   Libpcap, this excellent library is designed by the Computer Systems
Engineering Group at Lawrence Berkeley Laboratory.  Some portion
of this program has used this lib. There is a bug in libpcap, which 
will decelerate the program when there are few packets passing
in network. Many thanks to Fyodor, in his virtuoso nmap, has provided
the fixed versio.
   Ttywatcher. Some portion ( I must say much) of this program has
developed from this software. Since I didn't spend much time on this
program, and I have almost none of the initial knowledge of xview
programming, ttywatcher give me much of the thought and a excellent
structure. Thanks for the author Mike Neuman in En Garde Systems,Inc.
   Tcpdump and sniffit also give much help when I have some doubt in
TCP/IP protocol.
   Perhaps the most support com from my adviser Li Xing, who give me
the initial thought and leisure time to finish it.

