The Transport Layer Socket Programming CE 306

Application to TCP Interface process sends/receives messages to/from its socket

Berkley Socket Primitives for TCP

TCP Socket: Overall Structure

UDP Socket: Overall Structure

Bridge Between App and TCP

Binding to Server

Server Waiting for Clients

Server Accepting Client Requests

TCP Data Exchange

Send() and Receive() Variants

UDP: Data Exchange

Terminate the Connection

Resolving Server and Client Addresses

Gethostbyname(): Sample Call

Example: UDP Client

TCP: Simple ECHO Client #include <stdio.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h>

TCP: Simple ECHO Server #include <stdio.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h>

Example Code