908 lines
32 KiB
C
908 lines
32 KiB
C
/*
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* ntp.h - NTP definitions for the masses
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*/
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#ifndef NTP_H
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#define NTP_H
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#include "ntp_types.h"
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#include <math.h>
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#ifdef OPENSSL
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#include "ntp_crypto.h"
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#endif /* OPENSSL */
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#include <ntp_random.h>
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#include <isc/boolean.h>
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#include <isc/list.h>
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/*
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* Calendar arithmetic - contributed by G. Healton
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*/
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#define YEAR_BREAK 500 /* years < this are tm_year values:
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* Break < AnyFourDigitYear && Break >
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* Anytm_yearYear */
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#define YEAR_PIVOT 98 /* 97/98: years < this are year 2000+
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* FYI: official UNIX pivot year is
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* 68/69 */
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/*
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* Number of Days since 1 BC Gregorian to 1 January of given year
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*/
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#define julian0(year) (((year) * 365 ) + ((year) > 0 ? (((year) + 3) \
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/ 4 - ((year - 1) / 100) + ((year - 1) / \
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400)) : 0))
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/*
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* Number of days since start of NTP time to 1 January of given year
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*/
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#define ntp0(year) (julian0(year) - julian0(1900))
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/*
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* Number of days since start of UNIX time to 1 January of given year
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*/
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#define unix0(year) (julian0(year) - julian0(1970))
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/*
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* LEAP YEAR test for full 4-digit years (e.g, 1999, 2010)
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*/
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#define isleap_4(y) ((y) % 4 == 0 && !((y) % 100 == 0 && !(y % \
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400 == 0)))
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/*
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* LEAP YEAR test for tm_year (struct tm) years (e.g, 99, 110)
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*/
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#define isleap_tm(y) ((y) % 4 == 0 && !((y) % 100 == 0 && !(((y) \
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+ 1900) % 400 == 0)))
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/*
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* to convert simple two-digit years to tm_year style years:
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*
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* if (year < YEAR_PIVOT)
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* year += 100;
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*
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* to convert either two-digit OR tm_year years to four-digit years:
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*
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* if (year < YEAR_PIVOT)
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* year += 100;
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*
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* if (year < YEAR_BREAK)
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* year += 1900;
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*/
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/*
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* How to get signed characters. On machines where signed char works,
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* use it. On machines where signed char doesn't work, char had better
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* be signed.
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*/
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#ifdef NEED_S_CHAR_TYPEDEF
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# if SIZEOF_SIGNED_CHAR
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typedef signed char s_char;
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# else
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typedef char s_char;
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# endif
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/* XXX: Why is this sequent bit INSIDE this test? */
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# ifdef sequent
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# undef SO_RCVBUF
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# undef SO_SNDBUF
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# endif
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#endif
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#ifndef TRUE
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# define TRUE 1
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#endif /* TRUE */
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#ifndef FALSE
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# define FALSE 0
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#endif /* FALSE */
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/*
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* NTP protocol parameters. See section 3.2.6 of the specification.
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*/
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#define NTP_VERSION ((u_char)4) /* current version number */
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#define NTP_OLDVERSION ((u_char)1) /* oldest credible version */
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#define NTP_PORT 123 /* included for non-unix machines */
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/*
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* Poll interval parameters
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*/
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#define NTP_UNREACH 24 /* poll unreach threshold */
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#define NTP_MINPOLL 4 /* log2 min poll interval (16 s) */
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#define NTP_MINDPOLL 6 /* log2 default min poll (64 s) */
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#define NTP_MAXDPOLL 10 /* log2 default max poll (~17 m) */
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#define NTP_MAXPOLL 17 /* log2 max poll interval (~36 h) */
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#define NTP_BURST 8 /* packets in burst */
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#define BURST_DELAY 2 /* interburst delay (s) */
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#define RESP_DELAY 1 /* crypto response delay (s) */
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/*
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* Clock filter algorithm tuning parameters
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*/
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#define MAXDISPERSE 16. /* max dispersion */
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#define NTP_SHIFT 8 /* clock filter stages */
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#define NTP_FWEIGHT .5 /* clock filter weight */
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/*
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* Selection algorithm tuning parameters
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*/
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#define NTP_MINCLOCK 3 /* min survivors */
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#define NTP_MAXCLOCK 10 /* max candidates */
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#define NTP_MAXASSOC 50 /* max associations */
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#define MINDISPERSE .005 /* min dispersion increment */
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#define MAXDISTANCE 1. /* max root distance (select threshold) */
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#define CLOCK_SGATE 3. /* popcorn spike gate */
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#define HUFFPUFF 900 /* huff-n'-puff sample interval (s) */
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#define MAXHOP 2 /* anti-clockhop threshold */
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#define MAX_TTL 8 /* max ttl mapping vector size */
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#define BEACON 7200 /* manycast beacon interval */
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#define NTP_MAXEXTEN 1024 /* max extension field size */
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/*
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* Miscellaneous stuff
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*/
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#define NTP_MAXKEY 65535 /* max authentication key number */
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/*
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* Limits of things
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*/
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#define MAXFILENAME 128 /* max length of file name */
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#define MAXHOSTNAME 512 /* max length of host/node name */
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#define NTP_MAXSTRLEN 256 /* max string length */
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/*
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* Operations for jitter calculations (these use doubles).
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*
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* Note that we carefully separate the jitter component from the
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* dispersion component (frequency error plus precision). The frequency
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* error component is computed as CLOCK_PHI times the difference between
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* the epoch of the time measurement and the reference time. The
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* precision componen is computed as the square root of the mean of the
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* squares of a zero-mean, uniform distribution of unit maximum
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* amplitude. Whether this makes statistical sense may be arguable.
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*/
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#define SQUARE(x) ((x) * (x))
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#define SQRT(x) (sqrt(x))
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#define DIFF(x, y) (SQUARE((x) - (y)))
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#define LOGTOD(a) ((a) < 0 ? 1. / (1L << -(a)) : \
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1L << (int)(a)) /* log2 to double */
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#define UNIVAR(x) (SQUARE(.28867513 * LOGTOD(x))) /* std uniform distr */
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#define ULOGTOD(a) (1L << (int)(a)) /* ulog2 to double */
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#define EVENT_TIMEOUT 0 /* one second, that is */
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/*
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* The interface structure is used to hold the addresses and socket
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* numbers of each of the interfaces we are using.
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*/
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struct interface {
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SOCKET fd; /* socket this is opened on */
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SOCKET bfd; /* socket for receiving broadcasts */
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struct sockaddr_storage sin; /* interface address */
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struct sockaddr_storage bcast; /* broadcast address */
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struct sockaddr_storage mask; /* interface mask */
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char name[32]; /* name of interface */
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short family; /* Address family */
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int flags; /* interface flags */
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int last_ttl; /* last TTL specified */
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u_int32 addr_refid; /* IPv4 addr or IPv6 hash */
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int num_mcast; /* No. of IP addresses in multicast socket */
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u_long starttime; /* current_time as of creation of interface structure */
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volatile long received; /* number of incoming packets */
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long sent; /* number of outgoing packets */
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long notsent; /* number of send failures */
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u_int scopeid; /* Scope used for Multicasting */
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u_int ifindex; /* interface index */
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u_int ifnum; /* sequential interface instance count */
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u_char phase; /* phase in update cycle */
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isc_boolean_t ignore_packets; /* Specify whether the packet should be ignored */
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ISC_LIST(struct peer) peers; /* list of peers for the interface */
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u_int peercnt; /* number of peers referencinf this interface - informational only */
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ISC_LINK(struct interface) link; /* interface list */
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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_UP 0x001 /* Interface is up */
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#define INT_PPP 0x002 /* Point-to-point interface */
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#define INT_LOOPBACK 0x004 /* the loopback interface */
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#define INT_BROADCAST 0x008 /* can broadcast out this interface */
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#define INT_MULTICAST 0x010 /* can multicast out this interface */
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#define INT_BCASTOPEN 0x020 /* broadcast socket is open */
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#define INT_MCASTOPEN 0x040 /* multicasting enabled */
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#define INT_WILDCARD 0x080 /* wildcard interface - usually skipped */
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#define INT_MCASTIF 0x100 /* bound directly to MCAST address */
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/*
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* Define flasher bits (tests 1 through 11 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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* Packet errors
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*/
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#define TEST1 0X0001 /* duplicate packet */
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#define TEST2 0x0002 /* bogus packet */
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#define TEST3 0x0004 /* protocol unsynchronized */
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#define TEST4 0x0008 /* access denied */
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#define TEST5 0x0010 /* authentication error */
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#define TEST6 0x0020 /* bad synch or stratum */
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#define TEST7 0x0040 /* bad header data */
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#define TEST8 0x0080 /* autokey error */
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#define TEST9 0x0100 /* crypto error */
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#define PKT_TEST_MASK (TEST1 | TEST2 | TEST3 | TEST4 | TEST5 |\
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TEST6 | TEST7 | TEST8 | TEST9)
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/*
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* Peer errors
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*/
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#define TEST10 0x0200 /* peer bad synch or stratum */
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#define TEST11 0x0400 /* peer distance exceeded */
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#define TEST12 0x0800 /* peer synchronization loop */
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#define TEST13 0x1000 /* peer unreacable */
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#define PEER_TEST_MASK (TEST10 | TEST11 | TEST12 | TEST13)
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/*
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* Authentication codes
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*/
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#define AUTH_NONE 0 /* no authentication */
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#define AUTH_OK 1 /* authentication OK */
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#define AUTH_ERROR 2 /* authentication error */
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#define AUTH_CRYPTO 3 /* crypto-NAK */
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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; /* pointer to next association */
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struct peer *ass_next; /* link pointer in associd hash */
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struct sockaddr_storage srcadr; /* address of remote host */
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struct interface *dstadr; /* pointer to address on local host */
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ISC_LINK(struct peer) ilink; /* interface link list */
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associd_t associd; /* association ID */
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u_char version; /* version number */
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u_char hmode; /* local association mode */
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u_char hpoll; /* local poll interval */
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u_char minpoll; /* min poll interval */
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u_char maxpoll; /* max poll interval */
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u_int flags; /* association flags */
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u_char cast_flags; /* additional flags */
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u_int flash; /* protocol error test tally bits */
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u_char last_event; /* last peer error code */
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u_char num_events; /* number of error events */
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u_char ttl; /* ttl/refclock mode */
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/*
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* Variables used by reference clock support
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*/
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#ifdef REFCLOCK
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struct refclockproc *procptr; /* refclock structure pointer */
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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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#endif /* REFCLOCK */
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/*
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* Variables set by received packet
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*/
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u_char leap; /* local leap indicator */
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u_char pmode; /* remote association mode */
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u_char stratum; /* remote stratum */
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u_char ppoll; /* remote poll interval */
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s_char precision; /* remote clock precision */
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double rootdelay; /* roundtrip delay to primary clock */
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double rootdispersion; /* dispersion to primary clock */
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u_int32 refid; /* remote reference ID */
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l_fp reftime; /* update epoch */
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/*
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* Variables used by authenticated client
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*/
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keyid_t keyid; /* current key ID */
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#ifdef OPENSSL
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#define clear_to_zero assoc
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associd_t assoc; /* peer association ID */
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u_int32 crypto; /* peer status word */
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EVP_PKEY *pkey; /* public key */
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const EVP_MD *digest; /* message digest algorithm */
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char *subject; /* certificate subject name */
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char *issuer; /* certificate issuer name */
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keyid_t pkeyid; /* previous key ID */
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keyid_t pcookie; /* peer cookie */
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EVP_PKEY *ident_pkey; /* identity key */
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tstamp_t fstamp; /* identity filestamp */
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BIGNUM *iffval; /* IFF/GQ challenge */
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BIGNUM *grpkey; /* GQ group key */
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struct value cookval; /* cookie values */
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struct value recval; /* receive autokey values */
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struct exten *cmmd; /* extension pointer */
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/*
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* Variables used by authenticated server
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*/
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keyid_t *keylist; /* session key ID list */
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int keynumber; /* current key number */
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struct value encrypt; /* send encrypt values */
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struct value sndval; /* send autokey values */
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struct value tai_leap; /* send leapsecond table */
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#else /* OPENSSL */
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#define clear_to_zero status
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#endif /* OPENSSL */
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/*
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* Ephemeral state variables
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*/
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u_char status; /* peer status */
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u_char reach; /* reachability register */
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u_long epoch; /* reference epoch */
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u_int burst; /* packets remaining in burst */
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u_int filter_nextpt; /* index into filter shift register */
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double filter_delay[NTP_SHIFT]; /* delay shift register */
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double filter_offset[NTP_SHIFT]; /* offset shift register */
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double filter_disp[NTP_SHIFT]; /* dispersion shift register */
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u_long filter_epoch[NTP_SHIFT]; /* epoch shift register */
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u_char filter_order[NTP_SHIFT]; /* filter sort index */
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l_fp org; /* originate time stamp */
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l_fp rec; /* receive time stamp */
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l_fp xmt; /* transmit time stamp */
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double offset; /* peer clock offset */
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double delay; /* peer roundtrip delay */
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double jitter; /* peer jitter (squares) */
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double disp; /* peer dispersion */
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double estbdelay; /* clock offset to broadcast server */
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/*
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* End of clear-to-zero area
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*/
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u_long update; /* receive epoch */
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u_int unreach; /* unreachable count */
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#define end_clear_to_zero unreach
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u_long outdate; /* send time last packet */
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u_long nextdate; /* send time next packet */
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u_long nextaction; /* peer local activity timeout (refclocks) */
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void (*action) P((struct peer *)); /* action timeout function */
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/*
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* Statistic counters
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*/
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u_long timereset; /* time stat counters were reset */
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u_long timereceived; /* last packet received time */
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u_long timereachable; /* last reachable/unreachable time */
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u_long sent; /* packets sent */
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u_long received; /* packets received */
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u_long processed; /* packets processed by the protocol */
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u_long badauth; /* packets cryptosum failed */
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u_long bogusorg; /* packets bogus origin */
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u_long oldpkt; /* packets duplicate packet */
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u_long seldisptoolarge; /* packets dispersion too large */
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u_long selbroken; /* not used */
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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 and packet mode. Only the modes through
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* MODE_BROADCAST and MODE_BCLIENT appear in the transition
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* function. MODE_CONTROL and MODE_PRIVATE can appear in packets,
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* but those never survive to the transition function.
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* is a
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*/
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#define MODE_UNSPEC 0 /* unspecified (old version) */
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#define MODE_ACTIVE 1 /* symmetric active mode */
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#define MODE_PASSIVE 2 /* symmetric passive mode */
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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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/*
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* These can appear in packets
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*/
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#define MODE_CONTROL 6 /* control mode */
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#define MODE_PRIVATE 7 /* private mode */
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/*
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* This is a madeup mode for broadcast client.
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*/
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#define MODE_BCLIENT 6 /* broadcast client mode */
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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) /* default stratum */
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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)16) /* unspecified */
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/*
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* Values for peer.flags
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*/
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#define FLAG_CONFIG 0x0001 /* association was configured */
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#define FLAG_AUTHENABLE 0x0002 /* authentication required */
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#define FLAG_AUTHENTIC 0x0004 /* last message was authentic */
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#define FLAG_SKEY 0x0008 /* autokey authentication */
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#define FLAG_MCAST 0x0010 /* multicast client mode */
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#define FLAG_REFCLOCK 0x0020 /* this is actually a reference clock */
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#define FLAG_SYSPEER 0x0040 /* this is one of the selected peers */
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#define FLAG_PREFER 0x0080 /* this is the preferred peer */
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#define FLAG_BURST 0x0100 /* burst mode */
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#define FLAG_IBURST 0x0200 /* initial burst mode */
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#define FLAG_NOSELECT 0x0400 /* never select */
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#define FLAG_ASSOC 0x0800 /* autokey request */
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#define FLAG_FIXPOLL 0x1000 /* stick at minpoll */
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#define FLAG_TRUE 0x2000 /* select truechimer */
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#define FLAG_PREEMPT 0x4000 /* preemptable association */
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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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#define CRYPTO_TO_ZERO(p) ((char *)&((p)->clear_to_zero))
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#define END_CRYPTO_TO_ZERO(p) ((char *)&((p)->end_clear_to_zero))
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#define LEN_CRYPTO_TO_ZERO (END_CRYPTO_TO_ZERO((struct peer *)0) \
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- CRYPTO_TO_ZERO((struct peer *)0))
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/*
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* Reference clock identifiers (for pps signal)
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*/
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#define PPSREFID (u_int32)"PPS " /* used when pps controls stratum>1 */
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/*
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* Reference clock types. Added as necessary.
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*/
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#define REFCLK_NONE 0 /* unknown or missing */
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#define REFCLK_LOCALCLOCK 1 /* external (e.g., lockclock) */
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#define REFCLK_GPS_TRAK 2 /* TRAK 8810 GPS Receiver */
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#define REFCLK_WWV_PST 3 /* PST/Traconex 1020 WWV/H */
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#define REFCLK_SPECTRACOM 4 /* Spectracom (generic) Receivers */
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#define REFCLK_TRUETIME 5 /* TrueTime (generic) Receivers */
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#define REFCLK_IRIG_AUDIO 6 /* IRIG-B/W audio decoder */
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|
#define REFCLK_CHU_AUDIO 7 /* CHU audio demodulator/decoder */
|
|
#define REFCLK_PARSE 8 /* generic driver (usually DCF77,GPS,MSF) */
|
|
#define REFCLK_GPS_MX4200 9 /* Magnavox MX4200 GPS */
|
|
#define REFCLK_GPS_AS2201 10 /* Austron 2201A GPS */
|
|
#define REFCLK_GPS_ARBITER 11 /* Arbiter 1088A/B/ GPS */
|
|
#define REFCLK_IRIG_TPRO 12 /* KSI/Odetics TPRO-S IRIG */
|
|
#define REFCLK_ATOM_LEITCH 13 /* Leitch CSD 5300 Master Clock */
|
|
#define REFCLK_MSF_EES 14 /* EES M201 MSF Receiver */
|
|
#define REFCLK_GPSTM_TRUE 15 /* OLD TrueTime GPS/TM-TMD Receiver */
|
|
#define REFCLK_IRIG_BANCOMM 16 /* Bancomm GPS/IRIG Interface */
|
|
#define REFCLK_GPS_DATUM 17 /* Datum Programmable Time System */
|
|
#define REFCLK_ACTS 18 /* Generic Auto Computer Time Service */
|
|
#define REFCLK_WWV_HEATH 19 /* Heath GC1000 WWV/WWVH Receiver */
|
|
#define REFCLK_GPS_NMEA 20 /* NMEA based GPS clock */
|
|
#define REFCLK_GPS_VME 21 /* TrueTime GPS-VME Interface */
|
|
#define REFCLK_ATOM_PPS 22 /* 1-PPS Clock Discipline */
|
|
#define REFCLK_PTB_ACTS 23 /* replaced by REFCLK_ACTS */
|
|
#define REFCLK_USNO 24 /* replaced by REFCLK_ACTS */
|
|
#define REFCLK_GPS_HP 26 /* HP 58503A Time/Frequency Receiver */
|
|
#define REFCLK_ARCRON_MSF 27 /* ARCRON MSF radio clock. */
|
|
#define REFCLK_SHM 28 /* clock attached thru shared memory */
|
|
#define REFCLK_PALISADE 29 /* Trimble Navigation Palisade GPS */
|
|
#define REFCLK_ONCORE 30 /* Motorola UT Oncore GPS */
|
|
#define REFCLK_GPS_JUPITER 31 /* Rockwell Jupiter GPS receiver */
|
|
#define REFCLK_CHRONOLOG 32 /* Chrono-log K WWVB receiver */
|
|
#define REFCLK_DUMBCLOCK 33 /* Dumb localtime clock */
|
|
#define REFCLK_ULINK 34 /* Ultralink M320 WWVB receiver */
|
|
#define REFCLK_PCF 35 /* Conrad parallel port radio clock */
|
|
#define REFCLK_WWV_AUDIO 36 /* WWV/H audio demodulator/decoder */
|
|
#define REFCLK_FG 37 /* Forum Graphic GPS */
|
|
#define REFCLK_HOPF_SERIAL 38 /* hopf DCF77/GPS serial receiver */
|
|
#define REFCLK_HOPF_PCI 39 /* hopf DCF77/GPS PCI receiver */
|
|
#define REFCLK_JJY 40 /* JJY receiver */
|
|
#define REFCLK_TT560 41 /* TrueTime 560 IRIG-B decoder */
|
|
#define REFCLK_ZYFER 42 /* Zyfer GPStarplus receiver */
|
|
#define REFCLK_RIPENCC 43 /* RIPE NCC Trimble driver */
|
|
#define REFCLK_NEOCLOCK4X 44 /* NeoClock4X DCF77 or TDF receiver */
|
|
#define REFCLK_MAX 44 /* NeoClock4X DCF77 or TDF receiver */
|
|
|
|
/*
|
|
* Macro for sockaddr_storage structures operations
|
|
*/
|
|
#define SOCKCMP(sock1, sock2) \
|
|
(((struct sockaddr_storage *)sock1)->ss_family \
|
|
== ((struct sockaddr_storage *)sock2)->ss_family ? \
|
|
((struct sockaddr_storage *)sock1)->ss_family == AF_INET ? \
|
|
memcmp(&((struct sockaddr_in *)sock1)->sin_addr, \
|
|
&((struct sockaddr_in *)sock2)->sin_addr, \
|
|
sizeof(struct in_addr)) == 0 : \
|
|
memcmp(&((struct sockaddr_in6 *)sock1)->sin6_addr, \
|
|
&((struct sockaddr_in6 *)sock2)->sin6_addr, \
|
|
sizeof(struct in6_addr)) == 0 : \
|
|
0)
|
|
|
|
#define SOCKNUL(sock1) \
|
|
(((struct sockaddr_storage *)sock1)->ss_family == AF_INET ? \
|
|
(((struct sockaddr_in *)sock1)->sin_addr.s_addr == 0) : \
|
|
(IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)sock1)->sin6_addr)))
|
|
|
|
#define SOCKLEN(sock) \
|
|
(((struct sockaddr_storage *)sock)->ss_family == AF_INET ? \
|
|
(sizeof(struct sockaddr_in)) : (sizeof(struct sockaddr_in6)))
|
|
|
|
#define ANYSOCK(sock) \
|
|
memset(((struct sockaddr_storage *)sock), 0, \
|
|
sizeof(struct sockaddr_storage))
|
|
|
|
#define ANY_INTERFACE_CHOOSE(sock) \
|
|
(((struct sockaddr_storage *)sock)->ss_family == AF_INET ? \
|
|
any_interface : any6_interface)
|
|
|
|
/*
|
|
* We tell reference clocks from real peers by giving the reference
|
|
* clocks an address of the form 127.127.t.u, where t is the type and
|
|
* u is the unit number. We define some of this here since we will need
|
|
* some sanity checks to make sure this address isn't interpretted as
|
|
* that of a normal peer.
|
|
*/
|
|
#define REFCLOCK_ADDR 0x7f7f0000 /* 127.127.0.0 */
|
|
#define REFCLOCK_MASK 0xffff0000 /* 255.255.0.0 */
|
|
|
|
#define ISREFCLOCKADR(srcadr) ((SRCADR(srcadr) & REFCLOCK_MASK) \
|
|
== REFCLOCK_ADDR)
|
|
|
|
/*
|
|
* Macro for checking for invalid addresses. This is really, really
|
|
* gross, but is needed so no one configures a host on net 127 now that
|
|
* we're encouraging it the the configuration file.
|
|
*/
|
|
#define LOOPBACKADR 0x7f000001
|
|
#define LOOPNETMASK 0xff000000
|
|
|
|
#define ISBADADR(srcadr) (((SRCADR(srcadr) & LOOPNETMASK) \
|
|
== (LOOPBACKADR & LOOPNETMASK)) \
|
|
&& (SRCADR(srcadr) != LOOPBACKADR))
|
|
|
|
/*
|
|
* Utilities for manipulating addresses and port numbers
|
|
*/
|
|
#define NSRCADR(src) (((struct sockaddr_in *)src)->sin_addr.s_addr) /* address in net byte order */
|
|
#define NSRCPORT(src) (((struct sockaddr_in *)src)->sin_port) /* port in net byte order */
|
|
#define SRCADR(src) (ntohl(NSRCADR((src)))) /* address in host byte order */
|
|
#define SRCPORT(src) (ntohs(NSRCPORT((src)))) /* host port */
|
|
|
|
#define CAST_V4(src) ((struct sockaddr_in *)&(src))
|
|
#define CAST_V6(src) ((struct sockaddr_in6 *)&(src))
|
|
#define GET_INADDR(src) (CAST_V4(src)->sin_addr.s_addr)
|
|
#define GET_INADDR6(src) (CAST_V6(src)->sin6_addr)
|
|
|
|
#define SET_HOSTMASK(addr, family) \
|
|
do { \
|
|
memset((char *)(addr), 0, sizeof(struct sockaddr_storage)); \
|
|
(addr)->ss_family = (family); \
|
|
if ((family) == AF_INET) \
|
|
GET_INADDR(*(addr)) = 0xffffffff; \
|
|
else \
|
|
memset(&GET_INADDR6(*(addr)), 0xff, \
|
|
sizeof(struct in6_addr)); \
|
|
} while(0)
|
|
|
|
/*
|
|
* NTP packet format. The mac field is optional. It isn't really
|
|
* an l_fp either, but for now declaring it that way is convenient.
|
|
* See Appendix A in the specification.
|
|
*
|
|
* Note that all u_fp and l_fp values arrive in network byte order
|
|
* and must be converted (except the mac, which isn't, really).
|
|
*/
|
|
struct pkt {
|
|
u_char li_vn_mode; /* leap indicator, version and mode */
|
|
u_char stratum; /* peer stratum */
|
|
u_char ppoll; /* peer poll interval */
|
|
s_char precision; /* peer clock precision */
|
|
u_fp rootdelay; /* distance to primary clock */
|
|
u_fp rootdispersion; /* clock dispersion */
|
|
u_int32 refid; /* reference clock ID */
|
|
l_fp reftime; /* time peer clock was last updated */
|
|
l_fp org; /* originate time stamp */
|
|
l_fp rec; /* receive time stamp */
|
|
l_fp xmt; /* transmit time stamp */
|
|
|
|
#define LEN_PKT_NOMAC 12 * sizeof(u_int32) /* min header length */
|
|
#define LEN_PKT_MAC LEN_PKT_NOMAC + sizeof(u_int32)
|
|
#define MIN_MAC_LEN 3 * sizeof(u_int32) /* DES */
|
|
#define MAX_MAC_LEN 5 * sizeof(u_int32) /* MD5 */
|
|
|
|
/*
|
|
* The length of the packet less MAC must be a multiple of 64
|
|
* with an RSA modulus and Diffie-Hellman prime of 64 octets
|
|
* and maximum host name of 128 octets, the maximum autokey
|
|
* command is 152 octets and maximum autokey response is 460
|
|
* octets. A packet can contain no more than one command and one
|
|
* response, so the maximum total extension field length is 672
|
|
* octets. But, to handle humungus certificates, the bank must
|
|
* be broke.
|
|
*/
|
|
#ifdef OPENSSL
|
|
u_int32 exten[NTP_MAXEXTEN / 4]; /* max extension field */
|
|
#else /* OPENSSL */
|
|
u_int32 exten[1]; /* misused */
|
|
#endif /* OPENSSL */
|
|
u_char mac[MAX_MAC_LEN]; /* mac */
|
|
};
|
|
|
|
/*
|
|
* Stuff for extracting things from li_vn_mode
|
|
*/
|
|
#define PKT_MODE(li_vn_mode) ((u_char)((li_vn_mode) & 0x7))
|
|
#define PKT_VERSION(li_vn_mode) ((u_char)(((li_vn_mode) >> 3) & 0x7))
|
|
#define PKT_LEAP(li_vn_mode) ((u_char)(((li_vn_mode) >> 6) & 0x3))
|
|
|
|
/*
|
|
* Stuff for putting things back into li_vn_mode
|
|
*/
|
|
#define PKT_LI_VN_MODE(li, vn, md) \
|
|
((u_char)((((li) << 6) & 0xc0) | (((vn) << 3) & 0x38) | ((md) & 0x7)))
|
|
|
|
|
|
/*
|
|
* Dealing with stratum. 0 gets mapped to 16 incoming, and back to 0
|
|
* on output.
|
|
*/
|
|
#define PKT_TO_STRATUM(s) ((u_char)(((s) == (STRATUM_PKT_UNSPEC)) ?\
|
|
(STRATUM_UNSPEC) : (s)))
|
|
|
|
#define STRATUM_TO_PKT(s) ((u_char)(((s) == (STRATUM_UNSPEC)) ?\
|
|
(STRATUM_PKT_UNSPEC) : (s)))
|
|
|
|
/*
|
|
* Event codes. Used for reporting errors/events to the control module
|
|
*/
|
|
#define PEER_EVENT 0x080 /* this is a peer event */
|
|
#define CRPT_EVENT 0x100 /* this is a crypto event */
|
|
|
|
/*
|
|
* System event codes
|
|
*/
|
|
#define EVNT_UNSPEC 0 /* unspecified */
|
|
#define EVNT_SYSRESTART 1 /* system restart */
|
|
#define EVNT_SYSFAULT 2 /* wsystem or hardware fault */
|
|
#define EVNT_SYNCCHG 3 /* new leap or synch change */
|
|
#define EVNT_PEERSTCHG 4 /* new source or stratum */
|
|
#define EVNT_CLOCKRESET 5 /* clock reset */
|
|
#define EVNT_BADDATETIM 6 /* invalid time or date */
|
|
#define EVNT_CLOCKEXCPT 7 /* reference clock exception */
|
|
|
|
/*
|
|
* Peer event codes
|
|
*/
|
|
#define EVNT_PEERIPERR (1 | PEER_EVENT) /* IP error */
|
|
#define EVNT_PEERAUTH (2 | PEER_EVENT) /* authentication failure */
|
|
#define EVNT_UNREACH (3 | PEER_EVENT) /* change to unreachable */
|
|
#define EVNT_REACH (4 | PEER_EVENT) /* change to reachable */
|
|
#define EVNT_PEERCLOCK (5 | PEER_EVENT) /* clock exception */
|
|
|
|
/*
|
|
* Clock event codes
|
|
*/
|
|
#define CEVNT_NOMINAL 0 /* unspecified */
|
|
#define CEVNT_TIMEOUT 1 /* poll timeout */
|
|
#define CEVNT_BADREPLY 2 /* bad reply format */
|
|
#define CEVNT_FAULT 3 /* hardware or software fault */
|
|
#define CEVNT_PROP 4 /* propagation failure */
|
|
#define CEVNT_BADDATE 5 /* bad date format or value */
|
|
#define CEVNT_BADTIME 6 /* bad time format or value */
|
|
#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 NTP_HASH_SIZE 128
|
|
#define NTP_HASH_MASK (NTP_HASH_SIZE-1)
|
|
#define NTP_HASH_ADDR(src) sock_hash(src)
|
|
|
|
/*
|
|
* How we randomize polls. The poll interval is a power of two. We chose
|
|
* a random interval which is this value plus-minus one second.
|
|
*/
|
|
#define RANDPOLL(x) ((1 << (x)) - 1 + (ntp_random() & 0x3))
|
|
|
|
/*
|
|
* min, min3 and max. Makes it easier to transliterate the spec without
|
|
* thinking about it.
|
|
*/
|
|
#define min(a,b) (((a) < (b)) ? (a) : (b))
|
|
#define max(a,b) (((a) > (b)) ? (a) : (b))
|
|
#define min3(a,b,c) min(min((a),(b)), (c))
|
|
|
|
|
|
/*
|
|
* Configuration items. These are for the protocol module (proto_config())
|
|
*/
|
|
#define PROTO_BROADCLIENT 1
|
|
#define PROTO_PRECISION 2 /* (not used) */
|
|
#define PROTO_AUTHENTICATE 3
|
|
#define PROTO_BROADDELAY 4
|
|
#define PROTO_AUTHDELAY 5 /* (not used) */
|
|
#define PROTO_MULTICAST_ADD 6
|
|
#define PROTO_MULTICAST_DEL 7
|
|
#define PROTO_NTP 8
|
|
#define PROTO_KERNEL 9
|
|
#define PROTO_MONITOR 10
|
|
#define PROTO_FILEGEN 11
|
|
#define PROTO_PPS 12
|
|
#define PROTO_CAL 13
|
|
#define PROTO_MINCLOCK 14
|
|
#define PROTO_MAXCLOCK 15
|
|
#define PROTO_MINSANE 16
|
|
#define PROTO_FLOOR 17
|
|
#define PROTO_CEILING 18
|
|
#define PROTO_COHORT 19
|
|
#define PROTO_CALLDELAY 20
|
|
#define PROTO_MINDISP 21
|
|
#define PROTO_MAXDIST 22
|
|
#define PROTO_ADJ 23
|
|
#define PROTO_MAXHOP 24
|
|
#define PROTO_BEACON 25
|
|
#define PROTO_ORPHAN 26
|
|
|
|
/*
|
|
* Configuration items for the loop filter
|
|
*/
|
|
#define LOOP_DRIFTINIT 1 /* set initial frequency offset */
|
|
#define LOOP_DRIFTCOMP 2 /* set frequency offset */
|
|
#define LOOP_MAX 3 /* set step offset */
|
|
#define LOOP_PANIC 4 /* set panic offseet */
|
|
#define LOOP_PHI 5 /* set dispersion rate */
|
|
#define LOOP_MINSTEP 6 /* set step timeout */
|
|
#define LOOP_MINPOLL 7 /* set min poll interval (log2 s) */
|
|
#define LOOP_ALLAN 8 /* set minimum Allan intercept */
|
|
#define LOOP_HUFFPUFF 9 /* set huff-n'-puff filter length */
|
|
#define LOOP_FREQ 10 /* set initial frequency */
|
|
#define LOOP_KERN_CLEAR 11 /* reset kernel pll parameters */
|
|
|
|
/*
|
|
* Configuration items for the stats printer
|
|
*/
|
|
#define STATS_FREQ_FILE 1 /* configure drift file */
|
|
#define STATS_STATSDIR 2 /* directory prefix for stats files */
|
|
#define STATS_PID_FILE 3 /* configure ntpd PID file */
|
|
|
|
#define MJD_1900 15020 /* MJD for 1 Jan 1900 */
|
|
|
|
/*
|
|
* Default parameters. We use these in the absence of something better.
|
|
*/
|
|
#define DEFBROADDELAY 4e-3 /* default broadcast offset */
|
|
#define INADDR_NTP 0xe0000101 /* NTP multicast address 224.0.1.1 */
|
|
|
|
/*
|
|
* Structure used optionally for monitoring when this is turned on.
|
|
*/
|
|
struct mon_data {
|
|
struct mon_data *hash_next; /* next structure in hash list */
|
|
struct mon_data *mru_next; /* next structure in MRU list */
|
|
struct mon_data *mru_prev; /* previous structure in MRU list */
|
|
u_long drop_count; /* dropped due RESLIMIT*/
|
|
double avg_interval; /* average interpacket interval */
|
|
u_long lasttime; /* interval since last packet */
|
|
u_long count; /* total packet count */
|
|
struct sockaddr_storage 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 */
|
|
};
|
|
|
|
/*
|
|
* Values for cast_flags
|
|
*/
|
|
#define MDF_UCAST 0x01 /* unicast */
|
|
#define MDF_MCAST 0x02 /* multicast */
|
|
#define MDF_BCAST 0x04 /* broadcast */
|
|
#define MDF_LCAST 0x08 /* localcast */
|
|
#define MDF_ACAST 0x10 /* manycast */
|
|
#define MDF_BCLNT 0x20 /* broadcast client */
|
|
#define MDF_ACLNT 0x40 /* manycast client */
|
|
|
|
/*
|
|
* Values used with mon_enabled to indicate reason for enabling monitoring
|
|
*/
|
|
#define MON_OFF 0x00 /* no monitoring */
|
|
#define MON_ON 0x01 /* monitoring explicitly enabled */
|
|
#define MON_RES 0x02 /* implicit monitoring for RES_LIMITED */
|
|
/*
|
|
* Structure used for restrictlist entries
|
|
*/
|
|
struct restrictlist {
|
|
struct restrictlist *next; /* link to next entry */
|
|
u_int32 addr; /* Ipv4 host address (host byte order) */
|
|
u_int32 mask; /* Ipv4 mask for address (host byte order) */
|
|
u_long count; /* number of packets matched */
|
|
u_short flags; /* accesslist flags */
|
|
u_short mflags; /* match flags */
|
|
};
|
|
|
|
struct restrictlist6 {
|
|
struct restrictlist6 *next; /* link to next entry */
|
|
struct in6_addr addr6; /* Ipv6 host address */
|
|
struct in6_addr mask6; /* Ipv6 mask address */
|
|
u_long count; /* number of packets matched */
|
|
u_short flags; /* accesslist flags */
|
|
u_short mflags; /* match flags */
|
|
};
|
|
|
|
|
|
/*
|
|
* Access flags
|
|
*/
|
|
#define RES_IGNORE 0x001 /* ignore packet */
|
|
#define RES_DONTSERVE 0x002 /* access denied */
|
|
#define RES_DONTTRUST 0x004 /* authentication required */
|
|
#define RES_VERSION 0x008 /* version mismatch */
|
|
#define RES_NOPEER 0x010 /* new association denied */
|
|
#define RES_LIMITED 0x020 /* packet rate exceeded */
|
|
|
|
#define RES_FLAGS (RES_IGNORE | RES_DONTSERVE |\
|
|
RES_DONTTRUST | RES_VERSION |\
|
|
RES_NOPEER | RES_LIMITED)
|
|
|
|
#define RES_NOQUERY 0x040 /* mode 6/7 packet denied */
|
|
#define RES_NOMODIFY 0x080 /* mode 6/7 modify denied */
|
|
#define RES_NOTRAP 0x100 /* mode 6/7 set trap denied */
|
|
#define RES_LPTRAP 0x200 /* mode 6/7 low priority trap */
|
|
|
|
#define RES_DEMOBILIZE 0x400 /* send kiss of death packet */
|
|
#define RES_TIMEOUT 0x800 /* timeout this entry */
|
|
|
|
#define RES_ALLFLAGS (RES_FLAGS | RES_NOQUERY |\
|
|
RES_NOMODIFY | RES_NOTRAP |\
|
|
RES_LPTRAP | RES_DEMOBILIZE |\
|
|
RES_TIMEOUT)
|
|
|
|
/*
|
|
* 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 */
|
|
#define RESTRICT_REMOVEIF 4 /* remove an interface restrict entry */
|
|
|
|
/*
|
|
* Endpoint structure for the select algorithm
|
|
*/
|
|
struct endpoint {
|
|
double val; /* offset of endpoint */
|
|
int type; /* interval entry/exit */
|
|
};
|
|
|
|
/*
|
|
* Association matching AM[] return codes
|
|
*/
|
|
#define AM_ERR -1 /* error */
|
|
#define AM_NOMATCH 0 /* no match */
|
|
#define AM_PROCPKT 1 /* server/symmetric packet */
|
|
#define AM_BCST 2 /* broadcast packet */
|
|
#define AM_FXMIT 3 /* client packet */
|
|
#define AM_MANYCAST 4 /* manycast packet */
|
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#define AM_NEWPASS 5 /* new passive */
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#define AM_NEWBCL 6 /* new broadcast */
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#define AM_POSSBCL 7 /* discard broadcast */
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/* NetInfo configuration locations */
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#ifdef HAVE_NETINFO
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#define NETINFO_CONFIG_DIR "/config/ntp"
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#endif
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#endif /* NTP_H */
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