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