src/globals.h

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2018 */
   6 /* See the file NOTICE for conditions of use and distribution. */
   7
   8 /* Almost all the global variables are defined together in this one header, so
   9 that they are easy to find. However, those that are visible during the
  10 compilation of the local_scan() function are defined separately in the
  11 local_scan.h header file. */
  12
  13 /* First put any specials that are required for some operating systems. */
  14
  15 #ifdef NEED_H_ERRNO
  16 extern int h_errno;
  17 #endif
  18
  19 /* We need to be careful about width of int and atomicity in signal handlers,
  20 especially with the rise of 64-bit systems breaking older assumptions.  But
  21 sig_atomic_t comes from signal.h so can't go into mytypes.h without including
  22 signal support in local_scan, which seems precipitous. */
  23 typedef volatile sig_atomic_t SIGNAL_BOOL;
  24
  25 /* Now things that are present only when configured. */
  26
  27 #ifdef EXIM_PERL
  28 extern uschar *opt_perl_startup;       /* Startup code for Perl interpreter */
  29 extern BOOL    opt_perl_at_start;      /* Start Perl interpreter at start */
  30 extern BOOL    opt_perl_started;       /* Set once interpreter started */
  31 extern BOOL    opt_perl_taintmode;     /* Enable taint mode in Perl */
  32 #endif
  33
  34 #ifdef EXPAND_DLFUNC
  35 extern tree_node *dlobj_anchor;        /* Tree of dynamically-loaded objects */
  36 #endif
  37
  38 #ifdef LOOKUP_IBASE
  39 extern uschar *ibase_servers;
  40 #endif
  41
  42 #ifdef LOOKUP_LDAP
  43 extern uschar *eldap_ca_cert_dir;      /* Directory with CA certificates */
  44 extern uschar *eldap_ca_cert_file;     /* CA certificate file */
  45 extern uschar *eldap_cert_file;        /* Certificate file */
  46 extern uschar *eldap_cert_key;         /* Certificate key file */
  47 extern uschar *eldap_cipher_suite;     /* Allowed cipher suite */
  48 extern uschar *eldap_default_servers;  /* List of default servers */
  49 extern uschar *eldap_require_cert;     /* Peer certificate checking strategy */
  50 extern BOOL    eldap_start_tls;        /* Use STARTTLS */
  51 extern int     eldap_version;          /* LDAP version */
  52 #endif
  53
  54 #ifdef LOOKUP_MYSQL
  55 extern uschar *mysql_servers;          /* List of servers and connect info */
  56 #endif
  57
  58 #ifdef LOOKUP_ORACLE
  59 extern uschar *oracle_servers;         /* List of servers and connect info */
  60 #endif
  61
  62 #ifdef LOOKUP_PGSQL
  63 extern uschar *pgsql_servers;          /* List of servers and connect info */
  64 #endif
  65
  66 #ifdef LOOKUP_REDIS
  67 extern uschar *redis_servers;          /* List of servers and connect info */
  68 #endif
  69
  70 #ifdef LOOKUP_SQLITE
  71 extern int     sqlite_lock_timeout;    /* Internal lock waiting timeout */
  72 #endif
  73
  74 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
  75 extern BOOL    move_frozen_messages;   /* Get them out of the normal directory */
  76 #endif
  77
  78 /* These variables are outside the #ifdef because it keeps the code less
  79 cluttered in several places (e.g. during logging) if we can always refer to
  80 them. Also, the tls_ variables are now always visible. */
  81
  82 typedef struct {
  83   client_conn_ctx active;     /* fd/socket when in a TLS session, and ptr to TLS context */
  84   int     bits;               /* bits used in TLS session */
  85   BOOL    certificate_verified; /* Client certificate verified */
  86 #ifdef SUPPORT_DANE
  87   BOOL    dane_verified;        /* ... via DANE */
  88   int     tlsa_usage;         /* TLSA record(s) usage */
  89 #endif
  90   uschar *cipher;             /* Cipher used */
  91   BOOL    on_connect;         /* For older MTAs that don't STARTTLS */
  92   uschar *on_connect_ports;   /* Ports always tls-on-connect */
  93   void   *ourcert;            /* Certificate we presented, binary */
  94   void   *peercert;           /* Certificate of peer, binary */
  95   uschar *peerdn;             /* DN from peer */
  96   uschar *sni;                /* Server Name Indication */
  97   enum {
  98     OCSP_NOT_REQ=0,             /* not requested */
  99     OCSP_NOT_RESP,              /* no response to request */
 100     OCSP_VFY_NOT_TRIED,         /* response not verified */
 101     OCSP_FAILED,                /* verify failed */
 102     OCSP_VFIED                  /* verified */
 103     }     ocsp;               /* Stapled OCSP status */
 104 } tls_support;
 105 extern tls_support tls_in;
 106 extern tls_support tls_out;
 107
 108 #ifdef SUPPORT_TLS
 109 extern BOOL    gnutls_compat_mode;     /* Less security, more compatibility */
 110 extern BOOL    gnutls_allow_auto_pkcs11; /* Let GnuTLS autoload PKCS11 modules */
 111 extern uschar *openssl_options;        /* OpenSSL compatibility options */
 112 extern const pcre *regex_STARTTLS;     /* For recognizing STARTTLS settings */
 113 extern uschar *tls_certificate;        /* Certificate file */
 114 extern uschar *tls_channelbinding_b64; /* string of base64 channel binding */
 115 extern uschar *tls_crl;                /* CRL File */
 116 extern int     tls_dh_max_bits;        /* don't accept higher lib suggestions */
 117 extern uschar *tls_dhparam;            /* DH param file */
 118 extern uschar *tls_eccurve;            /* EC curve */
 119 # ifndef DISABLE_OCSP
 120 extern uschar *tls_ocsp_file;          /* OCSP stapling proof file */
 121 # endif
 122 extern uschar *tls_privatekey;         /* Private key file */
 123 # ifdef EXPERIMENTAL_REQUIRETLS
 124 extern uschar  tls_requiretls;         /* REQUIRETLS active for this message */
 125 extern uschar *tls_advertise_requiretls; /* hosts for which REQUIRETLS adv */
 126 extern const pcre *regex_REQUIRETLS;   /* for recognising the command */
 127 # endif
 128 extern BOOL    tls_remember_esmtp;     /* For YAEB */
 129 extern uschar *tls_require_ciphers;    /* So some can be avoided */
 130 extern uschar *tls_try_verify_hosts;   /* Optional client verification */
 131 extern uschar *tls_verify_certificates;/* Path for certificates to check */
 132 extern uschar *tls_verify_hosts;       /* Mandatory client verification */
 133 #endif
 134 extern uschar *tls_advertise_hosts;    /* host for which TLS is advertised */
 135
 136 extern uschar  *dsn_envid;             /* DSN envid string */
 137 extern int      dsn_ret;               /* DSN ret type*/
 138 extern const pcre  *regex_DSN;         /* For recognizing DSN settings */
 139 extern uschar  *dsn_advertise_hosts;   /* host for which TLS is advertised */
 140
 141 /* Input-reading functions for messages, so we can use special ones for
 142 incoming TCP/IP. */
 143
 144 extern int (*lwr_receive_getc)(unsigned);
 145 extern uschar * (*lwr_receive_getbuf)(unsigned *);
 146 extern int (*lwr_receive_ungetc)(int);
 147 extern int (*receive_getc)(unsigned);
 148 extern uschar * (*receive_getbuf)(unsigned *);
 149 extern void (*receive_get_cache)(void);
 150 extern int (*receive_ungetc)(int);
 151 extern int (*receive_feof)(void);
 152 extern int (*receive_ferror)(void);
 153 extern BOOL (*receive_smtp_buffered)(void);
 154
 155
 156 /* For clearing, saving, restoring address expansion variables. We have to have
 157 the size of this vector set explicitly, because it is referenced from more than
 158 one module. */
 159
 160 extern const uschar **address_expansions[ADDRESS_EXPANSIONS_COUNT];
 161
 162 /* Flags for which we don't need an address ever so can use a bitfield */
 163
 164 extern struct global_flags {
 165  BOOL   acl_temp_details                :1; /* TRUE to give details for 4xx error */
 166  BOOL   active_local_from_check         :1; /* For adding Sender: (switchable) */
 167  BOOL   active_local_sender_retain      :1; /* For keeping Sender: (switchable) */
 168  BOOL   address_test_mode               :1; /* True for -bt */
 169  BOOL   admin_user                      :1; /* True if caller can do admin */
 170  BOOL   allow_auth_unadvertised         :1; /* As it says */
 171  BOOL   allow_unqualified_recipient     :1;    /* For local messages */ /* As it says */
 172  BOOL   allow_unqualified_sender        :1;       /* Reset for SMTP */ /* Ditto */
 173  BOOL   authentication_local            :1; /* TRUE if non-smtp (implicit authentication) */
 174
 175  BOOL   background_daemon               :1; /* Set FALSE to keep in foreground */
 176
 177  BOOL   chunking_offered                :1;
 178  BOOL   config_changed                  :1; /* True if -C used */
 179  BOOL   continue_more                   :1; /* Flag more addresses waiting */
 180
 181  BOOL   daemon_listen                   :1; /* True if listening required */
 182  BOOL   debug_daemon                    :1; /* Debug the daemon process only */
 183  BOOL   deliver_firsttime               :1; /* True for first delivery attempt */
 184  BOOL   deliver_force                   :1; /* TRUE if delivery was forced */
 185  BOOL   deliver_freeze                  :1; /* TRUE if delivery is frozen */
 186  BOOL   deliver_force_thaw              :1; /* TRUE to force thaw in queue run */
 187  BOOL   deliver_manual_thaw             :1; /* TRUE if manually thawed */
 188  BOOL   deliver_selectstring_regex      :1; /* String is regex */
 189  BOOL   deliver_selectstring_sender_regex :1; /* String is regex */
 190  BOOL   disable_callout_flush           :1; /* Don't flush before callouts */
 191  BOOL   disable_delay_flush             :1; /* Don't flush before "delay" in ACL */
 192  BOOL   disable_logging                 :1; /* Disables log writing when TRUE */
 193 #ifndef DISABLE_DKIM
 194  BOOL   dkim_disable_verify             :1; /* Set via ACL control statement. When set, DKIM verification is disabled for the current message */
 195 #endif
 196 #ifdef EXPERIMENTAL_DMARC
 197  BOOL   dmarc_has_been_checked          :1; /* Global variable to check if test has been called yet */
 198  BOOL   dmarc_disable_verify            :1; /* Set via ACL control statement. When set, DMARC verification is disabled for the current message */
 199  BOOL   dmarc_enable_forensic           :1; /* Set via ACL control statement. When set, DMARC forensic reports are enabled for the current message */
 200 #endif
 201  BOOL   dont_deliver                    :1; /* TRUE for -N option */
 202  BOOL   dot_ends                        :1; /* TRUE if "." ends non-SMTP input */
 203
 204  BOOL   enable_dollar_recipients        :1; /* Make $recipients available */
 205  BOOL   expand_string_forcedfail        :1; /* TRUE if failure was "expected" */
 206
 207  BOOL   filter_running                  :1; /* TRUE while running a filter */
 208
 209  BOOL   header_rewritten                :1; /* TRUE if header changed by router */
 210  BOOL   helo_verified                   :1; /* True if HELO verified */
 211  BOOL   helo_verify_failed              :1; /* True if attempt failed */
 212  BOOL   host_checking_callout           :1; /* TRUE if real callout wanted */
 213  BOOL   host_find_failed_syntax         :1; /* DNS syntax check failure */
 214
 215  BOOL   inetd_wait_mode                 :1; /* Whether running in inetd wait mode */
 216  BOOL   is_inetd                        :1; /* True for inetd calls */
 217
 218  BOOL   local_error_message             :1; /* True if handling one of these */
 219  BOOL   log_testing_mode                :1; /* TRUE in various testing modes */
 220
 221 #ifdef WITH_CONTENT_SCAN
 222  BOOL   no_mbox_unspool                 :1; /* don't unlink files in /scan directory */
 223 #endif
 224  BOOL   no_multiline_responses          :1; /* For broken clients */
 225
 226  BOOL   parse_allow_group               :1; /* Allow group syntax */
 227  BOOL   parse_found_group               :1; /* In the middle of a group */
 228  BOOL   pipelining_enable               :1; /* As it says */
 229 #if defined(SUPPORT_PROXY) || defined(SUPPORT_SOCKS)
 230  BOOL   proxy_session_failed            :1; /* TRUE if required proxy negotiation failed */
 231 #endif
 232
 233  BOOL   queue_2stage                    :1; /* Run queue in 2-stage manner */
 234  BOOL   queue_only_policy               :1; /* ACL or local_scan wants queue_only */
 235  BOOL   queue_run_first_delivery        :1; /* If TRUE, first deliveries only */
 236  BOOL   queue_run_force                 :1; /* TRUE to force during queue run */
 237  BOOL   queue_run_local                 :1; /* Local deliveries only in queue run */
 238  BOOL   queue_running                   :1; /* TRUE for queue running process and */
 239  BOOL   queue_smtp                      :1; /* Disable all immediate SMTP (-odqs)*/
 240
 241  BOOL   really_exim                     :1; /* FALSE in utilities */
 242  BOOL   receive_call_bombout            :1; /* Flag for crashing log */
 243  BOOL   recipients_discarded            :1; /* By an ACL */
 244  BOOL   running_in_test_harness         :1; /*TRUE when running_status is patched */
 245
 246  BOOL   search_find_defer               :1; /* Set TRUE if lookup deferred */
 247  BOOL   sender_address_forced           :1; /* Set by -f */
 248  BOOL   sender_host_notsocket           :1; /* Set for -bs and -bS */
 249  BOOL   sender_host_unknown             :1; /* TRUE for -bs and -bS except inetd */
 250  BOOL   sender_local                    :1; /* TRUE for local senders */
 251  BOOL   sender_name_forced              :1; /* Set by -F */
 252  BOOL   sender_set_untrusted            :1; /* Sender set by untrusted caller */
 253  BOOL   smtp_authenticated              :1; /* Sending client has authenticated */
 254 #ifdef EXPERIMENTAL_PIPE_CONNECT
 255  BOOL   smtp_in_early_pipe_advertised   :1; /* server advertised PIPE_CONNECT */
 256  BOOL   smtp_in_early_pipe_no_auth      :1; /* too many authenticator names */
 257  BOOL   smtp_in_early_pipe_used         :1; /* client did send early data */
 258 #endif
 259  BOOL   smtp_in_pipelining_advertised   :1; /* server advertised PIPELINING */
 260  BOOL   smtp_in_pipelining_used         :1; /* server noted client using PIPELINING */
 261  BOOL   spool_file_wireformat           :1; /* current -D file has CRLF rather than NL */
 262  BOOL   submission_mode                 :1; /* Can be forced from ACL */
 263  BOOL   suppress_local_fixups           :1; /* Can be forced from ACL */
 264  BOOL   suppress_local_fixups_default   :1; /* former is reset to this; override with -G */
 265  BOOL   synchronous_delivery            :1; /* TRUE if -odi is set */
 266  BOOL   system_filtering                :1; /* TRUE when running system filter */
 267
 268  BOOL   tcp_fastopen_ok                 :1; /* appears to be supported by kernel */
 269  BOOL   tcp_in_fastopen                 :1; /* conn usefully used fastopen */
 270  BOOL   tcp_in_fastopen_data            :1; /* fastopen carried data */
 271  BOOL   tcp_in_fastopen_logged          :1; /* one-time logging */
 272  BOOL   tcp_out_fastopen_logged         :1; /* one-time logging */
 273  BOOL   timestamps_utc                  :1; /* Use UTC for all times */
 274  BOOL   transport_filter_timed_out      :1; /* True if it did */
 275  BOOL   trusted_caller                  :1; /* Caller is trusted */
 276  BOOL   trusted_config                  :1; /* Configuration file is trusted */
 277 } f;
 278
 279
 280 /* General global variables */
 281
 282 extern BOOL    accept_8bitmime;        /* Allow *BITMIME incoming */
 283 extern uschar *add_environment;        /* List of environment variables to add */
 284 extern header_line *acl_added_headers; /* Headers added by an ACL */
 285 extern tree_node *acl_anchor;          /* Tree of named ACLs */
 286 extern uschar *acl_arg[9];             /* Argument to ACL call */
 287 extern int     acl_narg;               /* Number of arguments to ACL call */
 288 extern int     acl_level;              /* Nesting depth and debug indent */
 289 extern uschar *acl_not_smtp;           /* ACL run for non-SMTP messages */
 290 #ifdef WITH_CONTENT_SCAN
 291 extern uschar *acl_not_smtp_mime;      /* For MIME parts of ditto */
 292 #endif
 293 extern uschar *acl_not_smtp_start;     /* ACL run at the beginning of a non-SMTP session */
 294 extern uschar *acl_removed_headers;    /* Headers deleted by an ACL */
 295 extern uschar *acl_smtp_auth;          /* ACL run for AUTH */
 296 extern uschar *acl_smtp_connect;       /* ACL run on SMTP connection */
 297 extern uschar *acl_smtp_data;          /* ACL run after DATA received */
 298 #ifndef DISABLE_PRDR
 299 extern uschar *acl_smtp_data_prdr;     /* ACL run after DATA received if in PRDR mode*/
 300 const extern pcre *regex_PRDR;         /* For recognizing PRDR settings */
 301 #endif
 302 #ifndef DISABLE_DKIM
 303 extern uschar *acl_smtp_dkim;          /* ACL run for DKIM signatures / domains */
 304 #endif
 305 extern uschar *acl_smtp_etrn;          /* ACL run for ETRN */
 306 extern uschar *acl_smtp_expn;          /* ACL run for EXPN */
 307 extern uschar *acl_smtp_helo;          /* ACL run for HELO/EHLO */
 308 extern uschar *acl_smtp_mail;          /* ACL run for MAIL */
 309 extern uschar *acl_smtp_mailauth;      /* ACL run for MAIL AUTH */
 310 #ifdef WITH_CONTENT_SCAN
 311 extern uschar *acl_smtp_mime;          /* ACL run after DATA, before acl_smtp_data, for each MIME part */
 312 #endif
 313 extern uschar *acl_smtp_notquit;       /* ACL run for disconnects */
 314 extern uschar *acl_smtp_predata;       /* ACL run for DATA command */
 315 extern uschar *acl_smtp_quit;          /* ACL run for QUIT */
 316 extern uschar *acl_smtp_rcpt;          /* ACL run for RCPT */
 317 extern uschar *acl_smtp_starttls;      /* ACL run for STARTTLS */
 318 extern uschar *acl_smtp_vrfy;          /* ACL run for VRFY */
 319 extern tree_node *acl_var_c;           /* ACL connection variables */
 320 extern tree_node *acl_var_m;           /* ACL message variables */
 321 extern uschar *acl_verify_message;     /* User message for verify failure */
 322 extern string_item *acl_warn_logged;   /* Logged lines */
 323 extern uschar *acl_wherecodes[];       /* Response codes for ACL fails */
 324 extern uschar *acl_wherenames[];       /* Names for messages */
 325 extern address_item *addr_duplicate;   /* Duplicate address list */
 326 extern address_item address_defaults;  /* Default data for address item */
 327 extern uschar *address_file;           /* Name of file when delivering to one */
 328 extern uschar *address_pipe;           /* Pipe command when delivering to one */
 329 extern tree_node *addresslist_anchor;  /* Tree of defined address lists */
 330 extern int     addresslist_count;      /* Number defined */
 331 extern gid_t  *admin_groups;           /* List of admin groups */
 332 extern BOOL    allow_domain_literals;  /* As it says */
 333 extern BOOL    allow_mx_to_ip;         /* Allow MX records to -> ip address */
 334 #ifdef EXPERIMENTAL_ARC
 335 struct arc_set *arc_received;          /* highest ARC instance evaluation struct */
 336 extern int     arc_received_instance;  /* highest ARC instance number in headers */
 337 extern int     arc_oldest_pass;        /* lowest passing instance number in headers */
 338 extern const uschar *arc_state;        /* verification state */
 339 extern const uschar *arc_state_reason;
 340 #endif
 341 extern BOOL    allow_utf8_domains;     /* For experimenting */
 342 extern uschar *authenticated_fail_id;  /* ID that failed authentication */
 343 extern uschar *authenticated_id;       /* ID that was authenticated */
 344 extern uschar *authenticated_sender;   /* From AUTH on MAIL */
 345 extern BOOL    authentication_failed;  /* TRUE if AUTH was tried and failed */
 346 extern uschar *auth_advertise_hosts;   /* Only advertise to these */
 347 extern auth_info auths_available[];    /* Vector of available auth mechanisms */
 348 extern auth_instance *auths;           /* Chain of instantiated auths */
 349 extern auth_instance auth_defaults;    /* Default values */
 350 extern uschar *auth_defer_msg;         /* Error message for log */
 351 extern uschar *auth_defer_user_msg;    /* Error message for user */
 352 extern uschar *auth_vars[];            /* $authn variables */
 353 extern int     auto_thaw;              /* Auto-thaw interval */
 354 #ifdef WITH_CONTENT_SCAN
 355 extern int     av_failed;              /* TRUE if the AV process failed */
 356 extern uschar *av_scanner;             /* AntiVirus scanner to use for the malware condition */
 357 #endif
 358
 359 extern uschar *base62_chars;           /* Table of base-62 characters */
 360 extern uschar *bi_command;             /* Command for -bi option */
 361 extern uschar *big_buffer;             /* Used for various temp things */
 362 extern int     big_buffer_size;        /* Current size (can expand) */
 363 #ifdef EXPERIMENTAL_BRIGHTMAIL
 364 extern uschar *bmi_alt_location;       /* expansion variable that contains the alternate location for the rcpt (available during routing) */
 365 extern uschar *bmi_base64_tracker_verdict; /* expansion variable with base-64 encoded OLD verdict string (available during routing) */
 366 extern uschar *bmi_base64_verdict;     /* expansion variable with base-64 encoded verdict string (available during routing) */
 367 extern uschar *bmi_config_file;        /* Brightmail config file */
 368 extern int     bmi_deliver;            /* Flag that determines if the message should be delivered to the rcpt (available during routing) */
 369 extern int     bmi_run;                /* Flag that determines if message should be run through Brightmail server */
 370 extern uschar *bmi_verdicts;           /* BASE64-encoded verdicts with recipient lists */
 371 #endif
 372 extern int     bsmtp_transaction_linecount; /* Start of last transaction */
 373 extern int     body_8bitmime;          /* sender declared BODY= ; 7=7BIT, 8=8BITMIME */
 374 extern uschar *bounce_message_file;    /* Template file */
 375 extern uschar *bounce_message_text;    /* One-liner */
 376 extern uschar *bounce_recipient;       /* When writing an errmsg */
 377 extern BOOL    bounce_return_body;     /* Include body in returned message */
 378 extern int     bounce_return_linesize_limit; /* Max line length in return */
 379 extern BOOL    bounce_return_message;  /* Include message in bounce */
 380 extern int     bounce_return_size_limit; /* Max amount to return */
 381 extern uschar *bounce_sender_authentication; /* AUTH address for bounces */
 382
 383 extern uschar *callout_address;         /* Address used for a malware/spamd/verify etc. callout */
 384 extern int     callout_cache_domain_positive_expire; /* Time for positive domain callout cache records to expire */
 385 extern int     callout_cache_domain_negative_expire; /* Time for negative domain callout cache records to expire */
 386 extern int     callout_cache_positive_expire; /* Time for positive callout cache records to expire */
 387 extern int     callout_cache_negative_expire; /* Time for negative callout cache records to expire */
 388 extern uschar *callout_random_local_part; /* Local part to be used to check if server called will accept any local part */
 389 extern uschar *check_dns_names_pattern;/* Regex for syntax check */
 390 extern int     check_log_inodes;       /* Minimum for message acceptance */
 391 extern int_eximarith_t check_log_space; /* Minimum for message acceptance */
 392 extern BOOL    check_rfc2047_length;   /* Check RFC 2047 encoded string length */
 393 extern int     check_spool_inodes;     /* Minimum for message acceptance */
 394 extern int_eximarith_t check_spool_space; /* Minimum for message acceptance */
 395 extern uschar *chunking_advertise_hosts;    /* RFC 3030 CHUNKING */
 396 extern unsigned chunking_datasize;
 397 extern unsigned chunking_data_left;
 398 extern chunking_state_t chunking_state;
 399 extern uschar *client_authenticator;        /* Authenticator name used for smtp delivery */
 400 extern uschar *client_authenticated_id;     /* "login" name used for SMTP AUTH */
 401 extern uschar *client_authenticated_sender; /* AUTH option to SMTP MAIL FROM (not yet used) */
 402 extern int     clmacro_count;          /* Number of command line macros */
 403 extern uschar *clmacros[];             /* Copy of them, for re-exec */
 404 extern BOOL    commandline_checks_require_admin; /* belt and braces for insecure setups */
 405 extern int     connection_max_messages;/* Max down one SMTP connection */
 406 extern FILE   *config_file;            /* Configuration file */
 407 extern const uschar *config_filename;  /* Configuration file name */
 408 extern gid_t   config_gid;             /* Additional group owner */
 409 extern int     config_lineno;          /* Line number */
 410 extern uschar *config_main_filelist;   /* List of possible config files */
 411 extern uschar *config_main_filename;   /* File name actually used */
 412 extern uschar *config_main_directory;  /* Directory where the main config file was found */
 413 extern uid_t   config_uid;             /* Additional owner */
 414 extern uschar *continue_proxy_cipher;  /* TLS cipher for proxied continued delivery */
 415 extern uschar *continue_hostname;      /* Host for continued delivery */
 416 extern uschar *continue_host_address;  /* IP address for ditto */
 417 extern int     continue_sequence;      /* Sequence num for continued delivery */
 418 extern uschar *continue_transport;     /* Transport for continued delivery */
 419
 420 extern uschar *csa_status;             /* Client SMTP Authorization result */
 421
 422 typedef struct {
 423   unsigned     callout_hold_only:1;    /* Conn is only for verify callout */
 424   unsigned     delivery:1;             /* When to attempt */
 425   unsigned     defer_pass:1;           /* Pass 4xx to caller rather than spooling */
 426   unsigned     is_tls:1;               /* Conn has TLS active */
 427   client_conn_ctx cctx;                /* Open connection */
 428   int          nrcpt;                  /* Count of addresses */
 429   uschar *     transport;              /* Name of transport */
 430   uschar *     interface;              /* (address of) */
 431   uschar *     snd_ip;                 /* sending_ip_address */
 432   int          snd_port;               /* sending_port */
 433   unsigned     peer_options;           /* smtp_peer_options */
 434   host_item    host;                   /* Host used */
 435   address_item addr;                   /* (Chain of) addresses */
 436 } cut_t;
 437 extern cut_t cutthrough;               /* Deliver-concurrently */
 438
 439 extern uschar *daemon_smtp_port;       /* Can be a list of ports */
 440 extern int     daemon_startup_retries; /* Number of times to retry */
 441 extern int     daemon_startup_sleep;   /* Sleep between retries */
 442
 443 #ifdef EXPERIMENTAL_DCC
 444 extern BOOL    dcc_direct_add_header;  /* directly add header */
 445 extern uschar *dcc_header;             /* dcc header */
 446 extern uschar *dcc_result;             /* dcc result */
 447 extern uschar *dccifd_address;         /* address of the dccifd daemon */
 448 extern uschar *dccifd_options;         /* options for the dccifd daemon */
 449 #endif
 450
 451 extern int     debug_fd;               /* The fd for debug_file */
 452 extern FILE   *debug_file;             /* Where to write debugging info */
 453 extern int     debug_notall[];         /* Debug options excluded from +all */
 454 extern bit_table debug_options[];      /* Table of debug options */
 455 extern int     debug_options_count;    /* Size of table */
 456 extern BOOL    debug_store;            /* Do extra checks on store_reset */
 457 extern int     delay_warning[];        /* Times between warnings */
 458 extern uschar *delay_warning_condition; /* Condition string for warnings */
 459 extern BOOL    delivery_date_remove;   /* Remove delivery-date headers */
 460
 461 extern uschar *deliver_address_data;   /* Arbitrary data for an address */
 462 extern int     deliver_datafile;       /* FD for data part of message */
 463 extern const uschar *deliver_domain;   /* The local domain for delivery */
 464 extern uschar *deliver_domain_data;    /* From domain lookup */
 465 extern const uschar *deliver_domain_orig; /* The original local domain for delivery */
 466 extern const uschar *deliver_domain_parent; /* The parent domain for delivery */
 467 extern BOOL    deliver_drop_privilege; /* TRUE for unprivileged delivery */
 468 extern time_t  deliver_frozen_at;      /* Time of freezing */
 469 extern uschar *deliver_home;           /* Home directory for pipes */
 470 extern const uschar *deliver_host;     /* (First) host for routed local deliveries */
 471                                        /* Remote host for filter */
 472 extern const uschar *deliver_host_address; /* Address for remote delivery filter */
 473 extern int     deliver_host_port;      /* Address for remote delivery filter */
 474 extern uschar *deliver_in_buffer;      /* Buffer for copying file */
 475 extern ino_t   deliver_inode;          /* Inode for appendfile */
 476 extern uschar *deliver_localpart;      /* The local part for delivery */
 477 extern uschar *deliver_localpart_data; /* From local part lookup */
 478 extern uschar *deliver_localpart_orig; /* The original local part for delivery */
 479 extern uschar *deliver_localpart_parent; /* The parent local part for delivery */
 480 extern uschar *deliver_localpart_prefix; /* The stripped prefix, if any */
 481 extern uschar *deliver_localpart_suffix; /* The stripped suffix, if any */
 482 extern uschar *deliver_out_buffer;     /* Buffer for copying file */
 483 extern int     deliver_queue_load_max; /* Different value for queue running */
 484 extern address_item *deliver_recipients; /* Current set of addresses */
 485 extern uschar *deliver_selectstring;   /* For selecting by recipient */
 486 extern uschar *deliver_selectstring_sender; /* For selecting by sender */
 487 #ifdef ENABLE_DISABLE_FSYNC
 488 extern BOOL    disable_fsync;          /* Not for normal use */
 489 #endif
 490 extern BOOL    disable_ipv6;           /* Don't do any IPv6 things */
 491
 492 #ifndef DISABLE_DKIM
 493 extern unsigned dkim_collect_input;    /* Runtime count of dkim signtures; tracks whether SMTP input is fed to DKIM validation */
 494 extern uschar *dkim_cur_signer;        /* Expansion variable, holds the current "signer" domain or identity during a acl_smtp_dkim run */
 495 extern int     dkim_key_length;        /* Expansion variable, length of signing key in bits */
 496 extern void   *dkim_signatures;        /* Actually a (pdkim_signature *) but most files do not need to know */
 497 extern uschar *dkim_signers;           /* Expansion variable, holds colon-separated list of domains and identities that have signed a message */
 498 extern uschar *dkim_signing_domain;    /* Expansion variable, domain used for signing a message. */
 499 extern uschar *dkim_signing_selector;  /* Expansion variable, selector used for signing a message. */
 500 extern uschar *dkim_verify_overall;    /* First successful domain verified, or null */
 501 extern uschar *dkim_verify_signers;    /* Colon-separated list of domains for each of which we call the DKIM ACL */
 502 extern uschar *dkim_verify_status;     /* result for this signature */
 503 extern uschar *dkim_verify_reason;     /* result for this signature */
 504 #endif
 505 #ifdef EXPERIMENTAL_DMARC
 506 extern uschar *dmarc_domain_policy;    /* Expansion for declared policy of used domain */
 507 extern uschar *dmarc_forensic_sender;  /* Set sender address for forensic reports */
 508 extern uschar *dmarc_history_file;     /* Expansion variable, file to store dmarc results */
 509 extern uschar *dmarc_status;           /* Expansion variable, one word value */
 510 extern uschar *dmarc_status_text;      /* Expansion variable, human readable value */
 511 extern uschar *dmarc_tld_file;         /* Mozilla TLDs text file */
 512 extern uschar *dmarc_used_domain;      /* Expansion variable, domain libopendmarc chose for DMARC policy lookup */
 513 #endif
 514
 515 extern uschar *dns_again_means_nonexist; /* Domains that are badly set up */
 516 extern int     dns_csa_search_limit;   /* How deep to search for CSA SRV records */
 517 extern BOOL    dns_csa_use_reverse;    /* Check CSA in reverse DNS? (non-standard) */
 518 extern int     dns_cname_loops;        /* Follow CNAMEs returned by resolver to this depth */
 519 extern uschar *dns_ipv4_lookup;        /* For these domains, don't look for AAAA (or A6) */
 520 #ifdef SUPPORT_DANE
 521 extern int     dns_dane_ok;            /* Ok to use DANE when checking TLS authenticity */
 522 #endif
 523 extern int     dns_retrans;            /* Retransmission time setting */
 524 extern int     dns_retry;              /* Number of retries */
 525 extern int     dns_dnssec_ok;          /* When constructing DNS query, set DO flag */
 526 extern uschar *dns_trust_aa;           /* DNSSEC trust AA as AD */
 527 extern int     dns_use_edns0;          /* Coerce EDNS0 support on/off in resolver. */
 528 extern uschar *dnslist_domain;         /* DNS (black) list domain */
 529 extern uschar *dnslist_matched;        /* DNS (black) list matched key */
 530 extern uschar *dnslist_text;           /* DNS (black) list text message */
 531 extern uschar *dnslist_value;          /* DNS (black) list IP address */
 532 extern tree_node *domainlist_anchor;   /* Tree of defined domain lists */
 533 extern int     domainlist_count;       /* Number defined */
 534
 535 /* This option is now a no-opt, retained for compatibility */
 536 extern BOOL    drop_cr;                /* For broken local MUAs */
 537
 538 extern uschar *dsn_from;               /* From: string for DSNs */
 539
 540 extern BOOL    envelope_to_remove;     /* Remove envelope_to_headers */
 541 extern int     errno_quota;            /* Quota errno in this OS */
 542 extern int     error_handling;         /* Error handling style */
 543 extern uschar *errors_copy;            /* For taking copies of errors */
 544 extern uschar *errors_reply_to;        /* Reply-to for error messages */
 545 extern int     errors_sender_rc;       /* Return after message to sender*/
 546
 547 #ifndef DISABLE_EVENT
 548 extern uschar *event_action;           /* expansion for delivery events */
 549 extern uschar *event_data;             /* event data */
 550 extern int     event_defer_errno;      /* error number set when a remote delivery is deferred with a host error */
 551 extern const uschar *event_name;       /* event classification */
 552 #endif
 553
 554 extern gid_t   exim_gid;               /* To be used with exim_uid */
 555 extern BOOL    exim_gid_set;           /* TRUE if exim_gid set */
 556 extern uschar *exim_path;              /* Path to exec exim */
 557 extern const uschar *exim_sieve_extension_list[]; /* list of sieve extensions */
 558 extern uid_t   exim_uid;               /* Non-root uid for exim */
 559 extern BOOL    exim_uid_set;           /* TRUE if exim_uid set */
 560 extern int     expand_level;           /* Nesting depth; indent for debug */
 561 extern int     expand_forbid;          /* RDO flags for forbidding things */
 562 extern int     expand_nlength[];       /* Lengths of numbered strings */
 563 extern int     expand_nmax;            /* Max numerical value */
 564 extern uschar *expand_nstring[];       /* Numbered strings */
 565 extern BOOL    extract_addresses_remove_arguments; /* Controls -t behaviour */
 566 extern uschar *extra_local_interfaces; /* Local, non-listen interfaces */
 567
 568 extern int     fake_response;          /* Fake FAIL or DEFER response to data */
 569 extern uschar *fake_response_text;     /* User defined message for the above. Default is in globals.c. */
 570 extern int     filter_n[FILTER_VARIABLE_COUNT]; /* filter variables */
 571 extern int     filter_sn[FILTER_VARIABLE_COUNT]; /* variables set by system filter */
 572 extern int     filter_test;            /* Filter test type */
 573 extern uschar *filter_test_sfile;      /* System filter test file */
 574 extern uschar *filter_test_ufile;      /* User filter test file */
 575 extern uschar *filter_thisaddress;     /* For address looping */
 576 extern int     finduser_retries;       /* Retry count for getpwnam() */
 577 extern uid_t   fixed_never_users[];    /* Can't be overridden */
 578 extern uschar *freeze_tell;            /* Message on (some) freezings */
 579 extern uschar *freeze_tell_config;     /* The configured setting */
 580 extern uschar *fudged_queue_times;     /* For use in test harness */
 581
 582 extern uschar *gecos_name;             /* To be expanded when pattern matches */
 583 extern uschar *gecos_pattern;          /* Pattern to match */
 584 extern rewrite_rule *global_rewrite_rules;  /* Chain of rewriting rules */
 585
 586 extern volatile sig_atomic_t had_command_timeout;   /* Alarm sighandler called */
 587 extern volatile sig_atomic_t had_command_sigterm;   /* TERM  sighandler called */
 588 extern volatile sig_atomic_t had_data_timeout;      /* Alarm sighandler called */
 589 extern volatile sig_atomic_t had_data_sigint;       /* TERM/INT  sighandler called */
 590 extern int     header_insert_maxlen;   /* Max for inserting headers */
 591 extern int     header_maxsize;         /* Max total length for header */
 592 extern int     header_line_maxsize;    /* Max for an individual line */
 593 extern header_name header_names[];     /* Table of header names */
 594 extern int     header_names_size;      /* Number of entries */
 595 extern uschar *helo_accept_junk_hosts; /* Allowed to use junk arg */
 596 extern uschar *helo_allow_chars;       /* Rogue chars to allow in HELO/EHLO */
 597 extern uschar *helo_lookup_domains;    /* If these given, lookup host name */
 598 extern uschar *helo_try_verify_hosts;  /* Soft check HELO argument for these */
 599 extern uschar *helo_verify_hosts;      /* Hard check HELO argument for these */
 600 extern const uschar *hex_digits;             /* Used in several places */
 601 extern uschar *hold_domains;           /* Hold up deliveries to these */
 602 extern uschar *host_data;              /* Obtained from lookup in ACL */
 603 extern uschar *host_lookup;            /* For which IP addresses are always looked up */
 604 extern BOOL    host_lookup_deferred;   /* TRUE if lookup deferred */
 605 extern BOOL    host_lookup_failed;     /* TRUE if lookup failed */
 606 extern uschar *host_lookup_order;      /* Order of host lookup types */
 607 extern uschar *host_lookup_msg;        /* Text for why it failed */
 608 extern int     host_number;            /* For sharing spools */
 609 extern uschar *host_number_string;     /* For expanding */
 610 extern uschar *host_reject_connection; /* Reject these hosts */
 611 extern tree_node *hostlist_anchor;     /* Tree of defined host lists */
 612 extern int     hostlist_count;         /* Number defined */
 613 extern uschar *hosts_connection_nolog; /* Limits the logging option */
 614 extern uschar *hosts_treat_as_local;   /* For routing */
 615
 616 extern int     ignore_bounce_errors_after; /* Keep them for this time. */
 617 extern BOOL    ignore_fromline_local;  /* Local SMTP ignore fromline */
 618 extern uschar *ignore_fromline_hosts;  /* Hosts permitted to send "From " */
 619 extern int     inetd_wait_timeout;     /* Timeout for inetd wait mode */
 620 extern uschar *initial_cwd;            /* The directory we where in at startup */
 621 extern uschar *iterate_item;           /* Item from iterate list */
 622
 623 extern int     journal_fd;             /* Fd for journal file */
 624
 625 extern uschar *keep_environment;       /* Whitelist for environment variables */
 626 extern int     keep_malformed;         /* Time to keep malformed messages */
 627
 628 extern uschar *eldap_dn;               /* Where LDAP DNs are left */
 629 extern int     load_average;           /* Most recently read load average */
 630 extern BOOL    local_from_check;       /* For adding Sender: (global value) */
 631 extern uschar *local_from_prefix;      /* Permitted prefixes */
 632 extern uschar *local_from_suffix;      /* Permitted suffixes */
 633 extern uschar *local_interfaces;       /* For forcing specific interfaces */
 634 #ifdef HAVE_LOCAL_SCAN
 635 extern uschar *local_scan_data;        /* Text returned by local_scan() */
 636 extern optionlist local_scan_options[];/* Option list for local_scan() */
 637 extern int     local_scan_options_count; /* Size of the list */
 638 extern int     local_scan_timeout;     /* Timeout for local_scan() */
 639 #endif
 640 extern BOOL    local_sender_retain;    /* Retain Sender: (with no From: check) */
 641 extern gid_t   local_user_gid;         /* As it says; may be set in routers */
 642 extern uid_t   local_user_uid;         /* As it says; may be set in routers */
 643 extern tree_node *localpartlist_anchor;/* Tree of defined localpart lists */
 644 extern int     localpartlist_count;    /* Number defined */
 645 extern uschar *log_buffer;             /* For constructing log entries */
 646 extern int     log_default[];          /* Initialization list for log_selector */
 647 extern uschar *log_file_path;          /* If unset, use default */
 648 extern int     log_notall[];           /* Log options excluded from +all */
 649 extern bit_table log_options[];        /* Table of options */
 650 extern int     log_options_count;      /* Size of table */
 651 extern int     log_reject_target;      /* Target log for ACL rejections */
 652 extern unsigned int log_selector[];    /* Bit map of logging options */
 653 extern uschar *log_selector_string;    /* As supplied in the config */
 654 extern FILE   *log_stderr;             /* Copy of stderr for log use, or NULL */
 655 extern BOOL    log_timezone;           /* TRUE to include the timezone in log lines */
 656 extern uschar *login_sender_address;   /* The actual sender address */
 657 extern lookup_info **lookup_list;      /* Array of pointers to available lookups */
 658 extern int     lookup_list_count;      /* Number of entries in the list */
 659 extern uschar *lookup_dnssec_authenticated; /* AD status of dns lookup */
 660 extern int     lookup_open_max;        /* Max lookup files to cache */
 661 extern uschar *lookup_value;           /* Value looked up from file */
 662
 663 extern macro_item *macros;             /* Configuration macros */
 664 extern macro_item *macros_user;        /* Non-builtin configuration macros */
 665 extern macro_item *mlast;              /* Last item in macro list */
 666 extern uschar *mailstore_basename;     /* For mailstore deliveries */
 667 #ifdef WITH_CONTENT_SCAN
 668 extern uschar *malware_name;           /* Name of virus or malware ("W32/Klez-H") */
 669 #endif
 670 extern int     max_received_linelength;/* What it says */
 671 extern int     max_username_length;    /* For systems with broken getpwnam() */
 672 extern int     message_age;            /* In seconds */
 673 extern uschar *message_body;           /* Start of message body for filter */
 674 extern uschar *message_body_end;       /* End of message body for filter */
 675 extern BOOL    message_body_newlines;  /* FALSE => remove newlines */
 676 extern int     message_body_size;      /* Sic */
 677 extern int     message_body_visible;   /* Amount visible in message_body */
 678 extern int     message_ended;          /* State of message reading and how ended */
 679 extern uschar *message_headers;        /* When built */
 680 extern uschar  message_id_option[];    /* -E<message-id> for use as option */
 681 extern uschar *message_id_external;    /* External form of following */
 682 extern uschar *message_id_domain;      /* Expanded to form domain-part of message_id */
 683 extern uschar *message_id_text;        /* Expanded to form message_id */
 684 extern struct timeval message_id_tv;   /* Time used to create last message_id */
 685 extern int     message_linecount;      /* As it says */
 686 extern BOOL    message_logs;           /* TRUE to write message logs */
 687 extern int     message_size;           /* Size of message */
 688 extern uschar *message_size_limit;     /* As it says */
 689 #ifdef SUPPORT_I18N
 690 extern BOOL    message_smtputf8;       /* Internationalized mail handling */
 691 extern int     message_utf8_downconvert; /* convert from utf8 */
 692 const extern pcre *regex_UTF8;         /* For recognizing SMTPUTF8 settings */
 693 #endif
 694 extern uschar  message_subdir[];       /* Subdirectory for messages */
 695 extern uschar *message_reference;      /* Reference for error messages */
 696
 697 /* MIME ACL expandables */
 698 #ifdef WITH_CONTENT_SCAN
 699 extern int     mime_anomaly_level;
 700 extern const uschar *mime_anomaly_text;
 701 extern uschar *mime_boundary;
 702 extern uschar *mime_charset;
 703 extern uschar *mime_content_description;
 704 extern uschar *mime_content_disposition;
 705 extern uschar *mime_content_id;
 706 extern unsigned int mime_content_size;
 707 extern uschar *mime_content_transfer_encoding;
 708 extern uschar *mime_content_type;
 709 extern uschar *mime_decoded_filename;
 710 extern uschar *mime_filename;
 711 extern int     mime_is_multipart;
 712 extern int     mime_is_coverletter;
 713 extern int     mime_is_rfc822;
 714 extern int     mime_part_count;
 715 #endif
 716
 717 extern BOOL    mua_wrapper;            /* TRUE when Exim is wrapping an MUA */
 718
 719 extern uid_t  *never_users;            /* List of uids never to be used */
 720 #ifdef WITH_CONTENT_SCAN
 721 #endif
 722
 723 extern const int on;                   /* For setsockopt */
 724 extern const int off;
 725
 726 extern optionlist optionlist_auths[];      /* These option lists are made */
 727 extern int     optionlist_auths_size;      /* global so that readconf can */
 728 extern optionlist optionlist_routers[];    /* see them for printing out   */
 729 extern int     optionlist_routers_size;    /* the options.                */
 730 extern optionlist optionlist_transports[];
 731 extern int     optionlist_transports_size;
 732
 733 extern uid_t   original_euid;          /* Original effective uid */
 734 extern gid_t   originator_gid;         /* Gid of whoever wrote spool file */
 735 extern uschar *originator_login;       /* Login of same */
 736 extern uschar *originator_name;        /* Full name of same */
 737 extern uid_t   originator_uid;         /* Uid of ditto */
 738 extern uschar *override_local_interfaces; /* Value of -oX argument */
 739 extern uschar *override_pid_file_path; /* Value of -oP argument */
 740
 741 extern uschar *percent_hack_domains;   /* Local domains for which '% operates */
 742 extern uschar *pid_file_path;          /* For writing daemon pids */
 743 #ifdef EXPERIMENTAL_PIPE_CONNECT
 744 extern uschar *pipe_connect_advertise_hosts; /* for banner/EHLO pipelining */
 745 #endif
 746 extern uschar *pipelining_advertise_hosts; /* As it says */
 747 #ifndef DISABLE_PRDR
 748 extern BOOL    prdr_enable;            /* As it says */
 749 extern BOOL    prdr_requested;         /* Connecting mail server wants PRDR */
 750 #endif
 751 extern BOOL    preserve_message_logs;  /* Save msglog files */
 752 extern uschar *primary_hostname;       /* Primary name of this computer */
 753 extern BOOL    print_topbitchars;      /* Topbit chars are printing chars */
 754 extern uschar  process_info[];         /* For SIGUSR1 output */
 755 extern int     process_info_len;
 756 extern uschar *process_log_path;       /* Alternate path */
 757 extern BOOL    prod_requires_admin;    /* TRUE if prodding requires admin */
 758
 759 #if defined(SUPPORT_PROXY) || defined(SUPPORT_SOCKS)
 760 extern uschar *hosts_proxy;            /* Hostlist which (require) use proxy protocol */
 761 extern uschar *proxy_external_address; /* IP of remote interface of proxy */
 762 extern int     proxy_external_port;    /* Port on remote interface of proxy */
 763 extern uschar *proxy_local_address;    /* IP of local interface of proxy */
 764 extern int     proxy_local_port;       /* Port on local interface of proxy */
 765 extern BOOL    proxy_session;          /* TRUE if receiving mail from valid proxy  */
 766 #endif
 767
 768 extern uschar *prvscheck_address;      /* Set during prvscheck expansion item */
 769 extern uschar *prvscheck_keynum;       /* Set during prvscheck expansion item */
 770 extern uschar *prvscheck_result;       /* Set during prvscheck expansion item */
 771
 772 extern const uschar *qualify_domain_recipient; /* Domain to qualify recipients with */
 773 extern uschar *qualify_domain_sender;  /* Domain to qualify senders with */
 774 extern uschar *queue_domains;          /* Queue these domains */
 775 extern BOOL    queue_list_requires_admin; /* TRUE if -bp requires admin */
 776                                        /*   immediate children */
 777 extern pid_t   queue_run_pid;          /* PID of the queue running process or 0 */
 778 extern int     queue_run_pipe;         /* Pipe for synchronizing */
 779 extern int     queue_interval;         /* Queue running interval */
 780 extern uschar *queue_name;             /* Name of queue, if nondefault spooling */
 781 extern BOOL    queue_only;             /* TRUE to disable immediate delivery */
 782 extern int     queue_only_load;        /* Max load before auto-queue */
 783 extern BOOL    queue_only_load_latch;  /* Latch queue_only_load TRUE */
 784 extern uschar *queue_only_file;        /* Queue if file exists/not-exists */
 785 extern BOOL    queue_only_override;    /* Allow override from command line */
 786 extern BOOL    queue_run_in_order;     /* As opposed to random */
 787 extern uschar *queue_run_max;          /* Max queue runners */
 788 extern uschar *queue_smtp_domains;     /* Ditto, for these domains */
 789
 790 extern unsigned int random_seed;       /* Seed for random numbers */
 791 extern tree_node *ratelimiters_cmd;    /* Results of command ratelimit checks */
 792 extern tree_node *ratelimiters_conn;   /* Results of connection ratelimit checks */
 793 extern tree_node *ratelimiters_mail;   /* Results of per-mail ratelimit checks */
 794 extern uschar *raw_active_hostname;    /* Pre-expansion */
 795 extern uschar *raw_sender;             /* Before rewriting */
 796 extern uschar **raw_recipients;        /* Before rewriting */
 797 extern int     raw_recipients_count;
 798 extern int     rcpt_count;             /* Count of RCPT commands in a message */
 799 extern int     rcpt_fail_count;        /* Those that got 5xx */
 800 extern int     rcpt_defer_count;       /* Those that got 4xx */
 801 extern gid_t   real_gid;               /* Real gid */
 802 extern uid_t   real_uid;               /* Real user running program */
 803 extern int     receive_linecount;      /* Mainly for BSMTP errors */
 804 extern int     receive_messagecount;   /* Mainly for BSMTP errors */
 805 extern int     receive_timeout;        /* For non-SMTP acceptance */
 806 extern int     received_count;         /* Count of Received: headers */
 807 extern uschar *received_for;           /* For "for" field */
 808 extern uschar *received_header_text;   /* Definition of Received: header */
 809 extern int     received_headers_max;   /* Max count of Received: headers */
 810 extern struct timeval received_time;   /* Time the message was received */
 811 extern struct timeval received_time_taken; /* Interval the message took to be received */
 812 extern uschar *recipient_data;         /* lookup data for recipients */
 813 extern uschar *recipient_unqualified_hosts; /* Permitted unqualified recipients */
 814 extern uschar *recipient_verify_failure; /* What went wrong */
 815 extern int     recipients_list_max;    /* Maximum number fitting in list */
 816 extern int     recipients_max;         /* Max permitted */
 817 extern BOOL    recipients_max_reject;  /* If TRUE, reject whole message */
 818 extern const pcre *regex_AUTH;         /* For recognizing AUTH settings */
 819 extern const pcre  *regex_check_dns_names; /* For DNS name checking */
 820 extern const pcre  *regex_From;        /* For recognizing "From_" lines */
 821 extern const pcre  *regex_CHUNKING;    /* For recognizing CHUNKING (RFC 3030) */
 822 extern const pcre  *regex_IGNOREQUOTA; /* For recognizing IGNOREQUOTA (LMTP) */
 823 extern const pcre  *regex_PIPELINING;  /* For recognizing PIPELINING */
 824 extern const pcre  *regex_SIZE;        /* For recognizing SIZE settings */
 825 #ifdef EXPERIMENTAL_PIPE_CONNECT
 826 extern const pcre  *regex_EARLY_PIPE;  /* For recognizing PIPE_CONNCT */
 827 #endif
 828 extern const pcre  *regex_ismsgid;     /* Compiled r.e. for message it */
 829 extern const pcre  *regex_smtp_code;   /* For recognizing SMTP codes */
 830 extern uschar *regex_vars[];           /* $regexN variables */
 831 #ifdef WHITELIST_D_MACROS
 832 extern const pcre  *regex_whitelisted_macro; /* For -D macro values */
 833 #endif
 834 #ifdef WITH_CONTENT_SCAN
 835 extern uschar *regex_match_string;     /* regex that matched a line (regex ACL condition) */
 836 #endif
 837 extern int     remote_delivery_count;  /* Number of remote addresses */
 838 extern int     remote_max_parallel;    /* Maximum parallel delivery */
 839 extern uschar *remote_sort_domains;    /* Remote domain sorting order */
 840 extern retry_config *retries;          /* Chain of retry config information */
 841 extern int     retry_data_expire;      /* When to expire retry data */
 842 extern int     retry_interval_max;     /* Absolute maximum */
 843 extern int     retry_maximum_timeout;  /* The maximum timeout */
 844 extern uschar *return_path;            /* Return path for a message */
 845 extern BOOL    return_path_remove;     /* Remove return-path headers */
 846 extern int     rewrite_existflags;     /* Indicate which headers have rewrites */
 847 extern uschar *rfc1413_hosts;          /* RFC hosts */
 848 extern int     rfc1413_query_timeout;  /* Timeout on RFC 1413 calls */
 849 /* extern BOOL    rfc821_domains;  */       /* If set, syntax is 821, not 822 => being abolished */
 850 extern uid_t   root_gid;               /* The gid for root */
 851 extern uid_t   root_uid;               /* The uid for root */
 852 extern router_info routers_available[];/* Vector of available routers */
 853 extern router_instance *routers;       /* Chain of instantiated routers */
 854 extern router_instance router_defaults;/* Default values */
 855 extern uschar *router_name;            /* Name of router last started */
 856 extern ip_address_item *running_interfaces; /* Host's running interfaces */
 857 extern uschar *running_status;         /* Flag string for testing */
 858 extern int     runrc;                  /* rc from ${run} */
 859
 860 extern uschar *search_error_message;   /* Details of lookup problem */
 861 extern uschar *self_hostname;          /* Self host after routing->directors */
 862 extern unsigned int sender_address_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for sender */
 863 extern uschar *sender_address_data;    /* address_data from sender verify */
 864 extern uschar *sender_address_unrewritten; /* Set if rewritten by verify */
 865 extern uschar *sender_data;            /* lookup result for senders */
 866 extern unsigned int sender_domain_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for sender domain */
 867 extern uschar *sender_fullhost;        /* Sender host name + address */
 868 extern BOOL    sender_helo_dnssec;     /* True if HELO verify used DNS and was DNSSEC */
 869 extern uschar *sender_helo_name;       /* Host name from HELO/EHLO */
 870 extern uschar **sender_host_aliases;   /* Points to list of alias names */
 871 extern uschar *sender_host_auth_pubname; /* Public-name of authentication method */
 872 extern unsigned int sender_host_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for incoming host */
 873 extern BOOL    sender_host_dnssec;     /* true if sender_host_name verified in DNSSEC */
 874 extern uschar *sender_ident;           /* Sender identity via RFC 1413 */
 875 extern uschar *sender_rate;            /* Sender rate computed by ACL */
 876 extern uschar *sender_rate_limit;      /* Configured rate limit */
 877 extern uschar *sender_rate_period;     /* Configured smoothing period */
 878 extern uschar *sender_rcvhost;         /* Host data for Received: */
 879 extern uschar *sender_unqualified_hosts; /* Permitted unqualified senders */
 880 extern uschar *sender_verify_failure;  /* What went wrong */
 881 extern address_item *sender_verified_list; /* Saved chain of sender verifies */
 882 extern address_item *sender_verified_failed; /* The one that caused denial */
 883 extern uschar *sending_ip_address;     /* Address of outgoing (SMTP) interface */
 884 extern int     sending_port;           /* Port of outgoing interface */
 885 extern SIGNAL_BOOL sigalrm_seen;       /* Flag for sigalrm_handler */
 886 extern const uschar *sigalarm_setter;  /* For debug, set to callpoint of alarm() */
 887 extern uschar **sighup_argv;           /* Args for re-execing after SIGHUP */
 888 extern int     slow_lookup_log;        /* Log DNS lookups taking longer than N millisecs */
 889 extern int     smtp_accept_count;      /* Count of connections */
 890 extern BOOL    smtp_accept_keepalive;  /* Set keepalive on incoming */
 891 extern int     smtp_accept_max;        /* Max SMTP connections */
 892 extern int     smtp_accept_max_nonmail;/* Max non-mail commands in one con */
 893 extern uschar *smtp_accept_max_nonmail_hosts; /* Limit non-mail cmds from these hosts */
 894 extern int     smtp_accept_max_per_connection; /* Max msgs per connection */
 895 extern uschar *smtp_accept_max_per_host; /* Max SMTP cons from one IP addr */
 896 extern int     smtp_accept_queue;      /* Queue after so many connections */
 897 extern int     smtp_accept_queue_per_connection; /* Queue after so many msgs */
 898 extern int     smtp_accept_reserve;    /* Reserve these SMTP connections */
 899 extern uschar *smtp_active_hostname;   /* Hostname for this message */
 900 extern uschar *smtp_banner;            /* Banner string (to be expanded) */
 901 extern BOOL    smtp_check_spool_space; /* TRUE to check SMTP SIZE value */
 902 extern int     smtp_ch_index;          /* Index in smtp_connection_had */
 903 extern uschar *smtp_cmd_argument;      /* For all SMTP commands */
 904 extern uschar *smtp_cmd_buffer;        /* SMTP command buffer */
 905 extern struct timeval smtp_connection_start; /* Start time of SMTP connection */
 906 extern uschar  smtp_connection_had[];  /* Recent SMTP commands */
 907 extern int     smtp_connect_backlog;   /* Max backlog permitted */
 908 extern double  smtp_delay_mail;        /* Current MAIL delay */
 909 extern double  smtp_delay_rcpt;        /* Current RCPT delay */
 910 extern BOOL    smtp_enforce_sync;      /* Enforce sync rules */
 911 extern uschar *smtp_etrn_command;      /* Command to run */
 912 extern BOOL    smtp_etrn_serialize;    /* Only one at once */
 913 extern FILE   *smtp_in;                /* Incoming SMTP input file */
 914 extern int     smtp_load_reserve;      /* Only from reserved if load > this */
 915 extern int     smtp_mailcmd_count;     /* Count of MAIL commands */
 916 extern int     smtp_max_synprot_errors;/* Max syntax/protocol errors */
 917 extern int     smtp_max_unknown_commands; /* As it says */
 918 extern uschar *smtp_notquit_reason;    /* Global for disconnect reason */
 919 extern FILE   *smtp_out;               /* Incoming SMTP output file */
 920 extern uschar *smtp_ratelimit_hosts;   /* Rate limit these hosts */
 921 extern uschar *smtp_ratelimit_mail;    /* Parameters for MAIL limiting */
 922 extern uschar *smtp_ratelimit_rcpt;    /* Parameters for RCPT limiting */
 923 extern uschar *smtp_read_error;        /* Message for SMTP input error */
 924 extern int     smtp_receive_timeout;   /* Applies to each received line */
 925 extern uschar *smtp_receive_timeout_s; /* ... expandable version */
 926 extern uschar *smtp_reserve_hosts;     /* Hosts for reserved slots */
 927 extern BOOL    smtp_return_error_details; /* TRUE to return full info */
 928 extern int     smtp_rlm_base;          /* Base interval for MAIL rate limit */
 929 extern double  smtp_rlm_factor;        /* Factor for MAIL rate limit */
 930 extern int     smtp_rlm_limit;         /* Max delay */
 931 extern int     smtp_rlm_threshold;     /* Threshold for RCPT rate limit */
 932 extern int     smtp_rlr_base;          /* Base interval for RCPT rate limit */
 933 extern double  smtp_rlr_factor;        /* Factor for RCPT rate limit */
 934 extern int     smtp_rlr_limit;         /* Max delay */
 935 extern int     smtp_rlr_threshold;     /* Threshold for RCPT rate limit */
 936 extern unsigned smtp_peer_options;     /* Global flags for passed connections */
 937 extern unsigned smtp_peer_options_wrap; /* stacked version hidden by TLS */
 938 #ifdef SUPPORT_I18N
 939 extern uschar *smtputf8_advertise_hosts; /* ingress control */
 940 #endif
 941
 942 #ifdef WITH_CONTENT_SCAN
 943 extern uschar *spamd_address;          /* address for the spamassassin daemon */
 944 extern uschar *spam_bar;               /* the spam "bar" (textual representation of spam_score) */
 945 extern uschar *spam_report;            /* the spamd report (multiline) */
 946 extern uschar *spam_action;            /* the spamd recommended-action */
 947 extern uschar *spam_score;             /* the spam score (float) */
 948 extern uschar *spam_score_int;         /* spam_score * 10 (int) */
 949 #endif
 950 #ifdef SUPPORT_SPF
 951 extern uschar *spf_guess;              /* spf best-guess record */
 952 extern uschar *spf_header_comment;     /* spf header comment */
 953 extern uschar *spf_received;           /* Received-SPF: header */
 954 extern uschar *spf_result;             /* spf result in string form */
 955 extern BOOL    spf_result_guessed;     /* spf result is of best-guess operation */
 956 extern uschar *spf_smtp_comment;       /* spf comment to include in SMTP reply */
 957 #endif
 958 extern BOOL    split_spool_directory;  /* TRUE to use multiple subdirs */
 959 extern FILE   *spool_data_file;        /* handle for -D file */
 960 extern uschar *spool_directory;        /* Name of spool directory */
 961 extern BOOL    spool_wireformat;       /* can write wireformat -D files */
 962 #ifdef EXPERIMENTAL_SRS
 963 extern uschar *srs_config;             /* SRS config secret:max age:hash length:use timestamp:use hash */
 964 extern uschar *srs_db_address;         /* SRS db address */
 965 extern uschar *srs_db_key;             /* SRS db key */
 966 extern int     srs_hashlength;         /* SRS hash length */
 967 extern int     srs_hashmin;            /* SRS minimum hash length */
 968 extern int     srs_maxage;             /* SRS max age */
 969 extern uschar *srs_orig_sender;        /* SRS original sender */
 970 extern uschar *srs_orig_recipient;     /* SRS original recipient */
 971 extern uschar *srs_recipient;          /* SRS recipient */
 972 extern uschar *srs_secrets;            /* SRS secrets list */
 973 extern uschar *srs_status;             /* SRS staus */
 974 extern BOOL    srs_usehash;            /* SRS use hash flag */
 975 extern BOOL    srs_usetimestamp;       /* SRS use timestamp flag */
 976 #endif
 977 extern BOOL    strict_acl_vars;        /* ACL variables have to be set before being used */
 978 extern int     string_datestamp_offset;/* After insertion by string_format */
 979 extern int     string_datestamp_length;/* After insertion by string_format */
 980 extern int     string_datestamp_type;  /* After insertion by string_format */
 981 extern BOOL    strip_excess_angle_brackets; /* Surrounding route-addrs */
 982 extern BOOL    strip_trailing_dot;     /* Remove dots at ends of domains */
 983 extern uschar *submission_domain;      /* Domain for submission mode */
 984 extern uschar *submission_name;        /* User name set from ACL */
 985 extern BOOL    syslog_duplication;     /* FALSE => no duplicate logging */
 986 extern int     syslog_facility;        /* As defined by Syslog.h */
 987 extern BOOL    syslog_pid;             /* TRUE if PID on syslogs */
 988 extern uschar *syslog_processname;     /* 'ident' param to openlog() */
 989 extern BOOL    syslog_timestamp;       /* TRUE if time on syslogs */
 990 extern uschar *system_filter;          /* Name of system filter file */
 991
 992 extern uschar *system_filter_directory_transport;  /* Transports for the */
 993 extern uschar *system_filter_file_transport;       /* system filter */
 994 extern uschar *system_filter_pipe_transport;
 995 extern uschar *system_filter_reply_transport;
 996
 997 extern gid_t   system_filter_gid;      /* Gid for running system filter */
 998 extern BOOL    system_filter_gid_set;  /* TRUE if gid set */
 999 extern uid_t   system_filter_uid;      /* Uid for running system filter */
1000 extern BOOL    system_filter_uid_set;  /* TRUE if uid set */
1001
1002 extern blob    tcp_fastopen_nodata;    /* for zero-data TFO connect requests */
1003 extern BOOL    tcp_nodelay;            /* Controls TCP_NODELAY on daemon */
1004 extern tfo_state_t tcp_out_fastopen;   /* TCP fast open */
1005 #ifdef USE_TCP_WRAPPERS
1006 extern uschar *tcp_wrappers_daemon_name; /* tcpwrappers daemon lookup name */
1007 #endif
1008 extern int     test_harness_load_avg;  /* For use when testing */
1009 extern int     thismessage_size_limit; /* Limit for this message */
1010 extern int     timeout_frozen_after;   /* Max time to keep frozen messages */
1011
1012 extern uschar *transport_name;         /* Name of transport last started */
1013 extern int     transport_count;        /* Count of bytes transported */
1014 extern int     transport_newlines;     /* Accurate count of number of newline chars transported */
1015 extern const uschar **transport_filter_argv; /* For on-the-fly filtering */
1016 extern int     transport_filter_timeout; /* Timeout for same */
1017
1018 extern transport_info transports_available[]; /* Vector of available transports */
1019 extern transport_instance *transports; /* Chain of instantiated transports */
1020 extern transport_instance transport_defaults; /* Default values */
1021
1022 extern int     transport_write_timeout;/* Set to time out individual writes */
1023
1024 extern tree_node *tree_dns_fails;      /* Tree of DNS lookup failures */
1025 extern tree_node *tree_duplicates;     /* Tree of duplicate addresses */
1026 extern tree_node *tree_nonrecipients;  /* Tree of nonrecipient addresses */
1027 extern tree_node *tree_unusable;       /* Tree of unusable addresses */
1028
1029 extern gid_t  *trusted_groups;         /* List of trusted groups */
1030 extern uid_t  *trusted_users;          /* List of trusted users */
1031 extern uschar *timezone_string;        /* Required timezone setting */
1032
1033 extern uschar *unknown_login;          /* To use when login id unknown */
1034 extern uschar *unknown_username;       /* Ditto */
1035 extern uschar *untrusted_set_sender;   /* Let untrusted users set these senders */
1036 extern uschar *uucp_from_pattern;      /* For recognizing "From " lines */
1037 extern uschar *uucp_from_sender;       /* For building the sender */
1038
1039 extern uschar *warn_message_file;      /* Template for warning messages */
1040 extern uschar *warnmsg_delay;          /* String form of delay time */
1041 extern uschar *warnmsg_recipients;     /* Recipients of warning message */
1042 extern BOOL    write_rejectlog;        /* Control of reject logging */
1043
1044 extern uschar *verify_mode;            /* Running a router in verify mode */
1045 extern uschar *version_copyright;      /* Copyright notice */
1046 extern uschar *version_date;           /* Date of compilation */
1047 extern uschar *version_cnumber;        /* Compile number */
1048 extern uschar *version_string;         /* Version string */
1049
1050 extern int     warning_count;          /* Delay warnings sent for this msg */
1051
1052 /* End of globals.h */