// Simple TCP connection without any data transfer
// Arnaud Schils and Olivier Bonaventure, 2014

0   socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
+0  setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
+0  bind(3, ..., ...) = 0
+0  listen(3, 1) = 0

//TCP three-way handshake
+0  < S 0:0(0) win 4000 <mss 1000>
+0  > S. 0:0(0) ack 1 <...>
+.1 < . 1:1(0) ack 1 win 4000
+0  accept(3, ..., ...) = 4

// write ten bytes
+0 write(4, ..., 10)=10
+0 > P. 1:11(10) ack 1
+.1 < . 1:1(0) ack 11 win 4000

// read two bytes
+.1 < P. 1:3(2) ack 11 win 4000
+0 > . 11:11(0) ack 3
+.2 read(4,...,1000)=2

//Packetdrill closes connection gracefully
+0 < F. 3:3(0) ack 11 win 4000
+0 > . 11:11(0) ack 4
//Kernel closes connection gracefully
+0 close(4) = 0
+0 > F. 11:11(0) ack 4
+0 < . 4:4(0) ack 12 win 4000