Using Internet TCP sockets, write a C program, ftpclient.c$,$ which mimics the standard ftp command as shown below:

$ $./$ftpclient server

Here, a client is making connection to an FTP server.

Once the connection is established between the client and the server, the client program should then display a user prompt:

ftp$>$ command

so that the user may issue various commands. The following FTP commands must be implemented for the client and sent over the control connection between the client and the server:

get filename

mget filenames

put filename

mput filenames

ls

cd

lcd

bye

Write another C program, ftpserver.c$,$ which runs on the server, carrying out the client$$s requests. The server may use any ports between $6000$ and $6999$ for its control and data connections. Run your server with:

$ $./$ftpserver

Caution: The data conection between the clent andhe server must be done passively $($passive data connection$).$

When the server receives a command for a file transfer over the control connection $($either to$,$ or from, the remote host$),$ the server initiates a TCP data connection to the client side. The server sends exactly one file over the data connection and then closes the data connection. If$,$ during the same session, the user wants to transfer another file, the server opens another data connection. Thus, with FTP$,$ the control connection remains open throughout the duration of the user session, but a new data connection is created for each file transferred within a session.