route.c revision 1.61
1 /* $NetBSD: route.c,v 1.61 2002/10/18 00:21:23 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 1.61 2002/10/18 00:21:23 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)strncpy(domain, cp + 1, sizeof(domain) - 1); 494 domain[sizeof(domain) - 1] = '\0'; 495 } else 496 domain[0] = 0; 497 } 498 499 if (sa->sa_len == 0) { 500 strncpy(line, "default", sizeof(line) - 1); 501 line[sizeof(line) - 1] = '\0'; 502 } else switch (sa->sa_family) { 503 504 case AF_INET: 505 in = ((struct sockaddr_in *)sa)->sin_addr; 506 nml = netmask_length(nm, AF_INET); 507 508 cp = 0; 509 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) { 510 if (nml == 0) 511 cp = "default"; 512 else { 513 static char notdefault[sizeof(NOTDEFSTRING)]; 514 515 snprintf(notdefault, sizeof(notdefault), 516 "0.0.0.0/%s", netmask_string(nm, nml)); 517 cp = notdefault; 518 } 519 } 520 if (cp == 0 && !nflag) { 521 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 522 AF_INET); 523 if (hp) { 524 if ((cp = strchr(hp->h_name, '.')) && 525 !strcmp(cp + 1, domain)) 526 *cp = 0; 527 cp = hp->h_name; 528 } 529 } 530 if (cp) 531 (void)strncpy(line, cp, sizeof(line) - 1); 532 else 533 (void)strncpy(line, inet_ntoa(in), sizeof(line) - 1); 534 line[sizeof(line) - 1] = '\0'; 535 break; 536 537 case AF_LINK: 538 return (link_ntoa((struct sockaddr_dl *)sa)); 539 540 #ifndef SMALL 541 #ifdef INET6 542 case AF_INET6: 543 { 544 struct sockaddr_in6 sin6; 545 int niflags; 546 547 #ifdef NI_WITHSCOPEID 548 niflags = NI_WITHSCOPEID; 549 #else 550 niflags = 0; 551 #endif 552 if (nflag) 553 niflags |= NI_NUMERICHOST; 554 memset(&sin6, 0, sizeof(sin6)); 555 memcpy(&sin6, sa, sa->sa_len); 556 sin6.sin6_len = sizeof(struct sockaddr_in6); 557 sin6.sin6_family = AF_INET6; 558 #ifdef __KAME__ 559 if (sa->sa_len == sizeof(struct sockaddr_in6) && 560 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 561 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 562 sin6.sin6_scope_id == 0) { 563 sin6.sin6_scope_id = 564 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 565 sin6.sin6_addr.s6_addr[2] = 0; 566 sin6.sin6_addr.s6_addr[3] = 0; 567 } 568 #endif 569 nml = netmask_length(nm, AF_INET6); 570 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 571 if (nml == 0) { 572 strncpy(line, "::", sizeof(line) - 1); 573 line[sizeof(line) - 1] = '\0'; 574 } 575 else 576 /* noncontiguous never happens in ipv6 */ 577 snprintf(line, sizeof(line), "::/%d", nml); 578 } 579 580 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 581 line, sizeof(line), NULL, 0, niflags) != 0) 582 strncpy(line, "invalid", sizeof(line)); 583 break; 584 } 585 #endif 586 587 case AF_NS: 588 return (ns_print((struct sockaddr_ns *)sa)); 589 590 case AF_ISO: 591 (void)snprintf(line, sizeof line, "iso %s", 592 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 593 break; 594 #endif /* SMALL */ 595 596 case AF_APPLETALK: 597 (void) snprintf(line, sizeof(line), "atalk %d.%d", 598 ((struct sockaddr_at *)sa)->sat_addr.s_net, 599 ((struct sockaddr_at *)sa)->sat_addr.s_node); 600 break; 601 602 default: 603 (void)snprintf(line, sizeof line, "(%d) %s", 604 sa->sa_family, any_ntoa(sa)); 605 break; 606 607 } 608 return (line); 609 } 610 611 /* 612 * Return the name of the network whose address is given. 613 * The address is assumed to be that of a net or subnet, not a host. 614 */ 615 char * 616 netname(sa, nm) 617 struct sockaddr *sa, *nm; 618 { 619 char *cp = 0; 620 static char line[50]; 621 struct netent *np = 0; 622 u_int32_t net, mask; 623 u_int32_t i; 624 int subnetshift, nml; 625 struct in_addr in; 626 627 switch (sa->sa_family) { 628 629 case AF_INET: 630 in = ((struct sockaddr_in *)sa)->sin_addr; 631 i = ntohl(in.s_addr); 632 nml = netmask_length(nm, AF_INET); 633 if (i == 0) { 634 if (nml == 0) 635 cp = "default"; 636 else { 637 static char notdefault[sizeof(NOTDEFSTRING)]; 638 639 snprintf(notdefault, sizeof(notdefault), 640 "0.0.0.0/%s", netmask_string(nm, nml)); 641 cp = notdefault; 642 } 643 } 644 else if (!nflag) { 645 if (IN_CLASSA(i)) { 646 mask = IN_CLASSA_NET; 647 subnetshift = 8; 648 } else if (IN_CLASSB(i)) { 649 mask = IN_CLASSB_NET; 650 subnetshift = 8; 651 } else { 652 mask = IN_CLASSC_NET; 653 subnetshift = 4; 654 } 655 /* 656 * If there are more bits than the standard mask 657 * would suggest, subnets must be in use. 658 * Guess at the subnet mask, assuming reasonable 659 * width subnet fields. 660 */ 661 while (i &~ mask) 662 mask = (int32_t)mask >> subnetshift; 663 net = i & mask; 664 while ((mask & 1) == 0) 665 mask >>= 1, net >>= 1; 666 np = getnetbyaddr(net, AF_INET); 667 if (np) 668 cp = np->n_name; 669 } 670 if (cp) { 671 (void)strncpy(line, cp, sizeof(line) - 1); 672 line[sizeof(line) - 1] = '\0'; 673 } else { 674 #if 0 /* XXX - This is silly... */ 675 #define C(x) ((x) & 0xff) 676 if ((i & 0xffffff) == 0) 677 (void)snprintf(line, sizeof line, "%u", 678 C(i >> 24)); 679 else if ((i & 0xffff) == 0) 680 (void)snprintf(line, sizeof line, "%u.%u", 681 C(i >> 24), C(i >> 16)); 682 else if ((i & 0xff) == 0) 683 (void)snprintf(line, sizeof line, "%u.%u.%u", 684 C(i >> 24), C(i >> 16), C(i >> 8)); 685 else 686 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", 687 C(i >> 24), C(i >> 16), C(i >> 8), C(i)); 688 #undef C 689 #else /* XXX */ 690 (void)strncpy(line, inet_ntoa(in), sizeof(line) - 1); 691 #endif /* XXX */ 692 } 693 break; 694 695 case AF_LINK: 696 return (link_ntoa((struct sockaddr_dl *)sa)); 697 698 #ifndef SMALL 699 #ifdef INET6 700 case AF_INET6: 701 { 702 struct sockaddr_in6 sin6; 703 int niflags; 704 705 #ifdef NI_WITHSCOPEID 706 niflags = NI_WITHSCOPEID; 707 #else 708 niflags = 0; 709 #endif 710 if (nflag) 711 niflags |= NI_NUMERICHOST; 712 memset(&sin6, 0, sizeof(sin6)); 713 memcpy(&sin6, sa, sa->sa_len); 714 sin6.sin6_len = sizeof(struct sockaddr_in6); 715 sin6.sin6_family = AF_INET6; 716 #ifdef __KAME__ 717 if (sa->sa_len == sizeof(struct sockaddr_in6) && 718 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 719 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 720 sin6.sin6_scope_id == 0) { 721 sin6.sin6_scope_id = 722 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 723 sin6.sin6_addr.s6_addr[2] = 0; 724 sin6.sin6_addr.s6_addr[3] = 0; 725 } 726 #endif 727 nml = netmask_length(nm, AF_INET6); 728 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 729 if (nml == 0) { 730 strncpy(line, "::", sizeof(line) - 1); 731 line[sizeof(line) - 1] = '\0'; 732 } 733 else 734 /* noncontiguous never happens in ipv6 */ 735 snprintf(line, sizeof(line), "::/%d", nml); 736 } 737 738 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 739 line, sizeof(line), NULL, 0, niflags) != 0) 740 strncpy(line, "invalid", sizeof(line)); 741 break; 742 } 743 #endif 744 745 case AF_NS: 746 return (ns_print((struct sockaddr_ns *)sa)); 747 748 case AF_ISO: 749 (void)snprintf(line, sizeof line, "iso %s", 750 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 751 break; 752 #endif /* SMALL */ 753 754 case AF_APPLETALK: 755 (void) snprintf(line, sizeof(line), "atalk %d.%d", 756 ((struct sockaddr_at *)sa)->sat_addr.s_net, 757 ((struct sockaddr_at *)sa)->sat_addr.s_node); 758 break; 759 760 default: 761 (void)snprintf(line, sizeof line, "af %d: %s", 762 sa->sa_family, any_ntoa(sa)); 763 break; 764 } 765 return (line); 766 } 767 768 static void 769 set_metric(value, key) 770 char *value; 771 int key; 772 { 773 int flag = 0; 774 u_long noval, *valp = &noval; 775 776 switch (key) { 777 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 778 caseof(K_MTU, RTV_MTU, rmx_mtu); 779 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 780 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 781 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 782 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 783 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 784 caseof(K_RTT, RTV_RTT, rmx_rtt); 785 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 786 } 787 rtm_inits |= flag; 788 if (lockrest || locking) 789 rt_metrics.rmx_locks |= flag; 790 if (locking) 791 locking = 0; 792 *valp = atoi(value); 793 } 794 795 static int 796 newroute(argc, argv) 797 int argc; 798 char **argv; 799 { 800 char *cmd, *dest = "", *gateway = ""; 801 const char *error; 802 int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC; 803 int key; 804 struct hostent *hp = 0; 805 806 cmd = argv[0]; 807 af = 0; 808 if (*cmd != 'g') 809 shutdown(sock, SHUT_RD); /* Don't want to read back our messages */ 810 while (--argc > 0) { 811 if (**(++argv)== '-') { 812 switch (key = keyword(1 + *argv)) { 813 814 case K_SA: 815 af = PF_ROUTE; 816 aflen = sizeof(union sockunion); 817 break; 818 819 case K_ATALK: 820 af = AF_APPLETALK; 821 aflen = sizeof(struct sockaddr_at); 822 break; 823 824 case K_INET: 825 af = AF_INET; 826 aflen = sizeof(struct sockaddr_in); 827 break; 828 829 #ifdef INET6 830 case K_INET6: 831 af = AF_INET6; 832 aflen = sizeof(struct sockaddr_in6); 833 break; 834 #endif 835 836 case K_LINK: 837 af = AF_LINK; 838 aflen = sizeof(struct sockaddr_dl); 839 break; 840 841 #ifndef SMALL 842 case K_OSI: 843 case K_ISO: 844 af = AF_ISO; 845 aflen = sizeof(struct sockaddr_iso); 846 break; 847 848 case K_X25: 849 af = AF_CCITT; 850 aflen = sizeof(struct sockaddr_x25); 851 break; 852 853 case K_XNS: 854 af = AF_NS; 855 aflen = sizeof(struct sockaddr_ns); 856 break; 857 #endif /* SMALL */ 858 859 case K_IFACE: 860 case K_INTERFACE: 861 iflag++; 862 break; 863 case K_NOSTATIC: 864 flags &= ~RTF_STATIC; 865 break; 866 case K_LLINFO: 867 flags |= RTF_LLINFO; 868 break; 869 case K_LOCK: 870 locking = 1; 871 break; 872 case K_LOCKREST: 873 lockrest = 1; 874 break; 875 case K_HOST: 876 forcehost++; 877 break; 878 case K_REJECT: 879 flags |= RTF_REJECT; 880 break; 881 case K_BLACKHOLE: 882 flags |= RTF_BLACKHOLE; 883 break; 884 case K_CLONED: 885 flags |= RTF_CLONED; 886 break; 887 case K_PROTO1: 888 flags |= RTF_PROTO1; 889 break; 890 case K_PROTO2: 891 flags |= RTF_PROTO2; 892 break; 893 case K_CLONING: 894 flags |= RTF_CLONING; 895 break; 896 case K_XRESOLVE: 897 flags |= RTF_XRESOLVE; 898 break; 899 case K_STATIC: 900 flags |= RTF_STATIC; 901 break; 902 case K_IFA: 903 if (!--argc) 904 usage(1+*argv); 905 (void) getaddr(RTA_IFA, *++argv, 0); 906 break; 907 case K_IFP: 908 if (!--argc) 909 usage(1+*argv); 910 (void) getaddr(RTA_IFP, *++argv, 0); 911 break; 912 case K_GENMASK: 913 if (!--argc) 914 usage(1+*argv); 915 (void) getaddr(RTA_GENMASK, *++argv, 0); 916 break; 917 case K_GATEWAY: 918 if (!--argc) 919 usage(1+*argv); 920 (void) getaddr(RTA_GATEWAY, *++argv, 0); 921 break; 922 case K_DST: 923 if (!--argc) 924 usage(1+*argv); 925 ishost = getaddr(RTA_DST, *++argv, &hp); 926 dest = *argv; 927 break; 928 case K_NETMASK: 929 if (!--argc) 930 usage(1+*argv); 931 (void) getaddr(RTA_NETMASK, *++argv, 0); 932 /* FALLTHROUGH */ 933 case K_NET: 934 forcenet++; 935 break; 936 case K_PREFIXLEN: 937 if (!--argc) 938 usage(1+*argv); 939 ishost = prefixlen(*++argv); 940 break; 941 case K_MTU: 942 case K_HOPCOUNT: 943 case K_EXPIRE: 944 case K_RECVPIPE: 945 case K_SENDPIPE: 946 case K_SSTHRESH: 947 case K_RTT: 948 case K_RTTVAR: 949 if (!--argc) 950 usage(1+*argv); 951 set_metric(*++argv, key); 952 break; 953 default: 954 usage(1+*argv); 955 } 956 } else { 957 if ((rtm_addrs & RTA_DST) == 0) { 958 dest = *argv; 959 ishost = getaddr(RTA_DST, *argv, &hp); 960 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 961 gateway = *argv; 962 (void) getaddr(RTA_GATEWAY, *argv, &hp); 963 } else { 964 ret = atoi(*argv); 965 966 if (ret == 0) { 967 if (!qflag && strcmp(*argv, "0") == 0) 968 warnx("%s, %s", 969 "old usage of trailing 0", 970 "assuming route to if"); 971 else 972 usage((char *)NULL); 973 iflag = 1; 974 continue; 975 } else if (ret > 0 && ret < 10) { 976 if (!qflag) { 977 warnx("%s, %s", 978 "old usage of trailing digit", 979 "assuming route via gateway"); 980 } 981 iflag = 0; 982 continue; 983 } 984 (void) getaddr(RTA_NETMASK, *argv, 0); 985 } 986 } 987 } 988 if (forcehost) 989 ishost = 1; 990 if (forcenet) 991 ishost = 0; 992 flags |= RTF_UP; 993 if (ishost) 994 flags |= RTF_HOST; 995 if (iflag == 0) 996 flags |= RTF_GATEWAY; 997 for (attempts = 1; ; attempts++) { 998 errno = 0; 999 if ((ret = rtmsg(*cmd, flags)) == 0) 1000 break; 1001 if (errno != ENETUNREACH && errno != ESRCH) 1002 break; 1003 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 1004 hp->h_addr_list++; 1005 memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0], 1006 hp->h_length); 1007 } else 1008 break; 1009 } 1010 if (*cmd == 'g') 1011 return rv; 1012 oerrno = errno; 1013 if (!qflag) { 1014 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 1015 if (*gateway) { 1016 (void) printf(": gateway %s", gateway); 1017 if (attempts > 1 && ret == 0 && af == AF_INET) 1018 (void) printf(" (%s)", 1019 inet_ntoa(so_gate.sin.sin_addr)); 1020 } 1021 if (ret == 0) 1022 (void) printf("\n"); 1023 } 1024 if (ret != 0) { 1025 switch (oerrno) { 1026 case ESRCH: 1027 error = "not in table"; 1028 break; 1029 case EBUSY: 1030 error = "entry in use"; 1031 break; 1032 case ENOBUFS: 1033 error = "routing table overflow"; 1034 break; 1035 default: 1036 error = strerror(oerrno); 1037 break; 1038 } 1039 (void) printf(": %s\n", error); 1040 return 1; 1041 } 1042 return 0; 1043 } 1044 1045 static void 1046 inet_makenetandmask(net, isin) 1047 u_int32_t net; 1048 struct sockaddr_in *isin; 1049 { 1050 u_int32_t addr, mask = 0; 1051 char *cp; 1052 1053 rtm_addrs |= RTA_NETMASK; 1054 if (net == 0) 1055 mask = addr = 0; 1056 else if (net < 128) { 1057 addr = net << IN_CLASSA_NSHIFT; 1058 mask = IN_CLASSA_NET; 1059 } else if (net < 65536) { 1060 addr = net << IN_CLASSB_NSHIFT; 1061 mask = IN_CLASSB_NET; 1062 } else if (net < 16777216L) { 1063 addr = net << IN_CLASSC_NSHIFT; 1064 mask = IN_CLASSC_NET; 1065 } else { 1066 addr = net; 1067 if ((addr & IN_CLASSA_HOST) == 0) 1068 mask = IN_CLASSA_NET; 1069 else if ((addr & IN_CLASSB_HOST) == 0) 1070 mask = IN_CLASSB_NET; 1071 else if ((addr & IN_CLASSC_HOST) == 0) 1072 mask = IN_CLASSC_NET; 1073 else 1074 mask = -1; 1075 } 1076 isin->sin_addr.s_addr = htonl(addr); 1077 isin = &so_mask.sin; 1078 isin->sin_addr.s_addr = htonl(mask); 1079 isin->sin_len = 0; 1080 isin->sin_family = 0; 1081 cp = (char *)(&isin->sin_addr + 1); 1082 while (*--cp == 0 && cp > (char *)isin) 1083 ; 1084 isin->sin_len = 1 + cp - (char *)isin; 1085 } 1086 1087 #ifdef INET6 1088 /* 1089 * XXX the function may need more improvement... 1090 */ 1091 static int 1092 inet6_makenetandmask(sin6) 1093 struct sockaddr_in6 *sin6; 1094 { 1095 char *plen; 1096 struct in6_addr in6; 1097 1098 plen = NULL; 1099 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1100 sin6->sin6_scope_id == 0) { 1101 plen = "0"; 1102 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1103 /* aggregatable global unicast - RFC2374 */ 1104 memset(&in6, 0, sizeof(in6)); 1105 if (!memcmp(&sin6->sin6_addr.s6_addr[8], &in6.s6_addr[8], 8)) 1106 plen = "64"; 1107 } 1108 1109 if (!plen || strcmp(plen, "128") == 0) 1110 return 1; 1111 else { 1112 rtm_addrs |= RTA_NETMASK; 1113 (void)prefixlen(plen); 1114 return 0; 1115 } 1116 } 1117 #endif 1118 1119 /* 1120 * Interpret an argument as a network address of some kind, 1121 * returning 1 if a host address, 0 if a network address. 1122 */ 1123 static int 1124 getaddr(which, s, hpp) 1125 int which; 1126 char *s; 1127 struct hostent **hpp; 1128 { 1129 sup su; 1130 struct hostent *hp; 1131 struct netent *np; 1132 u_int32_t val; 1133 char *t; 1134 int afamily; /* local copy of af so we can change it */ 1135 1136 if (af == 0) { 1137 af = AF_INET; 1138 aflen = sizeof(struct sockaddr_in); 1139 } 1140 afamily = af; 1141 rtm_addrs |= which; 1142 switch (which) { 1143 case RTA_DST: 1144 su = &so_dst; 1145 break; 1146 case RTA_GATEWAY: 1147 su = &so_gate; 1148 break; 1149 case RTA_NETMASK: 1150 su = &so_mask; 1151 break; 1152 case RTA_GENMASK: 1153 su = &so_genmask; 1154 break; 1155 case RTA_IFP: 1156 su = &so_ifp; 1157 afamily = AF_LINK; 1158 break; 1159 case RTA_IFA: 1160 su = &so_ifa; 1161 su->sa.sa_family = af; 1162 break; 1163 default: 1164 su = NULL; 1165 usage("Internal Error"); 1166 /*NOTREACHED*/ 1167 } 1168 su->sa.sa_len = aflen; 1169 su->sa.sa_family = afamily; /* cases that don't want it have left already */ 1170 if (strcmp(s, "default") == 0) { 1171 switch (which) { 1172 case RTA_DST: 1173 forcenet++; 1174 (void) getaddr(RTA_NETMASK, s, 0); 1175 break; 1176 case RTA_NETMASK: 1177 case RTA_GENMASK: 1178 su->sa.sa_len = 0; 1179 } 1180 return (0); 1181 } 1182 switch (afamily) { 1183 #ifndef SMALL 1184 #ifdef INET6 1185 case AF_INET6: 1186 { 1187 struct addrinfo hints, *res; 1188 1189 memset(&hints, 0, sizeof(hints)); 1190 hints.ai_family = afamily; /*AF_INET6*/ 1191 hints.ai_flags = AI_NUMERICHOST; 1192 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1193 if (getaddrinfo(s, "0", &hints, &res) != 0) { 1194 hints.ai_flags = 0; 1195 if (getaddrinfo(s, "0", &hints, &res) != 0) { 1196 (void) fprintf(stderr, "%s: bad value\n", s); 1197 exit(1); 1198 } 1199 } 1200 if (sizeof(su->sin6) != res->ai_addrlen) { 1201 (void) fprintf(stderr, "%s: bad value\n", s); 1202 exit(1); 1203 } 1204 if (res->ai_next) { 1205 (void) fprintf(stderr, 1206 "%s: resolved to multiple values\n", s); 1207 exit(1); 1208 } 1209 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1210 freeaddrinfo(res); 1211 #ifdef __KAME__ 1212 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 1213 IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) && 1214 su->sin6.sin6_scope_id) { 1215 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 1216 htons(su->sin6.sin6_scope_id); 1217 su->sin6.sin6_scope_id = 0; 1218 } 1219 #endif 1220 if (hints.ai_flags == AI_NUMERICHOST) { 1221 if (which == RTA_DST) 1222 return (inet6_makenetandmask(&su->sin6)); 1223 return (0); 1224 } else 1225 return (1); 1226 } 1227 #endif 1228 1229 case AF_NS: 1230 if (which == RTA_DST) { 1231 struct sockaddr_ns *sms = &(so_mask.sns); 1232 memset(sms, 0, sizeof(*sms)); 1233 sms->sns_family = 0; 1234 sms->sns_len = 6; 1235 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 1236 rtm_addrs |= RTA_NETMASK; 1237 } 1238 su->sns.sns_addr = ns_addr(s); 1239 return (!ns_nullhost(su->sns.sns_addr)); 1240 1241 case AF_OSI: 1242 su->siso.siso_addr = *iso_addr(s); 1243 if (which == RTA_NETMASK || which == RTA_GENMASK) { 1244 char *cp = (char *)TSEL(&su->siso); 1245 su->siso.siso_nlen = 0; 1246 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 1247 su->siso.siso_len = 1 + cp - (char *)su; 1248 } 1249 return (1); 1250 1251 case AF_CCITT: 1252 ccitt_addr(s, &su->sx25); 1253 return (which == RTA_DST ? x25_makemask() : 1); 1254 #endif /* SMALL */ 1255 1256 case PF_ROUTE: 1257 su->sa.sa_len = sizeof(*su); 1258 sockaddr(s, &su->sa); 1259 return (1); 1260 1261 case AF_APPLETALK: 1262 t = strchr (s, '.'); 1263 if (!t) { 1264 badataddr: 1265 errx(1, "bad address: %s", s); 1266 } 1267 val = atoi (s); 1268 if (val > 65535) 1269 goto badataddr; 1270 su->sat.sat_addr.s_net = val; 1271 val = atoi (t); 1272 if (val > 256) 1273 goto badataddr; 1274 su->sat.sat_addr.s_node = val; 1275 rtm_addrs |= RTA_NETMASK; 1276 return(forcehost || su->sat.sat_addr.s_node != 0); 1277 1278 case AF_LINK: 1279 link_addr(s, &su->sdl); 1280 return (1); 1281 1282 case AF_INET: 1283 default: 1284 break; 1285 } 1286 1287 if (hpp == NULL) 1288 hpp = &hp; 1289 *hpp = NULL; 1290 if (((val = inet_addr(s)) != INADDR_NONE) && 1291 (which != RTA_DST || forcenet == 0)) { 1292 su->sin.sin_addr.s_addr = val; 1293 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1294 return (1); 1295 else { 1296 val = ntohl(val); 1297 goto netdone; 1298 } 1299 } 1300 if ((val = inet_network(s)) != INADDR_NONE || 1301 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) { 1302 netdone: 1303 if (which == RTA_DST) 1304 inet_makenetandmask(val, &su->sin); 1305 return (0); 1306 } 1307 hp = gethostbyname(s); 1308 if (hp) { 1309 *hpp = hp; 1310 su->sin.sin_family = hp->h_addrtype; 1311 memmove(&su->sin.sin_addr, hp->h_addr, hp->h_length); 1312 return (1); 1313 } 1314 errx(1, "bad value: %s", s); 1315 } 1316 1317 int 1318 prefixlen(s) 1319 char *s; 1320 { 1321 int len = atoi(s), q, r; 1322 int max; 1323 1324 switch (af) { 1325 case AF_INET: 1326 max = sizeof(struct in_addr) * 8; 1327 break; 1328 #ifdef INET6 1329 case AF_INET6: 1330 max = sizeof(struct in6_addr) * 8; 1331 break; 1332 #endif 1333 default: 1334 (void) fprintf(stderr, 1335 "prefixlen is not supported with af %d\n", af); 1336 exit(1); 1337 } 1338 1339 rtm_addrs |= RTA_NETMASK; 1340 if (len < -1 || len > max) { 1341 (void) fprintf(stderr, "%s: bad value\n", s); 1342 exit(1); 1343 } 1344 1345 q = len >> 3; 1346 r = len & 7; 1347 switch (af) { 1348 case AF_INET: 1349 memset(&so_mask, 0, sizeof(so_mask)); 1350 so_mask.sin.sin_family = AF_INET; 1351 so_mask.sin.sin_len = sizeof(struct sockaddr_in); 1352 so_mask.sin.sin_addr.s_addr = htonl(0xffffffff << (32 - len)); 1353 break; 1354 #ifdef INET6 1355 case AF_INET6: 1356 so_mask.sin6.sin6_family = AF_INET6; 1357 so_mask.sin6.sin6_len = sizeof(struct sockaddr_in6); 1358 memset((void *)&so_mask.sin6.sin6_addr, 0, 1359 sizeof(so_mask.sin6.sin6_addr)); 1360 if (q > 0) 1361 memset((void *)&so_mask.sin6.sin6_addr, 0xff, q); 1362 if (r > 0) 1363 *((u_char *)&so_mask.sin6.sin6_addr + q) = 1364 (0xff00 >> r) & 0xff; 1365 break; 1366 #endif 1367 } 1368 return (len == max); 1369 } 1370 1371 #ifndef SMALL 1372 int 1373 x25_makemask() 1374 { 1375 char *cp; 1376 1377 if ((rtm_addrs & RTA_NETMASK) == 0) { 1378 rtm_addrs |= RTA_NETMASK; 1379 for (cp = (char *)&so_mask.sx25.x25_net; 1380 cp < &so_mask.sx25.x25_opts.op_flags; cp++) 1381 *cp = -1; 1382 so_mask.sx25.x25_len = (u_char)&(((sup)0)->sx25.x25_opts); 1383 } 1384 return 0; 1385 } 1386 1387 1388 char * 1389 ns_print(sns) 1390 struct sockaddr_ns *sns; 1391 { 1392 struct ns_addr work; 1393 union { union ns_net net_e; u_int32_t int32_t_e; } net; 1394 u_short port; 1395 static char mybuf[50], cport[10], chost[25]; 1396 char *host = ""; 1397 char *p; 1398 u_char *q; 1399 1400 work = sns->sns_addr; 1401 port = ntohs(work.x_port); 1402 work.x_port = 0; 1403 net.net_e = work.x_net; 1404 if (ns_nullhost(work) && net.int32_t_e == 0) { 1405 if (!port) 1406 return ("*.*"); 1407 (void)snprintf(mybuf, sizeof mybuf, "*.%XH", port); 1408 return (mybuf); 1409 } 1410 1411 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) 1412 host = "any"; 1413 else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) 1414 host = "*"; 1415 else { 1416 q = work.x_host.c_host; 1417 (void)snprintf(chost, sizeof chost, "%02X%02X%02X%02X%02X%02XH", 1418 q[0], q[1], q[2], q[3], q[4], q[5]); 1419 for (p = chost; *p == '0' && p < chost + 12; p++) 1420 /* void */; 1421 host = p; 1422 } 1423 if (port) 1424 (void)snprintf(cport, sizeof cport, ".%XH", htons(port)); 1425 else 1426 *cport = 0; 1427 1428 (void)snprintf(mybuf, sizeof mybuf, "%XH.%s%s", 1429 (u_int32_t)ntohl(net.int32_t_e), host, cport); 1430 return (mybuf); 1431 } 1432 1433 static void 1434 interfaces() 1435 { 1436 size_t needed; 1437 int mib[6]; 1438 char *buf, *lim, *next; 1439 struct rt_msghdr *rtm; 1440 1441 mib[0] = CTL_NET; 1442 mib[1] = PF_ROUTE; 1443 mib[2] = 0; /* protocol */ 1444 mib[3] = 0; /* wildcard address family */ 1445 mib[4] = NET_RT_IFLIST; 1446 mib[5] = 0; /* no flags */ 1447 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1448 err(1, "route-sysctl-estimate"); 1449 if ((buf = malloc(needed)) == NULL) 1450 err(1, "malloc"); 1451 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 1452 err(1, "actual retrieval of interface table"); 1453 lim = buf + needed; 1454 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1455 rtm = (struct rt_msghdr *)next; 1456 print_rtmsg(rtm, rtm->rtm_msglen); 1457 } 1458 } 1459 1460 static void 1461 monitor() 1462 { 1463 int n; 1464 char msg[2048]; 1465 1466 verbose = 1; 1467 if (debugonly) { 1468 interfaces(); 1469 exit(0); 1470 } 1471 for(;;) { 1472 time_t now; 1473 n = read(sock, msg, 2048); 1474 now = time(NULL); 1475 (void) printf("got message of size %d on %s", n, ctime(&now)); 1476 print_rtmsg((struct rt_msghdr *)msg, n); 1477 } 1478 } 1479 1480 #endif /* SMALL */ 1481 1482 1483 struct { 1484 struct rt_msghdr m_rtm; 1485 char m_space[512]; 1486 } m_rtmsg; 1487 1488 static int 1489 rtmsg(cmd, flags) 1490 int cmd, flags; 1491 { 1492 static int seq; 1493 int rlen; 1494 char *cp = m_rtmsg.m_space; 1495 int l; 1496 1497 #define NEXTADDR(w, u) \ 1498 if (rtm_addrs & (w)) {\ 1499 l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\ 1500 if (verbose && ! shortoutput) sodump(&(u),"u");\ 1501 } 1502 1503 errno = 0; 1504 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1505 if (cmd == 'a') 1506 cmd = RTM_ADD; 1507 else if (cmd == 'c') 1508 cmd = RTM_CHANGE; 1509 else if (cmd == 'g') { 1510 #ifdef SMALL 1511 return (-1); 1512 #else /* SMALL */ 1513 cmd = RTM_GET; 1514 if (so_ifp.sa.sa_family == 0) { 1515 so_ifp.sa.sa_family = AF_LINK; 1516 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1517 rtm_addrs |= RTA_IFP; 1518 } 1519 #endif /* SMALL */ 1520 } else 1521 cmd = RTM_DELETE; 1522 #define rtm m_rtmsg.m_rtm 1523 rtm.rtm_type = cmd; 1524 rtm.rtm_flags = flags; 1525 rtm.rtm_version = RTM_VERSION; 1526 rtm.rtm_seq = ++seq; 1527 rtm.rtm_addrs = rtm_addrs; 1528 rtm.rtm_rmx = rt_metrics; 1529 rtm.rtm_inits = rtm_inits; 1530 1531 if (rtm_addrs & RTA_NETMASK) 1532 mask_addr(); 1533 NEXTADDR(RTA_DST, so_dst); 1534 NEXTADDR(RTA_GATEWAY, so_gate); 1535 NEXTADDR(RTA_NETMASK, so_mask); 1536 NEXTADDR(RTA_GENMASK, so_genmask); 1537 NEXTADDR(RTA_IFP, so_ifp); 1538 NEXTADDR(RTA_IFA, so_ifa); 1539 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1540 if (verbose && ! shortoutput) 1541 print_rtmsg(&rtm, l); 1542 if (debugonly) 1543 return (0); 1544 if ((rlen = write(sock, (char *)&m_rtmsg, l)) < 0) { 1545 perror("writing to routing socket"); 1546 return (-1); 1547 } 1548 #ifndef SMALL 1549 if (cmd == RTM_GET) { 1550 do { 1551 l = read(sock, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1552 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1553 if (l < 0) 1554 err(1, "read from routing socket"); 1555 else 1556 print_getmsg(&rtm, l); 1557 } 1558 #endif /* SMALL */ 1559 #undef rtm 1560 return (0); 1561 } 1562 1563 static void 1564 mask_addr() 1565 { 1566 int olen = so_mask.sa.sa_len; 1567 char *cp1 = olen + (char *)&so_mask, *cp2; 1568 1569 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1570 if (*--cp1 != 0) { 1571 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1572 break; 1573 } 1574 if ((rtm_addrs & RTA_DST) == 0) 1575 return; 1576 switch (so_dst.sa.sa_family) { 1577 case AF_INET: 1578 #ifdef INET6 1579 case AF_INET6: 1580 #endif 1581 case AF_APPLETALK: 1582 #ifndef SMALL 1583 case AF_NS: 1584 case AF_CCITT: 1585 #endif /* SMALL */ 1586 case 0: 1587 return; 1588 #ifndef SMALL 1589 case AF_ISO: 1590 olen = MIN(so_dst.siso.siso_nlen, 1591 MAX(so_mask.sa.sa_len - 6, 0)); 1592 break; 1593 #endif /* SMALL */ 1594 } 1595 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1596 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1597 while (cp2 > cp1) 1598 *--cp2 = 0; 1599 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1600 while (cp1 > so_dst.sa.sa_data) 1601 *--cp1 &= *--cp2; 1602 #ifndef SMALL 1603 switch (so_dst.sa.sa_family) { 1604 case AF_ISO: 1605 so_dst.siso.siso_nlen = olen; 1606 break; 1607 } 1608 #endif /* SMALL */ 1609 } 1610 1611 char *msgtypes[] = { 1612 "", 1613 "RTM_ADD: Add Route", 1614 "RTM_DELETE: Delete Route", 1615 "RTM_CHANGE: Change Metrics or flags", 1616 "RTM_GET: Report Metrics", 1617 "RTM_LOSING: Kernel Suspects Partitioning", 1618 "RTM_REDIRECT: Told to use different route", 1619 "RTM_MISS: Lookup failed on this address", 1620 "RTM_LOCK: fix specified metrics", 1621 "RTM_OLDADD: caused by SIOCADDRT", 1622 "RTM_OLDDEL: caused by SIOCDELRT", 1623 "RTM_RESOLVE: Route created by cloning", 1624 "RTM_NEWADDR: address being added to iface", 1625 "RTM_DELADDR: address being removed from iface", 1626 "RTM_OIFINFO: iface status change (pre-1.5)", 1627 "RTM_IFINFO: iface status change", 1628 "RTM_IFANNOUNCE: iface arrival/departure", 1629 0, 1630 }; 1631 1632 char metricnames[] = 1633 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 1634 char routeflags[] = 1635 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016CLONED\017PROTO2\020PROTO1"; 1636 char ifnetflags[] = 1637 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST"; 1638 char addrnames[] = 1639 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1640 1641 1642 #ifndef SMALL 1643 static const char * 1644 linkstate(ifm) 1645 struct if_msghdr *ifm; 1646 { 1647 static char buf[64]; 1648 1649 switch (ifm->ifm_data.ifi_link_state) { 1650 case LINK_STATE_UNKNOWN: 1651 return "carrier: unknown"; 1652 case LINK_STATE_DOWN: 1653 return "carrier: no carrier"; 1654 case LINK_STATE_UP: 1655 return "carrier: active"; 1656 default: 1657 (void)snprintf(buf, sizeof(buf), "carrier: 0x%x", 1658 ifm->ifm_data.ifi_link_state); 1659 return buf; 1660 } 1661 } 1662 #endif /* SMALL */ 1663 1664 static void 1665 print_rtmsg(rtm, msglen) 1666 struct rt_msghdr *rtm; 1667 int msglen; 1668 { 1669 struct if_msghdr *ifm; 1670 struct ifa_msghdr *ifam; 1671 struct if_announcemsghdr *ifan; 1672 1673 if (verbose == 0) 1674 return; 1675 if (rtm->rtm_version != RTM_VERSION) { 1676 (void) printf("routing message version %d not understood\n", 1677 rtm->rtm_version); 1678 return; 1679 } 1680 if (msgtypes[rtm->rtm_type]) 1681 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1682 else 1683 (void)printf("#%d: ", rtm->rtm_type); 1684 (void)printf("len %d, ", rtm->rtm_msglen); 1685 switch (rtm->rtm_type) { 1686 case RTM_IFINFO: 1687 ifm = (struct if_msghdr *)rtm; 1688 (void) printf("if# %d, %s, flags:", ifm->ifm_index, 1689 #ifdef SMALL 1690 "" 1691 #else 1692 linkstate(ifm) 1693 #endif /* SMALL */ 1694 ); 1695 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1696 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1697 break; 1698 case RTM_NEWADDR: 1699 case RTM_DELADDR: 1700 ifam = (struct ifa_msghdr *)rtm; 1701 (void) printf("metric %d, flags:", ifam->ifam_metric); 1702 bprintf(stdout, ifam->ifam_flags, routeflags); 1703 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1704 break; 1705 case RTM_IFANNOUNCE: 1706 ifan = (struct if_announcemsghdr *)rtm; 1707 (void) printf("if# %d, what: ", ifan->ifan_index); 1708 switch (ifan->ifan_what) { 1709 case IFAN_ARRIVAL: 1710 printf("arrival"); 1711 break; 1712 case IFAN_DEPARTURE: 1713 printf("departure"); 1714 break; 1715 default: 1716 printf("#%d", ifan->ifan_what); 1717 break; 1718 } 1719 printf("\n"); 1720 break; 1721 default: 1722 (void) printf("pid: %d, seq %d, errno %d, flags:", 1723 rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1724 bprintf(stdout, rtm->rtm_flags, routeflags); 1725 pmsg_common(rtm); 1726 } 1727 } 1728 1729 #ifndef SMALL 1730 static void 1731 print_getmsg(rtm, msglen) 1732 struct rt_msghdr *rtm; 1733 int msglen; 1734 { 1735 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL, *ifa = NULL; 1736 struct sockaddr_dl *ifp = NULL; 1737 struct sockaddr *sa; 1738 char *cp; 1739 int i; 1740 1741 if (! shortoutput) 1742 (void) printf(" route to: %s\n", 1743 routename((struct sockaddr *) &so_dst, NULL, RTF_HOST)); 1744 if (rtm->rtm_version != RTM_VERSION) { 1745 warnx("routing message version %d not understood", 1746 rtm->rtm_version); 1747 return; 1748 } 1749 if (rtm->rtm_msglen > msglen) { 1750 warnx("message length mismatch, in packet %d, returned %d", 1751 rtm->rtm_msglen, msglen); 1752 } 1753 if (rtm->rtm_errno) { 1754 warn("RTM_GET"); 1755 return; 1756 } 1757 cp = ((char *)(rtm + 1)); 1758 if (rtm->rtm_addrs) 1759 for (i = 1; i; i <<= 1) 1760 if (i & rtm->rtm_addrs) { 1761 sa = (struct sockaddr *)cp; 1762 switch (i) { 1763 case RTA_DST: 1764 dst = sa; 1765 break; 1766 case RTA_GATEWAY: 1767 gate = sa; 1768 break; 1769 case RTA_NETMASK: 1770 mask = sa; 1771 break; 1772 case RTA_IFP: 1773 if (sa->sa_family == AF_LINK && 1774 ((struct sockaddr_dl *)sa)->sdl_nlen) 1775 ifp = (struct sockaddr_dl *)sa; 1776 break; 1777 case RTA_IFA: 1778 ifa = sa; 1779 break; 1780 } 1781 ADVANCE(cp, sa); 1782 } 1783 if (dst && mask) 1784 mask->sa_family = dst->sa_family; /* XXX */ 1785 if (dst && ! shortoutput) 1786 (void)printf("destination: %s\n", 1787 routename(dst, mask, RTF_HOST)); 1788 if (mask && ! shortoutput) { 1789 int savenflag = nflag; 1790 1791 nflag = 1; 1792 (void)printf(" mask: %s\n", 1793 routename(mask, NULL, RTF_HOST)); 1794 nflag = savenflag; 1795 } 1796 if (gate && rtm->rtm_flags & RTF_GATEWAY && ! shortoutput) 1797 (void)printf(" gateway: %s\n", 1798 routename(gate, NULL, RTF_HOST)); 1799 if (ifa && ! shortoutput) 1800 (void)printf(" local addr: %s\n", 1801 routename(ifa, NULL, RTF_HOST)); 1802 if (ifp && ! shortoutput) 1803 (void)printf(" interface: %.*s\n", 1804 ifp->sdl_nlen, ifp->sdl_data); 1805 if (! shortoutput) { 1806 (void)printf(" flags: "); 1807 bprintf(stdout, rtm->rtm_flags, routeflags); 1808 } 1809 1810 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1811 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1812 1813 if (! shortoutput) { 1814 (void) printf("\n%s\n", "\ 1815 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1816 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1817 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1818 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1819 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1820 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1821 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1822 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1823 if (rtm->rtm_rmx.rmx_expire) 1824 rtm->rtm_rmx.rmx_expire -= time(0); 1825 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1826 } 1827 #undef lock 1828 #undef msec 1829 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1830 1831 if ((rtm->rtm_addrs & RTF_GATEWAY) == 0) 1832 rv = 1; 1833 else { 1834 char *name; 1835 int addrs; 1836 1837 cp = (char *)(rtm + 1); 1838 addrs = rtm->rtm_addrs; 1839 1840 for (i = 1; i; i <<= 1) { 1841 sa = (struct sockaddr *)cp; 1842 if (i == RTF_GATEWAY) { 1843 name = routename(sa, NULL, RTF_HOST); 1844 if (name[0] == '\0') 1845 rv = 1; 1846 else if (shortoutput) 1847 printf("%s\n", name); 1848 } 1849 if (i & addrs) 1850 ADVANCE(cp, sa); 1851 } 1852 } 1853 1854 if (shortoutput) 1855 return; 1856 else if (verbose) 1857 pmsg_common(rtm); 1858 else if (rtm->rtm_addrs &~ RTA_IGN) { 1859 (void) printf("sockaddrs: "); 1860 bprintf(stdout, rtm->rtm_addrs, addrnames); 1861 putchar('\n'); 1862 } 1863 #undef RTA_IGN 1864 } 1865 #endif /* SMALL */ 1866 1867 void 1868 pmsg_common(rtm) 1869 struct rt_msghdr *rtm; 1870 { 1871 (void) printf("\nlocks: "); 1872 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1873 (void) printf(" inits: "); 1874 bprintf(stdout, rtm->rtm_inits, metricnames); 1875 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1876 } 1877 1878 static void 1879 pmsg_addrs(cp, addrs) 1880 char *cp; 1881 int addrs; 1882 { 1883 struct sockaddr *sa; 1884 int i; 1885 1886 if (addrs != 0) { 1887 (void) printf("\nsockaddrs: "); 1888 bprintf(stdout, addrs, addrnames); 1889 (void) putchar('\n'); 1890 for (i = 1; i; i <<= 1) 1891 if (i & addrs) { 1892 sa = (struct sockaddr *)cp; 1893 (void) printf(" %s", 1894 routename(sa, NULL, RTF_HOST)); 1895 ADVANCE(cp, sa); 1896 } 1897 } 1898 (void) putchar('\n'); 1899 (void) fflush(stdout); 1900 } 1901 1902 static void 1903 bprintf(fp, b, s) 1904 FILE *fp; 1905 int b; 1906 u_char *s; 1907 { 1908 int i; 1909 int gotsome = 0; 1910 1911 if (b == 0) 1912 return; 1913 while ((i = *s++) != 0) { 1914 if (b & (1 << (i-1))) { 1915 if (gotsome == 0) 1916 i = '<'; 1917 else 1918 i = ','; 1919 (void) putc(i, fp); 1920 gotsome = 1; 1921 for (; (i = *s) > 32; s++) 1922 (void) putc(i, fp); 1923 } else 1924 while (*s > 32) 1925 s++; 1926 } 1927 if (gotsome) 1928 (void) putc('>', fp); 1929 } 1930 1931 static int 1932 keyword(cp) 1933 char *cp; 1934 { 1935 struct keytab *kt = keywords; 1936 1937 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1938 kt++; 1939 return kt->kt_i; 1940 } 1941 1942 static void 1943 sodump(su, which) 1944 sup su; 1945 char *which; 1946 { 1947 #ifdef INET6 1948 char ntop_buf[NI_MAXHOST]; 1949 #endif 1950 1951 switch (su->sa.sa_family) { 1952 case AF_INET: 1953 (void) printf("%s: inet %s; ", 1954 which, inet_ntoa(su->sin.sin_addr)); 1955 break; 1956 case AF_APPLETALK: 1957 (void) printf("%s: atalk %d.%d; ", 1958 which, su->sat.sat_addr.s_net, su->sat.sat_addr.s_node); 1959 break; 1960 case AF_LINK: 1961 (void) printf("%s: link %s; ", 1962 which, link_ntoa(&su->sdl)); 1963 break; 1964 #ifndef SMALL 1965 #ifdef INET6 1966 case AF_INET6: 1967 (void) printf("%s: inet6 %s; ", 1968 which, inet_ntop(AF_INET6, &su->sin6.sin6_addr, 1969 ntop_buf, sizeof(ntop_buf))); 1970 break; 1971 #endif 1972 case AF_ISO: 1973 (void) printf("%s: iso %s; ", 1974 which, iso_ntoa(&su->siso.siso_addr)); 1975 break; 1976 case AF_NS: 1977 (void) printf("%s: xns %s; ", 1978 which, ns_ntoa(su->sns.sns_addr)); 1979 break; 1980 #endif /* SMALL */ 1981 default: 1982 (void) printf("af %p: %s; ", 1983 which, any_ntoa(&su->sa)); 1984 } 1985 (void) fflush(stdout); 1986 } 1987 1988 /* States*/ 1989 #define VIRGIN 0 1990 #define GOTONE 1 1991 #define GOTTWO 2 1992 /* Inputs */ 1993 #define DIGIT (4*0) 1994 #define END (4*1) 1995 #define DELIM (4*2) 1996 1997 static void 1998 sockaddr(addr, sa) 1999 char *addr; 2000 struct sockaddr *sa; 2001 { 2002 char *cp = (char *)sa; 2003 int size = sa->sa_len; 2004 char *cplim = cp + size; 2005 int byte = 0, state = VIRGIN, new = 0; 2006 2007 (void) memset(cp, 0, size); 2008 cp++; 2009 do { 2010 if ((*addr >= '0') && (*addr <= '9')) { 2011 new = *addr - '0'; 2012 } else if ((*addr >= 'a') && (*addr <= 'f')) { 2013 new = *addr - 'a' + 10; 2014 } else if ((*addr >= 'A') && (*addr <= 'F')) { 2015 new = *addr - 'A' + 10; 2016 } else if (*addr == 0) 2017 state |= END; 2018 else 2019 state |= DELIM; 2020 addr++; 2021 switch (state /* | INPUT */) { 2022 case GOTTWO | DIGIT: 2023 *cp++ = byte; /*FALLTHROUGH*/ 2024 case VIRGIN | DIGIT: 2025 state = GOTONE; byte = new; continue; 2026 case GOTONE | DIGIT: 2027 state = GOTTWO; byte = new + (byte << 4); continue; 2028 default: /* | DELIM */ 2029 state = VIRGIN; *cp++ = byte; byte = 0; continue; 2030 case GOTONE | END: 2031 case GOTTWO | END: 2032 *cp++ = byte; /* FALLTHROUGH */ 2033 case VIRGIN | END: 2034 break; 2035 } 2036 break; 2037 } while (cp < cplim); 2038 sa->sa_len = cp - (char *)sa; 2039 } 2040
Indexes created Tue Sep 30 11:09:46 GMT 2025