1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
9 /* Prototypes for functions that appear in various modules. Gathered together
10 to avoid having a lot of tiddly little headers with only a couple of lines in
11 them. However, some functions that are used (or not used) by utility programs
12 are in in fact in separate headers. */
21 extern gstring *call_perl_cat(gstring *, uschar **, uschar *,
22 uschar **) WARN_UNUSED_RESULT;
23 extern void cleanup_perl(void);
24 extern uschar *init_perl(uschar *);
30 std_dh_prime_default(void);
32 std_dh_prime_named(const uschar *);
34 extern uschar * tls_cert_crl_uri(void *, uschar * mod);
35 extern uschar * tls_cert_ext_by_oid(void *, uschar *, int);
36 extern uschar * tls_cert_issuer(void *, uschar * mod);
37 extern uschar * tls_cert_not_before(void *, uschar * mod);
38 extern uschar * tls_cert_not_after(void *, uschar * mod);
39 extern uschar * tls_cert_ocsp_uri(void *, uschar * mod);
40 extern uschar * tls_cert_serial_number(void *, uschar * mod);
41 extern uschar * tls_cert_signature(void *, uschar * mod);
42 extern uschar * tls_cert_signature_algorithm(void *, uschar * mod);
43 extern uschar * tls_cert_subject(void *, uschar * mod);
44 extern uschar * tls_cert_subject_altname(void *, uschar * mod);
45 extern uschar * tls_cert_version(void *, uschar * mod);
47 extern uschar * tls_cert_der_b64(void * cert);
48 extern uschar * tls_cert_fprt_md5(void *);
49 extern uschar * tls_cert_fprt_sha1(void *);
50 extern uschar * tls_cert_fprt_sha256(void *);
52 extern void tls_clean_env(void);
53 extern BOOL tls_client_start(client_conn_ctx *, smtp_connect_args *,
54 void *, tls_support *, uschar **);
56 extern void tls_close(void *, int);
57 extern BOOL tls_could_read(void);
58 extern void tls_daemon_init(void);
59 extern BOOL tls_dropprivs_validate_require_cipher(BOOL);
60 extern BOOL tls_export_cert(uschar *, size_t, void *);
61 extern int tls_feof(void);
62 extern int tls_ferror(void);
63 extern void tls_free_cert(void **);
64 extern int tls_getc(unsigned);
65 extern uschar *tls_getbuf(unsigned *);
66 extern void tls_get_cache(void);
67 extern BOOL tls_import_cert(const uschar *, void **);
68 extern int tls_read(void *, uschar *, size_t);
69 extern int tls_server_start(const uschar *, uschar **);
70 extern BOOL tls_smtp_buffered(void);
71 extern int tls_ungetc(int);
72 extern int tls_write(void *, const uschar *, size_t, BOOL);
73 extern uschar *tls_validate_require_cipher(void);
74 extern void tls_version_report(FILE *);
76 extern BOOL tls_openssl_options_parse(uschar *, long *);
78 extern uschar * tls_field_from_dn(uschar *, const uschar *);
79 extern BOOL tls_is_name_for_cert(const uschar *, void *);
82 extern int tlsa_lookup(const host_item *, dns_answer *, BOOL);
85 #endif /*DISABLE_TLS*/
88 /* Everything else... */
90 extern acl_block *acl_read(uschar *(*)(void), uschar **);
91 extern int acl_check(int, uschar *, uschar *, uschar **, uschar **);
92 extern int acl_eval(int, uschar *, uschar **, uschar **);
94 extern tree_node *acl_var_create(uschar *);
95 extern void acl_var_write(uschar *, uschar *, void *);
97 #ifdef EXPERIMENTAL_ARC
98 extern void *arc_ams_setup_sign_bodyhash(void);
99 extern const uschar *arc_header_feed(gstring *, BOOL);
100 extern gstring *arc_sign(const uschar *, gstring *, uschar **);
101 extern void arc_sign_init(void);
102 extern const uschar *acl_verify_arc(void);
103 extern uschar * fn_arc_domains(void);
106 extern void assert_no_variables(void *, int, const char *, int);
107 extern int auth_call_pam(const uschar *, uschar **);
108 extern int auth_call_pwcheck(uschar *, uschar **);
109 extern int auth_call_radius(const uschar *, uschar **);
110 extern int auth_call_saslauthd(const uschar *, const uschar *,
111 const uschar *, const uschar *, uschar **);
112 extern int auth_check_serv_cond(auth_instance *);
113 extern int auth_check_some_cond(auth_instance *, uschar *, uschar *, int);
114 extern int auth_client_item(void *, auth_instance *, const uschar **,
115 unsigned, int, uschar *, int);
118 extern int auth_get_data(uschar **, const uschar *, int);
119 extern int auth_get_no64_data(uschar **, uschar *);
120 extern int auth_prompt(const uschar *);
121 extern int auth_read_input(const uschar *);
122 extern void auth_show_supported(FILE *);
123 extern uschar *auth_xtextencode(uschar *, int);
124 extern int auth_xtextdecode(uschar *, uschar **);
126 #ifdef EXPERIMENTAL_ARC
127 extern gstring *authres_arc(gstring *);
130 extern gstring *authres_dkim(gstring *);
133 extern gstring *authres_dmarc(gstring *);
135 extern gstring *authres_smtpauth(gstring *);
137 extern gstring *authres_spf(gstring *);
140 extern uschar *b64encode(const uschar *, int);
141 extern uschar *b64encode_taint(const uschar *, int, BOOL);
142 extern int b64decode(const uschar *, uschar **);
143 extern int bdat_getc(unsigned);
144 extern uschar *bdat_getbuf(unsigned *);
145 extern int bdat_ungetc(int);
146 extern void bdat_flush_data(void);
148 extern void bits_clear(unsigned int *, size_t, int *);
149 extern void bits_set(unsigned int *, size_t, int *);
151 extern void cancel_cutthrough_connection(BOOL, const uschar *);
152 extern int check_host(void *, const uschar *, const uschar **, uschar **);
153 extern uschar **child_exec_exim(int, BOOL, int *, BOOL, int, ...);
154 extern pid_t child_open_exim_function(int *, const uschar *);
155 extern pid_t child_open_exim2_function(int *, uschar *, uschar *,
157 extern pid_t child_open_function(uschar **, uschar **, int,
158 int *, int *, BOOL, const uschar *);
159 extern pid_t child_open_uid(const uschar **, const uschar **, int,
160 uid_t *, gid_t *, int *, int *, uschar *, BOOL, const uschar *);
161 extern BOOL cleanup_environment(void);
162 extern void cutthrough_data_puts(uschar *, int);
163 extern void cutthrough_data_put_nl(void);
164 extern uschar *cutthrough_finaldot(void);
165 extern BOOL cutthrough_flush_send(void);
166 extern BOOL cutthrough_headers_send(void);
167 extern BOOL cutthrough_predata(void);
168 extern void release_cutthrough_connection(const uschar *);
170 extern void daemon_go(void);
172 #ifdef EXPERIMENTAL_DCC
173 extern int dcc_process(uschar **);
176 extern void debug_logging_activate(uschar *, uschar *);
177 extern void debug_logging_stop(void);
178 extern void debug_print_argv(const uschar **);
179 extern void debug_print_ids(uschar *);
180 extern void debug_printf_indent(const char *, ...) PRINTF_FUNCTION(1,2);
181 extern void debug_print_string(uschar *);
182 extern void debug_print_tree(tree_node *);
183 extern void debug_vprintf(int, const char *, va_list);
184 extern void decode_bits(unsigned int *, size_t, int *,
185 uschar *, bit_table *, int, uschar *, int);
186 extern void delete_pid_file(void);
187 extern address_item *deliver_make_addr(uschar *, BOOL);
188 extern void delivery_log(int, address_item *, int, uschar *);
189 extern int deliver_message(uschar *, BOOL, BOOL);
190 extern void deliver_msglog(const char *, ...) PRINTF_FUNCTION(1,2);
191 extern void deliver_set_expansions(address_item *);
192 extern int deliver_split_address(address_item *);
193 extern void deliver_succeeded(address_item *);
195 extern uschar *deliver_get_sender_address (uschar *id);
196 extern void delivery_re_exec(int);
198 extern void die_tainted(const uschar *, const uschar *, int);
199 extern BOOL directory_make(const uschar *, const uschar *, int, BOOL);
201 extern uschar *dkim_exim_query_dns_txt(const uschar *);
202 extern void dkim_exim_sign_init(void);
204 extern BOOL dkim_transport_write_message(transport_ctx *,
205 struct ob_dkim *, const uschar ** errstr);
207 extern dns_address *dns_address_from_rr(dns_answer *, dns_record *);
208 extern int dns_basic_lookup(dns_answer *, const uschar *, int);
209 extern uschar *dns_build_reverse(const uschar *);
210 extern time_t dns_expire_from_soa(dns_answer *, int);
211 extern void dns_init(BOOL, BOOL, BOOL);
212 extern BOOL dns_is_aa(const dns_answer *);
213 extern BOOL dns_is_secure(const dns_answer *);
214 extern int dns_lookup(dns_answer *, const uschar *, int, const uschar **);
215 extern void dns_pattern_init(void);
216 extern int dns_special_lookup(dns_answer *, const uschar *, int, const uschar **);
217 extern dns_record *dns_next_rr(const dns_answer *, dns_scan *, int);
218 extern uschar *dns_text_type(int);
219 extern void dscp_list_to_stream(FILE *);
220 extern BOOL dscp_lookup(const uschar *, int, int *, int *, int *);
222 extern void enq_end(uschar *);
223 extern BOOL enq_start(uschar *, unsigned);
224 #ifndef DISABLE_EVENT
225 extern uschar *event_raise(uschar *, const uschar *, uschar *);
226 extern void msg_event_raise(const uschar *, const address_item *);
229 extern int exim_chown_failure(int, const uschar*, uid_t, gid_t);
230 extern const uschar * exim_errstr(int);
231 extern void exim_exit(int) NORETURN;
232 extern void exim_nullstd(void);
233 extern void exim_setugid(uid_t, gid_t, BOOL, uschar *);
234 extern void exim_underbar_exit(int) NORETURN;
235 extern void exim_wait_tick(struct timeval *, int);
236 extern int exp_bool(address_item *addr,
237 uschar *mtype, uschar *mname, unsigned dgb_opt, uschar *oname, BOOL bvalue,
238 uschar *svalue, BOOL *rvalue);
239 extern BOOL expand_check_condition(uschar *, uschar *, uschar *);
240 extern uschar *expand_file_big_buffer(const uschar *);
241 extern uschar *expand_string(uschar *); /* public, cannot make const */
242 extern const uschar *expand_cstring(const uschar *); /* ... so use this one */
243 extern uschar *expand_hide_passwords(uschar * );
244 extern uschar *expand_string_copy(const uschar *);
245 extern int_eximarith_t expand_string_integer(uschar *, BOOL);
246 extern void modify_variable(uschar *, void *);
248 extern BOOL fd_ready(int, time_t);
250 extern int filter_interpret(uschar *, int, address_item **, uschar **);
251 extern BOOL filter_personal(string_item *, BOOL);
252 extern BOOL filter_runtest(int, uschar *, BOOL, BOOL);
253 extern BOOL filter_system_interpret(address_item **, uschar **);
255 extern uschar * fn_hdrs_added(void);
257 extern void header_add(int, const char *, ...);
258 extern header_line *header_add_at_position_internal(BOOL, uschar *, BOOL, int, const char *, ...);
259 extern int header_checkname(header_line *, BOOL);
260 extern BOOL header_match(uschar *, BOOL, BOOL, string_item *, int, ...);
261 extern int host_address_extract_port(uschar *);
262 extern uschar *host_and_ident(BOOL);
263 extern int host_aton(const uschar *, int *);
264 extern void host_build_hostlist(host_item **, const uschar *, BOOL);
265 extern ip_address_item *host_build_ifacelist(const uschar *, uschar *);
266 extern void host_build_log_info(void);
267 extern void host_build_sender_fullhost(void);
268 extern int host_find_byname(host_item *, const uschar *, int,
269 const uschar **, BOOL);
270 extern int host_find_bydns(host_item *, const uschar *, int, uschar *, uschar *,
271 uschar *, const dnssec_domains *, const uschar **, BOOL *);
272 extern ip_address_item *host_find_interfaces(void);
273 extern BOOL host_is_in_net(const uschar *, const uschar *, int);
274 extern BOOL host_is_tls_on_connect_port(int);
275 extern int host_item_get_port(host_item *);
276 extern void host_mask(int, int *, int);
277 extern int host_name_lookup(void);
278 extern int host_nmtoa(int, int *, int, uschar *, int);
279 extern uschar *host_ntoa(int, const void *, uschar *, int *);
280 extern int host_scan_for_local_hosts(host_item *, host_item **, BOOL *);
282 extern uschar *imap_utf7_encode(uschar *, const uschar *,
283 uschar, uschar *, uschar **);
285 extern void invert_address(uschar *, uschar *);
286 extern int ip_addr(void *, int, const uschar *, int);
287 extern int ip_bind(int, int, uschar *, int);
288 extern int ip_connect(int, int, const uschar *, int, int, const blob *);
289 extern int ip_connectedsocket(int, const uschar *, int, int,
290 int, host_item *, uschar **, const blob *);
291 extern int ip_get_address_family(int);
292 extern void ip_keepalive(int, const uschar *, BOOL);
293 extern int ip_recv(client_conn_ctx *, uschar *, int, time_t);
294 extern int ip_socket(int, int);
296 extern int ip_tcpsocket(const uschar *, uschar **, int, host_item *);
297 extern int ip_unixsocket(const uschar *, uschar **);
298 extern int ip_streamsocket(const uschar *, uschar **, int, host_item *);
300 extern int ipv6_nmtoa(int *, uschar *);
302 extern uschar *local_part_quote(uschar *);
303 extern int log_create(uschar *);
304 extern int log_create_as_exim(uschar *);
305 extern void log_close_all(void);
307 extern macro_item * macro_create(const uschar *, const uschar *, BOOL);
308 extern BOOL macro_read_assignment(uschar *);
309 extern uschar *macros_expand(int, int *, BOOL *);
310 extern void mainlog_close(void);
311 #ifdef WITH_CONTENT_SCAN
312 extern int malware(const uschar *, int);
313 extern int malware_in_file(uschar *);
314 extern void malware_init(void);
315 extern void malware_show_supported(FILE *);
317 extern int match_address_list(const uschar *, BOOL, BOOL, const uschar **,
318 unsigned int *, int, int, const uschar **);
319 extern int match_address_list_basic(const uschar *, const uschar **, int);
320 extern int match_check_list(const uschar **, int, tree_node **, unsigned int **,
321 int(*)(void *, const uschar *, const uschar **, uschar **), void *, int,
322 const uschar *, const uschar **);
323 extern int match_isinlist(const uschar *, const uschar **, int, tree_node **,
324 unsigned int *, int, BOOL, const uschar **);
325 extern int match_check_string(const uschar *, const uschar *, int, BOOL, BOOL, BOOL,
327 extern void md5_end(md5 *, const uschar *, int, uschar *);
328 extern void md5_mid(md5 *, const uschar *);
329 extern void md5_start(md5 *);
330 extern void millisleep(int);
331 #ifdef WITH_CONTENT_SCAN
332 struct mime_boundary_context;
333 extern int mime_acl_check(uschar *acl, FILE *f,
334 struct mime_boundary_context *, uschar **, uschar **);
335 extern int mime_decode(const uschar **);
336 extern ssize_t mime_decode_base64(FILE *, FILE *, uschar *);
337 extern int mime_regex(const uschar **);
338 extern void mime_set_anomaly(int);
340 extern uschar *moan_check_errorcopy(uschar *);
341 extern BOOL moan_skipped_syntax_errors(uschar *, error_block *, uschar *,
343 extern void moan_smtp_batch(uschar *, const char *, ...) PRINTF_FUNCTION(2,3);
344 extern BOOL moan_send_message(uschar *, int, error_block *eblock,
345 header_line *, FILE *, uschar *);
346 extern void moan_tell_someone(uschar *, address_item *,
347 const uschar *, const char *, ...) PRINTF_FUNCTION(4,5);
348 extern BOOL moan_to_sender(int, error_block *, header_line *, FILE *, BOOL);
349 extern void moan_write_from(FILE *);
350 extern void moan_write_references(FILE *, uschar *);
351 extern FILE *modefopen(const uschar *, const char *, mode_t);
353 extern int open_cutthrough_connection( address_item * addr );
355 extern uschar *parse_extract_address(uschar *, uschar **, int *, int *, int *,
357 extern int parse_forward_list(uschar *, int, address_item **, uschar **,
358 const uschar *, uschar *, error_block **);
359 extern uschar *parse_find_address_end(uschar *, BOOL);
360 extern uschar *parse_find_at(uschar *);
361 extern const uschar *parse_fix_phrase(const uschar *, int, uschar *, int);
362 extern uschar *parse_message_id(uschar *, uschar **, uschar **);
363 extern const uschar *parse_quote_2047(const uschar *, int, uschar *, uschar *, int, BOOL);
364 extern uschar *parse_date_time(uschar *str, time_t *t);
365 extern int vaguely_random_number(int);
367 extern int vaguely_random_number_fallback(int);
370 extern BOOL queue_action(uschar *, int, uschar **, int, int);
371 extern void queue_check_only(void);
372 extern unsigned queue_count(void);
373 extern unsigned queue_count_cached(void);
374 extern void queue_list(int, uschar **, int);
375 #ifdef EXPERIMENTAL_QUEUE_RAMP
376 extern void queue_notify_daemon(const uschar * hostname);
378 extern void queue_run(uschar *, uschar *, BOOL);
380 extern int random_number(int);
381 extern const uschar *rc_to_string(int);
382 extern int rda_interpret(redirect_block *, int, uschar *, uschar *,
383 uschar *, uschar *, uschar *, ugid_block *, address_item **,
384 uschar **, error_block **, int *, uschar *);
385 extern int rda_is_filter(const uschar *);
386 extern BOOL readconf_depends(driver_instance *, uschar *);
387 extern void readconf_driver_init(uschar *, driver_instance **,
388 driver_info *, int, void *, int, optionlist *, int);
389 extern uschar *readconf_find_option(void *);
390 extern void readconf_main(BOOL);
391 extern void readconf_options_from_list(optionlist *, unsigned, const uschar *, uschar *);
392 extern BOOL readconf_print(uschar *, uschar *, BOOL);
393 extern uschar *readconf_printtime(int);
394 extern uschar *readconf_readname(uschar *, int, uschar *);
395 extern int readconf_readtime(const uschar *, int, BOOL);
396 extern void readconf_rest(void);
397 extern uschar *readconf_retry_error(const uschar *, const uschar *, int *, int *);
398 extern void readconf_save_config(const uschar *);
399 extern void read_message_body(BOOL);
400 extern void receive_bomb_out(uschar *, uschar *) NORETURN;
401 extern BOOL receive_check_fs(int);
402 extern BOOL receive_check_set_sender(uschar *);
403 extern BOOL receive_msg(BOOL);
404 extern int_eximarith_t receive_statvfs(BOOL, int *);
405 extern void receive_swallow_smtp(void);
406 #ifdef WITH_CONTENT_SCAN
407 extern int regex(const uschar **);
409 extern BOOL regex_match_and_setup(const pcre *, const uschar *, int, int);
410 extern const pcre *regex_must_compile(const uschar *, BOOL, BOOL);
411 extern void retry_add_item(address_item *, uschar *, int);
412 extern BOOL retry_check_address(const uschar *, host_item *, uschar *, BOOL,
413 uschar **, uschar **);
414 extern retry_config *retry_find_config(const uschar *, const uschar *, int, int);
415 extern BOOL retry_ultimate_address_timeout(uschar *, const uschar *,
416 dbdata_retry *, time_t);
417 extern void retry_update(address_item **, address_item **, address_item **);
418 extern uschar *rewrite_address(uschar *, BOOL, BOOL, rewrite_rule *, int);
419 extern uschar *rewrite_address_qualify(uschar *, BOOL);
420 extern header_line *rewrite_header(header_line *,
421 const uschar *, const uschar *,
422 rewrite_rule *, int, BOOL);
423 extern uschar *rewrite_one(uschar *, int, BOOL *, BOOL, uschar *,
425 extern void rewrite_test(uschar *);
426 extern uschar *rfc2047_decode2(uschar *, BOOL, uschar *, int, int *, int *,
428 extern int route_address(address_item *, address_item **, address_item **,
429 address_item **, address_item **, int);
430 extern int route_check_prefix(const uschar *, const uschar *, unsigned *);
431 extern int route_check_suffix(const uschar *, const uschar *, unsigned *);
432 extern BOOL route_findgroup(uschar *, gid_t *);
433 extern BOOL route_finduser(const uschar *, struct passwd **, uid_t *);
434 extern BOOL route_find_expanded_group(uschar *, uschar *, uschar *, gid_t *,
436 extern BOOL route_find_expanded_user(uschar *, uschar *, uschar *,
437 struct passwd **, uid_t *, uschar **);
438 extern void route_init(void);
439 extern void route_show_supported(FILE *);
440 extern void route_tidyup(void);
442 extern uschar *search_find(void *, const uschar *, uschar *, int,
443 const uschar *, int, int, int *, const uschar *);
444 extern int search_findtype(const uschar *, int);
445 extern int search_findtype_partial(const uschar *, int *, const uschar **, int *,
446 int *, const uschar **);
447 extern void *search_open(const uschar *, int, int, uid_t *, gid_t *);
448 extern void search_tidyup(void);
449 extern void set_process_info(const char *, ...) PRINTF_FUNCTION(1,2);
450 extern void sha1_end(hctx *, const uschar *, int, uschar *);
451 extern void sha1_mid(hctx *, const uschar *);
452 extern void sha1_start(hctx *);
453 extern int sieve_interpret(uschar *, int, uschar *, uschar *, uschar *,
454 uschar *, address_item **, uschar **);
455 extern void sigalrm_handler(int);
456 extern BOOL smtp_buffered(void);
457 extern void smtp_closedown(uschar *);
458 extern void smtp_command_timeout_exit(void) NORETURN;
459 extern void smtp_command_sigterm_exit(void) NORETURN;
460 extern void smtp_data_timeout_exit(void) NORETURN;
461 extern void smtp_data_sigint_exit(void) NORETURN;
462 extern void smtp_deliver_init(void);
463 extern uschar *smtp_cmd_hist(void);
464 extern int smtp_connect(smtp_connect_args *, const blob *);
465 extern int smtp_sock_connect(host_item *, int, int, uschar *,
466 transport_instance * tb, int, const blob *);
467 extern int smtp_feof(void);
468 extern int smtp_ferror(void);
469 extern uschar *smtp_get_connection_info(void);
470 extern BOOL smtp_get_interface(uschar *, int, address_item *,
471 uschar **, uschar *);
472 extern BOOL smtp_get_port(uschar *, address_item *, int *, uschar *);
473 extern int smtp_getc(unsigned);
474 extern uschar *smtp_getbuf(unsigned *);
475 extern void smtp_get_cache(void);
476 extern int smtp_handle_acl_fail(int, int, uschar *, uschar *);
477 extern void smtp_log_no_mail(void);
478 extern void smtp_message_code(uschar **, int *, uschar **, uschar **, BOOL);
479 extern void smtp_proxy_tls(void *, uschar *, size_t, int *, int) NORETURN;
480 extern BOOL smtp_read_response(void *, uschar *, int, int, int);
481 extern void *smtp_reset(void *);
482 extern void smtp_respond(uschar *, int, BOOL, uschar *);
483 extern void smtp_notquit_exit(uschar *, uschar *, uschar *, ...);
484 extern void smtp_port_for_connect(host_item *, int);
485 extern void smtp_send_prohibition_message(int, uschar *);
486 extern int smtp_setup_msg(void);
487 extern BOOL smtp_start_session(void);
488 extern int smtp_ungetc(int);
489 extern BOOL smtp_verify_helo(void);
490 extern int smtp_write_command(void *, int, const char *, ...) PRINTF_FUNCTION(3,4);
491 #ifdef WITH_CONTENT_SCAN
492 extern int spam(const uschar **);
493 extern FILE *spool_mbox(unsigned long *, const uschar *, uschar **);
495 extern void spool_clear_header_globals(void);
496 extern BOOL spool_move_message(uschar *, uschar *, uschar *, uschar *);
497 extern int spool_open_datafile(uschar *);
498 extern int spool_open_temp(uschar *);
499 extern int spool_read_header(uschar *, BOOL, BOOL);
500 extern int spool_write_header(uschar *, int, uschar **);
501 extern int stdin_getc(unsigned);
502 extern int stdin_feof(void);
503 extern int stdin_ferror(void);
504 extern int stdin_ungetc(int);
506 extern void store_exit(void);
507 extern gstring *string_append(gstring *, int, ...) WARN_UNUSED_RESULT;
508 extern gstring *string_append_listele(gstring *, uschar, const uschar *) WARN_UNUSED_RESULT;
509 extern gstring *string_append_listele_n(gstring *, uschar, const uschar *, unsigned) WARN_UNUSED_RESULT;
510 extern gstring *string_append2_listele_n(gstring *, const uschar *, const uschar *, unsigned) WARN_UNUSED_RESULT;
511 extern uschar *string_base62(unsigned long int);
512 extern gstring *string_cat (gstring *, const uschar * ) WARN_UNUSED_RESULT;
513 extern gstring *string_catn(gstring *, const uschar *, int) WARN_UNUSED_RESULT;
514 extern int string_compare_by_pointer(const void *, const void *);
515 extern uschar *string_copy_dnsdomain(uschar *);
516 extern uschar *string_copy_malloc(const uschar *);
517 extern uschar *string_dequote(const uschar **);
518 extern uschar *string_format_size(int, uschar *);
519 extern int string_interpret_escape(const uschar **);
520 extern int string_is_ip_address(const uschar *, int *);
522 extern BOOL string_is_utf8(const uschar *);
524 extern uschar *string_nextinlist(const uschar **, int *, uschar *, int);
525 extern const uschar *string_printing2(const uschar *, BOOL);
526 extern uschar *string_split_message(uschar *);
527 extern uschar *string_unprinting(uschar *);
529 extern uschar *string_address_utf8_to_alabel(const uschar *, uschar **);
530 extern uschar *string_domain_alabel_to_utf8(const uschar *, uschar **);
531 extern uschar *string_domain_utf8_to_alabel(const uschar *, uschar **);
532 extern uschar *string_localpart_alabel_to_utf8(const uschar *, uschar **);
533 extern uschar *string_localpart_utf8_to_alabel(const uschar *, uschar **);
536 #define string_format(buf, siz, fmt, ...) \
537 string_format_trc(buf, siz, US __FUNCTION__, __LINE__, fmt, __VA_ARGS__)
538 extern BOOL string_format_trc(uschar *, int, const uschar *, unsigned,
539 const char *, ...) ALMOST_PRINTF(5,6);
541 #define string_vformat(g, flgs, fmt, ap) \
542 string_vformat_trc(g, US __FUNCTION__, __LINE__, \
543 STRING_SPRINTF_BUFFER_SIZE, flgs, fmt, ap)
544 extern gstring *string_vformat_trc(gstring *, const uschar *, unsigned,
545 unsigned, unsigned, const char *, va_list);
547 #define string_open_failed(eno, fmt, ...) \
548 string_open_failed_trc(eno, US __FUNCTION__, __LINE__, fmt, __VA_ARGS__)
549 extern uschar *string_open_failed_trc(int, const uschar *, unsigned,
550 const char *, ...) PRINTF_FUNCTION(4,5);
552 extern int strcmpic(const uschar *, const uschar *);
553 extern int strncmpic(const uschar *, const uschar *, int);
554 extern uschar *strstric(uschar *, uschar *, BOOL);
556 extern int test_harness_fudged_queue_time(int);
557 extern void tcp_init(void);
558 #ifdef EXIM_TFO_PROBE
559 extern void tfo_probe(void);
561 extern void tls_modify_variables(tls_support *);
562 extern uschar *tod_stamp(int);
564 extern BOOL transport_check_waiting(const uschar *, const uschar *, int, uschar *,
565 BOOL *, oicf, void*);
566 extern void transport_init(void);
567 extern void transport_do_pass_socket(const uschar *, const uschar *,
568 const uschar *, uschar *, int);
569 extern BOOL transport_pass_socket(const uschar *, const uschar *, const uschar *, uschar *,
571 extern uschar *transport_rcpt_address(address_item *, BOOL);
572 extern BOOL transport_set_up_command(const uschar ***, uschar *,
573 BOOL, int, address_item *, uschar *, uschar **);
574 extern void transport_update_waiting(host_item *, uschar *);
575 extern BOOL transport_write_block(transport_ctx *, uschar *, int, BOOL);
576 extern void transport_write_reset(int);
577 extern BOOL transport_write_string(int, const char *, ...);
578 extern BOOL transport_headers_send(transport_ctx *,
579 BOOL (*)(transport_ctx *, uschar *, int));
580 extern void transport_show_supported(FILE *);
581 extern BOOL transport_write_message(transport_ctx *, int);
582 extern void tree_add_duplicate(uschar *, address_item *);
583 extern void tree_add_nonrecipient(uschar *);
584 extern void tree_add_unusable(host_item *);
585 extern void tree_dup(tree_node **, tree_node *);
586 extern int tree_insertnode(tree_node **, tree_node *);
587 extern tree_node *tree_search(tree_node *, const uschar *);
588 extern void tree_write(tree_node *, FILE *);
589 extern void tree_walk(tree_node *, void (*)(uschar*, uschar*, void*), void *);
591 #ifdef WITH_CONTENT_SCAN
592 extern void unspool_mbox(void);
595 extern void utf8_version_report(FILE *);
598 extern int verify_address(address_item *, FILE *, int, int, int, int,
599 uschar *, uschar *, BOOL *);
600 extern int verify_check_dnsbl(int, const uschar **, uschar **);
601 extern int verify_check_header_address(uschar **, uschar **, int, int, int,
602 uschar *, uschar *, int, int *);
603 extern int verify_check_headers(uschar **);
604 extern int verify_check_header_names_ascii(uschar **);
605 extern int verify_check_host(uschar **);
606 extern int verify_check_notblind(BOOL);
607 extern int verify_check_given_host(const uschar **, const host_item *);
608 extern int verify_check_this_host(const uschar **, unsigned int *,
609 const uschar*, const uschar *, const uschar **);
610 extern address_item *verify_checked_sender(uschar *);
611 extern void verify_get_ident(int);
612 extern BOOL verify_sender(int *, uschar **);
613 extern BOOL verify_sender_preliminary(int *, uschar **);
614 extern void version_init(void);
616 extern BOOL write_chunk(transport_ctx *, uschar *, int);
617 extern ssize_t write_to_fd_buf(int, const uschar *, size_t);
620 /******************************************************************************/
621 /* Predicate: if an address is in a tainted pool.
622 By extension, a variable pointing to this address is tainted.
626 is_tainted(const void * p)
628 #if defined(COMPILE_UTILITY) || defined(MACRO_PREDEF) || defined(EM_VERSION_C)
632 extern BOOL is_tainted_fn(const void *);
633 return is_tainted_fn(p);
637 /******************************************************************************/
638 /* String functions */
639 static inline uschar * __Ustrcat(uschar * dst, const uschar * src, const char * func, int line)
641 #if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
642 if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrcat", CUS func, line);
644 return US strcat(CS dst, CCS src);
646 static inline uschar * __Ustrcpy(uschar * dst, const uschar * src, const char * func, int line)
648 #if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
649 if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrcpy", CUS func, line);
651 return US strcpy(CS dst, CCS src);
653 static inline uschar * __Ustrncat(uschar * dst, const uschar * src, size_t n, const char * func, int line)
655 #if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
656 if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrncat", CUS func, line);
658 return US strncat(CS dst, CCS src, n);
660 static inline uschar * __Ustrncpy(uschar * dst, const uschar * src, size_t n, const char * func, int line)
662 #if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
663 if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrncpy", CUS func, line);
665 return US strncpy(CS dst, CCS src, n);
667 /*XXX will likely need unchecked copy also */
670 /* Advance the string pointer given over any whitespace.
671 Return the next char as there's enought places using it to be useful. */
673 #define Uskip_whitespace(sp) skip_whitespace(CUSS sp)
675 static inline uschar skip_whitespace(const uschar ** sp)
676 { while (isspace(**sp)) (*sp)++; return **sp; }
679 /******************************************************************************/
681 #if !defined(MACRO_PREDEF) && !defined(COMPILE_UTILITY)
682 /* exim_chown - in some NFSv4 setups *seemes* to be an issue with
683 chown(<exim-uid>, <exim-gid>).
685 Probably because the idmapping is broken, misconfigured or set up in
686 an unusal way. (see Bug 2931). As I'm not sure, if this was a single
687 case of misconfiguration, or if there are more such broken systems
688 out, I try to impose as least impact as possible and for now just write
689 a panic log entry pointing to the bug report. You're encouraged to
690 contact the developers, if you experience this issue.
692 fd the file descriptor (or -1 if not valid)
693 name the file name for error messages or for file operations,
698 returns 0 on success, -1 on failure */
701 exim_fchown(int fd, uid_t owner, gid_t group, const uschar *name)
703 return fchown(fd, owner, group)
704 ? exim_chown_failure(fd, name, owner, group) : 0;
708 exim_chown(const uschar *name, uid_t owner, gid_t group)
710 return chown(CCS name, owner, group)
711 ? exim_chown_failure(-1, name, owner, group) : 0;
713 #endif /* !MACRO_PREDEF && !COMPILE_UTILITY */
715 /******************************************************************************/
716 /* String functions */
718 #if !defined(MACRO_PREDEF)
719 /*************************************************
720 * Copy and save string *
721 *************************************************/
723 /* This function assumes that memcpy() is faster than strcpy().
724 The result is explicitly nul-terminated.
727 static inline uschar *
728 string_copyn_taint_trc(const uschar * s, unsigned len,
729 BOOL tainted, const char * func, int line)
731 uschar * ss = store_get_3(len + 1, tainted, func, line);
737 static inline uschar *
738 string_copy_taint_trc(const uschar * s, BOOL tainted, const char * func, int line)
739 { return string_copyn_taint_trc(s, Ustrlen(s), tainted, func, line); }
741 static inline uschar *
742 string_copyn_trc(const uschar * s, unsigned len, const char * func, int line)
743 { return string_copyn_taint_trc(s, len, is_tainted(s), func, line); }
744 static inline uschar *
745 string_copy_trc(const uschar * s, const char * func, int line)
746 { return string_copy_taint_trc(s, is_tainted(s), func, line); }
749 /* String-copy functions explicitly setting the taint status */
751 #define string_copyn_taint(s, len, tainted) \
752 string_copyn_taint_trc((s), (len), (tainted), __FUNCTION__, __LINE__)
753 #define string_copy_taint(s, tainted) \
754 string_copy_taint_trc((s), (tainted), __FUNCTION__, __LINE__)
756 /* Simple string-copy functions maintaining the taint */
758 #define string_copyn(s, len) \
759 string_copyn_taint_trc((s), (len), is_tainted(s), __FUNCTION__, __LINE__)
760 #define string_copy(s) \
761 string_copy_taint_trc((s), is_tainted(s), __FUNCTION__, __LINE__)
764 /*************************************************
765 * Copy, lowercase and save string *
766 *************************************************/
769 Argument: string to copy
770 Returns: copy of string in new store, with letters lowercased
773 static inline uschar *
774 string_copylc(const uschar *s)
776 uschar *ss = store_get(Ustrlen(s) + 1, is_tainted(s));
778 while (*s != 0) *p++ = tolower(*s++);
785 /*************************************************
786 * Copy, lowercase, and save string, given length *
787 *************************************************/
789 /* It is assumed the data contains no zeros. A zero is added
794 n number of characters
796 Returns: copy of string in new store, with letters lowercased
799 static inline uschar *
800 string_copynlc(uschar *s, int n)
802 uschar *ss = store_get(n + 1, is_tainted(s));
804 while (n-- > 0) *p++ = tolower(*s++);
810 # ifndef COMPILE_UTILITY
811 /*************************************************
812 * Copy and save string in longterm store *
813 *************************************************/
815 /* This function assumes that memcpy() is faster than strcpy().
817 Argument: string to copy
818 Returns: copy of string in new store
821 static inline uschar *
822 string_copy_perm(const uschar *s, BOOL force_taint)
824 int old_pool = store_pool;
825 int len = Ustrlen(s) + 1;
828 store_pool = POOL_PERM;
829 ss = store_get(len, force_taint || is_tainted(s));
831 store_pool = old_pool;
838 /* sprintf into a buffer, taint-unchecked */
841 string_format_nt(uschar * buf, int siz, const char * fmt, ...)
843 gstring gs = { .size = siz, .ptr = 0, .s = buf };
846 (void) string_vformat(&gs, SVFMT_TAINT_NOCHK, fmt, ap);
852 /******************************************************************************/
853 /* Growable-string functions */
855 /* Create a growable-string with some preassigned space */
857 #define string_get_tainted(size, tainted) \
858 string_get_tainted_trc((size), (tainted), __FUNCTION__, __LINE__)
860 static inline gstring *
861 string_get_tainted_trc(unsigned size, BOOL tainted, const char * func, unsigned line)
863 gstring * g = store_get_3(sizeof(gstring) + size, tainted, func, line);
870 #define string_get(size) \
871 string_get_trc((size), __FUNCTION__, __LINE__)
873 static inline gstring *
874 string_get_trc(unsigned size, const char * func, unsigned line)
876 return string_get_tainted_trc(size, FALSE, func, line);
879 /* NUL-terminate the C string in the growable-string, and return it. */
881 static inline uschar *
882 string_from_gstring(gstring * g)
889 static inline unsigned
890 gstring_length(const gstring * g)
892 return g ? (unsigned)g->ptr : 0;
896 #define gstring_release_unused(g) \
897 gstring_release_unused_trc(g, __FUNCTION__, __LINE__)
900 gstring_release_unused_trc(gstring * g, const char * file, unsigned line)
902 if (g) store_release_above_3(g->s + (g->size = g->ptr + 1), file, line);
906 /* sprintf-append to a growable-string */
908 #define string_fmt_append(g, fmt, ...) \
909 string_fmt_append_f_trc(g, US __FUNCTION__, __LINE__, \
910 SVFMT_EXTEND|SVFMT_REBUFFER, fmt, __VA_ARGS__)
912 #define string_fmt_append_f(g, flgs, fmt, ...) \
913 string_fmt_append_f_trc(g, US __FUNCTION__, __LINE__, \
914 flgs, fmt, __VA_ARGS__)
916 static inline gstring *
917 string_fmt_append_f_trc(gstring * g, const uschar * func, unsigned line,
918 unsigned flags, const char *format, ...)
921 va_start(ap, format);
922 g = string_vformat_trc(g, func, line, STRING_SPRINTF_BUFFER_SIZE,
929 /* Copy the content of a string to tainted memory */
932 gstring_rebuffer(gstring * g)
934 uschar * s = store_get(g->size, TRUE);
935 memcpy(s, g->s, g->ptr);
940 /******************************************************************************/
942 #define store_get_dns_answer() store_get_dns_answer_trc(CUS __FUNCTION__, __LINE__)
944 static inline dns_answer *
945 store_get_dns_answer_trc(const uschar * func, unsigned line)
947 return store_get_3(sizeof(dns_answer), TRUE, CCS func, line); /* use tainted mem */
950 /******************************************************************************/
951 /* Routines with knowledge of spool layout */
953 # ifndef COMPILE_UTILITY
955 spool_pname_buf(uschar * buf, int len)
957 snprintf(CS buf, len, "%s/%s/input", spool_directory, queue_name);
960 static inline uschar *
961 spool_dname(const uschar * purpose, uschar * subdir)
963 return string_sprintf("%s/%s/%s/%s",
964 spool_directory, queue_name, purpose, subdir);
968 static inline uschar *
969 spool_q_sname(const uschar * purpose, const uschar * q, uschar * subdir)
971 return string_sprintf("%s%s%s%s%s",
974 *subdir ? "/" : "", subdir);
977 static inline uschar *
978 spool_sname(const uschar * purpose, uschar * subdir)
980 return spool_q_sname(purpose, queue_name, subdir);
983 static inline uschar *
984 spool_q_fname(const uschar * purpose, const uschar * q,
985 const uschar * subdir, const uschar * fname, const uschar * suffix)
987 return string_sprintf("%s/%s/%s/%s/%s%s",
988 spool_directory, q, purpose, subdir, fname, suffix);
991 static inline uschar *
992 spool_fname(const uschar * purpose, const uschar * subdir, const uschar * fname,
993 const uschar * suffix)
995 #ifdef COMPILE_UTILITY /* version avoiding string-extension */
996 int len = Ustrlen(spool_directory) + 1 + Ustrlen(queue_name) + 1 + Ustrlen(purpose) + 1
997 + Ustrlen(subdir) + 1 + Ustrlen(fname) + Ustrlen(suffix) + 1;
998 uschar * buf = store_get(len, FALSE);
999 string_format(buf, len, "%s/%s/%s/%s/%s%s",
1000 spool_directory, queue_name, purpose, subdir, fname, suffix);
1003 return spool_q_fname(purpose, queue_name, subdir, fname, suffix);
1008 set_subdir_str(uschar * subdir_str, const uschar * name,
1009 int search_sequence)
1011 subdir_str[0] = split_spool_directory == (search_sequence == 0)
1013 subdir_str[1] = '\0';
1016 /******************************************************************************/
1017 /* Time calculations */
1020 timesince(struct timeval * diff, const struct timeval * then)
1022 gettimeofday(diff, NULL);
1023 diff->tv_sec -= then->tv_sec;
1024 if ((diff->tv_usec -= then->tv_usec) < 0)
1027 diff->tv_usec += 1000*1000;
1031 static inline uschar *
1032 string_timediff(const struct timeval * diff)
1034 static uschar buf[sizeof("0.000s")];
1036 if (diff->tv_sec >= 5 || !LOGGING(millisec))
1037 return readconf_printtime((int)diff->tv_sec);
1039 snprintf(CS buf, sizeof(buf), "%u.%03us", (uint)diff->tv_sec, (uint)diff->tv_usec/1000);
1044 static inline uschar *
1045 string_timesince(const struct timeval * then)
1047 struct timeval diff;
1048 timesince(&diff, then);
1049 return string_timediff(&diff);
1053 report_time_since(const struct timeval * t0, const uschar * where)
1055 # ifdef MEASURE_TIMING
1056 struct timeval diff;
1057 timesince(&diff, t0);
1058 fprintf(stderr, "%d %s:\t%ld.%06ld\n",
1059 (uint)getpid(), where, (long)diff.tv_sec, (long)diff.tv_usec);
1065 testharness_pause_ms(int millisec)
1067 #ifndef MEASURE_TIMING
1068 if (f.running_in_test_harness && f.testsuite_delays) millisleep(millisec);
1072 /******************************************************************************/
1073 /* Taint-checked file opens */
1076 exim_open2(const char *pathname, int flags)
1078 if (!is_tainted(pathname)) return open(pathname, flags);
1079 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1084 exim_open(const char *pathname, int flags, mode_t mode)
1086 if (!is_tainted(pathname)) return open(pathname, flags, mode);
1087 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1092 exim_openat(int dirfd, const char *pathname, int flags)
1094 if (!is_tainted(pathname)) return openat(dirfd, pathname, flags);
1095 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1100 exim_openat4(int dirfd, const char *pathname, int flags, mode_t mode)
1102 if (!is_tainted(pathname)) return openat(dirfd, pathname, flags, mode);
1103 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1108 static inline FILE *
1109 exim_fopen(const char *pathname, const char *mode)
1111 if (!is_tainted(pathname)) return fopen(pathname, mode);
1112 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'", pathname);
1118 exim_opendir(const uschar * name)
1120 if (!is_tainted(name)) return opendir(CCS name);
1121 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted dirname '%s'", name);
1126 /******************************************************************************/
1127 # if !defined(COMPILE_UTILITY)
1128 /* Process manipulation */
1131 exim_fork(const unsigned char * purpose)
1134 DEBUG(D_any) debug_printf("%s forking for %s\n", process_purpose, purpose);
1135 if ((pid = fork()) == 0)
1137 process_purpose = purpose;
1138 DEBUG(D_any) debug_printf("postfork: %s\n", purpose);
1142 testharness_pause_ms(100); /* let child work */
1143 DEBUG(D_any) debug_printf("%s forked for %s: %d\n", process_purpose, purpose, (int)pid);
1150 child_open_exim(int * fdptr, const uschar * purpose)
1151 { return child_open_exim_function(fdptr, purpose); }
1154 child_open_exim2(int * fdptr, uschar * sender,
1155 uschar * sender_auth, const uschar * purpose)
1156 { return child_open_exim2_function(fdptr, sender, sender_auth, purpose); }
1159 child_open(uschar **argv, uschar **envp, int newumask, int *infdptr,
1160 int *outfdptr, BOOL make_leader, const uschar * purpose)
1161 { return child_open_function(argv, envp, newumask, infdptr,
1162 outfdptr, make_leader, purpose);
1165 # endif /* !COMPILE_UTILITY */
1167 /******************************************************************************/
1168 #endif /* !MACRO_PREDEF */
1170 #endif /* _FUNCTIONS_H_ */
1174 /* End of functions.h */