707 lines
26 KiB
C
707 lines
26 KiB
C
/*
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* ntp.h - NTP definitions for the masses
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*/
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#include "ntp_types.h"
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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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#if !defined(S_CHAR_DEFINED)
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#if defined(NO_SIGNED_CHAR_DECL)
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typedef char s_char;
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#else
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typedef signed char s_char;
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#endif
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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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/*
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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)3) /* 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_MAXSKEW 1 /* 1 sec, skew after NTP_MAXAGE w/o updates */
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#define NTP_SKEWINC 49170 /* skew increment for clock updates (l_f) */
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#define NTP_SKEWFACTOR 16 /* approximation of factor for peer calcs */
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#define NTP_MAXDISTANCE (1 * FP_SECOND) /* max. rootdelay for synchr. */
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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 14 /* log2 max poll interval (~4.5 h) */
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#define NTP_MINCLOCK 3 /* minimum for outlyer detection */
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#define NTP_MAXCLOCK 10 /* maximum select list size */
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#define NTP_MINDISPERSE (FP_SECOND / 100) /* min dispersion (u_fp 10 ms) */
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#define NTP_MAXDISPERSE (FP_SECOND * 16) /* max dispersion (u_fp 16 s) */
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#define NTP_DISPFACTOR 20 /* MAXDISPERSE as a shift (u_fp 16 s) */
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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_MAXD 3 /* log2 estimated error averaging factor */
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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. Note that the
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* loop filter code will have to change if you change CLOCK_MAX
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* to be greater than or equal to 500 ms.
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*
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* Note these parameters have been rescaled for a time constant range from
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* 0 through 10, with 2 corresoponding to the old time constant of 0.
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*/
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#define CLOCK_MINSTEP 900 /* step timeout (sec) */
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#define CLOCK_ADJ 0 /* log2 adjustment interval (1 sec) */
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#define CLOCK_DSCALE 20 /* skew reg. scale: unit is 2**-20 ~= 1 ppm */
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#define CLOCK_FREQ 16 /* log2 frequency weight (65536) */
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#define CLOCK_PHASE 6 /* log2 phase weight (64) */
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#define CLOCK_LIMIT 30 /* time constant adjust threshold */
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#define CLOCK_G 2 /* log2 frequency averaging factor */
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#define CLOCK_MAXSEC 800 /* max update interval for pll */
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#define CLOCK_MAX_FP 0x000020c5 /* max clock offset (s_fp 128 ms) */
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#define CLOCK_MAX_F 0x20c49ba6 /* max clock offset (l_fp 128 ms) */
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#define CLOCK_MAX_I 0x00000000 /* both fractional and integral parts */
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#define CLOCK_WAYTOOBIG 1000 /* if clock 1000 sec off, forget it */
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/*
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* Event timers are actually implemented as a sorted queue of expiry
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* times. The queue is slotted, with each slot holding timers which
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* expire in a 2**(NTP_MINPOLL-1) (8) second period. The timers in
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* each slot are sorted by increasing expiry time. The number of
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* slots is 2**(NTP_MAXPOLL-(NTP_MINPOLL-1)), or 512, to cover a time
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* period of 2**NTP_MAXPOLL (16384) seconds into the future before
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* wrapping.
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*/
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#define EVENT_TIMEOUT CLOCK_ADJ
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struct event {
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struct event *next; /* next in chain */
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struct event *prev; /* previous in chain */
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struct peer *peer; /* peer this counter belongs to */
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void (*event_handler)(); /* routine to call to handle event */
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u_long event_time; /* expiry time of counter */
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};
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#define TIMER_SLOTTIME (1<<(NTP_MINPOLL-1))
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#define TIMER_NSLOTS (1<<(NTP_MAXPOLL-(NTP_MINPOLL-1)))
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#define TIMER_SLOT(t) (((t) >> (NTP_MINPOLL-1)) & (TIMER_NSLOTS-1))
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/*
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* TIMER_ENQUEUE() puts stuff on the timer queue. It takes as
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* arguments (ea), an array of event slots, and (iev), the event
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* to be inserted. This one searches the hash bucket from the
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* end, and is about optimum for the timing requirements of
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* NTP peers.
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*/
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#define TIMER_ENQUEUE(ea, iev) \
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do { \
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register struct event *ev; \
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\
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ev = (ea)[TIMER_SLOT((iev)->event_time)].prev; \
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while (ev->event_time > (iev)->event_time) \
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ev = ev->prev; \
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(iev)->prev = ev; \
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(iev)->next = ev->next; \
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(ev)->next->prev = (iev); \
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(ev)->next = (iev); \
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} while(0)
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/*
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* TIMER_INSERT() also puts stuff on the timer queue, but searches the
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* bucket from the top. This is better for things that do very short
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* time outs, like clock support.
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*/
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#define TIMER_INSERT(ea, iev) \
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do { \
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register struct event *ev; \
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\
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ev = (ea)[TIMER_SLOT((iev)->event_time)].next; \
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while (ev->event_time != 0 && \
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ev->event_time < (iev)->event_time) \
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ev = ev->next; \
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(iev)->next = ev; \
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(iev)->prev = ev->prev; \
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(ev)->prev->next = (iev); \
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(ev)->prev = (iev); \
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} while(0)
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/*
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* Remove an event from the queue.
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*/
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#define TIMER_DEQUEUE(ev) \
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do { \
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if ((ev)->next != 0) { \
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(ev)->next->prev = (ev)->prev; \
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(ev)->prev->next = (ev)->next; \
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(ev)->next = (ev)->prev = 0; \
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} \
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} while (0)
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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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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 0x01 /* duplicate packet received */
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#define TEST2 0x02 /* bogus packet received */
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#define TEST3 0x04 /* protocol unsynchronized */
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#define TEST4 0x08 /* peer delay/dispersion bounds check */
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#define TEST5 0x10 /* peer authentication failed */
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#define TEST6 0x20 /* peer clock unsynchronized */
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#define TEST7 0x40 /* peer stratum out of bounds */
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#define TEST8 0x80 /* root delay/dispersion bounds check */
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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 sutuff */
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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 version; /* version number */
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u_char flags; /* peer flags */
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u_char cast_flags; /* flags MDF_?CAST */
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u_char flash; /* peer flashers (for maint) */
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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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s_fp rootdelay; /* distance from primary clock */
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u_fp rootdispersion; /* peer clock dispersion */
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U_LONG refid; /* peer reference ID */
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l_fp reftime; /* time of peer's last update */
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struct event event_timer; /* event queue entry */
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U_LONG keyid; /* encription key ID */
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U_LONG pkeyid; /* keyid used to encrypt last message */
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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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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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s_fp filter_delay[NTP_SHIFT]; /* delay part of shift register */
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l_fp filter_offset[NTP_SHIFT]; /* offset part of shift register */
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s_fp filter_soffset[NTP_SHIFT]; /* offset in s_fp format, for disp */
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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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/* ***End of clear-to-zero area.*** */
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/* Everything that is cleared to zero goes above here */
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u_char filter_order[NTP_SHIFT]; /* we keep the filter sorted here */
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#define end_clear_to_zero filter_order[0]
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u_fp filter_error[NTP_SHIFT]; /* error part of shift register */
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long update; /* base sys_clock for skew calc.s */
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s_fp delay; /* filter estimated delay */
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u_fp dispersion; /* filter estimated dispersion */
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l_fp offset; /* filter estimated clock offset */
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s_fp soffset; /* fp version of above */
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s_fp synch; /* synch distance from above */
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u_fp selectdisp; /* select dispersion */
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s_fp estbdelay; /* broadcast offset */
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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 candidate; /* position after candidate selection */
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u_char select; /* position at end of falseticker sel */
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u_char was_sane; /* set to 1 if it passed sanity check */
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u_char correct; /* set to 1 if it passed correctness check */
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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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/*
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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_LONG)"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_WWVB_SPECTRACOM 4 /* Spectracom 8170/Netclock WWVB */
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#define REFCLK_GOES_TRUETIME 5 /* TrueTime 468-DC GOES */
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#define REFCLK_IRIG_AUDIO 6 /* IRIG-B audio decoder */
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#define REFCLK_CHU 7 /* scratchbuilt CHU (Canada) */
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#define REFCLK_PARSE 8 /* generic driver (usually DCF77,GPS) */
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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_OMEGA_TRUETIME 11 /* TrueTime OM-DC OMEGA */
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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_TRUETIME 15 /* 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_MOTO 21 /* Motorola GPS clock */
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#define REFCLK_ATOM_PPS 22 /* 1-PPS Clock Discipline */
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#define REFCLK_MAX 24 /* maximum index (room to expand) */
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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 */
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#define SRCPORT(src) (ntohs(NSRCPORT((src)))) /* host port */
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/*
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* NTP packet format. The mac field is optional. It isn't really
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* an l_fp either, but for now declaring it that way is convenient.
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* See Appendix A in the specification.
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*
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* Note that all u_fp and l_fp values arrive in network byte order
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* and must be converted (except the mac, which isn't, really).
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*/
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struct pkt {
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u_char li_vn_mode; /* contains leap indicator, version and mode */
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u_char stratum; /* peer's stratum */
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u_char ppoll; /* the peer polling interval */
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s_char precision; /* peer clock precision */
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s_fp rootdelay; /* distance to primary clock */
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u_fp rootdispersion; /* clock dispersion */
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U_LONG refid; /* reference clock ID */
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l_fp reftime; /* time peer clock was last updated */
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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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|
|
|
#define MIN_MAC_LEN (sizeof(U_LONG) + 8) /* DES */
|
|
#define MAX_MAC_LEN (sizeof(U_LONG) + 16) /* MD5 */
|
|
|
|
U_LONG keyid; /* key identification */
|
|
u_char mac[MAX_MAC_LEN-sizeof(U_LONG)];/* message-authentication code */
|
|
/*l_fp mac;*/
|
|
};
|
|
|
|
/*
|
|
* Packets can come in two flavours, one with a mac and one without.
|
|
*/
|
|
#define LEN_PKT_NOMAC (sizeof(struct pkt) - MAX_MAC_LEN)
|
|
|
|
/*
|
|
* Minimum size of packet with a MAC: has to include at least a key number.
|
|
*/
|
|
#define LEN_PKT_MAC (LEN_PKT_NOMAC + sizeof(U_LONG))
|
|
|
|
/*
|
|
* 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)))
|
|
|
|
/*
|
|
* Format of a recvbuf. These are used by the asynchronous receive
|
|
* routine to store incoming packets and related information.
|
|
*/
|
|
|
|
/*
|
|
* the maximum length NTP packet is a full length NTP control message with
|
|
* the maximum length message authenticator. I hate to hard-code 468 and 12,
|
|
* but only a few modules include ntp_control.h...
|
|
*/
|
|
#define RX_BUFF_SIZE (468+12+MAX_MAC_LEN)
|
|
|
|
struct recvbuf {
|
|
struct recvbuf *next; /* next buffer in chain */
|
|
union {
|
|
struct sockaddr_in X_recv_srcadr;
|
|
caddr_t X_recv_srcclock;
|
|
} X_from_where;
|
|
#define recv_srcadr X_from_where.X_recv_srcadr
|
|
#define recv_srcclock X_from_where.X_recv_srcclock
|
|
struct sockaddr_in srcadr; /* where packet came from */
|
|
struct interface *dstadr; /* interface datagram arrived thru */
|
|
int fd; /* fd on which it was received */
|
|
l_fp recv_time; /* time of arrival */
|
|
void (*receiver)(); /* routine to receive buffer */
|
|
int recv_length; /* number of octets received */
|
|
union {
|
|
struct pkt X_recv_pkt;
|
|
char X_recv_buffer[RX_BUFF_SIZE];
|
|
} recv_space;
|
|
#define recv_pkt recv_space.X_recv_pkt
|
|
#define recv_buffer recv_space.X_recv_buffer
|
|
};
|
|
|
|
|
|
/*
|
|
* 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)
|
|
|
|
|
|
/*
|
|
* The poll update procedure takes an extra argument which controls
|
|
* how a random perturbation is applied to peer.timer. The choice is
|
|
* to not randomize at all, to randomize only if we're going to update
|
|
* peer.timer, and to randomize no matter what (almost, the algorithm
|
|
* is that we apply the random value if it is less than the current
|
|
* timer count).
|
|
*/
|
|
#define POLL_NOTRANDOM 0 /* don't randomize */
|
|
#define POLL_RANDOMCHANGE 1 /* if you change, change randomly */
|
|
#define POLL_MAKERANDOM 2 /* randomize next interval */
|
|
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
#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
|
|
#define PROTO_AUTHENTICATE 3
|
|
#define PROTO_BROADDELAY 4
|
|
#define PROTO_AUTHDELAY 5
|
|
#define PROTO_MULTICAST_ADD 6
|
|
#define PROTO_MULTICAST_DEL 7
|
|
#define PROTO_PLL 8
|
|
#define PROTO_PPS 9
|
|
#define PROTO_MONITOR 10
|
|
#define PROTO_FILEGEN 11
|
|
|
|
/*
|
|
* Configuration items for the loop filter
|
|
*/
|
|
#define LOOP_DRIFTCOMP 1 /* set frequency offset */
|
|
#define LOOP_PPSDELAY 2 /* set pps delay */
|
|
#define LOOP_PPSBAUD 3 /* 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 xntpd PID file */
|
|
|
|
#define MJD_1970 40587 /* MJD for 1 Jan 1970 */
|
|
|
|
/*
|
|
* Default parameters. We use these in the absense of something better.
|
|
*/
|
|
#define DEFPRECISION (-7) /* default precision (~10 ms) */
|
|
#define DEFBROADDELAY 0x00000100 /* default broadcast offset */
|
|
/* (~4 ms as s_fp) */
|
|
#define DEFAUTHDELAY 0x00080000 /* default authentcation delay */
|
|
/* (~100 us as l_fp.u_f) */
|
|
#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_LONG 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 1 /* unicast packet */
|
|
#define MDF_MCAST 2 /* multicast packet */
|
|
#define MDF_BCAST 4 /* broadcast packet */
|
|
#define MDF_LCAST 8 /* local 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_LONG addr; /* host address (host byte order) */
|
|
U_LONG 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 {
|
|
s_fp val; /* offset of endpoint */
|
|
int type; /* interval entry/exit */
|
|
};
|