1/* vi: set sw=4 ts=4: */ 2/* route 3 * 4 * Similar to the standard Unix route, but with only the necessary 5 * parts for AF_INET and AF_INET6 6 * 7 * Bjorn Wesen, Axis Communications AB 8 * 9 * Author of the original route: 10 * Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org> 11 * (derived from FvK's 'route.c 1.70 01/04/94') 12 * 13 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. 14 * 15 * 16 * displayroute() code added by Vladimir N. Oleynik <dzo@simtreas.ru> 17 * adjustments by Larry Doolittle <LRDoolittle@lbl.gov> 18 * 19 * IPV6 support added by Bart Visscher <magick@linux-fan.com> 20 */ 21 22/* 2004/03/09 Manuel Novoa III <mjn3@codepoet.org> 23 * 24 * Rewritten to fix several bugs, add additional error checking, and 25 * remove ridiculous amounts of bloat. 26 */ 27 28#include <getopt.h> 29#include <net/route.h> 30#include <net/if.h> 31 32#include "libbb.h" 33#include "inet_common.h" 34 35 36#ifndef RTF_UP 37/* Keep this in sync with /usr/src/linux/include/linux/route.h */ 38#define RTF_UP 0x0001 /* route usable */ 39#define RTF_GATEWAY 0x0002 /* destination is a gateway */ 40#define RTF_HOST 0x0004 /* host entry (net otherwise) */ 41#define RTF_REINSTATE 0x0008 /* reinstate route after tmout */ 42#define RTF_DYNAMIC 0x0010 /* created dyn. (by redirect) */ 43#define RTF_MODIFIED 0x0020 /* modified dyn. (by redirect) */ 44#define RTF_MTU 0x0040 /* specific MTU for this route */ 45#ifndef RTF_MSS 46#define RTF_MSS RTF_MTU /* Compatibility :-( */ 47#endif 48#define RTF_WINDOW 0x0080 /* per route window clamping */ 49#define RTF_IRTT 0x0100 /* Initial round trip time */ 50#define RTF_REJECT 0x0200 /* Reject route */ 51#endif 52 53#if defined(SIOCADDRTOLD) || defined(RTF_IRTT) /* route */ 54#define HAVE_NEW_ADDRT 1 55#endif 56 57#if HAVE_NEW_ADDRT 58#define mask_in_addr(x) (((struct sockaddr_in *)&((x).rt_genmask))->sin_addr.s_addr) 59#define full_mask(x) (x) 60#else 61#define mask_in_addr(x) ((x).rt_genmask) 62#define full_mask(x) (((struct sockaddr_in *)&(x))->sin_addr.s_addr) 63#endif 64 65/* The RTACTION entries must agree with tbl_verb[] below! */ 66#define RTACTION_ADD 1 67#define RTACTION_DEL 2 68 69/* For the various tbl_*[] arrays, the 1st byte is the offset to 70 * the next entry and the 2nd byte is return value. */ 71 72#define NET_FLAG 1 73#define HOST_FLAG 2 74 75/* We remap '-' to '#' to avoid problems with getopt. */ 76static const char tbl_hash_net_host[] ALIGN1 = 77 "\007\001#net\0" 78/* "\010\002#host\0" */ 79 "\007\002#host" /* Since last, we can save a byte. */ 80; 81 82#define KW_TAKES_ARG 020 83#define KW_SETS_FLAG 040 84 85#define KW_IPVx_METRIC 020 86#define KW_IPVx_NETMASK 021 87#define KW_IPVx_GATEWAY 022 88#define KW_IPVx_MSS 023 89#define KW_IPVx_WINDOW 024 90#define KW_IPVx_IRTT 025 91#define KW_IPVx_DEVICE 026 92 93#define KW_IPVx_FLAG_ONLY 040 94#define KW_IPVx_REJECT 040 95#define KW_IPVx_MOD 041 96#define KW_IPVx_DYN 042 97#define KW_IPVx_REINSTATE 043 98 99static const char tbl_ipvx[] ALIGN1 = 100 /* 020 is the "takes an arg" bit */ 101#if HAVE_NEW_ADDRT 102 "\011\020metric\0" 103#endif 104 "\012\021netmask\0" 105 "\005\022gw\0" 106 "\012\022gateway\0" 107 "\006\023mss\0" 108 "\011\024window\0" 109#ifdef RTF_IRTT 110 "\007\025irtt\0" 111#endif 112 "\006\026dev\0" 113 "\011\026device\0" 114 /* 040 is the "sets a flag" bit - MUST match flags_ipvx[] values below. */ 115#ifdef RTF_REJECT 116 "\011\040reject\0" 117#endif 118 "\006\041mod\0" 119 "\006\042dyn\0" 120/* "\014\043reinstate\0" */ 121 "\013\043reinstate" /* Since last, we can save a byte. */ 122; 123 124static const int flags_ipvx[] = { /* MUST match tbl_ipvx[] values above. */ 125#ifdef RTF_REJECT 126 RTF_REJECT, 127#endif 128 RTF_MODIFIED, 129 RTF_DYNAMIC, 130 RTF_REINSTATE 131}; 132 133static int kw_lookup(const char *kwtbl, char ***pargs) 134{ 135 if (**pargs) { 136 do { 137 if (strcmp(kwtbl+2, **pargs) == 0) { /* Found a match. */ 138 *pargs += 1; 139 if (kwtbl[1] & KW_TAKES_ARG) { 140 if (!**pargs) { /* No more args! */ 141 bb_show_usage(); 142 } 143 *pargs += 1; /* Calling routine will use args[-1]. */ 144 } 145 return kwtbl[1]; 146 } 147 kwtbl += *kwtbl; 148 } while (*kwtbl); 149 } 150 return 0; 151} 152 153/* Add or delete a route, depending on action. */ 154 155static void INET_setroute(int action, char **args) 156{ 157 struct rtentry rt; 158 const char *netmask = NULL; 159 int skfd, isnet, xflag; 160 161 /* Grab the -net or -host options. Remember they were transformed. */ 162 xflag = kw_lookup(tbl_hash_net_host, &args); 163 164 /* If we did grab -net or -host, make sure we still have an arg left. */ 165 if (*args == NULL) { 166 bb_show_usage(); 167 } 168 169 /* Clean out the RTREQ structure. */ 170 memset(&rt, 0, sizeof(rt)); 171 172 { 173 const char *target = *args++; 174 char *prefix; 175 176 /* recognize x.x.x.x/mask format. */ 177 prefix = strchr(target, '/'); 178 if (prefix) { 179 int prefix_len; 180 181 prefix_len = xatoul_range(prefix+1, 0, 32); 182 mask_in_addr(rt) = htonl( ~ (0xffffffffUL >> prefix_len)); 183 *prefix = '\0'; 184#if HAVE_NEW_ADDRT 185 rt.rt_genmask.sa_family = AF_INET; 186#endif 187 } else { 188 /* Default netmask. */ 189 netmask = bb_str_default; 190 } 191 /* Prefer hostname lookup is -host flag (xflag==1) was given. */ 192 isnet = INET_resolve(target, (struct sockaddr_in *) &rt.rt_dst, 193 (xflag & HOST_FLAG)); 194 if (isnet < 0) { 195 bb_error_msg_and_die("resolving %s", target); 196 } 197 if (prefix) { 198 /* do not destroy prefix for process args */ 199 *prefix = '/'; 200 } 201 } 202 203 if (xflag) { /* Reinit isnet if -net or -host was specified. */ 204 isnet = (xflag & NET_FLAG); 205 } 206 207 /* Fill in the other fields. */ 208 rt.rt_flags = ((isnet) ? RTF_UP : (RTF_UP | RTF_HOST)); 209 210 while (*args) { 211 int k = kw_lookup(tbl_ipvx, &args); 212 const char *args_m1 = args[-1]; 213 214 if (k & KW_IPVx_FLAG_ONLY) { 215 rt.rt_flags |= flags_ipvx[k & 3]; 216 continue; 217 } 218 219#if HAVE_NEW_ADDRT 220 if (k == KW_IPVx_METRIC) { 221 rt.rt_metric = xatoul(args_m1) + 1; 222 continue; 223 } 224#endif 225 226 if (k == KW_IPVx_NETMASK) { 227 struct sockaddr mask; 228 229 if (mask_in_addr(rt)) { 230 bb_show_usage(); 231 } 232 233 netmask = args_m1; 234 isnet = INET_resolve(netmask, (struct sockaddr_in *) &mask, 0); 235 if (isnet < 0) { 236 bb_error_msg_and_die("resolving %s", netmask); 237 } 238 rt.rt_genmask = full_mask(mask); 239 continue; 240 } 241 242 if (k == KW_IPVx_GATEWAY) { 243 if (rt.rt_flags & RTF_GATEWAY) { 244 bb_show_usage(); 245 } 246 247 isnet = INET_resolve(args_m1, 248 (struct sockaddr_in *) &rt.rt_gateway, 1); 249 rt.rt_flags |= RTF_GATEWAY; 250 251 if (isnet) { 252 if (isnet < 0) { 253 bb_error_msg_and_die("resolving %s", args_m1); 254 } 255 bb_error_msg_and_die("gateway %s is a NETWORK", args_m1); 256 } 257 continue; 258 } 259 260 if (k == KW_IPVx_MSS) { /* Check valid MSS bounds. */ 261 rt.rt_flags |= RTF_MSS; 262 rt.rt_mss = xatoul_range(args_m1, 64, 32768); 263 continue; 264 } 265 266 if (k == KW_IPVx_WINDOW) { /* Check valid window bounds. */ 267 rt.rt_flags |= RTF_WINDOW; 268 rt.rt_window = xatoul_range(args_m1, 128, INT_MAX); 269 continue; 270 } 271 272#ifdef RTF_IRTT 273 if (k == KW_IPVx_IRTT) { 274 rt.rt_flags |= RTF_IRTT; 275 rt.rt_irtt = xatoul(args_m1); 276 rt.rt_irtt *= (sysconf(_SC_CLK_TCK) / 100); 277 continue; 278 } 279#endif 280 281 /* Device is special in that it can be the last arg specified 282 * and doesn't requre the dev/device keyword in that case. */ 283 if (!rt.rt_dev && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) { 284 /* Don't use args_m1 here since args may have changed! */ 285 rt.rt_dev = args[-1]; 286 continue; 287 } 288 289 /* Nothing matched. */ 290 bb_show_usage(); 291 } 292 293#ifdef RTF_REJECT 294 if ((rt.rt_flags & RTF_REJECT) && !rt.rt_dev) { 295 rt.rt_dev = (char*)"lo"; 296 } 297#endif 298 299 /* sanity checks.. */ 300 if (mask_in_addr(rt)) { 301 unsigned long mask = mask_in_addr(rt); 302 303 mask = ~ntohl(mask); 304 if ((rt.rt_flags & RTF_HOST) && mask != 0xffffffff) { 305 bb_error_msg_and_die("netmask %.8x and host route conflict", 306 (unsigned int) mask); 307 } 308 if (mask & (mask + 1)) { 309 bb_error_msg_and_die("bogus netmask %s", netmask); 310 } 311 mask = ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr; 312 if (mask & ~mask_in_addr(rt)) { 313 bb_error_msg_and_die("netmask and route address conflict"); 314 } 315 } 316 317 /* Fill out netmask if still unset */ 318 if ((action == RTACTION_ADD) && (rt.rt_flags & RTF_HOST)) { 319 mask_in_addr(rt) = 0xffffffff; 320 } 321 322 /* Create a socket to the INET kernel. */ 323 skfd = xsocket(AF_INET, SOCK_DGRAM, 0); 324 325 if (action == RTACTION_ADD) 326 xioctl(skfd, SIOCADDRT, &rt); 327 else 328 xioctl(skfd, SIOCDELRT, &rt); 329 330 if (ENABLE_FEATURE_CLEAN_UP) close(skfd); 331} 332 333#if ENABLE_FEATURE_IPV6 334 335static void INET6_setroute(int action, char **args) 336{ 337 struct sockaddr_in6 sa6; 338 struct in6_rtmsg rt; 339 int prefix_len, skfd; 340 const char *devname; 341 342 /* We know args isn't NULL from the check in route_main. */ 343 const char *target = *args++; 344 345 if (strcmp(target, bb_str_default) == 0) { 346 prefix_len = 0; 347 memset(&sa6, 0, sizeof(sa6)); 348 } else { 349 char *cp; 350 if ((cp = strchr(target, '/'))) { /* Yes... const to non is ok. */ 351 *cp = 0; 352 prefix_len = xatoul_range(cp+1, 0, 128); 353 } else { 354 prefix_len = 128; 355 } 356 if (INET6_resolve(target, (struct sockaddr_in6 *) &sa6) < 0) { 357 bb_error_msg_and_die("resolving %s", target); 358 } 359 } 360 361 /* Clean out the RTREQ structure. */ 362 memset(&rt, 0, sizeof(rt)); 363 364 memcpy(&rt.rtmsg_dst, sa6.sin6_addr.s6_addr, sizeof(struct in6_addr)); 365 366 /* Fill in the other fields. */ 367 rt.rtmsg_dst_len = prefix_len; 368 rt.rtmsg_flags = ((prefix_len == 128) ? (RTF_UP|RTF_HOST) : RTF_UP); 369 rt.rtmsg_metric = 1; 370 371 devname = NULL; 372 373 while (*args) { 374 int k = kw_lookup(tbl_ipvx, &args); 375 const char *args_m1 = args[-1]; 376 377 if ((k == KW_IPVx_MOD) || (k == KW_IPVx_DYN)) { 378 rt.rtmsg_flags |= flags_ipvx[k & 3]; 379 continue; 380 } 381 382 if (k == KW_IPVx_METRIC) { 383 rt.rtmsg_metric = xatoul(args_m1); 384 continue; 385 } 386 387 if (k == KW_IPVx_GATEWAY) { 388 if (rt.rtmsg_flags & RTF_GATEWAY) { 389 bb_show_usage(); 390 } 391 392 if (INET6_resolve(args_m1, (struct sockaddr_in6 *) &sa6) < 0) { 393 bb_error_msg_and_die("resolving %s", args_m1); 394 } 395 memcpy(&rt.rtmsg_gateway, sa6.sin6_addr.s6_addr, 396 sizeof(struct in6_addr)); 397 rt.rtmsg_flags |= RTF_GATEWAY; 398 continue; 399 } 400 401 /* Device is special in that it can be the last arg specified 402 * and doesn't requre the dev/device keyword in that case. */ 403 if (!devname && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) { 404 /* Don't use args_m1 here since args may have changed! */ 405 devname = args[-1]; 406 continue; 407 } 408 409 /* Nothing matched. */ 410 bb_show_usage(); 411 } 412 413 /* Create a socket to the INET6 kernel. */ 414 skfd = xsocket(AF_INET6, SOCK_DGRAM, 0); 415 416 rt.rtmsg_ifindex = 0; 417 418 if (devname) { 419 struct ifreq ifr; 420 memset(&ifr, 0, sizeof(ifr)); 421 strncpy(ifr.ifr_name, devname, sizeof(ifr.ifr_name)); 422 xioctl(skfd, SIOGIFINDEX, &ifr); 423 rt.rtmsg_ifindex = ifr.ifr_ifindex; 424 } 425 426 /* Tell the kernel to accept this route. */ 427 if (action == RTACTION_ADD) 428 xioctl(skfd, SIOCADDRT, &rt); 429 else 430 xioctl(skfd, SIOCDELRT, &rt); 431 432 if (ENABLE_FEATURE_CLEAN_UP) close(skfd); 433} 434#endif 435 436static const unsigned flagvals[] = { /* Must agree with flagchars[]. */ 437 RTF_GATEWAY, 438 RTF_HOST, 439 RTF_REINSTATE, 440 RTF_DYNAMIC, 441 RTF_MODIFIED, 442#if ENABLE_FEATURE_IPV6 443 RTF_DEFAULT, 444 RTF_ADDRCONF, 445 RTF_CACHE 446#endif 447}; 448 449#define IPV4_MASK (RTF_GATEWAY|RTF_HOST|RTF_REINSTATE|RTF_DYNAMIC|RTF_MODIFIED) 450#define IPV6_MASK (RTF_GATEWAY|RTF_HOST|RTF_DEFAULT|RTF_ADDRCONF|RTF_CACHE) 451 452/* Must agree with flagvals[]. */ 453static const char flagchars[] ALIGN1 = 454 "GHRDM" 455#if ENABLE_FEATURE_IPV6 456 "DAC" 457#endif 458; 459 460static void set_flags(char *flagstr, int flags) 461{ 462 int i; 463 464 *flagstr++ = 'U'; 465 466 for (i = 0; (*flagstr = flagchars[i]) != 0; i++) { 467 if (flags & flagvals[i]) { 468 ++flagstr; 469 } 470 } 471} 472 473/* also used in netstat */ 474void bb_displayroutes(int noresolve, int netstatfmt) 475{ 476 char devname[64], flags[16], *sdest, *sgw; 477 unsigned long d, g, m; 478 int flgs, ref, use, metric, mtu, win, ir; 479 struct sockaddr_in s_addr; 480 struct in_addr mask; 481 482 FILE *fp = xfopen("/proc/net/route", "r"); 483 484 printf("Kernel IP routing table\n" 485 "Destination Gateway Genmask Flags %s Iface\n", 486 netstatfmt ? " MSS Window irtt" : "Metric Ref Use"); 487 488 if (fscanf(fp, "%*[^\n]\n") < 0) { /* Skip the first line. */ 489 goto ERROR; /* Empty or missing line, or read error. */ 490 } 491 while (1) { 492 int r; 493 r = fscanf(fp, "%63s%lx%lx%X%d%d%d%lx%d%d%d\n", 494 devname, &d, &g, &flgs, &ref, &use, &metric, &m, 495 &mtu, &win, &ir); 496 if (r != 11) { 497 if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */ 498 break; 499 } 500 ERROR: 501 bb_error_msg_and_die("fscanf"); 502 } 503 504 if (!(flgs & RTF_UP)) { /* Skip interfaces that are down. */ 505 continue; 506 } 507 508 set_flags(flags, (flgs & IPV4_MASK)); 509#ifdef RTF_REJECT 510 if (flgs & RTF_REJECT) { 511 flags[0] = '!'; 512 } 513#endif 514 515 memset(&s_addr, 0, sizeof(struct sockaddr_in)); 516 s_addr.sin_family = AF_INET; 517 s_addr.sin_addr.s_addr = d; 518 sdest = INET_rresolve(&s_addr, (noresolve | 0x8000), m); /* 'default' instead of '*' */ 519 s_addr.sin_addr.s_addr = g; 520 sgw = INET_rresolve(&s_addr, (noresolve | 0x4000), m); /* Host instead of net */ 521 mask.s_addr = m; 522 /* "%15.15s" truncates hostnames, do we really want that? */ 523 printf("%-15.15s %-15.15s %-16s%-6s", sdest, sgw, inet_ntoa(mask), flags); 524 free(sdest); 525 free(sgw); 526 if (netstatfmt) { 527 printf("%5d %-5d %6d %s\n", mtu, win, ir, devname); 528 } else { 529 printf("%-6d %-2d %7d %s\n", metric, ref, use, devname); 530 } 531 } 532} 533 534#if ENABLE_FEATURE_IPV6 535 536static void INET6_displayroutes(int noresolve) 537{ 538 char addr6[128], *naddr6; 539 /* In addr6x, we store both 40-byte ':'-delimited ipv6 addresses. 540 * We read the non-delimited strings into the tail of the buffer 541 * using fscanf and then modify the buffer by shifting forward 542 * while inserting ':'s and the nul terminator for the first string. 543 * Hence the strings are at addr6x and addr6x+40. This generates 544 * _much_ less code than the previous (upstream) approach. */ 545 char addr6x[80]; 546 char iface[16], flags[16]; 547 int iflags, metric, refcnt, use, prefix_len, slen; 548 struct sockaddr_in6 snaddr6; 549 550 FILE *fp = xfopen("/proc/net/ipv6_route", "r"); 551 552 printf("Kernel IPv6 routing table\n%-44s%-40s" 553 "Flags Metric Ref Use Iface\n", 554 "Destination", "Next Hop"); 555 556 while (1) { 557 int r; 558 r = fscanf(fp, "%32s%x%*s%x%32s%x%x%x%x%s\n", 559 addr6x+14, &prefix_len, &slen, addr6x+40+7, 560 &metric, &use, &refcnt, &iflags, iface); 561 if (r != 9) { 562 if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */ 563 break; 564 } 565 ERROR: 566 bb_error_msg_and_die("fscanf"); 567 } 568 569 /* Do the addr6x shift-and-insert changes to ':'-delimit addresses. 570 * For now, always do this to validate the proc route format, even 571 * if the interface is down. */ 572 { 573 int i = 0; 574 char *p = addr6x+14; 575 576 do { 577 if (!*p) { 578 if (i == 40) { /* nul terminator for 1st address? */ 579 addr6x[39] = 0; /* Fixup... need 0 instead of ':'. */ 580 ++p; /* Skip and continue. */ 581 continue; 582 } 583 goto ERROR; 584 } 585 addr6x[i++] = *p++; 586 if (!((i+1) % 5)) { 587 addr6x[i++] = ':'; 588 } 589 } while (i < 40+28+7); 590 } 591 592 if (!(iflags & RTF_UP)) { /* Skip interfaces that are down. */ 593 continue; 594 } 595 596 set_flags(flags, (iflags & IPV6_MASK)); 597 598 r = 0; 599 do { 600 inet_pton(AF_INET6, addr6x + r, 601 (struct sockaddr *) &snaddr6.sin6_addr); 602 snaddr6.sin6_family = AF_INET6; 603 naddr6 = INET6_rresolve((struct sockaddr_in6 *) &snaddr6, 604 0x0fff /* Apparently, upstream never resolves. */ 605 ); 606 607 if (!r) { /* 1st pass */ 608 snprintf(addr6, sizeof(addr6), "%s/%d", naddr6, prefix_len); 609 r += 40; 610 free(naddr6); 611 } else { /* 2nd pass */ 612 /* Print the info. */ 613 printf("%-43s %-39s %-5s %-6d %-2d %7d %-8s\n", 614 addr6, naddr6, flags, metric, refcnt, use, iface); 615 free(naddr6); 616 break; 617 } 618 } while (1); 619 } 620} 621 622#endif 623 624#define ROUTE_OPT_A 0x01 625#define ROUTE_OPT_n 0x02 626#define ROUTE_OPT_e 0x04 627#define ROUTE_OPT_INET6 0x08 /* Not an actual option. See below. */ 628 629/* 1st byte is offset to next entry offset. 2nd byte is return value. */ 630/* 2nd byte matches RTACTION_* code */ 631static const char tbl_verb[] ALIGN1 = 632 "\006\001add\0" 633 "\006\002del\0" 634/* "\011\002delete\0" */ 635 "\010\002delete" /* Since it's last, we can save a byte. */ 636; 637 638int route_main(int argc, char **argv); 639int route_main(int argc, char **argv) 640{ 641 unsigned opt; 642 int what; 643 char *family; 644 char **p; 645 646 /* First, remap '-net' and '-host' to avoid getopt problems. */ 647 p = argv; 648 while (*++p) { 649 if (strcmp(*p, "-net") == 0 || strcmp(*p, "-host") == 0) { 650 p[0][0] = '#'; 651 } 652 } 653 654 opt = getopt32(argv, "A:ne", &family); 655 656 if ((opt & ROUTE_OPT_A) && strcmp(family, "inet") != 0) { 657#if ENABLE_FEATURE_IPV6 658 if (strcmp(family, "inet6") == 0) { 659 opt |= ROUTE_OPT_INET6; /* Set flag for ipv6. */ 660 } else 661#endif 662 bb_show_usage(); 663 } 664 665 argv += optind; 666 667 /* No more args means display the routing table. */ 668 if (!*argv) { 669 int noresolve = (opt & ROUTE_OPT_n) ? 0x0fff : 0; 670#if ENABLE_FEATURE_IPV6 671 if (opt & ROUTE_OPT_INET6) 672 INET6_displayroutes(noresolve); 673 else 674#endif 675 bb_displayroutes(noresolve, opt & ROUTE_OPT_e); 676 677 fflush_stdout_and_exit(EXIT_SUCCESS); 678 } 679 680 /* Check verb. At the moment, must be add, del, or delete. */ 681 what = kw_lookup(tbl_verb, &argv); 682 if (!what || !*argv) { /* Unknown verb or no more args. */ 683 bb_show_usage(); 684 } 685 686#if ENABLE_FEATURE_IPV6 687 if (opt & ROUTE_OPT_INET6) 688 INET6_setroute(what, argv); 689 else 690#endif 691 INET_setroute(what, argv); 692 693 return EXIT_SUCCESS; 694} 695