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path: root/networking/route.c (plain)
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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 <sys/socket.h>
37#include <net/route.h>
38#include <net/if.h>
39
40#include "libbb.h"
41#include "inet_common.h"
42
43#if ENABLE_FEATURE_IPV6
44#include <linux/ipv6_route.h>
45#endif
46
47#ifndef RTF_UP
48/* Keep this in sync with /usr/src/linux/include/linux/route.h */
49#define RTF_UP 0x0001 /* route usable */
50#define RTF_GATEWAY 0x0002 /* destination is a gateway */
51#define RTF_HOST 0x0004 /* host entry (net otherwise) */
52#define RTF_REINSTATE 0x0008 /* reinstate route after tmout */
53#define RTF_DYNAMIC 0x0010 /* created dyn. (by redirect) */
54#define RTF_MODIFIED 0x0020 /* modified dyn. (by redirect) */
55#define RTF_MTU 0x0040 /* specific MTU for this route */
56#ifndef RTF_MSS
57#define RTF_MSS RTF_MTU /* Compatibility :-( */
58#endif
59#define RTF_WINDOW 0x0080 /* per route window clamping */
60#define RTF_IRTT 0x0100 /* Initial round trip time */
61#define RTF_REJECT 0x0200 /* Reject route */
62#endif
63
64#ifndef RTF_CACHE
65#define RTF_DEFAULT 0x00010000 /* default - learned via ND */
66#define RTF_ADDRCONF 0x00040000 /* addrconf route - RA */
67#define RTF_CACHE 0x01000000 /* cache entry */
68#endif
69
70#if defined(SIOCADDRTOLD) || defined(RTF_IRTT) /* route */
71#define HAVE_NEW_ADDRT 1
72#endif
73
74#if HAVE_NEW_ADDRT
75#define mask_in_addr(x) (((struct sockaddr_in *)&((x).rt_genmask))->sin_addr.s_addr)
76#define full_mask(x) (x)
77#else
78#define mask_in_addr(x) ((x).rt_genmask)
79#define full_mask(x) (((struct sockaddr_in *)&(x))->sin_addr.s_addr)
80#endif
81
82/* The RTACTION entries must agree with tbl_verb[] below! */
83#define RTACTION_ADD 1
84#define RTACTION_DEL 2
85
86/* For the various tbl_*[] arrays, the 1st byte is the offset to
87 * the next entry and the 2nd byte is return value. */
88
89#define NET_FLAG 1
90#define HOST_FLAG 2
91
92/* We remap '-' to '#' to avoid problems with getopt. */
93static const char tbl_hash_net_host[] ALIGN1 =
94 "\007\001#net\0"
95/* "\010\002#host\0" */
96 "\007\002#host" /* Since last, we can save a byte. */
97;
98
99#define KW_TAKES_ARG 020
100#define KW_SETS_FLAG 040
101
102#define KW_IPVx_METRIC 020
103#define KW_IPVx_NETMASK 021
104#define KW_IPVx_GATEWAY 022
105#define KW_IPVx_MSS 023
106#define KW_IPVx_WINDOW 024
107#define KW_IPVx_IRTT 025
108#define KW_IPVx_DEVICE 026
109
110#define KW_IPVx_FLAG_ONLY 040
111#define KW_IPVx_REJECT 040
112#define KW_IPVx_MOD 041
113#define KW_IPVx_DYN 042
114#define KW_IPVx_REINSTATE 043
115
116static const char tbl_ipvx[] ALIGN1 =
117 /* 020 is the "takes an arg" bit */
118#if HAVE_NEW_ADDRT
119 "\011\020metric\0"
120#endif
121 "\012\021netmask\0"
122 "\005\022gw\0"
123 "\012\022gateway\0"
124 "\006\023mss\0"
125 "\011\024window\0"
126#ifdef RTF_IRTT
127 "\007\025irtt\0"
128#endif
129 "\006\026dev\0"
130 "\011\026device\0"
131 /* 040 is the "sets a flag" bit - MUST match flags_ipvx[] values below. */
132#ifdef RTF_REJECT
133 "\011\040reject\0"
134#endif
135 "\006\041mod\0"
136 "\006\042dyn\0"
137/* "\014\043reinstate\0" */
138 "\013\043reinstate" /* Since last, we can save a byte. */
139;
140
141static const int flags_ipvx[] = { /* MUST match tbl_ipvx[] values above. */
142#ifdef RTF_REJECT
143 RTF_REJECT,
144#endif
145 RTF_MODIFIED,
146 RTF_DYNAMIC,
147 RTF_REINSTATE
148};
149
150static int kw_lookup(const char *kwtbl, char ***pargs)
151{
152 if (**pargs) {
153 do {
154 if (strcmp(kwtbl+2, **pargs) == 0) { /* Found a match. */
155 *pargs += 1;
156 if (kwtbl[1] & KW_TAKES_ARG) {
157 if (!**pargs) { /* No more args! */
158 bb_show_usage();
159 }
160 *pargs += 1; /* Calling routine will use args[-1]. */
161 }
162 return kwtbl[1];
163 }
164 kwtbl += *kwtbl;
165 } while (*kwtbl);
166 }
167 return 0;
168}
169
170/* Add or delete a route, depending on action. */
171
172static NOINLINE void INET_setroute(int action, char **args)
173{
174 /* char buffer instead of bona-fide struct avoids aliasing warning */
175 char rt_buf[sizeof(struct rtentry)];
176 struct rtentry *const rt = (void *)rt_buf;
177
178 const char *netmask = NULL;
179 int skfd, isnet, xflag;
180
181 /* Grab the -net or -host options. Remember they were transformed. */
182 xflag = kw_lookup(tbl_hash_net_host, &args);
183
184 /* If we did grab -net or -host, make sure we still have an arg left. */
185 if (*args == NULL) {
186 bb_show_usage();
187 }
188
189 /* Clean out the RTREQ structure. */
190 memset(rt, 0, sizeof(*rt));
191
192 {
193 const char *target = *args++;
194 char *prefix;
195
196 /* recognize x.x.x.x/mask format. */
197 prefix = strchr(target, '/');
198 if (prefix) {
199 int prefix_len;
200
201 prefix_len = xatoul_range(prefix+1, 0, 32);
202 mask_in_addr(*rt) = htonl( ~(0xffffffffUL >> prefix_len));
203 *prefix = '\0';
204#if HAVE_NEW_ADDRT
205 rt->rt_genmask.sa_family = AF_INET;
206#endif
207 } else {
208 /* Default netmask. */
209 netmask = "default";
210 }
211 /* Prefer hostname lookup is -host flag (xflag==1) was given. */
212 isnet = INET_resolve(target, (struct sockaddr_in *) &rt->rt_dst,
213 (xflag & HOST_FLAG));
214 if (isnet < 0) {
215 bb_error_msg_and_die("resolving %s", target);
216 }
217 if (prefix) {
218 /* do not destroy prefix for process args */
219 *prefix = '/';
220 }
221 }
222
223 if (xflag) { /* Reinit isnet if -net or -host was specified. */
224 isnet = (xflag & NET_FLAG);
225 }
226
227 /* Fill in the other fields. */
228 rt->rt_flags = ((isnet) ? RTF_UP : (RTF_UP | RTF_HOST));
229
230 while (*args) {
231 int k = kw_lookup(tbl_ipvx, &args);
232 const char *args_m1 = args[-1];
233
234 if (k & KW_IPVx_FLAG_ONLY) {
235 rt->rt_flags |= flags_ipvx[k & 3];
236 continue;
237 }
238
239#if HAVE_NEW_ADDRT
240 if (k == KW_IPVx_METRIC) {
241 rt->rt_metric = xatoul(args_m1) + 1;
242 continue;
243 }
244#endif
245
246 if (k == KW_IPVx_NETMASK) {
247 struct sockaddr mask;
248
249 if (mask_in_addr(*rt)) {
250 bb_show_usage();
251 }
252
253 netmask = args_m1;
254 isnet = INET_resolve(netmask, (struct sockaddr_in *) &mask, 0);
255 if (isnet < 0) {
256 bb_error_msg_and_die("resolving %s", netmask);
257 }
258 rt->rt_genmask = full_mask(mask);
259 continue;
260 }
261
262 if (k == KW_IPVx_GATEWAY) {
263 if (rt->rt_flags & RTF_GATEWAY) {
264 bb_show_usage();
265 }
266
267 isnet = INET_resolve(args_m1,
268 (struct sockaddr_in *) &rt->rt_gateway, 1);
269 rt->rt_flags |= RTF_GATEWAY;
270
271 if (isnet) {
272 if (isnet < 0) {
273 bb_error_msg_and_die("resolving %s", args_m1);
274 }
275 bb_error_msg_and_die("gateway %s is a NETWORK", args_m1);
276 }
277 continue;
278 }
279
280 if (k == KW_IPVx_MSS) { /* Check valid MSS bounds. */
281 rt->rt_flags |= RTF_MSS;
282 rt->rt_mss = xatoul_range(args_m1, 64, 32768);
283 continue;
284 }
285
286 if (k == KW_IPVx_WINDOW) { /* Check valid window bounds. */
287 rt->rt_flags |= RTF_WINDOW;
288 rt->rt_window = xatoul_range(args_m1, 128, INT_MAX);
289 continue;
290 }
291
292#ifdef RTF_IRTT
293 if (k == KW_IPVx_IRTT) {
294 rt->rt_flags |= RTF_IRTT;
295 rt->rt_irtt = xatoul(args_m1);
296 rt->rt_irtt *= (sysconf(_SC_CLK_TCK) / 100); /* FIXME */
297#if 0 /* FIXME: do we need to check anything of this? */
298 if (rt->rt_irtt < 1 || rt->rt_irtt > (120 * HZ)) {
299 bb_error_msg_and_die("bad irtt");
300 }
301#endif
302 continue;
303 }
304#endif
305
306 /* Device is special in that it can be the last arg specified
307 * and doesn't requre the dev/device keyword in that case. */
308 if (!rt->rt_dev && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) {
309 /* Don't use args_m1 here since args may have changed! */
310 rt->rt_dev = args[-1];
311 continue;
312 }
313
314 /* Nothing matched. */
315 bb_show_usage();
316 }
317
318#ifdef RTF_REJECT
319 if ((rt->rt_flags & RTF_REJECT) && !rt->rt_dev) {
320 rt->rt_dev = (char*)"lo";
321 }
322#endif
323
324 /* sanity checks.. */
325 if (mask_in_addr(*rt)) {
326 uint32_t mask = mask_in_addr(*rt);
327
328 mask = ~ntohl(mask);
329 if ((rt->rt_flags & RTF_HOST) && mask != 0xffffffff) {
330 bb_error_msg_and_die("netmask %.8x and host route conflict",
331 (unsigned int) mask);
332 }
333 if (mask & (mask + 1)) {
334 bb_error_msg_and_die("bogus netmask %s", netmask);
335 }
336 mask = ((struct sockaddr_in *) &rt->rt_dst)->sin_addr.s_addr;
337 if (mask & ~(uint32_t)mask_in_addr(*rt)) {
338 bb_error_msg_and_die("netmask and route address conflict");
339 }
340 }
341
342 /* Fill out netmask if still unset */
343 if ((action == RTACTION_ADD) && (rt->rt_flags & RTF_HOST)) {
344 mask_in_addr(*rt) = 0xffffffff;
345 }
346
347 /* Create a socket to the INET kernel. */
348 skfd = xsocket(AF_INET, SOCK_DGRAM, 0);
349
350 if (action == RTACTION_ADD)
351 xioctl(skfd, SIOCADDRT, rt);
352 else
353 xioctl(skfd, SIOCDELRT, rt);
354
355 if (ENABLE_FEATURE_CLEAN_UP) close(skfd);
356}
357
358#if ENABLE_FEATURE_IPV6
359
360static NOINLINE void INET6_setroute(int action, char **args)
361{
362 struct sockaddr_in6 sa6;
363 struct in6_rtmsg rt;
364 int prefix_len, skfd;
365 const char *devname;
366
367 /* We know args isn't NULL from the check in route_main. */
368 const char *target = *args++;
369
370 if (strcmp(target, "default") == 0) {
371 prefix_len = 0;
372 memset(&sa6, 0, sizeof(sa6));
373 } else {
374 char *cp;
375 cp = strchr(target, '/'); /* Yes... const to non is ok. */
376 if (cp) {
377 *cp = '\0';
378 prefix_len = xatoul_range(cp + 1, 0, 128);
379 } else {
380 prefix_len = 128;
381 }
382 if (INET6_resolve(target, (struct sockaddr_in6 *) &sa6) < 0) {
383 bb_error_msg_and_die("resolving %s", target);
384 }
385 }
386
387 /* Clean out the RTREQ structure. */
388 memset(&rt, 0, sizeof(rt));
389
390 memcpy(&rt.rtmsg_dst, sa6.sin6_addr.s6_addr, sizeof(struct in6_addr));
391
392 /* Fill in the other fields. */
393 rt.rtmsg_dst_len = prefix_len;
394 rt.rtmsg_flags = ((prefix_len == 128) ? (RTF_UP|RTF_HOST) : RTF_UP);
395 rt.rtmsg_metric = 1;
396
397 devname = NULL;
398
399 while (*args) {
400 int k = kw_lookup(tbl_ipvx, &args);
401 const char *args_m1 = args[-1];
402
403 if ((k == KW_IPVx_MOD) || (k == KW_IPVx_DYN)) {
404 rt.rtmsg_flags |= flags_ipvx[k & 3];
405 continue;
406 }
407
408 if (k == KW_IPVx_METRIC) {
409 rt.rtmsg_metric = xatoul(args_m1);
410 continue;
411 }
412
413 if (k == KW_IPVx_GATEWAY) {
414 if (rt.rtmsg_flags & RTF_GATEWAY) {
415 bb_show_usage();
416 }
417
418 if (INET6_resolve(args_m1, (struct sockaddr_in6 *) &sa6) < 0) {
419 bb_error_msg_and_die("resolving %s", args_m1);
420 }
421 memcpy(&rt.rtmsg_gateway, sa6.sin6_addr.s6_addr,
422 sizeof(struct in6_addr));
423 rt.rtmsg_flags |= RTF_GATEWAY;
424 continue;
425 }
426
427 /* Device is special in that it can be the last arg specified
428 * and doesn't requre the dev/device keyword in that case. */
429 if (!devname && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) {
430 /* Don't use args_m1 here since args may have changed! */
431 devname = args[-1];
432 continue;
433 }
434
435 /* Nothing matched. */
436 bb_show_usage();
437 }
438
439 /* Create a socket to the INET6 kernel. */
440 skfd = xsocket(AF_INET6, SOCK_DGRAM, 0);
441
442 rt.rtmsg_ifindex = 0;
443
444 if (devname) {
445 struct ifreq ifr;
446 memset(&ifr, 0, sizeof(ifr));
447 strncpy_IFNAMSIZ(ifr.ifr_name, devname);
448 xioctl(skfd, SIOCGIFINDEX, &ifr);
449 rt.rtmsg_ifindex = ifr.ifr_ifindex;
450 }
451
452 /* Tell the kernel to accept this route. */
453 if (action == RTACTION_ADD)
454 xioctl(skfd, SIOCADDRT, &rt);
455 else
456 xioctl(skfd, SIOCDELRT, &rt);
457
458 if (ENABLE_FEATURE_CLEAN_UP) close(skfd);
459}
460#endif
461
462static const unsigned flagvals[] = { /* Must agree with flagchars[]. */
463 RTF_GATEWAY,
464 RTF_HOST,
465 RTF_REINSTATE,
466 RTF_DYNAMIC,
467 RTF_MODIFIED,
468#if ENABLE_FEATURE_IPV6
469 RTF_DEFAULT,
470 RTF_ADDRCONF,
471 RTF_CACHE
472#endif
473};
474
475#define IPV4_MASK (RTF_GATEWAY|RTF_HOST|RTF_REINSTATE|RTF_DYNAMIC|RTF_MODIFIED)
476#define IPV6_MASK (RTF_GATEWAY|RTF_HOST|RTF_DEFAULT|RTF_ADDRCONF|RTF_CACHE)
477
478/* Must agree with flagvals[]. */
479static const char flagchars[] ALIGN1 =
480 "GHRDM"
481#if ENABLE_FEATURE_IPV6
482 "DAC"
483#endif
484;
485
486static void set_flags(char *flagstr, int flags)
487{
488 int i;
489
490 *flagstr++ = 'U';
491
492 for (i = 0; (*flagstr = flagchars[i]) != 0; i++) {
493 if (flags & flagvals[i]) {
494 ++flagstr;
495 }
496 }
497}
498
499/* also used in netstat */
500void FAST_FUNC bb_displayroutes(int noresolve, int netstatfmt)
501{
502 char devname[64], flags[16], *sdest, *sgw;
503 unsigned long d, g, m;
504 int flgs, ref, use, metric, mtu, win, ir;
505 struct sockaddr_in s_addr;
506 struct in_addr mask;
507
508 FILE *fp = xfopen_for_read("/proc/net/route");
509
510 printf("Kernel IP routing table\n"
511 "Destination Gateway Genmask Flags %s Iface\n",
512 netstatfmt ? " MSS Window irtt" : "Metric Ref Use");
513
514 if (fscanf(fp, "%*[^\n]\n") < 0) { /* Skip the first line. */
515 goto ERROR; /* Empty or missing line, or read error. */
516 }
517 while (1) {
518 int r;
519 r = fscanf(fp, "%63s%lx%lx%X%d%d%d%lx%d%d%d\n",
520 devname, &d, &g, &flgs, &ref, &use, &metric, &m,
521 &mtu, &win, &ir);
522 if (r != 11) {
523 if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */
524 break;
525 }
526 ERROR:
527 bb_error_msg_and_die("fscanf");
528 }
529
530 if (!(flgs & RTF_UP)) { /* Skip interfaces that are down. */
531 continue;
532 }
533
534 set_flags(flags, (flgs & IPV4_MASK));
535#ifdef RTF_REJECT
536 if (flgs & RTF_REJECT) {
537 flags[0] = '!';
538 }
539#endif
540
541 memset(&s_addr, 0, sizeof(struct sockaddr_in));
542 s_addr.sin_family = AF_INET;
543 s_addr.sin_addr.s_addr = d;
544 sdest = INET_rresolve(&s_addr, (noresolve | 0x8000), m); /* 'default' instead of '*' */
545 s_addr.sin_addr.s_addr = g;
546 sgw = INET_rresolve(&s_addr, (noresolve | 0x4000), m); /* Host instead of net */
547 mask.s_addr = m;
548 /* "%15.15s" truncates hostnames, do we really want that? */
549 printf("%-15.15s %-15.15s %-16s%-6s", sdest, sgw, inet_ntoa(mask), flags);
550 free(sdest);
551 free(sgw);
552 if (netstatfmt) {
553 printf("%5d %-5d %6d %s\n", mtu, win, ir, devname);
554 } else {
555 printf("%-6d %-2d %7d %s\n", metric, ref, use, devname);
556 }
557 }
558 fclose(fp);
559}
560
561#if ENABLE_FEATURE_IPV6
562
563static void INET6_displayroutes(void)
564{
565 char addr6[128], *naddr6;
566 /* In addr6x, we store both 40-byte ':'-delimited ipv6 addresses.
567 * We read the non-delimited strings into the tail of the buffer
568 * using fscanf and then modify the buffer by shifting forward
569 * while inserting ':'s and the nul terminator for the first string.
570 * Hence the strings are at addr6x and addr6x+40. This generates
571 * _much_ less code than the previous (upstream) approach. */
572 char addr6x[80];
573 char iface[16], flags[16];
574 int iflags, metric, refcnt, use, prefix_len, slen;
575 struct sockaddr_in6 snaddr6;
576
577 FILE *fp = xfopen_for_read("/proc/net/ipv6_route");
578
579 printf("Kernel IPv6 routing table\n%-44s%-40s"
580 "Flags Metric Ref Use Iface\n",
581 "Destination", "Next Hop");
582
583 while (1) {
584 int r;
585 r = fscanf(fp, "%32s%x%*s%x%32s%x%x%x%x%s\n",
586 addr6x+14, &prefix_len, &slen, addr6x+40+7,
587 &metric, &use, &refcnt, &iflags, iface);
588 if (r != 9) {
589 if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */
590 break;
591 }
592 ERROR:
593 bb_error_msg_and_die("fscanf");
594 }
595
596 /* Do the addr6x shift-and-insert changes to ':'-delimit addresses.
597 * For now, always do this to validate the proc route format, even
598 * if the interface is down. */
599 {
600 int i = 0;
601 char *p = addr6x+14;
602
603 do {
604 if (!*p) {
605 if (i == 40) { /* nul terminator for 1st address? */
606 addr6x[39] = 0; /* Fixup... need 0 instead of ':'. */
607 ++p; /* Skip and continue. */
608 continue;
609 }
610 goto ERROR;
611 }
612 addr6x[i++] = *p++;
613 if (!((i+1) % 5)) {
614 addr6x[i++] = ':';
615 }
616 } while (i < 40+28+7);
617 }
618
619 if (!(iflags & RTF_UP)) { /* Skip interfaces that are down. */
620 continue;
621 }
622
623 set_flags(flags, (iflags & IPV6_MASK));
624
625 r = 0;
626 while (1) {
627 inet_pton(AF_INET6, addr6x + r,
628 (struct sockaddr *) &snaddr6.sin6_addr);
629 snaddr6.sin6_family = AF_INET6;
630 naddr6 = INET6_rresolve((struct sockaddr_in6 *) &snaddr6,
631 0x0fff /* Apparently, upstream never resolves. */
632 );
633
634 if (!r) { /* 1st pass */
635 snprintf(addr6, sizeof(addr6), "%s/%d", naddr6, prefix_len);
636 r += 40;
637 free(naddr6);
638 } else { /* 2nd pass */
639 /* Print the info. */
640 printf("%-43s %-39s %-5s %-6d %-2d %7d %-8s\n",
641 addr6, naddr6, flags, metric, refcnt, use, iface);
642 free(naddr6);
643 break;
644 }
645 }
646 }
647 fclose(fp);
648}
649
650#endif
651
652#define ROUTE_OPT_A 0x01
653#define ROUTE_OPT_n 0x02
654#define ROUTE_OPT_e 0x04
655#define ROUTE_OPT_INET6 0x08 /* Not an actual option. See below. */
656
657/* 1st byte is offset to next entry offset. 2nd byte is return value. */
658/* 2nd byte matches RTACTION_* code */
659static const char tbl_verb[] ALIGN1 =
660 "\006\001add\0"
661 "\006\002del\0"
662/* "\011\002delete\0" */
663 "\010\002delete" /* Since it's last, we can save a byte. */
664;
665
666int route_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
667int route_main(int argc UNUSED_PARAM, char **argv)
668{
669 unsigned opt;
670 int what;
671 char *family;
672 char **p;
673
674 /* First, remap '-net' and '-host' to avoid getopt problems. */
675 p = argv;
676 while (*++p) {
677 if (strcmp(*p, "-net") == 0 || strcmp(*p, "-host") == 0) {
678 p[0][0] = '#';
679 }
680 }
681
682 opt = getopt32(argv, "A:ne", &family);
683
684 if ((opt & ROUTE_OPT_A) && strcmp(family, "inet") != 0) {
685#if ENABLE_FEATURE_IPV6
686 if (strcmp(family, "inet6") == 0) {
687 opt |= ROUTE_OPT_INET6; /* Set flag for ipv6. */
688 } else
689#endif
690 bb_show_usage();
691 }
692
693 argv += optind;
694
695 /* No more args means display the routing table. */
696 if (!*argv) {
697 int noresolve = (opt & ROUTE_OPT_n) ? 0x0fff : 0;
698#if ENABLE_FEATURE_IPV6
699 if (opt & ROUTE_OPT_INET6)
700 INET6_displayroutes();
701 else
702#endif
703 bb_displayroutes(noresolve, opt & ROUTE_OPT_e);
704
705 fflush_stdout_and_exit(EXIT_SUCCESS);
706 }
707
708 /* Check verb. At the moment, must be add, del, or delete. */
709 what = kw_lookup(tbl_verb, &argv);
710 if (!what || !*argv) { /* Unknown verb or no more args. */
711 bb_show_usage();
712 }
713
714#if ENABLE_FEATURE_IPV6
715 if (opt & ROUTE_OPT_INET6)
716 INET6_setroute(what, argv);
717 else
718#endif
719 INET_setroute(what, argv);
720
721 return EXIT_SUCCESS;
722}
723
generated by cgit at 2024-05-15 13:09:41 (GMT)