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