route.c revision 1.64
1/* $NetBSD: route.c,v 1.64 2003/05/17 23:02:28 itojun 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 44static char sccsid[] = "@(#)route.c 8.6 (Berkeley) 4/28/95"; 45#else 46__RCSID("$NetBSD: route.c,v 1.64 2003/05/17 23:02:28 itojun 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 81typedef union sockunion *sup; 82 83int main __P((int, char **)); 84static void usage __P((char *)) __attribute__((__noreturn__)); 85static char *any_ntoa __P((const struct sockaddr *)); 86static void set_metric __P((char *, int)); 87static int newroute __P((int, char **)); 88static void inet_makenetandmask __P((u_int32_t, struct sockaddr_in *)); 89#ifdef INET6 90static int inet6_makenetandmask __P((struct sockaddr_in6 *)); 91#endif 92static int getaddr __P((int, char *, struct hostent **)); 93static int flushroutes __P((int, char *[])); 94#ifndef SMALL 95static int prefixlen __P((char *)); 96static int x25_makemask __P((void)); 97static void interfaces __P((void)); 98static void monitor __P((void)); 99static void print_getmsg __P((struct rt_msghdr *, int)); 100static const char *linkstate __P((struct if_msghdr *)); 101#endif /* SMALL */ 102static int rtmsg __P((int, int )); 103static void mask_addr __P((void)); 104static void print_rtmsg __P((struct rt_msghdr *, int)); 105static void pmsg_common __P((struct rt_msghdr *)); 106static void pmsg_addrs __P((char *, int)); 107static void bprintf __P((FILE *, int, u_char *)); 108static int keyword __P((char *)); 109static void sodump __P((sup, char *)); 110static void sockaddr __P((char *, struct sockaddr *)); 111 112union sockunion { 113 struct sockaddr sa; 114 struct sockaddr_in sin; 115#ifdef INET6 116 struct sockaddr_in6 sin6; 117#endif 118 struct sockaddr_at sat; 119 struct sockaddr_dl sdl; 120#ifndef SMALL 121 struct sockaddr_ns sns; 122 struct sockaddr_iso siso; 123 struct sockaddr_x25 sx25; 124#endif /* SMALL */ 125} so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp; 126 127int pid, rtm_addrs; 128int sock; 129int forcehost, forcenet, doflush, nflag, af, qflag, tflag; 130int iflag, verbose, aflen = sizeof (struct sockaddr_in); 131int locking, lockrest, debugonly, shortoutput, rv; 132struct rt_metrics rt_metrics; 133u_int32_t rtm_inits; 134short ns_nullh[] = {0,0,0}; 135short ns_bh[] = {-1,-1,-1}; 136 137 138static void 139usage(cp) 140 char *cp; 141{ 142 143 if (cp) 144 warnx("botched keyword: %s", cp); 145 (void) fprintf(stderr, 146 "Usage: %s [ -fnqvs ] cmd [[ -<qualifers> ] args ]\n", 147 getprogname()); 148 exit(1); 149 /* NOTREACHED */ 150} 151 152#define ROUNDUP(a) \ 153 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 154#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 155 156int 157main(argc, argv) 158 int argc; 159 char **argv; 160{ 161 int ch; 162 163 if (argc < 2) 164 usage(NULL); 165 166 while ((ch = getopt(argc, argv, "fnqvdts")) != -1) 167 switch(ch) { 168 case 'f': 169 doflush = 1; 170 break; 171 case 'n': 172 nflag = 1; 173 break; 174 case 'q': 175 qflag = 1; 176 break; 177 case 'v': 178 verbose = 1; 179 break; 180 case 't': 181 tflag = 1; 182 break; 183 case 'd': 184 debugonly = 1; 185 break; 186 case 's': 187 shortoutput = 1; 188 break; 189 case '?': 190 default: 191 usage(NULL); 192 /*NOTREACHED*/ 193 } 194 argc -= optind; 195 argv += optind; 196 197 pid = getpid(); 198 if (tflag) 199 sock = open("/dev/null", O_WRONLY, 0); 200 else 201 sock = socket(PF_ROUTE, SOCK_RAW, 0); 202 if (sock < 0) 203 err(1, "socket"); 204 205 if (*argv == NULL) { 206 if (doflush) 207 ch = K_FLUSH; 208 else 209 goto no_cmd; 210 } else 211 ch = keyword(*argv); 212 213 switch (ch) { 214#ifndef SMALL 215 case K_GET: 216#endif /* SMALL */ 217 case K_CHANGE: 218 case K_ADD: 219 case K_DELETE: 220 if (doflush) 221 (void)flushroutes(1, argv); 222 return newroute(argc, argv); 223 224 case K_SHOW: 225 show(argc, argv); 226 return 0; 227 228#ifndef SMALL 229 case K_MONITOR: 230 monitor(); 231 return 0; 232 233#endif /* SMALL */ 234 case K_FLUSH: 235 return flushroutes(argc, argv); 236 237 no_cmd: 238 default: 239 usage(*argv); 240 /*NOTREACHED*/ 241 } 242} 243 244/* 245 * Purge all entries in the routing tables not 246 * associated with network interfaces. 247 */ 248static int 249flushroutes(argc, argv) 250 int argc; 251 char *argv[]; 252{ 253 size_t needed; 254 int mib[6], rlen, seqno; 255 char *buf, *next, *lim; 256 struct rt_msghdr *rtm; 257 258 af = 0; 259 shutdown(sock, SHUT_RD); /* Don't want to read back our messages */ 260 if (argc > 1) { 261 argv++; 262 if (argc == 2 && **argv == '-') 263 switch (keyword(*argv + 1)) { 264 case K_INET: 265 af = AF_INET; 266 break; 267#ifdef INET6 268 case K_INET6: 269 af = AF_INET6; 270 break; 271#endif 272 case K_ATALK: 273 af = AF_APPLETALK; 274 break; 275#ifndef SMALL 276 case K_XNS: 277 af = AF_NS; 278 break; 279#endif /* SMALL */ 280 case K_LINK: 281 af = AF_LINK; 282 break; 283#ifndef SMALL 284 case K_ISO: 285 case K_OSI: 286 af = AF_ISO; 287 break; 288 case K_X25: 289 af = AF_CCITT; 290#endif /* SMALL */ 291 default: 292 goto bad; 293 } else 294bad: usage(*argv); 295 } 296 mib[0] = CTL_NET; 297 mib[1] = PF_ROUTE; 298 mib[2] = 0; /* protocol */ 299 mib[3] = 0; /* wildcard address family */ 300 mib[4] = NET_RT_DUMP; 301 mib[5] = 0; /* no flags */ 302 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 303 err(1, "route-sysctl-estimate"); 304 if (needed == 0) 305 return 0; 306 if ((buf = malloc(needed)) == NULL) 307 err(1, "malloc"); 308 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 309 err(1, "actual retrieval of routing table"); 310 lim = buf + needed; 311 if (verbose) { 312 (void) printf("Examining routing table from sysctl\n"); 313 if (af) printf("(address family %s)\n", (*argv + 1)); 314 } 315 seqno = 0; /* ??? */ 316 for (next = buf; next < lim; next += rtm->rtm_msglen) { 317 rtm = (struct rt_msghdr *)next; 318 if (verbose) 319 print_rtmsg(rtm, rtm->rtm_msglen); 320 if ((rtm->rtm_flags & RTF_GATEWAY) == 0) 321 continue; 322 if (af) { 323 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 324 325 if (sa->sa_family != af) 326 continue; 327 } 328 if (debugonly) 329 continue; 330 rtm->rtm_type = RTM_DELETE; 331 rtm->rtm_seq = seqno; 332 rlen = write(sock, next, rtm->rtm_msglen); 333 if (rlen < (int)rtm->rtm_msglen) { 334 warn("write to routing socket, got %d for rlen", rlen); 335 break; 336 } 337 seqno++; 338 if (qflag) 339 continue; 340 if (verbose) 341 print_rtmsg(rtm, rlen); 342 else { 343 struct sockaddr *sa = (struct sockaddr *)(rtm + 1); 344 (void) printf("%-20.20s ", 345 routename(sa, NULL, rtm->rtm_flags)); 346 sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa); 347 (void) printf("%-20.20s ", 348 routename(sa, NULL, RTF_HOST)); 349 (void) printf("done\n"); 350 } 351 } 352 return 0; 353} 354 355 356static char hexlist[] = "0123456789abcdef"; 357 358static char * 359any_ntoa(sa) 360 const struct sockaddr *sa; 361{ 362 static char obuf[64]; 363 const char *in; 364 char *out; 365 int len; 366 367 len = sa->sa_len; 368 in = sa->sa_data; 369 out = obuf; 370 371 do { 372 *out++ = hexlist[(*in >> 4) & 15]; 373 *out++ = hexlist[(*in++) & 15]; 374 *out++ = '.'; 375 } while (--len > 0); 376 out[-1] = '\0'; 377 return obuf; 378} 379 380 381int 382netmask_length(nm, family) 383 struct sockaddr *nm; 384 int family; 385{ 386 static int 387 /* number of bits in a nibble */ 388 _t[] = { 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4 }, 389 /* good nibbles are 1111, 1110, 1100, 1000, 0000 */ 390 _g[] = { 1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,1 }; 391 int mask, good, zeroes, maskbytes, bit, i; 392 unsigned char *maskdata; 393 394 if (nm == NULL) 395 return 0; 396 397 mask = 0; 398 good = 1; 399 zeroes = 0; 400 401 switch (family) { 402 case AF_INET: { 403 struct sockaddr_in *nsin = (struct sockaddr_in *)nm; 404 maskdata = (unsigned char *) &nsin->sin_addr; 405 maskbytes = nsin->sin_len - 406 ((caddr_t)&nsin->sin_addr - (caddr_t)nsin); 407 break; 408 } 409 case AF_INET6: { 410 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nm; 411 maskdata = (unsigned char *) &sin6->sin6_addr; 412 maskbytes = sin6->sin6_len - 413 ((caddr_t)&sin6->sin6_addr - (caddr_t)sin6); 414 break; 415 } 416 default: 417 return 0; 418 } 419 420 /* 421 * Count the bits in the nibbles of the mask, and marking the 422 * netmask as not good (or at best, non-standard and very 423 * discouraged, in the case of AF_INET) if we find either of 424 * a nibble with non-contiguous bits, or a non-zero nibble 425 * after we've found a zero nibble. 426 */ 427 for (i = 0; i < maskbytes; i++) { 428 /* high nibble */ 429 mask += bit = _t[maskdata[i] >> 4]; 430 good &= _g[maskdata[i] >> 4]; 431 if (zeroes && bit) 432 good = 0; 433 if (bit == 0) 434 zeroes = 1; 435 /* low nibble */ 436 mask += bit = _t[maskdata[i] & 0xf]; 437 good &= _g[maskdata[i] & 0xf]; 438 if (zeroes && bit) 439 good = 0; 440 if (bit == 0) 441 zeroes = 1; 442 } 443 444 /* 445 * Always return the number of bits found, but as a negative 446 * if the mask wasn't one we like. 447 */ 448 return good ? mask : -mask; 449} 450 451char * 452netmask_string(mask, len) 453 struct sockaddr *mask; 454 int len; 455{ 456 static char smask[16]; 457 458 if (len >= 0) 459 snprintf(smask, sizeof(smask), "%d", len); 460 else { 461 /* XXX AF_INET only?! */ 462 struct sockaddr_in nsin; 463 464 memset(&nsin, 0, sizeof(nsin)); 465 memcpy(&nsin, mask, mask->sa_len); 466 snprintf(smask, sizeof(smask), "%s", inet_ntoa(nsin.sin_addr)); 467 } 468 469 return smask; 470} 471 472 473char * 474routename(sa, nm, flags) 475 struct sockaddr *sa, *nm; 476 int flags; 477{ 478 char *cp; 479 static char line[50]; 480 struct hostent *hp; 481 static char domain[MAXHOSTNAMELEN + 1]; 482 static int first = 1; 483 struct in_addr in; 484 int nml; 485 486 if ((flags & RTF_HOST) == 0) 487 return netname(sa, nm); 488 489 if (first) { 490 first = 0; 491 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 492 (cp = strchr(domain, '.'))) 493 (void)strlcpy(domain, cp + 1, sizeof(domain)); 494 else 495 domain[0] = 0; 496 } 497 498 if (sa->sa_len == 0) 499 strlcpy(line, "default", sizeof(line)); 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)strlcpy(line, cp, sizeof(line)); 530 else 531 (void)strlcpy(line, inet_ntoa(in), sizeof(line)); 532 break; 533 534 case AF_LINK: 535 return (link_ntoa((struct sockaddr_dl *)sa)); 536 537#ifndef SMALL 538#ifdef INET6 539 case AF_INET6: 540 { 541 struct sockaddr_in6 sin6; 542 int niflags; 543 544#ifdef NI_WITHSCOPEID 545 niflags = NI_WITHSCOPEID; 546#else 547 niflags = 0; 548#endif 549 if (nflag) 550 niflags |= NI_NUMERICHOST; 551 memset(&sin6, 0, sizeof(sin6)); 552 memcpy(&sin6, sa, sa->sa_len); 553 sin6.sin6_len = sizeof(struct sockaddr_in6); 554 sin6.sin6_family = AF_INET6; 555#ifdef __KAME__ 556 if (sa->sa_len == sizeof(struct sockaddr_in6) && 557 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 558 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 559 sin6.sin6_scope_id == 0) { 560 sin6.sin6_scope_id = 561 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 562 sin6.sin6_addr.s6_addr[2] = 0; 563 sin6.sin6_addr.s6_addr[3] = 0; 564 } 565#endif 566 nml = netmask_length(nm, AF_INET6); 567 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 568 if (nml == 0) 569 strlcpy(line, "::", sizeof(line)); 570 else 571 /* noncontiguous never happens in ipv6 */ 572 snprintf(line, sizeof(line), "::/%d", nml); 573 } 574 575 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 576 line, sizeof(line), NULL, 0, niflags) != 0) 577 strlcpy(line, "invalid", sizeof(line)); 578 break; 579 } 580#endif 581 582 case AF_NS: 583 return (ns_print((struct sockaddr_ns *)sa)); 584 585 case AF_ISO: 586 (void)snprintf(line, sizeof line, "iso %s", 587 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 588 break; 589#endif /* SMALL */ 590 591 case AF_APPLETALK: 592 (void) snprintf(line, sizeof(line), "atalk %d.%d", 593 ((struct sockaddr_at *)sa)->sat_addr.s_net, 594 ((struct sockaddr_at *)sa)->sat_addr.s_node); 595 break; 596 597 default: 598 (void)snprintf(line, sizeof line, "(%d) %s", 599 sa->sa_family, any_ntoa(sa)); 600 break; 601 602 } 603 return (line); 604} 605 606/* 607 * Return the name of the network whose address is given. 608 * The address is assumed to be that of a net or subnet, not a host. 609 */ 610char * 611netname(sa, nm) 612 struct sockaddr *sa, *nm; 613{ 614 char *cp = 0; 615 static char line[50]; 616 struct netent *np = 0; 617 u_int32_t net, mask; 618 u_int32_t i; 619 int subnetshift, nml; 620 struct in_addr in; 621 622 switch (sa->sa_family) { 623 624 case AF_INET: 625 in = ((struct sockaddr_in *)sa)->sin_addr; 626 i = ntohl(in.s_addr); 627 nml = netmask_length(nm, AF_INET); 628 if (i == 0) { 629 if (nml == 0) 630 cp = "default"; 631 else { 632 static char notdefault[sizeof(NOTDEFSTRING)]; 633 634 snprintf(notdefault, sizeof(notdefault), 635 "0.0.0.0/%s", netmask_string(nm, nml)); 636 cp = notdefault; 637 } 638 } 639 else if (!nflag) { 640 if (IN_CLASSA(i)) { 641 mask = IN_CLASSA_NET; 642 subnetshift = 8; 643 } else if (IN_CLASSB(i)) { 644 mask = IN_CLASSB_NET; 645 subnetshift = 8; 646 } else { 647 mask = IN_CLASSC_NET; 648 subnetshift = 4; 649 } 650 /* 651 * If there are more bits than the standard mask 652 * would suggest, subnets must be in use. 653 * Guess at the subnet mask, assuming reasonable 654 * width subnet fields. 655 */ 656 while (i &~ mask) 657 mask = (int32_t)mask >> subnetshift; 658 net = i & mask; 659 while ((mask & 1) == 0) 660 mask >>= 1, net >>= 1; 661 np = getnetbyaddr(net, AF_INET); 662 if (np) 663 cp = np->n_name; 664 } 665 if (cp) 666 (void)strlcpy(line, cp, sizeof(line)); 667 else { 668#if 0 /* XXX - This is silly... */ 669#define C(x) ((x) & 0xff) 670 if ((i & 0xffffff) == 0) 671 (void)snprintf(line, sizeof line, "%u", 672 C(i >> 24)); 673 else if ((i & 0xffff) == 0) 674 (void)snprintf(line, sizeof line, "%u.%u", 675 C(i >> 24), C(i >> 16)); 676 else if ((i & 0xff) == 0) 677 (void)snprintf(line, sizeof line, "%u.%u.%u", 678 C(i >> 24), C(i >> 16), C(i >> 8)); 679 else 680 (void)snprintf(line, sizeof line, "%u.%u.%u.%u", 681 C(i >> 24), C(i >> 16), C(i >> 8), C(i)); 682#undef C 683#else /* XXX */ 684 (void)strlcpy(line, inet_ntoa(in), sizeof(line)); 685#endif /* XXX */ 686 } 687 break; 688 689 case AF_LINK: 690 return (link_ntoa((struct sockaddr_dl *)sa)); 691 692#ifndef SMALL 693#ifdef INET6 694 case AF_INET6: 695 { 696 struct sockaddr_in6 sin6; 697 int niflags; 698 699#ifdef NI_WITHSCOPEID 700 niflags = NI_WITHSCOPEID; 701#else 702 niflags = 0; 703#endif 704 if (nflag) 705 niflags |= NI_NUMERICHOST; 706 memset(&sin6, 0, sizeof(sin6)); 707 memcpy(&sin6, sa, sa->sa_len); 708 sin6.sin6_len = sizeof(struct sockaddr_in6); 709 sin6.sin6_family = AF_INET6; 710#ifdef __KAME__ 711 if (sa->sa_len == sizeof(struct sockaddr_in6) && 712 (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) || 713 IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) && 714 sin6.sin6_scope_id == 0) { 715 sin6.sin6_scope_id = 716 ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 717 sin6.sin6_addr.s6_addr[2] = 0; 718 sin6.sin6_addr.s6_addr[3] = 0; 719 } 720#endif 721 nml = netmask_length(nm, AF_INET6); 722 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr)) { 723 if (nml == 0) 724 strlcpy(line, "::", sizeof(line)); 725 else 726 /* noncontiguous never happens in ipv6 */ 727 snprintf(line, sizeof(line), "::/%d", nml); 728 } 729 730 else if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 731 line, sizeof(line), NULL, 0, niflags) != 0) 732 strlcpy(line, "invalid", sizeof(line)); 733 break; 734 } 735#endif 736 737 case AF_NS: 738 return (ns_print((struct sockaddr_ns *)sa)); 739 740 case AF_ISO: 741 (void)snprintf(line, sizeof line, "iso %s", 742 iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); 743 break; 744#endif /* SMALL */ 745 746 case AF_APPLETALK: 747 (void) snprintf(line, sizeof(line), "atalk %d.%d", 748 ((struct sockaddr_at *)sa)->sat_addr.s_net, 749 ((struct sockaddr_at *)sa)->sat_addr.s_node); 750 break; 751 752 default: 753 (void)snprintf(line, sizeof line, "af %d: %s", 754 sa->sa_family, any_ntoa(sa)); 755 break; 756 } 757 return (line); 758} 759 760static void 761set_metric(value, key) 762 char *value; 763 int key; 764{ 765 int flag = 0; 766 u_long noval, *valp = &noval; 767 768 switch (key) { 769#define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break 770 caseof(K_MTU, RTV_MTU, rmx_mtu); 771 caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); 772 caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); 773 caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); 774 caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); 775 caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); 776 caseof(K_RTT, RTV_RTT, rmx_rtt); 777 caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); 778 } 779 rtm_inits |= flag; 780 if (lockrest || locking) 781 rt_metrics.rmx_locks |= flag; 782 if (locking) 783 locking = 0; 784 *valp = atoi(value); 785} 786 787static int 788newroute(argc, argv) 789 int argc; 790 char **argv; 791{ 792 char *cmd, *dest = "", *gateway = ""; 793 const char *error; 794 int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC; 795 int key; 796 struct hostent *hp = 0; 797 798 cmd = argv[0]; 799 af = 0; 800 if (*cmd != 'g') 801 shutdown(sock, SHUT_RD); /* Don't want to read back our messages */ 802 while (--argc > 0) { 803 if (**(++argv)== '-') { 804 switch (key = keyword(1 + *argv)) { 805 806 case K_SA: 807 af = PF_ROUTE; 808 aflen = sizeof(union sockunion); 809 break; 810 811 case K_ATALK: 812 af = AF_APPLETALK; 813 aflen = sizeof(struct sockaddr_at); 814 break; 815 816 case K_INET: 817 af = AF_INET; 818 aflen = sizeof(struct sockaddr_in); 819 break; 820 821#ifdef INET6 822 case K_INET6: 823 af = AF_INET6; 824 aflen = sizeof(struct sockaddr_in6); 825 break; 826#endif 827 828 case K_LINK: 829 af = AF_LINK; 830 aflen = sizeof(struct sockaddr_dl); 831 break; 832 833#ifndef SMALL 834 case K_OSI: 835 case K_ISO: 836 af = AF_ISO; 837 aflen = sizeof(struct sockaddr_iso); 838 break; 839 840 case K_X25: 841 af = AF_CCITT; 842 aflen = sizeof(struct sockaddr_x25); 843 break; 844 845 case K_XNS: 846 af = AF_NS; 847 aflen = sizeof(struct sockaddr_ns); 848 break; 849#endif /* SMALL */ 850 851 case K_IFACE: 852 case K_INTERFACE: 853 iflag++; 854 break; 855 case K_NOSTATIC: 856 flags &= ~RTF_STATIC; 857 break; 858 case K_LLINFO: 859 flags |= RTF_LLINFO; 860 break; 861 case K_LOCK: 862 locking = 1; 863 break; 864 case K_LOCKREST: 865 lockrest = 1; 866 break; 867 case K_HOST: 868 forcehost++; 869 break; 870 case K_REJECT: 871 flags |= RTF_REJECT; 872 break; 873 case K_BLACKHOLE: 874 flags |= RTF_BLACKHOLE; 875 break; 876 case K_CLONED: 877 flags |= RTF_CLONED; 878 break; 879 case K_PROTO1: 880 flags |= RTF_PROTO1; 881 break; 882 case K_PROTO2: 883 flags |= RTF_PROTO2; 884 break; 885 case K_CLONING: 886 flags |= RTF_CLONING; 887 break; 888 case K_XRESOLVE: 889 flags |= RTF_XRESOLVE; 890 break; 891 case K_STATIC: 892 flags |= RTF_STATIC; 893 break; 894 case K_IFA: 895 if (!--argc) 896 usage(1+*argv); 897 (void) getaddr(RTA_IFA, *++argv, 0); 898 break; 899 case K_IFP: 900 if (!--argc) 901 usage(1+*argv); 902 (void) getaddr(RTA_IFP, *++argv, 0); 903 break; 904 case K_GENMASK: 905 if (!--argc) 906 usage(1+*argv); 907 (void) getaddr(RTA_GENMASK, *++argv, 0); 908 break; 909 case K_GATEWAY: 910 if (!--argc) 911 usage(1+*argv); 912 (void) getaddr(RTA_GATEWAY, *++argv, 0); 913 break; 914 case K_DST: 915 if (!--argc) 916 usage(1+*argv); 917 ishost = getaddr(RTA_DST, *++argv, &hp); 918 dest = *argv; 919 break; 920 case K_NETMASK: 921 if (!--argc) 922 usage(1+*argv); 923 (void) getaddr(RTA_NETMASK, *++argv, 0); 924 /* FALLTHROUGH */ 925 case K_NET: 926 forcenet++; 927 break; 928 case K_PREFIXLEN: 929 if (!--argc) 930 usage(1+*argv); 931 ishost = prefixlen(*++argv); 932 break; 933 case K_MTU: 934 case K_HOPCOUNT: 935 case K_EXPIRE: 936 case K_RECVPIPE: 937 case K_SENDPIPE: 938 case K_SSTHRESH: 939 case K_RTT: 940 case K_RTTVAR: 941 if (!--argc) 942 usage(1+*argv); 943 set_metric(*++argv, key); 944 break; 945 default: 946 usage(1+*argv); 947 } 948 } else { 949 if ((rtm_addrs & RTA_DST) == 0) { 950 dest = *argv; 951 ishost = getaddr(RTA_DST, *argv, &hp); 952 } else if ((rtm_addrs & RTA_GATEWAY) == 0) { 953 gateway = *argv; 954 (void) getaddr(RTA_GATEWAY, *argv, &hp); 955 } else { 956 ret = atoi(*argv); 957 958 if (ret == 0) { 959 if (!qflag && strcmp(*argv, "0") == 0) 960 warnx("%s, %s", 961 "old usage of trailing 0", 962 "assuming route to if"); 963 else 964 usage((char *)NULL); 965 iflag = 1; 966 continue; 967 } else if (ret > 0 && ret < 10) { 968 if (!qflag) { 969 warnx("%s, %s", 970 "old usage of trailing digit", 971 "assuming route via gateway"); 972 } 973 iflag = 0; 974 continue; 975 } 976 (void) getaddr(RTA_NETMASK, *argv, 0); 977 } 978 } 979 } 980 if (forcehost) 981 ishost = 1; 982 if (forcenet) 983 ishost = 0; 984 flags |= RTF_UP; 985 if (ishost) 986 flags |= RTF_HOST; 987 if (iflag == 0) 988 flags |= RTF_GATEWAY; 989 for (attempts = 1; ; attempts++) { 990 errno = 0; 991 if ((ret = rtmsg(*cmd, flags)) == 0) 992 break; 993 if (errno != ENETUNREACH && errno != ESRCH) 994 break; 995 if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { 996 hp->h_addr_list++; 997 memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0], 998 hp->h_length); 999 } else 1000 break; 1001 } 1002 if (*cmd == 'g') 1003 return rv; 1004 oerrno = errno; 1005 if (!qflag) { 1006 (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); 1007 if (*gateway) { 1008 (void) printf(": gateway %s", gateway); 1009 if (attempts > 1 && ret == 0 && af == AF_INET) 1010 (void) printf(" (%s)", 1011 inet_ntoa(so_gate.sin.sin_addr)); 1012 } 1013 if (ret == 0) 1014 (void) printf("\n"); 1015 } 1016 if (ret != 0) { 1017 switch (oerrno) { 1018 case ESRCH: 1019 error = "not in table"; 1020 break; 1021 case EBUSY: 1022 error = "entry in use"; 1023 break; 1024 case ENOBUFS: 1025 error = "routing table overflow"; 1026 break; 1027 default: 1028 error = strerror(oerrno); 1029 break; 1030 } 1031 (void) printf(": %s\n", error); 1032 return 1; 1033 } 1034 return 0; 1035} 1036 1037static void 1038inet_makenetandmask(net, isin) 1039 u_int32_t net; 1040 struct sockaddr_in *isin; 1041{ 1042 u_int32_t addr, mask = 0; 1043 char *cp; 1044 1045 rtm_addrs |= RTA_NETMASK; 1046 if (net == 0) 1047 mask = addr = 0; 1048 else if (net < 128) { 1049 addr = net << IN_CLASSA_NSHIFT; 1050 mask = IN_CLASSA_NET; 1051 } else if (net < 192) { 1052 addr = net << IN_CLASSA_NSHIFT; 1053 mask = IN_CLASSB_NET; 1054 } else if (net < 224) { 1055 addr = net << IN_CLASSA_NSHIFT; 1056 mask = IN_CLASSC_NET; 1057 } else if (net < 256) { 1058 addr = net << IN_CLASSA_NSHIFT; 1059 mask = IN_CLASSD_NET; 1060 } else if (net < 49152) { /* 192 * 256 */ 1061 addr = net << IN_CLASSB_NSHIFT; 1062 mask = IN_CLASSB_NET; 1063 } else if (net < 57344) { /* 224 * 256 */ 1064 addr = net << IN_CLASSB_NSHIFT; 1065 mask = IN_CLASSC_NET; 1066 } else if (net < 65536) { /* XXX See above */ 1067 addr = net << IN_CLASSB_NSHIFT; 1068 mask = IN_CLASSB_NET; 1069 } else if (net < 14680064L) { /* 224 * 65536 */ 1070 addr = net << IN_CLASSC_NSHIFT; 1071 mask = IN_CLASSC_NET; 1072 } else if (net < 16777216L) { 1073 addr = net << IN_CLASSC_NSHIFT; 1074 mask = IN_CLASSD_NET; 1075 } else { 1076 addr = net; 1077 if ((addr & IN_CLASSA_HOST) == 0) 1078 mask = IN_CLASSA_NET; 1079 else if ((addr & IN_CLASSB_HOST) == 0) 1080 mask = IN_CLASSB_NET; 1081 else if ((addr & IN_CLASSC_HOST) == 0) 1082 mask = IN_CLASSC_NET; 1083 else 1084 mask = -1; 1085 } 1086 isin->sin_addr.s_addr = htonl(addr); 1087 isin = &so_mask.sin; 1088 isin->sin_addr.s_addr = htonl(mask); 1089 isin->sin_len = 0; 1090 isin->sin_family = 0; 1091 cp = (char *)(&isin->sin_addr + 1); 1092 while (*--cp == 0 && cp > (char *)isin) 1093 ; 1094 isin->sin_len = 1 + cp - (char *)isin; 1095} 1096 1097#ifdef INET6 1098/* 1099 * XXX the function may need more improvement... 1100 */ 1101static int 1102inet6_makenetandmask(sin6) 1103 struct sockaddr_in6 *sin6; 1104{ 1105 char *plen; 1106 struct in6_addr in6; 1107 1108 plen = NULL; 1109 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 1110 sin6->sin6_scope_id == 0) { 1111 plen = "0"; 1112 } else if ((sin6->sin6_addr.s6_addr[0] & 0xe0) == 0x20) { 1113 /* aggregatable global unicast - RFC2374 */ 1114 memset(&in6, 0, sizeof(in6)); 1115 if (!memcmp(&sin6->sin6_addr.s6_addr[8], &in6.s6_addr[8], 8)) 1116 plen = "64"; 1117 } 1118 1119 if (!plen || strcmp(plen, "128") == 0) 1120 return 1; 1121 else { 1122 rtm_addrs |= RTA_NETMASK; 1123 (void)prefixlen(plen); 1124 return 0; 1125 } 1126} 1127#endif 1128 1129/* 1130 * Interpret an argument as a network address of some kind, 1131 * returning 1 if a host address, 0 if a network address. 1132 */ 1133static int 1134getaddr(which, s, hpp) 1135 int which; 1136 char *s; 1137 struct hostent **hpp; 1138{ 1139 sup su; 1140 struct hostent *hp; 1141 struct netent *np; 1142 u_int32_t val; 1143 char *t; 1144 int afamily; /* local copy of af so we can change it */ 1145 1146 if (af == 0) { 1147 af = AF_INET; 1148 aflen = sizeof(struct sockaddr_in); 1149 } 1150 afamily = af; 1151 rtm_addrs |= which; 1152 switch (which) { 1153 case RTA_DST: 1154 su = &so_dst; 1155 break; 1156 case RTA_GATEWAY: 1157 su = &so_gate; 1158 break; 1159 case RTA_NETMASK: 1160 su = &so_mask; 1161 break; 1162 case RTA_GENMASK: 1163 su = &so_genmask; 1164 break; 1165 case RTA_IFP: 1166 su = &so_ifp; 1167 afamily = AF_LINK; 1168 break; 1169 case RTA_IFA: 1170 su = &so_ifa; 1171 su->sa.sa_family = af; 1172 break; 1173 default: 1174 su = NULL; 1175 usage("Internal Error"); 1176 /*NOTREACHED*/ 1177 } 1178 su->sa.sa_len = aflen; 1179 su->sa.sa_family = afamily; /* cases that don't want it have left already */ 1180 if (strcmp(s, "default") == 0) { 1181 switch (which) { 1182 case RTA_DST: 1183 forcenet++; 1184 (void) getaddr(RTA_NETMASK, s, 0); 1185 break; 1186 case RTA_NETMASK: 1187 case RTA_GENMASK: 1188 su->sa.sa_len = 0; 1189 } 1190 return (0); 1191 } 1192 switch (afamily) { 1193#ifndef SMALL 1194#ifdef INET6 1195 case AF_INET6: 1196 { 1197 struct addrinfo hints, *res; 1198 1199 memset(&hints, 0, sizeof(hints)); 1200 hints.ai_family = afamily; /*AF_INET6*/ 1201 hints.ai_flags = AI_NUMERICHOST; 1202 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1203 if (getaddrinfo(s, "0", &hints, &res) != 0) { 1204 hints.ai_flags = 0; 1205 if (getaddrinfo(s, "0", &hints, &res) != 0) { 1206 (void) fprintf(stderr, "%s: bad value\n", s); 1207 exit(1); 1208 } 1209 } 1210 if (sizeof(su->sin6) != res->ai_addrlen) { 1211 (void) fprintf(stderr, "%s: bad value\n", s); 1212 exit(1); 1213 } 1214 if (res->ai_next) { 1215 (void) fprintf(stderr, 1216 "%s: resolved to multiple values\n", s); 1217 exit(1); 1218 } 1219 memcpy(&su->sin6, res->ai_addr, sizeof(su->sin6)); 1220 freeaddrinfo(res); 1221#ifdef __KAME__ 1222 if ((IN6_IS_ADDR_LINKLOCAL(&su->sin6.sin6_addr) || 1223 IN6_IS_ADDR_MC_LINKLOCAL(&su->sin6.sin6_addr)) && 1224 su->sin6.sin6_scope_id) { 1225 *(u_int16_t *)&su->sin6.sin6_addr.s6_addr[2] = 1226 htons(su->sin6.sin6_scope_id); 1227 su->sin6.sin6_scope_id = 0; 1228 } 1229#endif 1230 if (hints.ai_flags == AI_NUMERICHOST) { 1231 if (which == RTA_DST) 1232 return (inet6_makenetandmask(&su->sin6)); 1233 return (0); 1234 } else 1235 return (1); 1236 } 1237#endif 1238 1239 case AF_NS: 1240 if (which == RTA_DST) { 1241 struct sockaddr_ns *sms = &(so_mask.sns); 1242 memset(sms, 0, sizeof(*sms)); 1243 sms->sns_family = 0; 1244 sms->sns_len = 6; 1245 sms->sns_addr.x_net = *(union ns_net *)ns_bh; 1246 rtm_addrs |= RTA_NETMASK; 1247 } 1248 su->sns.sns_addr = ns_addr(s); 1249 return (!ns_nullhost(su->sns.sns_addr)); 1250 1251 case AF_OSI: 1252 su->siso.siso_addr = *iso_addr(s); 1253 if (which == RTA_NETMASK || which == RTA_GENMASK) { 1254 char *cp = (char *)TSEL(&su->siso); 1255 su->siso.siso_nlen = 0; 1256 do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); 1257 su->siso.siso_len = 1 + cp - (char *)su; 1258 } 1259 return (1); 1260 1261 case AF_CCITT: 1262 ccitt_addr(s, &su->sx25); 1263 return (which == RTA_DST ? x25_makemask() : 1); 1264#endif /* SMALL */ 1265 1266 case PF_ROUTE: 1267 su->sa.sa_len = sizeof(*su); 1268 sockaddr(s, &su->sa); 1269 return (1); 1270 1271 case AF_APPLETALK: 1272 t = strchr (s, '.'); 1273 if (!t) { 1274badataddr: 1275 errx(1, "bad address: %s", s); 1276 } 1277 val = atoi (s); 1278 if (val > 65535) 1279 goto badataddr; 1280 su->sat.sat_addr.s_net = val; 1281 val = atoi (t); 1282 if (val > 256) 1283 goto badataddr; 1284 su->sat.sat_addr.s_node = val; 1285 rtm_addrs |= RTA_NETMASK; 1286 return(forcehost || su->sat.sat_addr.s_node != 0); 1287 1288 case AF_LINK: 1289 link_addr(s, &su->sdl); 1290 return (1); 1291 1292 case AF_INET: 1293 default: 1294 break; 1295 } 1296 1297 if (hpp == NULL) 1298 hpp = &hp; 1299 *hpp = NULL; 1300 if (((val = inet_addr(s)) != INADDR_NONE) && 1301 (which != RTA_DST || forcenet == 0)) { 1302 su->sin.sin_addr.s_addr = val; 1303 if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) 1304 return (1); 1305 else { 1306 val = ntohl(val); 1307 goto netdone; 1308 } 1309 } 1310 if ((val = inet_network(s)) != INADDR_NONE || 1311 ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) { 1312netdone: 1313 if (which == RTA_DST) 1314 inet_makenetandmask(val, &su->sin); 1315 return (0); 1316 } 1317 hp = gethostbyname(s); 1318 if (hp) { 1319 *hpp = hp; 1320 su->sin.sin_family = hp->h_addrtype; 1321 memmove(&su->sin.sin_addr, hp->h_addr, hp->h_length); 1322 return (1); 1323 } 1324 errx(1, "bad value: %s", s); 1325} 1326 1327int 1328prefixlen(s) 1329 char *s; 1330{ 1331 int len = atoi(s), q, r; 1332 int max; 1333 1334 switch (af) { 1335 case AF_INET: 1336 max = sizeof(struct in_addr) * 8; 1337 break; 1338#ifdef INET6 1339 case AF_INET6: 1340 max = sizeof(struct in6_addr) * 8; 1341 break; 1342#endif 1343 default: 1344 (void) fprintf(stderr, 1345 "prefixlen is not supported with af %d\n", af); 1346 exit(1); 1347 } 1348 1349 rtm_addrs |= RTA_NETMASK; 1350 if (len < -1 || len > max) { 1351 (void) fprintf(stderr, "%s: bad value\n", s); 1352 exit(1); 1353 } 1354 1355 q = len >> 3; 1356 r = len & 7; 1357 switch (af) { 1358 case AF_INET: 1359 memset(&so_mask, 0, sizeof(so_mask)); 1360 so_mask.sin.sin_family = AF_INET; 1361 so_mask.sin.sin_len = sizeof(struct sockaddr_in); 1362 so_mask.sin.sin_addr.s_addr = htonl(0xffffffff << (32 - len)); 1363 break; 1364#ifdef INET6 1365 case AF_INET6: 1366 so_mask.sin6.sin6_family = AF_INET6; 1367 so_mask.sin6.sin6_len = sizeof(struct sockaddr_in6); 1368 memset((void *)&so_mask.sin6.sin6_addr, 0, 1369 sizeof(so_mask.sin6.sin6_addr)); 1370 if (q > 0) 1371 memset((void *)&so_mask.sin6.sin6_addr, 0xff, q); 1372 if (r > 0) 1373 *((u_char *)&so_mask.sin6.sin6_addr + q) = 1374 (0xff00 >> r) & 0xff; 1375 break; 1376#endif 1377 } 1378 return (len == max); 1379} 1380 1381#ifndef SMALL 1382int 1383x25_makemask() 1384{ 1385 char *cp; 1386 1387 if ((rtm_addrs & RTA_NETMASK) == 0) { 1388 rtm_addrs |= RTA_NETMASK; 1389 for (cp = (char *)&so_mask.sx25.x25_net; 1390 cp < &so_mask.sx25.x25_opts.op_flags; cp++) 1391 *cp = -1; 1392 so_mask.sx25.x25_len = (u_char)&(((sup)0)->sx25.x25_opts); 1393 } 1394 return 0; 1395} 1396 1397 1398char * 1399ns_print(sns) 1400 struct sockaddr_ns *sns; 1401{ 1402 struct ns_addr work; 1403 union { union ns_net net_e; u_int32_t int32_t_e; } net; 1404 u_short port; 1405 static char mybuf[50], cport[10], chost[25]; 1406 char *host = ""; 1407 char *p; 1408 u_char *q; 1409 1410 work = sns->sns_addr; 1411 port = ntohs(work.x_port); 1412 work.x_port = 0; 1413 net.net_e = work.x_net; 1414 if (ns_nullhost(work) && net.int32_t_e == 0) { 1415 if (!port) 1416 return ("*.*"); 1417 (void)snprintf(mybuf, sizeof mybuf, "*.%XH", port); 1418 return (mybuf); 1419 } 1420 1421 if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) 1422 host = "any"; 1423 else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) 1424 host = "*"; 1425 else { 1426 q = work.x_host.c_host; 1427 (void)snprintf(chost, sizeof chost, "%02X%02X%02X%02X%02X%02XH", 1428 q[0], q[1], q[2], q[3], q[4], q[5]); 1429 for (p = chost; *p == '0' && p < chost + 12; p++) 1430 /* void */; 1431 host = p; 1432 } 1433 if (port) 1434 (void)snprintf(cport, sizeof cport, ".%XH", htons(port)); 1435 else 1436 *cport = 0; 1437 1438 (void)snprintf(mybuf, sizeof mybuf, "%XH.%s%s", 1439 (u_int32_t)ntohl(net.int32_t_e), host, cport); 1440 return (mybuf); 1441} 1442 1443static void 1444interfaces() 1445{ 1446 size_t needed; 1447 int mib[6]; 1448 char *buf, *lim, *next; 1449 struct rt_msghdr *rtm; 1450 1451 mib[0] = CTL_NET; 1452 mib[1] = PF_ROUTE; 1453 mib[2] = 0; /* protocol */ 1454 mib[3] = 0; /* wildcard address family */ 1455 mib[4] = NET_RT_IFLIST; 1456 mib[5] = 0; /* no flags */ 1457 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 1458 err(1, "route-sysctl-estimate"); 1459 if ((buf = malloc(needed)) == NULL) 1460 err(1, "malloc"); 1461 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) 1462 err(1, "actual retrieval of interface table"); 1463 lim = buf + needed; 1464 for (next = buf; next < lim; next += rtm->rtm_msglen) { 1465 rtm = (struct rt_msghdr *)next; 1466 print_rtmsg(rtm, rtm->rtm_msglen); 1467 } 1468} 1469 1470static void 1471monitor() 1472{ 1473 int n; 1474 char msg[2048]; 1475 1476 verbose = 1; 1477 if (debugonly) { 1478 interfaces(); 1479 exit(0); 1480 } 1481 for(;;) { 1482 time_t now; 1483 n = read(sock, msg, 2048); 1484 now = time(NULL); 1485 (void) printf("got message of size %d on %s", n, ctime(&now)); 1486 print_rtmsg((struct rt_msghdr *)msg, n); 1487 } 1488} 1489 1490#endif /* SMALL */ 1491 1492 1493struct { 1494 struct rt_msghdr m_rtm; 1495 char m_space[512]; 1496} m_rtmsg; 1497 1498static int 1499rtmsg(cmd, flags) 1500 int cmd, flags; 1501{ 1502 static int seq; 1503 int rlen; 1504 char *cp = m_rtmsg.m_space; 1505 int l; 1506 1507#define NEXTADDR(w, u) \ 1508 if (rtm_addrs & (w)) {\ 1509 l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\ 1510 if (verbose && ! shortoutput) sodump(&(u),"u");\ 1511 } 1512 1513 errno = 0; 1514 memset(&m_rtmsg, 0, sizeof(m_rtmsg)); 1515 if (cmd == 'a') 1516 cmd = RTM_ADD; 1517 else if (cmd == 'c') 1518 cmd = RTM_CHANGE; 1519 else if (cmd == 'g') { 1520#ifdef SMALL 1521 return (-1); 1522#else /* SMALL */ 1523 cmd = RTM_GET; 1524 if (so_ifp.sa.sa_family == 0) { 1525 so_ifp.sa.sa_family = AF_LINK; 1526 so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); 1527 rtm_addrs |= RTA_IFP; 1528 } 1529#endif /* SMALL */ 1530 } else 1531 cmd = RTM_DELETE; 1532#define rtm m_rtmsg.m_rtm 1533 rtm.rtm_type = cmd; 1534 rtm.rtm_flags = flags; 1535 rtm.rtm_version = RTM_VERSION; 1536 rtm.rtm_seq = ++seq; 1537 rtm.rtm_addrs = rtm_addrs; 1538 rtm.rtm_rmx = rt_metrics; 1539 rtm.rtm_inits = rtm_inits; 1540 1541 if (rtm_addrs & RTA_NETMASK) 1542 mask_addr(); 1543 NEXTADDR(RTA_DST, so_dst); 1544 NEXTADDR(RTA_GATEWAY, so_gate); 1545 NEXTADDR(RTA_NETMASK, so_mask); 1546 NEXTADDR(RTA_GENMASK, so_genmask); 1547 NEXTADDR(RTA_IFP, so_ifp); 1548 NEXTADDR(RTA_IFA, so_ifa); 1549 rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; 1550 if (verbose && ! shortoutput) 1551 print_rtmsg(&rtm, l); 1552 if (debugonly) 1553 return (0); 1554 if ((rlen = write(sock, (char *)&m_rtmsg, l)) < 0) { 1555 perror("writing to routing socket"); 1556 return (-1); 1557 } 1558#ifndef SMALL 1559 if (cmd == RTM_GET) { 1560 do { 1561 l = read(sock, (char *)&m_rtmsg, sizeof(m_rtmsg)); 1562 } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); 1563 if (l < 0) 1564 err(1, "read from routing socket"); 1565 else 1566 print_getmsg(&rtm, l); 1567 } 1568#endif /* SMALL */ 1569#undef rtm 1570 return (0); 1571} 1572 1573static void 1574mask_addr() 1575{ 1576 int olen = so_mask.sa.sa_len; 1577 char *cp1 = olen + (char *)&so_mask, *cp2; 1578 1579 for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) 1580 if (*--cp1 != 0) { 1581 so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; 1582 break; 1583 } 1584 if ((rtm_addrs & RTA_DST) == 0) 1585 return; 1586 switch (so_dst.sa.sa_family) { 1587 case AF_INET: 1588#ifdef INET6 1589 case AF_INET6: 1590#endif 1591 case AF_APPLETALK: 1592#ifndef SMALL 1593 case AF_NS: 1594 case AF_CCITT: 1595#endif /* SMALL */ 1596 case 0: 1597 return; 1598#ifndef SMALL 1599 case AF_ISO: 1600 olen = MIN(so_dst.siso.siso_nlen, 1601 MAX(so_mask.sa.sa_len - 6, 0)); 1602 break; 1603#endif /* SMALL */ 1604 } 1605 cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; 1606 cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; 1607 while (cp2 > cp1) 1608 *--cp2 = 0; 1609 cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; 1610 while (cp1 > so_dst.sa.sa_data) 1611 *--cp1 &= *--cp2; 1612#ifndef SMALL 1613 switch (so_dst.sa.sa_family) { 1614 case AF_ISO: 1615 so_dst.siso.siso_nlen = olen; 1616 break; 1617 } 1618#endif /* SMALL */ 1619} 1620 1621char *msgtypes[] = { 1622 "", 1623 "RTM_ADD: Add Route", 1624 "RTM_DELETE: Delete Route", 1625 "RTM_CHANGE: Change Metrics or flags", 1626 "RTM_GET: Report Metrics", 1627 "RTM_LOSING: Kernel Suspects Partitioning", 1628 "RTM_REDIRECT: Told to use different route", 1629 "RTM_MISS: Lookup failed on this address", 1630 "RTM_LOCK: fix specified metrics", 1631 "RTM_OLDADD: caused by SIOCADDRT", 1632 "RTM_OLDDEL: caused by SIOCDELRT", 1633 "RTM_RESOLVE: Route created by cloning", 1634 "RTM_NEWADDR: address being added to iface", 1635 "RTM_DELADDR: address being removed from iface", 1636 "RTM_OIFINFO: iface status change (pre-1.5)", 1637 "RTM_IFINFO: iface status change", 1638 "RTM_IFANNOUNCE: iface arrival/departure", 1639 0, 1640}; 1641 1642char metricnames[] = 1643"\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; 1644char routeflags[] = 1645"\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016CLONED\017PROTO2\020PROTO1"; 1646char ifnetflags[] = 1647"\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST"; 1648char addrnames[] = 1649"\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; 1650 1651 1652#ifndef SMALL 1653static const char * 1654linkstate(ifm) 1655 struct if_msghdr *ifm; 1656{ 1657 static char buf[64]; 1658 1659 switch (ifm->ifm_data.ifi_link_state) { 1660 case LINK_STATE_UNKNOWN: 1661 return "carrier: unknown"; 1662 case LINK_STATE_DOWN: 1663 return "carrier: no carrier"; 1664 case LINK_STATE_UP: 1665 return "carrier: active"; 1666 default: 1667 (void)snprintf(buf, sizeof(buf), "carrier: 0x%x", 1668 ifm->ifm_data.ifi_link_state); 1669 return buf; 1670 } 1671} 1672#endif /* SMALL */ 1673 1674static void 1675print_rtmsg(rtm, msglen) 1676 struct rt_msghdr *rtm; 1677 int msglen; 1678{ 1679 struct if_msghdr *ifm; 1680 struct ifa_msghdr *ifam; 1681 struct if_announcemsghdr *ifan; 1682 1683 if (verbose == 0) 1684 return; 1685 if (rtm->rtm_version != RTM_VERSION) { 1686 (void) printf("routing message version %d not understood\n", 1687 rtm->rtm_version); 1688 return; 1689 } 1690 if (msgtypes[rtm->rtm_type]) 1691 (void)printf("%s: ", msgtypes[rtm->rtm_type]); 1692 else 1693 (void)printf("#%d: ", rtm->rtm_type); 1694 (void)printf("len %d, ", rtm->rtm_msglen); 1695 switch (rtm->rtm_type) { 1696 case RTM_IFINFO: 1697 ifm = (struct if_msghdr *)rtm; 1698 (void) printf("if# %d, %s, flags:", ifm->ifm_index, 1699#ifdef SMALL 1700 "" 1701#else 1702 linkstate(ifm) 1703#endif /* SMALL */ 1704 ); 1705 bprintf(stdout, ifm->ifm_flags, ifnetflags); 1706 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); 1707 break; 1708 case RTM_NEWADDR: 1709 case RTM_DELADDR: 1710 ifam = (struct ifa_msghdr *)rtm; 1711 (void) printf("metric %d, flags:", ifam->ifam_metric); 1712 bprintf(stdout, ifam->ifam_flags, routeflags); 1713 pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); 1714 break; 1715 case RTM_IFANNOUNCE: 1716 ifan = (struct if_announcemsghdr *)rtm; 1717 (void) printf("if# %d, what: ", ifan->ifan_index); 1718 switch (ifan->ifan_what) { 1719 case IFAN_ARRIVAL: 1720 printf("arrival"); 1721 break; 1722 case IFAN_DEPARTURE: 1723 printf("departure"); 1724 break; 1725 default: 1726 printf("#%d", ifan->ifan_what); 1727 break; 1728 } 1729 printf("\n"); 1730 break; 1731 default: 1732 (void) printf("pid: %d, seq %d, errno %d, flags:", 1733 rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); 1734 bprintf(stdout, rtm->rtm_flags, routeflags); 1735 pmsg_common(rtm); 1736 } 1737} 1738 1739#ifndef SMALL 1740static void 1741print_getmsg(rtm, msglen) 1742 struct rt_msghdr *rtm; 1743 int msglen; 1744{ 1745 struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL, *ifa = NULL; 1746 struct sockaddr_dl *ifp = NULL; 1747 struct sockaddr *sa; 1748 char *cp; 1749 int i; 1750 1751 if (! shortoutput) 1752 (void) printf(" route to: %s\n", 1753 routename((struct sockaddr *) &so_dst, NULL, RTF_HOST)); 1754 if (rtm->rtm_version != RTM_VERSION) { 1755 warnx("routing message version %d not understood", 1756 rtm->rtm_version); 1757 return; 1758 } 1759 if (rtm->rtm_msglen > msglen) { 1760 warnx("message length mismatch, in packet %d, returned %d", 1761 rtm->rtm_msglen, msglen); 1762 } 1763 if (rtm->rtm_errno) { 1764 warn("RTM_GET"); 1765 return; 1766 } 1767 cp = ((char *)(rtm + 1)); 1768 if (rtm->rtm_addrs) 1769 for (i = 1; i; i <<= 1) 1770 if (i & rtm->rtm_addrs) { 1771 sa = (struct sockaddr *)cp; 1772 switch (i) { 1773 case RTA_DST: 1774 dst = sa; 1775 break; 1776 case RTA_GATEWAY: 1777 gate = sa; 1778 break; 1779 case RTA_NETMASK: 1780 mask = sa; 1781 break; 1782 case RTA_IFP: 1783 if (sa->sa_family == AF_LINK && 1784 ((struct sockaddr_dl *)sa)->sdl_nlen) 1785 ifp = (struct sockaddr_dl *)sa; 1786 break; 1787 case RTA_IFA: 1788 ifa = sa; 1789 break; 1790 } 1791 ADVANCE(cp, sa); 1792 } 1793 if (dst && mask) 1794 mask->sa_family = dst->sa_family; /* XXX */ 1795 if (dst && ! shortoutput) 1796 (void)printf("destination: %s\n", 1797 routename(dst, mask, RTF_HOST)); 1798 if (mask && ! shortoutput) { 1799 int savenflag = nflag; 1800 1801 nflag = 1; 1802 (void)printf(" mask: %s\n", 1803 routename(mask, NULL, RTF_HOST)); 1804 nflag = savenflag; 1805 } 1806 if (gate && rtm->rtm_flags & RTF_GATEWAY && ! shortoutput) 1807 (void)printf(" gateway: %s\n", 1808 routename(gate, NULL, RTF_HOST)); 1809 if (ifa && ! shortoutput) 1810 (void)printf(" local addr: %s\n", 1811 routename(ifa, NULL, RTF_HOST)); 1812 if (ifp && ! shortoutput) 1813 (void)printf(" interface: %.*s\n", 1814 ifp->sdl_nlen, ifp->sdl_data); 1815 if (! shortoutput) { 1816 (void)printf(" flags: "); 1817 bprintf(stdout, rtm->rtm_flags, routeflags); 1818 } 1819 1820#define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') 1821#define msec(u) (((u) + 500) / 1000) /* usec to msec */ 1822 1823 if (! shortoutput) { 1824 (void) printf("\n%s\n", "\ 1825 recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); 1826 printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); 1827 printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); 1828 printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); 1829 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); 1830 printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); 1831 printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); 1832 printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); 1833 if (rtm->rtm_rmx.rmx_expire) 1834 rtm->rtm_rmx.rmx_expire -= time(0); 1835 printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, lock(EXPIRE)); 1836 } 1837#undef lock 1838#undef msec 1839#define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) 1840 1841 if ((rtm->rtm_addrs & RTF_GATEWAY) == 0) 1842 rv = 1; 1843 else { 1844 char *name; 1845 int addrs; 1846 1847 cp = (char *)(rtm + 1); 1848 addrs = rtm->rtm_addrs; 1849 1850 for (i = 1; i; i <<= 1) { 1851 sa = (struct sockaddr *)cp; 1852 if (i == RTF_GATEWAY) { 1853 name = routename(sa, NULL, RTF_HOST); 1854 if (name[0] == '\0') 1855 rv = 1; 1856 else if (shortoutput) 1857 printf("%s\n", name); 1858 } 1859 if (i & addrs) 1860 ADVANCE(cp, sa); 1861 } 1862 } 1863 1864 if (shortoutput) 1865 return; 1866 else if (verbose) 1867 pmsg_common(rtm); 1868 else if (rtm->rtm_addrs &~ RTA_IGN) { 1869 (void) printf("sockaddrs: "); 1870 bprintf(stdout, rtm->rtm_addrs, addrnames); 1871 putchar('\n'); 1872 } 1873#undef RTA_IGN 1874} 1875#endif /* SMALL */ 1876 1877void 1878pmsg_common(rtm) 1879 struct rt_msghdr *rtm; 1880{ 1881 (void) printf("\nlocks: "); 1882 bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); 1883 (void) printf(" inits: "); 1884 bprintf(stdout, rtm->rtm_inits, metricnames); 1885 pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); 1886} 1887 1888static void 1889pmsg_addrs(cp, addrs) 1890 char *cp; 1891 int addrs; 1892{ 1893 struct sockaddr *sa; 1894 int i; 1895 1896 if (addrs != 0) { 1897 (void) printf("\nsockaddrs: "); 1898 bprintf(stdout, addrs, addrnames); 1899 (void) putchar('\n'); 1900 for (i = 1; i; i <<= 1) 1901 if (i & addrs) { 1902 sa = (struct sockaddr *)cp; 1903 (void) printf(" %s", 1904 routename(sa, NULL, RTF_HOST)); 1905 ADVANCE(cp, sa); 1906 } 1907 } 1908 (void) putchar('\n'); 1909 (void) fflush(stdout); 1910} 1911 1912static void 1913bprintf(fp, b, s) 1914 FILE *fp; 1915 int b; 1916 u_char *s; 1917{ 1918 int i; 1919 int gotsome = 0; 1920 1921 if (b == 0) 1922 return; 1923 while ((i = *s++) != 0) { 1924 if (b & (1 << (i-1))) { 1925 if (gotsome == 0) 1926 i = '<'; 1927 else 1928 i = ','; 1929 (void) putc(i, fp); 1930 gotsome = 1; 1931 for (; (i = *s) > 32; s++) 1932 (void) putc(i, fp); 1933 } else 1934 while (*s > 32) 1935 s++; 1936 } 1937 if (gotsome) 1938 (void) putc('>', fp); 1939} 1940 1941static int 1942keyword(cp) 1943 char *cp; 1944{ 1945 struct keytab *kt = keywords; 1946 1947 while (kt->kt_cp && strcmp(kt->kt_cp, cp)) 1948 kt++; 1949 return kt->kt_i; 1950} 1951 1952static void 1953sodump(su, which) 1954 sup su; 1955 char *which; 1956{ 1957#ifdef INET6 1958 char ntop_buf[NI_MAXHOST]; 1959#endif 1960 1961 switch (su->sa.sa_family) { 1962 case AF_INET: 1963 (void) printf("%s: inet %s; ", 1964 which, inet_ntoa(su->sin.sin_addr)); 1965 break; 1966 case AF_APPLETALK: 1967 (void) printf("%s: atalk %d.%d; ", 1968 which, su->sat.sat_addr.s_net, su->sat.sat_addr.s_node); 1969 break; 1970 case AF_LINK: 1971 (void) printf("%s: link %s; ", 1972 which, link_ntoa(&su->sdl)); 1973 break; 1974#ifndef SMALL 1975#ifdef INET6 1976 case AF_INET6: 1977 (void) printf("%s: inet6 %s; ", 1978 which, inet_ntop(AF_INET6, &su->sin6.sin6_addr, 1979 ntop_buf, sizeof(ntop_buf))); 1980 break; 1981#endif 1982 case AF_ISO: 1983 (void) printf("%s: iso %s; ", 1984 which, iso_ntoa(&su->siso.siso_addr)); 1985 break; 1986 case AF_NS: 1987 (void) printf("%s: xns %s; ", 1988 which, ns_ntoa(su->sns.sns_addr)); 1989 break; 1990#endif /* SMALL */ 1991 default: 1992 (void) printf("af %p: %s; ", 1993 which, any_ntoa(&su->sa)); 1994 } 1995 (void) fflush(stdout); 1996} 1997 1998/* States*/ 1999#define VIRGIN 0 2000#define GOTONE 1 2001#define GOTTWO 2 2002/* Inputs */ 2003#define DIGIT (4*0) 2004#define END (4*1) 2005#define DELIM (4*2) 2006 2007static void 2008sockaddr(addr, sa) 2009 char *addr; 2010 struct sockaddr *sa; 2011{ 2012 char *cp = (char *)sa; 2013 int size = sa->sa_len; 2014 char *cplim = cp + size; 2015 int byte = 0, state = VIRGIN, new = 0; 2016 2017 (void) memset(cp, 0, size); 2018 cp++; 2019 do { 2020 if ((*addr >= '0') && (*addr <= '9')) { 2021 new = *addr - '0'; 2022 } else if ((*addr >= 'a') && (*addr <= 'f')) { 2023 new = *addr - 'a' + 10; 2024 } else if ((*addr >= 'A') && (*addr <= 'F')) { 2025 new = *addr - 'A' + 10; 2026 } else if (*addr == 0) 2027 state |= END; 2028 else 2029 state |= DELIM; 2030 addr++; 2031 switch (state /* | INPUT */) { 2032 case GOTTWO | DIGIT: 2033 *cp++ = byte; /*FALLTHROUGH*/ 2034 case VIRGIN | DIGIT: 2035 state = GOTONE; byte = new; continue; 2036 case GOTONE | DIGIT: 2037 state = GOTTWO; byte = new + (byte << 4); continue; 2038 default: /* | DELIM */ 2039 state = VIRGIN; *cp++ = byte; byte = 0; continue; 2040 case GOTONE | END: 2041 case GOTTWO | END: 2042 *cp++ = byte; /* FALLTHROUGH */ 2043 case VIRGIN | END: 2044 break; 2045 } 2046 break; 2047 } while (cp < cplim); 2048 sa->sa_len = cp - (char *)sa; 2049} 2050