void runtime_call(){
	char a;
	printf("runtime_call is running\n");
	recv(sockad,&a,1,0);
	for(;a!='q';){
		if(a=='1'){
			//sync
			sync_server();
		}
		else if(a=='2'){
			//trans
			trans_server();
		}
		else if(a=='3'){
			//http
		}
		recv(sockad,&a,1,0);
	}
}