The interface on the destination (the server) receives the incoming SYN packet, places it on the ipintrq queue, and raises a software interrupt.
目的地(服务器)上的接口接收传入syn包，将其放在ipintrq队列中，并引发软件中断。
2
FAILIFQUIESCE - enables the queue manager to interrupt any API call in order to shut down.
FAILIFQUIESCE——使队列管理器能够中断任何API调用，以便关闭。
3
tcp_input() executes at the s/w interrupt, and picks up the SYN packet from ipintrq, processes it, and places the partially completed socket connection in an incomplete socket queue.
tcp_input() 在 s/w 中断时执行，并从 ipintrq 拾取 SYN 包，对其进行处理，并将部分完成的套接字连接放入完成的套接字队列。