route.c revision 1.54
1 /* $NetBSD: route.c,v 1.54 2002/05/20 23:01:32 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 1.54 2002/05/20 23:01:32 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 argc--; 938 if (prefixlen(*++argv) == 128) { 939 forcenet = 0; 940 ishost = 1; 941 } else { 942 forcenet = 1; 943 ishost = 0; 944 } 945 break; 946 case K_MTU: 947 case K_HOPCOUNT: 948 case K_EXPIRE: 949 case K_RECVPIPE: 950 case K_SENDPIPE: 951 case K_SSTHRESH: 952 case K_RTT: 953 case K_RTTVAR: 954 if (!--argc) 955 usage(1+*argv); 956 set_metric(*++argv, key); 957 break; 958 default: 959 usage(1+*argv); 960 } 961 } else { 962 if ((rtm_addrs & RTA_DST) == 0) { 963 dest = *argv; 964 ishost = getaddr(RTA_DST, *argv, &hp); 965 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 966 gateway = *argv; 967 (void) getaddr(RTA_GATEWAY, *argv, &hp); 968 } else { 969 ret = atoi(*argv); 970 971 if (ret == 0) { 972 if (!qflag && strcmp(*argv, "0") == 0) 973 warnx("%s, %s", 974 "old usage of trailing 0", 975 "assuming route to if"); 976 else 977 usage((char *)NULL); 978 iflag = 1; 979 continue; 980 } else if (ret > 0 && ret < 10) { 981 if (!qflag) { 982 warnx("%s, %s", 983 "old usage of trailing digit", 984 "assuming route via gateway"); 985 } 986 iflag = 0; 987 continue; 988 } 989 (void) getaddr(RTA_NETMASK, *argv, 0); 990 } 991 } 992 } 993 if (forcehost) 994 ishost = 1; 995 if (forcenet) 996 ishost = 0; 997 flags |= RTF_UP; 998 if (ishost) 999 flags |= RTF_HOST; 1000 if (iflag == 0) 1001 flags |= RTF_GATEWAY; 1002 for (attempts = 1; ; attempts++) { 1003 errno = 0; 1004 if ((ret = rtmsg(*cmd, flags)) == 0) 1005 break; 1006 if (errno != ENETUNREACH && errno != ESRCH) 1007 break; 1008 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 1009 hp->h_addr_list++; 1010 memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0], 1011 hp->h_length); 1012 } else 1013 break; 1014 } 1015 if (*cmd == 'g') 1016 return rv; 1017 oerrno = errno; 1018 if (!qflag) { 1019 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 1020 if (*gateway) { 1021 (void) printf(": gateway %s", gateway); 1022 if (attempts > 1 && ret == 0 && af == AF_INET) 1023 (void) printf(" (%s)", 1024 inet_ntoa(so_gate.sin.sin_addr)); 1025 } 1026 if (ret == 0) 1027 (void) printf("\n"); 1028 } 1029 if (ret != 0) { 1030 switch (oerrno) { 1031 case ESRCH: 1032 error = "not in table"; 1033 break; 1034 case EBUSY: 1035 error = "entry in use"; 1036 break; 1037 case ENOBUFS: 1038 error = "routing table overflow"; 1039 break; 1040 default: 1041 error = strerror(oerrno); 1042 break; 1043 } 1044 (void) printf(": %s\n", error); 1045 return 1; 1046 } 1047 return 0; 1048 } 1049 1050 static void 1051 inet_makenetandmask(net, isin) 1052 u_int32_t net; 1053 struct sockaddr_in *isin; 1054 { 1055 u_int32_t addr, mask = 0; 1056 char *cp; 1057 1058 rtm_addrs |= RTA_NETMASK; 1059 if (net == 0) 1060 mask = addr = 0; 1061 else if (net < 128) { 1062 addr = net << IN_CLASSA_NSHIFT; 1063 mask = IN_CLASSA_NET; 1064 } else if (net < 65536) { 1065 addr = net << IN_CLASSB_NSHIFT; 1066 mask = IN_CLASSB_NET; 1067 } else if (net < 16777216L) { 1068 addr = net << IN_CLASSC_NSHIFT; 1069 mask = IN_CLASSC_NET; 1070 } else { 1071 addr = net; 1072 if ((addr & IN_CLASSA_HOST) == 0) 1073 mask = IN_CLASSA_NET; 1074 else if ((addr & IN_CLASSB_HOST) == 0) 1075 mask = IN_CLASSB_NET; 1076 else if ((addr & IN_CLASSC_HOST) == 0) 1077 mask = IN_CLASSC_NET; 1078 else 1079 mask = -1; 1080 } 1081 isin->sin_addr.s_addr = htonl(addr); 1082 isin = &so_mask.sin; 1083 isin->sin_addr.s_addr = htonl(mask); 1084 isin->sin_len = 0; 1085 isin->sin_family = 0; 1086 cp = (char *)(&isin->sin_addr + 1); 1087 while (*--cp == 0 && cp > (char *)isin) 1088 ; 1089 isin->sin_len = 1 + cp - (char *)isin; 1090 } 1091 1092 #ifdef INET6 1093 /* 1094 * XXX the function may need more improvement... 1095 */ 1096 static int 1097 inet6_makenetandmask(sin6) 1098 struct sockaddr_in6 *sin6; 1099 { 1100 char *plen; 1101 struct in6_addr in6; 1102 1103 plen = NULL; 1104 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1105 sin6->sin6_scope_id == 0) { 1106 plen = "0"; 1107 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1108 /* aggregatable global unicast - RFC2374 */ 1109 memset(&in6, 0, sizeof(in6)); 1110 if (!memcmp(&sin6->sin6_addr.s6_addr[8], &in6.s6_addr[8], 8)) 1111 plen = "64"; 1112 else 1113 plen = "128"; 1114 } 1115 1116 if (plen) { 1117 rtm_addrs |= RTA_NETMASK; 1118 return prefixlen(plen); 1119 } 1120 1121 return -1; 1122 } 1123 #endif 1124 1125 /* 1126 * Interpret an argument as a network address of some kind, 1127 * returning 1 if a host address, 0 if a network address. 1128 */ 1129 static int 1130 getaddr(which, s, hpp) 1131 int which; 1132 char *s; 1133 struct hostent **hpp; 1134 { 1135 sup su; 1136 struct hostent *hp; 1137 struct netent *np; 1138 u_int32_t val; 1139 char *t; 1140 int afamily; /* local copy of af so we can change it */ 1141 1142 if (af == 0) { 1143 af = AF_INET; 1144 aflen = sizeof(struct sockaddr_in); 1145 } 1146 afamily = af; 1147 rtm_addrs |= which; 1148 switch (which) { 1149 case RTA_DST: 1150 su = &so_dst; 1151 break; 1152 case RTA_GATEWAY: 1153 su = &so_gate; 1154 break; 1155 case RTA_NETMASK: 1156 su = &so_mask; 1157 break; 1158 case RTA_GENMASK: 1159 su = &so_genmask; 1160 break; 1161 case RTA_IFP: 1162 su = &so_ifp; 1163 afamily = AF_LINK; 1164 break; 1165 case RTA_IFA: 1166 su = &so_ifa; 1167 su->sa.sa_family = af; 1168 break; 1169 default: 1170 su = NULL; 1171 usage("Internal Error"); 1172 /*NOTREACHED*/ 1173 } 1174 su->sa.sa_len = aflen; 1175 su->sa.sa_family = afamily; /* cases that don't want it have left already */ 1176 if (strcmp(s, "default") == 0) { 1177 switch (which) { 1178 case RTA_DST: 1179 forcenet++; 1180 (void) getaddr(RTA_NETMASK, s, 0); 1181 break; 1182 case RTA_NETMASK: 1183 case RTA_GENMASK: 1184 su->sa.sa_len = 0; 1185 } 1186 return (0); 1187 } 1188 switch (afamily) { 1189 #ifndef SMALL 1190 #ifdef INET6 1191 case AF_INET6: 1192 { 1193 struct addrinfo hints, *res; 1194 1195 memset(&hints, 0, sizeof(hints)); 1196 hints.ai_family = afamily; /*AF_INET6*/ 1197 hints.ai_flags = AI_NUMERICHOST; 1198 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1199 if (getaddrinfo(s, "0", &hints, &res) != 0 || 1200 res->ai_family != AF_INET6 || 1201 res->ai_addrlen != sizeof(su->sin6)) { 1202 (void) fprintf(stderr, "%s: bad value\n", s); 1203 exit(1); 1204 } 1205 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1206 #ifdef __KAME__ 1207 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 1208 IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) && 1209 su->sin6.sin6_scope_id) { 1210 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 1211 htons(su->sin6.sin6_scope_id); 1212 su->sin6.sin6_scope_id = 0; 1213 } 1214 #endif 1215 freeaddrinfo(res); 1216 if (which == RTA_DST) 1217 if (inet6_makenetandmask(&su->sin6) == 128) 1218 return 1; 1219 return 0; 1220 } 1221 #endif 1222 1223 case AF_NS: 1224 if (which == RTA_DST) { 1225 struct sockaddr_ns *sms = &(so_mask.sns); 1226 memset(sms, 0, sizeof(*sms)); 1227 sms->sns_family = 0; 1228 sms->sns_len = 6; 1229 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 1230 rtm_addrs |= RTA_NETMASK; 1231 } 1232 su->sns.sns_addr = ns_addr(s); 1233 return (!ns_nullhost(su->sns.sns_addr)); 1234 1235 case AF_OSI: 1236 su->siso.siso_addr = *iso_addr(s); 1237 if (which == RTA_NETMASK || which == RTA_GENMASK) { 1238 char *cp = (char *)TSEL(&su->siso); 1239 su->siso.siso_nlen = 0; 1240 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 1241 su->siso.siso_len = 1 + cp - (char *)su; 1242 } 1243 return (1); 1244 1245 case AF_CCITT: 1246 ccitt_addr(s, &su->sx25); 1247 return (which == RTA_DST ? x25_makemask() : 1); 1248 #endif /* SMALL */ 1249 1250 case PF_ROUTE: 1251 su->sa.sa_len = sizeof(*su); 1252 sockaddr(s, &su->sa); 1253 return (1); 1254 1255 case AF_APPLETALK: 1256 t = strchr (s, '.'); 1257 if (!t) { 1258 badataddr: 1259 errx(1, "bad address: %s", s); 1260 } 1261 val = atoi (s); 1262 if (val > 65535) 1263 goto badataddr; 1264 su->sat.sat_addr.s_net = val; 1265 val = atoi (t); 1266 if (val > 256) 1267 goto badataddr; 1268 su->sat.sat_addr.s_node = val; 1269 rtm_addrs |= RTA_NETMASK; 1270 return(forcehost || su->sat.sat_addr.s_node != 0); 1271 1272 case AF_LINK: 1273 link_addr(s, &su->sdl); 1274 return (1); 1275 1276 case AF_INET: 1277 default: 1278 break; 1279 } 1280 1281 if (hpp == NULL) 1282 hpp = &hp; 1283 *hpp = NULL; 1284 if (((val = inet_addr(s)) != INADDR_NONE) && 1285 (which != RTA_DST || forcenet == 0)) { 1286 su->sin.sin_addr.s_addr = val; 1287 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1288 return (1); 1289 else { 1290 val = ntohl(val); 1291 goto netdone; 1292 } 1293 } 1294 if ((val = inet_network(s)) != INADDR_NONE || 1295 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) { 1296 netdone: 1297 if (which == RTA_DST) 1298 inet_makenetandmask(val, &su->sin); 1299 return (0); 1300 } 1301 hp = gethostbyname(s); 1302 if (hp) { 1303 *hpp = hp; 1304 su->sin.sin_family = hp->h_addrtype; 1305 memmove(&su->sin.sin_addr, hp->h_addr, hp->h_length); 1306 return (1); 1307 } 1308 errx(1, "bad value: %s", s); 1309 } 1310 1311 int 1312 prefixlen(s) 1313 char *s; 1314 { 1315 int len = atoi(s), q, r; 1316 int max; 1317 1318 switch (af) { 1319 case AF_INET: 1320 max = sizeof(struct in_addr) * 8; 1321 break; 1322 #ifdef INET6 1323 case AF_INET6: 1324 max = sizeof(struct in6_addr) * 8; 1325 break; 1326 #endif 1327 default: 1328 (void) fprintf(stderr, 1329 "prefixlen is not supported with af %d\n", af); 1330 exit(1); 1331 } 1332 1333 rtm_addrs |= RTA_NETMASK; 1334 if (len < -1 || len > max) { 1335 (void) fprintf(stderr, "%s: bad value\n", s); 1336 exit(1); 1337 } 1338 1339 q = len >> 3; 1340 r = len & 7; 1341 switch (af) { 1342 case AF_INET: 1343 memset(&so_mask, 0, sizeof(so_mask)); 1344 so_mask.sin.sin_family = AF_INET; 1345 so_mask.sin.sin_len = sizeof(struct sockaddr_in); 1346 so_mask.sin.sin_addr.s_addr = htonl(0xffffffff << (32 - len)); 1347 break; 1348 #ifdef INET6 1349 case AF_INET6: 1350 so_mask.sin6.sin6_family = AF_INET6; 1351 so_mask.sin6.sin6_len = sizeof(struct sockaddr_in6); 1352 memset((void *)&so_mask.sin6.sin6_addr, 0, 1353 sizeof(so_mask.sin6.sin6_addr)); 1354 if (q > 0) 1355 memset((void *)&so_mask.sin6.sin6_addr, 0xff, q); 1356 if (r > 0) 1357 *((u_char *)&so_mask.sin6.sin6_addr + q) = 1358 (0xff00 >> r) & 0xff; 1359 break; 1360 #endif 1361 } 1362 return(len); 1363 } 1364 1365 #ifndef SMALL 1366 int 1367 x25_makemask() 1368 { 1369 char *cp; 1370 1371 if ((rtm_addrs & RTA_NETMASK) == 0) { 1372 rtm_addrs |= RTA_NETMASK; 1373 for (cp = (char *)&so_mask.sx25.x25_net; 1374 cp < &so_mask.sx25.x25_opts.op_flags; cp++) 1375 *cp = -1; 1376 so_mask.sx25.x25_len = (u_char)&(((sup)0)->sx25.x25_opts); 1377 } 1378 return 0; 1379 } 1380 1381 1382 char * 1383 ns_print(sns) 1384 struct sockaddr_ns *sns; 1385 { 1386 struct ns_addr work; 1387 union { union ns_net net_e; u_int32_t int32_t_e; } net; 1388 u_short port; 1389 static char mybuf[50], cport[10], chost[25]; 1390 char *host = ""; 1391 char *p; 1392 u_char *q; 1393 1394 work = sns->sns_addr; 1395 port = ntohs(work.x_port); 1396 work.x_port = 0; 1397 net.net_e = work.x_net; 1398 if (ns_nullhost(work) && net.int32_t_e == 0) { 1399 if (!port) 1400 return ("*.*"); 1401 (void)snprintf(mybuf, sizeof mybuf, "*.%XH", port); 1402 return (mybuf); 1403 } 1404 1405 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) 1406 host = "any"; 1407 else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) 1408 host = "*"; 1409 else { 1410 q = work.x_host.c_host; 1411 (void)snprintf(chost, sizeof chost, "%02X%02X%02X%02X%02X%02XH", 1412 q[0], q[1], q[2], q[3], q[4], q[5]); 1413 for (p = chost; *p == '0' && p < chost + 12; p++) 1414 /* void */; 1415 host = p; 1416 } 1417 if (port) 1418 (void)snprintf(cport, sizeof cport, ".%XH", htons(port)); 1419 else 1420 *cport = 0; 1421 1422 (void)snprintf(mybuf, sizeof mybuf, "%XH.%s%s", 1423 (u_int32_t)ntohl(net.int32_t_e), host, cport); 1424 return (mybuf); 1425 } 1426 1427 static void 1428 interfaces() 1429 { 1430 size_t needed; 1431 int mib[6]; 1432 char *buf, *lim, *next; 1433 struct rt_msghdr *rtm; 1434 1435 mib[0] = CTL_NET; 1436 mib[1] = PF_ROUTE; 1437 mib[2] = 0; /* protocol */ 1438 mib[3] = 0; /* wildcard address family */ 1439 mib[4] = NET_RT_IFLIST; 1440 mib[5] = 0; /* no flags */ 1441 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1442 err(1, "route-sysctl-estimate"); 1443 if ((buf = malloc(needed)) == NULL) 1444 err(1, "malloc"); 1445 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 1446 err(1, "actual retrieval of interface table"); 1447 lim = buf + needed; 1448 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1449 rtm = (struct rt_msghdr *)next; 1450 print_rtmsg(rtm, rtm->rtm_msglen); 1451 } 1452 } 1453 1454 static void 1455 monitor() 1456 { 1457 int n; 1458 char msg[2048]; 1459 1460 verbose = 1; 1461 if (debugonly) { 1462 interfaces(); 1463 exit(0); 1464 } 1465 for(;;) { 1466 time_t now; 1467 n = read(sock, msg, 2048); 1468 now = time(NULL); 1469 (void) printf("got message of size %d on %s", n, ctime(&now)); 1470 print_rtmsg((struct rt_msghdr *)msg, n); 1471 } 1472 } 1473 1474 #endif /* SMALL */ 1475 1476 1477 struct { 1478 struct rt_msghdr m_rtm; 1479 char m_space[512]; 1480 } m_rtmsg; 1481 1482 static int 1483 rtmsg(cmd, flags) 1484 int cmd, flags; 1485 { 1486 static int seq; 1487 int rlen; 1488 char *cp = m_rtmsg.m_space; 1489 int l; 1490 1491 #define NEXTADDR(w, u) \ 1492 if (rtm_addrs & (w)) {\ 1493 l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\ 1494 if (verbose && ! shortoutput) sodump(&(u),"u");\ 1495 } 1496 1497 errno = 0; 1498 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1499 if (cmd == 'a') 1500 cmd = RTM_ADD; 1501 else if (cmd == 'c') 1502 cmd = RTM_CHANGE; 1503 else if (cmd == 'g') { 1504 #ifdef SMALL 1505 return (-1); 1506 #else /* SMALL */ 1507 cmd = RTM_GET; 1508 if (so_ifp.sa.sa_family == 0) { 1509 so_ifp.sa.sa_family = AF_LINK; 1510 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1511 rtm_addrs |= RTA_IFP; 1512 } 1513 #endif /* SMALL */ 1514 } else 1515 cmd = RTM_DELETE; 1516 #define rtm m_rtmsg.m_rtm 1517 rtm.rtm_type = cmd; 1518 rtm.rtm_flags = flags; 1519 rtm.rtm_version = RTM_VERSION; 1520 rtm.rtm_seq = ++seq; 1521 rtm.rtm_addrs = rtm_addrs; 1522 rtm.rtm_rmx = rt_metrics; 1523 rtm.rtm_inits = rtm_inits; 1524 1525 if (rtm_addrs & RTA_NETMASK) 1526 mask_addr(); 1527 NEXTADDR(RTA_DST, so_dst); 1528 NEXTADDR(RTA_GATEWAY, so_gate); 1529 NEXTADDR(RTA_NETMASK, so_mask); 1530 NEXTADDR(RTA_GENMASK, so_genmask); 1531 NEXTADDR(RTA_IFP, so_ifp); 1532 NEXTADDR(RTA_IFA, so_ifa); 1533 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1534 if (verbose && ! shortoutput) 1535 print_rtmsg(&rtm, l); 1536 if (debugonly) 1537 return (0); 1538 if ((rlen = write(sock, (char *)&m_rtmsg, l)) < 0) { 1539 perror("writing to routing socket"); 1540 return (-1); 1541 } 1542 #ifndef SMALL 1543 if (cmd == RTM_GET) { 1544 do { 1545 l = read(sock, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1546 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1547 if (l < 0) 1548 err(1, "read from routing socket"); 1549 else 1550 print_getmsg(&rtm, l); 1551 } 1552 #endif /* SMALL */ 1553 #undef rtm 1554 return (0); 1555 } 1556 1557 static void 1558 mask_addr() 1559 { 1560 int olen = so_mask.sa.sa_len; 1561 char *cp1 = olen + (char *)&so_mask, *cp2; 1562 1563 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1564 if (*--cp1 != 0) { 1565 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1566 break; 1567 } 1568 if ((rtm_addrs & RTA_DST) == 0) 1569 return; 1570 switch (so_dst.sa.sa_family) { 1571 case AF_INET: 1572 #ifdef INET6 1573 case AF_INET6: 1574 #endif 1575 case AF_APPLETALK: 1576 #ifndef SMALL 1577 case AF_NS: 1578 case AF_CCITT: 1579 #endif /* SMALL */ 1580 case 0: 1581 return; 1582 #ifndef SMALL 1583 case AF_ISO: 1584 olen = MIN(so_dst.siso.siso_nlen, 1585 MAX(so_mask.sa.sa_len - 6, 0)); 1586 break; 1587 #endif /* SMALL */ 1588 } 1589 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1590 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1591 while (cp2 > cp1) 1592 *--cp2 = 0; 1593 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1594 while (cp1 > so_dst.sa.sa_data) 1595 *--cp1 &= *--cp2; 1596 #ifndef SMALL 1597 switch (so_dst.sa.sa_family) { 1598 case AF_ISO: 1599 so_dst.siso.siso_nlen = olen; 1600 break; 1601 } 1602 #endif /* SMALL */ 1603 } 1604 1605 char *msgtypes[] = { 1606 "", 1607 "RTM_ADD: Add Route", 1608 "RTM_DELETE: Delete Route", 1609 "RTM_CHANGE: Change Metrics or flags", 1610 "RTM_GET: Report Metrics", 1611 "RTM_LOSING: Kernel Suspects Partitioning", 1612 "RTM_REDIRECT: Told to use different route", 1613 "RTM_MISS: Lookup failed on this address", 1614 "RTM_LOCK: fix specified metrics", 1615 "RTM_OLDADD: caused by SIOCADDRT", 1616 "RTM_OLDDEL: caused by SIOCDELRT", 1617 "RTM_RESOLVE: Route created by cloning", 1618 "RTM_NEWADDR: address being added to iface", 1619 "RTM_DELADDR: address being removed from iface", 1620 "RTM_OIFINFO: iface status change (pre-1.5)", 1621 "RTM_IFINFO: iface status change", 1622 "RTM_IFANNOUNCE: iface arrival/departure", 1623 0, 1624 }; 1625 1626 char metricnames[] = 1627 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 1628 char routeflags[] = 1629 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016CLONED\017PROTO2\020PROTO1"; 1630 char ifnetflags[] = 1631 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST"; 1632 char addrnames[] = 1633 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1634 1635 1636 #ifndef SMALL 1637 static const char * 1638 linkstate(ifm) 1639 struct if_msghdr *ifm; 1640 { 1641 static char buf[64]; 1642 1643 switch (ifm->ifm_data.ifi_link_state) { 1644 case LINK_STATE_UNKNOWN: 1645 return "carrier: unknown"; 1646 case LINK_STATE_DOWN: 1647 return "carrier: no carrier"; 1648 case LINK_STATE_UP: 1649 return "carrier: active"; 1650 default: 1651 (void)snprintf(buf, sizeof(buf), "carrier: 0x%x", 1652 ifm->ifm_data.ifi_link_state); 1653 return buf; 1654 } 1655 } 1656 #endif /* SMALL */ 1657 1658 static void 1659 print_rtmsg(rtm, msglen) 1660 struct rt_msghdr *rtm; 1661 int msglen; 1662 { 1663 struct if_msghdr *ifm; 1664 struct ifa_msghdr *ifam; 1665 struct if_announcemsghdr *ifan; 1666 1667 if (verbose == 0) 1668 return; 1669 if (rtm->rtm_version != RTM_VERSION) { 1670 (void) printf("routing message version %d not understood\n", 1671 rtm->rtm_version); 1672 return; 1673 } 1674 if (msgtypes[rtm->rtm_type]) 1675 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1676 else 1677 (void)printf("#%d: ", rtm->rtm_type); 1678 (void)printf("len %d, ", rtm->rtm_msglen); 1679 switch (rtm->rtm_type) { 1680 case RTM_IFINFO: 1681 ifm = (struct if_msghdr *)rtm; 1682 (void) printf("if# %d, %s, flags:", ifm->ifm_index, 1683 #ifdef SMALL 1684 "" 1685 #else 1686 linkstate(ifm) 1687 #endif /* SMALL */ 1688 ); 1689 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1690 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1691 break; 1692 case RTM_NEWADDR: 1693 case RTM_DELADDR: 1694 ifam = (struct ifa_msghdr *)rtm; 1695 (void) printf("metric %d, flags:", ifam->ifam_metric); 1696 bprintf(stdout, ifam->ifam_flags, routeflags); 1697 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1698 break; 1699 case RTM_IFANNOUNCE: 1700 ifan = (struct if_announcemsghdr *)rtm; 1701 (void) printf("if# %d, what: ", ifan->ifan_index); 1702 switch (ifan->ifan_what) { 1703 case IFAN_ARRIVAL: 1704 printf("arrival"); 1705 break; 1706 case IFAN_DEPARTURE: 1707 printf("departure"); 1708 break; 1709 default: 1710 printf("#%d", ifan->ifan_what); 1711 break; 1712 } 1713 printf("\n"); 1714 break; 1715 default: 1716 (void) printf("pid: %d, seq %d, errno %d, flags:", 1717 rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1718 bprintf(stdout, rtm->rtm_flags, routeflags); 1719 pmsg_common(rtm); 1720 } 1721 } 1722 1723 #ifndef SMALL 1724 static void 1725 print_getmsg(rtm, msglen) 1726 struct rt_msghdr *rtm; 1727 int msglen; 1728 { 1729 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL, *ifa = NULL; 1730 struct sockaddr_dl *ifp = NULL; 1731 struct sockaddr *sa; 1732 char *cp; 1733 int i; 1734 1735 if (! shortoutput) 1736 (void) printf(" route to: %s\n", 1737 routename((struct sockaddr *) &so_dst, NULL, RTF_HOST)); 1738 if (rtm->rtm_version != RTM_VERSION) { 1739 warnx("routing message version %d not understood", 1740 rtm->rtm_version); 1741 return; 1742 } 1743 if (rtm->rtm_msglen > msglen) { 1744 warnx("message length mismatch, in packet %d, returned %d\n", 1745 rtm->rtm_msglen, msglen); 1746 } 1747 if (rtm->rtm_errno) { 1748 warn("RTM_GET"); 1749 return; 1750 } 1751 cp = ((char *)(rtm + 1)); 1752 if (rtm->rtm_addrs) 1753 for (i = 1; i; i <<= 1) 1754 if (i & rtm->rtm_addrs) { 1755 sa = (struct sockaddr *)cp; 1756 switch (i) { 1757 case RTA_DST: 1758 dst = sa; 1759 break; 1760 case RTA_GATEWAY: 1761 gate = sa; 1762 break; 1763 case RTA_NETMASK: 1764 mask = sa; 1765 break; 1766 case RTA_IFP: 1767 if (sa->sa_family == AF_LINK && 1768 ((struct sockaddr_dl *)sa)->sdl_nlen) 1769 ifp = (struct sockaddr_dl *)sa; 1770 break; 1771 case RTA_IFA: 1772 ifa = sa; 1773 break; 1774 } 1775 ADVANCE(cp, sa); 1776 } 1777 if (dst && mask) 1778 mask->sa_family = dst->sa_family; /* XXX */ 1779 if (dst && ! shortoutput) 1780 (void)printf("destination: %s\n", 1781 routename(dst, mask, RTF_HOST)); 1782 if (mask && ! shortoutput) { 1783 int savenflag = nflag; 1784 1785 nflag = 1; 1786 (void)printf(" mask: %s\n", 1787 routename(mask, NULL, RTF_HOST)); 1788 nflag = savenflag; 1789 } 1790 if (gate && rtm->rtm_flags & RTF_GATEWAY && ! shortoutput) 1791 (void)printf(" gateway: %s\n", 1792 routename(gate, NULL, RTF_HOST)); 1793 if (ifa && ! shortoutput) 1794 (void)printf(" local addr: %s\n", 1795 routename(ifa, NULL, RTF_HOST)); 1796 if (ifp && ! shortoutput) 1797 (void)printf(" interface: %.*s\n", 1798 ifp->sdl_nlen, ifp->sdl_data); 1799 if (! shortoutput) { 1800 (void)printf(" flags: "); 1801 bprintf(stdout, rtm->rtm_flags, routeflags); 1802 } 1803 1804 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1805 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1806 1807 if (! shortoutput) { 1808 (void) printf("\n%s\n", "\ 1809 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1810 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1811 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1812 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1813 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1814 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1815 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1816 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1817 if (rtm->rtm_rmx.rmx_expire) 1818 rtm->rtm_rmx.rmx_expire -= time(0); 1819 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1820 } 1821 #undef lock 1822 #undef msec 1823 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1824 1825 if ((rtm->rtm_addrs & RTF_GATEWAY) == 0) 1826 rv = 1; 1827 else { 1828 char *name; 1829 int addrs; 1830 1831 cp = (char *)(rtm + 1); 1832 addrs = rtm->rtm_addrs; 1833 1834 for (i = 1; i; i <<= 1) { 1835 sa = (struct sockaddr *)cp; 1836 if (i == RTF_GATEWAY) { 1837 name = routename(sa, NULL, RTF_HOST); 1838 if (name[0] == '\0') 1839 rv = 1; 1840 else if (shortoutput) 1841 printf("%s\n", name); 1842 } 1843 if (i & addrs) 1844 ADVANCE(cp, sa); 1845 } 1846 } 1847 1848 if (shortoutput) 1849 return; 1850 else if (verbose) 1851 pmsg_common(rtm); 1852 else if (rtm->rtm_addrs &~ RTA_IGN) { 1853 (void) printf("sockaddrs: "); 1854 bprintf(stdout, rtm->rtm_addrs, addrnames); 1855 putchar('\n'); 1856 } 1857 #undef RTA_IGN 1858 } 1859 #endif /* SMALL */ 1860 1861 void 1862 pmsg_common(rtm) 1863 struct rt_msghdr *rtm; 1864 { 1865 (void) printf("\nlocks: "); 1866 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1867 (void) printf(" inits: "); 1868 bprintf(stdout, rtm->rtm_inits, metricnames); 1869 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1870 } 1871 1872 static void 1873 pmsg_addrs(cp, addrs) 1874 char *cp; 1875 int addrs; 1876 { 1877 struct sockaddr *sa; 1878 int i; 1879 1880 if (addrs != 0) { 1881 (void) printf("\nsockaddrs: "); 1882 bprintf(stdout, addrs, addrnames); 1883 (void) putchar('\n'); 1884 for (i = 1; i; i <<= 1) 1885 if (i & addrs) { 1886 sa = (struct sockaddr *)cp; 1887 (void) printf(" %s", 1888 routename(sa, NULL, RTF_HOST)); 1889 ADVANCE(cp, sa); 1890 } 1891 } 1892 (void) putchar('\n'); 1893 (void) fflush(stdout); 1894 } 1895 1896 static void 1897 bprintf(fp, b, s) 1898 FILE *fp; 1899 int b; 1900 u_char *s; 1901 { 1902 int i; 1903 int gotsome = 0; 1904 1905 if (b == 0) 1906 return; 1907 while ((i = *s++) != 0) { 1908 if (b & (1 << (i-1))) { 1909 if (gotsome == 0) 1910 i = '<'; 1911 else 1912 i = ','; 1913 (void) putc(i, fp); 1914 gotsome = 1; 1915 for (; (i = *s) > 32; s++) 1916 (void) putc(i, fp); 1917 } else 1918 while (*s > 32) 1919 s++; 1920 } 1921 if (gotsome) 1922 (void) putc('>', fp); 1923 } 1924 1925 static int 1926 keyword(cp) 1927 char *cp; 1928 { 1929 struct keytab *kt = keywords; 1930 1931 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1932 kt++; 1933 return kt->kt_i; 1934 } 1935 1936 static void 1937 sodump(su, which) 1938 sup su; 1939 char *which; 1940 { 1941 #ifdef INET6 1942 char ntop_buf[NI_MAXHOST]; 1943 #endif 1944 1945 switch (su->sa.sa_family) { 1946 case AF_INET: 1947 (void) printf("%s: inet %s; ", 1948 which, inet_ntoa(su->sin.sin_addr)); 1949 break; 1950 case AF_APPLETALK: 1951 (void) printf("%s: atalk %d.%d; ", 1952 which, su->sat.sat_addr.s_net, su->sat.sat_addr.s_node); 1953 break; 1954 case AF_LINK: 1955 (void) printf("%s: link %s; ", 1956 which, link_ntoa(&su->sdl)); 1957 break; 1958 #ifndef SMALL 1959 #ifdef INET6 1960 case AF_INET6: 1961 (void) printf("%s: inet6 %s; ", 1962 which, inet_ntop(AF_INET6, &su->sin6.sin6_addr, 1963 ntop_buf, sizeof(ntop_buf))); 1964 break; 1965 #endif 1966 case AF_ISO: 1967 (void) printf("%s: iso %s; ", 1968 which, iso_ntoa(&su->siso.siso_addr)); 1969 break; 1970 case AF_NS: 1971 (void) printf("%s: xns %s; ", 1972 which, ns_ntoa(su->sns.sns_addr)); 1973 break; 1974 #endif /* SMALL */ 1975 default: 1976 (void) printf("af %p: %s; ", 1977 which, any_ntoa(&su->sa)); 1978 } 1979 (void) fflush(stdout); 1980 } 1981 1982 /* States*/ 1983 #define VIRGIN 0 1984 #define GOTONE 1 1985 #define GOTTWO 2 1986 /* Inputs */ 1987 #define DIGIT (4*0) 1988 #define END (4*1) 1989 #define DELIM (4*2) 1990 1991 static void 1992 sockaddr(addr, sa) 1993 char *addr; 1994 struct sockaddr *sa; 1995 { 1996 char *cp = (char *)sa; 1997 int size = sa->sa_len; 1998 char *cplim = cp + size; 1999 int byte = 0, state = VIRGIN, new = 0; 2000 2001 (void) memset(cp, 0, size); 2002 cp++; 2003 do { 2004 if ((*addr >= '0') && (*addr <= '9')) { 2005 new = *addr - '0'; 2006 } else if ((*addr >= 'a') && (*addr <= 'f')) { 2007 new = *addr - 'a' + 10; 2008 } else if ((*addr >= 'A') && (*addr <= 'F')) { 2009 new = *addr - 'A' + 10; 2010 } else if (*addr == 0) 2011 state |= END; 2012 else 2013 state |= DELIM; 2014 addr++; 2015 switch (state /* | INPUT */) { 2016 case GOTTWO | DIGIT: 2017 *cp++ = byte; /*FALLTHROUGH*/ 2018 case VIRGIN | DIGIT: 2019 state = GOTONE; byte = new; continue; 2020 case GOTONE | DIGIT: 2021 state = GOTTWO; byte = new + (byte << 4); continue; 2022 default: /* | DELIM */ 2023 state = VIRGIN; *cp++ = byte; byte = 0; continue; 2024 case GOTONE | END: 2025 case GOTTWO | END: 2026 *cp++ = byte; /* FALLTHROUGH */ 2027 case VIRGIN | END: 2028 break; 2029 } 2030 break; 2031 } while (cp < cplim); 2032 sa->sa_len = cp - (char *)sa; 2033 } 2034
Indexes created Mon Sep 29 15:09:53 GMT 2025