solve dead loop for offline
solve dead loop for offline

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