title: is it possible to get the TCP sequence number of SYN/ACK packet in TCP 3-way handshaking?
body: <p>I have a tcp client program
  when it initiates a 3-way handshaking with a remote tcp server by sending a SYN
  it will receive a SYN/ACK from the server,</p>
  
  <p>is it possible to read the sequence number and acknowledgement sequence number of the SYN/ACK packet?
  if so ,how to do it?
  BTW, I'm working on linux c
  thanks!</p>