summaryrefslogtreecommitdiff
path: root/networking/route.c
blob: 8117b0397409124df30bccdeebfd353027d34f59 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
/* route
 *
 * Similar to the standard Unix route, but with only the necessary
 * parts for AF_INET and AF_INET6
 *
 * Bjorn Wesen, Axis Communications AB
 *
 * Author of the original route:
 *              Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
 *              (derived from FvK's 'route.c     1.70    01/04/94')
 *
 * This program is free software; you can redistribute it
 * and/or  modify it under  the terms of  the GNU General
 * Public  License as  published  by  the  Free  Software
 * Foundation;  either  version 2 of the License, or  (at
 * your option) any later version.
 *
 * $Id: route.c,v 1.20 2002/12/11 03:57:12 andersen Exp $
 *
 * displayroute() code added by Vladimir N. Oleynik <dzo@simtreas.ru>
 * adjustments by Larry Doolittle  <LRDoolittle@lbl.gov>
 *
 * IPV6 support added by Bart Visscher <magick@linux-fan.com>
 */

#include <sys/types.h>
#include <sys/ioctl.h>
#include "inet_common.h"
#include <net/route.h>
#include <net/if.h>
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <unistd.h>
#include <ctype.h>
#include "busybox.h"

#define _(x) x

#define RTACTION_ADD   1
#define RTACTION_DEL   2
#define RTACTION_HELP  3
#define RTACTION_FLUSH 4
#define RTACTION_SHOW  5

#define E_NOTFOUND      8
#define E_SOCK          7
#define E_LOOKUP        6
#define E_VERSION       5
#define E_USAGE         4
#define E_OPTERR        3
#define E_INTERN        2
#define E_NOSUPP        1

#if defined (SIOCADDRTOLD) || defined (RTF_IRTT)	/* route */
#define HAVE_NEW_ADDRT 1
#endif
#ifdef RTF_IRTT			/* route */
#define HAVE_RTF_IRTT 1
#endif
#ifdef RTF_REJECT		/* route */
#define HAVE_RTF_REJECT 1
#endif

#if HAVE_NEW_ADDRT
#define mask_in_addr(x) (((struct sockaddr_in *)&((x).rt_genmask))->sin_addr.s_addr)
#define full_mask(x) (x)
#else
#define mask_in_addr(x) ((x).rt_genmask)
#define full_mask(x) (((struct sockaddr_in *)&(x))->sin_addr.s_addr)
#endif



/* add or delete a route depending on action */

static int INET_setroute(int action, int options, char **args)
{
	struct rtentry rt;
	char target[128], gateway[128] = "NONE";
	const char *netmask = bb_INET_default;
	int xflag, isnet;
	int skfd;

	xflag = 0;

	if (*args == NULL)
		show_usage();
	if (strcmp(*args, "-net") == 0) {
		xflag = 1;
		args++;
	} else if (strcmp(*args, "-host") == 0) {
		xflag = 2;
		args++;
	}
	if (*args == NULL)
		show_usage();
	safe_strncpy(target, *args++, (sizeof target));

	/* Clean out the RTREQ structure. */
	memset((char *) &rt, 0, sizeof(struct rtentry));


	if ((isnet =
		 INET_resolve(target, (struct sockaddr_in *) &rt.rt_dst,
					  xflag != 1)) < 0) {
		error_msg(_("can't resolve %s"), target);
		return EXIT_FAILURE;	/* XXX change to E_something */
	}

	switch (xflag) {
	case 1:
		isnet = 1;
		break;

	case 2:
		isnet = 0;
		break;

	default:
		break;
	}

	/* Fill in the other fields. */
	rt.rt_flags = (RTF_UP | RTF_HOST);
	if (isnet)
		rt.rt_flags &= ~RTF_HOST;

	while (*args) {
		if (strcmp(*args, "metric") == 0) {
			int metric;

			args++;
			if (!*args || !isdigit(**args))
				show_usage();
			metric = atoi(*args);
#if HAVE_NEW_ADDRT
			rt.rt_metric = metric + 1;
#else
			ENOSUPP("inet_setroute", "NEW_ADDRT (metric)");	/* XXX Fixme */
#endif
			args++;
			continue;
		}

		if (strcmp(*args, "netmask") == 0) {
			struct sockaddr mask;

			args++;
			if (!*args || mask_in_addr(rt))
				show_usage();
			netmask = *args;
			if ((isnet =
				 INET_resolve(netmask, (struct sockaddr_in *) &mask,
							  0)) < 0) {
				error_msg(_("can't resolve netmask %s"), netmask);
				return E_LOOKUP;
			}
			rt.rt_genmask = full_mask(mask);
			args++;
			continue;
		}

		if (strcmp(*args, "gw") == 0 || strcmp(*args, "gateway") == 0) {
			args++;
			if (!*args)
				show_usage();
			if (rt.rt_flags & RTF_GATEWAY)
				show_usage();
			safe_strncpy(gateway, *args, (sizeof gateway));
			if ((isnet =
				 INET_resolve(gateway, (struct sockaddr_in *) &rt.rt_gateway,
							  1)) < 0) {
				error_msg(_("can't resolve gw %s"), gateway);
				return E_LOOKUP;
			}
			if (isnet) {
				error_msg(_("%s: cannot use a NETWORK as gateway!"), gateway);
				return E_OPTERR;
			}
			rt.rt_flags |= RTF_GATEWAY;
			args++;
			continue;
		}

		if (strcmp(*args, "mss") == 0) {
			args++;
			rt.rt_flags |= RTF_MSS;
			if (!*args)
				show_usage();
			rt.rt_mss = atoi(*args);
			args++;
			if (rt.rt_mss < 64 || rt.rt_mss > 32768) {
				error_msg(_("Invalid MSS."));
				return E_OPTERR;
			}
			continue;
		}

		if (strcmp(*args, "window") == 0) {
			args++;
			if (!*args)
				show_usage();
			rt.rt_flags |= RTF_WINDOW;
			rt.rt_window = atoi(*args);
			args++;
			if (rt.rt_window < 128) {
				error_msg(_("Invalid window."));
				return E_OPTERR;
			}
			continue;
		}

		if (strcmp(*args, "irtt") == 0) {
			args++;
			if (!*args)
				show_usage();
			args++;
#if HAVE_RTF_IRTT
			rt.rt_flags |= RTF_IRTT;
			rt.rt_irtt = atoi(*(args - 1));
			rt.rt_irtt *= (sysconf(_SC_CLK_TCK) / 100);	/* FIXME */
#if 0					/* FIXME: do we need to check anything of this? */
			if (rt.rt_irtt < 1 || rt.rt_irtt > (120 * HZ)) {
				error_msg(_("Invalid initial rtt."));
				return E_OPTERR;
			}
#endif
#else
			ENOSUPP("inet_setroute", "RTF_IRTT");	/* XXX Fixme */
#endif
			continue;
		}

		if (strcmp(*args, "reject") == 0) {
			args++;
#if HAVE_RTF_REJECT
			rt.rt_flags |= RTF_REJECT;
#else
			ENOSUPP("inet_setroute", "RTF_REJECT");	/* XXX Fixme */
#endif
			continue;
		}
		if (strcmp(*args, "mod") == 0) {
			args++;
			rt.rt_flags |= RTF_MODIFIED;
			continue;
		}
		if (strcmp(*args, "dyn") == 0) {
			args++;
			rt.rt_flags |= RTF_DYNAMIC;
			continue;
		}
		if (strcmp(*args, "reinstate") == 0) {
			args++;
			rt.rt_flags |= RTF_REINSTATE;
			continue;
		}
		if (strcmp(*args, "device") == 0 || strcmp(*args, "dev") == 0) {
			args++;
			if (rt.rt_dev || *args == NULL)
				show_usage();
			rt.rt_dev = *args++;
			continue;
		}
		/* nothing matches */
		if (!rt.rt_dev) {
			rt.rt_dev = *args++;
			if (*args)
				show_usage();	/* must be last to catch typos */
		} else {
			show_usage();
		}
	}

#if HAVE_RTF_REJECT
	if ((rt.rt_flags & RTF_REJECT) && !rt.rt_dev)
		rt.rt_dev = "lo";
#endif

	/* sanity checks.. */
	if (mask_in_addr(rt)) {
		unsigned long mask = mask_in_addr(rt);

		mask = ~ntohl(mask);
		if ((rt.rt_flags & RTF_HOST) && mask != 0xffffffff) {
			error_msg(_("netmask %.8x doesn't make sense with host route"),
					  (unsigned int) mask);
			return E_OPTERR;
		}
		if (mask & (mask + 1)) {
			error_msg(_("bogus netmask %s"), netmask);
			return E_OPTERR;
		}
		mask = ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr;
		if (mask & ~mask_in_addr(rt)) {
			error_msg(_("netmask doesn't match route address"));
			return E_OPTERR;
		}
	}
	/* Fill out netmask if still unset */
	if ((action == RTACTION_ADD) && rt.rt_flags & RTF_HOST)
		mask_in_addr(rt) = 0xffffffff;

	/* Create a socket to the INET kernel. */
	if ((skfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
		perror("socket");
		return E_SOCK;
	}
	/* Tell the kernel to accept this route. */
	if (action == RTACTION_DEL) {
		if (ioctl(skfd, SIOCDELRT, &rt) < 0) {
			perror("SIOCDELRT");
			close(skfd);
			return E_SOCK;
		}
	} else {
		if (ioctl(skfd, SIOCADDRT, &rt) < 0) {
			perror("SIOCADDRT");
			close(skfd);
			return E_SOCK;
		}
	}

	/* Close the socket. */
	(void) close(skfd);
	return EXIT_SUCCESS;
}

#ifdef CONFIG_FEATURE_IPV6
static int INET6_setroute(int action, int options, char **args)
{
	struct in6_rtmsg rt;
	struct ifreq ifr;
	struct sockaddr_in6 sa6;
	char target[128], gateway[128] = "NONE";
	int metric, prefix_len;
	char *devname = NULL;
	char *cp;
	int skfd;

	if (*args == NULL)
		show_usage();

	strcpy(target, *args++);
	if (!strcmp(target, "default")) {
		prefix_len = 0;
		memset(&sa6, 0, sizeof(sa6));
	} else {
		if ((cp = strchr(target, '/'))) {
			prefix_len = atol(cp + 1);
			if ((prefix_len < 0) || (prefix_len > 128))
				show_usage();
			*cp = 0;
		} else {
			prefix_len = 128;
		}
		if (INET6_resolve(target, (struct sockaddr_in6 *) &sa6) < 0) {
			error_msg(_("can't resolve %s"), target);
			return EXIT_FAILURE;	/* XXX change to E_something */
		}
	}

	/* Clean out the RTREQ structure. */
	memset((char *) &rt, 0, sizeof(struct in6_rtmsg));

	memcpy(&rt.rtmsg_dst, sa6.sin6_addr.s6_addr, sizeof(struct in6_addr));

	/* Fill in the other fields. */
	rt.rtmsg_flags = RTF_UP;
	if (prefix_len == 128)
		rt.rtmsg_flags |= RTF_HOST;
	rt.rtmsg_metric = 1;
	rt.rtmsg_dst_len = prefix_len;

	while (*args) {
		if (!strcmp(*args, "metric")) {

			args++;
			if (!*args || !isdigit(**args))
				show_usage();
			metric = atoi(*args);
			rt.rtmsg_metric = metric;
			args++;
			continue;
		}
		if (!strcmp(*args, "gw") || !strcmp(*args, "gateway")) {
			args++;
			if (!*args)
				show_usage();
			if (rt.rtmsg_flags & RTF_GATEWAY)
				show_usage();
			strcpy(gateway, *args);
			if (INET6_resolve(gateway, (struct sockaddr_in6 *) &sa6) < 0) {
				error_msg(_("can't resolve gw %s"), gateway);
				return (E_LOOKUP);
			}
			memcpy(&rt.rtmsg_gateway, sa6.sin6_addr.s6_addr,
				   sizeof(struct in6_addr));
			rt.rtmsg_flags |= RTF_GATEWAY;
			args++;
			continue;
		}
		if (!strcmp(*args, "mod")) {
			args++;
			rt.rtmsg_flags |= RTF_MODIFIED;
			continue;
		}
		if (!strcmp(*args, "dyn")) {
			args++;
			rt.rtmsg_flags |= RTF_DYNAMIC;
			continue;
		}
		if (!strcmp(*args, "device") || !strcmp(*args, "dev")) {
			args++;
			if (!*args)
				show_usage();
		} else if (args[1])
			show_usage();

		devname = *args;
		args++;
	}

	/* Create a socket to the INET6 kernel. */
	if ((skfd = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
		perror("socket");
		return (E_SOCK);
	}
	if (devname) {
		memset(&ifr, 0, sizeof(ifr));
		strcpy(ifr.ifr_name, devname);

		if (ioctl(skfd, SIOGIFINDEX, &ifr) < 0) {
			perror("SIOGIFINDEX");
			return (E_SOCK);
		}
		rt.rtmsg_ifindex = ifr.ifr_ifindex;
	} else
		rt.rtmsg_ifindex = 0;

	/* Tell the kernel to accept this route. */
	if (action == RTACTION_DEL) {
		if (ioctl(skfd, SIOCDELRT, &rt) < 0) {
			perror("SIOCDELRT");
			close(skfd);
			return (E_SOCK);
		}
	} else {
		if (ioctl(skfd, SIOCADDRT, &rt) < 0) {
			perror("SIOCADDRT");
			close(skfd);
			return (E_SOCK);
		}
	}

	/* Close the socket. */
	(void) close(skfd);
	return (0);
}
#endif

#ifndef RTF_UP
/* Keep this in sync with /usr/src/linux/include/linux/route.h */
#define RTF_UP          0x0001	/* route usable                 */
#define RTF_GATEWAY     0x0002	/* destination is a gateway     */
#define RTF_HOST        0x0004	/* host entry (net otherwise)   */
#define RTF_REINSTATE   0x0008	/* reinstate route after tmout  */
#define RTF_DYNAMIC     0x0010	/* created dyn. (by redirect)   */
#define RTF_MODIFIED    0x0020	/* modified dyn. (by redirect)  */
#define RTF_MTU         0x0040	/* specific MTU for this route  */
#ifndef RTF_MSS
#define RTF_MSS         RTF_MTU	/* Compatibility :-(            */
#endif
#define RTF_WINDOW      0x0080	/* per route window clamping    */
#define RTF_IRTT        0x0100	/* Initial round trip time      */
#define RTF_REJECT      0x0200	/* Reject route                 */
#endif

void displayroutes(int noresolve, int netstatfmt)
{
	char buff[256];
	int nl = 0;
	struct in_addr dest;
	struct in_addr gw;
	struct in_addr mask;
	int flgs, ref, use, metric, mtu, win, ir;
	char flags[64];
	unsigned long int d, g, m;

	char sdest[16], sgw[16];

	FILE *fp = xfopen("/proc/net/route", "r");

	if (noresolve)
		noresolve = 0x0fff;

	while (fgets(buff, sizeof(buff), fp) != NULL) {
		if (nl) {
			int ifl = 0;
			int numeric;
			struct sockaddr_in s_addr;

			while (buff[ifl] != ' ' && buff[ifl] != '\t' && buff[ifl] != '\0')
				ifl++;
			buff[ifl] = 0;	/* interface */
			if (sscanf(buff + ifl + 1, "%lx%lx%X%d%d%d%lx%d%d%d",
					   &d, &g, &flgs, &ref, &use, &metric, &m, &mtu, &win,
					   &ir) != 10) {
				error_msg_and_die("Unsuported kernel route format\n");
			}
			if (nl == 1) {
				printf("Kernel IP routing table\n");
				printf
					("Destination     Gateway         Genmask         Flags %s Iface\n",
					 netstatfmt ? "  MSS Window  irtt" : "Metric Ref    Use");
			}
			ifl = 0;	/* parse flags */
			if (flgs & RTF_UP) {
				if (flgs & RTF_REJECT)
					flags[ifl++] = '!';
				else
					flags[ifl++] = 'U';
				if (flgs & RTF_GATEWAY)
					flags[ifl++] = 'G';
				if (flgs & RTF_HOST)
					flags[ifl++] = 'H';
				if (flgs & RTF_REINSTATE)
					flags[ifl++] = 'R';
				if (flgs & RTF_DYNAMIC)
					flags[ifl++] = 'D';
				if (flgs & RTF_MODIFIED)
					flags[ifl++] = 'M';
				flags[ifl] = 0;
				dest.s_addr = d;
				gw.s_addr = g;
				mask.s_addr = m;
				memset(&s_addr, 0, sizeof(struct sockaddr_in));
				s_addr.sin_family = AF_INET;
				s_addr.sin_addr = dest;
				numeric = noresolve | 0x8000;	/* default instead of * */
				INET_rresolve(sdest, sizeof(sdest), &s_addr, numeric, m);
				numeric = noresolve | 0x4000;	/* host instead of net */
				s_addr.sin_addr = gw;
				INET_rresolve(sgw, sizeof(sgw), &s_addr, numeric, m);

				printf("%-16s%-16s%-16s%-6s", sdest, sgw, inet_ntoa(mask),
					   flags);
				if (netstatfmt)
					printf("%5d %-5d %6d %s\n", mtu, win, ir, buff);
				else
					printf("%-6d %-2d %7d %s\n", metric, ref, use, buff);
			}
		}
		nl++;
	}
}

#ifdef CONFIG_FEATURE_IPV6
static void INET6_displayroutes(int noresolve)
{
	char buff[256];
	char iface[16], flags[16];
	char addr6[128], naddr6[128];
	struct sockaddr_in6 saddr6, snaddr6;
	int iflags, metric, refcnt, use, prefix_len, slen;
	int numeric;

	char addr6p[8][5], saddr6p[8][5], naddr6p[8][5];

	FILE *fp = xfopen("/proc/net/ipv6_route", "r");

	flags[0] = 'U';

	if (noresolve)
		noresolve = 0x0fff;
	numeric = noresolve | 0x8000;	/* default instead of * */

	printf("Kernel IPv6 routing table\n"
		   "Destination                                 "
		   "Next Hop                                "
		   "Flags Metric Ref    Use Iface\n");

	while (fgets(buff, sizeof(buff), fp) != NULL) {
		int ifl;

		if (sscanf(buff, "%4s%4s%4s%4s%4s%4s%4s%4s %02x "
				   "%4s%4s%4s%4s%4s%4s%4s%4s %02x "
				   "%4s%4s%4s%4s%4s%4s%4s%4s %08x %08x %08x %08x %s\n",
				   addr6p[0], addr6p[1], addr6p[2], addr6p[3],
				   addr6p[4], addr6p[5], addr6p[6], addr6p[7],
				   &prefix_len,
				   saddr6p[0], saddr6p[1], saddr6p[2], saddr6p[3],
				   saddr6p[4], saddr6p[5], saddr6p[6], saddr6p[7],
				   &slen,
				   naddr6p[0], naddr6p[1], naddr6p[2], naddr6p[3],
				   naddr6p[4], naddr6p[5], naddr6p[6], naddr6p[7],
				   &metric, &use, &refcnt, &iflags, iface) != 31) {
			error_msg_and_die("Unsuported kernel route format\n");
		}

		ifl = 1;		/* parse flags */
		if (!(iflags & RTF_UP))
			continue;
		if (iflags & RTF_GATEWAY)
			flags[ifl++] = 'G';
		if (iflags & RTF_HOST)
			flags[ifl++] = 'H';
		if (iflags & RTF_DEFAULT)
			flags[ifl++] = 'D';
		if (iflags & RTF_ADDRCONF)
			flags[ifl++] = 'A';
		if (iflags & RTF_CACHE)
			flags[ifl++] = 'C';
		flags[ifl] = 0;

		/* Fetch and resolve the target address. */
		snprintf(addr6, sizeof(addr6), "%s:%s:%s:%s:%s:%s:%s:%s",
				 addr6p[0], addr6p[1], addr6p[2], addr6p[3],
				 addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
		inet_pton(AF_INET6, addr6, (struct sockaddr *) &saddr6.sin6_addr);
		saddr6.sin6_family = AF_INET6;

		INET6_rresolve(addr6, sizeof(addr6), (struct sockaddr_in6 *) &saddr6,
					   numeric);
		snprintf(addr6, sizeof(addr6), "%s/%d", addr6, prefix_len);

		/* Fetch and resolve the nexthop address. */
		snprintf(naddr6, sizeof(naddr6), "%s:%s:%s:%s:%s:%s:%s:%s",
				 naddr6p[0], naddr6p[1], naddr6p[2], naddr6p[3],
				 naddr6p[4], naddr6p[5], naddr6p[6], naddr6p[7]);
		inet_pton(AF_INET6, naddr6, (struct sockaddr *) &snaddr6.sin6_addr);
		snaddr6.sin6_family = AF_INET6;

		INET6_rresolve(naddr6, sizeof(naddr6),
					   (struct sockaddr_in6 *) &snaddr6, numeric);

		/* Print the info. */
		printf("%-43s %-39s %-5s %-6d %-2d %7d %-8s\n",
			   addr6, naddr6, flags, metric, refcnt, use, iface);
	}
}
#endif

int route_main(int argc, char **argv)
{
	int opt;
	int what = 0;

#ifdef CONFIG_FEATURE_IPV6
	int af = AF_INET;
#endif

	if (!argv[1] || (argv[1][0] == '-')) {
		/* check options */
		int noresolve = 0;
		int extended = 0;

		while ((opt = getopt(argc, argv, "A:ne")) > 0) {
			switch (opt) {
			case 'n':
				noresolve = 1;
				break;
			case 'e':
				extended = 1;
				break;
			case 'A':
#ifdef CONFIG_FEATURE_IPV6
				if (strcmp(optarg, "inet6") == 0)
					af = AF_INET6;
				break;
#endif
			default:
				show_usage();
			}
		}

#ifdef CONFIG_FEATURE_IPV6
		if (af == AF_INET6)
			INET6_displayroutes(*argv != NULL);
		else
#endif
			displayroutes(noresolve, extended);
		return EXIT_SUCCESS;
	} else {
		/* check verb */
		if (strcmp(argv[1], "add") == 0)
			what = RTACTION_ADD;
		else if (strcmp(argv[1], "del") == 0
				 || strcmp(argv[1], "delete") == 0)
			what = RTACTION_DEL;
		else if (strcmp(argv[1], "flush") == 0)
			what = RTACTION_FLUSH;
		else
			show_usage();
	}

#ifdef CONFIG_FEATURE_IPV6
	if (af == AF_INET6)
		return INET6_setroute(what, 0, argv + 2);
#endif
	return INET_setroute(what, 0, argv + 2);
}