source: MondoRescue/branches/3.2/mindi-busybox/networking/route.c@ 3232

Last change on this file since 3232 was 3232, checked in by Bruno Cornec, 10 years ago
  • Update mindi-busybox to 1.21.1
File size: 17.7 KB
Line 
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 source tree.
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//usage:#define route_trivial_usage
29//usage: "[{add|del|delete}]"
30//usage:#define route_full_usage "\n\n"
31//usage: "Edit kernel routing tables\n"
32//usage: "\n -n Don't resolve names"
33//usage: "\n -e Display other/more information"
34//usage: "\n -A inet" IF_FEATURE_IPV6("{6}") " Select address family"
35
36#include <net/route.h>
37#include <net/if.h>
38
39#include "libbb.h"
40#include "inet_common.h"
41
42
43#ifndef RTF_UP
44/* Keep this in sync with /usr/src/linux/include/linux/route.h */
45#define RTF_UP 0x0001 /* route usable */
46#define RTF_GATEWAY 0x0002 /* destination is a gateway */
47#define RTF_HOST 0x0004 /* host entry (net otherwise) */
48#define RTF_REINSTATE 0x0008 /* reinstate route after tmout */
49#define RTF_DYNAMIC 0x0010 /* created dyn. (by redirect) */
50#define RTF_MODIFIED 0x0020 /* modified dyn. (by redirect) */
51#define RTF_MTU 0x0040 /* specific MTU for this route */
52#ifndef RTF_MSS
53#define RTF_MSS RTF_MTU /* Compatibility :-( */
54#endif
55#define RTF_WINDOW 0x0080 /* per route window clamping */
56#define RTF_IRTT 0x0100 /* Initial round trip time */
57#define RTF_REJECT 0x0200 /* Reject route */
58#endif
59
60#if defined(SIOCADDRTOLD) || defined(RTF_IRTT) /* route */
61#define HAVE_NEW_ADDRT 1
62#endif
63
64#if HAVE_NEW_ADDRT
65#define mask_in_addr(x) (((struct sockaddr_in *)&((x).rt_genmask))->sin_addr.s_addr)
66#define full_mask(x) (x)
67#else
68#define mask_in_addr(x) ((x).rt_genmask)
69#define full_mask(x) (((struct sockaddr_in *)&(x))->sin_addr.s_addr)
70#endif
71
72/* The RTACTION entries must agree with tbl_verb[] below! */
73#define RTACTION_ADD 1
74#define RTACTION_DEL 2
75
76/* For the various tbl_*[] arrays, the 1st byte is the offset to
77 * the next entry and the 2nd byte is return value. */
78
79#define NET_FLAG 1
80#define HOST_FLAG 2
81
82/* We remap '-' to '#' to avoid problems with getopt. */
83static const char tbl_hash_net_host[] ALIGN1 =
84 "\007\001#net\0"
85/* "\010\002#host\0" */
86 "\007\002#host" /* Since last, we can save a byte. */
87;
88
89#define KW_TAKES_ARG 020
90#define KW_SETS_FLAG 040
91
92#define KW_IPVx_METRIC 020
93#define KW_IPVx_NETMASK 021
94#define KW_IPVx_GATEWAY 022
95#define KW_IPVx_MSS 023
96#define KW_IPVx_WINDOW 024
97#define KW_IPVx_IRTT 025
98#define KW_IPVx_DEVICE 026
99
100#define KW_IPVx_FLAG_ONLY 040
101#define KW_IPVx_REJECT 040
102#define KW_IPVx_MOD 041
103#define KW_IPVx_DYN 042
104#define KW_IPVx_REINSTATE 043
105
106static const char tbl_ipvx[] ALIGN1 =
107 /* 020 is the "takes an arg" bit */
108#if HAVE_NEW_ADDRT
109 "\011\020metric\0"
110#endif
111 "\012\021netmask\0"
112 "\005\022gw\0"
113 "\012\022gateway\0"
114 "\006\023mss\0"
115 "\011\024window\0"
116#ifdef RTF_IRTT
117 "\007\025irtt\0"
118#endif
119 "\006\026dev\0"
120 "\011\026device\0"
121 /* 040 is the "sets a flag" bit - MUST match flags_ipvx[] values below. */
122#ifdef RTF_REJECT
123 "\011\040reject\0"
124#endif
125 "\006\041mod\0"
126 "\006\042dyn\0"
127/* "\014\043reinstate\0" */
128 "\013\043reinstate" /* Since last, we can save a byte. */
129;
130
131static const int flags_ipvx[] = { /* MUST match tbl_ipvx[] values above. */
132#ifdef RTF_REJECT
133 RTF_REJECT,
134#endif
135 RTF_MODIFIED,
136 RTF_DYNAMIC,
137 RTF_REINSTATE
138};
139
140static int kw_lookup(const char *kwtbl, char ***pargs)
141{
142 if (**pargs) {
143 do {
144 if (strcmp(kwtbl+2, **pargs) == 0) { /* Found a match. */
145 *pargs += 1;
146 if (kwtbl[1] & KW_TAKES_ARG) {
147 if (!**pargs) { /* No more args! */
148 bb_show_usage();
149 }
150 *pargs += 1; /* Calling routine will use args[-1]. */
151 }
152 return kwtbl[1];
153 }
154 kwtbl += *kwtbl;
155 } while (*kwtbl);
156 }
157 return 0;
158}
159
160/* Add or delete a route, depending on action. */
161
162static NOINLINE void INET_setroute(int action, char **args)
163{
164 /* char buffer instead of bona-fide struct avoids aliasing warning */
165 char rt_buf[sizeof(struct rtentry)];
166 struct rtentry *const rt = (void *)rt_buf;
167
168 const char *netmask = NULL;
169 int skfd, isnet, xflag;
170
171 /* Grab the -net or -host options. Remember they were transformed. */
172 xflag = kw_lookup(tbl_hash_net_host, &args);
173
174 /* If we did grab -net or -host, make sure we still have an arg left. */
175 if (*args == NULL) {
176 bb_show_usage();
177 }
178
179 /* Clean out the RTREQ structure. */
180 memset(rt, 0, sizeof(*rt));
181
182 {
183 const char *target = *args++;
184 char *prefix;
185
186 /* recognize x.x.x.x/mask format. */
187 prefix = strchr(target, '/');
188 if (prefix) {
189 int prefix_len;
190
191 prefix_len = xatoul_range(prefix+1, 0, 32);
192 mask_in_addr(*rt) = htonl( ~(0xffffffffUL >> prefix_len));
193 *prefix = '\0';
194#if HAVE_NEW_ADDRT
195 rt->rt_genmask.sa_family = AF_INET;
196#endif
197 } else {
198 /* Default netmask. */
199 netmask = "default";
200 }
201 /* Prefer hostname lookup is -host flag (xflag==1) was given. */
202 isnet = INET_resolve(target, (struct sockaddr_in *) &rt->rt_dst,
203 (xflag & HOST_FLAG));
204 if (isnet < 0) {
205 bb_error_msg_and_die("resolving %s", target);
206 }
207 if (prefix) {
208 /* do not destroy prefix for process args */
209 *prefix = '/';
210 }
211 }
212
213 if (xflag) { /* Reinit isnet if -net or -host was specified. */
214 isnet = (xflag & NET_FLAG);
215 }
216
217 /* Fill in the other fields. */
218 rt->rt_flags = ((isnet) ? RTF_UP : (RTF_UP | RTF_HOST));
219
220 while (*args) {
221 int k = kw_lookup(tbl_ipvx, &args);
222 const char *args_m1 = args[-1];
223
224 if (k & KW_IPVx_FLAG_ONLY) {
225 rt->rt_flags |= flags_ipvx[k & 3];
226 continue;
227 }
228
229#if HAVE_NEW_ADDRT
230 if (k == KW_IPVx_METRIC) {
231 rt->rt_metric = xatoul(args_m1) + 1;
232 continue;
233 }
234#endif
235
236 if (k == KW_IPVx_NETMASK) {
237 struct sockaddr mask;
238
239 if (mask_in_addr(*rt)) {
240 bb_show_usage();
241 }
242
243 netmask = args_m1;
244 isnet = INET_resolve(netmask, (struct sockaddr_in *) &mask, 0);
245 if (isnet < 0) {
246 bb_error_msg_and_die("resolving %s", netmask);
247 }
248 rt->rt_genmask = full_mask(mask);
249 continue;
250 }
251
252 if (k == KW_IPVx_GATEWAY) {
253 if (rt->rt_flags & RTF_GATEWAY) {
254 bb_show_usage();
255 }
256
257 isnet = INET_resolve(args_m1,
258 (struct sockaddr_in *) &rt->rt_gateway, 1);
259 rt->rt_flags |= RTF_GATEWAY;
260
261 if (isnet) {
262 if (isnet < 0) {
263 bb_error_msg_and_die("resolving %s", args_m1);
264 }
265 bb_error_msg_and_die("gateway %s is a NETWORK", args_m1);
266 }
267 continue;
268 }
269
270 if (k == KW_IPVx_MSS) { /* Check valid MSS bounds. */
271 rt->rt_flags |= RTF_MSS;
272 rt->rt_mss = xatoul_range(args_m1, 64, 32768);
273 continue;
274 }
275
276 if (k == KW_IPVx_WINDOW) { /* Check valid window bounds. */
277 rt->rt_flags |= RTF_WINDOW;
278 rt->rt_window = xatoul_range(args_m1, 128, INT_MAX);
279 continue;
280 }
281
282#ifdef RTF_IRTT
283 if (k == KW_IPVx_IRTT) {
284 rt->rt_flags |= RTF_IRTT;
285 rt->rt_irtt = xatoul(args_m1);
286 rt->rt_irtt *= (sysconf(_SC_CLK_TCK) / 100); /* FIXME */
287#if 0 /* FIXME: do we need to check anything of this? */
288 if (rt->rt_irtt < 1 || rt->rt_irtt > (120 * HZ)) {
289 bb_error_msg_and_die("bad irtt");
290 }
291#endif
292 continue;
293 }
294#endif
295
296 /* Device is special in that it can be the last arg specified
297 * and doesn't requre the dev/device keyword in that case. */
298 if (!rt->rt_dev && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) {
299 /* Don't use args_m1 here since args may have changed! */
300 rt->rt_dev = args[-1];
301 continue;
302 }
303
304 /* Nothing matched. */
305 bb_show_usage();
306 }
307
308#ifdef RTF_REJECT
309 if ((rt->rt_flags & RTF_REJECT) && !rt->rt_dev) {
310 rt->rt_dev = (char*)"lo";
311 }
312#endif
313
314 /* sanity checks.. */
315 if (mask_in_addr(*rt)) {
316 uint32_t mask = mask_in_addr(*rt);
317
318 mask = ~ntohl(mask);
319 if ((rt->rt_flags & RTF_HOST) && mask != 0xffffffff) {
320 bb_error_msg_and_die("netmask %.8x and host route conflict",
321 (unsigned int) mask);
322 }
323 if (mask & (mask + 1)) {
324 bb_error_msg_and_die("bogus netmask %s", netmask);
325 }
326 mask = ((struct sockaddr_in *) &rt->rt_dst)->sin_addr.s_addr;
327 if (mask & ~(uint32_t)mask_in_addr(*rt)) {
328 bb_error_msg_and_die("netmask and route address conflict");
329 }
330 }
331
332 /* Fill out netmask if still unset */
333 if ((action == RTACTION_ADD) && (rt->rt_flags & RTF_HOST)) {
334 mask_in_addr(*rt) = 0xffffffff;
335 }
336
337 /* Create a socket to the INET kernel. */
338 skfd = xsocket(AF_INET, SOCK_DGRAM, 0);
339
340 if (action == RTACTION_ADD)
341 xioctl(skfd, SIOCADDRT, rt);
342 else
343 xioctl(skfd, SIOCDELRT, rt);
344
345 if (ENABLE_FEATURE_CLEAN_UP) close(skfd);
346}
347
348#if ENABLE_FEATURE_IPV6
349
350static NOINLINE void INET6_setroute(int action, char **args)
351{
352 struct sockaddr_in6 sa6;
353 struct in6_rtmsg rt;
354 int prefix_len, skfd;
355 const char *devname;
356
357 /* We know args isn't NULL from the check in route_main. */
358 const char *target = *args++;
359
360 if (strcmp(target, "default") == 0) {
361 prefix_len = 0;
362 memset(&sa6, 0, sizeof(sa6));
363 } else {
364 char *cp;
365 cp = strchr(target, '/'); /* Yes... const to non is ok. */
366 if (cp) {
367 *cp = '\0';
368 prefix_len = xatoul_range(cp + 1, 0, 128);
369 } else {
370 prefix_len = 128;
371 }
372 if (INET6_resolve(target, (struct sockaddr_in6 *) &sa6) < 0) {
373 bb_error_msg_and_die("resolving %s", target);
374 }
375 }
376
377 /* Clean out the RTREQ structure. */
378 memset(&rt, 0, sizeof(rt));
379
380 memcpy(&rt.rtmsg_dst, sa6.sin6_addr.s6_addr, sizeof(struct in6_addr));
381
382 /* Fill in the other fields. */
383 rt.rtmsg_dst_len = prefix_len;
384 rt.rtmsg_flags = ((prefix_len == 128) ? (RTF_UP|RTF_HOST) : RTF_UP);
385 rt.rtmsg_metric = 1;
386
387 devname = NULL;
388
389 while (*args) {
390 int k = kw_lookup(tbl_ipvx, &args);
391 const char *args_m1 = args[-1];
392
393 if ((k == KW_IPVx_MOD) || (k == KW_IPVx_DYN)) {
394 rt.rtmsg_flags |= flags_ipvx[k & 3];
395 continue;
396 }
397
398 if (k == KW_IPVx_METRIC) {
399 rt.rtmsg_metric = xatoul(args_m1);
400 continue;
401 }
402
403 if (k == KW_IPVx_GATEWAY) {
404 if (rt.rtmsg_flags & RTF_GATEWAY) {
405 bb_show_usage();
406 }
407
408 if (INET6_resolve(args_m1, (struct sockaddr_in6 *) &sa6) < 0) {
409 bb_error_msg_and_die("resolving %s", args_m1);
410 }
411 memcpy(&rt.rtmsg_gateway, sa6.sin6_addr.s6_addr,
412 sizeof(struct in6_addr));
413 rt.rtmsg_flags |= RTF_GATEWAY;
414 continue;
415 }
416
417 /* Device is special in that it can be the last arg specified
418 * and doesn't requre the dev/device keyword in that case. */
419 if (!devname && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) {
420 /* Don't use args_m1 here since args may have changed! */
421 devname = args[-1];
422 continue;
423 }
424
425 /* Nothing matched. */
426 bb_show_usage();
427 }
428
429 /* Create a socket to the INET6 kernel. */
430 skfd = xsocket(AF_INET6, SOCK_DGRAM, 0);
431
432 rt.rtmsg_ifindex = 0;
433
434 if (devname) {
435 struct ifreq ifr;
436 memset(&ifr, 0, sizeof(ifr));
437 strncpy_IFNAMSIZ(ifr.ifr_name, devname);
438 xioctl(skfd, SIOCGIFINDEX, &ifr);
439 rt.rtmsg_ifindex = ifr.ifr_ifindex;
440 }
441
442 /* Tell the kernel to accept this route. */
443 if (action == RTACTION_ADD)
444 xioctl(skfd, SIOCADDRT, &rt);
445 else
446 xioctl(skfd, SIOCDELRT, &rt);
447
448 if (ENABLE_FEATURE_CLEAN_UP) close(skfd);
449}
450#endif
451
452static const unsigned flagvals[] = { /* Must agree with flagchars[]. */
453 RTF_GATEWAY,
454 RTF_HOST,
455 RTF_REINSTATE,
456 RTF_DYNAMIC,
457 RTF_MODIFIED,
458#if ENABLE_FEATURE_IPV6
459 RTF_DEFAULT,
460 RTF_ADDRCONF,
461 RTF_CACHE
462#endif
463};
464
465#define IPV4_MASK (RTF_GATEWAY|RTF_HOST|RTF_REINSTATE|RTF_DYNAMIC|RTF_MODIFIED)
466#define IPV6_MASK (RTF_GATEWAY|RTF_HOST|RTF_DEFAULT|RTF_ADDRCONF|RTF_CACHE)
467
468/* Must agree with flagvals[]. */
469static const char flagchars[] ALIGN1 =
470 "GHRDM"
471#if ENABLE_FEATURE_IPV6
472 "DAC"
473#endif
474;
475
476static void set_flags(char *flagstr, int flags)
477{
478 int i;
479
480 *flagstr++ = 'U';
481
482 for (i = 0; (*flagstr = flagchars[i]) != 0; i++) {
483 if (flags & flagvals[i]) {
484 ++flagstr;
485 }
486 }
487}
488
489/* also used in netstat */
490void FAST_FUNC bb_displayroutes(int noresolve, int netstatfmt)
491{
492 char devname[64], flags[16], *sdest, *sgw;
493 unsigned long d, g, m;
494 int flgs, ref, use, metric, mtu, win, ir;
495 struct sockaddr_in s_addr;
496 struct in_addr mask;
497
498 FILE *fp = xfopen_for_read("/proc/net/route");
499
500 printf("Kernel IP routing table\n"
501 "Destination Gateway Genmask Flags %s Iface\n",
502 netstatfmt ? " MSS Window irtt" : "Metric Ref Use");
503
504 if (fscanf(fp, "%*[^\n]\n") < 0) { /* Skip the first line. */
505 goto ERROR; /* Empty or missing line, or read error. */
506 }
507 while (1) {
508 int r;
509 r = fscanf(fp, "%63s%lx%lx%X%d%d%d%lx%d%d%d\n",
510 devname, &d, &g, &flgs, &ref, &use, &metric, &m,
511 &mtu, &win, &ir);
512 if (r != 11) {
513 if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */
514 break;
515 }
516 ERROR:
517 bb_error_msg_and_die("fscanf");
518 }
519
520 if (!(flgs & RTF_UP)) { /* Skip interfaces that are down. */
521 continue;
522 }
523
524 set_flags(flags, (flgs & IPV4_MASK));
525#ifdef RTF_REJECT
526 if (flgs & RTF_REJECT) {
527 flags[0] = '!';
528 }
529#endif
530
531 memset(&s_addr, 0, sizeof(struct sockaddr_in));
532 s_addr.sin_family = AF_INET;
533 s_addr.sin_addr.s_addr = d;
534 sdest = INET_rresolve(&s_addr, (noresolve | 0x8000), m); /* 'default' instead of '*' */
535 s_addr.sin_addr.s_addr = g;
536 sgw = INET_rresolve(&s_addr, (noresolve | 0x4000), m); /* Host instead of net */
537 mask.s_addr = m;
538 /* "%15.15s" truncates hostnames, do we really want that? */
539 printf("%-15.15s %-15.15s %-16s%-6s", sdest, sgw, inet_ntoa(mask), flags);
540 free(sdest);
541 free(sgw);
542 if (netstatfmt) {
543 printf("%5d %-5d %6d %s\n", mtu, win, ir, devname);
544 } else {
545 printf("%-6d %-2d %7d %s\n", metric, ref, use, devname);
546 }
547 }
548 fclose(fp);
549}
550
551#if ENABLE_FEATURE_IPV6
552
553static void INET6_displayroutes(void)
554{
555 char addr6[128], *naddr6;
556 /* In addr6x, we store both 40-byte ':'-delimited ipv6 addresses.
557 * We read the non-delimited strings into the tail of the buffer
558 * using fscanf and then modify the buffer by shifting forward
559 * while inserting ':'s and the nul terminator for the first string.
560 * Hence the strings are at addr6x and addr6x+40. This generates
561 * _much_ less code than the previous (upstream) approach. */
562 char addr6x[80];
563 char iface[16], flags[16];
564 int iflags, metric, refcnt, use, prefix_len, slen;
565 struct sockaddr_in6 snaddr6;
566
567 FILE *fp = xfopen_for_read("/proc/net/ipv6_route");
568
569 printf("Kernel IPv6 routing table\n%-44s%-40s"
570 "Flags Metric Ref Use Iface\n",
571 "Destination", "Next Hop");
572
573 while (1) {
574 int r;
575 r = fscanf(fp, "%32s%x%*s%x%32s%x%x%x%x%s\n",
576 addr6x+14, &prefix_len, &slen, addr6x+40+7,
577 &metric, &use, &refcnt, &iflags, iface);
578 if (r != 9) {
579 if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */
580 break;
581 }
582 ERROR:
583 bb_error_msg_and_die("fscanf");
584 }
585
586 /* Do the addr6x shift-and-insert changes to ':'-delimit addresses.
587 * For now, always do this to validate the proc route format, even
588 * if the interface is down. */
589 {
590 int i = 0;
591 char *p = addr6x+14;
592
593 do {
594 if (!*p) {
595 if (i == 40) { /* nul terminator for 1st address? */
596 addr6x[39] = 0; /* Fixup... need 0 instead of ':'. */
597 ++p; /* Skip and continue. */
598 continue;
599 }
600 goto ERROR;
601 }
602 addr6x[i++] = *p++;
603 if (!((i+1) % 5)) {
604 addr6x[i++] = ':';
605 }
606 } while (i < 40+28+7);
607 }
608
609 if (!(iflags & RTF_UP)) { /* Skip interfaces that are down. */
610 continue;
611 }
612
613 set_flags(flags, (iflags & IPV6_MASK));
614
615 r = 0;
616 while (1) {
617 inet_pton(AF_INET6, addr6x + r,
618 (struct sockaddr *) &snaddr6.sin6_addr);
619 snaddr6.sin6_family = AF_INET6;
620 naddr6 = INET6_rresolve((struct sockaddr_in6 *) &snaddr6,
621 0x0fff /* Apparently, upstream never resolves. */
622 );
623
624 if (!r) { /* 1st pass */
625 snprintf(addr6, sizeof(addr6), "%s/%d", naddr6, prefix_len);
626 r += 40;
627 free(naddr6);
628 } else { /* 2nd pass */
629 /* Print the info. */
630 printf("%-43s %-39s %-5s %-6d %-2d %7d %-8s\n",
631 addr6, naddr6, flags, metric, refcnt, use, iface);
632 free(naddr6);
633 break;
634 }
635 }
636 }
637 fclose(fp);
638}
639
640#endif
641
642#define ROUTE_OPT_A 0x01
643#define ROUTE_OPT_n 0x02
644#define ROUTE_OPT_e 0x04
645#define ROUTE_OPT_INET6 0x08 /* Not an actual option. See below. */
646
647/* 1st byte is offset to next entry offset. 2nd byte is return value. */
648/* 2nd byte matches RTACTION_* code */
649static const char tbl_verb[] ALIGN1 =
650 "\006\001add\0"
651 "\006\002del\0"
652/* "\011\002delete\0" */
653 "\010\002delete" /* Since it's last, we can save a byte. */
654;
655
656int route_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
657int route_main(int argc UNUSED_PARAM, char **argv)
658{
659 unsigned opt;
660 int what;
661 char *family;
662 char **p;
663
664 /* First, remap '-net' and '-host' to avoid getopt problems. */
665 p = argv;
666 while (*++p) {
667 if (strcmp(*p, "-net") == 0 || strcmp(*p, "-host") == 0) {
668 p[0][0] = '#';
669 }
670 }
671
672 opt = getopt32(argv, "A:ne", &family);
673
674 if ((opt & ROUTE_OPT_A) && strcmp(family, "inet") != 0) {
675#if ENABLE_FEATURE_IPV6
676 if (strcmp(family, "inet6") == 0) {
677 opt |= ROUTE_OPT_INET6; /* Set flag for ipv6. */
678 } else
679#endif
680 bb_show_usage();
681 }
682
683 argv += optind;
684
685 /* No more args means display the routing table. */
686 if (!*argv) {
687 int noresolve = (opt & ROUTE_OPT_n) ? 0x0fff : 0;
688#if ENABLE_FEATURE_IPV6
689 if (opt & ROUTE_OPT_INET6)
690 INET6_displayroutes();
691 else
692#endif
693 bb_displayroutes(noresolve, opt & ROUTE_OPT_e);
694
695 fflush_stdout_and_exit(EXIT_SUCCESS);
696 }
697
698 /* Check verb. At the moment, must be add, del, or delete. */
699 what = kw_lookup(tbl_verb, &argv);
700 if (!what || !*argv) { /* Unknown verb or no more args. */
701 bb_show_usage();
702 }
703
704#if ENABLE_FEATURE_IPV6
705 if (opt & ROUTE_OPT_INET6)
706 INET6_setroute(what, argv);
707 else
708#endif
709 INET_setroute(what, argv);
710
711 return EXIT_SUCCESS;
712}
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