src/src/globals.h

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2016 */
   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   int     active;             /* fd/socket when in a TLS session */
  84   int     bits;               /* bits used in TLS session */
  85   BOOL    certificate_verified; /* Client certificate verified */
  86 #ifdef EXPERIMENTAL_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 BOOL    tls_offered;            /* Server offered TLS */
 123 extern uschar *tls_privatekey;         /* Private key file */
 124 extern BOOL    tls_remember_esmtp;     /* For YAEB */
 125 extern uschar *tls_require_ciphers;    /* So some can be avoided */
 126 extern uschar *tls_try_verify_hosts;   /* Optional client verification */
 127 extern uschar *tls_verify_certificates;/* Path for certificates to check */
 128 extern uschar *tls_verify_hosts;       /* Mandatory client verification */
 129 #endif
 130 extern uschar *tls_advertise_hosts;    /* host for which TLS is advertised */
 131
 132 extern uschar  *dsn_envid;             /* DSN envid string */
 133 extern int      dsn_ret;               /* DSN ret type*/
 134 extern const pcre  *regex_DSN;         /* For recognizing DSN settings */
 135 extern BOOL     smtp_use_dsn;          /* Global for passed connections */
 136 extern uschar  *dsn_advertise_hosts;   /* host for which TLS is advertised */
 137
 138 /* Input-reading functions for messages, so we can use special ones for
 139 incoming TCP/IP. */
 140
 141 extern int (*receive_getc)(void);
 142 extern int (*receive_ungetc)(int);
 143 extern int (*receive_feof)(void);
 144 extern int (*receive_ferror)(void);
 145 extern BOOL (*receive_smtp_buffered)(void);
 146
 147
 148 /* For clearing, saving, restoring address expansion variables. We have to have
 149 the size of this vector set explicitly, because it is referenced from more than
 150 one module. */
 151
 152 extern const uschar **address_expansions[ADDRESS_EXPANSIONS_COUNT];
 153
 154 /* General global variables */
 155
 156 extern BOOL    accept_8bitmime;        /* Allow *BITMIME incoming */
 157 extern uschar *add_environment;        /* List of environment variables to add */
 158 extern header_line *acl_added_headers; /* Headers added by an ACL */
 159 extern tree_node *acl_anchor;          /* Tree of named ACLs */
 160 extern uschar *acl_arg[9];             /* Argument to ACL call */
 161 extern int     acl_narg;               /* Number of arguments to ACL call */
 162 extern uschar *acl_not_smtp;           /* ACL run for non-SMTP messages */
 163 #ifdef WITH_CONTENT_SCAN
 164 extern uschar *acl_not_smtp_mime;      /* For MIME parts of ditto */
 165 #endif
 166 extern uschar *acl_not_smtp_start;     /* ACL run at the beginning of a non-SMTP session */
 167 extern uschar *acl_removed_headers;    /* Headers deleted by an ACL */
 168 extern uschar *acl_smtp_auth;          /* ACL run for AUTH */
 169 extern uschar *acl_smtp_connect;       /* ACL run on SMTP connection */
 170 extern uschar *acl_smtp_data;          /* ACL run after DATA received */
 171 #ifndef DISABLE_PRDR
 172 extern uschar *acl_smtp_data_prdr;     /* ACL run after DATA received if in PRDR mode*/
 173 const extern pcre *regex_PRDR;         /* For recognizing PRDR settings */
 174 #endif
 175 #ifndef DISABLE_DKIM
 176 extern uschar *acl_smtp_dkim;          /* ACL run for DKIM signatures / domains */
 177 #endif
 178 extern uschar *acl_smtp_etrn;          /* ACL run for ETRN */
 179 extern uschar *acl_smtp_expn;          /* ACL run for EXPN */
 180 extern uschar *acl_smtp_helo;          /* ACL run for HELO/EHLO */
 181 extern uschar *acl_smtp_mail;          /* ACL run for MAIL */
 182 extern uschar *acl_smtp_mailauth;      /* ACL run for MAIL AUTH */
 183 #ifdef WITH_CONTENT_SCAN
 184 extern uschar *acl_smtp_mime;          /* ACL run after DATA, before acl_smtp_data, for each MIME part */
 185 #endif
 186 extern uschar *acl_smtp_notquit;       /* ACL run for disconnects */
 187 extern uschar *acl_smtp_predata;       /* ACL run for DATA command */
 188 extern uschar *acl_smtp_quit;          /* ACL run for QUIT */
 189 extern uschar *acl_smtp_rcpt;          /* ACL run for RCPT */
 190 extern uschar *acl_smtp_starttls;      /* ACL run for STARTTLS */
 191 extern uschar *acl_smtp_vrfy;          /* ACL run for VRFY */
 192 extern BOOL    acl_temp_details;       /* TRUE to give details for 4xx error */
 193 extern tree_node *acl_var_c;           /* ACL connection variables */
 194 extern tree_node *acl_var_m;           /* ACL message variables */
 195 extern uschar *acl_verify_message;     /* User message for verify failure */
 196 extern string_item *acl_warn_logged;   /* Logged lines */
 197 extern uschar *acl_wherecodes[];       /* Response codes for ACL fails */
 198 extern uschar *acl_wherenames[];       /* Names for messages */
 199 extern BOOL    active_local_from_check;/* For adding Sender: (switchable) */
 200 extern BOOL    active_local_sender_retain; /* For keeping Sender: (switchable) */
 201 extern address_item *addr_duplicate;   /* Duplicate address list */
 202 extern address_item address_defaults;  /* Default data for address item */
 203 extern uschar *address_file;           /* Name of file when delivering to one */
 204 extern uschar *address_pipe;           /* Pipe command when delivering to one */
 205 extern BOOL    address_test_mode;      /* True for -bt */
 206 extern tree_node *addresslist_anchor;  /* Tree of defined address lists */
 207 extern int     addresslist_count;      /* Number defined */
 208 extern gid_t  *admin_groups;           /* List of admin groups */
 209 extern BOOL    admin_user;             /* True if caller can do admin */
 210 extern BOOL    allow_auth_unadvertised;/* As it says */
 211 extern BOOL    allow_domain_literals;  /* As it says */
 212 extern BOOL    allow_mx_to_ip;         /* Allow MX records to -> ip address */
 213 extern BOOL    allow_unqualified_recipient; /* As it says */
 214 extern BOOL    allow_unqualified_sender; /* Ditto */
 215 extern BOOL    allow_utf8_domains;     /* For experimenting */
 216 extern uschar *authenticated_fail_id;  /* ID that failed authentication */
 217 extern uschar *authenticated_id;       /* ID that was authenticated */
 218 extern uschar *authenticated_sender;   /* From AUTH on MAIL */
 219 extern BOOL    authentication_failed;  /* TRUE if AUTH was tried and failed */
 220 extern uschar *auth_advertise_hosts;   /* Only advertise to these */
 221 extern auth_info auths_available[];    /* Vector of available auth mechanisms */
 222 extern auth_instance *auths;           /* Chain of instantiated auths */
 223 extern auth_instance auth_defaults;    /* Default values */
 224 extern uschar *auth_defer_msg;         /* Error message for log */
 225 extern uschar *auth_defer_user_msg;    /* Error message for user */
 226 extern uschar *auth_vars[];            /* $authn variables */
 227 extern int     auto_thaw;              /* Auto-thaw interval */
 228 #ifdef WITH_CONTENT_SCAN
 229 extern BOOL    av_failed;              /* TRUE if the AV process failed */
 230 extern uschar *av_scanner;             /* AntiVirus scanner to use for the malware condition */
 231 #endif
 232
 233 extern BOOL    background_daemon;      /* Set FALSE to keep in foreground */
 234 extern uschar *base62_chars;           /* Table of base-62 characters */
 235 extern uschar *bi_command;             /* Command for -bi option */
 236 extern uschar *big_buffer;             /* Used for various temp things */
 237 extern int     big_buffer_size;        /* Current size (can expand) */
 238 #ifdef EXPERIMENTAL_BRIGHTMAIL
 239 extern uschar *bmi_alt_location;       /* expansion variable that contains the alternate location for the rcpt (available during routing) */
 240 extern uschar *bmi_base64_tracker_verdict; /* expansion variable with base-64 encoded OLD verdict string (available during routing) */
 241 extern uschar *bmi_base64_verdict;     /* expansion variable with base-64 encoded verdict string (available during routing) */
 242 extern uschar *bmi_config_file;        /* Brightmail config file */
 243 extern int     bmi_deliver;            /* Flag that determines if the message should be delivered to the rcpt (available during routing) */
 244 extern int     bmi_run;                /* Flag that determines if message should be run through Brightmail server */
 245 extern uschar *bmi_verdicts;           /* BASE64-encoded verdicts with recipient lists */
 246 #endif
 247 extern int     body_8bitmime;          /* sender declared BODY= ; 7=7BIT, 8=8BITMIME */
 248 extern uschar *bounce_message_file;    /* Template file */
 249 extern uschar *bounce_message_text;    /* One-liner */
 250 extern uschar *bounce_recipient;       /* When writing an errmsg */
 251 extern BOOL    bounce_return_body;     /* Include body in returned message */
 252 extern int     bounce_return_linesize_limit; /* Max line length in return */
 253 extern BOOL    bounce_return_message;  /* Include message in bounce */
 254 extern int     bounce_return_size_limit; /* Max amount to return */
 255 extern uschar *bounce_sender_authentication; /* AUTH address for bounces */
 256 extern int     bsmtp_transaction_linecount; /* Start of last transaction */
 257
 258 extern uschar *callout_address;         /* Address used for a malware/spamd/verify etc. callout */
 259 extern int     callout_cache_domain_positive_expire; /* Time for positive domain callout cache records to expire */
 260 extern int     callout_cache_domain_negative_expire; /* Time for negative domain callout cache records to expire */
 261 extern int     callout_cache_positive_expire; /* Time for positive callout cache records to expire */
 262 extern int     callout_cache_negative_expire; /* Time for negative callout cache records to expire */
 263 extern uschar *callout_random_local_part; /* Local part to be used to check if server called will accept any local part */
 264 extern uschar *check_dns_names_pattern;/* Regex for syntax check */
 265 extern int     check_log_inodes;       /* Minimum for message acceptance */
 266 extern int     check_log_space;        /* Minimum for message acceptance */
 267 extern BOOL    check_rfc2047_length;   /* Check RFC 2047 encoded string length */
 268 extern int     check_spool_inodes;     /* Minimum for message acceptance */
 269 extern int     check_spool_space;      /* Minimum for message acceptance */
 270 extern uschar *chunking_advertise_hosts;    /* RFC 3030 CHUNKING */
 271 extern uschar *client_authenticator;        /* Authenticator name used for smtp delivery */
 272 extern uschar *client_authenticated_id;     /* "login" name used for SMTP AUTH */
 273 extern uschar *client_authenticated_sender; /* AUTH option to SMTP MAIL FROM (not yet used) */
 274 extern int     clmacro_count;          /* Number of command line macros */
 275 extern uschar *clmacros[];             /* Copy of them, for re-exec */
 276 extern int     connection_max_messages;/* Max down one SMTP connection */
 277 extern BOOL    config_changed;         /* True if -C used */
 278 extern FILE   *config_file;            /* Configuration file */
 279 extern uschar *config_filename;        /* Configuration file name */
 280 #ifdef CONFIGURE_GROUP
 281 extern gid_t   config_gid;             /* Additional group owner */
 282 #endif
 283 extern int     config_lineno;          /* Line number */
 284 extern uschar *config_main_filelist;   /* List of possible config files */
 285 extern uschar *config_main_filename;   /* File name actually used */
 286 extern uschar *config_main_directory;  /* Directory where the main config file was found */
 287 #ifdef CONFIGURE_OWNER
 288 extern uid_t   config_uid;             /* Additional owner */
 289 #endif
 290 extern uschar *continue_hostname;      /* Host for continued delivery */
 291 extern uschar *continue_host_address;  /* IP address for ditto */
 292 extern BOOL    continue_more;          /* Flag more addresses waiting */
 293 extern int     continue_sequence;      /* Sequence num for continued delivery */
 294 extern uschar *continue_transport;     /* Transport for continued delivery */
 295
 296 extern uschar *csa_status;             /* Client SMTP Authorization result */
 297
 298 typedef struct {
 299   BOOL         delivery;               /* When to attempt */
 300   int          fd;                     /* Open connection */
 301   int          nrcpt;                  /* Count of addresses */
 302   uschar *     interface;              /* (address of) */
 303   host_item    host;                   /* Host used */
 304   address_item addr;                   /* (Chain of) addresses */
 305 } cut_t;
 306 extern cut_t cutthrough;               /* Deliver-concurrently */
 307
 308 extern BOOL    daemon_listen;          /* True if listening required */
 309 extern uschar *daemon_smtp_port;       /* Can be a list of ports */
 310 extern int     daemon_startup_retries; /* Number of times to retry */
 311 extern int     daemon_startup_sleep;   /* Sleep between retries */
 312
 313 #ifdef EXPERIMENTAL_DCC
 314 extern BOOL    dcc_direct_add_header;  /* directly add header */
 315 extern uschar *dcc_header;             /* dcc header */
 316 extern uschar *dcc_result;             /* dcc result */
 317 extern uschar *dccifd_address;         /* address of the dccifd daemon */
 318 extern uschar *dccifd_options;         /* options for the dccifd daemon */
 319 #endif
 320
 321 extern BOOL    debug_daemon;           /* Debug the daemon process only */
 322 extern int     debug_fd;               /* The fd for debug_file */
 323 extern FILE   *debug_file;             /* Where to write debugging info */
 324 extern int     debug_notall[];         /* Debug options excluded from +all */
 325 extern bit_table debug_options[];      /* Table of debug options */
 326 extern int     debug_options_count;    /* Size of table */
 327 extern int     delay_warning[];        /* Times between warnings */
 328 extern uschar *delay_warning_condition; /* Condition string for warnings */
 329 extern BOOL    delivery_date_remove;   /* Remove delivery-date headers */
 330
 331 extern uschar *deliver_address_data;   /* Arbitrary data for an address */
 332 extern int     deliver_datafile;       /* FD for data part of message */
 333 extern const uschar *deliver_domain;   /* The local domain for delivery */
 334 extern uschar *deliver_domain_data;    /* From domain lookup */
 335 extern const uschar *deliver_domain_orig; /* The original local domain for delivery */
 336 extern const uschar *deliver_domain_parent; /* The parent domain for delivery */
 337 extern BOOL    deliver_drop_privilege; /* TRUE for unprivileged delivery */
 338 extern BOOL    deliver_firsttime;      /* True for first delivery attempt */
 339 extern BOOL    deliver_force;          /* TRUE if delivery was forced */
 340 extern BOOL    deliver_freeze;         /* TRUE if delivery is frozen */
 341 extern time_t  deliver_frozen_at;      /* Time of freezing */
 342 extern uschar *deliver_home;           /* Home directory for pipes */
 343 extern const uschar *deliver_host;     /* (First) host for routed local deliveries */
 344                                        /* Remote host for filter */
 345 extern const uschar *deliver_host_address; /* Address for remote delivery filter */
 346 extern int     deliver_host_port;      /* Address for remote delivery filter */
 347 extern uschar *deliver_in_buffer;      /* Buffer for copying file */
 348 extern ino_t   deliver_inode;          /* Inode for appendfile */
 349 extern uschar *deliver_localpart;      /* The local part for delivery */
 350 extern uschar *deliver_localpart_data; /* From local part lookup */
 351 extern uschar *deliver_localpart_orig; /* The original local part for delivery */
 352 extern uschar *deliver_localpart_parent; /* The parent local part for delivery */
 353 extern uschar *deliver_localpart_prefix; /* The stripped prefix, if any */
 354 extern uschar *deliver_localpart_suffix; /* The stripped suffix, if any */
 355 extern BOOL    deliver_force_thaw;     /* TRUE to force thaw in queue run */
 356 extern BOOL    deliver_manual_thaw;    /* TRUE if manually thawed */
 357 extern uschar *deliver_out_buffer;     /* Buffer for copying file */
 358 extern int     deliver_queue_load_max; /* Different value for queue running */
 359 extern address_item *deliver_recipients; /* Current set of addresses */
 360 extern uschar *deliver_selectstring;   /* For selecting by recipient */
 361 extern BOOL    deliver_selectstring_regex; /* String is regex */
 362 extern uschar *deliver_selectstring_sender; /* For selecting by sender */
 363 extern BOOL    deliver_selectstring_sender_regex; /* String is regex */
 364 extern BOOL    disable_callout_flush;  /* Don't flush before callouts */
 365 extern BOOL    disable_delay_flush;    /* Don't flush before "delay" in ACL */
 366 #ifdef ENABLE_DISABLE_FSYNC
 367 extern BOOL    disable_fsync;          /* Not for normal use */
 368 #endif
 369 extern BOOL    disable_ipv6;           /* Don't do any IPv6 things */
 370 extern BOOL    disable_logging;        /* Disables log writing when TRUE */
 371
 372 #ifndef DISABLE_DKIM
 373 extern BOOL    dkim_collect_input;     /* Runtime flag that tracks wether SMTP input is fed to DKIM validation */
 374 extern uschar *dkim_cur_signer;        /* Expansion variable, holds the current "signer" domain or identity during a acl_smtp_dkim run */
 375 extern BOOL    dkim_disable_verify;    /* Set via ACL control statement. When set, DKIM verification is disabled for the current message */
 376 extern int     dkim_key_length;        /* Expansion variable, length of signing key in bits */
 377 extern uschar *dkim_signers;           /* Expansion variable, holds colon-separated list of domains and identities that have signed a message */
 378 extern uschar *dkim_signing_domain;    /* Expansion variable, domain used for signing a message. */
 379 extern uschar *dkim_signing_selector;  /* Expansion variable, selector used for signing a message. */
 380 extern uschar *dkim_verify_signers;    /* Colon-separated list of domains for each of which we call the DKIM ACL */
 381 #endif
 382 #ifdef EXPERIMENTAL_DMARC
 383 extern BOOL    dmarc_has_been_checked; /* Global variable to check if test has been called yet */
 384 extern uschar *dmarc_ar_header;        /* Expansion variable, suggested header for dmarc auth results */
 385 extern uschar *dmarc_domain_policy;    /* Expansion for declared policy of used domain */
 386 extern uschar *dmarc_forensic_sender;  /* Set sender address for forensic reports */
 387 extern uschar *dmarc_history_file;     /* Expansion variable, file to store dmarc results */
 388 extern uschar *dmarc_status;           /* Expansion variable, one word value */
 389 extern uschar *dmarc_status_text;      /* Expansion variable, human readable value */
 390 extern uschar *dmarc_tld_file;         /* Mozilla TLDs text file */
 391 extern uschar *dmarc_used_domain;      /* Expansion variable, domain libopendmarc chose for DMARC policy lookup */
 392 extern BOOL    dmarc_disable_verify;   /* Set via ACL control statement. When set, DMARC verification is disabled for the current message */
 393 extern BOOL    dmarc_enable_forensic;  /* Set via ACL control statement. When set, DMARC forensic reports are enabled for the current message */
 394 #endif
 395
 396 extern uschar *dns_again_means_nonexist; /* Domains that are badly set up */
 397 extern int     dns_csa_search_limit;   /* How deep to search for CSA SRV records */
 398 extern BOOL    dns_csa_use_reverse;    /* Check CSA in reverse DNS? (non-standard) */
 399 extern uschar *dns_ipv4_lookup;        /* For these domains, don't look for AAAA (or A6) */
 400 #ifdef EXPERIMENTAL_DANE
 401 extern int     dns_dane_ok;            /* Ok to use DANE when checking TLS authenticity */
 402 #endif
 403 extern int     dns_retrans;            /* Retransmission time setting */
 404 extern int     dns_retry;              /* Number of retries */
 405 extern int     dns_dnssec_ok;          /* When constructing DNS query, set DO flag */
 406 extern uschar *dns_trust_aa;           /* DNSSEC trust AA as AD */
 407 extern int     dns_use_edns0;          /* Coerce EDNS0 support on/off in resolver. */
 408 extern uschar *dnslist_domain;         /* DNS (black) list domain */
 409 extern uschar *dnslist_matched;        /* DNS (black) list matched key */
 410 extern uschar *dnslist_text;           /* DNS (black) list text message */
 411 extern uschar *dnslist_value;          /* DNS (black) list IP address */
 412 extern tree_node *domainlist_anchor;   /* Tree of defined domain lists */
 413 extern int     domainlist_count;       /* Number defined */
 414 extern BOOL    dont_deliver;           /* TRUE for -N option */
 415 extern BOOL    dot_ends;               /* TRUE if "." ends non-SMTP input */
 416
 417 /* This option is now a no-opt, retained for compatibility */
 418 extern BOOL    drop_cr;                /* For broken local MUAs */
 419
 420 extern uschar *dsn_from;               /* From: string for DSNs */
 421
 422 extern BOOL    enable_dollar_recipients; /* Make $recipients available */
 423 extern int     envelope_to_remove;     /* Remove envelope_to_headers */
 424 extern int     errno_quota;            /* Quota errno in this OS */
 425 extern int     error_handling;         /* Error handling style */
 426 extern uschar *errors_copy;            /* For taking copies of errors */
 427 extern uschar *errors_reply_to;        /* Reply-to for error messages */
 428 extern int     errors_sender_rc;       /* Return after message to sender*/
 429
 430 #ifndef DISABLE_EVENT
 431 extern uschar *event_action;           /* expansion for delivery events */
 432 extern uschar *event_data;             /* event data */
 433 extern int     event_defer_errno;      /* error number set when a remote delivery is deferred with a host error */
 434 extern const uschar *event_name;       /* event classification */
 435 #endif
 436
 437 extern gid_t   exim_gid;               /* To be used with exim_uid */
 438 extern BOOL    exim_gid_set;           /* TRUE if exim_gid set */
 439 extern uschar *exim_path;              /* Path to exec exim */
 440 extern const uschar *exim_sieve_extension_list[]; /* list of sieve extensions */
 441 extern uid_t   exim_uid;               /* Non-root uid for exim */
 442 extern BOOL    exim_uid_set;           /* TRUE if exim_uid set */
 443 extern int     expand_forbid;          /* RDO flags for forbidding things */
 444 extern int     expand_nlength[];       /* Lengths of numbered strings */
 445 extern int     expand_nmax;            /* Max numerical value */
 446 extern uschar *expand_nstring[];       /* Numbered strings */
 447 extern BOOL    expand_string_forcedfail; /* TRUE if failure was "expected" */
 448 extern BOOL    extract_addresses_remove_arguments; /* Controls -t behaviour */
 449 extern uschar *extra_local_interfaces; /* Local, non-listen interfaces */
 450
 451 extern int     fake_response;          /* Fake FAIL or DEFER response to data */
 452 extern uschar *fake_response_text;     /* User defined message for the above. Default is in globals.c. */
 453 extern int     filter_n[FILTER_VARIABLE_COUNT]; /* filter variables */
 454 extern BOOL    filter_running;         /* TRUE while running a filter */
 455 extern int     filter_sn[FILTER_VARIABLE_COUNT]; /* variables set by system filter */
 456 extern int     filter_test;            /* Filter test type */
 457 extern uschar *filter_test_sfile;      /* System filter test file */
 458 extern uschar *filter_test_ufile;      /* User filter test file */
 459 extern uschar *filter_thisaddress;     /* For address looping */
 460 extern int     finduser_retries;       /* Retry count for getpwnam() */
 461 extern uid_t   fixed_never_users[];    /* Can't be overridden */
 462 extern uschar *freeze_tell;            /* Message on (some) freezings */
 463 extern uschar *freeze_tell_config;     /* The configured setting */
 464 extern uschar *fudged_queue_times;     /* For use in test harness */
 465
 466 extern uschar *gecos_name;             /* To be expanded when pattern matches */
 467 extern uschar *gecos_pattern;          /* Pattern to match */
 468 extern rewrite_rule *global_rewrite_rules;  /* Chain of rewriting rules */
 469
 470 extern int     header_insert_maxlen;   /* Max for inserting headers */
 471 extern int     header_maxsize;         /* Max total length for header */
 472 extern int     header_line_maxsize;    /* Max for an individual line */
 473 extern header_name header_names[];     /* Table of header names */
 474 extern int     header_names_size;      /* Number of entries */
 475 extern BOOL    header_rewritten;       /* TRUE if header changed by router */
 476 extern uschar *helo_accept_junk_hosts; /* Allowed to use junk arg */
 477 extern uschar *helo_allow_chars;       /* Rogue chars to allow in HELO/EHLO */
 478 extern uschar *helo_lookup_domains;    /* If these given, lookup host name */
 479 extern uschar *helo_try_verify_hosts;  /* Soft check HELO argument for these */
 480 extern BOOL    helo_verified;          /* True if HELO verified */
 481 extern BOOL    helo_verify_failed;     /* True if attempt failed */
 482 extern uschar *helo_verify_hosts;      /* Hard check HELO argument for these */
 483 extern const uschar *hex_digits;             /* Used in several places */
 484 extern uschar *hold_domains;           /* Hold up deliveries to these */
 485 extern BOOL    host_find_failed_syntax;/* DNS syntax check failure */
 486 extern BOOL    host_checking_callout;  /* TRUE if real callout wanted */
 487 extern uschar *host_data;              /* Obtained from lookup in ACL */
 488 extern uschar *host_lookup;            /* For which IP addresses are always looked up */
 489 extern BOOL    host_lookup_deferred;   /* TRUE if lookup deferred */
 490 extern BOOL    host_lookup_failed;     /* TRUE if lookup failed */
 491 extern uschar *host_lookup_order;      /* Order of host lookup types */
 492 extern uschar *host_lookup_msg;        /* Text for why it failed */
 493 extern int     host_number;            /* For sharing spools */
 494 extern uschar *host_number_string;     /* For expanding */
 495 extern uschar *host_reject_connection; /* Reject these hosts */
 496 extern tree_node *hostlist_anchor;     /* Tree of defined host lists */
 497 extern int     hostlist_count;         /* Number defined */
 498 extern uschar *hosts_connection_nolog; /* Limits the logging option */
 499 extern uschar *hosts_treat_as_local;   /* For routing */
 500
 501 extern int     ignore_bounce_errors_after; /* Keep them for this time. */
 502 extern BOOL    ignore_fromline_local;  /* Local SMTP ignore fromline */
 503 extern uschar *ignore_fromline_hosts;  /* Hosts permitted to send "From " */
 504 extern BOOL    inetd_wait_mode;        /* Whether running in inetd wait mode */
 505 extern int     inetd_wait_timeout;     /* Timeout for inetd wait mode */
 506 extern uschar *initial_cwd;            /* The directory we where in at startup */
 507 extern BOOL    is_inetd;               /* True for inetd calls */
 508 extern uschar *iterate_item;           /* Item from iterate list */
 509
 510 extern int     journal_fd;             /* Fd for journal file */
 511
 512 extern uschar *keep_environment;       /* Whitelist for environment variables */
 513 extern int     keep_malformed;         /* Time to keep malformed messages */
 514
 515 extern uschar *eldap_dn;               /* Where LDAP DNs are left */
 516 extern int     load_average;           /* Most recently read load average */
 517 extern BOOL    local_error_message;    /* True if handling one of these */
 518 extern BOOL    local_from_check;       /* For adding Sender: (global value) */
 519 extern uschar *local_from_prefix;      /* Permitted prefixes */
 520 extern uschar *local_from_suffix;      /* Permitted suffixes */
 521 extern uschar *local_interfaces;       /* For forcing specific interfaces */
 522 extern uschar *local_scan_data;        /* Text returned by local_scan() */
 523 extern optionlist local_scan_options[];/* Option list for local_scan() */
 524 extern int     local_scan_options_count; /* Size of the list */
 525 extern int     local_scan_timeout;     /* Timeout for local_scan() */
 526 extern BOOL    local_sender_retain;    /* Retain Sender: (with no From: check) */
 527 extern gid_t   local_user_gid;         /* As it says; may be set in routers */
 528 extern uid_t   local_user_uid;         /* As it says; may be set in routers */
 529 extern tree_node *localpartlist_anchor;/* Tree of defined localpart lists */
 530 extern int     localpartlist_count;    /* Number defined */
 531 extern uschar *log_buffer;             /* For constructing log entries */
 532 extern int     log_default[];          /* Initialization list for log_selector */
 533 extern uschar *log_file_path;          /* If unset, use default */
 534 extern int     log_notall[];           /* Log options excluded from +all */
 535 extern bit_table log_options[];        /* Table of options */
 536 extern int     log_options_count;      /* Size of table */
 537 extern int     log_reject_target;      /* Target log for ACL rejections */
 538 extern unsigned int log_selector[];    /* Bit map of logging options */
 539 extern uschar *log_selector_string;    /* As supplied in the config */
 540 extern FILE   *log_stderr;             /* Copy of stderr for log use, or NULL */
 541 extern BOOL    log_testing_mode;       /* TRUE in various testing modes */
 542 extern BOOL    log_timezone;           /* TRUE to include the timezone in log lines */
 543 extern uschar *login_sender_address;   /* The actual sender address */
 544 extern lookup_info **lookup_list;      /* Array of pointers to available lookups */
 545 extern int     lookup_list_count;      /* Number of entries in the list */
 546 extern uschar *lookup_dnssec_authenticated; /* AD status of dns lookup */
 547 extern int     lookup_open_max;        /* Max lookup files to cache */
 548 extern uschar *lookup_value;           /* Value looked up from file */
 549
 550 extern macro_item *macros;             /* Configuration macros */
 551 extern uschar *mailstore_basename;     /* For mailstore deliveries */
 552 #ifdef WITH_CONTENT_SCAN
 553 extern uschar *malware_name;           /* Name of virus or malware ("W32/Klez-H") */
 554 #endif
 555 extern int     max_received_linelength;/* What it says */
 556 extern int     max_username_length;    /* For systems with broken getpwnam() */
 557 extern int     message_age;            /* In seconds */
 558 extern uschar *message_body;           /* Start of message body for filter */
 559 extern uschar *message_body_end;       /* End of message body for filter */
 560 extern BOOL    message_body_newlines;  /* FALSE => remove newlines */
 561 extern int     message_body_size;      /* Sic */
 562 extern int     message_body_visible;   /* Amount visible in message_body */
 563 extern int     message_ended;          /* State of message reading and how ended */
 564 extern uschar *message_headers;        /* When built */
 565 extern uschar  message_id_option[];    /* -E<message-id> for use as option */
 566 extern uschar *message_id_external;    /* External form of following */
 567 extern uschar *message_id_domain;      /* Expanded to form domain-part of message_id */
 568 extern uschar *message_id_text;        /* Expanded to form message_id */
 569 extern struct timeval message_id_tv;   /* Time used to create last message_id */
 570 extern int     message_linecount;      /* As it says */
 571 extern BOOL    message_logs;           /* TRUE to write message logs */
 572 extern int     message_size;           /* Size of message */
 573 extern uschar *message_size_limit;     /* As it says */
 574 #ifdef SUPPORT_I18N
 575 extern BOOL    message_smtputf8;       /* Internationalized mail handling */
 576 extern int     message_utf8_downconvert; /* convert from utf8 */
 577 const extern pcre *regex_UTF8;         /* For recognizing SMTPUTF8 settings */
 578 #endif
 579 extern uschar  message_subdir[];       /* Subdirectory for messages */
 580 extern uschar *message_reference;      /* Reference for error messages */
 581
 582 /* MIME ACL expandables */
 583 #ifdef WITH_CONTENT_SCAN
 584 extern int     mime_anomaly_level;
 585 extern const uschar *mime_anomaly_text;
 586 extern uschar *mime_boundary;
 587 extern uschar *mime_charset;
 588 extern uschar *mime_content_description;
 589 extern uschar *mime_content_disposition;
 590 extern uschar *mime_content_id;
 591 extern unsigned int mime_content_size;
 592 extern uschar *mime_content_transfer_encoding;
 593 extern uschar *mime_content_type;
 594 extern uschar *mime_decoded_filename;
 595 extern uschar *mime_filename;
 596 extern int     mime_is_multipart;
 597 extern int     mime_is_coverletter;
 598 extern int     mime_is_rfc822;
 599 extern int     mime_part_count;
 600 #endif
 601
 602 extern BOOL    mua_wrapper;            /* TRUE when Exim is wrapping an MUA */
 603
 604 extern uid_t  *never_users;            /* List of uids never to be used */
 605 #ifdef WITH_CONTENT_SCAN
 606 extern BOOL    no_mbox_unspool;        /* don't unlink files in /scan directory */
 607 #endif
 608 extern BOOL    no_multiline_responses; /* For broken clients */
 609
 610 extern optionlist optionlist_auths[];      /* These option lists are made */
 611 extern int     optionlist_auths_size;      /* global so that readconf can */
 612 extern optionlist optionlist_routers[];    /* see them for printing out   */
 613 extern int     optionlist_routers_size;    /* the options.                */
 614 extern optionlist optionlist_transports[];
 615 extern int     optionlist_transports_size;
 616
 617 extern uid_t   original_euid;          /* Original effective uid */
 618 extern gid_t   originator_gid;         /* Gid of whoever wrote spool file */
 619 extern uschar *originator_login;       /* Login of same */
 620 extern uschar *originator_name;        /* Full name of same */
 621 extern uid_t   originator_uid;         /* Uid of ditto */
 622 extern uschar *override_local_interfaces; /* Value of -oX argument */
 623 extern uschar *override_pid_file_path; /* Value of -oP argument */
 624
 625 extern BOOL    parse_allow_group;      /* Allow group syntax */
 626 extern BOOL    parse_found_group;      /* In the middle of a group */
 627 extern uschar *percent_hack_domains;   /* Local domains for which '% operates */
 628 extern uschar *pid_file_path;          /* For writing daemon pids */
 629 extern uschar *pipelining_advertise_hosts; /* As it says */
 630 extern BOOL    pipelining_enable;      /* As it says */
 631 #ifndef DISABLE_PRDR
 632 extern BOOL    prdr_enable;            /* As it says */
 633 extern BOOL    prdr_requested;         /* Connecting mail server wants PRDR */
 634 #endif
 635 extern BOOL    preserve_message_logs;  /* Save msglog files */
 636 extern uschar *primary_hostname;       /* Primary name of this computer */
 637 extern BOOL    print_topbitchars;      /* Topbit chars are printing chars */
 638 extern uschar  process_info[];         /* For SIGUSR1 output */
 639 extern int     process_info_len;
 640 extern uschar *process_log_path;       /* Alternate path */
 641 extern BOOL    prod_requires_admin;    /* TRUE if prodding requires admin */
 642
 643 #if defined(SUPPORT_PROXY) || defined(SUPPORT_SOCKS)
 644 extern uschar *hosts_proxy;            /* Hostlist which (require) use proxy protocol */
 645 extern uschar *proxy_external_address; /* IP of remote interface of proxy */
 646 extern int     proxy_external_port;    /* Port on remote interface of proxy */
 647 extern uschar *proxy_local_address;    /* IP of local interface of proxy */
 648 extern int     proxy_local_port;       /* Port on local interface of proxy */
 649 extern BOOL    proxy_session;          /* TRUE if receiving mail from valid proxy  */
 650 extern BOOL    proxy_session_failed;   /* TRUE if required proxy negotiation failed */
 651 #endif
 652
 653 extern uschar *prvscheck_address;      /* Set during prvscheck expansion item */
 654 extern uschar *prvscheck_keynum;       /* Set during prvscheck expansion item */
 655 extern uschar *prvscheck_result;       /* Set during prvscheck expansion item */
 656
 657 extern const uschar *qualify_domain_recipient; /* Domain to qualify recipients with */
 658 extern uschar *qualify_domain_sender;  /* Domain to qualify senders with */
 659 extern BOOL    queue_2stage;           /* Run queue in 2-stage manner */
 660 extern uschar *queue_domains;          /* Queue these domains */
 661 extern BOOL    queue_list_requires_admin; /* TRUE if -bp requires admin */
 662 extern BOOL    queue_run_first_delivery; /* If TRUE, first deliveries only */
 663 extern BOOL    queue_run_force;        /* TRUE to force during queue run */
 664 extern BOOL    queue_run_local;        /* Local deliveries only in queue run */
 665 extern BOOL    queue_running;          /* TRUE for queue running process and */
 666                                        /*   immediate children */
 667 extern pid_t   queue_run_pid;          /* PID of the queue running process or 0 */
 668 extern int     queue_run_pipe;         /* Pipe for synchronizing */
 669 extern int     queue_interval;         /* Queue running interval */
 670 extern uschar *queue_name;             /* Name of queue, if nondefault spooling */
 671 extern BOOL    queue_only;             /* TRUE to disable immediate delivery */
 672 extern int     queue_only_load;        /* Max load before auto-queue */
 673 extern BOOL    queue_only_load_latch;  /* Latch queue_only_load TRUE */
 674 extern uschar *queue_only_file;        /* Queue if file exists/not-exists */
 675 extern BOOL    queue_only_override;    /* Allow override from command line */
 676 extern BOOL    queue_only_policy;      /* ACL or local_scan wants queue_only */
 677 extern BOOL    queue_run_in_order;     /* As opposed to random */
 678 extern uschar *queue_run_max;          /* Max queue runners */
 679 extern BOOL    queue_smtp;             /* Disable all immediate STMP (-odqs)*/
 680 extern uschar *queue_smtp_domains;     /* Ditto, for these domains */
 681
 682 extern unsigned int random_seed;       /* Seed for random numbers */
 683 extern tree_node *ratelimiters_cmd;    /* Results of command ratelimit checks */
 684 extern tree_node *ratelimiters_conn;   /* Results of connection ratelimit checks */
 685 extern tree_node *ratelimiters_mail;   /* Results of per-mail ratelimit checks */
 686 extern uschar *raw_active_hostname;    /* Pre-expansion */
 687 extern uschar *raw_sender;             /* Before rewriting */
 688 extern uschar **raw_recipients;        /* Before rewriting */
 689 extern int     raw_recipients_count;
 690 extern int     rcpt_count;             /* Count of RCPT commands in a message */
 691 extern int     rcpt_fail_count;        /* Those that got 5xx */
 692 extern int     rcpt_defer_count;       /* Those that got 4xx */
 693 extern gid_t   real_gid;               /* Real gid */
 694 extern uid_t   real_uid;               /* Real user running program */
 695 extern BOOL    really_exim;            /* FALSE in utilities */
 696 extern BOOL    receive_call_bombout;   /* Flag for crashing log */
 697 extern int     receive_linecount;      /* Mainly for BSMTP errors */
 698 extern int     receive_messagecount;   /* Mainly for BSMTP errors */
 699 extern int     receive_timeout;        /* For non-SMTP acceptance */
 700 extern int     received_count;         /* Count of Received: headers */
 701 extern uschar *received_for;           /* For "for" field */
 702 extern uschar *received_header_text;   /* Definition of Received: header */
 703 extern int     received_headers_max;   /* Max count of Received: headers */
 704 extern int     received_time;          /* Time the message was received */
 705 extern uschar *recipient_data;         /* lookup data for recipients */
 706 extern uschar *recipient_unqualified_hosts; /* Permitted unqualified recipients */
 707 extern uschar *recipient_verify_failure; /* What went wrong */
 708 extern BOOL    recipients_discarded;   /* By an ACL */
 709 extern int     recipients_list_max;    /* Maximum number fitting in list */
 710 extern int     recipients_max;         /* Max permitted */
 711 extern int     recipients_max_reject;  /* If TRUE, reject whole message */
 712 extern const pcre *regex_AUTH;         /* For recognizing AUTH settings */
 713 extern const pcre  *regex_check_dns_names; /* For DNS name checking */
 714 extern const pcre  *regex_From;        /* For recognizing "From_" lines */
 715 extern const pcre  *regex_IGNOREQUOTA; /* For recognizing IGNOREQUOTA (LMTP) */
 716 extern const pcre  *regex_PIPELINING;  /* For recognizing PIPELINING */
 717 extern const pcre  *regex_SIZE;        /* For recognizing SIZE settings */
 718 extern const pcre  *regex_ismsgid;     /* Compiled r.e. for message it */
 719 extern const pcre  *regex_smtp_code;   /* For recognizing SMTP codes */
 720 extern uschar *regex_vars[];           /* $regexN variables */
 721 #ifdef WHITELIST_D_MACROS
 722 extern const pcre  *regex_whitelisted_macro; /* For -D macro values */
 723 #endif
 724 #ifdef WITH_CONTENT_SCAN
 725 extern uschar *regex_match_string;     /* regex that matched a line (regex ACL condition) */
 726 #endif
 727 extern int     remote_delivery_count;  /* Number of remote addresses */
 728 extern int     remote_max_parallel;    /* Maximum parallel delivery */
 729 extern uschar *remote_sort_domains;    /* Remote domain sorting order */
 730 extern retry_config *retries;          /* Chain of retry config information */
 731 extern int     retry_data_expire;      /* When to expire retry data */
 732 extern int     retry_interval_max;     /* Absolute maximum */
 733 extern int     retry_maximum_timeout;  /* The maximum timeout */
 734 extern uschar *return_path;            /* Return path for a message */
 735 extern BOOL    return_path_remove;     /* Remove return-path headers */
 736 extern int     rewrite_existflags;     /* Indicate which headers have rewrites */
 737 extern uschar *rfc1413_hosts;          /* RFC hosts */
 738 extern int     rfc1413_query_timeout;  /* Timeout on RFC 1413 calls */
 739 /* extern BOOL    rfc821_domains;  */       /* If set, syntax is 821, not 822 => being abolished */
 740 extern uid_t   root_gid;               /* The gid for root */
 741 extern uid_t   root_uid;               /* The uid for root */
 742 extern router_info routers_available[];/* Vector of available routers */
 743 extern router_instance *routers;       /* Chain of instantiated routers */
 744 extern router_instance router_defaults;/* Default values */
 745 extern uschar *router_name;            /* Name of router last started */
 746 extern BOOL    running_in_test_harness; /*TRUE when running_status is patched */
 747 extern ip_address_item *running_interfaces; /* Host's running interfaces */
 748 extern uschar *running_status;         /* Flag string for testing */
 749 extern int     runrc;                  /* rc from ${run} */
 750
 751 extern uschar *search_error_message;   /* Details of lookup problem */
 752 extern BOOL    search_find_defer;      /* Set TRUE if lookup deferred */
 753 extern uschar *self_hostname;          /* Self host after routing->directors */
 754 extern unsigned int sender_address_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for sender */
 755 extern uschar *sender_address_data;    /* address_data from sender verify */
 756 extern BOOL    sender_address_forced;  /* Set by -f */
 757 extern uschar *sender_address_unrewritten; /* Set if rewritten by verify */
 758 extern uschar *sender_data;            /* lookup result for senders */
 759 extern unsigned int sender_domain_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for sender domain */
 760 extern uschar *sender_fullhost;        /* Sender host name + address */
 761 extern BOOL    sender_helo_dnssec;     /* True if HELO verify used DNS and was DNSSEC */
 762 extern uschar *sender_helo_name;       /* Host name from HELO/EHLO */
 763 extern uschar **sender_host_aliases;   /* Points to list of alias names */
 764 extern unsigned int sender_host_cache[(MAX_NAMED_LIST * 2)/32]; /* Cache bits for incoming host */
 765 extern BOOL    sender_host_dnssec;     /* true if sender_host_name verified in DNSSEC */
 766 extern BOOL    sender_host_notsocket;  /* Set for -bs and -bS */
 767 extern BOOL    sender_host_unknown;    /* TRUE for -bs and -bS except inetd */
 768 extern uschar *sender_ident;           /* Sender identity via RFC 1413 */
 769 extern BOOL    sender_local;           /* TRUE for local senders */
 770 extern BOOL    sender_name_forced;     /* Set by -F */
 771 extern uschar *sender_rate;            /* Sender rate computed by ACL */
 772 extern uschar *sender_rate_limit;      /* Configured rate limit */
 773 extern uschar *sender_rate_period;     /* Configured smoothing period */
 774 extern uschar *sender_rcvhost;         /* Host data for Received: */
 775 extern BOOL    sender_set_untrusted;   /* Sender set by untrusted caller */
 776 extern uschar *sender_unqualified_hosts; /* Permitted unqualified senders */
 777 extern uschar *sender_verify_failure;  /* What went wrong */
 778 extern address_item *sender_verified_list; /* Saved chain of sender verifies */
 779 extern address_item *sender_verified_failed; /* The one that caused denial */
 780 extern uschar *sending_ip_address;     /* Address of outgoing (SMTP) interface */
 781 extern int     sending_port;           /* Port of outgoing interface */
 782 extern SIGNAL_BOOL sigalrm_seen;       /* Flag for sigalrm_handler */
 783 extern uschar **sighup_argv;           /* Args for re-execing after SIGHUP */
 784 extern int     slow_lookup_log;        /* Log DNS lookups taking loger than N millisecs */
 785 extern int     smtp_accept_count;      /* Count of connections */
 786 extern BOOL    smtp_accept_keepalive;  /* Set keepalive on incoming */
 787 extern int     smtp_accept_max;        /* Max SMTP connections */
 788 extern int     smtp_accept_max_nonmail;/* Max non-mail commands in one con */
 789 extern uschar *smtp_accept_max_nonmail_hosts; /* Limit non-mail cmds from these hosts */
 790 extern int     smtp_accept_max_per_connection; /* Max msgs per connection */
 791 extern uschar *smtp_accept_max_per_host; /* Max SMTP cons from one IP addr */
 792 extern int     smtp_accept_queue;      /* Queue after so many connections */
 793 extern int     smtp_accept_queue_per_connection; /* Queue after so many msgs */
 794 extern int     smtp_accept_reserve;    /* Reserve these SMTP connections */
 795 extern uschar *smtp_active_hostname;   /* Hostname for this message */
 796 extern BOOL    smtp_authenticated;     /* Sending client has authenticated */
 797 extern uschar *smtp_banner;            /* Banner string (to be expanded) */
 798 extern BOOL    smtp_check_spool_space; /* TRUE to check SMTP SIZE value */
 799 extern int     smtp_ch_index;          /* Index in smtp_connection_had */
 800 extern uschar *smtp_cmd_argument;      /* For all SMTP commands */
 801 extern uschar *smtp_cmd_buffer;        /* SMTP command buffer */
 802 extern time_t  smtp_connection_start;  /* Start time of SMTP connection */
 803 extern uschar  smtp_connection_had[];  /* Recent SMTP commands */
 804 extern int     smtp_connect_backlog;   /* Max backlog permitted */
 805 extern double  smtp_delay_mail;        /* Current MAIL delay */
 806 extern double  smtp_delay_rcpt;        /* Current RCPT delay */
 807 extern BOOL    smtp_enforce_sync;      /* Enforce sync rules */
 808 extern uschar *smtp_etrn_command;      /* Command to run */
 809 extern BOOL    smtp_etrn_serialize;    /* Only one at once */
 810 extern FILE   *smtp_in;                /* Incoming SMTP input file */
 811 extern int     smtp_load_reserve;      /* Only from reserved if load > this */
 812 extern int     smtp_mailcmd_count;     /* Count of MAIL commands */
 813 extern int     smtp_max_synprot_errors;/* Max syntax/protocol errors */
 814 extern int     smtp_max_unknown_commands; /* As it says */
 815 extern uschar *smtp_notquit_reason;    /* Global for disconnect reason */
 816 extern FILE   *smtp_out;               /* Incoming SMTP output file */
 817 extern uschar *smtp_ratelimit_hosts;   /* Rate limit these hosts */
 818 extern uschar *smtp_ratelimit_mail;    /* Parameters for MAIL limiting */
 819 extern uschar *smtp_ratelimit_rcpt;    /* Parameters for RCPT limiting */
 820 extern uschar *smtp_read_error;        /* Message for SMTP input error */
 821 extern int     smtp_receive_timeout;   /* Applies to each received line */
 822 extern uschar *smtp_receive_timeout_s; /* ... expandable version */
 823 extern uschar *smtp_reserve_hosts;     /* Hosts for reserved slots */
 824 extern BOOL    smtp_return_error_details; /* TRUE to return full info */
 825 extern int     smtp_rlm_base;          /* Base interval for MAIL rate limit */
 826 extern double  smtp_rlm_factor;        /* Factor for MAIL rate limit */
 827 extern int     smtp_rlm_limit;         /* Max delay */
 828 extern int     smtp_rlm_threshold;     /* Threshold for RCPT rate limit */
 829 extern int     smtp_rlr_base;          /* Base interval for RCPT rate limit */
 830 extern double  smtp_rlr_factor;        /* Factor for RCPT rate limit */
 831 extern int     smtp_rlr_limit;         /* Max delay */
 832 extern int     smtp_rlr_threshold;     /* Threshold for RCPT rate limit */
 833 extern BOOL    smtp_use_pipelining;    /* Global for passed connections */
 834 extern BOOL    smtp_use_size;          /* Global for passed connections */
 835 #ifdef SUPPORT_I18N
 836 extern uschar *smtputf8_advertise_hosts; /* ingress control */
 837 #endif
 838
 839 #ifdef WITH_CONTENT_SCAN
 840 extern uschar *spamd_address;          /* address for the spamassassin daemon */
 841 extern uschar *spam_bar;               /* the spam "bar" (textual representation of spam_score) */
 842 extern uschar *spam_report;            /* the spamd report (multiline) */
 843 extern uschar *spam_action;            /* the spamd recommended-action */
 844 extern uschar *spam_score;             /* the spam score (float) */
 845 extern uschar *spam_score_int;         /* spam_score * 10 (int) */
 846 #endif
 847 #ifdef EXPERIMENTAL_SPF
 848 extern uschar *spf_guess;              /* spf best-guess record */
 849 extern uschar *spf_header_comment;     /* spf header comment */
 850 extern uschar *spf_received;           /* Received-SPF: header */
 851 extern uschar *spf_result;             /* spf result in string form */
 852 extern uschar *spf_smtp_comment;       /* spf comment to include in SMTP reply */
 853 #endif
 854 extern BOOL    split_spool_directory;  /* TRUE to use multiple subdirs */
 855 extern uschar *spool_directory;        /* Name of spool directory */
 856 #ifdef EXPERIMENTAL_SRS
 857 extern uschar *srs_config;             /* SRS config secret:max age:hash length:use timestamp:use hash */
 858 extern uschar *srs_db_address;         /* SRS db address */
 859 extern uschar *srs_db_key;             /* SRS db key */
 860 extern int     srs_hashlength;         /* SRS hash length */
 861 extern int     srs_hashmin;            /* SRS minimum hash length */
 862 extern int     srs_maxage;             /* SRS max age */
 863 extern uschar *srs_orig_sender;        /* SRS original sender */
 864 extern uschar *srs_orig_recipient;     /* SRS original recipient */
 865 extern uschar *srs_recipient;          /* SRS recipient */
 866 extern uschar *srs_secrets;            /* SRS secrets list */
 867 extern uschar *srs_status;             /* SRS staus */
 868 extern BOOL    srs_usehash;            /* SRS use hash flag */
 869 extern BOOL    srs_usetimestamp;       /* SRS use timestamp flag */
 870 #endif
 871 extern BOOL    strict_acl_vars;        /* ACL variables have to be set before being used */
 872 extern int     string_datestamp_offset;/* After insertion by string_format */
 873 extern int     string_datestamp_length;/* After insertion by string_format */
 874 extern int     string_datestamp_type;  /* After insertion by string_format */
 875 extern BOOL    strip_excess_angle_brackets; /* Surrounding route-addrs */
 876 extern BOOL    strip_trailing_dot;     /* Remove dots at ends of domains */
 877 extern uschar *submission_domain;      /* Domain for submission mode */
 878 extern BOOL    submission_mode;        /* Can be forced from ACL */
 879 extern uschar *submission_name;        /* User name set from ACL */
 880 extern BOOL    suppress_local_fixups;  /* Can be forced from ACL */
 881 extern BOOL    suppress_local_fixups_default; /* former is reset to this; override with -G */
 882 extern BOOL    synchronous_delivery;   /* TRUE if -odi is set */
 883 extern BOOL    syslog_duplication;     /* FALSE => no duplicate logging */
 884 extern int     syslog_facility;        /* As defined by Syslog.h */
 885 extern uschar *syslog_processname;     /* 'ident' param to openlog() */
 886 extern BOOL    syslog_timestamp;       /* TRUE if time on syslogs */
 887 extern uschar *system_filter;          /* Name of system filter file */
 888
 889 extern uschar *system_filter_directory_transport;  /* Transports for the */
 890 extern uschar *system_filter_file_transport;       /* system filter */
 891 extern uschar *system_filter_pipe_transport;
 892 extern uschar *system_filter_reply_transport;
 893
 894 extern gid_t   system_filter_gid;      /* Gid for running system filter */
 895 extern BOOL    system_filter_gid_set;  /* TRUE if gid set */
 896 extern uid_t   system_filter_uid;      /* Uid for running system filter */
 897 extern BOOL    system_filter_uid_set;  /* TRUE if uid set */
 898 extern BOOL    system_filtering;       /* TRUE when running system filter */
 899
 900 extern BOOL    tcp_nodelay;            /* Controls TCP_NODELAY on daemon */
 901 #ifdef USE_TCP_WRAPPERS
 902 extern uschar *tcp_wrappers_daemon_name; /* tcpwrappers daemon lookup name */
 903 #endif
 904 extern int     test_harness_load_avg;  /* For use when testing */
 905 extern int     thismessage_size_limit; /* Limit for this message */
 906 extern int     timeout_frozen_after;   /* Max time to keep frozen messages */
 907 extern BOOL    timestamps_utc;         /* Use UTC for all times */
 908
 909 extern uschar *transport_name;         /* Name of transport last started */
 910 extern int     transport_count;        /* Count of bytes transported */
 911 extern int     transport_newlines;     /* Accurate count of number of newline chars transported */
 912 extern const uschar **transport_filter_argv; /* For on-the-fly filtering */
 913 extern int     transport_filter_timeout; /* Timeout for same */
 914 extern BOOL    transport_filter_timed_out; /* True if it did */
 915
 916 extern transport_info transports_available[]; /* Vector of available transports */
 917 extern transport_instance *transports; /* Chain of instantiated transports */
 918 extern transport_instance transport_defaults; /* Default values */
 919
 920 extern int     transport_write_timeout;/* Set to time out individual writes */
 921
 922 extern tree_node *tree_dns_fails;      /* Tree of DNS lookup failures */
 923 extern tree_node *tree_duplicates;     /* Tree of duplicate addresses */
 924 extern tree_node *tree_nonrecipients;  /* Tree of nonrecipient addresses */
 925 extern tree_node *tree_unusable;       /* Tree of unusable addresses */
 926
 927 extern BOOL    trusted_caller;         /* Caller is trusted */
 928 extern BOOL    trusted_config;         /* Configuration file is trusted */
 929 extern gid_t  *trusted_groups;         /* List of trusted groups */
 930 extern uid_t  *trusted_users;          /* List of trusted users */
 931 extern uschar *timezone_string;        /* Required timezone setting */
 932
 933 extern uschar *unknown_login;          /* To use when login id unknown */
 934 extern uschar *unknown_username;       /* Ditto */
 935 extern uschar *untrusted_set_sender;   /* Let untrusted users set these senders */
 936 extern uschar *uucp_from_pattern;      /* For recognizing "From " lines */
 937 extern uschar *uucp_from_sender;       /* For building the sender */
 938
 939 extern uschar *warn_message_file;      /* Template for warning messages */
 940 extern uschar *warnmsg_delay;          /* String form of delay time */
 941 extern uschar *warnmsg_recipients;     /* Recipients of warning message */
 942 extern BOOL    write_rejectlog;        /* Control of reject logging */
 943
 944 extern uschar *verify_mode;            /* Running a router in verify mode */
 945 extern uschar *version_copyright;      /* Copyright notice */
 946 extern uschar *version_date;           /* Date of compilation */
 947 extern uschar *version_cnumber;        /* Compile number */
 948 extern uschar *version_string;         /* Version string */
 949
 950 extern int     warning_count;          /* Delay warnings sent for this msg */
 951
 952 /* End of globals.h */