YOUR CLIENT$/$SERVER PAIRYou are to write two programs:$1.$ A client program that will connect with your serverand ask for the public key of a given user$\mathrm{.}2.$ A server program that will read a list of pairs $($userID$,$ public key$)$ from a file, wait for connectionrequests from client processes, and send them backeither a string containing the requested public key ora code notifying them that the user is not in thedatabase.THE SERVER PROGRAMYour server should start by prompting the user for a filename:Enter a file name: keys$2.$txtThis file will contain pairs of user IDs and public keys asin:jorge@uh$.$edu a$1$b$234$c$4567$df$123$abceva@rice.edu $5672$c$4567$df$123$abc$54$Both entries will never contain any white spaces. Itwill then store the contents of the file into a table. Yourserver should then prompt for a port number as in:Enter the server port number: $2468$It will then:$1.$ Create a datagram socket in the Internet domain,$2.$ Do a bind$()$to bind the socket to the specified portnumber.COSC $3360$Operating System FundamentalsAssignment #$1$: A public key serverDue on Wednesday, November $6$ at $11$:$59$:$59$ PM$3.$ Enter an infinite loop where it will repeatedly do arecvfrom$()$ to receive user IDs from its clients then asendto$()$ to reply with the corresponding public keys.For debugging and grading purposes, your servershould print out the user ID it receives and its status as:jorge@uh$.$edu: Found a public keyrick@tamu.edu: Not in the databaseYour server will keep accepting client requests untilit receives a Done message from one of its clients. In thatcase, it should terminate after printing:Terminated by user request.THE CLIENT PROGRAMYour client should start by prompting the user for aserver hostname and a server port number as:Enter the server hostname: localhostEnter the server port number: $2468$It will then prompt for a user ID as:Enter a user ID: jorge@uh$.$eduIt should then create a datagram socket, do asendto$()$ to send the user ID to the server then arecvfrom$()$ to get its reply. Once this reply has arrived,the client should display the outcome of the query as:The public key for jorge@uh$.$edu is a$1$b$234$The user rick@tamu.edu is not in the database.Unlike the server, each client will only handle a singlerequest