int main(void)
{
	int sockfd, new_fd;  // listen on sock_fd, new connection on new_fd
	struct sockaddr_in my_addr;	// my address information
	struct sockaddr_in their_addr; // connector's address information
	socklen_t sin_size;
	struct sigaction sa;
	int yes=1;

	if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
		perror("socket");
		exit(1);
	}
(..)
my_addr.sin_family = AF_INET;		 // host byte order
	my_addr.sin_port = htons(MYPORT);	 // short, network byte order
	my_addr.sin_addr.s_addr = INADDR_ANY; // automatically fill with my IP
	memset(my_addr.sin_zero, '\0', sizeof my_addr.sin_zero);

	if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof my_addr) == -1) {
		perror("bind");
		exit(1);
	}

(...)
}