src/src/functions.h

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2012 */
   6 /* See the file NOTICE for conditions of use and distribution. */
   7
   8
   9 /* Prototypes for functions that appear in various modules. Gathered together
  10 to avoid having a lot of tiddly little headers with only a couple of lines in
  11 them. However, some functions that are used (or not used) by utility programs
  12 are in in fact in separate headers. */
  13
  14
  15 #ifdef EXIM_PERL
  16 extern uschar *call_perl_cat(uschar *, int *, int *, uschar **, uschar *,
  17                  uschar **);
  18 extern void    cleanup_perl(void);
  19 extern uschar *init_perl(uschar *);
  20 #endif
  21
  22
  23 #ifdef SUPPORT_TLS
  24 extern const char *
  25                std_dh_prime_default(void);
  26 extern const char *
  27                std_dh_prime_named(const uschar *);
  28 extern int     tls_client_start(int, host_item *, address_item *, uschar *,
  29                  uschar *, uschar *, uschar *, uschar *, uschar *, uschar *,
  30                  int, int);
  31 extern void    tls_close(BOOL);
  32 extern int     tls_feof(void);
  33 extern int     tls_ferror(void);
  34 extern int     tls_getc(void);
  35 extern int     tls_read(uschar *, size_t);
  36 extern int     tls_server_start(const uschar *);
  37 extern BOOL    tls_smtp_buffered(void);
  38 extern int     tls_ungetc(int);
  39 extern int     tls_write(const uschar *, size_t);
  40 extern uschar *tls_validate_require_cipher(void);
  41 extern void    tls_version_report(FILE *);
  42 #ifndef USE_GNUTLS
  43 extern BOOL    tls_openssl_options_parse(uschar *, long *);
  44 #endif
  45 #endif
  46
  47
  48 /* Everything else... */
  49
  50 extern acl_block *acl_read(uschar *(*)(void), uschar **);
  51 extern int     acl_check(int, uschar *, uschar *, uschar **, uschar **);
  52 extern tree_node *acl_var_create(uschar *);
  53 extern void    acl_var_write(uschar *, uschar *, void *);
  54 extern uschar *auth_b64encode(uschar *, int);
  55 extern int     auth_b64decode(uschar *, uschar **);
  56 extern int     auth_call_pam(uschar *, uschar **);
  57 extern int     auth_call_pwcheck(uschar *, uschar **);
  58 extern int     auth_call_radius(uschar *, uschar **);
  59 extern int     auth_call_saslauthd(uschar *, uschar *, uschar *, uschar *,
  60                  uschar **);
  61 extern int     auth_check_serv_cond(auth_instance *);
  62 extern int     auth_check_some_cond(auth_instance *, uschar *, uschar *, int);
  63
  64 extern int     auth_get_data(uschar **, uschar *, int);
  65 extern int     auth_get_no64_data(uschar **, uschar *);
  66 extern uschar *auth_xtextencode(uschar *, int);
  67 extern int     auth_xtextdecode(uschar *, uschar **);
  68
  69 extern int     check_host(void *, uschar *, uschar **, uschar **);
  70 extern uschar **child_exec_exim(int, BOOL, int *, BOOL, int, ...);
  71 extern pid_t   child_open_uid(uschar **, uschar **, int, uid_t *, gid_t *,
  72                  int *, int *, uschar *, BOOL);
  73
  74 extern void    daemon_go(void);
  75
  76 #ifdef EXPERIMENTAL_DCC
  77 extern int     dcc_process(uschar **);
  78 #endif
  79
  80 extern void    debug_logging_activate(uschar *, uschar *);
  81 extern void    debug_print_argv(uschar **);
  82 extern void    debug_print_ids(uschar *);
  83 extern void    debug_print_string(uschar *);
  84 extern void    debug_print_tree(tree_node *);
  85 extern void    debug_vprintf(const char *, va_list);
  86 extern void    decode_bits(unsigned int *, unsigned int *,
  87                   int, int, uschar *, bit_table *, int, uschar *, int);
  88 extern address_item *deliver_make_addr(uschar *, BOOL);
  89 extern int     deliver_message(uschar *, BOOL, BOOL);
  90 extern void    deliver_msglog(const char *, ...) PRINTF_FUNCTION(1,2);
  91 extern void    deliver_set_expansions(address_item *);
  92 extern int     deliver_split_address(address_item *);
  93 extern void    deliver_succeeded(address_item *);
  94 #ifdef WITH_OLD_DEMIME
  95 extern int     demime(uschar **);
  96 #endif
  97 extern BOOL    directory_make(const uschar *, const uschar *, int, BOOL);
  98 #ifndef DISABLE_DKIM
  99 extern BOOL    dkim_transport_write_message(address_item *, int, int,
 100                    int, uschar *, uschar *, uschar *, uschar *, rewrite_rule *,
 101                    int, uschar *, uschar *, uschar *, uschar *, uschar *, uschar *);
 102 #endif
 103 extern dns_address *dns_address_from_rr(dns_answer *, dns_record *);
 104 extern void    dns_build_reverse(uschar *, uschar *);
 105 extern void    dns_init(BOOL, BOOL);
 106 extern int     dns_basic_lookup(dns_answer *, uschar *, int);
 107 extern BOOL    dns_is_secure(dns_answer *);
 108 extern int     dns_lookup(dns_answer *, uschar *, int, uschar **);
 109 extern int     dns_special_lookup(dns_answer *, uschar *, int, uschar **);
 110 extern dns_record *dns_next_rr(dns_answer *, dns_scan *, int);
 111 extern uschar *dns_text_type(int);
 112 extern void    dscp_list_to_stream(FILE *);
 113 extern BOOL    dscp_lookup(const uschar *, int, int *, int *, int *);
 114
 115 extern void    enq_end(uschar *);
 116 extern BOOL    enq_start(uschar *);
 117 extern void    exim_exit(int);
 118 extern void    exim_nullstd(void);
 119 extern void    exim_setugid(uid_t, gid_t, BOOL, uschar *);
 120 extern int     exim_tvcmp(struct timeval *, struct timeval *);
 121 extern void    exim_wait_tick(struct timeval *, int);
 122 extern BOOL    expand_check_condition(uschar *, uschar *, uschar *);
 123 extern uschar *expand_string(uschar *);
 124 extern uschar *expand_string_copy(uschar *);
 125 extern int_eximarith_t expand_string_integer(uschar *, BOOL);
 126
 127 extern int     filter_interpret(uschar *, int, address_item **, uschar **);
 128 extern BOOL    filter_personal(string_item *, BOOL);
 129 extern BOOL    filter_runtest(int, uschar *, BOOL, BOOL);
 130 extern BOOL    filter_system_interpret(address_item **, uschar **);
 131
 132 extern void    header_add(int, const char *, ...);
 133 extern int     header_checkname(header_line *, BOOL);
 134 extern BOOL    header_match(uschar *, BOOL, BOOL, string_item *, int, ...);
 135 extern int     host_address_extract_port(uschar *);
 136 extern uschar *host_and_ident(BOOL);
 137 extern int     host_aton(uschar *, int *);
 138 extern void    host_build_hostlist(host_item **, uschar *, BOOL);
 139 extern ip_address_item *host_build_ifacelist(uschar *, uschar *);
 140 extern void    host_build_log_info(void);
 141 extern void    host_build_sender_fullhost(void);
 142 extern BOOL    host_find_byname(host_item *, uschar *, int, uschar **, BOOL);
 143 extern int     host_find_bydns(host_item *, uschar *, int, uschar *, uschar *,
 144                  uschar *,uschar **, BOOL *);
 145 extern ip_address_item *host_find_interfaces(void);
 146 extern BOOL    host_is_in_net(uschar *, uschar *, int);
 147 extern BOOL    host_is_tls_on_connect_port(int);
 148 extern int     host_item_get_port(host_item *);
 149 extern void    host_mask(int, int *, int);
 150 extern int     host_name_lookup(void);
 151 extern int     host_nmtoa(int, int *, int, uschar *, int);
 152 extern uschar *host_ntoa(int, const void *, uschar *, int *);
 153 extern int     host_scan_for_local_hosts(host_item *, host_item **, BOOL *);
 154
 155 extern void    invert_address(uschar *, uschar *);
 156 extern int     ip_bind(int, int, uschar *, int);
 157 extern int     ip_connect(int, int, uschar *, int, int);
 158 extern int     ip_get_address_family(int);
 159 extern void    ip_keepalive(int, uschar *, BOOL);
 160 extern int     ip_recv(int, uschar *, int, int);
 161 extern int     ip_socket(int, int);
 162
 163 extern uschar *local_part_quote(uschar *);
 164 extern int     log_create_as_exim(uschar *);
 165 extern void    log_close_all(void);
 166
 167 #ifdef WITH_CONTENT_SCAN
 168 extern int     malware(uschar **);
 169 extern int     malware_in_file(uschar *);
 170 #endif
 171 extern int     match_address_list(uschar *, BOOL, BOOL, uschar **,
 172                  unsigned int *, int, int, uschar **);
 173 extern int     match_check_list(uschar **, int, tree_node **, unsigned int **,
 174                  int(*)(void *, uschar *, uschar **, uschar **), void *, int,
 175                  uschar *, uschar **);
 176 extern int     match_isinlist(uschar *, uschar **, int, tree_node **,
 177                  unsigned int *, int, BOOL, uschar **);
 178 extern int     match_check_string(uschar *, uschar *, int, BOOL, BOOL, BOOL,
 179                  uschar **);
 180 extern void    md5_end(md5 *, const uschar *, int, uschar *);
 181 extern void    md5_mid(md5 *, const uschar *);
 182 extern void    md5_start(md5 *);
 183 extern void    millisleep(int);
 184 #ifdef WITH_CONTENT_SCAN
 185 struct mime_boundary_context;
 186 extern int     mime_acl_check(uschar *acl, FILE *f,
 187                  struct mime_boundary_context *, uschar **, uschar **);
 188 extern int     mime_decode(uschar **);
 189 extern int     mime_regex(uschar **);
 190 #endif
 191 extern uschar *moan_check_errorcopy(uschar *);
 192 extern BOOL    moan_skipped_syntax_errors(uschar *, error_block *, uschar *,
 193                  BOOL, uschar *);
 194 extern void    moan_smtp_batch(uschar *, const char *, ...) PRINTF_FUNCTION(2,3);
 195 extern void    moan_tell_someone(uschar *, address_item *,
 196                  const uschar *, const char *, ...) PRINTF_FUNCTION(4,5);
 197 extern BOOL    moan_to_sender(int, error_block *, header_line *, FILE *, BOOL);
 198 extern void    moan_write_from(FILE *);
 199 extern FILE   *modefopen(const uschar *, const char *, mode_t);
 200
 201 extern uschar *parse_extract_address(uschar *, uschar **, int *, int *, int *,
 202                  BOOL);
 203 extern int     parse_forward_list(uschar *, int, address_item **, uschar **,
 204                  uschar *, uschar *, error_block **);
 205 extern uschar *parse_find_address_end(uschar *, BOOL);
 206 extern uschar *parse_find_at(uschar *);
 207 extern uschar *parse_fix_phrase(uschar *, int, uschar *, int);
 208 extern uschar *parse_message_id(uschar *, uschar **, uschar **);
 209 extern uschar *parse_quote_2047(uschar *, int, uschar *, uschar *, int, BOOL);
 210 extern uschar *parse_date_time(uschar *str, time_t *t);
 211 extern int     vaguely_random_number(int);
 212 #ifdef SUPPORT_TLS
 213 extern int     vaguely_random_number_fallback(int);
 214 #endif
 215
 216 extern BOOL    queue_action(uschar *, int, uschar **, int, int);
 217 extern void    queue_check_only(void);
 218 extern void    queue_list(int, uschar **, int);
 219 extern void    queue_count(void);
 220 extern void    queue_run(uschar *, uschar *, BOOL);
 221
 222 extern int     random_number(int);
 223 #ifdef WITH_CONTENT_SCAN
 224 extern int     recv_line(int, uschar *, int);
 225 #endif
 226 extern int     rda_interpret(redirect_block *, int, uschar *, uschar *,
 227                  uschar *, uschar *, uschar *, ugid_block *, address_item **,
 228                  uschar **, error_block **, int *, uschar *);
 229 extern int     rda_is_filter(const uschar *);
 230 extern BOOL    readconf_depends(driver_instance *, uschar *);
 231 extern void    readconf_driver_init(uschar *, driver_instance **,
 232                  driver_info *, int, void *, int, optionlist *, int);
 233 extern uschar *readconf_find_option(void *);
 234 extern void    readconf_main(void);
 235 extern void    readconf_print(uschar *, uschar *, BOOL);
 236 extern uschar *readconf_printtime(int);
 237 extern uschar *readconf_readname(uschar *, int, uschar *);
 238 extern int     readconf_readtime(uschar *, int, BOOL);
 239 extern void    readconf_rest(BOOL);
 240 extern uschar *readconf_retry_error(uschar *, uschar *, int *, int *);
 241 extern void    read_message_body(BOOL);
 242 extern void    receive_bomb_out(uschar *, uschar *);
 243 extern BOOL    receive_check_fs(int);
 244 extern BOOL    receive_check_set_sender(uschar *);
 245 extern BOOL    receive_msg(BOOL);
 246 extern int     receive_statvfs(BOOL, int *);
 247 extern void    receive_swallow_smtp(void);
 248 #ifdef WITH_CONTENT_SCAN
 249 extern int     regex(uschar **);
 250 #endif
 251 extern BOOL    regex_match_and_setup(const pcre *, uschar *, int, int);
 252 extern const pcre *regex_must_compile(uschar *, BOOL, BOOL);
 253 extern void    retry_add_item(address_item *, uschar *, int);
 254 extern BOOL    retry_check_address(uschar *, host_item *, uschar *, BOOL,
 255                  uschar **, uschar **);
 256 extern retry_config *retry_find_config(uschar *, uschar *, int, int);
 257 extern void    retry_update(address_item **, address_item **, address_item **);
 258 extern uschar *rewrite_address(uschar *, BOOL, BOOL, rewrite_rule *, int);
 259 extern uschar *rewrite_address_qualify(uschar *, BOOL);
 260 extern header_line *rewrite_header(header_line *, uschar *, uschar *,
 261                rewrite_rule *, int, BOOL);
 262 extern uschar *rewrite_one(uschar *, int, BOOL *, BOOL, uschar *,
 263                  rewrite_rule *);
 264 extern void    rewrite_test(uschar *);
 265 extern uschar *rfc2047_decode2(uschar *, BOOL, uschar *, int, int *, int *,
 266                  uschar **);
 267 extern int     route_address(address_item *, address_item **, address_item **,
 268                  address_item **, address_item **, int);
 269 extern int     route_check_prefix(uschar *, uschar *);
 270 extern int     route_check_suffix(uschar *, uschar *);
 271 extern BOOL    route_findgroup(uschar *, gid_t *);
 272 extern BOOL    route_finduser(uschar *, struct passwd **, uid_t *);
 273 extern BOOL    route_find_expanded_group(uschar *, uschar *, uschar *, gid_t *,
 274                  uschar **);
 275 extern BOOL    route_find_expanded_user(uschar *, uschar *, uschar *,
 276                  struct passwd **, uid_t *, uschar **);
 277 extern void    route_init(void);
 278 extern void    route_tidyup(void);
 279
 280 extern uschar *search_find(void *, uschar *, uschar *, int, uschar *, int,
 281                  int, int *);
 282 extern int     search_findtype(uschar *, int);
 283 extern int     search_findtype_partial(uschar *, int *, uschar **, int *,
 284                  int *);
 285 extern void   *search_open(uschar *, int, int, uid_t *, gid_t *);
 286 extern void    search_tidyup(void);
 287 extern void    set_process_info(const char *, ...) PRINTF_FUNCTION(1,2);
 288 extern void    sha1_end(sha1 *, const uschar *, int, uschar *);
 289 extern void    sha1_mid(sha1 *, const uschar *);
 290 extern void    sha1_start(sha1 *);
 291 extern int     sieve_interpret(uschar *, int, uschar *, uschar *, uschar *,
 292                  uschar *, address_item **, uschar **);
 293 extern void    sigalrm_handler(int);
 294 extern BOOL    smtp_buffered(void);
 295 extern void    smtp_closedown(uschar *);
 296 extern int     smtp_connect(host_item *, int, int, uschar *, int, BOOL, const uschar *);
 297 extern int     smtp_feof(void);
 298 extern int     smtp_ferror(void);
 299 extern uschar *smtp_get_connection_info(void);
 300 extern BOOL    smtp_get_interface(uschar *, int, address_item *, BOOL *,
 301                  uschar **, uschar *);
 302 extern BOOL    smtp_get_port(uschar *, address_item *, int *, uschar *);
 303 extern int     smtp_getc(void);
 304 extern int     smtp_handle_acl_fail(int, int, uschar *, uschar *);
 305 extern void    smtp_log_no_mail(void);
 306 extern void    smtp_message_code(uschar **, int *, uschar **, uschar **);
 307 extern BOOL    smtp_read_response(smtp_inblock *, uschar *, int, int, int);
 308 extern void    smtp_respond(uschar *, int, BOOL, uschar *);
 309 extern void    smtp_notquit_exit(uschar *, uschar *, uschar *, ...);
 310 extern void    smtp_send_prohibition_message(int, uschar *);
 311 extern int     smtp_setup_msg(void);
 312 extern BOOL    smtp_start_session(void);
 313 extern int     smtp_ungetc(int);
 314 extern BOOL    smtp_verify_helo(void);
 315 extern int     smtp_write_command(smtp_outblock *, BOOL, const char *, ...) PRINTF_FUNCTION(3,4);
 316 #ifdef WITH_CONTENT_SCAN
 317 extern int     spam(uschar **);
 318 extern FILE   *spool_mbox(unsigned long *, uschar *);
 319 #endif
 320 extern BOOL    spool_move_message(uschar *, uschar *, uschar *, uschar *);
 321 extern BOOL    spool_open_datafile(uschar *);
 322 extern int     spool_open_temp(uschar *);
 323 extern int     spool_read_header(uschar *, BOOL, BOOL);
 324 extern int     spool_write_header(uschar *, int, uschar **);
 325 extern int     stdin_getc(void);
 326 extern int     stdin_feof(void);
 327 extern int     stdin_ferror(void);
 328 extern int     stdin_ungetc(int);
 329 extern uschar *string_append(uschar *, int *, int *, int, ...);
 330 extern uschar *string_base62(unsigned long int);
 331 extern uschar *string_cat(uschar *, int *, int *, const uschar *, int);
 332 extern uschar *string_copy_dnsdomain(uschar *);
 333 extern uschar *string_copy_malloc(uschar *);
 334 extern uschar *string_copylc(uschar *);
 335 extern uschar *string_copynlc(uschar *, int);
 336 extern uschar *string_dequote(uschar **);
 337 extern BOOL    string_format(uschar *, int, const char *, ...) ALMOST_PRINTF(3,4);
 338 extern uschar *string_format_size(int, uschar *);
 339 extern int     string_interpret_escape(uschar **);
 340 extern int     string_is_ip_address(uschar *, int *);
 341 extern uschar *string_log_address(address_item *, BOOL, BOOL);
 342 extern uschar *string_nextinlist(uschar **, int *, uschar *, int);
 343 extern uschar *string_open_failed(int, const char *, ...) PRINTF_FUNCTION(2,3);
 344 extern uschar *string_printing2(uschar *, BOOL);
 345 extern uschar *string_split_message(uschar *);
 346 extern uschar *string_unprinting(uschar *);
 347 extern BOOL    string_vformat(uschar *, int, const char *, va_list);
 348 extern int     strcmpic(const uschar *, const uschar *);
 349 extern int     strncmpic(const uschar *, const uschar *, int);
 350 extern uschar *strstric(uschar *, uschar *, BOOL);
 351
 352 extern uschar *tod_stamp(int);
 353 extern BOOL    transport_check_waiting(uschar *, uschar *, int, uschar *,
 354                  BOOL *);
 355 extern void    transport_init(void);
 356 extern BOOL    transport_pass_socket(uschar *, uschar *, uschar *, uschar *,
 357                  int);
 358 extern uschar *transport_rcpt_address(address_item *, BOOL);
 359 extern BOOL    transport_set_up_command(uschar ***, uschar *, BOOL, int,
 360                  address_item *, uschar *, uschar **);
 361 extern void    transport_update_waiting(host_item *, uschar *);
 362 extern BOOL    transport_write_block(int, uschar *, int);
 363 extern BOOL    transport_write_string(int, const char *, ...);
 364 extern BOOL    transport_write_message(address_item *, int, int, int, uschar *,
 365                  uschar *, uschar *, uschar *, rewrite_rule *, int);
 366 extern void    tree_add_duplicate(uschar *, address_item *);
 367 extern void    tree_add_nonrecipient(uschar *);
 368 extern void    tree_add_unusable(host_item *);
 369 extern int     tree_insertnode(tree_node **, tree_node *);
 370 extern tree_node *tree_search(tree_node *, uschar *);
 371 extern void    tree_write(tree_node *, FILE *);
 372 extern void    tree_walk(tree_node *, void (*)(uschar*, uschar*, void*), void *);
 373
 374 #ifdef WITH_CONTENT_SCAN
 375 extern void    unspool_mbox(void);
 376 #endif
 377
 378 extern int     verify_address(address_item *, FILE *, int, int, int, int,
 379                  uschar *, uschar *, BOOL *);
 380 extern int     verify_check_dnsbl(uschar **);
 381 extern int     verify_check_header_address(uschar **, uschar **, int, int, int,
 382                  uschar *, uschar *, int, int *);
 383 extern int     verify_check_headers(uschar **);
 384 extern int     verify_check_host(uschar **);
 385 extern int     verify_check_notblind(void);
 386 extern int     verify_check_this_host(uschar **, unsigned int *, uschar*,
 387                  uschar *, uschar **);
 388 extern address_item *verify_checked_sender(uschar *);
 389 extern void    verify_get_ident(int);
 390 extern BOOL    verify_sender(int *, uschar **);
 391 extern BOOL    verify_sender_preliminary(int *, uschar **);
 392 extern void    version_init(void);
 393
 394 extern ssize_t write_to_fd_buf(int, const uschar *, size_t);
 395
 396 /* End of functions.h */