route.c revision 1.75
1 /* $NetBSD: route.c,v 1.75 2005/02/05 14:05:23 xtraeme 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1983, 1989, 1991, 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)route.c 8.6 (Berkeley) 4/28/95"; 41 #else 42 __RCSID("$NetBSD: route.c,v 1.75 2005/02/05 14:05:23 xtraeme Exp $"); 43 #endif 44 #endif /* not lint */ 45 46 #include <sys/param.h> 47 #include <sys/file.h> 48 #include <sys/socket.h> 49 #include <sys/ioctl.h> 50 #include <sys/mbuf.h> 51 #include <sys/sysctl.h> 52 53 #include <net/if.h> 54 #include <net/route.h> 55 #include <net/if_dl.h> 56 #include <netinet/in.h> 57 #include <netatalk/at.h> 58 #include <netns/ns.h> 59 #include <netiso/iso.h> 60 #include <netccitt/x25.h> 61 #include <arpa/inet.h> 62 #include <netdb.h> 63 64 #include <errno.h> 65 #include <unistd.h> 66 #include <stdio.h> 67 #include <ctype.h> 68 #include <stdlib.h> 69 #include <string.h> 70 #include <time.h> 71 #include <paths.h> 72 #include <err.h> 73 74 #include "keywords.h" 75 #include "extern.h" 76 77 typedef union sockunion *sup; 78 79 static void usage(char *)__attribute__((__noreturn__)); 80 static char *any_ntoa(const struct sockaddr *); 81 static void set_metric(char *, int); 82 static int newroute(int, char **); 83 static void inet_makenetandmask(u_int32_t, struct sockaddr_in *); 84 #ifdef INET6 85 static int inet6_makenetandmask(struct sockaddr_in6 *); 86 #endif 87 static int getaddr(int, char *, struct hostent **); 88 static int flushroutes(int, char *[], int); 89 #ifndef SMALL 90 static int prefixlen(char *); 91 static int x25_makemask(void); 92 static void interfaces(void); 93 static void monitor(void); 94 static void print_getmsg(struct rt_msghdr *, int); 95 static const char *linkstate(struct if_msghdr *); 96 #endif /* SMALL */ 97 static int rtmsg(int, int ); 98 static void mask_addr(void); 99 static void print_rtmsg(struct rt_msghdr *, int); 100 static void pmsg_common(struct rt_msghdr *); 101 static void pmsg_addrs(char *, int); 102 static void bprintf(FILE *, int, u_char *); 103 static int keyword(char *); 104 static void sodump(sup, char *); 105 static void sockaddr(char *, struct sockaddr *); 106 107 union sockunion { 108 struct sockaddr sa; 109 struct sockaddr_in sin; 110 #ifdef INET6 111 struct sockaddr_in6 sin6; 112 #endif 113 struct sockaddr_at sat; 114 struct sockaddr_dl sdl; 115 #ifndef SMALL 116 struct sockaddr_ns sns; 117 struct sockaddr_iso siso; 118 struct sockaddr_x25 sx25; 119 #endif /* SMALL */ 120 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp; 121 122 int pid, rtm_addrs; 123 int sock; 124 int forcehost, forcenet, doflush, nflag, af, qflag, tflag; 125 int iflag, verbose, aflen = sizeof (struct sockaddr_in); 126 int locking, lockrest, debugonly, shortoutput, rv; 127 struct rt_metrics rt_metrics; 128 u_int32_t rtm_inits; 129 short ns_nullh[] = {0,0,0}; 130 short ns_bh[] = {-1,-1,-1}; 131 132 133 static void 134 usage(char *cp) 135 { 136 137 if (cp) 138 warnx("botched keyword: %s", cp); 139 (void) fprintf(stderr, 140 "usage: %s [ -fnqvs ] cmd [[ -<qualifers> ] args ]\n", 141 getprogname()); 142 exit(1); 143 /* NOTREACHED */ 144 } 145 146 #define ROUNDUP(a) \ 147 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 148 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 149 150 int 151 main(int argc, char **argv) 152 { 153 int ch; 154 155 if (argc < 2) 156 usage(NULL); 157 158 while ((ch = getopt(argc, argv, "fnqvdts")) != -1) 159 switch(ch) { 160 case 'f': 161 doflush = 1; 162 break; 163 case 'n': 164 nflag = 1; 165 break; 166 case 'q': 167 qflag = 1; 168 break; 169 case 'v': 170 verbose = 1; 171 break; 172 case 't': 173 tflag = 1; 174 break; 175 case 'd': 176 debugonly = 1; 177 break; 178 case 's': 179 shortoutput = 1; 180 break; 181 case '?': 182 default: 183 usage(NULL); 184 /*NOTREACHED*/ 185 } 186 argc -= optind; 187 argv += optind; 188 189 pid = getpid(); 190 if (tflag) 191 sock = open("/dev/null", O_WRONLY, 0); 192 else 193 sock = socket(PF_ROUTE, SOCK_RAW, 0); 194 if (sock < 0) 195 err(1, "socket"); 196 197 if (*argv == NULL) { 198 if (doflush) 199 ch = K_FLUSH; 200 else 201 goto no_cmd; 202 } else 203 ch = keyword(*argv); 204 205 switch (ch) { 206 #ifndef SMALL 207 case K_GET: 208 #endif /* SMALL */ 209 case K_CHANGE: 210 case K_ADD: 211 case K_DELETE: 212 if (doflush) 213 (void)flushroutes(1, argv, 0); 214 return newroute(argc, argv); 215 216 case K_SHOW: 217 show(argc, argv); 218 return 0; 219 220 #ifndef SMALL 221 case K_MONITOR: 222 monitor(); 223 return 0; 224 225 #endif /* SMALL */ 226 case K_FLUSH: 227 return flushroutes(argc, argv, 0); 228 229 case K_FLUSHALL: 230 return flushroutes(argc, argv, 1); 231 no_cmd: 232 default: 233 usage(*argv); 234 /*NOTREACHED*/ 235 } 236 } 237 238 /* 239 * Purge all entries in the routing tables not 240 * associated with network interfaces. 241 */ 242 static int 243 flushroutes(int argc, char *argv[], int doall) 244 { 245 size_t needed; 246 int mib[6], rlen, seqno; 247 char *buf, *next, *lim; 248 struct rt_msghdr *rtm; 249 250 af = 0; 251 shutdown(sock, SHUT_RD); /* Don't want to read back our messages */ 252 if (argc > 1) { 253 argv++; 254 if (argc == 2 && **argv == '-') 255 switch (keyword(*argv + 1)) { 256 case K_INET: 257 af = AF_INET; 258 break; 259 #ifdef INET6 260 case K_INET6: 261 af = AF_INET6; 262 break; 263 #endif 264 #ifndef SMALL 265 case K_ATALK: 266 af = AF_APPLETALK; 267 break; 268 case K_XNS: 269 af = AF_NS; 270 break; 271 #endif /* SMALL */ 272 case K_LINK: 273 af = AF_LINK; 274 break; 275 #ifndef SMALL 276 case K_ISO: 277 case K_OSI: 278 af = AF_ISO; 279 break; 280 case K_X25: 281 af = AF_CCITT; 282 #endif /* SMALL */ 283 default: 284 goto bad; 285 } else 286 bad: usage(*argv); 287 } 288 mib[0] = CTL_NET; 289 mib[1] = PF_ROUTE; 290 mib[2] = 0; /* protocol */ 291 mib[3] = 0; /* wildcard address family */ 292 mib[4] = NET_RT_DUMP; 293 mib[5] = 0; /* no flags */ 294 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 295 err(1, "route-sysctl-estimate"); 296 if (needed == 0) 297 return 0; 298 if ((buf = malloc(needed)) == NULL) 299 err(1, "malloc"); 300 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 301 err(1, "actual retrieval of routing table"); 302 lim = buf + needed; 303 if (verbose) { 304 (void) printf("Examining routing table from sysctl\n"); 305 if (af) printf("(address family %s)\n", (*argv + 1)); 306 } 307 seqno = 0; /* ??? */ 308 for (next = buf; next < lim; next += rtm->rtm_msglen) { 309 rtm = (struct rt_msghdr *)next; 310 if (verbose) 311 print_rtmsg(rtm, rtm->rtm_msglen); 312 if (!(rtm->rtm_flags & (RTF_GATEWAY | RTF_STATIC | 313 RTF_LLINFO)) && !doall) 314 continue; 315 if (af) { 316 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 317 318 if (sa->sa_family != af) 319 continue; 320 } 321 if (debugonly) 322 continue; 323 rtm->rtm_type = RTM_DELETE; 324 rtm->rtm_seq = seqno; 325 rlen = write(sock, next, rtm->rtm_msglen); 326 if (rlen < (int)rtm->rtm_msglen) { 327 warn("write to routing socket, got %d for rlen", rlen); 328 break; 329 } 330 seqno++; 331 if (qflag) 332 continue; 333 if (verbose) 334 print_rtmsg(rtm, rlen); 335 else { 336 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 337 (void) printf("%-20.20s ", 338 routename(sa, NULL, rtm->rtm_flags)); 339 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 340 (void) printf("%-20.20s ", 341 routename(sa, NULL, RTF_HOST)); 342 (void) printf("done\n"); 343 } 344 } 345 return 0; 346 } 347 348 349 static char hexlist[] = "0123456789abcdef"; 350 351 static char * 352 any_ntoa(const struct sockaddr *sa) 353 { 354 static char obuf[3 * 256]; 355 const char *in; 356 char *out; 357 int len; 358 359 len = sa->sa_len - offsetof(struct sockaddr, sa_data); 360 in = sa->sa_data; 361 out = obuf; 362 363 do { 364 *out++ = hexlist[(*in >> 4) & 15]; 365 *out++ = hexlist[(*in++) & 15]; 366 *out++ = '.'; 367 } while (--len > 0); 368 out[-1] = '\0'; 369 return obuf; 370 } 371 372 373 int 374 netmask_length(struct sockaddr *nm, int family) 375 { 376 static int 377 /* number of bits in a nibble */ 378 _t[] = { 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4 }, 379 /* good nibbles are 1111, 1110, 1100, 1000, 0000 */ 380 _g[] = { 1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,1 }; 381 int mask, good, zeroes, maskbytes, bit, i; 382 unsigned char *maskdata; 383 384 if (nm == NULL) 385 return 0; 386 387 mask = 0; 388 good = 1; 389 zeroes = 0; 390 391 switch (family) { 392 case AF_INET: { 393 struct sockaddr_in *nsin = (struct sockaddr_in *)nm; 394 maskdata = (unsigned char *) &nsin->sin_addr; 395 maskbytes = nsin->sin_len - 396 ((caddr_t)&nsin->sin_addr - (caddr_t)nsin); 397 break; 398 } 399 case AF_INET6: { 400 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nm; 401 maskdata = (unsigned char *) &sin6->sin6_addr; 402 maskbytes = sin6->sin6_len - 403 ((caddr_t)&sin6->sin6_addr - (caddr_t)sin6); 404 break; 405 } 406 default: 407 return 0; 408 } 409 410 /* 411 * Count the bits in the nibbles of the mask, and marking the 412 * netmask as not good (or at best, non-standard and very 413 * discouraged, in the case of AF_INET) if we find either of 414 * a nibble with non-contiguous bits, or a non-zero nibble 415 * after we've found a zero nibble. 416 */ 417 for (i = 0; i < maskbytes; i++) { 418 /* high nibble */ 419 mask += bit = _t[maskdata[i] >> 4]; 420 good &= _g[maskdata[i] >> 4]; 421 if (zeroes && bit) 422 good = 0; 423 if (bit == 0) 424 zeroes = 1; 425 /* low nibble */ 426 mask += bit = _t[maskdata[i] & 0xf]; 427 good &= _g[maskdata[i] & 0xf]; 428 if (zeroes && bit) 429 good = 0; 430 if (bit == 0) 431 zeroes = 1; 432 } 433 434 /* 435 * Always return the number of bits found, but as a negative 436 * if the mask wasn't one we like. 437 */ 438 return good ? mask : -mask; 439 } 440 441 char * 442 netmask_string(struct sockaddr *mask, int len) 443 { 444 static char smask[16]; 445 446 if (len >= 0) 447 snprintf(smask, sizeof(smask), "%d", len); 448 else { 449 /* XXX AF_INET only?! */ 450 struct sockaddr_in nsin; 451 452 memset(&nsin, 0, sizeof(nsin)); 453 memcpy(&nsin, mask, mask->sa_len); 454 snprintf(smask, sizeof(smask), "%s", inet_ntoa(nsin.sin_addr)); 455 } 456 457 return smask; 458 } 459 460 461 char * 462 routename(struct sockaddr *sa, struct sockaddr *nm, int flags) 463 { 464 char *cp; 465 static char line[50]; 466 struct hostent *hp; 467 static char domain[MAXHOSTNAMELEN + 1]; 468 static int first = 1; 469 struct in_addr in; 470 int nml; 471 472 if ((flags & RTF_HOST) == 0) 473 return netname(sa, nm); 474 475 if (first) { 476 first = 0; 477 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 478 (cp = strchr(domain, '.'))) 479 (void)strlcpy(domain, cp + 1, sizeof(domain)); 480 else 481 domain[0] = 0; 482 } 483 484 if (sa->sa_len == 0) 485 strlcpy(line, "default", sizeof(line)); 486 else switch (sa->sa_family) { 487 488 case AF_INET: 489 in = ((struct sockaddr_in *)sa)->sin_addr; 490 nml = netmask_length(nm, AF_INET); 491 492 cp = 0; 493 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) { 494 if (nml == 0) 495 cp = "default"; 496 else { 497 static char notdefault[sizeof(NOTDEFSTRING)]; 498 499 snprintf(notdefault, sizeof(notdefault), 500 "0.0.0.0/%s", netmask_string(nm, nml)); 501 cp = notdefault; 502 } 503 } 504 if (cp == 0 && !nflag) { 505 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 506 AF_INET); 507 if (hp) { 508 if ((cp = strchr(hp->h_name, '.')) && 509 !strcmp(cp + 1, domain)) 510 *cp = 0; 511 cp = hp->h_name; 512 } 513 } 514 if (cp) 515 (void)strlcpy(line, cp, sizeof(line)); 516 else 517 (void)strlcpy(line, inet_ntoa(in), sizeof(line)); 518 break; 519 520 case AF_LINK: 521 return (link_ntoa((struct sockaddr_dl *)sa)); 522 523 #ifndef SMALL 524 #ifdef INET6 525 case AF_INET6: 526 { 527 struct sockaddr_in6 sin6; 528 int niflags; 529 530 niflags = 0; 531 if (nflag) 532 niflags |= NI_NUMERICHOST; 533 memset(&sin6, 0, sizeof(sin6)); 534 memcpy(&sin6, sa, sa->sa_len); 535 sin6.sin6_len = sizeof(struct sockaddr_in6); 536 sin6.sin6_family = AF_INET6; 537 #ifdef __KAME__ 538 if (sa->sa_len == sizeof(struct sockaddr_in6) && 539 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 540 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 541 sin6.sin6_scope_id == 0) { 542 sin6.sin6_scope_id = 543 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 544 sin6.sin6_addr.s6_addr[2] = 0; 545 sin6.sin6_addr.s6_addr[3] = 0; 546 } 547 #endif 548 nml = netmask_length(nm, AF_INET6); 549 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 550 if (nml == 0) 551 strlcpy(line, "::", sizeof(line)); 552 else 553 /* noncontiguous never happens in ipv6 */ 554 snprintf(line, sizeof(line), "::/%d", nml); 555 } 556 557 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 558 line, sizeof(line), NULL, 0, niflags) != 0) 559 strlcpy(line, "invalid", sizeof(line)); 560 break; 561 } 562 #endif 563 564 case AF_NS: 565 return (ns_print((struct sockaddr_ns *)sa)); 566 567 case AF_ISO: 568 (void)snprintf(line, sizeof line, "iso %s", 569 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 570 break; 571 572 case AF_APPLETALK: 573 (void) snprintf(line, sizeof(line), "atalk %d.%d", 574 ((struct sockaddr_at *)sa)->sat_addr.s_net, 575 ((struct sockaddr_at *)sa)->sat_addr.s_node); 576 break; 577 #endif /* SMALL */ 578 579 default: 580 (void)snprintf(line, sizeof line, "(%d) %s", 581 sa->sa_family, any_ntoa(sa)); 582 break; 583 584 } 585 return (line); 586 } 587 588 /* 589 * Return the name of the network whose address is given. 590 * The address is assumed to be that of a net or subnet, not a host. 591 */ 592 char * 593 netname(struct sockaddr *sa, struct sockaddr *nm) 594 { 595 char *cp = 0; 596 static char line[50]; 597 struct netent *np = 0; 598 u_int32_t net, mask; 599 u_int32_t i; 600 int subnetshift, nml; 601 struct in_addr in; 602 603 switch (sa->sa_family) { 604 605 case AF_INET: 606 in = ((struct sockaddr_in *)sa)->sin_addr; 607 i = ntohl(in.s_addr); 608 nml = netmask_length(nm, AF_INET); 609 if (i == 0) { 610 if (nml == 0) 611 cp = "default"; 612 else { 613 static char notdefault[sizeof(NOTDEFSTRING)]; 614 615 snprintf(notdefault, sizeof(notdefault), 616 "0.0.0.0/%s", netmask_string(nm, nml)); 617 cp = notdefault; 618 } 619 } 620 else if (!nflag) { 621 if (IN_CLASSA(i)) { 622 mask = IN_CLASSA_NET; 623 subnetshift = 8; 624 } else if (IN_CLASSB(i)) { 625 mask = IN_CLASSB_NET; 626 subnetshift = 8; 627 } else { 628 mask = IN_CLASSC_NET; 629 subnetshift = 4; 630 } 631 /* 632 * If there are more bits than the standard mask 633 * would suggest, subnets must be in use. 634 * Guess at the subnet mask, assuming reasonable 635 * width subnet fields. 636 */ 637 while (i &~ mask) 638 mask = (int32_t)mask >> subnetshift; 639 net = i & mask; 640 while ((mask & 1) == 0) 641 mask >>= 1, net >>= 1; 642 np = getnetbyaddr(net, AF_INET); 643 if (np) 644 cp = np->n_name; 645 } 646 if (cp) 647 (void)strlcpy(line, cp, sizeof(line)); 648 else { 649 #if 0 /* XXX - This is silly... */ 650 #define C(x) ((x) & 0xff) 651 if ((i & 0xffffff) == 0) 652 (void)snprintf(line, sizeof line, "%u", 653 C(i >> 24)); 654 else if ((i & 0xffff) == 0) 655 (void)snprintf(line, sizeof line, "%u.%u", 656 C(i >> 24), C(i >> 16)); 657 else if ((i & 0xff) == 0) 658 (void)snprintf(line, sizeof line, "%u.%u.%u", 659 C(i >> 24), C(i >> 16), C(i >> 8)); 660 else 661 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", 662 C(i >> 24), C(i >> 16), C(i >> 8), C(i)); 663 #undef C 664 #else /* XXX */ 665 if (nml == 0) 666 strlcpy(line, inet_ntoa(in), sizeof(line)); 667 else 668 snprintf(line, sizeof(line), "%s/%d", inet_ntoa(in), nml); 669 #endif /* XXX */ 670 } 671 break; 672 673 case AF_LINK: 674 return (link_ntoa((struct sockaddr_dl *)sa)); 675 676 #ifndef SMALL 677 #ifdef INET6 678 case AF_INET6: 679 { 680 struct sockaddr_in6 sin6; 681 int niflags; 682 683 niflags = 0; 684 if (nflag) 685 niflags |= NI_NUMERICHOST; 686 memset(&sin6, 0, sizeof(sin6)); 687 memcpy(&sin6, sa, sa->sa_len); 688 sin6.sin6_len = sizeof(struct sockaddr_in6); 689 sin6.sin6_family = AF_INET6; 690 #ifdef __KAME__ 691 if (sa->sa_len == sizeof(struct sockaddr_in6) && 692 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 693 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 694 sin6.sin6_scope_id == 0) { 695 sin6.sin6_scope_id = 696 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 697 sin6.sin6_addr.s6_addr[2] = 0; 698 sin6.sin6_addr.s6_addr[3] = 0; 699 } 700 #endif 701 nml = netmask_length(nm, AF_INET6); 702 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 703 if (nml == 0) 704 strlcpy(line, "::", sizeof(line)); 705 else 706 /* noncontiguous never happens in ipv6 */ 707 snprintf(line, sizeof(line), "::/%d", nml); 708 } 709 710 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 711 line, sizeof(line), NULL, 0, niflags) != 0) 712 strlcpy(line, "invalid", sizeof(line)); 713 break; 714 } 715 #endif 716 717 case AF_NS: 718 return (ns_print((struct sockaddr_ns *)sa)); 719 720 case AF_ISO: 721 (void)snprintf(line, sizeof line, "iso %s", 722 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 723 break; 724 725 case AF_APPLETALK: 726 (void) snprintf(line, sizeof(line), "atalk %d.%d", 727 ((struct sockaddr_at *)sa)->sat_addr.s_net, 728 ((struct sockaddr_at *)sa)->sat_addr.s_node); 729 break; 730 #endif /* SMALL */ 731 732 default: 733 (void)snprintf(line, sizeof line, "af %d: %s", 734 sa->sa_family, any_ntoa(sa)); 735 break; 736 } 737 return (line); 738 } 739 740 static void 741 set_metric(char *value, int key) 742 { 743 int flag = 0; 744 u_long noval, *valp = &noval; 745 746 switch (key) { 747 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 748 caseof(K_MTU, RTV_MTU, rmx_mtu); 749 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 750 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 751 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 752 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 753 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 754 caseof(K_RTT, RTV_RTT, rmx_rtt); 755 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 756 } 757 rtm_inits |= flag; 758 if (lockrest || locking) 759 rt_metrics.rmx_locks |= flag; 760 if (locking) 761 locking = 0; 762 *valp = atoi(value); 763 } 764 765 static int 766 newroute(int argc, char **argv) 767 { 768 char *cmd, *dest = "", *gateway = ""; 769 const char *error; 770 int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC; 771 int key; 772 struct hostent *hp = 0; 773 774 cmd = argv[0]; 775 af = 0; 776 if (*cmd != 'g') 777 shutdown(sock, SHUT_RD); /* Don't want to read back our messages */ 778 while (--argc > 0) { 779 if (**(++argv)== '-') { 780 switch (key = keyword(1 + *argv)) { 781 782 case K_SA: 783 af = PF_ROUTE; 784 aflen = sizeof(union sockunion); 785 break; 786 787 #ifndef SMALL 788 case K_ATALK: 789 af = AF_APPLETALK; 790 aflen = sizeof(struct sockaddr_at); 791 break; 792 #endif 793 794 case K_INET: 795 af = AF_INET; 796 aflen = sizeof(struct sockaddr_in); 797 break; 798 799 #ifdef INET6 800 case K_INET6: 801 af = AF_INET6; 802 aflen = sizeof(struct sockaddr_in6); 803 break; 804 #endif 805 806 case K_LINK: 807 af = AF_LINK; 808 aflen = sizeof(struct sockaddr_dl); 809 break; 810 811 #ifndef SMALL 812 case K_OSI: 813 case K_ISO: 814 af = AF_ISO; 815 aflen = sizeof(struct sockaddr_iso); 816 break; 817 818 case K_X25: 819 af = AF_CCITT; 820 aflen = sizeof(struct sockaddr_x25); 821 break; 822 823 case K_XNS: 824 af = AF_NS; 825 aflen = sizeof(struct sockaddr_ns); 826 break; 827 #endif /* SMALL */ 828 829 case K_IFACE: 830 case K_INTERFACE: 831 iflag++; 832 break; 833 case K_NOSTATIC: 834 flags &= ~RTF_STATIC; 835 break; 836 case K_LLINFO: 837 flags |= RTF_LLINFO; 838 break; 839 case K_LOCK: 840 locking = 1; 841 break; 842 case K_LOCKREST: 843 lockrest = 1; 844 break; 845 case K_HOST: 846 forcehost++; 847 break; 848 case K_REJECT: 849 flags |= RTF_REJECT; 850 break; 851 case K_BLACKHOLE: 852 flags |= RTF_BLACKHOLE; 853 break; 854 case K_CLONED: 855 flags |= RTF_CLONED; 856 break; 857 case K_PROTO1: 858 flags |= RTF_PROTO1; 859 break; 860 case K_PROTO2: 861 flags |= RTF_PROTO2; 862 break; 863 case K_CLONING: 864 flags |= RTF_CLONING; 865 break; 866 case K_XRESOLVE: 867 flags |= RTF_XRESOLVE; 868 break; 869 case K_STATIC: 870 flags |= RTF_STATIC; 871 break; 872 case K_IFA: 873 if (!--argc) 874 usage(1+*argv); 875 (void) getaddr(RTA_IFA, *++argv, 0); 876 break; 877 case K_IFP: 878 if (!--argc) 879 usage(1+*argv); 880 (void) getaddr(RTA_IFP, *++argv, 0); 881 break; 882 case K_GENMASK: 883 if (!--argc) 884 usage(1+*argv); 885 (void) getaddr(RTA_GENMASK, *++argv, 0); 886 break; 887 case K_GATEWAY: 888 if (!--argc) 889 usage(1+*argv); 890 (void) getaddr(RTA_GATEWAY, *++argv, 0); 891 break; 892 case K_DST: 893 if (!--argc) 894 usage(1+*argv); 895 ishost = getaddr(RTA_DST, *++argv, &hp); 896 dest = *argv; 897 break; 898 case K_NETMASK: 899 if (!--argc) 900 usage(1+*argv); 901 (void) getaddr(RTA_NETMASK, *++argv, 0); 902 /* FALLTHROUGH */ 903 case K_NET: 904 forcenet++; 905 break; 906 case K_PREFIXLEN: 907 if (!--argc) 908 usage(1+*argv); 909 ishost = prefixlen(*++argv); 910 break; 911 case K_MTU: 912 case K_HOPCOUNT: 913 case K_EXPIRE: 914 case K_RECVPIPE: 915 case K_SENDPIPE: 916 case K_SSTHRESH: 917 case K_RTT: 918 case K_RTTVAR: 919 if (!--argc) 920 usage(1+*argv); 921 set_metric(*++argv, key); 922 break; 923 default: 924 usage(1+*argv); 925 } 926 } else { 927 if ((rtm_addrs & RTA_DST) == 0) { 928 dest = *argv; 929 ishost = getaddr(RTA_DST, *argv, &hp); 930 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 931 gateway = *argv; 932 (void) getaddr(RTA_GATEWAY, *argv, &hp); 933 } else { 934 ret = atoi(*argv); 935 936 if (ret == 0) { 937 if (strcmp(*argv, "0") == 0) { 938 if (!qflag) { 939 warnx("%s, %s", 940 "old usage of trailing 0", 941 "assuming route to if"); 942 } 943 } else 944 usage((char *)NULL); 945 iflag = 1; 946 continue; 947 } else if (ret > 0 && ret < 10) { 948 if (!qflag) { 949 warnx("%s, %s", 950 "old usage of trailing digit", 951 "assuming route via gateway"); 952 } 953 iflag = 0; 954 continue; 955 } 956 (void) getaddr(RTA_NETMASK, *argv, 0); 957 } 958 } 959 } 960 if (forcehost && forcenet) 961 errx(1, "-host and -net conflict"); 962 else if (forcehost) 963 ishost = 1; 964 else if (forcenet) 965 ishost = 0; 966 flags |= RTF_UP; 967 if (ishost) 968 flags |= RTF_HOST; 969 if (iflag == 0) 970 flags |= RTF_GATEWAY; 971 for (attempts = 1; ; attempts++) { 972 errno = 0; 973 if ((ret = rtmsg(*cmd, flags)) == 0) 974 break; 975 if (errno != ENETUNREACH && errno != ESRCH) 976 break; 977 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 978 hp->h_addr_list++; 979 memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0], 980 hp->h_length); 981 } else 982 break; 983 } 984 if (*cmd == 'g') 985 return rv; 986 oerrno = errno; 987 if (!qflag) { 988 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 989 if (*gateway) { 990 (void) printf(": gateway %s", gateway); 991 if (attempts > 1 && ret == 0 && af == AF_INET) 992 (void) printf(" (%s)", 993 inet_ntoa(so_gate.sin.sin_addr)); 994 } 995 if (ret == 0) 996 (void) printf("\n"); 997 } 998 if (ret != 0) { 999 switch (oerrno) { 1000 case ESRCH: 1001 error = "not in table"; 1002 break; 1003 case EBUSY: 1004 error = "entry in use"; 1005 break; 1006 case ENOBUFS: 1007 error = "routing table overflow"; 1008 break; 1009 default: 1010 error = strerror(oerrno); 1011 break; 1012 } 1013 (void) printf(": %s\n", error); 1014 return 1; 1015 } 1016 return 0; 1017 } 1018 1019 static void 1020 inet_makenetandmask(u_int32_t net, struct sockaddr_in *isin) 1021 { 1022 u_int32_t addr, mask = 0; 1023 char *cp; 1024 1025 rtm_addrs |= RTA_NETMASK; 1026 if (net == 0) 1027 mask = addr = 0; 1028 else if (net < 128) { 1029 addr = net << IN_CLASSA_NSHIFT; 1030 mask = IN_CLASSA_NET; 1031 } else if (net < 192) { 1032 addr = net << IN_CLASSA_NSHIFT; 1033 mask = IN_CLASSB_NET; 1034 } else if (net < 224) { 1035 addr = net << IN_CLASSA_NSHIFT; 1036 mask = IN_CLASSC_NET; 1037 } else if (net < 256) { 1038 addr = net << IN_CLASSA_NSHIFT; 1039 mask = IN_CLASSD_NET; 1040 } else if (net < 49152) { /* 192 * 256 */ 1041 addr = net << IN_CLASSB_NSHIFT; 1042 mask = IN_CLASSB_NET; 1043 } else if (net < 57344) { /* 224 * 256 */ 1044 addr = net << IN_CLASSB_NSHIFT; 1045 mask = IN_CLASSC_NET; 1046 } else if (net < 65536) { 1047 addr = net << IN_CLASSB_NSHIFT; 1048 mask = IN_CLASSB_NET; 1049 } else if (net < 14680064L) { /* 224 * 65536 */ 1050 addr = net << IN_CLASSC_NSHIFT; 1051 mask = IN_CLASSC_NET; 1052 } else if (net < 16777216L) { 1053 addr = net << IN_CLASSC_NSHIFT; 1054 mask = IN_CLASSD_NET; 1055 } else { 1056 addr = net; 1057 if ((addr & IN_CLASSA_HOST) == 0) 1058 mask = IN_CLASSA_NET; 1059 else if ((addr & IN_CLASSB_HOST) == 0) 1060 mask = IN_CLASSB_NET; 1061 else if ((addr & IN_CLASSC_HOST) == 0) 1062 mask = IN_CLASSC_NET; 1063 else 1064 mask = -1; 1065 } 1066 isin->sin_addr.s_addr = htonl(addr); 1067 isin = &so_mask.sin; 1068 isin->sin_addr.s_addr = htonl(mask); 1069 isin->sin_len = 0; 1070 isin->sin_family = 0; 1071 cp = (char *)(&isin->sin_addr + 1); 1072 while (*--cp == 0 && cp > (char *)isin) 1073 ; 1074 isin->sin_len = 1 + cp - (char *)isin; 1075 } 1076 1077 #ifdef INET6 1078 /* 1079 * XXX the function may need more improvement... 1080 */ 1081 static int 1082 inet6_makenetandmask(struct sockaddr_in6 *sin6) 1083 { 1084 char *plen; 1085 struct in6_addr in6; 1086 1087 plen = NULL; 1088 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1089 sin6->sin6_scope_id == 0) { 1090 plen = "0"; 1091 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1092 /* aggregatable global unicast - RFC2374 */ 1093 memset(&in6, 0, sizeof(in6)); 1094 if (!memcmp(&sin6->sin6_addr.s6_addr[8], &in6.s6_addr[8], 8)) 1095 plen = "64"; 1096 } 1097 1098 if (!plen || strcmp(plen, "128") == 0) 1099 return 1; 1100 else { 1101 rtm_addrs |= RTA_NETMASK; 1102 (void)prefixlen(plen); 1103 return 0; 1104 } 1105 } 1106 #endif 1107 1108 /* 1109 * Interpret an argument as a network address of some kind, 1110 * returning 1 if a host address, 0 if a network address. 1111 */ 1112 static int 1113 getaddr(int which, char *s, struct hostent **hpp) 1114 { 1115 sup su; 1116 struct hostent *hp; 1117 struct netent *np; 1118 u_int32_t val; 1119 char *t; 1120 int afamily; /* local copy of af so we can change it */ 1121 1122 if (af == 0) { 1123 af = AF_INET; 1124 aflen = sizeof(struct sockaddr_in); 1125 } 1126 afamily = af; 1127 rtm_addrs |= which; 1128 switch (which) { 1129 case RTA_DST: 1130 su = &so_dst; 1131 break; 1132 case RTA_GATEWAY: 1133 su = &so_gate; 1134 break; 1135 case RTA_NETMASK: 1136 su = &so_mask; 1137 break; 1138 case RTA_GENMASK: 1139 su = &so_genmask; 1140 break; 1141 case RTA_IFP: 1142 su = &so_ifp; 1143 afamily = AF_LINK; 1144 break; 1145 case RTA_IFA: 1146 su = &so_ifa; 1147 su->sa.sa_family = af; 1148 break; 1149 default: 1150 su = NULL; 1151 usage("Internal Error"); 1152 /*NOTREACHED*/ 1153 } 1154 su->sa.sa_len = aflen; 1155 su->sa.sa_family = afamily; /* cases that don't want it have left already */ 1156 if (strcmp(s, "default") == 0) { 1157 switch (which) { 1158 case RTA_DST: 1159 forcenet++; 1160 (void) getaddr(RTA_NETMASK, s, 0); 1161 break; 1162 case RTA_NETMASK: 1163 case RTA_GENMASK: 1164 su->sa.sa_len = 0; 1165 } 1166 return (0); 1167 } 1168 switch (afamily) { 1169 #ifndef SMALL 1170 #ifdef INET6 1171 case AF_INET6: 1172 { 1173 struct addrinfo hints, *res; 1174 char *slash = 0; 1175 1176 if (which == RTA_DST && (slash = (strrchr(s, '/'))) != 0) 1177 *slash = '\0'; 1178 memset(&hints, 0, sizeof(hints)); 1179 hints.ai_family = afamily; /*AF_INET6*/ 1180 hints.ai_flags = AI_NUMERICHOST; 1181 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1182 if (getaddrinfo(s, "0", &hints, &res) != 0) { 1183 hints.ai_flags = 0; 1184 if (slash) { 1185 *slash = '/'; 1186 slash = 0; 1187 } 1188 if (getaddrinfo(s, "0", &hints, &res) != 0) { 1189 (void) fprintf(stderr, "%s: bad value\n", s); 1190 exit(1); 1191 } 1192 } 1193 if (slash) 1194 *slash = '/'; 1195 if (sizeof(su->sin6) != res->ai_addrlen) { 1196 (void) fprintf(stderr, "%s: bad value\n", s); 1197 exit(1); 1198 } 1199 if (res->ai_next) { 1200 (void) fprintf(stderr, 1201 "%s: resolved to multiple values\n", s); 1202 exit(1); 1203 } 1204 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1205 freeaddrinfo(res); 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 if (hints.ai_flags == AI_NUMERICHOST) { 1216 if (slash) 1217 return (prefixlen(slash + 1)); 1218 if (which == RTA_DST) 1219 return (inet6_makenetandmask(&su->sin6)); 1220 return (0); 1221 } else 1222 return (1); 1223 } 1224 #endif 1225 1226 case AF_NS: 1227 if (which == RTA_DST) { 1228 struct sockaddr_ns *sms = &(so_mask.sns); 1229 memset(sms, 0, sizeof(*sms)); 1230 sms->sns_family = 0; 1231 sms->sns_len = 6; 1232 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 1233 rtm_addrs |= RTA_NETMASK; 1234 } 1235 su->sns.sns_addr = ns_addr(s); 1236 return (!ns_nullhost(su->sns.sns_addr)); 1237 1238 case AF_OSI: 1239 su->siso.siso_addr = *iso_addr(s); 1240 if (which == RTA_NETMASK || which == RTA_GENMASK) { 1241 char *cp = (char *)TSEL(&su->siso); 1242 su->siso.siso_nlen = 0; 1243 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 1244 su->siso.siso_len = 1 + cp - (char *)su; 1245 } 1246 return (1); 1247 1248 case AF_CCITT: 1249 ccitt_addr(s, &su->sx25); 1250 return (which == RTA_DST ? x25_makemask() : 1); 1251 #endif /* SMALL */ 1252 1253 case PF_ROUTE: 1254 su->sa.sa_len = sizeof(*su); 1255 sockaddr(s, &su->sa); 1256 return (1); 1257 1258 #ifndef SMALL 1259 case AF_APPLETALK: 1260 t = strchr (s, '.'); 1261 if (!t) { 1262 badataddr: 1263 errx(1, "bad address: %s", s); 1264 } 1265 val = atoi (s); 1266 if (val > 65535) 1267 goto badataddr; 1268 su->sat.sat_addr.s_net = val; 1269 val = atoi (t); 1270 if (val > 256) 1271 goto badataddr; 1272 su->sat.sat_addr.s_node = val; 1273 rtm_addrs |= RTA_NETMASK; 1274 return(forcehost || su->sat.sat_addr.s_node != 0); 1275 #endif 1276 1277 case AF_LINK: 1278 link_addr(s, &su->sdl); 1279 return (1); 1280 1281 case AF_INET: 1282 default: 1283 break; 1284 } 1285 1286 if (hpp == NULL) 1287 hpp = &hp; 1288 *hpp = NULL; 1289 1290 if ((t = strchr(s, '/')) != NULL && which == RTA_DST) { 1291 *t = '\0'; 1292 if ((val = inet_addr(s)) != INADDR_NONE) { 1293 inet_makenetandmask(htonl(val), &su->sin); 1294 return prefixlen(&t[1]); 1295 } 1296 *t = '/'; 1297 } 1298 if (((val = inet_addr(s)) != INADDR_NONE) && 1299 (which != RTA_DST || forcenet == 0)) { 1300 su->sin.sin_addr.s_addr = val; 1301 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1302 return (1); 1303 else { 1304 val = ntohl(val); 1305 goto netdone; 1306 } 1307 } 1308 if ((val = inet_network(s)) != INADDR_NONE || 1309 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) { 1310 netdone: 1311 if (which == RTA_DST) 1312 inet_makenetandmask(val, &su->sin); 1313 return (0); 1314 } 1315 hp = gethostbyname(s); 1316 if (hp) { 1317 *hpp = hp; 1318 su->sin.sin_family = hp->h_addrtype; 1319 memmove(&su->sin.sin_addr, hp->h_addr, hp->h_length); 1320 return (1); 1321 } 1322 errx(1, "bad value: %s", s); 1323 } 1324 1325 int 1326 prefixlen(s) 1327 char *s; 1328 { 1329 int len = atoi(s), q, r; 1330 int max; 1331 1332 switch (af) { 1333 case AF_INET: 1334 max = sizeof(struct in_addr) * 8; 1335 break; 1336 #ifdef INET6 1337 case AF_INET6: 1338 max = sizeof(struct in6_addr) * 8; 1339 break; 1340 #endif 1341 default: 1342 (void) fprintf(stderr, 1343 "prefixlen is not supported with af %d\n", af); 1344 exit(1); 1345 } 1346 1347 rtm_addrs |= RTA_NETMASK; 1348 if (len < -1 || len > max) { 1349 (void) fprintf(stderr, "%s: bad value\n", s); 1350 exit(1); 1351 } 1352 1353 q = len >> 3; 1354 r = len & 7; 1355 switch (af) { 1356 case AF_INET: 1357 memset(&so_mask, 0, sizeof(so_mask)); 1358 so_mask.sin.sin_family = AF_INET; 1359 so_mask.sin.sin_len = sizeof(struct sockaddr_in); 1360 so_mask.sin.sin_addr.s_addr = htonl(0xffffffff << (32 - len)); 1361 break; 1362 #ifdef INET6 1363 case AF_INET6: 1364 so_mask.sin6.sin6_family = AF_INET6; 1365 so_mask.sin6.sin6_len = sizeof(struct sockaddr_in6); 1366 memset((void *)&so_mask.sin6.sin6_addr, 0, 1367 sizeof(so_mask.sin6.sin6_addr)); 1368 if (q > 0) 1369 memset((void *)&so_mask.sin6.sin6_addr, 0xff, q); 1370 if (r > 0) 1371 *((u_char *)&so_mask.sin6.sin6_addr + q) = 1372 (0xff00 >> r) & 0xff; 1373 break; 1374 #endif 1375 } 1376 return (len == max); 1377 } 1378 1379 #ifndef SMALL 1380 int 1381 x25_makemask(void) 1382 { 1383 char *cp; 1384 1385 if ((rtm_addrs & RTA_NETMASK) == 0) { 1386 rtm_addrs |= RTA_NETMASK; 1387 for (cp = (char *)&so_mask.sx25.x25_net; 1388 cp < &so_mask.sx25.x25_opts.op_flags; cp++) 1389 *cp = -1; 1390 so_mask.sx25.x25_len = (u_char)&(((sup)0)->sx25.x25_opts); 1391 } 1392 return 0; 1393 } 1394 1395 1396 char * 1397 ns_print(struct sockaddr_ns *sns) 1398 { 1399 struct ns_addr work; 1400 union { union ns_net net_e; u_int32_t int32_t_e; } net; 1401 u_short port; 1402 static char mybuf[50], cport[10], chost[25]; 1403 char *host = ""; 1404 char *p; 1405 u_char *q; 1406 1407 work = sns->sns_addr; 1408 port = ntohs(work.x_port); 1409 work.x_port = 0; 1410 net.net_e = work.x_net; 1411 if (ns_nullhost(work) && net.int32_t_e == 0) { 1412 if (!port) 1413 return ("*.*"); 1414 (void)snprintf(mybuf, sizeof mybuf, "*.%XH", port); 1415 return (mybuf); 1416 } 1417 1418 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) 1419 host = "any"; 1420 else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) 1421 host = "*"; 1422 else { 1423 q = work.x_host.c_host; 1424 (void)snprintf(chost, sizeof chost, "%02X%02X%02X%02X%02X%02XH", 1425 q[0], q[1], q[2], q[3], q[4], q[5]); 1426 for (p = chost; *p == '0' && p < chost + 12; p++) 1427 /* void */; 1428 host = p; 1429 } 1430 if (port) 1431 (void)snprintf(cport, sizeof cport, ".%XH", htons(port)); 1432 else 1433 *cport = 0; 1434 1435 (void)snprintf(mybuf, sizeof mybuf, "%XH.%s%s", 1436 (u_int32_t)ntohl(net.int32_t_e), host, cport); 1437 return (mybuf); 1438 } 1439 1440 static void 1441 interfaces(void) 1442 { 1443 size_t needed; 1444 int mib[6]; 1445 char *buf, *lim, *next; 1446 struct rt_msghdr *rtm; 1447 1448 mib[0] = CTL_NET; 1449 mib[1] = PF_ROUTE; 1450 mib[2] = 0; /* protocol */ 1451 mib[3] = 0; /* wildcard address family */ 1452 mib[4] = NET_RT_IFLIST; 1453 mib[5] = 0; /* no flags */ 1454 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1455 err(1, "route-sysctl-estimate"); 1456 if ((buf = malloc(needed)) == NULL) 1457 err(1, "malloc"); 1458 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 1459 err(1, "actual retrieval of interface table"); 1460 lim = buf + needed; 1461 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1462 rtm = (struct rt_msghdr *)next; 1463 print_rtmsg(rtm, rtm->rtm_msglen); 1464 } 1465 } 1466 1467 static void 1468 monitor(void) 1469 { 1470 int n; 1471 char msg[2048]; 1472 1473 verbose = 1; 1474 if (debugonly) { 1475 interfaces(); 1476 exit(0); 1477 } 1478 for(;;) { 1479 time_t now; 1480 n = read(sock, msg, 2048); 1481 now = time(NULL); 1482 (void) printf("got message of size %d on %s", n, ctime(&now)); 1483 print_rtmsg((struct rt_msghdr *)msg, n); 1484 } 1485 } 1486 1487 #endif /* SMALL */ 1488 1489 1490 struct { 1491 struct rt_msghdr m_rtm; 1492 char m_space[512]; 1493 } m_rtmsg; 1494 1495 static int 1496 rtmsg(int cmd, int flags) 1497 { 1498 static int seq; 1499 int rlen; 1500 char *cp = m_rtmsg.m_space; 1501 int l; 1502 1503 #define NEXTADDR(w, u) \ 1504 if (rtm_addrs & (w)) {\ 1505 l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\ 1506 if (verbose && ! shortoutput) sodump(&(u),"u");\ 1507 } 1508 1509 errno = 0; 1510 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1511 if (cmd == 'a') 1512 cmd = RTM_ADD; 1513 else if (cmd == 'c') 1514 cmd = RTM_CHANGE; 1515 else if (cmd == 'g') { 1516 #ifdef SMALL 1517 return (-1); 1518 #else /* SMALL */ 1519 cmd = RTM_GET; 1520 if (so_ifp.sa.sa_family == 0) { 1521 so_ifp.sa.sa_family = AF_LINK; 1522 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1523 rtm_addrs |= RTA_IFP; 1524 } 1525 #endif /* SMALL */ 1526 } else 1527 cmd = RTM_DELETE; 1528 #define rtm m_rtmsg.m_rtm 1529 rtm.rtm_type = cmd; 1530 rtm.rtm_flags = flags; 1531 rtm.rtm_version = RTM_VERSION; 1532 rtm.rtm_seq = ++seq; 1533 rtm.rtm_addrs = rtm_addrs; 1534 rtm.rtm_rmx = rt_metrics; 1535 rtm.rtm_inits = rtm_inits; 1536 1537 if (rtm_addrs & RTA_NETMASK) 1538 mask_addr(); 1539 NEXTADDR(RTA_DST, so_dst); 1540 NEXTADDR(RTA_GATEWAY, so_gate); 1541 NEXTADDR(RTA_NETMASK, so_mask); 1542 NEXTADDR(RTA_GENMASK, so_genmask); 1543 NEXTADDR(RTA_IFP, so_ifp); 1544 NEXTADDR(RTA_IFA, so_ifa); 1545 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1546 if (verbose && ! shortoutput) 1547 print_rtmsg(&rtm, l); 1548 if (debugonly) 1549 return (0); 1550 if ((rlen = write(sock, (char *)&m_rtmsg, l)) < 0) { 1551 perror("writing to routing socket"); 1552 return (-1); 1553 } 1554 #ifndef SMALL 1555 if (cmd == RTM_GET) { 1556 do { 1557 l = read(sock, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1558 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1559 if (l < 0) 1560 err(1, "read from routing socket"); 1561 else 1562 print_getmsg(&rtm, l); 1563 } 1564 #endif /* SMALL */ 1565 #undef rtm 1566 return (0); 1567 } 1568 1569 static void 1570 mask_addr(void) 1571 { 1572 int olen = so_mask.sa.sa_len; 1573 char *cp1 = olen + (char *)&so_mask, *cp2; 1574 1575 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1576 if (*--cp1 != 0) { 1577 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1578 break; 1579 } 1580 if ((rtm_addrs & RTA_DST) == 0) 1581 return; 1582 switch (so_dst.sa.sa_family) { 1583 case AF_INET: 1584 #ifdef INET6 1585 case AF_INET6: 1586 #endif 1587 #ifndef SMALL 1588 case AF_APPLETALK: 1589 case AF_NS: 1590 case AF_CCITT: 1591 #endif /* SMALL */ 1592 case 0: 1593 return; 1594 #ifndef SMALL 1595 case AF_ISO: 1596 olen = MIN(so_dst.siso.siso_nlen, 1597 MAX(so_mask.sa.sa_len - 6, 0)); 1598 break; 1599 #endif /* SMALL */ 1600 } 1601 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1602 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1603 while (cp2 > cp1) 1604 *--cp2 = 0; 1605 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1606 while (cp1 > so_dst.sa.sa_data) 1607 *--cp1 &= *--cp2; 1608 #ifndef SMALL 1609 switch (so_dst.sa.sa_family) { 1610 case AF_ISO: 1611 so_dst.siso.siso_nlen = olen; 1612 break; 1613 } 1614 #endif /* SMALL */ 1615 } 1616 1617 char *msgtypes[] = { 1618 "", 1619 "RTM_ADD: Add Route", 1620 "RTM_DELETE: Delete Route", 1621 "RTM_CHANGE: Change Metrics or flags", 1622 "RTM_GET: Report Metrics", 1623 "RTM_LOSING: Kernel Suspects Partitioning", 1624 "RTM_REDIRECT: Told to use different route", 1625 "RTM_MISS: Lookup failed on this address", 1626 "RTM_LOCK: fix specified metrics", 1627 "RTM_OLDADD: caused by SIOCADDRT", 1628 "RTM_OLDDEL: caused by SIOCDELRT", 1629 "RTM_RESOLVE: Route created by cloning", 1630 "RTM_NEWADDR: address being added to iface", 1631 "RTM_DELADDR: address being removed from iface", 1632 "RTM_OIFINFO: iface status change (pre-1.5)", 1633 "RTM_IFINFO: iface status change", 1634 "RTM_IFANNOUNCE: iface arrival/departure", 1635 0, 1636 }; 1637 1638 char metricnames[] = 1639 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 1640 char routeflags[] = 1641 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016CLONED\017PROTO2\020PROTO1"; 1642 char ifnetflags[] = 1643 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST"; 1644 char addrnames[] = 1645 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1646 1647 1648 #ifndef SMALL 1649 static const char * 1650 linkstate(struct if_msghdr *ifm) 1651 { 1652 static char buf[64]; 1653 1654 switch (ifm->ifm_data.ifi_link_state) { 1655 case LINK_STATE_UNKNOWN: 1656 return "carrier: unknown"; 1657 case LINK_STATE_DOWN: 1658 return "carrier: no carrier"; 1659 case LINK_STATE_UP: 1660 return "carrier: active"; 1661 default: 1662 (void)snprintf(buf, sizeof(buf), "carrier: 0x%x", 1663 ifm->ifm_data.ifi_link_state); 1664 return buf; 1665 } 1666 } 1667 #endif /* SMALL */ 1668 1669 static void 1670 print_rtmsg(struct rt_msghdr *rtm, int msglen) 1671 { 1672 struct if_msghdr *ifm; 1673 struct ifa_msghdr *ifam; 1674 struct if_announcemsghdr *ifan; 1675 1676 if (verbose == 0) 1677 return; 1678 if (rtm->rtm_version != RTM_VERSION) { 1679 (void) printf("routing message version %d not understood\n", 1680 rtm->rtm_version); 1681 return; 1682 } 1683 if (msgtypes[rtm->rtm_type]) 1684 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1685 else 1686 (void)printf("#%d: ", rtm->rtm_type); 1687 (void)printf("len %d, ", rtm->rtm_msglen); 1688 switch (rtm->rtm_type) { 1689 case RTM_IFINFO: 1690 ifm = (struct if_msghdr *)rtm; 1691 (void) printf("if# %d, %s, flags:", ifm->ifm_index, 1692 #ifdef SMALL 1693 "" 1694 #else 1695 linkstate(ifm) 1696 #endif /* SMALL */ 1697 ); 1698 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1699 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1700 break; 1701 case RTM_NEWADDR: 1702 case RTM_DELADDR: 1703 ifam = (struct ifa_msghdr *)rtm; 1704 (void) printf("metric %d, flags:", ifam->ifam_metric); 1705 bprintf(stdout, ifam->ifam_flags, routeflags); 1706 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1707 break; 1708 case RTM_IFANNOUNCE: 1709 ifan = (struct if_announcemsghdr *)rtm; 1710 (void) printf("if# %d, what: ", ifan->ifan_index); 1711 switch (ifan->ifan_what) { 1712 case IFAN_ARRIVAL: 1713 printf("arrival"); 1714 break; 1715 case IFAN_DEPARTURE: 1716 printf("departure"); 1717 break; 1718 default: 1719 printf("#%d", ifan->ifan_what); 1720 break; 1721 } 1722 printf("\n"); 1723 break; 1724 default: 1725 (void) printf("pid: %d, seq %d, errno %d, flags:", 1726 rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1727 bprintf(stdout, rtm->rtm_flags, routeflags); 1728 pmsg_common(rtm); 1729 } 1730 } 1731 1732 #ifndef SMALL 1733 static void 1734 print_getmsg(struct rt_msghdr *rtm, int msglen) 1735 { 1736 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL, *ifa = NULL; 1737 struct sockaddr_dl *ifp = NULL; 1738 struct sockaddr *sa; 1739 char *cp; 1740 int i; 1741 1742 if (! shortoutput) 1743 (void) printf(" route to: %s\n", 1744 routename((struct sockaddr *) &so_dst, NULL, RTF_HOST)); 1745 if (rtm->rtm_version != RTM_VERSION) { 1746 warnx("routing message version %d not understood", 1747 rtm->rtm_version); 1748 return; 1749 } 1750 if (rtm->rtm_msglen > msglen) { 1751 warnx("message length mismatch, in packet %d, returned %d", 1752 rtm->rtm_msglen, msglen); 1753 } 1754 if (rtm->rtm_errno) { 1755 warn("RTM_GET"); 1756 return; 1757 } 1758 cp = ((char *)(rtm + 1)); 1759 if (rtm->rtm_addrs) 1760 for (i = 1; i; i <<= 1) 1761 if (i & rtm->rtm_addrs) { 1762 sa = (struct sockaddr *)cp; 1763 switch (i) { 1764 case RTA_DST: 1765 dst = sa; 1766 break; 1767 case RTA_GATEWAY: 1768 gate = sa; 1769 break; 1770 case RTA_NETMASK: 1771 mask = sa; 1772 break; 1773 case RTA_IFP: 1774 if (sa->sa_family == AF_LINK && 1775 ((struct sockaddr_dl *)sa)->sdl_nlen) 1776 ifp = (struct sockaddr_dl *)sa; 1777 break; 1778 case RTA_IFA: 1779 ifa = sa; 1780 break; 1781 } 1782 ADVANCE(cp, sa); 1783 } 1784 if (dst && mask) 1785 mask->sa_family = dst->sa_family; /* XXX */ 1786 if (dst && ! shortoutput) 1787 (void)printf("destination: %s\n", 1788 routename(dst, mask, RTF_HOST)); 1789 if (mask && ! shortoutput) { 1790 int savenflag = nflag; 1791 1792 nflag = 1; 1793 (void)printf(" mask: %s\n", 1794 routename(mask, NULL, RTF_HOST)); 1795 nflag = savenflag; 1796 } 1797 if (gate && rtm->rtm_flags & RTF_GATEWAY && ! shortoutput) 1798 (void)printf(" gateway: %s\n", 1799 routename(gate, NULL, RTF_HOST)); 1800 if (ifa && ! shortoutput) 1801 (void)printf(" local addr: %s\n", 1802 routename(ifa, NULL, RTF_HOST)); 1803 if (ifp && ! shortoutput) 1804 (void)printf(" interface: %.*s\n", 1805 ifp->sdl_nlen, ifp->sdl_data); 1806 if (! shortoutput) { 1807 (void)printf(" flags: "); 1808 bprintf(stdout, rtm->rtm_flags, routeflags); 1809 } 1810 1811 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1812 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1813 1814 if (! shortoutput) { 1815 (void) printf("\n%s\n", "\ 1816 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1817 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1818 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1819 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1820 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1821 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1822 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1823 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1824 if (rtm->rtm_rmx.rmx_expire) 1825 rtm->rtm_rmx.rmx_expire -= time(0); 1826 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1827 } 1828 #undef lock 1829 #undef msec 1830 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1831 1832 if ((rtm->rtm_addrs & RTF_GATEWAY) == 0) 1833 rv = 1; 1834 else { 1835 char *name; 1836 int addrs; 1837 1838 cp = (char *)(rtm + 1); 1839 addrs = rtm->rtm_addrs; 1840 1841 for (i = 1; i; i <<= 1) { 1842 sa = (struct sockaddr *)cp; 1843 if (i == RTF_GATEWAY) { 1844 name = routename(sa, NULL, RTF_HOST); 1845 if (name[0] == '\0') 1846 rv = 1; 1847 else if (shortoutput) 1848 printf("%s\n", name); 1849 } 1850 if (i & addrs) 1851 ADVANCE(cp, sa); 1852 } 1853 } 1854 1855 if (shortoutput) 1856 return; 1857 else if (verbose) 1858 pmsg_common(rtm); 1859 else if (rtm->rtm_addrs &~ RTA_IGN) { 1860 (void) printf("sockaddrs: "); 1861 bprintf(stdout, rtm->rtm_addrs, addrnames); 1862 putchar('\n'); 1863 } 1864 #undef RTA_IGN 1865 } 1866 #endif /* SMALL */ 1867 1868 void 1869 pmsg_common(struct rt_msghdr *rtm) 1870 { 1871 (void) printf("\nlocks: "); 1872 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1873 (void) printf(" inits: "); 1874 bprintf(stdout, rtm->rtm_inits, metricnames); 1875 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1876 } 1877 1878 static void 1879 pmsg_addrs(char *cp, int addrs) 1880 { 1881 struct sockaddr *sa; 1882 int i; 1883 1884 if (addrs != 0) { 1885 (void) printf("\nsockaddrs: "); 1886 bprintf(stdout, addrs, addrnames); 1887 (void) putchar('\n'); 1888 for (i = 1; i; i <<= 1) 1889 if (i & addrs) { 1890 sa = (struct sockaddr *)cp; 1891 (void) printf(" %s", 1892 routename(sa, NULL, RTF_HOST)); 1893 ADVANCE(cp, sa); 1894 } 1895 } 1896 (void) putchar('\n'); 1897 (void) fflush(stdout); 1898 } 1899 1900 static void 1901 bprintf(FILE *fp, int b, u_char *s) 1902 { 1903 int i; 1904 int gotsome = 0; 1905 1906 if (b == 0) 1907 return; 1908 while ((i = *s++) != 0) { 1909 if (b & (1 << (i-1))) { 1910 if (gotsome == 0) 1911 i = '<'; 1912 else 1913 i = ','; 1914 (void) putc(i, fp); 1915 gotsome = 1; 1916 for (; (i = *s) > 32; s++) 1917 (void) putc(i, fp); 1918 } else 1919 while (*s > 32) 1920 s++; 1921 } 1922 if (gotsome) 1923 (void) putc('>', fp); 1924 } 1925 1926 static int 1927 keyword(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(sup su, char *which) 1938 { 1939 #ifdef INET6 1940 char ntop_buf[NI_MAXHOST]; 1941 #endif 1942 1943 switch (su->sa.sa_family) { 1944 case AF_INET: 1945 (void) printf("%s: inet %s; ", 1946 which, inet_ntoa(su->sin.sin_addr)); 1947 break; 1948 #ifndef SMALL 1949 case AF_APPLETALK: 1950 (void) printf("%s: atalk %d.%d; ", 1951 which, su->sat.sat_addr.s_net, su->sat.sat_addr.s_node); 1952 break; 1953 #endif 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(char *addr, struct sockaddr *sa) 1993 { 1994 char *cp = (char *)sa; 1995 int size = sa->sa_len; 1996 char *cplim = cp + size; 1997 int byte = 0, state = VIRGIN, new = 0; 1998 1999 (void) memset(cp, 0, size); 2000 cp++; 2001 do { 2002 if ((*addr >= '0') && (*addr <= '9')) { 2003 new = *addr - '0'; 2004 } else if ((*addr >= 'a') && (*addr <= 'f')) { 2005 new = *addr - 'a' + 10; 2006 } else if ((*addr >= 'A') && (*addr <= 'F')) { 2007 new = *addr - 'A' + 10; 2008 } else if (*addr == 0) 2009 state |= END; 2010 else 2011 state |= DELIM; 2012 addr++; 2013 switch (state /* | INPUT */) { 2014 case GOTTWO | DIGIT: 2015 *cp++ = byte; /*FALLTHROUGH*/ 2016 case VIRGIN | DIGIT: 2017 state = GOTONE; byte = new; continue; 2018 case GOTONE | DIGIT: 2019 state = GOTTWO; byte = new + (byte << 4); continue; 2020 default: /* | DELIM */ 2021 state = VIRGIN; *cp++ = byte; byte = 0; continue; 2022 case GOTONE | END: 2023 case GOTTWO | END: 2024 *cp++ = byte; /* FALLTHROUGH */ 2025 case VIRGIN | END: 2026 break; 2027 } 2028 break; 2029 } while (cp < cplim); 2030 sa->sa_len = cp - (char *)sa; 2031 } 2032
Indexes created Wed Sep 24 22:09:59 GMT 2025