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 #include <sys/time.h>
  17
  18
  19 #ifdef EXIM_PERL
  20 extern gstring *call_perl_cat(gstring *, uschar **, uschar *,
  21                  uschar **) WARN_UNUSED_RESULT;
  22 extern void    cleanup_perl(void);
  23 extern uschar *init_perl(uschar *);
  24 #endif
  25
  26
  27 #ifndef DISABLE_TLS
  28 extern const char *
  29                std_dh_prime_default(void);
  30 extern const char *
  31                std_dh_prime_named(const uschar *);
  32
  33 extern uschar * tls_cert_crl_uri(void *, uschar * mod);
  34 extern uschar * tls_cert_ext_by_oid(void *, uschar *, int);
  35 extern uschar * tls_cert_issuer(void *, uschar * mod);
  36 extern uschar * tls_cert_not_before(void *, uschar * mod);
  37 extern uschar * tls_cert_not_after(void *, uschar * mod);
  38 extern uschar * tls_cert_ocsp_uri(void *, uschar * mod);
  39 extern uschar * tls_cert_serial_number(void *, uschar * mod);
  40 extern uschar * tls_cert_signature(void *, uschar * mod);
  41 extern uschar * tls_cert_signature_algorithm(void *, uschar * mod);
  42 extern uschar * tls_cert_subject(void *, uschar * mod);
  43 extern uschar * tls_cert_subject_altname(void *, uschar * mod);
  44 extern uschar * tls_cert_version(void *, uschar * mod);
  45
  46 extern uschar * tls_cert_der_b64(void * cert);
  47 extern uschar * tls_cert_fprt_md5(void *);
  48 extern uschar * tls_cert_fprt_sha1(void *);
  49 extern uschar * tls_cert_fprt_sha256(void *);
  50
  51 extern void    tls_clean_env(void);
  52 extern BOOL    tls_client_start(client_conn_ctx *, smtp_connect_args *,
  53                   void *, tls_support *, uschar **);
  54
  55 extern void    tls_close(void *, int);
  56 extern BOOL    tls_could_read(void);
  57 extern void    tls_daemon_init(void);
  58 extern BOOL    tls_dropprivs_validate_require_cipher(BOOL);
  59 extern BOOL    tls_export_cert(uschar *, size_t, void *);
  60 extern int     tls_feof(void);
  61 extern int     tls_ferror(void);
  62 extern void    tls_free_cert(void **);
  63 extern int     tls_getc(unsigned);
  64 extern uschar *tls_getbuf(unsigned *);
  65 extern void    tls_get_cache(void);
  66 extern BOOL    tls_import_cert(const uschar *, void **);
  67 extern int     tls_read(void *, uschar *, size_t);
  68 extern int     tls_server_start(const uschar *, uschar **);
  69 extern BOOL    tls_smtp_buffered(void);
  70 extern int     tls_ungetc(int);
  71 extern int     tls_write(void *, const uschar *, size_t, BOOL);
  72 extern uschar *tls_validate_require_cipher(void);
  73 extern void    tls_version_report(FILE *);
  74 # ifdef USE_OPENSSL
  75 extern BOOL    tls_openssl_options_parse(uschar *, long *);
  76 # endif
  77 extern uschar * tls_field_from_dn(uschar *, const uschar *);
  78 extern BOOL    tls_is_name_for_cert(const uschar *, void *);
  79
  80 # ifdef SUPPORT_DANE
  81 extern int     tlsa_lookup(const host_item *, dns_answer *, BOOL);
  82 # endif
  83
  84 #endif  /*DISABLE_TLS*/
  85
  86
  87 /* Everything else... */
  88
  89 extern acl_block *acl_read(uschar *(*)(void), uschar **);
  90 extern int     acl_check(int, uschar *, uschar *, uschar **, uschar **);
  91 extern int     acl_eval(int, uschar *, uschar **, uschar **);
  92
  93 extern tree_node *acl_var_create(uschar *);
  94 extern void    acl_var_write(uschar *, uschar *, void *);
  95
  96 #ifdef EXPERIMENTAL_ARC
  97 extern void   *arc_ams_setup_sign_bodyhash(void);
  98 extern const uschar *arc_header_feed(gstring *, BOOL);
  99 extern gstring *arc_sign(const uschar *, gstring *, uschar **);
 100 extern void     arc_sign_init(void);
 101 extern const uschar *acl_verify_arc(void);
 102 extern uschar * fn_arc_domains(void);
 103 #endif
 104
 105 extern void    assert_no_variables(void *, int, const char *, int);
 106 extern int     auth_call_pam(const uschar *, uschar **);
 107 extern int     auth_call_pwcheck(uschar *, uschar **);
 108 extern int     auth_call_radius(const uschar *, uschar **);
 109 extern int     auth_call_saslauthd(const uschar *, const uschar *,
 110                  const uschar *, const uschar *, uschar **);
 111 extern int     auth_check_serv_cond(auth_instance *);
 112 extern int     auth_check_some_cond(auth_instance *, uschar *, uschar *, int);
 113 extern int     auth_client_item(void *, auth_instance *, const uschar **,
 114                  unsigned, int, uschar *, int);
 115
 116
 117 extern int     auth_get_data(uschar **, const uschar *, int);
 118 extern int     auth_get_no64_data(uschar **, uschar *);
 119 extern int     auth_prompt(const uschar *);
 120 extern int     auth_read_input(const uschar *);
 121 extern void    auth_show_supported(FILE *);
 122 extern uschar *auth_xtextencode(uschar *, int);
 123 extern int     auth_xtextdecode(uschar *, uschar **);
 124
 125 #ifdef EXPERIMENTAL_ARC
 126 extern gstring *authres_arc(gstring *);
 127 #endif
 128 #ifndef DISABLE_DKIM
 129 extern gstring *authres_dkim(gstring *);
 130 #endif
 131 #ifdef SUPPORT_DMARC
 132 extern gstring *authres_dmarc(gstring *);
 133 #endif
 134 extern gstring *authres_smtpauth(gstring *);
 135 #ifdef SUPPORT_SPF
 136 extern gstring *authres_spf(gstring *);
 137 #endif
 138
 139 extern uschar *b64encode(const uschar *, int);
 140 extern uschar *b64encode_taint(const uschar *, int, BOOL);
 141 extern int     b64decode(const uschar *, uschar **);
 142 extern int     bdat_getc(unsigned);
 143 extern uschar *bdat_getbuf(unsigned *);
 144 extern int     bdat_ungetc(int);
 145 extern void    bdat_flush_data(void);
 146
 147 extern void    bits_clear(unsigned int *, size_t, int *);
 148 extern void    bits_set(unsigned int *, size_t, int *);
 149
 150 extern void    cancel_cutthrough_connection(BOOL, const uschar *);
 151 extern int     check_host(void *, const uschar *, const uschar **, uschar **);
 152 extern uschar **child_exec_exim(int, BOOL, int *, BOOL, int, ...);
 153 extern pid_t   child_open_uid(const uschar **, const uschar **, int,
 154                  uid_t *, gid_t *, int *, int *, uschar *, BOOL);
 155 extern BOOL    cleanup_environment(void);
 156 extern void    cutthrough_data_puts(uschar *, int);
 157 extern void    cutthrough_data_put_nl(void);
 158 extern uschar *cutthrough_finaldot(void);
 159 extern BOOL    cutthrough_flush_send(void);
 160 extern BOOL    cutthrough_headers_send(void);
 161 extern BOOL    cutthrough_predata(void);
 162 extern void    release_cutthrough_connection(const uschar *);
 163
 164 extern void    daemon_go(void);
 165
 166 #ifdef EXPERIMENTAL_DCC
 167 extern int     dcc_process(uschar **);
 168 #endif
 169
 170 extern void    debug_logging_activate(uschar *, uschar *);
 171 extern void    debug_logging_stop(void);
 172 extern void    debug_print_argv(const uschar **);
 173 extern void    debug_print_ids(uschar *);
 174 extern void    debug_printf_indent(const char *, ...) PRINTF_FUNCTION(1,2);
 175 extern void    debug_print_string(uschar *);
 176 extern void    debug_print_tree(tree_node *);
 177 extern void    debug_vprintf(int, const char *, va_list);
 178 extern void    decode_bits(unsigned int *, size_t, int *,
 179                    uschar *, bit_table *, int, uschar *, int);
 180 extern void    delete_pid_file(void);
 181 extern address_item *deliver_make_addr(uschar *, BOOL);
 182 extern void    delivery_log(int, address_item *, int, uschar *);
 183 extern int     deliver_message(uschar *, BOOL, BOOL);
 184 extern void    deliver_msglog(const char *, ...) PRINTF_FUNCTION(1,2);
 185 extern void    deliver_set_expansions(address_item *);
 186 extern int     deliver_split_address(address_item *);
 187 extern void    deliver_succeeded(address_item *);
 188
 189 extern uschar *deliver_get_sender_address (uschar *id);
 190 extern void    delivery_re_exec(int);
 191
 192 extern BOOL    directory_make(const uschar *, const uschar *, int, BOOL);
 193 #ifndef DISABLE_DKIM
 194 extern uschar *dkim_exim_query_dns_txt(const uschar *);
 195 extern void    dkim_exim_sign_init(void);
 196
 197 extern BOOL    dkim_transport_write_message(transport_ctx *,
 198                   struct ob_dkim *, const uschar ** errstr);
 199 #endif
 200 extern dns_address *dns_address_from_rr(dns_answer *, dns_record *);
 201 extern int     dns_basic_lookup(dns_answer *, const uschar *, int);
 202 extern uschar *dns_build_reverse(const uschar *);
 203 extern time_t  dns_expire_from_soa(dns_answer *, int);
 204 extern void    dns_init(BOOL, BOOL, BOOL);
 205 extern BOOL    dns_is_aa(const dns_answer *);
 206 extern BOOL    dns_is_secure(const dns_answer *);
 207 extern int     dns_lookup(dns_answer *, const uschar *, int, const uschar **);
 208 extern void    dns_pattern_init(void);
 209 extern int     dns_special_lookup(dns_answer *, const uschar *, int, const uschar **);
 210 extern dns_record *dns_next_rr(const dns_answer *, dns_scan *, int);
 211 extern uschar *dns_text_type(int);
 212 extern void    dscp_list_to_stream(FILE *);
 213 extern BOOL    dscp_lookup(const uschar *, int, int *, int *, int *);
 214
 215 extern void    enq_end(uschar *);
 216 extern BOOL    enq_start(uschar *, unsigned);
 217 #ifndef DISABLE_EVENT
 218 extern uschar *event_raise(uschar *, const uschar *, uschar *);
 219 extern void    msg_event_raise(const uschar *, const address_item *);
 220 #endif
 221
 222 extern int     exim_chown_failure(int, const uschar*, uid_t, gid_t);
 223 extern const uschar * exim_errstr(int);
 224 extern void    exim_exit(int, const uschar *) NORETURN;
 225 extern void    exim_nullstd(void);
 226 extern void    exim_setugid(uid_t, gid_t, BOOL, uschar *);
 227 extern void    exim_underbar_exit(int);
 228 extern void    exim_wait_tick(struct timeval *, int);
 229 extern int     exp_bool(address_item *addr,
 230   uschar *mtype, uschar *mname, unsigned dgb_opt, uschar *oname, BOOL bvalue,
 231   uschar *svalue, BOOL *rvalue);
 232 extern BOOL    expand_check_condition(uschar *, uschar *, uschar *);
 233 extern uschar *expand_file_big_buffer(const uschar *);
 234 extern uschar *expand_string(uschar *); /* public, cannot make const */
 235 extern const uschar *expand_cstring(const uschar *); /* ... so use this one */
 236 extern uschar *expand_hide_passwords(uschar * );
 237 extern uschar *expand_string_copy(const uschar *);
 238 extern int_eximarith_t expand_string_integer(uschar *, BOOL);
 239 extern void    modify_variable(uschar *, void *);
 240
 241 extern BOOL    fd_ready(int, time_t);
 242
 243 extern int     filter_interpret(uschar *, int, address_item **, uschar **);
 244 extern BOOL    filter_personal(string_item *, BOOL);
 245 extern BOOL    filter_runtest(int, uschar *, BOOL, BOOL);
 246 extern BOOL    filter_system_interpret(address_item **, uschar **);
 247
 248 extern uschar * fn_hdrs_added(void);
 249
 250 extern void    header_add(int, const char *, ...);
 251 extern header_line *header_add_at_position_internal(BOOL, uschar *, BOOL, int, const char *, ...);
 252 extern int     header_checkname(header_line *, BOOL);
 253 extern BOOL    header_match(uschar *, BOOL, BOOL, string_item *, int, ...);
 254 extern int     host_address_extract_port(uschar *);
 255 extern uschar *host_and_ident(BOOL);
 256 extern int     host_aton(const uschar *, int *);
 257 extern void    host_build_hostlist(host_item **, const uschar *, BOOL);
 258 extern ip_address_item *host_build_ifacelist(const uschar *, uschar *);
 259 extern void    host_build_log_info(void);
 260 extern void    host_build_sender_fullhost(void);
 261 extern int     host_find_byname(host_item *, const uschar *, int,
 262                                 const uschar **, BOOL);
 263 extern int     host_find_bydns(host_item *, const uschar *, int, uschar *, uschar *,
 264                  uschar *, const dnssec_domains *, const uschar **, BOOL *);
 265 extern ip_address_item *host_find_interfaces(void);
 266 extern BOOL    host_is_in_net(const uschar *, const uschar *, int);
 267 extern BOOL    host_is_tls_on_connect_port(int);
 268 extern int     host_item_get_port(host_item *);
 269 extern void    host_mask(int, int *, int);
 270 extern int     host_name_lookup(void);
 271 extern int     host_nmtoa(int, int *, int, uschar *, int);
 272 extern uschar *host_ntoa(int, const void *, uschar *, int *);
 273 extern int     host_scan_for_local_hosts(host_item *, host_item **, BOOL *);
 274
 275 extern uschar *imap_utf7_encode(uschar *, const uschar *,
 276                                  uschar, uschar *, uschar **);
 277
 278 extern void    invert_address(uschar *, uschar *);
 279 extern int     ip_addr(void *, int, const uschar *, int);
 280 extern int     ip_bind(int, int, uschar *, int);
 281 extern int     ip_connect(int, int, const uschar *, int, int, const blob *);
 282 extern int     ip_connectedsocket(int, const uschar *, int, int,
 283                  int, host_item *, uschar **, const blob *);
 284 extern int     ip_get_address_family(int);
 285 extern void    ip_keepalive(int, const uschar *, BOOL);
 286 extern int     ip_recv(client_conn_ctx *, uschar *, int, time_t);
 287 extern int     ip_socket(int, int);
 288
 289 extern int     ip_tcpsocket(const uschar *, uschar **, int);
 290 extern int     ip_unixsocket(const uschar *, uschar **);
 291 extern int     ip_streamsocket(const uschar *, uschar **, int);
 292
 293 extern int     ipv6_nmtoa(int *, uschar *);
 294
 295 extern uschar *local_part_quote(uschar *);
 296 extern int     log_create(uschar *);
 297 extern int     log_create_as_exim(uschar *);
 298 extern void    log_close_all(void);
 299
 300 extern macro_item * macro_create(const uschar *, const uschar *, BOOL);
 301 extern BOOL    macro_read_assignment(uschar *);
 302 extern uschar *macros_expand(int, int *, BOOL *);
 303 extern void    mainlog_close(void);
 304 #ifdef WITH_CONTENT_SCAN
 305 extern int     malware(const uschar *, int);
 306 extern int     malware_in_file(uschar *);
 307 extern void    malware_init(void);
 308 extern void    malware_show_supported(FILE *);
 309 #endif
 310 extern int     match_address_list(const uschar *, BOOL, BOOL, const uschar **,
 311                  unsigned int *, int, int, const uschar **);
 312 extern int     match_address_list_basic(const uschar *, const uschar **, int);
 313 extern int     match_check_list(const uschar **, int, tree_node **, unsigned int **,
 314                  int(*)(void *, const uschar *, const uschar **, uschar **), void *, int,
 315                  const uschar *, const uschar **);
 316 extern int     match_isinlist(const uschar *, const uschar **, int, tree_node **,
 317                  unsigned int *, int, BOOL, const uschar **);
 318 extern int     match_check_string(const uschar *, const uschar *, int, BOOL, BOOL, BOOL,
 319                  const uschar **);
 320 extern void    md5_end(md5 *, const uschar *, int, uschar *);
 321 extern void    md5_mid(md5 *, const uschar *);
 322 extern void    md5_start(md5 *);
 323 extern void    millisleep(int);
 324 #ifdef WITH_CONTENT_SCAN
 325 struct mime_boundary_context;
 326 extern int     mime_acl_check(uschar *acl, FILE *f,
 327                  struct mime_boundary_context *, uschar **, uschar **);
 328 extern int     mime_decode(const uschar **);
 329 extern ssize_t mime_decode_base64(FILE *, FILE *, uschar *);
 330 extern int     mime_regex(const uschar **);
 331 extern void    mime_set_anomaly(int);
 332 #endif
 333 extern uschar *moan_check_errorcopy(uschar *);
 334 extern BOOL    moan_skipped_syntax_errors(uschar *, error_block *, uschar *,
 335                  BOOL, uschar *);
 336 extern void    moan_smtp_batch(uschar *, const char *, ...) PRINTF_FUNCTION(2,3);
 337 extern BOOL    moan_send_message(uschar *, int, error_block *eblock,
 338                  header_line *, FILE *, uschar *);
 339 extern void    moan_tell_someone(uschar *, address_item *,
 340                  const uschar *, const char *, ...) PRINTF_FUNCTION(4,5);
 341 extern BOOL    moan_to_sender(int, error_block *, header_line *, FILE *, BOOL);
 342 extern void    moan_write_from(FILE *);
 343 extern void    moan_write_references(FILE *, uschar *);
 344 extern FILE   *modefopen(const uschar *, const char *, mode_t);
 345
 346 extern int     open_cutthrough_connection( address_item * addr );
 347
 348 extern uschar *parse_extract_address(uschar *, uschar **, int *, int *, int *,
 349                  BOOL);
 350 extern int     parse_forward_list(uschar *, int, address_item **, uschar **,
 351                  const uschar *, uschar *, error_block **);
 352 extern uschar *parse_find_address_end(uschar *, BOOL);
 353 extern uschar *parse_find_at(uschar *);
 354 extern const uschar *parse_fix_phrase(const uschar *, int, uschar *, int);
 355 extern uschar *parse_message_id(uschar *, uschar **, uschar **);
 356 extern const uschar *parse_quote_2047(const uschar *, int, uschar *, uschar *, int, BOOL);
 357 extern uschar *parse_date_time(uschar *str, time_t *t);
 358 extern int     vaguely_random_number(int);
 359 #ifndef DISABLE_TLS
 360 extern int     vaguely_random_number_fallback(int);
 361 #endif
 362
 363 extern BOOL    queue_action(uschar *, int, uschar **, int, int);
 364 extern void    queue_check_only(void);
 365 extern void    queue_list(int, uschar **, int);
 366 extern void    queue_count(void);
 367 extern void    queue_run(uschar *, uschar *, BOOL);
 368
 369 extern int     random_number(int);
 370 extern const uschar *rc_to_string(int);
 371 extern int     rda_interpret(redirect_block *, int, uschar *, uschar *,
 372                  uschar *, uschar *, uschar *, ugid_block *, address_item **,
 373                  uschar **, error_block **, int *, uschar *);
 374 extern int     rda_is_filter(const uschar *);
 375 extern BOOL    readconf_depends(driver_instance *, uschar *);
 376 extern void    readconf_driver_init(uschar *, driver_instance **,
 377                  driver_info *, int, void *, int, optionlist *, int);
 378 extern uschar *readconf_find_option(void *);
 379 extern void    readconf_main(BOOL);
 380 extern void    readconf_options_from_list(optionlist *, unsigned, const uschar *, uschar *);
 381 extern BOOL    readconf_print(uschar *, uschar *, BOOL);
 382 extern uschar *readconf_printtime(int);
 383 extern uschar *readconf_readname(uschar *, int, uschar *);
 384 extern int     readconf_readtime(const uschar *, int, BOOL);
 385 extern void    readconf_rest(void);
 386 extern uschar *readconf_retry_error(const uschar *, const uschar *, int *, int *);
 387 extern void    readconf_save_config(const uschar *);
 388 extern void    read_message_body(BOOL);
 389 extern void    receive_bomb_out(uschar *, uschar *) NORETURN;
 390 extern BOOL    receive_check_fs(int);
 391 extern BOOL    receive_check_set_sender(uschar *);
 392 extern BOOL    receive_msg(BOOL);
 393 extern int_eximarith_t receive_statvfs(BOOL, int *);
 394 extern void    receive_swallow_smtp(void);
 395 #ifdef WITH_CONTENT_SCAN
 396 extern int     regex(const uschar **);
 397 #endif
 398 extern BOOL    regex_match_and_setup(const pcre *, const uschar *, int, int);
 399 extern const pcre *regex_must_compile(const uschar *, BOOL, BOOL);
 400 extern void    retry_add_item(address_item *, uschar *, int);
 401 extern BOOL    retry_check_address(const uschar *, host_item *, uschar *, BOOL,
 402                  uschar **, uschar **);
 403 extern retry_config *retry_find_config(const uschar *, const uschar *, int, int);
 404 extern BOOL    retry_ultimate_address_timeout(uschar *, const uschar *,
 405                  dbdata_retry *, time_t);
 406 extern void    retry_update(address_item **, address_item **, address_item **);
 407 extern uschar *rewrite_address(uschar *, BOOL, BOOL, rewrite_rule *, int);
 408 extern uschar *rewrite_address_qualify(uschar *, BOOL);
 409 extern header_line *rewrite_header(header_line *,
 410                const uschar *, const uschar *,
 411                rewrite_rule *, int, BOOL);
 412 extern uschar *rewrite_one(uschar *, int, BOOL *, BOOL, uschar *,
 413                  rewrite_rule *);
 414 extern void    rewrite_test(uschar *);
 415 extern uschar *rfc2047_decode2(uschar *, BOOL, uschar *, int, int *, int *,
 416                  uschar **);
 417 extern int     route_address(address_item *, address_item **, address_item **,
 418                  address_item **, address_item **, int);
 419 extern int     route_check_prefix(const uschar *, const uschar *);
 420 extern int     route_check_suffix(const uschar *, const uschar *);
 421 extern BOOL    route_findgroup(uschar *, gid_t *);
 422 extern BOOL    route_finduser(const uschar *, struct passwd **, uid_t *);
 423 extern BOOL    route_find_expanded_group(uschar *, uschar *, uschar *, gid_t *,
 424                  uschar **);
 425 extern BOOL    route_find_expanded_user(uschar *, uschar *, uschar *,
 426                  struct passwd **, uid_t *, uschar **);
 427 extern void    route_init(void);
 428 extern void    route_show_supported(FILE *);
 429 extern void    route_tidyup(void);
 430
 431 extern uschar *search_find(void *, uschar *, uschar *, int, const uschar *, int,
 432                  int, int *);
 433 extern int     search_findtype(const uschar *, int);
 434 extern int     search_findtype_partial(const uschar *, int *, const uschar **, int *,
 435                  int *);
 436 extern void   *search_open(uschar *, int, int, uid_t *, gid_t *);
 437 extern void    search_tidyup(void);
 438 extern void    set_process_info(const char *, ...) PRINTF_FUNCTION(1,2);
 439 extern void    sha1_end(hctx *, const uschar *, int, uschar *);
 440 extern void    sha1_mid(hctx *, const uschar *);
 441 extern void    sha1_start(hctx *);
 442 extern int     sieve_interpret(uschar *, int, uschar *, uschar *, uschar *,
 443                  uschar *, address_item **, uschar **);
 444 extern void    sigalrm_handler(int);
 445 extern BOOL    smtp_buffered(void);
 446 extern void    smtp_closedown(uschar *);
 447 extern void    smtp_command_timeout_exit(void) NORETURN;
 448 extern void    smtp_command_sigterm_exit(void) NORETURN;
 449 extern void    smtp_data_timeout_exit(void) NORETURN;
 450 extern void    smtp_data_sigint_exit(void) NORETURN;
 451 extern void    smtp_deliver_init(void);
 452 extern uschar *smtp_cmd_hist(void);
 453 extern int     smtp_connect(smtp_connect_args *, const blob *);
 454 extern int     smtp_sock_connect(host_item *, int, int, uschar *,
 455                  transport_instance * tb, int, const blob *);
 456 extern int     smtp_feof(void);
 457 extern int     smtp_ferror(void);
 458 extern uschar *smtp_get_connection_info(void);
 459 extern BOOL    smtp_get_interface(uschar *, int, address_item *,
 460                  uschar **, uschar *);
 461 extern BOOL    smtp_get_port(uschar *, address_item *, int *, uschar *);
 462 extern int     smtp_getc(unsigned);
 463 extern uschar *smtp_getbuf(unsigned *);
 464 extern void    smtp_get_cache(void);
 465 extern int     smtp_handle_acl_fail(int, int, uschar *, uschar *);
 466 extern void    smtp_log_no_mail(void);
 467 extern void    smtp_message_code(uschar **, int *, uschar **, uschar **, BOOL);
 468 extern void    smtp_proxy_tls(void *, uschar *, size_t, int *, int) NORETURN;
 469 extern BOOL    smtp_read_response(void *, uschar *, int, int, int);
 470 extern void   *smtp_reset(void *);
 471 extern void    smtp_respond(uschar *, int, BOOL, uschar *);
 472 extern void    smtp_notquit_exit(uschar *, uschar *, uschar *, ...);
 473 extern void    smtp_port_for_connect(host_item *, int);
 474 extern void    smtp_send_prohibition_message(int, uschar *);
 475 extern int     smtp_setup_msg(void);
 476 extern BOOL    smtp_start_session(void);
 477 extern int     smtp_ungetc(int);
 478 extern BOOL    smtp_verify_helo(void);
 479 extern int     smtp_write_command(void *, int, const char *, ...) PRINTF_FUNCTION(3,4);
 480 #ifdef WITH_CONTENT_SCAN
 481 extern int     spam(const uschar **);
 482 extern FILE   *spool_mbox(unsigned long *, const uschar *, uschar **);
 483 #endif
 484 extern void    spool_clear_header_globals(void);
 485 extern BOOL    spool_move_message(uschar *, uschar *, uschar *, uschar *);
 486 extern int     spool_open_datafile(uschar *);
 487 extern int     spool_open_temp(uschar *);
 488 extern int     spool_read_header(uschar *, BOOL, BOOL);
 489 extern int     spool_write_header(uschar *, int, uschar **);
 490 extern int     stdin_getc(unsigned);
 491 extern int     stdin_feof(void);
 492 extern int     stdin_ferror(void);
 493 extern int     stdin_ungetc(int);
 494
 495 extern void    store_exit(void);
 496 extern gstring *string_append(gstring *, int, ...) WARN_UNUSED_RESULT;
 497 extern gstring *string_append_listele(gstring *, uschar, const uschar *) WARN_UNUSED_RESULT;
 498 extern gstring *string_append_listele_n(gstring *, uschar, const uschar *, unsigned) WARN_UNUSED_RESULT;
 499 extern gstring *string_append2_listele_n(gstring *, const uschar *, const uschar *, unsigned) WARN_UNUSED_RESULT;
 500 extern uschar *string_base62(unsigned long int);
 501 extern gstring *string_cat (gstring *, const uschar *     ) WARN_UNUSED_RESULT;
 502 extern gstring *string_catn(gstring *, const uschar *, int) WARN_UNUSED_RESULT;
 503 extern int     string_compare_by_pointer(const void *, const void *);
 504 extern uschar *string_copy_dnsdomain(uschar *);
 505 extern uschar *string_copy_malloc(const uschar *);
 506 extern uschar *string_dequote(const uschar **);
 507 extern uschar *string_format_size(int, uschar *);
 508 extern int     string_interpret_escape(const uschar **);
 509 extern int     string_is_ip_address(const uschar *, int *);
 510 #ifdef SUPPORT_I18N
 511 extern BOOL    string_is_utf8(const uschar *);
 512 #endif
 513 extern uschar *string_nextinlist(const uschar **, int *, uschar *, int);
 514 extern const uschar *string_printing2(const uschar *, BOOL);
 515 extern uschar *string_split_message(uschar *);
 516 extern uschar *string_unprinting(uschar *);
 517 #ifdef SUPPORT_I18N
 518 extern uschar *string_address_utf8_to_alabel(const uschar *, uschar **);
 519 extern uschar *string_domain_alabel_to_utf8(const uschar *, uschar **);
 520 extern uschar *string_domain_utf8_to_alabel(const uschar *, uschar **);
 521 extern uschar *string_localpart_alabel_to_utf8(const uschar *, uschar **);
 522 extern uschar *string_localpart_utf8_to_alabel(const uschar *, uschar **);
 523 #endif
 524
 525 #define string_format(buf, siz, fmt, ...) \
 526         string_format_trc(buf, siz, US __FUNCTION__, __LINE__, fmt, __VA_ARGS__)
 527 extern BOOL    string_format_trc(uschar *, int, const uschar *, unsigned,
 528                         const char *, ...) ALMOST_PRINTF(5,6);
 529
 530 #define string_vformat(g, flgs, fmt, ap) \
 531         string_vformat_trc(g, US __FUNCTION__, __LINE__, \
 532                          STRING_SPRINTF_BUFFER_SIZE, flgs, fmt, ap)
 533 extern gstring *string_vformat_trc(gstring *, const uschar *, unsigned,
 534                         unsigned, unsigned, const char *, va_list);
 535
 536 #define string_open_failed(eno, fmt, ...) \
 537         string_open_failed_trc(eno, US __FUNCTION__, __LINE__, fmt, __VA_ARGS__)
 538 extern uschar *string_open_failed_trc(int, const uschar *, unsigned,
 539                         const char *, ...) PRINTF_FUNCTION(4,5);
 540
 541 extern int     strcmpic(const uschar *, const uschar *);
 542 extern int     strncmpic(const uschar *, const uschar *, int);
 543 extern uschar *strstric(uschar *, uschar *, BOOL);
 544
 545 extern int     test_harness_fudged_queue_time(int);
 546 extern void    tcp_init(void);
 547 #ifdef EXIM_TFO_PROBE
 548 extern void    tfo_probe(void);
 549 #endif
 550 extern void    tls_modify_variables(tls_support *);
 551 extern uschar *tod_stamp(int);
 552
 553 extern BOOL    transport_check_waiting(const uschar *, const uschar *, int, uschar *,
 554                  BOOL *, oicf, void*);
 555 extern void    transport_init(void);
 556 extern void    transport_do_pass_socket(const uschar *, const uschar *,
 557                  const uschar *, uschar *, int);
 558 extern BOOL    transport_pass_socket(const uschar *, const uschar *, const uschar *, uschar *,
 559                  int);
 560 extern uschar *transport_rcpt_address(address_item *, BOOL);
 561 extern BOOL    transport_set_up_command(const uschar ***, uschar *,
 562                  BOOL, int, address_item *, uschar *, uschar **);
 563 extern void    transport_update_waiting(host_item *, uschar *);
 564 extern BOOL    transport_write_block(transport_ctx *, uschar *, int, BOOL);
 565 extern void    transport_write_reset(int);
 566 extern BOOL    transport_write_string(int, const char *, ...);
 567 extern BOOL    transport_headers_send(transport_ctx *,
 568                  BOOL (*)(transport_ctx *, uschar *, int));
 569 extern void    transport_show_supported(FILE *);
 570 extern BOOL    transport_write_message(transport_ctx *, int);
 571 extern void    tree_add_duplicate(uschar *, address_item *);
 572 extern void    tree_add_nonrecipient(uschar *);
 573 extern void    tree_add_unusable(host_item *);
 574 extern void    tree_dup(tree_node **, tree_node *);
 575 extern int     tree_insertnode(tree_node **, tree_node *);
 576 extern tree_node *tree_search(tree_node *, const uschar *);
 577 extern void    tree_write(tree_node *, FILE *);
 578 extern void    tree_walk(tree_node *, void (*)(uschar*, uschar*, void*), void *);
 579
 580 #ifdef WITH_CONTENT_SCAN
 581 extern void    unspool_mbox(void);
 582 #endif
 583 #ifdef SUPPORT_I18N
 584 extern void    utf8_version_report(FILE *);
 585 #endif
 586
 587 extern int     verify_address(address_item *, FILE *, int, int, int, int,
 588                  uschar *, uschar *, BOOL *);
 589 extern int     verify_check_dnsbl(int, const uschar **, uschar **);
 590 extern int     verify_check_header_address(uschar **, uschar **, int, int, int,
 591                  uschar *, uschar *, int, int *);
 592 extern int     verify_check_headers(uschar **);
 593 extern int     verify_check_header_names_ascii(uschar **);
 594 extern int     verify_check_host(uschar **);
 595 extern int     verify_check_notblind(BOOL);
 596 extern int     verify_check_given_host(const uschar **, const host_item *);
 597 extern int     verify_check_this_host(const uschar **, unsigned int *,
 598                  const uschar*, const uschar *, const uschar **);
 599 extern address_item *verify_checked_sender(uschar *);
 600 extern void    verify_get_ident(int);
 601 extern BOOL    verify_sender(int *, uschar **);
 602 extern BOOL    verify_sender_preliminary(int *, uschar **);
 603 extern void    version_init(void);
 604
 605 extern BOOL    write_chunk(transport_ctx *, uschar *, int);
 606 extern ssize_t write_to_fd_buf(int, const uschar *, size_t);
 607
 608
 609 #if !defined(MACRO_PREDEF) && !defined(COMPILE_UTILITY)
 610 /* exim_chown - in some NFSv4 setups *seemes* to be an issue with
 611 chown(<exim-uid>, <exim-gid>).
 612
 613 Probably because the idmapping is broken, misconfigured or set up in
 614 an unusal way. (see Bug 2931). As I'm not sure, if this was a single
 615 case of misconfiguration, or if there are more such broken systems
 616 out, I try to impose as least impact as possible and for now just write
 617 a panic log entry pointing to the bug report. You're encouraged to
 618 contact the developers, if you experience this issue.
 619
 620 fd     the file descriptor (or -1 if not valid)
 621 name   the file name for error messages or for file operations,
 622   if fd is < 0
 623 owner  the owner
 624 group  the group
 625
 626 returns 0 on success, -1 on failure */
 627
 628 static inline int
 629 exim_fchown(int fd, uid_t owner, gid_t group, const uschar *name)
 630 {
 631 return fchown(fd, owner, group)
 632   ? exim_chown_failure(fd, name, owner, group) : 0;
 633 }
 634
 635 static inline int
 636 exim_chown(const uschar *name, uid_t owner, gid_t group)
 637 {
 638 return chown(CCS name, owner, group)
 639   ? exim_chown_failure(-1, name, owner, group) : 0;
 640 }
 641
 642 #endif  /* !MACRO_PREDEF && !COMPILE_UTILITY */
 643 /******************************************************************************/
 644 /* String functions */
 645
 646 #if !defined(MACRO_PREDEF)
 647 /*************************************************
 648 *            Copy and save string                *
 649 *************************************************/
 650
 651 /* This function assumes that memcpy() is faster than strcpy().
 652 */
 653
 654 static inline uschar *
 655 string_copy_taint_trc(const uschar *s, BOOL tainted, const char * func, int line)
 656 {
 657 int len = Ustrlen(s) + 1;
 658 uschar *ss = store_get_3(len, tainted, func, line);
 659 memcpy(ss, s, len);
 660 return ss;
 661 }
 662
 663 #define string_copy_taint(s, tainted) \
 664         string_copy_taint_trc((s), tainted, __FUNCTION__, __LINE__)
 665
 666 static inline uschar *
 667 string_copy(const uschar * s)
 668 {
 669 return string_copy_taint((s), is_tainted(s));
 670 }
 671
 672
 673 /*************************************************
 674 *       Copy, lowercase and save string          *
 675 *************************************************/
 676
 677 /*
 678 Argument: string to copy
 679 Returns:  copy of string in new store, with letters lowercased
 680 */
 681
 682 static inline uschar *
 683 string_copylc(const uschar *s)
 684 {
 685 uschar *ss = store_get(Ustrlen(s) + 1, is_tainted(s));
 686 uschar *p = ss;
 687 while (*s != 0) *p++ = tolower(*s++);
 688 *p = 0;
 689 return ss;
 690 }
 691
 692
 693
 694 /*************************************************
 695 *       Copy and save string, given length       *
 696 *************************************************/
 697
 698 /* It is assumed the data contains no zeros. A zero is added
 699 onto the end.
 700
 701 Arguments:
 702   s         string to copy
 703   n         number of characters
 704
 705 Returns:    copy of string in new store
 706
 707 This is an API for local_scan hence not static.
 708 */
 709
 710 static inline uschar *
 711 string_copyn(const uschar *s, int n)
 712 {
 713 uschar *ss = store_get(n + 1, is_tainted(s));
 714 Ustrncpy(ss, s, n);
 715 ss[n] = 0;
 716 return ss;
 717 }
 718
 719 /*************************************************
 720 * Copy, lowercase, and save string, given length *
 721 *************************************************/
 722
 723 /* It is assumed the data contains no zeros. A zero is added
 724 onto the end.
 725
 726 Arguments:
 727   s         string to copy
 728   n         number of characters
 729
 730 Returns:    copy of string in new store, with letters lowercased
 731 */
 732
 733 static inline uschar *
 734 string_copynlc(uschar *s, int n)
 735 {
 736 uschar *ss = store_get(n + 1, is_tainted(s));
 737 uschar *p = ss;
 738 while (n-- > 0) *p++ = tolower(*s++);
 739 *p = 0;
 740 return ss;
 741 }
 742
 743
 744 # ifndef COMPILE_UTILITY
 745 /*************************************************
 746 *     Copy and save string in longterm store     *
 747 *************************************************/
 748
 749 /* This function assumes that memcpy() is faster than strcpy().
 750
 751 Argument: string to copy
 752 Returns:  copy of string in new store
 753 */
 754
 755 static inline uschar *
 756 string_copy_perm(const uschar *s, BOOL force_taint)
 757 {
 758 int old_pool = store_pool;
 759 int len = Ustrlen(s) + 1;
 760 uschar *ss;
 761
 762 store_pool = POOL_PERM;
 763 ss = store_get(len, force_taint || is_tainted(s));
 764 memcpy(ss, s, len);
 765 store_pool = old_pool;
 766 return ss;
 767 }
 768 # endif
 769
 770
 771
 772 /* sprintf into a buffer, taint-unchecked */
 773
 774 static inline void
 775 string_format_nt(uschar * buf, int siz, const char * fmt, ...)
 776 {
 777 gstring gs = { .size = siz, .ptr = 0, .s = buf };
 778 va_list ap;
 779 va_start(ap, fmt);
 780 (void) string_vformat(&gs, SVFMT_TAINT_NOCHK, fmt, ap);
 781 va_end(ap);
 782 }
 783
 784
 785
 786 /******************************************************************************/
 787 /* Growable-string functions */
 788
 789 /* Create a growable-string with some preassigned space */
 790
 791 #define string_get_tainted(size, tainted) \
 792         string_get_tainted_trc((size), (tainted), __FUNCTION__, __LINE__)
 793
 794 static inline gstring *
 795 string_get_tainted_trc(unsigned size, BOOL tainted, const char * func, unsigned line)
 796 {
 797 gstring * g = store_get_3(sizeof(gstring) + size, tainted, func, line);
 798 g->size = size;
 799 g->ptr = 0;
 800 g->s = US(g + 1);
 801 return g;
 802 }
 803
 804 #define string_get(size) \
 805         string_get_trc((size), __FUNCTION__, __LINE__)
 806
 807 static inline gstring *
 808 string_get_trc(unsigned size, const char * func, unsigned line)
 809 {
 810 return string_get_tainted_trc(size, FALSE, func, line);
 811 }
 812
 813 /* NUL-terminate the C string in the growable-string, and return it. */
 814
 815 static inline uschar *
 816 string_from_gstring(gstring * g)
 817 {
 818 if (!g) return NULL;
 819 g->s[g->ptr] = '\0';
 820 return g->s;
 821 }
 822
 823
 824 #define gstring_release_unused(g) \
 825         gstring_release_unused_trc(g, __FUNCTION__, __LINE__)
 826
 827 static inline void
 828 gstring_release_unused_trc(gstring * g, const char * file, unsigned line)
 829 {
 830 if (g) store_release_above_3(g->s + (g->size = g->ptr + 1), file, line);
 831 }
 832
 833
 834 /* sprintf-append to a growable-string */
 835
 836 #define string_fmt_append(g, fmt, ...) \
 837         string_fmt_append_f_trc(g, US __FUNCTION__, __LINE__, \
 838         SVFMT_EXTEND|SVFMT_REBUFFER, fmt, __VA_ARGS__)
 839
 840 #define string_fmt_append_f(g, flgs, fmt, ...) \
 841         string_fmt_append_f_trc(g, US __FUNCTION__, __LINE__, \
 842         flgs,         fmt, __VA_ARGS__)
 843
 844 static inline gstring *
 845 string_fmt_append_f_trc(gstring * g, const uschar * func, unsigned line,
 846   unsigned flags, const char *format, ...)
 847 {
 848 va_list ap;
 849 va_start(ap, format);
 850 g = string_vformat_trc(g, func, line, STRING_SPRINTF_BUFFER_SIZE,
 851                         flags, format, ap);
 852 va_end(ap);
 853 return g;
 854 }
 855
 856 /******************************************************************************/
 857
 858 #define store_get_dns_answer() store_get_dns_answer_trc(CUS __FUNCTION__, __LINE__)
 859
 860 static inline dns_answer *
 861 store_get_dns_answer_trc(const uschar * func, unsigned line)
 862 {
 863 return store_get_3(sizeof(dns_answer), TRUE, CCS func, line);  /* use tainted mem */
 864 }
 865
 866 /******************************************************************************/
 867 /* Routines with knowledge of spool layout */
 868
 869 # ifndef COMPILE_UTILITY
 870 static inline void
 871 spool_pname_buf(uschar * buf, int len)
 872 {
 873 snprintf(CS buf, len, "%s/%s/input", spool_directory, queue_name);
 874 }
 875
 876 static inline uschar *
 877 spool_dname(const uschar * purpose, uschar * subdir)
 878 {
 879 return string_sprintf("%s/%s/%s/%s",
 880         spool_directory, queue_name, purpose, subdir);
 881 }
 882 # endif
 883
 884 static inline uschar *
 885 spool_q_sname(const uschar * purpose, const uschar * q, uschar * subdir)
 886 {
 887 return string_sprintf("%s%s%s%s%s",
 888                     q, *q ? "/" : "",
 889                     purpose,
 890                     *subdir ? "/" : "", subdir);
 891 }
 892
 893 static inline uschar *
 894 spool_sname(const uschar * purpose, uschar * subdir)
 895 {
 896 return spool_q_sname(purpose, queue_name, subdir);
 897 }
 898
 899 static inline uschar *
 900 spool_q_fname(const uschar * purpose, const uschar * q,
 901         const uschar * subdir, const uschar * fname, const uschar * suffix)
 902 {
 903 return string_sprintf("%s/%s/%s/%s/%s%s",
 904         spool_directory, q, purpose, subdir, fname, suffix);
 905 }
 906
 907 static inline uschar *
 908 spool_fname(const uschar * purpose, const uschar * subdir, const uschar * fname,
 909         const uschar * suffix)
 910 {
 911 return spool_q_fname(purpose, queue_name, subdir, fname, suffix);
 912 }
 913
 914 static inline void
 915 set_subdir_str(uschar * subdir_str, const uschar * name,
 916         int search_sequence)
 917 {
 918 subdir_str[0] = split_spool_directory == (search_sequence == 0)
 919        ? name[5] : '\0';
 920 subdir_str[1] = '\0';
 921 }
 922
 923 /******************************************************************************/
 924 static inline void
 925 timesince(struct timeval * diff, struct timeval * then)
 926 {
 927 gettimeofday(diff, NULL);
 928 diff->tv_sec -= then->tv_sec;
 929 if ((diff->tv_usec -= then->tv_usec) < 0)
 930   {
 931   diff->tv_sec--;
 932   diff->tv_usec += 1000*1000;
 933   }
 934 }
 935
 936 static inline uschar *
 937 string_timediff(struct timeval * diff)
 938 {
 939 static uschar buf[sizeof("0.000s")];
 940
 941 if (diff->tv_sec >= 5 || !LOGGING(millisec))
 942   return readconf_printtime((int)diff->tv_sec);
 943
 944 snprintf(CS buf, sizeof(buf), "%u.%03us", (uint)diff->tv_sec, (uint)diff->tv_usec/1000);
 945 return buf;
 946 }
 947
 948
 949 static inline uschar *
 950 string_timesince(struct timeval * then)
 951 {
 952 struct timeval diff;
 953 timesince(&diff, then);
 954 return string_timediff(&diff);
 955 }
 956
 957 static inline void
 958 report_time_since(struct timeval * t0, uschar * where)
 959 {
 960 # ifdef MEASURE_TIMING
 961 struct timeval diff;
 962 timesince(&diff, t0);
 963 fprintf(stderr, "%d %s:\t%ld.%06ld\n",
 964        (uint)getpid(), where, (long)diff.tv_sec, (long)diff.tv_usec);
 965 # endif
 966 }
 967
 968
 969 static inline void
 970 testharness_pause_ms(int millisec)
 971 {
 972 #ifndef MEASURE_TIMING
 973 if (f.running_in_test_harness) millisleep(millisec);
 974 #endif
 975 }
 976
 977 #endif  /* !MACRO_PREDEF */
 978
 979 #endif  /* _FUNCTIONS_H_ */
 980
 981 /* vi: aw
 982 */
 983 /* End of functions.h */