1 /* 2 * ntp.h - NTP definitions for the masses 3 */ 4 #ifndef NTP_H 5 #define NTP_H 6 7 #include <stddef.h> 8 #include <math.h> 9 10 #include <ntp_fp.h> 11 #include <ntp_types.h> 12 #include <ntp_lists.h> 13 #include <ntp_stdlib.h> 14 #include <ntp_crypto.h> 15 #include <ntp_random.h> 16 #include <ntp_net.h> 17 18 #include <isc/boolean.h> 19 20 /* 21 * Calendar arithmetic - contributed by G. Healton 22 */ 23 #define YEAR_BREAK 500 /* years < this are tm_year values: 24 * Break < AnyFourDigitYear && Break > 25 * Anytm_yearYear */ 26 27 #define YEAR_PIVOT 98 /* 97/98: years < this are year 2000+ 28 * FYI: official UNIX pivot year is 29 * 68/69 */ 30 31 /* 32 * Number of Days since 1 BC Gregorian to 1 January of given year 33 */ 34 #define julian0(year) (((year) * 365 ) + ((year) > 0 ? (((year) + 3) \ 35 / 4 - ((year - 1) / 100) + ((year - 1) / \ 36 400)) : 0)) 37 38 /* 39 * Number of days since start of NTP time to 1 January of given year 40 */ 41 #define ntp0(year) (julian0(year) - julian0(1900)) 42 43 /* 44 * Number of days since start of UNIX time to 1 January of given year 45 */ 46 #define unix0(year) (julian0(year) - julian0(1970)) 47 48 /* 49 * LEAP YEAR test for full 4-digit years (e.g, 1999, 2010) 50 */ 51 #define isleap_4(y) ((y) % 4 == 0 && !((y) % 100 == 0 && !(y % \ 52 400 == 0))) 53 54 /* 55 * LEAP YEAR test for tm_year (struct tm) years (e.g, 99, 110) 56 */ 57 #define isleap_tm(y) ((y) % 4 == 0 && !((y) % 100 == 0 && !(((y) \ 58 + 1900) % 400 == 0))) 59 60 /* 61 * to convert simple two-digit years to tm_year style years: 62 * 63 * if (year < YEAR_PIVOT) 64 * year += 100; 65 * 66 * to convert either two-digit OR tm_year years to four-digit years: 67 * 68 * if (year < YEAR_PIVOT) 69 * year += 100; 70 * 71 * if (year < YEAR_BREAK) 72 * year += 1900; 73 */ 74 75 /* 76 * How to get signed characters. On machines where signed char works, 77 * use it. On machines where signed char doesn't work, char had better 78 * be signed. 79 */ 80 #ifdef NEED_S_CHAR_TYPEDEF 81 # if SIZEOF_SIGNED_CHAR 82 typedef signed char s_char; 83 # else 84 typedef char s_char; 85 # endif 86 /* XXX: Why is this sequent bit INSIDE this test? */ 87 # ifdef sequent 88 # undef SO_RCVBUF 89 # undef SO_SNDBUF 90 # endif 91 #endif 92 93 /* 94 * NTP protocol parameters. See section 3.2.6 of the specification. 95 */ 96 #define NTP_VERSION ((u_char)4) /* current version number */ 97 #define NTP_OLDVERSION ((u_char)1) /* oldest credible version */ 98 #define NTP_PORT 123 /* included for non-unix machines */ 99 100 /* 101 * Poll interval parameters 102 */ 103 #define NTP_UNREACH 10 /* poll unreach threshold */ 104 #define NTP_MINPOLL 3 /* log2 min poll interval (8 s) */ 105 #define NTP_MINDPOLL 6 /* log2 default min poll (64 s) */ 106 #define NTP_MAXDPOLL 10 /* log2 default max poll (~17 m) */ 107 #define NTP_MAXPOLL 17 /* log2 max poll interval (~36 h) */ 108 #define NTP_RETRY 3 /* max packet retries */ 109 #define NTP_MINPKT 2 /* guard time (s) */ 110 111 /* 112 * Clock filter algorithm tuning parameters 113 */ 114 #define MAXDISPERSE 16. /* max dispersion */ 115 #define NTP_SHIFT 8 /* clock filter stages */ 116 #define NTP_FWEIGHT .5 /* clock filter weight */ 117 118 /* 119 * Selection algorithm tuning parameters 120 */ 121 #define NTP_MINCLOCK 3 /* min survivors */ 122 #define NTP_MAXCLOCK 10 /* max candidates */ 123 #define MINDISPERSE .001 /* min distance */ 124 #define MAXDISTANCE 1.5 /* max root distance (select threshold) */ 125 #define CLOCK_SGATE 3. /* popcorn spike gate */ 126 #define HUFFPUFF 900 /* huff-n'-puff sample interval (s) */ 127 #define MAXHOP 2 /* anti-clockhop threshold */ 128 #define MAX_TTL 8 /* max ttl mapping vector size */ 129 #define BEACON 7200 /* manycast beacon interval */ 130 #define NTP_MAXEXTEN 2048 /* max extension field size */ 131 #define NTP_ORPHWAIT 300 /* orphan wair (s) */ 132 133 /* 134 * Miscellaneous stuff 135 */ 136 #define NTP_MAXKEY 65535 /* max authentication key number */ 137 #define KEY_TYPE_MD5 NID_md5 /* MD5 digest NID */ 138 /* 139 * Limits of things 140 */ 141 #define MAXFILENAME 256 /* max length of file name */ 142 #define MAXHOSTNAME 512 /* max length of host/node name */ 143 #define NTP_MAXSTRLEN 256 /* max string length */ 144 145 /* 146 * Operations for jitter calculations (these use doubles). 147 * 148 * Note that we carefully separate the jitter component from the 149 * dispersion component (frequency error plus precision). The frequency 150 * error component is computed as CLOCK_PHI times the difference between 151 * the epoch of the time measurement and the reference time. The 152 * precision component is computed as the square root of the mean of the 153 * squares of a zero-mean, uniform distribution of unit maximum 154 * amplitude. Whether this makes statistical sense may be arguable. 155 */ 156 #define SQUARE(x) ((x) * (x)) 157 #define SQRT(x) (sqrt(x)) 158 #define DIFF(x, y) (SQUARE((x) - (y))) 159 #define LOGTOD(a) ldexp(1., (int)(a)) /* log2 to double */ 160 #define UNIVAR(x) (SQUARE(.28867513 * LOGTOD(x))) /* std uniform distr */ 161 #define ULOGTOD(a) ldexp(1., (int)(a)) /* ulog2 to double */ 162 163 #define EVENT_TIMEOUT 0 /* one second, that is */ 164 165 166 /* 167 * The interface structure is used to hold the addresses and socket 168 * numbers of each of the local network addresses we are using. 169 * Because "interface" is a reserved word in C++ and has so many 170 * varied meanings, a change to "endpt" (via typedef) is under way. 171 * Eventually the struct tag will change from interface to endpt_tag. 172 * endpt is unrelated to the select algorithm's struct endpoint. 173 */ 174 typedef struct interface endpt; 175 struct interface { 176 endpt * elink; /* endpt list link */ 177 endpt * mclink; /* per-AF_* multicast list */ 178 void * ioreg_ctx; /* IO registration context */ 179 SOCKET fd; /* socket descriptor */ 180 SOCKET bfd; /* for receiving broadcasts */ 181 u_int32 ifnum; /* endpt instance count */ 182 sockaddr_u sin; /* unicast address */ 183 sockaddr_u mask; /* subnet mask */ 184 sockaddr_u bcast; /* broadcast address */ 185 char name[32]; /* name of interface */ 186 u_short family; /* AF_INET/AF_INET6 */ 187 u_short phase; /* phase in update cycle */ 188 u_int32 flags; /* interface flags */ 189 int last_ttl; /* last TTL specified */ 190 u_int32 addr_refid; /* IPv4 addr or IPv6 hash */ 191 int num_mcast; /* mcast addrs enabled */ 192 u_long starttime; /* current_time at creation */ 193 volatile long received; /* number of incoming packets */ 194 long sent; /* number of outgoing packets */ 195 long notsent; /* number of send failures */ 196 u_int ifindex; /* for IPV6_MULTICAST_IF */ 197 isc_boolean_t ignore_packets; /* listen-read-drop this? */ 198 struct peer * peers; /* list of peers using endpt */ 199 u_int peercnt; /* count of same */ 200 }; 201 202 /* 203 * Flags for interfaces 204 */ 205 #define INT_UP 0x001 /* Interface is up */ 206 #define INT_PPP 0x002 /* Point-to-point interface */ 207 #define INT_LOOPBACK 0x004 /* the loopback interface */ 208 #define INT_BROADCAST 0x008 /* can broadcast out this interface */ 209 #define INT_MULTICAST 0x010 /* can multicast out this interface */ 210 #define INT_BCASTOPEN 0x020 /* broadcast receive socket is open */ 211 #define INT_MCASTOPEN 0x040 /* multicasting enabled */ 212 #define INT_WILDCARD 0x080 /* wildcard interface - usually skipped */ 213 #define INT_MCASTIF 0x100 /* bound directly to MCAST address */ 214 #define INT_PRIVACY 0x200 /* RFC 4941 IPv6 privacy address */ 215 #define INT_BCASTXMIT 0x400 /* socket setup to allow broadcasts */ 216 217 /* 218 * Define flasher bits (tests 1 through 11 in packet procedure) 219 * These reveal the state at the last grumble from the peer and are 220 * most handy for diagnosing problems, even if not strictly a state 221 * variable in the spec. These are recorded in the peer structure. 222 * 223 * Packet errors 224 */ 225 #define TEST1 0X0001 /* duplicate packet */ 226 #define TEST2 0x0002 /* bogus packet */ 227 #define TEST3 0x0004 /* protocol unsynchronized */ 228 #define TEST4 0x0008 /* access denied */ 229 #define TEST5 0x0010 /* bad authentication */ 230 #define TEST6 0x0020 /* bad synch or stratum */ 231 #define TEST7 0x0040 /* bad header */ 232 #define TEST8 0x0080 /* bad autokey */ 233 #define TEST9 0x0100 /* bad crypto */ 234 #define PKT_TEST_MASK (TEST1 | TEST2 | TEST3 | TEST4 | TEST5 |\ 235 TEST6 | TEST7 | TEST8 | TEST9) 236 /* 237 * Peer errors 238 */ 239 #define TEST10 0x0200 /* peer bad synch or stratum */ 240 #define TEST11 0x0400 /* peer distance exceeded */ 241 #define TEST12 0x0800 /* peer synchronization loop */ 242 #define TEST13 0x1000 /* peer unreacable */ 243 #define PEER_TEST_MASK (TEST10 | TEST11 | TEST12 | TEST13) 244 245 /* 246 * Unused flags 247 */ 248 #define TEST14 0x2000 249 #define TEST15 0x4000 250 #define TEST16 0x8000 251 252 /* 253 * The peer structure. Holds state information relating to the guys 254 * we are peering with. Most of this stuff is from section 3.2 of the 255 * spec. 256 */ 257 struct peer { 258 struct peer *p_link; /* link pointer in free & peer lists */ 259 struct peer *adr_link; /* link pointer in address hash */ 260 struct peer *aid_link; /* link pointer in associd hash */ 261 struct peer *ilink; /* list of peers for interface */ 262 sockaddr_u srcadr; /* address of remote host */ 263 char * hostname; /* if non-NULL, remote name */ 264 struct addrinfo *addrs; /* hostname query result */ 265 struct addrinfo *ai; /* position within addrs */ 266 endpt * dstadr; /* local address */ 267 associd_t associd; /* association ID */ 268 u_char version; /* version number */ 269 u_char hmode; /* local association mode */ 270 u_char hpoll; /* local poll interval */ 271 u_char minpoll; /* min poll interval */ 272 u_char maxpoll; /* max poll interval */ 273 u_int flags; /* association flags */ 274 u_char cast_flags; /* additional flags */ 275 u_char last_event; /* last peer error code */ 276 u_char num_events; /* number of error events */ 277 u_int32 ttl; /* ttl/refclock mode */ 278 char *ident; /* group identifier name */ 279 280 /* 281 * Variables used by reference clock support 282 */ 283 #ifdef REFCLOCK 284 struct refclockproc *procptr; /* refclock structure pointer */ 285 u_char refclktype; /* reference clock type */ 286 u_char refclkunit; /* reference clock unit number */ 287 u_char sstclktype; /* clock type for system status word */ 288 #endif /* REFCLOCK */ 289 290 /* 291 * Variables set by received packet 292 */ 293 u_char leap; /* local leap indicator */ 294 u_char pmode; /* remote association mode */ 295 u_char stratum; /* remote stratum */ 296 u_char ppoll; /* remote poll interval */ 297 s_char precision; /* remote clock precision */ 298 double rootdelay; /* roundtrip delay to primary source */ 299 double rootdisp; /* dispersion to primary source */ 300 u_int32 refid; /* remote reference ID */ 301 l_fp reftime; /* update epoch */ 302 303 /* 304 * Variables used by authenticated client 305 */ 306 keyid_t keyid; /* current key ID */ 307 #ifdef AUTOKEY 308 #define clear_to_zero opcode 309 u_int32 opcode; /* last request opcode */ 310 associd_t assoc; /* peer association ID */ 311 u_int32 crypto; /* peer status word */ 312 EVP_PKEY *pkey; /* public key */ 313 const EVP_MD *digest; /* message digest algorithm */ 314 char *subject; /* certificate subject name */ 315 char *issuer; /* certificate issuer name */ 316 struct cert_info *xinfo; /* issuer certificate */ 317 keyid_t pkeyid; /* previous key ID */ 318 keyid_t hcookie; /* host cookie */ 319 keyid_t pcookie; /* peer cookie */ 320 const struct pkey_info *ident_pkey; /* identity key */ 321 BIGNUM *iffval; /* identity challenge (IFF, GQ, MV) */ 322 const BIGNUM *grpkey; /* identity challenge key (GQ) */ 323 struct value cookval; /* receive cookie values */ 324 struct value recval; /* receive autokey values */ 325 struct exten *cmmd; /* extension pointer */ 326 u_long refresh; /* next refresh epoch */ 327 328 /* 329 * Variables used by authenticated server 330 */ 331 keyid_t *keylist; /* session key ID list */ 332 int keynumber; /* current key number */ 333 struct value encrypt; /* send encrypt values */ 334 struct value sndval; /* send autokey values */ 335 #else /* !AUTOKEY follows */ 336 #define clear_to_zero status 337 #endif /* !AUTOKEY */ 338 339 /* 340 * Ephemeral state variables 341 */ 342 u_char status; /* peer status */ 343 u_char new_status; /* under-construction status */ 344 u_char reach; /* reachability register */ 345 int flash; /* protocol error test tally bits */ 346 u_long epoch; /* reference epoch */ 347 int burst; /* packets remaining in burst */ 348 int retry; /* retry counter */ 349 int flip; /* interleave mode control */ 350 int filter_nextpt; /* index into filter shift register */ 351 double filter_delay[NTP_SHIFT]; /* delay shift register */ 352 double filter_offset[NTP_SHIFT]; /* offset shift register */ 353 double filter_disp[NTP_SHIFT]; /* dispersion shift register */ 354 u_long filter_epoch[NTP_SHIFT]; /* epoch shift register */ 355 u_char filter_order[NTP_SHIFT]; /* filter sort index */ 356 l_fp rec; /* receive time stamp */ 357 l_fp xmt; /* transmit time stamp */ 358 l_fp dst; /* destination timestamp */ 359 l_fp aorg; /* origin timestamp */ 360 l_fp borg; /* alternate origin timestamp */ 361 l_fp bxmt; /* most recent broadcast transmit timestamp */ 362 double offset; /* peer clock offset */ 363 double delay; /* peer roundtrip delay */ 364 double jitter; /* peer jitter (squares) */ 365 double disp; /* peer dispersion */ 366 double xleave; /* interleave delay */ 367 double bias; /* programmed offset bias */ 368 369 /* 370 * Variables used to correct for packet length and asymmetry. 371 */ 372 double t21; /* outbound packet delay */ 373 int t21_bytes; /* outbound packet length */ 374 int t21_last; /* last outbound packet length */ 375 double r21; /* outbound data rate */ 376 double t34; /* inbound packet delay */ 377 int t34_bytes; /* inbound packet length */ 378 double r34; /* inbound data rate */ 379 380 /* 381 * End of clear-to-zero area 382 */ 383 u_long update; /* receive epoch */ 384 #define end_clear_to_zero update 385 int unreach; /* watchdog counter */ 386 int throttle; /* rate control */ 387 u_long outdate; /* send time last packet */ 388 u_long nextdate; /* send time next packet */ 389 390 /* 391 * Statistic counters 392 */ 393 u_long timereset; /* time stat counters were reset */ 394 u_long timelastrec; /* last packet received time, incl. trash */ 395 u_long timereceived; /* last (clean) packet received time */ 396 u_long timereachable; /* last reachable/unreachable time */ 397 398 u_long sent; /* packets sent */ 399 u_long received; /* packets received */ 400 u_long processed; /* packets processed */ 401 u_long badauth; /* bad authentication (TEST5) */ 402 u_long badNAK; /* invalid crypto-NAK */ 403 u_long bogusorg; /* bogus origin (TEST2, TEST3) */ 404 u_long oldpkt; /* old duplicate (TEST1) */ 405 u_long seldisptoolarge; /* bad header (TEST6, TEST7) */ 406 u_long selbroken; /* KoD received */ 407 }; 408 409 /* 410 * Values for peer.leap, sys_leap 411 */ 412 #define LEAP_NOWARNING 0x0 /* normal, no leap second warning */ 413 #define LEAP_ADDSECOND 0x1 /* last minute of day has 61 seconds */ 414 #define LEAP_DELSECOND 0x2 /* last minute of day has 59 seconds */ 415 #define LEAP_NOTINSYNC 0x3 /* overload, clock is free running */ 416 417 /* 418 * Values for peer mode and packet mode. Only the modes through 419 * MODE_BROADCAST and MODE_BCLIENT appear in the transition 420 * function. MODE_CONTROL and MODE_PRIVATE can appear in packets, 421 * but those never survive to the transition function. 422 */ 423 #define MODE_UNSPEC 0 /* unspecified (old version) */ 424 #define MODE_ACTIVE 1 /* symmetric active mode */ 425 #define MODE_PASSIVE 2 /* symmetric passive mode */ 426 #define MODE_CLIENT 3 /* client mode */ 427 #define MODE_SERVER 4 /* server mode */ 428 #define MODE_BROADCAST 5 /* broadcast mode */ 429 /* 430 * These can appear in packets 431 */ 432 #define MODE_CONTROL 6 /* control mode */ 433 #define MODE_PRIVATE 7 /* private mode */ 434 /* 435 * This is a made-up mode for broadcast client. 436 */ 437 #define MODE_BCLIENT 6 /* broadcast client mode */ 438 439 /* 440 * Values for peer.stratum, sys_stratum 441 */ 442 #define STRATUM_REFCLOCK ((u_char)0) /* default stratum */ 443 /* A stratum of 0 in the packet is mapped to 16 internally */ 444 #define STRATUM_PKT_UNSPEC ((u_char)0) /* unspecified in packet */ 445 #define STRATUM_UNSPEC ((u_char)16) /* unspecified */ 446 447 /* 448 * Values for peer.flags (u_int) 449 */ 450 #define FLAG_CONFIG 0x0001 /* association was configured */ 451 #define FLAG_PREEMPT 0x0002 /* preemptable association */ 452 #define FLAG_AUTHENTIC 0x0004 /* last message was authentic */ 453 #define FLAG_REFCLOCK 0x0008 /* this is actually a reference clock */ 454 #define FLAG_BC_VOL 0x0010 /* broadcast client volleying */ 455 #define FLAG_PREFER 0x0020 /* prefer peer */ 456 #define FLAG_BURST 0x0040 /* burst mode */ 457 #define FLAG_PPS 0x0080 /* steered by PPS */ 458 #define FLAG_IBURST 0x0100 /* initial burst mode */ 459 #define FLAG_NOSELECT 0x0200 /* never select */ 460 #define FLAG_TRUE 0x0400 /* force truechimer */ 461 #define FLAG_SKEY 0x0800 /* autokey authentication */ 462 #define FLAG_XLEAVE 0x1000 /* interleaved protocol */ 463 #define FLAG_XB 0x2000 /* interleaved broadcast */ 464 #define FLAG_XBOGUS 0x4000 /* interleaved bogus packet */ 465 #ifdef OPENSSL 466 # define FLAG_ASSOC 0x8000 /* autokey request */ 467 #endif /* OPENSSL */ 468 #define FLAG_TSTAMP_PPS 0x10000 /* PPS source provides absolute timestamp */ 469 470 /* 471 * Definitions for the clear() routine. We use memset() to clear 472 * the parts of the peer structure which go to zero. These are 473 * used to calculate the start address and length of the area. 474 */ 475 #define CLEAR_TO_ZERO(p) ((char *)&((p)->clear_to_zero)) 476 #define END_CLEAR_TO_ZERO(p) ((char *)&((p)->end_clear_to_zero)) 477 #define LEN_CLEAR_TO_ZERO(p) (END_CLEAR_TO_ZERO(p) - CLEAR_TO_ZERO(p)) 478 #define CRYPTO_TO_ZERO(p) ((char *)&((p)->clear_to_zero)) 479 #define END_CRYPTO_TO_ZERO(p) ((char *)&((p)->end_clear_to_zero)) 480 #define LEN_CRYPTO_TO_ZERO (END_CRYPTO_TO_ZERO((struct peer *)0) \ 481 - CRYPTO_TO_ZERO((struct peer *)0)) 482 483 /* 484 * Reference clock types. Added as necessary. 485 */ 486 #define REFCLK_NONE 0 /* unknown or missing */ 487 #define REFCLK_LOCALCLOCK 1 /* external (e.g., lockclock) */ 488 #define REFCLK_GPS_TRAK 2 /* TRAK 8810 GPS Receiver */ 489 #define REFCLK_WWV_PST 3 /* PST/Traconex 1020 WWV/H */ 490 #define REFCLK_SPECTRACOM 4 /* Spectracom (generic) Receivers */ 491 #define REFCLK_TRUETIME 5 /* TrueTime (generic) Receivers */ 492 #define REFCLK_IRIG_AUDIO 6 /* IRIG-B/W audio decoder */ 493 #define REFCLK_CHU_AUDIO 7 /* CHU audio demodulator/decoder */ 494 #define REFCLK_PARSE 8 /* generic driver (usually DCF77,GPS,MSF) */ 495 #define REFCLK_GPS_MX4200 9 /* Magnavox MX4200 GPS */ 496 #define REFCLK_GPS_AS2201 10 /* Austron 2201A GPS */ 497 #define REFCLK_GPS_ARBITER 11 /* Arbiter 1088A/B/ GPS */ 498 #define REFCLK_IRIG_TPRO 12 /* KSI/Odetics TPRO-S IRIG */ 499 #define REFCLK_ATOM_LEITCH 13 /* Leitch CSD 5300 Master Clock */ 500 #define REFCLK_MSF_EES 14 /* EES M201 MSF Receiver */ 501 #define REFCLK_GPSTM_TRUE 15 /* OLD TrueTime GPS/TM-TMD Receiver */ 502 #define REFCLK_IRIG_BANCOMM 16 /* Bancomm GPS/IRIG Interface */ 503 #define REFCLK_GPS_DATUM 17 /* Datum Programmable Time System */ 504 #define REFCLK_ACTS 18 /* Generic Auto Computer Time Service */ 505 #define REFCLK_WWV_HEATH 19 /* Heath GC1000 WWV/WWVH Receiver */ 506 #define REFCLK_GPS_NMEA 20 /* NMEA based GPS clock */ 507 #define REFCLK_GPS_VME 21 /* TrueTime GPS-VME Interface */ 508 #define REFCLK_ATOM_PPS 22 /* 1-PPS Clock Discipline */ 509 #define REFCLK_PTB_ACTS 23 /* replaced by REFCLK_ACTS */ 510 #define REFCLK_USNO 24 /* replaced by REFCLK_ACTS */ 511 #define REFCLK_GPS_HP 26 /* HP 58503A Time/Frequency Receiver */ 512 #define REFCLK_ARCRON_MSF 27 /* ARCRON MSF radio clock. */ 513 #define REFCLK_SHM 28 /* clock attached thru shared memory */ 514 #define REFCLK_PALISADE 29 /* Trimble Navigation Palisade GPS */ 515 #define REFCLK_ONCORE 30 /* Motorola UT Oncore GPS */ 516 #define REFCLK_GPS_JUPITER 31 /* Rockwell Jupiter GPS receiver */ 517 #define REFCLK_CHRONOLOG 32 /* Chrono-log K WWVB receiver */ 518 #define REFCLK_DUMBCLOCK 33 /* Dumb localtime clock */ 519 #define REFCLK_ULINK 34 /* Ultralink M320 WWVB receiver */ 520 #define REFCLK_PCF 35 /* Conrad parallel port radio clock */ 521 #define REFCLK_WWV_AUDIO 36 /* WWV/H audio demodulator/decoder */ 522 #define REFCLK_FG 37 /* Forum Graphic GPS */ 523 #define REFCLK_HOPF_SERIAL 38 /* hopf DCF77/GPS serial receiver */ 524 #define REFCLK_HOPF_PCI 39 /* hopf DCF77/GPS PCI receiver */ 525 #define REFCLK_JJY 40 /* JJY receiver */ 526 #define REFCLK_TT560 41 /* TrueTime 560 IRIG-B decoder */ 527 #define REFCLK_ZYFER 42 /* Zyfer GPStarplus receiver */ 528 #define REFCLK_RIPENCC 43 /* RIPE NCC Trimble driver */ 529 #define REFCLK_NEOCLOCK4X 44 /* NeoClock4X DCF77 or TDF receiver */ 530 #define REFCLK_TSYNCPCI 45 /* Spectracom TSYNC PCI timing board */ 531 #define REFCLK_GPSDJSON 46 532 #define REFCLK_MAX 46 533 534 535 /* 536 * NTP packet format. The mac field is optional. It isn't really 537 * an l_fp either, but for now declaring it that way is convenient. 538 * See Appendix A in the specification. 539 * 540 * Note that all u_fp and l_fp values arrive in network byte order 541 * and must be converted (except the mac, which isn't, really). 542 */ 543 struct pkt { 544 u_char li_vn_mode; /* peer leap indicator */ 545 u_char stratum; /* peer stratum */ 546 u_char ppoll; /* peer poll interval */ 547 s_char precision; /* peer clock precision */ 548 u_fp rootdelay; /* roundtrip delay to primary source */ 549 u_fp rootdisp; /* dispersion to primary source*/ 550 u_int32 refid; /* reference id */ 551 l_fp reftime; /* last update time */ 552 l_fp org; /* originate time stamp */ 553 l_fp rec; /* receive time stamp */ 554 l_fp xmt; /* transmit time stamp */ 555 556 #define MIN_V4_PKT_LEN (12 * sizeof(u_int32)) /* min header length */ 557 #define LEN_PKT_NOMAC (12 * sizeof(u_int32)) /* min header length */ 558 #define MIN_MAC_LEN (1 * sizeof(u_int32)) /* crypto_NAK */ 559 #define MAX_MD5_LEN (5 * sizeof(u_int32)) /* MD5 */ 560 #define MAX_MAC_LEN (6 * sizeof(u_int32)) /* SHA */ 561 #define KEY_MAC_LEN sizeof(u_int32) /* key ID in MAC */ 562 #define MAX_MDG_LEN (MAX_MAC_LEN-KEY_MAC_LEN) /* max. digest len */ 563 564 /* 565 * The length of the packet less MAC must be a multiple of 64 566 * with an RSA modulus and Diffie-Hellman prime of 256 octets 567 * and maximum host name of 128 octets, the maximum autokey 568 * command is 152 octets and maximum autokey response is 460 569 * octets. A packet can contain no more than one command and one 570 * response, so the maximum total extension field length is 864 571 * octets. But, to handle humungus certificates, the bank must 572 * be broke. 573 * 574 * The different definitions of the 'exten' field are here for 575 * the benefit of applications that want to send a packet from 576 * an auto variable in the stack - not using the AUTOKEY version 577 * saves 2KB of stack space. The receive buffer should ALWAYS be 578 * big enough to hold a full extended packet if the extension 579 * fields have to be parsed or skipped. 580 */ 581 #ifdef AUTOKEY 582 u_int32 exten[(NTP_MAXEXTEN + MAX_MAC_LEN) / sizeof(u_int32)]; 583 #else /* !AUTOKEY follows */ 584 u_int32 exten[(MAX_MAC_LEN) / sizeof(u_int32)]; 585 #endif /* !AUTOKEY */ 586 }; 587 588 /* 589 * Stuff for extracting things from li_vn_mode 590 */ 591 #define PKT_MODE(li_vn_mode) ((u_char)((li_vn_mode) & 0x7)) 592 #define PKT_VERSION(li_vn_mode) ((u_char)(((li_vn_mode) >> 3) & 0x7)) 593 #define PKT_LEAP(li_vn_mode) ((u_char)(((li_vn_mode) >> 6) & 0x3)) 594 595 /* 596 * Stuff for putting things back into li_vn_mode in packets and vn_mode 597 * in ntp_monitor.c's mon_entry. 598 */ 599 #define VN_MODE(v, m) ((((v) & 7) << 3) | ((m) & 0x7)) 600 #define PKT_LI_VN_MODE(l, v, m) ((((l) & 3) << 6) | VN_MODE((v), (m))) 601 602 603 /* 604 * Dealing with stratum. 0 gets mapped to 16 incoming, and back to 0 605 * on output. 606 */ 607 #define PKT_TO_STRATUM(s) ((u_char)(((s) == (STRATUM_PKT_UNSPEC)) ?\ 608 (STRATUM_UNSPEC) : (s))) 609 610 #define STRATUM_TO_PKT(s) ((u_char)(((s) == (STRATUM_UNSPEC)) ?\ 611 (STRATUM_PKT_UNSPEC) : (s))) 612 613 614 /* 615 * A test to determine if the refid should be interpreted as text string. 616 * This is usually the case for a refclock, which has stratum 0 internally, 617 * which results in sys_stratum 1 if the refclock becomes system peer, or 618 * in case of a kiss-of-death (KoD) packet that has STRATUM_PKT_UNSPEC (==0) 619 * in the packet which is converted to STRATUM_UNSPEC when the packet 620 * is evaluated. 621 */ 622 #define REFID_ISTEXT(s) (((s) <= 1) || ((s) >= STRATUM_UNSPEC)) 623 624 625 /* 626 * Event codes. Used for reporting errors/events to the control module 627 */ 628 #define PEER_EVENT 0x080 /* this is a peer event */ 629 #define CRPT_EVENT 0x100 /* this is a crypto event */ 630 631 /* 632 * System event codes 633 */ 634 #define EVNT_UNSPEC 0 /* unspecified */ 635 #define EVNT_NSET 1 /* freq not set */ 636 #define EVNT_FSET 2 /* freq set */ 637 #define EVNT_SPIK 3 /* spike detect */ 638 #define EVNT_FREQ 4 /* freq mode */ 639 #define EVNT_SYNC 5 /* clock sync */ 640 #define EVNT_SYSRESTART 6 /* restart */ 641 #define EVNT_SYSFAULT 7 /* panic stop */ 642 #define EVNT_NOPEER 8 /* no sys peer */ 643 #define EVNT_ARMED 9 /* leap armed */ 644 #define EVNT_DISARMED 10 /* leap disarmed */ 645 #define EVNT_LEAP 11 /* leap event */ 646 #define EVNT_CLOCKRESET 12 /* clock step */ 647 #define EVNT_KERN 13 /* kernel event */ 648 #define EVNT_TAI 14 /* TAI */ 649 #define EVNT_LEAPVAL 15 /* stale leapsecond values */ 650 651 /* 652 * Peer event codes 653 */ 654 #define PEVNT_MOBIL (1 | PEER_EVENT) /* mobilize */ 655 #define PEVNT_DEMOBIL (2 | PEER_EVENT) /* demobilize */ 656 #define PEVNT_UNREACH (3 | PEER_EVENT) /* unreachable */ 657 #define PEVNT_REACH (4 | PEER_EVENT) /* reachable */ 658 #define PEVNT_RESTART (5 | PEER_EVENT) /* restart */ 659 #define PEVNT_REPLY (6 | PEER_EVENT) /* no reply */ 660 #define PEVNT_RATE (7 | PEER_EVENT) /* rate exceeded */ 661 #define PEVNT_DENY (8 | PEER_EVENT) /* access denied */ 662 #define PEVNT_ARMED (9 | PEER_EVENT) /* leap armed */ 663 #define PEVNT_NEWPEER (10 | PEER_EVENT) /* sys peer */ 664 #define PEVNT_CLOCK (11 | PEER_EVENT) /* clock event */ 665 #define PEVNT_AUTH (12 | PEER_EVENT) /* bad auth */ 666 #define PEVNT_POPCORN (13 | PEER_EVENT) /* popcorn */ 667 #define PEVNT_XLEAVE (14 | PEER_EVENT) /* interleave mode */ 668 #define PEVNT_XERR (15 | PEER_EVENT) /* interleave error */ 669 670 /* 671 * Clock event codes 672 */ 673 #define CEVNT_NOMINAL 0 /* unspecified */ 674 #define CEVNT_TIMEOUT 1 /* no reply */ 675 #define CEVNT_BADREPLY 2 /* bad format */ 676 #define CEVNT_FAULT 3 /* fault */ 677 #define CEVNT_PROP 4 /* bad signal */ 678 #define CEVNT_BADDATE 5 /* bad date */ 679 #define CEVNT_BADTIME 6 /* bad time */ 680 #define CEVNT_MAX CEVNT_BADTIME 681 682 /* 683 * Very misplaced value. Default port through which we send traps. 684 */ 685 #define TRAPPORT 18447 686 687 688 /* 689 * To speed lookups, peers are hashed by the low order bits of the 690 * remote IP address. These definitions relate to that. 691 */ 692 #define NTP_HASH_SIZE 128 693 #define NTP_HASH_MASK (NTP_HASH_SIZE-1) 694 #define NTP_HASH_ADDR(src) (sock_hash(src) & NTP_HASH_MASK) 695 696 /* 697 * min, min3 and max. Makes it easier to transliterate the spec without 698 * thinking about it. 699 */ 700 #define min(a,b) (((a) < (b)) ? (a) : (b)) 701 #define max(a,b) (((a) > (b)) ? (a) : (b)) 702 #define min3(a,b,c) min(min((a),(b)), (c)) 703 704 705 /* 706 * Configuration items. These are for the protocol module (proto_config()) 707 */ 708 #define PROTO_BROADCLIENT 1 709 #define PROTO_PRECISION 2 /* (not used) */ 710 #define PROTO_AUTHENTICATE 3 711 #define PROTO_BROADDELAY 4 712 #define PROTO_AUTHDELAY 5 /* (not used) */ 713 #define PROTO_MULTICAST_ADD 6 714 #define PROTO_MULTICAST_DEL 7 715 #define PROTO_NTP 8 716 #define PROTO_KERNEL 9 717 #define PROTO_MONITOR 10 718 #define PROTO_FILEGEN 11 719 #define PROTO_PPS 12 720 #define PROTO_CAL 13 721 #define PROTO_MINCLOCK 14 722 #define PROTO_MAXCLOCK 15 723 #define PROTO_MINSANE 16 724 #define PROTO_FLOOR 17 725 #define PROTO_CEILING 18 726 #define PROTO_COHORT 19 727 #define PROTO_CALLDELAY 20 728 #define PROTO_MINDISP 21 729 #define PROTO_MAXDIST 22 730 /* available 23 */ 731 #define PROTO_MAXHOP 24 732 #define PROTO_BEACON 25 733 #define PROTO_ORPHAN 26 734 #define PROTO_ORPHWAIT 27 735 #define PROTO_MODE7 28 736 #define PROTO_UECRYPTO 29 737 #define PROTO_UECRYPTONAK 30 738 #define PROTO_UEDIGEST 31 739 #define PROTO_PCEDIGEST 32 740 #define PROTO_BCPOLLBSTEP 33 741 742 /* 743 * Configuration items for the loop filter 744 */ 745 #define LOOP_DRIFTINIT 1 /* iniitialize frequency */ 746 #define LOOP_KERN_CLEAR 2 /* set initial frequency offset */ 747 #define LOOP_MAX 3 /* set both step offsets */ 748 #define LOOP_MAX_BACK 4 /* set backward-step offset */ 749 #define LOOP_MAX_FWD 5 /* set forward-step offset */ 750 #define LOOP_PANIC 6 /* set panic offseet */ 751 #define LOOP_PHI 7 /* set dispersion rate */ 752 #define LOOP_MINSTEP 8 /* set step timeout */ 753 #define LOOP_MINPOLL 9 /* set min poll interval (log2 s) */ 754 #define LOOP_ALLAN 10 /* set minimum Allan intercept */ 755 #define LOOP_HUFFPUFF 11 /* set huff-n'-puff filter length */ 756 #define LOOP_FREQ 12 /* set initial frequency */ 757 #define LOOP_CODEC 13 /* set audio codec frequency */ 758 #define LOOP_LEAP 14 /* insert leap after second 23:59 */ 759 #define LOOP_TICK 15 /* sim. low precision clock */ 760 761 /* 762 * Configuration items for the stats printer 763 */ 764 #define STATS_FREQ_FILE 1 /* configure drift file */ 765 #define STATS_STATSDIR 2 /* directory prefix for stats files */ 766 #define STATS_PID_FILE 3 /* configure ntpd PID file */ 767 #define STATS_LEAP_FILE 4 /* configure ntpd leapseconds file */ 768 769 #define MJD_1900 15020 /* MJD for 1 Jan 1900 */ 770 771 /* 772 * Default parameters. We use these in the absence of something better. 773 */ 774 #define INADDR_NTP 0xe0000101 /* NTP multicast address 224.0.1.1 */ 775 776 /* 777 * Structure used optionally for monitoring when this is turned on. 778 */ 779 typedef struct mon_data mon_entry; 780 struct mon_data { 781 mon_entry * hash_next; /* next structure in hash list */ 782 DECL_DLIST_LINK(mon_entry, mru);/* MRU list link pointers */ 783 struct interface * lcladr; /* address on which this arrived */ 784 l_fp first; /* first time seen */ 785 l_fp last; /* last time seen */ 786 int leak; /* leaky bucket accumulator */ 787 int count; /* total packet count */ 788 u_short flags; /* restrict flags */ 789 u_char vn_mode; /* packet mode & version */ 790 u_char cast_flags; /* flags MDF_?CAST */ 791 sockaddr_u rmtadr; /* address of remote host */ 792 }; 793 794 /* 795 * Values for cast_flags in mon_entry and struct peer. mon_entry uses 796 * only the first three, MDF_UCAST, MDF_MCAST, and MDF_BCAST. 797 */ 798 #define MDF_UCAST 0x01 /* unicast client */ 799 #define MDF_MCAST 0x02 /* multicast server */ 800 #define MDF_BCAST 0x04 /* broadcast server */ 801 #define MDF_POOL 0x08 /* pool client solicitor */ 802 #define MDF_ACAST 0x10 /* manycast client solicitor */ 803 #define MDF_BCLNT 0x20 /* eph. broadcast/multicast client */ 804 #define MDF_UCLNT 0x40 /* preemptible manycast or pool client */ 805 /* 806 * In the context of struct peer in ntpd, three of the cast_flags bits 807 * represent configured associations which never receive packets, and 808 * whose reach is always 0: MDF_BCAST, MDF_MCAST, and MDF_ACAST. The 809 * last can be argued as responses are received, but those responses do 810 * not affect the MDF_ACAST association's reach register, rather they 811 * (may) result in mobilizing ephemeral MDF_ACLNT associations. 812 */ 813 #define MDF_TXONLY_MASK (MDF_BCAST | MDF_MCAST | MDF_ACAST | MDF_POOL) 814 /* 815 * manycastclient-like solicitor association cast_flags bits 816 */ 817 #define MDF_SOLICIT_MASK (MDF_ACAST | MDF_POOL) 818 /* 819 * Values used with mon_enabled to indicate reason for enabling monitoring 820 */ 821 #define MON_OFF 0x00 /* no monitoring */ 822 #define MON_ON 0x01 /* monitoring explicitly enabled */ 823 #define MON_RES 0x02 /* implicit monitoring for RES_LIMITED */ 824 /* 825 * Structure used for restrictlist entries 826 */ 827 typedef struct res_addr4_tag { 828 u_int32 addr; /* IPv4 addr (host order) */ 829 u_int32 mask; /* IPv4 mask (host order) */ 830 } res_addr4; 831 832 typedef struct res_addr6_tag { 833 struct in6_addr addr; /* IPv6 addr (net order) */ 834 struct in6_addr mask; /* IPv6 mask (net order) */ 835 } res_addr6; 836 837 typedef struct restrict_u_tag restrict_u; 838 struct restrict_u_tag { 839 restrict_u * link; /* link to next entry */ 840 u_int32 count; /* number of packets matched */ 841 u_short rflags; /* restrict (accesslist) flags */ 842 u_short mflags; /* match flags */ 843 short ippeerlimit; /* IP peer limit */ 844 u_long expire; /* valid until time */ 845 union { /* variant starting here */ 846 res_addr4 v4; 847 res_addr6 v6; 848 } u; 849 }; 850 #define V4_SIZEOF_RESTRICT_U (offsetof(restrict_u, u) \ 851 + sizeof(res_addr4)) 852 #define V6_SIZEOF_RESTRICT_U (offsetof(restrict_u, u) \ 853 + sizeof(res_addr6)) 854 855 typedef struct r4addr_tag r4addr; 856 struct r4addr_tag { 857 u_short rflags; /* match flags */ 858 short ippeerlimit; /* IP peer limit */ 859 }; 860 861 char *build_iflags(u_int32 flags); 862 char *build_mflags(u_short mflags); 863 char *build_rflags(u_short rflags); 864 865 /* 866 * Restrict (Access) flags (rflags) 867 */ 868 #define RES_IGNORE 0x0001 /* ignore packet */ 869 #define RES_DONTSERVE 0x0002 /* access denied */ 870 #define RES_DONTTRUST 0x0004 /* authentication required */ 871 #define RES_VERSION 0x0008 /* version mismatch */ 872 #define RES_NOPEER 0x0010 /* new association denied */ 873 #define RES_NOEPEER 0x0020 /* new ephemeral association denied */ 874 #define RES_LIMITED 0x0040 /* packet rate exceeded */ 875 #define RES_FLAGS (RES_IGNORE | RES_DONTSERVE |\ 876 RES_DONTTRUST | RES_VERSION |\ 877 RES_NOPEER | RES_NOEPEER | RES_LIMITED) 878 879 #define RES_NOQUERY 0x0080 /* mode 6/7 packet denied */ 880 #define RES_NOMODIFY 0x0100 /* mode 6/7 modify denied */ 881 #define RES_NOTRAP 0x0200 /* mode 6/7 set trap denied */ 882 #define RES_LPTRAP 0x0400 /* mode 6/7 low priority trap */ 883 884 #define RES_KOD 0x0800 /* send kiss of death packet */ 885 #define RES_MSSNTP 0x1000 /* enable MS-SNTP authentication */ 886 #define RES_FLAKE 0x2000 /* flakeway - drop 10% */ 887 #define RES_NOMRULIST 0x4000 /* mode 6 mrulist denied */ 888 #define RES_UNUSED 0x8000 /* Unused flag bits */ 889 890 #define RES_ALLFLAGS (RES_FLAGS | RES_NOQUERY | \ 891 RES_NOMODIFY | RES_NOTRAP | \ 892 RES_LPTRAP | RES_KOD | \ 893 RES_MSSNTP | RES_FLAKE | \ 894 RES_NOMRULIST) 895 896 /* 897 * Match flags (mflags) 898 */ 899 #define RESM_INTERFACE 0x1000 /* this is an interface */ 900 #define RESM_NTPONLY 0x2000 /* match source port 123 */ 901 #define RESM_SOURCE 0x4000 /* from "restrict source" */ 902 903 /* 904 * Restriction configuration ops 905 */ 906 typedef enum 907 restrict_ops { 908 RESTRICT_FLAGS = 1, /* add rflags to restrict entry */ 909 RESTRICT_UNFLAG, /* remove rflags from restrict entry */ 910 RESTRICT_REMOVE, /* remove a restrict entry */ 911 RESTRICT_REMOVEIF, /* remove an interface restrict entry */ 912 } restrict_op; 913 914 /* 915 * Endpoint structure for the select algorithm 916 */ 917 struct endpoint { 918 double val; /* offset of endpoint */ 919 int type; /* interval entry/exit */ 920 }; 921 922 /* 923 * Association matching AM[] return codes 924 */ 925 #define AM_ERR -1 /* error */ 926 #define AM_NOMATCH 0 /* no match */ 927 #define AM_PROCPKT 1 /* server/symmetric packet */ 928 #define AM_BCST 2 /* broadcast packet */ 929 #define AM_FXMIT 3 /* client packet */ 930 #define AM_MANYCAST 4 /* manycast or pool */ 931 #define AM_NEWPASS 5 /* new passive */ 932 #define AM_NEWBCL 6 /* new broadcast */ 933 #define AM_POSSBCL 7 /* discard broadcast */ 934 935 /* NetInfo configuration locations */ 936 #ifdef HAVE_NETINFO 937 #define NETINFO_CONFIG_DIR "/config/ntp" 938 #endif 939 940 /* ntpq -c mrulist rows per request limit in ntpd */ 941 #define MRU_ROW_LIMIT 256 942 /* similar datagrams per response limit for ntpd */ 943 #define MRU_FRAGS_LIMIT 128 944 #endif /* NTP_H */ 945