/*

 * Status monitor protocol specification

 * Copyright (c) 2010, Oracle America, Inc.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are

 * met:

 *

 *     * Redistributions of source code must retain the above copyright

 *       notice, this list of conditions and the following disclaimer.

 *     * Redistributions in binary form must reproduce the above

 *       copyright notice, this list of conditions and the following

 *       disclaimer in the documentation and/or other materials

 *       provided with the distribution.

 *     * Neither the name of the "Oracle America, Inc." nor the names of its

 *       contributors may be used to endorse or promote products derived

 *       from this software without specific prior written permission.

 *

 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

 *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

 *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,

 *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE

 *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

 *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

 *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

program SM_PROG {

	version SM_VERS  {

		/* res_stat = stat_succ if status monitor agrees to monitor */

		/* res_stat = stat_fail if status monitor cannot monitor */

		/* if res_stat == stat_succ, state = state number of site sm_name */

		struct sm_stat_res			 SM_STAT(struct sm_name) = 1;

		/* res_stat = stat_succ if status monitor agrees to monitor */

		/* res_stat = stat_fail if status monitor cannot monitor */

		/* stat consists of state number of local site */

		struct sm_stat_res			 SM_MON(struct mon) = 2;

		/* stat consists of state number of local site */

		struct sm_stat				 SM_UNMON(struct mon_id) = 3;

		/* stat consists of state number of local site */

		struct sm_stat				 SM_UNMON_ALL(struct my_id) = 4;

		void					 SM_SIMU_CRASH(void) = 5;

	} = 1;

} = 100024;

const	SM_MAXSTRLEN = 1024;

struct sm_name {

	string mon_name<SM_MAXSTRLEN>;

};

struct my_id {

	string	 my_name<SM_MAXSTRLEN>;		/* name of the site initiating the monitoring request*/

	int	my_prog;			/* rpc program # of the requesting process */

	int	my_vers;			/* rpc version # of the requesting process */

	int	my_proc;			/* rpc procedure # of the requesting process */

};

struct mon_id {

	string	mon_name<SM_MAXSTRLEN>;		/* name of the site to be monitored */

	struct my_id my_id;

};

struct mon{

	struct mon_id mon_id;

	opaque priv[16]; 		/* private information to store at monitor for requesting process */

};

/*

 * state # of status monitor monotonically increases each time

 * status of the site changes:

 * an even number (>= 0) indicates the site is down and

 * an odd number (> 0) indicates the site is up;

 */

struct sm_stat {

	int state;		/* state # of status monitor */

};

enum res {

	stat_succ = 0,		/* status monitor agrees to monitor */

	stat_fail = 1		/* status monitor cannot monitor */

};

struct sm_stat_res {

	res res_stat;

	int state;

};

/*

 * structure of the status message sent back by the status monitor

 * when monitor site status changes

 */

struct status {

	string mon_name<SM_MAXSTRLEN>;

	int state;

	opaque priv[16];		/* stored private information */

};