116 lines
3 KiB
C
116 lines
3 KiB
C
/*
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$Header: /cvs/src/chrony/ntp.h,v 1.12 2003/09/22 21:22:30 richard Exp $
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=======================================================================
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chronyd/chronyc - Programs for keeping computer clocks accurate.
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**********************************************************************
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* Copyright (C) Richard P. Curnow 1997-2003
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*
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**********************************************************************
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=======================================================================
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Header file containing common NTP bits and pieces
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*/
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#ifndef GOT_NTP_H
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#define GOT_NTP_H
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#ifdef HAS_STDINT_H
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#include <stdint.h>
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#elif defined(HAS_INTTYPES_H)
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#include <inttypes.h>
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#endif
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typedef struct {
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uint32_t hi;
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uint32_t lo;
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} NTP_int64;
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typedef uint32_t NTP_int32;
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#define AUTH_DATA_LEN 16
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/* Type definition for leap bits */
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typedef enum {
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LEAP_Normal = 0,
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LEAP_InsertSecond = 1,
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LEAP_DeleteSecond = 2,
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LEAP_Unsynchronised = 3
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} NTP_Leap;
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typedef enum {
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MODE_UNDEFINED = 0,
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MODE_ACTIVE = 1,
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MODE_PASSIVE = 2,
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MODE_CLIENT = 3,
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MODE_SERVER = 4,
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MODE_BROADCAST = 5
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} NTP_Mode;
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typedef struct {
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uint8_t lvm;
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uint8_t stratum;
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int8_t poll;
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int8_t precision;
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NTP_int32 root_delay;
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NTP_int32 root_dispersion;
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NTP_int32 reference_id;
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NTP_int64 reference_ts;
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NTP_int64 originate_ts;
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NTP_int64 receive_ts;
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NTP_int64 transmit_ts;
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NTP_int32 auth_keyid;
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uint8_t auth_data[AUTH_DATA_LEN];
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} NTP_Packet;
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/* We have to declare a buffer type to hold a datagram read from the
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network. Even though we won't be using them (yet?!), this must be
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large enough to hold NTP control messages. */
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/* Define the maximum number of bytes that can be read in a single
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message. (This is cribbed from ntp.h in the xntpd source code). */
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#define MAX_NTP_MESSAGE_SIZE (468+12+16+4)
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typedef union {
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NTP_Packet ntp_pkt;
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uint8_t arbitrary[MAX_NTP_MESSAGE_SIZE];
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} ReceiveBuffer;
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#define NTP_NORMAL_PACKET_SIZE (sizeof(NTP_Packet) - (sizeof(NTP_int32) + AUTH_DATA_LEN))
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/* ================================================== */
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inline static double
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int32_to_double(NTP_int32 x)
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{
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return (double) ntohl(x) / 65536.0;
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}
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/* ================================================== */
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inline static NTP_int32
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double_to_int32(double x)
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{
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return htonl((NTP_int32)(0.5 + 65536.0 * x));
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}
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/* ================================================== */
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#endif /* GOT_NTP_H */
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