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/*

 *  $Id: rtems_showroute.c,v 1.2 2001-09-27 12:02:00 chris Exp $

 */

#include <sys/param.h>

#include <sys/queue.h>

#include <sys/systm.h>

#include <sys/kernel.h>

#include <sys/sysctl.h>

#include <sys/proc.h>

#include <sys/mbuf.h>

#include <sys/socket.h>

#include <sys/socketvar.h>

#include <sys/domain.h>

#include <net/if.h>

#include <net/if_dl.h>

#include <net/route.h>

#include <netinet/in.h>

#include <arpa/inet.h>

/*

 * We'll use the application versions of realloc and free.

 */

#undef free

#undef malloc

#include <stdlib.h>

/*

 * Information per route

 */

struct rinfo {

        struct sockaddr dst;

        union {

                struct sockaddr         sa;

                struct sockaddr_in      sin;

                struct sockaddr_dl      sdl;

        } un;

        unsigned long   pksent;

        unsigned long   expire;

        int             flags;

        char            ifname[16];

        short           ifunit;

        short           refcnt;

};

/*

 * Information per display

 */

struct dinfo {

        int             capacity;

        int             count;

        struct rinfo    *routes;

};

/*

 * Copy address

 */

static void

copyAddress (void *to, void *from, int tolen)

{

        int ncopy;

        struct sockaddr dummy;

        if (from == NULL) {

                /*

                 * Create a fake address of unspecified type

                 */

                from = &dummy;

                dummy.sa_len = 4;

                dummy.sa_family = AF_UNSPEC;

        }

        ncopy = ((struct sockaddr *)from)->sa_len;

        if (ncopy > tolen)

                ncopy = tolen;

        memcpy (to, from, ncopy);

}

/*

 * Package everything up before printing it.

 * We don't want to block all network operations till

 * the printing completes!

 */

static int

show_inet_route (rn, vw)

        struct radix_node *rn;

        void *vw;

{

        struct rtentry *rt = (struct rtentry *)rn;

        struct ifnet *ifp;

        struct dinfo *dp = (struct dinfo *)vw;

        struct rinfo *r;

        /*

         * Get a pointer to a new route info structure

         */

        if (dp->count >= dp->capacity) {

                r = realloc (dp->routes, (sizeof *r) * (dp->capacity + 20));

                if (r == 0)

                        return ENOMEM;

                dp->capacity += 20;

                dp->routes = r;

        }

        r = dp->routes + dp->count++;

        /*

         * Fill in the route info structure

         */

        copyAddress (&r->dst, rt_key(rt), sizeof r->dst);

        if (rt->rt_flags & (RTF_GATEWAY | RTF_HOST)) {

                copyAddress (&r->un, rt->rt_gateway, sizeof r->un);

        }

        else {

                /*

                 * Create a fake address to hold the mask

                 */

                struct sockaddr_in dummy;

                dummy.sin_family = AF_INET;

                dummy.sin_len = sizeof dummy;

                dummy.sin_addr = ((struct sockaddr_in *)rt_mask(rt))->sin_addr;

                copyAddress (&r->un, &dummy, sizeof r->un);

        }

        r->flags = rt->rt_flags;

        r->refcnt = rt->rt_refcnt;

        r->pksent = rt->rt_rmx.rmx_pksent;

        r->expire = rt->rt_rmx.rmx_expire;

        ifp = rt->rt_ifp;

        strncpy (r->ifname, ifp->if_name, sizeof r->ifname);

        r->ifunit = ifp->if_unit;

        return 0;

}

/*

 * Convert link address to ASCII

 */

static char *

link_ascii (struct sockaddr_dl *sdl, char *buf, int bufsize)

{

        char *cp;

        int i;

        int first = 1;

        int nleft = sdl->sdl_alen;

        unsigned char *ap = LLADDR (sdl);

        static const char hextab[16] = "0123456789ABCDEF";

        cp = buf;

        while (nleft && (bufsize > 4)) {

                if (first) {

                        first = 0;

                }

                else {

                        *cp++ = ':';

                        bufsize--;

                }

                i = *ap++;

                *cp++ = hextab[(i >> 4) & 0xf];

                *cp++ = hextab[i & 0xf];

                nleft--;

                bufsize -= 2;

        }

        *cp = '\0';

        return buf;

}

void

rtems_bsdnet_show_inet_routes (void)

{

        struct radix_node_head *rnh;

        struct dinfo d;

        struct rinfo *r;

        int i, error;

        /*

         * For now we'll handle only AF_INET

         */

        rnh = rt_tables[AF_INET];

        if (!rnh)

                return;

        d.count = d.capacity = 0;

        d.routes = NULL;

        rtems_bsdnet_semaphore_obtain ();

        error = rnh->rnh_walktree(rnh, show_inet_route, &d);

        rtems_bsdnet_semaphore_release ();

        if (error) {

                printf ("Can't get route info: %s\n", strerror (error));

                return;

        }

        if (d.count == 0) {

                printf ("No routes!\n");

                return;

        }

        printf ("Destination     Gateway/Mask/Hw    Flags     Refs     Use Expire Interface\n");

        for (i = 0, r = d.routes ; i < d.count ; i++, r++) {

                char buf[30];

                char *cp, *fc, flagbuf[10];

                const char *addr;

                unsigned long flagbit;

                struct sockaddr_in *sin;

                sin = (struct sockaddr_in *)&r->dst;

                if (sin->sin_addr.s_addr == INADDR_ANY)

                        addr = "default";

                else

                        addr = inet_ntop (AF_INET, &sin->sin_addr, buf, sizeof buf);

                printf ("%-16s", addr);

                switch (r->un.sa.sa_family) {

                case AF_INET:

                        addr = inet_ntop (AF_INET, &r->un.sin.sin_addr, buf, sizeof buf);

                        break;

                case AF_LINK:

                        addr = link_ascii (&r->un.sdl, buf, sizeof buf);

                        break;

                default:

                        addr = "";

                        break;

                }

                printf ("%-19s", addr);

                fc = "UGHRDM   XLS";

                for (flagbit = 0x1, cp = flagbuf ; *fc ; flagbit <<= 1, fc++) {

                        if ((r->flags & flagbit) && (*fc != ' '))

                                *cp++ = *fc;

                }

                *cp = '\0';

                printf ("%-10s%3d%9ld%7ld %.*s%d\n", flagbuf,

                                        r->refcnt, r->pksent,

                                        r->expire,

                                        (int)sizeof r->ifname, r->ifname,

                                        r->ifunit);

        }

        free (d.routes);

}