718 lines
26 KiB
C
718 lines
26 KiB
C
/*
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* ntp.h - NTP definitions for the masses
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*/
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#ifndef NTP_H
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#define NTP_H
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#include "ntp_types.h"
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#include <math.h>
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/* common definitions for Y2K repairs [ Y2KFixes */
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/* (this might better be put in ntp_calendar.h) */
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#define YEAR_BREAK 500 /* assume years < this are tm_year values: */
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/* Break < AnyFourDigitYear
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&& Break > Anytm_yearYear */
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#define YEAR_PIVOT 98 /* 97/98: assume years < this are year 2000+ */
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/* FYI: official UNIX pivot year is 68/69 */
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/* Number of Days since (mythical) 1.BC Gregorian to 1 January of given year*/
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#define julian0(year) \
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( \
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( (year) * 365 ) + ( (year) > 0 \
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? ( ((year)+3) / 4 - ((year-1) / 100) + ((year-1) / 400) ) \
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: 0 ) \
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)
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/* Number of days since start of NTP time to 1 January of given year */
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#define ntp0(year) ( julian0(year) - julian0(1900) )
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/* Number of days since start of UNIX time to 1 January of given year */
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#define unix0(year) ( julian0(year) - julian0(1970) )
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/* LEAP YEAR test for full 4-digit years (e.g, 1999, 2010) */
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#define isleap_4(y) /* a TRUE and PROPER leap year test */ \
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((y)%4 == 0 && !((y)%100 == 0 && !(y%400 == 0)))
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/* NOTE: year 2000 TRULY IS A LEAP YEAR!!! */
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/* LEAP YEAR test for tm_year (struct tm) years (e.g, 99, 110) */
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#define isleap_tm(y) /* a TRUE and PROPER leap year test */ \
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((y)%4 == 0 && !((y)%100 == 0 && !(((y)+1900)%400 == 0)))
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/* to convert simple two-digit years to tm_year style years:
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if ( year < YEAR_PIVOT ) year += 100;
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* to convert either two-digit OR tm_year years to four-digit years:
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if ( year < YEAR_PIVOT ) year += 100;
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if ( year < YEAR_BREAK ) year += 1900;
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CALL TO STANDARD:
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* As the Internet is an INTERNATIONAL network, it makes SENSE to use
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the international standard ISO 8601 to format dates and times.
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Basically this is yyyy-mm-dd for years and hh:mm:ss for times
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(joining the two togeather in computer readable media calls for
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yyyy-mm-ddThh:mm:ss, though yyyy-mm-dd hh:mm:ss is often used
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for human readable forms even though it is not not strictly
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valid ISO 8601). Standard time-zone offsets ([+-]hh:mm) are allowed.
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ghealton ] Y2KFixes */
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/*
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* How to get signed characters. On machines where signed char works,
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* use it. On machines where signed char doesn't work, char had better
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* be signed.
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*/
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#ifdef NEED_S_CHAR_TYPEDEF
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# if SIZEOF_SIGNED_CHAR
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typedef signed char s_char;
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# else
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typedef char s_char;
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# endif
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/* XXX: Why is this sequent bit INSIDE this test? */
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# ifdef sequent
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# undef SO_RCVBUF
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# undef SO_SNDBUF
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# endif
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#endif
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#ifndef TRUE
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# define TRUE 1
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#endif /* TRUE */
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#ifndef FALSE
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# define FALSE 0
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#endif /* FALSE */
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/*
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* NTP protocol parameters. See section 3.2.6 of the specification.
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*/
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#define NTP_VERSION ((u_char)4) /* current version number */
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#define NTP_OLDVERSION ((u_char)1) /* oldest credible version */
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#define NTP_PORT 123 /* included for sake of non-unix machines */
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#define NTP_MAXSTRATUM ((u_char)15) /* max stratum, infinity a la Bellman-Ford */
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#define NTP_MAXAGE 86400 /* one day in seconds */
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#define NTP_UNREACH 16 /* poll interval backoff count */
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#define NTP_MINDPOLL 6 /* log2 default min poll interval (64 s) */
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#define NTP_MAXDPOLL 10 /* log2 default max poll interval (~17 m) */
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#define NTP_MINPOLL 4 /* log2 min poll interval (16 s) */
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#define NTP_MAXPOLL 17 /* log2 max poll interval (~4.5 h) */
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#define NTP_MINCLOCK 3 /* minimum survivors */
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#define NTP_CANCLOCK 6 /* minimum candidates */
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#define NTP_MAXCLOCK 10 /* maximum candidates */
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#define NTP_WINDOW 8 /* reachability register size */
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#define NTP_SHIFT 8 /* 8 suitable for crystal time base */
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#define NTP_MAXKEY 65535 /* maximum authentication key number */
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#define NTP_MAXSESSION 100 /* maximum entries on session key list */
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#define NTP_AUTOMAX 12 /* log2 default max session key lifetime */
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#define KEY_REVOKE 16 /* log2 default key revoke timeout */
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#define NTP_FWEIGHT .5 /* clock filter weight */
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#define NTP_SWEIGHT .75 /* select weight */
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#define CLOCK_SGATE 10. /* popcorn spike gate */
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#define BURST_INTERVAL1 4 /* first interburst interval (log2) */
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#define BURST_INTERVAL2 1 /* succeeding interburst intervals (log2) */
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/*
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* Operations for jitter (variance) calculations (these use doubles).
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* Note that we carefully separate the jitter component from the dispersion
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* component (frequency error plus precision). The frequency error
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* component is computed as CLOCK_PHI times the difference between the epoch
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* of the time measurement and the reference time. The precision componen
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* is computed as the square root of the mean of the squares of a zero-
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* mean, uniform distribution of unit maximum amplitude. Whether this
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* makes statistical sense may be arguable.
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*/
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#define SQUARE(x) ((x) * (x))
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#define SQRT(x) (sqrt(x))
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#define DIFF(x, y) (SQUARE((x) - (y)))
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#define LOGTOD(a) ((a) < 0 ? 1. / (1L << -(a)) : \
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1L << (int)(a)) /* log2 to double */
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#define UNIVAR(x) (SQUARE(.28867513 * LOGTOD(x))) /* std uniform distr */
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#define ULOGTOD(a) (1L << (int)(a)) /* ulog2 to double */
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#define MAXDISPERSE 16. /* max dispersion (square) */
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#define MINDISPERSE .01 /* min dispersion */
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#define MAXDISTANCE 1. /* max root distance */
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/*
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* Loop filter parameters. See section 5.1 of the specification.
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*
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* Note that these are appropriate for a crystal time base. If your
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* system clock is line frequency controlled you should read the
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* specification for appropriate modifications.
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*/
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#define CLOCK_PHI 15e-6 /* max frequency wander */
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#define EVENT_TIMEOUT 0 /* one second, that is */
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/*
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* The interface structure is used to hold the addresses and socket
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* numbers of each of the interfaces we are using.
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*/
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struct interface {
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int fd; /* socket this is opened on */
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int bfd; /* socket for receiving broadcasts */
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struct sockaddr_in sin; /* interface address */
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struct sockaddr_in bcast; /* broadcast address */
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struct sockaddr_in mask; /* interface mask */
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char name[8]; /* name of interface */
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int flags; /* interface flags */
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int last_ttl; /* last TTL specified */
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volatile long received; /* number of incoming packets */
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long sent; /* number of outgoing packets */
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long notsent; /* number of send failures */
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};
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/*
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* Flags for interfaces
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*/
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#define INT_BROADCAST 1 /* can broadcast out this interface */
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#define INT_BCASTOPEN 2 /* broadcast socket is open */
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#define INT_LOOPBACK 4 /* the loopback interface */
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#define INT_MULTICAST 8 /* multicasting enabled */
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/*
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* Define flasher bits (tests 1 through 8 in packet procedure)
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* These reveal the state at the last grumble from the peer and are
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* most handy for diagnosing problems, even if not strictly a state
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* variable in the spec. These are recorded in the peer structure.
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*/
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#define TEST1 0x0001 /* duplicate packet received */
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#define TEST2 0x0002 /* bogus packet received */
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#define TEST3 0x0004 /* protocol unsynchronized */
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#define TEST4 0x0008 /* peer delay/dispersion bounds check */
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#define TEST5 0x0010 /* peer authentication failed */
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#define TEST6 0x0020 /* peer clock unsynchronized */
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#define TEST7 0x0040 /* peer stratum out of bounds */
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#define TEST8 0x0080 /* root delay/dispersion bounds check */
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#define TEST9 0x0100 /* peer not authenticated */
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#define TEST10 0x0200 /* access denied */
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/*
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* The peer structure. Holds state information relating to the guys
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* we are peering with. Most of this stuff is from section 3.2 of the
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* spec.
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*/
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struct peer {
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struct peer *next;
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struct peer *ass_next; /* link pointer in associd hash */
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struct sockaddr_in srcadr; /* address of remote host */
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struct interface *dstadr; /* pointer to address on local host */
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struct refclockproc *procptr; /* pointer to reference clock stuff */
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u_char leap; /* leap indicator */
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u_char hmode; /* association mode with this peer */
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u_char pmode; /* peer's association mode */
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u_char stratum; /* stratum of remote peer */
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s_char precision; /* peer's clock precision */
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u_char ppoll; /* peer poll interval */
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u_char hpoll; /* local host poll interval */
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u_char minpoll; /* min local host poll interval */
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u_char maxpoll; /* max local host poll interval */
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u_char burst; /* packets remaining in burst */
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u_char version; /* version number */
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u_int flags; /* peer flags */
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u_char cast_flags; /* flags MDF_?CAST */
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u_int flash; /* protocol error tally bits */
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u_char refclktype; /* reference clock type */
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u_char refclkunit; /* reference clock unit number */
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u_char sstclktype; /* clock type for system status word */
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u_int32 refid; /* peer reference ID */
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l_fp reftime; /* update epoch */
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u_long keyid; /* current key ID */
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u_long pkeyid; /* previous key ID (autokey) */
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u_long *keylist; /* session key identifier list */
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int keynumber; /* session key identifier number */
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u_short associd; /* association ID, a unique integer */
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u_char ttl; /* time to live (multicast) */
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/* **Start of clear-to-zero area.*** */
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/* Everything that is cleared to zero goes below here */
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u_char valid; /* valid counter */
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#define clear_to_zero valid
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double estbdelay; /* broadcast offset */
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u_char status; /* peer status */
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u_char pollsw; /* what it says */
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u_char reach; /* reachability, NTP_WINDOW bits */
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u_char unreach; /* unreachable count */
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u_short filter_nextpt; /* index into filter shift register */
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double filter_delay[NTP_SHIFT]; /* delay part of shift register */
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double filter_offset[NTP_SHIFT]; /* offset part of shift register */
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double filter_disp[NTP_SHIFT]; /* dispersion part of shift register */
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u_long filter_epoch[NTP_SHIFT]; /* epoch part of shift register */
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u_char filter_order[NTP_SHIFT]; /* we keep the filter sorted here */
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l_fp org; /* originate time stamp */
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l_fp rec; /* receive time stamp */
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l_fp xmt; /* transmit time stamp */
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double offset; /* peer clock offset */
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double delay; /* peer roundtrip delay */
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double variance; /* peer variance (jitter) */
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double disp; /* peer dispersion */
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double rootdelay; /* roundtrip delay to primary clock */
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double rootdispersion; /* dispersion to primary clock */
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u_long epoch; /* reference epoch */
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/* ***End of clear-to-zero area.*** */
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/* Everything that is cleared to zero goes above here */
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u_long update; /* receive epoch */
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#define end_clear_to_zero update
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u_long outdate; /* send time last packet */
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u_long nextdate; /* send time next packet */
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u_long nextaction; /* peer local activity timeout (refclocks mainly) */
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void (*action) P((struct peer *));/* action timeout function */
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/*
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* statistic counters
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*/
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u_long timereset; /* time stat counters were reset */
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u_long sent; /* number of updates sent */
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u_long received; /* number of frames received */
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u_long timereceived; /* last time a frame received */
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u_long timereachable; /* last reachable/unreachable event */
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u_long processed; /* processed by the protocol */
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u_long badauth; /* bad credentials detected */
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u_long bogusorg; /* rejected due to bogus origin */
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u_long oldpkt; /* rejected as duplicate packet */
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u_long seldisptoolarge; /* too much dispersion for selection */
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u_long selbroken; /* broken NTP detected in selection */
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u_long seltooold; /* too long since sync in selection */
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u_char last_event; /* set to code for last peer error */
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u_char num_events; /* num. of events which have occurred */
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};
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/*
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* Values for peer.leap, sys_leap
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*/
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#define LEAP_NOWARNING 0x0 /* normal, no leap second warning */
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#define LEAP_ADDSECOND 0x1 /* last minute of day has 61 seconds */
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#define LEAP_DELSECOND 0x2 /* last minute of day has 59 seconds */
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#define LEAP_NOTINSYNC 0x3 /* overload, clock is free running */
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/*
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* Values for peer.mode
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*/
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#define MODE_UNSPEC 0 /* unspecified (probably old NTP version) */
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#define MODE_ACTIVE 1 /* symmetric active */
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#define MODE_PASSIVE 2 /* symmetric passive */
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#define MODE_CLIENT 3 /* client mode */
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#define MODE_SERVER 4 /* server mode */
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#define MODE_BROADCAST 5 /* broadcast mode */
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#define MODE_CONTROL 6 /* control mode packet */
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#define MODE_PRIVATE 7 /* implementation defined function */
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#define MODE_BCLIENT 8 /* a pseudo mode, used internally */
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#define MODE_MCLIENT 9 /* multicast mode, used internally */
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/*
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* Values for peer.stratum, sys_stratum
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*/
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#define STRATUM_REFCLOCK ((u_char)0) /* stratum claimed by primary clock */
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#define STRATUM_PRIMARY ((u_char)1) /* host has a primary clock */
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#define STRATUM_INFIN ((u_char)NTP_MAXSTRATUM) /* infinity a la Bellman-Ford */
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/* A stratum of 0 in the packet is mapped to 16 internally */
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#define STRATUM_PKT_UNSPEC ((u_char)0) /* unspecified in packet */
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#define STRATUM_UNSPEC ((u_char)(NTP_MAXSTRATUM+(u_char)1)) /* unspecified */
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/*
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* Values for peer.flags
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*/
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#define FLAG_CONFIG 0x1 /* association was configured */
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#define FLAG_AUTHENABLE 0x2 /* this guy needs authentication */
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#define FLAG_MCAST1 0x4 /* multicast client/server mode */
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#define FLAG_MCAST2 0x8 /* multicast client mode */
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#define FLAG_AUTHENTIC 0x10 /* last message was authentic */
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#define FLAG_REFCLOCK 0x20 /* this is actually a reference clock */
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#define FLAG_SYSPEER 0x40 /* this is one of the selected peers */
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#define FLAG_PREFER 0x80 /* this is the preferred peer */
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#define FLAG_BURST 0x100 /* burst mode */
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#define FLAG_SKEY 0x200 /* autokey authentication */
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#define FLAG_NOSELECT 0x400 /* this is a "noselect" peer */
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/*
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* Definitions for the clear() routine. We use memset() to clear
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* the parts of the peer structure which go to zero. These are
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* used to calculate the start address and length of the area.
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*/
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#define CLEAR_TO_ZERO(p) ((char *)&((p)->clear_to_zero))
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#define END_CLEAR_TO_ZERO(p) ((char *)&((p)->end_clear_to_zero))
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#define LEN_CLEAR_TO_ZERO (END_CLEAR_TO_ZERO((struct peer *)0) \
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- CLEAR_TO_ZERO((struct peer *)0))
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/*
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* Reference clock identifiers (for pps signal)
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*/
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#define PPSREFID (u_int32)"PPS " /* used when pps controls stratum>1 */
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/*
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* Reference clock types. Added as necessary.
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*/
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#define REFCLK_NONE 0 /* unknown or missing */
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#define REFCLK_LOCALCLOCK 1 /* external (e.g., lockclock) */
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#define REFCLK_GPS_TRAK 2 /* TRAK 8810 GPS Receiver */
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#define REFCLK_WWV_PST 3 /* PST/Traconex 1020 WWV/H */
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#define REFCLK_SPECTRACOM 4 /* Spectracom (generic) Receivers */
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#define REFCLK_TRUETIME 5 /* TrueTime (generic) Receivers */
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#define REFCLK_IRIG_AUDIO 6 /* IRIG-B/W audio decoder */
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#define REFCLK_CHU_AUDIO 7 /* CHU audio demodulator/decoder */
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#define REFCLK_PARSE 8 /* generic driver (usually DCF77,GPS,MSF) */
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#define REFCLK_GPS_MX4200 9 /* Magnavox MX4200 GPS */
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#define REFCLK_GPS_AS2201 10 /* Austron 2201A GPS */
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#define REFCLK_GPS_ARBITER 11 /* Arbiter 1088A/B/ GPS */
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#define REFCLK_IRIG_TPRO 12 /* KSI/Odetics TPRO-S IRIG */
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#define REFCLK_ATOM_LEITCH 13 /* Leitch CSD 5300 Master Clock */
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#define REFCLK_MSF_EES 14 /* EES M201 MSF Receiver */
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#define REFCLK_GPSTM_TRUE 15 /* OLD TrueTime GPS/TM-TMD Receiver */
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#define REFCLK_IRIG_BANCOMM 16 /* Bancomm GPS/IRIG Interface */
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#define REFCLK_GPS_DATUM 17 /* Datum Programmable Time System */
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#define REFCLK_NIST_ACTS 18 /* NIST Auto Computer Time Service */
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#define REFCLK_WWV_HEATH 19 /* Heath GC1000 WWV/WWVH Receiver */
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#define REFCLK_GPS_NMEA 20 /* NMEA based GPS clock */
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#define REFCLK_GPS_VME 21 /* TrueTime GPS-VME Interface */
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#define REFCLK_ATOM_PPS 22 /* 1-PPS Clock Discipline */
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#define REFCLK_PTB_ACTS 23 /* PTB Auto Computer Time Service */
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#define REFCLK_USNO 24 /* Naval Observatory dialup */
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#define REFCLK_GPS_HP 26 /* HP 58503A Time/Frequency Receiver */
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#define REFCLK_ARCRON_MSF 27 /* ARCRON MSF radio clock. */
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#define REFCLK_SHM 28 /* clock attached thru shared memory */
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#define REFCLK_PALISADE 29 /* Trimble Navigation Palisade GPS */
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#define REFCLK_ONCORE 30 /* Motorola UT Oncore GPS */
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#define REFCLK_GPS_JUPITER 31 /* Rockwell Jupiter GPS receiver */
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#define REFCLK_CHRONOLOG 32 /* Chrono-log K WWVB receiver */
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#define REFCLK_DUMBCLOCK 33 /* Dumb localtime clock */
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#define REFCLK_ULINK 34 /* Ultralink M320 WWVB receiver */
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#define REFCLK_PCF 35 /* Conrad parallel port radio clock */
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#define REFCLK_WWV_AUDIO 36 /* WWV/H audio demodulator/decoder */
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#define REFCLK_FG 37 /* Forum Graphic GPS */
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#define REFCLK_MAX 37 /* Grow as needed... */
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/*
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* We tell reference clocks from real peers by giving the reference
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* clocks an address of the form 127.127.t.u, where t is the type and
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* u is the unit number. We define some of this here since we will need
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* some sanity checks to make sure this address isn't interpretted as
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* that of a normal peer.
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*/
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#define REFCLOCK_ADDR 0x7f7f0000 /* 127.127.0.0 */
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#define REFCLOCK_MASK 0xffff0000 /* 255.255.0.0 */
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#define ISREFCLOCKADR(srcadr) ((SRCADR(srcadr) & REFCLOCK_MASK) \
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== REFCLOCK_ADDR)
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/*
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* Macro for checking for invalid addresses. This is really, really
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* gross, but is needed so no one configures a host on net 127 now that
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* we're encouraging it the the configuration file.
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*/
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#define LOOPBACKADR 0x7f000001
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#define LOOPNETMASK 0xff000000
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#define ISBADADR(srcadr) (((SRCADR(srcadr) & LOOPNETMASK) \
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== (LOOPBACKADR & LOOPNETMASK)) \
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&& (SRCADR(srcadr) != LOOPBACKADR))
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/*
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* Utilities for manipulating addresses and port numbers
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*/
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#define NSRCADR(src) ((src)->sin_addr.s_addr) /* address in net byte order */
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#define NSRCPORT(src) ((src)->sin_port) /* port in net byte order */
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#define SRCADR(src) (ntohl(NSRCADR((src)))) /* address in host byte order */
|
|
#define SRCPORT(src) (ntohs(NSRCPORT((src)))) /* host port */
|
|
|
|
/*
|
|
* NTP packet format. The mac field is optional. It isn't really
|
|
* an l_fp either, but for now declaring it that way is convenient.
|
|
* See Appendix A in the specification.
|
|
*
|
|
* Note that all u_fp and l_fp values arrive in network byte order
|
|
* and must be converted (except the mac, which isn't, really).
|
|
*/
|
|
struct pkt {
|
|
u_char li_vn_mode; /* contains leap indicator, version and mode */
|
|
u_char stratum; /* peer's stratum */
|
|
u_char ppoll; /* the peer polling interval */
|
|
s_char precision; /* peer clock precision */
|
|
u_fp rootdelay; /* distance to primary clock */
|
|
u_fp rootdispersion; /* clock dispersion */
|
|
u_int32 refid; /* reference clock ID */
|
|
l_fp reftime; /* time peer clock was last updated */
|
|
l_fp org; /* originate time stamp */
|
|
l_fp rec; /* receive time stamp */
|
|
l_fp xmt; /* transmit time stamp */
|
|
|
|
#define MIN_MAC_LEN (sizeof(u_int32) + 8) /* DES */
|
|
#define MAX_MAC_LEN (sizeof(u_int32) + 16) /* MD5 */
|
|
|
|
/*
|
|
* The length of the packet less MAC must be a multiple of 64
|
|
* bits. For normal private-key cryptography, the cryptosum
|
|
* covers only the raw NTP header. For autokey cryptography,
|
|
* the heade is incresed by 64 bits to contain the field length
|
|
* and private value.
|
|
*/
|
|
u_int32 keyid1; /* key identifier 1 */
|
|
u_int32 keyid2; /* key identifier 2 */
|
|
u_int32 keyid3; /* key identifier 3 */
|
|
u_char mac[MAX_MAC_LEN]; /* mac */
|
|
};
|
|
|
|
/*
|
|
* Packets can come in two flavours, one with a mac and one without.
|
|
*/
|
|
#define LEN_PKT_NOMAC (sizeof(struct pkt) - MAX_MAC_LEN - 3 * sizeof(u_int32))
|
|
|
|
/*
|
|
* Minimum size of packet with a MAC: has to include at least a key number.
|
|
*/
|
|
#define LEN_PKT_MAC (LEN_PKT_NOMAC + sizeof(u_int32))
|
|
|
|
/*
|
|
* Stuff for extracting things from li_vn_mode
|
|
*/
|
|
#define PKT_MODE(li_vn_mode) ((u_char)((li_vn_mode) & 0x7))
|
|
#define PKT_VERSION(li_vn_mode) ((u_char)(((li_vn_mode) >> 3) & 0x7))
|
|
#define PKT_LEAP(li_vn_mode) ((u_char)(((li_vn_mode) >> 6) & 0x3))
|
|
|
|
/*
|
|
* Stuff for putting things back into li_vn_mode
|
|
*/
|
|
#define PKT_LI_VN_MODE(li, vn, md) \
|
|
((u_char)((((li) << 6) & 0xc0) | (((vn) << 3) & 0x38) | ((md) & 0x7)))
|
|
|
|
|
|
/*
|
|
* Dealing with stratum. 0 gets mapped to 16 incoming, and back to 0
|
|
* on output.
|
|
*/
|
|
#define PKT_TO_STRATUM(s) ((u_char)(((s) == (STRATUM_PKT_UNSPEC)) ?\
|
|
(STRATUM_UNSPEC) : (s)))
|
|
|
|
#define STRATUM_TO_PKT(s) ((u_char)(((s) == (STRATUM_UNSPEC)) ?\
|
|
(STRATUM_PKT_UNSPEC) : (s)))
|
|
|
|
|
|
/*
|
|
* Event codes. Used for reporting errors/events to the control module
|
|
*/
|
|
#define PEER_EVENT 0x80 /* this is a peer event */
|
|
|
|
#define EVNT_UNSPEC 0
|
|
#define EVNT_SYSRESTART 1
|
|
#define EVNT_SYSFAULT 2
|
|
#define EVNT_SYNCCHG 3
|
|
#define EVNT_PEERSTCHG 4
|
|
#define EVNT_CLOCKRESET 5
|
|
#define EVNT_BADDATETIM 6
|
|
#define EVNT_CLOCKEXCPT 7
|
|
|
|
#define EVNT_PEERIPERR (1|PEER_EVENT)
|
|
#define EVNT_PEERAUTH (2|PEER_EVENT)
|
|
#define EVNT_UNREACH (3|PEER_EVENT)
|
|
#define EVNT_REACH (4|PEER_EVENT)
|
|
#define EVNT_PEERCLOCK (5|PEER_EVENT)
|
|
|
|
/*
|
|
* Clock event codes
|
|
*/
|
|
#define CEVNT_NOMINAL 0
|
|
#define CEVNT_TIMEOUT 1
|
|
#define CEVNT_BADREPLY 2
|
|
#define CEVNT_FAULT 3
|
|
#define CEVNT_PROP 4
|
|
#define CEVNT_BADDATE 5
|
|
#define CEVNT_BADTIME 6
|
|
#define CEVNT_MAX CEVNT_BADTIME
|
|
|
|
/*
|
|
* Very misplaced value. Default port through which we send traps.
|
|
*/
|
|
#define TRAPPORT 18447
|
|
|
|
|
|
/*
|
|
* To speed lookups, peers are hashed by the low order bits of the remote
|
|
* IP address. These definitions relate to that.
|
|
*/
|
|
#define HASH_SIZE 32
|
|
#define HASH_MASK (HASH_SIZE-1)
|
|
#define HASH_ADDR(src) ((SRCADR((src))^(SRCADR((src))>>8)) & HASH_MASK)
|
|
|
|
/*
|
|
* How we randomize polls. The poll interval is a power of two.
|
|
* We chose a random value which is between 1/4 and 3/4 of the
|
|
* poll interval we would normally use and which is an even multiple
|
|
* of the EVENT_TIMEOUT. The random number routine, given an argument
|
|
* spread value of n, returns an integer between 0 and (1<<n)-1. This
|
|
* is shifted by EVENT_TIMEOUT and added to the base value.
|
|
*/
|
|
#if defined(HAVE_MRAND48)
|
|
#define RANDOM (mrand48())
|
|
#define SRANDOM(x) (srand48(x))
|
|
#elif defined(HAVE_RANDOM)
|
|
#define RANDOM (random())
|
|
#define SRANDOM(x) (srandom(x))
|
|
#else
|
|
#define RANDOM (0)
|
|
#define SRANDOM(x) (0)
|
|
#endif
|
|
|
|
#define RANDPOLL(x) ((1 << (x)) - 1 + (RANDOM & 0x3))
|
|
#define RANDOM_SPREAD(poll) ((poll) - (EVENT_TIMEOUT+1))
|
|
#define RANDOM_POLL(poll, rval) ((((rval)+1)<<EVENT_TIMEOUT) + (1<<((poll)-2)))
|
|
|
|
/*
|
|
* min, min3 and max. Makes it easier to transliterate the spec without
|
|
* thinking about it.
|
|
*/
|
|
#define min(a,b) (((a) < (b)) ? (a) : (b))
|
|
#define max(a,b) (((a) > (b)) ? (a) : (b))
|
|
#define min3(a,b,c) min(min((a),(b)), (c))
|
|
|
|
|
|
/*
|
|
* Configuration items. These are for the protocol module (proto_config())
|
|
*/
|
|
#define PROTO_BROADCLIENT 1
|
|
#define PROTO_PRECISION 2 /* (not used) */
|
|
#define PROTO_AUTHENTICATE 3
|
|
#define PROTO_BROADDELAY 4
|
|
#define PROTO_AUTHDELAY 5 /* (not used) */
|
|
#define PROTO_MULTICAST_ADD 6
|
|
#define PROTO_MULTICAST_DEL 7
|
|
#define PROTO_NTP 8
|
|
#define PROTO_KERNEL 9
|
|
#define PROTO_MONITOR 10
|
|
#define PROTO_FILEGEN 11
|
|
|
|
/*
|
|
* Configuration items for the loop filter
|
|
*/
|
|
#define LOOP_DRIFTINIT 1 /* set initial frequency offset */
|
|
#define LOOP_DRIFTCOMP 2 /* set frequency offset */
|
|
#define LOOP_PPSDELAY 3 /* set pps delay */
|
|
#define LOOP_PPSBAUD 4 /* set pps baud rate */
|
|
|
|
/*
|
|
* Configuration items for the stats printer
|
|
*/
|
|
#define STATS_FREQ_FILE 1 /* configure drift file */
|
|
#define STATS_STATSDIR 2 /* directory prefix for stats files */
|
|
#define STATS_PID_FILE 3 /* configure ntpd PID file */
|
|
|
|
#define MJD_1970 40587 /* MJD for 1 Jan 1970 */
|
|
|
|
/*
|
|
* Default parameters. We use these in the absence of something better.
|
|
*/
|
|
#define DEFBROADDELAY 4e-3 /* default broadcast offset */
|
|
#define INADDR_NTP 0xe0000101 /* NTP multicast address 224.0.1.1 */
|
|
/*
|
|
* Structure used optionally for monitoring when this is turned on.
|
|
*/
|
|
struct mon_data {
|
|
struct mon_data *hash_next; /* next structure in hash list */
|
|
struct mon_data *mru_next; /* next structure in MRU list */
|
|
struct mon_data *mru_prev; /* previous structure in MRU list */
|
|
struct mon_data *fifo_next; /* next structure in FIFO list */
|
|
struct mon_data *fifo_prev; /* previous structure in FIFO list */
|
|
u_long lastdrop; /* last time dropped due to RES_LIMIT*/
|
|
u_long lasttime; /* last time data updated */
|
|
u_long firsttime; /* time structure initialized */
|
|
u_long count; /* count we have seen */
|
|
u_int32 rmtadr; /* address of remote host */
|
|
struct interface *interface; /* interface on which this arrived */
|
|
u_short rmtport; /* remote port last came from */
|
|
u_char mode; /* mode of incoming packet */
|
|
u_char version; /* version of incoming packet */
|
|
u_char cast_flags; /* flags MDF_?CAST */
|
|
};
|
|
|
|
#define MDF_UCAST 0x1 /* unicast packet */
|
|
#define MDF_MCAST 0x2 /* multicast packet */
|
|
#define MDF_BCAST 0x4 /* broadcast packet */
|
|
#define MDF_LCAST 0x8 /* local packet */
|
|
#define MDF_ACAST 0x10 /* manycast packet */
|
|
|
|
/*
|
|
* Values used with mon_enabled to indicate reason for enabling monitoring
|
|
*/
|
|
#define MON_OFF 0x00 /* no monitoring */
|
|
#define MON_ON 0x01 /* monitoring explicitly enabled */
|
|
#define MON_RES 0x02 /* implicit monitoring for RES_LIMITED */
|
|
/*
|
|
* Structure used for restrictlist entries
|
|
*/
|
|
struct restrictlist {
|
|
struct restrictlist *next; /* link to next entry */
|
|
u_int32 addr; /* host address (host byte order) */
|
|
u_int32 mask; /* mask for address (host byte order) */
|
|
u_long count; /* number of packets matched */
|
|
u_short flags; /* accesslist flags */
|
|
u_short mflags; /* match flags */
|
|
};
|
|
|
|
/*
|
|
* Access flags
|
|
*/
|
|
#define RES_IGNORE 0x1 /* ignore if matched */
|
|
#define RES_DONTSERVE 0x2 /* don't give him any time */
|
|
#define RES_DONTTRUST 0x4 /* don't trust if matched */
|
|
#define RES_NOQUERY 0x8 /* don't allow queries if matched */
|
|
#define RES_NOMODIFY 0x10 /* don't allow him to modify server */
|
|
#define RES_NOPEER 0x20 /* don't allocate memory resources */
|
|
#define RES_NOTRAP 0x40 /* don't allow him to set traps */
|
|
#define RES_LPTRAP 0x80 /* traps set by him are low priority */
|
|
#define RES_LIMITED 0x100 /* limit per net number of clients */
|
|
|
|
#define RES_ALLFLAGS \
|
|
(RES_IGNORE|RES_DONTSERVE|RES_DONTTRUST|RES_NOQUERY\
|
|
|RES_NOMODIFY|RES_NOPEER|RES_NOTRAP|RES_LPTRAP|RES_LIMITED)
|
|
|
|
/*
|
|
* Match flags
|
|
*/
|
|
#define RESM_INTERFACE 0x1 /* this is an interface */
|
|
#define RESM_NTPONLY 0x2 /* match ntp port only */
|
|
|
|
/*
|
|
* Restriction configuration ops
|
|
*/
|
|
#define RESTRICT_FLAGS 1 /* add flags to restrict entry */
|
|
#define RESTRICT_UNFLAG 2 /* remove flags from restrict entry */
|
|
#define RESTRICT_REMOVE 3 /* remove a restrict entry */
|
|
|
|
|
|
/*
|
|
* Experimental alternate selection algorithm identifiers
|
|
*/
|
|
#define SELECT_1 1
|
|
#define SELECT_2 2
|
|
#define SELECT_3 3
|
|
#define SELECT_4 4
|
|
#define SELECT_5 5
|
|
|
|
/*
|
|
* Endpoint structure for the select algorithm
|
|
*/
|
|
struct endpoint {
|
|
double val; /* offset of endpoint */
|
|
int type; /* interval entry/exit */
|
|
};
|
|
|
|
/*
|
|
* Defines for association matching
|
|
*/
|
|
#define AM_MODES 10 /* total number of modes */
|
|
#define NO_PEER 0 /* action when no peer is found */
|
|
|
|
/*
|
|
* Association matching AM[] return codes
|
|
*/
|
|
#define AM_ERR -1
|
|
#define AM_NOMATCH 0
|
|
#define AM_PROCPKT 1
|
|
#define AM_FXMIT 2
|
|
#define AM_MANYCAST 3
|
|
#define AM_NEWPASS 4
|
|
#define AM_NEWBCL 5
|
|
#define AM_POSSBCL 6
|
|
|
|
/* NetInfo configuration locations */
|
|
#ifdef HAVE_NETINFO
|
|
#define NETINFO_CONFIG_DIR "/config/ntp"
|
|
#endif
|
|
|
|
#endif /* NTP_H */
|