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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//config:config ROUTE
28//config: bool "route"
29//config: default y
30//config: select PLATFORM_LINUX
31//config: help
32//config: Route displays or manipulates the kernel's IP routing tables.
33
34//applet:IF_ROUTE(APPLET(route, BB_DIR_SBIN, BB_SUID_DROP))
35
36//kbuild:lib-$(CONFIG_ROUTE) += route.o
37
38//usage:#define route_trivial_usage
39//usage: "[{add|del|delete}]"
40//usage:#define route_full_usage "\n\n"
41//usage: "Edit kernel routing tables\n"
42//usage: "\n -n Don't resolve names"
43//usage: "\n -e Display other/more information"
44//usage: "\n -A inet" IF_FEATURE_IPV6("{6}") " Select address family"
45
46#include <sys/socket.h>
47#include <net/route.h>
48#include <net/if.h>
49
50#include "libbb.h"
51#include "inet_common.h"
52
53#if ENABLE_FEATURE_IPV6
54#include <linux/ipv6_route.h>
55#endif
56
57#ifndef RTF_UP
58/* Keep this in sync with /usr/src/linux/include/linux/route.h */
59#define RTF_UP 0x0001 /* route usable */
60#define RTF_GATEWAY 0x0002 /* destination is a gateway */
61#define RTF_HOST 0x0004 /* host entry (net otherwise) */
62#define RTF_REINSTATE 0x0008 /* reinstate route after tmout */
63#define RTF_DYNAMIC 0x0010 /* created dyn. (by redirect) */
64#define RTF_MODIFIED 0x0020 /* modified dyn. (by redirect) */
65#define RTF_MTU 0x0040 /* specific MTU for this route */
66#ifndef RTF_MSS
67#define RTF_MSS RTF_MTU /* Compatibility :-( */
68#endif
69#define RTF_WINDOW 0x0080 /* per route window clamping */
70#define RTF_IRTT 0x0100 /* Initial round trip time */
71#define RTF_REJECT 0x0200 /* Reject route */
72#define RTF_NONEXTHOP 0x00200000 /* route with no nexthop */
73#endif
74
75#ifndef RTF_CACHE
76#define RTF_DEFAULT 0x00010000 /* default - learned via ND */
77#define RTF_ADDRCONF 0x00040000 /* addrconf route - RA */
78#define RTF_CACHE 0x01000000 /* cache entry */
79#endif
80
81#if defined(SIOCADDRTOLD) || defined(RTF_IRTT) /* route */
82#define HAVE_NEW_ADDRT 1
83#endif
84
85#if HAVE_NEW_ADDRT
86#define mask_in_addr(x) (((struct sockaddr_in *)&((x).rt_genmask))->sin_addr.s_addr)
87#define full_mask(x) (x)
88#else
89#define mask_in_addr(x) ((x).rt_genmask)
90#define full_mask(x) (((struct sockaddr_in *)&(x))->sin_addr.s_addr)
91#endif
92
93/* The RTACTION entries must agree with tbl_verb[] below! */
94#define RTACTION_ADD 1
95#define RTACTION_DEL 2
96
97/* For the various tbl_*[] arrays, the 1st byte is the offset to
98 * the next entry and the 2nd byte is return value. */
99
100#define NET_FLAG 1
101#define HOST_FLAG 2
102
103/* We remap '-' to '#' to avoid problems with getopt. */
104static const char tbl_hash_net_host[] ALIGN1 =
105 "\007\001#net\0"
106/* "\010\002#host\0" */
107 "\007\002#host" /* Since last, we can save a byte. */
108;
109
110#define KW_TAKES_ARG 020
111#define KW_SETS_FLAG 040
112
113#define KW_IPVx_METRIC 020
114#define KW_IPVx_NETMASK 021
115#define KW_IPVx_GATEWAY 022
116#define KW_IPVx_MSS 023
117#define KW_IPVx_WINDOW 024
118#define KW_IPVx_IRTT 025
119#define KW_IPVx_DEVICE 026
120
121#define KW_IPVx_FLAG_ONLY 040
122#define KW_IPVx_REJECT 040
123#define KW_IPVx_MOD 041
124#define KW_IPVx_DYN 042
125#define KW_IPVx_REINSTATE 043
126
127static const char tbl_ipvx[] ALIGN1 =
128 /* 020 is the "takes an arg" bit */
129#if HAVE_NEW_ADDRT
130 "\011\020metric\0"
131#endif
132 "\012\021netmask\0"
133 "\005\022gw\0"
134 "\012\022gateway\0"
135 "\006\023mss\0"
136 "\011\024window\0"
137#ifdef RTF_IRTT
138 "\007\025irtt\0"
139#endif
140 "\006\026dev\0"
141 "\011\026device\0"
142 /* 040 is the "sets a flag" bit - MUST match flags_ipvx[] values below. */
143#ifdef RTF_REJECT
144 "\011\040reject\0"
145#endif
146 "\006\041mod\0"
147 "\006\042dyn\0"
148/* "\014\043reinstate\0" */
149 "\013\043reinstate" /* Since last, we can save a byte. */
150;
151
152static const uint16_t flags_ipvx[] = { /* MUST match tbl_ipvx[] values above. */
153#ifdef RTF_REJECT
154 RTF_REJECT,
155#endif
156 RTF_MODIFIED,
157 RTF_DYNAMIC,
158 RTF_REINSTATE
159};
160
161static int kw_lookup(const char *kwtbl, char ***pargs)
162{
163 if (**pargs) {
164 do {
165 if (strcmp(kwtbl+2, **pargs) == 0) { /* Found a match. */
166 *pargs += 1;
167 if (kwtbl[1] & KW_TAKES_ARG) {
168 if (!**pargs) { /* No more args! */
169 bb_show_usage();
170 }
171 *pargs += 1; /* Calling routine will use args[-1]. */
172 }
173 return kwtbl[1];
174 }
175 kwtbl += *kwtbl;
176 } while (*kwtbl);
177 }
178 return 0;
179}
180
181/* Add or delete a route, depending on action. */
182
183static NOINLINE void INET_setroute(int action, char **args)
184{
185 /* char buffer instead of bona-fide struct avoids aliasing warning */
186 char rt_buf[sizeof(struct rtentry)];
187 struct rtentry *const rt = (void *)rt_buf;
188
189 const char *netmask = NULL;
190 int skfd, isnet, xflag;
191
192 /* Grab the -net or -host options. Remember they were transformed. */
193 xflag = kw_lookup(tbl_hash_net_host, &args);
194
195 /* If we did grab -net or -host, make sure we still have an arg left. */
196 if (*args == NULL) {
197 bb_show_usage();
198 }
199
200 /* Clean out the RTREQ structure. */
201 memset(rt, 0, sizeof(*rt));
202
203 {
204 const char *target = *args++;
205 char *prefix;
206
207 /* recognize x.x.x.x/mask format. */
208 prefix = strchr(target, '/');
209 if (prefix) {
210 int prefix_len;
211
212 prefix_len = xatoul_range(prefix+1, 0, 32);
213 mask_in_addr(*rt) = htonl( ~(0xffffffffUL >> prefix_len));
214 *prefix = '\0';
215#if HAVE_NEW_ADDRT
216 rt->rt_genmask.sa_family = AF_INET;
217#endif
218 } else {
219 /* Default netmask. */
220 netmask = "default";
221 }
222 /* Prefer hostname lookup is -host flag (xflag==1) was given. */
223 isnet = INET_resolve(target, (struct sockaddr_in *) &rt->rt_dst,
224 (xflag & HOST_FLAG));
225 if (isnet < 0) {
226 bb_error_msg_and_die("resolving %s", target);
227 }
228 if (prefix) {
229 /* do not destroy prefix for process args */
230 *prefix = '/';
231 }
232 }
233
234 if (xflag) { /* Reinit isnet if -net or -host was specified. */
235 isnet = (xflag & NET_FLAG);
236 }
237
238 /* Fill in the other fields. */
239 rt->rt_flags = ((isnet) ? RTF_UP : (RTF_UP | RTF_HOST));
240
241 while (*args) {
242 int k = kw_lookup(tbl_ipvx, &args);
243 const char *args_m1 = args[-1];
244
245 if (k & KW_IPVx_FLAG_ONLY) {
246 rt->rt_flags |= flags_ipvx[k & 3];
247 continue;
248 }
249
250#if HAVE_NEW_ADDRT
251 if (k == KW_IPVx_METRIC) {
252 rt->rt_metric = xatoul(args_m1) + 1;
253 continue;
254 }
255#endif
256
257 if (k == KW_IPVx_NETMASK) {
258 struct sockaddr mask;
259
260 if (mask_in_addr(*rt)) {
261 bb_show_usage();
262 }
263
264 netmask = args_m1;
265 isnet = INET_resolve(netmask, (struct sockaddr_in *) &mask, 0);
266 if (isnet < 0) {
267 bb_error_msg_and_die("resolving %s", netmask);
268 }
269 rt->rt_genmask = full_mask(mask);
270 continue;
271 }
272
273 if (k == KW_IPVx_GATEWAY) {
274 if (rt->rt_flags & RTF_GATEWAY) {
275 bb_show_usage();
276 }
277
278 isnet = INET_resolve(args_m1,
279 (struct sockaddr_in *) &rt->rt_gateway, 1);
280 rt->rt_flags |= RTF_GATEWAY;
281
282 if (isnet) {
283 if (isnet < 0) {
284 bb_error_msg_and_die("resolving %s", args_m1);
285 }
286 bb_error_msg_and_die("gateway %s is a NETWORK", args_m1);
287 }
288 continue;
289 }
290
291 if (k == KW_IPVx_MSS) { /* Check valid MSS bounds. */
292 rt->rt_flags |= RTF_MSS;
293 rt->rt_mss = xatoul_range(args_m1, 64, 32768);
294 continue;
295 }
296
297 if (k == KW_IPVx_WINDOW) { /* Check valid window bounds. */
298 rt->rt_flags |= RTF_WINDOW;
299 rt->rt_window = xatoul_range(args_m1, 128, INT_MAX);
300 continue;
301 }
302
303#ifdef RTF_IRTT
304 if (k == KW_IPVx_IRTT) {
305 rt->rt_flags |= RTF_IRTT;
306 rt->rt_irtt = xatoul(args_m1);
307 rt->rt_irtt *= (bb_clk_tck() / 100); /* FIXME */
308#if 0 /* FIXME: do we need to check anything of this? */
309 if (rt->rt_irtt < 1 || rt->rt_irtt > (120 * HZ)) {
310 bb_error_msg_and_die("bad irtt");
311 }
312#endif
313 continue;
314 }
315#endif
316
317 /* Device is special in that it can be the last arg specified
318 * and doesn't require the dev/device keyword in that case. */
319 if (!rt->rt_dev && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) {
320 /* Don't use args_m1 here since args may have changed! */
321 rt->rt_dev = args[-1];
322 continue;
323 }
324
325 /* Nothing matched. */
326 bb_show_usage();
327 }
328
329#ifdef RTF_REJECT
330 if ((rt->rt_flags & RTF_REJECT) && !rt->rt_dev) {
331 rt->rt_dev = (char*)"lo";
332 }
333#endif
334
335 /* sanity checks.. */
336 if (mask_in_addr(*rt)) {
337 uint32_t mask = mask_in_addr(*rt);
338
339 mask = ~ntohl(mask);
340 if ((rt->rt_flags & RTF_HOST) && mask != 0xffffffff) {
341 bb_error_msg_and_die("netmask %.8x and host route conflict",
342 (unsigned int) mask);
343 }
344 if (mask & (mask + 1)) {
345 bb_error_msg_and_die("bogus netmask %s", netmask);
346 }
347 mask = ((struct sockaddr_in *) &rt->rt_dst)->sin_addr.s_addr;
348 if (mask & ~(uint32_t)mask_in_addr(*rt)) {
349 bb_error_msg_and_die("netmask and route address conflict");
350 }
351 }
352
353 /* Fill out netmask if still unset */
354 if ((action == RTACTION_ADD) && (rt->rt_flags & RTF_HOST)) {
355 mask_in_addr(*rt) = 0xffffffff;
356 }
357
358 /* Create a socket to the INET kernel. */
359 skfd = xsocket(AF_INET, SOCK_DGRAM, 0);
360
361 if (action == RTACTION_ADD)
362 xioctl(skfd, SIOCADDRT, rt);
363 else
364 xioctl(skfd, SIOCDELRT, rt);
365
366 if (ENABLE_FEATURE_CLEAN_UP) close(skfd);
367}
368
369#if ENABLE_FEATURE_IPV6
370
371static NOINLINE void INET6_setroute(int action, char **args)
372{
373 struct sockaddr_in6 sa6;
374 struct in6_rtmsg rt;
375 int prefix_len, skfd;
376 const char *devname;
377
378 /* We know args isn't NULL from the check in route_main. */
379 const char *target = *args++;
380
381 if (strcmp(target, "default") == 0) {
382 prefix_len = 0;
383 memset(&sa6, 0, sizeof(sa6));
384 } else {
385 char *cp;
386 cp = strchr(target, '/'); /* Yes... const to non is ok. */
387 if (cp) {
388 *cp = '\0';
389 prefix_len = xatoul_range(cp + 1, 0, 128);
390 } else {
391 prefix_len = 128;
392 }
393 if (INET6_resolve(target, (struct sockaddr_in6 *) &sa6) < 0) {
394 bb_error_msg_and_die("resolving %s", target);
395 }
396 }
397
398 /* Clean out the RTREQ structure. */
399 memset(&rt, 0, sizeof(rt));
400
401 memcpy(&rt.rtmsg_dst, sa6.sin6_addr.s6_addr, sizeof(struct in6_addr));
402
403 /* Fill in the other fields. */
404 rt.rtmsg_dst_len = prefix_len;
405 rt.rtmsg_flags = ((prefix_len == 128) ? (RTF_UP|RTF_HOST) : RTF_UP);
406 rt.rtmsg_metric = 1;
407
408 devname = NULL;
409
410 while (*args) {
411 int k = kw_lookup(tbl_ipvx, &args);
412 const char *args_m1 = args[-1];
413
414 if ((k == KW_IPVx_MOD) || (k == KW_IPVx_DYN)) {
415 rt.rtmsg_flags |= flags_ipvx[k & 3];
416 continue;
417 }
418
419 if (k == KW_IPVx_METRIC) {
420 rt.rtmsg_metric = xatoul(args_m1);
421 continue;
422 }
423
424 if (k == KW_IPVx_GATEWAY) {
425 if (rt.rtmsg_flags & RTF_GATEWAY) {
426 bb_show_usage();
427 }
428
429 if (INET6_resolve(args_m1, (struct sockaddr_in6 *) &sa6) < 0) {
430 bb_error_msg_and_die("resolving %s", args_m1);
431 }
432 memcpy(&rt.rtmsg_gateway, sa6.sin6_addr.s6_addr,
433 sizeof(struct in6_addr));
434 rt.rtmsg_flags |= RTF_GATEWAY;
435 continue;
436 }
437
438 /* Device is special in that it can be the last arg specified
439 * and doesn't require the dev/device keyword in that case. */
440 if (!devname && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) {
441 /* Don't use args_m1 here since args may have changed! */
442 devname = args[-1];
443 continue;
444 }
445
446 /* Nothing matched. */
447 bb_show_usage();
448 }
449
450 /* Create a socket to the INET6 kernel. */
451 skfd = xsocket(AF_INET6, SOCK_DGRAM, 0);
452
453 rt.rtmsg_ifindex = 0;
454
455 if (devname) {
456 struct ifreq ifr;
457 memset(&ifr, 0, sizeof(ifr));
458 strncpy_IFNAMSIZ(ifr.ifr_name, devname);
459 xioctl(skfd, SIOCGIFINDEX, &ifr);
460 rt.rtmsg_ifindex = ifr.ifr_ifindex;
461 }
462
463 /* Tell the kernel to accept this route. */
464 if (action == RTACTION_ADD)
465 xioctl(skfd, SIOCADDRT, &rt);
466 else
467 xioctl(skfd, SIOCDELRT, &rt);
468
469 if (ENABLE_FEATURE_CLEAN_UP) close(skfd);
470}
471#endif
472
473static const
474IF_NOT_FEATURE_IPV6(uint16_t)
475IF_FEATURE_IPV6(unsigned)
476flagvals[] = { /* Must agree with flagchars[]. */
477 RTF_UP,
478 RTF_GATEWAY,
479 RTF_HOST,
480 RTF_REINSTATE,
481 RTF_DYNAMIC,
482 RTF_MODIFIED,
483#if ENABLE_FEATURE_IPV6
484 RTF_DEFAULT,
485 RTF_ADDRCONF,
486 RTF_CACHE,
487 RTF_REJECT,
488 RTF_NONEXTHOP, /* this one doesn't fit into 16 bits */
489#endif
490};
491/* Must agree with flagvals[]. */
492static const char flagchars[] ALIGN1 =
493 "UGHRDM"
494#if ENABLE_FEATURE_IPV6
495 "DAC!n"
496#endif
497;
498#define IPV4_MASK (RTF_UP|RTF_GATEWAY|RTF_HOST|RTF_REINSTATE|RTF_DYNAMIC|RTF_MODIFIED)
499#define IPV6_MASK (RTF_UP|RTF_GATEWAY|RTF_HOST|RTF_DEFAULT|RTF_ADDRCONF|RTF_CACHE|RTF_REJECT|RTF_NONEXTHOP)
500
501static void set_flags(char *flagstr, int flags)
502{
503 int i;
504
505 for (i = 0; (*flagstr = flagchars[i]) != 0; i++) {
506 if (flags & flagvals[i]) {
507 ++flagstr;
508 }
509 }
510}
511
512/* also used in netstat */
513void FAST_FUNC bb_displayroutes(int noresolve, int netstatfmt)
514{
515 char devname[64], flags[16], *sdest, *sgw;
516 unsigned long d, g, m;
517 int r;
518 int flgs, ref, use, metric, mtu, win, ir;
519 struct sockaddr_in s_addr;
520 struct in_addr mask;
521
522 FILE *fp = xfopen_for_read("/proc/net/route");
523
524 printf("Kernel IP routing table\n"
525 "Destination Gateway Genmask Flags %s Iface\n",
526 netstatfmt ? " MSS Window irtt" : "Metric Ref Use");
527
528 /* Skip the first line. */
529 r = fscanf(fp, "%*[^\n]\n");
530 if (r < 0) {
531 /* Empty line, read error, or EOF. Yes, if routing table
532 * is completely empty, /proc/net/route has no header.
533 */
534 goto ERROR;
535 }
536 while (1) {
537 r = fscanf(fp, "%63s%lx%lx%X%d%d%d%lx%d%d%d\n",
538 devname, &d, &g, &flgs, &ref, &use, &metric, &m,
539 &mtu, &win, &ir);
540 if (r != 11) {
541 ERROR:
542 if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */
543 break;
544 }
545 bb_perror_msg_and_die(bb_msg_read_error);
546 }
547
548 if (!(flgs & RTF_UP)) { /* Skip interfaces that are down. */
549 continue;
550 }
551
552 set_flags(flags, (flgs & IPV4_MASK));
553#ifdef RTF_REJECT
554 if (flgs & RTF_REJECT) {
555 flags[0] = '!';
556 }
557#endif
558
559 memset(&s_addr, 0, sizeof(struct sockaddr_in));
560 s_addr.sin_family = AF_INET;
561 s_addr.sin_addr.s_addr = d;
562 sdest = INET_rresolve(&s_addr, (noresolve | 0x8000), m); /* 'default' instead of '*' */
563 s_addr.sin_addr.s_addr = g;
564 sgw = INET_rresolve(&s_addr, (noresolve | 0x4000), m); /* Host instead of net */
565 mask.s_addr = m;
566 /* "%15.15s" truncates hostnames, do we really want that? */
567 printf("%-15.15s %-15.15s %-16s%-6s", sdest, sgw, inet_ntoa(mask), flags);
568 free(sdest);
569 free(sgw);
570 if (netstatfmt) {
571 printf("%5d %-5d %6d %s\n", mtu, win, ir, devname);
572 } else {
573 printf("%-6d %-2d %7d %s\n", metric, ref, use, devname);
574 }
575 }
576 fclose(fp);
577}
578
579#if ENABLE_FEATURE_IPV6
580
581static void INET6_displayroutes(void)
582{
583 char addr6[128], *naddr6;
584 /* In addr6x, we store both 40-byte ':'-delimited ipv6 addresses.
585 * We read the non-delimited strings into the tail of the buffer
586 * using fscanf and then modify the buffer by shifting forward
587 * while inserting ':'s and the nul terminator for the first string.
588 * Hence the strings are at addr6x and addr6x+40. This generates
589 * _much_ less code than the previous (upstream) approach. */
590 char addr6x[80];
591 char iface[16], flags[16];
592 int iflags, metric, refcnt, use, prefix_len, slen;
593 struct sockaddr_in6 snaddr6;
594
595 FILE *fp = xfopen_for_read("/proc/net/ipv6_route");
596
597 printf("Kernel IPv6 routing table\n%-44s%-40s"
598 "Flags Metric Ref Use Iface\n",
599 "Destination", "Next Hop");
600
601 while (1) {
602 int r;
603 r = fscanf(fp, "%32s%x%*s%x%32s%x%x%x%x%s\n",
604 addr6x+14, &prefix_len, &slen, addr6x+40+7,
605 &metric, &refcnt, &use, &iflags, iface);
606 if (r != 9) {
607 if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */
608 break;
609 }
610 ERROR:
611 bb_perror_msg_and_die(bb_msg_read_error);
612 }
613
614 /* Do the addr6x shift-and-insert changes to ':'-delimit addresses.
615 * For now, always do this to validate the proc route format, even
616 * if the interface is down. */
617 {
618 int i = 0;
619 char *p = addr6x+14;
620
621 do {
622 if (!*p) {
623 if (i == 40) { /* nul terminator for 1st address? */
624 addr6x[39] = 0; /* Fixup... need 0 instead of ':'. */
625 ++p; /* Skip and continue. */
626 continue;
627 }
628 goto ERROR;
629 }
630 addr6x[i++] = *p++;
631 if (!((i+1) % 5)) {
632 addr6x[i++] = ':';
633 }
634 } while (i < 40+28+7);
635 }
636
637 set_flags(flags, (iflags & IPV6_MASK));
638
639 r = 0;
640 while (1) {
641 inet_pton(AF_INET6, addr6x + r,
642 (struct sockaddr *) &snaddr6.sin6_addr);
643 snaddr6.sin6_family = AF_INET6;
644 naddr6 = INET6_rresolve((struct sockaddr_in6 *) &snaddr6,
645 0x0fff /* Apparently, upstream never resolves. */
646 );
647
648 if (!r) { /* 1st pass */
649 snprintf(addr6, sizeof(addr6), "%s/%d", naddr6, prefix_len);
650 r += 40;
651 free(naddr6);
652 } else { /* 2nd pass */
653 /* Print the info. */
654 printf("%-43s %-39s %-5s %-6d %-2d %7d %-8s\n",
655 addr6, naddr6, flags, metric, refcnt, use, iface);
656 free(naddr6);
657 break;
658 }
659 }
660 }
661 fclose(fp);
662}
663
664#endif
665
666#define ROUTE_OPT_A 0x01
667#define ROUTE_OPT_n 0x02
668#define ROUTE_OPT_e 0x04
669#define ROUTE_OPT_INET6 0x08 /* Not an actual option. See below. */
670
671/* 1st byte is offset to next entry offset. 2nd byte is return value. */
672/* 2nd byte matches RTACTION_* code */
673static const char tbl_verb[] ALIGN1 =
674 "\006\001add\0"
675 "\006\002del\0"
676/* "\011\002delete\0" */
677 "\010\002delete" /* Since it's last, we can save a byte. */
678;
679
680int route_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
681int route_main(int argc UNUSED_PARAM, char **argv)
682{
683 unsigned opt;
684 int what;
685 char *family;
686 char **p;
687
688 /* First, remap '-net' and '-host' to avoid getopt problems. */
689 p = argv;
690 while (*++p) {
691 if (strcmp(*p, "-net") == 0 || strcmp(*p, "-host") == 0) {
692 p[0][0] = '#';
693 }
694 }
695
696 opt = getopt32(argv, "A:ne", &family);
697
698 if ((opt & ROUTE_OPT_A) && strcmp(family, "inet") != 0) {
699#if ENABLE_FEATURE_IPV6
700 if (strcmp(family, "inet6") == 0) {
701 opt |= ROUTE_OPT_INET6; /* Set flag for ipv6. */
702 } else
703#endif
704 bb_show_usage();
705 }
706
707 argv += optind;
708
709 /* No more args means display the routing table. */
710 if (!*argv) {
711 int noresolve = (opt & ROUTE_OPT_n) ? 0x0fff : 0;
712#if ENABLE_FEATURE_IPV6
713 if (opt & ROUTE_OPT_INET6)
714 INET6_displayroutes();
715 else
716#endif
717 bb_displayroutes(noresolve, opt & ROUTE_OPT_e);
718
719 fflush_stdout_and_exit(EXIT_SUCCESS);
720 }
721
722 /* Check verb. At the moment, must be add, del, or delete. */
723 what = kw_lookup(tbl_verb, &argv);
724 if (!what || !*argv) { /* Unknown verb or no more args. */
725 bb_show_usage();
726 }
727
728#if ENABLE_FEATURE_IPV6
729 if (opt & ROUTE_OPT_INET6)
730 INET6_setroute(what, argv);
731 else
732#endif
733 INET_setroute(what, argv);
734
735 return EXIT_SUCCESS;
736}
737
generated by cgit at 2024-05-15 12:33:40 (GMT)