This commit was manufactured by cvs2svn to create tag 'busybox_1_00'.

1 files changed, 714 insertions, 0 deletions

diff --git a/busybox/networking/route.c b/busybox/networking/route.c
new file mode 100644
index 000000000..5c092f452
--- /dev/null
+++ b/busybox/networking/route.c
@@ -0,0 +1,714 @@
+/* route
+ *
+ * Similar to the standard Unix route, but with only the necessary
+ * parts for AF_INET and AF_INET6
+ *
+ * Bjorn Wesen, Axis Communications AB
+ *
+ * Author of the original route:
+ *              Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
+ *              (derived from FvK's 'route.c     1.70    01/04/94')
+ *
+ * This program is free software; you can redistribute it
+ * and/or  modify it under  the terms of  the GNU General
+ * Public  License as  published  by  the  Free  Software
+ * Foundation;  either  version 2 of the License, or  (at
+ * your option) any later version.
+ *
+ * $Id: route.c,v 1.26 2004/03/19 23:27:08 mjn3 Exp $
+ *
+ * displayroute() code added by Vladimir N. Oleynik <dzo@simtreas.ru>
+ * adjustments by Larry Doolittle  <LRDoolittle@lbl.gov>
+ *
+ * IPV6 support added by Bart Visscher <magick@linux-fan.com>
+ */
+
+/* 2004/03/09  Manuel Novoa III <mjn3@codepoet.org>
+ *
+ * Rewritten to fix several bugs, add additional error checking, and
+ * remove ridiculous amounts of bloat.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <assert.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <net/route.h>
+#include <net/if.h>
+#include "busybox.h"
+#include "inet_common.h"
+
+#ifndef RTF_UP
+/* Keep this in sync with /usr/src/linux/include/linux/route.h */
+#define RTF_UP          0x0001  /* route usable                 */
+#define RTF_GATEWAY     0x0002  /* destination is a gateway     */
+#define RTF_HOST        0x0004  /* host entry (net otherwise)   */
+#define RTF_REINSTATE   0x0008  /* reinstate route after tmout  */
+#define RTF_DYNAMIC     0x0010  /* created dyn. (by redirect)   */
+#define RTF_MODIFIED    0x0020  /* modified dyn. (by redirect)  */
+#define RTF_MTU         0x0040  /* specific MTU for this route  */
+#ifndef RTF_MSS
+#define RTF_MSS         RTF_MTU /* Compatibility :-(            */
+#endif
+#define RTF_WINDOW      0x0080  /* per route window clamping    */
+#define RTF_IRTT        0x0100  /* Initial round trip time      */
+#define RTF_REJECT      0x0200  /* Reject route                 */
+#endif
+
+#if defined (SIOCADDRTOLD) || defined (RTF_IRTT)        /* route */
+#define HAVE_NEW_ADDRT 1
+#endif
+
+#if HAVE_NEW_ADDRT
+#define mask_in_addr(x) (((struct sockaddr_in *)&((x).rt_genmask))->sin_addr.s_addr)
+#define full_mask(x) (x)
+#else
+#define mask_in_addr(x) ((x).rt_genmask)
+#define full_mask(x) (((struct sockaddr_in *)&(x))->sin_addr.s_addr)
+#endif
+
+/* The RTACTION entries must agree with tbl_verb[] below! */
+#define RTACTION_ADD            1
+#define RTACTION_DEL            2
+
+/* For the various tbl_*[] arrays, the 1st byte is the offset to
+ * the next entry and the 2nd byte is return value. */
+
+#define NET_FLAG                        1
+#define HOST_FLAG                       2
+
+/* We remap '-' to '#' to avoid problems with getopt. */
+static const char tbl_hash_net_host[] =
+        "\007\001#net\0"
+/*      "\010\002#host\0" */
+        "\007\002#host"                         /* Since last, we can save a byte. */
+;
+
+#define KW_TAKES_ARG            020
+#define KW_SETS_FLAG            040
+
+#define KW_IPVx_METRIC          020
+#define KW_IPVx_NETMASK         021
+#define KW_IPVx_GATEWAY         022
+#define KW_IPVx_MSS                     023
+#define KW_IPVx_WINDOW          024
+#define KW_IPVx_IRTT            025
+#define KW_IPVx_DEVICE          026
+
+#define KW_IPVx_FLAG_ONLY       040
+#define KW_IPVx_REJECT          040
+#define KW_IPVx_MOD                     041
+#define KW_IPVx_DYN                     042
+#define KW_IPVx_REINSTATE       043
+
+static const char tbl_ipvx[] =
+        /* 020 is the "takes an arg" bit */
+#if HAVE_NEW_ADDRT
+        "\011\020metric\0"
+#endif
+        "\012\021netmask\0"
+        "\005\022gw\0"
+        "\012\022gateway\0"
+        "\006\023mss\0"
+        "\011\024window\0"
+#ifdef RTF_IRTT
+        "\007\025irtt\0"
+#endif
+        "\006\026dev\0"
+        "\011\026device\0"
+        /* 040 is the "sets a flag" bit - MUST match flags_ipvx[] values below. */
+#ifdef RTF_REJECT
+        "\011\040reject\0"
+#endif
+        "\006\041mod\0"
+        "\006\042dyn\0"
+/*      "\014\043reinstate\0" */
+        "\013\043reinstate"                     /* Since last, we can save a byte. */
+;
+
+static const int flags_ipvx[] = { /* MUST match tbl_ipvx[] values above. */
+#ifdef RTF_REJECT
+        RTF_REJECT,
+#endif
+        RTF_MODIFIED,
+        RTF_DYNAMIC,
+        RTF_REINSTATE
+};
+
+static int kw_lookup(const char *kwtbl, char ***pargs)
+{
+        if (**pargs) {
+                do {
+                        if (strcmp(kwtbl+2, **pargs) == 0) { /* Found a match. */
+                                *pargs += 1;
+                                if (kwtbl[1] & KW_TAKES_ARG) {
+                                        if (!**pargs) { /* No more args! */
+                                                bb_show_usage();
+                                        }
+                                        *pargs += 1; /* Calling routine will use args[-1]. */
+                                }
+                                return kwtbl[1];
+                        }
+                        kwtbl += *kwtbl;
+                } while (*kwtbl);
+        }
+        return 0;
+}
+
+/* Add or delete a route, depending on action. */
+
+static void INET_setroute(int action, char **args)
+{
+        struct rtentry rt;
+        const char *netmask;
+        int skfd, isnet, xflag;
+
+        assert((action == RTACTION_ADD) || (action == RTACTION_DEL));
+
+        /* Grab the -net or -host options.  Remember they were transformed. */
+        xflag = kw_lookup(tbl_hash_net_host, &args);
+
+        /* If we did grab -net or -host, make sure we still have an arg left. */
+        if (*args == NULL) {
+                bb_show_usage();
+        }
+
+        /* Clean out the RTREQ structure. */
+        memset((char *) &rt, 0, sizeof(struct rtentry));
+
+        {
+                const char *target = *args++;
+
+                /* Prefer hostname lookup is -host flag (xflag==1) was given. */
+                isnet = INET_resolve(target, (struct sockaddr_in *) &rt.rt_dst,
+                                                         (xflag & HOST_FLAG));
+                if (isnet < 0) {
+                        bb_error_msg_and_die("resolving %s", target);
+                }
+
+        }
+
+        if (xflag) {            /* Reinit isnet if -net or -host was specified. */
+                isnet = (xflag & NET_FLAG);
+        }
+
+        /* Fill in the other fields. */
+        rt.rt_flags = ((isnet) ? RTF_UP : (RTF_UP | RTF_HOST));
+
+        netmask = bb_INET_default;
+
+        while (*args) {
+                int k = kw_lookup(tbl_ipvx, &args);
+                const char *args_m1 = args[-1];
+
+                if (k & KW_IPVx_FLAG_ONLY) {
+                        rt.rt_flags |= flags_ipvx[k & 3];
+                        continue;
+                }
+
+#if HAVE_NEW_ADDRT
+                if (k == KW_IPVx_METRIC) {
+                        rt.rt_metric = bb_xgetularg10(args_m1) + 1;
+                        continue;
+                }
+#endif
+
+                if (k == KW_IPVx_NETMASK) {
+                        struct sockaddr mask;
+
+                        if (mask_in_addr(rt)) {
+                                bb_show_usage();
+                        }
+
+                        netmask = args_m1;
+                        isnet = INET_resolve(netmask, (struct sockaddr_in *) &mask, 0);
+                        if (isnet < 0) {
+                                bb_error_msg_and_die("resolving %s", netmask);
+                        }
+                        rt.rt_genmask = full_mask(mask);
+                        continue;
+                }
+
+                if (k == KW_IPVx_GATEWAY) {
+                        if (rt.rt_flags & RTF_GATEWAY) {
+                                bb_show_usage();
+                        }
+
+                        isnet = INET_resolve(args_m1,
+                                                                 (struct sockaddr_in *) &rt.rt_gateway, 1);
+                        rt.rt_flags |= RTF_GATEWAY;
+
+                        if (isnet) {
+                                if (isnet < 0) {
+                                        bb_error_msg_and_die("resolving %s", args_m1);
+                                }
+                                bb_error_msg_and_die("gateway %s is a NETWORK", args_m1);
+                        }
+                        continue;
+                }
+
+                if (k == KW_IPVx_MSS) { /* Check valid MSS bounds. */
+                        rt.rt_flags |= RTF_MSS;
+                        rt.rt_mss = bb_xgetularg10_bnd(args_m1, 64, 32768);
+                        continue;
+                }
+
+                if (k == KW_IPVx_WINDOW) {      /* Check valid window bounds. */
+                        rt.rt_flags |= RTF_WINDOW;
+                        rt.rt_window = bb_xgetularg10_bnd(args_m1, 128, INT_MAX);
+                        continue;
+                }
+
+#ifdef RTF_IRTT
+                if (k == KW_IPVx_IRTT) {
+                        rt.rt_flags |= RTF_IRTT;
+                        rt.rt_irtt = bb_xgetularg10(args_m1);
+                        rt.rt_irtt *= (sysconf(_SC_CLK_TCK) / 100);     /* FIXME */
+#if 0                                   /* FIXME: do we need to check anything of this? */
+                        if (rt.rt_irtt < 1 || rt.rt_irtt > (120 * HZ)) {
+                                bb_error_msg_and_die("bad irtt");
+                        }
+#endif
+                        continue;
+                }
+#endif
+
+                /* Device is special in that it can be the last arg specified
+                 * and doesn't requre the dev/device keyword in that case. */
+                if (!rt.rt_dev && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) {
+                        /* Don't use args_m1 here since args may have changed! */
+                        rt.rt_dev = args[-1];
+                        continue;
+                }
+
+                /* Nothing matched. */
+                bb_show_usage();
+        }
+
+#ifdef RTF_REJECT
+        if ((rt.rt_flags & RTF_REJECT) && !rt.rt_dev) {
+                rt.rt_dev = "lo";
+        }
+#endif
+
+        /* sanity checks.. */
+        if (mask_in_addr(rt)) {
+                unsigned long mask = mask_in_addr(rt);
+
+                mask = ~ntohl(mask);
+                if ((rt.rt_flags & RTF_HOST) && mask != 0xffffffff) {
+                        bb_error_msg_and_die("netmask %.8x and host route conflict",
+                                                                 (unsigned int) mask);
+                }
+                if (mask & (mask + 1)) {
+                        bb_error_msg_and_die("bogus netmask %s", netmask);
+                }
+                mask = ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr;
+                if (mask & ~mask_in_addr(rt)) {
+                        bb_error_msg_and_die("netmask and route address conflict");
+                }
+        }
+
+        /* Fill out netmask if still unset */
+        if ((action == RTACTION_ADD) && (rt.rt_flags & RTF_HOST)) {
+                mask_in_addr(rt) = 0xffffffff;
+        }
+
+        /* Create a socket to the INET kernel. */
+        if ((skfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+                bb_perror_msg_and_die("socket");
+        }
+
+        if (ioctl(skfd, ((action==RTACTION_ADD) ? SIOCADDRT : SIOCDELRT), &rt)<0) {
+                bb_perror_msg_and_die("SIOC[ADD|DEL]RT");
+        }
+
+        /* Don't bother closing, as we're exiting after we return anyway. */
+        /* close(skfd); */
+}
+
+#ifdef CONFIG_FEATURE_IPV6
+
+static void INET6_setroute(int action, char **args)
+{
+        struct sockaddr_in6 sa6;
+        struct in6_rtmsg rt;
+        int prefix_len, skfd;
+        const char *devname;
+
+        assert((action == RTACTION_ADD) || (action == RTACTION_DEL));
+
+        {
+                /* We know args isn't NULL from the check in route_main. */
+                const char *target = *args++;
+
+                if (strcmp(target, "default") == 0) {
+                        prefix_len = 0;
+                        memset(&sa6, 0, sizeof(sa6));
+                } else {
+                        char *cp;
+                        if ((cp = strchr(target, '/'))) { /* Yes... const to non is ok. */
+                                *cp = 0;
+                                prefix_len = bb_xgetularg10_bnd(cp+1, 0, 128);
+                        } else {
+                                prefix_len = 128;
+                        }
+                        if (INET6_resolve(target, (struct sockaddr_in6 *) &sa6) < 0) {
+                                bb_error_msg_and_die("resolving %s", target);
+                        }
+                }
+        }
+
+        /* Clean out the RTREQ structure. */
+        memset((char *) &rt, 0, sizeof(struct in6_rtmsg));
+
+        memcpy(&rt.rtmsg_dst, sa6.sin6_addr.s6_addr, sizeof(struct in6_addr));
+
+        /* Fill in the other fields. */
+        rt.rtmsg_dst_len = prefix_len;
+        rt.rtmsg_flags = ((prefix_len == 128) ? (RTF_UP|RTF_HOST) : RTF_UP);
+        rt.rtmsg_metric = 1;
+
+        devname = NULL;
+
+        while (*args) {
+                int k = kw_lookup(tbl_ipvx, &args);
+                const char *args_m1 = args[-1];
+
+                if ((k == KW_IPVx_MOD) || (k == KW_IPVx_DYN)) {
+                        rt.rtmsg_flags |= flags_ipvx[k & 3];
+                        continue;
+                }
+
+                if (k == KW_IPVx_METRIC) {
+                        rt.rtmsg_metric = bb_xgetularg10(args_m1);
+                        continue;
+                }
+
+                if (k == KW_IPVx_GATEWAY) {
+                        if (rt.rtmsg_flags & RTF_GATEWAY) {
+                                bb_show_usage();
+                        }
+
+                        if (INET6_resolve(args_m1, (struct sockaddr_in6 *) &sa6) < 0) {
+                                bb_error_msg_and_die("resolving %s", args_m1);
+                        }
+                        memcpy(&rt.rtmsg_gateway, sa6.sin6_addr.s6_addr,
+                                   sizeof(struct in6_addr));
+                        rt.rtmsg_flags |= RTF_GATEWAY;
+                        continue;
+                }
+
+                /* Device is special in that it can be the last arg specified
+                 * and doesn't requre the dev/device keyword in that case. */
+                if (!devname && ((k == KW_IPVx_DEVICE) || (!k && !*++args))) {
+                        /* Don't use args_m1 here since args may have changed! */
+                        devname = args[-1];
+                        continue;
+                }
+
+                /* Nothing matched. */
+                bb_show_usage();
+        }
+
+        /* Create a socket to the INET6 kernel. */
+        if ((skfd = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
+                bb_perror_msg_and_die("socket");
+        }
+
+        rt.rtmsg_ifindex = 0;
+
+        if (devname) {
+                struct ifreq ifr;
+                memset(&ifr, 0, sizeof(ifr));
+                strcpy(ifr.ifr_name, devname);
+
+                if (ioctl(skfd, SIOGIFINDEX, &ifr) < 0) {
+                        bb_perror_msg_and_die("SIOGIFINDEX");
+                }
+                rt.rtmsg_ifindex = ifr.ifr_ifindex;
+        }
+
+        /* Tell the kernel to accept this route. */
+        if (ioctl(skfd, ((action==RTACTION_ADD) ? SIOCADDRT : SIOCDELRT), &rt)<0) {
+                bb_perror_msg_and_die("SIOC[ADD|DEL]RT");
+        }
+
+        /* Don't bother closing, as we're exiting after we return anyway. */
+        /* close(skfd); */
+}
+#endif
+
+static const unsigned int flagvals[] = { /* Must agree with flagchars[]. */
+        RTF_GATEWAY,
+        RTF_HOST,
+        RTF_REINSTATE,
+        RTF_DYNAMIC,
+        RTF_MODIFIED,
+#ifdef CONFIG_FEATURE_IPV6
+        RTF_DEFAULT,
+        RTF_ADDRCONF,
+        RTF_CACHE
+#endif
+};
+
+#define IPV4_MASK (RTF_GATEWAY|RTF_HOST|RTF_REINSTATE|RTF_DYNAMIC|RTF_MODIFIED)
+#define IPV6_MASK (RTF_GATEWAY|RTF_HOST|RTF_DEFAULT|RTF_ADDRCONF|RTF_CACHE)
+
+static const char flagchars[] =                 /* Must agree with flagvals[]. */
+        "GHRDM"
+#ifdef CONFIG_FEATURE_IPV6
+        "DAC"
+#endif
+;
+
+static
+#ifndef CONFIG_FEATURE_IPV6
+__inline
+#endif
+void set_flags(char *flagstr, int flags)
+{
+        int i;
+
+        *flagstr++ = 'U';
+
+        for (i=0 ; (*flagstr = flagchars[i]) != 0 ; i++) {
+                if (flags & flagvals[i]) {
+                        ++flagstr;
+                }
+        }
+}
+
+void displayroutes(int noresolve, int netstatfmt)
+{
+        char devname[64], flags[16], sdest[16], sgw[16];
+        unsigned long int d, g, m;
+        int flgs, ref, use, metric, mtu, win, ir;
+        struct sockaddr_in s_addr;
+        struct in_addr mask;
+
+        FILE *fp = bb_xfopen("/proc/net/route", "r");
+
+        bb_printf("Kernel IP routing table\n"
+                          "Destination     Gateway         Genmask"
+                          "         Flags %s Iface\n",
+                          netstatfmt ? "  MSS Window  irtt" : "Metric Ref    Use");
+
+        if (fscanf(fp, "%*[^\n]\n") < 0) { /* Skip the first line. */
+                goto ERROR;                /* Empty or missing line, or read error. */
+        }
+        while (1) {
+                int r;
+                r = fscanf(fp, "%63s%lx%lx%X%d%d%d%lx%d%d%d\n",
+                                   devname, &d, &g, &flgs, &ref, &use, &metric, &m,
+                                   &mtu, &win, &ir);
+                if (r != 11) {
+                        if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */
+                                break;
+                        }
+                ERROR:
+                        bb_error_msg_and_die("fscanf");
+                }
+
+                if (!(flgs & RTF_UP)) { /* Skip interfaces that are down. */
+                        continue;
+                }
+
+                set_flags(flags, (flgs & IPV4_MASK));
+#ifdef RTF_REJECT
+                if (flgs & RTF_REJECT) {
+                        flags[0] = '!';
+                }
+#endif
+
+                memset(&s_addr, 0, sizeof(struct sockaddr_in));
+                s_addr.sin_family = AF_INET;
+                s_addr.sin_addr.s_addr = d;
+                INET_rresolve(sdest, sizeof(sdest), &s_addr,
+                                          (noresolve | 0x8000), m);     /* Default instead of *. */
+
+                s_addr.sin_addr.s_addr = g;
+                INET_rresolve(sgw, sizeof(sgw), &s_addr,
+                                          (noresolve | 0x4000), m);     /* Host instead of net. */
+
+                mask.s_addr = m;
+                bb_printf("%-16s%-16s%-16s%-6s", sdest, sgw, inet_ntoa(mask), flags);
+                if (netstatfmt) {
+                        bb_printf("%5d %-5d %6d %s\n", mtu, win, ir, devname);
+                } else {
+                        bb_printf("%-6d %-2d %7d %s\n", metric, ref, use, devname);
+                }
+        }
+}
+
+#ifdef CONFIG_FEATURE_IPV6
+
+static void INET6_displayroutes(int noresolve)
+{
+        char addr6[128], naddr6[128];
+        /* In addr6x, we store both 40-byte ':'-delimited ipv6 addresses.
+         * We read the non-delimited strings into the tail of the buffer
+         * using fscanf and then modify the buffer by shifting forward
+         * while inserting ':'s and the nul terminator for the first string.
+         * Hence the strings are at addr6x and addr6x+40.  This generates
+         * _much_ less code than the previous (upstream) approach. */
+        char addr6x[80];
+        char iface[16], flags[16];
+        int iflags, metric, refcnt, use, prefix_len, slen;
+        struct sockaddr_in6 snaddr6;
+
+        FILE *fp = bb_xfopen("/proc/net/ipv6_route", "r");
+
+        bb_printf("Kernel IPv6 routing table\n%-44s%-40s"
+                          "Flags Metric Ref    Use Iface\n",
+                          "Destination", "Next Hop");
+
+        while (1) {
+                int r;
+                r = fscanf(fp, "%32s%x%*s%x%32s%x%x%x%x%s\n",
+                                   addr6x+14, &prefix_len, &slen, addr6x+40+7,
+                                   &metric, &use, &refcnt, &iflags, iface);
+                if (r != 9) {
+                        if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */
+                                break;
+                        }
+                ERROR:
+                        bb_error_msg_and_die("fscanf");
+                }
+
+                /* Do the addr6x shift-and-insert changes to ':'-delimit addresses.
+                 * For now, always do this to validate the proc route format, even
+                 * if the interface is down. */
+                {
+                        int i = 0;
+                        char *p = addr6x+14;
+
+                        do {
+                                if (!*p) {
+                                        if (i==40) { /* nul terminator for 1st address? */
+                                                addr6x[39] = 0; /* Fixup... need 0 instead of ':'. */
+                                                ++p;    /* Skip and continue. */
+                                                continue;
+                                        }
+                                        goto ERROR;
+                                }
+                                addr6x[i++] = *p++;
+                                if (!((i+1)%5)) {
+                                        addr6x[i++] = ':';
+                                }
+                        } while (i < 40+28+7);
+                }
+
+                if (!(iflags & RTF_UP)) { /* Skip interfaces that are down. */
+                        continue;
+                }
+
+                set_flags(flags, (iflags & IPV6_MASK));
+
+                r = 0;
+                do {
+                        inet_pton(AF_INET6, addr6x + r,
+                                          (struct sockaddr *) &snaddr6.sin6_addr);
+                        snaddr6.sin6_family = AF_INET6;
+                        INET6_rresolve(naddr6, sizeof(naddr6),
+                                                   (struct sockaddr_in6 *) &snaddr6,
+#if 0
+                                                   (noresolve | 0x8000) /* Default instead of *. */
+#else
+                                                   0x0fff /* Apparently, upstream never resolves. */
+#endif
+                                                   );
+
+                        if (!r) {                       /* 1st pass */
+                                snprintf(addr6, sizeof(addr6), "%s/%d", naddr6, prefix_len);
+                                r += 40;
+                        } else {                        /* 2nd pass */
+                                /* Print the info. */
+                                bb_printf("%-43s %-39s %-5s %-6d %-2d %7d %-8s\n",
+                                                  addr6, naddr6, flags, metric, refcnt, use, iface);
+                                break;
+                        }
+                } while (1);
+        }
+}
+
+#endif
+
+#define ROUTE_OPT_A                     0x01
+#define ROUTE_OPT_n                     0x02
+#define ROUTE_OPT_e                     0x04
+#define ROUTE_OPT_INET6         0x08 /* Not an actual option. See below. */
+
+/* 1st byte is offset to next entry offset.  2nd byte is return value. */
+static const char tbl_verb[] =  /* 2nd byte matches RTACTION_* code */
+        "\006\001add\0"
+        "\006\002del\0"
+/*      "\011\002delete\0" */
+        "\010\002delete"                        /* Since last, we can save a byte. */
+;
+
+int route_main(int argc, char **argv)
+{
+        unsigned long opt;
+        int what;
+        char *family;
+
+        /* First, remap '-net' and '-host' to avoid getopt problems. */
+        {
+                char **p = argv;
+
+                while (*++p) {
+                        if ((strcmp(*p, "-net") == 0) || (strcmp(*p, "-host") == 0)) {
+                                p[0][0] = '#';
+                        }
+                }
+        }
+
+        opt = bb_getopt_ulflags(argc, argv, "A:ne", &family);
+
+        if ((opt & ROUTE_OPT_A) && strcmp(family, "inet")) {
+#ifdef CONFIG_FEATURE_IPV6
+                if (strcmp(family, "inet6") == 0) {
+                        opt |= ROUTE_OPT_INET6; /* Set flag for ipv6. */
+                } else
+#endif
+                bb_show_usage();
+        }
+
+        argv += optind;
+
+        /* No more args means display the routing table. */
+        if (!*argv) {
+                int noresolve = (opt & ROUTE_OPT_n) ? 0x0fff : 0;
+#ifdef CONFIG_FEATURE_IPV6
+                if (opt & ROUTE_OPT_INET6)
+                        INET6_displayroutes(noresolve);
+                else
+#endif
+                        displayroutes(noresolve, opt & ROUTE_OPT_e);
+
+                bb_xferror_stdout();
+                bb_fflush_stdout_and_exit(EXIT_SUCCESS);
+        }
+
+        /* Check verb.  At the moment, must be add, del, or delete. */
+        what = kw_lookup(tbl_verb, &argv);
+        if (!what || !*argv) {          /* Unknown verb or no more args. */
+                bb_show_usage();
+        }
+
+#ifdef CONFIG_FEATURE_IPV6
+        if (opt & ROUTE_OPT_INET6)
+                INET6_setroute(what, argv);
+        else
+#endif
+                INET_setroute(what, argv);
+
+        return EXIT_SUCCESS;
+}