src/src/functions.h

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2014 */
   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_fprt_md5(void *);
  43 extern uschar * tls_cert_fprt_sha1(void *);
  44 extern uschar * tls_cert_fprt_sha256(void *);
  45
  46 extern int     tls_client_start(int, host_item *, address_item *,
  47                  transport_instance *
  48 #ifdef EXPERIMENTAL_DANE
  49                 , dns_answer *
  50 #endif
  51                                 );
  52 extern void    tls_close(BOOL, BOOL);
  53 extern int     tls_export_cert(uschar *, size_t, void *);
  54 extern int     tls_feof(void);
  55 extern int     tls_ferror(void);
  56 extern void    tls_free_cert(void *);
  57 extern int     tls_getc(void);
  58 extern int     tls_import_cert(const uschar *, void **);
  59 extern int     tls_read(BOOL, uschar *, size_t);
  60 extern int     tls_server_start(const uschar *);
  61 extern BOOL    tls_smtp_buffered(void);
  62 extern int     tls_ungetc(int);
  63 extern int     tls_write(BOOL, const uschar *, size_t);
  64 extern uschar *tls_validate_require_cipher(void);
  65 extern void    tls_version_report(FILE *);
  66 # ifndef USE_GNUTLS
  67 extern BOOL    tls_openssl_options_parse(uschar *, long *);
  68 # endif
  69 extern uschar * tls_field_from_dn(uschar *, const uschar *);
  70 extern BOOL    tls_is_name_for_cert(const uschar *, void *);
  71
  72 # ifdef EXPERIMENTAL_DANE
  73 extern int     tlsa_lookup(const host_item *, dns_answer *, BOOL, BOOL *);
  74 # endif
  75
  76 #endif  /*SUPPORT_TLS*/
  77
  78
  79 /* Everything else... */
  80
  81 extern acl_block *acl_read(uschar *(*)(void), uschar **);
  82 extern int     acl_check(int, uschar *, uschar *, uschar **, uschar **);
  83 extern int     acl_eval(int, uschar *, uschar **, uschar **);
  84
  85 extern tree_node *acl_var_create(uschar *);
  86 extern void    acl_var_write(uschar *, uschar *, void *);
  87 extern uschar *auth_b64encode(uschar *, int);
  88 extern int     auth_b64decode(uschar *, uschar **);
  89 extern int     auth_call_pam(const uschar *, uschar **);
  90 extern int     auth_call_pwcheck(uschar *, uschar **);
  91 extern int     auth_call_radius(const uschar *, uschar **);
  92 extern int     auth_call_saslauthd(const uschar *, const uschar *,
  93                  const uschar *, const uschar *, uschar **);
  94 extern int     auth_check_serv_cond(auth_instance *);
  95 extern int     auth_check_some_cond(auth_instance *, uschar *, uschar *, int);
  96
  97 extern int     auth_get_data(uschar **, uschar *, int);
  98 extern int     auth_get_no64_data(uschar **, uschar *);
  99 extern uschar *auth_xtextencode(uschar *, int);
 100 extern int     auth_xtextdecode(uschar *, uschar **);
 101
 102 extern void    cancel_cutthrough_connection(const char *);
 103 extern int     check_host(void *, const uschar *, const uschar **, uschar **);
 104 extern uschar **child_exec_exim(int, BOOL, int *, BOOL, int, ...);
 105 extern pid_t   child_open_uid(const uschar **, const uschar **, int,
 106                  uid_t *, gid_t *, int *, int *, uschar *, BOOL);
 107 extern uschar *cutthrough_finaldot(void);
 108 extern BOOL    cutthrough_flush_send(void);
 109 extern BOOL    cutthrough_headers_send(void);
 110 extern BOOL    cutthrough_predata(void);
 111 extern BOOL    cutthrough_puts(uschar *, int);
 112 extern BOOL    cutthrough_put_nl(void);
 113
 114 extern void    daemon_go(void);
 115
 116 #ifdef EXPERIMENTAL_DCC
 117 extern int     dcc_process(uschar **);
 118 #endif
 119
 120 extern void    debug_logging_activate(uschar *, uschar *);
 121 extern void    debug_print_argv(const uschar **);
 122 extern void    debug_print_ids(uschar *);
 123 extern void    debug_print_string(uschar *);
 124 extern void    debug_print_tree(tree_node *);
 125 extern void    debug_vprintf(const char *, va_list);
 126 extern void    decode_bits(unsigned int *, unsigned int *,
 127                   int, int, uschar *, bit_table *, int, uschar *, int);
 128 extern address_item *deliver_make_addr(uschar *, BOOL);
 129 extern void    deliver_init(void);
 130 extern void    delivery_log(int, address_item *, int, uschar *);
 131 extern int     deliver_message(uschar *, BOOL, BOOL);
 132 extern void    deliver_msglog(const char *, ...) PRINTF_FUNCTION(1,2);
 133 extern void    deliver_set_expansions(address_item *);
 134 extern int     deliver_split_address(address_item *);
 135 extern void    deliver_succeeded(address_item *);
 136
 137 extern uschar *deliver_get_sender_address (uschar *id);
 138
 139 #ifdef WITH_OLD_DEMIME
 140 extern int     demime(uschar **);
 141 #endif
 142 extern BOOL    directory_make(const uschar *, const uschar *, int, BOOL);
 143 #ifndef DISABLE_DKIM
 144 extern BOOL    dkim_transport_write_message(address_item *, int, int,
 145                    int, uschar *, uschar *, uschar *, uschar *, rewrite_rule *,
 146                    int, uschar *, uschar *, uschar *, uschar *, uschar *, uschar *);
 147 #endif
 148 extern dns_address *dns_address_from_rr(dns_answer *, dns_record *);
 149 extern int     dns_basic_lookup(dns_answer *, const uschar *, int);
 150 extern void    dns_build_reverse(const uschar *, uschar *);
 151 extern void    dns_init(BOOL, BOOL, BOOL);
 152 extern BOOL    dns_is_secure(const dns_answer *);
 153 extern int     dns_lookup(dns_answer *, const uschar *, int, const uschar **);
 154 extern void    dns_pattern_init(void);
 155 extern int     dns_special_lookup(dns_answer *, const uschar *, int, const uschar **);
 156 extern dns_record *dns_next_rr(dns_answer *, dns_scan *, int);
 157 extern uschar *dns_text_type(int);
 158 extern void    dscp_list_to_stream(FILE *);
 159 extern BOOL    dscp_lookup(const uschar *, int, int *, int *, int *);
 160
 161 extern void    enq_end(uschar *);
 162 extern BOOL    enq_start(uschar *);
 163 #ifdef EXPERIMENTAL_EVENT
 164 extern uschar *event_raise(uschar *, const uschar *, uschar *);
 165 #endif
 166 extern void    exim_exit(int);
 167 extern void    exim_nullstd(void);
 168 extern void    exim_setugid(uid_t, gid_t, BOOL, uschar *);
 169 extern int     exim_tvcmp(struct timeval *, struct timeval *);
 170 extern void    exim_wait_tick(struct timeval *, int);
 171 extern int     exp_bool(address_item *addr,
 172   uschar *mtype, uschar *mname, unsigned dgb_opt, uschar *oname, BOOL bvalue,
 173   uschar *svalue, BOOL *rvalue);
 174 extern BOOL    expand_check_condition(uschar *, uschar *, uschar *);
 175 extern uschar *expand_string(uschar *); /* public, cannot make const */
 176 extern const uschar *expand_cstring(const uschar *); /* ... so use this one */
 177 extern uschar *expand_string_copy(const uschar *);
 178 extern int_eximarith_t expand_string_integer(uschar *, BOOL);
 179 extern void    modify_variable(uschar *, void *);
 180
 181 extern BOOL    fd_ready(int, int);
 182
 183 extern int     filter_interpret(uschar *, int, address_item **, uschar **);
 184 extern BOOL    filter_personal(string_item *, BOOL);
 185 extern BOOL    filter_runtest(int, uschar *, BOOL, BOOL);
 186 extern BOOL    filter_system_interpret(address_item **, uschar **);
 187
 188 extern uschar * fn_hdrs_added(void);
 189
 190 extern void    header_add(int, const char *, ...);
 191 extern int     header_checkname(header_line *, BOOL);
 192 extern BOOL    header_match(uschar *, BOOL, BOOL, string_item *, int, ...);
 193 extern int     host_address_extract_port(uschar *);
 194 extern uschar *host_and_ident(BOOL);
 195 extern int     host_aton(const uschar *, int *);
 196 extern void    host_build_hostlist(host_item **, const uschar *, BOOL);
 197 extern ip_address_item *host_build_ifacelist(const uschar *, uschar *);
 198 extern void    host_build_log_info(void);
 199 extern void    host_build_sender_fullhost(void);
 200 extern BOOL    host_find_byname(host_item *, const uschar *, int, const uschar **, BOOL);
 201 extern int     host_find_bydns(host_item *, const uschar *, int, uschar *, uschar *,
 202                  uschar *, uschar *, uschar *, const uschar **, BOOL *);
 203 extern ip_address_item *host_find_interfaces(void);
 204 extern BOOL    host_is_in_net(const uschar *, const uschar *, int);
 205 extern BOOL    host_is_tls_on_connect_port(int);
 206 extern int     host_item_get_port(host_item *);
 207 extern void    host_mask(int, int *, int);
 208 extern int     host_name_lookup(void);
 209 extern int     host_nmtoa(int, int *, int, uschar *, int);
 210 extern uschar *host_ntoa(int, const void *, uschar *, int *);
 211 extern int     host_scan_for_local_hosts(host_item *, host_item **, BOOL *);
 212
 213 extern void    invert_address(uschar *, uschar *);
 214 extern int     ip_addr(void *, int, const uschar *, int);
 215 extern int     ip_bind(int, int, uschar *, int);
 216 extern int     ip_connect(int, int, const uschar *, int, int);
 217 extern int     ip_connectedsocket(int, const uschar *, int, int,
 218                  int, host_item *, uschar **);
 219 extern int     ip_get_address_family(int);
 220 extern void    ip_keepalive(int, const uschar *, BOOL);
 221 extern int     ip_recv(int, uschar *, int, int);
 222 extern int     ip_socket(int, int);
 223
 224 extern int     ip_tcpsocket(const uschar *, uschar **, int);
 225 extern int     ip_unixsocket(const uschar *, uschar **);
 226 extern int     ip_streamsocket(const uschar *, uschar **, int);
 227
 228 extern uschar *local_part_quote(uschar *);
 229 extern int     log_create(uschar *);
 230 extern int     log_create_as_exim(uschar *);
 231 extern void    log_close_all(void);
 232
 233 #ifdef WITH_CONTENT_SCAN
 234 extern int     malware(const uschar *, int);
 235 extern int     malware_in_file(uschar *);
 236 extern void    malware_init(void);
 237 #endif
 238 extern int     match_address_list(const uschar *, BOOL, BOOL, const uschar **,
 239                  unsigned int *, int, int, const uschar **);
 240 extern int     match_check_list(const uschar **, int, tree_node **, unsigned int **,
 241                  int(*)(void *, const uschar *, const uschar **, uschar **), void *, int,
 242                  const uschar *, const uschar **);
 243 extern int     match_isinlist(const uschar *, const uschar **, int, tree_node **,
 244                  unsigned int *, int, BOOL, const uschar **);
 245 extern int     match_check_string(const uschar *, const uschar *, int, BOOL, BOOL, BOOL,
 246                  const uschar **);
 247 extern void    md5_end(md5 *, const uschar *, int, uschar *);
 248 extern void    md5_mid(md5 *, const uschar *);
 249 extern void    md5_start(md5 *);
 250 extern void    millisleep(int);
 251 #ifdef WITH_CONTENT_SCAN
 252 struct mime_boundary_context;
 253 extern int     mime_acl_check(uschar *acl, FILE *f,
 254                  struct mime_boundary_context *, uschar **, uschar **);
 255 extern int     mime_decode(const uschar **);
 256 extern int     mime_regex(const uschar **);
 257 #endif
 258 extern uschar *moan_check_errorcopy(uschar *);
 259 extern BOOL    moan_skipped_syntax_errors(uschar *, error_block *, uschar *,
 260                  BOOL, uschar *);
 261 extern void    moan_smtp_batch(uschar *, const char *, ...) PRINTF_FUNCTION(2,3);
 262 extern void    moan_tell_someone(uschar *, address_item *,
 263                  const uschar *, const char *, ...) PRINTF_FUNCTION(4,5);
 264 extern BOOL    moan_to_sender(int, error_block *, header_line *, FILE *, BOOL);
 265 extern void    moan_write_from(FILE *);
 266 extern FILE   *modefopen(const uschar *, const char *, mode_t);
 267
 268 extern void   open_cutthrough_connection( address_item * addr );
 269
 270 extern uschar *parse_extract_address(uschar *, uschar **, int *, int *, int *,
 271                  BOOL);
 272 extern int     parse_forward_list(uschar *, int, address_item **, uschar **,
 273                  const uschar *, uschar *, error_block **);
 274 extern uschar *parse_find_address_end(uschar *, BOOL);
 275 extern uschar *parse_find_at(uschar *);
 276 extern const uschar *parse_fix_phrase(const uschar *, int, uschar *, int);
 277 extern uschar *parse_message_id(uschar *, uschar **, uschar **);
 278 extern const uschar *parse_quote_2047(const uschar *, int, uschar *, uschar *, int, BOOL);
 279 extern uschar *parse_date_time(uschar *str, time_t *t);
 280 extern int     vaguely_random_number(int);
 281 #ifdef SUPPORT_TLS
 282 extern int     vaguely_random_number_fallback(int);
 283 #endif
 284
 285 extern BOOL    queue_action(uschar *, int, uschar **, int, int);
 286 extern void    queue_check_only(void);
 287 extern void    queue_list(int, uschar **, int);
 288 extern void    queue_count(void);
 289 extern void    queue_run(uschar *, uschar *, BOOL);
 290
 291 extern int     random_number(int);
 292 extern int     rda_interpret(redirect_block *, int, uschar *, uschar *,
 293                  uschar *, uschar *, uschar *, ugid_block *, address_item **,
 294                  uschar **, error_block **, int *, uschar *);
 295 extern int     rda_is_filter(const uschar *);
 296 extern BOOL    readconf_depends(driver_instance *, uschar *);
 297 extern void    readconf_driver_init(uschar *, driver_instance **,
 298                  driver_info *, int, void *, int, optionlist *, int);
 299 extern uschar *readconf_find_option(void *);
 300 extern void    readconf_main(void);
 301 extern void    readconf_print(uschar *, uschar *, BOOL);
 302 extern uschar *readconf_printtime(int);
 303 extern uschar *readconf_readname(uschar *, int, uschar *);
 304 extern int     readconf_readtime(const uschar *, int, BOOL);
 305 extern void    readconf_rest();
 306 extern uschar *readconf_retry_error(const uschar *, const uschar *, int *, int *);
 307 extern void    read_message_body(BOOL);
 308 extern void    receive_bomb_out(uschar *, uschar *);
 309 extern BOOL    receive_check_fs(int);
 310 extern BOOL    receive_check_set_sender(uschar *);
 311 extern BOOL    receive_msg(BOOL);
 312 extern int     receive_statvfs(BOOL, int *);
 313 extern void    receive_swallow_smtp(void);
 314 #ifdef WITH_CONTENT_SCAN
 315 extern int     regex(const uschar **);
 316 #endif
 317 extern BOOL    regex_match_and_setup(const pcre *, const uschar *, int, int);
 318 extern const pcre *regex_must_compile(const uschar *, BOOL, BOOL);
 319 extern void    retry_add_item(address_item *, uschar *, int);
 320 extern BOOL    retry_check_address(const uschar *, host_item *, uschar *, BOOL,
 321                  uschar **, uschar **);
 322 extern retry_config *retry_find_config(const uschar *, const uschar *, int, int);
 323 extern BOOL    retry_ultimate_address_timeout(uschar *, const uschar *,
 324                  dbdata_retry *, time_t);
 325 extern void    retry_update(address_item **, address_item **, address_item **);
 326 extern uschar *rewrite_address(uschar *, BOOL, BOOL, rewrite_rule *, int);
 327 extern uschar *rewrite_address_qualify(uschar *, BOOL);
 328 extern header_line *rewrite_header(header_line *,
 329                const uschar *, const uschar *,
 330                rewrite_rule *, int, BOOL);
 331 extern uschar *rewrite_one(uschar *, int, BOOL *, BOOL, uschar *,
 332                  rewrite_rule *);
 333 extern void    rewrite_test(uschar *);
 334 extern uschar *rfc2047_decode2(uschar *, BOOL, uschar *, int, int *, int *,
 335                  uschar **);
 336 extern int     route_address(address_item *, address_item **, address_item **,
 337                  address_item **, address_item **, int);
 338 extern int     route_check_prefix(const uschar *, const uschar *);
 339 extern int     route_check_suffix(const uschar *, const uschar *);
 340 extern BOOL    route_findgroup(uschar *, gid_t *);
 341 extern BOOL    route_finduser(const uschar *, struct passwd **, uid_t *);
 342 extern BOOL    route_find_expanded_group(uschar *, uschar *, uschar *, gid_t *,
 343                  uschar **);
 344 extern BOOL    route_find_expanded_user(uschar *, uschar *, uschar *,
 345                  struct passwd **, uid_t *, uschar **);
 346 extern void    route_init(void);
 347 extern void    route_tidyup(void);
 348
 349 extern uschar *search_find(void *, uschar *, uschar *, int, const uschar *, int,
 350                  int, int *);
 351 extern int     search_findtype(const uschar *, int);
 352 extern int     search_findtype_partial(const uschar *, int *, const uschar **, int *,
 353                  int *);
 354 extern void   *search_open(uschar *, int, int, uid_t *, gid_t *);
 355 extern void    search_tidyup(void);
 356 extern void    set_process_info(const char *, ...) PRINTF_FUNCTION(1,2);
 357 extern void    sha1_end(sha1 *, const uschar *, int, uschar *);
 358 extern void    sha1_mid(sha1 *, const uschar *);
 359 extern void    sha1_start(sha1 *);
 360 extern int     sieve_interpret(uschar *, int, uschar *, uschar *, uschar *,
 361                  uschar *, address_item **, uschar **);
 362 extern void    sigalrm_handler(int);
 363 extern BOOL    smtp_buffered(void);
 364 extern void    smtp_closedown(uschar *);
 365 extern int     smtp_connect(host_item *, int, int, uschar *, int,
 366                  transport_instance *);
 367 extern int     smtp_sock_connect(host_item *, int, int, uschar *,
 368                  transport_instance * tb, int);
 369 extern int     smtp_feof(void);
 370 extern int     smtp_ferror(void);
 371 extern uschar *smtp_get_connection_info(void);
 372 extern BOOL    smtp_get_interface(uschar *, int, address_item *, BOOL *,
 373                  uschar **, uschar *);
 374 extern BOOL    smtp_get_port(uschar *, address_item *, int *, uschar *);
 375 extern int     smtp_getc(void);
 376 extern int     smtp_handle_acl_fail(int, int, uschar *, uschar *);
 377 extern void    smtp_log_no_mail(void);
 378 extern void    smtp_message_code(uschar **, int *, uschar **, uschar **);
 379 extern BOOL    smtp_read_response(smtp_inblock *, uschar *, int, int, int);
 380 extern void    smtp_respond(uschar *, int, BOOL, uschar *);
 381 extern void    smtp_notquit_exit(uschar *, uschar *, uschar *, ...);
 382 extern void    smtp_send_prohibition_message(int, uschar *);
 383 extern int     smtp_setup_msg(void);
 384 extern BOOL    smtp_start_session(void);
 385 extern int     smtp_ungetc(int);
 386 extern BOOL    smtp_verify_helo(void);
 387 extern int     smtp_write_command(smtp_outblock *, BOOL, const char *, ...) PRINTF_FUNCTION(3,4);
 388 #ifdef WITH_CONTENT_SCAN
 389 extern int     spam(const uschar **);
 390 extern FILE   *spool_mbox(unsigned long *, const uschar *);
 391 #endif
 392 extern BOOL    spool_move_message(uschar *, uschar *, uschar *, uschar *);
 393 extern BOOL    spool_open_datafile(uschar *);
 394 extern int     spool_open_temp(uschar *);
 395 extern int     spool_read_header(uschar *, BOOL, BOOL);
 396 extern int     spool_write_header(uschar *, int, uschar **);
 397 extern int     stdin_getc(void);
 398 extern int     stdin_feof(void);
 399 extern int     stdin_ferror(void);
 400 extern int     stdin_ungetc(int);
 401 extern uschar *string_append(uschar *, int *, int *, int, ...);
 402 extern uschar *string_append_listele(uschar *, uschar, const uschar *);
 403 extern uschar *string_append_listele_n(uschar *, uschar, const uschar *, unsigned);
 404 extern uschar *string_base62(unsigned long int);
 405 extern uschar *string_cat(uschar *, int *, int *, const uschar *, int);
 406 extern uschar *string_copy_dnsdomain(uschar *);
 407 extern uschar *string_copy_malloc(const uschar *);
 408 extern uschar *string_copylc(const uschar *);
 409 extern uschar *string_copynlc(uschar *, int);
 410 extern uschar *string_dequote(const uschar **);
 411 extern BOOL    string_format(uschar *, int, const char *, ...) ALMOST_PRINTF(3,4);
 412 extern uschar *string_format_size(int, uschar *);
 413 extern int     string_interpret_escape(const uschar **);
 414 extern int     string_is_ip_address(const uschar *, int *);
 415 extern uschar *string_log_address(address_item *, BOOL, BOOL);
 416 extern uschar *string_nextinlist(const uschar **, int *, uschar *, int);
 417 extern uschar *string_open_failed(int, const char *, ...) PRINTF_FUNCTION(2,3);
 418 extern const uschar *string_printing2(const uschar *, BOOL);
 419 extern uschar *string_split_message(uschar *);
 420 extern uschar *string_unprinting(uschar *);
 421 extern BOOL    string_vformat(uschar *, int, const char *, va_list);
 422 extern int     strcmpic(const uschar *, const uschar *);
 423 extern int     strncmpic(const uschar *, const uschar *, int);
 424 extern uschar *strstric(uschar *, uschar *, BOOL);
 425
 426 extern uschar *tod_stamp(int);
 427
 428 extern void    tls_modify_variables(tls_support *);
 429 extern BOOL    transport_check_waiting(const uschar *, const uschar *, int, uschar *,
 430                  BOOL *, oicf, void*);
 431 extern void    transport_init(void);
 432 extern BOOL    transport_pass_socket(const uschar *, const uschar *, const uschar *, uschar *,
 433                  int);
 434 extern uschar *transport_rcpt_address(address_item *, BOOL);
 435 extern BOOL    transport_set_up_command(const uschar ***, uschar *,
 436                  BOOL, int, address_item *, uschar *, uschar **);
 437 extern void    transport_update_waiting(host_item *, uschar *);
 438 extern BOOL    transport_write_block(int, uschar *, int);
 439 extern BOOL    transport_write_string(int, const char *, ...);
 440 extern BOOL    transport_headers_send(address_item *, int, uschar *, uschar *,
 441                  BOOL (*)(int, uschar *, int, BOOL), BOOL, rewrite_rule *, int);
 442 extern BOOL    transport_write_message(address_item *, int, int, int, uschar *,
 443                  uschar *, uschar *, uschar *, rewrite_rule *, int);
 444 extern void    tree_add_duplicate(uschar *, address_item *);
 445 extern void    tree_add_nonrecipient(uschar *);
 446 extern void    tree_add_unusable(host_item *);
 447 extern int     tree_insertnode(tree_node **, tree_node *);
 448 extern tree_node *tree_search(tree_node *, const uschar *);
 449 extern void    tree_write(tree_node *, FILE *);
 450 extern void    tree_walk(tree_node *, void (*)(uschar*, uschar*, void*), void *);
 451
 452 #ifdef WITH_CONTENT_SCAN
 453 extern void    unspool_mbox(void);
 454 #endif
 455
 456 extern int     verify_address(address_item *, FILE *, int, int, int, int,
 457                  uschar *, uschar *, BOOL *);
 458 extern int     verify_check_dnsbl(const uschar **);
 459 extern int     verify_check_header_address(uschar **, uschar **, int, int, int,
 460                  uschar *, uschar *, int, int *);
 461 extern int     verify_check_headers(uschar **);
 462 extern int     verify_check_header_names_ascii(uschar **);
 463 extern int     verify_check_host(uschar **);
 464 extern int     verify_check_notblind(void);
 465 extern int     verify_check_given_host(uschar **, host_item *);
 466 extern int     verify_check_this_host(const uschar **, unsigned int *,
 467                  const uschar*, const uschar *, const uschar **);
 468 extern address_item *verify_checked_sender(uschar *);
 469 extern void    verify_get_ident(int);
 470 extern BOOL    verify_sender(int *, uschar **);
 471 extern BOOL    verify_sender_preliminary(int *, uschar **);
 472 extern void    version_init(void);
 473
 474 extern ssize_t write_to_fd_buf(int, const uschar *, size_t);
 475
 476 /* vi: aw
 477 */
 478 /* End of functions.h */