Network programming, which entails creating network applications, frequently uses the C programming language. Client-server, peer-to-peer, and web apps are examples of network applications. We will go through how to use C programming for network programming in this tutorial.
Establishing a connection between the client and the server is the first stage in network programming. The server acknowledges the client’s connection request after receiving it. When the client receives the server’s acknowledgement, the connection is established. The socket API is used in C programming to create connections between the client and server.
The socket API offers operations for generating sockets, connecting sockets, and binding sockets to certain addresses. The socket() function, which accepts the address family, socket type, and protocol as parameters, can be used to construct sockets. For IPv4 or IPv6, the address family can be either AF INET or AF INET6. For a TCP socket, the socket type can be SOCK STREAM, and for a UDP socket, it can be SOCK DGRAM. For the default protocol, the protocol can be set to 0.
The bind() function can be used to bind the socket to a particular address once it has been created. The socket file descriptor, the address structure, and the size of the address structure are all parameters for the bind() function. The IP address and socket port number are both contained in the address structure.
With the listen() function, the server can watch for incoming connections after binding the socket to a certain address. The socket file descriptor and the maximum number of open connections are parameters for the listen() function.
With the connect() function, the client can establish a connection to the server. The socket file descriptor, the address structure, and the size of the address structure are all inputs for the connect() function.
The send() and recv() functions can be used to send and receive data between the client and server once the connection has been made. Data is sent from the client to the server using the send() method and received from the server using the recv() function.
In conclusion, network programming, which entails creating network applications, is frequently done in C. For the purpose of connecting the client and server, the socket API is utilised. The socket() method can be used to construct sockets, and the send() and recv() functions can be used to send and receive data between the client and server. C programming may be a potent tool for network programming if used properly and with the necessary skills.