1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* Copyright (c) The Exim Maintainers 2020 - 2021 */
7 /* See the file NOTICE for conditions of use and distribution. */
9 /* Almost all the global variables are defined together in this one header, so
10 that they are easy to find. However, those that are visible during the
11 compilation of the local_scan() function are defined separately in the
12 local_scan.h header file. */
14 /* First put any specials that are required for some operating systems. */
20 /* We need to be careful about width of int and atomicity in signal handlers,
21 especially with the rise of 64-bit systems breaking older assumptions. But
22 sig_atomic_t comes from signal.h so can't go into mytypes.h without including
23 signal support in local_scan, which seems precipitous. */
24 typedef volatile sig_atomic_t SIGNAL_BOOL;
26 /* Now things that are present only when configured. */
29 extern uschar *opt_perl_startup; /* Startup code for Perl interpreter */
30 extern BOOL opt_perl_at_start; /* Start Perl interpreter at start */
31 extern BOOL opt_perl_started; /* Set once interpreter started */
32 extern BOOL opt_perl_taintmode; /* Enable taint mode in Perl */
36 extern tree_node *dlobj_anchor; /* Tree of dynamically-loaded objects */
40 extern uschar *ibase_servers;
44 extern uschar *eldap_ca_cert_dir; /* Directory with CA certificates */
45 extern uschar *eldap_ca_cert_file; /* CA certificate file */
46 extern uschar *eldap_cert_file; /* Certificate file */
47 extern uschar *eldap_cert_key; /* Certificate key file */
48 extern uschar *eldap_cipher_suite; /* Allowed cipher suite */
49 extern uschar *eldap_default_servers; /* List of default servers */
50 extern uschar *eldap_require_cert; /* Peer certificate checking strategy */
51 extern BOOL eldap_start_tls; /* Use STARTTLS */
52 extern int eldap_version; /* LDAP version */
56 extern uschar *mysql_servers; /* List of servers and connect info */
60 extern uschar *oracle_servers; /* List of servers and connect info */
64 extern uschar *pgsql_servers; /* List of servers and connect info */
68 extern uschar *redis_servers; /* List of servers and connect info */
72 extern uschar *sqlite_dbfile; /* Filname for database */
73 extern int sqlite_lock_timeout; /* Internal lock waiting timeout */
76 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
77 extern BOOL move_frozen_messages; /* Get them out of the normal directory */
80 /* These variables are outside the #ifdef because it keeps the code less
81 cluttered in several places (e.g. during logging) if we can always refer to
82 them. Also, the tls_ variables are now always visible. */
85 client_conn_ctx active; /* fd/socket when in a TLS session, and ptr to TLS context */
86 int bits; /* bits used in TLS session */
87 BOOL certificate_verified; /* Client certificate verified */
89 BOOL dane_verified; /* ... via DANE */
90 int tlsa_usage; /* TLSA record(s) usage */
92 uschar *cipher; /* Cipher used */
93 const uschar *cipher_stdname; /* Cipher used, RFC version */
94 const uschar *ver; /* TLS version */
96 BOOL on_connect; /* For older MTAs that don't STARTTLS */
97 uschar *on_connect_ports; /* Ports always tls-on-connect */
98 void *ourcert; /* Certificate we presented, binary */
99 void *peercert; /* Certificate of peer, binary */
100 uschar *peerdn; /* DN from peer */
101 uschar *sni; /* Server Name Indication */
102 uschar *channelbinding; /* b64'd data identifying channel, for authenticators */
104 OCSP_NOT_REQ=0, /* not requested */
105 OCSP_NOT_RESP, /* no response to request */
106 OCSP_VFY_NOT_TRIED, /* response not verified */
107 OCSP_FAILED, /* verify failed */
108 OCSP_VFIED /* verified */
109 } ocsp; /* Stapled OCSP status */
110 #ifndef DISABLE_TLS_RESUME
111 unsigned resumption; /* Session resumption */
112 BOOL host_resumable:1;
113 BOOL ticket_received:1;
115 BOOL verify_override:1; /* certificate_verified only due to tls_try_verify_hosts */
116 BOOL ext_master_secret:1; /* extended-master-secret was used */
118 extern tls_support tls_in;
119 extern tls_support tls_out;
122 extern BOOL gnutls_compat_mode; /* Less security, more compatibility */
123 extern BOOL gnutls_allow_auto_pkcs11; /* Let GnuTLS autoload PKCS11 modules */
124 extern uschar *hosts_require_alpn; /* Mandatory ALPN successful nogitiation */
125 extern uschar *openssl_options; /* OpenSSL compatibility options */
126 extern const pcre2_code *regex_STARTTLS; /* For recognizing STARTTLS settings */
127 extern uschar *tls_alpn; /* ALPN names acceptable */
128 extern uschar *tls_certificate; /* Certificate file */
129 extern uschar *tls_crl; /* CRL File */
130 extern int tls_dh_max_bits; /* don't accept higher lib suggestions */
131 extern uschar *tls_dhparam; /* DH param file */
132 extern uschar *tls_eccurve; /* EC curve */
133 # ifndef DISABLE_OCSP
134 extern uschar *tls_ocsp_file; /* OCSP stapling proof file */
136 extern uschar *tls_privatekey; /* Private key file */
137 extern BOOL tls_remember_esmtp; /* For YAEB */
138 extern uschar *tls_require_ciphers; /* So some can be avoided */
139 # ifndef DISABLE_TLS_RESUME
140 extern uschar *tls_resumption_hosts; /* TLS session resumption */
142 extern uschar *tls_try_verify_hosts; /* Optional client verification */
143 extern uschar *tls_verify_certificates;/* Path for certificates to check */
144 extern uschar *tls_verify_hosts; /* Mandatory client verification */
145 extern int tls_watch_fd; /* for inotify of creds files */
146 extern time_t tls_watch_trigger_time; /* non-0: triggered */
148 extern uschar *tls_advertise_hosts; /* host for which TLS is advertised */
150 extern uschar *dsn_envid; /* DSN envid string */
151 extern int dsn_ret; /* DSN ret type*/
152 extern const pcre2_code *regex_DSN; /* For recognizing DSN settings */
153 extern uschar *dsn_advertise_hosts; /* host for which TLS is advertised */
155 /* Input-reading functions for messages, so we can use special ones for
158 extern int (*lwr_receive_getc)(unsigned);
159 extern uschar * (*lwr_receive_getbuf)(unsigned *);
160 extern BOOL (*lwr_receive_hasc)(void);
161 extern int (*lwr_receive_ungetc)(int);
163 extern int (*receive_getc)(unsigned);
164 extern uschar * (*receive_getbuf)(unsigned *);
165 extern BOOL (*receive_hasc)(void);
166 extern void (*receive_get_cache)(unsigned);
167 extern int (*receive_ungetc)(int);
168 extern int (*receive_feof)(void);
169 extern int (*receive_ferror)(void);
172 /* For clearing, saving, restoring address expansion variables. We have to have
173 the size of this vector set explicitly, because it is referenced from more than
176 extern const uschar **address_expansions[ADDRESS_EXPANSIONS_COUNT];
178 /* Flags for which we don't need an address ever so can use a bitfield */
180 extern struct global_flags {
181 BOOL acl_temp_details :1; /* TRUE to give details for 4xx error */
182 BOOL active_local_from_check :1; /* For adding Sender: (switchable) */
183 BOOL active_local_sender_retain :1; /* For keeping Sender: (switchable) */
184 BOOL address_test_mode :1; /* True for -bt */
185 BOOL admin_user :1; /* True if caller can do admin */
186 BOOL allow_auth_unadvertised :1; /* As it says */
187 BOOL allow_unqualified_recipient :1; /* For local messages */ /* As it says */
188 BOOL allow_unqualified_sender :1; /* Reset for SMTP */ /* Ditto */
189 BOOL authentication_local :1; /* TRUE if non-smtp (implicit authentication) */
191 BOOL background_daemon :1; /* Set FALSE to keep in foreground */
192 BOOL bdat_readers_wanted :1; /* BDAT-handling to be pushed on readfunc stack */
194 BOOL chunking_offered :1;
195 BOOL config_changed :1; /* True if -C used */
196 BOOL continue_more :1; /* Flag more addresses waiting */
198 BOOL daemon_listen :1; /* True if listening required */
199 BOOL debug_daemon :1; /* Debug the daemon process only */
200 BOOL deliver_firsttime :1; /* True for first delivery attempt */
201 BOOL deliver_force :1; /* TRUE if delivery was forced */
202 BOOL deliver_freeze :1; /* TRUE if delivery is frozen */
203 BOOL deliver_force_thaw :1; /* TRUE to force thaw in queue run */
204 BOOL deliver_manual_thaw :1; /* TRUE if manually thawed */
205 BOOL deliver_selectstring_regex :1; /* String is regex */
206 BOOL deliver_selectstring_sender_regex :1; /* String is regex */
207 BOOL disable_callout_flush :1; /* Don't flush before callouts */
208 BOOL disable_delay_flush :1; /* Don't flush before "delay" in ACL */
209 BOOL disable_logging :1; /* Disables log writing when TRUE */
211 BOOL dkim_disable_verify :1; /* Set via ACL control statement. When set, DKIM verification is disabled for the current message */
212 BOOL dkim_init_done :1; /* lazy-init status */
215 BOOL dmarc_has_been_checked :1; /* Global variable to check if test has been called yet */
216 BOOL dmarc_disable_verify :1; /* Set via ACL control statement. When set, DMARC verification is disabled for the current message */
217 BOOL dmarc_enable_forensic :1; /* Set via ACL control statement. When set, DMARC forensic reports are enabled for the current message */
219 BOOL dont_deliver :1; /* TRUE for -N option */
220 BOOL dot_ends :1; /* TRUE if "." ends non-SMTP input */
222 BOOL enable_dollar_recipients :1; /* Make $recipients available */
223 BOOL expand_string_forcedfail :1; /* TRUE if failure was "expected" */
225 BOOL filter_running :1; /* TRUE while running a filter */
227 BOOL header_rewritten :1; /* TRUE if header changed by router */
228 BOOL helo_verified :1; /* True if HELO verified */
229 BOOL helo_verify_failed :1; /* True if attempt failed */
230 BOOL host_checking_callout :1; /* TRUE if real callout wanted */
231 BOOL host_find_failed_syntax :1; /* DNS syntax check failure */
233 BOOL inetd_wait_mode :1; /* Whether running in inetd wait mode */
234 BOOL is_inetd :1; /* True for inetd calls */
236 BOOL local_error_message :1; /* True if handling one of these */
237 BOOL log_testing_mode :1; /* TRUE in various testing modes */
239 #ifdef WITH_CONTENT_SCAN
240 BOOL no_mbox_unspool :1; /* don't unlink files in /scan directory */
242 BOOL no_multiline_responses :1; /* For broken clients */
244 BOOL parse_allow_group :1; /* Allow group syntax */
245 BOOL parse_found_group :1; /* In the middle of a group */
246 BOOL pipelining_enable :1; /* As it says */
247 #if defined(SUPPORT_PROXY) || defined(SUPPORT_SOCKS)
248 BOOL proxy_session_failed :1; /* TRUE if required proxy negotiation failed */
251 BOOL queue_2stage :1; /* Run queue in 2-stage manner */
252 BOOL queue_only_policy :1; /* ACL or local_scan wants queue_only */
253 BOOL queue_run_first_delivery :1; /* If TRUE, first deliveries only */
254 BOOL queue_run_force :1; /* TRUE to force during queue run */
255 BOOL queue_run_local :1; /* Local deliveries only in queue run */
256 BOOL queue_running :1; /* TRUE for queue running process and */
257 BOOL queue_smtp :1; /* Disable all immediate SMTP (-odqs)*/
259 BOOL really_exim :1; /* FALSE in utilities */
260 BOOL receive_call_bombout :1; /* Flag for crashing log */
261 BOOL recipients_discarded :1; /* By an ACL */
262 BOOL running_in_test_harness :1; /*TRUE when running_status is patched */
264 BOOL search_find_defer :1; /* Set TRUE if lookup deferred */
265 BOOL sender_address_forced :1; /* Set by -f */
266 BOOL sender_host_notsocket :1; /* Set for -bs and -bS */
267 BOOL sender_host_unknown :1; /* TRUE for -bs and -bS except inetd */
268 BOOL sender_local :1; /* TRUE for local senders */
269 BOOL sender_name_forced :1; /* Set by -F */
270 BOOL sender_set_untrusted :1; /* Sender set by untrusted caller */
271 BOOL smtp_authenticated :1; /* Sending client has authenticated */
272 #ifndef DISABLE_PIPE_CONNECT
273 BOOL smtp_in_early_pipe_advertised :1; /* server advertised PIPECONNECT */
274 BOOL smtp_in_early_pipe_no_auth :1; /* too many authenticator names */
275 BOOL smtp_in_early_pipe_used :1; /* client did send early data */
277 BOOL smtp_in_pipelining_advertised :1; /* server advertised PIPELINING */
278 BOOL smtp_in_pipelining_used :1; /* server noted client using PIPELINING */
279 BOOL smtp_in_quit :1; /* server noted QUIT command */
280 BOOL spool_file_wireformat :1; /* current -D file has CRLF rather than NL */
281 BOOL submission_mode :1; /* Can be forced from ACL */
282 BOOL suppress_local_fixups :1; /* Can be forced from ACL */
283 BOOL suppress_local_fixups_default :1; /* former is reset to this; override with -G */
284 BOOL synchronous_delivery :1; /* TRUE if -odi is set */
285 BOOL system_filtering :1; /* TRUE when running system filter */
287 BOOL taint_check_slow :1; /* malloc/mmap are not returning distinct ranges */
288 BOOL testsuite_delays :1; /* interprocess sequencing delays, under testsuite */
289 BOOL tcp_fastopen_ok :1; /* appears to be supported by kernel */
290 BOOL tcp_in_fastopen :1; /* conn usefully used fastopen */
291 BOOL tcp_in_fastopen_data :1; /* fastopen carried data */
292 BOOL tcp_in_fastopen_logged :1; /* one-time logging */
293 BOOL tcp_out_fastopen_logged :1; /* one-time logging */
294 BOOL timestamps_utc :1; /* Use UTC for all times */
295 BOOL transport_filter_timed_out :1; /* True if it did */
296 BOOL trusted_caller :1; /* Caller is trusted */
297 BOOL trusted_config :1; /* Configuration file is trusted */
301 /* General global variables */
303 extern BOOL accept_8bitmime; /* Allow *BITMIME incoming */
304 extern uschar *add_environment; /* List of environment variables to add */
305 extern header_line *acl_added_headers; /* Headers added by an ACL */
306 extern tree_node *acl_anchor; /* Tree of named ACLs */
307 extern uschar *acl_arg[9]; /* Argument to ACL call */
308 extern int acl_narg; /* Number of arguments to ACL call */
309 extern int acl_level; /* Nesting depth and debug indent */
310 extern uschar *acl_not_smtp; /* ACL run for non-SMTP messages */
311 #ifdef WITH_CONTENT_SCAN
312 extern uschar *acl_not_smtp_mime; /* For MIME parts of ditto */
314 extern uschar *acl_not_smtp_start; /* ACL run at the beginning of a non-SMTP session */
315 extern uschar *acl_removed_headers; /* Headers deleted by an ACL */
316 extern uschar *acl_smtp_auth; /* ACL run for AUTH */
317 extern uschar *acl_smtp_connect; /* ACL run on SMTP connection */
318 extern uschar *acl_smtp_data; /* ACL run after DATA received */
320 extern uschar *acl_smtp_data_prdr; /* ACL run after DATA received if in PRDR mode*/
321 const extern pcre2_code *regex_PRDR; /* For recognizing PRDR settings */
324 extern uschar *acl_smtp_dkim; /* ACL run for DKIM signatures / domains */
326 extern uschar *acl_smtp_etrn; /* ACL run for ETRN */
327 extern uschar *acl_smtp_expn; /* ACL run for EXPN */
328 extern uschar *acl_smtp_helo; /* ACL run for HELO/EHLO */
329 extern uschar *acl_smtp_mail; /* ACL run for MAIL */
330 extern uschar *acl_smtp_mailauth; /* ACL run for MAIL AUTH */
331 #ifdef WITH_CONTENT_SCAN
332 extern uschar *acl_smtp_mime; /* ACL run after DATA, before acl_smtp_data, for each MIME part */
334 extern uschar *acl_smtp_notquit; /* ACL run for disconnects */
335 extern uschar *acl_smtp_predata; /* ACL run for DATA command */
336 extern uschar *acl_smtp_quit; /* ACL run for QUIT */
337 extern uschar *acl_smtp_rcpt; /* ACL run for RCPT */
338 extern uschar *acl_smtp_starttls; /* ACL run for STARTTLS */
339 extern uschar *acl_smtp_vrfy; /* ACL run for VRFY */
340 extern tree_node *acl_var_c; /* ACL connection variables */
341 extern tree_node *acl_var_m; /* ACL message variables */
342 extern uschar *acl_verify_message; /* User message for verify failure */
343 extern string_item *acl_warn_logged; /* Logged lines */
344 extern uschar *acl_wherecodes[]; /* Response codes for ACL fails */
345 extern uschar *acl_wherenames[]; /* Names for messages */
346 extern address_item *addr_duplicate; /* Duplicate address list */
347 extern address_item address_defaults; /* Default data for address item */
348 extern uschar *address_file; /* Name of file when delivering to one */
349 extern uschar *address_pipe; /* Pipe command when delivering to one */
350 extern tree_node *addresslist_anchor; /* Tree of defined address lists */
351 extern int addresslist_count; /* Number defined */
352 extern gid_t *admin_groups; /* List of admin groups */
353 extern BOOL allow_domain_literals; /* As it says */
354 extern BOOL allow_mx_to_ip; /* Allow MX records to -> ip address */
355 #ifdef EXPERIMENTAL_ARC
356 extern struct arc_set *arc_received; /* highest ARC instance evaluation struct */
357 extern int arc_received_instance; /* highest ARC instance number in headers */
358 extern int arc_oldest_pass; /* lowest passing instance number in headers */
359 extern const uschar *arc_state; /* verification state */
360 extern const uschar *arc_state_reason;
362 extern BOOL allow_utf8_domains; /* For experimenting */
363 extern uschar *authenticated_fail_id; /* ID that failed authentication */
364 extern uschar *authenticated_id; /* ID that was authenticated */
365 extern uschar *authenticated_sender; /* From AUTH on MAIL */
366 extern BOOL authentication_failed; /* TRUE if AUTH was tried and failed */
367 extern uschar *authenticator_name; /* for debug and error messages */
368 extern uschar *auth_advertise_hosts; /* Only advertise to these */
369 extern auth_info auths_available[]; /* Vector of available auth mechanisms */
370 extern auth_instance *auths; /* Chain of instantiated auths */
371 extern auth_instance auth_defaults; /* Default values */
372 extern uschar *auth_defer_msg; /* Error message for log */
373 extern uschar *auth_defer_user_msg; /* Error message for user */
374 extern const uschar *auth_vars[]; /* $authn variables */
375 extern int auto_thaw; /* Auto-thaw interval */
376 #ifdef WITH_CONTENT_SCAN
377 extern int av_failed; /* TRUE if the AV process failed */
378 extern uschar *av_scanner; /* AntiVirus scanner to use for the malware condition */
381 extern uschar *base62_chars; /* Table of base-62 characters */
382 extern uschar *bi_command; /* Command for -bi option */
383 extern uschar *big_buffer; /* Used for various temp things */
384 extern int big_buffer_size; /* Current size (can expand) */
385 #ifdef EXPERIMENTAL_BRIGHTMAIL
386 extern uschar *bmi_alt_location; /* expansion variable that contains the alternate location for the rcpt (available during routing) */
387 extern uschar *bmi_base64_tracker_verdict; /* expansion variable with base-64 encoded OLD verdict string (available during routing) */
388 extern uschar *bmi_base64_verdict; /* expansion variable with base-64 encoded verdict string (available during routing) */
389 extern uschar *bmi_config_file; /* Brightmail config file */
390 extern int bmi_deliver; /* Flag that determines if the message should be delivered to the rcpt (available during routing) */
391 extern int bmi_run; /* Flag that determines if message should be run through Brightmail server */
392 extern uschar *bmi_verdicts; /* BASE64-encoded verdicts with recipient lists */
394 extern int bsmtp_transaction_linecount; /* Start of last transaction */
395 extern int body_8bitmime; /* sender declared BODY= ; 7=7BIT, 8=8BITMIME */
396 extern uschar *bounce_message_file; /* Template file */
397 extern uschar *bounce_message_text; /* One-liner */
398 extern uschar *bounce_recipient; /* When writing an errmsg */
399 extern BOOL bounce_return_body; /* Include body in returned message */
400 extern int bounce_return_linesize_limit; /* Max line length in return */
401 extern BOOL bounce_return_message; /* Include message in bounce */
402 extern int bounce_return_size_limit; /* Max amount to return */
403 extern uschar *bounce_sender_authentication; /* AUTH address for bounces */
405 extern uschar *callout_address; /* Address used for a malware/spamd/verify etc. callout */
406 extern int callout_cache_domain_positive_expire; /* Time for positive domain callout cache records to expire */
407 extern int callout_cache_domain_negative_expire; /* Time for negative domain callout cache records to expire */
408 extern int callout_cache_positive_expire; /* Time for positive callout cache records to expire */
409 extern int callout_cache_negative_expire; /* Time for negative callout cache records to expire */
410 extern uschar *callout_random_local_part; /* Local part to be used to check if server called will accept any local part */
411 extern uschar *check_dns_names_pattern;/* Regex for syntax check */
412 extern int check_log_inodes; /* Minimum for message acceptance */
413 extern int_eximarith_t check_log_space; /* Minimum for message acceptance */
414 extern BOOL check_rfc2047_length; /* Check RFC 2047 encoded string length */
415 extern int check_spool_inodes; /* Minimum for message acceptance */
416 extern int_eximarith_t check_spool_space; /* Minimum for message acceptance */
417 extern uschar *chunking_advertise_hosts; /* RFC 3030 CHUNKING */
418 extern unsigned chunking_datasize;
419 extern unsigned chunking_data_left;
420 extern chunking_state_t chunking_state;
421 extern uschar *client_authenticator; /* Authenticator name used for smtp delivery */
422 extern uschar *client_authenticated_id; /* "login" name used for SMTP AUTH */
423 extern uschar *client_authenticated_sender; /* AUTH option to SMTP MAIL FROM (not yet used) */
424 #ifndef DISABLE_CLIENT_CMD_LOG
425 extern gstring *client_cmd_log; /* debug log of client cmds & responses */
427 extern int clmacro_count; /* Number of command line macros */
428 extern uschar *clmacros[]; /* Copy of them, for re-exec */
429 extern BOOL commandline_checks_require_admin; /* belt and braces for insecure setups */
430 extern int connection_max_messages;/* Max down one SMTP connection */
431 extern FILE *config_file; /* Configuration file */
432 extern const uschar *config_filename; /* Configuration file name */
433 extern gid_t config_gid; /* Additional group owner */
434 extern int config_lineno; /* Line number */
435 extern uschar *config_main_filelist; /* List of possible config files */
436 extern uschar *config_main_filename; /* File name actually used */
437 extern uschar *config_main_directory; /* Directory where the main config file was found */
438 extern uid_t config_uid; /* Additional owner */
439 extern uschar *continue_proxy_cipher; /* TLS cipher for proxied continued delivery */
440 extern BOOL continue_proxy_dane; /* proxied conn is DANE */
441 extern uschar *continue_proxy_sni; /* proxied conn SNI */
442 extern uschar *continue_hostname; /* Host for continued delivery */
443 extern uschar *continue_host_address; /* IP address for ditto */
444 extern int continue_sequence; /* Sequence num for continued delivery */
445 extern uschar *continue_transport; /* Transport for continued delivery */
446 #ifdef EXPERIMENTAL_ESMTP_LIMITS
447 extern unsigned continue_limit_mail; /* Peer advertised limit */
448 extern unsigned continue_limit_rcpt;
449 extern unsigned continue_limit_rcptdom;
453 extern uschar *csa_status; /* Client SMTP Authorization result */
456 unsigned callout_hold_only:1; /* Conn is only for verify callout */
457 unsigned delivery:1; /* When to attempt */
458 unsigned defer_pass:1; /* Pass 4xx to caller rather than spooling */
459 unsigned is_tls:1; /* Conn has TLS active */
460 client_conn_ctx cctx; /* Open connection */
461 int nrcpt; /* Count of addresses */
462 uschar * transport; /* Name of transport */
463 uschar * interface; /* (address of) */
464 uschar * snd_ip; /* sending_ip_address */
465 int snd_port; /* sending_port */
466 unsigned peer_options; /* smtp_peer_options */
467 host_item host; /* Host used */
468 address_item addr; /* (Chain of) addresses */
470 extern cut_t cutthrough; /* Deliver-concurrently */
472 extern int daemon_notifier_fd; /* Unix socket for notifications */
473 extern uschar *daemon_smtp_port; /* Can be a list of ports */
474 extern int daemon_startup_retries; /* Number of times to retry */
475 extern int daemon_startup_sleep; /* Sleep between retries */
477 #ifdef EXPERIMENTAL_DCC
478 extern BOOL dcc_direct_add_header; /* directly add header */
479 extern uschar *dcc_header; /* dcc header */
480 extern uschar *dcc_result; /* dcc result */
481 extern uschar *dccifd_address; /* address of the dccifd daemon */
482 extern uschar *dccifd_options; /* options for the dccifd daemon */
485 extern int debug_fd; /* The fd for debug_file */
486 extern FILE *debug_file; /* Where to write debugging info */
487 extern int debug_notall[]; /* Debug options excluded from +all */
488 extern bit_table debug_options[]; /* Table of debug options */
489 extern int debug_options_count; /* Size of table */
490 extern unsigned debug_pretrigger_bsize;
491 extern uschar *debug_pretrigger_buf; /* circular buffer for precapture */
492 extern BOOL debug_store; /* Do extra checks on store_reset */
493 extern int delay_warning[]; /* Times between warnings */
494 extern uschar *delay_warning_condition; /* Condition string for warnings */
495 extern BOOL delivery_date_remove; /* Remove delivery-date headers */
497 extern uschar *deliver_address_data; /* Arbitrary data for an address */
498 extern int deliver_datafile; /* FD for data part of message */
499 extern const uschar *deliver_domain; /* The local domain for delivery */
500 extern uschar *deliver_domain_data; /* From domain lookup */
501 extern const uschar *deliver_domain_orig; /* The original local domain for delivery */
502 extern const uschar *deliver_domain_parent; /* The parent domain for delivery */
503 extern BOOL deliver_drop_privilege; /* TRUE for unprivileged delivery */
504 extern time_t deliver_frozen_at; /* Time of freezing */
505 extern uschar *deliver_home; /* Home directory for pipes */
506 extern const uschar *deliver_host; /* (First) host for routed local deliveries */
507 /* Remote host for filter */
508 extern const uschar *deliver_host_address; /* Address for remote delivery filter */
509 extern int deliver_host_port; /* Address for remote delivery filter */
510 extern uschar *deliver_in_buffer; /* Buffer for copying file */
511 extern ino_t deliver_inode; /* Inode for appendfile */
512 extern uschar *deliver_localpart; /* The local part for delivery */
513 extern uschar *deliver_localpart_data; /* From local part lookup (de-tainted) */
514 extern uschar *deliver_localpart_orig; /* The original local part for delivery */
515 extern uschar *deliver_localpart_parent; /* The parent local part for delivery */
516 extern uschar *deliver_localpart_prefix; /* The stripped prefix, if any */
517 extern uschar *deliver_localpart_prefix_v; /* The stripped-prefix variable portion, if any */
518 extern uschar *deliver_localpart_suffix; /* The stripped suffix, if any */
519 extern uschar *deliver_localpart_suffix_v; /* The stripped-suffix variable portion, if any */
520 extern uschar *deliver_out_buffer; /* Buffer for copying file */
521 extern int deliver_queue_load_max; /* Different value for queue running */
522 extern address_item *deliver_recipients; /* Current set of addresses */
523 extern uschar *deliver_selectstring; /* For selecting by recipient */
524 extern uschar *deliver_selectstring_sender; /* For selecting by sender */
525 #ifdef ENABLE_DISABLE_FSYNC
526 extern BOOL disable_fsync; /* Not for normal use */
528 extern BOOL disable_ipv6; /* Don't do any IPv6 things */
531 extern unsigned dkim_collect_input; /* Runtime count of dkim signtures; tracks whether SMTP input is fed to DKIM validation */
532 extern uschar *dkim_cur_signer; /* Expansion variable, holds the current "signer" domain or identity during a acl_smtp_dkim run */
533 extern int dkim_key_length; /* Expansion variable, length of signing key in bits */
534 extern void *dkim_signatures; /* Actually a (pdkim_signature *) but most files do not need to know */
535 extern uschar *dkim_signers; /* Expansion variable, holds colon-separated list of domains and identities that have signed a message */
536 extern uschar *dkim_signing_domain; /* Expansion variable, domain used for signing a message. */
537 extern uschar *dkim_signing_selector; /* Expansion variable, selector used for signing a message. */
538 extern uschar *dkim_verify_hashes; /* Preference order for signatures */
539 extern uschar *dkim_verify_keytypes; /* Preference order for signatures */
540 extern uschar *dkim_verify_min_keysizes; /* list of minimum key sizes, keyed by algo */
541 extern BOOL dkim_verify_minimal; /* Shortcircuit signture verification */
542 extern uschar *dkim_verify_overall; /* First successful domain verified, or null */
543 extern uschar *dkim_verify_signers; /* Colon-separated list of domains for each of which we call the DKIM ACL */
544 extern uschar *dkim_verify_status; /* result for this signature */
545 extern uschar *dkim_verify_reason; /* result for this signature */
548 extern uschar *dmarc_domain_policy; /* Expansion for declared policy of used domain */
549 extern uschar *dmarc_forensic_sender; /* Set sender address for forensic reports */
550 extern uschar *dmarc_history_file; /* Expansion variable, file to store dmarc results */
551 extern uschar *dmarc_status; /* Expansion variable, one word value */
552 extern uschar *dmarc_status_text; /* Expansion variable, human readable value */
553 extern uschar *dmarc_tld_file; /* Mozilla TLDs text file */
554 extern uschar *dmarc_used_domain; /* Expansion variable, domain libopendmarc chose for DMARC policy lookup */
557 extern uschar *dns_again_means_nonexist; /* Domains that are badly set up */
558 extern int dns_csa_search_limit; /* How deep to search for CSA SRV records */
559 extern BOOL dns_csa_use_reverse; /* Check CSA in reverse DNS? (non-standard) */
560 extern int dns_cname_loops; /* Follow CNAMEs returned by resolver to this depth */
561 extern uschar *dns_ipv4_lookup; /* For these domains, don't look for AAAA (or A6) */
563 extern int dns_dane_ok; /* Ok to use DANE when checking TLS authenticity */
565 extern int dns_retrans; /* Retransmission time setting */
566 extern int dns_retry; /* Number of retries */
567 extern int dns_dnssec_ok; /* When constructing DNS query, set DO flag */
568 extern const uschar * dns_rc_names[]; /* Mostly for debug output */
569 extern uschar *dns_trust_aa; /* DNSSEC trust AA as AD */
570 extern int dns_use_edns0; /* Coerce EDNS0 support on/off in resolver. */
571 extern uschar *dnslist_domain; /* DNS (black) list domain */
572 extern uschar *dnslist_matched; /* DNS (black) list matched key */
573 extern uschar *dnslist_text; /* DNS (black) list text message */
574 extern uschar *dnslist_value; /* DNS (black) list IP address */
575 extern tree_node *domainlist_anchor; /* Tree of defined domain lists */
576 extern int domainlist_count; /* Number defined */
578 /* This option is now a no-opt, retained for compatibility */
579 extern BOOL drop_cr; /* For broken local MUAs */
580 extern const uschar *driver_srcfile; /* For debug & errors */
581 extern int driver_srcline; /* For debug & errors */
583 extern unsigned int dtrigger_selector; /* when to start debug */
585 extern uschar *dsn_from; /* From: string for DSNs */
587 extern BOOL envelope_to_remove; /* Remove envelope_to_headers */
588 extern int errno_quota; /* Quota errno in this OS */
589 extern int error_handling; /* Error handling style */
590 extern uschar *errors_copy; /* For taking copies of errors */
591 extern uschar *errors_reply_to; /* Reply-to for error messages */
592 extern int errors_sender_rc; /* Return after message to sender*/
594 #ifndef DISABLE_EVENT
595 extern uschar *event_action; /* expansion for delivery events */
596 extern uschar *event_data; /* event data */
597 extern int event_defer_errno; /* error number set when a remote delivery is deferred with a host error */
598 extern const uschar *event_name; /* event classification */
601 extern gid_t exim_gid; /* To be used with exim_uid */
602 extern BOOL exim_gid_set; /* TRUE if exim_gid set */
603 extern uschar *exim_path; /* Path to exec exim */
604 extern const uschar *exim_sieve_extension_list[]; /* list of sieve extensions */
605 extern uid_t exim_uid; /* Non-root uid for exim */
606 extern BOOL exim_uid_set; /* TRUE if exim_uid set */
607 extern int expand_level; /* Nesting depth; indent for debug */
608 extern int expand_forbid; /* RDO flags for forbidding things */
609 extern int expand_nlength[]; /* Lengths of numbered strings */
610 extern int expand_nmax; /* Max numerical value */
611 extern const uschar *expand_nstring[]; /* Numbered strings */
612 extern BOOL extract_addresses_remove_arguments; /* Controls -t behaviour */
613 extern uschar *extra_local_interfaces; /* Local, non-listen interfaces */
615 extern int fake_response; /* Fake FAIL or DEFER response to data */
616 extern uschar *fake_response_text; /* User defined message for the above. Default is in globals.c. */
617 extern int filter_n[FILTER_VARIABLE_COUNT]; /* filter variables */
618 extern int filter_sn[FILTER_VARIABLE_COUNT]; /* variables set by system filter */
619 extern int filter_test; /* Filter test type */
620 extern uschar *filter_test_sfile; /* System filter test file */
621 extern uschar *filter_test_ufile; /* User filter test file */
622 extern uschar *filter_thisaddress; /* For address looping */
623 extern int finduser_retries; /* Retry count for getpwnam() */
624 extern uid_t fixed_never_users[]; /* Can't be overridden */
625 extern uschar *freeze_tell; /* Message on (some) freezings */
626 extern uschar *freeze_tell_config; /* The configured setting */
627 extern uschar *fudged_queue_times; /* For use in test harness */
629 extern uschar *gecos_name; /* To be expanded when pattern matches */
630 extern uschar *gecos_pattern; /* Pattern to match */
631 extern rewrite_rule *global_rewrite_rules; /* Chain of rewriting rules */
633 extern volatile sig_atomic_t had_command_timeout; /* Alarm sighandler called */
634 extern volatile sig_atomic_t had_command_sigterm; /* TERM sighandler called */
635 extern volatile sig_atomic_t had_data_timeout; /* Alarm sighandler called */
636 extern volatile sig_atomic_t had_data_sigint; /* TERM/INT sighandler called */
637 extern int header_insert_maxlen; /* Max for inserting headers */
638 extern int header_maxsize; /* Max total length for header */
639 extern int header_line_maxsize; /* Max for an individual line */
640 extern header_name header_names[]; /* Table of header names */
641 extern int header_names_size; /* Number of entries */
642 extern uschar *helo_accept_junk_hosts; /* Allowed to use junk arg */
643 extern uschar *helo_allow_chars; /* Rogue chars to allow in HELO/EHLO */
644 extern uschar *helo_lookup_domains; /* If these given, lookup host name */
645 extern uschar *helo_try_verify_hosts; /* Soft check HELO argument for these */
646 extern uschar *helo_verify_hosts; /* Hard check HELO argument for these */
647 extern const uschar *hex_digits; /* Used in several places */
648 extern uschar *hold_domains; /* Hold up deliveries to these */
649 extern uschar *host_data; /* Obtained from lookup in ACL */
650 extern uschar *host_lookup; /* For which IP addresses are always looked up */
651 extern BOOL host_lookup_deferred; /* TRUE if lookup deferred */
652 extern BOOL host_lookup_failed; /* TRUE if lookup failed */
653 extern uschar *host_lookup_order; /* Order of host lookup types */
654 extern uschar *host_lookup_msg; /* Text for why it failed */
655 extern int host_number; /* For sharing spools */
656 extern uschar *host_number_string; /* For expanding */
657 extern uschar *hosts_require_helo; /* check for HELO/EHLO before MAIL */
658 extern uschar *host_reject_connection; /* Reject these hosts */
659 extern tree_node *hostlist_anchor; /* Tree of defined host lists */
660 extern int hostlist_count; /* Number defined */
661 extern uschar *hosts_connection_nolog; /* Limits the logging option */
662 extern uschar *hosts_treat_as_local; /* For routing */
664 extern int ignore_bounce_errors_after; /* Keep them for this time. */
665 extern BOOL ignore_fromline_local; /* Local SMTP ignore fromline */
666 extern uschar *ignore_fromline_hosts; /* Hosts permitted to send "From " */
667 extern int inetd_wait_timeout; /* Timeout for inetd wait mode */
668 extern uschar *initial_cwd; /* The directory we where in at startup */
669 extern uschar *iterate_item; /* Item from iterate list */
671 extern int journal_fd; /* Fd for journal file */
673 extern uschar *keep_environment; /* Whitelist for environment variables */
674 extern int keep_malformed; /* Time to keep malformed messages */
676 extern uschar *eldap_dn; /* Where LDAP DNs are left */
677 #ifdef EXPERIMENTAL_ESMTP_LIMITS
678 extern uschar *limits_advertise_hosts; /* for banner/EHLO pipelining */
680 extern int load_average; /* Most recently read load average */
681 extern BOOL local_from_check; /* For adding Sender: (global value) */
682 extern uschar *local_from_prefix; /* Permitted prefixes */
683 extern uschar *local_from_suffix; /* Permitted suffixes */
684 extern uschar *local_interfaces; /* For forcing specific interfaces */
685 #ifdef HAVE_LOCAL_SCAN
686 extern uschar *local_scan_data; /* Text returned by local_scan() */
687 extern optionlist local_scan_options[];/* Option list for local_scan() */
688 extern int local_scan_options_count; /* Size of the list */
689 extern int local_scan_timeout; /* Timeout for local_scan() */
691 extern BOOL local_sender_retain; /* Retain Sender: (with no From: check) */
692 extern gid_t local_user_gid; /* As it says; may be set in routers */
693 extern uid_t local_user_uid; /* As it says; may be set in routers */
694 extern tree_node *localpartlist_anchor;/* Tree of defined localpart lists */
695 extern int localpartlist_count; /* Number defined */
696 extern uschar *log_buffer; /* For constructing log entries */
697 extern int log_default[]; /* Initialization list for log_selector */
698 extern uschar *log_file_path; /* If unset, use default */
699 extern int log_notall[]; /* Log options excluded from +all */
700 extern bit_table log_options[]; /* Table of options */
701 extern int log_options_count; /* Size of table */
702 extern int log_reject_target; /* Target log for ACL rejections */
703 extern unsigned int log_selector[]; /* Bit map of logging options */
704 extern uschar *log_selector_string; /* As supplied in the config */
705 extern FILE *log_stderr; /* Copy of stderr for log use, or NULL */
706 extern BOOL log_timezone; /* TRUE to include the timezone in log lines */
707 extern uschar *login_sender_address; /* The actual sender address */
708 extern lookup_info **lookup_list; /* Array of pointers to available lookups */
709 extern int lookup_list_count; /* Number of entries in the list */
710 extern uschar *lookup_dnssec_authenticated; /* AD status of dns lookup */
711 extern int lookup_open_max; /* Max lookup files to cache */
712 extern uschar *lookup_value; /* Value looked up from file */
714 extern macro_item *macros; /* Configuration macros */
715 extern macro_item *macros_user; /* Non-builtin configuration macros */
716 extern macro_item *mlast; /* Last item in macro list */
717 extern uschar *mailstore_basename; /* For mailstore deliveries */
718 #ifdef WITH_CONTENT_SCAN
719 extern uschar *malware_name; /* Name of virus or malware ("W32/Klez-H") */
721 extern int max_received_linelength;/* What it says */
722 extern int max_username_length; /* For systems with broken getpwnam() */
723 extern int message_age; /* In seconds */
724 extern uschar *message_body; /* Start of message body for filter */
725 extern uschar *message_body_end; /* End of message body for filter */
726 extern BOOL message_body_newlines; /* FALSE => remove newlines */
727 extern int message_body_size; /* Sic */
728 extern int message_body_visible; /* Amount visible in message_body */
729 extern int message_ended; /* State of message reading and how ended */
730 extern uschar *message_headers; /* When built */
731 extern uschar message_id_option[]; /* -E<message-id> for use as option */
732 extern uschar *message_id_external; /* External form of following */
733 extern uschar *message_id_domain; /* Expanded to form domain-part of message_id */
734 extern uschar *message_id_text; /* Expanded to form message_id */
735 extern int message_linecount; /* As it says */
736 extern BOOL message_logs; /* TRUE to write message logs */
737 extern int message_size; /* Size of message */
738 extern uschar *message_size_limit; /* As it says */
740 extern BOOL message_smtputf8; /* Internationalized mail handling */
741 extern int message_utf8_downconvert; /* convert from utf8 */
742 const extern pcre2_code *regex_UTF8; /* For recognizing SMTPUTF8 settings */
744 extern uschar message_subdir[]; /* Subdirectory for messages */
745 extern uschar *message_reference; /* Reference for error messages */
747 /* MIME ACL expandables */
748 #ifdef WITH_CONTENT_SCAN
749 extern int mime_anomaly_level;
750 extern const uschar *mime_anomaly_text;
751 extern uschar *mime_boundary;
752 extern uschar *mime_charset;
753 extern uschar *mime_content_description;
754 extern uschar *mime_content_disposition;
755 extern uschar *mime_content_id;
756 extern unsigned int mime_content_size;
757 extern uschar *mime_content_transfer_encoding;
758 extern uschar *mime_content_type;
759 extern uschar *mime_decoded_filename;
760 extern uschar *mime_filename;
761 extern int mime_is_multipart;
762 extern int mime_is_coverletter;
763 extern int mime_is_rfc822;
764 extern int mime_part_count;
767 extern BOOL mua_wrapper; /* TRUE when Exim is wrapping an MUA */
769 extern uid_t *never_users; /* List of uids never to be used */
770 extern uschar *notifier_socket; /* Name for daemon notifier unix-socket */
772 extern const int on; /* For setsockopt */
773 extern const int off;
775 extern optionlist optionlist_auths[]; /* These option lists are made */
776 extern int optionlist_auths_size; /* global so that readconf can */
777 extern optionlist optionlist_routers[]; /* see them for printing out */
778 extern int optionlist_routers_size; /* the options. */
779 extern optionlist optionlist_transports[];
780 extern int optionlist_transports_size;
782 extern uid_t original_euid; /* Original effective uid */
783 extern gid_t originator_gid; /* Gid of whoever wrote spool file */
784 extern uschar *originator_login; /* Login of same */
785 extern uschar *originator_name; /* Full name of same */
786 extern uid_t originator_uid; /* Uid of ditto */
787 extern uschar *override_local_interfaces; /* Value of -oX argument */
788 extern uschar *override_pid_file_path; /* Value of -oP argument */
790 extern pcre2_general_context * pcre_gen_ctx; /* pcre memory management */
791 extern pcre2_compile_context * pcre_cmp_ctx;
792 extern pcre2_match_context * pcre_mtc_ctx;
794 extern uschar *percent_hack_domains; /* Local domains for which '% operates */
795 extern uschar *pid_file_path; /* For writing daemon pids */
796 #ifndef DISABLE_PIPE_CONNECT
797 extern uschar *pipe_connect_advertise_hosts; /* for banner/EHLO pipelining */
799 extern uschar *pipelining_advertise_hosts; /* As it says */
801 extern BOOL prdr_enable; /* As it says */
802 extern BOOL prdr_requested; /* Connecting mail server wants PRDR */
804 extern BOOL preserve_message_logs; /* Save msglog files */
805 extern uschar *primary_hostname; /* Primary name of this computer */
806 extern BOOL print_topbitchars; /* Topbit chars are printing chars */
807 extern uschar *process_info; /* For SIGUSR1 output */
808 extern int process_info_len;
809 extern uschar *process_log_path; /* Alternate path */
810 extern const uschar *process_purpose; /* for debug output */
811 extern BOOL prod_requires_admin; /* TRUE if prodding requires admin */
813 #if defined(SUPPORT_PROXY) || defined(SUPPORT_SOCKS)
814 extern uschar *hosts_proxy; /* Hostlist which (require) use proxy protocol */
815 extern uschar *proxy_external_address; /* IP of remote interface of proxy */
816 extern int proxy_external_port; /* Port on remote interface of proxy */
817 extern uschar *proxy_local_address; /* IP of local interface of proxy */
818 extern int proxy_local_port; /* Port on local interface of proxy */
819 extern int proxy_protocol_timeout; /* Timeout for proxy negotiation */
820 extern BOOL proxy_session; /* TRUE if receiving mail from valid proxy */
823 extern uschar *prvscheck_address; /* Set during prvscheck expansion item */
824 extern uschar *prvscheck_keynum; /* Set during prvscheck expansion item */
825 extern uschar *prvscheck_result; /* Set during prvscheck expansion item */
827 extern const uschar *qualify_domain_recipient; /* Domain to qualify recipients with */
828 extern uschar *qualify_domain_sender; /* Domain to qualify senders with */
829 extern uschar *queue_domains; /* Queue these domains */
830 #ifndef DISABLE_QUEUE_RAMP
831 extern BOOL queue_fast_ramp; /* 2-phase queue-run overlap */
833 extern BOOL queue_list_requires_admin; /* TRUE if -bp requires admin */
834 /* immediate children */
835 extern pid_t queue_run_pid; /* PID of the queue running process or 0 */
836 extern int queue_run_pipe; /* Pipe for synchronizing */
837 extern int queue_interval; /* Queue running interval */
838 extern uschar *queue_name; /* Name of queue, if nondefault spooling */
839 extern uschar *queue_name_dest; /* Destination queue, for moving messages */
840 extern BOOL queue_only; /* TRUE to disable immediate delivery */
841 extern int queue_only_load; /* Max load before auto-queue */
842 extern BOOL queue_only_load_latch; /* Latch queue_only_load TRUE */
843 extern uschar *queue_only_file; /* Queue if file exists/not-exists */
844 extern BOOL queue_only_override; /* Allow override from command line */
845 extern BOOL queue_run_in_order; /* As opposed to random */
846 extern uschar *queue_run_max; /* Max queue runners */
847 extern unsigned queue_size; /* items in queue */
848 extern time_t queue_size_next; /* next time to evaluate queue_size */
849 extern uschar *queue_smtp_domains; /* Ditto, for these domains */
851 extern unsigned int random_seed; /* Seed for random numbers */
852 extern tree_node *ratelimiters_cmd; /* Results of command ratelimit checks */
853 extern tree_node *ratelimiters_conn; /* Results of connection ratelimit checks */
854 extern tree_node *ratelimiters_mail; /* Results of per-mail ratelimit checks */
855 extern uschar *raw_active_hostname; /* Pre-expansion */
856 extern uschar *raw_sender; /* Before rewriting */
857 extern uschar **raw_recipients; /* Before rewriting */
858 extern int raw_recipients_count;
859 extern const uschar * rc_names[]; /* Mostly for debug output */
860 extern int rcpt_count; /* Count of RCPT commands in a message */
861 extern int rcpt_fail_count; /* Those that got 5xx */
862 extern int rcpt_defer_count; /* Those that got 4xx */
863 extern gid_t real_gid; /* Real gid */
864 extern uid_t real_uid; /* Real user running program */
865 extern int receive_linecount; /* Mainly for BSMTP errors */
866 extern int receive_messagecount; /* Mainly for BSMTP errors */
867 extern int receive_timeout; /* For non-SMTP acceptance */
868 extern int received_count; /* Count of Received: headers */
869 extern uschar *received_for; /* For "for" field */
870 extern uschar *received_header_text; /* Definition of Received: header */
871 extern int received_headers_max; /* Max count of Received: headers */
872 extern struct timeval received_time; /* Time the message started to be received */
873 extern struct timeval received_time_complete; /* Time the message completed reception */
874 extern uschar *recipient_data; /* lookup data for recipients */
875 extern uschar *recipient_unqualified_hosts; /* Permitted unqualified recipients */
876 extern uschar *recipient_verify_failure; /* What went wrong */
877 extern int recipients_list_max; /* Maximum number fitting in list */
878 extern int recipients_max; /* Max permitted */
879 extern BOOL recipients_max_reject; /* If TRUE, reject whole message */
880 extern const pcre2_code *regex_AUTH; /* For recognizing AUTH settings */
881 extern const pcre2_code *regex_check_dns_names; /* For DNS name checking */
882 extern const pcre2_code *regex_From; /* For recognizing "From_" lines */
883 extern const pcre2_code *regex_CHUNKING; /* For recognizing CHUNKING (RFC 3030) */
884 extern const pcre2_code *regex_IGNOREQUOTA; /* For recognizing IGNOREQUOTA (LMTP) */
885 #ifdef EXPERIMENTAL_ESMTP_LIMITS
886 extern const pcre2_code *regex_LIMITS; /* For recognizing LIMITS */
888 extern const pcre2_code *regex_PIPELINING; /* For recognizing PIPELINING */
889 extern const pcre2_code *regex_SIZE; /* For recognizing SIZE settings */
890 #ifndef DISABLE_PIPE_CONNECT
891 extern const pcre2_code *regex_EARLY_PIPE; /* For recognizing PIPE_CONNCT */
893 extern const pcre2_code *regex_ismsgid; /* Compiled r.e. for message ID */
894 extern const pcre2_code *regex_smtp_code; /* For recognizing SMTP codes */
895 extern const uschar *regex_vars[]; /* $regexN variables */
896 #ifdef WHITELIST_D_MACROS
897 extern const pcre2_code *regex_whitelisted_macro; /* For -D macro values */
899 #ifdef WITH_CONTENT_SCAN
900 extern uschar *regex_match_string; /* regex that matched a line (regex ACL condition) */
902 extern int remote_delivery_count; /* Number of remote addresses */
903 extern int remote_max_parallel; /* Maximum parallel delivery */
904 extern uschar *remote_sort_domains; /* Remote domain sorting order */
905 extern retry_config *retries; /* Chain of retry config information */
906 extern int retry_data_expire; /* When to expire retry data */
907 extern int retry_interval_max; /* Absolute maximum */
908 extern int retry_maximum_timeout; /* The maximum timeout */
909 extern uschar *return_path; /* Return path for a message */
910 extern BOOL return_path_remove; /* Remove return-path headers */
911 extern int rewrite_existflags; /* Indicate which headers have rewrites */
912 extern uschar *rfc1413_hosts; /* RFC hosts */
913 extern int rfc1413_query_timeout; /* Timeout on RFC 1413 calls */
914 /* extern BOOL rfc821_domains; */ /* If set, syntax is 821, not 822 => being abolished */
915 extern uid_t root_gid; /* The gid for root */
916 extern uid_t root_uid; /* The uid for root */
917 extern router_info routers_available[];/* Vector of available routers */
918 extern router_instance *routers; /* Chain of instantiated routers */
919 extern router_instance router_defaults;/* Default values */
920 extern uschar *router_name; /* Name of router last started */
921 extern tree_node *router_var; /* Variables set by router */
922 extern ip_address_item *running_interfaces; /* Host's running interfaces */
923 extern uschar *running_status; /* Flag string for testing */
924 extern int runrc; /* rc from ${run} */
926 extern uschar *search_error_message; /* Details of lookup problem */
927 extern uschar *self_hostname; /* Self host after routing->directors */
928 extern unsigned int sender_address_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for sender */
929 extern uschar *sender_address_data; /* address_data from sender verify */
930 extern uschar *sender_address_unrewritten; /* Set if rewritten by verify */
931 extern uschar *sender_data; /* lookup result for senders */
932 extern unsigned int sender_domain_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for sender domain */
933 extern uschar *sender_fullhost; /* Sender host name + address */
934 extern BOOL sender_helo_dnssec; /* True if HELO verify used DNS and was DNSSEC */
935 extern uschar *sender_helo_name; /* Host name from HELO/EHLO */
936 extern uschar **sender_host_aliases; /* Points to list of alias names */
937 extern uschar *sender_host_auth_pubname; /* Public-name of authentication method */
938 extern unsigned int sender_host_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for incoming host */
939 extern BOOL sender_host_dnssec; /* true if sender_host_name verified in DNSSEC */
940 extern uschar *sender_ident; /* Sender identity via RFC 1413 */
941 extern uschar *sender_rate; /* Sender rate computed by ACL */
942 extern uschar *sender_rate_limit; /* Configured rate limit */
943 extern uschar *sender_rate_period; /* Configured smoothing period */
944 extern uschar *sender_rcvhost; /* Host data for Received: */
945 extern uschar *sender_unqualified_hosts; /* Permitted unqualified senders */
946 extern uschar *sender_verify_failure; /* What went wrong */
947 extern address_item *sender_verified_list; /* Saved chain of sender verifies */
948 extern address_item *sender_verified_failed; /* The one that caused denial */
949 extern uschar *sending_ip_address; /* Address of outgoing (SMTP) interface */
950 extern int sending_port; /* Port of outgoing interface */
951 extern SIGNAL_BOOL sigalrm_seen; /* Flag for sigalrm_handler */
952 extern const uschar *sigalarm_setter; /* For debug, set to callpoint of alarm() */
953 extern uschar **sighup_argv; /* Args for re-execing after SIGHUP */
954 extern int slow_lookup_log; /* Log DNS lookups taking longer than N millisecs */
955 extern int smtp_accept_count; /* Count of connections */
956 extern BOOL smtp_accept_keepalive; /* Set keepalive on incoming */
957 extern int smtp_accept_max; /* Max SMTP connections */
958 extern int smtp_accept_max_nonmail;/* Max non-mail commands in one con */
959 extern uschar *smtp_accept_max_nonmail_hosts; /* Limit non-mail cmds from these hosts */
960 extern uschar *smtp_accept_max_per_connection; /* Max msgs per connection */
961 extern uschar *smtp_accept_max_per_host; /* Max SMTP cons from one IP addr */
962 extern int smtp_accept_queue; /* Queue after so many connections */
963 extern int smtp_accept_queue_per_connection; /* Queue after so many msgs */
964 extern int smtp_accept_reserve; /* Reserve these SMTP connections */
965 extern uschar *smtp_active_hostname; /* Hostname for this message */
966 extern int smtp_backlog_monitor; /* listen backlog level to log */
967 extern uschar *smtp_banner; /* Banner string (to be expanded) */
968 extern BOOL smtp_check_spool_space; /* TRUE to check SMTP SIZE value */
969 extern int smtp_ch_index; /* Index in smtp_connection_had */
970 extern uschar *smtp_cmd_argument; /* For all SMTP commands */
971 extern uschar *smtp_cmd_buffer; /* SMTP command buffer */
972 extern struct timeval smtp_connection_start; /* Start time of SMTP connection */
973 extern uschar smtp_connection_had[]; /* Recent SMTP commands */
974 extern int smtp_connect_backlog; /* Max backlog permitted */
975 extern double smtp_delay_mail; /* Current MAIL delay */
976 extern double smtp_delay_rcpt; /* Current RCPT delay */
977 extern BOOL smtp_enforce_sync; /* Enforce sync rules */
978 extern uschar *smtp_etrn_command; /* Command to run */
979 extern BOOL smtp_etrn_serialize; /* Only one at once */
980 extern FILE *smtp_in; /* Incoming SMTP input file */
981 extern int smtp_listen_backlog; /* Current listener socket backlog, if monitored */
982 extern int smtp_load_reserve; /* Only from reserved if load > this */
983 extern int smtp_mailcmd_count; /* Count of MAIL commands */
984 extern int smtp_mailcmd_max; /* Limit for MAIL commands */
985 extern int smtp_max_synprot_errors;/* Max syntax/protocol errors */
986 extern int smtp_max_unknown_commands; /* As it says */
987 extern uschar *smtp_names[]; /* decode for command codes */
988 extern uschar *smtp_notquit_reason; /* Global for disconnect reason */
989 extern FILE *smtp_out; /* Incoming SMTP output file */
990 extern uschar *smtp_ratelimit_hosts; /* Rate limit these hosts */
991 extern uschar *smtp_ratelimit_mail; /* Parameters for MAIL limiting */
992 extern uschar *smtp_ratelimit_rcpt; /* Parameters for RCPT limiting */
993 extern uschar *smtp_read_error; /* Message for SMTP input error */
994 extern int smtp_receive_timeout; /* Applies to each received line */
995 extern uschar *smtp_receive_timeout_s; /* ... expandable version */
996 extern uschar *smtp_reserve_hosts; /* Hosts for reserved slots */
997 extern BOOL smtp_return_error_details; /* TRUE to return full info */
998 extern int smtp_rlm_base; /* Base interval for MAIL rate limit */
999 extern double smtp_rlm_factor; /* Factor for MAIL rate limit */
1000 extern int smtp_rlm_limit; /* Max delay */
1001 extern int smtp_rlm_threshold; /* Threshold for RCPT rate limit */
1002 extern int smtp_rlr_base; /* Base interval for RCPT rate limit */
1003 extern double smtp_rlr_factor; /* Factor for RCPT rate limit */
1004 extern int smtp_rlr_limit; /* Max delay */
1005 extern int smtp_rlr_threshold; /* Threshold for RCPT rate limit */
1006 extern unsigned smtp_peer_options; /* Global flags for passed connections */
1007 extern unsigned smtp_peer_options_wrap; /* stacked version hidden by TLS */
1009 extern uschar *smtputf8_advertise_hosts; /* ingress control */
1012 #ifdef WITH_CONTENT_SCAN
1013 extern uschar *spamd_address; /* address for the spamassassin daemon */
1014 extern uschar *spam_bar; /* the spam "bar" (textual representation of spam_score) */
1015 extern uschar *spam_report; /* the spamd report (multiline) */
1016 extern uschar *spam_action; /* the spamd recommended-action */
1017 extern uschar *spam_score; /* the spam score (float) */
1018 extern uschar *spam_score_int; /* spam_score * 10 (int) */
1021 extern uschar *spf_guess; /* spf best-guess record */
1022 extern uschar *spf_header_comment; /* spf header comment */
1023 extern uschar *spf_received; /* Received-SPF: header */
1024 extern uschar *spf_result; /* spf result in string form */
1025 extern BOOL spf_result_guessed; /* spf result is of best-guess operation */
1026 extern uschar *spf_smtp_comment; /* spf comment to include in SMTP reply */
1027 extern uschar *spf_smtp_comment_template;
1028 /* template to construct the spf comment by libspf2 */
1030 extern BOOL split_spool_directory; /* TRUE to use multiple subdirs */
1031 extern FILE *spool_data_file; /* handle for -D file */
1032 extern uschar *spool_directory; /* Name of spool directory */
1033 extern BOOL spool_wireformat; /* can write wireformat -D files */
1035 extern uschar *srs_recipient; /* SRS recipient */
1037 extern BOOL strict_acl_vars; /* ACL variables have to be set before being used */
1038 extern int string_datestamp_offset;/* After insertion by string_format */
1039 extern int string_datestamp_length;/* After insertion by string_format */
1040 extern int string_datestamp_type; /* After insertion by string_format */
1041 extern BOOL strip_excess_angle_brackets; /* Surrounding route-addrs */
1042 extern BOOL strip_trailing_dot; /* Remove dots at ends of domains */
1043 extern const uschar *submission_domain;/* Domain for submission mode */
1044 extern const uschar *submission_name; /* User name set from ACL */
1045 extern BOOL syslog_duplication; /* FALSE => no duplicate logging */
1046 extern int syslog_facility; /* As defined by Syslog.h */
1047 extern BOOL syslog_pid; /* TRUE if PID on syslogs */
1048 extern uschar *syslog_processname; /* 'ident' param to openlog() */
1049 extern BOOL syslog_timestamp; /* TRUE if time on syslogs */
1050 extern uschar *system_filter; /* Name of system filter file */
1052 extern uschar *system_filter_directory_transport; /* Transports for the */
1053 extern uschar *system_filter_file_transport; /* system filter */
1054 extern uschar *system_filter_pipe_transport;
1055 extern uschar *system_filter_reply_transport;
1057 extern gid_t system_filter_gid; /* Gid for running system filter */
1058 extern BOOL system_filter_gid_set; /* TRUE if gid set */
1059 extern uid_t system_filter_uid; /* Uid for running system filter */
1060 extern BOOL system_filter_uid_set; /* TRUE if uid set */
1062 extern blob tcp_fastopen_nodata; /* for zero-data TFO connect requests */
1063 extern BOOL tcp_nodelay; /* Controls TCP_NODELAY on daemon */
1064 extern tfo_state_t tcp_out_fastopen; /* TCP fast open */
1065 #ifdef USE_TCP_WRAPPERS
1066 extern uschar *tcp_wrappers_daemon_name; /* tcpwrappers daemon lookup name */
1068 extern int test_harness_load_avg; /* For use when testing */
1069 extern int thismessage_size_limit; /* Limit for this message */
1070 extern int timeout_frozen_after; /* Max time to keep frozen messages */
1071 #ifdef MEASURE_TIMING
1072 extern struct timeval timestamp_startup; /* For development measurements */
1075 extern uschar *transport_name; /* Name of transport last started */
1076 extern int transport_count; /* Count of bytes transported */
1077 extern int transport_newlines; /* Accurate count of number of newline chars transported */
1078 extern const uschar **transport_filter_argv; /* For on-the-fly filtering */
1079 extern int transport_filter_timeout; /* Timeout for same */
1081 extern transport_info transports_available[]; /* Vector of available transports */
1082 extern transport_instance *transports; /* Chain of instantiated transports */
1083 extern transport_instance transport_defaults; /* Default values */
1085 extern int transport_write_timeout;/* Set to time out individual writes */
1087 extern tree_node *tree_dns_fails; /* Tree of DNS lookup failures */
1088 extern tree_node *tree_duplicates; /* Tree of duplicate addresses */
1089 extern tree_node *tree_nonrecipients; /* Tree of nonrecipient addresses */
1090 extern tree_node *tree_unusable; /* Tree of unusable addresses */
1092 extern gid_t *trusted_groups; /* List of trusted groups */
1093 extern uid_t *trusted_users; /* List of trusted users */
1094 extern uschar *timezone_string; /* Required timezone setting */
1096 extern uschar *unknown_login; /* To use when login id unknown */
1097 extern uschar *unknown_username; /* Ditto */
1098 extern uschar *untrusted_set_sender; /* Let untrusted users set these senders */
1099 extern uschar *uucp_from_pattern; /* For recognizing "From " lines */
1100 extern uschar *uucp_from_sender; /* For building the sender */
1102 extern uschar *warn_message_file; /* Template for warning messages */
1103 extern uschar *warnmsg_delay; /* String form of delay time */
1104 extern uschar *warnmsg_recipients; /* Recipients of warning message */
1105 extern BOOL write_rejectlog; /* Control of reject logging */
1107 extern uschar *verify_mode; /* Running a router in verify mode */
1108 extern uschar *version_copyright; /* Copyright notice */
1109 extern uschar *version_date; /* Date of compilation */
1110 extern uschar *version_cnumber; /* Compile number */
1111 extern uschar *version_string; /* Version string */
1113 extern int warning_count; /* Delay warnings sent for this msg */
1115 /* End of globals.h */
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