route.c revision 1.50
1 /* $NetBSD: route.c,v 1.50 2001/10/24 18:40:16 atatat Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1989, 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1983, 1989, 1991, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)route.c 8.6 (Berkeley) 4/28/95"; 45 #else 46 __RCSID("$NetBSD: route.c,v 1.50 2001/10/24 18:40:16 atatat Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 #include <sys/param.h> 51 #include <sys/file.h> 52 #include <sys/socket.h> 53 #include <sys/ioctl.h> 54 #include <sys/mbuf.h> 55 #include <sys/sysctl.h> 56 57 #include <net/if.h> 58 #include <net/route.h> 59 #include <net/if_dl.h> 60 #include <netinet/in.h> 61 #include <netatalk/at.h> 62 #include <netns/ns.h> 63 #include <netiso/iso.h> 64 #include <netccitt/x25.h> 65 #include <arpa/inet.h> 66 #include <netdb.h> 67 68 #include <errno.h> 69 #include <unistd.h> 70 #include <stdio.h> 71 #include <ctype.h> 72 #include <stdlib.h> 73 #include <string.h> 74 #include <time.h> 75 #include <paths.h> 76 #include <err.h> 77 78 #include "keywords.h" 79 #include "extern.h" 80 81 typedef union sockunion *sup; 82 83 int main __P((int, char **)); 84 static void usage __P((char *)); 85 static char *any_ntoa __P((const struct sockaddr *)); 86 static void set_metric __P((char *, int)); 87 static void newroute __P((int, char **)); 88 static void inet_makenetandmask __P((u_int32_t, struct sockaddr_in *)); 89 #ifdef INET6 90 static void inet6_makenetandmask __P((struct sockaddr_in6 *)); 91 #endif 92 static int getaddr __P((int, char *, struct hostent **)); 93 static void flushroutes __P((int, char *[])); 94 #ifndef SMALL 95 static int prefixlen __P((char *)); 96 static int x25_makemask __P((void)); 97 static void interfaces __P((void)); 98 static void monitor __P((void)); 99 static void print_getmsg __P((struct rt_msghdr *, int)); 100 #endif 101 static int rtmsg __P((int, int )); 102 static void mask_addr __P((void)); 103 static void print_rtmsg __P((struct rt_msghdr *, int)); 104 static void pmsg_common __P((struct rt_msghdr *)); 105 static void pmsg_addrs __P((char *, int)); 106 static void bprintf __P((FILE *, int, u_char *)); 107 static int keyword __P((char *)); 108 static void sodump __P((sup, char *)); 109 static void sockaddr __P((char *, struct sockaddr *)); 110 111 union sockunion { 112 struct sockaddr sa; 113 struct sockaddr_in sin; 114 #ifdef INET6 115 struct sockaddr_in6 sin6; 116 #endif 117 struct sockaddr_at sat; 118 struct sockaddr_dl sdl; 119 #ifndef SMALL 120 struct sockaddr_ns sns; 121 struct sockaddr_iso siso; 122 struct sockaddr_x25 sx25; 123 #endif /* SMALL */ 124 } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp; 125 126 int pid, rtm_addrs; 127 int s; 128 int forcehost, forcenet, doflush, nflag, af, qflag, tflag; 129 int iflag, verbose, aflen = sizeof (struct sockaddr_in); 130 int locking, lockrest, debugonly, shortoutput, rv; 131 struct rt_metrics rt_metrics; 132 u_int32_t rtm_inits; 133 short ns_nullh[] = {0,0,0}; 134 short ns_bh[] = {-1,-1,-1}; 135 136 137 static void 138 usage(cp) 139 char *cp; 140 { 141 142 if (cp) 143 warnx("botched keyword: %s", cp); 144 (void) fprintf(stderr, 145 "Usage: %s [ -fnqvs ] cmd [[ -<qualifers> ] args ]\n", 146 getprogname()); 147 exit(1); 148 /* NOTREACHED */ 149 } 150 151 #define ROUNDUP(a) \ 152 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 153 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 154 155 int 156 main(argc, argv) 157 int argc; 158 char **argv; 159 { 160 int ch; 161 162 if (argc < 2) 163 usage(NULL); 164 165 while ((ch = getopt(argc, argv, "fnqvdts")) != -1) 166 switch(ch) { 167 case 'f': 168 doflush = 1; 169 break; 170 case 'n': 171 nflag = 1; 172 break; 173 case 'q': 174 qflag = 1; 175 break; 176 case 'v': 177 verbose = 1; 178 break; 179 case 't': 180 tflag = 1; 181 break; 182 case 'd': 183 debugonly = 1; 184 break; 185 case 's': 186 shortoutput = 1; 187 break; 188 case '?': 189 default: 190 usage(NULL); 191 } 192 argc -= optind; 193 argv += optind; 194 195 pid = getpid(); 196 if (tflag) 197 s = open("/dev/null", O_WRONLY, 0); 198 else 199 s = socket(PF_ROUTE, SOCK_RAW, 0); 200 if (s < 0) 201 err(1, "socket"); 202 203 if (*argv == NULL) { 204 if (doflush) 205 ch = K_FLUSH; 206 else 207 goto no_cmd; 208 } else 209 ch = keyword(*argv); 210 211 switch (ch) { 212 213 #ifndef SMALL 214 case K_GET: 215 #endif /* SMALL */ 216 case K_CHANGE: 217 case K_ADD: 218 case K_DELETE: 219 if (doflush) 220 flushroutes(1, argv); 221 newroute(argc, argv); 222 break; 223 224 case K_SHOW: 225 show(argc, argv); 226 break; 227 228 #ifndef SMALL 229 case K_MONITOR: 230 monitor(); 231 break; 232 233 #endif /* SMALL */ 234 case K_FLUSH: 235 flushroutes(argc, argv); 236 break; 237 238 no_cmd: 239 default: 240 usage(*argv); 241 return 1; 242 } 243 return 0; 244 } 245 246 /* 247 * Purge all entries in the routing tables not 248 * associated with network interfaces. 249 */ 250 static void 251 flushroutes(argc, argv) 252 int argc; 253 char *argv[]; 254 { 255 size_t needed; 256 int mib[6], rlen, seqno; 257 char *buf, *next, *lim; 258 struct rt_msghdr *rtm; 259 260 af = 0; 261 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 262 if (argc > 1) { 263 argv++; 264 if (argc == 2 && **argv == '-') 265 switch (keyword(*argv + 1)) { 266 case K_INET: 267 af = AF_INET; 268 break; 269 #ifdef INET6 270 case K_INET6: 271 af = AF_INET6; 272 break; 273 #endif 274 case K_ATALK: 275 af = AF_APPLETALK; 276 break; 277 #ifndef SMALL 278 case K_XNS: 279 af = AF_NS; 280 break; 281 #endif /* SMALL */ 282 case K_LINK: 283 af = AF_LINK; 284 break; 285 #ifndef SMALL 286 case K_ISO: 287 case K_OSI: 288 af = AF_ISO; 289 break; 290 case K_X25: 291 af = AF_CCITT; 292 #endif /* SMALL */ 293 default: 294 goto bad; 295 } else 296 bad: usage(*argv); 297 } 298 mib[0] = CTL_NET; 299 mib[1] = PF_ROUTE; 300 mib[2] = 0; /* protocol */ 301 mib[3] = 0; /* wildcard address family */ 302 mib[4] = NET_RT_DUMP; 303 mib[5] = 0; /* no flags */ 304 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 305 err(1, "route-sysctl-estimate"); 306 if (needed == 0) 307 return; 308 if ((buf = malloc(needed)) == NULL) 309 err(1, "malloc"); 310 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 311 err(1, "actual retrieval of routing table"); 312 lim = buf + needed; 313 if (verbose) { 314 (void) printf("Examining routing table from sysctl\n"); 315 if (af) printf("(address family %s)\n", (*argv + 1)); 316 } 317 seqno = 0; /* ??? */ 318 for (next = buf; next < lim; next += rtm->rtm_msglen) { 319 rtm = (struct rt_msghdr *)next; 320 if (verbose) 321 print_rtmsg(rtm, rtm->rtm_msglen); 322 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 323 continue; 324 if (af) { 325 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 326 327 if (sa->sa_family != af) 328 continue; 329 } 330 if (debugonly) 331 continue; 332 rtm->rtm_type = RTM_DELETE; 333 rtm->rtm_seq = seqno; 334 rlen = write(s, next, rtm->rtm_msglen); 335 if (rlen < (int)rtm->rtm_msglen) { 336 warn("write to routing socket, got %d for rlen", rlen); 337 break; 338 } 339 seqno++; 340 if (qflag) 341 continue; 342 if (verbose) 343 print_rtmsg(rtm, rlen); 344 else { 345 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 346 (void) printf("%-20.20s ", 347 routename(sa, NULL, rtm->rtm_flags)); 348 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 349 (void) printf("%-20.20s ", 350 routename(sa, NULL, RTF_HOST)); 351 (void) printf("done\n"); 352 } 353 } 354 } 355 356 357 static char hexlist[] = "0123456789abcdef"; 358 359 static char * 360 any_ntoa(sa) 361 const struct sockaddr *sa; 362 { 363 static char obuf[64]; 364 const char *in; 365 char *out; 366 int len; 367 368 len = sa->sa_len; 369 in = sa->sa_data; 370 out = obuf; 371 372 do { 373 *out++ = hexlist[(*in >> 4) & 15]; 374 *out++ = hexlist[(*in++) & 15]; 375 *out++ = '.'; 376 } while (--len > 0); 377 out[-1] = '\0'; 378 return obuf; 379 } 380 381 382 int 383 netmask_length(nm, af) 384 struct sockaddr *nm; 385 int af; 386 { 387 static int 388 /* number of bits in a nibble */ 389 _t[] = { 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4 }, 390 /* good nibbles are 1111, 1110, 1100, 1000, 0000 */ 391 _g[] = { 1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,1 }; 392 int mask, good, zeroes, maskbytes, bit, i; 393 unsigned char *maskdata; 394 395 if (nm == NULL) 396 return 0; 397 398 mask = 0; 399 good = 1; 400 zeroes = 0; 401 402 switch (af) { 403 case AF_INET: { 404 struct sockaddr_in *sin = (struct sockaddr_in *)nm; 405 maskdata = (unsigned char *) &sin->sin_addr; 406 maskbytes = sin->sin_len - 407 ((caddr_t)&sin->sin_addr - (caddr_t)sin); 408 break; 409 } 410 case AF_INET6: { 411 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nm; 412 maskdata = (unsigned char *) &sin6->sin6_addr; 413 maskbytes = sin6->sin6_len - 414 ((caddr_t)&sin6->sin6_addr - (caddr_t)sin6); 415 break; 416 } 417 default: 418 return 0; 419 } 420 421 /* 422 * Count the bits in the nibbles of the mask, and marking the 423 * netmask as not good (or at best, non-standard and very 424 * discouraged, in the case of AF_INET) if we find either of 425 * a nibble with non-contiguous bits, or a non-zero nibble 426 * after we've found a zero nibble. 427 */ 428 for (i = 0; i < maskbytes; i++) { 429 /* high nibble */ 430 mask += bit = _t[maskdata[i] >> 4]; 431 good &= _g[maskdata[i] >> 4]; 432 if (zeroes && bit) 433 good = 0; 434 if (bit == 0) 435 zeroes = 1; 436 /* low nibble */ 437 mask += bit = _t[maskdata[i] & 0xf]; 438 good &= _g[maskdata[i] & 0xf]; 439 if (zeroes && bit) 440 good = 0; 441 if (bit == 0) 442 zeroes = 1; 443 } 444 445 /* 446 * Always return the number of bits found, but as a negative 447 * if the mask wasn't one we like. 448 */ 449 return good ? mask : -mask; 450 } 451 452 char * 453 netmask_string(mask, len) 454 struct sockaddr *mask; 455 int len; 456 { 457 static char smask[16]; 458 459 if (len >= 0) 460 snprintf(smask, sizeof(smask), "%d", len); 461 else { 462 /* XXX AF_INET only?! */ 463 struct sockaddr_in sin; 464 465 memset(&sin, 0, sizeof(sin)); 466 memcpy(&sin, mask, mask->sa_len); 467 snprintf(smask, sizeof(smask), "%s", inet_ntoa(sin.sin_addr)); 468 } 469 470 return smask; 471 } 472 473 474 char * 475 routename(sa, nm, flags) 476 struct sockaddr *sa, *nm; 477 int flags; 478 { 479 char *cp; 480 static char line[50]; 481 struct hostent *hp; 482 static char domain[MAXHOSTNAMELEN + 1]; 483 static int first = 1; 484 struct in_addr in; 485 int nml; 486 487 if ((flags & RTF_HOST) == 0) 488 return netname(sa, nm); 489 490 if (first) { 491 first = 0; 492 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 493 (cp = strchr(domain, '.'))) { 494 (void)strncpy(domain, cp + 1, sizeof(domain) - 1); 495 domain[sizeof(domain) - 1] = '\0'; 496 } else 497 domain[0] = 0; 498 } 499 500 if (sa->sa_len == 0) { 501 strncpy(line, "default", sizeof(line) - 1); 502 line[sizeof(line) - 1] = '\0'; 503 } else switch (sa->sa_family) { 504 505 case AF_INET: 506 in = ((struct sockaddr_in *)sa)->sin_addr; 507 nml = netmask_length(nm, AF_INET); 508 509 cp = 0; 510 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) { 511 if (nml == 0) 512 cp = "default"; 513 else { 514 static char notdefault[sizeof(NOTDEFSTRING)]; 515 516 snprintf(notdefault, sizeof(notdefault), 517 "0.0.0.0/%s", netmask_string(nm, nml)); 518 cp = notdefault; 519 } 520 } 521 if (cp == 0 && !nflag) { 522 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 523 AF_INET); 524 if (hp) { 525 if ((cp = strchr(hp->h_name, '.')) && 526 !strcmp(cp + 1, domain)) 527 *cp = 0; 528 cp = hp->h_name; 529 } 530 } 531 if (cp) 532 (void)strncpy(line, cp, sizeof(line) - 1); 533 else 534 (void)strncpy(line, inet_ntoa(in), sizeof(line) - 1); 535 line[sizeof(line) - 1] = '\0'; 536 break; 537 538 case AF_LINK: 539 return (link_ntoa((struct sockaddr_dl *)sa)); 540 541 #ifndef SMALL 542 #ifdef INET6 543 case AF_INET6: 544 { 545 struct sockaddr_in6 sin6; 546 int niflags; 547 548 #ifdef NI_WITHSCOPEID 549 niflags = NI_WITHSCOPEID; 550 #else 551 niflags = 0; 552 #endif 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 strncpy(line, "::", sizeof(line) - 1); 574 line[sizeof(line) - 1] = '\0'; 575 } 576 else 577 /* noncontiguous never happens in ipv6 */ 578 snprintf(line, sizeof(line), "::/%d", nml); 579 } 580 581 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 582 line, sizeof(line), NULL, 0, niflags) != 0) 583 strncpy(line, "invalid", sizeof(line)); 584 break; 585 } 586 #endif 587 588 case AF_NS: 589 return (ns_print((struct sockaddr_ns *)sa)); 590 591 case AF_ISO: 592 (void)snprintf(line, sizeof line, "iso %s", 593 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 594 break; 595 #endif /* SMALL */ 596 597 case AF_APPLETALK: 598 (void) snprintf(line, sizeof(line), "atalk %d.%d", 599 ((struct sockaddr_at *)sa)->sat_addr.s_net, 600 ((struct sockaddr_at *)sa)->sat_addr.s_node); 601 break; 602 603 default: 604 (void)snprintf(line, sizeof line, "(%d) %s", 605 sa->sa_family, any_ntoa(sa)); 606 break; 607 608 } 609 return (line); 610 } 611 612 /* 613 * Return the name of the network whose address is given. 614 * The address is assumed to be that of a net or subnet, not a host. 615 */ 616 char * 617 netname(sa, nm) 618 struct sockaddr *sa, *nm; 619 { 620 char *cp = 0; 621 static char line[50]; 622 struct netent *np = 0; 623 u_int32_t net, mask; 624 u_int32_t i; 625 int subnetshift, nml; 626 struct in_addr in; 627 628 switch (sa->sa_family) { 629 630 case AF_INET: 631 in = ((struct sockaddr_in *)sa)->sin_addr; 632 i = ntohl(in.s_addr); 633 nml = netmask_length(nm, AF_INET); 634 if (i == 0) { 635 if (nml == 0) 636 cp = "default"; 637 else { 638 static char notdefault[sizeof(NOTDEFSTRING)]; 639 640 snprintf(notdefault, sizeof(notdefault), 641 "0.0.0.0/%s", netmask_string(nm, nml)); 642 cp = notdefault; 643 } 644 } 645 else if (!nflag) { 646 if (IN_CLASSA(i)) { 647 mask = IN_CLASSA_NET; 648 subnetshift = 8; 649 } else if (IN_CLASSB(i)) { 650 mask = IN_CLASSB_NET; 651 subnetshift = 8; 652 } else { 653 mask = IN_CLASSC_NET; 654 subnetshift = 4; 655 } 656 /* 657 * If there are more bits than the standard mask 658 * would suggest, subnets must be in use. 659 * Guess at the subnet mask, assuming reasonable 660 * width subnet fields. 661 */ 662 while (i &~ mask) 663 mask = (int32_t)mask >> subnetshift; 664 net = i & mask; 665 while ((mask & 1) == 0) 666 mask >>= 1, net >>= 1; 667 np = getnetbyaddr(net, AF_INET); 668 if (np) 669 cp = np->n_name; 670 } 671 if (cp) { 672 (void)strncpy(line, cp, sizeof(line) - 1); 673 line[sizeof(line) - 1] = '\0'; 674 } else { 675 #if 0 /* XXX - This is silly... */ 676 #define C(x) ((x) & 0xff) 677 if ((i & 0xffffff) == 0) 678 (void)snprintf(line, sizeof line, "%u", 679 C(i >> 24)); 680 else if ((i & 0xffff) == 0) 681 (void)snprintf(line, sizeof line, "%u.%u", 682 C(i >> 24), C(i >> 16)); 683 else if ((i & 0xff) == 0) 684 (void)snprintf(line, sizeof line, "%u.%u.%u", 685 C(i >> 24), C(i >> 16), C(i >> 8)); 686 else 687 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", 688 C(i >> 24), C(i >> 16), C(i >> 8), C(i)); 689 #undef C 690 #else /* XXX */ 691 (void)strncpy(line, inet_ntoa(in), sizeof(line) - 1); 692 #endif /* XXX */ 693 } 694 break; 695 696 case AF_LINK: 697 return (link_ntoa((struct sockaddr_dl *)sa)); 698 699 #ifndef SMALL 700 #ifdef INET6 701 case AF_INET6: 702 { 703 struct sockaddr_in6 sin6; 704 int niflags; 705 706 #ifdef NI_WITHSCOPEID 707 niflags = NI_WITHSCOPEID; 708 #else 709 niflags = 0; 710 #endif 711 if (nflag) 712 niflags |= NI_NUMERICHOST; 713 memset(&sin6, 0, sizeof(sin6)); 714 memcpy(&sin6, sa, sa->sa_len); 715 sin6.sin6_len = sizeof(struct sockaddr_in6); 716 sin6.sin6_family = AF_INET6; 717 #ifdef __KAME__ 718 if (sa->sa_len == sizeof(struct sockaddr_in6) && 719 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 720 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 721 sin6.sin6_scope_id == 0) { 722 sin6.sin6_scope_id = 723 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 724 sin6.sin6_addr.s6_addr[2] = 0; 725 sin6.sin6_addr.s6_addr[3] = 0; 726 } 727 #endif 728 nml = netmask_length(nm, AF_INET6); 729 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 730 if (nml == 0) { 731 strncpy(line, "::", sizeof(line) - 1); 732 line[sizeof(line) - 1] = '\0'; 733 } 734 else 735 /* noncontiguous never happens in ipv6 */ 736 snprintf(line, sizeof(line), "::/%d", nml); 737 } 738 739 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 740 line, sizeof(line), NULL, 0, niflags) != 0) 741 strncpy(line, "invalid", sizeof(line)); 742 break; 743 } 744 #endif 745 746 case AF_NS: 747 return (ns_print((struct sockaddr_ns *)sa)); 748 749 case AF_ISO: 750 (void)snprintf(line, sizeof line, "iso %s", 751 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 752 break; 753 #endif /* SMALL */ 754 755 case AF_APPLETALK: 756 (void) snprintf(line, sizeof(line), "atalk %d.%d", 757 ((struct sockaddr_at *)sa)->sat_addr.s_net, 758 ((struct sockaddr_at *)sa)->sat_addr.s_node); 759 break; 760 761 default: 762 (void)snprintf(line, sizeof line, "af %d: %s", 763 sa->sa_family, any_ntoa(sa)); 764 break; 765 } 766 return (line); 767 } 768 769 static void 770 set_metric(value, key) 771 char *value; 772 int key; 773 { 774 int flag = 0; 775 u_long noval, *valp = &noval; 776 777 switch (key) { 778 #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 779 caseof(K_MTU, RTV_MTU, rmx_mtu); 780 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 781 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 782 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 783 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 784 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 785 caseof(K_RTT, RTV_RTT, rmx_rtt); 786 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 787 } 788 rtm_inits |= flag; 789 if (lockrest || locking) 790 rt_metrics.rmx_locks |= flag; 791 if (locking) 792 locking = 0; 793 *valp = atoi(value); 794 } 795 796 static void 797 newroute(argc, argv) 798 int argc; 799 char **argv; 800 { 801 char *cmd, *dest = "", *gateway = ""; 802 const char *err; 803 int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC; 804 int key; 805 struct hostent *hp = 0; 806 807 cmd = argv[0]; 808 af = 0; 809 if (*cmd != 'g') 810 shutdown(s, SHUT_RD); /* Don't want to read back our messages */ 811 while (--argc > 0) { 812 if (**(++argv)== '-') { 813 switch (key = keyword(1 + *argv)) { 814 815 case K_SA: 816 af = PF_ROUTE; 817 aflen = sizeof(union sockunion); 818 break; 819 820 case K_ATALK: 821 af = AF_APPLETALK; 822 aflen = sizeof(struct sockaddr_at); 823 break; 824 825 case K_INET: 826 af = AF_INET; 827 aflen = sizeof(struct sockaddr_in); 828 break; 829 830 #ifdef INET6 831 case K_INET6: 832 af = AF_INET6; 833 aflen = sizeof(struct sockaddr_in6); 834 break; 835 #endif 836 837 case K_LINK: 838 af = AF_LINK; 839 aflen = sizeof(struct sockaddr_dl); 840 break; 841 842 #ifndef SMALL 843 case K_OSI: 844 case K_ISO: 845 af = AF_ISO; 846 aflen = sizeof(struct sockaddr_iso); 847 break; 848 849 case K_X25: 850 af = AF_CCITT; 851 aflen = sizeof(struct sockaddr_x25); 852 break; 853 854 case K_XNS: 855 af = AF_NS; 856 aflen = sizeof(struct sockaddr_ns); 857 break; 858 #endif /* SMALL */ 859 860 case K_IFACE: 861 case K_INTERFACE: 862 iflag++; 863 break; 864 case K_NOSTATIC: 865 flags &= ~RTF_STATIC; 866 break; 867 case K_LLINFO: 868 flags |= RTF_LLINFO; 869 break; 870 case K_LOCK: 871 locking = 1; 872 break; 873 case K_LOCKREST: 874 lockrest = 1; 875 break; 876 case K_HOST: 877 forcehost++; 878 break; 879 case K_REJECT: 880 flags |= RTF_REJECT; 881 break; 882 case K_BLACKHOLE: 883 flags |= RTF_BLACKHOLE; 884 break; 885 case K_CLONED: 886 flags |= RTF_CLONED; 887 break; 888 case K_PROTO1: 889 flags |= RTF_PROTO1; 890 break; 891 case K_PROTO2: 892 flags |= RTF_PROTO2; 893 break; 894 case K_CLONING: 895 flags |= RTF_CLONING; 896 break; 897 case K_XRESOLVE: 898 flags |= RTF_XRESOLVE; 899 break; 900 case K_STATIC: 901 flags |= RTF_STATIC; 902 break; 903 case K_IFA: 904 if (!--argc) 905 usage(1+*argv); 906 (void) getaddr(RTA_IFA, *++argv, 0); 907 break; 908 case K_IFP: 909 if (!--argc) 910 usage(1+*argv); 911 (void) getaddr(RTA_IFP, *++argv, 0); 912 break; 913 case K_GENMASK: 914 if (!--argc) 915 usage(1+*argv); 916 (void) getaddr(RTA_GENMASK, *++argv, 0); 917 break; 918 case K_GATEWAY: 919 if (!--argc) 920 usage(1+*argv); 921 (void) getaddr(RTA_GATEWAY, *++argv, 0); 922 break; 923 case K_DST: 924 if (!--argc) 925 usage(1+*argv); 926 ishost = getaddr(RTA_DST, *++argv, &hp); 927 dest = *argv; 928 break; 929 case K_NETMASK: 930 if (!--argc) 931 usage(1+*argv); 932 (void) getaddr(RTA_NETMASK, *++argv, 0); 933 /* FALLTHROUGH */ 934 case K_NET: 935 forcenet++; 936 break; 937 case K_PREFIXLEN: 938 argc--; 939 if (prefixlen(*++argv) == 128) { 940 forcenet = 0; 941 ishost = 1; 942 } else { 943 forcenet = 1; 944 ishost = 0; 945 } 946 break; 947 case K_MTU: 948 case K_HOPCOUNT: 949 case K_EXPIRE: 950 case K_RECVPIPE: 951 case K_SENDPIPE: 952 case K_SSTHRESH: 953 case K_RTT: 954 case K_RTTVAR: 955 if (!--argc) 956 usage(1+*argv); 957 set_metric(*++argv, key); 958 break; 959 default: 960 usage(1+*argv); 961 } 962 } else { 963 if ((rtm_addrs & RTA_DST) == 0) { 964 dest = *argv; 965 ishost = getaddr(RTA_DST, *argv, &hp); 966 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 967 gateway = *argv; 968 (void) getaddr(RTA_GATEWAY, *argv, &hp); 969 } else { 970 int ret = atoi(*argv); 971 972 if (ret == 0) { 973 if (!qflag && strcmp(*argv, "0") == 0) 974 warnx("%s, %s", 975 "old usage of trailing 0", 976 "assuming route to if"); 977 else 978 usage((char *)NULL); 979 iflag = 1; 980 continue; 981 } else if (ret > 0 && ret < 10) { 982 if (!qflag) { 983 warnx("%s, %s", 984 "old usage of trailing digit", 985 "assuming route via gateway"); 986 } 987 iflag = 0; 988 continue; 989 } 990 (void) getaddr(RTA_NETMASK, *argv, 0); 991 } 992 } 993 } 994 if (forcehost) 995 ishost = 1; 996 if (forcenet) 997 ishost = 0; 998 flags |= RTF_UP; 999 if (ishost) 1000 flags |= RTF_HOST; 1001 if (iflag == 0) 1002 flags |= RTF_GATEWAY; 1003 for (attempts = 1; ; attempts++) { 1004 errno = 0; 1005 if ((ret = rtmsg(*cmd, flags)) == 0) 1006 break; 1007 if (errno != ENETUNREACH && errno != ESRCH) 1008 break; 1009 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 1010 hp->h_addr_list++; 1011 memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0], 1012 hp->h_length); 1013 } else 1014 break; 1015 } 1016 if (*cmd == 'g') 1017 exit(rv); 1018 oerrno = errno; 1019 if (!qflag) { 1020 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 1021 if (*gateway) { 1022 (void) printf(": gateway %s", gateway); 1023 if (attempts > 1 && ret == 0 && af == AF_INET) 1024 (void) printf(" (%s)", 1025 inet_ntoa(so_gate.sin.sin_addr)); 1026 } 1027 if (ret == 0) 1028 (void) printf("\n"); 1029 } 1030 if (ret != 0) { 1031 switch (oerrno) { 1032 case ESRCH: 1033 err = "not in table"; 1034 break; 1035 case EBUSY: 1036 err = "entry in use"; 1037 break; 1038 case ENOBUFS: 1039 err = "routing table overflow"; 1040 break; 1041 default: 1042 err = strerror(oerrno); 1043 break; 1044 } 1045 (void) printf(": %s\n", err); 1046 } 1047 } 1048 1049 static void 1050 inet_makenetandmask(net, sin) 1051 u_int32_t net; 1052 struct sockaddr_in *sin; 1053 { 1054 u_int32_t addr, mask = 0; 1055 char *cp; 1056 1057 rtm_addrs |= RTA_NETMASK; 1058 if (net == 0) 1059 mask = addr = 0; 1060 else if (net < 128) { 1061 addr = net << IN_CLASSA_NSHIFT; 1062 mask = IN_CLASSA_NET; 1063 } else if (net < 65536) { 1064 addr = net << IN_CLASSB_NSHIFT; 1065 mask = IN_CLASSB_NET; 1066 } else if (net < 16777216L) { 1067 addr = net << IN_CLASSC_NSHIFT; 1068 mask = IN_CLASSC_NET; 1069 } else { 1070 addr = net; 1071 if ((addr & IN_CLASSA_HOST) == 0) 1072 mask = IN_CLASSA_NET; 1073 else if ((addr & IN_CLASSB_HOST) == 0) 1074 mask = IN_CLASSB_NET; 1075 else if ((addr & IN_CLASSC_HOST) == 0) 1076 mask = IN_CLASSC_NET; 1077 else 1078 mask = -1; 1079 } 1080 sin->sin_addr.s_addr = htonl(addr); 1081 sin = &so_mask.sin; 1082 sin->sin_addr.s_addr = htonl(mask); 1083 sin->sin_len = 0; 1084 sin->sin_family = 0; 1085 cp = (char *)(&sin->sin_addr + 1); 1086 while (*--cp == 0 && cp > (char *)sin) 1087 ; 1088 sin->sin_len = 1 + cp - (char *)sin; 1089 } 1090 1091 #ifdef INET6 1092 /* 1093 * XXX the function may need more improvement... 1094 */ 1095 static void 1096 inet6_makenetandmask(sin6) 1097 struct sockaddr_in6 *sin6; 1098 { 1099 char *plen; 1100 struct in6_addr in6; 1101 1102 plen = NULL; 1103 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1104 sin6->sin6_scope_id == 0) { 1105 plen = "0"; 1106 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1107 /* aggregatable global unicast - RFC2374 */ 1108 memset(&in6, 0, sizeof(in6)); 1109 if (!memcmp(&sin6->sin6_addr.s6_addr[8], &in6.s6_addr[8], 8)) 1110 plen = "64"; 1111 else 1112 plen = "128"; 1113 } 1114 1115 if (plen) { 1116 rtm_addrs |= RTA_NETMASK; 1117 prefixlen(plen); 1118 } 1119 } 1120 #endif 1121 1122 /* 1123 * Interpret an argument as a network address of some kind, 1124 * returning 1 if a host address, 0 if a network address. 1125 */ 1126 static int 1127 getaddr(which, s, hpp) 1128 int which; 1129 char *s; 1130 struct hostent **hpp; 1131 { 1132 sup su; 1133 struct hostent *hp; 1134 struct netent *np; 1135 u_int32_t val; 1136 char *t; 1137 int afamily; /* local copy of af so we can change it */ 1138 1139 if (af == 0) { 1140 af = AF_INET; 1141 aflen = sizeof(struct sockaddr_in); 1142 } 1143 afamily = af; 1144 rtm_addrs |= which; 1145 switch (which) { 1146 case RTA_DST: 1147 su = &so_dst; 1148 break; 1149 case RTA_GATEWAY: 1150 su = &so_gate; 1151 break; 1152 case RTA_NETMASK: 1153 su = &so_mask; 1154 break; 1155 case RTA_GENMASK: 1156 su = &so_genmask; 1157 break; 1158 case RTA_IFP: 1159 su = &so_ifp; 1160 afamily = AF_LINK; 1161 break; 1162 case RTA_IFA: 1163 su = &so_ifa; 1164 su->sa.sa_family = af; 1165 break; 1166 default: 1167 su = NULL; 1168 usage("Internal Error"); 1169 /*NOTREACHED*/ 1170 } 1171 su->sa.sa_len = aflen; 1172 su->sa.sa_family = afamily; /* cases that don't want it have left already */ 1173 if (strcmp(s, "default") == 0) { 1174 switch (which) { 1175 case RTA_DST: 1176 forcenet++; 1177 (void) getaddr(RTA_NETMASK, s, 0); 1178 break; 1179 case RTA_NETMASK: 1180 case RTA_GENMASK: 1181 su->sa.sa_len = 0; 1182 } 1183 return (0); 1184 } 1185 switch (afamily) { 1186 #ifndef SMALL 1187 #ifdef INET6 1188 case AF_INET6: 1189 { 1190 struct addrinfo hints, *res; 1191 1192 memset(&hints, 0, sizeof(hints)); 1193 hints.ai_family = afamily; /*AF_INET6*/ 1194 hints.ai_flags = AI_NUMERICHOST; 1195 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1196 if (getaddrinfo(s, "0", &hints, &res) != 0 || 1197 res->ai_family != AF_INET6 || 1198 res->ai_addrlen != sizeof(su->sin6)) { 1199 (void) fprintf(stderr, "%s: bad value\n", s); 1200 exit(1); 1201 } 1202 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1203 #ifdef __KAME__ 1204 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 1205 IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) && 1206 su->sin6.sin6_scope_id) { 1207 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 1208 htons(su->sin6.sin6_scope_id); 1209 su->sin6.sin6_scope_id = 0; 1210 } 1211 #endif 1212 if (which == RTA_DST) 1213 inet6_makenetandmask(&su->sin6); 1214 freeaddrinfo(res); 1215 return 0; 1216 } 1217 #endif 1218 1219 case AF_NS: 1220 if (which == RTA_DST) { 1221 struct sockaddr_ns *sms = &(so_mask.sns); 1222 memset(sms, 0, sizeof(*sms)); 1223 sms->sns_family = 0; 1224 sms->sns_len = 6; 1225 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 1226 rtm_addrs |= RTA_NETMASK; 1227 } 1228 su->sns.sns_addr = ns_addr(s); 1229 return (!ns_nullhost(su->sns.sns_addr)); 1230 1231 case AF_OSI: 1232 su->siso.siso_addr = *iso_addr(s); 1233 if (which == RTA_NETMASK || which == RTA_GENMASK) { 1234 char *cp = (char *)TSEL(&su->siso); 1235 su->siso.siso_nlen = 0; 1236 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 1237 su->siso.siso_len = 1 + cp - (char *)su; 1238 } 1239 return (1); 1240 1241 case AF_CCITT: 1242 ccitt_addr(s, &su->sx25); 1243 return (which == RTA_DST ? x25_makemask() : 1); 1244 #endif /* SMALL */ 1245 1246 case PF_ROUTE: 1247 su->sa.sa_len = sizeof(*su); 1248 sockaddr(s, &su->sa); 1249 return (1); 1250 1251 case AF_APPLETALK: 1252 t = strchr (s, '.'); 1253 if (!t) { 1254 badataddr: 1255 errx(1, "bad address: %s", s); 1256 } 1257 val = atoi (s); 1258 if (val > 65535) 1259 goto badataddr; 1260 su->sat.sat_addr.s_net = val; 1261 val = atoi (t); 1262 if (val > 256) 1263 goto badataddr; 1264 su->sat.sat_addr.s_node = val; 1265 rtm_addrs |= RTA_NETMASK; 1266 return(forcehost || su->sat.sat_addr.s_node != 0); 1267 1268 case AF_LINK: 1269 link_addr(s, &su->sdl); 1270 return (1); 1271 1272 case AF_INET: 1273 default: 1274 break; 1275 } 1276 1277 if (hpp == NULL) 1278 hpp = &hp; 1279 *hpp = NULL; 1280 if (((val = inet_addr(s)) != INADDR_NONE) && 1281 (which != RTA_DST || forcenet == 0)) { 1282 su->sin.sin_addr.s_addr = val; 1283 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1284 return (1); 1285 else { 1286 val = ntohl(val); 1287 goto netdone; 1288 } 1289 } 1290 if ((val = inet_network(s)) != INADDR_NONE || 1291 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) { 1292 netdone: 1293 if (which == RTA_DST) 1294 inet_makenetandmask(val, &su->sin); 1295 return (0); 1296 } 1297 hp = gethostbyname(s); 1298 if (hp) { 1299 *hpp = hp; 1300 su->sin.sin_family = hp->h_addrtype; 1301 memmove(&su->sin.sin_addr, hp->h_addr, hp->h_length); 1302 return (1); 1303 } 1304 errx(1, "bad value: %s", s); 1305 } 1306 1307 int 1308 prefixlen(s) 1309 char *s; 1310 { 1311 int len = atoi(s), q, r; 1312 int max; 1313 1314 switch (af) { 1315 case AF_INET: 1316 max = sizeof(struct in_addr) * 8; 1317 break; 1318 #ifdef INET6 1319 case AF_INET6: 1320 max = sizeof(struct in6_addr) * 8; 1321 break; 1322 #endif 1323 default: 1324 (void) fprintf(stderr, 1325 "prefixlen is not supported with af %d\n", af); 1326 exit(1); 1327 } 1328 1329 rtm_addrs |= RTA_NETMASK; 1330 if (len < -1 || len > max) { 1331 (void) fprintf(stderr, "%s: bad value\n", s); 1332 exit(1); 1333 } 1334 1335 q = len >> 3; 1336 r = len & 7; 1337 switch (af) { 1338 case AF_INET: 1339 memset(&so_mask, 0, sizeof(so_mask)); 1340 so_mask.sin.sin_family = AF_INET; 1341 so_mask.sin.sin_len = sizeof(struct sockaddr_in); 1342 so_mask.sin.sin_addr.s_addr = htonl(0xffffffff << (32 - len)); 1343 break; 1344 #ifdef INET6 1345 case AF_INET6: 1346 so_mask.sin6.sin6_family = AF_INET6; 1347 so_mask.sin6.sin6_len = sizeof(struct sockaddr_in6); 1348 memset((void *)&so_mask.sin6.sin6_addr, 0, 1349 sizeof(so_mask.sin6.sin6_addr)); 1350 if (q > 0) 1351 memset((void *)&so_mask.sin6.sin6_addr, 0xff, q); 1352 if (r > 0) 1353 *((u_char *)&so_mask.sin6.sin6_addr + q) = 1354 (0xff00 >> r) & 0xff; 1355 break; 1356 #endif 1357 } 1358 return(len); 1359 } 1360 1361 #ifndef SMALL 1362 int 1363 x25_makemask() 1364 { 1365 char *cp; 1366 1367 if ((rtm_addrs & RTA_NETMASK) == 0) { 1368 rtm_addrs |= RTA_NETMASK; 1369 for (cp = (char *)&so_mask.sx25.x25_net; 1370 cp < &so_mask.sx25.x25_opts.op_flags; cp++) 1371 *cp = -1; 1372 so_mask.sx25.x25_len = (u_char)&(((sup)0)->sx25.x25_opts); 1373 } 1374 return 0; 1375 } 1376 1377 1378 char * 1379 ns_print(sns) 1380 struct sockaddr_ns *sns; 1381 { 1382 struct ns_addr work; 1383 union { union ns_net net_e; u_int32_t int32_t_e; } net; 1384 u_short port; 1385 static char mybuf[50], cport[10], chost[25]; 1386 char *host = ""; 1387 char *p; 1388 u_char *q; 1389 1390 work = sns->sns_addr; 1391 port = ntohs(work.x_port); 1392 work.x_port = 0; 1393 net.net_e = work.x_net; 1394 if (ns_nullhost(work) && net.int32_t_e == 0) { 1395 if (!port) 1396 return ("*.*"); 1397 (void)snprintf(mybuf, sizeof mybuf, "*.%XH", port); 1398 return (mybuf); 1399 } 1400 1401 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) 1402 host = "any"; 1403 else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) 1404 host = "*"; 1405 else { 1406 q = work.x_host.c_host; 1407 (void)snprintf(chost, sizeof chost, "%02X%02X%02X%02X%02X%02XH", 1408 q[0], q[1], q[2], q[3], q[4], q[5]); 1409 for (p = chost; *p == '0' && p < chost + 12; p++) 1410 /* void */; 1411 host = p; 1412 } 1413 if (port) 1414 (void)snprintf(cport, sizeof cport, ".%XH", htons(port)); 1415 else 1416 *cport = 0; 1417 1418 (void)snprintf(mybuf, sizeof mybuf, "%XH.%s%s", 1419 (u_int32_t)ntohl(net.int32_t_e), host, cport); 1420 return (mybuf); 1421 } 1422 1423 static void 1424 interfaces() 1425 { 1426 size_t needed; 1427 int mib[6]; 1428 char *buf, *lim, *next; 1429 struct rt_msghdr *rtm; 1430 1431 mib[0] = CTL_NET; 1432 mib[1] = PF_ROUTE; 1433 mib[2] = 0; /* protocol */ 1434 mib[3] = 0; /* wildcard address family */ 1435 mib[4] = NET_RT_IFLIST; 1436 mib[5] = 0; /* no flags */ 1437 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1438 err(1, "route-sysctl-estimate"); 1439 if ((buf = malloc(needed)) == NULL) 1440 err(1, "malloc"); 1441 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 1442 err(1, "actual retrieval of interface table"); 1443 lim = buf + needed; 1444 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1445 rtm = (struct rt_msghdr *)next; 1446 print_rtmsg(rtm, rtm->rtm_msglen); 1447 } 1448 } 1449 1450 static void 1451 monitor() 1452 { 1453 int n; 1454 char msg[2048]; 1455 1456 verbose = 1; 1457 if (debugonly) { 1458 interfaces(); 1459 exit(0); 1460 } 1461 for(;;) { 1462 time_t now; 1463 n = read(s, msg, 2048); 1464 now = time(NULL); 1465 (void) printf("got message of size %d on %s", n, ctime(&now)); 1466 print_rtmsg((struct rt_msghdr *)msg, n); 1467 } 1468 } 1469 1470 #endif /* SMALL */ 1471 1472 1473 struct { 1474 struct rt_msghdr m_rtm; 1475 char m_space[512]; 1476 } m_rtmsg; 1477 1478 static int 1479 rtmsg(cmd, flags) 1480 int cmd, flags; 1481 { 1482 static int seq; 1483 int rlen; 1484 char *cp = m_rtmsg.m_space; 1485 int l; 1486 1487 #define NEXTADDR(w, u) \ 1488 if (rtm_addrs & (w)) {\ 1489 l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\ 1490 if (verbose && ! shortoutput) sodump(&(u),"u");\ 1491 } 1492 1493 errno = 0; 1494 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1495 if (cmd == 'a') 1496 cmd = RTM_ADD; 1497 else if (cmd == 'c') 1498 cmd = RTM_CHANGE; 1499 else if (cmd == 'g') { 1500 #ifdef SMALL 1501 return (-1); 1502 #else /* SMALL */ 1503 cmd = RTM_GET; 1504 if (so_ifp.sa.sa_family == 0) { 1505 so_ifp.sa.sa_family = AF_LINK; 1506 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1507 rtm_addrs |= RTA_IFP; 1508 } 1509 #endif /* SMALL */ 1510 } else 1511 cmd = RTM_DELETE; 1512 #define rtm m_rtmsg.m_rtm 1513 rtm.rtm_type = cmd; 1514 rtm.rtm_flags = flags; 1515 rtm.rtm_version = RTM_VERSION; 1516 rtm.rtm_seq = ++seq; 1517 rtm.rtm_addrs = rtm_addrs; 1518 rtm.rtm_rmx = rt_metrics; 1519 rtm.rtm_inits = rtm_inits; 1520 1521 if (rtm_addrs & RTA_NETMASK) 1522 mask_addr(); 1523 NEXTADDR(RTA_DST, so_dst); 1524 NEXTADDR(RTA_GATEWAY, so_gate); 1525 NEXTADDR(RTA_NETMASK, so_mask); 1526 NEXTADDR(RTA_GENMASK, so_genmask); 1527 NEXTADDR(RTA_IFP, so_ifp); 1528 NEXTADDR(RTA_IFA, so_ifa); 1529 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1530 if (verbose && ! shortoutput) 1531 print_rtmsg(&rtm, l); 1532 if (debugonly) 1533 return (0); 1534 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1535 perror("writing to routing socket"); 1536 return (-1); 1537 } 1538 #ifndef SMALL 1539 if (cmd == RTM_GET) { 1540 do { 1541 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1542 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1543 if (l < 0) 1544 err(1, "read from routing socket"); 1545 else 1546 print_getmsg(&rtm, l); 1547 } 1548 #endif /* SMALL */ 1549 #undef rtm 1550 return (0); 1551 } 1552 1553 static void 1554 mask_addr() 1555 { 1556 int olen = so_mask.sa.sa_len; 1557 char *cp1 = olen + (char *)&so_mask, *cp2; 1558 1559 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1560 if (*--cp1 != 0) { 1561 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1562 break; 1563 } 1564 if ((rtm_addrs & RTA_DST) == 0) 1565 return; 1566 switch (so_dst.sa.sa_family) { 1567 case AF_INET: 1568 #ifdef INET6 1569 case AF_INET6: 1570 #endif 1571 case AF_APPLETALK: 1572 #ifndef SMALL 1573 case AF_NS: 1574 case AF_CCITT: 1575 #endif /* SMALL */ 1576 case 0: 1577 return; 1578 #ifndef SMALL 1579 case AF_ISO: 1580 olen = MIN(so_dst.siso.siso_nlen, 1581 MAX(so_mask.sa.sa_len - 6, 0)); 1582 break; 1583 #endif /* SMALL */ 1584 } 1585 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1586 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1587 while (cp2 > cp1) 1588 *--cp2 = 0; 1589 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1590 while (cp1 > so_dst.sa.sa_data) 1591 *--cp1 &= *--cp2; 1592 #ifndef SMALL 1593 switch (so_dst.sa.sa_family) { 1594 case AF_ISO: 1595 so_dst.siso.siso_nlen = olen; 1596 break; 1597 } 1598 #endif /* SMALL */ 1599 } 1600 1601 char *msgtypes[] = { 1602 "", 1603 "RTM_ADD: Add Route", 1604 "RTM_DELETE: Delete Route", 1605 "RTM_CHANGE: Change Metrics or flags", 1606 "RTM_GET: Report Metrics", 1607 "RTM_LOSING: Kernel Suspects Partitioning", 1608 "RTM_REDIRECT: Told to use different route", 1609 "RTM_MISS: Lookup failed on this address", 1610 "RTM_LOCK: fix specified metrics", 1611 "RTM_OLDADD: caused by SIOCADDRT", 1612 "RTM_OLDDEL: caused by SIOCDELRT", 1613 "RTM_RESOLVE: Route created by cloning", 1614 "RTM_NEWADDR: address being added to iface", 1615 "RTM_DELADDR: address being removed from iface", 1616 "RTM_OIFINFO: iface status change (pre-1.5)", 1617 "RTM_IFINFO: iface status change", 1618 "RTM_IFANNOUNCE: iface arrival/departure", 1619 0, 1620 }; 1621 1622 char metricnames[] = 1623 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 1624 char routeflags[] = 1625 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016CLONED\017PROTO2\020PROTO1"; 1626 char ifnetflags[] = 1627 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST"; 1628 char addrnames[] = 1629 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1630 1631 static void 1632 print_rtmsg(rtm, msglen) 1633 struct rt_msghdr *rtm; 1634 int msglen; 1635 { 1636 struct if_msghdr *ifm; 1637 struct ifa_msghdr *ifam; 1638 struct if_announcemsghdr *ifan; 1639 1640 if (verbose == 0) 1641 return; 1642 if (rtm->rtm_version != RTM_VERSION) { 1643 (void) printf("routing message version %d not understood\n", 1644 rtm->rtm_version); 1645 return; 1646 } 1647 if (msgtypes[rtm->rtm_type]) 1648 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1649 else 1650 (void)printf("#%d: ", rtm->rtm_type); 1651 (void)printf("len %d, ", rtm->rtm_msglen); 1652 switch (rtm->rtm_type) { 1653 case RTM_IFINFO: 1654 ifm = (struct if_msghdr *)rtm; 1655 (void) printf("if# %d, flags:", ifm->ifm_index); 1656 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1657 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1658 break; 1659 case RTM_NEWADDR: 1660 case RTM_DELADDR: 1661 ifam = (struct ifa_msghdr *)rtm; 1662 (void) printf("metric %d, flags:", ifam->ifam_metric); 1663 bprintf(stdout, ifam->ifam_flags, routeflags); 1664 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1665 break; 1666 case RTM_IFANNOUNCE: 1667 ifan = (struct if_announcemsghdr *)rtm; 1668 (void) printf("if# %d, what: ", ifan->ifan_index); 1669 switch (ifan->ifan_what) { 1670 case IFAN_ARRIVAL: 1671 printf("arrival"); 1672 break; 1673 case IFAN_DEPARTURE: 1674 printf("departure"); 1675 break; 1676 default: 1677 printf("#%d", ifan->ifan_what); 1678 break; 1679 } 1680 printf("\n"); 1681 break; 1682 default: 1683 (void) printf("pid: %d, seq %d, errno %d, flags:", 1684 rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1685 bprintf(stdout, rtm->rtm_flags, routeflags); 1686 pmsg_common(rtm); 1687 } 1688 } 1689 1690 #ifndef SMALL 1691 static void 1692 print_getmsg(rtm, msglen) 1693 struct rt_msghdr *rtm; 1694 int msglen; 1695 { 1696 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL, *ifa = NULL; 1697 struct sockaddr_dl *ifp = NULL; 1698 struct sockaddr *sa; 1699 char *cp; 1700 int i; 1701 1702 if (! shortoutput) 1703 (void) printf(" route to: %s\n", 1704 routename((struct sockaddr *) &so_dst, NULL, RTF_HOST)); 1705 if (rtm->rtm_version != RTM_VERSION) { 1706 warnx("routing message version %d not understood", 1707 rtm->rtm_version); 1708 return; 1709 } 1710 if (rtm->rtm_msglen > msglen) { 1711 warnx("message length mismatch, in packet %d, returned %d\n", 1712 rtm->rtm_msglen, msglen); 1713 } 1714 if (rtm->rtm_errno) { 1715 warn("RTM_GET"); 1716 return; 1717 } 1718 cp = ((char *)(rtm + 1)); 1719 if (rtm->rtm_addrs) 1720 for (i = 1; i; i <<= 1) 1721 if (i & rtm->rtm_addrs) { 1722 sa = (struct sockaddr *)cp; 1723 switch (i) { 1724 case RTA_DST: 1725 dst = sa; 1726 break; 1727 case RTA_GATEWAY: 1728 gate = sa; 1729 break; 1730 case RTA_NETMASK: 1731 mask = sa; 1732 break; 1733 case RTA_IFP: 1734 if (sa->sa_family == AF_LINK && 1735 ((struct sockaddr_dl *)sa)->sdl_nlen) 1736 ifp = (struct sockaddr_dl *)sa; 1737 break; 1738 case RTA_IFA: 1739 ifa = sa; 1740 break; 1741 } 1742 ADVANCE(cp, sa); 1743 } 1744 if (dst && mask) 1745 mask->sa_family = dst->sa_family; /* XXX */ 1746 if (dst && ! shortoutput) 1747 (void)printf("destination: %s\n", 1748 routename(dst, mask, RTF_HOST)); 1749 if (mask && ! shortoutput) { 1750 int savenflag = nflag; 1751 1752 nflag = 1; 1753 (void)printf(" mask: %s\n", 1754 routename(mask, NULL, RTF_HOST)); 1755 nflag = savenflag; 1756 } 1757 if (gate && rtm->rtm_flags & RTF_GATEWAY && ! shortoutput) 1758 (void)printf(" gateway: %s\n", 1759 routename(gate, NULL, RTF_HOST)); 1760 if (ifa && ! shortoutput) 1761 (void)printf(" local addr: %s\n", 1762 routename(ifa, NULL, RTF_HOST)); 1763 if (ifp && ! shortoutput) 1764 (void)printf(" interface: %.*s\n", 1765 ifp->sdl_nlen, ifp->sdl_data); 1766 if (! shortoutput) { 1767 (void)printf(" flags: "); 1768 bprintf(stdout, rtm->rtm_flags, routeflags); 1769 } 1770 1771 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1772 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1773 1774 if (! shortoutput) { 1775 (void) printf("\n%s\n", "\ 1776 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1777 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1778 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1779 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1780 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1781 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1782 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1783 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1784 if (rtm->rtm_rmx.rmx_expire) 1785 rtm->rtm_rmx.rmx_expire -= time(0); 1786 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1787 } 1788 #undef lock 1789 #undef msec 1790 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1791 1792 if ((rtm->rtm_addrs & RTF_GATEWAY) == 0) 1793 rv = 1; 1794 else { 1795 char *cp, *name; 1796 int addrs, i; 1797 struct sockaddr *sa; 1798 1799 cp = (char *)(rtm + 1); 1800 addrs = rtm->rtm_addrs; 1801 1802 for (i = 1; i; i <<= 1) { 1803 sa = (struct sockaddr *)cp; 1804 if (i == RTF_GATEWAY) { 1805 name = routename(sa, NULL, RTF_HOST); 1806 if (name[0] == '\0') 1807 rv = 1; 1808 else if (shortoutput) 1809 printf("%s\n", name); 1810 } 1811 if (i & addrs) 1812 ADVANCE(cp, sa); 1813 } 1814 } 1815 1816 if (shortoutput) 1817 return; 1818 else if (verbose) 1819 pmsg_common(rtm); 1820 else if (rtm->rtm_addrs &~ RTA_IGN) { 1821 (void) printf("sockaddrs: "); 1822 bprintf(stdout, rtm->rtm_addrs, addrnames); 1823 putchar('\n'); 1824 } 1825 #undef RTA_IGN 1826 } 1827 #endif /* SMALL */ 1828 1829 void 1830 pmsg_common(rtm) 1831 struct rt_msghdr *rtm; 1832 { 1833 (void) printf("\nlocks: "); 1834 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1835 (void) printf(" inits: "); 1836 bprintf(stdout, rtm->rtm_inits, metricnames); 1837 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1838 } 1839 1840 static void 1841 pmsg_addrs(cp, addrs) 1842 char *cp; 1843 int addrs; 1844 { 1845 struct sockaddr *sa; 1846 int i; 1847 1848 if (addrs != 0) { 1849 (void) printf("\nsockaddrs: "); 1850 bprintf(stdout, addrs, addrnames); 1851 (void) putchar('\n'); 1852 for (i = 1; i; i <<= 1) 1853 if (i & addrs) { 1854 sa = (struct sockaddr *)cp; 1855 (void) printf(" %s", 1856 routename(sa, NULL, RTF_HOST)); 1857 ADVANCE(cp, sa); 1858 } 1859 } 1860 (void) putchar('\n'); 1861 (void) fflush(stdout); 1862 } 1863 1864 static void 1865 bprintf(fp, b, s) 1866 FILE *fp; 1867 int b; 1868 u_char *s; 1869 { 1870 int i; 1871 int gotsome = 0; 1872 1873 if (b == 0) 1874 return; 1875 while ((i = *s++) != 0) { 1876 if (b & (1 << (i-1))) { 1877 if (gotsome == 0) 1878 i = '<'; 1879 else 1880 i = ','; 1881 (void) putc(i, fp); 1882 gotsome = 1; 1883 for (; (i = *s) > 32; s++) 1884 (void) putc(i, fp); 1885 } else 1886 while (*s > 32) 1887 s++; 1888 } 1889 if (gotsome) 1890 (void) putc('>', fp); 1891 } 1892 1893 static int 1894 keyword(cp) 1895 char *cp; 1896 { 1897 struct keytab *kt = keywords; 1898 1899 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1900 kt++; 1901 return kt->kt_i; 1902 } 1903 1904 static void 1905 sodump(su, which) 1906 sup su; 1907 char *which; 1908 { 1909 #ifdef INET6 1910 char ntop_buf[NI_MAXHOST]; 1911 #endif 1912 1913 switch (su->sa.sa_family) { 1914 case AF_INET: 1915 (void) printf("%s: inet %s; ", 1916 which, inet_ntoa(su->sin.sin_addr)); 1917 break; 1918 case AF_APPLETALK: 1919 (void) printf("%s: atalk %d.%d; ", 1920 which, su->sat.sat_addr.s_net, su->sat.sat_addr.s_node); 1921 break; 1922 case AF_LINK: 1923 (void) printf("%s: link %s; ", 1924 which, link_ntoa(&su->sdl)); 1925 break; 1926 #ifndef SMALL 1927 #ifdef INET6 1928 case AF_INET6: 1929 (void) printf("%s: inet6 %s; ", 1930 which, inet_ntop(AF_INET6, &su->sin6.sin6_addr, 1931 ntop_buf, sizeof(ntop_buf))); 1932 break; 1933 #endif 1934 case AF_ISO: 1935 (void) printf("%s: iso %s; ", 1936 which, iso_ntoa(&su->siso.siso_addr)); 1937 break; 1938 case AF_NS: 1939 (void) printf("%s: xns %s; ", 1940 which, ns_ntoa(su->sns.sns_addr)); 1941 break; 1942 #endif /* SMALL */ 1943 default: 1944 (void) printf("af %p: %s; ", 1945 which, any_ntoa(&su->sa)); 1946 } 1947 (void) fflush(stdout); 1948 } 1949 1950 /* States*/ 1951 #define VIRGIN 0 1952 #define GOTONE 1 1953 #define GOTTWO 2 1954 /* Inputs */ 1955 #define DIGIT (4*0) 1956 #define END (4*1) 1957 #define DELIM (4*2) 1958 1959 static void 1960 sockaddr(addr, sa) 1961 char *addr; 1962 struct sockaddr *sa; 1963 { 1964 char *cp = (char *)sa; 1965 int size = sa->sa_len; 1966 char *cplim = cp + size; 1967 int byte = 0, state = VIRGIN, new = 0; 1968 1969 (void) memset(cp, 0, size); 1970 cp++; 1971 do { 1972 if ((*addr >= '0') && (*addr <= '9')) { 1973 new = *addr - '0'; 1974 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1975 new = *addr - 'a' + 10; 1976 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1977 new = *addr - 'A' + 10; 1978 } else if (*addr == 0) 1979 state |= END; 1980 else 1981 state |= DELIM; 1982 addr++; 1983 switch (state /* | INPUT */) { 1984 case GOTTWO | DIGIT: 1985 *cp++ = byte; /*FALLTHROUGH*/ 1986 case VIRGIN | DIGIT: 1987 state = GOTONE; byte = new; continue; 1988 case GOTONE | DIGIT: 1989 state = GOTTWO; byte = new + (byte << 4); continue; 1990 default: /* | DELIM */ 1991 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1992 case GOTONE | END: 1993 case GOTTWO | END: 1994 *cp++ = byte; /* FALLTHROUGH */ 1995 case VIRGIN | END: 1996 break; 1997 } 1998 break; 1999 } while (cp < cplim); 2000 sa->sa_len = cp - (char *)sa; 2001 } 2002
Indexes created Tue Sep 30 20:09:53 GMT 2025