Computer Networks and Distributed Systems:

Keyword: TCP Socket, Client - Server

TCP (Transmission Control Protocol) is a standard that defines how to establish and maintain a network conversation via which application programs can exchange data. TCP works with the Internet Protocol (IP), which defines how computers send packets of data to each other. Together, TCP and IP are the basic rules defining the Internet.

A TCP socket is an endpoint instance defined by an IP address and a port in the context of either a particular TCP connection or the listening state.

A TCP socket is not a connection, it is the endpoint of a specific connection.

Programs need to perform a reasonable amount of error checking, be well documented, and include a set of user instructions. Upon an error, issue an appropriate error message and then continue.

Please feel free to choose any programming language, on any operating system. ( just me tell what you are using)

Please copy/paste the screen catch pictures of your program, and attach source code to your assignment.

Here are some source code in C: (use if needed)

Example Piece of Code: Client /* translate host name into peers IP address */ hp = gethostbyname(host); if (!hp) { fprintf(stderr, "simplex-talk: unknown host: %s ", host); exit(1); } /* build address data structure */ bzero((char *)&sin, sizeof(sin)); sin.sin_family = AF_INET; bcopy(hp->h_addr, (char *)&sin.sin_addr, hp->h_length); sin.sin_port = htons(SERVER_PORT); /* active open */ if ((s = socket(PF_INET, SOCK_STREAM, 0))

Example Piece of Code: Server struct sockaddr_in sin; char buf[MAX_LINE]; int len; int s, new_s; /* build address data structure */ bzero((char *)&sin, sizeof(sin)); sin.sin_family = AF_INET; sin.sin_addr.s_addr = INADDR_ANY; sin.sin_port = htons(SERVER_PORT); /* setup passive open */ if ((s = socket(PF_INET, SOCK_STREAM, 0)) CS 576 Computer Networks and Distributed Systems Programming Assign 1 Keyword: TCP Socket, Client - Server For this assignment you are to implement both a TCP server and a TCP client piece of You may use any high level language that provides built in networking support The server is to accept a connection from a client and receive a text message of no more than 256 characters. It will convert the message to an encoded message as detailed next. Your server will convert each character by replacing it with the next character in the ASCII sequence. For example the message: "Hello World" would become "Ifmmp!Xpsme" You must also write a client that will connect to the server using the same port and then pass a message to the server. The server will respond with the message converted to the encoded string. The client will then display the converted message to the monitor. CS 576 Computer Networks and Distributed Systems Programming Assign 1 Keyword: TCP Socket, Client - Server For this assignment you are to implement both a TCP server and a TCP client piece of You may use any high level language that provides built in networking support The server is to accept a connection from a client and receive a text message of no more than 256 characters. It will convert the message to an encoded message as detailed next. Your server will convert each character by replacing it with the next character in the ASCII sequence. For example the message: "Hello World" would become "Ifmmp!Xpsme" You must also write a client that will connect to the server using the same port and then pass a message to the server. The server will respond with the message converted to the encoded string. The client will then display the converted message to the monitor