Function ff_rtioctl

lib/ff_route.c:1032–1233

}

int
ff_rtioctl(int fibnum, void *data, unsigned *plen, unsigned maxlen)
{
    struct rt_msghdr *rtm = NULL;
    struct rtentry *rt = NULL;
    struct rt_addrinfo info;
    struct epoch_tracker et;
#ifdef INET6
    struct sockaddr_storage ss;
    struct sockaddr_in6 *sin6;
    int i, rti_need_deembed = 0;
#endif
    int alloc_len = 0, len, error = 0;
    sa_family_t saf = AF_UNSPEC;
    struct rib_cmd_info rc;
    struct nhop_object *nh;

#define senderr(e) { error = e; goto flush;}

    len = *plen;

    /*
     * Most of current messages are in range 200-240 bytes,
     * minimize possible re-allocation on reply using larger size
     * buffer aligned on 1k boundaty.
     */
    alloc_len = roundup2(len, 1024);
    if ((rtm = malloc(alloc_len, M_TEMP, M_NOWAIT)) == NULL)
        senderr(ENOBUFS);

    bcopy(data, (caddr_t)rtm, len);

    if (len < sizeof(*rtm) || len != rtm->rtm_msglen)
        senderr(EINVAL);

    bzero(&info, sizeof(info));
    nh = NULL;

    if (rtm->rtm_version != RTM_VERSION) {
        /* Do not touch message since format is unknown */
        free(rtm, M_TEMP);
        rtm = NULL;
        senderr(EPROTONOSUPPORT);
    }

    /*
     * Starting from here, it is possible
     * to alter original message and insert
     * caller PID and error value.
     */

    if ((error = fill_addrinfo(rtm, len, fibnum, &info)) != 0) {
        senderr(error);
    }

    saf = info.rti_info[RTAX_DST]->sa_family;

    /* support for new ARP code */