1/* 2 * ntpd.h - Prototypes and external variables for ntpd. 3 * 4 * Note the first half is primarily function prototypes, type 5 * declarations, and preprocessor macros, with variables declared 6 * primarily in the second half. 7 * 8 * Each half is further divided into sections for each source file. 9 */ 10 11#include "ntp.h" 12#include "ntp_stdlib.h" 13#include "ntp_syslog.h" 14#include "ntp_debug.h" 15#include "ntp_syslog.h" 16#include "ntp_select.h" 17#include "ntp_malloc.h" 18#include "ntp_refclock.h" 19#include "ntp_intres.h" 20#include "recvbuff.h" 21 22/* 23 * First half: ntpd types, functions, macros 24 * ----------------------------------------- 25 */ 26 27/* 28 * macro for debugging output - cut down on #ifdef pollution. 29 * 30 * DPRINTF() is for use by ntpd only, and compiles away to nothing 31 * without DEBUG (configure --disable-debugging). 32 * 33 * TRACE() is similar for libntp and utilities, which retain full 34 * debug capability even when compiled without DEBUG. 35 * 36 * The calling convention is not attractive: 37 * DPRINTF(debuglevel, (fmt, ...)); 38 * DPRINTF(2, ("shows #ifdef DEBUG and if debug >= %d\n", 2)); 39 */ 40#ifdef DEBUG 41# define DPRINTF(lvl, arg) \ 42 do { \ 43 if (debug >= (lvl)) \ 44 mprintf arg; \ 45 } while (0) 46#else 47# define DPRINTF(lvl, arg) do {} while (0) 48#endif 49 50/* clear bitflag only on DEBUG builds */ 51#ifdef DEBUG 52# define CLEAR_BIT_IF_DEBUG(bit, flags) \ 53 do { \ 54 (flags) &= ~(bit); \ 55 } while (FALSE) 56#else 57# define CLEAR_BIT_IF_DEBUG(bit, flags) \ 58 do {} while (FALSE) 59#endif 60 61 62/* nt_clockstuff.c */ 63#ifdef SYS_WINNT 64extern void win_time_stepped(void); 65#endif 66 67/* ntp_config.c */ 68#define TAI_1972 10 /* initial TAI offset (s) */ 69extern char *keysdir; /* crypto keys and leaptable directory */ 70extern char * saveconfigdir; /* ntpq saveconfig output directory */ 71 72extern void getconfig (int, char **); 73extern void ctl_clr_stats (void); 74extern int ctlclrtrap (sockaddr_u *, endpt *, int); 75extern u_short ctlpeerstatus (struct peer *); 76extern int ctlsettrap (sockaddr_u *, endpt *, int, int); 77extern u_short ctlsysstatus (void); 78extern void init_control (void); 79extern void process_control (struct recvbuf *, int); 80extern void report_event (int, struct peer *, const char *); 81extern int mprintf_event (int evcode, struct peer *p, 82 const char *fmt, ...) NTP_PRINTF(3, 4); 83 84/* ntp_control.c */ 85/* 86 * Structure for translation tables between internal system 87 * variable indices and text format. 88 */ 89struct ctl_var { 90 u_short code; 91 u_short flags; 92 const char *text; 93}; 94/* 95 * Flag values 96 */ 97#define CAN_READ 0x01 98#define CAN_WRITE 0x02 99 100#define DEF 0x20 101#define PADDING 0x40 102#define EOV 0x80 103 104#define RO (CAN_READ) 105#define WO (CAN_WRITE) 106#define RW (CAN_READ|CAN_WRITE) 107 108extern char * add_var (struct ctl_var **, u_long, u_short); 109extern void free_varlist (struct ctl_var *); 110extern void set_var (struct ctl_var **, const char *, u_long, u_short); 111extern void set_sys_var (const char *, u_long, u_short); 112extern const char * get_ext_sys_var(const char *tag); 113 114/* ntp_io.c */ 115typedef struct interface_info { 116 endpt * ep; 117 u_char action; 118} interface_info_t; 119 120typedef void (*interface_receiver_t) (void *, interface_info_t *); 121 122extern void interface_enumerate (interface_receiver_t, void *); 123extern endpt * getinterface (sockaddr_u *, u_int32); 124extern endpt * select_peerinterface (struct peer *, sockaddr_u *, 125 endpt *); 126extern endpt * findinterface (sockaddr_u *); 127extern endpt * findbcastinter (sockaddr_u *); 128extern void enable_broadcast (endpt *, sockaddr_u *); 129extern void enable_multicast_if (endpt *, sockaddr_u *); 130extern void interface_update (interface_receiver_t, void *); 131#ifndef HAVE_IO_COMPLETION_PORT 132extern void io_handler (void); 133#else 134extern void WINAPI ip_interface_changed(ULONG_PTR ctx); 135#endif 136extern void init_io (void); 137extern void io_open_sockets (void); 138extern void io_clr_stats (void); 139extern void io_setbclient (void); 140extern void io_unsetbclient (void); 141extern void io_multicast_add(sockaddr_u *); 142extern void io_multicast_del(sockaddr_u *); 143extern void sendpkt (sockaddr_u *dest, endpt * ep, int ttl, 144 struct pkt *pkt, int len); 145extern isc_boolean_t is_linklocal(sockaddr_u *psau); 146#ifdef DEBUG_TIMING 147extern void collect_timing (struct recvbuf *, const char *, int, l_fp *); 148#endif 149#ifdef HAVE_SIGNALED_IO 150extern void wait_for_signal (void); 151extern void unblock_io_and_alarm (void); 152extern void block_io_and_alarm (void); 153# define UNBLOCK_IO_AND_ALARM() unblock_io_and_alarm() 154# define BLOCK_IO_AND_ALARM() block_io_and_alarm() 155#else 156# define UNBLOCK_IO_AND_ALARM() do {} while (0) 157# define BLOCK_IO_AND_ALARM() do {} while (0) 158#endif 159#define eptoa(pif) localaddrtoa(pif) 160#define latoa(pif) eptoa(pif) 161extern const char * localaddrtoa(endpt *); 162#ifdef DEBUG 163extern const char * iflags_str(u_int32 iflags); 164#endif 165 166 167/* ntp_loopfilter.c */ 168extern void init_loopfilter(void); 169extern int local_clock(struct peer *, double); 170extern void adj_host_clock(void); 171extern void loop_config(int, double); 172extern void select_loop(int); 173extern void huffpuff(void); 174extern u_long sys_clocktime; 175extern u_int sys_tai; 176extern int freq_cnt; 177 178/* ntp_monitor.c */ 179#define MON_HASH_SIZE ((size_t)1U << mon_hash_bits) 180#define MON_HASH_MASK (MON_HASH_SIZE - 1) 181#define MON_HASH(addr) (sock_hash(addr) & MON_HASH_MASK) 182extern void init_mon (void); 183extern void mon_start (int); 184extern void mon_stop (int); 185extern u_short ntp_monitor (struct recvbuf *, u_short); 186extern void mon_clearinterface(endpt *interface); 187 188/* ntp_peer.c */ 189extern void init_peer (void); 190extern struct peer *findexistingpeer(sockaddr_u *, const char *, 191 struct peer *, int, u_char, int *); 192extern struct peer *findpeer (struct recvbuf *, int, int *); 193extern struct peer *findpeerbyassoc(associd_t); 194extern void set_peerdstadr (struct peer *, endpt *); 195extern struct peer *newpeer (sockaddr_u *, const char *, endpt *, 196 int, u_char, u_char, u_char, u_char, 197 u_int, u_char, u_int32, 198 keyid_t, const char *); 199extern void peer_all_reset (void); 200extern void peer_clr_stats (void); 201extern struct peer *peer_config(sockaddr_u *, const char *, endpt *, 202 int, u_char, u_char, u_char, u_char, 203 u_int, u_int32, 204 keyid_t, const char *); 205extern void peer_reset (struct peer *); 206extern void refresh_all_peerinterfaces(void); 207extern void unpeer (struct peer *); 208extern void clear_all (void); 209extern int score_all (struct peer *); 210extern struct peer *findmanycastpeer(struct recvbuf *); 211extern void peer_cleanup (void); 212 213/* ntp_crypto.c */ 214#ifdef AUTOKEY 215extern int crypto_recv (struct peer *, struct recvbuf *); 216extern int crypto_xmit (struct peer *, struct pkt *, 217 struct recvbuf *, int, 218 struct exten *, keyid_t); 219extern keyid_t session_key (sockaddr_u *, sockaddr_u *, keyid_t, 220 keyid_t, u_long); 221extern int make_keylist (struct peer *, endpt *); 222extern void key_expire (struct peer *); 223extern void crypto_update (void); 224extern void crypto_update_taichange(void); 225extern void crypto_config (int, char *); 226extern void crypto_setup (void); 227extern u_int crypto_ident (struct peer *); 228extern struct exten *crypto_args (struct peer *, u_int, associd_t, char *); 229extern int crypto_public (struct peer *, u_char *, u_int); 230extern void value_free (struct value *); 231extern char *iffpar_file; 232extern EVP_PKEY *iffpar_pkey; 233extern char *gqpar_file; 234extern EVP_PKEY *gqpar_pkey; 235extern char *mvpar_file; 236extern EVP_PKEY *mvpar_pkey; 237extern struct value tai_leap; 238#endif /* AUTOKEY */ 239 240/* ntp_proto.c */ 241extern void transmit (struct peer *); 242extern void receive (struct recvbuf *); 243extern void peer_clear (struct peer *, const char *); 244extern void process_packet (struct peer *, struct pkt *, u_int); 245extern void clock_select (void); 246extern void set_sys_leap (u_char); 247 248extern u_long leapsec; /* seconds to next leap (proximity class) */ 249extern int leapdif; /* TAI difference step at next leap second */ 250extern int sys_orphan; 251extern double sys_mindisp; 252extern double sys_maxdist; 253 254extern char *sys_ident; /* identity scheme */ 255extern void poll_update (struct peer *, u_char, u_char); 256 257extern void clear (struct peer *); 258extern void clock_filter (struct peer *, double, double, double); 259extern void init_proto (void); 260extern void set_sys_tick_precision(double); 261extern void proto_config (int, u_long, double, sockaddr_u *); 262extern void proto_clr_stats (void); 263 264/* ntp_refclock.c */ 265#ifdef REFCLOCK 266extern int refclock_newpeer (struct peer *); 267extern void refclock_unpeer (struct peer *); 268extern void refclock_receive (struct peer *); 269extern void refclock_transmit (struct peer *); 270extern void init_refclock (void); 271#endif /* REFCLOCK */ 272 273/* ntp_request.c */ 274extern void init_request (void); 275extern void process_private (struct recvbuf *, int); 276extern void reset_auth_stats(void); 277 278/* ntp_restrict.c */ 279extern void init_restrict (void); 280extern void restrictions (sockaddr_u *, r4addr *); 281extern int/*BOOL*/hack_restrict(restrict_op op, sockaddr_u *resaddr, 282 sockaddr_u *resmask, short ippeerlimit, 283 u_short mflags, u_short rflags, 284 u_int32 expire); 285extern void restrict_source (sockaddr_u *addr, int/*BOOL*/ remove, 286 u_int32 lifetime); 287#ifdef DEBUG 288extern void dump_restricts (void); 289extern const char *resop_str (restrict_op op); 290extern const char *rflags_str (u_short rflags); 291extern const char *mflags_str (u_short mflags); 292#endif 293 294 295/* ntp_timer.c */ 296extern void init_timer (void); 297extern void reinit_timer (void); 298extern void timer (void); 299extern void timer_clr_stats (void); 300extern int endpt_scan_period; /* -U option default 301s */ 301extern u_long endpt_scan_timer; /* next scan current_time */ 302extern u_long orphwait; /* orphan wait time */ 303#ifdef AUTOKEY 304extern char *sys_hostname; /* host name */ 305extern char *sys_groupname; /* group name */ 306extern char *group_name; /* group name */ 307extern u_char sys_revoke; /* keys revoke timeout */ 308extern u_char sys_automax; /* session key timeout */ 309#endif /* AUTOKEY */ 310 311/* ntp_util.c */ 312extern void init_util (void); 313extern void write_stats (void); 314extern void stats_config (int, const char *, int optflag); 315extern void record_peer_stats (sockaddr_u *, int, double, double, double, double); 316extern void record_proto_stats (char *); 317extern void record_loop_stats (double, double, double, double, int); 318extern void record_clock_stats (sockaddr_u *, const char *); 319extern int mprintf_clock_stats(sockaddr_u *, const char *, ...) 320 NTP_PRINTF(2, 3); 321extern void record_raw_stats (sockaddr_u *srcadr, sockaddr_u *dstadr, 322 l_fp *t1, l_fp *t2, l_fp *t3, l_fp *t4, 323 int leap, int version, int mode, 324 int stratum, int ppoll, int precision, 325 double root_delay, double root_dispersion, 326 u_int32 refid, int len, u_char *extra); 327extern void check_leap_file (int is_daily_check, u_int32 ntptime, const time_t * systime); 328extern void record_crypto_stats (sockaddr_u *, const char *); 329#ifdef DEBUG 330extern void record_timing_stats (const char *); 331extern void append_flagstr(char *flagstr, size_t sz, const char *text); 332#endif 333extern char * fstostr(time_t); /* NTP timescale seconds */ 334 335/* ntpd.c */ 336extern void parse_cmdline_opts(int *, char ***); 337 338/* ntservice.c */ 339#ifndef SYS_WINNT 340# define ntservice_isup() do {} while (FALSE) 341#endif 342 343/* 344 * Signals we catch for debugging. 345 */ 346#define MOREDEBUGSIG SIGUSR1 347#define LESSDEBUGSIG SIGUSR2 348/* 349 * Signals which terminate us gracefully. 350 */ 351#ifndef SYS_WINNT 352# define SIGDIE1 SIGHUP 353# define SIGDIE2 SIGINT 354# define SIGDIE3 SIGQUIT 355# define SIGDIE4 SIGTERM 356#endif /* SYS_WINNT */ 357 358 359/* 360 * Last half: ntpd variables 361 * ------------------------- 362 */ 363 364/* ntp_config.c */ 365extern char const * progname; 366extern int saved_argc; 367extern char **saved_argv; 368extern char *sys_phone[]; /* ACTS phone numbers */ 369#if defined(HAVE_SCHED_SETSCHEDULER) 370extern int config_priority_override; 371extern int config_priority; 372#endif 373extern char *ntp_signd_socket; 374extern struct config_tree_tag *cfg_tree_history; 375 376#ifdef BC_LIST_FRAMEWORK_NOT_YET_USED 377/* 378 * backwards compatibility flags 379 */ 380typedef struct bc_entry_tag { 381 int token; 382 int enabled; 383} bc_entry; 384 385extern bc_entry bc_list[]; 386#endif 387 388/* ntp_control.c */ 389extern int num_ctl_traps; 390extern keyid_t ctl_auth_keyid; /* keyid used for authenticating write requests */ 391 392/* 393 * Statistic counters to keep track of requests and responses. 394 */ 395extern u_long ctltimereset; /* time stats reset */ 396extern u_long numctlreq; /* number of requests we've received */ 397extern u_long numctlbadpkts; /* number of bad control packets */ 398extern u_long numctlresponses; /* number of resp packets sent with data */ 399extern u_long numctlfrags; /* number of fragments sent */ 400extern u_long numctlerrors; /* number of error responses sent */ 401extern u_long numctltooshort; /* number of too short input packets */ 402extern u_long numctlinputresp; /* number of responses on input */ 403extern u_long numctlinputfrag; /* number of fragments on input */ 404extern u_long numctlinputerr; /* number of input pkts with err bit set */ 405extern u_long numctlbadoffset; /* number of input pkts with nonzero offset */ 406extern u_long numctlbadversion; /* number of input pkts with unknown version */ 407extern u_long numctldatatooshort; /* data too short for count */ 408extern u_long numctlbadop; /* bad op code found in packet */ 409extern u_long numasyncmsgs; /* number of async messages we've sent */ 410 411/* 412 * Other statistics of possible interest 413 */ 414extern volatile u_long packets_dropped; /* total number of packets dropped on reception */ 415extern volatile u_long packets_ignored; /* packets received on wild card interface */ 416extern volatile u_long packets_received;/* total number of packets received */ 417extern u_long packets_sent; /* total number of packets sent */ 418extern u_long packets_notsent; /* total number of packets which couldn't be sent */ 419 420extern volatile u_long handler_calls; /* number of calls to interrupt handler */ 421extern volatile u_long handler_pkts; /* number of pkts received by handler */ 422extern u_long io_timereset; /* time counters were reset */ 423 424/* ntp_io.c */ 425extern int no_periodic_scan; /* no periodic net addr scans */ 426extern int scan_addrs_once; /* no net addr rescans */ 427extern int nonlocal_v4_addr_up; /* should we try IPv4 pool? */ 428extern int nonlocal_v6_addr_up; /* should we try IPv6 pool? */ 429extern u_int sys_ifnum; /* next .ifnum to assign */ 430extern endpt * any_interface; /* IPv4 wildcard */ 431extern endpt * any6_interface; /* IPv6 wildcard */ 432extern endpt * loopback_interface; /* IPv4 loopback for refclocks */ 433extern endpt * ep_list; /* linked list */ 434 435/* ntp_loopfilter.c */ 436extern double drift_comp; /* clock frequency (s/s) */ 437extern double clock_stability; /* clock stability (s/s) */ 438extern double clock_max_back; /* max backward offset before step (s) */ 439extern double clock_max_fwd; /* max forward offset before step (s) */ 440extern double clock_panic; /* max offset before panic (s) */ 441extern double clock_phi; /* dispersion rate (s/s) */ 442extern double clock_minstep; /* step timeout (s) */ 443extern double clock_codec; /* codec frequency */ 444#ifdef KERNEL_PLL 445extern int pll_status; /* status bits for kernel pll */ 446#endif /* KERNEL_PLL */ 447 448/* 449 * Clock state machine control flags 450 */ 451extern int ntp_enable; /* clock discipline enabled */ 452extern int pll_control; /* kernel support available */ 453extern int kern_enable; /* kernel support enabled */ 454extern int hardpps_enable; /* kernel PPS discipline enabled */ 455extern int ext_enable; /* external clock enabled */ 456extern int cal_enable; /* refclock calibrate enable */ 457extern int allow_panic; /* allow panic correction (-g) */ 458extern int enable_panic_check; /* Can we check allow_panic's state? */ 459extern int force_step_once; /* always step time once at startup (-G) */ 460extern int mode_ntpdate; /* exit on first clock set (-q) */ 461extern int peer_ntpdate; /* count of ntpdate peers */ 462 463/* 464 * Clock state machine variables 465 */ 466extern u_char sys_poll; /* system poll interval (log2 s) */ 467extern int state; /* clock discipline state */ 468extern int tc_counter; /* poll-adjust counter */ 469extern u_long last_time; /* time of last clock update (s) */ 470extern double last_offset; /* last clock offset (s) */ 471extern u_char allan_xpt; /* Allan intercept (log2 s) */ 472extern double clock_jitter; /* clock jitter (s) */ 473extern double sys_offset; /* system offset (s) */ 474extern double sys_jitter; /* system jitter (s) */ 475 476/* ntp_monitor.c */ 477extern u_char mon_hash_bits; /* log2 size of hash table */ 478extern mon_entry ** mon_hash; /* MRU hash table */ 479extern mon_entry mon_mru_list; /* mru listhead */ 480extern u_int mon_enabled; /* MON_OFF (0) or other MON_* */ 481extern u_int mru_alloc; /* mru list + free list count */ 482extern u_int mru_entries; /* mru list count */ 483extern u_int mru_peakentries; /* highest mru_entries */ 484extern u_int mru_initalloc; /* entries to preallocate */ 485extern u_int mru_incalloc; /* allocation batch factor */ 486extern u_int mru_mindepth; /* preempt above this */ 487extern int mru_maxage; /* for entries older than */ 488extern u_int mru_maxdepth; /* MRU size hard limit */ 489extern int mon_age; /* preemption limit */ 490 491/* ntp_peer.c */ 492extern struct peer *peer_hash[NTP_HASH_SIZE]; /* peer hash table */ 493extern int peer_hash_count[NTP_HASH_SIZE]; /* count of in each bucket */ 494extern struct peer *assoc_hash[NTP_HASH_SIZE]; /* association ID hash table */ 495extern int assoc_hash_count[NTP_HASH_SIZE];/* count of in each bucket */ 496extern struct peer *peer_list; /* peer structures list */ 497extern int peer_count; /* count in peer_list */ 498extern int peer_free_count; /* count in peer_free */ 499 500/* 501 * Miscellaneous statistic counters which may be queried. 502 */ 503extern u_long peer_timereset; /* time stat counters were zeroed */ 504extern u_long findpeer_calls; /* number of calls to findpeer */ 505extern u_long assocpeer_calls; /* number of calls to findpeerbyassoc */ 506extern u_long peer_allocations; /* number of allocations from the free list */ 507extern u_long peer_demobilizations; /* number of structs freed to free list */ 508extern int total_peer_structs; /* number of peer structs in circulation */ 509extern int peer_associations; /* mobilized associations */ 510extern int peer_preempt; /* preemptable associations */ 511 512/* ntp_proto.c */ 513/* 514 * System variables are declared here. See Section 3.2 of the 515 * specification. 516 */ 517extern u_char sys_leap; /* system leap indicator */ 518extern u_char sys_stratum; /* system stratum */ 519extern s_char sys_precision; /* local clock precision */ 520extern double sys_rootdelay; /* roundtrip delay to primary source */ 521extern double sys_rootdisp; /* dispersion to primary source */ 522extern u_int32 sys_refid; /* reference id */ 523extern l_fp sys_reftime; /* last update time */ 524extern struct peer *sys_peer; /* current peer */ 525 526/* 527 * Nonspecified system state variables. 528 */ 529extern int sys_bclient; /* we set our time to broadcasts */ 530extern int sys_mclient; /* we set our time to manycasts */ 531extern double sys_bdelay; /* broadcast client default delay */ 532extern int sys_authenticate; /* requre authentication for config */ 533extern l_fp sys_authdelay; /* authentication delay */ 534extern u_char sys_bcpollbstep; /* broadcast poll backstep gate */ 535extern u_long sys_epoch; /* last clock update time */ 536extern keyid_t sys_private; /* private value for session seed */ 537extern int sys_manycastserver; /* respond to manycast client pkts */ 538extern int sys_maxclock; /* maximum survivors */ 539extern int sys_minclock; /* minimum survivors */ 540extern int sys_minsane; /* minimum candidates */ 541extern int sys_floor; /* cluster stratum floor */ 542extern int sys_ceiling; /* cluster stratum ceiling */ 543extern u_char sys_ttl[MAX_TTL]; /* ttl mapping vector */ 544extern u_int sys_ttlmax; /* max ttl mapping vector index */ 545 546/* 547 * Statistics counters 548 */ 549extern u_long sys_badauth; /* bad authentication */ 550extern u_long sys_badlength; /* bad length or format */ 551extern u_long sys_declined; /* declined */ 552extern u_long sys_kodsent; /* KoD sent */ 553extern u_long sys_lamport; /* Lamport violation */ 554extern u_long sys_limitrejected; /* rate exceeded */ 555extern u_long sys_newversion; /* current version */ 556extern u_long sys_oldversion; /* old version */ 557extern u_long sys_processed; /* packets for this host */ 558extern u_long sys_received; /* packets received */ 559extern u_long sys_restricted; /* access denied */ 560extern u_long sys_stattime; /* time since reset */ 561extern u_long sys_tsrounding; /* timestamp rounding errors */ 562 563/* ntp_request.c */ 564extern keyid_t info_auth_keyid; /* keyid used to authenticate requests */ 565extern u_long auth_timereset; 566 567/* ntp_restrict.c */ 568extern restrict_u * restrictlist4; /* IPv4 restriction list */ 569extern restrict_u * restrictlist6; /* IPv6 restriction list */ 570extern int ntp_minpkt; 571extern u_char ntp_minpoll; 572 573/* ntp_scanner.c */ 574extern u_int32 conf_file_sum; /* Simple sum of characters */ 575 576/* ntp_signd.c */ 577#ifdef HAVE_NTP_SIGND 578extern void send_via_ntp_signd(struct recvbuf *, int, keyid_t, int, 579 struct pkt *); 580#endif 581 582/* ntp_timer.c */ 583extern volatile int alarm_flag; /* alarm flag */ 584extern volatile u_long alarm_overflow; 585extern u_long current_time; /* seconds since startup */ 586extern u_long timer_timereset; 587extern u_long timer_overflows; 588extern u_long timer_xmtcalls; 589extern int leap_sec_in_progress; 590#ifdef LEAP_SMEAR 591extern struct leap_smear_info leap_smear; 592extern int leap_smear_intv; 593#endif 594#ifdef SYS_WINNT 595HANDLE WaitableTimerHandle; 596#endif 597 598/* ntp_util.c */ 599extern char statsdir[MAXFILENAME]; 600extern int stats_control; /* write stats to fileset? */ 601extern int stats_write_period; /* # of seconds between writes. */ 602extern double stats_write_tolerance; 603extern double wander_threshold; 604 605/* ntpd.c */ 606extern int nofork; /* no-fork flag */ 607extern int initializing; /* initializing flag */ 608#ifdef HAVE_DROPROOT 609extern int droproot; /* flag: try to drop root privileges after startup */ 610extern int root_dropped; /* root has been dropped */ 611extern char *user; /* user to switch to */ 612extern char *group; /* group to switch to */ 613extern const char *chrootdir; /* directory to chroot() to */ 614#endif 615#ifdef HAVE_WORKING_FORK 616extern int daemon_pipe[2]; /* startup monitoring */ 617#endif 618 619/* ntservice.c */ 620#ifdef SYS_WINNT 621extern int accept_wildcard_if_for_winnt; 622#endif 623 624/* refclock_conf.c */ 625#ifdef REFCLOCK 626/* refclock configuration table */ 627extern struct refclock * const refclock_conf[]; 628extern u_char num_refclock_conf; 629#endif 630 631