src/src/functions.h

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2016 */
   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
  29 extern uschar * tls_cert_crl_uri(void *, uschar * mod);
  30 extern uschar * tls_cert_ext_by_oid(void *, uschar *, int);
  31 extern uschar * tls_cert_issuer(void *, uschar * mod);
  32 extern uschar * tls_cert_not_before(void *, uschar * mod);
  33 extern uschar * tls_cert_not_after(void *, uschar * mod);
  34 extern uschar * tls_cert_ocsp_uri(void *, uschar * mod);
  35 extern uschar * tls_cert_serial_number(void *, uschar * mod);
  36 extern uschar * tls_cert_signature(void *, uschar * mod);
  37 extern uschar * tls_cert_signature_algorithm(void *, uschar * mod);
  38 extern uschar * tls_cert_subject(void *, uschar * mod);
  39 extern uschar * tls_cert_subject_altname(void *, uschar * mod);
  40 extern uschar * tls_cert_version(void *, uschar * mod);
  41
  42 extern uschar * tls_cert_der_b64(void * cert);
  43 extern uschar * tls_cert_fprt_md5(void *);
  44 extern uschar * tls_cert_fprt_sha1(void *);
  45 extern uschar * tls_cert_fprt_sha256(void *);
  46
  47 extern int     tls_client_start(int, host_item *, address_item *,
  48                  transport_instance *
  49 # ifdef EXPERIMENTAL_DANE
  50                 , dns_answer *
  51 # endif
  52                                 );
  53 extern void    tls_close(BOOL, BOOL);
  54 extern int     tls_export_cert(uschar *, size_t, void *);
  55 extern int     tls_feof(void);
  56 extern int     tls_ferror(void);
  57 extern void    tls_free_cert(void **);
  58 extern int     tls_getc(void);
  59 extern int     tls_import_cert(const uschar *, void **);
  60 extern int     tls_read(BOOL, uschar *, size_t);
  61 extern int     tls_server_start(const uschar *);
  62 extern BOOL    tls_smtp_buffered(void);
  63 extern int     tls_ungetc(int);
  64 extern int     tls_write(BOOL, const uschar *, size_t);
  65 extern uschar *tls_validate_require_cipher(void);
  66 extern void    tls_version_report(FILE *);
  67 # ifndef USE_GNUTLS
  68 extern BOOL    tls_openssl_options_parse(uschar *, long *);
  69 # endif
  70 extern uschar * tls_field_from_dn(uschar *, const uschar *);
  71 extern BOOL    tls_is_name_for_cert(const uschar *, void *);
  72
  73 # ifdef EXPERIMENTAL_DANE
  74 extern int     tlsa_lookup(const host_item *, dns_answer *, BOOL);
  75 # endif
  76
  77 #endif  /*SUPPORT_TLS*/
  78
  79
  80 /* Everything else... */
  81
  82 extern acl_block *acl_read(uschar *(*)(void), uschar **);
  83 extern int     acl_check(int, uschar *, uschar *, uschar **, uschar **);
  84 extern int     acl_eval(int, uschar *, uschar **, uschar **);
  85
  86 extern tree_node *acl_var_create(uschar *);
  87 extern void    acl_var_write(uschar *, uschar *, void *);
  88 extern int     auth_call_pam(const uschar *, uschar **);
  89 extern int     auth_call_pwcheck(uschar *, uschar **);
  90 extern int     auth_call_radius(const uschar *, uschar **);
  91 extern int     auth_call_saslauthd(const uschar *, const uschar *,
  92                  const uschar *, const uschar *, uschar **);
  93 extern int     auth_check_serv_cond(auth_instance *);
  94 extern int     auth_check_some_cond(auth_instance *, uschar *, uschar *, int);
  95
  96 extern int     auth_get_data(uschar **, uschar *, int);
  97 extern int     auth_get_no64_data(uschar **, uschar *);
  98 extern uschar *auth_xtextencode(uschar *, int);
  99 extern int     auth_xtextdecode(uschar *, uschar **);
 100
 101 extern uschar *b64encode(uschar *, int);
 102 extern int     b64decode(uschar *, uschar **);
 103 extern void    bits_clear(unsigned int *, size_t, int *);
 104 extern void    bits_set(unsigned int *, size_t, int *);
 105
 106 extern void    cancel_cutthrough_connection(const char *);
 107 extern int     check_host(void *, const uschar *, const uschar **, uschar **);
 108 extern uschar **child_exec_exim(int, BOOL, int *, BOOL, int, ...);
 109 extern pid_t   child_open_uid(const uschar **, const uschar **, int,
 110                  uid_t *, gid_t *, int *, int *, uschar *, BOOL);
 111 extern BOOL    cleanup_environment(void);
 112 extern uschar *cutthrough_finaldot(void);
 113 extern BOOL    cutthrough_flush_send(void);
 114 extern BOOL    cutthrough_headers_send(void);
 115 extern BOOL    cutthrough_predata(void);
 116 extern BOOL    cutthrough_puts(uschar *, int);
 117 extern BOOL    cutthrough_put_nl(void);
 118
 119 extern void    daemon_go(void);
 120
 121 #ifdef EXPERIMENTAL_DCC
 122 extern int     dcc_process(uschar **);
 123 #endif
 124
 125 extern void    debug_logging_activate(uschar *, uschar *);
 126 extern void    debug_logging_stop(void);
 127 extern void    debug_print_argv(const uschar **);
 128 extern void    debug_print_ids(uschar *);
 129 extern void    debug_print_string(uschar *);
 130 extern void    debug_print_tree(tree_node *);
 131 extern void    debug_vprintf(const char *, va_list);
 132 extern void    decode_bits(unsigned int *, size_t, int *,
 133                    uschar *, bit_table *, int, uschar *, int);
 134 extern address_item *deliver_make_addr(uschar *, BOOL);
 135 extern void    deliver_init(void);
 136 extern void    delivery_log(int, address_item *, int, uschar *);
 137 extern int     deliver_message(uschar *, BOOL, BOOL);
 138 extern void    deliver_msglog(const char *, ...) PRINTF_FUNCTION(1,2);
 139 extern void    deliver_set_expansions(address_item *);
 140 extern int     deliver_split_address(address_item *);
 141 extern void    deliver_succeeded(address_item *);
 142
 143 extern uschar *deliver_get_sender_address (uschar *id);
 144
 145 extern BOOL    directory_make(const uschar *, const uschar *, int, BOOL);
 146 #ifndef DISABLE_DKIM
 147 extern BOOL    dkim_transport_write_message(address_item *, int, int,
 148                    uschar *, uschar *, uschar *, uschar *, rewrite_rule *,
 149                    int, struct ob_dkim *);
 150 #endif
 151 extern dns_address *dns_address_from_rr(dns_answer *, dns_record *);
 152 extern int     dns_basic_lookup(dns_answer *, const uschar *, int);
 153 extern void    dns_build_reverse(const uschar *, uschar *);
 154 extern void    dns_init(BOOL, BOOL, BOOL);
 155 extern BOOL    dns_is_aa(const dns_answer *);
 156 extern BOOL    dns_is_secure(const dns_answer *);
 157 extern int     dns_lookup(dns_answer *, const uschar *, int, const uschar **);
 158 extern void    dns_pattern_init(void);
 159 extern int     dns_special_lookup(dns_answer *, const uschar *, int, const uschar **);
 160 extern dns_record *dns_next_rr(dns_answer *, dns_scan *, int);
 161 extern uschar *dns_text_type(int);
 162 extern void    dscp_list_to_stream(FILE *);
 163 extern BOOL    dscp_lookup(const uschar *, int, int *, int *, int *);
 164
 165 extern void    enq_end(uschar *);
 166 extern BOOL    enq_start(uschar *, unsigned);
 167 #ifndef DISABLE_EVENT
 168 extern uschar *event_raise(uschar *, const uschar *, uschar *);
 169 extern void    msg_event_raise(const uschar *, const address_item *);
 170 #endif
 171 extern uschar  ehlo_response(uschar *, size_t, uschar);
 172 extern const uschar * exim_errstr(int);
 173 extern void    exim_exit(int);
 174 extern void    exim_nullstd(void);
 175 extern void    exim_setugid(uid_t, gid_t, BOOL, uschar *);
 176 extern int     exim_tvcmp(struct timeval *, struct timeval *);
 177 extern void    exim_wait_tick(struct timeval *, int);
 178 extern int     exp_bool(address_item *addr,
 179   uschar *mtype, uschar *mname, unsigned dgb_opt, uschar *oname, BOOL bvalue,
 180   uschar *svalue, BOOL *rvalue);
 181 extern BOOL    expand_check_condition(uschar *, uschar *, uschar *);
 182 extern uschar *expand_string(uschar *); /* public, cannot make const */
 183 extern const uschar *expand_cstring(const uschar *); /* ... so use this one */
 184 extern uschar *expand_hide_passwords(uschar * );
 185 extern uschar *expand_string_copy(const uschar *);
 186 extern int_eximarith_t expand_string_integer(uschar *, BOOL);
 187 extern void    modify_variable(uschar *, void *);
 188
 189 extern BOOL    fd_ready(int, int);
 190
 191 extern int     filter_interpret(uschar *, int, address_item **, uschar **);
 192 extern BOOL    filter_personal(string_item *, BOOL);
 193 extern BOOL    filter_runtest(int, uschar *, BOOL, BOOL);
 194 extern BOOL    filter_system_interpret(address_item **, uschar **);
 195
 196 extern uschar * fn_hdrs_added(void);
 197
 198 extern void    header_add(int, const char *, ...);
 199 extern int     header_checkname(header_line *, BOOL);
 200 extern BOOL    header_match(uschar *, BOOL, BOOL, string_item *, int, ...);
 201 extern int     host_address_extract_port(uschar *);
 202 extern uschar *host_and_ident(BOOL);
 203 extern int     host_aton(const uschar *, int *);
 204 extern void    host_build_hostlist(host_item **, const uschar *, BOOL);
 205 extern ip_address_item *host_build_ifacelist(const uschar *, uschar *);
 206 extern void    host_build_log_info(void);
 207 extern void    host_build_sender_fullhost(void);
 208 extern BOOL    host_find_byname(host_item *, const uschar *, int,
 209                                 const uschar **, BOOL);
 210 extern int     host_find_bydns(host_item *, const uschar *, int, uschar *, uschar *,
 211                  uschar *, const dnssec_domains *, const uschar **, BOOL *);
 212 extern ip_address_item *host_find_interfaces(void);
 213 extern BOOL    host_is_in_net(const uschar *, const uschar *, int);
 214 extern BOOL    host_is_tls_on_connect_port(int);
 215 extern int     host_item_get_port(host_item *);
 216 extern void    host_mask(int, int *, int);
 217 extern int     host_name_lookup(void);
 218 extern int     host_nmtoa(int, int *, int, uschar *, int);
 219 extern uschar *host_ntoa(int, const void *, uschar *, int *);
 220 extern int     host_scan_for_local_hosts(host_item *, host_item **, BOOL *);
 221
 222 extern uschar *imap_utf7_encode(uschar *, const uschar *,
 223                                  uschar, uschar *, uschar **);
 224
 225 extern void    invert_address(uschar *, uschar *);
 226 extern int     ip_addr(void *, int, const uschar *, int);
 227 extern int     ip_bind(int, int, uschar *, int);
 228 extern int     ip_connect(int, int, const uschar *, int, int);
 229 extern int     ip_connectedsocket(int, const uschar *, int, int,
 230                  int, host_item *, uschar **);
 231 extern int     ip_get_address_family(int);
 232 extern void    ip_keepalive(int, const uschar *, BOOL);
 233 extern int     ip_recv(int, uschar *, int, int);
 234 extern int     ip_socket(int, int);
 235
 236 extern int     ip_tcpsocket(const uschar *, uschar **, int);
 237 extern int     ip_unixsocket(const uschar *, uschar **);
 238 extern int     ip_streamsocket(const uschar *, uschar **, int);
 239
 240 extern int     ipv6_nmtoa(int *, uschar *);
 241
 242 extern uschar *local_part_quote(uschar *);
 243 extern int     log_create(uschar *);
 244 extern int     log_create_as_exim(uschar *);
 245 extern void    log_close_all(void);
 246
 247 #ifdef WITH_CONTENT_SCAN
 248 extern int     malware(const uschar *, int);
 249 extern int     malware_in_file(uschar *);
 250 extern void    malware_init(void);
 251 #endif
 252 extern int     match_address_list(const uschar *, BOOL, BOOL, const uschar **,
 253                  unsigned int *, int, int, const uschar **);
 254 extern int     match_check_list(const uschar **, int, tree_node **, unsigned int **,
 255                  int(*)(void *, const uschar *, const uschar **, uschar **), void *, int,
 256                  const uschar *, const uschar **);
 257 extern int     match_isinlist(const uschar *, const uschar **, int, tree_node **,
 258                  unsigned int *, int, BOOL, const uschar **);
 259 extern int     match_check_string(const uschar *, const uschar *, int, BOOL, BOOL, BOOL,
 260                  const uschar **);
 261 extern void    md5_end(md5 *, const uschar *, int, uschar *);
 262 extern void    md5_mid(md5 *, const uschar *);
 263 extern void    md5_start(md5 *);
 264 extern void    millisleep(int);
 265 #ifdef WITH_CONTENT_SCAN
 266 struct mime_boundary_context;
 267 extern int     mime_acl_check(uschar *acl, FILE *f,
 268                  struct mime_boundary_context *, uschar **, uschar **);
 269 extern int     mime_decode(const uschar **);
 270 extern ssize_t mime_decode_base64(FILE *, FILE *, uschar *);
 271 extern int     mime_regex(const uschar **);
 272 extern void    mime_set_anomaly(int);
 273 #endif
 274 extern uschar *moan_check_errorcopy(uschar *);
 275 extern BOOL    moan_skipped_syntax_errors(uschar *, error_block *, uschar *,
 276                  BOOL, uschar *);
 277 extern void    moan_smtp_batch(uschar *, const char *, ...) PRINTF_FUNCTION(2,3);
 278 extern void    moan_tell_someone(uschar *, address_item *,
 279                  const uschar *, const char *, ...) PRINTF_FUNCTION(4,5);
 280 extern BOOL    moan_to_sender(int, error_block *, header_line *, FILE *, BOOL);
 281 extern void    moan_write_from(FILE *);
 282 extern FILE   *modefopen(const uschar *, const char *, mode_t);
 283
 284 extern int     open_cutthrough_connection( address_item * addr );
 285
 286 extern uschar *parse_extract_address(uschar *, uschar **, int *, int *, int *,
 287                  BOOL);
 288 extern int     parse_forward_list(uschar *, int, address_item **, uschar **,
 289                  const uschar *, uschar *, error_block **);
 290 extern uschar *parse_find_address_end(uschar *, BOOL);
 291 extern uschar *parse_find_at(uschar *);
 292 extern const uschar *parse_fix_phrase(const uschar *, int, uschar *, int);
 293 extern uschar *parse_message_id(uschar *, uschar **, uschar **);
 294 extern const uschar *parse_quote_2047(const uschar *, int, uschar *, uschar *, int, BOOL);
 295 extern uschar *parse_date_time(uschar *str, time_t *t);
 296 extern int     vaguely_random_number(int);
 297 #ifdef SUPPORT_TLS
 298 extern int     vaguely_random_number_fallback(int);
 299 #endif
 300
 301 extern BOOL    queue_action(uschar *, int, uschar **, int, int);
 302 extern void    queue_check_only(void);
 303 extern void    queue_list(int, uschar **, int);
 304 extern void    queue_count(void);
 305 extern void    queue_run(uschar *, uschar *, BOOL);
 306
 307 extern int     random_number(int);
 308 extern int     rda_interpret(redirect_block *, int, uschar *, uschar *,
 309                  uschar *, uschar *, uschar *, ugid_block *, address_item **,
 310                  uschar **, error_block **, int *, uschar *);
 311 extern int     rda_is_filter(const uschar *);
 312 extern BOOL    readconf_depends(driver_instance *, uschar *);
 313 extern void    readconf_driver_init(uschar *, driver_instance **,
 314                  driver_info *, int, void *, int, optionlist *, int);
 315 extern uschar *readconf_find_option(void *);
 316 extern void    readconf_main(BOOL);
 317 extern void    readconf_print(uschar *, uschar *, BOOL no_labels);
 318 extern uschar *readconf_printtime(int);
 319 extern uschar *readconf_readname(uschar *, int, uschar *);
 320 extern int     readconf_readtime(const uschar *, int, BOOL);
 321 extern void    readconf_rest(void);
 322 extern uschar *readconf_retry_error(const uschar *, const uschar *, int *, int *);
 323 extern void    readconf_save_config(const uschar *);
 324 extern void    read_message_body(BOOL);
 325 extern void    receive_bomb_out(uschar *, uschar *);
 326 extern BOOL    receive_check_fs(int);
 327 extern BOOL    receive_check_set_sender(uschar *);
 328 extern BOOL    receive_msg(BOOL);
 329 extern int     receive_statvfs(BOOL, int *);
 330 extern void    receive_swallow_smtp(void);
 331 #ifdef WITH_CONTENT_SCAN
 332 extern int     regex(const uschar **);
 333 #endif
 334 extern BOOL    regex_match_and_setup(const pcre *, const uschar *, int, int);
 335 extern const pcre *regex_must_compile(const uschar *, BOOL, BOOL);
 336 extern void    retry_add_item(address_item *, uschar *, int);
 337 extern BOOL    retry_check_address(const uschar *, host_item *, uschar *, BOOL,
 338                  uschar **, uschar **);
 339 extern retry_config *retry_find_config(const uschar *, const uschar *, int, int);
 340 extern BOOL    retry_ultimate_address_timeout(uschar *, const uschar *,
 341                  dbdata_retry *, time_t);
 342 extern void    retry_update(address_item **, address_item **, address_item **);
 343 extern uschar *rewrite_address(uschar *, BOOL, BOOL, rewrite_rule *, int);
 344 extern uschar *rewrite_address_qualify(uschar *, BOOL);
 345 extern header_line *rewrite_header(header_line *,
 346                const uschar *, const uschar *,
 347                rewrite_rule *, int, BOOL);
 348 extern uschar *rewrite_one(uschar *, int, BOOL *, BOOL, uschar *,
 349                  rewrite_rule *);
 350 extern void    rewrite_test(uschar *);
 351 extern uschar *rfc2047_decode2(uschar *, BOOL, uschar *, int, int *, int *,
 352                  uschar **);
 353 extern int     route_address(address_item *, address_item **, address_item **,
 354                  address_item **, address_item **, int);
 355 extern int     route_check_prefix(const uschar *, const uschar *);
 356 extern int     route_check_suffix(const uschar *, const uschar *);
 357 extern BOOL    route_findgroup(uschar *, gid_t *);
 358 extern BOOL    route_finduser(const uschar *, struct passwd **, uid_t *);
 359 extern BOOL    route_find_expanded_group(uschar *, uschar *, uschar *, gid_t *,
 360                  uschar **);
 361 extern BOOL    route_find_expanded_user(uschar *, uschar *, uschar *,
 362                  struct passwd **, uid_t *, uschar **);
 363 extern void    route_init(void);
 364 extern void    route_tidyup(void);
 365
 366 extern uschar *search_find(void *, uschar *, uschar *, int, const uschar *, int,
 367                  int, int *);
 368 extern int     search_findtype(const uschar *, int);
 369 extern int     search_findtype_partial(const uschar *, int *, const uschar **, int *,
 370                  int *);
 371 extern void   *search_open(uschar *, int, int, uid_t *, gid_t *);
 372 extern void    search_tidyup(void);
 373 extern void    set_process_info(const char *, ...) PRINTF_FUNCTION(1,2);
 374 extern void    sha1_end(hctx *, const uschar *, int, uschar *);
 375 extern void    sha1_mid(hctx *, const uschar *);
 376 extern void    sha1_start(hctx *);
 377 extern int     sieve_interpret(uschar *, int, uschar *, uschar *, uschar *,
 378                  uschar *, address_item **, uschar **);
 379 extern void    sigalrm_handler(int);
 380 extern BOOL    smtp_buffered(void);
 381 extern void    smtp_closedown(uschar *);
 382 extern int     smtp_connect(host_item *, int, int, uschar *, int,
 383                  transport_instance *);
 384 extern int     smtp_sock_connect(host_item *, int, int, uschar *,
 385                  transport_instance * tb, int);
 386 extern int     smtp_feof(void);
 387 extern int     smtp_ferror(void);
 388 extern uschar *smtp_get_connection_info(void);
 389 extern BOOL    smtp_get_interface(uschar *, int, address_item *,
 390                  uschar **, uschar *);
 391 extern BOOL    smtp_get_port(uschar *, address_item *, int *, uschar *);
 392 extern int     smtp_getc(void);
 393 extern int     smtp_handle_acl_fail(int, int, uschar *, uschar *);
 394 extern void    smtp_log_no_mail(void);
 395 extern void    smtp_message_code(uschar **, int *, uschar **, uschar **, BOOL);
 396 extern BOOL    smtp_read_response(smtp_inblock *, uschar *, int, int, int);
 397 extern void    smtp_respond(uschar *, int, BOOL, uschar *);
 398 extern void    smtp_notquit_exit(uschar *, uschar *, uschar *, ...);
 399 extern void    smtp_send_prohibition_message(int, uschar *);
 400 extern int     smtp_setup_msg(void);
 401 extern BOOL    smtp_start_session(void);
 402 extern int     smtp_ungetc(int);
 403 extern BOOL    smtp_verify_helo(void);
 404 extern int     smtp_write_command(smtp_outblock *, BOOL, const char *, ...) PRINTF_FUNCTION(3,4);
 405 #ifdef WITH_CONTENT_SCAN
 406 extern int     spam(const uschar **);
 407 extern FILE   *spool_mbox(unsigned long *, const uschar *);
 408 #endif
 409 extern BOOL    spool_move_message(uschar *, uschar *, uschar *, uschar *);
 410 extern uschar *spool_fname(const uschar *, uschar *, uschar *, uschar *);
 411 extern uschar *spool_sname(const uschar *, uschar *);
 412 extern int     spool_open_datafile(uschar *);
 413 extern int     spool_open_temp(uschar *);
 414 extern int     spool_read_header(uschar *, BOOL, BOOL);
 415 extern int     spool_write_header(uschar *, int, uschar **);
 416 extern int     stdin_getc(void);
 417 extern int     stdin_feof(void);
 418 extern int     stdin_ferror(void);
 419 extern int     stdin_ungetc(int);
 420 extern uschar *string_append(uschar *, int *, int *, int, ...);
 421 extern uschar *string_append_listele(uschar *, uschar, const uschar *);
 422 extern uschar *string_append_listele_n(uschar *, uschar, const uschar *, unsigned);
 423 extern uschar *string_base62(unsigned long int);
 424 extern uschar *string_cat(uschar *, int *, int *, const uschar *);
 425 extern uschar *string_catn(uschar *, int *, int *, const uschar *, int);
 426 extern int     string_compare_by_pointer(const void *, const void *);
 427 extern uschar *string_copy_dnsdomain(uschar *);
 428 extern uschar *string_copy_malloc(const uschar *);
 429 extern uschar *string_copylc(const uschar *);
 430 extern uschar *string_copynlc(uschar *, int);
 431 extern uschar *string_dequote(const uschar **);
 432 extern BOOL    string_format(uschar *, int, const char *, ...) ALMOST_PRINTF(3,4);
 433 extern uschar *string_format_size(int, uschar *);
 434 extern int     string_interpret_escape(const uschar **);
 435 extern int     string_is_ip_address(const uschar *, int *);
 436 #ifdef SUPPORT_I18N
 437 extern BOOL    string_is_utf8(const uschar *);
 438 #endif
 439 extern uschar *string_log_address(address_item *, BOOL, BOOL);
 440 extern uschar *string_nextinlist(const uschar **, int *, uschar *, int);
 441 extern uschar *string_open_failed(int, const char *, ...) PRINTF_FUNCTION(2,3);
 442 extern const uschar *string_printing2(const uschar *, BOOL);
 443 extern uschar *string_split_message(uschar *);
 444 extern uschar *string_unprinting(uschar *);
 445 #ifdef SUPPORT_I18N
 446 extern uschar *string_address_utf8_to_alabel(const uschar *, uschar **);
 447 extern uschar *string_domain_alabel_to_utf8(const uschar *, uschar **);
 448 extern uschar *string_domain_utf8_to_alabel(const uschar *, uschar **);
 449 extern uschar *string_localpart_alabel_to_utf8(const uschar *, uschar **);
 450 extern uschar *string_localpart_utf8_to_alabel(const uschar *, uschar **);
 451 #endif
 452 extern BOOL    string_vformat(uschar *, int, const char *, va_list);
 453 extern int     strcmpic(const uschar *, const uschar *);
 454 extern int     strncmpic(const uschar *, const uschar *, int);
 455 extern uschar *strstric(uschar *, uschar *, BOOL);
 456
 457 extern uschar *tod_stamp(int);
 458
 459 extern void    tls_modify_variables(tls_support *);
 460 extern BOOL    transport_check_waiting(const uschar *, const uschar *, int, uschar *,
 461                  BOOL *, oicf, void*);
 462 extern void    transport_init(void);
 463 extern BOOL    transport_pass_socket(const uschar *, const uschar *, const uschar *, uschar *,
 464                  int);
 465 extern uschar *transport_rcpt_address(address_item *, BOOL);
 466 extern BOOL    transport_set_up_command(const uschar ***, uschar *,
 467                  BOOL, int, address_item *, uschar *, uschar **);
 468 extern void    transport_update_waiting(host_item *, uschar *);
 469 extern BOOL    transport_write_block(int, uschar *, int);
 470 extern BOOL    transport_write_string(int, const char *, ...);
 471 extern BOOL    transport_headers_send(address_item *, int, uschar *, uschar *,
 472                  BOOL (*)(int, uschar *, int, BOOL), BOOL, rewrite_rule *, int);
 473 extern BOOL    transport_write_message(address_item *, int, int, int, uschar *,
 474                  uschar *, uschar *, uschar *, rewrite_rule *, int);
 475 extern void    tree_add_duplicate(uschar *, address_item *);
 476 extern void    tree_add_nonrecipient(uschar *);
 477 extern void    tree_add_unusable(host_item *);
 478 extern int     tree_insertnode(tree_node **, tree_node *);
 479 extern tree_node *tree_search(tree_node *, const uschar *);
 480 extern void    tree_write(tree_node *, FILE *);
 481 extern void    tree_walk(tree_node *, void (*)(uschar*, uschar*, void*), void *);
 482
 483 #ifdef WITH_CONTENT_SCAN
 484 extern void    unspool_mbox(void);
 485 #endif
 486 #ifdef SUPPORT_I18N
 487 extern void    utf8_version_report(FILE *);
 488 #endif
 489
 490 extern int     verify_address(address_item *, FILE *, int, int, int, int,
 491                  uschar *, uschar *, BOOL *);
 492 extern int     verify_check_dnsbl(int, const uschar **, uschar **);
 493 extern int     verify_check_header_address(uschar **, uschar **, int, int, int,
 494                  uschar *, uschar *, int, int *);
 495 extern int     verify_check_headers(uschar **);
 496 extern int     verify_check_header_names_ascii(uschar **);
 497 extern int     verify_check_host(uschar **);
 498 extern int     verify_check_notblind(void);
 499 extern int     verify_check_given_host(uschar **, host_item *);
 500 extern int     verify_check_this_host(const uschar **, unsigned int *,
 501                  const uschar*, const uschar *, const uschar **);
 502 extern address_item *verify_checked_sender(uschar *);
 503 extern void    verify_get_ident(int);
 504 extern BOOL    verify_sender(int *, uschar **);
 505 extern BOOL    verify_sender_preliminary(int *, uschar **);
 506 extern void    version_init(void);
 507
 508 extern ssize_t write_to_fd_buf(int, const uschar *, size_t);
 509
 510 /* vi: aw
 511 */
 512 /* End of functions.h */