ntpdc.h

网络时间协议NTP 源码 版本v4.2.0b 该源码用于linux平台下

/*
 * ntpdc.h - definitions of interest to ntpdc
 */
#include "ntp_fp.h"
#include "ntp.h"
#include "ntp_request.h"
#include "ntp_string.h"
#include "ntp_malloc.h"

/*
 * Maximum number of arguments
 */
#define	MAXARGS	4
#define	MOREARGS 4
/*
 * Flags for forming descriptors.
 */
#define	OPT		0x80	/* this argument is optional, or'd with type */

#define	NO		0x0
#define	NTP_STR		0x1	/* string argument */
#define	NTP_UINT	0x2	/* unsigned integer */
#define	NTP_INT		0x3	/* signed integer */
#define	NTP_ADD		0x4	/* IP network address */
#define IP_VERSION	0x5	/* IP version */

/*
 * Arguments are returned in a union
 */
typedef union {
	char *string;
	long ival;
	u_long uval;
	struct sockaddr_storage netnum;
} arg_v;

/*
 * Structure for passing parsed command line
 */
struct parse {
	char *keyword;
	arg_v argval[MAXARGS + MOREARGS];
	int nargs;
};

/*
 * ntpdc includes a command parser which could charitably be called
 * crude.  The following structure is used to define the command
 * syntax.
 */
struct xcmd {
  const char *keyword;		/* command key word */
	void (*handler)	P((struct parse *, FILE *));	/* command handler */
	u_char arg[MAXARGS];	/* descriptors for arguments */
  const char *desc[MAXARGS];	/* descriptions for arguments */
  const char *comment;
};

extern	int impl_ver;
extern	int showhostnames;
extern	int s_port;

extern	int	doquery	P((int, int, int, int, int, char *, int *, int *, char **, int, int));
extern	char *	nntohost	P((struct sockaddr_storage *));