#ifndef SYSMOND_H
#define SYSMOND_H

/*************************************************************************/

/* Default port number for daemon. */

#define DEFAULT_PORT	497

/*************************************************************************/

/* Basic structure for a query and response.  These are not actually used
 * in the code, but are here for explanatory purposes.  Every query will
 * have exactly one response (which may be an error), with the exception of
 * Q_CLOSE, Q_REBOOT, and Q_RESTART.
 */

typedef struct {
    unsigned int magic;		/* QUERY_MAGIC */
    int len;			/* Of everything else, not including this */
    unsigned char query;	/* From the list below */
    char param[1];		/* Extended as long as needed */
} Query;

typedef struct {
    unsigned int magic;		/* RESPONSE_MAGIC */
    int len;			/* Of everything else */
    unsigned char query;	/* What we're responding to */
    char result[1];		/* As long as needed */
} Response;

#define QUERY_MAGIC		0xC0DEBEAD
#define RESPONSE_MAGIC		0xFEE1D1FF


/* Query types.  Parameters and results are listed for each query type.
 * Strings are shown as "description" and are sent null-terminated;
 * characters are shown as 'description'; integers are 4 bytes in network
 * order and are shown as <description>.  Success values are either 1
 * (success) or 0 (failure).
 */

#define Q_PASSWORD	0	/* Identify; must be first query sent    *
				 *     param: "password"                 *
				 *     result: <success>                 *
				 * If incorrect, connection is closed.   */

#define Q_CLOSE		1	/* Explicitly close the connection; does *
				 * not return a response or take params  */

#define Q_UPTIME	10	/* Return parameters like "uptime"       *
				 *     param: (none)                     *
				 *     result: <uptime_secs> <load1*100> *
				 *             <load5*100> <load15*100>  *
				 *             <nusers> <nprocs>         */

#define Q_DISKFREE	20	/* Return free space on the given FS     *
				 *     param: "/fs/mount/point"          *
				 *     result: "/fs/mount/point"         *
				 *             <totblks> <usedblks>      *
				 *             <resvblks> <totinodes>    *
				 *             <usedinodes> <resvinodes> */

#define Q_QUOTA		21	/* Return user's use and quota on FS     *
				 *     param: "/mount/point" <uid>       *
				 *     result: "/mount/point" <uid>      *
				 *             <usedblks> <blkquota>     *
				 *             <usedfiles> <filequota>   */

#define Q_MEMORY	30	/* Return information on system memory   *
				 *     param: (none)                     *
				 *     result: <memtot> <memfree>        *
				 *             <memshr> <membuff>        *
				 *             <memcached> <swaptot>     *
				 *             <swapfree>                */

#define Q_PROCSTAT	40	/* Return status of process              *
				 *     param: <pid>                      *
				 *     result: "string-from-/proc/N/stat"*/

#define Q_PROCQUERY	41	/* Return PIDs with given command name   *
				 *     param: "name"                     *
				 *     result: "name" <npids> <pid>...   */

#define Q_PROCLIST	42	/* Return all PIDs on system             *
				 *     param: (none)                     *
				 *     result: <npids> <pid>...          */

#define Q_KILL		100	/* Kill the given process                *
                                 *     param: <pid> <signum>             *
                                 *     result: (none)                    */

#define Q_EXEC		101	/* Execute the given program with args   *
				 *     param: "path" <nargs> "arg0"...   *
				 *     result: <pid>                     */

#define Q_REBOOT	199	/* Reboot the system.  Does not return a *
				 * response.  If parameter is zero, will *
				 * try to do "reboot -t3"; otherwise,    *
				 * will reboot immediately.              *
				 *     param: <quick>                    */

#define Q_RESTART	254	/* Restart sysmond.  Does not take a     *
				 * parameter or return a response.       */

#define Q_ERROR		255	/* Indicate an error; only in responses  *
				 *     result: 'query' "error-message"   */

/*************************************************************************/

#endif	/* SYSMOND_H */