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 debug_print_socket(int);
189 extern void decode_bits(unsigned int *, size_t, int *,
190 uschar *, bit_table *, int, uschar *, int);
191 extern void delete_pid_file(void);
192 extern void deliver_local(address_item *, BOOL);
193 extern address_item *deliver_make_addr(uschar *, BOOL);
194 extern void delivery_log(int, address_item *, int, uschar *);
195 extern int deliver_message(uschar *, BOOL, BOOL);
196 extern void deliver_msglog(const char *, ...) PRINTF_FUNCTION(1,2);
197 extern void deliver_set_expansions(address_item *);
198 extern int deliver_split_address(address_item *);
199 extern void deliver_succeeded(address_item *);
201 extern uschar *deliver_get_sender_address (uschar *id);
202 extern void delivery_re_exec(int);
204 extern void die_tainted(const uschar *, const uschar *, int);
205 extern BOOL directory_make(const uschar *, const uschar *, int, BOOL);
207 extern uschar *dkim_exim_query_dns_txt(const uschar *);
208 extern void dkim_exim_sign_init(void);
210 extern BOOL dkim_transport_write_message(transport_ctx *,
211 struct ob_dkim *, const uschar ** errstr);
213 extern dns_address *dns_address_from_rr(dns_answer *, dns_record *);
214 extern int dns_basic_lookup(dns_answer *, const uschar *, int);
215 extern uschar *dns_build_reverse(const uschar *);
216 extern time_t dns_expire_from_soa(dns_answer *, int);
217 extern void dns_init(BOOL, BOOL, BOOL);
218 extern BOOL dns_is_aa(const dns_answer *);
219 extern BOOL dns_is_secure(const dns_answer *);
220 extern int dns_lookup(dns_answer *, const uschar *, int, const uschar **);
221 extern void dns_pattern_init(void);
222 extern int dns_special_lookup(dns_answer *, const uschar *, int, const uschar **);
223 extern dns_record *dns_next_rr(const dns_answer *, dns_scan *, int);
224 extern uschar *dns_text_type(int);
225 extern void dscp_list_to_stream(FILE *);
226 extern BOOL dscp_lookup(const uschar *, int, int *, int *, int *);
228 extern void enq_end(uschar *);
229 extern BOOL enq_start(uschar *, unsigned);
230 #ifndef DISABLE_EVENT
231 extern uschar *event_raise(uschar *, const uschar *, uschar *);
232 extern void msg_event_raise(const uschar *, const address_item *);
235 extern int exim_chown_failure(int, const uschar*, uid_t, gid_t);
236 extern const uschar * exim_errstr(int);
237 extern void exim_exit(int) NORETURN;
238 extern void exim_gettime(struct timeval *);
239 extern void exim_nullstd(void);
240 extern void exim_setugid(uid_t, gid_t, BOOL, uschar *);
241 extern void exim_underbar_exit(int) NORETURN;
242 extern void exim_wait_tick(struct timeval *, int);
243 extern int exp_bool(address_item *addr,
244 uschar *mtype, uschar *mname, unsigned dgb_opt, uschar *oname, BOOL bvalue,
245 uschar *svalue, BOOL *rvalue);
246 extern BOOL expand_check_condition(uschar *, uschar *, uschar *);
247 extern uschar *expand_file_big_buffer(const uschar *);
248 extern uschar *expand_string(uschar *); /* public, cannot make const */
249 extern const uschar *expand_cstring(const uschar *); /* ... so use this one */
250 extern uschar *expand_getkeyed(const uschar *, const uschar *);
252 extern uschar *expand_hide_passwords(uschar * );
253 extern uschar *expand_string_copy(const uschar *);
254 extern int_eximarith_t expand_string_integer(uschar *, BOOL);
255 extern void modify_variable(uschar *, void *);
257 extern BOOL fd_ready(int, time_t);
259 extern int filter_interpret(uschar *, int, address_item **, uschar **);
260 extern BOOL filter_personal(string_item *, BOOL);
261 extern BOOL filter_runtest(int, uschar *, BOOL, BOOL);
262 extern BOOL filter_system_interpret(address_item **, uschar **);
264 extern uschar * fn_hdrs_added(void);
265 extern void force_fd(int, int);
267 extern void header_add(int, const char *, ...);
268 extern header_line *header_add_at_position_internal(BOOL, uschar *, BOOL, int, const char *, ...);
269 extern int header_checkname(header_line *, BOOL);
270 extern BOOL header_match(uschar *, BOOL, BOOL, string_item *, int, ...);
271 extern int host_address_extract_port(uschar *);
272 extern uschar *host_and_ident(BOOL);
273 extern int host_aton(const uschar *, int *);
274 extern void host_build_hostlist(host_item **, const uschar *, BOOL);
275 extern ip_address_item *host_build_ifacelist(const uschar *, uschar *);
276 extern void host_build_log_info(void);
277 extern void host_build_sender_fullhost(void);
278 extern int host_find_byname(host_item *, const uschar *, int,
279 const uschar **, BOOL);
280 extern int host_find_bydns(host_item *, const uschar *, int, uschar *, uschar *,
281 uschar *, const dnssec_domains *, const uschar **, BOOL *);
282 extern ip_address_item *host_find_interfaces(void);
283 extern BOOL host_is_in_net(const uschar *, const uschar *, int);
284 extern BOOL host_is_tls_on_connect_port(int);
285 extern int host_item_get_port(host_item *);
286 extern void host_mask(int, int *, int);
287 extern int host_name_lookup(void);
288 extern int host_nmtoa(int, int *, int, uschar *, int);
289 extern uschar *host_ntoa(int, const void *, uschar *, int *);
290 extern int host_scan_for_local_hosts(host_item *, host_item **, BOOL *);
292 extern uschar *imap_utf7_encode(uschar *, const uschar *,
293 uschar, uschar *, uschar **);
295 extern void invert_address(uschar *, uschar *);
296 extern int ip_addr(void *, int, const uschar *, int);
297 extern int ip_bind(int, int, uschar *, int);
298 extern int ip_connect(int, int, const uschar *, int, int, const blob *);
299 extern int ip_connectedsocket(int, const uschar *, int, int,
300 int, host_item *, uschar **, const blob *);
301 extern int ip_get_address_family(int);
302 extern void ip_keepalive(int, const uschar *, BOOL);
303 extern int ip_recv(client_conn_ctx *, uschar *, int, time_t);
304 extern int ip_socket(int, int);
306 extern int ip_tcpsocket(const uschar *, uschar **, int, host_item *);
307 extern int ip_unixsocket(const uschar *, uschar **);
308 extern int ip_streamsocket(const uschar *, uschar **, int, host_item *);
310 extern int ipv6_nmtoa(int *, uschar *);
312 extern uschar *local_part_quote(uschar *);
313 extern int log_create(uschar *);
314 extern int log_create_as_exim(uschar *);
315 extern void log_close_all(void);
317 extern macro_item * macro_create(const uschar *, const uschar *, BOOL);
318 extern BOOL macro_read_assignment(uschar *);
319 extern uschar *macros_expand(int, int *, BOOL *);
320 extern void mainlog_close(void);
321 #ifdef WITH_CONTENT_SCAN
322 extern int malware(const uschar *, int);
323 extern int malware_in_file(uschar *);
324 extern void malware_init(void);
325 extern gstring * malware_show_supported(gstring *);
327 extern int match_address_list(const uschar *, BOOL, BOOL, const uschar **,
328 unsigned int *, int, int, const uschar **);
329 extern int match_address_list_basic(const uschar *, const uschar **, int);
330 extern int match_check_list(const uschar **, int, tree_node **, unsigned int **,
331 int(*)(void *, const uschar *, const uschar **, uschar **), void *, int,
332 const uschar *, const uschar **);
333 extern int match_isinlist(const uschar *, const uschar **, int, tree_node **,
334 unsigned int *, int, BOOL, const uschar **);
335 extern int match_check_string(const uschar *, const uschar *, int, BOOL, BOOL, BOOL,
337 extern void md5_end(md5 *, const uschar *, int, uschar *);
338 extern void md5_mid(md5 *, const uschar *);
339 extern void md5_start(md5 *);
340 extern void millisleep(int);
341 #ifdef WITH_CONTENT_SCAN
342 struct mime_boundary_context;
343 extern int mime_acl_check(uschar *acl, FILE *f,
344 struct mime_boundary_context *, uschar **, uschar **);
345 extern int mime_decode(const uschar **);
346 extern ssize_t mime_decode_base64(FILE *, FILE *, uschar *);
347 extern int mime_regex(const uschar **);
348 extern void mime_set_anomaly(int);
350 extern uschar *moan_check_errorcopy(uschar *);
351 extern BOOL moan_skipped_syntax_errors(uschar *, error_block *, uschar *,
353 extern void moan_smtp_batch(uschar *, const char *, ...) PRINTF_FUNCTION(2,3);
354 extern BOOL moan_send_message(uschar *, int, error_block *eblock,
355 header_line *, FILE *, uschar *);
356 extern void moan_tell_someone(uschar *, address_item *,
357 const uschar *, const char *, ...) PRINTF_FUNCTION(4,5);
358 extern BOOL moan_to_sender(int, error_block *, header_line *, FILE *, BOOL);
359 extern void moan_write_from(FILE *);
360 extern void moan_write_references(FILE *, uschar *);
361 extern FILE *modefopen(const uschar *, const char *, mode_t);
363 extern int open_cutthrough_connection( address_item * addr );
365 extern uschar *parse_extract_address(uschar *, uschar **, int *, int *, int *,
367 extern int parse_forward_list(uschar *, int, address_item **, uschar **,
368 const uschar *, uschar *, error_block **);
369 extern uschar *parse_find_address_end(uschar *, BOOL);
370 extern uschar *parse_find_at(uschar *);
371 extern const uschar *parse_fix_phrase(const uschar *, int, uschar *, int);
372 extern uschar *parse_message_id(uschar *, uschar **, uschar **);
373 extern const uschar *parse_quote_2047(const uschar *, int, uschar *, uschar *, int, BOOL);
374 extern uschar *parse_date_time(uschar *str, time_t *t);
375 extern int vaguely_random_number(int);
377 extern int vaguely_random_number_fallback(int);
380 extern BOOL queue_action(uschar *, int, uschar **, int, int);
381 extern void queue_check_only(void);
382 extern unsigned queue_count(void);
383 extern unsigned queue_count_cached(void);
384 extern void queue_list(int, uschar **, int);
385 #ifndef DISABLE_QUEUE_RAMP
386 extern void queue_notify_daemon(const uschar * hostname);
388 extern void queue_run(uschar *, uschar *, BOOL);
390 extern int random_number(int);
391 extern const uschar *rc_to_string(int);
392 extern int rda_interpret(redirect_block *, int, uschar *, uschar *,
393 uschar *, uschar *, uschar *, ugid_block *, address_item **,
394 uschar **, error_block **, int *, uschar *);
395 extern int rda_is_filter(const uschar *);
396 extern BOOL readconf_depends(driver_instance *, uschar *);
397 extern void readconf_driver_init(uschar *, driver_instance **,
398 driver_info *, int, void *, int, optionlist *, int);
399 extern uschar *readconf_find_option(void *);
400 extern void readconf_main(BOOL);
401 extern void readconf_options_from_list(optionlist *, unsigned, const uschar *, uschar *);
402 extern BOOL readconf_print(uschar *, uschar *, BOOL);
403 extern uschar *readconf_printtime(int);
404 extern uschar *readconf_readname(uschar *, int, uschar *);
405 extern int readconf_readtime(const uschar *, int, BOOL);
406 extern void readconf_rest(void);
407 extern uschar *readconf_retry_error(const uschar *, const uschar *, int *, int *);
408 extern void readconf_save_config(const uschar *);
409 extern void read_message_body(BOOL);
410 extern void receive_bomb_out(uschar *, uschar *) NORETURN;
411 extern BOOL receive_check_fs(int);
412 extern BOOL receive_check_set_sender(uschar *);
413 extern BOOL receive_msg(BOOL);
414 extern int_eximarith_t receive_statvfs(BOOL, int *);
415 extern void receive_swallow_smtp(void);
416 #ifdef WITH_CONTENT_SCAN
417 extern int regex(const uschar **);
419 extern BOOL regex_match_and_setup(const pcre *, const uschar *, int, int);
420 extern const pcre *regex_must_compile(const uschar *, BOOL, BOOL);
421 extern void retry_add_item(address_item *, uschar *, int);
422 extern BOOL retry_check_address(const uschar *, host_item *, uschar *, BOOL,
423 uschar **, uschar **);
424 extern retry_config *retry_find_config(const uschar *, const uschar *, int, int);
425 extern BOOL retry_ultimate_address_timeout(uschar *, const uschar *,
426 dbdata_retry *, time_t);
427 extern void retry_update(address_item **, address_item **, address_item **);
428 extern uschar *rewrite_address(uschar *, BOOL, BOOL, rewrite_rule *, int);
429 extern uschar *rewrite_address_qualify(uschar *, BOOL);
430 extern header_line *rewrite_header(header_line *,
431 const uschar *, const uschar *,
432 rewrite_rule *, int, BOOL);
433 extern uschar *rewrite_one(uschar *, int, BOOL *, BOOL, uschar *,
435 extern void rewrite_test(uschar *);
436 extern uschar *rfc2047_decode2(uschar *, BOOL, uschar *, int, int *, int *,
438 extern int route_address(address_item *, address_item **, address_item **,
439 address_item **, address_item **, int);
440 extern int route_check_prefix(const uschar *, const uschar *, unsigned *);
441 extern int route_check_suffix(const uschar *, const uschar *, unsigned *);
442 extern BOOL route_findgroup(uschar *, gid_t *);
443 extern BOOL route_finduser(const uschar *, struct passwd **, uid_t *);
444 extern BOOL route_find_expanded_group(uschar *, uschar *, uschar *, gid_t *,
446 extern BOOL route_find_expanded_user(uschar *, uschar *, uschar *,
447 struct passwd **, uid_t *, uschar **);
448 extern void route_init(void);
449 extern gstring * route_show_supported(gstring *);
450 extern void route_tidyup(void);
452 extern uschar *search_args(int, uschar *, uschar *, uschar **, const uschar *);
453 extern uschar *search_find(void *, const uschar *, uschar *, int,
454 const uschar *, int, int, int *, const uschar *);
455 extern int search_findtype(const uschar *, int);
456 extern int search_findtype_partial(const uschar *, int *, const uschar **, int *,
457 int *, const uschar **);
458 extern void *search_open(const uschar *, int, int, uid_t *, gid_t *);
459 extern void search_tidyup(void);
460 extern void set_process_info(const char *, ...) PRINTF_FUNCTION(1,2);
461 extern void sha1_end(hctx *, const uschar *, int, uschar *);
462 extern void sha1_mid(hctx *, const uschar *);
463 extern void sha1_start(hctx *);
464 extern int sieve_interpret(uschar *, int, uschar *, uschar *, uschar *,
465 uschar *, address_item **, uschar **);
466 extern void sigalrm_handler(int);
467 extern BOOL smtp_buffered(void);
468 extern void smtp_closedown(uschar *);
469 extern void smtp_command_timeout_exit(void) NORETURN;
470 extern void smtp_command_sigterm_exit(void) NORETURN;
471 extern void smtp_data_timeout_exit(void) NORETURN;
472 extern void smtp_data_sigint_exit(void) NORETURN;
473 extern void smtp_deliver_init(void);
474 extern uschar *smtp_cmd_hist(void);
475 extern int smtp_connect(smtp_connect_args *, const blob *);
476 extern int smtp_sock_connect(host_item *, int, int, uschar *,
477 transport_instance * tb, int, const blob *);
478 extern int smtp_feof(void);
479 extern int smtp_ferror(void);
480 extern uschar *smtp_get_connection_info(void);
481 extern BOOL smtp_get_interface(uschar *, int, address_item *,
482 uschar **, uschar *);
483 extern BOOL smtp_get_port(uschar *, address_item *, int *, uschar *);
484 extern int smtp_getc(unsigned);
485 extern uschar *smtp_getbuf(unsigned *);
486 extern void smtp_get_cache(void);
487 extern int smtp_handle_acl_fail(int, int, uschar *, uschar *);
488 extern void smtp_log_no_mail(void);
489 extern void smtp_message_code(uschar **, int *, uschar **, uschar **, BOOL);
490 extern void smtp_proxy_tls(void *, uschar *, size_t, int *, int) NORETURN;
491 extern BOOL smtp_read_response(void *, uschar *, int, int, int);
492 extern void *smtp_reset(void *);
493 extern void smtp_respond(uschar *, int, BOOL, uschar *);
494 extern void smtp_notquit_exit(uschar *, uschar *, uschar *, ...);
495 extern void smtp_port_for_connect(host_item *, int);
496 extern void smtp_send_prohibition_message(int, uschar *);
497 extern int smtp_setup_msg(void);
498 extern BOOL smtp_start_session(void);
499 extern int smtp_ungetc(int);
500 extern BOOL smtp_verify_helo(void);
501 extern int smtp_write_command(void *, int, const char *, ...) PRINTF_FUNCTION(3,4);
502 #ifdef WITH_CONTENT_SCAN
503 extern int spam(const uschar **);
504 extern FILE *spool_mbox(unsigned long *, const uschar *, uschar **);
506 extern void spool_clear_header_globals(void);
507 extern BOOL spool_move_message(uschar *, uschar *, uschar *, uschar *);
508 extern int spool_open_datafile(uschar *);
509 extern int spool_open_temp(uschar *);
510 extern int spool_read_header(uschar *, BOOL, BOOL);
511 extern int spool_write_header(uschar *, int, uschar **);
512 extern int stdin_getc(unsigned);
513 extern int stdin_feof(void);
514 extern int stdin_ferror(void);
515 extern int stdin_ungetc(int);
517 extern void store_exit(void);
518 extern gstring *string_append(gstring *, int, ...) WARN_UNUSED_RESULT;
519 extern gstring *string_append_listele(gstring *, uschar, const uschar *) WARN_UNUSED_RESULT;
520 extern gstring *string_append_listele_n(gstring *, uschar, const uschar *, unsigned) WARN_UNUSED_RESULT;
521 extern gstring *string_append2_listele_n(gstring *, const uschar *, const uschar *, unsigned) WARN_UNUSED_RESULT;
522 extern uschar *string_base62(unsigned long int);
523 extern gstring *string_cat (gstring *, const uschar * ) WARN_UNUSED_RESULT;
524 extern gstring *string_catn(gstring *, const uschar *, int) WARN_UNUSED_RESULT;
525 extern int string_compare_by_pointer(const void *, const void *);
526 extern uschar *string_copy_dnsdomain(uschar *);
527 extern uschar *string_copy_malloc(const uschar *);
528 extern uschar *string_dequote(const uschar **);
529 extern uschar *string_format_size(int, uschar *);
530 extern int string_interpret_escape(const uschar **);
531 extern int string_is_ip_address(const uschar *, int *);
533 extern BOOL string_is_utf8(const uschar *);
535 extern const uschar *string_printing2(const uschar *, BOOL);
536 extern uschar *string_split_message(uschar *);
537 extern uschar *string_unprinting(uschar *);
539 extern uschar *string_address_utf8_to_alabel(const uschar *, uschar **);
540 extern uschar *string_domain_alabel_to_utf8(const uschar *, uschar **);
541 extern uschar *string_domain_utf8_to_alabel(const uschar *, uschar **);
542 extern uschar *string_localpart_alabel_to_utf8(const uschar *, uschar **);
543 extern uschar *string_localpart_utf8_to_alabel(const uschar *, uschar **);
546 #define string_format(buf, siz, fmt, ...) \
547 string_format_trc(buf, siz, US __FUNCTION__, __LINE__, fmt, __VA_ARGS__)
548 extern BOOL string_format_trc(uschar *, int, const uschar *, unsigned,
549 const char *, ...) ALMOST_PRINTF(5,6);
551 #define string_vformat(g, flgs, fmt, ap) \
552 string_vformat_trc(g, US __FUNCTION__, __LINE__, \
553 STRING_SPRINTF_BUFFER_SIZE, flgs, fmt, ap)
554 extern gstring *string_vformat_trc(gstring *, const uschar *, unsigned,
555 unsigned, unsigned, const char *, va_list);
557 #define string_open_failed(fmt, ...) \
558 string_open_failed_trc(US __FUNCTION__, __LINE__, fmt, __VA_ARGS__)
559 extern uschar *string_open_failed_trc(const uschar *, unsigned,
560 const char *, ...) PRINTF_FUNCTION(3,4);
562 #define string_nextinlist(lp, sp, b, l) \
563 string_nextinlist_trc((lp), (sp), (b), (l), US __FUNCTION__, __LINE__)
564 extern uschar *string_nextinlist_trc(const uschar **listptr, int *separator, uschar *buffer, int buflen,
565 const uschar * func, int line);
567 extern int strcmpic(const uschar *, const uschar *);
568 extern int strncmpic(const uschar *, const uschar *, int);
569 extern uschar *strstric(uschar *, uschar *, BOOL);
571 extern int test_harness_fudged_queue_time(int);
572 extern void tcp_init(void);
573 #ifdef EXIM_TFO_PROBE
574 extern void tfo_probe(void);
576 extern void tls_modify_variables(tls_support *);
577 extern uschar *tod_stamp(int);
579 extern BOOL transport_check_waiting(const uschar *, const uschar *, int, uschar *,
580 BOOL *, oicf, void*);
581 extern void transport_init(void);
582 extern void transport_do_pass_socket(const uschar *, const uschar *,
583 const uschar *, uschar *, int);
584 extern BOOL transport_pass_socket(const uschar *, const uschar *, const uschar *, uschar *,
586 extern uschar *transport_rcpt_address(address_item *, BOOL);
587 extern BOOL transport_set_up_command(const uschar ***, uschar *,
588 BOOL, int, address_item *, uschar *, uschar **);
589 extern void transport_update_waiting(host_item *, uschar *);
590 extern BOOL transport_write_block(transport_ctx *, uschar *, int, BOOL);
591 extern void transport_write_reset(int);
592 extern BOOL transport_write_string(int, const char *, ...);
593 extern BOOL transport_headers_send(transport_ctx *,
594 BOOL (*)(transport_ctx *, uschar *, int));
595 extern gstring * transport_show_supported(gstring *);
596 extern BOOL transport_write_message(transport_ctx *, int);
597 extern void tree_add_duplicate(uschar *, address_item *);
598 extern void tree_add_nonrecipient(uschar *);
599 extern void tree_add_unusable(host_item *);
600 extern void tree_dup(tree_node **, tree_node *);
601 extern int tree_insertnode(tree_node **, tree_node *);
602 extern tree_node *tree_search(tree_node *, const uschar *);
603 extern void tree_write(tree_node *, FILE *);
604 extern void tree_walk(tree_node *, void (*)(uschar*, uschar*, void*), void *);
606 #ifdef WITH_CONTENT_SCAN
607 extern void unspool_mbox(void);
610 extern void utf8_version_report(FILE *);
613 extern int verify_address(address_item *, FILE *, int, int, int, int,
614 uschar *, uschar *, BOOL *);
615 extern int verify_check_dnsbl(int, const uschar **, uschar **);
616 extern int verify_check_header_address(uschar **, uschar **, int, int, int,
617 uschar *, uschar *, int, int *);
618 extern int verify_check_headers(uschar **);
619 extern int verify_check_header_names_ascii(uschar **);
620 extern int verify_check_host(uschar **);
621 extern int verify_check_notblind(BOOL);
622 extern int verify_check_given_host(const uschar **, const host_item *);
623 extern int verify_check_this_host(const uschar **, unsigned int *,
624 const uschar*, const uschar *, const uschar **);
625 extern address_item *verify_checked_sender(uschar *);
626 extern void verify_get_ident(int);
627 extern void verify_quota(uschar *);
628 extern int verify_quota_call(const uschar *, int, int, uschar **);
629 extern BOOL verify_sender(int *, uschar **);
630 extern BOOL verify_sender_preliminary(int *, uschar **);
631 extern void version_init(void);
633 extern BOOL write_chunk(transport_ctx *, uschar *, int);
634 extern ssize_t write_to_fd_buf(int, const uschar *, size_t);
637 /******************************************************************************/
638 /* Predicate: if an address is in a tainted pool.
639 By extension, a variable pointing to this address is tainted.
643 is_tainted(const void * p)
645 #if defined(COMPILE_UTILITY) || defined(MACRO_PREDEF) || defined(EM_VERSION_C)
649 extern BOOL is_tainted_fn(const void *);
650 return is_tainted_fn(p);
654 /******************************************************************************/
655 /* String functions */
656 static inline uschar * __Ustrcat(uschar * dst, const uschar * src, const char * func, int line)
658 #if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
659 if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrcat", CUS func, line);
661 return US strcat(CS dst, CCS src);
663 static inline uschar * __Ustrcpy(uschar * dst, const uschar * src, const char * func, int line)
665 #if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
666 if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrcpy", CUS func, line);
668 return US strcpy(CS dst, CCS src);
670 static inline uschar * __Ustrncat(uschar * dst, const uschar * src, size_t n, const char * func, int line)
672 #if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
673 if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrncat", CUS func, line);
675 return US strncat(CS dst, CCS src, n);
677 static inline uschar * __Ustrncpy(uschar * dst, const uschar * src, size_t n, const char * func, int line)
679 #if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
680 if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrncpy", CUS func, line);
682 return US strncpy(CS dst, CCS src, n);
684 /*XXX will likely need unchecked copy also */
687 /* Advance the string pointer given over any whitespace.
688 Return the next char as there's enought places using it to be useful. */
690 #define Uskip_whitespace(sp) skip_whitespace(CUSS sp)
692 static inline uschar skip_whitespace(const uschar ** sp)
693 { while (isspace(**sp)) (*sp)++; return **sp; }
696 /******************************************************************************/
698 #if !defined(MACRO_PREDEF) && !defined(COMPILE_UTILITY)
699 /* exim_chown - in some NFSv4 setups *seemes* to be an issue with
700 chown(<exim-uid>, <exim-gid>).
702 Probably because the idmapping is broken, misconfigured or set up in
703 an unusal way. (see Bug 2931). As I'm not sure, if this was a single
704 case of misconfiguration, or if there are more such broken systems
705 out, I try to impose as least impact as possible and for now just write
706 a panic log entry pointing to the bug report. You're encouraged to
707 contact the developers, if you experience this issue.
709 fd the file descriptor (or -1 if not valid)
710 name the file name for error messages or for file operations,
715 returns 0 on success, -1 on failure */
718 exim_fchown(int fd, uid_t owner, gid_t group, const uschar *name)
720 return fchown(fd, owner, group)
721 ? exim_chown_failure(fd, name, owner, group) : 0;
725 exim_chown(const uschar *name, uid_t owner, gid_t group)
727 return chown(CCS name, owner, group)
728 ? exim_chown_failure(-1, name, owner, group) : 0;
730 #endif /* !MACRO_PREDEF && !COMPILE_UTILITY */
732 /******************************************************************************/
733 /* String functions */
735 #if !defined(MACRO_PREDEF)
736 /*************************************************
737 * Copy and save string *
738 *************************************************/
740 /* This function assumes that memcpy() is faster than strcpy().
741 The result is explicitly nul-terminated.
744 static inline uschar *
745 string_copyn_taint_trc(const uschar * s, unsigned len,
746 BOOL tainted, const char * func, int line)
748 uschar * ss = store_get_3(len + 1, tainted, func, line);
754 static inline uschar *
755 string_copy_taint_trc(const uschar * s, BOOL tainted, const char * func, int line)
756 { return string_copyn_taint_trc(s, Ustrlen(s), tainted, func, line); }
758 static inline uschar *
759 string_copyn_trc(const uschar * s, unsigned len, const char * func, int line)
760 { return string_copyn_taint_trc(s, len, is_tainted(s), func, line); }
761 static inline uschar *
762 string_copy_trc(const uschar * s, const char * func, int line)
763 { return string_copy_taint_trc(s, is_tainted(s), func, line); }
766 /* String-copy functions explicitly setting the taint status */
768 #define string_copyn_taint(s, len, tainted) \
769 string_copyn_taint_trc((s), (len), (tainted), __FUNCTION__, __LINE__)
770 #define string_copy_taint(s, tainted) \
771 string_copy_taint_trc((s), (tainted), __FUNCTION__, __LINE__)
773 /* Simple string-copy functions maintaining the taint */
775 #define string_copyn(s, len) \
776 string_copyn_trc((s), (len), __FUNCTION__, __LINE__)
777 #define string_copy(s) \
778 string_copy_trc((s), __FUNCTION__, __LINE__)
781 /*************************************************
782 * Copy, lowercase and save string *
783 *************************************************/
786 Argument: string to copy
787 Returns: copy of string in new store, with letters lowercased
790 static inline uschar *
791 string_copylc(const uschar *s)
793 uschar *ss = store_get(Ustrlen(s) + 1, is_tainted(s));
795 while (*s != 0) *p++ = tolower(*s++);
802 /*************************************************
803 * Copy, lowercase, and save string, given length *
804 *************************************************/
806 /* It is assumed the data contains no zeros. A zero is added
811 n number of characters
813 Returns: copy of string in new store, with letters lowercased
816 static inline uschar *
817 string_copynlc(uschar *s, int n)
819 uschar *ss = store_get(n + 1, is_tainted(s));
821 while (n-- > 0) *p++ = tolower(*s++);
827 # ifndef COMPILE_UTILITY
828 /*************************************************
829 * Copy and save string in longterm store *
830 *************************************************/
832 /* This function assumes that memcpy() is faster than strcpy().
834 Argument: string to copy
835 Returns: copy of string in new store
838 static inline uschar *
839 string_copy_perm(const uschar *s, BOOL force_taint)
841 int old_pool = store_pool;
842 int len = Ustrlen(s) + 1;
845 store_pool = POOL_PERM;
846 ss = store_get(len, force_taint || is_tainted(s));
848 store_pool = old_pool;
855 /* sprintf into a buffer, taint-unchecked */
858 string_format_nt(uschar * buf, int siz, const char * fmt, ...)
860 gstring gs = { .size = siz, .ptr = 0, .s = buf };
863 (void) string_vformat(&gs, SVFMT_TAINT_NOCHK, fmt, ap);
869 /******************************************************************************/
870 /* Growable-string functions */
872 /* Create a growable-string with some preassigned space */
874 #define string_get_tainted(size, tainted) \
875 string_get_tainted_trc((size), (tainted), __FUNCTION__, __LINE__)
877 static inline gstring *
878 string_get_tainted_trc(unsigned size, BOOL tainted, const char * func, unsigned line)
880 gstring * g = store_get_3(sizeof(gstring) + size, tainted, func, line);
887 #define string_get(size) \
888 string_get_trc((size), __FUNCTION__, __LINE__)
890 static inline gstring *
891 string_get_trc(unsigned size, const char * func, unsigned line)
893 return string_get_tainted_trc(size, FALSE, func, line);
896 /* NUL-terminate the C string in the growable-string, and return it. */
898 static inline uschar *
899 string_from_gstring(gstring * g)
906 static inline unsigned
907 gstring_length(const gstring * g)
909 return g ? (unsigned)g->ptr : 0;
913 #define gstring_release_unused(g) \
914 gstring_release_unused_trc(g, __FUNCTION__, __LINE__)
917 gstring_release_unused_trc(gstring * g, const char * file, unsigned line)
919 if (g) store_release_above_3(g->s + (g->size = g->ptr + 1), file, line);
923 /* sprintf-append to a growable-string */
925 #define string_fmt_append(g, fmt, ...) \
926 string_fmt_append_f_trc(g, US __FUNCTION__, __LINE__, \
927 SVFMT_EXTEND|SVFMT_REBUFFER, fmt, __VA_ARGS__)
929 #define string_fmt_append_f(g, flgs, fmt, ...) \
930 string_fmt_append_f_trc(g, US __FUNCTION__, __LINE__, \
931 flgs, fmt, __VA_ARGS__)
933 static inline gstring *
934 string_fmt_append_f_trc(gstring * g, const uschar * func, unsigned line,
935 unsigned flags, const char *format, ...)
938 va_start(ap, format);
939 g = string_vformat_trc(g, func, line, STRING_SPRINTF_BUFFER_SIZE,
946 /* Copy the content of a string to tainted memory */
949 gstring_rebuffer(gstring * g)
951 uschar * s = store_get(g->size, TRUE);
952 memcpy(s, g->s, g->ptr);
957 /******************************************************************************/
959 #define store_get_dns_answer() store_get_dns_answer_trc(CUS __FUNCTION__, __LINE__)
961 static inline dns_answer *
962 store_get_dns_answer_trc(const uschar * func, unsigned line)
964 return store_get_3(sizeof(dns_answer), TRUE, CCS func, line); /* use tainted mem */
967 /******************************************************************************/
968 /* Routines with knowledge of spool layout */
970 # ifndef COMPILE_UTILITY
972 spool_pname_buf(uschar * buf, int len)
974 snprintf(CS buf, len, "%s/%s/input", spool_directory, queue_name);
977 static inline uschar *
978 spool_dname(const uschar * purpose, uschar * subdir)
980 return string_sprintf("%s/%s/%s/%s",
981 spool_directory, queue_name, purpose, subdir);
985 static inline uschar *
986 spool_q_sname(const uschar * purpose, const uschar * q, uschar * subdir)
988 return string_sprintf("%s%s%s%s%s",
991 *subdir ? "/" : "", subdir);
994 static inline uschar *
995 spool_sname(const uschar * purpose, uschar * subdir)
997 return spool_q_sname(purpose, queue_name, subdir);
1000 static inline uschar *
1001 spool_q_fname(const uschar * purpose, const uschar * q,
1002 const uschar * subdir, const uschar * fname, const uschar * suffix)
1004 return string_sprintf("%s/%s/%s/%s/%s%s",
1005 spool_directory, q, purpose, subdir, fname, suffix);
1008 static inline uschar *
1009 spool_fname(const uschar * purpose, const uschar * subdir, const uschar * fname,
1010 const uschar * suffix)
1012 #ifdef COMPILE_UTILITY /* version avoiding string-extension */
1013 int len = Ustrlen(spool_directory) + 1 + Ustrlen(queue_name) + 1 + Ustrlen(purpose) + 1
1014 + Ustrlen(subdir) + 1 + Ustrlen(fname) + Ustrlen(suffix) + 1;
1015 uschar * buf = store_get(len, FALSE);
1016 string_format(buf, len, "%s/%s/%s/%s/%s%s",
1017 spool_directory, queue_name, purpose, subdir, fname, suffix);
1020 return spool_q_fname(purpose, queue_name, subdir, fname, suffix);
1025 set_subdir_str(uschar * subdir_str, const uschar * name,
1026 int search_sequence)
1028 subdir_str[0] = split_spool_directory == (search_sequence == 0)
1030 subdir_str[1] = '\0';
1033 /******************************************************************************/
1034 /* Time calculations */
1037 timesince(struct timeval * diff, const struct timeval * then)
1039 gettimeofday(diff, NULL);
1040 diff->tv_sec -= then->tv_sec;
1041 if ((diff->tv_usec -= then->tv_usec) < 0)
1044 diff->tv_usec += 1000*1000;
1048 static inline uschar *
1049 string_timediff(const struct timeval * diff)
1051 static uschar buf[sizeof("0.000s")];
1053 if (diff->tv_sec >= 5 || !LOGGING(millisec))
1054 return readconf_printtime((int)diff->tv_sec);
1056 snprintf(CS buf, sizeof(buf), "%u.%03us", (uint)diff->tv_sec, (uint)diff->tv_usec/1000);
1061 static inline uschar *
1062 string_timesince(const struct timeval * then)
1064 struct timeval diff;
1065 timesince(&diff, then);
1066 return string_timediff(&diff);
1070 report_time_since(const struct timeval * t0, const uschar * where)
1072 # ifdef MEASURE_TIMING
1073 struct timeval diff;
1074 timesince(&diff, t0);
1075 fprintf(stderr, "%d %s:\t%ld.%06ld\n",
1076 (uint)getpid(), where, (long)diff.tv_sec, (long)diff.tv_usec);
1082 testharness_pause_ms(int millisec)
1084 #ifndef MEASURE_TIMING
1085 if (f.running_in_test_harness && f.testsuite_delays) millisleep(millisec);
1089 /******************************************************************************/
1090 /* Taint-checked file opens */
1093 exim_open2(const char *pathname, int flags)
1095 if (!is_tainted(pathname)) return open(pathname, flags);
1096 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1101 exim_open(const char *pathname, int flags, mode_t mode)
1103 if (!is_tainted(pathname)) return open(pathname, flags, mode);
1104 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1108 #ifdef EXIM_HAVE_OPENAT
1110 exim_openat(int dirfd, const char *pathname, int flags)
1112 if (!is_tainted(pathname)) return openat(dirfd, pathname, flags);
1113 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1118 exim_openat4(int dirfd, const char *pathname, int flags, mode_t mode)
1120 if (!is_tainted(pathname)) return openat(dirfd, pathname, flags, mode);
1121 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1127 static inline FILE *
1128 exim_fopen(const char *pathname, const char *mode)
1130 if (!is_tainted(pathname)) return fopen(pathname, mode);
1131 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1137 exim_opendir(const uschar * name)
1139 if (!is_tainted(name)) return opendir(CCS name);
1140 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted dirname '%s'", name);
1145 /******************************************************************************/
1146 # if !defined(COMPILE_UTILITY)
1147 /* Process manipulation */
1150 exim_fork(const unsigned char * purpose)
1153 DEBUG(D_any) debug_printf("%s forking for %s\n", process_purpose, purpose);
1154 if ((pid = fork()) == 0)
1156 process_purpose = purpose;
1157 DEBUG(D_any) debug_printf("postfork: %s\n", purpose);
1161 testharness_pause_ms(100); /* let child work */
1162 DEBUG(D_any) debug_printf("%s forked for %s: %d\n", process_purpose, purpose, (int)pid);
1169 child_open_exim(int * fdptr, const uschar * purpose)
1170 { return child_open_exim_function(fdptr, purpose); }
1173 child_open_exim2(int * fdptr, uschar * sender,
1174 uschar * sender_auth, const uschar * purpose)
1175 { return child_open_exim2_function(fdptr, sender, sender_auth, purpose); }
1178 child_open(uschar **argv, uschar **envp, int newumask, int *infdptr,
1179 int *outfdptr, BOOL make_leader, const uschar * purpose)
1180 { return child_open_function(argv, envp, newumask, infdptr,
1181 outfdptr, make_leader, purpose);
1184 # endif /* !COMPILE_UTILITY */
1186 /******************************************************************************/
1187 #endif /* !MACRO_PREDEF */
1189 #endif /* _FUNCTIONS_H_ */
1193 /* End of functions.h */