route.c revision 1.102
1 /* $NetBSD: route.c,v 1.102 2006/09/23 21:51:05 dyoung 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 1.102 2006/09/23 21:51:05 dyoung 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 <net80211/ieee80211_netbsd.h> 57 #include <netinet/in.h> 58 #include <netatalk/at.h> 59 #include <netiso/iso.h> 60 #include <arpa/inet.h> 61 #include <netdb.h> 62 63 #include <errno.h> 64 #include <unistd.h> 65 #include <stdio.h> 66 #include <ctype.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <time.h> 70 #include <paths.h> 71 #include <err.h> 72 73 #include "keywords.h" 74 #include "extern.h" 75 76 typedef union sockunion *sup; 77 78 static char *any_ntoa(const struct sockaddr *); 79 static const char *route_strerror(int); 80 static void set_metric(char *, int); 81 static int newroute(int, char **); 82 static void inet_makenetandmask(u_int32_t, struct sockaddr_in *); 83 #ifdef INET6 84 static int inet6_makenetandmask(struct sockaddr_in6 *); 85 #endif 86 static int getaddr(int, char *, struct hostent **); 87 static int flushroutes(int, char *[], int); 88 static int prefixlen(const char *); 89 #ifndef SMALL 90 static void interfaces(void); 91 static void monitor(void); 92 static int print_getmsg(struct rt_msghdr *, int); 93 static const char *linkstate(struct if_msghdr *); 94 #endif /* SMALL */ 95 static int rtmsg(int, int ); 96 static void mask_addr(void); 97 static void print_rtmsg(struct rt_msghdr *, int); 98 static void pmsg_common(struct rt_msghdr *); 99 static void pmsg_addrs(char *, int); 100 static void bprintf(FILE *, int, const char *); 101 static void sodump(sup, const char *); 102 static void sockaddr(char *, struct sockaddr *); 103 104 union sockunion { 105 struct sockaddr sa; 106 struct sockaddr_in sin; 107 #ifdef INET6 108 struct sockaddr_in6 sin6; 109 #endif 110 struct sockaddr_at sat; 111 struct sockaddr_dl sdl; 112 #ifndef SMALL 113 struct sockaddr_iso siso; 114 #endif /* SMALL */ 115 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp; 116 117 int pid, rtm_addrs; 118 int sock; 119 int forcehost, forcenet, doflush, nflag, af, qflag, tflag, Sflag; 120 int iflag, verbose, aflen = sizeof(struct sockaddr_in); 121 int locking, lockrest, debugonly, shortoutput; 122 struct rt_metrics rt_metrics; 123 u_int32_t rtm_inits; 124 short ns_nullh[] = {0,0,0}; 125 short ns_bh[] = {-1,-1,-1}; 126 127 128 void 129 usage(const char *cp) 130 { 131 132 if (cp) 133 warnx("botched keyword: %s", cp); 134 (void)fprintf(stderr, 135 "Usage: %s [ -fnqSsv ] cmd [[ -<qualifers> ] args ]\n", 136 getprogname()); 137 exit(1); 138 /* NOTREACHED */ 139 } 140 141 #define PRIETHER "02x:%02x:%02x:%02x:%02x:%02x" 142 #define PRIETHER_ARGS(__enaddr) (__enaddr)[0], (__enaddr)[1], (__enaddr)[2], \ 143 (__enaddr)[3], (__enaddr)[4], (__enaddr)[5] 144 #define ROUNDUP(a) \ 145 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 146 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 147 148 int 149 main(int argc, char **argv) 150 { 151 int ch; 152 153 if (argc < 2) 154 usage(NULL); 155 156 while ((ch = getopt(argc, argv, "dfnqSstv")) != -1) 157 switch (ch) { 158 case 'd': 159 debugonly = 1; 160 break; 161 case 'f': 162 doflush = 1; 163 break; 164 case 'n': 165 nflag = 1; 166 break; 167 case 'q': 168 qflag = 1; 169 break; 170 case 'S': 171 Sflag = 1; 172 break; 173 case 's': 174 shortoutput = 1; 175 break; 176 case 't': 177 tflag = 1; 178 break; 179 case 'v': 180 verbose = 1; 181 break; 182 case '?': 183 default: 184 usage(NULL); 185 /*NOTREACHED*/ 186 } 187 argc -= optind; 188 argv += optind; 189 190 pid = getpid(); 191 if (tflag) 192 sock = open("/dev/null", O_WRONLY, 0); 193 else 194 sock = socket(PF_ROUTE, SOCK_RAW, 0); 195 if (sock < 0) 196 err(EXIT_FAILURE, "socket"); 197 198 if (*argv == NULL) { 199 if (doflush) 200 ch = K_FLUSH; 201 else 202 goto no_cmd; 203 } else 204 ch = keyword(*argv); 205 206 switch (ch) { 207 #ifndef SMALL 208 case K_GET: 209 #endif /* SMALL */ 210 case K_CHANGE: 211 case K_ADD: 212 case K_DELETE: 213 if (doflush) 214 (void)flushroutes(1, argv, 0); 215 return newroute(argc, argv); 216 217 case K_SHOW: 218 show(argc, argv); 219 return 0; 220 221 #ifndef SMALL 222 case K_MONITOR: 223 monitor(); 224 return 0; 225 226 #endif /* SMALL */ 227 case K_FLUSH: 228 return flushroutes(argc, argv, 0); 229 230 case K_FLUSHALL: 231 return flushroutes(argc, argv, 1); 232 no_cmd: 233 default: 234 usage(*argv); 235 /*NOTREACHED*/ 236 } 237 } 238 239 /* 240 * Purge all entries in the routing tables not 241 * associated with network interfaces. 242 */ 243 static int 244 flushroutes(int argc, char *argv[], int doall) 245 { 246 size_t needed; 247 int mib[6], rlen, seqno; 248 char *buf, *next, *lim; 249 struct rt_msghdr *rtm; 250 251 af = AF_UNSPEC; 252 shutdown(sock, SHUT_RD); /* Don't want to read back our messages */ 253 if (argc > 1) { 254 argv++; 255 if (argc == 2 && **argv == '-') { 256 switch (keyword(*argv + 1)) { 257 case K_INET: 258 af = AF_INET; 259 break; 260 #ifdef INET6 261 case K_INET6: 262 af = AF_INET6; 263 break; 264 #endif 265 #ifndef SMALL 266 case K_ATALK: 267 af = AF_APPLETALK; 268 break; 269 #endif /* SMALL */ 270 case K_LINK: 271 af = AF_LINK; 272 break; 273 #ifndef SMALL 274 case K_ISO: 275 case K_OSI: 276 af = AF_ISO; 277 break; 278 #endif /* SMALL */ 279 default: 280 goto bad; 281 } 282 } else 283 bad: usage(*argv); 284 } 285 mib[0] = CTL_NET; 286 mib[1] = PF_ROUTE; 287 mib[2] = 0; /* protocol */ 288 mib[3] = 0; /* wildcard address family */ 289 mib[4] = NET_RT_DUMP; 290 mib[5] = 0; /* no flags */ 291 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 292 err(EXIT_FAILURE, "route-sysctl-estimate"); 293 buf = lim = NULL; 294 if (needed) { 295 if ((buf = malloc(needed)) == NULL) 296 err(EXIT_FAILURE, "malloc"); 297 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 298 err(EXIT_FAILURE, "actual retrieval of routing table"); 299 lim = buf + needed; 300 } 301 if (verbose) { 302 (void)printf("Examining routing table from sysctl\n"); 303 if (af != AF_UNSPEC) 304 printf("(address family %s)\n", (*argv + 1)); 305 } 306 if (needed == 0) 307 return 0; 308 seqno = 0; /* ??? */ 309 for (next = buf; next < lim; next += rtm->rtm_msglen) { 310 rtm = (struct rt_msghdr *)next; 311 if (verbose) 312 print_rtmsg(rtm, rtm->rtm_msglen); 313 if (!(rtm->rtm_flags & (RTF_GATEWAY | RTF_STATIC | 314 RTF_LLINFO)) && !doall) 315 continue; 316 if (af != AF_UNSPEC) { 317 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 318 319 if (sa->sa_family != af) 320 continue; 321 } 322 if (debugonly) 323 continue; 324 rtm->rtm_type = RTM_DELETE; 325 rtm->rtm_seq = seqno; 326 if ((rlen = write(sock, next, rtm->rtm_msglen)) < 0) { 327 warnx("writing to routing socket: %s", 328 route_strerror(errno)); 329 return 1; 330 } 331 if (rlen < (int)rtm->rtm_msglen) { 332 warnx("write to routing socket, got %d for rlen", rlen); 333 return 1; 334 } 335 seqno++; 336 if (qflag) 337 continue; 338 if (verbose) 339 print_rtmsg(rtm, rlen); 340 else { 341 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 342 (void)printf("%-20.20s ", 343 routename(sa, NULL, rtm->rtm_flags)); 344 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 345 (void)printf("%-20.20s ", 346 routename(sa, NULL, RTF_HOST)); 347 (void)printf("done\n"); 348 } 349 } 350 free(buf); 351 return 0; 352 } 353 354 355 static char hexlist[] = "0123456789abcdef"; 356 357 static char * 358 any_ntoa(const struct sockaddr *sa) 359 { 360 static char obuf[3 * 256]; 361 const char *in; 362 char *out; 363 int len; 364 365 #if __GNUC__ > 2 366 len = sa->sa_len - offsetof(struct sockaddr, sa_data); 367 #else 368 len = sa->sa_len - ((struct sockaddr*)&sa->sa_data - sa); 369 #endif 370 in = sa->sa_data; 371 out = obuf; 372 373 do { 374 *out++ = hexlist[(*in >> 4) & 15]; 375 *out++ = hexlist[(*in++) & 15]; 376 *out++ = '.'; 377 } while (--len > 0); 378 out[-1] = '\0'; 379 return obuf; 380 } 381 382 int 383 netmask_length(struct sockaddr *nm, int family) 384 { 385 static int 386 /* number of bits in a nibble */ 387 _t[] = { 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4 }, 388 /* good nibbles are 1111, 1110, 1100, 1000, 0000 */ 389 _g[] = { 1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,1 }; 390 int mask, good, zeroes, maskbytes, bit, i; 391 unsigned char *maskdata; 392 393 if (nm == NULL) 394 return 0; 395 396 mask = 0; 397 good = 1; 398 zeroes = 0; 399 400 switch (family) { 401 case AF_INET: { 402 struct sockaddr_in *nsin = (struct sockaddr_in *)nm; 403 maskdata = (unsigned char *)&nsin->sin_addr; 404 maskbytes = nsin->sin_len - 405 ((caddr_t)&nsin->sin_addr - (caddr_t)nsin); 406 break; 407 } 408 case AF_INET6: { 409 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nm; 410 maskdata = (unsigned char *)&sin6->sin6_addr; 411 maskbytes = sin6->sin6_len - 412 ((caddr_t)&sin6->sin6_addr - (caddr_t)sin6); 413 break; 414 } 415 default: 416 return 0; 417 } 418 419 /* 420 * Count the bits in the nibbles of the mask, and marking the 421 * netmask as not good (or at best, non-standard and very 422 * discouraged, in the case of AF_INET) if we find either of 423 * a nibble with non-contiguous bits, or a non-zero nibble 424 * after we've found a zero nibble. 425 */ 426 for (i = 0; i < maskbytes; i++) { 427 /* high nibble */ 428 mask += bit = _t[maskdata[i] >> 4]; 429 good &= _g[maskdata[i] >> 4]; 430 if (zeroes && bit) 431 good = 0; 432 if (bit == 0) 433 zeroes = 1; 434 /* low nibble */ 435 mask += bit = _t[maskdata[i] & 0xf]; 436 good &= _g[maskdata[i] & 0xf]; 437 if (zeroes && bit) 438 good = 0; 439 if (bit == 0) 440 zeroes = 1; 441 } 442 443 /* 444 * Always return the number of bits found, but as a negative 445 * if the mask wasn't one we like. 446 */ 447 return good ? mask : -mask; 448 } 449 450 char * 451 netmask_string(struct sockaddr *mask, int len, int family) 452 { 453 static char smask[INET6_ADDRSTRLEN]; 454 struct sockaddr_in nsin; 455 struct sockaddr_in6 nsin6; 456 457 if (len >= 0) 458 snprintf(smask, sizeof(smask), "%d", len); 459 else { 460 switch (family) { 461 case AF_INET: 462 memset(&nsin, 0, sizeof(nsin)); 463 memcpy(&nsin, mask, mask->sa_len); 464 snprintf(smask, sizeof(smask), "%s", 465 inet_ntoa(nsin.sin_addr)); 466 break; 467 case AF_INET6: 468 memset(&nsin6, 0, sizeof(nsin6)); 469 memcpy(&nsin6, mask, mask->sa_len); 470 inet_ntop(family, &nsin6.sin6_addr, smask, 471 sizeof(smask)); 472 break; 473 default: 474 snprintf(smask, sizeof(smask), "%s", any_ntoa(mask)); 475 } 476 } 477 478 return smask; 479 } 480 481 const char * 482 routename(struct sockaddr *sa, struct sockaddr *nm, int flags) 483 { 484 const char *cp; 485 static char line[50]; 486 struct hostent *hp; 487 static char domain[MAXHOSTNAMELEN + 1]; 488 static int first = 1; 489 struct in_addr in; 490 int nml; 491 492 if ((flags & RTF_HOST) == 0) 493 return netname(sa, nm); 494 495 if (first) { 496 first = 0; 497 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 498 (cp = strchr(domain, '.'))) 499 (void)strlcpy(domain, cp + 1, sizeof(domain)); 500 else 501 domain[0] = 0; 502 } 503 504 if (sa->sa_len == 0) 505 strlcpy(line, "default", sizeof(line)); 506 else switch (sa->sa_family) { 507 508 case AF_INET: 509 in = ((struct sockaddr_in *)sa)->sin_addr; 510 nml = netmask_length(nm, AF_INET); 511 512 cp = 0; 513 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) { 514 if (nml == 0) 515 cp = "default"; 516 else { 517 static char notdefault[sizeof(NOTDEFSTRING)]; 518 519 snprintf(notdefault, sizeof(notdefault), 520 "0.0.0.0/%s", 521 netmask_string(nm, nml, AF_INET)); 522 cp = notdefault; 523 } 524 } 525 if (cp == 0 && !nflag) { 526 hp = gethostbyaddr((char *)&in, sizeof(struct in_addr), 527 AF_INET); 528 if (hp) { 529 char *ccp; 530 if ((ccp = strchr(hp->h_name, '.')) && 531 !strcmp(ccp + 1, domain)) 532 *ccp = '\0'; 533 cp = hp->h_name; 534 } 535 } 536 if (cp) 537 (void)strlcpy(line, cp, sizeof(line)); 538 else 539 (void)strlcpy(line, inet_ntoa(in), sizeof(line)); 540 break; 541 542 case AF_LINK: 543 return (link_ntoa((struct sockaddr_dl *)sa)); 544 545 #ifdef INET6 546 case AF_INET6: 547 { 548 struct sockaddr_in6 sin6; 549 int niflags; 550 char nihost[NI_MAXHOST]; 551 552 niflags = 0; 553 if (nflag) 554 niflags |= NI_NUMERICHOST; 555 memset(&sin6, 0, sizeof(sin6)); 556 memcpy(&sin6, sa, sa->sa_len); 557 sin6.sin6_len = sizeof(struct sockaddr_in6); 558 sin6.sin6_family = AF_INET6; 559 #ifdef __KAME__ 560 if (sa->sa_len == sizeof(struct sockaddr_in6) && 561 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 562 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 563 sin6.sin6_scope_id == 0) { 564 sin6.sin6_scope_id = 565 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 566 sin6.sin6_addr.s6_addr[2] = 0; 567 sin6.sin6_addr.s6_addr[3] = 0; 568 } 569 #endif 570 nml = netmask_length(nm, AF_INET6); 571 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 572 if (nml == 0) 573 strlcpy(line, "::", sizeof(line)); 574 else 575 /* noncontiguous never happens in ipv6 */ 576 snprintf(line, sizeof(line), "::/%d", nml); 577 } 578 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 579 nihost, sizeof(nihost), NULL, 0, niflags) != 0) 580 strlcpy(line, "invalid", sizeof(line)); 581 else { 582 char *ccp; 583 if (!nflag && (ccp = strchr(nihost, '.')) && 584 strcmp(ccp + 1, domain) == 0) 585 *ccp = '\0'; 586 strlcpy(line, nihost, sizeof(line)); 587 } 588 break; 589 } 590 #endif 591 592 #ifndef SMALL 593 case AF_ISO: 594 (void)snprintf(line, sizeof line, "iso %s", 595 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 596 break; 597 598 case AF_APPLETALK: 599 (void)snprintf(line, sizeof(line), "atalk %d.%d", 600 ((struct sockaddr_at *)sa)->sat_addr.s_net, 601 ((struct sockaddr_at *)sa)->sat_addr.s_node); 602 break; 603 #endif /* SMALL */ 604 605 default: 606 (void)snprintf(line, sizeof line, "(%d) %s", 607 sa->sa_family, any_ntoa(sa)); 608 break; 609 610 } 611 return (line); 612 } 613 614 /* 615 * Return the name of the network whose address is given. 616 * The address is assumed to be that of a net or subnet, not a host. 617 */ 618 const char * 619 netname(struct sockaddr *sa, struct sockaddr *nm) 620 { 621 const char *cp = 0; 622 static char line[50]; 623 struct netent *np = 0; 624 u_int32_t net, mask; 625 u_int32_t i; 626 int subnetshift, nml; 627 struct in_addr in; 628 629 switch (sa->sa_family) { 630 631 case AF_INET: 632 in = ((struct sockaddr_in *)sa)->sin_addr; 633 i = ntohl(in.s_addr); 634 nml = netmask_length(nm, AF_INET); 635 if (i == 0) { 636 if (nml == 0) 637 cp = "default"; 638 else { 639 static char notdefault[sizeof(NOTDEFSTRING)]; 640 641 snprintf(notdefault, sizeof(notdefault), 642 "0.0.0.0/%s", 643 netmask_string(nm, nml, AF_INET)); 644 cp = notdefault; 645 } 646 } 647 else if (!nflag) { 648 if (IN_CLASSA(i)) { 649 mask = IN_CLASSA_NET; 650 subnetshift = 8; 651 } else if (IN_CLASSB(i)) { 652 mask = IN_CLASSB_NET; 653 subnetshift = 8; 654 } else { 655 mask = IN_CLASSC_NET; 656 subnetshift = 4; 657 } 658 /* 659 * If there are more bits than the standard mask 660 * would suggest, subnets must be in use. 661 * Guess at the subnet mask, assuming reasonable 662 * width subnet fields. 663 */ 664 while (i &~ mask) 665 mask = (int32_t)mask >> subnetshift; 666 net = i & mask; 667 while ((mask & 1) == 0) 668 mask >>= 1, net >>= 1; 669 np = getnetbyaddr(net, AF_INET); 670 if (np) 671 cp = np->n_name; 672 } 673 if (cp) 674 (void)strlcpy(line, cp, sizeof(line)); 675 else { 676 if (nml == 0) 677 strlcpy(line, inet_ntoa(in), sizeof(line)); 678 else if (nml < 0) { 679 snprintf(line, sizeof(line), "%s&%s", 680 inet_ntoa(in), 681 netmask_string(nm, nml, AF_INET)); 682 } else { 683 snprintf(line, sizeof(line), "%s/%d", 684 inet_ntoa(in), nml); 685 } 686 } 687 break; 688 689 case AF_LINK: 690 return (link_ntoa((struct sockaddr_dl *)sa)); 691 692 #ifdef INET6 693 case AF_INET6: 694 { 695 struct sockaddr_in6 sin6; 696 int niflags; 697 698 niflags = 0; 699 if (nflag) 700 niflags |= NI_NUMERICHOST; 701 memset(&sin6, 0, sizeof(sin6)); 702 memcpy(&sin6, sa, sa->sa_len); 703 sin6.sin6_len = sizeof(struct sockaddr_in6); 704 sin6.sin6_family = AF_INET6; 705 #ifdef __KAME__ 706 if (sa->sa_len == sizeof(struct sockaddr_in6) && 707 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 708 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 709 sin6.sin6_scope_id == 0) { 710 sin6.sin6_scope_id = 711 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 712 sin6.sin6_addr.s6_addr[2] = 0; 713 sin6.sin6_addr.s6_addr[3] = 0; 714 } 715 #endif 716 nml = netmask_length(nm, AF_INET6); 717 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 718 if (nml == 0) 719 strlcpy(line, "::", sizeof(line)); 720 else 721 /* noncontiguous never happens in ipv6 */ 722 snprintf(line, sizeof(line), "::/%d", nml); 723 } 724 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 725 line, sizeof(line), NULL, 0, niflags) != 0) 726 strlcpy(line, "invalid", sizeof(line)); 727 break; 728 } 729 #endif 730 731 #ifndef SMALL 732 case AF_ISO: 733 (void)snprintf(line, sizeof line, "iso %s", 734 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 735 break; 736 737 case AF_APPLETALK: 738 (void)snprintf(line, sizeof(line), "atalk %d.%d", 739 ((struct sockaddr_at *)sa)->sat_addr.s_net, 740 ((struct sockaddr_at *)sa)->sat_addr.s_node); 741 break; 742 #endif /* SMALL */ 743 744 default: 745 (void)snprintf(line, sizeof line, "af %d: %s", 746 sa->sa_family, any_ntoa(sa)); 747 break; 748 } 749 return (line); 750 } 751 752 static const char * 753 route_strerror(int error) 754 { 755 756 switch (error) { 757 case ESRCH: 758 return "not in table"; 759 case EBUSY: 760 return "entry in use"; 761 case ENOBUFS: 762 return "routing table overflow"; 763 default: 764 return strerror(error); 765 } 766 } 767 768 static void 769 set_metric(char *value, int key) 770 { 771 int flag = 0; 772 u_long noval, *valp = &noval; 773 774 switch (key) { 775 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 776 caseof(K_MTU, RTV_MTU, rmx_mtu); 777 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 778 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 779 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 780 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 781 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 782 caseof(K_RTT, RTV_RTT, rmx_rtt); 783 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 784 } 785 rtm_inits |= flag; 786 if (lockrest || locking) 787 rt_metrics.rmx_locks |= flag; 788 if (locking) 789 locking = 0; 790 *valp = atoi(value); 791 } 792 793 static int 794 newroute(int argc, char **argv) 795 { 796 const char *cmd, *dest = "", *gateway = ""; 797 int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC; 798 int key; 799 struct hostent *hp = 0; 800 801 cmd = argv[0]; 802 af = AF_UNSPEC; 803 if (*cmd != 'g') 804 shutdown(sock, SHUT_RD); /* Don't want to read back our messages */ 805 while (--argc > 0) { 806 if (**(++argv)== '-') { 807 switch (key = keyword(1 + *argv)) { 808 809 case K_SA: 810 af = PF_ROUTE; 811 aflen = sizeof(union sockunion); 812 break; 813 814 #ifndef SMALL 815 case K_ATALK: 816 af = AF_APPLETALK; 817 aflen = sizeof(struct sockaddr_at); 818 break; 819 #endif 820 821 case K_INET: 822 af = AF_INET; 823 aflen = sizeof(struct sockaddr_in); 824 break; 825 826 #ifdef INET6 827 case K_INET6: 828 af = AF_INET6; 829 aflen = sizeof(struct sockaddr_in6); 830 break; 831 #endif 832 833 case K_LINK: 834 af = AF_LINK; 835 aflen = sizeof(struct sockaddr_dl); 836 break; 837 838 #ifndef SMALL 839 case K_OSI: 840 case K_ISO: 841 af = AF_ISO; 842 aflen = sizeof(struct sockaddr_iso); 843 break; 844 #endif /* SMALL */ 845 846 case K_IFACE: 847 case K_INTERFACE: 848 iflag++; 849 break; 850 case K_NOSTATIC: 851 flags &= ~RTF_STATIC; 852 break; 853 case K_LLINFO: 854 flags |= RTF_LLINFO; 855 break; 856 case K_LOCK: 857 locking = 1; 858 break; 859 case K_LOCKREST: 860 lockrest = 1; 861 break; 862 case K_HOST: 863 forcehost++; 864 break; 865 case K_REJECT: 866 flags |= RTF_REJECT; 867 break; 868 case K_BLACKHOLE: 869 flags |= RTF_BLACKHOLE; 870 break; 871 case K_CLONED: 872 flags |= RTF_CLONED; 873 break; 874 case K_NOCLONED: 875 flags &= ~RTF_CLONED; 876 break; 877 case K_PROTO1: 878 flags |= RTF_PROTO1; 879 break; 880 case K_PROTO2: 881 flags |= RTF_PROTO2; 882 break; 883 case K_CLONING: 884 flags |= RTF_CLONING; 885 break; 886 case K_NOCLONING: 887 flags &= ~RTF_CLONING; 888 break; 889 case K_XRESOLVE: 890 flags |= RTF_XRESOLVE; 891 break; 892 case K_STATIC: 893 flags |= RTF_STATIC; 894 break; 895 case K_IFA: 896 if (!--argc) 897 usage(1+*argv); 898 (void)getaddr(RTA_IFA, *++argv, 0); 899 break; 900 case K_IFP: 901 if (!--argc) 902 usage(1+*argv); 903 (void)getaddr(RTA_IFP, *++argv, 0); 904 break; 905 case K_GENMASK: 906 if (!--argc) 907 usage(1+*argv); 908 (void)getaddr(RTA_GENMASK, *++argv, 0); 909 break; 910 case K_GATEWAY: 911 if (!--argc) 912 usage(1+*argv); 913 (void)getaddr(RTA_GATEWAY, *++argv, 0); 914 break; 915 case K_DST: 916 if (!--argc) 917 usage(1+*argv); 918 ishost = getaddr(RTA_DST, *++argv, &hp); 919 dest = *argv; 920 break; 921 case K_NETMASK: 922 if (!--argc) 923 usage(1+*argv); 924 (void)getaddr(RTA_NETMASK, *++argv, 0); 925 /* FALLTHROUGH */ 926 case K_NET: 927 forcenet++; 928 break; 929 case K_PREFIXLEN: 930 if (!--argc) 931 usage(1+*argv); 932 ishost = prefixlen(*++argv); 933 break; 934 case K_MTU: 935 case K_HOPCOUNT: 936 case K_EXPIRE: 937 case K_RECVPIPE: 938 case K_SENDPIPE: 939 case K_SSTHRESH: 940 case K_RTT: 941 case K_RTTVAR: 942 if (!--argc) 943 usage(1+*argv); 944 set_metric(*++argv, key); 945 break; 946 default: 947 usage(1+*argv); 948 } 949 } else { 950 if ((rtm_addrs & RTA_DST) == 0) { 951 dest = *argv; 952 ishost = getaddr(RTA_DST, *argv, &hp); 953 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 954 gateway = *argv; 955 (void)getaddr(RTA_GATEWAY, *argv, &hp); 956 } else { 957 ret = atoi(*argv); 958 959 if (ret == 0) { 960 if (strcmp(*argv, "0") == 0) { 961 if (!qflag) { 962 warnx("%s, %s", 963 "old usage of trailing 0", 964 "assuming route to if"); 965 } 966 } else 967 usage(NULL); 968 iflag = 1; 969 continue; 970 } else if (ret > 0 && ret < 10) { 971 if (!qflag) { 972 warnx("%s, %s", 973 "old usage of trailing digit", 974 "assuming route via gateway"); 975 } 976 iflag = 0; 977 continue; 978 } 979 (void)getaddr(RTA_NETMASK, *argv, 0); 980 } 981 } 982 } 983 if (forcehost && forcenet) 984 errx(EXIT_FAILURE, "-host and -net conflict"); 985 else if (forcehost) 986 ishost = 1; 987 else if (forcenet) 988 ishost = 0; 989 flags |= RTF_UP; 990 if (ishost) 991 flags |= RTF_HOST; 992 if (iflag == 0) 993 flags |= RTF_GATEWAY; 994 for (attempts = 1; ; attempts++) { 995 errno = 0; 996 if ((ret = rtmsg(*cmd, flags)) == 0) 997 break; 998 if (errno != ENETUNREACH && errno != ESRCH) 999 break; 1000 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 1001 hp->h_addr_list++; 1002 memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0], 1003 hp->h_length); 1004 } else 1005 break; 1006 } 1007 if (*cmd == 'g') 1008 return (ret != 0); 1009 if (!qflag) { 1010 oerrno = errno; 1011 (void)printf("%s %s %s", cmd, ishost? "host" : "net", dest); 1012 if (*gateway) { 1013 (void)printf(": gateway %s", gateway); 1014 if (attempts > 1 && ret == 0 && af == AF_INET) 1015 (void)printf(" (%s)", 1016 inet_ntoa(so_gate.sin.sin_addr)); 1017 } 1018 if (ret == 0) 1019 (void)printf("\n"); 1020 else 1021 (void)printf(": %s\n", route_strerror(oerrno)); 1022 } 1023 return (ret != 0); 1024 } 1025 1026 static void 1027 inet_makenetandmask(u_int32_t net, struct sockaddr_in *isin) 1028 { 1029 u_int32_t addr, mask = 0; 1030 char *cp; 1031 1032 rtm_addrs |= RTA_NETMASK; 1033 if (net == 0) 1034 mask = addr = 0; 1035 else if (net < 128) { 1036 addr = net << IN_CLASSA_NSHIFT; 1037 mask = IN_CLASSA_NET; 1038 } else if (net < 192) { 1039 addr = net << IN_CLASSA_NSHIFT; 1040 mask = IN_CLASSB_NET; 1041 } else if (net < 224) { 1042 addr = net << IN_CLASSA_NSHIFT; 1043 mask = IN_CLASSC_NET; 1044 } else if (net < 256) { 1045 addr = net << IN_CLASSA_NSHIFT; 1046 mask = IN_CLASSD_NET; 1047 } else if (net < 49152) { /* 192 * 256 */ 1048 addr = net << IN_CLASSB_NSHIFT; 1049 mask = IN_CLASSB_NET; 1050 } else if (net < 57344) { /* 224 * 256 */ 1051 addr = net << IN_CLASSB_NSHIFT; 1052 mask = IN_CLASSC_NET; 1053 } else if (net < 65536) { 1054 addr = net << IN_CLASSB_NSHIFT; 1055 mask = IN_CLASSB_NET; 1056 } else if (net < 14680064L) { /* 224 * 65536 */ 1057 addr = net << IN_CLASSC_NSHIFT; 1058 mask = IN_CLASSC_NET; 1059 } else if (net < 16777216L) { 1060 addr = net << IN_CLASSC_NSHIFT; 1061 mask = IN_CLASSD_NET; 1062 } else { 1063 addr = net; 1064 if ((addr & IN_CLASSA_HOST) == 0) 1065 mask = IN_CLASSA_NET; 1066 else if ((addr & IN_CLASSB_HOST) == 0) 1067 mask = IN_CLASSB_NET; 1068 else if ((addr & IN_CLASSC_HOST) == 0) 1069 mask = IN_CLASSC_NET; 1070 else 1071 mask = -1; 1072 } 1073 isin->sin_addr.s_addr = htonl(addr); 1074 isin = &so_mask.sin; 1075 isin->sin_addr.s_addr = htonl(mask); 1076 isin->sin_len = 0; 1077 isin->sin_family = 0; 1078 cp = (char *)(&isin->sin_addr + 1); 1079 while (*--cp == 0 && cp > (char *)isin) 1080 ; 1081 isin->sin_len = 1 + cp - (char *)isin; 1082 isin->sin_family = AF_INET; 1083 } 1084 1085 #ifdef INET6 1086 /* 1087 * XXX the function may need more improvement... 1088 */ 1089 static int 1090 inet6_makenetandmask(struct sockaddr_in6 *sin6) 1091 { 1092 const char *plen; 1093 struct in6_addr in6; 1094 1095 plen = NULL; 1096 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1097 sin6->sin6_scope_id == 0) { 1098 plen = "0"; 1099 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1100 /* aggregatable global unicast - RFC2374 */ 1101 memset(&in6, 0, sizeof(in6)); 1102 if (!memcmp(&sin6->sin6_addr.s6_addr[8], &in6.s6_addr[8], 8)) 1103 plen = "64"; 1104 } 1105 1106 if (!plen || strcmp(plen, "128") == 0) 1107 return 1; 1108 else { 1109 rtm_addrs |= RTA_NETMASK; 1110 (void)prefixlen(plen); 1111 return 0; 1112 } 1113 } 1114 #endif 1115 1116 /* 1117 * Interpret an argument as a network address of some kind, 1118 * returning 1 if a host address, 0 if a network address. 1119 */ 1120 static int 1121 getaddr(int which, char *s, struct hostent **hpp) 1122 { 1123 sup su; 1124 struct hostent *hp; 1125 struct netent *np; 1126 u_int32_t val; 1127 char *t; 1128 int afamily; /* local copy of af so we can change it */ 1129 1130 if (af == AF_UNSPEC) { 1131 af = AF_INET; 1132 aflen = sizeof(struct sockaddr_in); 1133 } 1134 afamily = af; 1135 rtm_addrs |= which; 1136 switch (which) { 1137 case RTA_DST: 1138 su = &so_dst; 1139 break; 1140 case RTA_GATEWAY: 1141 su = &so_gate; 1142 break; 1143 case RTA_NETMASK: 1144 su = &so_mask; 1145 break; 1146 case RTA_GENMASK: 1147 su = &so_genmask; 1148 break; 1149 case RTA_IFP: 1150 su = &so_ifp; 1151 afamily = AF_LINK; 1152 break; 1153 case RTA_IFA: 1154 su = &so_ifa; 1155 su->sa.sa_family = af; 1156 break; 1157 default: 1158 su = NULL; 1159 usage("Internal Error"); 1160 /*NOTREACHED*/ 1161 } 1162 su->sa.sa_len = aflen; 1163 su->sa.sa_family = afamily; /* cases that don't want it have left already */ 1164 if (strcmp(s, "default") == 0) { 1165 switch (which) { 1166 case RTA_DST: 1167 forcenet++; 1168 (void)getaddr(RTA_NETMASK, s, 0); 1169 break; 1170 case RTA_NETMASK: 1171 case RTA_GENMASK: 1172 su->sa.sa_len = 0; 1173 } 1174 return (0); 1175 } 1176 switch (afamily) { 1177 #ifdef INET6 1178 case AF_INET6: 1179 { 1180 struct addrinfo hints, *res; 1181 char *slash = 0; 1182 1183 if (which == RTA_DST && (slash = (strrchr(s, '/'))) != 0) 1184 *slash = '\0'; 1185 memset(&hints, 0, sizeof(hints)); 1186 hints.ai_family = afamily; /*AF_INET6*/ 1187 hints.ai_flags = AI_NUMERICHOST; 1188 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1189 if (getaddrinfo(s, "0", &hints, &res) != 0) { 1190 hints.ai_flags = 0; 1191 if (slash) { 1192 *slash = '/'; 1193 slash = 0; 1194 } 1195 if (getaddrinfo(s, "0", &hints, &res) != 0) 1196 errx(EXIT_FAILURE, "%s: bad value", s); 1197 } 1198 if (slash) 1199 *slash = '/'; 1200 if (sizeof(su->sin6) != res->ai_addrlen) 1201 errx(EXIT_FAILURE, "%s: bad value", s); 1202 if (res->ai_next) { 1203 errx(EXIT_FAILURE, 1204 "%s: address resolved to multiple values", s); 1205 } 1206 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1207 freeaddrinfo(res); 1208 #ifdef __KAME__ 1209 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 1210 IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) && 1211 su->sin6.sin6_scope_id) { 1212 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 1213 htons(su->sin6.sin6_scope_id); 1214 su->sin6.sin6_scope_id = 0; 1215 } 1216 #endif 1217 if (hints.ai_flags == AI_NUMERICHOST) { 1218 if (slash) 1219 return (prefixlen(slash + 1)); 1220 if (which == RTA_DST) 1221 return (inet6_makenetandmask(&su->sin6)); 1222 return (0); 1223 } else 1224 return (1); 1225 } 1226 #endif 1227 1228 #ifndef SMALL 1229 case AF_OSI: 1230 su->siso.siso_addr = *iso_addr(s); 1231 if (which == RTA_NETMASK || which == RTA_GENMASK) { 1232 char *cp = (char *)TSEL(&su->siso); 1233 su->siso.siso_nlen = 0; 1234 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 1235 su->siso.siso_len = 1 + cp - (char *)su; 1236 } 1237 return (1); 1238 #endif /* SMALL */ 1239 1240 case PF_ROUTE: 1241 su->sa.sa_len = sizeof(*su); 1242 sockaddr(s, &su->sa); 1243 return (1); 1244 1245 #ifndef SMALL 1246 case AF_APPLETALK: 1247 t = strchr (s, '.'); 1248 if (!t) { 1249 badataddr: 1250 errx(EXIT_FAILURE, "bad address: %s", s); 1251 } 1252 val = atoi (s); 1253 if (val > 65535) 1254 goto badataddr; 1255 su->sat.sat_addr.s_net = val; 1256 val = atoi (t); 1257 if (val > 256) 1258 goto badataddr; 1259 su->sat.sat_addr.s_node = val; 1260 rtm_addrs |= RTA_NETMASK; 1261 return(forcehost || su->sat.sat_addr.s_node != 0); 1262 #endif 1263 1264 case AF_LINK: 1265 link_addr(s, &su->sdl); 1266 return (1); 1267 1268 case AF_INET: 1269 default: 1270 break; 1271 } 1272 1273 if (hpp == NULL) 1274 hpp = &hp; 1275 *hpp = NULL; 1276 1277 if ((t = strchr(s, '/')) != NULL && which == RTA_DST) { 1278 *t = '\0'; 1279 if (forcenet == 0) { 1280 if ((val = inet_addr(s)) != INADDR_NONE) { 1281 inet_makenetandmask(htonl(val), &su->sin); 1282 return prefixlen(&t[1]); 1283 } 1284 } else { 1285 if ((val = inet_network(s)) != INADDR_NONE) { 1286 inet_makenetandmask(val, &su->sin); 1287 return prefixlen(&t[1]); 1288 } 1289 } 1290 *t = '/'; 1291 } 1292 if (inet_aton(s, &su->sin.sin_addr) && 1293 (which != RTA_DST || forcenet == 0)) { 1294 val = su->sin.sin_addr.s_addr; 1295 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1296 return (1); 1297 else { 1298 val = ntohl(val); 1299 goto netdone; 1300 } 1301 } 1302 if ((val = inet_network(s)) != INADDR_NONE || 1303 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) { 1304 netdone: 1305 if (which == RTA_DST) 1306 inet_makenetandmask(val, &su->sin); 1307 return (0); 1308 } 1309 hp = gethostbyname(s); 1310 if (hp) { 1311 *hpp = hp; 1312 su->sin.sin_family = hp->h_addrtype; 1313 memmove(&su->sin.sin_addr, hp->h_addr, hp->h_length); 1314 return (1); 1315 } 1316 errx(EXIT_FAILURE, "%s: bad value", s); 1317 /*NOTREACHED*/ 1318 } 1319 1320 int 1321 prefixlen(const char *s) 1322 { 1323 int len = atoi(s), q, r; 1324 int max; 1325 1326 switch (af) { 1327 case AF_INET: 1328 max = sizeof(struct in_addr) * 8; 1329 break; 1330 #ifdef INET6 1331 case AF_INET6: 1332 max = sizeof(struct in6_addr) * 8; 1333 break; 1334 #endif 1335 default: 1336 errx(EXIT_FAILURE, "prefixlen is not supported with af %d", af); 1337 /*NOTREACHED*/ 1338 } 1339 1340 rtm_addrs |= RTA_NETMASK; 1341 if (len < -1 || len > max) 1342 errx(EXIT_FAILURE, "%s: bad value", s); 1343 1344 q = len >> 3; 1345 r = len & 7; 1346 switch (af) { 1347 case AF_INET: 1348 memset(&so_mask, 0, sizeof(so_mask)); 1349 so_mask.sin.sin_family = AF_INET; 1350 so_mask.sin.sin_len = sizeof(struct sockaddr_in); 1351 so_mask.sin.sin_addr.s_addr = htonl(0xffffffff << (32 - len)); 1352 break; 1353 #ifdef INET6 1354 case AF_INET6: 1355 so_mask.sin6.sin6_family = AF_INET6; 1356 so_mask.sin6.sin6_len = sizeof(struct sockaddr_in6); 1357 memset((void *)&so_mask.sin6.sin6_addr, 0, 1358 sizeof(so_mask.sin6.sin6_addr)); 1359 if (q > 0) 1360 memset((void *)&so_mask.sin6.sin6_addr, 0xff, q); 1361 if (r > 0) 1362 *((u_char *)&so_mask.sin6.sin6_addr + q) = 1363 (0xff00 >> r) & 0xff; 1364 break; 1365 #endif 1366 } 1367 return (len == max); 1368 } 1369 1370 #ifndef SMALL 1371 static void 1372 interfaces(void) 1373 { 1374 size_t needed; 1375 int mib[6]; 1376 char *buf, *lim, *next; 1377 struct rt_msghdr *rtm; 1378 1379 mib[0] = CTL_NET; 1380 mib[1] = PF_ROUTE; 1381 mib[2] = 0; /* protocol */ 1382 mib[3] = 0; /* wildcard address family */ 1383 mib[4] = NET_RT_IFLIST; 1384 mib[5] = 0; /* no flags */ 1385 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1386 err(EXIT_FAILURE, "route-sysctl-estimate"); 1387 if (needed) { 1388 if ((buf = malloc(needed)) == NULL) 1389 err(EXIT_FAILURE, "malloc"); 1390 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 1391 err(EXIT_FAILURE, 1392 "actual retrieval of interface table"); 1393 } 1394 lim = buf + needed; 1395 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1396 rtm = (struct rt_msghdr *)next; 1397 print_rtmsg(rtm, rtm->rtm_msglen); 1398 } 1399 free(buf); 1400 } 1401 } 1402 1403 static void 1404 monitor(void) 1405 { 1406 int n; 1407 char msg[2048]; 1408 1409 verbose = 1; 1410 if (debugonly) { 1411 interfaces(); 1412 exit(0); 1413 } 1414 for(;;) { 1415 time_t now; 1416 n = read(sock, msg, 2048); 1417 now = time(NULL); 1418 (void)printf("got message of size %d on %s", n, ctime(&now)); 1419 print_rtmsg((struct rt_msghdr *)msg, n); 1420 } 1421 } 1422 1423 #endif /* SMALL */ 1424 1425 1426 struct { 1427 struct rt_msghdr m_rtm; 1428 char m_space[512]; 1429 } m_rtmsg; 1430 1431 static int 1432 rtmsg(int cmd, int flags) 1433 { 1434 static int seq; 1435 int rlen; 1436 char *cp = m_rtmsg.m_space; 1437 int l; 1438 1439 #define NEXTADDR(w, u) \ 1440 if (rtm_addrs & (w)) {\ 1441 l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\ 1442 if (verbose && ! shortoutput) sodump(&(u),#u);\ 1443 } 1444 1445 errno = 0; 1446 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1447 if (cmd == 'a') 1448 cmd = RTM_ADD; 1449 else if (cmd == 'c') 1450 cmd = RTM_CHANGE; 1451 else if (cmd == 'g') { 1452 #ifdef SMALL 1453 return (-1); 1454 #else /* SMALL */ 1455 cmd = RTM_GET; 1456 if (so_ifp.sa.sa_family == 0) { 1457 so_ifp.sa.sa_family = AF_LINK; 1458 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1459 rtm_addrs |= RTA_IFP; 1460 } 1461 #endif /* SMALL */ 1462 } else 1463 cmd = RTM_DELETE; 1464 #define rtm m_rtmsg.m_rtm 1465 rtm.rtm_type = cmd; 1466 rtm.rtm_flags = flags; 1467 rtm.rtm_version = RTM_VERSION; 1468 rtm.rtm_seq = ++seq; 1469 rtm.rtm_addrs = rtm_addrs; 1470 rtm.rtm_rmx = rt_metrics; 1471 rtm.rtm_inits = rtm_inits; 1472 1473 if (rtm_addrs & RTA_NETMASK) 1474 mask_addr(); 1475 NEXTADDR(RTA_DST, so_dst); 1476 NEXTADDR(RTA_GATEWAY, so_gate); 1477 NEXTADDR(RTA_NETMASK, so_mask); 1478 NEXTADDR(RTA_GENMASK, so_genmask); 1479 NEXTADDR(RTA_IFP, so_ifp); 1480 NEXTADDR(RTA_IFA, so_ifa); 1481 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1482 if (verbose && ! shortoutput) { 1483 if (rtm_addrs) 1484 putchar('\n'); 1485 print_rtmsg(&rtm, l); 1486 } 1487 if (debugonly) 1488 return (0); 1489 if ((rlen = write(sock, (char *)&m_rtmsg, l)) < 0) { 1490 warnx("writing to routing socket: %s", route_strerror(errno)); 1491 return (-1); 1492 } 1493 if (rlen < l) { 1494 warnx("write to routing socket, got %d for rlen", rlen); 1495 return 1; 1496 } 1497 #ifndef SMALL 1498 if (cmd == RTM_GET) { 1499 do { 1500 l = read(sock, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1501 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1502 if (l < 0) 1503 err(EXIT_FAILURE, "read from routing socket"); 1504 else 1505 return print_getmsg(&rtm, l); 1506 } 1507 #endif /* SMALL */ 1508 #undef rtm 1509 return (0); 1510 } 1511 1512 static void 1513 mask_addr(void) 1514 { 1515 int olen = so_mask.sa.sa_len; 1516 char *cp1 = olen + (char *)&so_mask, *cp2; 1517 1518 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1519 if (*--cp1 != 0) { 1520 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1521 break; 1522 } 1523 if ((rtm_addrs & RTA_DST) == 0) 1524 return; 1525 switch (so_dst.sa.sa_family) { 1526 case AF_INET: 1527 #ifdef INET6 1528 case AF_INET6: 1529 #endif 1530 #ifndef SMALL 1531 case AF_APPLETALK: 1532 #endif /* SMALL */ 1533 case 0: 1534 return; 1535 #ifndef SMALL 1536 case AF_ISO: 1537 olen = MIN(so_dst.siso.siso_nlen, 1538 MAX(so_mask.sa.sa_len - 6, 0)); 1539 break; 1540 #endif /* SMALL */ 1541 } 1542 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1543 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1544 while (cp2 > cp1) 1545 *--cp2 = 0; 1546 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1547 while (cp1 > so_dst.sa.sa_data) 1548 *--cp1 &= *--cp2; 1549 #ifndef SMALL 1550 switch (so_dst.sa.sa_family) { 1551 case AF_ISO: 1552 so_dst.siso.siso_nlen = olen; 1553 break; 1554 } 1555 #endif /* SMALL */ 1556 } 1557 1558 const char *msgtypes[] = { 1559 "", 1560 "RTM_ADD: Add Route", 1561 "RTM_DELETE: Delete Route", 1562 "RTM_CHANGE: Change Metrics or flags", 1563 "RTM_GET: Report Metrics", 1564 "RTM_LOSING: Kernel Suspects Partitioning", 1565 "RTM_REDIRECT: Told to use different route", 1566 "RTM_MISS: Lookup failed on this address", 1567 "RTM_LOCK: fix specified metrics", 1568 "RTM_OLDADD: caused by SIOCADDRT", 1569 "RTM_OLDDEL: caused by SIOCDELRT", 1570 "RTM_RESOLVE: Route created by cloning", 1571 "RTM_NEWADDR: address being added to iface", 1572 "RTM_DELADDR: address being removed from iface", 1573 "RTM_OIFINFO: iface status change (pre-1.5)", 1574 "RTM_IFINFO: iface status change", 1575 "RTM_IFANNOUNCE: iface arrival/departure", 1576 "RTM_IEEE80211: IEEE80211 wireless event", 1577 0, 1578 }; 1579 1580 const char metricnames[] = 1581 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 1582 const char routeflags[] = 1583 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016CLONED\017PROTO2\020PROTO1"; 1584 const char ifnetflags[] = 1585 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST"; 1586 const char addrnames[] = 1587 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1588 1589 1590 #ifndef SMALL 1591 static const char * 1592 linkstate(struct if_msghdr *ifm) 1593 { 1594 static char buf[64]; 1595 1596 switch (ifm->ifm_data.ifi_link_state) { 1597 case LINK_STATE_UNKNOWN: 1598 return "carrier: unknown"; 1599 case LINK_STATE_DOWN: 1600 return "carrier: no carrier"; 1601 case LINK_STATE_UP: 1602 return "carrier: active"; 1603 default: 1604 (void)snprintf(buf, sizeof(buf), "carrier: 0x%x", 1605 ifm->ifm_data.ifi_link_state); 1606 return buf; 1607 } 1608 } 1609 #endif /* SMALL */ 1610 1611 static void 1612 print_rtmsg(struct rt_msghdr *rtm, int msglen) 1613 { 1614 struct if_msghdr *ifm; 1615 struct ifa_msghdr *ifam; 1616 struct if_announcemsghdr *ifan; 1617 union { 1618 struct ieee80211_join_event join; 1619 struct ieee80211_leave_event leave; 1620 struct ieee80211_replay_event replay; 1621 struct ieee80211_michael_event michael; 1622 } ev; 1623 size_t evlen = 0; 1624 1625 if (verbose == 0) 1626 return; 1627 if (rtm->rtm_version != RTM_VERSION) { 1628 (void)printf("routing message version %d not understood\n", 1629 rtm->rtm_version); 1630 return; 1631 } 1632 if (msgtypes[rtm->rtm_type]) 1633 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1634 else 1635 (void)printf("#%d: ", rtm->rtm_type); 1636 (void)printf("len %d, ", rtm->rtm_msglen); 1637 switch (rtm->rtm_type) { 1638 case RTM_IFINFO: 1639 ifm = (struct if_msghdr *)rtm; 1640 (void)printf("if# %d, %s, flags: ", ifm->ifm_index, 1641 #ifdef SMALL 1642 "" 1643 #else 1644 linkstate(ifm) 1645 #endif /* SMALL */ 1646 ); 1647 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1648 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1649 break; 1650 case RTM_NEWADDR: 1651 case RTM_DELADDR: 1652 ifam = (struct ifa_msghdr *)rtm; 1653 (void)printf("metric %d, flags: ", ifam->ifam_metric); 1654 bprintf(stdout, ifam->ifam_flags, routeflags); 1655 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1656 break; 1657 case RTM_IEEE80211: 1658 ifan = (struct if_announcemsghdr *)rtm; 1659 (void)printf("if# %d, what: ", ifan->ifan_index); 1660 switch (ifan->ifan_what) { 1661 case RTM_IEEE80211_ASSOC: 1662 printf("associate"); 1663 break; 1664 case RTM_IEEE80211_REASSOC: 1665 printf("re-associate"); 1666 break; 1667 case RTM_IEEE80211_DISASSOC: 1668 printf("disassociate"); 1669 break; 1670 case RTM_IEEE80211_SCAN: 1671 printf("scan complete"); 1672 break; 1673 case RTM_IEEE80211_JOIN: 1674 evlen = sizeof(ev.join); 1675 printf("join"); 1676 break; 1677 case RTM_IEEE80211_LEAVE: 1678 evlen = sizeof(ev.leave); 1679 printf("leave"); 1680 break; 1681 case RTM_IEEE80211_MICHAEL: 1682 evlen = sizeof(ev.michael); 1683 printf("michael"); 1684 break; 1685 case RTM_IEEE80211_REPLAY: 1686 evlen = sizeof(ev.replay); 1687 printf("replay"); 1688 break; 1689 default: 1690 evlen = 0; 1691 printf("#%d", ifan->ifan_what); 1692 break; 1693 } 1694 if (sizeof(*ifan) + evlen > ifan->ifan_msglen) { 1695 printf(" (truncated)\n"); 1696 break; 1697 } 1698 (void)memcpy(&ev, (ifan + 1), evlen); 1699 switch (ifan->ifan_what) { 1700 case RTM_IEEE80211_JOIN: 1701 case RTM_IEEE80211_LEAVE: 1702 printf(" mac %" PRIETHER, 1703 PRIETHER_ARGS(ev.join.iev_addr)); 1704 break; 1705 case RTM_IEEE80211_REPLAY: 1706 case RTM_IEEE80211_MICHAEL: 1707 printf(" src %" PRIETHER " dst %" PRIETHER 1708 " cipher %" PRIu8 " keyix %" PRIu8, 1709 PRIETHER_ARGS(ev.replay.iev_src), 1710 PRIETHER_ARGS(ev.replay.iev_dst), 1711 ev.replay.iev_cipher, 1712 ev.replay.iev_keyix); 1713 if (ifan->ifan_what == RTM_IEEE80211_REPLAY) { 1714 printf(" key rsc %#" PRIx64 1715 " frame rsc %#" PRIx64, 1716 ev.replay.iev_keyrsc, ev.replay.iev_rsc); 1717 } 1718 break; 1719 default: 1720 break; 1721 } 1722 printf("\n"); 1723 break; 1724 case RTM_IFANNOUNCE: 1725 ifan = (struct if_announcemsghdr *)rtm; 1726 (void)printf("if# %d, what: ", ifan->ifan_index); 1727 switch (ifan->ifan_what) { 1728 case IFAN_ARRIVAL: 1729 printf("arrival"); 1730 break; 1731 case IFAN_DEPARTURE: 1732 printf("departure"); 1733 break; 1734 default: 1735 printf("#%d", ifan->ifan_what); 1736 break; 1737 } 1738 printf("\n"); 1739 break; 1740 default: 1741 (void)printf("pid %d, seq %d, errno %d, flags: ", 1742 rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1743 bprintf(stdout, rtm->rtm_flags, routeflags); 1744 pmsg_common(rtm); 1745 } 1746 } 1747 1748 #ifndef SMALL 1749 static int 1750 print_getmsg(struct rt_msghdr *rtm, int msglen) 1751 { 1752 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL, *ifa = NULL; 1753 struct sockaddr_dl *ifp = NULL; 1754 struct sockaddr *sa; 1755 char *cp; 1756 int i; 1757 1758 if (! shortoutput) 1759 (void)printf(" route to: %s\n", 1760 routename((struct sockaddr *) &so_dst, NULL, RTF_HOST)); 1761 if (rtm->rtm_version != RTM_VERSION) { 1762 warnx("routing message version %d not understood", 1763 rtm->rtm_version); 1764 return 1; 1765 } 1766 if (rtm->rtm_msglen > msglen) { 1767 warnx("message length mismatch, in packet %d, returned %d", 1768 rtm->rtm_msglen, msglen); 1769 } 1770 if (rtm->rtm_errno) { 1771 warnx("RTM_GET: %s (errno %d)", 1772 strerror(rtm->rtm_errno), rtm->rtm_errno); 1773 return 1; 1774 } 1775 cp = ((char *)(rtm + 1)); 1776 if (rtm->rtm_addrs) 1777 for (i = 1; i; i <<= 1) 1778 if (i & rtm->rtm_addrs) { 1779 sa = (struct sockaddr *)cp; 1780 switch (i) { 1781 case RTA_DST: 1782 dst = sa; 1783 break; 1784 case RTA_GATEWAY: 1785 gate = sa; 1786 break; 1787 case RTA_NETMASK: 1788 mask = sa; 1789 break; 1790 case RTA_IFP: 1791 if (sa->sa_family == AF_LINK && 1792 ((struct sockaddr_dl *)sa)->sdl_nlen) 1793 ifp = (struct sockaddr_dl *)sa; 1794 break; 1795 case RTA_IFA: 1796 ifa = sa; 1797 break; 1798 } 1799 ADVANCE(cp, sa); 1800 } 1801 if (dst && mask) 1802 mask->sa_family = dst->sa_family; /* XXX */ 1803 if (dst && ! shortoutput) 1804 (void)printf("destination: %s\n", 1805 routename(dst, mask, RTF_HOST)); 1806 if (mask && ! shortoutput) { 1807 int savenflag = nflag; 1808 1809 nflag = 1; 1810 (void)printf(" mask: %s\n", 1811 routename(mask, NULL, RTF_HOST)); 1812 nflag = savenflag; 1813 } 1814 if (gate && rtm->rtm_flags & RTF_GATEWAY) { 1815 const char *name; 1816 1817 name = routename(gate, NULL, RTF_HOST); 1818 if (shortoutput) { 1819 if (*name == '\0') 1820 return (1); 1821 (void)printf("%s\n", name); 1822 } else 1823 (void)printf(" gateway: %s\n", name); 1824 } 1825 if (ifa && ! shortoutput) 1826 (void)printf(" local addr: %s\n", 1827 routename(ifa, NULL, RTF_HOST)); 1828 if (ifp && ! shortoutput) 1829 (void)printf(" interface: %.*s\n", 1830 ifp->sdl_nlen, ifp->sdl_data); 1831 if (! shortoutput) { 1832 (void)printf(" flags: "); 1833 bprintf(stdout, rtm->rtm_flags, routeflags); 1834 } 1835 1836 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1837 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1838 1839 if (! shortoutput) { 1840 (void)printf("\n%s\n", "\ 1841 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1842 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1843 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1844 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1845 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1846 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1847 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1848 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1849 if (rtm->rtm_rmx.rmx_expire) 1850 rtm->rtm_rmx.rmx_expire -= time(0); 1851 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1852 } 1853 #undef lock 1854 #undef msec 1855 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1856 1857 if (shortoutput) 1858 return ((rtm->rtm_addrs & RTF_GATEWAY) == 0); 1859 else if (verbose) 1860 pmsg_common(rtm); 1861 else if (rtm->rtm_addrs &~ RTA_IGN) { 1862 (void)printf("sockaddrs: "); 1863 bprintf(stdout, rtm->rtm_addrs, addrnames); 1864 putchar('\n'); 1865 } 1866 return 0; 1867 #undef RTA_IGN 1868 } 1869 #endif /* SMALL */ 1870 1871 void 1872 pmsg_common(struct rt_msghdr *rtm) 1873 { 1874 (void)printf("\nlocks: "); 1875 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1876 (void)printf(" inits: "); 1877 bprintf(stdout, rtm->rtm_inits, metricnames); 1878 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1879 } 1880 1881 static void 1882 pmsg_addrs(char *cp, int addrs) 1883 { 1884 struct sockaddr *sa[RTAX_MAX]; 1885 int i, nmf; 1886 1887 if (addrs != 0) { 1888 (void)printf("\nsockaddrs: "); 1889 bprintf(stdout, addrs, addrnames); 1890 (void)putchar('\n'); 1891 nmf = -1; 1892 for (i = 0; i < RTAX_MAX; i++) { 1893 if ((1 << i) & addrs) { 1894 sa[i] = (struct sockaddr *)cp; 1895 if ((i == RTAX_DST || i == RTAX_IFA) && 1896 nmf == -1) 1897 nmf = sa[i]->sa_family; 1898 ADVANCE(cp, sa[i]); 1899 } else 1900 sa[i] = NULL; 1901 } 1902 for (i = 0; i < RTAX_MAX; i++) { 1903 if (sa[i] != NULL) { 1904 if (i == RTAX_NETMASK && sa[i]->sa_len) 1905 (void)printf(" %s", 1906 netmask_string(sa[i], -1, nmf)); 1907 else 1908 (void)printf(" %s", 1909 routename(sa[i], NULL, RTF_HOST)); 1910 } 1911 } 1912 } 1913 (void)putchar('\n'); 1914 (void)fflush(stdout); 1915 } 1916 1917 static void 1918 bprintf(FILE *fp, int b, const char *f) 1919 { 1920 int i; 1921 int gotsome = 0; 1922 const uint8_t *s = (const uint8_t *)f; 1923 1924 if (b == 0) 1925 return; 1926 while ((i = *s++) != 0) { 1927 if (b & (1 << (i-1))) { 1928 if (gotsome == 0) 1929 i = '<'; 1930 else 1931 i = ','; 1932 (void)putc(i, fp); 1933 gotsome = 1; 1934 for (; (i = *s) > 32; s++) 1935 (void)putc(i, fp); 1936 } else 1937 while (*s > 32) 1938 s++; 1939 } 1940 if (gotsome) 1941 (void)putc('>', fp); 1942 } 1943 1944 int 1945 keyword(char *cp) 1946 { 1947 struct keytab *kt = keywords; 1948 1949 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1950 kt++; 1951 return kt->kt_i; 1952 } 1953 1954 static void 1955 sodump(sup su, const char *which) 1956 { 1957 #ifdef INET6 1958 char ntop_buf[NI_MAXHOST]; 1959 #endif 1960 1961 switch (su->sa.sa_family) { 1962 case AF_INET: 1963 (void)printf("%s: inet %s; ", 1964 which, inet_ntoa(su->sin.sin_addr)); 1965 break; 1966 #ifndef SMALL 1967 case AF_APPLETALK: 1968 (void)printf("%s: atalk %d.%d; ", 1969 which, su->sat.sat_addr.s_net, su->sat.sat_addr.s_node); 1970 break; 1971 #endif 1972 case AF_LINK: 1973 (void)printf("%s: link %s; ", 1974 which, link_ntoa(&su->sdl)); 1975 break; 1976 #ifdef INET6 1977 case AF_INET6: 1978 (void)printf("%s: inet6 %s; ", 1979 which, inet_ntop(AF_INET6, &su->sin6.sin6_addr, 1980 ntop_buf, sizeof(ntop_buf))); 1981 break; 1982 #endif 1983 #ifndef SMALL 1984 case AF_ISO: 1985 (void)printf("%s: iso %s; ", 1986 which, iso_ntoa(&su->siso.siso_addr)); 1987 break; 1988 #endif /* SMALL */ 1989 default: 1990 (void)printf("%s: (%d) %s; ", 1991 which, su->sa.sa_family, any_ntoa(&su->sa)); 1992 } 1993 (void)fflush(stdout); 1994 } 1995 1996 /* States*/ 1997 #define VIRGIN 0 1998 #define GOTONE 1 1999 #define GOTTWO 2 2000 /* Inputs */ 2001 #define DIGIT (4*0) 2002 #define END (4*1) 2003 #define DELIM (4*2) 2004 2005 static void 2006 sockaddr(char *addr, struct sockaddr *sa) 2007 { 2008 char *cp = (char *)sa; 2009 int size = sa->sa_len; 2010 char *cplim = cp + size; 2011 int byte = 0, state = VIRGIN, new = 0; 2012 2013 (void)memset(cp, 0, size); 2014 cp++; 2015 do { 2016 if ((*addr >= '0') && (*addr <= '9')) { 2017 new = *addr - '0'; 2018 } else if ((*addr >= 'a') && (*addr <= 'f')) { 2019 new = *addr - 'a' + 10; 2020 } else if ((*addr >= 'A') && (*addr <= 'F')) { 2021 new = *addr - 'A' + 10; 2022 } else if (*addr == 0) 2023 state |= END; 2024 else 2025 state |= DELIM; 2026 addr++; 2027 switch (state /* | INPUT */) { 2028 case GOTTWO | DIGIT: 2029 *cp++ = byte; /*FALLTHROUGH*/ 2030 case VIRGIN | DIGIT: 2031 state = GOTONE; byte = new; continue; 2032 case GOTONE | DIGIT: 2033 state = GOTTWO; byte = new + (byte << 4); continue; 2034 default: /* | DELIM */ 2035 state = VIRGIN; *cp++ = byte; byte = 0; continue; 2036 case GOTONE | END: 2037 case GOTTWO | END: 2038 *cp++ = byte; /* FALLTHROUGH */ 2039 case VIRGIN | END: 2040 break; 2041 } 2042 break; 2043 } while (cp < cplim); 2044 sa->sa_len = cp - (char *)sa; 2045 } 2046
Indexes created Sun Sep 28 16:09:52 GMT 2025