source: rtems/c/src/exec/libnetworking/rtems/rtems_showroute.c @ 39e6e65a

#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/route.h>

#include <netinet/in.h>

/*
 * We'll use the application versions of malloc and free.
 */
#undef malloc
#undef free
/*
 * Information per route
 */
struct rinfo {
        struct in_addr  dst;
        struct in_addr  gw_mask;
        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;
};

/*
 * 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
         */
        r->dst = ((struct sockaddr_in *)rt_key(rt))->sin_addr;
        if (rt->rt_flags & RTF_GATEWAY)
                r->gw_mask = ((struct sockaddr_in *)rt->rt_gateway)->sin_addr;
        else if (!(rt->rt_flags & RTF_HOST))
                r->gw_mask = ((struct sockaddr_in *)rt_mask(rt))->sin_addr;
        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;
}

/*
 * Reentrant version of inet_ntoa
 */
char *
inet_ntoa_r (struct in_addr ina, char *buf)
{
        unsigned char *ucp = (unsigned char *)&ina;

        sprintf (buf, "%d.%d.%d.%d",
                                ucp[0] & 0xff,
                                ucp[1] & 0xff,
                                ucp[2] & 0xff,
                                ucp[3] & 0xff);
                                                                                        return buf;
}

void
rtems_bsdnet_show_inet_routes (void)
{
        struct radix_node_head *rnh;
        struct dinfo d;
        struct rinfo *r;
        int i, error;

        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    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];
                unsigned long flagbit;

                if (r->dst.s_addr == INADDR_ANY)
                        cp = "default";
                else
                        cp = inet_ntoa_r (r->dst, buf);
                printf ("%-16s", cp);
                if (!(r->flags & RTF_HOST))
                        cp = inet_ntoa_r (r->gw_mask, buf);
                else
                        cp = "";
                printf ("%-16s", cp);
                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);
}