src/src/functions.h

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2017 */
   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 gstring *call_perl_cat(gstring *, uschar **, uschar *,
  17                  uschar **) WARN_UNUSED_RESULT;
  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                 uschar **);
  53 extern void    tls_close(BOOL, BOOL);
  54 extern BOOL    tls_could_read(void);
  55 extern int     tls_export_cert(uschar *, size_t, void *);
  56 extern int     tls_feof(void);
  57 extern int     tls_ferror(void);
  58 extern void    tls_free_cert(void **);
  59 extern int     tls_getc(unsigned);
  60 extern uschar *tls_getbuf(unsigned *);
  61 extern void    tls_get_cache(void);
  62 extern int     tls_import_cert(const uschar *, void **);
  63 extern int     tls_read(BOOL, uschar *, size_t);
  64 extern int     tls_server_start(const uschar *, uschar **);
  65 extern BOOL    tls_smtp_buffered(void);
  66 extern int     tls_ungetc(int);
  67 extern int     tls_write(BOOL, const uschar *, size_t, BOOL);
  68 extern uschar *tls_validate_require_cipher(void);
  69 extern void    tls_version_report(FILE *);
  70 # ifndef USE_GNUTLS
  71 extern BOOL    tls_openssl_options_parse(uschar *, long *);
  72 # endif
  73 extern uschar * tls_field_from_dn(uschar *, const uschar *);
  74 extern BOOL    tls_is_name_for_cert(const uschar *, void *);
  75
  76 # ifdef EXPERIMENTAL_DANE
  77 extern int     tlsa_lookup(const host_item *, dns_answer *, BOOL);
  78 # endif
  79
  80 #endif  /*SUPPORT_TLS*/
  81
  82
  83 /* Everything else... */
  84
  85 extern acl_block *acl_read(uschar *(*)(void), uschar **);
  86 extern int     acl_check(int, uschar *, uschar *, uschar **, uschar **);
  87 extern int     acl_eval(int, uschar *, uschar **, uschar **);
  88
  89 extern tree_node *acl_var_create(uschar *);
  90 extern void    acl_var_write(uschar *, uschar *, void *);
  91 extern void    assert_no_variables(void *, int, const char *, int);
  92 extern int     auth_call_pam(const uschar *, uschar **);
  93 extern int     auth_call_pwcheck(uschar *, uschar **);
  94 extern int     auth_call_radius(const uschar *, uschar **);
  95 extern int     auth_call_saslauthd(const uschar *, const uschar *,
  96                  const uschar *, const uschar *, uschar **);
  97 extern int     auth_check_serv_cond(auth_instance *);
  98 extern int     auth_check_some_cond(auth_instance *, uschar *, uschar *, int);
  99
 100
 101 extern int     auth_get_data(uschar **, uschar *, int);
 102 extern int     auth_get_no64_data(uschar **, uschar *);
 103 extern void    auth_show_supported(FILE *);
 104 extern uschar *auth_xtextencode(uschar *, int);
 105 extern int     auth_xtextdecode(uschar *, uschar **);
 106
 107 extern uschar *b64encode(uschar *, int);
 108 extern int     b64decode(const uschar *, uschar **);
 109 extern int     bdat_getc(unsigned);
 110 extern uschar *bdat_getbuf(unsigned *);
 111 extern int     bdat_ungetc(int);
 112 extern void    bdat_flush_data(void);
 113
 114 extern void    bits_clear(unsigned int *, size_t, int *);
 115 extern void    bits_set(unsigned int *, size_t, int *);
 116
 117 extern void    cancel_cutthrough_connection(BOOL, const uschar *);
 118 extern int     check_host(void *, const uschar *, const uschar **, uschar **);
 119 extern uschar **child_exec_exim(int, BOOL, int *, BOOL, int, ...);
 120 extern pid_t   child_open_uid(const uschar **, const uschar **, int,
 121                  uid_t *, gid_t *, int *, int *, uschar *, BOOL);
 122 extern BOOL    cleanup_environment(void);
 123 extern void    cutthrough_data_puts(uschar *, int);
 124 extern void    cutthrough_data_put_nl(void);
 125 extern uschar *cutthrough_finaldot(void);
 126 extern BOOL    cutthrough_flush_send(void);
 127 extern BOOL    cutthrough_headers_send(void);
 128 extern BOOL    cutthrough_predata(void);
 129 extern void    release_cutthrough_connection(const uschar *);
 130
 131 extern void    daemon_go(void);
 132
 133 #ifdef EXPERIMENTAL_DCC
 134 extern int     dcc_process(uschar **);
 135 #endif
 136
 137 extern void    debug_logging_activate(uschar *, uschar *);
 138 extern void    debug_logging_stop(void);
 139 extern void    debug_print_argv(const uschar **);
 140 extern void    debug_print_ids(uschar *);
 141 extern void    debug_printf_indent(const char *, ...) PRINTF_FUNCTION(1,2);
 142 extern void    debug_print_string(uschar *);
 143 extern void    debug_print_tree(tree_node *);
 144 extern void    debug_vprintf(int, const char *, va_list);
 145 extern void    decode_bits(unsigned int *, size_t, int *,
 146                    uschar *, bit_table *, int, uschar *, int);
 147 extern address_item *deliver_make_addr(uschar *, BOOL);
 148 extern void    deliver_init(void);
 149 extern void    delivery_log(int, address_item *, int, uschar *);
 150 extern int     deliver_message(uschar *, BOOL, BOOL);
 151 extern void    deliver_msglog(const char *, ...) PRINTF_FUNCTION(1,2);
 152 extern void    deliver_set_expansions(address_item *);
 153 extern int     deliver_split_address(address_item *);
 154 extern void    deliver_succeeded(address_item *);
 155
 156 extern uschar *deliver_get_sender_address (uschar *id);
 157 extern void    delivery_re_exec(int);
 158
 159 extern BOOL    directory_make(const uschar *, const uschar *, int, BOOL);
 160 #ifndef DISABLE_DKIM
 161 extern BOOL    dkim_transport_write_message(transport_ctx *,
 162                   struct ob_dkim *, const uschar ** errstr);
 163 #endif
 164 extern dns_address *dns_address_from_rr(dns_answer *, dns_record *);
 165 extern int     dns_basic_lookup(dns_answer *, const uschar *, int);
 166 extern void    dns_build_reverse(const uschar *, uschar *);
 167 extern void    dns_init(BOOL, BOOL, BOOL);
 168 extern BOOL    dns_is_aa(const dns_answer *);
 169 extern BOOL    dns_is_secure(const dns_answer *);
 170 extern int     dns_lookup(dns_answer *, const uschar *, int, const uschar **);
 171 extern void    dns_pattern_init(void);
 172 extern int     dns_special_lookup(dns_answer *, const uschar *, int, const uschar **);
 173 extern dns_record *dns_next_rr(const dns_answer *, dns_scan *, int);
 174 extern uschar *dns_text_type(int);
 175 extern void    dscp_list_to_stream(FILE *);
 176 extern BOOL    dscp_lookup(const uschar *, int, int *, int *, int *);
 177
 178 extern void    enq_end(uschar *);
 179 extern BOOL    enq_start(uschar *, unsigned);
 180 #ifndef DISABLE_EVENT
 181 extern uschar *event_raise(uschar *, const uschar *, uschar *);
 182 extern void    msg_event_raise(const uschar *, const address_item *);
 183 #endif
 184 extern const uschar * exim_errstr(int);
 185 extern void    exim_exit(int, const uschar *);
 186 extern void    exim_nullstd(void);
 187 extern void    exim_setugid(uid_t, gid_t, BOOL, uschar *);
 188 extern void    exim_wait_tick(struct timeval *, int);
 189 extern int     exp_bool(address_item *addr,
 190   uschar *mtype, uschar *mname, unsigned dgb_opt, uschar *oname, BOOL bvalue,
 191   uschar *svalue, BOOL *rvalue);
 192 extern BOOL    expand_check_condition(uschar *, uschar *, uschar *);
 193 extern uschar *expand_string(uschar *); /* public, cannot make const */
 194 extern const uschar *expand_cstring(const uschar *); /* ... so use this one */
 195 extern uschar *expand_hide_passwords(uschar * );
 196 extern uschar *expand_string_copy(const uschar *);
 197 extern int_eximarith_t expand_string_integer(uschar *, BOOL);
 198 extern void    modify_variable(uschar *, void *);
 199
 200 extern BOOL    fd_ready(int, int);
 201
 202 extern int     filter_interpret(uschar *, int, address_item **, uschar **);
 203 extern BOOL    filter_personal(string_item *, BOOL);
 204 extern BOOL    filter_runtest(int, uschar *, BOOL, BOOL);
 205 extern BOOL    filter_system_interpret(address_item **, uschar **);
 206
 207 extern uschar * fn_hdrs_added(void);
 208
 209 extern void    header_add(int, const char *, ...);
 210 extern int     header_checkname(header_line *, BOOL);
 211 extern BOOL    header_match(uschar *, BOOL, BOOL, string_item *, int, ...);
 212 extern int     host_address_extract_port(uschar *);
 213 extern uschar *host_and_ident(BOOL);
 214 extern int     host_aton(const uschar *, int *);
 215 extern void    host_build_hostlist(host_item **, const uschar *, BOOL);
 216 extern ip_address_item *host_build_ifacelist(const uschar *, uschar *);
 217 extern void    host_build_log_info(void);
 218 extern void    host_build_sender_fullhost(void);
 219 extern int     host_find_byname(host_item *, const uschar *, int,
 220                                 const uschar **, BOOL);
 221 extern int     host_find_bydns(host_item *, const uschar *, int, uschar *, uschar *,
 222                  uschar *, const dnssec_domains *, const uschar **, BOOL *);
 223 extern ip_address_item *host_find_interfaces(void);
 224 extern BOOL    host_is_in_net(const uschar *, const uschar *, int);
 225 extern BOOL    host_is_tls_on_connect_port(int);
 226 extern int     host_item_get_port(host_item *);
 227 extern void    host_mask(int, int *, int);
 228 extern int     host_name_lookup(void);
 229 extern int     host_nmtoa(int, int *, int, uschar *, int);
 230 extern uschar *host_ntoa(int, const void *, uschar *, int *);
 231 extern int     host_scan_for_local_hosts(host_item *, host_item **, BOOL *);
 232
 233 extern uschar *imap_utf7_encode(uschar *, const uschar *,
 234                                  uschar, uschar *, uschar **);
 235
 236 extern void    invert_address(uschar *, uschar *);
 237 extern int     ip_addr(void *, int, const uschar *, int);
 238 extern int     ip_bind(int, int, uschar *, int);
 239 extern int     ip_connect(int, int, const uschar *, int, int, const blob *);
 240 extern int     ip_connectedsocket(int, const uschar *, int, int,
 241                  int, host_item *, uschar **, const blob *);
 242 extern int     ip_get_address_family(int);
 243 extern void    ip_keepalive(int, const uschar *, BOOL);
 244 extern int     ip_recv(int, uschar *, int, int);
 245 extern int     ip_socket(int, int);
 246
 247 extern int     ip_tcpsocket(const uschar *, uschar **, int);
 248 extern int     ip_unixsocket(const uschar *, uschar **);
 249 extern int     ip_streamsocket(const uschar *, uschar **, int);
 250
 251 extern int     ipv6_nmtoa(int *, uschar *);
 252
 253 extern uschar *local_part_quote(uschar *);
 254 extern int     log_create(uschar *);
 255 extern int     log_create_as_exim(uschar *);
 256 extern void    log_close_all(void);
 257
 258 extern macro_item * macro_create(const uschar *, const uschar *, BOOL);
 259 extern BOOL    macro_read_assignment(uschar *);
 260 extern uschar *macros_expand(int, int *, BOOL *);
 261 extern void    mainlog_close(void);
 262 #ifdef WITH_CONTENT_SCAN
 263 extern int     malware(const uschar *, int);
 264 extern int     malware_in_file(uschar *);
 265 extern void    malware_init(void);
 266 #endif
 267 extern int     match_address_list(const uschar *, BOOL, BOOL, const uschar **,
 268                  unsigned int *, int, int, const uschar **);
 269 extern int     match_address_list_basic(const uschar *, const uschar **, int);
 270 extern int     match_check_list(const uschar **, int, tree_node **, unsigned int **,
 271                  int(*)(void *, const uschar *, const uschar **, uschar **), void *, int,
 272                  const uschar *, const uschar **);
 273 extern int     match_isinlist(const uschar *, const uschar **, int, tree_node **,
 274                  unsigned int *, int, BOOL, const uschar **);
 275 extern int     match_check_string(const uschar *, const uschar *, int, BOOL, BOOL, BOOL,
 276                  const uschar **);
 277 extern void    md5_end(md5 *, const uschar *, int, uschar *);
 278 extern void    md5_mid(md5 *, const uschar *);
 279 extern void    md5_start(md5 *);
 280 extern void    millisleep(int);
 281 #ifdef WITH_CONTENT_SCAN
 282 struct mime_boundary_context;
 283 extern int     mime_acl_check(uschar *acl, FILE *f,
 284                  struct mime_boundary_context *, uschar **, uschar **);
 285 extern int     mime_decode(const uschar **);
 286 extern ssize_t mime_decode_base64(FILE *, FILE *, uschar *);
 287 extern int     mime_regex(const uschar **);
 288 extern void    mime_set_anomaly(int);
 289 #endif
 290 extern uschar *moan_check_errorcopy(uschar *);
 291 extern BOOL    moan_skipped_syntax_errors(uschar *, error_block *, uschar *,
 292                  BOOL, uschar *);
 293 extern void    moan_smtp_batch(uschar *, const char *, ...) PRINTF_FUNCTION(2,3);
 294 extern void    moan_tell_someone(uschar *, address_item *,
 295                  const uschar *, const char *, ...) PRINTF_FUNCTION(4,5);
 296 extern BOOL    moan_to_sender(int, error_block *, header_line *, FILE *, BOOL);
 297 extern void    moan_write_from(FILE *);
 298 extern FILE   *modefopen(const uschar *, const char *, mode_t);
 299
 300 extern int     open_cutthrough_connection( address_item * addr );
 301
 302 extern uschar *parse_extract_address(uschar *, uschar **, int *, int *, int *,
 303                  BOOL);
 304 extern int     parse_forward_list(uschar *, int, address_item **, uschar **,
 305                  const uschar *, uschar *, error_block **);
 306 extern uschar *parse_find_address_end(uschar *, BOOL);
 307 extern uschar *parse_find_at(uschar *);
 308 extern const uschar *parse_fix_phrase(const uschar *, int, uschar *, int);
 309 extern uschar *parse_message_id(uschar *, uschar **, uschar **);
 310 extern const uschar *parse_quote_2047(const uschar *, int, uschar *, uschar *, int, BOOL);
 311 extern uschar *parse_date_time(uschar *str, time_t *t);
 312 extern int     vaguely_random_number(int);
 313 #ifdef SUPPORT_TLS
 314 extern int     vaguely_random_number_fallback(int);
 315 #endif
 316
 317 extern BOOL    queue_action(uschar *, int, uschar **, int, int);
 318 extern void    queue_check_only(void);
 319 extern void    queue_list(int, uschar **, int);
 320 extern void    queue_count(void);
 321 extern void    queue_run(uschar *, uschar *, BOOL);
 322
 323 extern int     random_number(int);
 324 extern int     rda_interpret(redirect_block *, int, uschar *, uschar *,
 325                  uschar *, uschar *, uschar *, ugid_block *, address_item **,
 326                  uschar **, error_block **, int *, uschar *);
 327 extern int     rda_is_filter(const uschar *);
 328 extern BOOL    readconf_depends(driver_instance *, uschar *);
 329 extern void    readconf_driver_init(uschar *, driver_instance **,
 330                  driver_info *, int, void *, int, optionlist *, int);
 331 extern uschar *readconf_find_option(void *);
 332 extern void    readconf_main(BOOL);
 333 extern void    readconf_options_from_list(optionlist *, unsigned, const uschar *, uschar *);
 334 extern void    readconf_print(uschar *, uschar *, BOOL);
 335 extern uschar *readconf_printtime(int);
 336 extern uschar *readconf_readname(uschar *, int, uschar *);
 337 extern int     readconf_readtime(const uschar *, int, BOOL);
 338 extern void    readconf_rest(void);
 339 extern uschar *readconf_retry_error(const uschar *, const uschar *, int *, int *);
 340 extern void    readconf_save_config(const uschar *);
 341 extern void    read_message_body(BOOL);
 342 extern void    receive_bomb_out(uschar *, uschar *);
 343 extern BOOL    receive_check_fs(int);
 344 extern BOOL    receive_check_set_sender(uschar *);
 345 extern BOOL    receive_msg(BOOL);
 346 extern int     receive_statvfs(BOOL, int *);
 347 extern void    receive_swallow_smtp(void);
 348 #ifdef WITH_CONTENT_SCAN
 349 extern int     regex(const uschar **);
 350 #endif
 351 extern BOOL    regex_match_and_setup(const pcre *, const uschar *, int, int);
 352 extern const pcre *regex_must_compile(const uschar *, BOOL, BOOL);
 353 extern void    retry_add_item(address_item *, uschar *, int);
 354 extern BOOL    retry_check_address(const uschar *, host_item *, uschar *, BOOL,
 355                  uschar **, uschar **);
 356 extern retry_config *retry_find_config(const uschar *, const uschar *, int, int);
 357 extern BOOL    retry_ultimate_address_timeout(uschar *, const uschar *,
 358                  dbdata_retry *, time_t);
 359 extern void    retry_update(address_item **, address_item **, address_item **);
 360 extern uschar *rewrite_address(uschar *, BOOL, BOOL, rewrite_rule *, int);
 361 extern uschar *rewrite_address_qualify(uschar *, BOOL);
 362 extern header_line *rewrite_header(header_line *,
 363                const uschar *, const uschar *,
 364                rewrite_rule *, int, BOOL);
 365 extern uschar *rewrite_one(uschar *, int, BOOL *, BOOL, uschar *,
 366                  rewrite_rule *);
 367 extern void    rewrite_test(uschar *);
 368 extern uschar *rfc2047_decode2(uschar *, BOOL, uschar *, int, int *, int *,
 369                  uschar **);
 370 extern int     route_address(address_item *, address_item **, address_item **,
 371                  address_item **, address_item **, int);
 372 extern int     route_check_prefix(const uschar *, const uschar *);
 373 extern int     route_check_suffix(const uschar *, const uschar *);
 374 extern BOOL    route_findgroup(uschar *, gid_t *);
 375 extern BOOL    route_finduser(const uschar *, struct passwd **, uid_t *);
 376 extern BOOL    route_find_expanded_group(uschar *, uschar *, uschar *, gid_t *,
 377                  uschar **);
 378 extern BOOL    route_find_expanded_user(uschar *, uschar *, uschar *,
 379                  struct passwd **, uid_t *, uschar **);
 380 extern void    route_init(void);
 381 extern void    route_show_supported(FILE *);
 382 extern void    route_tidyup(void);
 383
 384 extern uschar *search_find(void *, uschar *, uschar *, int, const uschar *, int,
 385                  int, int *);
 386 extern int     search_findtype(const uschar *, int);
 387 extern int     search_findtype_partial(const uschar *, int *, const uschar **, int *,
 388                  int *);
 389 extern void   *search_open(uschar *, int, int, uid_t *, gid_t *);
 390 extern void    search_tidyup(void);
 391 extern void    set_process_info(const char *, ...) PRINTF_FUNCTION(1,2);
 392 extern void    sha1_end(hctx *, const uschar *, int, uschar *);
 393 extern void    sha1_mid(hctx *, const uschar *);
 394 extern void    sha1_start(hctx *);
 395 extern int     sieve_interpret(uschar *, int, uschar *, uschar *, uschar *,
 396                  uschar *, address_item **, uschar **);
 397 extern void    sigalrm_handler(int);
 398 extern BOOL    smtp_buffered(void);
 399 extern void    smtp_closedown(uschar *);
 400 extern uschar *smtp_cmd_hist(void);
 401 extern int     smtp_connect(host_item *, int, uschar *, int,
 402                  transport_instance *);
 403 extern int     smtp_sock_connect(host_item *, int, int, uschar *,
 404                  transport_instance * tb, int, const blob *);
 405 extern int     smtp_feof(void);
 406 extern int     smtp_ferror(void);
 407 extern uschar *smtp_get_connection_info(void);
 408 extern BOOL    smtp_get_interface(uschar *, int, address_item *,
 409                  uschar **, uschar *);
 410 extern BOOL    smtp_get_port(uschar *, address_item *, int *, uschar *);
 411 extern int     smtp_getc(unsigned);
 412 extern uschar *smtp_getbuf(unsigned *);
 413 extern void    smtp_get_cache(void);
 414 extern int     smtp_handle_acl_fail(int, int, uschar *, uschar *);
 415 extern void    smtp_log_no_mail(void);
 416 extern void    smtp_message_code(uschar **, int *, uschar **, uschar **, BOOL);
 417 extern void    smtp_proxy_tls(uschar *, size_t, int *, int);
 418 extern BOOL    smtp_read_response(smtp_inblock *, uschar *, int, int, int);
 419 extern void    smtp_respond(uschar *, int, BOOL, uschar *);
 420 extern void    smtp_notquit_exit(uschar *, uschar *, uschar *, ...);
 421 extern void    smtp_port_for_connect(host_item *, int);
 422 extern void    smtp_send_prohibition_message(int, uschar *);
 423 extern int     smtp_setup_msg(void);
 424 extern BOOL    smtp_start_session(void);
 425 extern int     smtp_ungetc(int);
 426 extern BOOL    smtp_verify_helo(void);
 427 extern int     smtp_write_command(smtp_outblock *, int, const char *, ...) PRINTF_FUNCTION(3,4);
 428 #ifdef WITH_CONTENT_SCAN
 429 extern int     spam(const uschar **);
 430 extern FILE   *spool_mbox(unsigned long *, const uschar *, uschar **);
 431 #endif
 432 extern BOOL    spool_move_message(uschar *, uschar *, uschar *, uschar *);
 433 extern uschar *spool_dname(const uschar *, uschar *);
 434 extern uschar *spool_fname(const uschar *, const uschar *, const uschar *, const uschar *);
 435 extern uschar *spool_sname(const uschar *, uschar *);
 436 extern int     spool_open_datafile(uschar *);
 437 extern int     spool_open_temp(uschar *);
 438 extern int     spool_read_header(uschar *, BOOL, BOOL);
 439 extern int     spool_write_header(uschar *, int, uschar **);
 440 extern int     stdin_getc(unsigned);
 441 extern int     stdin_feof(void);
 442 extern int     stdin_ferror(void);
 443 extern int     stdin_ungetc(int);
 444 extern gstring *string_append(gstring *, int, ...) WARN_UNUSED_RESULT;
 445 extern gstring *string_append_listele(gstring *, uschar, const uschar *) WARN_UNUSED_RESULT;
 446 extern gstring *string_append_listele_n(gstring *, uschar, const uschar *, unsigned) WARN_UNUSED_RESULT;
 447 extern uschar *string_base62(unsigned long int);
 448 extern gstring *string_cat (gstring *, const uschar *     ) WARN_UNUSED_RESULT;
 449 extern gstring *string_catn(gstring *, const uschar *, int) WARN_UNUSED_RESULT;
 450 extern int     string_compare_by_pointer(const void *, const void *);
 451 extern uschar *string_copy_dnsdomain(uschar *);
 452 extern uschar *string_copy_malloc(const uschar *);
 453 extern uschar *string_copylc(const uschar *);
 454 extern uschar *string_copynlc(uschar *, int);
 455 extern uschar *string_dequote(const uschar **);
 456 extern BOOL    string_format(uschar *, int, const char *, ...) ALMOST_PRINTF(3,4);
 457 extern uschar *string_format_size(int, uschar *);
 458 extern uschar *string_from_gstring(gstring *);
 459 extern gstring *string_get(unsigned);
 460 extern int     string_interpret_escape(const uschar **);
 461 extern int     string_is_ip_address(const uschar *, int *);
 462 #ifdef SUPPORT_I18N
 463 extern BOOL    string_is_utf8(const uschar *);
 464 #endif
 465 extern uschar *string_nextinlist(const uschar **, int *, uschar *, int);
 466 extern uschar *string_open_failed(int, const char *, ...) PRINTF_FUNCTION(2,3);
 467 extern const uschar *string_printing2(const uschar *, BOOL);
 468 extern uschar *string_split_message(uschar *);
 469 extern uschar *string_timesince(struct timeval *);
 470 extern uschar *string_unprinting(uschar *);
 471 #ifdef SUPPORT_I18N
 472 extern uschar *string_address_utf8_to_alabel(const uschar *, uschar **);
 473 extern uschar *string_domain_alabel_to_utf8(const uschar *, uschar **);
 474 extern uschar *string_domain_utf8_to_alabel(const uschar *, uschar **);
 475 extern uschar *string_localpart_alabel_to_utf8(const uschar *, uschar **);
 476 extern uschar *string_localpart_utf8_to_alabel(const uschar *, uschar **);
 477 #endif
 478 extern BOOL    string_vformat(uschar *, int, const char *, va_list);
 479 extern int     strcmpic(const uschar *, const uschar *);
 480 extern int     strncmpic(const uschar *, const uschar *, int);
 481 extern uschar *strstric(uschar *, uschar *, BOOL);
 482
 483 #ifdef EXIM_TFO_PROBE
 484 extern void    tfo_probe(void);
 485 #endif
 486 extern void    timesince(struct timeval * diff, struct timeval * then);
 487 extern void    tls_modify_variables(tls_support *);
 488 extern uschar *tod_stamp(int);
 489
 490 extern BOOL    transport_check_waiting(const uschar *, const uschar *, int, uschar *,
 491                  BOOL *, oicf, void*);
 492 extern void    transport_init(void);
 493 extern void    transport_do_pass_socket(const uschar *, const uschar *,
 494                  const uschar *, uschar *, int);
 495 extern BOOL    transport_pass_socket(const uschar *, const uschar *, const uschar *, uschar *,
 496                  int);
 497 extern uschar *transport_rcpt_address(address_item *, BOOL);
 498 extern BOOL    transport_set_up_command(const uschar ***, uschar *,
 499                  BOOL, int, address_item *, uschar *, uschar **);
 500 extern void    transport_update_waiting(host_item *, uschar *);
 501 extern BOOL    transport_write_block(transport_ctx *, uschar *, int, BOOL);
 502 extern void    transport_write_reset(int);
 503 extern BOOL    transport_write_string(int, const char *, ...);
 504 extern BOOL    transport_headers_send(transport_ctx *,
 505                  BOOL (*)(transport_ctx *, uschar *, int));
 506 extern void    transport_show_supported(FILE *);
 507 extern BOOL    transport_write_message(transport_ctx *, int);
 508 extern void    tree_add_duplicate(uschar *, address_item *);
 509 extern void    tree_add_nonrecipient(uschar *);
 510 extern void    tree_add_unusable(host_item *);
 511 extern int     tree_insertnode(tree_node **, tree_node *);
 512 extern tree_node *tree_search(tree_node *, const uschar *);
 513 extern void    tree_write(tree_node *, FILE *);
 514 extern void    tree_walk(tree_node *, void (*)(uschar*, uschar*, void*), void *);
 515
 516 #ifdef WITH_CONTENT_SCAN
 517 extern void    unspool_mbox(void);
 518 #endif
 519 #ifdef SUPPORT_I18N
 520 extern void    utf8_version_report(FILE *);
 521 #endif
 522
 523 extern int     verify_address(address_item *, FILE *, int, int, int, int,
 524                  uschar *, uschar *, BOOL *);
 525 extern int     verify_check_dnsbl(int, const uschar **, uschar **);
 526 extern int     verify_check_header_address(uschar **, uschar **, int, int, int,
 527                  uschar *, uschar *, int, int *);
 528 extern int     verify_check_headers(uschar **);
 529 extern int     verify_check_header_names_ascii(uschar **);
 530 extern int     verify_check_host(uschar **);
 531 extern int     verify_check_notblind(void);
 532 extern int     verify_check_given_host(uschar **, host_item *);
 533 extern int     verify_check_this_host(const uschar **, unsigned int *,
 534                  const uschar*, const uschar *, const uschar **);
 535 extern address_item *verify_checked_sender(uschar *);
 536 extern void    verify_get_ident(int);
 537 extern BOOL    verify_sender(int *, uschar **);
 538 extern BOOL    verify_sender_preliminary(int *, uschar **);
 539 extern void    version_init(void);
 540
 541 extern BOOL    write_chunk(transport_ctx *, uschar *, int);
 542 extern ssize_t write_to_fd_buf(int, const uschar *, size_t);
 543
 544
 545 /* vi: aw
 546 */
 547 /* End of functions.h */