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 #ifndef _FUNCTIONS_H_
  14 #define _FUNCTIONS_H_
  15
  16
  17 #ifdef EXIM_PERL
  18 extern gstring *call_perl_cat(gstring *, uschar **, uschar *,
  19                  uschar **) WARN_UNUSED_RESULT;
  20 extern void    cleanup_perl(void);
  21 extern uschar *init_perl(uschar *);
  22 #endif
  23
  24
  25 #ifdef SUPPORT_TLS
  26 extern const char *
  27                std_dh_prime_default(void);
  28 extern const char *
  29                std_dh_prime_named(const uschar *);
  30
  31 extern uschar * tls_cert_crl_uri(void *, uschar * mod);
  32 extern uschar * tls_cert_ext_by_oid(void *, uschar *, int);
  33 extern uschar * tls_cert_issuer(void *, uschar * mod);
  34 extern uschar * tls_cert_not_before(void *, uschar * mod);
  35 extern uschar * tls_cert_not_after(void *, uschar * mod);
  36 extern uschar * tls_cert_ocsp_uri(void *, uschar * mod);
  37 extern uschar * tls_cert_serial_number(void *, uschar * mod);
  38 extern uschar * tls_cert_signature(void *, uschar * mod);
  39 extern uschar * tls_cert_signature_algorithm(void *, uschar * mod);
  40 extern uschar * tls_cert_subject(void *, uschar * mod);
  41 extern uschar * tls_cert_subject_altname(void *, uschar * mod);
  42 extern uschar * tls_cert_version(void *, uschar * mod);
  43
  44 extern uschar * tls_cert_der_b64(void * cert);
  45 extern uschar * tls_cert_fprt_md5(void *);
  46 extern uschar * tls_cert_fprt_sha1(void *);
  47 extern uschar * tls_cert_fprt_sha256(void *);
  48
  49 extern BOOL    tls_client_start(client_conn_ctx *, smtp_connect_args *,
  50                   void *, tls_support *, uschar **);
  51
  52 extern void    tls_close(void *, int);
  53 extern BOOL    tls_could_read(void);
  54 extern int     tls_export_cert(uschar *, size_t, void *);
  55 extern int     tls_feof(void);
  56 extern int     tls_ferror(void);
  57 extern void    tls_free_cert(void **);
  58 extern int     tls_getc(unsigned);
  59 extern uschar *tls_getbuf(unsigned *);
  60 extern void    tls_get_cache(void);
  61 extern int     tls_import_cert(const uschar *, void **);
  62 extern int     tls_read(void *, uschar *, size_t);
  63 extern int     tls_server_start(const uschar *, uschar **);
  64 extern BOOL    tls_smtp_buffered(void);
  65 extern int     tls_ungetc(int);
  66 extern int     tls_write(void *, const uschar *, size_t, BOOL);
  67 extern uschar *tls_validate_require_cipher(void);
  68 extern void    tls_version_report(FILE *);
  69 # ifndef USE_GNUTLS
  70 extern BOOL    tls_openssl_options_parse(uschar *, long *);
  71 # endif
  72 extern uschar * tls_field_from_dn(uschar *, const uschar *);
  73 extern BOOL    tls_is_name_for_cert(const uschar *, void *);
  74
  75 # ifdef SUPPORT_DANE
  76 extern int     tlsa_lookup(const host_item *, dns_answer *, BOOL);
  77 # endif
  78
  79 #endif  /*SUPPORT_TLS*/
  80
  81
  82 /* Everything else... */
  83
  84 extern acl_block *acl_read(uschar *(*)(void), uschar **);
  85 extern int     acl_check(int, uschar *, uschar *, uschar **, uschar **);
  86 extern int     acl_eval(int, uschar *, uschar **, uschar **);
  87
  88 extern tree_node *acl_var_create(uschar *);
  89 extern void    acl_var_write(uschar *, uschar *, void *);
  90
  91 #ifdef EXPERIMENTAL_ARC
  92 extern void   *arc_ams_setup_sign_bodyhash(void);
  93 extern const uschar *arc_header_feed(gstring *, BOOL);
  94 extern gstring *arc_sign(const uschar *, gstring *, uschar **);
  95 extern void     arc_sign_init(void);
  96 extern const uschar *acl_verify_arc(void);
  97 extern uschar * fn_arc_domains(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 extern int     auth_client_item(void *, auth_instance *, const uschar **,
 109                  unsigned, int, uschar *, int);
 110
 111
 112 extern int     auth_get_data(uschar **, const uschar *, int);
 113 extern int     auth_get_no64_data(uschar **, uschar *);
 114 extern int     auth_prompt(const uschar *);
 115 extern int     auth_read_input(const uschar *);
 116 extern void    auth_show_supported(FILE *);
 117 extern uschar *auth_xtextencode(uschar *, int);
 118 extern int     auth_xtextdecode(uschar *, uschar **);
 119
 120 #ifdef EXPERIMENTAL_ARC
 121 extern gstring *authres_arc(gstring *);
 122 #endif
 123 #ifndef DISABLE_DKIM
 124 extern gstring *authres_dkim(gstring *);
 125 #endif
 126 #ifdef EXPERIMENTAL_DMARC
 127 extern gstring *authres_dmarc(gstring *);
 128 #endif
 129 extern gstring *authres_smtpauth(gstring *);
 130 #ifdef SUPPORT_SPF
 131 extern gstring *authres_spf(gstring *);
 132 #endif
 133
 134 extern uschar *b64encode(const uschar *, int);
 135 extern int     b64decode(const uschar *, uschar **);
 136 extern int     bdat_getc(unsigned);
 137 extern uschar *bdat_getbuf(unsigned *);
 138 extern int     bdat_ungetc(int);
 139 extern void    bdat_flush_data(void);
 140
 141 extern void    bits_clear(unsigned int *, size_t, int *);
 142 extern void    bits_set(unsigned int *, size_t, int *);
 143
 144 extern void    cancel_cutthrough_connection(BOOL, const uschar *);
 145 extern int     check_host(void *, const uschar *, const uschar **, uschar **);
 146 extern uschar **child_exec_exim(int, BOOL, int *, BOOL, int, ...);
 147 extern pid_t   child_open_uid(const uschar **, const uschar **, int,
 148                  uid_t *, gid_t *, int *, int *, uschar *, BOOL);
 149 extern BOOL    cleanup_environment(void);
 150 extern void    cutthrough_data_puts(uschar *, int);
 151 extern void    cutthrough_data_put_nl(void);
 152 extern uschar *cutthrough_finaldot(void);
 153 extern BOOL    cutthrough_flush_send(void);
 154 extern BOOL    cutthrough_headers_send(void);
 155 extern BOOL    cutthrough_predata(void);
 156 extern void    release_cutthrough_connection(const uschar *);
 157
 158 extern void    daemon_go(void);
 159
 160 #ifdef EXPERIMENTAL_DCC
 161 extern int     dcc_process(uschar **);
 162 #endif
 163
 164 extern void    debug_logging_activate(uschar *, uschar *);
 165 extern void    debug_logging_stop(void);
 166 extern void    debug_print_argv(const uschar **);
 167 extern void    debug_print_ids(uschar *);
 168 extern void    debug_printf_indent(const char *, ...) PRINTF_FUNCTION(1,2);
 169 extern void    debug_print_string(uschar *);
 170 extern void    debug_print_tree(tree_node *);
 171 extern void    debug_vprintf(int, const char *, va_list);
 172 extern void    decode_bits(unsigned int *, size_t, int *,
 173                    uschar *, bit_table *, int, uschar *, int);
 174 extern address_item *deliver_make_addr(uschar *, BOOL);
 175 extern void    deliver_init(void);
 176 extern void    delivery_log(int, address_item *, int, uschar *);
 177 extern int     deliver_message(uschar *, BOOL, BOOL);
 178 extern void    deliver_msglog(const char *, ...) PRINTF_FUNCTION(1,2);
 179 extern void    deliver_set_expansions(address_item *);
 180 extern int     deliver_split_address(address_item *);
 181 extern void    deliver_succeeded(address_item *);
 182
 183 extern uschar *deliver_get_sender_address (uschar *id);
 184 extern void    delivery_re_exec(int);
 185
 186 extern BOOL    directory_make(const uschar *, const uschar *, int, BOOL);
 187 #ifndef DISABLE_DKIM
 188 extern uschar *dkim_exim_query_dns_txt(uschar *);
 189 extern void    dkim_exim_sign_init(void);
 190
 191 extern BOOL    dkim_transport_write_message(transport_ctx *,
 192                   struct ob_dkim *, const uschar ** errstr);
 193 #endif
 194 extern dns_address *dns_address_from_rr(dns_answer *, dns_record *);
 195 extern int     dns_basic_lookup(dns_answer *, const uschar *, int);
 196 extern void    dns_build_reverse(const uschar *, uschar *);
 197 extern void    dns_init(BOOL, BOOL, BOOL);
 198 extern BOOL    dns_is_aa(const dns_answer *);
 199 extern BOOL    dns_is_secure(const dns_answer *);
 200 extern int     dns_lookup(dns_answer *, const uschar *, int, const uschar **);
 201 extern void    dns_pattern_init(void);
 202 extern int     dns_special_lookup(dns_answer *, const uschar *, int, const uschar **);
 203 extern dns_record *dns_next_rr(const dns_answer *, dns_scan *, int);
 204 extern uschar *dns_text_type(int);
 205 extern void    dscp_list_to_stream(FILE *);
 206 extern BOOL    dscp_lookup(const uschar *, int, int *, int *, int *);
 207
 208 extern void    enq_end(uschar *);
 209 extern BOOL    enq_start(uschar *, unsigned);
 210 #ifndef DISABLE_EVENT
 211 extern uschar *event_raise(uschar *, const uschar *, uschar *);
 212 extern void    msg_event_raise(const uschar *, const address_item *);
 213 #endif
 214
 215 extern int     exim_chown_failure(int, const uschar*, uid_t, gid_t);
 216 extern const uschar * exim_errstr(int);
 217 extern void    exim_exit(int, const uschar *);
 218 extern void    exim_nullstd(void);
 219 extern void    exim_setugid(uid_t, gid_t, BOOL, uschar *);
 220 extern void    exim_wait_tick(struct timeval *, int);
 221 extern int     exp_bool(address_item *addr,
 222   uschar *mtype, uschar *mname, unsigned dgb_opt, uschar *oname, BOOL bvalue,
 223   uschar *svalue, BOOL *rvalue);
 224 extern BOOL    expand_check_condition(uschar *, uschar *, uschar *);
 225 extern uschar *expand_file_big_buffer(const uschar *);
 226 extern uschar *expand_string(uschar *); /* public, cannot make const */
 227 extern const uschar *expand_cstring(const uschar *); /* ... so use this one */
 228 extern uschar *expand_hide_passwords(uschar * );
 229 extern uschar *expand_string_copy(const uschar *);
 230 extern int_eximarith_t expand_string_integer(uschar *, BOOL);
 231 extern void    modify_variable(uschar *, void *);
 232
 233 extern BOOL    fd_ready(int, int);
 234
 235 extern int     filter_interpret(uschar *, int, address_item **, uschar **);
 236 extern BOOL    filter_personal(string_item *, BOOL);
 237 extern BOOL    filter_runtest(int, uschar *, BOOL, BOOL);
 238 extern BOOL    filter_system_interpret(address_item **, uschar **);
 239
 240 extern uschar * fn_hdrs_added(void);
 241
 242 extern void    gstring_reset_unused(gstring *);
 243
 244 extern void    header_add(int, const char *, ...);
 245 extern header_line *header_add_at_position_internal(BOOL, uschar *, BOOL, int, const char *, ...);
 246 extern int     header_checkname(header_line *, BOOL);
 247 extern BOOL    header_match(uschar *, BOOL, BOOL, string_item *, int, ...);
 248 extern int     host_address_extract_port(uschar *);
 249 extern uschar *host_and_ident(BOOL);
 250 extern int     host_aton(const uschar *, int *);
 251 extern void    host_build_hostlist(host_item **, const uschar *, BOOL);
 252 extern ip_address_item *host_build_ifacelist(const uschar *, uschar *);
 253 extern void    host_build_log_info(void);
 254 extern void    host_build_sender_fullhost(void);
 255 extern int     host_find_byname(host_item *, const uschar *, int,
 256                                 const uschar **, BOOL);
 257 extern int     host_find_bydns(host_item *, const uschar *, int, uschar *, uschar *,
 258                  uschar *, const dnssec_domains *, const uschar **, BOOL *);
 259 extern ip_address_item *host_find_interfaces(void);
 260 extern BOOL    host_is_in_net(const uschar *, const uschar *, int);
 261 extern BOOL    host_is_tls_on_connect_port(int);
 262 extern int     host_item_get_port(host_item *);
 263 extern void    host_mask(int, int *, int);
 264 extern int     host_name_lookup(void);
 265 extern int     host_nmtoa(int, int *, int, uschar *, int);
 266 extern uschar *host_ntoa(int, const void *, uschar *, int *);
 267 extern int     host_scan_for_local_hosts(host_item *, host_item **, BOOL *);
 268
 269 extern uschar *imap_utf7_encode(uschar *, const uschar *,
 270                                  uschar, uschar *, uschar **);
 271
 272 extern void    invert_address(uschar *, uschar *);
 273 extern int     ip_addr(void *, int, const uschar *, int);
 274 extern int     ip_bind(int, int, uschar *, int);
 275 extern int     ip_connect(int, int, const uschar *, int, int, const blob *);
 276 extern int     ip_connectedsocket(int, const uschar *, int, int,
 277                  int, host_item *, uschar **, const blob *);
 278 extern int     ip_get_address_family(int);
 279 extern void    ip_keepalive(int, const uschar *, BOOL);
 280 extern int     ip_recv(client_conn_ctx *, uschar *, int, int);
 281 extern int     ip_socket(int, int);
 282
 283 extern int     ip_tcpsocket(const uschar *, uschar **, int);
 284 extern int     ip_unixsocket(const uschar *, uschar **);
 285 extern int     ip_streamsocket(const uschar *, uschar **, int);
 286
 287 extern int     ipv6_nmtoa(int *, uschar *);
 288
 289 extern uschar *local_part_quote(uschar *);
 290 extern int     log_create(uschar *);
 291 extern int     log_create_as_exim(uschar *);
 292 extern void    log_close_all(void);
 293
 294 extern macro_item * macro_create(const uschar *, const uschar *, BOOL);
 295 extern BOOL    macro_read_assignment(uschar *);
 296 extern uschar *macros_expand(int, int *, BOOL *);
 297 extern void    mainlog_close(void);
 298 #ifdef WITH_CONTENT_SCAN
 299 extern int     malware(const uschar *, int);
 300 extern int     malware_in_file(uschar *);
 301 extern void    malware_init(void);
 302 extern void    malware_show_supported(FILE *);
 303 #endif
 304 extern int     match_address_list(const uschar *, BOOL, BOOL, const uschar **,
 305                  unsigned int *, int, int, const uschar **);
 306 extern int     match_address_list_basic(const uschar *, const uschar **, int);
 307 extern int     match_check_list(const uschar **, int, tree_node **, unsigned int **,
 308                  int(*)(void *, const uschar *, const uschar **, uschar **), void *, int,
 309                  const uschar *, const uschar **);
 310 extern int     match_isinlist(const uschar *, const uschar **, int, tree_node **,
 311                  unsigned int *, int, BOOL, const uschar **);
 312 extern int     match_check_string(const uschar *, const uschar *, int, BOOL, BOOL, BOOL,
 313                  const uschar **);
 314 extern void    md5_end(md5 *, const uschar *, int, uschar *);
 315 extern void    md5_mid(md5 *, const uschar *);
 316 extern void    md5_start(md5 *);
 317 extern void    millisleep(int);
 318 #ifdef WITH_CONTENT_SCAN
 319 struct mime_boundary_context;
 320 extern int     mime_acl_check(uschar *acl, FILE *f,
 321                  struct mime_boundary_context *, uschar **, uschar **);
 322 extern int     mime_decode(const uschar **);
 323 extern ssize_t mime_decode_base64(FILE *, FILE *, uschar *);
 324 extern int     mime_regex(const uschar **);
 325 extern void    mime_set_anomaly(int);
 326 #endif
 327 extern uschar *moan_check_errorcopy(uschar *);
 328 extern BOOL    moan_skipped_syntax_errors(uschar *, error_block *, uschar *,
 329                  BOOL, uschar *);
 330 extern void    moan_smtp_batch(uschar *, const char *, ...) PRINTF_FUNCTION(2,3);
 331 extern BOOL    moan_send_message(uschar *, int, error_block *eblock,
 332                  header_line *, FILE *, uschar *);
 333 extern void    moan_tell_someone(uschar *, address_item *,
 334                  const uschar *, const char *, ...) PRINTF_FUNCTION(4,5);
 335 extern BOOL    moan_to_sender(int, error_block *, header_line *, FILE *, BOOL);
 336 extern void    moan_write_from(FILE *);
 337 extern FILE   *modefopen(const uschar *, const char *, mode_t);
 338
 339 extern int     open_cutthrough_connection( address_item * addr );
 340
 341 extern uschar *parse_extract_address(uschar *, uschar **, int *, int *, int *,
 342                  BOOL);
 343 extern int     parse_forward_list(uschar *, int, address_item **, uschar **,
 344                  const uschar *, uschar *, error_block **);
 345 extern uschar *parse_find_address_end(uschar *, BOOL);
 346 extern uschar *parse_find_at(uschar *);
 347 extern const uschar *parse_fix_phrase(const uschar *, int, uschar *, int);
 348 extern uschar *parse_message_id(uschar *, uschar **, uschar **);
 349 extern const uschar *parse_quote_2047(const uschar *, int, uschar *, uschar *, int, BOOL);
 350 extern uschar *parse_date_time(uschar *str, time_t *t);
 351 extern int     vaguely_random_number(int);
 352 #ifdef SUPPORT_TLS
 353 extern int     vaguely_random_number_fallback(int);
 354 #endif
 355
 356 extern BOOL    queue_action(uschar *, int, uschar **, int, int);
 357 extern void    queue_check_only(void);
 358 extern void    queue_list(int, uschar **, int);
 359 extern void    queue_count(void);
 360 extern void    queue_run(uschar *, uschar *, BOOL);
 361
 362 extern int     random_number(int);
 363 extern const uschar *rc_to_string(int);
 364 extern int     rda_interpret(redirect_block *, int, uschar *, uschar *,
 365                  uschar *, uschar *, uschar *, ugid_block *, address_item **,
 366                  uschar **, error_block **, int *, uschar *);
 367 extern int     rda_is_filter(const uschar *);
 368 extern BOOL    readconf_depends(driver_instance *, uschar *);
 369 extern void    readconf_driver_init(uschar *, driver_instance **,
 370                  driver_info *, int, void *, int, optionlist *, int);
 371 extern uschar *readconf_find_option(void *);
 372 extern void    readconf_main(BOOL);
 373 extern void    readconf_options_from_list(optionlist *, unsigned, const uschar *, uschar *);
 374 extern BOOL    readconf_print(uschar *, uschar *, BOOL);
 375 extern uschar *readconf_printtime(int);
 376 extern uschar *readconf_readname(uschar *, int, uschar *);
 377 extern int     readconf_readtime(const uschar *, int, BOOL);
 378 extern void    readconf_rest(void);
 379 extern uschar *readconf_retry_error(const uschar *, const uschar *, int *, int *);
 380 extern void    readconf_save_config(const uschar *);
 381 extern void    read_message_body(BOOL);
 382 extern void    receive_bomb_out(uschar *, uschar *);
 383 extern BOOL    receive_check_fs(int);
 384 extern BOOL    receive_check_set_sender(uschar *);
 385 extern BOOL    receive_msg(BOOL);
 386 extern int_eximarith_t receive_statvfs(BOOL, int *);
 387 extern void    receive_swallow_smtp(void);
 388 #ifdef WITH_CONTENT_SCAN
 389 extern int     regex(const uschar **);
 390 #endif
 391 extern BOOL    regex_match_and_setup(const pcre *, const uschar *, int, int);
 392 extern const pcre *regex_must_compile(const uschar *, BOOL, BOOL);
 393 extern void    retry_add_item(address_item *, uschar *, int);
 394 extern BOOL    retry_check_address(const uschar *, host_item *, uschar *, BOOL,
 395                  uschar **, uschar **);
 396 extern retry_config *retry_find_config(const uschar *, const uschar *, int, int);
 397 extern BOOL    retry_ultimate_address_timeout(uschar *, const uschar *,
 398                  dbdata_retry *, time_t);
 399 extern void    retry_update(address_item **, address_item **, address_item **);
 400 extern uschar *rewrite_address(uschar *, BOOL, BOOL, rewrite_rule *, int);
 401 extern uschar *rewrite_address_qualify(uschar *, BOOL);
 402 extern header_line *rewrite_header(header_line *,
 403                const uschar *, const uschar *,
 404                rewrite_rule *, int, BOOL);
 405 extern uschar *rewrite_one(uschar *, int, BOOL *, BOOL, uschar *,
 406                  rewrite_rule *);
 407 extern void    rewrite_test(uschar *);
 408 extern uschar *rfc2047_decode2(uschar *, BOOL, uschar *, int, int *, int *,
 409                  uschar **);
 410 extern int     route_address(address_item *, address_item **, address_item **,
 411                  address_item **, address_item **, int);
 412 extern int     route_check_prefix(const uschar *, const uschar *);
 413 extern int     route_check_suffix(const uschar *, const uschar *);
 414 extern BOOL    route_findgroup(uschar *, gid_t *);
 415 extern BOOL    route_finduser(const uschar *, struct passwd **, uid_t *);
 416 extern BOOL    route_find_expanded_group(uschar *, uschar *, uschar *, gid_t *,
 417                  uschar **);
 418 extern BOOL    route_find_expanded_user(uschar *, uschar *, uschar *,
 419                  struct passwd **, uid_t *, uschar **);
 420 extern void    route_init(void);
 421 extern void    route_show_supported(FILE *);
 422 extern void    route_tidyup(void);
 423
 424 extern uschar *search_find(void *, uschar *, uschar *, int, const uschar *, int,
 425                  int, int *);
 426 extern int     search_findtype(const uschar *, int);
 427 extern int     search_findtype_partial(const uschar *, int *, const uschar **, int *,
 428                  int *);
 429 extern void   *search_open(uschar *, int, int, uid_t *, gid_t *);
 430 extern void    search_tidyup(void);
 431 extern void    set_process_info(const char *, ...) PRINTF_FUNCTION(1,2);
 432 extern void    sha1_end(hctx *, const uschar *, int, uschar *);
 433 extern void    sha1_mid(hctx *, const uschar *);
 434 extern void    sha1_start(hctx *);
 435 extern int     sieve_interpret(uschar *, int, uschar *, uschar *, uschar *,
 436                  uschar *, address_item **, uschar **);
 437 extern void    sigalrm_handler(int);
 438 extern BOOL    smtp_buffered(void);
 439 extern void    smtp_closedown(uschar *);
 440 extern void    smtp_command_timeout_exit(void);
 441 extern void    smtp_command_sigterm_exit(void);
 442 extern void    smtp_data_timeout_exit(void);
 443 extern void    smtp_data_sigint_exit(void);
 444 extern uschar *smtp_cmd_hist(void);
 445 extern int     smtp_connect(smtp_connect_args *, const blob *);
 446 extern int     smtp_sock_connect(host_item *, int, int, uschar *,
 447                  transport_instance * tb, int, const blob *);
 448 extern int     smtp_feof(void);
 449 extern int     smtp_ferror(void);
 450 extern uschar *smtp_get_connection_info(void);
 451 extern BOOL    smtp_get_interface(uschar *, int, address_item *,
 452                  uschar **, uschar *);
 453 extern BOOL    smtp_get_port(uschar *, address_item *, int *, uschar *);
 454 extern int     smtp_getc(unsigned);
 455 extern uschar *smtp_getbuf(unsigned *);
 456 extern void    smtp_get_cache(void);
 457 extern int     smtp_handle_acl_fail(int, int, uschar *, uschar *);
 458 extern void    smtp_log_no_mail(void);
 459 extern void    smtp_message_code(uschar **, int *, uschar **, uschar **, BOOL);
 460 extern void    smtp_proxy_tls(void *, uschar *, size_t, int *, int);
 461 extern BOOL    smtp_read_response(void *, uschar *, int, int, int);
 462 extern void    smtp_reset(void *);
 463 extern void    smtp_respond(uschar *, int, BOOL, uschar *);
 464 extern void    smtp_notquit_exit(uschar *, uschar *, uschar *, ...);
 465 extern void    smtp_port_for_connect(host_item *, int);
 466 extern void    smtp_send_prohibition_message(int, uschar *);
 467 extern int     smtp_setup_msg(void);
 468 extern BOOL    smtp_start_session(void);
 469 extern int     smtp_ungetc(int);
 470 extern BOOL    smtp_verify_helo(void);
 471 extern int     smtp_write_command(void *, int, const char *, ...) PRINTF_FUNCTION(3,4);
 472 #ifdef WITH_CONTENT_SCAN
 473 extern int     spam(const uschar **);
 474 extern FILE   *spool_mbox(unsigned long *, const uschar *, uschar **);
 475 #endif
 476 extern void    spool_clear_header_globals(void);
 477 extern uschar *spool_dname(const uschar *, uschar *);
 478 extern uschar *spool_fname(const uschar *, const uschar *, const uschar *, const uschar *);
 479 extern BOOL    spool_move_message(uschar *, uschar *, uschar *, uschar *);
 480 extern int     spool_open_datafile(uschar *);
 481 extern int     spool_open_temp(uschar *);
 482 extern int     spool_read_header(uschar *, BOOL, BOOL);
 483 extern uschar *spool_sname(const uschar *, uschar *);
 484 extern int     spool_write_header(uschar *, int, uschar **);
 485 extern int     stdin_getc(unsigned);
 486 extern int     stdin_feof(void);
 487 extern int     stdin_ferror(void);
 488 extern int     stdin_ungetc(int);
 489 extern gstring *string_append(gstring *, int, ...) WARN_UNUSED_RESULT;
 490 extern gstring *string_append_listele(gstring *, uschar, const uschar *) WARN_UNUSED_RESULT;
 491 extern gstring *string_append_listele_n(gstring *, uschar, const uschar *, unsigned) WARN_UNUSED_RESULT;
 492 extern gstring *string_append2_listele_n(gstring *, const uschar *, const uschar *, unsigned) WARN_UNUSED_RESULT;
 493 extern uschar *string_base62(unsigned long int);
 494 extern gstring *string_cat (gstring *, const uschar *     ) WARN_UNUSED_RESULT;
 495 extern gstring *string_catn(gstring *, const uschar *, int) WARN_UNUSED_RESULT;
 496 extern int     string_compare_by_pointer(const void *, const void *);
 497 extern uschar *string_copy_dnsdomain(uschar *);
 498 extern uschar *string_copy_malloc(const uschar *);
 499 extern uschar *string_copylc(const uschar *);
 500 extern uschar *string_copynlc(uschar *, int);
 501 extern uschar *string_dequote(const uschar **);
 502 extern gstring *string_fmt_append(gstring *, const char *, ...) ALMOST_PRINTF(2,3);
 503 extern BOOL    string_format(uschar *, int, const char *, ...) ALMOST_PRINTF(3,4);
 504 extern uschar *string_format_size(int, uschar *);
 505 extern uschar *string_from_gstring(gstring *);
 506 extern gstring *string_get(unsigned);
 507 extern int     string_interpret_escape(const uschar **);
 508 extern int     string_is_ip_address(const uschar *, int *);
 509 #ifdef SUPPORT_I18N
 510 extern BOOL    string_is_utf8(const uschar *);
 511 #endif
 512 extern uschar *string_nextinlist(const uschar **, int *, uschar *, int);
 513 extern uschar *string_open_failed(int, const char *, ...) PRINTF_FUNCTION(2,3);
 514 extern const uschar *string_printing2(const uschar *, BOOL);
 515 extern uschar *string_split_message(uschar *);
 516 extern uschar *string_timediff(struct timeval *);
 517 extern uschar *string_timesince(struct timeval *);
 518 extern uschar *string_unprinting(uschar *);
 519 #ifdef SUPPORT_I18N
 520 extern uschar *string_address_utf8_to_alabel(const uschar *, uschar **);
 521 extern uschar *string_domain_alabel_to_utf8(const uschar *, uschar **);
 522 extern uschar *string_domain_utf8_to_alabel(const uschar *, uschar **);
 523 extern uschar *string_localpart_alabel_to_utf8(const uschar *, uschar **);
 524 extern uschar *string_localpart_utf8_to_alabel(const uschar *, uschar **);
 525 #endif
 526 extern gstring *string_vformat(gstring *, BOOL, const char *, va_list);
 527 extern int     strcmpic(const uschar *, const uschar *);
 528 extern int     strncmpic(const uschar *, const uschar *, int);
 529 extern uschar *strstric(uschar *, uschar *, BOOL);
 530
 531 #ifdef EXIM_TFO_PROBE
 532 extern void    tfo_probe(void);
 533 #endif
 534 extern void    timesince(struct timeval * diff, struct timeval * then);
 535 extern void    tls_modify_variables(tls_support *);
 536 extern uschar *tod_stamp(int);
 537
 538 extern BOOL    transport_check_waiting(const uschar *, const uschar *, int, uschar *,
 539                  BOOL *, oicf, void*);
 540 extern void    transport_init(void);
 541 extern void    transport_do_pass_socket(const uschar *, const uschar *,
 542                  const uschar *, uschar *, int);
 543 extern BOOL    transport_pass_socket(const uschar *, const uschar *, const uschar *, uschar *,
 544                  int);
 545 extern uschar *transport_rcpt_address(address_item *, BOOL);
 546 extern BOOL    transport_set_up_command(const uschar ***, uschar *,
 547                  BOOL, int, address_item *, uschar *, uschar **);
 548 extern void    transport_update_waiting(host_item *, uschar *);
 549 extern BOOL    transport_write_block(transport_ctx *, uschar *, int, BOOL);
 550 extern void    transport_write_reset(int);
 551 extern BOOL    transport_write_string(int, const char *, ...);
 552 extern BOOL    transport_headers_send(transport_ctx *,
 553                  BOOL (*)(transport_ctx *, uschar *, int));
 554 extern void    transport_show_supported(FILE *);
 555 extern BOOL    transport_write_message(transport_ctx *, int);
 556 extern void    tree_add_duplicate(uschar *, address_item *);
 557 extern void    tree_add_nonrecipient(uschar *);
 558 extern void    tree_add_unusable(host_item *);
 559 extern int     tree_insertnode(tree_node **, tree_node *);
 560 extern tree_node *tree_search(tree_node *, const uschar *);
 561 extern void    tree_write(tree_node *, FILE *);
 562 extern void    tree_walk(tree_node *, void (*)(uschar*, uschar*, void*), void *);
 563
 564 #ifdef WITH_CONTENT_SCAN
 565 extern void    unspool_mbox(void);
 566 #endif
 567 #ifdef SUPPORT_I18N
 568 extern void    utf8_version_report(FILE *);
 569 #endif
 570
 571 extern int     verify_address(address_item *, FILE *, int, int, int, int,
 572                  uschar *, uschar *, BOOL *);
 573 extern int     verify_check_dnsbl(int, const uschar **, uschar **);
 574 extern int     verify_check_header_address(uschar **, uschar **, int, int, int,
 575                  uschar *, uschar *, int, int *);
 576 extern int     verify_check_headers(uschar **);
 577 extern int     verify_check_header_names_ascii(uschar **);
 578 extern int     verify_check_host(uschar **);
 579 extern int     verify_check_notblind(BOOL);
 580 extern int     verify_check_given_host(const uschar **, const host_item *);
 581 extern int     verify_check_this_host(const uschar **, unsigned int *,
 582                  const uschar*, const uschar *, const uschar **);
 583 extern address_item *verify_checked_sender(uschar *);
 584 extern void    verify_get_ident(int);
 585 extern BOOL    verify_sender(int *, uschar **);
 586 extern BOOL    verify_sender_preliminary(int *, uschar **);
 587 extern void    version_init(void);
 588
 589 extern BOOL    write_chunk(transport_ctx *, uschar *, int);
 590 extern ssize_t write_to_fd_buf(int, const uschar *, size_t);
 591
 592
 593 #if !defined(MACRO_PREDEF) && !defined(COMPILE_UTILITY)
 594 /* exim_chown - in some NFSv4 setups *seemes* to be an issue with
 595 chown(<exim-uid>, <exim-gid>).
 596
 597 Probably because the idmapping is broken, misconfigured or set up in
 598 an unusal way. (see Bug 2931). As I'm not sure, if this was a single
 599 case of misconfiguration, or if there are more such broken systems
 600 out, I try to impose as least impact as possible and for now just write
 601 a panic log entry pointing to the bug report. You're encouraged to
 602 contact the developers, if you experience this issue.
 603
 604 fd     the file descriptor (or -1 if not valid)
 605 name   the file name for error messages or for file operations,
 606   if fd is < 0
 607 owner  the owner
 608 group  the group
 609
 610 returns 0 on success, -1 on failure */
 611
 612 static inline int
 613 exim_fchown(int fd, uid_t owner, gid_t group, const uschar *name)
 614 {
 615 return fchown(fd, owner, group)
 616   ? exim_chown_failure(fd, name, owner, group) : 0;
 617 }
 618
 619 static inline int
 620 exim_chown(const uschar *name, uid_t owner, gid_t group)
 621 {
 622 return chown(CCS name, owner, group)
 623   ? exim_chown_failure(-1, name, owner, group) : 0;
 624 }
 625 #endif  /* !MACRO_PREDEF */
 626
 627 #endif  /* _FUNCTIONS_H_ */
 628
 629 /* vi: aw
 630 */
 631 /* End of functions.h */