// A simple test for the TCP SIOCINQ ioctl.

// Create a socket.
0.000 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
0.000 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0

0.000 bind(3, ..., ...) = 0
0.000 listen(3, 1) = 0

// Establish a connection.
0.100 < S 0:0(0) win 20000 <mss 1000,sackOK,nop,nop>
0.100 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK>
0.200 < . 1:1(0) ack 1 win 20000
0.200 accept(3, ..., ...) = 4

// Receive a segment.
0.200 < P. 1:1001(1000) ack 1 win 257
0.200 > . 1:1(0) ack 1001

0.210 ioctl(4, SIOCINQ, [1000]) = 0
0.220 read(4, ..., 1000) = 1000
0.230 ioctl(4, SIOCINQ, [0]) = 0

// Receive a segment with a FIN.
0.300 < FP. 1001:2001(1000) ack 1 win 257
0.300 > . 1:1(0) ack 2002

0.310 ioctl(4, SIOCINQ, [1000]) = 0
0.320 read(4, ..., 1000) = 1000
0.330 ioctl(4, SIOCINQ, [0]) = 0