InTrace 是一个类似 traceroute 的应用，用户可以针对已建立的 TCP 连接跟踪其 IP 的跳跃。
使用方法：
# ./intrace --h www.oschina.net InTrace 1.4.3 -- R: 192.88.156.10/0 (0) L: 0.0.0.0/0 Payload Size: 1 bytes, Seq: 0x00000000, Ack: 0x00000000 Status: Sniffing for connection packets
返回内容：
# [src addr] [icmp src addr] [pkt type] 1. [194.55.39.1 ] [192.88.156.10 ] [ICMP_TIMXCEED] 2. [194.29.3.254 ] [192.88.156.10 ] [ICMP_TIMXCEED] 3. [62.179.116.149 ] [192.88.156.10 ] [ICMP_TIMXCEED] 4. [213.46.171.42 ] [192.88.156.10 ] [ICMP_TIMXCEED] 5. [89.149.182.49 ] [192.88.156.10 ] [ICMP_TIMXCEED] 6. [77.67.94.74 ] [192.88.156.10 ] [ICMP_TIMXCEED] 7. [69.25.168.65 ] [192.88.156.10 ] [ICMP_TIMXCEED] 8. [69.25.127.90 ] [192.88.156.10 ] [ICMP_TIMXCEED] 9. [192.88.158.250 ] [192.88.156.10 ] [ICMP_TIMXCEED] 10. [192.88.156.10 ] [192.88.156.10 ] [ICMP_TIMXCEED NAT] 11. [192.88.156.10 ] [ *** ] [TCP]
