socket_server.c

// Server side C/C++ program to demonstrate Socket
// programming

#include "common.h"

#define PORT 8080
int main()
{
	int server_fd, new_socket, valread;
	struct sockaddr_in address;
	int opt = 1;
	int addrlen = sizeof(address);
	char buffer[1024] = { 0 };
	char* hello = "Hello from server";

	// Creating socket file descriptor
	if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
		perror("socket failed");
		exit(EXIT_FAILURE);
	}

	// Forcefully attaching socket to the port 8080
	if (setsockopt(server_fd, SOL_SOCKET,
				SO_REUSEADDR | SO_REUSEPORT, &opt,
				sizeof(opt))) {
		perror("setsockopt");
		exit(EXIT_FAILURE);
	}
	address.sin_family = AF_INET;
	address.sin_addr.s_addr = INADDR_ANY;
	address.sin_port = htons(PORT);

	// Forcefully attaching socket to the port 8080
	if (bind(server_fd, (struct sockaddr*)&address,
			sizeof(address))
		< 0) {
		perror("bind failed");
		exit(EXIT_FAILURE);
	}
	if (listen(server_fd, 3) < 0) {
		perror("listen");
		exit(EXIT_FAILURE);
	}
	if ((new_socket
		= accept(server_fd, (struct sockaddr*)&address,
				(socklen_t*)&addrlen))
		< 0) {
		perror("accept");
		exit(EXIT_FAILURE);
	}
  PRINT_INT("Accept fd", new_socket);
	valread = read(new_socket, buffer, 1024);
	PRINT_STR("Buffer from CLIENT", buffer);
	send(new_socket, hello, strlen(hello), 0);
	print("Hello message sent\n");

	// closing the connected socket
	close(new_socket);
	// closing the listening socket
	shutdown(server_fd, SHUT_RDWR);
	return 0;
}