[root@localhost tcping]# ./tcping www.baidu.com
TCPING www.baidu.com:80
response from www.baidu.com:80, seq=0 time=8.50 ms
response from www.baidu.com:80, seq=1 time=7.53 ms
response from www.baidu.com:80, seq=2 time=16.33 ms
response from www.baidu.com:80, seq=3 time=7.15 ms
response from www.baidu.com:80, seq=4 time=8.31 ms
response from www.baidu.com:80, seq=5 time=12.98 ms
response from www.baidu.com:80, seq=6 time=11.50 ms
response from www.baidu.com:80, seq=7 time=9.87 ms
response from www.baidu.com:80, seq=8 time=17.79 ms
response from www.baidu.com:80, seq=9 time=7.72 ms
^C
receive signal:[2]
--- www.baidu.com:80 tcping statistics ---
10 responses, 10 ok, 0.00% failed
round-trip min/avg/max = 7.2/10.8/17.8 ms

[root@vagrant-172-28-32-220 src]# tcpdump -D
1.enp0s3
2.enp0s8
3.docker0
4.nflog (Linux netfilter log (NFLOG) interface)
5.nfqueue (Linux netfilter queue (NFQUEUE) interface)
6.veth7c436aa
7.veth23db264
8.vethcbb54c1
9.any (Pseudo-device that captures on all interfaces)
10.lo [Loopback]