通过程序实现类似windows系统类似tracert的功能，可以通过wireshark抓取tracert数据分析

来了解工作原理。基本流程向目标主机发送3个ICMP回显报文，IP报文的ttl值设为1，接收ICMP

差错报告报文，记录从发送出去到接收花费的时间，然后修改ttl值为2，再发3个ICMP报文，

记录接收到的差错报告报文，直到接收到ICMP回显中的应答报文接收，打印数据类似如下

格式：-Program similar to windows system similar to the function of tracert tracert can crawl through wireshark data analysis to understand the working principle. Basic flow 3 ICMP echo packet is sent to the target host the IP packets ttl value is set to 1, receiving ICMP error report message sent records from the time it takes to the receiver, and then modify the ttl value of 2, recurrence 3 ICMP packets, error reporting records received packets until it receives the ICMP echo reply packets to receive print data similar to the following format: