1*1fd03622SKuniyuki Iwashima// SPDX-License-Identifier: GPL-2.0 2*1fd03622SKuniyuki Iwashima`./defaults.sh 3*1fd03622SKuniyuki Iwashima ./set_sysctls.py /proc/sys/net/ipv4/tcp_fastopen=0x602 /proc/sys/net/ipv4/tcp_timestamps=0` 4*1fd03622SKuniyuki Iwashima 5*1fd03622SKuniyuki Iwashima 0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_TCP) = 3 6*1fd03622SKuniyuki Iwashima +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 7*1fd03622SKuniyuki Iwashima +0 bind(3, ..., ...) = 0 8*1fd03622SKuniyuki Iwashima +0 listen(3, 1) = 0 9*1fd03622SKuniyuki Iwashima 10*1fd03622SKuniyuki Iwashima +0 < S 0:10(10) win 32792 <mss 1460,nop,nop,sackOK> 11*1fd03622SKuniyuki Iwashima +0 > S. 0:0(0) ack 11 win 65535 <mss 1460,nop,nop,sackOK> 12*1fd03622SKuniyuki Iwashima 13*1fd03622SKuniyuki Iwashima// sk->sk_state is TCP_SYN_RECV 14*1fd03622SKuniyuki Iwashima +.1 accept(3, ..., ...) = 4 15*1fd03622SKuniyuki Iwashima 16*1fd03622SKuniyuki Iwashima// tcp_disconnect() sets sk->sk_state to TCP_CLOSE 17*1fd03622SKuniyuki Iwashima +0 connect(4, AF_UNSPEC, ...) = 0 18*1fd03622SKuniyuki Iwashima +0 > R. 1:1(0) ack 11 win 65535 19*1fd03622SKuniyuki Iwashima 20*1fd03622SKuniyuki Iwashima// connect() sets sk->sk_state to TCP_SYN_SENT 21*1fd03622SKuniyuki Iwashima +0 fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0 22*1fd03622SKuniyuki Iwashima +0 connect(4, ..., ...) = -1 EINPROGRESS (Operation is now in progress) 23*1fd03622SKuniyuki Iwashima +0 > S 0:0(0) win 65535 <mss 1460,nop,nop,sackOK,nop,wscale 8> 24*1fd03622SKuniyuki Iwashima 25*1fd03622SKuniyuki Iwashima// tp->fastopen_rsk must be NULL 26*1fd03622SKuniyuki Iwashima +1 > S 0:0(0) win 65535 <mss 1460,nop,nop,sackOK,nop,wscale 8> 27