while((opt = getopt(argc,argv, ":p")) != -1){

        switch(opt){

                case 'p': port = optarg;
                        break;

                default: break;
        }
    }

    if(optind < argc){
        servername = argv[optind];
        printf("Servername: %s", servername);
        printf("port: %s", port);
    }