Modify Bro's conn_uid inline

bro_conn_uid_modify.bro

export {
    global g_rolling_conn_counter: int = 0;
    global probeid: int = 12345;
}

event new_connection(c: connection) &priority=20
{
    local uid_1 = fmt("%08x", to_int(strftime("%s", c$start_time)));
    local uid_2 = fmt("%08x", g_rolling_conn_counter);
    local uid_3 = fmt("%08x", probeid);
    if (g_rolling_conn_counter == 0xFFFFFFFE) {
    	g_rolling_conn_counter = 0;
    } else {
    	g_rolling_conn_counter += 1;                               
    }
    c$uid = string_cat(uid_1, uid_2, uid_3);
}