home *** CD-ROM | disk | FTP | other *** search
- /*
- * ntp.h - NTP definitions for the masses
- */
-
- #ifndef _NETUSER_H
- #include "netuser.h"
- #endif
-
- #ifndef _UDP_H
- #include "udp.h"
- #endif
-
- #ifndef _TIMER_H
- #include "timer.h"
- #endif
-
- /*
- * How to get signed characters. On machines where signed char works,
- * use it. On machines where signed char doesn't work, char had better
- * be signed.
- */
- #if defined(NO_SIGNED_CHAR_DECL)
- typedef char s_char;
- #else
- typedef signed char s_char;
- #endif
-
- /*
- * ntohs, etc., are not part of NOS. Rather than hack all the ntp code
- * to use the equivalents in NOS, I have put the functions into ntp_util.c
- */
- extern int16 htons __ARGS((int16));
- extern int16 ntohs __ARGS((int16));
- extern int32 htonl __ARGS((int32));
- extern int32 ntohl __ARGS((int32));
-
- /*
- * NOS does not include bzero() either.
- * Use a macro to fix that.
- */
- #include <mem.h>
- #define bzero(b, length) memset(b, 0, length)
- #define bcopy(src, dest, length) memmove(dest, src, length)
-
- /*
- * NTP protocol parameters. See section 3.2.6 of the specification.
- */
- #define NTP_VERSION 2 /* current version number */
- #define NTP_OLDVERSION 1 /* previous version number */
- #define NTP_PORT 123 /* included for sake of non-unix machines */
- #define NTP_INFIN 15 /* max stratum, infinity a la Bellman-Ford */
- #define NTP_MAXAGE 86400L /* one day in seconds */
- #define NTP_MAXSKW 0x28f /* 0.01 sec in fp format */
- #define NTP_MINDIST 0x51f /* 0.02 sec in fp format */
- #define NTP_MINPOLL 6 /* actually 1<<6, or 64 sec */
- #define NTP_MAXPOLL 10 /* actually 1<<10, or 1024 sec */
- #define NTP_WINDOW 8 /* reachability register size */
- #define NTP_MAXWGT (8*FP_SECOND) /* maximum select weight 8 seconds */
- #define NTP_MAXLIST 5 /* maximum select list size */
- #define NTP_MAXSTRA 2 /* maximum number of stata in select list */
- #define NTP_SELECT (3*(256/4)) /* select weight, see code */
- #define NTP_MAXKEY 65535 /* maximum authentication key number */
-
- #define PEER_SHIFT 8 /* 8 suitable for crystal time base */
- #define PEER_MAXDISP (64*FP_SECOND) /* maximum dispersion (fp 64) */
- #define PEER_THRESHOLD (FP_SECOND>>1) /* filter threshold (0.5 seconds) */
- #define PEER_FILTER 1 /* filter weight (actually 1>>1) */
- #define PEER_MAXDSPDEL (FP_SECOND>>3) /* maximum delay disp (0.125 seconds */
-
-
- /*
- * Loop filter parameters. See section 5.1 of the specification.
- *
- * Note that these are appropriate for a crystal time base. If your
- * system clock is line frequency controlled you should read the
- * specification for appropriate modifications. Note that the
- * loop filter code will have to change if you change CLOCK_MAX
- * to be greater than or equal to 500 ms.
- */
- #define CLOCK_UPDATE 8 /* update interval: 64 seconds */
- #define CLOCK_ADJ 2 /* adjustment interval: 4 seconds */
- #define CLOCK_FREQ 10 /* frequency weight: 2**10 */
- #define CLOCK_PHASE 8 /* phase weight: 2**8 */
- #define CLOCK_TRACK 8 /* compliance weight: 2**8 */
- #define CLOCK_COMP 4 /* compliance maximum: 2**4 */
- #define CLOCK_FACTOR 18 /* compliance factor: 2**18 */
-
- #define CLOCK_MAX_F 0x20c49ba6L /* 128 ms, in time stamp format */
- #define CLOCK_MAX_I 0x0 /* both fractional and integral parts */
-
- #define CLOCK_WAYTOOBIG 1000 /* if clock 1000 sec off, forget it */
-
- /*
- * Unspecified default. sys.precision defaults to -6 unless otherwise
- * adjusted.
- */
- #define DEFAULT_SYS_PRECISION (-6)
-
-
- #if 0 /* Use NOS timers instead. */
- /*
- * Event timers are actually implemented as a sorted queue of expiry
- * times. The queue is slotted, with each slot holding timers which
- * expire in a 2**(NTP_MINPOLL-1) (32) second period. The timers in
- * each slot are sorted by increasing expiry time. The number of
- * slots is 2**(NTP_MAXPOLL-(NTP_MINPOLL-1)), or 32, to cover a time
- * period of 2**NTP_MAXPOLL (1024) seconds into the future before
- * wrapping.
- */
-
- struct event {
- struct event *next; /* next in chain */
- struct event *prev; /* previous in chain */
- struct peer *peer; /* peer this counter belongs to */
- void (*event_handler)(); /* routine to call to handle event */
- u_long event_time; /* expiry time of counter */
- };
-
- #define TIMER_SLOTTIME (1<<(NTP_MINPOLL-1))
- #define TIMER_NSLOTS (1<<(NTP_MAXPOLL-(NTP_MINPOLL-1)))
- #define TIMER_SLOT(t) (((t) >> (NTP_MINPOLL-1)) & (TIMER_NSLOTS-1))
-
- /*
- * TIMER_ENQUEUE() puts stuff on the timer queue. It takes as
- * arguments (ea), an array of event slots, and (iev), the event
- * to be inserted. This one searches the hash bucket from the
- * end, and is about optimum for the timing requirements of
- * NTP peers.
- */
- #define TIMER_ENQUEUE(ea, iev) \
- do { \
- register struct event *ev; \
- \
- ev = (ea)[TIMER_SLOT((iev)->event_time)].prev; \
- while (ev->event_time > (iev)->event_time) \
- ev = ev->prev; \
- (iev)->prev = ev; \
- (iev)->next = ev->next; \
- (ev)->next->prev = (iev); \
- (ev)->next = (iev); \
- } while(0)
-
- /*
- * TIMER_INSERT() also puts stuff on the timer queue, but searches the
- * bucket from the top. This is better for things that do very short
- * time outs, like clock support.
- */
- #define TIMER_INSERT(ea, iev) \
- do { \
- register struct event *ev; \
- \
- ev = (ea)[TIMER_SLOT((iev)->event_time)].next; \
- while (ev->event_time != 0 && \
- ev->event_time < (iev)->event_time) \
- ev = ev->next; \
- (iev)->next = ev; \
- (iev)->prev = ev->prev; \
- (ev)->prev->next = (iev); \
- (ev)->prev = (iev); \
- } while(0)
-
- /*
- * Remove an event from the queue.
- */
- #define TIMER_DEQUEUE(ev) \
- do { \
- if ((ev)->next != 0) { \
- (ev)->next->prev = (ev)->prev; \
- (ev)->prev->next = (ev)->next; \
- (ev)->next = (ev)->prev = 0; \
- } \
- } while (0)
-
- #endif /* 0 */
-
- #define EVENT_TIMEOUT CLOCK_ADJ
- /* Convert from seconds to NOS ticks. Assumes that MSPTICK << 1000. */
- #define SEC2TICKS(sec) ( ((int32)(sec)) * (1000L / MSPTICK) )
-
- /*
- * XXX
- * xntpd's current_time variable replaced by calls to NOS' secclock().
- */
- #define current_time (secclock())
-
- /*
- * The interface structure is used to hold the addresses and socket
- * numbers of each of the interfaces we are using.
- */
- struct interface {
- struct sockaddr_in sin; /* sock address in network byte order */
- struct socket sock; /* socket this is opened on */
- struct udp_cb *cb; /* UDP control block */
- struct sockaddr_in bcast; /* bcast socket in network byte order */
- struct socket bsock; /* broadcast socket. */
- struct sockaddr_in mask; /* interface mask */
- char name[8]; /* name of interface */
- int flags; /* interface flags */
- long received; /* number of incoming packets */
- long sent; /* number of outgoing packets */
- long notsent; /* number of send failures */
- };
-
- /*
- * Flags for interfaces
- */
- #define INT_BROADCAST 1 /* can broadcast out this interface */
- #define INT_BCASTOPEN 2 /* broadcast socket is open */
- #define INT_LOOPBACK 4 /* the loopback interface */
-
-
- /*
- * The peer structure. Holds state information relating to the guys
- * we are peering with. Most of this stuff is from section 3.2 of the
- * spec.
- */
- struct peer {
- struct peer *next;
- struct peer *ass_next; /* link pointer in associd hash */
- struct sockaddr_in srcadr; /* address of remote host */
- struct interface *dstadr; /* pointer to address on local host */
- u_char leap; /* leap indicator */
- u_char hmode; /* association mode with this peer */
- u_char pmode; /* peer's association mode */
- u_char stratum; /* stratum of remote peer */
- u_char ppoll; /* peer polling interval */
- s_char precision; /* peer's clock precision */
- u_char hpoll; /* local host's poll interval */
- u_char version; /* version indicator (XXX delete) */
- u_char reach; /* reachability, NTP_WINDOW bits */
- u_char flags; /* peer flags */
- u_char refclktype; /* reference clock type */
- u_char refclkunit; /* reference clock unit number */
- u_fp distance; /* distance from primary clock */
- u_fp dispersion; /* peer clock dispersion */
- u_long refid; /* peer reference ID */
- l_fp reftime; /* time of peer's last update */
- struct timer event_timer; /* NOS timer structure. */
- u_long keyid; /* encription key ID */
- u_long pkeyid; /* keyid used to encrypt last message */
- u_short associd; /* association ID, a unique integer */
- u_char unused;
- /* **Start of clear-to-zero area.*** */
- /* Everything that is cleared to zero goes below here */
- u_char valid; /* valid counter */
- #define clear_to_zero valid
- u_char trust; /* trust, PEER_SHIFT bits */
- u_char unreach; /* unreachable count */
- u_short filter_nextpt; /* index into filter shift register */
- u_fp filter_delay[PEER_SHIFT]; /* delay part of shift register */
- l_fp filter_offset[PEER_SHIFT]; /* offset part of shift register */
- s_fp filter_soffset[PEER_SHIFT]; /* offset in s_fp format, for disp */
- l_fp org; /* originate time stamp */
- l_fp rec; /* receive time stamp */
- l_fp xmt; /* transmit time stamp */
- /* ***End of clear-to-zero area.*** */
- /* Everything that is cleared to zero goes above here */
- u_char filter_order[PEER_SHIFT]; /* we keep the filter sorted here */
- #define end_clear_to_zero filter_order[0]
- u_fp estdelay; /* filter estimated delay */
- u_fp estdisp; /* filter estimated dispersion */
- l_fp estoffset; /* filter estimated clock offset */
- s_fp estsoffset; /* fp version of above */
-
- /*
- * Stuff related to the experimental broadcast delay
- * determination code. The registers will probably go away
- * later.
- */
- u_long estbdelay; /* broadcast delay, as a ts fraction */
- u_long filter_bdelay[PEER_SHIFT]; /* broadcast delay registers */
- u_short bdel_next; /* where the next sample goes */
- u_short bdel_ticks; /* countdown to next transmission */
- u_long bdel_time; /* time to start next poll */
-
- /*
- * statistic counters
- */
- u_long timereset; /* time stat counters were reset */
- u_long sent; /* number of updates sent */
- u_long received; /* number of frames received */
- u_long timereceived; /* last time a frame received */
- u_long timereachable; /* last reachable/unreachable event */
- u_long badlength; /* number of funny length packets */
- u_long processed; /* processed by the protocol */
- u_long badauth; /* bad credentials detected */
- u_long bogusorg; /* rejected due to bogus origin */
- u_long oldpkt; /* rejected as duplicate packet */
- u_long baddelay; /* reject due to bad delay */
- u_long seldelaytoolarge; /* too long a delay for selection */
- u_long seldisptoolarge; /* too much dispersion for selection */
- u_long selbroken; /* broken NTP detected in selection */
- u_long seltooold; /* too long since sync in selection */
- u_long untrustable; /* not selected because not trustable */
- u_char candidate; /* position after candidate selection */
- u_char falseticker; /* position before falseticker sel */
- u_char select; /* position at end of falseticker sel */
- u_char select_total; /* number of peers in selection */
- u_char was_sane; /* set to 1 if it passed sanity check */
- u_char last_event; /* set to code for last peer error */
- u_char num_events; /* num. of events which have occurred */
- };
-
- /*
- * Values for peer.leap, sys_leap
- */
- #define LEAP_NOWARNING 0x0 /* normal, no leap second warning */
- #define LEAP_ADDSECOND 0x1 /* last minute of day has 61 seconds */
- #define LEAP_DELSECOND 0x2 /* last minute of day has 59 seconds */
- #define LEAP_NOTINSYNC 0x3 /* overload, clock is free running */
-
- /*
- * Values for peer.mode
- */
- #define MODE_UNSPEC 0 /* unspecified (probably old NTP version) */
- #define MODE_ACTIVE 1 /* symmetric active */
- #define MODE_PASSIVE 2 /* symmetric passive */
- #define MODE_CLIENT 3 /* client mode */
- #define MODE_SERVER 4 /* server mode */
- #define MODE_BROADCAST 5 /* broadcast mode */
- #define MODE_CONTROL 6 /* control mode packet */
- #define MODE_PRIVATE 7 /* implementation defined function */
-
- #define MODE_BCLIENT 8 /* a pseudo mode, used internally */
-
-
- /*
- * Values for peer.stratum, sys_stratum
- */
- #define STRATUM_REFCLOCK 0 /* stratum claimed by primary clock */
- #define STRATUM_PRIMARY 1 /* host has a primary clock */
- #define STRATUM_INFIN NTP_INFIN /* infinity a la Bellman-Ford */
- /* A stratum of 0 in the packet is mapped to 16 internally */
- #define STRATUM_PKT_UNSPEC 0 /* unspecified in packet */
- #define STRATUM_UNSPEC (NTP_INFIN+1) /* unspecified */
-
- /*
- * Values for peer.flags
- */
- #define FLAG_CONFIG 0x1 /* association was configured */
- #define FLAG_AUTHENABLE 0x2 /* this guy needs authentication */
- #define FLAG_MINPOLL 0x4 /* keep polling interval minimized */
- #define FLAG_DEFBDELAY 0x8 /* using default bdelay */
- #define FLAG_AUTHENTIC 0x10 /* last message was authentic */
- #define FLAG_REFCLOCK 0x20 /* this is actually a reference clock */
-
- /*
- * Definitions for the clear() routine. We use bzero() to clear
- * the parts of the peer structure which go to zero. These are
- * used to calculate the start address and length of the area.
- */
- #define CLEAR_TO_ZERO(p) ((char *)&((p)->clear_to_zero))
- #define END_CLEAR_TO_ZERO(p) ((char *)&((p)->end_clear_to_zero))
- #define LEN_CLEAR_TO_ZERO (END_CLEAR_TO_ZERO((struct peer *)0) \
- - CLEAR_TO_ZERO((struct peer *)0))
-
- /*
- * Reference clock types. Added as necessary.
- */
- #define REFCLK_NONE 0
- #define REFCLK_LOCALCLOCK 1
- #define REFCLK_WWV_HEATH 2
- #define REFCLK_WWV_PST 3
- #define REFCLK_WWVB_SPECTRACOM 4
- #define REFCLK_GOES_TRUETIME 5
- #define REFCLK_GOES_TRAK 6
- #define REFCLK_CHU 7
-
- /*
- * 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 0x7f7f0000L /* 127.127.0.0 */
- #define REFCLOCK_MASK 0xffff0000L /* 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 ((u_long)0x7f000001)
- #define LOOPNETMASK ((u_long)0xff000000)
-
- #define ISBADADR(srcadr) (((SRCADR(srcadr) & LOOPNETMASK) \
- == (LOOPBACKADR & LOOPNETMASK)) \
- && (SRCADR(srcadr) != LOOPBACKADR))
-
- /*
- * Utilities for manipulating addresses and port numbers
- */
- #define NSRCADR(src) ((src)->sin_addr.s_addr) /* address in net byte order */
- #define NSRCPORT(src) ((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 */
-
- /*
- * NTP packet format. The mac field is optional. It isn't really
- * an l_fp either, but for now declaring it that way is convenient.
- * See Appendix A in the specification.
- *
- * Note that all u_fp and l_fp values arrive in network byte order
- * and must be converted (except the mac, which isn't, really).
- */
- struct pkt {
- u_char li_vn_mode; /* contains leap indicator, version and mode */
- u_char stratum; /* peer's stratum */
- u_char ppoll; /* the peer polling interval */
- s_char precision; /* peer clock precision */
- u_fp distance; /* distance to primary clock */
- u_fp dispersion; /* clock dispersion */
- u_long 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 */
- u_long keyid; /* key identification */
- l_fp mac; /* message-authentication code */
- };
-
- /*
- * Packets can come in two flavours, one with a mac and one without.
- * These are their lengths.
- */
- #define MAC_LEN (sizeof(l_fp) + sizeof(u_long))
- #define LEN_PKT_MAC sizeof(struct pkt)
- #define LEN_PKT_NOMAC (sizeof(struct pkt) - MAC_LEN)
-
- /*
- * Stuff for extracting things from li_vn_mode
- */
- #define PKT_MODE(li_vn_mode) ((li_vn_mode) & 0x7)
- #define PKT_VERSION(li_vn_mode) (((li_vn_mode) >> 3) & 0x7)
- #define PKT_LEAP(li_vn_mode) (((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) (((s) == STRATUM_PKT_UNSPEC) ?\
- (STRATUM_UNSPEC) : (s))
-
- #define STRATUM_TO_PKT(s) (((s) == (STRATUM_UNSPEC)) ?\
- (STRATUM_PKT_UNSPEC) : (s))
-
- /*
- * Format of a recvbuf. These are used by the asynchronous receive
- * routine to store incoming packets and related information.
- */
- #define RX_BUFF_SIZE (120)
- struct recvbuf {
- struct recvbuf *next; /* next buffer in chain */
- union {
- struct sockaddr_in X_recv_srcadr;
- caddr_t X_recv_srcclock;
- } X_from_where;
- #define recv_srcadr X_from_where.X_recv_srcadr
- #define recv_srcclock X_from_where.X_recv_srcclock
- /* struct sockaddr_in srcadr;*/ /* where packet came from */
- struct interface *dstadr; /* interface datagram arrived thru */
- l_fp recv_time; /* time of arrival */
- void (*receiver)(); /* routine to receive buffer */
- int recv_length; /* number of octets received */
- union {
- struct pkt X_recv_pkt;
- char X_recv_buffer[RX_BUFF_SIZE];
- } recv_space;
- #define recv_pkt recv_space.X_recv_pkt
- #define recv_buffer recv_space.X_recv_buffer
- };
-
-
- /*
- * Event codes. Used for reporting errors/events to the control module
- */
- #define PEER_EVENT 0x80 /* this is a peer event */
-
- #define EVNT_UNSPEC 0
- #define EVNT_SYSRESTART 1
- #define EVNT_SYSFAULT 2
- #define EVNT_SYNCCHG 3
- #define EVNT_PEERSTCHG 4
- #define EVNT_CLOCKRESET 5
- #define EVNT_BADDATETIM 6
- #define EVNT_CLOCKEXCPT 7
-
- #define EVNT_PEERIPERR (1|PEER_EVENT)
- #define EVNT_PEERAUTH (2|PEER_EVENT)
- #define EVNT_UNREACH (3|PEER_EVENT)
- #define EVNT_REACH (4|PEER_EVENT)
- #define EVNT_PEERCLOCK (5|PEER_EVENT)
- #define EVNT_PEERSTRAT (6|PEER_EVENT)
-
- /*
- * Clock event codes
- */
- #define CEVNT_NOMINAL 0
- #define CEVNT_TIMEOUT 1
- #define CEVNT_BADREPLY 2
- #define CEVNT_FAULT 3
- #define CEVNT_PROP 4
- #define CEVNT_BADDATE 5
- #define CEVNT_BADTIME 6
-
- /*
- * Very misplaced value. Default port through which we send traps.
- */
- #define TRAPPORT 18447
-
-
- /*
- * To speed lookups, peers are hashed by the low order bits of the remote
- * IP address. These definitions relate to that.
- */
- #define HASH_SIZE 32
- #define HASH_MASK (HASH_SIZE-1)
- #define HASH_ADDR(src) ((SRCADR((src))^(SRCADR((src))>>8)) & HASH_MASK)
-
-
- /*
- * The poll update procedure takes an extra argument which controls
- * how a random perturbation is applied to peer.timer. The choice is
- * to not randomize at all, to randomize only if we're going to update
- * peer.timer, and to randomize no matter what (almost, the algorithm
- * is that we apply the random value if it is less than the current
- * timer count).
- */
- #define POLL_NOTRANDOM 0 /* don't randomize */
- #define POLL_RANDOMCHANGE 1 /* if you change, change randomly */
- #define POLL_MAKERANDOM 2 /* randomize next interval */
-
-
- /*
- * How we randomize polls. The poll interval is a power of two.
- * We chose a random value which is between 1/4 and 3/4 of the
- * poll interval we would normally use and which is an even multiple
- * of the EVENT_TIMEOUT. The random number routine, given an argument
- * spread value of n, returns an integer between 0 and (1<<n)-1. This
- * is shifted by EVENT_TIMEOUT and added to the base value.
- */
- #define RANDOM_SPREAD(poll) ((poll) - (EVENT_TIMEOUT+1))
- #define RANDOM_POLL(poll, rval) ((((rval)+1)<<EVENT_TIMEOUT) + (1<<((poll)-2)))
-
- /*
- * min, min3 and max. Makes it easier to transliterate the spec without
- * thinking about it.
- */
- #define min(a,b) (((a) < (b)) ? (a) : (b))
- #define max(a,b) (((a) > (b)) ? (a) : (b))
- #define min3(a,b,c) min(min((a),(b)), (c))
-
-
- /*
- * Configuration items. These are for the protocol module (proto_config())
- */
- #define PROTO_BROADCLIENT 1
- #define PROTO_PRECISION 2
- #define PROTO_AUTHENTICATE 3
- #define PROTO_BROADDELAY 4
- #define PROTO_AUTHDELAY 5
- #define PROTO_MAXSKEW 6
- #define PROTO_SELECT 7
-
- /*
- * Configuration items for the loop filter
- */
- #define LOOP_DRIFTCOMP 1
-
- /*
- * Configuration items for the stats printer
- */
- #define STATS_FREQ_FILE 1
- #define STATS_FREQ 2
-
- /*
- * Default parameters. We use these in the absense of something better.
- */
- #define DEFPRECISION (-5) /* conservatively low */
- #define DEFBROADDELAY (0x020c49baL) /* 8 ms. This is round trip delay */
-
-
- #ifdef XNTP_MONITOR
- /*
- * 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 *hash_prev; /* previous 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 lasttime; /* last time data updated */
- u_long firsttime; /* time structure initialized */
- u_long count; /* count we have seen */
- u_long rmtadr; /* address of remote host */
- u_short rmtport; /* remote port last came from */
- u_char mode; /* mode of incoming packet */
- u_char version; /* version of incoming packet */
- };
- #endif /* XNTP_MONITOR */
-
- /*
- * Structure used for restrictlist entries
- */
- struct restrictlist {
- struct restrictlist *next; /* link to next entry */
- u_long addr; /* host address (host byte order) */
- u_long mask; /* mask for address (host byte order) */
- u_long count; /* number of packets matched */
- u_short flags; /* accesslist flags */
- u_short mflags; /* match flags */
- };
-
- /*
- * Access flags
- */
- #define RES_IGNORE 0x1 /* ignore if matched */
- #define RES_DONTSERVE 0x2 /* don't give him any time */
- #define RES_DONTTRUST 0x4 /* don't trust if matched */
- #define RES_NOQUERY 0x8 /* don't allow queries if matched */
- #define RES_NOMODIFY 0x10 /* don't allow him to modify server */
- #define RES_NOPEER 0x20 /* don't allocate memory resources */
- #define RES_NOTRAP 0x40 /* don't allow him to set traps */
- #define RES_LPTRAP 0x80 /* traps set by him are low priority */
-
- #define RES_ALLFLAGS \
- (RES_IGNORE|RES_DONTSERVE|RES_DONTTRUST|RES_NOQUERY\
- |RES_NOMODIFY|RES_NOPEER|RES_NOTRAP|RES_LPTRAP)
-
- /*
- * Match flags
- */
- #define RESM_INTERFACE 0x1 /* this is an interface */
- #define RESM_NTPONLY 0x2 /* match ntp port only */
-
- /*
- * Restriction configuration ops
- */
- #define RESTRICT_FLAGS 1 /* add flags to restrict entry */
- #define RESTRICT_UNFLAG 2 /* remove flags from restrict entry */
- #define RESTRICT_REMOVE 3 /* remove a restrict entry */
-
-
- /*
- * Experimental alternate selection algorithm identifiers
- */
- #define SELECT_1 1
- #define SELECT_2 2
- #define SELECT_3 3
- #define SELECT_4 4
- #define SELECT_5 5
-