struct sockaddr_at  sat;
    int                 s, len = sizeof(sat), occ = 500;
    char                prev_zero[sizeof(sat.sat_zero)] = { 0 };

    s = socket(AF_APPLETALK, SOCK_DGRAM, 0);
    if ( s == -1 )
    {
        perror("socket");
        return EXIT_FAILURE;
    }

    memset(&sat, 0, sizeof(sat));
    sat.sat_family = AF_APPLETALK;
    sat.sat_addr.s_net = htons(ATADDR_ANYNET);
    sat.sat_addr.s_node = ATADDR_ANYNODE;
    sat.sat_port = ATADDR_ANYPORT;

    if ( bind(s, (struct sockaddr *) &sat, len) < 0 )   <<<<<<
    {
        perror("bind");
        return EXIT_FAILURE;
    }