fix the wrapped timestamp problem
fix the wrapped timestamp problem

u20024804/tcpcopy,liviusATnetskope/second,eliteYang/tcpcopy,wfxiang08/tcpcopy,u20024804/tcpcopy,daodaoliang/tcpcopy,caosiyang/tcpcopy,wfxiang08/tcpcopy,eliteYang/tcpcopy,ycaihua/tcpcopy,liviusATnetskope/second,left2right/tcpcopy,ycaihua/tcpcopy,left2right/tcpcopy,horryq/tcpcopy,caosiyang/tcpcopy,horryq/tcpcopy,daodaoliang/tcpcopy,sshling/tcpcopy,sshling/tcpcopy