3 * Similar to the standard Unix route, but with only the necessary
4 * parts for AF_INET and AF_INET6
6 * Bjorn Wesen, Axis Communications AB
8 * Author of the original route:
9 * Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
10 * (derived from FvK's 'route.c 1.70 01/04/94')
12 * This program is free software; you can redistribute it
13 * and/or modify it under the terms of the GNU General
14 * Public License as published by the Free Software
15 * Foundation; either version 2 of the License, or (at
16 * your option) any later version.
18 * $Id: route.c,v 1.17 2002/07/03 11:46:34 andersen Exp $
20 * displayroute() code added by Vladimir N. Oleynik <dzo@simtreas.ru>
21 * adjustments by Larry Doolittle <LRDoolittle@lbl.gov>
23 * IPV6 support added by Bart Visscher <magick@linux-fan.com>
26 #include <sys/types.h>
27 #include <sys/ioctl.h>
28 #include "inet_common.h"
29 #include <net/route.h>
31 #include <linux/param.h> // HZ
44 #define RTACTION_ADD 1
45 #define RTACTION_DEL 2
46 #define RTACTION_HELP 3
47 #define RTACTION_FLUSH 4
48 #define RTACTION_SHOW 5
59 #if defined (SIOCADDRTOLD) || defined (RTF_IRTT) /* route */
60 #define HAVE_NEW_ADDRT 1
62 #ifdef RTF_IRTT /* route */
63 #define HAVE_RTF_IRTT 1
65 #ifdef RTF_REJECT /* route */
66 #define HAVE_RTF_REJECT 1
70 #define mask_in_addr(x) (((struct sockaddr_in *)&((x).rt_genmask))->sin_addr.s_addr)
71 #define full_mask(x) (x)
73 #define mask_in_addr(x) ((x).rt_genmask)
74 #define full_mask(x) (((struct sockaddr_in *)&(x))->sin_addr.s_addr)
79 /* add or delete a route depending on action */
82 INET_setroute(int action, int options, char **args)
85 char target[128], gateway[128] = "NONE";
86 const char *netmask = bb_INET_default;
94 if (strcmp(*args, "-net")==0) {
97 } else if (strcmp(*args, "-host")==0) {
103 safe_strncpy(target, *args++, (sizeof target));
105 /* Clean out the RTREQ structure. */
106 memset((char *) &rt, 0, sizeof(struct rtentry));
109 if ((isnet = INET_resolve(target, (struct sockaddr_in *)&rt.rt_dst, xflag!=1)) < 0) {
110 error_msg(_("can't resolve %s"), target);
111 return EXIT_FAILURE; /* XXX change to E_something */
127 /* Fill in the other fields. */
128 rt.rt_flags = (RTF_UP | RTF_HOST);
130 rt.rt_flags &= ~RTF_HOST;
133 if (strcmp(*args, "metric")==0) {
137 if (!*args || !isdigit(**args))
139 metric = atoi(*args);
141 rt.rt_metric = metric + 1;
143 ENOSUPP("inet_setroute", "NEW_ADDRT (metric)"); /* XXX Fixme */
149 if (strcmp(*args, "netmask")==0) {
150 struct sockaddr mask;
153 if (!*args || mask_in_addr(rt))
156 if ((isnet = INET_resolve(netmask, (struct sockaddr_in *)&mask, 0)) < 0) {
157 error_msg(_("can't resolve netmask %s"), netmask);
160 rt.rt_genmask = full_mask(mask);
165 if (strcmp(*args, "gw")==0 || strcmp(*args, "gateway")==0) {
169 if (rt.rt_flags & RTF_GATEWAY)
171 safe_strncpy(gateway, *args, (sizeof gateway));
172 if ((isnet = INET_resolve(gateway, (struct sockaddr_in *)&rt.rt_gateway, 1)) < 0) {
173 error_msg(_("can't resolve gw %s"), gateway);
178 _("%s: cannot use a NETWORK as gateway!"),
182 rt.rt_flags |= RTF_GATEWAY;
187 if (strcmp(*args, "mss")==0) {
189 rt.rt_flags |= RTF_MSS;
192 rt.rt_mss = atoi(*args);
194 if (rt.rt_mss < 64 || rt.rt_mss > 32768) {
195 error_msg(_("Invalid MSS."));
201 if (strcmp(*args, "window")==0) {
205 rt.rt_flags |= RTF_WINDOW;
206 rt.rt_window = atoi(*args);
208 if (rt.rt_window < 128) {
209 error_msg(_("Invalid window."));
215 if (strcmp(*args, "irtt")==0) {
221 rt.rt_flags |= RTF_IRTT;
222 rt.rt_irtt = atoi(*(args - 1));
223 rt.rt_irtt *= (HZ / 100); /* FIXME */
224 #if 0 /* FIXME: do we need to check anything of this? */
225 if (rt.rt_irtt < 1 || rt.rt_irtt > (120 * HZ)) {
226 error_msg(_("Invalid initial rtt."));
231 ENOSUPP("inet_setroute", "RTF_IRTT"); /* XXX Fixme */
236 if (strcmp(*args, "reject")==0) {
239 rt.rt_flags |= RTF_REJECT;
241 ENOSUPP("inet_setroute", "RTF_REJECT"); /* XXX Fixme */
245 if (strcmp(*args, "mod")==0) {
247 rt.rt_flags |= RTF_MODIFIED;
250 if (strcmp(*args, "dyn")==0) {
252 rt.rt_flags |= RTF_DYNAMIC;
255 if (strcmp(*args, "reinstate")==0) {
257 rt.rt_flags |= RTF_REINSTATE;
260 if (strcmp(*args, "device")==0 || strcmp(*args, "dev")==0) {
262 if (rt.rt_dev || *args == NULL)
267 /* nothing matches */
271 show_usage(); /* must be last to catch typos */
278 if ((rt.rt_flags & RTF_REJECT) && !rt.rt_dev)
282 /* sanity checks.. */
283 if (mask_in_addr(rt)) {
284 unsigned long mask = mask_in_addr(rt);
286 if ((rt.rt_flags & RTF_HOST) && mask != 0xffffffff) {
288 _("netmask %.8x doesn't make sense with host route"),
292 if (mask & (mask + 1)) {
293 error_msg(_("bogus netmask %s"), netmask);
296 mask = ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr;
297 if (mask & ~mask_in_addr(rt)) {
298 error_msg(_("netmask doesn't match route address"));
302 /* Fill out netmask if still unset */
303 if ((action == RTACTION_ADD) && rt.rt_flags & RTF_HOST)
304 mask_in_addr(rt) = 0xffffffff;
306 /* Create a socket to the INET kernel. */
307 if ((skfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
311 /* Tell the kernel to accept this route. */
312 if (action == RTACTION_DEL) {
313 if (ioctl(skfd, SIOCDELRT, &rt) < 0) {
319 if (ioctl(skfd, SIOCADDRT, &rt) < 0) {
326 /* Close the socket. */
331 #if CONFIG_FEATURE_IPV6
332 static int INET6_setroute(int action, int options, char **args)
336 struct sockaddr_in6 sa6;
337 char target[128], gateway[128] = "NONE";
338 int metric, prefix_len;
339 char *devname = NULL;
346 strcpy(target, *args++);
347 if (!strcmp(target, "default")) {
349 memset(&sa6, 0, sizeof(sa6));
351 if ((cp = strchr(target, '/'))) {
352 prefix_len = atol(cp + 1);
353 if ((prefix_len < 0) || (prefix_len > 128))
359 if (INET6_resolve(target, (struct sockaddr_in6 *)&sa6) < 0) {
360 error_msg(_("can't resolve %s"), target);
361 return EXIT_FAILURE; /* XXX change to E_something */
365 /* Clean out the RTREQ structure. */
366 memset((char *) &rt, 0, sizeof(struct in6_rtmsg));
368 memcpy(&rt.rtmsg_dst, sa6.sin6_addr.s6_addr, sizeof(struct in6_addr));
370 /* Fill in the other fields. */
371 rt.rtmsg_flags = RTF_UP;
372 if (prefix_len == 128)
373 rt.rtmsg_flags |= RTF_HOST;
375 rt.rtmsg_dst_len = prefix_len;
378 if (!strcmp(*args, "metric")) {
381 if (!*args || !isdigit(**args))
383 metric = atoi(*args);
384 rt.rtmsg_metric = metric;
388 if (!strcmp(*args, "gw") || !strcmp(*args, "gateway")) {
392 if (rt.rtmsg_flags & RTF_GATEWAY)
394 strcpy(gateway, *args);
395 if (INET6_resolve(gateway, (struct sockaddr_in6 *)&sa6) < 0) {
396 error_msg(_("can't resolve gw %s"), gateway);
399 memcpy(&rt.rtmsg_gateway, sa6.sin6_addr.s6_addr,
400 sizeof(struct in6_addr));
401 rt.rtmsg_flags |= RTF_GATEWAY;
405 if (!strcmp(*args, "mod")) {
407 rt.rtmsg_flags |= RTF_MODIFIED;
410 if (!strcmp(*args, "dyn")) {
412 rt.rtmsg_flags |= RTF_DYNAMIC;
415 if (!strcmp(*args, "device") || !strcmp(*args, "dev")) {
426 /* Create a socket to the INET6 kernel. */
427 if ((skfd = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
432 memset(&ifr, 0, sizeof(ifr));
433 strcpy(ifr.ifr_name, devname);
435 if (ioctl(skfd, SIOGIFINDEX, &ifr) < 0) {
436 perror("SIOGIFINDEX");
439 rt.rtmsg_ifindex = ifr.ifr_ifindex;
441 rt.rtmsg_ifindex = 0;
443 /* Tell the kernel to accept this route. */
444 if (action == RTACTION_DEL) {
445 if (ioctl(skfd, SIOCDELRT, &rt) < 0) {
451 if (ioctl(skfd, SIOCADDRT, &rt) < 0) {
458 /* Close the socket. */
465 /* Keep this in sync with /usr/src/linux/include/linux/route.h */
466 #define RTF_UP 0x0001 /* route usable */
467 #define RTF_GATEWAY 0x0002 /* destination is a gateway */
468 #define RTF_HOST 0x0004 /* host entry (net otherwise) */
469 #define RTF_REINSTATE 0x0008 /* reinstate route after tmout */
470 #define RTF_DYNAMIC 0x0010 /* created dyn. (by redirect) */
471 #define RTF_MODIFIED 0x0020 /* modified dyn. (by redirect) */
472 #define RTF_MTU 0x0040 /* specific MTU for this route */
474 #define RTF_MSS RTF_MTU /* Compatibility :-( */
476 #define RTF_WINDOW 0x0080 /* per route window clamping */
477 #define RTF_IRTT 0x0100 /* Initial round trip time */
478 #define RTF_REJECT 0x0200 /* Reject route */
481 void displayroutes(int noresolve, int netstatfmt)
488 int flgs, ref, use, metric, mtu, win, ir;
490 unsigned long int d,g,m;
492 char sdest[16], sgw[16];
494 FILE *fp = xfopen("/proc/net/route", "r");
499 while( fgets(buff, sizeof(buff), fp) != NULL ) {
503 struct sockaddr_in s_addr;
505 while(buff[ifl]!=' ' && buff[ifl]!='\t' && buff[ifl]!='\0')
507 buff[ifl]=0; /* interface */
508 if(sscanf(buff+ifl+1, "%lx%lx%X%d%d%d%lx%d%d%d",
509 &d, &g, &flgs, &ref, &use, &metric, &m, &mtu, &win, &ir )!=10) {
510 error_msg_and_die( "Unsuported kernel route format\n");
513 printf("Kernel IP routing table\n");
514 printf("Destination Gateway Genmask Flags %s Iface\n",
515 netstatfmt ? " MSS Window irtt" : "Metric Ref Use");
517 ifl = 0; /* parse flags */
527 if(flgs&RTF_REINSTATE)
531 if(flgs&RTF_MODIFIED)
537 memset(&s_addr, 0, sizeof(struct sockaddr_in));
538 s_addr.sin_family = AF_INET;
539 s_addr.sin_addr = dest;
540 numeric = noresolve | 0x8000; /* default instead of * */
541 INET_rresolve(sdest, sizeof(sdest), &s_addr, numeric, m);
542 numeric = noresolve | 0x4000; /* host instead of net */
543 s_addr.sin_addr = gw;
544 INET_rresolve(sgw, sizeof(sgw), &s_addr, numeric, m);
546 printf("%-16s%-16s%-16s%-6s", sdest, sgw, inet_ntoa(mask), flags);
548 printf("%5d %-5d %6d %s\n", mtu, win, ir, buff);
550 printf("%-6d %-2d %7d %s\n", metric, ref, use, buff);
557 #if CONFIG_FEATURE_IPV6
558 static void INET6_displayroutes(int noresolve)
561 char iface[16], flags[16];
562 char addr6[128], naddr6[128];
563 struct sockaddr_in6 saddr6, snaddr6;
564 int iflags, metric, refcnt, use, prefix_len, slen;
567 char addr6p[8][5], saddr6p[8][5], naddr6p[8][5];
569 FILE *fp = xfopen("/proc/net/ipv6_route", "r");
574 numeric = noresolve | 0x8000; /* default instead of * */
576 printf("Kernel IPv6 routing table\n"
579 "Flags Metric Ref Use Iface\n");
581 while( fgets(buff, sizeof(buff), fp) != NULL ) {
584 if(sscanf(buff, "%4s%4s%4s%4s%4s%4s%4s%4s %02x "
585 "%4s%4s%4s%4s%4s%4s%4s%4s %02x "
586 "%4s%4s%4s%4s%4s%4s%4s%4s %08x %08x %08x %08x %s\n",
587 addr6p[0], addr6p[1], addr6p[2], addr6p[3],
588 addr6p[4], addr6p[5], addr6p[6], addr6p[7],
590 saddr6p[0], saddr6p[1], saddr6p[2], saddr6p[3],
591 saddr6p[4], saddr6p[5], saddr6p[6], saddr6p[7],
593 naddr6p[0], naddr6p[1], naddr6p[2], naddr6p[3],
594 naddr6p[4], naddr6p[5], naddr6p[6], naddr6p[7],
595 &metric, &use, &refcnt, &iflags, iface)!=31) {
596 error_msg_and_die( "Unsuported kernel route format\n");
599 ifl = 1; /* parse flags */
600 if (!(iflags & RTF_UP))
602 if (iflags & RTF_GATEWAY)
604 if (iflags & RTF_HOST)
606 if (iflags & RTF_DEFAULT)
608 if (iflags & RTF_ADDRCONF)
610 if (iflags & RTF_CACHE)
614 /* Fetch and resolve the target address. */
615 snprintf(addr6, sizeof(addr6), "%s:%s:%s:%s:%s:%s:%s:%s",
616 addr6p[0], addr6p[1], addr6p[2], addr6p[3],
617 addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
618 inet_pton(AF_INET6, addr6, (struct sockaddr *) &saddr6.sin6_addr);
619 saddr6.sin6_family=AF_INET6;
621 INET6_rresolve(addr6, sizeof(addr6), (struct sockaddr_in6 *) &saddr6, numeric);
622 snprintf(addr6, sizeof(addr6), "%s/%d", addr6, prefix_len);
624 /* Fetch and resolve the nexthop address. */
625 snprintf(naddr6, sizeof(naddr6), "%s:%s:%s:%s:%s:%s:%s:%s",
626 naddr6p[0], naddr6p[1], naddr6p[2], naddr6p[3],
627 naddr6p[4], naddr6p[5], naddr6p[6], naddr6p[7]);
628 inet_pton(AF_INET6, naddr6, (struct sockaddr *) &snaddr6.sin6_addr);
629 snaddr6.sin6_family=AF_INET6;
631 INET6_rresolve(naddr6, sizeof(naddr6), (struct sockaddr_in6 *) &snaddr6, numeric);
633 /* Print the info. */
634 printf("%-43s %-39s %-5s %-6d %-2d %7d %-8s\n",
635 addr6, naddr6, flags, metric, refcnt, use, iface);
640 int route_main(int argc, char **argv)
644 #if CONFIG_FEATURE_IPV6
648 if ( !argv [1] || ( argv [1][0] == '-' )) {
653 while ((opt = getopt(argc, argv, "A:ne")) > 0) {
662 #if CONFIG_FEATURE_IPV6
663 if (strcmp(optarg, "inet6")==0)
672 #if CONFIG_FEATURE_IPV6
674 INET6_displayroutes(*argv != NULL);
677 displayroutes ( noresolve, extended );
681 if (strcmp( argv [1], "add")==0)
683 else if (strcmp( argv [1], "del")==0 || strcmp( argv [1], "delete")==0)
685 else if (strcmp( argv [1], "flush")==0)
686 what = RTACTION_FLUSH;
691 #if CONFIG_FEATURE_IPV6
693 return INET6_setroute(what, 0, argv+2);
695 return INET_setroute(what, 0, argv+2 );