contrib/ntp/ntpd/ntp_config.c

   1 /* ntp_config.c
   2  *
   3  * This file contains the ntpd configuration code.
   4  *
   5  * Written By:  Sachin Kamboj
   6  *              University of Delaware
   7  *              Newark, DE 19711
   8  * Some parts borrowed from the older ntp_config.c
   9  * Copyright (c) 2006
  10  */
  11
  12 #ifdef HAVE_CONFIG_H
  13 # include <config.h>
  14 #endif
  15
  16 #ifdef HAVE_NETINFO
  17 # include <netinfo/ni.h>
  18 #endif
  19
  20 #include <stdio.h>
  21 #include <ctype.h>
  22 #ifdef HAVE_SYS_PARAM_H
  23 # include <sys/param.h>
  24 #endif
  25 #include <signal.h>
  26 #ifndef SIGCHLD
  27 # define SIGCHLD SIGCLD
  28 #endif
  29 #ifdef HAVE_SYS_WAIT_H
  30 # include <sys/wait.h>
  31 #endif
  32
  33 #include <isc/net.h>
  34 #include <isc/result.h>
  35
  36 #include "ntp.h"
  37 #include "ntpd.h"
  38 #include "ntp_io.h"
  39 #include "ntp_unixtime.h"
  40 #include "ntp_refclock.h"
  41 #include "ntp_filegen.h"
  42 #include "ntp_stdlib.h"
  43 #include "lib_strbuf.h"
  44 #include "ntp_assert.h"
  45 #include "ntp_random.h"
  46 /*
  47  * [Bug 467]: Some linux headers collide with CONFIG_PHONE and CONFIG_KEYS
  48  * so #include these later.
  49  */
  50 #include "ntp_config.h"
  51 #include "ntp_cmdargs.h"
  52 #include "ntp_scanner.h"
  53 #include "ntp_parser.h"
  54 #include "ntpd-opts.h"
  55
  56 #ifndef IGNORE_DNS_ERRORS
  57 # define DNSFLAGS 0
  58 #else
  59 # define DNSFLAGS GAIR_F_IGNDNSERR
  60 #endif
  61
  62 extern int yyparse(void);
  63
  64 /* Bug 2817 */
  65 #if defined(HAVE_SYS_MMAN_H)
  66 # include <sys/mman.h>
  67 #endif
  68
  69 /* list of servers from command line for config_peers() */
  70 int     cmdline_server_count;
  71 char ** cmdline_servers;
  72
  73 /* Current state of memory locking:
  74  * -1: default
  75  *  0: memory locking disabled
  76  *  1: Memory locking enabled
  77  */
  78 int     cur_memlock = -1;
  79
  80 /*
  81  * "logconfig" building blocks
  82  */
  83 struct masks {
  84         const char * const      name;
  85         const u_int32           mask;
  86 };
  87
  88 static struct masks logcfg_class[] = {
  89         { "clock",      NLOG_OCLOCK },
  90         { "peer",       NLOG_OPEER },
  91         { "sync",       NLOG_OSYNC },
  92         { "sys",        NLOG_OSYS },
  93         { NULL,         0 }
  94 };
  95
  96 /* logcfg_noclass_items[] masks are complete and must not be shifted */
  97 static struct masks logcfg_noclass_items[] = {
  98         { "allall",             NLOG_SYSMASK | NLOG_PEERMASK | NLOG_CLOCKMASK | NLOG_SYNCMASK },
  99         { "allinfo",            NLOG_SYSINFO | NLOG_PEERINFO | NLOG_CLOCKINFO | NLOG_SYNCINFO },
 100         { "allevents",          NLOG_SYSEVENT | NLOG_PEEREVENT | NLOG_CLOCKEVENT | NLOG_SYNCEVENT },
 101         { "allstatus",          NLOG_SYSSTATUS | NLOG_PEERSTATUS | NLOG_CLOCKSTATUS | NLOG_SYNCSTATUS },
 102         { "allstatistics",      NLOG_SYSSTATIST | NLOG_PEERSTATIST | NLOG_CLOCKSTATIST | NLOG_SYNCSTATIST },
 103         /* the remainder are misspellings of clockall, peerall, sysall, and syncall. */
 104         { "allclock",           (NLOG_INFO | NLOG_STATIST | NLOG_EVENT | NLOG_STATUS) << NLOG_OCLOCK },
 105         { "allpeer",            (NLOG_INFO | NLOG_STATIST | NLOG_EVENT | NLOG_STATUS) << NLOG_OPEER },
 106         { "allsys",             (NLOG_INFO | NLOG_STATIST | NLOG_EVENT | NLOG_STATUS) << NLOG_OSYS },
 107         { "allsync",            (NLOG_INFO | NLOG_STATIST | NLOG_EVENT | NLOG_STATUS) << NLOG_OSYNC },
 108         { NULL,                 0 }
 109 };
 110
 111 /* logcfg_class_items[] masks are shiftable by NLOG_O* counts */
 112 static struct masks logcfg_class_items[] = {
 113         { "all",                NLOG_INFO | NLOG_EVENT | NLOG_STATUS | NLOG_STATIST },
 114         { "info",               NLOG_INFO },
 115         { "events",             NLOG_EVENT },
 116         { "status",             NLOG_STATUS },
 117         { "statistics",         NLOG_STATIST },
 118         { NULL,                 0 }
 119 };
 120
 121 typedef struct peer_resolved_ctx_tag {
 122         int             flags;
 123         int             host_mode;      /* T_* token identifier */
 124         u_short         family;
 125         keyid_t         keyid;
 126         u_char          hmode;          /* MODE_* */
 127         u_char          version;
 128         u_char          minpoll;
 129         u_char          maxpoll;
 130         u_int32         ttl;
 131         const char *    group;
 132 } peer_resolved_ctx;
 133
 134 /* Limits */
 135 #define MAXPHONE        10      /* maximum number of phone strings */
 136 #define MAXPPS          20      /* maximum length of PPS device string */
 137
 138 /*
 139  * Miscellaneous macros
 140  */
 141 #define ISEOL(c)        ((c) == '#' || (c) == '\n' || (c) == '\0')
 142 #define ISSPACE(c)      ((c) == ' ' || (c) == '\t')
 143
 144 #define _UC(str)        ((char *)(intptr_t)(str))
 145
 146 /*
 147  * Definitions of things either imported from or exported to outside
 148  */
 149 extern int yydebug;                     /* ntp_parser.c (.y) */
 150 config_tree cfgt;                       /* Parser output stored here */
 151 struct config_tree_tag *cfg_tree_history;       /* History of configs */
 152 char *  sys_phone[MAXPHONE] = {NULL};   /* ACTS phone numbers */
 153 char    default_keysdir[] = NTP_KEYSDIR;
 154 char *  keysdir = default_keysdir;      /* crypto keys directory */
 155 char *  saveconfigdir;
 156 #if defined(HAVE_SCHED_SETSCHEDULER)
 157 int     config_priority_override = 0;
 158 int     config_priority;
 159 #endif
 160
 161 const char *config_file;
 162 static char default_ntp_signd_socket[] =
 163 #ifdef NTP_SIGND_PATH
 164                                         NTP_SIGND_PATH;
 165 #else
 166                                         "";
 167 #endif
 168 char *ntp_signd_socket = default_ntp_signd_socket;
 169 #ifdef HAVE_NETINFO
 170 struct netinfo_config_state *config_netinfo = NULL;
 171 int check_netinfo = 1;
 172 #endif /* HAVE_NETINFO */
 173 #ifdef SYS_WINNT
 174 char *alt_config_file;
 175 LPTSTR temp;
 176 char config_file_storage[MAX_PATH];
 177 char alt_config_file_storage[MAX_PATH];
 178 #endif /* SYS_WINNT */
 179
 180 #ifdef HAVE_NETINFO
 181 /*
 182  * NetInfo configuration state
 183  */
 184 struct netinfo_config_state {
 185         void *domain;           /* domain with config */
 186         ni_id config_dir;       /* ID config dir      */
 187         int prop_index;         /* current property   */
 188         int val_index;          /* current value      */
 189         char **val_list;        /* value list         */
 190 };
 191 #endif
 192
 193 struct REMOTE_CONFIG_INFO remote_config;  /* Remote configuration buffer and
 194                                              pointer info */
 195 int old_config_style = 1;    /* A boolean flag, which when set,
 196                               * indicates that the old configuration
 197                               * format with a newline at the end of
 198                               * every command is being used
 199                               */
 200 int     cryptosw;               /* crypto command called */
 201
 202 extern char *stats_drift_file;  /* name of the driftfile */
 203
 204 #ifdef BC_LIST_FRAMEWORK_NOT_YET_USED
 205 /*
 206  * backwards compatibility flags
 207  */
 208 bc_entry bc_list[] = {
 209         { T_Bc_bugXXXX,         1       }       /* default enabled */
 210 };
 211
 212 /*
 213  * declare an int pointer for each flag for quick testing without
 214  * walking bc_list.  If the pointer is consumed by libntp rather
 215  * than ntpd, declare it in a libntp source file pointing to storage
 216  * initialized with the appropriate value for other libntp clients, and
 217  * redirect it to point into bc_list during ntpd startup.
 218  */
 219 int *p_bcXXXX_enabled = &bc_list[0].enabled;
 220 #endif
 221
 222 /* FUNCTION PROTOTYPES */
 223
 224 static void init_syntax_tree(config_tree *);
 225 static void apply_enable_disable(attr_val_fifo *q, int enable);
 226
 227 #ifdef FREE_CFG_T
 228 static void free_auth_node(config_tree *);
 229 static void free_all_config_trees(void);
 230
 231 static void free_config_access(config_tree *);
 232 static void free_config_auth(config_tree *);
 233 static void free_config_fudge(config_tree *);
 234 static void free_config_logconfig(config_tree *);
 235 static void free_config_monitor(config_tree *);
 236 static void free_config_nic_rules(config_tree *);
 237 static void free_config_other_modes(config_tree *);
 238 static void free_config_peers(config_tree *);
 239 static void free_config_phone(config_tree *);
 240 static void free_config_reset_counters(config_tree *);
 241 static void free_config_rlimit(config_tree *);
 242 static void free_config_setvar(config_tree *);
 243 static void free_config_system_opts(config_tree *);
 244 static void free_config_tinker(config_tree *);
 245 static void free_config_tos(config_tree *);
 246 static void free_config_trap(config_tree *);
 247 static void free_config_ttl(config_tree *);
 248 static void free_config_unpeers(config_tree *);
 249 static void free_config_vars(config_tree *);
 250
 251 #ifdef SIM
 252 static void free_config_sim(config_tree *);
 253 #endif
 254 static void destroy_address_fifo(address_fifo *);
 255 #define FREE_ADDRESS_FIFO(pf)                   \
 256         do {                                    \
 257                 destroy_address_fifo(pf);       \
 258                 (pf) = NULL;                    \
 259         } while (0)
 260        void free_all_config_trees(void);        /* atexit() */
 261 static void free_config_tree(config_tree *ptree);
 262 #endif  /* FREE_CFG_T */
 263
 264 static void destroy_restrict_node(restrict_node *my_node);
 265 static int is_sane_resolved_address(sockaddr_u *peeraddr, int hmode);
 266 static void save_and_apply_config_tree(int/*BOOL*/ from_file);
 267 static void destroy_int_fifo(int_fifo *);
 268 #define FREE_INT_FIFO(pf)                       \
 269         do {                                    \
 270                 destroy_int_fifo(pf);           \
 271                 (pf) = NULL;                    \
 272         } while (0)
 273 static void destroy_string_fifo(string_fifo *);
 274 #define FREE_STRING_FIFO(pf)                    \
 275         do {                                    \
 276                 destroy_string_fifo(pf);                \
 277                 (pf) = NULL;                    \
 278         } while (0)
 279 static void destroy_attr_val_fifo(attr_val_fifo *);
 280 #define FREE_ATTR_VAL_FIFO(pf)                  \
 281         do {                                    \
 282                 destroy_attr_val_fifo(pf);      \
 283                 (pf) = NULL;                    \
 284         } while (0)
 285 static void destroy_filegen_fifo(filegen_fifo *);
 286 #define FREE_FILEGEN_FIFO(pf)                   \
 287         do {                                    \
 288                 destroy_filegen_fifo(pf);       \
 289                 (pf) = NULL;                    \
 290         } while (0)
 291 static void destroy_restrict_fifo(restrict_fifo *);
 292 #define FREE_RESTRICT_FIFO(pf)                  \
 293         do {                                    \
 294                 destroy_restrict_fifo(pf);      \
 295                 (pf) = NULL;                    \
 296         } while (0)
 297 static void destroy_setvar_fifo(setvar_fifo *);
 298 #define FREE_SETVAR_FIFO(pf)                    \
 299         do {                                    \
 300                 destroy_setvar_fifo(pf);        \
 301                 (pf) = NULL;                    \
 302         } while (0)
 303 static void destroy_addr_opts_fifo(addr_opts_fifo *);
 304 #define FREE_ADDR_OPTS_FIFO(pf)                 \
 305         do {                                    \
 306                 destroy_addr_opts_fifo(pf);     \
 307                 (pf) = NULL;                    \
 308         } while (0)
 309
 310 static void config_logconfig(config_tree *);
 311 static void config_monitor(config_tree *);
 312 static void config_rlimit(config_tree *);
 313 static void config_system_opts(config_tree *);
 314 static void config_tinker(config_tree *);
 315 static int  config_tos_clock(config_tree *);
 316 static void config_tos(config_tree *);
 317 static void config_vars(config_tree *);
 318
 319 #ifdef SIM
 320 static sockaddr_u *get_next_address(address_node *addr);
 321 static void config_sim(config_tree *);
 322 static void config_ntpdsim(config_tree *);
 323 #else   /* !SIM follows */
 324 static void config_ntpd(config_tree *, int/*BOOL*/ input_from_file);
 325 static void config_other_modes(config_tree *);
 326 static void config_auth(config_tree *);
 327 static void config_access(config_tree *);
 328 static void config_mdnstries(config_tree *);
 329 static void config_phone(config_tree *);
 330 static void config_setvar(config_tree *);
 331 static void config_ttl(config_tree *);
 332 static void config_trap(config_tree *);
 333 static void config_fudge(config_tree *);
 334 static void config_peers(config_tree *);
 335 static void config_unpeers(config_tree *);
 336 static void config_nic_rules(config_tree *, int/*BOOL*/ input_from_file);
 337 static void config_reset_counters(config_tree *);
 338 static u_char get_correct_host_mode(int token);
 339 static int peerflag_bits(peer_node *);
 340 #endif  /* !SIM */
 341
 342 #ifdef WORKER
 343 static void peer_name_resolved(int, int, void *, const char *, const char *,
 344                         const struct addrinfo *,
 345                         const struct addrinfo *);
 346 static void unpeer_name_resolved(int, int, void *, const char *, const char *,
 347                           const struct addrinfo *,
 348                           const struct addrinfo *);
 349 static void trap_name_resolved(int, int, void *, const char *, const char *,
 350                         const struct addrinfo *,
 351                         const struct addrinfo *);
 352 #endif
 353
 354 enum gnn_type {
 355         t_UNK,          /* Unknown */
 356         t_REF,          /* Refclock */
 357         t_MSK           /* Network Mask */
 358 };
 359
 360 static void ntpd_set_tod_using(const char *);
 361 static char * normal_dtoa(double);
 362 static u_int32 get_pfxmatch(const char **, struct masks *);
 363 static u_int32 get_match(const char *, struct masks *);
 364 static u_int32 get_logmask(const char *);
 365 static int/*BOOL*/ is_refclk_addr(const address_node * addr);
 366
 367 static void     appendstr(char *, size_t, char *);
 368
 369
 370 #ifndef SIM
 371 static int getnetnum(const char *num, sockaddr_u *addr, int complain,
 372                      enum gnn_type a_type);
 373
 374 #endif
 375
 376 #if defined(__GNUC__) /* this covers CLANG, too */
 377 static void  __attribute__((noreturn,format(printf,1,2))) fatal_error(const char *fmt, ...)
 378 #elif defined(_MSC_VER)
 379 static void __declspec(noreturn) fatal_error(const char *fmt, ...)
 380 #else
 381 static void fatal_error(const char *fmt, ...)
 382 #endif
 383 {
 384         va_list va;
 385
 386         va_start(va, fmt);
 387         mvsyslog(LOG_EMERG, fmt, va);
 388         va_end(va);
 389         _exit(1);
 390 }
 391
 392
 393 /* FUNCTIONS FOR INITIALIZATION
 394  * ----------------------------
 395  */
 396
 397 #ifdef FREE_CFG_T
 398 static void
 399 free_auth_node(
 400         config_tree *ptree
 401         )
 402 {
 403         if (ptree->auth.keys) {
 404                 free(ptree->auth.keys);
 405                 ptree->auth.keys = NULL;
 406         }
 407
 408         if (ptree->auth.keysdir) {
 409                 free(ptree->auth.keysdir);
 410                 ptree->auth.keysdir = NULL;
 411         }
 412
 413         if (ptree->auth.ntp_signd_socket) {
 414                 free(ptree->auth.ntp_signd_socket);
 415                 ptree->auth.ntp_signd_socket = NULL;
 416         }
 417 }
 418 #endif /* DEBUG */
 419
 420
 421 static void
 422 init_syntax_tree(
 423         config_tree *ptree
 424         )
 425 {
 426         ZERO(*ptree);
 427         ptree->mdnstries = 5;
 428 }
 429
 430
 431 #ifdef FREE_CFG_T
 432 static void
 433 free_all_config_trees(void)
 434 {
 435         config_tree *ptree;
 436         config_tree *pnext;
 437
 438         ptree = cfg_tree_history;
 439
 440         while (ptree != NULL) {
 441                 pnext = ptree->link;
 442                 free_config_tree(ptree);
 443                 ptree = pnext;
 444         }
 445 }
 446
 447
 448 static void
 449 free_config_tree(
 450         config_tree *ptree
 451         )
 452 {
 453 #if defined(_MSC_VER) && defined (_DEBUG)
 454         _CrtCheckMemory();
 455 #endif
 456
 457         if (ptree->source.value.s != NULL)
 458                 free(ptree->source.value.s);
 459
 460         free_config_other_modes(ptree);
 461         free_config_auth(ptree);
 462         free_config_tos(ptree);
 463         free_config_monitor(ptree);
 464         free_config_access(ptree);
 465         free_config_tinker(ptree);
 466         free_config_rlimit(ptree);
 467         free_config_system_opts(ptree);
 468         free_config_logconfig(ptree);
 469         free_config_phone(ptree);
 470         free_config_setvar(ptree);
 471         free_config_ttl(ptree);
 472         free_config_trap(ptree);
 473         free_config_fudge(ptree);
 474         free_config_vars(ptree);
 475         free_config_peers(ptree);
 476         free_config_unpeers(ptree);
 477         free_config_nic_rules(ptree);
 478         free_config_reset_counters(ptree);
 479 #ifdef SIM
 480         free_config_sim(ptree);
 481 #endif
 482         free_auth_node(ptree);
 483
 484         free(ptree);
 485
 486 #if defined(_MSC_VER) && defined (_DEBUG)
 487         _CrtCheckMemory();
 488 #endif
 489 }
 490 #endif /* FREE_CFG_T */
 491
 492
 493 #ifdef SAVECONFIG
 494 /* Dump all trees */
 495 int
 496 dump_all_config_trees(
 497         FILE *df,
 498         int comment
 499         )
 500 {
 501         config_tree *   cfg_ptr;
 502         int             return_value;
 503
 504         return_value = 0;
 505         for (cfg_ptr = cfg_tree_history;
 506              cfg_ptr != NULL;
 507              cfg_ptr = cfg_ptr->link)
 508                 return_value |= dump_config_tree(cfg_ptr, df, comment);
 509
 510         return return_value;
 511 }
 512
 513
 514 /* The config dumper */
 515 int
 516 dump_config_tree(
 517         config_tree *ptree,
 518         FILE *df,
 519         int comment
 520         )
 521 {
 522         peer_node *peern;
 523         unpeer_node *unpeern;
 524         attr_val *atrv;
 525         address_node *addr;
 526         address_node *peer_addr;
 527         address_node *fudge_addr;
 528         filegen_node *fgen_node;
 529         restrict_node *rest_node;
 530         addr_opts_node *addr_opts;
 531         setvar_node *setv_node;
 532         nic_rule_node *rule_node;
 533         int_node *i_n;
 534         int_node *flag_tok_fifo;
 535         int_node *counter_set;
 536         string_node *str_node;
 537
 538         const char *s = NULL;
 539         char *s1;
 540         char *s2;
 541         char timestamp[80];
 542         int enable;
 543
 544         DPRINTF(1, ("dump_config_tree(%p)\n", ptree));
 545
 546         if (comment) {
 547                 if (!strftime(timestamp, sizeof(timestamp),
 548                               "%Y-%m-%d %H:%M:%S",
 549                               localtime(&ptree->timestamp)))
 550                         timestamp[0] = '\0';
 551
 552                 fprintf(df, "# %s %s %s\n",
 553                         timestamp,
 554                         (CONF_SOURCE_NTPQ == ptree->source.attr)
 555                             ? "ntpq remote config from"
 556                             : "startup configuration file",
 557                         ptree->source.value.s);
 558         }
 559
 560         /*
 561          * For options without documentation we just output the name
 562          * and its data value
 563          */
 564         atrv = HEAD_PFIFO(ptree->vars);
 565         for ( ; atrv != NULL; atrv = atrv->link) {
 566                 switch (atrv->type) {
 567 #ifdef DEBUG
 568                 default:
 569                         fprintf(df, "\n# dump error:\n"
 570                                 "# unknown vars type %d (%s) for %s\n",
 571                                 atrv->type, token_name(atrv->type),
 572                                 token_name(atrv->attr));
 573                         break;
 574 #endif
 575                 case T_Double:
 576                         fprintf(df, "%s %s\n", keyword(atrv->attr),
 577                                 normal_dtoa(atrv->value.d));
 578                         break;
 579
 580                 case T_Integer:
 581                         fprintf(df, "%s %d\n", keyword(atrv->attr),
 582                                 atrv->value.i);
 583                         break;
 584
 585                 case T_String:
 586                         fprintf(df, "%s \"%s\"", keyword(atrv->attr),
 587                                 atrv->value.s);
 588                         if (T_Driftfile == atrv->attr &&
 589                             atrv->link != NULL &&
 590                             T_WanderThreshold == atrv->link->attr) {
 591                                 atrv = atrv->link;
 592                                 fprintf(df, " %s\n",
 593                                         normal_dtoa(atrv->value.d));
 594                         } else {
 595                                 fprintf(df, "\n");
 596                         }
 597                         break;
 598                 }
 599         }
 600
 601         atrv = HEAD_PFIFO(ptree->logconfig);
 602         if (atrv != NULL) {
 603                 fprintf(df, "logconfig");
 604                 for ( ; atrv != NULL; atrv = atrv->link)
 605                         fprintf(df, " %c%s", atrv->attr, atrv->value.s);
 606                 fprintf(df, "\n");
 607         }
 608
 609         if (ptree->stats_dir)
 610                 fprintf(df, "statsdir \"%s\"\n", ptree->stats_dir);
 611
 612         i_n = HEAD_PFIFO(ptree->stats_list);
 613         if (i_n != NULL) {
 614                 fprintf(df, "statistics");
 615                 for ( ; i_n != NULL; i_n = i_n->link)
 616                         fprintf(df, " %s", keyword(i_n->i));
 617                 fprintf(df, "\n");
 618         }
 619
 620         fgen_node = HEAD_PFIFO(ptree->filegen_opts);
 621         for ( ; fgen_node != NULL; fgen_node = fgen_node->link) {
 622                 atrv = HEAD_PFIFO(fgen_node->options);
 623                 if (atrv != NULL) {
 624                         fprintf(df, "filegen %s",
 625                                 keyword(fgen_node->filegen_token));
 626                         for ( ; atrv != NULL; atrv = atrv->link) {
 627                                 switch (atrv->attr) {
 628 #ifdef DEBUG
 629                                 default:
 630                                         fprintf(df, "\n# dump error:\n"
 631                                                 "# unknown filegen option token %s\n"
 632                                                 "filegen %s",
 633                                                 token_name(atrv->attr),
 634                                                 keyword(fgen_node->filegen_token));
 635                                         break;
 636 #endif
 637                                 case T_File:
 638                                         fprintf(df, " file %s",
 639                                                 atrv->value.s);
 640                                         break;
 641
 642                                 case T_Type:
 643                                         fprintf(df, " type %s",
 644                                                 keyword(atrv->value.i));
 645                                         break;
 646
 647                                 case T_Flag:
 648                                         fprintf(df, " %s",
 649                                                 keyword(atrv->value.i));
 650                                         break;
 651                                 }
 652                         }
 653                         fprintf(df, "\n");
 654                 }
 655         }
 656
 657         atrv = HEAD_PFIFO(ptree->auth.crypto_cmd_list);
 658         if (atrv != NULL) {
 659                 fprintf(df, "crypto");
 660                 for ( ; atrv != NULL; atrv = atrv->link) {
 661                         fprintf(df, " %s %s", keyword(atrv->attr),
 662                                 atrv->value.s);
 663                 }
 664                 fprintf(df, "\n");
 665         }
 666
 667         if (ptree->auth.revoke != 0)
 668                 fprintf(df, "revoke %d\n", ptree->auth.revoke);
 669
 670         if (ptree->auth.keysdir != NULL)
 671                 fprintf(df, "keysdir \"%s\"\n", ptree->auth.keysdir);
 672
 673         if (ptree->auth.keys != NULL)
 674                 fprintf(df, "keys \"%s\"\n", ptree->auth.keys);
 675
 676         atrv = HEAD_PFIFO(ptree->auth.trusted_key_list);
 677         if (atrv != NULL) {
 678                 fprintf(df, "trustedkey");
 679                 for ( ; atrv != NULL; atrv = atrv->link) {
 680                         if (T_Integer == atrv->type)
 681                                 fprintf(df, " %d", atrv->value.i);
 682                         else if (T_Intrange == atrv->type)
 683                                 fprintf(df, " (%d ... %d)",
 684                                         atrv->value.r.first,
 685                                         atrv->value.r.last);
 686 #ifdef DEBUG
 687                         else
 688                                 fprintf(df, "\n# dump error:\n"
 689                                         "# unknown trustedkey attr type %d\n"
 690                                         "trustedkey", atrv->type);
 691 #endif
 692                 }
 693                 fprintf(df, "\n");
 694         }
 695
 696         if (ptree->auth.control_key)
 697                 fprintf(df, "controlkey %d\n", ptree->auth.control_key);
 698
 699         if (ptree->auth.request_key)
 700                 fprintf(df, "requestkey %d\n", ptree->auth.request_key);
 701
 702         /* dump enable list, then disable list */
 703         for (enable = 1; enable >= 0; enable--) {
 704                 atrv = (enable)
 705                            ? HEAD_PFIFO(ptree->enable_opts)
 706                            : HEAD_PFIFO(ptree->disable_opts);
 707                 if (atrv != NULL) {
 708                         fprintf(df, "%s", (enable)
 709                                         ? "enable"
 710                                         : "disable");
 711                         for ( ; atrv != NULL; atrv = atrv->link)
 712                                 fprintf(df, " %s",
 713                                         keyword(atrv->value.i));
 714                         fprintf(df, "\n");
 715                 }
 716         }
 717
 718         atrv = HEAD_PFIFO(ptree->orphan_cmds);
 719         if (atrv != NULL) {
 720                 fprintf(df, "tos");
 721                 for ( ; atrv != NULL; atrv = atrv->link) {
 722                         switch (atrv->type) {
 723 #ifdef DEBUG
 724                         default:
 725                                 fprintf(df, "\n# dump error:\n"
 726                                         "# unknown tos attr type %d %s\n"
 727                                         "tos", atrv->type,
 728                                         token_name(atrv->type));
 729                                 break;
 730 #endif
 731                         case T_Integer:
 732                                 if (atrv->attr == T_Basedate) {
 733                                         struct calendar jd;
 734                                         ntpcal_rd_to_date(&jd, atrv->value.i + DAY_NTP_STARTS);
 735                                         fprintf(df, " %s \"%04hu-%02hu-%02hu\"",
 736                                                 keyword(atrv->attr), jd.year,
 737                                                 (u_short)jd.month,
 738                                                 (u_short)jd.monthday);
 739                                 } else {
 740                                         fprintf(df, " %s %d",
 741                                         keyword(atrv->attr),
 742                                         atrv->value.i);
 743                                 }
 744                                 break;
 745
 746                         case T_Double:
 747                                 fprintf(df, " %s %s",
 748                                         keyword(atrv->attr),
 749                                         normal_dtoa(atrv->value.d));
 750                                 break;
 751                         }
 752                 }
 753                 fprintf(df, "\n");
 754         }
 755
 756         atrv = HEAD_PFIFO(ptree->rlimit);
 757         if (atrv != NULL) {
 758                 fprintf(df, "rlimit");
 759                 for ( ; atrv != NULL; atrv = atrv->link) {
 760                         INSIST(T_Integer == atrv->type);
 761                         fprintf(df, " %s %d", keyword(atrv->attr),
 762                                 atrv->value.i);
 763                 }
 764                 fprintf(df, "\n");
 765         }
 766
 767         atrv = HEAD_PFIFO(ptree->tinker);
 768         if (atrv != NULL) {
 769                 fprintf(df, "tinker");
 770                 for ( ; atrv != NULL; atrv = atrv->link) {
 771                         INSIST(T_Double == atrv->type);
 772                         fprintf(df, " %s %s", keyword(atrv->attr),
 773                                 normal_dtoa(atrv->value.d));
 774                 }
 775                 fprintf(df, "\n");
 776         }
 777
 778         if (ptree->broadcastclient)
 779                 fprintf(df, "broadcastclient\n");
 780
 781         peern = HEAD_PFIFO(ptree->peers);
 782         for ( ; peern != NULL; peern = peern->link) {
 783                 addr = peern->addr;
 784                 fprintf(df, "%s", keyword(peern->host_mode));
 785                 switch (addr->type) {
 786 #ifdef DEBUG
 787                 default:
 788                         fprintf(df, "# dump error:\n"
 789                                 "# unknown peer family %d for:\n"
 790                                 "%s", addr->type,
 791                                 keyword(peern->host_mode));
 792                         break;
 793 #endif
 794                 case AF_UNSPEC:
 795                         break;
 796
 797                 case AF_INET:
 798                         fprintf(df, " -4");
 799                         break;
 800
 801                 case AF_INET6:
 802                         fprintf(df, " -6");
 803                         break;
 804                 }
 805                 fprintf(df, " %s", addr->address);
 806
 807                 if (peern->minpoll != 0)
 808                         fprintf(df, " minpoll %u", peern->minpoll);
 809
 810                 if (peern->maxpoll != 0)
 811                         fprintf(df, " maxpoll %u", peern->maxpoll);
 812
 813                 if (peern->ttl != 0) {
 814                         if (strlen(addr->address) > 8
 815                             && !memcmp(addr->address, "127.127.", 8))
 816                                 fprintf(df, " mode %u", peern->ttl);
 817                         else
 818                                 fprintf(df, " ttl %u", peern->ttl);
 819                 }
 820
 821                 if (peern->peerversion != NTP_VERSION)
 822                         fprintf(df, " version %u", peern->peerversion);
 823
 824                 if (peern->peerkey != 0)
 825                         fprintf(df, " key %u", peern->peerkey);
 826
 827                 if (peern->group != NULL)
 828                         fprintf(df, " ident \"%s\"", peern->group);
 829
 830                 atrv = HEAD_PFIFO(peern->peerflags);
 831                 for ( ; atrv != NULL; atrv = atrv->link) {
 832                         INSIST(T_Flag == atrv->attr);
 833                         INSIST(T_Integer == atrv->type);
 834                         fprintf(df, " %s", keyword(atrv->value.i));
 835                 }
 836
 837                 fprintf(df, "\n");
 838
 839                 addr_opts = HEAD_PFIFO(ptree->fudge);
 840                 for ( ; addr_opts != NULL; addr_opts = addr_opts->link) {
 841                         peer_addr = peern->addr;
 842                         fudge_addr = addr_opts->addr;
 843
 844                         s1 = peer_addr->address;
 845                         s2 = fudge_addr->address;
 846
 847                         if (strcmp(s1, s2))
 848                                 continue;
 849
 850                         fprintf(df, "fudge %s", s1);
 851
 852                         for (atrv = HEAD_PFIFO(addr_opts->options);
 853                              atrv != NULL;
 854                              atrv = atrv->link) {
 855
 856                                 switch (atrv->type) {
 857 #ifdef DEBUG
 858                                 default:
 859                                         fprintf(df, "\n# dump error:\n"
 860                                                 "# unknown fudge atrv->type %d\n"
 861                                                 "fudge %s", atrv->type,
 862                                                 s1);
 863                                         break;
 864 #endif
 865                                 case T_Double:
 866                                         fprintf(df, " %s %s",
 867                                                 keyword(atrv->attr),
 868                                                 normal_dtoa(atrv->value.d));
 869                                         break;
 870
 871                                 case T_Integer:
 872                                         fprintf(df, " %s %d",
 873                                                 keyword(atrv->attr),
 874                                                 atrv->value.i);
 875                                         break;
 876
 877                                 case T_String:
 878                                         fprintf(df, " %s %s",
 879                                                 keyword(atrv->attr),
 880                                                 atrv->value.s);
 881                                         break;
 882                                 }
 883                         }
 884                         fprintf(df, "\n");
 885                 }
 886         }
 887
 888         addr = HEAD_PFIFO(ptree->manycastserver);
 889         if (addr != NULL) {
 890                 fprintf(df, "manycastserver");
 891                 for ( ; addr != NULL; addr = addr->link)
 892                         fprintf(df, " %s", addr->address);
 893                 fprintf(df, "\n");
 894         }
 895
 896         addr = HEAD_PFIFO(ptree->multicastclient);
 897         if (addr != NULL) {
 898                 fprintf(df, "multicastclient");
 899                 for ( ; addr != NULL; addr = addr->link)
 900                         fprintf(df, " %s", addr->address);
 901                 fprintf(df, "\n");
 902         }
 903
 904
 905         for (unpeern = HEAD_PFIFO(ptree->unpeers);
 906              unpeern != NULL;
 907              unpeern = unpeern->link)
 908                 fprintf(df, "unpeer %s\n", unpeern->addr->address);
 909
 910         atrv = HEAD_PFIFO(ptree->mru_opts);
 911         if (atrv != NULL) {
 912                 fprintf(df, "mru");
 913                 for ( ; atrv != NULL; atrv = atrv->link)
 914                         fprintf(df, " %s %d", keyword(atrv->attr),
 915                                 atrv->value.i);
 916                 fprintf(df, "\n");
 917         }
 918
 919         atrv = HEAD_PFIFO(ptree->discard_opts);
 920         if (atrv != NULL) {
 921                 fprintf(df, "discard");
 922                 for ( ; atrv != NULL; atrv = atrv->link)
 923                         fprintf(df, " %s %d", keyword(atrv->attr),
 924                                 atrv->value.i);
 925                 fprintf(df, "\n");
 926         }
 927
 928         for (rest_node = HEAD_PFIFO(ptree->restrict_opts);
 929              rest_node != NULL;
 930              rest_node = rest_node->link) {
 931                 int is_default = 0;
 932
 933                 if (NULL == rest_node->addr) {
 934                         s = "default";
 935                         /* Don't need to set is_default=1 here */
 936                         flag_tok_fifo = HEAD_PFIFO(rest_node->flag_tok_fifo);
 937                         for ( ; flag_tok_fifo != NULL; flag_tok_fifo = flag_tok_fifo->link) {
 938                                 if (T_Source == flag_tok_fifo->i) {
 939                                         s = "source";
 940                                         break;
 941                                 }
 942                         }
 943                 } else {
 944                         const char *ap = rest_node->addr->address;
 945                         const char *mp = "";
 946
 947                         if (rest_node->mask)
 948                                 mp = rest_node->mask->address;
 949
 950                         if (   rest_node->addr->type == AF_INET
 951                             && !strcmp(ap, "0.0.0.0")
 952                             && !strcmp(mp, "0.0.0.0")) {
 953                                 is_default = 1;
 954                                 s = "-4 default";
 955                         } else if (   rest_node->mask
 956                                    && rest_node->mask->type == AF_INET6
 957                                    && !strcmp(ap, "::")
 958                                    && !strcmp(mp, "::")) {
 959                                 is_default = 1;
 960                                 s = "-6 default";
 961                         } else {
 962                                 s = ap;
 963                         }
 964                 }
 965                 fprintf(df, "restrict %s", s);
 966                 if (rest_node->mask != NULL && !is_default)
 967                         fprintf(df, " mask %s",
 968                                 rest_node->mask->address);
 969                 fprintf(df, " ippeerlimit %d", rest_node->ippeerlimit);
 970                 flag_tok_fifo = HEAD_PFIFO(rest_node->flag_tok_fifo);
 971                 for ( ; flag_tok_fifo != NULL; flag_tok_fifo = flag_tok_fifo->link)
 972                         if (T_Source != flag_tok_fifo->i)
 973                                 fprintf(df, " %s", keyword(flag_tok_fifo->i));
 974                 fprintf(df, "\n");
 975         }
 976
 977         rule_node = HEAD_PFIFO(ptree->nic_rules);
 978         for ( ; rule_node != NULL; rule_node = rule_node->link) {
 979                 fprintf(df, "interface %s %s\n",
 980                         keyword(rule_node->action),
 981                         (rule_node->match_class)
 982                             ? keyword(rule_node->match_class)
 983                             : rule_node->if_name);
 984         }
 985
 986         str_node = HEAD_PFIFO(ptree->phone);
 987         if (str_node != NULL) {
 988                 fprintf(df, "phone");
 989                 for ( ; str_node != NULL; str_node = str_node->link)
 990                         fprintf(df, " \"%s\"", str_node->s);
 991                 fprintf(df, "\n");
 992         }
 993
 994         setv_node = HEAD_PFIFO(ptree->setvar);
 995         for ( ; setv_node != NULL; setv_node = setv_node->link) {
 996                 s1 = quote_if_needed(setv_node->var);
 997                 s2 = quote_if_needed(setv_node->val);
 998                 fprintf(df, "setvar %s = %s", s1, s2);
 999                 free(s1);
1000                 free(s2);
1001                 if (setv_node->isdefault)
1002                         fprintf(df, " default");
1003                 fprintf(df, "\n");
1004         }
1005
1006         i_n = HEAD_PFIFO(ptree->ttl);
1007         if (i_n != NULL) {
1008                 fprintf(df, "ttl");
1009                 for( ; i_n != NULL; i_n = i_n->link)
1010                         fprintf(df, " %d", i_n->i);
1011                 fprintf(df, "\n");
1012         }
1013
1014         addr_opts = HEAD_PFIFO(ptree->trap);
1015         for ( ; addr_opts != NULL; addr_opts = addr_opts->link) {
1016                 addr = addr_opts->addr;
1017                 fprintf(df, "trap %s", addr->address);
1018                 atrv = HEAD_PFIFO(addr_opts->options);
1019                 for ( ; atrv != NULL; atrv = atrv->link) {
1020                         switch (atrv->attr) {
1021 #ifdef DEBUG
1022                         default:
1023                                 fprintf(df, "\n# dump error:\n"
1024                                         "# unknown trap token %d\n"
1025                                         "trap %s", atrv->attr,
1026                                         addr->address);
1027                                 break;
1028 #endif
1029                         case T_Port:
1030                                 fprintf(df, " port %d", atrv->value.i);
1031                                 break;
1032
1033                         case T_Interface:
1034                                 fprintf(df, " interface %s",
1035                                         atrv->value.s);
1036                                 break;
1037                         }
1038                 }
1039                 fprintf(df, "\n");
1040         }
1041
1042         counter_set = HEAD_PFIFO(ptree->reset_counters);
1043         if (counter_set != NULL) {
1044                 fprintf(df, "reset");
1045                 for ( ; counter_set != NULL;
1046                      counter_set = counter_set->link)
1047                         fprintf(df, " %s", keyword(counter_set->i));
1048                 fprintf(df, "\n");
1049         }
1050
1051         return 0;
1052 }
1053 #endif  /* SAVECONFIG */
1054
1055
1056
1057 /* generic fifo routines for structs linked by 1st member */
1058 void *
1059 append_gen_fifo(
1060         void *fifo,
1061         void *entry
1062         )
1063 {
1064         gen_fifo *pf;
1065         gen_node *pe;
1066
1067         pf = fifo;
1068         pe = entry;
1069         if (NULL == pf)
1070                 pf = emalloc_zero(sizeof(*pf));
1071         else
1072                 CHECK_FIFO_CONSISTENCY(*pf);
1073         if (pe != NULL)
1074                 LINK_FIFO(*pf, pe, link);
1075         CHECK_FIFO_CONSISTENCY(*pf);
1076
1077         return pf;
1078 }
1079
1080
1081 void *
1082 concat_gen_fifos(
1083         void *first,
1084         void *second
1085         )
1086 {
1087         gen_fifo *pf1;
1088         gen_fifo *pf2;
1089
1090         pf1 = first;
1091         pf2 = second;
1092         if (NULL == pf1)
1093                 return pf2;
1094         if (NULL == pf2)
1095                 return pf1;
1096
1097         CONCAT_FIFO(*pf1, *pf2, link);
1098         free(pf2);
1099
1100         return pf1;
1101 }
1102
1103 void*
1104 destroy_gen_fifo(
1105         void        *fifo,
1106         fifo_deleter func
1107         )
1108 {
1109         any_node *      np  = NULL;
1110         any_node_fifo * pf1 = fifo;
1111
1112         if (pf1 != NULL) {
1113                 if (!func)
1114                         func = free;
1115                 for (;;) {
1116                         UNLINK_FIFO(np, *pf1, link);
1117                         if (np == NULL)
1118                                 break;
1119                         (*func)(np);
1120                 }
1121                 free(pf1);
1122         }
1123         return NULL;
1124 }
1125
1126 /* FUNCTIONS FOR CREATING NODES ON THE SYNTAX TREE
1127  * -----------------------------------------------
1128  */
1129
1130 void
1131 destroy_attr_val(
1132         attr_val *      av
1133         )
1134 {
1135         if (av) {
1136                 if (T_String == av->type)
1137                         free(av->value.s);
1138                 free(av);
1139         }
1140 }
1141
1142 attr_val *
1143 create_attr_dval(
1144         int attr,
1145         double value
1146         )
1147 {
1148         attr_val *my_val;
1149
1150         my_val = emalloc_zero(sizeof(*my_val));
1151         my_val->attr = attr;
1152         my_val->value.d = value;
1153         my_val->type = T_Double;
1154
1155         return my_val;
1156 }
1157
1158
1159 attr_val *
1160 create_attr_ival(
1161         int attr,
1162         int value
1163         )
1164 {
1165         attr_val *my_val;
1166
1167         my_val = emalloc_zero(sizeof(*my_val));
1168         my_val->attr = attr;
1169         my_val->value.i = value;
1170         my_val->type = T_Integer;
1171
1172         return my_val;
1173 }
1174
1175
1176 attr_val *
1177 create_attr_uval(
1178         int     attr,
1179         u_int   value
1180         )
1181 {
1182         attr_val *my_val;
1183
1184         my_val = emalloc_zero(sizeof(*my_val));
1185         my_val->attr = attr;
1186         my_val->value.u = value;
1187         my_val->type = T_U_int;
1188
1189         return my_val;
1190 }
1191
1192
1193 attr_val *
1194 create_attr_rangeval(
1195         int     attr,
1196         int     first,
1197         int     last
1198         )
1199 {
1200         attr_val *my_val;
1201
1202         my_val = emalloc_zero(sizeof(*my_val));
1203         my_val->attr = attr;
1204         my_val->value.r.first = first;
1205         my_val->value.r.last = last;
1206         my_val->type = T_Intrange;
1207
1208         return my_val;
1209 }
1210
1211
1212 attr_val *
1213 create_attr_sval(
1214         int attr,
1215         const char *s
1216         )
1217 {
1218         attr_val *my_val;
1219
1220         my_val = emalloc_zero(sizeof(*my_val));
1221         my_val->attr = attr;
1222         if (NULL == s)                  /* free() hates NULL */
1223                 s = estrdup("");
1224         my_val->value.s = _UC(s);
1225         my_val->type = T_String;
1226
1227         return my_val;
1228 }
1229
1230
1231 int_node *
1232 create_int_node(
1233         int val
1234         )
1235 {
1236         int_node *i_n;
1237
1238         i_n = emalloc_zero(sizeof(*i_n));
1239         i_n->i = val;
1240
1241         return i_n;
1242 }
1243
1244
1245 string_node *
1246 create_string_node(
1247         char *str
1248         )
1249 {
1250         string_node *sn;
1251
1252         sn = emalloc_zero(sizeof(*sn));
1253         sn->s = str;
1254
1255         return sn;
1256 }
1257
1258
1259 address_node *
1260 create_address_node(
1261         char *  addr,
1262         int     type
1263         )
1264 {
1265         address_node *my_node;
1266
1267         REQUIRE(NULL != addr);
1268         REQUIRE(AF_INET == type || AF_INET6 == type || AF_UNSPEC == type);
1269         my_node = emalloc_zero(sizeof(*my_node));
1270         my_node->address = addr;
1271         my_node->type = (u_short)type;
1272
1273         return my_node;
1274 }
1275
1276
1277 void
1278 destroy_address_node(
1279         address_node *my_node
1280         )
1281 {
1282         if (NULL == my_node)
1283                 return;
1284         REQUIRE(NULL != my_node->address);
1285
1286         free(my_node->address);
1287         free(my_node);
1288 }
1289
1290
1291 peer_node *
1292 create_peer_node(
1293         int             hmode,
1294         address_node *  addr,
1295         attr_val_fifo * options
1296         )
1297 {
1298         peer_node *my_node;
1299         attr_val *option;
1300         int freenode;
1301         int errflag = 0;
1302
1303         my_node = emalloc_zero(sizeof(*my_node));
1304
1305         /* Initialize node values to default */
1306         my_node->peerversion = NTP_VERSION;
1307
1308         /* Now set the node to the read values */
1309         my_node->host_mode = hmode;
1310         my_node->addr = addr;
1311
1312         /*
1313          * the options FIFO mixes items that will be saved in the
1314          * peer_node as explicit members, such as minpoll, and
1315          * those that are moved intact to the peer_node's peerflags
1316          * FIFO.  The options FIFO is consumed and reclaimed here.
1317          */
1318
1319         if (options != NULL)
1320                 CHECK_FIFO_CONSISTENCY(*options);
1321         while (options != NULL) {
1322                 UNLINK_FIFO(option, *options, link);
1323                 if (NULL == option) {
1324                         free(options);
1325                         break;
1326                 }
1327
1328                 freenode = 1;
1329                 /* Check the kind of option being set */
1330                 switch (option->attr) {
1331
1332                 case T_Flag:
1333                         APPEND_G_FIFO(my_node->peerflags, option);
1334                         freenode = 0;
1335                         break;
1336
1337                 case T_Minpoll:
1338                         if (option->value.i < NTP_MINPOLL ||
1339                             option->value.i > UCHAR_MAX) {
1340                                 msyslog(LOG_INFO,
1341                                         "minpoll: provided value (%d) is out of range [%d-%d])",
1342                                         option->value.i, NTP_MINPOLL,
1343                                         UCHAR_MAX);
1344                                 my_node->minpoll = NTP_MINPOLL;
1345                         } else {
1346                                 my_node->minpoll =
1347                                         (u_char)option->value.u;
1348                         }
1349                         break;
1350
1351                 case T_Maxpoll:
1352                         if (option->value.i < 0 ||
1353                             option->value.i > NTP_MAXPOLL) {
1354                                 msyslog(LOG_INFO,
1355                                         "maxpoll: provided value (%d) is out of range [0-%d])",
1356                                         option->value.i, NTP_MAXPOLL);
1357                                 my_node->maxpoll = NTP_MAXPOLL;
1358                         } else {
1359                                 my_node->maxpoll =
1360                                         (u_char)option->value.u;
1361                         }
1362                         break;
1363
1364                 case T_Ttl:
1365                         if (is_refclk_addr(addr)) {
1366                                 msyslog(LOG_ERR, "'ttl' does not apply for refclocks");
1367                                 errflag = 1;
1368                         } else if (option->value.u >= MAX_TTL) {
1369                                 msyslog(LOG_ERR, "ttl: invalid argument");
1370                                 errflag = 1;
1371                         } else {
1372                                 my_node->ttl = (u_char)option->value.u;
1373                         }
1374                         break;
1375
1376                 case T_Mode:
1377                         if (is_refclk_addr(addr)) {
1378                                 my_node->ttl = option->value.u;
1379                         } else {
1380                                 msyslog(LOG_ERR, "'mode' does not apply for network peers");
1381                                 errflag = 1;
1382                         }
1383                         break;
1384
1385                 case T_Key:
1386                         if (option->value.u >= KEYID_T_MAX) {
1387                                 msyslog(LOG_ERR, "key: invalid argument");
1388                                 errflag = 1;
1389                         } else {
1390                                 my_node->peerkey =
1391                                         (keyid_t)option->value.u;
1392                         }
1393                         break;
1394
1395                 case T_Version:
1396                         if (option->value.u >= UCHAR_MAX) {
1397                                 msyslog(LOG_ERR, "version: invalid argument");
1398                                 errflag = 1;
1399                         } else {
1400                                 my_node->peerversion =
1401                                         (u_char)option->value.u;
1402                         }
1403                         break;
1404
1405                 case T_Ident:
1406                         my_node->group = option->value.s;
1407                         break;
1408
1409                 default:
1410                         msyslog(LOG_ERR,
1411                                 "Unknown peer/server option token %s",
1412                                 token_name(option->attr));
1413                         errflag = 1;
1414                 }
1415                 if (freenode)
1416                         free(option);
1417         }
1418
1419         /* Check if errors were reported. If yes, ignore the node */
1420         if (errflag) {
1421                 free(my_node);
1422                 my_node = NULL;
1423         }
1424
1425         return my_node;
1426 }
1427
1428
1429 unpeer_node *
1430 create_unpeer_node(
1431         address_node *addr
1432         )
1433 {
1434         unpeer_node *   my_node;
1435         u_long          u;
1436         const u_char *  pch;
1437
1438         my_node = emalloc_zero(sizeof(*my_node));
1439
1440         /*
1441          * From the parser's perspective an association ID fits into
1442          * its generic T_String definition of a name/address "address".
1443          * We treat all valid 16-bit numbers as association IDs.
1444          */
1445         for (u = 0, pch = (u_char*)addr->address; isdigit(*pch); ++pch) {
1446                 /* accumulate with overflow retention */
1447                 u = (10 * u + *pch - '0') | (u & 0xFF000000u);
1448         }
1449
1450         if (!*pch && u <= ASSOCID_MAX) {
1451                 my_node->assocID = (associd_t)u;
1452                 my_node->addr = NULL;
1453                 destroy_address_node(addr);
1454         } else {
1455                 my_node->assocID = 0;
1456                 my_node->addr = addr;
1457         }
1458
1459         return my_node;
1460 }
1461
1462 filegen_node *
1463 create_filegen_node(
1464         int             filegen_token,
1465         attr_val_fifo * options
1466         )
1467 {
1468         filegen_node *my_node;
1469
1470         my_node = emalloc_zero(sizeof(*my_node));
1471         my_node->filegen_token = filegen_token;
1472         my_node->options = options;
1473
1474         return my_node;
1475 }
1476
1477
1478 restrict_node *
1479 create_restrict_node(
1480         address_node *  addr,
1481         address_node *  mask,
1482         short           ippeerlimit,
1483         int_fifo *      flag_tok_fifo,
1484         int             line_no
1485         )
1486 {
1487         restrict_node *my_node;
1488
1489         my_node = emalloc_zero(sizeof(*my_node));
1490         my_node->addr = addr;
1491         my_node->mask = mask;
1492         my_node->ippeerlimit = ippeerlimit;
1493         my_node->flag_tok_fifo = flag_tok_fifo;
1494         my_node->line_no = line_no;
1495
1496         return my_node;
1497 }
1498
1499
1500 static void
1501 destroy_restrict_node(
1502         restrict_node *my_node
1503         )
1504 {
1505         /* With great care, free all the memory occupied by
1506          * the restrict node
1507          */
1508         destroy_address_node(my_node->addr);
1509         destroy_address_node(my_node->mask);
1510         destroy_int_fifo(my_node->flag_tok_fifo);
1511         free(my_node);
1512 }
1513
1514
1515 static void
1516 destroy_int_fifo(
1517         int_fifo *      fifo
1518         )
1519 {
1520         int_node *      i_n;
1521
1522         if (fifo != NULL) {
1523                 for (;;) {
1524                         UNLINK_FIFO(i_n, *fifo, link);
1525                         if (i_n == NULL)
1526                                 break;
1527                         free(i_n);
1528                 }
1529                 free(fifo);
1530         }
1531 }
1532
1533
1534 static void
1535 destroy_string_fifo(
1536         string_fifo *   fifo
1537         )
1538 {
1539         string_node *   sn;
1540
1541         if (fifo != NULL) {
1542                 for (;;) {
1543                         UNLINK_FIFO(sn, *fifo, link);
1544                         if (sn == NULL)
1545                                 break;
1546                         free(sn->s);
1547                         free(sn);
1548                 }
1549                 free(fifo);
1550         }
1551 }
1552
1553
1554 static void
1555 destroy_attr_val_fifo(
1556         attr_val_fifo * av_fifo
1557         )
1558 {
1559         attr_val *      av;
1560
1561         if (av_fifo != NULL) {
1562                 for (;;) {
1563                         UNLINK_FIFO(av, *av_fifo, link);
1564                         if (av == NULL)
1565                                 break;
1566                         destroy_attr_val(av);
1567                 }
1568                 free(av_fifo);
1569         }
1570 }
1571
1572
1573 static void
1574 destroy_filegen_fifo(
1575         filegen_fifo *  fifo
1576         )
1577 {
1578         filegen_node *  fg;
1579
1580         if (fifo != NULL) {
1581                 for (;;) {
1582                         UNLINK_FIFO(fg, *fifo, link);
1583                         if (fg == NULL)
1584                                 break;
1585                         destroy_attr_val_fifo(fg->options);
1586                         free(fg);
1587                 }
1588                 free(fifo);
1589         }
1590 }
1591
1592
1593 static void
1594 destroy_restrict_fifo(
1595         restrict_fifo * fifo
1596         )
1597 {
1598         restrict_node * rn;
1599
1600         if (fifo != NULL) {
1601                 for (;;) {
1602                         UNLINK_FIFO(rn, *fifo, link);
1603                         if (rn == NULL)
1604                                 break;
1605                         destroy_restrict_node(rn);
1606                 }
1607                 free(fifo);
1608         }
1609 }
1610
1611
1612 static void
1613 destroy_setvar_fifo(
1614         setvar_fifo *   fifo
1615         )
1616 {
1617         setvar_node *   sv;
1618
1619         if (fifo != NULL) {
1620                 for (;;) {
1621                         UNLINK_FIFO(sv, *fifo, link);
1622                         if (sv == NULL)
1623                                 break;
1624                         free(sv->var);
1625                         free(sv->val);
1626                         free(sv);
1627                 }
1628                 free(fifo);
1629         }
1630 }
1631
1632
1633 static void
1634 destroy_addr_opts_fifo(
1635         addr_opts_fifo *        fifo
1636         )
1637 {
1638         addr_opts_node *        aon;
1639
1640         if (fifo != NULL) {
1641                 for (;;) {
1642                         UNLINK_FIFO(aon, *fifo, link);
1643                         if (aon == NULL)
1644                                 break;
1645                         destroy_address_node(aon->addr);
1646                         destroy_attr_val_fifo(aon->options);
1647                         free(aon);
1648                 }
1649                 free(fifo);
1650         }
1651 }
1652
1653
1654 setvar_node *
1655 create_setvar_node(
1656         char *  var,
1657         char *  val,
1658         int     isdefault
1659         )
1660 {
1661         setvar_node *   my_node;
1662         char *          pch;
1663
1664         /* do not allow = in the variable name */
1665         pch = strchr(var, '=');
1666         if (NULL != pch)
1667                 *pch = '\0';
1668
1669         /* Now store the string into a setvar_node */
1670         my_node = emalloc_zero(sizeof(*my_node));
1671         my_node->var = var;
1672         my_node->val = val;
1673         my_node->isdefault = isdefault;
1674
1675         return my_node;
1676 }
1677
1678
1679 nic_rule_node *
1680 create_nic_rule_node(
1681         int match_class,
1682         char *if_name,  /* interface name or numeric address */
1683         int action
1684         )
1685 {
1686         nic_rule_node *my_node;
1687
1688         REQUIRE(match_class != 0 || if_name != NULL);
1689
1690         my_node = emalloc_zero(sizeof(*my_node));
1691         my_node->match_class = match_class;
1692         my_node->if_name = if_name;
1693         my_node->action = action;
1694
1695         return my_node;
1696 }
1697
1698
1699 addr_opts_node *
1700 create_addr_opts_node(
1701         address_node *  addr,
1702         attr_val_fifo * options
1703         )
1704 {
1705         addr_opts_node *my_node;
1706
1707         my_node = emalloc_zero(sizeof(*my_node));
1708         my_node->addr = addr;
1709         my_node->options = options;
1710
1711         return my_node;
1712 }
1713
1714
1715 #ifdef SIM
1716 script_info *
1717 create_sim_script_info(
1718         double          duration,
1719         attr_val_fifo * script_queue
1720         )
1721 {
1722         script_info *my_info;
1723         attr_val *my_attr_val;
1724
1725         my_info = emalloc_zero(sizeof(*my_info));
1726
1727         /* Initialize Script Info with default values*/
1728         my_info->duration = duration;
1729         my_info->prop_delay = NET_DLY;
1730         my_info->proc_delay = PROC_DLY;
1731
1732         /* Traverse the script_queue and fill out non-default values */
1733
1734         for (my_attr_val = HEAD_PFIFO(script_queue);
1735              my_attr_val != NULL;
1736              my_attr_val = my_attr_val->link) {
1737
1738                 /* Set the desired value */
1739                 switch (my_attr_val->attr) {
1740
1741                 case T_Freq_Offset:
1742                         my_info->freq_offset = my_attr_val->value.d;
1743                         break;
1744
1745                 case T_Wander:
1746                         my_info->wander = my_attr_val->value.d;
1747                         break;
1748
1749                 case T_Jitter:
1750                         my_info->jitter = my_attr_val->value.d;
1751                         break;
1752
1753                 case T_Prop_Delay:
1754                         my_info->prop_delay = my_attr_val->value.d;
1755                         break;
1756
1757                 case T_Proc_Delay:
1758                         my_info->proc_delay = my_attr_val->value.d;
1759                         break;
1760
1761                 default:
1762                         msyslog(LOG_ERR, "Unknown script token %d",
1763                                 my_attr_val->attr);
1764                 }
1765         }
1766
1767         return my_info;
1768 }
1769 #endif  /* SIM */
1770
1771
1772 #ifdef SIM
1773 static sockaddr_u *
1774 get_next_address(
1775         address_node *addr
1776         )
1777 {
1778         const char addr_prefix[] = "192.168.0.";
1779         static int curr_addr_num = 1;
1780 #define ADDR_LENGTH 16 + 1      /* room for 192.168.1.255 */
1781         char addr_string[ADDR_LENGTH];
1782         sockaddr_u *final_addr;
1783         struct addrinfo *ptr;
1784         int gai_err;
1785
1786         final_addr = emalloc(sizeof(*final_addr));
1787
1788         if (addr->type == T_String) {
1789                 snprintf(addr_string, sizeof(addr_string), "%s%d",
1790                          addr_prefix, curr_addr_num++);
1791                 printf("Selecting ip address %s for hostname %s\n",
1792                        addr_string, addr->address);
1793                 gai_err = getaddrinfo(addr_string, "ntp", NULL, &ptr);
1794         } else {
1795                 gai_err = getaddrinfo(addr->address, "ntp", NULL, &ptr);
1796         }
1797
1798         if (gai_err) {
1799                 fprintf(stderr, "ERROR!! Could not get a new address\n");
1800                 exit(1);
1801         }
1802         memcpy(final_addr, ptr->ai_addr, ptr->ai_addrlen);
1803         fprintf(stderr, "Successful in setting ip address of simulated server to: %s\n",
1804                 stoa(final_addr));
1805         freeaddrinfo(ptr);
1806
1807         return final_addr;
1808 }
1809 #endif /* SIM */
1810
1811
1812 #ifdef SIM
1813 server_info *
1814 create_sim_server(
1815         address_node *          addr,
1816         double                  server_offset,
1817         script_info_fifo *      script
1818         )
1819 {
1820         server_info *my_info;
1821
1822         my_info = emalloc_zero(sizeof(*my_info));
1823         my_info->server_time = server_offset;
1824         my_info->addr = get_next_address(addr);
1825         my_info->script = script;
1826         UNLINK_FIFO(my_info->curr_script, *my_info->script, link);
1827
1828         return my_info;
1829 }
1830 #endif  /* SIM */
1831
1832 sim_node *
1833 create_sim_node(
1834         attr_val_fifo *         init_opts,
1835         server_info_fifo *      servers
1836         )
1837 {
1838         sim_node *my_node;
1839
1840         my_node = emalloc(sizeof(*my_node));
1841         my_node->init_opts = init_opts;
1842         my_node->servers = servers;
1843
1844         return my_node;
1845 }
1846
1847
1848
1849
1850 /* FUNCTIONS FOR PERFORMING THE CONFIGURATION
1851  * ------------------------------------------
1852  */
1853
1854 #ifndef SIM
1855 static void
1856 config_other_modes(
1857         config_tree *   ptree
1858         )
1859 {
1860         sockaddr_u      addr_sock;
1861         address_node *  addr_node;
1862
1863         if (ptree->broadcastclient)
1864                 proto_config(PROTO_BROADCLIENT, ptree->broadcastclient,
1865                              0., NULL);
1866
1867         addr_node = HEAD_PFIFO(ptree->manycastserver);
1868         while (addr_node != NULL) {
1869                 ZERO_SOCK(&addr_sock);
1870                 AF(&addr_sock) = addr_node->type;
1871                 if (1 == getnetnum(addr_node->address, &addr_sock, 1,
1872                                    t_UNK)) {
1873                         proto_config(PROTO_MULTICAST_ADD,
1874                                      0, 0., &addr_sock);
1875                         sys_manycastserver = 1;
1876                 }
1877                 addr_node = addr_node->link;
1878         }
1879
1880         /* Configure the multicast clients */
1881         addr_node = HEAD_PFIFO(ptree->multicastclient);
1882         if (addr_node != NULL) {
1883                 do {
1884                         ZERO_SOCK(&addr_sock);
1885                         AF(&addr_sock) = addr_node->type;
1886                         if (1 == getnetnum(addr_node->address,
1887                                            &addr_sock, 1, t_UNK)) {
1888                                 proto_config(PROTO_MULTICAST_ADD, 0, 0.,
1889                                              &addr_sock);
1890                         }
1891                         addr_node = addr_node->link;
1892                 } while (addr_node != NULL);
1893                 proto_config(PROTO_MULTICAST_ADD, 1, 0., NULL);
1894         }
1895 }
1896 #endif  /* !SIM */
1897
1898
1899 #ifdef FREE_CFG_T
1900 static void
1901 destroy_address_fifo(
1902         address_fifo *  pfifo
1903         )
1904 {
1905         address_node *  addr_node;
1906
1907         if (pfifo != NULL) {
1908                 for (;;) {
1909                         UNLINK_FIFO(addr_node, *pfifo, link);
1910                         if (addr_node == NULL)
1911                                 break;
1912                         destroy_address_node(addr_node);
1913                 }
1914                 free(pfifo);
1915         }
1916 }
1917
1918
1919 static void
1920 free_config_other_modes(
1921         config_tree *ptree
1922         )
1923 {
1924         FREE_ADDRESS_FIFO(ptree->manycastserver);
1925         FREE_ADDRESS_FIFO(ptree->multicastclient);
1926 }
1927 #endif  /* FREE_CFG_T */
1928
1929
1930 #ifndef SIM
1931 static void
1932 config_auth(
1933         config_tree *ptree
1934         )
1935 {
1936         attr_val *      my_val;
1937         int             first;
1938         int             last;
1939         int             i;
1940         int             count;
1941 #ifdef AUTOKEY
1942         int             item;
1943 #endif
1944
1945         /* Crypto Command */
1946 #ifdef AUTOKEY
1947         my_val = HEAD_PFIFO(ptree->auth.crypto_cmd_list);
1948         for (; my_val != NULL; my_val = my_val->link) {
1949                 switch (my_val->attr) {
1950
1951                 default:
1952                         fatal_error("config_auth: attr-token=%d", my_val->attr);
1953
1954                 case T_Host:
1955                         item = CRYPTO_CONF_PRIV;
1956                         break;
1957
1958                 case T_Ident:
1959                         item = CRYPTO_CONF_IDENT;
1960                         break;
1961
1962                 case T_Pw:
1963                         item = CRYPTO_CONF_PW;
1964                         break;
1965
1966                 case T_Randfile:
1967                         item = CRYPTO_CONF_RAND;
1968                         break;
1969
1970                 case T_Digest:
1971                         item = CRYPTO_CONF_NID;
1972                         break;
1973                 }
1974                 crypto_config(item, my_val->value.s);
1975         }
1976 #endif  /* AUTOKEY */
1977
1978         /* Keysdir Command */
1979         if (ptree->auth.keysdir) {
1980                 if (keysdir != default_keysdir)
1981                         free(keysdir);
1982                 keysdir = estrdup(ptree->auth.keysdir);
1983         }
1984
1985
1986         /* ntp_signd_socket Command */
1987         if (ptree->auth.ntp_signd_socket) {
1988                 if (ntp_signd_socket != default_ntp_signd_socket)
1989                         free(ntp_signd_socket);
1990                 ntp_signd_socket = estrdup(ptree->auth.ntp_signd_socket);
1991         }
1992
1993 #ifdef AUTOKEY
1994         if (ptree->auth.cryptosw && !cryptosw) {
1995                 crypto_setup();
1996                 cryptosw = 1;
1997         }
1998 #endif  /* AUTOKEY */
1999
2000         /*
2001          * Count the number of trusted keys to preallocate storage and
2002          * size the hash table.
2003          */
2004         count = 0;
2005         my_val = HEAD_PFIFO(ptree->auth.trusted_key_list);
2006         for (; my_val != NULL; my_val = my_val->link) {
2007                 if (T_Integer == my_val->type) {
2008                         first = my_val->value.i;
2009                         if (first > 1 && first <= NTP_MAXKEY)
2010                                 count++;
2011                 } else {
2012                         REQUIRE(T_Intrange == my_val->type);
2013                         first = my_val->value.r.first;
2014                         last = my_val->value.r.last;
2015                         if (!(first > last || first < 1 ||
2016                             last > NTP_MAXKEY)) {
2017                                 count += 1 + last - first;
2018                         }
2019                 }
2020         }
2021         auth_prealloc_symkeys(count);
2022
2023         /* Keys Command */
2024         if (ptree->auth.keys)
2025                 getauthkeys(ptree->auth.keys);
2026
2027         /* Control Key Command */
2028         if (ptree->auth.control_key)
2029                 ctl_auth_keyid = (keyid_t)ptree->auth.control_key;
2030
2031         /* Requested Key Command */
2032         if (ptree->auth.request_key) {
2033                 DPRINTF(4, ("set info_auth_keyid to %08lx\n",
2034                             (u_long) ptree->auth.request_key));
2035                 info_auth_keyid = (keyid_t)ptree->auth.request_key;
2036         }
2037
2038         /* Trusted Key Command */
2039         my_val = HEAD_PFIFO(ptree->auth.trusted_key_list);
2040         for (; my_val != NULL; my_val = my_val->link) {
2041                 if (T_Integer == my_val->type) {
2042                         first = my_val->value.i;
2043                         if (first >= 1 && first <= NTP_MAXKEY) {
2044                                 authtrust(first, TRUE);
2045                         } else {
2046                                 msyslog(LOG_NOTICE,
2047                                         "Ignoring invalid trustedkey %d, min 1 max %d.",
2048                                         first, NTP_MAXKEY);
2049                         }
2050                 } else {
2051                         first = my_val->value.r.first;
2052                         last = my_val->value.r.last;
2053                         if (first > last || first < 1 ||
2054                             last > NTP_MAXKEY) {
2055                                 msyslog(LOG_NOTICE,
2056                                         "Ignoring invalid trustedkey range %d ... %d, min 1 max %d.",
2057                                         first, last, NTP_MAXKEY);
2058                         } else {
2059                                 for (i = first; i <= last; i++) {
2060                                         authtrust(i, TRUE);
2061                                 }
2062                         }
2063                 }
2064         }
2065
2066 #ifdef AUTOKEY
2067         /* crypto revoke command */
2068         if (ptree->auth.revoke)
2069                 sys_revoke = 1UL << ptree->auth.revoke;
2070 #endif  /* AUTOKEY */
2071 }
2072 #endif  /* !SIM */
2073
2074
2075 #ifdef FREE_CFG_T
2076 static void
2077 free_config_auth(
2078         config_tree *ptree
2079         )
2080 {
2081         destroy_attr_val_fifo(ptree->auth.crypto_cmd_list);
2082         ptree->auth.crypto_cmd_list = NULL;
2083         destroy_attr_val_fifo(ptree->auth.trusted_key_list);
2084         ptree->auth.trusted_key_list = NULL;
2085 }
2086 #endif  /* FREE_CFG_T */
2087
2088
2089 /* Configure low-level clock-related parameters. Return TRUE if the
2090  * clock might need adjustment like era-checking after the call, FALSE
2091  * otherwise.
2092  */
2093 static int/*BOOL*/
2094 config_tos_clock(
2095         config_tree *ptree
2096         )
2097 {
2098         int             ret;
2099         attr_val *      tos;
2100
2101         ret = FALSE;
2102         tos = HEAD_PFIFO(ptree->orphan_cmds);
2103         for (; tos != NULL; tos = tos->link) {
2104                 switch(tos->attr) {
2105
2106                 default:
2107                         break;
2108
2109                 case T_Basedate:
2110                         basedate_set_day(tos->value.i);
2111                         ret = TRUE;
2112                         break;
2113                 }
2114         }
2115         return ret;
2116 }
2117
2118 static void
2119 config_tos(
2120         config_tree *ptree
2121         )
2122 {
2123         attr_val *      tos;
2124         int             item;
2125         double          val;
2126
2127         /* [Bug 2896] For the daemon to work properly it is essential
2128          * that minsane < minclock <= maxclock.
2129          *
2130          * If either constraint is violated, the daemon will be or might
2131          * become dysfunctional. Fixing the values is too fragile here,
2132          * since three variables with interdependecies are involved. We
2133          * just log an error but do not stop: This might be caused by
2134          * remote config, and it might be fixed by remote config, too.
2135          */
2136         int l_maxclock = sys_maxclock;
2137         int l_minclock = sys_minclock;
2138         int l_minsane  = sys_minsane;
2139
2140         /* -*- phase one: inspect / sanitize the values */
2141         tos = HEAD_PFIFO(ptree->orphan_cmds);
2142         for (; tos != NULL; tos = tos->link) {
2143                 /* not all attributes are doubles (any more), so loading
2144                  * 'val' in all cases is not a good idea: It should be
2145                  * done as needed in every case processed here.
2146                  */
2147                 switch(tos->attr) {
2148                 default:
2149                         break;
2150
2151                 case T_Bcpollbstep:
2152                         val = tos->value.d;
2153                         if (val > 4) {
2154                                 msyslog(LOG_WARNING,
2155                                         "Using maximum bcpollbstep ceiling %d, %d requested",
2156                                         4, (int)val);
2157                                 tos->value.d = 4;
2158                         } else if (val < 0) {
2159                                 msyslog(LOG_WARNING,
2160                                         "Using minimum bcpollbstep floor %d, %d requested",
2161                                         0, (int)val);
2162                                 tos->value.d = 0;
2163                         }
2164                         break;
2165
2166                 case T_Ceiling:
2167                         val = tos->value.d;
2168                         if (val > STRATUM_UNSPEC - 1) {
2169                                 msyslog(LOG_WARNING,
2170                                         "Using maximum tos ceiling %d, %d requested",
2171                                         STRATUM_UNSPEC - 1, (int)val);
2172                                 tos->value.d = STRATUM_UNSPEC - 1;
2173                         } else if (val < 1) {
2174                                 msyslog(LOG_WARNING,
2175                                         "Using minimum tos floor %d, %d requested",
2176                                         1, (int)val);
2177                                 tos->value.d = 1;
2178                         }
2179                         break;
2180
2181                 case T_Minclock:
2182                         val = tos->value.d;
2183                         if ((int)tos->value.d < 1)
2184                                 tos->value.d = 1;
2185                         l_minclock = (int)tos->value.d;
2186                         break;
2187
2188                 case T_Maxclock:
2189                         val = tos->value.d;
2190                         if ((int)tos->value.d < 1)
2191                                 tos->value.d = 1;
2192                         l_maxclock = (int)tos->value.d;
2193                         break;
2194
2195                 case T_Minsane:
2196                         val = tos->value.d;
2197                         if ((int)tos->value.d < 1)
2198                                 tos->value.d = 1;
2199                         l_minsane = (int)tos->value.d;
2200                         break;
2201                 }
2202         }
2203
2204         if ( ! (l_minsane < l_minclock && l_minclock <= l_maxclock)) {
2205                 msyslog(LOG_ERR,
2206                         "tos error: must have minsane (%d) < minclock (%d) <= maxclock (%d)"
2207                         " - daemon will not operate properly!",
2208                         l_minsane, l_minclock, l_maxclock);
2209         }
2210
2211         /* -*- phase two: forward the values to the protocol machinery */
2212         tos = HEAD_PFIFO(ptree->orphan_cmds);
2213         for (; tos != NULL; tos = tos->link) {
2214                 switch(tos->attr) {
2215
2216                 default:
2217                         fatal_error("config-tos: attr-token=%d", tos->attr);
2218
2219                 case T_Bcpollbstep:
2220                         item = PROTO_BCPOLLBSTEP;
2221                         break;
2222
2223                 case T_Ceiling:
2224                         item = PROTO_CEILING;
2225                         break;
2226
2227                 case T_Floor:
2228                         item = PROTO_FLOOR;
2229                         break;
2230
2231                 case T_Cohort:
2232                         item = PROTO_COHORT;
2233                         break;
2234
2235                 case T_Orphan:
2236                         item = PROTO_ORPHAN;
2237                         break;
2238
2239                 case T_Orphanwait:
2240                         item = PROTO_ORPHWAIT;
2241                         break;
2242
2243                 case T_Mindist:
2244                         item = PROTO_MINDISP;
2245                         break;
2246
2247                 case T_Maxdist:
2248                         item = PROTO_MAXDIST;
2249                         break;
2250
2251                 case T_Minclock:
2252                         item = PROTO_MINCLOCK;
2253                         break;
2254
2255                 case T_Maxclock:
2256                         item = PROTO_MAXCLOCK;
2257                         break;
2258
2259                 case T_Minsane:
2260                         item = PROTO_MINSANE;
2261                         break;
2262
2263                 case T_Beacon:
2264                         item = PROTO_BEACON;
2265                         break;
2266
2267                 case T_Basedate:
2268                         continue; /* SKIP proto-config for this! */
2269                 }
2270                 proto_config(item, 0, tos->value.d, NULL);
2271         }
2272 }
2273
2274
2275 #ifdef FREE_CFG_T
2276 static void
2277 free_config_tos(
2278         config_tree *ptree
2279         )
2280 {
2281         FREE_ATTR_VAL_FIFO(ptree->orphan_cmds);
2282 }
2283 #endif  /* FREE_CFG_T */
2284
2285
2286 static void
2287 config_monitor(
2288         config_tree *ptree
2289         )
2290 {
2291         int_node *pfilegen_token;
2292         const char *filegen_string;
2293         const char *filegen_file;
2294         FILEGEN *filegen;
2295         filegen_node *my_node;
2296         attr_val *my_opts;
2297         int filegen_type;
2298         int filegen_flag;
2299
2300         /* Set the statistics directory */
2301         if (ptree->stats_dir)
2302                 stats_config(STATS_STATSDIR, ptree->stats_dir);
2303
2304         /* NOTE:
2305          * Calling filegen_get is brain dead. Doing a string
2306          * comparison to find the relavant filegen structure is
2307          * expensive.
2308          *
2309          * Through the parser, we already know which filegen is
2310          * being specified. Hence, we should either store a
2311          * pointer to the specified structure in the syntax tree
2312          * or an index into a filegen array.
2313          *
2314          * Need to change the filegen code to reflect the above.
2315          */
2316
2317         /* Turn on the specified statistics */
2318         pfilegen_token = HEAD_PFIFO(ptree->stats_list);
2319         for (; pfilegen_token != NULL; pfilegen_token = pfilegen_token->link) {
2320                 filegen_string = keyword(pfilegen_token->i);
2321                 filegen = filegen_get(filegen_string);
2322                 if (NULL == filegen) {
2323                         msyslog(LOG_ERR,
2324                                 "stats %s unrecognized",
2325                                 filegen_string);
2326                         continue;
2327                 }
2328                 DPRINTF(4, ("enabling filegen for %s statistics '%s%s'\n",
2329                             filegen_string, filegen->dir,
2330                             filegen->fname));
2331                 filegen_flag = filegen->flag;
2332                 filegen_flag |= FGEN_FLAG_ENABLED;
2333                 filegen_config(filegen, statsdir, filegen_string,
2334                                filegen->type, filegen_flag);
2335         }
2336
2337         /* Configure the statistics with the options */
2338         my_node = HEAD_PFIFO(ptree->filegen_opts);
2339         for (; my_node != NULL; my_node = my_node->link) {
2340                 filegen_string = keyword(my_node->filegen_token);
2341                 filegen = filegen_get(filegen_string);
2342                 if (NULL == filegen) {
2343                         msyslog(LOG_ERR,
2344                                 "filegen category '%s' unrecognized",
2345                                 filegen_string);
2346                         continue;
2347                 }
2348                 filegen_file = filegen_string;
2349
2350                 /* Initialize the filegen variables to their pre-configuration states */
2351                 filegen_flag = filegen->flag;
2352                 filegen_type = filegen->type;
2353
2354                 /* "filegen ... enabled" is the default (when filegen is used) */
2355                 filegen_flag |= FGEN_FLAG_ENABLED;
2356
2357                 my_opts = HEAD_PFIFO(my_node->options);
2358                 for (; my_opts != NULL; my_opts = my_opts->link) {
2359                         switch (my_opts->attr) {
2360
2361                         case T_File:
2362                                 filegen_file = my_opts->value.s;
2363                                 break;
2364
2365                         case T_Type:
2366                                 switch (my_opts->value.i) {
2367
2368                                 default:
2369                                         fatal_error("config-monitor: type-token=%d", my_opts->value.i);
2370
2371                                 case T_None:
2372                                         filegen_type = FILEGEN_NONE;
2373                                         break;
2374
2375                                 case T_Pid:
2376                                         filegen_type = FILEGEN_PID;
2377                                         break;
2378
2379                                 case T_Day:
2380                                         filegen_type = FILEGEN_DAY;
2381                                         break;
2382
2383                                 case T_Week:
2384                                         filegen_type = FILEGEN_WEEK;
2385                                         break;
2386
2387                                 case T_Month:
2388                                         filegen_type = FILEGEN_MONTH;
2389                                         break;
2390
2391                                 case T_Year:
2392                                         filegen_type = FILEGEN_YEAR;
2393                                         break;
2394
2395                                 case T_Age:
2396                                         filegen_type = FILEGEN_AGE;
2397                                         break;
2398                                 }
2399                                 break;
2400
2401                         case T_Flag:
2402                                 switch (my_opts->value.i) {
2403
2404                                 case T_Link:
2405                                         filegen_flag |= FGEN_FLAG_LINK;
2406                                         break;
2407
2408                                 case T_Nolink:
2409                                         filegen_flag &= ~FGEN_FLAG_LINK;
2410                                         break;
2411
2412                                 case T_Enable:
2413                                         filegen_flag |= FGEN_FLAG_ENABLED;
2414                                         break;
2415
2416                                 case T_Disable:
2417                                         filegen_flag &= ~FGEN_FLAG_ENABLED;
2418                                         break;
2419
2420                                 default:
2421                                         msyslog(LOG_ERR,
2422                                                 "Unknown filegen flag token %d",
2423                                                 my_opts->value.i);
2424                                         exit(1);
2425                                 }
2426                                 break;
2427
2428                         default:
2429                                 msyslog(LOG_ERR,
2430                                         "Unknown filegen option token %d",
2431                                         my_opts->attr);
2432                                 exit(1);
2433                         }
2434                 }
2435                 filegen_config(filegen, statsdir, filegen_file,
2436                                filegen_type, filegen_flag);
2437         }
2438 }
2439
2440
2441 #ifdef FREE_CFG_T
2442 static void
2443 free_config_monitor(
2444         config_tree *ptree
2445         )
2446 {
2447         if (ptree->stats_dir) {
2448                 free(ptree->stats_dir);
2449                 ptree->stats_dir = NULL;
2450         }
2451
2452         FREE_INT_FIFO(ptree->stats_list);
2453         FREE_FILEGEN_FIFO(ptree->filegen_opts);
2454 }
2455 #endif  /* FREE_CFG_T */
2456
2457
2458 #ifndef SIM
2459 static void
2460 config_access(
2461         config_tree *ptree
2462         )
2463 {
2464         static int              warned_signd;
2465         attr_val *              my_opt;
2466         restrict_node *         my_node;
2467         int_node *              curr_tok_fifo;
2468         sockaddr_u              addr;
2469         sockaddr_u              mask;
2470         struct addrinfo         hints;
2471         struct addrinfo *       ai_list;
2472         struct addrinfo *       pai;
2473         int                     rc;
2474         int                     restrict_default;
2475         u_short                 rflags;
2476         u_short                 mflags;
2477         short                   ippeerlimit;
2478         int                     range_err;
2479         const char *            signd_warning =
2480 #ifdef HAVE_NTP_SIGND
2481             "MS-SNTP signd operations currently block ntpd degrading service to all clients.";
2482 #else
2483             "mssntp restrict bit ignored, this ntpd was configured without --enable-ntp-signd.";
2484 #endif
2485
2486         /* Configure the mru options */
2487         my_opt = HEAD_PFIFO(ptree->mru_opts);
2488         for (; my_opt != NULL; my_opt = my_opt->link) {
2489
2490                 range_err = FALSE;
2491
2492                 switch (my_opt->attr) {
2493
2494                 case T_Incalloc:
2495                         if (0 <= my_opt->value.i)
2496                                 mru_incalloc = my_opt->value.u;
2497                         else
2498                                 range_err = TRUE;
2499                         break;
2500
2501                 case T_Incmem:
2502                         if (0 <= my_opt->value.i)
2503                                 mru_incalloc = (my_opt->value.u * 1024U)
2504                                                 / sizeof(mon_entry);
2505                         else
2506                                 range_err = TRUE;
2507                         break;
2508
2509                 case T_Initalloc:
2510                         if (0 <= my_opt->value.i)
2511                                 mru_initalloc = my_opt->value.u;
2512                         else
2513                                 range_err = TRUE;
2514                         break;
2515
2516                 case T_Initmem:
2517                         if (0 <= my_opt->value.i)
2518                                 mru_initalloc = (my_opt->value.u * 1024U)
2519                                                  / sizeof(mon_entry);
2520                         else
2521                                 range_err = TRUE;
2522                         break;
2523
2524                 case T_Mindepth:
2525                         if (0 <= my_opt->value.i)
2526                                 mru_mindepth = my_opt->value.u;
2527                         else
2528                                 range_err = TRUE;
2529                         break;
2530
2531                 case T_Maxage:
2532                         mru_maxage = my_opt->value.i;
2533                         break;
2534
2535                 case T_Maxdepth:
2536                         if (0 <= my_opt->value.i)
2537                                 mru_maxdepth = my_opt->value.u;
2538                         else
2539                                 mru_maxdepth = UINT_MAX;
2540                         break;
2541
2542                 case T_Maxmem:
2543                         if (0 <= my_opt->value.i)
2544                                 mru_maxdepth = (my_opt->value.u * 1024U) /
2545                                                sizeof(mon_entry);
2546                         else
2547                                 mru_maxdepth = UINT_MAX;
2548                         break;
2549
2550                 default:
2551                         msyslog(LOG_ERR,
2552                                 "Unknown mru option %s (%d)",
2553                                 keyword(my_opt->attr), my_opt->attr);
2554                         exit(1);
2555                 }
2556                 if (range_err)
2557                         msyslog(LOG_ERR,
2558                                 "mru %s %d out of range, ignored.",
2559                                 keyword(my_opt->attr), my_opt->value.i);
2560         }
2561
2562         /* Configure the discard options */
2563         my_opt = HEAD_PFIFO(ptree->discard_opts);
2564         for (; my_opt != NULL; my_opt = my_opt->link) {
2565
2566                 switch (my_opt->attr) {
2567
2568                 case T_Average:
2569                         if (0 <= my_opt->value.i &&
2570                             my_opt->value.i <= UCHAR_MAX)
2571                                 ntp_minpoll = (u_char)my_opt->value.u;
2572                         else
2573                                 msyslog(LOG_ERR,
2574                                         "discard average %d out of range, ignored.",
2575                                         my_opt->value.i);
2576                         break;
2577
2578                 case T_Minimum:
2579                         ntp_minpkt = my_opt->value.i;
2580                         break;
2581
2582                 case T_Monitor:
2583                         mon_age = my_opt->value.i;
2584                         break;
2585
2586                 default:
2587                         msyslog(LOG_ERR,
2588                                 "Unknown discard option %s (%d)",
2589                                 keyword(my_opt->attr), my_opt->attr);
2590                         exit(1);
2591                 }
2592         }
2593
2594         /* Configure the restrict options */
2595         my_node = HEAD_PFIFO(ptree->restrict_opts);
2596
2597         for (; my_node != NULL; my_node = my_node->link) {
2598                 /* Grab the ippeerlmit */
2599                 ippeerlimit = my_node->ippeerlimit;
2600
2601 DPRINTF(1, ("config_access: top-level node %p: ippeerlimit %d\n", my_node, ippeerlimit));
2602
2603                 /* Parse the flags */
2604                 rflags = 0;
2605                 mflags = 0;
2606
2607                 curr_tok_fifo = HEAD_PFIFO(my_node->flag_tok_fifo);
2608                 for (; curr_tok_fifo != NULL; curr_tok_fifo = curr_tok_fifo->link) {
2609                         switch (curr_tok_fifo->i) {
2610
2611                         default:
2612                                 fatal_error("config_access: flag-type-token=%d", curr_tok_fifo->i);
2613
2614                         case T_Ntpport:
2615                                 mflags |= RESM_NTPONLY;
2616                                 break;
2617
2618                         case T_Source:
2619                                 mflags |= RESM_SOURCE;
2620                                 break;
2621
2622                         case T_Flake:
2623                                 rflags |= RES_FLAKE;
2624                                 break;
2625
2626                         case T_Ignore:
2627                                 rflags |= RES_IGNORE;
2628                                 break;
2629
2630                         case T_Kod:
2631                                 rflags |= RES_KOD;
2632                                 break;
2633
2634                         case T_Mssntp:
2635                                 rflags |= RES_MSSNTP;
2636                                 break;
2637
2638                         case T_Limited:
2639                                 rflags |= RES_LIMITED;
2640                                 break;
2641
2642                         case T_Lowpriotrap:
2643                                 rflags |= RES_LPTRAP;
2644                                 break;
2645
2646                         case T_Nomodify:
2647                                 rflags |= RES_NOMODIFY;
2648                                 break;
2649
2650                         case T_Nomrulist:
2651                                 rflags |= RES_NOMRULIST;
2652                                 break;
2653
2654                         case T_Noepeer:
2655                                 rflags |= RES_NOEPEER;
2656                                 break;
2657
2658                         case T_Nopeer:
2659                                 rflags |= RES_NOPEER;
2660                                 break;
2661
2662                         case T_Noquery:
2663                                 rflags |= RES_NOQUERY;
2664                                 break;
2665
2666                         case T_Noserve:
2667                                 rflags |= RES_DONTSERVE;
2668                                 break;
2669
2670                         case T_Notrap:
2671                                 rflags |= RES_NOTRAP;
2672                                 break;
2673
2674                         case T_Notrust:
2675                                 rflags |= RES_DONTTRUST;
2676                                 break;
2677
2678                         case T_Version:
2679                                 rflags |= RES_VERSION;
2680                                 break;
2681                         }
2682                 }
2683
2684                 if ((RES_MSSNTP & rflags) && !warned_signd) {
2685                         warned_signd = 1;
2686                         fprintf(stderr, "%s\n", signd_warning);
2687                         msyslog(LOG_WARNING, "%s", signd_warning);
2688                 }
2689
2690                 /* It would be swell if we could identify the line number */
2691                 if ((RES_KOD & rflags) && !(RES_LIMITED & rflags)) {
2692                         const char *kod_where = (my_node->addr)
2693                                           ? my_node->addr->address
2694                                           : (mflags & RESM_SOURCE)
2695                                             ? "source"
2696                                             : "default";
2697                         const char *kod_warn = "KOD does nothing without LIMITED.";
2698
2699                         fprintf(stderr, "restrict %s: %s\n", kod_where, kod_warn);
2700                         msyslog(LOG_WARNING, "restrict %s: %s", kod_where, kod_warn);
2701                 }
2702
2703                 ZERO_SOCK(&addr);
2704                 ai_list = NULL;
2705                 pai = NULL;
2706                 restrict_default = 0;
2707
2708                 if (NULL == my_node->addr) {
2709                         ZERO_SOCK(&mask);
2710                         if (!(RESM_SOURCE & mflags)) {
2711                                 /*
2712                                  * The user specified a default rule
2713                                  * without a -4 / -6 qualifier, add to
2714                                  * both lists
2715                                  */
2716                                 restrict_default = 1;
2717                         } else {
2718                                 /* apply "restrict source ..." */
2719                                 DPRINTF(1, ("restrict source template ippeerlimit %d mflags %x rflags %x\n",
2720                                         ippeerlimit, mflags, rflags));
2721                                 hack_restrict(RESTRICT_FLAGS, NULL, NULL,
2722                                               ippeerlimit, mflags, rflags, 0);
2723                                 continue;
2724                         }
2725                 } else {
2726                         /* Resolve the specified address */
2727                         AF(&addr) = (u_short)my_node->addr->type;
2728
2729                         if (getnetnum(my_node->addr->address,
2730                                       &addr, 1, t_UNK) != 1) {
2731                                 /*
2732                                  * Attempt a blocking lookup.  This
2733                                  * is in violation of the nonblocking
2734                                  * design of ntpd's mainline code.  The
2735                                  * alternative of running without the
2736                                  * restriction until the name resolved
2737                                  * seems worse.
2738                                  * Ideally some scheme could be used for
2739                                  * restrict directives in the startup
2740                                  * ntp.conf to delay starting up the
2741                                  * protocol machinery until after all
2742                                  * restrict hosts have been resolved.
2743                                  */
2744                                 ai_list = NULL;
2745                                 ZERO(hints);
2746                                 hints.ai_protocol = IPPROTO_UDP;
2747                                 hints.ai_socktype = SOCK_DGRAM;
2748                                 hints.ai_family = my_node->addr->type;
2749                                 rc = getaddrinfo(my_node->addr->address,
2750                                                  "ntp", &hints,
2751                                                  &ai_list);
2752                                 if (rc) {
2753                                         msyslog(LOG_ERR,
2754                                                 "restrict: ignoring line %d, address/host '%s' unusable.",
2755                                                 my_node->line_no,
2756                                                 my_node->addr->address);
2757                                         continue;
2758                                 }
2759                                 INSIST(ai_list != NULL);
2760                                 pai = ai_list;
2761                                 INSIST(pai->ai_addr != NULL);
2762                                 INSIST(sizeof(addr) >=
2763                                            pai->ai_addrlen);
2764                                 memcpy(&addr, pai->ai_addr,
2765                                        pai->ai_addrlen);
2766                                 INSIST(AF_INET == AF(&addr) ||
2767                                            AF_INET6 == AF(&addr));
2768                         }
2769
2770                         SET_HOSTMASK(&mask, AF(&addr));
2771
2772                         /* Resolve the mask */
2773                         if (my_node->mask) {
2774                                 ZERO_SOCK(&mask);
2775                                 AF(&mask) = my_node->mask->type;
2776                                 if (getnetnum(my_node->mask->address,
2777                                               &mask, 1, t_MSK) != 1) {
2778                                         msyslog(LOG_ERR,
2779                                                 "restrict: ignoring line %d, mask '%s' unusable.",
2780                                                 my_node->line_no,
2781                                                 my_node->mask->address);
2782                                         continue;
2783                                 }
2784                         }
2785                 }
2786
2787                 /* Set the flags */
2788                 if (restrict_default) {
2789                         AF(&addr) = AF_INET;
2790                         AF(&mask) = AF_INET;
2791                         hack_restrict(RESTRICT_FLAGS, &addr, &mask,
2792                                       ippeerlimit, mflags, rflags, 0);
2793                         AF(&addr) = AF_INET6;
2794                         AF(&mask) = AF_INET6;
2795                 }
2796
2797                 do {
2798                         hack_restrict(RESTRICT_FLAGS, &addr, &mask,
2799                                       ippeerlimit, mflags, rflags, 0);
2800                         if (pai != NULL &&
2801                             NULL != (pai = pai->ai_next)) {
2802                                 INSIST(pai->ai_addr != NULL);
2803                                 INSIST(sizeof(addr) >=
2804                                            pai->ai_addrlen);
2805                                 ZERO_SOCK(&addr);
2806                                 memcpy(&addr, pai->ai_addr,
2807                                        pai->ai_addrlen);
2808                                 INSIST(AF_INET == AF(&addr) ||
2809                                            AF_INET6 == AF(&addr));
2810                                 SET_HOSTMASK(&mask, AF(&addr));
2811                         }
2812                 } while (pai != NULL);
2813
2814                 if (ai_list != NULL)
2815                         freeaddrinfo(ai_list);
2816         }
2817 }
2818 #endif  /* !SIM */
2819
2820
2821 #ifdef FREE_CFG_T
2822 static void
2823 free_config_access(
2824         config_tree *ptree
2825         )
2826 {
2827         FREE_ATTR_VAL_FIFO(ptree->mru_opts);
2828         FREE_ATTR_VAL_FIFO(ptree->discard_opts);
2829         FREE_RESTRICT_FIFO(ptree->restrict_opts);
2830 }
2831 #endif  /* FREE_CFG_T */
2832
2833
2834 static void
2835 config_rlimit(
2836         config_tree *ptree
2837         )
2838 {
2839         attr_val *      rlimit_av;
2840
2841         rlimit_av = HEAD_PFIFO(ptree->rlimit);
2842         for (; rlimit_av != NULL; rlimit_av = rlimit_av->link) {
2843                 switch (rlimit_av->attr) {
2844
2845                 default:
2846                         fatal_error("config-rlimit: value-token=%d", rlimit_av->attr);
2847
2848                 case T_Memlock:
2849                         /* What if we HAVE_OPT(SAVECONFIGQUIT) ? */
2850                         if (HAVE_OPT( SAVECONFIGQUIT )) {
2851                                 break;
2852                         }
2853                         if (rlimit_av->value.i == -1) {
2854 # if defined(HAVE_MLOCKALL)
2855                                 if (cur_memlock != 0) {
2856                                         if (-1 == munlockall()) {
2857                                                 msyslog(LOG_ERR, "munlockall() failed: %m");
2858                                         }
2859                                 }
2860                                 cur_memlock = 0;
2861 # endif /* HAVE_MLOCKALL */
2862                         } else if (rlimit_av->value.i >= 0) {
2863 #if defined(RLIMIT_MEMLOCK)
2864 # if defined(HAVE_MLOCKALL)
2865                                 if (cur_memlock != 1) {
2866                                         if (-1 == mlockall(MCL_CURRENT|MCL_FUTURE)) {
2867                                                 msyslog(LOG_ERR, "mlockall() failed: %m");
2868                                         }
2869                                 }
2870 # endif /* HAVE_MLOCKALL */
2871                                 ntp_rlimit(RLIMIT_MEMLOCK,
2872                                            (rlim_t)(rlimit_av->value.i * 1024 * 1024),
2873                                            1024 * 1024,
2874                                            "MB");
2875                                 cur_memlock = 1;
2876 #else
2877                                 /* STDERR as well would be fine... */
2878                                 msyslog(LOG_WARNING, "'rlimit memlock' specified but is not available on this system.");
2879 #endif /* RLIMIT_MEMLOCK */
2880                         } else {
2881                                 msyslog(LOG_WARNING, "'rlimit memlock' value of %d is unexpected!", rlimit_av->value.i);
2882                         }
2883                         break;
2884
2885                 case T_Stacksize:
2886 #if defined(RLIMIT_STACK)
2887                         ntp_rlimit(RLIMIT_STACK,
2888                                    (rlim_t)(rlimit_av->value.i * 4096),
2889                                    4096,
2890                                    "4k");
2891 #else
2892                         /* STDERR as well would be fine... */
2893                         msyslog(LOG_WARNING, "'rlimit stacksize' specified but is not available on this system.");
2894 #endif /* RLIMIT_STACK */
2895                         break;
2896
2897                 case T_Filenum:
2898 #if defined(RLIMIT_NOFILE)
2899                         ntp_rlimit(RLIMIT_NOFILE,
2900                                   (rlim_t)(rlimit_av->value.i),
2901                                   1,
2902                                   "");
2903 #else
2904                         /* STDERR as well would be fine... */
2905                         msyslog(LOG_WARNING, "'rlimit filenum' specified but is not available on this system.");
2906 #endif /* RLIMIT_NOFILE */
2907                         break;
2908
2909                 }
2910         }
2911 }
2912
2913
2914 static void
2915 config_tinker(
2916         config_tree *ptree
2917         )
2918 {
2919         attr_val *      tinker;
2920         int             item;
2921
2922         tinker = HEAD_PFIFO(ptree->tinker);
2923         for (; tinker != NULL; tinker = tinker->link) {
2924                 switch (tinker->attr) {
2925
2926                 default:
2927                         fatal_error("config_tinker: attr-token=%d", tinker->attr);
2928
2929                 case T_Allan:
2930                         item = LOOP_ALLAN;
2931                         break;
2932
2933                 case T_Dispersion:
2934                         item = LOOP_PHI;
2935                         break;
2936
2937                 case T_Freq:
2938                         item = LOOP_FREQ;
2939                         break;
2940
2941                 case T_Huffpuff:
2942                         item = LOOP_HUFFPUFF;
2943                         break;
2944
2945                 case T_Panic:
2946                         item = LOOP_PANIC;
2947                         break;
2948
2949                 case T_Step:
2950                         item = LOOP_MAX;
2951                         break;
2952
2953                 case T_Stepback:
2954                         item = LOOP_MAX_BACK;
2955                         break;
2956
2957                 case T_Stepfwd:
2958                         item = LOOP_MAX_FWD;
2959                         break;
2960
2961                 case T_Stepout:
2962                         item = LOOP_MINSTEP;
2963                         break;
2964
2965                 case T_Tick:
2966                         item = LOOP_TICK;
2967                         break;
2968                 }
2969                 loop_config(item, tinker->value.d);
2970         }
2971 }
2972
2973
2974 #ifdef FREE_CFG_T
2975 static void
2976 free_config_rlimit(
2977         config_tree *ptree
2978         )
2979 {
2980         FREE_ATTR_VAL_FIFO(ptree->rlimit);
2981 }
2982
2983 static void
2984 free_config_tinker(
2985         config_tree *ptree
2986         )
2987 {
2988         FREE_ATTR_VAL_FIFO(ptree->tinker);
2989 }
2990 #endif  /* FREE_CFG_T */
2991
2992
2993 /*
2994  * config_nic_rules - apply interface listen/ignore/drop items
2995  */
2996 #ifndef SIM
2997 static void
2998 config_nic_rules(
2999         config_tree *ptree,
3000         int/*BOOL*/ input_from_file
3001         )
3002 {
3003         nic_rule_node * curr_node;
3004         sockaddr_u      addr;
3005         nic_rule_match  match_type;
3006         nic_rule_action action;
3007         char *          if_name;
3008         char *          pchSlash;
3009         int             prefixlen;
3010         int             addrbits;
3011
3012         curr_node = HEAD_PFIFO(ptree->nic_rules);
3013
3014         if (curr_node != NULL
3015             && (HAVE_OPT( NOVIRTUALIPS ) || HAVE_OPT( INTERFACE ))) {
3016                 msyslog(LOG_ERR,
3017                         "interface/nic rules are not allowed with --interface (-I) or --novirtualips (-L)%s",
3018                         (input_from_file) ? ", exiting" : "");
3019                 if (input_from_file)
3020                         exit(1);
3021                 else
3022                         return;
3023         }
3024
3025         for (; curr_node != NULL; curr_node = curr_node->link) {
3026                 prefixlen = -1;
3027                 if_name = curr_node->if_name;
3028                 if (if_name != NULL)
3029                         if_name = estrdup(if_name);
3030
3031                 switch (curr_node->match_class) {
3032
3033                 default:
3034                         fatal_error("config_nic_rules: match-class-token=%d", curr_node->match_class);
3035
3036                 case 0:
3037                         /*
3038                          * 0 is out of range for valid token T_...
3039                          * and in a nic_rules_node indicates the
3040                          * interface descriptor is either a name or
3041                          * address, stored in if_name in either case.
3042                          */
3043                         INSIST(if_name != NULL);
3044                         pchSlash = strchr(if_name, '/');
3045                         if (pchSlash != NULL)
3046                                 *pchSlash = '\0';
3047                         if (is_ip_address(if_name, AF_UNSPEC, &addr)) {
3048                                 match_type = MATCH_IFADDR;
3049                                 if (pchSlash != NULL
3050                                     && 1 == sscanf(pchSlash + 1, "%d",
3051                                             &prefixlen)) {
3052                                         addrbits = 8 *
3053                                             SIZEOF_INADDR(AF(&addr));
3054                                         prefixlen = max(-1, prefixlen);
3055                                         prefixlen = min(prefixlen,
3056                                                         addrbits);
3057                                 }
3058                         } else {
3059                                 match_type = MATCH_IFNAME;
3060                                 if (pchSlash != NULL)
3061                                         *pchSlash = '/';
3062                         }
3063                         break;
3064
3065                 case T_All:
3066                         match_type = MATCH_ALL;
3067                         break;
3068
3069                 case T_Ipv4:
3070                         match_type = MATCH_IPV4;
3071                         break;
3072
3073                 case T_Ipv6:
3074                         match_type = MATCH_IPV6;
3075                         break;
3076
3077                 case T_Wildcard:
3078                         match_type = MATCH_WILDCARD;
3079                         break;
3080                 }
3081
3082                 switch (curr_node->action) {
3083
3084                 default:
3085                         fatal_error("config_nic_rules: action-token=%d", curr_node->action);
3086
3087                 case T_Listen:
3088                         action = ACTION_LISTEN;
3089                         break;
3090
3091                 case T_Ignore:
3092                         action = ACTION_IGNORE;
3093                         break;
3094
3095                 case T_Drop:
3096                         action = ACTION_DROP;
3097                         break;
3098                 }
3099
3100                 add_nic_rule(match_type, if_name, prefixlen,
3101                              action);
3102                 timer_interfacetimeout(current_time + 2);
3103                 if (if_name != NULL)
3104                         free(if_name);
3105         }
3106 }
3107 #endif  /* !SIM */
3108
3109
3110 #ifdef FREE_CFG_T
3111 static void
3112 free_config_nic_rules(
3113         config_tree *ptree
3114         )
3115 {
3116         nic_rule_node *curr_node;
3117
3118         if (ptree->nic_rules != NULL) {
3119                 for (;;) {
3120                         UNLINK_FIFO(curr_node, *ptree->nic_rules, link);
3121                         if (NULL == curr_node)
3122                                 break;
3123                         free(curr_node->if_name);
3124                         free(curr_node);
3125                 }
3126                 free(ptree->nic_rules);
3127                 ptree->nic_rules = NULL;
3128         }
3129 }
3130 #endif  /* FREE_CFG_T */
3131
3132
3133 static void
3134 apply_enable_disable(
3135         attr_val_fifo * fifo,
3136         int             enable
3137         )
3138 {
3139         attr_val *curr_tok_fifo;
3140         int option;
3141 #ifdef BC_LIST_FRAMEWORK_NOT_YET_USED
3142         bc_entry *pentry;
3143 #endif
3144
3145         for (curr_tok_fifo = HEAD_PFIFO(fifo);
3146              curr_tok_fifo != NULL;
3147              curr_tok_fifo = curr_tok_fifo->link) {
3148
3149                 option = curr_tok_fifo->value.i;
3150                 switch (option) {
3151
3152                 default:
3153                         msyslog(LOG_ERR,
3154                                 "can not apply enable/disable token %d, unknown",
3155                                 option);
3156                         break;
3157
3158                 case T_Auth:
3159                         proto_config(PROTO_AUTHENTICATE, enable, 0., NULL);
3160                         break;
3161
3162                 case T_Bclient:
3163                         proto_config(PROTO_BROADCLIENT, enable, 0., NULL);
3164                         break;
3165
3166                 case T_Calibrate:
3167                         proto_config(PROTO_CAL, enable, 0., NULL);
3168                         break;
3169
3170                 case T_Kernel:
3171                         proto_config(PROTO_KERNEL, enable, 0., NULL);
3172                         break;
3173
3174                 case T_Monitor:
3175                         proto_config(PROTO_MONITOR, enable, 0., NULL);
3176                         break;
3177
3178                 case T_Mode7:
3179                         proto_config(PROTO_MODE7, enable, 0., NULL);
3180                         break;
3181
3182                 case T_Ntp:
3183                         proto_config(PROTO_NTP, enable, 0., NULL);
3184                         break;
3185
3186                 case T_PCEdigest:
3187                         proto_config(PROTO_PCEDIGEST, enable, 0., NULL);
3188                         break;
3189
3190                 case T_Stats:
3191                         proto_config(PROTO_FILEGEN, enable, 0., NULL);
3192                         break;
3193
3194                 case T_UEcrypto:
3195                         proto_config(PROTO_UECRYPTO, enable, 0., NULL);
3196                         break;
3197
3198                 case T_UEcryptonak:
3199                         proto_config(PROTO_UECRYPTONAK, enable, 0., NULL);
3200                         break;
3201
3202                 case T_UEdigest:
3203                         proto_config(PROTO_UEDIGEST, enable, 0., NULL);
3204                         break;
3205
3206 #ifdef BC_LIST_FRAMEWORK_NOT_YET_USED
3207                 case T_Bc_bugXXXX:
3208                         pentry = bc_list;
3209                         while (pentry->token) {
3210                                 if (pentry->token == option)
3211                                         break;
3212                                 pentry++;
3213                         }
3214                         if (!pentry->token) {
3215                                 msyslog(LOG_ERR,
3216                                         "compat token %d not in bc_list[]",
3217                                         option);
3218                                 continue;
3219                         }
3220                         pentry->enabled = enable;
3221                         break;
3222 #endif
3223                 }
3224         }
3225 }
3226
3227
3228 static void
3229 config_system_opts(
3230         config_tree *ptree
3231         )
3232 {
3233         apply_enable_disable(ptree->enable_opts, 1);
3234         apply_enable_disable(ptree->disable_opts, 0);
3235 }
3236
3237
3238 #ifdef FREE_CFG_T
3239 static void
3240 free_config_system_opts(
3241         config_tree *ptree
3242         )
3243 {
3244         FREE_ATTR_VAL_FIFO(ptree->enable_opts);
3245         FREE_ATTR_VAL_FIFO(ptree->disable_opts);
3246 }
3247 #endif  /* FREE_CFG_T */
3248
3249
3250 static void
3251 config_logconfig(
3252         config_tree *ptree
3253         )
3254 {
3255         attr_val *      my_lc;
3256
3257         my_lc = HEAD_PFIFO(ptree->logconfig);
3258         for (; my_lc != NULL; my_lc = my_lc->link) {
3259                 switch (my_lc->attr) {
3260
3261                 case '+':
3262                         ntp_syslogmask |= get_logmask(my_lc->value.s);
3263                         break;
3264
3265                 case '-':
3266                         ntp_syslogmask &= ~get_logmask(my_lc->value.s);
3267                         break;
3268
3269                 case '=':
3270                         ntp_syslogmask = get_logmask(my_lc->value.s);
3271                         break;
3272                 default:
3273                         fatal_error("config-logconfig: modifier='%c'", my_lc->attr);
3274                 }
3275         }
3276 }
3277
3278
3279 #ifdef FREE_CFG_T
3280 static void
3281 free_config_logconfig(
3282         config_tree *ptree
3283         )
3284 {
3285         FREE_ATTR_VAL_FIFO(ptree->logconfig);
3286 }
3287 #endif  /* FREE_CFG_T */
3288
3289
3290 #ifndef SIM
3291 static void
3292 config_phone(
3293         config_tree *ptree
3294         )
3295 {
3296         size_t          i;
3297         string_node *   sn;
3298
3299         i = 0;
3300         sn = HEAD_PFIFO(ptree->phone);
3301         for (; sn != NULL; sn = sn->link) {
3302                 /* need to leave array entry for NULL terminator */
3303                 if (i < COUNTOF(sys_phone) - 1) {
3304                         sys_phone[i++] = estrdup(sn->s);
3305                         sys_phone[i] = NULL;
3306                 } else {
3307                         msyslog(LOG_INFO,
3308                                 "phone: Number of phone entries exceeds %zu. Ignoring phone %s...",
3309                                 (COUNTOF(sys_phone) - 1), sn->s);
3310                 }
3311         }
3312 }
3313 #endif  /* !SIM */
3314
3315 static void
3316 config_mdnstries(
3317         config_tree *ptree
3318         )
3319 {
3320 #ifdef HAVE_DNSREGISTRATION
3321         extern int mdnstries;
3322         mdnstries = ptree->mdnstries;
3323 #endif  /* HAVE_DNSREGISTRATION */
3324 }
3325
3326 #ifdef FREE_CFG_T
3327 static void
3328 free_config_phone(
3329         config_tree *ptree
3330         )
3331 {
3332         FREE_STRING_FIFO(ptree->phone);
3333 }
3334 #endif  /* FREE_CFG_T */
3335
3336
3337 #ifndef SIM
3338 static void
3339 config_setvar(
3340         config_tree *ptree
3341         )
3342 {
3343         setvar_node *my_node;
3344         size_t  varlen, vallen, octets;
3345         char *  str;
3346
3347         str = NULL;
3348         my_node = HEAD_PFIFO(ptree->setvar);
3349         for (; my_node != NULL; my_node = my_node->link) {
3350                 varlen = strlen(my_node->var);
3351                 vallen = strlen(my_node->val);
3352                 octets = varlen + vallen + 1 + 1;
3353                 str = erealloc(str, octets);
3354                 snprintf(str, octets, "%s=%s", my_node->var,
3355                          my_node->val);
3356                 set_sys_var(str, octets, (my_node->isdefault)
3357                                                 ? DEF
3358                                                 : 0);
3359         }
3360         if (str != NULL)
3361                 free(str);
3362 }
3363 #endif  /* !SIM */
3364
3365
3366 #ifdef FREE_CFG_T
3367 static void
3368 free_config_setvar(
3369         config_tree *ptree
3370         )
3371 {
3372         FREE_SETVAR_FIFO(ptree->setvar);
3373 }
3374 #endif  /* FREE_CFG_T */
3375
3376
3377 #ifndef SIM
3378 static void
3379 config_ttl(
3380         config_tree *ptree
3381         )
3382 {
3383         size_t i = 0;
3384         int_node *curr_ttl;
3385
3386         curr_ttl = HEAD_PFIFO(ptree->ttl);
3387         for (; curr_ttl != NULL; curr_ttl = curr_ttl->link) {
3388                 if (i < COUNTOF(sys_ttl))
3389                         sys_ttl[i++] = (u_char)curr_ttl->i;
3390                 else
3391                         msyslog(LOG_INFO,
3392                                 "ttl: Number of TTL entries exceeds %zu. Ignoring TTL %d...",
3393                                 COUNTOF(sys_ttl), curr_ttl->i);
3394         }
3395         sys_ttlmax = (i) ? (i - 1) : 0;
3396 }
3397 #endif  /* !SIM */
3398
3399
3400 #ifdef FREE_CFG_T
3401 static void
3402 free_config_ttl(
3403         config_tree *ptree
3404         )
3405 {
3406         FREE_INT_FIFO(ptree->ttl);
3407 }
3408 #endif  /* FREE_CFG_T */
3409
3410
3411 #ifndef SIM
3412 static void
3413 config_trap(
3414         config_tree *ptree
3415         )
3416 {
3417         addr_opts_node *curr_trap;
3418         attr_val *curr_opt;
3419         sockaddr_u addr_sock;
3420         sockaddr_u peeraddr;
3421         struct interface *localaddr;
3422         struct addrinfo hints;
3423         char port_text[8];
3424         settrap_parms *pstp;
3425         u_short port;
3426         int err_flag;
3427         int rc;
3428
3429         /* silence warning about addr_sock potentially uninitialized */
3430         AF(&addr_sock) = AF_UNSPEC;
3431
3432         curr_trap = HEAD_PFIFO(ptree->trap);
3433         for (; curr_trap != NULL; curr_trap = curr_trap->link) {
3434                 err_flag = 0;
3435                 port = 0;
3436                 localaddr = NULL;
3437
3438                 curr_opt = HEAD_PFIFO(curr_trap->options);
3439                 for (; curr_opt != NULL; curr_opt = curr_opt->link) {
3440                         if (T_Port == curr_opt->attr) {
3441                                 if (curr_opt->value.i < 1
3442                                     || curr_opt->value.i > USHRT_MAX) {
3443                                         msyslog(LOG_ERR,
3444                                                 "invalid port number "
3445                                                 "%d, trap ignored",
3446                                                 curr_opt->value.i);
3447                                         err_flag = 1;
3448                                 }
3449                                 port = (u_short)curr_opt->value.i;
3450                         }
3451                         else if (T_Interface == curr_opt->attr) {
3452                                 /* Resolve the interface address */
3453                                 ZERO_SOCK(&addr_sock);
3454                                 if (getnetnum(curr_opt->value.s,
3455                                               &addr_sock, 1, t_UNK) != 1) {
3456                                         err_flag = 1;
3457                                         break;
3458                                 }
3459
3460                                 localaddr = findinterface(&addr_sock);
3461
3462                                 if (NULL == localaddr) {
3463                                         msyslog(LOG_ERR,
3464                                                 "can't find interface with address %s",
3465                                                 stoa(&addr_sock));
3466                                         err_flag = 1;
3467                                 }
3468                         }
3469                 }
3470
3471                 /* Now process the trap for the specified interface
3472                  * and port number
3473                  */
3474                 if (!err_flag) {
3475                         if (!port)
3476                                 port = TRAPPORT;
3477                         ZERO_SOCK(&peeraddr);
3478                         rc = getnetnum(curr_trap->addr->address,
3479                                        &peeraddr, 1, t_UNK);
3480                         if (1 != rc) {
3481 #ifndef WORKER
3482                                 msyslog(LOG_ERR,
3483                                         "trap: unable to use IP address %s.",
3484                                         curr_trap->addr->address);
3485 #else   /* WORKER follows */
3486                                 /*
3487                                  * save context and hand it off
3488                                  * for name resolution.
3489                                  */
3490                                 ZERO(hints);
3491                                 hints.ai_protocol = IPPROTO_UDP;
3492                                 hints.ai_socktype = SOCK_DGRAM;
3493                                 snprintf(port_text, sizeof(port_text),
3494                                          "%u", port);
3495                                 hints.ai_flags = Z_AI_NUMERICSERV;
3496                                 pstp = emalloc_zero(sizeof(*pstp));
3497                                 if (localaddr != NULL) {
3498                                         hints.ai_family = localaddr->family;
3499                                         pstp->ifaddr_nonnull = 1;
3500                                         memcpy(&pstp->ifaddr,
3501                                                &localaddr->sin,
3502                                                sizeof(pstp->ifaddr));
3503                                 }
3504                                 rc = getaddrinfo_sometime(
3505                                         curr_trap->addr->address,
3506                                         port_text, &hints,
3507                                         INITIAL_DNS_RETRY,
3508                                         &trap_name_resolved,
3509                                         pstp);
3510                                 if (!rc)
3511                                         msyslog(LOG_ERR,
3512                                                 "config_trap: getaddrinfo_sometime(%s,%s): %m",
3513                                                 curr_trap->addr->address,
3514                                                 port_text);
3515 #endif  /* WORKER */
3516                                 continue;
3517                         }
3518                         /* port is at same location for v4 and v6 */
3519                         SET_PORT(&peeraddr, port);
3520
3521                         if (NULL == localaddr)
3522                                 localaddr = ANY_INTERFACE_CHOOSE(&peeraddr);
3523                         else
3524                                 AF(&peeraddr) = AF(&addr_sock);
3525
3526                         if (!ctlsettrap(&peeraddr, localaddr, 0,
3527                                         NTP_VERSION))
3528                                 msyslog(LOG_ERR,
3529                                         "set trap %s -> %s failed.",
3530                                         latoa(localaddr),
3531                                         stoa(&peeraddr));
3532                 }
3533         }
3534 }
3535
3536
3537 /*
3538  * trap_name_resolved()
3539  *
3540  * Callback invoked when config_trap()'s DNS lookup completes.
3541  */
3542 # ifdef WORKER
3543 static void
3544 trap_name_resolved(
3545         int                     rescode,
3546         int                     gai_errno,
3547         void *                  context,
3548         const char *            name,
3549         const char *            service,
3550         const struct addrinfo * hints,
3551         const struct addrinfo * res
3552         )
3553 {
3554         settrap_parms *pstp;
3555         struct interface *localaddr;
3556         sockaddr_u peeraddr;
3557
3558         (void)gai_errno;
3559         (void)service;
3560         (void)hints;
3561         pstp = context;
3562         if (rescode) {
3563                 msyslog(LOG_ERR,
3564                         "giving up resolving trap host %s: %s (%d)",
3565                         name, gai_strerror(rescode), rescode);
3566                 free(pstp);
3567                 return;
3568         }
3569         INSIST(sizeof(peeraddr) >= res->ai_addrlen);
3570         ZERO(peeraddr);
3571         memcpy(&peeraddr, res->ai_addr, res->ai_addrlen);
3572         localaddr = NULL;
3573         if (pstp->ifaddr_nonnull)
3574                 localaddr = findinterface(&pstp->ifaddr);
3575         if (NULL == localaddr)
3576                 localaddr = ANY_INTERFACE_CHOOSE(&peeraddr);
3577         if (!ctlsettrap(&peeraddr, localaddr, 0, NTP_VERSION))
3578                 msyslog(LOG_ERR, "set trap %s -> %s failed.",
3579                         latoa(localaddr), stoa(&peeraddr));
3580         free(pstp);
3581 }
3582 # endif /* WORKER */
3583 #endif  /* !SIM */
3584
3585
3586 #ifdef FREE_CFG_T
3587 static void
3588 free_config_trap(
3589         config_tree *ptree
3590         )
3591 {
3592         FREE_ADDR_OPTS_FIFO(ptree->trap);
3593 }
3594 #endif  /* FREE_CFG_T */
3595
3596
3597 #ifndef SIM
3598 static void
3599 config_fudge(
3600         config_tree *ptree
3601         )
3602 {
3603         addr_opts_node *curr_fudge;
3604         attr_val *curr_opt;
3605         sockaddr_u addr_sock;
3606         address_node *addr_node;
3607         struct refclockstat clock_stat;
3608         int err_flag;
3609
3610         curr_fudge = HEAD_PFIFO(ptree->fudge);
3611         for (; curr_fudge != NULL; curr_fudge = curr_fudge->link) {
3612                 err_flag = 0;
3613
3614                 /* Get the reference clock address and
3615                  * ensure that it is sane
3616                  */
3617                 addr_node = curr_fudge->addr;
3618                 ZERO_SOCK(&addr_sock);
3619                 if (getnetnum(addr_node->address, &addr_sock, 1, t_REF)
3620                     != 1) {
3621                         err_flag = 1;
3622                         msyslog(LOG_ERR,
3623                                 "unrecognized fudge reference clock address %s, line ignored",
3624                                 stoa(&addr_sock));
3625                 }
3626
3627                 if (!ISREFCLOCKADR(&addr_sock)) {
3628                         err_flag = 1;
3629                         msyslog(LOG_ERR,
3630                                 "inappropriate address %s for the fudge command, line ignored",
3631                                 stoa(&addr_sock));
3632                 }
3633
3634                 /* Parse all the options to the fudge command */
3635                 ZERO(clock_stat);
3636                 curr_opt = HEAD_PFIFO(curr_fudge->options);
3637                 for (; curr_opt != NULL; curr_opt = curr_opt->link) {
3638                         switch (curr_opt->attr) {
3639
3640                         case T_Time1:
3641                                 clock_stat.haveflags |= CLK_HAVETIME1;
3642                                 clock_stat.fudgetime1 = curr_opt->value.d;
3643                                 break;
3644
3645                         case T_Time2:
3646                                 clock_stat.haveflags |= CLK_HAVETIME2;
3647                                 clock_stat.fudgetime2 = curr_opt->value.d;
3648                                 break;
3649
3650                         case T_Stratum:
3651                                 clock_stat.haveflags |= CLK_HAVEVAL1;
3652                                 clock_stat.fudgeval1 = curr_opt->value.i;
3653                                 break;
3654
3655                         case T_Refid:
3656                                 clock_stat.haveflags |= CLK_HAVEVAL2;
3657                                 clock_stat.fudgeval2 = 0;
3658                                 memcpy(&clock_stat.fudgeval2,
3659                                        curr_opt->value.s,
3660                                        min(strlen(curr_opt->value.s), 4));
3661                                 break;
3662
3663                         case T_Flag1:
3664                                 clock_stat.haveflags |= CLK_HAVEFLAG1;
3665                                 if (curr_opt->value.i)
3666                                         clock_stat.flags |= CLK_FLAG1;
3667                                 else
3668                                         clock_stat.flags &= ~CLK_FLAG1;
3669                                 break;
3670
3671                         case T_Flag2:
3672                                 clock_stat.haveflags |= CLK_HAVEFLAG2;
3673                                 if (curr_opt->value.i)
3674                                         clock_stat.flags |= CLK_FLAG2;
3675                                 else
3676                                         clock_stat.flags &= ~CLK_FLAG2;
3677                                 break;
3678
3679                         case T_Flag3:
3680                                 clock_stat.haveflags |= CLK_HAVEFLAG3;
3681                                 if (curr_opt->value.i)
3682                                         clock_stat.flags |= CLK_FLAG3;
3683                                 else
3684                                         clock_stat.flags &= ~CLK_FLAG3;
3685                                 break;
3686
3687                         case T_Flag4:
3688                                 clock_stat.haveflags |= CLK_HAVEFLAG4;
3689                                 if (curr_opt->value.i)
3690                                         clock_stat.flags |= CLK_FLAG4;
3691                                 else
3692                                         clock_stat.flags &= ~CLK_FLAG4;
3693                                 break;
3694
3695                         default:
3696                                 msyslog(LOG_ERR,
3697                                         "Unexpected fudge flag %s (%d) for %s",
3698                                         token_name(curr_opt->attr),
3699                                         curr_opt->attr, stoa(&addr_sock));
3700                                 exit(curr_opt->attr ? curr_opt->attr : 1);
3701                         }
3702                 }
3703 # ifdef REFCLOCK
3704                 if (!err_flag)
3705                         refclock_control(&addr_sock, &clock_stat, NULL);
3706 # endif
3707         }
3708 }
3709 #endif  /* !SIM */
3710
3711
3712 #ifdef FREE_CFG_T
3713 static void
3714 free_config_fudge(
3715         config_tree *ptree
3716         )
3717 {
3718         FREE_ADDR_OPTS_FIFO(ptree->fudge);
3719 }
3720 #endif  /* FREE_CFG_T */
3721
3722
3723 static void
3724 config_vars(
3725         config_tree *ptree
3726         )
3727 {
3728         attr_val *curr_var;
3729         int len;
3730
3731         curr_var = HEAD_PFIFO(ptree->vars);
3732         for (; curr_var != NULL; curr_var = curr_var->link) {
3733                 /* Determine which variable to set and set it */
3734                 switch (curr_var->attr) {
3735
3736                 case T_Broadcastdelay:
3737                         proto_config(PROTO_BROADDELAY, 0, curr_var->value.d, NULL);
3738                         break;
3739
3740                 case T_Tick:
3741                         loop_config(LOOP_TICK, curr_var->value.d);
3742                         break;
3743
3744                 case T_Driftfile:
3745                         if ('\0' == curr_var->value.s[0]) {
3746                                 stats_drift_file = 0;
3747                                 msyslog(LOG_INFO, "config: driftfile disabled");
3748                         } else
3749                                 stats_config(STATS_FREQ_FILE, curr_var->value.s);
3750                         break;
3751
3752                 case T_Dscp:
3753                         /* DSCP is in the upper 6 bits of the IP TOS/DS field */
3754                         qos = curr_var->value.i << 2;
3755                         break;
3756
3757                 case T_Ident:
3758                         sys_ident = curr_var->value.s;
3759                         break;
3760
3761                 case T_WanderThreshold:         /* FALLTHROUGH */
3762                 case T_Nonvolatile:
3763                         wander_threshold = curr_var->value.d;
3764                         break;
3765
3766                 case T_Leapfile:
3767                         stats_config(STATS_LEAP_FILE, curr_var->value.s);
3768                         break;
3769
3770 #ifdef LEAP_SMEAR
3771                 case T_Leapsmearinterval:
3772                         leap_smear_intv = curr_var->value.i;
3773                         msyslog(LOG_INFO, "config: leap smear interval %i s", leap_smear_intv);
3774                         break;
3775 #endif
3776
3777                 case T_Pidfile:
3778                         stats_config(STATS_PID_FILE, curr_var->value.s);
3779                         break;
3780
3781                 case T_Logfile:
3782                         if (-1 == change_logfile(curr_var->value.s, TRUE))
3783                                 msyslog(LOG_ERR,
3784                                         "Cannot open logfile %s: %m",
3785                                         curr_var->value.s);
3786                         break;
3787
3788                 case T_Saveconfigdir:
3789                         if (saveconfigdir != NULL)
3790                                 free(saveconfigdir);
3791                         len = strlen(curr_var->value.s);
3792                         if (0 == len) {
3793                                 saveconfigdir = NULL;
3794                         } else if (DIR_SEP != curr_var->value.s[len - 1]
3795 #ifdef SYS_WINNT        /* slash is also a dir. sep. on Windows */
3796                                    && '/' != curr_var->value.s[len - 1]
3797 #endif
3798                                  ) {
3799                                         len++;
3800                                         saveconfigdir = emalloc(len + 1);
3801                                         snprintf(saveconfigdir, len + 1,
3802                                                  "%s%c",
3803                                                  curr_var->value.s,
3804                                                  DIR_SEP);
3805                         } else {
3806                                         saveconfigdir = estrdup(
3807                                             curr_var->value.s);
3808                         }
3809                         break;
3810
3811                 case T_Automax:
3812 #ifdef AUTOKEY
3813                         sys_automax = curr_var->value.i;
3814 #endif
3815                         break;
3816
3817                 default:
3818                         msyslog(LOG_ERR,
3819                                 "config_vars(): unexpected token %d",
3820                                 curr_var->attr);
3821                 }
3822         }
3823 }
3824
3825
3826 #ifdef FREE_CFG_T
3827 static void
3828 free_config_vars(
3829         config_tree *ptree
3830         )
3831 {
3832         FREE_ATTR_VAL_FIFO(ptree->vars);
3833 }
3834 #endif  /* FREE_CFG_T */
3835
3836
3837 /* Define a function to check if a resolved address is sane.
3838  * If yes, return 1, else return 0;
3839  */
3840 static int
3841 is_sane_resolved_address(
3842         sockaddr_u *    peeraddr,
3843         int             hmode
3844         )
3845 {
3846         if (!ISREFCLOCKADR(peeraddr) && ISBADADR(peeraddr)) {
3847                 msyslog(LOG_ERR,
3848                         "attempt to configure invalid address %s",
3849                         stoa(peeraddr));
3850                 return 0;
3851         }
3852         /*
3853          * Shouldn't be able to specify multicast
3854          * address for server/peer!
3855          * and unicast address for manycastclient!
3856          */
3857         if ((T_Server == hmode || T_Peer == hmode || T_Pool == hmode)
3858             && IS_MCAST(peeraddr)) {
3859                 msyslog(LOG_ERR,
3860                         "attempt to configure invalid address %s",
3861                         stoa(peeraddr));
3862                 return 0;
3863         }
3864         if (T_Manycastclient == hmode && !IS_MCAST(peeraddr)) {
3865                 msyslog(LOG_ERR,
3866                         "attempt to configure invalid address %s",
3867                         stoa(peeraddr));
3868                 return 0;
3869         }
3870
3871         if (IS_IPV6(peeraddr) && !ipv6_works)
3872                 return 0;
3873
3874         /* Ok, all tests succeeded, now we can return 1 */
3875         return 1;
3876 }
3877
3878
3879 #ifndef SIM
3880 static u_char
3881 get_correct_host_mode(
3882         int token
3883         )
3884 {
3885         switch (token) {
3886
3887         case T_Server:
3888         case T_Pool:
3889         case T_Manycastclient:
3890                 return MODE_CLIENT;
3891
3892         case T_Peer:
3893                 return MODE_ACTIVE;
3894
3895         case T_Broadcast:
3896                 return MODE_BROADCAST;
3897
3898         default:
3899                 return 0;
3900         }
3901 }
3902
3903
3904 /*
3905  * peerflag_bits()      get config_peers() peerflags value from a
3906  *                      peer_node's queue of flag attr_val entries.
3907  */
3908 static int
3909 peerflag_bits(
3910         peer_node *pn
3911         )
3912 {
3913         int peerflags;
3914         attr_val *option;
3915
3916         /* translate peerflags options to bits */
3917         peerflags = 0;
3918         option = HEAD_PFIFO(pn->peerflags);
3919         for (; option != NULL; option = option->link) {
3920                 switch (option->value.i) {
3921
3922                 default:
3923                         fatal_error("peerflag_bits: option-token=%d", option->value.i);
3924
3925                 case T_Autokey:
3926                         peerflags |= FLAG_SKEY;
3927                         break;
3928
3929                 case T_Burst:
3930                         peerflags |= FLAG_BURST;
3931                         break;
3932
3933                 case T_Iburst:
3934                         peerflags |= FLAG_IBURST;
3935                         break;
3936
3937                 case T_Noselect:
3938                         peerflags |= FLAG_NOSELECT;
3939                         break;
3940
3941                 case T_Preempt:
3942                         peerflags |= FLAG_PREEMPT;
3943                         break;
3944
3945                 case T_Prefer:
3946                         peerflags |= FLAG_PREFER;
3947                         break;
3948
3949                 case T_True:
3950                         peerflags |= FLAG_TRUE;
3951                         break;
3952
3953                 case T_Xleave:
3954                         peerflags |= FLAG_XLEAVE;
3955                         break;
3956                 }
3957         }
3958
3959         return peerflags;
3960 }
3961
3962
3963 static void
3964 config_peers(
3965         config_tree *ptree
3966         )
3967 {
3968         sockaddr_u              peeraddr;
3969         struct addrinfo         hints;
3970         peer_node *             curr_peer;
3971         peer_resolved_ctx *     ctx;
3972         u_char                  hmode;
3973
3974         /* add servers named on the command line with iburst implied */
3975         for (;
3976              cmdline_server_count > 0;
3977              cmdline_server_count--, cmdline_servers++) {
3978
3979                 ZERO_SOCK(&peeraddr);
3980                 /*
3981                  * If we have a numeric address, we can safely
3982                  * proceed in the mainline with it.  Otherwise, hand
3983                  * the hostname off to the blocking child.
3984                  *
3985                  * Note that if we're told to add the peer here, we
3986                  * do that regardless of ippeerlimit.
3987                  */
3988                 if (is_ip_address(*cmdline_servers, AF_UNSPEC,
3989                                   &peeraddr)) {
3990
3991                         SET_PORT(&peeraddr, NTP_PORT);
3992                         if (is_sane_resolved_address(&peeraddr,
3993                                                      T_Server))
3994                                 peer_config(
3995                                         &peeraddr,
3996                                         NULL,
3997                                         NULL,
3998                                         -1,
3999                                         MODE_CLIENT,
4000                                         NTP_VERSION,
4001                                         0,
4002                                         0,
4003                                         FLAG_IBURST,
4004                                         0,
4005                                         0,
4006                                         NULL);
4007                 } else {
4008                         /* we have a hostname to resolve */
4009 # ifdef WORKER
4010                         ctx = emalloc_zero(sizeof(*ctx));
4011                         ctx->family = AF_UNSPEC;
4012                         ctx->host_mode = T_Server;
4013                         ctx->hmode = MODE_CLIENT;
4014                         ctx->version = NTP_VERSION;
4015                         ctx->flags = FLAG_IBURST;
4016
4017                         ZERO(hints);
4018                         hints.ai_family = (u_short)ctx->family;
4019                         hints.ai_socktype = SOCK_DGRAM;
4020                         hints.ai_protocol = IPPROTO_UDP;
4021
4022                         getaddrinfo_sometime_ex(*cmdline_servers,
4023                                              "ntp", &hints,
4024                                              INITIAL_DNS_RETRY,
4025                                              &peer_name_resolved,
4026                                              (void *)ctx, DNSFLAGS);
4027 # else  /* !WORKER follows */
4028                         msyslog(LOG_ERR,
4029                                 "hostname %s can not be used, please use IP address instead.",
4030                                 curr_peer->addr->address);
4031 # endif
4032                 }
4033         }
4034
4035         /* add associations from the configuration file */
4036         curr_peer = HEAD_PFIFO(ptree->peers);
4037         for (; curr_peer != NULL; curr_peer = curr_peer->link) {
4038                 ZERO_SOCK(&peeraddr);
4039                 /* Find the correct host-mode */
4040                 hmode = get_correct_host_mode(curr_peer->host_mode);
4041                 INSIST(hmode != 0);
4042
4043                 if (T_Pool == curr_peer->host_mode) {
4044                         AF(&peeraddr) = curr_peer->addr->type;
4045                         peer_config(
4046                                 &peeraddr,
4047                                 curr_peer->addr->address,
4048                                 NULL,
4049                                 -1,
4050                                 hmode,
4051                                 curr_peer->peerversion,
4052                                 curr_peer->minpoll,
4053                                 curr_peer->maxpoll,
4054                                 peerflag_bits(curr_peer),
4055                                 curr_peer->ttl,
4056                                 curr_peer->peerkey,
4057                                 curr_peer->group);
4058                 /*
4059                  * If we have a numeric address, we can safely
4060                  * proceed in the mainline with it.  Otherwise, hand
4061                  * the hostname off to the blocking child.
4062                  */
4063                 } else if (is_ip_address(curr_peer->addr->address,
4064                                   curr_peer->addr->type, &peeraddr)) {
4065
4066                         SET_PORT(&peeraddr, NTP_PORT);
4067                         if (is_sane_resolved_address(&peeraddr,
4068                             curr_peer->host_mode))
4069                                 peer_config(
4070                                         &peeraddr,
4071                                         NULL,
4072                                         NULL,
4073                                         -1,
4074                                         hmode,
4075                                         curr_peer->peerversion,
4076                                         curr_peer->minpoll,
4077                                         curr_peer->maxpoll,
4078                                         peerflag_bits(curr_peer),
4079                                         curr_peer->ttl,
4080                                         curr_peer->peerkey,
4081                                         curr_peer->group);
4082                 } else {
4083                         /* we have a hostname to resolve */
4084 # ifdef WORKER
4085                         ctx = emalloc_zero(sizeof(*ctx));
4086                         ctx->family = curr_peer->addr->type;
4087                         ctx->host_mode = curr_peer->host_mode;
4088                         ctx->hmode = hmode;
4089                         ctx->version = curr_peer->peerversion;
4090                         ctx->minpoll = curr_peer->minpoll;
4091                         ctx->maxpoll = curr_peer->maxpoll;
4092                         ctx->flags = peerflag_bits(curr_peer);
4093                         ctx->ttl = curr_peer->ttl;
4094                         ctx->keyid = curr_peer->peerkey;
4095                         ctx->group = curr_peer->group;
4096
4097                         ZERO(hints);
4098                         hints.ai_family = ctx->family;
4099                         hints.ai_socktype = SOCK_DGRAM;
4100                         hints.ai_protocol = IPPROTO_UDP;
4101
4102                         getaddrinfo_sometime_ex(curr_peer->addr->address,
4103                                              "ntp", &hints,
4104                                              INITIAL_DNS_RETRY,
4105                                              &peer_name_resolved, ctx,
4106                                              DNSFLAGS);
4107 # else  /* !WORKER follows */
4108                         msyslog(LOG_ERR,
4109                                 "hostname %s can not be used, please use IP address instead.",
4110                                 curr_peer->addr->address);
4111 # endif
4112                 }
4113         }
4114 }
4115 #endif  /* !SIM */
4116
4117 /*
4118  * peer_name_resolved()
4119  *
4120  * Callback invoked when config_peers()'s DNS lookup completes.
4121  */
4122 #ifdef WORKER
4123 static void
4124 peer_name_resolved(
4125         int                     rescode,
4126         int                     gai_errno,
4127         void *                  context,
4128         const char *            name,
4129         const char *            service,
4130         const struct addrinfo * hints,
4131         const struct addrinfo * res
4132         )
4133 {
4134         sockaddr_u              peeraddr;
4135         peer_resolved_ctx *     ctx;
4136         u_short                 af;
4137         const char *            fam_spec;
4138
4139         (void)gai_errno;
4140         (void)service;
4141         (void)hints;
4142         ctx = context;
4143
4144         DPRINTF(1, ("peer_name_resolved(%s) rescode %d\n", name, rescode));
4145
4146         if (rescode) {
4147                 free(ctx);
4148                 msyslog(LOG_ERR,
4149                         "giving up resolving host %s: %s (%d)",
4150                         name, gai_strerror(rescode), rescode);
4151                 return;
4152         }
4153
4154         /* Loop to configure a single association */
4155         for (; res != NULL; res = res->ai_next) {
4156                 memcpy(&peeraddr, res->ai_addr, res->ai_addrlen);
4157                 if (is_sane_resolved_address(&peeraddr,
4158                                              ctx->host_mode)) {
4159                         NLOG(NLOG_SYSINFO) {
4160                                 af = ctx->family;
4161                                 fam_spec = (AF_INET6 == af)
4162                                                ? "(AAAA) "
4163                                                : (AF_INET == af)
4164                                                      ? "(A) "
4165                                                      : "";
4166                                 msyslog(LOG_INFO, "DNS %s %s-> %s",
4167                                         name, fam_spec,
4168                                         stoa(&peeraddr));
4169                         }
4170                         peer_config(
4171                                 &peeraddr,
4172                                 NULL,
4173                                 NULL,
4174                                 -1,
4175                                 ctx->hmode,
4176                                 ctx->version,
4177                                 ctx->minpoll,
4178                                 ctx->maxpoll,
4179                                 ctx->flags,
4180                                 ctx->ttl,
4181                                 ctx->keyid,
4182                                 ctx->group);
4183                         break;
4184                 }
4185         }
4186         free(ctx);
4187 }
4188 #endif  /* WORKER */
4189
4190
4191 #ifdef FREE_CFG_T
4192 static void
4193 free_config_peers(
4194         config_tree *ptree
4195         )
4196 {
4197         peer_node *curr_peer;
4198
4199         if (ptree->peers != NULL) {
4200                 for (;;) {
4201                         UNLINK_FIFO(curr_peer, *ptree->peers, link);
4202                         if (NULL == curr_peer)
4203                                 break;
4204                         destroy_address_node(curr_peer->addr);
4205                         destroy_attr_val_fifo(curr_peer->peerflags);
4206                         free(curr_peer);
4207                 }
4208                 free(ptree->peers);
4209                 ptree->peers = NULL;
4210         }
4211 }
4212 #endif  /* FREE_CFG_T */
4213
4214
4215 #ifndef SIM
4216 static void
4217 config_unpeers(
4218         config_tree *ptree
4219         )
4220 {
4221         sockaddr_u              peeraddr;
4222         struct addrinfo         hints;
4223         unpeer_node *           curr_unpeer;
4224         struct peer *           p;
4225         const char *            name;
4226         int                     rc;
4227
4228         curr_unpeer = HEAD_PFIFO(ptree->unpeers);
4229         for (; curr_unpeer != NULL; curr_unpeer = curr_unpeer->link) {
4230                 /*
4231                  * If we have no address attached, assume we have to
4232                  * unpeer by AssocID.
4233                  */
4234                 if (!curr_unpeer->addr) {
4235                         p = findpeerbyassoc(curr_unpeer->assocID);
4236                         if (p != NULL) {
4237                                 msyslog(LOG_NOTICE, "unpeered %s",
4238                                         stoa(&p->srcadr));
4239                                 peer_clear(p, "GONE");
4240                                 unpeer(p);
4241                         }
4242                         continue;
4243                 }
4244
4245                 ZERO(peeraddr);
4246                 AF(&peeraddr) = curr_unpeer->addr->type;
4247                 name = curr_unpeer->addr->address;
4248                 rc = getnetnum(name, &peeraddr, 0, t_UNK);
4249                 /* Do we have a numeric address? */
4250                 if (rc > 0) {
4251                         DPRINTF(1, ("unpeer: searching for %s\n",
4252                                     stoa(&peeraddr)));
4253                         p = findexistingpeer(&peeraddr, NULL, NULL, -1, 0, NULL);
4254                         if (p != NULL) {
4255                                 msyslog(LOG_NOTICE, "unpeered %s",
4256                                         stoa(&peeraddr));
4257                                 peer_clear(p, "GONE");
4258                                 unpeer(p);
4259                         }
4260                         continue;
4261                 }
4262                 /*
4263                  * It's not a numeric IP address, it's a hostname.
4264                  * Check for associations with a matching hostname.
4265                  */
4266                 for (p = peer_list; p != NULL; p = p->p_link)
4267                         if (p->hostname != NULL)
4268                                 if (!strcasecmp(p->hostname, name))
4269                                         break;
4270                 if (p != NULL) {
4271                         msyslog(LOG_NOTICE, "unpeered %s", name);
4272                         peer_clear(p, "GONE");
4273                         unpeer(p);
4274                 }
4275                 /* Resolve the hostname to address(es). */
4276 # ifdef WORKER
4277                 ZERO(hints);
4278                 hints.ai_family = curr_unpeer->addr->type;
4279                 hints.ai_socktype = SOCK_DGRAM;
4280                 hints.ai_protocol = IPPROTO_UDP;
4281                 getaddrinfo_sometime(name, "ntp", &hints,
4282                                      INITIAL_DNS_RETRY,
4283                                      &unpeer_name_resolved, NULL);
4284 # else  /* !WORKER follows */
4285                 msyslog(LOG_ERR,
4286                         "hostname %s can not be used, please use IP address instead.",
4287                         name);
4288 # endif
4289         }
4290 }
4291 #endif  /* !SIM */
4292
4293
4294 /*
4295  * unpeer_name_resolved()
4296  *
4297  * Callback invoked when config_unpeers()'s DNS lookup completes.
4298  */
4299 #ifdef WORKER
4300 static void
4301 unpeer_name_resolved(
4302         int                     rescode,
4303         int                     gai_errno,
4304         void *                  context,
4305         const char *            name,
4306         const char *            service,
4307         const struct addrinfo * hints,
4308         const struct addrinfo * res
4309         )
4310 {
4311         sockaddr_u      peeraddr;
4312         struct peer *   peer;
4313         u_short         af;
4314         const char *    fam_spec;
4315
4316         (void)context;
4317         (void)hints;
4318         DPRINTF(1, ("unpeer_name_resolved(%s) rescode %d\n", name, rescode));
4319
4320         if (rescode) {
4321                 msyslog(LOG_ERR, "giving up resolving unpeer %s: %s (%d)",
4322                         name, gai_strerror(rescode), rescode);
4323                 return;
4324         }
4325         /*
4326          * Loop through the addresses found
4327          */
4328         for (; res != NULL; res = res->ai_next) {
4329                 INSIST(res->ai_addrlen <= sizeof(peeraddr));
4330                 memcpy(&peeraddr, res->ai_addr, res->ai_addrlen);
4331                 DPRINTF(1, ("unpeer: searching for peer %s\n",
4332                             stoa(&peeraddr)));
4333                 peer = findexistingpeer(&peeraddr, NULL, NULL, -1, 0, NULL);
4334                 if (peer != NULL) {
4335                         af = AF(&peeraddr);
4336                         fam_spec = (AF_INET6 == af)
4337                                        ? "(AAAA) "
4338                                        : (AF_INET == af)
4339                                              ? "(A) "
4340                                              : "";
4341                         msyslog(LOG_NOTICE, "unpeered %s %s-> %s", name,
4342                                 fam_spec, stoa(&peeraddr));
4343                         peer_clear(peer, "GONE");
4344                         unpeer(peer);
4345                 }
4346         }
4347 }
4348 #endif  /* WORKER */
4349
4350
4351 #ifdef FREE_CFG_T
4352 static void
4353 free_config_unpeers(
4354         config_tree *ptree
4355         )
4356 {
4357         unpeer_node *curr_unpeer;
4358
4359         if (ptree->unpeers != NULL) {
4360                 for (;;) {
4361                         UNLINK_FIFO(curr_unpeer, *ptree->unpeers, link);
4362                         if (NULL == curr_unpeer)
4363                                 break;
4364                         destroy_address_node(curr_unpeer->addr);
4365                         free(curr_unpeer);
4366                 }
4367                 free(ptree->unpeers);
4368         }
4369 }
4370 #endif  /* FREE_CFG_T */
4371
4372
4373 #ifndef SIM
4374 static void
4375 config_reset_counters(
4376         config_tree *ptree
4377         )
4378 {
4379         int_node *counter_set;
4380
4381         for (counter_set = HEAD_PFIFO(ptree->reset_counters);
4382              counter_set != NULL;
4383              counter_set = counter_set->link) {
4384                 switch (counter_set->i) {
4385                 default:
4386                         DPRINTF(1, ("config_reset_counters %s (%d) invalid\n",
4387                                     keyword(counter_set->i), counter_set->i));
4388                         break;
4389
4390                 case T_Allpeers:
4391                         peer_all_reset();
4392                         break;
4393
4394                 case T_Auth:
4395                         reset_auth_stats();
4396                         break;
4397
4398                 case T_Ctl:
4399                         ctl_clr_stats();
4400                         break;
4401
4402                 case T_Io:
4403                         io_clr_stats();
4404                         break;
4405
4406                 case T_Mem:
4407                         peer_clr_stats();
4408                         break;
4409
4410                 case T_Sys:
4411                         proto_clr_stats();
4412                         break;
4413
4414                 case T_Timer:
4415                         timer_clr_stats();
4416                         break;
4417                 }
4418         }
4419 }
4420 #endif  /* !SIM */
4421
4422
4423 #ifdef FREE_CFG_T
4424 static void
4425 free_config_reset_counters(
4426         config_tree *ptree
4427         )
4428 {
4429         FREE_INT_FIFO(ptree->reset_counters);
4430 }
4431 #endif  /* FREE_CFG_T */
4432
4433
4434 #ifdef SIM
4435 static void
4436 config_sim(
4437         config_tree *ptree
4438         )
4439 {
4440         int i;
4441         server_info *serv_info;
4442         attr_val *init_stmt;
4443         sim_node *sim_n;
4444
4445         /* Check if a simulate block was found in the configuration code.
4446          * If not, return an error and exit
4447          */
4448         sim_n = HEAD_PFIFO(ptree->sim_details);
4449         if (NULL == sim_n) {
4450                 fprintf(stderr, "ERROR!! I couldn't find a \"simulate\" block for configuring the simulator.\n");
4451                 fprintf(stderr, "\tCheck your configuration file.\n");
4452                 exit(1);
4453         }
4454
4455         /* Process the initialization statements
4456          * -------------------------------------
4457          */
4458         init_stmt = HEAD_PFIFO(sim_n->init_opts);
4459         for (; init_stmt != NULL; init_stmt = init_stmt->link) {
4460                 switch(init_stmt->attr) {
4461
4462                 case T_Beep_Delay:
4463                         simulation.beep_delay = init_stmt->value.d;
4464                         break;
4465
4466                 case T_Sim_Duration:
4467                         simulation.end_time = init_stmt->value.d;
4468                         break;
4469
4470                 default:
4471                         fprintf(stderr,
4472                                 "Unknown simulator init token %d\n",
4473                                 init_stmt->attr);
4474                         exit(1);
4475                 }
4476         }
4477
4478         /* Process the server list
4479          * -----------------------
4480          */
4481         simulation.num_of_servers = 0;
4482         serv_info = HEAD_PFIFO(sim_n->servers);
4483         for (; serv_info != NULL; serv_info = serv_info->link)
4484                 simulation.num_of_servers++;
4485         simulation.servers = eallocarray(simulation.num_of_servers,
4486                                      sizeof(simulation.servers[0]));
4487
4488         i = 0;
4489         serv_info = HEAD_PFIFO(sim_n->servers);
4490         for (; serv_info != NULL; serv_info = serv_info->link) {
4491                 if (NULL == serv_info) {
4492                         fprintf(stderr, "Simulator server list is corrupt\n");
4493                         exit(1);
4494                 } else {
4495                         simulation.servers[i] = *serv_info;
4496                         simulation.servers[i].link = NULL;
4497                         i++;
4498                 }
4499         }
4500
4501         printf("Creating server associations\n");
4502         create_server_associations();
4503         fprintf(stderr,"\tServer associations successfully created!!\n");
4504 }
4505
4506
4507 #ifdef FREE_CFG_T
4508 static void
4509 free_config_sim(
4510         config_tree *ptree
4511         )
4512 {
4513         sim_node *sim_n;
4514         server_info *serv_n;
4515         script_info *script_n;
4516
4517         if (NULL == ptree->sim_details)
4518                 return;
4519         sim_n = HEAD_PFIFO(ptree->sim_details);
4520         free(ptree->sim_details);
4521         ptree->sim_details = NULL;
4522         if (NULL == sim_n)
4523                 return;
4524
4525         FREE_ATTR_VAL_FIFO(sim_n->init_opts);
4526         for (;;) {
4527                 UNLINK_FIFO(serv_n, *sim_n->servers, link);
4528                 if (NULL == serv_n)
4529                         break;
4530                 free(serv_n->curr_script);
4531                 if (serv_n->script != NULL) {
4532                         for (;;) {
4533                                 UNLINK_FIFO(script_n, *serv_n->script,
4534                                             link);
4535                                 if (script_n == NULL)
4536                                         break;
4537                                 free(script_n);
4538                         }
4539                         free(serv_n->script);
4540                 }
4541                 free(serv_n);
4542         }
4543         free(sim_n);
4544 }
4545 #endif  /* FREE_CFG_T */
4546 #endif  /* SIM */
4547
4548
4549 /* Define two different config functions. One for the daemon and the other for
4550  * the simulator. The simulator ignores a lot of the standard ntpd configuration
4551  * options
4552  */
4553 #ifndef SIM
4554 static void
4555 config_ntpd(
4556         config_tree *ptree,
4557         int/*BOOL*/ input_from_files
4558         )
4559 {
4560         /* [Bug 3435] check and esure clock sanity if configured from
4561          * file and clock sanity parameters (-> basedate) are given. Do
4562          * this ASAP, so we don't disturb the closed loop controller.
4563          */
4564         if (input_from_files) {
4565                 if (config_tos_clock(ptree))
4566                         clamp_systime();
4567         }
4568
4569         config_nic_rules(ptree, input_from_files);
4570         config_monitor(ptree);
4571         config_auth(ptree);
4572         config_tos(ptree);
4573         config_access(ptree);
4574         config_tinker(ptree);
4575         config_rlimit(ptree);
4576         config_system_opts(ptree);
4577         config_logconfig(ptree);
4578         config_phone(ptree);
4579         config_mdnstries(ptree);
4580         config_setvar(ptree);
4581         config_ttl(ptree);
4582         config_vars(ptree);
4583
4584         io_open_sockets();      /* [bug 2837] dep. on config_vars() */
4585
4586         config_trap(ptree);     /* [bug 2923] dep. on io_open_sockets() */
4587         config_other_modes(ptree);
4588         config_peers(ptree);
4589         config_unpeers(ptree);
4590         config_fudge(ptree);
4591         config_reset_counters(ptree);
4592
4593 #ifdef DEBUG
4594         if (debug > 1) {
4595                 dump_restricts();
4596         }
4597 #endif
4598
4599 #ifdef TEST_BLOCKING_WORKER
4600         {
4601                 struct addrinfo hints;
4602
4603                 ZERO(hints);
4604                 hints.ai_socktype = SOCK_STREAM;
4605                 hints.ai_protocol = IPPROTO_TCP;
4606                 getaddrinfo_sometime("www.cnn.com", "ntp", &hints,
4607                                      INITIAL_DNS_RETRY,
4608                                      gai_test_callback, (void *)1);
4609                 hints.ai_family = AF_INET6;
4610                 getaddrinfo_sometime("ipv6.google.com", "ntp", &hints,
4611                                      INITIAL_DNS_RETRY,
4612                                      gai_test_callback, (void *)0x600);
4613         }
4614 #endif
4615 }
4616 #endif  /* !SIM */
4617
4618
4619 #ifdef SIM
4620 static void
4621 config_ntpdsim(
4622         config_tree *ptree
4623         )
4624 {
4625         printf("Configuring Simulator...\n");
4626         printf("Some ntpd-specific commands in the configuration file will be ignored.\n");
4627
4628         config_tos(ptree);
4629         config_monitor(ptree);
4630         config_tinker(ptree);
4631         if (0)
4632                 config_rlimit(ptree);   /* not needed for the simulator */
4633         config_system_opts(ptree);
4634         config_logconfig(ptree);
4635         config_vars(ptree);
4636         config_sim(ptree);
4637 }
4638 #endif /* SIM */
4639
4640
4641 /*
4642  * config_remotely() - implements ntpd side of ntpq :config
4643  */
4644 void
4645 config_remotely(
4646         sockaddr_u *    remote_addr
4647         )
4648 {
4649         char origin[128];
4650
4651         snprintf(origin, sizeof(origin), "remote config from %s",
4652                  stoa(remote_addr));
4653         lex_init_stack(origin, NULL); /* no checking needed... */
4654         init_syntax_tree(&cfgt);
4655         yyparse();
4656         lex_drop_stack();
4657
4658         cfgt.source.attr = CONF_SOURCE_NTPQ;
4659         cfgt.timestamp = time(NULL);
4660         cfgt.source.value.s = estrdup(stoa(remote_addr));
4661
4662         DPRINTF(1, ("Finished Parsing!!\n"));
4663
4664         save_and_apply_config_tree(FALSE);
4665 }
4666
4667
4668 /*
4669  * getconfig() - process startup configuration file e.g /etc/ntp.conf
4670  */
4671 void
4672 getconfig(
4673         int     argc,
4674         char ** argv
4675         )
4676 {
4677         char    line[256];
4678
4679 #ifdef DEBUG
4680         atexit(free_all_config_trees);
4681 #endif
4682 #ifndef SYS_WINNT
4683         config_file = CONFIG_FILE;
4684 #else
4685         temp = CONFIG_FILE;
4686         if (!ExpandEnvironmentStringsA(temp, config_file_storage,
4687                                        sizeof(config_file_storage))) {
4688                 msyslog(LOG_ERR, "ExpandEnvironmentStrings CONFIG_FILE failed: %m");
4689                 exit(1);
4690         }
4691         config_file = config_file_storage;
4692
4693         temp = ALT_CONFIG_FILE;
4694         if (!ExpandEnvironmentStringsA(temp, alt_config_file_storage,
4695                                        sizeof(alt_config_file_storage))) {
4696                 msyslog(LOG_ERR, "ExpandEnvironmentStrings ALT_CONFIG_FILE failed: %m");
4697                 exit(1);
4698         }
4699         alt_config_file = alt_config_file_storage;
4700 #endif /* SYS_WINNT */
4701
4702         /*
4703          * install a non default variable with this daemon version
4704          */
4705         snprintf(line, sizeof(line), "daemon_version=\"%s\"", Version);
4706         set_sys_var(line, strlen(line) + 1, RO);
4707
4708         /*
4709          * Set up for the first time step to install a variable showing
4710          * which syscall is being used to step.
4711          */
4712         set_tod_using = &ntpd_set_tod_using;
4713
4714         getCmdOpts(argc, argv);
4715         init_syntax_tree(&cfgt);
4716         if (
4717                 !lex_init_stack(FindConfig(config_file), "r")
4718 #ifdef HAVE_NETINFO
4719                 /* If there is no config_file, try NetInfo. */
4720                 && check_netinfo && !(config_netinfo = get_netinfo_config())
4721 #endif /* HAVE_NETINFO */
4722                 ) {
4723                 msyslog(LOG_INFO, "getconfig: Couldn't open <%s>: %m", FindConfig(config_file));
4724 #ifndef SYS_WINNT
4725                 io_open_sockets();
4726
4727                 return;
4728 #else
4729                 /* Under WinNT try alternate_config_file name, first NTP.CONF, then NTP.INI */
4730
4731                 if (!lex_init_stack(FindConfig(alt_config_file), "r"))  {
4732                         /*
4733                          * Broadcast clients can sometimes run without
4734                          * a configuration file.
4735                          */
4736                         msyslog(LOG_INFO, "getconfig: Couldn't open <%s>: %m", FindConfig(alt_config_file));
4737                         io_open_sockets();
4738
4739                         return;
4740                 }
4741                 cfgt.source.value.s = estrdup(alt_config_file);
4742 #endif  /* SYS_WINNT */
4743         } else
4744                 cfgt.source.value.s = estrdup(config_file);
4745
4746
4747         /*** BULK OF THE PARSER ***/
4748 #ifdef DEBUG
4749         yydebug = !!(debug >= 5);
4750 #endif
4751         yyparse();
4752         lex_drop_stack();
4753
4754         DPRINTF(1, ("Finished Parsing!!\n"));
4755
4756         cfgt.source.attr = CONF_SOURCE_FILE;
4757         cfgt.timestamp = time(NULL);
4758
4759         save_and_apply_config_tree(TRUE);
4760
4761 #ifdef HAVE_NETINFO
4762         if (config_netinfo)
4763                 free_netinfo_config(config_netinfo);
4764 #endif /* HAVE_NETINFO */
4765 }
4766
4767
4768 void
4769 save_and_apply_config_tree(int/*BOOL*/ input_from_file)
4770 {
4771         config_tree *ptree;
4772 #ifndef SAVECONFIG
4773         config_tree *punlinked;
4774 #endif
4775
4776         /*
4777          * Keep all the configuration trees applied since startup in
4778          * a list that can be used to dump the configuration back to
4779          * a text file.
4780          */
4781         ptree = emalloc(sizeof(*ptree));
4782         memcpy(ptree, &cfgt, sizeof(*ptree));
4783         ZERO(cfgt);
4784
4785         LINK_TAIL_SLIST(cfg_tree_history, ptree, link, config_tree);
4786
4787 #ifdef SAVECONFIG
4788         if (HAVE_OPT( SAVECONFIGQUIT )) {
4789                 FILE *dumpfile;
4790                 int err;
4791                 int dumpfailed;
4792
4793                 dumpfile = fopen(OPT_ARG( SAVECONFIGQUIT ), "w");
4794                 if (NULL == dumpfile) {
4795                         err = errno;
4796                         mfprintf(stderr,
4797                                  "can not create save file %s, error %d %m\n",
4798                                  OPT_ARG(SAVECONFIGQUIT), err);
4799                         exit(err);
4800                 }
4801
4802                 dumpfailed = dump_all_config_trees(dumpfile, 0);
4803                 if (dumpfailed)
4804                         fprintf(stderr,
4805                                 "--saveconfigquit %s error %d\n",
4806                                 OPT_ARG( SAVECONFIGQUIT ),
4807                                 dumpfailed);
4808                 else
4809                         fprintf(stderr,
4810                                 "configuration saved to %s\n",
4811                                 OPT_ARG( SAVECONFIGQUIT ));
4812
4813                 exit(dumpfailed);
4814         }
4815 #endif  /* SAVECONFIG */
4816
4817         /* The actual configuration done depends on whether we are configuring the
4818          * simulator or the daemon. Perform a check and call the appropriate
4819          * function as needed.
4820          */
4821
4822 #ifndef SIM
4823         config_ntpd(ptree, input_from_file);
4824 #else
4825         config_ntpdsim(ptree);
4826 #endif
4827
4828         /*
4829          * With configure --disable-saveconfig, there's no use keeping
4830          * the config tree around after application, so free it.
4831          */
4832 #ifndef SAVECONFIG
4833         UNLINK_SLIST(punlinked, cfg_tree_history, ptree, link,
4834                      config_tree);
4835         INSIST(punlinked == ptree);
4836         free_config_tree(ptree);
4837 #endif
4838 }
4839
4840 /* Hack to disambiguate 'server' statements for refclocks and network peers.
4841  * Please note the qualification 'hack'. It's just that.
4842  */
4843 static int/*BOOL*/
4844 is_refclk_addr(
4845         const address_node * addr
4846         )
4847 {
4848         return addr && addr->address && !strncmp(addr->address, "127.127.", 6);
4849 }
4850
4851 static void
4852 ntpd_set_tod_using(
4853         const char *which
4854         )
4855 {
4856         char line[128];
4857
4858         snprintf(line, sizeof(line), "settimeofday=\"%s\"", which);
4859         set_sys_var(line, strlen(line) + 1, RO);
4860 }
4861
4862
4863 static char *
4864 normal_dtoa(
4865         double d
4866         )
4867 {
4868         char *  buf;
4869         char *  pch_e;
4870         char *  pch_nz;
4871
4872         LIB_GETBUF(buf);
4873         snprintf(buf, LIB_BUFLENGTH, "%g", d);
4874
4875         /* use lowercase 'e', strip any leading zeroes in exponent */
4876         pch_e = strchr(buf, 'e');
4877         if (NULL == pch_e) {
4878                 pch_e = strchr(buf, 'E');
4879                 if (NULL == pch_e)
4880                         return buf;
4881                 *pch_e = 'e';
4882         }
4883         pch_e++;
4884         if ('-' == *pch_e)
4885                 pch_e++;
4886         pch_nz = pch_e;
4887         while ('0' == *pch_nz)
4888                 pch_nz++;
4889         if (pch_nz == pch_e)
4890                 return buf;
4891         strlcpy(pch_e, pch_nz, LIB_BUFLENGTH - (pch_e - buf));
4892
4893         return buf;
4894 }
4895
4896
4897 /* FUNCTIONS COPIED FROM THE OLDER ntp_config.c
4898  * --------------------------------------------
4899  */
4900
4901
4902 /*
4903  * get_pfxmatch - find value for prefixmatch
4904  * and update char * accordingly
4905  */
4906 static u_int32
4907 get_pfxmatch(
4908         const char **   pstr,
4909         struct masks *  m
4910         )
4911 {
4912         while (m->name != NULL) {
4913                 if (strncmp(*pstr, m->name, strlen(m->name)) == 0) {
4914                         *pstr += strlen(m->name);
4915                         return m->mask;
4916                 } else {
4917                         m++;
4918                 }
4919         }
4920         return 0;
4921 }
4922
4923 /*
4924  * get_match - find logmask value
4925  */
4926 static u_int32
4927 get_match(
4928         const char *    str,
4929         struct masks *  m
4930         )
4931 {
4932         while (m->name != NULL) {
4933                 if (strcmp(str, m->name) == 0)
4934                         return m->mask;
4935                 else
4936                         m++;
4937         }
4938         return 0;
4939 }
4940
4941 /*
4942  * get_logmask - build bitmask for ntp_syslogmask
4943  */
4944 static u_int32
4945 get_logmask(
4946         const char *    str
4947         )
4948 {
4949         const char *    t;
4950         u_int32         offset;
4951         u_int32         mask;
4952
4953         mask = get_match(str, logcfg_noclass_items);
4954         if (mask != 0)
4955                 return mask;
4956
4957         t = str;
4958         offset = get_pfxmatch(&t, logcfg_class);
4959         mask   = get_match(t, logcfg_class_items);
4960
4961         if (mask)
4962                 return mask << offset;
4963         else
4964                 msyslog(LOG_ERR, "logconfig: '%s' not recognized - ignored",
4965                         str);
4966
4967         return 0;
4968 }
4969
4970
4971 #ifdef HAVE_NETINFO
4972
4973 /*
4974  * get_netinfo_config - find the nearest NetInfo domain with an ntp
4975  * configuration and initialize the configuration state.
4976  */
4977 static struct netinfo_config_state *
4978 get_netinfo_config(void)
4979 {
4980         ni_status status;
4981         void *domain;
4982         ni_id config_dir;
4983         struct netinfo_config_state *config;
4984
4985         if (ni_open(NULL, ".", &domain) != NI_OK) return NULL;
4986
4987         while ((status = ni_pathsearch(domain, &config_dir, NETINFO_CONFIG_DIR)) == NI_NODIR) {
4988                 void *next_domain;
4989                 if (ni_open(domain, "..", &next_domain) != NI_OK) {
4990                         ni_free(next_domain);
4991                         break;
4992                 }
4993                 ni_free(domain);
4994                 domain = next_domain;
4995         }
4996         if (status != NI_OK) {
4997                 ni_free(domain);
4998                 return NULL;
4999         }
5000
5001         config = emalloc(sizeof(*config));
5002         config->domain = domain;
5003         config->config_dir = config_dir;
5004         config->prop_index = 0;
5005         config->val_index = 0;
5006         config->val_list = NULL;
5007
5008         return config;
5009 }
5010
5011
5012 /*
5013  * free_netinfo_config - release NetInfo configuration state
5014  */
5015 static void
5016 free_netinfo_config(
5017         struct netinfo_config_state *config
5018         )
5019 {
5020         ni_free(config->domain);
5021         free(config);
5022 }
5023
5024
5025 /*
5026  * gettokens_netinfo - return tokens from NetInfo
5027  */
5028 static int
5029 gettokens_netinfo (
5030         struct netinfo_config_state *config,
5031         char **tokenlist,
5032         int *ntokens
5033         )
5034 {
5035         int prop_index = config->prop_index;
5036         int val_index = config->val_index;
5037         char **val_list = config->val_list;
5038
5039         /*
5040          * Iterate through each keyword and look for a property that matches it.
5041          */
5042   again:
5043         if (!val_list) {
5044                 for (; prop_index < COUNTOF(keywords); prop_index++)
5045                 {
5046                         ni_namelist namelist;
5047                         struct keyword current_prop = keywords[prop_index];
5048                         ni_index index;
5049
5050                         /*
5051                          * For each value associated in the property, we're going to return
5052                          * a separate line. We squirrel away the values in the config state
5053                          * so the next time through, we don't need to do this lookup.
5054                          */
5055                         NI_INIT(&namelist);
5056                         if (NI_OK == ni_lookupprop(config->domain,
5057                             &config->config_dir, current_prop.text,
5058                             &namelist)) {
5059
5060                                 /* Found the property, but it has no values */
5061                                 if (namelist.ni_namelist_len == 0) continue;
5062
5063                                 config->val_list =
5064                                     eallocarray(
5065                                         (namelist.ni_namelist_len + 1),
5066                                         sizeof(char*));
5067                                 val_list = config->val_list;
5068
5069                                 for (index = 0;
5070                                      index < namelist.ni_namelist_len;
5071                                      index++) {
5072                                         char *value;
5073
5074                                         value = namelist.ni_namelist_val[index];
5075                                         val_list[index] = estrdup(value);
5076                                 }
5077                                 val_list[index] = NULL;
5078
5079                                 break;
5080                         }
5081                         ni_namelist_free(&namelist);
5082                 }
5083                 config->prop_index = prop_index;
5084         }
5085
5086         /* No list; we're done here. */
5087         if (!val_list)
5088                 return CONFIG_UNKNOWN;
5089
5090         /*
5091          * We have a list of values for the current property.
5092          * Iterate through them and return each in order.
5093          */
5094         if (val_list[val_index]) {
5095                 int ntok = 1;
5096                 int quoted = 0;
5097                 char *tokens = val_list[val_index];
5098
5099                 msyslog(LOG_INFO, "%s %s", keywords[prop_index].text, val_list[val_index]);
5100
5101                 (const char*)tokenlist[0] = keywords[prop_index].text;
5102                 for (ntok = 1; ntok < MAXTOKENS; ntok++) {
5103                         tokenlist[ntok] = tokens;
5104                         while (!ISEOL(*tokens) && (!ISSPACE(*tokens) || quoted))
5105                                 quoted ^= (*tokens++ == '"');
5106
5107                         if (ISEOL(*tokens)) {
5108                                 *tokens = '\0';
5109                                 break;
5110                         } else {                /* must be space */
5111                                 *tokens++ = '\0';
5112                                 while (ISSPACE(*tokens))
5113                                         tokens++;
5114                                 if (ISEOL(*tokens))
5115                                         break;
5116                         }
5117                 }
5118
5119                 if (ntok == MAXTOKENS) {
5120                         /* HMS: chomp it to lose the EOL? */
5121                         msyslog(LOG_ERR,
5122                                 "gettokens_netinfo: too many tokens.  Ignoring: %s",
5123                                 tokens);
5124                 } else {
5125                         *ntokens = ntok + 1;
5126                 }
5127
5128                 config->val_index++;    /* HMS: Should this be in the 'else'? */
5129
5130                 return keywords[prop_index].keytype;
5131         }
5132
5133         /* We're done with the current property. */
5134         prop_index = ++config->prop_index;
5135
5136         /* Free val_list and reset counters. */
5137         for (val_index = 0; val_list[val_index]; val_index++)
5138                 free(val_list[val_index]);
5139         free(val_list);
5140         val_list = config->val_list = NULL;
5141         val_index = config->val_index = 0;
5142
5143         goto again;
5144 }
5145 #endif /* HAVE_NETINFO */
5146
5147
5148 /*
5149  * getnetnum - return a net number (this is crude, but careful)
5150  *
5151  * returns 1 for success, and mysteriously, 0 for most failures, and
5152  * -1 if the address found is IPv6 and we believe IPv6 isn't working.
5153  */
5154 #ifndef SIM
5155 static int
5156 getnetnum(
5157         const char *num,
5158         sockaddr_u *addr,
5159         int complain,
5160         enum gnn_type a_type    /* ignored */
5161         )
5162 {
5163         REQUIRE(AF_UNSPEC == AF(addr) ||
5164                 AF_INET == AF(addr) ||
5165                 AF_INET6 == AF(addr));
5166
5167         if (!is_ip_address(num, AF(addr), addr))
5168                 return 0;
5169
5170         if (IS_IPV6(addr) && !ipv6_works)
5171                 return -1;
5172
5173 # ifdef ISC_PLATFORM_HAVESALEN
5174         addr->sa.sa_len = SIZEOF_SOCKADDR(AF(addr));
5175 # endif
5176         SET_PORT(addr, NTP_PORT);
5177
5178         DPRINTF(2, ("getnetnum given %s, got %s\n", num, stoa(addr)));
5179
5180         return 1;
5181 }
5182 #endif  /* !SIM */
5183
5184 #if defined(HAVE_SETRLIMIT)
5185 void
5186 ntp_rlimit(
5187         int     rl_what,
5188         rlim_t  rl_value,
5189         int     rl_scale,
5190         const char *    rl_sstr
5191         )
5192 {
5193         struct rlimit   rl;
5194
5195         switch (rl_what) {
5196 # ifdef RLIMIT_MEMLOCK
5197             case RLIMIT_MEMLOCK:
5198                 if (HAVE_OPT( SAVECONFIGQUIT )) {
5199                         break;
5200                 }
5201                 /*
5202                  * The default RLIMIT_MEMLOCK is very low on Linux systems.
5203                  * Unless we increase this limit malloc calls are likely to
5204                  * fail if we drop root privilege.  To be useful the value
5205                  * has to be larger than the largest ntpd resident set size.
5206                  */
5207                 DPRINTF(2, ("ntp_rlimit: MEMLOCK: %d %s\n",
5208                         (int)(rl_value / rl_scale), rl_sstr));
5209                 rl.rlim_cur = rl.rlim_max = rl_value;
5210                 if (setrlimit(RLIMIT_MEMLOCK, &rl) == -1)
5211                         msyslog(LOG_ERR, "Cannot set RLIMIT_MEMLOCK: %m");
5212                 break;
5213 # endif /* RLIMIT_MEMLOCK */
5214
5215 # ifdef RLIMIT_NOFILE
5216             case RLIMIT_NOFILE:
5217                 /*
5218                  * For large systems the default file descriptor limit may
5219                  * not be enough.
5220                  */
5221                 DPRINTF(2, ("ntp_rlimit: NOFILE: %d %s\n",
5222                         (int)(rl_value / rl_scale), rl_sstr));
5223                 rl.rlim_cur = rl.rlim_max = rl_value;
5224                 if (setrlimit(RLIMIT_NOFILE, &rl) == -1)
5225                         msyslog(LOG_ERR, "Cannot set RLIMIT_NOFILE: %m");
5226                 break;
5227 # endif /* RLIMIT_NOFILE */
5228
5229 # ifdef RLIMIT_STACK
5230             case RLIMIT_STACK:
5231                 /*
5232                  * Provide a way to set the stack limit to something
5233                  * smaller, so that we don't lock a lot of unused
5234                  * stack memory.
5235                  */
5236                 DPRINTF(2, ("ntp_rlimit: STACK: %d %s pages\n",
5237                             (int)(rl_value / rl_scale), rl_sstr));
5238                 if (-1 == getrlimit(RLIMIT_STACK, &rl)) {
5239                         msyslog(LOG_ERR, "getrlimit(RLIMIT_STACK) failed: %m");
5240                 } else {
5241                         if (rl_value > rl.rlim_max) {
5242                                 msyslog(LOG_WARNING,
5243                                         "ntp_rlimit: using maximum allowed stack limit %lu instead of %lu.",
5244                                         (u_long)rl.rlim_max,
5245                                         (u_long)rl_value);
5246                                 rl_value = rl.rlim_max;
5247                         }
5248                         rl.rlim_cur = rl_value;
5249                         if (-1 == setrlimit(RLIMIT_STACK, &rl)) {
5250                                 msyslog(LOG_ERR,
5251                                         "ntp_rlimit: Cannot set RLIMIT_STACK: %m");
5252                         }
5253                 }
5254                 break;
5255 # endif /* RLIMIT_STACK */
5256
5257             default:
5258                     fatal_error("ntp_rlimit: unexpected RLIMIT case: %d", rl_what);
5259         }
5260 }
5261 #endif  /* HAVE_SETRLIMIT */
5262
5263
5264 char *
5265 build_iflags(u_int32 iflags)
5266 {
5267         static char ifs[1024];
5268
5269         ifs[0] = '\0';
5270
5271         if (iflags & INT_UP) {
5272                 iflags &= ~INT_UP;
5273                 appendstr(ifs, sizeof ifs, "up");
5274         }
5275
5276         if (iflags & INT_PPP) {
5277                 iflags &= ~INT_PPP;
5278                 appendstr(ifs, sizeof ifs, "ppp");
5279         }
5280
5281         if (iflags & INT_LOOPBACK) {
5282                 iflags &= ~INT_LOOPBACK;
5283                 appendstr(ifs, sizeof ifs, "loopback");
5284         }
5285
5286         if (iflags & INT_BROADCAST) {
5287                 iflags &= ~INT_BROADCAST;
5288                 appendstr(ifs, sizeof ifs, "broadcast");
5289         }
5290
5291         if (iflags & INT_MULTICAST) {
5292                 iflags &= ~INT_MULTICAST;
5293                 appendstr(ifs, sizeof ifs, "multicast");
5294         }
5295
5296         if (iflags & INT_BCASTOPEN) {
5297                 iflags &= ~INT_BCASTOPEN;
5298                 appendstr(ifs, sizeof ifs, "bcastopen");
5299         }
5300
5301         if (iflags & INT_MCASTOPEN) {
5302                 iflags &= ~INT_MCASTOPEN;
5303                 appendstr(ifs, sizeof ifs, "mcastopen");
5304         }
5305
5306         if (iflags & INT_WILDCARD) {
5307                 iflags &= ~INT_WILDCARD;
5308                 appendstr(ifs, sizeof ifs, "wildcard");
5309         }
5310
5311         if (iflags & INT_MCASTIF) {
5312                 iflags &= ~INT_MCASTIF;
5313                 appendstr(ifs, sizeof ifs, "MCASTif");
5314         }
5315
5316         if (iflags & INT_PRIVACY) {
5317                 iflags &= ~INT_PRIVACY;
5318                 appendstr(ifs, sizeof ifs, "IPv6privacy");
5319         }
5320
5321         if (iflags & INT_BCASTXMIT) {
5322                 iflags &= ~INT_BCASTXMIT;
5323                 appendstr(ifs, sizeof ifs, "bcastxmit");
5324         }
5325
5326         if (iflags) {
5327                 char string[10];
5328
5329                 snprintf(string, sizeof string, "%0x", iflags);
5330                 appendstr(ifs, sizeof ifs, string);
5331         }
5332
5333         return ifs;
5334 }
5335
5336
5337 char *
5338 build_mflags(u_short mflags)
5339 {
5340         static char mfs[1024];
5341
5342         mfs[0] = '\0';
5343
5344         if (mflags & RESM_NTPONLY) {
5345                 mflags &= ~RESM_NTPONLY;
5346                 appendstr(mfs, sizeof mfs, "ntponly");
5347         }
5348
5349         if (mflags & RESM_SOURCE) {
5350                 mflags &= ~RESM_SOURCE;
5351                 appendstr(mfs, sizeof mfs, "source");
5352         }
5353
5354         if (mflags) {
5355                 char string[10];
5356
5357                 snprintf(string, sizeof string, "%0x", mflags);
5358                 appendstr(mfs, sizeof mfs, string);
5359         }
5360
5361         return mfs;
5362 }
5363
5364
5365 char *
5366 build_rflags(u_short rflags)
5367 {
5368         static char rfs[1024];
5369
5370         rfs[0] = '\0';
5371
5372         if (rflags & RES_FLAKE) {
5373                 rflags &= ~RES_FLAKE;
5374                 appendstr(rfs, sizeof rfs, "flake");
5375         }
5376
5377         if (rflags & RES_IGNORE) {
5378                 rflags &= ~RES_IGNORE;
5379                 appendstr(rfs, sizeof rfs, "ignore");
5380         }
5381
5382         if (rflags & RES_KOD) {
5383                 rflags &= ~RES_KOD;
5384                 appendstr(rfs, sizeof rfs, "kod");
5385         }
5386
5387         if (rflags & RES_MSSNTP) {
5388                 rflags &= ~RES_MSSNTP;
5389                 appendstr(rfs, sizeof rfs, "mssntp");
5390         }
5391
5392         if (rflags & RES_LIMITED) {
5393                 rflags &= ~RES_LIMITED;
5394                 appendstr(rfs, sizeof rfs, "limited");
5395         }
5396
5397         if (rflags & RES_LPTRAP) {
5398                 rflags &= ~RES_LPTRAP;
5399                 appendstr(rfs, sizeof rfs, "lptrap");
5400         }
5401
5402         if (rflags & RES_NOMODIFY) {
5403                 rflags &= ~RES_NOMODIFY;
5404                 appendstr(rfs, sizeof rfs, "nomodify");
5405         }
5406
5407         if (rflags & RES_NOMRULIST) {
5408                 rflags &= ~RES_NOMRULIST;
5409                 appendstr(rfs, sizeof rfs, "nomrulist");
5410         }
5411
5412         if (rflags & RES_NOEPEER) {
5413                 rflags &= ~RES_NOEPEER;
5414                 appendstr(rfs, sizeof rfs, "noepeer");
5415         }
5416
5417         if (rflags & RES_NOPEER) {
5418                 rflags &= ~RES_NOPEER;
5419                 appendstr(rfs, sizeof rfs, "nopeer");
5420         }
5421
5422         if (rflags & RES_NOQUERY) {
5423                 rflags &= ~RES_NOQUERY;
5424                 appendstr(rfs, sizeof rfs, "noquery");
5425         }
5426
5427         if (rflags & RES_DONTSERVE) {
5428                 rflags &= ~RES_DONTSERVE;
5429                 appendstr(rfs, sizeof rfs, "dontserve");
5430         }
5431
5432         if (rflags & RES_NOTRAP) {
5433                 rflags &= ~RES_NOTRAP;
5434                 appendstr(rfs, sizeof rfs, "notrap");
5435         }
5436
5437         if (rflags & RES_DONTTRUST) {
5438                 rflags &= ~RES_DONTTRUST;
5439                 appendstr(rfs, sizeof rfs, "notrust");
5440         }
5441
5442         if (rflags & RES_VERSION) {
5443                 rflags &= ~RES_VERSION;
5444                 appendstr(rfs, sizeof rfs, "version");
5445         }
5446
5447         if (rflags) {
5448                 char string[10];
5449
5450                 snprintf(string, sizeof string, "%0x", rflags);
5451                 appendstr(rfs, sizeof rfs, string);
5452         }
5453
5454         if ('\0' == rfs[0]) {
5455                 appendstr(rfs, sizeof rfs, "(none)");
5456         }
5457
5458         return rfs;
5459 }
5460
5461
5462 static void
5463 appendstr(
5464         char *string,
5465         size_t s,
5466         char *new
5467         )
5468 {
5469         if (*string != '\0') {
5470                 (void)strlcat(string, ",", s);
5471         }
5472         (void)strlcat(string, new, s);
5473
5474         return;
5475 }