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 **);
57 extern void tls_close(void *, int);
58 extern BOOL tls_could_read(void);
59 extern void tls_daemon_init(void);
60 extern BOOL tls_dropprivs_validate_require_cipher(BOOL);
61 extern BOOL tls_export_cert(uschar *, size_t, void *);
62 extern int tls_feof(void);
63 extern int tls_ferror(void);
64 extern void tls_free_cert(void **);
65 extern int tls_getc(unsigned);
66 extern uschar *tls_getbuf(unsigned *);
67 extern void tls_get_cache(void);
68 extern BOOL tls_import_cert(const uschar *, void **);
69 extern int tls_read(void *, uschar *, size_t);
70 extern int tls_server_start(const uschar *, uschar **);
71 extern BOOL tls_smtp_buffered(void);
72 extern int tls_ungetc(int);
73 extern int tls_write(void *, const uschar *, size_t, BOOL);
74 extern uschar *tls_validate_require_cipher(void);
75 extern void tls_version_report(FILE *);
77 extern BOOL tls_openssl_options_parse(uschar *, long *);
79 extern uschar * tls_field_from_dn(uschar *, const uschar *);
80 extern BOOL tls_is_name_for_cert(const uschar *, void *);
83 extern int tlsa_lookup(const host_item *, dns_answer *, BOOL);
86 #endif /*DISABLE_TLS*/
89 /* Everything else... */
91 extern acl_block *acl_read(uschar *(*)(void), uschar **);
92 extern int acl_check(int, uschar *, uschar *, uschar **, uschar **);
93 extern int acl_eval(int, uschar *, uschar **, uschar **);
95 extern tree_node *acl_var_create(uschar *);
96 extern void acl_var_write(uschar *, uschar *, void *);
98 #ifdef EXPERIMENTAL_ARC
99 extern void *arc_ams_setup_sign_bodyhash(void);
100 extern const uschar *arc_header_feed(gstring *, BOOL);
101 extern gstring *arc_sign(const uschar *, gstring *, uschar **);
102 extern void arc_sign_init(void);
103 extern const uschar *acl_verify_arc(void);
104 extern uschar * fn_arc_domains(void);
107 extern void assert_no_variables(void *, int, const char *, int);
108 extern int auth_call_pam(const uschar *, uschar **);
109 extern int auth_call_pwcheck(uschar *, uschar **);
110 extern int auth_call_radius(const uschar *, uschar **);
111 extern int auth_call_saslauthd(const uschar *, const uschar *,
112 const uschar *, const uschar *, uschar **);
113 extern int auth_check_serv_cond(auth_instance *);
114 extern int auth_check_some_cond(auth_instance *, uschar *, uschar *, int);
115 extern int auth_client_item(void *, auth_instance *, const uschar **,
116 unsigned, int, uschar *, int);
119 extern int auth_get_data(uschar **, const uschar *, int);
120 extern int auth_get_no64_data(uschar **, uschar *);
121 extern int auth_prompt(const uschar *);
122 extern int auth_read_input(const uschar *);
123 extern gstring * auth_show_supported(gstring *);
124 extern uschar *auth_xtextencode(uschar *, int);
125 extern int auth_xtextdecode(uschar *, uschar **);
127 #ifdef EXPERIMENTAL_ARC
128 extern gstring *authres_arc(gstring *);
131 extern gstring *authres_dkim(gstring *);
134 extern gstring *authres_dmarc(gstring *);
136 extern gstring *authres_smtpauth(gstring *);
138 extern gstring *authres_spf(gstring *);
141 extern uschar *b64encode(const uschar *, int);
142 extern uschar *b64encode_taint(const uschar *, int, BOOL);
143 extern int b64decode(const uschar *, uschar **);
144 extern int bdat_getc(unsigned);
145 extern uschar *bdat_getbuf(unsigned *);
146 extern int bdat_ungetc(int);
147 extern void bdat_flush_data(void);
149 extern void bits_clear(unsigned int *, size_t, int *);
150 extern void bits_set(unsigned int *, size_t, int *);
152 extern void cancel_cutthrough_connection(BOOL, const uschar *);
153 extern gstring *cat_file(FILE *, gstring *, uschar *);
154 extern gstring *cat_file_tls(void *, gstring *, uschar *);
155 extern int check_host(void *, const uschar *, const uschar **, uschar **);
156 extern uschar **child_exec_exim(int, BOOL, int *, BOOL, int, ...);
157 extern pid_t child_open_exim_function(int *, const uschar *);
158 extern pid_t child_open_exim2_function(int *, uschar *, uschar *,
160 extern pid_t child_open_function(uschar **, uschar **, int,
161 int *, int *, BOOL, const uschar *);
162 extern pid_t child_open_uid(const uschar **, const uschar **, int,
163 uid_t *, gid_t *, int *, int *, uschar *, BOOL, const uschar *);
164 extern BOOL cleanup_environment(void);
165 extern void cutthrough_data_puts(uschar *, int);
166 extern void cutthrough_data_put_nl(void);
167 extern uschar *cutthrough_finaldot(void);
168 extern BOOL cutthrough_flush_send(void);
169 extern BOOL cutthrough_headers_send(void);
170 extern BOOL cutthrough_predata(void);
171 extern void release_cutthrough_connection(const uschar *);
173 extern void daemon_go(void);
175 #ifdef EXPERIMENTAL_DCC
176 extern int dcc_process(uschar **);
179 extern void debug_logging_activate(uschar *, uschar *);
180 extern void debug_logging_stop(void);
181 extern void debug_print_argv(const uschar **);
182 extern void debug_print_ids(uschar *);
183 extern void debug_printf_indent(const char *, ...) PRINTF_FUNCTION(1,2);
184 extern void debug_print_string(uschar *);
185 extern void debug_print_tree(tree_node *);
186 extern void debug_vprintf(int, const char *, va_list);
187 extern void decode_bits(unsigned int *, size_t, int *,
188 uschar *, bit_table *, int, uschar *, int);
189 extern void delete_pid_file(void);
190 extern address_item *deliver_make_addr(uschar *, BOOL);
191 extern void delivery_log(int, address_item *, int, uschar *);
192 extern int deliver_message(uschar *, BOOL, BOOL);
193 extern void deliver_msglog(const char *, ...) PRINTF_FUNCTION(1,2);
194 extern void deliver_set_expansions(address_item *);
195 extern int deliver_split_address(address_item *);
196 extern void deliver_succeeded(address_item *);
198 extern uschar *deliver_get_sender_address (uschar *id);
199 extern void delivery_re_exec(int);
201 extern void die_tainted(const uschar *, const uschar *, int);
202 extern BOOL directory_make(const uschar *, const uschar *, int, BOOL);
204 extern uschar *dkim_exim_query_dns_txt(const uschar *);
205 extern void dkim_exim_sign_init(void);
207 extern BOOL dkim_transport_write_message(transport_ctx *,
208 struct ob_dkim *, const uschar ** errstr);
210 extern dns_address *dns_address_from_rr(dns_answer *, dns_record *);
211 extern int dns_basic_lookup(dns_answer *, const uschar *, int);
212 extern uschar *dns_build_reverse(const uschar *);
213 extern time_t dns_expire_from_soa(dns_answer *, int);
214 extern void dns_init(BOOL, BOOL, BOOL);
215 extern BOOL dns_is_aa(const dns_answer *);
216 extern BOOL dns_is_secure(const dns_answer *);
217 extern int dns_lookup(dns_answer *, const uschar *, int, const uschar **);
218 extern void dns_pattern_init(void);
219 extern int dns_special_lookup(dns_answer *, const uschar *, int, const uschar **);
220 extern dns_record *dns_next_rr(const dns_answer *, dns_scan *, int);
221 extern uschar *dns_text_type(int);
222 extern void dscp_list_to_stream(FILE *);
223 extern BOOL dscp_lookup(const uschar *, int, int *, int *, int *);
225 extern void enq_end(uschar *);
226 extern BOOL enq_start(uschar *, unsigned);
227 #ifndef DISABLE_EVENT
228 extern uschar *event_raise(uschar *, const uschar *, uschar *);
229 extern void msg_event_raise(const uschar *, const address_item *);
232 extern int exim_chown_failure(int, const uschar*, uid_t, gid_t);
233 extern const uschar * exim_errstr(int);
234 extern void exim_exit(int) NORETURN;
235 extern void exim_nullstd(void);
236 extern void exim_setugid(uid_t, gid_t, BOOL, uschar *);
237 extern void exim_underbar_exit(int) NORETURN;
238 extern void exim_wait_tick(struct timeval *, int);
239 extern int exp_bool(address_item *addr,
240 uschar *mtype, uschar *mname, unsigned dgb_opt, uschar *oname, BOOL bvalue,
241 uschar *svalue, BOOL *rvalue);
242 extern BOOL expand_check_condition(uschar *, uschar *, uschar *);
243 extern uschar *expand_file_big_buffer(const uschar *);
244 extern uschar *expand_string(uschar *); /* public, cannot make const */
245 extern const uschar *expand_cstring(const uschar *); /* ... so use this one */
246 extern uschar *expand_getkeyed(const uschar *, const uschar *);
248 extern uschar *expand_hide_passwords(uschar * );
249 extern uschar *expand_string_copy(const uschar *);
250 extern int_eximarith_t expand_string_integer(uschar *, BOOL);
251 extern void modify_variable(uschar *, void *);
253 extern BOOL fd_ready(int, time_t);
255 extern int filter_interpret(uschar *, int, address_item **, uschar **);
256 extern BOOL filter_personal(string_item *, BOOL);
257 extern BOOL filter_runtest(int, uschar *, BOOL, BOOL);
258 extern BOOL filter_system_interpret(address_item **, uschar **);
260 extern uschar * fn_hdrs_added(void);
262 extern void header_add(int, const char *, ...);
263 extern header_line *header_add_at_position_internal(BOOL, uschar *, BOOL, int, const char *, ...);
264 extern int header_checkname(header_line *, BOOL);
265 extern BOOL header_match(uschar *, BOOL, BOOL, string_item *, int, ...);
266 extern int host_address_extract_port(uschar *);
267 extern uschar *host_and_ident(BOOL);
268 extern int host_aton(const uschar *, int *);
269 extern void host_build_hostlist(host_item **, const uschar *, BOOL);
270 extern ip_address_item *host_build_ifacelist(const uschar *, uschar *);
271 extern void host_build_log_info(void);
272 extern void host_build_sender_fullhost(void);
273 extern int host_find_byname(host_item *, const uschar *, int,
274 const uschar **, BOOL);
275 extern int host_find_bydns(host_item *, const uschar *, int, uschar *, uschar *,
276 uschar *, const dnssec_domains *, const uschar **, BOOL *);
277 extern ip_address_item *host_find_interfaces(void);
278 extern BOOL host_is_in_net(const uschar *, const uschar *, int);
279 extern BOOL host_is_tls_on_connect_port(int);
280 extern int host_item_get_port(host_item *);
281 extern void host_mask(int, int *, int);
282 extern int host_name_lookup(void);
283 extern int host_nmtoa(int, int *, int, uschar *, int);
284 extern uschar *host_ntoa(int, const void *, uschar *, int *);
285 extern int host_scan_for_local_hosts(host_item *, host_item **, BOOL *);
287 extern uschar *imap_utf7_encode(uschar *, const uschar *,
288 uschar, uschar *, uschar **);
290 extern void invert_address(uschar *, uschar *);
291 extern int ip_addr(void *, int, const uschar *, int);
292 extern int ip_bind(int, int, uschar *, int);
293 extern int ip_connect(int, int, const uschar *, int, int, const blob *);
294 extern int ip_connectedsocket(int, const uschar *, int, int,
295 int, host_item *, uschar **, const blob *);
296 extern int ip_get_address_family(int);
297 extern void ip_keepalive(int, const uschar *, BOOL);
298 extern int ip_recv(client_conn_ctx *, uschar *, int, time_t);
299 extern int ip_socket(int, int);
301 extern int ip_tcpsocket(const uschar *, uschar **, int, host_item *);
302 extern int ip_unixsocket(const uschar *, uschar **);
303 extern int ip_streamsocket(const uschar *, uschar **, int, host_item *);
305 extern int ipv6_nmtoa(int *, uschar *);
307 extern uschar *local_part_quote(uschar *);
308 extern int log_create(uschar *);
309 extern int log_create_as_exim(uschar *);
310 extern void log_close_all(void);
312 extern macro_item * macro_create(const uschar *, const uschar *, BOOL);
313 extern BOOL macro_read_assignment(uschar *);
314 extern uschar *macros_expand(int, int *, BOOL *);
315 extern void mainlog_close(void);
316 #ifdef WITH_CONTENT_SCAN
317 extern int malware(const uschar *, int);
318 extern int malware_in_file(uschar *);
319 extern void malware_init(void);
320 extern gstring * malware_show_supported(gstring *);
322 extern int match_address_list(const uschar *, BOOL, BOOL, const uschar **,
323 unsigned int *, int, int, const uschar **);
324 extern int match_address_list_basic(const uschar *, const uschar **, int);
325 extern int match_check_list(const uschar **, int, tree_node **, unsigned int **,
326 int(*)(void *, const uschar *, const uschar **, uschar **), void *, int,
327 const uschar *, const uschar **);
328 extern int match_isinlist(const uschar *, const uschar **, int, tree_node **,
329 unsigned int *, int, BOOL, const uschar **);
330 extern int match_check_string(const uschar *, const uschar *, int, BOOL, BOOL, BOOL,
332 extern void md5_end(md5 *, const uschar *, int, uschar *);
333 extern void md5_mid(md5 *, const uschar *);
334 extern void md5_start(md5 *);
335 extern void millisleep(int);
336 #ifdef WITH_CONTENT_SCAN
337 struct mime_boundary_context;
338 extern int mime_acl_check(uschar *acl, FILE *f,
339 struct mime_boundary_context *, uschar **, uschar **);
340 extern int mime_decode(const uschar **);
341 extern ssize_t mime_decode_base64(FILE *, FILE *, uschar *);
342 extern int mime_regex(const uschar **);
343 extern void mime_set_anomaly(int);
345 extern uschar *moan_check_errorcopy(uschar *);
346 extern BOOL moan_skipped_syntax_errors(uschar *, error_block *, uschar *,
348 extern void moan_smtp_batch(uschar *, const char *, ...) PRINTF_FUNCTION(2,3);
349 extern BOOL moan_send_message(uschar *, int, error_block *eblock,
350 header_line *, FILE *, uschar *);
351 extern void moan_tell_someone(uschar *, address_item *,
352 const uschar *, const char *, ...) PRINTF_FUNCTION(4,5);
353 extern BOOL moan_to_sender(int, error_block *, header_line *, FILE *, BOOL);
354 extern void moan_write_from(FILE *);
355 extern void moan_write_references(FILE *, uschar *);
356 extern FILE *modefopen(const uschar *, const char *, mode_t);
358 extern int open_cutthrough_connection( address_item * addr );
360 extern uschar *parse_extract_address(uschar *, uschar **, int *, int *, int *,
362 extern int parse_forward_list(uschar *, int, address_item **, uschar **,
363 const uschar *, uschar *, error_block **);
364 extern uschar *parse_find_address_end(uschar *, BOOL);
365 extern uschar *parse_find_at(uschar *);
366 extern const uschar *parse_fix_phrase(const uschar *, int, uschar *, int);
367 extern uschar *parse_message_id(uschar *, uschar **, uschar **);
368 extern const uschar *parse_quote_2047(const uschar *, int, uschar *, uschar *, int, BOOL);
369 extern uschar *parse_date_time(uschar *str, time_t *t);
370 extern int vaguely_random_number(int);
372 extern int vaguely_random_number_fallback(int);
375 extern BOOL queue_action(uschar *, int, uschar **, int, int);
376 extern void queue_check_only(void);
377 extern unsigned queue_count(void);
378 extern unsigned queue_count_cached(void);
379 extern void queue_list(int, uschar **, int);
380 #ifdef EXPERIMENTAL_QUEUE_RAMP
381 extern void queue_notify_daemon(const uschar * hostname);
383 extern void queue_run(uschar *, uschar *, BOOL);
385 extern int random_number(int);
386 extern const uschar *rc_to_string(int);
387 extern int rda_interpret(redirect_block *, int, uschar *, uschar *,
388 uschar *, uschar *, uschar *, ugid_block *, address_item **,
389 uschar **, error_block **, int *, uschar *);
390 extern int rda_is_filter(const uschar *);
391 extern BOOL readconf_depends(driver_instance *, uschar *);
392 extern void readconf_driver_init(uschar *, driver_instance **,
393 driver_info *, int, void *, int, optionlist *, int);
394 extern uschar *readconf_find_option(void *);
395 extern void readconf_main(BOOL);
396 extern void readconf_options_from_list(optionlist *, unsigned, const uschar *, uschar *);
397 extern BOOL readconf_print(uschar *, uschar *, BOOL);
398 extern uschar *readconf_printtime(int);
399 extern uschar *readconf_readname(uschar *, int, uschar *);
400 extern int readconf_readtime(const uschar *, int, BOOL);
401 extern void readconf_rest(void);
402 extern uschar *readconf_retry_error(const uschar *, const uschar *, int *, int *);
403 extern void readconf_save_config(const uschar *);
404 extern void read_message_body(BOOL);
405 extern void receive_bomb_out(uschar *, uschar *) NORETURN;
406 extern BOOL receive_check_fs(int);
407 extern BOOL receive_check_set_sender(uschar *);
408 extern BOOL receive_msg(BOOL);
409 extern int_eximarith_t receive_statvfs(BOOL, int *);
410 extern void receive_swallow_smtp(void);
411 #ifdef WITH_CONTENT_SCAN
412 extern int regex(const uschar **);
414 extern BOOL regex_match_and_setup(const pcre *, const uschar *, int, int);
415 extern const pcre *regex_must_compile(const uschar *, BOOL, BOOL);
416 extern void retry_add_item(address_item *, uschar *, int);
417 extern BOOL retry_check_address(const uschar *, host_item *, uschar *, BOOL,
418 uschar **, uschar **);
419 extern retry_config *retry_find_config(const uschar *, const uschar *, int, int);
420 extern BOOL retry_ultimate_address_timeout(uschar *, const uschar *,
421 dbdata_retry *, time_t);
422 extern void retry_update(address_item **, address_item **, address_item **);
423 extern uschar *rewrite_address(uschar *, BOOL, BOOL, rewrite_rule *, int);
424 extern uschar *rewrite_address_qualify(uschar *, BOOL);
425 extern header_line *rewrite_header(header_line *,
426 const uschar *, const uschar *,
427 rewrite_rule *, int, BOOL);
428 extern uschar *rewrite_one(uschar *, int, BOOL *, BOOL, uschar *,
430 extern void rewrite_test(uschar *);
431 extern uschar *rfc2047_decode2(uschar *, BOOL, uschar *, int, int *, int *,
433 extern int route_address(address_item *, address_item **, address_item **,
434 address_item **, address_item **, int);
435 extern int route_check_prefix(const uschar *, const uschar *, unsigned *);
436 extern int route_check_suffix(const uschar *, const uschar *, unsigned *);
437 extern BOOL route_findgroup(uschar *, gid_t *);
438 extern BOOL route_finduser(const uschar *, struct passwd **, uid_t *);
439 extern BOOL route_find_expanded_group(uschar *, uschar *, uschar *, gid_t *,
441 extern BOOL route_find_expanded_user(uschar *, uschar *, uschar *,
442 struct passwd **, uid_t *, uschar **);
443 extern void route_init(void);
444 extern gstring * route_show_supported(gstring *);
445 extern void route_tidyup(void);
447 extern uschar *search_find(void *, const uschar *, uschar *, int,
448 const uschar *, int, int, int *, const uschar *);
449 extern int search_findtype(const uschar *, int);
450 extern int search_findtype_partial(const uschar *, int *, const uschar **, int *,
451 int *, const uschar **);
452 extern void *search_open(const uschar *, int, int, uid_t *, gid_t *);
453 extern void search_tidyup(void);
454 extern void set_process_info(const char *, ...) PRINTF_FUNCTION(1,2);
455 extern void sha1_end(hctx *, const uschar *, int, uschar *);
456 extern void sha1_mid(hctx *, const uschar *);
457 extern void sha1_start(hctx *);
458 extern int sieve_interpret(uschar *, int, uschar *, uschar *, uschar *,
459 uschar *, address_item **, uschar **);
460 extern void sigalrm_handler(int);
461 extern BOOL smtp_buffered(void);
462 extern void smtp_closedown(uschar *);
463 extern void smtp_command_timeout_exit(void) NORETURN;
464 extern void smtp_command_sigterm_exit(void) NORETURN;
465 extern void smtp_data_timeout_exit(void) NORETURN;
466 extern void smtp_data_sigint_exit(void) NORETURN;
467 extern void smtp_deliver_init(void);
468 extern uschar *smtp_cmd_hist(void);
469 extern int smtp_connect(smtp_connect_args *, const blob *);
470 extern int smtp_sock_connect(host_item *, int, int, uschar *,
471 transport_instance * tb, int, const blob *);
472 extern int smtp_feof(void);
473 extern int smtp_ferror(void);
474 extern uschar *smtp_get_connection_info(void);
475 extern BOOL smtp_get_interface(uschar *, int, address_item *,
476 uschar **, uschar *);
477 extern BOOL smtp_get_port(uschar *, address_item *, int *, uschar *);
478 extern int smtp_getc(unsigned);
479 extern uschar *smtp_getbuf(unsigned *);
480 extern void smtp_get_cache(void);
481 extern int smtp_handle_acl_fail(int, int, uschar *, uschar *);
482 extern void smtp_log_no_mail(void);
483 extern void smtp_message_code(uschar **, int *, uschar **, uschar **, BOOL);
484 extern void smtp_proxy_tls(void *, uschar *, size_t, int *, int) NORETURN;
485 extern BOOL smtp_read_response(void *, uschar *, int, int, int);
486 extern void *smtp_reset(void *);
487 extern void smtp_respond(uschar *, int, BOOL, uschar *);
488 extern void smtp_notquit_exit(uschar *, uschar *, uschar *, ...);
489 extern void smtp_port_for_connect(host_item *, int);
490 extern void smtp_send_prohibition_message(int, uschar *);
491 extern int smtp_setup_msg(void);
492 extern BOOL smtp_start_session(void);
493 extern int smtp_ungetc(int);
494 extern BOOL smtp_verify_helo(void);
495 extern int smtp_write_command(void *, int, const char *, ...) PRINTF_FUNCTION(3,4);
496 #ifdef WITH_CONTENT_SCAN
497 extern int spam(const uschar **);
498 extern FILE *spool_mbox(unsigned long *, const uschar *, uschar **);
500 extern void spool_clear_header_globals(void);
501 extern BOOL spool_move_message(uschar *, uschar *, uschar *, uschar *);
502 extern int spool_open_datafile(uschar *);
503 extern int spool_open_temp(uschar *);
504 extern int spool_read_header(uschar *, BOOL, BOOL);
505 extern int spool_write_header(uschar *, int, uschar **);
506 extern int stdin_getc(unsigned);
507 extern int stdin_feof(void);
508 extern int stdin_ferror(void);
509 extern int stdin_ungetc(int);
511 extern void store_exit(void);
512 extern gstring *string_append(gstring *, int, ...) WARN_UNUSED_RESULT;
513 extern gstring *string_append_listele(gstring *, uschar, const uschar *) WARN_UNUSED_RESULT;
514 extern gstring *string_append_listele_n(gstring *, uschar, const uschar *, unsigned) WARN_UNUSED_RESULT;
515 extern gstring *string_append2_listele_n(gstring *, const uschar *, const uschar *, unsigned) WARN_UNUSED_RESULT;
516 extern uschar *string_base62(unsigned long int);
517 extern gstring *string_cat (gstring *, const uschar * ) WARN_UNUSED_RESULT;
518 extern gstring *string_catn(gstring *, const uschar *, int) WARN_UNUSED_RESULT;
519 extern int string_compare_by_pointer(const void *, const void *);
520 extern uschar *string_copy_dnsdomain(uschar *);
521 extern uschar *string_copy_malloc(const uschar *);
522 extern uschar *string_dequote(const uschar **);
523 extern uschar *string_format_size(int, uschar *);
524 extern int string_interpret_escape(const uschar **);
525 extern int string_is_ip_address(const uschar *, int *);
527 extern BOOL string_is_utf8(const uschar *);
529 extern const uschar *string_printing2(const uschar *, BOOL);
530 extern uschar *string_split_message(uschar *);
531 extern uschar *string_unprinting(uschar *);
533 extern uschar *string_address_utf8_to_alabel(const uschar *, uschar **);
534 extern uschar *string_domain_alabel_to_utf8(const uschar *, uschar **);
535 extern uschar *string_domain_utf8_to_alabel(const uschar *, uschar **);
536 extern uschar *string_localpart_alabel_to_utf8(const uschar *, uschar **);
537 extern uschar *string_localpart_utf8_to_alabel(const uschar *, uschar **);
540 #define string_format(buf, siz, fmt, ...) \
541 string_format_trc(buf, siz, US __FUNCTION__, __LINE__, fmt, __VA_ARGS__)
542 extern BOOL string_format_trc(uschar *, int, const uschar *, unsigned,
543 const char *, ...) ALMOST_PRINTF(5,6);
545 #define string_vformat(g, flgs, fmt, ap) \
546 string_vformat_trc(g, US __FUNCTION__, __LINE__, \
547 STRING_SPRINTF_BUFFER_SIZE, flgs, fmt, ap)
548 extern gstring *string_vformat_trc(gstring *, const uschar *, unsigned,
549 unsigned, unsigned, const char *, va_list);
551 #define string_open_failed(eno, fmt, ...) \
552 string_open_failed_trc(eno, US __FUNCTION__, __LINE__, fmt, __VA_ARGS__)
553 extern uschar *string_open_failed_trc(int, const uschar *, unsigned,
554 const char *, ...) PRINTF_FUNCTION(4,5);
556 #define string_nextinlist(lp, sp, b, l) \
557 string_nextinlist_trc((lp), (sp), (b), (l), US __FUNCTION__, __LINE__)
558 extern uschar *string_nextinlist_trc(const uschar **listptr, int *separator, uschar *buffer, int buflen,
559 const uschar * func, int line);
561 extern int strcmpic(const uschar *, const uschar *);
562 extern int strncmpic(const uschar *, const uschar *, int);
563 extern uschar *strstric(uschar *, uschar *, BOOL);
565 extern int test_harness_fudged_queue_time(int);
566 extern void tcp_init(void);
567 #ifdef EXIM_TFO_PROBE
568 extern void tfo_probe(void);
570 extern void tls_modify_variables(tls_support *);
571 extern uschar *tod_stamp(int);
573 extern BOOL transport_check_waiting(const uschar *, const uschar *, int, uschar *,
574 BOOL *, oicf, void*);
575 extern void transport_init(void);
576 extern void transport_do_pass_socket(const uschar *, const uschar *,
577 const uschar *, uschar *, int);
578 extern BOOL transport_pass_socket(const uschar *, const uschar *, const uschar *, uschar *,
580 extern uschar *transport_rcpt_address(address_item *, BOOL);
581 extern BOOL transport_set_up_command(const uschar ***, uschar *,
582 BOOL, int, address_item *, uschar *, uschar **);
583 extern void transport_update_waiting(host_item *, uschar *);
584 extern BOOL transport_write_block(transport_ctx *, uschar *, int, BOOL);
585 extern void transport_write_reset(int);
586 extern BOOL transport_write_string(int, const char *, ...);
587 extern BOOL transport_headers_send(transport_ctx *,
588 BOOL (*)(transport_ctx *, uschar *, int));
589 extern gstring * transport_show_supported(gstring *);
590 extern BOOL transport_write_message(transport_ctx *, int);
591 extern void tree_add_duplicate(uschar *, address_item *);
592 extern void tree_add_nonrecipient(uschar *);
593 extern void tree_add_unusable(host_item *);
594 extern void tree_dup(tree_node **, tree_node *);
595 extern int tree_insertnode(tree_node **, tree_node *);
596 extern tree_node *tree_search(tree_node *, const uschar *);
597 extern void tree_write(tree_node *, FILE *);
598 extern void tree_walk(tree_node *, void (*)(uschar*, uschar*, void*), void *);
600 #ifdef WITH_CONTENT_SCAN
601 extern void unspool_mbox(void);
604 extern void utf8_version_report(FILE *);
607 extern int verify_address(address_item *, FILE *, int, int, int, int,
608 uschar *, uschar *, BOOL *);
609 extern int verify_check_dnsbl(int, const uschar **, uschar **);
610 extern int verify_check_header_address(uschar **, uschar **, int, int, int,
611 uschar *, uschar *, int, int *);
612 extern int verify_check_headers(uschar **);
613 extern int verify_check_header_names_ascii(uschar **);
614 extern int verify_check_host(uschar **);
615 extern int verify_check_notblind(BOOL);
616 extern int verify_check_given_host(const uschar **, const host_item *);
617 extern int verify_check_this_host(const uschar **, unsigned int *,
618 const uschar*, const uschar *, const uschar **);
619 extern address_item *verify_checked_sender(uschar *);
620 extern void verify_get_ident(int);
621 extern BOOL verify_sender(int *, uschar **);
622 extern BOOL verify_sender_preliminary(int *, uschar **);
623 extern void version_init(void);
625 extern BOOL write_chunk(transport_ctx *, uschar *, int);
626 extern ssize_t write_to_fd_buf(int, const uschar *, size_t);
629 /******************************************************************************/
630 /* Predicate: if an address is in a tainted pool.
631 By extension, a variable pointing to this address is tainted.
635 is_tainted(const void * p)
637 #if defined(COMPILE_UTILITY) || defined(MACRO_PREDEF) || defined(EM_VERSION_C)
641 extern BOOL is_tainted_fn(const void *);
642 return is_tainted_fn(p);
646 /******************************************************************************/
647 /* String functions */
648 static inline uschar * __Ustrcat(uschar * dst, const uschar * src, const char * func, int line)
650 #if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
651 if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrcat", CUS func, line);
653 return US strcat(CS dst, CCS src);
655 static inline uschar * __Ustrcpy(uschar * dst, const uschar * src, const char * func, int line)
657 #if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
658 if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrcpy", CUS func, line);
660 return US strcpy(CS dst, CCS src);
662 static inline uschar * __Ustrncat(uschar * dst, const uschar * src, size_t n, const char * func, int line)
664 #if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
665 if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrncat", CUS func, line);
667 return US strncat(CS dst, CCS src, n);
669 static inline uschar * __Ustrncpy(uschar * dst, const uschar * src, size_t n, const char * func, int line)
671 #if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
672 if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrncpy", CUS func, line);
674 return US strncpy(CS dst, CCS src, n);
676 /*XXX will likely need unchecked copy also */
679 /* Advance the string pointer given over any whitespace.
680 Return the next char as there's enought places using it to be useful. */
682 #define Uskip_whitespace(sp) skip_whitespace(CUSS sp)
684 static inline uschar skip_whitespace(const uschar ** sp)
685 { while (isspace(**sp)) (*sp)++; return **sp; }
688 /******************************************************************************/
690 #if !defined(MACRO_PREDEF) && !defined(COMPILE_UTILITY)
691 /* exim_chown - in some NFSv4 setups *seemes* to be an issue with
692 chown(<exim-uid>, <exim-gid>).
694 Probably because the idmapping is broken, misconfigured or set up in
695 an unusal way. (see Bug 2931). As I'm not sure, if this was a single
696 case of misconfiguration, or if there are more such broken systems
697 out, I try to impose as least impact as possible and for now just write
698 a panic log entry pointing to the bug report. You're encouraged to
699 contact the developers, if you experience this issue.
701 fd the file descriptor (or -1 if not valid)
702 name the file name for error messages or for file operations,
707 returns 0 on success, -1 on failure */
710 exim_fchown(int fd, uid_t owner, gid_t group, const uschar *name)
712 return fchown(fd, owner, group)
713 ? exim_chown_failure(fd, name, owner, group) : 0;
717 exim_chown(const uschar *name, uid_t owner, gid_t group)
719 return chown(CCS name, owner, group)
720 ? exim_chown_failure(-1, name, owner, group) : 0;
722 #endif /* !MACRO_PREDEF && !COMPILE_UTILITY */
724 /******************************************************************************/
725 /* String functions */
727 #if !defined(MACRO_PREDEF)
728 /*************************************************
729 * Copy and save string *
730 *************************************************/
732 /* This function assumes that memcpy() is faster than strcpy().
733 The result is explicitly nul-terminated.
736 static inline uschar *
737 string_copyn_taint_trc(const uschar * s, unsigned len,
738 BOOL tainted, const char * func, int line)
740 uschar * ss = store_get_3(len + 1, tainted, func, line);
746 static inline uschar *
747 string_copy_taint_trc(const uschar * s, BOOL tainted, const char * func, int line)
748 { return string_copyn_taint_trc(s, Ustrlen(s), tainted, func, line); }
750 static inline uschar *
751 string_copyn_trc(const uschar * s, unsigned len, const char * func, int line)
752 { return string_copyn_taint_trc(s, len, is_tainted(s), func, line); }
753 static inline uschar *
754 string_copy_trc(const uschar * s, const char * func, int line)
755 { return string_copy_taint_trc(s, is_tainted(s), func, line); }
758 /* String-copy functions explicitly setting the taint status */
760 #define string_copyn_taint(s, len, tainted) \
761 string_copyn_taint_trc((s), (len), (tainted), __FUNCTION__, __LINE__)
762 #define string_copy_taint(s, tainted) \
763 string_copy_taint_trc((s), (tainted), __FUNCTION__, __LINE__)
765 /* Simple string-copy functions maintaining the taint */
767 #define string_copyn(s, len) \
768 string_copyn_taint_trc((s), (len), is_tainted(s), __FUNCTION__, __LINE__)
769 #define string_copy(s) \
770 string_copy_taint_trc((s), is_tainted(s), __FUNCTION__, __LINE__)
773 /*************************************************
774 * Copy, lowercase and save string *
775 *************************************************/
778 Argument: string to copy
779 Returns: copy of string in new store, with letters lowercased
782 static inline uschar *
783 string_copylc(const uschar *s)
785 uschar *ss = store_get(Ustrlen(s) + 1, is_tainted(s));
787 while (*s != 0) *p++ = tolower(*s++);
794 /*************************************************
795 * Copy, lowercase, and save string, given length *
796 *************************************************/
798 /* It is assumed the data contains no zeros. A zero is added
803 n number of characters
805 Returns: copy of string in new store, with letters lowercased
808 static inline uschar *
809 string_copynlc(uschar *s, int n)
811 uschar *ss = store_get(n + 1, is_tainted(s));
813 while (n-- > 0) *p++ = tolower(*s++);
819 # ifndef COMPILE_UTILITY
820 /*************************************************
821 * Copy and save string in longterm store *
822 *************************************************/
824 /* This function assumes that memcpy() is faster than strcpy().
826 Argument: string to copy
827 Returns: copy of string in new store
830 static inline uschar *
831 string_copy_perm(const uschar *s, BOOL force_taint)
833 int old_pool = store_pool;
834 int len = Ustrlen(s) + 1;
837 store_pool = POOL_PERM;
838 ss = store_get(len, force_taint || is_tainted(s));
840 store_pool = old_pool;
847 /* sprintf into a buffer, taint-unchecked */
850 string_format_nt(uschar * buf, int siz, const char * fmt, ...)
852 gstring gs = { .size = siz, .ptr = 0, .s = buf };
855 (void) string_vformat(&gs, SVFMT_TAINT_NOCHK, fmt, ap);
861 /******************************************************************************/
862 /* Growable-string functions */
864 /* Create a growable-string with some preassigned space */
866 #define string_get_tainted(size, tainted) \
867 string_get_tainted_trc((size), (tainted), __FUNCTION__, __LINE__)
869 static inline gstring *
870 string_get_tainted_trc(unsigned size, BOOL tainted, const char * func, unsigned line)
872 gstring * g = store_get_3(sizeof(gstring) + size, tainted, func, line);
879 #define string_get(size) \
880 string_get_trc((size), __FUNCTION__, __LINE__)
882 static inline gstring *
883 string_get_trc(unsigned size, const char * func, unsigned line)
885 return string_get_tainted_trc(size, FALSE, func, line);
888 /* NUL-terminate the C string in the growable-string, and return it. */
890 static inline uschar *
891 string_from_gstring(gstring * g)
898 static inline unsigned
899 gstring_length(const gstring * g)
901 return g ? (unsigned)g->ptr : 0;
905 #define gstring_release_unused(g) \
906 gstring_release_unused_trc(g, __FUNCTION__, __LINE__)
909 gstring_release_unused_trc(gstring * g, const char * file, unsigned line)
911 if (g) store_release_above_3(g->s + (g->size = g->ptr + 1), file, line);
915 /* sprintf-append to a growable-string */
917 #define string_fmt_append(g, fmt, ...) \
918 string_fmt_append_f_trc(g, US __FUNCTION__, __LINE__, \
919 SVFMT_EXTEND|SVFMT_REBUFFER, fmt, __VA_ARGS__)
921 #define string_fmt_append_f(g, flgs, fmt, ...) \
922 string_fmt_append_f_trc(g, US __FUNCTION__, __LINE__, \
923 flgs, fmt, __VA_ARGS__)
925 static inline gstring *
926 string_fmt_append_f_trc(gstring * g, const uschar * func, unsigned line,
927 unsigned flags, const char *format, ...)
930 va_start(ap, format);
931 g = string_vformat_trc(g, func, line, STRING_SPRINTF_BUFFER_SIZE,
938 /* Copy the content of a string to tainted memory */
941 gstring_rebuffer(gstring * g)
943 uschar * s = store_get(g->size, TRUE);
944 memcpy(s, g->s, g->ptr);
949 /******************************************************************************/
951 #define store_get_dns_answer() store_get_dns_answer_trc(CUS __FUNCTION__, __LINE__)
953 static inline dns_answer *
954 store_get_dns_answer_trc(const uschar * func, unsigned line)
956 return store_get_3(sizeof(dns_answer), TRUE, CCS func, line); /* use tainted mem */
959 /******************************************************************************/
960 /* Routines with knowledge of spool layout */
962 # ifndef COMPILE_UTILITY
964 spool_pname_buf(uschar * buf, int len)
966 snprintf(CS buf, len, "%s/%s/input", spool_directory, queue_name);
969 static inline uschar *
970 spool_dname(const uschar * purpose, uschar * subdir)
972 return string_sprintf("%s/%s/%s/%s",
973 spool_directory, queue_name, purpose, subdir);
977 static inline uschar *
978 spool_q_sname(const uschar * purpose, const uschar * q, uschar * subdir)
980 return string_sprintf("%s%s%s%s%s",
983 *subdir ? "/" : "", subdir);
986 static inline uschar *
987 spool_sname(const uschar * purpose, uschar * subdir)
989 return spool_q_sname(purpose, queue_name, subdir);
992 static inline uschar *
993 spool_q_fname(const uschar * purpose, const uschar * q,
994 const uschar * subdir, const uschar * fname, const uschar * suffix)
996 return string_sprintf("%s/%s/%s/%s/%s%s",
997 spool_directory, q, purpose, subdir, fname, suffix);
1000 static inline uschar *
1001 spool_fname(const uschar * purpose, const uschar * subdir, const uschar * fname,
1002 const uschar * suffix)
1004 #ifdef COMPILE_UTILITY /* version avoiding string-extension */
1005 int len = Ustrlen(spool_directory) + 1 + Ustrlen(queue_name) + 1 + Ustrlen(purpose) + 1
1006 + Ustrlen(subdir) + 1 + Ustrlen(fname) + Ustrlen(suffix) + 1;
1007 uschar * buf = store_get(len, FALSE);
1008 string_format(buf, len, "%s/%s/%s/%s/%s%s",
1009 spool_directory, queue_name, purpose, subdir, fname, suffix);
1012 return spool_q_fname(purpose, queue_name, subdir, fname, suffix);
1017 set_subdir_str(uschar * subdir_str, const uschar * name,
1018 int search_sequence)
1020 subdir_str[0] = split_spool_directory == (search_sequence == 0)
1022 subdir_str[1] = '\0';
1025 /******************************************************************************/
1026 /* Time calculations */
1029 timesince(struct timeval * diff, const struct timeval * then)
1031 gettimeofday(diff, NULL);
1032 diff->tv_sec -= then->tv_sec;
1033 if ((diff->tv_usec -= then->tv_usec) < 0)
1036 diff->tv_usec += 1000*1000;
1040 static inline uschar *
1041 string_timediff(const struct timeval * diff)
1043 static uschar buf[sizeof("0.000s")];
1045 if (diff->tv_sec >= 5 || !LOGGING(millisec))
1046 return readconf_printtime((int)diff->tv_sec);
1048 snprintf(CS buf, sizeof(buf), "%u.%03us", (uint)diff->tv_sec, (uint)diff->tv_usec/1000);
1053 static inline uschar *
1054 string_timesince(const struct timeval * then)
1056 struct timeval diff;
1057 timesince(&diff, then);
1058 return string_timediff(&diff);
1062 report_time_since(const struct timeval * t0, const uschar * where)
1064 # ifdef MEASURE_TIMING
1065 struct timeval diff;
1066 timesince(&diff, t0);
1067 fprintf(stderr, "%d %s:\t%ld.%06ld\n",
1068 (uint)getpid(), where, (long)diff.tv_sec, (long)diff.tv_usec);
1074 testharness_pause_ms(int millisec)
1076 #ifndef MEASURE_TIMING
1077 if (f.running_in_test_harness && f.testsuite_delays) millisleep(millisec);
1081 /******************************************************************************/
1082 /* Taint-checked file opens */
1085 exim_open2(const char *pathname, int flags)
1087 if (!is_tainted(pathname)) return open(pathname, flags);
1088 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1093 exim_open(const char *pathname, int flags, mode_t mode)
1095 if (!is_tainted(pathname)) return open(pathname, flags, mode);
1096 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1101 exim_openat(int dirfd, const char *pathname, int flags)
1103 if (!is_tainted(pathname)) return openat(dirfd, pathname, flags);
1104 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1109 exim_openat4(int dirfd, const char *pathname, int flags, mode_t mode)
1111 if (!is_tainted(pathname)) return openat(dirfd, pathname, flags, mode);
1112 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1117 static inline FILE *
1118 exim_fopen(const char *pathname, const char *mode)
1120 if (!is_tainted(pathname)) return fopen(pathname, mode);
1121 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1127 exim_opendir(const uschar * name)
1129 if (!is_tainted(name)) return opendir(CCS name);
1130 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted dirname '%s'", name);
1135 /******************************************************************************/
1136 # if !defined(COMPILE_UTILITY)
1137 /* Process manipulation */
1140 exim_fork(const unsigned char * purpose)
1143 DEBUG(D_any) debug_printf("%s forking for %s\n", process_purpose, purpose);
1144 if ((pid = fork()) == 0)
1146 process_purpose = purpose;
1147 DEBUG(D_any) debug_printf("postfork: %s\n", purpose);
1151 testharness_pause_ms(100); /* let child work */
1152 DEBUG(D_any) debug_printf("%s forked for %s: %d\n", process_purpose, purpose, (int)pid);
1159 child_open_exim(int * fdptr, const uschar * purpose)
1160 { return child_open_exim_function(fdptr, purpose); }
1163 child_open_exim2(int * fdptr, uschar * sender,
1164 uschar * sender_auth, const uschar * purpose)
1165 { return child_open_exim2_function(fdptr, sender, sender_auth, purpose); }
1168 child_open(uschar **argv, uschar **envp, int newumask, int *infdptr,
1169 int *outfdptr, BOOL make_leader, const uschar * purpose)
1170 { return child_open_function(argv, envp, newumask, infdptr,
1171 outfdptr, make_leader, purpose);
1174 # endif /* !COMPILE_UTILITY */
1176 /******************************************************************************/
1177 #endif /* !MACRO_PREDEF */
1179 #endif /* _FUNCTIONS_H_ */
1183 /* End of functions.h */