route.c revision 1.78
1 /* $NetBSD: route.c,v 1.78 2005/05/13 01:59:47 ginsbach 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 1.78 2005/05/13 01:59:47 ginsbach 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 #if __GNUC__ > 2 360 len = sa->sa_len - offsetof(struct sockaddr, sa_data); 361 #else 362 len = sa->sa_len; 363 #endif 364 in = sa->sa_data; 365 out = obuf; 366 367 do { 368 *out++ = hexlist[(*in >> 4) & 15]; 369 *out++ = hexlist[(*in++) & 15]; 370 *out++ = '.'; 371 } while (--len > 0); 372 out[-1] = '\0'; 373 return obuf; 374 } 375 376 377 int 378 netmask_length(struct sockaddr *nm, int family) 379 { 380 static int 381 /* number of bits in a nibble */ 382 _t[] = { 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4 }, 383 /* good nibbles are 1111, 1110, 1100, 1000, 0000 */ 384 _g[] = { 1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,1 }; 385 int mask, good, zeroes, maskbytes, bit, i; 386 unsigned char *maskdata; 387 388 if (nm == NULL) 389 return 0; 390 391 mask = 0; 392 good = 1; 393 zeroes = 0; 394 395 switch (family) { 396 case AF_INET: { 397 struct sockaddr_in *nsin = (struct sockaddr_in *)nm; 398 maskdata = (unsigned char *) &nsin->sin_addr; 399 maskbytes = nsin->sin_len - 400 ((caddr_t)&nsin->sin_addr - (caddr_t)nsin); 401 break; 402 } 403 case AF_INET6: { 404 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nm; 405 maskdata = (unsigned char *) &sin6->sin6_addr; 406 maskbytes = sin6->sin6_len - 407 ((caddr_t)&sin6->sin6_addr - (caddr_t)sin6); 408 break; 409 } 410 default: 411 return 0; 412 } 413 414 /* 415 * Count the bits in the nibbles of the mask, and marking the 416 * netmask as not good (or at best, non-standard and very 417 * discouraged, in the case of AF_INET) if we find either of 418 * a nibble with non-contiguous bits, or a non-zero nibble 419 * after we've found a zero nibble. 420 */ 421 for (i = 0; i < maskbytes; i++) { 422 /* high nibble */ 423 mask += bit = _t[maskdata[i] >> 4]; 424 good &= _g[maskdata[i] >> 4]; 425 if (zeroes && bit) 426 good = 0; 427 if (bit == 0) 428 zeroes = 1; 429 /* low nibble */ 430 mask += bit = _t[maskdata[i] & 0xf]; 431 good &= _g[maskdata[i] & 0xf]; 432 if (zeroes && bit) 433 good = 0; 434 if (bit == 0) 435 zeroes = 1; 436 } 437 438 /* 439 * Always return the number of bits found, but as a negative 440 * if the mask wasn't one we like. 441 */ 442 return good ? mask : -mask; 443 } 444 445 char * 446 netmask_string(struct sockaddr *mask, int len) 447 { 448 static char smask[16]; 449 450 if (len >= 0) 451 snprintf(smask, sizeof(smask), "%d", len); 452 else { 453 /* XXX AF_INET only?! */ 454 struct sockaddr_in nsin; 455 456 memset(&nsin, 0, sizeof(nsin)); 457 memcpy(&nsin, mask, mask->sa_len); 458 snprintf(smask, sizeof(smask), "%s", inet_ntoa(nsin.sin_addr)); 459 } 460 461 return smask; 462 } 463 464 465 char * 466 routename(struct sockaddr *sa, struct sockaddr *nm, int flags) 467 { 468 char *cp; 469 static char line[50]; 470 struct hostent *hp; 471 static char domain[MAXHOSTNAMELEN + 1]; 472 static int first = 1; 473 struct in_addr in; 474 int nml; 475 476 if ((flags & RTF_HOST) == 0) 477 return netname(sa, nm); 478 479 if (first) { 480 first = 0; 481 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 482 (cp = strchr(domain, '.'))) 483 (void)strlcpy(domain, cp + 1, sizeof(domain)); 484 else 485 domain[0] = 0; 486 } 487 488 if (sa->sa_len == 0) 489 strlcpy(line, "default", sizeof(line)); 490 else switch (sa->sa_family) { 491 492 case AF_INET: 493 in = ((struct sockaddr_in *)sa)->sin_addr; 494 nml = netmask_length(nm, AF_INET); 495 496 cp = 0; 497 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) { 498 if (nml == 0) 499 cp = "default"; 500 else { 501 static char notdefault[sizeof(NOTDEFSTRING)]; 502 503 snprintf(notdefault, sizeof(notdefault), 504 "0.0.0.0/%s", netmask_string(nm, nml)); 505 cp = notdefault; 506 } 507 } 508 if (cp == 0 && !nflag) { 509 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 510 AF_INET); 511 if (hp) { 512 if ((cp = strchr(hp->h_name, '.')) && 513 !strcmp(cp + 1, domain)) 514 *cp = 0; 515 cp = hp->h_name; 516 } 517 } 518 if (cp) 519 (void)strlcpy(line, cp, sizeof(line)); 520 else 521 (void)strlcpy(line, inet_ntoa(in), sizeof(line)); 522 break; 523 524 case AF_LINK: 525 return (link_ntoa((struct sockaddr_dl *)sa)); 526 527 #ifndef SMALL 528 #ifdef INET6 529 case AF_INET6: 530 { 531 struct sockaddr_in6 sin6; 532 int niflags; 533 534 niflags = 0; 535 if (nflag) 536 niflags |= NI_NUMERICHOST; 537 memset(&sin6, 0, sizeof(sin6)); 538 memcpy(&sin6, sa, sa->sa_len); 539 sin6.sin6_len = sizeof(struct sockaddr_in6); 540 sin6.sin6_family = AF_INET6; 541 #ifdef __KAME__ 542 if (sa->sa_len == sizeof(struct sockaddr_in6) && 543 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 544 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 545 sin6.sin6_scope_id == 0) { 546 sin6.sin6_scope_id = 547 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 548 sin6.sin6_addr.s6_addr[2] = 0; 549 sin6.sin6_addr.s6_addr[3] = 0; 550 } 551 #endif 552 nml = netmask_length(nm, AF_INET6); 553 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 554 if (nml == 0) 555 strlcpy(line, "::", sizeof(line)); 556 else 557 /* noncontiguous never happens in ipv6 */ 558 snprintf(line, sizeof(line), "::/%d", nml); 559 } 560 561 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 562 line, sizeof(line), NULL, 0, niflags) != 0) 563 strlcpy(line, "invalid", sizeof(line)); 564 break; 565 } 566 #endif 567 568 case AF_NS: 569 return (ns_print((struct sockaddr_ns *)sa)); 570 571 case AF_ISO: 572 (void)snprintf(line, sizeof line, "iso %s", 573 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 574 break; 575 576 case AF_APPLETALK: 577 (void) snprintf(line, sizeof(line), "atalk %d.%d", 578 ((struct sockaddr_at *)sa)->sat_addr.s_net, 579 ((struct sockaddr_at *)sa)->sat_addr.s_node); 580 break; 581 #endif /* SMALL */ 582 583 default: 584 (void)snprintf(line, sizeof line, "(%d) %s", 585 sa->sa_family, any_ntoa(sa)); 586 break; 587 588 } 589 return (line); 590 } 591 592 /* 593 * Return the name of the network whose address is given. 594 * The address is assumed to be that of a net or subnet, not a host. 595 */ 596 char * 597 netname(struct sockaddr *sa, struct sockaddr *nm) 598 { 599 char *cp = 0; 600 static char line[50]; 601 struct netent *np = 0; 602 u_int32_t net, mask; 603 u_int32_t i; 604 int subnetshift, nml; 605 struct in_addr in; 606 607 switch (sa->sa_family) { 608 609 case AF_INET: 610 in = ((struct sockaddr_in *)sa)->sin_addr; 611 i = ntohl(in.s_addr); 612 nml = netmask_length(nm, AF_INET); 613 if (i == 0) { 614 if (nml == 0) 615 cp = "default"; 616 else { 617 static char notdefault[sizeof(NOTDEFSTRING)]; 618 619 snprintf(notdefault, sizeof(notdefault), 620 "0.0.0.0/%s", netmask_string(nm, nml)); 621 cp = notdefault; 622 } 623 } 624 else if (!nflag) { 625 if (IN_CLASSA(i)) { 626 mask = IN_CLASSA_NET; 627 subnetshift = 8; 628 } else if (IN_CLASSB(i)) { 629 mask = IN_CLASSB_NET; 630 subnetshift = 8; 631 } else { 632 mask = IN_CLASSC_NET; 633 subnetshift = 4; 634 } 635 /* 636 * If there are more bits than the standard mask 637 * would suggest, subnets must be in use. 638 * Guess at the subnet mask, assuming reasonable 639 * width subnet fields. 640 */ 641 while (i &~ mask) 642 mask = (int32_t)mask >> subnetshift; 643 net = i & mask; 644 while ((mask & 1) == 0) 645 mask >>= 1, net >>= 1; 646 np = getnetbyaddr(net, AF_INET); 647 if (np) 648 cp = np->n_name; 649 } 650 if (cp) 651 (void)strlcpy(line, cp, sizeof(line)); 652 else { 653 #if 0 /* XXX - This is silly... */ 654 #define C(x) ((x) & 0xff) 655 if ((i & 0xffffff) == 0) 656 (void)snprintf(line, sizeof line, "%u", 657 C(i >> 24)); 658 else if ((i & 0xffff) == 0) 659 (void)snprintf(line, sizeof line, "%u.%u", 660 C(i >> 24), C(i >> 16)); 661 else if ((i & 0xff) == 0) 662 (void)snprintf(line, sizeof line, "%u.%u.%u", 663 C(i >> 24), C(i >> 16), C(i >> 8)); 664 else 665 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", 666 C(i >> 24), C(i >> 16), C(i >> 8), C(i)); 667 #undef C 668 #else /* XXX */ 669 if (nml == 0) 670 strlcpy(line, inet_ntoa(in), sizeof(line)); 671 else 672 snprintf(line, sizeof(line), "%s/%d", inet_ntoa(in), nml); 673 #endif /* XXX */ 674 } 675 break; 676 677 case AF_LINK: 678 return (link_ntoa((struct sockaddr_dl *)sa)); 679 680 #ifndef SMALL 681 #ifdef INET6 682 case AF_INET6: 683 { 684 struct sockaddr_in6 sin6; 685 int niflags; 686 687 niflags = 0; 688 if (nflag) 689 niflags |= NI_NUMERICHOST; 690 memset(&sin6, 0, sizeof(sin6)); 691 memcpy(&sin6, sa, sa->sa_len); 692 sin6.sin6_len = sizeof(struct sockaddr_in6); 693 sin6.sin6_family = AF_INET6; 694 #ifdef __KAME__ 695 if (sa->sa_len == sizeof(struct sockaddr_in6) && 696 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 697 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 698 sin6.sin6_scope_id == 0) { 699 sin6.sin6_scope_id = 700 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 701 sin6.sin6_addr.s6_addr[2] = 0; 702 sin6.sin6_addr.s6_addr[3] = 0; 703 } 704 #endif 705 nml = netmask_length(nm, AF_INET6); 706 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 707 if (nml == 0) 708 strlcpy(line, "::", sizeof(line)); 709 else 710 /* noncontiguous never happens in ipv6 */ 711 snprintf(line, sizeof(line), "::/%d", nml); 712 } 713 714 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 715 line, sizeof(line), NULL, 0, niflags) != 0) 716 strlcpy(line, "invalid", sizeof(line)); 717 break; 718 } 719 #endif 720 721 case AF_NS: 722 return (ns_print((struct sockaddr_ns *)sa)); 723 724 case AF_ISO: 725 (void)snprintf(line, sizeof line, "iso %s", 726 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 727 break; 728 729 case AF_APPLETALK: 730 (void) snprintf(line, sizeof(line), "atalk %d.%d", 731 ((struct sockaddr_at *)sa)->sat_addr.s_net, 732 ((struct sockaddr_at *)sa)->sat_addr.s_node); 733 break; 734 #endif /* SMALL */ 735 736 default: 737 (void)snprintf(line, sizeof line, "af %d: %s", 738 sa->sa_family, any_ntoa(sa)); 739 break; 740 } 741 return (line); 742 } 743 744 static void 745 set_metric(char *value, int key) 746 { 747 int flag = 0; 748 u_long noval, *valp = &noval; 749 750 switch (key) { 751 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 752 caseof(K_MTU, RTV_MTU, rmx_mtu); 753 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 754 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 755 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 756 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 757 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 758 caseof(K_RTT, RTV_RTT, rmx_rtt); 759 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 760 } 761 rtm_inits |= flag; 762 if (lockrest || locking) 763 rt_metrics.rmx_locks |= flag; 764 if (locking) 765 locking = 0; 766 *valp = atoi(value); 767 } 768 769 static int 770 newroute(int argc, char **argv) 771 { 772 char *cmd, *dest = "", *gateway = ""; 773 const char *error; 774 int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC; 775 int key; 776 struct hostent *hp = 0; 777 778 cmd = argv[0]; 779 af = 0; 780 if (*cmd != 'g') 781 shutdown(sock, SHUT_RD); /* Don't want to read back our messages */ 782 while (--argc > 0) { 783 if (**(++argv)== '-') { 784 switch (key = keyword(1 + *argv)) { 785 786 case K_SA: 787 af = PF_ROUTE; 788 aflen = sizeof(union sockunion); 789 break; 790 791 #ifndef SMALL 792 case K_ATALK: 793 af = AF_APPLETALK; 794 aflen = sizeof(struct sockaddr_at); 795 break; 796 #endif 797 798 case K_INET: 799 af = AF_INET; 800 aflen = sizeof(struct sockaddr_in); 801 break; 802 803 #ifdef INET6 804 case K_INET6: 805 af = AF_INET6; 806 aflen = sizeof(struct sockaddr_in6); 807 break; 808 #endif 809 810 case K_LINK: 811 af = AF_LINK; 812 aflen = sizeof(struct sockaddr_dl); 813 break; 814 815 #ifndef SMALL 816 case K_OSI: 817 case K_ISO: 818 af = AF_ISO; 819 aflen = sizeof(struct sockaddr_iso); 820 break; 821 822 case K_X25: 823 af = AF_CCITT; 824 aflen = sizeof(struct sockaddr_x25); 825 break; 826 827 case K_XNS: 828 af = AF_NS; 829 aflen = sizeof(struct sockaddr_ns); 830 break; 831 #endif /* SMALL */ 832 833 case K_IFACE: 834 case K_INTERFACE: 835 iflag++; 836 break; 837 case K_NOSTATIC: 838 flags &= ~RTF_STATIC; 839 break; 840 case K_LLINFO: 841 flags |= RTF_LLINFO; 842 break; 843 case K_LOCK: 844 locking = 1; 845 break; 846 case K_LOCKREST: 847 lockrest = 1; 848 break; 849 case K_HOST: 850 forcehost++; 851 break; 852 case K_REJECT: 853 flags |= RTF_REJECT; 854 break; 855 case K_BLACKHOLE: 856 flags |= RTF_BLACKHOLE; 857 break; 858 case K_CLONED: 859 flags |= RTF_CLONED; 860 break; 861 case K_PROTO1: 862 flags |= RTF_PROTO1; 863 break; 864 case K_PROTO2: 865 flags |= RTF_PROTO2; 866 break; 867 case K_CLONING: 868 flags |= RTF_CLONING; 869 break; 870 case K_XRESOLVE: 871 flags |= RTF_XRESOLVE; 872 break; 873 case K_STATIC: 874 flags |= RTF_STATIC; 875 break; 876 case K_IFA: 877 if (!--argc) 878 usage(1+*argv); 879 (void) getaddr(RTA_IFA, *++argv, 0); 880 break; 881 case K_IFP: 882 if (!--argc) 883 usage(1+*argv); 884 (void) getaddr(RTA_IFP, *++argv, 0); 885 break; 886 case K_GENMASK: 887 if (!--argc) 888 usage(1+*argv); 889 (void) getaddr(RTA_GENMASK, *++argv, 0); 890 break; 891 case K_GATEWAY: 892 if (!--argc) 893 usage(1+*argv); 894 (void) getaddr(RTA_GATEWAY, *++argv, 0); 895 break; 896 case K_DST: 897 if (!--argc) 898 usage(1+*argv); 899 ishost = getaddr(RTA_DST, *++argv, &hp); 900 dest = *argv; 901 break; 902 case K_NETMASK: 903 if (!--argc) 904 usage(1+*argv); 905 (void) getaddr(RTA_NETMASK, *++argv, 0); 906 /* FALLTHROUGH */ 907 case K_NET: 908 forcenet++; 909 break; 910 case K_PREFIXLEN: 911 if (!--argc) 912 usage(1+*argv); 913 ishost = prefixlen(*++argv); 914 break; 915 case K_MTU: 916 case K_HOPCOUNT: 917 case K_EXPIRE: 918 case K_RECVPIPE: 919 case K_SENDPIPE: 920 case K_SSTHRESH: 921 case K_RTT: 922 case K_RTTVAR: 923 if (!--argc) 924 usage(1+*argv); 925 set_metric(*++argv, key); 926 break; 927 default: 928 usage(1+*argv); 929 } 930 } else { 931 if ((rtm_addrs & RTA_DST) == 0) { 932 dest = *argv; 933 ishost = getaddr(RTA_DST, *argv, &hp); 934 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 935 gateway = *argv; 936 (void) getaddr(RTA_GATEWAY, *argv, &hp); 937 } else { 938 ret = atoi(*argv); 939 940 if (ret == 0) { 941 if (strcmp(*argv, "0") == 0) { 942 if (!qflag) { 943 warnx("%s, %s", 944 "old usage of trailing 0", 945 "assuming route to if"); 946 } 947 } else 948 usage((char *)NULL); 949 iflag = 1; 950 continue; 951 } else if (ret > 0 && ret < 10) { 952 if (!qflag) { 953 warnx("%s, %s", 954 "old usage of trailing digit", 955 "assuming route via gateway"); 956 } 957 iflag = 0; 958 continue; 959 } 960 (void) getaddr(RTA_NETMASK, *argv, 0); 961 } 962 } 963 } 964 if (forcehost && forcenet) 965 errx(1, "-host and -net conflict"); 966 else if (forcehost) 967 ishost = 1; 968 else if (forcenet) 969 ishost = 0; 970 flags |= RTF_UP; 971 if (ishost) 972 flags |= RTF_HOST; 973 if (iflag == 0) 974 flags |= RTF_GATEWAY; 975 for (attempts = 1; ; attempts++) { 976 errno = 0; 977 if ((ret = rtmsg(*cmd, flags)) == 0) 978 break; 979 if (errno != ENETUNREACH && errno != ESRCH) 980 break; 981 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 982 hp->h_addr_list++; 983 memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0], 984 hp->h_length); 985 } else 986 break; 987 } 988 if (*cmd == 'g') 989 return rv; 990 oerrno = errno; 991 if (!qflag) { 992 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 993 if (*gateway) { 994 (void) printf(": gateway %s", gateway); 995 if (attempts > 1 && ret == 0 && af == AF_INET) 996 (void) printf(" (%s)", 997 inet_ntoa(so_gate.sin.sin_addr)); 998 } 999 if (ret == 0) 1000 (void) printf("\n"); 1001 } 1002 if (ret != 0) { 1003 switch (oerrno) { 1004 case ESRCH: 1005 error = "not in table"; 1006 break; 1007 case EBUSY: 1008 error = "entry in use"; 1009 break; 1010 case ENOBUFS: 1011 error = "routing table overflow"; 1012 break; 1013 default: 1014 error = strerror(oerrno); 1015 break; 1016 } 1017 (void) printf(": %s\n", error); 1018 return 1; 1019 } 1020 return 0; 1021 } 1022 1023 static void 1024 inet_makenetandmask(u_int32_t net, struct sockaddr_in *isin) 1025 { 1026 u_int32_t addr, mask = 0; 1027 char *cp; 1028 1029 rtm_addrs |= RTA_NETMASK; 1030 if (net == 0) 1031 mask = addr = 0; 1032 else if (net < 128) { 1033 addr = net << IN_CLASSA_NSHIFT; 1034 mask = IN_CLASSA_NET; 1035 } else if (net < 192) { 1036 addr = net << IN_CLASSA_NSHIFT; 1037 mask = IN_CLASSB_NET; 1038 } else if (net < 224) { 1039 addr = net << IN_CLASSA_NSHIFT; 1040 mask = IN_CLASSC_NET; 1041 } else if (net < 256) { 1042 addr = net << IN_CLASSA_NSHIFT; 1043 mask = IN_CLASSD_NET; 1044 } else if (net < 49152) { /* 192 * 256 */ 1045 addr = net << IN_CLASSB_NSHIFT; 1046 mask = IN_CLASSB_NET; 1047 } else if (net < 57344) { /* 224 * 256 */ 1048 addr = net << IN_CLASSB_NSHIFT; 1049 mask = IN_CLASSC_NET; 1050 } else if (net < 65536) { 1051 addr = net << IN_CLASSB_NSHIFT; 1052 mask = IN_CLASSB_NET; 1053 } else if (net < 14680064L) { /* 224 * 65536 */ 1054 addr = net << IN_CLASSC_NSHIFT; 1055 mask = IN_CLASSC_NET; 1056 } else if (net < 16777216L) { 1057 addr = net << IN_CLASSC_NSHIFT; 1058 mask = IN_CLASSD_NET; 1059 } else { 1060 addr = net; 1061 if ((addr & IN_CLASSA_HOST) == 0) 1062 mask = IN_CLASSA_NET; 1063 else if ((addr & IN_CLASSB_HOST) == 0) 1064 mask = IN_CLASSB_NET; 1065 else if ((addr & IN_CLASSC_HOST) == 0) 1066 mask = IN_CLASSC_NET; 1067 else 1068 mask = -1; 1069 } 1070 isin->sin_addr.s_addr = htonl(addr); 1071 isin = &so_mask.sin; 1072 isin->sin_addr.s_addr = htonl(mask); 1073 isin->sin_len = 0; 1074 isin->sin_family = 0; 1075 cp = (char *)(&isin->sin_addr + 1); 1076 while (*--cp == 0 && cp > (char *)isin) 1077 ; 1078 isin->sin_len = 1 + cp - (char *)isin; 1079 } 1080 1081 #ifdef INET6 1082 /* 1083 * XXX the function may need more improvement... 1084 */ 1085 static int 1086 inet6_makenetandmask(struct sockaddr_in6 *sin6) 1087 { 1088 char *plen; 1089 struct in6_addr in6; 1090 1091 plen = NULL; 1092 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1093 sin6->sin6_scope_id == 0) { 1094 plen = "0"; 1095 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1096 /* aggregatable global unicast - RFC2374 */ 1097 memset(&in6, 0, sizeof(in6)); 1098 if (!memcmp(&sin6->sin6_addr.s6_addr[8], &in6.s6_addr[8], 8)) 1099 plen = "64"; 1100 } 1101 1102 if (!plen || strcmp(plen, "128") == 0) 1103 return 1; 1104 else { 1105 rtm_addrs |= RTA_NETMASK; 1106 (void)prefixlen(plen); 1107 return 0; 1108 } 1109 } 1110 #endif 1111 1112 /* 1113 * Interpret an argument as a network address of some kind, 1114 * returning 1 if a host address, 0 if a network address. 1115 */ 1116 static int 1117 getaddr(int which, char *s, struct hostent **hpp) 1118 { 1119 sup su; 1120 struct hostent *hp; 1121 struct netent *np; 1122 u_int32_t val; 1123 char *t; 1124 int afamily; /* local copy of af so we can change it */ 1125 1126 if (af == 0) { 1127 af = AF_INET; 1128 aflen = sizeof(struct sockaddr_in); 1129 } 1130 afamily = af; 1131 rtm_addrs |= which; 1132 switch (which) { 1133 case RTA_DST: 1134 su = &so_dst; 1135 break; 1136 case RTA_GATEWAY: 1137 su = &so_gate; 1138 break; 1139 case RTA_NETMASK: 1140 su = &so_mask; 1141 break; 1142 case RTA_GENMASK: 1143 su = &so_genmask; 1144 break; 1145 case RTA_IFP: 1146 su = &so_ifp; 1147 afamily = AF_LINK; 1148 break; 1149 case RTA_IFA: 1150 su = &so_ifa; 1151 su->sa.sa_family = af; 1152 break; 1153 default: 1154 su = NULL; 1155 usage("Internal Error"); 1156 /*NOTREACHED*/ 1157 } 1158 su->sa.sa_len = aflen; 1159 su->sa.sa_family = afamily; /* cases that don't want it have left already */ 1160 if (strcmp(s, "default") == 0) { 1161 switch (which) { 1162 case RTA_DST: 1163 forcenet++; 1164 (void) getaddr(RTA_NETMASK, s, 0); 1165 break; 1166 case RTA_NETMASK: 1167 case RTA_GENMASK: 1168 su->sa.sa_len = 0; 1169 } 1170 return (0); 1171 } 1172 switch (afamily) { 1173 #ifndef SMALL 1174 #ifdef INET6 1175 case AF_INET6: 1176 { 1177 struct addrinfo hints, *res; 1178 char *slash = 0; 1179 1180 if (which == RTA_DST && (slash = (strrchr(s, '/'))) != 0) 1181 *slash = '\0'; 1182 memset(&hints, 0, sizeof(hints)); 1183 hints.ai_family = afamily; /*AF_INET6*/ 1184 hints.ai_flags = AI_NUMERICHOST; 1185 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1186 if (getaddrinfo(s, "0", &hints, &res) != 0) { 1187 hints.ai_flags = 0; 1188 if (slash) { 1189 *slash = '/'; 1190 slash = 0; 1191 } 1192 if (getaddrinfo(s, "0", &hints, &res) != 0) 1193 errx(1, "bad value: %s", s); 1194 } 1195 if (slash) 1196 *slash = '/'; 1197 if (sizeof(su->sin6) != res->ai_addrlen) 1198 errx(1, "%s: bad value", s); 1199 if (res->ai_next) 1200 errx(1, "address resolved to multiple values: %s", s); 1201 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1202 freeaddrinfo(res); 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 (hints.ai_flags == AI_NUMERICHOST) { 1213 if (slash) 1214 return (prefixlen(slash + 1)); 1215 if (which == RTA_DST) 1216 return (inet6_makenetandmask(&su->sin6)); 1217 return (0); 1218 } else 1219 return (1); 1220 } 1221 #endif 1222 1223 case AF_NS: 1224 if (which == RTA_DST) { 1225 struct sockaddr_ns *sms = &(so_mask.sns); 1226 memset(sms, 0, sizeof(*sms)); 1227 sms->sns_family = 0; 1228 sms->sns_len = 6; 1229 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 1230 rtm_addrs |= RTA_NETMASK; 1231 } 1232 su->sns.sns_addr = ns_addr(s); 1233 return (!ns_nullhost(su->sns.sns_addr)); 1234 1235 case AF_OSI: 1236 su->siso.siso_addr = *iso_addr(s); 1237 if (which == RTA_NETMASK || which == RTA_GENMASK) { 1238 char *cp = (char *)TSEL(&su->siso); 1239 su->siso.siso_nlen = 0; 1240 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 1241 su->siso.siso_len = 1 + cp - (char *)su; 1242 } 1243 return (1); 1244 1245 case AF_CCITT: 1246 ccitt_addr(s, &su->sx25); 1247 return (which == RTA_DST ? x25_makemask() : 1); 1248 #endif /* SMALL */ 1249 1250 case PF_ROUTE: 1251 su->sa.sa_len = sizeof(*su); 1252 sockaddr(s, &su->sa); 1253 return (1); 1254 1255 #ifndef SMALL 1256 case AF_APPLETALK: 1257 t = strchr (s, '.'); 1258 if (!t) { 1259 badataddr: 1260 errx(1, "bad address: %s", s); 1261 } 1262 val = atoi (s); 1263 if (val > 65535) 1264 goto badataddr; 1265 su->sat.sat_addr.s_net = val; 1266 val = atoi (t); 1267 if (val > 256) 1268 goto badataddr; 1269 su->sat.sat_addr.s_node = val; 1270 rtm_addrs |= RTA_NETMASK; 1271 return(forcehost || su->sat.sat_addr.s_node != 0); 1272 #endif 1273 1274 case AF_LINK: 1275 link_addr(s, &su->sdl); 1276 return (1); 1277 1278 case AF_INET: 1279 default: 1280 break; 1281 } 1282 1283 if (hpp == NULL) 1284 hpp = &hp; 1285 *hpp = NULL; 1286 1287 if ((t = strchr(s, '/')) != NULL && which == RTA_DST) { 1288 *t = '\0'; 1289 if (forcenet == 0) { 1290 if ((val = inet_addr(s)) != INADDR_NONE) { 1291 inet_makenetandmask(htonl(val), &su->sin); 1292 return prefixlen(&t[1]); 1293 } 1294 } else { 1295 if ((val = inet_network(s)) != INADDR_NONE) { 1296 inet_makenetandmask(val, &su->sin); 1297 return prefixlen(&t[1]); 1298 } 1299 } 1300 *t = '/'; 1301 } 1302 if (((val = inet_addr(s)) != INADDR_NONE) && 1303 (which != RTA_DST || forcenet == 0)) { 1304 su->sin.sin_addr.s_addr = val; 1305 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1306 return (1); 1307 else { 1308 val = ntohl(val); 1309 goto netdone; 1310 } 1311 } 1312 if ((val = inet_network(s)) != INADDR_NONE || 1313 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) { 1314 netdone: 1315 if (which == RTA_DST) 1316 inet_makenetandmask(val, &su->sin); 1317 return (0); 1318 } 1319 hp = gethostbyname(s); 1320 if (hp) { 1321 *hpp = hp; 1322 su->sin.sin_family = hp->h_addrtype; 1323 memmove(&su->sin.sin_addr, hp->h_addr, hp->h_length); 1324 return (1); 1325 } 1326 errx(1, "bad value: %s", s); 1327 } 1328 1329 int 1330 prefixlen(s) 1331 char *s; 1332 { 1333 int len = atoi(s), q, r; 1334 int max; 1335 1336 switch (af) { 1337 case AF_INET: 1338 max = sizeof(struct in_addr) * 8; 1339 break; 1340 #ifdef INET6 1341 case AF_INET6: 1342 max = sizeof(struct in6_addr) * 8; 1343 break; 1344 #endif 1345 default: 1346 errx(1, "prefixlen is not supported with af %d", af); 1347 } 1348 1349 rtm_addrs |= RTA_NETMASK; 1350 if (len < -1 || len > max) 1351 errx(1, "bad value: %s", s); 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 Fri Sep 26 08:10:20 GMT 2025