main.cpp

#include <unistd.h>
#include <iostream>
#include <errno.h>
#include <sys/socket.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
#include <sys/wait.h>
#include <cstring>

int main(int argc, char* argv[]){
	int sockfd, new_fd;
	struct sockaddr_in my_sockaddr, their_sockaddr;
	unsigned int sin_size;
	char command[1024];

	memset(&my_sockaddr, 0, sizeof(my_sockaddr));
	my_sockaddr.sin_family = AF_INET;
	my_sockaddr.sin_addr.s_addr = INADDR_ANY;
	my_sockaddr.sin_port = htons(2142);

	sockfd = socket(AF_INET, SOCK_STREAM, 0);
	if (sockfd < 0) {
		perror("socket");
		exit(1);
	}

	if(bind(sockfd, (struct sockaddr*) &my_sockaddr, sizeof(struct sockaddr)) < 0){
		perror("bind");
		exit(1);
	}

	if(listen(sockfd, 5) == -1){
		perror("bind");
		exit(1);
	}

	sin_size = sizeof(struct sockaddr_in);
	while(true){
		new_fd = accept(sockfd, (struct sockaddr*)&their_sockaddr, &sin_size);
		std::cout << "The server has received : " << inet_ntoa(their_sockaddr.sin_addr) << std::endl;

		recv(new_fd, &command, 1024, 0);
		std::cout << inet_ntoa(their_sockaddr.sin_addr) << ": " << command  << ": hey"<< std::endl;

		if(command == "ping"){
			send(new_fd, "pong!", 5, 0);
		}

		close(new_fd);

		/* if(!fork()){ */
		/* if(send(new_fd, "Hello, world!\n", 14,0) == -1){ */
		/* 	perror("send"); */
		/* 	close(new_fd); */
		/* 	exit(0); */
		/* } */
		/* close(new_fd); */
		/* while(waitpid(-1, NULL, WNOHANG) > 0); */
		/* } */
	}
}