TIME_WAIT

原文： http://www.serverframework.com/asynchronousevents/2011/01/time-wait-and-its-design-implications-for-protocols-and-scalable-servers.html

reference： http://stackoverflow.com/questions/3757289/tcp-option-so-linger-zero-when-its-required

http://stackoverflow.com/questions/20467005/is-epollerr-without-epollhup-ok  

http://stackoverflow.com/questions/16320039/getting-disconnection-notification-using-tcp-keep-alive-on-write-blocked-socket?rq=1

http://stackoverflow.com/questions/6437879/how-do-i-use-epollhup

http://tldp.org/HOWTO/html_single/TCP-Keepalive-HOWTO/

http://stackoverflow.com/questions/7735618/tcp-rst-packet-details

http://developerweb.net/viewtopic.php?id=2941

http://en.wikipedia.org/wiki/Transmission_Control_Protocol

http://en.wikipedia.org/wiki/TCP_reset_attack