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ntp.h (302408) ntp.h (54359)
1/*
2 * ntp.h - NTP definitions for the masses
3 */
1/*
2 * ntp.h - NTP definitions for the masses
3 */
4
4#ifndef NTP_H
5#define NTP_H
6
5#ifndef NTP_H
6#define NTP_H
7
7#include <stddef.h>
8#include "ntp_types.h"
8#include <math.h>
9
9#include <math.h>
10
10#include <ntp_fp.h>
11#include <ntp_types.h>
12#include <ntp_lists.h>
13#include <ntp_stdlib.h>
14#include <ntp_crypto.h>
15#include <ntp_random.h>
16#include <ntp_net.h>
11 /* common definitions for Y2K repairs [ Y2KFixes */
17
12
18#include <isc/boolean.h>
13 /* (this might better be put in ntp_calendar.h) */
14#define YEAR_BREAK 500 /* assume years < this are tm_year values: */
15 /* Break < AnyFourDigitYear
16 && Break > Anytm_yearYear */
17#define YEAR_PIVOT 98 /* 97/98: assume years < this are year 2000+ */
18 /* FYI: official UNIX pivot year is 68/69 */
19
19
20/*
21 * Calendar arithmetic - contributed by G. Healton
22 */
23#define YEAR_BREAK 500 /* years < this are tm_year values:
24 * Break < AnyFourDigitYear && Break >
25 * Anytm_yearYear */
20 /* Number of Days since (mythical) 1.BC Gregorian to 1 January of given year*/
21#define julian0(year) \
22 ( \
23 ( (year) * 365 ) + ( (year) > 0 \
24 ? ( ((year)+3) / 4 - ((year-1) / 100) + ((year-1) / 400) ) \
25 : 0 ) \
26 )
26
27
27#define YEAR_PIVOT 98 /* 97/98: years < this are year 2000+
28 * FYI: official UNIX pivot year is
29 * 68/69 */
28 /* Number of days since start of NTP time to 1 January of given year */
29#define ntp0(year) ( julian0(year) - julian0(1900) )
30
30
31/*
32 * Number of Days since 1 BC Gregorian to 1 January of given year
33 */
34#define julian0(year) (((year) * 365 ) + ((year) > 0 ? (((year) + 3) \
35 / 4 - ((year - 1) / 100) + ((year - 1) / \
36 400)) : 0))
31 /* Number of days since start of UNIX time to 1 January of given year */
32#define unix0(year) ( julian0(year) - julian0(1970) )
37
33
38/*
39 * Number of days since start of NTP time to 1 January of given year
40 */
41#define ntp0(year) (julian0(year) - julian0(1900))
34 /* LEAP YEAR test for full 4-digit years (e.g, 1999, 2010) */
35#define isleap_4(y) /* a TRUE and PROPER leap year test */ \
36 ((y)%4 == 0 && !((y)%100 == 0 && !(y%400 == 0)))
37 /* NOTE: year 2000 TRULY IS A LEAP YEAR!!! */
42
38
43/*
44 * Number of days since start of UNIX time to 1 January of given year
45 */
46#define unix0(year) (julian0(year) - julian0(1970))
39 /* LEAP YEAR test for tm_year (struct tm) years (e.g, 99, 110) */
40#define isleap_tm(y) /* a TRUE and PROPER leap year test */ \
41 ((y)%4 == 0 && !((y)%100 == 0 && !(((y)+1900)%400 == 0)))
47
42
48/*
49 * LEAP YEAR test for full 4-digit years (e.g, 1999, 2010)
50 */
51#define isleap_4(y) ((y) % 4 == 0 && !((y) % 100 == 0 && !(y % \
52 400 == 0)))
43 /* to convert simple two-digit years to tm_year style years:
44 if ( year < YEAR_PIVOT ) year += 100;
53
45
54/*
55 * LEAP YEAR test for tm_year (struct tm) years (e.g, 99, 110)
56 */
57#define isleap_tm(y) ((y) % 4 == 0 && !((y) % 100 == 0 && !(((y) \
58 + 1900) % 400 == 0)))
46 * to convert either two-digit OR tm_year years to four-digit years:
47 if ( year < YEAR_PIVOT ) year += 100;
48 if ( year < YEAR_BREAK ) year += 1900;
59
49
60/*
61 * to convert simple two-digit years to tm_year style years:
62 *
63 * if (year < YEAR_PIVOT)
64 * year += 100;
65 *
66 * to convert either two-digit OR tm_year years to four-digit years:
67 *
68 * if (year < YEAR_PIVOT)
69 * year += 100;
70 *
71 * if (year < YEAR_BREAK)
72 * year += 1900;
73 */
50 CALL TO STANDARD:
51 * As the Internet is an INTERNATIONAL network, it makes SENSE to use
52 the international standard ISO 8601 to format dates and times.
53 Basically this is yyyy-mm-dd for years and hh:mm:ss for times
54 (joining the two togeather in computer readable media calls for
55 yyyy-mm-ddThh:mm:ss, though yyyy-mm-dd hh:mm:ss is often used
56 for human readable forms even though it is not not strictly
57 valid ISO 8601). Standard time-zone offsets ([+-]hh:mm) are allowed.
58 ghealton ] Y2KFixes */
74
75/*
76 * How to get signed characters. On machines where signed char works,
59
60/*
61 * How to get signed characters. On machines where signed char works,
77 * use it. On machines where signed char doesn't work, char had better
62 * use it. On machines where signed char doesn't work, char had better
78 * be signed.
79 */
80#ifdef NEED_S_CHAR_TYPEDEF
81# if SIZEOF_SIGNED_CHAR
82typedef signed char s_char;
83# else
84typedef char s_char;
85# endif
86 /* XXX: Why is this sequent bit INSIDE this test? */
87# ifdef sequent
88# undef SO_RCVBUF
89# undef SO_SNDBUF
90# endif
91#endif
63 * be signed.
64 */
65#ifdef NEED_S_CHAR_TYPEDEF
66# if SIZEOF_SIGNED_CHAR
67typedef signed char s_char;
68# else
69typedef char s_char;
70# endif
71 /* XXX: Why is this sequent bit INSIDE this test? */
72# ifdef sequent
73# undef SO_RCVBUF
74# undef SO_SNDBUF
75# endif
76#endif
77#ifndef TRUE
78# define TRUE 1
79#endif /* TRUE */
80#ifndef FALSE
81# define FALSE 0
82#endif /* FALSE */
92
93/*
94 * NTP protocol parameters. See section 3.2.6 of the specification.
95 */
96#define NTP_VERSION ((u_char)4) /* current version number */
97#define NTP_OLDVERSION ((u_char)1) /* oldest credible version */
83
84/*
85 * NTP protocol parameters. See section 3.2.6 of the specification.
86 */
87#define NTP_VERSION ((u_char)4) /* current version number */
88#define NTP_OLDVERSION ((u_char)1) /* oldest credible version */
98#define NTP_PORT 123 /* included for non-unix machines */
99
100/*
101 * Poll interval parameters
102 */
103#define NTP_UNREACH 10 /* poll unreach threshold */
104#define NTP_MINPOLL 3 /* log2 min poll interval (8 s) */
105#define NTP_MINDPOLL 6 /* log2 default min poll (64 s) */
106#define NTP_MAXDPOLL 10 /* log2 default max poll (~17 m) */
107#define NTP_MAXPOLL 17 /* log2 max poll interval (~36 h) */
108#define NTP_RETRY 3 /* max packet retries */
109#define NTP_MINPKT 2 /* guard time (s) */
110
111/*
112 * Clock filter algorithm tuning parameters
113 */
114#define MAXDISPERSE 16. /* max dispersion */
115#define NTP_SHIFT 8 /* clock filter stages */
89#define NTP_PORT 123 /* included for sake of non-unix machines */
90#define NTP_MAXSTRATUM ((u_char)15) /* max stratum, infinity a la Bellman-Ford */
91#define NTP_MAXAGE 86400 /* one day in seconds */
92#define NTP_UNREACH 16 /* poll interval backoff count */
93#define NTP_MINDPOLL 6 /* log2 default min poll interval (64 s) */
94#define NTP_MAXDPOLL 10 /* log2 default max poll interval (~17 m) */
95#define NTP_MINPOLL 4 /* log2 min poll interval (16 s) */
96#define NTP_MAXPOLL 17 /* log2 max poll interval (~4.5 h) */
97#define NTP_MINCLOCK 3 /* minimum survivors */
98#define NTP_CANCLOCK 6 /* minimum candidates */
99#define NTP_MAXCLOCK 10 /* maximum candidates */
100#define NTP_WINDOW 8 /* reachability register size */
101#define NTP_SHIFT 8 /* 8 suitable for crystal time base */
102#define NTP_MAXKEY 65535 /* maximum authentication key number */
103#define NTP_MAXSESSION 100 /* maximum entries on session key list */
104#define NTP_AUTOMAX 12 /* log2 default max session key lifetime */
105#define KEY_REVOKE 16 /* log2 default key revoke timeout */
116#define NTP_FWEIGHT .5 /* clock filter weight */
106#define NTP_FWEIGHT .5 /* clock filter weight */
117
107#define NTP_SWEIGHT .75 /* select weight */
108#define CLOCK_SGATE 10. /* popcorn spike gate */
109#define BURST_INTERVAL1 4 /* first interburst interval (log2) */
110#define BURST_INTERVAL2 1 /* succeeding interburst intervals (log2) */
111
118/*
112/*
119 * Selection algorithm tuning parameters
113 * Operations for jitter (variance) calculations (these use doubles).
114 * Note that we carefully separate the jitter component from the dispersion
115 * component (frequency error plus precision). The frequency error
116 * component is computed as CLOCK_PHI times the difference between the epoch
117 * of the time measurement and the reference time. The precision componen
118 * is computed as the square root of the mean of the squares of a zero-
119 * mean, uniform distribution of unit maximum amplitude. Whether this
120 * makes statistical sense may be arguable.
120 */
121 */
121#define NTP_MINCLOCK 3 /* min survivors */
122#define NTP_MAXCLOCK 10 /* max candidates */
123#define MINDISPERSE .001 /* min distance */
124#define MAXDISTANCE 1.5 /* max root distance (select threshold) */
125#define CLOCK_SGATE 3. /* popcorn spike gate */
126#define HUFFPUFF 900 /* huff-n'-puff sample interval (s) */
127#define MAXHOP 2 /* anti-clockhop threshold */
128#define MAX_TTL 8 /* max ttl mapping vector size */
129#define BEACON 7200 /* manycast beacon interval */
130#define NTP_MAXEXTEN 2048 /* max extension field size */
131#define NTP_ORPHWAIT 300 /* orphan wair (s) */
132
133/*
134 * Miscellaneous stuff
135 */
136#define NTP_MAXKEY 65535 /* max authentication key number */
137#define KEY_TYPE_MD5 NID_md5 /* MD5 digest NID */
138/*
139 * Limits of things
140 */
141#define MAXFILENAME 256 /* max length of file name */
142#define MAXHOSTNAME 512 /* max length of host/node name */
143#define NTP_MAXSTRLEN 256 /* max string length */
144
145/*
146 * Operations for jitter calculations (these use doubles).
147 *
148 * Note that we carefully separate the jitter component from the
149 * dispersion component (frequency error plus precision). The frequency
150 * error component is computed as CLOCK_PHI times the difference between
151 * the epoch of the time measurement and the reference time. The
152 * precision component is computed as the square root of the mean of the
153 * squares of a zero-mean, uniform distribution of unit maximum
154 * amplitude. Whether this makes statistical sense may be arguable.
155 */
156#define SQUARE(x) ((x) * (x))
157#define SQRT(x) (sqrt(x))
158#define DIFF(x, y) (SQUARE((x) - (y)))
122#define SQUARE(x) ((x) * (x))
123#define SQRT(x) (sqrt(x))
124#define DIFF(x, y) (SQUARE((x) - (y)))
159#define LOGTOD(a) ldexp(1., (int)(a)) /* log2 to double */
125#define LOGTOD(a) ((a) < 0 ? 1. / (1L << -(a)) : \
126 1L << (int)(a)) /* log2 to double */
160#define UNIVAR(x) (SQUARE(.28867513 * LOGTOD(x))) /* std uniform distr */
127#define UNIVAR(x) (SQUARE(.28867513 * LOGTOD(x))) /* std uniform distr */
161#define ULOGTOD(a) ldexp(1., (int)(a)) /* ulog2 to double */
128#define ULOGTOD(a) (1L << (int)(a)) /* ulog2 to double */
129#define MAXDISPERSE 16. /* max dispersion (square) */
130#define MINDISPERSE .01 /* min dispersion */
131#define MAXDISTANCE 1. /* max root distance */
162
132
163#define EVENT_TIMEOUT 0 /* one second, that is */
133/*
134 * Loop filter parameters. See section 5.1 of the specification.
135 *
136 * Note that these are appropriate for a crystal time base. If your
137 * system clock is line frequency controlled you should read the
138 * specification for appropriate modifications.
139 */
140#define CLOCK_PHI 15e-6 /* max frequency wander */
164
141
142#define EVENT_TIMEOUT 0 /* one second, that is */
165
166/*
167 * The interface structure is used to hold the addresses and socket
143
144/*
145 * The interface structure is used to hold the addresses and socket
168 * numbers of each of the local network addresses we are using.
169 * Because "interface" is a reserved word in C++ and has so many
170 * varied meanings, a change to "endpt" (via typedef) is under way.
171 * Eventually the struct tag will change from interface to endpt_tag.
172 * endpt is unrelated to the select algorithm's struct endpoint.
146 * numbers of each of the interfaces we are using.
173 */
147 */
174typedef struct interface endpt;
175struct interface {
148struct interface {
176 endpt * elink; /* endpt list link */
177 endpt * mclink; /* per-AF_* multicast list */
178 void * ioreg_ctx; /* IO registration context */
179 SOCKET fd; /* socket descriptor */
180 SOCKET bfd; /* for receiving broadcasts */
181 u_int32 ifnum; /* endpt instance count */
182 sockaddr_u sin; /* unicast address */
183 sockaddr_u mask; /* subnet mask */
184 sockaddr_u bcast; /* broadcast address */
185 char name[32]; /* name of interface */
186 u_short family; /* AF_INET/AF_INET6 */
187 u_short phase; /* phase in update cycle */
188 u_int32 flags; /* interface flags */
189 int last_ttl; /* last TTL specified */
190 u_int32 addr_refid; /* IPv4 addr or IPv6 hash */
191 int num_mcast; /* mcast addrs enabled */
192 u_long starttime; /* current_time at creation */
193 volatile long received; /* number of incoming packets */
194 long sent; /* number of outgoing packets */
195 long notsent; /* number of send failures */
196 u_int ifindex; /* for IPV6_MULTICAST_IF */
197 isc_boolean_t ignore_packets; /* listen-read-drop this? */
198 struct peer * peers; /* list of peers using endpt */
199 u_int peercnt; /* count of same */
149 int fd; /* socket this is opened on */
150 int bfd; /* socket for receiving broadcasts */
151 struct sockaddr_in sin; /* interface address */
152 struct sockaddr_in bcast; /* broadcast address */
153 struct sockaddr_in mask; /* interface mask */
154 char name[8]; /* name of interface */
155 int flags; /* interface flags */
156 int last_ttl; /* last TTL specified */
157 volatile long received; /* number of incoming packets */
158 long sent; /* number of outgoing packets */
159 long notsent; /* number of send failures */
200};
201
202/*
203 * Flags for interfaces
204 */
160};
161
162/*
163 * Flags for interfaces
164 */
205#define INT_UP 0x001 /* Interface is up */
206#define INT_PPP 0x002 /* Point-to-point interface */
207#define INT_LOOPBACK 0x004 /* the loopback interface */
208#define INT_BROADCAST 0x008 /* can broadcast out this interface */
209#define INT_MULTICAST 0x010 /* can multicast out this interface */
210#define INT_BCASTOPEN 0x020 /* broadcast receive socket is open */
211#define INT_MCASTOPEN 0x040 /* multicasting enabled */
212#define INT_WILDCARD 0x080 /* wildcard interface - usually skipped */
213#define INT_MCASTIF 0x100 /* bound directly to MCAST address */
214#define INT_PRIVACY 0x200 /* RFC 4941 IPv6 privacy address */
215#define INT_BCASTXMIT 0x400 /* socket setup to allow broadcasts */
165#define INT_BROADCAST 1 /* can broadcast out this interface */
166#define INT_BCASTOPEN 2 /* broadcast socket is open */
167#define INT_LOOPBACK 4 /* the loopback interface */
168#define INT_MULTICAST 8 /* multicasting enabled */
216
217/*
169
170/*
218 * Define flasher bits (tests 1 through 11 in packet procedure)
171 * Define flasher bits (tests 1 through 8 in packet procedure)
219 * These reveal the state at the last grumble from the peer and are
220 * most handy for diagnosing problems, even if not strictly a state
221 * variable in the spec. These are recorded in the peer structure.
172 * These reveal the state at the last grumble from the peer and are
173 * most handy for diagnosing problems, even if not strictly a state
174 * variable in the spec. These are recorded in the peer structure.
222 *
223 * Packet errors
224 */
175 */
225#define TEST1 0X0001 /* duplicate packet */
226#define TEST2 0x0002 /* bogus packet */
176#define TEST1 0x0001 /* duplicate packet received */
177#define TEST2 0x0002 /* bogus packet received */
227#define TEST3 0x0004 /* protocol unsynchronized */
178#define TEST3 0x0004 /* protocol unsynchronized */
228#define TEST4 0x0008 /* access denied */
229#define TEST5 0x0010 /* bad authentication */
230#define TEST6 0x0020 /* bad synch or stratum */
231#define TEST7 0x0040 /* bad header */
232#define TEST8 0x0080 /* bad autokey */
233#define TEST9 0x0100 /* bad crypto */
234#define PKT_TEST_MASK (TEST1 | TEST2 | TEST3 | TEST4 | TEST5 |\
235 TEST6 | TEST7 | TEST8 | TEST9)
236/*
237 * Peer errors
238 */
239#define TEST10 0x0200 /* peer bad synch or stratum */
240#define TEST11 0x0400 /* peer distance exceeded */
241#define TEST12 0x0800 /* peer synchronization loop */
242#define TEST13 0x1000 /* peer unreacable */
243#define PEER_TEST_MASK (TEST10 | TEST11 | TEST12 | TEST13)
179#define TEST4 0x0008 /* peer delay/dispersion bounds check */
180#define TEST5 0x0010 /* peer authentication failed */
181#define TEST6 0x0020 /* peer clock unsynchronized */
182#define TEST7 0x0040 /* peer stratum out of bounds */
183#define TEST8 0x0080 /* root delay/dispersion bounds check */
184#define TEST9 0x0100 /* peer not authenticated */
185#define TEST10 0x0200 /* access denied */
244
245/*
186
187/*
246 * Unused flags
247 */
248#define TEST14 0x2000
249#define TEST15 0x4000
250#define TEST16 0x8000
251
252/*
253 * The peer structure. Holds state information relating to the guys
254 * we are peering with. Most of this stuff is from section 3.2 of the
188 * The peer structure. Holds state information relating to the guys
189 * we are peering with. Most of this stuff is from section 3.2 of the
255 * spec.
256 */
257struct peer {
190 * spec.
191 */
192struct peer {
258 struct peer *p_link; /* link pointer in free & peer lists */
259 struct peer *adr_link; /* link pointer in address hash */
260 struct peer *aid_link; /* link pointer in associd hash */
261 struct peer *ilink; /* list of peers for interface */
262 sockaddr_u srcadr; /* address of remote host */
263 char * hostname; /* if non-NULL, remote name */
264 struct addrinfo *addrs; /* hostname query result */
265 struct addrinfo *ai; /* position within addrs */
266 endpt * dstadr; /* local address */
267 associd_t associd; /* association ID */
268 u_char version; /* version number */
269 u_char hmode; /* local association mode */
270 u_char hpoll; /* local poll interval */
271 u_char minpoll; /* min poll interval */
272 u_char maxpoll; /* max poll interval */
273 u_int flags; /* association flags */
274 u_char cast_flags; /* additional flags */
275 u_char last_event; /* last peer error code */
276 u_char num_events; /* number of error events */
277 u_int32 ttl; /* ttl/refclock mode */
278 char *ident; /* group identifier name */
193 struct peer *next;
194 struct peer *ass_next; /* link pointer in associd hash */
195 struct sockaddr_in srcadr; /* address of remote host */
196 struct interface *dstadr; /* pointer to address on local host */
197 struct refclockproc *procptr; /* pointer to reference clock stuff */
198 u_char leap; /* leap indicator */
199 u_char hmode; /* association mode with this peer */
200 u_char pmode; /* peer's association mode */
201 u_char stratum; /* stratum of remote peer */
202 s_char precision; /* peer's clock precision */
203 u_char ppoll; /* peer poll interval */
204 u_char hpoll; /* local host poll interval */
205 u_char minpoll; /* min local host poll interval */
206 u_char maxpoll; /* max local host poll interval */
207 u_char burst; /* packets remaining in burst */
208 u_char version; /* version number */
209 u_int flags; /* peer flags */
210 u_char cast_flags; /* flags MDF_?CAST */
211 u_int flash; /* protocol error tally bits */
212 u_char refclktype; /* reference clock type */
213 u_char refclkunit; /* reference clock unit number */
214 u_char sstclktype; /* clock type for system status word */
215 u_int32 refid; /* peer reference ID */
216 l_fp reftime; /* update epoch */
217 u_long keyid; /* current key ID */
218 u_long pkeyid; /* previous key ID (autokey) */
219 u_long *keylist; /* session key identifier list */
220 int keynumber; /* session key identifier number */
221 u_short associd; /* association ID, a unique integer */
222 u_char ttl; /* time to live (multicast) */
279
223
280 /*
281 * Variables used by reference clock support
282 */
283#ifdef REFCLOCK
284 struct refclockproc *procptr; /* refclock structure pointer */
285 u_char refclktype; /* reference clock type */
286 u_char refclkunit; /* reference clock unit number */
287 u_char sstclktype; /* clock type for system status word */
288#endif /* REFCLOCK */
224/* **Start of clear-to-zero area.*** */
225/* Everything that is cleared to zero goes below here */
226 u_char valid; /* valid counter */
227#define clear_to_zero valid
228 double estbdelay; /* broadcast offset */
229 u_char status; /* peer status */
230 u_char pollsw; /* what it says */
231 u_char reach; /* reachability, NTP_WINDOW bits */
232 u_char unreach; /* unreachable count */
233 u_short filter_nextpt; /* index into filter shift register */
234 double filter_delay[NTP_SHIFT]; /* delay part of shift register */
235 double filter_offset[NTP_SHIFT]; /* offset part of shift register */
236 double filter_disp[NTP_SHIFT]; /* dispersion part of shift register */
237 u_long filter_epoch[NTP_SHIFT]; /* epoch part of shift register */
238 u_char filter_order[NTP_SHIFT]; /* we keep the filter sorted here */
239 l_fp org; /* originate time stamp */
240 l_fp rec; /* receive time stamp */
241 l_fp xmt; /* transmit time stamp */
242 double offset; /* peer clock offset */
243 double delay; /* peer roundtrip delay */
244 double variance; /* peer variance (jitter) */
245 double disp; /* peer dispersion */
246 double rootdelay; /* roundtrip delay to primary clock */
247 double rootdispersion; /* dispersion to primary clock */
248 u_long epoch; /* reference epoch */
289
249
290 /*
291 * Variables set by received packet
292 */
293 u_char leap; /* local leap indicator */
294 u_char pmode; /* remote association mode */
295 u_char stratum; /* remote stratum */
296 u_char ppoll; /* remote poll interval */
297 s_char precision; /* remote clock precision */
298 double rootdelay; /* roundtrip delay to primary source */
299 double rootdisp; /* dispersion to primary source */
300 u_int32 refid; /* remote reference ID */
301 l_fp reftime; /* update epoch */
302
303 /*
304 * Variables used by authenticated client
305 */
306 keyid_t keyid; /* current key ID */
307#ifdef AUTOKEY
308#define clear_to_zero opcode
309 u_int32 opcode; /* last request opcode */
310 associd_t assoc; /* peer association ID */
311 u_int32 crypto; /* peer status word */
312 EVP_PKEY *pkey; /* public key */
313 const EVP_MD *digest; /* message digest algorithm */
314 char *subject; /* certificate subject name */
315 char *issuer; /* certificate issuer name */
316 struct cert_info *xinfo; /* issuer certificate */
317 keyid_t pkeyid; /* previous key ID */
318 keyid_t hcookie; /* host cookie */
319 keyid_t pcookie; /* peer cookie */
320 const struct pkey_info *ident_pkey; /* identity key */
321 BIGNUM *iffval; /* identity challenge (IFF, GQ, MV) */
322 const BIGNUM *grpkey; /* identity challenge key (GQ) */
323 struct value cookval; /* receive cookie values */
324 struct value recval; /* receive autokey values */
325 struct exten *cmmd; /* extension pointer */
326 u_long refresh; /* next refresh epoch */
327
328 /*
329 * Variables used by authenticated server
330 */
331 keyid_t *keylist; /* session key ID list */
332 int keynumber; /* current key number */
333 struct value encrypt; /* send encrypt values */
334 struct value sndval; /* send autokey values */
335#else /* !AUTOKEY follows */
336#define clear_to_zero status
337#endif /* !AUTOKEY */
338
339 /*
340 * Ephemeral state variables
341 */
342 u_char status; /* peer status */
343 u_char new_status; /* under-construction status */
344 u_char reach; /* reachability register */
345 int flash; /* protocol error test tally bits */
346 u_long epoch; /* reference epoch */
347 int burst; /* packets remaining in burst */
348 int retry; /* retry counter */
349 int flip; /* interleave mode control */
350 int filter_nextpt; /* index into filter shift register */
351 double filter_delay[NTP_SHIFT]; /* delay shift register */
352 double filter_offset[NTP_SHIFT]; /* offset shift register */
353 double filter_disp[NTP_SHIFT]; /* dispersion shift register */
354 u_long filter_epoch[NTP_SHIFT]; /* epoch shift register */
355 u_char filter_order[NTP_SHIFT]; /* filter sort index */
356 l_fp rec; /* receive time stamp */
357 l_fp xmt; /* transmit time stamp */
358 l_fp dst; /* destination timestamp */
359 l_fp aorg; /* origin timestamp */
360 l_fp borg; /* alternate origin timestamp */
361 l_fp bxmt; /* most recent broadcast transmit timestamp */
362 double offset; /* peer clock offset */
363 double delay; /* peer roundtrip delay */
364 double jitter; /* peer jitter (squares) */
365 double disp; /* peer dispersion */
366 double xleave; /* interleave delay */
367 double bias; /* programmed offset bias */
368
369 /*
370 * Variables used to correct for packet length and asymmetry.
371 */
372 double t21; /* outbound packet delay */
373 int t21_bytes; /* outbound packet length */
374 int t21_last; /* last outbound packet length */
375 double r21; /* outbound data rate */
376 double t34; /* inbound packet delay */
377 int t34_bytes; /* inbound packet length */
378 double r34; /* inbound data rate */
379
380 /*
381 * End of clear-to-zero area
382 */
383 u_long update; /* receive epoch */
250/* ***End of clear-to-zero area.*** */
251/* Everything that is cleared to zero goes above here */
252 u_long update; /* receive epoch */
384#define end_clear_to_zero update
253#define end_clear_to_zero update
385 int unreach; /* watchdog counter */
386 int throttle; /* rate control */
387 u_long outdate; /* send time last packet */
388 u_long nextdate; /* send time next packet */
389
254 u_long outdate; /* send time last packet */
255 u_long nextdate; /* send time next packet */
256 u_long nextaction; /* peer local activity timeout (refclocks mainly) */
257 void (*action) P((struct peer *));/* action timeout function */
390 /*
258 /*
391 * Statistic counters
259 * statistic counters
392 */
260 */
393 u_long timereset; /* time stat counters were reset */
394 u_long timelastrec; /* last packet received time */
395 u_long timereceived; /* last (clean) packet received time */
396 u_long timereachable; /* last reachable/unreachable time */
397
398 u_long sent; /* packets sent */
399 u_long received; /* packets received */
400 u_long processed; /* packets processed */
401 u_long badauth; /* bad authentication (TEST5) */
402 u_long badNAK; /* invalid crypto-NAK */
403 u_long bogusorg; /* bogus origin (TEST2, TEST3) */
404 u_long oldpkt; /* old duplicate (TEST1) */
405 u_long seldisptoolarge; /* bad header (TEST6, TEST7) */
406 u_long selbroken; /* KoD received */
261 u_long timereset; /* time stat counters were reset */
262 u_long sent; /* number of updates sent */
263 u_long received; /* number of frames received */
264 u_long timereceived; /* last time a frame received */
265 u_long timereachable; /* last reachable/unreachable event */
266 u_long processed; /* processed by the protocol */
267 u_long badauth; /* bad credentials detected */
268 u_long bogusorg; /* rejected due to bogus origin */
269 u_long oldpkt; /* rejected as duplicate packet */
270 u_long seldisptoolarge; /* too much dispersion for selection */
271 u_long selbroken; /* broken NTP detected in selection */
272 u_long seltooold; /* too long since sync in selection */
273 u_char last_event; /* set to code for last peer error */
274 u_char num_events; /* num. of events which have occurred */
407};
408
409/*
410 * Values for peer.leap, sys_leap
411 */
412#define LEAP_NOWARNING 0x0 /* normal, no leap second warning */
413#define LEAP_ADDSECOND 0x1 /* last minute of day has 61 seconds */
414#define LEAP_DELSECOND 0x2 /* last minute of day has 59 seconds */
415#define LEAP_NOTINSYNC 0x3 /* overload, clock is free running */
416
417/*
275};
276
277/*
278 * Values for peer.leap, sys_leap
279 */
280#define LEAP_NOWARNING 0x0 /* normal, no leap second warning */
281#define LEAP_ADDSECOND 0x1 /* last minute of day has 61 seconds */
282#define LEAP_DELSECOND 0x2 /* last minute of day has 59 seconds */
283#define LEAP_NOTINSYNC 0x3 /* overload, clock is free running */
284
285/*
418 * Values for peer mode and packet mode. Only the modes through
419 * MODE_BROADCAST and MODE_BCLIENT appear in the transition
420 * function. MODE_CONTROL and MODE_PRIVATE can appear in packets,
421 * but those never survive to the transition function.
422 * is a
423/ */
424#define MODE_UNSPEC 0 /* unspecified (old version) */
425#define MODE_ACTIVE 1 /* symmetric active mode */
426#define MODE_PASSIVE 2 /* symmetric passive mode */
286 * Values for peer.mode
287 */
288#define MODE_UNSPEC 0 /* unspecified (probably old NTP version) */
289#define MODE_ACTIVE 1 /* symmetric active */
290#define MODE_PASSIVE 2 /* symmetric passive */
427#define MODE_CLIENT 3 /* client mode */
428#define MODE_SERVER 4 /* server mode */
429#define MODE_BROADCAST 5 /* broadcast mode */
291#define MODE_CLIENT 3 /* client mode */
292#define MODE_SERVER 4 /* server mode */
293#define MODE_BROADCAST 5 /* broadcast mode */
430/*
431 * These can appear in packets
432 */
433#define MODE_CONTROL 6 /* control mode */
434#define MODE_PRIVATE 7 /* private mode */
435/*
436 * This is a madeup mode for broadcast client.
437 */
438#define MODE_BCLIENT 6 /* broadcast client mode */
294#define MODE_CONTROL 6 /* control mode packet */
295#define MODE_PRIVATE 7 /* implementation defined function */
439
296
297#define MODE_BCLIENT 8 /* a pseudo mode, used internally */
298#define MODE_MCLIENT 9 /* multicast mode, used internally */
299
440/*
441 * Values for peer.stratum, sys_stratum
442 */
300/*
301 * Values for peer.stratum, sys_stratum
302 */
443#define STRATUM_REFCLOCK ((u_char)0) /* default stratum */
303#define STRATUM_REFCLOCK ((u_char)0) /* stratum claimed by primary clock */
304#define STRATUM_PRIMARY ((u_char)1) /* host has a primary clock */
305#define STRATUM_INFIN ((u_char)NTP_MAXSTRATUM) /* infinity a la Bellman-Ford */
444/* A stratum of 0 in the packet is mapped to 16 internally */
445#define STRATUM_PKT_UNSPEC ((u_char)0) /* unspecified in packet */
306/* A stratum of 0 in the packet is mapped to 16 internally */
307#define STRATUM_PKT_UNSPEC ((u_char)0) /* unspecified in packet */
446#define STRATUM_UNSPEC ((u_char)16) /* unspecified */
308#define STRATUM_UNSPEC ((u_char)(NTP_MAXSTRATUM+(u_char)1)) /* unspecified */
447
448/*
309
310/*
449 * Values for peer.flags (u_int)
311 * Values for peer.flags
450 */
312 */
451#define FLAG_CONFIG 0x0001 /* association was configured */
452#define FLAG_PREEMPT 0x0002 /* preemptable association */
453#define FLAG_AUTHENTIC 0x0004 /* last message was authentic */
454#define FLAG_REFCLOCK 0x0008 /* this is actually a reference clock */
455#define FLAG_BC_VOL 0x0010 /* broadcast client volleying */
456#define FLAG_PREFER 0x0020 /* prefer peer */
457#define FLAG_BURST 0x0040 /* burst mode */
458#define FLAG_PPS 0x0080 /* steered by PPS */
459#define FLAG_IBURST 0x0100 /* initial burst mode */
460#define FLAG_NOSELECT 0x0200 /* never select */
461#define FLAG_TRUE 0x0400 /* force truechimer */
462#define FLAG_SKEY 0x0800 /* autokey authentication */
463#define FLAG_XLEAVE 0x1000 /* interleaved protocol */
464#define FLAG_XB 0x2000 /* interleaved broadcast */
465#define FLAG_XBOGUS 0x4000 /* interleaved bogus packet */
466#ifdef OPENSSL
467# define FLAG_ASSOC 0x8000 /* autokey request */
468#endif /* OPENSSL */
469#define FLAG_TSTAMP_PPS 0x10000 /* PPS source provides absolute timestamp */
313#define FLAG_CONFIG 0x1 /* association was configured */
314#define FLAG_AUTHENABLE 0x2 /* this guy needs authentication */
315#define FLAG_MCAST1 0x4 /* multicast client/server mode */
316#define FLAG_MCAST2 0x8 /* multicast client mode */
317#define FLAG_AUTHENTIC 0x10 /* last message was authentic */
318#define FLAG_REFCLOCK 0x20 /* this is actually a reference clock */
319#define FLAG_SYSPEER 0x40 /* this is one of the selected peers */
320#define FLAG_PREFER 0x80 /* this is the preferred peer */
321#define FLAG_BURST 0x100 /* burst mode */
322#define FLAG_SKEY 0x200 /* autokey authentication */
323#define FLAG_NOSELECT 0x400 /* this is a "noselect" peer */
470
471/*
472 * Definitions for the clear() routine. We use memset() to clear
473 * the parts of the peer structure which go to zero. These are
474 * used to calculate the start address and length of the area.
475 */
476#define CLEAR_TO_ZERO(p) ((char *)&((p)->clear_to_zero))
477#define END_CLEAR_TO_ZERO(p) ((char *)&((p)->end_clear_to_zero))
324
325/*
326 * Definitions for the clear() routine. We use memset() to clear
327 * the parts of the peer structure which go to zero. These are
328 * used to calculate the start address and length of the area.
329 */
330#define CLEAR_TO_ZERO(p) ((char *)&((p)->clear_to_zero))
331#define END_CLEAR_TO_ZERO(p) ((char *)&((p)->end_clear_to_zero))
478#define LEN_CLEAR_TO_ZERO(p) (END_CLEAR_TO_ZERO(p) - CLEAR_TO_ZERO(p))
479#define CRYPTO_TO_ZERO(p) ((char *)&((p)->clear_to_zero))
480#define END_CRYPTO_TO_ZERO(p) ((char *)&((p)->end_clear_to_zero))
481#define LEN_CRYPTO_TO_ZERO (END_CRYPTO_TO_ZERO((struct peer *)0) \
482 - CRYPTO_TO_ZERO((struct peer *)0))
332#define LEN_CLEAR_TO_ZERO (END_CLEAR_TO_ZERO((struct peer *)0) \
333 - CLEAR_TO_ZERO((struct peer *)0))
334/*
335 * Reference clock identifiers (for pps signal)
336 */
337#define PPSREFID (u_int32)"PPS " /* used when pps controls stratum>1 */
483
484/*
485 * Reference clock types. Added as necessary.
486 */
487#define REFCLK_NONE 0 /* unknown or missing */
488#define REFCLK_LOCALCLOCK 1 /* external (e.g., lockclock) */
489#define REFCLK_GPS_TRAK 2 /* TRAK 8810 GPS Receiver */
490#define REFCLK_WWV_PST 3 /* PST/Traconex 1020 WWV/H */
338
339/*
340 * Reference clock types. Added as necessary.
341 */
342#define REFCLK_NONE 0 /* unknown or missing */
343#define REFCLK_LOCALCLOCK 1 /* external (e.g., lockclock) */
344#define REFCLK_GPS_TRAK 2 /* TRAK 8810 GPS Receiver */
345#define REFCLK_WWV_PST 3 /* PST/Traconex 1020 WWV/H */
491#define REFCLK_SPECTRACOM 4 /* Spectracom (generic) Receivers */
346#define REFCLK_WWVB_SPECTRACOM 4 /* Spectracom 8170/Netclock WWVB */
492#define REFCLK_TRUETIME 5 /* TrueTime (generic) Receivers */
347#define REFCLK_TRUETIME 5 /* TrueTime (generic) Receivers */
493#define REFCLK_IRIG_AUDIO 6 /* IRIG-B/W audio decoder */
494#define REFCLK_CHU_AUDIO 7 /* CHU audio demodulator/decoder */
348#define REFCLK_IRIG_AUDIO 6 /* IRIG-B audio decoder */
349#define REFCLK_CHU 7 /* scratchbuilt CHU (Canada) */
495#define REFCLK_PARSE 8 /* generic driver (usually DCF77,GPS,MSF) */
496#define REFCLK_GPS_MX4200 9 /* Magnavox MX4200 GPS */
497#define REFCLK_GPS_AS2201 10 /* Austron 2201A GPS */
498#define REFCLK_GPS_ARBITER 11 /* Arbiter 1088A/B/ GPS */
499#define REFCLK_IRIG_TPRO 12 /* KSI/Odetics TPRO-S IRIG */
500#define REFCLK_ATOM_LEITCH 13 /* Leitch CSD 5300 Master Clock */
501#define REFCLK_MSF_EES 14 /* EES M201 MSF Receiver */
502#define REFCLK_GPSTM_TRUE 15 /* OLD TrueTime GPS/TM-TMD Receiver */
503#define REFCLK_IRIG_BANCOMM 16 /* Bancomm GPS/IRIG Interface */
504#define REFCLK_GPS_DATUM 17 /* Datum Programmable Time System */
350#define REFCLK_PARSE 8 /* generic driver (usually DCF77,GPS,MSF) */
351#define REFCLK_GPS_MX4200 9 /* Magnavox MX4200 GPS */
352#define REFCLK_GPS_AS2201 10 /* Austron 2201A GPS */
353#define REFCLK_GPS_ARBITER 11 /* Arbiter 1088A/B/ GPS */
354#define REFCLK_IRIG_TPRO 12 /* KSI/Odetics TPRO-S IRIG */
355#define REFCLK_ATOM_LEITCH 13 /* Leitch CSD 5300 Master Clock */
356#define REFCLK_MSF_EES 14 /* EES M201 MSF Receiver */
357#define REFCLK_GPSTM_TRUE 15 /* OLD TrueTime GPS/TM-TMD Receiver */
358#define REFCLK_IRIG_BANCOMM 16 /* Bancomm GPS/IRIG Interface */
359#define REFCLK_GPS_DATUM 17 /* Datum Programmable Time System */
505#define REFCLK_ACTS 18 /* Generic Auto Computer Time Service */
360#define REFCLK_NIST_ACTS 18 /* NIST Auto Computer Time Service */
506#define REFCLK_WWV_HEATH 19 /* Heath GC1000 WWV/WWVH Receiver */
507#define REFCLK_GPS_NMEA 20 /* NMEA based GPS clock */
508#define REFCLK_GPS_VME 21 /* TrueTime GPS-VME Interface */
509#define REFCLK_ATOM_PPS 22 /* 1-PPS Clock Discipline */
361#define REFCLK_WWV_HEATH 19 /* Heath GC1000 WWV/WWVH Receiver */
362#define REFCLK_GPS_NMEA 20 /* NMEA based GPS clock */
363#define REFCLK_GPS_VME 21 /* TrueTime GPS-VME Interface */
364#define REFCLK_ATOM_PPS 22 /* 1-PPS Clock Discipline */
510#define REFCLK_PTB_ACTS 23 /* replaced by REFCLK_ACTS */
511#define REFCLK_USNO 24 /* replaced by REFCLK_ACTS */
365#define REFCLK_PTB_ACTS 23 /* PTB Auto Computer Time Service */
366#define REFCLK_USNO 24 /* Naval Observatory dialup */
512#define REFCLK_GPS_HP 26 /* HP 58503A Time/Frequency Receiver */
367#define REFCLK_GPS_HP 26 /* HP 58503A Time/Frequency Receiver */
513#define REFCLK_ARCRON_MSF 27 /* ARCRON MSF radio clock. */
368#define REFCLK_ARCRON_MSF 27 /* ARCRON MSF radio clock. */
514#define REFCLK_SHM 28 /* clock attached thru shared memory */
515#define REFCLK_PALISADE 29 /* Trimble Navigation Palisade GPS */
516#define REFCLK_ONCORE 30 /* Motorola UT Oncore GPS */
517#define REFCLK_GPS_JUPITER 31 /* Rockwell Jupiter GPS receiver */
369#define REFCLK_SHM 28 /* clock attached thru shared memory */
370#define REFCLK_PALISADE 29 /* Trimble Navigation Palisade GPS */
371#define REFCLK_ONCORE 30 /* Motorola UT Oncore GPS */
372#define REFCLK_GPS_JUPITER 31 /* Rockwell Jupiter GPS receiver */
518#define REFCLK_CHRONOLOG 32 /* Chrono-log K WWVB receiver */
519#define REFCLK_DUMBCLOCK 33 /* Dumb localtime clock */
520#define REFCLK_ULINK 34 /* Ultralink M320 WWVB receiver */
521#define REFCLK_PCF 35 /* Conrad parallel port radio clock */
522#define REFCLK_WWV_AUDIO 36 /* WWV/H audio demodulator/decoder */
523#define REFCLK_FG 37 /* Forum Graphic GPS */
524#define REFCLK_HOPF_SERIAL 38 /* hopf DCF77/GPS serial receiver */
525#define REFCLK_HOPF_PCI 39 /* hopf DCF77/GPS PCI receiver */
526#define REFCLK_JJY 40 /* JJY receiver */
527#define REFCLK_TT560 41 /* TrueTime 560 IRIG-B decoder */
528#define REFCLK_ZYFER 42 /* Zyfer GPStarplus receiver */
529#define REFCLK_RIPENCC 43 /* RIPE NCC Trimble driver */
530#define REFCLK_NEOCLOCK4X 44 /* NeoClock4X DCF77 or TDF receiver */
531#define REFCLK_TSYNCPCI 45 /* Spectracom TSYNC PCI timing board */
532#define REFCLK_GPSDJSON 46
533#define REFCLK_MAX 46
373#define REFCLK_CHRONOLOG 32 /* Chrono-log K WWVB receiver */
374#define REFCLK_DUMBCLOCK 33 /* Dumb localtime clock */
375#define REFCLK_ULINK 34 /* Ultralink M320 WWVB receiver */
376#define REFCLK_MAX 34 /* Grow as needed... */
534
377
378/*
379 * We tell reference clocks from real peers by giving the reference
380 * clocks an address of the form 127.127.t.u, where t is the type and
381 * u is the unit number. We define some of this here since we will need
382 * some sanity checks to make sure this address isn't interpretted as
383 * that of a normal peer.
384 */
385#define REFCLOCK_ADDR 0x7f7f0000 /* 127.127.0.0 */
386#define REFCLOCK_MASK 0xffff0000 /* 255.255.0.0 */
535
387
388#define ISREFCLOCKADR(srcadr) ((SRCADR(srcadr) & REFCLOCK_MASK) \
389 == REFCLOCK_ADDR)
390
536/*
391/*
392 * Macro for checking for invalid addresses. This is really, really
393 * gross, but is needed so no one configures a host on net 127 now that
394 * we're encouraging it the the configuration file.
395 */
396#define LOOPBACKADR 0x7f000001
397#define LOOPNETMASK 0xff000000
398
399#define ISBADADR(srcadr) (((SRCADR(srcadr) & LOOPNETMASK) \
400 == (LOOPBACKADR & LOOPNETMASK)) \
401 && (SRCADR(srcadr) != LOOPBACKADR))
402
403/*
404 * Utilities for manipulating addresses and port numbers
405 */
406#define NSRCADR(src) ((src)->sin_addr.s_addr) /* address in net byte order */
407#define NSRCPORT(src) ((src)->sin_port) /* port in net byte order */
408#define SRCADR(src) (ntohl(NSRCADR((src)))) /* address in host byte order */
409#define SRCPORT(src) (ntohs(NSRCPORT((src)))) /* host port */
410
411/*
537 * NTP packet format. The mac field is optional. It isn't really
538 * an l_fp either, but for now declaring it that way is convenient.
539 * See Appendix A in the specification.
540 *
541 * Note that all u_fp and l_fp values arrive in network byte order
542 * and must be converted (except the mac, which isn't, really).
543 */
544struct pkt {
412 * NTP packet format. The mac field is optional. It isn't really
413 * an l_fp either, but for now declaring it that way is convenient.
414 * See Appendix A in the specification.
415 *
416 * Note that all u_fp and l_fp values arrive in network byte order
417 * and must be converted (except the mac, which isn't, really).
418 */
419struct pkt {
545 u_char li_vn_mode; /* peer leap indicator */
546 u_char stratum; /* peer stratum */
547 u_char ppoll; /* peer poll interval */
548 s_char precision; /* peer clock precision */
549 u_fp rootdelay; /* roundtrip delay to primary source */
550 u_fp rootdisp; /* dispersion to primary source*/
551 u_int32 refid; /* reference id */
552 l_fp reftime; /* last update time */
553 l_fp org; /* originate time stamp */
554 l_fp rec; /* receive time stamp */
555 l_fp xmt; /* transmit time stamp */
420 u_char li_vn_mode; /* contains leap indicator, version and mode */
421 u_char stratum; /* peer's stratum */
422 u_char ppoll; /* the peer polling interval */
423 s_char precision; /* peer clock precision */
424 u_fp rootdelay; /* distance to primary clock */
425 u_fp rootdispersion; /* clock dispersion */
426 u_int32 refid; /* reference clock ID */
427 l_fp reftime; /* time peer clock was last updated */
428 l_fp org; /* originate time stamp */
429 l_fp rec; /* receive time stamp */
430 l_fp xmt; /* transmit time stamp */
556
431
557#define MIN_V4_PKT_LEN (12 * sizeof(u_int32)) /* min header length */
558#define LEN_PKT_NOMAC (12 * sizeof(u_int32)) /* min header length */
559#define MIN_MAC_LEN (1 * sizeof(u_int32)) /* crypto_NAK */
560#define MAX_MD5_LEN (5 * sizeof(u_int32)) /* MD5 */
561#define MAX_MAC_LEN (6 * sizeof(u_int32)) /* SHA */
432#define MIN_MAC_LEN (sizeof(u_int32) + 8) /* DES */
433#define MAX_MAC_LEN (sizeof(u_int32) + 16) /* MD5 */
562
563 /*
564 * The length of the packet less MAC must be a multiple of 64
434
435 /*
436 * The length of the packet less MAC must be a multiple of 64
565 * with an RSA modulus and Diffie-Hellman prime of 256 octets
566 * and maximum host name of 128 octets, the maximum autokey
567 * command is 152 octets and maximum autokey response is 460
568 * octets. A packet can contain no more than one command and one
569 * response, so the maximum total extension field length is 864
570 * octets. But, to handle humungus certificates, the bank must
571 * be broke.
572 *
573 * The different definitions of the 'exten' field are here for
574 * the benefit of applications that want to send a packet from
575 * an auto variable in the stack - not using the AUTOKEY version
576 * saves 2KB of stack space. The receive buffer should ALWAYS be
577 * big enough to hold a full extended packet if the extension
578 * fields have to be parsed or skipped.
437 * bits. For normal private-key cryptography, the cryptosum
438 * covers only the raw NTP header. For autokey cryptography,
439 * the heade is incresed by 64 bits to contain the field length
440 * and private value.
579 */
441 */
580#ifdef AUTOKEY
581 u_int32 exten[(NTP_MAXEXTEN + MAX_MAC_LEN) / sizeof(u_int32)];
582#else /* !AUTOKEY follows */
583 u_int32 exten[(MAX_MAC_LEN) / sizeof(u_int32)];
584#endif /* !AUTOKEY */
442 u_int32 keyid1; /* key identifier 1 */
443 u_int32 keyid2; /* key identifier 2 */
444 u_int32 keyid3; /* key identifier 3 */
445 u_char mac[MAX_MAC_LEN]; /* mac */
585};
586
587/*
446};
447
448/*
449 * Packets can come in two flavours, one with a mac and one without.
450 */
451#define LEN_PKT_NOMAC (sizeof(struct pkt) - MAX_MAC_LEN - 3 * sizeof(u_int32))
452
453/*
454 * Minimum size of packet with a MAC: has to include at least a key number.
455 */
456#define LEN_PKT_MAC (LEN_PKT_NOMAC + sizeof(u_int32))
457
458/*
588 * Stuff for extracting things from li_vn_mode
589 */
590#define PKT_MODE(li_vn_mode) ((u_char)((li_vn_mode) & 0x7))
591#define PKT_VERSION(li_vn_mode) ((u_char)(((li_vn_mode) >> 3) & 0x7))
592#define PKT_LEAP(li_vn_mode) ((u_char)(((li_vn_mode) >> 6) & 0x3))
593
594/*
459 * Stuff for extracting things from li_vn_mode
460 */
461#define PKT_MODE(li_vn_mode) ((u_char)((li_vn_mode) & 0x7))
462#define PKT_VERSION(li_vn_mode) ((u_char)(((li_vn_mode) >> 3) & 0x7))
463#define PKT_LEAP(li_vn_mode) ((u_char)(((li_vn_mode) >> 6) & 0x3))
464
465/*
595 * Stuff for putting things back into li_vn_mode in packets and vn_mode
596 * in ntp_monitor.c's mon_entry.
466 * Stuff for putting things back into li_vn_mode
597 */
467 */
598#define VN_MODE(v, m) ((((v) & 7) << 3) | ((m) & 0x7))
599#define PKT_LI_VN_MODE(l, v, m) ((((l) & 3) << 6) | VN_MODE((v), (m)))
468#define PKT_LI_VN_MODE(li, vn, md) \
469 ((u_char)((((li) << 6) & 0xc0) | (((vn) << 3) & 0x38) | ((md) & 0x7)))
600
601
602/*
603 * Dealing with stratum. 0 gets mapped to 16 incoming, and back to 0
604 * on output.
605 */
606#define PKT_TO_STRATUM(s) ((u_char)(((s) == (STRATUM_PKT_UNSPEC)) ?\
607 (STRATUM_UNSPEC) : (s)))
608
609#define STRATUM_TO_PKT(s) ((u_char)(((s) == (STRATUM_UNSPEC)) ?\
610 (STRATUM_PKT_UNSPEC) : (s)))
611
470
471
472/*
473 * Dealing with stratum. 0 gets mapped to 16 incoming, and back to 0
474 * on output.
475 */
476#define PKT_TO_STRATUM(s) ((u_char)(((s) == (STRATUM_PKT_UNSPEC)) ?\
477 (STRATUM_UNSPEC) : (s)))
478
479#define STRATUM_TO_PKT(s) ((u_char)(((s) == (STRATUM_UNSPEC)) ?\
480 (STRATUM_PKT_UNSPEC) : (s)))
481
612/*
613 * Event codes. Used for reporting errors/events to the control module
614 */
615#define PEER_EVENT 0x080 /* this is a peer event */
616#define CRPT_EVENT 0x100 /* this is a crypto event */
617
618/*
482
483/*
619 * System event codes
484 * Event codes. Used for reporting errors/events to the control module
620 */
485 */
621#define EVNT_UNSPEC 0 /* unspecified */
622#define EVNT_NSET 1 /* freq not set */
623#define EVNT_FSET 2 /* freq set */
624#define EVNT_SPIK 3 /* spike detect */
625#define EVNT_FREQ 4 /* freq mode */
626#define EVNT_SYNC 5 /* clock sync */
627#define EVNT_SYSRESTART 6 /* restart */
628#define EVNT_SYSFAULT 7 /* panic stop */
629#define EVNT_NOPEER 8 /* no sys peer */
630#define EVNT_ARMED 9 /* leap armed */
631#define EVNT_DISARMED 10 /* leap disarmed */
632#define EVNT_LEAP 11 /* leap event */
633#define EVNT_CLOCKRESET 12 /* clock step */
634#define EVNT_KERN 13 /* kernel event */
635#define EVNT_TAI 14 /* TAI */
636#define EVNT_LEAPVAL 15 /* stale leapsecond values */
486#define PEER_EVENT 0x80 /* this is a peer event */
637
487
638/*
639 * Peer event codes
640 */
641#define PEVNT_MOBIL (1 | PEER_EVENT) /* mobilize */
642#define PEVNT_DEMOBIL (2 | PEER_EVENT) /* demobilize */
643#define PEVNT_UNREACH (3 | PEER_EVENT) /* unreachable */
644#define PEVNT_REACH (4 | PEER_EVENT) /* reachable */
645#define PEVNT_RESTART (5 | PEER_EVENT) /* restart */
646#define PEVNT_REPLY (6 | PEER_EVENT) /* no reply */
647#define PEVNT_RATE (7 | PEER_EVENT) /* rate exceeded */
648#define PEVNT_DENY (8 | PEER_EVENT) /* access denied */
649#define PEVNT_ARMED (9 | PEER_EVENT) /* leap armed */
650#define PEVNT_NEWPEER (10 | PEER_EVENT) /* sys peer */
651#define PEVNT_CLOCK (11 | PEER_EVENT) /* clock event */
652#define PEVNT_AUTH (12 | PEER_EVENT) /* bad auth */
653#define PEVNT_POPCORN (13 | PEER_EVENT) /* popcorn */
654#define PEVNT_XLEAVE (14 | PEER_EVENT) /* interleave mode */
655#define PEVNT_XERR (15 | PEER_EVENT) /* interleave error */
488#define EVNT_UNSPEC 0
489#define EVNT_SYSRESTART 1
490#define EVNT_SYSFAULT 2
491#define EVNT_SYNCCHG 3
492#define EVNT_PEERSTCHG 4
493#define EVNT_CLOCKRESET 5
494#define EVNT_BADDATETIM 6
495#define EVNT_CLOCKEXCPT 7
656
496
497#define EVNT_PEERIPERR (1|PEER_EVENT)
498#define EVNT_PEERAUTH (2|PEER_EVENT)
499#define EVNT_UNREACH (3|PEER_EVENT)
500#define EVNT_REACH (4|PEER_EVENT)
501#define EVNT_PEERCLOCK (5|PEER_EVENT)
502
657/*
658 * Clock event codes
659 */
503/*
504 * Clock event codes
505 */
660#define CEVNT_NOMINAL 0 /* unspecified */
661#define CEVNT_TIMEOUT 1 /* no reply */
662#define CEVNT_BADREPLY 2 /* bad format */
663#define CEVNT_FAULT 3 /* fault */
664#define CEVNT_PROP 4 /* bad signal */
665#define CEVNT_BADDATE 5 /* bad date */
666#define CEVNT_BADTIME 6 /* bad time */
506#define CEVNT_NOMINAL 0
507#define CEVNT_TIMEOUT 1
508#define CEVNT_BADREPLY 2
509#define CEVNT_FAULT 3
510#define CEVNT_PROP 4
511#define CEVNT_BADDATE 5
512#define CEVNT_BADTIME 6
667#define CEVNT_MAX CEVNT_BADTIME
668
669/*
670 * Very misplaced value. Default port through which we send traps.
671 */
672#define TRAPPORT 18447
673
674
675/*
513#define CEVNT_MAX CEVNT_BADTIME
514
515/*
516 * Very misplaced value. Default port through which we send traps.
517 */
518#define TRAPPORT 18447
519
520
521/*
676 * To speed lookups, peers are hashed by the low order bits of the
677 * remote IP address. These definitions relate to that.
522 * To speed lookups, peers are hashed by the low order bits of the remote
523 * IP address. These definitions relate to that.
678 */
524 */
679#define NTP_HASH_SIZE 128
680#define NTP_HASH_MASK (NTP_HASH_SIZE-1)
681#define NTP_HASH_ADDR(src) (sock_hash(src) & NTP_HASH_MASK)
525#define HASH_SIZE 32
526#define HASH_MASK (HASH_SIZE-1)
527#define HASH_ADDR(src) ((SRCADR((src))^(SRCADR((src))>>8)) & HASH_MASK)
682
683/*
528
529/*
530 * How we randomize polls. The poll interval is a power of two.
531 * We chose a random value which is between 1/4 and 3/4 of the
532 * poll interval we would normally use and which is an even multiple
533 * of the EVENT_TIMEOUT. The random number routine, given an argument
534 * spread value of n, returns an integer between 0 and (1<<n)-1. This
535 * is shifted by EVENT_TIMEOUT and added to the base value.
536 */
537#if defined(HAVE_MRAND48)
538#define RANDOM (mrand48())
539#define SRANDOM(x) (srand48(x))
540#elif defined(HAVE_RANDOM)
541#define RANDOM (random())
542#define SRANDOM(x) (srandom(x))
543#else
544#define RANDOM (0)
545#define SRANDOM(x) (0)
546#endif
547
548#define RANDPOLL(x) ((1 << (x)) - 1 + (RANDOM & 0x3))
549#define RANDOM_SPREAD(poll) ((poll) - (EVENT_TIMEOUT+1))
550#define RANDOM_POLL(poll, rval) ((((rval)+1)<<EVENT_TIMEOUT) + (1<<((poll)-2)))
551
552/*
684 * min, min3 and max. Makes it easier to transliterate the spec without
685 * thinking about it.
686 */
687#define min(a,b) (((a) < (b)) ? (a) : (b))
688#define max(a,b) (((a) > (b)) ? (a) : (b))
689#define min3(a,b,c) min(min((a),(b)), (c))
690
691

--- 6 unchanged lines hidden (view full) ---

698#define PROTO_BROADDELAY 4
699#define PROTO_AUTHDELAY 5 /* (not used) */
700#define PROTO_MULTICAST_ADD 6
701#define PROTO_MULTICAST_DEL 7
702#define PROTO_NTP 8
703#define PROTO_KERNEL 9
704#define PROTO_MONITOR 10
705#define PROTO_FILEGEN 11
553 * min, min3 and max. Makes it easier to transliterate the spec without
554 * thinking about it.
555 */
556#define min(a,b) (((a) < (b)) ? (a) : (b))
557#define max(a,b) (((a) > (b)) ? (a) : (b))
558#define min3(a,b,c) min(min((a),(b)), (c))
559
560

--- 6 unchanged lines hidden (view full) ---

567#define PROTO_BROADDELAY 4
568#define PROTO_AUTHDELAY 5 /* (not used) */
569#define PROTO_MULTICAST_ADD 6
570#define PROTO_MULTICAST_DEL 7
571#define PROTO_NTP 8
572#define PROTO_KERNEL 9
573#define PROTO_MONITOR 10
574#define PROTO_FILEGEN 11
706#define PROTO_PPS 12
707#define PROTO_CAL 13
708#define PROTO_MINCLOCK 14
709#define PROTO_MAXCLOCK 15
710#define PROTO_MINSANE 16
711#define PROTO_FLOOR 17
712#define PROTO_CEILING 18
713#define PROTO_COHORT 19
714#define PROTO_CALLDELAY 20
715#define PROTO_MINDISP 21
716#define PROTO_MAXDIST 22
717 /* available 23 */
718#define PROTO_MAXHOP 24
719#define PROTO_BEACON 25
720#define PROTO_ORPHAN 26
721#define PROTO_ORPHWAIT 27
722#define PROTO_MODE7 28
723#define PROTO_UECRYPTO 29
724#define PROTO_UECRYPTONAK 30
725#define PROTO_UEDIGEST 31
726#define PROTO_PCEDIGEST 32
727
728/*
729 * Configuration items for the loop filter
730 */
575
576/*
577 * Configuration items for the loop filter
578 */
731#define LOOP_DRIFTINIT 1 /* iniitialize frequency */
732#define LOOP_KERN_CLEAR 2 /* set initial frequency offset */
733#define LOOP_MAX 3 /* set both step offsets */
734#define LOOP_MAX_BACK 4 /* set bacward-step offset */
735#define LOOP_MAX_FWD 5 /* set forward-step offset */
736#define LOOP_PANIC 6 /* set panic offseet */
737#define LOOP_PHI 7 /* set dispersion rate */
738#define LOOP_MINSTEP 8 /* set step timeout */
739#define LOOP_MINPOLL 9 /* set min poll interval (log2 s) */
740#define LOOP_ALLAN 10 /* set minimum Allan intercept */
741#define LOOP_HUFFPUFF 11 /* set huff-n'-puff filter length */
742#define LOOP_FREQ 12 /* set initial frequency */
743#define LOOP_CODEC 13 /* set audio codec frequency */
744#define LOOP_LEAP 14 /* insert leap after second 23:59 */
745#define LOOP_TICK 15 /* sim. low precision clock */
579#define LOOP_DRIFTINIT 1 /* set initial frequency offset */
580#define LOOP_DRIFTCOMP 2 /* set frequency offset */
581#define LOOP_PPSDELAY 3 /* set pps delay */
582#define LOOP_PPSBAUD 4 /* set pps baud rate */
746
747/*
748 * Configuration items for the stats printer
749 */
750#define STATS_FREQ_FILE 1 /* configure drift file */
751#define STATS_STATSDIR 2 /* directory prefix for stats files */
752#define STATS_PID_FILE 3 /* configure ntpd PID file */
583
584/*
585 * Configuration items for the stats printer
586 */
587#define STATS_FREQ_FILE 1 /* configure drift file */
588#define STATS_STATSDIR 2 /* directory prefix for stats files */
589#define STATS_PID_FILE 3 /* configure ntpd PID file */
753#define STATS_LEAP_FILE 4 /* configure ntpd leapseconds file */
754
590
755#define MJD_1900 15020 /* MJD for 1 Jan 1900 */
591#define MJD_1970 40587 /* MJD for 1 Jan 1970 */
756
757/*
758 * Default parameters. We use these in the absence of something better.
759 */
592
593/*
594 * Default parameters. We use these in the absence of something better.
595 */
596#define DEFBROADDELAY 4e-3 /* default broadcast offset */
760#define INADDR_NTP 0xe0000101 /* NTP multicast address 224.0.1.1 */
597#define INADDR_NTP 0xe0000101 /* NTP multicast address 224.0.1.1 */
761
762/*
763 * Structure used optionally for monitoring when this is turned on.
764 */
598/*
599 * Structure used optionally for monitoring when this is turned on.
600 */
765typedef struct mon_data mon_entry;
766struct mon_data {
601struct mon_data {
767 mon_entry * hash_next; /* next structure in hash list */
768 DECL_DLIST_LINK(mon_entry, mru);/* MRU list link pointers */
769 struct interface * lcladr; /* address on which this arrived */
770 l_fp first; /* first time seen */
771 l_fp last; /* last time seen */
772 int leak; /* leaky bucket accumulator */
773 int count; /* total packet count */
774 u_short flags; /* restrict flags */
775 u_char vn_mode; /* packet mode & version */
776 u_char cast_flags; /* flags MDF_?CAST */
777 sockaddr_u rmtadr; /* address of remote host */
602 struct mon_data *hash_next; /* next structure in hash list */
603 struct mon_data *mru_next; /* next structure in MRU list */
604 struct mon_data *mru_prev; /* previous structure in MRU list */
605 struct mon_data *fifo_next; /* next structure in FIFO list */
606 struct mon_data *fifo_prev; /* previous structure in FIFO list */
607 u_long lastdrop; /* last time dropped due to RES_LIMIT*/
608 u_long lasttime; /* last time data updated */
609 u_long firsttime; /* time structure initialized */
610 u_long count; /* count we have seen */
611 u_int32 rmtadr; /* address of remote host */
612 struct interface *interface; /* interface on which this arrived */
613 u_short rmtport; /* remote port last came from */
614 u_char mode; /* mode of incoming packet */
615 u_char version; /* version of incoming packet */
616 u_char cast_flags; /* flags MDF_?CAST */
778};
779
617};
618
619#define MDF_UCAST 0x1 /* unicast packet */
620#define MDF_MCAST 0x2 /* multicast packet */
621#define MDF_BCAST 0x4 /* broadcast packet */
622#define MDF_LCAST 0x8 /* local packet */
623#define MDF_ACAST 0x10 /* manycast packet */
624
780/*
625/*
781 * Values for cast_flags in mon_entry and struct peer. mon_entry uses
782 * only the first three, MDF_UCAST, MDF_MCAST, and MDF_BCAST.
783 */
784#define MDF_UCAST 0x01 /* unicast client */
785#define MDF_MCAST 0x02 /* multicast server */
786#define MDF_BCAST 0x04 /* broadcast server */
787#define MDF_POOL 0x08 /* pool client solicitor */
788#define MDF_ACAST 0x10 /* manycast client solicitor */
789#define MDF_BCLNT 0x20 /* eph. broadcast/multicast client */
790#define MDF_UCLNT 0x40 /* preemptible manycast or pool client */
791/*
792 * In the context of struct peer in ntpd, three of the cast_flags bits
793 * represent configured associations which never receive packets, and
794 * whose reach is always 0: MDF_BCAST, MDF_MCAST, and MDF_ACAST. The
795 * last can be argued as responses are received, but those responses do
796 * not affect the MDF_ACAST association's reach register, rather they
797 * (may) result in mobilizing ephemeral MDF_ACLNT associations.
798 */
799#define MDF_TXONLY_MASK (MDF_BCAST | MDF_MCAST | MDF_ACAST | MDF_POOL)
800/*
801 * manycastclient-like solicitor association cast_flags bits
802 */
803#define MDF_SOLICIT_MASK (MDF_ACAST | MDF_POOL)
804/*
805 * Values used with mon_enabled to indicate reason for enabling monitoring
806 */
626 * Values used with mon_enabled to indicate reason for enabling monitoring
627 */
807#define MON_OFF 0x00 /* no monitoring */
808#define MON_ON 0x01 /* monitoring explicitly enabled */
809#define MON_RES 0x02 /* implicit monitoring for RES_LIMITED */
628#define MON_OFF 0x00 /* no monitoring */
629#define MON_ON 0x01 /* monitoring explicitly enabled */
630#define MON_RES 0x02 /* implicit monitoring for RES_LIMITED */
810/*
811 * Structure used for restrictlist entries
812 */
631/*
632 * Structure used for restrictlist entries
633 */
813typedef struct res_addr4_tag {
814 u_int32 addr; /* IPv4 addr (host order) */
815 u_int32 mask; /* IPv4 mask (host order) */
816} res_addr4;
817
818typedef struct res_addr6_tag {
819 struct in6_addr addr; /* IPv6 addr (net order) */
820 struct in6_addr mask; /* IPv6 mask (net order) */
821} res_addr6;
822
823typedef struct restrict_u_tag restrict_u;
824struct restrict_u_tag {
825 restrict_u * link; /* link to next entry */
826 u_int32 count; /* number of packets matched */
827 u_short flags; /* accesslist flags */
828 u_short mflags; /* match flags */
829 u_long expire; /* valid until time */
830 union { /* variant starting here */
831 res_addr4 v4;
832 res_addr6 v6;
833 } u;
634struct restrictlist {
635 struct restrictlist *next; /* link to next entry */
636 u_int32 addr; /* host address (host byte order) */
637 u_int32 mask; /* mask for address (host byte order) */
638 u_long count; /* number of packets matched */
639 u_short flags; /* accesslist flags */
640 u_short mflags; /* match flags */
834};
641};
835#define V4_SIZEOF_RESTRICT_U (offsetof(restrict_u, u) \
836 + sizeof(res_addr4))
837#define V6_SIZEOF_RESTRICT_U (offsetof(restrict_u, u) \
838 + sizeof(res_addr6))
839
840/*
841 * Access flags
842 */
642
643/*
644 * Access flags
645 */
843#define RES_IGNORE 0x0001 /* ignore packet */
844#define RES_DONTSERVE 0x0002 /* access denied */
845#define RES_DONTTRUST 0x0004 /* authentication required */
846#define RES_VERSION 0x0008 /* version mismatch */
847#define RES_NOPEER 0x0010 /* new association denied */
848#define RES_LIMITED 0x0020 /* packet rate exceeded */
849#define RES_FLAGS (RES_IGNORE | RES_DONTSERVE |\
850 RES_DONTTRUST | RES_VERSION |\
851 RES_NOPEER | RES_LIMITED)
646#define RES_IGNORE 0x1 /* ignore if matched */
647#define RES_DONTSERVE 0x2 /* don't give him any time */
648#define RES_DONTTRUST 0x4 /* don't trust if matched */
649#define RES_NOQUERY 0x8 /* don't allow queries if matched */
650#define RES_NOMODIFY 0x10 /* don't allow him to modify server */
651#define RES_NOPEER 0x20 /* don't allocate memory resources */
652#define RES_NOTRAP 0x40 /* don't allow him to set traps */
653#define RES_LPTRAP 0x80 /* traps set by him are low priority */
654#define RES_LIMITED 0x100 /* limit per net number of clients */
852
655
853#define RES_NOQUERY 0x0040 /* mode 6/7 packet denied */
854#define RES_NOMODIFY 0x0080 /* mode 6/7 modify denied */
855#define RES_NOTRAP 0x0100 /* mode 6/7 set trap denied */
856#define RES_LPTRAP 0x0200 /* mode 6/7 low priority trap */
656#define RES_ALLFLAGS \
657 (RES_IGNORE|RES_DONTSERVE|RES_DONTTRUST|RES_NOQUERY\
658 |RES_NOMODIFY|RES_NOPEER|RES_NOTRAP|RES_LPTRAP|RES_LIMITED)
857
659
858#define RES_KOD 0x0400 /* send kiss of death packet */
859#define RES_MSSNTP 0x0800 /* enable MS-SNTP authentication */
860#define RES_FLAKE 0x1000 /* flakeway - drop 10% */
861#define RES_NOMRULIST 0x2000 /* mode 6 mrulist denied */
862
863#define RES_ALLFLAGS (RES_FLAGS | RES_NOQUERY | \
864 RES_NOMODIFY | RES_NOTRAP | \
865 RES_LPTRAP | RES_KOD | \
866 RES_MSSNTP | RES_FLAKE | \
867 RES_NOMRULIST)
868
869/*
870 * Match flags
871 */
660/*
661 * Match flags
662 */
872#define RESM_INTERFACE 0x1000 /* this is an interface */
873#define RESM_NTPONLY 0x2000 /* match source port 123 */
874#define RESM_SOURCE 0x4000 /* from "restrict source" */
663#define RESM_INTERFACE 0x1 /* this is an interface */
664#define RESM_NTPONLY 0x2 /* match ntp port only */
875
876/*
877 * Restriction configuration ops
878 */
879#define RESTRICT_FLAGS 1 /* add flags to restrict entry */
880#define RESTRICT_UNFLAG 2 /* remove flags from restrict entry */
881#define RESTRICT_REMOVE 3 /* remove a restrict entry */
665
666/*
667 * Restriction configuration ops
668 */
669#define RESTRICT_FLAGS 1 /* add flags to restrict entry */
670#define RESTRICT_UNFLAG 2 /* remove flags from restrict entry */
671#define RESTRICT_REMOVE 3 /* remove a restrict entry */
882#define RESTRICT_REMOVEIF 4 /* remove an interface restrict entry */
883
672
673
884/*
674/*
675 * Experimental alternate selection algorithm identifiers
676 */
677#define SELECT_1 1
678#define SELECT_2 2
679#define SELECT_3 3
680#define SELECT_4 4
681#define SELECT_5 5
682
683/*
885 * Endpoint structure for the select algorithm
886 */
887struct endpoint {
888 double val; /* offset of endpoint */
889 int type; /* interval entry/exit */
890};
891
892/*
684 * Endpoint structure for the select algorithm
685 */
686struct endpoint {
687 double val; /* offset of endpoint */
688 int type; /* interval entry/exit */
689};
690
691/*
692 * Defines for association matching
693 */
694#define AM_MODES 10 /* total number of modes */
695#define NO_PEER 0 /* action when no peer is found */
696
697/*
893 * Association matching AM[] return codes
894 */
698 * Association matching AM[] return codes
699 */
895#define AM_ERR -1 /* error */
896#define AM_NOMATCH 0 /* no match */
897#define AM_PROCPKT 1 /* server/symmetric packet */
898#define AM_BCST 2 /* broadcast packet */
899#define AM_FXMIT 3 /* client packet */
900#define AM_MANYCAST 4 /* manycast or pool */
901#define AM_NEWPASS 5 /* new passive */
902#define AM_NEWBCL 6 /* new broadcast */
903#define AM_POSSBCL 7 /* discard broadcast */
700#define AM_ERR -1
701#define AM_NOMATCH 0
702#define AM_PROCPKT 1
703#define AM_FXMIT 2
704#define AM_MANYCAST 3
705#define AM_NEWPASS 4
706#define AM_NEWBCL 5
707#define AM_POSSBCL 6
904
905/* NetInfo configuration locations */
906#ifdef HAVE_NETINFO
907#define NETINFO_CONFIG_DIR "/config/ntp"
908#endif
909
708
709/* NetInfo configuration locations */
710#ifdef HAVE_NETINFO
711#define NETINFO_CONFIG_DIR "/config/ntp"
712#endif
713
910/* ntpq -c mrulist rows per request limit in ntpd */
911#define MRU_ROW_LIMIT 256
912/* similar datagrams per response limit for ntpd */
913#define MRU_FRAGS_LIMIT 128
914#endif /* NTP_H */
714#endif /* NTP_H */