source: MondoRescue/trunk/mindi-busybox/networking/route.c@ 904

Last change on this file since 904 was 821, checked in by Bruno Cornec, 18 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)
File size: 17.8 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 tarball for details.
14 *
15 * $Id: route.c,v 1.26 2004/03/19 23:27:08 mjn3 Exp $
16 *
17 * displayroute() code added by Vladimir N. Oleynik <dzo@simtreas.ru>
18 * adjustments by Larry Doolittle <LRDoolittle@lbl.gov>
19 *
20 * IPV6 support added by Bart Visscher <magick@linux-fan.com>
21 */
22
23/* 2004/03/09 Manuel Novoa III <mjn3@codepoet.org>
24 *
25 * Rewritten to fix several bugs, add additional error checking, and
26 * remove ridiculous amounts of bloat.
27 */
28
29#include <stdio.h>
30#include <stdlib.h>
31#include <string.h>
32#include <errno.h>
33#include <assert.h>
34#include <unistd.h>
35#include <fcntl.h>
36#include <getopt.h>
37#include <sys/types.h>
38#include <sys/ioctl.h>
39#include <net/route.h>
40#include <net/if.h>
41#include "busybox.h"
42#include "inet_common.h"
43
44#ifndef RTF_UP
45/* Keep this in sync with /usr/src/linux/include/linux/route.h */
46#define RTF_UP 0x0001 /* route usable */
47#define RTF_GATEWAY 0x0002 /* destination is a gateway */
48#define RTF_HOST 0x0004 /* host entry (net otherwise) */
49#define RTF_REINSTATE 0x0008 /* reinstate route after tmout */
50#define RTF_DYNAMIC 0x0010 /* created dyn. (by redirect) */
51#define RTF_MODIFIED 0x0020 /* modified dyn. (by redirect) */
52#define RTF_MTU 0x0040 /* specific MTU for this route */
53#ifndef RTF_MSS
54#define RTF_MSS RTF_MTU /* Compatibility :-( */
55#endif
56#define RTF_WINDOW 0x0080 /* per route window clamping */
57#define RTF_IRTT 0x0100 /* Initial round trip time */
58#define RTF_REJECT 0x0200 /* Reject route */
59#endif
60
61#if defined (SIOCADDRTOLD) || defined (RTF_IRTT) /* route */
62#define HAVE_NEW_ADDRT 1
63#endif
64
65#if HAVE_NEW_ADDRT
66#define mask_in_addr(x) (((struct sockaddr_in *)&((x).rt_genmask))->sin_addr.s_addr)
67#define full_mask(x) (x)
68#else
69#define mask_in_addr(x) ((x).rt_genmask)
70#define full_mask(x) (((struct sockaddr_in *)&(x))->sin_addr.s_addr)
71#endif
72
73/* The RTACTION entries must agree with tbl_verb[] below! */
74#define RTACTION_ADD 1
75#define RTACTION_DEL 2
76
77/* For the various tbl_*[] arrays, the 1st byte is the offset to
78 * the next entry and the 2nd byte is return value. */
79
80#define NET_FLAG 1
81#define HOST_FLAG 2
82
83/* We remap '-' to '#' to avoid problems with getopt. */
84static const char tbl_hash_net_host[] =
85 "\007\001#net\0"
86/* "\010\002#host\0" */
87 "\007\002#host" /* Since last, we can save a byte. */
88;
89
90#define KW_TAKES_ARG 020
91#define KW_SETS_FLAG 040
92
93#define KW_IPVx_METRIC 020
94#define KW_IPVx_NETMASK 021
95#define KW_IPVx_GATEWAY 022
96#define KW_IPVx_MSS 023
97#define KW_IPVx_WINDOW 024
98#define KW_IPVx_IRTT 025
99#define KW_IPVx_DEVICE 026
100
101#define KW_IPVx_FLAG_ONLY 040
102#define KW_IPVx_REJECT 040
103#define KW_IPVx_MOD 041
104#define KW_IPVx_DYN 042
105#define KW_IPVx_REINSTATE 043
106
107static const char tbl_ipvx[] =
108 /* 020 is the "takes an arg" bit */
109#if HAVE_NEW_ADDRT
110 "\011\020metric\0"
111#endif
112 "\012\021netmask\0"
113 "\005\022gw\0"
114 "\012\022gateway\0"
115 "\006\023mss\0"
116 "\011\024window\0"
117#ifdef RTF_IRTT
118 "\007\025irtt\0"
119#endif
120 "\006\026dev\0"
121 "\011\026device\0"
122 /* 040 is the "sets a flag" bit - MUST match flags_ipvx[] values below. */
123#ifdef RTF_REJECT
124 "\011\040reject\0"
125#endif
126 "\006\041mod\0"
127 "\006\042dyn\0"
128/* "\014\043reinstate\0" */
129 "\013\043reinstate" /* Since last, we can save a byte. */
130;
131
132static const int flags_ipvx[] = { /* MUST match tbl_ipvx[] values above. */
133#ifdef RTF_REJECT
134 RTF_REJECT,
135#endif
136 RTF_MODIFIED,
137 RTF_DYNAMIC,
138 RTF_REINSTATE
139};
140
141static int kw_lookup(const char *kwtbl, char ***pargs)
142{
143 if (**pargs) {
144 do {
145 if (strcmp(kwtbl+2, **pargs) == 0) { /* Found a match. */
146 *pargs += 1;
147 if (kwtbl[1] & KW_TAKES_ARG) {
148 if (!**pargs) { /* No more args! */
149 bb_show_usage();
150 }
151 *pargs += 1; /* Calling routine will use args[-1]. */
152 }
153 return kwtbl[1];
154 }
155 kwtbl += *kwtbl;
156 } while (*kwtbl);
157 }
158 return 0;
159}
160
161/* Add or delete a route, depending on action. */
162
163static void INET_setroute(int action, char **args)
164{
165 struct rtentry rt;
166 const char *netmask = NULL;
167 int skfd, isnet, xflag;
168
169 assert((action == RTACTION_ADD) || (action == RTACTION_DEL));
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((char *) &rt, 0, sizeof(struct rtentry));
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 = bb_xgetularg10_bnd(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 = bb_INET_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 = bb_xgetularg10(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 = bb_xgetularg10_bnd(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 = bb_xgetularg10_bnd(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 = bb_xgetularg10(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 = "lo";
311 }
312#endif
313
314 /* sanity checks.. */
315 if (mask_in_addr(rt)) {
316 unsigned long 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 & ~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 = bb_xsocket(AF_INET, SOCK_DGRAM, 0);
339
340 if (ioctl(skfd, ((action==RTACTION_ADD) ? SIOCADDRT : SIOCDELRT), &rt)<0) {
341 bb_perror_msg_and_die("SIOC[ADD|DEL]RT");
342 }
343
344 if (ENABLE_FEATURE_CLEAN_UP) close(skfd);
345}
346
347#ifdef CONFIG_FEATURE_IPV6
348
349static void INET6_setroute(int action, char **args)
350{
351 struct sockaddr_in6 sa6;
352 struct in6_rtmsg rt;
353 int prefix_len, skfd;
354 const char *devname;
355
356 assert((action == RTACTION_ADD) || (action == RTACTION_DEL));
357
358 {
359 /* We know args isn't NULL from the check in route_main. */
360 const char *target = *args++;
361
362 if (strcmp(target, bb_INET_default) == 0) {
363 prefix_len = 0;
364 memset(&sa6, 0, sizeof(sa6));
365 } else {
366 char *cp;
367 if ((cp = strchr(target, '/'))) { /* Yes... const to non is ok. */
368 *cp = 0;
369 prefix_len = bb_xgetularg10_bnd(cp+1, 0, 128);
370 } else {
371 prefix_len = 128;
372 }
373 if (INET6_resolve(target, (struct sockaddr_in6 *) &sa6) < 0) {
374 bb_error_msg_and_die("resolving %s", target);
375 }
376 }
377 }
378
379 /* Clean out the RTREQ structure. */
380 memset((char *) &rt, 0, sizeof(struct in6_rtmsg));
381
382 memcpy(&rt.rtmsg_dst, sa6.sin6_addr.s6_addr, sizeof(struct in6_addr));
383
384 /* Fill in the other fields. */
385 rt.rtmsg_dst_len = prefix_len;
386 rt.rtmsg_flags = ((prefix_len == 128) ? (RTF_UP|RTF_HOST) : RTF_UP);
387 rt.rtmsg_metric = 1;
388
389 devname = NULL;
390
391 while (*args) {
392 int k = kw_lookup(tbl_ipvx, &args);
393 const char *args_m1 = args[-1];
394
395 if ((k == KW_IPVx_MOD) || (k == KW_IPVx_DYN)) {
396 rt.rtmsg_flags |= flags_ipvx[k & 3];
397 continue;
398 }
399
400 if (k == KW_IPVx_METRIC) {
401 rt.rtmsg_metric = bb_xgetularg10(args_m1);
402 continue;
403 }
404
405 if (k == KW_IPVx_GATEWAY) {
406 if (rt.rtmsg_flags & RTF_GATEWAY) {
407 bb_show_usage();
408 }
409
410 if (INET6_resolve(args_m1, (struct sockaddr_in6 *) &sa6) < 0) {
411 bb_error_msg_and_die("resolving %s", args_m1);
412 }
413 memcpy(&rt.rtmsg_gateway, sa6.sin6_addr.s6_addr,
414 sizeof(struct in6_addr));
415 rt.rtmsg_flags |= RTF_GATEWAY;
416 continue;
417 }
418
419 /* Device is special in that it can be the last arg specified
420 * and doesn't requre the dev/device keyword in that case. */
421 if (!devname && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) {
422 /* Don't use args_m1 here since args may have changed! */
423 devname = args[-1];
424 continue;
425 }
426
427 /* Nothing matched. */
428 bb_show_usage();
429 }
430
431 /* Create a socket to the INET6 kernel. */
432 skfd = bb_xsocket(AF_INET6, SOCK_DGRAM, 0);
433
434 rt.rtmsg_ifindex = 0;
435
436 if (devname) {
437 struct ifreq ifr;
438 memset(&ifr, 0, sizeof(ifr));
439 strcpy(ifr.ifr_name, devname);
440
441 if (ioctl(skfd, SIOGIFINDEX, &ifr) < 0) {
442 bb_perror_msg_and_die("SIOGIFINDEX");
443 }
444 rt.rtmsg_ifindex = ifr.ifr_ifindex;
445 }
446
447 /* Tell the kernel to accept this route. */
448 if (ioctl(skfd, ((action==RTACTION_ADD) ? SIOCADDRT : SIOCDELRT), &rt)<0) {
449 bb_perror_msg_and_die("SIOC[ADD|DEL]RT");
450 }
451
452 if (ENABLE_FEATURE_CLEAN_UP) close(skfd);
453}
454#endif
455
456static const unsigned int flagvals[] = { /* Must agree with flagchars[]. */
457 RTF_GATEWAY,
458 RTF_HOST,
459 RTF_REINSTATE,
460 RTF_DYNAMIC,
461 RTF_MODIFIED,
462#ifdef CONFIG_FEATURE_IPV6
463 RTF_DEFAULT,
464 RTF_ADDRCONF,
465 RTF_CACHE
466#endif
467};
468
469#define IPV4_MASK (RTF_GATEWAY|RTF_HOST|RTF_REINSTATE|RTF_DYNAMIC|RTF_MODIFIED)
470#define IPV6_MASK (RTF_GATEWAY|RTF_HOST|RTF_DEFAULT|RTF_ADDRCONF|RTF_CACHE)
471
472static const char flagchars[] = /* Must agree with flagvals[]. */
473 "GHRDM"
474#ifdef CONFIG_FEATURE_IPV6
475 "DAC"
476#endif
477;
478
479static
480#ifndef CONFIG_FEATURE_IPV6
481__inline
482#endif
483void set_flags(char *flagstr, int flags)
484{
485 int i;
486
487 *flagstr++ = 'U';
488
489 for (i=0 ; (*flagstr = flagchars[i]) != 0 ; i++) {
490 if (flags & flagvals[i]) {
491 ++flagstr;
492 }
493 }
494}
495
496/* also used in netstat */
497void displayroutes(int noresolve, int netstatfmt);
498void displayroutes(int noresolve, int netstatfmt)
499{
500 char devname[64], flags[16], sdest[16], sgw[16];
501 unsigned long int d, g, m;
502 int flgs, ref, use, metric, mtu, win, ir;
503 struct sockaddr_in s_addr;
504 struct in_addr mask;
505
506 FILE *fp = bb_xfopen("/proc/net/route", "r");
507
508 bb_printf("Kernel IP routing table\n"
509 "Destination Gateway Genmask"
510 " Flags %s Iface\n",
511 netstatfmt ? " MSS Window irtt" : "Metric Ref Use");
512
513 if (fscanf(fp, "%*[^\n]\n") < 0) { /* Skip the first line. */
514 goto ERROR; /* Empty or missing line, or read error. */
515 }
516 while (1) {
517 int r;
518 r = fscanf(fp, "%63s%lx%lx%X%d%d%d%lx%d%d%d\n",
519 devname, &d, &g, &flgs, &ref, &use, &metric, &m,
520 &mtu, &win, &ir);
521 if (r != 11) {
522 if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */
523 break;
524 }
525 ERROR:
526 bb_error_msg_and_die("fscanf");
527 }
528
529 if (!(flgs & RTF_UP)) { /* Skip interfaces that are down. */
530 continue;
531 }
532
533 set_flags(flags, (flgs & IPV4_MASK));
534#ifdef RTF_REJECT
535 if (flgs & RTF_REJECT) {
536 flags[0] = '!';
537 }
538#endif
539
540 memset(&s_addr, 0, sizeof(struct sockaddr_in));
541 s_addr.sin_family = AF_INET;
542 s_addr.sin_addr.s_addr = d;
543 INET_rresolve(sdest, sizeof(sdest), &s_addr,
544 (noresolve | 0x8000), m); /* Default instead of *. */
545
546 s_addr.sin_addr.s_addr = g;
547 INET_rresolve(sgw, sizeof(sgw), &s_addr,
548 (noresolve | 0x4000), m); /* Host instead of net. */
549
550 mask.s_addr = m;
551 bb_printf("%-16s%-16s%-16s%-6s", sdest, sgw, inet_ntoa(mask), flags);
552 if (netstatfmt) {
553 bb_printf("%5d %-5d %6d %s\n", mtu, win, ir, devname);
554 } else {
555 bb_printf("%-6d %-2d %7d %s\n", metric, ref, use, devname);
556 }
557 }
558}
559
560#ifdef CONFIG_FEATURE_IPV6
561
562static void INET6_displayroutes(int noresolve)
563{
564 char addr6[128], naddr6[128];
565 /* In addr6x, we store both 40-byte ':'-delimited ipv6 addresses.
566 * We read the non-delimited strings into the tail of the buffer
567 * using fscanf and then modify the buffer by shifting forward
568 * while inserting ':'s and the nul terminator for the first string.
569 * Hence the strings are at addr6x and addr6x+40. This generates
570 * _much_ less code than the previous (upstream) approach. */
571 char addr6x[80];
572 char iface[16], flags[16];
573 int iflags, metric, refcnt, use, prefix_len, slen;
574 struct sockaddr_in6 snaddr6;
575
576 FILE *fp = bb_xfopen("/proc/net/ipv6_route", "r");
577
578 bb_printf("Kernel IPv6 routing table\n%-44s%-40s"
579 "Flags Metric Ref Use Iface\n",
580 "Destination", "Next Hop");
581
582 while (1) {
583 int r;
584 r = fscanf(fp, "%32s%x%*s%x%32s%x%x%x%x%s\n",
585 addr6x+14, &prefix_len, &slen, addr6x+40+7,
586 &metric, &use, &refcnt, &iflags, iface);
587 if (r != 9) {
588 if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */
589 break;
590 }
591 ERROR:
592 bb_error_msg_and_die("fscanf");
593 }
594
595 /* Do the addr6x shift-and-insert changes to ':'-delimit addresses.
596 * For now, always do this to validate the proc route format, even
597 * if the interface is down. */
598 {
599 int i = 0;
600 char *p = addr6x+14;
601
602 do {
603 if (!*p) {
604 if (i==40) { /* nul terminator for 1st address? */
605 addr6x[39] = 0; /* Fixup... need 0 instead of ':'. */
606 ++p; /* Skip and continue. */
607 continue;
608 }
609 goto ERROR;
610 }
611 addr6x[i++] = *p++;
612 if (!((i+1)%5)) {
613 addr6x[i++] = ':';
614 }
615 } while (i < 40+28+7);
616 }
617
618 if (!(iflags & RTF_UP)) { /* Skip interfaces that are down. */
619 continue;
620 }
621
622 set_flags(flags, (iflags & IPV6_MASK));
623
624 r = 0;
625 do {
626 inet_pton(AF_INET6, addr6x + r,
627 (struct sockaddr *) &snaddr6.sin6_addr);
628 snaddr6.sin6_family = AF_INET6;
629 INET6_rresolve(naddr6, sizeof(naddr6),
630 (struct sockaddr_in6 *) &snaddr6,
631#if 0
632 (noresolve | 0x8000) /* Default instead of *. */
633#else
634 0x0fff /* Apparently, upstream never resolves. */
635#endif
636 );
637
638 if (!r) { /* 1st pass */
639 snprintf(addr6, sizeof(addr6), "%s/%d", naddr6, prefix_len);
640 r += 40;
641 } else { /* 2nd pass */
642 /* Print the info. */
643 bb_printf("%-43s %-39s %-5s %-6d %-2d %7d %-8s\n",
644 addr6, naddr6, flags, metric, refcnt, use, iface);
645 break;
646 }
647 } while (1);
648 }
649}
650
651#endif
652
653#define ROUTE_OPT_A 0x01
654#define ROUTE_OPT_n 0x02
655#define ROUTE_OPT_e 0x04
656#define ROUTE_OPT_INET6 0x08 /* Not an actual option. See below. */
657
658/* 1st byte is offset to next entry offset. 2nd byte is return value. */
659static const char tbl_verb[] = /* 2nd byte matches RTACTION_* code */
660 "\006\001add\0"
661 "\006\002del\0"
662/* "\011\002delete\0" */
663 "\010\002delete" /* Since last, we can save a byte. */
664;
665
666int route_main(int argc, char **argv)
667{
668 unsigned long opt;
669 int what;
670 char *family;
671
672 /* First, remap '-net' and '-host' to avoid getopt problems. */
673 {
674 char **p = argv;
675
676 while (*++p) {
677 if ((strcmp(*p, "-net") == 0) || (strcmp(*p, "-host") == 0)) {
678 p[0][0] = '#';
679 }
680 }
681 }
682
683 opt = bb_getopt_ulflags(argc, argv, "A:ne", &family);
684
685 if ((opt & ROUTE_OPT_A) && strcmp(family, "inet")) {
686#ifdef CONFIG_FEATURE_IPV6
687 if (strcmp(family, "inet6") == 0) {
688 opt |= ROUTE_OPT_INET6; /* Set flag for ipv6. */
689 } else
690#endif
691 bb_show_usage();
692 }
693
694 argv += optind;
695
696 /* No more args means display the routing table. */
697 if (!*argv) {
698 int noresolve = (opt & ROUTE_OPT_n) ? 0x0fff : 0;
699#ifdef CONFIG_FEATURE_IPV6
700 if (opt & ROUTE_OPT_INET6)
701 INET6_displayroutes(noresolve);
702 else
703#endif
704 displayroutes(noresolve, opt & ROUTE_OPT_e);
705
706 bb_xferror_stdout();
707 bb_fflush_stdout_and_exit(EXIT_SUCCESS);
708 }
709
710 /* Check verb. At the moment, must be add, del, or delete. */
711 what = kw_lookup(tbl_verb, &argv);
712 if (!what || !*argv) { /* Unknown verb or no more args. */
713 bb_show_usage();
714 }
715
716#ifdef CONFIG_FEATURE_IPV6
717 if (opt & ROUTE_OPT_INET6)
718 INET6_setroute(what, argv);
719 else
720#endif
721 INET_setroute(what, argv);
722
723 return EXIT_SUCCESS;
724}
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