src/src/functions.h

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2018 */
   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 SUPPORT_DANE
  50                 dns_answer *,
  51 # endif
  52                 uschar **);
  53 extern void    tls_close(BOOL, int);
  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 SUPPORT_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
  92 #ifdef EXPERIMENTAL_ARC
  93 extern void   *arc_ams_setup_sign_bodyhash(void);
  94 extern const uschar *arc_header_feed(gstring *, BOOL);
  95 extern gstring *arc_sign(const uschar *, gstring *, uschar **);
  96 extern void     arc_sign_init(void);
  97 extern const uschar *acl_verify_arc(void);
  98 #endif
  99
 100 extern void    assert_no_variables(void *, int, const char *, int);
 101 extern int     auth_call_pam(const uschar *, uschar **);
 102 extern int     auth_call_pwcheck(uschar *, uschar **);
 103 extern int     auth_call_radius(const uschar *, uschar **);
 104 extern int     auth_call_saslauthd(const uschar *, const uschar *,
 105                  const uschar *, const uschar *, uschar **);
 106 extern int     auth_check_serv_cond(auth_instance *);
 107 extern int     auth_check_some_cond(auth_instance *, uschar *, uschar *, int);
 108
 109
 110 extern int     auth_get_data(uschar **, uschar *, int);
 111 extern int     auth_get_no64_data(uschar **, uschar *);
 112 extern void    auth_show_supported(FILE *);
 113 extern uschar *auth_xtextencode(uschar *, int);
 114 extern int     auth_xtextdecode(uschar *, uschar **);
 115
 116 #ifdef EXPERIMENTAL_ARC
 117 extern gstring *authres_arc(gstring *);
 118 #endif
 119 #ifndef DISABLE_DKIM
 120 extern gstring *authres_dkim(gstring *);
 121 #endif
 122 #ifdef EXPERIMENTAL_DMARC
 123 extern gstring *authres_dmarc(gstring *);
 124 #endif
 125 extern gstring *authres_smtpauth(gstring *);
 126 #ifdef SUPPORT_SPF
 127 extern gstring *authres_spf(gstring *);
 128 #endif
 129
 130 extern uschar *b64encode(uschar *, int);
 131 extern int     b64decode(const uschar *, uschar **);
 132 extern int     bdat_getc(unsigned);
 133 extern uschar *bdat_getbuf(unsigned *);
 134 extern int     bdat_ungetc(int);
 135 extern void    bdat_flush_data(void);
 136
 137 extern void    bits_clear(unsigned int *, size_t, int *);
 138 extern void    bits_set(unsigned int *, size_t, int *);
 139
 140 extern void    cancel_cutthrough_connection(BOOL, const uschar *);
 141 extern int     check_host(void *, const uschar *, const uschar **, uschar **);
 142 extern uschar **child_exec_exim(int, BOOL, int *, BOOL, int, ...);
 143 extern pid_t   child_open_uid(const uschar **, const uschar **, int,
 144                  uid_t *, gid_t *, int *, int *, uschar *, BOOL);
 145 extern BOOL    cleanup_environment(void);
 146 extern void    cutthrough_data_puts(uschar *, int);
 147 extern void    cutthrough_data_put_nl(void);
 148 extern uschar *cutthrough_finaldot(void);
 149 extern BOOL    cutthrough_flush_send(void);
 150 extern BOOL    cutthrough_headers_send(void);
 151 extern BOOL    cutthrough_predata(void);
 152 extern void    release_cutthrough_connection(const uschar *);
 153
 154 extern void    daemon_go(void);
 155
 156 #ifdef EXPERIMENTAL_DCC
 157 extern int     dcc_process(uschar **);
 158 #endif
 159
 160 extern void    debug_logging_activate(uschar *, uschar *);
 161 extern void    debug_logging_stop(void);
 162 extern void    debug_print_argv(const uschar **);
 163 extern void    debug_print_ids(uschar *);
 164 extern void    debug_printf_indent(const char *, ...) PRINTF_FUNCTION(1,2);
 165 extern void    debug_print_string(uschar *);
 166 extern void    debug_print_tree(tree_node *);
 167 extern void    debug_vprintf(int, const char *, va_list);
 168 extern void    decode_bits(unsigned int *, size_t, int *,
 169                    uschar *, bit_table *, int, uschar *, int);
 170 extern address_item *deliver_make_addr(uschar *, BOOL);
 171 extern void    deliver_init(void);
 172 extern void    delivery_log(int, address_item *, int, uschar *);
 173 extern int     deliver_message(uschar *, BOOL, BOOL);
 174 extern void    deliver_msglog(const char *, ...) PRINTF_FUNCTION(1,2);
 175 extern void    deliver_set_expansions(address_item *);
 176 extern int     deliver_split_address(address_item *);
 177 extern void    deliver_succeeded(address_item *);
 178
 179 extern uschar *deliver_get_sender_address (uschar *id);
 180 extern void    delivery_re_exec(int);
 181
 182 extern BOOL    directory_make(const uschar *, const uschar *, int, BOOL);
 183 #ifndef DISABLE_DKIM
 184 extern uschar *dkim_exim_query_dns_txt(uschar *);
 185 extern void    dkim_exim_sign_init(void);
 186
 187 extern BOOL    dkim_transport_write_message(transport_ctx *,
 188                   struct ob_dkim *, const uschar ** errstr);
 189 #endif
 190 extern dns_address *dns_address_from_rr(dns_answer *, dns_record *);
 191 extern int     dns_basic_lookup(dns_answer *, const uschar *, int);
 192 extern void    dns_build_reverse(const uschar *, uschar *);
 193 extern void    dns_init(BOOL, BOOL, BOOL);
 194 extern BOOL    dns_is_aa(const dns_answer *);
 195 extern BOOL    dns_is_secure(const dns_answer *);
 196 extern int     dns_lookup(dns_answer *, const uschar *, int, const uschar **);
 197 extern void    dns_pattern_init(void);
 198 extern int     dns_special_lookup(dns_answer *, const uschar *, int, const uschar **);
 199 extern dns_record *dns_next_rr(const dns_answer *, dns_scan *, int);
 200 extern uschar *dns_text_type(int);
 201 extern void    dscp_list_to_stream(FILE *);
 202 extern BOOL    dscp_lookup(const uschar *, int, int *, int *, int *);
 203
 204 extern void    enq_end(uschar *);
 205 extern BOOL    enq_start(uschar *, unsigned);
 206 #ifndef DISABLE_EVENT
 207 extern uschar *event_raise(uschar *, const uschar *, uschar *);
 208 extern void    msg_event_raise(const uschar *, const address_item *);
 209 #endif
 210 extern const uschar * exim_errstr(int);
 211 extern void    exim_exit(int, const uschar *);
 212 extern void    exim_nullstd(void);
 213 extern void    exim_setugid(uid_t, gid_t, BOOL, uschar *);
 214 extern void    exim_wait_tick(struct timeval *, int);
 215 extern int     exp_bool(address_item *addr,
 216   uschar *mtype, uschar *mname, unsigned dgb_opt, uschar *oname, BOOL bvalue,
 217   uschar *svalue, BOOL *rvalue);
 218 extern BOOL    expand_check_condition(uschar *, uschar *, uschar *);
 219 extern uschar *expand_file_big_buffer(const uschar *);
 220 extern uschar *expand_string(uschar *); /* public, cannot make const */
 221 extern const uschar *expand_cstring(const uschar *); /* ... so use this one */
 222 extern uschar *expand_hide_passwords(uschar * );
 223 extern uschar *expand_string_copy(const uschar *);
 224 extern int_eximarith_t expand_string_integer(uschar *, BOOL);
 225 extern void    modify_variable(uschar *, void *);
 226
 227 extern BOOL    fd_ready(int, int);
 228
 229 extern int     filter_interpret(uschar *, int, address_item **, uschar **);
 230 extern BOOL    filter_personal(string_item *, BOOL);
 231 extern BOOL    filter_runtest(int, uschar *, BOOL, BOOL);
 232 extern BOOL    filter_system_interpret(address_item **, uschar **);
 233
 234 extern uschar * fn_hdrs_added(void);
 235
 236 extern void    gstring_reset_unused(gstring *);
 237
 238 extern void    header_add(int, const char *, ...);
 239 extern int     header_checkname(header_line *, BOOL);
 240 extern BOOL    header_match(uschar *, BOOL, BOOL, string_item *, int, ...);
 241 extern int     host_address_extract_port(uschar *);
 242 extern uschar *host_and_ident(BOOL);
 243 extern int     host_aton(const uschar *, int *);
 244 extern void    host_build_hostlist(host_item **, const uschar *, BOOL);
 245 extern ip_address_item *host_build_ifacelist(const uschar *, uschar *);
 246 extern void    host_build_log_info(void);
 247 extern void    host_build_sender_fullhost(void);
 248 extern int     host_find_byname(host_item *, const uschar *, int,
 249                                 const uschar **, BOOL);
 250 extern int     host_find_bydns(host_item *, const uschar *, int, uschar *, uschar *,
 251                  uschar *, const dnssec_domains *, const uschar **, BOOL *);
 252 extern ip_address_item *host_find_interfaces(void);
 253 extern BOOL    host_is_in_net(const uschar *, const uschar *, int);
 254 extern BOOL    host_is_tls_on_connect_port(int);
 255 extern int     host_item_get_port(host_item *);
 256 extern void    host_mask(int, int *, int);
 257 extern int     host_name_lookup(void);
 258 extern int     host_nmtoa(int, int *, int, uschar *, int);
 259 extern uschar *host_ntoa(int, const void *, uschar *, int *);
 260 extern int     host_scan_for_local_hosts(host_item *, host_item **, BOOL *);
 261
 262 extern uschar *imap_utf7_encode(uschar *, const uschar *,
 263                                  uschar, uschar *, uschar **);
 264
 265 extern void    invert_address(uschar *, uschar *);
 266 extern int     ip_addr(void *, int, const uschar *, int);
 267 extern int     ip_bind(int, int, uschar *, int);
 268 extern int     ip_connect(int, int, const uschar *, int, int, const blob *);
 269 extern int     ip_connectedsocket(int, const uschar *, int, int,
 270                  int, host_item *, uschar **, const blob *);
 271 extern int     ip_get_address_family(int);
 272 extern void    ip_keepalive(int, const uschar *, BOOL);
 273 extern int     ip_recv(int, uschar *, int, int);
 274 extern int     ip_socket(int, int);
 275
 276 extern int     ip_tcpsocket(const uschar *, uschar **, int);
 277 extern int     ip_unixsocket(const uschar *, uschar **);
 278 extern int     ip_streamsocket(const uschar *, uschar **, int);
 279
 280 extern int     ipv6_nmtoa(int *, uschar *);
 281
 282 extern uschar *local_part_quote(uschar *);
 283 extern int     log_create(uschar *);
 284 extern int     log_create_as_exim(uschar *);
 285 extern void    log_close_all(void);
 286
 287 extern macro_item * macro_create(const uschar *, const uschar *, BOOL);
 288 extern BOOL    macro_read_assignment(uschar *);
 289 extern uschar *macros_expand(int, int *, BOOL *);
 290 extern void    mainlog_close(void);
 291 #ifdef WITH_CONTENT_SCAN
 292 extern int     malware(const uschar *, int);
 293 extern int     malware_in_file(uschar *);
 294 extern void    malware_init(void);
 295 extern void    malware_show_supported(FILE *);
 296 #endif
 297 extern int     match_address_list(const uschar *, BOOL, BOOL, const uschar **,
 298                  unsigned int *, int, int, const uschar **);
 299 extern int     match_address_list_basic(const uschar *, const uschar **, int);
 300 extern int     match_check_list(const uschar **, int, tree_node **, unsigned int **,
 301                  int(*)(void *, const uschar *, const uschar **, uschar **), void *, int,
 302                  const uschar *, const uschar **);
 303 extern int     match_isinlist(const uschar *, const uschar **, int, tree_node **,
 304                  unsigned int *, int, BOOL, const uschar **);
 305 extern int     match_check_string(const uschar *, const uschar *, int, BOOL, BOOL, BOOL,
 306                  const uschar **);
 307 extern void    md5_end(md5 *, const uschar *, int, uschar *);
 308 extern void    md5_mid(md5 *, const uschar *);
 309 extern void    md5_start(md5 *);
 310 extern void    millisleep(int);
 311 #ifdef WITH_CONTENT_SCAN
 312 struct mime_boundary_context;
 313 extern int     mime_acl_check(uschar *acl, FILE *f,
 314                  struct mime_boundary_context *, uschar **, uschar **);
 315 extern int     mime_decode(const uschar **);
 316 extern ssize_t mime_decode_base64(FILE *, FILE *, uschar *);
 317 extern int     mime_regex(const uschar **);
 318 extern void    mime_set_anomaly(int);
 319 #endif
 320 extern uschar *moan_check_errorcopy(uschar *);
 321 extern BOOL    moan_skipped_syntax_errors(uschar *, error_block *, uschar *,
 322                  BOOL, uschar *);
 323 extern void    moan_smtp_batch(uschar *, const char *, ...) PRINTF_FUNCTION(2,3);
 324 extern void    moan_tell_someone(uschar *, address_item *,
 325                  const uschar *, const char *, ...) PRINTF_FUNCTION(4,5);
 326 extern BOOL    moan_to_sender(int, error_block *, header_line *, FILE *, BOOL);
 327 extern void    moan_write_from(FILE *);
 328 extern FILE   *modefopen(const uschar *, const char *, mode_t);
 329
 330 extern int     open_cutthrough_connection( address_item * addr );
 331
 332 extern uschar *parse_extract_address(uschar *, uschar **, int *, int *, int *,
 333                  BOOL);
 334 extern int     parse_forward_list(uschar *, int, address_item **, uschar **,
 335                  const uschar *, uschar *, error_block **);
 336 extern uschar *parse_find_address_end(uschar *, BOOL);
 337 extern uschar *parse_find_at(uschar *);
 338 extern const uschar *parse_fix_phrase(const uschar *, int, uschar *, int);
 339 extern uschar *parse_message_id(uschar *, uschar **, uschar **);
 340 extern const uschar *parse_quote_2047(const uschar *, int, uschar *, uschar *, int, BOOL);
 341 extern uschar *parse_date_time(uschar *str, time_t *t);
 342 extern int     vaguely_random_number(int);
 343 #ifdef SUPPORT_TLS
 344 extern int     vaguely_random_number_fallback(int);
 345 #endif
 346
 347 extern BOOL    queue_action(uschar *, int, uschar **, int, int);
 348 extern void    queue_check_only(void);
 349 extern void    queue_list(int, uschar **, int);
 350 extern void    queue_count(void);
 351 extern void    queue_run(uschar *, uschar *, BOOL);
 352
 353 extern int     random_number(int);
 354 extern int     rda_interpret(redirect_block *, int, uschar *, uschar *,
 355                  uschar *, uschar *, uschar *, ugid_block *, address_item **,
 356                  uschar **, error_block **, int *, uschar *);
 357 extern int     rda_is_filter(const uschar *);
 358 extern BOOL    readconf_depends(driver_instance *, uschar *);
 359 extern void    readconf_driver_init(uschar *, driver_instance **,
 360                  driver_info *, int, void *, int, optionlist *, int);
 361 extern uschar *readconf_find_option(void *);
 362 extern void    readconf_main(BOOL);
 363 extern void    readconf_options_from_list(optionlist *, unsigned, const uschar *, uschar *);
 364 extern BOOL    readconf_print(uschar *, uschar *, BOOL);
 365 extern uschar *readconf_printtime(int);
 366 extern uschar *readconf_readname(uschar *, int, uschar *);
 367 extern int     readconf_readtime(const uschar *, int, BOOL);
 368 extern void    readconf_rest(void);
 369 extern uschar *readconf_retry_error(const uschar *, const uschar *, int *, int *);
 370 extern void    readconf_save_config(const uschar *);
 371 extern void    read_message_body(BOOL);
 372 extern void    receive_bomb_out(uschar *, uschar *);
 373 extern BOOL    receive_check_fs(int);
 374 extern BOOL    receive_check_set_sender(uschar *);
 375 extern BOOL    receive_msg(BOOL);
 376 extern int     receive_statvfs(BOOL, int *);
 377 extern void    receive_swallow_smtp(void);
 378 #ifdef WITH_CONTENT_SCAN
 379 extern int     regex(const uschar **);
 380 #endif
 381 extern BOOL    regex_match_and_setup(const pcre *, const uschar *, int, int);
 382 extern const pcre *regex_must_compile(const uschar *, BOOL, BOOL);
 383 extern void    retry_add_item(address_item *, uschar *, int);
 384 extern BOOL    retry_check_address(const uschar *, host_item *, uschar *, BOOL,
 385                  uschar **, uschar **);
 386 extern retry_config *retry_find_config(const uschar *, const uschar *, int, int);
 387 extern BOOL    retry_ultimate_address_timeout(uschar *, const uschar *,
 388                  dbdata_retry *, time_t);
 389 extern void    retry_update(address_item **, address_item **, address_item **);
 390 extern uschar *rewrite_address(uschar *, BOOL, BOOL, rewrite_rule *, int);
 391 extern uschar *rewrite_address_qualify(uschar *, BOOL);
 392 extern header_line *rewrite_header(header_line *,
 393                const uschar *, const uschar *,
 394                rewrite_rule *, int, BOOL);
 395 extern uschar *rewrite_one(uschar *, int, BOOL *, BOOL, uschar *,
 396                  rewrite_rule *);
 397 extern void    rewrite_test(uschar *);
 398 extern uschar *rfc2047_decode2(uschar *, BOOL, uschar *, int, int *, int *,
 399                  uschar **);
 400 extern int     route_address(address_item *, address_item **, address_item **,
 401                  address_item **, address_item **, int);
 402 extern int     route_check_prefix(const uschar *, const uschar *);
 403 extern int     route_check_suffix(const uschar *, const uschar *);
 404 extern BOOL    route_findgroup(uschar *, gid_t *);
 405 extern BOOL    route_finduser(const uschar *, struct passwd **, uid_t *);
 406 extern BOOL    route_find_expanded_group(uschar *, uschar *, uschar *, gid_t *,
 407                  uschar **);
 408 extern BOOL    route_find_expanded_user(uschar *, uschar *, uschar *,
 409                  struct passwd **, uid_t *, uschar **);
 410 extern void    route_init(void);
 411 extern void    route_show_supported(FILE *);
 412 extern void    route_tidyup(void);
 413
 414 extern uschar *search_find(void *, uschar *, uschar *, int, const uschar *, int,
 415                  int, int *);
 416 extern int     search_findtype(const uschar *, int);
 417 extern int     search_findtype_partial(const uschar *, int *, const uschar **, int *,
 418                  int *);
 419 extern void   *search_open(uschar *, int, int, uid_t *, gid_t *);
 420 extern void    search_tidyup(void);
 421 extern void    set_process_info(const char *, ...) PRINTF_FUNCTION(1,2);
 422 extern void    sha1_end(hctx *, const uschar *, int, uschar *);
 423 extern void    sha1_mid(hctx *, const uschar *);
 424 extern void    sha1_start(hctx *);
 425 extern int     sieve_interpret(uschar *, int, uschar *, uschar *, uschar *,
 426                  uschar *, address_item **, uschar **);
 427 extern void    sigalrm_handler(int);
 428 extern BOOL    smtp_buffered(void);
 429 extern void    smtp_closedown(uschar *);
 430 extern void    smtp_command_timeout_exit(void);
 431 extern void    smtp_command_sigterm_exit(void);
 432 extern void    smtp_data_timeout_exit(void);
 433 extern void    smtp_data_sigint_exit(void);
 434 extern uschar *smtp_cmd_hist(void);
 435 extern int     smtp_connect(host_item *, int, uschar *, int,
 436                  transport_instance *);
 437 extern int     smtp_sock_connect(host_item *, int, int, uschar *,
 438                  transport_instance * tb, int, const blob *);
 439 extern int     smtp_feof(void);
 440 extern int     smtp_ferror(void);
 441 extern uschar *smtp_get_connection_info(void);
 442 extern BOOL    smtp_get_interface(uschar *, int, address_item *,
 443                  uschar **, uschar *);
 444 extern BOOL    smtp_get_port(uschar *, address_item *, int *, uschar *);
 445 extern int     smtp_getc(unsigned);
 446 extern uschar *smtp_getbuf(unsigned *);
 447 extern void    smtp_get_cache(void);
 448 extern int     smtp_handle_acl_fail(int, int, uschar *, uschar *);
 449 extern void    smtp_log_no_mail(void);
 450 extern void    smtp_message_code(uschar **, int *, uschar **, uschar **, BOOL);
 451 extern void    smtp_proxy_tls(uschar *, size_t, int *, int);
 452 extern BOOL    smtp_read_response(smtp_inblock *, uschar *, int, int, int);
 453 extern void    smtp_reset(void *);
 454 extern void    smtp_respond(uschar *, int, BOOL, uschar *);
 455 extern void    smtp_notquit_exit(uschar *, uschar *, uschar *, ...);
 456 extern void    smtp_port_for_connect(host_item *, int);
 457 extern void    smtp_send_prohibition_message(int, uschar *);
 458 extern int     smtp_setup_msg(void);
 459 extern BOOL    smtp_start_session(void);
 460 extern int     smtp_ungetc(int);
 461 extern BOOL    smtp_verify_helo(void);
 462 extern int     smtp_write_command(smtp_outblock *, int, const char *, ...) PRINTF_FUNCTION(3,4);
 463 #ifdef WITH_CONTENT_SCAN
 464 extern int     spam(const uschar **);
 465 extern FILE   *spool_mbox(unsigned long *, const uschar *, uschar **);
 466 #endif
 467 extern void    spool_clear_header_globals(void);
 468 extern uschar *spool_dname(const uschar *, uschar *);
 469 extern uschar *spool_fname(const uschar *, const uschar *, const uschar *, const uschar *);
 470 extern BOOL    spool_move_message(uschar *, uschar *, uschar *, uschar *);
 471 extern int     spool_open_datafile(uschar *);
 472 extern int     spool_open_temp(uschar *);
 473 extern int     spool_read_header(uschar *, BOOL, BOOL);
 474 extern uschar *spool_sname(const uschar *, uschar *);
 475 extern int     spool_write_header(uschar *, int, uschar **);
 476 extern int     stdin_getc(unsigned);
 477 extern int     stdin_feof(void);
 478 extern int     stdin_ferror(void);
 479 extern int     stdin_ungetc(int);
 480 extern gstring *string_append(gstring *, int, ...) WARN_UNUSED_RESULT;
 481 extern gstring *string_append_listele(gstring *, uschar, const uschar *) WARN_UNUSED_RESULT;
 482 extern gstring *string_append_listele_n(gstring *, uschar, const uschar *, unsigned) WARN_UNUSED_RESULT;
 483 extern uschar *string_base62(unsigned long int);
 484 extern gstring *string_cat (gstring *, const uschar *     ) WARN_UNUSED_RESULT;
 485 extern gstring *string_catn(gstring *, const uschar *, int) WARN_UNUSED_RESULT;
 486 extern int     string_compare_by_pointer(const void *, const void *);
 487 extern uschar *string_copy_dnsdomain(uschar *);
 488 extern uschar *string_copy_malloc(const uschar *);
 489 extern uschar *string_copylc(const uschar *);
 490 extern uschar *string_copynlc(uschar *, int);
 491 extern uschar *string_dequote(const uschar **);
 492 extern BOOL    string_format(uschar *, int, const char *, ...) ALMOST_PRINTF(3,4);
 493 extern uschar *string_format_size(int, uschar *);
 494 extern uschar *string_from_gstring(gstring *);
 495 extern gstring *string_get(unsigned);
 496 extern int     string_interpret_escape(const uschar **);
 497 extern int     string_is_ip_address(const uschar *, int *);
 498 #ifdef SUPPORT_I18N
 499 extern BOOL    string_is_utf8(const uschar *);
 500 #endif
 501 extern uschar *string_nextinlist(const uschar **, int *, uschar *, int);
 502 extern uschar *string_open_failed(int, const char *, ...) PRINTF_FUNCTION(2,3);
 503 extern const uschar *string_printing2(const uschar *, BOOL);
 504 extern uschar *string_split_message(uschar *);
 505 extern uschar *string_timediff(struct timeval *);
 506 extern uschar *string_timesince(struct timeval *);
 507 extern uschar *string_unprinting(uschar *);
 508 #ifdef SUPPORT_I18N
 509 extern uschar *string_address_utf8_to_alabel(const uschar *, uschar **);
 510 extern uschar *string_domain_alabel_to_utf8(const uschar *, uschar **);
 511 extern uschar *string_domain_utf8_to_alabel(const uschar *, uschar **);
 512 extern uschar *string_localpart_alabel_to_utf8(const uschar *, uschar **);
 513 extern uschar *string_localpart_utf8_to_alabel(const uschar *, uschar **);
 514 #endif
 515 extern BOOL    string_vformat(uschar *, int, const char *, va_list);
 516 extern int     strcmpic(const uschar *, const uschar *);
 517 extern int     strncmpic(const uschar *, const uschar *, int);
 518 extern uschar *strstric(uschar *, uschar *, BOOL);
 519
 520 #ifdef EXIM_TFO_PROBE
 521 extern void    tfo_probe(void);
 522 #endif
 523 extern void    timesince(struct timeval * diff, struct timeval * then);
 524 extern void    tls_modify_variables(tls_support *);
 525 extern uschar *tod_stamp(int);
 526
 527 extern BOOL    transport_check_waiting(const uschar *, const uschar *, int, uschar *,
 528                  BOOL *, oicf, void*);
 529 extern void    transport_init(void);
 530 extern void    transport_do_pass_socket(const uschar *, const uschar *,
 531                  const uschar *, uschar *, int);
 532 extern BOOL    transport_pass_socket(const uschar *, const uschar *, const uschar *, uschar *,
 533                  int);
 534 extern uschar *transport_rcpt_address(address_item *, BOOL);
 535 extern BOOL    transport_set_up_command(const uschar ***, uschar *,
 536                  BOOL, int, address_item *, uschar *, uschar **);
 537 extern void    transport_update_waiting(host_item *, uschar *);
 538 extern BOOL    transport_write_block(transport_ctx *, uschar *, int, BOOL);
 539 extern void    transport_write_reset(int);
 540 extern BOOL    transport_write_string(int, const char *, ...);
 541 extern BOOL    transport_headers_send(transport_ctx *,
 542                  BOOL (*)(transport_ctx *, uschar *, int));
 543 extern void    transport_show_supported(FILE *);
 544 extern BOOL    transport_write_message(transport_ctx *, int);
 545 extern void    tree_add_duplicate(uschar *, address_item *);
 546 extern void    tree_add_nonrecipient(uschar *);
 547 extern void    tree_add_unusable(host_item *);
 548 extern int     tree_insertnode(tree_node **, tree_node *);
 549 extern tree_node *tree_search(tree_node *, const uschar *);
 550 extern void    tree_write(tree_node *, FILE *);
 551 extern void    tree_walk(tree_node *, void (*)(uschar*, uschar*, void*), void *);
 552
 553 #ifdef WITH_CONTENT_SCAN
 554 extern void    unspool_mbox(void);
 555 #endif
 556 #ifdef SUPPORT_I18N
 557 extern void    utf8_version_report(FILE *);
 558 #endif
 559
 560 extern int     verify_address(address_item *, FILE *, int, int, int, int,
 561                  uschar *, uschar *, BOOL *);
 562 extern int     verify_check_dnsbl(int, const uschar **, uschar **);
 563 extern int     verify_check_header_address(uschar **, uschar **, int, int, int,
 564                  uschar *, uschar *, int, int *);
 565 extern int     verify_check_headers(uschar **);
 566 extern int     verify_check_header_names_ascii(uschar **);
 567 extern int     verify_check_host(uschar **);
 568 extern int     verify_check_notblind(void);
 569 extern int     verify_check_given_host(uschar **, host_item *);
 570 extern int     verify_check_this_host(const uschar **, unsigned int *,
 571                  const uschar*, const uschar *, const uschar **);
 572 extern address_item *verify_checked_sender(uschar *);
 573 extern void    verify_get_ident(int);
 574 extern BOOL    verify_sender(int *, uschar **);
 575 extern BOOL    verify_sender_preliminary(int *, uschar **);
 576 extern void    version_init(void);
 577
 578 extern BOOL    write_chunk(transport_ctx *, uschar *, int);
 579 extern ssize_t write_to_fd_buf(int, const uschar *, size_t);
 580
 581
 582 /* vi: aw
 583 */
 584 /* End of functions.h */