route.c revision 1.49
1 /* $NetBSD: route.c,v 1.49 2001/10/24 16:05:06 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 1.49 2001/10/24 16:05:06 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; 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 [ -fnqv ] 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, "fnqvdt")) != -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 '?': 186 default: 187 usage(NULL); 188 } 189 argc -= optind; 190 argv += optind; 191 192 pid = getpid(); 193 if (tflag) 194 s = open("/dev/null", O_WRONLY, 0); 195 else 196 s = socket(PF_ROUTE, SOCK_RAW, 0); 197 if (s < 0) 198 err(1, "socket"); 199 200 if (*argv == NULL) { 201 if (doflush) 202 ch = K_FLUSH; 203 else 204 goto no_cmd; 205 } else 206 ch = keyword(*argv); 207 208 switch (ch) { 209 210 #ifndef SMALL 211 case K_GET: 212 #endif /* SMALL */ 213 case K_CHANGE: 214 case K_ADD: 215 case K_DELETE: 216 if (doflush) 217 flushroutes(1, argv); 218 newroute(argc, argv); 219 break; 220 221 case K_SHOW: 222 show(argc, argv); 223 break; 224 225 #ifndef SMALL 226 case K_MONITOR: 227 monitor(); 228 break; 229 230 #endif /* SMALL */ 231 case K_FLUSH: 232 flushroutes(argc, argv); 233 break; 234 235 no_cmd: 236 default: 237 usage(*argv); 238 return 1; 239 } 240 return 0; 241 } 242 243 /* 244 * Purge all entries in the routing tables not 245 * associated with network interfaces. 246 */ 247 static void 248 flushroutes(argc, argv) 249 int argc; 250 char *argv[]; 251 { 252 size_t needed; 253 int mib[6], rlen, seqno; 254 char *buf, *next, *lim; 255 struct rt_msghdr *rtm; 256 257 af = 0; 258 shutdown(s, 0); /* Don't want to read back our messages */ 259 if (argc > 1) { 260 argv++; 261 if (argc == 2 && **argv == '-') 262 switch (keyword(*argv + 1)) { 263 case K_INET: 264 af = AF_INET; 265 break; 266 #ifdef INET6 267 case K_INET6: 268 af = AF_INET6; 269 break; 270 #endif 271 case K_ATALK: 272 af = AF_APPLETALK; 273 break; 274 #ifndef SMALL 275 case K_XNS: 276 af = AF_NS; 277 break; 278 #endif /* SMALL */ 279 case K_LINK: 280 af = AF_LINK; 281 break; 282 #ifndef SMALL 283 case K_ISO: 284 case K_OSI: 285 af = AF_ISO; 286 break; 287 case K_X25: 288 af = AF_CCITT; 289 #endif /* SMALL */ 290 default: 291 goto bad; 292 } else 293 bad: usage(*argv); 294 } 295 mib[0] = CTL_NET; 296 mib[1] = PF_ROUTE; 297 mib[2] = 0; /* protocol */ 298 mib[3] = 0; /* wildcard address family */ 299 mib[4] = NET_RT_DUMP; 300 mib[5] = 0; /* no flags */ 301 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 302 err(1, "route-sysctl-estimate"); 303 if (needed == 0) 304 return; 305 if ((buf = malloc(needed)) == NULL) 306 err(1, "malloc"); 307 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 308 err(1, "actual retrieval of routing table"); 309 lim = buf + needed; 310 if (verbose) { 311 (void) printf("Examining routing table from sysctl\n"); 312 if (af) printf("(address family %s)\n", (*argv + 1)); 313 } 314 seqno = 0; /* ??? */ 315 for (next = buf; next < lim; next += rtm->rtm_msglen) { 316 rtm = (struct rt_msghdr *)next; 317 if (verbose) 318 print_rtmsg(rtm, rtm->rtm_msglen); 319 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 320 continue; 321 if (af) { 322 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 323 324 if (sa->sa_family != af) 325 continue; 326 } 327 if (debugonly) 328 continue; 329 rtm->rtm_type = RTM_DELETE; 330 rtm->rtm_seq = seqno; 331 rlen = write(s, next, rtm->rtm_msglen); 332 if (rlen < (int)rtm->rtm_msglen) { 333 warn("write to routing socket, got %d for rlen", rlen); 334 break; 335 } 336 seqno++; 337 if (qflag) 338 continue; 339 if (verbose) 340 print_rtmsg(rtm, rlen); 341 else { 342 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 343 (void) printf("%-20.20s ", 344 routename(sa, NULL, rtm->rtm_flags)); 345 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 346 (void) printf("%-20.20s ", 347 routename(sa, NULL, RTF_HOST)); 348 (void) printf("done\n"); 349 } 350 } 351 } 352 353 354 static char hexlist[] = "0123456789abcdef"; 355 356 static char * 357 any_ntoa(sa) 358 const struct sockaddr *sa; 359 { 360 static char obuf[64]; 361 const char *in; 362 char *out; 363 int len; 364 365 len = sa->sa_len; 366 in = sa->sa_data; 367 out = obuf; 368 369 do { 370 *out++ = hexlist[(*in >> 4) & 15]; 371 *out++ = hexlist[(*in++) & 15]; 372 *out++ = '.'; 373 } while (--len > 0); 374 out[-1] = '\0'; 375 return obuf; 376 } 377 378 379 int 380 netmask_length(nm, af) 381 struct sockaddr *nm; 382 int af; 383 { 384 static int 385 /* number of bits in a nibble */ 386 _t[] = { 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4 }, 387 /* good nibbles are 1111, 1110, 1100, 1000, 0000 */ 388 _g[] = { 1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,1 }; 389 int mask, good, zeroes, maskbytes, bit, i; 390 unsigned char *maskdata; 391 392 if (nm == NULL) 393 return 0; 394 395 mask = 0; 396 good = 1; 397 zeroes = 0; 398 399 switch (af) { 400 case AF_INET: { 401 struct sockaddr_in *sin = (struct sockaddr_in *)nm; 402 maskdata = (unsigned char *) &sin->sin_addr; 403 maskbytes = sin->sin_len - 404 ((caddr_t)&sin->sin_addr - (caddr_t)sin); 405 break; 406 } 407 case AF_INET6: { 408 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nm; 409 maskdata = (unsigned char *) &sin6->sin6_addr; 410 maskbytes = sin6->sin6_len - 411 ((caddr_t)&sin6->sin6_addr - (caddr_t)sin6); 412 break; 413 } 414 default: 415 return 0; 416 } 417 418 /* 419 * Count the bits in the nibbles of the mask, and marking the 420 * netmask as not good (or at best, non-standard and very 421 * discouraged, in the case of AF_INET) if we find either of 422 * a nibble with non-contiguous bits, or a non-zero nibble 423 * after we've found a zero nibble. 424 */ 425 for (i = 0; i < maskbytes; i++) { 426 /* high nibble */ 427 mask += bit = _t[maskdata[i] >> 4]; 428 good &= _g[maskdata[i] >> 4]; 429 if (zeroes && bit) 430 good = 0; 431 if (bit == 0) 432 zeroes = 1; 433 /* low nibble */ 434 mask += bit = _t[maskdata[i] & 0xf]; 435 good &= _g[maskdata[i] & 0xf]; 436 if (zeroes && bit) 437 good = 0; 438 if (bit == 0) 439 zeroes = 1; 440 } 441 442 /* 443 * Always return the number of bits found, but as a negative 444 * if the mask wasn't one we like. 445 */ 446 return good ? mask : -mask; 447 } 448 449 char * 450 netmask_string(mask, len) 451 struct sockaddr *mask; 452 int len; 453 { 454 static char smask[16]; 455 456 if (len >= 0) 457 snprintf(smask, sizeof(smask), "%d", len); 458 else { 459 /* XXX AF_INET only?! */ 460 struct sockaddr_in sin; 461 462 memset(&sin, 0, sizeof(sin)); 463 memcpy(&sin, mask, mask->sa_len); 464 snprintf(smask, sizeof(smask), "%s", inet_ntoa(sin.sin_addr)); 465 } 466 467 return smask; 468 } 469 470 471 char * 472 routename(sa, nm, flags) 473 struct sockaddr *sa, *nm; 474 int flags; 475 { 476 char *cp; 477 static char line[50]; 478 struct hostent *hp; 479 static char domain[MAXHOSTNAMELEN + 1]; 480 static int first = 1; 481 struct in_addr in; 482 int nml; 483 484 if ((flags & RTF_HOST) == 0) 485 return netname(sa, nm); 486 487 if (first) { 488 first = 0; 489 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 490 (cp = strchr(domain, '.'))) { 491 (void)strncpy(domain, cp + 1, sizeof(domain) - 1); 492 domain[sizeof(domain) - 1] = '\0'; 493 } else 494 domain[0] = 0; 495 } 496 497 if (sa->sa_len == 0) { 498 strncpy(line, "default", sizeof(line) - 1); 499 line[sizeof(line) - 1] = '\0'; 500 } else switch (sa->sa_family) { 501 502 case AF_INET: 503 in = ((struct sockaddr_in *)sa)->sin_addr; 504 nml = netmask_length(nm, AF_INET); 505 506 cp = 0; 507 if (in.s_addr == INADDR_ANY || sa->sa_len < 4) { 508 if (nml == 0) 509 cp = "default"; 510 else { 511 static char notdefault[sizeof(NOTDEFSTRING)]; 512 513 snprintf(notdefault, sizeof(notdefault), 514 "0.0.0.0/%s", netmask_string(nm, nml)); 515 cp = notdefault; 516 } 517 } 518 if (cp == 0 && !nflag) { 519 hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), 520 AF_INET); 521 if (hp) { 522 if ((cp = strchr(hp->h_name, '.')) && 523 !strcmp(cp + 1, domain)) 524 *cp = 0; 525 cp = hp->h_name; 526 } 527 } 528 if (cp) 529 (void)strncpy(line, cp, sizeof(line) - 1); 530 else 531 (void)strncpy(line, inet_ntoa(in), sizeof(line) - 1); 532 line[sizeof(line) - 1] = '\0'; 533 break; 534 535 case AF_LINK: 536 return (link_ntoa((struct sockaddr_dl *)sa)); 537 538 #ifndef SMALL 539 #ifdef INET6 540 case AF_INET6: 541 { 542 struct sockaddr_in6 sin6; 543 int niflags; 544 545 #ifdef NI_WITHSCOPEID 546 niflags = NI_WITHSCOPEID; 547 #else 548 niflags = 0; 549 #endif 550 if (nflag) 551 niflags |= NI_NUMERICHOST; 552 memset(&sin6, 0, sizeof(sin6)); 553 memcpy(&sin6, sa, sa->sa_len); 554 sin6.sin6_len = sizeof(struct sockaddr_in6); 555 sin6.sin6_family = AF_INET6; 556 #ifdef __KAME__ 557 if (sa->sa_len == sizeof(struct sockaddr_in6) && 558 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 559 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 560 sin6.sin6_scope_id == 0) { 561 sin6.sin6_scope_id = 562 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 563 sin6.sin6_addr.s6_addr[2] = 0; 564 sin6.sin6_addr.s6_addr[3] = 0; 565 } 566 #endif 567 nml = netmask_length(nm, AF_INET6); 568 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 569 if (nml == 0) { 570 strncpy(line, "::", sizeof(line) - 1); 571 line[sizeof(line) - 1] = '\0'; 572 } 573 else 574 /* noncontiguous never happens in ipv6 */ 575 snprintf(line, sizeof(line), "::/%d", nml); 576 } 577 578 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 579 line, sizeof(line), NULL, 0, niflags) != 0) 580 strncpy(line, "invalid", sizeof(line)); 581 break; 582 } 583 #endif 584 585 case AF_NS: 586 return (ns_print((struct sockaddr_ns *)sa)); 587 588 case AF_ISO: 589 (void)snprintf(line, sizeof line, "iso %s", 590 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 591 break; 592 #endif /* SMALL */ 593 594 case AF_APPLETALK: 595 (void) snprintf(line, sizeof(line), "atalk %d.%d", 596 ((struct sockaddr_at *)sa)->sat_addr.s_net, 597 ((struct sockaddr_at *)sa)->sat_addr.s_node); 598 break; 599 600 default: 601 (void)snprintf(line, sizeof line, "(%d) %s", 602 sa->sa_family, any_ntoa(sa)); 603 break; 604 605 } 606 return (line); 607 } 608 609 /* 610 * Return the name of the network whose address is given. 611 * The address is assumed to be that of a net or subnet, not a host. 612 */ 613 char * 614 netname(sa, nm) 615 struct sockaddr *sa, *nm; 616 { 617 char *cp = 0; 618 static char line[50]; 619 struct netent *np = 0; 620 u_int32_t net, mask; 621 u_int32_t i; 622 int subnetshift, nml; 623 struct in_addr in; 624 625 switch (sa->sa_family) { 626 627 case AF_INET: 628 in = ((struct sockaddr_in *)sa)->sin_addr; 629 i = ntohl(in.s_addr); 630 nml = netmask_length(nm, AF_INET); 631 if (i == 0) { 632 if (nml == 0) 633 cp = "default"; 634 else { 635 static char notdefault[sizeof(NOTDEFSTRING)]; 636 637 snprintf(notdefault, sizeof(notdefault), 638 "0.0.0.0/%s", netmask_string(nm, nml)); 639 cp = notdefault; 640 } 641 } 642 else if (!nflag) { 643 if (IN_CLASSA(i)) { 644 mask = IN_CLASSA_NET; 645 subnetshift = 8; 646 } else if (IN_CLASSB(i)) { 647 mask = IN_CLASSB_NET; 648 subnetshift = 8; 649 } else { 650 mask = IN_CLASSC_NET; 651 subnetshift = 4; 652 } 653 /* 654 * If there are more bits than the standard mask 655 * would suggest, subnets must be in use. 656 * Guess at the subnet mask, assuming reasonable 657 * width subnet fields. 658 */ 659 while (i &~ mask) 660 mask = (int32_t)mask >> subnetshift; 661 net = i & mask; 662 while ((mask & 1) == 0) 663 mask >>= 1, net >>= 1; 664 np = getnetbyaddr(net, AF_INET); 665 if (np) 666 cp = np->n_name; 667 } 668 if (cp) { 669 (void)strncpy(line, cp, sizeof(line) - 1); 670 line[sizeof(line) - 1] = '\0'; 671 } else { 672 #if 0 /* XXX - This is silly... */ 673 #define C(x) ((x) & 0xff) 674 if ((i & 0xffffff) == 0) 675 (void)snprintf(line, sizeof line, "%u", 676 C(i >> 24)); 677 else if ((i & 0xffff) == 0) 678 (void)snprintf(line, sizeof line, "%u.%u", 679 C(i >> 24), C(i >> 16)); 680 else if ((i & 0xff) == 0) 681 (void)snprintf(line, sizeof line, "%u.%u.%u", 682 C(i >> 24), C(i >> 16), C(i >> 8)); 683 else 684 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", 685 C(i >> 24), C(i >> 16), C(i >> 8), C(i)); 686 #undef C 687 #else /* XXX */ 688 (void)strncpy(line, inet_ntoa(in), sizeof(line) - 1); 689 #endif /* XXX */ 690 } 691 break; 692 693 case AF_LINK: 694 return (link_ntoa((struct sockaddr_dl *)sa)); 695 696 #ifndef SMALL 697 #ifdef INET6 698 case AF_INET6: 699 { 700 struct sockaddr_in6 sin6; 701 int niflags; 702 703 #ifdef NI_WITHSCOPEID 704 niflags = NI_WITHSCOPEID; 705 #else 706 niflags = 0; 707 #endif 708 if (nflag) 709 niflags |= NI_NUMERICHOST; 710 memset(&sin6, 0, sizeof(sin6)); 711 memcpy(&sin6, sa, sa->sa_len); 712 sin6.sin6_len = sizeof(struct sockaddr_in6); 713 sin6.sin6_family = AF_INET6; 714 #ifdef __KAME__ 715 if (sa->sa_len == sizeof(struct sockaddr_in6) && 716 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 717 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 718 sin6.sin6_scope_id == 0) { 719 sin6.sin6_scope_id = 720 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 721 sin6.sin6_addr.s6_addr[2] = 0; 722 sin6.sin6_addr.s6_addr[3] = 0; 723 } 724 #endif 725 nml = netmask_length(nm, AF_INET6); 726 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 727 if (nml == 0) { 728 strncpy(line, "::", sizeof(line) - 1); 729 line[sizeof(line) - 1] = '\0'; 730 } 731 else 732 /* noncontiguous never happens in ipv6 */ 733 snprintf(line, sizeof(line), "::/%d", nml); 734 } 735 736 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 737 line, sizeof(line), NULL, 0, niflags) != 0) 738 strncpy(line, "invalid", sizeof(line)); 739 break; 740 } 741 #endif 742 743 case AF_NS: 744 return (ns_print((struct sockaddr_ns *)sa)); 745 746 case AF_ISO: 747 (void)snprintf(line, sizeof line, "iso %s", 748 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 749 break; 750 #endif /* SMALL */ 751 752 case AF_APPLETALK: 753 (void) snprintf(line, sizeof(line), "atalk %d.%d", 754 ((struct sockaddr_at *)sa)->sat_addr.s_net, 755 ((struct sockaddr_at *)sa)->sat_addr.s_node); 756 break; 757 758 default: 759 (void)snprintf(line, sizeof line, "af %d: %s", 760 sa->sa_family, any_ntoa(sa)); 761 break; 762 } 763 return (line); 764 } 765 766 static void 767 set_metric(value, key) 768 char *value; 769 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 void 794 newroute(argc, argv) 795 int argc; 796 char **argv; 797 { 798 char *cmd, *dest = "", *gateway = ""; 799 const char *err; 800 int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC; 801 int key; 802 struct hostent *hp = 0; 803 804 cmd = argv[0]; 805 af = 0; 806 if (*cmd != 'g') 807 shutdown(s, 0); /* Don't want to read back our messages */ 808 while (--argc > 0) { 809 if (**(++argv)== '-') { 810 switch (key = keyword(1 + *argv)) { 811 812 case K_SA: 813 af = PF_ROUTE; 814 aflen = sizeof(union sockunion); 815 break; 816 817 case K_ATALK: 818 af = AF_APPLETALK; 819 aflen = sizeof(struct sockaddr_at); 820 break; 821 822 case K_INET: 823 af = AF_INET; 824 aflen = sizeof(struct sockaddr_in); 825 break; 826 827 #ifdef INET6 828 case K_INET6: 829 af = AF_INET6; 830 aflen = sizeof(struct sockaddr_in6); 831 break; 832 #endif 833 834 case K_LINK: 835 af = AF_LINK; 836 aflen = sizeof(struct sockaddr_dl); 837 break; 838 839 #ifndef SMALL 840 case K_OSI: 841 case K_ISO: 842 af = AF_ISO; 843 aflen = sizeof(struct sockaddr_iso); 844 break; 845 846 case K_X25: 847 af = AF_CCITT; 848 aflen = sizeof(struct sockaddr_x25); 849 break; 850 851 case K_XNS: 852 af = AF_NS; 853 aflen = sizeof(struct sockaddr_ns); 854 break; 855 #endif /* SMALL */ 856 857 case K_IFACE: 858 case K_INTERFACE: 859 iflag++; 860 break; 861 case K_NOSTATIC: 862 flags &= ~RTF_STATIC; 863 break; 864 case K_LLINFO: 865 flags |= RTF_LLINFO; 866 break; 867 case K_LOCK: 868 locking = 1; 869 break; 870 case K_LOCKREST: 871 lockrest = 1; 872 break; 873 case K_HOST: 874 forcehost++; 875 break; 876 case K_REJECT: 877 flags |= RTF_REJECT; 878 break; 879 case K_BLACKHOLE: 880 flags |= RTF_BLACKHOLE; 881 break; 882 case K_CLONED: 883 flags |= RTF_CLONED; 884 break; 885 case K_PROTO1: 886 flags |= RTF_PROTO1; 887 break; 888 case K_PROTO2: 889 flags |= RTF_PROTO2; 890 break; 891 case K_CLONING: 892 flags |= RTF_CLONING; 893 break; 894 case K_XRESOLVE: 895 flags |= RTF_XRESOLVE; 896 break; 897 case K_STATIC: 898 flags |= RTF_STATIC; 899 break; 900 case K_IFA: 901 if (!--argc) 902 usage(1+*argv); 903 (void) getaddr(RTA_IFA, *++argv, 0); 904 break; 905 case K_IFP: 906 if (!--argc) 907 usage(1+*argv); 908 (void) getaddr(RTA_IFP, *++argv, 0); 909 break; 910 case K_GENMASK: 911 if (!--argc) 912 usage(1+*argv); 913 (void) getaddr(RTA_GENMASK, *++argv, 0); 914 break; 915 case K_GATEWAY: 916 if (!--argc) 917 usage(1+*argv); 918 (void) getaddr(RTA_GATEWAY, *++argv, 0); 919 break; 920 case K_DST: 921 if (!--argc) 922 usage(1+*argv); 923 ishost = getaddr(RTA_DST, *++argv, &hp); 924 dest = *argv; 925 break; 926 case K_NETMASK: 927 if (!--argc) 928 usage(1+*argv); 929 (void) getaddr(RTA_NETMASK, *++argv, 0); 930 /* FALLTHROUGH */ 931 case K_NET: 932 forcenet++; 933 break; 934 case K_PREFIXLEN: 935 argc--; 936 if (prefixlen(*++argv) == 128) { 937 forcenet = 0; 938 ishost = 1; 939 } else { 940 forcenet = 1; 941 ishost = 0; 942 } 943 break; 944 case K_MTU: 945 case K_HOPCOUNT: 946 case K_EXPIRE: 947 case K_RECVPIPE: 948 case K_SENDPIPE: 949 case K_SSTHRESH: 950 case K_RTT: 951 case K_RTTVAR: 952 if (!--argc) 953 usage(1+*argv); 954 set_metric(*++argv, key); 955 break; 956 default: 957 usage(1+*argv); 958 } 959 } else { 960 if ((rtm_addrs & RTA_DST) == 0) { 961 dest = *argv; 962 ishost = getaddr(RTA_DST, *argv, &hp); 963 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 964 gateway = *argv; 965 (void) getaddr(RTA_GATEWAY, *argv, &hp); 966 } else { 967 int ret = atoi(*argv); 968 969 if (ret == 0) { 970 if (!qflag && strcmp(*argv, "0") == 0) 971 warnx("%s, %s", 972 "old usage of trailing 0", 973 "assuming route to if"); 974 else 975 usage((char *)NULL); 976 iflag = 1; 977 continue; 978 } else if (ret > 0 && ret < 10) { 979 if (!qflag) { 980 warnx("%s, %s", 981 "old usage of trailing digit", 982 "assuming route via gateway"); 983 } 984 iflag = 0; 985 continue; 986 } 987 (void) getaddr(RTA_NETMASK, *argv, 0); 988 } 989 } 990 } 991 if (forcehost) 992 ishost = 1; 993 if (forcenet) 994 ishost = 0; 995 flags |= RTF_UP; 996 if (ishost) 997 flags |= RTF_HOST; 998 if (iflag == 0) 999 flags |= RTF_GATEWAY; 1000 for (attempts = 1; ; attempts++) { 1001 errno = 0; 1002 if ((ret = rtmsg(*cmd, flags)) == 0) 1003 break; 1004 if (errno != ENETUNREACH && errno != ESRCH) 1005 break; 1006 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 1007 hp->h_addr_list++; 1008 memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0], 1009 hp->h_length); 1010 } else 1011 break; 1012 } 1013 if (*cmd == 'g') 1014 exit(0); 1015 oerrno = errno; 1016 if (!qflag) { 1017 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 1018 if (*gateway) { 1019 (void) printf(": gateway %s", gateway); 1020 if (attempts > 1 && ret == 0 && af == AF_INET) 1021 (void) printf(" (%s)", 1022 inet_ntoa(so_gate.sin.sin_addr)); 1023 } 1024 if (ret == 0) 1025 (void) printf("\n"); 1026 } 1027 if (ret != 0) { 1028 switch (oerrno) { 1029 case ESRCH: 1030 err = "not in table"; 1031 break; 1032 case EBUSY: 1033 err = "entry in use"; 1034 break; 1035 case ENOBUFS: 1036 err = "routing table overflow"; 1037 break; 1038 default: 1039 err = strerror(oerrno); 1040 break; 1041 } 1042 (void) printf(": %s\n", err); 1043 } 1044 } 1045 1046 static void 1047 inet_makenetandmask(net, sin) 1048 u_int32_t net; 1049 struct sockaddr_in *sin; 1050 { 1051 u_int32_t addr, mask = 0; 1052 char *cp; 1053 1054 rtm_addrs |= RTA_NETMASK; 1055 if (net == 0) 1056 mask = addr = 0; 1057 else if (net < 128) { 1058 addr = net << IN_CLASSA_NSHIFT; 1059 mask = IN_CLASSA_NET; 1060 } else if (net < 65536) { 1061 addr = net << IN_CLASSB_NSHIFT; 1062 mask = IN_CLASSB_NET; 1063 } else if (net < 16777216L) { 1064 addr = net << IN_CLASSC_NSHIFT; 1065 mask = IN_CLASSC_NET; 1066 } else { 1067 addr = net; 1068 if ((addr & IN_CLASSA_HOST) == 0) 1069 mask = IN_CLASSA_NET; 1070 else if ((addr & IN_CLASSB_HOST) == 0) 1071 mask = IN_CLASSB_NET; 1072 else if ((addr & IN_CLASSC_HOST) == 0) 1073 mask = IN_CLASSC_NET; 1074 else 1075 mask = -1; 1076 } 1077 sin->sin_addr.s_addr = htonl(addr); 1078 sin = &so_mask.sin; 1079 sin->sin_addr.s_addr = htonl(mask); 1080 sin->sin_len = 0; 1081 sin->sin_family = 0; 1082 cp = (char *)(&sin->sin_addr + 1); 1083 while (*--cp == 0 && cp > (char *)sin) 1084 ; 1085 sin->sin_len = 1 + cp - (char *)sin; 1086 } 1087 1088 #ifdef INET6 1089 /* 1090 * XXX the function may need more improvement... 1091 */ 1092 static void 1093 inet6_makenetandmask(sin6) 1094 struct sockaddr_in6 *sin6; 1095 { 1096 char *plen; 1097 struct in6_addr in6; 1098 1099 plen = NULL; 1100 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1101 sin6->sin6_scope_id == 0) { 1102 plen = "0"; 1103 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1104 /* aggregatable global unicast - RFC2374 */ 1105 memset(&in6, 0, sizeof(in6)); 1106 if (!memcmp(&sin6->sin6_addr.s6_addr[8], &in6.s6_addr[8], 8)) 1107 plen = "64"; 1108 else 1109 plen = "128"; 1110 } 1111 1112 if (plen) { 1113 rtm_addrs |= RTA_NETMASK; 1114 prefixlen(plen); 1115 } 1116 } 1117 #endif 1118 1119 /* 1120 * Interpret an argument as a network address of some kind, 1121 * returning 1 if a host address, 0 if a network address. 1122 */ 1123 static int 1124 getaddr(which, s, hpp) 1125 int which; 1126 char *s; 1127 struct hostent **hpp; 1128 { 1129 sup su; 1130 struct hostent *hp; 1131 struct netent *np; 1132 u_int32_t val; 1133 char *t; 1134 int afamily; /* local copy of af so we can change it */ 1135 1136 if (af == 0) { 1137 af = AF_INET; 1138 aflen = sizeof(struct sockaddr_in); 1139 } 1140 afamily = af; 1141 rtm_addrs |= which; 1142 switch (which) { 1143 case RTA_DST: 1144 su = &so_dst; 1145 break; 1146 case RTA_GATEWAY: 1147 su = &so_gate; 1148 break; 1149 case RTA_NETMASK: 1150 su = &so_mask; 1151 break; 1152 case RTA_GENMASK: 1153 su = &so_genmask; 1154 break; 1155 case RTA_IFP: 1156 su = &so_ifp; 1157 afamily = AF_LINK; 1158 break; 1159 case RTA_IFA: 1160 su = &so_ifa; 1161 su->sa.sa_family = af; 1162 break; 1163 default: 1164 su = NULL; 1165 usage("Internal Error"); 1166 /*NOTREACHED*/ 1167 } 1168 su->sa.sa_len = aflen; 1169 su->sa.sa_family = afamily; /* cases that don't want it have left already */ 1170 if (strcmp(s, "default") == 0) { 1171 switch (which) { 1172 case RTA_DST: 1173 forcenet++; 1174 (void) getaddr(RTA_NETMASK, s, 0); 1175 break; 1176 case RTA_NETMASK: 1177 case RTA_GENMASK: 1178 su->sa.sa_len = 0; 1179 } 1180 return (0); 1181 } 1182 switch (afamily) { 1183 #ifndef SMALL 1184 #ifdef INET6 1185 case AF_INET6: 1186 { 1187 struct addrinfo hints, *res; 1188 1189 memset(&hints, 0, sizeof(hints)); 1190 hints.ai_family = afamily; /*AF_INET6*/ 1191 hints.ai_flags = AI_NUMERICHOST; 1192 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1193 if (getaddrinfo(s, "0", &hints, &res) != 0 || 1194 res->ai_family != AF_INET6 || 1195 res->ai_addrlen != sizeof(su->sin6)) { 1196 (void) fprintf(stderr, "%s: bad value\n", s); 1197 exit(1); 1198 } 1199 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1200 #ifdef __KAME__ 1201 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 1202 IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) && 1203 su->sin6.sin6_scope_id) { 1204 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 1205 htons(su->sin6.sin6_scope_id); 1206 su->sin6.sin6_scope_id = 0; 1207 } 1208 #endif 1209 if (which == RTA_DST) 1210 inet6_makenetandmask(&su->sin6); 1211 freeaddrinfo(res); 1212 return 0; 1213 } 1214 #endif 1215 1216 case AF_NS: 1217 if (which == RTA_DST) { 1218 struct sockaddr_ns *sms = &(so_mask.sns); 1219 memset(sms, 0, sizeof(*sms)); 1220 sms->sns_family = 0; 1221 sms->sns_len = 6; 1222 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 1223 rtm_addrs |= RTA_NETMASK; 1224 } 1225 su->sns.sns_addr = ns_addr(s); 1226 return (!ns_nullhost(su->sns.sns_addr)); 1227 1228 case AF_OSI: 1229 su->siso.siso_addr = *iso_addr(s); 1230 if (which == RTA_NETMASK || which == RTA_GENMASK) { 1231 char *cp = (char *)TSEL(&su->siso); 1232 su->siso.siso_nlen = 0; 1233 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 1234 su->siso.siso_len = 1 + cp - (char *)su; 1235 } 1236 return (1); 1237 1238 case AF_CCITT: 1239 ccitt_addr(s, &su->sx25); 1240 return (which == RTA_DST ? x25_makemask() : 1); 1241 #endif /* SMALL */ 1242 1243 case PF_ROUTE: 1244 su->sa.sa_len = sizeof(*su); 1245 sockaddr(s, &su->sa); 1246 return (1); 1247 1248 case AF_APPLETALK: 1249 t = strchr (s, '.'); 1250 if (!t) { 1251 badataddr: 1252 errx(1, "bad address: %s", s); 1253 } 1254 val = atoi (s); 1255 if (val > 65535) 1256 goto badataddr; 1257 su->sat.sat_addr.s_net = val; 1258 val = atoi (t); 1259 if (val > 256) 1260 goto badataddr; 1261 su->sat.sat_addr.s_node = val; 1262 rtm_addrs |= RTA_NETMASK; 1263 return(forcehost || su->sat.sat_addr.s_node != 0); 1264 1265 case AF_LINK: 1266 link_addr(s, &su->sdl); 1267 return (1); 1268 1269 case AF_INET: 1270 default: 1271 break; 1272 } 1273 1274 if (hpp == NULL) 1275 hpp = &hp; 1276 *hpp = NULL; 1277 if (((val = inet_addr(s)) != INADDR_NONE) && 1278 (which != RTA_DST || forcenet == 0)) { 1279 su->sin.sin_addr.s_addr = val; 1280 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1281 return (1); 1282 else { 1283 val = ntohl(val); 1284 goto netdone; 1285 } 1286 } 1287 if ((val = inet_network(s)) != INADDR_NONE || 1288 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) { 1289 netdone: 1290 if (which == RTA_DST) 1291 inet_makenetandmask(val, &su->sin); 1292 return (0); 1293 } 1294 hp = gethostbyname(s); 1295 if (hp) { 1296 *hpp = hp; 1297 su->sin.sin_family = hp->h_addrtype; 1298 memmove(&su->sin.sin_addr, hp->h_addr, hp->h_length); 1299 return (1); 1300 } 1301 errx(1, "bad value: %s", s); 1302 } 1303 1304 int 1305 prefixlen(s) 1306 char *s; 1307 { 1308 int len = atoi(s), q, r; 1309 int max; 1310 1311 switch (af) { 1312 case AF_INET: 1313 max = sizeof(struct in_addr) * 8; 1314 break; 1315 #ifdef INET6 1316 case AF_INET6: 1317 max = sizeof(struct in6_addr) * 8; 1318 break; 1319 #endif 1320 default: 1321 (void) fprintf(stderr, 1322 "prefixlen is not supported with af %d\n", af); 1323 exit(1); 1324 } 1325 1326 rtm_addrs |= RTA_NETMASK; 1327 if (len < -1 || len > max) { 1328 (void) fprintf(stderr, "%s: bad value\n", s); 1329 exit(1); 1330 } 1331 1332 q = len >> 3; 1333 r = len & 7; 1334 switch (af) { 1335 case AF_INET: 1336 memset(&so_mask, 0, sizeof(so_mask)); 1337 so_mask.sin.sin_family = AF_INET; 1338 so_mask.sin.sin_len = sizeof(struct sockaddr_in); 1339 so_mask.sin.sin_addr.s_addr = htonl(0xffffffff << (32 - len)); 1340 break; 1341 #ifdef INET6 1342 case AF_INET6: 1343 so_mask.sin6.sin6_family = AF_INET6; 1344 so_mask.sin6.sin6_len = sizeof(struct sockaddr_in6); 1345 memset((void *)&so_mask.sin6.sin6_addr, 0, 1346 sizeof(so_mask.sin6.sin6_addr)); 1347 if (q > 0) 1348 memset((void *)&so_mask.sin6.sin6_addr, 0xff, q); 1349 if (r > 0) 1350 *((u_char *)&so_mask.sin6.sin6_addr + q) = 1351 (0xff00 >> r) & 0xff; 1352 break; 1353 #endif 1354 } 1355 return(len); 1356 } 1357 1358 #ifndef SMALL 1359 int 1360 x25_makemask() 1361 { 1362 char *cp; 1363 1364 if ((rtm_addrs & RTA_NETMASK) == 0) { 1365 rtm_addrs |= RTA_NETMASK; 1366 for (cp = (char *)&so_mask.sx25.x25_net; 1367 cp < &so_mask.sx25.x25_opts.op_flags; cp++) 1368 *cp = -1; 1369 so_mask.sx25.x25_len = (u_char)&(((sup)0)->sx25.x25_opts); 1370 } 1371 return 0; 1372 } 1373 1374 1375 char * 1376 ns_print(sns) 1377 struct sockaddr_ns *sns; 1378 { 1379 struct ns_addr work; 1380 union { union ns_net net_e; u_int32_t int32_t_e; } net; 1381 u_short port; 1382 static char mybuf[50], cport[10], chost[25]; 1383 char *host = ""; 1384 char *p; 1385 u_char *q; 1386 1387 work = sns->sns_addr; 1388 port = ntohs(work.x_port); 1389 work.x_port = 0; 1390 net.net_e = work.x_net; 1391 if (ns_nullhost(work) && net.int32_t_e == 0) { 1392 if (!port) 1393 return ("*.*"); 1394 (void)snprintf(mybuf, sizeof mybuf, "*.%XH", port); 1395 return (mybuf); 1396 } 1397 1398 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) 1399 host = "any"; 1400 else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) 1401 host = "*"; 1402 else { 1403 q = work.x_host.c_host; 1404 (void)snprintf(chost, sizeof chost, "%02X%02X%02X%02X%02X%02XH", 1405 q[0], q[1], q[2], q[3], q[4], q[5]); 1406 for (p = chost; *p == '0' && p < chost + 12; p++) 1407 /* void */; 1408 host = p; 1409 } 1410 if (port) 1411 (void)snprintf(cport, sizeof cport, ".%XH", htons(port)); 1412 else 1413 *cport = 0; 1414 1415 (void)snprintf(mybuf, sizeof mybuf, "%XH.%s%s", 1416 (u_int32_t)ntohl(net.int32_t_e), host, cport); 1417 return (mybuf); 1418 } 1419 1420 static void 1421 interfaces() 1422 { 1423 size_t needed; 1424 int mib[6]; 1425 char *buf, *lim, *next; 1426 struct rt_msghdr *rtm; 1427 1428 mib[0] = CTL_NET; 1429 mib[1] = PF_ROUTE; 1430 mib[2] = 0; /* protocol */ 1431 mib[3] = 0; /* wildcard address family */ 1432 mib[4] = NET_RT_IFLIST; 1433 mib[5] = 0; /* no flags */ 1434 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1435 err(1, "route-sysctl-estimate"); 1436 if ((buf = malloc(needed)) == NULL) 1437 err(1, "malloc"); 1438 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 1439 err(1, "actual retrieval of interface table"); 1440 lim = buf + needed; 1441 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1442 rtm = (struct rt_msghdr *)next; 1443 print_rtmsg(rtm, rtm->rtm_msglen); 1444 } 1445 } 1446 1447 static void 1448 monitor() 1449 { 1450 int n; 1451 char msg[2048]; 1452 1453 verbose = 1; 1454 if (debugonly) { 1455 interfaces(); 1456 exit(0); 1457 } 1458 for(;;) { 1459 time_t now; 1460 n = read(s, msg, 2048); 1461 now = time(NULL); 1462 (void) printf("got message of size %d on %s", n, ctime(&now)); 1463 print_rtmsg((struct rt_msghdr *)msg, n); 1464 } 1465 } 1466 1467 #endif /* SMALL */ 1468 1469 1470 struct { 1471 struct rt_msghdr m_rtm; 1472 char m_space[512]; 1473 } m_rtmsg; 1474 1475 static int 1476 rtmsg(cmd, flags) 1477 int cmd, flags; 1478 { 1479 static int seq; 1480 int rlen; 1481 char *cp = m_rtmsg.m_space; 1482 int l; 1483 1484 #define NEXTADDR(w, u) \ 1485 if (rtm_addrs & (w)) {\ 1486 l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\ 1487 if (verbose) sodump(&(u),"u");\ 1488 } 1489 1490 errno = 0; 1491 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1492 if (cmd == 'a') 1493 cmd = RTM_ADD; 1494 else if (cmd == 'c') 1495 cmd = RTM_CHANGE; 1496 else if (cmd == 'g') { 1497 #ifdef SMALL 1498 return (-1); 1499 #else /* SMALL */ 1500 cmd = RTM_GET; 1501 if (so_ifp.sa.sa_family == 0) { 1502 so_ifp.sa.sa_family = AF_LINK; 1503 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1504 rtm_addrs |= RTA_IFP; 1505 } 1506 #endif /* SMALL */ 1507 } else 1508 cmd = RTM_DELETE; 1509 #define rtm m_rtmsg.m_rtm 1510 rtm.rtm_type = cmd; 1511 rtm.rtm_flags = flags; 1512 rtm.rtm_version = RTM_VERSION; 1513 rtm.rtm_seq = ++seq; 1514 rtm.rtm_addrs = rtm_addrs; 1515 rtm.rtm_rmx = rt_metrics; 1516 rtm.rtm_inits = rtm_inits; 1517 1518 if (rtm_addrs & RTA_NETMASK) 1519 mask_addr(); 1520 NEXTADDR(RTA_DST, so_dst); 1521 NEXTADDR(RTA_GATEWAY, so_gate); 1522 NEXTADDR(RTA_NETMASK, so_mask); 1523 NEXTADDR(RTA_GENMASK, so_genmask); 1524 NEXTADDR(RTA_IFP, so_ifp); 1525 NEXTADDR(RTA_IFA, so_ifa); 1526 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1527 if (verbose) 1528 print_rtmsg(&rtm, l); 1529 if (debugonly) 1530 return (0); 1531 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { 1532 perror("writing to routing socket"); 1533 return (-1); 1534 } 1535 #ifndef SMALL 1536 if (cmd == RTM_GET) { 1537 do { 1538 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1539 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1540 if (l < 0) 1541 err(1, "read from routing socket"); 1542 else 1543 print_getmsg(&rtm, l); 1544 } 1545 #endif /* SMALL */ 1546 #undef rtm 1547 return (0); 1548 } 1549 1550 static void 1551 mask_addr() 1552 { 1553 int olen = so_mask.sa.sa_len; 1554 char *cp1 = olen + (char *)&so_mask, *cp2; 1555 1556 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1557 if (*--cp1 != 0) { 1558 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1559 break; 1560 } 1561 if ((rtm_addrs & RTA_DST) == 0) 1562 return; 1563 switch (so_dst.sa.sa_family) { 1564 case AF_INET: 1565 #ifdef INET6 1566 case AF_INET6: 1567 #endif 1568 case AF_APPLETALK: 1569 #ifndef SMALL 1570 case AF_NS: 1571 case AF_CCITT: 1572 #endif /* SMALL */ 1573 case 0: 1574 return; 1575 #ifndef SMALL 1576 case AF_ISO: 1577 olen = MIN(so_dst.siso.siso_nlen, 1578 MAX(so_mask.sa.sa_len - 6, 0)); 1579 break; 1580 #endif /* SMALL */ 1581 } 1582 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1583 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1584 while (cp2 > cp1) 1585 *--cp2 = 0; 1586 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1587 while (cp1 > so_dst.sa.sa_data) 1588 *--cp1 &= *--cp2; 1589 #ifndef SMALL 1590 switch (so_dst.sa.sa_family) { 1591 case AF_ISO: 1592 so_dst.siso.siso_nlen = olen; 1593 break; 1594 } 1595 #endif /* SMALL */ 1596 } 1597 1598 char *msgtypes[] = { 1599 "", 1600 "RTM_ADD: Add Route", 1601 "RTM_DELETE: Delete Route", 1602 "RTM_CHANGE: Change Metrics or flags", 1603 "RTM_GET: Report Metrics", 1604 "RTM_LOSING: Kernel Suspects Partitioning", 1605 "RTM_REDIRECT: Told to use different route", 1606 "RTM_MISS: Lookup failed on this address", 1607 "RTM_LOCK: fix specified metrics", 1608 "RTM_OLDADD: caused by SIOCADDRT", 1609 "RTM_OLDDEL: caused by SIOCDELRT", 1610 "RTM_RESOLVE: Route created by cloning", 1611 "RTM_NEWADDR: address being added to iface", 1612 "RTM_DELADDR: address being removed from iface", 1613 "RTM_OIFINFO: iface status change (pre-1.5)", 1614 "RTM_IFINFO: iface status change", 1615 "RTM_IFANNOUNCE: iface arrival/departure", 1616 0, 1617 }; 1618 1619 char metricnames[] = 1620 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 1621 char routeflags[] = 1622 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016CLONED\017PROTO2\020PROTO1"; 1623 char ifnetflags[] = 1624 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST"; 1625 char addrnames[] = 1626 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1627 1628 static void 1629 print_rtmsg(rtm, msglen) 1630 struct rt_msghdr *rtm; 1631 int msglen; 1632 { 1633 struct if_msghdr *ifm; 1634 struct ifa_msghdr *ifam; 1635 struct if_announcemsghdr *ifan; 1636 1637 if (verbose == 0) 1638 return; 1639 if (rtm->rtm_version != RTM_VERSION) { 1640 (void) printf("routing message version %d not understood\n", 1641 rtm->rtm_version); 1642 return; 1643 } 1644 if (msgtypes[rtm->rtm_type]) 1645 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1646 else 1647 (void)printf("#%d: ", rtm->rtm_type); 1648 (void)printf("len %d, ", rtm->rtm_msglen); 1649 switch (rtm->rtm_type) { 1650 case RTM_IFINFO: 1651 ifm = (struct if_msghdr *)rtm; 1652 (void) printf("if# %d, flags:", ifm->ifm_index); 1653 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1654 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1655 break; 1656 case RTM_NEWADDR: 1657 case RTM_DELADDR: 1658 ifam = (struct ifa_msghdr *)rtm; 1659 (void) printf("metric %d, flags:", ifam->ifam_metric); 1660 bprintf(stdout, ifam->ifam_flags, routeflags); 1661 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1662 break; 1663 case RTM_IFANNOUNCE: 1664 ifan = (struct if_announcemsghdr *)rtm; 1665 (void) printf("if# %d, what: ", ifan->ifan_index); 1666 switch (ifan->ifan_what) { 1667 case IFAN_ARRIVAL: 1668 printf("arrival"); 1669 break; 1670 case IFAN_DEPARTURE: 1671 printf("departure"); 1672 break; 1673 default: 1674 printf("#%d", ifan->ifan_what); 1675 break; 1676 } 1677 printf("\n"); 1678 break; 1679 default: 1680 (void) printf("pid: %d, seq %d, errno %d, flags:", 1681 rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1682 bprintf(stdout, rtm->rtm_flags, routeflags); 1683 pmsg_common(rtm); 1684 } 1685 } 1686 1687 #ifndef SMALL 1688 static void 1689 print_getmsg(rtm, msglen) 1690 struct rt_msghdr *rtm; 1691 int msglen; 1692 { 1693 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL, *ifa = NULL; 1694 struct sockaddr_dl *ifp = NULL; 1695 struct sockaddr *sa; 1696 char *cp; 1697 int i; 1698 1699 (void) printf(" route to: %s\n", 1700 routename((struct sockaddr *) &so_dst, NULL, RTF_HOST)); 1701 if (rtm->rtm_version != RTM_VERSION) { 1702 warnx("routing message version %d not understood", 1703 rtm->rtm_version); 1704 return; 1705 } 1706 if (rtm->rtm_msglen > msglen) { 1707 warnx("message length mismatch, in packet %d, returned %d\n", 1708 rtm->rtm_msglen, msglen); 1709 } 1710 if (rtm->rtm_errno) { 1711 warn("RTM_GET"); 1712 return; 1713 } 1714 cp = ((char *)(rtm + 1)); 1715 if (rtm->rtm_addrs) 1716 for (i = 1; i; i <<= 1) 1717 if (i & rtm->rtm_addrs) { 1718 sa = (struct sockaddr *)cp; 1719 switch (i) { 1720 case RTA_DST: 1721 dst = sa; 1722 break; 1723 case RTA_GATEWAY: 1724 gate = sa; 1725 break; 1726 case RTA_NETMASK: 1727 mask = sa; 1728 break; 1729 case RTA_IFP: 1730 if (sa->sa_family == AF_LINK && 1731 ((struct sockaddr_dl *)sa)->sdl_nlen) 1732 ifp = (struct sockaddr_dl *)sa; 1733 break; 1734 case RTA_IFA: 1735 ifa = sa; 1736 break; 1737 } 1738 ADVANCE(cp, sa); 1739 } 1740 if (dst && mask) 1741 mask->sa_family = dst->sa_family; /* XXX */ 1742 if (dst) 1743 (void)printf("destination: %s\n", 1744 routename(dst, mask, RTF_HOST)); 1745 if (mask) { 1746 int savenflag = nflag; 1747 1748 nflag = 1; 1749 (void)printf(" mask: %s\n", 1750 routename(mask, NULL, RTF_HOST)); 1751 nflag = savenflag; 1752 } 1753 if (gate && rtm->rtm_flags & RTF_GATEWAY) 1754 (void)printf(" gateway: %s\n", 1755 routename(gate, NULL, RTF_HOST)); 1756 if (ifa) 1757 (void)printf(" local addr: %s\n", 1758 routename(ifa, NULL, RTF_HOST)); 1759 if (ifp) 1760 (void)printf(" interface: %.*s\n", 1761 ifp->sdl_nlen, ifp->sdl_data); 1762 (void)printf(" flags: "); 1763 bprintf(stdout, rtm->rtm_flags, routeflags); 1764 1765 #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1766 #define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1767 1768 (void) printf("\n%s\n", "\ 1769 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1770 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1771 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1772 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1773 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1774 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1775 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1776 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1777 if (rtm->rtm_rmx.rmx_expire) 1778 rtm->rtm_rmx.rmx_expire -= time(0); 1779 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1780 #undef lock 1781 #undef msec 1782 #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1783 if (verbose) 1784 pmsg_common(rtm); 1785 else if (rtm->rtm_addrs &~ RTA_IGN) { 1786 (void) printf("sockaddrs: "); 1787 bprintf(stdout, rtm->rtm_addrs, addrnames); 1788 putchar('\n'); 1789 } 1790 #undef RTA_IGN 1791 } 1792 #endif /* SMALL */ 1793 1794 void 1795 pmsg_common(rtm) 1796 struct rt_msghdr *rtm; 1797 { 1798 (void) printf("\nlocks: "); 1799 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1800 (void) printf(" inits: "); 1801 bprintf(stdout, rtm->rtm_inits, metricnames); 1802 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1803 } 1804 1805 static void 1806 pmsg_addrs(cp, addrs) 1807 char *cp; 1808 int addrs; 1809 { 1810 struct sockaddr *sa; 1811 int i; 1812 1813 if (addrs != 0) { 1814 (void) printf("\nsockaddrs: "); 1815 bprintf(stdout, addrs, addrnames); 1816 (void) putchar('\n'); 1817 for (i = 1; i; i <<= 1) 1818 if (i & addrs) { 1819 sa = (struct sockaddr *)cp; 1820 (void) printf(" %s", 1821 routename(sa, NULL, RTF_HOST)); 1822 ADVANCE(cp, sa); 1823 } 1824 } 1825 (void) putchar('\n'); 1826 (void) fflush(stdout); 1827 } 1828 1829 static void 1830 bprintf(fp, b, s) 1831 FILE *fp; 1832 int b; 1833 u_char *s; 1834 { 1835 int i; 1836 int gotsome = 0; 1837 1838 if (b == 0) 1839 return; 1840 while ((i = *s++) != 0) { 1841 if (b & (1 << (i-1))) { 1842 if (gotsome == 0) 1843 i = '<'; 1844 else 1845 i = ','; 1846 (void) putc(i, fp); 1847 gotsome = 1; 1848 for (; (i = *s) > 32; s++) 1849 (void) putc(i, fp); 1850 } else 1851 while (*s > 32) 1852 s++; 1853 } 1854 if (gotsome) 1855 (void) putc('>', fp); 1856 } 1857 1858 static int 1859 keyword(cp) 1860 char *cp; 1861 { 1862 struct keytab *kt = keywords; 1863 1864 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1865 kt++; 1866 return kt->kt_i; 1867 } 1868 1869 static void 1870 sodump(su, which) 1871 sup su; 1872 char *which; 1873 { 1874 #ifdef INET6 1875 char ntop_buf[NI_MAXHOST]; 1876 #endif 1877 1878 switch (su->sa.sa_family) { 1879 case AF_INET: 1880 (void) printf("%s: inet %s; ", 1881 which, inet_ntoa(su->sin.sin_addr)); 1882 break; 1883 case AF_APPLETALK: 1884 (void) printf("%s: atalk %d.%d; ", 1885 which, su->sat.sat_addr.s_net, su->sat.sat_addr.s_node); 1886 break; 1887 case AF_LINK: 1888 (void) printf("%s: link %s; ", 1889 which, link_ntoa(&su->sdl)); 1890 break; 1891 #ifndef SMALL 1892 #ifdef INET6 1893 case AF_INET6: 1894 (void) printf("%s: inet6 %s; ", 1895 which, inet_ntop(AF_INET6, &su->sin6.sin6_addr, 1896 ntop_buf, sizeof(ntop_buf))); 1897 break; 1898 #endif 1899 case AF_ISO: 1900 (void) printf("%s: iso %s; ", 1901 which, iso_ntoa(&su->siso.siso_addr)); 1902 break; 1903 case AF_NS: 1904 (void) printf("%s: xns %s; ", 1905 which, ns_ntoa(su->sns.sns_addr)); 1906 break; 1907 #endif /* SMALL */ 1908 default: 1909 (void) printf("af %p: %s; ", 1910 which, any_ntoa(&su->sa)); 1911 } 1912 (void) fflush(stdout); 1913 } 1914 1915 /* States*/ 1916 #define VIRGIN 0 1917 #define GOTONE 1 1918 #define GOTTWO 2 1919 /* Inputs */ 1920 #define DIGIT (4*0) 1921 #define END (4*1) 1922 #define DELIM (4*2) 1923 1924 static void 1925 sockaddr(addr, sa) 1926 char *addr; 1927 struct sockaddr *sa; 1928 { 1929 char *cp = (char *)sa; 1930 int size = sa->sa_len; 1931 char *cplim = cp + size; 1932 int byte = 0, state = VIRGIN, new = 0; 1933 1934 (void) memset(cp, 0, size); 1935 cp++; 1936 do { 1937 if ((*addr >= '0') && (*addr <= '9')) { 1938 new = *addr - '0'; 1939 } else if ((*addr >= 'a') && (*addr <= 'f')) { 1940 new = *addr - 'a' + 10; 1941 } else if ((*addr >= 'A') && (*addr <= 'F')) { 1942 new = *addr - 'A' + 10; 1943 } else if (*addr == 0) 1944 state |= END; 1945 else 1946 state |= DELIM; 1947 addr++; 1948 switch (state /* | INPUT */) { 1949 case GOTTWO | DIGIT: 1950 *cp++ = byte; /*FALLTHROUGH*/ 1951 case VIRGIN | DIGIT: 1952 state = GOTONE; byte = new; continue; 1953 case GOTONE | DIGIT: 1954 state = GOTTWO; byte = new + (byte << 4); continue; 1955 default: /* | DELIM */ 1956 state = VIRGIN; *cp++ = byte; byte = 0; continue; 1957 case GOTONE | END: 1958 case GOTTWO | END: 1959 *cp++ = byte; /* FALLTHROUGH */ 1960 case VIRGIN | END: 1961 break; 1962 } 1963 break; 1964 } while (cp < cplim); 1965 sa->sa_len = cp - (char *)sa; 1966 } 1967
Indexes created Thu Sep 25 16:09:42 GMT 2025