//====================================================== file = udpPong.c =====
//=  A UDP ping server that listens on for "PING" and returns "PONG"          =
//=============================================================================
//=  Notes:                                                                   =
//=    1) This program conditionally compiles for Winsock and BSD sockets.    =
//=       Set the initial #define to WIN or BSD as appropriate.               =
//=    2) This program listens on port PORT_NUM for a "PING" message and then =
//=       returns a "PONG" message                                            =
//=    3) Ignore build warning for unreachable code                           =
//=---------------------------------------------------------------------------=
//=  Example execution: (udpPing and udpPong running on host 127.0.0.1)       =
//=    Waiting for PING on port 1024...                                       =
//=      Received PING from address = 127.0.0.1 and port = 55476              =
//=---------------------------------------------------------------------------=
//=  Build:                                                                   =
//=    Windows (WIN):  Borland: bcc32 udpPong.c                               =
//=                    MinGW: gcc udpPong.c -lws2_32 -o updPong               =
//=                    Visual C: cl ucpPong.c wsock32.lib                     =
//=    Unix/Mac (BSD): gcc ucpPong.c -lnsl -o ucpPong                         =
//=---------------------------------------------------------------------------=
//=  Execute: udpPong                                                         =
//=---------------------------------------------------------------------------=
//=  Author: << YOUR NAME >>                                                  =
//=          University of South Florida                                      =
//=          Email: << YOUR EMAIL ADDRESS >>                                  =
//=---------------------------------------------------------------------------=
//=  History:  << YOUR INITIALS >> (09/__/18) - Genesis (from udpServer.c)    =
//=============================================================================