参考了 ss的源代码
以及 netlink相关资料:http://blog.youkuaiyun.com/scdxmoe/article/details/27711205
实现结果为:
gcc netlink_dig_530_7.c -o netlink_dig_530_7
./netlink_dig_530_7
state family l.addr l.port r.addr r.rport LISTEN AF_INET localhost 53 0.0.0.0 0 LISTEN AF_INET (null) 21 0.0.0.0 0 LISTEN AF_INET (null) 22 0.0.0.0 0 LISTEN AF_INET (null) 22 0.0.0.0 0 LISTEN AF_INET localhost 631 0.0.0.0 0 LISTEN AF_INET (null) 12865 0.0.0.0 0 ESTAB AF_INET ubuntu.local 59208 91.189.89.134 80 ESTAB AF_INET ubuntu.local 22 192.168.0.248 9689 ESTAB AF_INET ubuntu.local 22 192.168.0.248 9295 ESTAB AF_INET ubuntu.local 35531 91.189.94.25 80 ESTAB AF_INET ubuntu.local 22 192.168.0.248 9691 |
本文的实验 并没有实现怎么样获取TCP的窗口值cwnd和RTT值,在ss源码中我看到了他利用了/proc