GSSAPI 服务器示例：main() 函数

gss-server main() 函数可执行以下任务：

• 解析命令行参数并为变量指定参数

• 获取与机制对应的服务的凭证

• 调用 sign_server() 函数，该函数会执行涉及到对消息进行签名和返回消息等工作

• 释放已经获取的凭证

• 释放机制的 OID 名称空间

• 在连接仍处于打开状态时关闭连接

此示例的源代码也可以通过 Sun 下载中心获取。请访问 http://www.sun.com/download/products.xml?id=41912db5

示例 6–1 gss-server 示例：main()

int

main(argc, argv)

     int argc;

     char **argv;

{

     char *service_name;

     gss_cred_id_t server_creds;

     OM_uint32 min_stat;

     u_short port = 4444;

     int s;

     int once = 0;

     int do_inetd = 0;



     log = stdout;

     display_file = stdout;



     /* Parse command-line arguments. */

     argc--; argv++;

     while (argc) {

	  if (strcmp(*argv, "-port") == 0) {

	       argc--; argv++;

	       if (!argc) usage();

	       port = atoi(*argv);

	  } else if (strcmp(*argv, "-verbose") == 0) {

	      verbose = 1;

	  } else if (strcmp(*argv, "-once") == 0) {

	      once = 1;

	  } else if (strcmp(*argv, "-inetd") == 0) {

	      do_inetd = 1;

	  } else if (strcmp(*argv, "-logfile") == 0) {

	      argc--; argv++;

	      if (!argc) usage();

	      log = fopen(*argv, "a");

	      display_file = log;

	      if (!log) {

		  perror(*argv);

		  exit(1);

	      }

	  } else

	       break;

	  argc--; argv++;

     }

     if (argc != 1)

	  usage();



     if ((*argv)[0] == '-')

	  usage();



     service_name = *argv;



     /* Acquire service credentials. */

     if (server_acquire_creds(service_name, &server_creds) < 0)

	 return -1;

     

     if (do_inetd) {

	 close(1);

	 close(2);



 /* Sign and return message. */

	 sign_server(0, server_creds);

	 close(0);

     } else {

	 int stmp;



	 if ((stmp = create_socket(port)) >= 0) {

	     do {

		 /* Accept a TCP connection */

		 if ((s = accept(stmp, NULL, 0)) < 0) {

		     perror("accepting connection");

		     continue;

		 }

		 /* this return value is not checked, because there's

		    not really anything to do if it fails */

		 sign_server(s, server_creds);

		 close(s);

	     } while (!once);



	     close(stmp);

	 }

     }



     /* Close down and clean up. */

     (void) gss_release_cred(&min_stat, &server_creds);



     /*NOTREACHED*/

     (void) close(s);

     return 0;

}