In this peer$-$to$-$peer application, the program enters a loop that:

a$.$ Calls kbhit$()$ to see if a key has been hit on the local keyboard of the RPi.

b$.$ If a key has been hit, use fgets$()$ to read in a string from file $$stdin$.$

c$.$ After fgets$()$ returns, take the string from fgets and send the string

to the remote port using sendUdpData$()$ following the requirements

in the Sending UDP Messages Section

d$.$ If $$QUIT$$ was returned at the start of the string returned by fgets$(),$

exit the loop and close the listener port following the requirements

in the Shutdown Section

e$.$ Attempt to receive a message from the remote port using

receiveUdpData$()$ following the requirements

in the Receiving UDP Messages Section

f$.$ If data has been received, print the data in the right column

g$.$ If $$QUIT$$ was received, exit the loop and close the listener port following

the requirements in the Shutdown Section

h$.$ Repeat a$-$g until the program exits