1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2015 */
6 /* See the file NOTICE for conditions of use and distribution. */
9 /* Definitions of various structures. In addition, those that are visible for
10 the compilation of local_scan() are defined in local_scan.h. These are
16 For those declared here, we have to pre-declare some because of mutually
17 recursive definitions in the auths, routers, and transports blocks. */
25 struct transport_info;
28 /* Structure for remembering macros for the configuration file */
30 typedef struct macro_item {
31 struct macro_item *next;
38 /* Structure for bit tables for debugging and logging */
40 typedef struct bit_table {
45 /* Block for holding a uid and gid, possibly unset, and an initgroups flag. */
47 typedef struct ugid_block {
55 typedef enum { CHUNKING_NOT_OFFERED = -1,
58 CHUNKING_LAST} chunking_state_t;
60 /* Structure for holding information about a host for use mainly by routers,
61 but also used when checking lists of hosts and when transporting. Looking up
62 host addresses is done using this structure. */
64 typedef enum {DS_UNK=-1, DS_NO, DS_YES} dnssec_status_t;
66 typedef struct host_item {
67 struct host_item *next;
68 const uschar *name; /* Host name */
69 const uschar *address; /* IP address in text form */
70 int port; /* port value in host order (if SRV lookup) */
71 int mx; /* MX value if found via MX records */
72 int sort_key; /* MX*1000 plus random "fraction" */
73 int status; /* Usable, unusable, or unknown */
74 int why; /* Why host is unusable */
75 int last_try; /* Time of last try if known */
76 dnssec_status_t dnssec;
79 /* Chain of rewrite rules, read from the rewrite config, or parsed from the
80 rewrite_headers field of a transport. */
82 typedef struct rewrite_rule {
83 struct rewrite_rule *next;
89 /* This structure is used to pass back configuration data from the smtp
90 transport to the outside world. It is used during callback processing. If ever
91 another remote transport were implemented, it could use the same structure. */
93 typedef struct transport_feedback {
100 BOOL hosts_randomize;
104 } transport_feedback;
106 /* Routers, transports, and authenticators have similar data blocks. Each
107 driver that is compiled into the code is represented by a xxx_info block; the
108 active drivers are represented by a chain of xxx_instance blocks. To make it
109 possible to use the same code for reading the configuration files for all
110 three, the layout of the start of the blocks is kept the same, and represented
111 by the generic structures driver_info and driver_instance. */
113 typedef struct driver_instance {
114 struct driver_instance *next;
115 uschar *name; /* Instance name */
116 struct driver_info *info; /* Points to info for this driver */
117 void *options_block; /* Pointer to private options */
118 uschar *driver_name; /* All start with this generic option */
121 typedef struct driver_info {
122 uschar *driver_name; /* Name of driver */
123 optionlist *options; /* Table of private options names */
124 int *options_count; /* -> Number of entries in table */
125 void *options_block; /* Points to default private block */
126 int options_len; /* Length of same in bytes */
127 void (*init)( /* Initialization entry point */
128 struct driver_instance *);
132 /* Structure for holding information about the configured transports. Some
133 of the generally accessible options are set from the configuration file; others
134 are set by transport initialization, since they can only be set for certain
135 transports. They need to be generally accessible, however, as they are used by
136 the main transport code. */
138 typedef struct transport_instance {
139 struct transport_instance *next;
140 uschar *name; /* Instance name */
141 struct transport_info *info; /* Info for this driver */
142 void *options_block; /* Pointer to private options */
143 uschar *driver_name; /* Must be first */
144 int (*setup)( /* Setup entry point */
145 struct transport_instance *,
146 struct address_item *,
147 struct transport_feedback *, /* For passing back config data */
148 uid_t, /* The uid that will be used */
149 gid_t, /* The gid that will be used */
150 uschar **); /* For an error message */
151 /**************************************/
152 int batch_max; /* ) */
153 uschar *batch_id; /* ) */
154 uschar *home_dir; /* ) Used only for local transports */
155 uschar *current_dir; /* ) */
156 /**************************************/
157 uschar *expand_multi_domain; /* ) */
158 BOOL multi_domain; /* ) */
159 BOOL overrides_hosts; /* ) Used only for remote transports */
160 int max_addresses; /* ) */
161 int connection_max_messages;/* ) */
162 /**************************************/
163 BOOL deliver_as_creator; /* Used only by pipe at present */
164 BOOL disable_logging; /* For very weird requirements */
165 BOOL initgroups; /* Initialize groups when setting uid */
166 BOOL uid_set; /* uid is set */
167 BOOL gid_set; /* gid is set */
170 uschar *expand_uid; /* Variable uid */
171 uschar *expand_gid; /* Variable gid */
172 uschar *warn_message; /* Used only by appendfile at present */
173 uschar *shadow; /* Name of shadow transport */
174 uschar *shadow_condition; /* Condition for running it */
175 uschar *filter_command; /* For on-the-fly-filtering */
176 uschar *add_headers; /* Add these headers */
177 uschar *remove_headers; /* Remove these headers */
178 uschar *return_path; /* Overriding (rewriting) return path */
179 uschar *debug_string; /* Debugging output */
180 uschar *max_parallel; /* Number of concurrent instances */
181 uschar *message_size_limit; /* Biggest message this transport handles */
182 uschar *headers_rewrite; /* Rules for rewriting headers */
183 rewrite_rule *rewrite_rules; /* Parsed rewriting rules */
184 int rewrite_existflags; /* Bits showing which headers are rewritten */
185 int filter_timeout; /* For transport filter timing */
186 BOOL body_only; /* Deliver only the body */
187 BOOL delivery_date_add; /* Add Delivery-Date header */
188 BOOL envelope_to_add; /* Add Envelope-To header */
189 BOOL headers_only; /* Deliver only the headers */
190 BOOL rcpt_include_affixes; /* TRUE to retain affixes in RCPT commands */
191 BOOL return_path_add; /* Add Return-Path header */
192 BOOL return_output; /* TRUE if output should always be returned */
193 BOOL return_fail_output; /* ditto, but only on failure */
194 BOOL log_output; /* Similarly for logging */
195 BOOL log_fail_output;
196 BOOL log_defer_output;
197 BOOL retry_use_local_part; /* Defaults true for local, false for remote */
198 #ifndef DISABLE_EVENT
199 uschar *event_action; /* String to expand on notable events */
201 } transport_instance;
204 /* Structure for holding information about a type of transport. The first six
205 fields must match driver_info above. */
207 typedef struct transport_info {
208 uschar *driver_name; /* Driver name */
209 optionlist *options; /* Table of private options names */
210 int *options_count; /* -> Number of entries in table */
211 void *options_block; /* Points to default private block */
212 int options_len; /* Length of same in bytes */
213 void (*init)( /* Initialization function */
214 struct transport_instance *);
216 BOOL (*code)( /* Main entry point */
217 transport_instance *,
218 struct address_item *);
219 void (*tidyup)( /* Tidyup function */
220 struct transport_instance *);
221 void (*closedown)( /* For closing down a passed channel */
222 struct transport_instance *);
223 BOOL local; /* TRUE for local transports */
227 /* smtp transport datachunk callback */
229 #define tc_reap_prev BIT(0) /* Flags: reap previous SMTP cmd responses */
230 #define tc_chunk_last BIT(1) /* annotate chunk SMTP cmd as LAST */
232 struct transport_context;
233 typedef int (*tpt_chunk_cmd_cb)(struct transport_context *, unsigned, unsigned);
235 /* Structure for information about a delivery-in-progress */
237 typedef struct transport_context {
238 transport_instance * tblock; /* transport */
239 struct address_item * addr;
240 uschar * check_string; /* string replacement */
241 uschar * escape_string;
242 int options; /* output processing topt_* */
244 /* items below only used with option topt_use_bdat */
245 tpt_chunk_cmd_cb chunk_cb; /* per-datachunk callback */
256 /* Structure for holding information about the configured routers. */
258 typedef struct router_instance {
259 struct router_instance *next;
261 struct router_info *info;
262 void *options_block; /* Pointer to private options */
263 uschar *driver_name; /* Must be first */
265 uschar *address_data; /* Arbitrary data */
266 #ifdef EXPERIMENTAL_BRIGHTMAIL
267 uschar *bmi_rule; /* Brightmail AntiSpam rule checking */
269 uschar *cannot_route_message; /* Used when routing fails */
270 uschar *condition; /* General condition */
271 uschar *current_directory; /* For use during delivery */
272 uschar *debug_string; /* Debugging output */
273 uschar *domains; /* Specific domains */
274 uschar *errors_to; /* Errors address */
275 uschar *expand_gid; /* Expanded gid string */
276 uschar *expand_uid; /* Expanded uid string */
277 uschar *expand_more; /* Expanded more string */
278 uschar *expand_unseen; /* Expanded unseen string */
279 uschar *extra_headers; /* Additional headers */
280 uschar *fallback_hosts; /* For remote transports (text list) */
281 uschar *home_directory; /* For use during delivery */
282 uschar *ignore_target_hosts; /* Target hosts to ignore */
283 uschar *local_parts; /* Specific local parts */
284 uschar *pass_router_name; /* Router for passed address */
285 uschar *prefix; /* Address prefix */
286 uschar *redirect_router_name; /* Router for generated address */
287 uschar *remove_headers; /* Removed headers */
288 uschar *require_files; /* File checks before router is run */
289 uschar *router_home_directory; /* For use while routing */
290 uschar *self; /* Text option for handling self reference */
291 uschar *senders; /* Specific senders */
292 uschar *suffix; /* Address suffix */
293 uschar *translate_ip_address; /* IP address translation fudgery */
294 uschar *transport_name; /* Transport name */
296 BOOL address_test; /* Use this router when testing addresses */
297 #ifdef EXPERIMENTAL_BRIGHTMAIL
298 BOOL bmi_deliver_alternate; /* TRUE => BMI said that message should be delivered to alternate location */
299 BOOL bmi_deliver_default; /* TRUE => BMI said that message should be delivered to default location */
300 BOOL bmi_dont_deliver; /* TRUE => BMI said that message should not be delivered at all */
302 BOOL expn; /* Use this router when processing EXPN */
303 BOOL caseful_local_part; /* TRUE => don't lowercase */
304 BOOL check_local_user; /* TRUE => check local user */
305 BOOL disable_logging; /* For very weird requirements */
306 BOOL fail_verify_recipient; /* Fail verify if recipient match this router */
307 BOOL fail_verify_sender; /* Fail verify if sender match this router */
308 BOOL gid_set; /* Flag to indicate gid is set */
309 BOOL initgroups; /* TRUE if initgroups is required */
310 BOOL log_as_local; /* TRUE logs as a local delivery */
311 BOOL more; /* If FALSE, do no more if this one fails */
312 BOOL pass_on_timeout; /* Treat timeout DEFERs as fails */
313 BOOL prefix_optional; /* Just what it says */
314 BOOL repeat_use; /* If FALSE, skip if ancestor used it */
315 BOOL retry_use_local_part; /* Just what it says */
316 BOOL same_domain_copy_routing; /* TRUE => copy routing for same domain */
317 BOOL self_rewrite; /* TRUE to rewrite headers if making local */
318 BOOL suffix_optional; /* As it says */
319 BOOL verify_only; /* Skip this router if not verifying */
320 BOOL verify_recipient; /* Use this router when verifying a recipient*/
321 BOOL verify_sender; /* Use this router when verifying a sender */
322 BOOL uid_set; /* Flag to indicate uid is set */
323 BOOL unseen; /* If TRUE carry on, even after success */
324 BOOL dsn_lasthop; /* If TRUE, this router is a DSN endpoint */
326 int self_code; /* Encoded version of "self" */
327 uid_t uid; /* Fixed uid value */
328 gid_t gid; /* Fixed gid value */
330 host_item *fallback_hostlist; /* For remote transport (block chain) */
331 transport_instance *transport; /* Transport block (when found) */
332 struct router_instance *pass_router; /* Actual router for passed address */
333 struct router_instance *redirect_router; /* Actual router for generated address */
335 dnssec_domains dnssec;
339 /* Structure for holding information about a type of router. The first six
340 fields must match driver_info above. */
342 typedef struct router_info {
344 optionlist *options; /* Table of private options names */
345 int *options_count; /* -> Number of entries in table */
346 void *options_block; /* Points to default private block */
347 int options_len; /* Length of same in bytes */
348 void (*init)( /* Initialization function */
349 struct router_instance *);
351 int (*code)( /* Main entry point */
353 struct address_item *,
356 struct address_item **,
357 struct address_item **,
358 struct address_item **,
359 struct address_item **);
360 void (*tidyup)( /* Tidyup function */
361 struct router_instance *);
362 int ri_flags; /* Descriptive flags */
366 /* Structure for holding information about a lookup type. */
368 #include "lookupapi.h"
371 /* Structure for holding information about the configured authentication
374 typedef struct auth_instance {
375 struct auth_instance *next;
376 uschar *name; /* Exim instance name */
377 struct auth_info *info; /* Pointer to driver info block */
378 void *options_block; /* Pointer to private options */
379 uschar *driver_name; /* Must be first */
380 uschar *advertise_condition; /* Are we going to advertise this?*/
381 uschar *client_condition; /* Should the client try this? */
382 uschar *public_name; /* Advertised name */
383 uschar *set_id; /* String to set when server as authenticated id */
384 uschar *set_client_id; /* String to set when client as client_authenticated id */
385 uschar *mail_auth_condition; /* Condition for AUTH on MAIL command */
386 uschar *server_debug_string; /* Debugging output */
387 uschar *server_condition; /* Authorization condition */
388 BOOL client; /* TRUE if client option(s) set */
389 BOOL server; /* TRUE if server options(s) set */
390 BOOL advertised; /* Set TRUE when advertised */
394 /* Structure for holding information about an authentication mechanism. The
395 first six fields must match driver_info above. */
397 typedef struct auth_info {
398 uschar *driver_name; /* e.g. "condition" */
399 optionlist *options; /* Table of private options names */
400 int *options_count; /* -> Number of entries in table */
401 void *options_block; /* Points to default private block */
402 int options_len; /* Length of same in bytes */
403 void (*init)( /* initialization function */
404 struct auth_instance *);
406 int (*servercode)( /* server function */
407 auth_instance *, /* the instance data */
408 uschar *); /* rest of AUTH command */
409 int (*clientcode)( /* client function */
410 struct auth_instance *,
411 struct smtp_inblock *, /* socket and input buffer */
412 struct smtp_outblock *, /* socket and output buffer */
413 int, /* command timeout */
414 uschar *, /* buffer for reading response */
415 int); /* sizeof buffer */
416 void (*version_report)( /* diagnostic version reporting */
417 FILE *); /* I/O stream to print to */
421 /* Structure for holding a single IP address and port; used for the chain of
422 addresses and ports for the local host. Make the char string large enough to
423 hold an IPv6 address. */
425 typedef struct ip_address_item {
426 struct ip_address_item *next;
428 BOOL v6_include_v4; /* Used in the daemon */
432 /* Structure for chaining together arbitrary strings. */
434 typedef struct string_item {
435 struct string_item *next;
439 /* Information about a soft delivery failure, for use when calculating
440 retry information. It's separate from the address block, because there
441 can be a chain of them for SMTP deliveries where multiple IP addresses
444 typedef struct retry_item {
445 struct retry_item *next; /* for chaining */
446 uschar *key; /* string identifying host/address/message */
447 int basic_errno; /* error code for this destination */
448 int more_errno; /* additional error information */
449 uschar *message; /* local error message */
450 int flags; /* see below */
453 /* Retry data flags */
455 #define rf_delete 0x0001 /* retry info is to be deleted */
456 #define rf_host 0x0002 /* retry info is for a remote host */
457 #define rf_message 0x0004 /* retry info is for a host+message */
459 /* Information about a constructed message that is to be sent using the
460 autoreply transport. This is pointed to from the address block. */
462 typedef struct reply_item {
463 uschar *from; /* ) */
464 uschar *reply_to; /* ) */
466 uschar *cc; /* ) specific header fields */
468 uschar *subject; /* ) */
469 uschar *headers; /* misc other headers, concatenated */
470 uschar *text; /* text string body */
471 uschar *file; /* file body */
472 BOOL file_expand; /* expand the body */
473 int expand_forbid; /* expansion lockout flags */
474 uschar *logfile; /* file to keep a log in */
475 uschar *oncelog; /* file to keep records in for once only */
476 time_t once_repeat; /* time to repeat "once only" */
477 BOOL return_message; /* send back the original message */
481 /* The address_item structure contains many fields which are used at various
482 times while delivering a message. Some are used only for remote deliveries;
483 some only for local. A particular set of fields is copied whenever a child
484 address is created. For convenience, we keep those fields in a separate
485 sub-structure so they can be copied in one go. This also means I won't forget
486 to edit the various copying places when new to-be-copied fields are added. */
488 typedef struct address_item_propagated {
489 uschar *address_data; /* arbitrary data to keep with the address */
490 uschar *domain_data; /* from "domains" lookup */
491 uschar *localpart_data; /* from "local_parts" lookup */
492 uschar *errors_address; /* where to send errors (NULL => sender) */
493 header_line *extra_headers; /* additional headers */
494 uschar *remove_headers; /* list of those to remove */
496 #ifdef EXPERIMENTAL_SRS
497 uschar *srs_sender; /* Change return path when delivering */
500 BOOL utf8_msg:1; /* requires SMTPUTF8 processing */
501 BOOL utf8_downcvt:1; /* mandatory downconvert on delivery */
502 BOOL utf8_downcvt_maybe:1; /* optional downconvert on delivery */
504 } address_item_propagated;
506 /* Bits for the flags field below */
508 #define af_allow_file 0x00000001 /* allow file in generated address */
509 #define af_allow_pipe 0x00000002 /* allow pipe in generated address */
510 #define af_allow_reply 0x00000004 /* allow autoreply in generated address */
511 #define af_dr_retry_exists 0x00000008 /* router retry record exists */
512 #define af_expand_pipe 0x00000010 /* expand pipe arguments */
513 #define af_file 0x00000020 /* file delivery; always with pfr */
514 #define af_gid_set 0x00000040 /* gid field is set */
515 #define af_home_expanded 0x00000080 /* home_dir is already expanded */
516 #define af_ignore_error 0x00000100 /* ignore delivery error */
517 #define af_initgroups 0x00000200 /* use initgroups() for local transporting */
518 #define af_local_host_removed 0x00000400 /* local host was backup */
519 #define af_lt_retry_exists 0x00000800 /* local transport retry exists */
520 #define af_pfr 0x00001000 /* pipe or file or reply delivery */
521 #define af_retry_skipped 0x00002000 /* true if retry caused some skipping */
522 #define af_retry_timedout 0x00004000 /* true if retry timed out */
523 #define af_uid_set 0x00008000 /* uid field is set */
524 #define af_hide_child 0x00010000 /* hide child in bounce/defer msgs */
525 #define af_sverify_told 0x00020000 /* sender verify failure notified */
526 #define af_verify_pmfail 0x00040000 /* verify failure was postmaster callout */
527 #define af_verify_nsfail 0x00080000 /* verify failure was null sender callout */
528 #define af_homonym 0x00100000 /* an ancestor has same address */
529 #define af_verify_routed 0x00200000 /* for cached sender verify: routed OK */
530 #define af_verify_callout 0x00400000 /* for cached sender verify: callout was specified */
531 #define af_include_affixes 0x00800000 /* delivered with affixes in RCPT */
532 #define af_cert_verified 0x01000000 /* delivered with verified TLS cert */
533 #define af_pass_message 0x02000000 /* pass message in bounces */
534 #define af_bad_reply 0x04000000 /* filter could not generate autoreply */
536 # define af_prdr_used 0x08000000 /* delivery used SMTP PRDR */
538 #define af_chunking_used 0x10000000 /* delivery used SMTP CHUNKING */
539 #define af_force_command 0x20000000 /* force_command in pipe transport */
540 #ifdef EXPERIMENTAL_DANE
541 # define af_dane_verified 0x40000000 /* TLS cert verify done with DANE */
544 # define af_utf8_downcvt 0x80000000 /* downconvert was done for delivery */
547 /* These flags must be propagated when a child is created */
549 #define af_propagate (af_ignore_error)
551 /* The main address structure. Note that fields that are to be copied to
552 generated addresses should be put in the address_item_propagated structure (see
553 above) rather than directly into the address_item structure. */
555 typedef struct address_item {
556 struct address_item *next; /* for chaining addresses */
557 struct address_item *parent; /* parent address */
558 struct address_item *first; /* points to first after group delivery */
559 struct address_item *dupof; /* points to address this is a duplicate of */
561 router_instance *start_router; /* generated address starts here */
562 router_instance *router; /* the router that routed */
563 transport_instance *transport; /* the transport to use */
565 host_item *host_list; /* host data for the transport */
566 host_item *host_used; /* host that took delivery or failed hard */
567 host_item *fallback_hosts; /* to try if delivery defers */
569 reply_item *reply; /* data for autoreply */
570 retry_item *retries; /* chain of retry information */
572 uschar *address; /* address being delivered or routed */
573 uschar *unique; /* used for disambiguating */
574 uschar *cc_local_part; /* caseful local part */
575 uschar *lc_local_part; /* lowercased local part */
576 uschar *local_part; /* points to cc or lc version */
577 uschar *prefix; /* stripped prefix of local part */
578 uschar *suffix; /* stripped suffix of local part */
579 const uschar *domain; /* working domain (lower cased) */
581 uschar *address_retry_key; /* retry key including full address */
582 uschar *domain_retry_key; /* retry key for domain only */
584 uschar *current_dir; /* current directory for transporting */
585 uschar *home_dir; /* home directory for transporting */
586 uschar *message; /* error message */
587 uschar *user_message; /* error message that can be sent over SMTP
588 or quoted in bounce message */
589 uschar *onetime_parent; /* saved original parent for onetime */
590 uschar **pipe_expandn; /* numeric expansions for pipe from filter */
591 uschar *return_filename; /* name of return file */
592 uschar *self_hostname; /* after self=pass */
593 uschar *shadow_message; /* info about shadow transporting */
596 uschar *cipher; /* Cipher used for transport */
597 void *ourcert; /* Certificate offered to peer, binary */
598 void *peercert; /* Certificate from peer, binary */
599 uschar *peerdn; /* DN of server's certificate */
600 int ocsp; /* OCSP status of peer cert */
603 #ifdef EXPERIMENTAL_DSN_INFO
604 const uschar *smtp_greeting; /* peer self-identification */
605 const uschar *helo_response; /* peer message */
608 uschar *authenticator; /* auth driver name used by transport */
609 uschar *auth_id; /* auth "login" name used by transport */
610 uschar *auth_sndr; /* AUTH arg to SMTP MAIL, used by transport */
612 uschar *dsn_orcpt; /* DSN orcpt value */
613 int dsn_flags; /* DSN flags */
614 int dsn_aware; /* DSN aware flag */
616 uid_t uid; /* uid for transporting */
617 gid_t gid; /* gid for transporting */
619 unsigned int flags; /* a row of bits, defined above */
620 unsigned int domain_cache[(MAX_NAMED_LIST * 2)/32];
621 unsigned int localpart_cache[(MAX_NAMED_LIST * 2)/32];
622 int mode; /* mode for local transporting to a file */
623 int more_errno; /* additional error information */
624 /* (may need to hold a timestamp) */
626 short int basic_errno; /* status after failure */
627 unsigned short child_count; /* number of child addresses */
628 short int return_file; /* fileno of return data file */
629 short int special_action; /* ( used when when deferred or failed */
631 /* ( contains = or - when successful SMTP delivered */
633 /* ( contains verify rc in sender verify cache */
634 short int transport_return; /* result of delivery attempt */
635 address_item_propagated prop; /* fields that are propagated to children */
638 /* The table of header names consists of items of this type */
647 /* Chain of information about errors (e.g. bad addresses) */
649 typedef struct error_block {
650 struct error_block *next;
655 /* Chain of file names when processing the queue */
657 typedef struct queue_filename {
658 struct queue_filename *next;
663 /* Chain of items of retry information, read from the retry config. */
665 typedef struct retry_rule {
666 struct retry_rule *next;
673 typedef struct retry_config {
674 struct retry_config *next;
682 /* Structure for each node in a tree, of which there are various kinds */
684 typedef struct tree_node {
685 struct tree_node *left; /* pointer to left child */
686 struct tree_node *right; /* pointer to right child */
689 void *ptr; /* pointer to data */
690 int val; /* or integer data */
692 uschar balance; /* balancing factor */
693 uschar name[1]; /* node name - variable length */
696 /* Structure for holding time-limited data such as DNS returns.
697 We use this rather than extending tree_node to avoid wasting
698 space for most tree use (variables...) at the cost of complexity
699 for the lookups cache */
701 typedef struct expiring_data {
702 time_t expiry; /* if nonzero, data invalid after this time */
703 void *ptr; /* pointer to data */
706 /* Structure for holding the handle and the cached last lookup for searches.
707 This block is pointed to by the tree entry for the file. The file can get
708 closed if too many are opened at once. There is a LRU chain for deciding which
711 typedef struct search_cache {
712 void *handle; /* lookup handle, or NULL if closed */
713 int search_type; /* search type */
714 tree_node *up; /* LRU up pointer */
715 tree_node *down; /* LRU down pointer */
716 tree_node *item_cache; /* tree of cached results */
719 /* Structure for holding a partially decoded DNS record; the name has been
720 uncompressed, but the data pointer is into the raw data. */
723 uschar name[DNS_MAXNAME]; /* domain name */
724 int type; /* record type */
725 unsigned short ttl; /* time-to-live, seconds */
726 int size; /* size of data */
727 const uschar *data; /* pointer to data */
730 /* Structure for holding the result of a DNS query. */
733 int answerlen; /* length of the answer */
734 uschar answer[MAXPACKET]; /* the answer itself */
737 /* Structure for holding the intermediate data while scanning a DNS answer
741 int rrcount; /* count of RRs in the answer */
742 const uschar *aptr; /* pointer in the answer while scanning */
743 dns_record srr; /* data from current record in scan */
746 /* Structure for holding a chain of IP addresses that are extracted from
747 an A, AAAA, or A6 record. For the first two, there is only ever one address,
748 but the chaining feature of A6 allows for several addresses to be realized from
749 a single initial A6 record. The structure defines the address field of length
750 1. In use, a suitable sized block is obtained to hold the complete textual
753 typedef struct dns_address {
754 struct dns_address *next;
758 /* Structure used for holding intermediate data during MD5 computations. */
762 unsigned int abcd[4];
766 /* Structure used for holding intermediate data during SHA-1 computations. */
768 typedef struct sha1 {
774 /* Structure used to hold incoming packets of SMTP responses for a specific
775 socket. The packets which may contain multiple lines (and in some cases,
776 multiple responses). */
778 typedef struct smtp_inblock {
779 int sock; /* the socket */
780 int buffersize; /* the size of the buffer */
781 uschar *ptr; /* current position in the buffer */
782 uschar *ptrend; /* end of data in the buffer */
783 uschar *buffer; /* the buffer itself */
786 /* Structure used to hold buffered outgoing packets of SMTP commands for a
787 specific socket. The packets which may contain multiple lines when pipelining
790 typedef struct smtp_outblock {
791 int sock; /* the socket */
792 int cmd_count; /* count of buffered commands */
793 int buffersize; /* the size of the buffer */
794 BOOL authenticating; /* TRUE when authenticating */
795 uschar *ptr; /* current position in the buffer */
796 uschar *buffer; /* the buffer itself */
799 /* Structure to hold information about the source of redirection information */
801 typedef struct redirect_block {
802 uschar *string; /* file name or string */
803 uid_t *owners; /* allowed file owners */
804 gid_t *owngroups; /* allowed file groups */
805 struct passwd *pw; /* possible owner if not NULL */
806 int modemask; /* forbidden bits */
807 BOOL isfile; /* TRUE if string is a file name */
808 BOOL check_owner; /* TRUE, FALSE, or TRUE_UNSET */
809 BOOL check_group; /* TRUE, FALSE, or TRUE_UNSET */
812 /* Structure for passing arguments to check_host() */
814 typedef struct check_host_block {
815 const uschar *host_name;
816 const uschar *host_address;
817 const uschar *host_ipv4;
821 /* Structure for remembering lookup data when caching the result of
822 a lookup in a named list. */
824 typedef struct namedlist_cacheblock {
825 struct namedlist_cacheblock *next;
828 } namedlist_cacheblock;
830 /* Structure for holding data for an entry in a named list */
832 typedef struct namedlist_block {
833 const uschar *string; /* the list string */
834 namedlist_cacheblock *cache_data; /* cached domain_data or localpart_data */
835 int number; /* the number of the list for caching */
838 /* Structures for Access Control Lists */
840 typedef struct acl_condition_block {
841 struct acl_condition_block *next;
848 } acl_condition_block;
850 typedef struct acl_block {
851 struct acl_block *next;
852 acl_condition_block *condition;
856 /* smtp transport calc outbound_ip */
857 typedef BOOL (*oicf) (uschar *message_id, void *data);
859 /* DKIM information for transport */
862 uschar *dkim_private_key;
863 uschar *dkim_selector;
865 uschar *dkim_sign_headers;
870 /* End of structs.h */