blocking-accept.pkt

// Borrowed from https://github.com/google/packetdrill
// Test for blocking accept
--tolerance_usecs=100000

// Create a listening TCP 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

// Initiate a blocking system call
0.000...0.200 accept(3, ..., ...) = 4

0.100 < S 0:0(0) win 65535 <mss 1460,sackOK,nop,nop,nop,wscale 7>
0.100 > S. 0:0(0) ack 1 <...>
0.200 < . 1:1(0) ack 1 win 65535
// The connection gets accepted at this point

0.300 write(4, ..., 1460) = 1460
0.300 > P. 1:1461(1460) ack 1 <...>