1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) The Exim Maintainers 2020 - 2024 */
6 /* Copyright (c) University of Cambridge 1995 - 2018 */
7 /* See the file NOTICE for conditions of use and distribution. */
8 /* SPDX-License-Identifier: GPL-2.0-or-later */
10 /* Almost all the global variables are defined together in this one header, so
11 that they are easy to find. However, those that are visible during the
12 compilation of the local_scan() function are defined separately in the
13 local_scan.h header file. */
15 /* First put any specials that are required for some operating systems. */
21 /* We need to be careful about width of int and atomicity in signal handlers,
22 especially with the rise of 64-bit systems breaking older assumptions. But
23 sig_atomic_t comes from signal.h so can't go into mytypes.h without including
24 signal support in local_scan, which seems precipitous. */
25 typedef volatile sig_atomic_t SIGNAL_BOOL;
27 /* Now things that are present only when configured. */
30 extern uschar *opt_perl_startup; /* Startup code for Perl interpreter */
31 extern BOOL opt_perl_at_start; /* Start Perl interpreter at start */
32 extern BOOL opt_perl_started; /* Set once interpreter started */
33 extern BOOL opt_perl_taintmode; /* Enable taint mode in Perl */
37 extern tree_node *dlobj_anchor; /* Tree of dynamically-loaded objects */
41 extern uschar *ibase_servers;
45 extern uschar *eldap_ca_cert_dir; /* Directory with CA certificates */
46 extern uschar *eldap_ca_cert_file; /* CA certificate file */
47 extern uschar *eldap_cert_file; /* Certificate file */
48 extern uschar *eldap_cert_key; /* Certificate key file */
49 extern uschar *eldap_cipher_suite; /* Allowed cipher suite */
50 extern uschar *eldap_default_servers; /* List of default servers */
51 extern uschar *eldap_require_cert; /* Peer certificate checking strategy */
52 extern BOOL eldap_start_tls; /* Use STARTTLS */
53 extern int eldap_version; /* LDAP version */
57 extern uschar *mysql_servers; /* List of servers and connect info */
61 extern uschar *oracle_servers; /* List of servers and connect info */
65 extern uschar *pgsql_servers; /* List of servers and connect info */
69 extern uschar *redis_servers; /* List of servers and connect info */
73 extern uschar *sqlite_dbfile; /* Filname for database */
74 extern int sqlite_lock_timeout; /* Internal lock waiting timeout */
77 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
78 extern BOOL move_frozen_messages; /* Get them out of the normal directory */
81 /* These variables are outside the #ifdef because it keeps the code less
82 cluttered in several places (e.g. during logging) if we can always refer to
83 them. Also, the tls_ variables are now always visible. */
86 client_conn_ctx active; /* fd/socket when in a TLS session, and ptr to TLS context */
87 int bits; /* bits used in TLS session */
88 BOOL certificate_verified; /* Client certificate verified */
90 BOOL dane_verified; /* ... via DANE */
91 int tlsa_usage; /* TLSA record(s) usage */
93 uschar *cipher; /* Cipher used */
94 const uschar *cipher_stdname; /* Cipher used, RFC version */
95 const uschar *ver; /* TLS version */
97 BOOL on_connect; /* For older MTAs that don't STARTTLS */
98 uschar *on_connect_ports; /* Ports always tls-on-connect */
99 void *ourcert; /* Certificate we presented, binary */
100 void *peercert; /* Certificate of peer, binary */
101 uschar *peerdn; /* DN from peer */
102 uschar *sni; /* Server Name Indication */
103 uschar *channelbinding; /* b64'd data identifying channel, for authenticators */
105 OCSP_NOT_REQ=0, /* not requested */
106 OCSP_NOT_RESP, /* no response to request */
107 OCSP_VFY_NOT_TRIED, /* response not verified */
108 OCSP_FAILED, /* verify failed */
109 OCSP_VFIED /* verified */
110 } ocsp; /* Stapled OCSP status */
111 #ifndef DISABLE_TLS_RESUME
112 hctx resume_hctx; /* session lookup key accumulation */
113 const uschar * resume_index; /* session lookup key */
115 unsigned resumption; /* Session resumption */
116 BOOL host_resumable:1;
117 BOOL ticket_received:1;
119 BOOL verify_override:1; /* certificate_verified only due to tls_try_verify_hosts */
120 BOOL ext_master_secret:1; /* extended-master-secret was used */
121 BOOL channelbind_exporter:1; /* channelbinding is EXPORTER not UNIQUE */
123 extern tls_support tls_in;
124 extern tls_support tls_out;
127 extern BOOL gnutls_compat_mode; /* Less security, more compatibility */
128 extern BOOL gnutls_allow_auto_pkcs11; /* Let GnuTLS autoload PKCS11 modules */
129 extern uschar *hosts_require_alpn; /* Mandatory ALPN successful nogitiation */
130 extern uschar *openssl_options; /* OpenSSL compatibility options */
131 extern const pcre2_code *regex_STARTTLS; /* For recognizing STARTTLS settings */
132 extern uschar *tls_alpn; /* ALPN names acceptable */
133 extern uschar *tls_certificate; /* Certificate file */
134 extern uschar *tls_crl; /* CRL File */
135 extern int tls_dh_max_bits; /* don't accept higher lib suggestions */
136 extern uschar *tls_dhparam; /* DH param file */
137 extern uschar *tls_eccurve; /* EC curve */
138 # ifndef DISABLE_OCSP
139 extern uschar *tls_ocsp_file; /* OCSP stapling proof file */
141 extern uschar *tls_privatekey; /* Private key file */
142 extern BOOL tls_remember_esmtp; /* For YAEB */
143 extern uschar *tls_require_ciphers; /* So some can be avoided */
144 # ifndef DISABLE_TLS_RESUME
145 extern uschar *tls_resumption_hosts; /* TLS session resumption */
147 extern uschar *tls_try_verify_hosts; /* Optional client verification */
148 extern uschar *tls_verify_certificates;/* Path for certificates to check */
149 extern uschar *tls_verify_hosts; /* Mandatory client verification */
150 extern int tls_watch_fd; /* for inotify of creds files */
151 extern time_t tls_watch_trigger_time; /* non-0: triggered */
153 extern uschar *tls_advertise_hosts; /* host for which TLS is advertised */
155 extern uschar *dsn_envid; /* DSN envid string */
156 extern int dsn_ret; /* DSN ret type*/
157 extern const pcre2_code *regex_DSN; /* For recognizing DSN settings */
158 extern uschar *dsn_advertise_hosts; /* host for which TLS is advertised */
160 /* Input-reading functions for messages, so we can use special ones for
163 extern int (*lwr_receive_getc)(unsigned);
164 extern uschar * (*lwr_receive_getbuf)(unsigned *);
165 extern BOOL (*lwr_receive_hasc)(void);
166 extern int (*lwr_receive_ungetc)(int);
168 extern int (*receive_getc)(unsigned);
169 extern uschar * (*receive_getbuf)(unsigned *);
170 extern BOOL (*receive_hasc)(void);
171 extern void (*receive_get_cache)(unsigned);
172 extern int (*receive_ungetc)(int);
173 extern int (*receive_feof)(void);
174 extern int (*receive_ferror)(void);
177 /* For clearing, saving, restoring address expansion variables. We have to have
178 the size of this vector set explicitly, because it is referenced from more than
181 extern const uschar **address_expansions[ADDRESS_EXPANSIONS_COUNT];
183 /* Flags for which we don't need an address ever so can use a bitfield */
185 extern struct global_flags {
186 BOOL acl_temp_details :1; /* TRUE to give details for 4xx error */
187 BOOL active_local_from_check :1; /* For adding Sender: (switchable) */
188 BOOL active_local_sender_retain :1; /* For keeping Sender: (switchable) */
189 BOOL address_test_mode :1; /* True for -bt */
190 BOOL admin_user :1; /* True if caller can do admin */
191 BOOL allow_auth_unadvertised :1; /* As it says */
192 BOOL allow_unqualified_recipient :1; /* For local messages */ /* As it says */
193 BOOL allow_unqualified_sender :1; /* Reset for SMTP */ /* Ditto */
194 BOOL authentication_local :1; /* TRUE if non-smtp (implicit authentication) */
196 BOOL background_daemon :1; /* Set FALSE to keep in foreground */
197 BOOL bdat_readers_wanted :1; /* BDAT-handling to be pushed on readfunc stack */
199 BOOL chunking_offered :1;
200 BOOL config_changed :1; /* True if -C used */
201 BOOL continue_more :1; /* Flag more addresses waiting */
203 BOOL daemon_listen :1; /* True if listening required */
204 BOOL daemon_scion :1; /* Ancestor proc is daemon, and not re-exec'd */
205 BOOL debug_daemon :1; /* Debug the daemon process only */
206 BOOL deliver_firsttime :1; /* True for first delivery attempt */
207 BOOL deliver_force :1; /* TRUE if delivery was forced */
208 BOOL deliver_freeze :1; /* TRUE if delivery is frozen */
209 BOOL deliver_force_thaw :1; /* TRUE to force thaw in queue run */
210 BOOL deliver_manual_thaw :1; /* TRUE if manually thawed */
211 BOOL deliver_selectstring_regex :1; /* String is regex */
212 BOOL deliver_selectstring_sender_regex :1; /* String is regex */
213 BOOL disable_callout_flush :1; /* Don't flush before callouts */
214 BOOL disable_delay_flush :1; /* Don't flush before "delay" in ACL */
215 BOOL disable_logging :1; /* Disables log writing when TRUE */
217 BOOL dkim_disable_verify :1; /* Set via ACL control statement. When set, DKIM verification is disabled for the current message */
218 BOOL dkim_init_done :1; /* lazy-init status */
221 BOOL dmarc_has_been_checked :1; /* Global variable to check if test has been called yet */
222 BOOL dmarc_disable_verify :1; /* Set via ACL control statement. When set, DMARC verification is disabled for the current message */
223 BOOL dmarc_enable_forensic :1; /* Set via ACL control statement. When set, DMARC forensic reports are enabled for the current message */
225 BOOL dont_deliver :1; /* TRUE for -N option */
226 BOOL dot_ends :1; /* TRUE if "." ends non-SMTP input */
228 BOOL enable_dollar_recipients :1; /* Make $recipients available */
229 BOOL expand_string_forcedfail :1; /* TRUE if failure was "expected" */
231 BOOL filter_running :1; /* TRUE while running a filter */
233 BOOL header_rewritten :1; /* TRUE if header changed by router */
234 BOOL helo_verified :1; /* True if HELO verified */
235 BOOL helo_verify_failed :1; /* True if attempt failed */
236 BOOL host_checking_callout :1; /* TRUE if real callout wanted */
237 BOOL host_find_failed_syntax :1; /* DNS syntax check failure */
239 BOOL inetd_wait_mode :1; /* Whether running in inetd wait mode */
240 BOOL is_inetd :1; /* True for inetd calls */
242 BOOL local_error_message :1; /* True if handling one of these */
243 BOOL log_testing_mode :1; /* TRUE in various testing modes */
245 #ifdef WITH_CONTENT_SCAN
246 BOOL no_mbox_unspool :1; /* don't unlink files in /scan directory */
248 BOOL no_multiline_responses :1; /* For broken clients */
249 BOOL notifier_socket_en :1; /* Permit create of notifier socket */
251 BOOL parse_allow_group :1; /* Allow group syntax */
252 BOOL parse_found_group :1; /* In the middle of a group */
253 BOOL pipelining_enable :1; /* As it says */
254 #if defined(SUPPORT_PROXY) || defined(SUPPORT_SOCKS)
255 BOOL proxy_session_failed :1; /* TRUE if required proxy negotiation failed */
258 BOOL queue_2stage :1; /* Run queue in 2-stage manner */
259 BOOL queue_only_policy :1; /* ACL or local_scan wants queue_only */
260 BOOL queue_run_local :1; /* Local deliveries only in queue run */
261 BOOL queue_running :1; /* TRUE for queue running process and */
262 BOOL queue_smtp :1; /* Disable all immediate SMTP (-odqs)*/
264 BOOL really_exim :1; /* FALSE in utilities */
265 BOOL receive_call_bombout :1; /* Flag for crashing log */
266 BOOL recipients_discarded :1; /* By an ACL */
267 BOOL running_in_test_harness :1; /*TRUE when running_status is patched */
269 BOOL search_find_defer :1; /* Set TRUE if lookup deferred */
270 BOOL sender_address_forced :1; /* Set by -f */
271 BOOL sender_host_notsocket :1; /* Set for -bs and -bS */
272 BOOL sender_host_unknown :1; /* TRUE for -bs and -bS except inetd */
273 BOOL sender_local :1; /* TRUE for local senders */
274 BOOL sender_name_forced :1; /* Set by -F */
275 BOOL sender_set_untrusted :1; /* Sender set by untrusted caller */
276 BOOL smtp_authenticated :1; /* Sending client has authenticated */
277 #ifndef DISABLE_PIPE_CONNECT
278 BOOL smtp_in_early_pipe_advertised :1; /* server advertised PIPECONNECT */
279 BOOL smtp_in_early_pipe_no_auth :1; /* too many authenticator names */
280 BOOL smtp_in_early_pipe_used :1; /* client did send early data */
282 BOOL smtp_in_pipelining_advertised :1; /* server advertised PIPELINING */
283 BOOL smtp_in_pipelining_used :1; /* server noted client using PIPELINING */
284 BOOL smtp_in_quit :1; /* server noted QUIT command */
285 BOOL spool_file_wireformat :1; /* current -D file has CRLF rather than NL */
286 BOOL submission_mode :1; /* Can be forced from ACL */
287 BOOL suppress_local_fixups :1; /* Can be forced from ACL */
288 BOOL suppress_local_fixups_default :1; /* former is reset to this; override with -G */
289 BOOL synchronous_delivery :1; /* TRUE if -odi is set */
290 BOOL system_filtering :1; /* TRUE when running system filter */
292 BOOL taint_check_slow :1; /* malloc/mmap are not returning distinct ranges */
293 BOOL testsuite_delays :1; /* interprocess sequencing delays, under testsuite */
294 BOOL tcp_fastopen_ok :1; /* appears to be supported by kernel */
295 BOOL tcp_in_fastopen :1; /* conn usefully used fastopen */
296 BOOL tcp_in_fastopen_data :1; /* fastopen carried data */
297 BOOL tcp_in_fastopen_logged :1; /* one-time logging */
298 BOOL tcp_out_fastopen_logged :1; /* one-time logging */
299 BOOL timestamps_utc :1; /* Use UTC for all times */
300 BOOL transport_filter_timed_out :1; /* True if it did */
301 BOOL trusted_caller :1; /* Caller is trusted */
302 BOOL trusted_config :1; /* Configuration file is trusted */
306 /* General global variables */
308 extern BOOL accept_8bitmime; /* Allow *BITMIME incoming */
309 extern uschar *add_environment; /* List of environment variables to add */
310 extern header_line *acl_added_headers; /* Headers added by an ACL */
311 extern tree_node *acl_anchor; /* Tree of named ACLs */
312 extern uschar *acl_arg[9]; /* Argument to ACL call */
313 extern int acl_narg; /* Number of arguments to ACL call */
314 extern int acl_level; /* Nesting depth and debug indent */
315 extern uschar *acl_not_smtp; /* ACL run for non-SMTP messages */
316 #ifdef WITH_CONTENT_SCAN
317 extern uschar *acl_not_smtp_mime; /* For MIME parts of ditto */
319 extern uschar *acl_not_smtp_start; /* ACL run at the beginning of a non-SMTP session */
320 extern uschar *acl_removed_headers; /* Headers deleted by an ACL */
321 extern uschar *acl_smtp_auth; /* ACL run for AUTH */
322 extern uschar *acl_smtp_connect; /* ACL run on SMTP connection */
323 extern uschar *acl_smtp_data; /* ACL run after DATA received */
325 extern uschar *acl_smtp_data_prdr; /* ACL run after DATA received if in PRDR mode*/
326 extern const pcre2_code *regex_PRDR; /* For recognizing PRDR settings */
329 extern uschar *acl_smtp_dkim; /* ACL run for DKIM signatures / domains */
331 extern uschar *acl_smtp_etrn; /* ACL run for ETRN */
332 extern uschar *acl_smtp_expn; /* ACL run for EXPN */
333 extern uschar *acl_smtp_helo; /* ACL run for HELO/EHLO */
334 extern uschar *acl_smtp_mail; /* ACL run for MAIL */
335 extern uschar *acl_smtp_mailauth; /* ACL run for MAIL AUTH */
336 #ifdef WITH_CONTENT_SCAN
337 extern uschar *acl_smtp_mime; /* ACL run after DATA, before acl_smtp_data, for each MIME part */
339 extern uschar *acl_smtp_notquit; /* ACL run for disconnects */
340 extern uschar *acl_smtp_predata; /* ACL run for DATA command */
341 extern uschar *acl_smtp_quit; /* ACL run for QUIT */
342 extern uschar *acl_smtp_rcpt; /* ACL run for RCPT */
343 extern uschar *acl_smtp_starttls; /* ACL run for STARTTLS */
344 extern uschar *acl_smtp_vrfy; /* ACL run for VRFY */
345 #ifndef DISABLE_WELLKNOWN
346 extern uschar *acl_smtp_wellknown; /* ACL run for WELLKNOWN */
348 extern tree_node *acl_var_c; /* ACL connection variables */
349 extern tree_node *acl_var_m; /* ACL message variables */
350 extern uschar *acl_verify_message; /* User message for verify failure */
351 extern string_item *acl_warn_logged; /* Logged lines */
352 extern uschar *acl_wherecodes[]; /* Response codes for ACL fails */
353 extern uschar *acl_wherenames[]; /* Names for messages */
354 extern address_item *addr_duplicate; /* Duplicate address list */
355 extern address_item address_defaults; /* Default data for address item */
356 extern const uschar *address_file; /* Name of file when delivering to one */
357 extern const uschar *address_pipe; /* Pipe command when delivering to one */
358 extern tree_node *addresslist_anchor; /* Tree of defined address lists */
359 extern int addresslist_count; /* Number defined */
360 extern gid_t *admin_groups; /* List of admin groups */
361 extern BOOL allow_domain_literals; /* As it says */
362 extern BOOL allow_mx_to_ip; /* Allow MX records to -> ip address */
363 #ifdef EXPERIMENTAL_ARC
364 extern struct arc_set *arc_received; /* highest ARC instance evaluation struct */
365 extern int arc_received_instance; /* highest ARC instance number in headers */
366 extern int arc_oldest_pass; /* lowest passing instance number in headers */
367 extern const uschar *arc_state; /* verification state */
368 extern const uschar *arc_state_reason;
370 extern BOOL allow_utf8_domains; /* For experimenting */
371 extern uschar *authenticated_fail_id; /* ID that failed authentication */
372 extern uschar *authenticated_id; /* ID that was authenticated */
373 extern uschar *authenticated_sender; /* From AUTH on MAIL */
374 extern BOOL authentication_failed; /* TRUE if AUTH was tried and failed */
375 extern uschar *authenticator_name; /* for debug and error messages */
376 extern uschar *auth_advertise_hosts; /* Only advertise to these */
377 extern auth_info * auths_available; /* List of available auth mechanisms */
378 extern auth_instance *auths; /* Chain of instantiated auths */
379 extern auth_instance auth_defaults; /* Default values */
380 extern uschar *auth_defer_msg; /* Error message for log */
381 extern uschar *auth_defer_user_msg; /* Error message for user */
382 extern const uschar *auth_vars[]; /* $authn variables */
383 extern int auto_thaw; /* Auto-thaw interval */
384 #ifdef WITH_CONTENT_SCAN
385 extern int av_failed; /* TRUE if the AV process failed */
386 extern uschar *av_scanner; /* AntiVirus scanner to use for the malware condition */
389 extern uschar *base62_chars; /* Table of base-62 characters */
390 extern uschar *bi_command; /* Command for -bi option */
391 extern uschar *big_buffer; /* Used for various temp things */
392 extern int big_buffer_size; /* Current size (can expand) */
393 #ifdef EXPERIMENTAL_BRIGHTMAIL
394 extern uschar *bmi_alt_location; /* expansion variable that contains the alternate location for the rcpt (available during routing) */
395 extern uschar *bmi_base64_tracker_verdict; /* expansion variable with base-64 encoded OLD verdict string (available during routing) */
396 extern uschar *bmi_base64_verdict; /* expansion variable with base-64 encoded verdict string (available during routing) */
397 extern uschar *bmi_config_file; /* Brightmail config file */
398 extern int bmi_deliver; /* Flag that determines if the message should be delivered to the rcpt (available during routing) */
399 extern int bmi_run; /* Flag that determines if message should be run through Brightmail server */
400 extern uschar *bmi_verdicts; /* BASE64-encoded verdicts with recipient lists */
402 extern int bsmtp_transaction_linecount; /* Start of last transaction */
403 extern int body_8bitmime; /* sender declared BODY= ; 7=7BIT, 8=8BITMIME */
404 extern uschar *bounce_message_file; /* Template file */
405 extern uschar *bounce_message_text; /* One-liner */
406 extern const uschar *bounce_recipient; /* When writing an errmsg */
407 extern BOOL bounce_return_body; /* Include body in returned message */
408 extern int bounce_return_linesize_limit; /* Max line length in return */
409 extern BOOL bounce_return_message; /* Include message in bounce */
410 extern int bounce_return_size_limit; /* Max amount to return */
411 extern uschar *bounce_sender_authentication; /* AUTH address for bounces */
413 extern uschar *callout_address; /* Address used for a malware/spamd/verify etc. callout */
414 extern int callout_cache_domain_positive_expire; /* Time for positive domain callout cache records to expire */
415 extern int callout_cache_domain_negative_expire; /* Time for negative domain callout cache records to expire */
416 extern int callout_cache_positive_expire; /* Time for positive callout cache records to expire */
417 extern int callout_cache_negative_expire; /* Time for negative callout cache records to expire */
418 extern uschar *callout_random_local_part; /* Local part to be used to check if server called will accept any local part */
419 extern uschar *check_dns_names_pattern;/* Regex for syntax check */
420 extern int check_log_inodes; /* Minimum for message acceptance */
421 extern int_eximarith_t check_log_space; /* Minimum for message acceptance */
422 extern BOOL check_rfc2047_length; /* Check RFC 2047 encoded string length */
423 extern int check_spool_inodes; /* Minimum for message acceptance */
424 extern int_eximarith_t check_spool_space; /* Minimum for message acceptance */
425 extern uschar *chunking_advertise_hosts; /* RFC 3030 CHUNKING */
426 extern unsigned chunking_datasize;
427 extern unsigned chunking_data_left;
428 extern chunking_state_t chunking_state;
429 extern uschar *client_authenticator; /* Authenticator name used for smtp delivery */
430 extern uschar *client_authenticated_id; /* "login" name used for SMTP AUTH */
431 extern uschar *client_authenticated_sender; /* AUTH option to SMTP MAIL FROM (not yet used) */
432 #ifndef DISABLE_CLIENT_CMD_LOG
433 extern gstring *client_cmd_log; /* debug log of client cmds & responses */
435 extern int clmacro_count; /* Number of command line macros */
436 extern uschar *clmacros[]; /* Copy of them, for re-exec */
437 extern BOOL commandline_checks_require_admin; /* belt and braces for insecure setups */
438 extern const uschar *connection_id; /* connection cookie for log */
439 extern int connection_max_messages;/* Max down one SMTP connection */
440 extern FILE *config_file; /* Configuration file */
441 extern const uschar *config_filename; /* Configuration file name */
442 extern gid_t config_gid; /* Additional group owner */
443 extern int config_lineno; /* Line number */
444 extern const uschar *config_main_filelist; /* List of possible config files */
445 extern uschar *config_main_filename; /* File name actually used */
446 extern uschar *config_main_directory; /* Directory where the main config file was found */
447 extern uid_t config_uid; /* Additional owner */
448 extern unsigned continue_flags; /* TLS-related info for connection */
449 #ifndef DISABLE_ESMTP_LIMITS
450 extern unsigned continue_limit_mail; /* Peer advertised limit */
451 extern unsigned continue_limit_rcpt;
452 extern unsigned continue_limit_rcptdom;
454 extern int continue_fd; /* Connection for continuation */
455 extern uschar *continue_proxy_cipher; /* TLS cipher for proxied continued delivery */
456 extern BOOL continue_proxy_dane; /* proxied conn is DANE */
457 extern uschar *continue_proxy_sni; /* proxied conn SNI */
458 extern const uschar *continue_hostname; /* Host for continued delivery */
459 extern const uschar *continue_host_address; /* IP address for ditto */
460 extern uschar continue_next_id[]; /* Next message_id from hintsdb */
461 extern int continue_sequence; /* Sequence num for continued delivery */
462 extern const uschar *continue_transport; /* Transport for continued delivery */
463 #ifndef COMPILE_UTILITY
464 extern open_db *continue_retry_db; /* Hintsdb for retries */
465 extern open_db *continue_wait_db; /* Hintsdb for wait-transport */
469 extern uschar *csa_status; /* Client SMTP Authorization result */
472 unsigned callout_hold_only:1; /* Conn is only for verify callout */
473 unsigned delivery:1; /* When to attempt */
474 unsigned defer_pass:1; /* Pass 4xx to caller rather than spooling */
475 unsigned is_tls:1; /* Conn has TLS active */
476 client_conn_ctx cctx; /* Open connection */
477 int nrcpt; /* Count of addresses */
478 uschar * transport; /* Name of transport */
479 uschar * interface; /* (address of) */
480 uschar * snd_ip; /* sending_ip_address */
481 int snd_port; /* sending_port */
482 unsigned peer_options; /* smtp_peer_options */
483 host_item host; /* Host used */
484 address_item addr; /* (Chain of) addresses */
486 extern cut_t cutthrough; /* Deliver-concurrently */
488 extern int daemon_notifier_fd; /* Unix socket for notifications */
489 extern uschar *daemon_smtp_port; /* Can be a list of ports */
490 extern int daemon_startup_retries; /* Number of times to retry */
491 extern int daemon_startup_sleep; /* Sleep between retries */
493 #ifdef EXPERIMENTAL_DCC
494 extern BOOL dcc_direct_add_header; /* directly add header */
495 extern uschar *dcc_header; /* dcc header */
496 extern uschar *dcc_result; /* dcc result */
497 extern uschar *dccifd_address; /* address of the dccifd daemon */
498 extern uschar *dccifd_options; /* options for the dccifd daemon */
501 extern int debug_fd; /* The fd for debug_file */
502 extern FILE *debug_file; /* Where to write debugging info */
503 extern int debug_notall[]; /* Debug options excluded from +all */
504 extern bit_table debug_options[]; /* Table of debug options */
505 extern int debug_options_count; /* Size of table */
506 extern unsigned debug_pretrigger_bsize;
507 extern uschar *debug_pretrigger_buf; /* circular buffer for precapture */
508 extern BOOL debug_store; /* Do extra checks on store_reset */
509 extern uschar debuglog_name[LOG_NAME_SIZE]; /* ACL-init debug */
511 extern int delay_warning[]; /* Times between warnings */
512 extern uschar *delay_warning_condition; /* Condition string for warnings */
513 extern BOOL delivery_date_remove; /* Remove delivery-date headers */
515 extern uschar *deliver_address_data; /* Arbitrary data for an address */
516 extern int deliver_datafile; /* FD for data part of message */
517 extern const uschar *deliver_domain; /* The local domain for delivery */
518 extern uschar *deliver_domain_data; /* From domain lookup */
519 extern const uschar *deliver_domain_orig; /* The original local domain for delivery */
520 extern const uschar *deliver_domain_parent; /* The parent domain for delivery */
521 extern BOOL deliver_drop_privilege; /* TRUE for unprivileged delivery */
522 extern time_t deliver_frozen_at; /* Time of freezing */
523 extern uschar *deliver_home; /* Home directory for pipes */
524 extern const uschar *deliver_host; /* (First) host for routed local deliveries */
525 /* Remote host for filter */
526 extern const uschar *deliver_host_address; /* Address for remote delivery filter */
527 extern int deliver_host_port; /* Address for remote delivery filter */
528 extern uschar *deliver_in_buffer; /* Buffer for copying file */
529 extern ino_t deliver_inode; /* Inode for appendfile */
530 extern const uschar *deliver_localpart;/* The local part for delivery */
531 extern uschar *deliver_localpart_data; /* From local part lookup (de-tainted) */
532 extern const uschar *deliver_localpart_orig; /* The original local part for delivery */
533 extern const uschar *deliver_localpart_parent; /* The parent local part for delivery */
534 extern const uschar *deliver_localpart_prefix; /* The stripped prefix, if any */
535 extern const uschar *deliver_localpart_prefix_v; /* The stripped-prefix variable portion, if any */
536 extern const uschar *deliver_localpart_suffix; /* The stripped suffix, if any */
537 extern const uschar *deliver_localpart_suffix_v; /* The stripped-suffix variable portion, if any */
538 extern uschar *deliver_out_buffer; /* Buffer for copying file */
539 extern int deliver_queue_load_max; /* Different value for queue running */
540 extern address_item *deliver_recipients; /* Current set of addresses */
541 extern uschar *deliver_selectstring; /* For selecting by recipient */
542 extern uschar *deliver_selectstring_sender; /* For selecting by sender */
543 #ifdef ENABLE_DISABLE_FSYNC
544 extern BOOL disable_fsync; /* Not for normal use */
546 extern BOOL disable_ipv6; /* Don't do any IPv6 things */
549 extern unsigned dkim_collect_input; /* Runtime count of dkim signtures; tracks whether SMTP input is fed to DKIM validation */
550 extern uschar *dkim_cur_signer; /* Expansion variable, holds the current "signer" domain or identity during a acl_smtp_dkim run */
551 extern int dkim_key_length; /* Expansion variable, length of signing key in bits */
552 extern void *dkim_signatures; /* Actually a (pdkim_signature *) but most files do not need to know */
553 extern uschar *dkim_signers; /* Expansion variable, holds colon-separated list of domains and identities that have signed a message */
554 extern gstring *dkim_signing_record; /* domains+selectors used */
555 extern uschar *dkim_signing_domain; /* Expansion variable, domain used for signing a message. */
556 extern uschar *dkim_signing_selector; /* Expansion variable, selector used for signing a message. */
557 extern uschar *dkim_verify_hashes; /* Preference order for signatures */
558 extern uschar *dkim_verify_keytypes; /* Preference order for signatures */
559 extern uschar *dkim_verify_min_keysizes; /* list of minimum key sizes, keyed by algo */
560 extern BOOL dkim_verify_minimal; /* Shortcircuit signature verification */
561 extern uschar *dkim_verify_overall; /* First successful domain verified, or null */
562 extern uschar *dkim_verify_signers; /* Colon-separated list of domains for each of which we call the DKIM ACL */
563 extern uschar *dkim_verify_status; /* result for this signature */
564 extern uschar *dkim_verify_reason; /* result for this signature */
567 extern uschar *dns_again_means_nonexist; /* Domains that are badly set up */
568 extern int dns_csa_search_limit; /* How deep to search for CSA SRV records */
569 extern BOOL dns_csa_use_reverse; /* Check CSA in reverse DNS? (non-standard) */
570 extern int dns_cname_loops; /* Follow CNAMEs returned by resolver to this depth */
571 extern uschar *dns_ipv4_lookup; /* For these domains, don't look for AAAA (or A6) */
573 extern int dns_dane_ok; /* Ok to use DANE when checking TLS authenticity */
575 extern int dns_retrans; /* Retransmission time setting */
576 extern int dns_retry; /* Number of retries */
577 extern int dns_dnssec_ok; /* When constructing DNS query, set DO flag */
578 extern const uschar * dns_rc_names[]; /* Mostly for debug output */
579 extern uschar *dns_trust_aa; /* DNSSEC trust AA as AD */
580 extern int dns_use_edns0; /* Coerce EDNS0 support on/off in resolver. */
581 extern uschar *dnslist_domain; /* DNS (black) list domain */
582 extern uschar *dnslist_matched; /* DNS (black) list matched key */
583 extern uschar *dnslist_text; /* DNS (black) list text message */
584 extern uschar *dnslist_value; /* DNS (black) list IP address */
585 extern tree_node *domainlist_anchor; /* Tree of defined domain lists */
586 extern int domainlist_count; /* Number defined */
588 /* This option is now a no-opt, retained for compatibility */
589 extern BOOL drop_cr; /* For broken local MUAs */
590 extern const uschar *driver_srcfile; /* For debug & errors */
591 extern int driver_srcline; /* For debug & errors */
593 extern unsigned int dtrigger_selector; /* when to start debug */
595 extern uschar *dsn_from; /* From: string for DSNs */
597 extern BOOL envelope_to_remove; /* Remove envelope_to_headers */
598 extern int errno_quota; /* Quota errno in this OS */
599 extern int error_handling; /* Error handling style */
600 extern uschar *errors_copy; /* For taking copies of errors */
601 extern uschar *errors_reply_to; /* Reply-to for error messages */
602 extern int errors_sender_rc; /* Return after message to sender*/
604 #ifndef DISABLE_EVENT
605 extern uschar *event_action; /* expansion for delivery events */
606 extern const uschar *event_data; /* event data */
607 extern int event_defer_errno; /* error number set when a remote delivery is deferred with a host error */
608 extern const uschar *event_name; /* event classification */
611 extern gid_t exim_gid; /* To be used with exim_uid */
612 extern BOOL exim_gid_set; /* TRUE if exim_gid set */
613 extern uschar *exim_path; /* Path to exec exim */
614 extern const uschar *exim_sieve_extension_list[]; /* list of sieve extensions */
615 extern uid_t exim_uid; /* Non-root uid for exim */
616 extern BOOL exim_uid_set; /* TRUE if exim_uid set */
617 extern int expand_level; /* Nesting depth; indent for debug */
618 extern int expand_forbid; /* RDO flags for forbidding things */
619 extern int expand_nlength[]; /* Lengths of numbered strings */
620 extern int expand_nmax; /* Max numerical value */
621 extern const uschar *expand_nstring[]; /* Numbered strings */
622 extern BOOL extract_addresses_remove_arguments; /* Controls -t behaviour */
623 extern uschar *extra_local_interfaces; /* Local, non-listen interfaces */
625 extern int fake_response; /* Fake FAIL or DEFER response to data */
626 extern uschar *fake_response_text; /* User defined message for the above. Default is in globals.c. */
627 extern int filter_n[FILTER_VARIABLE_COUNT]; /* filter variables */
628 extern int filter_sn[FILTER_VARIABLE_COUNT]; /* variables set by system filter */
629 extern int filter_test; /* Filter test type */
630 extern const uschar *filter_test_sfile;/* System filter test file */
631 extern const uschar *filter_test_ufile;/* User filter test file */
632 extern uschar *filter_thisaddress; /* For address looping */
633 extern int finduser_retries; /* Retry count for getpwnam() */
634 extern uid_t fixed_never_users[]; /* Can't be overridden */
635 extern uschar *freeze_tell; /* Message on (some) freezings */
636 extern uschar *freeze_tell_config; /* The configured setting */
637 extern uschar *fudged_queue_times; /* For use in test harness */
639 extern uschar *gecos_name; /* To be expanded when pattern matches */
640 extern uschar *gecos_pattern; /* Pattern to match */
641 extern rewrite_rule *global_rewrite_rules; /* Chain of rewriting rules */
643 extern volatile sig_atomic_t had_command_timeout; /* Alarm sighandler called */
644 extern volatile sig_atomic_t had_command_sigterm; /* TERM sighandler called */
645 extern volatile sig_atomic_t had_data_timeout; /* Alarm sighandler called */
646 extern volatile sig_atomic_t had_data_sigint; /* TERM/INT sighandler called */
647 extern int header_insert_maxlen; /* Max for inserting headers */
648 extern int header_maxsize; /* Max total length for header */
649 extern int header_line_maxsize; /* Max for an individual line */
650 extern header_name header_names[]; /* Table of header names */
651 extern int header_names_size; /* Number of entries */
652 extern uschar *helo_accept_junk_hosts; /* Allowed to use junk arg */
653 extern uschar *helo_allow_chars; /* Rogue chars to allow in HELO/EHLO */
654 extern uschar *helo_lookup_domains; /* If these given, lookup host name */
655 extern uschar *helo_try_verify_hosts; /* Soft check HELO argument for these */
656 extern uschar *helo_verify_hosts; /* Hard check HELO argument for these */
657 extern const uschar *hex_digits; /* Used in several places */
658 extern uschar *hold_domains; /* Hold up deliveries to these */
659 extern uschar *host_data; /* Obtained from lookup in ACL */
660 extern uschar *host_lookup; /* For which IP addresses are always looked up */
661 extern BOOL host_lookup_deferred; /* TRUE if lookup deferred */
662 extern BOOL host_lookup_failed; /* TRUE if lookup failed */
663 extern uschar *host_lookup_order; /* Order of host lookup types */
664 extern uschar *host_lookup_msg; /* Text for why it failed */
665 extern int host_number; /* For sharing spools */
666 extern uschar *host_number_string; /* For expanding */
667 extern uschar *host_reject_connection; /* Reject these hosts */
668 extern uschar *hosts_connection_nolog; /* Limits the logging option */
669 extern uschar *hosts_require_helo; /* check for HELO/EHLO before MAIL */
670 extern uschar *hosts_treat_as_local; /* For routing */
671 #ifdef EXPERIMENTAL_XCLIENT
672 extern uschar *hosts_xclient; /* Allow XCLIENT command for specified hosts */
674 extern tree_node *hostlist_anchor; /* Tree of defined host lists */
675 extern int hostlist_count; /* Number defined */
678 extern int ignore_bounce_errors_after; /* Keep them for this time. */
679 extern BOOL ignore_fromline_local; /* Local SMTP ignore fromline */
680 extern uschar *ignore_fromline_hosts; /* Hosts permitted to send "From " */
681 extern int inetd_wait_timeout; /* Timeout for inetd wait mode */
682 extern uschar *initial_cwd; /* The directory we where in at startup */
683 extern uschar *iterate_item; /* Item from iterate list */
685 extern int journal_fd; /* Fd for journal file */
687 extern uschar *keep_environment; /* Whitelist for environment variables */
688 extern int keep_malformed; /* Time to keep malformed messages */
690 extern uschar *eldap_dn; /* Where LDAP DNs are left */
691 extern const uschar *letter_digit_hyphen_dot; /* Legitimate DNS host name chars */
692 #ifndef DISABLE_ESMTP_LIMITS
693 extern uschar *limits_advertise_hosts; /* for banner/EHLO pipelining */
695 extern int load_average; /* Most recently read load average */
696 extern BOOL local_from_check; /* For adding Sender: (global value) */
697 extern uschar *local_from_prefix; /* Permitted prefixes */
698 extern uschar *local_from_suffix; /* Permitted suffixes */
699 extern uschar *local_interfaces; /* For forcing specific interfaces */
700 #ifdef HAVE_LOCAL_SCAN
701 extern uschar *local_scan_data; /* Text returned by local_scan() */
702 extern optionlist local_scan_options[];/* Option list for local_scan() */
703 extern int local_scan_options_count; /* Size of the list */
704 extern int local_scan_timeout; /* Timeout for local_scan() */
706 extern BOOL local_sender_retain; /* Retain Sender: (with no From: check) */
707 extern gid_t local_user_gid; /* As it says; may be set in routers */
708 extern uid_t local_user_uid; /* As it says; may be set in routers */
709 extern tree_node *localpartlist_anchor;/* Tree of defined localpart lists */
710 extern int localpartlist_count; /* Number defined */
711 extern uschar *log_buffer; /* For constructing log entries */
712 extern int log_default[]; /* Initialization list for log_selector */
713 extern uschar *log_file_path; /* If unset, use default */
714 extern int log_notall[]; /* Log options excluded from +all */
715 extern bit_table log_options[]; /* Table of options */
716 extern int log_options_count; /* Size of table */
717 extern int log_reject_target; /* Target log for ACL rejections */
718 extern unsigned int log_selector[]; /* Bit map of logging options */
719 extern uschar *log_selector_string; /* As supplied in the config */
720 extern FILE *log_stderr; /* Copy of stderr for log use, or NULL */
721 extern BOOL log_timezone; /* TRUE to include the timezone in log lines */
722 extern uschar *login_sender_address; /* The actual sender address */
723 extern tree_node *lookups_tree; /* Tree of available lookups */
724 extern unsigned lookup_list_count; /* Number of entries in the list */
725 extern uschar *lookup_dnssec_authenticated; /* AD status of dns lookup */
726 extern int lookup_open_max; /* Max lookup files to cache */
727 extern uschar *lookup_value; /* Value looked up from file */
729 extern macro_item *macros; /* Configuration macros */
730 extern macro_item *macros_user; /* Non-builtin configuration macros */
731 extern macro_item *mlast; /* Last item in macro list */
732 extern uschar *mailstore_basename; /* For mailstore deliveries */
733 #ifdef WITH_CONTENT_SCAN
734 extern uschar *malware_name; /* Name of virus or malware ("W32/Klez-H") */
736 extern int max_received_linelength;/* What it says */
737 extern int max_username_length; /* For systems with broken getpwnam() */
738 extern int message_age; /* In seconds */
739 extern uschar *message_body; /* Start of message body for filter */
740 extern uschar *message_body_end; /* End of message body for filter */
741 extern BOOL message_body_newlines; /* FALSE => remove newlines */
742 extern int message_body_size; /* Sic */
743 extern int message_body_visible; /* Amount visible in message_body */
744 extern int message_ended; /* State of message reading and how ended */
745 extern uschar *message_headers; /* When built */
746 extern uschar message_id_option[]; /* -E<message-id> for use as option */
747 extern uschar *message_id_external; /* External form of following */
748 extern uschar *message_id_domain; /* Expanded to form domain-part of message_id */
749 extern uschar *message_id_text; /* Expanded to form message_id */
750 extern int message_linecount; /* As it says */
751 extern BOOL message_logs; /* TRUE to write message logs */
752 extern int message_size; /* Size of message */
753 extern uschar *message_size_limit; /* As it says */
755 extern BOOL message_smtputf8; /* Internationalized mail handling */
756 extern int message_utf8_downconvert; /* convert from utf8 */
757 extern const pcre2_code *regex_UTF8; /* For recognizing SMTPUTF8 settings */
759 extern uschar message_subdir[]; /* Subdirectory for messages */
760 extern const uschar *message_reference;/* Reference for error messages */
762 /* MIME ACL expandables */
763 #ifdef WITH_CONTENT_SCAN
764 extern int mime_anomaly_level;
765 extern const uschar *mime_anomaly_text;
766 extern uschar *mime_boundary;
767 extern uschar *mime_charset;
768 extern uschar *mime_content_description;
769 extern uschar *mime_content_disposition;
770 extern uschar *mime_content_id;
771 extern unsigned int mime_content_size;
772 extern uschar *mime_content_transfer_encoding;
773 extern uschar *mime_content_type;
774 extern uschar *mime_decoded_filename;
775 extern uschar *mime_filename;
776 extern int mime_is_multipart;
777 extern int mime_is_coverletter;
778 extern int mime_is_rfc822;
779 extern int mime_part_count;
782 extern BOOL mua_wrapper; /* TRUE when Exim is wrapping an MUA */
784 extern uid_t *never_users; /* List of uids never to be used */
785 extern uschar *notifier_socket; /* Name for daemon notifier unix-socket */
787 extern const int on; /* For setsockopt */
788 extern const int off;
790 extern optionlist optionlist_auths[]; /* These option lists are made */
791 extern int optionlist_auths_size; /* global so that readconf can */
792 extern optionlist optionlist_routers[]; /* see them for printing out */
793 extern int optionlist_routers_size; /* the options. */
794 extern optionlist optionlist_transports[];
795 extern int optionlist_transports_size;
797 extern uid_t original_euid; /* Original effective uid */
798 extern gid_t originator_gid; /* Gid of whoever wrote spool file */
799 extern uschar *originator_login; /* Login of same */
800 extern uschar *originator_name; /* Full name of same */
801 extern uid_t originator_uid; /* Uid of ditto */
802 extern uschar *override_local_interfaces; /* Value of -oX argument */
803 extern const uschar *override_pid_file_path; /* Value of -oP argument */
805 extern BOOL panic_coredump; /* SEGV rather than exit, on LOG_PANIC_DIE */
806 extern pcre2_general_context * pcre_gen_ctx; /* pcre memory management */
807 extern pcre2_compile_context * pcre_gen_cmp_ctx;
808 extern pcre2_match_context * pcre_gen_mtc_ctx;
809 extern pcre2_general_context * pcre_mlc_ctx;
810 extern pcre2_compile_context * pcre_mlc_cmp_ctx;
812 extern uschar *percent_hack_domains; /* Local domains for which '% operates */
813 extern const uschar *pid_file_path; /* For writing daemon pids */
814 #ifndef DISABLE_PIPE_CONNECT
815 extern uschar *pipe_connect_advertise_hosts; /* for banner/EHLO pipelining */
817 extern uschar *pipelining_advertise_hosts; /* As it says */
819 extern BOOL prdr_enable; /* As it says */
820 extern BOOL prdr_requested; /* Connecting mail server wants PRDR */
822 extern BOOL preserve_message_logs; /* Save msglog files */
823 extern uschar *primary_hostname; /* Primary name of this computer */
824 extern BOOL print_topbitchars; /* Topbit chars are printing chars */
825 extern uschar *process_info; /* For SIGUSR1 output */
826 extern int process_info_len;
827 extern uschar *process_log_path; /* Alternate path */
828 extern const uschar *process_purpose; /* for debug output */
829 extern BOOL prod_requires_admin; /* TRUE if prodding requires admin */
831 #if defined(SUPPORT_PROXY) || defined(SUPPORT_SOCKS) || defined(EXPERIMENTAL_XCLIENT)
832 extern uschar *hosts_proxy; /* Hostlist which (require) use proxy protocol */
833 extern uschar *proxy_external_address; /* IP of remote interface of proxy */
834 extern int proxy_external_port; /* Port on remote interface of proxy */
835 extern uschar *proxy_local_address; /* IP of local interface of proxy */
836 extern int proxy_local_port; /* Port on local interface of proxy */
837 extern int proxy_protocol_timeout; /* Timeout for proxy negotiation */
838 extern BOOL proxy_session; /* TRUE if receiving mail from valid proxy
839 or sending via one */
842 extern uschar *prvscheck_address; /* Set during prvscheck expansion item */
843 extern uschar *prvscheck_keynum; /* Set during prvscheck expansion item */
844 extern uschar *prvscheck_result; /* Set during prvscheck expansion item */
846 extern qrunner *qrunners; /* tracking data for queues */
848 extern const uschar *qualify_domain_recipient; /* Domain to qualify recipients with */
849 extern uschar *qualify_domain_sender; /* Domain to qualify senders with */
850 extern uschar *queue_domains; /* Queue these domains */
851 #ifndef DISABLE_QUEUE_RAMP
852 extern BOOL queue_fast_ramp; /* 2-phase queue-run overlap */
854 extern BOOL queue_list_requires_admin; /* TRUE if -bp requires admin */
855 /* immediate children */
856 extern pid_t queue_run_pid; /* PID of the queue running process or 0 */
857 extern int queue_run_pipe; /* Pipe for synchronizing */
858 extern int queue_interval; /* Queue running interval */
859 extern uschar *queue_name; /* Name of queue, if nondefault spooling */
860 extern uschar *queue_name_dest; /* Destination queue, for moving messages */
861 extern BOOL queue_only; /* TRUE to disable immediate delivery */
862 extern int queue_only_load; /* Max load before auto-queue */
863 extern BOOL queue_only_load_latch; /* Latch queue_only_load TRUE */
864 extern uschar *queue_only_file; /* Queue if file exists/not-exists */
865 extern BOOL queue_only_override; /* Allow override from command line */
866 extern BOOL queue_run_in_order; /* As opposed to random */
867 extern uschar *queue_run_max; /* Max queue runners */
868 extern unsigned queue_size; /* items in queue */
869 extern time_t queue_size_next; /* next time to evaluate queue_size */
870 extern uschar *queue_smtp_domains; /* Ditto, for these domains */
872 extern unsigned int random_seed; /* Seed for random numbers */
873 extern tree_node *ratelimiters_cmd; /* Results of command ratelimit checks */
874 extern tree_node *ratelimiters_conn; /* Results of connection ratelimit checks */
875 extern tree_node *ratelimiters_mail; /* Results of per-mail ratelimit checks */
876 extern uschar *raw_active_hostname; /* Pre-expansion */
877 extern const uschar *raw_sender; /* Before rewriting */
878 extern const uschar **raw_recipients; /* Before rewriting */
879 extern int raw_recipients_count;
880 extern const uschar * rc_names[]; /* Mostly for debug output */
881 extern int rcpt_count; /* Count of RCPT commands in a message */
882 extern int rcpt_fail_count; /* Those that got 5xx */
883 extern int rcpt_defer_count; /* Those that got 4xx */
884 extern gid_t real_gid; /* Real gid */
885 extern uid_t real_uid; /* Real user running program */
886 extern int receive_linecount; /* Mainly for BSMTP errors */
887 extern int receive_messagecount; /* Mainly for BSMTP errors */
888 extern int receive_timeout; /* For non-SMTP acceptance */
889 extern int received_count; /* Count of Received: headers */
890 extern const uschar *received_for; /* For "for" field */
891 extern uschar *received_header_text; /* Definition of Received: header */
892 extern int received_headers_max; /* Max count of Received: headers */
893 extern struct timeval received_time; /* Time the message started to be received */
894 extern struct timeval received_time_complete; /* Time the message completed reception */
895 extern uschar *recipient_data; /* lookup data for recipients */
896 extern uschar *recipient_unqualified_hosts; /* Permitted unqualified recipients */
897 extern uschar *recipient_verify_failure; /* What went wrong */
898 extern int recipients_list_max; /* Maximum number fitting in list */
899 extern uschar *recipients_max; /* Max permitted */
900 extern int recipients_max_expanded;
901 extern BOOL recipients_max_reject; /* If TRUE, reject whole message */
902 extern const pcre2_code *regex_AUTH; /* For recognizing AUTH settings */
903 extern const pcre2_code *regex_check_dns_names; /* For DNS name checking */
904 extern const pcre2_code *regex_From; /* For recognizing "From_" lines */
905 extern const pcre2_code *regex_CHUNKING; /* For recognizing CHUNKING (RFC 3030) */
906 extern const pcre2_code *regex_IGNOREQUOTA; /* For recognizing IGNOREQUOTA (LMTP) */
907 #ifndef DISABLE_ESMTP_LIMITS
908 extern const pcre2_code *regex_LIMITS; /* For recognizing LIMITS */
910 extern const pcre2_code *regex_PIPELINING; /* For recognizing PIPELINING */
911 extern const pcre2_code *regex_SIZE; /* For recognizing SIZE settings */
912 #ifndef DISABLE_PIPE_CONNECT
913 extern const pcre2_code *regex_EARLY_PIPE; /* For recognizing PIPE_CONNCT */
915 extern int regex_cachesize; /* number of entries */
916 extern const pcre2_code *regex_ismsgid; /* Compiled r.e. for message ID */
917 extern const pcre2_code *regex_smtp_code; /* For recognizing SMTP codes */
918 #ifdef WHITELIST_D_MACROS
919 extern const pcre2_code *regex_whitelisted_macro; /* For -D macro values */
921 #ifdef WITH_CONTENT_SCAN
922 extern uschar *regex_match_string; /* regex that matched a line (regex ACL condition) */
923 extern const uschar *regex_vars[];
925 extern int remote_delivery_count; /* Number of remote addresses */
926 extern int remote_max_parallel; /* Maximum parallel delivery */
927 extern uschar *remote_sort_domains; /* Remote domain sorting order */
928 extern retry_config *retries; /* Chain of retry config information */
929 extern int retry_data_expire; /* When to expire retry data */
930 extern int retry_interval_max; /* Absolute maximum */
931 extern int retry_maximum_timeout; /* The maximum timeout */
932 extern const uschar *return_path; /* Return path for a message */
933 extern BOOL return_path_remove; /* Remove return-path headers */
934 extern int rewrite_existflags; /* Indicate which headers have rewrites */
935 extern uschar *rfc1413_hosts; /* RFC hosts */
936 extern int rfc1413_query_timeout; /* Timeout on RFC 1413 calls */
937 /* extern BOOL rfc821_domains; */ /* If set, syntax is 821, not 822 => being abolished */
938 extern uid_t root_gid; /* The gid for root */
939 extern uid_t root_uid; /* The uid for root */
940 extern router_info *routers_available; /* List of available router drivers */
941 extern router_instance *routers; /* Chain of instantiated routers */
942 extern router_instance router_defaults;/* Default values */
943 extern const uschar *router_name; /* Name of router last started */
944 extern tree_node *router_var; /* Variables set by router */
945 extern ip_address_item *running_interfaces; /* Host's running interfaces */
946 extern uschar *running_status; /* Flag string for testing */
947 extern int runrc; /* rc from ${run} */
949 extern uschar *search_error_message; /* Details of lookup problem */
950 extern uschar *self_hostname; /* Self host after routing->directors */
951 extern unsigned int sender_address_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for sender */
952 extern uschar *sender_address_data; /* address_data from sender verify */
953 extern const uschar *sender_address_unrewritten; /* Set if rewritten by verify */
954 extern uschar *sender_data; /* lookup result for senders */
955 extern unsigned int sender_domain_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for sender domain */
956 extern uschar *sender_fullhost; /* Sender host name + address */
957 extern BOOL sender_helo_dnssec; /* True if HELO verify used DNS and was DNSSEC */
958 extern uschar *sender_helo_name; /* Host name from HELO/EHLO */
959 extern uschar **sender_host_aliases; /* Points to list of alias names */
960 extern uschar *sender_host_auth_pubname; /* Public-name of authentication method */
961 extern unsigned int sender_host_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for incoming host */
962 extern BOOL sender_host_dnssec; /* true if sender_host_name verified in DNSSEC */
963 extern uschar *sender_ident; /* Sender identity via RFC 1413 */
964 extern uschar *sender_rate; /* Sender rate computed by ACL */
965 extern uschar *sender_rate_limit; /* Configured rate limit */
966 extern uschar *sender_rate_period; /* Configured smoothing period */
967 extern uschar *sender_rcvhost; /* Host data for Received: */
968 extern uschar *sender_unqualified_hosts; /* Permitted unqualified senders */
969 extern uschar *sender_verify_failure; /* What went wrong */
970 extern address_item *sender_verified_list; /* Saved chain of sender verifies */
971 extern address_item *sender_verified_failed; /* The one that caused denial */
972 extern uschar *sending_ip_address; /* Address of outgoing (SMTP) interface */
973 extern int sending_port; /* Port of outgoing interface */
974 extern SIGNAL_BOOL sigalrm_seen; /* Flag for sigalrm_handler */
975 extern const uschar *sigalarm_setter; /* For debug, set to callpoint of alarm() */
976 extern const uschar **sighup_argv; /* Args for re-execing after SIGHUP */
977 extern int slow_lookup_log; /* Log DNS lookups taking longer than N millisecs */
978 extern int smtp_accept_count; /* Count of connections */
979 extern BOOL smtp_accept_keepalive; /* Set keepalive on incoming */
980 extern int smtp_accept_max; /* Max SMTP connections */
981 extern int smtp_accept_max_nonmail;/* Max non-mail commands in one con */
982 extern uschar *smtp_accept_max_nonmail_hosts; /* Limit non-mail cmds from these hosts */
983 extern uschar *smtp_accept_max_per_connection; /* Max msgs per connection */
984 extern uschar *smtp_accept_max_per_host; /* Max SMTP cons from one IP addr */
985 extern int smtp_accept_queue; /* Queue after so many connections */
986 extern int smtp_accept_queue_per_connection; /* Queue after so many msgs */
987 extern int smtp_accept_reserve; /* Reserve these SMTP connections */
988 extern uschar *smtp_active_hostname; /* Hostname for this message */
989 extern int smtp_backlog_monitor; /* listen backlog level to log */
990 extern uschar *smtp_banner; /* Banner string (to be expanded) */
991 extern BOOL smtp_check_spool_space; /* TRUE to check SMTP SIZE value */
992 extern int smtp_ch_index; /* Index in smtp_connection_had */
993 extern uschar *smtp_cmd_argument; /* For all SMTP commands */
994 extern uschar *smtp_cmd_buffer; /* SMTP command buffer */
995 extern struct timeval smtp_connection_start; /* Start time of SMTP connection */
996 extern uschar smtp_connection_had[]; /* Recent SMTP commands */
997 extern int smtp_connect_backlog; /* Max backlog permitted */
998 extern double smtp_delay_mail; /* Current MAIL delay */
999 extern double smtp_delay_rcpt; /* Current RCPT delay */
1000 extern BOOL smtp_enforce_sync; /* Enforce sync rules */
1001 extern uschar *smtp_etrn_command; /* Command to run */
1002 extern BOOL smtp_etrn_serialize; /* Only one at once */
1003 extern FILE *smtp_in; /* Incoming SMTP input file */
1004 extern int smtp_listen_backlog; /* Current listener socket backlog, if monitored */
1005 extern int smtp_load_reserve; /* Only from reserved if load > this */
1006 extern int smtp_mailcmd_count; /* Count of MAIL commands */
1007 extern int smtp_mailcmd_max; /* Limit for MAIL commands */
1008 extern int smtp_max_synprot_errors;/* Max syntax/protocol errors */
1009 extern int smtp_max_unknown_commands; /* As it says */
1010 extern uschar *smtp_names[]; /* decode for command codes */
1011 extern uschar *smtp_notquit_reason; /* Global for disconnect reason */
1012 extern FILE *smtp_out; /* Incoming SMTP output file */
1013 extern uschar *smtp_ratelimit_hosts; /* Rate limit these hosts */
1014 extern uschar *smtp_ratelimit_mail; /* Parameters for MAIL limiting */
1015 extern uschar *smtp_ratelimit_rcpt; /* Parameters for RCPT limiting */
1016 extern uschar *smtp_read_error; /* Message for SMTP input error */
1017 extern int smtp_receive_timeout; /* Applies to each received line */
1018 extern uschar *smtp_receive_timeout_s; /* ... expandable version */
1019 extern uschar *smtp_reserve_hosts; /* Hosts for reserved slots */
1020 extern BOOL smtp_return_error_details; /* TRUE to return full info */
1021 extern int smtp_rlm_base; /* Base interval for MAIL rate limit */
1022 extern double smtp_rlm_factor; /* Factor for MAIL rate limit */
1023 extern int smtp_rlm_limit; /* Max delay */
1024 extern int smtp_rlm_threshold; /* Threshold for RCPT rate limit */
1025 extern int smtp_rlr_base; /* Base interval for RCPT rate limit */
1026 extern double smtp_rlr_factor; /* Factor for RCPT rate limit */
1027 extern int smtp_rlr_limit; /* Max delay */
1028 extern int smtp_rlr_threshold; /* Threshold for RCPT rate limit */
1029 extern unsigned smtp_peer_options; /* Global flags for passed connections */
1030 extern unsigned smtp_peer_options_wrap; /* stacked version hidden by TLS */
1032 extern uschar *smtputf8_advertise_hosts; /* ingress control */
1035 #ifdef WITH_CONTENT_SCAN
1036 extern uschar *spamd_address; /* address for the spamassassin daemon */
1037 extern uschar *spam_bar; /* the spam "bar" (textual representation of spam_score) */
1038 extern uschar *spam_report; /* the spamd report (multiline) */
1039 extern uschar *spam_action; /* the spamd recommended-action */
1040 extern uschar *spam_score; /* the spam score (float) */
1041 extern uschar *spam_score_int; /* spam_score * 10 (int) */
1043 extern BOOL split_spool_directory; /* TRUE to use multiple subdirs */
1044 extern FILE *spool_data_file; /* handle for -D file */
1045 extern uschar *spool_directory; /* Name of spool directory */
1046 extern BOOL spool_wireformat; /* can write wireformat -D files */
1048 extern uschar *srs_recipient; /* SRS recipient */
1050 extern BOOL strict_acl_vars; /* ACL variables have to be set before being used */
1051 extern int string_datestamp_offset;/* After insertion by string_format */
1052 extern int string_datestamp_length;/* After insertion by string_format */
1053 extern int string_datestamp_type; /* After insertion by string_format */
1054 extern BOOL strip_excess_angle_brackets; /* Surrounding route-addrs */
1055 extern BOOL strip_trailing_dot; /* Remove dots at ends of domains */
1056 extern const uschar *submission_domain;/* Domain for submission mode */
1057 extern const uschar *submission_name; /* User name set from ACL */
1058 extern BOOL syslog_duplication; /* FALSE => no duplicate logging */
1059 extern int syslog_facility; /* As defined by Syslog.h */
1060 extern BOOL syslog_pid; /* TRUE if PID on syslogs */
1061 extern const uschar *syslog_processname; /* 'ident' param to openlog() */
1062 extern BOOL syslog_timestamp; /* TRUE if time on syslogs */
1063 extern uschar *system_filter; /* Name of system filter file */
1065 extern uschar *system_filter_directory_transport; /* Transports for the */
1066 extern uschar *system_filter_file_transport; /* system filter */
1067 extern uschar *system_filter_pipe_transport;
1068 extern uschar *system_filter_reply_transport;
1070 extern gid_t system_filter_gid; /* Gid for running system filter */
1071 extern BOOL system_filter_gid_set; /* TRUE if gid set */
1072 extern uid_t system_filter_uid; /* Uid for running system filter */
1073 extern BOOL system_filter_uid_set; /* TRUE if uid set */
1075 extern blob tcp_fastopen_nodata; /* for zero-data TFO connect requests */
1076 extern BOOL tcp_nodelay; /* Controls TCP_NODELAY on daemon */
1077 extern tfo_state_t tcp_out_fastopen; /* TCP fast open */
1078 #ifdef USE_TCP_WRAPPERS
1079 extern uschar *tcp_wrappers_daemon_name; /* tcpwrappers daemon lookup name */
1081 extern int test_harness_load_avg; /* For use when testing */
1082 extern int thismessage_size_limit; /* Limit for this message */
1083 extern int timeout_frozen_after; /* Max time to keep frozen messages */
1084 #ifdef MEASURE_TIMING
1085 extern struct timeval timestamp_startup; /* For development measurements */
1088 extern const uschar *transport_name; /* Name of transport last started */
1089 extern int transport_count; /* Count of bytes transported */
1090 extern int transport_newlines; /* Accurate count of number of newline chars transported */
1091 extern const uschar **transport_filter_argv; /* For on-the-fly filtering */
1092 extern int transport_filter_timeout; /* Timeout for same */
1094 extern transport_info * transports_available; /* Listof available transports */
1095 extern transport_instance *transports; /* Chain of instantiated transports */
1096 extern transport_instance transport_defaults; /* Default values */
1098 extern int transport_write_timeout;/* Set to time out individual writes */
1100 extern tree_node *tree_dns_fails; /* Tree of DNS lookup failures */
1101 extern tree_node *tree_duplicates; /* Tree of duplicate addresses */
1102 extern tree_node *tree_nonrecipients; /* Tree of nonrecipient addresses */
1103 extern tree_node *tree_unusable; /* Tree of unusable addresses */
1105 extern gid_t *trusted_groups; /* List of trusted groups */
1106 extern uid_t *trusted_users; /* List of trusted users */
1107 extern uschar *timezone_string; /* Required timezone setting */
1109 extern uschar *unknown_login; /* To use when login id unknown */
1110 extern uschar *unknown_username; /* Ditto */
1111 extern uschar *untrusted_set_sender; /* Let untrusted users set these senders */
1112 extern uschar *uucp_from_pattern; /* For recognizing "From " lines */
1113 extern uschar *uucp_from_sender; /* For building the sender */
1115 extern uschar *warn_message_file; /* Template for warning messages */
1116 extern const uschar *warnmsg_delay; /* String form of delay time */
1117 extern const uschar *warnmsg_recipients; /* Recipients of warning message */
1118 extern BOOL write_rejectlog; /* Control of reject logging */
1120 extern uschar *verify_mode; /* Running a router in verify mode */
1121 extern uschar *version_copyright; /* Copyright notice */
1122 extern uschar *version_date; /* Date of compilation */
1123 extern uschar *version_cnumber; /* Compile number */
1124 extern uschar *version_string; /* Version string */
1126 extern int warning_count; /* Delay warnings sent for this msg */
1128 #ifndef DISABLE_WELLKNOWN
1129 extern uschar *wellknown_advertise_hosts;/* Allow WELLKNOWN command for specified hosts */
1130 extern uschar *wellknown_response; /* SMTP response for WELLKNOWN verb */
1133 /* End of globals.h */
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