http://www.cnblogs.com/rain24/archive/2011/11/18/2253571.html
http://www.cnblogs.com/rain24/archive/2011/11/18/2254455.html
http://www.cnblogs.com/xiaotlili/archive/2011/08/01/2123926.html
linux下socket编程
http://blog.csdn.net/aobai219/article/details/1596964
select函数
http://blog.csdn.net/zi_jin/article/details/4214359