1042 default: 1043 error = strerror(oerrno); 1044 break; 1045 } 1046 (void) printf(": %s\n", error); 1047 return 1; 1048 } 1049 return 0; 1050 } 1051 1052 static void 1053 inet_makenetandmask(net, isin) 1054 u_int32_t net; 1055 struct sockaddr_in *isin; 1056 { 1057 u_int32_t addr, mask = 0; 1058 char *cp; 1059 1060 rtm_addrs |= RTA_NETMASK; 1061 if (net == 0) 1062 mask = addr = 0; 1063 else if (net < 128) { 1064 addr = net << IN_CLASSA_NSHIFT; 1065 mask = IN_CLASSA_NET; 1066 } else if (net < 65536) { 1067 addr = net << IN_CLASSB_NSHIFT; 1068 mask = IN_CLASSB_NET; 1069 } else if (net < 16777216L) { 1070 addr = net << IN_CLASSC_NSHIFT; 1071 mask = IN_CLASSC_NET; 1072 } else { 1073 addr = net; 1074 if ((addr & IN_CLASSA_HOST) == 0) 1075 mask = IN_CLASSA_NET; 1076 else if ((addr & IN_CLASSB_HOST) == 0) 1077 mask = IN_CLASSB_NET; 1078 else if ((addr & IN_CLASSC_HOST) == 0) 1079 mask = IN_CLASSC_NET; 1080 else 1081 mask = -1; 1082 } 1083 isin->sin_addr.s_addr = htonl(addr); 1084 isin = &so_mask.sin; 1085 isin->sin_addr.s_addr = htonl(mask); 1086 isin->sin_len = 0; 1087 isin->sin_family = 0; 1088 cp = (char *)(&isin->sin_addr + 1); 1089 while (*--cp == 0 && cp > (char *)isin) 1090 ; 1091 isin->sin_len = 1 + cp - (char *)isin; 1092 } 1093 1094 #ifdef INET6 1095 /* 1096 * XXX the function may need more improvement... 1097 */ 1098 static int 1099 inet6_makenetandmask(sin6) 1100 struct sockaddr_in6 *sin6; 1101 { 1102 char *plen; 1103 struct in6_addr in6; 1104 1105 plen = NULL; 1106 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1107 sin6->sin6_scope_id == 0) { 1108 plen = "0"; 1109 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1110 /* aggregatable global unicast - RFC2374 */ 1111 memset(&in6, 0, sizeof(in6)); 1112 if (!memcmp(&sin6->sin6_addr.s6_addr[8], &in6.s6_addr[8], 8)) 1113 plen = "64"; 1114 } 1115 1116 if (!plen || strcmp(plen, "128") == 0) 1117 return 1; 1118 else { 1119 rtm_addrs |= RTA_NETMASK; 1120 (void)prefixlen(plen); 1121 return 0; 1122 } 1123 } 1124 #endif 1125 1126 /* 1127 * Interpret an argument as a network address of some kind, 1128 * returning 1 if a host address, 0 if a network address. 1129 */ 1130 static int 1131 getaddr(which, s, hpp) 1132 int which; 1133 char *s; 1134 struct hostent **hpp; 1135 { 1136 sup su; 1137 struct hostent *hp; 1138 struct netent *np; 1139 u_int32_t val; 1140 char *t; 1141 int afamily; /* local copy of af so we can change it */ 1142 1143 if (af == 0) { 1144 af = AF_INET; 1145 aflen = sizeof(struct sockaddr_in); 1146 } 1147 afamily = af; 1148 rtm_addrs |= which; 1149 switch (which) { 1150 case RTA_DST: 1151 su = &so_dst; 1152 break; 1153 case RTA_GATEWAY: 1154 su = &so_gate; 1155 break; 1156 case RTA_NETMASK: 1157 su = &so_mask; 1158 break; 1159 case RTA_GENMASK: 1160 su = &so_genmask; 1161 break; 1162 case RTA_IFP: 1163 su = &so_ifp; 1164 afamily = AF_LINK; 1165 break; 1166 case RTA_IFA: 1167 su = &so_ifa; 1168 su->sa.sa_family = af; 1169 break; 1170 default: 1171 su = NULL; 1172 usage("Internal Error"); 1173 /*NOTREACHED*/ 1174 } 1175 su->sa.sa_len = aflen; 1176 su->sa.sa_family = afamily; /* cases that don't want it have left already */ 1177 if (strcmp(s, "default") == 0) { 1178 switch (which) { 1179 case RTA_DST: 1180 forcenet++; 1181 (void) getaddr(RTA_NETMASK, s, 0); 1182 break; 1183 case RTA_NETMASK: 1184 case RTA_GENMASK: 1185 su->sa.sa_len = 0; 1186 } 1187 return (0); 1188 } 1189 switch (afamily) { 1190 #ifndef SMALL 1191 #ifdef INET6 1192 case AF_INET6: 1193 { 1194 struct addrinfo hints, *res; 1195 1196 memset(&hints, 0, sizeof(hints)); 1197 hints.ai_family = afamily; /*AF_INET6*/ 1198 hints.ai_flags = AI_NUMERICHOST; 1199 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1200 if (getaddrinfo(s, "0", &hints, &res) != 0) { 1201 hints.ai_flags = 0; 1202 if (getaddrinfo(s, "0", &hints, &res) != 0) { 1203 (void) fprintf(stderr, "%s: bad value\n", s); 1204 exit(1); 1205 } 1206 } 1207 if (sizeof(su->sin6) != res->ai_addrlen) { 1208 (void) fprintf(stderr, "%s: bad value\n", s); 1209 exit(1); 1210 } 1211 if (res->ai_next) { 1212 (void) fprintf(stderr, 1213 "%s: resolved to multiple values\n", s); 1214 exit(1); 1215 } 1216 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1217 freeaddrinfo(res); 1218 #ifdef __KAME__ 1219 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 1220 IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) && 1221 su->sin6.sin6_scope_id) { 1222 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 1223 htons(su->sin6.sin6_scope_id); 1224 su->sin6.sin6_scope_id = 0; 1225 } 1226 #endif 1227 if (hints.ai_flags == AI_NUMERICHOST) { 1228 if (which == RTA_DST) 1229 return (inet6_makenetandmask(&su->sin6)); 1230 return (0); 1231 } else 1232 return (1); 1233 } 1234 #endif 1235 1236 case AF_NS: 1237 if (which == RTA_DST) { 1238 struct sockaddr_ns *sms = &(so_mask.sns); 1239 memset(sms, 0, sizeof(*sms)); 1240 sms->sns_family = 0; 1241 sms->sns_len = 6; 1242 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 1243 rtm_addrs |= RTA_NETMASK; 1244 } 1245 su->sns.sns_addr = ns_addr(s); 1246 return (!ns_nullhost(su->sns.sns_addr)); 1247 1248 case AF_OSI: 1249 su->siso.siso_addr = *iso_addr(s); 1250 if (which == RTA_NETMASK || which == RTA_GENMASK) { 1251 char *cp = (char *)TSEL(&su->siso); 1252 su->siso.siso_nlen = 0; 1253 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 1254 su->siso.siso_len = 1 + cp - (char *)su; 1255 } 1256 return (1); 1257 1258 case AF_CCITT: 1259 ccitt_addr(s, &su->sx25); 1260 return (which == RTA_DST ? x25_makemask() : 1); 1261 #endif /* SMALL */ 1262 1263 case PF_ROUTE: 1264 su->sa.sa_len = sizeof(*su); 1265 sockaddr(s, &su->sa); 1266 return (1); 1267 1268 case AF_APPLETALK: 1269 t = strchr (s, '.'); 1270 if (!t) { 1271 badataddr: 1272 errx(1, "bad address: %s", s); 1273 } 1274 val = atoi (s); 1275 if (val > 65535) 1276 goto badataddr; 1277 su->sat.sat_addr.s_net = val; 1278 val = atoi (t); 1279 if (val > 256) 1280 goto badataddr; 1281 su->sat.sat_addr.s_node = val; 1282 rtm_addrs |= RTA_NETMASK; 1283 return(forcehost || su->sat.sat_addr.s_node != 0); 1284 1285 case AF_LINK: 1286 link_addr(s, &su->sdl); 1287 return (1); 1288 1289 case AF_INET: 1290 default: 1291 break; 1292 } 1293 1294 if (hpp == NULL) 1295 hpp = &hp; 1296 *hpp = NULL; 1297 if (((val = inet_addr(s)) != INADDR_NONE) && 1298 (which != RTA_DST || forcenet == 0)) { 1299 su->sin.sin_addr.s_addr = val; 1300 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1301 return (1); 1302 else { 1303 val = ntohl(val); 1304 goto netdone; 1305 } 1306 } 1307 if ((val = inet_network(s)) != INADDR_NONE || 1308 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) { 1309 netdone: 1310 if (which == RTA_DST) 1311 inet_makenetandmask(val, &su->sin); 1312 return (0); 1313 } 1314 hp = gethostbyname(s); 1315 if (hp) { 1316 *hpp = hp; 1317 su->sin.sin_family = hp->h_addrtype; 1318 memmove(&su->sin.sin_addr, hp->h_addr, hp->h_length); 1319 return (1); 1320 } 1321 errx(1, "bad value: %s", s); 1322 } 1323 1324 int 1325 prefixlen(s) 1326 char *s; 1327 { 1328 int len = atoi(s), q, r; 1329 int max; 1330 1331 switch (af) { 1332 case AF_INET: 1333 max = sizeof(struct in_addr) * 8; 1334 break; 1335 #ifdef INET6 1336 case AF_INET6: 1337 max = sizeof(struct in6_addr) * 8; 1338 break; 1339 #endif 1340 default: 1341 (void) fprintf(stderr, 1342 "prefixlen is not supported with af %d\n", af); 1343 exit(1); 1344 } 1345 1346 rtm_addrs |= RTA_NETMASK; 1347 if (len < -1 || len > max) { 1348 (void) fprintf(stderr, "%s: bad value\n", s); 1349 exit(1); 1350 } 1351 1352 q = len >> 3; 1353 r = len & 7; 1354 switch (af) { 1355 case AF_INET: 1356 memset(&so_mask, 0, sizeof(so_mask)); 1357 so_mask.sin.sin_family = AF_INET; 1358 so_mask.sin.sin_len = sizeof(struct sockaddr_in); 1359 so_mask.sin.sin_addr.s_addr = htonl(0xffffffff << (32 - len)); 1360 break; 1361 #ifdef INET6 1362 case AF_INET6: 1363 so_mask.sin6.sin6_family = AF_INET6; 1364 so_mask.sin6.sin6_len = sizeof(struct sockaddr_in6); 1365 memset((void *)&so_mask.sin6.sin6_addr, 0, 1366 sizeof(so_mask.sin6.sin6_addr)); 1367 if (q > 0) 1368 memset((void *)&so_mask.sin6.sin6_addr, 0xff, q); 1369 if (r > 0) 1370 *((u_char *)&so_mask.sin6.sin6_addr + q) = 1371 (0xff00 >> r) & 0xff; 1372 break; 1373 #endif 1374 } 1375 return (len == max); 1376 } 1377 1378 #ifndef SMALL 1379 int 1380 x25_makemask() 1381 { 1382 char *cp; 1383 1384 if ((rtm_addrs & RTA_NETMASK) == 0) { 1385 rtm_addrs |= RTA_NETMASK; 1386 for (cp = (char *)&so_mask.sx25.x25_net; 1387 cp < &so_mask.sx25.x25_opts.op_flags; cp++) 1388 *cp = -1; 1389 so_mask.sx25.x25_len = (u_char)&(((sup)0)->sx25.x25_opts); 1390 } 1391 return 0; 1392 } 1393 1394 1395 char * 1396 ns_print(sns) 1397 struct sockaddr_ns *sns; 1398 { 1399 struct ns_addr work; 1400 union { union ns_net net_e; u_int32_t int32_t_e; } net; 1401 u_short port; 1402 static char mybuf[50], cport[10], chost[25]; 1403 char *host = ""; 1404 char *p; 1405 u_char *q; 1406 1407 work = sns->sns_addr; 1408 port = ntohs(work.x_port); 1409 work.x_port = 0; 1410 net.net_e = work.x_net; 1411 if (ns_nullhost(work) && net.int32_t_e == 0) { 1412 if (!port) 1413 return ("*.*"); 1414 (void)snprintf(mybuf, sizeof mybuf, "*.%XH", port); 1415 return (mybuf); 1416 } 1417 1418 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) 1419 host = "any"; 1420 else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) 1421 host = "*"; 1422 else { 1423 q = work.x_host.c_host; 1424 (void)snprintf(chost, sizeof chost, "%02X%02X%02X%02X%02X%02XH", 1425 q[0], q[1], q[2], q[3], q[4], q[5]); 1426 for (p = chost; *p == '0' && p < chost + 12; p++) 1427 /* void */; 1428 host = p; 1429 } 1430 if (port) 1431 (void)snprintf(cport, sizeof cport, ".%XH", htons(port)); 1432 else 1433 *cport = 0; 1434 1435 (void)snprintf(mybuf, sizeof mybuf, "%XH.%s%s", 1436 (u_int32_t)ntohl(net.int32_t_e), host, cport); 1437 return (mybuf); 1438 } 1439 1440 static void 1441 interfaces() 1442 { 1443 size_t needed; 1444 int mib[6]; 1445 char *buf, *lim, *next; 1446 struct rt_msghdr *rtm; 1447 1448 mib[0] = CTL_NET; 1449 mib[1] = PF_ROUTE; 1450 mib[2] = 0; /* protocol */ 1451 mib[3] = 0; /* wildcard address family */ 1452 mib[4] = NET_RT_IFLIST; 1453 mib[5] = 0; /* no flags */ 1454 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1455 err(1, "route-sysctl-estimate"); 1456 if ((buf = malloc(needed)) == NULL) 1457 err(1, "malloc"); 1458 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 1459 err(1, "actual retrieval of interface table"); 1460 lim = buf + needed; 1461 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1462 rtm = (struct rt_msghdr *)next; 1463 print_rtmsg(rtm, rtm->rtm_msglen); 1464 } 1465 } 1466 1467 static void 1468 monitor() 1469 { 1470 int n; 1471 char msg[2048]; 1472 1473 verbose = 1; 1474 if (debugonly) { 1475 interfaces(); 1476 exit(0); 1477 } 1478 for(;;) { 1479 time_t now; 1480 n = read(sock, msg, 2048); 1481 now = time(NULL); 1482 (void) printf("got message of size %d on %s", n, ctime(&now)); 1483 print_rtmsg((struct rt_msghdr *)msg, n); 1484 } 1485 } 1486 1487 #endif /* SMALL */ 1488 1489 1490 struct { 1491 struct rt_msghdr m_rtm; 1492 char m_space[512]; 1493 } m_rtmsg; 1494 1495 static int 1496 rtmsg(cmd, flags) 1497 int cmd, flags; 1498 { 1499 static int seq; 1500 int rlen; 1501 char *cp = m_rtmsg.m_space; 1502 int l; 1503 1504 #define NEXTADDR(w, u) \ 1505 if (rtm_addrs & (w)) {\ 1506 l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\ 1507 if (verbose && ! shortoutput) sodump(&(u),"u");\ 1508 } 1509 1510 errno = 0; 1511 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1512 if (cmd == 'a') 1513 cmd = RTM_ADD; 1514 else if (cmd == 'c') 1515 cmd = RTM_CHANGE; 1516 else if (cmd == 'g') { 1517 #ifdef SMALL 1518 return (-1); 1519 #else /* SMALL */ 1520 cmd = RTM_GET; 1521 if (so_ifp.sa.sa_family == 0) { 1522 so_ifp.sa.sa_family = AF_LINK; 1523 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1524 rtm_addrs |= RTA_IFP; 1525 } 1526 #endif /* SMALL */ 1527 } else 1528 cmd = RTM_DELETE; 1529 #define rtm m_rtmsg.m_rtm 1530 rtm.rtm_type = cmd; 1531 rtm.rtm_flags = flags; 1532 rtm.rtm_version = RTM_VERSION; 1533 rtm.rtm_seq = ++seq; 1534 rtm.rtm_addrs = rtm_addrs; 1535 rtm.rtm_rmx = rt_metrics; 1536 rtm.rtm_inits = rtm_inits; 1537 1538 if (rtm_addrs & RTA_NETMASK) 1539 mask_addr(); 1540 NEXTADDR(RTA_DST, so_dst); 1541 NEXTADDR(RTA_GATEWAY, so_gate); 1542 NEXTADDR(RTA_NETMASK, so_mask); 1543 NEXTADDR(RTA_GENMASK, so_genmask); 1544 NEXTADDR(RTA_IFP, so_ifp); 1545 NEXTADDR(RTA_IFA, so_ifa); 1546 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1547 if (verbose && ! shortoutput) 1548 print_rtmsg(&rtm, l); 1549 if (debugonly) 1550 return (0); 1551 if ((rlen = write(sock, (char *)&m_rtmsg, l)) < 0) { 1552 perror("writing to routing socket"); 1553 return (-1); 1554 } 1555 #ifndef SMALL 1556 if (cmd == RTM_GET) { 1557 do { 1558 l = read(sock, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1559 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1560 if (l < 0) 1561 err(1, "read from routing socket"); 1562 else 1563 print_getmsg(&rtm, l); 1564 } 1565 #endif /* SMALL */ 1566 #undef rtm 1567 return (0); 1568 } 1569 1570 static void 1571 mask_addr() 1572 { 1573 int olen = so_mask.sa.sa_len; 1574 char *cp1 = olen + (char *)&so_mask, *cp2; 1575 1576 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1577 if (*--cp1 != 0) { 1578 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1579 break; 1580 } 1581 if ((rtm_addrs & RTA_DST) == 0) 1582 return; 1583 switch (so_dst.sa.sa_family) { 1584 case AF_INET: 1585 #ifdef INET6 1586 case AF_INET6: 1587 #endif 1588 case AF_APPLETALK: 1589 #ifndef SMALL 1590 case AF_NS: 1591 case AF_CCITT: 1592 #endif /* SMALL */ 1593 case 0: 1594 return; 1595 #ifndef SMALL 1596 case AF_ISO: 1597 olen = MIN(so_dst.siso.siso_nlen, 1598 MAX(so_mask.sa.sa_len - 6, 0)); 1599 break; 1600 #endif /* SMALL */ 1601 } 1602 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1603 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1604 while (cp2 > cp1) 1605 *--cp2 = 0; 1606 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1607 while (cp1 > so_dst.sa.sa_data) 1608 *--cp1 &= *--cp2; 1609 #ifndef SMALL 1610 switch (so_dst.sa.sa_family) { 1611 case AF_ISO: 1612 so_dst.siso.siso_nlen = olen; 1613 break; 1614 } 1615 #endif /* SMALL */ 1616 } 1617 1618 char *msgtypes[] = { 1619 "", 1620 "RTM_ADD: Add Route", 1621 "RTM_DELETE: Delete Route", 1622 "RTM_CHANGE: Change Metrics or flags", 1623 "RTM_GET: Report Metrics", 1624 "RTM_LOSING: Kernel Suspects Partitioning", 1625 "RTM_REDIRECT: Told to use different route", 1626 "RTM_MISS: Lookup failed on this address", 1627 "RTM_LOCK: fix specified metrics", 1628 "RTM_OLDADD: caused by SIOCADDRT", 1629 "RTM_OLDDEL: caused by SIOCDELRT", 1630 "RTM_RESOLVE: Route created by cloning", 1631 "RTM_NEWADDR: address being added to iface", 1632 "RTM_DELADDR: address being removed from iface", 1633 "RTM_OIFINFO: iface status change (pre-1.5)", 1634 "RTM_IFINFO: iface status change", 1635 "RTM_IFANNOUNCE: iface arrival/departure", 1636 0, 1637 }; 1638 1639 char metricnames[] = 1640 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 1641 char routeflags[] = 1642 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016CLONED\017PROTO2\020PROTO1"; 1643 char ifnetflags[] = 1644 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST"; 1645 char addrnames[] = 1646 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1647 1648 1649 #ifndef SMALL 1650 static const char * 1651 linkstate(ifm) 1652 struct if_msghdr *ifm; 1653 { 1654 static char buf[64]; 1655 1656 switch (ifm->ifm_data.ifi_link_state) { 1657 case LINK_STATE_UNKNOWN: 1658 return "carrier: unknown"; 1659 case LINK_STATE_DOWN: 1660 return "carrier: no carrier"; 1661 case LINK_STATE_UP: 1662 return "carrier: active"; 1663 default: 1664 (void)snprintf(buf, sizeof(buf), "carrier: 0x%x", 1665 ifm->ifm_data.ifi_link_state); 1666 return buf; 1667 } 1668 } 1669 #endif /* SMALL */ 1670 1671 static void 1672 print_rtmsg(rtm, msglen) 1673 struct rt_msghdr *rtm; 1674 int msglen; 1675 { 1676 struct if_msghdr *ifm; 1677 struct ifa_msghdr *ifam; 1678 struct if_announcemsghdr *ifan; 1679 1680 if (verbose == 0) 1681 return; 1682 if (rtm->rtm_version != RTM_VERSION) { 1683 (void) printf("routing message version %d not understood\n", 1684 rtm->rtm_version); 1685 return; 1686 } 1687 if (msgtypes[rtm->rtm_type]) 1688 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1689 else 1690 (void)printf("#%d: ", rtm->rtm_type); 1691 (void)printf("len %d, ", rtm->rtm_msglen); 1692 switch (rtm->rtm_type) { 1693 case RTM_IFINFO: 1694 ifm = (struct if_msghdr *)rtm; 1695 (void) printf("if# %d, %s, flags:", ifm->ifm_index, 1696 #ifdef SMALL 1697 "" 1698 #else 1699 linkstate(ifm) 1700 #endif /* SMALL */ 1701 ); 1702 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1703 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1704 break; 1705 case RTM_NEWADDR: 1706 case RTM_DELADDR: 1707 ifam = (struct ifa_msghdr *)rtm; 1708 (void) printf("metric %d, flags:", ifam->ifam_metric); 1709 bprintf(stdout, ifam->ifam_flags, routeflags); 1710 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1711 break; 1712 case RTM_IFANNOUNCE: 1713 ifan = (struct if_announcemsghdr *)rtm; 1714 (void) printf("if# %d, what: ", ifan->ifan_index); 1715 switch (ifan->ifan_what) { 1716 case IFAN_ARRIVAL: 1717 printf("arrival"); 1718 break; 1719 case IFAN_DEPARTURE: 1720 printf("departure"); 1721 break; 1722 default: 1723 printf("#%d", ifan->ifan_what); 1724 break; 1725 } 1726 printf("\n"); 1727 break; 1728 default: 1729 (void) printf("pid: %d, seq %d, errno %d, flags:", 1730 rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1731 bprintf(stdout, rtm->rtm_flags, routeflags); 1732 pmsg_common(rtm); 1733 } 1734 } 1735 1736 #ifndef SMALL 1737 static void 1738 print_getmsg(rtm, msglen) 1739 struct rt_msghdr *rtm; 1740 int msglen; 1741 { 1742 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL, *ifa = NULL; 1743 struct sockaddr_dl *ifp = NULL; 1744 struct sockaddr *sa; 1745 char *cp; 1746 int i; 1747 1748 if (! shortoutput) 1749 (void) printf(" route to: %s\n", 1750 routename((struct sockaddr *) &so_dst, NULL, RTF_HOST)); 1751 if (rtm->rtm_version != RTM_VERSION) { 1752 warnx("routing message version %d not understood", 1753 rtm->rtm_version); 1754 return; 1755 } 1756 if (rtm->rtm_msglen > msglen) { 1757 warnx("message length mismatch, in packet %d, returned %d", 1758 rtm->rtm_msglen, msglen); 1759 } 1760 if (rtm->rtm_errno) { 1761 warn("RTM_GET"); 1762 return; 1763 } 1764 cp = ((char *)(rtm + 1)); 1765 if (rtm->rtm_addrs) 1766 for (i = 1; i; i <<= 1) 1767 if (i & rtm->rtm_addrs) { 1768 sa = (struct sockaddr *)cp; 1769 switch (i) { 1770 case RTA_DST: 1771 dst = sa; 1772 break; 1773 case RTA_GATEWAY: 1774 gate = sa; 1775 break; 1776 case RTA_NETMASK: 1777 mask = sa; 1778 break; 1779 case RTA_IFP: 1780 if (sa->sa_family == AF_LINK && 1781 ((struct sockaddr_dl *)sa)->sdl_nlen) 1782 ifp = (struct sockaddr_dl *)sa; 1783 break; 1784 case RTA_IFA: 1785 ifa = sa; 1786 break; 1787 } 1788 ADVANCE(cp, sa); 1789 } 1790 if (dst && mask) 1791 mask->sa_family = dst->sa_family; /* XXX */ 1792 if (dst && ! shortoutput) 1793 (void)printf("destination: %s\n", 1794 routename(dst, mask, RTF_HOST)); 1795 if (mask && ! shortoutput) { 1796 int savenflag = nflag; 1797 1798 nflag = 1; 1799 (void)printf(" mask: %s\n", 1800 routename(mask, NULL, RTF_HOST)); 1801 nflag = savenflag; 1802 } 1803 if (gate && rtm->rtm_flags & RTF_GATEWAY && ! shortoutput) 1804 (void)printf(" gateway: %s\n", 1805 routename(gate, NULL, RTF_HOST)); 1806 if (ifa && ! shortoutput) 1807 (void)printf(" local addr: %s\n", 1808 routename(ifa, NULL, RTF_HOST)); 1809 if (ifp && ! shortoutput) 1810 (void)printf(" interface: %.*s\n", 1811 ifp->sdl_nlen, ifp->sdl_data); 1812 if (! shortoutput) { 1813 (void)printf(" flags: "); 1814 bprintf(stdout, rtm->rtm_flags, routeflags); 1815 } 1816 1817 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1818 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1819 1820 if (! shortoutput) { 1821 (void) printf("\n%s\n", "\ 1822 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1823 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1824 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1825 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1826 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1827 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1828 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1829 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1830 if (rtm->rtm_rmx.rmx_expire) 1831 rtm->rtm_rmx.rmx_expire -= time(0); 1832 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1833 } 1834 #undef lock 1835 #undef msec 1836 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1837 1838 if ((rtm->rtm_addrs & RTF_GATEWAY) == 0) 1839 rv = 1; 1840 else { 1841 char *name; 1842 int addrs; 1843 1844 cp = (char *)(rtm + 1); 1845 addrs = rtm->rtm_addrs; 1846 1847 for (i = 1; i; i <<= 1) { 1848 sa = (struct sockaddr *)cp; 1849 if (i == RTF_GATEWAY) { 1850 name = routename(sa, NULL, RTF_HOST); 1851 if (name[0] == '\0') 1852 rv = 1; 1853 else if (shortoutput) 1854 printf("%s\n", name); 1855 } 1856 if (i & addrs) 1857 ADVANCE(cp, sa); 1858 } 1859 } 1860 1861 if (shortoutput) 1862 return; 1863 else if (verbose) 1864 pmsg_common(rtm); 1865 else if (rtm->rtm_addrs &~ RTA_IGN) { 1866 (void) printf("sockaddrs: "); 1867 bprintf(stdout, rtm->rtm_addrs, addrnames); 1868 putchar('\n'); 1869 } 1870 #undef RTA_IGN 1871 } 1872 #endif /* SMALL */ 1873 1874 void 1875 pmsg_common(rtm) 1876 struct rt_msghdr *rtm; 1877 { 1878 (void) printf("\nlocks: "); 1879 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1880 (void) printf(" inits: "); 1881 bprintf(stdout, rtm->rtm_inits, metricnames); 1882 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1883 } 1884 1885 static void 1886 pmsg_addrs(cp, addrs) 1887 char *cp; 1888 int addrs; 1889 { 1890 struct sockaddr *sa; 1891 int i; 1892 1893 if (addrs != 0) { 1894 (void) printf("\nsockaddrs: "); 1895 bprintf(stdout, addrs, addrnames); 1896 (void) putchar('\n'); 1897 for (i = 1; i; i <<= 1) 1898 if (i & addrs) { 1899 sa = (struct sockaddr *)cp; 1900 (void) printf(" %s", 1901 routename(sa, NULL, RTF_HOST)); 1902 ADVANCE(cp, sa); 1903 } 1904 } 1905 (void) putchar('\n'); 1906 (void) fflush(stdout); 1907 } 1908 1909 static void 1910 bprintf(fp, b, s) 1911 FILE *fp; 1912 int b; 1913 u_char *s; 1914 { 1915 int i; 1916 int gotsome = 0; 1917 1918 if (b == 0) 1919 return; 1920 while ((i = *s++) != 0) { 1921 if (b & (1 << (i-1))) { 1922 if (gotsome == 0) 1923 i = '<'; 1924 else 1925 i = ','; 1926 (void) putc(i, fp); 1927 gotsome = 1; 1928 for (; (i = *s) > 32; s++) 1929 (void) putc(i, fp); 1930 } else 1931 while (*s > 32) 1932 s++; 1933 } 1934 if (gotsome) 1935 (void) putc('>', fp); 1936 } 1937 1938 static int 1939 keyword(cp) 1940 char *cp; 1941 { 1942 struct keytab *kt = keywords; 1943 1944 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1945 kt++; 1946 return kt->kt_i; 1947 } 1948 1949 static void 1950 sodump(su, which) 1951 sup su; 1952 char *which; 1953 { 1954 #ifdef INET6 1955 char ntop_buf[NI_MAXHOST]; 1956 #endif 1957 1958 switch (su->sa.sa_family) { 1959 case AF_INET: 1960 (void) printf("%s: inet %s; ", 1961 which, inet_ntoa(su->sin.sin_addr)); 1962 break; 1963 case AF_APPLETALK: 1964 (void) printf("%s: atalk %d.%d; ", 1965 which, su->sat.sat_addr.s_net, su->sat.sat_addr.s_node); 1966 break; 1967 case AF_LINK: 1968 (void) printf("%s: link %s; ", 1969 which, link_ntoa(&su->sdl)); 1970 break; 1971 #ifndef SMALL 1972 #ifdef INET6 1973 case AF_INET6: 1974 (void) printf("%s: inet6 %s; ", 1975 which, inet_ntop(AF_INET6, &su->sin6.sin6_addr, 1976 ntop_buf, sizeof(ntop_buf))); 1977 break; 1978 #endif 1979 case AF_ISO: 1980 (void) printf("%s: iso %s; ", 1981 which, iso_ntoa(&su->siso.siso_addr)); 1982 break; 1983 case AF_NS: 1984 (void) printf("%s: xns %s; ", 1985 which, ns_ntoa(su->sns.sns_addr)); 1986 break; 1987 #endif /* SMALL */ 1988 default: 1989 (void) printf("af %p: %s; ", 1990 which, any_ntoa(&su->sa)); 1991 } 1992 (void) fflush(stdout); 1993 } 1994 1995 /* States*/ 1996 #define VIRGIN 0 1997 #define GOTONE 1 1998 #define GOTTWO 2 1999 /* Inputs */ 2000 #define DIGIT (4*0) 2001 #define END (4*1) 2002 #define DELIM (4*2) 2003 2004 static void 2005 sockaddr(addr, sa) 2006 char *addr; 2007 struct sockaddr *sa; 2008 { 2009 char *cp = (char *)sa; 2010 int size = sa->sa_len; 2011 char *cplim = cp + size; 2012 int byte = 0, state = VIRGIN, new = 0; 2013 2014 (void) memset(cp, 0, size); 2015 cp++; 2016 do { 2017 if ((*addr >= '0') && (*addr <= '9')) { 2018 new = *addr - '0'; 2019 } else if ((*addr >= 'a') && (*addr <= 'f')) { 2020 new = *addr - 'a' + 10; 2021 } else if ((*addr >= 'A') && (*addr <= 'F')) { 2022 new = *addr - 'A' + 10; 2023 } else if (*addr == 0) 2024 state |= END; 2025 else 2026 state |= DELIM; 2027 addr++; 2028 switch (state /* | INPUT */) { 2029 case GOTTWO | DIGIT: 2030 *cp++ = byte; /*FALLTHROUGH*/ 2031 case VIRGIN | DIGIT: 2032 state = GOTONE; byte = new; continue; 2033 case GOTONE | DIGIT: 2034 state = GOTTWO; byte = new + (byte << 4); continue; 2035 default: /* | DELIM */ 2036 state = VIRGIN; *cp++ = byte; byte = 0; continue; 2037 case GOTONE | END: 2038 case GOTTWO | END: 2039 *cp++ = byte; /* FALLTHROUGH */ 2040 case VIRGIN | END: 2041 break; 2042 } 2043 break; 2044 } while (cp < cplim); 2045 sa->sa_len = cp - (char *)sa; 2046 } 2047
Indexes created Mon Sep 29 03:10:08 GMT 2025