tcp_server_improved.c

#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/ip.h>
#include <arpa/inet.h>


int main(){
	int sockfd, newsockfd;
	struct sockaddr_in my_addr, client_addr;
	char buffer[100];

	//Step 1: Create a socket
	sockfd = socket(AF_INET, SOCK_STREAM, 0);
	
	//Step 2: Bind to a port number 
	memset(&my_addr, 0, sizeof(struct sockaddr_in));
	my_addr.sin_family = AF_INET;
	my_addr.sin_port = htons(9090);
	bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr_in));

	//Step 3: Listen for conections
	//the goal of task 1 is to flood this listen with a bunch of SYN requests unitl it cannot take any more
	listen(sockfd, 5);
	
	socklen_t client_len = sizeof(client_addr);
	while(1){
		newsockfd = accept(sockfd, (struct sockaddr *)&client_addr, &client_len);

	if (fork() == 0) { //Child process. Remember 3100?
		close(sockfd);
		
		//Read Data
		memset(buffer, 0, sizeof(buffer));
		int len = read(newsockfd, buffer, 100);
		printf("Recieved %d bytes.\n%s\n", len, buffer);
		
		close(newsockfd);
		return 0;
	} else { //Parent process
		close(newsockfd);
		}//ENDELSE
	}//ENDWHILE
}//ENDMAIN