void init_con(){
	sockfd = socket(AF_INET,SOCK_STREAM,0);
	memset(&seraddr,0,sizeof(struct sockaddr_in));
	seraddr.sin_family = AF_INET;
	seraddr.sin_port = htons(8000);
	seraddr.sin_addr.s_addr = inet_addr("127.0.0.1");
	bind(sockfd,(struct sockaddr *)&seraddr,sizeof(struct sockaddr));
	listen(sockfd, 5);
	printf("start listen\n");
	sockad=accept(sockfd, (struct sockaddr *)&cliaddr, &sin_size);
	printf("connection started\n");

}