route.c revision 1.52
1 /* $NetBSD: route.c,v 1.52 2001/11/15 21:25:08 christos 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 1.52 2001/11/15 21:25:08 christos 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 void 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 #endif 101 static int rtmsg __P((int, int )); 102 static void mask_addr __P((void)); 103 static void print_rtmsg __P((struct rt_msghdr *, int)); 104 static void pmsg_common __P((struct rt_msghdr *)); 105 static void pmsg_addrs __P((char *, int)); 106 static void bprintf __P((FILE *, int, u_char *)); 107 static int keyword __P((char *)); 108 static void sodump __P((sup, char *)); 109 static void sockaddr __P((char *, struct sockaddr *)); 110 111 union sockunion { 112 struct sockaddr sa; 113 struct sockaddr_in sin; 114 #ifdef INET6 115 struct sockaddr_in6 sin6; 116 #endif 117 struct sockaddr_at sat; 118 struct sockaddr_dl sdl; 119 #ifndef SMALL 120 struct sockaddr_ns sns; 121 struct sockaddr_iso siso; 122 struct sockaddr_x25 sx25; 123 #endif /* SMALL */ 124 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp; 125 126 int pid, rtm_addrs; 127 int sock; 128 int forcehost, forcenet, doflush, nflag, af, qflag, tflag; 129 int iflag, verbose, aflen = sizeof (struct sockaddr_in); 130 int locking, lockrest, debugonly, shortoutput, rv; 131 struct rt_metrics rt_metrics; 132 u_int32_t rtm_inits; 133 short ns_nullh[] = {0,0,0}; 134 short ns_bh[] = {-1,-1,-1}; 135 136 137 static void 138 usage(cp) 139 char *cp; 140 { 141 142 if (cp) 143 warnx("botched keyword: %s", cp); 144 (void) fprintf(stderr, 145 "Usage: %s [ -fnqvs ] cmd [[ -<qualifers> ] args ]\n", 146 getprogname()); 147 exit(1); 148 /* NOTREACHED */ 149 } 150 151 #define ROUNDUP(a) \ 152 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 153 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 154 155 int 156 main(argc, argv) 157 int argc; 158 char **argv; 159 { 160 int ch; 161 162 if (argc < 2) 163 usage(NULL); 164 165 while ((ch = getopt(argc, argv, "fnqvdts")) != -1) 166 switch(ch) { 167 case 'f': 168 doflush = 1; 169 break; 170 case 'n': 171 nflag = 1; 172 break; 173 case 'q': 174 qflag = 1; 175 break; 176 case 'v': 177 verbose = 1; 178 break; 179 case 't': 180 tflag = 1; 181 break; 182 case 'd': 183 debugonly = 1; 184 break; 185 case 's': 186 shortoutput = 1; 187 break; 188 case '?': 189 default: 190 usage(NULL); 191 /*NOTREACHED*/ 192 } 193 argc -= optind; 194 argv += optind; 195 196 pid = getpid(); 197 if (tflag) 198 sock = open("/dev/null", O_WRONLY, 0); 199 else 200 sock = socket(PF_ROUTE, SOCK_RAW, 0); 201 if (sock < 0) 202 err(1, "socket"); 203 204 if (*argv == NULL) { 205 if (doflush) 206 ch = K_FLUSH; 207 else 208 goto no_cmd; 209 } else 210 ch = keyword(*argv); 211 212 switch (ch) { 213 #ifndef SMALL 214 case K_GET: 215 #endif /* SMALL */ 216 case K_CHANGE: 217 case K_ADD: 218 case K_DELETE: 219 if (doflush) 220 (void)flushroutes(1, argv); 221 return newroute(argc, argv); 222 223 case K_SHOW: 224 show(argc, argv); 225 return 0; 226 227 #ifndef SMALL 228 case K_MONITOR: 229 monitor(); 230 return 0; 231 232 #endif /* SMALL */ 233 case K_FLUSH: 234 return flushroutes(argc, argv); 235 236 no_cmd: 237 default: 238 usage(*argv); 239 /*NOTREACHED*/ 240 } 241 } 242 243 /* 244 * Purge all entries in the routing tables not 245 * associated with network interfaces. 246 */ 247 static int 248 flushroutes(argc, argv) 249 int argc; 250 char *argv[]; 251 { 252 size_t needed; 253 int mib[6], rlen, seqno; 254 char *buf, *next, *lim; 255 struct rt_msghdr *rtm; 256 257 af = 0; 258 shutdown(sock, SHUT_RD); /* Don't want to read back our messages */ 259 if (argc > 1) { 260 argv++; 261 if (argc == 2 && **argv == '-') 262 switch (keyword(*argv + 1)) { 263 case K_INET: 264 af = AF_INET; 265 break; 266 #ifdef INET6 267 case K_INET6: 268 af = AF_INET6; 269 break; 270 #endif 271 case K_ATALK: 272 af = AF_APPLETALK; 273 break; 274 #ifndef SMALL 275 case K_XNS: 276 af = AF_NS; 277 break; 278 #endif /* SMALL */ 279 case K_LINK: 280 af = AF_LINK; 281 break; 282 #ifndef SMALL 283 case K_ISO: 284 case K_OSI: 285 af = AF_ISO; 286 break; 287 case K_X25: 288 af = AF_CCITT; 289 #endif /* SMALL */ 290 default: 291 goto bad; 292 } else 293 bad: usage(*argv); 294 } 295 mib[0] = CTL_NET; 296 mib[1] = PF_ROUTE; 297 mib[2] = 0; /* protocol */ 298 mib[3] = 0; /* wildcard address family */ 299 mib[4] = NET_RT_DUMP; 300 mib[5] = 0; /* no flags */ 301 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 302 err(1, "route-sysctl-estimate"); 303 if (needed == 0) 304 return 0; 305 if ((buf = malloc(needed)) == NULL) 306 err(1, "malloc"); 307 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 308 err(1, "actual retrieval of routing table"); 309 lim = buf + needed; 310 if (verbose) { 311 (void) printf("Examining routing table from sysctl\n"); 312 if (af) printf("(address family %s)\n", (*argv + 1)); 313 } 314 seqno = 0; /* ??? */ 315 for (next = buf; next < lim; next += rtm->rtm_msglen) { 316 rtm = (struct rt_msghdr *)next; 317 if (verbose) 318 print_rtmsg(rtm, rtm->rtm_msglen); 319 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 320 continue; 321 if (af) { 322 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 323 324 if (sa->sa_family != af) 325 continue; 326 } 327 if (debugonly) 328 continue; 329 rtm->rtm_type = RTM_DELETE; 330 rtm->rtm_seq = seqno; 331 rlen = write(sock, next, rtm->rtm_msglen); 332 if (rlen < (int)rtm->rtm_msglen) { 333 warn("write to routing socket, got %d for rlen", rlen); 334 break; 335 } 336 seqno++; 337 if (qflag) 338 continue; 339 if (verbose) 340 print_rtmsg(rtm, rlen); 341 else { 342 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 343 (void) printf("%-20.20s ", 344 routename(sa, NULL, rtm->rtm_flags)); 345 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 346 (void) printf("%-20.20s ", 347 routename(sa, NULL, RTF_HOST)); 348 (void) printf("done\n"); 349 } 350 } 351 return 0; 352 } 353 354 355 static char hexlist[] = "0123456789abcdef"; 356 357 static char * 358 any_ntoa(sa) 359 const struct sockaddr *sa; 360 { 361 static char obuf[64]; 362 const char *in; 363 char *out; 364 int len; 365 366 len = sa->sa_len; 367 in = sa->sa_data; 368 out = obuf; 369 370 do { 371 *out++ = hexlist[(*in >> 4) & 15]; 372 *out++ = hexlist[(*in++) & 15]; 373 *out++ = '.'; 374 } while (--len > 0); 375 out[-1] = '\0'; 376 return obuf; 377 } 378 379 380 int 381 netmask_length(nm, family) 382 struct sockaddr *nm; 383 int family; 384 { 385 static int 386 /* number of bits in a nibble */ 387 _t[] = { 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4 }, 388 /* good nibbles are 1111, 1110, 1100, 1000, 0000 */ 389 _g[] = { 1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,1 }; 390 int mask, good, zeroes, maskbytes, bit, i; 391 unsigned char *maskdata; 392 393 if (nm == NULL) 394 return 0; 395 396 mask = 0; 397 good = 1; 398 zeroes = 0; 399 400 switch (family) { 401 case AF_INET: { 402 struct sockaddr_in *nsin = (struct sockaddr_in *)nm; 403 maskdata = (unsigned char *) &nsin->sin_addr; 404 maskbytes = nsin->sin_len - 405 ((caddr_t)&nsin->sin_addr - (caddr_t)nsin); 406 break; 407 } 408 case AF_INET6: { 409 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nm; 410 maskdata = (unsigned char *) &sin6->sin6_addr; 411 maskbytes = sin6->sin6_len - 412 ((caddr_t)&sin6->sin6_addr - (caddr_t)sin6); 413 break; 414 } 415 default: 416 return 0; 417 } 418 419 /* 420 * Count the bits in the nibbles of the mask, and marking the 421 * netmask as not good (or at best, non-standard and very 422 * discouraged, in the case of AF_INET) if we find either of 423 * a nibble with non-contiguous bits, or a non-zero nibble 424 * after we've found a zero nibble. 425 */ 426 for (i = 0; i < maskbytes; i++) { 427 /* high nibble */ 428 mask += bit = _t[maskdata[i] >> 4]; 429 good &= _g[maskdata[i] >> 4]; 430 if (zeroes && bit) 431 good = 0; 432 if (bit == 0) 433 zeroes = 1; 434 /* low nibble */ 435 mask += bit = _t[maskdata[i] & 0xf]; 436 good &= _g[maskdata[i] & 0xf]; 437 if (zeroes && bit) 438 good = 0; 439 if (bit == 0) 440 zeroes = 1; 441 } 442 443 /* 444 * Always return the number of bits found, but as a negative 445 * if the mask wasn't one we like. 446 */ 447 return good ? mask : -mask; 448 } 449 450 char * 451 netmask_string(mask, len) 452 struct sockaddr *mask; 453 int len; 454 { 455 static char smask[16]; 456 457 if (len >= 0) 458 snprintf(smask, sizeof(smask), "%d", len); 459 else { 460 /* XXX AF_INET only?! */ 461 struct sockaddr_in nsin; 462 463 memset(&nsin, 0, sizeof(nsin)); 464 memcpy(&nsin, mask, mask->sa_len); 465 snprintf(smask, sizeof(smask), "%s", inet_ntoa(nsin.sin_addr)); 466 } 467 468 return smask; 469 } 470 471 472 char * 473 routename(sa, nm, flags) 474 struct sockaddr *sa, *nm; 475 int flags; 476 { 477 char *cp; 478 static char line[50]; 479 struct hostent *hp; 480 static char domain[MAXHOSTNAMELEN + 1]; 481 static int first = 1; 482 struct in_addr in; 483 int nml; 484 485 if ((flags & RTF_HOST) == 0) 486 return netname(sa, nm); 487 488 if (first) { 489 first = 0; 490 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 491 (cp = strchr(domain, '.'))) { 492 (void)strncpy(domain, cp + 1, sizeof(domain) - 1); 493 domain[sizeof(domain) - 1] = '\0'; 494 } else 495 domain[0] = 0; 496 } 497 498 if (sa->sa_len == 0) { 499 strncpy(line, "default", sizeof(line) - 1); 500 line[sizeof(line) - 1] = '\0'; 501 } else switch (sa->sa_family) { 502 503 case AF_INET: 504 in = ((struct sockaddr_in *)sa)->sin_addr; 505 nml = netmask_length(nm, AF_INET); 506 507 cp = 0; 508 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) { 509 if (nml == 0) 510 cp = "default"; 511 else { 512 static char notdefault[sizeof(NOTDEFSTRING)]; 513 514 snprintf(notdefault, sizeof(notdefault), 515 "0.0.0.0/%s", netmask_string(nm, nml)); 516 cp = notdefault; 517 } 518 } 519 if (cp == 0 && !nflag) { 520 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 521 AF_INET); 522 if (hp) { 523 if ((cp = strchr(hp->h_name, '.')) && 524 !strcmp(cp + 1, domain)) 525 *cp = 0; 526 cp = hp->h_name; 527 } 528 } 529 if (cp) 530 (void)strncpy(line, cp, sizeof(line) - 1); 531 else 532 (void)strncpy(line, inet_ntoa(in), sizeof(line) - 1); 533 line[sizeof(line) - 1] = '\0'; 534 break; 535 536 case AF_LINK: 537 return (link_ntoa((struct sockaddr_dl *)sa)); 538 539 #ifndef SMALL 540 #ifdef INET6 541 case AF_INET6: 542 { 543 struct sockaddr_in6 sin6; 544 int niflags; 545 546 #ifdef NI_WITHSCOPEID 547 niflags = NI_WITHSCOPEID; 548 #else 549 niflags = 0; 550 #endif 551 if (nflag) 552 niflags |= NI_NUMERICHOST; 553 memset(&sin6, 0, sizeof(sin6)); 554 memcpy(&sin6, sa, sa->sa_len); 555 sin6.sin6_len = sizeof(struct sockaddr_in6); 556 sin6.sin6_family = AF_INET6; 557 #ifdef __KAME__ 558 if (sa->sa_len == sizeof(struct sockaddr_in6) && 559 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 560 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 561 sin6.sin6_scope_id == 0) { 562 sin6.sin6_scope_id = 563 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 564 sin6.sin6_addr.s6_addr[2] = 0; 565 sin6.sin6_addr.s6_addr[3] = 0; 566 } 567 #endif 568 nml = netmask_length(nm, AF_INET6); 569 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 570 if (nml == 0) { 571 strncpy(line, "::", sizeof(line) - 1); 572 line[sizeof(line) - 1] = '\0'; 573 } 574 else 575 /* noncontiguous never happens in ipv6 */ 576 snprintf(line, sizeof(line), "::/%d", nml); 577 } 578 579 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 580 line, sizeof(line), NULL, 0, niflags) != 0) 581 strncpy(line, "invalid", sizeof(line)); 582 break; 583 } 584 #endif 585 586 case AF_NS: 587 return (ns_print((struct sockaddr_ns *)sa)); 588 589 case AF_ISO: 590 (void)snprintf(line, sizeof line, "iso %s", 591 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 592 break; 593 #endif /* SMALL */ 594 595 case AF_APPLETALK: 596 (void) snprintf(line, sizeof(line), "atalk %d.%d", 597 ((struct sockaddr_at *)sa)->sat_addr.s_net, 598 ((struct sockaddr_at *)sa)->sat_addr.s_node); 599 break; 600 601 default: 602 (void)snprintf(line, sizeof line, "(%d) %s", 603 sa->sa_family, any_ntoa(sa)); 604 break; 605 606 } 607 return (line); 608 } 609 610 /* 611 * Return the name of the network whose address is given. 612 * The address is assumed to be that of a net or subnet, not a host. 613 */ 614 char * 615 netname(sa, nm) 616 struct sockaddr *sa, *nm; 617 { 618 char *cp = 0; 619 static char line[50]; 620 struct netent *np = 0; 621 u_int32_t net, mask; 622 u_int32_t i; 623 int subnetshift, nml; 624 struct in_addr in; 625 626 switch (sa->sa_family) { 627 628 case AF_INET: 629 in = ((struct sockaddr_in *)sa)->sin_addr; 630 i = ntohl(in.s_addr); 631 nml = netmask_length(nm, AF_INET); 632 if (i == 0) { 633 if (nml == 0) 634 cp = "default"; 635 else { 636 static char notdefault[sizeof(NOTDEFSTRING)]; 637 638 snprintf(notdefault, sizeof(notdefault), 639 "0.0.0.0/%s", netmask_string(nm, nml)); 640 cp = notdefault; 641 } 642 } 643 else if (!nflag) { 644 if (IN_CLASSA(i)) { 645 mask = IN_CLASSA_NET; 646 subnetshift = 8; 647 } else if (IN_CLASSB(i)) { 648 mask = IN_CLASSB_NET; 649 subnetshift = 8; 650 } else { 651 mask = IN_CLASSC_NET; 652 subnetshift = 4; 653 } 654 /* 655 * If there are more bits than the standard mask 656 * would suggest, subnets must be in use. 657 * Guess at the subnet mask, assuming reasonable 658 * width subnet fields. 659 */ 660 while (i &~ mask) 661 mask = (int32_t)mask >> subnetshift; 662 net = i & mask; 663 while ((mask & 1) == 0) 664 mask >>= 1, net >>= 1; 665 np = getnetbyaddr(net, AF_INET); 666 if (np) 667 cp = np->n_name; 668 } 669 if (cp) { 670 (void)strncpy(line, cp, sizeof(line) - 1); 671 line[sizeof(line) - 1] = '\0'; 672 } else { 673 #if 0 /* XXX - This is silly... */ 674 #define C(x) ((x) & 0xff) 675 if ((i & 0xffffff) == 0) 676 (void)snprintf(line, sizeof line, "%u", 677 C(i >> 24)); 678 else if ((i & 0xffff) == 0) 679 (void)snprintf(line, sizeof line, "%u.%u", 680 C(i >> 24), C(i >> 16)); 681 else if ((i & 0xff) == 0) 682 (void)snprintf(line, sizeof line, "%u.%u.%u", 683 C(i >> 24), C(i >> 16), C(i >> 8)); 684 else 685 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", 686 C(i >> 24), C(i >> 16), C(i >> 8), C(i)); 687 #undef C 688 #else /* XXX */ 689 (void)strncpy(line, inet_ntoa(in), sizeof(line) - 1); 690 #endif /* XXX */ 691 } 692 break; 693 694 case AF_LINK: 695 return (link_ntoa((struct sockaddr_dl *)sa)); 696 697 #ifndef SMALL 698 #ifdef INET6 699 case AF_INET6: 700 { 701 struct sockaddr_in6 sin6; 702 int niflags; 703 704 #ifdef NI_WITHSCOPEID 705 niflags = NI_WITHSCOPEID; 706 #else 707 niflags = 0; 708 #endif 709 if (nflag) 710 niflags |= NI_NUMERICHOST; 711 memset(&sin6, 0, sizeof(sin6)); 712 memcpy(&sin6, sa, sa->sa_len); 713 sin6.sin6_len = sizeof(struct sockaddr_in6); 714 sin6.sin6_family = AF_INET6; 715 #ifdef __KAME__ 716 if (sa->sa_len == sizeof(struct sockaddr_in6) && 717 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 718 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 719 sin6.sin6_scope_id == 0) { 720 sin6.sin6_scope_id = 721 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 722 sin6.sin6_addr.s6_addr[2] = 0; 723 sin6.sin6_addr.s6_addr[3] = 0; 724 } 725 #endif 726 nml = netmask_length(nm, AF_INET6); 727 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 728 if (nml == 0) { 729 strncpy(line, "::", sizeof(line) - 1); 730 line[sizeof(line) - 1] = '\0'; 731 } 732 else 733 /* noncontiguous never happens in ipv6 */ 734 snprintf(line, sizeof(line), "::/%d", nml); 735 } 736 737 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 738 line, sizeof(line), NULL, 0, niflags) != 0) 739 strncpy(line, "invalid", sizeof(line)); 740 break; 741 } 742 #endif 743 744 case AF_NS: 745 return (ns_print((struct sockaddr_ns *)sa)); 746 747 case AF_ISO: 748 (void)snprintf(line, sizeof line, "iso %s", 749 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 750 break; 751 #endif /* SMALL */ 752 753 case AF_APPLETALK: 754 (void) snprintf(line, sizeof(line), "atalk %d.%d", 755 ((struct sockaddr_at *)sa)->sat_addr.s_net, 756 ((struct sockaddr_at *)sa)->sat_addr.s_node); 757 break; 758 759 default: 760 (void)snprintf(line, sizeof line, "af %d: %s", 761 sa->sa_family, any_ntoa(sa)); 762 break; 763 } 764 return (line); 765 } 766 767 static void 768 set_metric(value, key) 769 char *value; 770 int key; 771 { 772 int flag = 0; 773 u_long noval, *valp = &noval; 774 775 switch (key) { 776 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 777 caseof(K_MTU, RTV_MTU, rmx_mtu); 778 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 779 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 780 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 781 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 782 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 783 caseof(K_RTT, RTV_RTT, rmx_rtt); 784 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 785 } 786 rtm_inits |= flag; 787 if (lockrest || locking) 788 rt_metrics.rmx_locks |= flag; 789 if (locking) 790 locking = 0; 791 *valp = atoi(value); 792 } 793 794 static int 795 newroute(argc, argv) 796 int argc; 797 char **argv; 798 { 799 char *cmd, *dest = "", *gateway = ""; 800 const char *error; 801 int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC; 802 int key; 803 struct hostent *hp = 0; 804 805 cmd = argv[0]; 806 af = 0; 807 if (*cmd != 'g') 808 shutdown(sock, SHUT_RD); /* Don't want to read back our messages */ 809 while (--argc > 0) { 810 if (**(++argv)== '-') { 811 switch (key = keyword(1 + *argv)) { 812 813 case K_SA: 814 af = PF_ROUTE; 815 aflen = sizeof(union sockunion); 816 break; 817 818 case K_ATALK: 819 af = AF_APPLETALK; 820 aflen = sizeof(struct sockaddr_at); 821 break; 822 823 case K_INET: 824 af = AF_INET; 825 aflen = sizeof(struct sockaddr_in); 826 break; 827 828 #ifdef INET6 829 case K_INET6: 830 af = AF_INET6; 831 aflen = sizeof(struct sockaddr_in6); 832 break; 833 #endif 834 835 case K_LINK: 836 af = AF_LINK; 837 aflen = sizeof(struct sockaddr_dl); 838 break; 839 840 #ifndef SMALL 841 case K_OSI: 842 case K_ISO: 843 af = AF_ISO; 844 aflen = sizeof(struct sockaddr_iso); 845 break; 846 847 case K_X25: 848 af = AF_CCITT; 849 aflen = sizeof(struct sockaddr_x25); 850 break; 851 852 case K_XNS: 853 af = AF_NS; 854 aflen = sizeof(struct sockaddr_ns); 855 break; 856 #endif /* SMALL */ 857 858 case K_IFACE: 859 case K_INTERFACE: 860 iflag++; 861 break; 862 case K_NOSTATIC: 863 flags &= ~RTF_STATIC; 864 break; 865 case K_LLINFO: 866 flags |= RTF_LLINFO; 867 break; 868 case K_LOCK: 869 locking = 1; 870 break; 871 case K_LOCKREST: 872 lockrest = 1; 873 break; 874 case K_HOST: 875 forcehost++; 876 break; 877 case K_REJECT: 878 flags |= RTF_REJECT; 879 break; 880 case K_BLACKHOLE: 881 flags |= RTF_BLACKHOLE; 882 break; 883 case K_CLONED: 884 flags |= RTF_CLONED; 885 break; 886 case K_PROTO1: 887 flags |= RTF_PROTO1; 888 break; 889 case K_PROTO2: 890 flags |= RTF_PROTO2; 891 break; 892 case K_CLONING: 893 flags |= RTF_CLONING; 894 break; 895 case K_XRESOLVE: 896 flags |= RTF_XRESOLVE; 897 break; 898 case K_STATIC: 899 flags |= RTF_STATIC; 900 break; 901 case K_IFA: 902 if (!--argc) 903 usage(1+*argv); 904 (void) getaddr(RTA_IFA, *++argv, 0); 905 break; 906 case K_IFP: 907 if (!--argc) 908 usage(1+*argv); 909 (void) getaddr(RTA_IFP, *++argv, 0); 910 break; 911 case K_GENMASK: 912 if (!--argc) 913 usage(1+*argv); 914 (void) getaddr(RTA_GENMASK, *++argv, 0); 915 break; 916 case K_GATEWAY: 917 if (!--argc) 918 usage(1+*argv); 919 (void) getaddr(RTA_GATEWAY, *++argv, 0); 920 break; 921 case K_DST: 922 if (!--argc) 923 usage(1+*argv); 924 ishost = getaddr(RTA_DST, *++argv, &hp); 925 dest = *argv; 926 break; 927 case K_NETMASK: 928 if (!--argc) 929 usage(1+*argv); 930 (void) getaddr(RTA_NETMASK, *++argv, 0); 931 /* FALLTHROUGH */ 932 case K_NET: 933 forcenet++; 934 break; 935 case K_PREFIXLEN: 936 argc--; 937 if (prefixlen(*++argv) == 128) { 938 forcenet = 0; 939 ishost = 1; 940 } else { 941 forcenet = 1; 942 ishost = 0; 943 } 944 break; 945 case K_MTU: 946 case K_HOPCOUNT: 947 case K_EXPIRE: 948 case K_RECVPIPE: 949 case K_SENDPIPE: 950 case K_SSTHRESH: 951 case K_RTT: 952 case K_RTTVAR: 953 if (!--argc) 954 usage(1+*argv); 955 set_metric(*++argv, key); 956 break; 957 default: 958 usage(1+*argv); 959 } 960 } else { 961 if ((rtm_addrs & RTA_DST) == 0) { 962 dest = *argv; 963 ishost = getaddr(RTA_DST, *argv, &hp); 964 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 965 gateway = *argv; 966 (void) getaddr(RTA_GATEWAY, *argv, &hp); 967 } else { 968 ret = atoi(*argv); 969 970 if (ret == 0) { 971 if (!qflag && strcmp(*argv, "0") == 0) 972 warnx("%s, %s", 973 "old usage of trailing 0", 974 "assuming route to if"); 975 else 976 usage((char *)NULL); 977 iflag = 1; 978 continue; 979 } else if (ret > 0 && ret < 10) { 980 if (!qflag) { 981 warnx("%s, %s", 982 "old usage of trailing digit", 983 "assuming route via gateway"); 984 } 985 iflag = 0; 986 continue; 987 } 988 (void) getaddr(RTA_NETMASK, *argv, 0); 989 } 990 } 991 } 992 if (forcehost) 993 ishost = 1; 994 if (forcenet) 995 ishost = 0; 996 flags |= RTF_UP; 997 if (ishost) 998 flags |= RTF_HOST; 999 if (iflag == 0) 1000 flags |= RTF_GATEWAY; 1001 for (attempts = 1; ; attempts++) { 1002 errno = 0; 1003 if ((ret = rtmsg(*cmd, flags)) == 0) 1004 break; 1005 if (errno != ENETUNREACH && errno != ESRCH) 1006 break; 1007 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 1008 hp->h_addr_list++; 1009 memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0], 1010 hp->h_length); 1011 } else 1012 break; 1013 } 1014 if (*cmd == 'g') 1015 return rv; 1016 oerrno = errno; 1017 if (!qflag) { 1018 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 1019 if (*gateway) { 1020 (void) printf(": gateway %s", gateway); 1021 if (attempts > 1 && ret == 0 && af == AF_INET) 1022 (void) printf(" (%s)", 1023 inet_ntoa(so_gate.sin.sin_addr)); 1024 } 1025 if (ret == 0) 1026 (void) printf("\n"); 1027 } 1028 if (ret != 0) { 1029 switch (oerrno) { 1030 case ESRCH: 1031 error = "not in table"; 1032 break; 1033 case EBUSY: 1034 error = "entry in use"; 1035 break; 1036 case ENOBUFS: 1037 error = "routing table overflow"; 1038 break; 1039 default: 1040 error = strerror(oerrno); 1041 break; 1042 } 1043 (void) printf(": %s\n", error); 1044 return 1; 1045 } 1046 return 0; 1047 } 1048 1049 static void 1050 inet_makenetandmask(net, isin) 1051 u_int32_t net; 1052 struct sockaddr_in *isin; 1053 { 1054 u_int32_t addr, mask = 0; 1055 char *cp; 1056 1057 rtm_addrs |= RTA_NETMASK; 1058 if (net == 0) 1059 mask = addr = 0; 1060 else if (net < 128) { 1061 addr = net << IN_CLASSA_NSHIFT; 1062 mask = IN_CLASSA_NET; 1063 } else if (net < 65536) { 1064 addr = net << IN_CLASSB_NSHIFT; 1065 mask = IN_CLASSB_NET; 1066 } else if (net < 16777216L) { 1067 addr = net << IN_CLASSC_NSHIFT; 1068 mask = IN_CLASSC_NET; 1069 } else { 1070 addr = net; 1071 if ((addr & IN_CLASSA_HOST) == 0) 1072 mask = IN_CLASSA_NET; 1073 else if ((addr & IN_CLASSB_HOST) == 0) 1074 mask = IN_CLASSB_NET; 1075 else if ((addr & IN_CLASSC_HOST) == 0) 1076 mask = IN_CLASSC_NET; 1077 else 1078 mask = -1; 1079 } 1080 isin->sin_addr.s_addr = htonl(addr); 1081 isin = &so_mask.sin; 1082 isin->sin_addr.s_addr = htonl(mask); 1083 isin->sin_len = 0; 1084 isin->sin_family = 0; 1085 cp = (char *)(&isin->sin_addr + 1); 1086 while (*--cp == 0 && cp > (char *)isin) 1087 ; 1088 isin->sin_len = 1 + cp - (char *)isin; 1089 } 1090 1091 #ifdef INET6 1092 /* 1093 * XXX the function may need more improvement... 1094 */ 1095 static void 1096 inet6_makenetandmask(sin6) 1097 struct sockaddr_in6 *sin6; 1098 { 1099 char *plen; 1100 struct in6_addr in6; 1101 1102 plen = NULL; 1103 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1104 sin6->sin6_scope_id == 0) { 1105 plen = "0"; 1106 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1107 /* aggregatable global unicast - RFC2374 */ 1108 memset(&in6, 0, sizeof(in6)); 1109 if (!memcmp(&sin6->sin6_addr.s6_addr[8], &in6.s6_addr[8], 8)) 1110 plen = "64"; 1111 else 1112 plen = "128"; 1113 } 1114 1115 if (plen) { 1116 rtm_addrs |= RTA_NETMASK; 1117 prefixlen(plen); 1118 } 1119 } 1120 #endif 1121 1122 /* 1123 * Interpret an argument as a network address of some kind, 1124 * returning 1 if a host address, 0 if a network address. 1125 */ 1126 static int 1127 getaddr(which, s, hpp) 1128 int which; 1129 char *s; 1130 struct hostent **hpp; 1131 { 1132 sup su; 1133 struct hostent *hp; 1134 struct netent *np; 1135 u_int32_t val; 1136 char *t; 1137 int afamily; /* local copy of af so we can change it */ 1138 1139 if (af == 0) { 1140 af = AF_INET; 1141 aflen = sizeof(struct sockaddr_in); 1142 } 1143 afamily = af; 1144 rtm_addrs |= which; 1145 switch (which) { 1146 case RTA_DST: 1147 su = &so_dst; 1148 break; 1149 case RTA_GATEWAY: 1150 su = &so_gate; 1151 break; 1152 case RTA_NETMASK: 1153 su = &so_mask; 1154 break; 1155 case RTA_GENMASK: 1156 su = &so_genmask; 1157 break; 1158 case RTA_IFP: 1159 su = &so_ifp; 1160 afamily = AF_LINK; 1161 break; 1162 case RTA_IFA: 1163 su = &so_ifa; 1164 su->sa.sa_family = af; 1165 break; 1166 default: 1167 su = NULL; 1168 usage("Internal Error"); 1169 /*NOTREACHED*/ 1170 } 1171 su->sa.sa_len = aflen; 1172 su->sa.sa_family = afamily; /* cases that don't want it have left already */ 1173 if (strcmp(s, "default") == 0) { 1174 switch (which) { 1175 case RTA_DST: 1176 forcenet++; 1177 (void) getaddr(RTA_NETMASK, s, 0); 1178 break; 1179 case RTA_NETMASK: 1180 case RTA_GENMASK: 1181 su->sa.sa_len = 0; 1182 } 1183 return (0); 1184 } 1185 switch (afamily) { 1186 #ifndef SMALL 1187 #ifdef INET6 1188 case AF_INET6: 1189 { 1190 struct addrinfo hints, *res; 1191 1192 memset(&hints, 0, sizeof(hints)); 1193 hints.ai_family = afamily; /*AF_INET6*/ 1194 hints.ai_flags = AI_NUMERICHOST; 1195 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1196 if (getaddrinfo(s, "0", &hints, &res) != 0 || 1197 res->ai_family != AF_INET6 || 1198 res->ai_addrlen != sizeof(su->sin6)) { 1199 (void) fprintf(stderr, "%s: bad value\n", s); 1200 exit(1); 1201 } 1202 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1203 #ifdef __KAME__ 1204 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 1205 IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) && 1206 su->sin6.sin6_scope_id) { 1207 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 1208 htons(su->sin6.sin6_scope_id); 1209 su->sin6.sin6_scope_id = 0; 1210 } 1211 #endif 1212 if (which == RTA_DST) 1213 inet6_makenetandmask(&su->sin6); 1214 freeaddrinfo(res); 1215 return 0; 1216 } 1217 #endif 1218 1219 case AF_NS: 1220 if (which == RTA_DST) { 1221 struct sockaddr_ns *sms = &(so_mask.sns); 1222 memset(sms, 0, sizeof(*sms)); 1223 sms->sns_family = 0; 1224 sms->sns_len = 6; 1225 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 1226 rtm_addrs |= RTA_NETMASK; 1227 } 1228 su->sns.sns_addr = ns_addr(s); 1229 return (!ns_nullhost(su->sns.sns_addr)); 1230 1231 case AF_OSI: 1232 su->siso.siso_addr = *iso_addr(s); 1233 if (which == RTA_NETMASK || which == RTA_GENMASK) { 1234 char *cp = (char *)TSEL(&su->siso); 1235 su->siso.siso_nlen = 0; 1236 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 1237 su->siso.siso_len = 1 + cp - (char *)su; 1238 } 1239 return (1); 1240 1241 case AF_CCITT: 1242 ccitt_addr(s, &su->sx25); 1243 return (which == RTA_DST ? x25_makemask() : 1); 1244 #endif /* SMALL */ 1245 1246 case PF_ROUTE: 1247 su->sa.sa_len = sizeof(*su); 1248 sockaddr(s, &su->sa); 1249 return (1); 1250 1251 case AF_APPLETALK: 1252 t = strchr (s, '.'); 1253 if (!t) { 1254 badataddr: 1255 errx(1, "bad address: %s", s); 1256 } 1257 val = atoi (s); 1258 if (val > 65535) 1259 goto badataddr; 1260 su->sat.sat_addr.s_net = val; 1261 val = atoi (t); 1262 if (val > 256) 1263 goto badataddr; 1264 su->sat.sat_addr.s_node = val; 1265 rtm_addrs |= RTA_NETMASK; 1266 return(forcehost || su->sat.sat_addr.s_node != 0); 1267 1268 case AF_LINK: 1269 link_addr(s, &su->sdl); 1270 return (1); 1271 1272 case AF_INET: 1273 default: 1274 break; 1275 } 1276 1277 if (hpp == NULL) 1278 hpp = &hp; 1279 *hpp = NULL; 1280 if (((val = inet_addr(s)) != INADDR_NONE) && 1281 (which != RTA_DST || forcenet == 0)) { 1282 su->sin.sin_addr.s_addr = val; 1283 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1284 return (1); 1285 else { 1286 val = ntohl(val); 1287 goto netdone; 1288 } 1289 } 1290 if ((val = inet_network(s)) != INADDR_NONE || 1291 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) { 1292 netdone: 1293 if (which == RTA_DST) 1294 inet_makenetandmask(val, &su->sin); 1295 return (0); 1296 } 1297 hp = gethostbyname(s); 1298 if (hp) { 1299 *hpp = hp; 1300 su->sin.sin_family = hp->h_addrtype; 1301 memmove(&su->sin.sin_addr, hp->h_addr, hp->h_length); 1302 return (1); 1303 } 1304 errx(1, "bad value: %s", s); 1305 } 1306 1307 int 1308 prefixlen(s) 1309 char *s; 1310 { 1311 int len = atoi(s), q, r; 1312 int max; 1313 1314 switch (af) { 1315 case AF_INET: 1316 max = sizeof(struct in_addr) * 8; 1317 break; 1318 #ifdef INET6 1319 case AF_INET6: 1320 max = sizeof(struct in6_addr) * 8; 1321 break; 1322 #endif 1323 default: 1324 (void) fprintf(stderr, 1325 "prefixlen is not supported with af %d\n", af); 1326 exit(1); 1327 } 1328 1329 rtm_addrs |= RTA_NETMASK; 1330 if (len < -1 || len > max) { 1331 (void) fprintf(stderr, "%s: bad value\n", s); 1332 exit(1); 1333 } 1334 1335 q = len >> 3; 1336 r = len & 7; 1337 switch (af) { 1338 case AF_INET: 1339 memset(&so_mask, 0, sizeof(so_mask)); 1340 so_mask.sin.sin_family = AF_INET; 1341 so_mask.sin.sin_len = sizeof(struct sockaddr_in); 1342 so_mask.sin.sin_addr.s_addr = htonl(0xffffffff << (32 - len)); 1343 break; 1344 #ifdef INET6 1345 case AF_INET6: 1346 so_mask.sin6.sin6_family = AF_INET6; 1347 so_mask.sin6.sin6_len = sizeof(struct sockaddr_in6); 1348 memset((void *)&so_mask.sin6.sin6_addr, 0, 1349 sizeof(so_mask.sin6.sin6_addr)); 1350 if (q > 0) 1351 memset((void *)&so_mask.sin6.sin6_addr, 0xff, q); 1352 if (r > 0) 1353 *((u_char *)&so_mask.sin6.sin6_addr + q) = 1354 (0xff00 >> r) & 0xff; 1355 break; 1356 #endif 1357 } 1358 return(len); 1359 } 1360 1361 #ifndef SMALL 1362 int 1363 x25_makemask() 1364 { 1365 char *cp; 1366 1367 if ((rtm_addrs & RTA_NETMASK) == 0) { 1368 rtm_addrs |= RTA_NETMASK; 1369 for (cp = (char *)&so_mask.sx25.x25_net; 1370 cp < &so_mask.sx25.x25_opts.op_flags; cp++) 1371 *cp = -1; 1372 so_mask.sx25.x25_len = (u_char)&(((sup)0)->sx25.x25_opts); 1373 } 1374 return 0; 1375 } 1376 1377 1378 char * 1379 ns_print(sns) 1380 struct sockaddr_ns *sns; 1381 { 1382 struct ns_addr work; 1383 union { union ns_net net_e; u_int32_t int32_t_e; } net; 1384 u_short port; 1385 static char mybuf[50], cport[10], chost[25]; 1386 char *host = ""; 1387 char *p; 1388 u_char *q; 1389 1390 work = sns->sns_addr; 1391 port = ntohs(work.x_port); 1392 work.x_port = 0; 1393 net.net_e = work.x_net; 1394 if (ns_nullhost(work) && net.int32_t_e == 0) { 1395 if (!port) 1396 return ("*.*"); 1397 (void)snprintf(mybuf, sizeof mybuf, "*.%XH", port); 1398 return (mybuf); 1399 } 1400 1401 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) 1402 host = "any"; 1403 else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) 1404 host = "*"; 1405 else { 1406 q = work.x_host.c_host; 1407 (void)snprintf(chost, sizeof chost, "%02X%02X%02X%02X%02X%02XH", 1408 q[0], q[1], q[2], q[3], q[4], q[5]); 1409 for (p = chost; *p == '0' && p < chost + 12; p++) 1410 /* void */; 1411 host = p; 1412 } 1413 if (port) 1414 (void)snprintf(cport, sizeof cport, ".%XH", htons(port)); 1415 else 1416 *cport = 0; 1417 1418 (void)snprintf(mybuf, sizeof mybuf, "%XH.%s%s", 1419 (u_int32_t)ntohl(net.int32_t_e), host, cport); 1420 return (mybuf); 1421 } 1422 1423 static void 1424 interfaces() 1425 { 1426 size_t needed; 1427 int mib[6]; 1428 char *buf, *lim, *next; 1429 struct rt_msghdr *rtm; 1430 1431 mib[0] = CTL_NET; 1432 mib[1] = PF_ROUTE; 1433 mib[2] = 0; /* protocol */ 1434 mib[3] = 0; /* wildcard address family */ 1435 mib[4] = NET_RT_IFLIST; 1436 mib[5] = 0; /* no flags */ 1437 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1438 err(1, "route-sysctl-estimate"); 1439 if ((buf = malloc(needed)) == NULL) 1440 err(1, "malloc"); 1441 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 1442 err(1, "actual retrieval of interface table"); 1443 lim = buf + needed; 1444 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1445 rtm = (struct rt_msghdr *)next; 1446 print_rtmsg(rtm, rtm->rtm_msglen); 1447 } 1448 } 1449 1450 static void 1451 monitor() 1452 { 1453 int n; 1454 char msg[2048]; 1455 1456 verbose = 1; 1457 if (debugonly) { 1458 interfaces(); 1459 exit(0); 1460 } 1461 for(;;) { 1462 time_t now; 1463 n = read(sock, msg, 2048); 1464 now = time(NULL); 1465 (void) printf("got message of size %d on %s", n, ctime(&now)); 1466 print_rtmsg((struct rt_msghdr *)msg, n); 1467 } 1468 } 1469 1470 #endif /* SMALL */ 1471 1472 1473 struct { 1474 struct rt_msghdr m_rtm; 1475 char m_space[512]; 1476 } m_rtmsg; 1477 1478 static int 1479 rtmsg(cmd, flags) 1480 int cmd, flags; 1481 { 1482 static int seq; 1483 int rlen; 1484 char *cp = m_rtmsg.m_space; 1485 int l; 1486 1487 #define NEXTADDR(w, u) \ 1488 if (rtm_addrs & (w)) {\ 1489 l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\ 1490 if (verbose && ! shortoutput) sodump(&(u),"u");\ 1491 } 1492 1493 errno = 0; 1494 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1495 if (cmd == 'a') 1496 cmd = RTM_ADD; 1497 else if (cmd == 'c') 1498 cmd = RTM_CHANGE; 1499 else if (cmd == 'g') { 1500 #ifdef SMALL 1501 return (-1); 1502 #else /* SMALL */ 1503 cmd = RTM_GET; 1504 if (so_ifp.sa.sa_family == 0) { 1505 so_ifp.sa.sa_family = AF_LINK; 1506 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1507 rtm_addrs |= RTA_IFP; 1508 } 1509 #endif /* SMALL */ 1510 } else 1511 cmd = RTM_DELETE; 1512 #define rtm m_rtmsg.m_rtm 1513 rtm.rtm_type = cmd; 1514 rtm.rtm_flags = flags; 1515 rtm.rtm_version = RTM_VERSION; 1516 rtm.rtm_seq = ++seq; 1517 rtm.rtm_addrs = rtm_addrs; 1518 rtm.rtm_rmx = rt_metrics; 1519 rtm.rtm_inits = rtm_inits; 1520 1521 if (rtm_addrs & RTA_NETMASK) 1522 mask_addr(); 1523 NEXTADDR(RTA_DST, so_dst); 1524 NEXTADDR(RTA_GATEWAY, so_gate); 1525 NEXTADDR(RTA_NETMASK, so_mask); 1526 NEXTADDR(RTA_GENMASK, so_genmask); 1527 NEXTADDR(RTA_IFP, so_ifp); 1528 NEXTADDR(RTA_IFA, so_ifa); 1529 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1530 if (verbose && ! shortoutput) 1531 print_rtmsg(&rtm, l); 1532 if (debugonly) 1533 return (0); 1534 if ((rlen = write(sock, (char *)&m_rtmsg, l)) < 0) { 1535 perror("writing to routing socket"); 1536 return (-1); 1537 } 1538 #ifndef SMALL 1539 if (cmd == RTM_GET) { 1540 do { 1541 l = read(sock, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1542 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1543 if (l < 0) 1544 err(1, "read from routing socket"); 1545 else 1546 print_getmsg(&rtm, l); 1547 } 1548 #endif /* SMALL */ 1549 #undef rtm 1550 return (0); 1551 } 1552 1553 static void 1554 mask_addr() 1555 { 1556 int olen = so_mask.sa.sa_len; 1557 char *cp1 = olen + (char *)&so_mask, *cp2; 1558 1559 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1560 if (*--cp1 != 0) { 1561 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1562 break; 1563 } 1564 if ((rtm_addrs & RTA_DST) == 0) 1565 return; 1566 switch (so_dst.sa.sa_family) { 1567 case AF_INET: 1568 #ifdef INET6 1569 case AF_INET6: 1570 #endif 1571 case AF_APPLETALK: 1572 #ifndef SMALL 1573 case AF_NS: 1574 case AF_CCITT: 1575 #endif /* SMALL */ 1576 case 0: 1577 return; 1578 #ifndef SMALL 1579 case AF_ISO: 1580 olen = MIN(so_dst.siso.siso_nlen, 1581 MAX(so_mask.sa.sa_len - 6, 0)); 1582 break; 1583 #endif /* SMALL */ 1584 } 1585 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1586 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1587 while (cp2 > cp1) 1588 *--cp2 = 0; 1589 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1590 while (cp1 > so_dst.sa.sa_data) 1591 *--cp1 &= *--cp2; 1592 #ifndef SMALL 1593 switch (so_dst.sa.sa_family) { 1594 case AF_ISO: 1595 so_dst.siso.siso_nlen = olen; 1596 break; 1597 } 1598 #endif /* SMALL */ 1599 } 1600 1601 char *msgtypes[] = { 1602 "", 1603 "RTM_ADD: Add Route", 1604 "RTM_DELETE: Delete Route", 1605 "RTM_CHANGE: Change Metrics or flags", 1606 "RTM_GET: Report Metrics", 1607 "RTM_LOSING: Kernel Suspects Partitioning", 1608 "RTM_REDIRECT: Told to use different route", 1609 "RTM_MISS: Lookup failed on this address", 1610 "RTM_LOCK: fix specified metrics", 1611 "RTM_OLDADD: caused by SIOCADDRT", 1612 "RTM_OLDDEL: caused by SIOCDELRT", 1613 "RTM_RESOLVE: Route created by cloning", 1614 "RTM_NEWADDR: address being added to iface", 1615 "RTM_DELADDR: address being removed from iface", 1616 "RTM_OIFINFO: iface status change (pre-1.5)", 1617 "RTM_IFINFO: iface status change", 1618 "RTM_IFANNOUNCE: iface arrival/departure", 1619 0, 1620 }; 1621 1622 char metricnames[] = 1623 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 1624 char routeflags[] = 1625 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016CLONED\017PROTO2\020PROTO1"; 1626 char ifnetflags[] = 1627 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST"; 1628 char addrnames[] = 1629 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1630 1631 static void 1632 print_rtmsg(rtm, msglen) 1633 struct rt_msghdr *rtm; 1634 int msglen; 1635 { 1636 struct if_msghdr *ifm; 1637 struct ifa_msghdr *ifam; 1638 struct if_announcemsghdr *ifan; 1639 1640 if (verbose == 0) 1641 return; 1642 if (rtm->rtm_version != RTM_VERSION) { 1643 (void) printf("routing message version %d not understood\n", 1644 rtm->rtm_version); 1645 return; 1646 } 1647 if (msgtypes[rtm->rtm_type]) 1648 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1649 else 1650 (void)printf("#%d: ", rtm->rtm_type); 1651 (void)printf("len %d, ", rtm->rtm_msglen); 1652 switch (rtm->rtm_type) { 1653 case RTM_IFINFO: 1654 ifm = (struct if_msghdr *)rtm; 1655 (void) printf("if# %d, flags:", ifm->ifm_index); 1656 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1657 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1658 break; 1659 case RTM_NEWADDR: 1660 case RTM_DELADDR: 1661 ifam = (struct ifa_msghdr *)rtm; 1662 (void) printf("metric %d, flags:", ifam->ifam_metric); 1663 bprintf(stdout, ifam->ifam_flags, routeflags); 1664 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1665 break; 1666 case RTM_IFANNOUNCE: 1667 ifan = (struct if_announcemsghdr *)rtm; 1668 (void) printf("if# %d, what: ", ifan->ifan_index); 1669 switch (ifan->ifan_what) { 1670 case IFAN_ARRIVAL: 1671 printf("arrival"); 1672 break; 1673 case IFAN_DEPARTURE: 1674 printf("departure"); 1675 break; 1676 default: 1677 printf("#%d", ifan->ifan_what); 1678 break; 1679 } 1680 printf("\n"); 1681 break; 1682 default: 1683 (void) printf("pid: %d, seq %d, errno %d, flags:", 1684 rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1685 bprintf(stdout, rtm->rtm_flags, routeflags); 1686 pmsg_common(rtm); 1687 } 1688 } 1689 1690 #ifndef SMALL 1691 static void 1692 print_getmsg(rtm, msglen) 1693 struct rt_msghdr *rtm; 1694 int msglen; 1695 { 1696 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL, *ifa = NULL; 1697 struct sockaddr_dl *ifp = NULL; 1698 struct sockaddr *sa; 1699 char *cp; 1700 int i; 1701 1702 if (! shortoutput) 1703 (void) printf(" route to: %s\n", 1704 routename((struct sockaddr *) &so_dst, NULL, RTF_HOST)); 1705 if (rtm->rtm_version != RTM_VERSION) { 1706 warnx("routing message version %d not understood", 1707 rtm->rtm_version); 1708 return; 1709 } 1710 if (rtm->rtm_msglen > msglen) { 1711 warnx("message length mismatch, in packet %d, returned %d\n", 1712 rtm->rtm_msglen, msglen); 1713 } 1714 if (rtm->rtm_errno) { 1715 warn("RTM_GET"); 1716 return; 1717 } 1718 cp = ((char *)(rtm + 1)); 1719 if (rtm->rtm_addrs) 1720 for (i = 1; i; i <<= 1) 1721 if (i & rtm->rtm_addrs) { 1722 sa = (struct sockaddr *)cp; 1723 switch (i) { 1724 case RTA_DST: 1725 dst = sa; 1726 break; 1727 case RTA_GATEWAY: 1728 gate = sa; 1729 break; 1730 case RTA_NETMASK: 1731 mask = sa; 1732 break; 1733 case RTA_IFP: 1734 if (sa->sa_family == AF_LINK && 1735 ((struct sockaddr_dl *)sa)->sdl_nlen) 1736 ifp = (struct sockaddr_dl *)sa; 1737 break; 1738 case RTA_IFA: 1739 ifa = sa; 1740 break; 1741 } 1742 ADVANCE(cp, sa); 1743 } 1744 if (dst && mask) 1745 mask->sa_family = dst->sa_family; /* XXX */ 1746 if (dst && ! shortoutput) 1747 (void)printf("destination: %s\n", 1748 routename(dst, mask, RTF_HOST)); 1749 if (mask && ! shortoutput) { 1750 int savenflag = nflag; 1751 1752 nflag = 1; 1753 (void)printf(" mask: %s\n", 1754 routename(mask, NULL, RTF_HOST)); 1755 nflag = savenflag; 1756 } 1757 if (gate && rtm->rtm_flags & RTF_GATEWAY && ! shortoutput) 1758 (void)printf(" gateway: %s\n", 1759 routename(gate, NULL, RTF_HOST)); 1760 if (ifa && ! shortoutput) 1761 (void)printf(" local addr: %s\n", 1762 routename(ifa, NULL, RTF_HOST)); 1763 if (ifp && ! shortoutput) 1764 (void)printf(" interface: %.*s\n", 1765 ifp->sdl_nlen, ifp->sdl_data); 1766 if (! shortoutput) { 1767 (void)printf(" flags: "); 1768 bprintf(stdout, rtm->rtm_flags, routeflags); 1769 } 1770 1771 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1772 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1773 1774 if (! shortoutput) { 1775 (void) printf("\n%s\n", "\ 1776 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1777 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1778 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1779 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1780 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1781 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1782 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1783 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1784 if (rtm->rtm_rmx.rmx_expire) 1785 rtm->rtm_rmx.rmx_expire -= time(0); 1786 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1787 } 1788 #undef lock 1789 #undef msec 1790 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1791 1792 if ((rtm->rtm_addrs & RTF_GATEWAY) == 0) 1793 rv = 1; 1794 else { 1795 char *name; 1796 int addrs; 1797 1798 cp = (char *)(rtm + 1); 1799 addrs = rtm->rtm_addrs; 1800 1801 for (i = 1; i; i <<= 1) { 1802 sa = (struct sockaddr *)cp; 1803 if (i == RTF_GATEWAY) { 1804 name = routename(sa, NULL, RTF_HOST); 1805 if (name[0] == '\0') 1806 rv = 1; 1807 else if (shortoutput) 1808 printf("%s\n", name); 1809 } 1810 if (i & addrs) 1811 ADVANCE(cp, sa); 1812 } 1813 } 1814 1815 if (shortoutput) 1816 return; 1817 else if (verbose) 1818 pmsg_common(rtm); 1819 else if (rtm->rtm_addrs &~ RTA_IGN) { 1820 (void) printf("sockaddrs: "); 1821 bprintf(stdout, rtm->rtm_addrs, addrnames); 1822 putchar('\n'); 1823 } 1824 #undef RTA_IGN 1825 } 1826 #endif /* SMALL */ 1827 1828 void 1829 pmsg_common(rtm) 1830 struct rt_msghdr *rtm; 1831 { 1832 (void) printf("\nlocks: "); 1833 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1834 (void) printf(" inits: "); 1835 bprintf(stdout, rtm->rtm_inits, metricnames); 1836 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1837 } 1838 1839 static void 1840 pmsg_addrs(cp, addrs) 1841 char *cp; 1842 int addrs; 1843 { 1844 struct sockaddr *sa; 1845 int i; 1846 1847 if (addrs != 0) { 1848 (void) printf("\nsockaddrs: "); 1849 bprintf(stdout, addrs, addrnames); 1850 (void) putchar('\n'); 1851 for (i = 1; i; i <<= 1) 1852 if (i & addrs) { 1853 sa = (struct sockaddr *)cp; 1854 (void) printf(" %s", 1855 routename(sa, NULL, RTF_HOST)); 1856 ADVANCE(cp, sa); 1857 } 1858 } 1859 (void) putchar('\n'); 1860 (void) fflush(stdout); 1861 } 1862 1863 static void 1864 bprintf(fp, b, s) 1865 FILE *fp; 1866 int b; 1867 u_char *s; 1868 { 1869 int i; 1870 int gotsome = 0; 1871 1872 if (b == 0) 1873 return; 1874 while ((i = *s++) != 0) { 1875 if (b & (1 << (i-1))) { 1876 if (gotsome == 0) 1877 i = '<'; 1878 else 1879 i = ','; 1880 (void) putc(i, fp); 1881 gotsome = 1; 1882 for (; (i = *s) > 32; s++) 1883 (void) putc(i, fp); 1884 } else 1885 while (*s > 32) 1886 s++; 1887 } 1888 if (gotsome) 1889 (void) putc('>', fp); 1890 } 1891 1892 static int 1893 keyword(cp) 1894 char *cp; 1895 { 1896 struct keytab *kt = keywords; 1897 1898 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1899 kt++; 1900 return kt->kt_i; 1901 } 1902 1903 static void 1904 sodump(su, which) 1905 sup su; 1906 char *which; 1907 { 1908 #ifdef INET6 1909 char ntop_buf[NI_MAXHOST]; 1910 #endif 1911 1912 switch (su->sa.sa_family) { 1913 case AF_INET: 1914 (void) printf("%s: inet %s; ", 1915 which, inet_ntoa(su->sin.sin_addr)); 1916 break; 1917 case AF_APPLETALK: 1918 (void) printf("%s: atalk %d.%d; ", 1919 which, su->sat.sat_addr.s_net, su->sat.sat_addr.s_node); 1920 break; 1921 case AF_LINK: 1922 (void) printf("%s: link %s; ", 1923 which, link_ntoa(&su->sdl)); 1924 break; 1925 #ifndef SMALL 1926 #ifdef INET6 1927 case AF_INET6: 1928 (void) printf("%s: inet6 %s; ", 1929 which, inet_ntop(AF_INET6, &su->sin6.sin6_addr, 1930 ntop_buf, sizeof(ntop_buf))); 1931 break; 1932 #endif 1933 case AF_ISO: 1934 (void) printf("%s: iso %s; ", 1935 which, iso_ntoa(&su->siso.siso_addr)); 1936 break; 1937 case AF_NS: 1938 (void) printf("%s: xns %s; ", 1939 which, ns_ntoa(su->sns.sns_addr)); 1940 break; 1941 #endif /* SMALL */ 1942 default: 1943 (void) printf("af %p: %s; ", 1944 which, any_ntoa(&su->sa)); 1945 } 1946 (void) fflush(stdout); 1947 } 1948 1949 /* States*/ 1950 #define VIRGIN 0 1951 #define GOTONE 1 1952 #define GOTTWO 2 1953 /* Inputs */ 1954 #define DIGIT (4*0) 1955 #define END (4*1) 1956 #define DELIM (4*2) 1957 1958 static void 1959 sockaddr(addr, sa) 1960 char *addr; 1961 struct sockaddr *sa; 1962 { 1963 char *cp = (char *)sa; 1964 int size = sa->sa_len; 1965 char *cplim = cp + size; 1966 int byte = 0, state = VIRGIN, new = 0; 1967 1968 (void) memset(cp, 0, size); 1969 cp++; 1970 do { 1971 if ((*addr >= '0') && (*addr <= '9')) { 1972 new = *addr - '0'; 1973 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1974 new = *addr - 'a' + 10; 1975 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1976 new = *addr - 'A' + 10; 1977 } else if (*addr == 0) 1978 state |= END; 1979 else 1980 state |= DELIM; 1981 addr++; 1982 switch (state /* | INPUT */) { 1983 case GOTTWO | DIGIT: 1984 *cp++ = byte; /*FALLTHROUGH*/ 1985 case VIRGIN | DIGIT: 1986 state = GOTONE; byte = new; continue; 1987 case GOTONE | DIGIT: 1988 state = GOTTWO; byte = new + (byte << 4); continue; 1989 default: /* | DELIM */ 1990 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1991 case GOTONE | END: 1992 case GOTTWO | END: 1993 *cp++ = byte; /* FALLTHROUGH */ 1994 case VIRGIN | END: 1995 break; 1996 } 1997 break; 1998 } while (cp < cplim); 1999 sa->sa_len = cp - (char *)sa; 2000 } 2001
Indexes created Fri Sep 26 08:10:20 GMT 2025