// Establish a connection.
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
+0  < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7>
+0  > S. 0:0(0) ack 1 win 29200 <mss 1460,nop,nop,sackOK,nop,wscale 10>
+.0227 < . 1:1(0) ack 1 win 20000
+0  accept(3, ..., ...) = 4
+0  write(4, ..., 11000) = 11000
+0  > . 1:2001(2000) ack 1 win 29
+0  > . 2001:4001(2000) ack 1 win 29
+0  > . 4001:6001(2000) ack 1 win 29
+0  > . 6001:8001(2000) ack 1 win 29
+0  > . 8001:10001(2000) ack 1 win 29
0.071769 > P. 10001:11001(1000) ack 1 win 29
+0 `echo "+++++++++++++++++++++++++++++++++++++++++"`
+0.024  < . 1:1(0) ack 1 win 257  <sack 10001:11001,nop, nop>
+0  > . 1:1001(1000) ack 1 win 29
+0.024  < . 1:1(0) ack 1001 win 257  <sack 1:1001 10001:11001,nop,nop>
0.351771  > . 1001:2001(1000) ack 1 win 29
+0.024  < . 1:1(0) ack 2001 win 257  <sack 1001:2001 10001:11001,nop,nop>
0.827782  > . 2001:3001(1000) ack 1 win 29