2 * ntp.h - NTP definitions for the masses
12 * Calendar arithmetic - contributed by G. Healton
14 #define YEAR_BREAK 500 /* years < this are tm_year values:
15 * Break < AnyFourDigitYear && Break >
18 #define YEAR_PIVOT 98 /* 97/98: years < this are year 2000+
19 * FYI: official UNIX pivot year is
23 * Number of Days since 1 BC Gregorian to 1 January of given year
25 #define julian0(year) (((year) * 365 ) + ((year) > 0 ? (((year) + 3) \
26 / 4 - ((year - 1) / 100) + ((year - 1) / \
30 * Number of days since start of NTP time to 1 January of given year
32 #define ntp0(year) (julian0(year) - julian0(1900))
35 * Number of days since start of UNIX time to 1 January of given year
37 #define unix0(year) (julian0(year) - julian0(1970))
40 * LEAP YEAR test for full 4-digit years (e.g, 1999, 2010)
42 #define isleap_4(y) ((y) % 4 == 0 && !((y) % 100 == 0 && !(y % \
46 * LEAP YEAR test for tm_year (struct tm) years (e.g, 99, 110)
48 #define isleap_tm(y) ((y) % 4 == 0 && !((y) % 100 == 0 && !(((y) \
52 * to convert simple two-digit years to tm_year style years:
54 * if (year < YEAR_PIVOT)
57 * to convert either two-digit OR tm_year years to four-digit years:
59 * if (year < YEAR_PIVOT)
62 * if (year < YEAR_BREAK)
67 * How to get signed characters. On machines where signed char works,
68 * use it. On machines where signed char doesn't work, char had better
71 #ifdef NEED_S_CHAR_TYPEDEF
72 # if SIZEOF_SIGNED_CHAR
73 typedef signed char s_char;
77 /* XXX: Why is this sequent bit INSIDE this test? */
91 * NTP protocol parameters. See section 3.2.6 of the specification.
93 #define NTP_VERSION ((u_char)4) /* current version number */
94 #define NTP_OLDVERSION ((u_char)1) /* oldest credible version */
95 #define NTP_PORT 123 /* included for sake of non-unix machines */
96 #define NTP_UNREACH 16 /* poll interval backoff count */
97 #define NTP_MINDPOLL 6 /* log2 default min poll interval (64 s) */
98 #define NTP_MAXDPOLL 10 /* log2 default max poll interval (~17 m) */
99 #define NTP_MINPOLL 4 /* log2 min poll interval (16 s) */
100 #define NTP_MAXPOLL 17 /* log2 max poll interval (~4.5 h) */
101 #define NTP_MINCLOCK 3 /* minimum survivors */
102 #define NTP_MAXCLOCK 10 /* maximum candidates */
103 #define NTP_SHIFT 8 /* 8 suitable for crystal time base */
104 #define NTP_MAXKEY 65535 /* maximum authentication key number */
105 #define NTP_MAXSESSION 100 /* maximum session key list entries */
106 #define NTP_AUTOMAX 13 /* log2 default max session key lifetime */
107 #define KEY_REVOKE 16 /* log2 default key revoke timeout */
108 #define NTP_FWEIGHT .5 /* clock filter weight */
109 #define CLOCK_SGATE 4. /* popcorn spike gate */
110 #define BURST_INTERVAL1 4 /* first interburst interval (log2) */
111 #define BURST_INTERVAL2 1 /* succeeding interburst intervals (log2) */
112 #define HUFFPUFF 900 /* huff-n'-puff sample interval (s) */
115 * Operations for jitter calculations (these use doubles).
117 * Note that we carefully separate the jitter component from the
118 * dispersion component (frequency error plus precision). The frequency
119 * error component is computed as CLOCK_PHI times the difference between
120 * the epoch of the time measurement and the reference time. The
121 * precision componen is computed as the square root of the mean of the
122 * squares of a zero-mean, uniform distribution of unit maximum
123 * amplitude. Whether this makes statistical sense may be arguable.
125 #define SQUARE(x) ((x) * (x))
126 #define SQRT(x) (sqrt(x))
127 #define DIFF(x, y) (SQUARE((x) - (y)))
128 #define LOGTOD(a) ((a) < 0 ? 1. / (1L << -(a)) : \
129 1L << (int)(a)) /* log2 to double */
130 #define UNIVAR(x) (SQUARE(.28867513 * LOGTOD(x))) /* std uniform distr */
131 #define ULOGTOD(a) (1L << (int)(a)) /* ulog2 to double */
132 #define MAXDISPERSE 16. /* max dispersion (square) */
133 #define MINDISPERSE .01 /* min dispersion */
134 #define MAXDISTANCE 1. /* max root distance */
136 #define EVENT_TIMEOUT 0 /* one second, that is */
140 * The following structures are used in the autokey protocol.
142 * The autokey structure holds the values used to authenticate key IDs.
144 struct autokey { /* network byte order */
145 tstamp_t tstamp; /* timestamp */
146 keyid_t key; /* key ID */
147 int32 seq; /* key number */
148 u_int32 siglen; /* signature length */
149 u_int32 pkt[1]; /* start of signature field */
150 u_char *sig; /* signature */
154 * The cookie structure holds the current private value used to
155 * construct session keys.
157 struct cookie { /* network byte order */
158 tstamp_t tstamp; /* timestamp */
159 keyid_t key; /* key ID */
160 u_int32 siglen; /* signature length */
161 u_int32 pkt[1]; /* start of signature field */
162 u_char *sig; /* signature */
166 * The value structure holds variable length data such as public
167 * key, agreement parameters, public valule and leapsecond table.
169 struct value { /* network byte order */
170 tstamp_t tstamp; /* timestamp */
171 tstamp_t fstamp; /* filestamp */
172 u_int32 vallen; /* value length */
173 u_int32 pkt[1]; /* start of value field */
174 u_char *ptr; /* data pointer */
175 u_int32 siglen; /* signature length */
176 u_char *sig; /* signature */
181 * The interface structure is used to hold the addresses and socket
182 * numbers of each of the interfaces we are using.
185 int fd; /* socket this is opened on */
186 int bfd; /* socket for receiving broadcasts */
187 struct sockaddr_in sin; /* interface address */
188 struct sockaddr_in bcast; /* broadcast address */
189 struct sockaddr_in mask; /* interface mask */
190 char name[8]; /* name of interface */
191 int flags; /* interface flags */
192 int last_ttl; /* last TTL specified */
193 volatile long received; /* number of incoming packets */
194 long sent; /* number of outgoing packets */
195 long notsent; /* number of send failures */
199 * Flags for interfaces
201 #define INT_BROADCAST 1 /* can broadcast out this interface */
202 #define INT_BCASTOPEN 2 /* broadcast socket is open */
203 #define INT_LOOPBACK 4 /* the loopback interface */
204 #define INT_MULTICAST 8 /* multicasting enabled */
207 * Define flasher bits (tests 1 through 11 in packet procedure)
208 * These reveal the state at the last grumble from the peer and are
209 * most handy for diagnosing problems, even if not strictly a state
210 * variable in the spec. These are recorded in the peer structure.
212 #define TEST1 0x0001 /* duplicate packet received */
213 #define TEST2 0x0002 /* bogus packet received */
214 #define TEST3 0x0004 /* protocol unsynchronized */
215 #define TEST4 0x0008 /* access denied */
216 #define TEST5 0x0010 /* authentication failed */
217 #define TEST6 0x0020 /* peer clock unsynchronized */
218 #define TEST7 0x0040 /* peer stratum out of bounds */
219 #define TEST8 0x0080 /* root delay/dispersion bounds check */
220 #define TEST9 0x0100 /* peer delay/dispersion bounds check */
221 #define TEST10 0x0200 /* autokey failed */
222 #define TEST11 0x0400 /* proventic not confirmed */
225 * The peer structure. Holds state information relating to the guys
226 * we are peering with. Most of this stuff is from section 3.2 of the
230 struct peer *next; /* pointer to next association */
231 struct peer *ass_next; /* link pointer in associd hash */
232 struct sockaddr_in srcadr; /* address of remote host */
233 struct interface *dstadr; /* pointer to address on local host */
234 associd_t associd; /* association ID */
235 u_char version; /* version number */
236 u_char hmode; /* local association mode */
237 u_char hpoll; /* local poll interval */
238 u_char kpoll; /* last poll interval */
239 u_char minpoll; /* min poll interval */
240 u_char maxpoll; /* max poll interval */
241 u_char burst; /* packets remaining in burst */
242 u_int flags; /* association flags */
243 u_char cast_flags; /* additional flags */
244 u_int flash; /* protocol error test tally bits */
245 u_char last_event; /* last peer error code */
246 u_char num_events; /* number of error events */
247 u_char ttlmax; /* max ttl/refclock mode */
250 * Variables used by reference clock support
252 struct refclockproc *procptr; /* refclock structure pointer */
253 u_char refclktype; /* reference clock type */
254 u_char refclkunit; /* reference clock unit number */
255 u_char sstclktype; /* clock type for system status word */
258 * Variables set by received packet
260 u_char leap; /* local leap indicator */
261 u_char pmode; /* remote association mode */
262 u_char stratum; /* remote stratum */
263 s_char precision; /* remote clock precision */
264 u_char ppoll; /* remote poll interval */
265 u_int32 refid; /* remote reference ID */
266 l_fp reftime; /* update epoch */
269 * Variables used by authenticated client
271 keyid_t keyid; /* current key ID */
273 #define clear_to_zero assoc
274 associd_t assoc; /* peer association ID */
275 u_int32 crypto; /* peer status word */
277 struct value pubkey; /* public key */
278 struct value certif; /* certificate */
279 u_char *keystr; /* host name */
281 keyid_t pkeyid; /* previous key ID */
282 keyid_t hcookie; /* host cookie */
283 struct cookie pcookie; /* peer cookie */
284 struct autokey recauto; /* autokey */
285 u_int32 cmmd; /* peer command */
287 * Variables used by authenticated server
289 keyid_t *keylist; /* session key ID list */
290 int keynumber; /* current key number */
291 struct autokey sndauto; /* autokey */
293 #define clear_to_zero status
297 * Ephemeral state variables
299 u_char status; /* peer status */
300 u_char pollsw; /* what it says */
301 u_char ttl; /* ttl for manycast mode */
302 u_char reach; /* reachability register */
303 u_char unreach; /* unreachable count */
304 u_long epoch; /* reference epoch */
305 u_short filter_nextpt; /* index into filter shift register */
306 double filter_delay[NTP_SHIFT]; /* delay shift register */
307 double filter_offset[NTP_SHIFT]; /* offset shift register */
308 double filter_disp[NTP_SHIFT]; /* dispersion shift register */
309 u_long filter_epoch[NTP_SHIFT]; /* epoch shift register */
310 u_char filter_order[NTP_SHIFT]; /* filter sort index */
311 l_fp org; /* originate time stamp */
312 l_fp rec; /* receive time stamp */
313 l_fp xmt; /* transmit time stamp */
314 double offset; /* peer clock offset */
315 double delay; /* peer roundtrip delay */
316 double jitter; /* peer jitter (squares) */
317 double disp; /* peer dispersion */
318 double estbdelay; /* clock offset to broadcast server */
321 * Variables set by received packet
323 double rootdelay; /* roundtrip delay to primary clock */
324 double rootdispersion; /* dispersion to primary clock */
327 * End of clear-to-zero area
329 u_long update; /* receive epoch */
330 #define end_clear_to_zero update
331 u_long outdate; /* send time last packet */
332 u_long nextdate; /* send time next packet */
333 u_long nextaction; /* peer local activity timeout (refclocks mainly) */
334 void (*action) P((struct peer *)); /* action timeout function */
338 u_long timereset; /* time stat counters were reset */
339 u_long timereceived; /* last packet received time */
340 u_long timereachable; /* last reachable/unreachable time */
342 u_long sent; /* packets sent */
343 u_long received; /* packets received */
344 u_long processed; /* packets processed by the protocol */
345 u_long badauth; /* packets cryptosum failed */
346 u_long bogusorg; /* packets bogus origin */
347 u_long oldpkt; /* packets duplicate packet */
348 u_long seldisptoolarge; /* packets dispersion to large*/
349 u_long selbroken; /* not used */
353 * Values for peer.leap, sys_leap
355 #define LEAP_NOWARNING 0x0 /* normal, no leap second warning */
356 #define LEAP_ADDSECOND 0x1 /* last minute of day has 61 seconds */
357 #define LEAP_DELSECOND 0x2 /* last minute of day has 59 seconds */
358 #define LEAP_NOTINSYNC 0x3 /* overload, clock is free running */
361 * Values for peer.mode
363 #define MODE_UNSPEC 0 /* unspecified (probably old NTP version) */
364 #define MODE_ACTIVE 1 /* symmetric active */
365 #define MODE_PASSIVE 2 /* symmetric passive */
366 #define MODE_CLIENT 3 /* client mode */
367 #define MODE_SERVER 4 /* server mode */
368 #define MODE_BROADCAST 5 /* broadcast mode */
369 #define MODE_CONTROL 6 /* control mode packet */
370 #define MODE_PRIVATE 7 /* implementation defined function */
371 #define MODE_BCLIENT 8 /* broadcast client mode */
374 * Values for peer.stratum, sys_stratum
376 #define STRATUM_REFCLOCK ((u_char)0) /* stratum claimed by primary clock */
377 /* A stratum of 0 in the packet is mapped to 16 internally */
378 #define STRATUM_PKT_UNSPEC ((u_char)0) /* unspecified in packet */
379 #define STRATUM_UNSPEC ((u_char)16) /* unspecified */
382 * Values for peer.flags
384 #define FLAG_CONFIG 0x0001 /* association was configured */
385 #define FLAG_AUTHENABLE 0x0002 /* authentication required */
386 #define FLAG_AUTHENTIC 0x0004 /* last message was authentic */
387 #define FLAG_SKEY 0x0008 /* autokey authentication */
388 #define FLAG_MCAST 0x0010 /* multicast client mode */
389 #define FLAG_REFCLOCK 0x0020 /* this is actually a reference clock */
390 #define FLAG_SYSPEER 0x0040 /* this is one of the selected peers */
391 #define FLAG_PREFER 0x0080 /* this is the preferred peer */
392 #define FLAG_BURST 0x0100 /* burst mode */
393 #define FLAG_IBURST 0x0200 /* initial burst mode */
394 #define FLAG_NOSELECT 0x0400 /* this is a "noselect" peer */
395 #define FLAG_AUTOKEY 0x0800 /* autokey confirmed */
396 #define FLAG_ASSOC 0x1000 /* autokey reqeust */
397 #define FLAG_PROVEN 0x2000 /* proventic confirmed */
400 * Definitions for the clear() routine. We use memset() to clear
401 * the parts of the peer structure which go to zero. These are
402 * used to calculate the start address and length of the area.
404 #define CLEAR_TO_ZERO(p) ((char *)&((p)->clear_to_zero))
405 #define END_CLEAR_TO_ZERO(p) ((char *)&((p)->end_clear_to_zero))
406 #define LEN_CLEAR_TO_ZERO (END_CLEAR_TO_ZERO((struct peer *)0) \
407 - CLEAR_TO_ZERO((struct peer *)0))
408 #define CRYPTO_TO_ZERO(p) ((char *)&((p)->clear_to_zero))
409 #define END_CRYPTO_TO_ZERO(p) ((char *)&((p)->end_clear_to_zero))
410 #define LEN_CRYPTO_TO_ZERO (END_CRYPTO_TO_ZERO((struct peer *)0) \
411 - CRYPTO_TO_ZERO((struct peer *)0))
414 * Reference clock identifiers (for pps signal)
416 #define PPSREFID (u_int32)"PPS " /* used when pps controls stratum>1 */
419 * Reference clock types. Added as necessary.
421 #define REFCLK_NONE 0 /* unknown or missing */
422 #define REFCLK_LOCALCLOCK 1 /* external (e.g., lockclock) */
423 #define REFCLK_GPS_TRAK 2 /* TRAK 8810 GPS Receiver */
424 #define REFCLK_WWV_PST 3 /* PST/Traconex 1020 WWV/H */
425 #define REFCLK_SPECTRACOM 4 /* Spectracom (generic) Receivers */
426 #define REFCLK_TRUETIME 5 /* TrueTime (generic) Receivers */
427 #define REFCLK_IRIG_AUDIO 6 /* IRIG-B/W audio decoder */
428 #define REFCLK_CHU_AUDIO 7 /* CHU audio demodulator/decoder */
429 #define REFCLK_PARSE 8 /* generic driver (usually DCF77,GPS,MSF) */
430 #define REFCLK_GPS_MX4200 9 /* Magnavox MX4200 GPS */
431 #define REFCLK_GPS_AS2201 10 /* Austron 2201A GPS */
432 #define REFCLK_GPS_ARBITER 11 /* Arbiter 1088A/B/ GPS */
433 #define REFCLK_IRIG_TPRO 12 /* KSI/Odetics TPRO-S IRIG */
434 #define REFCLK_ATOM_LEITCH 13 /* Leitch CSD 5300 Master Clock */
435 #define REFCLK_MSF_EES 14 /* EES M201 MSF Receiver */
436 #define REFCLK_GPSTM_TRUE 15 /* OLD TrueTime GPS/TM-TMD Receiver */
437 #define REFCLK_IRIG_BANCOMM 16 /* Bancomm GPS/IRIG Interface */
438 #define REFCLK_GPS_DATUM 17 /* Datum Programmable Time System */
439 #define REFCLK_NIST_ACTS 18 /* NIST Auto Computer Time Service */
440 #define REFCLK_WWV_HEATH 19 /* Heath GC1000 WWV/WWVH Receiver */
441 #define REFCLK_GPS_NMEA 20 /* NMEA based GPS clock */
442 #define REFCLK_GPS_VME 21 /* TrueTime GPS-VME Interface */
443 #define REFCLK_ATOM_PPS 22 /* 1-PPS Clock Discipline */
444 #define REFCLK_PTB_ACTS 23 /* PTB Auto Computer Time Service */
445 #define REFCLK_USNO 24 /* Naval Observatory dialup */
446 #define REFCLK_GPS_HP 26 /* HP 58503A Time/Frequency Receiver */
447 #define REFCLK_ARCRON_MSF 27 /* ARCRON MSF radio clock. */
448 #define REFCLK_SHM 28 /* clock attached thru shared memory */
449 #define REFCLK_PALISADE 29 /* Trimble Navigation Palisade GPS */
450 #define REFCLK_ONCORE 30 /* Motorola UT Oncore GPS */
451 #define REFCLK_GPS_JUPITER 31 /* Rockwell Jupiter GPS receiver */
452 #define REFCLK_CHRONOLOG 32 /* Chrono-log K WWVB receiver */
453 #define REFCLK_DUMBCLOCK 33 /* Dumb localtime clock */
454 #define REFCLK_ULINK 34 /* Ultralink M320 WWVB receiver */
455 #define REFCLK_PCF 35 /* Conrad parallel port radio clock */
456 #define REFCLK_WWV_AUDIO 36 /* WWV/H audio demodulator/decoder */
457 #define REFCLK_FG 37 /* Forum Graphic GPS */
458 #define REFCLK_HOPF_SERIAL 38 /* hopf DCF77/GPS serial line receiver */
459 #define REFCLK_HOPF_PCI 39 /* hopf DCF77/GPS PCI receiver */
460 #define REFCLK_MAX 39 /* Grow as needed... */
463 * We tell reference clocks from real peers by giving the reference
464 * clocks an address of the form 127.127.t.u, where t is the type and
465 * u is the unit number. We define some of this here since we will need
466 * some sanity checks to make sure this address isn't interpretted as
467 * that of a normal peer.
469 #define REFCLOCK_ADDR 0x7f7f0000 /* 127.127.0.0 */
470 #define REFCLOCK_MASK 0xffff0000 /* 255.255.0.0 */
472 #define ISREFCLOCKADR(srcadr) ((SRCADR(srcadr) & REFCLOCK_MASK) \
476 * Macro for checking for invalid addresses. This is really, really
477 * gross, but is needed so no one configures a host on net 127 now that
478 * we're encouraging it the the configuration file.
480 #define LOOPBACKADR 0x7f000001
481 #define LOOPNETMASK 0xff000000
483 #define ISBADADR(srcadr) (((SRCADR(srcadr) & LOOPNETMASK) \
484 == (LOOPBACKADR & LOOPNETMASK)) \
485 && (SRCADR(srcadr) != LOOPBACKADR))
488 * Utilities for manipulating addresses and port numbers
490 #define NSRCADR(src) ((src)->sin_addr.s_addr) /* address in net byte order */
491 #define NSRCPORT(src) ((src)->sin_port) /* port in net byte order */
492 #define SRCADR(src) (ntohl(NSRCADR((src)))) /* address in host byte order */
493 #define SRCPORT(src) (ntohs(NSRCPORT((src)))) /* host port */
496 * NTP packet format. The mac field is optional. It isn't really
497 * an l_fp either, but for now declaring it that way is convenient.
498 * See Appendix A in the specification.
500 * Note that all u_fp and l_fp values arrive in network byte order
501 * and must be converted (except the mac, which isn't, really).
504 u_char li_vn_mode; /* leap indicator, version and mode */
505 u_char stratum; /* peer stratum */
506 u_char ppoll; /* peer poll interval */
507 s_char precision; /* peer clock precision */
508 u_fp rootdelay; /* distance to primary clock */
509 u_fp rootdispersion; /* clock dispersion */
510 u_int32 refid; /* reference clock ID */
511 l_fp reftime; /* time peer clock was last updated */
512 l_fp org; /* originate time stamp */
513 l_fp rec; /* receive time stamp */
514 l_fp xmt; /* transmit time stamp */
516 #define LEN_PKT_NOMAC 12 * sizeof(u_int32) /* min header length */
517 #define LEN_PKT_MAC LEN_PKT_NOMAC + sizeof(u_int32)
518 #define MIN_MAC_LEN 3 * sizeof(u_int32) /* DES */
519 #define MAX_MAC_LEN 5 * sizeof(u_int32) /* MD5 */
522 * The length of the packet less MAC must be a multiple of 64
523 * with an RSA modulus and Diffie-Hellman prime of 64 octets
524 * and maximum host name of 128 octets, the maximum autokey
525 * command is 152 octets and maximum autokey response is 460
526 * octets. A packet can contain no more than one command and one
527 * response, so the maximum total extension field length is 672
528 * octets. But, to handle humungus certificates, the bank must
533 u_int32 exten[5000 / 4]; /* max extension field */
535 u_int32 exten[672 / 4]; /* max extension field */
538 u_int32 exten[1]; /* misused */
540 u_char mac[MAX_MAC_LEN]; /* mac */
544 * Stuff for extracting things from li_vn_mode
546 #define PKT_MODE(li_vn_mode) ((u_char)((li_vn_mode) & 0x7))
547 #define PKT_VERSION(li_vn_mode) ((u_char)(((li_vn_mode) >> 3) & 0x7))
548 #define PKT_LEAP(li_vn_mode) ((u_char)(((li_vn_mode) >> 6) & 0x3))
551 * Stuff for putting things back into li_vn_mode
553 #define PKT_LI_VN_MODE(li, vn, md) \
554 ((u_char)((((li) << 6) & 0xc0) | (((vn) << 3) & 0x38) | ((md) & 0x7)))
558 * Dealing with stratum. 0 gets mapped to 16 incoming, and back to 0
561 #define PKT_TO_STRATUM(s) ((u_char)(((s) == (STRATUM_PKT_UNSPEC)) ?\
562 (STRATUM_UNSPEC) : (s)))
564 #define STRATUM_TO_PKT(s) ((u_char)(((s) == (STRATUM_UNSPEC)) ?\
565 (STRATUM_PKT_UNSPEC) : (s)))
568 * Event codes. Used for reporting errors/events to the control module
570 #define PEER_EVENT 0x80 /* this is a peer event */
575 #define EVNT_UNSPEC 0 /* unspecified */
576 #define EVNT_SYSRESTART 1 /* system restart */
577 #define EVNT_SYSFAULT 2 /* wsystem or hardware fault */
578 #define EVNT_SYNCCHG 3 /* new leap or synch change */
579 #define EVNT_PEERSTCHG 4 /* new source or stratum */
580 #define EVNT_CLOCKRESET 5 /* clock reset */
581 #define EVNT_BADDATETIM 6 /* invalid time or date */
582 #define EVNT_CLOCKEXCPT 7 /* reference clock exception */
587 #define EVNT_PEERIPERR (1 | PEER_EVENT) /* IP error */
588 #define EVNT_PEERAUTH (2 | PEER_EVENT) /* authentication failure */
589 #define EVNT_UNREACH (3 | PEER_EVENT) /* change to unreachable */
590 #define EVNT_REACH (4 | PEER_EVENT) /* change to reachable */
591 #define EVNT_PEERCLOCK (5 | PEER_EVENT) /* clock exception */
596 #define CEVNT_NOMINAL 0 /* unspecified */
597 #define CEVNT_TIMEOUT 1 /* poll timeout */
598 #define CEVNT_BADREPLY 2 /* bad reply format */
599 #define CEVNT_FAULT 3 /* hardware or software fault */
600 #define CEVNT_PROP 4 /* propagation failure */
601 #define CEVNT_BADDATE 5 /* bad date format or value */
602 #define CEVNT_BADTIME 6 /* bad time format or value */
603 #define CEVNT_MAX CEVNT_BADTIME
606 * Very misplaced value. Default port through which we send traps.
608 #define TRAPPORT 18447
612 * To speed lookups, peers are hashed by the low order bits of the
613 * remote IP address. These definitions relate to that.
616 #define HASH_MASK (HASH_SIZE-1)
617 #define HASH_ADDR(src) ((SRCADR((src))^(SRCADR((src))>>8)) & HASH_MASK)
620 * How we randomize polls. The poll interval is a power of two.
621 * We chose a random value which is between 1/4 and 3/4 of the
622 * poll interval we would normally use and which is an even multiple
623 * of the EVENT_TIMEOUT. The random number routine, given an argument
624 * spread value of n, returns an integer between 0 and (1<<n)-1. This
625 * is shifted by EVENT_TIMEOUT and added to the base value.
627 #if defined(HAVE_MRAND48)
628 # define RANDOM (mrand48())
629 # define SRANDOM(x) (srand48(x))
631 # define RANDOM (random())
632 # define SRANDOM(x) (srandom(x))
635 #define RANDPOLL(x) ((1 << (x)) - 1 + (RANDOM & 0x3))
636 #define RANDOM_SPREAD(poll) ((poll) - (EVENT_TIMEOUT+1))
637 #define RANDOM_POLL(poll, rval) ((((rval)+1)<<EVENT_TIMEOUT) + (1<<((poll)-2)))
640 * min, min3 and max. Makes it easier to transliterate the spec without
643 #define min(a,b) (((a) < (b)) ? (a) : (b))
644 #define max(a,b) (((a) > (b)) ? (a) : (b))
645 #define min3(a,b,c) min(min((a),(b)), (c))
649 * Configuration items. These are for the protocol module (proto_config())
651 #define PROTO_BROADCLIENT 1
652 #define PROTO_PRECISION 2 /* (not used) */
653 #define PROTO_AUTHENTICATE 3
654 #define PROTO_BROADDELAY 4
655 #define PROTO_AUTHDELAY 5 /* (not used) */
656 #define PROTO_MULTICAST_ADD 6
657 #define PROTO_MULTICAST_DEL 7
659 #define PROTO_KERNEL 9
660 #define PROTO_MONITOR 10
661 #define PROTO_FILEGEN 11
666 * Configuration items for the loop filter
668 #define LOOP_DRIFTINIT 1 /* set initial frequency offset */
669 #define LOOP_DRIFTCOMP 2 /* set frequency offset */
670 #define LOOP_MAX 3 /* set step offset */
671 #define LOOP_PANIC 4 /* set panic offseet */
672 #define LOOP_PHI 5 /* set dispersion rate */
673 #define LOOP_MINSTEP 6 /* set step timeout */
674 #define LOOP_MINPOLL 7 /* set min poll interval (log2 s) */
675 #define LOOP_ALLAN 8 /* set minimum Allan intercept */
676 #define LOOP_HUFFPUFF 9 /* set huff-n'-puff filter length */
679 * Configuration items for the stats printer
681 #define STATS_FREQ_FILE 1 /* configure drift file */
682 #define STATS_STATSDIR 2 /* directory prefix for stats files */
683 #define STATS_PID_FILE 3 /* configure ntpd PID file */
685 #define MJD_1970 40587 /* MJD for 1 Jan 1970 */
688 * Default parameters. We use these in the absence of something better.
690 #define DEFBROADDELAY 4e-3 /* default broadcast offset */
691 #define INADDR_NTP 0xe0000101 /* NTP multicast address 224.0.1.1 */
694 * Structure used optionally for monitoring when this is turned on.
697 struct mon_data *hash_next; /* next structure in hash list */
698 struct mon_data *mru_next; /* next structure in MRU list */
699 struct mon_data *mru_prev; /* previous structure in MRU list */
700 struct mon_data *fifo_next; /* next structure in FIFO list */
701 struct mon_data *fifo_prev; /* previous structure in FIFO list */
702 u_long lastdrop; /* last time dropped due to RES_LIMIT*/
703 u_long lasttime; /* last time data updated */
704 u_long firsttime; /* time structure initialized */
705 u_long count; /* count we have seen */
706 u_int32 rmtadr; /* address of remote host */
707 struct interface *interface; /* interface on which this arrived */
708 u_short rmtport; /* remote port last came from */
709 u_char mode; /* mode of incoming packet */
710 u_char version; /* version of incoming packet */
711 u_char cast_flags; /* flags MDF_?CAST */
715 * Values for cast_flags
717 #define MDF_UCAST 0x01 /* unicast */
718 #define MDF_MCAST 0x02 /* multicast */
719 #define MDF_BCAST 0x04 /* broadcast */
720 #define MDF_LCAST 0x08 /* localcast */
721 #define MDF_ACAST 0x10 /* manycast */
722 #define MDF_BCLNT 0x20 /* broadcast client */
725 * Values used with mon_enabled to indicate reason for enabling monitoring
727 #define MON_OFF 0x00 /* no monitoring */
728 #define MON_ON 0x01 /* monitoring explicitly enabled */
729 #define MON_RES 0x02 /* implicit monitoring for RES_LIMITED */
731 * Structure used for restrictlist entries
733 struct restrictlist {
734 struct restrictlist *next; /* link to next entry */
735 u_int32 addr; /* host address (host byte order) */
736 u_int32 mask; /* mask for address (host byte order) */
737 u_long count; /* number of packets matched */
738 u_short flags; /* accesslist flags */
739 u_short mflags; /* match flags */
745 #define RES_IGNORE 0x001 /* ignore if matched */
746 #define RES_DONTSERVE 0x002 /* don't give him any time */
747 #define RES_DONTTRUST 0x004 /* don't trust if matched */
748 #define RES_NOQUERY 0x008 /* don't allow queries if matched */
749 #define RES_NOMODIFY 0x010 /* don't allow him to modify server */
750 #define RES_NOPEER 0x020 /* don't allocate memory resources */
751 #define RES_NOTRAP 0x040 /* don't allow him to set traps */
752 #define RES_LPTRAP 0x080 /* traps set by him are low priority */
753 #define RES_LIMITED 0x100 /* limit per net number of clients */
754 #define RES_VERSION 0x200 /* serve only current version */
755 #define RES_DEMOBILIZE 0x400 /* demobilize association */
757 #define RES_ALLFLAGS \
758 (RES_IGNORE | RES_DONTSERVE | RES_DONTTRUST | RES_NOQUERY | \
759 RES_NOMODIFY | RES_NOPEER | RES_NOTRAP | RES_LPTRAP | \
760 RES_LIMITED | RES_VERSION | RES_DEMOBILIZE)
765 #define RESM_INTERFACE 0x1 /* this is an interface */
766 #define RESM_NTPONLY 0x2 /* match ntp port only */
769 * Restriction configuration ops
771 #define RESTRICT_FLAGS 1 /* add flags to restrict entry */
772 #define RESTRICT_UNFLAG 2 /* remove flags from restrict entry */
773 #define RESTRICT_REMOVE 3 /* remove a restrict entry */
777 * Experimental alternate selection algorithm identifiers
786 * Endpoint structure for the select algorithm
789 double val; /* offset of endpoint */
790 int type; /* interval entry/exit */
794 * Defines for association matching
796 #define AM_MODES 10 /* total number of modes */
797 #define NO_PEER 0 /* action when no peer is found */
800 * Association matching AM[] return codes
806 #define AM_MANYCAST 3
811 /* NetInfo configuration locations */
813 #define NETINFO_CONFIG_DIR "/config/ntp"