source: MondoRescue/branches/3.3/mindi-busybox/networking/route.c@ 3790

Last change on this file since 3790 was 3621, checked in by Bruno Cornec, 9 years ago

New 3?3 banch for incorporation of latest busybox 1.25. Changing minor version to handle potential incompatibilities.
File size: 17.9 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#define RTF_NONEXTHOP 0x00200000 /* route with no nexthop */
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[] ALIGN1 =
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[] ALIGN1 =
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 uint16_t 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 NOINLINE void INET_setroute(int action, char **args)
164{
165 /* char buffer instead of bona-fide struct avoids aliasing warning */
166 char rt_buf[sizeof(struct rtentry)];
167 struct rtentry *const rt = (void *)rt_buf;
168
169 const char *netmask = NULL;
170 int skfd, isnet, xflag;
171
172 /* Grab the -net or -host options. Remember they were transformed. */
173 xflag = kw_lookup(tbl_hash_net_host, &args);
174
175 /* If we did grab -net or -host, make sure we still have an arg left. */
176 if (*args == NULL) {
177 bb_show_usage();
178 }
179
180 /* Clean out the RTREQ structure. */
181 memset(rt, 0, sizeof(*rt));
182
183 {
184 const char *target = *args++;
185 char *prefix;
186
187 /* recognize x.x.x.x/mask format. */
188 prefix = strchr(target, '/');
189 if (prefix) {
190 int prefix_len;
191
192 prefix_len = xatoul_range(prefix+1, 0, 32);
193 mask_in_addr(*rt) = htonl( ~(0xffffffffUL >> prefix_len));
194 *prefix = '\0';
195#if HAVE_NEW_ADDRT
196 rt->rt_genmask.sa_family = AF_INET;
197#endif
198 } else {
199 /* Default netmask. */
200 netmask = "default";
201 }
202 /* Prefer hostname lookup is -host flag (xflag==1) was given. */
203 isnet = INET_resolve(target, (struct sockaddr_in *) &rt->rt_dst,
204 (xflag & HOST_FLAG));
205 if (isnet < 0) {
206 bb_error_msg_and_die("resolving %s", target);
207 }
208 if (prefix) {
209 /* do not destroy prefix for process args */
210 *prefix = '/';
211 }
212 }
213
214 if (xflag) { /* Reinit isnet if -net or -host was specified. */
215 isnet = (xflag & NET_FLAG);
216 }
217
218 /* Fill in the other fields. */
219 rt->rt_flags = ((isnet) ? RTF_UP : (RTF_UP | RTF_HOST));
220
221 while (*args) {
222 int k = kw_lookup(tbl_ipvx, &args);
223 const char *args_m1 = args[-1];
224
225 if (k & KW_IPVx_FLAG_ONLY) {
226 rt->rt_flags |= flags_ipvx[k & 3];
227 continue;
228 }
229
230#if HAVE_NEW_ADDRT
231 if (k == KW_IPVx_METRIC) {
232 rt->rt_metric = xatoul(args_m1) + 1;
233 continue;
234 }
235#endif
236
237 if (k == KW_IPVx_NETMASK) {
238 struct sockaddr mask;
239
240 if (mask_in_addr(*rt)) {
241 bb_show_usage();
242 }
243
244 netmask = args_m1;
245 isnet = INET_resolve(netmask, (struct sockaddr_in *) &mask, 0);
246 if (isnet < 0) {
247 bb_error_msg_and_die("resolving %s", netmask);
248 }
249 rt->rt_genmask = full_mask(mask);
250 continue;
251 }
252
253 if (k == KW_IPVx_GATEWAY) {
254 if (rt->rt_flags & RTF_GATEWAY) {
255 bb_show_usage();
256 }
257
258 isnet = INET_resolve(args_m1,
259 (struct sockaddr_in *) &rt->rt_gateway, 1);
260 rt->rt_flags |= RTF_GATEWAY;
261
262 if (isnet) {
263 if (isnet < 0) {
264 bb_error_msg_and_die("resolving %s", args_m1);
265 }
266 bb_error_msg_and_die("gateway %s is a NETWORK", args_m1);
267 }
268 continue;
269 }
270
271 if (k == KW_IPVx_MSS) { /* Check valid MSS bounds. */
272 rt->rt_flags |= RTF_MSS;
273 rt->rt_mss = xatoul_range(args_m1, 64, 32768);
274 continue;
275 }
276
277 if (k == KW_IPVx_WINDOW) { /* Check valid window bounds. */
278 rt->rt_flags |= RTF_WINDOW;
279 rt->rt_window = xatoul_range(args_m1, 128, INT_MAX);
280 continue;
281 }
282
283#ifdef RTF_IRTT
284 if (k == KW_IPVx_IRTT) {
285 rt->rt_flags |= RTF_IRTT;
286 rt->rt_irtt = xatoul(args_m1);
287 rt->rt_irtt *= (bb_clk_tck() / 100); /* FIXME */
288#if 0 /* FIXME: do we need to check anything of this? */
289 if (rt->rt_irtt < 1 || rt->rt_irtt > (120 * HZ)) {
290 bb_error_msg_and_die("bad irtt");
291 }
292#endif
293 continue;
294 }
295#endif
296
297 /* Device is special in that it can be the last arg specified
298 * and doesn't requre the dev/device keyword in that case. */
299 if (!rt->rt_dev && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) {
300 /* Don't use args_m1 here since args may have changed! */
301 rt->rt_dev = args[-1];
302 continue;
303 }
304
305 /* Nothing matched. */
306 bb_show_usage();
307 }
308
309#ifdef RTF_REJECT
310 if ((rt->rt_flags & RTF_REJECT) && !rt->rt_dev) {
311 rt->rt_dev = (char*)"lo";
312 }
313#endif
314
315 /* sanity checks.. */
316 if (mask_in_addr(*rt)) {
317 uint32_t mask = mask_in_addr(*rt);
318
319 mask = ~ntohl(mask);
320 if ((rt->rt_flags & RTF_HOST) && mask != 0xffffffff) {
321 bb_error_msg_and_die("netmask %.8x and host route conflict",
322 (unsigned int) mask);
323 }
324 if (mask & (mask + 1)) {
325 bb_error_msg_and_die("bogus netmask %s", netmask);
326 }
327 mask = ((struct sockaddr_in *) &rt->rt_dst)->sin_addr.s_addr;
328 if (mask & ~(uint32_t)mask_in_addr(*rt)) {
329 bb_error_msg_and_die("netmask and route address conflict");
330 }
331 }
332
333 /* Fill out netmask if still unset */
334 if ((action == RTACTION_ADD) && (rt->rt_flags & RTF_HOST)) {
335 mask_in_addr(*rt) = 0xffffffff;
336 }
337
338 /* Create a socket to the INET kernel. */
339 skfd = xsocket(AF_INET, SOCK_DGRAM, 0);
340
341 if (action == RTACTION_ADD)
342 xioctl(skfd, SIOCADDRT, rt);
343 else
344 xioctl(skfd, SIOCDELRT, rt);
345
346 if (ENABLE_FEATURE_CLEAN_UP) close(skfd);
347}
348
349#if ENABLE_FEATURE_IPV6
350
351static NOINLINE void INET6_setroute(int action, char **args)
352{
353 struct sockaddr_in6 sa6;
354 struct in6_rtmsg rt;
355 int prefix_len, skfd;
356 const char *devname;
357
358 /* We know args isn't NULL from the check in route_main. */
359 const char *target = *args++;
360
361 if (strcmp(target, "default") == 0) {
362 prefix_len = 0;
363 memset(&sa6, 0, sizeof(sa6));
364 } else {
365 char *cp;
366 cp = strchr(target, '/'); /* Yes... const to non is ok. */
367 if (cp) {
368 *cp = '\0';
369 prefix_len = xatoul_range(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 /* Clean out the RTREQ structure. */
379 memset(&rt, 0, sizeof(rt));
380
381 memcpy(&rt.rtmsg_dst, sa6.sin6_addr.s6_addr, sizeof(struct in6_addr));
382
383 /* Fill in the other fields. */
384 rt.rtmsg_dst_len = prefix_len;
385 rt.rtmsg_flags = ((prefix_len == 128) ? (RTF_UP|RTF_HOST) : RTF_UP);
386 rt.rtmsg_metric = 1;
387
388 devname = NULL;
389
390 while (*args) {
391 int k = kw_lookup(tbl_ipvx, &args);
392 const char *args_m1 = args[-1];
393
394 if ((k == KW_IPVx_MOD) || (k == KW_IPVx_DYN)) {
395 rt.rtmsg_flags |= flags_ipvx[k & 3];
396 continue;
397 }
398
399 if (k == KW_IPVx_METRIC) {
400 rt.rtmsg_metric = xatoul(args_m1);
401 continue;
402 }
403
404 if (k == KW_IPVx_GATEWAY) {
405 if (rt.rtmsg_flags & RTF_GATEWAY) {
406 bb_show_usage();
407 }
408
409 if (INET6_resolve(args_m1, (struct sockaddr_in6 *) &sa6) < 0) {
410 bb_error_msg_and_die("resolving %s", args_m1);
411 }
412 memcpy(&rt.rtmsg_gateway, sa6.sin6_addr.s6_addr,
413 sizeof(struct in6_addr));
414 rt.rtmsg_flags |= RTF_GATEWAY;
415 continue;
416 }
417
418 /* Device is special in that it can be the last arg specified
419 * and doesn't requre the dev/device keyword in that case. */
420 if (!devname && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) {
421 /* Don't use args_m1 here since args may have changed! */
422 devname = args[-1];
423 continue;
424 }
425
426 /* Nothing matched. */
427 bb_show_usage();
428 }
429
430 /* Create a socket to the INET6 kernel. */
431 skfd = xsocket(AF_INET6, SOCK_DGRAM, 0);
432
433 rt.rtmsg_ifindex = 0;
434
435 if (devname) {
436 struct ifreq ifr;
437 memset(&ifr, 0, sizeof(ifr));
438 strncpy_IFNAMSIZ(ifr.ifr_name, devname);
439 xioctl(skfd, SIOCGIFINDEX, &ifr);
440 rt.rtmsg_ifindex = ifr.ifr_ifindex;
441 }
442
443 /* Tell the kernel to accept this route. */
444 if (action == RTACTION_ADD)
445 xioctl(skfd, SIOCADDRT, &rt);
446 else
447 xioctl(skfd, SIOCDELRT, &rt);
448
449 if (ENABLE_FEATURE_CLEAN_UP) close(skfd);
450}
451#endif
452
453static const
454IF_NOT_FEATURE_IPV6(uint16_t)
455IF_FEATURE_IPV6(unsigned)
456flagvals[] = { /* Must agree with flagchars[]. */
457 RTF_UP,
458 RTF_GATEWAY,
459 RTF_HOST,
460 RTF_REINSTATE,
461 RTF_DYNAMIC,
462 RTF_MODIFIED,
463#if ENABLE_FEATURE_IPV6
464 RTF_DEFAULT,
465 RTF_ADDRCONF,
466 RTF_CACHE,
467 RTF_REJECT,
468 RTF_NONEXTHOP, /* this one doesn't fit into 16 bits */
469#endif
470};
471/* Must agree with flagvals[]. */
472static const char flagchars[] ALIGN1 =
473 "UGHRDM"
474#if ENABLE_FEATURE_IPV6
475 "DAC!n"
476#endif
477;
478#define IPV4_MASK (RTF_UP|RTF_GATEWAY|RTF_HOST|RTF_REINSTATE|RTF_DYNAMIC|RTF_MODIFIED)
479#define IPV6_MASK (RTF_UP|RTF_GATEWAY|RTF_HOST|RTF_DEFAULT|RTF_ADDRCONF|RTF_CACHE|RTF_REJECT|RTF_NONEXTHOP)
480
481static void set_flags(char *flagstr, int flags)
482{
483 int i;
484
485 for (i = 0; (*flagstr = flagchars[i]) != 0; i++) {
486 if (flags & flagvals[i]) {
487 ++flagstr;
488 }
489 }
490}
491
492/* also used in netstat */
493void FAST_FUNC bb_displayroutes(int noresolve, int netstatfmt)
494{
495 char devname[64], flags[16], *sdest, *sgw;
496 unsigned long d, g, m;
497 int r;
498 int flgs, ref, use, metric, mtu, win, ir;
499 struct sockaddr_in s_addr;
500 struct in_addr mask;
501
502 FILE *fp = xfopen_for_read("/proc/net/route");
503
504 printf("Kernel IP routing table\n"
505 "Destination Gateway Genmask Flags %s Iface\n",
506 netstatfmt ? " MSS Window irtt" : "Metric Ref Use");
507
508 /* Skip the first line. */
509 r = fscanf(fp, "%*[^\n]\n");
510 if (r < 0) {
511 /* Empty line, read error, or EOF. Yes, if routing table
512 * is completely empty, /proc/net/route has no header.
513 */
514 goto ERROR;
515 }
516 while (1) {
517 r = fscanf(fp, "%63s%lx%lx%X%d%d%d%lx%d%d%d\n",
518 devname, &d, &g, &flgs, &ref, &use, &metric, &m,
519 &mtu, &win, &ir);
520 if (r != 11) {
521 ERROR:
522 if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */
523 break;
524 }
525 bb_perror_msg_and_die(bb_msg_read_error);
526 }
527
528 if (!(flgs & RTF_UP)) { /* Skip interfaces that are down. */
529 continue;
530 }
531
532 set_flags(flags, (flgs & IPV4_MASK));
533#ifdef RTF_REJECT
534 if (flgs & RTF_REJECT) {
535 flags[0] = '!';
536 }
537#endif
538
539 memset(&s_addr, 0, sizeof(struct sockaddr_in));
540 s_addr.sin_family = AF_INET;
541 s_addr.sin_addr.s_addr = d;
542 sdest = INET_rresolve(&s_addr, (noresolve | 0x8000), m); /* 'default' instead of '*' */
543 s_addr.sin_addr.s_addr = g;
544 sgw = INET_rresolve(&s_addr, (noresolve | 0x4000), m); /* Host instead of net */
545 mask.s_addr = m;
546 /* "%15.15s" truncates hostnames, do we really want that? */
547 printf("%-15.15s %-15.15s %-16s%-6s", sdest, sgw, inet_ntoa(mask), flags);
548 free(sdest);
549 free(sgw);
550 if (netstatfmt) {
551 printf("%5d %-5d %6d %s\n", mtu, win, ir, devname);
552 } else {
553 printf("%-6d %-2d %7d %s\n", metric, ref, use, devname);
554 }
555 }
556 fclose(fp);
557}
558
559#if ENABLE_FEATURE_IPV6
560
561static void INET6_displayroutes(void)
562{
563 char addr6[128], *naddr6;
564 /* In addr6x, we store both 40-byte ':'-delimited ipv6 addresses.
565 * We read the non-delimited strings into the tail of the buffer
566 * using fscanf and then modify the buffer by shifting forward
567 * while inserting ':'s and the nul terminator for the first string.
568 * Hence the strings are at addr6x and addr6x+40. This generates
569 * _much_ less code than the previous (upstream) approach. */
570 char addr6x[80];
571 char iface[16], flags[16];
572 int iflags, metric, refcnt, use, prefix_len, slen;
573 struct sockaddr_in6 snaddr6;
574
575 FILE *fp = xfopen_for_read("/proc/net/ipv6_route");
576
577 printf("Kernel IPv6 routing table\n%-44s%-40s"
578 "Flags Metric Ref Use Iface\n",
579 "Destination", "Next Hop");
580
581 while (1) {
582 int r;
583 r = fscanf(fp, "%32s%x%*s%x%32s%x%x%x%x%s\n",
584 addr6x+14, &prefix_len, &slen, addr6x+40+7,
585 &metric, &refcnt, &use, &iflags, iface);
586 if (r != 9) {
587 if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */
588 break;
589 }
590 ERROR:
591 bb_perror_msg_and_die(bb_msg_read_error);
592 }
593
594 /* Do the addr6x shift-and-insert changes to ':'-delimit addresses.
595 * For now, always do this to validate the proc route format, even
596 * if the interface is down. */
597 {
598 int i = 0;
599 char *p = addr6x+14;
600
601 do {
602 if (!*p) {
603 if (i == 40) { /* nul terminator for 1st address? */
604 addr6x[39] = 0; /* Fixup... need 0 instead of ':'. */
605 ++p; /* Skip and continue. */
606 continue;
607 }
608 goto ERROR;
609 }
610 addr6x[i++] = *p++;
611 if (!((i+1) % 5)) {
612 addr6x[i++] = ':';
613 }
614 } while (i < 40+28+7);
615 }
616
617 set_flags(flags, (iflags & IPV6_MASK));
618
619 r = 0;
620 while (1) {
621 inet_pton(AF_INET6, addr6x + r,
622 (struct sockaddr *) &snaddr6.sin6_addr);
623 snaddr6.sin6_family = AF_INET6;
624 naddr6 = INET6_rresolve((struct sockaddr_in6 *) &snaddr6,
625 0x0fff /* Apparently, upstream never resolves. */
626 );
627
628 if (!r) { /* 1st pass */
629 snprintf(addr6, sizeof(addr6), "%s/%d", naddr6, prefix_len);
630 r += 40;
631 free(naddr6);
632 } else { /* 2nd pass */
633 /* Print the info. */
634 printf("%-43s %-39s %-5s %-6d %-2d %7d %-8s\n",
635 addr6, naddr6, flags, metric, refcnt, use, iface);
636 free(naddr6);
637 break;
638 }
639 }
640 }
641 fclose(fp);
642}
643
644#endif
645
646#define ROUTE_OPT_A 0x01
647#define ROUTE_OPT_n 0x02
648#define ROUTE_OPT_e 0x04
649#define ROUTE_OPT_INET6 0x08 /* Not an actual option. See below. */
650
651/* 1st byte is offset to next entry offset. 2nd byte is return value. */
652/* 2nd byte matches RTACTION_* code */
653static const char tbl_verb[] ALIGN1 =
654 "\006\001add\0"
655 "\006\002del\0"
656/* "\011\002delete\0" */
657 "\010\002delete" /* Since it's last, we can save a byte. */
658;
659
660int route_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
661int route_main(int argc UNUSED_PARAM, char **argv)
662{
663 unsigned opt;
664 int what;
665 char *family;
666 char **p;
667
668 /* First, remap '-net' and '-host' to avoid getopt problems. */
669 p = argv;
670 while (*++p) {
671 if (strcmp(*p, "-net") == 0 || strcmp(*p, "-host") == 0) {
672 p[0][0] = '#';
673 }
674 }
675
676 opt = getopt32(argv, "A:ne", &family);
677
678 if ((opt & ROUTE_OPT_A) && strcmp(family, "inet") != 0) {
679#if ENABLE_FEATURE_IPV6
680 if (strcmp(family, "inet6") == 0) {
681 opt |= ROUTE_OPT_INET6; /* Set flag for ipv6. */
682 } else
683#endif
684 bb_show_usage();
685 }
686
687 argv += optind;
688
689 /* No more args means display the routing table. */
690 if (!*argv) {
691 int noresolve = (opt & ROUTE_OPT_n) ? 0x0fff : 0;
692#if ENABLE_FEATURE_IPV6
693 if (opt & ROUTE_OPT_INET6)
694 INET6_displayroutes();
695 else
696#endif
697 bb_displayroutes(noresolve, opt & ROUTE_OPT_e);
698
699 fflush_stdout_and_exit(EXIT_SUCCESS);
700 }
701
702 /* Check verb. At the moment, must be add, del, or delete. */
703 what = kw_lookup(tbl_verb, &argv);
704 if (!what || !*argv) { /* Unknown verb or no more args. */
705 bb_show_usage();
706 }
707
708#if ENABLE_FEATURE_IPV6
709 if (opt & ROUTE_OPT_INET6)
710 INET6_setroute(what, argv);
711 else
712#endif
713 INET_setroute(what, argv);
714
715 return EXIT_SUCCESS;
716}
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