1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* Copyright (c) The Exim Maintainers 2020 */
7 /* See the file NOTICE for conditions of use and distribution. */
10 /* Prototypes for functions that appear in various modules. Gathered together
11 to avoid having a lot of tiddly little headers with only a couple of lines in
12 them. However, some functions that are used (or not used) by utility programs
13 are in in fact in separate headers. */
22 extern gstring *call_perl_cat(gstring *, uschar **, uschar *,
23 uschar **) WARN_UNUSED_RESULT;
24 extern void cleanup_perl(void);
25 extern uschar *init_perl(uschar *);
31 std_dh_prime_default(void);
33 std_dh_prime_named(const uschar *);
35 extern uschar * tls_cert_crl_uri(void *, uschar * mod);
36 extern uschar * tls_cert_ext_by_oid(void *, uschar *, int);
37 extern uschar * tls_cert_issuer(void *, uschar * mod);
38 extern uschar * tls_cert_not_before(void *, uschar * mod);
39 extern uschar * tls_cert_not_after(void *, uschar * mod);
40 extern uschar * tls_cert_ocsp_uri(void *, uschar * mod);
41 extern uschar * tls_cert_serial_number(void *, uschar * mod);
42 extern uschar * tls_cert_signature(void *, uschar * mod);
43 extern uschar * tls_cert_signature_algorithm(void *, uschar * mod);
44 extern uschar * tls_cert_subject(void *, uschar * mod);
45 extern uschar * tls_cert_subject_altname(void *, uschar * mod);
46 extern uschar * tls_cert_version(void *, uschar * mod);
48 extern uschar * tls_cert_der_b64(void * cert);
49 extern uschar * tls_cert_fprt_md5(void *);
50 extern uschar * tls_cert_fprt_sha1(void *);
51 extern uschar * tls_cert_fprt_sha256(void *);
53 extern void tls_clean_env(void);
54 extern BOOL tls_client_start(client_conn_ctx *, smtp_connect_args *,
55 void *, tls_support *, uschar **);
56 extern void tls_client_creds_reload(BOOL);
58 extern void tls_close(void *, int);
59 extern BOOL tls_could_read(void);
60 extern void tls_daemon_init(void);
61 extern void tls_daemon_tick(void);
62 extern BOOL tls_dropprivs_validate_require_cipher(BOOL);
63 extern BOOL tls_export_cert(uschar *, size_t, void *);
64 extern int tls_feof(void);
65 extern int tls_ferror(void);
66 extern void tls_free_cert(void **);
67 extern int tls_getc(unsigned);
68 extern uschar *tls_getbuf(unsigned *);
69 extern void tls_get_cache(void);
70 extern BOOL tls_import_cert(const uschar *, void **);
71 extern int tls_read(void *, uschar *, size_t);
72 extern int tls_server_start(uschar **);
73 extern BOOL tls_smtp_buffered(void);
74 extern int tls_ungetc(int);
75 extern int tls_write(void *, const uschar *, size_t, BOOL);
76 extern uschar *tls_validate_require_cipher(void);
77 extern void tls_version_report(FILE *);
79 extern BOOL tls_openssl_options_parse(uschar *, long *);
81 extern uschar * tls_field_from_dn(uschar *, const uschar *);
82 extern BOOL tls_is_name_for_cert(const uschar *, void *);
85 extern int tlsa_lookup(const host_item *, dns_answer *, BOOL);
88 #endif /*DISABLE_TLS*/
91 /* Everything else... */
93 extern acl_block *acl_read(uschar *(*)(void), uschar **);
94 extern int acl_check(int, uschar *, uschar *, uschar **, uschar **);
95 extern int acl_eval(int, uschar *, uschar **, uschar **);
97 extern tree_node *acl_var_create(uschar *);
98 extern void acl_var_write(uschar *, uschar *, void *);
100 #ifdef EXPERIMENTAL_ARC
101 extern void *arc_ams_setup_sign_bodyhash(void);
102 extern const uschar *arc_header_feed(gstring *, BOOL);
103 extern gstring *arc_sign(const uschar *, gstring *, uschar **);
104 extern void arc_sign_init(void);
105 extern const uschar *acl_verify_arc(void);
106 extern uschar * fn_arc_domains(void);
109 extern void assert_no_variables(void *, int, const char *, int);
110 extern int auth_call_pam(const uschar *, uschar **);
111 extern int auth_call_pwcheck(uschar *, uschar **);
112 extern int auth_call_radius(const uschar *, uschar **);
113 extern int auth_call_saslauthd(const uschar *, const uschar *,
114 const uschar *, const uschar *, uschar **);
115 extern int auth_check_serv_cond(auth_instance *);
116 extern int auth_check_some_cond(auth_instance *, uschar *, uschar *, int);
117 extern int auth_client_item(void *, auth_instance *, const uschar **,
118 unsigned, int, uschar *, int);
121 extern int auth_get_data(uschar **, const uschar *, int);
122 extern int auth_get_no64_data(uschar **, uschar *);
123 extern int auth_prompt(const uschar *);
124 extern int auth_read_input(const uschar *);
125 extern gstring * auth_show_supported(gstring *);
126 extern uschar *auth_xtextencode(uschar *, int);
127 extern int auth_xtextdecode(uschar *, uschar **);
129 #ifdef EXPERIMENTAL_ARC
130 extern gstring *authres_arc(gstring *);
133 extern gstring *authres_dkim(gstring *);
136 extern gstring *authres_dmarc(gstring *);
138 extern gstring *authres_smtpauth(gstring *);
140 extern gstring *authres_spf(gstring *);
143 extern uschar *b64encode(const uschar *, int);
144 extern uschar *b64encode_taint(const uschar *, int, BOOL);
145 extern int b64decode(const uschar *, uschar **);
146 extern int bdat_getc(unsigned);
147 extern uschar *bdat_getbuf(unsigned *);
148 extern int bdat_ungetc(int);
149 extern void bdat_flush_data(void);
151 extern void bits_clear(unsigned int *, size_t, int *);
152 extern void bits_set(unsigned int *, size_t, int *);
154 extern void cancel_cutthrough_connection(BOOL, const uschar *);
155 extern gstring *cat_file(FILE *, gstring *, uschar *);
156 extern gstring *cat_file_tls(void *, gstring *, uschar *);
157 extern int check_host(void *, const uschar *, const uschar **, uschar **);
158 extern uschar **child_exec_exim(int, BOOL, int *, BOOL, int, ...);
159 extern pid_t child_open_exim_function(int *, const uschar *);
160 extern pid_t child_open_exim2_function(int *, uschar *, uschar *,
162 extern pid_t child_open_function(uschar **, uschar **, int,
163 int *, int *, BOOL, const uschar *);
164 extern pid_t child_open_uid(const uschar **, const uschar **, int,
165 uid_t *, gid_t *, int *, int *, uschar *, BOOL, const uschar *);
166 extern BOOL cleanup_environment(void);
167 extern void cutthrough_data_puts(uschar *, int);
168 extern void cutthrough_data_put_nl(void);
169 extern uschar *cutthrough_finaldot(void);
170 extern BOOL cutthrough_flush_send(void);
171 extern BOOL cutthrough_headers_send(void);
172 extern BOOL cutthrough_predata(void);
173 extern void release_cutthrough_connection(const uschar *);
175 extern void daemon_go(void);
177 #ifdef EXPERIMENTAL_DCC
178 extern int dcc_process(uschar **);
181 extern void debug_logging_activate(uschar *, uschar *);
182 extern void debug_logging_stop(void);
183 extern void debug_print_argv(const uschar **);
184 extern void debug_print_ids(uschar *);
185 extern void debug_printf_indent(const char *, ...) PRINTF_FUNCTION(1,2);
186 extern void debug_print_string(uschar *);
187 extern void debug_print_tree(const char *, tree_node *);
188 extern void debug_vprintf(int, const char *, va_list);
189 extern void debug_print_socket(int);
191 extern void decode_bits(unsigned int *, size_t, int *,
192 uschar *, bit_table *, int, uschar *, int);
193 extern void delete_pid_file(void);
194 extern void deliver_local(address_item *, BOOL);
195 extern address_item *deliver_make_addr(uschar *, BOOL);
196 extern void delivery_log(int, address_item *, int, uschar *);
197 extern int deliver_message(uschar *, BOOL, BOOL);
198 extern void deliver_msglog(const char *, ...) PRINTF_FUNCTION(1,2);
199 extern void deliver_set_expansions(address_item *);
200 extern int deliver_split_address(address_item *);
201 extern void deliver_succeeded(address_item *);
203 extern uschar *deliver_get_sender_address (uschar *id);
204 extern void delivery_re_exec(int);
206 extern void die_tainted(const uschar *, const uschar *, int);
207 extern BOOL directory_make(const uschar *, const uschar *, int, BOOL);
209 extern uschar *dkim_exim_query_dns_txt(const uschar *);
210 extern void dkim_exim_sign_init(void);
212 extern BOOL dkim_transport_write_message(transport_ctx *,
213 struct ob_dkim *, const uschar ** errstr);
215 extern dns_address *dns_address_from_rr(dns_answer *, dns_record *);
216 extern int dns_basic_lookup(dns_answer *, const uschar *, int);
217 extern uschar *dns_build_reverse(const uschar *);
218 extern time_t dns_expire_from_soa(dns_answer *, int);
219 extern void dns_init(BOOL, BOOL, BOOL);
220 extern BOOL dns_is_aa(const dns_answer *);
221 extern BOOL dns_is_secure(const dns_answer *);
222 extern int dns_lookup(dns_answer *, const uschar *, int, const uschar **);
223 extern void dns_pattern_init(void);
224 extern int dns_special_lookup(dns_answer *, const uschar *, int, const uschar **);
225 extern dns_record *dns_next_rr(const dns_answer *, dns_scan *, int);
226 extern uschar *dns_text_type(int);
227 extern void dscp_list_to_stream(FILE *);
228 extern BOOL dscp_lookup(const uschar *, int, int *, int *, int *);
230 extern void enq_end(uschar *);
231 extern BOOL enq_start(uschar *, unsigned);
232 #ifndef DISABLE_EVENT
233 extern uschar *event_raise(uschar *, const uschar *, uschar *);
234 extern void msg_event_raise(const uschar *, const address_item *);
237 extern int exim_chown_failure(int, const uschar*, uid_t, gid_t);
238 extern const uschar * exim_errstr(int);
239 extern void exim_exit(int) NORETURN;
240 extern void exim_gettime(struct timeval *);
241 extern void exim_nullstd(void);
242 extern void exim_setugid(uid_t, gid_t, BOOL, uschar *);
243 extern void exim_underbar_exit(int) NORETURN;
244 extern void exim_wait_tick(struct timeval *, int);
245 extern int exp_bool(address_item *addr,
246 uschar *mtype, uschar *mname, unsigned dgb_opt, uschar *oname, BOOL bvalue,
247 uschar *svalue, BOOL *rvalue);
248 extern BOOL expand_check_condition(uschar *, uschar *, uschar *);
249 extern uschar *expand_file_big_buffer(const uschar *);
250 extern uschar *expand_string(uschar *); /* public, cannot make const */
251 extern const uschar *expand_cstring(const uschar *); /* ... so use this one */
252 extern uschar *expand_getkeyed(const uschar *, const uschar *);
254 extern uschar *expand_hide_passwords(uschar * );
255 extern uschar *expand_string_copy(const uschar *);
256 extern int_eximarith_t expand_string_integer(uschar *, BOOL);
257 extern void modify_variable(uschar *, void *);
259 extern BOOL fd_ready(int, time_t);
261 extern int filter_interpret(uschar *, int, address_item **, uschar **);
262 extern BOOL filter_personal(string_item *, BOOL);
263 extern BOOL filter_runtest(int, uschar *, BOOL, BOOL);
264 extern BOOL filter_system_interpret(address_item **, uschar **);
266 extern uschar * fn_hdrs_added(void);
267 extern void force_fd(int, int);
269 extern void header_add(int, const char *, ...);
270 extern header_line *header_add_at_position_internal(BOOL, uschar *, BOOL, int, const char *, ...);
271 extern int header_checkname(header_line *, BOOL);
272 extern BOOL header_match(uschar *, BOOL, BOOL, string_item *, int, ...);
273 extern int host_address_extract_port(uschar *);
274 extern uschar *host_and_ident(BOOL);
275 extern int host_aton(const uschar *, int *);
276 extern void host_build_hostlist(host_item **, const uschar *, BOOL);
277 extern ip_address_item *host_build_ifacelist(const uschar *, uschar *);
278 extern void host_build_log_info(void);
279 extern void host_build_sender_fullhost(void);
280 extern int host_find_byname(host_item *, const uschar *, int,
281 const uschar **, BOOL);
282 extern int host_find_bydns(host_item *, const uschar *, int, uschar *, uschar *,
283 uschar *, const dnssec_domains *, const uschar **, BOOL *);
284 extern ip_address_item *host_find_interfaces(void);
285 extern BOOL host_is_in_net(const uschar *, const uschar *, int);
286 extern BOOL host_is_tls_on_connect_port(int);
287 extern int host_item_get_port(host_item *);
288 extern void host_mask(int, int *, int);
289 extern int host_name_lookup(void);
290 extern int host_nmtoa(int, int *, int, uschar *, int);
291 extern uschar *host_ntoa(int, const void *, uschar *, int *);
292 extern int host_scan_for_local_hosts(host_item *, host_item **, BOOL *);
294 extern uschar *imap_utf7_encode(uschar *, const uschar *,
295 uschar, uschar *, uschar **);
297 extern void invert_address(uschar *, uschar *);
298 extern int ip_addr(void *, int, const uschar *, int);
299 extern int ip_bind(int, int, uschar *, int);
300 extern int ip_connect(int, int, const uschar *, int, int, const blob *);
301 extern int ip_connectedsocket(int, const uschar *, int, int,
302 int, host_item *, uschar **, const blob *);
303 extern int ip_get_address_family(int);
304 extern void ip_keepalive(int, const uschar *, BOOL);
305 extern int ip_recv(client_conn_ctx *, uschar *, int, time_t);
306 extern int ip_socket(int, int);
308 extern int ip_tcpsocket(const uschar *, uschar **, int, host_item *);
309 extern int ip_unixsocket(const uschar *, uschar **);
310 extern int ip_streamsocket(const uschar *, uschar **, int, host_item *);
312 extern int ipv6_nmtoa(int *, uschar *);
314 extern uschar *local_part_quote(uschar *);
315 extern int log_create(uschar *);
316 extern int log_create_as_exim(uschar *);
317 extern void log_close_all(void);
319 extern macro_item * macro_create(const uschar *, const uschar *, BOOL);
320 extern BOOL macro_read_assignment(uschar *);
321 extern uschar *macros_expand(int, int *, BOOL *);
322 extern void mainlog_close(void);
323 #ifdef WITH_CONTENT_SCAN
324 extern int malware(const uschar *, int);
325 extern int malware_in_file(uschar *);
326 extern void malware_init(void);
327 extern gstring * malware_show_supported(gstring *);
329 extern int match_address_list(const uschar *, BOOL, BOOL, const uschar **,
330 unsigned int *, int, int, const uschar **);
331 extern int match_address_list_basic(const uschar *, const uschar **, int);
332 extern int match_check_list(const uschar **, int, tree_node **, unsigned int **,
333 int(*)(void *, const uschar *, const uschar **, uschar **), void *, int,
334 const uschar *, const uschar **);
335 extern int match_isinlist(const uschar *, const uschar **, int, tree_node **,
336 unsigned int *, int, BOOL, const uschar **);
337 extern int match_check_string(const uschar *, const uschar *, int, BOOL, BOOL, BOOL,
339 extern void md5_end(md5 *, const uschar *, int, uschar *);
340 extern void md5_mid(md5 *, const uschar *);
341 extern void md5_start(md5 *);
342 extern void millisleep(int);
343 #ifdef WITH_CONTENT_SCAN
344 struct mime_boundary_context;
345 extern int mime_acl_check(uschar *acl, FILE *f,
346 struct mime_boundary_context *, uschar **, uschar **);
347 extern int mime_decode(const uschar **);
348 extern ssize_t mime_decode_base64(FILE *, FILE *, uschar *);
349 extern int mime_regex(const uschar **);
350 extern void mime_set_anomaly(int);
352 extern uschar *moan_check_errorcopy(uschar *);
353 extern BOOL moan_skipped_syntax_errors(uschar *, error_block *, uschar *,
355 extern void moan_smtp_batch(uschar *, const char *, ...) PRINTF_FUNCTION(2,3);
356 extern BOOL moan_send_message(uschar *, int, error_block *eblock,
357 header_line *, FILE *, uschar *);
358 extern void moan_tell_someone(uschar *, address_item *,
359 const uschar *, const char *, ...) PRINTF_FUNCTION(4,5);
360 extern BOOL moan_to_sender(int, error_block *, header_line *, FILE *, BOOL);
361 extern void moan_write_from(FILE *);
362 extern void moan_write_references(FILE *, uschar *);
363 extern FILE *modefopen(const uschar *, const char *, mode_t);
365 extern int open_cutthrough_connection( address_item * addr );
367 extern uschar *parse_extract_address(uschar *, uschar **, int *, int *, int *,
369 extern int parse_forward_list(uschar *, int, address_item **, uschar **,
370 const uschar *, uschar *, error_block **);
371 extern uschar *parse_find_address_end(uschar *, BOOL);
372 extern uschar *parse_find_at(uschar *);
373 extern const uschar *parse_fix_phrase(const uschar *, int);
374 extern uschar *parse_message_id(uschar *, uschar **, uschar **);
375 extern const uschar *parse_quote_2047(const uschar *, int, uschar *, BOOL);
376 extern uschar *parse_date_time(uschar *str, time_t *t);
377 extern int vaguely_random_number(int);
379 extern int vaguely_random_number_fallback(int);
382 extern BOOL queue_action(uschar *, int, uschar **, int, int);
383 extern void queue_check_only(void);
384 extern unsigned queue_count(void);
385 extern unsigned queue_count_cached(void);
386 extern void queue_list(int, uschar **, int);
387 #ifndef DISABLE_QUEUE_RAMP
388 extern void queue_notify_daemon(const uschar * hostname);
390 extern void queue_run(uschar *, uschar *, BOOL);
392 extern int random_number(int);
393 extern const uschar *rc_to_string(int);
394 extern int rda_interpret(redirect_block *, int, uschar *, uschar *,
395 uschar *, uschar *, uschar *, ugid_block *, address_item **,
396 uschar **, error_block **, int *, uschar *);
397 extern int rda_is_filter(const uschar *);
398 extern BOOL readconf_depends(driver_instance *, uschar *);
399 extern void readconf_driver_init(uschar *, driver_instance **,
400 driver_info *, int, void *, int, optionlist *, int);
401 extern uschar *readconf_find_option(void *);
402 extern void readconf_main(BOOL);
403 extern void readconf_options_from_list(optionlist *, unsigned, const uschar *, uschar *);
404 extern BOOL readconf_print(uschar *, uschar *, BOOL);
405 extern uschar *readconf_printtime(int);
406 extern uschar *readconf_readname(uschar *, int, uschar *);
407 extern int readconf_readtime(const uschar *, int, BOOL);
408 extern void readconf_rest(void);
409 extern uschar *readconf_retry_error(const uschar *, const uschar *, int *, int *);
410 extern void readconf_save_config(const uschar *);
411 extern void read_message_body(BOOL);
412 extern void receive_bomb_out(uschar *, uschar *) NORETURN;
413 extern BOOL receive_check_fs(int);
414 extern BOOL receive_check_set_sender(uschar *);
415 extern BOOL receive_msg(BOOL);
416 extern int_eximarith_t receive_statvfs(BOOL, int *);
417 extern void receive_swallow_smtp(void);
418 #ifdef WITH_CONTENT_SCAN
419 extern int regex(const uschar **);
421 extern BOOL regex_match_and_setup(const pcre *, const uschar *, int, int);
422 extern const pcre *regex_must_compile(const uschar *, BOOL, BOOL);
423 extern void retry_add_item(address_item *, uschar *, int);
424 extern BOOL retry_check_address(const uschar *, host_item *, uschar *, BOOL,
425 uschar **, uschar **);
426 extern retry_config *retry_find_config(const uschar *, const uschar *, int, int);
427 extern BOOL retry_ultimate_address_timeout(uschar *, const uschar *,
428 dbdata_retry *, time_t);
429 extern void retry_update(address_item **, address_item **, address_item **);
430 extern uschar *rewrite_address(uschar *, BOOL, BOOL, rewrite_rule *, int);
431 extern uschar *rewrite_address_qualify(uschar *, BOOL);
432 extern header_line *rewrite_header(header_line *,
433 const uschar *, const uschar *,
434 rewrite_rule *, int, BOOL);
435 extern uschar *rewrite_one(uschar *, int, BOOL *, BOOL, uschar *,
437 extern void rewrite_test(uschar *);
438 extern uschar *rfc2047_decode2(uschar *, BOOL, uschar *, int, int *, int *,
440 extern int route_address(address_item *, address_item **, address_item **,
441 address_item **, address_item **, int);
442 extern int route_check_prefix(const uschar *, const uschar *, unsigned *);
443 extern int route_check_suffix(const uschar *, const uschar *, unsigned *);
444 extern BOOL route_findgroup(uschar *, gid_t *);
445 extern BOOL route_finduser(const uschar *, struct passwd **, uid_t *);
446 extern BOOL route_find_expanded_group(uschar *, uschar *, uschar *, gid_t *,
448 extern BOOL route_find_expanded_user(uschar *, uschar *, uschar *,
449 struct passwd **, uid_t *, uschar **);
450 extern void route_init(void);
451 extern gstring * route_show_supported(gstring *);
452 extern void route_tidyup(void);
454 extern uschar *search_args(int, uschar *, uschar *, uschar **, const uschar *);
455 extern uschar *search_find(void *, const uschar *, uschar *, int,
456 const uschar *, int, int, int *, const uschar *);
457 extern int search_findtype(const uschar *, int);
458 extern int search_findtype_partial(const uschar *, int *, const uschar **, int *,
459 int *, const uschar **);
460 extern void *search_open(const uschar *, int, int, uid_t *, gid_t *);
461 extern void search_tidyup(void);
462 extern void set_process_info(const char *, ...) PRINTF_FUNCTION(1,2);
463 extern void sha1_end(hctx *, const uschar *, int, uschar *);
464 extern void sha1_mid(hctx *, const uschar *);
465 extern void sha1_start(hctx *);
466 extern int sieve_interpret(uschar *, int, uschar *, uschar *, uschar *,
467 uschar *, address_item **, uschar **);
468 extern void sigalrm_handler(int);
469 extern BOOL smtp_buffered(void);
470 extern void smtp_closedown(uschar *);
471 extern void smtp_command_timeout_exit(void) NORETURN;
472 extern void smtp_command_sigterm_exit(void) NORETURN;
473 extern void smtp_data_timeout_exit(void) NORETURN;
474 extern void smtp_data_sigint_exit(void) NORETURN;
475 extern void smtp_deliver_init(void);
476 extern uschar *smtp_cmd_hist(void);
477 extern int smtp_connect(smtp_connect_args *, const blob *);
478 extern int smtp_sock_connect(host_item *, int, int, uschar *,
479 transport_instance * tb, int, const blob *);
480 extern int smtp_feof(void);
481 extern int smtp_ferror(void);
482 extern uschar *smtp_get_connection_info(void);
483 extern BOOL smtp_get_interface(uschar *, int, address_item *,
484 uschar **, uschar *);
485 extern BOOL smtp_get_port(uschar *, address_item *, int *, uschar *);
486 extern int smtp_getc(unsigned);
487 extern uschar *smtp_getbuf(unsigned *);
488 extern void smtp_get_cache(void);
489 extern int smtp_handle_acl_fail(int, int, uschar *, uschar *);
490 extern void smtp_log_no_mail(void);
491 extern void smtp_message_code(uschar **, int *, uschar **, uschar **, BOOL);
492 extern void smtp_proxy_tls(void *, uschar *, size_t, int *, int) NORETURN;
493 extern BOOL smtp_read_response(void *, uschar *, int, int, int);
494 extern void *smtp_reset(void *);
495 extern void smtp_respond(uschar *, int, BOOL, uschar *);
496 extern void smtp_notquit_exit(uschar *, uschar *, uschar *, ...);
497 extern void smtp_port_for_connect(host_item *, int);
498 extern void smtp_send_prohibition_message(int, uschar *);
499 extern int smtp_setup_msg(void);
500 extern BOOL smtp_start_session(void);
501 extern int smtp_ungetc(int);
502 extern BOOL smtp_verify_helo(void);
503 extern int smtp_write_command(void *, int, const char *, ...) PRINTF_FUNCTION(3,4);
504 #ifdef WITH_CONTENT_SCAN
505 extern int spam(const uschar **);
506 extern FILE *spool_mbox(unsigned long *, const uschar *, uschar **);
508 extern void spool_clear_header_globals(void);
509 extern BOOL spool_move_message(uschar *, uschar *, uschar *, uschar *);
510 extern int spool_open_datafile(uschar *);
511 extern int spool_open_temp(uschar *);
512 extern int spool_read_header(uschar *, BOOL, BOOL);
513 extern int spool_write_header(uschar *, int, uschar **);
514 extern int stdin_getc(unsigned);
515 extern int stdin_feof(void);
516 extern int stdin_ferror(void);
517 extern int stdin_ungetc(int);
519 extern void store_exit(void);
520 extern gstring *string_append(gstring *, int, ...) WARN_UNUSED_RESULT;
521 extern gstring *string_append_listele(gstring *, uschar, const uschar *) WARN_UNUSED_RESULT;
522 extern gstring *string_append_listele_n(gstring *, uschar, const uschar *, unsigned) WARN_UNUSED_RESULT;
523 extern gstring *string_append2_listele_n(gstring *, const uschar *, const uschar *, unsigned) WARN_UNUSED_RESULT;
524 extern uschar *string_base62(unsigned long int);
525 extern gstring *string_cat (gstring *, const uschar * ) WARN_UNUSED_RESULT;
526 extern gstring *string_catn(gstring *, const uschar *, int) WARN_UNUSED_RESULT;
527 extern int string_compare_by_pointer(const void *, const void *);
528 extern uschar *string_copy_dnsdomain(uschar *);
529 extern uschar *string_copy_malloc(const uschar *);
530 extern uschar *string_dequote(const uschar **);
531 extern uschar *string_format_size(int, uschar *);
532 extern int string_interpret_escape(const uschar **);
533 extern int string_is_ip_address(const uschar *, int *);
535 extern BOOL string_is_utf8(const uschar *);
537 extern const uschar *string_printing2(const uschar *, int);
538 extern uschar *string_split_message(uschar *);
539 extern uschar *string_unprinting(uschar *);
541 extern uschar *string_address_utf8_to_alabel(const uschar *, uschar **);
542 extern uschar *string_domain_alabel_to_utf8(const uschar *, uschar **);
543 extern uschar *string_domain_utf8_to_alabel(const uschar *, uschar **);
544 extern uschar *string_localpart_alabel_to_utf8(const uschar *, uschar **);
545 extern uschar *string_localpart_utf8_to_alabel(const uschar *, uschar **);
548 #define string_format(buf, siz, fmt, ...) \
549 string_format_trc(buf, siz, US __FUNCTION__, __LINE__, fmt, __VA_ARGS__)
550 extern BOOL string_format_trc(uschar *, int, const uschar *, unsigned,
551 const char *, ...) ALMOST_PRINTF(5,6);
553 #define string_vformat(g, flgs, fmt, ap) \
554 string_vformat_trc(g, US __FUNCTION__, __LINE__, \
555 STRING_SPRINTF_BUFFER_SIZE, flgs, fmt, ap)
556 extern gstring *string_vformat_trc(gstring *, const uschar *, unsigned,
557 unsigned, unsigned, const char *, va_list);
559 #define string_open_failed(fmt, ...) \
560 string_open_failed_trc(US __FUNCTION__, __LINE__, fmt, __VA_ARGS__)
561 extern uschar *string_open_failed_trc(const uschar *, unsigned,
562 const char *, ...) PRINTF_FUNCTION(3,4);
564 #define string_nextinlist(lp, sp, b, l) \
565 string_nextinlist_trc((lp), (sp), (b), (l), US __FUNCTION__, __LINE__)
566 extern uschar *string_nextinlist_trc(const uschar **listptr, int *separator, uschar *buffer, int buflen,
567 const uschar * func, int line);
569 extern int strcmpic(const uschar *, const uschar *);
570 extern int strncmpic(const uschar *, const uschar *, int);
571 extern uschar *strstric(uschar *, uschar *, BOOL);
573 extern int test_harness_fudged_queue_time(int);
574 extern void tcp_init(void);
575 #ifdef EXIM_TFO_PROBE
576 extern void tfo_probe(void);
578 extern void tls_modify_variables(tls_support *);
579 extern uschar *tod_stamp(int);
581 extern BOOL transport_check_waiting(const uschar *, const uschar *, int, uschar *,
583 extern void transport_init(void);
584 extern void transport_do_pass_socket(const uschar *, const uschar *,
585 const uschar *, uschar *, int);
586 extern BOOL transport_pass_socket(const uschar *, const uschar *, const uschar *, uschar *,
588 extern uschar *transport_rcpt_address(address_item *, BOOL);
589 extern BOOL transport_set_up_command(const uschar ***, uschar *,
590 BOOL, int, address_item *, uschar *, uschar **);
591 extern void transport_update_waiting(host_item *, uschar *);
592 extern BOOL transport_write_block(transport_ctx *, uschar *, int, BOOL);
593 extern void transport_write_reset(int);
594 extern BOOL transport_write_string(int, const char *, ...);
595 extern BOOL transport_headers_send(transport_ctx *,
596 BOOL (*)(transport_ctx *, uschar *, int));
597 extern gstring * transport_show_supported(gstring *);
598 extern BOOL transport_write_message(transport_ctx *, int);
599 extern void tree_add_duplicate(uschar *, address_item *);
600 extern void tree_add_nonrecipient(uschar *);
601 extern void tree_add_unusable(host_item *);
602 extern void tree_dup(tree_node **, tree_node *);
603 extern int tree_insertnode(tree_node **, tree_node *);
604 extern tree_node *tree_search(tree_node *, const uschar *);
605 extern void tree_write(tree_node *, FILE *);
606 extern void tree_walk(tree_node *, void (*)(uschar*, uschar*, void*), void *);
608 #ifdef WITH_CONTENT_SCAN
609 extern void unspool_mbox(void);
612 extern void utf8_version_report(FILE *);
615 extern int verify_address(address_item *, FILE *, int, int, int, int,
616 uschar *, uschar *, BOOL *);
617 extern int verify_check_dnsbl(int, const uschar **, uschar **);
618 extern int verify_check_header_address(uschar **, uschar **, int, int, int,
619 uschar *, uschar *, int, int *);
620 extern int verify_check_headers(uschar **);
621 extern int verify_check_header_names_ascii(uschar **);
622 extern int verify_check_host(uschar **);
623 extern int verify_check_notblind(BOOL);
624 extern int verify_check_given_host(const uschar **, const host_item *);
625 extern int verify_check_this_host(const uschar **, unsigned int *,
626 const uschar*, const uschar *, const uschar **);
627 extern address_item *verify_checked_sender(uschar *);
628 extern void verify_get_ident(int);
629 extern void verify_quota(uschar *);
630 extern int verify_quota_call(const uschar *, int, int, uschar **);
631 extern BOOL verify_sender(int *, uschar **);
632 extern BOOL verify_sender_preliminary(int *, uschar **);
633 extern void version_init(void);
635 extern BOOL write_chunk(transport_ctx *, uschar *, int);
636 extern ssize_t write_to_fd_buf(int, const uschar *, size_t);
639 /******************************************************************************/
640 /* Predicate: if an address is in a tainted pool.
641 By extension, a variable pointing to this address is tainted.
645 is_tainted(const void * p)
647 #if defined(COMPILE_UTILITY) || defined(MACRO_PREDEF) || defined(EM_VERSION_C)
651 extern BOOL is_tainted_fn(const void *);
652 return is_tainted_fn(p);
656 /******************************************************************************/
657 /* String functions */
658 static inline uschar * __Ustrcat(uschar * dst, const uschar * src, const char * func, int line)
660 #if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
661 if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrcat", CUS func, line);
663 return US strcat(CS dst, CCS src);
665 static inline uschar * __Ustrcpy(uschar * dst, const uschar * src, const char * func, int line)
667 #if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
668 if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrcpy", CUS func, line);
670 return US strcpy(CS dst, CCS src);
672 static inline uschar * __Ustrncat(uschar * dst, const uschar * src, size_t n, const char * func, int line)
674 #if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
675 if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrncat", CUS func, line);
677 return US strncat(CS dst, CCS src, n);
679 static inline uschar * __Ustrncpy(uschar * dst, const uschar * src, size_t n, const char * func, int line)
681 #if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
682 if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrncpy", CUS func, line);
684 return US strncpy(CS dst, CCS src, n);
686 /*XXX will likely need unchecked copy also */
689 /* Advance the string pointer given over any whitespace.
690 Return the next char as there's enought places using it to be useful. */
692 #define Uskip_whitespace(sp) skip_whitespace(CUSS sp)
694 static inline uschar skip_whitespace(const uschar ** sp)
695 { while (isspace(**sp)) (*sp)++; return **sp; }
698 /******************************************************************************/
700 #if !defined(MACRO_PREDEF) && !defined(COMPILE_UTILITY)
701 /* exim_chown - in some NFSv4 setups *seemes* to be an issue with
702 chown(<exim-uid>, <exim-gid>).
704 Probably because the idmapping is broken, misconfigured or set up in
705 an unusal way. (see Bug 2931). As I'm not sure, if this was a single
706 case of misconfiguration, or if there are more such broken systems
707 out, I try to impose as least impact as possible and for now just write
708 a panic log entry pointing to the bug report. You're encouraged to
709 contact the developers, if you experience this issue.
711 fd the file descriptor (or -1 if not valid)
712 name the file name for error messages or for file operations,
717 returns 0 on success, -1 on failure */
720 exim_fchown(int fd, uid_t owner, gid_t group, const uschar *name)
722 return fchown(fd, owner, group)
723 ? exim_chown_failure(fd, name, owner, group) : 0;
727 exim_chown(const uschar *name, uid_t owner, gid_t group)
729 return chown(CCS name, owner, group)
730 ? exim_chown_failure(-1, name, owner, group) : 0;
732 #endif /* !MACRO_PREDEF && !COMPILE_UTILITY */
734 /******************************************************************************/
735 /* String functions */
737 #if !defined(MACRO_PREDEF)
738 /*************************************************
739 * Copy and save string *
740 *************************************************/
742 /* This function assumes that memcpy() is faster than strcpy().
743 The result is explicitly nul-terminated.
746 static inline uschar *
747 string_copyn_taint_trc(const uschar * s, unsigned len,
748 BOOL tainted, const char * func, int line)
750 uschar * ss = store_get_3(len + 1, tainted, func, line);
756 static inline uschar *
757 string_copy_taint_trc(const uschar * s, BOOL tainted, const char * func, int line)
758 { return string_copyn_taint_trc(s, Ustrlen(s), tainted, func, line); }
760 static inline uschar *
761 string_copyn_trc(const uschar * s, unsigned len, const char * func, int line)
762 { return string_copyn_taint_trc(s, len, is_tainted(s), func, line); }
763 static inline uschar *
764 string_copy_trc(const uschar * s, const char * func, int line)
765 { return string_copy_taint_trc(s, is_tainted(s), func, line); }
768 /* String-copy functions explicitly setting the taint status */
770 #define string_copyn_taint(s, len, tainted) \
771 string_copyn_taint_trc((s), (len), (tainted), __FUNCTION__, __LINE__)
772 #define string_copy_taint(s, tainted) \
773 string_copy_taint_trc((s), (tainted), __FUNCTION__, __LINE__)
775 /* Simple string-copy functions maintaining the taint */
777 #define string_copyn(s, len) \
778 string_copyn_trc((s), (len), __FUNCTION__, __LINE__)
779 #define string_copy(s) \
780 string_copy_trc((s), __FUNCTION__, __LINE__)
783 /*************************************************
784 * Copy, lowercase and save string *
785 *************************************************/
788 Argument: string to copy
789 Returns: copy of string in new store, with letters lowercased
792 static inline uschar *
793 string_copylc(const uschar *s)
795 uschar *ss = store_get(Ustrlen(s) + 1, is_tainted(s));
797 while (*s != 0) *p++ = tolower(*s++);
804 /*************************************************
805 * Copy, lowercase, and save string, given length *
806 *************************************************/
808 /* It is assumed the data contains no zeros. A zero is added
813 n number of characters
815 Returns: copy of string in new store, with letters lowercased
818 static inline uschar *
819 string_copynlc(uschar *s, int n)
821 uschar *ss = store_get(n + 1, is_tainted(s));
823 while (n-- > 0) *p++ = tolower(*s++);
829 # ifndef COMPILE_UTILITY
830 /*************************************************
831 * Copy and save string in longterm store *
832 *************************************************/
834 /* This function assumes that memcpy() is faster than strcpy().
836 Argument: string to copy
837 Returns: copy of string in new store
840 static inline uschar *
841 string_copy_perm(const uschar *s, BOOL force_taint)
843 int old_pool = store_pool;
844 int len = Ustrlen(s) + 1;
847 store_pool = POOL_PERM;
848 ss = store_get(len, force_taint || is_tainted(s));
850 store_pool = old_pool;
857 /* sprintf into a buffer, taint-unchecked */
860 string_format_nt(uschar * buf, int siz, const char * fmt, ...)
862 gstring gs = { .size = siz, .ptr = 0, .s = buf };
865 (void) string_vformat(&gs, SVFMT_TAINT_NOCHK, fmt, ap);
871 /******************************************************************************/
872 /* Growable-string functions */
874 /* Create a growable-string with some preassigned space */
876 #define string_get_tainted(size, tainted) \
877 string_get_tainted_trc((size), (tainted), __FUNCTION__, __LINE__)
879 static inline gstring *
880 string_get_tainted_trc(unsigned size, BOOL tainted, const char * func, unsigned line)
882 gstring * g = store_get_3(sizeof(gstring) + size, tainted, func, line);
889 #define string_get(size) \
890 string_get_trc((size), __FUNCTION__, __LINE__)
892 static inline gstring *
893 string_get_trc(unsigned size, const char * func, unsigned line)
895 return string_get_tainted_trc(size, FALSE, func, line);
898 /* NUL-terminate the C string in the growable-string, and return it. */
900 static inline uschar *
901 string_from_gstring(gstring * g)
908 static inline unsigned
909 gstring_length(const gstring * g)
911 return g ? (unsigned)g->ptr : 0;
915 #define gstring_release_unused(g) \
916 gstring_release_unused_trc(g, __FUNCTION__, __LINE__)
919 gstring_release_unused_trc(gstring * g, const char * file, unsigned line)
921 if (g) store_release_above_3(g->s + (g->size = g->ptr + 1), file, line);
925 /* sprintf-append to a growable-string */
927 #define string_fmt_append(g, fmt, ...) \
928 string_fmt_append_f_trc(g, US __FUNCTION__, __LINE__, \
929 SVFMT_EXTEND|SVFMT_REBUFFER, fmt, __VA_ARGS__)
931 #define string_fmt_append_f(g, flgs, fmt, ...) \
932 string_fmt_append_f_trc(g, US __FUNCTION__, __LINE__, \
933 flgs, fmt, __VA_ARGS__)
935 static inline gstring *
936 string_fmt_append_f_trc(gstring * g, const uschar * func, unsigned line,
937 unsigned flags, const char *format, ...)
940 va_start(ap, format);
941 g = string_vformat_trc(g, func, line, STRING_SPRINTF_BUFFER_SIZE,
948 /* Copy the content of a string to tainted memory */
951 gstring_rebuffer(gstring * g)
953 uschar * s = store_get(g->size, TRUE);
954 memcpy(s, g->s, g->ptr);
959 /******************************************************************************/
961 #define store_get_dns_answer() store_get_dns_answer_trc(CUS __FUNCTION__, __LINE__)
963 static inline dns_answer *
964 store_get_dns_answer_trc(const uschar * func, unsigned line)
966 return store_get_3(sizeof(dns_answer), TRUE, CCS func, line); /* use tainted mem */
969 /******************************************************************************/
970 /* Routines with knowledge of spool layout */
972 # ifndef COMPILE_UTILITY
974 spool_pname_buf(uschar * buf, int len)
976 snprintf(CS buf, len, "%s/%s/input", spool_directory, queue_name);
979 static inline uschar *
980 spool_dname(const uschar * purpose, uschar * subdir)
982 return string_sprintf("%s/%s/%s/%s",
983 spool_directory, queue_name, purpose, subdir);
987 static inline uschar *
988 spool_q_sname(const uschar * purpose, const uschar * q, uschar * subdir)
990 return string_sprintf("%s%s%s%s%s",
993 *subdir ? "/" : "", subdir);
996 static inline uschar *
997 spool_sname(const uschar * purpose, uschar * subdir)
999 return spool_q_sname(purpose, queue_name, subdir);
1002 static inline uschar *
1003 spool_q_fname(const uschar * purpose, const uschar * q,
1004 const uschar * subdir, const uschar * fname, const uschar * suffix)
1006 return string_sprintf("%s/%s/%s/%s/%s%s",
1007 spool_directory, q, purpose, subdir, fname, suffix);
1010 static inline uschar *
1011 spool_fname(const uschar * purpose, const uschar * subdir, const uschar * fname,
1012 const uschar * suffix)
1014 #ifdef COMPILE_UTILITY /* version avoiding string-extension */
1015 int len = Ustrlen(spool_directory) + 1 + Ustrlen(queue_name) + 1 + Ustrlen(purpose) + 1
1016 + Ustrlen(subdir) + 1 + Ustrlen(fname) + Ustrlen(suffix) + 1;
1017 uschar * buf = store_get(len, FALSE);
1018 string_format(buf, len, "%s/%s/%s/%s/%s%s",
1019 spool_directory, queue_name, purpose, subdir, fname, suffix);
1022 return spool_q_fname(purpose, queue_name, subdir, fname, suffix);
1027 set_subdir_str(uschar * subdir_str, const uschar * name,
1028 int search_sequence)
1030 subdir_str[0] = split_spool_directory == (search_sequence == 0)
1032 subdir_str[1] = '\0';
1035 /******************************************************************************/
1036 /* Time calculations */
1039 timesince(struct timeval * diff, const struct timeval * then)
1041 gettimeofday(diff, NULL);
1042 diff->tv_sec -= then->tv_sec;
1043 if ((diff->tv_usec -= then->tv_usec) < 0)
1046 diff->tv_usec += 1000*1000;
1050 static inline uschar *
1051 string_timediff(const struct timeval * diff)
1053 static uschar buf[sizeof("0.000s")];
1055 if (diff->tv_sec >= 5 || !LOGGING(millisec))
1056 return readconf_printtime((int)diff->tv_sec);
1058 snprintf(CS buf, sizeof(buf), "%u.%03us", (uint)diff->tv_sec, (uint)diff->tv_usec/1000);
1063 static inline uschar *
1064 string_timesince(const struct timeval * then)
1066 struct timeval diff;
1067 timesince(&diff, then);
1068 return string_timediff(&diff);
1072 report_time_since(const struct timeval * t0, const uschar * where)
1074 # ifdef MEASURE_TIMING
1075 struct timeval diff;
1076 timesince(&diff, t0);
1077 fprintf(stderr, "%d %s:\t%ld.%06ld\n",
1078 (uint)getpid(), where, (long)diff.tv_sec, (long)diff.tv_usec);
1084 testharness_pause_ms(int millisec)
1086 #ifndef MEASURE_TIMING
1087 if (f.running_in_test_harness && f.testsuite_delays) millisleep(millisec);
1091 /******************************************************************************/
1092 /* Taint-checked file opens */
1095 exim_open2(const char *pathname, int flags)
1097 if (!is_tainted(pathname)) return open(pathname, flags);
1098 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1103 exim_open(const char *pathname, int flags, mode_t mode)
1105 if (!is_tainted(pathname)) return open(pathname, flags, mode);
1106 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1110 #ifdef EXIM_HAVE_OPENAT
1112 exim_openat(int dirfd, const char *pathname, int flags)
1114 if (!is_tainted(pathname)) return openat(dirfd, pathname, flags);
1115 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1120 exim_openat4(int dirfd, const char *pathname, int flags, mode_t mode)
1122 if (!is_tainted(pathname)) return openat(dirfd, pathname, flags, mode);
1123 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1129 static inline FILE *
1130 exim_fopen(const char *pathname, const char *mode)
1132 if (!is_tainted(pathname)) return fopen(pathname, mode);
1133 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1139 exim_opendir(const uschar * name)
1141 if (!is_tainted(name)) return opendir(CCS name);
1142 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted dirname '%s'", name);
1147 /******************************************************************************/
1148 # if !defined(COMPILE_UTILITY)
1149 /* Process manipulation */
1152 exim_fork(const unsigned char * purpose)
1155 DEBUG(D_any) debug_printf("%s forking for %s\n", process_purpose, purpose);
1156 if ((pid = fork()) == 0)
1158 process_purpose = purpose;
1159 DEBUG(D_any) debug_printf("postfork: %s\n", purpose);
1163 testharness_pause_ms(100); /* let child work */
1164 DEBUG(D_any) debug_printf("%s forked for %s: %d\n", process_purpose, purpose, (int)pid);
1171 child_open_exim(int * fdptr, const uschar * purpose)
1172 { return child_open_exim_function(fdptr, purpose); }
1175 child_open_exim2(int * fdptr, uschar * sender,
1176 uschar * sender_auth, const uschar * purpose)
1177 { return child_open_exim2_function(fdptr, sender, sender_auth, purpose); }
1180 child_open(uschar **argv, uschar **envp, int newumask, int *infdptr,
1181 int *outfdptr, BOOL make_leader, const uschar * purpose)
1182 { return child_open_function(argv, envp, newumask, infdptr,
1183 outfdptr, make_leader, purpose);
1186 # endif /* !COMPILE_UTILITY */
1188 /******************************************************************************/
1189 #endif /* !MACRO_PREDEF */
1191 #endif /* _FUNCTIONS_H_ */
1195 /* End of functions.h */