socket_programing_C.c

#include <unistd.h>
#include <stdio.h>
#include <sys/socket.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <string.h>

int main(){
	int sockfd, newSockfd;
	struct sockaddr_in serv_addr, cli_addr;
	int port_number = 8888;

	//create socket
	sockfd = socket(AF_INET, SOCK_STREAM, 0);
	if (sockfd < 0)
	{
		printf("socket failed\n");
		return 1;
	}
	printf("socket created successfully\n");
	

	//Prepare the sockaddr_in structur
	serv_addr.sin_family = AF_INET;
	serv_addr.sin_addr.s_addr = INADDR_ANY;
	serv_addr.sin_port = htons(port_number);

	//Bind
	if(bind(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
	{
		printf("bind failed\n");
		return 1;
	}

	//Listen
	listen(sockfd , 3);



	//Accept the connectin
	int c = sizeof(struct sockaddr_in);
	newSockfd = accept(sockfd, (struct sockaddr *)&cli_addr, (socklen_t *)&c);
	if(newSockfd < 0)
	{
		printf("Connection Failed\n");
		return 1;
	}
	printf("Connection accepted");
	char *msg = "Hello Client , I have received your connection\n";
	
	//send some message to client
	write(newSockfd, msg, strlen(msg));
	

	//close socket
	close(newSockfd);
	close(sockfd);
	

	return 0;
}