socket
......\tcp
......\...\client
......\...\client.c
......\...\server
......\...\server.c
......\...\server.c.bak
......\udp
......\...\makefile
......\...\udprecv
......\...\udprecv.c
......\...\udprecv.c.bak
......\...\udpsend
......\...\udpsend.c