实现一个扫描器，必须能够完成以下所有功能：使用TCP connect、TCP SYN和TCP FIN进行端口扫描，使用ICMP echo扫描实现IP扫描。并把扫描得到的结果记录下来-To achieve a scanner, you must be able to complete all of the following features: the use of TCP connect, TCP SYN and TCP FIN to conduct port scanning, the use