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