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 #ifndef DISABLE_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 void    tls_daemon_init(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(void *, 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(void *, const uschar *, size_t, BOOL);
  68 extern uschar *tls_validate_require_cipher(void);
  69 extern void    tls_version_report(FILE *);
  70 # ifdef USE_OPENSSL
  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  /*DISABLE_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 extern uschar * fn_arc_domains(void);
  99 #endif
 100
 101 extern void    assert_no_variables(void *, int, const char *, int);
 102 extern int     auth_call_pam(const uschar *, uschar **);
 103 extern int     auth_call_pwcheck(uschar *, uschar **);
 104 extern int     auth_call_radius(const uschar *, uschar **);
 105 extern int     auth_call_saslauthd(const uschar *, const uschar *,
 106                  const uschar *, const uschar *, uschar **);
 107 extern int     auth_check_serv_cond(auth_instance *);
 108 extern int     auth_check_some_cond(auth_instance *, uschar *, uschar *, int);
 109 extern int     auth_client_item(void *, auth_instance *, const uschar **,
 110                  unsigned, int, uschar *, int);
 111
 112
 113 extern int     auth_get_data(uschar **, const uschar *, int);
 114 extern int     auth_get_no64_data(uschar **, uschar *);
 115 extern int     auth_prompt(const uschar *);
 116 extern int     auth_read_input(const uschar *);
 117 extern void    auth_show_supported(FILE *);
 118 extern uschar *auth_xtextencode(uschar *, int);
 119 extern int     auth_xtextdecode(uschar *, uschar **);
 120
 121 #ifdef EXPERIMENTAL_ARC
 122 extern gstring *authres_arc(gstring *);
 123 #endif
 124 #ifndef DISABLE_DKIM
 125 extern gstring *authres_dkim(gstring *);
 126 #endif
 127 #ifdef EXPERIMENTAL_DMARC
 128 extern gstring *authres_dmarc(gstring *);
 129 #endif
 130 extern gstring *authres_smtpauth(gstring *);
 131 #ifdef SUPPORT_SPF
 132 extern gstring *authres_spf(gstring *);
 133 #endif
 134
 135 extern uschar *b64encode(const uschar *, int);
 136 extern int     b64decode(const uschar *, uschar **);
 137 extern int     bdat_getc(unsigned);
 138 extern uschar *bdat_getbuf(unsigned *);
 139 extern int     bdat_ungetc(int);
 140 extern void    bdat_flush_data(void);
 141
 142 extern void    bits_clear(unsigned int *, size_t, int *);
 143 extern void    bits_set(unsigned int *, size_t, int *);
 144
 145 extern void    cancel_cutthrough_connection(BOOL, const uschar *);
 146 extern int     check_host(void *, const uschar *, const uschar **, uschar **);
 147 extern uschar **child_exec_exim(int, BOOL, int *, BOOL, int, ...);
 148 extern pid_t   child_open_uid(const uschar **, const uschar **, int,
 149                  uid_t *, gid_t *, int *, int *, uschar *, BOOL);
 150 extern BOOL    cleanup_environment(void);
 151 extern void    cutthrough_data_puts(uschar *, int);
 152 extern void    cutthrough_data_put_nl(void);
 153 extern uschar *cutthrough_finaldot(void);
 154 extern BOOL    cutthrough_flush_send(void);
 155 extern BOOL    cutthrough_headers_send(void);
 156 extern BOOL    cutthrough_predata(void);
 157 extern void    release_cutthrough_connection(const uschar *);
 158
 159 extern void    daemon_go(void);
 160
 161 #ifdef EXPERIMENTAL_DCC
 162 extern int     dcc_process(uschar **);
 163 #endif
 164
 165 extern void    debug_logging_activate(uschar *, uschar *);
 166 extern void    debug_logging_stop(void);
 167 extern void    debug_print_argv(const uschar **);
 168 extern void    debug_print_ids(uschar *);
 169 extern void    debug_printf_indent(const char *, ...) PRINTF_FUNCTION(1,2);
 170 extern void    debug_print_string(uschar *);
 171 extern void    debug_print_tree(tree_node *);
 172 extern void    debug_vprintf(int, const char *, va_list);
 173 extern void    decode_bits(unsigned int *, size_t, int *,
 174                    uschar *, bit_table *, int, uschar *, int);
 175 extern address_item *deliver_make_addr(uschar *, BOOL);
 176 extern void    deliver_init(void);
 177 extern void    delivery_log(int, address_item *, int, uschar *);
 178 extern int     deliver_message(uschar *, BOOL, BOOL);
 179 extern void    deliver_msglog(const char *, ...) PRINTF_FUNCTION(1,2);
 180 extern void    deliver_set_expansions(address_item *);
 181 extern int     deliver_split_address(address_item *);
 182 extern void    deliver_succeeded(address_item *);
 183
 184 extern uschar *deliver_get_sender_address (uschar *id);
 185 extern void    delivery_re_exec(int);
 186
 187 extern BOOL    directory_make(const uschar *, const uschar *, int, BOOL);
 188 #ifndef DISABLE_DKIM
 189 extern uschar *dkim_exim_query_dns_txt(uschar *);
 190 extern void    dkim_exim_sign_init(void);
 191
 192 extern BOOL    dkim_transport_write_message(transport_ctx *,
 193                   struct ob_dkim *, const uschar ** errstr);
 194 #endif
 195 extern dns_address *dns_address_from_rr(dns_answer *, dns_record *);
 196 extern int     dns_basic_lookup(dns_answer *, const uschar *, int);
 197 extern void    dns_build_reverse(const uschar *, uschar *);
 198 extern void    dns_init(BOOL, BOOL, BOOL);
 199 extern BOOL    dns_is_aa(const dns_answer *);
 200 extern BOOL    dns_is_secure(const dns_answer *);
 201 extern int     dns_lookup(dns_answer *, const uschar *, int, const uschar **);
 202 extern void    dns_pattern_init(void);
 203 extern int     dns_special_lookup(dns_answer *, const uschar *, int, const uschar **);
 204 extern dns_record *dns_next_rr(const dns_answer *, dns_scan *, int);
 205 extern uschar *dns_text_type(int);
 206 extern void    dscp_list_to_stream(FILE *);
 207 extern BOOL    dscp_lookup(const uschar *, int, int *, int *, int *);
 208
 209 extern void    enq_end(uschar *);
 210 extern BOOL    enq_start(uschar *, unsigned);
 211 #ifndef DISABLE_EVENT
 212 extern uschar *event_raise(uschar *, const uschar *, uschar *);
 213 extern void    msg_event_raise(const uschar *, const address_item *);
 214 #endif
 215
 216 extern int     exim_chown_failure(int, const uschar*, uid_t, gid_t);
 217 extern const uschar * exim_errstr(int);
 218 extern void    exim_exit(int, const uschar *) NORETURN;
 219 extern void    exim_nullstd(void);
 220 extern void    exim_setugid(uid_t, gid_t, BOOL, uschar *);
 221 extern void    exim_wait_tick(struct timeval *, int);
 222 extern int     exp_bool(address_item *addr,
 223   uschar *mtype, uschar *mname, unsigned dgb_opt, uschar *oname, BOOL bvalue,
 224   uschar *svalue, BOOL *rvalue);
 225 extern BOOL    expand_check_condition(uschar *, uschar *, uschar *);
 226 extern uschar *expand_file_big_buffer(const uschar *);
 227 extern uschar *expand_string(uschar *); /* public, cannot make const */
 228 extern const uschar *expand_cstring(const uschar *); /* ... so use this one */
 229 extern uschar *expand_hide_passwords(uschar * );
 230 extern uschar *expand_string_copy(const uschar *);
 231 extern int_eximarith_t expand_string_integer(uschar *, BOOL);
 232 extern void    modify_variable(uschar *, void *);
 233
 234 extern BOOL    fd_ready(int, time_t);
 235
 236 extern int     filter_interpret(uschar *, int, address_item **, uschar **);
 237 extern BOOL    filter_personal(string_item *, BOOL);
 238 extern BOOL    filter_runtest(int, uschar *, BOOL, BOOL);
 239 extern BOOL    filter_system_interpret(address_item **, uschar **);
 240
 241 extern uschar * fn_hdrs_added(void);
 242
 243 extern void    header_add(int, const char *, ...);
 244 extern header_line *header_add_at_position_internal(BOOL, uschar *, BOOL, int, const char *, ...);
 245 extern int     header_checkname(header_line *, BOOL);
 246 extern BOOL    header_match(uschar *, BOOL, BOOL, string_item *, int, ...);
 247 extern int     host_address_extract_port(uschar *);
 248 extern uschar *host_and_ident(BOOL);
 249 extern int     host_aton(const uschar *, int *);
 250 extern void    host_build_hostlist(host_item **, const uschar *, BOOL);
 251 extern ip_address_item *host_build_ifacelist(const uschar *, uschar *);
 252 extern void    host_build_log_info(void);
 253 extern void    host_build_sender_fullhost(void);
 254 extern int     host_find_byname(host_item *, const uschar *, int,
 255                                 const uschar **, BOOL);
 256 extern int     host_find_bydns(host_item *, const uschar *, int, uschar *, uschar *,
 257                  uschar *, const dnssec_domains *, const uschar **, BOOL *);
 258 extern ip_address_item *host_find_interfaces(void);
 259 extern BOOL    host_is_in_net(const uschar *, const uschar *, int);
 260 extern BOOL    host_is_tls_on_connect_port(int);
 261 extern int     host_item_get_port(host_item *);
 262 extern void    host_mask(int, int *, int);
 263 extern int     host_name_lookup(void);
 264 extern int     host_nmtoa(int, int *, int, uschar *, int);
 265 extern uschar *host_ntoa(int, const void *, uschar *, int *);
 266 extern int     host_scan_for_local_hosts(host_item *, host_item **, BOOL *);
 267
 268 extern uschar *imap_utf7_encode(uschar *, const uschar *,
 269                                  uschar, uschar *, uschar **);
 270
 271 extern void    invert_address(uschar *, uschar *);
 272 extern int     ip_addr(void *, int, const uschar *, int);
 273 extern int     ip_bind(int, int, uschar *, int);
 274 extern int     ip_connect(int, int, const uschar *, int, int, const blob *);
 275 extern int     ip_connectedsocket(int, const uschar *, int, int,
 276                  int, host_item *, uschar **, const blob *);
 277 extern int     ip_get_address_family(int);
 278 extern void    ip_keepalive(int, const uschar *, BOOL);
 279 extern int     ip_recv(client_conn_ctx *, uschar *, int, time_t);
 280 extern int     ip_socket(int, int);
 281
 282 extern int     ip_tcpsocket(const uschar *, uschar **, int);
 283 extern int     ip_unixsocket(const uschar *, uschar **);
 284 extern int     ip_streamsocket(const uschar *, uschar **, int);
 285
 286 extern int     ipv6_nmtoa(int *, uschar *);
 287
 288 extern uschar *local_part_quote(uschar *);
 289 extern int     log_create(uschar *);
 290 extern int     log_create_as_exim(uschar *);
 291 extern void    log_close_all(void);
 292
 293 extern macro_item * macro_create(const uschar *, const uschar *, BOOL);
 294 extern BOOL    macro_read_assignment(uschar *);
 295 extern uschar *macros_expand(int, int *, BOOL *);
 296 extern void    mainlog_close(void);
 297 #ifdef WITH_CONTENT_SCAN
 298 extern int     malware(const uschar *, int);
 299 extern int     malware_in_file(uschar *);
 300 extern void    malware_init(void);
 301 extern void    malware_show_supported(FILE *);
 302 #endif
 303 extern int     match_address_list(const uschar *, BOOL, BOOL, const uschar **,
 304                  unsigned int *, int, int, const uschar **);
 305 extern int     match_address_list_basic(const uschar *, const uschar **, int);
 306 extern int     match_check_list(const uschar **, int, tree_node **, unsigned int **,
 307                  int(*)(void *, const uschar *, const uschar **, uschar **), void *, int,
 308                  const uschar *, const uschar **);
 309 extern int     match_isinlist(const uschar *, const uschar **, int, tree_node **,
 310                  unsigned int *, int, BOOL, const uschar **);
 311 extern int     match_check_string(const uschar *, const uschar *, int, BOOL, BOOL, BOOL,
 312                  const uschar **);
 313 extern void    md5_end(md5 *, const uschar *, int, uschar *);
 314 extern void    md5_mid(md5 *, const uschar *);
 315 extern void    md5_start(md5 *);
 316 extern void    millisleep(int);
 317 #ifdef WITH_CONTENT_SCAN
 318 struct mime_boundary_context;
 319 extern int     mime_acl_check(uschar *acl, FILE *f,
 320                  struct mime_boundary_context *, uschar **, uschar **);
 321 extern int     mime_decode(const uschar **);
 322 extern ssize_t mime_decode_base64(FILE *, FILE *, uschar *);
 323 extern int     mime_regex(const uschar **);
 324 extern void    mime_set_anomaly(int);
 325 #endif
 326 extern uschar *moan_check_errorcopy(uschar *);
 327 extern BOOL    moan_skipped_syntax_errors(uschar *, error_block *, uschar *,
 328                  BOOL, uschar *);
 329 extern void    moan_smtp_batch(uschar *, const char *, ...) PRINTF_FUNCTION(2,3);
 330 extern BOOL    moan_send_message(uschar *, int, error_block *eblock,
 331                  header_line *, FILE *, uschar *);
 332 extern void    moan_tell_someone(uschar *, address_item *,
 333                  const uschar *, const char *, ...) PRINTF_FUNCTION(4,5);
 334 extern BOOL    moan_to_sender(int, error_block *, header_line *, FILE *, BOOL);
 335 extern void    moan_write_from(FILE *);
 336 extern FILE   *modefopen(const uschar *, const char *, mode_t);
 337
 338 extern int     open_cutthrough_connection( address_item * addr );
 339
 340 extern uschar *parse_extract_address(uschar *, uschar **, int *, int *, int *,
 341                  BOOL);
 342 extern int     parse_forward_list(uschar *, int, address_item **, uschar **,
 343                  const uschar *, uschar *, error_block **);
 344 extern uschar *parse_find_address_end(uschar *, BOOL);
 345 extern uschar *parse_find_at(uschar *);
 346 extern const uschar *parse_fix_phrase(const uschar *, int, uschar *, int);
 347 extern uschar *parse_message_id(uschar *, uschar **, uschar **);
 348 extern const uschar *parse_quote_2047(const uschar *, int, uschar *, uschar *, int, BOOL);
 349 extern uschar *parse_date_time(uschar *str, time_t *t);
 350 extern int     vaguely_random_number(int);
 351 #ifndef DISABLE_TLS
 352 extern int     vaguely_random_number_fallback(int);
 353 #endif
 354
 355 extern BOOL    queue_action(uschar *, int, uschar **, int, int);
 356 extern void    queue_check_only(void);
 357 extern void    queue_list(int, uschar **, int);
 358 extern void    queue_count(void);
 359 extern void    queue_run(uschar *, uschar *, BOOL);
 360
 361 extern int     random_number(int);
 362 extern const uschar *rc_to_string(int);
 363 extern int     rda_interpret(redirect_block *, int, uschar *, uschar *,
 364                  uschar *, uschar *, uschar *, ugid_block *, address_item **,
 365                  uschar **, error_block **, int *, uschar *);
 366 extern int     rda_is_filter(const uschar *);
 367 extern BOOL    readconf_depends(driver_instance *, uschar *);
 368 extern void    readconf_driver_init(uschar *, driver_instance **,
 369                  driver_info *, int, void *, int, optionlist *, int);
 370 extern uschar *readconf_find_option(void *);
 371 extern void    readconf_main(BOOL);
 372 extern void    readconf_options_from_list(optionlist *, unsigned, const uschar *, uschar *);
 373 extern BOOL    readconf_print(uschar *, uschar *, BOOL);
 374 extern uschar *readconf_printtime(int);
 375 extern uschar *readconf_readname(uschar *, int, uschar *);
 376 extern int     readconf_readtime(const uschar *, int, BOOL);
 377 extern void    readconf_rest(void);
 378 extern uschar *readconf_retry_error(const uschar *, const uschar *, int *, int *);
 379 extern void    readconf_save_config(const uschar *);
 380 extern void    read_message_body(BOOL);
 381 extern void    receive_bomb_out(uschar *, uschar *) NORETURN;
 382 extern BOOL    receive_check_fs(int);
 383 extern BOOL    receive_check_set_sender(uschar *);
 384 extern BOOL    receive_msg(BOOL);
 385 extern int_eximarith_t receive_statvfs(BOOL, int *);
 386 extern void    receive_swallow_smtp(void);
 387 #ifdef WITH_CONTENT_SCAN
 388 extern int     regex(const uschar **);
 389 #endif
 390 extern BOOL    regex_match_and_setup(const pcre *, const uschar *, int, int);
 391 extern const pcre *regex_must_compile(const uschar *, BOOL, BOOL);
 392 extern void    retry_add_item(address_item *, uschar *, int);
 393 extern BOOL    retry_check_address(const uschar *, host_item *, uschar *, BOOL,
 394                  uschar **, uschar **);
 395 extern retry_config *retry_find_config(const uschar *, const uschar *, int, int);
 396 extern BOOL    retry_ultimate_address_timeout(uschar *, const uschar *,
 397                  dbdata_retry *, time_t);
 398 extern void    retry_update(address_item **, address_item **, address_item **);
 399 extern uschar *rewrite_address(uschar *, BOOL, BOOL, rewrite_rule *, int);
 400 extern uschar *rewrite_address_qualify(uschar *, BOOL);
 401 extern header_line *rewrite_header(header_line *,
 402                const uschar *, const uschar *,
 403                rewrite_rule *, int, BOOL);
 404 extern uschar *rewrite_one(uschar *, int, BOOL *, BOOL, uschar *,
 405                  rewrite_rule *);
 406 extern void    rewrite_test(uschar *);
 407 extern uschar *rfc2047_decode2(uschar *, BOOL, uschar *, int, int *, int *,
 408                  uschar **);
 409 extern int     route_address(address_item *, address_item **, address_item **,
 410                  address_item **, address_item **, int);
 411 extern int     route_check_prefix(const uschar *, const uschar *);
 412 extern int     route_check_suffix(const uschar *, const uschar *);
 413 extern BOOL    route_findgroup(uschar *, gid_t *);
 414 extern BOOL    route_finduser(const uschar *, struct passwd **, uid_t *);
 415 extern BOOL    route_find_expanded_group(uschar *, uschar *, uschar *, gid_t *,
 416                  uschar **);
 417 extern BOOL    route_find_expanded_user(uschar *, uschar *, uschar *,
 418                  struct passwd **, uid_t *, uschar **);
 419 extern void    route_init(void);
 420 extern void    route_show_supported(FILE *);
 421 extern void    route_tidyup(void);
 422
 423 extern uschar *search_find(void *, uschar *, uschar *, int, const uschar *, int,
 424                  int, int *);
 425 extern int     search_findtype(const uschar *, int);
 426 extern int     search_findtype_partial(const uschar *, int *, const uschar **, int *,
 427                  int *);
 428 extern void   *search_open(uschar *, int, int, uid_t *, gid_t *);
 429 extern void    search_tidyup(void);
 430 extern void    set_process_info(const char *, ...) PRINTF_FUNCTION(1,2);
 431 extern void    sha1_end(hctx *, const uschar *, int, uschar *);
 432 extern void    sha1_mid(hctx *, const uschar *);
 433 extern void    sha1_start(hctx *);
 434 extern int     sieve_interpret(uschar *, int, uschar *, uschar *, uschar *,
 435                  uschar *, address_item **, uschar **);
 436 extern void    sigalrm_handler(int);
 437 extern BOOL    smtp_buffered(void);
 438 extern void    smtp_closedown(uschar *);
 439 extern void    smtp_command_timeout_exit(void) NORETURN;
 440 extern void    smtp_command_sigterm_exit(void) NORETURN;
 441 extern void    smtp_data_timeout_exit(void) NORETURN;
 442 extern void    smtp_data_sigint_exit(void) NORETURN;
 443 extern uschar *smtp_cmd_hist(void);
 444 extern int     smtp_connect(smtp_connect_args *, const blob *);
 445 extern int     smtp_sock_connect(host_item *, int, int, uschar *,
 446                  transport_instance * tb, int, const blob *);
 447 extern int     smtp_feof(void);
 448 extern int     smtp_ferror(void);
 449 extern uschar *smtp_get_connection_info(void);
 450 extern BOOL    smtp_get_interface(uschar *, int, address_item *,
 451                  uschar **, uschar *);
 452 extern BOOL    smtp_get_port(uschar *, address_item *, int *, uschar *);
 453 extern int     smtp_getc(unsigned);
 454 extern uschar *smtp_getbuf(unsigned *);
 455 extern void    smtp_get_cache(void);
 456 extern int     smtp_handle_acl_fail(int, int, uschar *, uschar *);
 457 extern void    smtp_log_no_mail(void);
 458 extern void    smtp_message_code(uschar **, int *, uschar **, uschar **, BOOL);
 459 extern void    smtp_proxy_tls(void *, uschar *, size_t, int *, int) NORETURN;
 460 extern BOOL    smtp_read_response(void *, uschar *, int, int, int);
 461 extern void    smtp_reset(void *);
 462 extern void    smtp_respond(uschar *, int, BOOL, uschar *);
 463 extern void    smtp_notquit_exit(uschar *, uschar *, uschar *, ...);
 464 extern void    smtp_port_for_connect(host_item *, int);
 465 extern void    smtp_send_prohibition_message(int, uschar *);
 466 extern int     smtp_setup_msg(void);
 467 extern BOOL    smtp_start_session(void);
 468 extern int     smtp_ungetc(int);
 469 extern BOOL    smtp_verify_helo(void);
 470 extern int     smtp_write_command(void *, int, const char *, ...) PRINTF_FUNCTION(3,4);
 471 #ifdef WITH_CONTENT_SCAN
 472 extern int     spam(const uschar **);
 473 extern FILE   *spool_mbox(unsigned long *, const uschar *, uschar **);
 474 #endif
 475 extern void    spool_clear_header_globals(void);
 476 extern uschar *spool_dname(const uschar *, uschar *);
 477 extern uschar *spool_fname(const uschar *, const uschar *, const uschar *, const uschar *);
 478 extern BOOL    spool_move_message(uschar *, uschar *, uschar *, uschar *);
 479 extern int     spool_open_datafile(uschar *);
 480 extern int     spool_open_temp(uschar *);
 481 extern int     spool_read_header(uschar *, BOOL, BOOL);
 482 extern uschar *spool_sname(const uschar *, uschar *);
 483 extern int     spool_write_header(uschar *, int, uschar **);
 484 extern int     stdin_getc(unsigned);
 485 extern int     stdin_feof(void);
 486 extern int     stdin_ferror(void);
 487 extern int     stdin_ungetc(int);
 488 extern gstring *string_append(gstring *, int, ...) WARN_UNUSED_RESULT;
 489 extern gstring *string_append_listele(gstring *, uschar, const uschar *) WARN_UNUSED_RESULT;
 490 extern gstring *string_append_listele_n(gstring *, uschar, const uschar *, unsigned) WARN_UNUSED_RESULT;
 491 extern gstring *string_append2_listele_n(gstring *, const uschar *, const uschar *, unsigned) WARN_UNUSED_RESULT;
 492 extern uschar *string_base62(unsigned long int);
 493 extern gstring *string_cat (gstring *, const uschar *     ) WARN_UNUSED_RESULT;
 494 extern gstring *string_catn(gstring *, const uschar *, int) WARN_UNUSED_RESULT;
 495 extern int     string_compare_by_pointer(const void *, const void *);
 496 extern uschar *string_copy_dnsdomain(uschar *);
 497 extern uschar *string_copy_malloc(const uschar *);
 498 extern uschar *string_dequote(const uschar **);
 499 extern gstring *string_fmt_append(gstring *, const char *, ...) ALMOST_PRINTF(2,3);
 500 extern BOOL    string_format(uschar *, int, const char *, ...) ALMOST_PRINTF(3,4);
 501 extern uschar *string_format_size(int, uschar *);
 502 extern int     string_interpret_escape(const uschar **);
 503 extern int     string_is_ip_address(const uschar *, int *);
 504 #ifdef SUPPORT_I18N
 505 extern BOOL    string_is_utf8(const uschar *);
 506 #endif
 507 extern uschar *string_nextinlist(const uschar **, int *, uschar *, int);
 508 extern uschar *string_open_failed(int, const char *, ...) PRINTF_FUNCTION(2,3);
 509 extern const uschar *string_printing2(const uschar *, BOOL);
 510 extern uschar *string_split_message(uschar *);
 511 extern uschar *string_timediff(struct timeval *);
 512 extern uschar *string_timesince(struct timeval *);
 513 extern uschar *string_unprinting(uschar *);
 514 #ifdef SUPPORT_I18N
 515 extern uschar *string_address_utf8_to_alabel(const uschar *, uschar **);
 516 extern uschar *string_domain_alabel_to_utf8(const uschar *, uschar **);
 517 extern uschar *string_domain_utf8_to_alabel(const uschar *, uschar **);
 518 extern uschar *string_localpart_alabel_to_utf8(const uschar *, uschar **);
 519 extern uschar *string_localpart_utf8_to_alabel(const uschar *, uschar **);
 520 #endif
 521 extern gstring *string_vformat(gstring *, BOOL, const char *, va_list);
 522 extern int     strcmpic(const uschar *, const uschar *);
 523 extern int     strncmpic(const uschar *, const uschar *, int);
 524 extern uschar *strstric(uschar *, uschar *, BOOL);
 525
 526 #ifdef EXIM_TFO_PROBE
 527 extern void    tfo_probe(void);
 528 #endif
 529 extern void    timesince(struct timeval * diff, struct timeval * then);
 530 extern void    tls_modify_variables(tls_support *);
 531 extern uschar *tod_stamp(int);
 532
 533 extern BOOL    transport_check_waiting(const uschar *, const uschar *, int, uschar *,
 534                  BOOL *, oicf, void*);
 535 extern void    transport_init(void);
 536 extern void    transport_do_pass_socket(const uschar *, const uschar *,
 537                  const uschar *, uschar *, int);
 538 extern BOOL    transport_pass_socket(const uschar *, const uschar *, const uschar *, uschar *,
 539                  int);
 540 extern uschar *transport_rcpt_address(address_item *, BOOL);
 541 extern BOOL    transport_set_up_command(const uschar ***, uschar *,
 542                  BOOL, int, address_item *, uschar *, uschar **);
 543 extern void    transport_update_waiting(host_item *, uschar *);
 544 extern BOOL    transport_write_block(transport_ctx *, uschar *, int, BOOL);
 545 extern void    transport_write_reset(int);
 546 extern BOOL    transport_write_string(int, const char *, ...);
 547 extern BOOL    transport_headers_send(transport_ctx *,
 548                  BOOL (*)(transport_ctx *, uschar *, int));
 549 extern void    transport_show_supported(FILE *);
 550 extern BOOL    transport_write_message(transport_ctx *, int);
 551 extern void    tree_add_duplicate(uschar *, address_item *);
 552 extern void    tree_add_nonrecipient(uschar *);
 553 extern void    tree_add_unusable(host_item *);
 554 extern void    tree_dup(tree_node **, tree_node *);
 555 extern int     tree_insertnode(tree_node **, tree_node *);
 556 extern tree_node *tree_search(tree_node *, const uschar *);
 557 extern void    tree_write(tree_node *, FILE *);
 558 extern void    tree_walk(tree_node *, void (*)(uschar*, uschar*, void*), void *);
 559
 560 #ifdef WITH_CONTENT_SCAN
 561 extern void    unspool_mbox(void);
 562 #endif
 563 #ifdef SUPPORT_I18N
 564 extern void    utf8_version_report(FILE *);
 565 #endif
 566
 567 extern int     verify_address(address_item *, FILE *, int, int, int, int,
 568                  uschar *, uschar *, BOOL *);
 569 extern int     verify_check_dnsbl(int, const uschar **, uschar **);
 570 extern int     verify_check_header_address(uschar **, uschar **, int, int, int,
 571                  uschar *, uschar *, int, int *);
 572 extern int     verify_check_headers(uschar **);
 573 extern int     verify_check_header_names_ascii(uschar **);
 574 extern int     verify_check_host(uschar **);
 575 extern int     verify_check_notblind(BOOL);
 576 extern int     verify_check_given_host(const uschar **, const host_item *);
 577 extern int     verify_check_this_host(const uschar **, unsigned int *,
 578                  const uschar*, const uschar *, const uschar **);
 579 extern address_item *verify_checked_sender(uschar *);
 580 extern void    verify_get_ident(int);
 581 extern BOOL    verify_sender(int *, uschar **);
 582 extern BOOL    verify_sender_preliminary(int *, uschar **);
 583 extern void    version_init(void);
 584
 585 extern BOOL    write_chunk(transport_ctx *, uschar *, int);
 586 extern ssize_t write_to_fd_buf(int, const uschar *, size_t);
 587
 588
 589 #if !defined(MACRO_PREDEF) && !defined(COMPILE_UTILITY)
 590 /* exim_chown - in some NFSv4 setups *seemes* to be an issue with
 591 chown(<exim-uid>, <exim-gid>).
 592
 593 Probably because the idmapping is broken, misconfigured or set up in
 594 an unusal way. (see Bug 2931). As I'm not sure, if this was a single
 595 case of misconfiguration, or if there are more such broken systems
 596 out, I try to impose as least impact as possible and for now just write
 597 a panic log entry pointing to the bug report. You're encouraged to
 598 contact the developers, if you experience this issue.
 599
 600 fd     the file descriptor (or -1 if not valid)
 601 name   the file name for error messages or for file operations,
 602   if fd is < 0
 603 owner  the owner
 604 group  the group
 605
 606 returns 0 on success, -1 on failure */
 607
 608 static inline int
 609 exim_fchown(int fd, uid_t owner, gid_t group, const uschar *name)
 610 {
 611 return fchown(fd, owner, group)
 612   ? exim_chown_failure(fd, name, owner, group) : 0;
 613 }
 614
 615 static inline int
 616 exim_chown(const uschar *name, uid_t owner, gid_t group)
 617 {
 618 return chown(CCS name, owner, group)
 619   ? exim_chown_failure(-1, name, owner, group) : 0;
 620 }
 621
 622 #endif  /* !MACRO_PREDEF && !COMPILE_UTILITY */
 623 /******************************************************************************/
 624 /* String functions */
 625
 626 /*************************************************
 627 *            Copy and save string                *
 628 *************************************************/
 629
 630 /* This function assumes that memcpy() is faster than strcpy().
 631 */
 632
 633 #if !defined(MACRO_PREDEF)
 634 static inline uschar *
 635 string_copy(const uschar *s)
 636 {
 637 int len = Ustrlen(s) + 1;
 638 uschar *ss = store_get(len);
 639 memcpy(ss, s, len);
 640 return ss;
 641 }
 642
 643
 644 /*************************************************
 645 *       Copy, lowercase and save string          *
 646 *************************************************/
 647
 648 /*
 649 Argument: string to copy
 650 Returns:  copy of string in new store, with letters lowercased
 651 */
 652
 653 static inline uschar *
 654 string_copylc(const uschar *s)
 655 {
 656 uschar *ss = store_get(Ustrlen(s) + 1);
 657 uschar *p = ss;
 658 while (*s != 0) *p++ = tolower(*s++);
 659 *p = 0;
 660 return ss;
 661 }
 662
 663
 664
 665 /*************************************************
 666 *       Copy and save string, given length       *
 667 *************************************************/
 668
 669 /* It is assumed the data contains no zeros. A zero is added
 670 onto the end.
 671
 672 Arguments:
 673   s         string to copy
 674   n         number of characters
 675
 676 Returns:    copy of string in new store
 677
 678 This is an API for local_scan hence not static.
 679 */
 680
 681 static inline uschar *
 682 string_copyn(const uschar *s, int n)
 683 {
 684 uschar *ss = store_get(n + 1);
 685 Ustrncpy(ss, s, n);
 686 ss[n] = 0;
 687 return ss;
 688 }
 689
 690 /*************************************************
 691 * Copy, lowercase, and save string, given length *
 692 *************************************************/
 693
 694 /* It is assumed the data contains no zeros. A zero is added
 695 onto the end.
 696
 697 Arguments:
 698   s         string to copy
 699   n         number of characters
 700
 701 Returns:    copy of string in new store, with letters lowercased
 702 */
 703
 704 static inline uschar *
 705 string_copynlc(uschar *s, int n)
 706 {
 707 uschar *ss = store_get(n + 1);
 708 uschar *p = ss;
 709 while (n-- > 0) *p++ = tolower(*s++);
 710 *p = 0;
 711 return ss;
 712 }
 713
 714
 715 /******************************************************************************/
 716 /* Growable-string functions */
 717
 718 /* Create a growable-string with some preassigned space, in untainted memory */
 719
 720 static inline gstring *
 721 string_get(unsigned size)
 722 {
 723 gstring * g = store_get(sizeof(gstring) + size);
 724 g->size = size;
 725 g->ptr = 0;
 726 g->s = US(g + 1);
 727 return g;
 728 }
 729
 730 /* NUL-terminate the C string in the growable-string, and return it. */
 731
 732 static inline uschar *
 733 string_from_gstring(gstring * g)
 734 {
 735 if (!g) return NULL;
 736 g->s[g->ptr] = '\0';
 737 return g->s;
 738 }
 739
 740 static inline void
 741 gstring_release_unused(gstring * g)
 742 {
 743 if (g) store_reset(g->s + (g->size = g->ptr + 1));
 744 }
 745
 746 /******************************************************************************/
 747 #endif  /* !MACRO_PREDEF */
 748
 749 #endif  /* _FUNCTIONS_H_ */
 750
 751 /* vi: aw
 752 */
 753 /* End of functions.h */