1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) The Exim Maintainers 2020 - 2022 */
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 const extern 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 extern tree_node *acl_var_c; /* ACL connection variables */
346 extern tree_node *acl_var_m; /* ACL message variables */
347 extern uschar *acl_verify_message; /* User message for verify failure */
348 extern string_item *acl_warn_logged; /* Logged lines */
349 extern uschar *acl_wherecodes[]; /* Response codes for ACL fails */
350 extern uschar *acl_wherenames[]; /* Names for messages */
351 extern address_item *addr_duplicate; /* Duplicate address list */
352 extern address_item address_defaults; /* Default data for address item */
353 extern uschar *address_file; /* Name of file when delivering to one */
354 extern uschar *address_pipe; /* Pipe command when delivering to one */
355 extern tree_node *addresslist_anchor; /* Tree of defined address lists */
356 extern int addresslist_count; /* Number defined */
357 extern gid_t *admin_groups; /* List of admin groups */
358 extern BOOL allow_domain_literals; /* As it says */
359 extern BOOL allow_mx_to_ip; /* Allow MX records to -> ip address */
360 #ifdef EXPERIMENTAL_ARC
361 extern struct arc_set *arc_received; /* highest ARC instance evaluation struct */
362 extern int arc_received_instance; /* highest ARC instance number in headers */
363 extern int arc_oldest_pass; /* lowest passing instance number in headers */
364 extern const uschar *arc_state; /* verification state */
365 extern const uschar *arc_state_reason;
367 extern BOOL allow_utf8_domains; /* For experimenting */
368 extern uschar *authenticated_fail_id; /* ID that failed authentication */
369 extern uschar *authenticated_id; /* ID that was authenticated */
370 extern uschar *authenticated_sender; /* From AUTH on MAIL */
371 extern BOOL authentication_failed; /* TRUE if AUTH was tried and failed */
372 extern uschar *authenticator_name; /* for debug and error messages */
373 extern uschar *auth_advertise_hosts; /* Only advertise to these */
374 extern auth_info auths_available[]; /* Vector of available auth mechanisms */
375 extern auth_instance *auths; /* Chain of instantiated auths */
376 extern auth_instance auth_defaults; /* Default values */
377 extern uschar *auth_defer_msg; /* Error message for log */
378 extern uschar *auth_defer_user_msg; /* Error message for user */
379 extern const uschar *auth_vars[]; /* $authn variables */
380 extern int auto_thaw; /* Auto-thaw interval */
381 #ifdef WITH_CONTENT_SCAN
382 extern int av_failed; /* TRUE if the AV process failed */
383 extern uschar *av_scanner; /* AntiVirus scanner to use for the malware condition */
386 extern uschar *base62_chars; /* Table of base-62 characters */
387 extern uschar *bi_command; /* Command for -bi option */
388 extern uschar *big_buffer; /* Used for various temp things */
389 extern int big_buffer_size; /* Current size (can expand) */
390 #ifdef EXPERIMENTAL_BRIGHTMAIL
391 extern uschar *bmi_alt_location; /* expansion variable that contains the alternate location for the rcpt (available during routing) */
392 extern uschar *bmi_base64_tracker_verdict; /* expansion variable with base-64 encoded OLD verdict string (available during routing) */
393 extern uschar *bmi_base64_verdict; /* expansion variable with base-64 encoded verdict string (available during routing) */
394 extern uschar *bmi_config_file; /* Brightmail config file */
395 extern int bmi_deliver; /* Flag that determines if the message should be delivered to the rcpt (available during routing) */
396 extern int bmi_run; /* Flag that determines if message should be run through Brightmail server */
397 extern uschar *bmi_verdicts; /* BASE64-encoded verdicts with recipient lists */
399 extern int bsmtp_transaction_linecount; /* Start of last transaction */
400 extern int body_8bitmime; /* sender declared BODY= ; 7=7BIT, 8=8BITMIME */
401 extern uschar *bounce_message_file; /* Template file */
402 extern uschar *bounce_message_text; /* One-liner */
403 extern uschar *bounce_recipient; /* When writing an errmsg */
404 extern BOOL bounce_return_body; /* Include body in returned message */
405 extern int bounce_return_linesize_limit; /* Max line length in return */
406 extern BOOL bounce_return_message; /* Include message in bounce */
407 extern int bounce_return_size_limit; /* Max amount to return */
408 extern uschar *bounce_sender_authentication; /* AUTH address for bounces */
410 extern uschar *callout_address; /* Address used for a malware/spamd/verify etc. callout */
411 extern int callout_cache_domain_positive_expire; /* Time for positive domain callout cache records to expire */
412 extern int callout_cache_domain_negative_expire; /* Time for negative domain callout cache records to expire */
413 extern int callout_cache_positive_expire; /* Time for positive callout cache records to expire */
414 extern int callout_cache_negative_expire; /* Time for negative callout cache records to expire */
415 extern uschar *callout_random_local_part; /* Local part to be used to check if server called will accept any local part */
416 extern uschar *check_dns_names_pattern;/* Regex for syntax check */
417 extern int check_log_inodes; /* Minimum for message acceptance */
418 extern int_eximarith_t check_log_space; /* Minimum for message acceptance */
419 extern BOOL check_rfc2047_length; /* Check RFC 2047 encoded string length */
420 extern int check_spool_inodes; /* Minimum for message acceptance */
421 extern int_eximarith_t check_spool_space; /* Minimum for message acceptance */
422 extern uschar *chunking_advertise_hosts; /* RFC 3030 CHUNKING */
423 extern unsigned chunking_datasize;
424 extern unsigned chunking_data_left;
425 extern chunking_state_t chunking_state;
426 extern uschar *client_authenticator; /* Authenticator name used for smtp delivery */
427 extern uschar *client_authenticated_id; /* "login" name used for SMTP AUTH */
428 extern uschar *client_authenticated_sender; /* AUTH option to SMTP MAIL FROM (not yet used) */
429 #ifndef DISABLE_CLIENT_CMD_LOG
430 extern gstring *client_cmd_log; /* debug log of client cmds & responses */
432 extern int clmacro_count; /* Number of command line macros */
433 extern uschar *clmacros[]; /* Copy of them, for re-exec */
434 extern BOOL commandline_checks_require_admin; /* belt and braces for insecure setups */
435 extern ulong connection_id; /* per-daemon connection number */
436 extern int connection_max_messages;/* Max down one SMTP connection */
437 extern FILE *config_file; /* Configuration file */
438 extern const uschar *config_filename; /* Configuration file name */
439 extern gid_t config_gid; /* Additional group owner */
440 extern int config_lineno; /* Line number */
441 extern uschar *config_main_filelist; /* List of possible config files */
442 extern uschar *config_main_filename; /* File name actually used */
443 extern uschar *config_main_directory; /* Directory where the main config file was found */
444 extern uid_t config_uid; /* Additional owner */
445 extern uschar *continue_proxy_cipher; /* TLS cipher for proxied continued delivery */
446 extern BOOL continue_proxy_dane; /* proxied conn is DANE */
447 extern uschar *continue_proxy_sni; /* proxied conn SNI */
448 extern uschar *continue_hostname; /* Host for continued delivery */
449 extern uschar *continue_host_address; /* IP address for ditto */
450 extern int continue_sequence; /* Sequence num for continued delivery */
451 extern uschar *continue_transport; /* Transport for continued delivery */
452 #ifdef EXPERIMENTAL_ESMTP_LIMITS
453 extern unsigned continue_limit_mail; /* Peer advertised limit */
454 extern unsigned continue_limit_rcpt;
455 extern unsigned continue_limit_rcptdom;
459 extern uschar *csa_status; /* Client SMTP Authorization result */
462 unsigned callout_hold_only:1; /* Conn is only for verify callout */
463 unsigned delivery:1; /* When to attempt */
464 unsigned defer_pass:1; /* Pass 4xx to caller rather than spooling */
465 unsigned is_tls:1; /* Conn has TLS active */
466 client_conn_ctx cctx; /* Open connection */
467 int nrcpt; /* Count of addresses */
468 uschar * transport; /* Name of transport */
469 uschar * interface; /* (address of) */
470 uschar * snd_ip; /* sending_ip_address */
471 int snd_port; /* sending_port */
472 unsigned peer_options; /* smtp_peer_options */
473 host_item host; /* Host used */
474 address_item addr; /* (Chain of) addresses */
476 extern cut_t cutthrough; /* Deliver-concurrently */
478 extern int daemon_notifier_fd; /* Unix socket for notifications */
479 extern uschar *daemon_smtp_port; /* Can be a list of ports */
480 extern int daemon_startup_retries; /* Number of times to retry */
481 extern int daemon_startup_sleep; /* Sleep between retries */
483 #ifdef EXPERIMENTAL_DCC
484 extern BOOL dcc_direct_add_header; /* directly add header */
485 extern uschar *dcc_header; /* dcc header */
486 extern uschar *dcc_result; /* dcc result */
487 extern uschar *dccifd_address; /* address of the dccifd daemon */
488 extern uschar *dccifd_options; /* options for the dccifd daemon */
491 extern int debug_fd; /* The fd for debug_file */
492 extern FILE *debug_file; /* Where to write debugging info */
493 extern int debug_notall[]; /* Debug options excluded from +all */
494 extern bit_table debug_options[]; /* Table of debug options */
495 extern int debug_options_count; /* Size of table */
496 extern unsigned debug_pretrigger_bsize;
497 extern uschar *debug_pretrigger_buf; /* circular buffer for precapture */
498 extern BOOL debug_store; /* Do extra checks on store_reset */
499 extern uschar debuglog_name[LOG_NAME_SIZE]; /* ACL-init debug */
501 extern int delay_warning[]; /* Times between warnings */
502 extern uschar *delay_warning_condition; /* Condition string for warnings */
503 extern BOOL delivery_date_remove; /* Remove delivery-date headers */
505 extern uschar *deliver_address_data; /* Arbitrary data for an address */
506 extern int deliver_datafile; /* FD for data part of message */
507 extern const uschar *deliver_domain; /* The local domain for delivery */
508 extern uschar *deliver_domain_data; /* From domain lookup */
509 extern const uschar *deliver_domain_orig; /* The original local domain for delivery */
510 extern const uschar *deliver_domain_parent; /* The parent domain for delivery */
511 extern BOOL deliver_drop_privilege; /* TRUE for unprivileged delivery */
512 extern time_t deliver_frozen_at; /* Time of freezing */
513 extern uschar *deliver_home; /* Home directory for pipes */
514 extern const uschar *deliver_host; /* (First) host for routed local deliveries */
515 /* Remote host for filter */
516 extern const uschar *deliver_host_address; /* Address for remote delivery filter */
517 extern int deliver_host_port; /* Address for remote delivery filter */
518 extern uschar *deliver_in_buffer; /* Buffer for copying file */
519 extern ino_t deliver_inode; /* Inode for appendfile */
520 extern uschar *deliver_localpart; /* The local part for delivery */
521 extern uschar *deliver_localpart_data; /* From local part lookup (de-tainted) */
522 extern uschar *deliver_localpart_orig; /* The original local part for delivery */
523 extern uschar *deliver_localpart_parent; /* The parent local part for delivery */
524 extern uschar *deliver_localpart_prefix; /* The stripped prefix, if any */
525 extern uschar *deliver_localpart_prefix_v; /* The stripped-prefix variable portion, if any */
526 extern uschar *deliver_localpart_suffix; /* The stripped suffix, if any */
527 extern uschar *deliver_localpart_suffix_v; /* The stripped-suffix variable portion, if any */
528 extern uschar *deliver_out_buffer; /* Buffer for copying file */
529 extern int deliver_queue_load_max; /* Different value for queue running */
530 extern address_item *deliver_recipients; /* Current set of addresses */
531 extern uschar *deliver_selectstring; /* For selecting by recipient */
532 extern uschar *deliver_selectstring_sender; /* For selecting by sender */
533 #ifdef ENABLE_DISABLE_FSYNC
534 extern BOOL disable_fsync; /* Not for normal use */
536 extern BOOL disable_ipv6; /* Don't do any IPv6 things */
539 extern unsigned dkim_collect_input; /* Runtime count of dkim signtures; tracks whether SMTP input is fed to DKIM validation */
540 extern uschar *dkim_cur_signer; /* Expansion variable, holds the current "signer" domain or identity during a acl_smtp_dkim run */
541 extern int dkim_key_length; /* Expansion variable, length of signing key in bits */
542 extern void *dkim_signatures; /* Actually a (pdkim_signature *) but most files do not need to know */
543 extern uschar *dkim_signers; /* Expansion variable, holds colon-separated list of domains and identities that have signed a message */
544 extern uschar *dkim_signing_domain; /* Expansion variable, domain used for signing a message. */
545 extern uschar *dkim_signing_selector; /* Expansion variable, selector used for signing a message. */
546 extern uschar *dkim_verify_hashes; /* Preference order for signatures */
547 extern uschar *dkim_verify_keytypes; /* Preference order for signatures */
548 extern uschar *dkim_verify_min_keysizes; /* list of minimum key sizes, keyed by algo */
549 extern BOOL dkim_verify_minimal; /* Shortcircuit signature verification */
550 extern uschar *dkim_verify_overall; /* First successful domain verified, or null */
551 extern uschar *dkim_verify_signers; /* Colon-separated list of domains for each of which we call the DKIM ACL */
552 extern uschar *dkim_verify_status; /* result for this signature */
553 extern uschar *dkim_verify_reason; /* result for this signature */
556 extern uschar *dmarc_domain_policy; /* Expansion for declared policy of used domain */
557 extern uschar *dmarc_forensic_sender; /* Set sender address for forensic reports */
558 extern uschar *dmarc_history_file; /* Expansion variable, file to store dmarc results */
559 extern uschar *dmarc_status; /* Expansion variable, one word value */
560 extern uschar *dmarc_status_text; /* Expansion variable, human readable value */
561 extern uschar *dmarc_tld_file; /* Mozilla TLDs text file */
562 extern uschar *dmarc_used_domain; /* Expansion variable, domain libopendmarc chose for DMARC policy lookup */
565 extern uschar *dns_again_means_nonexist; /* Domains that are badly set up */
566 extern int dns_csa_search_limit; /* How deep to search for CSA SRV records */
567 extern BOOL dns_csa_use_reverse; /* Check CSA in reverse DNS? (non-standard) */
568 extern int dns_cname_loops; /* Follow CNAMEs returned by resolver to this depth */
569 extern uschar *dns_ipv4_lookup; /* For these domains, don't look for AAAA (or A6) */
571 extern int dns_dane_ok; /* Ok to use DANE when checking TLS authenticity */
573 extern int dns_retrans; /* Retransmission time setting */
574 extern int dns_retry; /* Number of retries */
575 extern int dns_dnssec_ok; /* When constructing DNS query, set DO flag */
576 extern const uschar * dns_rc_names[]; /* Mostly for debug output */
577 extern uschar *dns_trust_aa; /* DNSSEC trust AA as AD */
578 extern int dns_use_edns0; /* Coerce EDNS0 support on/off in resolver. */
579 extern uschar *dnslist_domain; /* DNS (black) list domain */
580 extern uschar *dnslist_matched; /* DNS (black) list matched key */
581 extern uschar *dnslist_text; /* DNS (black) list text message */
582 extern uschar *dnslist_value; /* DNS (black) list IP address */
583 extern tree_node *domainlist_anchor; /* Tree of defined domain lists */
584 extern int domainlist_count; /* Number defined */
586 /* This option is now a no-opt, retained for compatibility */
587 extern BOOL drop_cr; /* For broken local MUAs */
588 extern const uschar *driver_srcfile; /* For debug & errors */
589 extern int driver_srcline; /* For debug & errors */
591 extern unsigned int dtrigger_selector; /* when to start debug */
593 extern uschar *dsn_from; /* From: string for DSNs */
595 extern BOOL envelope_to_remove; /* Remove envelope_to_headers */
596 extern int errno_quota; /* Quota errno in this OS */
597 extern int error_handling; /* Error handling style */
598 extern uschar *errors_copy; /* For taking copies of errors */
599 extern uschar *errors_reply_to; /* Reply-to for error messages */
600 extern int errors_sender_rc; /* Return after message to sender*/
602 #ifndef DISABLE_EVENT
603 extern uschar *event_action; /* expansion for delivery events */
604 extern uschar *event_data; /* event data */
605 extern int event_defer_errno; /* error number set when a remote delivery is deferred with a host error */
606 extern const uschar *event_name; /* event classification */
609 extern gid_t exim_gid; /* To be used with exim_uid */
610 extern BOOL exim_gid_set; /* TRUE if exim_gid set */
611 extern uschar *exim_path; /* Path to exec exim */
612 extern const uschar *exim_sieve_extension_list[]; /* list of sieve extensions */
613 extern uid_t exim_uid; /* Non-root uid for exim */
614 extern BOOL exim_uid_set; /* TRUE if exim_uid set */
615 extern int expand_level; /* Nesting depth; indent for debug */
616 extern int expand_forbid; /* RDO flags for forbidding things */
617 extern int expand_nlength[]; /* Lengths of numbered strings */
618 extern int expand_nmax; /* Max numerical value */
619 extern const uschar *expand_nstring[]; /* Numbered strings */
620 extern BOOL extract_addresses_remove_arguments; /* Controls -t behaviour */
621 extern uschar *extra_local_interfaces; /* Local, non-listen interfaces */
623 extern int fake_response; /* Fake FAIL or DEFER response to data */
624 extern uschar *fake_response_text; /* User defined message for the above. Default is in globals.c. */
625 extern int filter_n[FILTER_VARIABLE_COUNT]; /* filter variables */
626 extern int filter_sn[FILTER_VARIABLE_COUNT]; /* variables set by system filter */
627 extern int filter_test; /* Filter test type */
628 extern uschar *filter_test_sfile; /* System filter test file */
629 extern uschar *filter_test_ufile; /* User filter test file */
630 extern uschar *filter_thisaddress; /* For address looping */
631 extern int finduser_retries; /* Retry count for getpwnam() */
632 extern uid_t fixed_never_users[]; /* Can't be overridden */
633 extern uschar *freeze_tell; /* Message on (some) freezings */
634 extern uschar *freeze_tell_config; /* The configured setting */
635 extern uschar *fudged_queue_times; /* For use in test harness */
637 extern uschar *gecos_name; /* To be expanded when pattern matches */
638 extern uschar *gecos_pattern; /* Pattern to match */
639 extern rewrite_rule *global_rewrite_rules; /* Chain of rewriting rules */
641 extern volatile sig_atomic_t had_command_timeout; /* Alarm sighandler called */
642 extern volatile sig_atomic_t had_command_sigterm; /* TERM sighandler called */
643 extern volatile sig_atomic_t had_data_timeout; /* Alarm sighandler called */
644 extern volatile sig_atomic_t had_data_sigint; /* TERM/INT sighandler called */
645 extern int header_insert_maxlen; /* Max for inserting headers */
646 extern int header_maxsize; /* Max total length for header */
647 extern int header_line_maxsize; /* Max for an individual line */
648 extern header_name header_names[]; /* Table of header names */
649 extern int header_names_size; /* Number of entries */
650 extern uschar *helo_accept_junk_hosts; /* Allowed to use junk arg */
651 extern uschar *helo_allow_chars; /* Rogue chars to allow in HELO/EHLO */
652 extern uschar *helo_lookup_domains; /* If these given, lookup host name */
653 extern uschar *helo_try_verify_hosts; /* Soft check HELO argument for these */
654 extern uschar *helo_verify_hosts; /* Hard check HELO argument for these */
655 extern const uschar *hex_digits; /* Used in several places */
656 extern uschar *hold_domains; /* Hold up deliveries to these */
657 extern uschar *host_data; /* Obtained from lookup in ACL */
658 extern uschar *host_lookup; /* For which IP addresses are always looked up */
659 extern BOOL host_lookup_deferred; /* TRUE if lookup deferred */
660 extern BOOL host_lookup_failed; /* TRUE if lookup failed */
661 extern uschar *host_lookup_order; /* Order of host lookup types */
662 extern uschar *host_lookup_msg; /* Text for why it failed */
663 extern int host_number; /* For sharing spools */
664 extern uschar *host_number_string; /* For expanding */
665 extern uschar *host_reject_connection; /* Reject these hosts */
666 extern uschar *hosts_connection_nolog; /* Limits the logging option */
667 extern uschar *hosts_require_helo; /* check for HELO/EHLO before MAIL */
668 extern uschar *hosts_treat_as_local; /* For routing */
669 #ifdef EXPERIMENTAL_XCLIENT
670 extern uschar *hosts_xclient; /* Allow XCLIENT command for specified hosts */
672 extern tree_node *hostlist_anchor; /* Tree of defined host lists */
673 extern int hostlist_count; /* Number defined */
676 extern int ignore_bounce_errors_after; /* Keep them for this time. */
677 extern BOOL ignore_fromline_local; /* Local SMTP ignore fromline */
678 extern uschar *ignore_fromline_hosts; /* Hosts permitted to send "From " */
679 extern int inetd_wait_timeout; /* Timeout for inetd wait mode */
680 extern uschar *initial_cwd; /* The directory we where in at startup */
681 extern uschar *iterate_item; /* Item from iterate list */
683 extern int journal_fd; /* Fd for journal file */
685 extern uschar *keep_environment; /* Whitelist for environment variables */
686 extern int keep_malformed; /* Time to keep malformed messages */
688 extern uschar *eldap_dn; /* Where LDAP DNs are left */
689 extern const uschar *letter_digit_hyphen_dot; /* Legitimate DNS host name chars */
690 #ifdef EXPERIMENTAL_ESMTP_LIMITS
691 extern uschar *limits_advertise_hosts; /* for banner/EHLO pipelining */
693 extern int load_average; /* Most recently read load average */
694 extern BOOL local_from_check; /* For adding Sender: (global value) */
695 extern uschar *local_from_prefix; /* Permitted prefixes */
696 extern uschar *local_from_suffix; /* Permitted suffixes */
697 extern uschar *local_interfaces; /* For forcing specific interfaces */
698 #ifdef HAVE_LOCAL_SCAN
699 extern uschar *local_scan_data; /* Text returned by local_scan() */
700 extern optionlist local_scan_options[];/* Option list for local_scan() */
701 extern int local_scan_options_count; /* Size of the list */
702 extern int local_scan_timeout; /* Timeout for local_scan() */
704 extern BOOL local_sender_retain; /* Retain Sender: (with no From: check) */
705 extern gid_t local_user_gid; /* As it says; may be set in routers */
706 extern uid_t local_user_uid; /* As it says; may be set in routers */
707 extern tree_node *localpartlist_anchor;/* Tree of defined localpart lists */
708 extern int localpartlist_count; /* Number defined */
709 extern uschar *log_buffer; /* For constructing log entries */
710 extern int log_default[]; /* Initialization list for log_selector */
711 extern uschar *log_file_path; /* If unset, use default */
712 extern int log_notall[]; /* Log options excluded from +all */
713 extern bit_table log_options[]; /* Table of options */
714 extern int log_options_count; /* Size of table */
715 extern int log_reject_target; /* Target log for ACL rejections */
716 extern unsigned int log_selector[]; /* Bit map of logging options */
717 extern uschar *log_selector_string; /* As supplied in the config */
718 extern FILE *log_stderr; /* Copy of stderr for log use, or NULL */
719 extern BOOL log_timezone; /* TRUE to include the timezone in log lines */
720 extern uschar *login_sender_address; /* The actual sender address */
721 extern lookup_info **lookup_list; /* Array of pointers to available lookups */
722 extern int lookup_list_count; /* Number of entries in the list */
723 extern uschar *lookup_dnssec_authenticated; /* AD status of dns lookup */
724 extern int lookup_open_max; /* Max lookup files to cache */
725 extern uschar *lookup_value; /* Value looked up from file */
727 extern macro_item *macros; /* Configuration macros */
728 extern macro_item *macros_user; /* Non-builtin configuration macros */
729 extern macro_item *mlast; /* Last item in macro list */
730 extern uschar *mailstore_basename; /* For mailstore deliveries */
731 #ifdef WITH_CONTENT_SCAN
732 extern uschar *malware_name; /* Name of virus or malware ("W32/Klez-H") */
734 extern int max_received_linelength;/* What it says */
735 extern int max_username_length; /* For systems with broken getpwnam() */
736 extern int message_age; /* In seconds */
737 extern uschar *message_body; /* Start of message body for filter */
738 extern uschar *message_body_end; /* End of message body for filter */
739 extern BOOL message_body_newlines; /* FALSE => remove newlines */
740 extern int message_body_size; /* Sic */
741 extern int message_body_visible; /* Amount visible in message_body */
742 extern int message_ended; /* State of message reading and how ended */
743 extern uschar *message_headers; /* When built */
744 extern uschar message_id_option[]; /* -E<message-id> for use as option */
745 extern uschar *message_id_external; /* External form of following */
746 extern uschar *message_id_domain; /* Expanded to form domain-part of message_id */
747 extern uschar *message_id_text; /* Expanded to form message_id */
748 extern int message_linecount; /* As it says */
749 extern BOOL message_logs; /* TRUE to write message logs */
750 extern int message_size; /* Size of message */
751 extern uschar *message_size_limit; /* As it says */
753 extern BOOL message_smtputf8; /* Internationalized mail handling */
754 extern int message_utf8_downconvert; /* convert from utf8 */
755 const extern pcre2_code *regex_UTF8; /* For recognizing SMTPUTF8 settings */
757 extern uschar message_subdir[]; /* Subdirectory for messages */
758 extern uschar *message_reference; /* Reference for error messages */
760 /* MIME ACL expandables */
761 #ifdef WITH_CONTENT_SCAN
762 extern int mime_anomaly_level;
763 extern const uschar *mime_anomaly_text;
764 extern uschar *mime_boundary;
765 extern uschar *mime_charset;
766 extern uschar *mime_content_description;
767 extern uschar *mime_content_disposition;
768 extern uschar *mime_content_id;
769 extern unsigned int mime_content_size;
770 extern uschar *mime_content_transfer_encoding;
771 extern uschar *mime_content_type;
772 extern uschar *mime_decoded_filename;
773 extern uschar *mime_filename;
774 extern int mime_is_multipart;
775 extern int mime_is_coverletter;
776 extern int mime_is_rfc822;
777 extern int mime_part_count;
780 extern BOOL mua_wrapper; /* TRUE when Exim is wrapping an MUA */
782 extern uid_t *never_users; /* List of uids never to be used */
783 extern uschar *notifier_socket; /* Name for daemon notifier unix-socket */
785 extern const int on; /* For setsockopt */
786 extern const int off;
788 extern optionlist optionlist_auths[]; /* These option lists are made */
789 extern int optionlist_auths_size; /* global so that readconf can */
790 extern optionlist optionlist_routers[]; /* see them for printing out */
791 extern int optionlist_routers_size; /* the options. */
792 extern optionlist optionlist_transports[];
793 extern int optionlist_transports_size;
795 extern uid_t original_euid; /* Original effective uid */
796 extern gid_t originator_gid; /* Gid of whoever wrote spool file */
797 extern uschar *originator_login; /* Login of same */
798 extern uschar *originator_name; /* Full name of same */
799 extern uid_t originator_uid; /* Uid of ditto */
800 extern uschar *override_local_interfaces; /* Value of -oX argument */
801 extern uschar *override_pid_file_path; /* Value of -oP argument */
803 extern BOOL panic_coredump; /* SEGV rather than exit, on LOG_PANIC_DIE */
804 extern pcre2_general_context * pcre_gen_ctx; /* pcre memory management */
805 extern pcre2_compile_context * pcre_gen_cmp_ctx;
806 extern pcre2_match_context * pcre_gen_mtc_ctx;
807 extern pcre2_general_context * pcre_mlc_ctx;
808 extern pcre2_compile_context * pcre_mlc_cmp_ctx;
810 extern uschar *percent_hack_domains; /* Local domains for which '% operates */
811 extern uschar *pid_file_path; /* For writing daemon pids */
812 #ifndef DISABLE_PIPE_CONNECT
813 extern uschar *pipe_connect_advertise_hosts; /* for banner/EHLO pipelining */
815 extern uschar *pipelining_advertise_hosts; /* As it says */
817 extern BOOL prdr_enable; /* As it says */
818 extern BOOL prdr_requested; /* Connecting mail server wants PRDR */
820 extern BOOL preserve_message_logs; /* Save msglog files */
821 extern uschar *primary_hostname; /* Primary name of this computer */
822 extern BOOL print_topbitchars; /* Topbit chars are printing chars */
823 extern uschar *process_info; /* For SIGUSR1 output */
824 extern int process_info_len;
825 extern uschar *process_log_path; /* Alternate path */
826 extern const uschar *process_purpose; /* for debug output */
827 extern BOOL prod_requires_admin; /* TRUE if prodding requires admin */
829 #if defined(SUPPORT_PROXY) || defined(SUPPORT_SOCKS) || defined(EXPERIMENTAL_XCLIENT)
830 extern uschar *hosts_proxy; /* Hostlist which (require) use proxy protocol */
831 extern uschar *proxy_external_address; /* IP of remote interface of proxy */
832 extern int proxy_external_port; /* Port on remote interface of proxy */
833 extern uschar *proxy_local_address; /* IP of local interface of proxy */
834 extern int proxy_local_port; /* Port on local interface of proxy */
835 extern int proxy_protocol_timeout; /* Timeout for proxy negotiation */
836 extern BOOL proxy_session; /* TRUE if receiving mail from valid proxy
837 or sending via one */
840 extern uschar *prvscheck_address; /* Set during prvscheck expansion item */
841 extern uschar *prvscheck_keynum; /* Set during prvscheck expansion item */
842 extern uschar *prvscheck_result; /* Set during prvscheck expansion item */
844 extern qrunner *qrunners; /* tracking data for queues */
846 extern const uschar *qualify_domain_recipient; /* Domain to qualify recipients with */
847 extern uschar *qualify_domain_sender; /* Domain to qualify senders with */
848 extern uschar *queue_domains; /* Queue these domains */
849 #ifndef DISABLE_QUEUE_RAMP
850 extern BOOL queue_fast_ramp; /* 2-phase queue-run overlap */
852 extern BOOL queue_list_requires_admin; /* TRUE if -bp requires admin */
853 /* immediate children */
854 extern pid_t queue_run_pid; /* PID of the queue running process or 0 */
855 extern int queue_run_pipe; /* Pipe for synchronizing */
856 extern int queue_interval; /* Queue running interval */
857 extern uschar *queue_name; /* Name of queue, if nondefault spooling */
858 extern uschar *queue_name_dest; /* Destination queue, for moving messages */
859 extern BOOL queue_only; /* TRUE to disable immediate delivery */
860 extern int queue_only_load; /* Max load before auto-queue */
861 extern BOOL queue_only_load_latch; /* Latch queue_only_load TRUE */
862 extern uschar *queue_only_file; /* Queue if file exists/not-exists */
863 extern BOOL queue_only_override; /* Allow override from command line */
864 extern BOOL queue_run_in_order; /* As opposed to random */
865 extern uschar *queue_run_max; /* Max queue runners */
866 extern unsigned queue_size; /* items in queue */
867 extern time_t queue_size_next; /* next time to evaluate queue_size */
868 extern uschar *queue_smtp_domains; /* Ditto, for these domains */
870 extern unsigned int random_seed; /* Seed for random numbers */
871 extern tree_node *ratelimiters_cmd; /* Results of command ratelimit checks */
872 extern tree_node *ratelimiters_conn; /* Results of connection ratelimit checks */
873 extern tree_node *ratelimiters_mail; /* Results of per-mail ratelimit checks */
874 extern uschar *raw_active_hostname; /* Pre-expansion */
875 extern uschar *raw_sender; /* Before rewriting */
876 extern uschar **raw_recipients; /* Before rewriting */
877 extern int raw_recipients_count;
878 extern const uschar * rc_names[]; /* Mostly for debug output */
879 extern int rcpt_count; /* Count of RCPT commands in a message */
880 extern int rcpt_fail_count; /* Those that got 5xx */
881 extern int rcpt_defer_count; /* Those that got 4xx */
882 extern gid_t real_gid; /* Real gid */
883 extern uid_t real_uid; /* Real user running program */
884 extern int receive_linecount; /* Mainly for BSMTP errors */
885 extern int receive_messagecount; /* Mainly for BSMTP errors */
886 extern int receive_timeout; /* For non-SMTP acceptance */
887 extern int received_count; /* Count of Received: headers */
888 extern uschar *received_for; /* For "for" field */
889 extern uschar *received_header_text; /* Definition of Received: header */
890 extern int received_headers_max; /* Max count of Received: headers */
891 extern struct timeval received_time; /* Time the message started to be received */
892 extern struct timeval received_time_complete; /* Time the message completed reception */
893 extern uschar *recipient_data; /* lookup data for recipients */
894 extern uschar *recipient_unqualified_hosts; /* Permitted unqualified recipients */
895 extern uschar *recipient_verify_failure; /* What went wrong */
896 extern int recipients_list_max; /* Maximum number fitting in list */
897 extern int recipients_max; /* Max permitted */
898 extern BOOL recipients_max_reject; /* If TRUE, reject whole message */
899 extern const pcre2_code *regex_AUTH; /* For recognizing AUTH settings */
900 extern const pcre2_code *regex_check_dns_names; /* For DNS name checking */
901 extern const pcre2_code *regex_From; /* For recognizing "From_" lines */
902 extern const pcre2_code *regex_CHUNKING; /* For recognizing CHUNKING (RFC 3030) */
903 extern const pcre2_code *regex_IGNOREQUOTA; /* For recognizing IGNOREQUOTA (LMTP) */
904 #ifdef EXPERIMENTAL_ESMTP_LIMITS
905 extern const pcre2_code *regex_LIMITS; /* For recognizing LIMITS */
907 extern const pcre2_code *regex_PIPELINING; /* For recognizing PIPELINING */
908 extern const pcre2_code *regex_SIZE; /* For recognizing SIZE settings */
909 #ifndef DISABLE_PIPE_CONNECT
910 extern const pcre2_code *regex_EARLY_PIPE; /* For recognizing PIPE_CONNCT */
912 extern int regex_cachesize; /* number of entries */
913 extern const pcre2_code *regex_ismsgid; /* Compiled r.e. for message ID */
914 extern const pcre2_code *regex_smtp_code; /* For recognizing SMTP codes */
915 #ifdef WHITELIST_D_MACROS
916 extern const pcre2_code *regex_whitelisted_macro; /* For -D macro values */
918 #ifdef WITH_CONTENT_SCAN
919 extern uschar *regex_match_string; /* regex that matched a line (regex ACL condition) */
920 extern const uschar *regex_vars[];
922 extern int remote_delivery_count; /* Number of remote addresses */
923 extern int remote_max_parallel; /* Maximum parallel delivery */
924 extern uschar *remote_sort_domains; /* Remote domain sorting order */
925 extern retry_config *retries; /* Chain of retry config information */
926 extern int retry_data_expire; /* When to expire retry data */
927 extern int retry_interval_max; /* Absolute maximum */
928 extern int retry_maximum_timeout; /* The maximum timeout */
929 extern uschar *return_path; /* Return path for a message */
930 extern BOOL return_path_remove; /* Remove return-path headers */
931 extern int rewrite_existflags; /* Indicate which headers have rewrites */
932 extern uschar *rfc1413_hosts; /* RFC hosts */
933 extern int rfc1413_query_timeout; /* Timeout on RFC 1413 calls */
934 /* extern BOOL rfc821_domains; */ /* If set, syntax is 821, not 822 => being abolished */
935 extern uid_t root_gid; /* The gid for root */
936 extern uid_t root_uid; /* The uid for root */
937 extern router_info routers_available[];/* Vector of available routers */
938 extern router_instance *routers; /* Chain of instantiated routers */
939 extern router_instance router_defaults;/* Default values */
940 extern uschar *router_name; /* Name of router last started */
941 extern tree_node *router_var; /* Variables set by router */
942 extern ip_address_item *running_interfaces; /* Host's running interfaces */
943 extern uschar *running_status; /* Flag string for testing */
944 extern int runrc; /* rc from ${run} */
946 extern uschar *search_error_message; /* Details of lookup problem */
947 extern uschar *self_hostname; /* Self host after routing->directors */
948 extern unsigned int sender_address_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for sender */
949 extern uschar *sender_address_data; /* address_data from sender verify */
950 extern uschar *sender_address_unrewritten; /* Set if rewritten by verify */
951 extern uschar *sender_data; /* lookup result for senders */
952 extern unsigned int sender_domain_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for sender domain */
953 extern uschar *sender_fullhost; /* Sender host name + address */
954 extern BOOL sender_helo_dnssec; /* True if HELO verify used DNS and was DNSSEC */
955 extern uschar *sender_helo_name; /* Host name from HELO/EHLO */
956 extern uschar **sender_host_aliases; /* Points to list of alias names */
957 extern uschar *sender_host_auth_pubname; /* Public-name of authentication method */
958 extern unsigned int sender_host_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for incoming host */
959 extern BOOL sender_host_dnssec; /* true if sender_host_name verified in DNSSEC */
960 extern uschar *sender_ident; /* Sender identity via RFC 1413 */
961 extern uschar *sender_rate; /* Sender rate computed by ACL */
962 extern uschar *sender_rate_limit; /* Configured rate limit */
963 extern uschar *sender_rate_period; /* Configured smoothing period */
964 extern uschar *sender_rcvhost; /* Host data for Received: */
965 extern uschar *sender_unqualified_hosts; /* Permitted unqualified senders */
966 extern uschar *sender_verify_failure; /* What went wrong */
967 extern address_item *sender_verified_list; /* Saved chain of sender verifies */
968 extern address_item *sender_verified_failed; /* The one that caused denial */
969 extern uschar *sending_ip_address; /* Address of outgoing (SMTP) interface */
970 extern int sending_port; /* Port of outgoing interface */
971 extern SIGNAL_BOOL sigalrm_seen; /* Flag for sigalrm_handler */
972 extern const uschar *sigalarm_setter; /* For debug, set to callpoint of alarm() */
973 extern uschar **sighup_argv; /* Args for re-execing after SIGHUP */
974 extern int slow_lookup_log; /* Log DNS lookups taking longer than N millisecs */
975 extern int smtp_accept_count; /* Count of connections */
976 extern BOOL smtp_accept_keepalive; /* Set keepalive on incoming */
977 extern int smtp_accept_max; /* Max SMTP connections */
978 extern int smtp_accept_max_nonmail;/* Max non-mail commands in one con */
979 extern uschar *smtp_accept_max_nonmail_hosts; /* Limit non-mail cmds from these hosts */
980 extern uschar *smtp_accept_max_per_connection; /* Max msgs per connection */
981 extern uschar *smtp_accept_max_per_host; /* Max SMTP cons from one IP addr */
982 extern int smtp_accept_queue; /* Queue after so many connections */
983 extern int smtp_accept_queue_per_connection; /* Queue after so many msgs */
984 extern int smtp_accept_reserve; /* Reserve these SMTP connections */
985 extern uschar *smtp_active_hostname; /* Hostname for this message */
986 extern int smtp_backlog_monitor; /* listen backlog level to log */
987 extern uschar *smtp_banner; /* Banner string (to be expanded) */
988 extern BOOL smtp_check_spool_space; /* TRUE to check SMTP SIZE value */
989 extern int smtp_ch_index; /* Index in smtp_connection_had */
990 extern uschar *smtp_cmd_argument; /* For all SMTP commands */
991 extern uschar *smtp_cmd_buffer; /* SMTP command buffer */
992 extern struct timeval smtp_connection_start; /* Start time of SMTP connection */
993 extern uschar smtp_connection_had[]; /* Recent SMTP commands */
994 extern int smtp_connect_backlog; /* Max backlog permitted */
995 extern double smtp_delay_mail; /* Current MAIL delay */
996 extern double smtp_delay_rcpt; /* Current RCPT delay */
997 extern BOOL smtp_enforce_sync; /* Enforce sync rules */
998 extern uschar *smtp_etrn_command; /* Command to run */
999 extern BOOL smtp_etrn_serialize; /* Only one at once */
1000 extern FILE *smtp_in; /* Incoming SMTP input file */
1001 extern int smtp_listen_backlog; /* Current listener socket backlog, if monitored */
1002 extern int smtp_load_reserve; /* Only from reserved if load > this */
1003 extern int smtp_mailcmd_count; /* Count of MAIL commands */
1004 extern int smtp_mailcmd_max; /* Limit for MAIL commands */
1005 extern int smtp_max_synprot_errors;/* Max syntax/protocol errors */
1006 extern int smtp_max_unknown_commands; /* As it says */
1007 extern uschar *smtp_names[]; /* decode for command codes */
1008 extern uschar *smtp_notquit_reason; /* Global for disconnect reason */
1009 extern FILE *smtp_out; /* Incoming SMTP output file */
1010 extern uschar *smtp_ratelimit_hosts; /* Rate limit these hosts */
1011 extern uschar *smtp_ratelimit_mail; /* Parameters for MAIL limiting */
1012 extern uschar *smtp_ratelimit_rcpt; /* Parameters for RCPT limiting */
1013 extern uschar *smtp_read_error; /* Message for SMTP input error */
1014 extern int smtp_receive_timeout; /* Applies to each received line */
1015 extern uschar *smtp_receive_timeout_s; /* ... expandable version */
1016 extern uschar *smtp_reserve_hosts; /* Hosts for reserved slots */
1017 extern BOOL smtp_return_error_details; /* TRUE to return full info */
1018 extern int smtp_rlm_base; /* Base interval for MAIL rate limit */
1019 extern double smtp_rlm_factor; /* Factor for MAIL rate limit */
1020 extern int smtp_rlm_limit; /* Max delay */
1021 extern int smtp_rlm_threshold; /* Threshold for RCPT rate limit */
1022 extern int smtp_rlr_base; /* Base interval for RCPT rate limit */
1023 extern double smtp_rlr_factor; /* Factor for RCPT rate limit */
1024 extern int smtp_rlr_limit; /* Max delay */
1025 extern int smtp_rlr_threshold; /* Threshold for RCPT rate limit */
1026 extern unsigned smtp_peer_options; /* Global flags for passed connections */
1027 extern unsigned smtp_peer_options_wrap; /* stacked version hidden by TLS */
1029 extern uschar *smtputf8_advertise_hosts; /* ingress control */
1032 #ifdef WITH_CONTENT_SCAN
1033 extern uschar *spamd_address; /* address for the spamassassin daemon */
1034 extern uschar *spam_bar; /* the spam "bar" (textual representation of spam_score) */
1035 extern uschar *spam_report; /* the spamd report (multiline) */
1036 extern uschar *spam_action; /* the spamd recommended-action */
1037 extern uschar *spam_score; /* the spam score (float) */
1038 extern uschar *spam_score_int; /* spam_score * 10 (int) */
1041 extern uschar *spf_guess; /* spf best-guess record */
1042 extern uschar *spf_header_comment; /* spf header comment */
1043 extern uschar *spf_received; /* Received-SPF: header */
1044 extern uschar *spf_result; /* spf result in string form */
1045 extern BOOL spf_result_guessed; /* spf result is of best-guess operation */
1046 extern uschar *spf_smtp_comment; /* spf comment to include in SMTP reply */
1047 extern uschar *spf_smtp_comment_template;
1048 /* template to construct the spf comment by libspf2 */
1050 extern BOOL split_spool_directory; /* TRUE to use multiple subdirs */
1051 extern FILE *spool_data_file; /* handle for -D file */
1052 extern uschar *spool_directory; /* Name of spool directory */
1053 extern BOOL spool_wireformat; /* can write wireformat -D files */
1055 extern uschar *srs_recipient; /* SRS recipient */
1057 extern BOOL strict_acl_vars; /* ACL variables have to be set before being used */
1058 extern int string_datestamp_offset;/* After insertion by string_format */
1059 extern int string_datestamp_length;/* After insertion by string_format */
1060 extern int string_datestamp_type; /* After insertion by string_format */
1061 extern BOOL strip_excess_angle_brackets; /* Surrounding route-addrs */
1062 extern BOOL strip_trailing_dot; /* Remove dots at ends of domains */
1063 extern const uschar *submission_domain;/* Domain for submission mode */
1064 extern const uschar *submission_name; /* User name set from ACL */
1065 extern BOOL syslog_duplication; /* FALSE => no duplicate logging */
1066 extern int syslog_facility; /* As defined by Syslog.h */
1067 extern BOOL syslog_pid; /* TRUE if PID on syslogs */
1068 extern uschar *syslog_processname; /* 'ident' param to openlog() */
1069 extern BOOL syslog_timestamp; /* TRUE if time on syslogs */
1070 extern uschar *system_filter; /* Name of system filter file */
1072 extern uschar *system_filter_directory_transport; /* Transports for the */
1073 extern uschar *system_filter_file_transport; /* system filter */
1074 extern uschar *system_filter_pipe_transport;
1075 extern uschar *system_filter_reply_transport;
1077 extern gid_t system_filter_gid; /* Gid for running system filter */
1078 extern BOOL system_filter_gid_set; /* TRUE if gid set */
1079 extern uid_t system_filter_uid; /* Uid for running system filter */
1080 extern BOOL system_filter_uid_set; /* TRUE if uid set */
1082 extern blob tcp_fastopen_nodata; /* for zero-data TFO connect requests */
1083 extern BOOL tcp_nodelay; /* Controls TCP_NODELAY on daemon */
1084 extern tfo_state_t tcp_out_fastopen; /* TCP fast open */
1085 #ifdef USE_TCP_WRAPPERS
1086 extern uschar *tcp_wrappers_daemon_name; /* tcpwrappers daemon lookup name */
1088 extern int test_harness_load_avg; /* For use when testing */
1089 extern int thismessage_size_limit; /* Limit for this message */
1090 extern int timeout_frozen_after; /* Max time to keep frozen messages */
1091 #ifdef MEASURE_TIMING
1092 extern struct timeval timestamp_startup; /* For development measurements */
1095 extern uschar *transport_name; /* Name of transport last started */
1096 extern int transport_count; /* Count of bytes transported */
1097 extern int transport_newlines; /* Accurate count of number of newline chars transported */
1098 extern const uschar **transport_filter_argv; /* For on-the-fly filtering */
1099 extern int transport_filter_timeout; /* Timeout for same */
1101 extern transport_info transports_available[]; /* Vector of available transports */
1102 extern transport_instance *transports; /* Chain of instantiated transports */
1103 extern transport_instance transport_defaults; /* Default values */
1105 extern int transport_write_timeout;/* Set to time out individual writes */
1107 extern tree_node *tree_dns_fails; /* Tree of DNS lookup failures */
1108 extern tree_node *tree_duplicates; /* Tree of duplicate addresses */
1109 extern tree_node *tree_nonrecipients; /* Tree of nonrecipient addresses */
1110 extern tree_node *tree_unusable; /* Tree of unusable addresses */
1112 extern gid_t *trusted_groups; /* List of trusted groups */
1113 extern uid_t *trusted_users; /* List of trusted users */
1114 extern uschar *timezone_string; /* Required timezone setting */
1116 extern uschar *unknown_login; /* To use when login id unknown */
1117 extern uschar *unknown_username; /* Ditto */
1118 extern uschar *untrusted_set_sender; /* Let untrusted users set these senders */
1119 extern uschar *uucp_from_pattern; /* For recognizing "From " lines */
1120 extern uschar *uucp_from_sender; /* For building the sender */
1122 extern uschar *warn_message_file; /* Template for warning messages */
1123 extern const uschar *warnmsg_delay; /* String form of delay time */
1124 extern const uschar *warnmsg_recipients; /* Recipients of warning message */
1125 extern BOOL write_rejectlog; /* Control of reject logging */
1127 extern uschar *verify_mode; /* Running a router in verify mode */
1128 extern uschar *version_copyright; /* Copyright notice */
1129 extern uschar *version_date; /* Date of compilation */
1130 extern uschar *version_cnumber; /* Compile number */
1131 extern uschar *version_string; /* Version string */
1133 extern int warning_count; /* Delay warnings sent for this msg */
1135 /* End of globals.h */
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