unbound/util/config_file.h

   1 /*
   2  * util/config_file.h - reads and stores the config file for unbound.
   3  *
   4  * Copyright (c) 2007, NLnet Labs. All rights reserved.
   5  *
   6  * This software is open source.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * Redistributions of source code must retain the above copyright notice,
  13  * this list of conditions and the following disclaimer.
  14  *
  15  * Redistributions in binary form must reproduce the above copyright notice,
  16  * this list of conditions and the following disclaimer in the documentation
  17  * and/or other materials provided with the distribution.
  18  *
  19  * Neither the name of the NLNET LABS nor the names of its contributors may
  20  * be used to endorse or promote products derived from this software without
  21  * specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  26  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  29  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  30  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /**
  37  * \file
  38  *
  39  * This file contains functions for the config file.
  40  */
  41
  42 #ifndef UTIL_CONFIG_FILE_H
  43 #define UTIL_CONFIG_FILE_H
  44 struct config_stub;
  45 struct config_strlist;
  46 struct config_str2list;
  47 struct module_qstate;
  48 struct sock_list;
  49 struct ub_packed_rrset_key;
  50
  51 /**
  52  * The configuration options.
  53  * Strings are malloced.
  54  */
  55 struct config_file {
  56         /** verbosity level as specified in the config file */
  57         int verbosity;
  58
  59         /** statistics interval (in seconds) */
  60         int stat_interval;
  61         /** if false, statistics values are reset after printing them */
  62         int stat_cumulative;
  63         /** if true, the statistics are kept in greater detail */
  64         int stat_extended;
  65
  66         /** number of threads to create */
  67         int num_threads;
  68
  69         /** port on which queries are answered. */
  70         int port;
  71         /** do ip4 query support. */
  72         int do_ip4;
  73         /** do ip6 query support. */
  74         int do_ip6;
  75         /** do udp query support. */
  76         int do_udp;
  77         /** do tcp query support. */
  78         int do_tcp;
  79         /** tcp upstream queries (no UDP upstream queries) */
  80         int tcp_upstream;
  81
  82         /** private key file for dnstcp-ssl service (enabled if not NULL) */
  83         char* ssl_service_key;
  84         /** public key file for dnstcp-ssl service */
  85         char* ssl_service_pem;
  86         /** port on which to provide ssl service */
  87         int ssl_port;
  88         /** if outgoing tcp connections use SSL */
  89         int ssl_upstream;
  90
  91         /** outgoing port range number of ports (per thread) */
  92         int outgoing_num_ports;
  93         /** number of outgoing tcp buffers per (per thread) */
  94         size_t outgoing_num_tcp;
  95         /** number of incoming tcp buffers per (per thread) */
  96         size_t incoming_num_tcp;
  97         /** allowed udp port numbers, array with 0 if not allowed */
  98         int* outgoing_avail_ports;
  99
 100         /** EDNS buffer size to use */
 101         size_t edns_buffer_size;
 102         /** number of bytes buffer size for DNS messages */
 103         size_t msg_buffer_size;
 104         /** size of the message cache */
 105         size_t msg_cache_size;
 106         /** slabs in the message cache. */
 107         size_t msg_cache_slabs;
 108         /** number of queries every thread can service */
 109         size_t num_queries_per_thread;
 110         /** number of msec to wait before items can be jostled out */
 111         size_t jostle_time;
 112         /** size of the rrset cache */
 113         size_t rrset_cache_size;
 114         /** slabs in the rrset cache */
 115         size_t rrset_cache_slabs;
 116         /** host cache ttl in seconds */
 117         int host_ttl;
 118         /** number of slabs in the infra host cache */
 119         size_t infra_cache_slabs;
 120         /** max number of hosts in the infra cache */
 121         size_t infra_cache_numhosts;
 122         /** delay close of udp-timeouted ports, if 0 no delayclose. in msec */
 123         int delay_close;
 124
 125         /** the target fetch policy for the iterator */
 126         char* target_fetch_policy;
 127
 128         /** automatic interface for incoming messages. Uses ipv6 remapping,
 129          * and recvmsg/sendmsg ancillary data to detect interfaces, boolean */
 130         int if_automatic;
 131         /** SO_RCVBUF size to set on port 53 UDP socket */
 132         size_t so_rcvbuf;
 133         /** SO_SNDBUF size to set on port 53 UDP socket */
 134         size_t so_sndbuf;
 135         /** SO_REUSEPORT requested on port 53 sockets */
 136         int so_reuseport;
 137
 138         /** number of interfaces to open. If 0 default all interfaces. */
 139         int num_ifs;
 140         /** interface description strings (IP addresses) */
 141         char **ifs;
 142
 143         /** number of outgoing interfaces to open.
 144          * If 0 default all interfaces. */
 145         int num_out_ifs;
 146         /** outgoing interface description strings (IP addresses) */
 147         char **out_ifs;
 148
 149         /** the root hints */
 150         struct config_strlist* root_hints;
 151         /** the stub definitions, linked list */
 152         struct config_stub* stubs;
 153         /** the forward zone definitions, linked list */
 154         struct config_stub* forwards;
 155         /** list of donotquery addresses, linked list */
 156         struct config_strlist* donotqueryaddrs;
 157         /** list of access control entries, linked list */
 158         struct config_str2list* acls;
 159         /** use default localhost donotqueryaddr entries */
 160         int donotquery_localhost;
 161
 162         /** harden against very small edns buffer sizes */
 163         int harden_short_bufsize;
 164         /** harden against very large query sizes */
 165         int harden_large_queries;
 166         /** harden against spoofed glue (out of zone data) */
 167         int harden_glue;
 168         /** harden against receiving no DNSSEC data for trust anchor */
 169         int harden_dnssec_stripped;
 170         /** harden against queries that fall under known nxdomain names */
 171         int harden_below_nxdomain;
 172         /** harden the referral path, query for NS,A,AAAA and validate */
 173         int harden_referral_path;
 174         /** use 0x20 bits in query as random ID bits */
 175         int use_caps_bits_for_id;
 176         /** strip away these private addrs from answers, no DNS Rebinding */
 177         struct config_strlist* private_address;
 178         /** allow domain (and subdomains) to use private address space */
 179         struct config_strlist* private_domain;
 180         /** what threshold for unwanted action. */
 181         size_t unwanted_threshold;
 182         /** the number of seconds maximal TTL used for RRsets and messages */
 183         int max_ttl;
 184         /** the number of seconds minimum TTL used for RRsets and messages */
 185         int min_ttl;
 186         /** if prefetching of messages should be performed. */
 187         int prefetch;
 188         /** if prefetching of DNSKEYs should be performed. */
 189         int prefetch_key;
 190
 191         /** chrootdir, if not "" or chroot will be done */
 192         char* chrootdir;
 193         /** username to change to, if not "". */
 194         char* username;
 195         /** working directory */
 196         char* directory;
 197         /** filename to log to. */
 198         char* logfile;
 199         /** pidfile to write pid to. */
 200         char* pidfile;
 201
 202         /** should log messages be sent to syslogd */
 203         int use_syslog;
 204         /** log timestamp in ascii UTC */
 205         int log_time_ascii;
 206         /** log queries with one line per query */
 207         int log_queries;
 208
 209         /** do not report identity (id.server, hostname.bind) */
 210         int hide_identity;
 211         /** do not report version (version.server, version.bind) */
 212         int hide_version;
 213         /** identity, hostname is returned if "". */
 214         char* identity;
 215         /** version, package version returned if "". */
 216         char* version;
 217
 218         /** the module configuration string */
 219         char* module_conf;
 220
 221         /** files with trusted DS and DNSKEYs in zonefile format, list */
 222         struct config_strlist* trust_anchor_file_list;
 223         /** list of trustanchor keys, linked list */
 224         struct config_strlist* trust_anchor_list;
 225         /** files with 5011 autotrust tracked keys */
 226         struct config_strlist* auto_trust_anchor_file_list;
 227         /** files with trusted DNSKEYs in named.conf format, list */
 228         struct config_strlist* trusted_keys_file_list;
 229         /** DLV anchor file */
 230         char* dlv_anchor_file;
 231         /** DLV anchor inline */
 232         struct config_strlist* dlv_anchor_list;
 233         /** insecure domain list */
 234         struct config_strlist* domain_insecure;
 235
 236         /** if not 0, this value is the validation date for RRSIGs */
 237         int32_t val_date_override;
 238         /** the minimum for signature clock skew */
 239         int32_t val_sig_skew_min;
 240         /** the maximum for signature clock skew */
 241         int32_t val_sig_skew_max;
 242         /** this value sets the number of seconds before revalidating bogus */
 243         int bogus_ttl;
 244         /** should validator clean additional section for secure msgs */
 245         int val_clean_additional;
 246         /** log bogus messages by the validator */
 247         int val_log_level;
 248         /** squelch val_log_level to log - this is library goes to callback */
 249         int val_log_squelch;
 250         /** should validator allow bogus messages to go through */
 251         int val_permissive_mode;
 252         /** ignore the CD flag in incoming queries and refuse them bogus data */
 253         int ignore_cd;
 254         /** nsec3 maximum iterations per key size, string */
 255         char* val_nsec3_key_iterations;
 256         /** autotrust add holddown time, in seconds */
 257         unsigned int add_holddown;
 258         /** autotrust del holddown time, in seconds */
 259         unsigned int del_holddown;
 260         /** autotrust keep_missing time, in seconds. 0 is forever. */
 261         unsigned int keep_missing;
 262
 263         /** size of the key cache */
 264         size_t key_cache_size;
 265         /** slabs in the key cache. */
 266         size_t key_cache_slabs;
 267         /** size of the neg cache */
 268         size_t neg_cache_size;
 269
 270         /** local zones config */
 271         struct config_str2list* local_zones;
 272         /** local zones nodefault list */
 273         struct config_strlist* local_zones_nodefault;
 274         /** local data RRs configged */
 275         struct config_strlist* local_data;
 276         /** unblock lan zones (reverse lookups for 10/8 and so on) */
 277         int unblock_lan_zones;
 278
 279         /** remote control section. enable toggle. */
 280         int remote_control_enable;
 281         /** the interfaces the remote control should listen on */
 282         struct config_strlist* control_ifs;
 283         /** port number for the control port */
 284         int control_port;
 285         /** private key file for server */
 286         char* server_key_file;
 287         /** certificate file for server */
 288         char* server_cert_file;
 289         /** private key file for unbound-control */
 290         char* control_key_file;
 291         /** certificate file for unbound-control */
 292         char* control_cert_file;
 293
 294         /** Python script file */
 295         char* python_script;
 296
 297         /** daemonize, i.e. fork into the background. */
 298         int do_daemonize;
 299
 300         /* minimal response when positive answer */
 301         int minimal_responses;
 302
 303         /* RRSet roundrobin */
 304         int rrset_roundrobin;
 305
 306         /* maximum UDP response size */
 307         size_t max_udp_size;
 308
 309         /* DNS64 prefix */
 310         char* dns64_prefix;
 311
 312         /* Synthetize all AAAA record despite the presence of an authoritative one */
 313         int dns64_synthall;
 314
 315         /** true to enable dnstap support */
 316         int dnstap;
 317         /** dnstap socket path */
 318         char* dnstap_socket_path;
 319         /** true to send "identity" via dnstap */
 320         int dnstap_send_identity;
 321         /** true to send "version" via dnstap */
 322         int dnstap_send_version;
 323         /** dnstap "identity", hostname is used if "". */
 324         char* dnstap_identity;
 325         /** dnstap "version", package version is used if "". */
 326         char* dnstap_version;
 327
 328         /** true to log dnstap RESOLVER_QUERY message events */
 329         int dnstap_log_resolver_query_messages;
 330         /** true to log dnstap RESOLVER_RESPONSE message events */
 331         int dnstap_log_resolver_response_messages;
 332         /** true to log dnstap CLIENT_QUERY message events */
 333         int dnstap_log_client_query_messages;
 334         /** true to log dnstap CLIENT_RESPONSE message events */
 335         int dnstap_log_client_response_messages;
 336         /** true to log dnstap FORWARDER_QUERY message events */
 337         int dnstap_log_forwarder_query_messages;
 338         /** true to log dnstap FORWARDER_RESPONSE message events */
 339         int dnstap_log_forwarder_response_messages;
 340 };
 341
 342 /**
 343  * Stub config options
 344  */
 345 struct config_stub {
 346         /** next in list */
 347         struct config_stub* next;
 348         /** domain name (in text) of the stub apex domain */
 349         char* name;
 350         /** list of stub nameserver hosts (domain name) */
 351         struct config_strlist* hosts;
 352         /** list of stub nameserver addresses (IP address) */
 353         struct config_strlist* addrs;
 354         /** if stub-prime is set */
 355         int isprime;
 356         /** if forward-first is set (failover to without if fails) */
 357         int isfirst;
 358 };
 359
 360 /**
 361  * List of strings for config options
 362  */
 363 struct config_strlist {
 364         /** next item in list */
 365         struct config_strlist* next;
 366         /** config option string */
 367         char* str;
 368 };
 369
 370 /**
 371  * List of two strings for config options
 372  */
 373 struct config_str2list {
 374         /** next item in list */
 375         struct config_str2list* next;
 376         /** first string */
 377         char* str;
 378         /** second string */
 379         char* str2;
 380 };
 381
 382 /** List head for strlist processing, used for append operation. */
 383 struct config_strlist_head {
 384         /** first in list of text items */
 385         struct config_strlist* first;
 386         /** last in list of text items */
 387         struct config_strlist* last;
 388 };
 389
 390 /**
 391  * Create config file structure. Filled with default values.
 392  * @return: the new structure or NULL on memory error.
 393  */
 394 struct config_file* config_create(void);
 395
 396 /**
 397  * Create config file structure for library use. Filled with default values.
 398  * @return: the new structure or NULL on memory error.
 399  */
 400 struct config_file* config_create_forlib(void);
 401
 402 /**
 403  * Read the config file from the specified filename.
 404  * @param config: where options are stored into, must be freshly created.
 405  * @param filename: name of configfile. If NULL nothing is done.
 406  * @param chroot: if not NULL, the chroot dir currently in use (for include).
 407  * @return: false on error. In that case errno is set, ENOENT means
 408  *      file not found.
 409  */
 410 int config_read(struct config_file* config, const char* filename,
 411         const char* chroot);
 412
 413 /**
 414  * Destroy the config file structure.
 415  * @param config: to delete.
 416  */
 417 void config_delete(struct config_file* config);
 418
 419 /**
 420  * Apply config to global constants; this routine is called in single thread.
 421  * @param config: to apply. Side effect: global constants change.
 422  */
 423 void config_apply(struct config_file* config);
 424
 425 /**
 426  * Set the given keyword to the given value.
 427  * @param config: where to store config
 428  * @param option: option name, including the ':' character.
 429  * @param value: value, this string is copied if needed, or parsed.
 430  *      The caller owns the value string.
 431  * @return 0 on error (malloc or syntax error).
 432  */
 433 int config_set_option(struct config_file* config, const char* option,
 434         const char* value);
 435
 436 /**
 437  * Call print routine for the given option.
 438  * @param cfg: config.
 439  * @param opt: option name without trailing :.
 440  *      This is different from config_set_option.
 441  * @param func: print func, called as (str, arg) for every data element.
 442  * @param arg: user argument for print func.
 443  * @return false if the option name is not supported (syntax error).
 444  */
 445 int config_get_option(struct config_file* cfg, const char* opt,
 446         void (*func)(char*,void*), void* arg);
 447
 448 /**
 449  * Get an option and return strlist
 450  * @param cfg: config file
 451  * @param opt: option name.
 452  * @param list: list is returned here. malloced, caller must free it.
 453  * @return 0=OK, 1=syntax error, 2=malloc failed.
 454  */
 455 int config_get_option_list(struct config_file* cfg, const char* opt,
 456         struct config_strlist** list);
 457
 458 /**
 459  * Get an option and collate results into string
 460  * @param cfg: config file
 461  * @param opt: option name.
 462  * @param str: string. malloced, caller must free it.
 463  * @return 0=OK, 1=syntax error, 2=malloc failed.
 464  */
 465 int config_get_option_collate(struct config_file* cfg, const char* opt,
 466         char** str);
 467
 468 /**
 469  * function to print to a file, use as func with config_get_option.
 470  * @param line: text to print. \n appended.
 471  * @param arg: pass a FILE*, like stdout.
 472  */
 473 void config_print_func(char* line, void* arg);
 474
 475 /**
 476  * function to collate the text strings into a strlist_head.
 477  * @param line: text to append.
 478  * @param arg: pass a strlist_head structure. zeroed on start.
 479  */
 480 void config_collate_func(char* line, void* arg);
 481
 482 /**
 483  * take a strlist_head list and return a malloc string. separated with newline.
 484  * @param list: strlist first to collate. zeroes return "".
 485  * @return NULL on malloc failure. Or if malloc failure happened in strlist.
 486  */
 487 char* config_collate_cat(struct config_strlist* list);
 488
 489 /**
 490  * Append text at end of list.
 491  * @param list: list head. zeroed at start.
 492  * @param item: new item. malloced by caller. if NULL the insertion fails.
 493  * @return true on success.
 494  */
 495 int cfg_strlist_append(struct config_strlist_head* list, char* item);
 496
 497 /**
 498  * Insert string into strlist.
 499  * @param head: pointer to strlist head variable.
 500  * @param item: new item. malloced by caller. If NULL the insertion fails.
 501  * @return: true on success.
 502  */
 503 int cfg_strlist_insert(struct config_strlist** head, char* item);
 504
 505 /**
 506  * Insert string into str2list.
 507  * @param head: pointer to str2list head variable.
 508  * @param item: new item. malloced by caller. If NULL the insertion fails.
 509  * @param i2: 2nd string, malloced by caller. If NULL the insertion fails.
 510  * @return: true on success.
 511  */
 512 int cfg_str2list_insert(struct config_str2list** head, char* item, char* i2);
 513
 514 /**
 515  * Delete items in config string list.
 516  * @param list: list.
 517  */
 518 void config_delstrlist(struct config_strlist* list);
 519
 520 /**
 521  * Delete items in config double string list.
 522  * @param list: list.
 523  */
 524 void config_deldblstrlist(struct config_str2list* list);
 525
 526 /**
 527  * Delete items in config stub list.
 528  * @param list: list.
 529  */
 530 void config_delstubs(struct config_stub* list);
 531
 532 /**
 533  * Convert 14digit to time value
 534  * @param str: string of 14 digits
 535  * @return time value or 0 for error.
 536  */
 537 time_t cfg_convert_timeval(const char* str);
 538
 539 /**
 540  * Count number of values in the string.
 541  * format ::= (sp num)+ sp
 542  * num ::= [-](0-9)+
 543  * sp ::= (space|tab)*
 544  *
 545  * @param str: string
 546  * @return: 0 on parse error, or empty string, else
 547  *      number of integer values in the string.
 548  */
 549 int cfg_count_numbers(const char* str);
 550
 551 /**
 552  * Convert a 'nice' memory or file size into a bytecount
 553  * From '100k' to 102400. and so on. Understands kKmMgG.
 554  * k=1024, m=1024*1024, g=1024*1024*1024.
 555  * @param str: string
 556  * @param res: result is stored here, size in bytes.
 557  * @return: true if parsed correctly, or 0 on a parse error (and an error
 558  * is logged).
 559  */
 560 int cfg_parse_memsize(const char* str, size_t* res);
 561
 562 /**
 563  * Parse local-zone directive into two strings and register it in the config.
 564  * @param cfg: to put it in.
 565  * @param val: argument strings to local-zone, "example.com nodefault".
 566  * @return: false on failure
 567  */
 568 int cfg_parse_local_zone(struct config_file* cfg, const char* val);
 569
 570 /**
 571  * Mark "number" or "low-high" as available or not in ports array.
 572  * @param str: string in input
 573  * @param allow: give true if this range is permitted.
 574  * @param avail: the array from cfg.
 575  * @param num: size of the array (65536).
 576  * @return: true if parsed correctly, or 0 on a parse error (and an error
 577  * is logged).
 578  */
 579 int cfg_mark_ports(const char* str, int allow, int* avail, int num);
 580
 581 /**
 582  * Get a condensed list of ports returned. allocated.
 583  * @param cfg: config file.
 584  * @param avail: the available ports array is returned here.
 585  * @return: number of ports in array or 0 on error.
 586  */
 587 int cfg_condense_ports(struct config_file* cfg, int** avail);
 588
 589 /**
 590  * Scan ports available
 591  * @param avail: the array from cfg.
 592  * @param num: size of the array (65536).
 593  * @return the number of ports available for use.
 594  */
 595 int cfg_scan_ports(int* avail, int num);
 596
 597 /**
 598  * Convert a filename to full pathname in original filesys
 599  * @param fname: the path name to convert.
 600  *      Must not be null or empty.
 601  * @param cfg: config struct for chroot and chdir (if set).
 602  * @param use_chdir: if false, only chroot is applied.
 603  * @return pointer to malloced buffer which is: [chroot][chdir]fname
 604  *      or NULL on malloc failure.
 605  */
 606 char* fname_after_chroot(const char* fname, struct config_file* cfg,
 607         int use_chdir);
 608
 609 /**
 610  * Convert a ptr shorthand into a full reverse-notation PTR record.
 611  * @param str: input string, "IP name"
 612  * @return: malloced string "reversed-ip-name PTR name"
 613  */
 614 char* cfg_ptr_reverse(char* str);
 615
 616 /**
 617  * Append text to the error info for validation.
 618  * @param qstate: query state.
 619  * @param str: copied into query region and appended.
 620  * Failures to allocate are logged.
 621  */
 622 void errinf(struct module_qstate* qstate, const char* str);
 623
 624 /**
 625  * Append text to error info:  from 1.2.3.4
 626  * @param qstate: query state.
 627  * @param origin: sock list with origin of trouble.
 628  *      Every element added.
 629  *      If NULL: nothing is added.
 630  *      if 0len element: 'from cache' is added.
 631  */
 632 void errinf_origin(struct module_qstate* qstate, struct sock_list *origin);
 633
 634 /**
 635  * Append text to error info:  for RRset name type class
 636  * @param qstate: query state.
 637  * @param rr: rrset_key.
 638  */
 639 void errinf_rrset(struct module_qstate* qstate, struct ub_packed_rrset_key *rr);
 640
 641 /**
 642  * Append text to error info:  str dname
 643  * @param qstate: query state.
 644  * @param str: explanation string
 645  * @param dname: the dname.
 646  */
 647 void errinf_dname(struct module_qstate* qstate, const char* str,
 648         uint8_t* dname);
 649
 650 /**
 651  * Create error info in string
 652  * @param qstate: query state.
 653  * @return string or NULL on malloc failure (already logged).
 654  *    This string is malloced and has to be freed by caller.
 655  */
 656 char* errinf_to_str(struct module_qstate* qstate);
 657
 658 /**
 659  * Used during options parsing
 660  */
 661 struct config_parser_state {
 662         /** name of file being parser */
 663         char* filename;
 664         /** line number in the file, starts at 1 */
 665         int line;
 666         /** number of errors encountered */
 667         int errors;
 668         /** the result of parsing is stored here. */
 669         struct config_file* cfg;
 670         /** the current chroot dir (or NULL if none) */
 671         const char* chroot;
 672 };
 673
 674 /** global config parser object used during config parsing */
 675 extern struct config_parser_state* cfg_parser;
 676 /** init lex state */
 677 void init_cfg_parse(void);
 678 /** lex in file */
 679 extern FILE* ub_c_in;
 680 /** lex out file */
 681 extern FILE* ub_c_out;
 682 /** the yacc lex generated parse function */
 683 int ub_c_parse(void);
 684 /** the lexer function */
 685 int ub_c_lex(void);
 686 /** wrap function */
 687 int ub_c_wrap(void);
 688 /** parsing helpers: print error with file and line numbers */
 689 void ub_c_error(const char* msg);
 690 /** parsing helpers: print error with file and line numbers */
 691 void ub_c_error_msg(const char* fmt, ...) ATTR_FORMAT(printf, 1, 2);
 692
 693 #ifdef UB_ON_WINDOWS
 694 /**
 695  * Obtain registry string (if it exists).
 696  * @param key: key string
 697  * @param name: name of value to fetch.
 698  * @return malloced string with the result or NULL if it did not
 699  *      exist on an error (logged with log_err) was encountered.
 700  */
 701 char* w_lookup_reg_str(const char* key, const char* name);
 702 #endif /* UB_ON_WINDOWS */
 703
 704 #endif /* UTIL_CONFIG_FILE_H */